FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU Baek, SH
Curro, NJ
Klimczuk, T
Sakai, H
Bauer, ED
Ronning, F
Thompson, JD
AF Baek, S. -H.
Curro, N. J.
Klimczuk, T.
Sakai, H.
Bauer, E. D.
Ronning, F.
Thompson, J. D.
TI Hybridization-driven gap in U3Bi4Ni3: A Bi-209 NMR/NQR study
SO PHYSICAL REVIEW B
LA English
DT Article
DE bismuth alloys; hyperfine interactions; Knight shift; Kondo effect;
nickel alloys; nuclear quadrupole resonance; spin-lattice relaxation;
uranium alloys
ID SEMICONDUCTING PROPERTIES; HEAVY-FERMION; CE3BI4PT3; SMB6; CU
AB We report Bi-209 nuclear-magnetic-resonance and nuclear-quadrupole-resonance measurements on a single crystal of the Kondo insulator U3Bi4Ni3. The Bi-209 nuclear-spin-lattice relaxation rate (T-1(-1)) shows activated behavior and is well fit by a spin gap of 220 K. The Bi-209 Knight shift (K) exhibits a strong temperature dependence arising from 5f electrons, in which K is negative at high temperatures and increases as the temperature is lowered. Below 50 K, K shows a broad maximum and decreases slightly upon further cooling. Our data provide insight into the evolution of the hyperfine fields in a fully gapped Kondo insulator based on 5f electron hybridization.
C1 [Baek, S. -H.; Klimczuk, T.; Sakai, H.; Bauer, E. D.; Ronning, F.; Thompson, J. D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
[Klimczuk, T.] Gdansk Univ Technol, Fac Appl Phys & Math, PL-80952 Gdansk, Poland.
[Sakai, H.] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan.
RP Baek, SH (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
RI Bauer, Eric/D-7212-2011; Klimczuk, Tomasz/M-1716-2013; Baek,
Seung-Ho/F-4733-2011; Curro, Nicholas/D-3413-2009
OI Klimczuk, Tomasz/0000-0003-2602-5049; Baek,
Seung-Ho/0000-0002-0059-8255; Curro, Nicholas/0000-0001-7829-0237
NR 21
TC 4
Z9 4
U1 2
U2 13
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 19
AR 195120
DI 10.1103/PhysRevB.79.195120
PG 4
WC Physics, Condensed Matter
SC Physics
GA 451WJ
UT WOS:000266501300049
ER
PT J
AU Baranov, NV
Proshkin, AV
Czternasty, C
Meissner, M
Podlesnyak, A
Podgornykh, SM
AF Baranov, N. V.
Proshkin, A. V.
Czternasty, C.
Meissner, M.
Podlesnyak, A.
Podgornykh, S. M.
TI Butterflylike specific heat, magnetocaloric effect, and itinerant
metamagnetism in (Er,Y)Co-2 compounds
SO PHYSICAL REVIEW B
LA English
DT Article
DE Curie temperature; entropy; erbium compounds; magnetocaloric effects;
metamagnetism; specific heat; spin fluctuations; yttrium compounds
ID HIGH MAGNETIC-FIELDS; ELECTRON METAMAGNETISM; SPIN FLUCTUATIONS; RCO(2)
COMPOUNDS; RCO2 COMPOUNDS; TRANSITION; TEMPERATURE; CAPACITY; SYSTEM;
ERCO2
AB The field-induced first-order phase transition in (Er1-xYx)Co-2 with the yttrium concentration x=0.45 is observed to be accompanied by a butterflylike behavior and significant irreversibility of the specific heat. The coefficient gamma of the T-linear specific heat decreases by similar to 48% under application and removal of a magnetic field up to 20 kOe. This behavior is attributed to the itinerant electron metamagnetism of Co 3d electrons. The isothermal magnetic entropy change Delta S-m in Er0.55Y0.45Co2 includes a large contribution associated with spin fluctuations induced by the f-d exchange interaction in the hybridized 3d-5d-electron subsystem. These spin fluctuations are suggested to contribute substantially to the magnetocaloric effect of the RCo2 type compounds. The maximal Delta S-m value observed for ErCo2 just above the Curie temperature is ascribed to the closeness of the T-C value to the spin-fluctuation temperature T-sf of itinerant Co 3d electrons. The nonmonotonous change in Delta S-m with the Curie temperature of (R1-xRxCo2)-Co-' compounds is explained by the temperature variation in the spin-fluctuation contribution to the magnetocaloric effect.
C1 [Baranov, N. V.; Proshkin, A. V.] Russian Acad Sci, Inst Met Phys, Ekaterinburg 620219, Russia.
[Baranov, N. V.; Proshkin, A. V.; Podgornykh, S. M.] Ural State Univ, Inst Phys & Appl Math, Ekaterinburg 620083, Russia.
[Czternasty, C.; Meissner, M.] Helmholtz Zentrum Berlin, D-14109 Berlin, Germany.
[Podlesnyak, A.] Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA.
RP Baranov, NV (reprint author), Russian Acad Sci, Inst Met Phys, Ekaterinburg 620219, Russia.
EM nikolai.baranov@usu.ru
RI Podlesnyak, Andrey/A-5593-2013; Podgornykh, Sergey/J-3583-2013;
Proshkin, Alexey/J-7180-2013; C, Y/G-5456-2010; Baranov,
Nikolai/J-5042-2013
OI Podlesnyak, Andrey/0000-0001-9366-6319; Podgornykh,
Sergey/0000-0002-4942-4862; Proshkin, Alexey/0000-0002-2631-6834;
Baranov, Nikolai/0000-0002-9720-5314
FU RAS [01.2.006 13391]; Department of Energy [DE-AC05-00OR22725]
FX This work was supported by the RAS Program (Project No. 01.2.006 13391).
ORNL/SNS is managed by UT-Battelle, LLC, for the U. S. Department of
Energy under Contract No. DE-AC05-00OR22725.
NR 53
TC 12
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U1 4
U2 31
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 18
AR 184420
DI 10.1103/PhysRevB.79.184420
PG 9
WC Physics, Condensed Matter
SC Physics
GA 451WI
UT WOS:000266501200073
ER
PT J
AU Bartal, G
Lerosey, G
Zhang, X
AF Bartal, Guy
Lerosey, Geoffroy
Zhang, Xiang
TI Subwavelength dynamic focusing in plasmonic nanostructures using time
reversal
SO PHYSICAL REVIEW B
LA English
DT Article
DE focusing; nanostructured materials; periodic structures; plasmonics
ID DIFFRACTION LIMIT; OPTICAL SUPERLENS; SCATTERING; REFRACTION; ARRAYS;
LIGHT
AB We employ time reversal for deep subwavelength focusing in plasmonic periodic nanostructures. The strong anisotropy enables propagating modes with very large transverse wave vector and moderate propagation constant, facilitating transformation of diffraction-limited plane waves to high-K Bloch waves in the plasmonic nanostructure. Time reversal is used to excite the waves in the nanostructure at the exact amplitude and phase to focus the incident light to dimensions well below the diffraction limit at any point in the structure, exemplifying a true subdiffractional confinement and resolution.
C1 [Bartal, Guy; Lerosey, Geoffroy; Zhang, Xiang] Univ Calif Berkeley, NSF, NSEC, Berkeley, CA 94720 USA.
[Zhang, Xiang] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA.
RP Zhang, X (reprint author), Univ Calif Berkeley, NSF, NSEC, 5130 Etcheverry Hall, Berkeley, CA 94720 USA.
EM xzhang@me.berkeley.edu
RI Zhang, Xiang/F-6905-2011
FU DARPA [HR0011-05-3-0002]; U.S. Army Research Office (ARO) MURI program
[50432-PH-MUR]; NSF [CMMI-0751621]
FX This work is supported by DARPA (Agreement No. HR0011-05-3-0002), the
U.S. Army Research Office (ARO) MURI program 50432-PH-MUR, and the NSF
under Grant No. CMMI-0751621. The authors thank Rupert Oulton and David
Pile for stimulating discussions.
NR 31
TC 44
Z9 44
U1 2
U2 13
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 20
AR 201103
DI 10.1103/PhysRevB.79.201103
PG 4
WC Physics, Condensed Matter
SC Physics
GA 451WL
UT WOS:000266501500003
ER
PT J
AU Begtrup, GE
Gannett, W
Meyer, JC
Yuzvinsky, TD
Ertekin, E
Grossman, JC
Zettl, A
AF Begtrup, Gavi E.
Gannett, Will
Meyer, Jannik C.
Yuzvinsky, Thomas D.
Ertekin, Elif
Grossman, Jeffrey C.
Zettl, Alex
TI Facets of nanotube synthesis: High-resolution transmission electron
microscopy study and density functional theory calculations
SO PHYSICAL REVIEW B
LA English
DT Article
DE carbon nanotubes; catalysts; density functional theory; diffusion; iron;
nanotechnology; transmission electron microscopy
ID AUGMENTED-WAVE METHOD; CARBON; GROWTH; SCALE; IRON
AB We report the presence of catalytically active facets on iron nanocrystals during carbon nanotube synthesis. Using real-time in situ high-resolution transmission electron microscopy, we observe the facets' formation and interaction with carbon feedstock and are able to infer carbon diffusion across the catalyst surface facilitating nanotube formation. The observations are supported by density functional theory calculations.
C1 [Begtrup, Gavi E.; Gannett, Will; Meyer, Jannik C.; Yuzvinsky, Thomas D.; Zettl, Alex] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Begtrup, Gavi E.; Gannett, Will; Meyer, Jannik C.; Yuzvinsky, Thomas D.; Zettl, Alex] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Yuzvinsky, Thomas D.; Grossman, Jeffrey C.; Zettl, Alex] Ctr Integrated Nanomech Syst, Berkeley, CA 94720 USA.
[Ertekin, Elif; Grossman, Jeffrey C.] Berkeley Nanosci & Nanoengn Inst, Berkeley, CA 94720 USA.
RP Begtrup, GE (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RI Meyer, Jannik/H-8541-2012; Ertekin, Elif/D-6764-2013; Zettl,
Alex/O-4925-2016;
OI Meyer, Jannik/0000-0003-4023-0778; Zettl, Alex/0000-0001-6330-136X;
Yuzvinsky, Thomas/0000-0001-5708-2877
FU (U. S.) Department of Energy [DE-AC02-05CH11231]; Miller Institute for
Basic Research in Science; NSF; Focus Center Research Program on
Materials, Structures, and Devices
FX This work was supported by the Director, Office of Energy Research,
Office of Basic Energy Sciences, Materials Sciences and Engineering
Division, of the (U. S.) Department of Energy under Contract No.
DE-AC02-05CH11231. A. Z. acknowledges support from the Miller Institute
for Basic Research in Science. W. G. acknowledges support from the NSF
Integrative Graduate Education and Research Traineeship (IGERT) Program.
J. C. G. and E. E. acknowledge funding by the Focus Center Research
Program on Materials, Structures, and Devices (FCRP/MSD). Computations
were performed at the National Energy Research Scientific Computing
Center.
NR 18
TC 23
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U1 0
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 20
AR 205409
DI 10.1103/PhysRevB.79.205409
PG 6
WC Physics, Condensed Matter
SC Physics
GA 451WL
UT WOS:000266501500090
ER
PT J
AU Caruso, AN
Pokhodnya, KI
Shum, WW
Ching, WY
Anderson, B
Bremer, MT
Vescovo, E
Rulis, P
Epstein, AJ
Miller, JS
AF Caruso, A. N.
Pokhodnya, Konstantin I.
Shum, William W.
Ching, W. Y.
Anderson, Bridger
Bremer, M. T.
Vescovo, E.
Rulis, Paul
Epstein, A. J.
Miller, Joel S.
TI Direct evidence of electron spin polarization from an organic-based
magnet: [Fe-II(TCNE)(NCMe)(2)][(FeCl4)-Cl-III]
SO PHYSICAL REVIEW B
LA English
DT Article
DE ab initio calculations; antiferromagnetic materials; density functional
theory; electron spin polarisation; exchange interactions (electron);
Fermi level; magnetic semiconductors; organic semiconductors;
photoemission
ID MOLECULE-BASED MAGNETS; SPINTRONICS; PHOTOEMISSION; TRANSITION; FILMS
AB Direct evidence of an organic-based magnet with a finite electron spin polarization at the Fermi edge is shown from spin-resolved photoemission of the [Fe-II(TCNE)(NCMe)(2)][(FeCl4)-Cl-III] organic-based magnet. The 23% majority-based spin polarization at the Fermi edge is observed at 80 K in zero applied field. Ab initio calculations at the density functional level (0 K) are in accord with a semiconductor with 100% majority-based electron spin polarization at the band edges, commensurate with our experimental results and model prediction for a half-semiconductor. Organic-based magnets may prove to be important for realizing polarized electron injection into semiconductors for magnetoelectronic applications.
C1 [Caruso, A. N.; Ching, W. Y.; Rulis, Paul] Univ Missouri, Dept Phys, Kansas City, MO 64110 USA.
[Pokhodnya, Konstantin I.; Shum, William W.; Miller, Joel S.] Univ Utah, Dept Chem, Salt Lake City, UT 84112 USA.
[Pokhodnya, Konstantin I.; Anderson, Bridger; Bremer, M. T.] N Dakota State Univ, Ctr Nanoscale Sci & Engn, Fargo, ND 58102 USA.
[Pokhodnya, Konstantin I.; Epstein, A. J.] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
[Pokhodnya, Konstantin I.; Epstein, A. J.] Ohio State Univ, Dept Chem, Columbus, OH 43210 USA.
[Vescovo, E.] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
EM carusoan@umkc.edu
RI Ching, Wai-Yim/B-4686-2009
OI Ching, Wai-Yim/0000-0001-7738-8822
FU NSF [EPS-0447679]; DOE [DE-FG02-86ER45271, DE-FG02-84DR45170,
DE-FG02-01ER45931]; AFOSR [F49620-03-1-01-75]
FX This work was supported in part by the NSF (Contract No. EPS-0447679),
the DOE (Contracts No. DE-FG02-86ER45271, No. DE-FG02-84DR45170, and No.
DE-FG02-01ER45931), and the AFOSR (Contract No. F49620-03-1-01-75).
NR 31
TC 8
Z9 8
U1 0
U2 10
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 19
AR 195202
DI 10.1103/PhysRevB.79.195202
PG 5
WC Physics, Condensed Matter
SC Physics
GA 451WJ
UT WOS:000266501300063
ER
PT J
AU Chanier, T
Virot, F
Hayn, R
AF Chanier, T.
Virot, F.
Hayn, R.
TI Chemical trend of exchange coupling in diluted magnetic II-VI
semiconductors: Ab initio calculations
SO PHYSICAL REVIEW B
LA English
DT Article
DE cobalt; conduction bands; exchange interactions (electron);
ferromagnetic materials; II-VI semiconductors; impurities; localised
states; magneto-optical effects; manganese; photoemission; semiconductor
doping; semimagnetic semiconductors; wide band gap semiconductors; zinc
compounds
ID DOPED ZNO; FERROMAGNETISM; METAL; SCATTERING; MN; SYSTEMS; ENERGY; FILMS
AB We have calculated the chemical trend of magnetic exchange parameters (J(dd), N alpha, and N beta) of Zn-based II-VI semiconductors ZnA (A=O, S, Se, and Te) doped with Co or Mn. We show that a proper treatment of electron correlations by the local spin-density approximation (LSDA)+U method leads to good agreement between experimental and theoretical values of the nearest-neighbor exchange coupling J(dd) between localized 3d spins in contrast to the LSDA method. The exchange couplings between localized spins and doped electrons in the conduction band N alpha are in good agreement with experiment as well. But the values for N beta (coupling to doped holes in the valence band) indicate a crossover from weak coupling (for A=Te and Se) to strong coupling (for A=O) and a localized hole state in ZnO:Mn. This hole localization explains the apparent discrepancy between photoemission and magneto-optical data for ZnO:Mn.
C1 [Chanier, T.; Virot, F.; Hayn, R.] Fac Sci & Tech St Jerome, Inst Mat Microelect & Nanosci Provence, F-13397 Marseille 20, France.
[Chanier, T.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Chanier, T (reprint author), Fac Sci & Tech St Jerome, Inst Mat Microelect & Nanosci Provence, Case 142, F-13397 Marseille 20, France.
RI Virot, Francois/H-4079-2012; Chanier, Thomas/F-2768-2011
OI Chanier, Thomas/0000-0002-8222-2154
FU [14182XB]
FX We thank Anatole Stepanov, Sergei Ryabchenko, and Roman Kuzian for
useful discussions. Financial support from the "Dnipro" program (Grant
No. 14182XB) is gratefully acknowledged.
NR 54
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U2 12
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 20
AR 205204
DI 10.1103/PhysRevB.79.205204
PG 8
WC Physics, Condensed Matter
SC Physics
GA 451WL
UT WOS:000266501500051
ER
PT J
AU Cheng, XM
Buchanan, KS
Divan, R
Guslienko, KY
Keavney, DJ
AF Cheng, X. M.
Buchanan, K. S.
Divan, R.
Guslienko, K. Y.
Keavney, D. J.
TI Nonlinear vortex dynamics and transient domains in ferromagnetic disks
SO PHYSICAL REVIEW B
LA English
DT Article
DE iron alloys; magnetic relaxation; magnetisation; micromagnetics; nickel
alloys; photoelectron microscopy; polarisation; vortices
AB We report a time-resolved imaging and micromagnetic simulation study of the relaxation dynamics of a magnetic vortex in the nonlinear regime. We use time-resolved photoemission electron microscopy and micromagnetic calculations to examine the emergence of nonlinear vortex dynamics in patterned Ni(80)Fe(20) disks in the limit of long field pulses. We show for core shifts beyond similar to 20%-25% of the disk radius, the initial motion is characterized by distortions of the vortex, a transient cross-tie wall state, and instabilities in the core polarization that influence the core trajectories.
C1 [Cheng, X. M.; Keavney, D. J.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Buchanan, K. S.] Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA.
[Buchanan, K. S.; Divan, R.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
[Guslienko, K. Y.] Univ Basque Country, Dept Mat Phys, San Sebastian 20080, Spain.
RP Cheng, XM (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RI Cheng, Xuemei/D-2388-2010;
OI Cheng, Xuemei/0000-0001-6670-4316; Buchanan, Kristen/0000-0003-0879-0038
FU U. S. Department of Energy [DE-AC02-06CH11357]; Ikerbasque Science
Foundation
FX The use of the Advanced Photon Source and the Center for Nanoscale
Materials at Argonne National Laboratory was supported by the U. S.
Department of Energy, Office of Science, Office of Basic Energy Sciences
under Contract No. DE-AC02-06CH11357. K. Y. G. acknowledges support by
the Ikerbasque Science Foundation.
NR 25
TC 22
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U1 0
U2 14
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 17
AR 172411
DI 10.1103/PhysRevB.79.172411
PG 4
WC Physics, Condensed Matter
SC Physics
GA 451WH
UT WOS:000266501100017
ER
PT J
AU Cooper, VR
Rabe, KM
AF Cooper, Valentino R.
Rabe, Karin M.
TI Enhancing piezoelectricity through polarization-strain coupling in
ferroelectric superlattices
SO PHYSICAL REVIEW B
LA English
DT Article
DE ab initio calculations; barium compounds; density functional theory;
dielectric polarisation; ferroelectric materials; lead compounds;
piezoelectricity; superlattices
ID ENHANCEMENT
AB Short-period ferroelectric/ferroelectric PbTiO3 (PTO)/BaTiO3 (BTO) superlattices are studied using density functional theory. Contrary to the trends in paraelectric/ferroelectric superlattices the polarization remains nearly constant for PTO concentrations below 50%. In addition, a significant decrease in the c/a ratio below the PTO values was observed. Using a first-principles superlattice model we predict an enhancement in the d(33) piezoelectric coefficient peaking at similar to 75% PTO concentration due to the different polarization-strain coupling in PTO and BTO layers. Further analysis reveals that these trends are bulk properties which are a consequence of the reduced P brought about by the polarization saturation in the BTO layers.
C1 [Cooper, Valentino R.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Rabe, Karin M.] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
RP Cooper, VR (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
EM coopervr@ornl.gov
RI Cooper, Valentino /A-2070-2012
OI Cooper, Valentino /0000-0001-6714-4410
FU ONR [N0014-00-1-0261]; DOE, Division of Materials Sciences and
Engineering
FX We would like to thank David Vanderbilt and Scott Beckman for valuable
discussions. This work was supported by ONR (Grant No. N0014-00-1-0261).
Part of this work was carried out at the Aspen Center for Physics. Work
at ORNL was supported by DOE, Division of Materials Sciences and
Engineering.
NR 21
TC 17
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U1 4
U2 25
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 18
AR 180101
DI 10.1103/PhysRevB.79.180101
PG 4
WC Physics, Condensed Matter
SC Physics
GA 451WI
UT WOS:000266501200001
ER
PT J
AU Del Genio, CI
Trenkler, J
Bassler, KE
Wochner, P
Haeffner, DR
Reiter, GF
Bai, JM
Moss, SC
AF Del Genio, Charo I.
Trenkler, Johann
Bassler, Kevin E.
Wochner, Peter
Haeffner, Dean R.
Reiter, George F.
Bai, Jianming
Moss, Simon C.
TI Depth-dependent critical behavior in V2H
SO PHYSICAL REVIEW B
LA English
DT Article
DE critical phenomena; dislocation density; order-disorder transformations;
vanadium compounds; X-ray scattering
ID 2 LENGTH SCALES; X-RAY-SCATTERING; CRITICAL FLUCTUATIONS;
NEUTRON-SCATTERING; PHASE-TRANSITIONS; SRTIO3; ORIGIN; DIFFRACTION;
HOLMIUM
AB Using x-ray diffuse scattering, we investigate the critical behavior of an order-disorder phase transition in a defective "skin layer" of V2H. In the skin layer, there exist walls of dislocation lines oriented normal to the surface. The density of dislocation lines within a wall decreases continuously with depth. We find that, because of this inhomogeneous distribution of defects, the transition effectively occurs at a depth-dependent local critical temperature. A depth-dependent scaling law is proposed to describe the corresponding critical ordering behavior.
C1 [Del Genio, Charo I.; Trenkler, Johann; Bassler, Kevin E.; Reiter, George F.; Moss, Simon C.] Univ Houston, Dept Phys, Houston, TX 77204 USA.
[Del Genio, Charo I.; Bassler, Kevin E.; Moss, Simon C.] Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA.
[Trenkler, Johann; Wochner, Peter] Max Planck Inst Met Res, D-70569 Stuttgart, Germany.
[Haeffner, Dean R.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Bai, Jianming] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Del Genio, CI (reprint author), Univ Houston, Dept Phys, 617 Sci & Res 1,4800 Calhoun Rd, Houston, TX 77204 USA.
RI Del Genio, Charo/F-7249-2010; Bai, Jianming/O-5005-2015
OI Del Genio, Charo/0000-0001-9958-017X;
FU NSF [DMR-0427538]; U. S. DOE, BES-DMS [W-31-109-ENG38]
FX The authors would like to thank R. Hempelmann for loading the crystal
used in these experiments and D. Lott, H. D. Carstanjen, P. C. Chow, D.
De Fontaine, J. W. Cahn, and R. Barabash for help in the experiment or
fruitful discussions. Furthermore, we thank G. Srajer and the beamline
personnel at the APS at Argonne National Laboratory for assistance
during the experiment. The work of C. I. D. G. and K. E. B. was
supported by the NSF through Grant No. DMR-0427538. S. C. M. gratefully
acknowledges the support of the Texas Center for Superconductivity of
the University of Houston (TSuH).The Advanced Photon Source is supported
by the U. S. DOE, BES-DMS, under Contract No. W-31-109-ENG38.
NR 24
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U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 18
AR 184113
DI 10.1103/PhysRevB.79.184113
PG 4
WC Physics, Condensed Matter
SC Physics
GA 451WI
UT WOS:000266501200042
ER
PT J
AU Densmore, JM
Das, P
Rovira, K
Blasius, TD
DeBeer-Schmitt, L
Jenkins, N
Paul, DM
Dewhurst, CD
Bud'ko, SL
Canfield, PC
Eskildsen, MR
AF Densmore, J. M.
Das, P.
Rovira, K.
Blasius, T. D.
DeBeer-Schmitt, L.
Jenkins, N.
Paul, D. McK.
Dewhurst, C. D.
Bud'ko, S. L.
Canfield, P. C.
Eskildsen, M. R.
TI Small-angle neutron scattering study of the vortex lattice in
superconducting LuNi2B2C
SO PHYSICAL REVIEW B
LA English
DT Article
DE boron compounds; flux-line lattice; lutetium compounds; neutron
diffraction; nickel compounds
ID FLUX-LINE-LATTICE; MAGNETIC-FIELD DISTRIBUTION; II SUPERCONDUCTORS;
MIXED-STATE; SINGLE-CRYSTALS; TEMPERATURE; YNI2B2C; CORE; TRANSITION;
DEPENDENCE
AB We present studies of the magnetic field distribution around the vortices in LuNi2B2C. Small-angle neutron scattering measurements of the vortex lattice (VL) in this material were extended to unprecedentedly large values of the scattering vector q, obtained both by using high magnetic fields to decrease the VL spacing and by using higher order reflections. A square VL, oriented with the nearest-neighbor direction along the crystalline [110] direction, was observed up to the highest measured field. The first-order VL form factor, parallel to F(q(10))parallel to, was found to decrease exponentially with increasing magnetic field. Measurements of the higher-order form factors, parallel to F(q(hk))parallel to, reveal a significant in-plane anisotropy and also allow for a real-space reconstruction of the VL field distribution.
C1 [Densmore, J. M.; Das, P.; Rovira, K.; Blasius, T. D.; DeBeer-Schmitt, L.; Eskildsen, M. R.] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
[Jenkins, N.] Univ Geneva, DPMC, CH-1211 Geneva 4, Switzerland.
[Paul, D. McK.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
[Dewhurst, C. D.] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France.
[Bud'ko, S. L.; Canfield, P. C.] Iowa State Univ, Dept Phys, Ames, IA 50011 USA.
[Bud'ko, S. L.; Canfield, P. C.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
[Rovira, K.] Florida Int Univ, Dept Phys, Miami, FL 33199 USA.
[Blasius, T. D.] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
RP Densmore, JM (reprint author), Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
EM eskildsen@nd.edu
RI Eskildsen, Morten/E-7779-2011; Das, Pinaki/C-2877-2012; Densmore,
John/G-1228-2011; Canfield, Paul/H-2698-2014; DeBeer-Schmitt,
Lisa/I-3313-2015
OI Densmore, John/0000-0003-2388-1413; DeBeer-Schmitt,
Lisa/0000-0001-9679-3444
FU National Science Foundation [DMR-0804887, PHY-0552843]; Alfred P. Sloan
Foundation; Department of Energy, Basic Energy Sciences
[DE-AC02-07CH11358]
FX We are grateful to Kazushige Machida, Masanori Ichioka, and Vladimir
Kogan for stimulating discussions, and to Hazuki Kawano- Furukawa and
Seiko Ohira- Kawamura for discussing their data on
YNi2B2C with us prior to publication. This work
was supported by the National Science Foundation through Grants No.
DMR-0804887 (J.M.D. and M.R.E) and No. PHY-0552843 (K. R. and T. D. B.).
M. R. E. acknowledges support by the Alfred P. Sloan Foundation. Work at
the Ames Laboratory was supported by the Department of Energy, Basic
Energy Sciences under Contract No. DE-AC02-07CH11358.
NR 46
TC 10
Z9 10
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 17
AR 174522
DI 10.1103/PhysRevB.79.174522
PG 7
WC Physics, Condensed Matter
SC Physics
GA 451WH
UT WOS:000266501100112
ER
PT J
AU Du, MH
Singh, DJ
AF Du, Mao-Hua
Singh, David J.
TI Hydrogen in anion vacancies of semiconductors
SO PHYSICAL REVIEW B
LA English
DT Article
DE density functional theory; Fermi level; hydrogen; II-VI semiconductors;
impurities; vacancies (crystal); wide band gap semiconductors; zinc
compounds
ID BONDS; GAN
AB Density-functional calculations show that, depending on the anion size, hydrogen in anion vacancies of various II-VI semiconductors can be either twofold or fourfold coordinated and has either amphoteric or shallow donor character. In general, the multicoordination of hydrogen in an anion vacancy is the indication of an anionic H, H(-) ion, in the relatively ionic environment. In more covalent semiconductors, H would form a single cation-H bond in the anion vacancy.
C1 [Du, Mao-Hua] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
Oak Ridge Natl Lab, Ctr Radiat Detect Mat & Syst, Oak Ridge, TN 37831 USA.
RP Du, MH (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RI Du, Mao-Hua/B-2108-2010; Singh, David/I-2416-2012
OI Du, Mao-Hua/0000-0001-8796-167X;
NR 29
TC 12
Z9 12
U1 0
U2 7
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 20
AR 205201
DI 10.1103/PhysRevB.79.205201
PG 6
WC Physics, Condensed Matter
SC Physics
GA 451WL
UT WOS:000266501500049
ER
PT J
AU Fister, TT
Nagle, KP
Vila, FD
Seidler, GT
Hamner, C
Cross, JO
Rehr, JJ
AF Fister, Timothy T.
Nagle, Kenneth P.
Vila, Fernando D.
Seidler, Gerald T.
Hamner, Christopher
Cross, Julie O.
Rehr, John J.
TI Intermediate-range order in water ices: Nonresonant inelastic x-ray
scattering measurements and real-space full multiple scattering
calculations
SO PHYSICAL REVIEW B
LA English
DT Article
DE ab initio calculations; electronic structure; ice; Raman spectra; water;
X-ray absorption spectra; X-ray scattering
ID DENSITY-FUNCTIONAL THEORY; HYDROGEN-BOND NETWORK; ABSORPTION
FINE-STRUCTURE; LIQUID WATER; RAMAN-SCATTERING;
PHOTOELECTRON-SPECTROSCOPY; EXCITATION SPECTROSCOPY;
ELECTRONIC-STRUCTURE; LOCAL-STRUCTURE; HIGH-PRESSURE
AB We report measurements of the nonresonant inelastic x-ray scattering (NRIXS) from the O 1s orbitals in ice Ih, and also report calculations of the corresponding spectra for ice Ih and several other phases of water ice. We find that the intermediate-energy fine structure may be calculated well using an ab initio real-space full multiple scattering approach and that it provides a strong fingerprint of the intermediate-range order for some ice phases. Both experiment and theory find that the intermediate-range fine structure, unlike the near-edge structure, is independent of momentum transfer (q) to very high q. These results have important consequences for future NRIXS measurements of high-pressure phases of ice.
C1 [Fister, Timothy T.; Nagle, Kenneth P.; Vila, Fernando D.; Seidler, Gerald T.; Hamner, Christopher; Rehr, John J.] Univ Washington, Dept Phys, Seattle, WA 98105 USA.
[Fister, Timothy T.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Hamner, Christopher] Washington State Univ, Dept Phys & Astron, Pullman, WA 99164 USA.
RP Seidler, GT (reprint author), Univ Washington, Dept Phys, Seattle, WA 98105 USA.
EM seidler@phys.washington.edu
RI Seidler, Gerald/I-6974-2012
FU DOE; Basic Energy Science; Office of Science [DE-FGE03-97ER45628,
W-31-109-ENG-38]; ONR [N00014-05-1-0843, DE-FG03-97ER5623]; NIH NCRR BTP
[RR-01209]; Summer Research Institute Program at the Pacific Northwest
National Laboratory; DOE Basic Energy Science, Office of Science
[DE-FG03-97ER45629]; University of Washington; Natural Sciences and
Engineering Research Council of Canad
FX This research was supported by DOE, Basic Energy Science, Office of
Science, Contracts No. DE-FGE03-97ER45628 and No. W-31-109-ENG-38, ONR
Grant No. N00014-05-1-0843, Grant No. DE-FG03-97ER5623, NIH NCRR BTP
Grant No. RR-01209 and the Summer Research Institute Program at the
Pacific Northwest National Laboratory. The operation of Sector 20
PNC-CAT/XOR is supported by DOE Basic Energy Science, Office of Science,
Contract No. DE-FG03-97ER45629, the University of Washington, and grants
from the Natural Sciences and Engineering Research Council of Canada.
Use of the Advanced Photon Source was supported by the U. S. Department
of Energy, Basic Energy Sciences, Office of Science, under Contract No.
W-31-109-Eng-38. We thank Aleksi Soininen, Ed Stern, Josh Kas, and Micah
Prange for stimulating discussions.
NR 108
TC 20
Z9 20
U1 0
U2 10
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 17
AR 174117
DI 10.1103/PhysRevB.79.174117
PG 7
WC Physics, Condensed Matter
SC Physics
GA 451WH
UT WOS:000266501100043
ER
PT J
AU Guo, HZ
Gupta, A
Varela, M
Pennycook, S
Zhang, JD
AF Guo, Haizhong
Gupta, Arunava
Varela, Maria
Pennycook, Stephen
Zhang, Jiandi
TI Local valence and magnetic characteristics of La2NiMnO6
SO PHYSICAL REVIEW B
LA English
DT Article
DE Curie temperature; electron energy loss spectra; ferromagnetism;
lanthanum compounds; magnetic circular dichroism; magnetic epitaxial
layers; scanning-transmission electron microscopy; superexchange
interactions; X-ray absorption spectra
ID RAY CIRCULAR-DICHROISM; PEROVSKITES
AB Epitaxial thin films of ordered double perovskite La2NiMnO6 have been studied by a combination of high-resolution scanning transmission electron microscopy, quantitative electron energy loss spectroscopy, x-ray absorption spectroscopy, and x-ray magnetic circular dichroism (XMCD) spectroscopy. Our results show the nominal oxidation states of Ni and Mn ions to be Ni2+ and Mn4+ thus the ferromagnetism in ground state is mainly due to Ni2+-O-Mn4+ superexchange interactions. In addition, short-range ferromagnetic correlations are observed above the Curie temperature (T-C similar to 280 K) from XMCD measurement, which are likely induced by antisite defects against long-range ordering of the Ni/Mn sublattice. The XMCD results also demonstrate that the Ni2+ and Mn4+ ions are ferromagnetically aligned but exhibit large differences in the spin and orbital contributions to their effective magnetic moments.
C1 [Gupta, Arunava] Univ Alabama, Dept Chem, Tuscaloosa, AL 35487 USA.
[Varela, Maria; Pennycook, Stephen] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Guo, Haizhong; Zhang, Jiandi] Florida Int Univ, Dept Phys, Miami, FL 33199 USA.
[Gupta, Arunava] Univ Alabama, Ctr Mat Informat Technol, Tuscaloosa, AL 35487 USA.
RP Guo, HZ (reprint author), Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
EM jiandiz@lsu.edu
RI Guo, Haizhong/C-9817-2011; Varela, Maria/H-2648-2012; Varela,
Maria/E-2472-2014
OI Varela, Maria/0000-0002-6582-7004
FU NSF [DMR-0346826]; ONR [N000140610226]; NSF NIRT [CMS-0609377]; Office
of Basic Energy Sciences, Division of Materials Sciences and Engineering
FX This work was supported by NSF under Grant No. DMR-0346826, ONR under
Grant No. N000140610226, and NSF NIRT under Grant No. CMS-0609377. The
research at ORNL was sponsored by the Office of Basic Energy Sciences,
Division of Materials Sciences and Engineering. The authors thank Y.
Takamura for helping us in the XAS and XMCD measurements and J. Luck for
specimen preparation for STEM.
NR 28
TC 26
Z9 26
U1 1
U2 26
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 17
AR 172402
DI 10.1103/PhysRevB.79.172402
PG 4
WC Physics, Condensed Matter
SC Physics
GA 451WH
UT WOS:000266501100008
ER
PT J
AU Khasanov, R
Kondo, T
Strassle, S
Heron, DOG
Kaminski, A
Keller, H
Lee, SL
Takeuchi, T
AF Khasanov, R.
Kondo, Takeshi
Straessle, S.
Heron, D. O. G.
Kaminski, A.
Keller, H.
Lee, S. L.
Takeuchi, Tsunehiro
TI Zero-field superfluid density in a d-wave superconductor evaluated from
muon-spin-rotation experiments in the vortex state
SO PHYSICAL REVIEW B
LA English
DT Article
DE bismuth compounds; d-wave superconductivity; high-temperature
superconductors; lanthanum compounds; lead compounds; mixed state; muon
probes; strontium compounds
ID II SUPERCONDUCTORS; PENETRATION DEPTH; DEPENDENCE; TEMPERATURE;
BI2.15SR1.85CACU2O8+DELTA; YBA2CU3O6.95; CROSSOVER; SYMMETRY; LATTICE
AB We present an approach that allows the reconstruction of the zero-field magnetic penetration depth lambda(0) based on the results of muon-spin-rotation (mu SR) experiments conducted in a superconductor in the vortex state. It was successfully applied to describe the mu SR experiments in optimally doped (BiPb)(2)(SrLa)(2)CuO6+delta (OP Bi2201). We found that in unconventional d-wave superconductors (such as OP Bi2201) only at relatively low magnetic fields [B/B-c2 less than or similar to 10(-3); B-c2 is the upper critical field] the effective penetration depth lambda(eff), obtained in mu SR experiment, is a good measure of lambda(0). The high-field data need to be evaluated accounting for both the nonlinear and the nonlocal corrections.
C1 [Khasanov, R.] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland.
[Kondo, Takeshi; Kaminski, A.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Kondo, Takeshi; Kaminski, A.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
[Kondo, Takeshi; Takeuchi, Tsunehiro] Nagoya Univ, Dept Crystalline Mat Sci, Nagoya, Aichi 4648603, Japan.
[Straessle, S.; Keller, H.] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland.
[Heron, D. O. G.; Lee, S. L.] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland.
[Takeuchi, Tsunehiro] Nagoya Univ, EcoTopia Sci Inst, Nagoya, Aichi 4648603, Japan.
RP Khasanov, R (reprint author), Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland.
EM rustem.khasanov@psi.ch
RI Lee, Stephen/G-9791-2016; Kondo, Takeshi/H-2680-2016;
OI Lee, Stephen/0000-0002-2020-3310; Khasanov, Rustem/0000-0002-4768-5524
FU Department of Energy, Basic Energy Sciences [DE-AC02-07CH11358]; Swiss
National Foundation (SNF)
FX This work was performed at the Swiss Muon Source (S mu S), Paul Scherrer
Institute (PSI, Switzerland). Work at the Ames Laboratory was supported
by the Department of Energy, Basic Energy Sciences under Contract No.
DE-AC02-07CH11358. The financial support of the Swiss National
Foundation (SNF) is gratefully acknowledged.
NR 32
TC 8
Z9 8
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 18
AR 180507
DI 10.1103/PhysRevB.79.180507
PG 4
WC Physics, Condensed Matter
SC Physics
GA 451WI
UT WOS:000266501200025
ER
PT J
AU Khomyakov, PA
Giovannetti, G
Rusu, PC
Brocks, G
van den Brink, J
Kelly, PJ
AF Khomyakov, P. A.
Giovannetti, G.
Rusu, P. C.
Brocks, G.
van den Brink, J.
Kelly, P. J.
TI First-principles study of the interaction and charge transfer between
graphene and metals
SO PHYSICAL REVIEW B
LA English
DT Article
DE charge exchange; chemisorption; density functional theory; doping;
electron transport theory; Fermi level; graphene; work function
ID MASSLESS DIRAC FERMIONS; AUGMENTED-WAVE METHOD; SCHOTTKY-BARRIER; WORK
FUNCTION; GRAPHITE; CARBON; SURFACES; JUNCTION; FILMS
AB Measuring the transport of electrons through a graphene sheet necessarily involves contacting it with metal electrodes. We study the adsorption of graphene on metal substrates using first-principles calculations at the level of density-functional theory. The bonding of graphene to Al, Ag, Cu, Au, and Pt (111) surfaces is so weak that its unique "ultrarelativistic" electronic structure is preserved. The interaction does, however, lead to a charge transfer that shifts the Fermi level by up to 0.5 eV with respect to the conical points. The crossover from p-type to n-type doping occurs for a metal with a work function similar to 5.4 eV, a value much larger than the work function of free-standing graphene, 4.5 eV. We develop a simple analytical model that describes the Fermi-level shift in graphene in terms of the metal substrate work function. Graphene interacts with and binds more strongly to Co, Ni, Pd, and Ti. This chemisorption involves hybridization between graphene p(z) states and metal d states that opens a band gap in graphene, and reduces its work function considerably. The supported graphene is effectively n-type doped because in a current-in-plane device geometry the work-function lowering will lead to electrons being transferred to the unsupported part of the graphene sheet.
C1 [Khomyakov, P. A.; Giovannetti, G.; Rusu, P. C.; Brocks, G.; Kelly, P. J.] Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands.
[Giovannetti, G.; van den Brink, J.] Leiden Univ, Inst Lorentz Theoret Phys, NL-2300 RA Leiden, Netherlands.
[van den Brink, J.] Radboud Univ Nijmegen, Inst Mol & Mat, NL-6525 AJ Nijmegen, Netherlands.
[van den Brink, J.] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
[van den Brink, J.] Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA.
[Khomyakov, P. A.; Giovannetti, G.; Rusu, P. C.; Brocks, G.; Kelly, P. J.] Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands.
RP Khomyakov, PA (reprint author), Univ Twente, Fac Sci & Technol, POB 217, NL-7500 AE Enschede, Netherlands.
RI van den Brink, Jeroen/E-5670-2011; Kelly, Paul/G-4210-2010; Khomyakov,
Petr/L-4550-2013; Giovannetti, Gianluca/L-4339-2013; Brocks,
Geert/B-7919-2015
OI van den Brink, Jeroen/0000-0001-6594-9610; Kelly,
Paul/0000-0001-9040-1868;
NR 71
TC 546
Z9 548
U1 65
U2 505
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 19
AR 195425
DI 10.1103/PhysRevB.79.195425
PG 12
WC Physics, Condensed Matter
SC Physics
GA 451WJ
UT WOS:000266501300124
ER
PT J
AU Li, JY
Jensen, TBS
Andersen, NH
Zarestky, JL
McCallum, RW
Chung, JH
Lynn, JW
Vaknin, D
AF Li, Jiying
Jensen, Thomas B. S.
Andersen, Niels H.
Zarestky, Jerel L.
McCallum, R. William
Chung, Jae-Ho
Lynn, Jeffrey W.
Vaknin, David
TI Tweaking the spin-wave dispersion and suppressing the incommensurate
phase in LiNiPO4 by iron substitution
SO PHYSICAL REVIEW B
LA English
DT Article
DE commensurate-incommensurate transformations; energy gap; exchange
interactions (electron); frustration; Heisenberg model; iron compounds;
lithium compounds; magnetic structure; magnetic transitions; neutron
diffraction; nickel compounds; spin Hamiltonians; spin waves
ID INELASTIC NEUTRON-SCATTERING; WEAK FERROMAGNETISM; MAGNETIC-PROPERTIES;
ANTIFERROMAGNETISM; TRANSFORMATION; ANISOTROPY
AB Elastic and inelastic neutron-scattering studies of Li(Ni1-xFex)PO4 single crystals reveal anomalous spin-wave dispersions along the crystallographic direction parallel to the characteristic wave vector of the magnetic incommensurate phase. The anomalous spin-wave dispersion (magnetic soft mode) indicates the instability of the Ising-type ground state that eventually evolves into the incommensurate phase as the temperature is raised. The pure LiNiPO4 system (x=0) undergoes a first-order magnetic phase transition from a long-range incommensurate phase to an antiferromagnetic (AFM) ground state at T-N=20.8 K. At 20% Fe concentrations, although the AFM ground state is to a large extent preserved as that of the pure system, the phase transition is second order, and the incommensurate phase is completely suppressed. Analysis of the dispersion curves using a Heisenberg spin Hamiltonian that includes interplane and in-plane nearest- and next-nearest-neighbor couplings reveals frustration due to strong competing interactions between nearest- and next-nearest-neighbor sites, consistent with the observed incommensurate structure. The Fe substitution only slightly lowers the extent of the frustration, sufficient to suppress the incommensurate phase. An energy gap in the dispersion curves gradually decreases with the increase in Fe content from similar to 2 meV for the pure system (x=0) to similar to 0.9 meV for x=0.2.
C1 [Li, Jiying; Zarestky, Jerel L.; McCallum, R. William; Vaknin, David] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
[Li, Jiying; Zarestky, Jerel L.; Vaknin, David] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Li, Jiying; Lynn, Jeffrey W.] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[Li, Jiying] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA.
[Jensen, Thomas B. S.; Andersen, Niels H.] Tech Univ Denmark, Mat Res Div, Riso DTU, DK-4000 Roskilde, Denmark.
[McCallum, R. William] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
[Chung, Jae-Ho] Korea Univ, Dept Phys, Seoul 136713, South Korea.
RP Vaknin, D (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
EM vaknin@ameslab.gov
RI Andersen, Niels/A-3872-2012; Vaknin, David/B-3302-2009
OI Vaknin, David/0000-0002-0899-9248
NR 37
TC 9
Z9 9
U1 0
U2 11
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 17
AR 174435
DI 10.1103/PhysRevB.79.174435
PG 7
WC Physics, Condensed Matter
SC Physics
GA 451WH
UT WOS:000266501100088
ER
PT J
AU Li, SL
Chen, Y
Chang, S
Lynn, JW
Li, LJ
Luo, YK
Cao, GH
Xu, ZA
Dai, PC
AF Li, Shiliang
Chen, Ying
Chang, Sung
Lynn, Jeffrey W.
Li, Linjun
Luo, Yongkang
Cao, Guanghan
Xu, Zhu'an
Dai, Pengcheng
TI Spin gap and magnetic resonance in superconducting BaFe1.9Ni0.1As2
SO PHYSICAL REVIEW B
LA English
DT Article
DE antiferrimagnetism; arsenic alloys; barium alloys; iron alloys; magnetic
resonance; neutron spectra; nickel alloys; photoemission;
superconducting energy gap; superconducting materials
ID IRON-BASED SUPERCONDUCTORS; TEMPERATURE SUPERCONDUCTOR;
NEUTRON-SCATTERING; BA0.6K0.4FE2AS2; EXCITATIONS; SPECTRA
AB We use neutron spectroscopy to determine the nature of the magnetic excitations in superconducting BaFe1.9Ni0.1As2(T-c=20 K). Above T-c the excitations are gapless and centered at the commensurate antiferromagnetic wave vector of the parent compound, while the intensity exhibits a sinusoidal modulation along the c axis. As the superconducting state is entered a spin gap gradually opens, whose magnitude tracks the T dependence of the superconducting gap as observed by angle-resolved photoemission. Both the spin-gap and magnetic-resonance energies are temperature and wave-vector dependent, but their ratio is the same within uncertainties. These results suggest that the spin resonance is a singlet-triplet excitation related to electron pairing and superconductivity.
C1 [Li, Shiliang; Dai, Pengcheng] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Chen, Ying; Chang, Sung; Lynn, Jeffrey W.] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[Li, Linjun; Luo, Yongkang; Cao, Guanghan; Xu, Zhu'an] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China.
[Dai, Pengcheng] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
RP Li, SL (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
EM daip@ornl.gov
RI Li, Shiliang/B-9379-2009; Cao, Guanghan/C-4753-2008; Dai, Pengcheng
/C-9171-2012
OI Dai, Pengcheng /0000-0002-6088-3170
FU U.S. DOE BES [DE-FG02-05ER46202]; NSF [DMR-0756568, DMR-0454672]
FX We thank Songxue Chi, Jun Zhao, and Leland Harriger for coaligning some
of the single crystals used in the present experiment. This work is
supported by the U.S. DOE BES under Grant No. DE-FG02-05ER46202, NSF
under Grant No. DMR-0756568, and in part by the U. S. DOE, Division of
Scientific User Facilities. The work at Zhejiang University is supported
by the NSF of China. This work utilized facilities supported in part by
the National Science Foundation under Agreement No. DMR-0454672.
NR 35
TC 56
Z9 56
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 17
AR 174527
DI 10.1103/PhysRevB.79.174527
PG 5
WC Physics, Condensed Matter
SC Physics
GA 451WH
UT WOS:000266501100117
ER
PT J
AU Luo, JW
Franceschetti, A
Zunger, A
AF Luo, J. W.
Franceschetti, A.
Zunger, A.
TI Nonmonotonic size dependence of the dark/bright exciton splitting in
GaAs nanocrystals
SO PHYSICAL REVIEW B
LA English
DT Article
DE Brillouin zones; conduction bands; exchange interactions (electron);
excitons; gallium arsenide; III-V semiconductors; pseudopotential
methods; wave functions
ID HOLE EXCHANGE INTERACTION; CDSE QUANTUM DOTS; FINE-STRUCTURE;
CONFINEMENT; DARK; SILICON; STATES; INP
AB The dark/bright exciton splitting Delta(X) in semiconductor nanocrystals is usually caused by electron-hole exchange interactions. Since the electron-hole wave-function overlap is enhanced by quantum confinement, it is generally assumed that Delta(X) increases monotonically as the quantum-dot size decreases. Using atomistic pseudopotential calculations, we show that in GaAs nanocrystals Delta(X) scales nonmonotonically with the nanocrystal size. By analyzing the nanocrystal wave functions in terms of contributions from different k points in the bulk Brillouin zone, we identify the origin of such nonmonotonic behavior in a transition of the lowest conduction-band wave function from Gamma like to X like as the nanocrystal radius decreases below 19 A. The nonmonotonicity arises because the long-range component of the electron-hole exchange interaction all but vanishes when the electron wave function becomes X like. We also show that the direct/indirect transition induced in GaAs nanocrystals by external pressure results in a sudden reduction in Delta(X).
C1 [Luo, J. W.; Franceschetti, A.; Zunger, A.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Luo, JW (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM alex_zunger@nrel.gov
RI LUO, JUN-WEI/A-8491-2010; Zunger, Alex/A-6733-2013; LUO,
JUNWEI/B-6545-2013
FU U.S. Department of Energy, Office of Science, Basic Energy Sciences
[DE-AC36-08GO28308]
FX This work was funded by the U.S. Department of Energy, Office of
Science, Basic Energy Sciences under Contract No. DE-AC36-08GO28308 to
NREL.
NR 17
TC 11
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U1 0
U2 16
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 20
AR 201301
DI 10.1103/PhysRevB.79.201301
PG 4
WC Physics, Condensed Matter
SC Physics
GA 451WL
UT WOS:000266501500012
ER
PT J
AU Magyar, RJ
AF Magyar, R. J.
TI Ground and excited-state fermions in a one-dimensional double-well:
Exact and density-functional solutions
SO PHYSICAL REVIEW B
LA English
DT Article
DE density functional theory; eigenvalues and eigenfunctions; excited
states; fermions; ground states; Hubbard model; hydrogen neutral
molecules; one-dimensional conductivity
ID ELECTRON-GAS; SYSTEMS; MODEL
AB Two of the most popular quantum-mechanical models of interacting fermions are compared to each other and to potentially exact solutions for a pair of contact-interacting fermions trapped in a one-dimensional (1D) double-well potential, a model of atoms in a quasi-1D optical lattice, or electrons of a hydrogen molecule in a strong magnetic field. An exact few-body Hamiltonian is solved numerically in momentum space yielding a highly correlated eigenspectrum. Additionally, approximate ground-state energies are obtained using both density-functional theory (DFT) functional and two-site Hubbard models. A 1D adiabatic local-density approximation kernel is constructed for use in time-dependent density-functional theory (TDDFT) and the resulting excited-state spectrum is compared to the exact and Hubbard results. DFT is shown to give accurate results for wells with small separations but fails to describe localization of opposite spin fermions to different sites. A locally cognizant density functional based on an effective local fermion number would provide a solution to this problem, and an approximate treatment presented here compares favorably to the exact and Hubbard results. The TDDFT excited-state spectrum is accurate in the small parameter regime with nonadiabatic effects accounting for any deviations. As expected, the ground-state Hubbard model outperforms DFT at large separations but breaks down at intermediate separations due to improper scaling to the united-atom limit. At strong coupling, both Hubbard and TDDFT methods fail to capture the appropriate energetics.
C1 [Magyar, R. J.] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
RP Magyar, RJ (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 27
TC 9
Z9 9
U1 1
U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 19
AR 195127
DI 10.1103/PhysRevB.79.195127
PG 14
WC Physics, Condensed Matter
SC Physics
GA 451WJ
UT WOS:000266501300056
ER
PT J
AU McQueen, TM
Klimczuk, T
Williams, AJ
Huang, Q
Cava, RJ
AF McQueen, T. M.
Klimczuk, T.
Williams, A. J.
Huang, Q.
Cava, R. J.
TI Stoichiometry, spin fluctuations, and superconductivity in LaNiPO
SO PHYSICAL REVIEW B
LA English
DT Article
DE band structure; fluctuations in superconductors; lanthanum compounds;
nickel compounds; specific heat; spin fluctuations; stoichiometry
ID LAYERED QUATERNARY COMPOUND; CRYSTAL-STRUCTURE; MAGNETIC-PROPERTIES;
PHASE-DIAGRAM; HEAT
AB Superconductivity in LaNiPO is disrupted by small (similar to 5%) amounts of nonstoichiometry on the lanthanum site, even though the electronic contribution to the heat capacity increases with increasing nonstoichiometry. All samples also exhibit specific-heat anomalies consistent with the presence of ferromagnetic spin fluctuations (T(sf)approximate to 14 K). Comparison of layered nickel phosphide and nickel borocarbide superconductors reveals different structure-property correlations in the two families.
C1 [McQueen, T. M.; Williams, A. J.; Cava, R. J.] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA.
[Klimczuk, T.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Klimczuk, T.] Gdansk Univ Technol, Fac Appl Phys & Math, PL-80952 Gdansk, Poland.
[Huang, Q.] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA.
RP McQueen, TM (reprint author), Princeton Univ, Dept Chem, Princeton, NJ 08544 USA.
RI Klimczuk, Tomasz/M-1716-2013
OI Klimczuk, Tomasz/0000-0003-2602-5049
FU National Science Foundation Graduate Research Program; Department of
Energy, Division of Basic Energy Sciences [DE-FG02-98ER45706]
FX T. M. M. gratefully acknowledges support of the National Science
Foundation Graduate Research Program. The work at Princeton was
supported by the Department of Energy, Division of Basic Energy
Sciences, under Grant No. DE-FG02-98ER45706.
NR 34
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U1 3
U2 20
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 17
AR 172502
DI 10.1103/PhysRevB.79.172502
PG 4
WC Physics, Condensed Matter
SC Physics
GA 451WH
UT WOS:000266501100020
ER
PT J
AU Moore, RG
Lumsden, MD
Stone, MB
Zhang, JD
Chen, Y
Lynn, JW
Jin, R
Mandrus, D
Plummer, EW
AF Moore, R. G.
Lumsden, M. D.
Stone, M. B.
Zhang, Jiandi
Chen, Y.
Lynn, J. W.
Jin, R.
Mandrus, D.
Plummer, E. W.
TI Phonon softening and anomalous mode near the x(c)=0.5 quantum critical
point in Ca2-xSrxRuO4
SO PHYSICAL REVIEW B
LA English
DT Article
DE calcium compounds; critical points; doping; phonon dispersion relations;
soft modes; solid-state phase transformations; strontium compounds
ID STRUCTURAL PHASE-TRANSITIONS; MOTT TRANSITION; SOFT-PHONON; LA2CUO4;
SUPERCONDUCTIVITY; CA2-XSR(X)RUO4; SR2IRO4
AB Inelastic neutron scattering is used to measure the temperature-dependent phonon dispersion in Ca2-xSrxRuO4 (x=0.4,0.6). The in-plane Sigma(4) octahedral tilt mode softens significantly at the zone boundary of the high-temperature tetragonal (HTT) I4(1)/acd structure as the temperature approaches the transition to a low-temperature orthorhombic (LTO) Pbca phase. This behavior is similar to that in La2CuO4, but an inelastic feature that is not found in the cuprate is present. An anomalous phonon mode is observed at energy transfers greater than the Sigma(4), albeit with similar dispersion. This anomalous phonon mode never softens below similar to 5 meV, even for temperatures below the HTT-LTO transition. This mode is attributed to the presence of intrinsic structural disorder within the I4(1)/acd tetragonal structure of the doped ruthenate.
C1 [Lumsden, M. D.; Stone, M. B.] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
[Zhang, Jiandi] Florida Int Univ, Dept Phys, Miami, FL 33199 USA.
[Chen, Y.; Lynn, J. W.] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[Jin, R.; Mandrus, D.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Moore, R. G.; Jin, R.; Mandrus, D.; Plummer, E. W.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RP Moore, RG (reprint author), SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA.
RI Stone, Matthew/G-3275-2011; Mandrus, David/H-3090-2014; Lumsden,
Mark/F-5366-2012
OI Stone, Matthew/0000-0001-7884-9715; Lumsden, Mark/0000-0002-5472-9660
FU NSF [DMR-0346826, DMR-0353108, DMR-0451163]; DOE [DE-FG02-04ER46125];
DOE DMS; ORAU faculty summer research program; Scientific User
Facilities Division, Office of Basic Energy Sciences, DOE; Division of
Materials Sciences and Engineering, Office of Basic Energy Sciences, DOE
[DE-AC05-00OR22725]
FX We thank I. A. Sergienko for helpful discussions. This work was
supported by NSF Grants No. DMR-0346826, No. DMR-0353108, and No.
DMR-0451163; DOE Grant No. DE-FG02-04ER46125; DOE DMS; and ORAU faculty
summer research program. A portion of this research at Oak Ridge
National Laboratory's High Flux Isotope Reactor was sponsored by the
Scientific User Facilities Division, Office of Basic Energy Sciences,
DOE. The work at Oak Ridge National Laboratory was supported through the
Division of Materials Sciences and Engineering, Office of Basic Energy
Sciences, DOE, under Contract No. DE-AC05-00OR22725.
NR 25
TC 0
Z9 0
U1 3
U2 17
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 17
AR 172301
DI 10.1103/PhysRevB.79.172301
PG 4
WC Physics, Condensed Matter
SC Physics
GA 451WH
UT WOS:000266501100005
ER
PT J
AU Nath, R
Singh, Y
Johnston, DC
AF Nath, R.
Singh, Yogesh
Johnston, D. C.
TI Magnetic, thermal, and transport properties of layered arsenides
BaRu2As2 and SrRu2As2
SO PHYSICAL REVIEW B
LA English
DT Article
DE barium compounds; electrical resistivity; magnetic susceptibility;
magnetic transitions; ruthenium compounds; specific heat; strontium
compounds; superconducting materials
ID QUATERNARY COMPOUND; SUPERCONDUCTIVITY; EARTH
AB The magnetic, thermal, and transport properties of polycrystalline BaRu2As2 and SrRu2As2 samples with the ThCr2Si2 structure were investigated by means of magnetic susceptibility chi(T), electrical resistivity rho(T), and heat capacity C-p(T) measurements. The temperature (T) dependence of rho indicates metallic character for both compounds with residual resistivity ratios rho(310 K)/rho(2 K) of 17 and 5 for the Ba and Sr compounds, respectively. The C-p(T) results reveal a low-T Sommerfeld coefficient gamma=4.9(1) and 4.1(1) mJ/mol K-2 and Debye temperature Theta(D)=271(7) and 271(4) K for the Ba and Sr compounds, respectively. The chi(T) was found to be diamagnetic with a small absolute value for both compounds. No transitions were found for BaRu2As2 above 1.8 K. The chi(T) data for SrRu2As2 exhibit a cusp at similar to 200 K, possibly an indication of a structural and/or magnetic transition. We discuss the properties of BaRu2As2 and SrRu2As2 in the context of other ThCr2Si2-type and ZrCuSiAs-type transition metal pnictides.
C1 [Nath, R.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
RP Nath, R (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
RI Nath, Ramesh/C-9345-2011; singh, yogesh/F-7160-2016
FU Department of Energy-Basic Energy Sciences [DE-AC02-07CH11358.]
FX Work at the Ames Laboratory was supported by the Department of
Energy-Basic Energy Sciences under Contract No. DE-AC02-07CH11358.
NR 45
TC 23
Z9 23
U1 4
U2 25
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 17
AR 174513
DI 10.1103/PhysRevB.79.174513
PG 6
WC Physics, Condensed Matter
SC Physics
GA 451WH
UT WOS:000266501100103
ER
PT J
AU Pieper, O
Lake, B
Daoud-Aladine, A
Reehuis, M
Prokes, K
Klemke, B
Kiefer, K
Yan, JQ
Niazi, A
Johnston, DC
Honecker, A
AF Pieper, O.
Lake, B.
Daoud-Aladine, A.
Reehuis, M.
Prokes, K.
Klemke, B.
Kiefer, K.
Yan, J. Q.
Niazi, A.
Johnston, D. C.
Honecker, A.
TI Magnetic structure and interactions in the quasi-one-dimensional
antiferromagnet CaV2O4
SO PHYSICAL REVIEW B
LA English
DT Article
DE antiferrimagnetism; calcium compounds; exchange interactions (electron);
frustration; magnetic structure; neutron diffraction; thermomagnetic
effects
ID DIFFRACTION; VANADITE
AB CaV2O4 is a spin-1 antiferromagnet, where the magnetic vanadium ions have an orbital degree of freedom and are arranged on quasi-one-dimensional zigzag chains. The first- and second-neighbor vanadium separations are approximately equal suggesting frustrated antiferromagnetic exchange interactions. High-temperature susceptibility and single-crystal neutron-diffraction measurements are used to deduce the dominant exchange paths and orbital configurations. The results suggest that at high temperatures CaV2O4 behaves as a Haldane chain, but at low temperatures, it is a spin-1 ladder. These two magnetic structures are explained by different orbital configurations and show how orbital ordering can drive a system from one exotic spin Hamiltonian to another.
C1 [Pieper, O.; Lake, B.; Reehuis, M.; Prokes, K.; Klemke, B.; Kiefer, K.] Helmholtz Zentrum Berlin Mat & Energie HZB, D-14109 Berlin, Germany.
[Pieper, O.; Lake, B.] Tech Univ Berlin, Inst Festkorperphys, D-10623 Berlin, Germany.
[Daoud-Aladine, A.] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
[Reehuis, M.] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany.
[Yan, J. Q.; Niazi, A.; Johnston, D. C.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
[Yan, J. Q.; Niazi, A.; Johnston, D. C.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Honecker, A.] Univ Gottingen, Inst Theoret Phys, D-37077 Gottingen, Germany.
RP Pieper, O (reprint author), Helmholtz Zentrum Berlin Mat & Energie HZB, Glienicker Str 100, D-14109 Berlin, Germany.
EM oliver.pieper@helmholtz-berlin.de
RI Honecker, Andreas/A-7941-2008; Kiefer, Klaus/J-3544-2013; Klemke,
Bastian/J-4746-2013; Prokes, Karel/J-5438-2013; Reehuis,
Manfred/J-3383-2013
OI Honecker, Andreas/0000-0001-6383-3200; Kiefer,
Klaus/0000-0002-5178-0495; Lake, Bella/0000-0003-0034-0964; Klemke,
Bastian/0000-0003-4560-6025; Prokes, Karel/0000-0002-7034-1738; Reehuis,
Manfred/0000-0002-6461-4074
FU Deutsche Forschungsgemeinschaft [UL 164/4, HO 2325/4-1]; U. S. DOE
[DE-AC02-07CH11358]
FX We thank D. Khomskii and P. G. Radealli for their advice and R. J.
McQueeney for supporting the crystal growth. M. R. and A. H. acknowledge
funding from Deutsche Forschungsgemeinschaft (Grants No. UL 164/4 and
No. HO 2325/4-1). Work at Ames was supported by the U. S. DOE (Contract
No. DE-AC02-07CH11358).
NR 26
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U1 3
U2 31
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 18
AR 180409
DI 10.1103/PhysRevB.79.180409
PG 4
WC Physics, Condensed Matter
SC Physics
GA 451WI
UT WOS:000266501200014
ER
PT J
AU Pirogov, AN
Park, JG
Ermolenko, AS
Korolev, AV
Kuchin, AG
Lee, S
Choi, YN
Park, J
Ranot, M
Yi, J
Gerasimov, EG
Dorofeev, YA
Vokhmyanin, AP
Podlesnyak, AA
Swainson, IP
AF Pirogov, A. N.
Park, J. -G.
Ermolenko, A. S.
Korolev, A. V.
Kuchin, A. G.
Lee, Seongsu
Choi, Y. N.
Park, Junghwan
Ranot, Mahipal
Yi, Junghwan
Gerasimov, E. G.
Dorofeev, Yu. A.
Vokhmyanin, A. P.
Podlesnyak, A. A.
Swainson, I. P.
TI TbxEr1-xNi5 compounds: An ideal model system for competing Ising-XY
anisotropy energies
SO PHYSICAL REVIEW B
LA English
DT Article
DE doping profiles; erbium alloys; Ising model; magnetic anisotropy;
magnetic moments; magnetic structure; magnetic susceptibility; magnetic
transitions; neutron diffraction; nickel alloys; space groups; specific
heat; terbium alloys; X-Y model
ID MAGNETIC PHASE-TRANSITIONS; RANDOMLY MIXED MAGNETS; MULTICRITICAL
POINTS; NEUTRON-DIFFRACTION; SPIN ANISOTROPIES; ORDER PARAMETERS;
SINGLE-CRYSTAL; RANDOM MIXTURE; ALLOYS; DIAGRAMS
AB We have studied TbxEr1-xNi5 (x=0, 0.1, 0.2, 0.3, 0.4, 0.6, 0.8, 0.925, and 1.0) compounds by using several experimental techniques such as ac-susceptibility, heat-capacity, and neutron-diffraction measurements. All the compounds are found to crystallize in the CaCu5-type structure with space group P6/mmm. The a axis shows a linear increase with Tb concentration, whereas the c axis remains almost unchanged over the whole doping range. Our neutron-diffraction studies revealed that samples for 0 <= x <= 0.8 have a commensurate magnetic structure with k=0, whereas the two samples on the Tb-rich phase (x=0.925 and 1.0) have an incommensurate structure. Of particular interest is that individual Tb and Er moments keep their mutually orthogonal arrangement seen at the end-member compositions over the whole doping range, due to very strong magnetic anisotropy of single-ion nature. We have established a complete magnetic x-T phase diagram of TbxEr1-xNi5 to find that two straight lines of the ordering of the Tb and Er subsystems are persistently seen, which intersect at a tetracritical point.
C1 [Pirogov, A. N.; Park, J. -G.; Lee, Seongsu; Park, Junghwan; Ranot, Mahipal; Yi, Junghwan] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea.
[Pirogov, A. N.; Ermolenko, A. S.; Korolev, A. V.; Kuchin, A. G.; Gerasimov, E. G.; Dorofeev, Yu. A.; Vokhmyanin, A. P.] Russian Acad Sci, Inst Met Phys, Ekaterinburg 620041, Russia.
[Park, J. -G.; Park, Junghwan] Sungkyunkwan Univ, Dept Energy Sci, Suwon 440746, South Korea.
[Park, J. -G.] Seoul Natl Univ, Ctr Strongly Correlated Mat Res, Seoul 151712, South Korea.
[Lee, Seongsu; Choi, Y. N.] Korea Atom Energy Res Inst, Div Neutron Sci, Taejon 305600, South Korea.
[Podlesnyak, A. A.] Swiss Fed Inst Technol, Neutron Scattering Lab, CH-5232 Villigen, Switzerland.
[Podlesnyak, A. A.] Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
[Podlesnyak, A. A.] Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA.
[Swainson, I. P.] Chalk River Labs, NRC, Chalk River, ON K0J 1J0, Canada.
RP Pirogov, AN (reprint author), Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea.
EM pirogov05@gmail.com; jgpark@skku.edu
RI Podlesnyak, Andrey/A-5593-2013; Gerasimov, Evgeny/J-3599-2013;
Ermolenko, Alexander/J-3529-2013; Vokhmyanin, Alexandr/J-5536-2013;
Pirogov, Alexander/K-8115-2013; Park, Je Geun/K-8571-2013; Kuchin,
Anatoly/L-1388-2013; Alexander, Korolev/K-3036-2013
OI Podlesnyak, Andrey/0000-0001-9366-6319; Gerasimov,
Evgeny/0000-0002-1975-705X; Ermolenko, Alexander/0000-0003-0422-3271;
Vokhmyanin, Alexandr/0000-0001-6076-4668; Pirogov,
Alexander/0000-0001-7321-1245; Kuchin, Anatoly/0000-0002-8216-5276;
Alexander, Korolev/0000-0002-5104-3997
FU RAS Program [01.2.006 13394]; Quantum physics of condensed matter
[13/24]; SCOPES 2005-2008 [IB7420-110849]; Korea Research Foundation
[KRF-2008-220-C00012]; Korea Science and Engineering Foundation
[R17-2008-033-01000-0, R31-2008-000-10029-0]; CNRF project. Experiments
at the KAERI; U.S. Department of Energy [DE-AC05-00OR22725]
FX We acknowledge K. A. McEwen for useful comments. Work at the Institute
of Metal Physics was performed with supports of RAS Program (Project No.
01.2.006 13394),Quantum physics of condensed matter (Project No. 13/24),
and SCOPES 2005-2008 (Grant No. IB7420-110849). Work at SungKyunKwan
University was supported by the Korea Research Foundation (Grant No.
KRF-2008-220-C00012), the Korea Science and Engineering Foundation
(Grants No. R17-2008-033-01000-0 and No. R31-2008-000-10029-0), and the
CNRF project. Experiments at the KAERI were carried out through Neutron
Science 21 program. ORNL/SNS is managed by UT-Battlelle, LLC, for the
U.S. Department of Energy under Contract No. DE-AC05-00OR22725.
NR 40
TC 11
Z9 11
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 17
AR 174412
DI 10.1103/PhysRevB.79.174412
PG 9
WC Physics, Condensed Matter
SC Physics
GA 451WH
UT WOS:000266501100065
ER
PT J
AU Qi, YN
Zhu, JX
Ting, CS
AF Qi, Yunong
Zhu, Jian-Xin
Ting, C. S.
TI Validity of the equation-of-motion approach to the Kondo problem in the
large-N limit
SO PHYSICAL REVIEW B
LA English
DT Article
DE Anderson model; exchange interactions (electron); Green's function
methods; Kondo effect; magnetic impurities; spin-orbit interactions
ID DILUTE MAGNETIC-ALLOYS; DEGENERATE ANDERSON MODEL; RENORMALIZATION-GROUP
APPROACH; SELF-CONSISTENT SOLUTION; NARROW CONDUCTION BANDS; LOCALIZED
CORRELATIONS; STATIC PROPERTIES; FIELD; SUSCEPTIBILITY; EXPANSION
AB The Anderson impurity model for Kondo problem is investigated for arbitrary spin-orbital degeneracy N of the magnetic impurity by the equation-of-motion method (EOM). By employing a different decoupling scheme, a set of self-consistent equations for the one-particle Green's function is derived and numerically solved in the large-N approximation. For the particle-hole symmetric Anderson model with finite Coulomb interaction U, we show that the Kondo resonance at the impurity site exists for all N >= 2. The approach removes the pathology in the standard EOM for N=2 and has the same level of applicability as noncrossing approximation. For N=2, an exchange field splits the Kondo resonance into only two peaks as predicted by a more rigorous numerical renormalization-group method. The temperature dependence of the Kondo resonance peak is also discussed.
C1 [Qi, Yunong; Ting, C. S.] Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA.
[Zhu, Jian-Xin] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Qi, YN (reprint author), Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA.
EM yqi@mail.uh.edu; jxzhu@lanl.gov; csting@mail.uh.edu
OI Zhu, Jianxin/0000-0001-7991-3918
NR 30
TC 10
Z9 10
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 20
AR 205110
DI 10.1103/PhysRevB.79.205110
PG 5
WC Physics, Condensed Matter
SC Physics
GA 451WL
UT WOS:000266501500037
ER
PT J
AU Reboredo, FA
Hood, RQ
Kent, PRC
AF Reboredo, F. A.
Hood, R. Q.
Kent, P. R. C.
TI Self-healing diffusion quantum Monte Carlo algorithms: Direct reduction
of the fermion sign error in electronic structure calculations
SO PHYSICAL REVIEW B
LA English
DT Article
DE band structure; fermion systems; ground states; Monte Carlo methods;
wave functions
ID WAVE-FUNCTIONS; MOLECULES; SYSTEMS; GAS
AB We develop a formalism and present an algorithm for optimization of the trial wave function used in fixed-node diffusion quantum Monte Carlo (DMC) methods. The formalism is based on the DMC mixed estimator of the ground-state probability density. We take advantage of a basic property of the walker configuration distribution generated in a DMC calculation, to (i) project out a multideterminant expansion of the fixed-node ground-state wave function and (ii) to define a cost function that relates the fixed-node ground-state and the noninteracting trial wave functions. We show that (a) locally smoothing out the kink of the fixed-node ground-state wave function at the node generates a new trial wave function with better nodal structure and (b) we argue that the noise in the fixed-node wave function resulting from finite sampling plays a beneficial role, allowing the nodes to adjust toward the ones of the exact many-body ground state in a simulated annealing-like process. Based on these principles, we propose a method to improve both single determinant and multideterminant expansions of the trial wave function. The method can be generalized to other wave-function forms such as pfaffians. We test the method in a model system where benchmark configuration-interaction calculations can be performed and most components of the Hamiltonian are evaluated analytically. Comparing the DMC calculations with the exact solutions, we find that the trial wave function is systematically improved. The overlap of the optimized trial wave function and the exact ground state converges to 100% even starting from wave functions orthogonal to the exact ground state. Similarly, the DMC total energy and density converges to the exact solutions for the model. In the optimization process we find an optimal noninteracting nodal potential of density-functional-like form whose existence was predicted in a previous publication [Phys. Rev. B 77, 245110 (2008)]. Tests of the method are extended to a model system with a conventional Coulomb interaction where we show we can obtain the exact Kohn-Sham effective potential from the DMC data.
C1 [Reboredo, F. A.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Hood, R. Q.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Kent, P. R. C.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Reboredo, FA (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RI Kent, Paul/A-6756-2008; Reboredo, Fernando/B-8391-2009
OI Kent, Paul/0000-0001-5539-4017;
FU Division of Materials Sciences; Division of Scientific User Facilities
U. S. Department of Energy; U. S. Department of Energy
[DE-AC52-07NA27344]
FX Research performed at the Materials Science and Technology Division and
the Center of Nanophase Material Sciences at Oak Ridge National
Laboratory was sponsored by the Division of Materials Sciences and the
Division of Scientific User Facilities U. S. Department of Energy. This
work was performed under the auspices of the U. S. Department of Energy
by Lawrence Livermore National Laboratory under Contract No.
DE-AC52-07NA27344. The authors would like thank J. Kim for discussions
and C. Umrigar for clarifications related to the use of Eq. (19).
NR 35
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U1 1
U2 9
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 19
AR 195117
DI 10.1103/PhysRevB.79.195117
PG 15
WC Physics, Condensed Matter
SC Physics
GA 451WJ
UT WOS:000266501300046
ER
PT J
AU Sacchetti, A
Condron, CL
Gvasaliya, SN
Pfuner, F
Lavagnini, M
Baldini, M
Toney, MF
Merlini, M
Hanfland, M
Mesot, J
Chu, JH
Fisher, IR
Postorino, P
Degiorgi, L
AF Sacchetti, A.
Condron, C. L.
Gvasaliya, S. N.
Pfuner, F.
Lavagnini, M.
Baldini, M.
Toney, M. F.
Merlini, M.
Hanfland, M.
Mesot, J.
Chu, J. -H.
Fisher, I. R.
Postorino, P.
Degiorgi, L.
TI Pressure-induced quenching of the charge-density-wave state in
rare-earth tritellurides observed by x-ray diffraction
SO PHYSICAL REVIEW B
LA English
DT Article
DE cerium alloys; charge density waves; high-pressure effects; lanthanum
alloys; lattice constants; tellurium alloys; X-ray diffraction
AB We report an x-ray diffraction study on the charge-density-wave (CDW) LaTe(3) and CeTe(3) compounds as a function of pressure. We extract the lattice constants and the CDW modulation wave vector. We observe that the intensity of the CDW satellite peaks tend to zero with increasing pressure, thus providing direct evidence for a pressure-induced quenching of the CDW phase. Our findings further support the equivalence between chemical and applied pressures in RTe(3), put forward by our previous optical investigations, but reveal some subtle differences. We offer a possible explanation for these differences.
C1 [Sacchetti, A.; Pfuner, F.; Lavagnini, M.; Degiorgi, L.] ETH, Festkorperphys Lab, CH-8093 Zurich, Switzerland.
[Condron, C. L.; Toney, M. F.] Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
[Gvasaliya, S. N.; Mesot, J.] ETH, Neutron Scattering Lab, CH-5232 Villigen, Switzerland.
[Gvasaliya, S. N.; Mesot, J.] Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
[Baldini, M.; Postorino, P.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
[Baldini, M.; Postorino, P.] Univ Roma La Sapienza, CNR, INFM Coherentia, I-00185 Rome, Italy.
[Merlini, M.; Hanfland, M.] European Synchrotron Radiat Facil, F-38043 Grenoble, France.
[Chu, J. -H.; Fisher, I. R.] Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA.
[Chu, J. -H.; Fisher, I. R.] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA.
RP Sacchetti, A (reprint author), ETH, Festkorperphys Lab, CH-8093 Zurich, Switzerland.
FU Swiss National Foundation for the Scientific Research; NCCR MaNEP pool;
(U.S.) Department of Energy, Office of Basic Energy Sciences
[DE-AC02-76SF00515]
FX The authors wish to thank R. Monnier for fruitful discussions. This work
was supported by the Swiss National Foundation for the Scientific
Research as well as by the NCCR MaNEP pool and also by the (U.S.)
Department of Energy, Office of Basic Energy Sciences under Contract No.
DE-AC02-76SF00515. Portions of this research were carried out at the
Stanford Synchrotron Radiation Laboratory, a national user facility
operated by Stanford University on behalf of the U. S. Department of
Energy, Office of Basic Energy Sciences.
NR 20
TC 18
Z9 18
U1 4
U2 15
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 20
AR 201101
DI 10.1103/PhysRevB.79.201101
PG 4
WC Physics, Condensed Matter
SC Physics
GA 451WL
UT WOS:000266501500001
ER
PT J
AU Sasmal, K
Lv, B
Tang, ZJ
Chen, F
Xue, YY
Lorenz, B
Guloy, AM
Chu, CW
AF Sasmal, K.
Lv, B.
Tang, Z. J.
Chen, F.
Xue, Y. Y.
Lorenz, B.
Guloy, A. M.
Chu, C. W.
TI Unusual doping dependence of superconductivity in NayFeAs
SO PHYSICAL REVIEW B
LA English
DT Article
DE annealing; arsenic alloys; doping; iron alloys; sodium alloys;
stoichiometry; superconducting materials; superconducting transitions
AB Superconductivity and phase relationships were explored in the Na-Fe-As system. The PbFCl-type 111 phase is stable only within a Na stoichiometry range of 1.00 to similar to 0.85, and exhibits bulk superconductivity within an even narrower range around 0.90 in Na0.9FeAs. In particular, stoichiometric NaFeAs is not a bulk superconductor. The onset of the superconducting transition varies in a totally different way and the highest T-c occurs in multiphase samples with a nominal composition of Na:Fe:As=0.5:1:1, where the superconductive volume-fraction is almost zero. Such doping dependency is rather surprising and in disagreement with most expectations.
C1 [Sasmal, K.; Chen, F.; Xue, Y. Y.; Lorenz, B.; Chu, C. W.] Univ Houston, Dept Phys, Houston, TX 77204 USA.
[Sasmal, K.; Lv, B.; Tang, Z. J.; Chen, F.; Xue, Y. Y.; Lorenz, B.; Guloy, A. M.; Chu, C. W.] Univ Houston, TCSUH, Houston, TX 77204 USA.
[Lv, B.; Tang, Z. J.; Guloy, A. M.] Univ Houston, Dept Chem, Houston, TX 77204 USA.
[Chu, C. W.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Chu, C. W.] Hong Kong Univ Sci & Technol, Hong Kong, Hong Kong, Peoples R China.
RP Sasmal, K (reprint author), Univ Houston, Dept Phys, Houston, TX 77204 USA.
RI Lv, Bing/E-3485-2010
FU T. L. L. Temple Foundation; John J. and Rebecca Moores Endowment; State
of Texas through the Texas Center for Superconductivity; U.S. Air Force
Office of Scientific Research; Lawrence Berkeley Laboratory; Office of
Science, Office of Basic Energy Sciences, Division of Materials Sciences
and Engineering of the U.S. Department of Energy [DE-AC03-76SF00098];
NSF [CHE-0616805]; Robert A. Welch Foundation
FX This work is supported in part by the T. L. L. Temple Foundation, the
John J. and Rebecca Moores Endowment, the State of Texas through the
Texas Center for Superconductivity, the U.S. Air Force Office of
Scientific Research, and at Lawrence Berkeley Laboratory by the
Director, Office of Science, Office of Basic Energy Sciences, Division
of Materials Sciences and Engineering of the U.S. Department of Energy
under Contract No. DE-AC03-76SF00098. A. M. G., Z.T. and B. L.
acknowledge the support from the NSF (Grant No. CHE-0616805) and the
Robert A. Welch Foundation.
NR 16
TC 19
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U1 3
U2 19
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 18
AR 184516
DI 10.1103/PhysRevB.79.184516
PG 5
WC Physics, Condensed Matter
SC Physics
GA 451WI
UT WOS:000266501200101
ER
PT J
AU Sefat, AS
Bud'ko, SL
Canfield, PC
AF Sefat, Athena S.
Bud'ko, Sergey L.
Canfield, Paul C.
TI Properties of RRe2Al10 (R=Y, Gd-Lu) crystals
SO PHYSICAL REVIEW B
LA English
DT Article
DE aluminium alloys; antiferromagnetic materials; crystal growth from
solution; crystal symmetry; dysprosium alloys; erbium alloys;
ferromagnetic materials; gadolinium alloys; high-temperature effects;
holmium alloys; lutetium alloys; magnetic moments; magnetic
susceptibility; magnetisation; paramagnetism; rhenium alloys; specific
heat; terbium alloys; thulium alloys; X-ray diffraction; ytterbium
alloys; yttrium alloys
ID PARAMAGNETIC-SUSCEPTIBILITY; CACR2AL10-TYPE STRUCTURE;
MAGNETIC-PROPERTIES; RMN4AL8; FIELD; HEAT; SPIN; PR; MN; LA
AB Large single crystals of rare-earth rhenium aluminide RRe2Al10, with R=Y, and Gd-Lu were grown out of an Al-rich solution. Single crystal x-ray diffraction data confirmed the orthorhombic Cmcm structure for all members: R=Gd-Dy with TbRe2Al10-structure type (formula unit per cell Z=8); R=Y, and Ho-Lu with LuRe2Al10-structure type (Z=12). There is no evidence of a localized 3d electron moment in R=Y and Lu; R=Yb is nonmagnetic down to 1.8 K, but develops an enhanced electronic specific heat of similar to 95 mJ mol(-1) K-2. Ordering temperatures range from ferromagnetic order in R=Gd with T-c=7.2(1) K, antiferromagnetic order in R=Tb at T-N=5.0(3) K, to R=Dy, Ho, and Er giving magnetic ordering temperatures of T-mag=1.7(1), <= 0.4, and 1.1(2) K, respectively. All compounds have effective moments close in value to that of free R3+ at high temperatures.
C1 [Sefat, Athena S.; Bud'ko, Sergey L.; Canfield, Paul C.] Iowa State Univ, Dept Phys & Astron, Ames Lab, Ames, IA 50011 USA.
RP Sefat, AS (reprint author), Iowa State Univ, Dept Phys & Astron, Ames Lab, Ames, IA 50011 USA.
RI Canfield, Paul/H-2698-2014; Sefat, Athena/R-5457-2016
OI Sefat, Athena/0000-0002-5596-3504
NR 20
TC 3
Z9 3
U1 0
U2 10
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 17
AR 174429
DI 10.1103/PhysRevB.79.174429
PG 11
WC Physics, Condensed Matter
SC Physics
GA 451WH
UT WOS:000266501100082
ER
PT J
AU Shu, L
MacLaughlin, DE
Beyermann, WP
Heffner, RH
Morris, GD
Bernal, OO
Callaghan, FD
Sonier, JE
Yuhasz, WM
Frederick, NA
Maple, MB
AF Shu, Lei
MacLaughlin, D. E.
Beyermann, W. P.
Heffner, R. H.
Morris, G. D.
Bernal, O. O.
Callaghan, F. D.
Sonier, J. E.
Yuhasz, W. M.
Frederick, N. A.
Maple, M. B.
TI Penetration depth, multiband superconductivity, and absence of
muon-induced perturbation in superconducting PrOs4Sb12
SO PHYSICAL REVIEW B
LA English
DT Article
DE antimony alloys; heavy fermion superconductors; muon probes; osmium
alloys; penetration depth (superconductivity); praseodymium alloys
ID CRYSTAL ELECTRIC-FIELD; SPIN-ROTATION; II SUPERCONDUCTORS;
MAGNETIC-FIELD; PRNI5; SR; EXCITATIONS; STATE; MU(+); NMR
AB Transverse-field muon spin rotation (TF-mu SR) experiments in the heavy-fermion superconductor PrOs4Sb12(T-c=1.85 K) suggest that the superconducting penetration depth lambda(T) is temperature independent at low temperatures, consistent with a gapped quasiparticle excitation spectrum. In contrast, radio frequency inductive measurements yield a stronger temperature dependence of lambda(T), indicative of point nodes in the gap. Muon Knight-shift measurements in the normal state of PrOs4Sb12 suggest that the perturbing effect of the muon charge on the neighboring Pr3+ crystalline electric field is negligibly small and therefore is unlikely to cause the difference between the TF-mu SR and rf results. The discrepancy appears to be related to multiband superconductivity in PrOs4Sb12.
C1 [Shu, Lei; MacLaughlin, D. E.; Beyermann, W. P.] Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA.
[Heffner, R. H.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Morris, G. D.] TRIUMF, Vancouver, BC V6T 2A3, Canada.
[Bernal, O. O.] Calif State Univ Los Angeles, Dept Phys & Astron, Los Angeles, CA 90032 USA.
[Callaghan, F. D.; Sonier, J. E.] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada.
[Shu, Lei; Yuhasz, W. M.; Frederick, N. A.; Maple, M. B.] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
[Yuhasz, W. M.; Frederick, N. A.; Maple, M. B.] Univ Calif San Diego, Inst Pure & Appl Phys Sci, La Jolla, CA 92093 USA.
RP Shu, L (reprint author), Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
RI Yuhasz, William/C-9418-2009; Shu, Lei/E-7524-2012
FU U. S. NSF [0422674, 0604015, 0335173]; Canadian NSERC; CIAR (Burnaby);
(U.S.) DOE [DE-FG-02-04ER46105]
FX We are grateful for technical assistance from the TRIUMF Centre for
Molecular and Materials Science during the experiments. This work was
supported in part by the U. S. NSF under Grant Nos. 0422674 (Riverside),
0604015 (Los Angeles ), and 0335173 (SanDiego), by the Canadian NSERC
and CIAR (Burnaby), and by the (U.S.) DOE under Grant No.
DE-FG-02-04ER46105 (San Diego). Work at Los Alamos was performed under
the auspices of the (U.S.) DOE.
NR 59
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U1 1
U2 16
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 17
AR 174511
DI 10.1103/PhysRevB.79.174511
PG 10
WC Physics, Condensed Matter
SC Physics
GA 451WH
UT WOS:000266501100101
ER
PT J
AU Singh, DJ
AF Singh, D. J.
TI Properties of KCo2As2 and alloys with Fe and Ru: Density functional
calculations
SO PHYSICAL REVIEW B
LA English
DT Article
DE arsenic alloys; cobalt alloys; density functional theory; electronic
structure; Fermi surface; iron alloys; potassium alloys; ruthenium
alloys; superconductivity
ID BAAL4 THCR2SI2 STRUCTURE; UNIT-CELL DIMENSIONS; RARE-EARTH PHASES; IRON;
SUPERCONDUCTIVITY; SILICON; COBALT
AB Electronic-structure calculations are presented for KCo2As2 and alloys with KFe2As2 and KRu2As2. These materials show electronic structures characteristic of coherent alloys with a similar Fermi surface structure to that of the Fe-based superconductors when the d-electron count is near 6 per transition metal. However, they are less magnetic than the corresponding Fe compounds. These results are discussed in relation to superconductivity.
C1 Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Singh, DJ (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RI Singh, David/I-2416-2012
FU Department of Energy, Division of Materials Sciences and Engineering
FX This work was supported by the Department of Energy, Division of
Materials Sciences and Engineering.
NR 29
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U1 5
U2 24
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 17
AR 174520
DI 10.1103/PhysRevB.79.174520
PG 4
WC Physics, Condensed Matter
SC Physics
GA 451WH
UT WOS:000266501100110
ER
PT J
AU Steger, M
Yang, A
Karaiskaj, D
Thewalt, MLW
Haller, EE
Ager, JW
Cardona, M
Riemann, H
Abrosimov, NV
Gusev, AV
Bulanov, AD
Kaliteevskii, AK
Godisov, ON
Becker, P
Pohl, HJ
AF Steger, M.
Yang, A.
Karaiskaj, D.
Thewalt, M. L. W.
Haller, E. E.
Ager, J. W., III
Cardona, M.
Riemann, H.
Abrosimov, N. V.
Gusev, A. V.
Bulanov, A. D.
Kaliteevskii, A. K.
Godisov, O. N.
Becker, P.
Pohl, H. -J.
TI Shallow impurity absorption spectroscopy in isotopically enriched
silicon
SO PHYSICAL REVIEW B
LA English
DT Article
DE binding energy; boron; elemental semiconductors; excited states; ground
states; impurity absorption spectra; impurity states; infrared spectra;
phosphorus; silicon; spectral line breadth; spectral line broadening
ID PRECISE DETERMINATION; EXCITATION-SPECTRA; HIGH-RESOLUTION;
SINGLE-CRYSTAL; PHONON; STATES; DONORS; SI-28; LINES; PHOTOLUMINESCENCE
AB Inhomogeneous broadening due to isotopic randomness in natural Si has been shown to cause a broadening of many of the ground-state to excited-state infrared-absorption transitions of the shallow donor phosphorus and acceptor boron. Previously, it had been thought that the observed linewidths of shallow impurity transitions in silicon were at their fundamental lifetime limit. We report improved high-resolution infrared-absorption studies of these transitions in new samples of isotopically enriched (28)Si, (29)Si, and (30)Si. Some of the transitions in (28)Si show the narrowest linewidths ever reported for shallow donor and acceptor absorption transitions, and many higher excited states are now observed. The improved samples of (29)Si and (30)Si result in revised values for the dependence of shallow donor and acceptor binding energies on the average Si mass.
C1 [Steger, M.; Yang, A.; Karaiskaj, D.; Thewalt, M. L. W.] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada.
[Haller, E. E.; Ager, J. W., III] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Cardona, M.] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany.
[Riemann, H.; Abrosimov, N. V.] IKZ, D-12489 Berlin, Germany.
[Gusev, A. V.; Bulanov, A. D.] RAS, IChHPS, Nizhnii Novgorod 603000, Russia.
[Kaliteevskii, A. K.; Godisov, O. N.] Sci & Tech Ctr Centrotech, St Petersburg 198096, Russia.
[Becker, P.] Phys Tech Bundesanstalt, D-38116 Braunschweig, Germany.
[Pohl, H. -J.] VITCON Projectconsult GmbH, D-07743 Jena, Germany.
[Haller, E. E.; Ager, J. W., III] LBNL, Berkeley, CA 94720 USA.
RP Steger, M (reprint author), Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada.
EM thewalt@sfu.ca
OI Ager, Joel/0000-0001-9334-9751
FU NSERC
FX We acknowledge NSERC for financial support, and thank B. Pajot for
several useful discussions.
NR 29
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U2 14
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 20
AR 205210
DI 10.1103/PhysRevB.79.205210
PG 7
WC Physics, Condensed Matter
SC Physics
GA 451WL
UT WOS:000266501500057
ER
PT J
AU Swanson, M
Haraldsen, JT
Fishman, RS
AF Swanson, M.
Haraldsen, J. T.
Fishman, R. S.
TI Critical anisotropies of a geometrically frustrated triangular-lattice
antiferromagnet
SO PHYSICAL REVIEW B
LA English
DT Article
DE antiferromagnetic materials; copper compounds; exchange interactions
(electron); frustration; ground states; magnetic anisotropy; magnetic
transitions; spin waves
ID HEISENBERG-ANTIFERROMAGNET; PHASE-DIAGRAM; CUFEO2; STATE
AB This work examines the critical anisotropy required for the local stability of the collinear ground states of a geometrically frustrated triangular-lattice antiferromagnet (TLA). Using a Holstein-Primakoff expansion, we calculate the spin-wave frequencies for the one-, two-, three-, four-, and eight-sublattice (SL) ground states of a TLA with up to third neighbor interactions. Local stability requires that all spin-wave frequencies are real and positive. The two-, four-, and eight-SL phases break up into several regions where the critical anisotropy is a different function of the exchange parameters. We find that the critical anisotropy is a continuous function everywhere except across the two-SL/three-SL and three-SL/four-SL phase boundaries, where the three-SL phase has the higher critical anisotropy.
C1 [Swanson, M.; Haraldsen, J. T.; Fishman, R. S.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Swanson, M.] N Dakota State Univ, Fargo, ND 58105 USA.
RP Swanson, M (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RI Haraldsen, Jason/B-9809-2012; Fishman, Randy/C-8639-2013
OI Haraldsen, Jason/0000-0002-8641-5412;
NR 19
TC 11
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U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 18
AR 184413
DI 10.1103/PhysRevB.79.184413
PG 6
WC Physics, Condensed Matter
SC Physics
GA 451WI
UT WOS:000266501200066
ER
PT J
AU Tanatar, MA
Kreyssig, A
Nandi, S
Ni, N
Bud'ko, SL
Canfield, PC
Goldman, AI
Prozorov, R
AF Tanatar, M. A.
Kreyssig, A.
Nandi, S.
Ni, N.
Bud'ko, S. L.
Canfield, P. C.
Goldman, A. I.
Prozorov, R.
TI Direct imaging of the structural domains in the iron pnictides
AFe(2)As(2) (A=Ca,Sr,Ba)
SO PHYSICAL REVIEW B
LA English
DT Article
DE arsenic alloys; barium alloys; calcium alloys; crystal structure;
high-temperature superconductors; iron alloys; magnetic transitions;
optical microscopy; solid-state phase transformations; strontium alloys;
superconducting transition temperature; twinning; X-ray diffraction
ID SUPERCONDUCTIVITY; YBA2CU3O7-X
AB The parent compounds of recently discovered iron-arsenide superconductors, AFe(2)As(2) with alkaline earth A=Ca,Sr,Ba, undergo simultaneous structural and magnetic phase transitions at a temperature T-SM. Using a combination of polarized light microscopy and spatially resolved high-energy synchrotron x-ray diffraction we show that the orthorhombic distortion leads to the formation of 45 degrees-type structural domains in all parent compounds. Domains penetrate through the sample thickness in the c direction and are not affected by crystal imperfections such as growth terraces. The domains form regular stripe patterns in the plane with a characteristic dimension of 10-50 mu m. The direction of the stripes is fixed with respect to the tetragonal (100) and (010) directions but can change by 90 degrees on thermal cycling through the transition. This domain pattern may have profound implications for intrinsic disorder and anisotropy of iron arsenides.
C1 [Tanatar, M. A.; Kreyssig, A.; Nandi, S.; Ni, N.; Bud'ko, S. L.; Canfield, P. C.; Goldman, A. I.; Prozorov, R.] Ames Lab, Ames, IA 50011 USA.
[Kreyssig, A.; Nandi, S.; Ni, N.; Bud'ko, S. L.; Canfield, P. C.; Goldman, A. I.; Prozorov, R.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
RP Prozorov, R (reprint author), Ames Lab, Ames, IA 50011 USA.
EM prozorov@ameslab.gov
RI Prozorov, Ruslan/A-2487-2008; Canfield, Paul/H-2698-2014
OI Prozorov, Ruslan/0000-0002-8088-6096;
FU Department of Energy-Basic Energy Sciences [DEAC02-07CH11358]; U. S. DOE
[DEAC02-06CH11357]; Alfred P. Sloan Foundation
FX We thank Doug Robinson for the support of the high-energy x-ray
measurements. Work at the Ames Laboratory and at the MUCAT sector was
supported by the Department of Energy-Basic Energy Sciences under
Contract No. DEAC02-07CH11358. The use of the Advanced Photon Source was
supported by the U. S. DOE under Contract No. DEAC02-06CH11357. M. A. T.
acknowledges continuing cross-appointment with the Institute of Surface
Chemistry, National Ukrainian Academy of Sciences. R. P. acknowledges
support from Alfred P. Sloan Foundation.
NR 26
TC 96
Z9 96
U1 1
U2 18
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 18
AR 180508
DI 10.1103/PhysRevB.79.180508
PG 4
WC Physics, Condensed Matter
SC Physics
GA 451WI
UT WOS:000266501200026
ER
PT J
AU Tiago, ML
Reboredo, FA
AF Tiago, Murilo L.
Reboredo, Fernando A.
TI Controlling the gap of fullerene microcrystals by applying pressure:
Role of many-body effects
SO PHYSICAL REVIEW B
LA English
DT Article
DE energy gap; excited states; excitons; fullerene compounds; high-pressure
effects; many-body problems; optical constants
ID SOLID C-60; OPTICAL-SPECTRA; DOPED C-60; EXCITATIONS; CUBANE;
SUPERCONDUCTIVITY; CARBON; PHASE; C60
AB We studied theoretically the optical properties of C(60) fullerene microcrystals as a function of hydrostatic pressure with first-principles many-body theories. Calculations of the electronic properties were done in the GW approximation. We computed electronic excited states in the crystal by diagonalizing the Bethe-Salpeter equation. Our results confirmed the existence of bound excitons in the crystal. Both the electronic gap and optical gap decrease continuously and nonlinearly as pressure of up to 6 GPa is applied. As a result, the absorption spectrum shows strong redshift. We also obtained that "negative" pressure shows the opposite behavior: the gaps increase and the optical spectrum shifts toward the blue end of the spectrum. Negative pressure can be realized by adding cubane (C(8)H(8)) or other molecules with similar size to the interstitials of the microcrystal. For the moderate lattice distortions studied here, we found that the optical properties of fullerene microcrystals with intercalated cubane are similar to the ones of an expanded undoped microcrystal. Based on these findings, we propose doped C(60) as an active element in piezo-optical devices.
C1 [Tiago, Murilo L.; Reboredo, Fernando A.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Tiago, ML (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RI Reboredo, Fernando/B-8391-2009
FU National Energy Research Scientific Computing Center
FX We would like to thank E. Schwegler, T. Oguitsu, and H. Whitley for
discussions. Research sponsored by the Division of Materials Sciences
and Engineering BES, U. S. DOE under contract with UT- Battelle, LLC.
Computational support was provided by the National Energy Research
Scientific Computing Center.
NR 33
TC 3
Z9 3
U1 1
U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 19
AR 195410
DI 10.1103/PhysRevB.79.195410
PG 7
WC Physics, Condensed Matter
SC Physics
GA 451WJ
UT WOS:000266501300109
ER
PT J
AU van Heumen, E
Muhlethaler, E
Kuzmenko, AB
Eisaki, H
Meevasana, W
Greven, M
van der Marel, D
AF van Heumen, E.
Muhlethaler, E.
Kuzmenko, A. B.
Eisaki, H.
Meevasana, W.
Greven, M.
van der Marel, D.
TI Optical determination of the relation between the electron-boson
coupling function and the critical temperature in high-T-c cuprates
SO PHYSICAL REVIEW B
LA English
DT Article
DE boson systems; carrier density; electron-phonon interactions;
high-temperature superconductors; optical conductivity; phase diagrams;
superconducting transition temperature
ID NORMAL-STATE; SUPERCONDUCTORS; CONDUCTIVITY; BI2SR2CACU2O8+DELTA;
SPECTRA; METALS
AB We take advantage of the connection between the free-carrier optical conductivity and the glue function in the normal state, to reconstruct from the infrared optical conductivity the glue spectrum of ten different high-T-c cuprates revealing a robust peak in the 50-60 meV range and a broad continuum at higher energies for all measured charge-carrier concentrations and temperatures up to 290 K. We observe that the strong-coupling formalism accounts fully for the known strong temperature dependence of the optical spectra of the high-T-c cuprates, except for strongly underdoped samples. We observe a correlation between the doping trend of the experimental glue spectra and the critical temperature. The data obtained on the overdoped side of the phase diagram conclusively exclude the electron-phonon coupling as the main source of superconducting pairing.
C1 [van Heumen, E.; Muhlethaler, E.; Kuzmenko, A. B.; van der Marel, D.] Univ Geneva, Dept Phys Mat Condensee, CH-1211 Geneva 4, Switzerland.
[Eisaki, H.] AIST, Nanoelect Res Inst, Tsukuba, Ibaraki 3058568, Japan.
[Meevasana, W.; Greven, M.] Stanford Univ, Dept Appl Phys Sci, Stanford, CA 94305 USA.
[Meevasana, W.; Greven, M.] Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA.
RP van Heumen, E (reprint author), Univ Geneva, Dept Phys Mat Condensee, Quai Ernest Ansermet 24, CH-1211 Geneva 4, Switzerland.
RI van der Marel, Dirk/G-4618-2012
OI van der Marel, Dirk/0000-0001-5266-9847
NR 32
TC 73
Z9 73
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 18
AR 184512
DI 10.1103/PhysRevB.79.184512
PG 7
WC Physics, Condensed Matter
SC Physics
GA 451WI
UT WOS:000266501200097
ER
PT J
AU Wilkins, SB
Di Matteo, S
Beale, TAW
Joly, Y
Mazzoli, C
Hatton, PD
Bencok, P
Yakhou, F
Brabers, VAM
AF Wilkins, S. B.
Di Matteo, S.
Beale, T. A. W.
Joly, Y.
Mazzoli, C.
Hatton, P. D.
Bencok, P.
Yakhou, F.
Brabers, V. A. M.
TI Critical reexamination of resonant soft x-ray Bragg forbidden
reflections in magnetite
SO PHYSICAL REVIEW B
LA English
DT Article
DE crystal structure; iron compounds; X-ray diffraction; X-ray scattering
ID VERWEY TRANSITION; CHARGE; SUPERCONDUCTORS; SCATTERING; DICHROISM
AB Magnetite, Fe(3)O(4), displays a highly complex low-temperature crystal structure that may be charge and orbitally ordered. Many of the recent experimental claims of such ordering rely on resonant soft x-ray diffraction at the oxygen K and iron L edges. We have reexamined this system and undertaken soft x-ray diffraction experiments on a high-quality single crystal. Contrary to previous claims in the literature, we show that the intensity observed at the Bragg forbidden (001/2)(c) reflection can be explained purely in terms of the low-temperature structural displacements around the resonant atoms. This does not necessarily mean that magnetite is not charge or orbitally ordered but rather that the present sensitivity of resonant soft x-ray experiments does not allow conclusive demonstration of such ordering.
C1 [Wilkins, S. B.] Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA.
[Di Matteo, S.] Univ Rennes 1, Equipe Phys Surfaces & Interfaces, Inst Phys Rennes, CNRS,UMR 6251, F-35042 Rennes, France.
[Beale, T. A. W.; Hatton, P. D.] Univ Durham, Dept Phys, Durham DH1 3LE, England.
[Joly, Y.] CNRS, Inst Neel, F-38042 Grenoble 09, France.
[Joly, Y.] Univ Grenoble 1, F-38042 Grenoble 09, France.
[Mazzoli, C.; Bencok, P.; Yakhou, F.] European Synchrotron Radiat Facil, F-38043 Grenoble 9, France.
[Brabers, V. A. M.] Eindhoven Univ Technol, Dept Phys, NL-5600 MB Eindhoven, Netherlands.
RP Wilkins, SB (reprint author), Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA.
RI Mazzoli, Claudio/J-4360-2012; Hatton, Peter/J-8445-2014
FU (U.S.) Department of Energy [DE-AC02-98CH1-886]; EPSRC-GB
FX Work at Brookhaven was supported by the (U.S.) Department of Energy
under Contract No. DE-AC02-98CH1-886. S. B. W. would like to thank J.P.
Hill for critical reading of the manuscript and S. R. Bland for helpful
discussions. P. D. H. wishes to acknowledge EPSRC-GB for support.
NR 21
TC 17
Z9 17
U1 3
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 20
AR 201102
DI 10.1103/PhysRevB.79.201102
PG 4
WC Physics, Condensed Matter
SC Physics
GA 451WL
UT WOS:000266501500002
ER
PT J
AU Wilson, SD
Yamani, Z
Rotundu, CR
Freelon, B
Bourret-Courchesne, E
Birgeneau, RJ
AF Wilson, Stephen D.
Yamani, Z.
Rotundu, C. R.
Freelon, B.
Bourret-Courchesne, E.
Birgeneau, R. J.
TI Neutron diffraction study of the magnetic and structural phase
transitions in BaFe2As2
SO PHYSICAL REVIEW B
LA English
DT Article
DE antiferromagnetic materials; arsenic alloys; barium alloys; iron alloys;
Ising model; magnetic structure; magnetic transitions; neutron
diffraction
ID HIGH-TEMPERATURE SUPERCONDUCTIVITY; DENSITY-WAVE ORDER; ISING-MODEL;
ZERO-FIELD; DIAGRAM
AB We present the results of an investigation of both the magnetic and structural phase transitions in a high quality single crystalline sample of the undoped iron pnictide compound BaFe2As2. Both phase transitions are characterized via neutron diffraction measurements which reveal simultaneous, continuous magnetic and structural orderings with no evidence of hysteresis, consistent with a single second-order phase transition. The onset of long-range antiferromagnetic order can be described by a simple power-law dependence phi(T)(2)proportional to(1-T/T-N)(2 beta) with beta=0.103 +/- 0.018; a value near the beta=0.125 expected for a two-dimensional Ising system. Biquadratic coupling between the structural and magnetic order parameters is also inferred along with evidence of three-dimensional critical scattering in this system.
C1 [Wilson, Stephen D.; Rotundu, C. R.; Bourret-Courchesne, E.; Birgeneau, R. J.] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Yamani, Z.] CNR, Canadian Neutron Beam Ctr, Chalk River Labs, Chalk River, ON K0J 1P0, Canada.
[Freelon, B.; Birgeneau, R. J.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RP Wilson, SD (reprint author), Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RI yamani, zahra/B-7892-2012;
OI Rotundu, Costel/0000-0002-1571-8352
FU Office of Science, Office of Basic Energy Sciences, U.S. Department of
Energy [DE-AC02-05CH11231, DE-AC03-76SF008]
FX We would like to thank A. Aharony and C. W. Garland for helpful
communications. This work was supported by the Director, Office of
Science, Office of Basic Energy Sciences, U.S. Department of Energy
under Contract No. DE-AC02-05CH11231 and Office of Basic Energy Sciences
U. S. DOE under Contract No. DE-AC03-76SF008.
NR 48
TC 84
Z9 85
U1 1
U2 20
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 18
AR 184519
DI 10.1103/PhysRevB.79.184519
PG 10
WC Physics, Condensed Matter
SC Physics
GA 451WI
UT WOS:000266501200104
ER
PT J
AU Xue, Y
Zhang, Y
Zhang, PH
AF Xue, Yu
Zhang, Yong
Zhang, Peihong
TI Theory of the color change of NaxWO3 as a function of Na-charge doping
SO PHYSICAL REVIEW B
LA English
DT Article
DE colour; doping profiles; sodium compounds
ID SODIUM-TUNGSTEN BRONZES; OPTICAL-PROPERTIES; THIN-FILMS; WO3; ENERGY;
ELECTROCHROMISM; PSEUDOPOTENTIALS; SPECTROSCOPY; MECHANISM; TRIOXIDE
AB We report theoretical investigations of the coloration of WO3 upon charge insertion using sodium tungsten bronze (NaxWO3) as a model system. Our results explain well the systematic color change of NaxWO3 from dark blue to violet, red-orange, and finally to golden yellow as sodium concentration x increases from 0.3 to unity. Proper accounts for both the interband and the intraband contributions to the optical response are found to be very important for a detailed understanding of the coloration mechanism in this system.
C1 [Xue, Yu; Zhang, Peihong] SUNY Buffalo, Dept Phys, Buffalo, NY 14260 USA.
[Zhang, Yong] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Xue, Y (reprint author), SUNY Buffalo, Dept Phys, Buffalo, NY 14260 USA.
RI Zhang, Peihong/D-2787-2012
FU National Science Foundation [CBET-0844720]; UB 2020 Interdisciplinary
Research Development Fund (IRDF); Center for Computational Research at
the University at Buffalo, SUNY
FX We thank M. D. Jones for his assistance in coding. This work was
supported in part by the National Science Foundation under Grant No.
CBET-0844720, and by the UB 2020 Interdisciplinary Research Development
Fund (IRDF). We acknowledge the computational support provided by the
Center for Computational Research at the University at Buffalo, SUNY.
NR 35
TC 10
Z9 10
U1 4
U2 31
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 20
AR 205113
DI 10.1103/PhysRevB.79.205113
PG 4
WC Physics, Condensed Matter
SC Physics
GA 451WL
UT WOS:000266501500040
ER
PT J
AU Zeng, ZH
Da Silva, JLF
Deng, HQ
Li, WX
AF Zeng, Zhen-Hua
Da Silva, Juarez L. F.
Deng, Hui-Qiu
Li, Wei-Xue
TI Density functional theory study of the energetics, electronic structure,
and core-level shifts of NO adsorption on the Pt(111) surface
SO PHYSICAL REVIEW B
LA English
DT Article
DE adsorption; charge exchange; core levels; density functional theory;
nitrogen compounds; platinum; pseudopotential methods; vibrational
modes; work function
ID GENERALIZED-GRADIENT-APPROXIMATION; AUGMENTED-WAVE METHOD; MINIMUM
ENERGY PATHS; ELASTIC BAND METHOD; MOLECULAR ADSORPTION; ORDERED
STRUCTURES; SITE PREFERENCE; METAL-SURFACES; SADDLE-POINTS; SPIN-DENSITY
AB In this work, we report a first-principles investigation of the energetics, structures, electronic properties, and core-level shifts of NO adsorption on the Pt(111) surface. Our calculations are based on density functional theory within the framework of the ultrasoft pseudopotential plane-wave and the all-electron projected augmented-wave methods. We found that at 0.25, 0.50, and 0.75 monolayer, NO adsorbs preferentially in the fcc, fcc+top, and fcc+top+hcp sites, respectively. The geometric parameters, adsorption energies, vibrational frequencies, and work-function changes are in good agreement with the experimental data. The interaction between NO and Pt(111) was found to follow a donation-back-donation process, in which the NO sigma states donate electrons to the substrate Pt d states, while the substrate Pt d states back donate to the NO pi states. Though there is an overall net charge transfer from the substrate to the NO adsorbate regardless of the adsorption sites and coverages, the spatial redistribution of the transferred electron is site dependent. The charge accumulation for NO in the top sites occurs closer to the surface than NO in the hollow sites, which results in the reduction of the Pt(111) surface work function for the top NO but an increase for the hollow NO. The core-level shifts of the topmost surface Pt atoms coordinated with top and hollow NO molecules at different coverages are in excellent agreement with experiments. In contrast, the N 1s core-level shifts between top and hollow NO (similar to 0.7 eV) deviated significantly from the zero shift found in experiments. Our analysis indicates that the difference may come from the thermal vibration and rotation of adsorbed NO on the Pt(111) surface.
C1 [Da Silva, Juarez L. F.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Zeng, Zhen-Hua; Li, Wei-Xue] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China.
[Zeng, Zhen-Hua; Li, Wei-Xue] Chinese Acad Sci, Dalian Inst Chem Phys, Ctr Theoret & Computat Chem, Dalian 116023, Peoples R China.
[Zeng, Zhen-Hua] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China.
[Deng, Hui-Qiu] Hunan Univ, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China.
RP Da Silva, JLF (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
RI Li, Wei-Xue/A-1414-2011; Deng, Huiqiu/A-9530-2009; Da Silva, Juarez L.
F./D-1779-2011; Zeng, Zhenhua/E-1795-2012
OI Deng, Huiqiu/0000-0001-8986-104X; Da Silva, Juarez L.
F./0000-0003-0645-8760; Zeng, Zhenhua/0000-0002-3087-8581
NR 79
TC 30
Z9 30
U1 4
U2 32
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 20
AR 205413
DI 10.1103/PhysRevB.79.205413
PG 13
WC Physics, Condensed Matter
SC Physics
GA 451WL
UT WOS:000266501500094
ER
PT J
AU Zhang, LJ
Singh, DJ
AF Zhang, Lijun
Singh, D. J.
TI Electronic structure of Ba(Fe,Ru)(2)As-2 and Sr(Fe,Ir)(2)As-2 alloys
SO PHYSICAL REVIEW B
LA English
DT Article
DE arsenic alloys; band structure; barium alloys; density functional
theory; Fermi level; iridium alloys; iron alloys; ruthenium alloys;
strontium alloys; superconducting materials
ID SUPERCONDUCTIVITY
AB The electronic structures of Ba(Fe,Ru)(2)As-2 and Sr(Fe,Ir)(2)As-2 are investigated using density functional calculations. We find that these systems behave as coherent alloys from the electronic structure point of view. In particular, the isoelectronic substitution of Fe by Ru does not provide doping but rather suppresses the spin-density wave characteristic of the pure Fe compound by a reduction in the Stoner enhancement and an increase in the bandwidth due to hybridization involving Ru. The electronic structure near the Fermi level otherwise remains quite similar to that of BaFe2As2. The behavior of the Ir alloy is similar except that in this case there is additional electron doping.
C1 [Zhang, Lijun; Singh, D. J.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Zhang, LJ (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RI Zhang, Lijun/F-7710-2011; Singh, David/I-2416-2012
FU Department of Energy, Division of Materials Sciences and Engineering
FX We are grateful for helpful discussions and assistance from A. Subedi.
This work was supported by the Department of Energy, Division of
Materials Sciences and Engineering.
NR 31
TC 33
Z9 33
U1 1
U2 16
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAY
PY 2009
VL 79
IS 17
AR 174530
DI 10.1103/PhysRevB.79.174530
PG 5
WC Physics, Condensed Matter
SC Physics
GA 451WH
UT WOS:000266501100120
ER
PT J
AU Allmond, JM
Bernstein, LA
Beausang, CW
Phair, L
Bleuel, DL
Burke, JT
Escher, JE
Evans, KE
Goldblum, BL
Hatarik, R
Jeppesen, HB
Lesher, SR
McMahan, MA
Rasmussen, JO
Scielzo, ND
Wiedeking, M
AF Allmond, J. M.
Bernstein, L. A.
Beausang, C. W.
Phair, L.
Bleuel, D. L.
Burke, J. T.
Escher, J. E.
Evans, K. E.
Goldblum, B. L.
Hatarik, R.
Jeppesen, H. B.
Lesher, S. R.
McMahan, M. A.
Rasmussen, J. O.
Scielzo, N. D.
Wiedeking, M.
TI Relative U-235(n,gamma) and (n,f) cross sections from U-235(d,p gamma)
and (d,pf)
SO PHYSICAL REVIEW C
LA English
DT Article
ID TRANSFER-REACTION TH-232(HE-3; GENERATION; SURROGATE; PA-233(N;
P)PA-234; CAPTURE; CLOVER
AB The internal surrogate ratio method allows for the determination of an unknown cross section, such as (n,gamma), relative to a better-known cross section, such as (n,f), by measuring the relative exit-channel probabilities of a surrogate reaction that proceeds through the same compound nucleus. The validity of the internal surrogate ratio method is tested by comparing the relative gamma and fission exit-channel probabilities of a U-236(*) compound nucleus, formed in the U-235(d,p) reaction, to the known U-235(n,gamma) and (n,f) cross sections. A model-independent method for measuring the gamma-channel yield is presented and used.
C1 [Allmond, J. M.; Beausang, C. W.] Univ Richmond, Dept Phys, Richmond, VA 23173 USA.
[Bernstein, L. A.; Bleuel, D. L.; Burke, J. T.; Escher, J. E.; Lesher, S. R.; Scielzo, N. D.; Wiedeking, M.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Phair, L.; Hatarik, R.; Jeppesen, H. B.; McMahan, M. A.; Rasmussen, J. O.; Wiedeking, M.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
[Evans, K. E.; Goldblum, B. L.] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA.
[Hatarik, R.] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
RP Allmond, JM (reprint author), Univ Richmond, Dept Phys, Richmond, VA 23173 USA.
RI Escher, Jutta/E-1965-2013; Burke, Jason/I-4580-2012;
OI Allmond, James Mitchell/0000-0001-6533-8721
FU National Science Foundation; US Department of Energy [DE-FG52-06NA26206,
DE-FG02-05ER41379]; Lawrence Livermore National Laboratory
[W-7405-Eng-48, DE-AC52-07NA27344]; Lawrence Berkeley National
Laboratory [DE-AC02-05CH11231]; Rutgers University [DE-FG52-03NA00143]
FX The authors thank the 88-Inch Cyclotron operations and facilities staff
for their help in performing this experiment and I. Y. Lee for useful
discussions concerning the data analysis. This work was performed under
the auspices of the National Science Foundation and the US Department of
Energy by the University of Richmond under Grants DE-FG52-06NA26206 and
DE-FG02-05ER41379, Lawrence Livermore National Laboratory under
Contracts W-7405-Eng-48 and DE-AC52-07NA27344, Lawrence Berkeley
National Laboratory under Contract DE-AC02-05CH11231, and Rutgers
University under Contract DE-FG52-03NA00143.
NR 30
TC 28
Z9 29
U1 0
U2 7
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2009
VL 79
IS 5
AR 054610
DI 10.1103/PhysRevC.79.054610
PG 9
WC Physics, Nuclear
SC Physics
GA 451WN
UT WOS:000266501700059
ER
PT J
AU Chae, KY
Bardayan, DW
Blackmon, JC
Chipps, KA
Hatarik, R
Jones, KL
Kozub, RL
Liang, JF
Matei, C
Moazen, BH
Nesaraja, CD
O'Malley, PD
Pain, SD
Pittman, ST
Smith, MS
AF Chae, K. Y.
Bardayan, D. W.
Blackmon, J. C.
Chipps, K. A.
Hatarik, R.
Jones, K. L.
Kozub, R. L.
Liang, J. F.
Matei, C.
Moazen, B. H.
Nesaraja, C. D.
O'Malley, P. D.
Pain, S. D.
Pittman, S. T.
Smith, M. S.
TI Constraint on the astrophysical Ne-18(alpha,p)Na-21 reaction rate
through a Mg-24(p,t)Mg-22 measurement
SO PHYSICAL REVIEW C
LA English
DT Article
ID X-RAY-BURSTS; MG-22
AB The Ne-18(alpha,p)Na-21 reaction plays a crucial role in the (alpha,p) process, which leads to the rapid proton capture process in x-ray bursts. The reaction rate depends upon properties of Mg-22 levels above the alpha threshold at 8.14 MeV. Despite recent studies of these levels, only the excitation energies are known for most with no constraints on the spins. We have studied the Mg-24(p,t)Mg-22 reaction at the Oak Ridge National Laboratory (ORNL) Holifield Radioactive Ion Beam Facility (HRIBF), and by measuring the angular distributions of outgoing tritons, we provide some of the first experimental constraints on the spins of astrophysically important Ne-18(alpha,p)Na-21 resonances.
C1 [Chae, K. Y.; Jones, K. L.; Moazen, B. H.; Nesaraja, C. D.; Pittman, S. T.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Bardayan, D. W.; Blackmon, J. C.; Liang, J. F.; Nesaraja, C. D.; Smith, M. S.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
[Chipps, K. A.] Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA.
[Hatarik, R.; O'Malley, P. D.; Pain, S. D.] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
[Kozub, R. L.] Tennessee Technol Univ, Dept Phys, Cookeville, TN 38505 USA.
[Matei, C.] Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA.
RP Chae, KY (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RI Jones, Katherine/B-8487-2011; Pain, Steven/E-1188-2011; Matei,
Catalin/B-2586-2008
OI Jones, Katherine/0000-0001-7335-1379; Pain, Steven/0000-0003-3081-688X;
Matei, Catalin/0000-0002-2254-3853
FU National Science Foundation [PHY-00-98800]; US Department of Energy
[DE-FG02-96ER40983]; University of Tennessee [DE-AC05-00OR22725]
FX The authors thank B. Oginni and S. M. Grimes for help with running the
Hauser- Feshbach code. This work was supported in part by the National
Science Foundation under Contract NSF-PHY-00-98800; the US Department of
Energy under Contract DE-FG02-96ER40983 with University of Tennessee and
Contract DE-AC05-00OR22725 with ORNL.
NR 20
TC 16
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U1 0
U2 3
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2009
VL 79
IS 5
AR 055804
DI 10.1103/PhysRevC.79.055804
PG 5
WC Physics, Nuclear
SC Physics
GA 451WN
UT WOS:000266501700092
ER
PT J
AU Close, FE
Melnitchouk, W
AF Close, F. E.
Melnitchouk, W.
TI Duality in semi-inclusive pion electroproduction
SO PHYSICAL REVIEW C
LA English
DT Article
ID QUARK-HADRON DUALITY; CONSTITUENT QUARKS; FORM-FACTORS; MODEL;
SCATTERING; BARYONS; PROTON
AB We explore quark-hadron duality in semi-inclusive pion electroproduction on proton and neutron targets. Using the spin-flavor symmetric quark model, we compute ratios of pi(+) and pi(-) cross sections for both unpolarized and polarized scattering and discuss realizations of duality in several symmetry-breaking scenarios. The model calculations allow one to understand some of the key features of recent data on semi-inclusive pion production at low energies.
C1 [Close, F. E.] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3NP, England.
[Melnitchouk, W.] Jefferson Lab, Newport News, VA 23606 USA.
RP Close, FE (reprint author), Univ Oxford, Rudolf Peierls Ctr Theoret Phys, 1 Keble Rd, Oxford OX1 3NP, England.
NR 30
TC 8
Z9 8
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2009
VL 79
IS 5
AR 055202
DI 10.1103/PhysRevC.79.055202
PG 9
WC Physics, Nuclear
SC Physics
GA 451WN
UT WOS:000266501700080
ER
PT J
AU Crawford, HL
Mantica, PF
Berryman, JS
Broda, R
Fornal, B
Hoffman, CR
Hoteling, N
Janssens, RVF
Lenzi, SM
Pereira, J
Stoker, JB
Tabor, SL
Walters, WB
Wang, X
Zhu, S
AF Crawford, H. L.
Mantica, P. F.
Berryman, J. S.
Broda, R.
Fornal, B.
Hoffman, C. R.
Hoteling, N.
Janssens, R. V. F.
Lenzi, S. M.
Pereira, J.
Stoker, J. B.
Tabor, S. L.
Walters, W. B.
Wang, X.
Zhu, S.
TI Low-energy structure of Mn-61 populated following beta decay of Cr-61
SO PHYSICAL REVIEW C
LA English
DT Article
ID NEUTRON-RICH ISOTOPES; SHAPE TRANSITION; NUCLEI; DEFORMATION; ZIRCONIUM;
GERMANIUM; REGION; BEAMS; IRON; MASS
AB beta decay of the Cr-61(37) ground state has been studied. A new half-life of 233 +/- 11 ms has been deduced, and seven delayed gamma rays have been assigned to the daughter Mn-61(36). The low-energy level structure of Mn-61(36) is similar to that of the less neutron-rich Mn-57,Mn-59 nuclei. The odd-A(25)Mn isotopes follow the systematic trend in the yrast states of the even-even, Z+1 Fe-26 isotopes, and not that of the Z-1 Cr-24 isotopes, where a possible onset of collectivity has been suggested to occur already at N=36.
C1 [Crawford, H. L.; Mantica, P. F.; Berryman, J. S.; Stoker, J. B.] Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA.
[Crawford, H. L.; Mantica, P. F.; Berryman, J. S.; Pereira, J.; Stoker, J. B.] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA.
[Broda, R.; Fornal, B.] Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland.
[Hoffman, C. R.; Tabor, S. L.] Florida State Univ, Dept Phys & Astron, Tallahassee, FL 32306 USA.
[Hoteling, N.; Janssens, R. V. F.; Wang, X.; Zhu, S.] Argonne Natl Lab, Div Phys, Argonne, IL 60429 USA.
[Hoteling, N.; Walters, W. B.] Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA.
[Lenzi, S. M.] Univ Padua, Dept Phys, I-35131 Padua, Italy.
[Lenzi, S. M.] Natl Inst Nucl Phys, Padova Sect, I-35131 Padua, Italy.
[Pereira, J.] Michigan State Univ, Joint Inst Nucl Astrophys, E Lansing, MI 48824 USA.
[Wang, X.] Univ Notre Dame, Dept Phys, South Bend, IN 46556 USA.
RP Crawford, HL (reprint author), Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA.
RI Crawford, Heather/E-2208-2011; Lenzi, Silvia/I-6750-2012
FU National Science Foundation [PHY-06-06007]; US Department of Energy;
Office of Nuclear Physics [DE-AC02-06CH11357, DE-FG02-94ER40834]; Polish
Academy of Sciences [1PO3B 059 29]; Natural Science and Engineering
Research Council (NSERC) of Canada
FX The authors thank the NSCL operations staff for providing the primary
and secondary beams for this experiment and the NSCL. group for
assistance in setting up the Ge detectors from SeGA. This work was
supported in part by the National Science Foundation, Grant
PHY-06-06007; the US Department of Energy, Office of Nuclear Physics,
under Contracts DE-AC02-06CH11357 and DE-FG02-94ER40834; and the Polish
Academy of Sciences, Grant 1PO3B 059 29. H. L. C. acknowledges support
from the Natural Science and Engineering Research Council (NSERC) of
Canada.
NR 41
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U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2009
VL 79
IS 5
AR 054320
DI 10.1103/PhysRevC.79.054320
PG 7
WC Physics, Nuclear
SC Physics
GA 451WN
UT WOS:000266501700037
ER
PT J
AU El-Bennich, B
Lacombe, M
Loiseau, B
Wycech, S
AF El-Bennich, B.
Lacombe, M.
Loiseau, B.
Wycech, S.
TI Paris NN potential constrained by recent antiprotonic-atom data and np
total cross sections
SO PHYSICAL REVIEW C
LA English
DT Article
ID NUCLEON INTERACTION; LEVEL SHIFTS; LOW-ENERGY; SCATTERING; PROTONIUM;
HYDROGEN
AB We report on an updated Paris NN optical potential. The long- and intermediate-range real parts are obtained by G-parity transformation of the Paris NN potential based on a theoretical dispersion-relation treatment of the correlated and uncorrelated two-pion exchange. The short-range imaginary potential parametrization results from the calculation of the NN annihilation box diagram into two mesons with a nucleon-antinucleon intermediate state in the crossed channel. The parametrized real and imaginary short range parts are determined by fitting not only the existing experimental data included in the 1999 version of the Paris NN potential, but also the recent antiprotonic-hydrogen data and np total cross sections. The description of these new observables is improved. Only this readjusted potential generates an isospin zero (1)S(0), 52 MeV broad quasibound state at 4.8 MeV below the threshold. Recent BES data on J/psi decays could support the existence of such a state.
C1 [El-Bennich, B.; Lacombe, M.; Loiseau, B.] Univ Paris 06, CNRS, Theory Grp, Lab Phys Nucl & Hautes Energies,IN2P3, F-75252 Paris, France.
[El-Bennich, B.; Lacombe, M.; Loiseau, B.] Univ Paris Diderot, CNRS, Theory Grp, Lab Phys Nucl & Hautes Energies,IN2P3, F-75252 Paris, France.
[El-Bennich, B.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
[Wycech, S.] Soltan Inst Nucl Studies, PL-00681 Warsaw, Poland.
RP El-Bennich, B (reprint author), Univ Paris 06, CNRS, Theory Grp, Lab Phys Nucl & Hautes Energies,IN2P3, 4 Pl Jussieu, F-75252 Paris, France.
FU Department of Energy; Office of Nuclear Physics [DEAC02- 06CH11357];
IN2P3-Polish Laboratory Convention [05-115]
FX We acknowledge useful discussions on quasibound states and resonances
with B. Moussallam. We also thank J.-P. Dedonder and O. Leitner for
helpful comments. M. L. and B. L. are grateful for valuable exchanges
with Yupeng Yan. This work was supported in part by the Department of
Energy, Office of Nuclear Physics, Contract No. DEAC02- 06CH11357. This
research was also performed in the framework of the IN2P3-Polish
Laboratory Convention (Collaboration No. 05-115).
NR 24
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U1 1
U2 3
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2009
VL 79
IS 5
AR 054001
DI 10.1103/PhysRevC.79.054001
PG 9
WC Physics, Nuclear
SC Physics
GA 451WN
UT WOS:000266501700009
ER
PT J
AU Gavin, S
McLerran, L
Moschelli, G
AF Gavin, Sean
McLerran, Larry
Moschelli, George
TI Long range correlations and the soft ridge in relativistic nuclear
collisions
SO PHYSICAL REVIEW C
LA English
DT Article
ID TRANSVERSE-MOMENTUM; ANGULAR-CORRELATIONS; AU COLLISIONS; MODEL;
DEPENDENCE; 2-PARTICLE; RHIC/LHC; HADRONS
AB Relativistic Heavy Ion Collider experiments exhibit correlations peaked in relative azimuthal angle and extended in rapidity. Called the ridge, this peak occurs both with and without a jet trigger. We argue that the untriggered ridge arises when particles formed by flux tubes in an early Glasma stage later manifest transverse flow. Combining a blast wave model of flow fixed by single-particle spectra with a simple description of the Glasma, we find excellent agreement with current data.
C1 [Gavin, Sean; Moschelli, George] Wayne State Univ, Dept Phys & Astron, Detroit, MI 48202 USA.
[McLerran, Larry] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
[McLerran, Larry] Brookhaven Natl Lab, Brookhaven Res Ctr, RIKEN, Upton, NY 11973 USA.
RP Gavin, S (reprint author), Wayne State Univ, Dept Phys & Astron, 666 W Hancock, Detroit, MI 48202 USA.
FU US NSF PECASE/CAREER [PHY-0348559]; US DOE [DE-AC0298CH10886]
FX S. G. thanks the nuclear theory groups at Brookhaven and University of
Minnesota for their hospitality. We thank M. Baker, R. Bellwied, C. De
Silva, A. Dumitru, F. Gelis, J. Kapusta, L. Ray, T. Springer, P.
Sorenson, P. Steinberg, R. Venugopalan, and S. Voloshin. This work was
supported in part by US NSF PECASE/CAREER Grant PHY-0348559 (S. G. and
G. M.) and US DOE Contract No. DE-AC0298CH10886 (L. M.).
NR 37
TC 107
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U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9985
EI 2469-9993
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2009
VL 79
IS 5
AR 051902
DI 10.1103/PhysRevC.79.051902
PG 4
WC Physics, Nuclear
SC Physics
GA 451WN
UT WOS:000266501700008
ER
PT J
AU Gu, L
Zhu, SJ
Hamilton, JH
Ramayya, AV
Hwang, JK
Liu, SH
Wang, JG
Luo, YX
Rasmussen, JO
Lee, IY
Che, XL
Ding, HB
Li, K
Xu, Q
Yang, YY
Ma, WC
AF Gu, L.
Zhu, S. J.
Hamilton, J. H.
Ramayya, A. V.
Hwang, J. K.
Liu, S. H.
Wang, J. G.
Luo, Y. X.
Rasmussen, J. O.
Lee, I. Y.
Che, X. L.
Ding, H. B.
Li, K.
Xu, Q.
Yang, Y. Y.
Ma, W. C.
TI Collective band structures in neutron-rich Tc-106,Tc-107
SO PHYSICAL REVIEW C
LA English
DT Article
ID ROTATIONAL BANDS; DEFORMATION; FISSION; NUCLEI; IDENTIFICATION;
EVOLUTION; ISOTOPES; REGION; MO-106; STATES
AB The high spin states of neutron-rich Tc-106,Tc-107 nuclei have been reinvestigated by observing prompt gamma rays from the spontaneous fission of Cf-252. In Tc-106, a previously known collective band is expanded, and a new collective band is identified. In Tc-107, a collective band based on the pi 5/2(-)[303] orbital is confirmed and extended. Inconsistencies in the configuration assignments for positive parity bands in Tc-105,Tc-107 in the previous reports are clarified. The spins and parities as well as the configurations for the two bands in Tc-106 are assigned according to the angular momentum alignments and g-factor calculations. Other characteristics for the observed bands are discussed.
C1 [Gu, L.; Zhu, S. J.; Wang, J. G.; Che, X. L.; Ding, H. B.; Xu, Q.; Yang, Y. Y.] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China.
[Zhu, S. J.; Hamilton, J. H.; Ramayya, A. V.; Hwang, J. K.; Liu, S. H.; Luo, Y. X.; Li, K.] Vanderbilt Univ, Dept Phys, Nashville, TN 37235 USA.
[Luo, Y. X.; Rasmussen, J. O.; Lee, I. Y.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Ma, W. C.] Mississippi State Univ, Dept Phys, Mississippi State, MS 39762 USA.
RP Gu, L (reprint author), Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China.
EM zhushj@mail.tsinghua.edu.cn
RI Gu, Lin/F-3980-2010
FU National Natural Science Foundation of China [10775078, 10575057]; Major
State Basic Research Development Program [2007CB815005]; Special Program
of Higher Education Science Foundation [20070003149]; Vanderbilt
University, Mississippi State University; Lawrence Berkeley National
Laboratory; US Department of Energy [DE-FG05-88ER40407, FG02-95ER40939,
DE-AC03-76SF00098]
FX The work at Tsinghua University was supported by the National Natural
Science Foundation of China under Grant Nos. 10775078 and 10575057, the
Major State Basic Research Development Program under Grand No.
2007CB815005, and the Special Program of Higher Education Science
Foundation under Grant No. 20070003149. The work at Vanderbilt
University, Mississippi State University, and Lawrence Berkeley National
Laboratory was supported by the US Department of Energy under Grant and
Contract Nos. DE-FG05-88ER40407, FG02-95ER40939,and DE-AC03-76SF00098,
respectively.
NR 29
TC 5
Z9 5
U1 0
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2009
VL 79
IS 5
AR 054317
DI 10.1103/PhysRevC.79.054317
PG 8
WC Physics, Nuclear
SC Physics
GA 451WN
UT WOS:000266501700034
ER
PT J
AU Guiseppe, VE
Devlin, M
Elliott, SR
Fotiades, N
Hime, A
Mei, DM
Nelson, RO
Perepelitsa, DV
AF Guiseppe, V. E.
Devlin, M.
Elliott, S. R.
Fotiades, N.
Hime, A.
Mei, D. -M.
Nelson, R. O.
Perepelitsa, D. V.
TI Neutron inelastic scattering and reactions in natural Pb as a background
in neutrinoless double-beta-decay experiments
SO PHYSICAL REVIEW C
LA English
DT Article
ID CROSS-SECTIONS; MASS; GERMANIUM; ENERGIES; GE-76
AB Inelastic neutron scattering and reactions on Pb isotopes can result in gamma rays near the signature end-point energy in a number of beta beta isotopes. In particular, there are gamma-ray transitions in (206,207,208)Pb that might produce energy deposits at the (76)GeQ(beta beta) in Ge detectors used for 0 nu beta beta searches. The levels that produce these gamma rays can be excited by (n,n(')gamma) or (n,xn gamma) reactions, but the cross sections are small and previously unmeasured. This work uses the pulsed neutron beam at the Los Alamos Neutron Science Center to directly measure reactions of interest to beta beta-decay experiments. The cross section on (nat)Pb to produce the 2041-keV gamma ray from (206)Pb is measured to be 3.6 +/- 0.7 (stat.) +/- 0.3 (syst.) mb at approximate to 9.6 MeV. The cross section on (nat)Pb to produce the 3061,3062-keV gamma rays from (207)Pb and (208)Pb is measured to be 3.9 +/- 0.8 (stat.) +/- 0.4 (syst.) mb at the same energy. We report cross sections or place upper limits on the cross sections for exciting some other levels in Pb that have transition energies corresponding to Q(beta beta) in other beta beta isotopes.
C1 [Guiseppe, V. E.; Devlin, M.; Elliott, S. R.; Fotiades, N.; Hime, A.; Nelson, R. O.; Perepelitsa, D. V.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Mei, D. -M.] Univ S Dakota, Dept Earth Sci & Phys, Vermillion, SD 57069 USA.
RP Guiseppe, VE (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM guiseppe@lanl.gov
RI Devlin, Matthew/B-5089-2013
OI Devlin, Matthew/0000-0002-6948-2154
FU Laboratory Directed Research and Development; National Science
Foundation [0758120]; US Department of Energy [DE-AC52-06NA25396]
FX This work was supported in part by Laboratory Directed Research and
Development at Los Alamos National Laboratory and National Science
Foundation Grant 0758120. This work benefited from the use of the Los
Alamos Neutron Science Center, funded by the US Department of Energy
under Contract DE-AC52-06NA25396. We thank Toshihiko Kawano for
discussions related to the use of TALYS.
NR 31
TC 15
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U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2009
VL 79
IS 5
AR 054604
DI 10.1103/PhysRevC.79.054604
PG 7
WC Physics, Nuclear
SC Physics
GA 451WN
UT WOS:000266501700053
ER
PT J
AU Guzey, V
Thomas, AW
Tsushima, K
AF Guzey, V.
Thomas, A. W.
Tsushima, K.
TI Medium modifications of the bound nucleon generalized parton
distributions and the quark contribution to the spin sum rule
SO PHYSICAL REVIEW C
LA English
DT Article
ID BETA-DECAY; EMC
AB We estimate the nuclear medium modifications of the quark contribution to the bound nucleon spin sum rule, J(q*), as well the separate helicity, Delta Sigma(*), and the angular momentum, L(q*), contributions to J(q*). For the calculation of the bound nucleon generalized parton distributions (GPDs), we use as input the bound nucleon elastic form factors predicted in the quark-meson coupling model. Our model for the bound nucleon GPDs is relevant for incoherent deeply virtual Compton scattering (DVCS) with nuclear targets. We find that the medium modifications increase J(q*) and L(q*) and decrease Delta Sigma(*) compared to the free nucleon case. The effect is large and increases with increasing nuclear density rho. For instance, at rho=rho(0)=0.15 fm(-3),J(q*) increases by 7%, L(q*) increases by 20%, and Delta Sigma(*) decreases by 17%. These in-medium modifications of the bound nucleon spin properties are a general feature of relativistic mean-field quark models and may be understood qualitatively in terms of the enhancement of the lower component of the quark Dirac spinor in the nuclear medium.
C1 [Guzey, V.; Thomas, A. W.; Tsushima, K.] Thomas Jefferson Natl Accelerator Facil, Ctr Theory, Newport News, VA 23606 USA.
[Thomas, A. W.] Coll William & Mary, Williamsburg, VA 23178 USA.
[Tsushima, K.] Thomas Jefferson Natl Accelerator Facil, EBAC, Newport News, VA 23606 USA.
RP Guzey, V (reprint author), Thomas Jefferson Natl Accelerator Facil, Ctr Theory, Newport News, VA 23606 USA.
EM vguzey@jlab.org; awthomas@jlab.org; tsushima@jlab.org
RI Thomas, Anthony/G-4194-2012;
OI Thomas, Anthony/0000-0003-0026-499X; Guzey, Vadim/0000-0002-2393-8507
FU Jefferson Science Associates, LLC [DE-AC05-06OR23177]
FX This work was authored by Jefferson Science Associates, LLC, under US
DOE Contract DE-AC05-06OR23177.
NR 39
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U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2009
VL 79
IS 5
AR 055205
DI 10.1103/PhysRevC.79.055205
PG 6
WC Physics, Nuclear
SC Physics
GA 451WN
UT WOS:000266501700083
ER
PT J
AU Randrup, J
AF Randrup, Jorgen
TI Phase transition dynamics for baryon-dense matter
SO PHYSICAL REVIEW C
LA English
DT Article
ID ENERGY; DECOMPOSITION; LATTICE; QCD
AB We construct a simple two-phase equation of state intended to resemble that of compressed baryon-rich matter and then introduce a gradient term in the compressional energy density to take account of finite-range effects in nonuniform configurations. With this model we study the interface between the two coexisting phases and obtain estimates for the associated interface tension. Subsequently, we incorporate the finite-range equation of state into ideal or viscous fluid dynamics and derive the collective dispersion relation for the mechanically unstable modes of bulk matter in the spinodal region of the thermodynamic phase diagram. Combining these results with time scales extracted from existing dynamical transport simulations, we discuss the prospects for spinodal phase separation to occur in nuclear collisions. We argue that these can be optimized by a careful tuning of the collision energy to maximize the time spent by the bulk of the system inside the mechanically unstable spinodal region of the phase diagram. Our specific numerical estimates suggest cautious optimism that this phenomenon may in fact occur, though a full dynamical simulation is needed for a detailed assessment.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
RP Randrup, J (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
NR 23
TC 56
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U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9985
EI 2469-9993
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2009
VL 79
IS 5
AR 054911
DI 10.1103/PhysRevC.79.054911
PG 13
WC Physics, Nuclear
SC Physics
GA 451WN
UT WOS:000266501700075
ER
PT J
AU Tang, ZB
Xu, YC
Ruan, LJ
van Buren, G
Wang, FQ
Xu, ZB
AF Tang, Zebo
Xu, Yichun
Ruan, Lijuan
van Buren, Gene
Wang, Fuqiang
Xu, Zhangbu
TI Spectra and radial flow in relativistic heavy ion collisions with
Tsallis statistics in a blast-wave description
SO PHYSICAL REVIEW C
LA English
DT Article
ID QUARK-GLUON PLASMA; TRANSVERSE-MOMENTUM; NUCLEAR COLLISIONS; AU+AU
COLLISIONS; D+AU COLLISIONS; COLLABORATION; DISTRIBUTIONS; FLUCTUATIONS;
MATTER; P+P
AB We have implemented the Tsallis statistics in a Blast-Wave model (TBW) and applied it to midrapidity transverse-momentum spectra of identified particles measured at BNL Relativistic Heavy Ion Collider (RHIC). This new TBW function fits the RHIC data very well for p(T)< 3 GeV/c. We observed that the collective flow velocity starts from zero in p+p and peripheral Au+Au collisions and grows to 0.470 +/- 0.009c in central Au+Au collisions. The resulting (q-1) parameter, which characterizes the degree of nonequilibrium in a system, indicates an evolution from a highly nonequilibrated system in p+p collisions toward an almost thermalized system in central Au+Au collisions. The temperature and collective velocity are well described by a quadratic dependence on (q-1). Two sets of parameters in our TBW are required to describe the meson and baryon groups separately in p+p collisions while one set appears to fit all spectra in central Au+Au collisions.
C1 [Tang, Zebo; Xu, Yichun] Univ Sci & Technol China, Hefei 230026, Peoples R China.
[Ruan, Lijuan; van Buren, Gene; Xu, Zhangbu] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Wang, Fuqiang] Purdue Univ, W Lafayette, IN 47907 USA.
RP Tang, ZB (reprint author), Univ Sci & Technol China, Hefei 230026, Peoples R China.
EM xzb@bnl.gov
RI Tang, Zebo/A-9939-2014
OI Tang, Zebo/0000-0002-4247-0081
FU US DOEOffice of Science [DE-FG02-88ER40412, DE-AC02-98CH10886]; National
Natural Science Foundation of China [10610286, 10610285, 10475071,
10575101, 10805046]; Knowledge Innovation Project; Chinese Academy of
Sciences [KJCX2-YW-A14]
FX The authors thank Drs. Aihong Tang, Bedanga Mohanty, James Dunlop, Paul
Sorensen, Hank Crawford, and Mike Lisa for valuable discussions. We
thank the STAR Collaboration and the RCF at BNL for their support. This
work was supported in part by the Offices of NP and HEP within the US
DOEOffice of Science under Contracts DE-FG02-88ER40412 and
DE-AC02-98CH10886. Authors Yichun Xu and Zebo Tang are supported in part
by the National Natural Science Foundation of China under Grants
10610286 (10610285), 10475071, 10575101, and 10805046 and the Knowledge
Innovation Project of the Chinese Academy of Sciences under Grant
KJCX2-YW-A14. Lijuan Ruan is supported in part by the Battelle Memorial
Institute and Stony Brook University. Zhangbu Xu is supported in part by
the PECASE Grant.
NR 50
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U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2009
VL 79
IS 5
AR 051901
DI 10.1103/PhysRevC.79.051901
PG 5
WC Physics, Nuclear
SC Physics
GA 451WN
UT WOS:000266501700007
ER
PT J
AU Tjon, JA
Blunden, PG
Melnitchouk, W
AF Tjon, J. A.
Blunden, P. G.
Melnitchouk, W.
TI Detailed analysis of two-boson exchange in parity-violating e-p
scattering
SO PHYSICAL REVIEW C
LA English
DT Article
ID RADIATIVE-CORRECTIONS; NEUTRAL-CURRENT; FORM-FACTORS
AB We present a comprehensive study of two-boson exchange (TBE) corrections in parity-violating electron-proton elastic scattering. Within a hadronic framework, we compute contributions from box (and crossed box) diagrams in which the intermediate states are described by nucleons and Delta baryons. The Delta contribution is found to be much smaller than the nucleon one at backward angles (small epsilon), but becomes dominant in the forward scattering limit (epsilon -> 1), where the nucleon contribution vanishes. The dependence of the corrections on the input hadronic form factors is small for Q(2)less than or similar to 1 GeV2, but becomes significant at larger Q(2). We compute the nucleon and Delta TBE corrections relevant for recent and planned parity-violating experiments, with the total corrections ranging from -1% for forward angles to 1-2% at backward kinematics.
C1 [Tjon, J. A.] Univ Utrecht, Dept Phys, NL-3508 TC Utrecht, Netherlands.
[Blunden, P. G.] Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada.
[Melnitchouk, W.] Jefferson Lab, Newport News, VA 23606 USA.
RP Tjon, JA (reprint author), Univ Utrecht, Dept Phys, NL-3508 TC Utrecht, Netherlands.
FU DOE; [DE-AC05-06OR23177]
FX We are grateful to O. Lalakulich, V. Pascalutsa, and E. Paschos for
helpful discussions and communications. W.M. is supported by DOE
Contract DE-AC05-06OR23177, under which Jefferson Science Associates,
LLC, operates Jefferson Lab.
NR 42
TC 30
Z9 30
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
EI 1089-490X
J9 PHYS REV C
JI Phys. Rev. C
PD MAY
PY 2009
VL 79
IS 5
AR 055201
DI 10.1103/PhysRevC.79.055201
PG 12
WC Physics, Nuclear
SC Physics
GA 451WN
UT WOS:000266501700079
ER
PT J
AU Aaltonen, T
Adelman, J
Akimoto, T
Gonzalez, BA
Amerio, S
Amidei, D
Anastassov, A
Annovi, A
Antos, J
Apollinari, G
Apresyan, A
Arisawa, T
Artikov, A
Ashmanskas, W
Attal, A
Aurisano, A
Azfar, F
Badgett, W
Barbaro-Galtieri, A
Barnes, VE
Barnett, BA
Barria, P
Bartsch, V
Bauer, G
Beauchemin, PH
Bedeschi, F
Beecher, D
Behari, S
Bellettini, G
Bellinger, J
Benjamin, D
Beretvas, A
Beringer, J
Bhatti, A
Binkley, M
Bisello, D
Bizjak, I
Blair, RE
Blocker, C
Blumenfeld, B
Bocci, A
Bodek, A
Boisvert, V
Bolla, G
Bortoletto, D
Boudreau, J
Boveia, A
Brau, B
Bridgeman, A
Brigliadori, L
Bromberg, C
Brubaker, E
Budagov, J
Budd, HS
Budd, S
Burke, S
Burkett, K
Busetto, G
Bussey, P
Buzatu, A
Byrum, KL
Cabrera, S
Calancha, C
Campanelli, M
Campbell, M
Canelli, F
Canepa, A
Carls, B
Carlsmith, D
Carosi, R
Carrillo, S
Carron, S
Casal, B
Casarsa, M
Castro, A
Catastini, P
Cauz, D
Cavaliere, V
Cavalli-Sforza, M
Cerri, A
Cerrito, L
Chang, SH
Chen, YC
Chertok, M
Chiarelli, G
Chlachidze, G
Chlebana, F
Cho, K
Chokheli, D
Chou, JP
Choudalakis, G
Chuang, SH
Chung, K
Chung, WH
Chung, YS
Chwalek, T
Ciobanu, CI
Ciocci, MA
Clark, A
Clark, D
Compostella, G
Convery, ME
Conway, J
Cordelli, M
Cortiana, G
Cox, CA
Cox, DJ
Crescioli, F
Almenar, CC
Cuevas, J
Culbertson, R
Cully, JC
Dagenhart, D
Datta, M
Davies, T
de Barbaro, P
De Cecco, S
Deisher, A
De Lorenzo, G
Dell'Orso, M
Deluca, C
Demortier, L
Deng, J
Deninno, M
Derwent, PF
Di Canto, A
di Giovanni, GP
Dionisi, C
Di Ruzza, B
Dittmann, JR
D'Onofrio, M
Donati, S
Dong, P
Donini, J
Dorigo, T
Dube, S
Efron, J
Elagin, A
Erbacher, R
Errede, D
Errede, S
Eusebi, R
Fang, HC
Farrington, S
Fedorko, WT
Feild, RG
Feindt, M
Fernandez, JP
Ferrazza, C
Field, R
Flanagan, G
Forrest, R
Frank, MJ
Franklin, M
Freeman, JC
Furic, I
Gallinaro, M
Galyardt, J
Garberson, F
Garcia, JE
Garfinkel, AF
Garosi, P
Genser, K
Gerberich, H
Gerdes, D
Gessler, A
Giagu, S
Giakoumopoulou, V
Giannetti, P
Gibson, K
Gimmell, JL
Ginsburg, CM
Giokaris, N
Giordani, M
Giromini, P
Giunta, M
Giurgiu, G
Glagolev, V
Glenzinski, D
Gold, M
Goldschmidt, N
Golossanov, A
Gomez, G
Gomez-Ceballos, G
Goncharov, M
Gonzalez, O
Gorelov, I
Goshaw, AT
Goulianos, K
Gresele, A
Grinstein, S
Grosso-Pilcher, C
Group, RC
Grundler, U
da Costa, JG
Gunay-Unalan, Z
Haber, C
Hahn, K
Hahn, SR
Halkiadakis, E
Han, BY
Han, JY
Happacher, F
Hara, K
Hare, D
Hare, M
Harper, S
Harr, RF
Harris, RM
Hartz, M
Hatakeyama, K
Hays, C
Heck, M
Heijboer, A
Heinrich, J
Henderson, C
Herndon, M
Heuser, J
Hewamanage, S
Hidas, D
Hill, CS
Hirschbuehl, D
Hocker, A
Hou, S
Houlden, M
Hsu, SC
Huffman, BT
Hughes, RE
Husemann, U
Hussein, M
Huston, J
Incandela, J
Introzzi, G
Iori, M
Ivanov, A
James, E
Jang, D
Jayatilaka, B
Jeon, EJ
Jha, MK
Jindariani, S
Johnson, W
Jones, M
Joo, KK
Jun, SY
Jung, JE
Junk, TR
Kamon, T
Kar, D
Karchin, PE
Kato, Y
Kephart, R
Ketchum, W
Keung, J
Khotilovich, V
Kilminster, B
Kim, DH
Kim, HS
Kim, HW
Kim, JE
Kim, MJ
Kim, SB
Kim, SH
Kim, YK
Kimura, N
Kirsch, L
Klimenko, S
Knuteson, B
Ko, BR
Kondo, K
Kong, DJ
Konigsberg, J
Korytov, A
Kotwal, AV
Kraus, JA
Kreps, M
Kroll, J
Krop, D
Krumnack, N
Kruse, M
Krutelyov, V
Kubo, T
Kuhr, T
Kulkarni, NP
Kurata, M
Kwang, S
Laasanen, AT
Lami, S
Lammel, S
Lancaster, M
Lander, RL
Lannon, K
Lath, A
Latino, G
Lazzizzera, I
LeCompte, T
Lee, E
Lee, HS
Lee, SW
Leone, S
Lewis, JD
Lin, CS
Linacre, J
Lindgren, M
Lipeles, E
Lister, A
Litvintsev, DO
Liu, C
Liu, T
Lockyer, NS
Loginov, A
Loreti, M
Lovas, L
Lucchesi, D
Luci, C
Lueck, J
Lujan, P
Lukens, P
Lungu, G
Lyons, L
Lys, J
Lysak, R
MacQueen, D
Madrak, R
Maeshima, K
Makhoul, K
Maki, T
Maksimovic, P
Malde, S
Malik, S
Manca, G
Manousakis-Katsikakis, A
Margaroli, F
Marino, C
Marino, CP
Martin, A
Martin, V
Martinez, M
Martinez-Ballarin, R
Maruyama, T
Mastrandrea, P
Masubuchi, T
Mathis, M
Mattson, ME
Mazzanti, P
McFarland, KS
McIntyre, P
McNulty, R
Mehta, A
Mehtala, P
Menzione, A
Merkel, P
Mesropian, C
Miao, T
Miladinovic, N
Miller, R
Mills, C
Milnik, M
Mitra, A
Mitselmakher, G
Miyake, H
Moggi, N
Moon, CS
Moore, R
Morello, MJ
Morlock, J
Fernandez, PM
Mulmenstadt, J
Mukherjee, A
Muller, T
Mumford, R
Murat, P
Mussini, M
Nachtman, J
Nagai, Y
Nagano, A
Naganoma, J
Nakamura, K
Nakano, I
Napier, A
Necula, V
Nett, J
Neu, C
Neubauer, MS
Neubauer, S
Nielsen, J
Nodulman, I
Norman, M
Norniella, O
Nurse, E
Oakes, L
Oh, SH
Oh, YD
Oksuzian, I
Okusawa, T
Orava, R
Osterberg, K
Griso, SP
Palencia, E
Papadimitriou, V
Papaikonomou, A
Paramonov, AA
Parks, B
Pashapour, S
Patrick, J
Pauletta, G
Paulini, M
Paus, C
Peiffer, T
Pellett, DE
Penzo, A
Phillips, TJ
Piacentino, G
Pianori, E
Pinera, L
Pitts, K
Plager, C
Pondrom, L
Poukhov, O
Pounder, N
Prakoshyn, F
Pronko, A
Proudfoot, J
Ptohos, F
Pueschel, E
Punzi, G
Pursley, J
Rademacker, J
Rahaman, A
Ramakrishnan, V
Ranjan, N
Redondo, I
Renton, P
Renz, M
Rescigno, M
Richter, S
Rimondi, F
Ristori, L
Robson, A
Rodrigo, T
Rodriguez, T
Rogers, E
Rolli, S
Roser, R
Rossi, M
Rossin, R
Roy, P
Ruiz, A
Russ, J
Rusu, V
Rutherford, B
Saarikko, H
Safonov, A
Sakumoto, WK
Salto, O
Santi, L
Sarkar, S
Sartori, L
Sato, K
Savoy-Navarro, A
Schlabach, P
Schmidt, A
Schmidt, EE
Schmidt, MA
Schmidt, MP
Schmitt, M
Schwarz, T
Scodellaro, L
Scribano, A
Scuri, F
Sedov, A
Seidel, S
Seiya, Y
Semenov, A
Sexton-Kennedy, L
Sforza, F
Sfyrla, A
Shalhout, SZ
Shears, T
Shepard, PF
Shimojima, M
Shiraishi, S
Shochet, M
Shon, Y
Shreyber, I
Sinervo, P
Sisakyan, A
Slaughter, AJ
Slaunwhite, J
Sliwa, K
Smith, JR
Snider, FD
Snihur, R
Soha, A
Somalwar, S
Sorin, V
Spreitzer, T
Squillacioti, P
Stanitzki, M
Denis, RS
Stelzer, B
Stelzer-Chilton, O
Stentz, D
Strologas, J
Strycker, GL
Suh, JS
Sukhanov, A
Suslov, I
Suzuki, T
Taffard, A
Takashima, R
Takeuchi, Y
Tanaka, R
Tecchio, M
Teng, PK
Terashi, K
Thom, J
Thompson, AS
Thompson, GA
Thomson, E
Tipton, P
Ttito-Guzman, P
Tkaczyk, S
Toback, D
Tokar, S
Tollefson, K
Tomura, T
Tonelli, D
Torre, S
Torretta, D
Totaro, P
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Tsai, SY
Tu, Y
Turini, N
Ukegawa, F
Vallecorsa, S
van Remortel, N
Varganov, A
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Vazquez, F
Velev, G
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Vidal, R
Vila, I
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Vogel, M
Volobouev, I
Volpi, G
Wagner, P
Wagner, RG
Wagner, RL
Wagner, W
Wagner-Kuhr, J
Wakisaka, T
Wallny, R
Wang, SM
Warburton, A
Waters, D
Weinberger, M
Weinelt, J
Wester, WC
Whitehouse, B
Whiteson, D
Wicklund, AB
Wicklund, E
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Williams, G
Williams, HH
Wilson, P
Winer, BL
Wittich, P
Wolbers, S
Wolfe, C
Wright, T
Wu, X
Wurthwein, F
Xie, S
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Yamamoto, K
Yamaoka, J
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Yang, YC
Yao, WM
Yeh, GP
Yoh, J
Yorita, K
Yoshida, T
Yu, GB
Yu, I
Yu, SS
Yun, JC
Zanello, L
Zanetti, A
Zhang, X
Zheng, Y
Zucchelli, S
AF Aaltonen, T.
Adelman, J.
Akimoto, T.
Gonzalez, B. Alvarez
Amerio, S.
Amidei, D.
Anastassov, A.
Annovi, A.
Antos, J.
Apollinari, G.
Apresyan, A.
Arisawa, T.
Artikov, A.
Ashmanskas, W.
Attal, A.
Aurisano, A.
Azfar, F.
Badgett, W.
Barbaro-Galtieri, A.
Barnes, V. E.
Barnett, B. A.
Barria, P.
Bartsch, V.
Bauer, G.
Beauchemin, P. -H.
Bedeschi, F.
Beecher, D.
Behari, S.
Bellettini, G.
Bellinger, J.
Benjamin, D.
Beretvas, A.
Beringer, J.
Bhatti, A.
Binkley, M.
Bisello, D.
Bizjak, I.
Blair, R. E.
Blocker, C.
Blumenfeld, B.
Bocci, A.
Bodek, A.
Boisvert, V.
Bolla, G.
Bortoletto, D.
Boudreau, J.
Boveia, A.
Brau, B.
Bridgeman, A.
Brigliadori, L.
Bromberg, C.
Brubaker, E.
Budagov, J.
Budd, H. S.
Budd, S.
Burke, S.
Burkett, K.
Busetto, G.
Bussey, P.
Buzatu, A.
Byrum, K. L.
Cabrera, S.
Calancha, C.
Campanelli, M.
Campbell, M.
Canelli, F.
Canepa, A.
Carls, B.
Carlsmith, D.
Carosi, R.
Carrillo, S.
Carron, S.
Casal, B.
Casarsa, M.
Castro, A.
Catastini, P.
Cauz, D.
Cavaliere, V.
Cavalli-Sforza, M.
Cerri, A.
Cerrito, L.
Chang, S. H.
Chen, Y. C.
Chertok, M.
Chiarelli, G.
Chlachidze, G.
Chlebana, F.
Cho, K.
Chokheli, D.
Chou, J. P.
Choudalakis, G.
Chuang, S. H.
Chung, K.
Chung, W. H.
Chung, Y. S.
Chwalek, T.
Ciobanu, C. I.
Ciocci, M. A.
Clark, A.
Clark, D.
Compostella, G.
Convery, M. E.
Conway, J.
Cordelli, M.
Cortiana, G.
Cox, C. A.
Cox, D. J.
Crescioli, F.
Almenar, C. Cuenca
Cuevas, J.
Culbertson, R.
Cully, J. C.
Dagenhart, D.
Datta, M.
Davies, T.
de Barbaro, P.
De Cecco, S.
Deisher, A.
De Lorenzo, G.
Dell'Orso, M.
Deluca, C.
Demortier, L.
Deng, J.
Deninno, M.
Derwent, P. F.
Di Canto, A.
di Giovanni, G. P.
Dionisi, C.
Di Ruzza, B.
Dittmann, J. R.
D'Onofrio, M.
Donati, S.
Dong, P.
Donini, J.
Dorigo, T.
Dube, S.
Efron, J.
Elagin, A.
Erbacher, R.
Errede, D.
Errede, S.
Eusebi, R.
Fang, H. C.
Farrington, S.
Fedorko, W. T.
Feild, R. G.
Feindt, M.
Fernandez, J. P.
Ferrazza, C.
Field, R.
Flanagan, G.
Forrest, R.
Frank, M. J.
Franklin, M.
Freeman, J. C.
Furic, I.
Gallinaro, M.
Galyardt, J.
Garberson, F.
Garcia, J. E.
Garfinkel, A. F.
Garosi, P.
Genser, K.
Gerberich, H.
Gerdes, D.
Gessler, A.
Giagu, S.
Giakoumopoulou, V.
Giannetti, P.
Gibson, K.
Gimmell, J. L.
Ginsburg, C. M.
Giokaris, N.
Giordani, M.
Giromini, P.
Giunta, M.
Giurgiu, G.
Glagolev, V.
Glenzinski, D.
Gold, M.
Goldschmidt, N.
Golossanov, A.
Gomez, G.
Gomez-Ceballos, G.
Goncharov, M.
Gonzalez, O.
Gorelov, I.
Goshaw, A. T.
Goulianos, K.
Gresele, A.
Grinstein, S.
Grosso-Pilcher, C.
Group, R. C.
Grundler, U.
da Costa, J. Guimaraes
Gunay-Unalan, Z.
Haber, C.
Hahn, K.
Hahn, S. R.
Halkiadakis, E.
Han, B. -Y.
Han, J. Y.
Happacher, F.
Hara, K.
Hare, D.
Hare, M.
Harper, S.
Harr, R. F.
Harris, R. M.
Hartz, M.
Hatakeyama, K.
Hays, C.
Heck, M.
Heijboer, A.
Heinrich, J.
Henderson, C.
Herndon, M.
Heuser, J.
Hewamanage, S.
Hidas, D.
Hill, C. S.
Hirschbuehl, D.
Hocker, A.
Hou, S.
Houlden, M.
Hsu, S. -C.
Huffman, B. T.
Hughes, R. E.
Husemann, U.
Hussein, M.
Huston, J.
Incandela, J.
Introzzi, G.
Iori, M.
Ivanov, A.
James, E.
Jang, D.
Jayatilaka, B.
Jeon, E. J.
Jha, M. K.
Jindariani, S.
Johnson, W.
Jones, M.
Joo, K. K.
Jun, S. Y.
Jung, J. E.
Junk, T. R.
Kamon, T.
Kar, D.
Karchin, P. E.
Kato, Y.
Kephart, R.
Ketchum, W.
Keung, J.
Khotilovich, V.
Kilminster, B.
Kim, D. H.
Kim, H. S.
Kim, H. W.
Kim, J. E.
Kim, M. J.
Kim, S. B.
Kim, S. H.
Kim, Y. K.
Kimura, N.
Kirsch, L.
Klimenko, S.
Knuteson, B.
Ko, B. R.
Kondo, K.
Kong, D. J.
Konigsberg, J.
Korytov, A.
Kotwal, A. V.
Kraus, J. A.
Kreps, M.
Kroll, J.
Krop, D.
Krumnack, N.
Kruse, M.
Krutelyov, V.
Kubo, T.
Kuhr, T.
Kulkarni, N. P.
Kurata, M.
Kwang, S.
Laasanen, A. T.
Lami, S.
Lammel, S.
Lancaster, M.
Lander, R. L.
Lannon, K.
Lath, A.
Latino, G.
Lazzizzera, I.
LeCompte, T.
Lee, E.
Lee, H. S.
Lee, S. W.
Leone, S.
Lewis, J. D.
Lin, C. -S.
Linacre, J.
Lindgren, M.
Lipeles, E.
Lister, A.
Litvintsev, D. O.
Liu, C.
Liu, T.
Lockyer, N. S.
Loginov, A.
Loreti, M.
Lovas, L.
Lucchesi, D.
Luci, C.
Lueck, J.
Lujan, P.
Lukens, P.
Lungu, G.
Lyons, L.
Lys, J.
Lysak, R.
MacQueen, D.
Madrak, R.
Maeshima, K.
Makhoul, K.
Maki, T.
Maksimovic, P.
Malde, S.
Malik, S.
Manca, G.
Manousakis-Katsikakis, A.
Margaroli, F.
Marino, C.
Marino, C. P.
Martin, A.
Martin, V.
Martinez, M.
Martinez-Ballarin, R.
Maruyama, T.
Mastrandrea, P.
Masubuchi, T.
Mathis, M.
Mattson, M. E.
Mazzanti, P.
McFarland, K. S.
McIntyre, P.
McNulty, R.
Mehta, A.
Mehtala, P.
Menzione, A.
Merkel, P.
Mesropian, C.
Miao, T.
Miladinovic, N.
Miller, R.
Mills, C.
Milnik, M.
Mitra, A.
Mitselmakher, G.
Miyake, H.
Moggi, N.
Moon, C. S.
Moore, R.
Morello, M. J.
Morlock, J.
Fernandez, P. Movilla
Mulmenstadt, J.
Mukherjee, A.
Muller, Th.
Mumford, R.
Murat, P.
Mussini, M.
Nachtman, J.
Nagai, Y.
Nagano, A.
Naganoma, J.
Nakamura, K.
Nakano, I.
Napier, A.
Necula, V.
Nett, J.
Neu, C.
Neubauer, M. S.
Neubauer, S.
Nielsen, J.
Nodulman, I.
Norman, M.
Norniella, O.
Nurse, E.
Oakes, L.
Oh, S. H.
Oh, Y. D.
Oksuzian, I.
Okusawa, T.
Orava, R.
Osterberg, K.
Griso, S. Pagan
Palencia, E.
Papadimitriou, V.
Papaikonomou, A.
Paramonov, A. A.
Parks, B.
Pashapour, S.
Patrick, J.
Pauletta, G.
Paulini, M.
Paus, C.
Peiffer, T.
Pellett, D. E.
Penzo, A.
Phillips, T. J.
Piacentino, G.
Pianori, E.
Pinera, L.
Pitts, K.
Plager, C.
Pondrom, L.
Poukhov, O.
Pounder, N.
Prakoshyn, F.
Pronko, A.
Proudfoot, J.
Ptohos, F.
Pueschel, E.
Punzi, G.
Pursley, J.
Rademacker, J.
Rahaman, A.
Ramakrishnan, V.
Ranjan, N.
Redondo, I.
Renton, P.
Renz, M.
Rescigno, M.
Richter, S.
Rimondi, F.
Ristori, L.
Robson, A.
Rodrigo, T.
Rodriguez, T.
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TI Measurement of the b-hadron production cross section using decays to
mu(-DX)-X-0 final states in p(p)over-bar collisions at root s=1.96 TeV
SO PHYSICAL REVIEW D
LA English
DT Article
ID BOTTOM-QUARK PRODUCTION; BRANCHING FRACTIONS; ROOT-S; MESONS
AB We report a measurement of the production cross section for b hadrons in p (p) over bar collisions at root s = 1.96 TeV. Using a data sample derived from an integrated luminosity of 83 pb(-1) collected with the upgraded Collider Detector (CDF II) at the Fermilab Tevatron, we analyze b hadrons, H-b, partially reconstructed in the semileptonic decay mode H-b -> mu(-DX)-X-0. Our measurement of the inclusive production cross section for b hadrons with transverse momentum p(T) > 9 GeV/c and rapidity vertical bar y vertical bar < 0.6 is sigma 1.30 mu b +/- 0.05 mu b(stat) +/- 0.14 mu b(syst) +/- 0.07 mu b(B), where the uncertainties are statistical, systematic, and from branching fractions, respectively. The differential cross sections d sigma/dp(T) are found to be in good agreement with recent measurements of the Hb cross section and well described by fixed-order next-to-leading logarithm predictions.
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RI Grinstein, Sebastian/N-3988-2014; Paulini, Manfred/N-7794-2014; Russ,
James/P-3092-2014; unalan, zeynep/C-6660-2015; Cabrera Urban,
Susana/H-1376-2015; Garcia, Jose /H-6339-2015; ciocci, maria agnese
/I-2153-2015; Cavalli-Sforza, Matteo/H-7102-2015; Muelmenstaedt,
Johannes/K-2432-2015; Introzzi, Gianluca/K-2497-2015; Gorelov,
Igor/J-9010-2015; Canelli, Florencia/O-9693-2016; Ruiz,
Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco,
Sandro/B-1016-2012; manca, giulia/I-9264-2012; Amerio,
Silvia/J-4605-2012; Punzi, Giovanni/J-4947-2012; Annovi,
Alberto/G-6028-2012; Ivanov, Andrew/A-7982-2013; Warburton,
Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014; Lysak,
Roman/H-2995-2014; Moon, Chang-Seong/J-3619-2014; Scodellaro,
Luca/K-9091-2014
OI Grinstein, Sebastian/0000-0002-6460-8694; Paulini,
Manfred/0000-0002-6714-5787; Russ, James/0000-0001-9856-9155; unalan,
zeynep/0000-0003-2570-7611; ciocci, maria agnese /0000-0003-0002-5462;
Muelmenstaedt, Johannes/0000-0003-1105-6678; Introzzi,
Gianluca/0000-0002-1314-2580; Gorelov, Igor/0000-0001-5570-0133;
Canelli, Florencia/0000-0001-6361-2117; Ruiz,
Alberto/0000-0002-3639-0368; Punzi, Giovanni/0000-0002-8346-9052;
Annovi, Alberto/0000-0002-4649-4398; Ivanov, Andrew/0000-0002-9270-5643;
Warburton, Andreas/0000-0002-2298-7315; Moon,
Chang-Seong/0000-0001-8229-7829; Scodellaro, Luca/0000-0002-4974-8330
FU U. S. Department of Energy; National Science Foundation; Italian
Istituto Nazionale di Fisica Nucleare; Ministry of Education, Culture,
Sports, Science and Technology of Japan; Natural Sciences and
Engineering Research Council of Canada; National Science Council of the
Republic of China; Swiss National Science Foundation; A. P. Sloan
Foundation; the Bundesministerium fur Bildung und Forschung, Germany;
Korean Science and Engineering Foundation; Korean Research Foundation;
Science and Technology Facilities Council and the Royal Society, UK;
Institut National de Physique Nucleaire et Physique des Particules/CNRS;
Russian Foundation for Basic Research; the Ministerio de Ciencia e
Innovacion; Programa Consolider-Ingenio 2010, Spain; Slovak RD Agency;
Academy of Finland
FX We thank the Fermilab staff and the technical staffs of the
participating institutions for their vital contributions. This work was
supported by the U. S. Department of Energy and National Science
Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the
Ministry of Education, Culture, Sports, Science and Technology of Japan;
the Natural Sciences and Engineering Research Council of Canada; the
National Science Council of the Republic of China; the Swiss National
Science Foundation; the A. P. Sloan Foundation; the Bundesministerium
fur Bildung und Forschung, Germany; the Korean Science and Engineering
Foundation and the Korean Research Foundation; the Science and
Technology Facilities Council and the Royal Society, UK; the Institut
National de Physique Nucleaire et Physique des Particules/CNRS; the
Russian Foundation for Basic Research; the Ministerio de Ciencia e
Innovacion, and Programa Consolider-Ingenio 2010, Spain; the Slovak R&D
Agency; and the Academy of Finland.
NR 49
TC 21
Z9 21
U1 1
U2 9
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 092003
DI 10.1103/PhysRevD.79.092003
PG 21
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800007
ER
PT J
AU Abbasi, R
Abdou, Y
Ackermann, M
Adams, J
Ahlers, M
Andeen, K
Auffenberg, J
Bai, X
Baker, M
Barwick, SW
Bay, R
Alba, JLB
Beattie, K
Bechet, S
Becker, JK
Becker, KH
Benabderrahmane, ML
Berdermann, J
Berghaus, P
Berley, D
Bernardini, E
Bertrand, D
Besson, DZ
Bissok, M
Blaufuss, E
Boersma, DJ
Bohm, C
Bolmont, J
Boser, S
Botner, O
Bradley, L
Braun, J
Breder, D
Burgess, T
Castermans, T
Chirkin, D
Christy, B
Clem, J
Cohen, S
Cowen, DF
D'Agostino, MV
Danninger, M
Day, CT
De Clercq, C
Demirors, L
Depaepe, O
Descamps, F
Desiati, P
de Vries-Uiterweerd, G
DeYoung, T
Diaz-Velez, JC
Dreyer, J
Dumm, JP
Duvoort, MR
Edwards, WR
Ehrlich, R
Eisch, J
Ellsworth, RW
Engdegard, O
Euler, S
Evenson, PA
Fadiran, O
Fazely, AR
Feusels, T
Filimonov, K
Finley, C
Foerster, MM
Fox, BD
Franckowiak, A
Franke, R
Gaisser, TK
Gallagher, J
Ganugapati, R
Gerhardt, L
Gladstone, L
Goldschmidt, A
Goodman, JA
Gozzini, R
Grant, D
Griesel, T
Gross, A
Grullon, S
Gunasingha, RM
Gurtner, M
Ha, C
Hallgren, A
Halzen, F
Han, K
Hanson, K
Hasegawa, Y
Heise, J
Helbing, K
Herquet, P
Hickford, S
Hill, GC
Hoffman, KD
Hoshina, K
Hubert, D
Huelsnitz, W
Hulss, JP
Hulth, PO
Hultqvist, K
Hussain, S
Imlay, RL
Inaba, M
Ishihara, A
Jacobsen, J
Japaridze, GS
Johansson, H
Joseph, JM
Kampert, KH
Kappes, A
Karg, T
Karle, A
Kelley, JL
Kenny, P
Kiryluk, J
Kislat, F
Klein, SR
Klepser, S
Knops, S
Kohnen, G
Kolanoski, H
Kopke, L
Kowalski, M
Kowarik, T
Krasberg, M
Kuehn, K
Kuwabara, T
Labare, M
Laihem, K
Landsman, H
Lauer, R
Leich, H
Lennarz, D
Lucke, A
Lundberg, J
Lunemann, J
Madsen, J
Majumdar, P
Maruyama, R
Mase, K
Matis, HS
McParland, CP
Meagher, K
Merck, M
Meszaros, P
Middell, E
Milke, N
Miyamoto, H
Mohr, A
Montaruli, T
Morse, R
Movit, SM
Munich, K
Nahnhauer, R
Nam, JW
Niessen, P
Nygren, DR
Odrowski, S
Olivas, A
Olivo, M
Ono, M
Panknin, S
Patton, S
de los Heros, CP
Petrovic, J
Piegsa, A
Pieloth, D
Pohl, AC
Porrata, R
Potthoff, N
Price, PB
Prikockis, M
Przybylski, GT
Rawlins, K
Redl, P
Resconi, E
Rhode, W
Ribordy, M
Rizzo, A
Rodrigues, JP
Roth, P
Rothmaier, F
Rott, C
Roucelle, C
Rutledge, D
Ryckbosch, D
Sander, HG
Sarkar, S
Satalecka, K
Schlenstedt, S
Schmidt, T
Schneider, D
Schukraft, A
Schulz, O
Schunck, M
Seckel, D
Semburg, B
Seo, SH
Sestayo, Y
Seunarine, S
Silvestri, A
Slipak, A
Spiczak, GM
Spiering, C
Stanev, T
Stephens, G
Stezelberger, T
Stokstad, RG
Stoufer, MC
Stoyanov, S
Strahler, EA
Straszheim, T
Sulanke, KH
Sullivan, GW
Swillens, Q
Taboada, I
Tarasova, O
Tepe, A
Ter-Antonyan, S
Terranova, C
Tilav, S
Tluczykont, M
Toale, PA
Tosi, D
Turcan, D
van Eijndhoven, N
Vandenbroucke, J
Van Overloop, A
Voigt, B
Walck, C
Waldenmaier, T
Walter, M
Wendt, C
Westerhoff, S
Whitehorn, N
Wiebusch, CH
Wiedemann, A
Wikstrom, G
Williams, DR
Wischnewski, R
Wissing, H
Woschnagg, K
Xu, XW
Yodh, G
Yoshida, S
AF Abbasi, R.
Abdou, Y.
Ackermann, M.
Adams, J.
Ahlers, M.
Andeen, K.
Auffenberg, J.
Bai, X.
Baker, M.
Barwick, S. W.
Bay, R.
Alba, J. L. Bazo
Beattie, K.
Bechet, S.
Becker, J. K.
Becker, K. -H.
Benabderrahmane, M. L.
Berdermann, J.
Berghaus, P.
Berley, D.
Bernardini, E.
Bertrand, D.
Besson, D. Z.
Bissok, M.
Blaufuss, E.
Boersma, D. J.
Bohm, C.
Bolmont, J.
Boeser, S.
Botner, O.
Bradley, L.
Braun, J.
Breder, D.
Burgess, T.
Castermans, T.
Chirkin, D.
Christy, B.
Clem, J.
Cohen, S.
Cowen, D. F.
D'Agostino, M. V.
Danninger, M.
Day, C. T.
De Clercq, C.
Demiroers, L.
Depaepe, O.
Descamps, F.
Desiati, P.
de Vries-Uiterweerd, G.
DeYoung, T.
Diaz-Velez, J. C.
Dreyer, J.
Dumm, J. P.
Duvoort, M. R.
Edwards, W. R.
Ehrlich, R.
Eisch, J.
Ellsworth, R. W.
Engdegard, O.
Euler, S.
Evenson, P. A.
Fadiran, O.
Fazely, A. R.
Feusels, T.
Filimonov, K.
Finley, C.
Foerster, M. M.
Fox, B. D.
Franckowiak, A.
Franke, R.
Gaisser, T. K.
Gallagher, J.
Ganugapati, R.
Gerhardt, L.
Gladstone, L.
Goldschmidt, A.
Goodman, J. A.
Gozzini, R.
Grant, D.
Griesel, T.
Gross, A.
Grullon, S.
Gunasingha, R. M.
Gurtner, M.
Ha, C.
Hallgren, A.
Halzen, F.
Han, K.
Hanson, K.
Hasegawa, Y.
Heise, J.
Helbing, K.
Herquet, P.
Hickford, S.
Hill, G. C.
Hoffman, K. D.
Hoshina, K.
Hubert, D.
Huelsnitz, W.
Huelss, J. -P.
Hulth, P. O.
Hultqvist, K.
Hussain, S.
Imlay, R. L.
Inaba, M.
Ishihara, A.
Jacobsen, J.
Japaridze, G. S.
Johansson, H.
Joseph, J. M.
Kampert, K. -H.
Kappes, A.
Karg, T.
Karle, A.
Kelley, J. L.
Kenny, P.
Kiryluk, J.
Kislat, F.
Klein, S. R.
Klepser, S.
Knops, S.
Kohnen, G.
Kolanoski, H.
Koepke, L.
Kowalski, M.
Kowarik, T.
Krasberg, M.
Kuehn, K.
Kuwabara, T.
Labare, M.
Laihem, K.
Landsman, H.
Lauer, R.
Leich, H.
Lennarz, D.
Lucke, A.
Lundberg, J.
Luenemann, J.
Madsen, J.
Majumdar, P.
Maruyama, R.
Mase, K.
Matis, H. S.
McParland, C. P.
Meagher, K.
Merck, M.
Meszaros, P.
Middell, E.
Milke, N.
Miyamoto, H.
Mohr, A.
Montaruli, T.
Morse, R.
Movit, S. M.
Muenich, K.
Nahnhauer, R.
Nam, J. W.
Niessen, P.
Nygren, D. R.
Odrowski, S.
Olivas, A.
Olivo, M.
Ono, M.
Panknin, S.
Patton, S.
de los Heros, C. Perez
Petrovic, J.
Piegsa, A.
Pieloth, D.
Pohl, A. C.
Porrata, R.
Potthoff, N.
Price, P. B.
Prikockis, M.
Przybylski, G. T.
Rawlins, K.
Redl, P.
Resconi, E.
Rhode, W.
Ribordy, M.
Rizzo, A.
Rodrigues, J. P.
Roth, P.
Rothmaier, F.
Rott, C.
Roucelle, C.
Rutledge, D.
Ryckbosch, D.
Sander, H. -G.
Sarkar, S.
Satalecka, K.
Schlenstedt, S.
Schmidt, T.
Schneider, D.
Schukraft, A.
Schulz, O.
Schunck, M.
Seckel, D.
Semburg, B.
Seo, S. H.
Sestayo, Y.
Seunarine, S.
Silvestri, A.
Slipak, A.
Spiczak, G. M.
Spiering, C.
Stanev, T.
Stephens, G.
Stezelberger, T.
Stokstad, R. G.
Stoufer, M. C.
Stoyanov, S.
Strahler, E. A.
Straszheim, T.
Sulanke, K. -H.
Sullivan, G. W.
Swillens, Q.
Taboada, I.
Tarasova, O.
Tepe, A.
Ter-Antonyan, S.
Terranova, C.
Tilav, S.
Tluczykont, M.
Toale, P. A.
Tosi, D.
Turcan, D.
van Eijndhoven, N.
Vandenbroucke, J.
Van Overloop, A.
Voigt, B.
Walck, C.
Waldenmaier, T.
Walter, M.
Wendt, C.
Westerhoff, S.
Whitehorn, N.
Wiebusch, C. H.
Wiedemann, A.
Wikstrom, G.
Williams, D. R.
Wischnewski, R.
Wissing, H.
Woschnagg, K.
Xu, X. W.
Yodh, G.
Yoshida, S.
CA IceCube Collaboration
TI Determination of the atmospheric neutrino flux and searches for new
physics with AMANDA-II
SO PHYSICAL REVIEW D
LA English
DT Article
ID LORENTZ INVARIANCE VIOLATION; QUANTUM DECOHERENCE; CONFIDENCE-INTERVALS;
SMALL SIGNALS; OSCILLATIONS; TELESCOPE; GRAVITY; SENSITIVITY;
SCATTERING; GENERATOR
AB The AMANDA-II detector, operating since 2000 in the deep ice at the geographic South Pole, has accumulated a large sample of atmospheric muon neutrinos in the 100 GeV to 10 TeV energy range. The zenith angle and energy distribution of these events can be used to search for various phenomenological signatures of quantum gravity in the neutrino sector, such as violation of Lorentz invariance or quantum decoherence. Analyzing a set of 5511 candidate neutrino events collected during 1387 days of livetime from 2000 to 2006, we find no evidence for such effects and set upper limits on violation of Lorentz invariance and quantum decoherence parameters using a maximum likelihood method. Given the absence of evidence for new flavor-changing physics, we use the same methodology to determine the conventional atmospheric muon neutrino flux above 100 GeV.
C1 [Williams, D. R.] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA.
[Rawlins, K.] Univ Alaska, Dept Phys & Astron, Anchorage, AK 99508 USA.
[Fadiran, O.; Japaridze, G. S.] Clark Atlanta Univ, CTSPS, Atlanta, GA 30314 USA.
[Taboada, I.] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA.
[Fazely, A. R.; Gunasingha, R. M.; Imlay, R. L.; Ter-Antonyan, S.; Xu, X. W.] Southern Univ, Dept Phys, Baton Rouge, LA 70813 USA.
[Bay, R.; D'Agostino, M. V.; Filimonov, K.; Gerhardt, L.; Kiryluk, J.; Klein, S. R.; Porrata, R.; Price, P. B.; Vandenbroucke, J.; Woschnagg, K.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Beattie, K.; Day, C. T.; Edwards, W. R.; Gerhardt, L.; Goldschmidt, A.; Joseph, J. M.; Kiryluk, J.; Klein, S. R.; Matis, H. S.; McParland, C. P.; Nygren, D. R.; Patton, S.; Przybylski, G. T.; Stezelberger, T.; Stokstad, R. G.; Stoufer, M. C.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Franckowiak, A.; Kolanoski, H.; Kowalski, M.; Lucke, A.; Mohr, A.; Panknin, S.; Waldenmaier, T.] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany.
[Bechet, S.; Bertrand, D.; Labare, M.; Petrovic, J.; Swillens, Q.] Univ Libre Bruxelles, Sci Fac CP230, B-1050 Brussels, Belgium.
[De Clercq, C.; Depaepe, O.; Hubert, D.; Rizzo, A.] Vrije Univ Brussels, Dienst ELEM, B-1050 Brussels, Belgium.
[Hasegawa, Y.; Inaba, M.; Ishihara, A.; Mase, K.; Miyamoto, H.; Ono, M.; Yoshida, S.] Chiba Univ, Dept Phys, Chiba 2638522, Japan.
[Adams, J.; Danninger, M.; Gross, A.; Han, K.; Hickford, S.; Seunarine, S.] Univ Canterbury, Dept Phys & Astron, Christchurch 1, New Zealand.
[Berley, D.; Blaufuss, E.; Christy, B.; Ehrlich, R.; Ellsworth, R. W.; Goodman, J. A.; Hoffman, K. D.; Huelsnitz, W.; Meagher, K.; Olivas, A.; Redl, P.; Roth, P.; Schmidt, T.; Straszheim, T.; Sullivan, G. W.; Turcan, D.; Wissing, H.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
[Kuehn, K.; Rott, C.] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
[Becker, J. K.; Dreyer, J.; Milke, N.; Muenich, K.; Rhode, W.; Wiedemann, A.] TU Dortmund Univ, Dept Phys, D-44221 Dortmund, Germany.
[Abdou, Y.; Descamps, F.; de Vries-Uiterweerd, G.; Feusels, T.; Ryckbosch, D.; Van Overloop, A.] Univ Ghent, Dept Subatom & Radiat Phys, B-9000 Ghent, Belgium.
[Gross, A.; Odrowski, S.; Resconi, E.; Roucelle, C.; Schulz, O.; Sestayo, Y.] Max Planck Inst Kernphys, D-69177 Heidelberg, Germany.
[Barwick, S. W.; Nam, J. W.; Silvestri, A.; Yodh, G.] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
[Demiroers, L.; Ribordy, M.; Terranova, C.] Ecole Polytech Fed Lausanne, High Energy Phys Lab, CH-1015 Lausanne, Switzerland.
[Besson, D. Z.; Kenny, P.] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA.
[Gallagher, J.] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA.
[Abbasi, R.; Andeen, K.; Baker, M.; Berghaus, P.; Boersma, D. J.; Braun, J.; Chirkin, D.; Desiati, P.; Diaz-Velez, J. C.; Dumm, J. P.; Eisch, J.; Finley, C.; Ganugapati, R.; Gladstone, L.; Grullon, S.; Halzen, F.; Hanson, K.; Hill, G. C.; Hoshina, K.; Jacobsen, J.; Kappes, A.; Karle, A.; Kelley, J. L.; Krasberg, M.; Landsman, H.; Maruyama, R.; Merck, M.; Montaruli, T.; Morse, R.; Rodrigues, J. P.; Schneider, D.; Strahler, E. A.; Wendt, C.; Westerhoff, S.; Whitehorn, N.] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
[Gozzini, R.; Griesel, T.; Koepke, L.; Kowarik, T.; Luenemann, J.; Piegsa, A.; Rothmaier, F.; Sander, H. -G.] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany.
[Castermans, T.; Herquet, P.; Kohnen, G.] Univ Mons, B-7000 Mons, Belgium.
[Bai, X.; Clem, J.; Cohen, S.; Evenson, P. A.; Gaisser, T. K.; Hussain, S.; Kuwabara, T.; Niessen, P.; Seckel, D.; Stanev, T.; Stoyanov, S.; Tilav, S.] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA.
[Madsen, J.; Spiczak, G. M.] Univ Wisconsin, Dept Phys, River Falls, WI 54022 USA.
[Bohm, C.; Burgess, T.; Hulth, P. O.; Hultqvist, K.; Johansson, H.; Nygren, D. R.; Seo, S. H.; Walck, C.; Wikstrom, G.] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden.
[Cowen, D. F.; Meszaros, P.; Movit, S. M.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Bradley, L.; Cowen, D. F.; DeYoung, T.; Foerster, M. M.; Fox, B. D.; Grant, D.; Ha, C.; Meszaros, P.; Prikockis, M.; Rutledge, D.; Slipak, A.; Stephens, G.; Toale, P. A.] Penn State Univ, Dept Phys, University Pk, PA 16802 USA.
[Botner, O.; Engdegard, O.; Hallgren, A.; Lundberg, J.; Olivo, M.; de los Heros, C. Perez; Pohl, A. C.] Uppsala Univ, Dept Phys & Astron, S-75120 Uppsala, Sweden.
[Duvoort, M. R.; Heise, J.; van Eijndhoven, N.] Utrecht Univ SRON, Dept Phys & Astron, NL-3584 CC Utrecht, Netherlands.
[Auffenberg, J.; Becker, K. -H.; Breder, D.; Gurtner, M.; Helbing, K.; Kampert, K. -H.; Karg, T.; Potthoff, N.; Semburg, B.; Tepe, A.] Univ Gesamthsch Wuppertal, Dept Phys, D-42119 Wuppertal, Germany.
[Ackermann, M.; Alba, J. L. Bazo; Benabderrahmane, M. L.; Berdermann, J.; Bernardini, E.; Bolmont, J.; Boeser, S.; Franke, R.; Kislat, F.; Klepser, S.; Lauer, R.; Leich, H.; Majumdar, P.; Middell, E.; Nahnhauer, R.; Pieloth, D.; Satalecka, K.; Schlenstedt, S.; Spiering, C.; Sulanke, K. -H.; Tarasova, O.; Tluczykont, M.; Tosi, D.; Voigt, B.; Walter, M.; Wischnewski, R.] DESY, D-15735 Zeuthen, Germany.
[Bissok, M.; Euler, S.; Huelss, J. -P.; Knops, S.; Laihem, K.; Lennarz, D.; Schukraft, A.; Schunck, M.; Wiebusch, C. H.; Wissing, H.] Univ Aachen, Rhein Westfal TH Aachen, Inst Phys 3, D-52056 Aachen, Germany.
[Taboada, I.] Georgia Inst Technol, Ctr Relativist Astrophys, Atlanta, GA 30332 USA.
[Kuehn, K.; Rott, C.] Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA.
[Bai, X.; Clem, J.; Cohen, S.; Evenson, P. A.; Gaisser, T. K.; Hussain, S.; Kuwabara, T.; Niessen, P.; Seckel, D.; Stanev, T.; Stoyanov, S.; Tilav, S.] Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA.
[Ahlers, M.; Sarkar, S.] Univ Oxford, Dept Phys, Oxford OX1 3NP, England.
RP Kelley, JL (reprint author), Univ Wisconsin, Dept Phys, 1150 Univ Ave, Madison, WI 53706 USA.
EM jkelley@icecube.wisc.edu
RI Wiebusch, Christopher/G-6490-2012; Kowalski, Marek/G-5546-2012; Botner,
Olga/A-9110-2013; Hallgren, Allan/A-8963-2013; Tjus, Julia/G-8145-2012;
Auffenberg, Jan/D-3954-2014; Maruyama, Reina/A-1064-2013; Sarkar,
Subir/G-5978-2011
OI Ter-Antonyan, Samvel/0000-0002-5788-1369; Schukraft,
Anne/0000-0002-9112-5479; Perez de los Heros,
Carlos/0000-0002-2084-5866; Hubert, Daan/0000-0002-4365-865X;
Benabderrahmane, Mohamed Lotfi/0000-0003-4410-5886; Wiebusch,
Christopher/0000-0002-6418-3008; Auffenberg, Jan/0000-0002-1185-9094;
Maruyama, Reina/0000-0003-2794-512X; Sarkar, Subir/0000-0002-3542-858X
NR 88
TC 52
Z9 52
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 10
AR 102005
DI 10.1103/PhysRevD.79.102005
PG 15
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WP
UT WOS:000266501900011
ER
PT J
AU Abraham, J
Abreu, P
Aglietta, M
Aguirre, C
Ahn, EJ
Allard, D
Allekotte, I
Allen, J
Allison, P
Alvarez-Muniz, J
Ambrosio, M
Anchordoqui, L
Andringa, S
Anzalone, A
Aramo, C
Argiro, S
Arisaka, K
Arneodo, F
Arqueros, F
Asch, T
Asorey, H
Assis, P
Aublin, J
Ave, M
Avila, G
Backer, T
Badagnani, D
Barber, KB
Barbosa, AF
Barroso, SLC
Baughman, B
Bauleo, P
Beatty, JJ
Beau, T
Becker, BR
Becker, KH
Belletoile, A
Bellido, JA
BenZvi, S
Berat, C
Bernardini, P
Bertou, X
Biermann, PL
Billoir, P
Blanch-Bigas, O
Blanco, F
Bleve, C
Blumer, H
Bohacova, M
Bonifazi, C
Bonino, R
Brack, J
Brogueira, P
Brown, WC
Bruijn, R
Buchholz, P
Bueno, A
Burton, RE
Busca, NG
Caballero-Mora, KS
Caramete, L
Caruso, R
Carvalho, W
Castellina, A
Catalano, O
Cazon, L
Cester, R
Chauvin, J
Chiavassa, A
Chinellato, JA
Chou, A
Chudoba, J
Chye, J
Clay, RW
Colombo, E
Conceicao, R
Connolly, B
Contreras, F
Coppens, J
Cordier, A
Cotti, U
Coutu, S
Covault, CE
Creusot, A
Criss, A
Cronin, J
Curutiu, A
Dagoret-Campagne, S
Daumiller, K
Dawson, BR
de Almeida, RM
De Domenico, M
De Donato, C
de Jong, SJ
De La Vega, G
de Mello, WJM
de Mello Neto, JRT
De Mitri, I
de Souza, V
Decerprit, G
del Peral, L
Deligny, O
Della Selva, A
Delle Fratte, C
Dembinski, H
Di Giulio, C
Diaz, JC
Diep, PN
Dobrigkeit, C
D'Olivo, JC
Dong, PN
Dornic, D
Dorofeev, A
dos Anjos, JC
Dova, MT
D'Urso, D
Dutan, I
DuVernois, MA
Engel, R
Erdmann, M
Escobar, CO
Etchegoyen, A
Luis, PFS
Falcke, H
Farrar, G
Fauth, AC
Fazzini, N
Ferrer, F
Ferrero, A
Fick, B
Filevich, A
Filipcic, A
Fleck, I
Fliescher, S
Fracchiolla, CE
Fraenkel, ED
Fulgione, W
Gamarra, RF
Gambetta, S
Garcia, B
Gamez, DG
Garcia-Pinto, D
Garrido, X
Gelmini, G
Gemmeke, H
Ghia, PL
Giaccari, U
Giller, M
Glass, H
Goggin, LM
Gold, MS
Golup, G
Albarracin, FG
Berisso, MG
Goncalves, P
do Amaral, MG
Gonzalez, D
Gonzalez, JG
Gora, D
Gorgi, A
Gouffon, P
Grebe, S
Grigat, M
Grillo, AF
Guardincerri, Y
Guarino, F
Guedes, GP
Gutierrez, J
Hague, JD
Halenka, V
Hansen, P
Harari, D
Harmsma, S
Harton, JL
Haungs, A
Healy, MD
Hebbeker, T
Hebrero, G
Heck, D
Hojvat, C
Holmes, VC
Homola, P
Horandel, JR
Horneffer, A
Hrabovsky, M
Huege, T
Hussain, M
Iarlori, M
Insolia, A
Ionita, F
Italiano, A
Jiraskova, S
Kaducak, M
Kampert, KH
Karova, T
Kasper, P
Kegl, B
Keilhauer, B
Kemp, E
Kieckhafer, RM
Klages, HO
Kleifges, M
Kleinfeller, J
Knapik, R
Knapp, J
Koang, DH
Krieger, A
Kromer, O
Kruppke, D
Kuempel, D
Kunka, N
Kusenko, A
La Rosa, G
Lachaud, C
Lago, BL
Leao, MSAB
Lebrun, D
Lebrun, P
Lee, J
de Oliveira, MAL
Lemiere, A
Letessier-Selvon, A
Leuthold, M
Lhenry-Yvon, I
Lopez, R
Aguera, AL
Bahilo, JL
Lucero, A
Garcia, RL
Maccarone, MC
Macolino, C
Maldera, S
Mandat, D
Mantsch, P
Mariazzi, AG
Maris, IC
Falcon, HRM
Martello, D
Martinez, J
Bravo, OM
Mathes, HJ
Matthews, J
Matthews, JAJ
Matthiae, G
Maurizio, D
Mazur, PO
McEwen, M
McNeil, RR
Medina-Tanco, G
Melissas, M
Melo, D
Menichetti, E
Menshikov, A
Meyhandan, R
Micheletti, MI
Miele, G
Miller, W
Miramonti, L
Mollerach, S
Monasor, M
Ragaigne, DM
Montanet, F
Morales, B
Morello, C
Moreno, JC
Morris, C
Mostafa, M
Mueller, S
Muller, MA
Mussa, R
Navarra, G
Navarro, JL
Navas, S
Necesal, P
Nellen, L
Newman-Holmes, C
Newton, D
Nhung, PT
Nierstenhoefer, N
Nitz, D
Nosek, D
Nozka, L
Oehlschlager, J
Olinto, A
Olmos-Gilbaja, VM
Ortiz, M
Ortolani, F
Pacheco, N
Selmi-Dei, DP
Palatka, M
Pallotta, J
Parente, G
Parizot, E
Parlati, S
Pastor, S
Patel, M
Paul, T
Pavlidou, V
Payet, K
Pech, M
Pekala, J
Pelayo, R
Pepe, IM
Perrone, L
Pesce, R
Petermann, E
Petrera, S
Petrinca, P
Petrolini, A
Petrov, Y
Petrovic, J
Pfendner, C
Pichel, A
Piegaia, R
Pierog, T
Pimenta, M
Pinto, T
Pirronello, V
Pisanti, O
Platino, M
Pochon, J
Ponce, VH
Pontz, M
Privitera, P
Prouza, M
Quel, EJ
Rautenberg, J
Ravignani, D
Redondo, A
Reucroft, S
Revenu, B
Rezende, FAS
Ridky, J
Riggi, S
Risse, M
Riviere, C
Rizi, V
Robledo, C
Rodriguez, G
Martino, JR
Rojo, JR
Rodriguez-Cabo, I
Rodriguez-Frias, MD
Ros, G
Rosado, J
Roth, M
Rouille-d'Orfeuil, B
Roulet, E
Rovero, AC
Salamida, F
Salazar, H
Salina, G
Sanchez, F
Santander, M
Santo, CE
Santos, EM
Sarazin, F
Sarkar, S
Sato, R
Scharf, N
Scherini, V
Schieler, H
Schiffer, P
Schmidt, A
Schmidt, F
Schmidt, T
Scholten, O
Schoorlemmer, H
Schovancova, J
Schovanek, P
Schroeder, F
Schulte, S
Schussler, F
Schuster, D
Sciutto, SJ
Scuderi, M
Segreto, A
Semikoz, D
Settimo, M
Shellard, RC
Sidelnik, I
Siffert, BB
De Grande, NS
Smialkowski, A
Smida, R
Smith, BE
Snow, GR
Sommers, P
Sorokin, J
Spinka, H
Squartini, R
Strazzeri, E
Stutz, A
Suarez, F
Suomijarvi, T
Supanitsky, AD
Sutherland, MS
Swain, J
Szadkowski, Z
Tamashiro, A
Tamburro, A
Tarutina, T
Tascau, O
Tcaciuc, R
Tcherniakhovski, D
Thao, NT
Thomas, D
Ticona, R
Tiffenberg, J
Timmermans, C
Tkaczyk, W
Peixoto, CJT
Tome, B
Tonachini, A
Torres, I
Travnicek, P
Tridapalli, DB
Tristram, G
Trovato, E
Tuci, V
Tueros, M
Ulrich, R
Unger, M
Urban, M
Galicia, JFV
Valino, I
Valore, L
van den Berg, AM
van Elewyck, V
Vazquez, RA
Veberic, D
Velarde, A
Venters, T
Verzi, V
Videla, M
Villasenor, L
Vorobiov, S
Voyvodic, L
Wahlberg, H
Wahrlich, P
Wainberg, O
Warner, D
Watson, AA
Westerhoff, S
Whelan, BJ
Wieczorek, G
Wiencke, L
Wilczynska, B
Wilczynski, H
Wileman, C
Winnick, MG
Wu, H
Wundheiler, B
Younk, P
Yuan, G
Zas, E
Zavrtanik, D
Zavrtanik, M
Zaw, I
Zepeda, A
Ziolkowski, M
AF Abraham, J.
Abreu, P.
Aglietta, M.
Aguirre, C.
Ahn, E. J.
Allard, D.
Allekotte, I.
Allen, J.
Allison, P.
Alvarez-Muniz, J.
Ambrosio, M.
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Andringa, S.
Anzalone, A.
Aramo, C.
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Arqueros, F.
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Asorey, H.
Assis, P.
Aublin, J.
Ave, M.
Avila, G.
Baecker, T.
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Barber, K. B.
Barbosa, A. F.
Barroso, S. L. C.
Baughman, B.
Bauleo, P.
Beatty, J. J.
Beau, T.
Becker, B. R.
Becker, K. H.
Belletoile, A.
Bellido, J. A.
BenZvi, S.
Berat, C.
Bernardini, P.
Bertou, X.
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Blanch-Bigas, O.
Blanco, F.
Bleve, C.
Bluemer, H.
Bohacova, M.
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Bonino, R.
Brack, J.
Brogueira, P.
Brown, W. C.
Bruijn, R.
Buchholz, P.
Bueno, A.
Burton, R. E.
Busca, N. G.
Caballero-Mora, K. S.
Caramete, L.
Caruso, R.
Carvalho, W.
Castellina, A.
Catalano, O.
Cazon, L.
Cester, R.
Chauvin, J.
Chiavassa, A.
Chinellato, J. A.
Chou, A.
Chudoba, J.
Chye, J.
Clay, R. W.
Colombo, E.
Conceicao, R.
Connolly, B.
Contreras, F.
Coppens, J.
Cordier, A.
Cotti, U.
Coutu, S.
Covault, C. E.
Creusot, A.
Criss, A.
Cronin, J.
Curutiu, A.
Dagoret-Campagne, S.
Daumiller, K.
Dawson, B. R.
de Almeida, R. M.
De Domenico, M.
De Donato, C.
de Jong, S. J.
De La Vega, G.
de Mello, W. J. M., Jr.
de Mello Neto, J. R. T.
De Mitri, I.
de Souza, V.
Decerprit, G.
del Peral, L.
Deligny, O.
Della Selva, A.
Delle Fratte, C.
Dembinski, H.
Di Giulio, C.
Diaz, J. C.
Diep, P. N.
Dobrigkeit, C.
D'Olivo, J. C.
Dong, P. N.
Dornic, D.
Dorofeev, A.
dos Anjos, J. C.
Dova, M. T.
D'Urso, D.
Dutan, I.
DuVernois, M. A.
Engel, R.
Erdmann, M.
Escobar, C. O.
Etchegoyen, A.
San Luis, P. Facal
Falcke, H.
Farrar, G.
Fauth, A. C.
Fazzini, N.
Ferrer, F.
Ferrero, A.
Fick, B.
Filevich, A.
Filipcic, A.
Fleck, I.
Fliescher, S.
Fracchiolla, C. E.
Fraenkel, E. D.
Fulgione, W.
Gamarra, R. F.
Gambetta, S.
Garcia, B.
Garcia Gamez, D.
Garcia-Pinto, D.
Garrido, X.
Gelmini, G.
Gemmeke, H.
Ghia, P. L.
Giaccari, U.
Giller, M.
Glass, H.
Goggin, L. M.
Gold, M. S.
Golup, G.
Gomez Albarracin, F.
Gomez Berisso, M.
Goncalves, P.
do Amaral, M. Goncalves
Gonzalez, D.
Gonzalez, J. G.
Gora, D.
Gorgi, A.
Gouffon, P.
Grebe, S.
Grigat, M.
Grillo, A. F.
Guardincerri, Y.
Guarino, F.
Guedes, G. P.
Gutierrez, J.
Hague, J. D.
Halenka, V.
Hansen, P.
Harari, D.
Harmsma, S.
Harton, J. L.
Haungs, A.
Healy, M. D.
Hebbeker, T.
Hebrero, G.
Heck, D.
Hojvat, C.
Holmes, V. C.
Homola, P.
Hoerandel, J. R.
Horneffer, A.
Hrabovsky, M.
Huege, T.
Hussain, M.
Iarlori, M.
Insolia, A.
Ionita, F.
Italiano, A.
Jiraskova, S.
Kaducak, M.
Kampert, K. H.
Karova, T.
Kasper, P.
Kegl, B.
Keilhauer, B.
Kemp, E.
Kieckhafer, R. M.
Klages, H. O.
Kleifges, M.
Kleinfeller, J.
Knapik, R.
Knapp, J.
Koang, D. -H.
Krieger, A.
Kroemer, O.
Kruppke, D.
Kuempel, D.
Kunka, N.
Kusenko, A.
La Rosa, G.
Lachaud, C.
Lago, B. L.
Leao, M. S. A. B.
Lebrun, D.
Lebrun, P.
Lee, J.
Leigui de Oliveira, M. A.
Lemiere, A.
Letessier-Selvon, A.
Leuthold, M.
Lhenry-Yvon, I.
Lopez, R.
Lopez Agueera, A.
Lozano Bahilo, J.
Lucero, A.
Luna Garcia, R.
Maccarone, M. C.
Macolino, C.
Maldera, S.
Mandat, D.
Mantsch, P.
Mariazzi, A. G.
Maris, I. C.
Marquez Falcon, H. R.
Martello, D.
Martinez, J.
Martinez Bravo, O.
Mathes, H. J.
Matthews, J.
Matthews, J. A. J.
Matthiae, G.
Maurizio, D.
Mazur, P. O.
McEwen, M.
McNeil, R. R.
Medina-Tanco, G.
Melissas, M.
Melo, D.
Menichetti, E.
Menshikov, A.
Meyhandan, R.
Micheletti, M. I.
Miele, G.
Miller, W.
Miramonti, L.
Mollerach, S.
Monasor, M.
Ragaigne, D. Monnier
Montanet, F.
Morales, B.
Morello, C.
Moreno, J. C.
Morris, C.
Mostafa, M.
Mueller, S.
Muller, M. A.
Mussa, R.
Navarra, G.
Navarro, J. L.
Navas, S.
Necesal, P.
Nellen, L.
Newman-Holmes, C.
Newton, D.
Nhung, P. T.
Nierstenhoefer, N.
Nitz, D.
Nosek, D.
Nozka, L.
Oehlschlaeger, J.
Olinto, A.
Olmos-Gilbaja, V. M.
Ortiz, M.
Ortolani, F.
Pacheco, N.
Selmi-Dei, D. Pakk
Palatka, M.
Pallotta, J.
Parente, G.
Parizot, E.
Parlati, S.
Pastor, S.
Patel, M.
Paul, T.
Pavlidou, V.
Payet, K.
Pech, M.
Pekala, J.
Pelayo, R.
Pepe, I. M.
Perrone, L.
Pesce, R.
Petermann, E.
Petrera, S.
Petrinca, P.
Petrolini, A.
Petrov, Y.
Petrovic, J.
Pfendner, C.
Pichel, A.
Piegaia, R.
Pierog, T.
Pimenta, M.
Pinto, T.
Pirronello, V.
Pisanti, O.
Platino, M.
Pochon, J.
Ponce, V. H.
Pontz, M.
Privitera, P.
Prouza, M.
Quel, E. J.
Rautenberg, J.
Ravignani, D.
Redondo, A.
Reucroft, S.
Revenu, B.
Rezende, F. A. S.
Ridky, J.
Riggi, S.
Risse, M.
Riviere, C.
Rizi, V.
Robledo, C.
Rodriguez, G.
Martino, J. Rodriguez
Rodriguez Rojo, J.
Rodriguez-Cabo, I.
Rodriguez-Frias, M. D.
Ros, G.
Rosado, J.
Roth, M.
Rouille-d'Orfeuil, B.
Roulet, E.
Rovero, A. C.
Salamida, F.
Salazar, H.
Salina, G.
Sanchez, F.
Santander, M.
Santo, C. E.
Santos, E. M.
Sarazin, F.
Sarkar, S.
Sato, R.
Scharf, N.
Scherini, V.
Schieler, H.
Schiffer, P.
Schmidt, A.
Schmidt, F.
Schmidt, T.
Scholten, O.
Schoorlemmer, H.
Schovancova, J.
Schovanek, P.
Schroeder, F.
Schulte, S.
Schuessler, F.
Schuster, D.
Sciutto, S. J.
Scuderi, M.
Segreto, A.
Semikoz, D.
Settimo, M.
Shellard, R. C.
Sidelnik, I.
Siffert, B. B.
Smetniansky De Grande, N.
Smialkowski, A.
Smida, R.
Smith, B. E.
Snow, G. R.
Sommers, P.
Sorokin, J.
Spinka, H.
Squartini, R.
Strazzeri, E.
Stutz, A.
Suarez, F.
Suomijaervi, T.
Supanitsky, A. D.
Sutherland, M. S.
Swain, J.
Szadkowski, Z.
Tamashiro, A.
Tamburro, A.
Tarutina, T.
Tascau, O.
Tcaciuc, R.
Tcherniakhovski, D.
Thao, N. T.
Thomas, D.
Ticona, R.
Tiffenberg, J.
Timmermans, C.
Tkaczyk, W.
Peixoto, C. J. Todero
Tome, B.
Tonachini, A.
Torres, I.
Travnicek, P.
Tridapalli, D. B.
Tristram, G.
Trovato, E.
Tuci, V.
Tueros, M.
Ulrich, R.
Unger, M.
Urban, M.
Valdes Galicia, J. F.
Valino, I.
Valore, L.
van den Berg, A. M.
van Elewyck, V.
Vazquez, R. A.
Veberic, D.
Velarde, A.
Venters, T.
Verzi, V.
Videla, M.
Villasenor, L.
Vorobiov, S.
Voyvodic, L.
Wahlberg, H.
Wahrlich, P.
Wainberg, O.
Warner, D.
Watson, A. A.
Westerhoff, S.
Whelan, B. J.
Wieczorek, G.
Wiencke, L.
Wilczynska, B.
Wilczynski, H.
Wileman, C.
Winnick, M. G.
Wu, H.
Wundheiler, B.
Younk, P.
Yuan, G.
Zas, E.
Zavrtanik, D.
Zavrtanik, M.
Zaw, I.
Zepeda, A.
Ziolkowski, M.
CA Pierre Auger Collaboration
TI Limit on the diffuse flux of ultrahigh energy tau neutrinos with the
surface detector of the Pierre Auger Observatory
SO PHYSICAL REVIEW D
LA English
DT Article
ID ACTIVE GALACTIC NUCLEI; COSMIC-RAYS; AIR-SHOWERS; PERFORMANCE;
ASTROPHYSICS; OSCILLATIONS; PROPAGATION; TELESCOPES; SPECTRUM; SEARCH
AB Data collected at the Pierre Auger Observatory are used to establish an upper limit on the diffuse flux of tau neutrinos in the cosmic radiation. Earth-skimming nu(tau) may interact in the Earth's crust and produce a tau lepton by means of charged-current interactions. The tau lepton may emerge from the Earth and decay in the atmosphere to produce a nearly horizontal shower with a typical signature, a persistent electromagnetic component even at very large atmospheric depths. The search procedure to select events induced by tau decays against the background of normal showers induced by cosmic rays is described. The method used to compute the exposure for a detector continuously growing with time is detailed. Systematic uncertainties in the exposure from the detector, the analysis, and the involved physics are discussed. No tau neutrino candidates have been found. For neutrinos in the energy range 2x10(17) eV < E-nu < 2x10(19) eV, assuming a diffuse spectrum of the form E-nu(-2), data collected between 1 January 2004 and 30 April 2008 yield a 90% confidence-level upper limit of E(nu)(2)dN(nu tau)/dE(nu)< 9x10(-8) GeV cm(-2) s(-1) sr(-1).
C1 [Allekotte, I.; Asorey, H.; Bertou, X.; Golup, G.; Gomez Berisso, M.; Harari, D.; Mollerach, S.; Pochon, J.; Ponce, V. H.; Roulet, E.] CNEA UNCuyo CONICET, Ctr Atom Bariloche, San Carlos De Bariloche, Rio Negro, Argentina.
[Colombo, E.; Etchegoyen, A.; Ferrero, A.; Filevich, A.; Gamarra, R. F.; Krieger, A.; Micheletti, M. I.; Platino, M.; Ravignani, D.; Sidelnik, I.; Smetniansky De Grande, N.; Suarez, F.; Wainberg, O.; Wundheiler, B.] Comis Nacl Energia Atom CONICET UTN FRBA, Ctr Atom Constituyentes, Buenos Aires, DF, Argentina.
[Guardincerri, Y.; Piegaia, R.; Tiffenberg, J.] Univ Buenos Aires, FCEyN, Dept Fis, RA-1053 Buenos Aires, DF, Argentina.
[Badagnani, D.; Dova, M. T.; Gomez Albarracin, F.; Hansen, P.; Mariazzi, A. G.; Moreno, J. C.; Sciutto, S. J.; Tarutina, T.; Tueros, M.; Wahlberg, H.] Univ Nacl La Plata, IFLP, La Plata, Buenos Aires, Argentina.
[Pichel, A.; Rovero, A. C.; Tamashiro, A.] Consejo Nacl Invest Cient & Tecn, Inst Astron & Fis Espacio, RA-1033 Buenos Aires, DF, Argentina.
[Abraham, J.; De La Vega, G.; Garcia, B.; Videla, M.] UTN FRM CONICET CNEA, Observ Meteorol Parque Gral San Martin, Mendoza, Argentina.
[Contreras, F.; Rodriguez Rojo, J.; Santander, M.; Sato, R.; Squartini, R.] Pierre Auger So Observ, Malargue, Argentina.
[Avila, G.] Pierre Auger So Observ & Comis Nacl Energia Atom, Malargue, Argentina.
[Barber, K. B.; Bellido, J. A.; Clay, R. W.; Dawson, B. R.; Holmes, V. C.; Sorokin, J.; Wahrlich, P.; Whelan, B. J.; Winnick, M. G.] Univ Adelaide, Adelaide, SA, Australia.
[Aguirre, C.] Univ Catolica Bolivia, La Paz, Bolivia.
[Barbosa, A. F.; Bonifazi, C.; dos Anjos, J. C.; Rezende, F. A. S.; Shellard, R. C.] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil.
[Fracchiolla, C. E.; Shellard, R. C.] Pontificia Univ Catolica Rio de Janeiro, Rio De Janeiro, Brazil.
[Carvalho, W.; de Souza, V.; Gouffon, P.; Tridapalli, D. B.] Univ Sao Paulo, Inst Fis, BR-01498 Sao Paulo, Brazil.
[Chinellato, J. A.; de Almeida, R. M.; de Mello, W. J. M., Jr.; Dobrigkeit, C.; Escobar, C. O.; Fauth, A. C.; Kemp, E.; Muller, M. A.; Selmi-Dei, D. Pakk; Peixoto, C. J. Todero] Univ Estadual Campinas, IFGW, Campinas, SP, Brazil.
[Guedes, G. P.] Univ Estadual Feira de Santana, Santana, Brazil.
[Barroso, S. L. C.] Univ Estadual Sudoeste Bahia, Vitoria Da Conquista, BA, Brazil.
[Pepe, I. M.] Univ Fed Bahia, Salvador, BA, Brazil.
[Leao, M. S. A. B.; Leigui de Oliveira, M. A.] Univ Fed ABC, Santo Andre, SP, Brazil.
[de Mello Neto, J. R. T.; Lago, B. L.; Santos, E. M.; Siffert, B. B.] Univ Fed Rio de Janeiro, Inst Fis, Rio De Janeiro, Brazil.
[do Amaral, M. Goncalves] Univ Fed Fluminense, Inst Fis, BR-24020 Niteroi, RJ, Brazil.
[Nosek, D.] Charles Univ Prague, Fac Math & Phys, Inst Particle & Nucl Phys, Prague, Czech Republic.
[Bohacova, M.; Chudoba, J.; Hrabovsky, M.; Karova, T.; Mandat, D.; Necesal, P.; Nozka, L.; Palatka, M.; Pech, M.; Prouza, M.; Ridky, J.; Schovancova, J.; Schovanek, P.; Smida, R.; Travnicek, P.] Acad Sci Czech Republic, Inst Phys, Prague, Czech Republic.
[Halenka, V.; Hrabovsky, M.] Palacky Univ, CR-77147 Olomouc, Czech Republic.
[Deligny, O.; Dornic, D.; Ghia, P. L.; Lemiere, A.; Lhenry-Yvon, I.; Suomijaervi, T.; van Elewyck, V.] Univ Paris 11, CNRS, IN2P3, Inst Phys Nucl Orsay IPNO, F-91405 Orsay, France.
[Allard, D.; Beau, T.; Busca, N. G.; Decerprit, G.; Lachaud, C.; Parizot, E.; Rouille-d'Orfeuil, B.; Semikoz, D.; Tristram, G.] Univ Paris 07, CNRS, IN2P3, Lab AstroParticule & Cosmol APC, Paris, France.
[Cordier, A.; Dagoret-Campagne, S.; Garrido, X.; Kegl, B.; Ragaigne, D. Monnier; Strazzeri, E.; Urban, M.; Wu, H.] Univ Paris 11, CNRS, IN2P3, Accelerateur Lineaire Lab, F-91405 Orsay, France.
[Aublin, J.; Billoir, P.; Blanch-Bigas, O.; Bonifazi, C.; Letessier-Selvon, A.] Univ Paris 06, Lab Phys Nucl & Hautes Energies LPNHE, Paris 05, France.
[Belletoile, A.; Berat, C.; Chauvin, J.; Koang, D. -H.; Lebrun, D.; Montanet, F.; Payet, K.; Riviere, C.; Stutz, A.] Univ Grenoble 1, CNRS, IN2P3, LPSC,INPG, Grenoble, France.
[Revenu, B.] SUBATECH, Nantes, France.
[Becker, K. H.; Kampert, K. H.; Kruppke, D.; Kuempel, D.; Nierstenhoefer, N.; Rautenberg, J.; Risse, M.; Scherini, V.; Tascau, O.] Berg Univ Wuppertal, Wuppertal, Germany.
[Bluemer, H.; Daumiller, K.; Engel, R.; Garrido, X.; Haungs, A.; Heck, D.; Huege, T.; Keilhauer, B.; Klages, H. O.; Kleinfeller, J.; Mathes, H. J.; Mueller, S.; Oehlschlaeger, J.; Pierog, T.; Roth, M.; Schieler, H.; Schroeder, F.; Schuessler, F.; Ulrich, R.; Unger, M.] Forschungszentrum Karlsruhe, Inst Kernphys, D-76021 Karlsruhe, Germany.
[Asch, T.; Gemmeke, H.; Kleifges, M.; Kroemer, O.; Kunka, N.; Menshikov, A.; Schmidt, A.; Tcherniakhovski, D.] Forschungszentrum Karlsruhe, Inst Prozessdatenverarbeitung & Elekt, Karlsruhe, Germany.
[Biermann, P. L.; Caramete, L.; Curutiu, A.; Dutan, I.] Max Planck Inst Radioastron, D-5300 Bonn, Germany.
[Dembinski, H.; Erdmann, M.; Fliescher, S.; Grigat, M.; Hebbeker, T.; Leuthold, M.; Scharf, N.; Schiffer, P.; Schulte, S.] Univ Aachen, Rhein Westfal TH Aachen, Phys Inst A 3, D-5100 Aachen, Germany.
[Bluemer, H.; Caballero-Mora, K. S.; Gonzalez, D.; Gora, D.; Maris, I. C.; Melissas, M.; Schmidt, T.; Tamburro, A.] Univ Karlsruhe TH, Inst Expt Kernphys, Karlsruhe, Germany.
[Baecker, T.; Buchholz, P.; Fleck, I.; Grebe, S.; Pontz, M.; Tcaciuc, R.; Ziolkowski, M.] Univ Siegen, Siegen, Germany.
[Gambetta, S.; Pesce, R.; Petrolini, A.] Dipartimento Fis Univ, Genoa, Italy.
[Iarlori, M.; Macolino, C.; Petrera, S.; Rizi, V.; Salamida, F.] Univ Aquila, I-67100 Laquila, Italy.
[De Donato, C.; Miramonti, L.] Univ Milan, Milan, Italy.
[Bernardini, P.; Bleve, C.; De Mitri, I.; Giaccari, U.; Martello, D.; Perrone, L.; Settimo, M.] Univ Salento, Dipartimento Fis, Lecce, Italy.
[Ambrosio, M.; Aramo, C.; Della Selva, A.; D'Urso, D.; Guarino, F.; Miele, G.; Pisanti, O.; Valore, L.] Univ Naples Federico II, Naples, Italy.
[Delle Fratte, C.; Di Giulio, C.; Matthiae, G.; Ortolani, F.; Petrinca, P.; Rodriguez, G.; Salina, G.; Tuci, V.; Verzi, V.] Univ Roma Tor Vergata, I-00173 Rome, Italy.
[Caruso, R.; De Domenico, M.; Insolia, A.; Italiano, A.; Pirronello, V.; Riggi, S.; Martino, J. Rodriguez; Scuderi, M.; Trovato, E.] Univ Catania, Catania, Italy.
[Caruso, R.; De Domenico, M.; Insolia, A.; Italiano, A.; Pirronello, V.; Riggi, S.; Martino, J. Rodriguez; Scuderi, M.; Trovato, E.] Sezione Ist Nazl Fis Nucl, Catania, Italy.
[Anzalone, A.; Catalano, O.; La Rosa, G.; Maccarone, M. C.; Segreto, A.] Ist Astrofis Spaziale & Fis Cosm Palermo INAF, Palermo, Italy.
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[Arneodo, F.; Grillo, A. F.; Parlati, S.] INFN, Lab Nazl Gran Sasso, Laquila, Italy.
[Lopez, R.; Martinez Bravo, O.; Robledo, C.; Salazar, H.; Torres, I.] Benemerita Univ Autonoma Puebla, Puebla, Mexico.
[Luna Garcia, R.; Martinez, J.] IPN, Ctr Invest Computo, Mexico City 07738, DF, Mexico.
[Zepeda, A.] CINVESTAV, IPN, Ctr Invest & Estudios Avanzados, Mexico City 14000, DF, Mexico.
[Zepeda, A.] Inst Nacl Astrofis Opt & Electr, Puebla, Mexico.
[Pelayo, R.] IPN, Unidad Profes Interdisciplinaria Ingn & Tecnol Av, Mexico City 07738, DF, Mexico.
[Cotti, U.; Marquez Falcon, H. R.; Villasenor, L.] Univ Michoacana, Morelia, Michoacan, Mexico.
[D'Olivo, J. C.; Medina-Tanco, G.; Morales, B.; Nellen, L.; Sanchez, F.; Supanitsky, A. D.; Valdes Galicia, J. F.] Univ Nacl Autonoma Mexico, Mexico City 04510, DF, Mexico.
[Coppens, J.; de Jong, S. J.; Falcke, H.; Grebe, S.; Hoerandel, J. R.; Horneffer, A.; Jiraskova, S.; Schoorlemmer, H.; Timmermans, C.] Radboud Univ Nijmegen, IMAPP, Nijmegen, Netherlands.
[Fraenkel, E. D.; Harmsma, S.; Meyhandan, R.; Scholten, O.; van den Berg, A. M.] Univ Groningen, Kernfys Versneller Inst, Groningen, Netherlands.
[Coppens, J.; Harmsma, S.; Petrovic, J.; Schoorlemmer, H.; Timmermans, C.] NIKHEF, Amsterdam, Netherlands.
[Falcke, H.] ASTRON, Dwingeloo, Netherlands.
[Gora, D.; Homola, P.; Pekala, J.; Wilczynska, B.; Wilczynski, H.] Inst Nucl Phys PAN, Krakow, Poland.
[Giller, M.; Smialkowski, A.; Szadkowski, Z.; Tkaczyk, W.; Wieczorek, G.] Univ Lodz, PL-90131 Lodz, Poland.
[Abreu, P.; Andringa, S.; Assis, P.; Brogueira, P.; Conceicao, R.; Goncalves, P.; Pimenta, M.; Santo, C. E.; Tome, B.] Inst Super Tecn, Lisbon, Portugal.
[Filipcic, A.; Veberic, D.; Zavrtanik, D.; Zavrtanik, M.] Jozef Stefan Inst, Ljubljana, Slovenia.
[Creusot, A.; Filipcic, A.; Hussain, M.; Veberic, D.; Vorobiov, S.; Zavrtanik, D.; Zavrtanik, M.] Univ Nova Gorica, Lab Astroparticle Phys, Nova Gorica, Slovenia.
[Pastor, S.; Pinto, T.] Univ Valencia, CSIC, Inst Fis Corpuscular, Valencia, Spain.
[Arqueros, F.; Blanco, F.; Garcia-Pinto, D.; Monasor, M.; Ortiz, M.; Ros, G.; Rosado, J.] Univ Complutense Madrid, Madrid, Spain.
[del Peral, L.; Gutierrez, J.; Hebrero, G.; McEwen, M.; Pacheco, N.; Redondo, A.; Rodriguez-Frias, M. D.; Ros, G.] Univ Alcala De Henares, Madrid, Spain.
[Bueno, A.; Garcia Gamez, D.; Gonzalez, J. G.; Lozano Bahilo, J.; Navarro, J. L.; Navas, S.] Univ Granada, Granada, Spain.
[Alvarez-Muniz, J.; San Luis, P. Facal; Lopez Agueera, A.; Olmos-Gilbaja, V. M.; Parente, G.; Rodriguez-Cabo, I.; Valino, I.; Vazquez, R. A.; Zas, E.] Univ Santiago de Compostela, Santiago De Compostela, Spain.
[Spinka, H.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Burton, R. E.; Covault, C. E.; Ferrer, F.] Case Western Reserve Univ, Cleveland, OH 44106 USA.
[Sarazin, F.; Schuster, D.; Wiencke, L.] Colorado Sch Mines, Golden, CO 80401 USA.
[Bauleo, P.; Brack, J.; Harton, J. L.; Knapik, R.; Mostafa, M.; Petrov, Y.; Thomas, D.; Warner, D.; Younk, P.] Colorado State Univ, Ft Collins, CO 80523 USA.
[Brown, W. C.] Colorado State Univ, Pueblo, CO USA.
[Ahn, E. J.; Chou, A.; Fazzini, N.; Glass, H.; Hojvat, C.; Kaducak, M.; Kasper, P.; Lebrun, P.; Mantsch, P.; Mazur, P. O.; Newman-Holmes, C.; Spinka, H.; Voyvodic, L.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Dorofeev, A.; Gonzalez, J. G.; Matthews, J.; McNeil, R. R.; Yuan, G.] Louisiana State Univ, Baton Rouge, LA 70803 USA.
[Chye, J.; Diaz, J. C.; Fick, B.; Kieckhafer, R. M.; Nitz, D.] Michigan Technol Univ, Houghton, MI 49931 USA.
[Allen, J.; Chou, A.; Farrar, G.; Zaw, I.] NYU, New York, NY USA.
[Paul, T.; Reucroft, S.; Swain, J.] Northeastern Univ, Boston, MA 02115 USA.
[Allison, P.; Baughman, B.; Beatty, J. J.; Morris, C.; Sutherland, M. S.] Ohio State Univ, Columbus, OH 43210 USA.
[Bellido, J. A.; Coutu, S.; Criss, A.; Sommers, P.] Penn State Univ, University Pk, PA 16802 USA.
[Matthews, J.] Southern Univ, Baton Rouge, LA USA.
[Arisaka, K.; Gelmini, G.; Healy, M. D.; Kusenko, A.; Lee, J.] Univ Calif Los Angeles, Los Angeles, CA USA.
[Ave, M.; Bohacova, M.; Cazon, L.; Cronin, J.; San Luis, P. Facal; Ionita, F.; Olinto, A.; Pavlidou, V.; Privitera, P.; Schmidt, F.; Venters, T.; Wundheiler, B.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
[DuVernois, M. A.] Univ Hawaii, Honolulu, HI USA.
[Petermann, E.; Snow, G. R.] Univ Nebraska, Lincoln, NE USA.
[Becker, B. R.; Gold, M. S.; Hague, J. D.; Matthews, J. A. J.; Miller, W.] Univ New Mexico, Albuquerque, NM USA.
[Connolly, B.] Univ Penn, Philadelphia, PA 19104 USA.
[BenZvi, S.; Pfendner, C.; Westerhoff, S.] Univ Wisconsin, Madison, WI USA.
[Anchordoqui, L.; Goggin, L. M.] Univ Wisconsin, Milwaukee, WI 53201 USA.
[Diep, P. N.; Dong, P. N.; Nhung, P. T.; Thao, N. T.] Inst Nucl Sci & Technol INST, Hanoi, Vietnam.
[Bruijn, R.; Knapp, J.; Newton, D.; Patel, M.; Smith, B. E.; Watson, A. A.; Wileman, C.] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England.
[Sarkar, S.] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford, England.
[Bueno, A.; Garcia Gamez, D.; Gonzalez, J. G.; Lozano Bahilo, J.; Navarro, J. L.; Navas, S.] CAFPE, Granada, Spain.
[Abreu, P.; Andringa, S.; Assis, P.; Brogueira, P.; Conceicao, R.; Goncalves, P.; Pimenta, M.; Santo, C. E.; Tome, B.] LIP, P-1000 Lisbon, Portugal.
[Aglietta, M.; Argiro, S.; Bonino, R.; Castellina, A.; Cester, R.; Chiavassa, A.; Fulgione, W.; Ghia, P. L.; Gorgi, A.; Lucero, A.; Maldera, S.; Maurizio, D.; Melo, D.; Menichetti, E.; Morello, C.; Mussa, R.; Navarra, G.; Tonachini, A.] Sezione Ist Nazl Fis Nucl, Turin, Italy.
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[Ambrosio, M.; Aramo, C.; Della Selva, A.; D'Urso, D.; Guarino, F.; Miele, G.; Pisanti, O.; Valore, L.] Sezione Ist Nazl Fis Nucl, Naples, Italy.
[Bernardini, P.; Bleve, C.; De Mitri, I.; Giaccari, U.; Martello, D.; Perrone, L.; Settimo, M.] Sezione Ist Nazl Fis Nucl, Lecce, Italy.
[De Donato, C.; Miramonti, L.] Sezione Ist Nazl Fis Nucl, Milan, Italy.
[Iarlori, M.; Macolino, C.; Petrera, S.; Rizi, V.; Salamida, F.] INFN, Laquila, Italy.
[Gambetta, S.; Pesce, R.; Petrolini, A.] Ist Nazl Fis Nucl, I-16146 Genoa, Italy.
[Aublin, J.; Billoir, P.; Blanch-Bigas, O.; Bonifazi, C.; Letessier-Selvon, A.] Univ Paris 07, Lab Phys & Hautes Energies LPNHE, Paris 05, France.
[Badagnani, D.; Dova, M. T.; Gomez Albarracin, F.; Hansen, P.; Mariazzi, A. G.; Moreno, J. C.; Pichel, A.; Sciutto, S. J.; Tarutina, T.; Tueros, M.; Wahlberg, H.] Consejo Nacl Invest Cient & Tecn, La Plata, Buenos Aires, Argentina.
[Allekotte, I.; Asorey, H.; Bertou, X.; Golup, G.; Gomez Berisso, M.; Harari, D.; Mollerach, S.; Pochon, J.; Ponce, V. H.; Roulet, E.] CNEA UNCuyo CONICET, Inst Balseiro, San Carlos De Bariloche, Rio Negro, Argentina.
RP Abraham, J (reprint author), CNEA UNCuyo CONICET, Ctr Atom Bariloche, San Carlos De Bariloche, Rio Negro, Argentina.
RI Arneodo, Francesco/E-5061-2015; Bueno, Antonio/F-3875-2015; Parente,
Gonzalo/G-8264-2015; Alvarez-Muniz, Jaime/H-1857-2015; Rosado,
Jaime/K-9109-2014; Valino, Ines/J-8324-2012; Carvalho Jr.,
Washington/H-9855-2015; Navas, Sergio/N-4649-2014; De Donato,
Cinzia/J-9132-2015; Martello, Daniele/J-3131-2012; Insolia,
Antonio/M-3447-2015; Ros, German/L-4764-2014; Ridky, Jan/H-6184-2014;
Chudoba, Jiri/G-7737-2014; Pech, Miroslav/G-5760-2014; Todero Peixoto,
Carlos Jose/G-3873-2012; Garcia Pinto, Diego/J-6724-2014; Pastor,
Sergio/J-6902-2014; Tome, Bernardo/J-4410-2013; Espirito Santo, Maria
Catarina/L-2341-2014; Pimenta, Mario/M-1741-2013; Di Giulio,
Claudio/B-3319-2015; Pavlidou, Vasiliki/C-2944-2011; Anjos,
Joao/C-8335-2013; Schussler, Fabian/G-5313-2013; Nierstenhofer,
Nils/H-3699-2013; Goncalves, Patricia /D-8229-2013; Prouza,
Michael/F-8514-2014; Mandat, Dusan/G-5580-2014; Bohacova,
Martina/G-5898-2014; Nozka, Libor/G-5550-2014; Cazon,
Lorenzo/G-6921-2014; Schovanek, Petr/G-7117-2014; Travnicek,
Petr/G-8814-2014; Smida, Radomir/G-6314-2014; de souza,
Vitor/D-1381-2012; Shellard, Ronald/G-4825-2012; Petrolini,
Alessandro/H-3782-2011; Miele, Gennaro/F-3628-2010; Muller, Marcio
Aparecido/H-9112-2012; fulgione, walter/I-5232-2012; D'Urso,
Domenico/I-5325-2012; Bleve, Carla/J-2521-2012; Brogueira,
Pedro/K-3868-2012; Chinellato, Jose Augusto/I-7972-2012; Tamburro,
Alessio/A-5703-2013; Falcke, Heino/H-5262-2012; Arneodo,
Francesco/B-8076-2013; De Domenico, Manlio/D-1966-2009; Kemp,
Ernesto/H-1502-2011; Chiavassa, Andrea/A-7597-2012; Verzi,
Valerio/B-1149-2012; Chinellato, Carola Dobrigkeit /F-2540-2011; Dias,
Sandra/F-8134-2010; Dutan, Ioana/C-2337-2011; Caramete,
Laurentiu/C-2328-2011; Venters, Tonia/D-2936-2012; Fauth,
Anderson/F-9570-2012; Aramo, Carla/D-4317-2011; Pesce,
Roberto/G-5791-2011; Assis, Pedro/D-9062-2013; Arqueros,
Fernando/K-9460-2014; Conceicao, Ruben/L-2971-2014; Beatty,
James/D-9310-2011; Guarino, Fausto/I-3166-2012; Bonino,
Raffaella/S-2367-2016; Rodriguez Frias, Maria /A-7608-2015; Inst. of
Physics, Gleb Wataghin/A-9780-2017; De Mitri, Ivan/C-1728-2017;
Rodriguez Fernandez, Gonzalo/C-1432-2014; Nosek, Dalibor/F-1129-2017; de
Mello Neto, Joao/C-5822-2013; Fulgione, Walter/C-8255-2016; De Domenico,
Manlio/B-5826-2014; Lozano-Bahilo, Julio/F-4881-2016; ORTOLANI,
FABRIZIO/F-7271-2016; scuderi, mario/O-7019-2014; zas,
enrique/I-5556-2015; Sarkar, Subir/G-5978-2011; Moura Santos,
Edivaldo/K-5313-2016; Gouffon, Philippe/I-4549-2012; de Almeida,
Rogerio/L-4584-2016; Abreu, Pedro/L-2220-2014
OI Arneodo, Francesco/0000-0002-1061-0510; Bueno,
Antonio/0000-0002-7439-4247; Parente, Gonzalo/0000-0003-2847-0461;
Alvarez-Muniz, Jaime/0000-0002-2367-0803; Rosado,
Jaime/0000-0001-8208-9480; Valino, Ines/0000-0001-7823-0154; Carvalho
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De Donato, Cinzia/0000-0002-9725-1281; Martello,
Daniele/0000-0003-2046-3910; Insolia, Antonio/0000-0002-9040-1566; Ros,
German/0000-0001-6623-1483; Ridky, Jan/0000-0001-6697-1393; Todero
Peixoto, Carlos Jose/0000-0003-3669-8212; Garcia Pinto,
Diego/0000-0003-1348-6735; Tome, Bernardo/0000-0002-7564-8392; Espirito
Santo, Maria Catarina/0000-0003-1286-7288; Pimenta,
Mario/0000-0002-2590-0908; Di Giulio, Claudio/0000-0002-0597-4547;
Pavlidou, Vasiliki/0000-0002-0870-1368; Schussler,
Fabian/0000-0003-1500-6571; Goncalves, Patricia /0000-0003-2042-3759;
Prouza, Michael/0000-0002-3238-9597; Cazon, Lorenzo/0000-0001-6748-8395;
Shellard, Ronald/0000-0002-2983-1815; Petrolini,
Alessandro/0000-0003-0222-7594; Miele, Gennaro/0000-0002-2028-0578;
D'Urso, Domenico/0000-0002-8215-4542; Brogueira,
Pedro/0000-0001-6069-4073; Chinellato, Jose Augusto/0000-0002-3240-6270;
Falcke, Heino/0000-0002-2526-6724; Arneodo,
Francesco/0000-0002-1061-0510; Chinellato, Carola Dobrigkeit
/0000-0002-1236-0789; Fauth, Anderson/0000-0001-7239-0288; Garcia,
Beatriz/0000-0003-0919-2734; Dembinski, Hans/0000-0003-3337-3850; Del
Peral, Luis/0000-0003-2580-5668; Coutu, Stephane/0000-0003-2923-2246;
Rizi, Vincenzo/0000-0002-5277-6527; Horandel, Jorg/0000-0001-6604-547X;
Mussa, Roberto/0000-0002-0294-9071; Ulrich, Ralf/0000-0002-2535-402X;
Segreto, Alberto/0000-0001-7341-6603; Knapp,
Johannes/0000-0003-1519-1383; Petrera, Sergio/0000-0002-6029-1255;
Bonino, Raffaella/0000-0002-4264-1215; Andringa,
Sofia/0000-0002-6397-9207; Mantsch, Paul/0000-0002-8382-7745; Anzalone,
Anna/0000-0003-1849-198X; Maccarone, Maria Concetta/0000-0001-8722-0361;
Kothandan, Divay/0000-0001-9048-7518; Castellina,
Antonella/0000-0002-0045-2467; Yuan, Guofeng/0000-0002-1907-8815; de
Jong, Sijbrand/0000-0002-3120-3367; La Rosa,
Giovanni/0000-0002-3931-2269; Salamida, Francesco/0000-0002-9306-8447;
Catalano, Osvaldo/0000-0002-9554-4128; Navarro Quirante, Jose
Luis/0000-0002-9915-1735; Aglietta, Marco/0000-0001-8354-5388; Asorey,
Hernan/0000-0002-4559-8785; Gomez Berisso, Mariano/0000-0001-5530-0180;
Aramo, Carla/0000-0002-8412-3846; maldera, simone/0000-0002-0698-4421;
Ravignani, Diego/0000-0001-7410-8522; Matthews,
James/0000-0002-1832-4420; Assis, Pedro/0000-0001-7765-3606; Arqueros,
Fernando/0000-0002-4930-9282; Conceicao, Ruben/0000-0003-4945-5340;
Beatty, James/0000-0003-0481-4952; Guarino, Fausto/0000-0003-1427-9885;
Rodriguez Frias, Maria /0000-0002-2550-4462; De Mitri,
Ivan/0000-0002-8665-1730; Rodriguez Fernandez,
Gonzalo/0000-0002-4683-230X; Nosek, Dalibor/0000-0001-6219-200X; de
Mello Neto, Joao/0000-0002-3234-6634; Fulgione,
Walter/0000-0002-2388-3809; De Domenico, Manlio/0000-0001-5158-8594;
Lozano-Bahilo, Julio/0000-0003-0613-140X; ORTOLANI,
FABRIZIO/0000-0003-4527-1843; scuderi, mario/0000-0001-9026-5317; zas,
enrique/0000-0002-4430-8117; Sarkar, Subir/0000-0002-3542-858X; Moura
Santos, Edivaldo/0000-0002-2818-8813; Gouffon,
Philippe/0000-0001-7511-4115; de Almeida, Rogerio/0000-0003-3104-2724;
Abreu, Pedro/0000-0002-9973-7314
NR 79
TC 81
Z9 81
U1 0
U2 33
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 10
AR 102001
DI 10.1103/PhysRevD.79.102001
PG 15
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WP
UT WOS:000266501900007
ER
PT J
AU Alekseev, IG
Bravar, A
Bunce, G
Dhawan, S
Eyser, KO
Gill, R
Haeberli, W
Huang, H
Jinnouchi, O
Kponou, A
Makdisi, Y
Nakagawa, I
Nass, A
Okada, H
Saito, N
Stephenson, EJ
Svirida, DN
Wise, T
Wood, J
Zelenski, A
AF Alekseev, I. G.
Bravar, A.
Bunce, G.
Dhawan, S.
Eyser, K. O.
Gill, R.
Haeberli, W.
Huang, H.
Jinnouchi, O.
Kponou, A.
Makdisi, Y.
Nakagawa, I.
Nass, A.
Okada, H.
Saito, N.
Stephenson, E. J.
Svirida, D. N.
Wise, T.
Wood, J.
Zelenski, A.
TI Measurements of single and double spin asymmetry in pp elastic
scattering in the CNI region with a polarized atomic hydrogen gas jet
target
SO PHYSICAL REVIEW D
LA English
DT Article
ID INTERSECTING STORAGE-RINGS; PROTON-PROTON SCATTERING; DELTA-SIGMA-T;
TOTAL CROSS-SECTION; SMALL-ANGLE PPBAR; HIGH-ENERGIES; IMPACT-PICTURE;
HADRONIC INTERFERENCE; SLOPE PARAMETER; ROOT-S=200 GEV
AB Precise measurements of the single spin asymmetry AN, and the double spin asymmetry ANN, in proton-proton (pp) elastic scattering in the region of four-momentum transfer squared 0.001 < -t < 0.032 (GeV/c)(2) have been performed using a polarized atomic hydrogen gas jet target and the Relativistic Heavy Ion Collider (RHIC) polarized proton beam. We present measurements of A(N) and A(NN) at center-of-mass energies root s = 6.8 and 13.7 GeV. These spin-dependent observables are sensitive to the poorly known hadronic spin-dependent amplitudes. Comparing A(N) at different energies, a root s dependence of the hadronic single spin-flip amplitude is suggested. A hadronic double spin-flip amplitude from the A(NN) data is consistent with zero within a 2-sigma level. We also present Delta(sigma T), estimated from the measured A(NN) data. The results for Delta(sigma T) are consistent with zero. Our results provide significant constraints toward a comprehensive understanding of the reaction mechanism for pp elastic scattering.
C1 [Bunce, G.; Jinnouchi, O.] RIKEN, BNL Res Ctr, Upton, NY 11973 USA.
[Stephenson, E. J.] Indiana Univ Cyclotron Facil, Bloomington, IN 47408 USA.
[Alekseev, I. G.; Svirida, D. N.] ITEP, Moscow 117259, Russia.
[Nakagawa, I.; Okada, H.; Saito, N.] RIKEN, Wako, Saitama 3510198, Japan.
SUNY Stony Brook, Stony Brook, NY 11794 USA.
[Haeberli, W.; Wise, T.] Univ Wisconsin, Madison, WI 53706 USA.
[Dhawan, S.] Yale Univ, New Haven, CT 06520 USA.
[Eyser, K. O.] Univ Calif Riverside, Riverside, CA 92521 USA.
[Okada, H.; Saito, N.] Kyoto Univ, Sakyo Ku, Kyoto 6068502, Japan.
[Bravar, A.; Bunce, G.; Gill, R.; Huang, H.; Kponou, A.; Makdisi, Y.; Nass, A.; Wood, J.; Zelenski, A.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Okada, H (reprint author), KEK, Tsukuba, Ibaraki 3050831, Japan.
EM hiromi@post.kek.jp
RI Alekseev, Igor/J-8070-2014; Svirida, Dmitry/R-4909-2016
OI Alekseev, Igor/0000-0003-3358-9635;
FU U.S. DOE [DE-AC02-98CH10886, W-31-109-ENG-38, DE-FG0288ER40438]; NSF
[PHY-0100348]; RIKEN, Japan
FX We would like to thank the Instrumentation Division and Collider
Accelerator Department at BNL for their work on the silicon detectors,
electronics, and the RHIC polarized proton beam. We also would like to
thank T. L. Trueman for useful discussions. This work is performed under
the auspices of U.S. DOE Contract No. DE-AC02-98CH10886 and No.
W-31-109-ENG-38, DOE Grant No. DE-FG0288ER40438, NSF Grant No.
PHY-0100348, and with support from RIKEN, Japan.
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 094014
DI 10.1103/PhysRevD.79.094014
PG 18
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800033
ER
PT J
AU Artamonov, AV
Bassalleck, B
Bhuyan, B
Blackmore, EW
Bryman, DA
Chen, S
Chiang, IH
Christidi, IA
Cooper, PS
Diwan, MV
Frank, JS
Fujiwara, T
Hu, J
Ives, J
Jaffe, DE
Kabe, S
Kettell, SH
Khabibullin, MM
Khotjantsev, AN
Kitching, P
Kobayashi, M
Komatsubara, TK
Konaka, A
Kozhevnikov, AP
Kudenko, YG
Kushnirenko, A
Landsberg, LG
Lewis, B
Li, KK
Littenberg, LS
Macdonald, JA
Mildenberger, J
Mineev, OV
Miyajima, M
Mizouchi, K
Mukhin, VA
Muramatsu, N
Nakano, T
Nomachi, M
Nomura, T
Numao, T
Obraztsov, VF
Omata, K
Patalakha, DI
Petrenko, SV
Poutissou, R
Ramberg, EJ
Redlinger, G
Sato, T
Sekiguchi, T
Shinkawa, T
Strand, RC
Sugimoto, S
Tamagawa, Y
Tschirhart, R
Tsunemi, T
Vavilov, DV
Viren, B
Wang, Z
Yershov, NV
Yoshimura, Y
Yoshioka, T
AF Artamonov, A. V.
Bassalleck, B.
Bhuyan, B.
Blackmore, E. W.
Bryman, D. A.
Chen, S.
Chiang, I. -H.
Christidi, I. -A.
Cooper, P. S.
Diwan, M. V.
Frank, J. S.
Fujiwara, T.
Hu, J.
Ives, J.
Jaffe, D. E.
Kabe, S.
Kettell, S. H.
Khabibullin, M. M.
Khotjantsev, A. N.
Kitching, P.
Kobayashi, M.
Komatsubara, T. K.
Konaka, A.
Kozhevnikov, A. P.
Kudenko, Yu. G.
Kushnirenko, A.
Landsberg, L. G.
Lewis, B.
Li, K. K.
Littenberg, L. S.
Macdonald, J. A.
Mildenberger, J.
Mineev, O. V.
Miyajima, M.
Mizouchi, K.
Mukhin, V. A.
Muramatsu, N.
Nakano, T.
Nomachi, M.
Nomura, T.
Numao, T.
Obraztsov, V. F.
Omata, K.
Patalakha, D. I.
Petrenko, S. V.
Poutissou, R.
Ramberg, E. J.
Redlinger, G.
Sato, T.
Sekiguchi, T.
Shinkawa, T.
Strand, R. C.
Sugimoto, S.
Tamagawa, Y.
Tschirhart, R.
Tsunemi, T.
Vavilov, D. V.
Viren, B.
Wang, Zhe
Yershov, N. V.
Yoshimura, Y.
Yoshioka, T.
CA E949 Collaboration
TI Study of the decay K+ -> pi(+) nu(nu)over-bar in the momentum region 140
< P-pi < 199 MeV/c
SO PHYSICAL REVIEW D
LA English
DT Article
ID ENDCAP PHOTON DETECTOR; GAUGE-THEORIES; 500 MHZ; RARE K; SEARCH; MODEL;
PHYSICS
AB Experiment E949 at Brookhaven National Laboratory has observed three new events consistent with the decay K+ -> pi(+) nu(nu) over bar in the pion momentum region 140 < P-pi < 199 MeV/c in an exposure of 1.71 x 10(12) stopped kaons with an estimated total background of 0.93 +/- 0.17(stat)(-0.24)(+0.32) (syst) events. This brings the total number of observed K+ -> pi(+)nu(nu) over bar events to seven. Combining this observation with previous results, assuming the pion spectrum predicted by the standard model, results in a branching ratio of B(K+ -> pi(+)nu(nu) over bar) = 1.73(+1.15)(-1.05) x 10(-10). An interpretation of the results for alternative models of the decay K+ -> pi(+) + nothing is also presented.
C1 [Artamonov, A. V.; Kozhevnikov, A. P.; Landsberg, L. G.; Mukhin, V. A.; Obraztsov, V. F.; Patalakha, D. I.; Petrenko, S. V.; Vavilov, D. V.] Inst High Energy Phys, Protvino 142280, Moscow Region, Russia.
[Bassalleck, B.; Lewis, B.] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA.
[Bhuyan, B.; Chiang, I. -H.; Diwan, M. V.; Frank, J. S.; Jaffe, D. E.; Kettell, S. H.; Li, K. K.; Littenberg, L. S.; Redlinger, G.; Strand, R. C.; Viren, B.; Wang, Zhe] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Blackmore, E. W.; Chen, S.; Hu, J.; Konaka, A.; Macdonald, J. A.; Mildenberger, J.; Numao, T.; Poutissou, R.] TRIUMF, Vancouver, BC V6T 2A3, Canada.
[Bryman, D. A.; Ives, J.] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada.
[Chen, S.; Wang, Zhe] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China.
[Christidi, I. -A.] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
[Cooper, P. S.; Kushnirenko, A.; Ramberg, E. J.; Tschirhart, R.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Fujiwara, T.; Mizouchi, K.; Nomura, T.] Kyoto Univ, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan.
[Kabe, S.; Kobayashi, M.; Komatsubara, T. K.; Omata, K.; Sato, T.; Sekiguchi, T.; Sugimoto, S.; Tsunemi, T.; Yoshimura, Y.; Yoshioka, T.] High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan.
[Khabibullin, M. M.; Khotjantsev, A. N.; Kudenko, Yu. G.; Mineev, O. V.; Yershov, N. V.] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia.
[Kitching, P.] Univ Alberta, Ctr Subatom Res, Edmonton, AB T6G 2N5, Canada.
[Miyajima, M.; Tamagawa, Y.] Univ Fukui, Dept Appl Phys, Fukui 9108507, Japan.
[Muramatsu, N.; Nakano, T.] Osaka Univ, Nucl Phys Res Ctr, Osaka 5670047, Japan.
[Nomachi, M.] Osaka Univ, Nucl Studies Lab, Osaka 5600043, Japan.
[Shinkawa, T.] Natl Def Acad, Dept Appl Phys, Kanagawa 2398686, Japan.
RP Artamonov, AV (reprint author), Inst High Energy Phys, Protvino 142280, Moscow Region, Russia.
RI Khabibullin, Marat/O-1076-2013
FU U.S. Department of Energy, the Ministry of Education, Culture, Sports,
Science and Technology of Japan; Natural Sciences and Engineering
Research Council; National Research Council of Canada; Russian
Federation State Scientific Center Institute for High Energy Physics;
Ministry of Science and Education of the Russian Federation; Chinese
Ministry of Education
FX We gratefully acknowledge the support and efforts of the BNL
Collider-Accelerator Department for the high quality K+ beam
delivered. We also recognize the substantial contributions made by the
participants of E787 without which this work would not have been
feasible, as well as the excellent technical and engineering support
provided by all collaborating institutions including P. Bichoneau, R.
Bula, M. Burke, M. Constable, H. Coombes, J. Cracco, A. Daviel, H. Diaz,
C. Donahue, E. Garber, C. Lim, A. Mango, G. Munoz, H. Ratzke, H. Sauter,
W. Smith, E. Stein, and A. Stillman, This research was supported in part
by the U.S. Department of Energy, the Ministry of Education, Culture,
Sports, Science and Technology of Japan through the Japan-U.S.
Cooperative Research Program in High Energy Physics and under
Grant-in-Aids for Scientific Research, the Natural Sciences and
Engineering Research Council and the National Research Council of
Canada, the Russian Federation State Scientific Center Institute for
High Energy Physics, and the Ministry of Science and Education of the
Russian Federation. S. Chen was also supported by the Program for New
Century Excellent Talents in University from the Chinese Ministry of
Education.
NR 61
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 092004
DI 10.1103/PhysRevD.79.092004
PG 27
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800008
ER
PT J
AU Arvanitaki, A
Dimopoulos, S
Dubovsky, S
Graham, PW
Harnik, R
Rajendran, S
AF Arvanitaki, Asimina
Dimopoulos, Savas
Dubovsky, Sergei
Graham, Peter W.
Harnik, Roni
Rajendran, Surjeet
TI Astrophysical probes of unification
SO PHYSICAL REVIEW D
LA English
DT Article
ID DARK-MATTER HALOS; CP INVARIANCE; GAMMA-RAYS; GALAXIES; SUPERSYMMETRY;
PARTICLES; LITHIUM; STARS
AB Traditional ideas for testing unification involve searching for the decay of the proton and its branching modes. We point out that several astrophysical experiments are now reaching sensitivities that allow them to explore supersymmetric unified theories. In these theories the electroweak-mass dark matter particle can decay, just like the proton, through dimension 6 operators with lifetime similar to 10(26) s. Interestingly, this time scale is now being investigated in several experiments including ATIC, PAMELA, HESS, and Fermi. Positive evidence for such decays may be opening our first direct window to physics at the supersymmetric unification scale of M(GUT)similar to 10(16) GeV, as well as the TeV scale. Moreover, in the same supersymmetric unified theories, dimension 5 operators can lead a weak-scale superparticle to decay with a lifetime of similar to 100 s. Such decays are recorded by a change in the primordial light element abundances and may well explain the present discord between the measured Li abundances and standard big bang nucleosynthesis, opening another window to unification. These theories make concrete predictions for the spectrum and signatures at the LHC as well as Fermi.
C1 [Arvanitaki, Asimina] Univ Calif Berkeley, Berkeley Ctr Theoret Phys, Berkeley, CA 94720 USA.
[Arvanitaki, Asimina] Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA.
[Dimopoulos, Savas; Dubovsky, Sergei; Graham, Peter W.; Harnik, Roni; Rajendran, Surjeet] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
[Dubovsky, Sergei] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia.
[Rajendran, Surjeet] Stanford Univ, SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA.
RP Arvanitaki, A (reprint author), Univ Calif Berkeley, Berkeley Ctr Theoret Phys, Berkeley, CA 94720 USA.
OI Graham, Peter/0000-0002-1600-1601
FU NSF [PHY-0503584]
FX We would like to thank Nima Arkani-Hamed, Douglas Finkbeiner, Raphael
Flauger, Stefan Funk, Lawrence Hall, David Jackson, Karsten Jedamzik,
Graham Kribs, John March-Russell, Igor Moskalenko, Peter Michelson,
Hitoshi Murayama, Michele Papucci, Stuart Raby, Graham Ross, Martin
Schmaltz, Philip Schuster, Natalia Toro, Jay Wacker, Robert Wagoner, and
Neal Weiner for valuable discussions. P. W. G. acknowledges the
hospitality of the Institute for Advanced Study and was partially
supported by NSF Grant No. PHY-0503584.
NR 78
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 10
AR 105022
DI 10.1103/PhysRevD.79.105022
PG 35
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WP
UT WOS:000266501900105
ER
PT J
AU Aubert, B
Bona, M
Karyotakis, Y
Lees, JP
Poireau, V
Prencipe, E
Prudent, X
Tisserand, V
Tico, JG
Grauges, E
Lopez, L
Palano, A
Pappagallo, M
Eigen, G
Stugu, B
Sun, L
Abrams, GS
Battaglia, M
Brown, DN
Jacobsen, RG
Kerth, LT
Kolomensky, YG
Lynch, G
Osipenkov, IL
Ronan, MT
Tackmann, K
Tanabe, T
Hawkes, CM
Soni, N
Watson, AT
Koch, H
Schroeder, T
Asgeirsson, DJ
Fulsom, BG
Hearty, C
Mattison, TS
McKenna, JA
Barrett, M
Khan, A
Blinov, VE
Bukin, AD
Buzykaev, AR
Druzhinin, VP
Golubev, VB
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Todyshev, KY
Bondioli, M
Curry, S
Eschrich, I
Kirkby, D
Lankford, AJ
Lund, P
Mandelkern, M
Martin, EC
Stoker, DP
Abachi, S
Buchanan, C
Atmacan, H
Gary, JW
Liu, F
Long, O
Vitug, GM
Yasin, Z
Zhang, L
Sharma, V
Campagnari, C
Hong, TM
Kovalskyi, D
Mazur, MA
Richman, JD
Beck, TW
Eisner, AM
Flacco, CJ
Heusch, CA
Kroseberg, J
Lockman, WS
Martinez, AJ
Schalk, T
Schumm, BA
Seiden, A
Wilson, MG
Winstrom, LO
Cheng, CH
Doll, DA
Echenard, B
Fang, F
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Andreassen, R
Mancinelli, G
Meadows, BT
Mishra, K
Sokoloff, MD
Bloom, PC
Ford, WT
Gaz, A
Hirschauer, JF
Nagel, M
Nauenberg, U
Smith, JG
Wagner, SR
Ayad, R
Soffer, A
Toki, WH
Wilson, RJ
Feltresi, E
Hauke, A
Jasper, H
Karbach, M
Merkel, J
Petzold, A
Spaan, B
Wacker, K
Kobel, MJ
Nogowski, R
Schubert, KR
Schwierz, R
Volk, A
Bernard, D
Bonneaud, GR
Latour, E
Verderi, M
Clark, PJ
Playfer, S
Watson, JE
Andreotti, M
Bettoni, D
Bozzi, C
Calabrese, R
Cecchi, A
Cibinetto, G
Franchini, P
Luppi, E
Negrini, M
Petrella, A
Piemontese, L
Santoro, V
Baldini-Ferroli, R
Calcaterra, A
de Sangro, R
Finocchiaro, G
Pacetti, S
Patteri, P
Peruzzi, IM
Piccolo, M
Rama, M
Zallo, A
Buzzo, A
Contri, R
Lo Vetere, M
Macri, MM
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Santroni, A
Tosi, S
Chaisanguanthum, KS
Morii, M
Adametz, A
Marks, J
Schenk, S
Uwer, U
Klose, V
Lacker, HM
Bard, DJ
Dauncey, PD
Tibbetts, M
Behera, PK
Chai, X
Charles, MJ
Mallik, U
Cochran, J
Crawley, HB
Dong, L
Meyer, WT
Prell, S
Rosenberg, EI
Rubin, AE
Gao, YY
Gritsan, AV
Guo, ZJ
Lae, CK
Arnaud, N
Bequilleux, J
D'Orazio, A
Davier, M
da Costa, JF
Grosdidier, G
Le Diberder, F
Lepeltier, V
Lutz, AM
Pruvot, S
Roudeau, P
Schune, MH
Serrano, J
Sordini, V
Stocchi, A
Wormser, G
Lange, DJ
Wright, DM
Bingham, I
Burke, JP
Chavez, CA
Fry, JR
Gabathuler, E
Gamet, R
Hutchcroft, DE
Payne, DJ
Touramanis, C
Bevan, AJ
Clarke, CK
Di Lodovico, F
Sacco, R
Sigamani, M
Cowan, G
Paramesvaran, S
Wren, AC
Brown, DN
Davis, CL
Denig, AG
Fritsch, M
Gradl, W
Alwyn, KE
Bailey, D
Barlow, RJ
Jackson, G
Lafferty, GD
West, TJ
Yi, JI
Anderson, J
Chen, C
Jawahery, A
Roberts, DA
Simi, G
Tuggle, JM
Dallapiccola, C
Li, X
Salvati, E
Saremi, S
Cowan, R
Dujmic, D
Fisher, PH
Henderson, SW
Sciolla, G
Spitznagel, M
Taylor, F
Yamamoto, RK
Zhao, M
Patel, PM
Robertson, SH
Lazzaro, A
Lombardo, V
Palombo, F
Bauer, JM
Cremaldi, L
Godang, R
Kroeger, R
Summers, DJ
Zhao, HW
Simard, M
Taras, P
Nicholson, H
De Nardo, G
Lista, L
Monorchio, D
Onorato, G
Sciacca, C
Raven, G
Snoek, HL
Jessop, CP
Knoepfel, KJ
LoSecco, JM
Wang, WF
Corwin, LA
Honscheid, K
Kagan, H
Kass, R
Morris, JP
Rahimi, AM
Regensburger, JJ
Sekula, SJ
Wong, QK
Blount, NL
Brau, J
Frey, R
Igonkina, O
Kolb, JA
Lu, M
Rahmat, R
Sinev, NB
Strom, D
Strube, J
Torrence, E
Castelli, G
Gagliardi, N
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Voci, C
Sanchez, PD
Ben-Haim, E
Briand, H
Calderini, G
Chauveau, J
Hamon, O
Leruste, P
Ocariz, J
Perez, A
Prendki, J
Sitt, S
Gladney, L
Biasini, M
Manoni, E
Angelini, C
Batignani, G
Bettarini, S
Carpinelli, M
Cervelli, A
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Morganti, M
Neri, N
Paoloni, E
Rizzo, G
Walsh, JJ
Pegna, DL
Lu, C
Olsen, J
Smith, AJS
Telnov, AV
Anulli, F
Baracchini, E
Cavoto, G
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Jackson, PD
Gioi, LL
Mazzoni, MA
Morganti, S
Piredda, G
Renga, F
Voena, C
Ebert, M
Hartmann, T
Schroder, H
Waldi, R
Adye, T
Franek, B
Olaiya, EO
Wilson, FF
Emery, S
Escalier, M
Esteve, L
de Monchenault, GH
Kozanecki, W
Vasseur, G
Yeche, C
Zito, M
Chen, XR
Liu, H
Park, W
Purohit, MV
White, RM
Wilson, JR
Allen, MT
Aston, D
Bartoldus, R
Benitez, JF
Cenci, R
Coleman, JP
Convery, MR
Dingfelder, JC
Dorfan, J
Dubois-Felsmann, GP
Dunwoodie, W
Field, RC
Gabareen, AM
Graham, MT
Grenier, P
Hast, C
Innes, WR
Kaminski, J
Kelsey, MH
Kim, H
Kim, P
Kocian, ML
Leith, DWGS
Li, S
Lindquist, B
Luitz, S
Luth, V
Lynch, HL
MacFarlane, DB
Marsiske, H
Messner, R
Muller, DR
Neal, H
Nelson, S
O'Grady, CP
Ofte, I
Perl, M
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Snyder, A
Su, D
Sullivan, MK
Suzuki, K
Swain, SK
Thompson, JM
Va'vra, J
Wagner, AP
Weaver, M
West, CA
Wisniewski, WJ
Wittgen, M
Wright, DH
Wulsin, HW
Yarritu, AK
Yi, K
Young, CC
Ziegler, V
Burchat, PR
Edwards, AJ
Miyashita, TS
Ahmed, S
Alam, MS
Ernst, JA
Pan, B
Saeed, MA
Zain, SB
Spanier, SM
Wogsland, BJ
Eckmann, R
Ritchie, JL
Ruland, AM
Schilling, CJ
Schwitters, RF
Drummond, BW
Izen, JM
Lou, XC
Bianchi, F
Gamba, D
Pelliccioni, M
Bomben, M
Bosisio, L
Cartaro, C
Della Ricca, G
Lanceri, L
Vitale, L
Azzolini, V
Lopez-March, N
Martinez-Vidal, F
Milanes, DA
Oyanguren, A
Albert, J
Banerjee, S
Bhuyan, B
Choi, HHF
Hamano, K
Kowalewski, R
Lewczuk, MJ
Nugent, IM
Roney, JM
Sobie, RJ
Gershon, TJ
Harrison, PF
Ilic, J
Latham, TE
Mohanty, GB
Band, HR
Chen, X
Dasu, S
Flood, KT
Pan, Y
Prepost, R
Vuosalo, CO
Wu, SL
AF Aubert, B.
Bona, M.
Karyotakis, Y.
Lees, J. P.
Poireau, V.
Prencipe, E.
Prudent, X.
Tisserand, V.
Tico, J. Garra
Grauges, E.
Lopez, L.
Palano, A.
Pappagallo, M.
Eigen, G.
Stugu, B.
Sun, L.
Abrams, G. S.
Battaglia, M.
Brown, D. N.
Jacobsen, R. G.
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CA BaBar Collaboration
TI Measurement of the semileptonic decays (B)over-bar -> D
tau(-)(nu)over-bar(tau) and (B)over-bar -> D*tau(-)(nu)over-bar(tau)
SO PHYSICAL REVIEW D
LA English
DT Article
ID B-MESON DECAYS; FORM-FACTORS; BRANCHING RATIO; PARTICLE PHYSICS; HEAVY
MESONS; MODEL
AB We present measurements of the semileptonic decays B- -> D-0 tau(-)(nu) over bar (tau), B- -> D*(0)tau(-)(nu) over bar tau, (B) over bar (0) -> D+tau(-)(nu) over bar (tau), and (B) over bar (0) -> D*(+)tau(-)(nu) over bar (tau), which are sensitive to non-standard model amplitudes in certain scenarios. The data sample consists of 232 x 10(6) Y(4S) -> B (B) over bar decays collected with the BABAR detector at the PEP-II e(+)e(-) squared to distinguish signalcollider. We select events with a D or D* meson and a light lepton (l = e or mu) recoiling against a fully reconstructed B meson. We perform a fit to the joint distribution of lepton momentum and missing mass (B) over bar -> D-(*())tau(-)(nu) over bar (tau) events from the backgrounds, predominantly R(D*) equivalent to B((B) over bar -> D*tau(-)(nu) over bar (tau))/B((B) over bar -> D*l(-)(nu) over bar (l)) and, from a combined fit to B- and (B) over bar (0) channels, obtain the results R(D) = (41.6 +/- 11.7 +/- 5.2)% and R(D*) = (29.7 +/- 5.6 +/- 1.8)%, where the uncertainties are statistical and systematic. Normalizing to measured B- -> D-(*()0)l(-)(nu) over bar (l) branching fractions, we obtain B((B) over bar -> D tau(-)(nu) over bar (tau)) = (0.86 +/- 0.24 +/- 0.06)% and B((B) over bar -> D*tau(-)(nu) over bar (tau)) = (1.62 +/- 0.31 +/- 0.10 +/- 0.05)%, where the additional third uncertainty is from the normalization mode. We also present, for the first time, distributions of the lepton momentum vertical bar P-l*vertical bar, and the squared momentum transfer, q(2).
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[Sanchez, P. del Amo; Ben-Haim, E.; Briand, H.; Calderini, G.; Chauveau, J.; Hamon, O.; Leruste, Ph.; Ocariz, J.; Perez, A.; Prendki, J.; Sitt, S.] Univ Paris 07, Univ Paris 06, CNRS, IN2P3,Lab Phys Nucl & Hautes Energies, F-75252 Paris, France.
[Gladney, L.] Univ Penn, Philadelphia, PA 19104 USA.
[Biasini, M.; Manoni, E.] Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy.
[Peruzzi, I. M.; Biasini, M.; Manoni, E.] Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
[Angelini, C.; Batignani, G.; Bettarini, S.; Carpinelli, M.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Lusiani, A.; Marchiori, G.; Morganti, M.; Neri, N.; Paoloni, E.; Rizzo, G.; Walsh, J. J.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
[Angelini, C.; Batignani, G.; Bettarini, S.; Carpinelli, M.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Marchiori, G.; Morganti, M.; Neri, N.; Paoloni, E.; Rizzo, G.] Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy.
[Lusiani, A.] Scuola Normale Super Pisa, I-56127 Pisa, Italy.
[Pegna, D. Lopes; Lu, C.; Olsen, J.; Smith, A. J. S.; Telnov, A. V.] Princeton Univ, Princeton, NJ 08544 USA.
[Anulli, F.; Baracchini, E.; Cavoto, G.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Jackson, P. D.; Gioi, L. Li; Mazzoni, M. A.; Morganti, S.; Piredda, G.; Renga, F.; Voena, C.] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy.
[Baracchini, E.; Faccini, R.; Ferroni, F.; Gaspero, M.; Renga, F.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
[Ebert, M.; Hartmann, T.; Schroeder, H.; Waldi, R.] Univ Rostock, D-18051 Rostock, Germany.
[Adye, T.; Franek, B.; Olaiya, E. O.; Wilson, F. F.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Emery, S.; Escalier, M.; Esteve, L.; de Monchenault, G. Hamel; Kozanecki, W.; Vasseur, G.; Yeche, Ch.; Zito, M.] CEA, SPP, Ctr Saclay, F-91191 Gif Sur Yvette, France.
[Chen, X. R.; Liu, H.; Park, W.; Purohit, M. V.; White, R. M.; Wilson, J. R.] Univ S Carolina, Columbia, SC 29208 USA.
[Allen, M. T.; Aston, D.; Bartoldus, R.; Benitez, J. F.; Cenci, R.; Coleman, J. P.; Convery, M. R.; Dingfelder, J. C.; Dorfan, J.; Dubois-Felsmann, G. P.; Dunwoodie, W.; Field, R. C.; Gabareen, A. M.; Graham, M. T.; Grenier, P.; Hast, C.; Innes, W. R.; Kaminski, J.; Kelsey, M. H.; Kim, H.; Kim, P.; Kocian, M. L.; Leith, D. W. G. S.; Li, S.; Lindquist, B.; Luitz, S.; Luth, V.; Lynch, H. L.; MacFarlane, D. B.; Marsiske, H.; Messner, R.; Muller, D. R.; Neal, H.; Nelson, S.; O'Grady, C. P.; Ofte, I.; Perl, M.; Ratcliff, B. N.; Roodman, A.; Salnikov, A. A.; Schindler, R. H.; Schwiening, J.; Snyder, A.; Su, D.; Sullivan, M. K.; Suzuki, K.; Swain, S. K.; Thompson, J. M.; Va'vra, J.; Wagner, A. P.; Weaver, M.; West, C. A.; Wisniewski, W. J.; Wittgen, M.; Wright, D. H.; Wulsin, H. W.; Yarritu, A. K.; Yi, K.; Young, C. C.; Ziegler, V.] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
[Burchat, P. R.; Edwards, A. J.; Miyashita, T. S.] Stanford Univ, Stanford, CA 94305 USA.
[Ahmed, S.; Alam, M. S.; Ernst, J. A.; Pan, B.; Saeed, M. A.; Zain, S. B.] SUNY Albany, Albany, NY 12222 USA.
[Spanier, S. M.; Wogsland, B. J.] Univ Tennessee, Knoxville, TN 37996 USA.
[Eckmann, R.; Ritchie, J. L.; Ruland, A. M.; Schilling, C. J.; Schwitters, R. F.] Univ Texas Austin, Austin, TX 78712 USA.
[Drummond, B. W.; Izen, J. M.; Lou, X. C.] Univ Texas Dallas, Richardson, TX 75083 USA.
[Bianchi, F.; Gamba, D.; Pelliccioni, M.] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy.
[Bianchi, F.; Gamba, D.; Pelliccioni, M.] Univ Torino, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
[Bomben, M.; Bosisio, L.; Cartaro, C.; Della Ricca, G.; Lanceri, L.; Vitale, L.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
[Bomben, M.; Bosisio, L.; Cartaro, C.; Della Ricca, G.; Lanceri, L.; Vitale, L.] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
[Azzolini, V.; Lopez-March, N.; Martinez-Vidal, F.; Milanes, D. A.; Oyanguren, A.] Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain.
[Albert, J.; Banerjee, Sw.; Bhuyan, B.; Choi, H. H. F.; Hamano, K.; Kowalewski, R.; Lewczuk, M. J.; Nugent, I. M.; Roney, J. M.; Sobie, R. J.] Univ Victoria, Victoria, BC V8W 3P6, Canada.
[Gershon, T. J.; Harrison, P. F.; Ilic, J.; Latham, T. E.; Mohanty, G. B.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
[Band, H. R.; Chen, X.; Dasu, S.; Flood, K. T.; Pan, Y.; Prepost, R.; Vuosalo, C. O.; Wu, S. L.] Univ Wisconsin, Madison, WI 53706 USA.
[Carpinelli, M.] Univ Sassari, I-07100 Sassari, Italy.
RP Aubert, B (reprint author), CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
RI Calabrese, Roberto/G-4405-2015; Martinez Vidal, F*/L-7563-2014;
Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Lusiani,
Alberto/N-2976-2015; Morandin, Mauro/A-3308-2016; Lusiani,
Alberto/A-3329-2016; Di Lodovico, Francesca/L-9109-2016; Pappagallo,
Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey,
Raymond/E-2830-2016; Monge, Maria Roberta/G-9127-2012; Oyanguren,
Arantza/K-6454-2014; Luppi, Eleonora/A-4902-2015; White,
Ryan/E-2979-2015; Patrignani, Claudia/C-5223-2009; Neri,
Nicola/G-3991-2012; Forti, Francesco/H-3035-2011; Rotondo,
Marcello/I-6043-2012; de Sangro, Riccardo/J-2901-2012; Saeed, Mohammad
Alam/J-7455-2012; Della Ricca, Giuseppe/B-6826-2013; Negrini,
Matteo/C-8906-2014
OI Raven, Gerhard/0000-0002-2897-5323; Calabrese,
Roberto/0000-0002-1354-5400; Martinez Vidal, F*/0000-0001-6841-6035;
Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere,
Maurizio/0000-0002-6520-4480; Lusiani, Alberto/0000-0002-6876-3288;
Morandin, Mauro/0000-0003-4708-4240; Lusiani,
Alberto/0000-0002-6876-3288; Di Lodovico, Francesca/0000-0003-3952-2175;
Pappagallo, Marco/0000-0001-7601-5602; Calcaterra,
Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636;
Monge, Maria Roberta/0000-0003-1633-3195; Oyanguren,
Arantza/0000-0002-8240-7300; Luppi, Eleonora/0000-0002-1072-5633; White,
Ryan/0000-0003-3589-5900; Patrignani, Claudia/0000-0002-5882-1747; Neri,
Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965;
Rotondo, Marcello/0000-0001-5704-6163; de Sangro,
Riccardo/0000-0002-3808-5455; Saeed, Mohammad Alam/0000-0002-3529-9255;
Della Ricca, Giuseppe/0000-0003-2831-6982; Negrini,
Matteo/0000-0003-0101-6963
FU US Department of Energy and National Science Foundation; Natural
Sciences and Engineering Research Council (Canada); Commissariat a
l'Energie Atomique and Institut National de Physique Nucleaire et de
Physique des Particules (France); Bundesministerium fur Bildung und
Forschung and Deutsche Forschungsgemeinschaft (Germany); Istituto
Nazionale di Fisica Nucleare (Italy); Foundation for Fundamental
Research on Matter (The Netherlands); Research Council of Norway;
Ministry of Education and Science of the Russian Federation; Ministerio
de Educacion y Ciencia (Spain); Science and Technology Facilities
Council (United Kingdom); Marie-Curie IEF program (European Union); A.
P. Sloan Foundation
FX We are grateful for the extraordinary contributions of our PEP-II
colleagues in achieving the excellent luminosity and machine conditions
that have made this work possible. The success of this project also
relies critically on the expertise and dedication of the computing
organizations that support BABAR. The collaborating institutions wish to
thank SLAC for its support and the kind hospitality extended to them.
This work is supported by the US Department of Energy and National
Science Foundation, the Natural Sciences and Engineering Research
Council (Canada), the Commissariat a l'Energie Atomique and Institut
National de Physique Nucleaire et de Physique des Particules (France),
the Bundesministerium fur Bildung und Forschung and Deutsche
Forschungsgemeinschaft (Germany), the Istituto Nazionale di Fisica
Nucleare (Italy), the Foundation for Fundamental Research on Matter (The
Netherlands), the Research Council of Norway, the Ministry of Education
and Science of the Russian Federation, Ministerio de Educacion y Ciencia
(Spain), and the Science and Technology Facilities Council (United
Kingdom). Individuals have received support from the Marie-Curie IEF
program (European Union) and the A. P. Sloan Foundation.
NR 51
TC 29
Z9 29
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 092002
DI 10.1103/PhysRevD.79.092002
PG 27
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800006
ER
PT J
AU Aubert, B
Karyotakis, Y
Lees, JP
Poireau, V
Prencipe, E
Prudent, X
Tisserand, V
Tico, JG
Grauges, E
Lopez, L
Palano, A
Pappagallo, M
Eigen, G
Stugu, B
Sun, L
Battaglia, M
Brown, DN
Kerth, LT
Kolomensky, YG
Lynch, G
Osipenkov, IL
Tackmann, K
Tanabe, T
Hawkes, CM
Soni, N
Watson, AT
Koch, H
Schroeder, T
Asgeirsson, DJ
Fulsom, BG
Hearty, C
Mattison, TS
McKenna, JA
Barrett, M
Khan, A
Randle-Conde, A
Blinov, VE
Bukin, AD
Buzykaev, AR
Druzhinin, VP
Golubev, VB
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Todyshev, KY
Bondioli, M
Curry, S
Eschrich, I
Kirkby, D
Lankford, AJ
Lund, P
Mandelkern, M
Martin, EC
Stoker, DP
Abachi, S
Buchanan, C
Atmacan, H
Gary, JW
Liu, F
Long, O
Vitug, GM
Yasin, Z
Zhang, L
Sharma, V
Campagnari, C
Hong, TM
Kovalskyi, D
Mazur, MA
Richman, JD
Beck, TW
Eisner, AM
Heusch, CA
Kroseberg, J
Lockman, WS
Martinez, AJ
Schalk, T
Schumm, BA
Seiden, A
Winstrom, LO
Cheng, CH
Doll, DA
Echenard, B
Fang, F
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Andreassen, R
Mancinelli, G
Meadows, BT
Mishra, K
Sokoloff, MD
Bloom, PC
Ford, WT
Gaz, A
Hirschauer, JF
Nagel, M
Nauenberg, U
Smith, JG
Wagner, SR
Ayad, R
Soffer, A
Toki, WH
Wilson, RJ
Feltresi, E
Hauke, A
Jasper, H
Karbach, M
Merkel, J
Petzold, A
Spaan, B
Wacker, K
Kobel, MJ
Nogowski, R
Schubert, KR
Schwierz, R
Volk, A
Bernard, D
Bonneaud, GR
Latour, E
Verderi, M
Clark, PJ
Playfer, S
Watson, JE
Andreotti, M
Bettoni, D
Bozzi, C
Calabrese, R
Cecchi, A
Cibinetto, G
Franchini, P
Luppi, E
Negrini, M
Petrella, A
Piemontese, L
Santoro, V
Baldini-Ferroli, R
Calcaterra, A
de Sangro, R
Finocchiaro, G
Pacetti, S
Patteri, P
Peruzzi, IM
Piccolo, M
Rama, M
Zallo, A
Contri, R
Guido, E
Lo Vetere, M
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Tosi, S
Chaisanguanthum, KS
Morii, M
Adametz, A
Marks, J
Schenk, S
Uwer, U
Bernlochner, FU
Klose, V
Lacker, HM
Bard, DJ
Dauncey, PD
Tibbetts, M
Behera, PK
Chai, X
Charles, MJ
Mallik, U
Cochran, J
Crawley, HB
Dong, L
Meyer, WT
Prell, S
Rosenberg, EI
Rubin, AE
Gao, YY
Gritsan, AV
Guo, ZJ
Arnaud, N
Bequilleux, J
D'Orazio, A
Davier, M
da Costa, JF
Grosdidier, G
Le Diberder, F
Lepeltier, V
Lutz, AM
Pruvot, S
Roudeau, P
Schune, MH
Serrano, J
Sordini, V
Stocchi, A
Wormser, G
Lange, DJ
Wright, DM
Bingham, I
Burke, JP
Chavez, CA
Fry, JR
Gabathuler, E
Gamet, R
Hutchcroft, DE
Payne, DJ
Touramanis, C
Bevan, AJ
Clarke, CK
Di Lodovico, F
Sacco, R
Sigamani, M
Cowan, G
Paramesvaran, S
Wren, AC
Brown, DN
Davis, CL
Denig, AG
Fritsch, M
Gradl, W
Hafner, A
Alwyn, KE
Bailey, D
Barlow, RJ
Jackson, G
Lafferty, GD
West, TJ
Yi, JI
Anderson, J
Chen, C
Jawahery, A
Roberts, DA
Simi, G
Tuggle, JM
Dallapiccola, C
Salvati, E
Saremi, S
Cowan, R
Dujmic, D
Fisher, PH
Henderson, SW
Sciolla, G
Spitznagel, M
Yamamoto, RK
Zhao, M
Patel, PM
Robertson, SH
Schram, M
Lazzaro, A
Lombardo, V
Palombo, F
Stracka, S
Bauer, JM
Cremaldi, L
Godang, R
Kroeger, R
Summers, DJ
Zhao, HW
Simard, M
Taras, P
Nicholson, H
De Nardo, G
Lista, L
Monorchio, D
Onorato, G
Sciacca, C
Raven, G
Snoek, HL
Jessop, CP
Knoepfel, KJ
LoSecco, JM
Wang, WF
Corwin, LA
Honscheid, K
Kagan, H
Kass, R
Morris, JP
Rahimi, AM
Regensburger, JJ
Sekula, SJ
Wong, QK
Blount, NL
Brau, J
Frey, R
Igonkina, O
Kolb, JA
Lu, M
Rahmat, R
Sinev, NB
Strom, D
Strube, J
Torrence, E
Castelli, G
Gagliardi, N
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Voci, C
Sanchez, PD
Ben-Haim, E
Briand, H
Chauveau, J
Hamon, O
Leruste, P
Ocariz, J
Perez, A
Prendki, J
Sitt, S
Gladney, L
Biasini, M
Manoni, E
Angelini, C
Batignani, G
Bettarini, S
Calderini, G
Carpinelli, M
Cervelli, A
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Morganti, M
Neri, N
Paoloni, E
Rizzo, G
Walsh, JJ
Pegna, DL
Lu, C
Olsen, J
Smith, AJS
Telnov, AV
Anulli, F
Baracchini, E
Cavoto, G
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Jackson, PD
Gioi, LL
Mazzoni, MA
Morganti, S
Piredda, G
Renga, F
Voena, C
Ebert, M
Hartmann, T
Schroder, H
Waldi, R
Adye, T
Franek, B
Olaiya, EO
Wilson, FF
Emery, S
Esteve, L
de Monchenault, GH
Kozanecki, W
Vasseur, G
Yeche, C
Zito, M
Chen, XR
Liu, H
Park, W
Purohit, MV
White, RM
Wilson, JR
Allen, MT
Aston, D
Bartoldus, R
Benitez, JF
Cenci, R
Coleman, JP
Convery, MR
Dingfelder, JC
Dorfan, J
Dubois-Felsmann, GP
Dunwoodie, W
Field, RC
Gabareen, AM
Graham, MT
Grenier, P
Hast, C
Innes, WR
Kaminski, J
Kelsey, MH
Kim, H
Kim, P
Kocian, ML
Leith, DWGS
Li, S
Lindquist, B
Luitz, S
Luth, V
Lynch, HL
MacFarlane, DB
Marsiske, H
Messner, R
Muller, DR
Neal, H
Nelson, S
O'Grady, CP
Ofte, I
Perl, M
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Snyder, A
Su, D
Sullivan, MK
Suzuki, K
Swain, SK
Thompson, JM
Va'vra, J
Wagner, AP
Weaver, M
West, CA
Wisniewski, WJ
Wittgen, M
Wright, DH
Wulsin, HW
Yarritu, AK
Yi, K
Young, CC
Ziegler, V
Burchat, PR
Edwards, AJ
Miyashita, TS
Ahmed, S
Alam, MS
Ernst, JA
Pan, B
Saeed, MA
Zain, SB
Spanier, SM
Wogsland, BJ
Eckmann, R
Ritchie, JL
Ruland, AM
Schilling, CJ
Schwitters, RF
Drummond, BW
Izen, JM
Lou, XC
Bianchi, F
Gamba, D
Pelliccioni, M
Bomben, M
Bosisio, L
Cartaro, C
Della Ricca, G
Lanceri, L
Vitale, L
Azzolini, V
Lopez-March, N
Martinez-Vidal, F
Milanes, DA
Oyanguren, A
Albert, J
Banerjee, S
Bhuyan, B
Choi, HHF
Hamano, K
King, GJ
Kowalewski, R
Lewczuk, MJ
Nugent, IM
Roney, JM
Sobie, RJ
Gershon, TJ
Harrison, PF
Ilic, J
Latham, TE
Mohanty, GB
Puccio, EMT
Band, HR
Chen, X
Dasu, S
Flood, KT
Pan, Y
Prepost, R
Vuosalo, CO
Wu, SL
AF Aubert, B.
Karyotakis, Y.
Lees, J. P.
Poireau, V.
Prencipe, E.
Prudent, X.
Tisserand, V.
Tico, J. Garra
Grauges, E.
Lopez, L.
Palano, A.
Pappagallo, M.
Eigen, G.
Stugu, B.
Sun, L.
Battaglia, M.
Brown, D. N.
Kerth, L. T.
Kolomensky, Yu. G.
Lynch, G.
Osipenkov, I. L.
Tackmann, K.
Tanabe, T.
Hawkes, C. M.
Soni, N.
Watson, A. T.
Koch, H.
Schroeder, T.
Asgeirsson, D. J.
Fulsom, B. G.
Hearty, C.
Mattison, T. S.
McKenna, J. A.
Barrett, M.
Khan, A.
Randle-Conde, A.
Blinov, V. E.
Bukin, A. D.
Buzykaev, A. R.
Druzhinin, V. P.
Golubev, V. B.
Onuchin, A. P.
Serednyakov, S. I.
Skovpen, Yu. I.
Solodov, E. P.
Todyshev, K. Yu.
Bondioli, M.
Curry, S.
Eschrich, I.
Kirkby, D.
Lankford, A. J.
Lund, P.
Mandelkern, M.
Martin, E. C.
Stoker, D. P.
Abachi, S.
Buchanan, C.
Atmacan, H.
Gary, J. W.
Liu, F.
Long, O.
Vitug, G. M.
Yasin, Z.
Zhang, L.
Sharma, V.
Campagnari, C.
Hong, T. M.
Kovalskyi, D.
Mazur, M. A.
Richman, J. D.
Beck, T. W.
Eisner, A. M.
Heusch, C. A.
Kroseberg, J.
Lockman, W. S.
Martinez, A. J.
Schalk, T.
Schumm, B. A.
Seiden, A.
Winstrom, L. O.
Cheng, C. H.
Doll, D. A.
Echenard, B.
Fang, F.
Hitlin, D. G.
Narsky, I.
Piatenko, T.
Porter, F. C.
Andreassen, R.
Mancinelli, G.
Meadows, B. T.
Mishra, K.
Sokoloff, M. D.
Bloom, P. C.
Ford, W. T.
Gaz, A.
Hirschauer, J. F.
Nagel, M.
Nauenberg, U.
Smith, J. G.
Wagner, S. R.
Ayad, R.
Soffer, A.
Toki, W. H.
Wilson, R. J.
Feltresi, E.
Hauke, A.
Jasper, H.
Karbach, M.
Merkel, J.
Petzold, A.
Spaan, B.
Wacker, K.
Kobel, M. J.
Nogowski, R.
Schubert, K. R.
Schwierz, R.
Volk, A.
Bernard, D.
Bonneaud, G. R.
Latour, E.
Verderi, M.
Clark, P. J.
Playfer, S.
Watson, J. E.
Andreotti, M.
Bettoni, D.
Bozzi, C.
Calabrese, R.
Cecchi, A.
Cibinetto, G.
Franchini, P.
Luppi, E.
Negrini, M.
Petrella, A.
Piemontese, L.
Santoro, V.
Baldini-Ferroli, R.
Calcaterra, A.
de Sangro, R.
Finocchiaro, G.
Pacetti, S.
Patteri, P.
Peruzzi, I. M.
Piccolo, M.
Rama, M.
Zallo, A.
Contri, R.
Guido, E.
Lo Vetere, M.
Monge, M. R.
Passaggio, S.
Patrignani, C.
Robutti, E.
Tosi, S.
Chaisanguanthum, K. S.
Morii, M.
Adametz, A.
Marks, J.
Schenk, S.
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CA BABAR Collaboration
TI Exclusive initial-state-radiation production of the D(D)over-bar,
D*(D)over-bar and D*(D)over-bar* systems
SO PHYSICAL REVIEW D
LA English
DT Article
ID Y(4260); CHARMONIUM; BABAR
AB We perform a study of the exclusive production of in initial-state-radiation events, from e(+)e(-) annihilations at a center-of-mass energy near 10.58 GeV, to search for charmonium and possible new resonances. The data sample corresponds to an integrated luminosity of 384 fb(-1) and was recorded by the BABAR experiment at the PEP-II storage rings. The D (D) over bar, D*(D) over bar, D*(D) over bar* mass spectra show clear evidence of several psi resonances. However, there is no evidence for Y(4260) -> D*(D) over bar or Y(4260) -> D*(D) over bar*.
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[Azzolini, V.; Lopez-March, N.; Martinez-Vidal, F.; Milanes, D. A.; Oyanguren, A.] Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain.
[Gershon, T. J.; Harrison, P. F.; Ilic, J.; Latham, T. E.; Mohanty, G. B.; Puccio, E. M. T.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
[Band, H. R.; Chen, X.; Dasu, S.; Flood, K. T.; Pan, Y.; Prepost, R.; Vuosalo, C. O.; Wu, S. L.] Univ Wisconsin, Madison, WI 53706 USA.
[Carpinelli, M.] Univ Sassari, I-07100 Sassari, Italy.
[Albert, J.; Banerjee, Sw.; Bhuyan, B.; Choi, H. H. F.; Hamano, K.; King, G. J.; Kowalewski, R.; Lewczuk, M. J.; Nugent, I. M.; Roney, J. M.; Sobie, R. J.] Univ Victoria, Victoria, BC V8W 3P6, Canada.
RP Aubert, B (reprint author), Univ Savoie, Lab Annecy Le Vieux Phys Particules, CNRS, IN2P3, F-74941 Annecy Le Vieux, France.
RI Frey, Raymond/E-2830-2016; White, Ryan/E-2979-2015; Calabrese,
Roberto/G-4405-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky,
Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Lusiani,
Alberto/N-2976-2015; Morandin, Mauro/A-3308-2016; Lusiani,
Alberto/A-3329-2016; Stracka, Simone/M-3931-2015; Di Lodovico,
Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016; Calcaterra,
Alessandro/P-5260-2015; Della Ricca, Giuseppe/B-6826-2013; Negrini,
Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Oyanguren,
Arantza/K-6454-2014; Bellini, Fabio/D-1055-2009; Luppi,
Eleonora/A-4902-2015; Patrignani, Claudia/C-5223-2009; Neri,
Nicola/G-3991-2012; Forti, Francesco/H-3035-2011; Rotondo,
Marcello/I-6043-2012; de Sangro, Riccardo/J-2901-2012; Saeed, Mohammad
Alam/J-7455-2012
OI Frey, Raymond/0000-0003-0341-2636; Cavoto, Gianluca/0000-0003-2161-918X;
Raven, Gerhard/0000-0002-2897-5323; White, Ryan/0000-0003-3589-5900;
Calabrese, Roberto/0000-0002-1354-5400; Martinez Vidal,
F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere,
Maurizio/0000-0002-6520-4480; Lusiani, Alberto/0000-0002-6876-3288;
Morandin, Mauro/0000-0003-4708-4240; Lusiani,
Alberto/0000-0002-6876-3288; Stracka, Simone/0000-0003-0013-4714; Di
Lodovico, Francesca/0000-0003-3952-2175; Pappagallo,
Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826;
Della Ricca, Giuseppe/0000-0003-2831-6982; Negrini,
Matteo/0000-0003-0101-6963; Monge, Maria Roberta/0000-0003-1633-3195;
Oyanguren, Arantza/0000-0002-8240-7300; Bellini,
Fabio/0000-0002-2936-660X; Luppi, Eleonora/0000-0002-1072-5633;
Patrignani, Claudia/0000-0002-5882-1747; Neri,
Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965;
Rotondo, Marcello/0000-0001-5704-6163; de Sangro,
Riccardo/0000-0002-3808-5455; Saeed, Mohammad Alam/0000-0002-3529-9255
FU U. S. Department of Energy and National Science Foundation; Natural
Sciences and Engineering Research Council (Canada); Commissariat a
l'Energie Atomique and Institut National de Physique Nucleaire et de
Physique des Particules (France); Bundesministerium fur Bildung und
Forschung and Deutsche Forschungsgemeinschaft (Germany); Istituto
Nazionale di Fisica Nucleare (Italy); Foundation for Fundamental
Research on Matter (The Netherlands); Research Council of Norway;
Ministry of Education and Science of the Russian Federation, Ministerio
de Educacion y Ciencia (Spain); Science and Technology Facilities
Council (United Kingdom); Marie Curie IEF program (European Union); A.
P. Sloan Foundation
FX We are grateful for the extraordinary contributions of our PEP-II
colleagues in achieving the excellent luminosity and machine conditions
that have made this work possible. The success of this project also
relies critically on the expertise and dedication of the computing
organizations that support BABAR. The collaborating institutions wish to
thank SLAC for its support and the kind hospitality extended to them.
This work is supported by the U. S. Department of Energy and National
Science Foundation, the Natural Sciences and Engineering Research
Council (Canada), the Commissariat a l'Energie Atomique and Institut
National de Physique Nucleaire et de Physique des Particules (France),
the Bundesministerium fur Bildung und Forschung and Deutsche
Forschungsgemeinschaft (Germany), the Istituto Nazionale di Fisica
Nucleare (Italy), the Foundation for Fundamental Research on Matter (The
Netherlands), the Research Council of Norway, the Ministry of Education
and Science of the Russian Federation, Ministerio de Educacion y Ciencia
(Spain), and the Science and Technology Facilities Council (United
Kingdom). Individuals have received support from the Marie Curie IEF
program (European Union) and the A. P. Sloan Foundation.
NR 24
TC 33
Z9 33
U1 0
U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 092001
DI 10.1103/PhysRevD.79.092001
PG 13
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800005
ER
PT J
AU Aubert, B
Karyotakis, Y
Lees, JP
Poireau, V
Prencipe, E
Prudent, X
Tisserand, V
Tico, J
Grauges, E
Martinelli, M
Palano, A
Pappagallo, M
Eigen, G
Stugu, B
Sun, L
Battaglia, M
Brown, DN
Kerth, LT
Kolomensky, YG
Lynch, G
Osipenkov, IL
Tackmann, K
Tanabe, T
Hawkes, CM
Soni, N
Watson, AT
Koch, H
Schroeder, T
Asgeirsson, DJ
Fulsom, BG
Hearty, C
Mattison, TS
McKenna, JA
Barrett, M
Khan, A
Randle-Conde, A
Blinov, VE
Bukin, AD
Buzykaev, AR
Druzhinin, VP
Golubev, VB
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Todyshev, KY
Bondioli, M
Curry, S
Eschrich, I
Kirkby, D
Lankford, AJ
Lund, P
Mandelkern, M
Martin, EC
Stoker, DP
Abachi, S
Buchanan, C
Atmacan, H
Gary, JW
Liu, F
Long, O
Vitug, GM
Yasin, Z
Zhang, L
Sharma, V
Campagnari, C
Hong, TM
Kovalskyi, D
Mazur, MA
Richman, JD
Beck, TW
Eisner, AM
Heusch, CA
Kroseberg, J
Lockman, WS
Martinez, AJ
Schalk, T
Schumm, BA
Seiden, A
Wang, L
Winstrom, LO
Cheng, CH
Doll, DA
Echenard, B
Fang, F
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Andreassen, R
Mancinelli, G
Meadows, BT
Mishra, K
Sokoloff, MD
Bloom, PC
Ford, WT
Gaz, A
Hirschauer, JF
Nagel, M
Nauenberg, U
Smith, JG
Wagner, SR
Ayad, R
Soffer, A
Toki, WH
Wilson, RJ
Feltresi, E
Hauke, A
Jasper, H
Karbach, TM
Merkel, J
Petzold, A
Spaan, B
Wacker, K
Kobel, MJ
Nogowski, R
Schubert, KR
Schwierz, R
Volk, A
Bernard, D
Bonneaud, GR
Latour, E
Verderi, M
Clark, PJ
Playfer, S
Watson, JE
Andreotti, M
Bettoni, D
Bozzi, C
Calabrese, R
Cecchi, A
Cibinetto, G
Fioravanti, E
Franchini, P
Luppi, E
Munerato, M
Negrini, M
Petrella, A
Piemontese, L
Santoro, V
Baldini-Ferroli, R
Calcaterra, A
de Sangro, R
Finocchiaro, G
Pacetti, S
Patteri, P
Peruzzi, IM
Piccolo, M
Rama, M
Zallo, A
Contri, R
Guido, E
Vetere, M
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Tosi, S
Chaisanguanthum, KS
Morii, M
Adametz, A
Marks, J
Schenk, S
Uwer, U
Bernlochner, FU
Klose, V
Lacker, HM
Bard, DJ
Dauncey, PD
Tibbetts, M
Behera, PK
Charles, MJ
Mallik, U
Cochran, J
Crawley, HB
Dong, L
Eyges, V
Meyer, WT
Prell, S
Rosenberg, EI
Rubin, AE
Gao, YY
Gritsan, AV
Guo, ZJ
Arnaud, N
Bequilleux, J
D'Orazio, A
Davier, M
Derkach, D
da Costa, JF
Grosdidier, G
Diberder, F
Lepeltier, V
Lutz, AM
Malaescu, B
Pruvot, S
Roudeau, P
Schune, MH
Serrano, J
Sordini, V
Stocchi, A
Wormser, G
Lange, DJ
Wright, DM
Bingham, I
Burke, JP
Chavez, CA
Fry, JR
Gabathuler, E
Gamet, R
Hutchcroft, DE
Payne, DJ
Touramanis, C
Bevan, AJ
Clarke, CK
Lodovico, F
Sacco, R
Sigamani, M
Cowan, G
Paramesvaran, S
Wren, AC
Brown, DN
Davis, CL
Denig, AG
Fritsch, M
Gradl, W
Hafner, A
Alwyn, KE
Bailey, D
Barlow, RJ
Jackson, G
Lafferty, GD
West, TJ
Yi, JI
Anderson, J
Chen, C
Jawahery, A
Roberts, DA
Simi, G
Tuggle, JM
Dallapiccola, C
Salvati, E
Saremi, S
Cowan, R
Dujmic, D
Fisher, PH
Henderson, SW
Sciolla, G
Spitznagel, M
Yamamoto, RK
Zhao, M
Patel, PM
Robertson, SH
Schram, M
Lazzaro, A
Lombardo, V
Palombo, F
Stracka, S
Bauer, JM
Cremaldi, L
Godang, R
Kroeger, R
Sonnek, P
Summers, DJ
Zhao, HW
Simard, M
Taras, P
Nicholson, H
Nardo, G
Lista, L
Monorchio, D
Onorato, G
Sciacca, C
Raven, G
Snoek, HL
Jessop, CP
Knoepfel, KJ
LoSecco, JM
Wang, WF
Corwin, LA
Honscheid, K
Kagan, H
Kass, R
Morris, JP
Rahimi, AM
Regensburger, JJ
Sekula, SJ
Wong, QK
Blount, NL
Brau, J
Frey, R
Igonkina, O
Kolb, JA
Lu, M
Rahmat, R
Sinev, NB
Strom, D
Strube, J
Torrence, E
Castelli, G
Gagliardi, N
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Voci, C
Sanchez, PD
Ben-Haim, E
Briand, H
Chauveau, J
Hamon, O
Leruste, P
Marchiori, G
Ocariz, J
Perez, A
Prendki, J
Sitt, S
Gladney, L
Biasini, M
Manoni, E
Angelini, C
Batignani, G
Bettarini, S
Calderini, G
Carpinelli, M
Cervelli, A
Forti, F
Giorgi, MA
Lusiani, A
Morganti, M
Neri, N
Paoloni, E
Rizzo, G
Walsh, JJ
Pegna, DL
Lu, C
Olsen, J
Smith, AJS
Telnov, AV
Anulli, F
Baracchini, E
Cavoto, G
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Jackson, PD
Gioi, L
Mazzoni, MA
Morganti, S
Piredda, G
Renga, F
Voena, C
Ebert, M
Hartmann, T
Schroder, H
Waldi, R
Adye, T
Franek, B
Olaiya, EO
Wilson, FF
Emery, S
Esteve, L
de Monchenault, GH
Kozanecki, W
Vasseur, G
Yeche, C
Zito, M
Allen, MT
Aston, D
Bartoldus, R
Benitez, JF
Cenci, R
Coleman, JP
Convery, MR
Dingfelder, JC
Dorfan, J
Dubois-Felsmann, GP
Dunwoodie, W
Field, RC
Gabareen, AM
Graham, MT
Grenier, P
Hast, C
Innes, WR
Kaminski, J
Kelsey, MH
Kim, H
Kim, P
Kocian, ML
Leith, DWGS
Li, S
Lindquist, B
Luitz, S
Luth, V
Lynch, HL
MacFarlane, DB
Marsiske, H
Messner, R
Muller, DR
Neal, H
Nelson, S
O'Grady, CP
Ofte, I
Perl, M
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Snyder, A
Su, D
Sullivan, MK
Suzuki, K
Swain, SK
Thompson, JM
Va'vra, J
Wagner, AP
Weaver, M
West, CA
Wisniewski, WJ
Wittgen, M
Wright, DH
Wulsin, HW
Yarritu, AK
Yi, K
Young, CC
Ziegler, V
Chen, XR
Liu, H
Park, W
Purohit, MV
White, RM
Wilson, JR
Burchat, PR
Edwards, AJ
Miyashita, TS
Ahmed, S
Alam, MS
Ernst, JA
Pan, B
Saeed, MA
Zain, SB
Spanier, SM
Wogsland, BJ
Eckmann, R
Ritchie, JL
Ruland, AM
Schilling, CJ
Schwitters, RF
Wray, BC
Drummond, BW
Izen, JM
Lou, XC
Bianchi, F
Gamba, D
Pelliccioni, M
Bomben, M
Bosisio, L
Cartaro, C
Ricca, G
Lanceri, L
Vitale, L
Azzolini, V
Lopez-March, N
Martinez-Vidal, F
Milanes, DA
Oyanguren, A
Albert, J
Banerjee, S
Bhuyan, B
Choi, HHF
Hamano, K
King, GJ
Kowalewski, R
Lewczuk, MJ
Nugent, IM
Roney, JM
Sobie, RJ
Gershon, TJ
Harrison, PF
Ilic, J
Latham, TE
Mohanty, GB
Puccio, EMT
Band, HR
Chen, X
Dasu, S
Flood, KT
Pan, Y
Prepost, R
Vuosalo, CO
Wu, SL
AF Aubert, B.
Karyotakis, Y.
Lees, J. P.
Poireau, V.
Prencipe, E.
Prudent, X.
Tisserand, V.
Garra Tico, J.
Grauges, E.
Martinelli, M.
Palano, A.
Pappagallo, M.
Eigen, G.
Stugu, B.
Sun, L.
Battaglia, M.
Brown, D. N.
Kerth, L. T.
Kolomensky, Yu. G.
Lynch, G.
Osipenkov, I. L.
Tackmann, K.
Tanabe, T.
Hawkes, C. M.
Soni, N.
Watson, A. T.
Koch, H.
Schroeder, T.
Asgeirsson, D. J.
Fulsom, B. G.
Hearty, C.
Mattison, T. S.
McKenna, J. A.
Barrett, M.
Khan, A.
Randle-Conde, A.
Blinov, V. E.
Bukin, A. D.
Buzykaev, A. R.
Druzhinin, V. P.
Golubev, V. B.
Onuchin, A. P.
Serednyakov, S. I.
Skovpen, Yu. I.
Solodov, E. P.
Todyshev, K. Yu.
Bondioli, M.
Curry, S.
Eschrich, I.
Kirkby, D.
Lankford, A. J.
Lund, P.
Mandelkern, M.
Martin, E. C.
Stoker, D. P.
Abachi, S.
Buchanan, C.
Atmacan, H.
Gary, J. W.
Liu, F.
Long, O.
Vitug, G. M.
Yasin, Z.
Zhang, L.
Sharma, V.
Campagnari, C.
Hong, T. M.
Kovalskyi, D.
Mazur, M. A.
Richman, J. D.
Beck, T. W.
Eisner, A. M.
Heusch, C. A.
Kroseberg, J.
Lockman, W. S.
Martinez, A. J.
Schalk, T.
Schumm, B. A.
Seiden, A.
Wang, L.
Winstrom, L. O.
Cheng, C. H.
Doll, D. A.
Echenard, B.
Fang, F.
Hitlin, D. G.
Narsky, I.
Piatenko, T.
Porter, F. C.
Andreassen, R.
Mancinelli, G.
Meadows, B. T.
Mishra, K.
Sokoloff, M. D.
Bloom, P. C.
Ford, W. T.
Gaz, A.
Hirschauer, J. F.
Nagel, M.
Nauenberg, U.
Smith, J. G.
Wagner, S. R.
Ayad, R.
Soffer, A.
Toki, W. H.
Wilson, R. J.
Feltresi, E.
Hauke, A.
Jasper, H.
Karbach, T. M.
Merkel, J.
Petzold, A.
Spaan, B.
Wacker, K.
Kobel, M. J.
Nogowski, R.
Schubert, K. R.
Schwierz, R.
Volk, A.
Bernard, D.
Bonneaud, G. R.
Latour, E.
Verderi, M.
Clark, P. J.
Playfer, S.
Watson, J. E.
Andreotti, M.
Bettoni, D.
Bozzi, C.
Calabrese, R.
Cecchi, A.
Cibinetto, G.
Fioravanti, E.
Franchini, P.
Luppi, E.
Munerato, M.
Negrini, M.
Petrella, A.
Piemontese, L.
Santoro, V.
Baldini-Ferroli, R.
Calcaterra, A.
de Sangro, R.
Finocchiaro, G.
Pacetti, S.
Patteri, P.
Peruzzi, I. M.
Piccolo, M.
Rama, M.
Zallo, A.
Contri, R.
Guido, E.
Lo Vetere, M.
Monge, M. R.
Passaggio, S.
Patrignani, C.
Robutti, E.
Tosi, S.
Chaisanguanthum, K. S.
Morii, M.
Adametz, A.
Marks, J.
Schenk, S.
Uwer, U.
Bernlochner, F. U.
Klose, V.
Lacker, H. M.
Bard, D. J.
Dauncey, P. D.
Tibbetts, M.
Behera, P. K.
Charles, M. J.
Mallik, U.
Cochran, J.
Crawley, H. B.
Dong, L.
Eyges, V.
Meyer, W. T.
Prell, S.
Rosenberg, E. I.
Rubin, A. E.
Gao, Y. Y.
Gritsan, A. V.
Guo, Z. J.
Arnaud, N.
Bequilleux, J.
D'Orazio, A.
Davier, M.
Derkach, D.
da Costa, J. Firmino
Grosdidier, G.
Le Diberder, F.
Lepeltier, V.
Lutz, A. M.
Malaescu, B.
Pruvot, S.
Roudeau, P.
Schune, M. H.
Serrano, J.
Sordini, V.
Stocchi, A.
Wormser, G.
Lange, D. J.
Wright, D. M.
Bingham, I.
Burke, J. P.
Chavez, C. A.
Fry, J. R.
Gabathuler, E.
Gamet, R.
Hutchcroft, D. E.
Payne, D. J.
Touramanis, C.
Bevan, A. J.
Clarke, C. K.
Di Lodovico, F.
Sacco, R.
Sigamani, M.
Cowan, G.
Paramesvaran, S.
Wren, A. C.
Brown, D. N.
Davis, C. L.
Denig, A. G.
Fritsch, M.
Gradl, W.
Hafner, A.
Alwyn, K. E.
Bailey, D.
Barlow, R. J.
Jackson, G.
Lafferty, G. D.
West, T. J.
Yi, J. I.
Anderson, J.
Chen, C.
Jawahery, A.
Roberts, D. A.
Simi, G.
Tuggle, J. M.
Dallapiccola, C.
Salvati, E.
Saremi, S.
Cowan, R.
Dujmic, D.
Fisher, P. H.
Henderson, S. W.
Sciolla, G.
Spitznagel, M.
Yamamoto, R. K.
Zhao, M.
Patel, P. M.
Robertson, S. H.
Schram, M.
Lazzaro, A.
Lombardo, V.
Palombo, F.
Stracka, S.
Bauer, J. M.
Cremaldi, L.
Godang, R.
Kroeger, R.
Sonnek, P.
Summers, D. J.
Zhao, H. W.
Simard, M.
Taras, P.
Nicholson, H.
De Nardo, G.
Lista, L.
Monorchio, D.
Onorato, G.
Sciacca, C.
Raven, G.
Snoek, H. L.
Jessop, C. P.
Knoepfel, K. J.
LoSecco, J. M.
Wang, W. F.
Corwin, L. A.
Honscheid, K.
Kagan, H.
Kass, R.
Morris, J. P.
Rahimi, A. M.
Regensburger, J. J.
Sekula, S. J.
Wong, Q. K.
Blount, N. L.
Brau, J.
Frey, R.
Igonkina, O.
Kolb, J. A.
Lu, M.
Rahmat, R.
Sinev, N. B.
Strom, D.
Strube, J.
Torrence, E.
Castelli, G.
Gagliardi, N.
Margoni, M.
Morandin, M.
Posocco, M.
Rotondo, M.
Simonetto, F.
Stroili, R.
Voci, C.
Sanchez, P. del Amo
Ben-Haim, E.
Briand, H.
Chauveau, J.
Hamon, O.
Leruste, Ph.
Marchiori, G.
Ocariz, J.
Perez, A.
Prendki, J.
Sitt, S.
Gladney, L.
Biasini, M.
Manoni, E.
Angelini, C.
Batignani, G.
Bettarini, S.
Calderini, G.
Carpinelli, M.
Cervelli, A.
Forti, F.
Giorgi, M. A.
Lusiani, A.
Morganti, M.
Neri, N.
Paoloni, E.
Rizzo, G.
Walsh, J. J.
Pegna, D. Lopes
Lu, C.
Olsen, J.
Smith, A. J. S.
Telnov, A. V.
Anulli, F.
Baracchini, E.
Cavoto, G.
Faccini, R.
Ferrarotto, F.
Ferroni, F.
Gaspero, M.
Jackson, P. D.
Li Gioi, L.
Mazzoni, M. A.
Morganti, S.
Piredda, G.
Renga, F.
Voena, C.
Ebert, M.
Hartmann, T.
Schroder, H.
Waldi, R.
Adye, T.
Franek, B.
Olaiya, E. O.
Wilson, F. F.
Emery, S.
Esteve, L.
de Monchenault, G. Hamel
Kozanecki, W.
Vasseur, G.
Yeche, Ch.
Zito, M.
Allen, M. T.
Aston, D.
Bartoldus, R.
Benitez, J. F.
Cenci, R.
Coleman, J. P.
Convery, M. R.
Dingfelder, J. C.
Dorfan, J.
Dubois-Felsmann, G. P.
Dunwoodie, W.
Field, R. C.
Gabareen, A. M.
Graham, M. T.
Grenier, P.
Hast, C.
Innes, W. R.
Kaminski, J.
Kelsey, M. H.
Kim, H.
Kim, P.
Kocian, M. L.
Leith, D. W. G. S.
Li, S.
Lindquist, B.
Luitz, S.
Luth, V.
Lynch, H. L.
MacFarlane, D. B.
Marsiske, H.
Messner, R.
Muller, D. R.
Neal, H.
Nelson, S.
O'Grady, C. P.
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Schindler, R. H.
Schwiening, J.
Snyder, A.
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Swain, S. K.
Thompson, J. M.
Va'vra, J.
Wagner, A. P.
Weaver, M.
West, C. A.
Wisniewski, W. J.
Wittgen, M.
Wright, D. H.
Wulsin, H. W.
Yarritu, A. K.
Yi, K.
Young, C. C.
Ziegler, V.
Chen, X. R.
Liu, H.
Park, W.
Purohit, M. V.
White, R. M.
Wilson, J. R.
Burchat, P. R.
Edwards, A. J.
Miyashita, T. S.
Ahmed, S.
Alam, M. S.
Ernst, J. A.
Pan, B.
Saeed, M. A.
Zain, S. B.
Spanier, S. M.
Wogsland, B. J.
Eckmann, R.
Ritchie, J. L.
Ruland, A. M.
Schilling, C. J.
Schwitters, R. F.
Wray, B. C.
Drummond, B. W.
Izen, J. M.
Lou, X. C.
Bianchi, F.
Gamba, D.
Pelliccioni, M.
Bomben, M.
Bosisio, L.
Cartaro, C.
Della Ricca, G.
Lanceri, L.
Vitale, L.
Azzolini, V.
Lopez-March, N.
Martinez-Vidal, F.
Milanes, D. A.
Oyanguren, A.
Albert, J.
Banerjee, Sw.
Bhuyan, B.
Choi, H. H. F.
Hamano, K.
King, G. J.
Kowalewski, R.
Lewczuk, M. J.
Nugent, I. M.
Roney, J. M.
Sobie, R. J.
Gershon, T. J.
Harrison, P. F.
Ilic, J.
Latham, T. E.
Mohanty, G. B.
Puccio, E. M. T.
Band, H. R.
Chen, X.
Dasu, S.
Flood, K. T.
Pan, Y.
Prepost, R.
Vuosalo, C. O.
Wu, S. L.
CA BABAR Collaboration
TI Search for the rare leptonic decays B+ -> l(+) nu(l) (l = e, mu)
SO PHYSICAL REVIEW D
LA English
DT Article
AB We have performed a search for the rare leptonic decays B+ -> l(+) nu(l)(l = e, mu), using data collected at the Upsilon(4S) resonance by the BABAR detector at the PEP-II storage ring. In a sample of 468 x 10(6) B (B) over bar pairs we find no evidence for a signal and set an upper limit on the branching fractions B(B+ -> mu(+)nu(mu)) < 1.0 x 10(-6) and B(B+ -> e(+) nu(e)) < 1.9 x 10(-6) at the 90% confidence level, using a Bayesian approach.
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[Garra Tico, J.; Grauges, E.] Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, Spain.
[Martinelli, M.; Palano, A.; Pappagallo, M.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
[Martinelli, M.; Palano, A.; Pappagallo, M.] Univ Bari, Dipartmento Fis, I-70126 Bari, Italy.
[Eigen, G.; Stugu, B.; Sun, L.] Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
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[Hawkes, C. M.; Soni, N.; Watson, A. T.] Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
[Koch, H.; Schroeder, T.] Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany.
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[Barrett, M.; Khan, A.; Randle-Conde, A.] Brunel Univ, Uxbridge UB8 3PH, Middx, England.
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[Sharma, V.] Univ Calif San Diego, La Jolla, CA 92093 USA.
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[Baldini-Ferroli, R.; Calcaterra, A.; de Sangro, R.; Finocchiaro, G.; Pacetti, S.; Patteri, P.; Peruzzi, I. M.; Piccolo, M.; Rama, M.; Zallo, A.] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
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[Chaisanguanthum, K. S.; Morii, M.] Harvard Univ, Cambridge, MA 02138 USA.
[Adametz, A.; Marks, J.; Schenk, S.; Uwer, U.] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany.
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[Bard, D. J.; Dauncey, P. D.; Tibbetts, M.] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England.
[Behera, P. K.; Charles, M. J.; Mallik, U.] Univ Iowa, Iowa City, IA 52242 USA.
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[Brown, D. N.; Davis, C. L.] Univ Louisville, Louisville, KY 40292 USA.
[Denig, A. G.; Fritsch, M.; Gradl, W.; Hafner, A.] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany.
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[Patel, P. M.; Robertson, S. H.; Schram, M.] McGill Univ, Montreal, PQ H3A 2T8, Canada.
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[Lazzaro, A.; Lombardo, V.; Palombo, F.; Stracka, S.] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
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[Nicholson, H.] Mt Holyoke Coll, S Hadley, MA 01075 USA.
[De Nardo, G.; Lista, L.; Monorchio, D.; Onorato, G.; Sciacca, C.] Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy.
[De Nardo, G.; Lista, L.; Monorchio, D.; Onorato, G.; Sciacca, C.] Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy.
[Raven, G.; Snoek, H. L.; Jessop, C. P.] NIKHEF, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands.
[Jessop, C. P.; Knoepfel, K. J.; LoSecco, J. M.; Wang, W. F.] Univ Notre Dame, Notre Dame, IN 46556 USA.
[Corwin, L. A.; Honscheid, K.; Kagan, H.; Kass, R.; Morris, J. P.; Rahimi, A. M.; Regensburger, J. J.; Sekula, S. J.; Wong, Q. K.] Ohio State Univ, Columbus, OH 43210 USA.
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[Strom, D.; Castelli, G.; Gagliardi, N.; Margoni, M.; Morandin, M.; Posocco, M.; Rotondo, M.; Simonetto, F.; Voci, C.] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
[Castelli, G.; Gagliardi, N.; Margoni, M.; Simonetto, F.; Stroili, R.; Voci, C.] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
[Sanchez, P. del Amo; Ben-Haim, E.; Briand, H.; Chauveau, J.; Hamon, O.; Leruste, Ph.; Marchiori, G.; Ocariz, J.; Perez, A.; Prendki, J.; Sitt, S.] Univ Paris 06, Univ Paris 07, Lab Phys Nucl & Hautes Energies, IN2P3,CNRS, F-75252 Paris, France.
[Gladney, L.] Univ Penn, Philadelphia, PA 19104 USA.
[Biasini, M.; Manoni, E.] Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy.
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[Angelini, C.; Batignani, G.; Bettarini, S.; Calderini, G.; Carpinelli, M.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Lusiani, A.; Neri, N.; Paoloni, E.; Rizzo, G.; Walsh, J. J.; Morganti, S.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
[Angelini, C.; Batignani, G.; Bettarini, S.; Calderini, G.; Carpinelli, M.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Lusiani, A.; Morganti, M.; Neri, N.; Paoloni, E.; Rizzo, G.] Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy.
[Pegna, D. Lopes; Lu, C.; Olsen, J.; Smith, A. J. S.; Telnov, A. V.] Scuola Normale Super Pisa, I-56127 Pisa, Italy.
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[Baracchini, E.; Faccini, R.; Ferroni, F.; Gaspero, M.; Renga, F.] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy.
[Baracchini, E.; Faccini, R.; Ferroni, F.; Gaspero, M.; Renga, F.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
[Ebert, M.; Hartmann, T.; Schroder, H.; Waldi, R.; Adye, T.] Univ Rostock, D-18051 Rostock, Germany.
[Adye, T.; Franek, B.; Olaiya, E. O.; Wilson, F. F.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Emery, S.; Esteve, L.; de Monchenault, G. Hamel; Kozanecki, W.; Vasseur, G.; Yeche, Ch.; Zito, M.] CEA, Ctr Saclay, SPP, F-91191 Gif Sur Yvette, France.
[Allen, M. T.; Aston, D.; Bartoldus, R.; Benitez, J. F.; Cenci, R.; Coleman, J. P.; Convery, M. R.; Dingfelder, J. C.; Dorfan, J.; Dubois-Felsmann, G. P.; Dunwoodie, W.; Field, R. C.; Gabareen, A. M.; Graham, M. T.; Grenier, P.; Hast, C.; Innes, W. R.; Kaminski, J.; Kelsey, M. H.; Kim, H.; Kim, P.; Kocian, M. L.; Leith, D. W. G. S.; Li, S.; Lindquist, B.; Luitz, S.; Luth, V.; Lynch, H. L.; MacFarlane, D. B.; Marsiske, H.; Messner, R.; Muller, D. R.; Neal, H.; Nelson, S.; O'Grady, C. P.; Ofte, I.; Perl, M.; Ratcliff, B. N.; Roodman, A.; Salnikov, A. A.; Schindler, R. H.; Schwiening, J.; Snyder, A.; Su, D.; Sullivan, M. K.; Suzuki, K.; Swain, S. K.; Thompson, J. M.; Va'vra, J.; Wagner, A. P.; Weaver, M.; West, C. A.; Wisniewski, W. J.; Wittgen, M.; Wright, D. H.; Wulsin, H. W.; Yarritu, A. K.; Yi, K.; Young, C. C.; Ziegler, V.] Stanford Linear Accelerator Ctr, Natl Accelerator Lab, Stanford, CA 94309 USA.
[Chen, X. R.; Liu, H.; Park, W.; Purohit, M. V.; White, R. M.; Wilson, J. R.] Univ S Carolina, Columbia, SC 29208 USA.
[Burchat, P. R.; Edwards, A. J.; Miyashita, T. S.] Stanford Univ, Stanford, CA 94305 USA.
[Ahmed, S.; Alam, M. S.; Ernst, J. A.; Saeed, M. A.; Zain, S. B.; Pan, Y.] SUNY Albany, Albany, NY 12222 USA.
[Spanier, S. M.; Wogsland, B. J.] Univ Tennessee, Knoxville, TN 37996 USA.
[Eckmann, R.; Ritchie, J. L.; Ruland, A. M.; Schilling, C. J.; Schwitters, R. F.; Wray, B. C.] Univ Texas Austin, Austin, TX 78712 USA.
[Drummond, B. W.; Izen, J. M.; Lou, X. C.] Univ Texas Dallas, Richardson, TX 75083 USA.
[Bianchi, F.; Gamba, D.; Pelliccioni, M.] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy.
[Bianchi, F.; Gamba, D.; Pelliccioni, M.] Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
[Bomben, M.; Bosisio, L.; Cartaro, C.; Della Ricca, G.; Lanceri, L.; Vitale, L.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
[Bomben, M.; Bosisio, L.; Cartaro, C.; Della Ricca, G.; Lanceri, L.; Vitale, L.] Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy.
[Azzolini, V.; Lopez-March, N.; Martinez-Vidal, F.; Milanes, D. A.; Oyanguren, A.] Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
Univ Sassari, I-07100 Sassari, Italy.
[Azzolini, V.; Lopez-March, N.; Martinez-Vidal, F.; Milanes, D. A.; Oyanguren, A.] Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain.
[Albert, J.; Banerjee, Sw.; Bhuyan, B.; Choi, H. H. F.; Hamano, K.; King, G. J.; Kowalewski, R.; Lewczuk, M. J.; Nugent, I. M.; Roney, J. M.; Sobie, R. J.] Univ Victoria, Victoria, BC V8W 3P6, Canada.
[Gershon, T. J.; Harrison, P. F.; Ilic, J.; Latham, T. E.; Mohanty, G. B.; Puccio, E. M. T.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
[Band, H. R.; Chen, X.; Dasu, S.; Flood, K. T.; Pan, Y.; Prepost, R.; Vuosalo, C. O.; Wu, S. L.] Univ Wisconsin, Madison, WI 53706 USA.
[Battaglia, M.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G.; Osipenkov, I. L.; Tackmann, K.; Tanabe, T.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Arnaud, N.; Bequilleux, J.; D'Orazio, A.; Davier, M.; Derkach, D.; da Costa, J. Firmino; Grosdidier, G.; Le Diberder, F.; Lepeltier, V.; Lutz, A. M.; Malaescu, B.; Pruvot, S.; Roudeau, P.; Schune, M. H.; Serrano, J.; Sordini, V.; Stocchi, A.; Wormser, G.] Univ Paris 11, Ctr Sci Orsay, F-91898 Orsay, France.
RP Aubert, B (reprint author), Univ Savoie, LAPP, CNRS, IN2P3, F-74941 Annecy Le Vieux, France.
RI Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere,
Maurizio/J-5049-2012; Lusiani, Alberto/N-2976-2015; Lusiani,
Alberto/A-3329-2016; Morandin, Mauro/A-3308-2016; Stracka,
Simone/M-3931-2015; Della Ricca, Giuseppe/B-6826-2013; Di Lodovico,
Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016; Calcaterra,
Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Oyanguren,
Arantza/K-6454-2014; Luppi, Eleonora/A-4902-2015; White,
Ryan/E-2979-2015; Calabrese, Roberto/G-4405-2015; Patrignani,
Claudia/C-5223-2009; Neri, Nicola/G-3991-2012; Forti,
Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; de Sangro,
Riccardo/J-2901-2012; Saeed, Mohammad Alam/J-7455-2012; Negrini,
Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012
OI Strube, Jan/0000-0001-7470-9301; Chen, Chunhui /0000-0003-1589-9955;
Raven, Gerhard/0000-0002-2897-5323; Hamel de Monchenault,
Gautier/0000-0002-3872-3592; Lanceri, Livio/0000-0001-8220-3095; Ebert,
Marcus/0000-0002-3014-1512; Corwin, Luke/0000-0001-7143-3821; Sciacca,
Crisostomo/0000-0002-8412-4072; Adye, Tim/0000-0003-0627-5059; Lafferty,
George/0000-0003-0658-4919; Martinelli, Maurizio/0000-0003-4792-9178;
Wilson, Robert/0000-0002-8184-4103; Martinez Vidal,
F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere,
Maurizio/0000-0002-6520-4480; Lusiani, Alberto/0000-0002-6876-3288;
Lusiani, Alberto/0000-0002-6876-3288; Morandin,
Mauro/0000-0003-4708-4240; Stracka, Simone/0000-0003-0013-4714; Della
Ricca, Giuseppe/0000-0003-2831-6982; Di Lodovico,
Francesca/0000-0003-3952-2175; Pappagallo, Marco/0000-0001-7601-5602;
Calcaterra, Alessandro/0000-0003-2670-4826; Frey,
Raymond/0000-0003-0341-2636; Oyanguren, Arantza/0000-0002-8240-7300;
Luppi, Eleonora/0000-0002-1072-5633; White, Ryan/0000-0003-3589-5900;
Calabrese, Roberto/0000-0002-1354-5400; Patrignani,
Claudia/0000-0002-5882-1747; Neri, Nicola/0000-0002-6106-3756; Forti,
Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163; de
Sangro, Riccardo/0000-0002-3808-5455; Saeed, Mohammad
Alam/0000-0002-3529-9255; Negrini, Matteo/0000-0003-0101-6963; Monge,
Maria Roberta/0000-0003-1633-3195
FU DOE; NSF (USA); NSERC (Canada); CEA; CNRS-IN2P3 (France); BMBF; DFG
(Germany); INFN (Italy); FOM (The Netherlands); NFR (Norway); MES
(Russia); MEC (Spain); STFC ( United Kingdom); Marie Curie EIF (European
Union); A. P. Sloan Foundation
FX We are grateful for the excellent luminosity and machine conditions
provided by our PEP-II colleagues and for the substantial dedicated
effort from the computing organizations that support BABAR. The
collaborating institutions wish to thank SLAC for its support and kind
hospitality. This work is supported by DOE and NSF (USA), NSERC
(Canada), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN
(Italy), FOM (The Netherlands), NFR (Norway), MES (Russia), MEC (Spain),
and STFC (United Kingdom). Individuals have received support from the
Marie Curie EIF (European Union) and the A. P. Sloan Foundation.
NR 21
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 091101
DI 10.1103/PhysRevD.79.091101
PG 9
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800001
ER
PT J
AU Bai, Y
Han, ZY
AF Bai, Yang
Han, Zhenyu
TI Unified dark matter model in a singlet extension of the universal extra
dimension model
SO PHYSICAL REVIEW D
LA English
DT Article
DE cosmic ray energy spectra; cosmology; dark matter; electrons; galaxies;
neutrinos; standard model
ID ENERGIES; HIGGS
AB We propose a dark matter model with standard model singlet extension of the universal extra dimension model to explain the recent observations of ATIC, PPB-BETS, PAMELA, and DAMA. Other than the standard model fields propagating in the bulk of a five-dimensional space, one fermion field and one scalar field are introduced and both are standard model singlets. The zero mode of the new fermion is identified as the right-handed neutrino, while its first Klein-Kaluza (KK) mode is the lightest KK-odd particle and the dark matter candidate. The cosmic ray spectra from ATIC and PPB-BETS determine the dark matter particle mass and hence the fifth dimension compactification scale to be 1.0-1.6 TeV. The zero mode of the singlet scalar field with a mass below 1 GeV provides an attractive force between dark matter particles, which allows a Sommerfeld enhancement to boost the annihilation cross section in the Galactic halo to explain the PAMELA data. The DAMA annual modulation results are explained by coupling the same scalar field to the electron via a higher-dimensional operator. We analyze the model parameter space that can satisfy the dark matter relic abundance and accommodate all the dark matter detection experiments. We also consider constraints from the diffuse extragalactic gamma-ray background, which can be satisfied if the dark matter particle and the first KK mode of the scalar field have highly degenerate masses.
C1 [Bai, Yang] Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA.
[Han, Zhenyu] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
RP Bai, Y (reprint author), Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA.
EM bai@fnal.gov; zhenyuhan@physics.ucdavis.edu
FU United States Department of Energy [DE-FG03-91ER40674]; LLC
[DE-AC02-07CH11359]; United States Department of Energy
FX Many thanks to Patrick Fox for interesting discussions and Marco Cirelli
for useful correspondences. Z. H. is supported in part by the United
States Department of Energy Grant No. DE-FG03-91ER40674. Fermilab is
operated by Fermi Research Alliance, LLC under Contract No.
DE-AC02-07CH11359 with the United States Department of Energy.
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 095023
DI 10.1103/PhysRevD.79.095023
PG 8
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800080
ER
PT J
AU Carena, M
Medina, AD
Shah, NR
Wagner, CEM
AF Carena, Marcela
Medina, Anibal D.
Shah, Nausheen R.
Wagner, Carlos E. M.
TI Gauge-Higgs unification, neutrino masses, and dark matter in warped
extra dimensions
SO PHYSICAL REVIEW D
LA English
DT Article
ID RANDALL-SUNDRUM MODEL; FERMION MASSES; HIERARCHY; SYMMETRY; FIELDS;
SCATTERING; MECHANISM; ENERGIES; GEOMETRY; S-1/Z(2)
AB Gauge-Higgs unification in warped extra dimensions provides an attractive solution to the hierarchy problem. The extension of the standard model gauge symmetry to SO(5)xU(1)(X) allows the incorporation of the custodial symmetry SU(2)(R) plus a Higgs boson doublet with the right quantum numbers under the gauge group. In the minimal model, the Higgs mass is in the range 110-150 GeV, while a light Kaluza-Klein excitation of the top quark appears in the spectrum, providing agreement with precision electroweak measurements and a possible test of the model at a high luminosity LHC. The extension of the model to the lepton sector has several interesting features. We discuss the conditions necessary to obtain realistic charged lepton and neutrino masses. After the addition of an exchange symmetry in the bulk, we show that the odd neutrino Kaluza-Klein modes provide a realistic dark-matter candidate, with a mass of the order of 1 TeV, which will be probed by direct dark-matter detection experiments in the near future.
C1 [Carena, Marcela] Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA.
[Carena, Marcela; Shah, Nausheen R.; Wagner, Carlos E. M.] Univ Chicago, Enrico Fermi Inst, Dept Phys, Chicago, IL 60637 USA.
[Wagner, Carlos E. M.] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
[Medina, Anibal D.] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
[Wagner, Carlos E. M.] Argonne Natl Lab, HEP Div, Argonne, IL 60439 USA.
RP Carena, M (reprint author), Fermilab Natl Accelerator Lab, Dept Theoret Phys, POB 500, Batavia, IL 60510 USA.
OI Medina, Anibal/0000-0003-3662-4352
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SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 096010
DI 10.1103/PhysRevD.79.096010
PG 23
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800092
ER
PT J
AU Csaki, C
Heinonen, J
Hubisz, J
Shirman, Y
AF Csaki, Csaba
Heinonen, Johannes
Hubisz, Jay
Shirman, Yuri
TI Odd decays from even anomalies: Gauge mediation signatures without
supersymmetry
SO PHYSICAL REVIEW D
LA English
DT Article
ID PARTICLE PHYSICS; BREAKING; BOSON; AXION; MODEL; SPIN; LHC
AB We analyze the theory and phenomenology of anomalous global chiral symmetries in the presence of an extra dimension. We propose a simple extension of the standard model in 5D whose signatures closely resemble those of supersymmetry with gauge mediation, and we suggest a novel scalar dark matter candidate.
C1 [Csaki, Csaba; Heinonen, Johannes] Cornell Univ, Newman Lab Elementary Particle Phys, Inst High Energy Phenomenol, Ithaca, NY 14853 USA.
[Hubisz, Jay] Argonne Natl Lab, Argonne, IL 60439 USA.
[Hubisz, Jay] Syracuse Univ, Dept Phys, Syracuse, NY 13244 USA.
[Shirman, Yuri] Univ Calif Irvine, Dept Phys, Irvine, CA 92697 USA.
RP Csaki, C (reprint author), Cornell Univ, Newman Lab Elementary Particle Phys, Inst High Energy Phenomenol, Ithaca, NY 14853 USA.
EM csaki@cornell.edu; jh337@cornell.edu; jhubisz@physics.syr.edu;
yshirman@uci.edu
FU NSF [PHY-0355005, PHYa0653656]; DOE [DE-AC02-06CH11357]; Syracuse
University College of Arts and Sciences
FX We thank Jonathan Feng, Gero von Gersdorff, Mark Trodden, Itay Yavin,
and Kathryn Zurek for useful discussions and the Kavli Institute for
Theoretical Physics at Santa Barbara for their hospitality while this
work was initiated. We also thank Hsin-Chia Cheng for reading this
manuscript prior to submission and K. C. Kong for pointing out a mistake
in the relic density calculation in the first version of this paper. The
work of C. C. is supported in part by the NSF under Grant No.
PHY-0355005 and by a U.S.-Israeli BSF grant. J. He. was supported in
part by the NSF under Grant No. PHY-0355005. J. Hu. was supported at
Argonne National Laboratory under DOE Contract No. DE-AC02-06CH11357,
and by the Syracuse University College of Arts and Sciences. Y.S. was
supported in part by the NSF under Grant No. PHYa0653656.
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 10
AR 105016
DI 10.1103/PhysRevD.79.105016
PG 13
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WP
UT WOS:000266501900099
ER
PT J
AU Davoudiasl, H
Huber, P
AF Davoudiasl, Hooman
Huber, Patrick
TI Thermal production of axions in the Earth
SO PHYSICAL REVIEW D
LA English
DT Article
ID INVISIBLE AXION; CP CONSERVATION; CONSTRAINTS; MANTLE; CORE
AB We estimate the production rate of axion-type particles in the core of the Earth, at a temperature T approximate to 5000 K. We constrain thermal geo-axion emission by demanding a core-cooling rate less than O(100) K/Gyr, as suggested by geophysics. This yields a "nonstellar" (unaffected by extreme stellar temperatures or densities) bound on the axion-electron (ae) fine structure constant, alpha(ae)less than or similar to 10(-18), stronger than the existing accelerator (vacuum) bound by 4 orders of magnitude. We consider the prospects for measuring the geo-axion flux through conversion into photons in a geoscope; such measurements can further constrain alpha(ae).
C1 [Davoudiasl, Hooman] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
[Huber, Patrick] Virginia Tech, Dept Phys, IPNAS, Blacksburg, VA 24061 USA.
RP Davoudiasl, H (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
EM hooman@bnl.gov; pahuber@vt.edu
FU U. S. Department of Energy [DE-AC02-98CH10886]
FX We would like to thank G. Khodaparast, S. King, and Y. Semertzidis for
useful discussions. The work of H. D. is supported in part by the U. S.
Department of Energy underContract No. DE-AC02-98CH10886.
NR 33
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SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 095024
DI 10.1103/PhysRevD.79.095024
PG 5
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800081
ER
PT J
AU Dawson, S
Yan, WB
AF Dawson, Sally
Yan, Wenbin
TI Hiding the Higgs boson with multiple scalars
SO PHYSICAL REVIEW D
LA English
DT Article
ID STANDARD MODEL; RADIATIVE-CORRECTIONS; ONE-LOOP; PHYSICS
AB We consider models with multiple Higgs scalar gauge singlets and the resulting restrictions on the parameters from precision electroweak measurements. In these models, the scalar singlets mix with the SU(2)(L) Higgs doublet, potentially leading to reduced couplings of the scalars to fermions and gauge bosons relative to the standard model Higgs boson couplings. Such models can make the Higgs sector difficult to explore at the LHC. We emphasize the new physics resulting from the addition of at least two scalar Higgs singlets.
C1 [Dawson, Sally] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
[Yan, Wenbin] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
RP Dawson, S (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
EM dawson@bnl.gov; wenbin.yan@stonybrook.edu
OI Dawson, Sally/0000-0002-5598-695X
FU U.S. Department of Energy [DE-AC02-98CH10886]
FX The work of S. D. is supported by the U.S. Department of Energy under
Grant No. DE-AC02-98CH10886.
NR 32
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SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 095002
DI 10.1103/PhysRevD.79.095002
PG 7
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800059
ER
PT J
AU Deka, M
Streuer, T
Doi, T
Dong, SJ
Draper, T
Liu, KF
Mathur, N
Thomas, AW
AF Deka, M.
Streuer, T.
Doi, T.
Dong, S. J.
Draper, T.
Liu, K. F.
Mathur, N.
Thomas, A. W.
TI Moments of nucleon's parton distribution for the sea and valence quarks
from lattice QCD
SO PHYSICAL REVIEW D
LA English
DT Article
ID CHIRAL PERTURBATION-THEORY; DEEP-INELASTIC SCATTERING; FORM-FACTOR;
WILSON FERMIONS; ANTIQUARK ASYMMETRY; SYMMETRY-BREAKING;
MATRIX-ELEMENTS; STRANGE SEA; OPERATORS; REPRESENTATIONS
AB We extend the study of lowest moments, < x > and < x(2)>, of the parton distribution function of the nucleon to include those of the sea quarks; this entails a disconnected insertion calculation in lattice QCD. This is carried out on a 16(3) x 24 quenched lattice with Wilson fermion. The quark loops are calculated with Z(2) noise vectors and unbiased subtractions, and multiple nucleon sources are employed to reduce the statistical errors. We obtain 5 sigma signals for < x > for the u, d, and s quarks, but < x(2)> i is consistent with zero within errors. We provide results for both the connected and disconnected insertions. The perturbatively renormalized < x > for the strange quark at mu = 2 GeV is < x >(s+(s) over bar) = 0.027 +/- 0.006 which is consistent with the experimental result. The ratio of < x > for s vs u/d in the disconnected insertion with quark loops is calculated to be 0.88 +/- 0.07. This is about twice as large as the phenomenologically fitted < x >(s+($) over bar)/< x >((u) over bar)+< x >((d) over bar) from experiments where (u) over bar and (d) over bar include both the connected and disconnected insertion parts. We discuss the source and implication of this difference.
C1 [Deka, M.; Doi, T.; Dong, S. J.; Draper, T.; Liu, K. F.] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
[Streuer, T.] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany.
[Mathur, N.] Tata Inst Fundamental Res, Dept Theoret Phys, Mumbai 40005, Maharashtra, India.
[Thomas, A. W.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
RP Deka, M (reprint author), Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
EM mpdeka@pa.uky.edu
RI Thomas, Anthony/G-4194-2012
OI Thomas, Anthony/0000-0003-0026-499X
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 094502
DI 10.1103/PhysRevD.79.094502
PG 32
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800051
ER
PT J
AU Detmold, W
Tiburzi, BC
Walker-Loud, A
AF Detmold, W.
Tiburzi, B. C.
Walker-Loud, A.
TI Extracting electric polarizabilities from lattice QCD
SO PHYSICAL REVIEW D
LA English
DT Article
ID MAGNETIC-FIELDS; MASSES; LOOPS
AB Charged and neutral, pion and kaon electric polarizabilities are extracted from lattice QCD using an ensemble of anisotropic gauge configurations with dynamical clover fermions. We utilize classical background fields to access the polarizabilities from two-point correlation functions. Uniform background fields are achieved by quantizing the electric field strength with the proper treatment of boundary flux. These external fields, however, are implemented only in the valence quark sector. A novel method to extract charge particle polarizabilities is successfully demonstrated for the first time.
C1 [Detmold, W.; Walker-Loud, A.] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA.
[Detmold, W.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
[Tiburzi, B. C.] Univ Maryland, Dept Phys, Maryland Ctr Fundamental Phys, College Pk, MD 20742 USA.
RP Detmold, W (reprint author), Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA.
EM wdetmold@wm.edu; bctiburz@umd.edu; walkloud@wm.edu
OI Tiburzi, Brian/0000-0001-8696-2902; Detmold, William/0000-0002-0400-8363
FU U.S. Department of Energy [DE-AC05-06OR-23177, DE-FG02-93ER-40762,
DE-FG0207ER-41527]; Jefferson Science Associates, LLC
FX These calculations were performed using the CHROMA software suite [36]
on the computing clusters at Jefferson Laboratory. Time on the clusters
was awarded through the USQCD collaboration, and made possible by the
SciDAC Initiative. This work is supported in part by Jefferson Science
Associates, LLC under U. S. Department of Energy contract No.
DE-AC05-06OR-23177 (W. D.). Additional support provided by the U.S.
Department of Energy, under Grants No. DE-FG02-04ER-41302 (W. D.), No.
DE-FG02-93ER-40762 (B. C. T.), and No. DE-FG0207ER-41527 (A. W.-L.).
NR 36
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 094505
DI 10.1103/PhysRevD.79.094505
PG 12
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800054
ER
PT J
AU Dudek, JJ
Edwards, RG
Thomas, CE
AF Dudek, Jozef J.
Edwards, Robert G.
Thomas, Christopher E.
TI Exotic and excited-state radiative transitions in charmonium from
lattice QCD
SO PHYSICAL REVIEW D
LA English
DT Article
ID MODEL; DECAYS; J/PSI
AB We compute, for the first time using lattice QCD methods, charmonium radiative transition rates involving states of high spin and exotics. Utilizing a large basis of interpolating fields we are able to project out various excited-state contributions to three-point correlators computed on quenched anisotropic lattices. In the first lattice QCD calculation of the exotic 1(-+) eta(c1) radiative decay, we find a large partial width Gamma(eta(c1) -> J/psi gamma) similar to 100 keV. We find clear signals for electric dipole and magnetic quadrupole transition form factors in chi(c2) -> J/psi gamma, calculated for the first time in this framework, and study transitions involving excited psi and chi(c1,2) states. We calculate hindered magnetic dipole transition widths without the sensitivity to assumptions made in model studies and find statistically significant signals, including a nonexotic vector hybrid candidate Y(hyb?) -> eta(c)gamma. As well as comparison to experimental data, we discuss in some detail the phenomenology suggested by our results and the extent to which it mirrors that of quark-potential models, and make suggestions for the interpretation of our results involving exotic quantum numbered states.
C1 [Dudek, Jozef J.; Edwards, Robert G.; Thomas, Christopher E.] Jefferson Lab, Newport News, VA 23606 USA.
[Dudek, Jozef J.] Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
RP Dudek, JJ (reprint author), Jefferson Lab, 12000 Jefferson Ave, Newport News, VA 23606 USA.
EM dudek@jlab.org
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 094504
DI 10.1103/PhysRevD.79.094504
PG 19
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800053
ER
PT J
AU El-Bennich, B
Furman, A
Kaminski, R
Lesniak, L
Loiseau, B
Moussallam, B
AF El-Bennich, B.
Furman, A.
Kaminski, R.
Lesniak, L.
Loiseau, B.
Moussallam, B.
TI CP violation and kaon-pion interactions in B -> K pi(+)pi(-) decays
SO PHYSICAL REVIEW D
LA English
DT Article
ID CHIRAL PERTURBATION-THEORY; LOW-ENERGY EXPANSION; FORM-FACTORS; 11
GEV/C; QCD FACTORIZATION; K SCATTERING; SUM-RULES; SYMMETRY; LATTICE;
BOSON
AB We study CP violation and the contribution of the strong kaon-pion interactions in the three-body B -> K pi(+)pi(-) decays. We extend our recent work on the effect of the two-pion S- and P-wave interactions to that of the corresponding kaon-pion ones. The weak amplitudes have a first term derived in QCD factorization and a second one as a phenomenological contribution added to the QCD penguin amplitudes. The effective QCD coefficients include the leading order contributions plus next-to-leading order vertex and penguins corrections. The matrix elements of the transition to the vacuum of the kaon-pion pairs, appearing naturally in the factorization formulation, are described by the strange K pi scalar (S-wave) and vector (P-wave) form factors. These are determined from Muskhelishvili-Omnes coupled channel equations using experimental kaon-pion T-matrix elements, together with chiral symmetry and asymptotic QCD constraints. From the scalar form factor study, the modulus of the K-0*(1430)decay constant is found to be (32 +/- 5) MeV. The additional phenomenological amplitudes are fitted to reproduce the K pi effective mass and helicity angle distributions, the B -> K*(892)pi branching ratios and the CP asymmetries of the recent data from Belle and BABAR collaborations. We use also the new measurement by the BABAR group of the phase difference between the B-0 and (B) over bar (0) decay amplitudes to K*(892)pi. Our predicted B-+/- -> K-0*(1430)pi(+/-), K-0*(1430) -> K-+/-pi(-/+) branching fraction, equal to (11.6 +/- 0.6) x 10(-6), is smaller than the result of the analyzes of both collaborations. For the neutral B0 decays, the predicted value is (11.1 +/- 0.5) x 10(-6). In order to reduce the large systematic uncertainties in the experimental determination of the B -> K-0*(1430)pi branching fractions, a new parametrization is proposed. It is based on the K pi scalar form factor, well constrained by theory and experiments other than those of B decays.
C1 [El-Bennich, B.; Loiseau, B.] Univ Paris 06, Lab Phys Nucl & Hautes Energies, CNRS, IN2P3,Grp Theorie, F-75252 Paris, France.
[El-Bennich, B.; Loiseau, B.] Univ Paris 07, Lab Phys Nucl & Hautes Energies, CNRS, IN2P3,Grp Theorie, F-75252 Paris, France.
[El-Bennich, B.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
[Kaminski, R.; Lesniak, L.] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Div Theoret Phys, PL-31342 Krakow, Poland.
[Moussallam, B.] Univ Paris 11, Inst Phys Nucl, CNRS, Grp Phys Theor,IN2P3, F-91406 Orsay, France.
RP El-Bennich, B (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
NR 82
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 094005
DI 10.1103/PhysRevD.79.094005
PG 28
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800024
ER
PT J
AU Gelis, F
Lappi, T
Venugopalan, R
AF Gelis, Francois
Lappi, Tuomas
Venugopalan, Raju
TI High energy factorization in nucleus-nucleus collisions. III. Long range
rapidity correlations
SO PHYSICAL REVIEW D
LA English
DT Article
ID COLOR GLASS CONDENSATE; GLUON DISTRIBUTION-FUNCTIONS;
RENORMALIZATION-GROUP; TRANSVERSE-MOMENTUM; PERTURBATIVE QCD; SMALL-X;
EVOLUTION; EQUATION; FEATURES; POMERON
AB We obtain a novel result in QCD for long range rapidity correlations between gluons produced in the collision of saturated high energy hadrons or nuclei. This result, obtained in a high energy factorization framework, provides strong justification for the Glasma flux tube picture of coherent strong color fields. Our formalism can be applied to "near side ridge'' events at the Relativistic Heavy Ion Collider and in future studies of long range rapidity correlations at the LHC.
C1 [Gelis, Francois] CERN, PH TH, Div Theory, CH-1211 Geneva 23, Switzerland.
[Gelis, Francois; Lappi, Tuomas] CEA Saclay, DSM,URA 2306, CNRS, Inst Phys Theor, F-91191 Gif Sur Yvette, France.
[Venugopalan, Raju] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Gelis, F (reprint author), CERN, PH TH, Div Theory, Case C01600, CH-1211 Geneva 23, Switzerland.
FU U. S. Department of Energy [DE-AC02-98CH10886]; Agence Nationale de la
Recherche via the programme [ANR-06-BLAN-0285-01]
FX We thank the Center for Theoretical Sciences of the Tata Institute for
Fundamental Research for their support during the program "Initial
Conditions in Heavy Ion Collisions.'' R.V.'s research is supported by
the U. S. Department of Energy under DOE Contract No. DE-AC02-98CH10886.
F.G.' s work is supported in part by Agence Nationale de la Recherche
via the programme ANR-06-BLAN-0285-01.
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SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 094017
DI 10.1103/PhysRevD.79.094017
PG 7
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800036
ER
PT J
AU Harnik, R
Kribs, GD
AF Harnik, Roni
Kribs, Graham D.
TI Effective theory of Dirac dark matter
SO PHYSICAL REVIEW D
LA English
DT Article
ID COSMIC-RAY ELECTRONS; EARLY UNIVERSE; POSITRONS; ENERGY; SUPERSYMMETRY;
SPECTRA; MASS
AB A stable Dirac fermion with four-fermion interactions to leptons suppressed by a scale Lambda similar to 1 TeV is shown to provide a viable candidate for dark matter. The thermal relic abundance matches cosmology, while nuclear recoil direct detection bounds are automatically avoided in the absence of (large) couplings to quarks. The annihilation cross section in the early Universe is the same as the annihilation in our Galactic neighborhood. This allows Dirac fermion dark matter to naturally explain the positron ratio excess observed by PAMELA with a minimal boost factor, given present astrophysical uncertainties. We use the GALPROP program for propagation of signal and background; we discuss in detail the uncertainties resulting from the propagation parameters and, more importantly, the injected spectra. Fermi/GLAST has an opportunity to see a feature in the gamma-ray spectrum at the mass of the Dirac fermion. The excess observed by ATIC/PPB-BETS may also be explained with Dirac dark matter that is heavy. A super-symmetric model with a Dirac bino provides a viable UV model of the effective theory. The dominance of the leptonic operators, and thus the observation of an excess in positrons and not in antiprotons, is naturally explained by the large hypercharge and low mass of sleptons as compared with squarks. Minimizing the boost factor implies the right- handed selectron is the lightest slepton, which is characteristic of our model. Selectrons (or sleptons) with mass less than a few hundred GeV are an inescapable consequence awaiting discovery at the LHC.
C1 [Harnik, Roni] Stanford Univ, Dept Phys, SITP, Stanford, CA 94305 USA.
[Kribs, Graham D.] Univ Oregon, Dept Phys, Eugene, OR 97403 USA.
[Kribs, Graham D.] Univ Oregon, Inst Theoret Sci, Eugene, OR 97403 USA.
[Harnik, Roni] Stanford Univ, SLAC, Menlo Pk, CA 94025 USA.
RP Harnik, R (reprint author), Stanford Univ, Dept Phys, SITP, Stanford, CA 94305 USA.
FU Department of Energy [DE-AC02-76SF00515, DE-FG02-96ER40969]
FX The authors thank I. Moskalenko and A. Strong for help in understanding
the physics and output of their GALPROP program; J. Schombert for
teaching us how to read FITS files; and N. Weiner for useful discussions
at an early stage in the project. The authors also thank the Aspen
Center for Physics where this work was initiated. This work was
supported in part by the Department of Energy under Grant Nos.
DE-AC02-76SF00515 (R.H.) and DE-FG02-96ER40969 (G.D.K.).
NR 76
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PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 095007
DI 10.1103/PhysRevD.79.095007
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800064
ER
PT J
AU Hooper, D
Zurek, KM
AF Hooper, Dan
Zurek, Kathryn M.
TI PAMELA and ATIC signals from Kaluza-Klein dark matter
SO PHYSICAL REVIEW D
LA English
DT Article
ID RAY POSITRON FRACTION; ELECTRONS; ENERGIES
AB We study the possibility that Kaluza-Klein dark matter in a model with one universal extra dimension is responsible for the recent observations of the PAMELA and ATIC experiments. In this model, the dark matter particles annihilate largely to charged leptons, which enables them to produce a spectrum of cosmic ray electrons and positrons consistent with the PAMELA and ATIC measurements. To normalize to the observed signal, however, large boost factors (similar to 10(3)) are required. Despite these large boost factors and significant annihilation to hadronic modes (35%), we find that the constraints from cosmic ray antiproton measurements can be satisfied. Relic abundance considerations in this model force us to consider a rather specific range of masses (approximately 600-900 GeV) which is very similar to the range required to generate the ATIC spectral feature. The results presented here can also be used as a benchmark for model-independent constraints on dark matter annihilation to hadronic modes.
C1 [Hooper, Dan; Zurek, Kathryn M.] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
[Hooper, Dan] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
[Zurek, Kathryn M.] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
RP Hooper, D (reprint author), Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, POB 500, Batavia, IL 60510 USA.
FU U. S. Department of Energy [DE-FG02-95ER40896]; NASA [NAG5-10842]
FX We would like to thank Joakim Edsjo for his help with DARKSUSY. This
work has been supported by the U. S. Department of Energy Grant No.
DE-FG02-95ER40896 and by NASA Grant No. NAG5-10842.
NR 44
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 10
AR 103529
DI 10.1103/PhysRevD.79.103529
PG 5
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WP
UT WOS:000266501900049
ER
PT J
AU Hooper, D
Stebbins, A
Zurek, KM
AF Hooper, Dan
Stebbins, Albert
Zurek, Kathryn M.
TI Excesses in cosmic ray positron and electron spectra from a nearby clump
of neutralino dark matter
SO PHYSICAL REVIEW D
LA English
DT Article
ID EGRET OBSERVATIONS; EMISSION
AB In this letter, we suggest that a nearby clump of 600-1000 GeV neutralinos may be responsible for the excesses recently observed in the cosmic ray positron and electron spectra by the PAMELA and ATIC experiments. Although neutralino dark matter annihilating throughout the halo of the Milky Way is predicted to produce a softer spectrum than is observed, and violate constraints from cosmic ray antiproton measurements, a large nearby (within 1-2 kiloparsecs of the Solar System) clump of annihilating neutralinos can lead to a spectrum which is consistent with PAMELA and ATIC, while also producing an acceptable antiproton flux. Furthermore, the presence of a large dark matter clump can potentially accommodate the very large annihilation rate required to produce the PAMELA and ATIC signals. We estimate the probability of a sufficiently large clump being present to be similar to 10(-3) or less.
C1 [Hooper, Dan; Stebbins, Albert; Zurek, Kathryn M.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Hooper, Dan] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
RP Hooper, D (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA.
FU US Department of Energy [DE-FG02-95ER40896]; NASA [NAG5-10842]
FX This work has been supported by the US Department of Energy, including
grant DE-FG02-95ER40896, and by NASA grant NAG5-10842.
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SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 10
AR 103513
DI 10.1103/PhysRevD.79.103513
PG 5
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WP
UT WOS:000266501900033
ER
PT J
AU Ibe, M
Murayama, H
Yanagida, TT
AF Ibe, Masahiro
Murayama, Hitoshi
Yanagida, T. T.
TI Breit-Wigner enhancement of dark matter annihilation
SO PHYSICAL REVIEW D
LA English
DT Article
ID ABUNDANCES; ENERGIES
AB We point out that annihilation of dark matter in the galactic halo can be enhanced relative to that in the early Universe due to a Breit-Wigner tail, if the dark matter annihilates through a pole just below the threshold. This provides a new explanation to the "boost factor" which is suggested by the recent data of the PAMELA, ATIC and PPB-BETS cosmic ray experiments.
C1 [Ibe, Masahiro] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA.
[Murayama, Hitoshi; Yanagida, T. T.] Univ Tokyo, Inst Phys & Math Universe, Kashiwa, Chiba 2778568, Japan.
[Murayama, Hitoshi] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Murayama, Hitoshi] Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA.
[Yanagida, T. T.] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan.
RP Ibe, M (reprint author), SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA.
RI Yanagida, Tsutomu/A-4394-2011; Murayama, Hitoshi/A-4286-2011
FU U. S. Department of Energy [DE-AC02-76SF00515]; MEXT, Japan; U.S. DOE
[DE-AC03-76SF00098]; NSF [PHY-04-57315]
FX The work of M. I. was supported by the U.S. Department of Energy under
Contract No. DE-AC02-76SF00515. The work of H. M. and T. T. Y. was
supported in part by World Premier International Research Center
Initiative (WPI Initiative), MEXT, Japan. The work of H. M. was also
supported in part by the U.S. DOE under Contract No. DE-AC03-76SF00098,
and in part by the NSF under Grant No. PHY-04-57315.
NR 15
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 095009
DI 10.1103/PhysRevD.79.095009
PG 5
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800066
ER
PT J
AU Martin, SP
AF Martin, Stephen P.
TI Nonuniversal gaugino masses from nonsinglet F-terms in nonminimal
unified models
SO PHYSICAL REVIEW D
LA English
DT Article
ID GRAND-UNIFICATION; SUPERSYMMETRIC SU(5); PROTON-DECAY; SCALE; GUTS;
PREDICTIONS; NATURALNESS; SPECTRUM; SO(10)
AB In phenomenological studies of low-energy supersymmetry, running gaugino masses are often taken to be equal near the scale of apparent gauge coupling unification. However, many known mechanisms can avoid this universality, even in models with unified gauge interactions. One example is an F-term vacuum expectation value that is a singlet under the standard model gauge group but transforms nontrivially in the symmetric product of two adjoint representations of a group that contains the standard model gauge group. Here, I compute the ratios of gaugino masses that follow from F-terms in nonsinglet representations of SO(10) and E(6) and their subgroups, extending well-known results for SU(5). The SO(10) results correct some long-standing errors in the literature.
C1 [Martin, Stephen P.] No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
[Martin, Stephen P.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Martin, SP (reprint author), No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
FU National Science Foundation [PHY-0757325]
FX This work was supported in part by National Science Foundation Grant No.
PHY-0757325.
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 095019
DI 10.1103/PhysRevD.79.095019
PG 7
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800076
ER
PT J
AU Quigg, C
Shrock, R
AF Quigg, Chris
Shrock, Robert
TI Gedanken worlds without Higgs fields: QCD-induced electroweak symmetry
breaking
SO PHYSICAL REVIEW D
LA English
DT Review
ID CHIRAL PERTURBATION-THEORY; PROTON MASS DIFFERENCE; MODEL PADE
CALCULATION; REAL SCALAR FIELD; WEAK INTERACTIONS; STANDARD MODEL;
SIGMA-MODEL; BOSON MASS; BROKEN SYMMETRIES; TECHNICOLOR THEORIES
AB To illuminate how electroweak symmetry breaking shapes the physical world, we investigate toy models in which no Higgs fields or other constructs are introduced to induce spontaneous symmetry breaking. Two models incorporate the standard SU(3)(c)circle times SU(2)(L)circle times U(1)(Y) gauge symmetry and fermion content similar to that of the standard model. The first class-like the standard electroweak theory-contains no bare mass terms, so the spontaneous breaking of chiral symmetry within quantum chromodynamics is the only source of electroweak symmetry breaking. The second class adds bare fermion masses sufficiently small that QCD remains the dominant source of electroweak symmetry breaking and the model can serve as a well-behaved low-energy effective field theory to energies somewhat above the hadronic scale. A third class of models is based on the left-right-symmetric SU(3)(c)circle times SU(2)(L)circle times SU(2)(R)circle times U(1) gauge group. In a fourth class of models, built on SU(4)(PS)circle times SU(2)(L)circle times SU(2)(R) gauge symmetry, the lepton number is treated as a fourth color and the color gauge group is enlarged to the SU(4)(PS) of Pati and Salam (PS). Many interesting characteristics of the models stem from the fact that the effective strength of the weak interactions is much closer to that of the residual strong interactions than in the real world. The Higgs-free models not only provide informative contrasts to the real world, but also lead us to consider intriguing issues in the application of field theory to the real world.
C1 [Quigg, Chris] Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA.
[Quigg, Chris] Univ Karlsruhe, Inst Theoret Teilchenphys, D-76128 Karlsruhe, Germany.
[Shrock, Robert] SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA.
RP Quigg, C (reprint author), Fermilab Natl Accelerator Lab, Dept Theoret Phys, POB 500, Batavia, IL 60510 USA.
NR 140
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SN 1550-7998
EI 1550-2368
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 096002
DI 10.1103/PhysRevD.79.096002
PG 20
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800084
ER
PT J
AU Shifman, M
Unsal, M
AF Shifman, M.
Unsal, Mithat
TI Yang-Mills theories with chiral matter at strong coupling
SO PHYSICAL REVIEW D
LA English
DT Article
ID LARGE-N EXPANSION; FIELD-THEORIES; GAUGE-THEORIES; LATTICE; CONDENSATE;
SYMMETRY; MODEL
AB Strong coupling dynamics of Yang-Mills theories with chiral fermion content remained largely elusive despite much effort over the years. In this work, we propose a dynamical framework in which we can address nonperturbative properties of chiral, nonsupersymmetric gauge theories, in particular, chiral quiver theories on S(1)xR(3). Double-trace deformations are used to stabilize the center-symmetric vacuum. This allows one to smoothly connect small-r(S(1)) to large-r(S(1)) physics (R(4) is the limiting case) where the double-trace deformations are switched off. In particular, the occurrence of the mass gap in the gauge sector and linear confinement due to bions are analytically demonstrated. We find the pattern of the chiral symmetry realization which depends on the structure of the monopole-ring operators, a novel class of topological excitations. The deformed chiral theory, unlike the undeformed one, satisfies volume independence down to arbitrarily small volumes (a working Eguchi-Kawai reduction) in the large N limit. This equivalence may open new perspectives on strong coupling chiral gauge theories on R(4).
C1 [Shifman, M.] Univ Minnesota, William I Fine Theoret Phys Inst, Minneapolis, MN 55455 USA.
[Shifman, M.] Univ Paris 11, Phys Theor Lab, CNRS, Unite Mixte Rech,UMR 8627, F-91405 Orsay, France.
[Unsal, Mithat] Stanford Univ, SLAC, Menlo Pk, CA 94025 USA.
[Unsal, Mithat] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
RP Shifman, M (reprint author), Univ Minnesota, William I Fine Theoret Phys Inst, Minneapolis, MN 55455 USA.
FU DOE [DE-FG02-94ER40823]; Chaire Internationalle de Recherche Blaise
Pascal de l'Etat et de la Regoin d'Ille-de-France, geree par la
Fondation de l'Ecole Normale Superieure; U.S. Department of Energy
[DE-AC02-76SF00515]
FX We thank E. Poppitz for sharing with us his unpublished notes on chiral
determinants, and useful remarks on the paper. M. S. is grateful to G.
Korchemsky and A. Vainshtein for discussions. M. U. thanks S.
Dimopoulos, M. Peskin, E. Poppitz, and M. Golterman for illuminating
conversations about chiral gauge theories. We thank the Galileo Galilei
Institute for Theoretical Physics in Florence for their hospitality and
INFN for partial support at the final stages of this work. The work of
M. S. is supported in part by DOE Grant No. DE-FG02-94ER40823 and by
Chaire Internationalle de Recherche Blaise Pascal de l'Etat et de la
Regoin d'Ille-de-France, geree par la Fondation de l'Ecole Normale
Superieure. The work of M. U. is supported by the U.S. Department of
Energy Grant No. DE-AC02-76SF00515.
NR 43
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PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 10
AR 105010
DI 10.1103/PhysRevD.79.105010
PG 19
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WP
UT WOS:000266501900093
ER
PT J
AU Smith, CJ
Fuller, GM
Smith, MS
AF Smith, Christel J.
Fuller, George M.
Smith, Michael S.
TI Big bang nucleosynthesis with independent neutrino distribution
functions
SO PHYSICAL REVIEW D
LA English
DT Article
ID WEAK-INTERACTION RATES; INTERMEDIATE-MASS NUCLEI; PROBE WMAP
OBSERVATIONS; DECAYING DARK-MATTER; PRIMORDIAL NUCLEOSYNTHESIS; STERILE
NEUTRINOS; EARLY UNIVERSE; X-RAY; TAU-NEUTRINOS; OSCILLATIONS
AB We have performed new big bang nucleosynthesis calculations, which employ arbitrarily specified, time-dependent neutrino and antineutrino distribution functions for each of up to four neutrino flavors. We self-consistently couple these distributions to the thermodynamics, the expansion rate, and scale factor-time/temperature relationship, as well as to all relevant weak, electromagnetic, and strong nuclear reaction processes in the early Universe. With this approach, we can treat any scenario in which neutrino or antineutrino spectral distortion might arise. These scenarios might include, for example, decaying particles, active-sterile neutrino oscillations, and active-active neutrino oscillations in the presence of significant lepton numbers. Our calculations allow lepton numbers and sterile neutrinos to be constrained with observationally determined primordial helium and deuterium abundances. We have modified a standard big bang nucleosynthesis code to perform these calculations and have made it available to the community.
C1 [Smith, Christel J.; Fuller, George M.] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
[Smith, Michael S.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RP Smith, CJ (reprint author), Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
FU U.S. DOE [DE-AC05-00OR22725]; NSF [PHY-0653626]; UC/LANL CARE grant at
UCSD
FX We would like to acknowledge discussions with Chad Kishimoto and Kevork
Abazajian. ORNL is managed by UT-Battelle, LLC, for the U.S. DOE under
Contract No. DE-AC05-00OR22725. The work of G. M. F. and C. J. S. was
supported in part by NSF Grant No. PHY-0653626 and a UC/LANL CARE grant
at UCSD.
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U2 3
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 10
AR 105001
DI 10.1103/PhysRevD.79.105001
PG 10
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WP
UT WOS:000266501900084
ER
PT J
AU Vogelsang, W
Yuan, F
AF Vogelsang, Werner
Yuan, Feng
TI Next-to-leading order calculation of the single transverse spin
asymmetry in the Drell-Yan process
SO PHYSICAL REVIEW D
LA English
DT Article
ID DEEP-INELASTIC SCATTERING; FINAL-STATE INTERACTIONS; STRUCTURE-FUNCTION
G2(X; PARTON DISTRIBUTIONS; QUANTUM CHROMODYNAMICS; HADRONIC SCATTERING;
EVOLUTION-EQUATIONS; POLARIZED NUCLEON; POWER CORRECTIONS; HIGHER-TWIST
AB We calculate the next-to-leading order perturbative QCD corrections to the transverse momentum weighted single transverse spin asymmetry in Drell-Yan lepton pair production in hadronic collisions. We identify the splitting function relevant for the scale evolution of the twist-three quark-gluon correlation function. We comment on the consequences of our results for phenomenology.
C1 [Vogelsang, Werner] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
[Yuan, Feng] Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
[Yuan, Feng] Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA.
RP Vogelsang, W (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
EM vogelsan@quark.phy.bnl.gov; fyuan@quark.phy.bnl.gov
RI Yuan, Feng/N-4175-2013
FU U.S. Department of Energy [DE-AC0205CH11231, DE-AC02-98CH10886]; RIKEN,
Brookhaven National Laboratory
FX We thank Zhongbo Kang, Jianwei Qiu, and Jian Zhou for useful comments
and valuable discussions. W. V. is grateful to V. Braun, M. Diehl, and
D. Muller for useful discussions. This work was supported in part by the
U.S. Department of Energy under grant Contract No. DE-AC0205CH11231. F.
Y. and W. V. thank RIKEN, Brookhaven National Laboratory and the U. S.
Department of Energy (Contract No. DE-AC02-98CH10886) for providing the
facilities essential for the completion of their work.
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 094010
DI 10.1103/PhysRevD.79.094010
PG 10
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800029
ER
PT J
AU Wang, P
Leinweber, DB
Thomas, AW
Young, RD
AF Wang, P.
Leinweber, D. B.
Thomas, A. W.
Young, R. D.
TI Chiral extrapolation of octet-baryon charge radii
SO PHYSICAL REVIEW D
LA English
DT Article
ID ELECTROMAGNETIC FORM-FACTORS; PERTURBATION-THEORY; QUARK-MODEL; NUCLEON;
LATTICE; CONVERGENCE; COVARIANT; SYMMETRY
AB The charge radii of octet-baryons obtained in quenched lattice-QCD calculations are extrapolated within heavy-baryon chiral perturbation theory. Finite-range regularization is applied to improve the convergence of the chiral expansion and to provide estimates of quenching artifacts. Lattice values of quark distribution radii and baryon charge radii for m(pi)(2) in the range (0.1,0.7) GeV2 are described very well with finite-range regularization. Upon estimating corrections for both finite-volume and quenching effects, the obtained charge radii of the proton, neutron and Sigma(-) are in good agreement with experimental measurements. The predicted charge radii of the remaining octet-baryons have not yet been measured and present a challenge to future experiments.
C1 [Wang, P.; Thomas, A. W.] Jefferson Lab, Newport News, VA 23606 USA.
[Leinweber, D. B.] Univ Adelaide, Special Res Ctr Subatom Struct Matter CSSM, Adelaide, SA 5005, Australia.
[Leinweber, D. B.] Univ Adelaide, Dept Phys, Adelaide, SA 5005, Australia.
[Thomas, A. W.] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA.
[Young, R. D.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RP Wang, P (reprint author), Jefferson Lab, 12000 Jefferson Ave, Newport News, VA 23606 USA.
RI Thomas, Anthony/G-4194-2012; Young, Ross/H-8207-2012; Leinweber,
Derek/J-6705-2013
OI Thomas, Anthony/0000-0003-0026-499X; Leinweber,
Derek/0000-0002-4745-6027
FU Australian Partnership for Advanced Computing (APAC); eResearch South
Australia for supercomputer; Australian Research Council; U.S. DOE
[DE-AC05-06OR23177]
FX We thank the Australian Partnership for Advanced Computing (APAC) and
eResearch South Australia for supercomputer support enabling this
project. This work is supported by the Australian Research Council and
by U.S. DOE Contract No. DE-AC05-06OR23177, under which Jefferson
Science Associates, LLC operates Jefferson Laboratory, and Contract No.
DE-AC02-06CH11357, under which UChicago Argonne, LLC operates Argonne
National Laboratory.
NR 53
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 094001
DI 10.1103/PhysRevD.79.094001
PG 12
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800020
ER
PT J
AU Yamazaki, T
AF Yamazaki, Takeshi
TI On-shell Delta I=3/2 kaon weak matrix elements with nonzero total
momentum
SO PHYSICAL REVIEW D
LA English
DT Article
ID CHIRAL PERTURBATION-THEORY; PION-SCATTERING LENGTH; QUANTUM-FIELD
THEORIES; TO-LEADING ORDER; LATTICE CALCULATION; ANISOTROPIC LATTICES;
FINAL-STATE; ONE-LOOP; FERMIONS; DECAYS
AB We present our results for the on-shell Delta I=3/2 kaon decay matrix elements using domain wall fermions and the DBW2 gauge action at one coarse lattice spacing corresponding to a(-1)=1.31 GeV in the quenched approximation. The on-shell matrix elements are evaluated in two different frames: the center-of-mass frame and nonzero total-momentum frame. We employ the formula proposed by Lellouch and Luscher in the center-of-mass frame, and its extension for a nonzero total-momentum frame to extract the infinite volume, on-shell, center- of-mass frame decay amplitudes. We determine the decay amplitude at the physical pion mass and momentum from the chiral extrapolation and an interpolation of the relative momentum using the results calculated in the two frames. We have obtained ReA(2) = 1.66(23)((+48)(-03)) x ((+53)(-0)) x 10(-8) GeV and ImA(2) = -1.181(26)((+141)(-014)) ((+44)(-0)) x 10(-12) GeV at the physical point, using the data at the relatively large pion mass, m(pi) > 0.35 GeV. The first error is statistic, and the second and third are systematic. The second error is estimated with several fits of the chiral extrapolation including the (quenched) chiral perturbation formula at next to leading order using only lighter pion masses. The third one is estimated with an analysis using the lattice dispersion relation. The result of ReA(2) is reasonably consistent with experiment.
C1 [Yamazaki, Takeshi] Univ Connecticut, Dept Phys, Storrs, CT 06269 USA.
[Yamazaki, Takeshi] Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA.
RP Yamazaki, T (reprint author), Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan.
NR 70
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U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAY
PY 2009
VL 79
IS 9
AR 094506
DI 10.1103/PhysRevD.79.094506
PG 24
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 451WO
UT WOS:000266501800055
ER
PT J
AU Daligault, J
Dimonte, G
AF Daligault, Jerome
Dimonte, Guy
TI Correlation effects on the temperature-relaxation rates in dense plasmas
SO PHYSICAL REVIEW E
LA English
DT Article
DE hydrogen; molecular dynamics method; plasma density; plasma
interactions; plasma temperature
ID CONDUCTIVITIES; HYDROGEN; LIQUIDS; STATE
AB We present a model for the rate of temperature relaxation between electrons and ions in plasmas. The model includes self-consistently the effects of particle screening, electron degeneracy, and correlations between electrons and ions. We successfully validate the model over a wide range of plasma coupling against molecular-dynamics simulations of classical plasmas of like-charged electrons and ions. We present calculations of the relaxation rates in dense hydrogen and show that, while electron-ion correlation effects are indispensable in classical, like-charged plasmas at any density and temperature, quantum diffraction effects prevail over electron-ion correlation effects in dense hydrogen plasmas.
C1 [Daligault, Jerome; Dimonte, Guy] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Daligault, J (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM daligaul@lanl.gov
NR 30
TC 29
Z9 29
U1 0
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1539-3755
J9 PHYS REV E
JI Phys. Rev. E
PD MAY
PY 2009
VL 79
IS 5
AR 056403
DI 10.1103/PhysRevE.79.056403
PG 14
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 451WE
UT WOS:000266500800064
PM 19518572
ER
PT J
AU Lane, JMD
Ismail, AE
Chandross, M
Lorenz, CD
Grest, GS
AF Lane, J. Matthew D.
Ismail, Ahmed E.
Chandross, Michael
Lorenz, Christian D.
Grest, Gary S.
TI Forces between functionalized silica nanoparticles in solution
SO PHYSICAL REVIEW E
LA English
DT Article
DE coatings; flocculation; liquid theory; molecular dynamics method;
nanoparticles; phase separation; polymers; silicon compounds;
surfactants; water
ID MOLECULAR-DYNAMICS SIMULATION; POLY(ETHYLENE OXIDE); QUANTUM-CHEMISTRY;
SHEAR; SURFACE; LIQUID; WATER
AB To prevent the flocculation and phase separation of nanoparticles in solution, nanoparticles are often functionalized with short chain surfactants. Here we present fully atomistic molecular dynamics simulations which characterize how these functional coatings affect the interactions between nanoparticles and with the surrounding solvent. For 5-nm-diameter silica nanoparticles coated with poly(ethylene oxide) (PEO) oligomers in water, we determined the hydrodynamic drag on two approaching nanoparticles moving through solvent and on a single nanoparticle as it approaches a planar surface. In most circumstances, macroscale fluid theory accurately predicts the drag on these nanoscale particles. Good agreement is seen with Brenner's analytical solutions for wall separations larger than the soft nanoparticle radius. For two approaching coated nanoparticles, the solvent-mediated (velocity independent) and lubrication (velocity-dependent) forces are purely repulsive and do not exhibit force oscillations that are typical of uncoated rigid spheres.
C1 [Lane, J. Matthew D.; Ismail, Ahmed E.; Chandross, Michael; Grest, Gary S.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Lorenz, Christian D.] Kings Coll London, Mat Res Grp, London WC2R 2LS, England.
RP Lane, JMD (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
RI Ismail, Ahmed/B-7790-2009; Lorenz, Christian/A-6996-2017
OI Ismail, Ahmed/0000-0001-9929-5598; Lorenz, Christian/0000-0003-1028-4804
FU Laboratory Directed Research and Development; Sandia Corporation;
Lockheed Martin Co.; United States Department of Energy's National
Nuclear Security Administration [DE-AC04-94AL85000]
FX The authors thank Frank van Swol and Burkhard Dunweg for useful
discussions. We thank the New Mexico Computing Application Center
(NMCAC) for generous allocation of computer time. This work is supported
by the Laboratory Directed Research and Development program at Sandia
National Laboratories. Sandia is a multiprogram laboratory operated by
Sandia Corporation, a Lockheed Martin Co., for the United States
Department of Energy's National Nuclear Security Administration under
Contract No. DE-AC04-94AL85000.
NR 28
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U1 2
U2 40
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1539-3755
J9 PHYS REV E
JI Phys. Rev. E
PD MAY
PY 2009
VL 79
IS 5
AR 050501
DI 10.1103/PhysRevE.79.050501
PG 4
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 451WD
UT WOS:000266500700010
PM 19518405
ER
PT J
AU Mamontov, E
Vlcek, L
Wesolowski, DJ
Cummings, PT
Rosenqvist, J
Wang, W
Cole, DR
Anovitz, LM
Gasparovic, G
AF Mamontov, Eugene
Vlcek, Lukas
Wesolowski, David J.
Cummings, Peter T.
Rosenqvist, Joergen
Wang, Wei
Cole, David R.
Anovitz, Lawrence M.
Gasparovic, Goran
TI Suppression of the dynamic transition in surface water at low hydration
levels: A study of water on rutile
SO PHYSICAL REVIEW E
LA English
DT Article
DE molecular dynamics method; solvation; surface waves (fluid); titanium
compounds; water
ID BACKSCATTERING NEUTRON SPECTROSCOPY; MOLECULAR-DYNAMICS; PROTEIN
HYDRATION; CONFINED WATER; DIELECTRIC-RELAXATION; SILICA MATRICES;
SCATTERING; CROSSOVER; LYSOZYME; SYSTEMS
AB Our quasielastic neutron-scattering experiments and molecular-dynamics simulations probing surface water on rutile (TiO2) have demonstrated that a sufficiently high hydration level is a prerequisite for the temperature-dependent crossover in the nanosecond dynamics of hydration water. Below the monolayer coverage of mobile surface water, a weak temperature dependence of the relaxation times with no apparent crossover is observed. We associate the dynamic crossover with interlayer jumps of the mobile water molecules, which become possible only at a sufficiently high hydration level.
C1 [Mamontov, Eugene] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
[Vlcek, Lukas; Cummings, Peter T.] Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37235 USA.
[Wesolowski, David J.; Rosenqvist, Joergen; Cole, David R.; Anovitz, Lawrence M.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
[Cummings, Peter T.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
[Wang, Wei] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
[Gasparovic, Goran] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[Gasparovic, Goran] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA.
RP Mamontov, E (reprint author), Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
RI Wang, Wei/B-5924-2012; Cummings, Peter/B-8762-2013; Vlcek,
Lukas/N-7090-2013; Mamontov, Eugene/Q-1003-2015; Anovitz,
Lawrence/P-3144-2016
OI Cummings, Peter/0000-0002-9766-2216; Vlcek, Lukas/0000-0003-4782-7702;
Mamontov, Eugene/0000-0002-5684-2675; Anovitz,
Lawrence/0000-0002-2609-8750
FU U. S. DOE, BES, Division of Chemical Sciences, Geosciences, and
Biosciences [ERKCC41]; Oak Ridge National Laboratory; U. S. DOE
[DE-AC05-00OR22725]
FX The authors are thankful to K. W. Herwig and M. Zamponi for critical
reading of the paper. We used the resource of the Computing Center for
Research and Education at Vanderbilt University and the Institutional
Computational Cluster at ORNL's Chemical Sciences Division. This work
was supported by the U. S. DOE, BES, Division of Chemical Sciences,
Geosciences, and Biosciences through the project "Nanoscale Complexity
at the Oxide/Water Interface" (Project No. ERKCC41) and by Oak Ridge
National Laboratory, managed by UT-Battelle, LLC, for the U. S. DOE
under Contract No. DE-AC05-00OR22725.
NR 48
TC 39
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U1 4
U2 20
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1539-3755
EI 1550-2376
J9 PHYS REV E
JI Phys. Rev. E
PD MAY
PY 2009
VL 79
IS 5
AR 051504
DI 10.1103/PhysRevE.79.051504
PN 1
PG 6
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 451WD
UT WOS:000266500700064
PM 19518459
ER
PT J
AU Wallace, DC
Chisolm, ED
Bock, N
AF Wallace, Duane C.
Chisolm, Eric D.
Bock, Nicolas
TI Improved model for the transit entropy of monatomic liquids
SO PHYSICAL REVIEW E
LA English
DT Article
DE ab initio calculations; copper; density functional theory; entropy;
liquid theory; melting; sodium; vibrational modes
ID INITIO MOLECULAR-DYNAMICS; HIGH PRESSURES; ALKALI-METALS; DEGREES C;
COMPRESSIBILITY; TEMPERATURES; VELOCITY; SODIUM; SOUND; DENSITIES
AB In the original formulation of vibration-transit (V-T) theory for monatomic liquid dynamics, the transit contribution to entropy was taken to be a universal constant, calibrated to the constant-volume entropy of melting. This model suffers two deficiencies: (a) it does not account for experimental entropy differences of +/- 2% among elemental liquids and (b) it implies a value of zero for the transit contribution to internal energy. The purpose of this paper is to correct these deficiencies. To this end, the V-T equation for entropy is fitted to an overall accuracy of +/- 0.1% to the available experimental high-temperature entropy data for elemental liquids. The theory contains two nuclear motion contributions: (a) the dominant vibrational contribution S(vib)(T/theta(0)), where T is temperature and theta(0) is the vibrational characteristic temperature, and (b) the transit contribution S(tr)(T/theta(tr)), where theta(tr) is a scaling temperature for each liquid. The appearance of a common functional form of S(tr) for all the liquids studied is a property of the experimental data, when analyzed via the V-T formula. The resulting S(tr) implies the correct transit contribution to internal energy. The theoretical entropy of melting is derived in a single formula applying to normal and anomalous melting alike. An ab initio calculation of theta(0), based on density-functional theory, is reported for liquid Na and Cu. Comparison of these calculations with the above analysis of experimental entropy data provides verification of V-T theory. In view of the present results, techniques currently being applied in ab initio simulations of liquid properties can be employed to advantage in the further testing and development of V-T theory.
C1 [Wallace, Duane C.; Chisolm, Eric D.; Bock, Nicolas] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Wallace, DC (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
NR 55
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U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1539-3755
J9 PHYS REV E
JI Phys. Rev. E
PD MAY
PY 2009
VL 79
IS 5
AR 051201
DI 10.1103/PhysRevE.79.051201
PG 7
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 451WD
UT WOS:000266500700046
PM 19518441
ER
PT J
AU Chan, TL
Wang, CZ
Ho, KM
Chelikowsky, JR
AF Chan, T. -L.
Wang, C. Z.
Ho, K. M.
Chelikowsky, James R.
TI Efficient First-Principles Simulation of Noncontact Atomic Force
Microscopy for Structural Analysis
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID TOTAL-ENERGY CALCULATIONS; TIO2(110) SURFACE; SI(111); RESOLUTION; IMAGE
AB We propose an efficient scheme to simulate noncontact atomic force microscopy images by using first-principles self-consistent potential from the sample as input without explicit modeling of the atomic force microscopy tip. Our method is applied to various types of semiconductor surfaces including Si(111)-(7 x 7), TiO2(110)-(1 x 1), Ag/Si(111)-(root 3 x root 3)R30 degrees, and Ge/Si(105)-(1 x 2) surfaces. We obtain good agreement with experimental results and previous theoretical studies, and our method can aid in identifying different structural models for surface reconstruction.
C1 [Chan, T. -L.; Chelikowsky, James R.] Univ Texas Austin, Inst Computat Engn & Sci, Ctr Computat Mat, Austin, TX 78712 USA.
[Chan, T. -L.; Wang, C. Z.; Ho, K. M.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Chan, T. -L.; Wang, C. Z.; Ho, K. M.] Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
RP Chan, TL (reprint author), Univ Texas Austin, Inst Computat Engn & Sci, Ctr Computat Mat, Austin, TX 78712 USA.
RI Chan, Tzu-Liang/C-3260-2015;
OI Chan, Tzu-Liang/0000-0002-9655-0917; Wang, Chong/0000-0003-4489-4344
FU Director for Energy Research; Office of Basic Energy Sciences; National
Energy Research Scientific Computing Center and the Texas Advanced
Computing Center; National Science Foundation [DMR-0551195]; U. S. DOE
[DE-FG02-06ER46286, DE-FG02-06ER15760]
FX Ames Laboratory is operated for the U. S. DOE by Iowa State University
under Contract No. DE-AC02-07CH11358. This work was supported by the
Director for Energy Research, Office of Basic Energy Sciences including
a grant of computer time at the National Energy Research Scientific
Computing Center and the Texas Advanced Computing Center. T. L. C. and
J. R. C. acknowledge support from the National Science Foundation under
DMR-0551195 and the U. S. DOE under DE-FG02-06ER46286 and
DE-FG02-06ER15760.
NR 35
TC 14
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U1 1
U2 28
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAY 1
PY 2009
VL 102
IS 17
AR 176101
DI 10.1103/PhysRevLett.102.176101
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 443ZC
UT WOS:000265948300036
PM 19518799
ER
PT J
AU Hoblit, S
Sandorfi, AM
Ardashev, K
Bade, C
Bartalini, O
Blecher, M
Caracappa, A
D'Angelo, A
d'Angelo, A
Di Salvo, R
Fantini, A
Gibson, C
Gluckler, H
Hicks, K
Honig, A
Kageya, T
Khandaker, M
Kistner, OC
Kizilgul, S
Kucuker, S
Lehmann, A
Lowry, M
Lucas, M
Mahon, J
Miceli, L
Moricciani, D
Norum, B
Pap, M
Preedom, B
Seyfarth, H
Schaerf, C
Stroher, H
Thorn, CE
Whisnant, CS
Wang, K
Wei, X
AF Hoblit, S.
Sandorfi, A. M.
Ardashev, K.
Bade, C.
Bartalini, O.
Blecher, M.
Caracappa, A.
D'Angelo, A.
d'Angelo, A.
Di Salvo, R.
Fantini, A.
Gibson, C.
Glueckler, H.
Hicks, K.
Honig, A.
Kageya, T.
Khandaker, M.
Kistner, O. C.
Kizilgul, S.
Kucuker, S.
Lehmann, A.
Lowry, M.
Lucas, M.
Mahon, J.
Miceli, L.
Moricciani, D.
Norum, B.
Pap, M.
Preedom, B.
Seyfarth, H.
Schaerf, C.
Stroeher, H.
Thorn, C. E.
Whisnant, C. S.
Wang, K.
Wei, X.
TI Measurements of HD(gamma,pi) and Implications for the Convergence of the
Gerasimov-Drell-Hern Integral
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SUM-RULE; MAGNETIC MOMENTS; PHOTOPRODUCTION; DEUTERON; NUCLEI
AB We report new measurements of inclusive pi production from frozen-spin HD for polarized photon beams covering the Delta(1232) resonance. These provide data simultaneously on both H and D with nearly complete angular distributions of the spin-difference cross sections entering the Gerasimov-Drell-Hearn (GDH) sum rule. Recent results from Mainz and Bonn exceed the GDH prediction for the proton by 22 mu b, suggesting as yet unmeasured high-energy components. Our pi(0) data reveal a different angular dependence than assumed in Mainz analyses and integrate to a value that is 18 mu b lower, suggesting a more rapid convergence. Our results for deuterium are somewhat lower than published data, considerably more precise, and generally lower than available calculations.
C1 [Hoblit, S.; Ardashev, K.; Norum, B.; Wang, K.] Univ Virginia, Dept Phys, Charlottesville, VA 22901 USA.
[Hoblit, S.; Sandorfi, A. M.; Caracappa, A.; Kistner, O. C.; Lowry, M.; Miceli, L.; Thorn, C. E.; Wei, X.] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
[Ardashev, K.; Gibson, C.; Lehmann, A.; Preedom, B.] Univ S Carolina, Dept Phys, Columbia, SC 29208 USA.
[Bade, C.; Hicks, K.; Kizilgul, S.; Lucas, M.; Mahon, J.] Ohio Univ, Dept Phys, Athens, OH 45701 USA.
[Bartalini, O.; D'Angelo, A.; d'Angelo, A.; Di Salvo, R.; Fantini, A.; Moricciani, D.; Schaerf, C.] Univ Roma Tor Vergata, Rome, Italy.
[Bartalini, O.; D'Angelo, A.; d'Angelo, A.; Di Salvo, R.; Fantini, A.; Moricciani, D.; Schaerf, C.] Ist Nazl Fis Nucl, Sez Roma2, Rome, Italy.
[Blecher, M.; Kageya, T.] Virginia Polytech Inst & State Univ, Dept Phys, Blacksburg, VA 24061 USA.
[Glueckler, H.; Pap, M.; Stroeher, H.] Forschungszentrum Julich, D-52425 Julich, Germany.
[Honig, A.] Syracuse Univ, Dept Phys, Syracuse, NY 13210 USA.
[Khandaker, M.] Norfolk State Univ, Norfolk & Jefferson Lab, Newport News, VA 23606 USA.
[Whisnant, C. S.] James Madison Univ, Harrisonburg, VA 22807 USA.
RP Hoblit, S (reprint author), Univ Virginia, Dept Phys, Charlottesville, VA 22901 USA.
EM hoblit@bnl.gov; sandorfi@jlab.org
RI Fantini, Alessia/J-2478-2012; moricciani, dario/C-5002-2014; D'Angelo,
Annalisa/A-2439-2012;
OI Fantini, Alessia/0000-0002-4643-4731; moricciani,
dario/0000-0002-1737-8857; D'Angelo, Annalisa/0000-0003-3050-4907; Di
Salvo, Rachele/0000-0002-2162-714X
FU U. S. Department of Energy [DE-AC02-98-CH10886]; Istituto Nazionale di
Fisica Nucleare, Italy; U. S. National Science Foundation
FX This work was supported by the U. S. Department of Energy under Contract
No. DE-AC02-98-CH10886, by the Istituto Nazionale di Fisica Nucleare,
Italy, and by the U. S. National Science Foundation. We are indebted to
Mr. F. Lincoln for his technical assistance. We thank Doctors C.
Commeaux, J.-P. Didelez, and G. Rouille for their collaboration during
the early stages of HD target development. One of us (A. M. S.) would
like to thank Doctors A. Fix and H. Arenhovel for supplying their
deuteron calculations.
NR 22
TC 17
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U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAY 1
PY 2009
VL 102
IS 17
AR 172002
DI 10.1103/PhysRevLett.102.172002
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 443ZC
UT WOS:000265948300010
PM 19518773
ER
PT J
AU Kofu, M
Ueda, H
Nojiri, H
Oshima, Y
Zenmoto, T
Rule, KC
Gerischer, S
Lake, B
Batista, CD
Ueda, Y
Lee, SH
AF Kofu, M.
Ueda, H.
Nojiri, H.
Oshima, Y.
Zenmoto, T.
Rule, K. C.
Gerischer, S.
Lake, B.
Batista, C. D.
Ueda, Y.
Lee, S. -H.
TI Magnetic-Field Induced Phase Transitions in a Weakly Coupled s=1/2
Quantum Spin Dimer System Ba3Cr2O8
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID BOSE-EINSTEIN CONDENSATION; CRITICAL-POINT; TLCUCL3; STATES; ESR
AB By using bulk magnetization, electron spin resonance (ESR), heat capacity, and neutron scattering techniques, we characterize the thermodynamic and quantum phase diagrams of Ba3Cr2O8. Our ESR measurements indicate that the low field paramagnetic ground state is a mixed state of the singlet and the S-z=0 triplet for H perpendicular to c. This suggests the presence of an intradimer Dzyaloshinsky-Moriya (DM) interaction with a DM vector perpendicular to the c axis.
C1 [Kofu, M.; Lee, S. -H.] Univ Virginia, Dept Phys, Charlottesville, VA 22904 USA.
[Ueda, H.; Ueda, Y.] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan.
[Nojiri, H.; Oshima, Y.; Zenmoto, T.] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9800821, Japan.
[Rule, K. C.; Gerischer, S.; Lake, B.] Helmholtz Zentrum Berlin, D-14109 Berlin, Germany.
[Lake, B.] Tech Univ Berlin, Inst Festkorperphys, D-10623 Berlin, Germany.
[Batista, C. D.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Kofu, M (reprint author), Univ Virginia, Dept Phys, Charlottesville, VA 22904 USA.
EM shlee@virginia.edu
RI Nojiri, Hiroyuki/B-3688-2011; Oshima, Yugo/H-1031-2013; Batista,
Cristian/J-8008-2016;
OI Oshima, Yugo/0000-0001-9822-8262; Lake, Bella/0000-0003-0034-0964
FU U. S. DOE [DE-FG0207ER46384]; ICC-IMR [KAKENHI20244052]
FX We thank M. Tachiki, S. Haas, Y. B. Kim, S. Ishihara, and O. Nohadni for
helpful discussions, and C. Stock and V. G. Sakai for crystal alignment
for neutron scattering measurements. Work at the University of Virginia
was supported by the U. S. DOE through DE-FG0207ER46384. S.- H. L.
thanks the WPI- Advanced Institute for Materials Research at Tohoku
University for their hospitality during his stay when this work was
partially done. H. N. was supported by ICC-IMR and KAKENHI20244052.
NR 21
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U1 3
U2 26
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAY 1
PY 2009
VL 102
IS 17
AR 177204
DI 10.1103/PhysRevLett.102.177204
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 443ZC
UT WOS:000265948300060
PM 19518823
ER
PT J
AU Langner, MC
Kantner, CLS
Chu, YH
Martin, LM
Yu, P
Seidel, J
Ramesh, R
Orenstein, J
AF Langner, M. C.
Kantner, C. L. S.
Chu, Y. H.
Martin, L. M.
Yu, P.
Seidel, J.
Ramesh, R.
Orenstein, J.
TI Observation of Ferromagnetic Resonance in SrRuO3 by the Time-Resolved
Magneto-Optical Kerr Effect
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SPIN-WAVES; MAGNETIZATION; DYNAMICS; BEHAVIOR
AB We report the observation of ferromagnetic resonance (FMR) in SrRuO3 using the time-resolved magneto-optical Kerr effect. The FMR oscillations in the time-domain appear in response to a sudden, optically induced change in the direction of easy-axis anisotropy. The high FMR frequency, 250 GHz, and large Gilbert damping parameter, alpha approximate to 1, are consistent with strong spin-orbit coupling. We find that the parameters associated with the magnetization dynamics, including alpha, have a nonmonotonic temperature dependence, suggestive of a link to the anomalous Hall effect.
C1 [Langner, M. C.; Kantner, C. L. S.; Yu, P.; Ramesh, R.; Orenstein, J.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Langner, M. C.; Kantner, C. L. S.; Martin, L. M.; Orenstein, J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Chu, Y. H.; Seidel, J.; Ramesh, R.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
RP Langner, MC (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RI Ying-Hao, Chu/A-4204-2008; Martin, Lane/H-2409-2011; Yu, Pu/F-1594-2014;
Orenstein, Joseph/I-3451-2015
OI Ying-Hao, Chu/0000-0002-3435-9084; Martin, Lane/0000-0003-1889-2513;
FU U. S. Department of Energy; Office of Science; National Science Council
FX This research is supported by the U. S. Department of Energy, Office of
Science. Y. H. C. acknowledges the support of the National Science
Council, R. O. C.
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SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAY 1
PY 2009
VL 102
IS 17
AR 177601
DI 10.1103/PhysRevLett.102.177601
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 443ZC
UT WOS:000265948300070
PM 19518833
ER
PT J
AU Robel, I
Gresback, R
Kortshagen, U
Schaller, RD
Klimov, VI
AF Robel, Istvan
Gresback, Ryan
Kortshagen, Uwe
Schaller, Richard D.
Klimov, Victor I.
TI Universal Size-Dependent Trend in Auger Recombination in Direct-Gap and
Indirect-Gap Semiconductor Nanocrystals
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID MULTIPLE EXCITON GENERATION; QUANTUM DOTS; OPTICAL NONLINEARITIES;
SILICON NANOCRYSTALS; CARRIER DYNAMICS; BAND; EMISSION; GAIN; PBSE
AB We report the first experimental observation of a striking convergence of Auger recombination rates in nanocrystals of both direct- (InAs, PbSe, CdSe) and indirect-gap (Ge) semiconductors, which is in contrast to a dramatic difference (by up to 4-5 orders of magnitude) in the Auger decay rates in respective bulk solids. To rationalize this finding, we invoke the effect of confinement-induced mixing between states with different translational momenta, which diminishes the impact of the bulk-semiconductor band structure on multiexciton interactions in nanocrystalline materials.
C1 [Robel, Istvan; Schaller, Richard D.; Klimov, Victor I.] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA.
[Gresback, Ryan; Kortshagen, Uwe] Univ Minnesota, Dept Mech Engn, Minneapolis, MN 55455 USA.
RP Robel, I (reprint author), Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA.
EM rdsx@lanl.gov; klimov@lanl.gov
RI Robel, Istvan/D-4124-2011; Gresback, Ryan/A-6785-2013; Kortshagen,
Uwe/B-8744-2016;
OI Robel, Istvan/0000-0002-9738-7728; Kortshagen, Uwe/0000-0001-5944-3656;
Klimov, Victor/0000-0003-1158-3179
FU MRSEC Program of the National Science Foundation [DMR-0212302,
DMR-0819885]; Office of Basic Energy Sciences; U. S. Department of
Energy (DOE); Los Alamos LDRD funds; DOE Center for Integrated
Nanotechnologies
FX This work was supported by the Office of Basic Energy Sciences, U. S.
Department of Energy ( DOE) and Los Alamos LDRD funds and is part of the
user program of the DOE Center for Integrated Nanotechnologies. R. G.
and U. K. acknowledge partial support by the MRSEC Program of the
National Science Foundation (DMR-0212302 and DMR-0819885).
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SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAY 1
PY 2009
VL 102
IS 17
AR 177404
DI 10.1103/PhysRevLett.102.177404
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 443ZC
UT WOS:000265948300068
PM 19518831
ER
PT J
AU Sitte, M
Rosch, A
Meyer, JS
Matveev, KA
Garst, M
AF Sitte, M.
Rosch, A.
Meyer, J. S.
Matveev, K. A.
Garst, M.
TI Emergent Lorentz Symmetry with Vanishing Velocity in a Critical
Two-Subband Quantum Wire
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
AB We consider a quantum wire with two subbands of spin-polarized electrons in the presence of strong interactions. We focus on the quantum phase transition when the second subband starts to get filled as a function of gate voltage. Performing a one-loop renormalization group analysis of the effective Hamiltonian, we identify the critical fixed-point theory as a conformal field theory having an enhanced SU(2) symmetry and central charge 3/2. While the fixed point is Lorentz invariant, the effective "speed of light" nevertheless vanishes at low energies due to marginally irrelevant operators leading to a diverging critical specific heat coefficient.
C1 [Sitte, M.; Rosch, A.; Garst, M.] Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany.
[Meyer, J. S.] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
[Matveev, K. A.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Sitte, M (reprint author), Univ Cologne, Inst Theoret Phys, Zulpicher Str 77, D-50937 Cologne, Germany.
RI Rosch, Achim/A-2962-2009; Sitte, Matthias/F-8658-2011; Garst,
Markus/B-6740-2012; Meyer, Julia/G-4690-2016
OI Rosch, Achim/0000-0002-6586-5721; Sitte, Matthias/0000-0001-6004-7861;
Garst, Markus/0000-0001-5390-3316;
FU DFG [SFB 608]; U. S. Department of Energy, Office of Science
[DE-AC02-06CH11357, E-FG02-07ER46424]
FX We thank N. Andrei, L. Balents, T. Senthil, and M. Vojta for useful
discussions. This work was supported by the DFG through SFB 608 and by
the U. S. Department of Energy, Office of Science, under Contracts No.
DE-AC02-06CH11357 and No. DE-FG02-07ER46424.
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SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAY 1
PY 2009
VL 102
IS 17
AR 176404
DI 10.1103/PhysRevLett.102.176404
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 443ZC
UT WOS:000265948300041
PM 19518804
ER
PT J
AU Anderson, OA
LoDestro, LL
AF Anderson, O. A.
LoDestro, L. L.
TI Exact solution of the envelope equations for a matched
quadrupole-focused beam in the zero space-charge limit
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB The Kapchinskij-Vladimirskij equations are widely used to study the evolution of the beam envelopes in a periodic system of quadrupole focusing cells. In this paper, we analyze the case of a matched beam. Our model is analogous to that used by Courant and Snyder [E. D. Courant and H. S. Snyder, Ann. Phys. (Paris) 3, 1 ( 1958)], who obtained a first-order approximate solution for a synchrotron. Here, we treat a linear machine and obtain an exact solution. The model uses a full occupancy, piecewise-constant focusing function and neglects space charge. There are solutions in an infinite number of bands as the focus strength is increased. All these bands are stable. Our explicit results for the phase advance sigma and the envelopes a(z) and b(z) are exact for all phase advances except multiples of 180 degrees, where the behavior is singular. We find that the peak envelope size is minimized for sigma similar to 81 degrees. Actual operation in the higher bands would require very large, very accurate field strengths and would produce significantly larger envelope excursions. If such operation were found to be feasible, there would be interesting applications which we discuss.
C1 [Anderson, O. A.] LBNL, Berkeley, CA 94720 USA.
[LoDestro, L. L.] LLNL, Livermore, CA 94551 USA.
RP Anderson, OA (reprint author), LBNL, Berkeley, CA 94720 USA.
FU U.S. Department of Energy [DE-AC02-05CH11231]
FX We thank S. M. Lund for many useful comments and editing help, E. P. Lee
for suggestions on an early version, and the referees for improving the
final product. This work was supported in part by the U.S. Department of
Energy under Contract No. DE-AC02-05CH11231.
NR 14
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAY
PY 2009
VL 12
IS 5
AR 054201
DI 10.1103/PhysRevSTAB.12.054201
PG 7
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 454QP
UT WOS:000266697700014
ER
PT J
AU Chung, M
Gilson, EP
Davidson, RC
Efthimion, PC
Majeski, R
AF Chung, Moses
Gilson, Erik P.
Davidson, Ronald C.
Efthimion, Philip C.
Majeski, Richard
TI Experimental investigation of random noise-induced beam degradation in
high-intensity accelerators using a linear Paul trap
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID HALO FORMATION; SIMULATOR EXPERIMENT; PROPAGATION
AB A random noise-induced beam degradation that could affect intense beam transport over long propagation distances has been experimentally investigated by making use of the transverse beam dynamics equivalence between an alternating-gradient focusing system and a linear Paul trap system. For the present study, machine imperfections in the quadrupole focusing lattice are considered, which are emulated by adding small random noise on the voltage waveform of the quadrupole electrodes in the Paul trap. It is observed that externally driven noise continuously increases the rms radius, transverse emittance, and nonthermal tail of the trapped charge bunch almost linearly with the duration of the noise. The combined effects of collective modes and colored noise are also investigated and compared with numerical simulations.
C1 [Chung, Moses] Fermilab Natl Accelerator Lab, Accelerator Phys Ctr, Batavia, IL 60510 USA.
[Gilson, Erik P.; Davidson, Ronald C.; Efthimion, Philip C.; Majeski, Richard] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Chung, M (reprint author), Fermilab Natl Accelerator Lab, Accelerator Phys Ctr, POB 500, Batavia, IL 60510 USA.
FU U.S. Department of Energy
FX This research was supported by the U.S. Department of Energy. The
authors would like to thank Andy Carpe for his excellent technical
support, and Mikhail Dorf for useful discussions regarding the WARP
simulations. The research was carried out at Plasma Physics Laboratory
while the corresponding author (Moses Chung) was at Princeton
University.
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SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAY
PY 2009
VL 12
IS 5
AR 054203
DI 10.1103/PhysRevSTAB.12.054203
PG 11
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 454QP
UT WOS:000266697700016
ER
PT J
AU Jeon, D
Groening, L
Franchetti, G
AF Jeon, D.
Groening, L.
Franchetti, G.
TI Fourth order resonance of a high intensity linear accelerator
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID HALO FORMATION
AB It is discovered that, for a high intensity beam, the 4 sigma = 360 degrees (or 4 nu = 1) resonance of a linear accelerator is manifested through the octupolar term of space charge potential when the depressed phase advance per cell sigma is close to and below 90 degrees but no resonance effect is observed when sigma is just above 90 degrees. To verify that this is a resonance, a frequency analysis is performed and a study of resonance crossing from above and from below the resonance is conducted. It is observed that this fourth order resonance is dominating over the better known envelope instability and practically replacing it. The simulation study shows a clear emittance growth by this resonance and its stop band. A proposal to GSI was made to perform an experiment to measure the stop band of this resonance using the UNILAC. The experiment confirmed this resonance and will be published in a separate paper.
C1 [Jeon, D.] Oak Ridge Natl Lab, SNS, Oak Ridge, TN 37831 USA.
[Groening, L.; Franchetti, G.] GSI, Darmstadt, Germany.
RP Jeon, D (reprint author), Oak Ridge Natl Lab, SNS, Oak Ridge, TN 37831 USA.
EM jeond@ornl.gov
RI Jeon, Dong-O/S-2137-2016
OI Jeon, Dong-O/0000-0001-6482-5878
FU EU-FP6 CARE-HIPPI [RII3-CT-2003-506395]; SNS; U.S. Department of Energy
[DE-AC05-00OR22725]
FX This work is a result of the collaboration between GSI-FAIR and SNS. The
authors would like to express their gratitude to Professor I. Hofmann
for his advice and comments. One of the authors (D.J.) is grateful for
the hospitality of GSI and the partial support through the EU-FP6
CARE-HIPPI (Contract No. RII3-CT-2003-506395). He also is very grateful
for the support of the SNS management. SNS is managed by UT-Battelle,
LLC, under Contract No. DE-AC05-00OR22725 for the U.S. Department of
Energy.
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SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAY
PY 2009
VL 12
IS 5
AR 054204
DI 10.1103/PhysRevSTAB.12.054204
PG 5
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 454QP
UT WOS:000266697700017
ER
PT J
AU Kim, AA
Mazarakis, MG
Sinebryukhov, VA
Kovalchuk, BM
Visir, VA
Volkov, SN
Bayol, F
Bastrikov, AN
Durakov, VG
Frolov, SV
Alexeenko, VM
McDaniel, DH
Fowler, WE
LeChien, K
Olson, C
Stygar, WA
Struve, KW
Porter, J
Gilgenbach, RM
AF Kim, A. A.
Mazarakis, M. G.
Sinebryukhov, V. A.
Kovalchuk, B. M.
Visir, V. A.
Volkov, S. N.
Bayol, F.
Bastrikov, A. N.
Durakov, V. G.
Frolov, S. V.
Alexeenko, V. M.
McDaniel, D. H.
Fowler, W. E.
LeChien, K.
Olson, C.
Stygar, W. A.
Struve, K. W.
Porter, J.
Gilgenbach, R. M.
TI Development and tests of fast 1-MA linear transformer driver stages
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB In this article we present the design and test results of the most powerful, fast linear transformer driver (LTD) stage developed to date. This 1-MA LTD stage consists of 40 parallel RLC (resistor R, inductor L, and capacitor C) circuits called "bricks'' that are triggered simultaneously; it is able to deliver similar to 1 MA current pulse with a rise time of similar to 100 ns into the similar to 0.1-Ohm matched load. The electrical behavior of the stage can be predicted by using a simple RLC circuit, thus simplifying the designing of various LTD-based accelerators. Five 1-MA LTD stages assembled in series into a module have been successfully tested with both resistive and vacuum electron-beam diode loads.
C1 [Kim, A. A.; Sinebryukhov, V. A.; Kovalchuk, B. M.; Visir, V. A.; Volkov, S. N.; Bastrikov, A. N.; Durakov, V. G.; Frolov, S. V.; Alexeenko, V. M.] Russian Acad Sci, Inst High Current Elect, Tomsk 634055, Russia.
[Mazarakis, M. G.; McDaniel, D. H.; Fowler, W. E.; LeChien, K.; Olson, C.; Stygar, W. A.; Struve, K. W.; Porter, J.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Bayol, F.] Int Technol High Pulsed Power, F-46500 Thegra, France.
[Gilgenbach, R. M.] Univ Michigan, Ann Arbor, MI 48109 USA.
RP Kim, AA (reprint author), Russian Acad Sci, Inst High Current Elect, Tomsk 634055, Russia.
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAY
PY 2009
VL 12
IS 5
AR 050402
DI 10.1103/PhysRevSTAB.12.050402
PG 10
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 454QP
UT WOS:000266697700004
ER
PT J
AU Kirby, N
Blumenfeld, I
Clayton, CE
Decker, FJ
Hogan, MJ
Huang, C
Ischebeck, R
Iverson, RH
Joshi, C
Katsouleas, T
Lu, W
Marsh, KA
Martins, SF
Mori, WB
Muggli, P
Oz, E
Siemann, RH
Walz, DR
Zhou, M
AF Kirby, N.
Blumenfeld, I.
Clayton, C. E.
Decker, F. J.
Hogan, M. J.
Huang, C.
Ischebeck, R.
Iverson, R. H.
Joshi, C.
Katsouleas, T.
Lu, W.
Marsh, K. A.
Martins, S. F.
Mori, W. B.
Muggli, P.
Oz, E.
Siemann, R. H.
Walz, D. R.
Zhou, M.
TI Transverse emittance and current of multi-GeV trapped electrons in a
plasma wakefield accelerator
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID LASER WAKEFIELD; BEAMS
AB Multi-GeV trapped electron bunches in a plasma wakefield accelerator (PWFA) are observed with normalized transverse emittance divided by peak current, epsilon(N,x)/I(t), below the level of 0.2 mu m/kA. A theoretical model of the trapped electron emittance, developed here, indicates that emittance scales inversely with the square root of the plasma density in the nonlinear "bubble'' regime of the PWFA. This model and simulations indicate that the observed values of epsilon(N,x)/I(t) result from multi-GeV trapped electron bunches with emittances of a few mu m and multi-kA peak currents.
C1 [Kirby, N.; Blumenfeld, I.; Decker, F. J.; Hogan, M. J.; Ischebeck, R.; Iverson, R. H.; Siemann, R. H.; Walz, D. R.] SLAC, Menlo Pk, CA 94025 USA.
[Clayton, C. E.; Huang, C.; Joshi, C.; Lu, W.; Marsh, K. A.; Mori, W. B.; Zhou, M.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
[Katsouleas, T.; Muggli, P.; Oz, E.] Univ So Calif, Los Angeles, CA 90089 USA.
RP Kirby, N (reprint author), SLAC, Menlo Pk, CA 94025 USA.
RI Lu, Wei/F-2504-2016
FU Department of Energy [DE-AC02-76SF00515, DE-FG02-93ER40745,
DE-FG03-92ER40727, DE-FG52-06NA26195, DE-FC02-07ER41500,
DE-FG02-03ER54721, DE-FG02-92ER40727]; National Science Foundation
[NSF-Phy-0321345]; FCT (Portugal)
FX The authors would like to thank Melissa Berry and Professor Alexander
Chao. The Dawson cluster (UCLA) produced the OSIRIS simulations. This
work was supported by Department of Energy Contracts No.
DE-AC02-76SF00515, No. DE-FG02-93ER40745, No. DE-FG03-92ER40727, No.
DE-FG52-06NA26195, No. DE-FC02-07ER41500, No. DE-FG02-03ER54721, No.
DE-FG02-92ER40727, National Science Foundation Grant No.
NSF-Phy-0321345, and by FCT (Portugal).
NR 26
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SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAY
PY 2009
VL 12
IS 5
AR 051302
DI 10.1103/PhysRevSTAB.12.051302
PG 5
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 454QP
UT WOS:000266697700011
ER
PT J
AU Liu, WM
Gai, W
AF Liu, Wanming
Gai, Wei
TI Wakefield generation by a relativistic ring beam in a coaxial
two-channel dielectric loaded structure
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB In this paper, we give a complete analytical solution for wakefields generated by an azimuthally symmetric ring beam propagating in a coaxial two-channel dielectric structure. This wakefield can be used to accelerate a witness beam in the central channel. The ratio of the peak accelerating field in the center channel to the decelerating field in the ring channel (defined as transformer ratio R) is also derived. We find that, by appropriate choice of parameters, R can be much greater than 2, the limiting value for collinear wakefield accelerators.
C1 [Liu, Wanming; Gai, Wei] Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA.
RP Liu, WM (reprint author), Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA.
FU High Energy Physics Division, DOE [DE-AC02-06CH11357]
FX We would like to thank Dr. Jay Hirshfield of Yale University for
suggesting the coaxial dielectric wakefield experiment and bringing it
to our attention. This work is supported by the High Energy Physics
Division, DOE under Contract No. DE-AC02-06CH11357.
NR 13
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SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAY
PY 2009
VL 12
IS 5
AR 051301
DI 10.1103/PhysRevSTAB.12.051301
PG 6
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 454QP
UT WOS:000266697700010
ER
PT J
AU Lumpkin, AH
Dejus, RJ
Sereno, NS
AF Lumpkin, A. H.
Dejus, R. J.
Sereno, N. S.
TI Coherent optical transition radiation and self-amplified spontaneous
emission generated by chicane-compressed electron beams (vol 12, 040704,
2009)
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Correction
C1 [Dejus, R. J.] Argonne Natl Lab, Argonne, IL 60439 USA.
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SN 1098-4402
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JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAY
PY 2009
VL 12
IS 5
AR 059901
DI 10.1103/PhysRevSTAB.12.059901
PG 1
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 454QP
UT WOS:000266697700018
ER
PT J
AU Mazarakis, MG
Fowler, WE
Kim, AA
Sinebryukhov, VA
Rogowski, ST
Sharpe, RA
McDaniel, DH
Olson, CL
Porter, JL
Struve, KW
Stygar, WA
Woodworth, JR
AF Mazarakis, Michael G.
Fowler, William E.
Kim, Alexander A.
Sinebryukhov, Vadim A.
Rogowski, Sonrisa T.
Sharpe, Robin A.
McDaniel, Dillon H.
Olson, Craig L.
Porter, John L.
Struve, Kenneth W.
Stygar, William A.
Woodworth, Joseph R.
TI High current, 0.5-MA, fast, 100-ns, linear transformer driver
experiments
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB The linear transformer driver (LTD) is a new method for constructing high current, high-voltage pulsed accelerators. The salient feature of the approach is switching and inductively adding the pulses at low voltage straight out of the capacitors through low inductance transfer and soft iron core isolation. Sandia National Laboratories are actively pursuing the development of a new class of accelerator based on the LTD technology. Presently, the high current LTD experimental research is concentrated on two aspects: first, to study the repetition rate capabilities, reliability, reproducibility of the output pulses, switch prefires, jitter, electrical power and energy efficiency, and lifetime measurements of the cavity active components; second, to study how a multicavity linear array performs in a voltage adder configuration relative to current transmission, energy and power addition, and wall plug to output pulse electrical efficiency. Here we report the repetition rate and lifetime studies performed in the Sandia High Current LTD Laboratory. We first utilized the prototype similar to 0.4-MA, LTD I cavity which could be reliably operated up to +/-90-kV capacitor charging. Later we obtained an improved 0.5-MA, LTD II version that can be operated at +/-100 kV maximum charging voltage. The experimental results presented here were obtained with both cavities and pertain to evaluating the maximum achievable repetition rate and LTD cavity performance. The voltage adder experiments with a series of double sized cavities (1 MA, +/-100 kV) will be reported in future publications.
C1 [Mazarakis, Michael G.; Fowler, William E.; Rogowski, Sonrisa T.; Sharpe, Robin A.; McDaniel, Dillon H.; Olson, Craig L.; Porter, John L.; Struve, Kenneth W.; Stygar, William A.; Woodworth, Joseph R.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Kim, Alexander A.; Sinebryukhov, Vadim A.] HCEI, Tomsk, Russia.
RP Mazarakis, MG (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
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SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAY
PY 2009
VL 12
IS 5
AR 050401
DI 10.1103/PhysRevSTAB.12.050401
PG 10
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 454QP
UT WOS:000266697700003
ER
PT J
AU Pozdeyev, E
Rodriguez, JA
Marti, F
York, RC
AF Pozdeyev, E.
Rodriguez, J. A.
Marti, F.
York, R. C.
TI Longitudinal beam dynamics studies with space charge in small
isochronous ring
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB Studies of the longitudinal beam dynamics in the small isochronous ring (SIR) at Michigan State University revealed a fast, space-charge driven instability that did not fit the model of the negative mass instability. The observed beam behavior can be explained by the transverse horizontal component of the coherent space- charge force and its effect on the longitudinal motion. This force effectively modifies the slip factor, shifting the isochronous point and enhancing the negative mass instability. This paper presents results of numerical and experimental studies of the longitudinal beam dynamics in SIR and proposes a simple analytical model explaining these results.
C1 [Pozdeyev, E.] BNL, Upton, NY 11973 USA.
[Rodriguez, J. A.] CERN, Geneva, Switzerland.
[Marti, F.; York, R. C.] MSU, NSCL, Lansing, MI 48824 USA.
RP Pozdeyev, E (reprint author), BNL, Upton, NY 11973 USA.
EM pozdeyev@bnl.gov
NR 6
TC 8
Z9 8
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAY
PY 2009
VL 12
IS 5
AR 054202
DI 10.1103/PhysRevSTAB.12.054202
PG 9
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 454QP
UT WOS:000266697700015
ER
PT J
AU Wang, X
Muggli, P
Katsouleas, T
Joshi, C
Mori, WB
Ischebeck, R
Hogan, MJ
AF Wang, X.
Muggli, P.
Katsouleas, T.
Joshi, C.
Mori, W. B.
Ischebeck, R.
Hogan, M. J.
TI Optimization of positron trapping and acceleration in an
electron-beam-driven plasma wakefield accelerator
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB Positron trapping and acceleration in a plasma wake using a four-bunch scheme [X. Wang et al., Phys. Rev. Lett. 101, 124801 (2008)] is numerically investigated through 2D particle-in-cell simulations. This scheme that integrates positron generation, trapping, and acceleration into a single stage is a promising approach for investigating positron acceleration in an electron-beam-driven wake. It consists of a plasma with an embedded thin foil target into which two closely spaced electron beams are shot. The first beam creates a region for accelerating and focusing positrons and the second beam provides positrons to be accelerated. Some of the outstanding issues related to the quality of the accelerated positron beam load are discussed as a function of the beam and plasma parameters. Simulations show that a large number of positrons (10(7)-10(8)) can be trapped when the plasma wake is modestly nonlinear, and the positron-generating foil target must be immersed into the plasma. Beam loading can reduce the energy spread of the positron beam load. The quality of the positron beam load is not very sensitive to the exact bunch spacing between the drive electron bunch and the positron beam load.
C1 [Wang, X.; Muggli, P.; Katsouleas, T.] Univ So Calif, Los Angeles, CA 90089 USA.
[Joshi, C.; Mori, W. B.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
[Ischebeck, R.; Hogan, M. J.] Stanford Linear Accelerator Ctr, Stanford, CA 94025 USA.
RP Wang, X (reprint author), Univ So Calif, Los Angeles, CA 90089 USA.
FU Department of Energy [DE-FC02-01ER41192, DE-AC02-76SF00515,
DE-FG03-92ER40745, DE-FG52-06NA26195, DE-FG0392ER40727,
DE-AC-0376SF0098, DE-FG02-03ER54721]; National Science Foundation
[ECS-9632735, DMS-9722121, PHY-0078715]
FX This work was supported by Department of Energy Contracts No.
DE-FC02-01ER41192, No. DE-AC02-76SF00515 (SLAC), No. DE-FG03-92ER40745,
No. DE-FG52-06NA26195, No. DE-FG0392ER40727, No. DE-AC-0376SF0098, No.
DE-FG02-03ER54721, and National Science Foundation Grants No.
ECS-9632735, No. DMS-9722121, and No. PHY-0078715. Simulations were done
at the USC Center for High Performance Computing and Communications
(HPCC). Useful discussions with the members of the E-167 collaboration
at SLAC are greatly acknowledged.
NR 25
TC 5
Z9 5
U1 1
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAY
PY 2009
VL 12
IS 5
AR 051303
DI 10.1103/PhysRevSTAB.12.051303
PG 8
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 454QP
UT WOS:000266697700012
ER
PT J
AU Connington, K
Kang, QJ
Viswanathan, H
Abdel-Fattah, A
Chen, SY
AF Connington, Kevin
Kang, Qinjun
Viswanathan, Hari
Abdel-Fattah, Amr
Chen, Shiyi
TI Peristaltic particle transport using the lattice Boltzmann method
SO PHYSICS OF FLUIDS
LA English
DT Article
DE lattice Boltzmann methods; multiphase flow; peristaltic flow; pipe flow
ID NAVIER-STOKES EQUATION; PARTICULATE SUSPENSIONS; NUMERICAL SIMULATIONS;
SOLID PARTICLES; REYNOLDS-NUMBER; FLOW; MOTION; FLUID; CHANNEL; WALLS
AB Peristaltic transport refers to a class of internal fluid flows where the periodic deformation of flexible containing walls elicits a non-negligible fluid motion. It is a mechanism used to transport fluid and immersed solid particles in a tube or channel when it is ineffective or impossible to impose a favorable pressure gradient or desirous to avoid contact between the transported mixture and mechanical moving parts. Peristaltic transport occurs in many physiological situations and has myriad industrial applications. We focus our study on the peristaltic transport of a macroscopic particle in a two-dimensional channel using the lattice Boltzmann method. We systematically investigate the effect of variation of the relevant dimensionless parameters of the system on the particle transport. We find, among other results, a case where an increase in Reynolds number can actually lead to a slight increase in particle transport, and a case where, as the wall deformation increases, the motion of the particle becomes non-negative only. We examine the particle behavior when the system exhibits the peculiar phenomenon of fluid trapping. Under these circumstances, the particle may itself become trapped where it is subsequently transported at the wave speed, which is the maximum possible transport in the absence of a favorable pressure gradient. Finally, we analyze how the particle presence affects stress, pressure, and dissipation in the fluid in hopes of determining preferred working conditions for peristaltic transport of shear-sensitive particles. We find that the levels of shear stress are most hazardous near the throat of the channel. We advise that shear-sensitive particles should be transported under conditions where trapping occurs as the particle is typically situated in a region of innocuous shear stress levels.
C1 [Connington, Kevin; Chen, Shiyi] Johns Hopkins Univ, Dept Mech Engn, Baltimore, MD 21218 USA.
[Connington, Kevin; Kang, Qinjun; Viswanathan, Hari; Abdel-Fattah, Amr] Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
[Chen, Shiyi] Peking Univ, CoE, Beijing, Peoples R China.
[Chen, Shiyi] Peking Univ, CCSE, Beijing, Peoples R China.
RP Connington, K (reprint author), Johns Hopkins Univ, Dept Mech Engn, Baltimore, MD 21218 USA.
EM kconnin1@jhu.edu
RI Chen, Shiyi/A-3234-2010; Kang, Qinjun/A-2585-2010
OI Kang, Qinjun/0000-0002-4754-2240
NR 56
TC 20
Z9 20
U1 1
U2 21
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-6631
J9 PHYS FLUIDS
JI Phys. Fluids
PD MAY
PY 2009
VL 21
IS 5
AR 053301
DI 10.1063/1.3111782
PG 16
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 451WB
UT WOS:000266500500019
ER
PT J
AU Cook, AW
AF Cook, Andrew W.
TI Enthalpy diffusion in multicomponent flows
SO PHYSICS OF FLUIDS
LA English
DT Article
DE combustion; diffusion; enthalpy; Navier-Stokes equations; turbulence
ID RAYLEIGH-TAYLOR INSTABILITY; RICHTMYER-MESHKOV INSTABILITY; EFFECTIVE
BINARY DIFFUSION; GAS-MIXTURES; NUMERICAL-SIMULATION; SHOCK-WAVES;
RESOLUTION; CONSISTENT; DYNAMICS; SCHEMES
AB The enthalpy diffusion flux in the multicomponent energy equation is a well-known yet frequently neglected term. It accounts for energy changes associated with compositional changes resulting from species diffusion. The term prevents local violations of the entropy condition in flows where significant mixing occurs between species of dissimilar molecular weight. In simulations of nonpremixed combustion, omission of the enthalpy flux can lead to anomalous temperature gradients, which may cause mixing regions to exceed ignition conditions. The term can also play a role in generating acoustic noise in turbulent mixing layers. Euler solvers that rely on numerical diffusion to blend fluids at the grid scale cannot reliably predict temperatures in mixing regions. On the other hand, Navier-Stokes solvers that incorporate enthalpy diffusion can provide much more accurate results. In constructing turbulence closures for high Reynolds number mixing, the same turbulent diffusion model that appears in the species mass transport equation should also appear in the energy equation as part of a "turbulent enthalpy diffusion;" otherwise the energy and species transport equations will not be consistent.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Cook, AW (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM awcook@llnl.gov
NR 49
TC 37
Z9 37
U1 0
U2 10
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-6631
EI 1089-7666
J9 PHYS FLUIDS
JI Phys. Fluids
PD MAY
PY 2009
VL 21
IS 5
AR 055109
DI 10.1063/1.3139305
PG 16
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 451WB
UT WOS:000266500500040
ER
PT J
AU Bailey, JE
Rochau, GA
Mancini, RC
Iglesias, CA
MacFarlane, JJ
Golovkin, IE
Blancard, C
Cosse, P
Faussurier, G
AF Bailey, J. E.
Rochau, G. A.
Mancini, R. C.
Iglesias, C. A.
MacFarlane, J. J.
Golovkin, I. E.
Blancard, C.
Cosse, Ph.
Faussurier, G.
TI Experimental investigation of opacity models for stellar interior,
inertial fusion, and high energy density plasmas
SO PHYSICS OF PLASMAS
LA English
DT Article
DE opacity; plasma inertial confinement; plasma light propagation; plasma
transport processes; stellar internal processes; Z pinch
ID X-RAY RESPONSE; ABSORPTION-SPECTROSCOPY; RADIATIVE ACCELERATIONS; SOLAR
ABUNDANCES; CONSTRAINED SAMPLES; PHOTOGRAPHIC FILMS; THIN FOILS; Z
PINCHES; HELIOSEISMOLOGY; ALUMINUM
AB Theoretical opacities are required for calculating energy transport in plasmas. In particular, understanding stellar interiors, inertial fusion, and Z pinches depends on the opacities of mid-atomic-number elements over a wide range of temperatures. The 150-300 eV temperature range is particularly interesting. The opacity models are complex and experimental validation is crucial. For example, solar models presently disagree with helioseismology and one possible explanation is inadequate theoretical opacities. Testing these opacities requires well-characterized plasmas at temperatures high enough to produce the ion charge states that exist in the sun. Typical opacity experiments heat a sample using x rays and measure the spectrally resolved transmission with a backlight. The difficulty grows as the temperature increases because the heating x-ray source must supply more energy and the backlight must be bright enough to overwhelm the plasma self-emission. These problems can be overcome with the new generation of high energy density (HED) facilities. For example, recent experiments at Sandia's Z facility [M. K. Matzen , Phys. Plasmas 12, 055503 (2005)] measured the transmission of a mixed Mg and Fe plasma heated to 156 +/- 6 eV. This capability will also advance opacity science for other HED plasmas. This tutorial reviews experimental methods for testing opacity models, including experiment design, transmission measurement methods, accuracy evaluation, and plasma diagnostics. The solar interior serves as a focal problem and Z facility experiments illustrate the techniques.
C1 [Bailey, J. E.; Rochau, G. A.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Mancini, R. C.] Univ Nevada, Reno, NV 89557 USA.
[Iglesias, C. A.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[MacFarlane, J. J.; Golovkin, I. E.] Prism Computat Sci, Madison, WI 53703 USA.
[Blancard, C.; Cosse, Ph.; Faussurier, G.] DIF, DAM, CEA, F-91297 Arpajon, France.
RP Bailey, JE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 99
TC 66
Z9 68
U1 2
U2 19
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 058101
DI 10.1063/1.3089604
PG 16
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600140
ER
PT J
AU Bhattacharjee, A
Davidson, RC
AF Bhattacharjee, Amitava
Davidson, Ronald C.
TI Foreword to Special Issue: Papers from the 50th Annual Meeting of the
APS Division of Plasma Physics, Dallas, Texas, 2008
SO PHYSICS OF PLASMAS
LA English
DT Editorial Material
DE plasma
AB The year 2008 marked the 50th Anniversary of the Division of Plasma Physics (DPP) of the American Physical Society. This Special Issue presents many of the Review, Tutorial, and Invited papers that were presented at the 2008 Annual Meeting of the DPP, which was held 17-21 November, in Dallas, Texas. We are very pleased that many of the speakers have submitted an archival-quality version of their presentation for peer review and publication in Physics of Plasmas.
C1 [Bhattacharjee, Amitava] Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA.
[Bhattacharjee, Amitava] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA.
[Davidson, Ronald C.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Bhattacharjee, A (reprint author), Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 055301
DI 10.1063/1.3127488
PG 1
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600078
ER
PT J
AU Boehly, TR
Munro, D
Celliers, PM
Olson, RE
Hicks, DG
Goncharov, VN
Collins, GW
Robey, HF
Hu, SX
Morozas, JA
Sangster, TC
Landen, OL
Meyerhofer, DD
AF Boehly, T. R.
Munro, D.
Celliers, P. M.
Olson, R. E.
Hicks, D. G.
Goncharov, V. N.
Collins, G. W.
Robey, H. F.
Hu, S. X.
Morozas, J. A.
Sangster, T. C.
Landen, O. L.
Meyerhofer, D. D.
TI Demonstration of the shock-timing technique for ignition targets on the
National Ignition Facility
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE explosions; plasma inertial confinement; plasma shock waves
ID DRIVEN
AB A high-performance inertial confinement fusion capsule is compressed by multiple shock waves before it implodes. To minimize the entropy acquired by the fuel, the strength and timing of those shock waves must be accurately controlled. Ignition experiments at the National Ignition Facility (NIF) will employ surrogate targets designed to mimic ignition targets while making it possible to measure the shock velocities inside the capsule. A series of experiments on the OMEGA laser facility [Boehly , Opt. Commun. 133, 495 (1997)] validated those targets and the diagnostic techniques proposed. Quartz was selected for the diagnostic window and shock-velocity measurements were demonstrated in Hohlraum targets heated to 180 eV. Cryogenic experiments using targets filled with liquid deuterium further demonstrated the entire timing technique in a Hohlraum environment. Direct-drive cryogenic targets with multiple spherical shocks were used to further validate this technique, including convergence effects at relevant pressures (velocities) and sizes. These results provide confidence that shock velocity and timing can be measured in NIF ignition targets, allowing these critical parameters to be optimized.
C1 [Boehly, T. R.; Goncharov, V. N.; Hu, S. X.; Morozas, J. A.; Sangster, T. C.; Meyerhofer, D. D.] Univ Rochester, Laser Energet Lab, New York, NY 14645 USA.
[Munro, D.; Celliers, P. M.; Hicks, D. G.; Collins, G. W.; Robey, H. F.; Landen, O. L.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Olson, R. E.] Sandia Natl Labs, Albuquerque, NM 87123 USA.
[Goncharov, V. N.; Meyerhofer, D. D.] Univ Rochester, Dept Mech Engn, New York, NY 14645 USA.
[Meyerhofer, D. D.] Univ Rochester, Dept Phys & Astron, New York, NY 14645 USA.
RP Boehly, TR (reprint author), Univ Rochester, Laser Energet Lab, New York, NY 14645 USA.
RI Hu, Suxing/A-1265-2007; Collins, Gilbert/G-1009-2011; Goncharov,
Valeri/H-4471-2011; Hicks, Damien/B-5042-2015
OI Hu, Suxing/0000-0003-2465-3818; Hicks, Damien/0000-0001-8322-9983
NR 18
TC 61
Z9 64
U1 0
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056302
DI 10.1063/1.3078422
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600115
ER
PT J
AU Chang, CS
Ku, S
Diamond, PH
Lin, Z
Parker, S
Hahm, TS
Samatova, N
AF Chang, C. S.
Ku, S.
Diamond, P. H.
Lin, Z.
Parker, S.
Hahm, T. S.
Samatova, N.
TI Compressed ion temperature gradient turbulence in diverted tokamak edge
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE plasma boundary layers; plasma density; plasma instability; plasma
simulation; plasma toroidal confinement; plasma transport processes;
plasma turbulence; Tokamak devices
ID GYROKINETIC PARTICLE SIMULATION; POLOIDAL ELECTRIC-FIELD; NEOCLASSICAL
TRANSPORT; ZONAL FLOWS; PLASMA; GEOMETRY; ROTATION
AB It is found from a heat-flux-driven full-f gyrokinetic particle simulation that there is ion temperature gradient (ITG) turbulence across an entire L-mode-like edge density pedestal in a diverted tokamak plasma in which the ion temperature gradient is mild without a pedestal structure, hence the normalized ion temperature gradient parameter eta(i)=(d log T(i)/dr)/(d log n/dr) varies strongly from high (>4 at density pedestal top/shoulder) to low (< 2 in the density slope) values. Variation of density and eta(i) is in the same scale as the turbulence correlation length, compressing the turbulence in the density slope region. The resulting ion thermal flux is on the order of experimentally inferred values. The present study strongly suggests that a localized estimate of the ITG-driven chi(i) will not be valid due to the nonlocal dynamics of the compressed turbulence in an L-mode-type density slope. While the thermal transport and the temperature profile saturate quickly, the ExB rotation shows a longer time damping during the turbulence. In addition, a radially in-out mean potential variation is observed.
C1 [Chang, C. S.; Ku, S.] NYU, Courant Inst Math Sci, New York, NY 10012 USA.
[Chang, C. S.] Korea Adv Inst Sci & Technol, Dept Phys, Taejon 305701, South Korea.
[Diamond, P. H.] Univ Calif San Diego, Ctr Astrophys & Space Sci, La Jolla, CA 92093 USA.
[Diamond, P. H.] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
[Lin, Z.] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
[Parker, S.] Univ Colorado, Boulder, CO 80309 USA.
[Hahm, T. S.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Samatova, N.] N Carolina State Univ, Raleigh, NC 27695 USA.
[Samatova, N.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Chang, CS (reprint author), NYU, Courant Inst Math Sci, 251 Mercer St, New York, NY 10012 USA.
EM cschang@cims.nyu.edu
RI Ku, Seung-Hoe/D-2315-2009
OI Ku, Seung-Hoe/0000-0002-9964-1208
NR 39
TC 37
Z9 37
U1 2
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056108
DI 10.1063/1.3099329
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600101
ER
PT J
AU Choi, M
Chan, VS
Berry, LA
Jaeger, EF
Green, D
Bonoli, P
Wright, J
AF Choi, M.
Chan, V. S.
Berry, L. A.
Jaeger, E. F.
Green, D.
Bonoli, P.
Wright, J.
CA RF SciDAC Team
TI Comparison of the Monte Carlo ion cyclotron heating model with the
full-wave linear absorption model
SO PHYSICS OF PLASMAS
LA English
DT Article
DE Monte Carlo methods; plasma electromagnetic wave propagation; plasma
simulation; plasma waves
ID PLASMAS; TOKAMAK
AB To fully account for the wave-particle interaction physics in ion cyclotron resonant frequency (ICRF) heating experiment, finite orbit effects and non-Maxwellian distribution have to be self-consistently coupled with full-wave solutions. For this purpose, the five-dimensional Monte Carlo code ORBIT-RF [M. Choi , Phys. Plasmas 12, 1 (2005)] is being coupled with the two-dimensional full-wave code AORSA [E. F. Jaeger , Phys. Plasmas 13, 056101 (2006)] to iteratively evolve the ion distribution in four-dimensional spatial velocity space that is used to update the dielectric tensor in AORSA for evaluating the full-wave fields. In this paper, it is demonstrated that using the full-wave fields from a Maxwellian dielectric tensor in AORSA and confining the resonant ions to their initial orbits in ORBIT-RF, ORBIT-RF largely reproduces the AORSA linear wave absorption profiles for fundamental and higher harmonic ICRF heating. An exception is an observed inward shift in the ORBIT-RF absorption peak for high harmonics near the magnetic axis compared with that of AORSA, which can be attributed to a finite orbit width effect. The success of this verification supports the validity of the Monte Carlo wave-particle interaction model and the readiness of the iterative coupling between ORBIT-RF and AORSA for an improved modeling of ICRF heating experiments.
C1 [Choi, M.; Chan, V. S.] Gen Atom Co, San Diego, CA 92186 USA.
[Berry, L. A.; Jaeger, E. F.; Green, D.] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA.
[Bonoli, P.; Wright, J.] MIT, Cambridge, MA 02139 USA.
RP Choi, M (reprint author), Gen Atom Co, POB 85608, San Diego, CA 92186 USA.
FU U.S. Department of Energy [DE-FG03-95ER54309, DE-AC05-00OR22725]
FX This work was supported in part by the U.S. Department of Energy under
Grant Nos. DE-FG03-95ER54309 and DE-AC05-00OR22725. The authors would
like to thank Professor M. Porkolab at MIT for his many discussions.
NR 18
TC 7
Z9 7
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 052513
DI 10.1063/1.3138745
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600038
ER
PT J
AU Edlund, EM
Porkolab, M
Kramer, GJ
Lin, L
Lin, Y
Wukitch, SJ
AF Edlund, E. M.
Porkolab, M.
Kramer, G. J.
Lin, L.
Lin, Y.
Wukitch, S. J.
TI Phase contrast imaging measurements of reversed shear Alfven eigenmodes
during sawteeth in Alcator C-Mod
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
ID SAFETY-FACTOR PROFILE; TOKAMAK; WAVES; PLASMAS; JET
AB Reversed shear Alfven eigenmodes (RSAEs) have been observed with the phase contrast imaging diagnostic and Mirnov coils during the sawtooth cycle in Alcator C-mod [M. Greenwald et al., Nucl. Fusion 45, S109 (2005)] plasmas with minority ion-cyclotron resonance heating. Both down-chirping RSAEs and up-chirping RSAEs have been observed during the sawtooth cycle. Experimental measurements of the spatial structure of the RSAEs are compared to theoretical models based on the code NOVA [C. Z. Cheng and M. S. Chance, J. Comput. Phys. 71, 124 (1987)] and used to derive constraints on the q profile. It is shown that the observed RSAEs can be understood by assuming a reversed shear q profile (up chirping) or a q profile with a local maximum (down chirping) with q approximate to 1. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3086869]
C1 [Edlund, E. M.; Porkolab, M.; Lin, L.; Lin, Y.; Wukitch, S. J.] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA.
[Kramer, G. J.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Edlund, EM (reprint author), MIT, Plasma Sci & Fus Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
RI Lin, Liang/H-2255-2011
NR 34
TC 7
Z9 7
U1 0
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056106
DI 10.1063/1.3086869
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600099
ER
PT J
AU Egedal, J
Daughton, W
Drake, JF
Katz, N
Le, A
AF Egedal, J.
Daughton, W.
Drake, J. F.
Katz, N.
Le, A.
TI Formation of a localized acceleration potential during magnetic
reconnection with a guide field
SO PHYSICS OF PLASMAS
LA English
DT Article
DE magnetic reconnection
ID PARTICLE-ACCELERATION; ISLANDS
AB Magnetic reconnection near the surface of the sun and in the Earth's magnetotail is associated with the production of highly energetic electrons. Direct acceleration in the reconnection electric field has been proposed as a possible mechanism for energizing these electrons. Here, however, we use kinetic simulations of guide-field reconnection to show that in two-dimensional (2D) reconnection the parallel electric field, E(parallel to) in the reconnection region is localized and its structure does not permit significant energization of the electrons. Rather, a large fraction of the electrons become trapped due to a sign reversal in E(parallel to), imposing strict constraints on their motions and energizations. Given these new results, simple 2D models, which invoke direct acceleration for energizing electrons during a single encounter with a reconnection region, need to be revised.
C1 [Egedal, J.; Katz, N.; Le, A.] MIT, Cambridge, MA 02139 USA.
[Drake, J. F.] Univ Maryland, College Pk, MD 20742 USA.
[Daughton, W.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Egedal, J (reprint author), MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
RI Daughton, William/L-9661-2013
FU DOE Junior Faculty [DE-FG02-06ER54878]
FX This work was funded in part by DOE Junior Faculty Grant No.
DE-FG02-06ER54878.
NR 16
TC 33
Z9 33
U1 2
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 050701
DI 10.1063/1.3130732
PG 4
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600001
ER
PT J
AU Ernst, DR
Lang, J
Nevins, WM
Hoffman, M
Chen, Y
Dorland, W
Parker, S
AF Ernst, D. R.
Lang, J.
Nevins, W. M.
Hoffman, M.
Chen, Y.
Dorland, W.
Parker, S.
TI Role of zonal flows in trapped electron mode turbulence through
nonlinear gyrokinetic particle and continuum simulation
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE plasma flow; plasma instability; plasma kinetic theory; plasma nonlinear
processes; plasma simulation; plasma turbulence
ID INTERNAL TRANSPORT BARRIER; ALCATOR-C-MOD; TOKAMAK; PLASMAS;
INSTABILITY; GENERATION; STABILITY
AB Trapped electron mode (TEM) turbulence exhibits a rich variety of collisional and zonal flow physics. This work explores the parametric variation of zonal flows and underlying mechanisms through a series of linear and nonlinear gyrokinetic simulations, using both particle-in-cell and continuum methods. A new stability diagram for electron modes is presented, identifying a critical boundary at eta(e)=1, separating long and short wavelength TEMs. A novel parity test is used to separate TEMs from electron temperature gradient driven modes. A nonlinear scan of eta(e) reveals fine scale structure for eta(e)greater than or similar to 1, consistent with linear expectation. For eta(e)< 1, zonal flows are the dominant saturation mechanism, and TEM transport is insensitive to eta(e). For eta(e)>1, zonal flows are weak, and TEM transport falls inversely with a power law in eta(e). The role of zonal flows appears to be connected to linear stability properties. Particle and continuum methods are compared in detail over a range of eta(e)=d ln T(e)/d ln n(e) values from zero to five. Linear growth rate spectra, transport fluxes, fluctuation wavelength spectra, zonal flow shearing spectra, and correlation lengths and times are in close agreement. In addition to identifying the critical parameter eta(e) for TEM zonal flows, this paper takes a challenging step in code verification, directly comparing very different methods of simulating simultaneous kinetic electron and ion dynamics in TEM turbulence.
C1 [Ernst, D. R.] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA.
[Lang, J.; Chen, Y.; Parker, S.] Univ Colorado, Ctr Integrated Plasma Studies, Boulder, CO 80309 USA.
[Nevins, W. M.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Hoffman, M.] Missouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 USA.
[Hoffman, M.] Missouri Univ Sci & Technol, Dept Nucl Engn, Rolla, MO 65409 USA.
[Dorland, W.] Univ Maryland, Inst Res Elect & Appl Phys, Dept Phys, College Pk, MD 20742 USA.
[Dorland, W.] Univ Maryland, Ctr Sci Computat & Math Modelling, College Pk, MD 20742 USA.
RP Ernst, DR (reprint author), MIT, Plasma Sci & Fus Ctr, 167 Albany St,NW16-258, Cambridge, MA 02139 USA.
EM dernst@psfc.mit.edu
RI Ernst, Darin/A-1487-2010; Dorland, William/B-4403-2009
OI Ernst, Darin/0000-0002-9577-2809; Dorland, William/0000-0003-2915-724X
NR 28
TC 29
Z9 29
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 055906
DI 10.1063/1.3116282
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600093
ER
PT J
AU Fournier, KB
Satcher, JH
May, MJ
Poco, JF
Sorce, CM
Colvin, JD
Hansen, SB
MacLaren, SA
Moon, SJ
Davis, JF
Girard, F
Villette, B
Primout, M
Babonneau, D
Coverdale, CA
Beutler, DE
AF Fournier, K. B.
Satcher, J. H.
May, M. J.
Poco, J. F.
Sorce, C. M.
Colvin, J. D.
Hansen, S. B.
MacLaren, S. A.
Moon, S. J.
Davis, J. F.
Girard, F.
Villette, B.
Primout, M.
Babonneau, D.
Coverdale, C. A.
Beutler, D. E.
TI Absolute x-ray yields from laser-irradiated germanium-doped low-density
aerogels
SO PHYSICS OF PLASMAS
LA English
DT Article
DE aerogels; electron density; plasma density; plasma heating by laser;
plasma instability; plasma X-ray sources
ID NATIONAL-IGNITION-FACILITY; CONVERSION EFFICIENCY; OMEGA LASER; PLASMAS;
SYSTEM; TARGETS
AB The x-ray yields from laser-irradiated germanium-doped ultra-low-density aerogel plasmas have been measured in the energy range from sub-keV to approximate to 15 keV at the OMEGA laser facility at the Laboratory for Laser Energetics, University of Rochester. The targets' x-ray yields have been studied for variation in target size, aerogel density, laser pulse length, and laser intensity. For targets that result in plasmas with electron densities in the range of approximate to 10% of the critical density for 3 omega light, one can expect 10-11 J/sr of x rays with energies above 9 keV, and 600-800 J/sr for energies below 3.5 keV. In addition to the x-ray spectral yields, the x-ray temporal waveforms have been measured and it is observed that the emitted x rays generally follow the delivered laser power, with late-time enhancements of emitted x-ray power correlated with hydrodynamic compression of the hot plasma. Further, the laser energy reflected from the target by plasma instabilities is found to be 2%-7% of the incident energy for individual beam intensities approximate to 10(14)-10(15) W/cm(2). The propagation of the laser heating in the target volume has been characterized with two-dimensional imaging. Source-region heating is seen to be correlated with the temporal profile of the emitted x-ray power.
C1 [Fournier, K. B.; Satcher, J. H.; May, M. J.; Poco, J. F.; Sorce, C. M.; Colvin, J. D.; Hansen, S. B.; MacLaren, S. A.; Moon, S. J.; Davis, J. F.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Girard, F.; Villette, B.; Primout, M.; Babonneau, D.] CEA DAM, F-91297 Ile De France, Arpajon, France.
[Coverdale, C. A.; Beutler, D. E.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Davis, J. F.] Alme & Associates, Alexandria, VA 22303 USA.
RP Fournier, KB (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM fournier2@llnl.gov; JDavis@aol.com; frederic.girard@cea.fr;
bruno.villette@cea.fr; cacover@sandia.gov
FU U.S. Department of Energy [DE-AC52-07NA27344, DE-AC049-4AL8500]; Defense
Threat Redution Agency
FX The authors would like to thank the entire crew at the OMEGA laser for
their expert operation of the laser and help setting up these
experiments. This work performed under the auspices of the U.S.
Department of Energy by Lawrence Livermore National Laboratory under
Contract No. DE-AC52-07NA27344. Sandia is a multiprogram laboratory
operated by Sandia Corporation, a Lockheed Martin Company, for the U. S.
Department of Energy under Contract No. DE-AC049-4AL8500. This work was
also supported by the Defense Threat Redution Agency under the IACROs
"Laser Plasma Radiation Source Development and Evaluation," "Studies of
Phenomenology of Radiation Effects Science Using Laser Plasma Radiation
Sources," and "Research Program for Cold X-Ray Testing Using Laser
Plasma Radiation Sources."
NR 35
TC 34
Z9 34
U1 1
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 052703
DI 10.1063/1.3140041
PG 13
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600042
ER
PT J
AU Garofalo, AM
Solomon, WM
Lanctot, M
Burrell, KH
DeBoo, JC
deGrassie, JS
Jackson, GL
Park, JK
Reimerdes, H
Schaffer, MJ
Strait, EJ
AF Garofalo, A. M.
Solomon, W. M.
Lanctot, M.
Burrell, K. H.
DeBoo, J. C.
deGrassie, J. S.
Jackson, G. L.
Park, J. -K.
Reimerdes, H.
Schaffer, M. J.
Strait, E. J.
TI Plasma rotation driven by static nonresonant magnetic fields
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE plasma density; plasma flow; plasma temperature; Tokamak devices
ID TOROIDAL-MOMENTUM DISSIPATION; RESISTIVE WALL MODES; NEOCLASSICAL
TRANSPORT; POLOIDAL ROTATION; TOKAMAK PLASMA; ASPECT RATIO; HIGH-BETA;
DIII-D; CONFINEMENT; STABILIZATION
AB Recent experiments in high temperature DIII-D tokamak [J. L. Luxon, Nucl. Fusion 42, 64 (2002)] plasmas reported the first observation of plasma acceleration driven by the application of static nonresonant magnetic fields (NRMFs), with resulting improvement in the global energy confinement time. Although the braking effect of static magnetic field asymmetries is well known, recent theory [A. J. Cole , Phys. Rev. Lett. 99, 065001 (2007)] predicts that in some circumstances they lead instead to an increase in rotation frequency toward a "neoclassical offset" rate in a direction opposed to the plasma current. We report the first experimental confirmation of this surprising result. The measured NRMF torque shows a strong dependence on both plasma density and temperature, above expectations from neoclassical theory. The consistency between theory and experiment improves with modifications to the expression of the NRMF torque accounting for a significant role of the plasma response to the external field and for the beta dependence of the plasma response, although some discrepancy remains. The magnitude and direction of the observed offset rotation associated with the NRMF torque are consistent with neoclassical theory predictions. The offset rotation rate is about 1% of the Alfven frequency or more than double the rotation needed for stable operation at high beta(N) above the n=1 no-wall kink limit in DIII-D.
C1 [Garofalo, A. M.; Burrell, K. H.; DeBoo, J. C.; deGrassie, J. S.; Jackson, G. L.; Schaffer, M. J.; Strait, E. J.] Gen Atom Co, San Diego, CA 92186 USA.
[Lanctot, M.; Reimerdes, H.] Columbia Univ, New York, NY 10027 USA.
[Solomon, W. M.; Park, J. -K.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Garofalo, AM (reprint author), Gen Atom Co, POB 85608, San Diego, CA 92186 USA.
RI Lanctot, Matthew J/O-4979-2016;
OI Lanctot, Matthew J/0000-0002-7396-3372; Solomon,
Wayne/0000-0002-0902-9876
NR 32
TC 29
Z9 29
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056119
DI 10.1063/1.3129164
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600112
ER
PT J
AU Girard, F
Primout, M
Villette, B
Stemmler, P
Jacquet, L
Babonneau, D
Fournier, KB
AF Girard, F.
Primout, M.
Villette, B.
Stemmler, Ph.
Jacquet, L.
Babonneau, D.
Fournier, K. B.
TI Titanium and germanium lined hohlraums and halfraums as multi-keV x-ray
radiators
SO PHYSICS OF PLASMAS
LA English
DT Article
DE plasma confinement; plasma production by laser; plasma X-ray sources
ID NATIONAL-IGNITION-FACILITY; LASER-PRODUCED PLASMAS; CONVERSION
EFFICIENCY; ENERGY-LEVELS
AB As multi-keV x-ray radiators, hohlraums and halfraums with inner walls coated with metallic materials (called liner) have been tested for the first time with laser as the energy drive. For titanium, conversion efficiencies (CEs) are up to similar to 14% for emission into 4 pi, integrating between 4.6 and 6.5 keV when a large diameter hohlraum is used. Germanium CE is similar to 0.8% into 4 pi between 9 and 13 keV. The highest CEs have been obtained with a 1 ns squared pulse and phase plates giving laser absorption near 99%. These high CEs are due to long-lasting, good plasma conditions for multi-keV x-ray production maintained by plasma confinement inside the plastic cylinder and plasma collision leading to a burst of x rays at a time that depends on target size. As photon emitters at 4.7 keV, titanium-lined hohlraums are the most efficient solid targets and data are close to CEs for gas targets, which are considered as the upper limit for x-ray yields since their low density allows good laser absorption and low kinetics losses. As 10.3 keV x-ray emitters, exploded germanium foils give best results one order of magnitude more efficient than thick targets; doped aerogels and lined hohlraums give similar yields, about three times lower than those from exploded foils.
C1 [Girard, F.; Primout, M.; Villette, B.; Stemmler, Ph.; Jacquet, L.; Babonneau, D.] DIF, DAM, CEA, F-91297 Arpajon, France.
[Fournier, K. B.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Girard, F (reprint author), DIF, DAM, CEA, F-91297 Arpajon, France.
NR 36
TC 25
Z9 26
U1 0
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 052704
DI 10.1063/1.3130263
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600043
ER
PT J
AU Gorelenkov, NN
Van Zeeland, MA
Berk, HL
Crocker, NA
Darrow, D
Fredrickson, E
Fu, GY
Heidbrink, WW
Menard, J
Nazikian, R
AF Gorelenkov, N. N.
Van Zeeland, M. A.
Berk, H. L.
Crocker, N. A.
Darrow, D.
Fredrickson, E.
Fu, G. -Y.
Heidbrink, W. W.
Menard, J.
Nazikian, R.
TI Beta-induced Alfven-acoustic eigenmodes in National Spherical Torus
Experiment and DIII-D driven by beam ions
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE dispersion relations; eigenvalues and eigenfunctions; plasma Alfven
waves; plasma instability; plasma kinetic theory; plasma toroidal
confinement; Tokamak devices
ID TOROIDAL PLASMAS; D TOKAMAK; KINETIC-THEORY; MODES; INSTABILITIES;
PREDICTIONS; WAVES; FLOWS; JET
AB Kinetic theory and experimental observations of a special class of energetic particle driven instabilities called here beta-induced Alfven-acoustic eigenmodes (BAAEs) are reported confirming, previous results [N. N. Gorelenkov , Plasma Phys. Controlled Fusion 49, B371 (2007)]. The kinetic theory is based on the ballooning dispersion relation where the drift frequency effects are retained. BAAE gaps are recovered in kinetic theory. It is shown that the observed certain low-frequency instabilities on DIII-D [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] and National Spherical Torus Experiment [M. Ono, S. M. Kaye, Y.-K. M. Peng , Nucl. Fusion 40, 557 (2000)] are consistent with their identification as BAAEs. BAAEs deteriorate the fast ion confinement in DIII-D and can have a similar effect in next-step fusion plasmas, especially if excited together with multiple global toroidicity-induced shear Alfven eigenmode instabilities. BAAEs can also be used to diagnose safety factor profiles, a technique known as magnetohydrodynamic spectroscopy.
C1 [Gorelenkov, N. N.; Darrow, D.; Fredrickson, E.; Fu, G. -Y.; Menard, J.; Nazikian, R.] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Van Zeeland, M. A.] Gen Atom Co, San Diego, CA 92186 USA.
[Berk, H. L.] Univ Texas Austin, Inst Fus Studies, Austin, TX 78712 USA.
[Crocker, N. A.] Univ Calif Los Angeles, Inst Plasma & Fus Res, Los Angeles, CA 90095 USA.
[Heidbrink, W. W.] Univ Calif Irvine, Irvine, CA 92697 USA.
RP Gorelenkov, NN (reprint author), Princeton Univ, Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM ngorelen@pppl.gov
OI Menard, Jonathan/0000-0003-1292-3286
NR 28
TC 41
Z9 44
U1 0
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056107
DI 10.1063/1.3097920
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600100
ER
PT J
AU Herrmann, HW
Langenbrunner, JR
Mack, JM
Cooley, JH
Wilson, DC
Evans, SC
Sedillo, TJ
Kyrala, GA
Caldwell, SE
Young, CS
Nobile, A
Wermer, J
Paglieri, S
McEvoy, AM
Kim, Y
Batha, SH
Horsfield, CJ
Drew, D
Garbett, W
Rubery, M
Glebov, VY
Roberts, S
Frenje, JA
AF Herrmann, H. W.
Langenbrunner, J. R.
Mack, J. M.
Cooley, J. H.
Wilson, D. C.
Evans, S. C.
Sedillo, T. J.
Kyrala, G. A.
Caldwell, S. E.
Young, C. S.
Nobile, A.
Wermer, J.
Paglieri, S.
McEvoy, A. M.
Kim, Y.
Batha, S. H.
Horsfield, C. J.
Drew, D.
Garbett, W.
Rubery, M.
Glebov, V. Yu.
Roberts, S.
Frenje, J. A.
TI Anomalous yield reduction in direct-drive deuterium/tritium implosions
due to He-3 addition
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY NOV 17-21, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE explosions; helium; plasma inertial confinement; plasma production;
plasma shock waves
ID BURN HISTORY; FUSION; GAMMA; DETECTORS; TARGETS; ENERGY; OMEGA
AB Glass capsules were imploded in direct drive on the OMEGA laser [Boehly , Opt. Commun. 133, 495 (1997)] to look for anomalous degradation in deuterium/tritium (DT) yield and changes in reaction history with He-3 addition. Such anomalies have previously been reported for D/He-3 plasmas but had not yet been investigated for DT/He-3. Anomalies such as these provide fertile ground for furthering our physics understanding of inertial confinement fusion implosions and capsule performance. Anomalous degradation in the compression component of yield was observed, consistent with the "factor of 2" degradation previously reported by Massachusetts Institute of Technology (MIT) at a 50% He-3 atom fraction in D-2 using plastic capsules [Rygg, Phys. Plasmas 13, 052702 (2006)]. However, clean calculations (i.e., no fuel-shell mixing) predict the shock component of yield quite well, contrary to the result reported by MIT but consistent with Los Alamos National Laboratory results in D-2/He-3 [Wilson , J. Phys.: Conf. Ser. 112, 022015 (2008)]. X-ray imaging suggests less-than-predicted compression of capsules containing He-3. Leading candidate explanations are poorly understood equation of state for gas mixtures and unanticipated particle pressure variation with increasing He-3 addition.
C1 [Herrmann, H. W.; Langenbrunner, J. R.; Mack, J. M.; Cooley, J. H.; Wilson, D. C.; Evans, S. C.; Sedillo, T. J.; Kyrala, G. A.; Caldwell, S. E.; Young, C. S.; Nobile, A.; Wermer, J.; Paglieri, S.; McEvoy, A. M.; Kim, Y.; Batha, S. H.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Horsfield, C. J.; Drew, D.; Garbett, W.; Rubery, M.] Atom Weap Estab, Aldermaston RG7 4PR, England.
[Glebov, V. Yu.; Roberts, S.] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA.
[Frenje, J. A.] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA.
RP Herrmann, HW (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM herrmann@lanl.gov
NR 20
TC 23
Z9 23
U1 0
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056312
DI 10.1063/1.3141062
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600125
ER
PT J
AU Holcomb, CT
Ferron, JR
Luce, TC
Petrie, TW
Politzer, PA
Challis, C
DeBoo, JC
Doyle, EJ
Greenfield, CM
Groebner, RJ
Groth, M
Hyatt, AW
Jackson, GL
Kessel, C
La Haye, RJ
Makowski, MA
McKee, GR
Murakami, M
Osborne, TH
Park, JM
Prater, R
Porter, GD
Reimerdes, H
Rhodes, TL
Shafer, MW
Snyder, PB
Turnbull, AD
West, WP
AF Holcomb, C. T.
Ferron, J. R.
Luce, T. C.
Petrie, T. W.
Politzer, P. A.
Challis, C.
DeBoo, J. C.
Doyle, E. J.
Greenfield, C. M.
Groebner, R. J.
Groth, M.
Hyatt, A. W.
Jackson, G. L.
Kessel, C.
La Haye, R. J.
Makowski, M. A.
McKee, G. R.
Murakami, M.
Osborne, T. H.
Park, J. -M.
Prater, R.
Porter, G. D.
Reimerdes, H.
Rhodes, T. L.
Shafer, M. W.
Snyder, P. B.
Turnbull, A. D.
West, W. P.
TI Optimizing stability, transport, and divertor operation through plasma
shaping for steady-state scenario development in DIII-D
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE plasma density; plasma instability; plasma magnetohydrodynamics; plasma
toroidal confinement; plasma transport processes; Tokamak devices
ID H-MODE PEDESTAL; D TOKAMAK; CONFINEMENT; INJECTION; EDGE; CODE
AB Recent studies on the DIII-D tokamak [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] have elucidated key aspects of the dependence of stability, confinement, and density control on the plasma magnetic configuration, leading to the demonstration of nearly noninductive operation for >1 s with pressure 30% above the ideal no-wall stability limit. Achieving fully noninductive tokamak operation requires high pressure, good confinement, and density control through divertor pumping. Plasma geometry affects all of these. Ideal magnetohydrodynamics modeling of external kink stability suggests that it may be optimized by adjusting the shape parameter known as squareness (zeta). Optimizing kink stability leads to an increase in the maximum stable pressure. Experiments confirm that stability varies strongly with zeta, in agreement with the modeling. Optimization of kink stability via zeta is concurrent with an increase in the H-mode edge pressure pedestal stability. Global energy confinement is optimized at the lowest zeta tested, with increased pedestal pressure and lower core transport. Adjusting the magnetic divertor balance about a double-null configuration optimizes density control for improved noninductive auxiliary current drive. The best density control is obtained with a slight imbalance toward the divertor opposite the ion grad(B) drift direction, consistent with modeling of these effects. These optimizations have been combined to achieve noninductive current fractions near unity for over 1 s with normalized pressure of 3.5 65%, and a normalized confinement factor of H(98(y,2))approximate to 1.5.
C1 [Holcomb, C. T.; Groth, M.; Makowski, M. A.; Porter, G. D.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Ferron, J. R.; Luce, T. C.; Petrie, T. W.; Politzer, P. A.; DeBoo, J. C.; Greenfield, C. M.; Groebner, R. J.; Hyatt, A. W.; Jackson, G. L.; La Haye, R. J.; Osborne, T. H.; Prater, R.; Snyder, P. B.; Turnbull, A. D.; West, W. P.] Gen Atom Co, San Diego, CA 92186 USA.
[Challis, C.] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England.
[Doyle, E. J.; Rhodes, T. L.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
[Kessel, C.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[McKee, G. R.; Shafer, M. W.] Univ Wisconsin, Madison, WI 53706 USA.
[Murakami, M.; Park, J. -M.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Reimerdes, H.] Columbia Univ, New York, NY 10027 USA.
RP Holcomb, CT (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RI Groth, Mathias/G-2227-2013
NR 44
TC 25
Z9 25
U1 0
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056116
DI 10.1063/1.3125934
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600109
ER
PT J
AU Hooper, EB
Romero-Talamas, CA
LoDestro, LL
Wood, RD
McLean, HS
AF Hooper, E. B.
Romero-Talamas, C. A.
LoDestro, L. L.
Wood, R. D.
McLean, H. S.
TI Aspect-ratio effects in the driven, flux-core spheromak
SO PHYSICS OF PLASMAS
LA English
DT Article
DE magnetic reconnection; plasma instability; plasma magnetohydrodynamics;
plasma simulation; plasma toroidal confinement; stochastic processes
ID TILTING INSTABILITY; HELICITY INJECTION; MAGNETIC HELICITY; SPHEX
SPHEROMAK; GUN-DRIVEN; SUSTAINMENT; RELAXATION; PLASMA
AB Resistive magnetohydrodynamic simulations are used to evaluate the effects of the aspect ratio A (length to radius ratio) in a spheromak driven by coaxial helicity injection. The simulations are benchmarked against the Sustained Spheromak Physics Experiment (SSPX) [R. D. Wood , Nucl. Fusion 45, 1582 (2005)]. Amplification of the bias ("gun") poloidal flux is fitted well by a linear dependence (insensitive to A) on the ratio of gun current and bias flux above a threshold dependent on A. For low flux amplifications in the simulations, the n=1 mode is coherent and the mean-field geometry looks like a tilted spheromak. Because the mode has relatively large amplitude the field lines are open everywhere, allowing helicity penetration. Strongly driven helicity injection at A <= 1.4 in simulations generates reconnection events which generate cathode-voltage spikes, relaxation of the symmetry-breaking modes, and open, stochastic magnetic field lines; this state is characteristic of SSPX. The time sequences of these events suggest that they are representative of a chaotic process. Near the spheromak tilt-mode limit, A approximate to 1.67 for a cylindrical flux conserver, the tilt approaches 90 degrees; reconnection events are not generated up to the strongest drives simulated. Implications for spheromak experiments are discussed.
C1 [Hooper, E. B.; Romero-Talamas, C. A.; LoDestro, L. L.; Wood, R. D.; McLean, H. S.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Hooper, EB (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA.
EM hooper1@llnl.gov
FU Department of Energy [DE-AC03-76SF00098]; U.S. Department of Energy
[W7405-ENG-48, DE-AC5207NA27344]
FX We thank the SSPX experimental team for their extensive efforts during
the operation of the experiments. Stimulating discussions with B. I.
Cohen are gratefully acknowledged, as is C. R. Sovinec's help with the
NIMROD code and spheromak physics, in general. The visualization in this
work was made possible by the help of Brian Nelson at the PSI Center,
University of Washington, who prepared the python code scripts which
converted the NIMROD output into the proper format for VISIT. Brad
Whitlock of LLNL provided much-needed consulting guidance on the use of
VISIT, and W. H. Meyer of LLNL installed and debugged the code on a
local computer system and provided important support as needed. The
simulations made use of resources at the National Energy Research
Supercomputer Center under Department of Energy Contract No.
DE-AC03-76SF00098. The work was performed under the auspices of the U.S.
Department of Energy by Lawrence Livermore National Laboratory under
Contract Nos. W7405-ENG-48 and DE-AC5207NA27344.
NR 29
TC 1
Z9 1
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 052506
DI 10.1063/1.3134064
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600031
ER
PT J
AU Hurricane, OA
Hansen, JF
Robey, HF
Remington, BA
Bono, MJ
Harding, EC
Drake, RP
Kuranz, CC
AF Hurricane, O. A.
Hansen, J. F.
Robey, H. F.
Remington, B. A.
Bono, M. J.
Harding, E. C.
Drake, R. P.
Kuranz, C. C.
TI A high energy density shock driven Kelvin-Helmholtz shear layer
experiment
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE bubbles; flow instability; plasma flow; plasma instability; plasma shock
waves; plasma turbulence; supersonic flow; vortices
ID EXPERIMENTAL ASTROPHYSICS; SUPERNOVA HYDRODYNAMICS; LASER;
INSTABILITIES; SIMULATION; PLASMAS; SYSTEM; MIX
AB Radiographic data from a novel and highly successful high energy density Kelvin-Helmholtz (KH) instability experiment is presented along with synapses of the theory and simulation behind the target design. Data on instability growth are compared to predictions from simulation and theory. The key role played by baroclinic vorticity production in the functioning of the target and the key design parameters are also discussed. The data show the complete evolution of large distinct KH eddies, from formation to turbulent break-up. Unexpectedly, low density bubbles comparable to the vortex size are observed forming in the free-stream region above each vortex at late time. These bubbles have the appearance of localized shocks, possibly supporting a theoretical fluid dynamics conjecture about the existence of supersonic bubbles over the vortical structure [transonic convective Mach numbers, D. Papamoschou and A. Roshko, J. Fluid Mech. 197, 453 (1988)] that support localized shocks (shocklets) not extending into the free stream (P. E. Dimotakis, Proceedings of the 22nd Fluid Dynamics, Plasma Dynamics and Lasers Conference, 1991, Paper No. AIAA 91-1724). However, it is also possible that these low density bubbles are the result of a cavitationlike effect. Hypothesis that may explain the appearance of low density bubbles will be discussed.
C1 [Hurricane, O. A.; Hansen, J. F.; Robey, H. F.; Remington, B. A.; Bono, M. J.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Harding, E. C.; Drake, R. P.; Kuranz, C. C.] Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA.
RP Hurricane, OA (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA.
EM hurricane1@llnl.gov
OI Drake, R Paul/0000-0002-5450-9844
NR 35
TC 28
Z9 28
U1 2
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056305
DI 10.1063/1.3096790
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600118
ER
PT J
AU Joseph, I
AF Joseph, Ilon
TI Driving toroidally asymmetric current through the tokamak scrape-off
layer. II. Magnetic field structure and spectrum
SO PHYSICS OF PLASMAS
LA English
DT Article
DE fusion reactor divertors; fusion reactor theory; plasma boundary layers;
plasma instability; plasma magnetohydrodynamics; plasma toroidal
confinement; plasma transport processes; Tokamak devices
ID PEELING-BALLOONING MODES; DIII-D; PLASMA CONVECTION; DIVERTOR;
PERTURBATIONS; TRANSPORT; DISCHARGES; STABILITY; SURFACES; ITER
AB The structure of the magnetic field perturbations due to nonaxisymmetric field-aligned currents in the tokamak scrape-off layer (SOL) are analytically calculated near the X-point. Paper I [I. Joseph , Phys. Plasmas 16, 052510 (2009)] demonstrated that biasing divertor target plates in a toroidally asymmetric fashion can generate an appreciable toroidally asymmetric parallel current density in the SOL along the separatrix. Here, the magnetic field perturbation caused by a SOL current channel of finite width and stepwise constant amplitude at the target plate is derived. Flux expansion amplifies the magnetic perturbation near the X-point, while phase interference causes the SOL amplitude to be reduced at large toroidal mode number. Far enough from the current channel, the magnetic field can be approximated as arising from a surface current near the separatrix with differing amplitudes in the SOL and the divertor leg. The perturbation spectrum and resonant components of this field are computed analytically asymptotically close to the separatrix in magnetic flux coordinates. The size of the stochastic layer due to the applied perturbation that would result without self-consistent plasma shielding is also estimated. If enough resonant field is generated, control of the edge pressure gradient may allow stabilization of edge localized modes.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Joseph, I (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94551 USA.
EM joseph5@llnl.gov
NR 34
TC 5
Z9 5
U1 1
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 052511
DI 10.1063/1.3134584
PG 15
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600036
ER
PT J
AU Joseph, I
Cohen, RH
Ryutov, DD
AF Joseph, Ilon
Cohen, Ronald H.
Ryutov, Dmitri D.
TI Driving toroidally asymmetric current through the tokamak scrape-off
layer. I. Potential for edge localized mode suppression
SO PHYSICS OF PLASMAS
LA English
DT Article
DE plasma boundary layers; plasma density; plasma instability; plasma
magnetohydrodynamics; plasma simulation; plasma toroidal confinement;
plasma transport processes; Tokamak devices
ID RESONANT MAGNETIC PERTURBATIONS; PEELING-BALLOONING MODES; DIII-D
TOKAMAK; PLASMA CONVECTION; PARTICLE CONTROL; CHAPTER 4; DIVERTOR;
STABILITY; PHYSICS; TRANSPORT
AB A potential technique for suppressing edge localized modes is theoretically analyzed. Recent experiments have shown that externally generated resonant magnetic perturbations (RMPs) can stabilize edge localized modes (ELMs) by modifying the density profile [T. E. Evans , Nat. Phys. 2, 419 (2006); Y. Liang , Phys. Rev. Lett. 98, 265004 (2007)]. Driving toroidally asymmetric current internally through the scrape-off layer (SOL) plasma itself can also generate RMPs that are close to the required threshold for ELM control. Ion saturation current densities can be achieved by producing potential differences on the order of the electron temperature. Although the threshold is uncertain in future devices, if driven coherently through the SOL, the upper limit for the resulting perturbation field would exceed the present experimental threshold. This analysis provides the tools required for estimating the magnitude of the coherent SOL current and RMP generated via toroidally asymmetric biasing of the target. Flux expansion increases the perturbation near the X-point, while phase interference due to the shearing of field lines near the X-point reduces the amplitude of the effective SOL perturbation and makes the result sensitive to both toroidal mode number n and the phasing at the target plate. If the current density driven at the target plate decays radially, the amplitude over the useful coherence width of the current profile will be reduced. The RMP can still exceed the present threshold at low n if the radial location and width of the biasing region are optimally chosen.
C1 [Joseph, Ilon; Cohen, Ronald H.; Ryutov, Dmitri D.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Joseph, I (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94551 USA.
EM joseph5@llnl.gov
FU U.S. Department of Energy at Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]
FX The authors would like to thank T. D. Rognlien for providing access to
UEDGE divertor physics modeling results for ITER and for valuable
discussions that led to great improvements in the manuscript. We would
also like to thank the referee for valuable suggestions that contributed
to improving the clarity and content of the paper and for urging us to
treat the effects of phase interference more completely. This work was
performed under the auspices of the U.S. Department of Energy at
Lawrence Livermore National Laboratory under Contract No.
DE-AC52-07NA27344.
NR 50
TC 7
Z9 7
U1 1
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 052510
DI 10.1063/1.3134580
PG 14
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600035
ER
PT J
AU Kritcher, AL
Neumayer, P
Castor, J
Doppner, T
Falcone, RW
Landen, OL
Lee, HJ
Lee, RW
Holst, B
Redmer, R
Morse, EC
Ng, A
Pollaine, S
Price, D
Glenzer, SH
AF Kritcher, A. L.
Neumayer, P.
Castor, J.
Doeppner, T.
Falcone, R. W.
Landen, O. L.
Lee, H. J.
Lee, R. W.
Holst, B.
Redmer, R.
Morse, E. C.
Ng, A.
Pollaine, S.
Price, D.
Glenzer, S. H.
TI Ultrafast K alpha x-ray Thomson scattering from shock compressed lithium
hydride
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE heating; lithium compounds; plasmons; shock wave effects; Thomson
effect; X-ray scattering
ID NATIONAL-IGNITION-FACILITY; EQUATION-OF-STATE; DENSE-PLASMAS;
HIGH-PRESSURE; LASER; LIQUID; PHOTOABSORPTION; TEMPERATURE; DEUTERIUM;
HYDROGEN
AB Spectrally and temporally resolved x-ray Thomson scattering using ultrafast Ti K alpha x rays has provided experimental validation for modeling of the compression and heating of shocked matter. The coalescence of two shocks launched into a solid density LiH target by a shaped 6 ns heater beam was observed from rapid heating to temperatures of 2.2 eV, enabling tests of shock timing models. Here, the temperature evolution of the target at various times during shock progression was characterized from the intensity of the elastic scattering component. The observation of scattering from plasmons, electron plasma oscillations, at shock coalescence indicates a transition to a dense metallic plasma state in LiH. From the frequency shift of the measured plasmon feature the electron density was directly determined with high accuracy, providing a material compression of a factor of 3 times solid density. The quality of data achieved in these experiments demonstrates the capability for single shot dynamic characterization of dense shock compressed matter. The conditions probed in this experiment are relevant for the study of the physics of planetary formation and to characterize inertial confinement fusion targets for experiments such as on the National Ignition Facility, Lawrence Livermore National Laboratory.
C1 [Kritcher, A. L.; Neumayer, P.; Castor, J.; Doeppner, T.; Landen, O. L.; Lee, R. W.; Ng, A.; Pollaine, S.; Price, D.; Glenzer, S. H.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Kritcher, A. L.; Morse, E. C.] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94709 USA.
[Falcone, R. W.; Lee, H. J.; Lee, R. W.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94709 USA.
[Holst, B.; Redmer, R.] Univ Rostock, Inst Phys, D-18051 Rostock, Germany.
RP Kritcher, AL (reprint author), Lawrence Livermore Natl Lab, L-399,POB 808, Livermore, CA 94551 USA.
RI Holst, Bastian/D-2217-2011; Redmer, Ronald/F-3046-2013
OI Holst, Bastian/0000-0002-2369-3730;
NR 44
TC 6
Z9 6
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056308
DI 10.1063/1.3099316
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600121
ER
PT J
AU Krstic, PS
Schultz, DR
AF Krstic, P. S.
Schultz, D. R.
TI Mean free paths and elastic and related transport cross sections for
neutrals and singly charged ions of Li, Be, and B in hydrogen plasmas
SO PHYSICS OF PLASMAS
LA English
DT Article
DE plasma
ID SLOW COLLISIONS; 1ST WALL; TOKAMAK; SCATTERING; MOLECULES; COATINGS;
RELEVANT; DIVERTOR; EDGE
AB The mean free paths are computed from the momentum transfer cross sections associated with collisions of protons with Li, Be, and B and for Li, Li+, Be+, and B+ colliding with atomic hydrogen, for center of mass energies between 0.0001 and 10 000 eV. The elastic and viscosity cross sections are also calculated for these collision systems. A fully quantum mechanical approach has been used up to 100 eV along with a more approximate, quasiclassical method between similar to 0.1 and 10 000 eV.
C1 [Krstic, P. S.; Schultz, D. R.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RP Krstic, PS (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
FU U.S. Department of Energy; Office of Fusion Energy Sciences, through Oak
Ridge National Laboratory [DE-AC05-00OR22725]
FX This work was supported by the U.S. Department of Energy, Office of
Fusion Energy Sciences, through Oak Ridge National Laboratory which is
managed by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725.
NR 31
TC 9
Z9 9
U1 0
U2 10
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 053503
DI 10.1063/1.3126549
PG 6
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600057
ER
PT J
AU Kuranz, CC
Drake, RP
Grosskopf, MJ
Budde, A
Krauland, C
Marion, DC
Visco, AJ
Ditmar, JR
Robey, HF
Remington, BA
Miles, AR
Cooper, ABR
Sorce, C
Plewa, T
Hearn, NC
Killebrew, KL
Knauer, JP
Arnett, D
Donajkowski, T
AF Kuranz, C. C.
Drake, R. P.
Grosskopf, M. J.
Budde, A.
Krauland, C.
Marion, D. C.
Visco, A. J.
Ditmar, J. R.
Robey, H. F.
Remington, B. A.
Miles, A. R.
Cooper, A. B. R.
Sorce, C.
Plewa, T.
Hearn, N. C.
Killebrew, K. L.
Knauer, J. P.
Arnett, D.
Donajkowski, T.
TI Three-dimensional blast-wave-driven Rayleigh-Taylor instability and the
effects of long-wavelength modes
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY NOV 17-21, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE explosions; helium; hydrogen; plasma production by laser; plasma shock
waves; plasma simulation; Rayleigh-Taylor instability
ID 2-DIMENSIONAL SIMULATIONS; HYDRODYNAMICS CODE; SUPERNOVA-REMNANTS; EARLY
EVOLUTION; LIGHT-CURVE; SN-1987A; GROWTH; ASTROPHYSICS; SYSTEM; LASERS
AB This paper describes experiments exploring the three-dimensional (3D) Rayleigh-Taylor instability at a blast-wave-driven interface. This experiment is well scaled to the He/H interface during the explosion phase of SN1987A. In the experiments, similar to 5 kJ of energy from the Omega laser was used to create a planar blast wave in a plastic disk, which is accelerated into a lower-density foam. These circumstances induce the Richtmyer-Meshkov instability and, after the shock passes the interface, the system quickly becomes dominated by the Rayleigh-Taylor instability. The plastic disk has an intentional pattern machined at the plastic/foam interface. This perturbation is 3D with a basic structure of two orthogonal sine waves with a wavelength of 71 mu m and an amplitude of 2.5 mu m. Additional long-wavelength modes with a wavelength of either 212 or 424 mu m are added onto the single-mode pattern. The addition of the long-wavelength modes was motivated by the results of previous experiments where material penetrated unexpectedly to the shock front, perhaps due to an unintended structure. The current experiments and simulations were performed to explore the effects of this unintended structure; however, we were unable to reproduce the previous results.
C1 [Kuranz, C. C.; Drake, R. P.; Grosskopf, M. J.; Budde, A.; Krauland, C.; Marion, D. C.; Visco, A. J.; Ditmar, J. R.] Univ Michigan, Ann Arbor, MI 48109 USA.
[Robey, H. F.; Remington, B. A.; Miles, A. R.; Cooper, A. B. R.; Sorce, C.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Plewa, T.] Florida State Univ, Dept Comp Sci, Tallahassee, FL 32306 USA.
[Hearn, N. C.] Univ Chicago, ASC Flash Ctr, Chicago, IL 60637 USA.
[Killebrew, K. L.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Knauer, J. P.] Univ Rochester, Laser Energet Lab, Rochester, NY USA.
[Arnett, D.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
[Donajkowski, T.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Kuranz, CC (reprint author), Univ Michigan, Ann Arbor, MI 48109 USA.
RI Plewa, Tomasz/C-1470-2010;
OI Plewa, Tomasz/0000-0002-1762-2565; Drake, R Paul/0000-0002-5450-9844
NR 43
TC 18
Z9 19
U1 1
U2 13
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056310
DI 10.1063/1.3099320
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600123
ER
PT J
AU Lei, AL
Tanaka, KA
Kodama, R
Adumi, K
Habara, H
Kitagawa, Y
Kondo, K
Matsuoka, T
Tanimoto, T
Yabuuchi, T
Mima, K
Nagai, K
Nagatomo, H
Norimatsu, T
Sawai, K
Suzuki, K
Yu, W
Xu, H
Yang, XQ
Cao, LH
Cai, HB
Sentoku, Y
Pukhov, A
Kumar, R
Snavely, R
Freeman, R
Yu, M
Zheng, J
AF Lei, A. L.
Tanaka, K. A.
Kodama, R.
Adumi, K.
Habara, H.
Kitagawa, Y.
Kondo, K.
Matsuoka, T.
Tanimoto, T.
Yabuuchi, T.
Mima, K.
Nagai, K.
Nagatomo, H.
Norimatsu, T.
Sawai, K.
Suzuki, K.
Yu, Wei
Xu, Han
Yang, X. Q.
Cao, L. H.
Cai, H. B.
Sentoku, Y.
Pukhov, A.
Kumar, R.
Snavely, R.
Freeman, R.
Yu, Min
Zheng, J.
TI Study of ultraintense laser propagation in overdense plasmas for fast
ignition
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE electron beams; laser fusion; plasma heating by laser; plasma light
propagation; plasma simulation; relativistic plasmas
ID UNDERDENSE; PULSES; OSAKA
AB Laser plasma interactions in a relativistic regime relevant to the fast ignition in inertial confinement fusion have been investigated. Ultraintense laser propagation in preformed plasmas and hot electron generation are studied. The experiments are performed using a 100 TW 0.6 ps laser and a 20 TW 0.6 ps laser synchronized by a long pulse laser. In the study, a self-focused ultraintense laser beam propagates along its axis into an overdense plasma with peak density 10(22)/cm(3). Channel formation in the plasma is observed. The laser transmission in the overdense plasma depends on the position of its focus and can take place in plasmas with peak densities as high as 5x10(22)/cm(3). The hot electron beams produced by the laser-plasma interaction have a divergence angle of similar to 30 degrees, which is smaller than that from laser-solid interactions. For deeper penetration of the laser light into the plasma, the use of multiple short pulse lasers is proposed. The latter scheme is investigated using particle-in-cell simulation. It is found that when the pulse duration and the interval between the pulses are appropriate, the laser pulse train can channel into the plasma deeper than a single longer pulse laser of similar peak intensity and total energy.
C1 [Lei, A. L.; Yu, Wei; Xu, Han; Yang, X. Q.] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China.
[Lei, A. L.; Tanaka, K. A.; Kodama, R.; Adumi, K.; Habara, H.; Kitagawa, Y.; Kondo, K.; Matsuoka, T.; Tanimoto, T.; Yabuuchi, T.] Osaka Univ, Grad Sch Engn, Suita, Osaka 5650871, Japan.
[Lei, A. L.; Tanaka, K. A.; Kodama, R.; Adumi, K.; Habara, H.; Kitagawa, Y.; Kondo, K.; Matsuoka, T.; Tanimoto, T.; Yabuuchi, T.; Mima, K.; Nagai, K.; Nagatomo, H.; Norimatsu, T.; Sawai, K.; Suzuki, K.; Cai, H. B.] Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan.
[Cao, L. H.; Cai, H. B.] Inst Appl Phys & Computat Math, Beijing 100088, Peoples R China.
[Sentoku, Y.] Univ Nevada, NTF MS372, Dept Phys, Reno, NV 89506 USA.
[Pukhov, A.] Univ Dusseldorf, Inst Theoret Phys 1, D-40225 Dusseldorf, Germany.
[Kumar, R.] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India.
[Snavely, R.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Freeman, R.] Ohio State Univ, Coll Math & Phys Sci, Columbus, OH 43210 USA.
[Yu, Min] Zhejiang Univ, Inst Fus Theory & Simulat, Hangzhou 310027, Peoples R China.
[Zheng, J.] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China.
RP Lei, AL (reprint author), Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China.
RI Sentoku, Yasuhiko/P-5419-2014; Nagai, Keiji/E-5155-2014; Norimatsu,
Takayoshi/I-5710-2015; pukhov, alexander/C-8082-2016; Mima,
Kunioki/H-9014-2016; Kodama, Ryosuke/G-2627-2016
NR 33
TC 16
Z9 16
U1 0
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056307
DI 10.1063/1.3101912
PG 6
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600120
ER
PT J
AU Li, CK
Seguin, FH
Frenje, JA
Manuel, M
Casey, D
Sinenian, N
Petrasso, RD
Amendt, PA
Landen, OL
Rygg, JR
Town, RPJ
Betti, R
Delettrez, J
Knauer, JP
Marshall, F
Meyerhofer, DD
Sangster, TC
Shvarts, D
Smalyuk, VA
Soures, JM
Back, CA
Kilkenny, JD
Nikroo, A
AF Li, C. K.
Seguin, F. H.
Frenje, J. A.
Manuel, M.
Casey, D.
Sinenian, N.
Petrasso, R. D.
Amendt, P. A.
Landen, O. L.
Rygg, J. R.
Town, R. P. J.
Betti, R.
Delettrez, J.
Knauer, J. P.
Marshall, F.
Meyerhofer, D. D.
Sangster, T. C.
Shvarts, D.
Smalyuk, V. A.
Soures, J. M.
Back, C. A.
Kilkenny, J. D.
Nikroo, A.
TI Proton radiography of dynamic electric and magnetic fields in
laser-produced high-energy-density plasmas
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE corona; explosions; plasma inertial confinement; plasma production by
laser
ID CONFINEMENT-FUSION PLASMAS; RECONNECTION; IMPLOSIONS; COMPRESSION;
IRRADIATION; PERFORMANCE; INSTABILITY; UNIFORMITY; TRANSPORT; TARGETS
AB Time-gated, monoenergetic-proton radiography provides unique measurements of the electric (E) and magnetic (B) fields produced in laser-foil interactions and during the implosion of inertial-confinement-fusion capsules. These experiments resulted in the first observations of several new and important features: (1) observations of the generation, decay dynamics, and instabilities of megagauss B fields in laser-driven planar plastic foils, (2) the observation of radial E fields inside an imploding capsule, which are initially directed inward, reverse direction during deceleration, and are likely related to the evolution of the electron pressure gradient, and (3) the observation of many radial filaments with complex electromagnetic field striations in the expanding coronal plasmas surrounding the capsule. The physics behind and implications of such observed fields are discussed.
C1 [Li, C. K.; Seguin, F. H.; Frenje, J. A.; Manuel, M.; Casey, D.; Sinenian, N.; Petrasso, R. D.] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA.
[Amendt, P. A.; Landen, O. L.; Rygg, J. R.; Town, R. P. J.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Betti, R.; Delettrez, J.; Knauer, J. P.; Marshall, F.; Meyerhofer, D. D.; Sangster, T. C.; Shvarts, D.; Smalyuk, V. A.; Soures, J. M.] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA.
[Betti, R.; Meyerhofer, D. D.] Univ Rochester, Dept Mech Engn Phys & Astron, Rochester, NY 14623 USA.
[Shvarts, D.] Negev & Ben Gurion Univ Negev, NRCN, IL-84015 Beer Sheva, Israel.
[Back, C. A.; Kilkenny, J. D.; Nikroo, A.] Gen Atom Co, San Diego, CA 92186 USA.
RP Li, CK (reprint author), MIT, Plasma Sci & Fus Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
EM li@psfc.mit.edu
RI Manuel, Mario/L-3213-2015
OI Manuel, Mario/0000-0002-5834-1161
NR 41
TC 18
Z9 21
U1 1
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056304
DI 10.1063/1.3096781
PG 6
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600117
ER
PT J
AU Liu, YQ
Chapman, IT
Chu, MS
Reimerdes, H
Villone, F
Albanese, R
Ambrosino, G
Garofalo, AM
Gimblett, CG
Hastie, RJ
Hender, TC
Jackson, GL
La Haye, RJ
Okabayashi, M
Pironti, A
Portone, A
Rubinacci, G
Strait, EJ
AF Liu, Yueqiang
Chapman, I. T.
Chu, M. S.
Reimerdes, H.
Villone, F.
Albanese, R.
Ambrosino, G.
Garofalo, A. M.
Gimblett, C. G.
Hastie, R. J.
Hender, T. C.
Jackson, G. L.
La Haye, R. J.
Okabayashi, M.
Pironti, A.
Portone, A.
Rubinacci, G.
Strait, E. J.
TI Progress in physics and control of the resistive wall mode in advanced
tokamaks
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
ID ROTATIONAL STABILIZATION; STABILITY; PLASMAS; SHEAR; FEEDBACK; KINK;
ITER
AB Self-consistent computations are carried out to study the stability of the resistive wall mode (RWM) in DIII-D [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] plasmas with slow plasma rotation, using the hybrid kinetic-magnetohydrodynamic code MARS-K [Y. Q. Liu et al., Phys. Plasmas 15, 112503 (2008)]. Based on kinetic resonances between the mode and the thermal particle toroidal precession drifts, the self-consistent modeling predicts less stabilization of the mode compared to perturbative approaches, and with the DIII-D experiments. A simple analytic model is proposed to explain the MARS-K results, which also gives a qualitative interpretation of the recent experimental results observed in JT-60U [S. Takeji et al., Nucl. Fusion 42, 5 (2002)]. Our present analysis does not include the kinetic contribution from hot ions, which may give additional damping on the mode. The effect of particle collision is not included either. Using the CARMA code [R. Albanese et al., IEEE Trans. Magn. 44, 1654 (2008)], a stability and control analysis is performed for the RWM in ITER [R. Aymar et al., Plasma Phys. Controlled Fusion 44, 519 (2002)] steady state advanced plasmas, taking into account the influence of three-dimensional conducting structures. [DOI: 10.1063/1.3123388]
C1 [Liu, Yueqiang; Chapman, I. T.; Gimblett, C. G.; Hastie, R. J.; Hender, T. C.] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England.
[Chu, M. S.; Garofalo, A. M.; Jackson, G. L.; La Haye, R. J.; Strait, E. J.] Gen Atom Co, San Diego, CA 92186 USA.
[Reimerdes, H.] Columbia Univ, New York, NY 10027 USA.
[Villone, F.; Ambrosino, G.; Pironti, A.] Univ Cassino, DAEIMI, ENEA CREATE, I-03043 Cassino, FR, Italy.
[Albanese, R.; Rubinacci, G.] Univ Naples Federico 2, ENEA CREATE, I-80125 Naples, Italy.
[Okabayashi, M.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Portone, A.] Fus Energy, Barcelona 08019, Spain.
RP Liu, YQ (reprint author), UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England.
EM yueqiang.liu@ukaea.org.uk
RI Albanese, Raffaele/B-5394-2016;
OI Albanese, Raffaele/0000-0003-4586-8068; Ambrosino,
Giuseppe/0000-0002-2549-2772
NR 39
TC 38
Z9 40
U1 1
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056113
DI 10.1063/1.3123388
PG 12
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600106
ER
PT J
AU Maqueda, RJ
Maingi, R
AF Maqueda, R. J.
Maingi, R.
CA NSTX team,
TI Primary edge localized mode filament structure in the National Spherical
Torus Experiment
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE filamentation instability; plasma diagnostics; plasma
magnetohydrodynamics; plasma toroidal confinement; plasma turbulence
ID SCRAPE-OFF LAYER; ASDEX UPGRADE; ELMS; MAST; NSTX; TRANSPORT;
TURBULENCE; STABILITY; PEDESTAL; JET
AB Edge localized modes (ELMs) are routinely seen in the National Spherical Torus Experiment (NSTX) [M. Ono, Nucl. Fusion 40, 557 (2000)]. These unstable modes give rise to plasma filaments that burst radially outward during the nonlinear phase of the instability, moving across flux surfaces into the scrape-off layer. Fast-frame visible imaging is used in NSTX to study the evolution and characteristics of the post-ELM filaments. These edge filaments, which are well aligned with the local magnetic field, are seen to evolve from a perturbation of the edge that within 40-50 mu s develops into the relatively high density/temperature primary filaments. The distribution of primary filaments in toroidal angle is seen to agree with a random model with moderate average toroidal mode numbers. At the same time, gas puff imaging shows that the perturbation of the edge leading to the burst of the ELM into the scrape-off layer is characterized by a broadband increase in fluctuations at much smaller poloidal wavelengths (lambda(pol)similar to 2-12 cm). These two measurements suggest that early development of turbulence may play a role in the development of primary ELM filamentation.
C1 [Maqueda, R. J.] Nova Photon Inc, Princeton, NJ 08540 USA.
[Maingi, R.] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA.
RP Maqueda, RJ (reprint author), Nova Photon Inc, Princeton, NJ 08540 USA.
NR 29
TC 24
Z9 24
U1 1
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056117
DI 10.1063/1.3085798
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600110
ER
PT J
AU McDevitt, CJ
Diamond, PH
Gurcan, OD
Hahm, TS
AF McDevitt, C. J.
Diamond, P. H.
Guercan, Oe. D.
Hahm, T. S.
TI A novel mechanism for exciting intrinsic toroidal rotation
SO PHYSICS OF PLASMAS
LA English
DT Article
DE convection; phase space methods; plasma flow; plasma toroidal
confinement; plasma turbulence
ID DRIFT-WAVE TURBULENCE; GYROKINETIC EQUATIONS; TRANSPORT BARRIERS;
MOMENTUM; TOKAMAKS; PLASMAS; FLOWS; VELOCITY; FIELD; MODE
AB Beginning from a phase space conserving gyrokinetic formulation, a systematic derivation of parallel momentum conservation uncovers two physically distinct mechanisms by which microturbulence may drive intrinsic rotation. The first mechanism, which emanates from ExB convection of parallel momentum, has already been analyzed [O. D. Gurcan , Phys. Plasmas 14, 042306 (2007); R. R. Dominguez and G. M. Staebler, Phys. Fluids B 5, 3876 (1993)] and was shown to follow from radial electric field shear induced symmetry breaking of the spectrally averaged parallel wave number. Thus, this mechanism is most likely active in regions with steep pressure gradients or strong poloidal flow shear. The second mechanism uncovered, which appears in the gyrokinetic formulation through the parallel nonlinearity, emerges due to charge separation induced by the polarization drift. This novel means of driving intrinsic rotation, while nominally higher order in an expansion of the mode frequency divided by the ion cyclotron frequency, does not depend on radial electric field shear. Thus, while the magnitude of the former mechanism is strongly reduced in regions of weak radial electric field shear, this mechanism remains unabated and is thus likely relevant in complementary regimes.
C1 [McDevitt, C. J.; Diamond, P. H.] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
[Hahm, T. S.] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Guercan, Oe. D.] CEA Cadarache, F-13108 St Paul Les Durance, France.
[McDevitt, C. J.; Diamond, P. H.] Univ Calif San Diego, Ctr Astrophys & Space Sci, La Jolla, CA 92093 USA.
RP McDevitt, CJ (reprint author), Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
EM cmcdevitt@ucsd.edu
RI Gurcan, Ozgur/A-1362-2013;
OI Gurcan, Ozgur/0000-0002-2278-1544; McDevitt,
Christopher/0000-0002-3674-2909
NR 47
TC 32
Z9 32
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 052302
DI 10.1063/1.3122048
PG 12
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600018
ER
PT J
AU Park, JK
Boozer, AH
Menard, JE
Garofalo, AM
Schaffer, MJ
Hawryluk, RJ
Kaye, SM
Gerhardt, SP
Sabbagh, SA
AF Park, Jong-kyu
Boozer, Allen H.
Menard, Jonathan E.
Garofalo, Andrea M.
Schaffer, Michael J.
Hawryluk, Richard J.
Kaye, Stanley M.
Gerhardt, Stefan P.
Sabbagh, Steve A.
CA NSTX Team
TI Importance of plasma response to nonaxisymmetric perturbations in
tokamaks
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
ID RESONANT MAGNETIC PERTURBATIONS; TOROIDAL-MOMENTUM DISSIPATION;
BANANA-DRIFT TRANSPORT; DIII-D; DIFFUSION; GEOMETRY; SYSTEMS; PHYSICS;
FIELDS; MODES
AB Tokamaks are sensitive to deviations from axisymmetry as small as delta B/B(0) similar to 10(-4). These nonaxisymmetric perturbations greatly modify plasma confinement and performance by either destroying magnetic surfaces with subsequent locking or deforming magnetic surfaces with associated nonambipolar transport. The Ideal Perturbed Equilibrium Code (IPEC) calculates ideal perturbed equilibria and provides important basis for understanding the sensitivity of tokamak plasmas to perturbations. IPEC calculations indicate that the ideal plasma response, or equivalently the effect by ideally perturbed plasma currents, is essential to explain locking experiments on National Spherical Torus eXperiment (NSTX) and DIII-D. The ideal plasma response is also important for neoclassical toroidal viscosity (NTV) in nonambipolar transport. The consistency between NTV theory and magnetic braking experiments on NSTX and DIII-D can be improved when the variation in the field strength in IPEC is coupled with generalized NTV theory. These plasma response effects will be compared with the previous vacuum superpositions to illustrate the importance. However, plasma response based on ideal perturbed equilibria is still not sufficiently accurate to predict the details of NTV transport and can be inconsistent when currents associated with a toroidal torque become comparable to ideal perturbed currents. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3122862]
C1 [Park, Jong-kyu; Menard, Jonathan E.; Hawryluk, Richard J.; Kaye, Stanley M.; Gerhardt, Stefan P.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Boozer, Allen H.; Sabbagh, Steve A.] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA.
[Garofalo, Andrea M.; Schaffer, Michael J.] Gen Atom Co, San Diego, CA 92186 USA.
RP Park, JK (reprint author), Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RI Sabbagh, Steven/C-7142-2011;
OI Menard, Jonathan/0000-0003-1292-3286
NR 49
TC 48
Z9 48
U1 2
U2 12
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056115
DI 10.1063/1.3122862
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600108
ER
PT J
AU Podesta, M
Heidbrink, WW
Liu, D
Ruskov, E
Bell, RE
Darrow, DS
Fredrickson, ED
Gorelenkov, NN
Kramer, GJ
LeBlanc, BP
Medley, SS
Roquemore, AL
Crocker, NA
Kubota, S
Yuh, H
AF Podesta, M.
Heidbrink, W. W.
Liu, D.
Ruskov, E.
Bell, R. E.
Darrow, D. S.
Fredrickson, E. D.
Gorelenkov, N. N.
Kramer, G. J.
LeBlanc, B. P.
Medley, S. S.
Roquemore, A. L.
Crocker, N. A.
Kubota, S.
Yuh, H.
TI Experimental studies on fast-ion transport by Alfven wave avalanches on
the National Spherical Torus Experiment
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE plasma Alfven waves; plasma magnetohydrodynamic waves; plasma toroidal
confinement; plasma transport processes
ID TOROIDAL PLASMAS; PHYSICS; NSTX; PREDICTIONS; INSTABILITY; SIMULATION;
EIGENMODES; SYSTEMS
AB Fast-ion transport induced by Alfven eigenmodes (AEs) is studied in beam-heated plasmas on the National Spherical Torus Experiment [Ono , Nucl. Fusion 40, 557 (2000)] through space, time, and energy resolved measurements of the fast-ion population. Fast-ion losses associated with multiple toroidicity-induced AEs (TAEs), which interact nonlinearly and terminate in avalanches, are characterized. A depletion of the energy range >20 keV, leading to sudden drops of up to 40% in the neutron rate over 1 ms, is observed over a broad spatial range. It is shown that avalanches lead to a relaxation of the fast-ion profile, which in turn reduces the drive for the instabilities. The measured radial eigenmode structure and frequency of TAEs are compared with the predictions from a linear magnetohydrodynamics stability code. The partial disagreement suggests that nonlinearities may compromise a direct comparison between experiment and linear theory.
C1 [Podesta, M.; Heidbrink, W. W.; Liu, D.; Ruskov, E.] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
[Bell, R. E.; Darrow, D. S.; Fredrickson, E. D.; Gorelenkov, N. N.; Kramer, G. J.; LeBlanc, B. P.; Medley, S. S.; Roquemore, A. L.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Crocker, N. A.; Kubota, S.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
[Yuh, H.] Nova Photon, Princeton, NJ 08543 USA.
RP Podesta, M (reprint author), Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
EM mpodesta@pppl.gov
RI Liu, Deyong/Q-2797-2015
OI Liu, Deyong/0000-0001-9174-7078
NR 34
TC 37
Z9 37
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056104
DI 10.1063/1.3080724
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600097
ER
PT J
AU Qin, H
Davidson, RC
AF Qin, Hong
Davidson, Ronald C.
TI A physical parametrization of coupled transverse dynamics based on
generalized Courant-Snyder theory and its applications
SO PHYSICS OF PLASMAS
LA English
DT Article
DE particle accelerators; particle beam dynamics; transfer function
matrices
ID HARMONIC-OSCILLATOR; INVARIANT
AB A physical parametrization of coupled transverse dynamics is developed by generalizing the Courant-Snyder (CS) theory for one degree of freedom to the case of coupled transverse dynamics with two degrees of freedom. The four basic components of the original CS theory, i.e., the envelope equation, phase advance, transfer matrix, and CS invariant, all have their counterparts with remarkably similar expressions in the generalized theory. Applications of the new theory are given. It is discovered that the stability of coupled dynamics is completely determined by the generalized phase advance.
C1 [Qin, Hong; Davidson, Ronald C.] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Qin, H (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
NR 19
TC 13
Z9 13
U1 0
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 050705
DI 10.1063/1.3142472
PG 4
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600005
ER
PT J
AU Raitses, Y
Smirnov, A
Fisch, NJ
AF Raitses, Y.
Smirnov, A.
Fisch, N. J.
TI Effects of enhanced cathode electron emission on Hall thruster operation
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE aerospace propulsion; plasma accelerators
ID STATIONARY PLASMA THRUSTER; CROSS-FIELD TRANSPORT; MODEL; FLOW; WALL;
ION
AB Interesting discharge phenomena are observed that have to do with the interaction between the magnetized Hall thruster plasma and the neutralizing cathode. The steady-state parameters of a highly ionized thruster discharge are strongly influenced by the electron supply from the cathode. The enhancement of the cathode electron emission above its self-sustained level affects the discharge current and leads to a dramatic reduction in the plasma divergence and a suppression of large amplitude, low frequency discharge current oscillations usually related to an ionization instability. These effects correlate strongly with the reduction in the voltage drop in the region with the fringing magnetic field between the thruster channel and the cathode. The measured changes in the plasma properties suggest that the electron emission affects the electron cross-field transport in the thruster discharge. These trends are generalized for Hall thrusters of various configurations.
C1 [Raitses, Y.; Smirnov, A.; Fisch, N. J.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Raitses, Y (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM yraitses@pppl.gov
NR 41
TC 21
Z9 21
U1 0
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 057106
DI 10.1063/1.3131282
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600139
ER
PT J
AU Sanchez, R
Newman, DE
Leboeuf, JN
Carreras, BA
Decyk, VK
AF Sanchez, R.
Newman, D. E.
Leboeuf, J. -N.
Carreras, B. A.
Decyk, V. K.
TI On the nature of radial transport across sheared zonal flows in
electrostatic ion-temperature-gradient gyrokinetic tokamak plasma
turbulence
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY NOV 17-21, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE flow simulation; plasma flow; plasma simulation; plasma turbulence;
shear turbulence; Tokamak devices
ID SELF-ORGANIZED CRITICALITY; PARTICLE SIMULATION-MODEL; DRIVEN
TURBULENCE; ANOMALOUS DIFFUSION; RANDOM-WALKS; CONFINEMENT; DYNAMICS;
PARADIGM; DEVICES; FUSION
AB It is argued that the usual understanding of the suppression of radial turbulent transport across a sheared zonal flow based on a reduction in effective transport coefficients is, by itself, incomplete. By means of toroidal gyrokinetic simulations of electrostatic, ion-temperature-gradient turbulence, it is found instead that the character of the radial transport is altered fundamentally by the presence of a sheared zonal flow, changing from diffusive to anticorrelated and subdiffusive. Furthermore, if the flows are self-consistently driven by the turbulence via the Reynolds stresses (in contrast to being induced externally), radial transport becomes non-Gaussian as well. These results warrant a reevaluation of the traditional description of radial transport across sheared flows in tokamaks via effective transport coefficients, suggesting that such description is oversimplified and poorly captures the underlying dynamics, which may in turn compromise its predictive capabilities.
C1 [Sanchez, R.] Oak Ridge Natl Lab, Div Fus Energy, Oak Ridge, TN 37831 USA.
[Newman, D. E.] Univ Alaska, Dept Phys, Fairbanks, AK 99775 USA.
[Leboeuf, J. -N.] JNL Sci Inc, Casa Grande, AZ 85294 USA.
[Carreras, B. A.] BACV Solut Inc, Oak Ridge, TN 37830 USA.
[Decyk, V. K.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
RP Sanchez, R (reprint author), Oak Ridge Natl Lab, Div Fus Energy, Oak Ridge, TN 37831 USA.
EM sanchezferlr@ornl.gov
NR 46
TC 15
Z9 15
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 055905
DI 10.1063/1.3129727
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600092
ER
PT J
AU Sefkow, AB
Davidson, RC
Gilson, EP
Kaganovich, ID
Anders, A
Coleman, JE
Leitner, M
Lidia, SM
Roy, PK
Seidl, PA
Waldron, WL
Yu, SS
Welch, DR
AF Sefkow, A. B.
Davidson, R. C.
Gilson, E. P.
Kaganovich, I. D.
Anders, A.
Coleman, J. E.
Leitner, M.
Lidia, S. M.
Roy, P. K.
Seidl, P. A.
Waldron, W. L.
Yu, S. S.
Welch, D. R.
TI Simulations and experiments of intense ion beam current density
compression in space and time
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY NOV 17-21, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE ion density; plasma density; plasma simulation; space charge
ID INERTIAL-CONFINEMENT-FUSION; TRANSPORT; NEUTRALIZATION; PROPAGATION;
DESIGN; MATTER
AB The Heavy Ion Fusion Science Virtual National Laboratory has achieved 60-fold longitudinal pulse compression of ion beams on the Neutralized Drift Compression Experiment (NDCX) [P. K. Roy , Phys. Rev. Lett. 95, 234801 (2005)]. To focus a space-charge-dominated charge bunch to sufficiently high intensities for ion-beam-heated warm dense matter and inertial fusion energy studies, simultaneous transverse and longitudinal compression to a coincident focal plane is required. Optimizing the compression under the appropriate constraints can deliver higher intensity per unit length of accelerator to the target, thereby facilitating the creation of more compact and cost-effective ion beam drivers. The experiments utilized a drift region filled with high-density plasma in order to neutralize the space charge and current of an similar to 300 keV K+ beam and have separately achieved transverse and longitudinal focusing to a radius < 2 mm and pulse duration < 5 ns, respectively. Simulation predictions and recent experiments demonstrate that a strong solenoid (B-z < 100 kG) placed near the end of the drift region can transversely focus the beam to the longitudinal focal plane. This paper reports on simulation predictions and experimental progress toward realizing simultaneous transverse and longitudinal charge bunch focusing. The proposed NDCX-II facility would capitalize on the insights gained from NDCX simulations and measurements in order to provide a higher-energy (>2 MeV) ion beam user-facility for warm dense matter and inertial fusion energy-relevant target physics experiments.
C1 [Sefkow, A. B.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Davidson, R. C.; Kaganovich, I. D.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Gilson, E. P.; Anders, A.; Coleman, J. E.; Leitner, M.; Lidia, S. M.; Roy, P. K.; Seidl, P. A.; Waldron, W. L.; Yu, S. S.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Welch, D. R.] Voss Sci, Albuquerque, NM 87108 USA.
RP Sefkow, AB (reprint author), Sandia Natl Labs, Albuquerque, NM 87185 USA.
RI Anders, Andre/B-8580-2009
OI Anders, Andre/0000-0002-5313-6505
NR 36
TC 8
Z9 8
U1 0
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056701
DI 10.1063/1.3078424
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600127
ER
PT J
AU Sefkow, AB
Cohen, SA
AF Sefkow, Adam B.
Cohen, Samuel A.
TI Particle-in-cell modeling of magnetized argon plasma flow through small
mechanical apertures
SO PHYSICS OF PLASMAS
LA English
DT Article
DE argon; plasma devices; plasma flow; plasma heating; plasma simulation
ID ACOUSTIC DOUBLE-LAYERS; ION; PARALLEL; VELOCITY
AB Motivated by observations of supersonic argon-ion flow generated by linear helicon-heated plasma devices, a three-dimensional particle-in-cell (PIC) code is used to study whether stationary electrostatic layers form near mechanical apertures intersecting the flow of magnetized plasma. By self-consistently evaluating the temporal evolution of the plasma in the vicinity of the aperture, the PIC simulations characterize the roles of the imposed aperture and applied magnetic field on ion acceleration. The PIC model includes ionization of a background neutral-argon population by thermal and superthermal electrons, the latter found upstream of the aperture. Near the aperture, a transition from a collisional to a collisionless regime occurs. Perturbations of density and potential, with millimeter wavelengths and consistent with ion acoustic waves, propagate axially. An ion acceleration region of length similar to 200 lambda(D,e)-300 lambda(D,e) forms at the location of the aperture and is found to be an electrostatic double layer, with axially separated regions of net positive and negative charge. Reducing the aperture diameter or increasing its length increases the double layer strength.
C1 [Sefkow, Adam B.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Cohen, Samuel A.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Sefkow, AB (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
FU United States Department of Energy [DE-AC02-76-CHO-3073]
FX Sandia is a multiprogram laboratory operated by Sandia Corporation, a
Lockheed Martin Company, for the United States Department of Energy's
National Nuclear Security Administration under Contract No.
DE-AC04-94AL85000. This work was supported in part through the Princeton
Plasma Physics Laboratory by the United States Department of Energy
Contract No. DE-AC02-76-CHO-3073. The authors would like to acknowledge
R. C. Davidson, M. C. Herrmann, and E. Scime for support, X. Sun and A.
Keesee for experimental work, I. D. Kaganovich for helpful feedback and
suggestions, and D. R. Welch for LSP code information.
NR 28
TC 5
Z9 5
U1 1
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 053501
DI 10.1063/1.3119902
PG 13
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600055
ER
PT J
AU Shadwick, BA
Schroeder, CB
Esarey, E
AF Shadwick, B. A.
Schroeder, C. B.
Esarey, E.
TI Nonlinear laser energy depletion in laser-plasma accelerators
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE plasma accelerators; plasma light propagation; plasma waves; red shift
ID WAKE-FIELD GENERATION; ELECTRON-BEAMS; PUMP DEPLETION; PULSES; WAVE
AB Energy depletion of intense, short-pulse lasers via excitation of plasma waves is investigated numerically and analytically. The evolution of a resonant laser pulse proceeds in two phases. In the first phase, the pulse steepens, compresses, and frequency redshifts as energy is deposited in the plasma. The second phase of evolution occurs after the pulse reaches a minimum length at which point the pulse rapidly lengthens, losing resonance with the plasma. Expressions for the rate of laser energy loss and rate of laser redshifting are derived and are found to be in excellent agreement with the direct numerical solution of the laser field evolution coupled to the plasma response. Both processes are shown to have the same characteristic length scale. In the high intensity limit, for nearly resonant Gaussian laser pulses, this scale length is shown to be independent of laser intensity.
C1 [Shadwick, B. A.] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA.
[Schroeder, C. B.; Esarey, E.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Shadwick, BA (reprint author), Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA.
EM shadwick@mailaps.org
OI Schroeder, Carl/0000-0002-9610-0166
NR 19
TC 45
Z9 45
U1 2
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056704
DI 10.1063/1.3124185
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600130
ER
PT J
AU Shelkovenko, TA
Pikuz, SA
McBride, RD
Knapp, PF
Wilhelm, H
Hammer, DA
Sinars, DB
AF Shelkovenko, T. A.
Pikuz, S. A.
McBride, R. D.
Knapp, P. F.
Wilhelm, H.
Hammer, D. A.
Sinars, D. B.
TI Nested multilayered X pinches for generators with mega-ampere current
level
SO PHYSICS OF PLASMAS
LA English
DT Article
DE pinch effect; plasma X-ray sources
ID RAY SOURCE; DYNAMICS; ARRAY; WIRES
AB A symmetric X pinch configuration that is conducive to using large numbers of wires on >= 1 MA pulsed power generators has been tested at 1 MA. Using an initial configuration of wires before their twisting, similar to nested cylindrical wire arrays, enables a geometrically simple, compact, multilayer wire configuration at the X pinch crossing region. Multilayer X pinches with the same or different materials in the inner and outer wire layers were tested. Optimization resulted in X pinch radiation sources with peak power comparable to the most successful single layer X pinch, but with a compact, single bright X radiation source more reliably obtained using the nested configuration.
C1 [Shelkovenko, T. A.; Pikuz, S. A.; McBride, R. D.; Knapp, P. F.; Wilhelm, H.; Hammer, D. A.] Cornell Univ, Plasma Studies Lab, Ithaca, NY 14853 USA.
[Sinars, D. B.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Shelkovenko, TA (reprint author), Cornell Univ, Plasma Studies Lab, Ithaca, NY 14853 USA.
RI Pikuz, Sergey/M-8231-2015; Shelkovenko, Tatiana/M-8254-2015
FU National Nuclear Security Administration under DOE [DE-FC03-02NA00057];
Sandia National Laboratories
FX This work was partially supported by the Stewardship Sciences Academic
Alliances program of the National Nuclear Security Administration under
DOE Cooperative Agreement No. DE-FC03-02NA00057 and by Laboratory
Directed Research and Development funds at Sandia National Laboratories.
NR 27
TC 12
Z9 12
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 050702
DI 10.1063/1.3132611
PG 4
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600002
ER
PT J
AU Shivamoggi, BK
AF Shivamoggi, Bhimsen K.
TI Parker problem in Hall magnetohydrodynamics
SO PHYSICS OF PLASMAS
LA English
DT Article
DE plasma magnetohydrodynamics; plasma toroidal confinement
ID MAGNETIC RECONNECTION; CURRENT SHEETS; TEARING MODE; FIELDS
AB The Parker problem in Hall magnetohydrodynamics (MHD) is considered. Poloidal shear superposed on the toroidal ion flow associated with the Hall effect is incorporated. This is found to lead to a triple deck structure for the Parker problem in Hall MHD, with the magnetic field falling off in the intermediate Hall-resistive region more steeply (like 1/x(3)) than that (like 1/x) in the outer ideal MHD region.
C1 [Shivamoggi, Bhimsen K.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Shivamoggi, Bhimsen K.] Univ Cent Florida, Orlando, FL 32816 USA.
RP Shivamoggi, BK (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
NR 18
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 052111
DI 10.1063/1.3140055
PG 4
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600016
ER
PT J
AU Shvets, G
Polomarov, O
Khudik, V
Siemon, C
Kaganovich, I
AF Shvets, Gennady
Polomarov, Oleg
Khudik, Vladimir
Siemon, Carl
Kaganovich, Igor
TI Nonlinear evolution of the Weibel instability of relativistic electron
beams
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE plasma instability; plasma nonlinear processes; plasma simulation;
plasma-beam interactions; relativistic electron beams
ID COLLISIONLESS SHOCKS; MAGNETIC-FIELDS; ELECTROMAGNETIC INSTABILITIES;
2-STREAM INSTABILITY; ION-BEAM; PLASMA; IGNITION; FILAMENTATION;
GENERATION; SIMULATION
AB Physics of the long-term evolution of the Weibel instability (WI) of an electron beam propagating through the plasma is described. Several phenomena occurring during the WI are identified: (i) the exponential growth stage resulting in beam breakup into small current filaments; (ii) merger of the small filaments and beam particles' trapping inside them; (iii) filaments' compression and expulsion of the ambient plasma from the filaments; (iv) formation of high-current filaments and their merger. It is shown that during the final stage these beam filaments can carry super-Alfvenic currents and form hollow current density profiles similar to the Hammer-Rostoker equilibrium. This explains why the initially increasing magnetic field energy eventually decreases during the late stage of the instability. Different computational approaches to modeling both collisionless and collisional WI are also described.
C1 [Shvets, Gennady; Khudik, Vladimir; Siemon, Carl] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA.
[Shvets, Gennady; Khudik, Vladimir; Siemon, Carl] Univ Texas Austin, Inst Fus Studies, Austin, TX 78712 USA.
[Polomarov, Oleg] Univ Rochester, Laser Energet Lab, Fus Sci Ctr, Rochester, NY 14623 USA.
[Kaganovich, Igor] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Shvets, G (reprint author), Univ Texas Austin, Dept Phys, Austin, TX 78712 USA.
NR 34
TC 12
Z9 12
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056303
DI 10.1063/1.3093477
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600116
ER
PT J
AU Simakov, AN
Chacon, L
AF Simakov, Andrei N.
Chacon, L.
TI Quantitative analytical model for magnetic reconnection in Hall
magnetohydrodynamics
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE diffusion; magnetic reconnection; plasma magnetohydrodynamics; plasma
transport processes
ID COALESCENCE INSTABILITY; LARGE SYSTEMS; COLLISIONLESS; ISLANDS; PLASMAS;
DIFFUSION; DRIVEN
AB Magnetic reconnection is of fundamental importance for laboratory and naturally occurring plasmas. Reconnection usually develops on time scales which are much shorter than those associated with classical collisional dissipation processes, and which are not fully understood. While such dissipation-independent (or "fast") reconnection rates have been observed in particle and Hall magnetohydrodynamics (MHD) simulations and predicted analytically in electron MHD, a quantitative analytical theory of fast reconnection valid for arbitrary ion inertial lengths d(i) has been lacking. Here we propose such a theory without a guide field. The theory describes two-dimensional magnetic field diffusion regions, provides expressions for the reconnection rates, and derives a formal criterion for fast reconnection in terms of dissipation parameters and d(i). It also demonstrates that both open X-point and elongated diffusion regions allow dissipation-independent reconnection and reveals a possibility of strong dependence of the reconnection rates on d(i).
C1 [Simakov, Andrei N.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Chacon, L.] Oak Ridge Natl Lab, Div Fus Energy, Oak Ridge, TN 37831 USA.
RP Simakov, AN (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
OI Simakov, Andrei/0000-0001-7064-9153
NR 49
TC 10
Z9 10
U1 1
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 055701
DI 10.1063/1.3077269
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600080
ER
PT J
AU Valanju, PM
Kotschenreuther, M
Mahajan, SM
Canik, J
AF Valanju, P. M.
Kotschenreuther, M.
Mahajan, S. M.
Canik, J.
TI Super-X divertors and high power density fusion devices
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY NOV 17-21, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE fusion reactor divertors; plasma temperature; plasma toroidal
confinement
ID PHYSICS; TOKAMAK; PLASMA
AB The Super-X Divertor (SXD), a robust axisymmetric redesign of the divertor magnetic geometry that can allow a fivefold increase in the core power density of toroidal fusion devices, is presented. With small changes in poloidal coils and currents for standard divertors, the SXD allows the largest divertor plate radius inside toroidal field coils. This increases the plasma-wetted area by 2-3 times over all flux-expansion-only methods (e.g., plate near main X point, plate tilting, X divertor, and snowflake), decreases parallel heat flux and hence plasma temperature at plate, and increases connection length by 2-5 times. Examples of high-power-density fusion devices enabled by SXD are discussed; the most promising near-term device is a 100 MW modular compact fusion neutron source "battery" small enough to fit inside a conventional fission blanket.
C1 [Valanju, P. M.; Kotschenreuther, M.; Mahajan, S. M.] Univ Texas Austin, Inst Fus Studies, Austin, TX 78712 USA.
[Canik, J.] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA.
RP Valanju, PM (reprint author), Univ Texas Austin, Inst Fus Studies, Austin, TX 78712 USA.
EM pvalanju@mail.utexas.edu
OI Canik, John/0000-0001-6934-6681
NR 25
TC 81
Z9 82
U1 5
U2 24
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056110
DI 10.1063/1.3110984
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600103
ER
PT J
AU Yuh, HY
Levinton, FM
Bell, RE
Hosea, JC
Kaye, SM
LeBlanc, BP
Mazzucato, E
Peterson, JL
Smith, DR
Candy, J
Waltz, RE
Domier, CW
Luhmann, NC
Lee, W
Park, HK
AF Yuh, H. Y.
Levinton, F. M.
Bell, R. E.
Hosea, J. C.
Kaye, S. M.
LeBlanc, B. P.
Mazzucato, E.
Peterson, J. L.
Smith, D. R.
Candy, J.
Waltz, R. E.
Domier, C. W.
Luhmann, N. C., Jr.
Lee, W.
Park, H. K.
TI Internal transport barriers in the National Spherical Torus Experiment
SO PHYSICS OF PLASMAS
LA English
DT Article; Proceedings Paper
CT 50th Annual Meeting of the Division of Plasma Physics of the
American-Physical-Society
CY FEB 01, 2008
CL Dallas, TX
SP Amer Phys Soc, Div Plasma Phys
DE diffusion; discharges (electric); plasma diagnostics; plasma heating;
plasma instability; plasma production; plasma temperature; plasma
toroidal confinement; plasma transport processes; plasma turbulence
ID SCATTERING SYSTEM; ASPECT RATIO; SHEAR; TURBULENCE; TOKAMAKS; NSTX;
OPERATION; PLASMA
AB In the National Spherical Torus Experiment [M. Ono , Nucl. Fusion 41, 1435 (2001)], internal transport barriers (ITBs) are observed in reversed (negative) shear discharges where diffusivities for electron and ion thermal channels and momentum are reduced. While neutral beam heating can produce ITBs in both electron and ion channels, high harmonic fast wave heating can also produce electron ITBs (e-ITBs) under reversed magnetic shear conditions without momentum input. Interestingly, the location of the e-ITB does not necessarily match that of the ion ITB (i-ITB). The e-ITB location correlates best with the magnetic shear minima location determined by motional Stark effect constrained equilibria, whereas the i-ITB location better correlates with the location of maximum ExB shearing rate. Measured electron temperature gradients in the e-ITB can exceed critical gradients for the onset of electron thermal gradient microinstabilities calculated by linear gyrokinetic codes. A high-k microwave scattering diagnostic shows locally reduced density fluctuations at wave numbers characteristic of electron turbulence for discharges with strongly negative magnetic shear versus weakly negative or positive magnetic shear. Reductions in fluctuation amplitude are found to be correlated with the local value of magnetic shear. These results are consistent with nonlinear gyrokinetic simulations predicting a reduction in electron turbulence under negative magnetic shear conditions despite exceeding critical gradients.
C1 [Yuh, H. Y.; Levinton, F. M.] Nova Photon Inc, Princeton, NJ 08540 USA.
[Bell, R. E.; Hosea, J. C.; Kaye, S. M.; LeBlanc, B. P.; Mazzucato, E.; Peterson, J. L.; Smith, D. R.] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Candy, J.] Gen Atom Co, San Diego, CA 92186 USA.
[Domier, C. W.; Luhmann, N. C., Jr.] Univ Calif Davis, Davis, CA 95616 USA.
[Lee, W.; Park, H. K.] POSTECH, Pohang 790784, South Korea.
RP Yuh, HY (reprint author), Nova Photon Inc, Princeton, NJ 08540 USA.
EM hyuh@pppl.gov
NR 23
TC 27
Z9 27
U1 1
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAY
PY 2009
VL 16
IS 5
AR 056120
DI 10.1063/1.3129163
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 451WC
UT WOS:000266500600113
ER
PT J
AU Lunine, JI
Macintosh, B
Peale, S
AF Lunine, Jonathan I.
Macintosh, Bruce
Peale, Stanton
TI The detection and characterization of exoplanets
SO PHYSICS TODAY
LA English
DT Article
ID PLANETS; SPACE
C1 [Lunine, Jonathan I.] Univ Arizona, Tucson, AZ 85721 USA.
[Macintosh, Bruce] Lawrence Livermore Natl Lab, Livermore, CA USA.
[Peale, Stanton] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
RP Lunine, JI (reprint author), Univ Arizona, Tucson, AZ 85721 USA.
NR 17
TC 5
Z9 5
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0031-9228
J9 PHYS TODAY
JI Phys. Today
PD MAY
PY 2009
VL 62
IS 5
BP 46
EP 51
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 442DY
UT WOS:000265821400021
ER
PT J
AU Murray, C
AF Murray, Cherry
TI Accelerating into the future
SO PHYSICS WORLD
LA English
DT Editorial Material
C1 Lawrence Livermore Natl Lab, Amer Phys Soc, Livermore, CA 94550 USA.
RP Murray, C (reprint author), Lawrence Livermore Natl Lab, Amer Phys Soc, Livermore, CA 94550 USA.
EM camurray@llnl.gov
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-8585
J9 PHYS WORLD
JI Phys. World
PD MAY
PY 2009
VL 22
IS 5
BP 16
EP 17
PG 2
WC Physics, Multidisciplinary
SC Physics
GA 443LG
UT WOS:000265910700023
ER
PT J
AU Crease, RP
AF Crease, Robert P.
TI Critical Point 'Two cultures' turns 50
SO PHYSICS WORLD
LA English
DT Editorial Material
C1 [Crease, Robert P.] SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11790 USA.
[Crease, Robert P.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Crease, RP (reprint author), SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11790 USA.
EM rcrease@notes.cc.sunysb.edu
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8585
J9 PHYS WORLD
JI Phys. World
PD MAY
PY 2009
VL 22
IS 5
BP 19
EP 19
PG 1
WC Physics, Multidisciplinary
SC Physics
GA 443LG
UT WOS:000265910700024
ER
PT J
AU Blank, JG
Green, S
Blake, D
Valley, JW
Kita, NT
Treiman, A
Dobson, PF
AF Blank, J. G.
Green, Sj.
Blake, D.
Valley, J. W.
Kita, N. T.
Treiman, A.
Dobson, P. F.
TI An alkaline spring system within the Del Puerto Ophiolite (California,
USA): A Mars analog site
SO PLANETARY AND SPACE SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Exploring Mars and its Earth Analogues
CY JUN 19-23, 2007
CL Trento, ITALY
DE Mars analog; Dolomite; Alkaline springs; Biosignature
ID OXYGEN-ISOTOPE FRACTIONATION; 16S RIBOSOMAL-RNA; MODERN MARINE
STROMATOLITES; LITHIFIED MICRITIC LAMINAE; MARTIAN METEORITE ALH84001;
SULFATE-REDUCING BACTERIA; ALLAN HILLS 84001; MERIDIANI-PLANUM;
GEOCHEMICAL EVIDENCE; DOLOMITE FORMATION
AB Mars appears to have experienced little compositional differentiation of primitive lithosphere, and thus much of the surface of Mars is covered by mafic lavas. On Earth, mafic and ultramafic rocks present in ophiolites, oceanic crust and upper mantle that have been obducted onto land, are therefore good analogs for Mars. The characteristic mineralogy, aqueous geochemistry, and microbial communities of cold-water alkaline springs associated with these mafic and ultramafic rocks represent a particularly compelling analog for potential life-bearing systems. Serpentinization, the reaction of water with mafic minerals Such as olivine and pyroxene, yields fluids with unusual chemistry (Mg-OH and Ca-OH waters with pH values up to similar to 12), as well as heat and hydrogen gas that can sustain subsurface, chemosynthetic ecosystems. The recent observation of seeps from pole-facing crater and canyon walls in the higher Martian latitudes supports the hypothesis that even present conditions might allow for a rock-hosted chemosynthetic biosphere in near-surface regions of the Martian crust. The generation of methane within a zone of active serpentinization, through either abiogenic or biogenic processes, could account for the presence of methane detected in the Martian atmosphere. For all of these reasons, studies of terrestrial alkaline springs associated with mafic and ultramafic rocks are particularly timely. This study focuses on the alkaline Adobe Springs, emanating from mafic and ultramafic rocks of the California Coast Range, where a community of novel bacteria is associated with the precipitation of Mg-Ca carbonate cements. The carbonates may serve as a biosignature that could be used in the search for evidence of life on Mars. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Blank, J. G.] SETI Inst, Mountain View, CA 94043 USA.
[Blank, J. G.; Green, Sj.; Blake, D.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
[Valley, J. W.; Kita, N. T.] Univ Wisconsin, Dept Geol & Geophys, Madison, WI 53706 USA.
[Treiman, A.] Lunar & Planetary Inst, Houston, TX 77058 USA.
[Dobson, P. F.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Blank, JG (reprint author), SETI Inst, 515 N Whisman Rd, Mountain View, CA 94043 USA.
EM jblank@seti.org
RI Valley, John/B-3466-2011; Green, Stefan/C-8980-2011; Dobson,
Patrick/D-8771-2015; Kita, Noriko/H-8035-2016
OI Green, Stefan/0000-0003-2781-359X; Valley, John/0000-0003-3530-2722;
Dobson, Patrick/0000-0001-5031-8592; Kita, Noriko/0000-0002-0204-0765
NR 84
TC 34
Z9 37
U1 0
U2 20
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0032-0633
J9 PLANET SPACE SCI
JI Planet Space Sci.
PD MAY
PY 2009
VL 57
IS 5-6
BP 533
EP 540
DI 10.1016/j.pss.2008.11.018
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 456QX
UT WOS:000266863400003
ER
PT J
AU Crombe, K
Andrew, Y
Biewer, TM
Blanco, E
de Vries, PC
Giroud, C
Hawkes, NC
Meigs, A
Tala, T
von Hellermann, M
Zastrow, KD
AF Crombe, K.
Andrew, Y.
Biewer, T. M.
Blanco, E.
de Vries, P. C.
Giroud, C.
Hawkes, N. C.
Meigs, A.
Tala, T.
von Hellermann, M.
Zastrow, K-D
CA JET EFDA Contributors
TI Radial electric field in JET advanced tokamak scenarios with toroidal
field ripple
SO PLASMA PHYSICS AND CONTROLLED FUSION
LA English
DT Article
ID JOINT EUROPEAN TORUS; TRANSPORT BARRIERS; TURBULENCE
AB A dedicated campaign has been run on JET to study the effect of toroidal field (TF) ripple on plasma performance. Radial electric field measurements from experiments on a series of plasmas with internal transport barriers (ITBs) and different levels of ripple amplitude are presented. They have been calculated from charge exchange measurements of impurity ion temperature, density and rotation velocity profiles, using the force balance equation. The ion temperature and the toroidal and poloidal rotation velocities are compared in plasmas with both reversed and optimized magnetic shear profiles. Poloidal rotation velocity (v(theta)) in the ITB region is measured to be of the order of a few tens of km s(-1), significantly larger than the neoclassical predictions. Increasing levels of the TF ripple are found to decrease the ion temperature gradient in the ITB region, a measure for the quality of the ITB, and the maximum value of v(theta) is reduced. The poloidal rotation term dominates in the calculations of the total radial electric field (E(r)), with the largest gradient in E(r) measured in the radial region coinciding with the ITB.
C1 JET EFDA, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England.
[Andrew, Y.; de Vries, P. C.; Giroud, C.; Hawkes, N. C.; Meigs, A.; Zastrow, K-D] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England.
[Biewer, T. M.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Blanco, E.] Asociac EURATOM CIEMAT, Lab Nacl Fus, Madrid, Spain.
[Tala, T.] Assoc EURATOM Tekes, VTT Tech Res Ctr Finland, FIN-02044 Espoo, Finland.
[von Hellermann, M.] EURATOM, FOM Inst Plasma Phys Rijnhuizen, NL-3430 BE Nieuwegein, Netherlands.
EM Kristel.Crombe@jet.uk
RI Blanco, Emilio/F-8893-2016;
OI Blanco, Emilio/0000-0002-1323-7547; Biewer, Theodore/0000-0001-7456-3509
NR 15
TC 10
Z9 11
U1 2
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0741-3335
J9 PLASMA PHYS CONTR F
JI Plasma Phys. Control. Fusion
PD MAY
PY 2009
VL 51
IS 5
AR 055005
DI 10.1088/0741-3335/51/5/055005
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 438VQ
UT WOS:000265584300005
ER
PT J
AU Sattin, F
Agostini, M
Scarin, P
Vianello, N
Cavazzana, R
Marrelli, L
Serianni, G
Zweben, SJ
Maqueda, RJ
Yagi, Y
Sakakita, H
Koguchi, H
Kiyama, S
Hirano, Y
Terry, JL
AF Sattin, F.
Agostini, M.
Scarin, P.
Vianello, N.
Cavazzana, R.
Marrelli, L.
Serianni, G.
Zweben, S. J.
Maqueda, R. J.
Yagi, Y.
Sakakita, H.
Koguchi, H.
Kiyama, S.
Hirano, Y.
Terry, J. L.
TI On the statistics of edge fluctuations: comparative study between
various fusion devices
SO PLASMA PHYSICS AND CONTROLLED FUSION
LA English
DT Article
ID SCRAPE-OFF-LAYER; ALCATOR-C-MOD; SELF-ORGANIZED CRITICALITY; RFX-MOD;
SPHERICAL TORUS; TPE-RX; TURBULENCE; TRANSPORT; PLASMAS; INTERMITTENCY
AB In this paper we present a statistical study of edge fluctuations taken with the gas puffing imaging (GPI) diagnostics. We carry out a comparison of GPI signal from an extensive database including four devices (two tokamaks and two reversed field pinches). The data are analysed in terms of their statistical moments Skewness and Kurtosis, as done in B Labit et al (2007 Phys. Rev. Lett. 98 255002). The data align along parabolic curves, although different from machine to machine, with some spread around the best-fitting curve. A discussion about the meaning of the parabolic trend as well as the departure of real data from it is provided. A phenomenological model is finally provided, attempting to accommodate experimental evidence.
C1 [Sattin, F.; Agostini, M.; Scarin, P.; Vianello, N.; Cavazzana, R.; Marrelli, L.; Serianni, G.] Assoc EURATOM ENEA Fus, Consorzio RFX, Padua, Italy.
[Zweben, S. J.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Maqueda, R. J.] Nova Photon, Princeton, NJ 08540 USA.
[Yagi, Y.; Sakakita, H.; Koguchi, H.; Kiyama, S.; Hirano, Y.] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan.
[Terry, J. L.] Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA.
RP Sattin, F (reprint author), Assoc EURATOM ENEA Fus, Consorzio RFX, Corso Stati Uniti 4, Padua, Italy.
RI Sattin, Fabio/B-5620-2013; Marrelli, Lionello/G-4451-2013; Vianello,
Nicola/B-6323-2008;
OI Marrelli, Lionello/0000-0001-5370-080X; Vianello,
Nicola/0000-0003-4401-5346; AGOSTINI, MATTEO/0000-0002-3823-1002
FU European Communities; Ministry of Education, Culture, Sports, Science
and Technology
FX This work was supported by the European Communities under the contract
of Association between EURATOM/ENEA. The views and opinions expressed
herein do not necessarily reflect those of the European Commission. The
TPE-RX program was financially supported by the Budget for Nuclear
Research of the Ministry of Education, Culture, Sports, Science and
Technology, based on the screening and counselling of the Atomic Energy
Commission. S Cappello read the manuscript and provided several useful
suggestions.
NR 48
TC 22
Z9 22
U1 2
U2 10
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0741-3335
J9 PLASMA PHYS CONTR F
JI Plasma Phys. Control. Fusion
PD MAY
PY 2009
VL 51
IS 5
AR 055013
DI 10.1088/0741-3335/51/5/055013
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 438VQ
UT WOS:000265584300013
ER
PT J
AU Simakov, AN
AF Simakov, Andrei N.
TI A drift-ordered short mean-free path description of a partially ionized
magnetized plasma
SO PLASMA PHYSICS AND CONTROLLED FUSION
LA English
DT Article
ID ION FLOW SHEAR; COLLISIONAL PLASMA; NEUTRAL DIFFUSION; FLUID EQUATIONS;
TRANSPORT; EDGE; TOKAMAK; FIELD; GAS; ROTATION
AB Neutral particles that are present at the edge of plasma magnetic confinement devices can play an important role in energy and momentum transport, and their effects should be accounted for. This work uses the drift ordering to derive a closed fluid description for a collisional, magnetized, partially ionized plasma. Charge-exchange, ionization and recombination processes are taken into account. It is assumed that electron distribution function is unaffected by atomic processes, so that electron-ion momentum and energy exchange are described by the usual expressions for a fully ionized plasma, and that neutral neutral collisions are unimportant. The collisional fluid equations derived herein generalize the drift-ordered description of a fully ionized collisional plasma (Catto P J et al 2004 Phys. Plasmas 1190), agree with the MHD-ordered description of a partially ionized plasma (Helander P et al 1994 Phys. Plasmas 1 3174) in the large-flow limit and can be used to describe both turbulent and collisional behavior of a partially ionized plasma.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Simakov, AN (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
OI Simakov, Andrei/0000-0001-7064-9153
NR 32
TC 1
Z9 1
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0741-3335
J9 PLASMA PHYS CONTR F
JI Plasma Phys. Control. Fusion
PD MAY
PY 2009
VL 51
IS 5
AR 055006
DI 10.1088/0741-3335/51/5/055006
PG 17
WC Physics, Fluids & Plasmas
SC Physics
GA 438VQ
UT WOS:000265584300006
ER
PT J
AU West, WP
Groth, M
Hyatt, AW
Jackson, GL
Wade, MR
Greenfield, CM
Politzer, PA
AF West, W. P.
Groth, M.
Hyatt, A. W.
Jackson, G. L.
Wade, M. R.
Greenfield, C. M.
Politzer, P. A.
TI The maintenance of good wall conditions and high performance operation
on DIII-D over extended periods without boronization
SO PLASMA PHYSICS AND CONTROLLED FUSION
LA English
DT Article
ID TOKAMAK OPERATION; PARTICLE CONTROL; DIVERTOR; CONFINEMENT; PLASMAS;
ITER
AB High performance plasmas and daily reference shots (DRSs) with both L-mode and H-mode phases were used to demonstrate the maintenance of good wall conditions over similar to 7000 s of plasma operation in DIII-D with no intervening boronizations or high temperature bakes during each of the 2006 and 2007 campaigns. High performance discharges with high normalized beta and confinement factor and good density control over the duration of the high-power beam injection period were very repeatable over the course of these campaigns. High performance operation was also demonstrated after a six week entry vent followed by the standard high temperature bake at 350 degrees C and plasma conditioning, but prior to a boronization. Over the 2006 and 2007 campaigns, the DRS database indicated little to no secular increase in impurity content. Oxygen content and nickel line emission were higher after the entry vent, but were still minor contributors to plasma contamination compared with carbon. Because DIII-D has a plasma facing surface that is >95% graphite, we take this as a demonstration that erosion of boronization films used for wall conditioning will not be a limitation to establishing long-pulse high performance discharges in the new generation of superconducting tokamaks if graphite is used as the primary plasma facing material.
C1 [West, W. P.; Hyatt, A. W.; Jackson, G. L.; Wade, M. R.; Greenfield, C. M.; Politzer, P. A.] Gen Atom Co, San Diego, CA 92186 USA.
[Groth, M.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP West, WP (reprint author), Gen Atom Co, POB 85608, San Diego, CA 92186 USA.
RI Groth, Mathias/G-2227-2013
NR 23
TC 0
Z9 0
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0741-3335
J9 PLASMA PHYS CONTR F
JI Plasma Phys. Control. Fusion
PD MAY
PY 2009
VL 51
IS 5
AR 055014
DI 10.1088/0741-3335/51/5/055014
PG 12
WC Physics, Fluids & Plasmas
SC Physics
GA 438VQ
UT WOS:000265584300014
ER
PT J
AU Wang, CJ
Srivastava, N
Scherrer, S
Jang, PR
Dibble, TS
Duan, YX
AF Wang, Chuji
Srivastava, Nimisha
Scherrer, Susan
Jang, Ping-Rey
Dibble, Theodore S.
Duan, Yixiang
TI Optical diagnostics of a low power-low gas flow rates
atmospheric-pressure argon plasma created by a microwave plasma torch
SO PLASMA SOURCES SCIENCE & TECHNOLOGY
LA English
DT Article
ID CAVITY RINGDOWN SPECTROSCOPY; INDUCTIVELY-COUPLED PLASMAS; STATE
DISTRIBUTION FUNCTION; DIODE-LASER ABSORPTION; THOMSON SCATTERING;
EMISSION-SPECTROSCOPY; ISOTOPIC MEASUREMENTS; DOWN SPECTROSCOPY;
ELECTRON-DENSITY; AIR PLASMA
AB We employ a suite of optical techniques, namely, visual imaging, optical emission spectroscopy and cavity ringdown spectroscopy (CRDS), to characterize a low power, low gas flow rates, atmospheric-pressure argon microwave induced plasma. The plasma is created by a microwave plasma torch, which is excited by a 2.45 GHz microwave with powers ranging from 60 to 120W. A series of plasma images captured in a time-resolution range of as fine as 10 mu s shows that the converging point is actually a time- averaged visual effect and the converging point does not exist when the plasma is visualized under high time resolution, e. g. < 2 ms. Simulations of the emission spectra of OH, N-2 and N-2(+) in the range 200-450 nm enable the plasma electronic excitation temperature (T-exc) to be determined at 8000-9000 K, while the vibrational temperature (T-v), the rotational temperature (T-r) and the gas temperature (T-g) at different locations along the axis of the plasma column are all determined to be in the range 1800-2200 K. Thermal equilibrium properties of the plasma are discussed. OH radical concentrations along the plasma column axis are measured by CRDS and the concentrations are in the range 1.6 x 10(13)-3.0 x 10(14) cm(-3) with the highest density at the tail of the plasma column. The upper limit of electron density ne is estimated to be 5.0 x 10(14) cm(-3) from the Lorentzian component of the broadened lineshape obtained by ringdown spectral scans of the rovibrational line S-21 of the OH A-X (0-0) band.
C1 [Wang, Chuji; Srivastava, Nimisha; Scherrer, Susan; Jang, Ping-Rey] Mississippi State Univ, Dept Phys & Astron, Starkville, MS 39759 USA.
[Wang, Chuji; Srivastava, Nimisha; Scherrer, Susan; Jang, Ping-Rey] Mississippi State Univ, Inst Clean Energy Technol, Starkville, MS 39759 USA.
[Dibble, Theodore S.] SUNY Coll Environm Sci & Forestry, Dept Chem, Syracuse, NY 13210 USA.
[Duan, Yixiang] Los Alamos Natl Lab, C ACS, Los Alamos, NM 87545 USA.
RP Wang, CJ (reprint author), Mississippi State Univ, Dept Phys & Astron, POB 5167, Mississippi State, MS 39762 USA.
EM cw175@msstate.edu
RI Dibble, Theodore/D-1341-2012;
OI Dibble, Theodore/0000-0002-0023-8233
FU National Science Foundation [CTS-0626302]
FX This work is supported by the National Science Foundation through grant
#CTS-0626302.
NR 61
TC 20
Z9 20
U1 1
U2 26
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0963-0252
EI 1361-6595
J9 PLASMA SOURCES SCI T
JI Plasma Sources Sci. Technol.
PD MAY
PY 2009
VL 18
IS 2
AR 025030
DI 10.1088/0963-0252/18/2/025030
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 438UL
UT WOS:000265580800033
ER
PT J
AU Wood, N
Bhattacharya, T
Keele, BF
Giorgi, E
Liu, M
Gaschen, B
Daniels, M
Ferrari, G
Haynes, BF
McMichael, A
Shaw, GM
Hahn, BH
Korber, B
Seoighe, C
AF Wood, Natasha
Bhattacharya, Tanmoy
Keele, Brandon F.
Giorgi, Elena
Liu, Michael
Gaschen, Brian
Daniels, Marcus
Ferrari, Guido
Haynes, Barton F.
McMichael, Andrew
Shaw, George M.
Hahn, Beatrice H.
Korber, Bette
Seoighe, Cathal
TI HIV Evolution in Early Infection: Selection Pressures, Patterns of
Insertion and Deletion, and the Impact of APOBEC
SO PLOS PATHOGENS
LA English
DT Article
ID HUMAN-IMMUNODEFICIENCY-VIRUS; AMINO-ACID SITES; NEUTRALIZING
ANTIBODY-RESPONSES; DETECTING POSITIVE SELECTION; CYTOTOXIC
T-LYMPHOCYTES; IN-VIVO; ENVELOPE GLYCOPROTEIN; STATISTICAL-METHODS;
ADAPTIVE EVOLUTION; LIKELIHOOD MODELS
AB The pattern of viral diversification in newly infected individuals provides information about the host environment and immune responses typically experienced by the newly transmitted virus. For example, sites that tend to evolve rapidly across multiple early-infection patients could be involved in enabling escape from common early immune responses, could represent adaptation for rapid growth in a newly infected host, or could represent reversion from less fit forms of the virus that were selected for immune escape in previous hosts. Here we investigated the diversification of HIV-1 env coding sequences in 81 very early B subtype infections previously shown to have resulted from transmission or expansion of single viruses (n = 78) or two closely related viruses (n = 3). In these cases, the sequence of the infecting virus can be estimated accurately, enabling inference of both the direction of substitutions as well as distinction between insertion and deletion events. By integrating information across multiple acutely infected hosts, we find evidence of adaptive evolution of HIV-1 env and identify a subset of codon sites that diversified more rapidly than can be explained by a model of neutral evolution. Of 24 such rapidly diversifying sites, 14 were either i) clustered and embedded in CTL epitopes that were verified experimentally or predicted based on the individual's HLA or ii) in a nucleotide context indicative of APOBEC-mediated G-to-A substitutions, despite having excluded heavily hypermutated sequences prior to the analysis. In several cases, a rapidly evolving site was embedded both in an APOBEC motif and in a CTL epitope, suggesting that APOBEC may facilitate early immune escape. Ten rapidly diversifying sites could not be explained by CTL escape or APOBEC hypermutation, including the most frequently mutated site, in the fusion peptide of gp41. We also examined the distribution, extent, and sequence context of insertions and deletions, and we provide evidence that the length variation seen in hypervariable loop regions of the envelope glycoprotein is a consequence of selection and not of mutational hotspots. Our results provide a detailed view of the process of diversification of HIV-1 following transmission, highlighting the role of CTL escape and hypermutation in shaping viral evolution during the establishment of new infections.
C1 [Wood, Natasha; Seoighe, Cathal] Univ Cape Town, Inst Infect Dis & Mol Med, ZA-7925 Cape Town, South Africa.
[Wood, Natasha; Seoighe, Cathal] Ctr High Performance Comp, Cape Town, South Africa.
[Bhattacharya, Tanmoy; Giorgi, Elena; Gaschen, Brian; Daniels, Marcus; Korber, Bette] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM USA.
[Bhattacharya, Tanmoy; Korber, Bette] Santa Fe Inst, Santa Fe, NM 87501 USA.
[Keele, Brandon F.; Shaw, George M.; Hahn, Beatrice H.] Univ Alabama, Birmingham, NM USA.
[Giorgi, Elena] Univ Massachusetts, Dept Math & Stat, Amherst, MA 01003 USA.
[Liu, Michael; McMichael, Andrew] Univ Oxford, John Radcliffe Hosp, Weatherall Inst Mol Med, Oxford OX3 9DU, England.
[Ferrari, Guido; Haynes, Barton F.] Duke Univ, Durham, NC USA.
[Seoighe, Cathal] Natl Univ Ireland Univ Coll Galway, Sch Math Stat & Appl Math, Galway, Ireland.
RP Wood, N (reprint author), Univ Cape Town, Inst Infect Dis & Mol Med, ZA-7925 Cape Town, South Africa.
EM cseoighe@gmail.com
RI Bhattacharya, Tanmoy/J-8956-2013; Ferrari, Guido/A-6088-2015;
OI Bhattacharya, Tanmoy/0000-0002-1060-652X; Korber,
Bette/0000-0002-2026-5757
FU National Institutes of Health to the Center for HIV/AIDS Vaccine
Immunology (CHAVI); NIH [AI67854, AI27767]; Bill & Melinda Gates
Foundation [37874]; UAB Center for AIDS Research
FX This work was supported by a grant from the National Institutes of
Health to the Center for HIV/AIDS Vaccine Immunology (CHAVI), by grants
from the NIH (AI67854, AI27767), the Bill & Melinda Gates Foundation
(#37874), and by sequencing core facilities of the UAB Center for AIDS
Research. The funders had no role in study design, data collection and
analysis, decision to publish, or preparation of the manuscript.
NR 65
TC 97
Z9 98
U1 1
U2 3
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1553-7366
J9 PLOS PATHOG
JI PLoS Pathog.
PD MAY
PY 2009
VL 5
IS 5
AR e1000414
DI 10.1371/journal.ppat.1000414
PG 16
WC Microbiology; Parasitology; Virology
SC Microbiology; Parasitology; Virology
GA 459FH
UT WOS:000267085800041
PM 19424423
ER
PT J
AU Ingersoll, DT
AF Ingersoll, D. T.
TI Deliberately small reactors and the second nuclear era
SO PROGRESS IN NUCLEAR ENERGY
LA English
DT Review
DE Small medium reactors; Deliberately small reactors; Second nuclear era;
Nuclear renaissance; New reactor designs
AB Smaller sized nuclear reactors were instrumental during the pioneering days of commercial nuclear power to facilitate the development and demonstration of early reactor technologies and to establish operational experience for the fledgling nuclear power industry. As the U.S. embarks on its "second nuclear era," the question becomes: Will smaller sized plants have a significant role in meeting the nation's needs for electricity and other energy demands? A brief review of our nuclear history is presented relative to plant size considerations, followed by a review of several commonly cited benefits of small reactors. Several "deliberately small" designs currently being developed in the U.S. are briefly described, as well as some of the technical and institutional challenges faced by these designs. Deliberately small reactors offer substantial benefits in safety. security, operational flexibilities and economics, and they are well positioned to figure prominently in the second nuclear era. (C) 2009 Elsevier Ltd. All rights reserved.
C1 Oak Ridge Natl Lab, Nucl Technol Programs Off, Oak Ridge, TN 37831 USA.
RP Ingersoll, DT (reprint author), Oak Ridge Natl Lab, Nucl Technol Programs Off, POB 2008, Oak Ridge, TN 37831 USA.
EM ingersolldt@ornl.gov
FU DOE Office of Nuclear Energy; Global Nuclear Energy Partnership program
FX The author would like to thank the many supporters and developers of
SMRs who provided information and graphics for this paper, and also Gary
Mays, Don Williams, and Brad Williams for their thoughtful review and
comments on the draft manuscript. The author especially wishes to thank
Robert Price and the DOE Office of Nuclear Energy for the opportunity to
lead the Grid-Appropriate Reactor program element within the Global
Nuclear Energy Partnership program. The personal contacts and technical
content of that assignment contributed greatly to the perspectives
shared in this paper, and solidified the author's passion for
deliberately small reactors.
NR 32
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U1 4
U2 27
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0149-1970
J9 PROG NUCL ENERG
JI Prog. Nucl. Energy
PD MAY-JUL
PY 2009
VL 51
IS 4-5
BP 589
EP 603
DI 10.1016/j.pnucene.2009.01.003
PG 15
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 438QI
UT WOS:000265570100001
ER
PT J
AU Wilson, WB
Perry, RT
Chariton, WS
Parish, TA
AF Wilson, W. B.
Perry, R. T.
Chariton, W. S.
Parish, T. A.
TI Sources: A code for calculating (alpha, n), spontaneous fission, and
delayed neutron sources and spectra
SO PROGRESS IN NUCLEAR ENERGY
LA English
DT Article
DE Alpha reactions; Spontaneous fission; Delayed neutrons; Actinide
isotopes; Neutron production
ID LIGHT-ELEMENTS; BOMBARDMENT; PARTICLES; YIELDS
AB SOURCES is a computer code that determines neutron production rates and spectra from (alpha, n) reactions, spontaneous fission, and delayed neutron emission due to the decay of radionuclides in homogeneous media, interface problems, and three-region interface problems. The code is also capable of calculating the neutron production rates due to (alpha, n) reactions induced by a monoenergetic beam of alpha particles incident on a slab of target material. The (alpha, n) spectra are calculated using an assumed isotropic angular distribution in the center-of-mass system with a library of 107 nuclide decay alpha-particle spectra, 24 sets of measured and/or evaluated (alpha, n) cross sections and product nuclide level branching fractions, and functional alpha particle stopping cross sections for Z < 106. Spontaneous fission sources and spectra are calculated with evaluated half-life, spontaneous fission branching, and Watt spectrum parameters for 44 actinides. The delayed neutron spectra are taken from an evaluated library of 105 precursors. The code outputs the magnitude and spectra of the resultant neutron sources. It also provides an analysis of the contributions to that source by each nuclide in the problem. Published by Elsevier Ltd.
C1 [Wilson, W. B.; Perry, R. T.; Chariton, W. S.; Parish, T. A.] Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
RP Perry, RT (reprint author), Los Alamos Natl Lab, Box 1663, Los Alamos, NM 87544 USA.
EM rtperry@lanl.gov
FU Los Alamos National Laboratory
FX The present version of SOURCES would not be possible without the
contributions of many people. The authors acknowledge E. D. Arthur, M.
Bozoian, T. H. Brown, J. Devaney, T. R. England, G. P. Estes, D. G.
Madland, J. A. Sattelberger, Erik Shores, and J. E. Stewart, all from
the Los Alamos National Laboratory, for their contributions to the
development of the code.
NR 35
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U1 0
U2 7
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0149-1970
J9 PROG NUCL ENERG
JI Prog. Nucl. Energy
PD MAY-JUL
PY 2009
VL 51
IS 4-5
BP 608
EP 613
DI 10.1016/j.pnucene.2008.11.007
PG 6
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 438QI
UT WOS:000265570100003
ER
PT J
AU Zhang, J
Kapernick, R
AF Zhang, J.
Kapernick, R.
TI Oxygen chemistry in liquid sodium-potassium systems
SO PROGRESS IN NUCLEAR ENERGY
LA English
DT Article
DE Liquid sodium/NaK; Coolant; Oxygen chemistry; Corrosion
ID ALKALI-METALS; THERMODYNAMIC PROPERTIES; STRUCTURAL-MATERIALS;
STAINLESS-STEEL; TERNARY OXIDES; ALLOYS; CORROSION; SOLUBILITY;
COMPATIBILITY; IMPURITIES
AB Oxygen is one of the main contaminates when using an alkali metal as a coolant in a nuclear reactor system. Some oxygen will be present in the coolant at the start of operation, and during normal operation some oxygen may diffuse through the clad into the coolant. Assuming UO(2) fuel, a breach of the cladding of one or more fuel pins, and with the coolant contacting the fuel pellets, the oxygen level in the coolant can increase. The present study examines oxygen chemistry in liquid NaK by extending the existing knowledge of oxygen chemistry in liquid sodium, New explanations and correlations for the formation of oxygen compounds in the liquid metal have been developed. This study includes the effect of oxygen level, measurement and control methods, and the effects of oxygen and oxygen compounds on the compatibility between the liquid and the structural materials. (C) 2009 Elsevier Ltd. All rights reserved.
C1 [Zhang, J.; Kapernick, R.] Los Alamos Natl Lab, Decis & Applicat Div, Los Alamos, NM 87544 USA.
RP Zhang, J (reprint author), Los Alamos Natl Lab, Decis & Applicat Div, POB 1663, Los Alamos, NM 87544 USA.
EM jszhang@lanl.gov
RI Zhang, Jinsuo/H-4717-2012
OI Zhang, Jinsuo/0000-0002-3412-7769
NR 33
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U1 0
U2 7
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0149-1970
J9 PROG NUCL ENERG
JI Prog. Nucl. Energy
PD MAY-JUL
PY 2009
VL 51
IS 4-5
BP 614
EP 623
DI 10.1016/j.pnucene.2008.12.001
PG 10
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 438QI
UT WOS:000265570100004
ER
PT J
AU Kiss, C
Temirov, J
Chasteen, L
Waldo, GS
Bradbury, ARM
AF Kiss, Csaba
Temirov, Jamshid
Chasteen, Leslie
Waldo, Geoffrey S.
Bradbury, Andrew R. M.
TI Directed evolution of an extremely stable fluorescent protein
SO PROTEIN ENGINEERING DESIGN & SELECTION
LA English
DT Article
DE directed evolution; fluorescent protein; thermostability
ID SENSITIVE FOLDING MUTATIONS; THERMOSTABLE ALPHA-AMYLASE; P22 TAILSPIKE
PROTEIN; IN-VITRO EVOLUTION; GLOBAL SUPPRESSORS; THERMAL-STABILITY;
SURFACE DISPLAY; BETA-LACTAMASE; DOMAIN; STABILIZATION
AB In this paper we describe the evolution of eCGP123, an extremely stable green fluorescent protein based on a previously described fluorescent protein created by consensus engineering (CGP: consensus green protein). eCGP123 could not be denatured by a standard thermal melt, preserved almost full fluorescence after overnight incubation at 80 degrees C and possessed a free energy of denaturation of 12.4 kcal/mol. It was created from CGP by a recursive process involving the sequential introduction of three destabilizing heterologous inserts, evolution to overcome the destabilization and finally 'removal' of the destabilizing insert by gene synthesis. We believe that this approach may be generally applicable to the stabilization of other proteins.
C1 [Kiss, Csaba; Temirov, Jamshid; Chasteen, Leslie; Waldo, Geoffrey S.; Bradbury, Andrew R. M.] Los Alamos Natl Lab, Biosci Div, Los Alamos, NM USA.
RP Bradbury, ARM (reprint author), Los Alamos Natl Lab, Biosci Div, Los Alamos, NM USA.
EM amb@lanl.gov
OI Bradbury, Andrew/0000-0002-5567-8172
FU LANL lab directed research funds (LDRD-DR); DOE GTL
FX A. R. M. B. is grateful to LANL lab directed research funds (LDRD-DR)
and the DOE GTL program for funding.
NR 62
TC 29
Z9 29
U1 0
U2 5
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 1741-0126
J9 PROTEIN ENG DES SEL
JI Protein Eng. Des. Sel.
PD MAY
PY 2009
VL 22
IS 5
BP 313
EP 323
DI 10.1093/protein/gzp006
PG 11
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA 434LV
UT WOS:000265277100004
PM 19364809
ER
PT J
AU Boschek, CB
Apiyo, DO
Soares, TA
Engelmann, HE
Pefaur, NB
Straatsma, TP
Baird, CL
AF Boschek, Curt B.
Apiyo, David O.
Soares, Thereza A.
Engelmann, Heather E.
Pefaur, Noah B.
Straatsma, Tjerk P.
Baird, Cheryl L.
TI Engineering an ultra-stable affinity reagent based on Top7
SO PROTEIN ENGINEERING DESIGN & SELECTION
LA English
DT Article
DE engineering affinity; molecular dynamics simulations; protein scaffold;
protein stability; Top7
ID MOLECULAR-DYNAMICS SIMULATIONS; SITE-DIRECTED MUTAGENESIS;
MONOCLONAL-ANTIBODY; BINDING-PROTEINS; CD4; DESIGN; ACTIVATION;
DIVERSITY; STABILITY; DOMAINS
AB Antibodies are widely used for diagnostic and therapeutic applications because of their sensitive and specific recognition of a wide range of targets; however, their application is limited by their structural complexity. More demanding applications require greater stability than can be achieved by immunoglobulin-based reagents. Highly stable, protein-based affinity reagents are being investigated for this role with the goal of identifying a suitable scaffold that can attain specificity and sensitivity similar to that of antibodies while performing under conditions where antibodies fail. We have engineered Top7-025EFa highly stable, computationally designed protein-025EFto specifically bind human CD4 by inserting a peptide sequence derived from a CD4-specific antibody. Molecular dynamics simulations were used to evaluate the structural effect of the peptide insertion at a specific site within Top7 and suggest that this Top7 variant retains conformational stability over 100 degrees C. This engineered protein specifically binds CD4 and, consistent with simulations, is extremely resistant to thermal and chemical denaturation-025EFretaining its secondary structure up to at least 95 degrees C and requiring 6 M guanidine to completely unfold. This CD4-specific protein demonstrates the functionality of Top7 as a viable scaffold for use as a general affinity reagent which could serve as a robust and inexpensive alternative to antibodies.
C1 [Boschek, Curt B.; Apiyo, David O.; Engelmann, Heather E.; Pefaur, Noah B.; Baird, Cheryl L.] Pacific NW Natl Lab, Cell Biol & Biochem Grp, Richland, WA 99352 USA.
[Soares, Thereza A.; Straatsma, Tjerk P.] Pacific NW Natl Lab, Computat Biol & Bioinformat Grp, Richland, WA 99352 USA.
RP Baird, CL (reprint author), Pacific NW Natl Lab, Cell Biol & Biochem Grp, POB 999,MS K4-12, Richland, WA 99352 USA.
EM cheryl.baird@pnl.gov
RI Baird, Cheryl/F-6569-2011; Soares, Thereza/G-1065-2010
OI Soares, Thereza/0000-0002-5891-6906
FU Department of Energy's Office of Biological and Environmental Research
located at Pacific Northwest National Laboratory; United States
Department of Energy (Laboratory Directed Research and Development)
FX This work was supported by the United States Department of Energy
(Laboratory Directed Research and Development).
NR 40
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U1 0
U2 5
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 1741-0126
J9 PROTEIN ENG DES SEL
JI Protein Eng. Des. Sel.
PD MAY
PY 2009
VL 22
IS 5
BP 325
EP 332
DI 10.1093/protein/gzp007
PG 8
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA 434LV
UT WOS:000265277100005
PM 19321520
ER
PT J
AU Gassman, NR
Ho, SO
Korlann, Y
Chiang, J
Wu, Y
Perry, LJ
Kim, Y
Weiss, S
AF Gassman, Natalie R.
Ho, Sam On
Korlann, You
Chiang, Janet
Wu, Yim
Perry, L. Jeanne
Kim, Younggyu
Weiss, Shimon
TI In vivo assembly and single-molecule characterization of the
transcription machinery from Shewanella oneidensis MR-1
SO PROTEIN EXPRESSION AND PURIFICATION
LA English
DT Article
DE Shewanella oneidensis; RNA polymerase; sigma Factor; Co-overexpression;
Single-molecule spectroscopy; Alternating-laser excitation
ID COLI RNA-POLYMERASE; ALTERNATING-LASER EXCITATION; ESCHERICHIA-COLI;
SIGMA(70) SUBUNIT; STRUCTURAL BASIS; GENOME SEQUENCE; LAC PROMOTER; DNA
COMPLEX; INITIATION; GENE
AB Harnessing the new bioremediation and biotechnology applications offered by the dissimilatory metal-reducing bacteria, Shewanella oneidensis MR-1, requires a clear understanding of its transcription machinery, a pivotal component in maintaining vitality and in responding to various conditions, including starvation and environmental stress. Here, we have reconstituted the S. oneidensis RNA polymerase (RNAP) core in vivo by generating a co-overexpression construct that produces a long polycistronic mRNA encoding all of the core subunits (alpha, beta, beta', and omega) and verified that this reconstituted core is capable of forming fully functional holoenzymes with the S. oneidensis sigma factors sigma(70), sigma(38), sigma(32), and sigma(24). Further, to demonstrate the applications for this reconstituted core, we report the application of single-molecule fluorescence resonance energy transfer (smFRET) assays to monitor the mechanisms of transcription by the S. oneidensis sigma(70)-RNAP holoenyzme. These results show that the reconstituted transcription machinery from S. oneidensis, like its Escherichia coli counterpart, "scrunches" the DNA into its active center during initial transcription, and that as the holoenzyme transitions into elongation, the release of sigma(70) is non-obligatory. (C) 2009 Published by Elsevier Inc.
C1 [Gassman, Natalie R.; Ho, Sam On; Korlann, You; Kim, Younggyu; Weiss, Shimon] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA.
[Wu, Yim; Perry, L. Jeanne] Univ Calif Los Angeles, DOE, Inst Proteom & Genom, Los Angeles, CA 90095 USA.
[Weiss, Shimon] Univ Calif Los Angeles, Dept Physiol, Los Angeles, CA 90095 USA.
[Weiss, Shimon] Univ Calif Los Angeles, Calif Nanosyst Inst, Los Angeles, CA 90095 USA.
RP Kim, Y (reprint author), Univ Calif Los Angeles, Dept Chem & Biochem, 607 Charles E Young Dr E, Los Angeles, CA 90095 USA.
EM ykim@chem.ucla.edu; sweiss@chem.ucla.edu
RI weiss, shimon/B-4164-2009;
OI weiss, shimon/0000-0002-0720-5426; Gassman, Natalie/0000-0002-8488-2332
FU Department of Energy [FG03-02ER63339]; NIH [GM069709-01]
FX We thank Dr. M. Uljana Mayer Dr. Liang Shi for providing the S.
oneidensis RNAP subunits clones, and Dr. Mayer, Devdoot Majumdar, and
Yuval Ebenstein for critical reading of the article; the Dr. Jay D.
Gralla group for help with the radioactive transcription assays; Irina
Sorokina for helpful discussion of the MALDI-MS data. We also
acknowledge the Shewanella Federation for helpful discussions. This work
was supported by Department of Energy Grant FG03-02ER63339 and NIH Grant
GM069709-01 to S.W.
NR 69
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U1 0
U2 5
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1046-5928
EI 1096-0279
J9 PROTEIN EXPRES PURIF
JI Protein Expr. Purif.
PD MAY
PY 2009
VL 65
IS 1
BP 66
EP 76
DI 10.1016/j.pep.2008.11.013
PG 11
WC Biochemical Research Methods; Biochemistry & Molecular Biology;
Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA 416LU
UT WOS:000264008400009
PM 19111618
ER
PT J
AU Fleissner, MR
Cascio, D
Hubbell, WL
AF Fleissner, Mark R.
Cascio, Duilio
Hubbell, Wayne L.
TI Structural origin of weakly ordered nitroxide motion in spin-labeled
proteins
SO PROTEIN SCIENCE
LA English
DT Article
DE site-directed Spin Labeling; nitroxide anisotropic motion; nitroxide
crystal structures
ID SIDE-CHAIN STRUCTURE; T4 LYSOZYME; ALPHA-HELIX; EPR-SPECTRA; DYNAMICS;
ACTIVATION; BINDING; CONFORMATIONS; DETERMINANTS; MUTAGENESIS
AB A disulfide-linked nitroxide side chain (R1) used in site-directed spin labeling of proteins often exhibits an EPR spectrum characteristic of a weakly ordered z-axis anisotropic motion at topographically diverse surface sites, including those on helices, loops and edge strands of beta-sheets. To elucidate the origin of this motion, the first crystal structures of R1 that display simple z-axis anisotropic motion at solvent-exposed helical sites ( 131 and 151) and a loop site ( 82) in T4 lysozyme have been determined. Structures of 131R1 and 151R1 determined at cryogenic or ambient temperature reveal an intraresidue C(alpha)-H center dot center dot center dot S(delta) interaction that immobilizes the disulfide group, consistent with a model in which the internal motions of R1 are dominated by rotations about the two terminal bonds ( Columbus, Kalai, Jeko, Hideg, and Hubbell, Biochemistry 2001; 40: 3828-3846). Remarkably, the 131R1 side chain populates two rotamers equally, but the EPR spectrum reflects a single dominant dynamic population, showing that the two rotamers have similar internal motion determined by the common disulfide-backbone interaction. The anisotropic motion for loop residue 82R1 is also accounted for by a common disulfide-backbone interaction, showing that the interaction does not require a specific secondary structure. If the above observations prove to be general, then significant variations in order and rate for R1 at noninteracting solvent-exposed helical and loop sites can be assigned to backbone motion because the internal motion is essentially constant.
C1 [Hubbell, Wayne L.] Univ Calif Los Angeles, Sch Med, Jules Stein Eye Inst, Los Angeles, CA 90095 USA.
[Fleissner, Mark R.; Hubbell, Wayne L.] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA.
[Cascio, Duilio] Univ Calif Los Angeles, UCLA DOE Inst Genom & Prote, Los Angeles, CA 90095 USA.
RP Hubbell, WL (reprint author), Univ Calif Los Angeles, Sch Med, Jules Stein Eye Inst, Los Angeles, CA 90095 USA.
EM hubbellw@jsei.ucla.edu
FU NEI NIH HHS [5T32EY007026, R01 EY005216, R01 EY005216-29, EY05216];
NIGMS NIH HHS [GM07185]
NR 55
TC 58
Z9 58
U1 0
U2 10
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0961-8368
J9 PROTEIN SCI
JI Protein Sci.
PD MAY
PY 2009
VL 18
IS 5
BP 893
EP 908
DI 10.1002/pro.96
PG 16
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 442PK
UT WOS:000265852900004
PM 19384990
ER
PT J
AU Xu, JC
Crowley, MF
Smith, JC
AF Xu, Jiancong
Crowley, Michael F.
Smith, Jeremy C.
TI Building a foundation for structure-based cellulosome design for
cellulosic ethanol: Insight into cohesin-dockerin complexation from
computer simulation
SO PROTEIN SCIENCE
LA English
DT Article
DE cellulosic ethanol; cellulosome; cohesin-dockerin; principal component
analysis; free energy perturbation; adaptive biasing force; potential of
mean force
ID ALPHA-HELIX DIPOLE; MOLECULAR-DYNAMICS SIMULATIONS; FREE-ENERGY
CALCULATIONS; BINDING FREE-ENERGY; CLOSTRIDIUM-THERMOCELLUM;
CRYSTAL-STRUCTURE; COLLECTIVE MOTIONS; DOMAIN; PROTEIN; CELLULOLYTICUM
AB The organization and assembly of the cellulosome, an extracellular multienzyme complex produced by anaerobic bacteria, is mediated by the high-affinity interaction of cohesin domains from scaffolding proteins with dockerins of cellulosomal enzymes. We have performed molecular dynamics simulations and free energy calculations on both the wild type (WT) and D39N mutant of the C. thermocellum Type I cohesin-dockerin complex in aqueous solution. The D39N mutation has been experimentally demonstrated to disrupt cohesin-dockerin binding. The present MD simulations indicate that the substitution triggers significant protein flexibility and causes a major change of the hydrogen-bonding network in the recognition strips-the conserved loop regions previously proposed to be involved in binding-through electrostatic and salt-bridge interactions between beta-strands 3 and 5 of the cohesin and alpha-helix 3 of the dockerin. The mutation-induced subtle disturbance in the local hydrogen-bond network is accompanied by conformational rearrangements of the protein side chains and bound water molecules. Additional free energy perturbation calculations of the D39N mutation provide differences in the cohesin-dockerin binding energy, thus offering a direct, quantitative comparison with experiments. The underlying molecular mechanism of cohesin-dockerin complexation is further investigated through the free energy profile, that is, potential of mean force (PMF) calculations of WT cohesin-dockerin complex. The PMF shows a high-free energy barrier against the dissociation and reveals a stepwise pattern involving both the central beta-sheet interface and its adjacent solvent-exposed loop/turn regions clustered at both ends of the beta-barrel structure.
C1 [Xu, Jiancong; Smith, Jeremy C.] Oak Ridge Natl Lab, Ctr Biophys Mol, Oak Ridge, TN 37830 USA.
[Xu, Jiancong; Crowley, Michael F.; Smith, Jeremy C.] Oak Ridge Natl Lab, BioEnergy Sci Ctr, Oak Ridge, TN 37830 USA.
[Crowley, Michael F.] Natl Renewable Energy Lab, Chem & Biosci Ctr, Golden, CO 80401 USA.
RP Xu, JC (reprint author), Oak Ridge Natl Lab, Ctr Biophys Mol, Bldg 6011,MS6309,1 Bethel Valley Rd, Oak Ridge, TN 37830 USA.
EM xuj1@ornl.gov
RI smith, jeremy/B-7287-2012; crowley, michael/A-4852-2013
OI smith, jeremy/0000-0002-2978-3227; crowley, michael/0000-0001-5163-9398
NR 48
TC 11
Z9 11
U1 1
U2 15
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0961-8368
J9 PROTEIN SCI
JI Protein Sci.
PD MAY
PY 2009
VL 18
IS 5
BP 949
EP 959
DI 10.1002/pro.105
PG 11
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 442PK
UT WOS:000265852900008
PM 19384997
ER
PT J
AU Afshar, S
Sawaya, MR
Morrison, SL
AF Afshar, Sepideh
Sawaya, Michael R.
Morrison, Sherie L.
TI Structure of a mutant human purine nucleoside phosphorylase with the
prodrug, 2-fluoro-2 '-deoxyadenosine and the cytotoxic drug,
2-fluoroadenine
SO PROTEIN SCIENCE
LA English
DT Article
DE purine nucleoside phosphorylase; X-Ray structure; enzyme substrate
specificity; S(N)1 mechanism; cancer therapy; immunogenicity; prodrug;
cytotoxic drug
ID CATALYTIC MECHANISM; SPECIFICITY; REFINEMENT; SOFTWARE; MODELS
AB A double mutant of human purine nucleoside phosphorylase (hDM) with the amino acid mutations Glu201Gln: Asn243Asp cleaves adenosine-based prodrugs to their corresponding cytotoxic drugs. When fused to an anti-tumor targeting component, hDM is targeted to tumor cells, where it effectively catalyzes phosphorolysis of the prodrug, 2-fluoro-20-deoxyadenosine (F-dAdo) to the cytotoxic drug, 2-fluoroadenine (F-Ade). This cytotoxicity should be restricted only to the tumor microenvironment, because the endogenously expressed wild type enzyme cannot use adenosine-based prodrugs as substrates. To gain insight into the interaction of hDM with F-dAdo, we have determined the crystal structures of hDM with F-dAdo and F-Ade. The structures reveal that despite the two mutations, the overall fold of hDM is nearly identical to the wild type enzyme. Importantly, the residues Gln201 and Asp243 introduced by the mutation form hydrogen bond contacts with F-dAdo that result in its binding and catalysis. Comparison of substrate and product complexes suggest that the side chains of Gln201 and Asp243 as well as the purine base rotate during catalysis possibly facilitating cleavage of the glycosidic bond. The two structures suggest why hDM, unlike the wild-type enzyme, can utilize F-dAdo as substrate. More importantly, they provide a critical foundation for further optimization of cleavage of adenosine-based prodrugs, such as F-dAdo by mutants of human purine nucleoside phosphorylase.
C1 [Afshar, Sepideh; Morrison, Sherie L.] Univ Calif Los Angeles, UCLA DOE Inst Genom & Prote, Dept Microbiol Mol Genet & Immunol, Los Angeles, CA 90095 USA.
[Sawaya, Michael R.] Univ Calif Los Angeles, UCLA DOE Inst Genom & Prote, Howard Hughes Med Inst, Los Angeles, CA 90095 USA.
RP Afshar, S (reprint author), Univ Calif Los Angeles, UCLA DOE Inst Genom & Prote, Dept Microbiol Mol Genet & Immunol, MIMG 615 Charles E Young E 247 BSRB, Los Angeles, CA 90095 USA.
EM sepideha@ucla.edu
OI Sawaya, Michael/0000-0003-0874-9043
FU National Center for Research Resources at the National Institutes of
Health [RR-15301]
FX The authors thank Duilio Cascio for technical advice and UCLA-DOE
Technology Center for use of its crystallization and X-ray diffraction
facilities. This work is based upon research conducted at the
Northeastern Collaborative Access Team beamlines of the Advanced Photon
Source, which is supported by award RR-15301 from the National Center
for Research Resources at the National Institutes of Health.
NR 20
TC 8
Z9 8
U1 0
U2 2
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0961-8368
J9 PROTEIN SCI
JI Protein Sci.
PD MAY
PY 2009
VL 18
IS 5
BP 1107
EP 1114
DI 10.1002/pro.91
PG 8
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 442PK
UT WOS:000265852900023
PM 19388075
ER
PT J
AU Whitford, PC
Noel, JK
Gosavi, S
Schug, A
Sanbonmatsu, KY
Onuchic, JN
AF Whitford, Paul C.
Noel, Jeffrey K.
Gosavi, Shachi
Schug, Alexander
Sanbonmatsu, Kevin Y.
Onuchic, Jose N.
TI An all-atom structure-based potential for proteins: Bridging minimal
models with all-atom empirical forcefields
SO PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS
LA English
DT Article
DE energy landscape theory; protein folding; structure-based model;
all-atom model; side chain packing
ID FREE-ENERGY LANDSCAPE; MOLECULAR-DYNAMICS SIMULATIONS; SIDE-CHAIN
PACKING; FOLDING FUNNELS; CONFORMATIONAL TRANSITIONS; TRP-CAGE;
TOPOLOGICAL FRUSTRATION; FUNCTIONAL TRANSITIONS; ADENYLATE KINASE;
FRAGMENT-B
AB Protein dynamics take place on many time and length scales. Coarse-grained structure-based (G (o) over bar) models utilize the funneled energy landscape theory of protein folding to provide an understanding of both long time and long length scale dynamics. All-atom empirical forcefields with explicit solvent can elucidate our understanding of short time dynamics with high energetic and structural resolution. Thus, structure-based models with atomic details included can be used to bridge our understanding between these two approaches. We report on the robustness of folding mechanisms in one such all-atom model. Results for the B domain of Protein A, the SH3 domain of C-Src Kinase, and Chymotrypsin Inhibitor 2 are reported. The interplay between side chain packing and backbone folding is explored. We also compare this model to a C. structure-based model and an all-atom empirical forcefield. Key findings include: (1) backbone collapse is accompanied by partial side chain packing in a cooperative transition and residual side chain packing occurs gradually with decreasing temperature, (2) folding mechanisms are robust to variations of the energetic parameters, (3) protein folding free-energy barriers can be manipulated through parametric modifications, (4) the global folding mechanisms in a C. model and the all-atom model agree, although differences can be attributed to energetic heterogeneity in the all-atom model, and (5) proline residues have significant effects on folding mechanisms, independent of isomerization effects. Because this structure-based model has atomic resolution, this work lays the foundation for future studies to probe the contributions of specific energetic factors on protein folding and function.
C1 [Whitford, Paul C.; Noel, Jeffrey K.; Gosavi, Shachi; Schug, Alexander; Onuchic, Jose N.] Univ Calif San Diego, Ctr Theoret Biol Phys, La Jolla, CA 92093 USA.
[Whitford, Paul C.; Noel, Jeffrey K.; Gosavi, Shachi; Schug, Alexander; Onuchic, Jose N.] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
[Sanbonmatsu, Kevin Y.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Onuchic, JN (reprint author), Univ Calif San Diego, Ctr Theoret Biol Phys, 9500 Gilman Dr, La Jolla, CA 92093 USA.
EM jonuchic@ctbp.ucsd.edu
FU NIGMS NIH HHS [R01-GM072686, R01 GM072686, R01 GM072686-06, T32
GM008326, T32 GM008326-16, T32 GM008326-19, T32GM08326]
NR 76
TC 149
Z9 150
U1 4
U2 35
PU WILEY-LISS
PI HOBOKEN
PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0887-3585
J9 PROTEINS
JI Proteins
PD MAY 1
PY 2009
VL 75
IS 2
BP 430
EP 441
DI 10.1002/prot.22253
PG 12
WC Biochemistry & Molecular Biology; Biophysics
SC Biochemistry & Molecular Biology; Biophysics
GA 418SP
UT WOS:000264169400015
PM 18837035
ER
PT J
AU Boulet, SL
Grosse, SD
Honein, MA
Correa-Villasenor, A
AF Boulet, Sheree L.
Grosse, Scott D.
Honein, Margaret A.
Correa-Villasenor, Adolfo
TI Children with Orofacial Clefts: Health-Care Use and Costs Among a
Privately Insured Population
SO PUBLIC HEALTH REPORTS
LA English
DT Article
ID BIRTH-DEFECTS; UNITED-STATES; PALATE; LIP; CLASSIFICATION; EXPENDITURES;
INFANTS
AB Objectives. Orofacial clefts are common birth defects that often require multiple surgeries and medical treatments during childhood. We used health-care insurance claims data to estimate health-care expenditures for infants and children <= 10 years of age with an orofacial cleft.
Methods. The data were derived from the 2000-2004 MarketScan (R) Commercial Claims and Encounters databases, which include person-specific information on health-care use, expenditures, and enrollment for approximately 50 large employers, health plans, and government and public organizations. Health insurance claims data from 821,619 children <= 10 years of age enrolled in employer-sponsored plans during 2004 were analyzed. Expenditures for inpatient admissions, outpatient services, and prescription drug claims were calculated for children with and those without an orofacial cleft.
Results. The difference in annual mean costs (i.e., incremental costs) between children aged 0 through 10 years with an orofacial cleft and those without an orofacial cleft was $13,405. The mean and median costs for children <= 10 years of age with an orofacial cleft were eight times higher than for children of the same age without an orofacial cleft. Mean costs for infants with a cleft and another major, unrelated defect were 25 times higher than those for an infant without a cleft, and five times higher than for infants with an isolated cleft.
Conclusion. These findings document substantially elevated medical care costs for privately insured children with an orofacial cleft. Additional study of the economic burden associated with this condition should include a broader range of economic costs.
C1 [Boulet, Sheree L.; Grosse, Scott D.; Honein, Margaret A.; Correa-Villasenor, Adolfo] Ctr Dis Control & Prevent, Natl Ctr Birth Defects & Dev Disabil, Atlanta, GA 30333 USA.
[Boulet, Sheree L.] Oak Ridge Inst Sci & Educ, Oak Ridge, TN USA.
RP Boulet, SL (reprint author), Ctr Dis Control & Prevent, Natl Ctr Birth Defects & Dev Disabil, 1600 Clifton Rd,MS-E86, Atlanta, GA 30333 USA.
EM sboulet@cdc.gov
FU National Center on Birth Defects and Developmental Disabilities; Centers
for Disease Control and Prevention (CDC); U.S. Department of Energy and
CDC
FX This research was supported in part by an appointment to the Research
Participation Program at the National Center on Birth Defects and
Developmental Disabilities, Centers for Disease Control and Prevention
(CDC), administered by the Oak Ridge Institute for Science and Education
through an interagency agreement between the U.S. Department of Energy
and CDC.
NR 23
TC 38
Z9 38
U1 0
U2 1
PU ASSOC SCHOOLS PUBLIC HEALTH
PI WASHINGTON
PA 1101 15TH ST NW, STE 910, WASHINGTON, DC 20005 USA
SN 0033-3549
J9 PUBLIC HEALTH REP
JI Public Health Rep.
PD MAY-JUN
PY 2009
VL 124
IS 3
BP 447
EP 453
PG 7
WC Public, Environmental & Occupational Health
SC Public, Environmental & Occupational Health
GA 428OD
UT WOS:000264857000015
PM 19445422
ER
PT J
AU Engel, S
Lease, HM
McDowell, NG
Corbett, AH
Wolf, BO
AF Engel, Sophia
Lease, Hilary M.
McDowell, Nate G.
Corbett, Alyssa H.
Wolf, Blair O.
TI The use of tunable diode laser absorption spectroscopy for rapid
measurements of the delta C-13 of animal breath for physiological and
ecological studies
SO RAPID COMMUNICATIONS IN MASS SPECTROMETRY
LA English
DT Article
ID CARBON-ISOTOPE RATIOS; METABOLIC SUBSTRATE USE; LEAF-RESPIRED CO2;
EXHALED CO2; DIET; FRACTIONATION; HUMMINGBIRDS; ECOSYSTEM; TURNOVER;
FLUXES
AB In this study we introduce the use of tunable diode laser absorption spectroscopy (TDLAS) as a technique for making measurements of the delta C-13 of animal 'breath' in near real time. The carbon isotope ratios (delta C-13) of breath CO2 trace the carbon source of the materials being metabolized, which can provide insight into the use of specific food resources, e.g. those derived from plants using C-3 versus C-4 or CAM photosynthetic pathways. For physiological studies, labeled substrates and breath analyses provide direct evidence of specific physiological (e.g. fermentative digestion) or enzymatic (e.g. sucrase activity) processes. Although potentially very informative, this approach has rarely been taken in animal physiological or ecological research. In this study we quantify the utilization of different plant resources (photosynthetic types - C-3 or C-4) in arthropod herbivores by measuring the delta C-13 of their 'breath' and comparing it with bulk tissue values. We show that breath delta C-13 values are highly correlated with bulk tissues and for insect herbivores reflect their dietary guild, in our case C-3-specialists, C-4-specialists, or generalists. TDLAS has a number of advantages that will make it an important tool for physiologists, ecologists and behaviorists: it is non-invasive, fast, very sensitive, accurate, works on animals of a wide range of body sizes, per-sample costs are small, and it is potentially field-deployable. Copyright (C) 2009 John Wiley & Sons, Ltd.
C1 [Engel, Sophia; Lease, Hilary M.; Wolf, Blair O.] Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA.
[McDowell, Nate G.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Corbett, Alyssa H.] Tufts Univ, Dept Biol, Medford, MA 02155 USA.
RP Engel, S (reprint author), Univ New Mexico, Dept Biol, MSC03 2020, Albuquerque, NM 87131 USA.
EM sengel@unm.edu; wolf@unm.edu
FU National Science Foundation [DEB-0213659]; Max Planck Institute for
Ornithology, Germany [DEB-0620482]
FX We thank Karen Brown, Chris Bickford, Heath Powers and Clif Meyer for
technical assistance with TDLAS, and Viorel Atudorei for analyzing the
tissue samples. Dave Lightfoot helped us identify the grasshopper
species. Dave Hanson helped us improve an earlier version of this
manuscript. This paper is based on work supported by the National
Science Foundation under Grant No. DEB-0213659 to B. O. Wolf, a REU
supplement to Grant No. DEB-0620482 to the Sevilleta LTER, a fellowship
from the Max Planck Institute for Ornithology, Germany, to S. Engel, a
Laboratory Directed Research and Development grant to N.G. McDowell, and
an Institute of Geophysics and Planetary Physics grant to N. G.
McDowell.
NR 23
TC 15
Z9 15
U1 2
U2 14
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0951-4198
J9 RAPID COMMUN MASS SP
JI Rapid Commun. Mass Spectrom.
PD MAY
PY 2009
VL 23
IS 9
BP 1281
EP 1286
DI 10.1002/rcm.4004
PG 6
WC Biochemical Research Methods; Chemistry, Analytical; Spectroscopy
SC Biochemistry & Molecular Biology; Chemistry; Spectroscopy
GA 438FW
UT WOS:000265542300009
PM 19306281
ER
PT J
AU Van Berkel, GJ
Kertesz, V
AF Van Berkel, Gary J.
Kertesz, Vilmos
TI Electrochemically initiated tagging of thiols using an electrospray
ionization based liquid microjunction surface sampling probe
two-electrode cell
SO RAPID COMMUNICATIONS IN MASS SPECTROMETRY
LA English
DT Article
ID MASS-SPECTROMETRY SYSTEM; THIN TISSUE-SECTIONS; PROTEIN-ANALYSIS;
CYSTEINE RESIDUES; ION-SOURCE; NANOSPRAY; DEVICE; TAGS; MS
AB This paper reports on the conversion of a liquid microjunction surface sampling probe (LMJ-SSP) into a two-electrode electrochemical cell using a conductive sample surface and the probe as the two electrodes with an appropriate battery powered circuit. With this LMJ-SSP, two-electrode cell arrangement, tagging of analyte thiol functionalities (in this case peptide cysteine residues) with hydroquinone tags was initiated electrochemically using a hydroquinone-doped solution when the analyte either was initially in solution or was sampled from a surface. Efficient tagging (similar to 90%), at flow rates of 5-10 mu L/min, could be achieved for up to at least two cysteines on a peptide. The high tagging efficiency observed was explained with a simple kinetic model. In general, the incorporation of a two-electrode electrochemical cell, or other multiple electrode arrangement, into the LMJ-SSP is expected to add to the versatility of this approach for surface sampling and ionization coupled with mass spectrometric detection. Published in 2009 by John Wiley & Sons, Ltd.
C1 [Van Berkel, Gary J.; Kertesz, Vilmos] Oak Ridge Natl Lab, Div Chem Sci, Organ & Biol Mass Spectrometry Grp, Oak Ridge, TN 37831 USA.
RP Van Berkel, GJ (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Organ & Biol Mass Spectrometry Grp, Oak Ridge, TN 37831 USA.
EM vanberkelgj@ornl.gov
RI Kertesz, Vilmos/M-8357-2016
OI Kertesz, Vilmos/0000-0003-0186-5797
FU Cooperative Research and Development Agreement (CRADA) [ORNL02-0662];
Division of Chemical Sciences, Geosciences, and Biosciences; United
States Department of Energy [DE-AC05-00OIZ22725]; U.S. Government
[DE-AC05-00OR22725]
FX The Microionspray II used to fabricate the LMJ-SSP was provided through
a Cooperative Research and Development Agreement (CRADA) with MDS Sciex
(ORNL02-0662). This research was supported by the Division of Chemical
Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences,
United States Department of Energy under Contract DE-AC05-00OIZ22725
with ORNL, managed and operated by UT-Battelle, LLC. This manuscript has
been authored by a contractor of the U.S. Government under contract No.
DE-AC05-00OR22725. Accordingly, the U. S. Government retains a paid-up,
nonexclusive, irrevocable, worldwide license to publish or reproduce the
published form of this contribution, prepare derivative works,
distribute copies to the public, and perform publicly and display
publicly, or allow others to do so, for U.S. Government purposes.
NR 29
TC 19
Z9 19
U1 0
U2 9
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 0951-4198
J9 RAPID COMMUN MASS SP
JI Rapid Commun. Mass Spectrom.
PD MAY
PY 2009
VL 23
IS 9
BP 1380
EP 1386
DI 10.1002/rcm.4014
PG 7
WC Chemistry, Analytical; Spectroscopy
SC Chemistry; Spectroscopy
GA 438FW
UT WOS:000265542300020
PM 19337980
ER
PT J
AU Atwood, CL
Kelly, DL
AF Atwood, Corwin L.
Kelly, Dana L.
TI The binomial failure rate common-cause model with WinBUGS
SO RELIABILITY ENGINEERING & SYSTEM SAFETY
LA English
DT Article
DE BFR; Bayesian estimation; Failure on demand; Standby failures; Staggered
testing
AB The binomial failure rate (BFR) common-cause model was introduced in the 1970s, but has not been used much recently. it turns out to be very easy to use with WinBUGS, a free, widely used Markov chain Monte Carlo (MCMC) program for Bayesian estimation. This fact recommends it in situations when failure data are available, especially when few failures have been observed. This article explains how to use it both for standby equipment that may fail to operate when demanded and for running equipment that may fail at random times. Example analyses are given and discussed. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Atwood, Corwin L.] Statwood Consulting, Silver Spring, MD 20910 USA.
[Kelly, Dana L.] Idaho Natl Lab, Idaho Falls, ID USA.
RP Atwood, CL (reprint author), Statwood Consulting, 2905 Covington Rd, Silver Spring, MD 20910 USA.
EM cory@statwoodconsulting.com; Dana.Kelly@inl.gov
NR 10
TC 3
Z9 3
U1 4
U2 10
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0951-8320
J9 RELIAB ENG SYST SAFE
JI Reliab. Eng. Syst. Saf.
PD MAY
PY 2009
VL 94
IS 5
BP 990
EP 999
DI 10.1016/j.ress.2008.11.007
PG 10
WC Engineering, Industrial; Operations Research & Management Science
SC Engineering; Operations Research & Management Science
GA 424CE
UT WOS:000264542300012
ER
PT J
AU Yefremenko, V
Gordiyenko, E
Shustakova, G
Fomenko, Y
Datesman, A
Wang, G
Pearson, J
Cohen, EEW
Novosad, V
AF Yefremenko, V.
Gordiyenko, E.
Shustakova, G.
Fomenko, Yu.
Datesman, A.
Wang, G.
Pearson, J.
Cohen, E. E. W.
Novosad, V.
TI A broadband imaging system for research applications
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
DE cadmium compounds; II-VI semiconductors; infrared detectors; infrared
imaging; mercury compounds; mirrors; photodetectors
AB We have developed a compact, computer-piloted, high sensitivity broadband imaging system for laboratory research that is compatible with various detectors. Mirror optics allow application from the visible to the far infrared spectral range. A prototype tested in conjunction with a mercury cadmium telluride detector exhibits a peak detectivity of 6.7x10(10) cm Hz(1/2)/W at a wavelength of 11.8 mu m. Temperature and spatial resolutions of 0.06 K and 1.6 mrad, respectively, were demonstrated.
C1 [Yefremenko, V.; Datesman, A.; Wang, G.; Pearson, J.; Novosad, V.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Gordiyenko, E.; Shustakova, G.; Fomenko, Yu.] B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine.
[Shustakova, G.; Cohen, E. E. W.] Univ Chicago, Dept Med, Chicago, IL 60637 USA.
RP Novosad, V (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM novosad@anl.gov
RI Novosad, Valentyn/C-2018-2014; Novosad, V /J-4843-2015
FU Office of Science and Office of Basic Energy Sciences of the U.S.
Department of Energy [DE-AC02-06CH11357]; NIH "Functional Infrared
Imaging Predicts Radiation Mucositis" [1R21CA125000-01A1]
FX The work at Argonne National Laboratory was supported by Office of
Science and Office of Basic Energy Sciences of the U.S. Department of
Energy, under Contract No. DE-AC02-06CH11357. Partial funding was
provided by NIH "Functional Infrared Imaging Predicts Radiation
Mucositis," Grant No. 1R21CA125000-01A1.
NR 8
TC 2
Z9 2
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0034-6748
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD MAY
PY 2009
VL 80
IS 5
AR 056104
DI 10.1063/1.3124796
PG 3
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 451AG
UT WOS:000266442500057
PM 19485541
ER
PT J
AU Botello-Zubiate, ME
Santillan, C
Ayala-Valenzuela, OE
Matute-Aquino, JA
Jaime, M
AF Botello-Zubiate, M. E.
Santillan, C.
Ayala-Valenzuela, O. E.
Matute-Aquino, J. A.
Jaime, M.
TI Comparative study of ferromagnetic superconductors
(Ru1-xNbxSr2Eu1.4Ce0.6Cu2O10) by different preparation methods
SO REVISTA MEXICANA DE FISICA
LA English
DT Article; Proceedings Paper
CT 17th International Materials Research Congress
CY AUG 17-21, 2008
CL Cancun, MEXICO
SP Mexican Mat Res Soc, Natl Assoc Corros Engn
DE Ferromagnetic superconductors; resistance; critical magnetic field
ID RUSR2EU1.5CE0.5CU2O10-DELTA
AB Polycrystalline ferromagnetic superconducting samples of rutheno-cuprates with chemical formula Ru1-xNbxSr2Eu1.4Ce0.6Cu2O10-delta (x = 0, 0.2, 0.4, 0.6, 0.8 and 1) were prepared by two different routes. An almost pure Ru-1222 type phase with a small amount of the Ru-2116 or Ru-1212 phases in some of the samples were determined. Randomly oriented particles in laminates form with a length and width of a few micrometers together with agglomerates were observed. Particle size distributions, average particle sizes porosity and final density depends on the processing route. Critical magnetic fields, intra- and inter-grain transition temperatures are functions of sample composition and processing route.
C1 [Botello-Zubiate, M. E.; Santillan, C.; Ayala-Valenzuela, O. E.; Matute-Aquino, J. A.] Complejo Ind Chihuahua, Ctr Invest Mat Avanzados SC, Chihuahua 31109, Mexico.
[Jaime, M.] Los Alamos Natl Lab, Natl High Magnet Field Lab MS E536, Los Alamos, NM 87545 USA.
RP Botello-Zubiate, ME (reprint author), Complejo Ind Chihuahua, Ctr Invest Mat Avanzados SC, Miguel Cervantes 120, Chihuahua 31109, Mexico.
RI Jaime, Marcelo/F-3791-2015
OI Jaime, Marcelo/0000-0001-5360-5220
NR 6
TC 1
Z9 1
U1 0
U2 0
PU SOC MEXICANA FISICA
PI COYOACAN
PA APARTADO POSTAL 70-348, COYOACAN 04511, MEXICO
SN 0035-001X
J9 REV MEX FIS
JI Rev. Mex. Fis.
PD MAY
PY 2009
VL 55
IS 1
SU S
BP 118
EP 122
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 449JI
UT WOS:000266326400029
ER
PT J
AU Hunt, B
Pratt, E
Gadagkar, V
Yamashita, M
Balatsky, AV
Davis, JC
AF Hunt, B.
Pratt, E.
Gadagkar, V.
Yamashita, M.
Balatsky, A. V.
Davis, J. C.
TI Evidence for a Superglass State in Solid He-4
SO SCIENCE
LA English
DT Article
ID BOSE-EINSTEIN CONDENSATION; SUPERSOLIDITY; SUPERFLUID; CRYSTALS; HELIUM
AB Although solid helium-4 (He-4) may be a supersolid, it also exhibits many phenomena unexpected in that context. We studied relaxation dynamics in the resonance frequency f(T) and dissipation D(T) of a torsional oscillator containing solid He-4. With the appearance of the "supersolid" state, the relaxation times within f(T) and D(T) began to increase rapidly together. More importantly, the relaxation processes in both D(T) and a component of f(T) exhibited a complex synchronized ultraslow evolution toward equilibrium. Analysis using a generalized rotational susceptibility revealed that, while exhibiting these apparently glassy dynamics, the phenomena were quantitatively inconsistent with a simple excitation freeze-out transition because the variation in f was far too large. One possibility is that amorphous solid He-4 represents a new form of supersolid in which dynamical excitations within the solid control the superfluid phase stiffness.
C1 [Hunt, B.; Pratt, E.; Gadagkar, V.; Yamashita, M.; Davis, J. C.] Cornell Univ, Dept Phys, Atom & Solid State Phys Lab, Ithaca, NY 14853 USA.
[Yamashita, M.] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan.
[Balatsky, A. V.] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Div T, Los Alamos, NM 87545 USA.
[Davis, J. C.] Univ St Andrews, Scottish Univ Phys Alliance, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland.
RP Davis, JC (reprint author), Cornell Univ, Dept Phys, Atom & Solid State Phys Lab, Ithaca, NY 14853 USA.
EM jcdavis@ccmr.cornell.edu
RI YAMASHITA, MINORU/D-6556-2011; Pratt, Ethan/E-8714-2011; Hunt,
Benjamin/C-3395-2017
OI Hunt, Benjamin/0000-0002-5008-8042
FU NSF [DM-0434801, DMR-0806629]; Cornell University; Natural Sciences and
Engineering Research Council of Canada; Japan Society for the Promotion
of Science; U.S. Department of Energy
FX We acknowledge and thank J. Beamish, M. W. H. Chan, A. Clark, A. Dorsey,
M. Graf, E. Mueller, S. Nagel, M. Paalanen, R. E. Packard, J. Parpia, J.
D. Reppy, A. S. Rittner, J. Saunders, J. P. Sethna, and Wm. Vinen for
helpful discussions and communications. These studies were initiated
under NSF grant DM-0434801 and are now partially supported under grant
DMR-0806629 and by Cornell University; B.H. acknowledges support by the
Natural Sciences and Engineering Research Council of Canada. M.Y.
acknowledges support from the Japan Society for the Promotion of
Science. Work at Los Alamos was supported by the U.S. Department of
Energy.
NR 32
TC 105
Z9 105
U1 1
U2 9
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
J9 SCIENCE
JI Science
PD MAY 1
PY 2009
VL 324
IS 5927
BP 632
EP 636
DI 10.1126/science.1169512
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 439DW
UT WOS:000265608800041
PM 19407201
ER
PT J
AU Shukla, AK
Baeslack, WA
AF Shukla, A. K.
Baeslack, W. A., III
TI Study of process/structure/property relationships in friction stir
welded thin sheet Al-Cu-Li alloy
SO SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
LA English
DT Article
DE Friction stir welding; Al-Cu-Mg; Microstructure; TEM; Thin sheet
ID FOIL THICKNESS; MICROSTRUCTURE; EVOLUTION; ALUMINUM; TEM
AB Microstructure evolution in friction stir welds produced in artificially aged Al-4Cu-1Li-0.36Mg-0.14Zr-0.28Ag alloy over a range of process parameters was studied using transmission electron microscopy. Process parameters did not have a major effect on the weld microstructure and mechanical properties. The stir zone exhibited an appreciable decrease in hardness relative to the unaffected base metal due to dissolution of T(1) and theta' precipitates. The heat affected zone exhibited almost complete dissolution of theta' precipitates and partial dissolution of T(1) precipitates. The effect of process conditions on T(1) precipitate density in the heat affected zone was studied and it was found that dissolution was experienced at lower tool rotation speed to traverse rate ratios, while welds produced at higher tool rotation speed to traverse rate ratios experienced both dissolution and growth of T(1) precipitates. The results obtained on this thin sheet aluminium alloy were compared to those of friction stir welds produced in thicker sections of the same alloy.
C1 [Shukla, A. K.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Baeslack, W. A., III] Case Western Reserve Univ, Cleveland, OH 44106 USA.
RP Shukla, AK (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM akshukla@lbl.gov
NR 22
TC 12
Z9 14
U1 4
U2 12
PU MANEY PUBLISHING
PI LEEDS
PA STE 1C, JOSEPHS WELL, HANOVER WALK, LEEDS LS3 1AB, W YORKS, ENGLAND
SN 1362-1718
J9 SCI TECHNOL WELD JOI
JI Sci. Technol. Weld. Join.
PD MAY
PY 2009
VL 14
IS 4
BP 376
EP 387
DI 10.1179/136217109X412409
PG 12
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 461HT
UT WOS:000267256200014
ER
PT J
AU Cosovic, V
Talijan, N
Grujic, A
Stajic-Trosic, J
Zak, T
Lee, Z
Radmilovic, V
AF Cosovic, V.
Talijan, N.
Grujic, A.
Stajic-Trosic, J.
Zak, T.
Lee, Z.
Radmilovic, V.
TI Study of Nd-Fe-B Alloys with Nonstoichiometric Nd Content in Optimal
Magnetic State
SO SCIENCE OF SINTERING
LA English
DT Article
DE Rapid quenched Nd-Fe-B alloys; Nonstoichiometric Nd content; Phase
composition; Grain size; Magnetic properties
ID PHASE-COMPOSITION
AB Characterization of two rapid-quenched Nd-Fe-B alloys with nonstoichiometric Nd content in the optimized magnetic state was carried out using the X-ray diffractometry (XRD), Fe-57 Mossbauer spectroscopic phase analysis (MS), electron microscopy (TEM), high resolution TEM (HREM) and Superconducting Quantum Interference Device (SQUID) magnetometer. The experimental results demonstrate the fundamental difference in the structure and magnetic properties of the two investigated alloys in the optimized magnetic state. The Nd-Fe-B alloy with the reduced Nd content (Nd4.5Fe77B18.5) was found to have the nanocomposite structure of Fe3B/Nd2Fe14B and partly alpha-Fe/Nd2Fe14B, with mean grain size below 30 nm. On the other side, the overstoichiometric Nd14Fe79B7 alloy has almost a monophase structure with the dominant content of the hard magnetic phase Nd2Fe14B (up to 95 wt. %) and a mean crystallite size about 60 nm, as determined by XRD and TEM analysis. The results of magnetic measurements on SQUID magnetometer also suggest the nanocomposite structure of the Nd-low alloy and nanocrystalline decoupled structure of the Nd-rich alloy after the optimal heat treatment.
C1 [Cosovic, V.; Talijan, N.; Grujic, A.; Stajic-Trosic, J.] Inst Chem Technol & Met, Belgrade 11000, Serbia.
[Zak, T.] Inst Phys Mat AS CR, Brno, Czech Republic.
[Lee, Z.; Radmilovic, V.] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
RP Talijan, N (reprint author), Inst Chem Technol & Met, Njegoseva 12, Belgrade 11000, Serbia.
EM ntalijan@tmf.bg.ac.rs
RI Lee, Zonghoon/G-1474-2011; Zak, Tomas/G-1454-2014
OI Lee, Zonghoon/0000-0003-3246-4072;
FU Ministry of Science of the Republic of Serbia [OI 142035B]; National
Center for Electron Microscopy, Lawrence Berkeley Lab; U.S. Department
of Energy [DE-AC02-05CH11231]
FX The presented work has been supported by the Ministry of Science of the
Republic of Serbia under Project OI 142035B. The authors acknowledge
support of the National Center for Electron Microscopy, Lawrence
Berkeley Lab, which is supported by the U.S. Department of Energy under
Contract # DE-AC02-05CH11231.
NR 17
TC 0
Z9 0
U1 0
U2 5
PU INT INST SCIENCE SINTERING (I I S S)
PI BELGRADE
PA C/O ITN SANU, KNEZ MIHAILOVA 35/IV, PO BOX 315, 11000 BELGRADE,
YUGOSLAVIA
SN 0350-820X
J9 SCI SINTER
JI Sci. Sinter.
PD MAY-AUG
PY 2009
VL 41
IS 2
BP 211
EP 220
DI 10.2298/SOS0902209C
PG 10
WC Materials Science, Ceramics; Metallurgy & Metallurgical Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 517DA
UT WOS:000271592200012
ER
PT J
AU Dougherty, LM
Gray, GT
Cerreta, EK
McCabe, RJ
Field, RD
Bingert, JF
AF Dougherty, L. M.
Gray, G. T., III
Cerreta, E. K.
McCabe, R. J.
Field, R. D.
Bingert, J. F.
TI Rare twin linked to high-pressure phase transition in iron
SO SCRIPTA MATERIALIA
LA English
DT Article
DE Ferritic steels; Electron backscattering diffraction (EBSD);
Transmission electron microscopy (TEM); Martensitic phase
transformation; Dynamic phenomena
ID X-RAY-DIFFRACTION; INNER-CORE; SHOCK; DEFORMATION; TRANSFORMATIONS;
ALLOYS
AB At approximately 13 GPa, body-centered cubic alpha-iron undergoes a fully reversible, pressure-induced phase transition into hexagonal close-packed epsilon-iron. Microstructural evidence of this phase transition has been identified in the fully reverted alpha-iron as a large number of {332}< 113 > twins found primarily as secondary twins within {112}< 111 > primary twins. The {332}< 113 > twins were produced during high-pressure shock-loading of 1018 steel at a peak pressure above the alpha-epsilon phase transition pressure. The twins were identified using electron backscattered diffraction and transmission electron microscopy. Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
C1 [Dougherty, L. M.; Gray, G. T., III; Cerreta, E. K.; McCabe, R. J.; Field, R. D.; Bingert, J. F.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Dougherty, LM (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM lmdough@lanl.gov
OI McCabe, Rodney /0000-0002-6684-7410
FU United States Department of Energy; Department of Defense (DoD) Joint
Munitions Technology Development Program
FX This work was funded by the United States Department of Energy and
Department of Defense (DoD) Joint Munitions Technology Development
Program. The authors thank C.P. Trujillo and P.A. Papin for their
assistance with the experiments in this research.
NR 22
TC 8
Z9 10
U1 1
U2 19
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6462
J9 SCRIPTA MATER
JI Scr. Mater.
PD MAY
PY 2009
VL 60
IS 9
BP 772
EP 775
DI 10.1016/j.scriptamat.2009.01.014
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 426TF
UT WOS:000264730000010
ER
PT J
AU Won, J
Valdez, JA
Naito, M
Ishimaru, M
Sickafus, KE
AF Won, Jonghan
Valdez, James A.
Naito, Muneyuki
Ishimaru, Manabu
Sickafus, Kurt E.
TI Transmission electron microscopy study of an electron-beam-induced phase
transformation of niobium nitride
SO SCRIPTA MATERIALIA
LA English
DT Article
DE Niobium nitride; Phase transformation; Electron irradiation;
Transmission electron microscopy; Order-disorder
ID ION IRRADIATION; CRYSTAL-STRUCTURE; RADIATION-DAMAGE; CERAMICS;
DISORDER; DY2O3
AB Tetragonal gamma-NbN(1-x) was irradiated with 300 keV electrons at room temperature to fluences from 1.8 x 10(24)-5.4 x 10(26) e/m(2). The superlattice structure in gamma-NbN(1-x) was observed using transmission electron microscopy and found to disappear at a fluence of 5.4 x 10(26) e/m(2). During this process, displaced nitrogen atoms occupy vacant sites on the nitrogen sublattice. The final structure is a delta-phase (B1) structure. A randomized arrangement of N vacancies is responsible for the observed gamma -> delta transformation. Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
C1 [Won, Jonghan; Valdez, James A.; Sickafus, Kurt E.] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
[Naito, Muneyuki; Ishimaru, Manabu] Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan.
RP Won, J (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
EM jhwon@lanl.gov
OI won, Jonghan/0000-0002-7612-1322
FU U.S. Department of Energy (DOE), Office of Basic Sciences, Division of
Materials Sciences and Engineering
FX This research was supported by the U.S. Department of Energy (DOE),
Office of Basic Sciences, Division of Materials Sciences and
Engineering.
NR 33
TC 2
Z9 2
U1 0
U2 5
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6462
J9 SCRIPTA MATER
JI Scr. Mater.
PD MAY
PY 2009
VL 60
IS 9
BP 799
EP 802
DI 10.1016/j.scriptamat.2009.01.023
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 426TF
UT WOS:000264730000017
ER
PT J
AU Hulbert, DM
Anders, A
Andersson, J
Lavernia, EJ
Mukherjee, AK
AF Hulbert, Dustin M.
Anders, Andre
Andersson, Joakim
Lavernia, Enrique J.
Mukherjee, Amiya K.
TI A discussion on the absence of plasma in spark plasma sintering
SO SCRIPTA MATERIALIA
LA English
DT Article
DE Spark plasma sintering; Theory; Nanocrystalline materials; Ceramics;
Metal and alloys
ID ARC CATHODE SPOTS; SINTERING/SYNTHESIS PROCESS; FUNDAMENTAL
INVESTIGATIONS; RANDOM-WALK; VACUUM; NOISE; CONSOLIDATION; GROWTH; FIELD
AB Spark plasma sintering (SPS) is a remarkable method for synthesizing and consolidating a large variety of both novel and traditional materials. A number of mechanisms have been proposed to account for the enhanced sintering abilities of the SPS process. Of these mechanisms, one commonly put forth, and the one that draws the most controversy, involves the presence of momentary plasma generated between particles. This experimental study and subsequent discussion advocates the absence of plasma during SPS. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Hulbert, Dustin M.; Lavernia, Enrique J.; Mukherjee, Amiya K.] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
[Anders, Andre; Andersson, Joakim] Univ Calif Berkeley, Lawrence Berkeley Lab, Plasma Applicat Grp, Berkeley, CA 94720 USA.
RP Mukherjee, AK (reprint author), Univ Calif Davis, Dept Chem Engn & Mat Sci, 1 Shields Ave, Davis, CA 95616 USA.
EM akmukherjee@ucdavis.edu
RI Andersson, Joakim/A-3017-2009; Lavernia, Enrique/I-6472-2013; Anders,
Andre/B-8580-2009
OI Andersson, Joakim/0000-0003-2991-1927; Lavernia,
Enrique/0000-0003-2124-8964; Anders, Andre/0000-0002-5313-6505
FU Office of Naval Research [N0001403-1-0148, N00014-07-1-0745,
N00014-08-10405]; Army Research Office [W911NF-04-1-0348]; US Department
of Energy [DE-AC02-05CH1123]
FX This work was supported by the Office of Naval Research under Dr. Larry
Kabacoff (Grants # N0001403-1-0148, # N00014-07-1-0745 and #
N00014-08-10405) and the Army Research Office under Dr. Sheldon Cytron
(Grant # W911NF-04-1-0348). The authors thank Phil Landenla from Ocean
Optics for experimental assistance. The work by the Berkeley Lab
employees was supported by the US Department of Energy (Contract #
DE-AC02-05CH1123
NR 18
TC 88
Z9 91
U1 0
U2 35
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6462
J9 SCRIPTA MATER
JI Scr. Mater.
PD MAY
PY 2009
VL 60
IS 10
BP 835
EP 838
DI 10.1016/j.scriptamat.2008.12.059
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 432YN
UT WOS:000265170400001
ER
PT J
AU Desai, TG
Uberuaga, BP
AF Desai, Tapan G.
Uberuaga, Blas P.
TI Stress-induced phase transformation in nanocrystalline UO2
SO SCRIPTA MATERIALIA
LA English
DT Article
DE Heterogeneous nucleation of phase transformations; Nanocrystalline
microstructure; Simulation; Fluorite
ID MOLECULAR-DYNAMICS SIMULATION; AUGMENTED-WAVE METHOD; NUCLEATION;
TRANSITION
AB We report a stress-induced phase transformation in stoichiometric UO2 from fluorite to alpha-PbO2 structure using molecular dynamics (MD) simulations and density functional theory (DFT) calculations. MD simulations, performed on nanocrystalline microstructure under constant-stress tensile loading conditions, reveal a heterogeneous nucleation of alpha-PbO2 phase at the grain boundaries followed by the growth of this phase towards the interior of the grain. The DFT calculations confirm the existence of the alpha-PbO2 structure, showing that it is energetically favored under tensile loading conditions. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Desai, Tapan G.] Idaho Natl Lab, Dept Mat Sci & Engn, Idaho Falls, ID 83415 USA.
[Uberuaga, Blas P.] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
RP Desai, TG (reprint author), Idaho Natl Lab, Dept Mat Sci & Engn, Idaho Falls, ID 83415 USA.
EM tapan.desai@inl.gov
FU US Department of Energy (DOE) Idaho Operations Office [DE-AC07-051D14
517V]; DOE/BES; DOE, Global Nuclear Energy Partnership; Office of Basic
Energy Sciences; US DOE [DE-AC52-06NA25396]
FX T.G.D. was sponsored through the INL Laboratory Directed Research and
Development program under the US Department of Energy (DOE) Idaho
Operations Office Contract No. DE-AC07-051D14 517V, as well as the
DOE/BES funded Computational Materials Science Network (CMSN) project on
"Multiscale simulation of thermo-mechanical processes irradiated
fission-reactor materials". B.P.U. acknowledges support from the DOE,
Global Nuclear Energy Partnership and the Office of Basic Energy
Sciences. Los Alamos National Laboratory is operated by Los Alamos
National Security, LLC, for the National Nuclear Security Administration
of the US DOE under Contract DE-AC52-06NA25396. We are also grateful for
discussions with Dieter Wolf (INL), Paul Millett (INL), Richard Hoagland
(LANL) and Kurt Sickafus (LANL).
NR 25
TC 14
Z9 14
U1 0
U2 14
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6462
J9 SCRIPTA MATER
JI Scr. Mater.
PD MAY
PY 2009
VL 60
IS 10
BP 878
EP 881
DI 10.1016/j.scriptamat.2009.01.041
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 432YN
UT WOS:000265170400012
ER
PT J
AU Qu, J
Blau, PJ
Howe, JY
Meyer, HM
AF Qu, Jun
Blau, Peter J.
Howe, Jane Y.
Meyer, Harry M., III
TI Oxygen diffusion enables anti-wear boundary film formation on titanium
surfaces in zinc-dialkyl-dithiophosphate (ZDDP)-containing lubricants
SO SCRIPTA MATERIALIA
LA English
DT Article
DE Titanium alloys; Wear; Oxygen diffusion; ZDDP; Boundary film
ID IRON-OXIDE; FRICTION; ALLOYS; WEAR; TRIBOFILM; ZDDP
AB This paper reports a wear reduction by up to six orders of magnitude for Ti-6Al-4V alloy when treated by an oxygen diffusion (OD) process and subsequently tested in a zinc-dialkyl-dithiophosphate (ZDDP)-containing lubricant. In addition to case hardening, it is discovered that OD enables the formation of an anti-wear boundary film on the titanium surface. Transmission electron microscopy and surface chemical analyses revealed that this boundary film has a two-layer structure comprising an amorphous oxide interlayer and a ZDDP-based top film with complex compounds. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Qu, Jun; Blau, Peter J.; Howe, Jane Y.; Meyer, Harry M., III] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Qu, J (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, 1 Bethel Valley Rd,POB 2008,MS-6063, Oak Ridge, TN 37831 USA.
EM qujn@ornl.gov
RI Howe, Jane/G-2890-2011;
OI Qu, Jun/0000-0001-9466-3179
FU Heavy Vehicle Propulsion Materials Program; High Temperature Materials
Laboratory User Program; DOE/EERE Office of Vehicle Technologies
[DE-AC05-00OR22725]; UT-Battelle, LLC; SHaRE User Facility; Division of
Scientific User Facilities, DOE Office of Basic Energy Sciences
FX The authors thank L.R. Walker and Dr. H. Xu from ORNL for microprobe
elemental mapping and hardness measurements, respectively. Research was
sponsored by the Heavy Vehicle Propulsion Materials Program and the High
Temperature Materials Laboratory User Program, DOE/EERE Office of
Vehicle Technologies, under Contract DE-AC05-00OR22725 with UT-Battelle,
LLC. A portion of this research was supported by the SHaRE User
Facility, which is sponsored by the Division of Scientific User
Facilities, DOE Office of Basic Energy Sciences.
NR 17
TC 16
Z9 17
U1 4
U2 12
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6462
J9 SCRIPTA MATER
JI Scr. Mater.
PD MAY
PY 2009
VL 60
IS 10
BP 886
EP 889
DI 10.1016/j.scriptamat.2009.02.009
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 432YN
UT WOS:000265170400014
ER
PT J
AU Clarke, AJ
Field, RD
Dickerson, PO
McCabe, RJ
Swadener, JG
Hackenberg, RE
Thoma, DJ
AF Clarke, A. J.
Field, R. D.
Dickerson, P. O.
McCabe, R. J.
Swadener, J. G.
Hackenberg, R. E.
Thoma, D. J.
TI A microcompression study of shape-memory deformation in U-13 at.% Nb
SO SCRIPTA MATERIALIA
LA English
DT Article
DE Shape memory alloys (SMAs); Microcompression testing; Electron
backscattering diffraction (EBSD); Transmission electron microscopy
(TEM)
ID ALLOYS; PLASTICITY; URANIUM
AB Microcompression specimens, 10-15 mu m in diameter by 20-30 mu m in height, were produced from individual parent grains in a polycrystalline U-13 at.%Nb shape-memory alloy using the focused ion beam technique. The specimens were tested in a nanoindentation instrument with a flat diamond tip to investigate stress-strain behavior as a function of crystallographic orientation. The results are in qualitative agreement with a single-crystal accommodation strain (Bain strain) model of the shape-memory effect for this alloy. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Clarke, A. J.; Field, R. D.; Dickerson, P. O.; McCabe, R. J.; Swadener, J. G.; Hackenberg, R. E.; Thoma, D. J.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Field, RD (reprint author), Los Alamos Natl Lab, Mail Stop G 770, Los Alamos, NM 87545 USA.
EM rdfield@lanl.gov
OI Hackenberg, Robert/0000-0002-0380-5723; McCabe, Rodney
/0000-0002-6684-7410; Swadener, John G/0000-0001-5493-3461
FU US Department of Energy [DE-AC52-06NA25396]
FX The authors wish to thank Ann Marie Kelly for assistance with
metallographic preparation of the specimens, Pallas Papin for electron
microprobe analysis and Martin Koby for the ICP-MS analysis. Larry Hults
and Tim Tucker are also acknowledged for their assistance with heat
treatments of the specimens. This work was performed under contract
number DE-AC52-06NA25396 with the US Department of Energy.
NR 15
TC 9
Z9 10
U1 1
U2 17
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6462
J9 SCRIPTA MATER
JI Scr. Mater.
PD MAY
PY 2009
VL 60
IS 10
BP 890
EP 892
DI 10.1016/j.scriptamat.2009.02.003
PG 3
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 432YN
UT WOS:000265170400015
ER
PT J
AU Chilton, L
Walsh, S
AF Chilton, Lawrence
Walsh, Stephen
TI Detection of Gaseous Plumes using Basis Vectors
SO SENSORS
LA English
DT Review
DE Plumes; detection; LWIR; basis vectors; generalized least squares
ID HYPERSPECTRAL IMAGERY
AB Detecting and identifying weak gaseous plumes using thermal imaging data is complicated by many factors. There are several methods currently being used to detect plumes. They can be grouped into two categories: those that use a chemical spectral library and those that don't. The approaches that use chemical libraries include physics-based least squares methods (matched filter). They are "optimal" only if the plume chemical is actually in the search library but risk missing chemicals not in the library. The methods that don't use a chemical spectral library are based on a statistical or data analytical transformation applied to the data. These include principle components, independent components, entropy, Fourier transform, and others. These methods do not explicitly take advantage of the physics of the signal formulation process and therefore don't exploit all available information in the data. This paper describes generalized least squares detection using gas spectra, presents a new detection method using basis vectors, and compares detection images resulting from applying both methods to synthetic hyperspectral data.
C1 [Chilton, Lawrence; Walsh, Stephen] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Chilton, L (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA.
EM lawrence.chilton@pnl.gov; stephen.walsh@pnl.gov
OI Walsh, Stephen/0000-0002-0505-648X
FU US Department of Energy [DAC05-76RL01830]
FX This work was supported by the United States National Nuclear Security
Administration's Office of Nonproliferation Research and Development and
conducted at the US Department of Energy's Pacific Northwest National
Laboratory. The laboratory is operated by Battelle Memorial Institute
for the US Department of Energy under Contract DAC05-76RL01830.
NR 13
TC 2
Z9 2
U1 1
U2 2
PU MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL-MDPI
PI BASEL
PA KANDERERSTRASSE 25, CH-4057 BASEL, SWITZERLAND
SN 1424-8220
J9 SENSORS-BASEL
JI Sensors
PD MAY
PY 2009
VL 9
IS 5
BP 3205
EP 3217
DI 10.3390/s90503205
PG 13
WC Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation
SC Chemistry; Electrochemistry; Instruments & Instrumentation
GA 450DL
UT WOS:000266381100003
PM 22412306
ER
PT J
AU McFarlane, KJ
Schoenholtz, SH
Powers, RF
AF McFarlane, Karis J.
Schoenholtz, Stephen H.
Powers, Robert F.
TI Plantation Management Intensity Affects Belowground Carbon and Nitrogen
Storage in Northern California
SO SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
LA English
DT Article
ID LOBLOLLY-PINE PLANTATION; DOUGLAS-FIR STANDS; REPEATED UREA
FERTILIZATION; ORGANIC-MATTER FRACTIONS; FINE-ROOT DYNAMICS; SOIL
CARBON; PONDEROSA PINE; FOREST-SOIL; NUTRIENT AVAILABILITY; LITTER
DECOMPOSITION
AB Belowground C and N storage is important in maintaining forest productivity and to CO(2) sequestration. How these pools respond to management is poorly understood. We investigated effects of repeated applications of complete fertilizer and competing vegetation control with herbicides on C and N storage in forest-floor, fine-root, and mineral-soil C and N pools to 1-m depth at three Pinus ponderosa P Lawson & C. Lawson var. ponderosa plantations across a site quality gradient in northern California. Belowground C pools without treatment were 66, 153, and 199 Mg C ha(-1) for the low-, intermediate-, and high-quality sites, respectively, and N pools were 5.1, 6.7, and 6.5 Mg N ha(-1), respectively. Treatments increased tree-bole volume at 20 yr as much as 400%, while changes in C and N pools belowground were less dramatic. Herbicide treatment increased forest-floor C pools 35% at the poorer quality site. Fertilization increased forest-floor C and N storage 46 to 106% at all sites. Fertilization decreased fine-root C pools at 0 to 0.3 m at the most productive site 43% and increased this N pool 43% at the least productive site, but did not influence fine-root pools to 1 m. Fertilization increased mineral-soil C pools on lower quality sites, resulting in 12 to 57% more belowground C storage. At the intermediate site, fertilization increased total belowground N storage 12%. Results of this study suggest that the major sequestration mechanism up to this point in stand development is through gains in tree biomass rather than storage in fine roots and soil belowground.
C1 [McFarlane, Karis J.] Oregon State Univ, Dep Forest Eng Resources & Management, Corvallis, OR 97330 USA.
[Schoenholtz, Stephen H.] Virginia Polytech Inst & State Univ, Virginia Water Resources Res Ctr, Blacksburg, VA 24061 USA.
[Powers, Robert F.] US Forest Serv, USDA, Pacific SW Res Stn, Redding, CA 96002 USA.
RP McFarlane, KJ (reprint author), Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, POB 808,L-397, Livermore, CA 94551 USA.
EM mcfarlane3@llnl.gov
OI McFarlane, Karis/0000-0001-6390-7863
FU U.S. Department of Energy by University of California, Lawrence
Livermore National Laboratory [W-7405-Eng-48]
FX We thank Dave Young and Bert Spear for their assistance in the field.
Chris Gerig and Erin Heim also helped with fieldwork and processed
samples. David Myrold, Steve Perakis, and Glen Murphy edited early
versions of this manuscript, and Alan Stangenberger supplied trs with
unpublished, archived soil bulk density data from the University of
California, Berkeley. Three anonymous reviewers provided comments and
suggestions that greatly improved this manuscript. 'l'his study was
supported by the National Fire Plan, the Sierra-Cascade Intensive Forest
Management Research Cooperative, and Sierra Pacific Industries. This
work was performed under the auspices of the U.S. Department of Energy
by University of California, Lawrence Livermore National Laboratory
under Contract W-7405-Eng-48. The use of trade, firm, or corporation
names in this publication is for the convenience of the reader. Such use
does not constitute an official endorsement or approval by the U.S.
Government of any product or service to the exclusion of others that may
be suitable.
NR 79
TC 15
Z9 15
U1 0
U2 10
PU SOIL SCI SOC AMER
PI MADISON
PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA
SN 0361-5995
J9 SOIL SCI SOC AM J
JI Soil Sci. Soc. Am. J.
PD MAY-JUN
PY 2009
VL 73
IS 3
BP 1020
EP 1032
DI 10.2136/sssaj2008.0158
PG 13
WC Soil Science
SC Agriculture
GA 439IX
UT WOS:000265621900036
ER
PT J
AU Ahrenkiel, RK
Johnston, SW
AF Ahrenkiel, R. K.
Johnston, S. W.
TI An optical technique for measuring surface recombination velocity
SO SOLAR ENERGY MATERIALS AND SOLAR CELLS
LA English
DT Article
DE Silicon photovoltaics; Recombination velocity; Carrier lifetime;
Characterization
ID SEMI-INFINITE SEMICONDUCTOR; CARRIER LIFETIME; BULK LIFETIME
AB The surface recombination velocity is a critical parameter in silicon device applications including solar cells. In this work, we developed and applied a contactless optical/radio-frequency technique to provide quick, contactless measurement of the Surface recombination velocity. The basic technique is to probe the excess carrier lifetime in the surface and bulk regions of a semiconductor wafer by varying the excitation wavelength. Here. we have derived a theoretical functional model that describes the experimental photoconductive transient. A curve fitting procedure provides a determination for both the bulk recombination lifetime and the surface recombination velocity. Published by Elsevier B.V.
C1 [Ahrenkiel, R. K.] Colorado Sch Mines Met & Mat Engn, Golden, CO 80401 USA.
[Ahrenkiel, R. K.; Johnston, S. W.] Natl Renewable Energy Lab, Golden, CO USA.
RP Ahrenkiel, RK (reprint author), Colorado Sch Mines Met & Mat Engn, 1500 Illinois St,Hill Hall,Room 309, Golden, CO 80401 USA.
EM richard_ahrenkiel@nrel.gov
FU US DOE [DE-AC36-99-G010337]
FX This work was supported by US DOE Contract no. DE-AC36-99-G010337.
NR 12
TC 19
Z9 19
U1 0
U2 14
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0927-0248
J9 SOL ENERG MAT SOL C
JI Sol. Energy Mater. Sol. Cells
PD MAY
PY 2009
VL 93
IS 5
BP 645
EP 649
DI 10.1016/j.solmat.2008.12.028
PG 5
WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied
SC Energy & Fuels; Materials Science; Physics
GA 436DF
UT WOS:000265392100018
ER
PT J
AU Lavraud, B
Gosling, JT
Rouillard, AP
Fedorov, A
Opitz, A
Sauvaud, JA
Foullon, C
Dandouras, I
Genot, V
Jacquey, C
Louarn, P
Mazelle, C
Penou, E
Phan, TD
Larson, DE
Luhmann, JG
Schroeder, P
Skoug, RM
Steinberg, JT
Russell, CT
AF Lavraud, B.
Gosling, J. T.
Rouillard, A. P.
Fedorov, A.
Opitz, A.
Sauvaud, J. -A.
Foullon, C.
Dandouras, I.
Genot, V.
Jacquey, C.
Louarn, P.
Mazelle, C.
Penou, E.
Phan, T. D.
Larson, D. E.
Luhmann, J. G.
Schroeder, P.
Skoug, R. M.
Steinberg, J. T.
Russell, C. T.
TI Observation of a Complex Solar Wind Reconnection Exhaust from Spacecraft
Separated by over 1800 R-E
SO SOLAR PHYSICS
LA English
DT Article
DE Magnetic reconnection; Solar wind; Suprathermal electrons; Strahl; Halo;
Heliospheric current sheet; Magnetic topology
ID INTERPLANETARY MAGNETIC-FIELD; DAYSIDE MAGNETOPAUSE; EARTHS
MAGNETOPAUSE; CURRENT SHEET; PITCH-ANGLE; ELECTRON; EVENTS; PLASMA;
SIGNATURES; TOPOLOGY
AB We analyze Wind, ACE, and STEREO (ST-A and ST-B) plasma and magnetic field data in the vicinity of the heliospheric current sheet (HCS) crossed by all spacecraft between 22:15 UT on 31 March and 01:25 UT on 1 April 2007 corresponding to its observation at ST-A and ST-B, which were separated by over 1800 R (E) (or over 1200 R (E) across the Sun -aEuro parts per thousand Earth line). Although only Wind and ACE provided good ion flow data in accord with a solar wind magnetic reconnection exhaust at the HCS, the magnetic field bifurcation typical of such exhausts was clearly observed at all spacecraft. They also all observed unambiguous strahl mixing within the exhaust, consistent with the sunward flow deflection observed at Wind and ACE and thus with the formation of closed magnetic field lines within the exhaust with both ends attached to the Sun. The strong dawnward flow deflection in the exhaust is consistent with the exhaust and X-line orientations obtained from minimum variance analysis at each spacecraft so that the X-line is almost along the GSE Z-axis and duskward of all the spacecraft. The observation of strahl mixing in extended and intermittent layers outside the exhaust by ST-A and ST-B is consistent with the formation of electron separatrix layers surrounding the exhaust. This event also provides further evidence that balanced parallel and antiparallel suprathermal electron fluxes are not a necessary condition for identification of closed field lines in the solar wind. In the present case the origin of the imbalance simply is the mixing of strahls of substantially different strengths from a different solar source each side of the HCS. The inferred exhaust orientations and distances of each spacecraft relative to the X-line show that the exhaust was likely nonplanar, following the Parker spiral orientation. Finally, the separatrix layers and exhausts properties at each spacecraft suggest that the magnetic reconnection X-line location and/or reconnection rate were variable in both space and time at such large scales.
C1 [Lavraud, B.; Fedorov, A.; Opitz, A.; Sauvaud, J. -A.; Dandouras, I.; Genot, V.; Jacquey, C.; Louarn, P.; Mazelle, C.; Penou, E.] Univ Toulouse UPS, Ctr Etud Spatiale Rayonnements, F-31028 Toulouse 4, France.
[Lavraud, B.; Fedorov, A.; Opitz, A.; Sauvaud, J. -A.; Dandouras, I.; Genot, V.; Jacquey, C.; Louarn, P.; Mazelle, C.; Penou, E.] CNRS, UMR 5187, Toulouse, France.
[Gosling, J. T.] Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309 USA.
[Rouillard, A. P.] Univ Southampton, Sch Phys & Astron, Space Environm Phys Grp, Southampton, Hants, England.
[Foullon, C.] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England.
[Phan, T. D.; Larson, D. E.; Luhmann, J. G.; Schroeder, P.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Skoug, R. M.; Steinberg, J. T.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Russell, C. T.] Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90024 USA.
RP Lavraud, B (reprint author), Univ Toulouse UPS, Ctr Etud Spatiale Rayonnements, 9 Ave Colonel Roche, F-31028 Toulouse 4, France.
EM Benoit.Lavraud@cesr.fr
RI Foullon, Claire/A-3539-2009; Russell, Christopher/E-7745-2012
OI Dandouras, Iannis/0000-0002-7121-1118; Foullon,
Claire/0000-0002-2532-9684; Russell, Christopher/0000-0003-1639-8298
FU UK Science and Technology Facilities Council (STFC)
FX The authors are grateful to the STEREO, ACE, and Wind instrument teams
and the CDAWeb for providing part of the data. C. F. acknowledges
financial support from the UK Science and Technology Facilities Council
(STFC) on the MSSL Rolling Grant.
NR 40
TC 19
Z9 20
U1 0
U2 3
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0038-0938
J9 SOL PHYS
JI Sol. Phys.
PD MAY
PY 2009
VL 256
IS 1-2
BP 379
EP 392
DI 10.1007/s11207-009-9341-x
PG 14
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 438OC
UT WOS:000265563900022
ER
PT J
AU Pierrard, V
Goldstein, J
Andre, N
Jordanova, VK
Kotova, GA
Lemaire, JF
Liemohn, MW
Matsui, H
AF Pierrard, Viviane
Goldstein, Jerry
Andre, Nicolas
Jordanova, Vania K.
Kotova, Galina A.
Lemaire, Joseph F.
Liemohn, Mike W.
Matsui, Hiroshi
TI Recent Progress in Physics-Based Models of the Plasmasphere
SO SPACE SCIENCE REVIEWS
LA English
DT Review
DE Plasmasphere; Models; Fluid; Kinetic; CLUSTER; IMAGE
ID WAVE-PARTICLE INTERACTIONS; MAGNETOSPHERIC ELECTRIC-FIELDS; LIGHT-ION
TROUGH; ASYMMETRIC RING CURRENT; COLD DENSE-PLASMA; H+ POLAR WIND;
MAGNETIC-FIELD; OUTER MAGNETOSPHERE; TRANSPORT-EQUATIONS; LATITUDE
IONOSPHERE
AB We describe recent progress in physics-based models of the plasmasphere using the fluid and the kinetic approaches. Global modeling of the dynamics and influence of the plasmasphere is presented. Results from global plasmasphere simulations are used to understand and quantify (i) the electric potential pattern and evolution during geomagnetic storms, and (ii) the influence of the plasmasphere on the excitation of electromagnetic ion cyclotron (EMIC) waves and precipitation of energetic ions in the inner magnetosphere. The interactions of the plasmasphere with the ionosphere and the other regions of the magnetosphere are pointed out. We show the results of simulations for the formation of the plasmapause and discuss the influence of plasmaspheric wind and of ultra low frequency (ULF) waves for transport of plasmaspheric material. Theoretical models used to describe the electric field and plasma distribution in the plasmasphere are presented. Model predictions are compared to recent Cluster and Image observations, but also to results of earlier models and satellite observations.
C1 [Pierrard, Viviane; Lemaire, Joseph F.] Belgian Inst Space Aeron IASB BIRA, B-1180 Brussels, Belgium.
[Pierrard, Viviane; Lemaire, Joseph F.] CSR, Louvain, Belgium.
[Goldstein, Jerry] SW Res Inst, Space Sci & Engn Div, San Antonio, TX USA.
[Andre, Nicolas] ESTEC ESA, RSSD, Noordwijk, Netherlands.
[Jordanova, Vania K.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Kotova, Galina A.] Russian Acad Sci, Space Res Inst RSSI, Moscow, Russia.
[Liemohn, Mike W.] Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA.
[Matsui, Hiroshi] Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA.
RP Pierrard, V (reprint author), Belgian Inst Space Aeron IASB BIRA, 3 Ave Circulaire, B-1180 Brussels, Belgium.
EM viviane.pierrard@oma.be; jgoldstein@swri.edu; nandre@rssd.esa.int;
vania@lanl.gov; kotova@iki.rssi.ru; lemaire@astr.ucl.ac.be;
liemohn@umich.edu; hiroshi.matsui@unh.edu
RI Liemohn, Michael/H-8703-2012;
OI Liemohn, Michael/0000-0002-7039-2631; Pierrard,
Viviane/0000-0001-5014-7682; Jordanova, Vania/0000-0003-0475-8743
NR 190
TC 22
Z9 22
U1 0
U2 4
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0038-6308
J9 SPACE SCI REV
JI Space Sci. Rev.
PD MAY
PY 2009
VL 145
IS 1-2
BP 193
EP 229
DI 10.1007/s11214-008-9480-7
PG 37
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 457FT
UT WOS:000266914600007
ER
PT J
AU Williams, PT
AF Williams, Paul T.
TI Reduction in Incident Stroke Risk With Vigorous Physical Activity
Evidence From 7.7-Year Follow-Up of the National Runners' Health Study
SO STROKE
LA English
DT Article
DE physical activity; prevention; cerebrovascular disease
ID ASSOCIATION; EXERCISE
AB Background and Purpose-The purpose of this study was to assess the dose-response relationship between vigorous physical activity (running distance, km/d) and the participant-reported physician-diagnosed stroke.
Methods-Age-adjusted survival analysis of 29 279 men and 12 123 women followed prospectively for 7.7 years.
Results-One hundred men and 19 women reported incident strokes. Per km/d run, the age-and smoking-adjusted risk for stroke decreased 12% in men (P=0.0007), and 11% in men and women combined (P=0.001), which remained significant when further adjusted for baseline diabetes, hypercholesterolemia, hypertension, and BMI (8% and 7% reduction per km/d run, respectively, P=0.03). Men and women who ran >= 2 km/d (ie, exceeded the recommended AHA/CDC and NIH guideline activity level) had significantly lower risk than those who ran less (P=0.05), and those who ran >= 4 km/d had significantly lower risk than those who ran 2 to 3.9 km/d (P=0.02). Men and women who ran >= 8 km/d were at 60% lower risk than those who ran >= 2 km/d (P=0.002).
Conclusions-The risk for incident stroke is substantially reduced in those who exceed the guideline physical activity level, which cannot be attributed to less hypertension, diabetes, hypercholesterolemia, or body weight. (Stroke. 2009; 40: 1921-1923.)
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Donner Lab, Div Life Sci, Berkeley, CA 94720 USA.
RP Williams, PT (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Donner Lab, Div Life Sci, Berkeley, CA 94720 USA.
EM ptwilliams@lbl.gov
FU Institute of Aging [AG032004]; Institute of Diabetes and Digestive and
Kidney Diseases of the National Institutes of Health [DK-066738]; Ernest
Orlando Lawrence Berkeley National Laboratory [DE-AC03-76SF00098]
FX This research was supported in part by grants AG032004 from the
Institute of Aging, and DK-066738 from the Institute of Diabetes and
Digestive and Kidney Diseases of the National Institutes of Health and
was conducted at the Ernest Orlando Lawrence Berkeley National
Laboratory (Department of Energy DE-AC03-76SF00098 to the University of
California).
NR 6
TC 26
Z9 27
U1 0
U2 4
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0039-2499
J9 STROKE
JI Stroke
PD MAY
PY 2009
VL 40
IS 5
BP 1921
EP 1923
DI 10.1161/STROKEAHA.108.535427
PG 3
WC Clinical Neurology; Peripheral Vascular Disease
SC Neurosciences & Neurology; Cardiovascular System & Cardiology
GA 438UB
UT WOS:000265579800063
PM 19299640
ER
PT J
AU Nguyen, DN
Grilli, F
Ashworth, SP
Willis, JO
AF Nguyen, Doan N.
Grilli, Francesco
Ashworth, Stephen P.
Willis, Jeffrey O.
TI AC loss study of antiparallel connected YBCO coated conductors
SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY
LA English
DT Article
ID FAULT CURRENT LIMITER; TRANSPORT CURRENT LOSSES; MAGNETIC-FIELDS; HTS
TAPES; SUPERCONDUCTORS; SUBSTRATE; COILS
AB Some applications of high temperature superconducting conductors require a non-inductive winding, which may be constructed from antiparallel connected YBCO (yttrium barium copper oxide) tapes. In the case of AC applications, this antiparallel winding changes the AC losses from that of an isolated conductor. This study focuses on the effect of the spatial separation and misalignment between conductors on their AC loss behavior for YBCO conductors on both rolling assisted biaxially textured substrate (RABiTS) and ion beam assisted deposition templates in an effort to fully understand the behavior of these conductors in real world applications. For RABiTS samples, the study was carried out for all three possible configurations (the so-called back-to-back, front-to-front and same-way configurations) to clarify the effect of the ferromagnetic substrate on the AC loss behavior in these conductor configurations. Numerical simulations were also employed in some cases to compare with and elucidate experimental observations.
C1 [Nguyen, Doan N.; Ashworth, Stephen P.; Willis, Jeffrey O.] Los Alamos Natl Lab, Superconduct Technol Ctr, Los Alamos, NM 87545 USA.
[Grilli, Francesco] Ecole Polytech, Montreal, PQ H3C 3A7, Canada.
[Grilli, Francesco] Forschungszentrum Karlsruhe, ITP, Karlsruhe, Germany.
RP Nguyen, DN (reprint author), Los Alamos Natl Lab, Superconduct Technol Ctr, POB 1663, Los Alamos, NM 87545 USA.
EM doan@lanl.gov
RI Nguyen, Doan/F-3148-2010
FU US Department of Energy (DoE); Mathematics of Information Technology and
Complex System (MITACS) network (Canada)
FX The authors wish to thank SuperPower and American Superconductor
Corporation for providing high-performance coated conductors for these
measurements. This work was supported mainly by the US Department of
Energy (DoE) and partially by Mathematics of Information Technology and
Complex System (MITACS) network (Canada).
NR 27
TC 29
Z9 29
U1 1
U2 11
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-2048
J9 SUPERCOND SCI TECH
JI Supercond. Sci. Technol.
PD MAY
PY 2009
VL 22
IS 5
AR 055014
DI 10.1088/0953-2048/22/5/055014
PG 9
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA 435NK
UT WOS:000265350400015
ER
PT J
AU Hamilton, JC
Wolfer, WG
AF Hamilton, J. C.
Wolfer, W. G.
TI Theories of surface elasticity for nanoscale objects
SO SURFACE SCIENCE
LA English
DT Article
DE Surface stress; Nanostructures; Surface elasticity; Semi-empirical
models; Model calculations
ID STRESS; RECONSTRUCTIONS; INTERFACE; CRYSTALS; METALS; STRAIN; FILMS;
MODEL
AB The emergence of nanotechnology has driven recent interest in systems having surface atoms as a significant fraction of all atoms present, in particular nano-sheets (ultra-thin slabs), nano-wires, and nano-particles. In these systems, the bulk (i.e. non-surface region or interior) is typically strained in response to the stress of the surface. This elastic strain of the bulk in turn changes the surface lattice constants. Since the bulk and the surface are coupled, the problem must be solved self-consistently. Solving this problem requires a quantitative model of the surface elastic properties which are different from the bulk. In this paper we consider various models that have been proposed for surface elasticity. Our goal is to elucidate the relationship between two contrasting approaches: (1) the Shuttleworth equation which defines a surface stress based on the strain derivative of the surface energy and (2) the Gurtin-Murdoch (GM) theory which considers the surface layer as a membrane with residual strain and with elastic constants different from the bulk. The GM theory is analogous to the 2-D Frenkel-Kontorova (FK) model and can be used to obtain quantitative parameters for the FK model. We present an embedded atom method calculation of the surface elastic constants of Cu(111) using the GM theory with the surface represented by a membrane one atomic layer thick. This quantitative approach describes the elastic properties of surfaces in a physically appealing way. just as the bulk elastic constants provide direct information regarding the stress/strain relationship in a bulk material, the surface elastic constants provide similar information for a surface monolayer. This theory will allow elasticity analysis and atomistic calculations of properties of nano-scale objects. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Hamilton, J. C.] Sandia Natl Labs, Livermore, CA 94550 USA.
[Wolfer, W. G.] Ktech Corp Inc, Albuquerque, NM 87185 USA.
RP Hamilton, JC (reprint author), Sandia Natl Labs, MS 9161, Livermore, CA 94550 USA.
EM jchamil@sandia.gov
FU US Department of Energy, Basic Energy Sciences, Division of Materials
Science [DE-AC04-94AL85000]
FX We wish to acknowledge helpful discussions with N.C. Bartelt and K.F.
McCarty. This work was supported by the US Department of Energy, Basic
Energy Sciences, Division of Materials Science, under Contract No.
DE-AC04-94AL85000.
NR 21
TC 13
Z9 14
U1 1
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-6028
J9 SURF SCI
JI Surf. Sci.
PD MAY 1
PY 2009
VL 603
IS 9
BP 1284
EP 1291
DI 10.1016/j.susc.2009.03.017
PG 8
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 453KZ
UT WOS:000266610700020
ER
PT J
AU Zhou, QL
Birkholzer, JT
Tsang, CF
AF Zhou, Quanlin
Birkholzer, Jens T.
Tsang, Chin-Fu
TI A Semi-Analytical Solution for Large-Scale Injection-Induced Pressure
Perturbation and Leakage in a Laterally Bounded Aquifer-Aquitard System
SO TRANSPORT IN POROUS MEDIA
LA English
DT Article
DE Analytical solution; Pressure perturbation; Leakage; Groundwater flow;
Pumping test
ID PUMPING-INDUCED LEAKAGE; NUMERICAL INVERSION; LAPLACE TRANSFORMS; WELL;
DISCHARGE; STORAGE; FLOW
AB A number of (semi-)analytical solutions are available to drawdown analysis and leakage estimation of shallow aquifer-aquitard systems. These solutions assume that the systems are laterally infinite. When a large-scale pumping from (or injection into) an aquifer-aquitard system of lower specific storativity occurs, induced pressure perturbation (or hydraulic head drawdown/rise) may reach the lateral boundary of the aquifer. We developed semi-analytical solutions to address the induced pressure perturbation and vertical leakage in a "laterally bounded" system consisting of an aquifer and an overlying/underlying aquitard. A one-dimensional radial flow equation for the aquifer was coupled with a one-dimensional vertical flow equation for the aquitard, with a no-flow condition imposed on the outer radial boundary. Analytical solutions were obtained for (1) the Laplace-transform hydraulic head drawdown/rise in the aquifer and in the aquitard, (2) the Laplace-transform rate and volume of leakage through the aquifer-aquitard interface integrated up to an arbitrary radial distance, (3) the transformed total leakage rate and volume for the entire interface, and (4) the transformed horizontal flux at any radius. The total leakage rate and volume depend only on the hydrogeologic properties and thicknesses of the aquifer and aquitard, as well as the duration of pumping or injection. It was proven that the total leakage rate and volume are independent of the aquifer's radial extent and wellbore radius. The derived analytical solutions for bounded systems are the generalized solutions of infinite systems. Laplace-transform solutions were numerically inverted to obtain the hydraulic head drawdown/rise, leakage rate, leakage volume, and horizontal flux for given hydrogeologic and geometric conditions of the aquifer-aquitard system, as well as injection/pumping scenarios. Application to a large-scale injection-and-storage problem in a bounded system was demonstrated.
C1 [Zhou, Quanlin; Birkholzer, Jens T.; Tsang, Chin-Fu] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Zhou, QL (reprint author), 1 Cyclotron Rd, Berkeley, MS USA.
EM qzhou@lbl.gov
RI Zhou, Quanlin/B-2455-2009; Birkholzer, Jens/C-6783-2011
OI Zhou, Quanlin/0000-0001-6780-7536; Birkholzer, Jens/0000-0002-7989-1912
FU Lawrence Berkeley National Laboratory (LBNL) [DE-AC02-05CH11231]
FX The authors wish to thank George Moridis at Lawrence Berkeley National
Laboratory (LBNL) for his careful internal review of the manuscript.
Thanks are also due to two anonymous reviewers for their constructive
suggestions for improving the quality of the manuscript. This work was
funded by the Assistant Secretary for Fossil Energy, Office of
Sequestration, Hydrogen, and Clean Coal Fuels, National Energy
Technology Laboratory, of the U. S. Department of Energy, and by
Lawrence Berkeley National Laboratory under Contract No.
DE-AC02-05CH11231.
NR 27
TC 25
Z9 25
U1 0
U2 12
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0169-3913
J9 TRANSPORT POROUS MED
JI Transp. Porous Media
PD MAY
PY 2009
VL 78
IS 1
BP 127
EP 148
DI 10.1007/s11242-008-9290-0
PG 22
WC Engineering, Chemical
SC Engineering
GA 430EZ
UT WOS:000264972900007
ER
PT J
AU Ahmed, A
Bahadur, S
Russell, AM
Cook, BA
AF Ahmed, A.
Bahadur, S.
Russell, A. M.
Cook, B. A.
TI Belt abrasion resistance and cutting tool studies on new ultra-hard
boride materials
SO TRIBOLOGY INTERNATIONAL
LA English
DT Article
DE Boride composites; Abrasive wear; Cutting tool wear
ID SILICON-NITRIDE; STRENGTH; CERAMICS
AB Composites of AlMgB(14) with 0, 30, and 70 wt% of TiB(2) were prepared by mechanical alloying and hot pressing. The composites' belt abrasion resistance and cutting tool performance were measured by gravimetric analysis of material removal at varying loads and cutting speeds. AlMgB(14)-70 wt% TiB(2) composites had high hardness and fracture toughness and the highest abrasive resistance of the three compositions. Cutting tool performance of AlMgB(14)-70 wt% TiB(2) showed low wear due to chipping and little reaction with the Ti-6Al-4V work-piece. Subsurface damage and adhesion of the work-piece onto the tool material were gauged by SEM. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Bahadur, S.] Iowa State Univ, Dept Mech Engn, Ames, IA 50011 USA.
[Ahmed, A.] Godrej Castlemaine, Symantec Inc, Pune 411001, Maharashtra, India.
[Russell, A. M.; Cook, B. A.] Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
[Russell, A. M.] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
RP Bahadur, S (reprint author), Iowa State Univ, Dept Mech Engn, 106 Nucl Engn Bldg, Ames, IA 50011 USA.
EM bahadur@iastate.edu
OI Russell, Alan/0000-0001-5264-0104
FU US National Science Foundation [CMS-0307094]; US Department of Energy
[W-7405-Eng-82]
FX The support for this work was provided by the US National Science
Foundation under Grant no. CMS-0307094. The material processing and SEM
studies were performed at Ames Laboratory under Contract no.,
W-7405-Eng-82 with the US Department of Energy. The authors thank Joel
Harringa for his guidance on material processing and analysis, Justin
Peters for his help with the preparation of specimens and SEM work, and
Paul Dreher of TIMET for supplying the Ti-6Al-4V turning work-piece.
NR 16
TC 11
Z9 15
U1 1
U2 9
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0301-679X
J9 TRIBOL INT
JI Tribol. Int.
PD MAY
PY 2009
VL 42
IS 5
BP 706
EP 713
DI 10.1016/j.triboint.2008.10.013
PG 8
WC Engineering, Mechanical
SC Engineering
GA 429FB
UT WOS:000264905200014
ER
PT J
AU Ramachandra, R
Griffin, B
Joy, D
AF Ramachandra, Ranjan
Griffin, Brendan
Joy, David
TI A model of secondary electron imaging in the helium ion scanning
microscope
SO ULTRAMICROSCOPY
LA English
DT Article
DE Secondary electrons; Helium ions; Scanning microscopy
ID AMORPHOUS TARGETS; SOLID-SURFACES; CLEAN METALS; EMISSION; BOMBARDMENT;
ANGLE; DEPENDENCE; PROJECTILE; YIELD
AB A combination of the 'semi-empirical' model for secondary electron production and the TRIM routines which describe ion stopping power, scattering, and transport, has been used to construct a Monte Carlo simulation (IONiSE) that can quantitatively interpret the generation of secondary electrons (SE) from materials by fast helium ions. This approach requires that the parameters of the semi-empirical model be determined by fitting to experimental yield data but has the merit that, unlike more fundamental models, it can be applied with equal ease to both pure elements and complex compounds. The application of the model to predict the topographic yield variation of helium generated SE as a function of energy and material, and to investigate the ratio between SE generated by incident and backscattered ions, is demonstrated. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Ramachandra, Ranjan; Joy, David] Univ Tennessee, Knoxville, TN 37996 USA.
[Griffin, Brendan] Univ Western Australia, Perth, WA 6009, Australia.
[Griffin, Brendan; Joy, David] Oak Ridge Natl Lab, Ctr NanoPhase Mat Sci, Oak Ridge, TN 37831 USA.
RP Joy, D (reprint author), Univ Tennessee, Knoxville, TN 37996 USA.
EM djoy@utk.edu
RI Griffin, Brendan/D-5686-2011
FU SRCIGRC [1778.001]
FX Portions of this work are based on the TRIM and SRIM codes and their
associated databases (www.srim.org). The authors are also grateful to
Clarke Fenner, John Notte, and Bill Thompson of Zeiss SIVIT for their
enthusiastic interest and assistance; and to Drs. John VillarrUbbia,
Andras Vlaclar, and Scott Wight (NIST); Professor David Bell (Harvard);
Dr. Joe Michael (Sandia National Laboratory); Dr. Lucille Giannuzzi
(FEI): and Dr. Harry M Meyer III (ORNL) for valuable discussions. This
work was partially supported by SRCIGRC under Project ' 1778.001,
Program Manager Dr. Dan Herr.
NR 37
TC 67
Z9 67
U1 2
U2 39
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3991
J9 ULTRAMICROSCOPY
JI Ultramicroscopy
PD MAY
PY 2009
VL 109
IS 6
BP 748
EP 757
DI 10.1016/j.ultramic.2009.01.013
PG 10
WC Microscopy
SC Microscopy
GA 442CC
UT WOS:000265816400007
PM 19269097
ER
PT J
AU Nellis, SR
Yoon, H
Werth, CJ
Oostrom, M
Valocchi, AJ
AF Nellis, Scott R.
Yoon, Hongkyu
Werth, Charles J.
Oostrom, Mart
Valocchi, Albert J.
TI Surface and Interfacial Properties of Nonaqueous-Phase Liquid Mixtures
Released to the Subsurface at the Hanford Site
SO VADOSE ZONE JOURNAL
LA English
DT Article
ID HETEROGENEOUS POROUS-MEDIA; ACID SOLUTION CHEMISTRY;
CARBON-TETRACHLORIDE; ORGANIC-ACID; TRANSPORT-PROPERTIES; TENSION;
WATER; FLOW; IMBIBITION; ALCOHOLS
AB Surface and interfacial tensions are key parameters affecting nonaqueous-phase liquid (NAPL) movement and redistribution in the subsurface after spill events. In this study, the impact of major additive components on surface and interfacial tensions for organic mixtures and wastewater was investigated. Organic mixture and wastewater compositions were based on CCl(4) mixtures released at the U. S. Department of Energy's Hanford site, where CCl(4) was discharged simultaneously with dibutyl butyl phosphonate, tributyl phosphate, dibutyl phosphate, and a machining lard oil. A considerable amount of wastewater consisting primarily of nitrates and metal salts was also discharged. The measured tension values revealed that the addition of these additive components caused a significant lowering of the interfacial tension with water or wastewater and the surface tension of the wastewater phase in equilibrium with the organic mixtures, compared with pure CCl(4), but had minimal effect on the surface tension of the NAPL itself. These results led to large differences in spreading coefficients for several mixtures, where the additives caused both a higher (more spreading) initial spreading coefficient and a lower (less spreading) equilibrium spreading coefficient. This indicates that if these mixtures migrate into uncontaminated areas, they will tend to spread quickly but will form a higher residual NAPL saturation on after equilibrium than pure CCl(4). Withtime, CCl(4) probably volatilizes more rapidly than other components in the originally disposed mixtures and the lard oil and phosphates would become more concentrated in the remaining NAPL, resulting in a lower interfacial tension for the mixture. These results show that the behavior of organic chemical mixtures should be accounted for in flow and transport models.
C1 [Nellis, Scott R.; Yoon, Hongkyu; Werth, Charles J.; Valocchi, Albert J.] Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA.
[Oostrom, Mart] Pacific NW Natl Lab, Energy & Environm Directorate, Hydrol Grp, Richland, WA 99354 USA.
RP Yoon, H (reprint author), Univ Illinois, Dept Civil & Environm Engn, 205 N Mathews Ave, Urbana, IL 61801 USA.
EM hyoon3@illinois.edu
FU U.S. Department of Energy (DOE) [DE-FG02-06ER64207, DE-AC06-76RLO 1830]
FX This work was primarily supported by the Office of Science (BER), U.S.
Department of Energy (DOE), Environmental Remediation Sciences Program,
Grant no. DE-FG02-06ER64207. Some of the experiments were performed with
support from the Environmental Molecular Sciences Laboratory (EMSL), a
national scientific user facility sponsored by the DOE's Office of
Biological and Environmental Research and located at the Pacific
Northwest National Laboratory (PNNL). The PNNL is operated by the
Battelle Memorial Institute for the DOE under Contract DE-AC06-76RLO
1830. Scientists interested in conducting experimental work in the EMSL
are encouraged to contact M. Oostrom (mart.oostrom@pnl.gov).
NR 52
TC 5
Z9 7
U1 1
U2 3
PU SOIL SCI SOC AMER
PI MADISON
PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA
SN 1539-1663
J9 VADOSE ZONE J
JI Vadose Zone J.
PD MAY
PY 2009
VL 8
IS 2
BP 343
EP 351
DI 10.2136/vzj2008.0104
PG 9
WC Environmental Sciences; Soil Science; Water Resources
SC Environmental Sciences & Ecology; Agriculture; Water Resources
GA 448YE
UT WOS:000266297100007
ER
PT J
AU Stauffer, PH
Vrugt, JA
Turin, HJ
Gable, CW
Soll, WE
AF Stauffer, Philip H.
Vrugt, Jasper A.
Turin, H. Jake
Gable, Carl W.
Soll, Wendy E.
TI Untangling Diffusion from Advection in Unsaturated Porous Media:
Experimental Data, Modeling, and Parameter Uncertainty
SO VADOSE ZONE JOURNAL
LA English
DT Article
ID VAPOR-PHASE DIFFUSION; YUCCA MOUNTAIN; BUSTED-BUTTE; TRANSPORT; NEVADA;
TRACER; SOILS; TUFFS; ZONE; FLOW
AB We conducted a series of experimental and modeling tests using data from the Busted Butte Unsaturated Zone Transport Test. First, we conducted a suite of reactive (e. g., Li), nonreactive (Br), and colloidal tracer experiments. These tracers were injected for 190 d from two point sources at rates of 1 and 8 mL/h, respectively. We then used a numerical simulator (FEHM), populated with laboratory-measured hydrologic properties, to verify that our conceptual model of the tracer test yielded a good fit to the tracer breakthrough data. Additionally, we used the AMALGAM-SO and SCEM-UA search algorithms to find optimal parameter estimates in our conceptual model and estimate their (nonlinear) uncertainty. To this end, the FEHM model was executed more than 50,000times using parallel computing on a distributed computer cluster. The experimental and modeling results show that (i) no breakthrough of colloids was observed, low breakthroughs of Li were found, and significant and rapid breakthrough of Br was measured, (ii) measured hydraulic parameters from rock core samples provide a relatively accurate description of flow and transport at the scale and flow rates of the Busted Butte test, and (iii) the Millington-Quirk model of diffusion as a function of volumetric water content can fit the experimental breakthrough data well; however, (iv) a constant diffusion model with a much lower effective diffusion coefficient also fits the data well, and (v) numerous different optimized parameter combinations exist that fit the observed Br data acceptably well. This implies that one should be particularly careful in assigning values of the unsaturated subsurface flow and transport parameters without recourse to examining both parameter and model formulation uncertainty.
C1 [Stauffer, Philip H.; Vrugt, Jasper A.; Turin, H. Jake; Gable, Carl W.; Soll, Wendy E.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Stauffer, PH (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM stauffer@lanl.gov
RI Vrugt, Jasper/C-3660-2008; Stauffer, Philip/A-1384-2009; Gable,
Carl/B-4689-2011;
OI Stauffer, Philip/0000-0002-6976-221X; Gable, Carl/0000-0001-7063-0815
NR 46
TC 6
Z9 6
U1 0
U2 3
PU SOIL SCI SOC AMER
PI MADISON
PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA
SN 1539-1663
J9 VADOSE ZONE J
JI Vadose Zone J.
PD MAY
PY 2009
VL 8
IS 2
BP 510
EP 522
DI 10.2136/vzj2008.0055
PG 13
WC Environmental Sciences; Soil Science; Water Resources
SC Environmental Sciences & Ecology; Agriculture; Water Resources
GA 448YE
UT WOS:000266297100023
ER
PT J
AU Denmirkanli, DI
Molz, FJ
Kaplan, DI
Fjeld, RA
AF Denmirkanli, Deniz I.
Molz, Fred J.
Kaplan, Daniel I.
Fjeld, Robert A.
TI A Fully Transient Model for Long-Term Plutonium Transport in the
Savannah River Site Vadose Zone: Root Water Uptake (vol 7, pg 1099,
2008)
SO VADOSE ZONE JOURNAL
LA English
DT Correction
C1 [Denmirkanli, Deniz I.; Molz, Fred J.; Fjeld, Robert A.] Clemson Univ, Dept Environm Engn & Sci, LG Rich Environm Res Lab, Anderson, SC 29625 USA.
[Kaplan, Daniel I.] Savannah River Natl Lab, Aiken, SC 29808 USA.
RP Molz, FJ (reprint author), Clemson Univ, Dept Environm Engn & Sci, LG Rich Environm Res Lab, 342 Comp Court, Anderson, SC 29625 USA.
EM fredi@clemson.edu
NR 1
TC 0
Z9 0
U1 0
U2 1
PU SOIL SCI SOC AMER
PI MADISON
PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA
SN 1539-1663
J9 VADOSE ZONE J
JI Vadose Zone J.
PD MAY
PY 2009
VL 8
IS 2
BP 530
EP 530
DI 10.2136/vzj2007.0134er
PG 1
WC Environmental Sciences; Soil Science; Water Resources
SC Environmental Sciences & Ecology; Agriculture; Water Resources
GA 448YE
UT WOS:000266297100025
ER
PT J
AU Gaufin, T
Gautam, R
Kasheta, M
Ribeiro, R
Ribka, E
Barnes, M
Pattison, M
Tatum, C
MacFarland, J
Montefiori, D
Kaur, A
Pandrea, I
Apetrei, C
AF Gaufin, Thaidra
Gautam, Rajeev
Kasheta, Melissa
Ribeiro, Ruy
Ribka, Erin
Barnes, Mary
Pattison, Melissa
Tatum, Coty
MacFarland, Jeanne
Montefiori, David
Kaur, Amitinder
Pandrea, Ivona
Apetrei, Cristian
TI Limited ability of humoral immune responses in control of viremia during
infection with SIVsmmD215 strain
SO BLOOD
LA English
DT Article
ID SIMIAN IMMUNODEFICIENCY VIRUS; T-LYMPHOCYTE RESPONSES; AFRICAN-GREEN
MONKEYS; RHESUS MACAQUES; NEUTRALIZING ANTIBODIES; HIV-INFECTION;
IN-VIVO; MONOCLONAL-ANTIBODIES; PASSIVE IMMUNOTHERAPY; TYPE-1 INFECTION
AB We investigated the impact of rhesus macaque (RM) B-cell depletion before inoculation with the isolate SIVsmmD215. Seven RMs were treated every 3 weeks with 50 mg/kg of an anti-CD20 antibody ( rituximab) starting 7 days before inoculation for 2 (n = 4) and 5 ( n = 3) months. Four control animals received no antibody. Three animals were completely depleted of CD20(+) B cells, but 4 were only partially depleted of CD20 cells in the LNs and intestine. The decrease in antibody production was consistent with the efficacy of tissue CD20 depletion. Seroconversion and neutralizing antibody production was significantly delayed in animals showing complete tissue CD20 depletion and remained at low titers in all CD20-depleted RMs. Surprisingly, there was no significant difference in acute or chronic viral loads between CD20-depleted and control animal groups. There was a tendency for lower viral set points in CD20-depleted animals. At 6 weeks after inoculation, cellular immune responses were significantly stronger in CD20-depleted animals than in controls. There was no significant difference in survival between CD20-depleted and control animals. Our data suggest that a deficiency of Ab responses did not markedly affect viral replication or disease progression and that they may be compensated by more robust cellular responses. (Blood. 2009;113:4250-4261)
C1 [Gaufin, Thaidra; Gautam, Rajeev; Barnes, Mary; Pattison, Melissa; Tatum, Coty; MacFarland, Jeanne; Apetrei, Cristian] Tulane Natl Primate Res Ctr, Div Microbiol, Covington, LA 70433 USA.
[Kasheta, Melissa; Kaur, Amitinder] New England Primate Res Ctr, Div Immunol, Southborough, MA USA.
[Ribeiro, Ruy] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Ribka, Erin] Tulane Natl Primate Res Ctr, Div Vet Med, Covington, LA 70433 USA.
[Montefiori, David] Duke Univ, Dept Surg, Durham, NC USA.
[Pandrea, Ivona] Tulane Natl Primate Res Ctr, Div Comparat Pathol, Covington, LA 70433 USA.
[Apetrei, Cristian] Tulane Univ, Sch Publ Hlth, Dept Trop Med, New Orleans, LA 70118 USA.
[Pandrea, Ivona] Tulane Univ, Sch Med, Dept Pathol, New Orleans, LA 70118 USA.
RP Apetrei, C (reprint author), Tulane Natl Primate Res Ctr, Div Microbiol, 18703 3 Rivers Rd, Covington, LA 70433 USA.
EM capetrei@tulane.edu
OI Ribeiro, Ruy/0000-0002-3988-8241
FU National Institute of Allergy and Infectious Diseases [R01 AI065325, P20
RR020159, RO1AI064066, R21AI069935, AI30034, P51 RR000164]; National
Center for Research Resources, Bethesda, MD
FX This work was supported by grants R01 AI065325 and P20 RR020159 ( C.
A.), RO1AI064066 and R21AI069935 ( I. P.), AI30034 ( D. M.), and P51
RR000164 ( TNPRC) from the National Institute of Allergy and Infectious
Diseases and from the National Center for Research Resources, Bethesda,
MD.
NR 55
TC 21
Z9 21
U1 1
U2 2
PU AMER SOC HEMATOLOGY
PI WASHINGTON
PA 1900 M STREET. NW SUITE 200, WASHINGTON, DC 20036 USA
SN 0006-4971
J9 BLOOD
JI Blood
PD APR 30
PY 2009
VL 113
IS 18
BP 4250
EP 4261
DI 10.1182/blood-2008-09-177741
PG 12
WC Hematology
SC Hematology
GA 442MW
UT WOS:000265846300021
PM 19168789
ER
PT J
AU Nemura, H
Ishii, N
Aoki, S
Hatsuda, T
AF Nemura, H.
Ishii, N.
Aoki, S.
Hatsuda, T.
TI HYPERON-NUCLEON FORCES CALCULATED FROM LATTICE QCD
SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A
LA English
DT Article; Proceedings Paper
CT KGU Yokohama Autumn School of Nuclear Physics
CY OCT 09-10, 2008
CL Kanto Gakuin Univ, Kannai Media Ctr, Yokohama, JAPAN
SP Kanto Gakuin Univ
HO Kanto Gakuin Univ, Kannai Media Ctr
DE Lattice QCD calculations; hyperon-nucleon interactions
ID SCATTERING; MATRIX
AB We study the hyperon-nucleon (YN) forces by using quenched lattice QCD. The Bethe-Salpeter amplitudes are calculated for the lowest scattering state of the systems so as to obtain the YN potentials. The numerical calculation is twofold: (i) The p Xi(0) potentials and scattering lengths are obtained by using lattice QCD with beta = 5.7, the lattice spacing of a = 0.1416(9) fm, on the 32(3) x 32 lattice. Two kinds of ud quark mass are used, corresponding to m(pi) similar or equal to 0.37 GeV and 0.51 GeV. The spatial lattice volume is (4.5 fm)(3). The scattering lengths obtained from Luscher's formula show that the p Xi(0) interactions are both attractive at (1)S(0) and (3)S(1) channels, and the interaction in the 3S1 is more attractive than in the (1)S(0). These attractive forces become stronger as the u, d quark mass decreases. (ii) The p Lambda potentials are calculated. The lattice setup is almost same as the former calculation except for the temporal part. The calculation is performed on 32(3) x 48 lattice. Two kinds of ud quark mass are used, corresponding to m(pi) similar or equal to 0.47 GeV and 0.51 GeV. The lowest scattering energies in the finite lattice volume are calculated.
C1 [Nemura, H.] RIKEN, Strangeness Nucl Phys Lab, Nishina Ctr Accelerator Based Sci, Wako, Saitama 3510198, Japan.
[Ishii, N.] Univ Tsukuba, Ctr Computat Sci, Tsukuba, Ibaraki 3058571, Japan.
[Aoki, S.] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan.
[Aoki, S.] Brookhaven Natl Lab, Riken BNL Res Ctr, Upton, NY 11973 USA.
[Hatsuda, T.] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan.
RP Nemura, H (reprint author), RIKEN, Strangeness Nucl Phys Lab, Nishina Ctr Accelerator Based Sci, 2-1 Hirosawa, Wako, Saitama 3510198, Japan.
EM nemura@riken.jp; ishii@rarfaxp.riken.jp; saoki@het.ph.tsukuba.ac.jp;
hatsuda@phys.s.u-tokyo.ac.jp
RI Hatsuda, Tetsuo/C-2901-2013
NR 16
TC 0
Z9 0
U1 0
U2 0
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0217-751X
J9 INT J MOD PHYS A
JI Int. J. Mod. Phys. A
PD APR 30
PY 2009
VL 24
IS 11
BP 2110
EP 2117
PG 8
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 441WX
UT WOS:000265802300015
ER
PT J
AU Cowee, MM
Omidi, N
Russell, CT
Blanco-Cano, X
Tokar, RL
AF Cowee, M. M.
Omidi, N.
Russell, C. T.
Blanco-Cano, X.
Tokar, R. L.
TI Determining ion production rates near Saturn's extended neutral cloud
from ion cyclotron wave amplitudes
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID DISPERSION; ENCELADUS; PLASMA; TORUS
AB Recent Cassini observations of active venting of water molecules from Enceladus indicate that the moon is the primary source of Saturn's extended neutral cloud. Ionization of the neutrals through charge exchange creates a population of newborn ions with a velocity space distribution, which is highly unstable to the generation of electromagnetic ion cyclotron waves. Cassini observed such ion cyclotron waves, finding spatial and temporal variability in the wave amplitudes throughout the extended neutral cloud region. Since the amount of energy in the ion cyclotron waves is proportional to the number of newborn ions generating them, it is possible to infer the ion production rate in the region. To do so, we use two-dimensional electromagnetic hybrid (kinetic ions, fluid electrons) simulations to investigate the growth and nonlinear evolution of ion cyclotron waves. We focus on conditions near Enceladus' L shell and compare the simulated and observed ion cyclotron wave amplitudes to estimate the neutral densities and ion production rates. Our simulation results find a relatively linear relation between ion production rate and quasisteady wave energy level (delta B(2)). For conditions near Enceladus' L shell, we find that water group ion production rates of 0.007-0.014/cc/s (which yield wave amplitudes of similar to 0.1-0.3 nT) are appropriate. For ion production within an annulus volume from 3.9 to 4 R(S), we obtain ion production rates of 3.8 x 10(26) to 7.6 x 10(26) ions/s or 10.2-20.4 kg/s.
C1 [Cowee, M. M.; Tokar, R. L.] Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
[Omidi, N.] Solana Sci Inc, Solana Beach, CA 92075 USA.
[Russell, C. T.] Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095 USA.
[Blanco-Cano, X.] Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico.
RP Cowee, MM (reprint author), Los Alamos Natl Lab, Mail Stop D466,Grp ISR-1, Los Alamos, NM 87544 USA.
EM mcowee@lanl.gov
FU NASA [NNX07AJ07G]; University of California, Los Angeles
FX This research was supported by NASA grant NNX07AJ07G to Solana
Scientific, Inc. and University of California, Los Angeles. The authors
wish to thank to Jared Leisner and Peter Gary for useful discussion.
NR 16
TC 16
Z9 16
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD APR 30
PY 2009
VL 114
AR A04219
DI 10.1029/2008JA013664
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 440CK
UT WOS:000265675800001
ER
PT J
AU Zinkle, SJ
Ice, GE
Miller, MK
Pennycook, SJ
Wang, XL
AF Zinkle, S. J.
Ice, G. E.
Miller, M. K.
Pennycook, S. J.
Wang, X-L.
TI Advances in microstructural characterization
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID TRANSMISSION ELECTRON-MICROSCOPE; ANGLE NEUTRON-SCATTERING;
X-RAY-SCATTERING; DIFFRACTION MEASUREMENTS; MARTENSITIC STEELS;
RESIDUAL-STRESSES; FERRITIC ALLOYS; SANS DATA; RESOLUTION; TEMPERATURE
AB Timely development of materials for the demanding fusion energy environment requires a broad range of advanced scientific tools, including advanced structural characterization methods. The current state-of-the-art and emerging capabilities in electron microscopy, atom probe tomography, neutron scattering and X-ray scattering are reviewed with respect to potential applications in fusion materials research and development. Recent dramatic advances in capabilities in all four of these characterization tools are transforming the spatial precision and quantitative information that can be extracted during structural characterization. Examples include spectroscopic identification of single atoms in bulk materials, three-dimensional mapping of millimeter-scale volumes of materials with nanometer resolution, and high-resolution in situ measurements of internal stress and strain during mechanical testing. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Zinkle, S. J.; Ice, G. E.; Miller, M. K.; Pennycook, S. J.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Wang, X-L.] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
RP Zinkle, SJ (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, POB 2008, Oak Ridge, TN 37831 USA.
EM zinklesj@ornl.gov
RI Wang, Xun-Li/C-9636-2010;
OI Wang, Xun-Li/0000-0003-4060-8777; Zinkle, Steven/0000-0003-2890-6915
NR 69
TC 7
Z9 7
U1 3
U2 25
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
EI 1873-4820
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 8
EP 14
DI 10.1016/j.jnucmat.2008.12.302
PG 7
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900003
ER
PT J
AU Morishita, K
Watanabe, Y
Kohyama, A
Heinisch, HL
Gao, F
AF Morishita, K.
Watanabe, Y.
Kohyama, A.
Heinisch, H. L.
Gao, F.
TI Nucleation and growth of vacancy clusters in beta-SiC during irradiation
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID SILICON-CARBIDE
AB Molecular dynamics and molecular static calculations have been performed using the empirical many-body interatomic potential to obtain the formation and binding energies of relaxed configuration of vacancy clusters in beta-SiC, which are necessary when the nucleation and growth process of clusters is investigated. The formation energy of vacancy clusters in beta-SiC depends on the size, vacancy composition, and vacancy configuration of clusters. When the size and vacancy composition of clusters are given, the vacancy configuration of clusters with the lowest formation energy is primarily given so as to take the smallest number of dangling bonds. Especially when the fraction of the number of silicon vacancies to the number of carbon vacancies in a cluster is quite high or quite low, the formation property of antisite defects in clusters becomes a key factor to determine the stable configuration of clusters. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Morishita, K.; Watanabe, Y.; Kohyama, A.] Kyoto Univ, Inst Adv Energy, Kyoto 6110011, Japan.
[Heinisch, H. L.; Gao, F.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Morishita, K (reprint author), Kyoto Univ, Inst Adv Energy, Kyoto 6110011, Japan.
EM morishita@iae.kyoto-u.ac.jp
RI Gao, Fei/H-3045-2012
NR 9
TC 7
Z9 8
U1 0
U2 15
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 30
EP 32
DI 10.1016/j.jnucmat.2008.12.054
PG 3
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900008
ER
PT J
AU Gilbert, MR
Yao, Z
Kirk, MA
Jenkins, ML
Dudarev, SL
AF Gilbert, M. R.
Yao, Z.
Kirk, M. A.
Jenkins, M. L.
Dudarev, S. L.
TI Vacancy defects in Fe: Comparison between simulation and experiment
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID HEAVY-ION IRRADIATIONS; MOLECULAR-DYNAMICS; DISLOCATION LOOPS; DAMAGE
EVOLUTION; THIN-FOILS; IRON; ACCUMULATION
AB The evolution of radiation damage under heavy-ion irradiation in thin foils of pure bcc Fe has been investigated by simulation and experiment. Simulations showed that vacancy loops are about as mobile as interstitial loops, and can be lost to the surface of a foil. Consistent with this, in situ real-time dynamic observations of the damage evolution showed that loops, many of which are believed to be of vacancy nature, were mobile and were often lost during irradiation. Atomistic simulations of vacancy defects in Fe showed that spherical voids, rather than vacancy loops, represent the lowest energy configurations for clusters of vacancies of any size. The simulations also indicated that the stability of loops strongly varies depending on their size. Closed loops above a critical diameter (similar to 2 nm) are highly metastable due to the difficulty of their transformation into voids. The greater stability of voids explains why the loop yield in Fe and other ferritic materials is very low. (c) 2009 M.R. Gilbert. Published by Elsevier B.V. All rights reserved.
C1 [Gilbert, M. R.; Dudarev, S. L.] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England.
[Gilbert, M. R.; Yao, Z.; Jenkins, M. L.] Univ Oxford, Dept Mat, Oxford OX1 3PH, England.
[Kirk, M. A.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Dudarev, S. L.] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England.
RP Gilbert, MR (reprint author), UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England.
EM mark.gilbert@ukaea.org.uk
OI Gilbert, Mark/0000-0001-8935-1744
NR 14
TC 16
Z9 17
U1 2
U2 35
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 36
EP 40
DI 10.1016/j.jnucmat.2008.12,055
PG 5
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900010
ER
PT J
AU Shcherbakov, EN
Kozlov, AV
Yagovitin, PI
Evseev, MV
Kinev, EA
Panchenko, VL
Isobe, I
Sagisaka, M
Okita, T
Sekimura, N
Garner, FA
AF Shcherbakov, E. N.
Kozlov, A. V.
Yagovitin, P. I.
Evseev, M. V.
Kinev, E. A.
Panchenko, V. L.
Isobe, I.
Sagisaka, M.
Okita, T.
Sekimura, N.
Garner, F. A.
TI Influence of damage rate on physical and mechanical properties and
swelling of 18Cr-9Ni austenitic steel in the range of 3 x 10(-9) to 4 x
10(-8) dpa/s
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
AB The results of the examination of the specimens constructed from the Fe-18Cr-9Ni steel thick-wall pipe irradiated at temperatures 370-375 degrees C to damage rates from 1.5 to 21 dpa at displacement rates from 3 x 10(-9) to 4 x 10(-8) dpa/s are presented. Electrical resistance. elasticity characteristics and radiation swelling of this material under different irradiation conditions were measured. Changes in the microstructure of the steel, in particular, the porosity characteristics dependent on a damage rate are shown. (C) 2009 Published by Elsevier B.V.
C1 [Shcherbakov, E. N.; Kozlov, A. V.; Yagovitin, P. I.; Evseev, M. V.; Kinev, E. A.; Panchenko, V. L.] FSUE Inst Nucl Mat, Zarechnyi, Russia.
[Isobe, I.; Sagisaka, M.] Nucl Fuels Ltd, Osaka, Japan.
[Okita, T.] Univ Tokyo, Tokyo, Japan.
[Sekimura, N.; Garner, F. A.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Shcherbakov, EN (reprint author), FSUE Inst Nucl Mat, Zarechnyi, Russia.
EM sfti@uraltc.ru
NR 5
TC 3
Z9 3
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 152
EP 156
DI 10.1016/j.jnucmat.2008.12.080
PG 5
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900040
ER
PT J
AU Neustroev, VS
Garner, FA
AF Neustroev, V. S.
Garner, F. A.
TI Severe embrittlement of neutron irradiated austenitic steels arising
from high void swelling
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID ALLOYS
AB Data are presented from BOR-60 irradiations showing that significant radiation-induced swelling causes severe embrittlement in austenitic stainless steels, reducing the service life of structural components and introducing limitations on low temperature handling especially. It is shown that the degradation is actually a form of quasi-embrittlement arising from intense flow localization with high levels of localized ductility involving micropore coalescence and void-to-void cracking. Voids initially serve as hardening components whose effect is overwhelmed by the void-induced reduction in shear and Young's moduli at high swelling levels. Thus the alloy appears to soften even as the ductility plunges toward zero on a macroscopic level although a large amount of deformation occurs microscopically at the failure site. Thus the failure is better characterized as "quasi-embrittlement" which is a suppression of uniform deformation. This case should be differentiated from that of real embrittlement which involves the complete suppression of the material's capability for plastic deformation. (C) 2009 Published by Elsevier B.V.
C1 [Neustroev, V. S.] FSUE SSC RF Res Inst Atom Reactors, Dimitrovgrad, Russia.
[Garner, F. A.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Neustroev, VS (reprint author), FSUE SSC RF Res Inst Atom Reactors, Dimitrovgrad, Russia.
EM neustroev@niiar.ru
NR 24
TC 7
Z9 7
U1 6
U2 15
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 157
EP 160
DI 10.1016/j.jnucmat.2008.12.077
PG 4
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900041
ER
PT J
AU Ono, K
Miyamoto, M
Arakawa, K
Birtcher, RC
AF Ono, Kotaro
Miyamoto, Mitsutaka
Arakawa, Kazuto
Birtcher, R. C.
TI Dynamical interaction of helium bubbles with cascade damage in Fe-9Cr
ferritic alloy
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID BEHAVIOR; IONS
AB Dynamic interaction of helium bubble with cascade damage in Fe-9Cr ferritic alloy has been studied using in situ irradiation and electron microscopy. During the irradiation of the alloy by 400 keV Fe(+) ions at temperatures where no thermal motion takes place, induced displacement of small helium bubbles was observed: the bubbles underwent sporadic and instant displacement. The displacement was of the order of a few nanometers. The experimentally determined displacement probability of helium bubbles is consistent with the calculated probability of their dynamic interaction with sub-cascades introduced by the irradiation. Furthermore, during the irradiation of the alloy at higher temperatures, both retarded and accelerated Brownian type motions were observed. These results are discussed on the basis of dynamic interaction of helium bubbles with point defects that survive through high-energy self-ion irradiation. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Ono, Kotaro; Miyamoto, Mitsutaka] Shimane Univ, Dept Mat Sci, Matsue, Shimane 6908504, Japan.
[Arakawa, Kazuto] Osaka Univ, UHV EM Ctr, Suita, Osaka 5650871, Japan.
[Birtcher, R. C.] Argonne Natl Lab, MSD, Argonne, IL 60439 USA.
RP Ono, K (reprint author), Shimane Univ, Dept Mat Sci, 1060 Nishi Kawatsu, Matsue, Shimane 6908504, Japan.
EM k-ono@riko.shimane-u.ac.jp
NR 11
TC 3
Z9 4
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 177
EP 180
DI 10.1016/j.jnucmat.2008.12.087
PG 4
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900046
ER
PT J
AU Okita, T
Sekimura, N
Garner, FA
AF Okita, T.
Sekimura, N.
Garner, F. A.
TI The conflicting roles of boron on the radiation response of
precipitate-forming austenitic alloys at similar to 400 degrees C
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
AB The behavior of void swelling at similar to 400 degrees C of model f.c.c. alloy Fe-15Cr-16Ti-0.25Ti-0.05 C doped with boron was examined in the FFTF-MOTA. Boron additions modify the neutron-induced swelling of Fe-15Cr-16Ni-0.25Ti-0.05 C somewhat, but the changes appear to arise primarily from the influence of boron as a chemical species rather than as a source of helium. Boron additions initially depress swelling strongly, but the effect saturates by <100 appm. The reduction in swelling is thought to arise from boron's influence on distribution and precipitation of carbon. As the boron level is raised to significantly larger levels swelling begins to increase, but at a slower rate per boron atom. This subsequent increase is thought to reflect the higher He/dpa ratio generated by the boron, overwhelming the helium produced by (n, alpha) reactions with nickel. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Okita, T.; Sekimura, N.] Univ Tokyo, Dept Quantum Engn & Syst Sci, Tokyo, Japan.
[Garner, F. A.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Okita, T (reprint author), Univ Tokyo, Dept Quantum Engn & Syst Sci, Tokyo, Japan.
EM okita@q.t.u-tokyo.ac.jp
NR 4
TC 0
Z9 0
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 185
EP 187
DI 10.1016/j.jnucmat.2008.12.315
PG 3
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900048
ER
PT J
AU Klueh, RL
Shiba, K
Sokolov, MA
AF Klueh, R. L.
Shiba, K.
Sokolov, M. A.
TI Embrittlernent of irradiated F82H in the absence of irradiation
hardening
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID ACTIVATION FERRITIC/MARTENSITIC STEELS; CHARPY IMPACT PROPERTIES;
FRACTURE-TOUGHNESS; MARTENSITIC STEELS; TENSILE PROPERTIES; BEHAVIOR;
HFIR; 9CR-1MOVNB
AB Neutron irradiation of 7-12% Cr ferritic/martensitic steels below 425-450 degrees C produces microstructural defects and precipitation that cause an increase in yield stress. This irradiation hardening causes embrittlement, which is observed in a Charpy impact or fracture toughness test as an increase in the ductile-brittle transition temperature. Based on observations that show little change in strength in steels irradiated above 425-450 degrees C, the general conclusion has been that no embrittlement occurs above these temperatures. In a recent study of F82H steel, significant embrittlement was observed after irradiation at 500 degrees C, but no hardening occurred. This embrittlement is apparently due to irradiation-accelerated Laves-phase precipitation. Observations of the embrittlement of F82H in the absence of irradiation hardening have been examined and analyzed with thermal-aging studies and computational thermodynamics calculations to illuminate and understand the embrittlement during irradiation. Published by Elsevier B.V.
C1 [Klueh, R. L.; Sokolov, M. A.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Shiba, K.] Japan Atom Energy Agcy, Toki, Ibaraki, Japan.
RP Klueh, RL (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM kluehrl@ornl.gov
NR 23
TC 9
Z9 10
U1 2
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 191
EP 194
DI 10.1016/j.jnucmat.2008.12.090
PG 4
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900050
ER
PT J
AU Kondo, S
Katoh, Y
Snead, LL
AF Kondo, S.
Katoh, Y.
Snead, L. L.
TI Cavity swelling and dislocation evolution in SiC at very high
temperatures
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID SILICON-CARBIDE; NEUTRON-IRRADIATION; MICROSTRUCTURE; BEHAVIOR
AB The temperature and fluence dependence of cavity swelling and dislocation development in CVD SiC irradiated with fast neutrons at high temperatures (1050-1460 degrees C, up to 9.6 dpa) were evaluated using transmission electron microscopy. The cavity swelling was very limited below 1300 degrees C (<0.01% at 1300 degrees C, 9.3 dpa). Temperature and fluence dependent swelling became visible above similar to 1400 degrees C. The maximum value of the cavity swelling was 0.25% at 1460 degrees C, 9.6 dpa, but this appeared to be below the peak swelling temperature. Frank loops were the dominant dislocation structure in this temperature regime, and the number density decreased and the size increased with increasing irradiation temperature. The loop microstructures depended less significantly on both the irradiation temperature and fluence below 1200 degrees C. A significant decrease in the number density and increase in the size were observed at 1300-1460 degrees C. Published by Elsevier B.V.
C1 [Kondo, S.; Katoh, Y.; Snead, L. L.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37830 USA.
RP Kondo, S (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, POB 2008, Oak Ridge, TN 37830 USA.
EM kondos1@ornl.gov
OI Katoh, Yutai/0000-0001-9494-5862
NR 13
TC 14
Z9 15
U1 2
U2 22
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 222
EP 226
DI 10.1016/j.jnucmat.2008.12.095
PG 5
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900058
ER
PT J
AU Wong, KL
Lee, HJ
Shim, JH
Sadigh, B
Wirth, BD
AF Wong, Kwan L.
Lee, Hyon-Jee
Shim, Jae-Hyeok
Sadigh, Babak
Wirth, Brian D.
TI Multiscale modeling of point defect interactions in Fe-Cr alloys
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; MOLECULAR-DYNAMICS;
IRRADIATION; DIFFUSION; RADIATION; REACTOR; METALS
AB Predictive performance models of ferritic/martensitic alloys in fusion neutron irradiation environments require knowledge of point defect interactions with Cr, which can be investigated by a multiscale modeling approach. Molecular dynamics simulations, using Finnis-Sinclair-type potentials, have been used to investigate the interstitial diffusion and reveal that the extremes of attractive and repulsive binding between Cr and interstitials change the characteristics of interstitial migration and the Cr-to-Fe diffusivity ratio. Ab-initio calculations have been performed to determine the vacancy-Cr interactions, and these calculations reveal complex electronic and magnetic interactions between Cr and Fe. The ab-initio values have been used to calculate the Cr-to-Fe diffusivity ratio by a vacancy mechanism using the LeClaire multi-frequency model and a kinetic lattice Monte Carlo model, both of which indicate that Cr diffuses faster than Fe. The modeling results are discussed in the context of the radiation-induced segregation of Cr at grain boundaries in BCC Fe-Cr alloys. (C) 2009 Published by Elsevier B.V.
C1 [Wong, Kwan L.; Lee, Hyon-Jee; Shim, Jae-Hyeok; Wirth, Brian D.] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA.
[Shim, Jae-Hyeok] Korea Adv Inst Sci & Technol, Nanomat Res Ctr, Seoul 136791, South Korea.
[Sadigh, Babak] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Wong, KL (reprint author), Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA.
EM kevwong@socrares.berkeley.edu
RI Wirth, Brian/O-4878-2015
OI Wirth, Brian/0000-0002-0395-0285
NR 30
TC 15
Z9 15
U1 2
U2 28
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 227
EP 230
DI 10.1016/j.jnucmat.2008.12.092
PG 4
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900059
ER
PT J
AU Tanigawa, H
Klueh, RL
Hashimoto, N
Sokolov, MA
AF Tanigawa, Hiroyasu
Klueh, Ronald L.
Hashimoto, Naoyuki
Sokolov, Mikhail A.
TI Hardening mechanisms of reduced activation ferritic/martensitic steels
irradiated at 300 degrees C
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID FERRITIC STEELS; MICROSTRUCTURE
AB It has been reported that reduced-activation ferritic/martensitic steels (RAFMs), such as F82H, ORNL9Cr-2WVTa, and JLF-1 showed a variety of changes in ductile-brittle transition temperature and yield stress after irradiation at 300 degrees C up to 5 dpa, and those differences could not be interpreted solely by the difference of dislocation microstructure induced by irradiation. In this paper, various microstructural analyses on low-temperature irradiated RAFMs were summarized with the emphasis on F82H, and a possible mechanism for the irradiation hardening was suggested. The possible contribution of dislocation channeling structure and back stress were indicated. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Tanigawa, Hiroyasu] Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan.
[Klueh, Ronald L.; Sokolov, Mikhail A.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
[Hashimoto, Naoyuki] Hokkaido Univ, Sapporo, Hokkaido, Japan.
RP Tanigawa, H (reprint author), Japan Atom Energy Agcy, 2-4 Shirakata Shirane, Tokai, Ibaraki 3191195, Japan.
EM tanigawa.hiroyasu@jaea.go.jp
RI HASHIMOTO, Naoyuki/D-6366-2012
NR 16
TC 17
Z9 17
U1 1
U2 15
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 231
EP 235
DI 10.1016/j.jnucmat.2008.12.094
PG 5
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900060
ER
PT J
AU Garner, FA
Flinn, JE
Hall, MM
AF Garner, F. A.
Flinn, J. E.
Hall, M. M.
TI Anisotropic swelling observed during stress-free reirradiation of AISI
304 tubes previously irradiated under stress
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID CREEP
AB A 'history effects' experiment was conducted in EBR-II that involved the reirradiation of AISI 304 cladding and Capsule tubes. It is shown that when irradiated tubes had not previously experienced stress, subsequent irradiation led to additional swelling strains that were isotropically distributed. However, when tubes previously irradiated under a 2:1 biaxial stress were reirradiated without stress the additional swelling strains were not isotropically distributed. The tubes obviously retained a memory of the previous stress state that appears to be attempting to distribute strains in the directions dictated by the previous stress state. It is clear, however, that the memory of that stress state is fading as the anisotropic dislocation microstructure developed during irradiation under stress is replaced by an isotropic dislocation microstructure during subsequent exposure in the absence of stress. It is also shown that once the transient regime of swelling nears completion, further changes in stress state or irradiation temperature have no influence on the swelling rate thereafter. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Garner, F. A.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Flinn, J. E.] EBR II Project, Argonne Natl Lab, Idaho Falls, ID USA.
[Hall, M. M.] Bechtel Bettis Co, W Mifflin, PA USA.
RP Garner, FA (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM frank.garner@dslextreme.com
NR 12
TC 5
Z9 6
U1 3
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 249
EP 253
DI 10.1016/j.jnucmat.2008.12.105
PG 5
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900064
ER
PT J
AU Gusev, MN
Maksimkin, OP
Osipov, IS
Garner, FA
AF Gusev, M. N.
Maksimkin, O. P.
Osipov, I. S.
Garner, F. A.
TI Anomalously large deformation of 12Cr18Ni10Ti austenitic steel
irradiated to 55 dpa at 310 degrees C in the BN-350 reactor
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
AB Whereas most previous irradiation studies conducted at lower neutron exposures in the range 100-400 degrees C have consistently produced strengthening and strongly reduced ductility in stainless steels, it now appears possible that higher exposures may lead to a reversal in ductility loss for some steels. A new radiation-induced phenomenon has been observed in 12Cr18Ni10Ti stainless steel irradiated to 55 dpa. It involves a 'moving wave of plastic deformation' at 20 degrees C that produces 'anomalously' high values of engineering ductility, especially when compared to deformation occurring at lower neutron exposures. Using the technique of digital optical extensometry the 'true stress sigma-true strain epsilon' curves were obtained. It was shown that a moving wave of plastic deformation occurs as a result of an increase in the intensity of strain hardening, d sigma/d epsilon(epsilon). The increase in strain hardening is thought to arise from an irradiation-induced increase in the propensity of the gamma -> alpha martensitic transformation. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Gusev, M. N.; Maksimkin, O. P.; Osipov, I. S.] Inst Nucl Phys, Alma Ata, Kazakhstan.
[Garner, F. A.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Gusev, MN (reprint author), Inst Nucl Phys, Alma Ata, Kazakhstan.
EM gusev.maxim@inp.kz
RI Maksimkin, Oleg/M-8820-2015
NR 11
TC 8
Z9 8
U1 1
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 273
EP 276
DI 10.1016/j.jnucmat.2008.12.115
PG 4
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900070
ER
PT J
AU McClintock, DA
Hoelzer, DT
Sokolov, MA
Nanstad, RK
AF McClintock, D. A.
Hoelzer, D. T.
Sokolov, M. A.
Nanstad, R. K.
TI Mechanical properties of neutron irradiated nanostructured ferritic
alloy 14YWT
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID STABILITY; STEEL
AB Advanced nanostructured ferritic alloys (NFAs) containing a high density of ultra-fine (2-5 nm) nanoclusters (NCs) enriched in Y, Ti, and O are considered promising candidates for structural components in future nuclear systems. The superior tensile strengths of NFAs relative to conventional oxide dispersion strengthened ferritic alloys are attributed to the high number density of NCs, which may provide effective trapping centers for point defects and transmutation products produced during neutron irradiation. This paper summarizes preliminary tensile and fracture toughness data for an advanced NFA, designated 14YWT, currently being developed at Oak Ridge National Laboratory. For this study, an alloy designated 14WT was manufactured using the same production parameters used to produce 14YWT but without the Y(2)O(3) addition during ball milling required for NC formation in order to quantify the effect of the NCs on mechanical properties. Tensile specimens produced from both alloys were irradiated at 300, 580, and 670 degrees C to 1.5 displacements per atom (dpa), while 14YWT fracture toughness specimens were irradiated at 300 degrees C to 1.5 dpa. Tensile strengths for 14YWT were found to be about two times greater than 14WT for both irradiated and unirradiated conditions, with yield strength for 14YWT decreasing from similar to 1450 MPa at 26 degrees C to similar to 700 MPa at 600 degrees C. Moderate radiation-induced hardening (50-200 MPa) and reduction in ductility was observed for 14YWT for all irradiation conditions and test temperatures. In contrast, 14WT exhibited significant hardening (similar to 250 MPa) for the 300 degrees C irradiated specimens, while almost no hardening was observed for the 580 and 670 degrees C irradiated specimens. Fracture toughness results showed 14YWT in the unirradiated condition had a fracture toughness transition temperature (FTTT) around -150 degrees C and upper-shelf K(JIc) values around 175 MPa root m. Results from irradiated 14YWT fracture toughness tests were found to closely mirror the unirradiated data and no shift in FTTT or decrease in K(JIc) values were observed following neutron irradiation to 1.5 dpa at 300 degrees C. (C) 2009 Elsevier B.V. All rights reserved.
C1 [McClintock, D. A.; Hoelzer, D. T.; Sokolov, M. A.; Nanstad, R. K.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
[McClintock, D. A.] Univ Texas Austin, Austin, TX 78712 USA.
RP McClintock, DA (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Div, POB 2008,Bldg 4500S,MS 6151, Oak Ridge, TN 37831 USA.
EM mcclintockda@ornl.gov
RI Hoelzer, David/L-1558-2016;
OI McClintock, David/0000-0002-9292-8951
NR 9
TC 44
Z9 44
U1 2
U2 18
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 307
EP 311
DI 10.1016/j.jnucmat.2008.12.104
PG 5
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900078
ER
PT J
AU Ando, M
Tanigawa, H
Wakai, E
Stoller, RE
AF Ando, M.
Tanigawa, H.
Wakai, E.
Stoller, R. E.
TI Effect of two-steps heat treatments on irradiation hardening in F82H
irradiated at 573 K
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID FERRITIC/MARTENSITIC STEEL
AB Irradiation hardening and embrittlement due to neutron irradiation around 573 K are the important issues on RAF/M steels. It is expected that the improvement of irradiation hardening might be one of effective ways to control the mechanical properties of RAF/M after irradiation. In this study, the purposes are to investigate the effect of heat treatments on irradiation hardening of irradiated F82H variants and to compare the irradiation hardening based on Delta Hardness with the irradiation hardening obtained by Delta Yield Stress about F82H. Neutron irradiation was performed in HFIR at 573 K. The ion-beam irradiation experiment at similar to 573 K was carried out at the TIARA facility of JAEA. For the results of tensile test and hardness test of F82H and F82H heat treatment variants neutron-irradiated at 573 K, all specimens caused irradiation hardening. The irradiation hardening (Delta Hardness) obtained by hardness test is almost same level for neutron- and ion-irradiated F82H specimens, however irradiation hardening (Delta Yield Stress) of F82H Mod-1 A (two-steps heat treated F82H; high temperature tempering and then low temperature tempering) is smaller than that of F82H. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Ando, M.; Tanigawa, H.; Wakai, E.] Japan Atom Energy Agcy, Naka, Ibaraki 3191195, Japan.
[Stoller, R. E.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Ando, M (reprint author), Japan Atom Energy Agcy, Naka, Ibaraki 3191195, Japan.
EM ando.masami@jaea.go.jp
RI Stoller, Roger/H-4454-2011; Wakai, Eiichi/L-1099-2016
NR 7
TC 11
Z9 11
U1 0
U2 9
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 315
EP 318
DI 10.1016/j.jnucmat.2008.12.123
PG 4
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900080
ER
PT J
AU Yamamoto, T
Odette, GR
Miao, P
Edwards, DJ
Kurtz, RJ
AF Yamamoto, T.
Odette, G. R.
Miao, P.
Edwards, D. J.
Kurtz, R. J.
TI Helium effects on microstructural evolution in tempered martensitic
steels: In situ helium implanter studies in HFIR
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID RELEVANT HE/DPA RATIOS; DPA RATES; EMBRITTLEMENT; IRRADIATION;
TRANSPORT; FATE
AB Microstructural evolutions in tempered martensitic steels (TMS) under neutron-irradiation, at fusion relevant He/dpa ratios and dpa rates, were characterized using a novel in situ He-implanter technique. F82H-mod3 was irradiated at 500 degrees C in HFIR to a nominal 9 dpa and 190 or 380 appm He in both in the as-tempered (AT) and 20% cold-worked (CW) conditions. In all cases, a high number density of 1-2 nm He-bubbles were observed, along with fewer but larger approximate to 10 nm void-like faceted cavities. The He-bubbles form preferentially on dislocations and various interfaces. A slightly larger number of smaller He bubbles were observed in the CW condition. The lower He/dpa ratio produced slightly smaller and fewer He-bubbles. Comparisons of these observations to the results in nano-structured ferritic alloy (NFA) MA957 provide additional evidence that TMS may be susceptible to He-embrittlement as well as void swelling at fusion relevant He concentrations, while NFA are much more resistant to these degradation phenomena. (C) 2009 Published by Elsevier B.V.
C1 [Yamamoto, T.; Odette, G. R.; Miao, P.] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
[Edwards, D. J.; Kurtz, R. J.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Yamamoto, T (reprint author), Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
EM yamataku@engineering.ucsb.edu
NR 14
TC 20
Z9 20
U1 1
U2 20
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 338
EP 341
DI 10.1016/j.jnucmat.2008.12.134
PG 4
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900085
ER
PT J
AU Oliver, BM
Dai, Y
AF Oliver, B. M.
Dai, Y.
TI Helium and hydrogen measurements on pure materials irradiated in SINQ
Target 4
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID SYSTEM; METALS; LANSCE
AB Several irradiations have been performed in the Swiss Spallation Neutron Source (SINQ) to establish a materials database for mixed proton and neutron fluxes for future spallation neutron and other accelerator sources. Pure metal dosimetry materials from the second irradiation (STIP-II) have been analyzed for their total helium and hydrogen contents and their release characteristics with temperature (TDS). Total helium results are similar to those observed earlier from the first irradiation experiment (STIP-I). with concentrations ranging from similar to 500 to similar to 1000 appm. Hydrogen contents varied over a larger range from similar to 100 to similar to 60000. (3)He/(4)He ratios were generally consistent with expectations, except for Ti, Nb, and Ta which showed lower values due to (3)He from decay of irradiation-generated tritium. Some differences were observed in the hydrogen TDS data for the control and irradiated materials, including some evidence for additional lower-temperature release and for multiple release peaks. Additionally, differences were noted in the releases for irradiated material that been cleaned versus material that had no cleaning. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Oliver, B. M.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Dai, Y.] Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
RP Oliver, BM (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA.
EM brian.oliver@pnl.gov
NR 7
TC 1
Z9 1
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 383
EP 386
DI 10.1016/j.jnucmat.2008.12.160
PG 4
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900097
ER
PT J
AU Gao, F
Heinisch, HL
Kurtz, RJ
AF Gao, F.
Heinisch, H. L.
Kurtz, R. J.
TI Migration of vacancies, He interstitials and He-vacancy clusters at
grain boundaries in alpha-Fe
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID COMPUTER-SIMULATION; DIMER METHOD; HELIUM; DEFECTS; DISLOCATIONS;
DIFFUSION; IRON
AB The dinner method for searching transition states has been used to systematically study possible migration paths of vacancies, He interstitials and He-vacancy (He/V) clusters at Sigma 11 < 110 > {323} and Sigma 3 < 110 > {111} grain boundaries (GBs) in alpha-Fe. Vacancies trapped at the GBs diffuse along the GBs with migration energies much less than that within the perfect crystal. Long-time dynamics simulations of diffusion pathways reveal that vacancies migrate one-dimensionally along specific directions in both GBs: directly along close-packed rows in the Sigma 3 GB, and in zigzag paths within the Sigma 11 GB. Also, dimer saddle point searches show that He interstitials can diffuse along the GBs with migration energies of 0.4-0.5 eV, similar to those of individual vacancies at the GBs, and the corresponding mechanisms are determined. The rate-controlling activation energy for migration of a He-divacancy cluster in the GBs determined using the dimer method is about 0.9 eV. This is comparable to the migration energy for a He-divacancy cluster in bulk alpha-Fe. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Gao, F.; Heinisch, H. L.; Kurtz, R. J.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Gao, F (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM Fei.Gao@pnl.gov
RI Gao, Fei/H-3045-2012
NR 18
TC 23
Z9 23
U1 1
U2 18
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 390
EP 394
DI 10.1016/j.jnucmat.2008.12.159
PG 5
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900099
ER
PT J
AU Kurtz, RJ
Alamo, A
Lucon, E
Huang, Q
Jitsukawa, S
Kimura, A
Klueh, RL
Odette, GR
Petersen, C
Sokolov, MA
Spatig, P
Rensman, JW
AF Kurtz, R. J.
Alamo, A.
Lucon, E.
Huang, Q.
Jitsukawa, S.
Kimura, A.
Klueh, R. L.
Odette, G. R.
Petersen, C.
Sokolov, M. A.
Spaetig, P.
Rensman, J. -W.
TI Recent progress toward development of reduced activation
ferritic/martensitic steels for fusion structural applications
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID FATIGUE-OXIDATION INTERACTIONS; CONTAINING MARTENSITIC STEELS;
MECHANICAL-PROPERTIES; HOLDING PERIOD; VACUUM VESSEL; HELIUM;
IRRADIATION; CREEP; COMPONENTS; ITER
AB Significant progress has been achieved in the international research effort on reduced activation ferritic/martensitic steels for fusion structural applications. Because this class of steels is the leading structural material for test blankets in ITER and future fusion power systems, the range of ongoing research activities is extremely broad. Since, it is not possible to discuss all relevant work in this brief review, the objective of this paper is to highlight significant issues that have received recent attention. These include: (1) efforts to measure and understand radiation-induced hardening and embrittlement at temperatures <= 400 degrees C, (2) experiments and modeling to characterize the effects of He on microstructural evolution and mechanical properties, (3) exploration of approaches for increasing the high-temperature (>550 degrees C) creep resistance by introduction of a high-density of nanometer scale dispersoids or precipitates in the microstructure, (4) progress toward structural design criteria to account for loading conditions involving both creep and fatigue, and (5) development of nondestructive examination methods for flaw detection and evaluation. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Kurtz, R. J.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Alamo, A.] CEA Saclay, DEN DSOE, F-91191 Gif Sur Yvette, France.
[Lucon, E.] CEN SCK, NMS, B-2400 Mol, Belgium.
[Huang, Q.] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China.
[Jitsukawa, S.] Japan Atom Energy Agcy, Tokyo, Japan.
[Kimura, A.] Kyoto Univ, Kyoto, Japan.
[Klueh, R. L.; Sokolov, M. A.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
[Odette, G. R.] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
[Petersen, C.] FZK IMF, Karlsruhe, Germany.
[Spaetig, P.] EPFL, Assoc Euratom Confederat Suisse, CRPP, CH-5232 Villigen, Switzerland.
[Rensman, J. -W.] NRG, Petten, Netherlands.
RP Kurtz, RJ (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA.
EM rj.kurtz@pnl.gov
OI Lucon, Enrico/0000-0002-3021-4785
NR 45
TC 61
Z9 63
U1 5
U2 38
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 411
EP 417
DI 10.1016/j.jnucmat.2008.12.323
PG 7
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900103
ER
PT J
AU Fukumoto, K
Narui, M
Matsui, H
Nagasaka, T
Muroga, T
Li, M
Hoelzer, DT
Zinkle, SJ
AF Fukumoto, K.
Narui, M.
Matsui, H.
Nagasaka, T.
Muroga, T.
Li, M.
Hoelzer, D. T.
Zinkle, S. J.
TI Environmental effects on irradiation creep behavior of highly purified
V-4Cr-4Ti alloys (NIFS-Heats) irradiated by neutrons
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID BIAXIAL THERMAL CREEP; VANADIUM ALLOYS; 700-DEGREES-C; 800-DEGREES-C
AB In order to investigate the effect of the environment on the irradiation creep properties of highly purified V-4Cr-4Ti alloys, neutron irradiation experiments with sodium-enclosed irradiation capsules in Joyo and lithium-enclosed irradiation capsules in HFIR-17J were carried out using pressurized creep tubes (PCTs). It was found that the creep strain rate exhibited a linear relationship with the effective stress up to 150 Mpa at 458 and 598 degrees C in the Joyo irradiation experiments. For HFIR-17J irradiation at 425 degrees C, the creep strain rate also exhibited a linear relationship with the effective stress up to 150 Mpa. The activation energy of the irradiation creep and irradiation creep stress factor were estimated to be 46 kJ/mol K and 1-2, respectively. No significant difference in the irradiation creep behavior between liquid-sodium and liquid-lithium environments could be seen. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Fukumoto, K.] Univ Fukui, Grad Sch Nucl Power & Energy Safety Engn, Fukui 9108507, Japan.
[Narui, M.; Matsui, H.] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan.
[Nagasaka, T.; Muroga, T.] Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan.
[Li, M.; Hoelzer, D. T.; Zinkle, S. J.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Fukumoto, K (reprint author), Univ Fukui, Grad Sch Nucl Power & Energy Safety Engn, Bunkyo 2-1-1, Fukui 9108507, Japan.
EM fukumoto@mech.fukui-u.ac.jp
RI Hoelzer, David/L-1558-2016;
OI Zinkle, Steven/0000-0003-2890-6915
NR 12
TC 6
Z9 6
U1 2
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 575
EP 578
DI 10.1016/j.jnucmat.2008.12.180
PG 4
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900143
ER
PT J
AU Li, MM
Hoelzer, DT
Grossbeck, ML
Rowcliffe, AF
Zinkle, SJ
Kurtz, RJ
AF Li, Meimei
Hoelzer, D. T.
Grossbeck, M. L.
Rowcliffe, A. F.
Zinkle, S. J.
Kurtz, R. J.
TI Irradiation creep of the US Heat 832665 of V-4Cr-4Ti
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID VANADIUM-BASE ALLOYS; BIAXIAL THERMAL CREEP; LITHIUM ENVIRONMENT;
800-DEGREES-C; 700-DEGREES-C; BEHAVIOR; TUBES
AB The paper presents irradiation creep data for V-4Cr-4Ti irradiated to 3.7 dpa at 425 and 600 degrees C in the HFIR-17J experiment. Creep deformation was characterized by measuring diametral changes of pressurized creep tubes before and after irradiation. It was found that the creep strain rate of the US Heat 832665 of V-4Cr-4Ti exhibited a linear relationship with stress up to similar to 180 MPa at 425 degrees C with a creep coefficient of 2.50 x 10(-6) MPa(-1) dpa(-1). A linear relationship between creep rate and applied stress was observed below similar to 110 MPa at 600 degrees C with a creep coefficient of 5.41 x 10(-6) MPa(-1) dpa(-1); non-linear creep behavior was observed above similar to 110 MPa, and it may not be fully accounted by invoking thermal creep. The bilinear creep behavior observed in the same alloy irradiated in BR-10 was not observed in this study. Published by Elsevier B.V.
C1 [Li, Meimei; Hoelzer, D. T.; Rowcliffe, A. F.; Zinkle, S. J.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Grossbeck, M. L.] Univ Tennessee, Dept Nucl Engn, Knoxville, TN 37996 USA.
[Kurtz, R. J.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Li, MM (reprint author), Argonne Natl Lab, Nucl Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM mli@anl.gov
RI Hoelzer, David/L-1558-2016;
OI Zinkle, Steven/0000-0003-2890-6915
NR 26
TC 6
Z9 6
U1 2
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 618
EP 621
DI 10.1016/j.jnucmat.2008.12.220
PG 4
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900154
ER
PT J
AU Nozawa, T
Hinoki, T
Hasegawa, A
Kohyama, A
Katoh, Y
Snead, LL
Henager, CH
Hegeman, JBJ
AF Nozawa, T.
Hinoki, T.
Hasegawa, A.
Kohyama, A.
Katoh, Y.
Snead, L. L.
Henager, C. H., Jr.
Hegeman, J. B. J.
TI Recent advances and issues in development of silicon carbide composites
for fusion applications
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID DUAL-COOLANT BLANKET; SIC/SIC COMPOSITES; NEUTRON-IRRADIATION;
MECHANICAL-PROPERTIES; DISPLACEMENT-REACTIONS; SICF/SIC COMPOSITES;
SIC-COMPOSITES; TEMPERATURES; COATINGS; DESIGN
AB Radiation-resistant advanced silicon carbide (SiC/SiC) composites have been developed as a promising candidate of the high-temperature operating advanced fusion reactor. With the completion of the 'proof-of-principle' phase in development of 'nuclear-grade' SiC/SiC composites, the R&D on SiC/SiC composites is shifting toward the more pragmatic phase. i.e., industrialization of component manufactures and data-basing. In this paper, recent advances and issues in (1) development of component fabrication technology including joining and functional coating, e.g., a tungsten overcoat as a plasma facing barrier, (2) recent updates in characterization of non-irradiated properties, e.g., strength anisotropy and chemical compatibility with solid lithium-based ceramics and lead-lithium liquid metal breeders, and (3) irradiation effects are specifically reviewed. Importantly high-temperature neutron irradiation effects on microstructural evolution, thermal and electrical conductivities and mechanical properties including the fiber/matrix interfacial strength are specified under various irradiation conditions, indicating seemingly very minor influence on the composite performance in the design temperature range. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Nozawa, T.] Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan.
[Hinoki, T.; Kohyama, A.] Kyoto Univ, Inst Adv Energy, Kyoto 6110011, Japan.
[Hasegawa, A.] Tohoku Univ, Dept Quantum Sci & Energy Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan.
[Katoh, Y.; Snead, L. L.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Henager, C. H., Jr.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Hegeman, J. B. J.] NRG Petten, NL-1755 ZG Petten, Netherlands.
RP Nozawa, T (reprint author), Japan Atom Energy Agcy, 2-4 Shirakata Shirane, Tokai, Ibaraki 3191195, Japan.
EM nozawa.takashi67@jaea.gojp
OI Katoh, Yutai/0000-0001-9494-5862; Henager, Chuck/0000-0002-8600-6803
NR 49
TC 79
Z9 81
U1 8
U2 64
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 622
EP 627
DI 10.1016/j.jnucmat.2008.12.305
PG 6
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900155
ER
PT J
AU Katoh, Y
Kondo, S
Snead, LL
AF Katoh, Y.
Kondo, S.
Snead, L. L.
TI DC electrical conductivity of silicon carbide ceramics and composites
for flow channel insert applications
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID THERMAL-CONDUCTIVITY; RADIATION-DAMAGE; BLANKET CONCEPT; ISSUES;
RESISTIVITY; IRRADIATION; PARAMETERS; GRAPHITE; US
AB High purity chemically vapor-deposited silicon carbide (SiC) and 2D continuous SiC fiber, chemically vapor-infiltrated SiC matrix composites with pyrocarbon interphases were examined. Specifically, temperature dependent (RT to 800 degrees C) electrical conductivity and the influence of neutron irradiation were measured. The influence of neutron irradiation on electrical properties appeared very strong for the SiC of this study, typically resulting in orders lower ambient conductivity and steeper temperature dependency of this conductivity. For the 2D composites, through-thickness (normal to the fiber axis') electrical conductivity was dominated by bypass conduction via interphase network at relatively low temperatures, whereas conduction through SiC constituents dominated at higher temperatures. Through-thickness electrical conductivity of neutron-irradiated 2D SiC composites with thin PyC interphase, currently envisioned for flow channel insert application, will likely in the order of 10 S/m at the appropriate operating temperature. Mechanisms of electrical conduction in the composites and irradiation-induced modification of electrical conductivity of the composites and their constituents are discussed. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Katoh, Y.; Kondo, S.; Snead, L. L.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Katoh, Y (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
EM katohy@ornl.gov
OI Katoh, Yutai/0000-0001-9494-5862
NR 21
TC 28
Z9 29
U1 2
U2 15
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 639
EP 642
DI 10.1016/j.jnucmat.2008.12.237
PG 4
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900159
ER
PT J
AU Isobe, Y
Sagisaka, M
Garner, FA
Fujita, S
Okita, T
AF Isobe, Y.
Sagisaka, M.
Garner, F. A.
Fujita, S.
Okita, T.
TI Precipitate evolution in low-nickel austenitic stainless steels during
neutron irradiation at very low dose rates
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID MICROSTRUCTURAL EVOLUTION; BN-350 REACTOR; ALLOYS; DPA
AB Neutron-induced microstructural evolution in response to long term irradiation at very low dose rates was studied for a Russian low-nickel austenitic stainless steel designated X18H9 that is analogous to AISI 304. The irradiated samples were obtained from an out-of-core support column for the pressure vessel of the BN-600 fast reactor with doses ranging from 1.7 to 20.5 dpa generated at 3.8 x 10(-9) to 4.3 x 10(-8) dpa/s. The irradiation temperatures were in a very narrow range of 370-375 degrees C. Microstructural observation showed that in addition to voids and dislocations, an unexpectedly high density of small G-phase precipitates was formed that are not usually observed at higher dpa rates in this temperature range. A similar behavior was observed in a Western stainless steel, namely AISI 304 stainless steel, irradiated at similar temperatures and somewhat higher dpa rates in the EBR-II fast reactor, indicating that irradiation at low dpa rates for many years can lead to a different precipitate microstructure and therefore different associated changes in matrix composition than are generated at higher dpa rates. The contribution of such radiation-induced precipitation to changes in electrical resistivity was measured in the X18H9 specimens and was shown to cause significant deviation from predictions based only on void swelling. (c) 2009 Elsevier B.V. All rights reserved.
C1 [Isobe, Y.; Sagisaka, M.] Nucl Fuels Ltd, Osaka, Japan.
[Garner, F. A.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Fujita, S.; Okita, T.] Univ Tokyo, Tokyo, Japan.
RP Isobe, Y (reprint author), Nucl Fuels Ltd, Osaka, Japan.
EM isobe@nfi.co.jp
NR 23
TC 9
Z9 9
U1 1
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 661
EP 665
DI 10.1016/j.jnucmat.2008.12.255
PG 5
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900165
ER
PT J
AU Henager, CH
Kurtz, RJ
AF Henager, C. H., Jr.
Kurtz, R. J.
TI Compatibility of interfaces and fibers for SiC-composites in fusion
environments
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID WATER-VAPOR-PRESSURE; SUBCRITICAL CRACK-GROWTH; DEPENDENT FAILURE
MECHANISMS; SILICON-CARBIDE COMPOSITES; CERAMIC-MATRIX COMPOSITES;
HIGH-TEMPERATURE; ELEVATED-TEMPERATURES; SIC/SIC COMPOSITES; CVISICF/SIC
COMPOSITES; PARALINEAR OXIDATION
AB The use of SiC-composites in fusion environments is predicated on stability under neutron irradiation, on outstanding high-temperature mechanical properties, and on chemical inertness and corrosion resistance. However, SiC is susceptible to many forms of corrosion in water and in water vapor where silica formation is required as a protective layer because silica forms stable hydroxides that are volatile, even at low temperatures. SiC-composites have an additional concern that fine-grained fibers and weak interfaces provide the required fracture toughness, but these components may also exhibit susceptibility to corrosion that can compromise material properties. In this work we examine and review the compatibility of fibers and interfaces, as well as the SiC matrix. in proposed fusion environments including first wall, tritium breeding, and blanket modules and module coolants. (c) 2009 Elsevier B.V. All rights reserved.
C1 [Henager, C. H., Jr.; Kurtz, R. J.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Henager, CH (reprint author), Pacific NW Natl Lab, P8-15,902 Battelle Blvd, Richland, WA 99352 USA.
EM chuck.henager@pnl.gov
OI Henager, Chuck/0000-0002-8600-6803
NR 51
TC 2
Z9 2
U1 2
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 670
EP 674
DI 10.1016/j.jnucmat.2008.12.333
PG 5
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900167
ER
PT J
AU Pint, BA
Pawel, SJ
Howell, M
Moser, JL
Garner, GW
Santella, ML
Tortorelli, PF
Wiffen, FW
DiStefano, JR
AF Pint, B. A.
Pawel, S. J.
Howell, M.
Moser, J. L.
Garner, G. W.
Santella, M. L.
Tortorelli, P. F.
Wiffen, F. W.
DiStefano, J. R.
TI Initial characterization of V-4Cr-4Ti and MHD coatings exposed to
flowing Li
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID LIQUID-METAL BLANKETS; ELECTRICALLY INSULATING COATINGS; VANADIUM
ALLOYS; RECENT PROGRESS; FUSION-REACTOR; LITHIUM; COMPATIBILITY
AB A mono-metallic V-4Cr-4Ti thermal convection loop was operated in vacuum (similar to 10(-5) Pa) at a maximum Li temperature of 700 degrees C for 2355 h and Li flow rate of 2-3 cm/s. Two-layer, physical vapor deposited Y(2)O(3)-vanadium, electrically insulating coatings on V-4Cr-4Ti substrates as well as tensile and sheet specimens were located in the flow path in the hot and cold legs. After exposure, specimens at the top of the hot leg showed a maximum mass loss equivalent to similar to 1.3 mu m of metal loss. Elsewhere, small mass gains were observed on the majority of specimens resulting in an increase in hardness and room temperature yield stress and a decrease in ductility consistent with the observed uptake of N and C from the Li. Specimens that lost mass showed a decrease in yield stress and hardness. Profilometry showed no significant thickness loss from the coatings. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Pint, B. A.; Pawel, S. J.; Howell, M.; Moser, J. L.; Garner, G. W.; Santella, M. L.; Tortorelli, P. F.; Wiffen, F. W.; DiStefano, J. R.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Pint, BA (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, POB 2008, Oak Ridge, TN 37831 USA.
EM pintba@ornl.gov
RI Pint, Bruce/A-8435-2008; Tortorelli, Peter/E-2433-2011
OI Pint, Bruce/0000-0002-9165-3335;
NR 24
TC 8
Z9 8
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 712
EP 715
DI 10.1016/j.jnucmat.2008.12.295
PG 4
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900178
ER
PT J
AU Davis, JW
Fitzpatrick, BWN
Sharpe, JP
Haasz, AA
AF Davis, J. W.
Fitzpatrick, B. W. N.
Sharpe, J. P.
Haasz, A. A.
TI Thermo-oxidation of tokamak carbon dust
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID DIII-D; FUSION DEVICES; GRAPHITE; EROSION; REMOVAL; PLASMA; TILES
AB The oxidation of dust and flakes collected from the DIII-D tokamak, and various commercial dust specimens, has been measured at 350 degrees C and 2.0 kPa O(2) pressure. Following an initial small mass loss, most of the commercial dust specimens showed very little effect due to O(2) exposure. Similarly, dust collected from underneath DIII-D tiles, which is thought to comprise largely Grafoil (TM) particulates, also showed little susceptibility to oxidation at this temperature. However, oxidation of the dust collected from the surfaces has led to similar to 18% mass loss after 8 h: thereafter. little change in mass was observed. This suggests that the surface dust includes some components of different composition and/or structure - possibly fragments of codeposited layers. The oxidation of codeposit flakes scraped from DIII-D upper divertor tiles showed an initial 25% loss in mass due to heating in vacuum, and the gradual loss of 30-38% mass during the subsequent 24 h exposure to O(2). The oxidation of these flakes was much slower than that observed for the oxidation of thinner DIII-D codeposit specimens which were still adhered to the surfaces. This is thought to be related to structural differences. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Davis, J. W.; Fitzpatrick, B. W. N.; Haasz, A. A.] Univ Toronto, Inst Aerosp Studies, Toronto, ON M3H 5T6, Canada.
[Sharpe, J. P.] INL, Fus Safety Program, Idaho Falls, ID 83415 USA.
RP Davis, JW (reprint author), Univ Toronto, Inst Aerosp Studies, 4925 Dufferin St, Toronto, ON M3H 5T6, Canada.
EM jwdavis@starfire.utias.utoronto.ca
NR 16
TC 4
Z9 4
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 764
EP 767
DI 10.1016/j.jnucmat.2008.12.212
PG 4
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900191
ER
PT J
AU Grisolia, C
Rosanvallon, S
Sharpe, P
Winter, J
AF Grisolia, C.
Rosanvallon, S.
Sharpe, Ph.
Winter, J.
TI Micro-particles in ITER: A comprehensive review
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID DUST; TOKAMAKS; DIVERTOR; CARBON
AB In a fusion reactor like ITER, in-vessel materials are subjected to interactions with the plasma. One of the main consequences of these plasma-material interactions is the creation of co-deposited layers. Due to internal stresses, part of these layers can crack leading to micro particle creation. The purpose of the following paper is to review the Tokamak operation processes which lead to erosion and layer creation. Then, the proportion of these layers that is converted into micro-particles will be evaluated in the case of Tore Supra experiments and extrapolated for ITER. It is major importance to measure the ITER mobilizable dusts present in the Vacuum Vessel and compare the measured quantity with the safety limits. When approaching these limits, removal systems must be used in order to control the in-vessel dust inventory. In the second part of the paper, diagnostics and removal system under development will be presented. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Grisolia, C.; Rosanvallon, S.] CEA, EURATOM Assoc, DRFC SIPP, F-13108 St Paul Les Durance, France.
[Sharpe, Ph.] Idaho Natl Lab, Idaho Falls, ID USA.
[Winter, J.] Ruhr Univ Bochum, Inst Expt Phys 2, D-44780 Bochum, Germany.
RP Grisolia, C (reprint author), CEA, EURATOM Assoc, DRFC SIPP, F-13108 St Paul Les Durance, France.
EM Christian.grisolia@cea.fr
NR 14
TC 5
Z9 5
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 871
EP 873
DI 10.1016/j.jnucmat.2008.12.192
PG 3
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900218
ER
PT J
AU Calderoni, P
Sharpe, P
Nishimura, H
Terai, T
AF Calderoni, P.
Sharpe, P.
Nishimura, H.
Terai, T.
TI Control of molten salt corrosion of fusion structural materials by
metallic beryllium
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 13th International Conference on Fusion Reactor Materials (ICFRM-13)
CY DEC 10-14, 2007
CL Nice, FRANCE
ID ELEVATED-TEMPERATURE; NEUTRON-IRRADIATION; TRITIUM; FLIBE; REDOX;
CHEMISTRY; BREEDER; FLUORIDE
AB A series of tests have been performed between 2001 and 2006 at the Safety and Tritium Applied Research facility of the Idaho National Laboratory to demonstrate chemical compatibility between the molten salt flibe (2LiF + BeF(2) in moles) and fusion structural materials once suitable fluoride potential control methods are established. The tests adopted metallic beryllium contact as main fluoride potential control, and the results have been published in recent years. A further step was to expose two specimens of low activation ferritic/martensitic steel 9Cr-2W to static corrosion tests that include an active corrosion agent (hydrofluoric gas) in controlled conditions at 530 degrees C, and the results of the tests are presented in this paper. The results confirmed the expected correlation of the HF recovery with the concentration of metallic impurities dissolved in the salt because of specimen corrosion. The metals concentration dropped to levels close to the detectable limit when the beryllium rod was inserted and increased once the content of excess beryllium in the system had been consumed by HF reduction and specimen corrosion progressed. Metallographic analysis of the samples after 500 h exposure in reactive conditions showed evidence of the formation of unstable chromium oxide layers on the specimen's surface. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Calderoni, P.; Sharpe, P.] Idaho Natl Lab, Fus Safety Program, Idaho Falls, ID 83415 USA.
[Nishimura, H.] Univ Tokyo, Grad Sch Engn, Nucl Profess Sch, Tokyo, Japan.
[Terai, T.] Univ Tokyo, Grad Sch Engn, Dept Nucl Engn & Management, Tokyo, Japan.
RP Calderoni, P (reprint author), Idaho Natl Lab, Fus Safety Program, Idaho Falls, ID 83415 USA.
EM Pattrick.Calderoni@inl.gov
OI Calderoni, Pattrick/0000-0002-2316-6404
NR 15
TC 11
Z9 11
U1 5
U2 16
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 30
PY 2009
VL 386-88
BP 1102
EP 1106
DI 10.1016/j.jnucmat.2008.12.292
PG 5
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 450FR
UT WOS:000266386900276
ER
PT J
AU Zhou, J
Kostko, O
Nicolas, C
Tang, XN
Belau, L
de Vries, MS
Ahmed, M
AF Zhou, Jia
Kostko, Oleg
Nicolas, Christophe
Tang, Xiaonan
Belau, Leonid
de Vries, Mattanjah S.
Ahmed, Musahid
TI Experimental Observation of Guanine Tautomers with VUV Photoionization
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Letter
ID VACUUM-ULTRAVIOLET PHOTOIONIZATION; NUCLEIC-ACID BASES; GAS-PHASE;
AB-INITIO; IONIZATION-POTENTIALS; RARE TAUTOMERS; DNA BASES;
SYNCHROTRON-RADIATION; LASER SPECTROSCOPY; EXCITED-STATES
AB Two methods of preparing guanine in the gas phase, thermal vaporization and laser desorption, have been investigated. The guanine generated by each method is entrained in a molecular beam, single-photon ionized with tunable VUV synchrotron radiation, and analyzed using reflectron mass spectrometry. The recorded photoionization efficiency (PIE) curves show a dramatic difference for experiments performed via thermal vaporization compared to that with laser desorption. The calculated vertical and adiabatic ionization energies for the eight lowest-lying tautomers Of guanine suggest that the experimental observations arise from different tautomers being populated in the two different experimental methods.
C1 [Zhou, Jia; Kostko, Oleg; Nicolas, Christophe; Tang, Xiaonan; Belau, Leonid; Ahmed, Musahid] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
[de Vries, Mattanjah S.] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA.
RP Ahmed, M (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM MAhmed@lbl.gov
RI Ahmed, Musahid/A-8733-2009; Kostko, Oleg/B-3822-2009; Kostko,
Oleg/A-3693-2010
OI Kostko, Oleg/0000-0003-2068-4991;
NR 30
TC 25
Z9 25
U1 1
U2 15
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD APR 30
PY 2009
VL 113
IS 17
BP 4829
EP 4832
DI 10.1021/jp811107x
PG 4
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 438BB
UT WOS:000265529800001
PM 19344111
ER
PT J
AU Sivaramakrishnan, R
Michael, JV
AF Sivaramakrishnan, R.
Michael, J. V.
TI Rate Constants for OH with Selected Large Alkanes: Shock-Tube
Measurements and an Improved Group Scheme
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID HYDROGEN-ATOM ABSTRACTION; GAS-PHASE REACTIONS; TEMPERATURE RATE
CONSTANTS; TRANSITION-STATE THEORY; RELATIVE RATE CONSTANTS; HYDROXYL
RADICALS; RATE COEFFICIENTS; ORGANIC-COMPOUNDS; SMOG CHAMBER; N-NONANE
AB High-temperature rate constant experiments oil OH with the five large (C(5)-C(8)) saturated hydrocarbons n-heptane, 2,2,3,3-tetramethylbutane (2,2,33-TMB). n-pentane, n-hexane, and 2,3-dimethylbutane (2,3-DMB) were performed with the reflected-shock-tube technique using multipass absorption spectrometric detection of OH radicals at 308 nm. Single-point determinations at similar to 1200 K oil n-heptane, 2,2,3,3-TMB, n-hexane, and 2,3-DMB were previously reported by Cohen and co-workers; however, the present work Substantially extends the database to both lower and higher temperature. The present experiments span a wide temperature range, 789-1308 K, and represent the first direct measurements of rate constants at T > 800 K for n-pentane. The present work utilized 48 optical passes corresponding to a total path length of similar to 4.2 m. As a result of this increased path length, the high OH concentration detection sensitivity permitted pseudo-first-order analyses for unambiguously measuring rate constants. The experimental results can be expressed in Arrhenius form ill Units of cm(3) molecule(-1) s(-1) as follows:
k(OH+n-heptane) = (2.48 +/- 0.17) x 10(-10) exp[(-1927 +/- 69 K)/T] (838-1287 K)
k(OH+2,2,3,3-TMB) = (8.26 +/- 0.89) x 10(-11) exp[(-1337 +/- 94 K)/T] (789-1061 K)
k(OH+n-pentane) = (1.60 +/- 0.25) x 10(-10) (exp[(-1903 +/- 146 K)/T] (823-1308 K)
k(OH+n-hexane) = (2.79 +/- 0.39) x 10(-10) exp[(-2301 +/- 134 K)/T] (798-1299 K)
k(OH+2.3-DMB) =(1.27 +/- 0.16) x 10(-10) exp[(-1617 +/- 118 K)/T] (843-1292 K)
The available experimental data, along with lower-T determinations, were used to obtain evaluations of the expert mental rate constants over the temperature range from similar to 230 to 1300 K for most of the title reactions. These extended-telllperatUre-range evaluations, given as three-pararneter fits, are as follows:
k(OH+n-heptane) = 2.059 x 10(-15)T(1.401) exp(33 K/T) cm(3) molecule(-1) s(-1) (241-1287 K)
k(OH+2,2,3,3-TMB) = 6.835 x 10(-17)T(1.886) exp(-365 K/T) cm(3) molecule(-1) s(-1) (290-1180 K)
k(OH+n-pentane) = 2.495 x 10(-16)T(1.649) exp(80 K/T) cm(3) molecule(-1) s(-1) (224-1308 K)
k(OH+n-hexane) = 3.959 x 10(-18)T(2.218) exp(443 K/T) cm(3) molecule(-1) s(-1) (292-1299 K)
k(OH+2,3-DMB) = 2.287 x 10(-17T1.958) exp(365 K/T) cm(3) molecule(-1) s(-1) (220-1292 K)
The experimental data and the evaluations obtained for these five larger alkanes in the present work were used along with prior data/evaluations obtained in this laboratory for H abstractions by OH front a series of smaller alkanes (C(3)-C(5)) to devise rate rules for abstractions from various types of primary, secondary, and tertiary H atoms. Specifically, the current scheme was applied with good Success to H abstractions by OH from a series of n-alkanes (n-octane through n-hexadecane). The total rate constants using this group scheme for reactions of OH with selected large alkanes are given as three-parameter fits in this article. The rate constants for the various abstraction channels in any large n-alkane can also be obtained using the groups listed in this article. The present group scheme serves to reduce the uncertainties in rate constants for OH + alkane reactions.
C1 [Sivaramakrishnan, R.; Michael, J. V.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Michael, JV (reprint author), Argonne Natl Lab, Chem Sci & Engn Div, D-193,Bldg 200, Argonne, IL 60439 USA.
EM jmichael@anl.gov
RI SIVARAMAKRISHNAN, RAGHU/C-3481-2008; Michael, Joe/E-3907-2010
OI SIVARAMAKRISHNAN, RAGHU/0000-0002-1867-1254;
NR 69
TC 39
Z9 39
U1 5
U2 28
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD APR 30
PY 2009
VL 113
IS 17
BP 5047
EP 5060
DI 10.1021/jp810987u
PG 14
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 438BB
UT WOS:000265529800031
PM 19348456
ER
PT J
AU Mayhall, NJ
Raghavachari, K
Redfern, PC
Curtiss, LA
AF Mayhall, Nicholas J.
Raghavachari, Krishnan
Redfern, Paul C.
Curtiss, Larry A.
TI Investigation of Gaussian4 Theory for Transition Metal Thermochemistry
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID QUADRATIC CONFIGURATION-INTERACTION; GENERALIZED GRADIENT APPROXIMATION;
WASTE INCINERATION PROCESSES; DENSITY-FUNCTIONAL THEORIES; 3RD-ROW ATOMS
K; ELECTRONIC-STRUCTURE; MOLECULAR-ENERGIES; GAS-PHASE; VOLATILITY
CALCULATIONS; PROJECTION OPERATORS
AB An investigation of the performance of Gaussian-4 (G4) methods for the prediction of 3d transition metal thermochemistry is presented. Using the recently developed G3Large basis sets for atoms Se-Zn, the G4 and G4(MP2) methods with scalar relativistic effects included are evaluated on a test set of 20 enthalpies of formation of transition metal-containing molecules. The G4(MP2) method is found to perform significantly better than the G4 method. The G4 method fails due to the poor convergence of the Moller-Plesset perturbation theory at fourth-order in one case. The overall error for G4(MP2) of 2.84 kcal/mol is significantly larger than its previously reported performance for molecules containing main-group elements in the G3/05 test set. However, considering the relatively large uncertainties in the experimental enthalpies, the G4(MP2) method performs reasonably well. The performance of other composite methods based on G3 theory [G3(CCSD)//B3LYP and G3(MP2,CCSD)//B3LYP], as well as several density functional methods, are also presented in this paper. The results presented here will assist future development of composite model techniques suitable for use in transition metal-contain in-systems.
C1 [Mayhall, Nicholas J.; Raghavachari, Krishnan] Indiana Univ, Dept Chem, Bloomington, IN 47405 USA.
[Redfern, Paul C.; Curtiss, Larry A.] Argonne Natl Lab, Div Mat Sci, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
[Redfern, Paul C.; Curtiss, Larry A.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Raghavachari, K (reprint author), Indiana Univ, Dept Chem, Bloomington, IN 47405 USA.
EM kraghava@indiana.edu
NR 54
TC 39
Z9 39
U1 0
U2 11
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD APR 30
PY 2009
VL 113
IS 17
BP 5170
EP 5175
DI 10.1021/jp809179q
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 438BB
UT WOS:000265529800048
PM 19341257
ER
PT J
AU Shetty, AM
Wilkins, GMH
Nanda, J
Solomon, MJ
AF Shetty, Abhishek M.
Wilkins, Georgina M. H.
Nanda, Jagjit
Solomon, Michael J.
TI Multiangle Depolarized Dynamic Light Scattering of Short Functionalized
Single-Walled Carbon Nanotubes
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID ANGLE NEUTRON-SCATTERING; ROTATIONAL DIFFUSION; AQUEOUS DISPERSIONS;
SUSPENSIONS; LENGTH; RODS; NETWORKS; SENSORS; WATER; TRANSPARENT
AB We introduce the method of multiangle depolarized dynamic light scattering (MA-DDLS) to characterize the length and diameter of covalently functionalized single-walled carbon nanotubes (SWCNTs). MA-DDLS yields simultaneous characterization of the mean translational and rotational diffusivities of dilute solutions of SWCNTs. By using an anisotropic rigid rod model, we uniquely determine the length and diameter of the SWCNTs from the independent measurements of rotational and translational diffusion. The multiangle depolarized light scattering technique is found to be a fast, noninvasive, and reproducible method for identifying the average length and diameter of SWCNTs in solution.
C1 [Nanda, Jagjit] Mat & Nanotechnol Dept, Dearborn, MI USA.
[Shetty, Abhishek M.; Wilkins, Georgina M. H.; Solomon, Michael J.] Univ Michigan, Dept Chem Engn, Ann Arbor, MI 48109 USA.
RP Nanda, J (reprint author), Oak Ridge Natl Lab, MST Div, Oak Ridge, TN USA.
EM jagjitn@yahoo.com; mjsolo@umich.edu
OI Solomon, Michael/0000-0001-8312-257X
NR 55
TC 34
Z9 35
U1 5
U2 26
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD APR 30
PY 2009
VL 113
IS 17
BP 7129
EP 7133
DI 10.1021/jp900731q
PG 5
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 438BA
UT WOS:000265529700039
ER
PT J
AU Hyman, MP
Lebarbier, VM
Wang, Y
Datye, AK
Vohs, JA
AF Hyman, Matthew P.
Lebarbier, Vannesa M.
Wang, Yong
Datye, Abhaya K.
Vohs, John A.
TI A Comparison of the Reactivity of Pd Supported on ZnO(10(1)over-bar0)
and ZnO(0001)
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID SINGLE-CRYSTAL SURFACES; MODEL CATALYSTS; CO ADSORPTION; METHANOL
DECOMPOSITION; THERMAL-DESORPTION; PARTICLE-SIZE; FORMIC-ACID; ZNO;
HYDROGEN; PD(111)
AB The dependence of ZnO surface structure on Pd/ZnO-catalyzed methanol decomposition was investigated by using model catalysts consisting of Pd films and particles on ZnO(10 (1) over bar0) and ZnO(0001) single crystals. XPS Studies showed that vapor-deposited Pd grows two dimensionally at 300 K and agglomerates into particles upon heating. Temperature-programmed desorption (TPD) experiments showed that CO adsorption was weaker on Pd/ZnO(0001) relative to Pd/ZnO(1010) and that PdZn alloy formation was more facile on the ZnO(0001) compared to ZnO(10 (1) over bar0). Large differences in the amount of CO produced during methanol TPD on the Pd/ZnO(0001) and Pd/ZnO(10 (1) over bar0) samples were also observed and attributed to the presence of highly active sites at the Pd-ZnO(0001) interface. Comparisons to high surface area Pd/ZnO catalysts indicate that similar structural effects may also influence their reactivity.
C1 [Hyman, Matthew P.; Vohs, John A.] Univ Penn, Dept Chem & Biomol Engn, Philadelphia, PA 19104 USA.
[Lebarbier, Vannesa M.; Wang, Yong] Pacific NW Natl Lab, Richland, WA 99354 USA.
[Datye, Abhaya K.] Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA.
RP Vohs, JA (reprint author), Univ Penn, Dept Chem & Biomol Engn, Philadelphia, PA 19104 USA.
EM vohs@seas.upenn.edu
RI Wang, Yong/C-2344-2013;
OI Datye, Abhaya/0000-0002-7126-8659
FU U.S. Department of Energy [DE-FG02-04ER15605, DE-FG0205ER15712]
FX We gratefully acknowledge funding for this work provided by the U.S.
Department of Energy (grant nos. DE-FG02-04ER15605 (M.P.H., J.M.V.) and
DE-FG0205ER15712 (V.M.L., Y.W., A.K.D.)).
NR 55
TC 22
Z9 22
U1 4
U2 22
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD APR 30
PY 2009
VL 113
IS 17
BP 7251
EP 7259
DI 10.1021/jp809934f
PG 9
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 438BA
UT WOS:000265529700055
ER
PT J
AU Wang, XX
Schwartz, V
Clark, JC
Ma, XL
Overbury, SH
Xu, XC
Song, CS
AF Wang, Xiaoxing
Schwartz, Viviane
Clark, Jason C.
Ma, Xiaoliang
Overbury, Steven H.
Xu, Xiaochun
Song, Chunshan
TI Infrared Study of CO2 Sorption over "Molecular Basket" Sorbent
Consisting of Polyethylenimine-Modified Mesoporous Molecular Sieve
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID SOLID AMINE SORBENT; CARBON-DIOXIDE; GAS-MIXTURES; NATURAL-GAS;
FUNCTIONALIZED SBA-15; HIGH-TEMPERATURES; ACTIVATED CARBON; ADSORPTION;
CAPTURE; SEPARATION
AB An infrared study has been conducted on CO2 sorption into nanoporous CO2 "molecular basket" sorbents prepared by loading polyethylenimine (PEI) into mesoporous molecular sieve SBA-15. IR results from DRIFTS showed that a part of loaded PEI is anchored on the surface of SBA-15 through the interaction between amine groups and isolated surface silanol groups. Raising the temperature from 25 to 75 degrees C increased the molecular flexibility of PEI loaded in the mesopore channels, which may partly contribute to the increase of CO2 sorption capacity at higher temperatures. CO2 sorption/desorption behavior studied by in situ transmission FTIR showed that CO2 is sorbed on amine sites through the formation of alkylammonium carbamates and absorbed into the multiple layers of PEI located in mesopores of SBA-15. A new observation by in situ IR is that two broad IR bands emerged at 2450 and 2160 cm(-1) with CO2 flowing over PEI(50)/SBA-15, which could be attributed to chemically sorbed CO2 Species on PEI molecules inside the mesopores of SBA-15. The intensities of these two bands also increased with increasing CO, exposure time and with raising CO2 sorption temperature. By comparison of the CO2 sorption rate at 25 and 75 degrees C in terms of differential IR intensities, it was found that CO2 sorption over molecular basket sorbent includes two rate regimes which suggest two distinct steps: rapid sorption on exposed outer surface layers of PEI (controlled by sorption affinity or thermodynamics) and the diffusion and sorption inside the bulk of multiple layers of PEI (controlled by diffusion). The sorption Of CO2 is reversible at 75 degrees C. Comparative IR examination of the CO2 sorption/desorption spectra on dry and prewetted PEI/SBA-15 sorbent revealed that presorbed water does not significantly affect the CO2-amine interaction patterns.
C1 [Wang, Xiaoxing; Ma, Xiaoliang; Xu, Xiaochun; Song, Chunshan] Penn State Univ, EMS Energy Inst, Clean Fuels & Catalysis Program, University Pk, PA 16802 USA.
[Wang, Xiaoxing; Ma, Xiaoliang; Xu, Xiaochun; Song, Chunshan] Penn State Univ, Dept Energy & Mineral Engn, University Pk, PA 16802 USA.
[Schwartz, Viviane; Clark, Jason C.; Overbury, Steven H.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Song, CS (reprint author), Penn State Univ, EMS Energy Inst, Clean Fuels & Catalysis Program, 209 Acad Projects Bldg, University Pk, PA 16802 USA.
EM csong@psu.edu
RI Song, Chunshan/B-3524-2008; Wang, Xiaoxing/A-5365-2010; Overbury,
Steven/C-5108-2016
OI Song, Chunshan/0000-0003-2344-9911; Wang, Xiaoxing/0000-0002-1561-3016;
Overbury, Steven/0000-0002-5137-3961
FU Pennsylvania Energy Development Authority; PA Department of
Environmental Protection; US Office of Naval Research; U.S. Department
of Energy
FX The present research is supported in part by the Pennsylvania Energy
Development Authority through PA Department of Environmental Protection
and by the US Office of Naval Research based on our earlier study funded
by US Department of Energy through National Energy Technology
Laboratory. The in situ transmission FTIR study at Oak Ridge National
Laboratory's Center for Nanophase Materials Sciences was sponsored by
the Scientific User Facilities Division, Office of Basic Energy
Sciences, U.S. Department of Energy. The authors wish to thank all of
the above government agencies.
NR 61
TC 181
Z9 189
U1 11
U2 101
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD APR 30
PY 2009
VL 113
IS 17
BP 7260
EP 7268
DI 10.1021/jp809946y
PG 9
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 438BA
UT WOS:000265529700056
ER
PT J
AU Zorn, DD
Albao, MA
Evans, JW
Gordon, MS
AF Zorn, Deborah D.
Albao, Marvin A.
Evans, J. W.
Gordon, Mark S.
TI Binding and Diffusion of Al Adatoms and Dimers on the Si(100)-2 x 1
Reconstructed Surface: A Hybrid QM/MM Embedded Cluster Study
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID MM3 FORCE-FIELD; SCANNING-TUNNELING-MICROSCOPY; SELF-CONSISTENT-FIELD;
LOW-COVERAGE PHASES; AB-INITIO CLUSTER; MOLECULAR-MECHANICS;
CYCLOADDITION REACTIONS; ENERGY MINIMIZATION; SI(001) SURFACE;
ADSORPTION
AB When group III metals are deposited onto the Si(100)-2 x 1 reconstructed surface they are observed to self-assemble into chains of atoms that are one atom high by one atom wide. To better understand this one-dimensional island growth, ab initio electronic structure calculations on the structures of Al atoms on silicon clusters have been performed. Natural orbital occupation numbers show that these systems display significant diradical character, suggesting that a multireference method is needed. A multiconfiguration self-consistent field (MCSCF) calculation with a 6-31G(d) basis set and effective core potentials was used to optimize geometries. The surface integrated molecular orbital molecular mechanics embedded cluster method was used to take the surface chemistry into account, as well as the structure of an extended surface region. Potential energy surfaces for binding of Al adatoms and At-Al dimers on the surface were determined, and the former was used to obtain a preliminary assessment of the surface diffusion of adatoms. Hessians were calculated to characterize stationary points, and improved treatment of dynamic electron correlation was accomplished using multireference second order perturbation theory (MRMP2) single-point energy calculations. Results from the MRMP2//MCSCF embedded cluster calculations are compared with those from QM-only cluster calculations, embedded cluster unrestricted density functional theory calculations, and previous Car-Parrinello DFT studies.
C1 [Zorn, Deborah D.; Gordon, Mark S.] US DOE, Ames Lab, Ames, IA 50011 USA.
[Zorn, Deborah D.; Gordon, Mark S.] Iowa State Univ, Dept Chem, Ames, IA 50011 USA.
[Albao, Marvin A.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Evans, J. W.] Iowa State Univ, Dept Math, Ames, IA 50011 USA.
RP Gordon, MS (reprint author), US DOE, Ames Lab, Ames, IA 50011 USA.
EM mark@si.msg.chem.iastate.edu
FU SciDAC; Chemical Physics Computational Chemistry Programs; Division of
Chemical Sciences, Basic Energy Sciences, U.S. Department of Energy
(USDOE) [DE-AC02-07CH11358]
FX This work was supported by the SciDAC and Chemical Physics Computational
Chemistry Programs and Division of Chemical Sciences, Basic Energy
Sciences, U.S. Department of Energy (USDOE). The work was performed at
Ames Laboratory, which is operated for the USDOE by Iowa State
University under Contract no. DE-AC02-07CH11358. The authors also
acknowledge Drs. Mike Schmidt and Jamie Rintelman and Professors Cheol
Ho Choi and Tim Dudley for many helpful discussions.
NR 57
TC 14
Z9 14
U1 2
U2 10
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD APR 30
PY 2009
VL 113
IS 17
BP 7277
EP 7289
DI 10.1021/jp8105937
PG 13
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 438BA
UT WOS:000265529700058
ER
PT J
AU Kim, DH
Szanyi, J
Kwak, JH
Wang, XQ
Hanson, JC
Engelhard, M
Peden, CHF
AF Kim, Do Heui
Szanyi, Janos
Kwak, Ja Hun
Wang, Xianqin
Hanson, Jonathan C.
Engelhard, Mark
Peden, Charles H. F.
TI Effects of Sulfation Level on the Desulfation Behavior of Presulfated
Pt-BaO/Al2O3 Lean NOx Trap Catalysts: A Combined H-2
Temperature-Programmed Reaction, in Situ Sulfur K-Edge X-ray Absorption
Near-Edge Spectroscopy, X-ray Photoelectron Spectroscopy, and
Time-Resolved X-ray Diffraction Study
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID REDUCTION CATALYST; STORAGE-REDUCTION; REGENERATION; XANES; MECHANISM;
BAO/AL2O3; XAFS; BAO
AB Desulfation by hydrogen of presulfated Pt (2 wt %)-BaO(20 wt %)/Al2O3 with various sulfur loading (S/Ba = 0. 12, 0.3 1, and 0.62) were investigated by combining H-2 temperature programmed reaction (TPRX), X-ray photoelectron spectroscopy (XPS), in situ sulfur K-edge X-ray absorption near-edge spectroscopy (XANES), and synchrotron time-resolved X-ray diffraction (TRARD) techniques. We find that the amount of HS desorbed during the desulfation in the H-2 TPRX experiments is not proportional to the amount of initial sulfur loading. The results of both in situ sulfur K-edge XANES and TR-XRD show that at low sulfur loadings, sulfates were transformed to a BaS phase and remained in the catalyst rather than being removed as H2S. On the other hand, when the deposited sulfur level exceeded a certain threshold (at least S/Ba = 0.31) sulfates were reduced to form H2S, and the relative amount of the residual sulfide species in the catalyst was much less than at low sulfur loading. Unlike samples with high sulfur loading (e.g., S/Ba = 0.62), H2O did not promote the desulfation for the sample with S/Ba of 0.12, implying that the formed BaS species originating from the reduction of sulfates at low sulfur loading are more stable to hydrolysis. The results of this combined spectroscopy investigation provide clear evidence to show that sulfates at low sulfur loadings are less likely to be removed as H2S and have a greater tendency to be transformed to BaS on the material, leading to the conclusion that desulfation behavior of Pt-BaO/Al2O3 lean NOx trap catalysts is markedly dependent on the sulfation levels.
C1 [Kim, Do Heui; Szanyi, Janos; Kwak, Ja Hun; Engelhard, Mark; Peden, Charles H. F.] Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99354 USA.
[Wang, Xianqin] New Jersey Inst Technol, Dept Chem Biol & Pharmaceut Engn, Newark, NJ 07102 USA.
[Hanson, Jonathan C.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
RP Kim, DH (reprint author), Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99354 USA.
EM do.kim@pnl.gov
RI Engelhard, Mark/F-1317-2010; Kwak, Ja Hun/J-4894-2014; Kim, Do
Heui/I-3727-2015; Hanson, jonathan/E-3517-2010
FU U.S. Department of Energy (DOE); Office of Science/Basic Energy Sciences
[DE-AC02-98CH10886]; U.S. DOE, Office of Energy Efficiency and Renewable
Energy/Vehicle Technologies Program; Battelle Memorial Institute
[DE-AC06-76RLO 1830]; U.S. DOE, Office of Science/Basic Energy Sciences,
Division of Chemical Sciences [DE-AC02-98CH10086]
FX The authors would like to thank Dr. Wen Wen, Dr. Khalid Syed, and
Nebojsa Marinkovic at the National Synchrotron Light Source (NSLS) for
help with the TR-XRD and sulfur K-edge XANES spectroscopy measurements.
Use of the NSLS at Brookhaven National Laboratory (BNL), was supported
by the U.S. Department of Energy (DOE), Office of Science/Basic Energy
Sciences, under Contract No. DE-AC02-98CH10886. The authors also give
thanks to Dr. Simon Bare (UOP) for help with the design of our in situ S
XANES reactor. Financial support was provided by the U.S. DOE, Office of
Energy Efficiency and Renewable Energy/Vehicle Technologies Program.
Many of the experiments were performed in the Environmental Molecular
Sciences Laboratory (EMSL) at Pacific Northwest National Laboratory
(PNNL). The EMSL is a national scientific user facility supported by the
U.S. DOE, Office of Science/Biological and Environmental Research. PNNL
is a multiprogram national laboratory operated for the U.S. DOE by
Battelle Memorial Institute under Contract DE-AC06-76RLO 1830. J.C.H.
was supported through Contract DE-AC02-98CH10086 with the U.S. DOE,
Office of Science/Basic Energy Sciences, Division of Chemical Sciences.
NR 24
TC 15
Z9 15
U1 1
U2 15
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD APR 30
PY 2009
VL 113
IS 17
BP 7336
EP 7341
DI 10.1021/jp900304h
PG 6
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 438BA
UT WOS:000265529700065
ER
PT J
AU Starr, DE
Weis, C
Yamamoto, S
Nilsson, A
Bluhm, H
AF Starr, David E.
Weis, Christoph
Yamamoto, Susumu
Nilsson, Anders
Bluhm, Hendrik
TI NO2 Adsorption on Ag(100) Supported MgO(100) Thin Films: Controlling the
Adsorption State with Film Thickness
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID ULTRATHIN OXIDE-FILMS; LEAN-BURN ENGINE; METAL; CHEMISTRY; MGO;
PHOTOEMISSION; SPECTROSCOPY; INTERFACES; SURFACES; CATALYST
AB Using photoemission and X-ray absorption spectroscopy, we compare the adsorption properties of NO2 at 300 K on MgO(100)/Ag(100) films with thicknesses varying from 2 to 8 ML and NO2 exposures ranging from 0 L to over 25 000 L. We find that NO2 is stable on 2 ML MgO(100) films, where it is the most abundant adsorbate on the surface (similar to 0.35 ML) for exposures up to at least similar to 25 000 L. At high exposures, NO3 also forms on the surface of 2 ML thick films but is a minority species. In contrast, films thicker than similar to 5 ML show conversion to NO3 beginning already at low exposures. At high exposure to NO2, NO3 is the only species present on the surface. Shifts to lower binding energy of the O 1s spectra with adsorbed species indicate that the NO2 adsorbed on the thin MgO(100) films is likely negatively charged and forms NO2-. A more gradual binding energy shift is observed on thicker films and is likely associated with the slower formation of NO3- Measurements on MgO(1.00) films of various thicknesses indicate that for films thicker than 5 ML, the NO2 adsorption properties are similar and most likely correspond to surfaces of bulk MgO(100). We discuss potential mechanisms for NO2 charging and stabilization on the thin MgO(100) films in the context of recent literature.
C1 [Starr, David E.; Bluhm, Hendrik] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
[Weis, Christoph] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Nilsson, Anders] Stockholm Univ, Albanova Univ Ctr, SE-10691 Stockholm, Sweden.
Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
RP Bluhm, H (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
EM hbluhm@lbl.gov
RI Yamamoto, Susumu/C-1584-2008; Nilsson, Anders/E-1943-2011
OI Yamamoto, Susumu/0000-0002-6116-7993; Nilsson,
Anders/0000-0003-1968-8696
FU Office of Science, Biological and Environmental Research, Environmental
Remediation Sciences Division (ERSD); U.S. Department of Energy
[DE-AC02-05CH11231]; National Science Foundation [CHE-0431425]
FX We thank Thomas Risse and Martin Sterrer of the Fritz Haber Institute,
Berlin, as well as Miquel Salmeron of Lawrence Berkeley National
Laboratory (LBNL) for helpful and insightful discussions. Ed Wong and
Tolek Tyliszczak (both LBNL) are acknowledged for their continued
support at the beamline. This work was supported by the Office of
Science, Biological and Environmental Research, Environmental
Remediation Sciences Division (ERSD), U.S. Department of Energy under
Contract no. DE-AC02-05CH11231 and by the National Science Foundation
under Contract no. CHE-0431425 (Stanford Environmental Molecular Science
Institute).
NR 39
TC 22
Z9 22
U1 2
U2 12
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD APR 30
PY 2009
VL 113
IS 17
BP 7355
EP 7363
DI 10.1021/jp900410v
PG 9
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 438BA
UT WOS:000265529700067
ER
PT J
AU Rodriguez, JA
Evans, J
Graciani, J
Park, JB
Liu, P
Hrbek, J
Sanz, JF
AF Rodriguez, Jose A.
Evans, Jaime
Graciani, Jesus
Park, Joon-Bum
Liu, Ping
Hrbek, Jan
Fdez Sanz, Javier
TI High Water-Gas Shift Activity in TiO2(110) Supported Cu and Au
Nanoparticles: Role of the Oxide and Metal Particle Size
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; GOLD NANOPARTICLES;
TITANIUM-DIOXIDE; CO OXIDATION; CATALYSTS; SURFACE; DENSITY; MECHANISM;
SO2
AB The deposition of Cu and Au nanoparticles on TiO2(110) produces very good catalysts for the WGS. Although bulk metallic gold is not active as a WGS catalyst, Au nanoparticles supported on TiO2 (110) have an activity comparable to that of Cu/ZnO(000 (1) over bar). Cu/TiO2(110) is clearly a better catalyst than Cu/ZnO(000 (1) over bar) or Au/TiO2(110). The catalysts that have the highest activity for the WGS have also the lowest apparent activation energy. On Cu(111) and Cu(100), the aparent activation energies are 18.1 and 15.2 kcal/mol, respectively. The apparent activation energy decreases to 12.4 kcal/mol on Cu/ZnO(000 (1) over bar), 10.2 on Au/TiO2 (110), and 8.3 kcal/mol on Cu/TiO2(110). The Cu <-> titania interactions are substantially stronger than the Au <-> titania interactions. This has an effect on the growth mode of the metals on TiO2(110). In images of scanning tunneling miscroscopy, the average particle size in Cu/TiO2(110) is smaller than that in Au/TiO2(110). The Cu particles are dispersed on the terraces and steps of the oxide surface, whereas the Au particles concentrate on the steps. The morphology of Cu/TiO2(110) favors high catalytic activity. The results of density functional calculations indicate that the metal-oxide interface plays an essential role in the catalysis, helping in the dissociation of water and in the formation of an OCOH intermediate, which decomposes to yield CO2 and hydrogen.
C1 [Rodriguez, Jose A.; Graciani, Jesus; Park, Joon-Bum; Liu, Ping; Hrbek, Jan] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
[Evans, Jaime] Cent Univ Venezuela, Fac Ciencias, Caracas 1020A, Venezuela.
[Graciani, Jesus; Fdez Sanz, Javier] Univ Seville, Fac Quim, Dept Quim Fis, E-41012 Seville, Spain.
RP Rodriguez, JA (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
RI Graciani, Jesus/B-1136-2009; Hrbek, Jan/I-1020-2013
FU Ministerio de Educacion y Ciencia, MEC, from Spain [MAT200804918]; Junta
de Andalucia [FQM-132]; U.S. Department of Energy, Division of Chemical
Sciences [DE-AC02-98CH10886]
FX This work was funded by the Ministerio de Educacion y Ciencia, MEC, from
Spain (project MAT200804918), and the Junta de Andalucia (project
FQM-132). We also thank the computational resources provided by the
Barcelona Supercomputing Center - Centro Nacional de Supercomputacion
(Spain) and the computing facilities at the Center for Functional
Nanomaterials of Brookhaven National Laboratory. The work done at
Brookhaven National Laboratory was supported by the U.S. Department of
Energy, Division of Chemical Sciences (DE-AC02-98CH10886). J.E. thanks
INTEVEP for a travel grant that made possible a part of this project.
NR 44
TC 135
Z9 135
U1 12
U2 118
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD APR 30
PY 2009
VL 113
IS 17
BP 7364
EP 7370
DI 10.1021/jp900483u
PG 7
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 438BA
UT WOS:000265529700068
ER
PT J
AU Lee, S
Noh, JH
Bae, ST
Cho, IS
Kim, JY
Shin, H
Lee, JK
Jung, HS
Hong, KS
AF Lee, Sangwook
Noh, Jun Hong
Bae, Shin-Tae
Cho, In-Sun
Kim, Jin Young
Shin, Hyunho
Lee, Jung-Kun
Jung, Hyun Suk
Hong, Kug Sun
TI Indium-Tin-Oxide-Based Transparent Conducting Layers for Highly
Efficient Photovoltaic Devices
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID SENSITIZED SOLAR-CELLS; ELECTRICAL-PROPERTIES; THIN-FILMS; ELECTRODE;
PHOTOCURRENT; PERFORMANCE; CIRCUIT; LIGHT; PHOTOCATALYSIS; NANOPARTICLES
AB Additional hydrogen (H(2)) annealing and subsequent electrochemical treatment are found to make tin-doped indium oxide (ITO)-based photoelectrodes suitable for highly efficient dye sensitized solar cells. The additional H(2) annealing process recovered the electrical conductivity of the ITO film the same as its initial high conductivity, which enhanced the charge collecting property. Moreover, the employment of electrochemical oxidation of TiO(2)/ITO photoelectrode improved the energy conversion efficiency of the ITO-based dye-sensitized solar cells (DSSC), higher than that of a conventional FTO-based DSSC. Electrochemical impedance analysis showed that the H(2) annealing process reduced the internal resistance of the cell, i.e., the resistance of the ITO and the Schottky barrier at the TiO(2)/ITO interface were reduced, and that the electrochemical treatment recovered the diodelike characteristics of the DSSC by retarding back electron transfer from the photoelectrode to the electrolyte. The present work demonstrates that thermally and electrochemically modified ITO-based photoelectrode is another alternative to the conventionally used FTO-based photoelectrode.
C1 [Jung, Hyun Suk] Kookmin Univ, Sch Adv Mat Engn, Seoul 136702, South Korea.
[Lee, Sangwook; Noh, Jun Hong; Bae, Shin-Tae; Cho, In-Sun; Hong, Kug Sun] Seoul Natl Univ, Sch Mat Sci & Engn, Seoul 151744, South Korea.
[Kim, Jin Young] Chem & Biosci Ctr, Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Shin, Hyunho] Kangnung Natl Univ, Dept Ceram Engn, Kangnung 210702, South Korea.
[Lee, Jung-Kun] Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15260 USA.
RP Jung, HS (reprint author), Kookmin Univ, Sch Adv Mat Engn, Jeongneung Dong, Seoul 136702, South Korea.
EM hjung@kookmin.ac.kr; kshongss@plaza.snu.ac.kr
RI Jung, Hyun Suk/D-4745-2011; Kim, Jin Young/B-7077-2012; Cho, In
Sun/H-6557-2011; Lee, Sangwook/O-9166-2015; Jung, Hyun Suk/H-3659-2015;
OI Kim, Jin Young/0000-0001-7728-3182; Lee, Sangwook/0000-0002-3535-0241;
Jung, Hyun Suk/0000-0002-7803-6930
FU Korea government (MOST) [R01-2007-000-11075-0]; Korean Government
(MOEHRD) [KRF-2007-313-D00345]; ERC Program (CMPS, Center for Materials
and Processes of Self-Assembly) of MOST/KOSEF [R11-2005-048-00000-0];
Seoul RBD program [CR070027C092852]; Kookmin University
FX This work was supported by the Korea Science and Engineering Foundation
(KOSEF) grant funded by the Korea government (MOST)
(R01-2007-000-11075-0) (RIAM). The portion of Kookmin University was
supported by the Korea Research Foundation Grant funded by the Korean
Government (MOEHRD) (KRF-2007-313-D00345), and the ERC Program (CMPS,
Center for Materials and Processes of Self-Assembly) of MOST/KOSEF
(R11-2005-048-00000-0). This work was also supported by the Seoul R&BD
program (CR070027C092852) and the research program 2008 of Kookmin
University.
NR 38
TC 23
Z9 23
U1 1
U2 11
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD APR 30
PY 2009
VL 113
IS 17
BP 7443
EP 7447
DI 10.1021/jp809011a
PG 5
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 438BA
UT WOS:000265529700079
ER
PT J
AU Hu, MZ
Easterly, CE
AF Hu, Michael Z.
Easterly, Clay E.
TI A novel thermal electrochemical synthesis method for production of
stable colloids of "naked" metal (Ag) nanocrystals
SO MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS
LA English
DT Article
DE Nanocrystals; Metallic nanoparticles; Solution synthesis; Silver;
Electrochemical
ID MONODISPERSE SILVER NANOPARTICLES; CHEMICAL-REDUCTION METHOD;
SELF-ORGANIZATION; PHOTOCHEMICAL REDUCTION; ANTIMICROBIAL ACTIVITY;
PHYSICAL-PROPERTIES; OPTICAL-PROPERTIES; PARTICLES; SIZE; MICROEMULSIONS
AB This paper describes a novel thermal electrochemical synthesis (TECS) method for producing aqueous solutions (or sols) that contain metal silver nanocrystals as small as a few nanometers. The TECS method requires mild conditions (25 to 100 degrees C, low voltage (I to 50 V DC) on silver electrodes, and water or simple aqueous solutions as the reaction medium. Furthermore, a tubular dialysis membrane that surrounds the electrodes provides favorable conditions for producing nanosized (less than 10 nm) silver nanocrystals. Unlike nanocrystals reported in the literature, our nanocrystals have several unique features: (1) small nanometer-scale size, (2) "nakedness" (i.e., surfaces of metal nanocrystals are free of organic ligands or capping molecules and need no dispersant in synthesis solutions), and (3) colloidal stability in water solutions. It was discovered that silver nanoparticles with initially large size distribution can be homogenized into near-monodispersed colloidal sol by a low-power (less than 15 mW) He-Ne laser exposure treatment. The combination of the TECS technique and the laser treatment could lead to a new technology that produces metal nanoparticles that are naked, colloidally stable, and uniformly sized. In the presence of a stabilizing agent (also a supporting electrolyte) such as polyvinyl alcohol, high yields of silver nanoparticles (less than 100 nm) in the form of thick milky sols are produced. (C) 2009 Published by Elsevier B.V.
C1 [Hu, Michael Z.] Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA.
[Easterly, Clay E.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Hu, MZ (reprint author), Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA.
EM hum1@ornl.gov
OI Hu, Michael/0000-0001-8461-9684
FU U.S. Department of Energy
FX We would like to thank Oak Ridge National Laboratory (ORNL) for its
financial sponsorship through the Laboratory Directed Research and
Development seed money fund and partial funding support from the U.S.
Department of Energy Basic Energy Sciences materials chemistry program.
We would also like to express our thanks to Cameron Ericson, an intern
student from Lawrence University (Appleton, Wisconsin) for some
experimental runs. We are also grateful to Lawrence F. Allard Jr. at the
ORNL High Temperature Materials Laboratory for its help with electronic
microscopy.
NR 48
TC 10
Z9 11
U1 2
U2 21
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0928-4931
J9 MAT SCI ENG C-BIO S
JI Mater. Sci. Eng. C-Biomimetic Supramol. Syst.
PD APR 30
PY 2009
VL 29
IS 3
BP 726
EP 736
DI 10.1016/j.msec.2009.01.018
PG 11
WC Materials Science, Multidisciplinary
SC Materials Science
GA 452DP
UT WOS:000266520400013
ER
PT J
AU Pastore, S
Schiavilla, R
Goity, JL
AF Pastore, S.
Schiavilla, R.
Goity, J. L.
TI ELECTROMAGNETIC PROCESSES IN chi EFT
SO MODERN PHYSICS LETTERS A
LA English
DT Article
ID THERMAL-NEUTRON CAPTURE; NUCLEAR-FORCES; LAGRANGIANS; DEUTERIUM;
CURRENTS
AB Nuclear electromagnetic currents derived in a chiral-effective-field-theory frame work including explicit nucleons, Delta isobars, and pions upto N(2)LO, i.e. ignoring loop corrections, are used in a study of neutron radiative captures on proton sand deuterons at thermal energies, and of A=2 and 3 nuclei magnetic moments. With the strengths of the Delta-excitation currents determined to reproduce the n-p cross section and isovector combination of the trinucleon magnetic moments, we find that the crosssection and photon circular polarization parameter, measured respectively in n-d and (n) over right arrown-d processes, are significantly under predicted by theory.
C1 [Pastore, S.; Schiavilla, R.] Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
[Schiavilla, R.; Goity, J. L.] Jefferson Lab, Ctr Theory, Newport News, VA 23606 USA.
[Goity, J. L.] Hampton Univ, Dept Phys, Hampton, VA 23668 USA.
RP Pastore, S (reprint author), Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
EM pastore@jlab.org; schiavil@jlab.org; goity@jlab.org
FU U.S. Department of Energy, Office of Nuclear Physics
[DE-AC05-06OR23177]; NSF [PHY-0555559]; National Energy Research
Supercomputer Center
FX We would like to thank E. Epelbaum, L.Girlanda, A. Kievsky, L.E.
Marcucci, and M.Viviani for discussions. The work of R.S. is supported
by the U.S. Department of Energy, Office of Nuclear Physics, under
contract DE-AC05-06OR23177, while that of J.L.G. by NSF grant
PHY-0555559. The calculations were made possible by grants of computing
time from the National Energy Research Supercomputer Center.
NR 19
TC 1
Z9 1
U1 0
U2 0
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0217-7323
J9 MOD PHYS LETT A
JI Mod. Phys. Lett. A
PD APR 30
PY 2009
VL 24
IS 11-13
BP 931
EP 936
PG 6
WC Physics, Nuclear; Physics, Particles & Fields; Physics, Mathematical
SC Physics
GA 445GU
UT WOS:000266039300031
ER
PT J
AU Loiseau, B
El-Bennich, B
Furman, A
Kaminski, R
Lesniak, L
Moussallam, B
AF Loiseau, B.
El-Bennich, B.
Furman, A.
Kaminski, R.
Lesniak, L.
Moussallam, B.
TI pi K INTERACTION EFFECTS ON CP VIOLATION IN B -> K pi(+) pi(-) DECAYS
SO MODERN PHYSICS LETTERS A
LA English
DT Article
DE B decays and QCD factorization; strange pi K form factors; CP violation
AB We apply QCD factorization to the quasi two-body B -> (K pi)pi decays where the (K pi)(-) pair effective mass is limited to 1.8 GeV. Our strong interaction phases constrained by theory and pi K experimental data yield useful information for studies of CP violation.
C1 [Loiseau, B.] Univ Paris 06, LPNHE, IN2P3, CNRS,Grp Theorie, F-75252 Paris, France.
[El-Bennich, B.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
[Kaminski, R.; Lesniak, L.] Henryk Niewodniczanski Inst Nucl Phys, Div Theoret Phys, PL-31342 Krakow, Poland.
[Moussallam, B.] Univ Paris 11, Inst Phys Nucl, CNRS, F-91406 Orsay, France.
[Loiseau, B.] Univ Paris 07, F-75252 Paris, France.
RP Loiseau, B (reprint author), Univ Paris 06, LPNHE, IN2P3, CNRS,Grp Theorie, 4 Pl Jussieu, F-75252 Paris, France.
EM loiseau@lpnhe.in2p3.fr
FU IN2P3 and Polish Laboratories [08-127]; PAN and CNRS [19481]; Department
of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]
FX We acknowledge helpful comments from J-P. Dedonder and O.Leitner. This
work was supported by the agreements between IN2P3 and Polish
Laboratories (collaboration N degrees 08-127), between PAN and CNRS
(collaboration N degrees 19481) and by the Department of Energy, Office
of Nuclear Physics, contract No. DE-AC02-06CH11357.
NR 9
TC 0
Z9 0
U1 0
U2 1
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0217-7323
J9 MOD PHYS LETT A
JI Mod. Phys. Lett. A
PD APR 30
PY 2009
VL 24
IS 11-13
BP 960
EP 963
PG 4
WC Physics, Nuclear; Physics, Particles & Fields; Physics, Mathematical
SC Physics
GA 445GU
UT WOS:000266039300037
ER
PT J
AU Sego, LH
Reynolds, MR
Woodall, WH
AF Sego, Landon H.
Reynolds, Marion R., Jr.
Woodall, William H.
TI Risk-adjusted monitoring of survival times
SO STATISTICS IN MEDICINE
LA English
DT Article
DE control chart; CUSUM; monitoring; risk adjustment; survival time
ID OUTCOMES; CUSUM; PERFORMANCE; SCHEMES; CHARTS
AB We consider the monitoring of surgical outcomes, where each patient has a different risk of post-operative mortality due to risk factors that exist prior to the surgery. We propose a risk-adjusted (RA) survival time CUSUM chart (RAST CUSUM) for monitoring a continuous, time-to-event variable that may be right-censored. Risk adjustment is accomplished using accelerated failure time regression models. We compare the average run length performance of the RAST CUSUM chart with the RA Bernoulli CUSUM chart using data from cardiac surgeries to motivate the details of the comparison. The comparisons show that the RAST CUSUM chart is more efficient at detecting a sudden increase in the odds of mortality than the RA Bernoulli CUSUM chart, especially when the fraction of censored observations is relatively low or when a small increase in the odds of mortality occurs. We also discuss the impact of the amount of training data used to estimate chart parameters as well as the implementation of the RAST CUSUM chart during prospective monitoring. Copyright (C) 2009 John Wiley & Sons, Ltd.
C1 [Sego, Landon H.] Pacific NW Natl Lab, Stat & Sensor Analyt Grp, Richland, WA 99352 USA.
[Reynolds, Marion R., Jr.; Woodall, William H.] Virginia Polytech Inst & State Univ, Dept Stat, Richland, WA USA.
[Reynolds, Marion R., Jr.] Virginia Polytech Inst & State Univ, Dept Forestry, Richland, WA USA.
RP Sego, LH (reprint author), POB 999,MS K6-08, Richland, WA 99352 USA.
EM Landon.Sego@pnl.gov
NR 23
TC 25
Z9 25
U1 0
U2 4
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0277-6715
EI 1097-0258
J9 STAT MED
JI Stat. Med.
PD APR 30
PY 2009
VL 28
IS 9
BP 1386
EP 1401
DI 10.1002/sim.3546
PG 16
WC Mathematical & Computational Biology; Public, Environmental &
Occupational Health; Medical Informatics; Medicine, Research &
Experimental; Statistics & Probability
SC Mathematical & Computational Biology; Public, Environmental &
Occupational Health; Medical Informatics; Research & Experimental
Medicine; Mathematics
GA 434YG
UT WOS:000265309600005
PM 19247982
ER
PT J
AU Bouree, JE
Mahan, AH
AF Bouree, Jean-Eric
Mahan, A. Harv
TI Fifth international conference on hot-wire CVD (Cat-CVD) process Preface
SO THIN SOLID FILMS
LA English
DT Editorial Material
C1 [Bouree, Jean-Eric] Ecole Polytech, Phys Interfaces & Couches Minces Lab, F-91128 Palaiseau, France.
[Mahan, A. Harv] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Bouree, JE (reprint author), Ecole Polytech, Phys Interfaces & Couches Minces Lab, F-91128 Palaiseau, France.
EM jean-eric.bouree@polytechnique.edu; harv_mahan@nrel.gov
NR 0
TC 1
Z9 1
U1 0
U2 1
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0040-6090
J9 THIN SOLID FILMS
JI Thin Solid Films
PD APR 30
PY 2009
VL 517
IS 12
BP 3413
EP 3414
DI 10.1016/j.tsf.2009.01.016
PG 2
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 448YB
UT WOS:000266296800001
ER
PT J
AU Martin, IT
Branz, HM
Stradins, P
Young, DL
Reedy, RC
Teplin, CW
AF Martin, Ina T.
Branz, Howard M.
Stradins, Paul
Young, David L.
Reedy, Robert C.
Teplin, Charles W.
TI Doping of high-quality epitaxial silicon grown by hot-wire chemical
vapor deposition near 700 degrees C
SO THIN SOLID FILMS
LA English
DT Article; Proceedings Paper
CT 5th International Conference on Hot-Wire CVD (Cat-CVD) Process
CY AUG 20-24, 2008
CL Massachusetts Inst Technol, Cambridge, MA
HO Massachusetts Inst Technol
DE Hot-wire; Mobility; Silicon; Epitaxy; Hall; Doping; SIMS; Photovoltaics
ID ION-ASSISTED DEPOSITION; FILM SOLAR-CELLS; POLYCRYSTALLINE SILICON;
TEMPERATURE; BORON
AB We demonstrate that epitaxial layers with a wide range of controllable dopant densities (7 x 10(15)-3 x 10(18)/cm(3) and 10(17)-10(18)/cm(3) for n-type and p-type, respectively) can be grown on wafer substrates at 700 +/- 25 degrees C by hot-wire chemical vapor deposition. Phosphorus from PH(3) is incorporated into the film more efficiently than silicon from SiH(4), leading to efficient doping. Comparison of Hall carrier concentrations to secondary ion mass spectrometry atomic dopant concentration shows that all incorporated dopants are electrically active. The Hall measurements also reveal that the electron mobility in the P-doped films is close to the impurity-scattering limit for crystal Si wafers at room temperature, indicating that our deposited epitaxial materials are high quality. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Martin, Ina T.; Branz, Howard M.; Stradins, Paul; Young, David L.; Reedy, Robert C.; Teplin, Charles W.] Natl Renewable Energy Lab, Natl Ctr Photovolta, Golden, CO 80401 USA.
RP Martin, IT (reprint author), Natl Renewable Energy Lab, Natl Ctr Photovolta, Golden, CO 80401 USA.
EM Ina_Martin@nrel.gov
RI Martin, Ina/J-9484-2012
NR 13
TC 18
Z9 18
U1 0
U2 8
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0040-6090
J9 THIN SOLID FILMS
JI Thin Solid Films
PD APR 30
PY 2009
VL 517
IS 12
BP 3496
EP 3498
DI 10.1016/j.tsf.2009.01.059
PG 3
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 448YB
UT WOS:000266296800022
ER
PT J
AU Mahan, AH
Xu, Y
Gedvilas, LM
Williamson, DL
AF Mahan, A. H.
Xu, Y.
Gedvilas, L. M.
Williamson, D. L.
TI A direct correlation between film structure and solar cell efficiency
for HWCVD amorphous silicon germanium alloys
SO THIN SOLID FILMS
LA English
DT Article; Proceedings Paper
CT 5th International Conference on Hot-Wire CVD (Cat-CVD) Process
CY AUG 20-24, 2008
CL Massachusetts Inst Technol, Cambridge, MA
HO Massachusetts Inst Technol
DE Amorphous silicon germanium; Hot wire CVD; H bonding; Solar cells
ID SIGE-H ALLOYS; HOT-WIRE; MICROSTRUCTURE; DEPOSITION
AB The film structure and H bonding of high deposition rate a-SiGe:H i-layers, deposited by HWCVD and containing similar to 40 at.% Ge, have been investigated using deposition conditions which replicate those used in n-i-p solar cell devices. Increasing the germane source gas depletion in HWCVD causes not only a decrease in solar cell efficiency from 8.64% to less than 7.0%, but also an increase in both the i-layer H preferential attachment ratio (PA) and the film microstructure fraction (R*). Measurements of the XRD medium range order over a wide range of germane depletion indicate that this order is already optimum for the HWCVD i-layers, suggesting that energetic bombardment of a-SiGe:H films may not always be necessary to achieve well ordered films. Preliminary structural comparisons are also made between HWCVD and PECVD device layers. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Mahan, A. H.; Xu, Y.; Gedvilas, L. M.] NREL, Golden, CO 80401 USA.
[Williamson, D. L.] Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA.
RP Mahan, AH (reprint author), NREL, 1617 Cole Blvd, Golden, CO 80401 USA.
EM harv_mahan@nrel.gov
NR 19
TC 9
Z9 9
U1 0
U2 11
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0040-6090
J9 THIN SOLID FILMS
JI Thin Solid Films
PD APR 30
PY 2009
VL 517
IS 12
BP 3532
EP 3535
DI 10.1016/j.tsf.2009.01.073
PG 4
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 448YB
UT WOS:000266296800031
ER
PT J
AU Wang, Q
AF Wang, Qi
TI Hot-wire CVD amorphous Si materials for solar cell application
SO THIN SOLID FILMS
LA English
DT Article; Proceedings Paper
CT 5th International Conference on Hot-Wire CVD (Cat-CVD) Process
CY AUG 20-24, 2008
CL Massachusetts Inst Technol, Cambridge, MA
HO Massachusetts Inst Technol
DE HWCVD; a-Si:H; Solar cell; Thin film
ID CHEMICAL-VAPOR-DEPOSITION; LOW H-CONTENT; SILICON; MICROCRYSTALLINE;
TEMPERATURE
AB Hydrogenated amorphous silicon (a-Si:H) thin films and their application to solar cells fabricated using the hot-wire chemical vapor deposition (HWCVD) or (CAT)-CVD will be reviewed. This review will focus on the comparison to the standard plasma enhance (PE) CVD in the terms of deposition technique, film properties, and solar cell performance. The advantages of using HWCVD for a-Si:H solar cell research as well as the criteria for industry's adaptation of this technique for mass production will be addressed. (C) 2009 Published by Elsevier B.V.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Wang, Q (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM qi_wang@nrel.gov
NR 16
TC 16
Z9 23
U1 1
U2 7
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0040-6090
J9 THIN SOLID FILMS
JI Thin Solid Films
PD APR 30
PY 2009
VL 517
IS 12
BP 3570
EP 3574
DI 10.1016/j.tsf.2009.01.072
PG 5
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 448YB
UT WOS:000266296800041
ER
PT J
AU Lee, SH
Deshpande, R
Benhammou, D
Parilla, PA
Mahan, AH
Dillon, AC
AF Lee, Se-Hee
Deshpande, Rohit
Benhammou, Daniel
Parilla, Phil A.
Mahan, A. Harv
Dillon, Anne C.
TI Metal oxide nanoparticles for advanced energy applications
SO THIN SOLID FILMS
LA English
DT Article; Proceedings Paper
CT 5th International Conference on Hot-Wire CVD (Cat-CVD) Process
CY AUG 20-24, 2008
CL Massachusetts Inst Technol, Cambridge, MA
HO Massachusetts Inst Technol
DE Hot-wire chemical vapor deposition; Molybdenum oxide nanoparticles;
Lithium-ion battery
ID CHEMICAL-VAPOR-DEPOSITION; HIGH-DENSITY; NANOTUBES
AB Hot-wire chemical vapor deposition (HWCVD) has been employed as an economically scalable method for the deposition of crystalline molybdenum oxide nanoparticles at high density. Under optimal synthesis conditions, only crystalline nanostructures with a smallest dimension of similar to 3-50 nm are observed with extensive transmission electron microscopy analyses. The incorporation of crystalline molybdenum oxide nanoparticles into battery electrodes has led to profound advancements in state-of-the-art negative electrodes (anodes) in lithium-ion batteries. The nanoparticle materials exhibit a high rate capability as anticipated for the reduced solid-state Li-ion diffusion length. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Lee, Se-Hee; Benhammou, Daniel] Univ Colorado, Dept Mech Engn, Boulder, CO 80309 USA.
[Deshpande, Rohit; Parilla, Phil A.; Mahan, A. Harv; Dillon, Anne C.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Lee, SH (reprint author), Univ Colorado, Dept Mech Engn, Boulder, CO 80309 USA.
EM sehee.lee@colorado.edu
RI Lee, Sehee/A-5989-2011
NR 8
TC 11
Z9 13
U1 0
U2 8
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0040-6090
J9 THIN SOLID FILMS
JI Thin Solid Films
PD APR 30
PY 2009
VL 517
IS 12
BP 3591
EP 3595
DI 10.1016/j.tsf.2009.01.061
PG 5
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 448YB
UT WOS:000266296800047
ER
PT J
AU White, CM
Gillaspie, DT
Whitney, E
Lee, SH
Dillon, AC
AF White, Christine M.
Gillaspie, Dane T.
Whitney, Erin
Lee, Se-Hee
Dillon, Anne C.
TI Flexible electrochromic devices based on crystalline WO3 nanostructures
produced with hot-wire chemical vapor deposition
SO THIN SOLID FILMS
LA English
DT Article; Proceedings Paper
CT 5th International Conference on Hot-Wire CVD (Cat-CVD) Process
CY AUG 20-24, 2008
CL Massachusetts Inst Technol, Cambridge, MA
HO Massachusetts Inst Technol
DE Hot-wire chemical vapor deposition; Tungsten oxide nanoparticles;
Flexible electrochromic devices; Polymer substrate
ID TUNGSTEN-OXIDE NANOPARTICLES; THIN-FILMS
AB Crystalline WO3 nanoparticles are employed in the development of flexible electrochromic (EC) devices. The nanoparticles are synthesized at high-density with a hot-wire chemical vapor deposition process where the hot filament provides the source of the tungsten metal. Polyethylene terephthalate coated with indium tin oxide is employed as a transparent flexible substrate. A simple electrophoresis technique is employed to deposit the WO3 nanoparticles on the polymer, resulting in a uniform thin film. The EC performance is optimized for WO3 particles that were baked at similar to 300 degrees C for 2 h prior to electrode fabrication. The transmittance is modulated between similar to 94% and similar to 28% without degradation for 100 cycles. (C) 2009 Elsevier B.V. All rights reserved.
C1 [White, Christine M.; Gillaspie, Dane T.; Whitney, Erin; Dillon, Anne C.] Natl Renewable Energy Lab, Golden, CO USA.
[White, Christine M.; Lee, Se-Hee] Univ Colorado, Dept Mech Engn, Boulder, CO 80309 USA.
RP Dillon, AC (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO USA.
EM anne_dillon@nrel.gov
RI Lee, Sehee/A-5989-2011; Gillaspie, Dane/E-2731-2010
NR 13
TC 51
Z9 51
U1 1
U2 27
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0040-6090
J9 THIN SOLID FILMS
JI Thin Solid Films
PD APR 30
PY 2009
VL 517
IS 12
BP 3596
EP 3599
DI 10.1016/j.tsf.2009.01.033
PG 4
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 448YB
UT WOS:000266296800048
ER
PT J
AU She, X
Flytzani-Stephanopoulos, M
Wang, C
Wang, Y
Peden, CHF
AF She, X.
Flytzani-Stephanopoulos, M.
Wang, C.
Wang, Y.
Peden, C. H. F.
TI SO2-induced stability of Ag-alumina catalysts in the SCR of NO with
methane
SO APPLIED CATALYSIS B-ENVIRONMENTAL
LA English
DT Article
DE Silver catalyst; Alumina; Sintering; Dispersion; SO2; SCR of NO; CH4;
NOx reduction
ID SUPPORTED SILVER CATALYSTS; REDUCTION; FILMS; DIFFUSION; OXIDATION;
HYDROCARBONS; ENVIRONMENTS; BEHAVIOR
AB We report on a stabilization effect on the structure and activity of Ag/Al2O3 for the selective catalytic reduction (SCR) of NOx with CH4 imparted by the presence of SO2 in the exhaust gas mixture. The reaction is carried out at temperature above 600 degrees C to keep the surface partially free of sulfates. In SO2-free gases, catalyst deactivation is fast and measurable at these temperatures. Time-resolved TEM analyses of used samples have determined that deactivation is due to sintering of silver from well-dispersed clusters to nanoparticles to micrometer-size particles with time-on-stream at 625 degrees C. However, sintering of silver was dramatically suppressed by the presence of SO2 in the reaction gas mixture. The structural stabilization by SO2 was accompanied by stable catalyst activity for the NO reduction to N-2. The direct oxidation of methane was suppressed, thus the methane selectivity was improved in SO2-laden gas mixtures. In tests with high-content silver alumina with some of the silver present in metallic form, an increase in the SCR activity was found in SO2-containing gas mixtures. This is attributed to redispersion of the silver particles by SO2 an unexpected finding. The catalyst performance was reversible over many cycles of operation at 625 degrees C with the SO2 switched on and off in the gas mixture. (C) 2008 Elsevier B.V. All rights reserved.
C1 [She, X.; Flytzani-Stephanopoulos, M.] Tufts Univ, Dept Biol & Chem Engn, Medford, MA 02155 USA.
[She, X.; Wang, C.; Wang, Y.; Peden, C. H. F.] Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA.
RP Flytzani-Stephanopoulos, M (reprint author), Tufts Univ, Dept Biol & Chem Engn, Medford, MA 02155 USA.
EM maria.flytzani-stephanopoulos@tufts.edu
RI Wang, Yong/C-2344-2013;
OI Peden, Charles/0000-0001-6754-9928
FU National Science Foundation [0304515]; DOE Office of Biological and
Environmental Research
FX This work was funded by the National Science Foundation, NIRT grant
0304515. We gratefully acknowledge the assistance of Dr. Yong Zhang of
the Materials Science and Engineering Center at MIT with the TEM
measurements. Part of the experiments in this work, including some of
the catalyst-pretreatments, TEM and XRD measurements, were performed in
the Environmental Molecular Sciences Laboratory, a national scientific
user facility sponsored by the DOE Office of Biological and
Environmental Research, and located at Pacific Northwest National
Laboratory.
NR 24
TC 17
Z9 18
U1 1
U2 14
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0926-3373
J9 APPL CATAL B-ENVIRON
JI Appl. Catal. B-Environ.
PD APR 29
PY 2009
VL 88
IS 1-2
BP 98
EP 105
DI 10.1016/j.apcatb.2008.09.015
PG 8
WC Chemistry, Physical; Engineering, Environmental; Engineering, Chemical
SC Chemistry; Engineering
GA 444MM
UT WOS:000265985100009
ER
PT J
AU Sun, LL
Yi, W
Wang, L
Shu, JF
Sinogeikin, S
Meng, Y
Shen, G
Bai, LG
Li, YC
Liu, J
Mao, HK
Mao, WL
AF Sun, Liling
Yi, Wei
Wang, Lin
Shu, Jinfu
Sinogeikin, Stas
Meng, Yue
Shen, Guoyin
Bai, Ligang
Li, Yanchuan
Liu, Jing
Mao, Ho-kwang
Mao, Wendy L.
TI X-ray diffraction studies and equation of state of methane at 202 GPa
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID HIGH-PRESSURE; SOLID METHANE; ROOM-TEMPERATURE; GIANT PLANETS;
VOYAGER-2; INTERIORS; CRYSTAL
AB Solid methane (CH(4)) was compressed up to 202 GPa at 300 K in a diamond-anvil cell. The crystal structure and equation of state over this entire range were determined from angle dispersive X-ray diffraction results. CH(4) undergoes phase transitions from rhombohedral to a simple cubic phase at 19 GPa and from simple cubic to a higher pressure cubic phase at approximately 94 GPa. This higher pressure cubic phase was stable to the maximum pressure investigated. Combined with previous optical measurements, it was found that at room temperature compressed CH(4) remains an insulator with cubic structure to 202 GPa. (C) 2009 Elsevier B. V. All rights reserved.
C1 [Sun, Liling; Shu, Jinfu; Mao, Ho-kwang] Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA.
[Sun, Liling; Yi, Wei] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
[Sun, Liling; Yi, Wei] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
[Wang, Lin; Sinogeikin, Stas; Meng, Yue; Shen, Guoyin; Mao, Ho-kwang] Argonne Natl Lab, Adv Photon Source, High Pressure Collaborat Access Team, Argonne, IL 60439 USA.
[Bai, Ligang; Li, Yanchuan; Liu, Jing] Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China.
[Mao, Wendy L.] Stanford Univ, Dept Geog & Environm Sci, Stanford, CA 94305 USA.
[Mao, Wendy L.] Natl Accelerator Ctr, SLAC, Photon Sci Dept, Menlo Pk, CA 94025 USA.
RP Sun, LL (reprint author), Carnegie Inst Washington, Geophys Lab, 5251 Broad Branch Rd NW, Washington, DC 20015 USA.
EM llsun@aphy.iphy.ac.cn; h.mao@gl.ciw.edu
RI Mao, Wendy/D-1885-2009; Shen, Guoyin/D-6527-2011; Yi, Wei/A-1748-2012;
WANG, LIN/G-7884-2012; Bai, Ligang/E-9371-2015
FU National Science Foundation of China [50571111, 10874230]; Ministry of
Science and Technology of China [2005CB724400]; Department of Energy
(DOE) [DE-AC02-76SF00515]; NASA [PGG-NNX08AL27G]; NSF [DMR-0821584];
DOE-BES [DE-AC02-06CH11357]; DOE-NNSA; W. M. Keck Foundation
FX The authors thank the National Science Foundation of China for its
support of this research through Grant Nos. 50571111 and 10874230. This
work was also supported by the Ministry of Science and Technology of
China (2005CB724400), and was supported by the Department of Energy
(DOE) through the Stanford Institute for Materials & Energy Science
DE-AC02-76SF00515, NASA PG&G-NNX08AL27G, and NSF DMR-0821584. This work
was performed at HPCAT (Sector 16), APS, ANL. HPCAT is supported by
DOE-BES, DOE-NNSA, NSF, and the W. M. Keck Foundation. APS is supported
by DOE-BES, under Contract No. DE-AC02-06CH11357.
NR 17
TC 21
Z9 21
U1 2
U2 18
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2614
J9 CHEM PHYS LETT
JI Chem. Phys. Lett.
PD APR 29
PY 2009
VL 473
IS 1-3
BP 72
EP 74
DI 10.1016/j.cplett.2009.03.072
PG 3
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 434JK
UT WOS:000265270800014
ER
PT J
AU Bauer, AL
Beauchemin, CAA
Perelson, AS
AF Bauer, Amy L.
Beauchemin, Catherine A. A.
Perelson, Alan S.
TI Agent-based modeling of host-pathogen systems: The successes and
challenges
SO INFORMATION SCIENCES
LA English
DT Review
DE Agent-based model; Host-pathogen dyamics; Artificial immune system;
Multiscale; Tumor growth; Tuberculosis; Acute inflammation; Sensitivity
analysis
ID NON-SELF DISCRIMINATION; CELLULAR-AUTOMATON MODEL; SHAPE-SPACE MODEL; A
VIRUS-INFECTION; H TH GENESIS; IMMUNE-SYSTEM; LYMPH-NODES; IN-VITRO;
SPATIAL HETEROGENEITY; COMPUTERIZED MODEL
AB Agent-based models have been employed to describe numerous processes in immunology. Simulations based on these types of models have been used to enhance out understanding of immunology and disease pathology. We review various agent-based models relevant to host-pathogen systems and discuss their contributions to our understanding of biological processes. We then point out some limitations and challenges of agent-based models and encourage efforts towards reproducibility and model validation. (c) 2008 Elsevier Inc. All rights reserved.
C1 [Beauchemin, Catherine A. A.; Perelson, Alan S.] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
[Bauer, Amy L.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Beauchemin, Catherine A. A.] Ryerson Univ, Dept Phys, Toronto, ON, Canada.
RP Perelson, AS (reprint author), Los Alamos Natl Lab, Ctr Nonlinear Studies, MS-K710, Los Alamos, NM 87545 USA.
EM asp@lanl.gov
RI Beauchemin, Catherine/G-4619-2011; Barley, Kamal/F-9579-2011
OI Beauchemin, Catherine/0000-0003-0599-0069; Barley,
Kamal/0000-0003-1874-9813
FU US Department of Energy [DE-AC52-06NA25396]; NIH [AI28433, RR06555,
P01-AI071195, NOI-A150020, A173607]; UNM/LANL joint Science and
Technology Laboratory
FX Portions of this work were done under the auspices of the US Department
of Energy under contract DE-AC52-06NA25396 and supported by NIH Grants
AI28433, RR06555, P01-AI071195, and NOI-A150020 (ASP), and the UNM/LANL
joint Science and Technology Laboratory and NIH Grant R21-A173607
(CAAB).
NR 108
TC 75
Z9 75
U1 2
U2 43
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0020-0255
J9 INFORM SCIENCES
JI Inf. Sci.
PD APR 29
PY 2009
VL 179
IS 10
BP 1379
EP 1389
DI 10.1016/j.ins.2008.11.012
PG 11
WC Computer Science, Information Systems
SC Computer Science
GA 431RA
UT WOS:000265079600002
PM 20161146
ER
PT J
AU Souvatzis, P
Bjorkman, T
Eriksson, O
Andersson, P
Katsnelson, MI
Rudin, SP
AF Souvatzis, P.
Bjorkman, T.
Eriksson, O.
Andersson, P.
Katsnelson, M. I.
Rudin, S. P.
TI Dynamical stabilization of the body centered cubic phase in lanthanum
and thorium by phonon-phonon interaction
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID CRYSTAL-STRUCTURE; ACTINIDES; PLUTONIUM; CONSTANTS; PICTURE; LA
AB A recently developed self-consistent ab initio lattice dynamical method has been applied to the high temperature body centered cubic (bcc) phase of La and Th, which are dynamically unstable at low temperatures. The bcc phase of these metals is found to be stabilized by phonon-phonon interactions. The calculated high temperature phonon frequencies for La are found to be in good agreement with the corresponding experimental data.
C1 [Souvatzis, P.; Rudin, S. P.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Bjorkman, T.; Eriksson, O.] Uppsala Univ, Dept Phys, SE-75121 Uppsala, Sweden.
[Andersson, P.] Swedish Def Res Agcy, FOI, SE-16490 Stockholm, Sweden.
[Katsnelson, M. I.] Radboud Univ Nijmegen, Inst Mol & Mat, NL-6525 ED Nijmegen, Netherlands.
RP Souvatzis, P (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM petros.souvatzis@gmail.com
RI Bjorkman, Torbjorn/B-9844-2012; Katsnelson, Mikhail/D-4359-2012;
Eriksson, Olle/E-3265-2014
OI Bjorkman, Torbjorn/0000-0002-1154-9846; Eriksson,
Olle/0000-0001-5111-1374
FU Department of Energy [DE-AC52-06NA25396]
FX The Department of Energy supported this work under Contract No.
DE-AC52-06NA25396.
NR 23
TC 11
Z9 11
U1 0
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD APR 29
PY 2009
VL 21
IS 17
AR 175402
DI 10.1088/0953-8984/21/17/175402
PG 4
WC Physics, Condensed Matter
SC Physics
GA 427LD
UT WOS:000264779900015
PM 21825417
ER
PT J
AU Bowers, MJ
McBride, JR
Garrett, MD
Sammons, JA
Dukes, AD
Schreuder, MA
Watt, TL
Lupini, AR
Pennycook, SJ
Rosenthal, SJ
AF Bowers, Michael J., II
McBride, James R.
Garrett, Maria D.
Sammons, Jessica A.
Dukes, Albert D., III
Schreuder, Michael A.
Watt, Tony L.
Lupini, Andrew R.
Pennycook, Stephen J.
Rosenthal, Sandra J.
TI Structure and Ultrafast Dynamics of White-Light-Emitting CdSe
Nanocrystals
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID FLUORESCENCE UP-CONVERSION; SEMICONDUCTOR QUANTUM DOTS; CARRIER
DYNAMICS; ELECTRONIC-STRUCTURE; SIZE; SPECTROSCOPY; EMISSION; NANORODS;
CLUSTERS; SURFACE
AB White-light emission from ultrasmall CdSe nanocrystals offers an alternative approach to the realization of solid-state lighting as an appealing technology for consumers. Unfortunately, their extremely small size limits the feasibility of traditional methods for nanocrystal characterization. This paper reports the first images of their structure, which were obtained using aberration-corrected atomic number contrast scanning transmission electron microscopy (Z-STEM). With subangstrom resolution, Z-STEM is one of the few available methods that can be used to directly image the nanocrystal's structure. The initial images suggest that they are crystalline and approximately four lattice planes in diameter. In addition to the structure, for the first time, the exciton dynamics were measured at different wavelengths of the white-light spectrum using ultrafast fluorescence upconversion spectroscopy. The data suggest that a myriad of trap states are responsible for the broad-spectrum emission. It is hoped that the information presented here will provide a foundation for the future development and improvement of white-light-emitting nanocrystals.
C1 [Bowers, Michael J., II; McBride, James R.; Garrett, Maria D.; Sammons, Jessica A.; Dukes, Albert D., III; Schreuder, Michael A.; Watt, Tony L.; Rosenthal, Sandra J.] Vanderbilt Univ, Dept Chem, Nashville, TN 37235 USA.
[Rosenthal, Sandra J.] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
[Rosenthal, Sandra J.] Vanderbilt Univ, Dept Pharmacol, Nashville, TN 37235 USA.
[Rosenthal, Sandra J.] Vanderbilt Univ, Dept Chem & Biomol Engn, Nashville, TN 37235 USA.
[Lupini, Andrew R.; Pennycook, Stephen J.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Rosenthal, SJ (reprint author), Vanderbilt Univ, Dept Chem, Box 1583, Nashville, TN 37235 USA.
EM Sandra.j.rosenthal@vanderbilt.edu
RI McBride, James/D-2934-2012
OI McBride, James/0000-0003-0161-7283
FU U.S. Department of Energy [DEFG0202ER45957]
FX Funding was provided by the U.S. Department of Energy (DEFG0202ER45957).
NR 24
TC 49
Z9 49
U1 1
U2 34
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD APR 29
PY 2009
VL 131
IS 16
BP 5730
EP +
DI 10.1021/ja900529h
PG 4
WC Chemistry, Multidisciplinary
SC Chemistry
GA 437BH
UT WOS:000265460200008
PM 19341271
ER
PT J
AU Komanicky, V
Iddir, H
Chang, KC
Menzel, A
Karapetrov, G
Hennessy, D
Zapol, P
You, H
AF Komanicky, Vladimir
Iddir, Hakim
Chang, Kee-Chul
Menzel, Andreas
Karapetrov, Goran
Hennessy, Daniel
Zapol, Peter
You, Hoydoo
TI Shape-Dependent Activity of Platinum Array Catalyst
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID OXYGEN REDUCTION; NANOPARTICLES; SURFACES; ELECTROOXIDATION; KINETICS
AB We produced millions of morphologically identical platinum catalyst nanoparticles in the form of ordered arrays epitaxially grown on (111), (100), and (110) strontium titanate substrates using electron beam lithography. The ability to design, produce, and characterize the catalyst nanoparticles allowed us to relate microscopic morphologies with macroscopic catalytic reactivities. We evaluated the activity of three different arrays containing different ratios of (111) and (100) facets for an oxygen-reduction reaction, the most important reaction for fuel cells. Increased catalytic activity of the arrays points to a possible cooperative interplay between facets with different affinities to oxygen. We suggest that the surface area of (100) facets is one of the key factors governing catalyst performance in the electrochemical reduction of oxygen molecules.
C1 [Komanicky, Vladimir; Iddir, Hakim; Chang, Kee-Chul; Menzel, Andreas; Karapetrov, Goran; Hennessy, Daniel; You, Hoydoo] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Komanicky, Vladimir] Safarik Univ, Fac Sci, Kosice 04154, Slovakia.
[Komanicky, Vladimir] SAS, Inst Expt Phys, Kosice 04154, Slovakia.
[Menzel, Andreas] Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
RP You, H (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM vladimir.komanicky@upjs.sk; hyou@anl.gov
RI Hennessy, Daniel/A-6203-2011; Menzel, Andreas/C-4388-2012; Zapol,
Peter/G-1810-2012; Chang, Kee-Chul/O-9938-2014; You, Hoydoo/A-6201-2011;
Karapetrov, Goran/C-2840-2008
OI Menzel, Andreas/0000-0002-0489-609X; Zapol, Peter/0000-0003-0570-9169;
Chang, Kee-Chul/0000-0003-1775-2148; You, Hoydoo/0000-0003-2996-9483;
Karapetrov, Goran/0000-0003-1113-0137
FU U.S. Department of Energy, Office of Science, Office of Basic Energy
Sciences [DE-AC02-06CH11357]
FX We thank Leonidas Ocola and Ralu Divan for their help during array
nanofabrication. This work and use of the Advanced Photon Source, the
Center for Nanoscale Materials and the Electron Microscopy Center for
Materials Research were supported by the U.S. Department of Energy,
Office of Science, Office of Basic Energy Sciences, under Contract No.
DE-AC02-06CH11357.
NR 11
TC 86
Z9 87
U1 3
U2 56
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD APR 29
PY 2009
VL 131
IS 16
BP 5732
EP +
DI 10.1021/ja900459w
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 437BH
UT WOS:000265460200009
PM 19348484
ER
PT J
AU Tsung, CK
Kuhn, JN
Huang, WY
Aliaga, C
Hung, LI
Somorjai, GA
Yang, PD
AF Tsung, Chia-Kuang
Kuhn, John N.
Huang, Wenyu
Aliaga, Cesar
Hung, Ling-I
Somorjai, Gabor A.
Yang, Peidong
TI Sub-10 nm Platinum Nanocrystals with Size and Shape Control: Catalytic
Study for Ethylene and Pyrrole Hydrogenation
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID SUM-FREQUENCY GENERATION; SINGLE-CRYSTAL SURFACES; MESOPOROUS SBA-15
SILICA; WET CHEMICAL SYNTHESIS; VIBRATIONAL SPECTROSCOPY;
HIGH-PRESSURES; BENZENE HYDROGENATION; C-6 HYDROCARBONS; GOLD NANORODS;
ASPECT-RATIO
AB Platinum nanocubes and nanopolyhedra with tunable size from 5 to 9 nm were synthesized by controlling the reducing rate of metal precursor ions in a one-pot polyol synthesis. A two-stage process is proposed for the simultaneous control of size and shape. In the first stage, the oxidation state of the metal ion precursors determined the nucleation rate and consequently the number of nuclei. The reaction temperature controlled the shape in the second stage by regulation of the growth kinetics. These well-defined nanocrystals were loaded into MCF-17 mesoporous silica for examination of catalytic properties. Pt loadings and dispersions of the supported catalysts were determined by elemental analysis (ICP-MS) and H(2) chemisorption isotherms, respectively. Ethylene hydrogenation rates over the Pt nanocrystals were independent of both size and shape and comparable to Pt single crystals. For pyrrole hydrogenation, the nanocubes enhanced ring-opening ability and thus showed a higher selectivity to n-butylamine as compared to nanopolyhedra.
C1 [Tsung, Chia-Kuang; Kuhn, John N.; Huang, Wenyu; Aliaga, Cesar; Hung, Ling-I; Somorjai, Gabor A.; Yang, Peidong] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Tsung, Chia-Kuang; Kuhn, John N.; Huang, Wenyu; Aliaga, Cesar; Hung, Ling-I; Somorjai, Gabor A.; Yang, Peidong] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem, Berkeley, CA 94720 USA.
[Tsung, Chia-Kuang; Kuhn, John N.; Huang, Wenyu; Aliaga, Cesar; Hung, Ling-I; Somorjai, Gabor A.; Yang, Peidong] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Hung, Ling-I] Ind Technol Res Inst, Mat Lab, Hsinchu 310, Taiwan.
[Hung, Ling-I] Ind Technol Res Inst, Chem Lab, Hsinchu 310, Taiwan.
RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM somorjai@berkeley.edu; p_yang@berkeley.edu
RI Huang, Wenyu/L-3784-2014
OI Huang, Wenyu/0000-0003-2327-7259
FU U.S. Department of Energy [DE-AC02-05CH11231]
FX This work was supported by the Director, Office of Science, Office of
Basic Energy Sciences, Division of Chemical Sciences, Geological and
Biosciences, and Division of Materials Sciences and Engineering of the
U.S. Department of Energy under Contract No. DE-AC02-05CH11231. We also
thank the Molecular Foundry of the Lawrence Berkeley National Laboratory
for use of their facilities and Professor A. Paul Alivisatos for use of
the TEM.
NR 42
TC 304
Z9 307
U1 26
U2 280
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD APR 29
PY 2009
VL 131
IS 16
BP 5816
EP 5822
DI 10.1021/ja809936n
PG 7
WC Chemistry, Multidisciplinary
SC Chemistry
GA 437BH
UT WOS:000265460200030
PM 19341296
ER
PT J
AU Hariharan, M
Zheng, Y
Long, H
Zeidan, TA
Schatz, GC
Vura-Weis, J
Wasielewski, MR
Zuo, XB
Tiede, DM
Lewis, FD
AF Hariharan, Mahesh
Zheng, Yan
Long, Hai
Zeidan, Tarek A.
Schatz, George C.
Vura-Weis, Josh
Wasielewski, Michael R.
Zuo, Xiaobing
Tiede, David M.
Lewis, Frederick D.
TI Hydrophobic Dimerization and Thermal Dissociation of
Perylenediimide-Linked DNA Hairpins
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID PI-PI INTERACTIONS; BISIMIDE DYES; BUILDING-BLOCKS; MELTING TEMPERATURE;
CIRCULAR-DICHROISM; HIGHLY FLUORESCENT; AQUEOUS-SOLUTION; DIMERS; WATER;
DIIMIDE
AB The structure and properties of hairpin-forming bis(oligonucleotide) conjugates possessing perylenediimide (PDI) chromophores as hairpin linkers have been investigated using a combination of spectroscopic and computational methods. These conjugates exist predominantly as monomer hairpins at room temperature in the absence of added salt and as head-to-head hairpin dimers in the presence of >50 mM NaCl. The hairpin dimer structure is consistent with the results of small-angle X-ray scattering in aqueous solution and molecular dynamics simulation. The structure of the nonconjugated PDI dimer in water is investigated using potential of mean force calculations. The salt dependence is attributed to increased cation condensation in the hairpin dimer vs monomer. Upon heating at low salt concentrations, the hairpin dimer undergoes sequential dissociation to form the monomer hairpin followed by conversion to a random coil structure; whereas at high salt concentrations both dissociation processes occur over the same temperature range. The monomer and dimer hairpins have distinct spectroscopic properties both in the ground state and excited singlet state. The UV and CD spectra provide evidence for electronic interaction between PDI and the adjacent base pair. Low fluorescence quantum yields are observed for both the monomer and dimer. The transient absorption spectrum of the dimer undergoes time-dependent spectral changes attributed to a change in the PDI-PDI torsional angle from ca. 20 degrees in the Franck-Condon singlet state to ca. 0 degrees in the relaxed singlet state, a process which occurs within ca. 40 ps.
C1 [Hariharan, Mahesh; Zheng, Yan; Long, Hai; Zeidan, Tarek A.; Schatz, George C.; Vura-Weis, Josh; Wasielewski, Michael R.; Zuo, Xiaobing; Tiede, David M.; Lewis, Frederick D.] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
[Wasielewski, Michael R.; Zuo, Xiaobing; Tiede, David M.] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
RP Lewis, FD (reprint author), Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA.
EM fdl@northwestern.edu
RI Zuo, Xiaobing/F-1469-2010; Long, Hai/C-5838-2015;
OI Zuo, Xiaobing/0000-0002-0134-4804
FU National Science Foundation [CHE-0628130]; Office of Basic Energy
Sciences, DOE [DE-AC02-06CH11357]
FX This research is supported by a grant from the National Science
Foundation, Collaborative Research in Chemistry for the project DNA
Photonics (CHE-0628130 to G.C.S., F.D.L., and M.R.W.). D.M.T. and X.Z.
and the X-ray scattering experiments at the Advanced Photon Source,
beamline 12-ID were supported by the Office of Basic Energy Sciences,
DOE under Contract No. DE-AC02-06CH11357. The authors gratefully
acknowledge Dr. Soenke Seifert for his expert help in setting up the
X-ray scattering measurements.
NR 55
TC 50
Z9 50
U1 1
U2 20
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD APR 29
PY 2009
VL 131
IS 16
BP 5920
EP 5929
DI 10.1021/ja900347t
PG 10
WC Chemistry, Multidisciplinary
SC Chemistry
GA 437BH
UT WOS:000265460200041
PM 19382814
ER
PT J
AU Yang, JY
Bullock, RM
Shaw, WJ
Twamley, B
Fraze, K
DuBois, MR
DuBois, DL
AF Yang, Jenny Y.
Bullock, R. Morris
Shaw, Wendy J.
Twamley, Brendan
Fraze, Kendra
DuBois, M. Rakowski
DuBois, Daniel L.
TI Mechanistic Insights into Catalytic H-2 Oxidation by Ni Complexes
Containing a Diphosphine Ligand with a Positioned Amine Base
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID COUPLED ELECTRON-TRANSFER; PENDANT NITROGEN BASES; ELECTROCATALYTIC
HYDROGEN EVOLUTION; 2ND COORDINATION SPHERE; FE-ONLY HYDROGENASE;
MOLECULAR CATALYSTS; IRON(II) COMPLEXES; PROTON RELAYS; ACTIVE-SITE; LOW
OVERPOTENTIALS
AB The mixed-ligand complex [Ni(dppp)(p(2)(Ph)N(2)(Bz))](BF4)(2), 3, (whem (P2N2Bz)-N-Ph is 1,5-dibenzyl-3,7-diplienyl-1,5-diaza-3,7-diphosphacyclooctane and dppp is 1, 3-bis(diphenylphosphino)propane) has been synthesized. Treatment of this complex with H-2 and triethylamine results in the formation of the NO complex, Ni(dppp)((P2N2Bz)-N-Ph), 4, whose structure has been determined by a single-crystal X-ray diffraction study. Heterolytic cleavage of H-2 by 3 at room temperature forms [HNi(dppp)((P2NBz)-N-Ph(mu-H)N-Bz)](BF4)(2), 5a, in which one proton interacts with two nitrogen atoms of the cyclic diphosphine ligand and a hydride ligand is bound to nickel. Two intermediates are observed for this reaction using low-temperature NMR spectroscopy. One species is a dihydride, [(H)(2)Ni(dppp)((P2N2Bz)-N-Ph)](BF4)(2), 5b, and the other is [Ni(dppp) ((P2N2H2)-N-Ph-H-Bz)](BF4)(2), 5c, in which both protons are bound to the N atoms in an endo geometry with respect to nickel. These two species interconvert via a rapid and reversible intramolecular proton exchange between nickel and the nitrogen atoms of the diphosphine ligand. Complex 3 is a catalyst for the electrochemical oxidation of H-2 in Vie presence of base, and new insights into the mechanism derived from low-temperature NMR and thermodynamic studies are presented. A comparison of the rate and thermodynamics of H-2 addition for this complex to related catalysts studied previously indicates that for Ni-II complexes containing two diphosphine ligands, the activation of H-2 is favored by the presence of two positioned pendant bases.
C1 [Yang, Jenny Y.; Bullock, R. Morris; Shaw, Wendy J.; Twamley, Brendan; Fraze, Kendra; DuBois, M. Rakowski; DuBois, Daniel L.] Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA.
RP DuBois, DL (reprint author), Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA.
EM daniel.dubois@pnl.gov
RI Bullock, R. Morris/L-6802-2016
OI Bullock, R. Morris/0000-0001-6306-4851
FU Office of Basic Energy Sciences of the Department of Energy
FX This work was supported by the Chemical Sciences program of the Office
of Basic Energy Sciences of the Department of Energy. The Pacific
Northwest National Laboratory is operated by Battelle for the U.S.
Department of Energy. The Bruker (Siemens) SMART APEX diffraction
facility was established at the University of Idaho with the assistance
of the NSF-EPSCoR program and the M. J. Murdock Charitable Trust,
Vancouver, WA.
NR 49
TC 97
Z9 97
U1 3
U2 29
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD APR 29
PY 2009
VL 131
IS 16
BP 5935
EP 5945
DI 10.1021/ja900483x
PG 11
WC Chemistry, Multidisciplinary
SC Chemistry
GA 437BH
UT WOS:000265460200043
PM 19341269
ER
PT J
AU Zhang, Q
Saraf, LV
Smitha, JR
Jha, P
Hua, F
AF Zhang, Q.
Saraf, L. V.
Smitha, J. R.
Jha, P.
Hua, F.
TI An invisible bend sensor based on porous crosslinked polyelectrolyte
film
SO SENSORS AND ACTUATORS A-PHYSICAL
LA English
DT Article
DE Electrostatic self-assembly; Porous polymeric film; Ultrathin elastomer;
Tunneling current; Invisible sensor
ID THIN-FILM; WEAK POLYELECTROLYTES; MULTILAYER FILMS; POLYMER; POLYCATION;
POLYANION; DEVICE
AB This paper reports the fabrication and electromechanical characterization of a thin porous polyelectrolyte film and its application in an invisible bending transducer. The porous film consists of 10 bilayers of polycation and polyanion that are adsorbed using electrostatic self-assembly (ESA). Such porous film can be thermally crosslinked. The size of the pores on top surface is adjustable and can be covered up by a type of Na(+)-montmorillonite nanosheet whose size is comparable to those of the pores. As a result, the sealed top surface can be coated by metal for an electrode. After such polymeric film is integrated into a sandwich structure that was designed for a bend sensor, it can perform as an ultrathin piece of elastomer. It is found that the bending of the substrate resulted in the increasing of the current. It is hypothesized that the tunneling current through the thin polymeric film changes when the film is compressed by bending. Finite element simulation corroborates the existence of strain concentration especially near two ends of the polymer film and the shoulder of the bottom electrode. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Zhang, Q.; Smitha, J. R.; Jha, P.; Hua, F.] Clarkson Univ, Dept Elect & Comp Engn, Potsdam, NY 13699 USA.
[Saraf, L. V.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Hua, F (reprint author), Clarkson Univ, Dept Elect & Comp Engn, Potsdam, NY 13699 USA.
EM fhua@clarkson.edu
FU Environmental Molecular Sciences Laboratory; Department of Energy's
Office of Biological and Environmental Research; Pacific Northwest
National Laboratory; University of Illinois at UrbanaChampaign
FX The authors would like to thank the National Center for Supercomputing
Applications at the University of Illinois at UrbanaChampaign for
providing computational and software resources and support.
NR 26
TC 4
Z9 4
U1 1
U2 13
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0924-4247
J9 SENSOR ACTUAT A-PHYS
JI Sens. Actuator A-Phys.
PD APR 29
PY 2009
VL 151
IS 2
BP 154
EP 158
DI 10.1016/j.sna.2009.02.034
PG 5
WC Engineering, Electrical & Electronic; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 444EX
UT WOS:000265964600010
ER
PT J
AU Ma, BW
Woo, CH
Miyamoto, Y
Frechet, JMJ
AF Ma, Biwu
Woo, Claire H.
Miyamoto, Yoshikazu
Frechet, Jean M. J.
TI Solution Processing of a Small Molecule, Subnaphthalocyanine, for
Efficient Organic Photovoltaic Cells
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID SOLAR-CELLS; SUBPHTHALOCYANINES; POLYMER; HETEROJUNCTIONS
AB Solution processing of the small molecule subnaphthalocyanine (SubNc) is carried out for the first time to form an electron-donor layer in efficient planar heterojunction organic photovoltaic cells (OPVs). Due to their unique properties, including high solubility, low tendency to aggregate, and strong light absorption in the visible light region, we are able to prepare amorphous SubNc films with high charge-transporting and light-harvesting properties via simple solution casting. By using SubNc as the donor and C(60) as the acceptor, we have demonstrated a planar heterojunction OPV with a power conversion efficiency of 1.5%, which represents one of the highest efficiencies for planar heterojunction OPVs based on solution processable small molecules to date. This work clearly shows that solution processing of light-harvesting small molecules has great potential in low-cost thin-film photovoltaic cells. Also SubNc and its derivatives are promising new-generation materials for OPVs.
C1 [Ma, Biwu; Miyamoto, Yoshikazu; Frechet, Jean M. J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Woo, Claire H.; Miyamoto, Yoshikazu; Frechet, Jean M. J.] Univ Calif Berkeley, Coll Chem, Berkeley, CA 94720 USA.
RP Ma, BW (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM BWMa@lbl.gov
RI Ma, Biwu/B-6943-2012;
OI Frechet, Jean /0000-0001-6419-0163
FU Office of Science; Office of Basic Energy Sciences; U.S. Department of
Energy [DE-AC02-05, CH 11231]; National Science Foundation; JSR
Corporation [CM900005G]
FX This work was supported by the Office of Science, Office of Basic Energy
Sciences, of the U.S. Department of Energy under contract No. DE-AC02-05
CH 11231. C.H. W. thanks the National Science Foundation for a Graduate
Research Fellowship. Y.M. thanks JSR Corporation for support. CM900005G
NR 29
TC 59
Z9 60
U1 2
U2 27
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0897-4756
J9 CHEM MATER
JI Chem. Mat.
PD APR 28
PY 2009
VL 21
IS 8
BP 1413
EP 1417
DI 10.1021/cm900005g
PG 5
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 436KG
UT WOS:000265412400003
ER
PT J
AU Nyman, M
Shea-Rohwer, LE
Martin, JE
Provencio, P
AF Nyman, May
Shea-Rohwer, Lauren E.
Martin, James E.
Provencio, Paula
TI Nano-YAG:Ce Mechanisms of Growth and Epoxy-Encapsulation
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID LIGHT-EMITTING-DIODES; SOLID-STATE; SPRAY-PYROLYSIS; PHOSPHOR;
PHOTOLUMINESCENCE; ENHANCEMENT; POWDERS
AB We have investigated the mechanism of nano-YAG:Ce growth in butanediol and glycol solvents. The static autoclave and low synthesis temperature (225 degrees C) that we employed provided conditions of slow growth in which we were able to observe an intermediate phase, a butanediol-intercalated layered alumina. This phase serves to passivate the surface in nano-YAG:Ce precipitates and thus contributes to increasing the quantum yield of YAG:Ce by diminishing surface effects such as Ce oxidation. While neat 1,4-butanediol results in precipitation of the nano-YAG:Ce, a mixture of 1,4-butanediol and diethylene glycol stabilizes a transparent colloid. We attribute this to higher solubility of the layered alumina intermediate in the solvent mixture and, thus, more homogeneous nucleation of the nano-YAG:Ce compared to heterogeneous nucleation in the neat 1,4-butanediol. However, the trade-off is slightly lower quantum yield in the transparent colloid, since the nano-YAG:Ce is not as thoroughly surface-passivated. With the transparent colloid, we were able to encapsulate the nano-YAG:Ce into a transparent epoxy dome that may be utilized in solid-state devices.
C1 [Nyman, May; Shea-Rohwer, Lauren E.; Martin, James E.; Provencio, Paula] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Shea-Rohwer, LE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM leshea@sandia.gov
FU United States Department of Energy National Energy Technology Laboratory
[DE-PS26-06NT42942]; Lockheed-Martin Company; United States Department
of Energy [DE-AC04-94AL85000]
FX This work was funded by a grant from the United States Department of
Energy National Energy Technology Laboratory (DE-PS26-06NT42942). Sandia
is a multiprogram laboratory operated by Sandia Corporation, a
Lockheed-Martin Company, for the United States Department of Energy
under Contract No. DE-AC04-94AL85000.
NR 20
TC 57
Z9 58
U1 5
U2 40
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0897-4756
J9 CHEM MATER
JI Chem. Mat.
PD APR 28
PY 2009
VL 21
IS 8
BP 1536
EP 1542
DI 10.1021/cm803137h
PG 7
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 436KG
UT WOS:000265412400020
ER
PT J
AU Coe, JD
Sewell, TD
Shaw, MS
AF Coe, Joshua D.
Sewell, Thomas D.
Shaw, M. Sam
TI Optimal sampling efficiency in Monte Carlo simulation with an
approximate potential
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID DENSITY-FUNCTIONAL THEORY; PROTON-TRANSFER REACTIONS; 1ST PRINCIPLES;
MOLECULAR-DYNAMICS; MARKOV-CHAINS; LIQUID WATER; FLUID; EQUILIBRIA;
ENSEMBLE; SUMMATION
AB Building on the work of Iftimie et al. [J. Chem. Phys. 113, 4852 (2000)] and Gelb [J. Chem. Phys. 118, 7747 (2003)], Boltzmann sampling of an approximate potential (the "reference" system) is used to build a Markov chain in the isothermal-isobaric ensemble. At the end points of the chain, the energy is evaluated at a more accurate level (the "full" system) and a composite move encompassing all of the intervening steps is accepted on the basis of a modified Metropolis criterion. For reference system chains of sufficient length, consecutive full energies are statistically decorrelated and thus far fewer are required to build ensemble averages with a given variance. Without modifying the original algorithm, however, the maximum reference chain length is too short to decorrelate full configurations without dramatically lowering the acceptance probability of the composite move. This difficulty stems from the fact that the reference and full potentials sample different statistical distributions. By manipulating the thermodynamic variables characterizing the reference system (pressure and temperature, in this case), we maximize the average acceptance probability of composite moves, lengthening significantly the random walk between consecutive full energy evaluations. In this manner, the number of full energy evaluations needed to precisely characterize equilibrium properties is dramatically reduced. The method is applied to a model fluid, but implications for sampling high-dimensional systems with ab initio or density functional theory potentials are discussed. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3116788]
C1 [Coe, Joshua D.; Shaw, M. Sam] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Sewell, Thomas D.] Univ Missouri, Dept Chem, Columbia, MO 65211 USA.
RP Coe, JD (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM jcoe@lanl.gov
FU Los Alamos National Laboratory (LANL); National Nuclear Security
Administration (NNSA); LANL Laboratory Directed Research and Development
(LDRD) [W911NF-05-1-0265]; Los Alamos National Security; U. S.
Department of Energy [DEAC52-06NA25396]
FX J. D. C. thanks the Office of the Director at Los Alamos National
Laboratory (LANL) for support in the form of a Director's Postdoctoral
Fellowship. M. S. S. is supported by the LANL High Explosives Project of
the National Nuclear Security Administration (NNSA) Advanced Strategic
Com- puting Program (HE-ASC). T. D. S. is supported by the LANL
Laboratory Directed Research and Development (LDRD) Program and by the
Army Research Office under Grant No. W911NF-05-1-0265. LANL is operated
by Los Alamos National Security L. L. C. under the auspices of the NNSA
and the U. S. Department of Energy, under Contract No. DEAC52-06NA25396.
NR 54
TC 10
Z9 10
U1 0
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD APR 28
PY 2009
VL 130
IS 16
AR 164104
DI 10.1063/1.3116788
PG 12
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 456XD
UT WOS:000266885200005
PM 19405558
ER
PT J
AU Jacobson, MZ
Streets, DG
AF Jacobson, Mark Z.
Streets, David G.
TI Influence of future anthropogenic emissions on climate, natural
emissions, and air quality
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Review
ID TROPOSPHERIC OZONE; SIZE DISTRIBUTIONS; COALESCENCE EFFICIENCIES;
STOMATAL CONDUCTANCE; SULFUR EMISSIONS; NOX PRODUCTION; GLOBAL-MODEL;
BLACK CARBON; GATOR-GCMM; CHEMISTRY
AB This study examines the effects of future anthropogenic emissions on climate, and the resulting feedback to natural emissions and air quality. Speciated sector- and region-specific 2030 emission factors were developed to produce gas and particle emission inventories that followed Special Report on Emission Scenarios (SRES) A1B and B1 emission trajectories. Current and future climate model simulations were run, in which anthropogenic emission changes affected climate, which fed back to natural emissions from lightning (NO, NO2, HONO, HNO3, N2O, H2O2, HO2, CO), soils (dust, bacteria, NO, N2O, H-2, CH4, H2S, DMS, OCS, CS2), the ocean (bacteria, sea spray, DMS, N2O, H-2, CH4), vegetation (pollen, spores, isoprene, monoterpenes, methanol, other VOCs), and photosynthesis/respiration. New methods were derived to calculate lightning flash rates as a function of size-resolved collisions and other physical principles and pollen, spore, and bacteria emissions. Although the B1 scenario was "cleaner'' than the A1B scenario, global warming increased more in the B1 scenario because much A1B warming was masked by additional reflective aerosol particles. Thus neither scenario is entirely beneficial from a climate and health perspective, and the best control measure is to reduce warming gases and warming/cooling particles together. Lightning emissions declined by similar to 3% in the B1 scenario and similar to 12% in the A1B scenario as the number of ice crystals, thus charge-separating bounceoffs, decreased. Net primary production increased by similar to 2% in both scenarios. Emissions of isoprene and monoterpenes increased by similar to 1% in the A1B scenario and 4-5% in the B1 scenario. Near-surface ozone increased by similar to 14% in the A1B scenario and similar to 4% in the B1 scenario, reducing ambient isoprene in the latter case. Gases from soils increased in both scenarios due to higher temperatures. Near-surface PM2.5 mass increased by similar to 2% in the A1B scenario and decreased by similar to 2% in the B1 scenario. The resulting 1.4% higher aerosol optical depths (AODs) in the A1B scenario decreased ocean wind speeds and thus ocean sea spray and bacteria emissions; similar to 5% lower AODs in the B1 scenario had the opposite effect.
C1 [Jacobson, Mark Z.] Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305 USA.
[Streets, David G.] Argonne Natl Lab, Decis & Informat Sci Div, Argonne, IL 60439 USA.
RP Jacobson, MZ (reprint author), Stanford Univ, Dept Civil & Environm Engn, Yang & Yamazaki Environm & Energy Bldg,Room 397, Stanford, CA 94305 USA.
EM jacobson@stanford.edu; dstreets@anl.gov
OI Streets, David/0000-0002-0223-1350
FU NASA [NNG04GE93G, NNG04GJ89G, NNX07AN25G]; US EPA [RD-83337101-O]
FX This work was supported by NASA grants NNG04GE93G, NNG04GJ89G, and
NNX07AN25G and US EPA grant RD-83337101-O. We also thank Cristina L.
Archer, John Ten Hoeve, Jordan Wilkerson, and Mark W. Govett for some
data sets and the NASA High-End Computing Program for computer time.
NR 110
TC 53
Z9 53
U1 8
U2 78
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
EI 2169-8996
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD APR 28
PY 2009
VL 114
AR D08118
DI 10.1029/2008JD011476
PG 21
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 439ZM
UT WOS:000265667200010
ER
PT J
AU Persoon, AM
Gurnett, DA
Santolik, O
Kurth, WS
Faden, JB
Groene, JB
Lewis, GR
Coates, AJ
Wilson, RJ
Tokar, RL
Wahlund, JE
Moncuquet, M
AF Persoon, A. M.
Gurnett, D. A.
Santolik, O.
Kurth, W. S.
Faden, J. B.
Groene, J. B.
Lewis, G. R.
Coates, A. J.
Wilson, R. J.
Tokar, R. L.
Wahlund, J. -E.
Moncuquet, M.
TI A diffusive equilibrium model for the plasma density in Saturn's
magnetosphere
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID ROTATION PERIOD; VOYAGER-2; ELECTRONS; IONS
AB Electron density measurements have been obtained by the Cassini Radio and Plasma Wave Science (RPWS) instrument for more than 50 passes through Saturn's inner magnetosphere from 30 June 2004 to 30 September 2007. The electron densities are derived from RPWS measurements of the upper hybrid resonance frequency and span latitudes up to 35 degrees and L values from 3.6 to 10. The electron density measurements are combined with ion anisotropy measurements from the Cassini Plasma Spectrometer (CAPS) and electron temperature measurements from the RPWS and CAPS to develop a diffusive equilibrium model for the distribution of water group ions, hydrogen ions, and electrons in the inner region of Saturn's magnetosphere. The model uses an analytical solution of the field-aligned force equation, including the ambipolar electric field, to determine the equatorial ion densities and scale heights as a function of L. Density contour plots for water group ions, hydrogen ions, and electrons are presented.
C1 [Persoon, A. M.; Gurnett, D. A.; Kurth, W. S.; Faden, J. B.; Groene, J. B.] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA.
[Santolik, O.] Inst Atmospher Phys, Prague 14131 4, Czech Republic.
[Lewis, G. R.; Coates, A. J.] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England.
[Wilson, R. J.; Tokar, R. L.] Los Alamos Natl Lab, Space & Atmospher Sci Grp, Los Alamos, NM 87545 USA.
[Wahlund, J. -E.] Swedish Inst Space Phys, SE-75121 Uppsala, Sweden.
[Moncuquet, M.] Observ Paris, Lab Etud Spatiales & Instrumentat Astrophys, F-92195 Meudon, France.
[Santolik, O.] Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic.
RP Persoon, AM (reprint author), Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA.
EM ann-persoon@uiowa.edu
RI Coates, Andrew/C-2396-2008; Wilson, Rob/C-2689-2009; Santolik,
Ondrej/F-7766-2014;
OI Coates, Andrew/0000-0002-6185-3125; Wilson, Rob/0000-0001-9276-2368;
Kurth, William/0000-0002-5471-6202
FU NASA [1279973]; NASA/JPL [1243218]; CAPS investigation
FX The Cassini radio and plasma wave research at the University of Iowa is
supported by NASA through JPL contract 1279973. We thank the CAPS and
ELS operations teams at SwRI and MSSL, the ion mass spectrometer team at
Los Alamos under the auspices of the U. S. DOE, STFC for financial
support in the U. K., and NASA/ JPL contract 1243218 for financial
support of the CAPS investigation.
NR 37
TC 59
Z9 60
U1 0
U2 4
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD APR 28
PY 2009
VL 114
AR A04211
DI 10.1029/2008JA013912
PG 19
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 440CI
UT WOS:000265675600006
ER
PT J
AU Hakel, P
Mancini, RC
Abdallah, J
Sherrill, ME
Zhang, HL
AF Hakel, P.
Mancini, R. C.
Abdallah, J.
Sherrill, M. E.
Zhang, H. L.
TI X-ray line polarization spectroscopy of Li-like Si satellite line
spectra
SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
LA English
DT Article
ID LASER-PRODUCED PLASMAS; FE; EXCITATION; HELIUM; CODE
AB We apply the magnetic-sublevel atomic kinetics model POLAR to the calculation of polarization properties of satellite lines in Li-like Si driven by subpicosecond-duration laser pulses. We identify spectral lines whose polarization can serve as a marker of plasma anisotropy due to anisotropy in the electron distribution function. We also discuss the utility and limitations of our current theoretical approach and point out possible future improvements and directions.
C1 [Hakel, P.; Mancini, R. C.] Univ Nevada, Dept Phys, Reno, NV 89557 USA.
[Abdallah, J.; Sherrill, M. E.; Zhang, H. L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Hakel, P (reprint author), Univ Nevada, Dept Phys, Reno, NV 89557 USA.
FU NSHE; Los Alamos National Laboratory; US Department of Energy
[DE-AC52-06NA25396]
FX This work was supported by the NSHE and Los Alamos National Laboratory,
operated by Los Alamos National Security LLC under contract
DE-AC52-06NA25396 from the US Department of Energy (NNSA).
NR 31
TC 10
Z9 10
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-4075
J9 J PHYS B-AT MOL OPT
JI J. Phys. B-At. Mol. Opt. Phys.
PD APR 28
PY 2009
VL 42
IS 8
AR 085701
DI 10.1088/0953-4075/42/8/085701
PG 5
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 430ZN
UT WOS:000265031200025
ER
PT J
AU van Tilborg, J
Allison, TK
Wright, TW
Hertlein, MP
Falcone, RW
Liu, Y
Merdji, H
Belkacem, A
AF van Tilborg, J.
Allison, T. K.
Wright, T. W.
Hertlein, M. P.
Falcone, R. W.
Liu, Y.
Merdji, H.
Belkacem, A.
TI Femtosecond isomerization dynamics in the ethylene cation measured in an
EUV-pump NIR-probe configuration
SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
LA English
DT Article
ID CONICAL INTERSECTIONS; MOLECULAR-DYNAMICS; AB-INITIO; REGION; STATES;
PHOTOIONIZATION; PHOTOCHEMISTRY; ACETYLENE; VALENCE; C2H4
AB Dynamics in the excited ethylene cation C(2)H(4)(+) lead to isomerization to the ethylidene configuration (HC-CH(3))(+), which is predicted to be a transient configuration for electronic relaxation. With an intense femtosecond extreme ultraviolet pump pulse to populate the excited state, and a near infrared probe pulse to produce the fragments CH(+) and CH(3)(+) (which provides a direct signature of ethylidene), we measure optimum fragment yields at a probe delay of 80 fs. Also, an H(2)-stretch transient configuration, yielding H(2)(+) upon probing, is found to succeed the ethylidene configuration. We find that a simple single- or double-decay model does not match the data, and we present a modified model (introduction of an isomerization delay of 50 +/- 25 fs) that does provide agreement.
C1 [van Tilborg, J.; Allison, T. K.; Wright, T. W.; Hertlein, M. P.; Falcone, R. W.; Liu, Y.; Belkacem, A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Merdji, H.] CEA Saclay, Serv Photons Atomes & Mol, F-91191 Gif Sur Yvette, France.
RP van Tilborg, J (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM JvanTilborg@lbl.gov
FU DOE Office of Basic Energy Sciences, Chemical Sciences Division
[DE-AC02-05CH11231, DE-FG52-06NA26212]; UC Berkeley's France-Berkeley
fund
FX We thank T Osipov, F Salmassi and A Aquila for their assistance. This
work was performed under the auspices of the US Department of Energy and
was supported by the DOE Office of Basic Energy Sciences, Chemical
Sciences Division under contract no. DE-AC02-05CH11231. T K Allison was
supported by the DOE SSAA under grant no. DE-FG52-06NA26212. We also
acknowledge financial support from UC Berkeley's France-Berkeley fund.
NR 22
TC 13
Z9 13
U1 3
U2 10
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-4075
J9 J PHYS B-AT MOL OPT
JI J. Phys. B-At. Mol. Opt. Phys.
PD APR 28
PY 2009
VL 42
IS 8
AR 081002
DI 10.1088/0953-4075/42/8/081002
PG 5
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 430ZN
UT WOS:000265031200002
ER
PT J
AU Ismail, AE
Grest, GS
Heine, DR
Stevens, MJ
Tsige, M
AF Ismail, Ahmed E.
Grest, Gary S.
Heine, David R.
Stevens, Mark J.
Tsige, Mesfin
TI Interfacial Structure and Dynamics of Siloxane Systems: PDMS-Vapor and
PDMS-Water
SO MACROMOLECULES
LA English
DT Article
ID INITIO FORCE-FIELD; MOLECULAR-DYNAMICS; SURFACE-TENSION; PERFLUORINATED
ALKANES; DIFFUSION-COEFFICIENTS; QUANTUM-CHEMISTRY; SMALL PENETRANTS;
GLASSY-POLYMERS; POLY(DIMETHYLSILOXANE); SIMULATION
AB Using a fully atomistic force field for polydimethylsiloxane developed by Smith et al. [J. Phys. Chem. B 2004, 108, 20340], we study the interfacial properties of polydimethylsiloxane (PDMS) as well as its interactions with water. We determine the surface tension of methyl- and hydroxyl-terminated PDMS chains with lengths between 20 and 100 repeat units and find good agreement between simulation results and experimental observations. The width of the polymer liquid-vapor interface is shown to depend on both molecular weight and temperature. The surface tension and contact angle are determined for the PDMS-water binary system using several different geometries and calculation methods. At 300 K, the surface tension of roughly 41 mN/m and contact angle of approximate to 108 degrees for chains with 100 repeat units are in excellent agreement with experimental data. The width of the interface in both the PDMS and water layers increases with temperature, although the computed widths are significantly smaller than the liquid-vapor widths of the individual liquids. The diffusion constant measured for low concentrations of water molecules permeating through PDMS shows a wide degree of variation as a result of "caging" effects caused by local density inhomogeneities. At larger concentrations, aggregation of the water molecules leads to phase separation. Finally, the degrees of alignment of the methyl groups and siloxane backbones at the interface are found to decrease with temperature but are augmented in the presence of an interface with water.
C1 [Ismail, Ahmed E.; Grest, Gary S.; Heine, David R.; Stevens, Mark J.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Tsige, Mesfin] So Illinois Univ, Dept Phys, Carbondale, IL 62901 USA.
RP Ismail, AE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM aismail@sandia.gov
RI Ismail, Ahmed/B-7790-2009
OI Ismail, Ahmed/0000-0001-9929-5598
FU Lockheed Martin Company, for the United States Department of Energy
[DE-AC04-94AL85000]
FX Sandia is a multiprogram laboratory operated by Sandia Corporation, a
Lockheed Martin Company, for the United States Department of Energy
under Contract DE-AC04-94AL85000.
NR 59
TC 25
Z9 25
U1 5
U2 50
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
J9 MACROMOLECULES
JI Macromolecules
PD APR 28
PY 2009
VL 42
IS 8
BP 3186
EP 3194
DI 10.1021/ma802805y
PG 9
WC Polymer Science
SC Polymer Science
GA 436JW
UT WOS:000265411400043
ER
PT J
AU Harada, Y
Li, H
Li, HL
Lennarz, WJ
AF Harada, Yoichiro
Li, Hua
Li, Huilin
Lennarz, William J.
TI Oligosaccharyltransferase directly binds to ribosome at a location near
the translocon-binding site
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE electron microscopy; glycoprotein biosynthesis; multicomponent complexes
ID PROTEIN-CONDUCTING CHANNEL; ENDOPLASMIC-RETICULUM MEMBRANE; ACTIVITY
IN-VIVO; SACCHAROMYCES-CEREVISIAE; TRANSFERASE COMPLEX; ANGSTROM
RESOLUTION; MAMMALIAN RIBOSOME; NASCENT CHAINS; RIBOPHORIN-I; YEAST
AB Oligosaccharyltransferase (OT) transfers high mannose-type glycans to the nascent polypeptides that are translated by the membrane-bound ribosome and translocated into the lumen of the endoplasmic reticulum through the Sec61 translocon complex. In this article, we show that purified ribosomes and OT can form a binary complex with a stoichiometry of approximate to 1 to 1 in the presence of detergent. We present evidence that OT may bind to the large ribosomal subunit near the site where nascent polypeptides exit. We further show that OT and the Sec61 complex can simultaneously bind to ribosomes in vitro. Based on existing data and our findings, we propose that cotranslational translocation and N-glycosylation of nascent polypeptides are mediated by a ternary supramolecular complex consisting of OT, the Sec61 complex, and ribosomes.
C1 [Harada, Yoichiro; Li, Huilin; Lennarz, William J.] SUNY Stony Brook, Dept Biochem & Cell Biol, Stony Brook, NY 11794 USA.
[Li, Hua; Li, Huilin] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
RP Lennarz, WJ (reprint author), SUNY Stony Brook, Dept Biochem & Cell Biol, Stony Brook, NY 11794 USA.
EM wlennarz@notes.cc.sunysb.edu
FU National Institute of Health [GM33185]; Brookhaven National Laboratory
Laboratory-Directed Research and Development [06-60]; National
Institutes of Health [GM74985]
FX We thank Dr. Daisuke Kohda (Kyushu University, Fukuoka, Japan) for
providing TAMRA-Arg-Asn-Ala-Thr-Ala-Arg-COOH peptide; Drs. Hermann
Schindelin (University of Wuburg, Wuzburg, Germany), Neta Dean, Gang
Zhao, Guangtao Li, and Hideyuki Takeuchi (Stony Brook University, New
York) for useful discussions; and Dr. Toshi Tsukiyama (Fred Hutchinson
Cancer Research Center, Seattle) for 3FLAG-KANMX6 plasmid. This work was
partially supported by National Institute of Health Grant GM33185 (to W.
J. L), Brookhaven National Laboratory Laboratory-Directed Research and
Development Grant 06-60 (to Huilin Li), and National Institutes of
Health Grant GM74985 (to Huilin Li).
NR 43
TC 29
Z9 30
U1 1
U2 5
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD APR 28
PY 2009
VL 106
IS 17
BP 6945
EP 6949
DI 10.1073/pnas.0812489106
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 438VS
UT WOS:000265584500016
PM 19365066
ER
PT J
AU Hitomi, K
DiTacchio, L
Arvai, AS
Yamamoto, J
Kim, ST
Todo, T
Tainer, JA
Iwai, S
Panda, S
Getzoff, ED
AF Hitomi, Kenichi
DiTacchio, Luciano
Arvai, Andrew S.
Yamamoto, Junpei
Kim, Sang-Tae
Todo, Takeshi
Tainer, John A.
Iwai, Shigenori
Panda, Satchidananda
Getzoff, Elizabeth D.
TI Functional motifs in the (6-4) photolyase crystal structure make a
comparative framework for DNA repair photolyases and clock cryptochromes
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE blue-light photoreceptor; circadian clock; electron transfer;
flavoprotein; FAD
ID BLUE-LIGHT PHOTORECEPTOR; MAMMALIAN CIRCADIAN CLOCK; ESCHERICHIA-COLI;
ARABIDOPSIS-THALIANA; NUCLEAR-LOCALIZATION; ACTIVE-SITE; DROSOPHILA;
PROTEINS; COFACTOR; FAMILY
AB Homologous flavoproteins from the photolyase (PHR)/cryptochrome (CRY) family use the FAD cofactor in PHRs to catalyze DNA repair and in CRYs to tune the circadian clock and control development. To help address how PHR/CRY members achieve these diverse functions, we determined the crystallographic structure of Arabidopsis thaliana (6-4) PHR (UVR3), which is strikingly (>65%) similar in sequence to human circadian clock CRYs. The structure reveals a substrate-binding cavity specific for the UV-induced DNA lesion, (6-4) photoproduct, and cofactor binding sites different from those of bacterial PHRs and consistent with distinct mechanisms for activities and regulation. Mutational analyses were combined with this prototypic structure for the (6-4) PHR/clock CRY cluster to identify structural and functional motifs: phosphate-binding and Pro-Lys-Leu protrusion motifs constricting access to the substrate-binding cavity above FAD, sulfur loop near the external end of the Trp electron-transfer pathway, and previously undefined C-terminal helix. Our results provide a detailed, unified framework for investigations of (6-4) PHRs and the mammalian CRYs. Conservation of key residues and motifs controlling FAD access and activities suggests that regulation of FAD redox properties and radical stability is essential not only for (6-4) photoproduct DNA repair, but also for circadian clock-regulating CRY functions. The structural and functional results reported here elucidate archetypal relationships within this flavoprotein family and suggest how PHRs and CRYs use local residue and cofactor tuning, rather than larger structural modifications, to achieve their diverse functions encompassing DNA repair, plant growth and development, and circadian clock regulation.
C1 [Hitomi, Kenichi; Arvai, Andrew S.; Tainer, John A.; Getzoff, Elizabeth D.] Scripps Res Inst, Dept Mol Biol, La Jolla, CA 92037 USA.
[Hitomi, Kenichi; Arvai, Andrew S.; Tainer, John A.; Getzoff, Elizabeth D.] Scripps Res Inst, Skaggs Inst Chem Biol, La Jolla, CA 92037 USA.
[Hitomi, Kenichi; Yamamoto, Junpei; Iwai, Shigenori] Osaka Univ, Grad Sch Engn Sci, Osaka 5608531, Japan.
[Hitomi, Kenichi; Tainer, John A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
[DiTacchio, Luciano; Panda, Satchidananda] Salk Inst Biol Studies, Regulatory Biol Lab, La Jolla, CA 92037 USA.
[Kim, Sang-Tae; Todo, Takeshi] Kyoto Univ, Ctr Radiat Biol, Kyoto 6068501, Japan.
RP Getzoff, ED (reprint author), Scripps Res Inst, Dept Mol Biol, 10666 N Torrey Pines Rd, La Jolla, CA 92037 USA.
EM edg@scripps.edu
RI DiTacchio, Luciano/D-6341-2011; Panda, Satchidananda/J-6891-2012
OI DiTacchio, Luciano/0000-0001-9570-7348;
FU U.S. Department of Energy Program Integrated Diffraction Analysis
Technologies [DE-AC02-05CH11231]; National Institutes of Health
[GM37684, GM046312, EY016807, 1F32GM082083-01]; Pew Scholars; Asahi
Glass Foundation; Human Frontier Science Program; Japan Society for the
Promotion of Science fellowships; Skaggs Institute for Chemical Biology
FX We thank Dr. H. Nakamura for modeling advice; H. Le, E. Sato, C. Hitomi,
and Drs. M. Ariyoshi and Y. Fujiwara for technical assistance; Drs. T.
Ishikawa, S. Nakajima, and K. Yamamoto for UVR3 sequence information and
help with repair assays; Dr. T. Oyama for the cDNA library; Drs. D.
Shin, J. Huffman, and J. Tubbs for manuscript suggestions; and the
Advanced Light Source, which is supported by U.S. Department of Energy
Program Integrated Diffraction Analysis Technologies under Contract
DE-AC02-05CH11231, for X-ray data collection facilities. This work was
supported by National Institutes of Health Grants GM37684 (to E. D. G.),
GM046312 (to J. A. T.), EY016807 (to S. P.), and 1F32GM082083-01 (to L.
D.), Pew Scholars (S. P.), Asahi Glass Foundation (S. I.), Human
Frontier Science Program (S. I. and J. A. T.), the Japan Society for the
Promotion of Science fellowships (to K. H. and J. Y.), and The Skaggs
Institute for Chemical Biology (K. H.).
NR 55
TC 64
Z9 68
U1 2
U2 17
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD APR 28
PY 2009
VL 106
IS 17
BP 6962
EP 6967
DI 10.1073/pnas.0809180106
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 438VS
UT WOS:000265584500019
PM 19359474
ER
PT J
AU Chambers, M
Verduzco, R
Gleeson, JT
Sprunt, S
Jakli, A
AF Chambers, Martin
Verduzco, Rafael
Gleeson, James T.
Sprunt, Samuel
Jakli, Antal
TI Calamitic Liquid-Crystalline Elastomers Swollen in Bent-Core
Liquid-Crystal Solvents
SO ADVANCED MATERIALS
LA English
DT Article
ID NEMATIC ELASTOMERS; MONOMERS
AB The swelling of calamitic liquid crystal elastomers (LCEs) with bent-core mesogens is investigated in the isotropic phase of both materials. The swelling magnitude and dynamics are determined and fitted with a dual exponential. The host LCEs imbibe bent-core molecules up to 30-40 mol%. The swollen elastomers exhibit nematic phases, with some possessing a lower temperature smectic phase.
C1 [Chambers, Martin; Jakli, Antal] Kent State Univ, Inst Liquid Crystal, Kent, OH 44240 USA.
[Chambers, Martin; Gleeson, James T.; Sprunt, Samuel] Kent State Univ, Dept Phys, Kent, OH 44240 USA.
[Verduzco, Rafael] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37830 USA.
RP Chambers, M (reprint author), Kent State Univ, Inst Liquid Crystal, Kent, OH 44240 USA.
EM mchambers@ijs.si
RI Gleeson, James/B-9208-2008
FU NSF [DMR 0606357, DMR-0606160]; Scientific User Facilities Division,
Office of Basic Energy Sciences, U.S. Department of Energy; ONR
[N00014-07-1-0440]
FX The liquid crystal elastomer system used in this study was provided by
the Slobodan Zurner group ofjozef Stefan Institute and the New Liquid
Crystal Materials Facility (http://nlcmf.Ici.kent.edu) supported by the
NSF (DMR 0606357), the Ohio Department of Development, Kent State
University, and AlphaMicron, Inc. A portion of this work was performed
at Oak Ridge National Laboratory's Center for Nanophase Materials
Sciences, which is sponsored by the Scientific User Facilities Division,
Office of Basic Energy Sciences, U.S. Department of Energy. The authors
would like to acknowledge support from ONR (N00014-07-1-0440) and NSF
(DMR-0606160).
NR 29
TC 17
Z9 17
U1 2
U2 21
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 0935-9648
J9 ADV MATER
JI Adv. Mater.
PD APR 27
PY 2009
VL 21
IS 16
BP 1622
EP +
DI 10.1002/adma.200802739
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 443ZX
UT WOS:000265950500017
ER
PT J
AU Choi, H
Borondics, F
Siegel, DA
Zhou, SY
Martin, MC
Lanzara, A
Kaindl, RA
AF Choi, H.
Borondics, F.
Siegel, D. A.
Zhou, S. Y.
Martin, M. C.
Lanzara, A.
Kaindl, R. A.
TI Broadband electromagnetic response and ultrafast dynamics of few-layer
epitaxial graphene
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE buffer layers; electromagnetism; electron-hole recombination; epitaxial
layers; graphene; high-speed optical techniques; infrared spectra;
monolayers; optical conductivity; photoexcitation; terahertz wave
spectra
ID SILICON-CARBIDE; SPECTROSCOPY; SUBSTRATE
AB We study the broadband optical conductivity and ultrafast carrier dynamics of epitaxial graphene in the few-layer limit. Equilibrium spectra of nominally buffer, monolayer, and multilayer graphene exhibit significant terahertz and near-infrared absorption, consistent with a model of intra- and interband transitions in a dense Dirac electron plasma. Nonequilibrium terahertz transmission changes after photoexcitation are shown to be dominated by excess hole carriers, with a 1.2 ps monoexponential decay that reflects the minority-carrier recombination time.
C1 [Choi, H.; Siegel, D. A.; Zhou, S. Y.; Lanzara, A.; Kaindl, R. A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Borondics, F.; Martin, M. C.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
[Siegel, D. A.; Zhou, S. Y.; Lanzara, A.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RP Choi, H (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RI Zhou, Shuyun/A-5750-2009; Borondics, Ferenc/A-7616-2008;
OI Borondics, Ferenc/0000-0001-9975-4301
FU DOE Office of Basic Energy Sciences [DE-AC02-05CH11231]; Rosztoczy
Foundation
FX This work was supported by the DOE Office of Basic Energy Sciences,
Contract DE-AC02-05CH11231. F.B. acknowledges a scholarship of the
Rosztoczy Foundation.
NR 24
TC 148
Z9 150
U1 10
U2 91
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 27
PY 2009
VL 94
IS 17
AR 172102
DI 10.1063/1.3122348
PG 3
WC Physics, Applied
SC Physics
GA 440ZP
UT WOS:000265738700033
ER
PT J
AU Hawkridge, ME
Liliental-Weber, Z
Kim, HJ
Choi, S
Yoo, D
Ryou, JH
Dupuis, RD
AF Hawkridge, M. E.
Liliental-Weber, Z.
Kim, H. J.
Choi, S.
Yoo, D.
Ryou, J. -H.
Dupuis, R. D.
TI Erratic dislocations within funnel defects in AlN templates for AlGaN
epitaxial layer growth
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE aluminium compounds; dislocations; electro-optical effects; epitaxial
growth; gallium compounds; III-V semiconductors; impurities; MOCVD;
phase separation; semiconductor epitaxial layers; semiconductor growth;
transmission electron microscopy
ID SAPPHIRE; FILMS; GAN
AB We report our transmission electron microscopy observations of erratic dislocation behavior within funnel-like defects on top of AlN templates filled with AlGaN from an overlying epitaxial layer. This dislocation behavior is observed in material where phase separation is also observed. Several bare AlN templates were examined to determine the formation mechanism of the funnels. Our results suggest that they are formed prior to epitaxial layer deposition due to the presence of impurities during template regrowth. We discuss the erratic dislocation behavior in relation to the presence of the phase-separated material and the possible effects of these defects on the optoelectronic properties.
C1 [Hawkridge, M. E.; Liliental-Weber, Z.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Kim, H. J.; Choi, S.; Yoo, D.; Ryou, J. -H.; Dupuis, R. D.] Georgia Inst Technol, Ctr Compound Semicond, Atlanta, GA 30332 USA.
[Kim, H. J.; Choi, S.; Yoo, D.; Ryou, J. -H.; Dupuis, R. D.] Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA.
RP Hawkridge, ME (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, 1 Cyclotron Rd,MS 62R0209-213, Berkeley, CA 94720 USA.
EM mehawkridge@lbl.gov
RI Liliental-Weber, Zuzanna/H-8006-2012
FU Georgia Institute of Technology [R7776S2, FA8718-07-C-0002]; U.S.
Department of Energy [DE-AC02-05CH11231]; National Center for Electron
Microscopy, Lawrence Berkeley National Laboratory
FX This work was supported by the Georgia Institute of Technology Contract
No. R7776S2 (under the DARPA DU-VAP Program Contract No.
FA8718-07-C-0002) through the U.S. Department of Energy under Contract
No. DE-AC02-05CH11231 and was performed at the National Center for
Electron Microscopy, Lawrence Berkeley National Laboratory.
NR 20
TC 4
Z9 4
U1 0
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 27
PY 2009
VL 94
IS 17
AR 171912
DI 10.1063/1.3129870
PG 3
WC Physics, Applied
SC Physics
GA 440ZP
UT WOS:000265738700031
ER
PT J
AU Keavney, DJ
Cheng, XM
Buchanan, KS
AF Keavney, D. J.
Cheng, X. M.
Buchanan, K. S.
TI Polarity reversal of a magnetic vortex core by a unipolar, nonresonant
in-plane pulsed magnetic field
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE ferromagnetic materials; magnetisation; micromagnetics; Permalloy; spin
systems; vortices; X-ray photoelectron spectra
AB We report the polarity reversal of a magnetic vortex core using a nonresonant in-plane pulsed magnetic field of arbitrary waveform studied using time-resolved x-ray photoemission electron microscopy and micromagnetic simulations. The imaging and simulations show that a 5 mT pulse, higher than the critical field for nonlinear effects, effectively leads to the randomization of the vortex core polarity. The micromagnetic simulations further show that the onset of stochastic core polarity randomization does not necessarily coincide with the critical reversal field, leading to a field window for predictable core reversal.
C1 [Keavney, D. J.; Cheng, X. M.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Buchanan, K. S.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
[Buchanan, K. S.] Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA.
RP Cheng, XM (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
EM xmcheng@aps.anl.gov
RI Cheng, Xuemei/D-2388-2010;
OI Cheng, Xuemei/0000-0001-6670-4316; Buchanan, Kristen/0000-0003-0879-0038
FU U.S. Department of Energy, Office of Science, Office of Basic Energy
Sciences [DE-AC02-06CH11357]
FX Use of the Advanced Photon Source and the Center for Nanoscale Materials
at Argonne National Laboratory is supported by the U.S. Department of
Energy, Office of Science, Office of Basic Energy Sciences, under
Contract No. DE-AC02-06CH11357.
NR 11
TC 14
Z9 14
U1 0
U2 10
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 27
PY 2009
VL 94
IS 17
AR 172506
DI 10.1063/1.3111430
PG 3
WC Physics, Applied
SC Physics
GA 440ZP
UT WOS:000265738700045
ER
PT J
AU Kraessig, B
Dunford, RW
Kanter, EP
Landahl, EC
Southworth, SH
Young, L
AF Kraessig, Bertold
Dunford, R. W.
Kanter, E. P.
Landahl, E. C.
Southworth, S. H.
Young, L.
TI A simple cross-correlation technique between infrared and hard x-ray
pulses
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE fluorescence; krypton; optical pulse generation; photoionisation; X-ray
absorption; X-ray emission spectra
AB We report a gas phase technique to establish the temporal overlap of ultrafast infrared laser and hard x-ray pulses. We use tunnel ionization of a closed shell atom in the strong field at the focus of an infrared laser beam to open a distinct x-ray absorption resonance channel with a clear fluorescence signature. The technique has an intrinsic response of a few femtoseconds and is nondestructive to the two beams. It provides a step-functionlike cross-correlation result. The details of the transient provide a diagnostic of the temporal overlap of the two pulses.
C1 [Kraessig, Bertold; Dunford, R. W.; Kanter, E. P.; Landahl, E. C.; Southworth, S. H.; Young, L.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Kraessig, B (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM kraessig@anl.gov
RI Landahl, Eric/A-1742-2010
FU Chemical Sciences, Geosciences, and Biosciences Division; Office of
Basic Energy Sciences, Office of Science, U. S. Department of Energy
[DE-AC02-06CH11357]
FX This work was supported by the Chemical Sciences, Geosciences, and
Biosciences Division, (and also in the case of the Advanced Photon
Source) the Office of Basic Energy Sciences, Office of Science, U. S.
Department of Energy under Contract No. DE-AC02-06CH11357.
NR 18
TC 6
Z9 6
U1 0
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 27
PY 2009
VL 94
IS 17
AR 171113
DI 10.1063/1.3125256
PG 3
WC Physics, Applied
SC Physics
GA 440ZP
UT WOS:000265738700013
ER
PT J
AU Li, TL
Lee, JH
Gao, YF
Pharr, GM
Huang, M
Tsui, TY
AF Li, T. L.
Lee, J. H.
Gao, Y. F.
Pharr, G. M.
Huang, M.
Tsui, T. Y.
TI Geometric effects on dislocation nucleation in strained electronics
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE dislocation loops; dislocation nucleation; integrated circuits;
nanoelectronics; slip
ID MASK-EDGE DEFECTS; TANGENTIAL CONTACT; ADHESIVE CONTACT;
MICRO-PLASTICITY; SURFACE STEPS; SILICON; STRESS; MODULUS; GROWTH; SI
AB Dislocation loops may be nucleated from sharp geometric features in strained micro- and nano-electronic devices. This process is investigated by a dissipative cohesive interface model which treats the dislocation core as a continuous, inhomogeneous lattice slip field. As a representative example, we calculate the critical external stress for dislocation nucleation from the edges/corners of a rectangular stress-free Si(3)N(4) pad on a Si substrate as a function of geometric parameters such as the length-to-height ratio and the three-dimensional shape of the pad. The shapes of the dislocations are also simulated.
C1 [Li, T. L.; Lee, J. H.; Gao, Y. F.; Pharr, G. M.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Gao, Y. F.] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
[Pharr, G. M.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Huang, M.] GE Global Res Ctr, Niskayuna, NY 12309 USA.
[Tsui, T. Y.] Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada.
RP Li, TL (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
EM ygao7@utk.edu
RI Li, Tianlei/F-8865-2010; Gao, Yanfei/F-9034-2010; Lee, Jin
Haeng/E-2457-2011; Huang, Min/B-9269-2008
OI Li, Tianlei/0000-0003-1962-9290; Gao, Yanfei/0000-0003-2082-857X; Huang,
Min/0000-0002-1282-1573
FU National Science Foundation; Center for Materials Processing; Joint
Institute of Advanced Materials at the University of Tennessee; Korean
Government (MOEHRD) [KRF-352-D00001]; Division of Materials Sciences and
Engineering, Office of Basic Energy Sciences, U. S. Department of Energy
[DE-AC05-00OR22725]
FX The authors acknowledge support from the National Science Foundation,
the Center for Materials Processing, and the Joint Institute of Advanced
Materials at the University of Tennessee. J.H.L. was partially supported
by the Korea Research Foundation Grant (Grant No. KRF-352-D00001) funded
by the Korean Government (MOEHRD). Research at the Oak Ridge National
Laboratory was sponsored by the Division of Materials Sciences and
Engineering, Office of Basic Energy Sciences, U. S. Department of
Energy, under Contract No. DE-AC05-00OR22725 with UT-Battelle, LLC.
NR 31
TC 7
Z9 7
U1 0
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 27
PY 2009
VL 94
IS 17
AR 171905
DI 10.1063/1.3126520
PG 3
WC Physics, Applied
SC Physics
GA 440ZP
UT WOS:000265738700024
ER
PT J
AU Obukhov, Y
Pelekhov, DV
Nazaretski, E
Movshovich, R
Hammel, PC
AF Obukhov, Yu.
Pelekhov, D. V.
Nazaretski, E.
Movshovich, R.
Hammel, P. C.
TI Effect of localized magnetic field on the uniform ferromagnetic
resonance mode in a thin film
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE ferromagnetic resonance; ferromagnetism; magnetic force microscopy;
magnetic moments; magnetic thin films; magnetisation; micromagnetics
AB We theoretically analyze the influence of the micromagnetic probe used in ferromagnetic resonance force microscopy (FMRFM) on the ferromagnetic resonance (FMR) modes in a thin ferromagnetic film. Our analysis of the FMRFM force response reveals three regimes defined by the extent to which the probe perturbs the uniform FMR mode. With closer approach, the FMRFM force grows more slowly because the strengthening probe field suppresses the FMR response. Our analysis agrees well with experimental data and provides theoretical foundations for FMRFM imaging.
C1 [Obukhov, Yu.; Pelekhov, D. V.; Hammel, P. C.] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
[Nazaretski, E.; Movshovich, R.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Obukhov, Y (reprint author), Ohio State Univ, Dept Phys, 174 W 18th Ave, Columbus, OH 43210 USA.
EM oboukhov@mps.ohio-state.edu; hammel@mps.ohio-state.edu
RI Hammel, P Chris/O-4845-2014
OI Hammel, P Chris/0000-0002-4138-4798
FU U.S. Department of Energy [DE-FG02-03ER46054]
FX This work was supported by the U.S. Department of Energy through Grant
No. DE-FG02-03ER46054. Work at Los Alamos National Laboratory was
performed under the auspices of the U.S. Department of Energy.
NR 11
TC 5
Z9 5
U1 0
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 27
PY 2009
VL 94
IS 17
AR 172508
DI 10.1063/1.3123264
PG 3
WC Physics, Applied
SC Physics
GA 440ZP
UT WOS:000265738700047
ER
PT J
AU Wei, HX
Qin, QH
Wen, ZC
Han, XF
Zhang, XG
AF Wei, H. X.
Qin, Q. H.
Wen, Z. C.
Han, X. F.
Zhang, X. -G.
TI Magnetic tunnel junction sensor with Co/Pt perpendicular anisotropy
ferromagnetic layer
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE cobalt; ferromagnetic materials; magnetic anisotropy; magnetic sensors;
magnetic tunnelling; magnetoresistance; platinum
ID MAGNETORESISTANCE SENSOR; FIELD
AB Linear magnetoresistance is an important attribute for magnetic sensor design in space applications, three-dimensional detection of the magnetic field, and high field measurements. Here we demonstrate that a large linear magnetoresistance of up to 22% can be achieved in a magnetic tunnel junction that consists of two ferromagnetic layers, one with out of plane and one with in-plane magnetic anisotropy. The tunneling magnetoresistance with the electrical current perpendicular to the film plane and the magnetic configuration of the device are analyzed.
C1 [Wei, H. X.; Qin, Q. H.; Wen, Z. C.; Han, X. F.] Chinese Acad Sci, State Key Lab Magnetism, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China.
[Zhang, X. -G.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci & Comp Sci, Oak Ridge, TN 37831 USA.
[Zhang, X. -G.] Oak Ridge Natl Lab, Div Math, Oak Ridge, TN 37831 USA.
RP Han, XF (reprint author), Chinese Acad Sci, State Key Lab Magnetism, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China.
EM hxwei@aphy.iphy.ac.cn; xfhan@aphy.iphy.ac.cn; xgz@ornl.gov
RI Qin, Qihang/E-7266-2012;
OI Wen, Zhenchao/0000-0001-7496-1339
FU Ministry of Science and Technology (MOST) [2006CB932200, 2009CB929203];
National Natural Science Foundation (NSFC) [10874225, 50721001,
60871048]; NSFC-The Royal Society (U. K.); NSFC-Australia DEST; K. C.
Wong Education Foundation, Hong Kong; U. S. Department of Energy
FX The project was supported by the State Key Project of Fundamental
Research of Ministry of Science and Technology (MOST, Grant Nos.
2006CB932200 and 2009CB929203) and National Natural Science Foundation
(NSFC, Grant Nos. 10874225, 50721001, and 60871048). X. F. H. thanks the
partial support of the international joint projects of NSFC-The Royal
Society (U. K.) and NSFC-Australia DEST and the partial support by K. C.
Wong Education Foundation, Hong Kong. A portion of this research at
ORNL's CNMS was sponsored by the Scientific User Facilities Division,
Office of Basic Energy Sciences, U. S. Department of Energy.
NR 10
TC 26
Z9 26
U1 1
U2 17
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 27
PY 2009
VL 94
IS 17
AR 172902
DI 10.1063/1.3126064
PG 3
WC Physics, Applied
SC Physics
GA 440ZP
UT WOS:000265738700054
ER
PT J
AU Wong-Ng, W
Otani, M
Levin, I
Schenck, P
Yang, Z
Liu, G
Cook, LP
Feenstra, R
Zhang, W
Rupich, MW
AF Wong-Ng, W.
Otani, M.
Levin, I.
Schenck, P.
Yang, Z.
Liu, G.
Cook, L. P.
Feenstra, R.
Zhang, W.
Rupich, M. W.
TI A phase relation study of Ba-Y-Cu-O coated-conductor films using the
combinatorial approach
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE annealing; barium compounds; flux pinning; high-temperature
superconductors; reaction kinetics; superconducting thin films; yttrium
compounds
ID THIN-FILMS; SUPERCONDUCTORS; DEPOSITION; PROGRESS; GROWTH; SYSTEM
AB Phase relationships in bulk and thin film Ba-Y-Cu-O high-T(c) superconductor system were determined at processing conditions relevant for industrial production of coated conductors. Our results demonstrated that the absence of BaY(2)CuO(5) (which has a critical effect on flux pinning) at 735 degrees C-a typical temperature employed in production of coated conductors-in thin films processed in situ from the BaF(2) precursor is caused by the sluggish reaction kinetics rather than by the presence of fluorine in the system. Thermodynamic calculations combined with annealing experiments confirmed that BaY(2)CuO(5) is thermodynamically stable but forms at temperatures higher than 735 degrees C.
C1 [Wong-Ng, W.; Otani, M.; Levin, I.; Schenck, P.; Yang, Z.; Liu, G.; Cook, L. P.] NIST, Div Ceram, Mat Sci & Engn Lab, Gaithersburg, MD 20899 USA.
[Feenstra, R.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Zhang, W.; Rupich, M. W.] Amer Superconductor Corp, Westborough, MA 01581 USA.
RP Wong-Ng, W (reprint author), NIST, Div Ceram, Mat Sci & Engn Lab, Gaithersburg, MD 20899 USA.
EM winnie.wong-ng@nist.gov
RI Levin, Igor/F-8588-2010
FU U.S. Department of Energy
FX This work was partially supported by the U.S. Department of Energy.
NR 21
TC 4
Z9 5
U1 0
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 27
PY 2009
VL 94
IS 17
AR 171910
DI 10.1063/1.3127222
PG 3
WC Physics, Applied
SC Physics
GA 440ZP
UT WOS:000265738700029
ER
PT J
AU Schober, D
Smith, B
Lewis, SE
Kusnierczyk, W
Lomax, J
Mungall, C
Taylor, CF
Rocca-Serra, P
Sansone, SA
AF Schober, Daniel
Smith, Barry
Lewis, Suzanna E.
Kusnierczyk, Waclaw
Lomax, Jane
Mungall, Chris
Taylor, Chris F.
Rocca-Serra, Philippe
Sansone, Susanna-Assunta
TI Survey-based naming conventions for use in OBO Foundry ontology
development
SO BMC BIOINFORMATICS
LA English
DT Article
ID BIO-ONTOLOGIES; NOMENCLATURE
AB Background: A wide variety of ontologies relevant to the biological and medical domains are available through the OBO Foundry portal, and their number is growing rapidly. Integration of these ontologies, while requiring considerable effort, is extremely desirable. However, heterogeneities in format and style pose serious obstacles to such integration. In particular, inconsistencies in naming conventions can impair the readability and navigability of ontology class hierarchies, and hinder their alignment and integration. While other sources of diversity are tremendously complex and challenging, agreeing a set of common naming conventions is an achievable goal, particularly if those conventions are based on lessons drawn from pooled practical experience and surveys of community opinion.
Results: We summarize a review of existing naming conventions and highlight certain disadvantages with respect to general applicability in the biological domain. We also present the results of a survey carried out to establish which naming conventions are currently employed by OBO Foundry ontologies and to determine what their special requirements regarding the naming of entities might be. Lastly, we propose an initial set of typographic, syntactic and semantic conventions for labelling classes in OBO Foundry ontologies.
Conclusion: Adherence to common naming conventions is more than just a matter of aesthetics. Such conventions provide guidance to ontology creators, help developers avoid flaws and inaccuracies when editing, and especially when interlinking, ontologies. Common naming conventions will also assist consumers of ontologies to more readily understand what meanings were intended by the authors of ontologies used in annotating bodies of data.
C1 [Schober, Daniel; Lomax, Jane; Taylor, Chris F.; Rocca-Serra, Philippe; Sansone, Susanna-Assunta] EBI, EMBL, Cambridge CB10 1SD, England.
[Schober, Daniel] Univ Med Ctr, Inst Med Biometry & Med Informat IMBI, D-79104 Freiburg, Germany.
[Smith, Barry] SUNY Buffalo, Dept Philosophy, Buffalo, NY 14260 USA.
[Smith, Barry] SUNY Buffalo, Ctr Excellence Bioinformat & Life Sci, Buffalo, NY 14260 USA.
[Lewis, Suzanna E.; Mungall, Chris] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley Bioinformat & Ontol Project, Berkeley, CA 94720 USA.
[Kusnierczyk, Waclaw] Norwegian Univ Sci & Technol, NTNU, Dept Informat & Comp Sci, N-7034 Trondheim, Norway.
[Taylor, Chris F.] NERC Environm Bioinformat Ctr NEBC, Oxford OX1 3SR, England.
RP Sansone, SA (reprint author), EBI, EMBL, Wellcome Trust Genome Campus, Cambridge CB10 1SD, England.
EM schober@imbi.uni-freiburg.de; phismith@buffalo.edu;
suzi@berkeleybop.org; Waclaw.Marcin.Kusnierczyk@idi.ntnu.no;
jane@ebi.ac.uk; cjm@fruitfly.org; chris.taylor@ebi.uk; rocca@ebi.ac.uk;
sansone@ebi.ac.uk
RI Smith, Barry/A-9525-2011;
OI Smith, Barry/0000-0003-1384-116X; Lomax, Jane/0000-0001-8865-4321;
Lewis, Suzanna/0000-0002-8343-612X
FU Biotechnology and Biological Sciences Research Council [BB/E025080/1,
BB/D524283/1]; NHGRI NIH HHS [1 U 54 HG004028, U54 HG004028]
NR 23
TC 26
Z9 26
U1 1
U2 2
PU BIOMED CENTRAL LTD
PI LONDON
PA CURRENT SCIENCE GROUP, MIDDLESEX HOUSE, 34-42 CLEVELAND ST, LONDON W1T
4LB, ENGLAND
SN 1471-2105
J9 BMC BIOINFORMATICS
JI BMC Bioinformatics
PD APR 27
PY 2009
VL 10
AR 125
DI 10.1186/1471-2105-10-125
PG 9
WC Biochemical Research Methods; Biotechnology & Applied Microbiology;
Mathematical & Computational Biology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
Mathematical & Computational Biology
GA 453JE
UT WOS:000266605900001
PM 19397794
ER
PT J
AU Ribaudo, T
Shaner, EA
Howard, SS
Gmachl, C
Wang, XJ
Choa, FS
Wasserman, D
AF Ribaudo, T.
Shaner, E. A.
Howard, S. S.
Gmachl, C.
Wang, X. J.
Choa, F. -S.
Wasserman, D.
TI Active Control and Spatial Mapping of Mid-Infrared Propagating Surface
Plasmons
SO OPTICS EXPRESS
LA English
DT Article
ID EXTRAORDINARY OPTICAL-TRANSMISSION; SUBWAVELENGTH HOLE ARRAYS; THIN
METAL-FILMS; LOSS MECHANISMS; LIGHT; APERTURES
AB Periodic arrays of subwavelength apertures in metal films have been shown to exhibit strongly enhanced transmission at wavelengths determined by the periodicity of the film as well as the optical properties of the metal and surrounding dielectric material. Here we investigate the coupling between such a grating and a Quantum Cascade Laser. By actively tuning the optical properties of our grating, we control the coupling of laser light to the plasmonic structure, switching our grating from a predominantly transmitting state to a state that allows coupling to propagating surface waves, which can then be imaged on the metallic surface. (C) 2009 Optical Society of America
C1 [Ribaudo, T.; Wasserman, D.] Univ Massachusetts, Dept Phys, Lowell, MA 01854 USA.
[Shaner, E. A.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Howard, S. S.; Gmachl, C.] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA.
[Wang, X. J.] Adtech Opt Inc, City Of Industry, CA 91748 USA.
[Choa, F. -S.] Univ Maryland Baltimore Cty, Dept CSEE, Baltimore, MD 21250 USA.
RP Wasserman, D (reprint author), Univ Massachusetts, Dept Phys, 1 Univ Ave, Lowell, MA 01854 USA.
EM daniel_wasserman@uml.edu
RI Wasserman, Daniel/D-3913-2011; Howard, Scott/D-2900-2011
OI Howard, Scott/0000-0003-3246-6799
FU United States Department of Energy's National Nuclear Security
Administration [DE-AC04-94AL85000]
FX The authors would like to thank L. Cheng and D. Bethke for laser
overgrowth and sample fabrication assistance, respectively. Sandia is a
multiprogram laboratory operated by Sandia Corporation, a Lockheed
Martin Company, for the United States Department of Energy's National
Nuclear Security Administration under contract DE-AC04-94AL85000.
NR 31
TC 11
Z9 11
U1 1
U2 5
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD APR 27
PY 2009
VL 17
IS 9
BP 7019
EP 7024
DI 10.1364/OE.17.007019
PG 6
WC Optics
SC Optics
GA 450DR
UT WOS:000266381700013
PM 19399076
ER
PT J
AU Chow, WW
Wieczorek, S
AF Chow, Weng W.
Wieczorek, Sebastian
TI Using chaos for remote sensing of laser radiation
SO OPTICS EXPRESS
LA English
DT Article
ID SEMICONDUCTOR-LASER; OPTICAL-INJECTION; DYNAMICS; SUBJECT; SIGNAL
AB An idea is proposed for detecting a weak laser signal from a remote source in the presence of strong background noise. The scheme exploits dynamical nonlinearities arising from heterodyning signal and reference fields inside an active reference laser cavity. This paper shows that for certain reference laser configurations, the resulting bifurcations in the reference laser may be used as warning of irradiation by a laser source. (c) 2009 Optical Society of America
C1 [Chow, Weng W.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Wieczorek, Sebastian] Univ Exeter, Math Res Inst, Exeter EX4 4QF, Devon, England.
[Chow, Weng W.] Texas A&M Univ, Inst Quantum Studies, College Stn, TX 77843 USA.
[Chow, Weng W.] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA.
RP Chow, WW (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM wwchow@sandia.gov
FU United States Department of Energy's Laboratory Directed Research and
Development (LDRD)
FX The work is supported by the United States Department of Energy's
Laboratory Directed Research and Development (LDRD) program at Sandia
National Laboratories and by the Alexander von Humboldt Foundation.
NR 20
TC 8
Z9 8
U1 0
U2 1
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD APR 27
PY 2009
VL 17
IS 9
BP 7491
EP 7504
DI 10.1364/OE.17.007491
PG 14
WC Optics
SC Optics
GA 450DR
UT WOS:000266381700064
PM 19399127
ER
PT J
AU Choi, H
Pile, DFP
Nam, S
Bartal, G
Zhang, X
AF Choi, Hyeunseok
Pile, David F. P.
Nam, Sunghyun
Bartal, Guy
Zhang, Xiang
TI Compressing surface plasmons for nano-scale optical focusing
SO OPTICS EXPRESS
LA English
DT Article
ID WAVE-GUIDES; POLARITONS; SUPERLENS; FIELD; BEAM
AB A major challenge in optics is how to deliver and concentrate light from the micron-scale into the nano-scale. Light can not be guided, by conventional mechanisms, with optical beam sizes significantly smaller than its wavelength due to the diffraction limit. On the other hand, focusing of light into very small volumes beyond the diffraction limit can be achieved by exploiting the wavelength scalability of surface plasmon polaritons. By slowing down an optical wave and shrinking its wavelength during its propagation, optical energy can be compressed and concentrated down to nanometer scale, namely, nanofocusing. Here, we experimentally demonstrate and quantitatively measure the nanofocusing of surface plasmon polaritons in tapered metallic V-grooves down to the deep sub-wavelength scale - lambda/40 at wavelength of 1.5 micron - with almost 50% power efficiency. (c) 2009 Optical Society of America
C1 [Choi, Hyeunseok; Pile, David F. P.; Nam, Sunghyun; Bartal, Guy; Zhang, Xiang] Univ Calif Berkeley, NSF Nanoscale Sci & Engn Ctr, Berkeley, CA 94720 USA.
[Zhang, Xiang] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Zhang, X (reprint author), Univ Calif Berkeley, NSF Nanoscale Sci & Engn Ctr, 5130 Etcheverry Hall, Berkeley, CA 94720 USA.
EM xiang@berkeley.edu
RI Zhang, Xiang/F-6905-2011;
OI Pile, David/0000-0001-9961-1319
FU DARPA [HR0011-05-3-0002 a]; NSF Nanoscale Science and Technology Center
(NSEC) [CMMI-0751621]; Korea Research Foundation Grant funded by the
Korean Government (MOEHRD, Basic Research Promotion Fund)
[KRF-2006-352-D00020]
FX This work was supported by DARPA under grant HR0011-05-3-0002 and NSF
Nanoscale Science and Technology Center (NSEC) under award number
CMMI-0751621. H. Choi was supported by the Korea Research Foundation
Grant funded by the Korean Government (MOEHRD, Basic Research Promotion
Fund) (KRF-2006-352-D00020).
NR 29
TC 84
Z9 84
U1 3
U2 39
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD APR 27
PY 2009
VL 17
IS 9
BP 7519
EP 7524
DI 10.1364/OE.17.007519
PG 6
WC Optics
SC Optics
GA 450DR
UT WOS:000266381700066
PM 19399129
ER
PT J
AU de Florian, D
Grazzini, M
AF de Florian, Daniel
Grazzini, Massimiliano
TI Higgs production through gluon fusion: Updated cross sections at the
Tevatron and the LHC
SO PHYSICS LETTERS B
LA English
DT Article
ID FINITE-TOP-MASS; BOSON PRODUCTION; PARTON DISTRIBUTIONS; HADRON
COLLIDERS; NNLO; QCD; ORDER
AB We present updated predictions for the total cross section for Higgs boson production by gluon-gluon fusion in hadron collisions. Our calculation includes the most advanced theoretical information available at present for this observable: soft-gluon resummation up to next-to-next-to-leading logarithmic accuracy, the exact treatment of the bottom-quark contribution tip to next-to-leading order, and two-loop electroweak effects. We adopt the most recent parametrization of parton distribution functions at next-to-next-to-leading order, and we evaluate the corresponding uncertainties. In comparison with our previous central predictions, at the Tevatron the difference ranges from +9% for m(H) = 115 GeV to -9% for m(H) = 200 GeV. At the LHC the cross section is instead significantly increased. The effect goes from +30% for m(H) = 115 GeV to +9% for m(H) = 300 GeV, and is mostly due to the new parton distribution functions. We also provide new predictions for the LHC at root s = 10 TeV. (C) 2009 Elsevier B.V. All rights reserved.
C1 [de Florian, Daniel] Univ Buenos Aires, FCEYN, Dept Fis, RA-1428 Buenos Aires, DF, Argentina.
[de Florian, Daniel] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
[Grazzini, Massimiliano] Univ Florence, Ist Nazl Fis Nucl, Sez Firenze, I-50019 Florence, Italy.
[Grazzini, Massimiliano] Univ Florence, Dipartimento Fis, I-50019 Florence, Italy.
RP de Florian, D (reprint author), Univ Buenos Aires, FCEYN, Dept Fis, Pabello 1 Ciudad Univ, RA-1428 Buenos Aires, DF, Argentina.
EM deflo@df.uba.ar; grazzini@fi.infn.it
RI de Florian, Daniel/B-6902-2011
OI de Florian, Daniel/0000-0002-3724-0695
FU ANPCYT; UBA-CyT; CONICET; US Department of Energy [DE-AC02-98CH10886]
FX We thank Babis Anastasiou and Christian Sturm for useful discussions. We
are grateful to Stefano Catani for helpful discussions and comments on
the manuscript. The work of D.deF. was partially supported by ANPCYT,
UBA-CyT and CONICET. D.deF. is grateful to the US Department of Energy
(Contract No. DE-AC02-98CH10886) for providing the facilities essential
for the completion of his work.
NR 27
TC 144
Z9 144
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
EI 1873-2445
J9 PHYS LETT B
JI Phys. Lett. B
PD APR 27
PY 2009
VL 674
IS 4-5
BP 291
EP 294
DI 10.1016/j.physletb.2009.03.033
PG 4
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 439JD
UT WOS:000265622500009
ER
PT J
AU Zhang, B
Chen, G
Liang, YL
Xu, P
AF Zhang, Bin
Chen, Gang
Liang, Yilin
Xu, Ping
TI Structural and electrochemical properties of LiNi0.5Mn0.5-xAlxO2 (x=0,
0.02, 0.05, 0.08, and 0.1) cathode materials for lithium-ion batteries
SO SOLID STATE IONICS
LA English
DT Article
DE LiNi0.5Mn0.5O2; Aluminum substitution; Layered structure; Cathode
material; Lithium ion battery
ID NICKEL MANGANESE OXIDES; LI-ION; COPRECIPITATION METHOD; COBALT
SUBSTITUTION; ELECTRODE MATERIALS; PERFORMANCE; BEHAVIOR; AL;
INTERCALATION; CELLS
AB Layered LiNi0.5Mn0.5-xAlxO2 (x = 0, 0.02, 0.05, 0.08, and 0.1) series cathode materials for lithium-ion batteries were synthesized by a combination technique of co-precipitation and solid-state reaction, and the structural, morphological, and electrochemical properties were examined by XRD, FT-IR, XPS, SEM, CV, EIS, and charge-discharge tests. It is proven that the aliovalent substitution of Al for Mn promoted the formation of LiNi0.5Mn0.5-xAlxO2 structures and induced an increase in the average oxidation number of Ni, thereby leading to the shrinkage of the lattice volume. Among the LiNi0.5Mn0.5-xAlxO2 materials, the material with x = 0.05 shows the best cyclability and rate ability, with discharge capacities of 219,169,155, and 129 mAh g(-1) at 10, 100, 200, and 400 MA g(-1) current density respectively. Cycled under 40 mA g(-1) in 2.8-4.6 V, LiNi0.5Mn0.45Al0.05O2 shows the highest discharge capacity of about 199 mAh g(-1) for the first cycle, and 179 mAh g(-1) after 40 cycles, with a capacity retention of 90%. EIS analyses of the electrode materials at pristine state and state after first charge to 4.6 V indicate that the observed higher current rate capability of LiNi0.5Mn0.45Al0.05O2 can be understood due to the better charge transfer kinetics. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Zhang, Bin; Chen, Gang; Liang, Yilin; Xu, Ping] Harbin Inst Technol, Dept Chem, Harbin 150001, Peoples R China.
[Xu, Ping] Los Alamos Natl Lab, C PCS, Los Alamos, NM 87545 USA.
RP Chen, G (reprint author), Harbin Inst Technol, Dept Chem, Harbin 150001, Peoples R China.
EM gchen@hit.edu.cn; pingxu1980@hotmail.com
RI Xu, Ping/I-1910-2013; zhou, yansong/J-8476-2013; Chen, Gang/B-5073-2016;
Zhou, Yansong/K-6291-2015
OI Xu, Ping/0000-0002-1516-4986; Zhou, Yansong/0000-0003-1369-8324
FU National Science Foundation of China [20571019]
FX This work was supported by the National Science Foundation of China
(Project No.20571019). The Project was sponsored by SRF for ROCS, SEM
and the Project-sponsored by SRF for ROCS, HIT. P. Xu thanks helpful
discussions with Dr. Darrick Williams and Dr. Hsing-Lin Wang about the
XRD.
NR 48
TC 23
Z9 26
U1 4
U2 54
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-2738
J9 SOLID STATE IONICS
JI Solid State Ion.
PD APR 27
PY 2009
VL 180
IS 4-5
BP 398
EP 404
DI 10.1016/j.ssi.2009.01.009
PG 7
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 443ED
UT WOS:000265892100017
ER
PT J
AU Riesen, R
Brightwell, R
Bridges, PG
Hudson, T
Maccabe, AB
Widener, PM
Ferreira, K
AF Riesen, Rolf
Brightwell, Ron
Bridges, Patrick G.
Hudson, Trammell
Maccabe, Arthur B.
Widener, Patrick M.
Ferreira, Kurt
TI Designing and implementing lightweight kernels for capability computing
SO CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE
LA English
DT Article
DE parallel computing; operating systems
ID PERFORMANCE; SUPPORT; MODEL
AB In the early 1990s, researchers at Sandia National Laboratories and the University of New Mexico began development of customized system software for massively parallel 'capability' computing platforms. These lightweight kernels have proven to be essential for delivering the full power of the underlying hardware to applications. This claim is underscored by the success of several supercomputers, including the Intel Paragon, Intel Accelerated Strategic Computing Initiative Red, and the Cray XT series of systems, each having established a new standard for high-performance computing upon introduction. In this paper, we describe our approach to lightweight compute node kernel design and discuss the design principles that have guided several generations of implementation and deployment. A broad strategy of operating system specialization has led to a focus on user-level resource management, deterministic behavior, and scalable system services. The relative importance of each of these areas has changed over the years in response to changes in applications and hardware and system architecture. We detail our approach and the associated principles, describe how our application of these principles has changed over time, and provide design and performance comparisons to contemporaneous supercomputing operating systems. Copyright (C) 2008 John Wiley & Sons, Ltd.
C1 [Bridges, Patrick G.; Maccabe, Arthur B.; Widener, Patrick M.] Univ New Mexico, Dept Comp Sci, Albuquerque, NM 87131 USA.
[Riesen, Rolf; Brightwell, Ron; Ferreira, Kurt] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Hudson, Trammell] OS Res, Washington, DC 20036 USA.
RP Bridges, PG (reprint author), Univ New Mexico, Dept Comp Sci, Albuquerque, NM 87131 USA.
EM bridges@cs.unm.edu
FU United States Department of Energy's National Nuclear Security
Administration [DE-AC04-94AL85000]
FX Contract/grant sponsor: United States Department of Energy's National
Nuclear Security Administration; contract/grant number:
DE-AC04-94AL85000
NR 35
TC 7
Z9 7
U1 0
U2 2
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 1532-0626
J9 CONCURR COMP-PRACT E
JI Concurr. Comput.-Pract. Exp.
PD APR 25
PY 2009
VL 21
IS 6
BP 793
EP 817
DI 10.1002/cpe.1361
PG 25
WC Computer Science, Software Engineering; Computer Science, Theory &
Methods
SC Computer Science
GA 428MM
UT WOS:000264852400004
ER
PT J
AU Easterling, DR
Wehner, MF
AF Easterling, David R.
Wehner, Michael F.
TI Is the climate warming or cooling?
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
AB Numerous websites, blogs and articles in the media have claimed that the climate is no longer warming, and is now cooling. Here we show that periods of no trend or even cooling of the globally averaged surface air temperature are found in the last 34 years of the observed record, and in climate model simulations of the 20(th) and 21(st) century forced with increasing greenhouse gases. We show that the climate over the 21(st) century can and likely will produce periods of a decade or two where the globally averaged surface air temperature shows no trend or even slight cooling in the presence of longer-term warming. Citation: Easterling, D. R., and M. F. Wehner (2009), Is the climate warming or cooling?, Geophys. Res. Lett., 36, L08706, doi: 10.1029/2009GL037810.
C1 [Easterling, David R.] NOAA, Natl Climat Data Ctr, Asheville, NC 28801 USA.
[Wehner, Michael F.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Easterling, DR (reprint author), NOAA, Natl Climat Data Ctr, 151 Pattom Ave, Asheville, NC 28801 USA.
EM david.easterling@noaa.gov; mfwehner@lbl.gov
FU Climate Change Prediction Program; Office of Science; U.S. Department of
Energy; Office of Biological and Environmental Sciences; U.S. Department
of Energy [DE-AI02-96ER62276]
FX We acknowledge the modeling groups, the Program for Climate Model
Diagnosis and Intercomparison (PCMDI) and the World Climate Research
Program's (WCRP) Working Group on Coupled Modeling (WGCM) for their
roles in making available the WCRP CMIP3 multi-model dataset. Support of
this dataset and support for this analysis is provided by the Climate
Change Prediction Program, Office of Science, and the U.S. Department of
Energy. Additional support to DRE was provided by the Office of
Biological and Environmental Sciences, U.S. Department of Energy under
Interagency Agreement DE-AI02-96ER62276.
NR 6
TC 193
Z9 210
U1 7
U2 78
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD APR 25
PY 2009
VL 36
AR L08706
DI 10.1029/2009GL037810
PG 3
WC Geosciences, Multidisciplinary
SC Geology
GA 438CT
UT WOS:000265534200004
ER
PT J
AU Daniel, WB
Ecke, RE
Subramanian, G
Koch, DL
AF Daniel, W. Brent
Ecke, Robert E.
Subramanian, G.
Koch, Donald L.
TI Clusters of sedimenting high-Reynolds-number particles
SO JOURNAL OF FLUID MECHANICS
LA English
DT Article
ID DRIVEN GRAVITY CURRENTS; NEWTONIAN FLUID; SPHERE; TRANSITION; WAKE
C1 [Subramanian, G.] Jawaharlal Nehru Ctr Adv Sci Res, Engn Mech Unit, Bangalore 560064, Karnataka, India.
[Daniel, W. Brent; Ecke, Robert E.] Los Alamos Natl Lab, Ctr Nonlinear Studies & Condensed Matter & Therma, Los Alamos, NM 87545 USA.
[Koch, Donald L.] Cornell Univ, Sch Chem & Biomol Engn, Ithaca, NY 14853 USA.
RP Subramanian, G (reprint author), Jawaharlal Nehru Ctr Adv Sci Res, Engn Mech Unit, Bangalore 560064, Karnataka, India.
EM sganesh@jncasr.ac.in
OI Ecke, Robert/0000-0001-7772-5876
FU NSF [CBET-0730579]
FX This work was Supported by NSF grant CBET-0730579.
NR 19
TC 6
Z9 6
U1 1
U2 7
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0022-1120
J9 J FLUID MECH
JI J. Fluid Mech.
PD APR 25
PY 2009
VL 625
BP 371
EP 385
DI 10.1017/S002211200900620X
PG 15
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 441WO
UT WOS:000265801400014
ER
PT J
AU Fan, GJ
Li, L
Yang, B
Choo, H
Liaw, PK
Saleh, TA
Clausen, B
Brown, DW
AF Fan, G. J.
Li, L.
Yang, Bin
Choo, H.
Liaw, P. K.
Saleh, T. A.
Clausen, B.
Brown, D. W.
TI In situ neutron-diffraction study of tensile deformation of a bulk
nanocrystalline alloy
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE Plastic deformation; Nanocrystalline materials; Neutron-diffraction
ID SEVERE PLASTIC-DEFORMATION; NANOSTRUCTURED MATERIALS; GRAIN-GROWTH;
THIN-FILMS; STRESS; BEHAVIOR; NICKEL; TEMPERATURE; DUCTILITY; STRENGTH
AB In situ neutron-diffraction technique has been employed to study the uniaxial tensile deformation of a bulk nanocrystalline Ni-Fe alloy. In contrast to an increase in the full-width half-maximum (FWHM) of the neutron-diffraction patterns for the coarse-grained Ni, the FWHM for the nanocrystalline Ni-Fe alloy decreases with increasing the plastic strain, epsilon(p). The deformation with epsilon(p) < 1.5% did not introduce a residual lattice strain and a texture in the nanocrystalline Ni-Fe alloy, which were otherwise developed in the coarse-grained Ni. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Fan, G. J.; Li, L.; Choo, H.; Liaw, P. K.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Yang, Bin] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China.
[Saleh, T. A.; Clausen, B.; Brown, D. W.] Los Alamos Natl Lab, Los Alamos Neutron Sci Ctr, Los Alamos, NM 87545 USA.
RP Fan, GJ (reprint author), Smith Int Inc, MegaDiamond, 275 W 2230 N, Provo, UT 84604 USA.
EM gfan@smith.com
RI Choo, Hahn/A-5494-2009; Clausen, Bjorn/B-3618-2015;
OI Choo, Hahn/0000-0002-8006-8907; Clausen, Bjorn/0000-0003-3906-846X;
Saleh, Tarik/0000-0003-2108-4293
FU National Science Foundation (NSF); International Materials Institutes
(IMI) Program [DMR-0231320]
FX This work was supported by the National Science Foundation (NSF)
International Materials Institutes (IMI) Program (DMR-0231320). The
authors thank the valuable discussion with Prof. Y.D. Wang of
Northeastern University, China.
NR 30
TC 8
Z9 8
U1 1
U2 13
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
EI 1873-4936
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD APR 25
PY 2009
VL 506
IS 1-2
BP 187
EP 190
DI 10.1016/j.msea.2008.11.054
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 425EY
UT WOS:000264621000028
ER
PT J
AU Abazov, VM
Abbott, B
Abolins, M
Acharya, BS
Adams, M
Adams, T
Aguilo, E
Ahsan, M
Alexeev, GD
Alkhazov, G
Alton, A
Alverson, G
Alves, GA
Anastasoaie, M
Ancu, LS
Andeen, T
Andrieu, B
Anzelc, MS
Aoki, M
Arnoud, Y
Arov, M
Arthaud, M
Askew, A
Asman, B
Jesus, ACSA
Atramentov, O
Avila, C
Badaud, F
Bagby, L
Baldin, B
Bandurin, DV
Banerjee, P
Banerjee, S
Barberis, E
Barfuss, AF
Bargassa, P
Baringer, P
Barreto, J
Bartlett, JF
Bassler, U
Bauer, D
Beale, S
Bean, A
Begalli, M
Begel, M
Belanger-Champagne, C
Bellantoni, L
Bellavance, A
Benitez, JA
Beri, SB
Bernardi, G
Bernhard, R
Bertram, I
Besancon, M
Beuselinck, R
Bezzubov, VA
Bhat, PC
Bhatnagar, V
Blazey, G
Blekman, F
Blessing, S
Bloom, K
Boehnlein, A
Boline, D
Bolton, TA
Boos, EE
Borissov, G
Bose, T
Brandt, A
Brock, R
Brooijmans, G
Bross, A
Brown, D
Bu, XB
Buchanan, NJ
Buchholz, D
Buehler, M
Buescher, V
Bunichev, V
Burdin, S
Burnett, TH
Buszello, CP
Calfayan, P
Calvet, S
Cammin, J
Carrasco-Lizarraga, MA
Carrera, E
Carvalho, W
Casey, BCK
Castilla-Valdez, H
Chakrabarti, S
Chakraborty, D
Chan, KM
Chandra, A
Cheu, E
Cho, DK
Choi, S
Choudhary, B
Christofek, L
Christoudias, T
Cihangir, S
Claes, D
Clutter, J
Cooke, M
Cooper, WE
Corcoran, M
Couderc, F
Cousinou, MC
Crepe-Renaudin, S
Cuplov, V
Cutts, D
Cwiok, M
da Motta, H
Das, A
Davies, G
De, K
de Jong, SJ
De La Cruz-Burelo, E
Martins, CDO
De Vaughan, K
Deliot, F
Demarteau, M
Demina, R
Denisov, D
Denisov, SP
Desai, S
Diehl, HT
Diesburg, M
Dominguez, A
Dorland, T
Dubey, A
Dudko, LV
Duflot, L
Dugad, SR
Duggan, D
Duperrin, A
Dutt, S
Dyer, J
Dyshkant, A
Eads, M
Edmunds, D
Ellison, J
Elvira, VD
Enari, Y
Eno, S
Ermolov, P
Evans, H
Evdokimov, A
Evdokimov, VN
Ferapontov, AV
Ferbel, T
Fiedler, F
Filthaut, F
Fisher, W
Fisk, HE
Fortner, M
Fox, H
Fu, S
Fuess, S
Gadfort, T
Galea, CF
Garcia, C
Garcia-Bellido, A
Gavrilov, V
Gay, P
Geist, W
Geng, W
Gerber, CE
Gershtein, Y
Gillberg, D
Ginther, G
Gomez, B
Goussiou, A
Grannis, PD
Greenlee, H
Greenwood, ZD
Gregores, EM
Grenier, G
Gris, P
Grivaz, JF
Grohsjean, A
Grunendahl, S
Grunewald, MW
Guo, F
Guo, J
Gutierrez, G
Gutierrez, P
Haas, A
Hadley, NJ
Haefner, P
Hagopian, S
Haley, J
Hall, I
Hall, RE
Han, L
Harder, K
Harel, A
Hauptman, JM
Hays, J
Hebbeker, T
Hedin, D
Hegeman, JG
Heinson, AP
Heintz, U
Hensel, C
Herner, K
Hesketh, G
Hildreth, MD
Hirosky, R
Hoang, T
Hobbs, JD
Hoeneisen, B
Hohlfeld, M
Hossain, S
Houben, P
Hu, Y
Hubacek, Z
Hynek, V
Iashvili, I
Illingworth, R
Ito, AS
Jabeen, S
Jaffre, M
Jain, S
Jakobs, K
Jarvis, C
Jesik, R
Johns, K
Johnson, C
Johnson, M
Johnston, D
Jonckheere, A
Jonsson, P
Juste, A
Kajfasz, E
Karmanov, D
Kasper, PA
Katsanos, I
Kaushik, V
Kehoe, R
Kermiche, S
Khalatyan, N
Khanov, A
Kharchilava, A
Kharzheev, YN
Khatidze, D
Kim, TJ
Kirby, MH
Kirsch, M
Klima, B
Kohli, JM
Konrath, JP
Kozelov, AV
Kraus, J
Kuhl, T
Kumar, A
Kupco, A
Kurca, T
Kuzmin, VA
Kvita, J
Lacroix, F
Lam, D
Lammers, S
Landsberg, G
Lebrun, P
Lee, WM
Leflat, A
Lellouch, J
Li, J
Li, L
Li, QZ
Lietti, SM
Lim, JK
Lima, JGR
Lincoln, D
Linnemann, J
Lipaev, VV
Lipton, R
Liu, Y
Liu, Z
Lobodenko, A
Lokajicek, M
Love, P
Lubatti, HJ
Luna-Garcia, R
Lyon, AL
Maciel, AKA
Mackin, D
Madaras, RJ
Mattig, P
Magerkurth, A
Mal, PK
Malbouisson, HB
Malik, S
Malyshev, VL
Maravin, Y
Martin, B
McCarthy, R
Meijer, MM
Melnitchouk, A
Mendoza, L
Mercadante, PG
Merkin, M
Merritt, KW
Meyer, A
Meyer, J
Mitrevski, J
Mommsen, RK
Mondal, NK
Moore, RW
Moulik, T
Muanza, GS
Mulhearn, M
Mundal, O
Mundim, L
Nagy, E
Naimuddin, M
Narain, M
Neal, HA
Negret, JP
Neustroev, P
Nilsen, H
Nogima, H
Novaes, SF
Nunnemann, T
O'Neil, DC
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AF Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
Adams, T.
Aguilo, E.
Ahsan, M.
Alexeev, G. D.
Alkhazov, G.
Alton, A.
Alverson, G.
Alves, G. A.
Anastasoaie, M.
Ancu, L. S.
Andeen, T.
Andrieu, B.
Anzelc, M. S.
Aoki, M.
Arnoud, Y.
Arov, M.
Arthaud, M.
Askew, A.
Asman, B.
Jesus, A. C. S. Assis
Atramentov, O.
Avila, C.
Badaud, F.
Bagby, L.
Baldin, B.
Bandurin, D. V.
Banerjee, P.
Banerjee, S.
Barberis, E.
Barfuss, A. -F.
Bargassa, P.
Baringer, P.
Barreto, J.
Bartlett, J. F.
Bassler, U.
Bauer, D.
Beale, S.
Bean, A.
Begalli, M.
Begel, M.
Belanger-Champagne, C.
Bellantoni, L.
Bellavance, A.
Benitez, J. A.
Beri, S. B.
Bernardi, G.
Bernhard, R.
Bertram, I.
Besancon, M.
Beuselinck, R.
Bezzubov, V. A.
Bhat, P. C.
Bhatnagar, V.
Blazey, G.
Blekman, F.
Blessing, S.
Bloom, K.
Boehnlein, A.
Boline, D.
Bolton, T. A.
Boos, E. E.
Borissov, G.
Bose, T.
Brandt, A.
Brock, R.
Brooijmans, G.
Bross, A.
Brown, D.
Bu, X. B.
Buchanan, N. J.
Buchholz, D.
Buehler, M.
Buescher, V.
Bunichev, V.
Burdin, S.
Burnett, T. H.
Buszello, C. P.
Calfayan, P.
Calvet, S.
Cammin, J.
Carrasco-Lizarraga, M. A.
Carrera, E.
Carvalho, W.
Casey, B. C. K.
Castilla-Valdez, H.
Chakrabarti, S.
Chakraborty, D.
Chan, K. M.
Chandra, A.
Cheu, E.
Cho, D. K.
Choi, S.
Choudhary, B.
Christofek, L.
Christoudias, T.
Cihangir, S.
Claes, D.
Clutter, J.
Cooke, M.
Cooper, W. E.
Corcoran, M.
Couderc, F.
Cousinou, M. -C.
Crepe-Renaudin, S.
Cuplov, V.
Cutts, D.
Cwiok, M.
da Motta, H.
Das, A.
Davies, G.
De, K.
de Jong, S. J.
De La Cruz-Burelo, E.
Martins, C. De Oliveira
De Vaughan, K.
Deliot, F.
Demarteau, M.
Demina, R.
Denisov, D.
Denisov, S. P.
Desai, S.
Diehl, H. T.
Diesburg, M.
Dominguez, A.
Dorland, T.
Dubey, A.
Dudko, L. V.
Duflot, L.
Dugad, S. R.
Duggan, D.
Duperrin, A.
Dutt, S.
Dyer, J.
Dyshkant, A.
Eads, M.
Edmunds, D.
Ellison, J.
Elvira, V. D.
Enari, Y.
Eno, S.
Ermolov, P.
Evans, H.
Evdokimov, A.
Evdokimov, V. N.
Ferapontov, A. V.
Ferbel, T.
Fiedler, F.
Filthaut, F.
Fisher, W.
Fisk, H. E.
Fortner, M.
Fox, H.
Fu, S.
Fuess, S.
Gadfort, T.
Galea, C. F.
Garcia, C.
Garcia-Bellido, A.
Gavrilov, V.
Gay, P.
Geist, W.
Geng, W.
Gerber, C. E.
Gershtein, Y.
Gillberg, D.
Ginther, G.
Gomez, B.
Goussiou, A.
Grannis, P. D.
Greenlee, H.
Greenwood, Z. D.
Gregores, E. M.
Grenier, G.
Gris, Ph.
Grivaz, J. -F.
Grohsjean, A.
Gruenendahl, S.
Gruenewald, M. W.
Guo, F.
Guo, J.
Gutierrez, G.
Gutierrez, P.
Haas, A.
Hadley, N. J.
Haefner, P.
Hagopian, S.
Haley, J.
Hall, I.
Hall, R. E.
Han, L.
Harder, K.
Harel, A.
Hauptman, J. M.
Hays, J.
Hebbeker, T.
Hedin, D.
Hegeman, J. G.
Heinson, A. P.
Heintz, U.
Hensel, C.
Herner, K.
Hesketh, G.
Hildreth, M. D.
Hirosky, R.
Hoang, T.
Hobbs, J. D.
Hoeneisen, B.
Hohlfeld, M.
Hossain, S.
Houben, P.
Hu, Y.
Hubacek, Z.
Hynek, V.
Iashvili, I.
Illingworth, R.
Ito, A. S.
Jabeen, S.
Jaffre, M.
Jain, S.
Jakobs, K.
Jarvis, C.
Jesik, R.
Johns, K.
Johnson, C.
Johnson, M.
Johnston, D.
Jonckheere, A.
Jonsson, P.
Juste, A.
Kajfasz, E.
Karmanov, D.
Kasper, P. A.
Katsanos, I.
Kaushik, V.
Kehoe, R.
Kermiche, S.
Khalatyan, N.
Khanov, A.
Kharchilava, A.
Kharzheev, Y. N.
Khatidze, D.
Kim, T. J.
Kirby, M. H.
Kirsch, M.
Klima, B.
Kohli, J. M.
Konrath, J. -P.
Kozelov, A. V.
Kraus, J.
Kuhl, T.
Kumar, A.
Kupco, A.
Kurca, T.
Kuzmin, V. A.
Kvita, J.
Lacroix, F.
Lam, D.
Lammers, S.
Landsberg, G.
Lebrun, P.
Lee, W. M.
Leflat, A.
Lellouch, J.
Li, J.
Li, L.
Li, Q. Z.
Lietti, S. M.
Lim, J. K.
Lima, J. G. R.
Lincoln, D.
Linnemann, J.
Lipaev, V. V.
Lipton, R.
Liu, Y.
Liu, Z.
Lobodenko, A.
Lokajicek, M.
Love, P.
Lubatti, H. J.
Luna-Garcia, R.
Lyon, A. L.
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Mackin, D.
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Yin, H.
Yip, K.
Yoo, H. D.
Youn, S. W.
Yu, J.
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Zelitch, S.
Zhao, T.
Zhou, B.
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Zverev, E. G.
CA D0 Collabroation
TI Evidence of WW and WZ Production with lepton plus jets Final States in
pp Collisions at root s=1.96 TeV
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID BOSON
AB We present first evidence for WW+WZ production in lepton+jets final states at a hadron collider. The data correspond to 1.07 fb(-1) of integrated luminosity collected with the D0 detector at the Fermilab Tevatron in pp collisions at root s=1.96 TeV. The observed cross section for WW+WZ production is 20.2 +/- 4.5 pb, consistent with the standard model and more precise than previous measurements in fully leptonic final states. The probability that background fluctuations alone produce this excess is < 5.4x10(-6), which corresponds to a significance of 4.4 standard deviations.
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RP Abazov, VM (reprint author), Univ Buenos Aires, Buenos Aires, DF, Argentina.
RI Mercadante, Pedro/K-1918-2012; Mundim, Luiz/A-1291-2012; Yip,
Kin/D-6860-2013; Fisher, Wade/N-4491-2013; Shivpuri, R K/A-5848-2010;
Gutierrez, Phillip/C-1161-2011; bu, xuebing/D-1121-2012; Leflat,
Alexander/D-7284-2012; Dudko, Lev/D-7127-2012; Perfilov,
Maxim/E-1064-2012; Boos, Eduard/D-9748-2012; Merkin,
Mikhail/D-6809-2012; Novaes, Sergio/D-3532-2012; De,
Kaushik/N-1953-2013; Ancu, Lucian Stefan/F-1812-2010; Alves,
Gilvan/C-4007-2013; Deliot, Frederic/F-3321-2014; Sharyy,
Viatcheslav/F-9057-2014; Lokajicek, Milos/G-7800-2014; Kupco,
Alexander/G-9713-2014; Kozelov, Alexander/J-3812-2014; Christoudias,
Theodoros/E-7305-2015; KIM, Tae Jeong/P-7848-2015; Guo, Jun/O-5202-2015;
Sznajder, Andre/L-1621-2016; Li, Liang/O-1107-2015
OI Mundim, Luiz/0000-0001-9964-7805; Yip, Kin/0000-0002-8576-4311; Dudko,
Lev/0000-0002-4462-3192; Novaes, Sergio/0000-0003-0471-8549; De,
Kaushik/0000-0002-5647-4489; Ancu, Lucian Stefan/0000-0001-5068-6723;
Sharyy, Viatcheslav/0000-0002-7161-2616; Christoudias,
Theodoros/0000-0001-9050-3880; KIM, Tae Jeong/0000-0001-8336-2434; Guo,
Jun/0000-0001-8125-9433; Sznajder, Andre/0000-0001-6998-1108; Li,
Liang/0000-0001-6411-6107
FU DOE; NSF ( USA); CEA; FASI; Rosatom; RFBR ( Russia); CNPq; FAPERJ;
FAPESP; FUNDUNESP ( Brazil); DAE; DST ( India); Colciencias ( Colombia);
CONACyT ( Mexico); KRF; KOSEF ( Korea); CONICET; UBACyT ( Argentina);
FOM ( The Netherlands); STFC; MSMT; GACR ( Czech Republic); CRC Program;
CFI; NSERC; WestGrid Project ( Canada); BMBF; DFG ( Germany); SFI (
Ireland); The Swedish Research Council ( Sweden); CAS; CNSF ( China);
Alexander von Humboldt Foundation ( Germany); [CNRS/IN2P3]
FX We thank the staffs at Fermilab and collaborating institutions, and
acknowledge support from the DOE and NSF ( USA); CEA and CNRS/IN2P3 (
France); FASI, Rosatom and RFBR ( Russia); CNPq, FAPERJ, FAPESP and
FUNDUNESP ( Brazil); DAE and DST ( India); Colciencias ( Colombia);
CONACyT ( Mexico); KRF and KOSEF ( Korea); CONICET and UBACyT (
Argentina); FOM ( The Netherlands); STFC ( United Kingdom); MSMT and
GACR ( Czech Republic); CRC Program, CFI, NSERC and WestGrid Project (
Canada); BMBF and DFG ( Germany); SFI ( Ireland); The Swedish Research
Council ( Sweden); CAS and CNSF ( China); and the Alexander von Humboldt
Foundation ( Germany).
NR 28
TC 19
Z9 19
U1 0
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 24
PY 2009
VL 102
IS 16
AR 161801
DI 10.1103/PhysRevLett.102.161801
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 437IC
UT WOS:000265479300012
ER
PT J
AU Abazov, VM
Abbott, B
Abolins, M
Acharya, BS
Adams, M
Adams, T
Aguilo, E
Ahsan, M
Alexeev, GD
Alkhazov, G
Alton, A
Alverson, G
Alves, GA
Anastasoaie, M
Ancu, LS
Andeen, T
Andrieu, B
Anzelc, MS
Aoki, M
Arnoud, Y
Arov, M
Arthaud, M
Askew, A
Asman, B
Jesus, ACSA
Atramentov, O
Avila, C
Badaud, F
Bagby, L
Baldin, B
Bandurin, DV
Banerjee, P
Banerjee, S
Barberis, E
Barfuss, AF
Bargassa, P
Baringer, P
Barreto, J
Bartlett, JF
Bassler, U
Bauer, D
Beale, S
Bean, A
Begalli, M
Begel, M
Belanger-Champagne, C
Bellantoni, L
Bellavance, A
Benitez, JA
Beri, SB
Bernardi, G
Bernhard, R
Bertram, I
Besancon, M
Beuselinck, R
Bezzubov, VA
Bhat, PC
Bhatnagar, V
Biscarat, C
Blazey, G
Blekman, F
Blessing, S
Bloom, K
Boehnlein, A
Boline, D
Bolton, TA
Boos, EE
Borissov, G
Bose, T
Brandt, A
Brock, R
Brooijmans, G
Bross, A
Brown, D
Bu, XB
Buchanan, NJ
Buchholz, D
Buehler, M
Buescher, V
Bunichev, V
Burdin, S
Burnett, TH
Buszello, CP
Butler, JM
Calfayan, P
Calvet, S
Cammin, J
Carrasco-Lizarraga, MA
Carrera, E
Carvalho, W
Casey, BCK
Castilla-Valdez, H
Chakrabarti, S
Chakraborty, D
Chan, KM
Chandra, A
Cheu, E
Chevallier, F
Cho, DK
Choi, S
Choudhary, B
Christofek, L
Christoudias, T
Cihangir, S
Claes, D
Clutter, J
Cooke, M
Cooper, WE
Corcoran, M
Couderc, F
Cousinou, MC
Crepe-Renaudin, S
Cuplov, V
Cutts, D
Cwiok, M
da Motta, H
Das, A
Davies, G
De, K
de Jong, SJ
De La Cruz-Burelo, E
Martins, CDO
De Vaughan, K
Deliot, F
Demarteau, M
Demina, R
Denisov, D
Denisov, SP
Desai, S
Diehl, HT
Diesburg, M
Dominguez, A
Dorland, T
Dubey, A
Dudko, LV
Duflot, L
Dugad, SR
Duggan, D
Duperrin, A
Dyer, J
Dyshkant, A
Eads, M
Edmunds, D
Ellison, J
Elvira, VD
Enari, Y
Eno, S
Ermolov, P
Evans, H
Evdokimov, A
Evdokimov, VN
Ferapontov, AV
Ferbel, T
Fiedler, F
Filthaut, F
Fisher, W
Fisk, HE
Fortner, M
Fox, H
Fu, S
Fuess, S
Gadfort, T
Galea, CF
Garcia, C
Garcia-Bellido, A
Gavrilov, V
Gay, P
Geist, W
Geng, W
Gerber, CE
Gershtein, Y
Gillberg, D
Ginther, G
Gomez, B
Goussiou, A
Grannis, PD
Greenlee, H
Greenwood, ZD
Gregores, EM
Grenier, G
Gris, P
Grivaz, JF
Grohsjean, A
Grunendahl, S
Grunewald, MW
Guo, F
Guo, J
Gutierrez, G
Gutierrez, P
Haas, A
Hadley, NJ
Haefner, P
Hagopian, S
Haley, J
Hall, I
Hall, RE
Han, L
Harder, K
Harel, A
Hauptman, JM
Hays, J
Hebbeker, T
Hedin, D
Hegeman, JG
Heinson, AP
Heintz, U
Hensel, C
Herner, K
Hesketh, G
Hildreth, MD
Hirosky, R
Hobbs, JD
Hoeneisen, B
Hohlfeld, M
Hossain, S
Houben, P
Hu, Y
Hubacek, Z
Hynek, V
Iashvili, I
Illingworth, R
Ito, AS
Jabeen, S
Jaffre, M
Jain, S
Jakobs, K
Jarvis, C
Jesik, R
Johns, K
Johnson, C
Johnson, M
Johnston, D
Jonckheere, A
Jonsson, P
Juste, A
Kajfasz, E
Karmanov, D
Kasper, PA
Katsanos, I
Kau, D
Kaushik, V
Kehoe, R
Kermiche, S
Khalatyan, N
Khanov, A
Kharchilava, A
Kharzheev, YM
Khatidze, D
Kim, TJ
Kirby, MH
Kirsch, M
Klima, B
Kohli, JM
Konrath, JP
Kozelov, AV
Kraus, J
Kuhl, T
Kumar, A
Kupco, A
Kurca, T
Kuzmin, VA
Kvita, J
Lacroix, F
Lam, D
Lammers, S
Landsberg, G
Lebrun, P
Lee, WM
Leflat, A
Lellouch, J
Li, J
Li, L
Li, QZ
Lietti, SM
Lim, JK
Lima, JGR
Lincoln, D
Linnemann, J
Lipaev, VV
Lipton, R
Liu, Y
Liu, Z
Lobodenko, A
Lokajicek, M
Love, P
Lubatti, HJ
Luna-Garcia, R
Lyon, AL
Maciel, AKA
Mackin, D
Madaras, RJ
Mattig, P
Magass, C
Magerkurth, A
Mal, PK
Malbouisson, HB
Malik, S
Malyshev, VL
Maravin, Y
Martin, B
McCarthy, R
Meijer, MM
Melnitchouk, A
Mendoza, L
Mercadante, PG
Merkin, M
Merritt, KW
Meyer, A
Meyer, J
Mitrevski, J
Mommsen, RK
Mondal, NK
Moore, RW
Moulik, T
Muanza, GS
Mulhearn, M
Mundal, O
Mundim, L
Nagy, E
Naimuddin, M
Narain, M
Naumann, NA
Neal, HA
Negret, JP
Neustroev, P
Nilsen, H
Nogima, H
Novaes, SF
Nunnemann, T
O'Dell, V
O'Neil, DC
Obrant, G
Ochando, C
Onoprienko, D
Oshima, N
Osman, N
Osta, J
Otec, R
Garzon, GJOY
Owen, M
Padley, P
Pangilinan, M
Parashar, N
Park, SJ
Park, SK
Parsons, J
Partridge, R
Parua, N
Patwa, A
Pawloski, G
Penning, B
Perfilov, M
Peters, K
Peters, Y
Petroff, P
Petteni, M
Piegaia, R
Piper, J
Pleier, MA
Podesta-Lerma, PLM
Podstavkov, VM
Pogorelov, Y
Pol, ME
Polozov, P
Pope, BG
Popov, AV
Potter, C
da Silva, WLP
Prosper, HB
Protopopescu, S
Qian, J
Quadt, A
Quinn, B
Rakitine, A
Rangel, MS
Ranjan, K
Ratoff, PN
Renkel, P
Rich, P
Rijssenbeek, M
Ripp-Baudot, I
Rizatdinova, F
Robinson, S
Rodrigues, RF
Rominsky, M
Royon, C
Rubinov, P
Ruchti, R
Safronov, G
Sajot, G
Sanchez-Hernandez, A
Sanders, MP
Sanghi, B
Savage, G
Sawyer, L
Scanlon, T
Schaile, D
Schamberger, RD
Scheglov, Y
Schellman, H
Schliephake, T
Schlobohm, S
Schwanenberger, C
Schwartzman, A
Schwienhorst, R
Sekaric, J
Severini, H
Shabalina, E
Shamim, M
Shary, V
Shchukin, AA
Shivpuri, RK
Siccardi, V
Simak, V
Sirotenko, V
Skubic, P
Slattery, P
Smirnov, D
Snow, GR
Snow, J
Snyder, S
Soldner-Rembold, S
Sonnenschein, L
Sopczak, A
Sosebee, M
Soustruznik, K
Spurlock, B
Stark, J
Stolin, V
Stoyanova, DA
Strandberg, J
Strandberg, S
Strang, MA
Strauss, E
Strauss, M
Strohmer, R
Strom, D
Stutte, L
Sumowidagdo, S
Svoisky, P
Sznajder, A
Tanasijczuk, A
Taylor, W
Tiller, B
Tissandier, F
Titov, M
Tokmenin, VV
Torchiani, I
Tsybychev, D
Tuchming, B
Tully, C
Tuts, PM
Unalan, R
Uvarov, L
Uvarov, S
Uzunyan, S
Vachon, B
van den Berg, PJ
Van Kooten, R
van Leeuwen, WM
Varelas, N
Varnes, EW
Vasilyev, IA
Verdier, P
Vertogradov, LS
Verzocchi, M
Vilanova, D
Villeneuve-Seguier, F
Vint, P
Vokac, P
Voutilainen, M
Wagner, R
Wahl, HD
Wang, MHLS
Warchol, J
Watts, G
Wayne, M
Weber, G
Weber, M
Welty-Rieger, L
Wenger, A
Wermes, N
Wetstein, M
White, A
Wicke, D
Williams, M
Wilson, GW
Wimpenny, SJ
Wobisch, M
Wood, DR
Wyatt, TR
Xie, Y
Xu, C
Yacoob, S
Yamada, R
Yang, WC
Yasuda, T
Yatsunenko, YA
Yin, H
Yip, K
Yoo, HD
Youn, SW
Yu, J
Zeitnitz, C
Zelitch, S
Zhao, T
Zhou, B
Zhu, J
Zielinski, M
Zieminska, D
Zieminski, A
Zivkovic, L
Zutshi, V
Zverev, EG
AF Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
Adams, T.
Aguilo, E.
Ahsan, M.
Alexeev, G. D.
Alkhazov, G.
Alton, A.
Alverson, G.
Alves, G. A.
Anastasoaie, M.
Ancu, L. S.
Andeen, T.
Andrieu, B.
Anzelc, M. S.
Aoki, M.
Arnoud, Y.
Arov, M.
Arthaud, M.
Askew, A.
Asman, B.
Jesus, A. C. S. Assis
Atramentov, O.
Avila, C.
Badaud, F.
Bagby, L.
Baldin, B.
Bandurin, D. V.
Banerjee, P.
Banerjee, S.
Barberis, E.
Barfuss, A. -F.
Bargassa, P.
Baringer, P.
Barreto, J.
Bartlett, J. F.
Bassler, U.
Bauer, D.
Beale, S.
Bean, A.
Begalli, M.
Begel, M.
Belanger-Champagne, C.
Bellantoni, L.
Bellavance, A.
Benitez, J. A.
Beri, S. B.
Bernardi, G.
Bernhard, R.
Bertram, I.
Besancon, M.
Beuselinck, R.
Bezzubov, V. A.
Bhat, P. C.
Bhatnagar, V.
Biscarat, C.
Blazey, G.
Blekman, F.
Blessing, S.
Bloom, K.
Boehnlein, A.
Boline, D.
Bolton, T. A.
Boos, E. E.
Borissov, G.
Bose, T.
Brandt, A.
Brock, R.
Brooijmans, G.
Bross, A.
Brown, D.
Bu, X. B.
Buchanan, N. J.
Buchholz, D.
Buehler, M.
Buescher, V.
Bunichev, V.
Burdin, S.
Burnett, T. H.
Buszello, C. P.
Butler, J. M.
Calfayan, P.
Calvet, S.
Cammin, J.
Carrasco-Lizarraga, M. A.
Carrera, E.
Carvalho, W.
Casey, B. C. K.
Castilla-Valdez, H.
Chakrabarti, S.
Chakraborty, D.
Chan, K. M.
Chandra, A.
Cheu, E.
Chevallier, F.
Cho, D. K.
Choi, S.
Choudhary, B.
Christofek, L.
Christoudias, T.
Cihangir, S.
Claes, D.
Clutter, J.
Cooke, M.
Cooper, W. E.
Corcoran, M.
Couderc, F.
Cousinou, M. -C.
Crepe-Renaudin, S.
Cuplov, V.
Cutts, D.
Cwiok, M.
da Motta, H.
Das, A.
Davies, G.
De, K.
de Jong, S. J.
De La Cruz-Burelo, E.
Martins, C. De Oliveira
De Vaughan, K.
Deliot, F.
Demarteau, M.
Demina, R.
Denisov, D.
Denisov, S. P.
Desai, S.
Diehl, H. T.
Diesburg, M.
Dominguez, A.
Dorland, T.
Dubey, A.
Dudko, L. V.
Duflot, L.
Dugad, S. R.
Duggan, D.
Duperrin, A.
Dyer, J.
Dyshkant, A.
Eads, M.
Edmunds, D.
Ellison, J.
Elvira, V. D.
Enari, Y.
Eno, S.
Ermolov, P.
Evans, H.
Evdokimov, A.
Evdokimov, V. N.
Ferapontov, A. V.
Ferbel, T.
Fiedler, F.
Filthaut, F.
Fisher, W.
Fisk, H. E.
Fortner, M.
Fox, H.
Fu, S.
Fuess, S.
Gadfort, T.
Galea, C. F.
Garcia, C.
Garcia-Bellido, A.
Gavrilov, V.
Gay, P.
Geist, W.
Geng, W.
Gerber, C. E.
Gershtein, Y.
Gillberg, D.
Ginther, G.
Gomez, B.
Goussiou, A.
Grannis, P. D.
Greenlee, H.
Greenwood, Z. D.
Gregores, E. M.
Grenier, G.
Gris, Ph.
Grivaz, J. -F.
Grohsjean, A.
Gruenendahl, S.
Gruenewald, M. W.
Guo, F.
Guo, J.
Gutierrez, G.
Gutierrez, P.
Haas, A.
Hadley, N. J.
Haefner, P.
Hagopian, S.
Haley, J.
Hall, I.
Hall, R. E.
Han, L.
Harder, K.
Harel, A.
Hauptman, J. M.
Hays, J.
Hebbeker, T.
Hedin, D.
Hegeman, J. G.
Heinson, A. P.
Heintz, U.
Hensel, C.
Herner, K.
Hesketh, G.
Hildreth, M. D.
Hirosky, R.
Hobbs, J. D.
Hoeneisen, B.
Hohlfeld, M.
Hossain, S.
Houben, P.
Hu, Y.
Hubacek, Z.
Hynek, V.
Iashvili, I.
Illingworth, R.
Ito, A. S.
Jabeen, S.
Jaffre, M.
Jain, S.
Jakobs, K.
Jarvis, C.
Jesik, R.
Johns, K.
Johnson, C.
Johnson, M.
Johnston, D.
Jonckheere, A.
Jonsson, P.
Juste, A.
Kajfasz, E.
Karmanov, D.
Kasper, P. A.
Katsanos, I.
Kau, D.
Kaushik, V.
Kehoe, R.
Kermiche, S.
Khalatyan, N.
Khanov, A.
Kharchilava, A.
Kharzheev, Y. M.
Khatidze, D.
Kim, T. J.
Kirby, M. H.
Kirsch, M.
Klima, B.
Kohli, J. M.
Konrath, J. -P.
Kozelov, A. V.
Kraus, J.
Kuhl, T.
Kumar, A.
Kupco, A.
Kurca, T.
Kuzmin, V. A.
Kvita, J.
Lacroix, F.
Lam, D.
Lammers, S.
Landsberg, G.
Lebrun, P.
Lee, W. M.
Leflat, A.
Lellouch, J.
Li, J.
Li, L.
Li, Q. Z.
Lietti, S. M.
Lim, J. K.
Lima, J. G. R.
Lincoln, D.
Linnemann, J.
Lipaev, V. V.
Lipton, R.
Liu, Y.
Liu, Z.
Lobodenko, A.
Lokajicek, M.
Love, P.
Lubatti, H. J.
Luna-Garcia, R.
Lyon, A. L.
Maciel, A. K. A.
Mackin, D.
Madaras, R. J.
Maettig, P.
Magass, C.
Magerkurth, A.
Mal, P. K.
Malbouisson, H. B.
Malik, S.
Malyshev, V. L.
Maravin, Y.
Martin, B.
McCarthy, R.
Meijer, M. M.
Melnitchouk, A.
Mendoza, L.
Mercadante, P. G.
Merkin, M.
Merritt, K. W.
Meyer, A.
Meyer, J.
Mitrevski, J.
Mommsen, R. K.
Mondal, N. K.
Moore, R. W.
Moulik, T.
Muanza, G. S.
Mulhearn, M.
Mundal, O.
Mundim, L.
Nagy, E.
Naimuddin, M.
Narain, M.
Naumann, N. A.
Neal, H. A.
Negret, J. P.
Neustroev, P.
Nilsen, H.
Nogima, H.
Novaes, S. F.
Nunnemann, T.
O'Dell, V.
O'Neil, D. C.
Obrant, G.
Ochando, C.
Onoprienko, D.
Oshima, N.
Osman, N.
Osta, J.
Otec, R.
Otero y Garzon, G. J.
Owen, M.
Padley, P.
Pangilinan, M.
Parashar, N.
Park, S. -J.
Park, S. K.
Parsons, J.
Partridge, R.
Parua, N.
Patwa, A.
Pawloski, G.
Penning, B.
Perfilov, M.
Peters, K.
Peters, Y.
Petroff, P.
Petteni, M.
Piegaia, R.
Piper, J.
Pleier, M. -A.
Podesta-Lerma, P. L. M.
Podstavkov, V. M.
Pogorelov, Y.
Pol, M. -E.
Polozov, P.
Pope, B. G.
Popov, A. V.
Potter, C.
da Silva, W. L. Prado
Prosper, H. B.
Protopopescu, S.
Qian, J.
Quadt, A.
Quinn, B.
Rakitine, A.
Rangel, M. S.
Ranjan, K.
Ratoff, P. N.
Renkel, P.
Rich, P.
Rijssenbeek, M.
Ripp-Baudot, I.
Rizatdinova, F.
Robinson, S.
Rodrigues, R. F.
Rominsky, M.
Royon, C.
Rubinov, P.
Ruchti, R.
Safronov, G.
Sajot, G.
Sanchez-Hernandez, A.
Sanders, M. P.
Sanghi, B.
Savage, G.
Sawyer, L.
Scanlon, T.
Schaile, D.
Schamberger, R. D.
Scheglov, Y.
Schellman, H.
Schliephake, T.
Schlobohm, S.
Schwanenberger, C.
Schwartzman, A.
Schwienhorst, R.
Sekaric, J.
Severini, H.
Shabalina, E.
Shamim, M.
Shary, V.
Shchukin, A. A.
Shivpuri, R. K.
Siccardi, V.
Simak, V.
Sirotenko, V.
Skubic, P.
Slattery, P.
Smirnov, D.
Snow, G. R.
Snow, J.
Snyder, S.
Soeldner-Rembold, S.
Sonnenschein, L.
Sopczak, A.
Sosebee, M.
Soustruznik, K.
Spurlock, B.
Stark, J.
Stolin, V.
Stoyanova, D. A.
Strandberg, J.
Strandberg, S.
Strang, M. A.
Strauss, E.
Strauss, M.
Stroehmer, R.
Strom, D.
Stutte, L.
Sumowidagdo, S.
Svoisky, P.
Sznajder, A.
Tanasijczuk, A.
Taylor, W.
Tiller, B.
Tissandier, F.
Titov, M.
Tokmenin, V. V.
Torchiani, I.
Tsybychev, D.
Tuchming, B.
Tully, C.
Tuts, P. M.
Unalan, R.
Uvarov, L.
Uvarov, S.
Uzunyan, S.
Vachon, B.
van den Berg, P. J.
Van Kooten, R.
van Leeuwen, W. M.
Varelas, N.
Varnes, E. W.
Vasilyev, I. A.
Verdier, P.
Vertogradov, L. S.
Verzocchi, M.
Vilanova, D.
Villeneuve-Seguier, F.
Vint, P.
Vokac, P.
Voutilainen, M.
Wagner, R.
Wahl, H. D.
Wang, M. H. L. S.
Warchol, J.
Watts, G.
Wayne, M.
Weber, G.
Weber, M.
Welty-Rieger, L.
Wenger, A.
Wermes, N.
Wetstein, M.
White, A.
Wicke, D.
Williams, M.
Wilson, G. W.
Wimpenny, S. J.
Wobisch, M.
Wood, D. R.
Wyatt, T. R.
Xie, Y.
Xu, C.
Yacoob, S.
Yamada, R.
Yang, W. -C.
Yasuda, T.
Yatsunenko, Y. A.
Yin, H.
Yip, K.
Yoo, H. D.
Youn, S. W.
Yu, J.
Zeitnitz, C.
Zelitch, S.
Zhao, T.
Zhou, B.
Zhu, J.
Zielinski, M.
Zieminska, D.
Zieminski, A.
Zivkovic, L.
Zutshi, V.
Zverev, E. G.
CA D0 Collaboration
TI Search for Long-Lived Charged Massive Particles with the D0 Detector
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID CHARGINOS
AB We search for long-lived charged massive particles using 1.1 fb(-1) of data collected by the D0 detector at the Fermilab Tevatron pp Collider. Time-of-flight information is used to search for pair produced long-lived tau sleptons, gauginolike charginos, and Higgsino-like charginos. We find no evidence of a signal and set 95% C.L. cross section upper limits for staus, which vary from 0.31 to 0.04 pb for stau masses between 60 and 300 GeV. We also set lower mass limits of 206 GeV (171 GeV) for pair produced charged gauginos (Higgsinos).
C1 [Piegaia, R.; Tanasijczuk, A.] Univ Buenos Aires, Buenos Aires, DF, Argentina.
[Alves, G. A.; Barreto, J.; da Motta, H.; Maciel, A. K. A.; Pol, M. -E.; Rangel, M. S.] Ctr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, Brazil.
[Jesus, A. C. S. Assis; Begalli, M.; Carvalho, W.; Martins, C. De Oliveira; Malbouisson, H. B.; Mundim, L.; Nogima, H.; da Silva, W. L. Prado; Rodrigues, R. F.; Sznajder, A.] Univ Estado Rio de Janeiro, BR-20550011 Rio De Janeiro, Brazil.
[Gregores, E. M.] Univ Fed ABC, Santo Andre, Brazil.
[Lietti, S. M.; Mercadante, P. G.; Novaes, S. F.] Univ Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, Brazil.
[Aguilo, E.; Beale, S.; Gillberg, D.; Liu, Z.; Moore, R. W.; O'Neil, D. C.; Potter, C.; Taylor, W.; Vachon, B.] Univ Alberta, Edmonton, AB, Canada.
[Aguilo, E.; Beale, S.; Gillberg, D.; Liu, Z.; Moore, R. W.; O'Neil, D. C.; Potter, C.; Taylor, W.; Vachon, B.] Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada.
[Aguilo, E.; Beale, S.; Gillberg, D.; Liu, Z.; Moore, R. W.; O'Neil, D. C.; Potter, C.; Taylor, W.; Vachon, B.] York Univ, Toronto, ON M3J 2R7, Canada.
[Aguilo, E.; Beale, S.; Gillberg, D.; Liu, Z.; Moore, R. W.; O'Neil, D. C.; Potter, C.; Taylor, W.; Vachon, B.] McGill Univ, Montreal, PQ, Canada.
[Bu, X. B.; Han, L.; Liu, Y.; Yin, H.] Univ Sci & Technol China, Hefei 230026, Peoples R China.
[Avila, C.; Gomez, B.; Mendoza, L.; Negret, J. P.] Univ Los Andes, Bogota, Colombia.
[Hynek, V.; Kvita, J.; Soustruznik, K.] Charles Univ Prague, Ctr Particle Phys, Prague, Czech Republic.
[Hubacek, Z.; Otec, R.; Simak, V.; Vokac, P.] Czech Tech Univ, CR-16635 Prague, Czech Republic.
[Kupco, A.; Lokajicek, M.] Acad Sci Czech Republic, Inst Phys, Ctr Particle Phys, Prague, Czech Republic.
[Hoeneisen, B.] Univ San Francisco Quito, Quito, Ecuador.
[Badaud, F.; Gay, P.; Gris, Ph.; Lacroix, F.; Tissandier, F.] Univ Clermont Ferrand, LPC, CNRS, IN2P3, Clermont Ferrand, France.
[Arnoud, Y.; Chevallier, F.; Crepe-Renaudin, S.; Martin, B.; Sajot, G.; Stark, J.] Univ Grenoble 1, CNRS, LPSC, Inst Natl Polytech Grenoble,IN2P3, Grenoble, France.
[Barfuss, A. -F.; Cousinou, M. -C.; Duperrin, A.; Geng, W.; Kajfasz, E.; Kermiche, S.; Muanza, G. S.; Nagy, E.] Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France.
[Calvet, S.; Duflot, L.; Grivaz, J. -F.; Jaffre, M.; Ochando, C.; Petroff, P.] Univ Paris 11, CNRS, LAL, IN2P3, F-91405 Orsay, France.
[Andrieu, B.; Bernardi, G.; Lellouch, J.; Sanders, M. P.; Sonnenschein, L.] Univ Paris 06, CNRS, LPNHE, IN2P3, Paris, France.
[Andrieu, B.; Bernardi, G.; Lellouch, J.; Sanders, M. P.; Sonnenschein, L.] Univ Paris 07, CNRS, LPNHE, IN2P3, Paris, France.
[Arthaud, M.; Bassler, U.; Besancon, M.; Chakrabarti, S.; Couderc, F.; Deliot, F.; Royon, C.; Shary, V.; Titov, M.; Tuchming, B.; Vilanova, D.] SPP, CEA, Irfu, Saclay, France.
[Geist, W.; Ripp-Baudot, I.; Siccardi, V.] Univ Strasbourg, CNRS, IPHC, IN2P3, Strasbourg, France.
[Biscarat, C.; Grenier, G.; Kurca, T.; Lebrun, P.; Verdier, P.] Univ Lyon 1, CNRS, IPNL, IN2P3, F-69622 Villeurbanne, France.
[Grenier, G.; Kurca, T.; Lebrun, P.; Verdier, P.] Univ Lyon, Lyon, France.
[Hebbeker, T.; Kirsch, M.; Magass, C.; Meyer, A.] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany.
[Buescher, V.; Hensel, C.; Hohlfeld, M.; Meyer, J.; Mundal, O.; Park, S. -J.; Pleier, M. -A.; Quadt, A.; Wermes, N.] Univ Bonn, Inst Phys, D-5300 Bonn, Germany.
[Bernhard, R.; Jakobs, K.; Konrath, J. -P.; Nilsen, H.; Penning, B.; Torchiani, I.; Wenger, A.] Univ Freiburg, Inst Phys, Freiburg, Germany.
[Fiedler, F.; Kuhl, T.; Weber, M.] Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany.
[Calfayan, P.; Grohsjean, A.; Haefner, P.; Nunnemann, T.; Schaile, D.; Stroehmer, R.; Tiller, B.] Univ Munich, Munich, Germany.
[Maettig, P.; Peters, Y.; Schliephake, T.; Wicke, D.; Zeitnitz, C.] Univ Wuppertal, Fachbereich Phys, Wuppertal, Germany.
[Beri, S. B.; Bhatnagar, V.; Kohli, J. M.] Panjab Univ, Chandigarh 160014, India.
[Choudhary, B.; Dubey, A.; Ranjan, K.] Univ Delhi, Delhi 110007, India.
[Acharya, B. S.; Banerjee, P.; Banerjee, S.; Dugad, S. R.; Mondal, N. K.] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India.
[Cwiok, M.; Gruenewald, M. W.] Univ Coll Dublin, Dublin 2, Ireland.
[Kim, T. J.; Lim, J. K.; Park, S. K.] Korea Univ, Korea Detector Lab, Seoul, South Korea.
[Choi, S.] Sungkyunkwan Univ, Suwon, South Korea.
[Carrasco-Lizarraga, M. A.; Castilla-Valdez, H.; De La Cruz-Burelo, E.; Luna-Garcia, R.; Podesta-Lerma, P. L. M.; Sanchez-Hernandez, A.] CINVESTAV, Mexico City 14000, DF, Mexico.
[Hegeman, J. G.; Houben, P.; van den Berg, P. J.; van Leeuwen, W. M.] NIKHEF, FOM Inst, Amsterdam, Netherlands.
[Hegeman, J. G.; Houben, P.; van den Berg, P. J.; van Leeuwen, W. M.] Univ Amsterdam, NIKHEF, Amsterdam, Netherlands.
[Anastasoaie, M.; Ancu, L. S.; de Jong, S. J.; Filthaut, F.; Galea, C. F.; Meijer, M. M.; Naumann, N. A.; Svoisky, P.] Radboud Univ Nijmegen, NIKHEF, NL-6525 ED Nijmegen, Netherlands.
[Abazov, V. M.; Alexeev, G. D.; Kharzheev, Y. M.; Malyshev, V. L.; Tokmenin, V. V.; Vertogradov, L. S.; Yatsunenko, Y. A.] Joint Inst Nucl Res, Dubna, Russia.
[Gavrilov, V.; Polozov, P.; Safronov, G.; Stolin, V.] Inst Theoret & Expt Phys, Moscow 117259, Russia.
[Boos, E. E.; Bunichev, V.; Dudko, L. V.; Ermolov, P.; Karmanov, D.; Kuzmin, V. A.; Leflat, A.; Merkin, M.; Perfilov, M.; Zverev, E. G.] Moscow MV Lomonosov State Univ, Moscow, Russia.
[Bezzubov, V. A.; Denisov, S. P.; Evdokimov, V. N.; Kozelov, A. V.; Lipaev, V. V.; Popov, A. V.; Shchukin, A. A.; Stoyanova, D. A.; Vasilyev, I. A.] Inst High Energy Phys, Protvino, Russia.
[Alkhazov, G.; Lobodenko, A.; Neustroev, P.; Obrant, G.; Scheglov, Y.; Uvarov, L.; Uvarov, S.] Petersburg Nucl Phys Inst, St Petersburg, Russia.
[Asman, B.; Belanger-Champagne, C.; Strandberg, S.] Lund Univ, Lund, Sweden.
[Asman, B.; Belanger-Champagne, C.; Strandberg, S.] Royal Inst Technol, Stockholm, Sweden.
[Asman, B.; Belanger-Champagne, C.; Strandberg, S.] Stockholm Univ, S-10691 Stockholm, Sweden.
[Asman, B.; Belanger-Champagne, C.; Strandberg, S.] Uppsala Univ, Uppsala, Sweden.
[Bertram, I.; Borissov, G.; Burdin, S.; Fox, H.; Love, P.; Rakitine, A.; Ratoff, P. N.; Sopczak, A.; Williams, M.] Univ Lancaster, Lancaster, England.
[Bauer, D.; Beuselinck, R.; Blekman, F.; Buszello, C. P.; Davies, G.; Hays, J.; Jesik, R.; Jonsson, P.; Osman, N.; Petteni, M.; Robinson, S.; Scanlon, T.; Villeneuve-Seguier, F.; Vint, P.] Univ London Imperial Coll Sci Technol & Med, London, England.
[Harder, K.; Mommsen, R. K.; Owen, M.; Peters, K.; Rich, P.; Schwanenberger, C.; Soeldner-Rembold, S.; Wyatt, T. R.; Yang, W. -C.] Univ Manchester, Manchester, Lancs, England.
[Cheu, E.; Das, A.; Johns, K.; Varnes, E. W.] Univ Arizona, Tucson, AZ 85721 USA.
[Madaras, R. J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Hall, R. E.] Calif State Univ Fresno, Fresno, CA 93740 USA.
[Chandra, A.; Ellison, J.; Heinson, A. P.; Li, L.; Wimpenny, S. J.] Univ Calif Riverside, Riverside, CA 92521 USA.
[Adams, T.; Askew, A.; Atramentov, O.; Blessing, S.; Buchanan, N. J.; Carrera, E.; Duggan, D.; Gershtein, Y.; Hagopian, S.; Kau, D.; Prosper, H. B.; Sekaric, J.; Sumowidagdo, S.; Wahl, H. D.] Florida State Univ, Tallahassee, FL 32306 USA.
[Aoki, M.; Bagby, L.; Baldin, B.; Bartlett, J. F.; Bellantoni, L.; Bellavance, A.; Bhat, P. C.; Boehnlein, A.; Bross, A.; Casey, B. C. K.; Cihangir, S.; Cooke, M.; Cooper, W. E.; Demarteau, M.; Denisov, D.; Desai, S.; Diehl, H. T.; Diesburg, M.; Elvira, V. D.; Fisher, W.; Fisk, H. E.; Fu, S.; Fuess, S.; Greenlee, H.; Gruenendahl, S.; Gutierrez, G.; Illingworth, R.; Ito, A. S.; Johnson, M.; Jonckheere, A.; Juste, A.; Kasper, P. A.; Khalatyan, N.; Klima, B.; Lee, W. M.; Li, Q. Z.; Lincoln, D.; Lipton, R.; Lyon, A. L.; Merritt, K. W.; Naimuddin, M.; O'Dell, V.; Oshima, N.; Otero y Garzon, G. J.; Podstavkov, V. M.; Rubinov, P.; Sanghi, B.; Savage, G.; Sirotenko, V.; Stutte, L.; Verzocchi, M.; Wang, M. H. L. S.; Weber, M.; Yamada, R.; Yasuda, T.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Adams, M.; Gerber, C. E.; Shabalina, E.; Varelas, N.] Univ Illinois, Chicago, IL 60607 USA.
[Blazey, G.; Dyshkant, A.; Fortner, M.; Hedin, D.; Lima, J. G. R.; Uzunyan, S.; Zutshi, V.] No Illinois Univ, De Kalb, IL 60115 USA.
[Andeen, T.; Anzelc, M. S.; Buchholz, D.; Kirby, M. H.; Schellman, H.; Strom, D.; Yacoob, S.; Youn, S. W.] Northwestern Univ, Evanston, IL 60208 USA.
[Evans, H.; Parua, N.; Van Kooten, R.; Welty-Rieger, L.; Zieminska, D.; Zieminski, A.] Indiana Univ, Bloomington, IN 47405 USA.
[Chan, K. M.; Hildreth, M. D.; Lam, D.; Osta, J.; Pogorelov, Y.; Ruchti, R.; Smirnov, D.; Warchol, J.; Wayne, M.] Univ Notre Dame, Notre Dame, IN 46556 USA.
[Parashar, N.] Purdue Univ Calumet, Hammond, IN 46323 USA.
[Hauptman, J. M.] Iowa State Univ, Ames, IA 50011 USA.
[Baringer, P.; Bean, A.; Clutter, J.; Moulik, T.; Wilson, G. W.] Univ Kansas, Lawrence, KS 66045 USA.
[Ahsan, M.; Bandurin, D. V.; Bolton, T. A.; Cuplov, V.; Ferapontov, A. V.; Maravin, Y.; Onoprienko, D.; Shamim, M.] Kansas State Univ, Manhattan, KS 66506 USA.
[Arov, M.; Greenwood, Z. D.; Sawyer, L.; Wobisch, M.] Louisiana Tech Univ, Ruston, LA 71272 USA.
[Eno, S.; Hadley, N. J.; Jarvis, C.; Wetstein, M.] Univ Maryland, College Pk, MD 20742 USA.
[Boline, D.; Butler, J. M.; Cho, D. K.; Heintz, U.; Jabeen, S.] Boston Univ, Boston, MA 02215 USA.
[Alverson, G.; Barberis, E.; Hesketh, G.; Wood, D. R.] Northeastern Univ, Boston, MA 02115 USA.
[Alton, A.; Magerkurth, A.; Neal, H. A.; Qian, J.; Strandberg, J.; Xu, C.; Zhou, B.] Univ Michigan, Ann Arbor, MI 48109 USA.
[Abolins, M.; Benitez, J. A.; Brock, R.; Dyer, J.; Edmunds, D.; Geng, W.; Hall, I.; Kraus, J.; Linnemann, J.; Piper, J.; Pope, B. G.; Schwienhorst, R.; Unalan, R.] Michigan State Univ, E Lansing, MI 48824 USA.
[Melnitchouk, A.; Quinn, B.] Univ Mississippi, University, MS 38677 USA.
[Bloom, K.; Claes, D.; De Vaughan, K.; Dominguez, A.; Eads, M.; Johnston, D.; Malik, S.; Snow, G. R.; Voutilainen, M.] Univ Nebraska, Lincoln, NE 68588 USA.
[Haley, J.; Schwartzman, A.; Tully, C.; Wagner, R.] Princeton Univ, Princeton, NJ 08544 USA.
[Iashvili, I.; Kharchilava, A.; Kumar, A.; Strang, M. A.] SUNY Buffalo, Buffalo, NY 14260 USA.
[Brooijmans, G.; Gadfort, T.; Haas, A.; Johnson, C.; Katsanos, I.; Khatidze, D.; Lammers, S.; Mitrevski, J.; Mulhearn, M.; Parsons, J.; Tuts, P. M.; Zivkovic, L.] Columbia Univ, New York, NY 10027 USA.
[Cammin, J.; Demina, R.; Ferbel, T.; Garcia, C.; Garcia-Bellido, A.; Ginther, G.; Harel, A.; Slattery, P.; Zielinski, M.] Univ Rochester, Rochester, NY 14627 USA.
[Grannis, P. D.; Guo, F.; Guo, J.; Herner, K.; Hobbs, J. D.; Hu, Y.; McCarthy, R.; Rijssenbeek, M.; Schamberger, R. D.; Strauss, E.; Tsybychev, D.; Zhu, J.] SUNY Stony Brook, Stony Brook, NY 11794 USA.
[Begel, M.; Evdokimov, A.; Patwa, A.; Protopopescu, S.; Snyder, S.; Yip, K.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Snow, J.] Langston Univ, Langston, OK 73050 USA.
[Abbott, B.; Gutierrez, P.; Hossain, S.; Jain, S.; Rominsky, M.; Severini, H.; Skubic, P.; Strauss, M.] Univ Oklahoma, Norman, OK 73019 USA.
[Khanov, A.; Rizatdinova, F.] Oklahoma State Univ, Stillwater, OK 74078 USA.
[Bose, T.; Christoudias, T.; Cutts, D.; Enari, Y.; Landsberg, G.; Narain, M.; Pangilinan, M.; Partridge, R.; Xie, Y.; Yoo, H. D.] Brown Univ, Providence, RI 02912 USA.
[Brandt, A.; De, K.; Kaushik, V.; Li, J.; Sosebee, M.; Spurlock, B.; White, A.; Yu, J.] Univ Texas Arlington, Arlington, TX 76019 USA.
[Kehoe, R.; Renkel, P.] So Methodist Univ, Dallas, TX 75275 USA.
[Bargassa, P.; Corcoran, M.; Mackin, D.; Padley, P.; Pawloski, G.] Rice Univ, Houston, TX 77005 USA.
[Brown, D.; Buehler, M.; Hirosky, R.; Zelitch, S.] Univ Virginia, Charlottesville, VA 22901 USA.
[Burnett, T. H.; Dorland, T.; Goussiou, A.; Lubatti, H. J.; Mal, P. K.; Schlobohm, S.; Watts, G.; Zhao, T.] Univ Washington, Seattle, WA 98195 USA.
RP Abazov, VM (reprint author), Univ Buenos Aires, Buenos Aires, DF, Argentina.
RI Bargassa, Pedrame/O-2417-2016; Li, Liang/O-1107-2015; Juste,
Aurelio/I-2531-2015; De, Kaushik/N-1953-2013; Ancu, Lucian
Stefan/F-1812-2010; Alves, Gilvan/C-4007-2013; Deliot,
Frederic/F-3321-2014; Sharyy, Viatcheslav/F-9057-2014; Lokajicek,
Milos/G-7800-2014; Kupco, Alexander/G-9713-2014; Kozelov,
Alexander/J-3812-2014; Christoudias, Theodoros/E-7305-2015; KIM, Tae
Jeong/P-7848-2015; Guo, Jun/O-5202-2015; Sznajder, Andre/L-1621-2016;
Shivpuri, R K/A-5848-2010; Mercadante, Pedro/K-1918-2012; Yip,
Kin/D-6860-2013; Mundim, Luiz/A-1291-2012; Fisher, Wade/N-4491-2013;
Gutierrez, Phillip/C-1161-2011; bu, xuebing/D-1121-2012; Dudko,
Lev/D-7127-2012; Leflat, Alexander/D-7284-2012; Perfilov,
Maxim/E-1064-2012; Boos, Eduard/D-9748-2012; Merkin,
Mikhail/D-6809-2012; Novaes, Sergio/D-3532-2012
OI Filthaut, Frank/0000-0003-3338-2247; Naumann, Axel/0000-0002-4725-0766;
Belanger-Champagne, Camille/0000-0003-2368-2617; Begel,
Michael/0000-0002-1634-4399; Haas, Andrew/0000-0002-4832-0455; Williams,
Mark/0000-0001-5448-4213; Weber, Michele/0000-0002-2770-9031; Grohsjean,
Alexander/0000-0003-0748-8494; Melnychuk, Oleksandr/0000-0002-2089-8685;
Bassler, Ursula/0000-0002-9041-3057; Qian, Jianming/0000-0003-4813-8167;
Madaras, Ronald/0000-0001-7399-2993; Evans, Harold/0000-0003-2183-3127;
Malik, Sudhir/0000-0002-6356-2655; Blazey, Gerald/0000-0002-7435-5758;
Wahl, Horst/0000-0002-1345-0401; Gershtein, Yuri/0000-0002-4871-5449;
Weber, Gernot/0000-0003-4199-1640; Bean, Alice/0000-0001-5967-8674;
Bargassa, Pedrame/0000-0001-8612-3332; Carrera,
Edgar/0000-0002-0857-8507; Li, Liang/0000-0001-6411-6107; Sawyer,
Lee/0000-0001-8295-0605; Hedin, David/0000-0001-9984-215X; Juste,
Aurelio/0000-0002-1558-3291; de Jong, Sijbrand/0000-0002-3120-3367;
Landsberg, Greg/0000-0002-4184-9380; Blessing,
Susan/0000-0002-4455-7279; Duperrin, Arnaud/0000-0002-5789-9825;
Hoeneisen, Bruce/0000-0002-6059-4256; Blekman,
Freya/0000-0002-7366-7098; Beuselinck, Raymond/0000-0003-2613-7446;
Heinson, Ann/0000-0003-4209-6146; grannis, paul/0000-0003-4692-2142; De,
Kaushik/0000-0002-5647-4489; Ancu, Lucian Stefan/0000-0001-5068-6723;
Sharyy, Viatcheslav/0000-0002-7161-2616; Christoudias,
Theodoros/0000-0001-9050-3880; KIM, Tae Jeong/0000-0001-8336-2434; Guo,
Jun/0000-0001-8125-9433; Sznajder, Andre/0000-0001-6998-1108; Yip,
Kin/0000-0002-8576-4311; Mundim, Luiz/0000-0001-9964-7805; Dudko,
Lev/0000-0002-4462-3192; Novaes, Sergio/0000-0003-0471-8549
FU DOE; NSF ( U. S. A.); CEA; CNRS/IN2P3; FASI; Rosatom; RFBR ( Russia);
CNPq; FAPERJ; FAPESP; FUNDUNESP ( Brazil); DAE; DST ( India);
Colciencias ( Colombia); CONACyT ( Mexico); KRF; KOSEF ( Korea);
CONICET; UBACyT ( Argentina); FOM ( The Netherlands); STFC ( United
Kingdom); MSMT; GACR ( Czech Republic); CRC Program; CFI; NSERC;
WestGrid Project ( Canada); BMBF; DFG ( Germany); SFI ( Ireland); The
Swedish Research Council (Sweden); CAS; CNSF ( China); Alexander von
Humboldt Foundation ( Germany)
FX We thank the staffs at Fermilab and collaborating institutions, and
acknowledge support from the DOE and NSF ( U. S. A.); CEA and CNRS/IN2P3
( France); FASI, Rosatom, and RFBR ( Russia); CNPq, FAPERJ, FAPESP, and
FUNDUNESP ( Brazil); DAE and DST ( India); Colciencias ( Colombia);
CONACyT ( Mexico); KRF and KOSEF ( Korea); CONICET and UBACyT (
Argentina); FOM ( The Netherlands); STFC ( United Kingdom); MSMT and
GACR ( Czech Republic); CRC Program, CFI, NSERC, and WestGrid Project (
Canada); BMBF and DFG ( Germany); SFI ( Ireland); The Swedish Research
Council ( Sweden); CAS and CNSF ( China); and the Alexander von Humboldt
Foundation ( Germany).
NR 18
TC 45
Z9 45
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 24
PY 2009
VL 102
IS 16
AR 161802
DI 10.1103/PhysRevLett.102.161802
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 437IC
UT WOS:000265479300013
ER
PT J
AU Aubert, B
Bona, M
Karyotakis, Y
Lees, JP
Poireau, V
Prencipe, E
Prudent, X
Tisserand, V
Tico, JG
Grauges, E
Lopez, L
Palano, A
Pappagallo, M
Eigen, G
Stugu, B
Sun, L
Abrams, GS
Battaglia, M
Brown, DN
Cahn, RN
Jacobsen, RG
Kerth, LT
Kolomensky, YG
Lynch, G
Osipenkov, IL
Ronan, MT
Tackmann, K
Tanabe, T
Hawkes, CM
Soni, N
Watson, AT
Koch, H
Schroeder, T
Walker, D
Asgeirsson, DJ
Fulsom, BG
Hearty, C
Mattison, TS
McKenna, JA
Barrett, M
Khan, A
Blinov, VE
Bukin, AD
Buzykaev, AR
Druzhinin, VP
Golubev, VB
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Todyshev, KY
Bondioli, M
Curry, S
Eschrich, I
Kirkby, D
Lankford, AJ
Lund, P
Mandelkern, M
Martin, EC
Stoker, DP
Abachi, S
Buchanan, C
Gary, JW
Liu, F
Long, O
Shen, BC
Vitug, GM
Yasin, Z
Zhang, L
Sharma, V
Campagnari, C
Hong, TM
Kovalskyi, D
Mazur, MA
Richman, JD
Beck, TW
Eisner, AM
Flacco, CJ
Heusch, CA
Kroseberg, J
Lockman, WS
Martinez, AJ
Schalk, T
Schumm, BA
Seiden, A
Wilson, MG
Winstrom, LO
Cheng, CH
Doll, DA
Echenard, B
Fang, F
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Andreassen, R
Mancinelli, G
Meadows, BT
Mishra, K
Sokoloff, MD
Bloom, PC
Ford, WT
Gaz, A
Hirschauer, JF
Nagel, M
Nauenberg, U
Smith, JG
Ulmer, KA
Wagner, SR
Ayad, R
Soffer, A
Toki, WH
Wilson, RJ
Altenburg, DD
Feltresi, E
Hauke, A
Jasper, H
Karbach, M
Merkel, J
Petzold, A
Spaan, B
Wacker, K
Kobel, MJ
Mader, WF
Nogowski, R
Schubert, KR
Schwierz, R
Volk, A
Bernard, D
Bonneaud, GR
Latour, E
Verderi, M
Clark, PJ
Playfer, S
Watson, JE
Andreotti, M
Bettoni, D
Bozzi, C
Calabrese, R
Cecchi, A
Cibinetto, G
Franchini, P
Luppi, E
Negrini, M
Petrella, A
Piemontese, L
Santoro, V
Baldini-Ferroli, R
Calcaterra, A
de Sangro, R
Finocchiaro, G
Pacetti, S
Patteri, P
Peruzzi, IM
Piccolo, M
Rama, M
Zallo, A
Buzzo, A
Contri, R
Lo Vetere, M
Macri, MM
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Santroni, A
Tosi, S
Chaisanguanthum, KS
Morii, M
Adametz, A
Marks, J
Schenk, S
Uwer, U
Klose, V
Lacker, HM
Bard, DJ
Dauncey, PD
Nash, JA
Tibbetts, M
Behera, PK
Chai, X
Charles, MJ
Mallik, U
Cochran, J
Crawley, HB
Dong, L
Meyer, WT
Prell, S
Rosenberg, EI
Rubin, AE
Gao, YY
Gritsan, AV
Guo, ZJ
Lae, CK
Arnaud, N
Bequilleux, J
D'Orazio, A
Davier, M
da Costa, JF
Grosdidier, G
Hocker, A
Lepeltier, V
Le Diberder, F
Lutz, AM
Pruvot, S
Roudeau, P
Schune, MH
Serrano, J
Sordini, V
Stocchi, A
Wormser, G
Lange, DJ
Wright, DM
Bingham, I
Burke, JP
Chavez, CA
Fry, JR
Gabathuler, E
Gamet, R
Hutchcroft, DE
Payne, DJ
Touramanis, C
Bevan, AJ
Clarke, CK
George, KA
Di Lodovico, F
Sacco, R
Sigamani, M
Cowan, G
Flaecher, HU
Hopkins, DA
Paramesvaran, S
Salvatore, F
Wren, AC
Brown, DN
Davis, CL
Denig, AG
Fritsch, M
Gradl, W
Schott, G
Alwyn, KE
Bailey, D
Barlow, RJ
Chia, YM
Edgar, CL
Jackson, G
Lafferty, GD
West, TJ
Yi, JI
Anderson, J
Chen, C
Jawahery, A
Roberts, DA
Simi, G
Tuggle, JM
Dallapiccola, C
Li, X
Salvati, E
Saremi, S
Cowan, R
Dujmic, D
Fisher, PH
Sciolla, G
Spitznagel, M
Taylor, F
Yamamoto, RK
Zhao, M
Patel, PM
Robertson, SH
Lazzaro, A
Lombardo, V
Palombo, F
Bauer, JM
Cremaldi, L
Godang, R
Kroeger, R
Sanders, DA
Summers, DJ
Zhao, HW
Simard, M
Taras, P
Viaud, FB
Nicholson, H
De Nardo, G
Lista, L
Monorchio, D
Onorato, G
Sciacca, C
Raven, G
Snoek, HL
Jessop, CP
Knoepfel, KJ
LoSecco, JM
Wang, WF
Benelli, G
Corwin, LA
Honscheid, K
Kagan, H
Kass, R
Morris, JP
Rahimi, AM
Regensburger, JJ
Sekula, SJ
Wong, QK
Blount, NL
Brau, J
Frey, R
Igonkina, O
Kolb, JA
Lu, M
Rahmat, R
Sinev, NB
Strom, D
Strube, J
Torrence, E
Castelli, G
Gagliardi, N
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Voci, C
Sanchez, PD
Ben-Haim, E
Briand, H
Calderini, G
Chauveau, J
David, P
Del Buono, L
Hamon, O
Leruste, P
Ocariz, J
Perez, A
Prendki, J
Sitt, S
Gladney, L
Biasini, M
Covarelli, R
Manoni, E
Angelini, C
Batignani, G
Bettarini, S
Carpinelli, M
Cervelli, A
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Morganti, M
Neri, N
Paoloni, E
Rizzo, G
Walsh, JJ
Pegna, DL
Lu, C
Olsen, J
Smith, AJS
Telnov, AV
Anulli, F
Baracchini, E
Cavoto, G
del Re, D
Di Marco, E
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Jackson, PD
Gioi, LL
Mazzoni, MA
Morganti, S
Piredda, G
Polci, F
Renga, F
Voena, C
Ebert, M
Hartmann, T
Schroder, H
Waldi, R
Adye, T
Franek, B
Olaiya, EO
Wilson, FF
Emery, S
Escalier, M
Esteve, L
Ganzhur, SF
de Monchenault, GH
Kozanecki, W
Vasseur, G
Yeche, C
Zito, M
Chen, XR
Liu, H
Park, W
Purohit, MV
White, RM
Wilson, JR
Allen, MT
Aston, D
Bartoldus, R
Bechtle, P
Benitez, JF
Cenci, R
Coleman, JP
Convery, MR
Dingfelder, JC
Dorfan, J
Dubois-Felsmann, GP
Dunwoodie, W
Field, RC
Gabareen, AM
Gowdy, SJ
Graham, MT
Grenier, P
Hast, C
Innes, WR
Kaminski, J
Kelsey, MH
Kim, H
Kim, P
Kocian, ML
Leith, DWGS
Li, S
Lindquist, B
Luitz, S
Luth, V
Lynch, HL
MacFarlane, DB
Marsiske, H
Messner, R
Muller, DR
Neal, H
Nelson, S
O'Grady, CP
Ofte, I
Perazzo, A
Perl, M
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Snyder, A
Su, D
Sullivan, MK
Suzuki, K
Swain, SK
Thompson, JM
Va'vra, J
Wagner, AP
Weaver, M
West, CA
Wisniewski, WJ
Wittgen, M
Wright, DH
Wulsin, HW
Yarritu, AK
Yi, K
Young, CC
Ziegler, V
Burchat, PR
Edwards, AJ
Majewski, SA
Miyashita, TS
Petersen, BA
Wilden, L
Ahmed, S
Alam, MS
Ernst, JA
Pan, B
Saeed, MA
Zain, SB
Spanier, SM
Wogsland, BJ
Eckmann, R
Ritchie, JL
Ruland, AM
Schilling, CJ
Schwitters, RF
Drummond, BW
Izen, JM
Lou, XC
Bianchi, F
Gamba, D
Pelliccioni, M
Bomben, M
Bosisio, L
Cartaro, C
Della Ricca, G
Lanceri, L
Vitale, L
Azzolini, V
Lopez-March, N
Martinez-Vidal, F
Milanes, DA
Oyanguren, A
Albert, J
Banerjee, S
Bhuyan, B
Choi, HHF
Hamano, K
Kowalewski, R
Lewczuk, MJ
Nugent, IM
Roney, JM
Sobie, RJ
Gershon, TJ
Harrison, PF
Ilic, J
Latham, TE
Mohanty, GB
Band, HR
Chen, X
Dasu, S
Flood, KT
Pan, Y
Pierini, M
Prepost, R
Vuosalo, CO
Wu, SL
AF Aubert, B.
Bona, M.
Karyotakis, Y.
Lees, J. P.
Poireau, V.
Prencipe, E.
Prudent, X.
Tisserand, V.
Tico, J. Garra
Grauges, E.
Lopez, L.
Palano, A.
Pappagallo, M.
Eigen, G.
Stugu, B.
Sun, L.
Abrams, G. S.
Battaglia, M.
Brown, D. N.
Cahn, R. N.
Jacobsen, R. G.
Kerth, L. T.
Kolomensky, Yu. G.
Lynch, G.
Osipenkov, I. L.
Ronan, M. T.
Tackmann, K.
Tanabe, T.
Hawkes, C. M.
Soni, N.
Watson, A. T.
Koch, H.
Schroeder, T.
Walker, D.
Asgeirsson, D. J.
Fulsom, B. G.
Hearty, C.
Mattison, T. S.
McKenna, J. A.
Barrett, M.
Khan, A.
Blinov, V. E.
Bukin, A. D.
Buzykaev, A. R.
Druzhinin, V. P.
Golubev, V. B.
Onuchin, A. P.
Serednyakov, S. I.
Skovpen, Yu. I.
Solodov, E. P.
Todyshev, K. Yu.
Bondioli, M.
Curry, S.
Eschrich, I.
Kirkby, D.
Lankford, A. J.
Lund, P.
Mandelkern, M.
Martin, E. C.
Stoker, D. P.
Abachi, S.
Buchanan, C.
Gary, J. W.
Liu, F.
Long, O.
Shen, B. C.
Vitug, G. M.
Yasin, Z.
Zhang, L.
Sharma, V.
Campagnari, C.
Hong, T. M.
Kovalskyi, D.
Mazur, M. A.
Richman, J. D.
Beck, T. W.
Eisner, A. M.
Flacco, C. J.
Heusch, C. A.
Kroseberg, J.
Lockman, W. S.
Martinez, A. J.
Schalk, T.
Schumm, B. A.
Seiden, A.
Wilson, M. G.
Winstrom, L. O.
Cheng, C. H.
Doll, D. A.
Echenard, B.
Fang, F.
Hitlin, D. G.
Narsky, I.
Piatenko, T.
Porter, F. C.
Andreassen, R.
Mancinelli, G.
Meadows, B. T.
Mishra, K.
Sokoloff, M. D.
Bloom, P. C.
Ford, W. T.
Gaz, A.
Hirschauer, J. F.
Nagel, M.
Nauenberg, U.
Smith, J. G.
Ulmer, K. A.
Wagner, S. R.
Ayad, R.
Soffer, A.
Toki, W. H.
Wilson, R. J.
Altenburg, D. D.
Feltresi, E.
Hauke, A.
Jasper, H.
Karbach, M.
Merkel, J.
Petzold, A.
Spaan, B.
Wacker, K.
Kobel, M. J.
Mader, W. F.
Nogowski, R.
Schubert, K. R.
Schwierz, R.
Volk, A.
Bernard, D.
Bonneaud, G. R.
Latour, E.
Verderi, M.
Clark, P. J.
Playfer, S.
Watson, J. E.
Andreotti, M.
Bettoni, D.
Bozzi, C.
Calabrese, R.
Cecchi, A.
Cibinetto, G.
Franchini, P.
Luppi, E.
Negrini, M.
Petrella, A.
Piemontese, L.
Santoro, V.
Baldini-Ferroli, R.
Calcaterra, A.
de Sangro, R.
Finocchiaro, G.
Pacetti, S.
Patteri, P.
Peruzzi, I. M.
Piccolo, M.
Rama, M.
Zallo, A.
Buzzo, A.
Contri, R.
Lo Vetere, M.
Macri, M. M.
Monge, M. R.
Passaggio, S.
Patrignani, C.
Robutti, E.
Santroni, A.
Tosi, S.
Chaisanguanthum, K. S.
Morii, M.
Adametz, A.
Marks, J.
Schenk, S.
Uwer, U.
Klose, V.
Lacker, H. M.
Bard, D. J.
Dauncey, P. D.
Nash, J. A.
Tibbetts, M.
Behera, P. K.
Chai, X.
Charles, M. J.
Mallik, U.
Cochran, J.
Crawley, H. B.
Dong, L.
Meyer, W. T.
Prell, S.
Rosenberg, E. I.
Rubin, A. E.
Gao, Y. Y.
Gritsan, A. V.
Guo, Z. J.
Lae, C. K.
Arnaud, N.
Bequilleux, J.
D'Orazio, A.
Davier, M.
da Costa, J. Firmino
Grosdidier, G.
Hoecker, A.
Lepeltier, V.
Le Diberder, F.
Lutz, A. M.
Pruvot, S.
Roudeau, P.
Schune, M. H.
Serrano, J.
Sordini, V.
Stocchi, A.
Wormser, G.
Lange, D. J.
Wright, D. M.
Bingham, I.
Burke, J. P.
Chavez, C. A.
Fry, J. R.
Gabathuler, E.
Gamet, R.
Hutchcroft, D. E.
Payne, D. J.
Touramanis, C.
Bevan, A. J.
Clarke, C. K.
George, K. A.
Di Lodovico, F.
Sacco, R.
Sigamani, M.
Cowan, G.
Flaecher, H. U.
Hopkins, D. A.
Paramesvaran, S.
Salvatore, F.
Wren, A. C.
Brown, D. N.
Davis, C. L.
Denig, A. G.
Fritsch, M.
Gradl, W.
Schott, G.
Alwyn, K. E.
Bailey, D.
Barlow, R. J.
Chia, Y. M.
Edgar, C. L.
Jackson, G.
Lafferty, G. D.
West, T. J.
Yi, J. I.
Anderson, J.
Chen, C.
Jawahery, A.
Roberts, D. A.
Simi, G.
Tuggle, J. M.
Dallapiccola, C.
Li, X.
Salvati, E.
Saremi, S.
Cowan, R.
Dujmic, D.
Fisher, P. H.
Sciolla, G.
Spitznagel, M.
Taylor, F.
Yamamoto, R. K.
Zhao, M.
Patel, P. M.
Robertson, S. H.
Lazzaro, A.
Lombardo, V.
Palombo, F.
Bauer, J. M.
Cremaldi, L.
Godang, R.
Kroeger, R.
Sanders, D. A.
Summers, D. J.
Zhao, H. W.
Simard, M.
Taras, P.
Viaud, F. B.
Nicholson, H.
De Nardo, G.
Lista, L.
Monorchio, D.
Onorato, G.
Sciacca, C.
Raven, G.
Snoek, H. L.
Jessop, C. P.
Knoepfel, K. J.
LoSecco, J. M.
Wang, W. F.
Benelli, G.
Corwin, L. A.
Honscheid, K.
Kagan, H.
Kass, R.
Morris, J. P.
Rahimi, A. M.
Regensburger, J. J.
Sekula, S. J.
Wong, Q. K.
Blount, N. L.
Brau, J.
Frey, R.
Igonkina, O.
Kolb, J. A.
Lu, M.
Rahmat, R.
Sinev, N. B.
Strom, D.
Strube, J.
Torrence, E.
Castelli, G.
Gagliardi, N.
Margoni, M.
Morandin, M.
Posocco, M.
Rotondo, M.
Simonetto, F.
Stroili, R.
Voci, C.
Sanchez, P. del Amo
Ben-Haim, E.
Briand, H.
Calderini, G.
Chauveau, J.
David, P.
Del Buono, L.
Hamon, O.
Leruste, Ph.
Ocariz, J.
Perez, A.
Prendki, J.
Sitt, S.
Gladney, L.
Biasini, M.
Covarelli, R.
Manoni, E.
Angelini, C.
Batignani, G.
Bettarini, S.
Carpinelli, M.
Cervelli, A.
Forti, F.
Giorgi, M. A.
Lusiani, A.
Marchiori, G.
Morganti, M.
Neri, N.
Paoloni, E.
Rizzo, G.
Walsh, J. J.
Pegna, D. Lopes
Lu, C.
Olsen, J.
Smith, A. J. S.
Telnov, A. V.
Anulli, F.
Baracchini, E.
Cavoto, G.
del Re, D.
Di Marco, E.
Faccini, R.
Ferrarotto, F.
Ferroni, F.
Gaspero, M.
Jackson, P. D.
Gioi, L. Li
Mazzoni, M. A.
Morganti, S.
Piredda, G.
Polci, F.
Renga, F.
Voena, C.
Ebert, M.
Hartmann, T.
Schroeder, H.
Waldi, R.
Adye, T.
Franek, B.
Olaiya, E. O.
Wilson, F. F.
Emery, S.
Escalier, M.
Esteve, L.
Ganzhur, S. F.
de Monchenault, G. Hamel
Kozanecki, W.
Vasseur, G.
Yeche, Ch.
Zito, M.
Chen, X. R.
Liu, H.
Park, W.
Purohit, M. V.
White, R. M.
Wilson, J. R.
Allen, M. T.
Aston, D.
Bartoldus, R.
Bechtle, P.
Benitez, J. F.
Cenci, R.
Coleman, J. P.
Convery, M. R.
Dingfelder, J. C.
Dorfan, J.
Dubois-Felsmann, G. P.
Dunwoodie, W.
Field, R. C.
Gabareen, A. M.
Gowdy, S. J.
Graham, M. T.
Grenier, P.
Hast, C.
Innes, W. R.
Kaminski, J.
Kelsey, M. H.
Kim, H.
Kim, P.
Kocian, M. L.
Leith, D. W. G. S.
Li, S.
Lindquist, B.
Luitz, S.
Luth, V.
Lynch, H. L.
MacFarlane, D. B.
Marsiske, H.
Messner, R.
Muller, D. R.
Neal, H.
Nelson, S.
O'Grady, C. P.
Ofte, I.
Perazzo, A.
Perl, M.
Ratcliff, B. N.
Roodman, A.
Salnikov, A. A.
Schindler, R. H.
Schwiening, J.
Snyder, A.
Su, D.
Sullivan, M. K.
Suzuki, K.
Swain, S. K.
Thompson, J. M.
Va'vra, J.
Wagner, A. P.
Weaver, M.
West, C. A.
Wisniewski, W. J.
Wittgen, M.
Wright, D. H.
Wulsin, H. W.
Yarritu, A. K.
Yi, K.
Young, C. C.
Ziegler, V.
Burchat, P. R.
Edwards, A. J.
Majewski, S. A.
Miyashita, T. S.
Petersen, B. A.
Wilden, L.
Ahmed, S.
Alam, M. S.
Ernst, J. A.
Pan, B.
Saeed, M. A.
Zain, S. B.
Spanier, S. M.
Wogsland, B. J.
Eckmann, R.
Ritchie, J. L.
Ruland, A. M.
Schilling, C. J.
Schwitters, R. F.
Drummond, B. W.
Izen, J. M.
Lou, X. C.
Bianchi, F.
Gamba, D.
Pelliccioni, M.
Bomben, M.
Bosisio, L.
Cartaro, C.
Della Ricca, G.
Lanceri, L.
Vitale, L.
Azzolini, V.
Lopez-March, N.
Martinez-Vidal, F.
Milanes, D. A.
Oyanguren, A.
Albert, J.
Banerjee, Sw.
Bhuyan, B.
Choi, H. H. F.
Hamano, K.
Kowalewski, R.
Lewczuk, M. J.
Nugent, I. M.
Roney, J. M.
Sobie, R. J.
Gershon, T. J.
Harrison, P. F.
Ilic, J.
Latham, T. E.
Mohanty, G. B.
Band, H. R.
Chen, X.
Dasu, S.
Flood, K. T.
Pan, Y.
Pierini, M.
Prepost, R.
Vuosalo, C. O.
Wu, S. L.
CA BABAR Collaboration
TI Measurement of B -> X gamma Decays and Determination of |V-td/V-ts|
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID B-DECAYS; SUPERSYMMETRY; PHYSICS; MODEL
AB Using a sample of 383x10(6) BB events collected by the BABAR experiment, we measure sums of seven exclusive final states B -> X-d(s)gamma, where X-d(X-s) is a nonstrange (strange) charmless hadronic system in the mass range 0.6-1.8 GeV/c(2). After correcting for unmeasured decay modes in this mass range, we obtain a branching fraction for b -> d gamma of (7.2 +/- 2.7(stat)+/- 2.3(syst))x10(-6). Taking the ratio of X-d to X-s we find Gamma(b -> d gamma)/Gamma(b -> s gamma)=0.033 +/- 0.013(stat)+/- 0.009(syst), from which we determine |V-td/V-ts|=0.177 +/- 0.043.
C1 [Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.] CNRS, Phys Particules Lab, IN2P3, F-74941 Annecy Le Vieux, France.
[Tico, J. Garra; Grauges, E.] Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, Spain.
[Lopez, L.; Palano, A.; Pappagallo, M.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
[Lopez, L.; Palano, A.; Pappagallo, M.] Univ Bari, Dipartmento Fis, I-70126 Bari, Italy.
[Eigen, G.; Stugu, B.; Sun, L.] Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
[Abrams, G. S.; Battaglia, M.; Brown, D. N.; Cahn, R. N.; Jacobsen, R. G.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G.; Osipenkov, I. L.; Ronan, M. T.; Tackmann, K.; Tanabe, T.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Hawkes, C. M.; Soni, N.; Watson, A. T.] Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
[Koch, H.; Schroeder, T.] Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany.
[Walker, D.] Univ Bristol, Bristol BS8 1TL, Avon, England.
[Asgeirsson, D. J.; Fulsom, B. G.; Hearty, C.; Mattison, T. S.; McKenna, J. A.] Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
[Barrett, M.; Khan, A.] Brunel Univ, Uxbridge UB8 3PH, Middx, England.
[Blinov, V. E.; Bukin, A. D.; Buzykaev, A. R.; Druzhinin, V. P.; Golubev, V. B.; Onuchin, A. P.; Serednyakov, S. I.; Skovpen, Yu. I.; Solodov, E. P.; Todyshev, K. Yu.] Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
[Bondioli, M.; Curry, S.; Eschrich, I.; Kirkby, D.; Lankford, A. J.; Lund, P.; Mandelkern, M.; Martin, E. C.; Stoker, D. P.] Univ Calif Irvine, Irvine, CA 92697 USA.
[Abachi, S.; Buchanan, C.] Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
[Gary, J. W.; Liu, F.; Long, O.; Shen, B. C.; Vitug, G. M.; Yasin, Z.; Zhang, L.] Univ Calif Riverside, Riverside, CA 92521 USA.
[Sharma, V.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[Campagnari, C.; Hong, T. M.; Kovalskyi, D.; Mazur, M. A.; Richman, J. D.] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
[Beck, T. W.; Eisner, A. M.; Flacco, C. J.; Heusch, C. A.; Kroseberg, J.; Lockman, W. S.; Martinez, A. J.; Schalk, T.; Schumm, B. A.; Seiden, A.; Wilson, M. G.; Winstrom, L. O.] Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA.
[Cheng, C. H.; Doll, D. A.; Echenard, B.; Fang, F.; Hitlin, D. G.; Narsky, I.; Piatenko, T.; Porter, F. C.] CALTECH, Pasadena, CA 91125 USA.
[Andreassen, R.; Mancinelli, G.; Meadows, B. T.; Mishra, K.; Sokoloff, M. D.] Univ Cincinnati, Cincinnati, OH 45221 USA.
[Bloom, P. C.; Ford, W. T.; Gaz, A.; Hirschauer, J. F.; Nagel, M.; Nauenberg, U.; Smith, J. G.; Ulmer, K. A.; Wagner, S. R.] Univ Colorado, Boulder, CO 80309 USA.
[Ayad, R.; Soffer, A.; Toki, W. H.; Wilson, R. J.] Colorado State Univ, Ft Collins, CO 80523 USA.
[Altenburg, D. D.; Feltresi, E.; Hauke, A.; Jasper, H.; Karbach, M.; Merkel, J.; Petzold, A.; Spaan, B.; Wacker, K.] Tech Univ Dortmund, Fak Phys, D-44221 Dortmund, Germany.
[Kobel, M. J.; Mader, W. F.; Nogowski, R.; Schubert, K. R.; Schwierz, R.; Volk, A.] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
[Bernard, D.; Bonneaud, G. R.; Latour, E.; Verderi, M.] Ecole Polytech, Lab Leprincce Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France.
[Clark, P. J.; Playfer, S.; Watson, J. E.] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
[Andreotti, M.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cecchi, A.; Cibinetto, G.; Franchini, P.; Luppi, E.; Negrini, M.; Petrella, A.; Piemontese, L.; Santoro, V.] Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy.
[Andreotti, M.; Calabrese, R.; Cecchi, A.; Cibinetto, G.; Franchini, P.; Luppi, E.; Negrini, M.; Petrella, A.; Santoro, V.] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy.
[Baldini-Ferroli, R.; Calcaterra, A.; de Sangro, R.; Finocchiaro, G.; Pacetti, S.; Patteri, P.; Peruzzi, I. M.; Piccolo, M.; Rama, M.; Zallo, A.] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
[Buzzo, A.; Contri, R.; Lo Vetere, M.; Macri, M. M.; Monge, M. R.; Passaggio, S.; Patrignani, C.; Robutti, E.; Santroni, A.; Tosi, S.] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy.
[Contri, R.; Lo Vetere, M.; Monge, M. R.; Patrignani, C.; Santroni, A.; Tosi, S.] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy.
[Chaisanguanthum, K. S.; Morii, M.] Harvard Univ, Cambridge, MA 02138 USA.
[Adametz, A.; Marks, J.; Schenk, S.; Uwer, U.] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany.
[Klose, V.; Lacker, H. M.] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany.
[Bard, D. J.; Dauncey, P. D.; Nash, J. A.; Tibbetts, M.] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England.
[Behera, P. K.; Chai, X.; Charles, M. J.; Mallik, U.] Univ Iowa, Iowa City, IA 52242 USA.
[Cochran, J.; Crawley, H. B.; Dong, L.; Meyer, W. T.; Prell, S.; Rosenberg, E. I.; Rubin, A. E.] Iowa State Univ, Ames, IA 50011 USA.
[Gao, Y. Y.; Gritsan, A. V.; Guo, Z. J.; Lae, C. K.] Johns Hopkins Univ, Baltimore, MD 21218 USA.
[Arnaud, N.; Bequilleux, J.; D'Orazio, A.; Davier, M.; da Costa, J. Firmino; Grosdidier, G.; Hoecker, A.; Lepeltier, V.; Le Diberder, F.; Lutz, A. M.; Pruvot, S.; Roudeau, P.; Schune, M. H.; Serrano, J.; Sordini, V.; Stocchi, A.; Wormser, G.] CNRS, Lab Accelerateur Lineaire, IN2P3, F-91898 Orsay, France.
[Arnaud, N.; Bequilleux, J.; D'Orazio, A.; Davier, M.; da Costa, J. Firmino; Grosdidier, G.; Hoecker, A.; Lepeltier, V.; Le Diberder, F.; Lutz, A. M.; Pruvot, S.; Roudeau, P.; Schune, M. H.; Serrano, J.; Sordini, V.; Stocchi, A.; Wormser, G.] Univ Paris 11, Ctr Sci Orsay, F-91898 Orsay, France.
[Lange, D. J.; Wright, D. M.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Bingham, I.; Burke, J. P.; Chavez, C. A.; Fry, J. R.; Gabathuler, E.; Gamet, R.; Hutchcroft, D. E.; Payne, D. J.; Touramanis, C.] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England.
[Bevan, A. J.; Clarke, C. K.; George, K. A.; Di Lodovico, F.; Sacco, R.; Sigamani, M.] Univ London, London E1 4NS, England.
[Cowan, G.; Flaecher, H. U.; Hopkins, D. A.; Paramesvaran, S.; Salvatore, F.; Wren, A. C.] Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England.
[Brown, D. N.; Davis, C. L.] Univ Louisville, Louisville, KY 40292 USA.
[Denig, A. G.; Fritsch, M.; Gradl, W.; Schott, G.] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany.
[Alwyn, K. E.; Bailey, D.; Barlow, R. J.; Chia, Y. M.; Edgar, C. L.; Jackson, G.; Lafferty, G. D.; West, T. J.; Yi, J. I.] Univ Manchester, Manchester M13 9PL, Lancs, England.
[Anderson, J.; Chen, C.; Jawahery, A.; Roberts, D. A.; Simi, G.; Tuggle, J. M.] Univ Maryland, College Pk, MD 20742 USA.
[Dallapiccola, C.; Li, X.; Salvati, E.; Saremi, S.] Univ Massachusetts, Amherst, MA 01003 USA.
[Cowan, R.; Dujmic, D.; Fisher, P. H.; Sciolla, G.; Spitznagel, M.; Taylor, F.; Yamamoto, R. K.; Zhao, M.] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
[Patel, P. M.; Robertson, S. H.] McGill Univ, Montreal, PQ H3A 2T8, Canada.
[Lazzaro, A.; Lombardo, V.; Palombo, F.] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy.
[Lazzaro, A.; Palombo, F.] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
[Bauer, J. M.; Cremaldi, L.; Godang, R.; Kroeger, R.; Sanders, D. A.; Summers, D. J.; Zhao, H. W.] Univ Mississippi, University, MS 38677 USA.
[Simard, M.; Taras, P.; Viaud, F. B.] Univ Montreal, Montreal, PQ H3C 3J7, Canada.
[Nicholson, H.] Mt Holyoke Coll, S Hadley, MA 01075 USA.
[De Nardo, G.; Lista, L.; Monorchio, D.; Onorato, G.; Sciacca, C.] Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy.
[De Nardo, G.; Monorchio, D.; Onorato, G.; Sciacca, C.] Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy.
[Raven, G.; Snoek, H. L.] Natl Inst Nucl Phys & High Energy Phys, NIKHEF, NL-1009 DB Amsterdam, Netherlands.
[Jessop, C. P.; Knoepfel, K. J.; LoSecco, J. M.; Wang, W. F.] Univ Notre Dame, Notre Dame, IN 46556 USA.
[Benelli, G.; Corwin, L. A.; Honscheid, K.; Kagan, H.; Kass, R.; Morris, J. P.; Rahimi, A. M.; Regensburger, J. J.; Sekula, S. J.; Wong, Q. K.] Ohio State Univ, Columbus, OH 43210 USA.
[Blount, N. L.; Brau, J.; Frey, R.; Igonkina, O.; Kolb, J. A.; Lu, M.; Rahmat, R.; Sinev, N. B.; Strom, D.; Strube, J.; Torrence, E.] Univ Oregon, Eugene, OR 97403 USA.
[Castelli, G.; Gagliardi, N.; Margoni, M.; Morandin, M.; Posocco, M.; Rotondo, M.; Simonetto, F.; Stroili, R.; Voci, C.] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
[Castelli, G.; Gagliardi, N.; Margoni, M.; Simonetto, F.; Stroili, R.; Voci, C.] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
[Sanchez, P. del Amo; Ben-Haim, E.; Briand, H.; Calderini, G.; Chauveau, J.; David, P.; Del Buono, L.; Hamon, O.; Leruste, Ph.; Ocariz, J.; Perez, A.; Prendki, J.; Sitt, S.] Univ Paris 07, Univ Paris 06, CNRS, IN2P3,Lab Phys Nucl & Hautes Energies, F-75252 Paris, France.
[Gladney, L.] Univ Penn, Philadelphia, PA 19104 USA.
[Biasini, M.; Covarelli, R.; Manoni, E.] Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy.
[Biasini, M.; Covarelli, R.; Manoni, E.] Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
[Angelini, C.; Batignani, G.; Bettarini, S.; Carpinelli, M.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Lusiani, A.; Marchiori, G.; Morganti, M.; Neri, N.; Paoloni, E.; Rizzo, G.; Walsh, J. J.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
[Angelini, C.; Batignani, G.; Bettarini, S.; Carpinelli, M.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Marchiori, G.; Morganti, M.; Neri, N.; Paoloni, E.; Rizzo, G.] Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy.
[Lusiani, A.] Scuola Normale Super Pisa, I-56127 Pisa, Italy.
[Pegna, D. Lopes; Lu, C.; Olsen, J.; Smith, A. J. S.; Telnov, A. V.] Princeton Univ, Princeton, NJ 08544 USA.
[Anulli, F.; Baracchini, E.; Cavoto, G.; del Re, D.; Di Marco, E.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Jackson, P. D.; Gioi, L. Li; Mazzoni, M. A.; Morganti, S.; Piredda, G.; Polci, F.; Renga, F.; Voena, C.] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy.
[Baracchini, E.; del Re, D.; Di Marco, E.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Polci, F.; Renga, F.; Voena, C.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
[Ebert, M.; Hartmann, T.; Schroeder, H.; Waldi, R.] Univ Rostock, D-18051 Rostock, Germany.
[Adye, T.; Franek, B.; Olaiya, E. O.; Wilson, F. F.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Emery, S.; Escalier, M.; Esteve, L.; Ganzhur, S. F.; de Monchenault, G. Hamel; Kozanecki, W.; Vasseur, G.; Yeche, Ch.; Zito, M.] Ctr Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France.
[Chen, X. R.; Liu, H.; Park, W.; Purohit, M. V.; White, R. M.; Wilson, J. R.] Univ S Carolina, Columbia, SC 29208 USA.
[Allen, M. T.; Aston, D.; Bartoldus, R.; Bechtle, P.; Benitez, J. F.; Cenci, R.; Coleman, J. P.; Convery, M. R.; Dingfelder, J. C.; Dorfan, J.; Dubois-Felsmann, G. P.; Dunwoodie, W.; Field, R. C.; Gabareen, A. M.; Gowdy, S. J.; Graham, M. T.; Grenier, P.; Hast, C.; Innes, W. R.; Kaminski, J.; Kelsey, M. H.; Kim, H.; Kim, P.; Kocian, M. L.; Leith, D. W. G. S.; Li, S.; Lindquist, B.; Luitz, S.; Luth, V.; Lynch, H. L.; MacFarlane, D. B.; Marsiske, H.; Messner, R.; Muller, D. R.; Neal, H.; Nelson, S.; O'Grady, C. P.; Ofte, I.; Perazzo, A.; Perl, M.; Ratcliff, B. N.; Roodman, A.; Salnikov, A. A.; Schindler, R. H.; Schwiening, J.; Snyder, A.; Su, D.; Sullivan, M. K.; Suzuki, K.; Swain, S. K.; Thompson, J. M.; Va'vra, J.; Wagner, A. P.; Weaver, M.; West, C. A.; Wisniewski, W. J.; Wittgen, M.; Wright, D. H.; Wulsin, H. W.; Yarritu, A. K.; Yi, K.; Young, C. C.; Ziegler, V.] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
[Burchat, P. R.; Edwards, A. J.; Majewski, S. A.; Miyashita, T. S.; Petersen, B. A.; Wilden, L.] Stanford Univ, Stanford, CA 94305 USA.
[Ahmed, S.; Alam, M. S.; Ernst, J. A.; Pan, B.; Saeed, M. A.; Zain, S. B.] SUNY Albany, Albany, NY 12222 USA.
[Spanier, S. M.; Wogsland, B. J.] Univ Tennessee, Knoxville, TN 37996 USA.
[Eckmann, R.; Ritchie, J. L.; Ruland, A. M.; Schilling, C. J.; Schwitters, R. F.] Univ Texas Austin, Austin, TX 78712 USA.
[Drummond, B. W.; Izen, J. M.; Lou, X. C.] Univ Texas Dallas, Richardson, TX 75083 USA.
[Bianchi, F.; Gamba, D.; Pelliccioni, M.] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy.
[Bianchi, F.; Gamba, D.; Pelliccioni, M.] Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
[Bomben, M.; Bosisio, L.; Cartaro, C.; Della Ricca, G.; Lanceri, L.; Vitale, L.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
[Bomben, M.; Bosisio, L.; Cartaro, C.; Della Ricca, G.; Lanceri, L.; Vitale, L.] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
[Azzolini, V.; Lopez-March, N.; Martinez-Vidal, F.; Milanes, D. A.; Oyanguren, A.] Univ Valencia, IFIC, CSIC, E-46071 Valencia, Spain.
[Albert, J.; Banerjee, Sw.; Bhuyan, B.; Choi, H. H. F.; Hamano, K.; Kowalewski, R.; Lewczuk, M. J.; Nugent, I. M.; Roney, J. M.; Sobie, R. J.] Univ Victoria, Victoria, BC V8W 3P6, Canada.
[Gershon, T. J.; Harrison, P. F.; Ilic, J.; Latham, T. E.; Mohanty, G. B.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
[Band, H. R.; Chen, X.; Dasu, S.; Flood, K. T.; Pan, Y.; Pierini, M.; Prepost, R.; Vuosalo, C. O.; Wu, S. L.] Univ Wisconsin, Madison, WI 53706 USA.
[Carpinelli, M.] Univ Sassari, I-07100 Sassari, Italy.
RP Aubert, B (reprint author), CNRS, Phys Particules Lab, IN2P3, F-74941 Annecy Le Vieux, France.
RI Oyanguren, Arantza/K-6454-2014; Luppi, Eleonora/A-4902-2015; White,
Ryan/E-2979-2015; Calabrese, Roberto/G-4405-2015; Patrignani,
Claudia/C-5223-2009; Neri, Nicola/G-3991-2012; Forti,
Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; de Sangro,
Riccardo/J-2901-2012; Saeed, Mohammad Alam/J-7455-2012; Negrini,
Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Rizzo,
Giuliana/A-8516-2015; dong, liaoyuan/A-5093-2015; Martinez Vidal,
F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere,
Maurizio/J-5049-2012; Lusiani, Alberto/N-2976-2015; Morandin,
Mauro/A-3308-2016; Lusiani, Alberto/A-3329-2016; Della Ricca,
Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; Pappagallo,
Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey,
Raymond/E-2830-2016;
OI Oyanguren, Arantza/0000-0002-8240-7300; Luppi,
Eleonora/0000-0002-1072-5633; White, Ryan/0000-0003-3589-5900;
Calabrese, Roberto/0000-0002-1354-5400; Patrignani,
Claudia/0000-0002-5882-1747; Neri, Nicola/0000-0002-6106-3756; Forti,
Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163; de
Sangro, Riccardo/0000-0002-3808-5455; Saeed, Mohammad
Alam/0000-0002-3529-9255; Negrini, Matteo/0000-0003-0101-6963; Monge,
Maria Roberta/0000-0003-1633-3195; Chen, Chunhui /0000-0003-1589-9955;
Raven, Gerhard/0000-0002-2897-5323; Pacetti, Simone/0000-0002-6385-3508;
Covarelli, Roberto/0000-0003-1216-5235; Rizzo,
Giuliana/0000-0003-1788-2866; Carpinelli, Massimo/0000-0002-8205-930X;
Sciacca, Crisostomo/0000-0002-8412-4072; Adye, Tim/0000-0003-0627-5059;
Lafferty, George/0000-0003-0658-4919; Faccini,
Riccardo/0000-0003-2613-5141; Wilson, Robert/0000-0002-8184-4103;
Strube, Jan/0000-0001-7470-9301; Paoloni, Eugenio/0000-0001-5969-8712;
Corwin, Luke/0000-0001-7143-3821; Bettarini,
Stefano/0000-0001-7742-2998; Lanceri, Livio/0000-0001-8220-3095; Ebert,
Marcus/0000-0002-3014-1512; Cibinetto, Gianluigi/0000-0002-3491-6231;
dong, liaoyuan/0000-0002-4773-5050; Martinez Vidal,
F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere,
Maurizio/0000-0002-6520-4480; Lusiani, Alberto/0000-0002-6876-3288;
Morandin, Mauro/0000-0003-4708-4240; Lusiani,
Alberto/0000-0002-6876-3288; Della Ricca, Giuseppe/0000-0003-2831-6982;
Di Lodovico, Francesca/0000-0003-3952-2175; Pappagallo,
Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826;
Frey, Raymond/0000-0003-0341-2636; Hamel de Monchenault,
Gautier/0000-0002-3872-3592
FU DOE and NSF ( USA); NSERC ( Canada); CEA; BMBF; DFG ( Germany); INFN (
Italy),; FOM ( The Netherlands); NFR ( Norway); MES ( Russia); MEC (
Spain); STFC ( United Kingdom); Marie Curie EIF ( European Union); A. P.
Sloan Foundation; [CNRS-IN2P3]
FX We are grateful for the excellent luminosity and machine conditions
provided by our PEP-II colleagues, and for the substantial dedicated
effort from the computing organizations that support BABAR. The
collaborating institutions wish to thank SLAC for its support and kind
hospitality. This work is supported by DOE and NSF ( USA), NSERC (
Canada), CEA and CNRS-IN2P3 ( France), BMBF and DFG ( Germany), INFN (
Italy), FOM ( The Netherlands), NFR ( Norway), MES ( Russia), MEC (
Spain), and STFC ( United Kingdom). Individuals have received support
from the Marie Curie EIF ( European Union) and the A. P. Sloan
Foundation.
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 24
PY 2009
VL 102
IS 16
AR 161803
DI 10.1103/PhysRevLett.102.161803
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 437IC
UT WOS:000265479300014
ER
PT J
AU Becher, T
Neubert, M
AF Becher, Thomas
Neubert, Matthias
TI Infrared Singularities of Scattering Amplitudes in Perturbative QCD
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ABELIAN GAUGE-THEORIES; JET CROSS-SECTIONS; MASS SINGULARITIES; GLUON
SCATTERING; QUARK SCATTERING; LEADING ORDER; WILSON LOOPS; 2-LOOP;
RENORMALIZATION; EXPONENTIATION
AB An exact formula is derived for the infrared singularities of dimensionally regularized scattering amplitudes in massless QCD with an arbitrary number of loops and legs. It is based on the conjecture that the anomalous-dimension matrix of n-jet operators in soft-collinear effective theory is fully determined by three functions of alpha(s), which can be extracted from known perturbative results for the quark and gluon form factors. This allows us to predict the three-loop coefficients of all 1/epsilon(k) poles for arbitrary n-parton scattering amplitudes, generalizing existing two-loop results.
C1 [Becher, Thomas] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Neubert, Matthias] Johannes Gutenberg Univ Mainz, Inst Phys THEP, D-55099 Mainz, Germany.
RP Becher, T (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA.
FU U.S. DOE [DE-AC02-76CH03000]
FX We are grateful to N. Arkani-Hamed, L. Dixon, and J. Maldacena for
useful comments. T. B. was supported by the U.S. DOE under Grant No.
DE-AC02-76CH03000. Fermilab is operated by the Fermi Research Alliance
under contract with the DOE.
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 24
PY 2009
VL 102
IS 16
AR 162001
DI 10.1103/PhysRevLett.102.162001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 437IC
UT WOS:000265479300015
PM 19518699
ER
PT J
AU da Silva, LGGVD
Sandler, N
Simon, P
Ingersent, K
Ulloa, SE
AF Dias da Silva, Luis G. G. V.
Sandler, Nancy
Simon, Pascal
Ingersent, Kevin
Ulloa, Sergio E.
TI Tunable Pseudogap Kondo Effect and Quantum Phase Transitions in
Aharonov-Bohm Interferometers
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID GAPLESS FERMI SYSTEMS; RENORMALIZATION-GROUP; MAGNETIC-IMPURITIES;
ANDERSON; DOT; INTERFERENCE; DETECTOR
AB We study two quantum dots embedded in the arms of an Aharonov-Bohm ring threaded by a magnetic flux. This system can be described by an effective one-impurity Anderson model with an energy- and flux-dependent density of states. For specific values of the flux, this density of states vanishes at the Fermi energy, yielding a controlled realization of the pseudogap Kondo effect. The conductance and transmission phase shifts reflect a nontrivial interplay between wave interference and interactions, providing clear signatures of quantum phase transitions between Kondo and non-Kondo ground states.
C1 [Dias da Silva, Luis G. G. V.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
[Dias da Silva, Luis G. G. V.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Sandler, Nancy; Ulloa, Sergio E.] Ohio Univ, Dept Phys & Astron, Nanoscale & Quantum Phenomena Inst, Athens, OH 45701 USA.
[Simon, Pascal] CNRS, Lab Phys & Modelisat Milieux Condenses, F-38042 Grenoble, France.
[Simon, Pascal] Univ Grenoble 1, F-38042 Grenoble, France.
[Simon, Pascal] Univ Paris 11, CNRS, UMR 8502, Phys Solides Lab, F-91405 Orsay, France.
[Ingersent, Kevin] Univ Florida, Dept Phys, Gainesville, FL 32611 USA.
RP da Silva, LGGVD (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
EM diasdasilval@ornl.gov
RI Ulloa, Sergio/F-4621-2011; Dias da Silva, Luis/D-8381-2013; Sandler,
Nancy/F-6532-2016;
OI Ulloa, Sergio/0000-0002-3091-4984; Dias da Silva,
Luis/0000-0002-8156-9463; Sandler, Nancy/0000-0001-7288-6339; Ingersent,
Kevin/0000-0001-7071-5800
FU NSF-DMR [0312939, 0710540, 0336431, 0304314, 0710581, 0706020]
FX We acknowledge support under NSF-DMR Grants No. 0312939 and No. 0710540
(University of Florida), No. 0336431, No. 0304314, and No. 0710581 (Ohio
University), and No. 0706020 (University of Tennessee/ORNL).
NR 36
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PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 24
PY 2009
VL 102
IS 16
AR 166806
DI 10.1103/PhysRevLett.102.166806
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 437IC
UT WOS:000265479300057
PM 19518741
ER
PT J
AU Edlund, EM
Porkolab, M
Kramer, GJ
Lin, L
Lin, Y
Wukitch, SJ
AF Edlund, E. M.
Porkolab, M.
Kramer, G. J.
Lin, L.
Lin, Y.
Wukitch, S. J.
TI Observation of Reversed Shear Alfven Eigenmodes between Sawtooth Crashes
in the Alcator C-Mod Tokamak
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID AXISYMMETRICAL TOROIDAL PLASMAS; PROFILE; JT-60U
AB Groups of frequency chirping modes observed between sawtooth crashes in the Alcator C-Mod tokamak are interpreted as reversed shear Alfven eigenmodes near the q=1 surface. These modes indicate that a reversed shear q profile is generated during the relaxation phase of the sawtooth cycle. Two important parameters, q(min) and its radial position, are deduced from comparisons of measured density fluctuations with calculations from the ideal MHD code NOVA. These studies provide valuable constraints for further modeling of the sawtooth cycle.
C1 [Edlund, E. M.; Porkolab, M.; Lin, L.; Lin, Y.; Wukitch, S. J.] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA.
[Kramer, G. J.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Edlund, EM (reprint author), MIT, Plasma Sci & Fus Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
RI Lin, Yijun/B-5711-2009; Lin, Liang/H-2255-2011
FU U. S. DOE [DE-FC02-99-ER54512, DE-FC02-04ER54698]
FX We thank the Alcator C-Mod team for their support of these experiments.
We also acknowledge the contributions of Jesus Ramos, Peter Catto, Per
Helander, and Chuck Kessel for the valuable discussions of our modeling
and neoclassical transport theory. This work supported by the U. S. DOE
under Contracts No. DE-FC02-99-ER54512 and No. DE-FC02-04ER54698.
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 24
PY 2009
VL 102
IS 16
AR 165003
DI 10.1103/PhysRevLett.102.165003
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 437IC
UT WOS:000265479300035
PM 19518719
ER
PT J
AU Horava, P
AF Horava, Petr
TI Spectral Dimension of the Universe in Quantum Gravity at a Lifshitz
Point
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
AB We extend the definition of "spectral dimension" d(s) (usually defined for fractal and lattice geometries) to theories in spacetimes with anisotropic scaling. We show that in gravity with dynamical critical exponent z in D+1 dimensions, the spectral dimension of spacetime is d(s)=1+D/z. In the case of gravity in 3+1 dimensions with z=3 in the UV which flows to z=1 in the IR, the spectral dimension changes from d(s)=4 at large scales to d(s)=2 at short distances. Remarkably, this is the behavior found numerically by Ambjorn et al. in their causal dynamical triangulations approach to quantum gravity.
C1 [Horava, Petr] Univ Calif Berkeley, Berkeley Ctr Theoret Phys, Berkeley, CA 94720 USA.
[Horava, Petr] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Phys, Berkeley, CA 94720 USA.
RP Horava, P (reprint author), Univ Calif Berkeley, Berkeley Ctr Theoret Phys, Berkeley, CA 94720 USA.
FU NSF [PHY-0555662]; DOE [DE-AC0376SF00098]; BCTP
FX This work has been supported in part by NSF Grant No. PHY-0555662, U. S.
DOE Grant No. DE-AC0376SF00098, and the BCTP.
NR 26
TC 363
Z9 363
U1 1
U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 24
PY 2009
VL 102
IS 16
AR 161301
DI 10.1103/PhysRevLett.102.161301
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 437IC
UT WOS:000265479300009
PM 19518693
ER
PT J
AU Liu, C
Kondo, T
Ni, N
Palczewski, AD
Bostwick, A
Samolyuk, GD
Khasanov, R
Shi, M
Rotenberg, E
Bud'ko, SL
Canfield, PC
Kaminski, A
AF Liu, Chang
Kondo, Takeshi
Ni, Ni
Palczewski, A. D.
Bostwick, A.
Samolyuk, G. D.
Khasanov, R.
Shi, M.
Rotenberg, E.
Bud'ko, S. L.
Canfield, P. C.
Kaminski, A.
TI Three- to Two-Dimensional Transition of the Electronic Structure in
CaFe2As2: A Parent Compound for an Iron Arsenic High-Temperature
Superconductor
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID GAPS
AB We use angle-resolved photoemission spectroscopy (ARPES) to study the electronic properties of CaFe2As2-parent compound of a pnictide superconductor. We find that the structural and magnetic transition is accompanied by a three- to two-dimensional (3D-2D) crossover in the electronic structure. Above the transition temperature (T-s) Fermi surfaces around Gamma and X points are cylindrical and quasi 2D. Below T-s, the Gamma pocket forms a 3D ellipsoid, while the X pocket remains quasi 2D. This finding strongly suggests that low dimensionality plays an important role in understanding the superconducting mechanism in pnictides.
C1 [Liu, Chang; Kondo, Takeshi; Ni, Ni; Palczewski, A. D.; Samolyuk, G. D.; Bud'ko, S. L.; Canfield, P. C.; Kaminski, A.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
[Bostwick, A.; Rotenberg, E.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
[Khasanov, R.] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland.
[Shi, M.] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland.
RP Liu, C (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
RI Rotenberg, Eli/B-3700-2009; Bostwick, Aaron/E-8549-2010; Canfield,
Paul/H-2698-2014; Kondo, Takeshi/H-2680-2016;
OI Rotenberg, Eli/0000-0002-3979-8844; Khasanov, Rustem/0000-0002-4768-5524
FU Department of Energy - Basic Energy Sciences [DE-AC02-07CH11358]; US DOE
[DE-AC03-76SF00098.]
FX We thank J. Schmalian, M. A. Tanatar, and Rafael Fernandes for
insightful discussions and staff at SLS and ALS for excellent
instrumentation support. Ames Laboratory was supported by the Department
of Energy - Basic Energy Sciences under Contract No. DE-AC02-07CH11358.
ALS is operated by the US DOE under Contract No. DE-AC03-76SF00098.
NR 34
TC 66
Z9 66
U1 4
U2 32
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 24
PY 2009
VL 102
IS 16
AR 167004
DI 10.1103/PhysRevLett.102.167004
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 437IC
UT WOS:000265479300063
PM 19518747
ER
PT J
AU Lotay, G
Woods, PJ
Seweryniak, D
Carpenter, MP
Janssens, RVF
Zhu, S
AF Lotay, G.
Woods, P. J.
Seweryniak, D.
Carpenter, M. P.
Janssens, R. V. F.
Zhu, S.
TI Identification of Key Astrophysical Resonances Relevant for the
Al-26g(p,gamma)Si-27 Reaction in Wolf-Rayet Stars, AGB stars, and
Classical Novae
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID PROTON THRESHOLD STATES; EARLY SOLAR-SYSTEM; AL-26; FE-60; EMISSION;
SI-27
AB A gamma-ray spectroscopy study of Al-26g+p resonant states in Si-27 is presented. Excitation energies were measured with improved precision and first spin-parity assignments made for excited states in Si-27 above the proton threshold. The results indicate the presence of low-lying resonances with l(p)=0 and l(p)=2 captures that could strongly influence the Al-26g(p,gamma)Si-27 reaction rate at low stellar temperatures, found in low-mass asymptotic giant branch (AGB), intermediate-mass AGB, super AGB, and Wolf-Rayet stars.
C1 [Lotay, G.; Woods, P. J.] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
[Seweryniak, D.; Carpenter, M. P.; Janssens, R. V. F.; Zhu, S.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Lotay, G (reprint author), Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
RI Carpenter, Michael/E-4287-2015
OI Carpenter, Michael/0000-0002-3237-5734
FU U.S. DOE, Office of Nuclear Physics [DE-AC02-06CH11357]
FX The work was supported by the U.S. DOE, Office of Nuclear Physics,
Contract No. DE-AC02-06CH11357.
NR 24
TC 22
Z9 22
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 24
PY 2009
VL 102
IS 16
AR 162502
DI 10.1103/PhysRevLett.102.162502
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 437IC
UT WOS:000265479300019
PM 19518703
ER
PT J
AU Garcia-Barriocanal, J
Rivera-Calzada, A
Varela, M
Sefrioui, Z
Iborra, E
Leon, C
Pennycook, SJ
Santamaria, J
AF Garcia-Barriocanal, J.
Rivera-Calzada, A.
Varela, M.
Sefrioui, Z.
Iborra, E.
Leon, C.
Pennycook, S. J.
Santamaria, J.
TI Response to Comment on "Colossal Ionic Conductivity at Interfaces of
Epitaxial ZrO2:Y2O3/SrTiO3 Heterostructures"
SO SCIENCE
LA English
DT Editorial Material
AB Guo suggests that the reported ionic conductivity of ZrO2:Y2O3/SrTiO3 heterostructures might be due to the electronic conductivity from the SrTiO3. We point out shortcomings in his reasoning and underscore that our results show that any electronic contribution to the conductance is at least three orders of magnitude lower than the ionic contribution determined by ac methods.
C1 [Garcia-Barriocanal, J.; Rivera-Calzada, A.; Sefrioui, Z.; Leon, C.; Santamaria, J.] Univ Complutense Madrid, Grp Fis Mat Complejos, E-28040 Madrid, Spain.
[Varela, M.; Pennycook, S. J.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Iborra, E.] Univ Politecn Madrid, Escuela Tecn Super Ingenieros Telecomunicac, E-28040 Madrid, Spain.
RP Santamaria, J (reprint author), Univ Complutense Madrid, Grp Fis Mat Complejos, E-28040 Madrid, Spain.
EM jacsan@fis.ucm.es
RI Leon, Carlos/A-5587-2008; Varela, Maria/H-2648-2012; Varela,
Maria/E-2472-2014; Iborra, Enrique/A-4148-2016; Santamaria,
Jacobo/N-8783-2016; Sefrioui, Zouhair/C-2728-2017
OI Leon, Carlos/0000-0002-3262-1843; Varela, Maria/0000-0002-6582-7004;
Iborra, Enrique/0000-0002-1385-1379; Santamaria,
Jacobo/0000-0003-4594-2686; Sefrioui, Zouhair/0000-0002-6703-3339
NR 4
TC 16
Z9 16
U1 7
U2 68
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
J9 SCIENCE
JI Science
PD APR 24
PY 2009
VL 324
IS 5926
DI 10.1126/science.1169018
PG 1
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 436JU
UT WOS:000265411200026
ER
PT J
AU Miao, YQ
Wang, H
Shao, YY
Tang, ZW
Wang, J
Lin, YH
AF Miao, Yuqing
Wang, Hua
Shao, Yuyan
Tang, Zhiwen
Wang, Jun
Lin, Yuehe
TI Layer-by-layer assembled hybrid film of carbon nanotubes/iron oxide
nanocrystals for reagentless electrochemical detection of H2O2
SO SENSORS AND ACTUATORS B-CHEMICAL
LA English
DT Article
DE Carbon nanotube; Magnetic nanocystals; Peroxidase mimetics; H2O2
ID BIOMEDICAL APPLICATIONS; MAGNETIC NANOPARTICLES; MODIFIED ELECTRODE;
GLUCOSE DETECTION; THIONINE; BIOSENSOR; FE3O4; SURFACE
AB A new approach to construct a reagentless electrochemical H2O2 sensor is described. Iron oxide magnetic nanocystals (IOMNs), as peroxidase mimetics, were assembled to form a multilayer structure through the layer-by-layer (LBL) method. Polythionin (PTh) was first electrodeposited onto the glassy carbon electrode (GCE) surface to introduce amino groups. Carboxyl functionalized multi-walled carbon nanotubes (MWCNTs), amino functionalized IOMNs, and thionin monomers were alternatively anchored onto a polythionin-functionalized GCE surface in order by carbodiimide or glutaraldehyde chemistry. The resulting multilayer construction with three layers of IOMNs and thionin mediator exhibits excellent electrochemical response to the reduction of H2O2, whereas such a modified electrode with one layer construction only yields a slight response to H2O2 of the same concentration. The tethered MWCNTs enlarge the amount of immobilized ICMNs and effectively shuttle electrons between the electrode and the thionin. The calibration plot is linear over the wide H2O2 concentration range from 0.099 to 6.54 mM, with a detection limit of 53.6 mu M. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Miao, Yuqing] Zhejiang Normal Univ, Inst Phys Chem, Zhejiang Key Lab React Chem Solid Surfaces, Jinhua 321004, Peoples R China.
[Miao, Yuqing; Wang, Hua; Shao, Yuyan; Tang, Zhiwen; Wang, Jun; Lin, Yuehe] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Miao, YQ (reprint author), Zhejiang Normal Univ, Inst Phys Chem, Zhejiang Key Lab React Chem Solid Surfaces, Jinhua 321004, Peoples R China.
EM biosensors@zjnu.cn; Yuehe.Lin@pnl.gov
RI Shao, Yuyan/A-9911-2008; Lin, Yuehe/D-9762-2011
OI Shao, Yuyan/0000-0001-5735-2670; Lin, Yuehe/0000-0003-3791-7587
FU National Natural Science Foundation of China [90406016]; LDRD program at
Pacific Northwest National Laboratory (PNNL); U.S. Department of Energy
(DOE) [DE-AC05-76RL01830]
FX This material is based upon work funded partially by the National
Natural Science Foundation of China (Grant No. 90406016) and partially
by a LDRD program at Pacific Northwest National Laboratory (PNNL). The
work was performed at the Environmental Molecular Sciences Laboratory, a
national scientific user facility sponsored by the U.S. Department of
Energy (DOE) and located at PNNL. PNNL is operated by Battelle for DOE
under Contract DE-AC05-76RL01830.
NR 23
TC 29
Z9 32
U1 2
U2 29
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-4005
J9 SENSOR ACTUAT B-CHEM
JI Sens. Actuator B-Chem.
PD APR 24
PY 2009
VL 138
IS 1
BP 182
EP 188
DI 10.1016/j.snb.2008.12.045
PG 7
WC Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation
SC Chemistry; Electrochemistry; Instruments & Instrumentation
GA 439VU
UT WOS:000265656300029
ER
PT J
AU Mayer, AC
Toney, MF
Scully, SR
Rivnay, J
Brabec, CJ
Scharber, M
Koppe, M
Heeney, M
McCulloch, I
McGehee, MD
AF Mayer, A. C.
Toney, Michael F.
Scully, Shawn R.
Rivnay, Jonathan
Brabec, Christoph J.
Scharber, Marcus
Koppe, Marcus
Heeney, Martin
McCulloch, Iain
McGehee, Michael D.
TI Bimolecular Crystals of Fullerenes in Conjugated Polymers and the
Implications of Molecular Mixing for Solar Cells
SO ADVANCED FUNCTIONAL MATERIALS
LA English
DT Article
ID THIN-FILMS; PHOTOVOLTAIC CELLS; CARRIER MOBILITY; POLYTHIOPHENE;
PERFORMANCE; MORPHOLOGY; BLENDS; OXIDE
AB The performance of polymer:fullerene bulk heterojunction solar cells is heavily influenced by the interpenetrating nanostructure formed by the two semiconductors because the size of the phases, the nature of the interface, and molecular packing affect exciton dissociation, recombination, and charge transport. Here, X-ray diffraction is used to demonstrate the formation of stable, well-ordered bimolecular crystals of fullerene intercalated between the side-chains of the semiconducting polymer poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene. It is shown that fullerene intercalation is general and is likely to occur in blends with both amorphous and semicrystalline polymers when there is enough free volume between the side-chains to accommodate the fullerene molecule. These findings offer explanations for why luminescence is completely quenched in crystals much larger than exciton diffusion lengths, how the hole mobility of poly(2-methoxy-5-(3',7'dimethyloxy)-p-phylene vinylene) increases by over 2 orders of magnitude when blended with fullerene derivatives, and why large-scale phase separation occurs in some polymer:fullerene blend ratios while thermodynamically stable mixing on the molecular scale occurs for others. Furthermore, it is shown that intercalation of fullerenes between side chains mostly determines the optimum polymer:fullerene blending ratios. These discoveries suggest a method of intentionally designing bimolecular crystals and tuning their properties to create novel materials for photovoltaic and other applications.
C1 [Mayer, A. C.; Scully, Shawn R.; Rivnay, Jonathan; McGehee, Michael D.] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA.
[Toney, Michael F.] Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
[Brabec, Christoph J.; Scharber, Marcus; Koppe, Marcus] Konarka Technol Austria, A-4040 Linz, Austria.
[Heeney, Martin] Univ London, Dept Mat, London E1 4NS, England.
[McCulloch, Iain] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England.
RP Mayer, AC (reprint author), Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA.
EM mmcgehee@stanford.edu
RI Brabec, Christoph/N-1897-2013; Heeney, Martin/O-1916-2013; Scharber,
Markus Clark/N-4450-2016;
OI Heeney, Martin/0000-0001-6879-5020; Brabec, Christoph
J./0000-0002-9440-0253
NR 27
TC 288
Z9 291
U1 7
U2 114
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1616-301X
J9 ADV FUNCT MATER
JI Adv. Funct. Mater.
PD APR 23
PY 2009
VL 19
IS 8
BP 1173
EP 1179
DI 10.1002/adfm.200801684
PG 7
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 442QM
UT WOS:000265855700004
ER
PT J
AU Romo-Herrera, JM
Cullen, DA
Cruz-Silva, E
Ramirez, D
Sumpter, BG
Meunier, V
Terrones, H
Smith, DJ
Terrones, M
AF Romo-Herrera, Jose M.
Cullen, David A.
Cruz-Silva, Eduardo
Ramirez, Daniel
Sumpter, Bobby G.
Meunier, V.
Terrones, Humberto
Smith, David J.
Terrones, Mauricio
TI The Role of Sulfur in the Synthesis of Novel Carbon Morphologies: From
Covalent Y-Junctions to Sea-Urchin-Like Structures
SO ADVANCED FUNCTIONAL MATERIALS
LA English
DT Article
ID FLOATING CATALYST METHOD; VAPOR-PHASE; NANOTUBES; FIBERS; NANOFIBERS;
DEPOSITION; PRECURSORS; PYROLYSIS; MECHANISM
AB A detailed characterization, using high resolution electron microscopy/microanalysis (SEM, TEM, HRTEM, and EDX), reveals tubular carbon nanostructures exhibiting complex and fascinating morphologies. The materials were obtained by sulfur-assisted chemical vapor deposition. It is demonstrated that S not only acts on the catalyst, but also can be detected in the carbon lattice of the nanostructures. The experimental data presented here confirms the critical role of S, which is responsible for inducing curvature and therefore influencing the final carbon nanostructure morphology. In particular, different types of covalent Y-junctions of CNTs and even sea urchin-like nanostructures were produced and their experimental conditions are listed and discussed.
C1 [Romo-Herrera, Jose M.; Cullen, David A.; Cruz-Silva, Eduardo; Ramirez, Daniel; Terrones, Mauricio] IPICyT, LINAN, San Luis Potosi 78216, Mexico.
[Cullen, David A.; Smith, David J.] Arizona State Univ, Sch Mat, Tempe, AZ 85287 USA.
[Romo-Herrera, Jose M.; Cruz-Silva, Eduardo; Ramirez, Daniel; Terrones, Humberto; Terrones, Mauricio] IPICyT, Adv Mat Dept, San Luis Potosi 78216, Mexico.
[Cullen, David A.; Smith, David J.] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA.
[Sumpter, Bobby G.; Meunier, V.] Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA.
[Sumpter, Bobby G.; Meunier, V.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Romo-Herrera, JM (reprint author), IPICyT, LINAN, Camino Presa San lose 2055,Col Lomas 4 Secc, San Luis Potosi 78216, Mexico.
EM mterrones@titan.ipicyt.edu.mx
RI Cruz-Silva, Eduardo/B-7003-2009; Meunier, Vincent/F-9391-2010; Sumpter,
Bobby/C-9459-2013; Terrones, Mauricio/B-3829-2014; Cullen,
David/A-2918-2015
OI Cruz-Silva, Eduardo/0000-0003-2877-1598; Meunier,
Vincent/0000-0002-7013-179X; Sumpter, Bobby/0000-0001-6341-0355; Cullen,
David/0000-0002-2593-7866
NR 25
TC 27
Z9 27
U1 1
U2 21
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1616-301X
J9 ADV FUNCT MATER
JI Adv. Funct. Mater.
PD APR 23
PY 2009
VL 19
IS 8
BP 1193
EP 1199
DI 10.1002/adfm.200800931
PG 7
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 442QM
UT WOS:000265855700007
ER
PT J
AU Cook, BA
Kramer, MJ
Harringa, JL
Han, MK
Chung, DY
Kanatzidis, MG
AF Cook, Bruce A.
Kramer, Matthew J.
Harringa, Joel L.
Han, Mi-Kyung
Chung, Duck-Young
Kanatzidis, Mercouri G.
TI Analysis of Nanostructuring in High Figure-of-Merit Ag1-xPbmSbTe2+m
Thermoelectric Materials
SO ADVANCED FUNCTIONAL MATERIALS
LA English
DT Article
ID QUANTUM-DOT SUPERLATTICE; SILICON-GERMANIUM ALLOYS;
THERMAL-CONDUCTIVITY; TRANSPORT-PROPERTIES; AGPBMSBTE2+M; PERFORMANCE;
GLASSES; DEVICES
AB Thermoelectric materials. based on. quaternary compounds Ag1-xPbmSbTe2+m exhibit high dimensionless figure-of-merit values, ranging from 1.5 to 1.7 at 700 K. The primary factor contributing to the High figure of merit is a low lattice thermal conductivity, achieved through nanostructuring during melt solidification. As a.consequence of nucleation and growth of a second phase; coherent nanoscale inclusions form throughout the material, which are believed to result in scattering of acoustic phonons while causing only minimal scattering of charge carriers. Here, characterization of the nanosized inclusions in Ag0.53Pb18Sb1.2Te20 that shows a strong tendency for crystallographic orientation along the {001} planes, with a high degree of lattice strain at the interface, consistent with a coherent interfacial boundary is reported. The inclusions are enriched in Ag relative to the matrix, and seem to adopt a cubic, 96 atom per unit cell Ag2Te phase based on the Ti2Ni type structure. In-situ high-temperature synchrotron radiation diffraction studies indicated that the inclusions remain thermally stable to at least 800 K.
C1 [Cook, Bruce A.; Harringa, Joel L.] Iowa State Univ, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA.
[Han, Mi-Kyung; Kanatzidis, Mercouri G.] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
[Chung, Duck-Young; Kanatzidis, Mercouri G.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Cook, BA (reprint author), Iowa State Univ, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA.
EM m-kanatzidis@northwestern.edu
FU Office of Naval Research [N00014-05-IP-20065, N00014-03-1-0789]; US
Department of Energy, Office of Science, Basic Energy Sciences
[DE-AC02-06CH11357]
FX This project was supported by the Office of Naval Research, contract no.
N00014-05-IP-20065, and N00014-03-1-0789 (MURI) monitored by Dr. Mihal
Gross. This manuscript has been authored by Iowa State University of
Science and Technology under Contract No. DE-AC02-07CH11358 with the
U.S. Department of Energy. The high-energy X-ray work at the Midwest
Universities Collaborative Access Team sector of the APS was supported
by the US Department of Energy, Office of Science, Basic Energy Sciences
under Contract No. DE-AC02-06CH11357. The authors wish to thank E. Timm
and H. Schock of Michigan State University for providing a specimen for
this study and to M. Gross for her suggestion to apply amorphous carbon
to the high-temperature TEM foils.
NR 32
TC 62
Z9 62
U1 3
U2 30
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1616-301X
J9 ADV FUNCT MATER
JI Adv. Funct. Mater.
PD APR 23
PY 2009
VL 19
IS 8
BP 1254
EP 1259
DI 10.1002/adfm.200801284
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 442QM
UT WOS:000265855700016
ER
PT J
AU Gee, MW
Dohrmann, CR
Key, SW
Wall, WA
AF Gee, M. W.
Dohrmann, C. R.
Key, S. W.
Wall, W. A.
TI A uniform nodal strain tetrahedron with isochoric stabilization
SO INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
LA English
DT Article
DE uniform strain; tetrahedra elements; finite elements; stabilization;
finite elasticity
ID FINITE-ELEMENT; FORMULATION
AB A stabilized node-based uniform strain tetrahedral element is presented and analyzed for finite deformation elasticity. The element is based on linear interpolation of a classical displacement-based tetrahedral element formulation but applies nodal averaging of the deformation gradient to improve mechanical behavior, especially in the regime of near-incompressibility where classical linear tetrahedral elements perform very poorly. This uniform strain approach adopted here exhibits spurious modes as has been previously reported in the literature. We present a new type of stabilization exploiting the circumstance that the instability in the formulation is related to the isochoric strain energy contribution only and we therefore present a stabilization based on an isochoric-volumetric splitting of the stress tensor. We demonstrate that by stabilizing the isochoric energy contributions only, reintroduction of volumetric locking through the stabilization can be avoided. The isochoric-volumetric splitting can be applied for all types of materials with only minor restrictions and leads to a formulation that demonstrates impressive performance in examples provided. Copyright (C) 2008 John Wiley & Sons, Ltd.
C1 [Gee, M. W.; Wall, W. A.] Tech Univ Munich, Chair Computat Mech, D-85747 Garching, Germany.
[Dohrmann, C. R.] Sandia Natl Labs, Struct Dynam Dept, Albuquerque, NM 87185 USA.
[Key, S. W.] Sandia Natl Labs, Engn & Mfg Dept, Albuquerque, NM 87185 USA.
RP Gee, MW (reprint author), Tech Univ Munich, Chair Computat Mech, Boltzmannstr 15, D-85747 Garching, Germany.
EM gee@lnm.mw.tum.de
RI Gee, Michael/G-1490-2012; Wall, Wolfgang/I-3787-2012
OI Wall, Wolfgang/0000-0001-7419-3384
FU United States Department of Energy [DE-AC04-94-AL85000]
FX Contract/grant sponsor: United States Department of Energy;
contract/grant number: DE-AC04-94-AL85000
NR 13
TC 26
Z9 26
U1 0
U2 9
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 0029-5981
J9 INT J NUMER METH ENG
JI Int. J. Numer. Methods Eng.
PD APR 23
PY 2009
VL 78
IS 4
BP 429
EP 443
DI 10.1002/nme.2493
PG 15
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications
SC Engineering; Mathematics
GA 434YS
UT WOS:000265310800003
ER
PT J
AU Yu, HG
Francisco, JS
AF Yu, Hua-Gen
Francisco, Joseph S.
TI Theoretical Study of the Reaction of CH3 with HOCO Radicals
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID POTENTIAL-ENERGY SURFACE; CO REACTANT COMPLEX; CORRELATED MOLECULAR
CALCULATIONS; INITIO QUANTUM SCATTERING; COUPLED-CLUSTER METHODS;
GAUSSIAN-BASIS SETS; AB-INITIO; RATE CONSTANTS; PRESSURE RANGE;
TEMPERATURE-DEPENDENCE
AB The reaction of HOCO radicals with CH3 radicals is examined using the coupled cluster method to locate and optimize the critical points on the ground-state potential energy surface. The results show that the CH3 + HOCO reaction can produce both the H2O + CH2CO and the CH4 + CO2 products through acetic acid and enediol intermediates. Direct ab initio dynamics calculations determine the thermal rate coefficients to be k(T/K) = 3.24 x 10(-11)T(0.1024) in cm(3).molec(-1).s(-1) at T <= 1000 K for the overall reaction. In addition, the product branching ratio of (H2O + CH2CO) to (CH4 + CO2) is predicted to be R-H2O/CH4(T/K) = 1.52 + (1.95 X 10(-4))T using RRKM theory. Both the thermal rate coefficients and the product branching ratios are weakly temperature dependent.
C1 [Francisco, Joseph S.] Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA.
[Yu, Hua-Gen] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
RP Francisco, JS (reprint author), Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA.
EM francisc@purdue.edu
RI Yu, Hua-Gen/N-7339-2015
FU Brookhaven National Laboratory [DE-AC02-98CH10886]; National Energy
Research Scientific Computing Center (NERSC)
FX This work was performed at Brookhaven National Laboratory under contract
no. DE-AC02-98CH10886 with the U.S. Department of Energy and supported
by its Division of Chemical Sciences, Office of Basic Energy Sciences.
Some calculations were carried out at the National Energy Research
Scientific Computing Center (NERSC) at Lawrence Berkeley National
Laboratory.
NR 75
TC 10
Z9 10
U1 1
U2 8
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD APR 23
PY 2009
VL 113
IS 16
BP 3844
EP 3849
DI 10.1021/jp809730j
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 435ZU
UT WOS:000265383200018
PM 19203198
ER
PT J
AU Zhai, HJ
Wang, B
Huang, X
Wang, LS
AF Zhai, Hua-Jin
Wang, Bin
Huang, Xin
Wang, Lai-Sheng
TI Probing the Electronic and Structural Properties of the Niobium Trimer
Cluster and Its Mono- and Dioxides: Nb3On- and Nb3On (n=0-2)
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID TRANSITION-METAL OXIDE; DENSITY-FUNCTIONAL CALCULATIONS; AB-INITIO
CALCULATIONS; PHOTOELECTRON-SPECTROSCOPY; BASIS-SETS;
IONIZATION-POTENTIALS; CATALYTIC ACTIVATION; PRIMARY ALCOHOLS; NB(110)
SURFACE; IRON CLUSTERS
AB We report a photoelectron spectroscopy and density functional theory (DFT) study on the electronic and structural properties of Nb-3(-), Nb3O-, Nb3O2-, and the corresponding neutrals. Well-resolved photoelectron spectra are obtained for the anion clusters at different photon energies and are compared with DFT calculations to elucidate their structures and chemical bonding. We find that Nb-3(-) possesses a C-2v((3)A(2)) structure, and Nb-3 is a scalene C-s ((2)A '') triangle. Both Nb3O- and Nb3O are found to have C-2v structures, in which the O atom bridges two Nb atoms in a Nb-3 triangle. The ground-state of Nb3O2- is found surprisingly to be a low symmetry C-1 ((1)A) structure, which contains a bridging and a terminal O atom. Molecular orbital analyses are carried out to understand the structures and bonding of the three clusters and provide insights into the sequential oxidation from Nb-3(-) to Nb3O2-. The terminal Nb=O unit is common in niobia catalysts, and the Nb3O2- cluster with a Nb=O unit may be viewed as a molecular model for the catalytic sites or the initial oxidation of a Nb surface.
C1 [Wang, Bin; Huang, Xin] Fuzhou Univ, Dept Chem, Fuzhou 350108, Fujian, Peoples R China.
[Wang, Bin; Huang, Xin] State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China.
[Zhai, Hua-Jin; Wang, Lai-Sheng] Washington State Univ, Dept Phys, Richland, WA 99354 USA.
[Zhai, Hua-Jin; Wang, Lai-Sheng] Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA.
RP Huang, X (reprint author), Fuzhou Univ, Dept Chem, Fuzhou 350108, Fujian, Peoples R China.
EM xhuang@fzu.edu.cn; ls.wang@pnl.gov
FU Chemical Sciences, Geosciences, and Biosciences Division; Office of
Basic Energy Sciences, U.S. Department of Energy (DOE) [DE-FG02-03ER
15481]; Natural Science Foundation of China [20641004, 20771026];
Natural Science Foundation of Fujian Province of China [2008J0151]
FX The experimental work was supported by the Chemical Sciences,
Geosciences, and Biosciences Division, Office of Basic Energy Sciences,
U.S. Department of Energy (DOE), under grant No. DE-FG02-03ER 15481
(catalysis center program) and performed at the W. R. Wiley
Environmental Molecular Sciences Laboratory, a national scientific user
facility sponsored by DOE's Office of Biological and Environmental
Research and located at Pacific Northwest National Laboratory, operated
for DOE by Battelle. X.H. gratefully acknowledges support from the
Natural Science Foundation of China (20641004 and 20771026) and the
Natural Science Foundation of Fujian Province of China (No. 2008J0151).
NR 73
TC 43
Z9 43
U1 4
U2 16
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD APR 23
PY 2009
VL 113
IS 16
BP 3866
EP 3875
DI 10.1021/jp809945n
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 435ZU
UT WOS:000265383200020
PM 19371107
ER
PT J
AU Shuford, KL
Meyer, KA
Li, CC
Cho, SO
Whitten, WB
Shaw, RW
AF Shuford, Kevin L.
Meyer, Kent A.
Li, Cuncheng
Cho, Sung Oh
Whitten, William B.
Shaw, Robert W.
TI Computational and Experimental Evaluation of Nanoparticle Coupling
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID ENHANCED RAMAN-SCATTERING; DISCRETE-DIPOLE APPROXIMATION; PLASMON
RESONANCES; GOLD NANOPARTICLES; COLLOIDAL SOLUTION; OPTICAL-PROPERTIES;
SURFACE; SPECTROSCOPY; MOLECULES; NANOSTRUCTURES
AB We present theoretical and experimental studies on the optical properties of dimers composed of octahedron-shaped, gold nanoparticles. The experimental measurements show that the photoluminescence varies quite dramatically as two octahedra are brought into close proximity. AFM images and optical emission have been recorded for dimers in uncoupled and strongly coupled configurations. The former displays a single emission peak, while the latter shows two peaks with the new feature at longer wavelengths. Calculations indicate that the red-shifted peak originates from a strongly coupled plasmon state that oscillates along the extended axis of the dimer. Theoretically, we investigate the distances over which the dimers couple and find this to be particularly plasmon mode dependent. The anisotropic morphology and sharp apexes contribute significantly to the orientational dependence of the interparticle couplings and field properties.
C1 [Shuford, Kevin L.; Meyer, Kent A.; Whitten, William B.; Shaw, Robert W.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
[Li, Cuncheng; Cho, Sung Oh] Korea Adv Inst Sci & Technol, Dept Nucl & Quantum Engn, Taejon 305701, South Korea.
RP Shuford, KL (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM shufordkl@ornl.gov
RI Cho, Sung Oh/C-1603-2011; Shuford, Kevin/L-2435-2014
FU Division of Chemical Sciences, Biosciences, and Geosciences, Office of
Basic Energy Sciences, U.S. Department of Energy [DE-AC05-00OR22725];
Korean government (MOST)
FX We are delighted to contribute to this issue honoring the life and work
of George C. Schatz. One of us (K.L.S.) had the pleasure of working with
George as a postdoctoral associate for three wonderful years at
Northwestern University. This was a period of huge growth scientifically
and personally for me, and I attribute this to the constant guidance and
encouragement received. George's kind nature and towering intellect are
a joy to all that know him.; This research was supported by the Division
of Chemical Sciences, Biosciences, and Geosciences, Office of Basic
Energy Sciences, U.S. Department of Energy under contract
DE-AC05-00OR22725 with Oak Ridge National Laboratory, managed and
operated by UT-Battelle, LLC. SOC was supported by a Korea Science and
Engineering Foundation (KOSEF) grant funded by the Korean government
(MOST).
NR 25
TC 8
Z9 8
U1 1
U2 14
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD APR 23
PY 2009
VL 113
IS 16
BP 4009
EP 4014
DI 10.1021/jp810398s
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 435ZU
UT WOS:000265383200038
PM 19209878
ER
PT J
AU Martinson, ABF
Goes, MS
Fabregat-Santiago, F
Bisquert, J
Pellin, MJ
Hupp, JT
AF Martinson, Alex B. F.
Goes, Marcio S.
Fabregat-Santiago, Francisco
Bisquert, Juan
Pellin, Michael J.
Hupp, Joseph T.
TI Electron Transport in Dye-Sensitized Solar Cells Based on ZnO Nanotubes:
Evidence for Highly Efficient Charge Collection and Exceptionally Rapid
Dynamics
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID ATOMIC LAYER DEPOSITION; IMPEDANCE SPECTROSCOPY; OXIDE-FILMS; TIO2;
RECOMBINATION; SEMICONDUCTORS; CONVERSION; DENSITY; CAPACITANCE;
DIFFUSION
AB Dye-sensitized solar cells based on ordered arrays of polycrystalline ZnO nanotubes, 64 mu m in length, are shown to exhibit efficient electron collection over the entire photoanode array length. Electrochemical impedance spectroscopy, open-circuit photovoltage decay analysis, and incident-photon-to-current efficiency spectra are used to quantify charge transport and lifetimes. Despite the relatively thick photoanode, the charge extraction time is found to be faster than observed in traditional TiO(2) nanoparticle photoanodes. If the extraction dynamics are interpreted as diffusive, effective electron diffusion coefficients of up to 0.4 cm(2) s(-1) are obtained, making these pseudo-ID photoanodes the fastest reported for an operating DSC to date. Rapid electron collection is of practical significance because it should enable alternative redox shuttles, which display relatively fast electron-interception dynamics, to be employed without significant loss of photocurrent.
C1 [Goes, Marcio S.; Fabregat-Santiago, Francisco; Bisquert, Juan] Univ Jaume 1, Dept Fis, Castellon de La Plana 12071, Spain.
[Martinson, Alex B. F.; Pellin, Michael J.; Hupp, Joseph T.] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
[Martinson, Alex B. F.; Pellin, Michael J.; Hupp, Joseph T.] Northwestern Univ, Argonne NW Solar Energy Res Ctr, Evanston, IL 60208 USA.
[Martinson, Alex B. F.; Pellin, Michael J.; Hupp, Joseph T.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Goes, Marcio S.] Univ Estadual Paulista, Dept Fisicoquim, Inst Quim Araraquara, BR-14800900 Araraquara, SP, Brazil.
RP Bisquert, J (reprint author), Univ Jaume 1, Dept Fis, Av Sos Baynat S-N, Castellon de La Plana 12071, Spain.
EM bisquert@fca.uji.es; j-hupp@northwestern.edu
RI Pellin, Michael/B-5897-2008; Sousa Goes, Marcio/E-5009-2012; Hupp,
Joseph/K-8844-2012; Bisquert, Juan/O-2543-2013; Fabregat-Santiago,
Francisco/K-9679-2014;
OI Pellin, Michael/0000-0002-8149-9768; Hupp, Joseph/0000-0003-3982-9812;
Bisquert, Juan/0000-0003-4987-4887; Fabregat-Santiago,
Francisco/0000-0002-7503-1245; Martinson, Alex/0000-0003-3916-1672
FU U.S. Department of Energy, Basic Energy Sciences Program
[DE-FG02-87ER13808]; U.S. Department of Energy [W-31-109-ENG-38];
Ministerio de Ciencia e Innovacion [MAT2007-62982, HOPE CSD2007-00007];
CNPq - Brasil [201516/2007-1]
FX We dedicate this paper to our friend and Colleague George Schatz on the
occasion of his 60th birthday. The work at Northwestern is supported by
the U.S. Department of Energy, Basic Energy Sciences Program, under
Grant No. DE-FG02-87ER13808. Work at Argonne is supported by the U.S.
Department of Energy, BES-Materials Sciences, under Contract No.
W-31-109-ENG-38. Work at Universitat Jaume I is supported by Ministerio
de Ciencia e Innovacion under Project Nos. MAT2007-62982 and HOPE
CSD2007-00007 (Consolider-Ingenio 2010). M.S.G. thanks CNPq - Brasil for
the fellowship (201516/2007-1).
NR 44
TC 192
Z9 193
U1 4
U2 85
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD APR 23
PY 2009
VL 113
IS 16
BP 4015
EP 4021
DI 10.1021/jp810406q
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 435ZU
UT WOS:000265383200039
PM 19371110
ER
PT J
AU Takahashi, LK
Zhou, J
Wilson, KR
Leone, SR
Ahmed, M
AF Takahashi, Lynelle K.
Zhou, Jia
Wilson, Kevin R.
Leone, Stephen R.
Ahmed, Musahid
TI Imaging with Mass Spectrometry: A Secondary Ion and VUV-Photoionization
Study of Ion-Sputtered Atoms and Clusters from GaAs and Au
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID POST-IONIZATION; TOF-SIMS; ELECTRONIC-STRUCTURES; LASER POSTIONIZATION;
HIGH-RESOLUTION; METAL-CLUSTERS; ENERGY; SILVER; GOLD; BOMBARDMENT
AB A new mass spectrometry surface imaging method is presented in which ion-sputtered neutrals are postionized by wavelength-tunable vacuum ultraviolet (VUV) light from a synchrotron source. Mass spectra and signal counts of the photoionized neutrals from GaAs (100) and Au are compared to those of the secondary ions. While clusters larger than dimers are more efficiently detected as secondary ions, certain species, such as As(2), Au, and Au(2), are more efficiently detected through the neutral channel. Continuously tuning the photon wavelength allows photoionization efficiency (PIE) curves to be obtained for sputtered As(m) (m = 1,2) and Au(n) (n = 1-4). From the observed ionization thresholds, sputtered neutral As and An show no clear evidence of electronic excitation, while neutral clusters have photoionization onsets shifted to lower energies by similar to 0.3 eV. These shifts are attributed to unresolved vibrational and rotational excitations. High-spatial resolution chemical imaging with synchrotron VUV postionization is demonstrated at two different photon energies using a copper TEM grid embedded in indium. The resulting images are used to illustrate the use of tunable VUV light for verifying mass peak assignments by exploiting the unique wavelength-dependent PIE of each sputtered neutral species. This capability is valuable for identifying compounds when imaging chemically complex systems with mass spectrometry-based techniques.
C1 [Takahashi, Lynelle K.; Zhou, Jia; Wilson, Kevin R.; Leone, Stephen R.; Ahmed, Musahid] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
[Takahashi, Lynelle K.; Leone, Stephen R.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Leone, Stephen R.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RP Ahmed, M (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
EM mahmed@lbl.gov
RI Ahmed, Musahid/A-8733-2009
FU Office of Energy Research, Office of Basic Energy Sciences, and Chemical
Sciences Division of the U.S. Department of Energy [DE-AC02-05CH11231]
FX Several authors (S.R.L., K.R.W., M.A.) have benefitted enormously from
highly productive collaborations and joint mentoring of students with
George Schatz over the years. Special thanks go to Leonid Belau, Andreas
Wucher, Joe Kazole, and Nicholas Winograd for their initial experimental
work with synchrotron VUV postionization, to Monroe Thomas for his
extensive help in Coupling the TOF.SIMS 5 to the beamline, and to
ION-TOF Inc. for their ongoing cooperation and support. We would also
like to thank Oleg Kostko for taking measurements for our light
wavelength calibrations, Hendrik, Bluhm and Yaroslav Romanyuk for
providing the samples on short notice, and Ricardo Metz for helpful
discussions about vibrational temperatures. This work was supported by
the Director, Office of Energy Research, Office of Basic Energy
Sciences, and Chemical Sciences Division of the U.S. Department of
Energy under contract no. DE-AC02-05CH11231. S.R.L. gratefully
acknowledges the support of a Morris Belkin Visiting Professorship at
the Weizmann Institute of Science.
NR 48
TC 17
Z9 17
U1 0
U2 14
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD APR 23
PY 2009
VL 113
IS 16
BP 4035
EP 4044
DI 10.1021/jp810408v
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 435ZU
UT WOS:000265383200042
PM 19371112
ER
PT J
AU Long, H
King, PW
Ghirardi, ML
Kim, K
AF Long, Hai
King, Paul W.
Ghirardi, Maria L.
Kim, Kwiseon
TI Hydrogenase/Ferredoxin Charge-Transfer Complexes: Effect of Hydrogenase
Mutations on the Complex Association
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID CHLAMYDOMONAS-REINHARDTII CULTURES; MOLECULAR-DYNAMICS; BROWNIAN
DYNAMICS; GREEN-ALGA; FERREDOXIN-NADP(+) REDUCTASE; METABOLIC PATHWAYS;
GENE-EXPRESSION; PHOTOPRODUCTION; ENERGY; H-2
AB The [FeFe]-hydrogenases in the green alga Chlamydomonas reinhardtii utilize photogenerated electrons to reduce protons into hydrogen gas. The electrons are supplied from photosystem I and transferred to the [FeFe]hydrogenase through specific hydrogenase-ferredoxin association. To understand how structural and kinetic factors control the association better, we used Brownian dynamics simulation methods to simulate the charge-transfer complex formation between both native and in silico mutants of the [FeFe]-hydrogenase HYDA2 and the [2Fe2S]-ferredoxin FDX1 from C. reinhardtii. The chances in binding free energy between different HYDA2 mutants and the native FDX1 were calculated by the free-energy perturbation method. Within the limits of our current models, we found that two HYDA2 mutations, T99K(H) and D102K(H), led to lower binding free energies and higher association rate with FDX1 and are thus promising targets for improving hydrogen production rates in engineered organisms.
C1 [Long, Hai; King, Paul W.; Ghirardi, Maria L.; Kim, Kwiseon] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Kim, K (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM kwiseon-kim@nrel.gov
RI King, Paul/D-9979-2011; Long, Hai/C-5838-2015
OI King, Paul/0000-0001-5039-654X;
FU U.S. Department of Energy's National Renewable Energy Laboratory (NREL)
FX We thank Jordi Cohen and Professor Klaus Schulten for the modified NAMD
FEP codes and Dr. Christopher Chang for providing us with the charge and
force field parameters of the metalloclusters. This work was supported
by the Laboratory-Directed Research and Development Program of the U.S.
Department of Energy's National Renewable Energy Laboratory (NREL).
Computing resources at the NREL Scientific Computing Center were used in
this work.
NR 40
TC 16
Z9 17
U1 0
U2 17
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD APR 23
PY 2009
VL 113
IS 16
BP 4060
EP 4067
DI 10.1021/jp810409z
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 435ZU
UT WOS:000265383200044
PM 19317477
ER
PT J
AU Kim, HS
Stair, PC
AF Kim, Hack-Sung
Stair, Peter C.
TI Resonance Raman Spectroscopic Study of Alumina-Supported Vanadium Oxide
Catalysts with 220 and 287 nm Excitation
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID X-RAY-ABSORPTION; DIFFUSE-REFLECTANCE SPECTROSCOPY;
SCCC-MO-CALCULATIONS; VIBRATIONAL-SPECTRA; MOLECULAR-STRUCTURE;
GAMMA-ALUMINA; LASER RAMAN; OXIDATIVE DEHYDROGENATION;
INFRARED-SPECTROSCOPY; INORGANIC-CHEMISTRY
AB We present detailed resonance Raman spectroscopic results excited at 220 and 287 nm for alumina-supported VOx catalysts. The anharmonic constant, harmonic wavenumber, anharmonic force constant, bond dissociation energy, and bond length chance in the excited state for double bonded V=O and single bonded V-O were obtained from fundamental and overtone frequencies. Totally symmetric and nontotally symmetric modes could be discerned and assigned on the basis of the overtone and combination progressions found in the resonance Raman spectra. Selective resonance enhancement of two different vibrational modes with two different excitation wavelengths was observed. This allowed us to establish a linear relationship between charge transfer energy and VO bond length and, consequently, to assign the higher-energy charge transfer band centered around 210-250 nm in the UV-vis spectra to the V=O transition.
C1 [Stair, Peter C.] Northwestern Univ, Dept Chem, Ctr Catalysis & Surface Sci, Evanston, IL 60208 USA.
Northwestern Univ, Inst Catalysis & Energy Proc, Evanston, IL 60208 USA.
Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Stair, PC (reprint author), Northwestern Univ, Dept Chem, Ctr Catalysis & Surface Sci, Evanston, IL 60208 USA.
EM pstair@northwestern.edu
FU U.S. Department of Energy, BES-Chemical Sciences [W-31-109-ENG-38]
FX H.-S.K. thanks Dr. Zili Wit for supplying the samples used in the
published paper. "This work was performed at Argonne National Laboratory
supported by the U.S. Department of Energy, BES-Chemical Sciences under
contract W-31-109-ENG-38.
NR 98
TC 23
Z9 23
U1 3
U2 18
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD APR 23
PY 2009
VL 113
IS 16
BP 4346
EP 4355
DI 10.1021/jp811019c
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 435ZU
UT WOS:000265383200079
PM 19256473
ER
PT J
AU Nome, RA
Guffey, MJ
Scherer, NF
Gray, SK
AF Nome, Rene A.
Guffey, Mason J.
Scherer, Norbert F.
Gray, Stephen K.
TI Plasmonic Interactions and Optical Forces between Au Bipyramidal
Nanoparticle Dimers
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID NEAR-FIELD; DIPOLE APPROXIMATION; METAL NANOPARTICLES; GOLD NANORODS;
PARTICLES; RESONANCES; MONOLAYERS; SCATTERING; DISTANCE; SINGLE
AB Interparticle forces that can be driven by applied (optical) fields could lead to the formation of new particle arrangements when assembled in arrays. Furthermore, the potentially large interactions and large local fields associated with plasmon excitations in anisotropic nanoparticles can lead to enhanced nonlinear responses and applications for sensing. These and other applications would benefit from simulations of spectra and forces arising from plasmonic interactions. We present the results of rigorous three-dimensional, finite-difference, time-domain calculations of near- and far-field properties of pairs of Au bipyramidal nanoparticles in three different configurations: side-by-side, head-to-tail, and face-on. The absorption and scattering spectra depend strongly on the geometry as well as on the interparticle separation, as intuitively expected from a dipole coupling picture. Bipyramidal dimers in head-to-tail and face-on geometries exhibit an increasingly red-shifted (longitudinal) plasmon resonance with decreasing separation, whereas side-by-side dimers exhibit a blue shift. Large resonant field enhancements at the gap between particles in a head-to-tail configuration indicate the strong coupling of plasmonic modes. The Maxwell stress tensor formalism is employed to calculate the optical force one particle exerts on the other. Both significant attraction and weak repulsion can be obtained, depending on the relative arrangement of the particles. The force between bipyramids in the head-to-tail configuration can be greater than 10 times the force between pairs of Au nanospheres with the same volume. Experimental linear scattering spectra of particles trapped using the plasmon-resonance-based optical trapping method are found to be consistent with two particles trapped in the side-by-side configuration.
C1 [Gray, Stephen K.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
[Guffey, Mason J.; Scherer, Norbert F.] Univ Chicago, Dept Chem, James Franck Inst, Chicago, IL 60637 USA.
[Nome, Rene A.; Scherer, Norbert F.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Gray, SK (reprint author), Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
EM gray@tcg.anl.gov
RI Nome, Rene/E-6714-2012
FU U.S. Department of Energy, Office of Science, Offices of Basic Energy
Sciences [DE-AC02-06CH11357]; National Science Foundation [CHE-0317009]
FX We thank Gary Wiederrecht for insightful conversations, Tom Spears for
his role in building the femtosecond laser system, and Tae-Woo Lee and
Mingzhao Liu for assistance with the FDTD calculations. Work at Argonne
National Laboratory was supported by the U.S. Department of Energy,
Office of Science, Offices of Basic Energy Sciences, under Contract No.
DE-AC02-06CH11357. NFS was supported by the National Science Foundation
(CHE-0317009).
NR 42
TC 40
Z9 41
U1 0
U2 41
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD APR 23
PY 2009
VL 113
IS 16
BP 4408
EP 4415
DI 10.1021/jp811068j
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 435ZU
UT WOS:000265383200087
PM 19267445
ER
PT J
AU Selllevag, SR
Georgievskii, Y
Miller, JA
AF Selllevag, Stig R.
Georgievskii, Yuri
Miller, James A.
TI Kinetics of the Gas-Phase Recombination Reaction of Hydroxyl Radicals to
Form Hydrogen Peroxide
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID CORRELATED MOLECULAR CALCULATIONS; INDUCED FLUORESCENCE MEASUREMENTS;
POTENTIAL-ENERGY SURFACE; TRANSITION-STATE THEORY; RATE CONSTANTS
K(E,J); HIGH-PRESSURE RANGE; GAUSSIAN-BASIS SETS; METHANOL
DECOMPOSITION; TURBINE CONDITIONS; CHEMICAL-KINETICS
AB The potential energy hypersurface (PES) of the reaction OH + OH (+M) -> H2O2 (+M) has been investigated at the CASPT2/aug-cc-pVDZ and CASPT2/aug-cc-pVTZ levels of theory. The PES is characterized by a barrier below the energy of the reactants and a hydrogen-bonded adduct formed by the OH radicals. On the basis of the potential energy hypersurface obtained, the high-pressure limiting rate coefficient (L) of the reaction was calculated using variable reaction coordinate transition-state theory, classical trajectory simulations, and a two-transition-state model. Over the temperature range of 200-3000 K, k(infinity)(T) = 9.3 x 10(-9)T(-1.040) exp(3.5/T) + 1.13 x 10(-12) T-0.313 exp(84/T) cm(3) molecule(-1) s(-1) is reported. Available experimental data on the pressure dependence of the reaction with He and Ar as bath gases were analyzed using a two-dimensional master equation. Over the temperature range of 200-3000 K, the following low-pressure limiting rate coefficient (k(0)) and center broadening factor (F-cent) were obtained for He as the bath gas: k(0)(T) = 4.4 x 10(-20)T(-4.30) exp(-340/T) cm(6) molecule(-2) s(-1) and F-cent = 0.54. For the dissociation of H2O2 in Ar, the following values are reported over the temperature range of 500-3000 K: k(0)(T) = 1.4 x 10(8)T(-4.57) exp(-26322/T) cm(3) molecule(-1) s(-1) and F-cent = 0.55. The calculations describe all experimental data well, except the observations at 210 K for the reaction with He as the bath gas.
C1 [Georgievskii, Yuri; Miller, James A.] Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA.
[Selllevag, Stig R.] SINTEF Energy Res, N-7465 Trondheim, Norway.
RP Selllevag, SR (reprint author), Univ Oslo, Ctr Mat Sci & Nanotechnol, POB 1126 Blindern, N-0318 Oslo, Norway.
EM s.r.sellevag@kjemi.uio.no; jamille@sandia.gov
FU Research Council of Norway [173826/130]
FX This work was supported by the Research Council of Norway under Contract
No. 173826/130. The Norwegian Metacenter for Computational Science
(Notur) is acknowledged for grants of computing time. Sandia is a
multiprogram laboratory operated by Sandia Corporation, a Lockheed
Martin Company, for the United States Department of Energy's National
Nuclear Security Administration under Contract No. DE-AC04-94-AL85000.
The authors are grateful to Dr. Stephen J. Klippenstein and Dr. Ahren W.
Jasper for helpful discussions. Professors Jorgen Troe and V. G. Ushakov
are acknowledged for making their paper available prior to publication.
NR 70
TC 19
Z9 19
U1 2
U2 25
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD APR 23
PY 2009
VL 113
IS 16
BP 4457
EP 4467
DI 10.1021/jp8110524
PG 11
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 435ZU
UT WOS:000265383200094
PM 19371118
ER
PT J
AU Mielke, SL
Schwenke, DW
Schatz, GC
Garrett, BC
Peterson, KA
AF Mielke, Steven L.
Schwenke, David W.
Schatz, George C.
Garrett, Bruce C.
Peterson, Kirk A.
TI Functional Representation for the Born-Oppenheimer Diagonal Correction
and Born-Huang Adiabatic Potential Energy Surfaces for Isotopomers of
H-3
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID TRANSITION-STATE THEORY; MECHANICAL REACTIVE SCATTERING; ATOM
TRANSFER-REACTIONS; WAVE-FUNCTIONS; VARIATIONAL METHOD; HYDROGEN
MOLECULE; H+H-2 REACTION; BASIS-SETS; APPROXIMATION; DYNAMICS
AB Multireference configuration interaction (MRCI) calculations of the Born-Oppenheimer diagonal correction (BODC) for H-3 were performed at 1397 symmetry-unique configurations using the Handy-Yamaguchi-Schaefer approach; isotopic substitution leads to 4041 symmetry-unique configurations for the DH2 mass combination. These results were then fit to a functional form that permits calculation of the BODC for any combination of isotopes. Mean unsigned fitting errors on a test grid of configurations not included in the fitting process were 0.14, 0.12, and 0.65 cm(-1) for the H-3, DH2, and MuH(2) isotopomers, respectively. This representation can be combined with any Born-Oppenheimer potential energy surface (PES) to yield Born-Huang (BH) PESs; herein, we choose the CCI potential energy surface, the uncertainties of which (similar to 0.01 kcal/mol) are much smaller than the magnitude of the BODC. Fortran routines to evaluate these BH surfaces are provided. Variational transition state theory calculations are presented comparing thermal rate constants for reactions on the BO and BH surfaces to provide an initial estimate of the significance of the diagonal correction for the dynamics.
C1 [Mielke, Steven L.; Schatz, George C.] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
[Schwenke, David W.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
[Garrett, Bruce C.] Pacific NW Natl Lab, Chem & Mat Sci Div, Richland, WA 99352 USA.
[Peterson, Kirk A.] Washington State Univ, Dept Chem, Pullman, WA 99164 USA.
RP Mielke, SL (reprint author), Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
EM slmielke@gmail.com
RI Garrett, Bruce/F-8516-2011; Mielke, Steven/B-7533-2008; schwenke,
david/I-3564-2013
OI Mielke, Steven/0000-0002-1938-7503;
NR 64
TC 25
Z9 25
U1 1
U2 13
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD APR 23
PY 2009
VL 113
IS 16
BP 4479
EP 4488
DI 10.1021/jp8110887
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 435ZU
UT WOS:000265383200096
PM 19290604
ER
PT J
AU Kilin, DS
Tsemekhman, KL
Kilina, SV
Balatsky, AV
Prezhdo, OV
AF Kilin, Dmitri S.
Tsemekhman, Kiril L.
Kilina, Svetlana V.
Balatsky, Alexander V.
Prezhdo, Oleg V.
TI Photoinduced Conductivity of a Porphyrin-Gold Composite Nanowire
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID DENSITY-FUNCTIONAL THEORY; SCANNING-TUNNELING-MICROSCOPY; PBSE
QUANTUM-DOT; AB-INITIO; ELECTRONIC EXCITATIONS; SEMICONDUCTOR CLUSTERS;
DNA-MOLECULES; NANOPARTICLES; CONDUCTANCE; SURFACE
AB Negatively charged phosphine groups on the backbone of DNA are known to attract gold nanoclusters from a colloid, assembling the clusters at fixed intervals. Bridging these intervals with porphyrin-dye linkers forms an infinite conducting chain, a quantum wire whose carrier mobility can be enhanced by photoexcitation. The resulting nanoassembly can be used as a gate: a wire with a controllable conductivity. The electronic structure of the porphyrin-gold wire is studied here by density functional theory, and the conductivity of the system is determined as a function of the photoexcitation energy. Photoexcitations of the dye are found to enhance the wire conductivity by orders of magnitude.
C1 [Prezhdo, Oleg V.] Univ Washington, Dept Chem, Seattle, WA 98195 USA.
[Kilin, Dmitri S.] Univ Florida, Dept Chem, Quantum Theory Project, Gainesville, FL 32611 USA.
[Kilin, Dmitri S.] Univ Florida, Dept Phys, Quantum Theory Project, Gainesville, FL 32611 USA.
[Kilina, Svetlana V.; Balatsky, Alexander V.] Los Alamos Natl Lab, CINT, Los Alamos, NM 87545 USA.
[Kilina, Svetlana V.; Balatsky, Alexander V.] Los Alamos Natl Lab, T Div, Los Alamos, NM 87545 USA.
RP Prezhdo, OV (reprint author), Univ Washington, Dept Chem, Seattle, WA 98195 USA.
EM prezhdo@u.washington.edu
RI Kilin, Dmitri/C-7545-2009
FU NSF [CHE-0701517, DOE DE-FG02-05ER15755, ACS-PRF 46772-AC6]; DOE
FX The funding was provided by grants from NSF CHE-0701517, DOE
DE-FG02-05ER15755 and ACS-PRF 46772-AC6 to O.V.P. Work at Los Alamos was
supported by DOE.
NR 84
TC 28
Z9 28
U1 1
U2 11
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD APR 23
PY 2009
VL 113
IS 16
BP 4549
EP 4556
DI 10.1021/jp811169c
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 435ZU
UT WOS:000265383200102
PM 19278216
ER
PT J
AU Garand, E
Buchachenko, AA
Yacovitch, TI
Szczesniak, MM
Chalasinski, G
Neumark, DM
AF Garand, Etienne
Buchachenko, Alexei A.
Yacovitch, Tara I.
Szczesniak, Malgorzata M.
Chalasinski, Grzegorz
Neumark, Daniel M.
TI Study of ArO- and ArO via Slow Photoelectron Velocity-Map Imaging
Spectroscopy and Ab Initio Calculations
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID RARE-GAS OXIDES; KINETIC-ENERGY SPECTROSCOPY; QUANTUM-MECHANICAL
TREATMENT; LYING ELECTRONIC STATES; LOWEST EXCITED-STATES;
NEGATIVE-IONS; PHOTODETACHMENT SPECTROSCOPY; WEAK-INTERACTIONS; ATOM
COLLISIONS; CROSS-SECTIONS
AB The high-resolution photoelectron spectrum of ArO- was obtained using slow electron velocity-map imaging (SEVI). The SEVI spectrum reveals well-resolved vibrational transitions between multiple electronic states of ArO- and ArO, both of which are open-shell species. These transitions occur within the broad envelope of previous lower resolution photoelectron spectra. Detailed assignments are made by comparison with theoretical simulations based on high level ab initio calculations and an atoms-in-molecule model that accounts for spin-orbit coupling in the anion and neutral. The adiabatic electron affinity of ArO is found to be 12481 +/- 2 cm(-1). Several ArO- and ArO vibrational frequencies and excited-state term energies are accurately determined from the analysis of the experimental spectra and are found to be in excellent agreement with the calculated values.
C1 [Buchachenko, Alexei A.] Moscow MV Lomonosov State Univ, Dept Chem, Lab Mol Struct & Quantum Mech, Moscow 119991, Russia.
[Garand, Etienne; Yacovitch, Tara I.; Neumark, Daniel M.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Szczesniak, Malgorzata M.; Chalasinski, Grzegorz] Oakland Univ, Dept Chem, Rochester, MI 48309 USA.
[Chalasinski, Grzegorz] Univ Warsaw, Fac Chem, PL-02093 Warsaw, Poland.
[Neumark, Daniel M.] Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Buchachenko, AA (reprint author), Moscow MV Lomonosov State Univ, Dept Chem, Lab Mol Struct & Quantum Mech, Moscow 119991, Russia.
EM alexei@classic.chem.msu.su
RI Neumark, Daniel/B-9551-2009; Buchachenko, Alexei/C-8452-2012;
OI Neumark, Daniel/0000-0002-3762-9473; Buchachenko,
Alexei/0000-0003-0701-5531; Garand, Etienne/0000-0001-5062-5453
FU Air Force Office of Scientific Research [F4962003-1-0085]; National
Science Foundation [CHE-0719260]; Russian Basic Research Fund
[08-03-00414]; National Science and Engineering Research Council of
Canada (NSERC); Fonds Quebecois de la Recherche sur la Nature et les
Technologies (FQRNT)
FX We thank Dr. Andrey Stolyarov for useful comments concerning the
normalization of the bound-free spectra. This work was supported by the
Air Force Office of Scientific Research under Grant No. F4962003-1-0085
(D.M.N.), the National Science Foundation under Grant No. CHE-0719260
(M.M.S. and G.C.), and the Russian Basic Research Fund under Project No.
08-03-00414 (A.A.B.). E.G. thanks the National Science and Engineering
Research Council of Canada (NSERC) for a post graduate scholarship, and
T.I.Y. thanks. the Fonds Quebecois de la Recherche sur la Nature et les
Technologies (FQRNT) for a master's scholarship.
NR 41
TC 5
Z9 5
U1 1
U2 13
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD APR 23
PY 2009
VL 113
IS 16
BP 4631
EP 4638
DI 10.1021/jp8113682
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 435ZU
UT WOS:000265383200111
PM 19371122
ER
PT J
AU Juan, ML
Plain, J
Bachelot, R
Vial, A
Royer, P
Gray, SK
Montgomery, JM
Wiederrecht, GP
AF Juan, Mathieu L.
Plain, Jerome
Bachelot, Renaud
Vial, Alexandre
Royer, Pascal
Gray, Stephen K.
Montgomery, Jason M.
Wiederrecht, Gary P.
TI Plasmonic Electromagnetic Hot Spots Temporally Addressed by Photoinduced
Molecular Displacement
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID ENHANCED RAMAN-SCATTERING; POLYMER-FILMS; RESONANCE SPECTROSCOPY;
SURFACE; NANOPARTICLES; SENSITIVITY; GRATINGS; MOTIONS; SERS
AB We report the observation of temporally varying electromagnetic hot spots in plasmonic nanostructures. Changes in the field amplitude, position, and spatial features are induced by embedding plasmonic silver nanorods in the photoresponsive azo-polymer. This polymer undergoes cis-trans isomerization and wormlike transport within resonant optical fields, producing a time-varying local dielectric environment that alters the locations where electromagnetic hot spots are produced. Finite-difference time-domain and Monte Carlo simulations that model the induced field and corresponding material response are presented to aid in the interpretation of the experimental results. Evidence for propagating plasmons induced at the ends of the rods is also presented.
C1 [Juan, Mathieu L.; Plain, Jerome; Bachelot, Renaud; Vial, Alexandre; Royer, Pascal] Univ Technol Troyes, CNRS, ICD, Lab Nanotechnol & Instrumentat Opt,FRE 2848, Troyes, France.
[Wiederrecht, Gary P.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
[Gray, Stephen K.; Montgomery, Jason M.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Plain, J (reprint author), Univ Technol Troyes, CNRS, ICD, Lab Nanotechnol & Instrumentat Opt,FRE 2848, BP 2060, Troyes, France.
EM jerome.plain@utt.fr
RI Plain, Jerome/A-2888-2009; Juan, Mathieu/C-6331-2008; Vial,
Alexandre/I-7894-2012; Bachelot, Renaud/M-6888-2015
OI Juan, Mathieu/0000-0002-2740-8001; Vial, Alexandre/0000-0002-7701-0413;
FU European Social Fund; Conseil General de I'Aube (distric grant); ANR
(2007 Photohybrid); Region Champagne-Ardennes [E2007-08052]; U.S.
Department of Energy [DE-AC02-06CH11357]
FX One of the authors' Ph.D. research (M.J.) is supported by the European
Social Fund and the Conseil General de I'Aube (distric grant). This work
was financially supported by the ANR (2007 Photohybrid) and the Region
Champagne-Ardennes (Project E2007-08052). Use of the Center for
Nanoscale Materials and work at Argonne National Laboratory were
supported by the U.S. Department of Energy, Office of Science, Office of
Basic Energy Science, under Contract No. DE-AC02-06CH11357.
NR 23
TC 18
Z9 18
U1 0
U2 12
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD APR 23
PY 2009
VL 113
IS 16
BP 4647
EP 4651
DI 10.1021/jp8114435
PG 5
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 435ZU
UT WOS:000265383200113
PM 19296647
ER
PT J
AU Dawes, R
Wagner, AF
Thompson, DL
AF Dawes, Richard
Wagner, Albert F.
Thompson, Donald L.
TI Ab Initio Wavenumber Accurate Spectroscopy: (CH2)-C-1 and HCN
Vibrational Levels on Automatically Generated IMLS Potential Energy
Surfaces
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID CONFIGURATION-INTERACTION CALCULATIONS; DISCRETE-VARIABLE
REPRESENTATIONS; FOURIER-TRANSFORM SPECTRA; OPTICAL DOUBLE-RESONANCE;
NEURAL-NETWORKS; SINGLET METHYLENE; ABSORPTION-SPECTROSCOPY; 1S
CORRELATION; CH2; STATE
AB We report here calculated J = 0 vibrational frequencies for (CH2)-C-1 and HCN with root-mean-square error relative to available measurements of 2.0 cm(-1) and 3.2 cm(-1), respectively. These results are obtained with DVR calculations with a dense grid on ab initio potential energy surfaces (PESs). The ab initio electronic structure calculations employed are Davidson-corrected MRCI calculations with double-, triple-, and quadruple-zeta basis sets extrapolated to the complete basis set (CBS) limit. In the (CH2)-C-1 case, Full Cl tests of the Davidson correction at small basis set levels lead to a scaling of the correction with the bend angle that can be profitably applied at the CBS limit. Core-valence corrections are added derived from CCSD(T) calculations with and without frozen cores. Relativistic and non-Born-Oppenheimer corrections are available for HCN and were applied. CBS limit CCSD(T) and CASPT2 calculations with the same basis sets were also tried for HCN. The CCSD(T) results are noticeably less accurate than the MRCI results while the CASPT2 results are much poorer. The PESs were generated automatically using the local interpolative moving least-squares method (L-IMLS). A general triatomic code is described where the L-IMLS method is interfaced with several common electronic structure packages. All PESs were computed with this code running in parallel on eight processors. The L-IMLS method provides global and local fitting error measures important in automatically growing the PES from initial ab initio seed points. The reliability of this approach was tested for (CH2)-C-1 by comparing DVR-calculated vibrational levels on an L-IMLS ab initio surface with levels generated by an explicit ab initio calculation at each DVR grid point. For all levels (similar to 200) below 20 000 cm(-1), the mean unsigned difference between the levels of these two calculations was 0.1 cm(-1), consistent with the L-IMLS estimated mean unsigned fitting error of 0.3 cm(-1). All L-IMLS PESs used in this work have comparable mean unsigned fitting errors, implying that fitting errors have a negligible role in the final errors of the computed vibrational levels with experiment. Less than 500 ab initio calculations of the energy and gradients are required to achieve this level of accuracy.
C1 [Dawes, Richard; Thompson, Donald L.] Univ Missouri, Dept Chem, Columbia, MO 65211 USA.
[Wagner, Albert F.] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
RP Thompson, DL (reprint author), Univ Missouri, Dept Chem, Columbia, MO 65211 USA.
EM thompsondon@missouri.edu
RI Dawes, Richard/C-6344-2015
FU U.S. Department of Energy [W-31-109-Eng-38, DE-FG02-01ER15231]
FX We acknowledge very helpful discussions with Kirk Peterson (Washington
State University) that clarified the limitations of different electronic
structure methods. We acknowledge helpful discussions with Lawrence
Harding and Michael Minkoff (Argonne National Laboratory) in the course
of this work. This work was supported by the U.S. Department of Energy,
Office of Basic Energy Sciences, Division of Chemical Sciences, Office
of Science, U.S. Department of Energy under Contract No. W-31-109-Eng-38
(Argonne) and Contract No. DE-FG02-01ER15231 (UM).
NR 86
TC 37
Z9 37
U1 1
U2 31
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD APR 23
PY 2009
VL 113
IS 16
BP 4709
EP 4721
DI 10.1021/jp900409r
PG 13
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 435ZU
UT WOS:000265383200121
PM 19371124
ER
PT J
AU Arantes, JT
Lima, MP
Fazzio, A
Xiang, H
Wei, SH
Dalpian, GM
AF Arantes, J. T.
Lima, M. P.
Fazzio, A.
Xiang, H.
Wei, Su-Huai
Dalpian, G. M.
TI Effects of Side-Chain and Electron Exchange Correlation on the Band
Structure of Perylene Diimide Liquid Crystals: A Density Functional
Study
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID THIN-FILM TRANSISTORS; CHANNEL ORGANIC SEMICONDUCTORS; FIELD-EFFECT
TRANSISTOR; CHARGE-TRANSPORT; OPTOELECTRONIC PROPERTIES; TOTAL-ENERGY;
DERIVATIVES; MOLECULES; GATE; PSEUDOPOTENTIALS
AB The structural and electronic properties of perylene diimide liquid crystal PPEEB are studied using ab initio methods based on the density functional theory (I)FT). Using available experimental crystallographic data as a guide, we propose a detailed structural model for the packing of solid PPEEB. We find that due to the localized nature of the band edge wave function, theoretical approaches beyond the standard method, such as hybrid functional (PBE0), are required to correctly characterize the band structure of this material. Moreover, unlike previous assumptions, we observe the formation of hydrogen bonds between the side chains of different molecules, which leads to a dispersion of the energy levels. This result indicates that the side chains of the molecular crystal not only are responsible for its structural conformation but also can be used for tuning the electronic and optical properties of these materials.
C1 [Arantes, J. T.; Fazzio, A.; Dalpian, G. M.] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Santo Andre, SP, Brazil.
[Arantes, J. T.; Fazzio, A.; Dalpian, G. M.] Univ Sao Paulo, Santo Andre, SP, Brazil.
[Lima, M. P.] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil.
[Xiang, H.; Wei, Su-Huai] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Dalpian, GM (reprint author), Univ Fed ABC, Ctr Ciencias Nat & Humanas, Santo Andre, SP, Brazil.
EM gustavo.dalpian@ufabc.edu.br
RI Xiang, Hongjun/A-4076-2008; Arantes, Jeverson Teodoro/C-3372-2012;
Dalpian, Gustavo/B-9746-2008; Xiang, Hongjun/I-4305-2016;
OI Arantes, Jeverson Teodoro/0000-0003-0954-5632; Dalpian,
Gustavo/0000-0001-5561-354X; Xiang, Hongjun/0000-0002-9396-3214; Lima,
Matheus/0000-0001-5389-7649
FU FAPESP; CNPq; U.S. Department of Energy, Office of Science, Basic Energy
Sciences [DE-AC36-08GO28308]
FX G.M.D. and S.H.W. thank Pierre Carrier and Brian Gregg for fruitful
discussions in the initial stages of this project. We thank G. Kresse
for providing us the VASP 5.1 code. The work in Brazil was partially
funded by the Brazilian agencies FAPESP and CNPq. In the U.S., this work
was funded by the U.S. Department of Energy, Office of Science, Basic
Energy Sciences, under Contract No. DE-AC36-08GO28308 to NREL.
NR 53
TC 8
Z9 8
U1 2
U2 16
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD APR 23
PY 2009
VL 113
IS 16
BP 5376
EP 5380
DI 10.1021/jp8101018
PG 5
WC Chemistry, Physical
SC Chemistry
GA 434IT
UT WOS:000265269100006
PM 19368408
ER
PT J
AU Shkrob, IA
Wishart, JF
AF Shkrob, Ilya A.
Wishart, James F.
TI Charge Trapping in Imidazolium Ionic Liquids
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Review
ID SENSITIZED SOLAR-CELLS; SUPERCRITICAL CARBON-DIOXIDE; DENSITY-FUNCTIONAL
THEORY; PULSE-RADIOLYSIS; SOLVATED ELECTRON; METHYLTRIBUTYLAMMONIUM
BIS(TRIFLUOROMETHYLSULFONYL)IMIDE; REACTION-KINETICS; HYDRATED ELECTRON;
RESONANCE RAMAN; RELAXATION DYNAMICS
AB Room-temperature ionic liquids (ILs) are a promising class of solvents for applications ranging from photovoltaics to solvent extractions. Some of these applications involve the exposure of the ILs to ionizing radiation, which stimulates interest in their radiation and photo- chemistry. In the case of ILs consisting of 1,3-dialkylimidazolium cations and hydrophobic anions, ionization, charge transfer and redox reactions yield charge-trapped species thought to be radicals resulting from neutralization of the constituent ions. Using computational chemistry methods and the recent results on electron spin resonance (ESR) and transient absorption spectroscopy of the ionized ILs, we argue that electron localization in the imidazolium ILs yields a gauche dimer radical cation with the elongated C(2)-C(2) bond. This species is shown to absorb in the near-infrared and the visible regions and accounts for the observed ESR spectra. We suggest that the excess electron in these aromatic ILs is localized as such a dimeric ion, and consider the chemical implications of this attribution. We also suggest that three-electron N-N bonding with the formation of a dimer radical anion occurs for amide anions, such as dicyanamide, when the parent anion traps holes; steric hindrance prevents the analogous reaction for bis(triflyl)amide anion. For another anion of practical importance, bis(oxalato)borate, a pathway involving the elimination of CO2 is suggested. Together, these results indicate the unanticipated tendency of the ILs to localize primary charges as radical ions as opposed to neutral radicals. Thus, it appears that secondary chemistry in the ionized ILs may be dominated by radical ion reactions, similarly to the previously. studied conventional organic liquids, depending on the composition of the IL.
C1 [Shkrob, Ilya A.] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
[Wishart, James F.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
RP Shkrob, IA (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM shkrob@anl.gov; wishart@bnl.gov
RI Wishart, James/L-6303-2013
OI Wishart, James/0000-0002-0488-7636
FU US-DOE [DE-AC-02-06CH11357, DE-AC-02-98CH10886]
FX The authors thank S. E. Bradforth, P. Pieniazek, A.-N. Unterreiner, J.
R. Miller, D. M. Bartels, R. A. Crowell, M. L. Dietz, K. Takahashi, and
R. Katoh for many useful discussions and communication of their
unpublished results, and T. Szreder and A. M. Funston, for assistance
with the pulse radiolysis experiments at LEAF. The work at Argonne was
supported by the Office of Science, Division of Chemical Sciences,
US-DOE, under contract No. DE-AC-02-06CH11357. The work at Brookhaven is
supported by the Office of Science, Division of Chemical Sciences,
US-DOE, under contract DEAC02-98CH10886.
NR 107
TC 55
Z9 56
U1 7
U2 70
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD APR 23
PY 2009
VL 113
IS 16
BP 5582
EP 5592
DI 10.1021/jp811495e
PG 11
WC Chemistry, Physical
SC Chemistry
GA 434IT
UT WOS:000265269100030
PM 19323543
ER
PT J
AU Wang, LQ
Karkamkar, A
Autrey, T
Exarhos, GJ
AF Wang, Li-Qiong
Karkamkar, Abhi
Autrey, Tom
Exarhos, Gregory J.
TI Hyperpolarized Xe-129 NMR Investigation of Ammonia Borane in Mesoporous
Silica
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID NUCLEAR-MAGNETIC-RESONANCE; HYDROGEN STORAGE PROPERTIES;
THERMAL-DECOMPOSITION; CHEMICAL-SHIFT; SIZE; KINETICS; RELEASE; MAS
AB Hyperpolarized (HP) Xe-129 NMR was used to probe the porosity of mesoporous silica (MCM) infused with ammonia borane (AB). Variable-temperature HP Xe-129 NMR measurements have been systematically carried out on a series of MCM-41 materials with AB loading ranging from 33 to 75 wt % (1:2 to 3:1 AB:MCM). Three distinct types of pore environments are clearly evident: pristine mesopores, pores coated with AB inside the meso-channels, and interparticle spacing formed from AB aggregates outside the meso-channels. We found similarly uniform coating of AB on mesoporous silica channels with 1:2 and 1: 1 AB:MCM loading (ratio of weight percent). When the loading of AB to MCM is greater than 1: 1, AB starts to aggregate outside the meso-channels. Further increases in loading (>= 3: 1) result in the formation of partially blocked meso-channels as a result of excessive AB. The detailed information obtained from this study on how supported AB resides in nanoporous channels and how it evolves with the increase of AB loading is helpful for the rational design of novel materials with optimal hydrogen storage and release properties.
C1 [Wang, Li-Qiong; Karkamkar, Abhi; Autrey, Tom; Exarhos, Gregory J.] Pacific NW Natl Lab, Fundamental & Computat Sci Directorate, Richland, WA 99354 USA.
RP Wang, LQ (reprint author), Pacific NW Natl Lab, Fundamental & Computat Sci Directorate, Richland, WA 99354 USA.
EM lq.wang@pnl.gov
FU Materials Sciences and Engineering Division; Office of Basic Energy
Sciences; U.S. Department of Energy (US DOE) [DE-AC06-76RL0 1830];
Chemical Science Division
FX The HP 129Xe NMR work was supported by the Materials Sciences
and Engineering Division, Office of Basic Energy Sciences, U.S.
Department of Energy (US DOE). The synthesis effort was supported by the
Chemical Science Division, Office of Basic Energy Sciences, U.S.
Department of Energy (US DOE). Pacific Northwest National Laboratory
(PNNL) is a multi-program national laboratory operated for the USDOE by
Battelle Memorial Institute under Contract DE-AC06-76RL0 1830.
NR 31
TC 23
Z9 23
U1 1
U2 11
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD APR 23
PY 2009
VL 113
IS 16
BP 6485
EP 6490
DI 10.1021/jp810994p
PG 6
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 435ZV
UT WOS:000265383300021
ER
PT J
AU Wang, LQ
Wang, DH
Liu, J
Exarhos, GJ
Pawsey, S
Moudrakovski, I
AF Wang, Li-Qiong
Wang, Donghai
Liu, Jun
Exarhos, Gregory J.
Pawsey, Shane
Moudrakovski, Igor
TI Probing Porosity and Pore Interconnectivity in Crystalline Mesoporous
TiO2 Using Hyperpolarized Xe-129 NMR
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID RUTILE TIO2; IONIC LIQUID; XENON; TITANIA; EXCHANGE; SPECTROSCOPY;
ADSORPTION; CATALYSTS; ZEOLITES; DYNAMICS
AB Hyperpolarized (HP) Xe-129 NMR was used to probe the porosity and interconnectivity of pores in crystalline mesoporous TiO2. We have demonstrated that HP Xe-129 NMR can be used to differentiate between similar sized pores within different crystalline phases. Pores of 4 nm size resident in mixed anatase and rutile mesoporous TiO2 phases were identified. Complementary to other pore characterization techniques, HP Xe-129 NMR is able to probe the interconnectivity between pores present in these different phases. The cross peaks in 2D exchange (EXSY) NMR spectra between the signals of xenon in two types of pores are visible on millisecond timescale, indicating substantial pore interconnectivity. The obtained information on porosity and interconnectivity is important for the understanding of ion transport mechanisms in mesoporous TiO2 anode materials.
C1 [Wang, Li-Qiong; Wang, Donghai; Liu, Jun; Exarhos, Gregory J.] Pacific NW Natl Lab, Fundamental Sci Div, Richland, WA 99354 USA.
[Pawsey, Shane; Moudrakovski, Igor] Natl Res Council Canada, Steacie Inst Mol Sci, Ottawa, ON K1A 0R6, Canada.
RP Wang, LQ (reprint author), Pacific NW Natl Lab, Fundamental Sci Div, Richland, WA 99354 USA.
EM lq.wang@pnl.gov
RI Wang, Donghai/L-1150-2013
OI Wang, Donghai/0000-0001-7261-8510
FU U.S. Department of Energy (US DOE) [DE-AC06-76RL0 1830]; Department of
Energy's Office of Biological and Environmental Research
FX HP 129Xe NMR work was supported by Materials Sciences and
Engineering Division, Office of Basic Energy Sciences, U.S. Department
of Energy (US DOE). The synthesis effort was conducted under the
Laboratory Directed Research and Development Program (LDRD) at Pacific
Northwest National Laboratory (PNNL). TEM investigation was performed in
the EMSL, a national scientific user facility sponsored by the
Department of Energy's Office of Biological and Environmental Research
and located at Pacific Northwest National Laboratory. PNNL is a
multiprogram national laboratory operated for the USDOE by Battelle
Memorial Institute under Contract DE-AC06-76RL0 1830.
NR 40
TC 8
Z9 8
U1 1
U2 7
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD APR 23
PY 2009
VL 113
IS 16
BP 6577
EP 6583
DI 10.1021/jp809740e
PG 7
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 435ZV
UT WOS:000265383300035
ER
PT J
AU Johnson, JC
Reilly, TH
Kanarr, AC
van de Lagemaat, J
AF Johnson, Justin C.
Reilly, Thomas H., III
Kanarr, Allison C.
van de Lagemaat, Jao
TI The Ultrafast Photophysics of Pentacene Coupled to Surface Plasmon
Active Nanohole Films
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID MULTIPLE EXCITON GENERATION; TETRACENE CRYSTALS; TRIPLET EXCITONS;
QUANTUM DOTS; SOLAR-CELLS; THIN-FILMS; FLUORESCENCE; SPECTROSCOPY;
NANOPARTICLES; ENHANCEMENT
AB Pentacene, a model organic semiconductor, is shown to couple with surface plasmon (SP) active silver nanohole films to produce enhanced excited-state absorption. In addition, the dynamics of triplet formation and decay on a subpicosecond time scale are altered due to the coupling of the excited state with the resonant SP, possibly involving the interplay between singlet fission and triplet-triplet annihilation. Shifting the resonance of the SP with respect to the pentacene excitations and introducing a dielectric spacer between pentacene and metal lead to changes in the spectra and dynamics that can be explained qualitatively. These results are compared with recent literature reports of molecule/plasmon hybridization and are placed in context with efforts to utilize SPs for enhanced solar energy conversion.
C1 [Kanarr, Allison C.] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA.
[Johnson, Justin C.; Reilly, Thomas H., III; van de Lagemaat, Jao] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Johnson, JC (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM Justin_Johnson@nrel.gov
RI van de Lagemaat, Jao/J-9431-2012
FU U.S. Department-of Energy [DE-AC36-08GO28308]; National Renewable Energy
Laboratory
FX We thank David Jonas for insightful comments. T.R., J.L., A.K., and
J.C.J. are supported by a grant from the Laboratory Directed Research
and Development program at NREL. J.C.J. also acknowledges support from
the Hydrogen Fuel Initiative of the Department of Energy, Office of
Science, Basic Energy Sciences. J.L. acknowledges the Photochemistry and
Radiation Research Program of the U.S. Department of Energy, Office of
Science, Basic Energy Sciences, Division of Chemical Sciences,
Geosciences and Biosciences. This work was supported by the U.S.
Department-of Energy under Contract No. DE-AC36-08GO28308 with the
National Renewable Energy Laboratory.
NR 42
TC 23
Z9 23
U1 2
U2 24
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD APR 23
PY 2009
VL 113
IS 16
BP 6871
EP 6877
DI 10.1021/jp901419s
PG 7
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 435ZV
UT WOS:000265383300073
ER
PT J
AU Lee, S
Noh, JH
Han, HS
Yim, DK
Kim, DH
Lee, JK
Kim, JY
Jung, HS
Hong, KS
AF Lee, Sangwook
Noh, Jun Hong
Han, Hyun Soo
Yim, Dong Kyun
Kim, Dong Hoe
Lee, Jung-Kun
Kim, Jin Young
Jung, Hyun Suk
Hong, Kug Sun
TI Nb-Doped TiO2: A New Compact Layer Material for TiO2 Dye-Sensitized
Solar Cells
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID TRANSPARENT CONDUCTING OXIDE; ELECTRICAL-IMPEDANCE; ELECTRODE;
PERFORMANCE; EFFICIENCY; CONVERSION; FILMS; NANOPARTICLES; SUBSTRATE;
TRANSPORT
AB A Nb-doped TiO2 (NTO) thin film was deposited on a fluorine-doped tin oxide (FTO) electrode by pulsed laser deposition (PLD) and its application as a new compact layer material for dye-sensitized solar cells (DSSCs) was investigated.. On the basis of the investigation of the dark current, open circuit voltage (V-oc) decay, current-voltage (I-V) characteristics, and electrochemical impedance spectra (EIS), it was found that the NTO layer functioned as both a blocking layer and an ancillary transparent conducting oxide (TCO) layer. As a blocking layer, the NTO layer suppressed the charge recombination from TCO to the electrolyte. In addition, as an ancillary TCO layer, the NTO layer reduced the interfacial resistance between the TiO2 layer and TCO by forming an ohmic contact. As a result, the overall energy conversion efficiency of the DSSC incorporating the NTO layer was enhanced by 21.2% compared to that with the bare FTO substrate and 4.1 % compared to that with the undoped TiO2 layer, owing to the enhanced charge transfer and collection characteristics of the NTO layer. Our results demonstrated that NTO is a promising alternative to the conventional TiO2 compact layer in highly efficient DSSCs.
C1 [Kim, Jin Young] Natl Renewable Energy Lab, Chem & Biosci Ctr, Golden, CO 80401 USA.
[Lee, Jung-Kun] Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15260 USA.
[Jung, Hyun Suk] Kookmin Univ, Sch Adv Mat Engn, Seoul 136702, South Korea.
[Lee, Sangwook; Noh, Jun Hong; Han, Hyun Soo; Yim, Dong Kyun; Kim, Dong Hoe; Hong, Kug Sun] Seoul Natl Univ, Sch Mat Sci & Engn, Seoul 151744, South Korea.
RP Kim, JY (reprint author), Natl Renewable Energy Lab, Chem & Biosci Ctr, Golden, CO 80401 USA.
EM jinyoung_kim@nrel.gov; hjung@kookmin.ac.kr; kshongss@plaza.snu.ac.kr
RI Jung, Hyun Suk/D-4745-2011; Kim, Jin Young/B-7077-2012; Lee,
Sangwook/O-9166-2015; Jung, Hyun Suk/H-3659-2015
OI Kim, Jin Young/0000-0001-7728-3182; Lee, Sangwook/0000-0002-3535-0241;
FU U.S. Department of Energy [DE-AC36-08GO28308]; Korea government (MOST)
[R01-2007-000-11075-0, KRF-2007-313-D00345, R01-2008-000-20581-0]; Seoul
RBD Program [CR070027C092852]; Kookmin University
FX This research was funded by the U.S. Department of Energy under contract
no. DE-AC36-08GO28308 with the National Renewable Energy Laboratory
(J.Y.K.) and supported by the Korea Science and Engineering Foundation
(KOSEF) grant funded by the Korea government (MOST)
(R01-2007-000-11075-0) (RIAM). The work at Kookmin University was
supported by the Korea Research Foundation Grant funded by the Korean
Government (MOEHRD) (KRF-2007-313-D00345 & R01-2008-000-20581-0) and the
Seoul R&BD Program (CR070027C092852). This work was also supported by
the research program 2009 of Kookmin University.
NR 27
TC 140
Z9 142
U1 8
U2 145
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD APR 23
PY 2009
VL 113
IS 16
BP 6878
EP 6882
DI 10.1021/jp9002017
PG 5
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 435ZV
UT WOS:000265383300074
ER
PT J
AU Woyke, T
Xie, G
Copeland, A
Gonzalez, JM
Han, C
Kiss, H
Saw, JH
Senin, P
Yang, C
Chatterji, S
Cheng, JF
Eisen, JA
Sieracki, ME
Stepanauskas, R
AF Woyke, Tanja
Xie, Gary
Copeland, Alex
Gonzalez, Jose M.
Han, Cliff
Kiss, Hajnalka
Saw, Jimmy H.
Senin, Pavel
Yang, Chi
Chatterji, Sourav
Cheng, Jan-Fang
Eisen, Jonathan A.
Sieracki, Michael E.
Stepanauskas, Ramunas
TI Assembling the Marine Metagenome, One Cell at a Time
SO PLOS ONE
LA English
DT Article
AB The difficulty associated with the cultivation of most microorganisms and the complexity of natural microbial assemblages, such as marine plankton or human microbiome, hinder genome reconstruction of representative taxa using cultivation or metagenomic approaches. Here we used an alternative, single cell sequencing approach to obtain high-quality genome assemblies of two uncultured, numerically significant marine microorganisms. We employed fluorescence-activated cell sorting and multiple displacement amplification to obtain hundreds of micrograms of genomic DNA from individual, uncultured cells of two marine flavobacteria from the Gulf of Maine that were phylogenetically distant from existing cultured strains. Shotgun sequencing and genome finishing yielded 1.9 Mbp in 17 contigs and 1.5 Mbp in 21 contigs for the two flavobacteria, with estimated genome recoveries of about 91% and 78%, respectively. Only 0.24% of the assembling sequences were contaminants and were removed from further analysis using rigorous quality control. In contrast to all cultured strains of marine flavobacteria, the two single cell genomes were excellent Global Ocean Sampling (GOS) metagenome fragment recruiters, demonstrating their numerical significance in the ocean. The geographic distribution of GOS recruits along the Northwest Atlantic coast coincided with ocean surface currents. Metabolic reconstruction indicated diverse potential energy sources, including biopolymer degradation, proteorhodopsin photometabolism, and hydrogen oxidation. Compared to cultured relatives, the two uncultured flavobacteria have small genome sizes, few non-coding nucleotides, and few paralogous genes, suggesting adaptations to narrow ecological niches. These features may have contributed to the abundance of the two taxa in specific regions of the ocean, and may have hindered their cultivation. We demonstrate the power of single cell DNA sequencing to generate reference genomes of uncultured taxa from a complex microbial community of marine bacterioplankton. A combination of single cell genomics and metagenomics enabled us to analyze the genome content, metabolic adaptations, and biogeography of these taxa.
RP Woyke, T (reprint author), US DOE, Joint Genome Inst, Walnut Creek, CA USA.
EM rstepanauskas@bigelow.org
RI Saw, Jimmy/A-9972-2009; Gonzalez, Jose/C-3333-2013;
OI Saw, Jimmy/0000-0001-8353-3854; Gonzalez, Jose/0000-0002-9926-3323;
Senin, Pavel/0000-0001-5517-7768; Eisen, Jonathan
A./0000-0002-0159-2197; Stepanauskas, Ramunas/0000-0003-4458-3108
NR 55
TC 187
Z9 198
U1 5
U2 77
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD APR 23
PY 2009
VL 4
IS 4
AR e5299
DI 10.1371/journal.pone.0005299
PG 10
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 437VE
UT WOS:000265514200012
PM 19390573
ER
PT J
AU Shen, TY
Gnanakaran, S
AF Shen, Tongye
Gnanakaran, S.
TI The Stability of Cellulose: A Statistical Perspective from a
Coarse-Grained Model of Hydrogen-Bond Networks
SO BIOPHYSICAL JOURNAL
LA English
DT Article
ID NEUTRON FIBER DIFFRACTION; SYNCHROTRON X-RAY; 2-DIMENSIONAL CORRELATION
SPECTROSCOPY; TEMPERATURE-DEPENDENT CHANGES; I-BETA-CELLULOSE;
CRYSTAL-STRUCTURE; INFRARED-SPECTROSCOPY; MOLECULAR-DYNAMICS; SYSTEM
AB A critical roadblock to the production of biofuels from lignocellulosic biomass is the efficient degradation of crystalline microfibrils of cellulose to glucose. A microscopic understanding of how different physical conditions affect the overall stability of the crystalline structure of microfibrils could facilitate the design of more effective protocols for their degradation. One of the essential physical interactions that stabilizes microfibrils is a network of hydrogen (H) bonds: both intrachain H-bonds between neighboring monomers of a single cellulose polymer chain and interchain H-bonds between adjacent chains. We construct a statistical mechanical model of cellulose assembly at the resolution of explicit hydrogen-bond networks. Using the transfer matrix method, the partition function and the subsequent statistical properties are evaluated. With the help of this lattice-based model, we capture the plasticity of the H-bond network in cellulose due to frustration and redundancy in the placement of H-bonds. This plasticity is responsible for the stability of cellulose over a wide range of temperatures. Stable intrachain and interchain H-bonds are identified as a function of temperature that could possibly be manipulated toward rational destruction of crystalline cellulose.
C1 [Shen, Tongye; Gnanakaran, S.] Los Alamos Natl Lab, Theoret Biol & Biophys Grp, Los Alamos, NM 87545 USA.
[Shen, Tongye] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP Gnanakaran, S (reprint author), Los Alamos Natl Lab, Theoret Biol & Biophys Grp, Los Alamos, NM 87545 USA.
EM gnana@lanl.gov
RI Shen, Tongye/A-9718-2008;
OI Shen, Tongye/0000-0003-1495-3104; Gnanakaran, S/0000-0002-9368-3044
FU United States Department of Energy and Center for Nonlinear Studies
FX This work was supported in parts by an LANL-LDRD grant from the United
States Department of Energy and Center for Nonlinear Studies.
NR 32
TC 37
Z9 37
U1 2
U2 16
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 0006-3495
J9 BIOPHYS J
JI Biophys. J.
PD APR 22
PY 2009
VL 96
IS 8
BP 3032
EP 3040
DI 10.1016/j.bpj.2008.12.3953
PG 9
WC Biophysics
SC Biophysics
GA 450BX
UT WOS:000266377100007
PM 19383449
ER
PT J
AU Bai, F
Lo, CJ
Berry, RM
Xing, JH
AF Bai, Fan
Lo, Chien-Jung
Berry, Richard M.
Xing, Jianhua
TI Model Studies of the Dynamics of Bacterial Flagellar Motors
SO BIOPHYSICAL JOURNAL
LA English
DT Article
ID TORQUE-SPEED RELATIONSHIP; ESCHERICHIA-COLI; ROTARY MOTOR; GENERATING
UNITS; CRYSTAL-STRUCTURE; MOLECULAR MOTOR; DRIVEN; ROTOR; VIBRIO; FORCE
AB The bacterial flagellar motor is a rotary molecular machine that rotates the helical filaments that propel swimming bacteria. Extensive experimental and theoretical studies exist on the structure, assembly, energy input, power generation, and switching mechanism of the motor. In a previous article, we explained the general physics underneath the observed torque-speed curves with a simple two-state Fokker-Planck model. Here, we further analyze that model, showing that 1), the model predicts that the two components of the ion motive force can affect the motor dynamics differently, in agreement with latest experiments; 2), with explicit consideration of the stator spring, the model also explains the lack of dependence of the zero-load speed on stator number in the proton motor, as recently observed; and 3), the model reproduces the stepping behavior of the motor even with the existence of the stator springs and predicts the dwell-time distribution. The predicted stepping behavior of motors with two stators is discussed, and we suggest future experimental procedures for verification.
C1 [Xing, Jianhua] Univ Calif & Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, Livermore, CA USA.
[Bai, Fan; Lo, Chien-Jung; Berry, Richard M.] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England.
[Xing, Jianhua] Virginia Polytech Inst & State Univ, Dept Biol Sci, Blacksburg, VA 24061 USA.
RP Xing, JH (reprint author), Univ Calif & Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, Livermore, CA USA.
EM jxing@vt.edu
RI Xing, Jianhua/A-8101-2012
OI Xing, Jianhua/0000-0002-3700-8765
FU U.S. Department of Energy by the University of Caliform; Lawrence
Livennore National Laboratory [W-7405-Eng-48]; Wellcome Trust VIP
research
FX F.B. is supported by the Wellcome Trust VIP research funding. C.-J.L
thanks the Swire Group/ORS for financial suppon. J.X. was initially
supported by a Lawrence Livermore National Laboratory Directed Research
and Development grant. This work was partly performed Linder the
auspices of the U.S. Department of Energy by the University of
Califorma, Lawrence Livennore National Laboratory, under contract No.
W-7405-Eng-48.
NR 50
TC 16
Z9 17
U1 0
U2 8
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 0006-3495
J9 BIOPHYS J
JI Biophys. J.
PD APR 22
PY 2009
VL 96
IS 8
BP 3154
EP 3167
DI 10.1016/j.bpj.2009.01.023
PG 14
WC Biophysics
SC Biophysics
GA 450BX
UT WOS:000266377100018
PM 19383460
ER
PT J
AU Allen, JE
Gardner, SN
Vitalis, EA
Slezak, TR
AF Allen, Jonathan E.
Gardner, Shea N.
Vitalis, Elizabeth A.
Slezak, Tom R.
TI Conserved amino acid markers from past influenza pandemic strains
SO BMC MICROBIOLOGY
LA English
DT Article
ID A VIRUSES; H5N1 VIRUS; TRANSMISSION; THAILAND; GENOME; ASIA
AB Background: Finding the amino acid mutations that affect the severity of influenza infections remains an open and challenging problem. Of special interest is better understanding how current circulating influenza strains could evolve into a new pandemic strain. Influenza proteomes from distinct viral phenotype classes were searched for class specific amino acid mutations conserved in past pandemics, using reverse engineered linear classifiers.
Results: Thirty-four amino acid markers associated with host specificity and high mortality rate were found. Some markers had little impact on distinguishing the functional classes by themselves, however in combination with other mutations they improved class prediction. Pairwise combinations of influenza genomes were checked for reassortment and mutation events needed to acquire the pandemic conserved markers. Evolutionary pathways involving H1N1 human and swine strains mixed with avian strains show the potential to acquire the pandemic markers with a double reassortment and one or two amino acid mutations.
Conclusion: The small mutation combinations found at multiple protein positions associated with viral phenotype indicate that surveillance tools could monitor genetic variation beyond single point mutations to track influenza strains. Finding that certain strain combinations have the potential to acquire pandemic conserved markers through a limited number of reassortment and mutation events illustrates the potential for reassortment and mutation events to lead to new circulating influenza strains.
C1 [Allen, Jonathan E.; Gardner, Shea N.; Vitalis, Elizabeth A.; Slezak, Tom R.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Allen, JE (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM allen99@llnl.gov; gardner26@llnl.gov; vitalis1@llnl.gov;
slezak1@llnl.gov
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]
FX JEA was supported in part by an IC Postdoctoral fellowship. We thank
Stephen P. Velsko for valuable discussions. This work was performed
under the auspices of the U.S. Department of Energy by Lawrence
Livermore National Laboratory under Contract DE-AC52-07NA27344.
NR 30
TC 22
Z9 22
U1 0
U2 2
PU BIOMED CENTRAL LTD
PI LONDON
PA 236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND
SN 1471-2180
J9 BMC MICROBIOL
JI BMC Microbiol.
PD APR 22
PY 2009
VL 9
AR 77
DI 10.1186/1471-2180-9-77
PG 10
WC Microbiology
SC Microbiology
GA 455XB
UT WOS:000266800800002
PM 19386124
ER
PT J
AU Lee, WS
Vishik, IM
Lu, DH
Shen, ZX
AF Lee, W. S.
Vishik, I. M.
Lu, D. H.
Shen, Z-X
TI A brief update of angle-resolved photoemission spectroscopy on a
correlated electron system
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article; Proceedings Paper
CT 25th International Conference on Low Temperature Physics (LT25)
CY AUG 06-13, 2008
CL Leiden Inst Phys, Kamerlingh Onnes Lab, Amsterdam, NETHERLANDS
HO Leiden Inst Phys, Kamerlingh Onnes Lab
ID HIGH-TEMPERATURE SUPERCONDUCTORS; ENERGY-GAP; TUNNELING SPECTROSCOPY;
UNDERDOPED BI2212; PSEUDOGAP; BI2SR2CACU2O8+DELTA; DEPENDENCE; STATE
AB In this paper, we briefly summarize the capabilities of state-of-the-art angle-resolved photoemission spectroscopy (ARPES) in the field of experimental condensed matter physics. Due to the advancement of the detector technology and the high flux light sources, ARPES has become a powerful tool to study the low energy excitations of solids, especially those novel quantum materials in which many-body physics are at play. To benchmark today's state-of-the-art ARPES technique, we demonstrate that the precision of today's ARPES has advanced to a regime comparable to the bulk-sensitive de Haas-van Alphen (dHvA) measurements. Finally, as an example of new discoveries driven by the advancement of the ARPES technique, we summarize some of our recent ARPES measurements on underdoped high-T-c superconducting cuprates, which have provided further insight into the complex pseudogap problem.
C1 [Lee, W. S.] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA.
RP Lee, WS (reprint author), Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
NR 26
TC 10
Z9 10
U1 0
U2 12
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
EI 1361-648X
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD APR 22
PY 2009
VL 21
IS 16
AR 164217
DI 10.1088/0953-8984/21/16/164217
PG 7
WC Physics, Condensed Matter
SC Physics
GA 426ZH
UT WOS:000264746900020
PM 21825397
ER
PT J
AU Okawa, D
Pastine, SJ
Zettl, A
Frechet, JMJ
AF Okawa, David
Pastine, Stefan J.
Zettl, Alex
Frechet, Jean M. J.
TI Surface Tension Mediated Conversion of Light to Work
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID AUTONOMOUS MOVEMENT; THERMAL-GRADIENTS; SOLAR-ENERGY; WATER; PARTICLES;
DROPLETS; MOTIONS
AB As energy demands increase, new, more direct, energy collection and utilization processes must be explored. We present a system that intrinsically combines the absorption of sunlight. with the production of useful work in the form of locomotion of objects on liquids. Focused sunlight is locally absorbed by a nanostructured composite, creating a thermal surface tension gradient and, subsequently, motion. Controlled linear motion and rotational motion are demonstrated. The system is scale independent, with remotely powered and controlled motion shown for objects in the milligram to tens of grams range.
C1 [Okawa, David; Pastine, Stefan J.; Frechet, Jean M. J.] Univ Calif Berkeley, Coll Chem, Berkeley, CA 94720 USA.
[Okawa, David; Zettl, Alex] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Zettl, Alex; Frechet, Jean M. J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Frechet, JMJ (reprint author), Univ Calif Berkeley, Coll Chem, Berkeley, CA 94720 USA.
EM frechet@berkeley.edu
RI Zettl, Alex/O-4925-2016;
OI Zettl, Alex/0000-0001-6330-136X; Frechet, Jean /0000-0001-6419-0163
FU U.S. Department of Energy [DE-AC02-05CH11231]; National Institute of
General Medical Sciences [F32GM078780]
FX The authors acknowledge financial support from the Director, Office of
Science, Office of Basic Energy Sciences, Division of Materials Sciences
and Engineering, of the U.S. Department of Energy under Contract No.
DE-AC02-05CH11231. The project described (S.J.P.) was also supported by
Award Number F32GM078780 from the National Institute of General Medical
Sciences. The content is solely the responsibility of the authors and
does not necessarily represent the official views of the National
Institute of General Medical Sciences or the National Institutes of
Health. D.O. and A.Z. received financial support from the Sea Change
Foundation. We thank Mark Llorente for the production of VANTs, Brian
Kessler for helpful discussions, and the Miller Institute (Professorship
for AZ).
NR 28
TC 47
Z9 47
U1 8
U2 27
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD APR 22
PY 2009
VL 131
IS 15
BP 5396
EP +
DI 10.1021/ja900130n
PG 4
WC Chemistry, Multidisciplinary
SC Chemistry
GA 434IJ
UT WOS:000265268100016
PM 20560635
ER
PT J
AU Todorov, I
Chung, DY
Malliakas, CD
Li, QA
Bakas, T
Douvalis, A
Trimarchi, G
Gray, K
Mitchell, JF
Freeman, AJ
Kanatzidis, MG
AF Todorov, Iliya
Chung, Duck Young
Malliakas, Christos D.
Li, Quing'an
Bakas, Thomas
Douvalis, Alexios
Trimarchi, Giancarlo
Gray, Kenneth
Mitchell, John F.
Freeman, Arthur J.
Kanatzidis, Mercouri G.
TI CaFe4As3: A Metallic Iron Arsenide with Anisotropic Magnetic and
Charge-Transport Properties
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID SUPERCONDUCTIVITY
AB The iron arsenide CaFe4As3 features a three-dimensional network derived from intergrown Fe2As2 layers and Ca ions in channels. Complex magnetic interactions between Fe atoms give rise to unexpected transitions and novel direction-dependent magnetic behavior.
C1 [Todorov, Iliya; Chung, Duck Young; Li, Quing'an; Gray, Kenneth; Mitchell, John F.; Kanatzidis, Mercouri G.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Malliakas, Christos D.] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
[Bakas, Thomas; Douvalis, Alexios] Univ Ioannina, Dept Phys, GR-45110 Ioannina, Greece.
[Trimarchi, Giancarlo; Freeman, Arthur J.] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA.
RP Kanatzidis, MG (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM m-kanatzidis@northwestern.edu
RI Li, Qingan/L-3778-2013; Trimarchi, Giancarlo/A-8225-2010
OI Trimarchi, Giancarlo/0000-0002-0365-3221
FU U.S. Department of Energy, Office of Basic Energy Sciences
[DE-AC02-06CH11357]
FX This project was supported by the U.S. Department of Energy, Office of
Basic Energy Sciences, under Contract DE-AC02-06CH11357. We thank Dr. M.
Pissas, NRCPS "Demokritos", Athens, for the magnetic susceptibility
measurements on the polycrystalline sample.
NR 16
TC 23
Z9 23
U1 4
U2 16
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD APR 22
PY 2009
VL 131
IS 15
BP 5405
EP +
DI 10.1021/ja900534h
PG 5
WC Chemistry, Multidisciplinary
SC Chemistry
GA 434IJ
UT WOS:000265268100019
PM 19334680
ER
PT J
AU Manaa, MR
Reed, EJ
Fried, LE
Goldman, N
AF Manaa, M. Riad
Reed, Evan J.
Fried, Laurence E.
Goldman, Nir
TI Nitrogen-Rich Heterocycles as Reactivity Retardants in Shocked
Insensitive Explosives
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID DETONATION; CHARGE; NITROMETHANE; MOLECULES; IMPACT; SOOT
AB We report the first quantum-based multiscale simulations to study the reactivity of shocked perfect crystals of the insensitive energetic material triaminotrinitrobenzene (TATB). Tracking chemical transformations of TATB experiencing overdriven shock speeds of 9 km/s for up to 0.43 ns and 10 km/s for up to 0.2 ns reveal high concentrations of nitrogen-rich heterocyclic clusters. Further reactivity of TATE; toward the final decomposition products of fluid N-2 and solid carbon is inhibited due to the formation of these heterocycles. bur results thus suggest a new mechanism for carbon-rich explosive materials that precedes the slow diffusion-limited process of forming the bulk solid from carbon clusters and provide fundamental insight at the atomistic level into the long reaction zone of shocked TATB.
C1 [Manaa, M. Riad; Reed, Evan J.; Fried, Laurence E.; Goldman, Nir] Lawrence Livermore Natl Lab, Energet Mat Ctr, Livermore, CA 94551 USA.
RP Manaa, MR (reprint author), Lawrence Livermore Natl Lab, Energet Mat Ctr, POB 808, Livermore, CA 94551 USA.
EM manaa1@llnl.gov
RI Fried, Laurence/L-8714-2014
OI Fried, Laurence/0000-0002-9437-7700
FU U.S. Department of Energy Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]
FX This work performed under the auspices of the U.S. Department of Energy
Lawrence Livermore National Laboratory under Contract No.
DE-AC52-07NA27344.
NR 30
TC 71
Z9 75
U1 6
U2 25
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD APR 22
PY 2009
VL 131
IS 15
BP 5483
EP 5487
DI 10.1021/ja808196e
PG 5
WC Chemistry, Multidisciplinary
SC Chemistry
GA 434IJ
UT WOS:000265268100030
PM 19323461
ER
PT J
AU Kwon, KY
Pawin, G
Wong, KL
Peters, E
Kim, D
Hong, S
Rahman, TS
Marsella, M
Bartels, L
AF Kwon, Ki-Young
Pawin, Greg
Wong, Kin L.
Peters, Eric
Kim, Daeho
Hong, Sampyo
Rahman, Talat S.
Marsella, Michael
Bartels, Ludwig
TI H-Atom Position as Pattern-Determining Factor in Arenethiol Films
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID SCANNING-TUNNELING-MICROSCOPY; SELF-ASSEMBLED MONOLAYERS; CENTER-DOT-F;
HYDROGEN-BONDS; SUPRAMOLECULAR NANOSTRUCTURES; MOLECULAR-DYNAMICS;
AU(111) SURFACE; METAL-SURFACE; CU(111); ENERGY
AB The evolution of a low coverage of benzenethiol molecules on Cu(111) during annealing shows the prevalence of S center dot center dot center dot H hydrogen bonds involving hydrogen atoms in the ortho position. The row and pattern formation of (methylated) anthracenethiols indicates intermolecular interactions in which hydrogen atoms at the terminal position of the aromatic moiety dominate. In combination, this leads to the notion that pattern formation in classes of arenethiol molecules is each governed by optimization of the intermolecular interactions of the hydrogen atom at one particular position on the arene. This may provide a general guiding principle for the design of arenethiol films.
C1 [Kwon, Ki-Young; Pawin, Greg; Wong, Kin L.; Peters, Eric; Kim, Daeho; Marsella, Michael; Bartels, Ludwig] Univ Calif Riverside, Pierce Hall Dept Chem, Riverside, CA 92521 USA.
[Kwon, Ki-Young] Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
[Pawin, Greg; Wong, Kin L.] Univ Calif Los Angeles, Dept Chem, Los Angeles, CA 90095 USA.
[Pawin, Greg; Wong, Kin L.] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA.
[Hong, Sampyo; Rahman, Talat S.] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA.
RP Bartels, L (reprint author), Univ Calif Riverside, Pierce Hall Dept Chem, Riverside, CA 92521 USA.
EM Ludwig.Bartels@ucr.edu
RI Wong, Kin/F-6907-2011; bartelsdoe, ludwig/F-8008-2011; Kim,
Daeho/D-4353-2011; Bartels, Ludwig/C-2764-2008
OI Wong, Kin/0000-0001-6776-3852; Kim, Daeho/0000-0003-4242-316X;
FU U.S. Department of Energy [DE-FG02-03ER15464, DE-FG02-07ER15842]; U.S.
National Science Foundation [0647152]
FX This work was supported by the U.S. Department of Energy under grants
DE-FG02-03ER15464 (Bartels)/DE-FG02-07ER15842 (Rahman) and the U.S.
National Science Foundation 0647152 (Bartels/Marsella). Computational
resources were made available by the San Diego Supercomputer Center.
NR 41
TC 10
Z9 10
U1 0
U2 9
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD APR 22
PY 2009
VL 131
IS 15
BP 5540
EP 5545
DI 10.1021/ja809417k
PG 6
WC Chemistry, Multidisciplinary
SC Chemistry
GA 434IJ
UT WOS:000265268100037
PM 19331392
ER
PT J
AU Balhorn, R
Hok, S
DeNardo, S
Natarajan, A
Mirick, G
Corzett, M
DeNardo, G
AF Balhorn, Rod
Hok, Saphon
DeNardo, Sally
Natarajan, Arutselvan
Mirick, Gary
Corzett, Michele
DeNardo, Gerald
TI Hexa-arginine enhanced uptake and residualization of selective high
affinity ligands by Raji lymphoma cells
SO MOLECULAR CANCER
LA English
DT Article
ID NON-HODGKINS-LYMPHOMA; ELECTRON-EMITTING RADIONUCLIDES;
MONOCLONAL-ANTIBODY; CANCER-THERAPY; DRUG-DELIVERY; IN-VITRO;
INTRACELLULAR DELIVERY; PENETRATING PEPTIDES; GENE DELIVERY; RICH
PEPTIDES
AB Background: A variety of arginine-rich peptide sequences similar to those found in viral proteins have been conjugated to other molecules to facilitate their transport into the cytoplasm and nucleus of targeted cells. The selective high affinity ligand (SHAL) (DvLPBaPPP)(2)LLDo, which was developed to bind only to cells expressing HLA-DR10, has been conjugated to one of these peptide transduction domains, hexa-arginine, to assess the impact of the peptide on SHAL uptake and internalization by Raji cells, a B-cell lymphoma.
Results: An analog of the SHAL (DvLPBaPPP)(2)LLDo containing a hexa-arginine peptide was created by adding six D-arginine residues sequentially to a lysine inserted in the SHAL's linker. SHAL binding, internalization and residualization by Raji cells expressing HLA-DR10 were examined using whole cell binding assays and confocal microscopy. Raji cells were observed to bind two fold more (111)In-labeled hexa-arginine SHAL analog than Raji cells treated with the parent SHAL. Three fold more hexa-arginine SHAL remained associated with the Raji cells after washing, suggesting that the peptide also enhanced residualization of the (111)In transported into cells. Confocal microscopy showed both SHALs localized in the cytoplasm of Raji cells, whereas a fraction of the hexa-arginine SHAL localized in the nucleus.
Conclusion: The incorporation of a hexa-D-arginine peptide into the linker of the SHAL (DvLPBaPPP)(2)LLDo enhanced both the uptake and residualization of the SHAL analog by Raji cells. In contrast to the abundant cell surface binding observed with Lym-1 antibody, the majority of (DvLPBaPPP)(2)LArg6AcLLDo and the parent SHAL were internalized. Some of the internalized hexa-arginine SHAL analog was also associated with the nucleus. These results demonstrate that several important SHAL properties, including uptake, internalization, retention and possibly intracellular distribution, can be enhanced or modified by conjugating the SHALs to a short polypeptide.
C1 [Balhorn, Rod] Lawrence Livermore Natl Lab, Dept Appl Sci, Livermore, CA 94551 USA.
[Balhorn, Rod; Hok, Saphon; Corzett, Michele] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[DeNardo, Sally; Natarajan, Arutselvan; Mirick, Gary; DeNardo, Gerald] Univ Calif Davis, Med Ctr, Sacramento, CA 95816 USA.
RP Balhorn, R (reprint author), Lawrence Livermore Natl Lab, Dept Appl Sci, Hertz Hall,POB 751, Livermore, CA 94551 USA.
EM rodbalhorn@hughes.net; hok2@llnl.gov; sjdenardo@ucdavis.edu;
arutselvan.natarajan@ucdmc.ucdavis.edu; Gary.Mirick@sbcglobal.net;
corzett1@llnl.gov; gldenardo@ucdavis.edu
FU National Cancer Institute [PO1-CA47829]; Lawrence Livermore National
Laboratory; Lawrence Livermore National Security, LLC; U. S. Department
of Energy, National Nuclear Security Administration [DE-AC52-07NA27344]
FX This work was supported by the National Cancer Institute PO1-CA47829.
Lawrence Livermore National Laboratory is operated by Lawrence Livermore
National Security, LLC, for the U. S. Department of Energy, National
Nuclear Security Administration under Contract DE-AC52-07NA27344.
NR 50
TC 1
Z9 1
U1 0
U2 5
PU BIOMED CENTRAL LTD
PI LONDON
PA CURRENT SCIENCE GROUP, MIDDLESEX HOUSE, 34-42 CLEVELAND ST, LONDON W1T
4LB, ENGLAND
SN 1476-4598
J9 MOL CANCER
JI Mol. Cancer
PD APR 22
PY 2009
VL 8
AR 25
DI 10.1186/1476-4598-8-25
PG 9
WC Biochemistry & Molecular Biology; Oncology
SC Biochemistry & Molecular Biology; Oncology
GA 449IB
UT WOS:000266323000001
PM 19383174
ER
PT J
AU Raman, B
Pan, C
Hurst, GB
Rodriguez, M
McKeown, CK
Lankford, PK
Samatova, NF
Mielenz, JR
AF Raman, Babu
Pan, Chongle
Hurst, Gregory B.
Rodriguez, Miguel, Jr.
McKeown, Catherine K.
Lankford, Patricia K.
Samatova, Nagiza F.
Mielenz, Jonathan R.
TI Impact of Pretreated Switchgrass and Biomass Carbohydrates on
Clostridium thermocellum ATCC 27405 Cellulosome Composition: A
Quantitative Proteomic Analysis
SO PLOS ONE
LA English
DT Article
AB Background: Economic feasibility and sustainability of lignocellulosic ethanol production requires the development of robust microorganisms that can efficiently degrade and convert plant biomass to ethanol. The anaerobic thermophilic bacterium Clostridium thermocellum is a candidate microorganism as it is capable of hydrolyzing cellulose and fermenting the hydrolysis products to ethanol and other metabolites. C. thermocellum achieves efficient cellulose hydrolysis using multiprotein extracellular enzymatic complexes, termed cellulosomes.
Methodology/Principal Findings: In this study, we used quantitative proteomics (multidimensional LC-MS/MS and N-15-metabolic labeling) to measure relative changes in levels of cellulosomal subunit proteins (per CipA scaffoldin basis) when C. thermocellum ATCC 27405 was grown on a variety of carbon sources [dilute-acid pretreated switchgrass, cellobiose, amorphous cellulose, crystalline cellulose (Avicel) and combinations of crystalline cellulose with pectin or xylan or both]. Cellulosome samples isolated from cultures grown on these carbon sources were compared to N-15 labeled cellulosome samples isolated from crystalline cellulose-grown cultures. In total from all samples, proteomic analysis identified 59 dockerin-and 8 cohesin-module containing components, including 16 previously undetected cellulosomal subunits. Many cellulosomal components showed differential protein abundance in the presence of non-cellulose substrates in the growth medium. Cellulosome samples from amorphous cellulose, cellobiose and pretreated switchgrass-grown cultures displayed the most distinct differences in composition as compared to cellulosome samples from crystalline cellulose-grown cultures. While Glycoside Hydrolase Family 9 enzymes showed increased levels in the presence of crystalline cellulose, and pretreated switchgrass, in particular, GH5 enzymes showed increased levels in response to the presence of cellulose in general, amorphous or crystalline.
Conclusions/Significance: Overall, the quantitative results suggest a coordinated substrate-specific regulation of cellulosomal subunit composition in C. thermocellum to better suit the organism's needs for growth under different conditions. To date, this study provides the most comprehensive comparison of cellulosomal compositional changes in C. thermocellum in response to different carbon sources. Such studies are vital to engineering a strain that is best suited to grow on specific substrates of interest and provide the building blocks for constructing designer cellulosomes with tailored enzyme composition for industrial ethanol production.
RP Raman, B (reprint author), Oak Ridge Natl Lab, Biosci Div, Oak Ridge, TN 37831 USA.
EM mielenzjr@ornl.gov
OI Hurst, Gregory/0000-0002-7650-8009
NR 58
TC 132
Z9 134
U1 3
U2 39
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD APR 22
PY 2009
VL 4
IS 4
AR e5271
DI 10.1371/journal.pone.0005271
PG 13
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 437VB
UT WOS:000265513900014
PM 19384422
ER
PT J
AU Gee, GW
Newman, BD
Green, SR
Meissner, R
Rupp, H
Zhang, ZF
Keller, JM
Waugh, WJ
van der Velde, M
Salazar, J
AF Gee, G. W.
Newman, B. D.
Green, S. R.
Meissner, R.
Rupp, H.
Zhang, Z. F.
Keller, J. M.
Waugh, W. J.
van der Velde, M.
Salazar, J.
TI Passive wick fluxmeters: Design considerations and field applications
SO WATER RESOURCES RESEARCH
LA English
DT Article
ID MEASURING WATER FLUX; ZERO-TENSION PAN; VADOSE ZONE; COLLECTION
EFFICIENCY; LEACHATE COLLECTION; CAPILLARY SAMPLERS; NUMERICAL-ANALYSIS;
FIBERGLASS WICKS; SUCTION PLATES; SOIL
AB Optimization of water use in agriculture and quantification of percolation from landfills and watersheds require reliable estimates of vadose zone water fluxes. Current technology is limited primarily to lysimeters, which directly measure water flux but are expensive and may in some way disrupt flow, causing errors in the measured drainage. We report on design considerations and field tests of an alternative approach, passive wick fluxmeters, which use a control tube to minimize convergent or divergent flow. Design calculations with a quasi-three-dimensional model illustrate how convergence and divergence can be minimized for a range of soil and climatic conditions under steady state and transient fluxes using control tubes of varying heights. There exists a critical recharge rate for a given wick length, where the fluxmeter collection efficiency is 100% regardless of the height of the control tube. Otherwise, convergent or divergent flow will occur, especially when the control tube height is small. While divergence is eliminated in coarse soils using control tubes, it is reduced but not eliminated in finer soils, particularly for fluxes < 100 mm/a. Passive wick fluxmeters were tested in soils ranging from nonvegetated semiarid settings in the United States to grasslands in Germany and rain-fed crops in New Zealand and the South Pacific. Where side-by-side comparisons of drainage were made between passive wick fluxmeters and conventional lysimeters in the United States and Germany, agreement was very good. In semiarid settings, drainage was found to depend upon precipitation distribution, surface soil, topographic relief, and the type and amount of vegetation. In Washington State, United States, soil texture dominated all factors controlling drainage from test landfill covers. As expected, drainage was greatest (> 60% annual precipitation) from gravel surfaces and least (no drainage) from silt loam soils. In Oregon and New Mexico, United States, and in New Zealand, drainage showed substantial spatial variability. The New Mexico tests were located in semiarid canyon bottom terraces, with flash flood prone locations having extremely high drainage/precipitation ratios. In the wettest environments, drainage was found to be closely linked to the rate and duration of precipitation events.
C1 [Gee, G. W.; Zhang, Z. F.] Pacific NW Natl Lab, Div Energy & Environm, Hydrol Grp, Richland, WA 99352 USA.
[Green, S. R.] HortResearch, Sustainable Land Use, Palmerston North 4442, New Zealand.
[Keller, J. M.] GeoSyst Anal Inc, Hood River, OR 97031 USA.
[Meissner, R.; Rupp, H.] UFZ Helmholtz Ctr Environm Res, Dept Soil Phys, D-39615 Falkenberg, Germany.
[Newman, B. D.] IAEA, Isotope Hydrol Sect, A-1400 Vienna, Austria.
[Salazar, J.] Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
[van der Velde, M.] Inst Environm & Sustainabil, European Commiss, Joint Res Ctr, I-21020 Ispra, Italy.
[Waugh, W. J.] SM Stoller Corp, Grand Junction, CO 81503 USA.
RP Gee, GW (reprint author), Pacific NW Natl Lab, Div Energy & Environm, Hydrol Grp, Richland, WA 99352 USA.
EM glendon.gee@pnl.gov
RI van der Velde, Marijn/B-3305-2009; Green, Steve/I-3938-2013;
OI Green, Steve/0000-0002-4020-3430; Zhang, Fred/0000-0001-8676-6426
FU U.S. Department of Energy [DE-AC06-76RL01830]
FX This work was performed as part of the Hanford Remediation Closure
project for the Richland Operations Office of the U.S. Department of
Energy under contract DE-AC06-76RL01830. We acknowledge our
collaborators, A. Anandacoomaraswamy and his staff at the Tea Research
Institute, Talawakele, Sri Lanka, and the Environmental Group, Hort
Research Group, Palmerston North, New Zealand. We also acknowledge the
generous support from two commercial water fluxmeter suppliers, Decagon
Devices, Pullman, Washington, United States www. decagon. com), and
Sledge Sales, Dayton, Oregon, United States http://sledgesales.com), who
provided test instruments and have been willing to modify equipment as
designs and applications have evolved. Funding for the Los Alamos study
was provided by the Los Alamos National Laboratory Environmental
Restoration Project, and we thank Danny Katzman for his support. We also
wish to acknowledge Marvin Gard, Bob Gray, and Tracy Schofield for their
assistance in the field. Funding for the Oregon study was provided by
the U. S. Department of Energy Office of Legacy Management.
NR 48
TC 21
Z9 21
U1 5
U2 20
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0043-1397
J9 WATER RESOUR RES
JI Water Resour. Res.
PD APR 22
PY 2009
VL 45
AR W04420
DI 10.1029/2008WR007088
PG 18
WC Environmental Sciences; Limnology; Water Resources
SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water
Resources
GA 438EX
UT WOS:000265539800003
ER
PT J
AU Herbst, RW
Guce, A
Bryngelson, PA
Higgins, KA
Ryan, KC
Cabelli, DE
Garman, SC
Maroney, MJ
AF Herbst, Robert W.
Guce, Abigail
Bryngelson, Peter A.
Higgins, Khadine A.
Ryan, Kelly C.
Cabelli, Diane E.
Garman, Scott C.
Maroney, Michael J.
TI Role of Conserved Tyrosine Residues in NiSOD Catalysis: A Case of
Convergent Evolution
SO BIOCHEMISTRY
LA English
DT Article
ID MANGANESE SUPEROXIDE-DISMUTASE; LOW-TEMPERATURE THERMOCHROMISM;
ACTIVE-SITE; ESCHERICHIA-COLI; REACTION-MECHANISM; STRUCTURAL
INVESTIGATIONS; CRYSTAL-STRUCTURE; NICKEL-COMPLEXES; GLUTAMATE BRIDGE;
METAL-COMPLEXES
AB Superoxide dismutases rely on protein structural elements to adjust the redox potential of the metallocenter to an optimum value near 300 mV (vs NHE), to provide a source of protons for catalysis, and to control the access of anions to the active site. These aspects of the catalytic mechanism are examined herein for recombinant preparations of the nickel-dependent SOD (NiSOD) from Streptomyces coelicolor and for a series of mutants that affect a key tyrosine residue, Tyr9 (Y9F-, Y62F-, Y9F/Y62F-, and D3A-NiSOD). Structural aspects of the nickel sites are examined by a combination of EPR and X-ray absorption spectroscopies, and by single-crystal X-ray diffraction at similar to 1.9 angstrom resolution in the case of Y917- and D3A-NiSODs. The functional effects of the mutations are examined by kinetic studies employing pulse radiolytic generation of O(2)(-) and by redox titrations. These studies reveal that although the structure of the nickel center in NiSOD is unique, the ligand environment is designed to optimize the redox potential at 290 mV and results in the oxidation of 50% of the nickel centers in the oxidized hexamer. Kinetic investigations show that all of the mutant proteins have considerable activity. In the case of Y9F-NiSOD, the enzyme exhibits saturation behavior that is not observed in wild-type (WT) NiSOD and suggests that release of peroxide is inhibited. The crystal structure of Y9F-NiSOD reveals an anion binding site that is occupied by either Cl(-) or Br(-) and is located close to but not within bonding distance of the nickel center. The structure of D3A-NiSOD reveals that in addition to affecting the interaction between subunits, this mutation repositions Tyr9 and leads to altered chemistry with peroxide. Comparisons with Mn(SOD) and Fe(SOD) reveal that although different strategies for adjusting the redox potential and supply of protons are employed, NiSOD has evolved a similar strategy for controlling the access of anions to the active site.
C1 [Herbst, Robert W.; Guce, Abigail; Bryngelson, Peter A.; Higgins, Khadine A.; Ryan, Kelly C.; Garman, Scott C.; Maroney, Michael J.] Univ Massachusetts, Dept Chem, Amherst, MA 01003 USA.
[Garman, Scott C.] Univ Massachusetts, Dept Biochem & Mol Biol, Amherst, MA 01003 USA.
[Cabelli, Diane E.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
RP Garman, SC (reprint author), Univ Massachusetts, Dept Chem, Amherst, MA 01003 USA.
EM mmaroney@chemistry.umass.edu
FU National Science Foundation [MCB-0321482, CHE-0809188]; University of
Massachusetts; Charles H. Hood Foundation; U.S. Department of Energy;
Division of Materials Sciences and Division of Chemical Sciences; U.S.
Department of Energy [DE-AC02-98CH 10886]
FX This work was Supported by National Science Foundation Grants
MCB-0321482 and CHE-0809188 to M.J.M. S.C.G. acknowledges the University
of Massachusetts and the Charles H. Hood Foundation for support. The
U.S. Department of Energy, Division of Materials Sciences and Division
of Chemical Sciences, supported XAS and X-ray diffraction data
collection at the National Synchrotron Light Source (NSLS) at Brookhaven
National Laboratory. The National Institutes of Health supports
beamlines X313 and X6A at NSLS. Pulse radiolysis studies were funded
under Contract DE-AC02-98CH 10886 with the U.S. Department of Energy.
NR 74
TC 38
Z9 38
U1 1
U2 11
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0006-2960
J9 BIOCHEMISTRY-US
JI Biochemistry
PD APR 21
PY 2009
VL 48
IS 15
BP 3354
EP 3369
DI 10.1021/bi802029t
PG 16
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 432YL
UT WOS:000265170200012
PM 19183068
ER
PT J
AU Heroux, A
Bozinovski, DM
Valley, MP
Fitzpatrick, PF
Orville, AM
AF Heroux, Annie
Bozinovski, Dragana M.
Valley, Michael P.
Fitzpatrick, Paul F.
Orville, Allen M.
TI Crystal Structures of Intermediates in the Nitroalkane Oxidase Reaction
SO BIOCHEMISTRY
LA English
DT Article
ID ACYL-COA DEHYDROGENASE; FAD-CONTAINING FORM; FUSARIUM-OXYSPORUM;
SUBSTRATE-SPECIFICITY; MECHANISM; FLAVIN; CHAIN; ACTIVATION; MUTATION;
COMPLEX
AB The flavoenzyme nitroalkane oxidase is a member of the acyl-CoA dehydrogenase superfamily. Nitroalkane oxidase catalyzes the oxidation of neutral nitroalkanes to nitrite and the corresponding aldehydes or ketones. Crystal structures to 2.2 angstrom resolution or better of enzyme complexes with bound substrates and of a trapped substrate-flavin adduct are described. The D402N enzyme has no detectable activity with neutral nitroalkanes [Valley, M. P., and Fitzpatrick, P. F. (2003) J. Am. Chem. Soc. 125, 8738-8739]. The structure of the D402N enzyme crystallized in the presence of 1-nitrohexane or 1-nitrooctane shows the presence of the substrate in the binding site. The aliphatic chain of the substrate extends into a tunnel leading to the enzyme surface. The oxygens of the substrate nitro group interact both with amino acid residues and with the 2'-hydroxyl of the FAD. When nitroalkane oxidase oxidizes nitroalkanes in the presence of cyanide, an electrophilic flavin imine intermediate can be trapped [Valley, M. P., Tichy, S. E., and Fitzpatrick, P. F. (2005) J. Am. Chem. Soc. 127, 2062-2066]. The structure of the enzyme trapped with cyanide during oxidation of 1-nitrohexane shows the presence of the modified flavin. A continuous hydrogen bond network connects the nitrogen of the CN-hexyl-FAD through the FAD 2'-hydroxyl to a chain of water molecules extending to the protein surface. Together, our complementary approaches provide strong evidence that the flavin cofactor is in the appropriate oxidation state and correlates well with the putative intermediate state observed within each of the crystal structures. Consequently, these results provide important structural descriptions of several steps along the nitroalkane oxidase reaction cycle.
C1 [Bozinovski, Dragana M.; Valley, Michael P.; Fitzpatrick, Paul F.] Texas A&M Univ, Dept Biochem & Biophys, College Stn, TX 77843 USA.
[Fitzpatrick, Paul F.] Texas A&M Univ, Dept Chem, College Stn, TX 77843 USA.
[Heroux, Annie; Orville, Allen M.] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
RP Fitzpatrick, PF (reprint author), Univ Texas Hlth Sci Ctr San Antonio, Dept Biochem, MC 7760, San Antonio, TX 78229 USA.
EM fitzpatrick@biochem.uthscsa.edu; amorv@bnl.gov
FU National Institutes of Health [GM058698]; The Welch Foundation [A-1245];
A.M.O. from the Offices of Biological and Environmental Research; U.S.
Department of Energy; National Center for Research Resources [2 P41
RR012408]; National Institutes of Health; Use of the National
Synchrotron Light Source at Brookhaven National Laboratory; U.S.
Department of Energy Office of Basic Energy Sciences [DE-AC02-98CH
10886]
FX This research was Supported in part by grants to P.F.F. from the
National Institutes of Health (GM058698) and The Welch Foundation
(A-1245) and to A.M.O. from the Offices of Biological and Environmental
Research, U.S. Department of Energy, the National Center for Research
Resources (2 P41 RR012408) of the National Institutes of Health, and the
U.S. Department of Energy. Use of the National Synchrotron Light Source
at Brookhaven National Laboratory was supported by the U.S. Department
of Energy Office of Basic Energy Sciences, under Contract DE-AC02-98CH
10886.
NR 24
TC 16
Z9 17
U1 0
U2 6
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0006-2960
J9 BIOCHEMISTRY-US
JI Biochemistry
PD APR 21
PY 2009
VL 48
IS 15
BP 3407
EP 3416
DI 10.1021/bi8023042
PG 10
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 432YL
UT WOS:000265170200017
PM 19265437
ER
PT J
AU Perry, JJP
Hearn, AS
Cabelli, DE
Nick, HS
Tainer, JA
Silverman, DN
AF Perry, J. Jefferson P.
Hearn, Amy S.
Cabelli, Diane E.
Nick, Harry S.
Tainer, John A.
Silverman, David N.
TI Contribution of Human Manganese Superoxide Dismutase Tyrosine 34 to
Structure and Catalysis
SO BIOCHEMISTRY
LA English
DT Article
ID AMYOTROPHIC-LATERAL-SCLEROSIS; ACTIVE-SITE; THERMUS-THERMOPHILUS;
TETRAMERIC INTERFACE; DIMERIC INTERFACE; AQUEOUS-SOLUTIONS;
CRYSTAL-STRUCTURE; PULSE-RADIOLYSIS; PROSTATE-CANCER; GLUTAMINE 143
AB Superoxide dismutase (SOD) enzymes are critical in controlling levels of reactive oxygen species (ROS) that are linked to aging, cancer, and neurodegenerative disease. Superoxide (O(2)(center dot-)) produced during respiration is removed by the product of the SOD2 gene, the homotetrameric manganese superoxide dismutase (MnSOD). Here, we examine the structural and catalytic roles of the highly conserved active-site residue Tyr34, based upon structure-function studies of MnSOD enzymes with mutations at this site. Substitution of Tyr34 with five different amino acids retained the active-site protein structure and assembly but caused a substantial decrease in the catalytic rate constant for the reduction of superoxide. The rate constant for formation of the product inhibition complex also decreases but to a much lesser extent, resulting in a net increase in the level of product inhibited form of the mutant enzymes. Comparisons of crystal structures and catalytic rates also suggest that one mutation, Y34V, interrupts the hydrogen-bonded network, which is associated with a rapid dissociation of the product-inhibited complex. Notably, with three of the Tyr34 mutants, we also observe an intermediate in catalysis, which has not been reported previously. Thus, these mutants establish a means of trapping a catalytic intermediate that promises to help elucidate the mechanism of catalysis.
C1 [Perry, J. Jefferson P.; Tainer, John A.] Scripps Res Inst, Dept Mol Biol, La Jolla, CA 92037 USA.
[Perry, J. Jefferson P.] Amrita Univ, Sch Biotechnol, Kollam 690525, Kerala, India.
[Tainer, John A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Mol Biol, Berkeley, CA 94720 USA.
[Cabelli, Diane E.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
[Hearn, Amy S.; Nick, Harry S.] Univ Florida, Dept Neurosci, Gainesville, FL 32510 USA.
[Silverman, David N.] Univ Florida, Dept Pharmacol, Gainesville, FL 32610 USA.
RP Perry, JJP (reprint author), Scripps Res Inst, Dept Mol Biol, 10666 N Torrey Pines Rd, La Jolla, CA 92037 USA.
EM jjperry@scripps.edu; silvrmn@ufl.edu
FU National Institutes of Health [GM54903]
FX This work was supported by National Institutes of Health Grant GM54903
to D.N.S.
NR 56
TC 27
Z9 30
U1 2
U2 15
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0006-2960
J9 BIOCHEMISTRY-US
JI Biochemistry
PD APR 21
PY 2009
VL 48
IS 15
BP 3417
EP 3424
DI 10.1021/bi8023288
PG 8
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 432YL
UT WOS:000265170200018
PM 19265433
ER
PT J
AU Agrelo, R
Souabni, A
Novatchkova, M
Haslinger, C
Leeb, M
Komnenovic, V
Kishimoto, H
Gresh, L
Kohwi-Shigematsu, T
Kenner, L
Wutz, A
AF Agrelo, Ruben
Souabni, Abdallah
Novatchkova, Maria
Haslinger, Christian
Leeb, Martin
Komnenovic, Vukoslav
Kishimoto, Hiroyuki
Gresh, Lionel
Kohwi-Shigematsu, Terumi
Kenner, Lukas
Wutz, Anton
TI SATB1 Defines the Developmental Context for Gene Silencing by Xist in
Lymphoma and Embryonic Cells
SO DEVELOPMENTAL CELL
LA English
DT Article
ID X-CHROMOSOME INACTIVATION; MAR-BINDING PROTEIN; STEM-CELLS; HISTONE
MACROH2A1; EXPRESSION; DIFFERENTIATION; MAINTENANCE; INITIATION;
LOCALIZATION; PROPAGATION
AB The noncoding Xist RNA triggers silencing of one of the two female X chromosomes during X inactivation in mammals. Gene silencing by Xist is restricted to a special developmental context in early embryos and specific hematopoietic precursors. Here, we show that Xist can initiate silencing in a lymphoma model. We identify the special AT-rich binding protein SATB1 as an essential silencing factor. Loss of SATB1 in tumor cells abrogates the silencing function of Xist. In lymphocytes Xist localizes along SATB1-organized chromatin and SATB1 and Xist influence each other's pattern of localization. SATB1 and its homolog SATB2 are expressed during the initiation window for X inactivation in ES cells. Importantly, viral expression of SATB1 or SATB2 enables gene silencing by Xist in embryonic fibroblasts, which normally do not provide an initiation context. Thus, our data establish SATB1 as a crucial silencing factor contributing to the initiation of X inactivation.
C1 [Agrelo, Ruben; Souabni, Abdallah; Novatchkova, Maria; Leeb, Martin; Komnenovic, Vukoslav; Kishimoto, Hiroyuki; Gresh, Lionel; Wutz, Anton] Res Inst Mol Pathol, A-1030 Vienna, Austria.
[Haslinger, Christian] Boehringer Ingelheim Austria, A-1121 Vienna, Austria.
[Kohwi-Shigematsu, Terumi] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA.
[Kenner, Lukas] Inst Klin Pathol, A-1090 Vienna, Austria.
[Kenner, Lukas] LBI CR, A-1090 Vienna, Austria.
RP Wutz, A (reprint author), Res Inst Mol Pathol, Dr Bohr Gasse 7, A-1030 Vienna, Austria.
EM wutz@imp.univie.ac.at
RI Leeb, Martin/N-3861-2015;
OI Gresh, Lionel/0000-0002-2333-1748; Leeb, Martin/0000-0001-5114-4782;
Kenner, Lukas/0000-0003-2184-1338
FU Vienna Science and Technology Fund (WWTF); Boehringer Ingelheim;
Austrian Science Fund (FWF)
FX We thank Gabi Stengl for FACS analysis, Pavel Pasierbek for help with
miroscopy, Johannes Tkadletz for figure preparation, Andreas Bichl and
Denise Imre for maintenance of the mouse colony, and Erwin F. Wagner,
Denise Barlow, and Joseph Penninger for critically reading the
mansucript. We thank Masaru Miyano for thymic cell preparations. This
research was supported by a grant from the Vienna Science and Technology
Fund (WWTF), by the IMP through Boehringer Ingelheim, and the Austrian
Science Fund (FWF). The IMP is funded in part through Boehringer
Ingelheim and C.H. is employed by Boehringer Ingelheim.
NR 45
TC 125
Z9 130
U1 0
U2 9
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 1534-5807
J9 DEV CELL
JI Dev. Cell
PD APR 21
PY 2009
VL 16
IS 4
BP 507
EP 516
DI 10.1016/j.devcel.2009.03.006
PG 10
WC Cell Biology; Developmental Biology
SC Cell Biology; Developmental Biology
GA 437EX
UT WOS:000265470400007
PM 19386260
ER
PT J
AU Ho, PJ
Miller, MR
Santra, R
AF Ho, Phay J.
Miller, Michelle R.
Santra, Robin
TI Field-free molecular alignment for studies using x-ray pulses from a
synchrotron radiation source
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
DE dichroism; molecular orientation; synchrotron radiation; X-ray
absorption; X-ray scattering
ID POLARIZED INELASTIC-SCATTERING; NONRESONANT LASER FIELDS; ABSORPTION
FINE-STRUCTURE; RAMAN-SPECTROSCOPY; K EDGE; DIATOMIC-MOLECULES; ALIGNING
MOLECULES; PENDULAR STATES; WAVE-PACKETS; DIFFRACTION
AB A short, intense laser pulse may be employed to create a spatially aligned molecular sample that persists after the laser pulse is over. We theoretically investigate whether this impulsive molecular alignment technique may be exploited for experiments using x-ray pulses from a third-generation synchrotron radiation facility. Using a linear rigid rotor model, the alignment dynamics of model molecular systems with systematically increasing size is calculated utilizing both a quantum density matrix formalism and a classical ensemble method. For each system, the alignment dynamics obtained for a 95 ps laser is compared with that obtained for a 10 ps laser pulse. The average degree of alignment after the laser pulse, as calculated quantum mechanically, increases with the size of the molecule. This effect is quantitatively reproduced by the classical calculations. The average degree of impulsive alignment is high enough to induce a pronounced linear dichroism in resonant x-ray absorption using the intense 100 ps x-ray pulses currently available. However, for structural studies based on elastic x-ray scattering, bright x-ray pulses with a duration of 1 ps or shorter will be required in order to make full use of impulsive molecular alignment.
C1 [Ho, Phay J.; Santra, Robin] Argonne Natl Lab, Argonne, IL 60439 USA.
[Miller, Michelle R.] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA.
[Santra, Robin] Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
RP Ho, PJ (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM rsantra@anl.gov
RI Santra, Robin/E-8332-2014
OI Santra, Robin/0000-0002-1442-9815
FU Office of Basic Energy Sciences, Office of Science, US Department of
Energy [DE-AC02-06CH11357]
FX We thank Elliot Kanter, Stephen Southworth, and Linda Young for
discussions. This work was supported by the Office of Basic Energy
Sciences, Office of Science, US Department of Energy, under Contract No.
DE-AC02-06CH11357. M. M. would like to thank Argonne National Laboratory
and the US Department of Energy, Office of Science for creating,
organizing, and funding the Science Undergraduate Laboratory Internship
program.
NR 78
TC 7
Z9 7
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD APR 21
PY 2009
VL 130
IS 15
AR 154310
DI 10.1063/1.3120608
PG 9
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 437KL
UT WOS:000265486300023
PM 19388749
ER
PT J
AU Voulgarakis, NK
Rasmussen, KO
Welch, PM
AF Voulgarakis, N. K.
Rasmussen, K. O.
Welch, P. M.
TI Dendrimers as synthetic gene vectors: Cell membrane attachment
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
DE biomembranes; cellular biophysics; DNA; genetics; molecular biophysics
ID ATOMIC-FORCE MICROSCOPY; POLY(AMIDOAMINE) DENDRIMERS;
MOLECULAR-DYNAMICS; PAMAM DENDRIMERS; CHARGED SURFACE; PORE FORMATION;
DRUG-DELIVERY; ADSORPTION; POLYELECTROLYTES; MODEL
AB We present molecular-level simulations of dendrimer/DNA complexes in the presence of a model cell membrane. We determine the required conditions for the complex to arrive intact at the membrane, and the lifetime of the complex as it resides attached to the membrane. Our simulations directly pertain to critical issues arising in emerging gene delivery therapeutic applications, where a molecular carrier is required to deliver DNA segments to the interior of living cells.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP Voulgarakis, NK (reprint author), Univ Calif Berkeley, Dept Chem Engn, 101A Gilman Hall, Berkeley, CA 94720 USA.
EM nvoul@berkeley.edu
RI Rasmussen, Kim/B-5464-2009; Voulgarakis, Nikolaos/A-8711-2010;
OI Rasmussen, Kim/0000-0002-4029-4723; Welch, Paul/0000-0001-5614-2065
FU U. S. Department of Energy Office of Biological and Environmental
Research [SCFY081004]
FX This work was carried out under the auspices of the National Nuclear
Security Administration of the U. S. Department of Energy at the Los
Alamos National Laboratory under Contract No. DE-AC52-06NA25396. This
work is supported by the U. S. Department of Energy Office of Biological
and Environmental Research under work proposal number SCFY081004.
NR 30
TC 17
Z9 17
U1 1
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD APR 21
PY 2009
VL 130
IS 15
AR 155101
DI 10.1063/1.3109902
PG 5
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 437KL
UT WOS:000265486300043
PM 19388769
ER
PT J
AU Zhang, LN
Singh, S
Tian, CS
Shen, YR
Wu, Y
Shannon, MA
Brinker, CJ
AF Zhang, Luning
Singh, Seema
Tian, Chuanshan
Shen, Y. Ron
Wu, Yan
Shannon, Mark A.
Brinker, C. Jeffery
TI Nanoporous silica-water interfaces studied by sum-frequency vibrational
spectroscopy
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
DE adsorption; atomic force microscopy; fractals; liquid structure;
nanoporous materials; pH; silicon compounds; surface charging; thin
films; water
ID ATOMIC-FORCE MICROSCOPE; MESOPOROUS THIN-FILMS; SUPERHYDROPHOBIC STATES;
PROTON TRANSPORT; SOLID-SURFACES; GENERATION; CHARGE; DESALINATION;
CALIBRATION; TRANSITION
AB Using sum-frequency vibrational spectroscopy, we found that water structure at nanoporous silica/water interfaces depended on the nanoporous film structure. For a periodic, self-assembled nanoporous film with monosized 2 nm pores occupying 20% of the top surface area, the surface vibrational spectrum was dominated by water in contact with silica, bare or covered by silane, at the top surface. It resembled the spectral characteristic of the hydrophilic water/silica or the hydrophobic water/silane interface. For a fractal nanoporous film with pores ranging from 5 to 50 nm in size occupying 90% of the top surface, the spectrum for a trimethyl silane-coated superhydrophobic porous film resembled largely that of a water/air interface. Only when the silane was completely removed would the spectrum revert to that characteristic of a hydrophilic water/silica interface. The surface charging behaviors of the bare nanoporous films in water with different pH were monitored by spectroscopic measurements and atomic force microscopy force measurements. The point of zero charge for the periodic porous film is around pH 2, similar to that of the flat silica surface. The point of zero charge could only be determined to be pH < 6 for the fractal porous film because the thin fractal solid network limited the amount of surface charge and therefore, the accuracy of the measurements.
C1 [Zhang, Luning; Tian, Chuanshan; Shen, Y. Ron] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Singh, Seema; Brinker, C. Jeffery] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Wu, Yan; Shannon, Mark A.] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
[Brinker, C. Jeffery] Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA.
RP Shen, YR (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM luning.zhang@sri.com; seesing@sandia.gov; yrshen@calmail.berkeley.edu
FU NSF Science and Technology Center of Advanced Materials for Purification
of Water with Systems [CTS-0120978]; Office of Science, U. S. Department
of Energy; Sandia National Laboratory; Air Force Office of Scientific
Research; LUNA Innovations
FX This work was supported by the NSF Science and Technology Center of
Advanced Materials for Purification of Water with Systems (Water CAMPWS;
Grant No. CTS-0120978). C.J.B. and S. S. acknowledge the support from
Office of Science, U. S. Department of Energy, LDRD program of Sandia
National Laboratory, Air Force Office of Scientific Research, and LUNA
Innovations.
NR 56
TC 22
Z9 22
U1 3
U2 40
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD APR 21
PY 2009
VL 130
IS 15
AR 154702
DI 10.1063/1.3118906
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 437KL
UT WOS:000265486300039
PM 19388765
ER
PT J
AU Colaco, R
Serro, AP
Eryilmaz, OL
Erdemir, A
AF Colaco, R.
Serro, A. P.
Eryilmaz, O. L.
Erdemir, A.
TI Micro-to-nano triboactivity of hydrogenated DLC films
SO JOURNAL OF PHYSICS D-APPLIED PHYSICS
LA English
DT Article
ID ATOMIC-FORCE MICROSCOPE; CARBON COATINGS; WEAR; NANOINDENTATION;
TRIBOLOGY; FRICTION; SCALE; TIP
AB In this paper, we present the results of a systematic study directed toward submicrometric scale triboactivity of a range of hydrogenated diamond-like-carbon (H: DLC) films derived from source gases with different hydrogen-to-carbon ratios. The H: DLC films were deposited on Si substrates in a plasma enhanced chemical vapour deposition system. Specifically, we produced three kinds of H: DLC films, using pure acetylene, pure methane and 25% methane +75% hydrogen as the precursor source gases. Samples were subjected to wettability and depth sensing ultramicroindentation tests, and micro-to-nanoscale friction and wear studies using a nanotribometer and an atomic force microscope. The results of our study revealed a very close correlation between the wettability and the tribo-mechanical response of the H: DLC films at micro-to-nanoscales and their hydrogen-to-carbon ratio, i.e. lower hydrogen-to-carbon ratio leads to higher hardness (H) and lower water contact angles. Moreover, our results indicated a strong correlation between the hardness of the films and the threshold for severe wear damage. This threshold can be expressed by the ratio between the average Hertzian contact stress and the hardness which, in this study, is close to unity.
C1 [Colaco, R.] Univ Tecn Lisboa, Inst Super Tecn, Dept Mat Engn, P-1049001 Lisbon, Portugal.
[Colaco, R.] Univ Tecn Lisboa, Inst Super Tecn, ICEMS, P-1049001 Lisbon, Portugal.
[Serro, A. P.] Inst Super Tecn, CQE, P-1049001 Lisbon, Portugal.
[Serro, A. P.] Inst Super Ciencias Saude Egas Moniz, P-2829511 Caparica, Portugal.
[Eryilmaz, O. L.; Erdemir, A.] Argonne Natl Lab, Div Energy Syst, Argonne, IL 60439 USA.
RP Colaco, R (reprint author), Univ Tecn Lisboa, Inst Super Tecn, Dept Mat Engn, Av Rovisco Pais, P-1049001 Lisbon, Portugal.
RI Colaco, Rogerio/B-5432-2013; Serro, Ana /H-7797-2012;
OI Colaco, Rogerio/0000-0001-7374-6741; Serro, Ana /0000-0002-6179-9296;
Colaco, Rogerio/0000-0002-5529-1621
FU Portuguese Foundation for Science and Technology [PTDC/CTM68142/2006];
US Department of Energy; Office of Energy Efficiency and Renewable
Energy; Freedom Car and Vehicle Technology Program [DE-AC02-06CH11357]
FX The authors would like to thank the Portuguese Foundation for Science
and Technology (FCT - Project Nanoffawn, PTDC/CTM68142/2006) and the US
Department of Energy, Office of Energy Efficiency and Renewable Energy,
Freedom Car and Vehicle Technology Program (Contract No
DE-AC02-06CH11357) for the financial support. The authors would also
like to thank the European Science Foundation (ESF) scientific program
'NATRIBO'.
NR 23
TC 9
Z9 9
U1 1
U2 13
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0022-3727
J9 J PHYS D APPL PHYS
JI J. Phys. D-Appl. Phys.
PD APR 21
PY 2009
VL 42
IS 8
AR 085307
DI 10.1088/0022-3727/42/8/085307
PG 8
WC Physics, Applied
SC Physics
GA 434AT
UT WOS:000265248300061
ER
PT J
AU Kucheyev, SO
Azarov, AY
Titov, AI
Karaseov, PA
Kuchumova, TM
AF Kucheyev, S. O.
Azarov, A. Yu
Titov, A. I.
Karaseov, P. A.
Kuchumova, T. M.
TI Energy spike effects in ion-bombarded GaN
SO JOURNAL OF PHYSICS D-APPLIED PHYSICS
LA English
DT Article
ID IMPLANTED GAN; DAMAGE BUILDUP; COLLISION CASCADES; GALLIUM NITRIDE;
HEAVY-IONS; TEMPERATURE; ACCUMULATION; AMORPHIZATION; IRRADIATION;
SILICON
AB We study structural disorder in GaN bombarded at room temperature with 1.3 keV amu(-1) PF(n) (n = 0, 2 and 4) cluster ions. Results are compared with our previous studies of irradiation with atomic ions of different masses. An algorithm for cascade density calculations that take into account the formation of subcascades is presented. Quantitative analysis of both new and previous data shows that an increase in the cascade density above a certain critical value results in a rapid increase in the rate of planar amorphization and the rate of damage buildup in the crystal bulk. Both such rates increase with decreasing sample temperature. This threshold-like behaviour suggests an important role of nonlinear energy spikes in the formation of stable implantation disorder in GaN. We also discuss the striking difference between cascade density effects in damage buildup in different semiconductors, including GaN, ZnO and Si.
C1 [Kucheyev, S. O.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Azarov, A. Yu; Titov, A. I.; Karaseov, P. A.; Kuchumova, T. M.] St Petersburg State Polytech Univ, Dept Phys Elect, St Petersburg 195251, Russia.
RP Kucheyev, SO (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM kucheyev@llnl.gov
RI Karaseov, Platon/P-6861-2015; Titov, Andrey/A-4608-2017
OI Karaseov, Platon/0000-0003-2511-0188; Titov, Andrey/0000-0003-4933-9534
FU RFFI [06-08-00989, 08-08-00585, 09-08-92657]; US DOE [DE-AC52-07NA27344]
FX The authors thank G Li for supplying GaN samples and A Gladkikh for help
with data analysis. Work in St Petersburg was supported by the RFFI
(grants 06-08-00989, 08-08-00585 and 09-08-92657). Work at LLNL was
performed under the auspices of the US DOE by LLNL under Contract
DE-AC52-07NA27344.
NR 34
TC 18
Z9 18
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0022-3727
J9 J PHYS D APPL PHYS
JI J. Phys. D-Appl. Phys.
PD APR 21
PY 2009
VL 42
IS 8
AR 085309
DI 10.1088/0022-3727/42/8/085309
PG 10
WC Physics, Applied
SC Physics
GA 434AT
UT WOS:000265248300063
ER
PT J
AU Lorenz, CD
Lane, JMD
Chandross, M
Stevens, MJ
Grest, GS
AF Lorenz, Christian D.
Lane, J. Matthew D.
Chandross, Michael
Stevens, Mark J.
Grest, Gary S.
TI Molecular Dynamics Simulations of Water Confined between Matched Pairs
of Hydrophobic and Hydrophilic Self-Assembled Monolayers
SO LANGMUIR
LA English
DT Article
ID PHASE-TRANSITIONS; LIQUID WATER; FORCE-FIELD; THIN-LAYERS; SURFACES;
FILMS; MEMS; NANOTRIBOLOGY; SILICA; INTERFACE
AB We have conducted a molecular dynamics (MD) simulation study of water confined between methyl-terminated and carboxyl-terminated alkylsilane self-assembled monolayers (SAMs) on amorphous silica substrates. In doing so, we have investigated the dynamic and structural behavior of the water molecules when compressed to loads ranging from 20 to 950 MPa for two different amounts of water (27 and 58 water molecules/nm(2)). Within the studied range of loads, we observe that no water molecules penetrate the hydrophobic region of the carboxyl-terminated SAMs. However, we observe that at loads larger than 150 MPa water molecules penetrate the methyl-terminated SAMs and form hydrogen-bonded chains that connect to the bulk water. The diffusion coefficient of the water molecules decreases as the water film becomes thinner and pressure increases. When compared to bulk diffusion coefficients of water molecules at the various loads, we found that the diffusion coefficients for the systems with 27 water molecules/nm(2) are reduced by a factor of 20 at low loads and by a factor of 40 at high loads, while the diffusion coefficients for the systems with 58 water molecules/nm(2) are reduced by a factor of 25 at all loads.
C1 [Lorenz, Christian D.] Kings Coll London, Dept Mech Engn, Mat Res Grp, London WC2R 2LS, England.
[Lane, J. Matthew D.; Chandross, Michael; Stevens, Mark J.; Grest, Gary S.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Lorenz, CD (reprint author), Kings Coll London, Dept Mech Engn, Mat Res Grp, London WC2R 2LS, England.
EM chris.lorenz@kcl.ac.uk
RI Lorenz, Christian/A-6996-2017
OI Lorenz, Christian/0000-0003-1028-4804
FU KCL Division of Engineering; United States Department of Energy
[DE-AC04-94AL85000.]
FX C.L. acknowledges the KCL Division of Engineering Start-Up funds for
supporting this project. C.L. also acknowledges the computer resources,
technical expertise and assistance provided by the Barcelona
Super-computing center - Centro Nacional de Supercomputacion, which was
used for some of the simulations. Sandia is a multiprogram laboratory
operated by Sandia Corporation, a Lockheed Martin Company, for the
United States Department of Energy under Contract DE-AC04-94AL85000.
NR 41
TC 12
Z9 13
U1 1
U2 30
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD APR 21
PY 2009
VL 25
IS 8
BP 4535
EP 4542
DI 10.1021/la803940b
PG 8
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 434NP
UT WOS:000265281700051
PM 19278251
ER
PT J
AU Tan, CY
AF Tan, C. Y.
TI Chromaticity tracking with a phase modulation/demodulation technique in
the Tevatron
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE Tevatron; Chromaticity tracker; Chromaticity tracking; Tune tracker PLL;
Phase modulation; Phase demodulation
AB The Tevatron chromaticity tracker (CT) has been successfully commissioned and is now operational. The basic idea behind the CT is that when the phase of the Tevatron RE is slowly modulated, the beam momentum is also modulated. This momentum modulation is coupled transversely via chromaticity to manifest as a phase modulation on the betatron tune. And so by phase demodulating the betatron tune, the chromaticity can be recovered. However, for the phase demodulation to be successful, it is critical that the betatron tune be a coherent signal that can be easily picked up by a phase detector. This is easily done because the Tevatron has a phase locked loop based tune tracker which coherently excites the beam at the betatron tune. (C) 2009 Elsevier B.V. All rights reserved.
C1 Fermilab Natl Accelerator Lab, Accelerator Div Tevatron, Batavia, IL 60510 USA.
RP Tan, CY (reprint author), Fermilab Natl Accelerator Lab, Accelerator Div Tevatron, MS 341,POB 500, Batavia, IL 60510 USA.
EM cytan@fnal.gov
NR 6
TC 2
Z9 2
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD APR 21
PY 2009
VL 602
IS 2
BP 352
EP 356
DI 10.1016/j.nima.2009.01.132
PG 5
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 441ZW
UT WOS:000265810200009
ER
PT J
AU Gros, S
Hammond, NJ
Lister, CJ
Chowdhury, P
Fischer, SM
Freeman, SJ
AF Gros, S.
Hammond, N. J.
Lister, C. J.
Chowdhury, P.
Fischer, S. M.
Freeman, S. J.
TI Performance tests of large area position-sensitive planar germanium
detectors with conventional and amorphous contacts
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE Position sensitive germanium detectors
ID SIDED STRIP DETECTOR; GE DETECTORS; GREAT SPECTROMETER; HPGE;
SPECTROSCOPY; RESOLUTION; TELESCOPE; SMARTPET; SIMULATIONS
AB Large area position-sensitive planar germanium wafers are increasingly being used for a variety of gamma-ray imaging and tracking tasks. Position sensitivity can be achieved through measuring charge collected on orthogonal strip electrodes, and by digital pulse shape analysis. However, the development of this detector technology has been slow, and criteria to measure improved performance have not been well established. We have studied 93 and 88 mill square segmented detectors of 20 mm thickness made with conventional boron and lithium electrodes, and two 100 mm circular segmented detectors of 14 mm thickness with amorphous germanium contacts. We have compared these detectors with a planar detector of 15 mm thickness. Conventional energy resolution tests of individual strips are insufficient to fully categorize the performance of the position sensitive detectors. We propose some basic tests which can rapidly quantify any segmented detector characteristics, and show potential inadequacies which become important when imaging or tracking is attempted. Published by Elsevier B.V.
C1 [Gros, S.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Phys, Berkeley, CA 94720 USA.
[Gros, S.; Hammond, N. J.; Lister, C. J.; Fischer, S. M.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
[Chowdhury, P.] Univ Massachusetts Lowell, Dept Phys, Lowell, MA 01854 USA.
[Fischer, S. M.] Depaul Univ, Dept Phys, Chicago, IL 60614 USA.
[Freeman, S. J.] Univ Manchester, Schuster Lab, Manchester M13 9PL, Lancs, England.
RP Gros, S (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Phys, Berkeley, CA 94720 USA.
EM sgros@lbl.gov
RI Freeman, Sean/B-1280-2010;
OI Freeman, Sean/0000-0001-9773-4921; Hammond, Neil/0000-0001-6390-8874
FU US Department of Energy, Office of Nuclear Physics [DE-AC02-06-CH11357]
FX We would like to thank Pat Sangsingkeow from AMETEK-ORTEC, Ethan Hull
and Dick Pehl from PhD's Inc., and Bernard Phlips and Dick Kroeger from
the Naval Research Laboratories for many enlightening discussions on
detector properties and performance, and suggestions for system
improvements. This research was supported by the US Department of
Energy, Office of Nuclear Physics, under contract DE-AC02-06-CH11357.
NR 41
TC 8
Z9 8
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD APR 21
PY 2009
VL 602
IS 2
BP 467
EP 476
DI 10.1016/j.nima.2008.12.194
PG 10
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 441ZW
UT WOS:000265810200026
ER
PT J
AU Gavron, A
Smith, LE
Ressler, JJ
AF Gavron, A.
Smith, L. Eric
Ressler, Jennifer J.
TI Analysis of spent fuel assemblies using a lead slowing down spectrometer
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE Spent fuel measurement; Non-destructive assay
ID ASSAY
AB We analyze the potential of using Lead Slowing Down Spectrometer technology for assaying spent fuel. This initial Study demonstrates that it may be feasible to design a system that will provide approximately 1% statistical precision in the determination of the (239)Pu concentration in a pressurized water reactor spent-fuel assembly, for intermediate-to-high burnup levels, using commercial neutron Sources, and an array of ultra-high-purity (238)U threshold fission detectors. LSDS technology can also determine the concentration of (241)Pu and (235)U. There is indication that missing pins can be detected, as can asymmetry in the fuel bundle. The analytical model used to perform the viability assessment is described, as are the systematic effects that were not incorporated in this analysis, but could significantly degrade actual performance. These results provide the justification and impetus for the initiation of followup studies that will incorporate the complete Suite of effects that impact the accuracy of LSDS measurements. (C) 2009 Elsevier B.V. All rights reserved,
C1 [Gavron, A.] Los Alamos Natl Lab, Los Alamos Neutron Sci Ctr, Los Alamos, NM 87545 USA.
[Smith, L. Eric; Ressler, Jennifer J.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Gavron, A (reprint author), Los Alamos Natl Lab, Los Alamos Neutron Sci Ctr, Mail Stop H-845, Los Alamos, NM 87545 USA.
EM gavron@lanl.gov
RI Ressler, Jennifer Jo/F-2279-2010
NR 15
TC 5
Z9 5
U1 1
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD APR 21
PY 2009
VL 602
IS 2
BP 581
EP 587
DI 10.1016/j.nima.2009.01.017
PG 7
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 441ZW
UT WOS:000265810200042
ER
PT J
AU Menlove, HO
Menlove, SH
Tobin, SJ
AF Menlove, H. O.
Menlove, S. H.
Tobin, S. J.
TI Fissile and fertile nuclear material measurements using a new
differential die-away self-interrogation technique
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE Spent fuel measurement; Plutonium assay; Differential die-away; Nuclear
safeguard; Neutron detector
AB This paper presents a new technique for the measurement of fissile and fertile nuclear materials in spent fuel and plutonium-laden materials such as mixed oxide (MOX) fuel. The technique, called differential die-away self-interrogation, is similar to traditional differential die-away analysis, but it does not require a pulsed neutron generator or pulsed beam accelerator, and it can measure the fertile mass in addition to the fissile mass. The new method uses the spontaneous fission neutrons from (244)Cm in spent fuel and (240)Pu effective neutrons in MOX as the "pulsed" neutron source, with an average of similar to 2.7 neutrons per pulse. The time-correlated neutrons from the spontaneous fission and the subsequent induced fissions are analyzed as a function of time to determine the spontaneous fission rate, the induced fast-neutron fissions, and the induced thermal-neutron fissions. The fissile mass is determined from the induced thermal-neutron fissions that are produced by reflected thermal neutrons that originated from the spontaneous fission reaction. The sensitivity of the fissile mass measurement is enhanced by the use of two measurements, with and without a cadmium liner between the sample and a hydrogenous moderator that surrounds the sample. The fertile mass is determined from the multiplicity analysis of the neutrons detected soon after the initial triggering neutron is detected. The method obtains good sensitivity by the optimal design of two different neutron die-away regions: a short die-away for the neutron detector region and a longer die-away for the sample interrogation region. Published by Elsevier B.V.
C1 [Menlove, H. O.; Tobin, S. J.] Los Alamos Natl Lab, Nucl Nonproliferat Div, Los Alamos, NM 87545 USA.
[Menlove, S. H.] STS, Los Alamos, NM 87544 USA.
RP Menlove, HO (reprint author), Los Alamos Natl Lab, Nucl Nonproliferat Div, POB 1663, Los Alamos, NM 87545 USA.
EM hmenlove@lanl.gov
FU Department of Energy's Office of Nuclear Energy; National Nuclear
Security Administration's Office of Nonproliferation and International
Security
FX The authors would like to acknowledge support from the Department of
Energy's Office of Nuclear Energy and the National Nuclear Security
Administration's Office of Nonproliferation and International Security.
NR 10
TC 11
Z9 11
U1 0
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD APR 21
PY 2009
VL 602
IS 2
BP 588
EP 593
DI 10.1016/j.nima.2009.01.157
PG 6
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 441ZW
UT WOS:000265810200043
ER
PT J
AU Kim, H
Kao, CM
Xie, Q
Chen, CT
Zhou, L
Tang, F
Frisch, H
Moses, WW
Choong, WS
AF Kim, H.
Kao, C. M.
Xie, Q.
Chen, C. T.
Zhou, L.
Tang, F.
Frisch, H.
Moses, W. W.
Choong, W. S.
TI A multi-threshold sampling method for TOF-PET signal processing
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE Positron emission tomography; Multi-threshold sampling; Time resolution
ID SCINTILLATION PULSES; DETECTORS
AB As an approach to realizing all-digital data acquisition for positron emission tomography (PET), we have previously proposed and studied a multi-threshold sampling method to generate samples of a PET event waveform with respect to a few user-defined amplitudes. In this sampling scheme, one can extract both the energy and timing information for an event. In this paper, we report our prototype implementation of this sampling method and the performance results obtained with this prototype. The prototype consists of two Multi-threshold discriminator boards and a time-to-digital converter (TDC) board. Each of the multi-threshold discriminator boards takes one input and provides up to eight threshold levels, which can be defined by users, for sampling the input signal. The TDC board employs the CERN HPTDC chip that determines the digitized times of the leading and failing edges of the discriminator output pulses. We connect our prototype electronics to the outputs of two Hamamatsu R9800 photomultiplier tubes (PMTs) that are individually coupled to a 6.25 x 6.25 x 25 mm(3) LSO crystal. By analyzing waveform samples generated by using four thresholds, we obtain a coincidence timing resolution of about 340 ps and an similar to 18% energy resolution at 511 keV. We are also able to estimate the decay-time constant from the resulting samples and obtain a mean value of 44 ns with an similar to 9 ns FWHM. In comparison, using digitized waveforms obtained at a 20 GSps sampling rate for the same LSO/PMT modules we obtain similar to 300 ps coincidence timing resolution, similar to 14% energy resolution at 511 keV, and similar to 5 ns FWHM for the estimated decay-time constant. Details of the results on the timing and energy resolutions by using the multi-threshold method indicate that it is a promising approach for implementing digital PET data acquisition. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Kim, H.; Kao, C. M.; Xie, Q.; Chen, C. T.] Univ Chicago, Dept Radiol, Chicago, IL 60637 USA.
[Zhou, L.; Tang, F.; Frisch, H.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
[Moses, W. W.; Choong, W. S.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Kim, H (reprint author), Univ Chicago, Dept Radiol, Chicago, IL 60637 USA.
EM heejongkim@uchicago.edu
FU NIBIB NIH HHS [R01 EB006085-02, R01 EB006085-01A2, R01 EB006085-04, T32
EB002103-18, R01 EB006085, R01 EB006085-03, T32 EB002103]
NR 10
TC 30
Z9 30
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD APR 21
PY 2009
VL 602
IS 2
BP 618
EP 621
DI 10.1016/j.nima.2009.01.100
PG 4
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 441ZW
UT WOS:000265810200049
PM 19690623
ER
PT J
AU Huang, W
Wang, LS
AF Huang, Wei
Wang, Lai-Sheng
TI Au-10(-): isomerism and structure-dependent O-2 reactivity
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID GOLD CLUSTERS; PHOTOELECTRON-SPECTROSCOPY; METAL-CLUSTERS; ANIONS;
OXYGEN; OXIDATION; CAGES
AB Structure isomers of the Au-10 cluster and their chemical reactivity with O-2 are studied using photoelectron spectroscopy under different experimental conditions. In addition to the global minimum triangular D-3h structure, at least three low-lying isomers (X', X '', and X''') are observed distinctly using argon tagging and O-2 titration. The D-3h structure has a very high electron affinity of 3.88 V, whereas the low-lying, isomers have lower electron affinities (2.86, 3.09, and 3.45 eV for X', X '', X''', respectively). It is found that the D-3h global minimum does not react with O2 and can only form a physisorbed Au-10(O-2)(-) van der Waals complex under cold experimental conditions. The three low-lying isomers are reactive with O-2 and can be systematically titrated out of the cluster beam using an O-2-seeded carrier gas, leaving a clean D-3h Au-10(-) beam.
C1 [Huang, Wei; Wang, Lai-Sheng] Washington State Univ, Dept Phys, Richland, WA 99354 USA.
[Huang, Wei; Wang, Lai-Sheng] Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA.
RP Wang, LS (reprint author), Washington State Univ, Dept Phys, 2710 Univ Dr, Richland, WA 99354 USA.
EM ls.wang@pnl.gov
FU National Science Foundation [CHE-0749496]
FX This work was supported by the National Science Foundation (CHE-0749496)
and performed at the W.R Wiley Environment Molecular Sciences
Laboratory, a national scientific user facility sponsored by DOEs Office
of Biological and Environmental Research and located at Pacific
Northwest National Laboratory, operated for DOE by Battelle.
NR 22
TC 39
Z9 39
U1 0
U2 13
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1463-9076
J9 PHYS CHEM CHEM PHYS
JI Phys. Chem. Chem. Phys.
PD APR 21
PY 2009
VL 11
IS 15
BP 2663
EP 2667
DI 10.1039/b823159a
PG 5
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 442IY
UT WOS:000265836100011
PM 19421523
ER
PT J
AU Bischofs, IB
Hug, JA
Liu, AW
Wolf, DM
Arkin, AP
AF Bischofs, Ilka B.
Hug, Joshua A.
Liu, Aiwen W.
Wolf, Denise M.
Arkin, Adam P.
TI Complexity in bacterial cell-cell communication: Quorum signal
integration and subpopulation signaling in the Bacillus subtilis
phosphorelay
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE heterogeneity; Phr; quorum sensing; sporulation; model
ID PROTEIN ASPARTATE PHOSPHATASES; SPORULATION GENE-EXPRESSION; SIGMA-H;
CIRCUIT; PHR; BISTABILITY; INITIATION; PATHWAYS; SYSTEM; SPO0A
AB A common form of quorum sensing in Gram-positive bacteria is mediated by peptides that act as phosphatase regulators (Phr) of receptor aspartyl phosphatases (Raps). In Bacillus subtilis, several Phr signals are integrated in sporulation phosphorelay signal transduction. We theoretically demonstrate that the phosphorelay can act as a computational machine performing a sensitive division operation of kinase-encoded signals by quorum-modulated Rap signals, indicative of cells computing a "food per cell'' estimate to decide whether to enter sporulation. We predict expression from the rapA-phrA operon to bifurcate as relative environmental signals change in a developing population. We experimentally observe that the rapA-phrA operon is heterogeneously induced in sporulating microcolonies. Uninduced cells sporulate rather synchronously early on, whereas the RapA/PhrA subpopulation sporulates less synchronously throughout later stationary phase. Moreover, we show that cells sustain PhrA expression during periods of active growth. Together with the model, these findings suggest that the phosphorelay may normalize environmental signals by the size of the (sub) population actively competing for nutrients (as signaled by PhrA). Generalizing this concept, the various Phrs could facilitate subpopulation communication in dense isogenic communities to control the physiological strategies followed by differentiated subpopulations by interpreting (environmental) signals based on the spatiotemporal community structure.
C1 [Bischofs, Ilka B.; Wolf, Denise M.; Arkin, Adam P.] Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
[Bischofs, Ilka B.; Liu, Aiwen W.; Arkin, Adam P.] Univ Calif Berkeley, Dept Bioengn, Berkeley, CA 94704 USA.
[Hug, Joshua A.] Univ Calif Berkeley, Dept Elect Engn, Berkeley, CA 94704 USA.
RP Bischofs, IB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, 1 Cyclotron Rd,MS Calvin, Berkeley, CA 94720 USA.
EM ibbischofs@lbl.gov; aparkin@lbl.gov
RI Arkin, Adam/A-6751-2008
OI Arkin, Adam/0000-0002-4999-2931
FU National Institutes of Health [R01 GM073010-01]; Deutsche
Forschungsgemeinschaft [BI1213-1]
FX We thank D. Lee, Eric Battenberg, and H. Patel for help with image
processing; O. Kuipers and G. Price (University of California, Berkeley,
CA) for providing strains; G. Price, R. Munch, B. Lazazzera, and A.
Grossman for discussions; and A. Deutschbauer, R. Skupsky, and S. Aviran
for critical reading of the manuscript. This work was supported by
National Institutes of Health Grant R01 GM073010-01 and by the Deutsche
Forschungsgemeinschaft through fellowship BI1213-1 (to I. B. B.).
NR 33
TC 56
Z9 57
U1 1
U2 20
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD APR 21
PY 2009
VL 106
IS 16
BP 6459
EP 6464
DI 10.1073/pnas.0810878106
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 437SI
UT WOS:000265506800009
PM 19380751
ER
PT J
AU Shvartsburg, AA
Noskov, SY
Purves, RW
Smith, RD
AF Shvartsburg, Alexandre A.
Noskov, Sergei Y.
Purves, Randy W.
Smith, Richard D.
TI Pendular proteins in gases and new avenues for characterization of
macromolecules by ion mobility spectrometry
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE mass spectrometry; protein structure
ID IONIZATION MASS-SPECTROMETRY; ELECTROSPRAY-IONIZATION; CYTOCHROME-C;
UBIQUITIN CONFORMERS; ELECTRIC-FIELDS; PHASE; SEPARATION; CONFORMATIONS;
MS; CHROMATOGRAPHY
AB Polar molecules align in electric fields when the dipole energy (proportional to field intensity E x dipole moment p) exceeds the thermal rotational energy. Small molecules have low p and align only at inordinately high E or upon extreme cooling. Many biomacromolecules and ions are strong permanent dipoles that align at E achievable in gases and room temperature. The collision cross-sections of aligned ions with gas molecules generally differ from orientationally averaged quantities, affecting ion mobilities measured in ion mobility spectrometry (IMS). Field asymmetric waveform IMS (FAIMS) separates ions by the difference between mobilities at high and low E and hence can resolve and identify macroion conformers based on the mobility difference between pendular and free rotor states. The exceptional sensitivity of that difference to ion geometry and charge distribution holds the potential for a powerful method for separation and characterization of macromolecular species. Theory predicts that the pendular alignment of ions in gases at any E requires a minimum p that depends on the ion mobility, gas pressure, and temperature. At ambient conditions used in current FAIMS systems, p for realistic ions must exceed approximate to 300-400 Debye. The dipole moments of proteins statistically increase with increasing mass, and such values are typical above approximate to 30 kDa. As expected for the dipole-aligned regime, FAIMS analyses of protein ions and complexes of approximate to 30-130 kDa show an order-of-magnitude expansion of separation space compared with smaller proteins and other ions.
C1 [Shvartsburg, Alexandre A.; Smith, Richard D.] Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA.
[Purves, Randy W.] Thermo Fisher Sci, San Jose, CA 95134 USA.
[Noskov, Sergei Y.] Univ Calgary, Dept Biol Sci, Calgary, AB T2N 1N4, Canada.
[Noskov, Sergei Y.] Univ Calgary, Inst Biocomplex & Informat, Calgary, AB T2N 1N4, Canada.
RP Shvartsburg, AA (reprint author), Pacific NW Natl Lab, Div Biol Sci, POB 999, Richland, WA 99352 USA.
EM alexandre.shvartsburg@pnl.gov
RI Noskov, Sergei/B-3654-2010; Smith, Richard/J-3664-2012;
OI Smith, Richard/0000-0002-2381-2349; Purves, Randy/0000-0002-1274-837X
FU National Institutes of Health; Natural Sciences and Engineering Research
Council (Canada); Alberta Heritage Foundation for Medical Research
FX We thank Dr. Tadeusz Bryskiewicz for help with data collection, Drs.
Keqi Tang and Stephen L. Coy for discussions of pendular alignment of
ions in FAIMS, and Jose D. Faraldo-Gomez for help with REMD algorithm.
This work was supported by the National Institutes of Health, the
Natural Sciences and Engineering Research Council (Canada), and the
Alberta Heritage Foundation for Medical Research.
NR 49
TC 20
Z9 21
U1 0
U2 19
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD APR 21
PY 2009
VL 106
IS 16
BP 6495
EP 6500
DI 10.1073/pnas.0812318106
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 437SI
UT WOS:000265506800015
PM 19351899
ER
PT J
AU Numano, R
Szobota, S
Lau, AY
Gorostiza, P
Volgraf, M
Roux, B
Trauner, D
Isacoff, EY
AF Numano, Rika
Szobota, Stephanie
Lau, Albert Y.
Gorostiza, Pau
Volgraf, Matthew
Roux, Benoit
Trauner, Dirk
Isacoff, Ehud Y.
TI Nanosculpting reversed wavelength sensitivity into a photoswitchable
iGluR
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE glutamate receptor; ion channel; optics; photoswitch
ID IONOTROPIC GLUTAMATE RECEPTORS; ION CHANNELS; ACETYLCHOLINE-RECEPTOR;
OPTICAL SWITCHES; BOUND AGONISTS; REMOTE-CONTROL; K+ CHANNEL;
SELECTIVITY; ACTIVATION; MECHANISMS
AB Photoswitched tethered ligands (PTLs) can be used to remotely control protein function with light. We have studied the geometric and conformational factors that determine the efficacy of PTL gating in the ionotropic glutamate receptor iGluR6 using a family of photoiosomerizable MAG (maleimide-azobenzene-glutamate) PTLs that covalently attach to the clamshell ligand-binding domain. Experiments and molecular dynamics simulations of the modified proteins show that optical switching depends on 2 factors: (i) the relative occupancy of the binding pocket in the 2 photoisomers of MAG and (ii) the degree of clamshell closure that is possible given the disposition of the MAG linker. A synthesized short version of MAG turns the channel on in either the cis or trans state, depending on the point of attachment. This yin/yang optical control makes it possible for 1 wavelength of light to elicit action potentials in one set of neurons, while deexciting a second set of neurons in the same preparation, whereas a second wavelength has the opposite effect. The ability to generate opposite responses with a single PTL and 2 versions of a target channel, which can be expressed in different cell types, paves the way for engineering opponency in neurons that mediate opposing functions.
C1 [Numano, Rika; Szobota, Stephanie; Gorostiza, Pau; Isacoff, Ehud Y.] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
[Volgraf, Matthew; Trauner, Dirk] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Szobota, Stephanie] Univ Calif Berkeley, Biophys Grad Program, Berkeley, CA 94720 USA.
[Numano, Rika] Univ Tokyo, Lab Anim Res Ctr, Inst Med Sci, Minato Ku, Tokyo 1088639, Japan.
[Lau, Albert Y.; Roux, Benoit] Univ Chicago, Dept Biochem & Mol Biol, Chicago, IL 60637 USA.
[Isacoff, Ehud Y.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat, Berkeley, CA 94720 USA.
[Isacoff, Ehud Y.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Phys Biosci, Berkeley, CA 94720 USA.
RP Trauner, D (reprint author), Univ Munich, Dept Chem & Biochem, D-81377 Munich, Germany.
EM dirk.trauner@cup.uni-muenchen.de; ehud@berkeley.edu
RI Gorostiza, Pau/Q-2544-2015
OI Gorostiza, Pau/0000-0002-7268-5577
FU Human Frontiers Science Program [RGP23-2005]; National Institutes of
Health (NIH) Nanomedicine Development Center [PN2 EY018241]; Japan
Society for the Promotion of Science; Institute of Tokyo Vascular
Disease; Generalitat de Catalunya (Nanotechnology Program); Ministerio
de Educacion y Ciencia (Spain); Human Frontiers Science Program;
Novartis and Roche Biosciences; NIH [GM-62342]
FX We thank K. M. Partin for the iGluR6 cDNA, T. Machen for guidance on
calcium imaging, and Harald Janovjak for helpful discussion. This work
was supported by Human Frontiers Science Program Grant RGP23-2005 and
National Institutes of Health (NIH) Nanomedicine Development Center for
the Optical Control of Biological Function Grant PN2 EY018241 as well as
postdoctoral fellowships from the Japan Society for the Promotion of
Science and the Institute of Tokyo Vascular Disease (to R.N.) and the
Generalitat de Catalunya (Nanotechnology Program), Ministerio de
Educacion y Ciencia (Spain) and the Human Frontiers Science Program (to
P. G.). D. T. thanks Novartis and Roche Biosciences for support. A.Y.L
and B. R were supported by NIH Grant GM-62342.
NR 26
TC 55
Z9 55
U1 0
U2 7
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD APR 21
PY 2009
VL 106
IS 16
BP 6814
EP 6819
DI 10.1073/pnas.0811899106
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 437SI
UT WOS:000265506800070
PM 19342491
ER
PT J
AU Bidkar, RA
Tung, RC
Alexeenko, AA
Sumali, H
Raman, A
AF Bidkar, Rahul A.
Tung, Ryan C.
Alexeenko, Alina A.
Sumali, Hartono
Raman, Arvind
TI Unified theory of gas damping of flexible microcantilevers at low
ambient pressures
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE Boltzmann equation; cantilevers; damping; elemental semiconductors;
Knudsen flow; microfluidics; microsensors; silicon; slip flow
ID DEPENDENCE
AB Predicting the gas damping of microcantilevers oscillating in different vibration modes in unbounded gas at low pressures is relevant for increasing the sensitivity of microcantilever-based sensors. While existing free-molecular theories are valid only at very high Knudsen numbers, continuum models are valid only at very low Knudsen numbers. We solve the quasisteady Boltzmann equation and compute a closed-form fit for gas damping of rectangular microcantilevers that is valid over four orders of magnitude of Knudsen numbers spanning the free-molecular, the transition, and the low pressure slip flow regimes. Experiments are performed using silicon microcantilevers under controlled pressures to validate the theory.
C1 [Bidkar, Rahul A.; Tung, Ryan C.; Raman, Arvind] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA.
[Bidkar, Rahul A.; Tung, Ryan C.; Raman, Arvind] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA.
[Alexeenko, Alina A.] Purdue Univ, Sch Aeronaut & Astronaut, W Lafayette, IN 47907 USA.
[Sumali, Hartono] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Bidkar, RA (reprint author), Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA.
EM raman@ecn.purdue.edu
RI Alexeenko, Alina/B-7168-2011
FU Department of Energy [National Nuclear Security Administration]
[DE-FC52-08NA28617, DE-AC04-94-AL85000]; SNL [623235]
FX This material is based upon work supported by the Department of Energy
[National Nuclear Security Administration] under Award No.
DE-FC52-08NA28617 and by the SNL under Contract No. 623235. Part of this
work was conducted at SNL, which is a multiprogram laboratory operated
under Sandia Corporation, a Lockheed Martin Co., for the United States
DoE under Contract No. DE-AC04-94-AL85000. We also thank Prof. J. Murthy
(Purdue) for insightful discussions on the topic.
NR 13
TC 20
Z9 20
U1 1
U2 10
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 20
PY 2009
VL 94
IS 16
AR 163117
DI 10.1063/1.3122933
PG 3
WC Physics, Applied
SC Physics
GA 442ER
UT WOS:000265823300072
ER
PT J
AU Peralta, XG
Wanke, MC
Arrington, CL
Williams, JD
Brener, I
Strikwerda, A
Averitt, RD
Padilla, WJ
Smirnova, E
Taylor, AJ
O'Hara, JF
AF Peralta, X. G.
Wanke, M. C.
Arrington, C. L.
Williams, J. D.
Brener, I.
Strikwerda, A.
Averitt, R. D.
Padilla, W. J.
Smirnova, E.
Taylor, A. J.
O'Hara, J. F.
TI Large-area metamaterials on thin membranes for multilayer and curved
applications at terahertz and higher frequencies
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE Fourier transform spectra; infrared spectra; membranes; metamaterials;
microwave materials; Q-factor; silicon compounds
ID OPTICAL FREQUENCIES; INDEX
AB A possible path for fabricating three-dimensional metamaterials with curved geometries at optical and infrared frequencies is to stack flexible metamaterial layers. We have fabricated highly uniform metamaterials at terahertz frequencies on large-area, low-stress, free-standing 1 mu m thick silicon nitride membranes. Their response remains comparable to that of similar structures on thick substrates as measured by the quality factor of the resonances. Transmission measurements with a Fourier transform infrared spectrometer highlight the advantage of fabricating high frequency metamaterials on thin membranes as etalon effects are eliminated. Releasing the membranes enables layering schemes and placement onto curved surfaces in order to create three-dimensional structures.
C1 [Peralta, X. G.; Wanke, M. C.; Arrington, C. L.; Williams, J. D.; Brener, I.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Strikwerda, A.; Averitt, R. D.] Boston Univ, Dept Phys, Boston, MA 02215 USA.
[Padilla, W. J.] Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA.
[Smirnova, E.; Taylor, A. J.; O'Hara, J. F.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Peralta, XG (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM xomalin.peralta@utsa.edu
RI Brener, Igal/G-1070-2010; Padilla, Willie/A-7235-2008; Peralta,
Xomalin/F-3710-2014;
OI Brener, Igal/0000-0002-2139-5182; Padilla, Willie/0000-0001-7734-8847;
Peralta, Xomalin/0000-0002-4034-3214; Simakov,
Evgenya/0000-0002-7483-1152
FU CINT and the IC Postdoctoral Research Fellowship Program; U.S. DOE's
NNSA [DE-AC04-94AL85000, DE-AC52-06NA25396]
FX We acknowledge support from the CINT and the IC Postdoctoral Research
Fellowship Program (X.G.P.). Sandia is a multiprogram laboratory
operated by Sandia Corporation, a Lockheed Martin Co., for the U.S.
DOE's NNSA under Contract No. DE-AC04-94AL85000. Los Alamos National
Laboratory, an affirmative action/equal opportunity employer, is
operated by Los Alamos National Security, LLC, for the NNSA of the U.S.
DOE under Contract No. DE-AC52-06NA25396.
NR 20
TC 27
Z9 27
U1 0
U2 21
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 20
PY 2009
VL 94
IS 16
AR 161113
DI 10.1063/1.3114416
PG 3
WC Physics, Applied
SC Physics
GA 442ER
UT WOS:000265823300013
ER
PT J
AU Ramirez, MO
Kumar, A
Denev, SA
Chu, YH
Seidel, J
Martin, LW
Yang, SY
Rai, RC
Xue, XS
Ihlefeld, JF
Podraza, NJ
Saiz, E
Lee, S
Klug, J
Cheong, SW
Bedzyk, MJ
Auciello, O
Schlom, DG
Orenstein, J
Ramesh, R
Musfeldt, JL
Litvinchuk, AP
Gopalan, V
AF Ramirez, M. O.
Kumar, A.
Denev, S. A.
Chu, Y. H.
Seidel, J.
Martin, L. W.
Yang, S. -Y.
Rai, R. C.
Xue, X. S.
Ihlefeld, J. F.
Podraza, N. J.
Saiz, E.
Lee, S.
Klug, J.
Cheong, S. W.
Bedzyk, M. J.
Auciello, O.
Schlom, D. G.
Orenstein, J.
Ramesh, R.
Musfeldt, J. L.
Litvinchuk, A. P.
Gopalan, V.
TI Spin-charge-lattice coupling through resonant multimagnon excitations in
multiferroic BiFeO3
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE bismuth compounds; ferroelectric materials; ferroelectric transitions;
magnons; multiferroics; Neel temperature; phonon-magnon interactions;
phonons; Raman spectra
ID TEMPERATURE; FILMS
AB Spin-charge-lattice coupling mediated by multimagnon processes is demonstrated in multiferroic BiFeO3. Experimental evidence of two- and three-magnon excitations as well as multimagnon coupling at electronic energy scales and high temperatures are reported. Temperature dependent Raman experiments show up to five resonant enhancements of the two-magnon excitation below the Neel temperature. These are shown to be collective interactions between on-site Fe d-d electronic resonance, phonons, and multimagnons.
C1 [Ramirez, M. O.; Kumar, A.; Denev, S. A.; Ihlefeld, J. F.; Podraza, N. J.; Schlom, D. G.; Gopalan, V.] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA.
[Ramirez, M. O.; Kumar, A.; Denev, S. A.; Ihlefeld, J. F.; Podraza, N. J.; Schlom, D. G.; Gopalan, V.] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA.
[Chu, Y. H.; Seidel, J.; Martin, L. W.; Yang, S. -Y.; Ihlefeld, J. F.; Saiz, E.; Ramesh, R.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Chu, Y. H.; Seidel, J.; Orenstein, J.; Ramesh, R.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Rai, R. C.; Xue, X. S.; Musfeldt, J. L.] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
[Lee, S.; Cheong, S. W.] State Univ New Jersey, Dept Phys, Piscataway, NJ 08854 USA.
[Lee, S.; Cheong, S. W.] State Univ New Jersey, Astron Rutgers Ctr Emergent Mat, Piscataway, NJ 08854 USA.
[Klug, J.; Bedzyk, M. J.] Northwestern Univ, Mat Res Ctr, Evanston, IL 60208 USA.
[Klug, J.; Bedzyk, M. J.; Auciello, O.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Litvinchuk, A. P.] Univ Houston, Dept Phys, Houston, TX 77204 USA.
[Litvinchuk, A. P.] Univ Houston, Texas Ctr Superconduct & Adv Mat, Houston, TX 77204 USA.
RP Ramirez, MO (reprint author), Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA.
EM mariola.ramirez@uam.es
RI Xu, Xiaoshan/B-1255-2009; Ihlefeld, Jon/B-3117-2009; Bedzyk,
Michael/B-7503-2009; Ying-Hao, Chu/A-4204-2008; Martin,
Lane/H-2409-2011; Klug, Jeffrey/A-3653-2013; Litvinchuk,
Alexander/K-6991-2012; Kumar, Amit/C-9662-2012; Schlom,
Darrell/J-2412-2013; Bedzyk, Michael/K-6903-2013; Orenstein,
Joseph/I-3451-2015; Ramirez, Maria de la O/I-3439-2016
OI Rai, Ram/0000-0003-2475-2488; Xu, Xiaoshan/0000-0002-4363-392X;
Ying-Hao, Chu/0000-0002-3435-9084; Martin, Lane/0000-0003-1889-2513;
Litvinchuk, Alexander/0000-0002-5128-5232; Kumar,
Amit/0000-0002-1194-5531; Schlom, Darrell/0000-0003-2493-6113; Ramirez,
Maria de la O/0000-0002-1233-1769
FU National Science Foundation [DMR-0512165, DMR-0507146, DMR-0820404,
DMR-0602986, DMR-0520513, DMR-0213623, DMR-0520471]; U.S. Department of
Energy [DE-AC02-05CH11231, DE-FG02-01ER45885]; DOE/BES
[DE-AC02-06CH11357]
FX We acknowledge funding from the National Science Foundation Grant Nos.
DMR-0512165, DMR-0507146, DMR-0820404, DMR-0507146, DMR-0820404, and
DMR-0602986, DMR-0520513, DMR-0213623, and DMR-0520471 the MSD, BES U.S.
Department of Energy under Contract Nos. DE-AC02-05CH11231 and
DE-FG02-01ER45885 and the DOE/BES under Contract No. DE-AC02-06CH11357.
NR 25
TC 30
Z9 30
U1 1
U2 28
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 20
PY 2009
VL 94
IS 16
AR 161905
DI 10.1063/1.3118576
PG 3
WC Physics, Applied
SC Physics
GA 442ER
UT WOS:000265823300020
ER
PT J
AU Sakiyama, Y
Tomai, T
Miyano, M
Graves, DB
AF Sakiyama, Yukinori
Tomai, Takaaki
Miyano, Masaru
Graves, David B.
TI Disinfection of E. coli by nonthermal microplasma electrolysis in normal
saline solution
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE biological techniques; cellular biophysics; electrochemical electrodes;
electrolysis; microorganisms; spectrochemical analysis; titanium
ID PULSED ELECTRIC-FIELDS; ELECTROCHEMICAL DISINFECTION; BACTERICIDAL
ACTIVITY; DISCHARGES; CELLS; WATER
AB We present a unique method to inactivate microorganisms in 0.9% NaCl solution (normal saline solution) by means of microplasmas. The device consists of a thin titanium wire covered by a glass tube for insulation except the tip and a ground electrode. Application of an asymmetric high-frequency, high voltage results in the formation of microbubbles at both electrodes. Repetitive light emission is observed in the vicinity of the powered electrode. We employed E. coli bacteria to investigate the disinfection efficiency of the device. More than 99.5% of E. coli were deactivated in 180 s. The survival curve showed biphasic behavior.
C1 [Sakiyama, Yukinori; Graves, David B.] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
[Tomai, Takaaki] Univ Tokyo, Dept Adv Mat Sci, Chiba 2778561, Japan.
[Miyano, Masaru] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
RP Sakiyama, Y (reprint author), Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
EM ysaki@berkeley.edu
FU Japan Society for the Promotion of Science
FX The authors would like to thank Professor A. Majumdar of the Department
of Mechanical Engineering, University of California at Berkeley, and
Professor K. Kitano of the Center for Atomic and Molecular Technologies,
Osaka University. T.T. is supported by Grants-in-Aid for the Research
Fellowships for Young Scientists from the Japan Society for the
Promotion of Science.
NR 14
TC 40
Z9 40
U1 0
U2 14
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 20
PY 2009
VL 94
IS 16
AR 161501
DI 10.1063/1.3122148
PG 3
WC Physics, Applied
SC Physics
GA 442ER
UT WOS:000265823300015
ER
PT J
AU Tsetseris, L
Logothetidis, S
Pantelides, ST
AF Tsetseris, L.
Logothetidis, S.
Pantelides, S. T.
TI Migration of species in a prototype diffusion barrier: Cu, O, and H in
TiN
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE ab initio calculations; copper; diffusion barriers; hydrogen;
impurities; stoichiometry; titanium compounds; voids (solid)
ID GRAIN-BOUNDARY DIFFUSION; NITRIDE THIN-FILMS; AUGMENTED-WAVE METHOD; MOS
DEVICES; COPPER; HYDROGEN; METALLIZATION; SILICON; LAYERS
AB Experimental data on the migration of Cu impurities in TiN and in similar diffusion-barriers used in electronic devices have led to conflicting suggestions about the underlying physical mechanisms. Here we use results of first-principles calculations, which are in agreement with measured activations energies, to elucidate the atomic-scale processes of moderate and rapid diffusion of Cu through the bulk and intergrain voids of TiN films, respectively. We also find that O and H impurities are fast diffusers in TiN. The results offer an assessment for the efficiency of TiN diffusion-barriers with respect to properties, such as nature of impurities, stoichiometry, and crystallinity.
C1 [Tsetseris, L.; Logothetidis, S.] Aristotle Univ Thessaloniki, Dept Phys, GR-54124 Thessaloniki, Greece.
[Tsetseris, L.; Pantelides, S. T.] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
[Pantelides, S. T.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Tsetseris, L (reprint author), Aristotle Univ Thessaloniki, Dept Phys, GR-54124 Thessaloniki, Greece.
EM leonidas.tsetseris@vanderbilt.edu
FU McMinn Endowment at Vanderbilt University; AFOSR MURI [FA9550-05-1-0306]
FX The authors acknowledge support by the McMinn Endowment at Vanderbilt
University and AFOSR MURI under Grant No. FA9550-05-1-0306.
NR 30
TC 24
Z9 24
U1 2
U2 47
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 20
PY 2009
VL 94
IS 16
AR 161903
DI 10.1063/1.3122344
PG 3
WC Physics, Applied
SC Physics
GA 442ER
UT WOS:000265823300018
ER
PT J
AU Xu, WZ
Ye, ZZ
Zeng, YJ
Zhu, LP
Zhao, BH
Jiang, L
Lu, JG
He, HP
Zhang, SB
AF Xu, W. Z.
Ye, Z. Z.
Zeng, Y. J.
Zhu, L. P.
Zhao, B. H.
Jiang, L.
Lu, J. G.
He, H. P.
Zhang, S. B.
TI ZnO light-emitting diode grown by plasma-assisted metal organic chemical
vapor deposition (vol 88, 173506 2006)
SO APPLIED PHYSICS LETTERS
LA English
DT Correction
DE II-VI semiconductors; light emitting diodes; MOCVD; plasma materials
processing; wide band gap semiconductors; zinc compounds
C1 [Xu, W. Z.; Ye, Z. Z.; Zeng, Y. J.; Zhu, L. P.; Zhao, B. H.; Jiang, L.; Lu, J. G.; He, H. P.] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China.
[Zhang, S. B.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Ye, ZZ (reprint author), Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China.
EM yezz@zju.edu.cn
RI Krausnick, Jennifer/D-6291-2013; Zhang, Shengbai/D-4885-2013
OI Zhang, Shengbai/0000-0003-0833-5860
NR 1
TC 0
Z9 0
U1 2
U2 20
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 20
PY 2009
VL 94
IS 16
AR 169901
DI 10.1063/1.3122923
PG 1
WC Physics, Applied
SC Physics
GA 442ER
UT WOS:000265823300106
ER
PT J
AU Yang, S
Halliburton, LE
Manivannan, A
Bunton, PH
Baker, DB
Klemm, M
Horn, S
Fujishima, A
AF Yang, Shan
Halliburton, L. E.
Manivannan, A.
Bunton, P. H.
Baker, D. B.
Klemm, M.
Horn, S.
Fujishima, A.
TI Photoinduced electron paramagnetic resonance study of electron traps in
TiO2 crystals: Oxygen vacancies and Ti3+ ions
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE electron traps; paramagnetic resonance; titanium compounds; vacancies
(crystal)
ID TITANIUM-DIOXIDE; DOPED TIO2; RUTILE; DEFECTS; PHOTOCATALYSTS
AB Electron paramagnetic resonance (EPR) is used to identify photoinduced titanium-associated electron traps in TiO2 crystals (rutile). Defect production occurs at low temperature with 442 nm laser light. Spectra with S=1/2 and S=1 are assigned to singly ionized and neutral oxygen vacancies, respectively. These oxygen vacancies have their unpaired spins localized on the two neighboring titanium ions aligned along the c axis. A Ti3+ ion next to a Si4+ ion, a Ti3+ self-trapped electron, and a self-trapped hole shared by two adjacent oxygen ions are also observed. Isolated substitutional Fe3+ and Cr3+ ions serve as hole traps.
C1 [Yang, Shan; Halliburton, L. E.; Manivannan, A.] W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA.
[Manivannan, A.] Natl Energy Technol Lab, Morgantown, WV 26507 USA.
[Bunton, P. H.; Baker, D. B.] William Jewell Coll, Dept Phys, Liberty, MO 64068 USA.
[Klemm, M.; Horn, S.] Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany.
[Fujishima, A.] Kanagawa Acad Sci & Technol, Takatsu Ku, Kanagawa 2130012, Japan.
RP Yang, S (reprint author), W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA.
EM larry.halliburton@mail.wvu.edu
RI Manivannan, Ayyakkannu/A-2227-2012; Yang, Shan /F-5020-2012; Fujishima,
Akira/G-7701-2012
OI Manivannan, Ayyakkannu/0000-0003-0676-7918;
NR 19
TC 62
Z9 63
U1 9
U2 68
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 20
PY 2009
VL 94
IS 16
AR 162114
DI 10.1063/1.3124656
PG 3
WC Physics, Applied
SC Physics
GA 442ER
UT WOS:000265823300038
ER
PT J
AU Graf, A
Beiersdorfer, P
Brown, GV
Gu, MF
AF Graf, A.
Beiersdorfer, P.
Brown, G. V.
Gu, M. F.
TI MEASUREMENT AND MODELING OF Na-LIKE Fe XVI INNER-SHELL SATELLITES
BETWEEN 14.5 angstrom AND 18 angstrom
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE line: identification; X-rays: general
ID BEAM ION-TRAP; X-RAY-SPECTRUM; ELECTRON-BEAM; LABORATORY MEASUREMENTS;
CRYSTAL SPECTROMETER; RELATIVE INTENSITY; CROSS-SECTIONS; LINE EMISSION;
SOLAR; IRON
AB We have used the University of California Lawrence Livermore National Laboratory's EBIT-I electron beam ion trap to perform measurements of the wavelengths and relative intensities of the X-ray lines from inner-shell satellite transitions in sodium-like Fe XVI. The measurements were carried out with high-resolution crystal and grating spectrometers and covered the 14.5-18 angstrom wavelength band. In contrast to some predicted line strengths and positions found in the literature, our results show that the strongest relatively unblended inner-shell satellites of Fe XVI are located near 15.2 angstrom. This is near the location of the 3d --> 2p intercombination line in Fe XVII. Calculations using the Flexible Atomic Code (FAC) are presented. The average deviation between the EBIT-I measurements and the FAC calculations for the wavelength positions and line ratios are 22 m angstrom and a factor of 2.3, respectively, where the average is taken over the ten features included in this work.
C1 [Graf, A.] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
[Beiersdorfer, P.; Brown, G. V.; Gu, M. F.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Graf, A (reprint author), Univ Calif Davis, Dept Phys, 1 Shields Ave, Davis, CA 95616 USA.
FU Department of Energy [W-7405-ENG-48]; National Aeronautics and Space
Administration ( NASA) [NNG06WF081]
FX The work at Lawrence Livermore National Laboratory was performed under
the auspices of the Department of Energy under Contract W-7405-ENG-48
and supported by the Astronomy and Physics Research and Analysis Program
of the National Aeronautics and Space Administration ( NASA) under
contract NNG06WF081.
NR 49
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U1 0
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PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD APR 20
PY 2009
VL 695
IS 2
BP 818
EP 824
DI 10.1088/0004-637X/695/2/818
PG 7
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 430VS
UT WOS:000265018300003
ER
PT J
AU Geballe, TR
Saumon, D
Golimowski, DA
Leggett, SK
Marley, MS
Noll, KS
AF Geballe, T. R.
Saumon, D.
Golimowski, D. A.
Leggett, S. K.
Marley, M. S.
Noll, K. S.
TI SPECTROSCOPIC DETECTION OF CARBON MONOXIDE IN TWO LATE-TYPE T DWARFS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE infrared: general; stars: individual (Gliese 570D, 2MASS
J09373487+2931409); stars: low-mass, brown dwarfs
ID GLIESE 229B; BROWN DWARFS; SPECTRAL CLASSIFICATION; ATMOSPHERIC
CHEMISTRY; CHEMICAL-EQUILIBRIUM; ULTRACOOL DWARFS; SOLAR-SYSTEM;
ABUNDANCES; PHOTOMETRY; JUPITER
AB M-band spectra of two late-type T dwarfs, 2MASS J09373487+2931409, and Gliese 570D, confirm evidence from photometry that photospheric carbon monoxide (CO) is present at abundance levels far in excess of those predicted from chemical equilibrium. These new and unambiguous detections of CO, together with an earlier spectroscopic detection of CO in Gliese 229B and existing M-band photometry of a large selection of T dwarfs, suggest that vertical mixing in the photosphere drives the CO abundance out of chemical equilibrium and is a common, and likely universal feature of mid-to-late-type T dwarfs. The M-band spectra allow determinations of the timescale of vertical mixing in the radiative region of the atmosphere of each object, the first such measurements of this important parameter in late T dwarfs. A detailed analysis of the spectral energy distribution of 2MASS J09373487+2931409 results in the following values for metallicity, temperature, surface gravity, and luminosity: [M/H] similar to -0.3, T(eff) = 925-975 K, log g = 5.20-5.47, and log L/L(circle dot) = -5.308 +/- 0.027. The age is 3-10 Gyr and the mass is in the range 45-69 M(Jup).
C1 [Geballe, T. R.; Leggett, S. K.] Gemini Observ, Hilo, HI 96720 USA.
[Saumon, D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Golimowski, D. A.] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
[Marley, M. S.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
[Noll, K. S.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
RP Geballe, TR (reprint author), Gemini Observ, 670 N Aohoku Pl, Hilo, HI 96720 USA.
EM tgeballe@gemini.edu
RI Noll, Keith/C-8447-2012; Marley, Mark/I-4704-2013
NR 47
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U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD APR 20
PY 2009
VL 695
IS 2
BP 844
EP 854
DI 10.1088/0004-637X/695/2/844
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 430VS
UT WOS:000265018300006
ER
PT J
AU Dong, SB
Gould, A
Udalski, A
Anderson, J
Christie, GW
Gaudi, BS
Jaroszynski, M
Kubiak, M
Szymanski, MK
Pietrzynski, G
Soszynski, I
Szewczyk, O
Ulaczyk, K
Wyrzykowski, L
DePoy, DL
Fox, DB
Gal-Yam, A
Han, C
Lepine, S
McCormick, J
Ofek, E
Park, BG
Pogge, RW
Abe, F
Bennett, DP
Bond, IA
Britton, TR
Gilmore, AC
Hearnshaw, JB
Itow, Y
Kamiya, K
Kilmartin, PM
Korpela, A
Masuda, K
Matsubara, Y
Motomura, M
Muraki, Y
Nakamura, S
Ohnishi, K
Okada, C
Rattenbury, N
Saito, T
Sako, T
Sasaki, M
Sullivan, D
Sumi, T
Tristram, PJ
Yanagisawa, T
Yock, PCM
Yoshoika, T
Albrow, MD
Beaulieu, JP
Brillant, S
Calitz, H
Cassan, A
Cook, KH
Coutures, C
Dieters, S
Prester, DD
Donatowicz, J
Fouque, P
Greenhill, J
Hill, K
Hoffman, M
Horne, K
Jorgensen, UG
Kane, S
Kubas, D
Marquette, JB
Martin, R
Meintjes, P
Menzies, J
Pollard, KR
Sahu, KC
Vinter, C
Wambsganss, J
Williams, A
Bode, M
Bramich, DM
Burgdorf, M
Snodgrass, C
Steele, I
Doublier, V
Foellmi, C
AF Dong, Subo
Gould, Andrew
Udalski, Andrzej
Anderson, Jay
Christie, G. W.
Gaudi, B. S.
Jaroszynski, M.
Kubiak, M.
Szymanski, M. K.
Pietrzynski, G.
Soszynski, I.
Szewczyk, O.
Ulaczyk, K.
Wyrzykowski, L.
DePoy, D. L.
Fox, D. B.
Gal-Yam, A.
Han, C.
Lepine, S.
McCormick, J.
Ofek, E.
Park, B. -G.
Pogge, R. W.
Abe, F.
Bennett, D. P.
Bond, I. A.
Britton, T. R.
Gilmore, A. C.
Hearnshaw, J. B.
Itow, Y.
Kamiya, K.
Kilmartin, P. M.
Korpela, A.
Masuda, K.
Matsubara, Y.
Motomura, M.
Muraki, Y.
Nakamura, S.
Ohnishi, K.
Okada, C.
Rattenbury, N.
Saito, To.
Sako, T.
Sasaki, M.
Sullivan, D.
Sumi, T.
Tristram, P. J.
Yanagisawa, T.
Yock, P. C. M.
Yoshoika, T.
Albrow, M. D.
Beaulieu, J. P.
Brillant, S.
Calitz, H.
Cassan, A.
Cook, K. H.
Coutures, Ch.
Dieters, S.
Prester, D. Dominis
Donatowicz, J.
Fouque, P.
Greenhill, J.
Hill, K.
Hoffman, M.
Horne, K.
Jorgensen, U. G.
Kane, S.
Kubas, D.
Marquette, J. B.
Martin, R.
Meintjes, P.
Menzies, J.
Pollard, K. R.
Sahu, K. C.
Vinter, C.
Wambsganss, J.
Williams, A.
Bode, M.
Bramich, D. M.
Burgdorf, M.
Snodgrass, C.
Steele, I.
Doublier, Vanessa
Foellmi, Cedric
CA OGLE Collaboration
FUN Collaboration
MOA Collaboration
PLANET RoboNet Collaborations
TI OGLE-2005-BLG-071Lb, THE MOST MASSIVE M DWARF PLANETARY COMPANION?
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Galaxy: bulge; gravitational lensing; planetary systems
ID GAS GIANT PLANETS; STANDARD STELLAR LIBRARY; MICROLENSING EVENT;
EVOLUTIONARY SYNTHESIS; DETERMINISTIC MODEL; GRAVITATIONAL LENS;
EXTRASOLAR PLANET; GALACTIC BULGE; HOST STARS; MASSES
AB We combine all available information to constrain the nature of OGLE-2005-BLG-071Lb, the second planet discovered by microlensing and the first in a high-magnification event. These include photometric and astrometric measurements from the Hubble Space Telescope, as well as constraints from higher order effects extracted from the ground-based light curve, such as microlens parallax, planetary orbital motion, and finite-source effects. Our primary analysis leads to the conclusion that the host of Jovian planet OGLE-2005-BLG-071Lb is an M dwarf in the foreground disk with mass M = 0.46 +/- 0.04 M(circle dot), distance D(l) = 3.2 +/- 0.4 kpc, and thick-disk kinematics v(LSR) similar to 103 km s(-1). From the best-fit model, the planet has mass M(p) = 3.8 +/- 0.4 M(Jupiter), lies at a projected separation r(perpendicular to) = 3.6 +/- 0.2AU from its host, and so has an equilibrium temperature of T similar to 55 K, that is, similar to Neptune. A degenerate model gives similar planetary mass M(p) = 3.4 +/- 0.4 M(Jupiter) with a smaller projected separation, r(perpendicular to) = 2.1 +/- 0.1AU, and higher equilibrium temperature, T similar to 71 K. These results from the primary analysis suggest that OGLE-2005-BLG-071Lb is likely to be the most massive planet yet discovered that is hosted by an M dwarf. However, the formation of such high-mass planetary companions in the outer regions of M dwarf planetary systems is predicted to be unlikely within the core-accretion scenario. There are a number of caveats to this primary analysis, which assumes (based on real but limited evidence) that the unlensed light coincident with the source is actually due to the lens, that is, the planetary host. However, these caveats could mostly be resolved by a single astrometric measurement a few years after the event.
C1 [Dong, Subo; Gould, Andrew; Gaudi, B. S.; DePoy, D. L.] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
[Gould, Andrew; Jaroszynski, M.; Kubiak, M.; Szymanski, M. K.; Pietrzynski, G.; Soszynski, I.; Szewczyk, O.; Ulaczyk, K.; Wyrzykowski, L.] Univ Warsaw Observ, PL-00478 Warsaw, Poland.
[Anderson, Jay; Sahu, K. C.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
[Christie, G. W.] Auckland Observ, Auckland, New Zealand.
[Pietrzynski, G.; Szewczyk, O.] Univ Concepcion, Dept Fis, Concepcion, Chile.
[Wyrzykowski, L.] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.
[Fox, D. B.] Penn State Univ, University Pk, PA 16802 USA.
[Gal-Yam, A.] Weizmann Inst Sci, Benoziyo Ctr Astrophys, IL-76100 Rehovot, Israel.
[Han, C.] Chungbuk Natl Univ, Dept Phys, Program Brain Korea, Chonju 371763, South Korea.
[Lepine, S.] Amer Museum Nat Hist, Dept Astrophys, Div Phys Sci, New York, NY 10024 USA.
[McCormick, J.] Farm Cove Observ, Ctr Backyard Astrophys, Auckland, New Zealand.
[Ofek, E.] CALTECH, Div Phys Math & Astron, Pasadena, CA 91125 USA.
[Park, B. -G.] Korea Astron & Space Sci Inst, Taejon 305348, South Korea.
[Abe, F.; Itow, Y.; Kamiya, K.; Masuda, K.; Matsubara, Y.; Motomura, M.; Nakamura, S.; Okada, C.; Sako, T.; Sasaki, M.; Sumi, T.; Yoshoika, T.] Nagoya Univ, Solar Terr Environm Lab, Nagoya, Aichi 4648601, Japan.
[Bennett, D. P.] Notre Dame Univ, Dept Phys, Notre Dame, IN 46556 USA.
[Bond, I. A.] Massey Univ, Inst Informat & Math Sci, Auckland 1330, New Zealand.
[Britton, T. R.; Gilmore, A. C.; Hearnshaw, J. B.; Albrow, M. D.; Pollard, K. R.] Univ Canterbury, Dept Phys & Astron, Christchurch 8020, New Zealand.
[Kilmartin, P. M.; Tristram, P. J.] Mt John Observ, Lake Tekapo 8770, New Zealand.
[Korpela, A.; Sullivan, D.] Victoria Univ, Sch Chem & Phys Sci, Wellington, New Zealand.
[Muraki, Y.] Konan Univ, Dept Phys, Kobe, Hyogo 6588501, Japan.
[Ohnishi, K.] Nagano Natl Coll Technol, Nagano 3818550, Japan.
[Rattenbury, N.] Univ Manchester, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England.
[Saito, To.] Tokyo Metropolitan Coll Ind Technol, Tokyo 1168523, Japan.
[Yanagisawa, T.] Japan Aerosp Explorat Agcy, Inst Aerosp Technol, Adv Space Technol Res Grp, Tokyo, Japan.
[Yock, P. C. M.] Univ Auckland, Dept Phys, Auckland 1001, New Zealand.
[Beaulieu, J. P.; Coutures, Ch.; Marquette, J. B.] Inst Astrophys, F-75014 Paris, France.
[Brillant, S.; Kubas, D.; Snodgrass, C.] European So Observ, Santiago 19, Chile.
[Calitz, H.; Hoffman, M.; Meintjes, P.] Univ Orange Free State, Dept Phys, Boyden Observ, ZA-9300 Bloemfontein, South Africa.
[Cassan, A.; Wambsganss, J.] Univ Heidelberg, Astron Rech Inst, Zentrum Astron, D-69120 Heidelberg, Germany.
[Cook, K. H.] Lawrence Livermore Natl Lab, IGPP, Livermore, CA 94551 USA.
[Dieters, S.; Greenhill, J.; Hill, K.] Univ Tasmania, Sch Maths & Phys, Hobart, Tas 7001, Australia.
[Prester, D. Dominis] Univ Rijeka, Dept Phys, Rijeka 51000, Croatia.
[Donatowicz, J.] Vienna Univ Technol, Dept Comp, A-1060 Vienna, Austria.
[Martin, R.; Williams, A.] Perth Observ, Perth, WA 6076, Australia.
[Kane, S.] CALTECH, Michelson Sci Ctr, Pasadena, CA 91125 USA.
[Jorgensen, U. G.; Vinter, C.] Niels Bohr Inst, Astron Observ, DK-2100 Copenhagen, Denmark.
[Bode, M.; Burgdorf, M.; Steele, I.] Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England.
[Menzies, J.] S African Astron Observ, ZA-7935 Cape Town, South Africa.
[Horne, K.] Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland.
[Fouque, P.] Univ Toulouse, CNRS, LATT, F-31400 Toulouse, France.
[Foellmi, Cedric] Observ Grenoble, LAOG, F-38041 Grenoble, France.
[Doublier, Vanessa] ESO, D-85748 Garching, Germany.
[Bramich, D. M.] Isaac Newton Grp Telescopes, E-38700 Santa Cruz De La Palma, Canary Islands, Spain.
EM dong@astronomy.ohio-state.edu; gould@astronomy.ohio-state.edu;
udalski@astrouw.edu.pl; jayander@stsci.edu; gwchristie@christie.org.nz;
gaudi@astronomy.ohio-state.edu; mj@astrouw.edu.pl; msz@astrouw.edu.pl;
mk@astrouw.edu.pl; pietrzyn@astrouw.edu.pl; soszynsk@astrouw.edu.pl;
szewczyk@astro-udec.cl; kulaczyk@astrouw.edu.pl; wyrzykow@ast.cam.ac.uk;
depoy@astronomy.ohio-state.edu; dfox@astro.psu.edu;
avishay.gal-yam@weizmann.ac.il; cheongho@astroph.chungbuk.ac.kr;
lepine@amnh.org; farmcoveobs@xtra.co.nz; eran@astro.caltech.edu;
bgpark@kasi.re.kr; pogge@astronomy.ohio-state.edu
RI Gaudi, Bernard/I-7732-2012; Dong, Subo/J-7319-2012; Kane,
Stephen/B-4798-2013; Greenhill, John/C-8367-2013; Williams,
Andrew/K-2931-2013;
OI Williams, Andrew/0000-0001-9080-0105; Snodgrass,
Colin/0000-0001-9328-2905
FU NASA [NAS5-26555, NNG04GL51G]; STScI [HST-GO-10707.01-A]; NSF [AST
042758]; IAP; CNRS; Polish MNiSW [N20303032/4275]; Korea Research
Foundation [KRF-2006-311-C00072]; Korea Science and Engineering
Foundation; Ministry of Education, Culture, Sports, Science and
Technology (MEXT) of Japan [14002006]; ANR HOLMES; Lawrence Livermore
National Laboratory [DE-AC52-07NA27344]
FX We thank M. Pinsonneault and D. An for providing us their unpublished
isochrones. S. D. wishes to thank D. Will of Ohio State astronomy
department for setting up and maintaining the Condor system, which
greatly facilitates the computations for this work. S. D. is grateful to
O. Pejcha and D. Heyrovsky for interesting discussions on
limb-darkening. Based on observations with the NASA/ESA HST obtained at
the Space Telescope Science Institute, which is operated by the
Association of Universities for Research in Astronomy, Incorporated,
under NASA contract NAS5-26555. Support for this work was provided by
NASA through grant HST-GO-10707.01-A from STScI. S. D. and A. G. were
supported in part by grant AST 042758 from the NSF. S. D., A. G., D. D.,
and R. P. acknowledge support by NASA grant NNG04GL51G. A. G. thanks
IAP, CNRS for its support. Support for OGLE project was provided by
Polish MNiSW grant N20303032/4275. B. G. P. was supported by the grant
(KRF-2006-311-C00072) from Korea Research Foundation. H. C. was
supported by the Science Research Center from Korea Science and
Engineering Foundation. The MOA project is supported by Ministry of
Education, Culture, Sports, Science and Technology (MEXT) of Japan,
Grant-in-Aid for Specially Promoted Research No. 14002006. J.P.B., P.
F., A. C., C. C., S. B., J. B. M. acknowledge the financial support of
ANR HOLMES. K. H. C.'s work was performed under the auspices of the U.
S. Department of Energy by Lawrence Livermore National Laboratory under
Contract DE-AC52-07NA27344. This work was supported in part by an
allocation of computing time from the Ohio Supercomputer Center.
NR 64
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PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD APR 20
PY 2009
VL 695
IS 2
BP 970
EP 987
DI 10.1088/0004-637X/695/2/970
PG 18
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 430VS
UT WOS:000265018300018
ER
PT J
AU Yirak, K
Frank, A
Cunningham, AJ
Mitran, S
AF Yirak, Kristopher
Frank, Adam
Cunningham, Andrew J.
Mitran, Sorin
TI HYPERSONIC BUCKSHOT: ASTROPHYSICAL JETS AS HETEROGENEOUS COLLIMATED
PLASMOIDS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE hydrodynamics; ISM: Herbig-Haro objects; ISM: jets and outflows
ID HUBBLE-SPACE-TELESCOPE; VARIABLE VELOCITY JET; HERBIG-HARO OBJECTS;
STELLAR JETS; PROPER MOTIONS; 3-DIMENSIONAL SIMULATIONS; HH-111 JET;
HYDRODYNAMIC INTERACTION; NUMERICAL SIMULATIONS; TRANSVERSE VELOCITY
AB Herbig-Haro jets are commonly thought of as homogeneous beams of plasma traveling at hypersonic velocities. Structure within jet beams is often attributed to periodic or "pulsed" variations of conditions at the jet source. Simulations based on this scenario result in knots extending across the jet diameter. Observations and recent high energy density laboratory experiments shed new light on structures below this scale and indicate they may be important for understanding the fundamentals of jet dynamics. In this paper, we offer an alternative to "pulsed" models of protostellar jets. Using direct numerical simulations we explore the possibility that jets are chains of subradial clumps propagating through a moving interclump medium. Our models explore an idealization of this scenario by injecting small (r r(jet)), dense (rho > rho(jet)) spheres embedded in an otherwise smooth interclump jet flow. The spheres are initialized with velocities differing from the jet velocity by similar to 15%. We find that the consequences of shifting from homogeneous to heterogeneous flows are significant as clumps interact with each other and with the interclump medium in a variety of ways. Structures which mimic what is expected from pulsed-jet models can form, as can be previously unseen, "subradial" behaviors including backward facing bow shocks and off-axis working surfaces. While these small-scale structures have not been seen before in simulation studies, they are found in high-resolution jet observations. We discuss implications of our simulations for the interpretation of protostellar jets with regard to characterization of knots by a "lifetime" or "velocity history" approach as well as linking observed structures with central engines which produce the jets.
C1 [Yirak, Kristopher; Frank, Adam; Cunningham, Andrew J.] Univ Rochester, Dept Phys & Astron, Rochester, NY 14620 USA.
[Cunningham, Andrew J.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Mitran, Sorin] Univ N Carolina, Dept Math, Program Appl Math, Chapel Hill, NC 27599 USA.
RP Yirak, K (reprint author), Univ Rochester, Dept Phys & Astron, Rochester, NY 14620 USA.
EM yirak@pas.rochester.edu
RI Mitran, Sorin/G-4682-2011
FU NASA [20269, 051080-001]; National Science Foundation [AST-0507519];
Space Telescope Science Institute [HST-AR-10972, HST-AR-11250,
HST-AR-11252]; DOE [DE-FC03-02NA00057]
FX Support for this work was in part provided by NASA through awards issued
by JPL/Caltech through Spitzer program 20269 and 051080-001, the
National Science Foundation through grants AST-0507519 as well as the
Space Telescope Science Institute through grants HST-AR-10972,
HST-AR-11250, and HST-AR-11252. We also thank the University of
Rochester Laboratory for Laser Energetics and funds received through the
DOE Cooperative Agreement no. DE-FC03-02NA00057.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD APR 20
PY 2009
VL 695
IS 2
BP 999
EP 1005
DI 10.1088/0004-637X/695/2/999
PG 7
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 430VS
UT WOS:000265018300021
ER
PT J
AU Birn, J
Fletcher, L
Hesse, M
Neukirch, T
AF Birn, J.
Fletcher, L.
Hesse, M.
Neukirch, T.
TI ENERGY RELEASE AND TRANSFER IN SOLAR FLARES: SIMULATIONS OF
THREE-DIMENSIONAL RECONNECTION
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE MHD; Sun: corona; Sun: magnetic fields
ID X-RAY SOURCES; MAGNETIC RECONNECTION; FLUX ROPES; CHROMOSPHERIC
EVAPORATION; PARTICLE-ACCELERATION; EMISSION MEASURE; ACTIVE-REGION;
ALFVEN WAVES; TEMPERATURE; EVOLUTION
AB Using three-dimensional magnetohydrodynamic simulations we investigate energy release and transfer in a three-dimensional extension of the standard two-ribbon flare picture. In this scenario, reconnection is initiated in a thin current sheet (suggested to form below a departing coronal mass ejection) above a bipolar magnetic field. Two cases are contrasted: an initially force-free current sheet (low beta) and a finite-pressure current sheet (high beta), where beta represents the ratio between gas (plasma) and magnetic pressure. The energy conversion process from reconnection consists of incoming Poynting flux turned into up-and downgoing Poynting flux, enthalpy flux, and bulk kinetic energy flux. In the low-beta case, the outgoing Poynting flux is the dominant contribution, whereas the outgoing enthalpy flux dominates in the high-beta case. The bulk kinetic energy flux is only a minor contribution in the downward direction. The dominance of the downgoing Poynting flux in the low-beta case is consistent with an alternative to the thick target electron beam model for solar flare energy transport, suggested recently by Fletcher & Hudson, whereas the enthalpy flux may act as an alternative transport mechanism. For plausible characteristic parameters of the reconnecting field configuration, we obtain energy release timescales and energy output rates that compare favorably with those inferred from observations for the impulsive phase of flares. Significant enthalpy flux and heating are found even in the initially force-free case with very small background beta, resulting mostly from adiabatic compression rather than Ohmic dissipation. The energy conversion mechanism is most easily understood as a two-step process (although the two steps may occur essentially simultaneously): the first step is the acceleration of the plasma by Lorentz forces in layers akin to the slow shocks in the Petschek reconnection model, involving the conversion of magnetic energy to bulk kinetic energy. However, due to pressure gradient forces that oppose the Lorentz forces in approximate, or partial force balance, the accelerated plasma becomes slowed down and compressed, whereby the bulk kinetic energy is converted to heat, either locally deposited or transported away by enthalpy flux and deposited later. This mechanism is most relevant in the downflow region, which is more strongly governed by force balance; it is less important in the outflow above the reconnection site, where more energy remains in the form of fast bulk flow.
C1 [Birn, J.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Fletcher, L.] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland.
[Hesse, M.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Neukirch, T.] Univ St Andrews, St Andrews KY16 9AJ, Fife, Scotland.
RP Birn, J (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM jbirn@lanl.gov
RI Neukirch, Thomas/C-1981-2009; Hesse, Michael/D-2031-2012; NASA MMS,
Science Team/J-5393-2013
OI Neukirch, Thomas/0000-0002-7597-4980; NASA MMS, Science
Team/0000-0002-9504-5214
FU US Department of Energy; NASA; UK STFC [ST/F002637]; European Commission
[MTRNCT-2006-035484]
FX This work was conducted under the auspices of the US Department of
Energy, supported by NASA through its Heliophysic Theory, Living With a
Star, and Supporting Research and Technology programs. L. F. and T.N.
acknowledges support by the UK STFC under rolling grant ST/F002637 and
by the European Commission through the SOLAIRE Network
(MTRNCT-2006-035484).
NR 45
TC 30
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U1 0
U2 8
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD APR 20
PY 2009
VL 695
IS 2
BP 1151
EP 1162
DI 10.1088/0004-637X/695/2/1151
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 430VS
UT WOS:000265018300034
ER
PT J
AU Faure, C
Kneib, JP
Hilbert, S
Massey, R
Covone, G
Finoguenov, A
Leauthaud, A
Taylor, JE
Pires, S
Scoville, N
Koekemoer, AM
AF Faure, C.
Kneib, J. -P.
Hilbert, S.
Massey, R.
Covone, G.
Finoguenov, A.
Leauthaud, A.
Taylor, J. E.
Pires, S.
Scoville, N.
Koekemoer, Anton M.
TI ON THE CONTRIBUTION OF LARGE-SCALE STRUCTURE TO STRONG GRAVITATIONAL
LENSING
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: abundances; gravitational lensing; large-scale structure of
universe
ID IMAGE SEPARATION DISTRIBUTION; WIDE-FIELD SURVEY; COSMOS FIELD;
COSMOLOGICAL PARAMETERS; GALAXY ENVIRONMENTS; OPTICAL DEPTHS; CDM
UNIVERSE; LENSES; SIMULATIONS; CLUSTERS
AB We study the correlation between the locations of galaxy-galaxy strong-lensing candidates and tracers of large-scale structure from both weak lensing (WL) or X-ray emission. The Cosmological Evolution Survey (COSMOS) is a unique data set, combining deep, high resolution and contiguous imaging in which strong lenses have been discovered, plus unparalleled multiwavelength coverage. To help interpret the COSMOS data, we have also produced mock COSMOS strong-and WL observations, based on ray-tracing through the Millennium Simulation. In agreement with the simulations, we find that strongly lensed images with the largest angular separations are found in the densest regions of the COSMOS field. This is explained by a prevalence among the lens population in dense environments of elliptical galaxies with high total-to-stellar mass ratios, which can deflect light through larger angles. However, we also find that the overall fraction of elliptical galaxies with strong gravitational lensing is independent of the local mass density; this observation is not true of the simulations, which predict an increasing fraction of strong lenses in dense environments. The discrepancy may be a real effect, but could also be explained by various limitations of our analysis. For example, our visual search of strong lens systems could be incomplete and suffer from selection bias; the luminosity function of elliptical galaxies may differ between our real and simulated data; or the simplifying assumptions and approximations used in our lensing simulations may be inadequate. Work is therefore ongoing. Automated searches for strong lens systems will be particularly important in better constraining the selection function.
C1 [Faure, C.] Observ Sauverny, Astrophys Lab, EPFL, CH-1290 Sauverny, Versoix, Switzerland.
[Faure, C.] Univ Heidelberg, Astron Rech Inst, Zentrum Astron, D-69120 Heidelberg, Germany.
[Kneib, J. -P.] Univ Aix Marseille 1, Lab Astrophys Marseille, CNRS, F-13388 Marseille, France.
[Hilbert, S.] Argelander Inst Astron, D-53121 Bonn, Germany.
[Hilbert, S.] Max Planck Inst Astrophys, D-85741 Garching, Germany.
[Massey, R.] Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland.
[Covone, G.] Univ Naples Federico 2, Dept Phys Sci, I-80126 Naples, Italy.
[Covone, G.] Ist Nazl Fis Nucl Sez Napoli, Naples, Italy.
[Finoguenov, A.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Finoguenov, A.] Univ Maryland Baltimore Cty, Baltimore, MD 21250 USA.
[Leauthaud, A.] Univ Calif Berkeley, LBNL, Berkeley, CA 94720 USA.
[Leauthaud, A.] Univ Calif Berkeley, BCCP, Berkeley, CA 94720 USA.
[Taylor, J. E.] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada.
[Pires, S.] Univ Paris Diderot, Lab AIM, CEA DSM CNRS, IRFU SEDI SAP,Serv Astrophys,CEA Saclay, F-91191 Gif Sur Yvette, France.
[Scoville, N.] CALTECH, Pasadena, CA 91125 USA.
[Koekemoer, Anton M.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
RP Faure, C (reprint author), Observ Sauverny, Astrophys Lab, EPFL, CH-1290 Sauverny, Versoix, Switzerland.
OI Koekemoer, Anton/0000-0002-6610-2048; Massey,
Richard/0000-0002-6085-3780
FU CNRS; CNES; ANR [06-BLAN-0067]; DFG [SCHN 342/6, WH6/3]; STFC
[PP/E006450/1]
FX We are thankful to the referee for his/her useful report. J. P. K.
acknowledges support from CNRS, CNES, and the ANR through the grant
06-BLAN-0067. S. H. is supported by the DFG within the Priority
Programme 1177 under projects SCHN 342/6 and WH6/3. R. M. is supported
by STFC Advanced Fellowship PP/E006450/1.
NR 50
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PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD APR 20
PY 2009
VL 695
IS 2
BP 1233
EP 1243
DI 10.1088/0004-637X/695/2/1233
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 430VS
UT WOS:000265018300041
ER
PT J
AU Acciari, VA
Aliu, E
Arlen, T
Beilicke, M
Benbow, W
Bradbury, SM
Buckley, JH
Bugaev, V
Butt, Y
Byrum, KL
Celik, O
Cesarini, A
Ciupik, L
Chow, YCK
Cogan, P
Colin, P
Cui, W
Daniel, MK
Ergin, T
Falcone, AD
Fegan, SJ
Finley, JP
Fortin, P
Fortson, LF
Furniss, A
Gillanders, GH
Grube, J
Guenette, R
Gyuk, G
Hanna, D
Hays, E
Holder, J
Horan, D
Hui, CM
Humensky, TB
Imran, A
Kaaret, P
Karlsson, N
Kertzman, M
Kieda, DB
Kildea, J
Konopelko, A
Krawczynski, H
Krennrich, F
Lang, MJ
LeBohec, S
Maier, G
McCann, A
McCutcheon, M
Moriarty, P
Mukherjee, R
Nagai, T
Niemiec, J
Ong, RA
Pandel, D
Perkins, JS
Pohl, M
Quinn, J
Ragan, K
Reyes, LC
Reynolds, PT
Rose, HJ
Schroedter, M
Sembroski, GH
Smith, AW
Steele, D
Swordy, SP
Toner, JA
Valcarcel, L
Vassiliev, VV
Wagner, R
Wakely, SP
Ward, JE
Weekes, TC
Weinstein, A
White, RJ
Williams, DA
Wissel, SA
Wood, M
Zitzer, B
AF Acciari, V. A.
Aliu, E.
Arlen, T.
Beilicke, M.
Benbow, W.
Bradbury, S. M.
Buckley, J. H.
Bugaev, V.
Butt, Y.
Byrum, K. L.
Celik, O.
Cesarini, A.
Ciupik, L.
Chow, Y. C. K.
Cogan, P.
Colin, P.
Cui, W.
Daniel, M. K.
Ergin, T.
Falcone, A. D.
Fegan, S. J.
Finley, J. P.
Fortin, P.
Fortson, L. F.
Furniss, A.
Gillanders, G. H.
Grube, J.
Guenette, R.
Gyuk, G.
Hanna, D.
Hays, E.
Holder, J.
Horan, D.
Hui, C. M.
Humensky, T. B.
Imran, A.
Kaaret, P.
Karlsson, N.
Kertzman, M.
Kieda, D. B.
Kildea, J.
Konopelko, A.
Krawczynski, H.
Krennrich, F.
Lang, M. J.
LeBohec, S.
Maier, G.
McCann, A.
McCutcheon, M.
Moriarty, P.
Mukherjee, R.
Nagai, T.
Niemiec, J.
Ong, R. A.
Pandel, D.
Perkins, J. S.
Pohl, M.
Quinn, J.
Ragan, K.
Reyes, L. C.
Reynolds, P. T.
Rose, H. J.
Schroedter, M.
Sembroski, G. H.
Smith, A. W.
Steele, D.
Swordy, S. P.
Toner, J. A.
Valcarcel, L.
Vassiliev, V. V.
Wagner, R.
Wakely, S. P.
Ward, J. E.
Weekes, T. C.
Weinstein, A.
White, R. J.
Williams, D. A.
Wissel, S. A.
Wood, M.
Zitzer, B.
TI VERITAS OBSERVATIONS OF THE BL LAC OBJECT 1ES 1218+304
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE BL Lacertae objects: individual (1ES 1218+304); galaxies: active; gamma
rays: observations
ID EXTRAGALACTIC BACKGROUND LIGHT; ENERGY GAMMA-RAYS; RADIATION-FIELDS; TEV
BLAZARS; X-RAY; TELESCOPE; EMISSION; SPECTRA; DISCOVERY; HESS
AB The VERITAS collaboration reports the detection of very-high-energy gamma-ray emission from the high-frequency-peaked BL Lac object 1ES 1218+304 located at a redshift of z = 0.182. A gamma-ray signal was detected with a statistical significance of 10.4 standard deviations (10.4 sigma) for the observations taken during the first three months of 2007, confirming the discovery of this object made by the MAGIC collaboration. The photon spectrum between similar to 160 GeV and similar to 1.8 TeV is well described by a power law with an index of Gamma = 3.08 +/- 0.34(stat) +/- 0.2(sys). The integral flux is Phi (E > 200 GeV) = (12.2 +/- 2.6) x 10(-12) cm(-2) s(-1), which corresponds to similar to 6% of that of the Crab Nebula. The light curve does not show any evidence for very high energy flux variability. Using lower limits on the density of the extragalactic background light in the near to mid-infrared, we are able to limit the range of intrinsic energy spectra for 1ES 1218+304. We show that the intrinsic photon spectrum has an index that is harder than Gamma = 2.32 +/- 0.37(stat). When including constraints from the spectra of 1ES 1101-232 and 1ES 0229+200, the spectrum of 1ES 1218+ 304 is likely to be harder than Gamma = 1.86 +/- 0.37(stat).
C1 [Acciari, V. A.; Benbow, W.; Cesarini, A.; Hays, E.; Kildea, J.; Perkins, J. S.; Smith, A. W.; Toner, J. A.; Weekes, T. C.] Harvard Smithsonian Ctr Astrophys, Fred Lawrence Whipple Observ, Amado, AZ 85645 USA.
[Acciari, V. A.; Moriarty, P.] Galway Mayo Inst Technol, Dept Life & Phys Sci, Galway, Ireland.
[Aliu, E.; Holder, J.] Univ Delaware, Bartol Res Inst, Dept Phys & Astron, Newark, DE 19716 USA.
[Arlen, T.; Furniss, A.; Williams, D. A.] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA.
[Arlen, T.; Furniss, A.; Williams, D. A.] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA.
[Beilicke, M.; Buckley, J. H.; Bugaev, V.; Krawczynski, H.] Washington Univ, Dept Phys, St Louis, MO 63130 USA.
[Bradbury, S. M.; Daniel, M. K.; Rose, H. J.; Smith, A. W.] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England.
[Butt, Y.] Smithsonian Astrophys Observ, Cambridge, MA 02138 USA.
[Byrum, K. L.; Hays, E.; Horan, D.; Wagner, R.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Celik, O.; Chow, Y. C. K.; Fegan, S. J.; Ong, R. A.; Vassiliev, V. V.; Weinstein, A.; Wood, M.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
[Cesarini, A.; Gillanders, G. H.; Lang, M. J.; Toner, J. A.] Natl Univ Ireland, Dept Phys, Galway, Ireland.
[Ciupik, L.; Fortson, L. F.; Gyuk, G.; Karlsson, N.; Steele, D.] Adler Planetarium & Astron Museum, Dept Astron, Chicago, IL 60605 USA.
[Cogan, P.; Guenette, R.; Hanna, D.; Maier, G.; McCann, A.; McCutcheon, M.; Ragan, K.; Valcarcel, L.] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
[Colin, P.; Hui, C. M.; Kieda, D. B.; LeBohec, S.] Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA.
[Cui, W.; Finley, J. P.; Konopelko, A.; Sembroski, G. H.; Zitzer, B.] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA.
[Ergin, T.] Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA.
[Falcone, A. D.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Fortin, P.; Mukherjee, R.] Grinnell Coll, Dept Phys, Grinnell, IA 50112 USA.
[Grube, J.; Quinn, J.; Ward, J. E.] Columbia Univ, Barnard Coll, Dept Phys & Astron, New York, NY 10027 USA.
[Humensky, T. B.; Reyes, L. C.; Swordy, S. P.; Wakely, S. P.; Wissel, S. A.] Univ Coll Dublin, Sch Phys, Dublin 2, Ireland.
[Imran, A.; Krennrich, F.; Nagai, T.; Niemiec, J.; Pohl, M.; Schroedter, M.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
[Kaaret, P.; Pandel, D.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Kaaret, P.] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA.
[Reynolds, P. T.] Cork Inst Technol, Dept Appl Phys & Instrumentat, Cork, Ireland.
Max Planck Inst Extraterr Phys MPE, D-85748 Garching, Germany.
RP Acciari, VA (reprint author), Galway Mayo Inst Technol, Dept Life & Phys Sci, Dublin Rd, Galway, Ireland.
EM fortin@phys.columbia.edu
RI Hays, Elizabeth/D-3257-2012; Daniel, Michael/A-2903-2010;
OI Daniel, Michael/0000-0002-8053-7910; Ward, John E/0000-0003-1973-0794;
Pandel, Dirk/0000-0003-2085-5586
FU U.S. Department of Energy; U.S. National Science Foundation; Smithsonian
Institution; NSERC; PPARC; Science Foundation Ireland
FX This research is supported by grants from the U.S. Department of Energy,
the U.S. National Science Foundation, and the Smithsonian Institution,
by NSERC in Canada, by PPARC in the UK, and Science Foundation Ireland.
NR 41
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PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD APR 20
PY 2009
VL 695
IS 2
BP 1370
EP 1375
DI 10.1088/0004-637X/695/2/1370
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 430VS
UT WOS:000265018300054
ER
PT J
AU Carroll, JJ
Frank, A
Blackman, EG
Cunningham, AJ
Quillen, AC
AF Carroll, Jonathan J.
Frank, Adam
Blackman, Eric G.
Cunningham, Andrew J.
Quillen, Alice C.
TI OUTFLOW-DRIVEN TURBULENCE IN MOLECULAR CLOUDS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE ISM: jets and outflows; ISM: kinematics and dynamics; turbulence
ID STAR-FORMATION; MAGNETOHYDRODYNAMIC TURBULENCE; PROTOSTELLAR TURBULENCE;
NGC 1333; MODEL; DISSIPATION; STATISTICS; EVOLUTION; CAVITIES
AB In this paper, we explore the relationship between protostellar outflows and turbulence in molecular clouds. Using three-dimensional numerical simulations we focus on the hydrodynamics of multiple outflows interacting within a parsec scale volume. We explore the extent to which transient outflows injecting directed energy and momentum into a subvolume of a molecular cloud can be converted into random turbulent motions. We show that turbulence can readily be sustained by these interactions and it is possible to broadly characterize an effective driving scale of the outflows. We compare the velocity spectrum obtained in our studies with that of isotropically forced hydrodynamic turbulence finding that in outflow-driven turbulence a power law of the form E(k) proportional to k(-beta) is indeed achieved. However, we find that a steeper spectrum beta similar to 2.74 is obtained in outflow-driven turbulence models than in isotropically forced simulations beta similar to 2.45. We discuss possible physical mechanisms responsible for these results as well as their implications for turbulence in molecular clouds where outflows will act in concert with other processes such as gravitational collapse.
C1 [Carroll, Jonathan J.; Frank, Adam; Blackman, Eric G.; Cunningham, Andrew J.; Quillen, Alice C.] Univ Rochester, Dept Phys & Astron, Rochester, NY 14620 USA.
[Cunningham, Andrew J.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Carroll, JJ (reprint author), Univ Rochester, Dept Phys & Astron, Rochester, NY 14620 USA.
EM johannjc@pas.rochester.edu
FU NASA [20269]; National Science Foundation [AST0406823, AST-0507519,
PHY-0552695]; Space Telescope Science Institute [HST-AR10972,
HST-AR-11250, HST-AR-11252]; DOE Cooperative Agreement
[DE-FC03-02NA00057]
FX We thank Chris Matzner, Chris McKee, and Mordecai-Mark Mac Low for
extremely useful discussions as well as the referee for their insightful
criticisms and helpful suggestions. Hector Arce, John Bally, Pat
Hartigan, and Tom Ray were also generous with their time. Tim Dennis,
Kris Yirak, Brandon Schroyer, and Mike Laski provided invaluable support
and help. Support for this work was in part provided by NASA through
awards issued by JPL/Caltech through Spitzer program 20269, the National
Science Foundation through grants AST0406823, AST-0507519, and
PHY-0552695 as well as the Space Telescope Science Institute through
grants HST-AR10972, HST-AR-11250, and HST-AR-11252. We also thank the
University of Rochester Laboratory for Laser Energetics and funds
received through the DOE Cooperative Agreement DE-FC03-02NA00057.
NR 30
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PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD APR 20
PY 2009
VL 695
IS 2
BP 1376
EP 1381
DI 10.1088/0004-637X/695/2/1376
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 430VS
UT WOS:000265018300055
ER
PT J
AU Leggett, SK
Cushing, MC
Saumon, D
Marley, MS
Roellig, TL
Warren, SJ
Burningham, B
Jones, HRA
Kirkpatrick, JD
Lodieu, N
Lucas, PW
Mainzer, AK
Martin, EL
McCaughrean, MJ
Pinfield, DJ
Sloan, GC
Smart, RL
Tamura, M
Van Cleve, J
AF Leggett, S. K.
Cushing, Michael C.
Saumon, D.
Marley, M. S.
Roellig, T. L.
Warren, S. J.
Burningham, Ben
Jones, H. R. A.
Kirkpatrick, J. D.
Lodieu, N.
Lucas, P. W.
Mainzer, A. K.
Martin, E. L.
McCaughrean, M. J.
Pinfield, D. J.
Sloan, G. C.
Smart, R. L.
Tamura, M.
Van Cleve, J.
TI THE PHYSICAL PROPERTIES OF FOUR similar to 600 K T DWARFS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE stars: atmospheres; stars: individual (ULAS J003402.77-005206.7, ULAS
J133553.45+113005.2, 2MASS J09393548-2448279, CFBD J005910.82-011401.3);
stars: low-mass, brown dwarfs
ID SPITZER-SPACE-TELESCOPE; EXOPLANET HOST STAR; DIGITAL SKY SURVEY; BROWN
DWARF; SPECTRAL CLASSIFICATION; CHEMICAL-EQUILIBRIUM; ULTRACOOL DWARFS;
GLIESE 229B; PHOTOMETRY; 2MASS
AB We present Spitzer 7.6-14.5 mu m spectra of ULAS J003402.77-005206.7 and ULAS J133553.45+113005.2, two T9 dwarfs with the latest spectral types currently known. We fit synthetic spectra and photometry to the near-through mid-infrared energy distributions of these dwarfs and that of the T8 dwarf 2MASS J09393548-2448279. We also analyze near-infrared data for another T9, CFBD J005910.82-011401.3. We find that the ratio of the mid-to near-infrared fluxes is very sensitive to effective temperature at these low temperatures, and that the 2.2 mu m and 4.5 mu m fluxes are sensitive to metallicity and gravity; increasing gravity has a similar effect to decreasing metallicity, and vice versa, and there is a degeneracy between these parameters. The 4.5 mu m and 10 mu m fluxes are also sensitive to vertical transport of gas through the atmosphere, which we find to be significant for these dwarfs. The full near-through mid-infrared spectral energy distribution allows us to constrain the effective temperature (K)/gravity (ms(2))/metallicity ([m/H] dex) of ULAS J0034-00 and ULAS J1335+11 to 550-600/100-300/0.0-0.3 and 500-550/100-300/0.0-0.3, respectively. These fits imply low masses and young ages for the dwarfs of 5-20 M(Jupiter) and 0.1-2 Gyr. The fits to 2MASS J0939-24 are in good agreement with the measured distance, the observational data, and the earlier T8 near-infrared spectral type if it is a slightly metal-poor 4-10 Gyr old system consisting of a 500 K and 700 K, similar to 25 M(Jupiter) and similar to 40 M(Jupiter), pair, although it is also possible that it is an identical pair of 600 K, 30 M(Jupiter), dwarfs. As no mid-infrared data are available for CFBD J0059-01 its properties are less well constrained; nevertheless it appears to be a 550-600 K dwarf with g = 300-2000 ms(-2) and [m/H] = 0-0.3 dex. These properties correspond to mass and age ranges of 10-50 M(Jupiter) and 0.5-10 Gyr for this dwarf.
C1 [Leggett, S. K.] Gemini Observ, Hilo, HI 96720 USA.
[Cushing, Michael C.] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.
[Saumon, D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Marley, M. S.; Roellig, T. L.] NASA, Ames Res Ctr, Moffett Field, CA 94305 USA.
[Warren, S. J.] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2AZ, England.
[Burningham, Ben; Jones, H. R. A.; Lucas, P. W.; Pinfield, D. J.] Univ Hertfordshire, Sci & Technol Res Inst, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England.
[Kirkpatrick, J. D.] CALTECH, IPAC, Pasadena, CA 91125 USA.
[Lodieu, N.; Martin, E. L.] Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain.
[Mainzer, A. K.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
[Martin, E. L.] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA.
[McCaughrean, M. J.] Univ Exeter, Sch Phys, Exeter EX4 4QL, Devon, England.
[Sloan, G. C.] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA.
[Smart, R. L.] Osserv Astron Torino, INAF, I-10025 Pino Torinese, TO, Italy.
[Tamura, M.] Natl Inst Nat Sci, Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan.
[Van Cleve, J.] Ball Aerosp & Technol Corp, Boulder, CO 80301 USA.
RP Leggett, SK (reprint author), Gemini Observ, 670 N Aohoku Pl, Hilo, HI 96720 USA.
EM sleggett@gemini.edu
RI Marley, Mark/I-4704-2013;
OI Burningham, Ben/0000-0003-4600-5627; Smart, Richard/0000-0002-4424-4766;
Jones, Hugh/0000-0003-0433-3665
FU NASA; Association of Universities for Research in Astronomy, Inc;
Spanish Ministry of Science [AYA2007-67458]
FX This work is based on observations made with the Spitzer Space
Telescope, which is operated by the Jet Propulsion Laboratory,
California Institute of Technology under a contract with NASA. Support
for this work was provided by NASA through an award issued by
JPL/Caltech. S.K.L.'s research is supported by the Gemini Observatory,
which is operated by the Association of Universities for Research in
Astronomy, Inc., on behalf of the international Gemini partnership of
Argentina, Australia, Brazil, Canada, Chile, the United Kingdom, and the
United States of America. E.L.M.'s research is supported by The Spanish
Ministry of Science via project AYA2007-67458.
NR 45
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PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD APR 20
PY 2009
VL 695
IS 2
BP 1517
EP 1526
DI 10.1088/0004-637X/695/2/1517
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 430VS
UT WOS:000265018300066
ER
PT J
AU Gosling, JT
McComas, DJ
Roberts, DA
Skoug, RM
AF Gosling, J. T.
McComas, D. J.
Roberts, D. A.
Skoug, R. M.
TI A ONE-SIDED ASPECT OF ALFVENIC FLUCTUATIONS IN THE SOLAR WIND
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE magnetic fields; plasmas; solar wind; turbulence; waves
ID TURBULENCE; WAVES; RECONNECTION; MODEL
AB Using Advanced Composition Explorer (ACE) 64 s data at 1 AU we find that Alfvenic fluctuations propagating outward from the Sun along the magnetic field, B, in the solar wind often produce one-sided variations in one of the equatorial components of Band velocity, V. This is a natural consequence of the fact that the Alfvenic fluctuations are transverse fluctuations in which |B| remains nearly constant. Thus, fluctuations in the field component that defines the underlying background field direction are always relative to a base value rather than to an average value. This suggests that conclusions derived from statistical analyses of fluctuations in the solar wind that assume the fluctuations in all field components are relative to average values need to be re-examined. We also find that discrete, sunward-propagating Alfvenic fluctuations or rotational discontinuities are extremely rare in the pristine solar wind; thus far we have identified such discrete events in ACE data only in association with events identified as magnetic reconnection exhausts and/or in association with backstreaming ions from reverse shocks, including Earth's bow shock.
C1 [Gosling, J. T.] Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80303 USA.
[McComas, D. J.] SW Res Inst, San Antonio, TX 78228 USA.
[Roberts, D. A.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Skoug, R. M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Gosling, JT (reprint author), Univ Colorado, Atmospher & Space Phys Lab, 1234 Innovat Dr, Boulder, CO 80303 USA.
EM jack.gosling@lasp.colorado.edu
FU NASA [NNG06GC27G]; NASA/ACE program
FX J. G. thanks A. Balogh, J. Borovsky, T. Horbury, B. Matthaeus, M.
Neugebauer, C. Smith, and M. Velli, for a number of stimulating
conversations on one or more of the topics of this paper, C. Smith for
use of the magnetometer data, and M. Desai for providing energetic
particle observations. This work has been supported by NASA grant
NNG06GC27G and the SWEPAM portion of the NASA/ACE program.
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PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD APR 20
PY 2009
VL 695
IS 2
BP L213
EP L216
DI 10.1088/0004-637X/695/2/L213
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 428TE
UT WOS:000264872100020
ER
PT J
AU Zhang, ZC
Helms, G
Clark, SB
Tian, GX
Zanonato, P
Rao, LF
AF Zhang, Zhicheng
Helms, Gregory
Clark, Sue B.
Tian, Guoxin
Zanonato, PierLuigi
Rao, Linfeng
TI Complexation of Uranium(VI) by Gluconate in Acidic Solutions: a
Thermodynamic Study with Structural Analysis
SO INORGANIC CHEMISTRY
LA English
DT Article
ID NUCLEAR MAGNETIC-RESONANCE; VARIABLE TEMPERATURES; DISSOCIATION
CONSTANTS; AQUEOUS-SOLUTION; NMR; PROTONATION; EQUILIBRIA;
ALUMINUM(III); COORDINATION; HYDROLYSIS
AB Within the pC(H) range of 2.5 to 4.2, gluconate forms three uranyl complexes UO(2)(GH4)(+), UO(2)(GH(3))(aq), and UO(2)(GH(3))(GH(4))(-), through the following reactions: (1) UO(2)(2+) + GH(4)(-) = UO(2)(GH(4))(+), (2) UO(2)(2+) + GH(4)(-) = UO(2)(GH(3))(aq) + H(+), and (3) UO(2)(2+) + 2GH(4)(-) = UO(2)(GH(3))(GH(4))(-) + H(+). Complexes were inferred from potentiometric, calorimetric, NMR, and EXAFS studies. Correspondingly, the stability constants and enthalpies were determined to be log beta(1) = 2.2 +/- 0.3 and Delta H(1) = 7.5 +/- 1.3 kJ mol(-1) for reaction (1), log beta(2) = -(0.38 +/- 0.05) and Delta H(2) = 15.4 +/- 0.3 kJ mol(-1) for reaction (2), and log beta(3) = 1.3 +/- 0.2 and Delta H(3) = 14.6 +/- 0.3 kJ mol(-1) for reaction (3), at I = 1.0 M NaClO(4) and t = 25 degrees C. The UO(2)(GH(4))(+) complex forms through the bidentate carboxylate binding to U(VI). In the UO(2)(GH(3))(aq) complex, hydroxyl-deprotonated gluconate (GH(3)(2-)) coordinates to U(VI) through the five-membered ring chelation. For the UO(2)(GH(3))(GH(4))(-) complex, multiple coordination modes are suggested. These results are discussed in the context of trivalent and pentavalent actinide complexation by gluconate.
C1 [Zhang, Zhicheng; Clark, Sue B.] Washington State Univ, Dept Chem, Pullman, WA 99164 USA.
[Helms, Gregory] Washington State Univ, Ctr NMR Spect, Pullman, WA 99164 USA.
[Zhang, Zhicheng; Tian, Guoxin; Zanonato, PierLuigi; Rao, Linfeng] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Zanonato, PierLuigi] Univ Padua, Dipartimento Sci Chim, I-35131 Padua, Italy.
RP Clark, SB (reprint author), Washington State Univ, Dept Chem, Pullman, WA 99164 USA.
EM s_clark@wsu.edu; lrao@lbl.gov
RI Zhang, Zhicheng/B-3887-2010
FU U.S. DOE's Environmental Management Science Program; U.S. Department of
Energy; Basic Energy Sciences; Heavy Elements program
[DE-FG02-06ER15782]; DOE [DE-FG07-07ID14896]; U.S. Department of Energy,
Office of Science; Office of Basic Energy Sciences [DE-AC02-05CH11231]
FX At Washington State University, this work was supported primarily by
U.S. DOE's Environmental Management Science Program. S.B.C., Z.Z., and
G.H. also acknowledge support from the U.S. Department of Energy, Basic
Energy Sciences, Heavy Elements program, contract DE-FG02-06ER15782 for
the NMR studies. S.B.C. and Z.Z. also acknowledge support from DOE via
contract number DE-FG07-07ID14896 while preparing this manuscript. The
work performed at Lawrence Berkeley National Laboratory (LBNL) was
supported by U.S. Department of Energy, Office of Science, Office of
Basic Energy Sciences under Contract No. DE-AC02-05CH11231 at LBNL. The
EXAFS experiments were conducted at SSRL, which is operated by the
Department of Energy, Division of Chemical Science. Special thanks are
due to Drs. Corwin Booth and Wayne Lukens (LBNL) for their help on the
EXAFS analyses in this work.
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PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0020-1669
J9 INORG CHEM
JI Inorg. Chem.
PD APR 20
PY 2009
VL 48
IS 8
BP 3814
EP 3824
DI 10.1021/ic8018925
PG 11
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 432WZ
UT WOS:000265166300054
PM 19320439
ER
PT J
AU Raza, N
Sial, S
Siddiqi, SS
Lookman, T
AF Raza, Nauman
Sial, Sultan
Siddiqi, Shahid S.
Lookman, Turab
TI Energy minimization related to the nonlinear Schrodinger equation
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE Sobolev gradients; Nonlinear Schrodinger equation
ID SOBOLEV GRADIENTS
AB In this the window of the Sobolev gradient technique to the problem of minimizing a Schrodinger functional associated with a nonlinear Schrodinger equation. We show that gradients act in a suitably chosen Sobolev space (Sobolev gradients) can be used in finite-difference and finite-element settings in a computationally efficient way to find minimum energy states of Schrodinger functionals. (C) 2008 Elsevier Inc. All rights reserved.
C1 [Raza, Nauman; Siddiqi, Shahid S.] Univ Punjab, Dept Math, Lahore, Pakistan.
[Raza, Nauman] Lahore Univ Management Sci, Lahore, Pakistan.
[Sial, Sultan] Lahore Univ Managernent Sci, DHA, Dept Math, Lahore Cantt 54792, Pakistan.
[Lookman, Turab] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Raza, N (reprint author), Univ Punjab, Dept Math, House 15,St 39, Lahore, Pakistan.
EM raza_nauman@yahoo.com; sultans@lums.edu.pk;
shahidsiddiqiprof@yahoo.co.uk
OI Lookman, Turab/0000-0001-8122-5671
FU Higher Education Commission Islamabad, Pakistan
FX We acknowledge the enabling role of the Higher Education Commission
Islamabad, Pakistan, and appreciate its financial support through the
Indigenous PhD 5000 Fellowship Program Batch-I.
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PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9991
J9 J COMPUT PHYS
JI J. Comput. Phys.
PD APR 20
PY 2009
VL 228
IS 7
BP 2572
EP 2577
DI 10.1016/j.jcp.2008.12.016
PG 6
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 420LS
UT WOS:000264291900014
ER
PT J
AU Archibald, R
Gelb, A
Saxena, R
Xiu, DB
AF Archibald, Rick
Gelb, Anne
Saxena, Rishu
Xiu, Dongbin
TI Discontinuity detection in multivariate space for stochastic simulations
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE Stochastic partial differential equations; Multivariate edge detection;
Generalized polynomial chaos method
ID DIFFERENTIAL-EQUATIONS; POLYNOMIAL CHAOS; EDGE-DETECTION
AB Edge detection has traditionally been associated with detecting physical space jump discontinuities in one dimension, e.g. seismic signals, and two dimensions, e.g. digital images. Hence most of the research on edge detection algorithms is restricted to these contexts. High dimension edge detection can be of significant importance. however. For instance, stochastic variants of classical differential equations not only have variables in space/time dimensions, but additional dimensions are often introduced to the problem by the nature of the random inputs. The stochastic solutions to such problems sometimes contain discontinuities in the corresponding random space and a prior knowledge of jump locations can be very helpful in increasing the accuracy of the final solution. Traditional edge detection methods typically require uniform grid point distribution. They also often involve the computation of gradients and/or Laplacians, which can become very complicated to compute as the number of dimensions increases. The polynomial annihilation edge detection method, on the other hand, is more flexible in terms of its geometric specifications and is furthermore relatively easy to apply. This paper discusses the numerical implementation of the polynomial annihilation edge detection method to high dimensional functions that arise when solving stochastic partial differential equations. (C) 2009 Elsevier Inc. All rights reserved.
C1 [Archibald, Rick] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Gelb, Anne; Saxena, Rishu] Arizona State Univ, Dept Math & Stat, Tempe, AZ 85287 USA.
[Xiu, Dongbin] Purdue Univ, Dept Math, W Lafayette, IN 47907 USA.
RP Archibald, R (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM ArchibaldRK@ORNL.gov; ag@math.asu.edu; saxena@mathpost.asu.edu;
dxiu@math.purdue.edu
RI Archibald, Rick/I-6238-2016
OI Archibald, Rick/0000-0002-4538-9780
FU U.S. Government [DE-AC05-00OR22725]; NSF [DMS-0510813, DMS-0652833,
RUI-0608844, DMS-0421846, DMS-0645035]; AFOSR [FA9550-08-1-0353, DOE
DE-FC52-08NA28617]
FX The submitted manuscript has been authored by contractors [UT-Battelle
LLC, manager of Oak Ridge National Laboratory (ORNL)] of the U.S.
Government under Contract No. DE-AC05-00OR22725. Accordingly, the U.S.
Government retains a nonexclusive, royalty-free license to publish or
reproduce the published form of this contribution, or allow others to do
so, for U.S. Government purposes. Anne Gelb was partially supported by
NSF DMS-0510813, NSF FRG DMS-0652833, NSF RUI-0608844 and NSF SCREMS
DMS-0421846. Dongbin Xiu was partially supported by AFOSR
FA9550-08-1-0353, DOE DE-FC52-08NA28617 and NSF CAREER DMS-0645035.
NR 22
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PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9991
J9 J COMPUT PHYS
JI J. Comput. Phys.
PD APR 20
PY 2009
VL 228
IS 7
BP 2676
EP 2689
DI 10.1016/j.jcp.2009.01.001
PG 14
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 420LS
UT WOS:000264291900022
ER
PT J
AU Aaltonen, T
Adelman, J
Akimoto, T
Gonzalez, BA
Amerio, S
Amidei, D
Anastassov, A
Annovi, A
Antos, J
Apollinari, G
Apresyan, A
Arisawa, T
Artikov, A
Ashmanskas, W
Attal, A
Aurisano, A
Azfar, F
Badgett, W
Barbaro-Galtieri, A
Barnes, VE
Barnett, BA
Barria, P
Bartsch, V
Bauer, G
Beauchemin, PH
Bedeschi, F
Beecher, D
Behari, S
Bellettini, G
Bellinger, J
Benjamin, D
Beretvas, A
Beringer, J
Bhatti, A
Binkley, M
Bisello, D
Bizjak, I
Blair, RE
Blocker, C
Blumenfeld, B
Bocci, A
Bodek, A
Boisvert, V
Bolla, G
Bortoletto, D
Boudreau, J
Boveia, A
Brau, B
Bridgeman, A
Brigliadori, L
Bromberg, C
Brubaker, E
Budagov, J
Budd, HS
Budd, S
Burke, S
Burkett, K
Busetto, G
Bussey, P
Buzatu, A
Byrum, KL
Cabrera, S
Calancha, C
Campanelli, M
Campbell, M
Canelli, F
Canepa, A
Carls, B
Carlsmith, D
Carosi, R
Carrillo, S
Carron, S
Casal, B
Casarsa, M
Castro, A
Catastini, P
Cauz, D
Cavaliere, V
Cavalli-Sforza, M
Cerri, A
Cerrito, L
Chang, SH
Chen, YC
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Chlachidze, G
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Cho, K
Chokheli, D
Chou, JP
Choudalakis, G
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Compostella, G
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Almenar, CC
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Dagenhart, D
Datta, M
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Derwent, PF
Di Canto, A
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Di Ruzza, B
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TI Measurement of W-boson helicity fractions in top-quark decays using cos
theta
SO PHYSICS LETTERS B
LA English
DT Article
DE Helicity; W boson; Top quark
ID SEMILEPTONIC DECAYS; QCD CORRECTIONS; NEUTRINO; PHYSICS
AB Fully reconstructed a t (t) over bar -> W(+)bW(-)(b) over bar -> l nu q (q) over bar 'b (b) over bar events are used to determine the fractions of right-handed (f(+)) and longitudinally polarized (f(0)) W bosons produced in top-quark decays. The helicity fractions are sensitive to the couplings and the Dirac structure of the Wtb vertex. This Letter reports measurements of the W-boson helicity fractions from two different methods using data corresponding to an integrated luminosity of 1.9 fb(-1) of pp collisions at a center-of-mass energy of 1.96 TeV collected by the CDF II detector operating at the Fermilab Tevatron. Combining the results from the two methods, we find f(0) = 0.62 +/- 0.10(stat) +/- 0.05(syst) under the assumption that f(+) = 0, and f(+) = -0.04 +/- 0.04(stat) +/- 0.03(syst) with f(0) fixed to the theoretically expected value of 0.70. Model-independent fits are also performed and simultaneously determine f(0) =0.66 +/- 0.16(stat) +/- 0.05(syst) and f(+) = -0.03 +/- 0.06(stat) +/- 0.03(syst). All these results are consistent with standard model expectations. (C) 2009 Elsevier B.V. All rights reserved.
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[Akimoto, T.; Hara, K.; Kim, S. H.; Kimura, N.; Kubo, T.; Kurata, M.; Maruyama, T.; Masubuchi, T.; Miyake, H.; Nagai, Y.; Nagano, A.; Naganoma, J.; Nakamura, K.; Shimojima, M.; Suzuki, T.; Takeuchi, Y.; Tomura, T.; Ukegawa, F.] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan.
[Aurisano, A.; Elagin, A.; Kamon, T.; Khotilovich, V.; Lee, E.; Lee, S. W.; McIntyre, P.; Safonov, A.; Toback, D.; Weinberger, M.] Texas A&M Univ, College Stn, TX 77843 USA.
[Chuang, S. H.; Dube, S.; Halkiaclakis, E.; Hare, D.; Lath, A.; Somalwar, S.] Rutgers State Univ, Piscataway, NJ 08855 USA.
[Cauz, D.; Di Ruzza, B.; Giordani, M.; Pauletta, G.; Penzo, A.; Rossi, M.; Santi, L.; Totaro, P.; Zanetti, A.] Ist Nazl Fis Nucl Trieste Udine, I-34100 Trieste, Italy.
[Cauz, D.; Di Ruzza, B.; Giordani, M.; Pauletta, G.; Penzo, A.; Rossi, M.; Santi, L.; Totaro, P.; Zanetti, A.] Univ Trieste Udine, I-33100 Udine, Italy.
[Bhatti, A.; Demortier, L.; Goulianos, K.; Hatakeyama, K.; Lungu, G.; Mesropian, C.; Terashi, K.] Rockefeller Univ, New York, NY 10021 USA.
[Bodek, A.; Boisvert, V.; Budd, H. S.; Chung, Y. S.; de Barbaro, P.; Gimmell, J. L.; Han, B. -Y.; Han, J. Y.; McFarland, K. S.; Sakumoto, W. K.; Yu, G. B.] Univ Rochester, Rochester, NY 14627 USA.
[Apresyan, A.; Barnes, V. E.; Bolla, G.; Bortoletto, D.; Flanagan, G.; Garfinkel, A. F.; Jones, M.; Laasanen, A. T.; Margaroli, F.; Merkel, P.; Ranjan, N.; Sedov, A.] Purdue Univ, W Lafayette, IN 47907 USA.
[Boudreau, J.; Gibson, K.; Hartz, M.; Liu, C.; Rahaman, A.; Shepard, P. F.] Univ Pittsburgh, Pittsburgh, PA 15260 USA.
[Canepa, A.; Heijboer, A.; Heinrich, J.; Keung, J.; Kroll, J.; Lipeles, E.; Lockyer, N. S.; Neu, C.; Pianori, E.; Rodriguez, T.; Thomson, E.; Tu, Y.; Wagner, P.; Whiteson, D.; Williams, H. H.] Univ Penn, Philadelphia, PA 19104 USA.
[De Cecco, S.; Dionisi, C.; Gallinaro, M.; Giagu, S.; Iori, M.; Luci, C.; Mastrandrea, P.; Rescigno, M.; Sarkar, S.; Zanello, L.] Univ Roma La Sapienza, I-00185 Rome, Italy.
[De Cecco, S.; Dionisi, C.; Gallinaro, M.; Giagu, S.; Iori, M.; Luci, C.; Mastrandrea, P.; Rescigno, M.; Sarkar, S.; Zanello, L.] Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, Italy.
[Barria, P.; Bedeschi, F.; Bellettini, G.; Carosi, R.; Catastini, P.; Cavaliere, V.; Chiarelli, G.; Ciocci, M. A.; Crescioli, F.; Dell'Orso, M.; Di Canto, A.; Donati, S.; Ferrazza, C.; Garosi, P.; Giannetti, R.; Giunta, M.; Introzzi, G.; Lami, S.; Latino, G.; Leone, S.; Menzione, A.; Morello, M. J.; Piacentino, G.; Punzi, G.; Ristori, L.; Sartori, L.; Scribano, A.; Scuri, F.; Sforza, F.; Squillacioti, P.; Trovato, M.; Turini, N.; Vataga, E.; Volpi, G.] Univ Siena, Univ Pisa, Ist Nazl Fis Nucl Pisa, I-56127 Pisa, Italy.
[Barria, P.; Bedeschi, F.; Bellettini, G.; Carosi, R.; Catastini, P.; Cavaliere, V.; Chiarelli, G.; Ciocci, M. A.; Crescioli, F.; Dell'Orso, M.; Di Canto, A.; Donati, S.; Ferrazza, C.; Garosi, P.; Giannetti, R.; Giunta, M.; Introzzi, G.; Lami, S.; Latino, G.; Leone, S.; Menzione, A.; Morello, M. J.; Piacentino, G.; Punzi, G.; Ristori, L.; Sartori, L.; Scribano, A.; Scuri, F.; Sforza, F.; Squillacioti, P.; Trovato, M.; Turini, N.; Vataga, E.; Volpi, G.] Scuola Normale Super Pisa, I-56127 Pisa, Italy.
[Amidei, D.; Campbell, M.; Cully, J. C.; Gerdes, D.; Strycker, G. L.; Tecchio, M.; Varganov, A.; Wright, T.] Univ Michigan, Ann Arbor, MI 48109 USA.
[Kato, Y.; Okusawa, T.; Seiya, Y.; Wakisaka, T.; Yamamoto, K.; Yoshida, T.] Osaka City Univ, Osaka 588, Japan.
[Azfar, F.; Farrington, S.; Harper, S.; Hays, C.; Huffman, B. T.; Linacre, J.; Lyons, L.; Malde, S.; Oakes, L.; Pounder, N.; Rademacker, J.; Renton, P.] Univ Oxford, Oxford OX1 3RH, England.
[Amerio, S.; Bisello, D.; Busetto, G.; Compostella, G.; Cortiana, G.; Donini, J.; Dorigo, T.; Gresele, A.; Lazzizzera, I.; Loreti, M.; Lucchesi, D.; Griso, S. Pagan] Univ Padua, I-35131 Padua, Italy.
[Amerio, S.; Bisello, D.; Busetto, G.; Compostella, G.; Cortiana, G.; Donini, J.; Dorigo, T.; Gresele, A.; Lazzizzera, I.; Loreti, M.; Lucchesi, D.; Griso, S. Pagan] Ist Nazl Fis Nucl, Sez Padova Trento, I-35131 Padua, Italy.
[Ciobanu, C. I.; di Giovanni, G. P.; Savoy-Navarro, A.; Tourneur, S.] Univ Paris 06, CNRS, IN2P3, LPNHE,UMR7585, F-75252 Paris, France.
[Nakano, I.; Takashima, R.; Tanaka, R.] Okayama Univ, Okayama 7008530, Japan.
[Efron, J.; Hughes, R. E.; Lannon, K.; Parks, B.; Slaunwhite, J.; Winer, B. L.] Ohio State Univ, Columbus, OH 43210 USA.
[Anastassov, A.; Schmitt, M.; Stentz, D.] Northwestern Univ, Evanston, IL 60208 USA.
[Gold, M.; Gorelov, I.; Seidel, S.; Strologas, J.; Vogel, M.] Univ New Mexico, Albuquerque, NM 87131 USA.
[Shreyber, I.] Inst Theoret & Expt Phys, ITEP, Moscow 117259, Russia.
[Bromberg, C.; Campanelli, M.; Gunay-Unalan, Z.; Hussein, M.; Huston, J.; Miller, R.; Sorin, V.; Tollefson, K.] Michigan State Univ, E Lansing, MI 48824 USA.
[Bartsch, V.; Beecher, D.; Bizjak, I.; Cerrito, L.; Lancaster, M.; Malik, S.; Nurse, E.; Vine, T.; Waters, D.] UCL, London WC1E 6BT, England.
[Houlden, M.; Manca, G.; McNulty, R.; Mehta, A.; Shears, T.] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England.
[Barbaro-Galtieri, A.; Beringer, J.; Cerri, A.; Deisher, A.; Fang, H. C.; Haber, C.; Hsu, S. -C.; Lin, C. -S.; Lujan, P.; Lys, J.; Muelmenstaedt, J.; Nielsen, J.; Volobouev, I.; Yao, W. M.] Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Bauer, G.; Choudalakis, G.; Gomez-Ceballos, G.; Goncharov, M.; Hahn, K.; Henderson, C.; Knuteson, B.; Makhoul, K.; Paus, C.; Xie, S.] MIT, Cambridge, MA 02139 USA.
[Beauchemin, P-H.; Buzatu, A.; Carron, S.; MacQueen, D.; Pashapour, S.; Roy, P.; Sinervo, P.; Snihur, R.; Spreitzer, T.; Stelzer, B.; Stelzer-Chilton, O.; Warburton, A.; Williams, G.] McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada.
[Beauchemin, P-H.; Buzatu, A.; Carron, S.; MacQueen, D.; Pashapour, S.; Roy, P.; Sinervo, P.; Snihur, R.; Spreitzer, T.; Stelzer, B.; Stelzer-Chilton, O.; Warburton, A.; Williams, G.] Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada.
[Beauchemin, P-H.; Buzatu, A.; Carron, S.; MacQueen, D.; Pashapour, S.; Roy, P.; Sinervo, P.; Snihur, R.; Spreitzer, T.; Stelzer, B.; Stelzer-Chilton, O.; Warburton, A.; Williams, G.] Univ Toronto, Toronto, ON M5S 1A7, Canada.
[Beauchemin, P-H.; Buzatu, A.; Carron, S.; MacQueen, D.; Pashapour, S.; Roy, P.; Sinervo, P.; Snihur, R.; Spreitzer, T.; Stelzer, B.; Stelzer-Chilton, O.; Warburton, A.; Williams, G.] TRIUMF, Vancouver, BC V6T 2A3, Canada.
[Chang, S. H.; Cho, K.; Jeon, E. J.; Joo, K. K.; Jung, J. E.; Kim, D. H.; Kim, H. S.; Kim, H. W.; Kim, J. E.; Kim, S. B.; Kong, D. J.; Moon, C. S.; Oh, Y. D.; Suh, J. S.; Yang, Y. C.; Yu, I.] Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea.
[Chang, S. H.; Cho, K.; Jeon, E. J.; Joo, K. K.; Jung, J. E.; Kim, D. H.; Kim, H. S.; Kim, H. W.; Kim, J. E.; Kim, S. B.; Kong, D. J.; Moon, C. S.; Oh, Y. D.; Suh, J. S.; Yang, Y. C.; Yu, I.] Seoul Natl Univ, Seoul 151742, South Korea.
[Chang, S. H.; Cho, K.; Jeon, E. J.; Joo, K. K.; Jung, J. E.; Kim, D. H.; Kim, H. S.; Kim, H. W.; Kim, J. E.; Kim, S. B.; Kong, D. J.; Moon, C. S.; Oh, Y. D.; Suh, J. S.; Yang, Y. C.; Yu, I.] Sungkyunkwan Univ, Suwon 440746, South Korea.
[Chang, S. H.; Cho, K.; Jeon, E. J.; Joo, K. K.; Jung, J. E.; Kim, D. H.; Kim, H. S.; Kim, H. W.; Kim, J. E.; Kim, S. B.; Kong, D. J.; Moon, C. S.; Oh, Y. D.; Suh, J. S.; Yang, Y. C.; Yu, I.] Korea Inst Sci & Technol, Taejon 305806, South Korea.
[Chang, S. H.; Cho, K.; Jeon, E. J.; Joo, K. K.; Jung, J. E.; Kim, D. H.; Kim, H. S.; Kim, H. W.; Kim, J. E.; Kim, S. B.; Kong, D. J.; Moon, C. S.; Oh, Y. D.; Suh, J. S.; Yang, Y. C.; Yu, I.] Chonnam Natl Univ, Kwangju 500757, South Korea.
[Calancha, C.; Fernandez, J. P.; Gonzalez, O.; Martinez-Ballarin, R.; Redondo, I.; Ttito-Guzman, R.; Vidal, M.] Ctr Invest Energet Medioambientales & Tecnol, E-28040 Madrid, Spain.
RP Chwalek, T (reprint author), Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany.
EM chwalek@ekp.uni-karlsruhe.de
RI Gorelov, Igor/J-9010-2015; Canelli, Florencia/O-9693-2016; Lazzizzera,
Ignazio/E-9678-2015; Chiarelli, Giorgio/E-8953-2012; Scodellaro,
Luca/K-9091-2014; Grinstein, Sebastian/N-3988-2014; Paulini,
Manfred/N-7794-2014; Russ, James/P-3092-2014; unalan,
zeynep/C-6660-2015; vilar, rocio/P-8480-2014; Cabrera Urban,
Susana/H-1376-2015; Garcia, Jose /H-6339-2015; ciocci, maria agnese
/I-2153-2015; Cavalli-Sforza, Matteo/H-7102-2015; Muelmenstaedt,
Johannes/K-2432-2015; Introzzi, Gianluca/K-2497-2015; Warburton,
Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014; Lysak,
Roman/H-2995-2014; Moon, Chang-Seong/J-3619-2014; Ruiz,
Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco,
Sandro/B-1016-2012; manca, giulia/I-9264-2012; Amerio,
Silvia/J-4605-2012; Punzi, Giovanni/J-4947-2012; Annovi,
Alberto/G-6028-2012; Ivanov, Andrew/A-7982-2013; Hill,
Christopher/B-5371-2012
OI Robson, Aidan/0000-0002-1659-8284; Torre, Stefano/0000-0002-7565-0118;
Casarsa, Massimo/0000-0002-1353-8964; Vidal Marono,
Miguel/0000-0002-2590-5987; Latino, Giuseppe/0000-0002-4098-3502; iori,
maurizio/0000-0002-6349-0380; Lancaster, Mark/0000-0002-8872-7292;
Nielsen, Jason/0000-0002-9175-4419; Jun, Soon Yung/0000-0003-3370-6109;
Toback, David/0000-0003-3457-4144; Hays, Chris/0000-0003-2371-9723;
Farrington, Sinead/0000-0001-5350-9271; Gorelov,
Igor/0000-0001-5570-0133; Canelli, Florencia/0000-0001-6361-2117; Lami,
Stefano/0000-0001-9492-0147; Margaroli, Fabrizio/0000-0002-3869-0153;
Group, Robert/0000-0002-4097-5254; Lazzizzera,
Ignazio/0000-0001-5092-7531; Chiarelli, Giorgio/0000-0001-9851-4816;
Giordani, Mario/0000-0002-0792-6039; Scodellaro,
Luca/0000-0002-4974-8330; Grinstein, Sebastian/0000-0002-6460-8694;
Paulini, Manfred/0000-0002-6714-5787; Russ, James/0000-0001-9856-9155;
unalan, zeynep/0000-0003-2570-7611; ciocci, maria agnese
/0000-0003-0002-5462; Muelmenstaedt, Johannes/0000-0003-1105-6678;
Introzzi, Gianluca/0000-0002-1314-2580; Warburton,
Andreas/0000-0002-2298-7315; Moon, Chang-Seong/0000-0001-8229-7829;
Ruiz, Alberto/0000-0002-3639-0368; Punzi, Giovanni/0000-0002-8346-9052;
Annovi, Alberto/0000-0002-4649-4398; Ivanov, Andrew/0000-0002-9270-5643;
Hill, Christopher/0000-0003-0059-0779
FU US Department of Energy and National Science Foundation: Italian
Istituto Nazionale di Fisica Nucleare; Ministry of Education, Culture,
Sports, Science and Technology of Japan: Natural Sciences and
Engineering Research Council of Canada: National Science Council of the
Republic of China; Swiss National Science Foundation; A.P. Sloan
Foundation: Bundesministerium fur Bildung und Forschung, Germany: Korean
Science and Engineering Foundation and Korean Research Foundation;
Science and Technology Facilities Council and the Royal Society, UK:
Institut National de Physique Nucleaire et Physique des Particules/CNRS;
Russian Foundation for Basic Research; Ministerio de Ciencia e
Innovacion, and Programa Consolider-Ingenio 2010, Spain; Slovak R&D
Agency: Academy of Finland
FX We thank the Fermilab staff and the technical staffs of the
participating institutions for their vital contributions. This work was
supported by the US Department of Energy and National Science
Foundation: the Italian Istituto Nazionale di Fisica Nucleare; the
Ministry of Education, Culture, Sports, Science and Technology of Japan:
the Natural Sciences and Engineering Research Council of Canada: the
National Science Council of the Republic of China; the Swiss National
Science Foundation; the A.P. Sloan Foundation: the Bundesministerium fur
Bildung und Forschung, Germany: the Korean Science and Engineering
Foundation and the Korean Research Foundation; the Science and
Technology Facilities Council and the Royal Society, UK: the Institut
National de Physique Nucleaire et Physique des Particules/CNRS; the
Russian Foundation for Basic Research; the Ministerio de Ciencia e
Innovacion, and Programa Consolider-Ingenio 2010, Spain; the Slovak R&D
Agency: and the Academy of Finland.
NR 34
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PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
EI 1873-2445
J9 PHYS LETT B
JI Phys. Lett. B
PD APR 20
PY 2009
VL 674
IS 3
BP 160
EP 167
DI 10.1016/j.physletb.2009.02.040
PG 8
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 437FD
UT WOS:000265471000004
ER
PT J
AU Hurst, AM
Wu, CY
Becker, JA
Stoyer, MA
Pearson, CJ
Hackman, G
Schumaker, MA
Svensson, CE
Austin, RAE
Ball, GC
Bandyopadhyay, D
Barton, CJ
Boston, AJ
Boston, HC
Churchman, R
Cline, D
Colosimo, SJ
Cross, DS
Demand, G
Djongolov, M
Drake, TE
Garrett, PE
Gray-Jones, C
Green, KL
Grint, AN
Hayes, AB
Leach, KG
Kulp, WD
Lee, G
Lloyd, S
Maharaj, R
Martin, JP
Millar, BA
Mythili, S
Nelson, L
Nolan, PJ
Oxley, DC
Padilla-Rodal, E
Phillips, AA
Porter-Peden, M
Rigby, SV
Sarazin, F
Sumithrarachchi, CS
Triambak, S
Walker, PM
Williams, SJ
Wong, J
Wood, JL
AF Hurst, A. M.
Wu, C. Y.
Becker, J. A.
Stoyer, M. A.
Pearson, C. J.
Hackman, G.
Schumaker, M. A.
Svensson, C. E.
Austin, R. A. E.
Ball, G. C.
Bandyopadhyay, D.
Barton, C. J.
Boston, A. J.
Boston, H. C.
Churchman, R.
Cline, D.
Colosimo, S. J.
Cross, D. S.
Demand, G.
Djongolov, M.
Drake, T. E.
Garrett, P. E.
Gray-Jones, C.
Green, K. L.
Grint, A. N.
Hayes, A. B.
Leach, K. G.
Kulp, W. D.
Lee, G.
Lloyd, S.
Maharaj, R.
Martin, J. -P.
Millar, B. A.
Mythili, S.
Nelson, L.
Nolan, P. J.
Oxley, D. C.
Padilla-Rodal, E.
Phillips, A. A.
Porter-Peden, M.
Rigby, S. V.
Sarazin, F.
Sumithrarachchi, C. S.
Triambak, S.
Walker, P. M.
Williams, S. J.
Wong, J.
Wood, J. L.
TI Narrowing of the neutron sd-pf shell gap in Na-29
SO PHYSICS LETTERS B
LA English
DT Article
DE Coulomb excitation; ISOL; Reduced transition matrix element; Island of
inversion
ID BETA-DECAY; MODEL; ISOTOPES; NUCLEI; SODIUM
AB The wave-function composition for the low-lying states in Na-29 was explored by measuring their electromagnetic properties using the Coulomb-excitation technique. A beam of Na-29 ions, postaccelerated to 70 MeV, bombarded a Pd-110 target with a rate of up to 600 particles per second at the recently commissioned ISAC-II facility at TRIUMF. Six segmented HPGe clover detectors of the TIGRESS gamma-ray spectrometer were used to detect deexcitation gamma rays in coincidence with scattered or recoiling charged particles in the segmented silicon detector, BAMBINO. The reduced transition matrix element vertical bar < 5/2(1)(+)vertical bar vertical bar E2 vertical bar vertical bar 3/2(gs)(+)>vertical bar in Na-29 was derived to be 0.237(21) e b from the measured gamma-ray yields for both projectile and target. This first-time measured value is consistent with the most recent Monte Carlo shell-model calculation, indicating a significant admixture of both sd and pf components in the wave function, and also providing evidence for the narrowing of the neutron sd-pf shell gap from similar to 6 MeV for stable nuclei to similar to 3 MeV for Na-29. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Hurst, A. M.; Wu, C. Y.; Becker, J. A.; Stoyer, M. A.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Pearson, C. J.; Hackman, G.; Ball, G. C.; Bandyopadhyay, D.; Churchman, R.; Djongolov, M.; Lee, G.; Lloyd, S.; Maharaj, R.; Padilla-Rodal, E.; Williams, S. J.] TRIUMF, Vancouver, BC V6T 2A3, Canada.
[Schumaker, M. A.; Svensson, C. E.; Demand, G.; Garrett, P. E.; Green, K. L.; Leach, K. G.; Millar, B. A.; Phillips, A. A.; Sumithrarachchi, C. S.; Triambak, S.; Wong, J.] Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada.
[Austin, R. A. E.; Colosimo, S. J.] St Marys Univ, Dept Phys & Astron, Halifax, NS B3H 3C3, Canada.
[Barton, C. J.] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England.
[Boston, A. J.; Boston, H. C.; Gray-Jones, C.; Grint, A. N.; Nelson, L.; Nolan, P. J.; Oxley, D. C.; Rigby, S. V.] Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.
[Cline, D.; Hayes, A. B.] Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA.
[Cross, D. S.] Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada.
[Drake, T. E.] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada.
[Kulp, W. D.; Wood, J. L.] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA.
[Martin, J. -P.] Univ Montreal, Dept Phys, Montreal, PQ G1K 7P4, Canada.
[Mythili, S.] Univ British Columbia, Dept Phys, Vancouver, BC V6T 1Z1, Canada.
[Porter-Peden, M.; Sarazin, F.] Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA.
[Walker, P. M.] Univ Surrey, Dept Phys, Surrey GU2 7XH, England.
RP Hurst, AM (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM hurst10@llnl.gov
OI Leach, Kyle/0000-0002-4751-1698
FU DOE, LLNL [DE-AC52-07NA27344]; NSF; NSERC of Canada; STFC of the UK; NRC
of Canada
FX This work was supported by the DOE, LLNL Contract DE-AC52-07NA27344, the
NSF, the NSERC of Canada, and the STFC of the UK. TRIUMF receives
federal funding via a contribution agreement with the NRC of Canada. The
considerable effort of the operations staff at TRIUMF is gratefully
acknowledged. The authors would also like to thank Prof. B.A. Brown and
Dr. D.J. Millener for insightful discussions concerning the shell-model
calculations.
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PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD APR 20
PY 2009
VL 674
IS 3
BP 168
EP 171
DI 10.1016/j.physletb.2009.03.017
PG 4
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 437FD
UT WOS:000265471000005
ER
PT J
AU Fernandez, CA
Bekhazi, JG
Hoppes, EM
Wiacek, RJ
Fryxell, GE
Bays, JT
Warner, MG
Wang, CM
Hutchison, JE
Addleman, RS
AF Fernandez, Carlos A.
Bekhazi, Jacky G.
Hoppes, Emily M.
Wiacek, Robert J.
Fryxell, Glen E.
Bays, J. Timothy
Warner, Marvin G.
Wang, Chongmin
Hutchison, James E.
Addleman, R. Shane
TI Advancements Toward the Greener Processing of Engineered Nanomaterials -
Effect of Core Size on the Dispersibility and Transport of Gold
Nanocrystals in Near-Critical Solvents
SO SMALL
LA English
DT Article
DE dispersibility; gold; near critical solvents; nanoparticles;
supercritical fluids
ID SUPERCRITICAL CARBON-DIOXIDE; STERIC STABILIZATION; METAL NANOPARTICLES;
SOLUBILITIES; LIQUID; CO2; SIMULATION; SOLVATION; PARTICLES; ETHANE
AB The ability to process and purify engineered nanomaterials using near critical or supercritical fluids (NcFs or ScFs) has enormous potential for the application at various stages of the development of green nanomaterial. The dispersibility of octanethiol-stabilized gold nanocrystals of different core sizes is explored, which were chosen to serve as model nanomaterials of general interest in compressed ethane and propane over a wide range of fluid conditions. Both solvents have enormous potential for the environmentally benign processing and transport of engineered nanomaterial due to their nominal toxicity and high degree of tunability and processability that can essentially eliminate solvent waste. The dispersibility is determined by measuring the absorption spectra of dispersions of various sizes of nanocrystals in NcFs. To beter understand the obtained results three models, the total interaction theory, the sedimentation coefficient equation, and the Chrastil method, are discussed. Nanoparticle dispersibility versus density plots are strongly dependent on nanoparticle size and solvent conditions, with the dispersion of larger nanocrystals more dependent on changes of pressure or density at a given temperature. For the range of nanoparticle sizes studies, compressed ehtane at 25 degrees C leads to a greater tunability of nanoparticle dispersion when compared with compressed propane at 65 degrees C. For equivalent pressures, compressed propane is found to provide better solubility than ethane due to its higher density. The results quantitatively demonstrate that NcFs can offer pressure-tunable, size-selective control of nanoparticle solvation and transport at easily obtainable temperature and pressure conditions. These capabilities provide clear advantages over conventional solvents and direct application to various nanomaterials processes, such as synthesis, separation, transport, and purification of nanocrystals.
C1 [Fernandez, Carlos A.; Bekhazi, Jacky G.; Hoppes, Emily M.; Wiacek, Robert J.; Fryxell, Glen E.; Bays, J. Timothy; Warner, Marvin G.; Wang, Chongmin; Addleman, R. Shane] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Hutchison, James E.] Univ Oregon, Inst Mat Sci, Eugene, OR 97403 USA.
RP Addleman, RS (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA.
EM Raymond.Addleman@pnl.gov
FU Safer Nonomaterials Nanomanufacturing Initiative (SNNI); Oregon
Nonoscience and Micro technologies Institute (ONAMI); Pacific Northwest
National Laboratory; US Department of Energy by Battelle [DE-AC06-67RLO
1830]; Deportment of Energy's Office of Biological
FX Funding for this work was provided by the Safer Nonomaterials
Nanomanufacturing Initiative (SNNI) of the Oregon Nonoscience and Micro
technologies Institute (ONAMI) and Pacific Northwest National
Laboratory. The Pacific Northwest Notional Laboratory is operated for
the US Department of Energy by Battelle under contract DE-AC06-67RLO
1830. A portion of this research was performed using EMSL, a national
scientific user facility sponsored by the Deportment of Energy's Office
of Biological and Environmental Research located at Pacific Northwest
National Laboratory.
NR 45
TC 5
Z9 5
U1 0
U2 16
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 1613-6810
J9 SMALL
JI Small
PD APR 20
PY 2009
VL 5
IS 8
BP 961
EP 969
DI 10.1002/smll.200801207
PG 9
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 442VH
UT WOS:000265868200011
PM 19242951
ER
PT J
AU Birn, J
Hesse, M
Schindler, K
Zaharia, S
AF Birn, J.
Hesse, M.
Schindler, K.
Zaharia, S.
TI Role of entropy in magnetotail dynamics
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID COLLISIONLESS MAGNETIC RECONNECTION; THIN CURRENT SHEETS; PLASMA SHEET;
EARTHS MAGNETOTAIL; ELECTRON DISSIPATION; FLUX TUBES; CONVECTION;
BUBBLES; BALANCE; FLOWS
AB The role of entropy conservation and loss in magnetotail dynamics, particularly in relation to substorm phases, is discussed on the basis of MHD theory and simulations, using comparisons with particle-in-cell (PIC) simulations for validation. Entropy conservation appears to be a crucial element leading to the formation of thin embedded current sheets in the late substorm growth phase and the potential loss of equilibrium. Entropy conservation also governs the accessibility of final states of evolution and the amount of energy that may be released. Entropy loss (in the form of plasmoids) is essential in the earthward transport of flux tubes (bubbles, bursty bulk flows). Entropy loss also changes the tail stability properties and may render ballooning modes unstable and thus contribute to cross-tail variability. We illustrate these effects through results from theory and simulations.
C1 [Birn, J.; Zaharia, S.] Los Alamos Natl Lab, Space Sci & Applicat Grp, Los Alamos, NM 87545 USA.
[Hesse, M.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Schindler, K.] Ruhr Univ Bochum, Inst Theoret Phys, D-44780 Bochum, Germany.
RP Birn, J (reprint author), Los Alamos Natl Lab, Space Sci & Applicat Grp, POB 1663, Los Alamos, NM 87545 USA.
EM jbirn@lanl.gov
RI Hesse, Michael/D-2031-2012; NASA MMS, Science Team/J-5393-2013
OI NASA MMS, Science Team/0000-0002-9504-5214
FU NASA Goddard Space Flight Center; NASA's Heliophysics Theory Program
FX This work was performed under the auspices of the U. S. Department of
Energy, supported by a grant from NASA Goddard Space Flight Center and
by NASA's Heliophysics Theory Program.; Wolfgang Baumjohann thanks the
reviewers for their assistance in evaluating this paper.
NR 38
TC 41
Z9 42
U1 0
U2 5
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD APR 18
PY 2009
VL 114
AR A00D03
DI 10.1029/2008JA014015
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 435GN
UT WOS:000265332200005
ER
PT J
AU Kyratsi, T
Kika, I
Hatzikraniotis, E
Paraskevopoulos, KM
Chrissafis, K
Kanatzidis, MG
AF Kyratsi, Th.
Kika, I.
Hatzikraniotis, E.
Paraskevopoulos, K. M.
Chrissafis, K.
Kanatzidis, M. G.
TI Synthetic conditions and their doping effect on beta-K2Bi8Se13
SO JOURNAL OF ALLOYS AND COMPOUNDS
LA English
DT Article
DE Thermoelectric materials; Chemical synthesis
ID SOLID-STATE CHEMISTRY; THERMOELECTRIC PROPERTIES; CRYSTALS;
CHALCOGENIDES
AB In this work the synthetic conditions for K2Bi8Se13 and their effect on its thermoelectric properties were investigated. K2Bi8Se13 was prepared as a single phase using K2Se and Bi2Se3 as starting materials in a furnace or via a reaction using direct flame, followed by remelting or annealing. Seebeck coefficient measurements showed that the doping level in the material is sensitive to the synthetic conditions. Higher synthesis temperatures as well as the flame reaction technique followed by annealing gave more homogenous samples with higher Seebeck coefficient. IR optical spectroscopic measurements showed a wide range of doping level achieved among the different synthetic conditions. These findings suggest that synthetic conditions can act as a useful tool for the optimization of the thermoelectric properties of these materials. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Kyratsi, Th.; Kika, I.] Univ Cyprus, Dept Mech & Mfg Engn, CY-1678 Nicosia, Cyprus.
[Hatzikraniotis, E.; Paraskevopoulos, K. M.; Chrissafis, K.] Aristotle Univ Thessaloniki, Dept Phys, Thessaloniki 54124, Greece.
[Kanatzidis, M. G.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Kanatzidis, M. G.] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
RP Kyratsi, T (reprint author), Univ Cyprus, Dept Mech & Mfg Engn, CY-1678 Nicosia, Cyprus.
EM kyratsi@ucy.ac.cy
RI Paraskeuopoulos, Konstantinos/F-9926-2011;
OI Chrissafis, Konstantinos/0000-0003-1546-8565; KYRATSI,
THEODORA/0000-0003-2916-1708
FU ONR; [THEMATA-TEXNO/0104/16]
FX The authors thank Dr. E. Pavlidou for her help with EDS measurements.
Cyprus Research Promotion Foundation is greatly acknowledged for the
financial support (THEMATA-TEXNO/0104/16). MGK thanks ONR for support.
NR 31
TC 5
Z9 5
U1 1
U2 15
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-8388
EI 1873-4669
J9 J ALLOY COMPD
JI J. Alloy. Compd.
PD APR 17
PY 2009
VL 474
IS 1-2
BP 351
EP 357
DI 10.1016/j.jallcom.2008.06.143
PG 7
WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &
Metallurgical Engineering
SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
GA 457RZ
UT WOS:000266952000076
ER
PT J
AU Philominathan, STL
Koide, T
Hamada, K
Yasui, H
Seifert, S
Matsushita, O
Sakon, J
AF Philominathan, Sagaya Theresa Leena
Koide, Takaki
Hamada, Kentaro
Yasui, Hiroyuki
Seifert, Soenke
Matsushita, Osamu
Sakon, Joshua
TI Unidirectional Binding of Clostridial Collagenase to Triple Helical
Substrates
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID X-RAY-SCATTERING; PROTEIN INTERACTIONS; DUPUYTRENS-DISEASE;
NMR-SPECTROSCOPY; DOMAIN; HISTOLYTICUM; ASSIGNMENTS; PEPTIDASE;
AFFINITY; MODELS
AB Histotoxic clostridia produce collagenases responsible for extensive tissue destruction in gas gangrene. The C-terminal collagen-binding domain (CBD) of these enzymes is the minimal segment required to bind to collagen fibril. Collagen binding efficiency of CBD is more pronounced in the presence of Ca(2+). We have shown that CBD can be functional to anchor growth factors in local tissue. A (1)H-(15)N HSQC NMR titration study with three different tropocollagen analogues ((POG)(10))(3), ((GPOG)(7)PRG)(3), and (GPRG(POG)(7)C-carbamidomethyl)(3), mapped a saddle-like binding cleft on CBD. NMR titrations with three nitroxide spin-labeled analogues of collagenous peptide, (PROXYL-G(POG)(7)PRG)(3), (PROXYL-G(POG)(7))(3), and (GPRG(POG)(7)C-PROXYL)(3) (where PROXYL represents 2,2,5,5-tetramethyl-L-pyrrolidinyloxy), unambiguously demonstrated unidirectional binding of CBD to the tropocollagen analogues. Small angle x-rays cattering data revealed that CBD binds closer to a terminus for each of the five different tropocollagen analogues, which in conjunction with NMR titration studies, implies a binding mode where CBD binds to the C terminus of the triple helix.
C1 [Philominathan, Sagaya Theresa Leena; Sakon, Joshua] Univ Arkansas, Dept Chem & Biochem, Fayetteville, AR 72701 USA.
[Koide, Takaki; Hamada, Kentaro] Waseda Univ, Dept Chem & Biochem, Sch Adv Sci & Engn, Tokyo 1698555, Japan.
[Yasui, Hiroyuki] Kyoto Pharmaceut Univ, Dept Analyt & Bioinorgan Chem, Kyoto 6048414, Japan.
[Seifert, Soenke] Argonne Natl Lab, Adv Photon Source, Xray Sci Div, Argonne, IL 60439 USA.
[Matsushita, Osamu] Kitasato Univ, Sch Med, Dept Microbiol & Parasitol, Kanagawa 2288555, Japan.
RP Philominathan, STL (reprint author), Univ Arkansas, Dept Chem & Biochem, Fayetteville, AR 72701 USA.
EM pstleena@uark.edu
RI Sakon, Joshua/N-2289-2014
OI Sakon, Joshua/0000-0002-8373-969X
FU National Institutes of Health Center for Protein Structure and Function
[NCRR COBRE 1 P20RR15569, INBRE P20RR16460.]; Japan Society for the
Promotion of Science and Kagawa University
FX This work was supported, in whole or in part, by the National Institutes
of Health Center for Protein Structure and Function Grants NCRR COBRE 1
P20RR15569 and INBRE P20RR16460. This work was also supported by the AR
Biosciences Institute (ABI) and a grant-in-aid for scientific research
(C) from the Japan Society for the Promotion of Science and Kagawa
University Project Research Fund 2005-2006.
NR 30
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U1 0
U2 8
PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA
SN 0021-9258
J9 J BIOL CHEM
JI J. Biol. Chem.
PD APR 17
PY 2009
VL 284
IS 16
BP 10868
EP 10876
DI 10.1074/jbc.M807684200
PG 9
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 431ZZ
UT WOS:000265104600060
PM 19208618
ER
PT J
AU Nowinski, NS
Trumbore, SE
Jimenez, G
Fenn, ME
AF Nowinski, Nicole S.
Trumbore, Susan E.
Jimenez, Gloria
Fenn, Mark E.
TI Alteration of belowground carbon dynamics by nitrogen addition in
southern California mixed conifer forests
SO JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
LA English
DT Article
ID SAN-BERNARDINO MOUNTAINS; PHENOLIC HUMUS CONSTITUENTS; HARDWOOD LEAF
LITTER; SOIL RESPIRATION; TEMPERATE FOREST; PONDEROSA PINE; N
DEPOSITION; MICROBIAL COMMUNITY; ENZYME-ACTIVITY; ORGANIC-MATTER
AB Nitrogen deposition rates in southern California are the highest in North America and have had substantial effects on ecosystem functioning. We document changes in the belowground C cycle near ponderosa pine trees experiencing experimental nitrogen (N) addition (50 and 150 kg N ha(-1) a(-1) as slow release urea since 1997) at two end-member sites along a pollution gradient in the San Bernardino Mountains, California. Despite considerable differences in N deposition between the two sites, we observed parallel changes in microbial substrate use and soil enzyme activity with N addition. Delta C-14 measurements indicate that the mean age of C respired by the Oa horizon declined 10-15 years with N addition at both sites. N addition caused an increase in cellulolytic enzyme activity at the polluted site and a decrease in ligninolytic enzyme activity at the unpolluted site. Given the likely differences in lignin and cellulose ages, this could explain the difference in the age of microbial respiration with N addition. Measurements of fractionated soil organic matter did not show the same magnitude of changes in response to N addition as were observed for respired C. This lesser response was likely because the soils are mostly composed of C having turnover times of decades to centuries, and 9 years of N amendment were not enough to affect this material. Consequently, Delta C-14 of respired CO2 provided a more sensitive indicator of the effects of N addition than other methods. Results suggest that enhanced N deposition alone may not result in increased soil C storage in xeric ecosystems.
C1 [Nowinski, Nicole S.; Trumbore, Susan E.] Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA.
[Jimenez, Gloria] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
[Fenn, Mark E.] Pacific SW Res Stn, Forest Fire Lab, Riverside, CA 92507 USA.
RP Nowinski, NS (reprint author), Univ Calif Irvine, Dept Earth Syst Sci, 3200 Croul Hall, Irvine, CA 92697 USA.
EM nnowinsk@alumni.uci.edu
RI Trumbore, Susan/B-1948-2013
FU Kearney Foundation for Graduate Fellowship [2005.221]
FX This work was financially supported by a Kearney Foundation for Graduate
Fellowship and grant 2005.221. We thank K. McDuffee, C. Czimczik, G.
Goteti, J. Nowinski, and D. Nowinski for field assistance, X. Xu for
laboratory assistance, N. Grulke for assistance with the sites, J. Neff
and D. Fernandez for the pyr-GCMS data, and S. Allison for assistance
with the enzyme assays.
NR 66
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U1 0
U2 18
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-BIOGEO
JI J. Geophys. Res.-Biogeosci.
PD APR 17
PY 2009
VL 114
AR G02005
DI 10.1029/2008JG000801
PG 15
WC Environmental Sciences; Geosciences, Multidisciplinary
SC Environmental Sciences & Ecology; Geology
GA 435FQ
UT WOS:000265329700001
ER
PT J
AU Petrova, T
Lunin, VY
Ginell, S
Hazemann, I
Lazarski, K
Mitschler, A
Podjarny, A
Joachimiak, A
AF Petrova, Tatiana
Lunin, Vladimir Y.
Ginell, Stephan
Hazemann, Isabelle
Lazarski, Krzysztof
Mitschler, Andre
Podjarny, Alberto
Joachimiak, Andrzej
TI X-Ray-Radiation-Induced Cooperative Atomic Movements in Protein
SO JOURNAL OF MOLECULAR BIOLOGY
LA English
DT Article
DE protein molecule; radiation damage; structural changes; crystal disorder
ID HUMAN ALDOSE REDUCTASE; ULTRAHIGH-RESOLUTION; MACROMOLECULAR CRYSTALS;
ACTIVE-SITE; CRYOGENIC TEMPERATURES; STRUCTURAL-CHANGES; DAMAGE;
DIFFRACTION; DYNAMICS; CRYSTALLOGRAPHY
AB X-rays interact with biological matter and cause damage. Proteins and other macromolecules are damaged primarily by ionizing X-ray photons and secondarily by reactive radiolytic chemical species. In particular, protein molecules are damaged during X-ray diffraction experiments with protein crystals, which is, in many cases, a serious hindrance to structure solution. The local X-ray-induced structural changes of the protein molecule have been studied using a number of model systems. However, it is still not well understood whether these local chemical changes lead to global structural changes in protein and what the mechanism is.
We present experimental evidence at atomic resolution indicating the movement of large parts of the protein globule together with bound water molecules in the early stages of radiation damage to the protein crystal. The data were obtained from a crystal cryocooled to similar to 100 K and diffracting to 1 angstrom. The movement of the protein structural elements occurs simultaneously with the decarboxylation of several glutamate and aspartate residues that mediate contacts between moving protein structural elements and with the rearrangement of the water network. The analysis of the anisotropy of atomic displacement parameters reveals that the observed atomic movements occur at different rates in different unit cells of the crystal. Thus, the examination of the cooperative atomic movement enables us to better understand how radiation-induced local chemical and structural changes of the protein molecule eventually lead to disorder in protein crystals. (C) 2009 Elsevier Ltd. All rights reserved.
C1 [Petrova, Tatiana; Ginell, Stephan; Lazarski, Krzysztof; Joachimiak, Andrzej] Argonne Natl Lab, Biosci Div, Struct Biol Ctr, Argonne, IL 60439 USA.
[Petrova, Tatiana; Lunin, Vladimir Y.] Russian Acad Sci, Inst Math Problems Biol, Pushchino 142290, Russia.
[Hazemann, Isabelle; Mitschler, Andre; Podjarny, Alberto] ULP, CNRS, INSERM, IGBMC,Dept Biol Struct & Genom, F-67404 Illkirch Graffenstaden, France.
RP Joachimiak, A (reprint author), Argonne Natl Lab, Biosci Div, Struct Biol Ctr, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Petrova, Tatiana/N-1578-2013; Lunin, Vladimir/O-2506-2013;
OI Petrova, Tatiana/0000-0002-8032-2629; Lunin,
Vladimir/0000-0003-1235-1206; Podjarny, Alberto/0000-0002-7685-1077
FU U.S. Department of Energy; Office of Biological and Environmental
Research [DE-AC02-06CH11357]; Russian Foundation for Basic Research
[07-04-00137]; Centre National de la Recherche Scientifique; Instittit
National de la Sante et de la Recherche Medicale; Hopital Universitaire
de Strasbourg
FX We thank R. Alkire for help with ion current measurements, the Institute
for Diabetes Discovery for providing the inhibitor IDD 594, and Lindsey
Butler for help in preparing the manuscript. This work was supported by
the U.S. Department of Energy, Office of Biological and Environmental
Research, under contract DE-AC02-06CH11357 and the Russian Foundation
for Basic Research grant 07-04-00137. This work was also supported by
the Centre National de la Recherche Scientifique, by the Instittit
National de la Sante et de la Recherche Medicale, and by the Hopital
Universitaire de Strasbourg.
NR 54
TC 11
Z9 11
U1 0
U2 3
PU ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
PI LONDON
PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
SN 0022-2836
J9 J MOL BIOL
JI J. Mol. Biol.
PD APR 17
PY 2009
VL 387
IS 5
BP 1092
EP 1105
DI 10.1016/j.jmb.2009.02.030
PG 14
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 437QC
UT WOS:000265501000006
PM 19233199
ER
PT J
AU Aaltonen, T
Adelman, J
Akimoto, T
Albrow, MG
Gonzalez, BA
Amerio, S
Amidei, D
Anastassov, A
Annovi, A
Antos, J
Apollinari, G
Apresyan, A
Arisawa, T
Artikov, A
Ashmanskas, W
Attal, A
Aurisano, A
Azfar, F
Azzurri, P
Badgett, W
Barbaro-Galtieri, A
Barnes, VE
Barnett, BA
Bartsch, V
Bauer, G
Beauchemin, PH
Bedeschi, F
Bednar, P
Beecher, D
Behari, S
Bellettini, G
Bellinger, J
Benjamin, D
Beretvas, A
Beringer, J
Bhatti, A
Binkley, M
Bisello, D
Bizjak, I
Blair, RE
Blocker, C
Blumenfeld, B
Bocci, A
Bodek, A
Boisvert, V
Bolla, G
Bortoletto, D
Boudreau, J
Boveia, A
Brau, B
Bridgeman, A
Brigliadori, L
Bromberg, C
Brubaker, E
Budagov, J
Budd, HS
Budd, S
Burkett, K
Busetto, G
Bussey, P
Buzatu, A
Byrum, KL
Cabrera, S
Calancha, C
Campanelli, M
Campbell, M
Canelli, F
Canepa, A
Carlsmith, D
Carosi, R
Carrillo, S
Carron, S
Casal, B
Casarsa, M
Castro, A
Catastini, P
Cauz, D
Cavaliere, V
Cavalli-Sforza, M
Cerri, A
Cerrito, L
Chang, SH
Chen, YC
Chertok, M
Chiarelli, G
Chlachidze, G
Chlebana, F
Cho, K
Chokheli, D
Chou, JP
Choudalakis, G
Chuang, SH
Chung, K
Chung, WH
Chung, YS
Ciobanu, CI
Ciocci, MA
Clark, A
Clark, D
Compostella, G
Convery, ME
Conway, J
Copic, K
Cordelli, M
Cortiana, G
Cox, DJ
Crescioli, F
Almenar, CC
Cuevas, J
Culbertson, R
Cully, JC
Dagenhart, D
Datta, M
Davies, T
de Barbaro, P
De Cecco, S
Deisher, A
De Lorenzo, G
Dell'Orso, M
Deluca, C
Demortier, L
Deng, J
Deninno, M
Derwent, PF
di Giovanni, GP
Dionisi, C
Di Ruzza, B
Dittmann, JR
D'Onofrio, M
Donati, S
Dong, P
Donini, J
Dorigo, T
Dube, S
Efron, J
Elagin, A
Erbacher, R
Errede, D
Errede, S
Eusebi, R
Fang, HC
Farrington, S
Fedorko, WT
Feild, RG
Feindt, M
Fernandez, JP
Ferrazza, C
Field, R
Flanagan, G
Forrest, R
Franklin, M
Freeman, JC
Furic, I
Gallinaro, M
Galyardt, J
Garberson, F
Garcia, JE
Garfinkel, AF
Genser, K
Gerberich, H
Gerdes, D
Gessler, A
Giagu, S
Giakoumopoulou, V
Giannetti, P
Gibson, K
Gimmell, JL
Ginsburg, CM
Giokaris, N
Giordani, M
Giromini, P
Giunta, M
Giurgiu, G
Glagolev, V
Glenzinski, D
Gold, M
Goldschmidt, N
Golossanov, A
Gomez, G
Gomez-Ceballos, G
Goncharov, M
Gonzalez, O
Gorelov, I
Goshaw, AT
Goulianos, K
Gresele, A
Grinstein, S
Grosso-Pilcher, C
Group, RC
Grundler, U
da Costa, JG
Gunay-Unalan, Z
Haber, C
Hahn, K
Hahn, SR
Halkiadakis, E
Han, BY
Han, JY
Handler, R
Happacher, F
Hara, K
Hare, D
Hare, M
Harper, S
Harr, RF
Harris, RM
Hartz, M
Hatakeyama, K
Hauser, J
Hays, C
Heck, M
Heijboer, A
Heinemann, B
Heinrich, J
Henderson, C
Herndon, M
Heuser, J
Hewamanage, S
Hidas, D
Hill, CS
Hirschbuehl, D
Hocker, A
Hou, S
Houlden, M
Hsu, SC
Huffman, BT
Hughes, RE
Husemann, U
Huston, J
Incandela, J
Introzzi, G
Iori, M
Ivanov, A
James, E
Jayatilaka, B
Jeon, EJ
Jha, MK
Jindariani, S
Johnson, W
Jones, M
Joo, KK
Jun, SY
Jung, JE
Junk, TR
Kamon, T
Kar, D
Karchin, PE
Kato, Y
Kephart, R
Keung, J
Khotilovich, V
Kilminster, B
Kim, DH
Kim, HS
Kim, JE
Kim, MJ
Kim, SB
Kim, SH
Kim, YK
Kimura, N
Kirsch, L
Klimenko, S
Knuteson, B
Ko, BR
Koay, SA
Kondo, K
Kong, DJ
Konigsberg, J
Korytov, A
Kotwal, AV
Kreps, M
Kroll, J
Krop, D
Krumnack, N
Kruse, M
Krutelyov, V
Kubo, T
Kuhr, T
Kulkarni, NP
Kurata, M
Kusakabe, Y
Kwang, S
Laasanen, AT
Lami, S
Lammel, S
Lancaster, M
Lander, RL
Lannon, K
Lath, A
Latino, G
Lazzizzera, I
LeCompte, T
Lee, E
Lee, SW
Leone, S
Lewis, JD
Lin, CS
Linacre, J
Lindgren, M
Lipeles, E
Lister, A
Litvintsev, DO
Liu, C
Liu, T
Lockyer, NS
Loginov, A
Loreti, M
Lovas, L
Lu, RS
Lucchesi, D
Lueck, J
Luci, C
Lujan, P
Lukens, P
Lungu, G
Lyons, L
Lys, J
Lysak, R
Lytken, E
Mack, P
MacQueen, D
Madrak, R
Maeshima, K
Makhoul, K
Maki, T
Maksimovic, P
Malde, S
Malik, S
Manca, G
Manousakis-Katsikakis, A
Margaroli, F
Marino, C
Marino, CP
Martin, A
Martin, V
Martinez, M
Martinez-Ballarin, R
Maruyama, T
Mastrandrea, P
Masubuchi, T
Mattson, ME
Mazzanti, P
McFarland, KS
McIntyre, P
McNulty, R
Mehta, A
Mehtala, P
Menzione, A
Merkel, P
Mesropian, C
Miao, T
Miladinovic, N
Miller, R
Mills, C
Milnik, M
Mitra, A
Mitselmakher, G
Miyake, H
Moggi, N
Moon, CS
Moore, R
Morello, MJ
Morlok, J
Fernandez, PM
Mulmenstadt, J
Mukherjee, A
Muller, T
Mumford, R
Murat, P
Mussini, M
Nachtman, J
Nagai, Y
Nagano, A
Naganoma, J
Nakamura, K
Nakano, I
Napier, A
Necula, V
Neu, C
Neubauer, MS
Nielsen, J
Nodulman, L
Norman, M
Norniella, O
Nurse, E
Oakes, L
Oh, SH
Oh, YD
Oksuzian, I
Okusawa, T
Orava, R
Osterberg, K
Griso, SP
Pagliarone, C
Palencia, E
Papadimitriou, V
Papaikonomou, A
Paramonov, AA
Parks, B
Pashapour, S
Patrick, J
Pauletta, G
Paulini, M
Paus, C
Pellett, DE
Penzo, A
Phillips, TJ
Piacentino, G
Pianori, E
Pinera, L
Pitts, K
Plager, C
Pondrom, L
Poukhov, O
Pounder, N
Prakoshyn, F
Pronko, A
Proudfoot, J
Ptohos, F
Pueschel, E
Punzi, G
Pursley, J
Rademacker, J
Rahaman, A
Ramakrishnan, V
Ranjan, N
Redondo, I
Reisert, B
Rekovic, V
Renton, P
Rescigno, M
Richter, S
Rimondi, F
Ristori, L
Robson, A
Rodrigo, T
Rodriguez, T
Rogers, E
Rolli, S
Roser, R
Rossi, M
Rossin, R
Roy, P
Ruiz, A
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Rusu, V
Saarikko, H
Safonov, A
Sakumoto, WK
Salto, O
Santi, L
Sarkar, S
Sartori, L
Sato, K
Savoy-Navarro, A
Scheidle, T
Schlabach, P
Schmidt, A
Schmidt, EE
Schmidt, MA
Schmidt, MP
Schmitt, M
Schwarz, T
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Scott, AL
Scribano, A
Scuri, F
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Seidel, S
Seiya, Y
Semenov, A
Sexton-Kennedy, L
Sfyrla, A
Shalhout, SZ
Shears, T
Shekhar, R
Shepard, PF
Sherman, D
Shimojima, M
Shiraishi, S
Shochet, M
Shon, Y
Shreyber, I
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Sinervo, P
Sisakyan, A
Slaughter, AJ
Slaunwhite, J
Sliwa, K
Smith, JR
Snider, FD
Snihur, R
Soha, A
Somalwar, S
Sorin, V
Spalding, J
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Stanitzki, M
Denis, RS
Stelzer, B
Stelzer-Chilton, O
Stentz, D
Strologas, J
Stuart, D
Suh, JS
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Suslov, I
Suzuki, T
Taffard, A
Takashima, R
Takeuchi, Y
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van Remortel, N
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Vataga, E
Vazquez, F
Velev, G
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Veszpremi, V
Vidal, M
Vidal, R
Vila, I
Vilar, R
Vine, T
Vogel, M
Volobouev, I
Volpi, G
Wurthwein, F
Wagner, P
Wagner, RG
Wagner, RL
Wagner-Kuhr, J
Wagner, W
Wakisaka, T
Wallny, R
Wang, SM
Warburton, A
Waters, D
Weinberger, M
Wester, WC
Whitehouse, B
Whiteson, D
Whiteson, S
Wicklund, AB
Wicklund, E
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Wilson, P
Winer, BL
Wittich, P
Wolbers, S
Wolfe, C
Wright, T
Wu, X
Wynne, SM
Xie, S
Yagil, A
Yamamoto, K
Yamaoka, J
Yang, UK
Yang, YC
Yao, WM
Yeh, GP
Yoh, J
Yorita, K
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Yu, GB
Yu, I
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Yun, JC
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Zaw, I
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Akimoto, T.
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Alvarez Gonzalez, B.
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Shekhar, R.
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Shiraishi, S.
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Shreyber, I.
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Yao, W. M.
Yeh, G. P.
Yoh, J.
Yorita, K.
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Yu, I.
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CA CDF Collaboration
TI Measurement of the Top-Quark Mass with Dilepton Events Selected Using
Neuroevolution at CDF
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID NEURAL-NETWORKS; FERMILAB; COLLISIONS; TEVATRON; TEV
AB We report a measurement of the top-quark mass M(t) in the dilepton decay channel tt -> bl('+)nu(')(l)b1 nu(l). Events are selected with a neural network which has been directly optimized for statistical precision in top-quark mass using neuroevolution, a technique modeled on biological evolution. The top-quark mass is extracted from per-event probability densities that are formed by the convolution of leading order matrix elements and detector resolution functions. The joint probability is the product of the probability densities from 344 candidate events in 2.0 fb(-1) of pp collisions collected with the CDF II detector, yielding a measurement of M(t)=171.2 +/- 2.7(stat)+/- 2.9(syst) GeV/c(2).
C1 [Aaltonen, T.; Maki, T.; Mehtala, P.; Orava, R.; Osterberg, K.; Saarikko, H.; van Remortel, N.] Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland.
[Aaltonen, T.; Maki, T.; Mehtala, P.; Orava, R.; Osterberg, K.; Saarikko, H.; van Remortel, N.] Helsinki Inst Phys, FIN-00014 Helsinki, Finland.
[Chen, Y. C.; Hou, S.; Lu, R. -S.; Mitra, A.; Teng, P. K.; Wang, S. M.; Yang, U. K.] Acad Sinica, Inst Phys, Taipei 11529, Taiwan.
[Blair, R. E.; Byrum, K. L.; LeCompte, T.; Nodulman, L.; Proudfoot, J.; Wagner, R. G.; Wicklund, A. B.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Giakoumopoulou, V.; Giokaris, N.; Manousakis-Katsikakis, A.; Vellidis, C.] Univ Athens, GR-15771 Athens, Greece.
[Attal, A.; Cavalli-Sforza, M.; De Lorenzo, G.; Deluca, C.; D'Onofrio, M.; Martinez, M.; Salto, O.] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain.
[Dittmann, J. R.; Hewamanage, S.; Krumnack, N.] Baylor Univ, Waco, TX 76798 USA.
[Castro, A.; Deninno, M.; Jha, M. K.; Mazzanti, P.; Moggi, N.; Mussini, M.; Rimondi, F.; Zucchelli, S.] Ist Nazl Fis Nucl, I-40127 Bologna, Italy.
[Castro, A.; Deninno, M.; Mussini, M.; Rimondi, F.; Zucchelli, S.] Univ Bologna, I-40127 Bologna, Italy.
[Blocker, C.; Clark, D.; Kirsch, L.; Miladinovic, N.] Brandeis Univ, Waltham, MA 02254 USA.
[Chertok, M.; Conway, J.; Cox, D. J.; Almenar, C. Cuenca; Erbacher, R.; Forrest, R.; Ivanov, A.; Johnson, W.; Lander, R. L.; Lister, A.; Pellett, D. E.; Schwarz, T.; Smith, J. R.; Soha, A.] Univ Calif Davis, Davis, CA 95616 USA.
[Dong, P.; Hauser, J.; Plager, C.; Stelzer, B.; Wallny, R.; Zheng, Y.] Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
[Hsu, S. -C.; Lipeles, E.; Norman, M.; Wuerthwein, F.; Yagil, A.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[Boveia, A.; Brau, B.; Garberson, F.; Hill, C. S.; Incandela, J.; Koay, S. A.; Krutelyov, V.; Rossin, R.; Scott, A. L.; Stuart, D.] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
[Alvarez Gonzalez, B.; Casal, B.; Cuevas, J.; Gomez, G.; Rodrigo, T.; Ruiz, A.; Scodellaro, L.; Vila, I.; Vilar, R.] Univ Cantabria, Inst Fis Cantabria, CSIC, E-39005 Santander, Spain.
[Chung, K.; Galyardt, J.; Jun, S. Y.; Paulini, M.; Pueschel, E.; Russ, J.; Tiwari, V.] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
[Adelman, J.; Brubaker, E.; Fedorko, W. T.; Grosso-Pilcher, C.; Kim, Y. K.; Krop, D.; Kwang, S.; Paramonov, A. A.; Schmidt, M. A.; Shiraishi, S.; Shochet, M.; Wolfe, C.; Yang, U. K.; Yorita, K.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
[Antos, J.; Bednar, P.; Lovas, L.; Lysak, R.; Tokar, S.] Comenius Univ, Bratislava 84248, Slovakia.
[Antos, J.; Bednar, P.; Lovas, L.; Lysak, R.; Tokar, S.] Inst Expt Phys, Kosice 04001, Slovakia.
[Artikov, A.; Budagov, J.; Chokheli, D.; Glagolev, V.; Poukhov, O.; Prakoshyn, F.; Semenov, A.; Sisakyan, A.; Suslov, I.] Joint Inst Nucl Res, RU-141980 Dubna, Russia.
[Benjamin, D.; Bocci, A.; Cabrera, S.; Deng, J.; Goshaw, A. T.; Hidas, D.; Jayatilaka, B.; Ko, B. R.; Kotwal, A. V.; Kruse, M.; Necula, V.; Oh, S. H.; Phillips, T. J.; Shekhar, R.; Whiteson, S.] Duke Univ, Durham, NC 27708 USA.
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[Bromberg, C.; Campanelli, M.; Gunay-Unalan, Z.; Huston, J.; Miller, R.; Sorin, V.; Tollefson, K.] Michigan State Univ, E Lansing, MI 48824 USA.
[Shreyber, I.] Inst Theoret & Expt Phys, Moscow 117259, Russia.
[Gold, M.; Gorelov, I.; Rekovic, V.; Seidel, S.; Strologas, J.; Vogel, M.] Univ New Mexico, Albuquerque, NM 87131 USA.
[Anastassov, A.; Schmitt, M.; Stentz, D.] Northwestern Univ, Evanston, IL 60208 USA.
[Efron, J.; Hughes, R. E.; Kilminster, B.; Lannon, K.; Parks, B.; Slaunwhite, J.; Winer, B. L.] Ohio State Univ, Columbus, OH 43210 USA.
[Nakano, I.; Takashima, R.; Tanaka, R.] Okayama Univ, Okayama 7008530, Japan.
[Kato, Y.; Okusawa, T.; Seiya, Y.; Wakisaka, T.; Yamamoto, K.; Yoshida, T.] Osaka City Univ, Osaka 588, Japan.
[Azfar, F.; Farrington, S.; Harper, S.; Hays, C.; Huffman, B. T.; Linacre, J.; Lyons, L.; Malde, S.; Oakes, L.; Pounder, N.; Rademacker, J.; Renton, P.; Stelzer-Chilton, O.] Univ Oxford, Oxford OX1 3RH, England.
[Bisello, D.; Brigliadori, L.; Busetto, G.; Compostella, G.; Cortiana, G.; De Lorenzo, G.; Donini, J.; Dorigo, T.; Gresele, A.; Lazzizzera, I.; Lucchesi, D.; Griso, S. Pagan] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
[Bisello, D.; Busetto, G.; Cortiana, G.; Gresele, A.; Lazzizzera, I.; Loreti, M.; Lucchesi, D.; Griso, S. Pagan] Univ Padua, I-35131 Padua, Italy.
[Ciobanu, C. I.; di Giovanni, G. P.; Savoy-Navarro, A.; Tourneur, S.] Univ Paris 06, LPNHE, IN2P3, CNRS,UMR7585, F-75252 Paris, France.
[Amerio, S.; Canepa, A.; Heijboer, A.; Heinrich, J.; Keung, J.; Kroll, J.; Lockyer, N. S.; Neu, C.; Pianori, E.; Rodriguez, T.; Thomson, E.; Tu, Y.; Whiteson, D.; Williams, H. H.] Univ Penn, Philadelphia, PA 19104 USA.
[Azzurri, P.; Bedeschi, F.; Bellettini, G.; Carosi, R.; Catastini, P.; Cavaliere, V.; Chiarelli, G.; Ciocci, M. A.; Crescioli, F.; Dell'Orso, M.; Donati, S.; Ferrazza, C.; Garcia, J. E.; Giannetti, P.; Giunta, M.; Introzzi, G.; Lami, S.; Latino, G.; Leone, S.; Menzione, A.; Morello, M. J.; Pagliarone, C.; Piacentino, G.; Punzi, G.; Ristori, L.; Sartori, L.; Scribano, A.; Scuri, F.; Sidoti, A.; Squillacioti, P.; Turini, N.; Vataga, E.; Volpi, G.] Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
[Bellettini, G.; Crescioli, F.; Dell'Orso, M.; Donati, S.; Giunta, M.; Morello, M. J.; Punzi, G.; Volpi, G.] Univ Pisa, I-56127 Pisa, Italy.
[Catastini, P.; Cavaliere, V.; Ciocci, M. A.; Latino, G.; Scribano, A.; Squillacioti, P.; Turini, N.] Univ Siena, I-56127 Pisa, Italy.
[Azzurri, P.; Ferrazza, C.; Vataga, E.] Scuola Normale Super Pisa, I-56127 Pisa, Italy.
[Boudreau, J.; Gibson, K.; Hartz, M.; Liu, C.; Rahaman, A.; Shepard, P. F.] Univ Pittsburgh, Pittsburgh, PA 15260 USA.
[Apresyan, A.; Barnes, V. E.; Bolla, G.; Bortoletto, D.; Flanagan, G.; Garfinkel, A. F.; Jones, M.; Laasanen, A. T.; Lytken, E.; Margaroli, F.; Merkel, P.; Ranjan, N.; Sedov, A.; Veszpremi, V.] Purdue Univ, W Lafayette, IN 47907 USA.
[Bodek, A.; Boisvert, V.; Budd, H. S.; Chung, Y. S.; de Barbaro, P.; Gimmell, J. L.; Han, B. -Y.; Han, J. Y.; McFarland, K. S.; Sakumoto, W. K.; Yu, G. B.] Univ Rochester, Rochester, NY 14627 USA.
[Bhatti, A.; Demortier, L.; Goulianos, K.; Hatakeyama, K.; Lungu, G.; Mesropian, C.; Terashi, K.] Rockefeller Univ, New York, NY 10021 USA.
[De Cecco, S.; Dionisi, C.; Gallinaro, M.; Giagu, S.; Jones, M.; Luci, C.; Mastrandrea, P.; Rescigno, M.; Sarkar, S.; Zanello, L.] Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, Italy.
[Dionisi, C.; Giagu, S.; Jones, M.; Luci, C.; Sarkar, S.; Zanello, L.] Sapienza Univ Roma, I-00185 Rome, Italy.
[Chuang, S. H.; Dube, S.; Halkiadakis, E.; Hare, D.; Lath, A.; Somalwar, S.; Yamaoka, J.] Rutgers State Univ, Piscataway, NJ 08855 USA.
[Aurisano, A.; Elagin, A.; Goncharov, M.; Kamon, T.; Khotilovich, V.; Lee, E.; Lee, S. W.; McIntyre, P.; Napier, A.; Safonov, A.; Toback, D.; Weinberger, M.] Texas A&M Univ, College Stn, TX 77843 USA.
[Cauz, D.; Di Ruzza, B.; Giordani, M.; Pauletta, G.; Penzo, A.; Rossi, M.; Santi, L.; Totaro, P.; Zanetti, A.] Ist Nazl Fis Nucl Trieste Udine, Udine, Italy.
[Cauz, D.; Di Ruzza, B.; Giordani, M.; Pauletta, G.; Penzo, A.; Rossi, M.; Santi, L.; Totaro, P.; Zanetti, A.] Univ Trieste Udine, Udine, Italy.
[Akimoto, T.; Hara, K.; Hare, M.; Kim, S. H.; Kimura, N.; Kubo, T.; Kurata, M.; Maruyama, T.; Masubuchi, T.; Miyake, H.; Nagai, Y.; Nagano, A.; Nakamura, K.; Shimojima, M.; Suzuki, T.; Takeuchi, Y.; Tomura, T.; Ukegawa, F.] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan.
[Rolli, S.; Sliwa, K.; Whitehouse, B.] Tufts Univ, Medford, MA 02155 USA.
[Arisawa, T.; Kondo, K.; Kusakabe, Y.; Naganoma, J.] Waseda Univ, Tokyo 169, Japan.
[Harr, R. F.; Karchin, P. E.; Kulkarni, N. P.; Mattson, M. E.; Shalhout, S. Z.] Wayne State Univ, Detroit, MI 48201 USA.
[Bellinger, J.; Carlsmith, D.; Chung, W. H.; Handler, R.; Herndon, M.; Pondrom, L.; Pursley, J.; Ramakrishnan, V.; Shon, Y.] Univ Wisconsin, Madison, WI 53706 USA.
[Feild, R. G.; Husemann, U.; Loginov, A.; Martin, A.; Schmidt, M. P.; Stanitzki, M.; Tipton, P.] Yale Univ, New Haven, CT 06520 USA.
RP Aaltonen, T (reprint author), Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland.
RI Amerio, Silvia/J-4605-2012; Punzi, Giovanni/J-4947-2012; Annovi,
Alberto/G-6028-2012; Ivanov, Andrew/A-7982-2013; Warburton,
Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014; Campbell,
Michelle/B-5793-2008; Ruiz, Alberto/E-4473-2011; Robson,
Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; manca,
giulia/I-9264-2012; Lysak, Roman/H-2995-2014; Moon,
Chang-Seong/J-3619-2014; Gorelov, Igor/J-9010-2015; Xie, Si/O-6830-2016;
Canelli, Florencia/O-9693-2016; Lazzizzera, Ignazio/E-9678-2015;
Chiarelli, Giorgio/E-8953-2012; Scodellaro, Luca/K-9091-2014; Grinstein,
Sebastian/N-3988-2014; Paulini, Manfred/N-7794-2014; Russ,
James/P-3092-2014; unalan, zeynep/C-6660-2015; vilar, rocio/P-8480-2014;
Cabrera Urban, Susana/H-1376-2015; Garcia, Jose /H-6339-2015; ciocci,
maria agnese /I-2153-2015; Cavalli-Sforza, Matteo/H-7102-2015;
Muelmenstaedt, Johannes/K-2432-2015; Introzzi, Gianluca/K-2497-2015
OI Punzi, Giovanni/0000-0002-8346-9052; Annovi,
Alberto/0000-0002-4649-4398; Ivanov, Andrew/0000-0002-9270-5643;
Warburton, Andreas/0000-0002-2298-7315; Ruiz,
Alberto/0000-0002-3639-0368; Moon, Chang-Seong/0000-0001-8229-7829;
Farrington, Sinead/0000-0001-5350-9271; Robson,
Aidan/0000-0002-1659-8284; Gallinaro, Michele/0000-0003-1261-2277;
Torre, Stefano/0000-0002-7565-0118; Turini, Nicola/0000-0002-9395-5230;
Osterberg, Kenneth/0000-0003-4807-0414; Vidal Marono,
Miguel/0000-0002-2590-5987; Margaroli, Fabrizio/0000-0002-3869-0153;
Latino, Giuseppe/0000-0002-4098-3502; Group, Robert/0000-0002-4097-5254;
iori, maurizio/0000-0002-6349-0380; Lancaster, Mark/0000-0002-8872-7292;
Nielsen, Jason/0000-0002-9175-4419; Jun, Soon Yung/0000-0003-3370-6109;
Toback, David/0000-0003-3457-4144; Hays, Chris/0000-0003-2371-9723;
Gorelov, Igor/0000-0001-5570-0133; Xie, Si/0000-0003-2509-5731; Canelli,
Florencia/0000-0001-6361-2117; Lazzizzera, Ignazio/0000-0001-5092-7531;
Lami, Stefano/0000-0001-9492-0147; Chiarelli,
Giorgio/0000-0001-9851-4816; Giordani, Mario/0000-0002-0792-6039;
Casarsa, Massimo/0000-0002-1353-8964; Scodellaro,
Luca/0000-0002-4974-8330; Grinstein, Sebastian/0000-0002-6460-8694;
Paulini, Manfred/0000-0002-6714-5787; Russ, James/0000-0001-9856-9155;
unalan, zeynep/0000-0003-2570-7611; ciocci, maria agnese
/0000-0003-0002-5462; Muelmenstaedt, Johannes/0000-0003-1105-6678;
Introzzi, Gianluca/0000-0002-1314-2580
FU U. S. Department of Energy and National Science Foundation; Italian
Istituto Nazionale di Fisica Nucleare; Ministry of Education, Culture,
Sports, Science and Technology of Japan; Natural Sciences and
Engineering Research Council of Canada; National Science Council of the
Republic of China; Swiss National Science Foundation; A. P. Sloan
Foundation; Bundesministerium fur Bildung und Forschung, Germany; Korean
Science and Engineering Foundation and the Korean Research Foundation;
Science and Technology Facilities Council and the Royal Society, UK;
Institut National de Physique Nucleaire et Physique des Particules/CNRS;
Russian Foundation for Basic Research; Ministerio de Educacion y Ciencia
and Programa Consolider-Ingenio 2010, Spain; Slovak RD Agency; Academy
of Finland
FX We thank the Fermilab staff and the technical staffs of the
participating institutions for their vital contributions. This work was
supported by the U. S. Department of Energy and National Science
Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the
Ministry of Education, Culture, Sports, Science and Technology of Japan;
the Natural Sciences and Engineering Research Council of Canada; the
National Science Council of the Republic of China; the Swiss National
Science Foundation; the A. P. Sloan Foundation; the Bundesministerium
fur Bildung und Forschung, Germany; the Korean Science and Engineering
Foundation and the Korean Research Foundation; the Science and
Technology Facilities Council and the Royal Society, UK; the Institut
National de Physique Nucleaire et Physique des Particules/CNRS; the
Russian Foundation for Basic Research; the Ministerio de Educacion y
Ciencia and Programa Consolider-Ingenio 2010, Spain; the Slovak R&D
Agency; and the Academy of Finland.
NR 28
TC 19
Z9 19
U1 2
U2 9
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 17
PY 2009
VL 102
IS 15
AR 152001
DI 10.1103/PhysRevLett.102.152001
PG 8
WC Physics, Multidisciplinary
SC Physics
GA 434PD
UT WOS:000265285700016
ER
PT J
AU Aaltonen, T
Adelman, J
Akimoto, T
Gonzalez, BA
Amerio, S
Amidei, D
Anastassov, A
Annovi, A
Antos, J
Apollinari, G
Apresyan, A
Arisawa, T
Artikov, A
Ashmanskas, W
Attal, A
Aurisano, A
Azfar, F
Azzurri, P
Badgett, W
Barbaro-Galtieri, A
Barnes, VE
Barnett, BA
Bartsch, V
Bauer, G
Beauchemin, PH
Bedeschi, F
Beecher, D
Behari, S
Bellettini, G
Bellinger, J
Benjamin, D
Beretvas, A
Beringer, J
Bhatti, A
Binkley, M
Bisello, D
Bizjak, I
Blair, RE
Blocker, C
Blumenfeld, B
Bocci, A
Bodek, A
Boisvert, V
Bolla, G
Bortoletto, D
Boudreau, J
Boveia, A
Brau, B
Bridgeman, A
Brigliadori, L
Bromberg, C
Brubaker, E
Budagov, J
Budd, HS
Budd, S
Burke, S
Burkett, K
Busetto, G
Bussey, P
Buzatu, A
Byrum, KL
Cabrera, S
Calancha, C
Campanelli, M
Campbell, M
Canelli, F
Canepa, A
Carls, B
Carlsmith, D
Carosi, R
Carrillo, S
Carron, S
Casal, B
Casarsa, M
Castro, A
Catastini, P
Cauz, D
Cavaliere, V
Cavalli-Sforza, M
Cerri, A
Cerrito, L
Chang, SH
Chen, YC
Chertok, M
Chiarelli, G
Chlachidze, G
Chlebana, F
Cho, K
Chokheli, D
Chou, JP
Choudalakis, G
Chuang, SH
Chung, K
Chung, WH
Chung, YS
Chwalek, T
Ciobanu, CI
Ciocci, MA
Clark, A
Clark, D
Compostella, G
Convery, ME
Conway, J
Cordelli, M
Cortiana, G
Cox, CA
Cox, DJ
Crescioli, F
Almenar, CC
Cuevas, J
Culbertson, R
Cully, JC
Dagenhart, D
Datta, M
Davies, T
de Barbaro, P
De Cecco, S
Deisher, A
De Lorenzo, G
Dell'Orso, M
Deluca, C
Demortier, L
Deng, J
Deninno, M
Derwent, PF
di Giovanni, GP
Dionisi, C
Di Ruzza, B
Dittmann, JR
D'Onofrio, M
Donati, S
Dong, P
Donini, J
Dorigo, T
Dube, S
Efron, J
Elagin, A
Erbacher, R
Errede, D
Errede, S
Eusebi, R
Fang, HC
Farrington, S
Fedorko, WT
Feild, RG
Feindt, M
Fernandez, JP
Ferrazza, C
Field, R
Flanagan, G
Forrest, R
Frank, MJ
Franklin, M
Freeman, JC
Furic, I
Gallinaro, M
Galyardt, J
Garberson, F
Garcia, JE
Garfinkel, AF
Genser, K
Gerberich, H
Gerdes, D
Gessler, A
Giagu, S
Giakoumopoulou, V
Giannetti, P
Gibson, K
Gimmell, JL
Ginsburg, CM
Giokaris, N
Giordani, M
Giromini, P
Giunta, M
Giurgiu, G
Glagolev, V
Glenzinski, D
Gold, M
Goldschmidt, N
Golossanov, A
Gomez, G
Gomez-Ceballos, G
Goncharov, M
Gonzalez, O
Gorelov, I
Goshaw, AT
Goulianos, K
Gresele, A
Grinstein, S
Grosso-Pilcher, C
Group, RC
Grundler, U
da Costa, JG
Gunay-Unalan, Z
Haber, C
Hahn, K
Hahn, SR
Halkiadakis, E
Han, BY
Han, JY
Happacher, F
Hara, K
Hare, D
Hare, M
Harper, S
Harr, RF
Harris, RM
Hartz, M
Hatakeyama, K
Hays, C
Heck, M
Heijboer, A
Heinrich, J
Henderson, C
Herndon, M
Heuser, J
Hewamanage, S
Hidas, D
Hill, CS
Hirschbuehl, D
Hocker, A
Hou, S
Houlden, M
Hsu, SC
Huffman, BT
Hughes, RE
Husemann, U
Hussein, M
Huston, J
Incandela, J
Introzzi, G
Iori, M
Ivanov, A
James, E
Jang, D
Jayatilaka, B
Jeon, EJ
Jha, MK
Jindariani, S
Johnson, W
Jones, M
Joo, KK
Jun, SY
Jung, JE
Junk, TR
Kamon, T
Kar, D
Karchin, PE
Kato, Y
Kephart, R
Keung, J
Khotilovich, V
Kilminster, B
Kim, DH
Kim, HS
Kim, HW
Kim, JE
Kim, MJ
Kim, SB
Kim, SH
Kim, YK
Kimura, N
Kirsch, L
Klimenko, S
Knuteson, B
Ko, BR
Kondo, K
Kong, DJ
Konigsberg, J
Korytov, A
Kotwal, AV
Kreps, M
Kroll, J
Krop, D
Krumnack, N
Kruse, M
Krutelyov, V
Kubo, T
Kuhr, T
Kulkarni, NP
Kurata, M
Kwang, S
Laasanen, AT
Lami, S
Lammel, S
Lancaster, M
Lander, RL
Lannon, K
Lath, A
Latino, G
Lazzizzera, I
LeCompte, T
Lee, E
Lee, HS
Lee, SW
Leone, S
Lewis, JD
Lin, CS
Linacre, J
Lindgren, M
Lipeles, E
Liss, TM
Lister, A
Litvintsev, DO
Liu, C
Liu, T
Lockyer, NS
Loginov, A
Loreti, M
Lovas, L
Lucchesi, D
Luci, C
Lueck, J
Lujan, P
Lukens, P
Lungu, G
Lyons, L
Lys, J
Lysak, R
MacQueen, D
Madrak, R
Maeshima, K
Makhoul, K
Maki, T
Maksimovic, P
Malde, S
Malik, S
Manca, G
Manousakis-Katsikakis, A
Margaroli, F
Marino, C
Marino, CP
Martin, A
Martin, V
Martinez, M
Martinez-Ballarin, R
Maruyama, T
Mastrandrea, P
Masubuchi, T
Mathis, M
Mattson, ME
Mazzanti, P
McFarland, KS
McIntyre, P
McNulty, R
Mehta, A
Mehtala, P
Menzione, A
Merkel, P
Mesropian, C
Miao, T
Miladinovic, N
Miller, R
Mills, C
Milnik, M
Mitra, A
Mitselmakher, G
Miyake, H
Moggi, N
Moon, CS
Moore, R
Morello, MJ
Morlock, J
Fernandez, PM
Mulmenstadt, J
Mukherjee, A
Muller, T
Mumford, R
Murat, P
Mussini, M
Nachtman, J
Nagai, Y
Nagano, A
Naganoma, J
Nakamura, K
Nakano, I
Napier, A
Necula, V
Nett, J
Neu, C
Neubauer, MS
Neubauer, S
Nielsen, J
Nodulman, L
Norman, M
Norniella, O
Nurse, E
Oakes, L
Oh, SH
Oh, YD
Oksuzian, I
Okusawa, T
Orava, R
Osterberg, K
Griso, SP
Palencia, E
Papadimitriou, V
Papaikonomou, A
Paramonov, AA
Parks, B
Pashapour, S
Patrick, J
Pauletta, G
Paulini, M
Paus, C
Peiffer, T
Pellett, DE
Penzo, A
Phillips, TJ
Piacentino, G
Pianori, E
Pinera, L
Pitts, K
Plager, C
Pondrom, L
Poukhov, O
Pounder, N
Prakoshyn, F
Pronko, A
Proudfoot, J
Ptohos, F
Pueschel, E
Punzi, G
Pursley, J
Rademacker, J
Rahaman, A
Ramakrishnan, V
Ranjan, N
Redondo, I
Renton, P
Renz, M
Rescigno, M
Richter, S
Rimondi, F
Ristori, L
Robson, A
Rodrigo, T
Rodriguez, T
Rogers, E
Rolli, S
Roser, R
Rossi, M
Rossin, R
Roy, P
Ruiz, A
Russ, J
Rusu, V
Rutherford, B
Saarikko, H
Safonov, A
Sakumoto, WK
Salto, O
Santi, L
Sarkar, S
Sartori, L
Sato, K
Savoy-Navarro, A
Schlabach, P
Schmidt, A
Schmidt, EE
Schmidt, MA
Schmidt, MP
Schmitt, M
Schwarz, T
Scodellaro, L
Scribano, A
Scuri, F
Sedov, A
Seidel, S
Seiya, Y
Semenov, A
Sexton-Kennedy, L
Sforza, F
Sfyrla, A
Shalhout, SZ
Shears, T
Shepard, PF
Shimojima, M
Shiraishi, S
Shochet, M
Shon, Y
Shreyber, I
Sidoti, A
Sinervo, P
Sisakyan, A
Slaughter, AJ
Slaunwhite, J
Sliwa, K
Smith, JR
Snider, FD
Snihur, R
Soha, A
Somalwar, S
Sorin, V
Spalding, J
Spreitzer, T
Squillacioti, P
Stanitzki, M
Denis, RS
Stelzer, B
Stelzer-Chilton, O
Stentz, D
Strologas, J
Strycker, GL
Stuart, D
Suh, JS
Sukhanov, A
Suslov, I
Suzuki, T
Taffard, A
Takashima, R
Takeuchi, Y
Tanaka, R
Tecchio, M
Teng, PK
Terashi, K
Thom, J
Thompson, AS
Thompson, GA
Thomson, E
Tipton, P
Ttito-Guzman, P
Tkaczyk, S
Toback, D
Tokar, S
Tollefson, K
Tomura, T
Tonelli, D
Torre, S
Torretta, D
Totaro, P
Tourneur, S
Trovato, M
Tsai, SY
Tu, Y
Turini, N
Ukegawa, F
Vallecorsa, S
van Remortel, N
Varganov, A
Vataga, E
Vazquez, F
Velev, G
Vellidis, C
Vidal, M
Vidal, R
Vila, I
Vilar, R
Vine, T
Vogel, M
Volobouev, I
Volpi, G
Wagner, P
Wagner, RG
Wagner, RL
Wagner, W
Wagner-Kuhr, J
Wakisaka, T
Wallny, R
Wang, SM
Warburton, A
Waters, D
Weinberger, M
Weinelt, J
Wester, WC
Whitehouse, B
Whiteson, D
Wicklund, AB
Wicklund, E
Wilbur, S
Williams, G
Williams, HH
Wilson, P
Winer, BL
Wittich, P
Wolbers, S
Wolfe, C
Wright, T
Wu, X
Wurthwein, F
Xie, S
Yagil, A
Yamamoto, K
Yamaoka, J
Yang, UK
Yang, YC
Yao, WM
Yeh, GP
Yoh, J
Yorita, K
Yoshida, T
Yu, GB
Yu, I
Yu, SS
Yun, JC
Zanello, L
Zanetti, A
Zhang, X
Zheng, Y
Zucchelli, S
AF Aaltonen, T.
Adelman, J.
Akimoto, T.
Alvarez Gonzalez, B.
Amerio, S.
Amidei, D.
Anastassov, A.
Annovi, A.
Antos, J.
Apollinari, G.
Apresyan, A.
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Ashmanskas, W.
Attal, A.
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Barnett, B. A.
Bartsch, V.
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Beauchemin, P. -H.
Bedeschi, F.
Beecher, D.
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Bellinger, J.
Benjamin, D.
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Binkley, M.
Bisello, D.
Bizjak, I.
Blair, R. E.
Blocker, C.
Blumenfeld, B.
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Bodek, A.
Boisvert, V.
Bolla, G.
Bortoletto, D.
Boudreau, J.
Boveia, A.
Brau, B.
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Brigliadori, L.
Bromberg, C.
Brubaker, E.
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Bussey, P.
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Campbell, M.
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Canepa, A.
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Carlsmith, D.
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Carrillo, S.
Carron, S.
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Casarsa, M.
Castro, A.
Catastini, P.
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Cavaliere, V.
Cavalli-Sforza, M.
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Cerrito, L.
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Chen, Y. C.
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Chiarelli, G.
Chlachidze, G.
Chlebana, F.
Cho, K.
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Choudalakis, G.
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Chung, Y. S.
Chwalek, T.
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Ciocci, M. A.
Clark, A.
Clark, D.
Compostella, G.
Convery, M. E.
Conway, J.
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Cortiana, G.
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Cuevas, J.
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de Barbaro, P.
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Deisher, A.
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Dell'Orso, M.
Deluca, C.
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Derwent, P. F.
di Giovanni, G. P.
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Dittmann, J. R.
D'Onofrio, M.
Donati, S.
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Gerdes, D.
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Lammel, S.
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Latino, G.
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Lee, E.
Lee, H. S.
Lee, S. W.
Leone, S.
Lewis, J. D.
Lin, C. -S.
Linacre, J.
Lindgren, M.
Lipeles, E.
Liss, T. M.
Lister, A.
Litvintsev, D. O.
Liu, C.
Liu, T.
Lockyer, N. S.
Loginov, A.
Loreti, M.
Lovas, L.
Lucchesi, D.
Luci, C.
Lueck, J.
Lujan, P.
Lukens, P.
Lungu, G.
Lyons, L.
Lys, J.
Lysak, R.
MacQueen, D.
Madrak, R.
Maeshima, K.
Makhoul, K.
Maki, T.
Maksimovic, P.
Malde, S.
Malik, S.
Manca, G.
Manousakis-Katsikakis, A.
Margaroli, F.
Marino, C.
Marino, C. P.
Martin, A.
Martin, V.
Martinez, M.
Martinez-Ballarin, R.
Maruyama, T.
Mastrandrea, P.
Masubuchi, T.
Mathis, M.
Mattson, M. E.
Mazzanti, P.
McFarland, K. S.
McIntyre, P.
McNulty, R.
Mehta, A.
Mehtala, P.
Menzione, A.
Merkel, P.
Mesropian, C.
Miao, T.
Miladinovic, N.
Miller, R.
Mills, C.
Milnik, M.
Mitra, A.
Mitselmakher, G.
Miyake, H.
Moggi, N.
Moon, C. S.
Moore, R.
Morello, M. J.
Morlock, J.
Fernandez, P. Movilla
Muelmenstaedt, J.
Mukherjee, A.
Muller, Th.
Mumford, R.
Murat, P.
Mussini, M.
Nachtman, J.
Nagai, Y.
Nagano, A.
Naganoma, J.
Nakamura, K.
Nakano, I.
Napier, A.
Necula, V.
Nett, J.
Neu, C.
Neubauer, M. S.
Neubauer, S.
Nielsen, J.
Nodulman, L.
Norman, M.
Norniella, O.
Nurse, E.
Oakes, L.
Oh, S. H.
Oh, Y. D.
Oksuzian, I.
Okusawa, T.
Orava, R.
Osterberg, K.
Griso, S. Pagan
Palencia, E.
Papadimitriou, V.
Papaikonomou, A.
Paramonov, A. A.
Parks, B.
Pashapour, S.
Patrick, J.
Pauletta, G.
Paulini, M.
Paus, C.
Peiffer, T.
Pellett, D. E.
Penzo, A.
Phillips, T. J.
Piacentino, G.
Pianori, E.
Pinera, L.
Pitts, K.
Plager, C.
Pondrom, L.
Poukhov, O.
Pounder, N.
Prakoshyn, F.
Pronko, A.
Proudfoot, J.
Ptohos, F.
Pueschel, E.
Punzi, G.
Pursley, J.
Rademacker, J.
Rahaman, A.
Ramakrishnan, V.
Ranjan, N.
Redondo, I.
Renton, P.
Renz, M.
Rescigno, M.
Richter, S.
Rimondi, F.
Ristori, L.
Robson, A.
Rodrigo, T.
Rodriguez, T.
Rogers, E.
Rolli, S.
Roser, R.
Rossi, M.
Rossin, R.
Roy, P.
Ruiz, A.
Russ, J.
Rusu, V.
Rutherford, B.
Saarikko, H.
Safonov, A.
Sakumoto, W. K.
Salto, O.
Santi, L.
Sarkar, S.
Sartori, L.
Sato, K.
Savoy-Navarro, A.
Schlabach, P.
Schmidt, A.
Schmidt, E. E.
Schmidt, M. A.
Schmidt, M. P.
Schmitt, M.
Schwarz, T.
Scodellaro, L.
Scribano, A.
Scuri, F.
Sedov, A.
Seidel, S.
Seiya, Y.
Semenov, A.
Sexton-Kennedy, L.
Sforza, F.
Sfyrla, A.
Shalhout, S. Z.
Shears, T.
Shepard, P. F.
Shimojima, M.
Shiraishi, S.
Shochet, M.
Shon, Y.
Shreyber, I.
Sidoti, A.
Sinervo, P.
Sisakyan, A.
Slaughter, A. J.
Slaunwhite, J.
Sliwa, K.
Smith, J. R.
Snider, F. D.
Snihur, R.
Soha, A.
Somalwar, S.
Sorin, V.
Spalding, J.
Spreitzer, T.
Squillacioti, P.
Stanitzki, M.
Denis, R. St.
Stelzer, B.
Stelzer-Chilton, O.
Stentz, D.
Strologas, J.
Strycker, G. L.
Stuart, D.
Suh, J. S.
Sukhanov, A.
Suslov, I.
Suzuki, T.
Taffard, A.
Takashima, R.
Takeuchi, Y.
Tanaka, R.
Tecchio, M.
Teng, P. K.
Terashi, K.
Thom, J.
Thompson, A. S.
Thompson, G. A.
Thomson, E.
Tipton, P.
Ttito-Guzman, P.
Tkaczyk, S.
Toback, D.
Tokar, S.
Tollefson, K.
Tomura, T.
Tonelli, D.
Torre, S.
Torretta, D.
Totaro, P.
Tourneur, S.
Trovato, M.
Tsai, S. -Y.
Tu, Y.
Turini, N.
Ukegawa, F.
Vallecorsa, S.
van Remortel, N.
Varganov, A.
Vataga, E.
Vazquez, F.
Velev, G.
Vellidis, C.
Vidal, M.
Vidal, R.
Vila, I.
Vilar, R.
Vine, T.
Vogel, M.
Volobouev, I.
Volpi, G.
Wagner, P.
Wagner, R. G.
Wagner, R. L.
Wagner, W.
Wagner-Kuhr, J.
Wakisaka, T.
Wallny, R.
Wang, S. M.
Warburton, A.
Waters, D.
Weinberger, M.
Weinelt, J.
Wester, W. C., III
Whitehouse, B.
Whiteson, D.
Wicklund, A. B.
Wicklund, E.
Wilbur, S.
Williams, G.
Williams, H. H.
Wilson, P.
Winer, B. L.
Wittich, P.
Wolbers, S.
Wolfe, C.
Wright, T.
Wu, X.
Wuerthwein, F.
Xie, S.
Yagil, A.
Yamamoto, K.
Yamaoka, J.
Yang, U. K.
Yang, Y. C.
Yao, W. M.
Yeh, G. P.
Yoh, J.
Yorita, K.
Yoshida, T.
Yu, G. B.
Yu, I.
Yu, S. S.
Yun, J. C.
Zanello, L.
Zanetti, A.
Zhang, X.
Zheng, Y.
Zucchelli, S.
CA CDF Collaboration
TI Search for Top-Quark Production via Flavor-Changing Neutral Currents in
W+1 Jet Events at CDF
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID EP COLLISIONS; DECAYS; PHYSICS; HERA
AB We report on a search for the non-standard-model process u(c)+g -> t using pp collision data collected by the Collider Detector at Fermilab II detector corresponding to 2.2 fb(-1). The candidate events are classified as signal-like or backgroundlike by an artificial neural network. The observed discriminant distribution yields no evidence for flavor-changing neutral current top-quark production, resulting in an upper limit on the production cross section sigma(u(c)+g -> t)< 1.8 pb at the 95% C.L. Using theoretical predictions we convert the cross section limit to upper limits on flavor-changing neutral current branching ratios: B(t -> u+g)< 3.9x10(-4) and B(t -> c+g)< 5.7x10(-3).
C1 [Aaltonen, T.; Maki, T.; Mehtala, P.; Orava, R.; Osterberg, K.; Robson, A.; Saarikko, H.; van Remortel, N.] Univ Helsinki, Div High Energy Phys, Dept Phys, FIN-00014 Helsinki, Finland.
[Aaltonen, T.] Helsinki Inst Phys, FIN-00014 Helsinki, Finland.
[Chen, Y. C.; Hou, S.; Martin, V.; Mitra, A.; Teng, P. K.; Tsai, S. -Y.; Wang, S. M.] Acad Sinica, Inst Phys, Taipei 11529, Taiwan.
[Blair, R. E.; Byrum, K. L.; LeCompte, T.; Nodulman, L.; Proudfoot, J.; Wagner, R. G.; Wicklund, A. B.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Giakoumopoulou, V.; Giokaris, N.; Manousakis-Katsikakis, A.; Vellidis, C.] Univ Athens, Athens 15771, Greece.
[Attal, A.; Cavalli-Sforza, M.; De Lorenzo, G.; Deluca, C.; D'Onofrio, M.; Martinez, M.; Salto, O.] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Bellaterra, Barcelona, Spain.
[Dittmann, J. R.; Frank, M. J.; Hewamanage, S.; Krumnack, N.] Baylor Univ, Waco, TX 76798 USA.
[Castro, A.; Deninno, M.; Jha, M. K.; Mazzanti, P.; Moggi, N.; Mussini, M.; Rimondi, F.; Zucchelli, S.] Ist Nazl Fis Nucl, I-40127 Bologna, Italy.
[Castro, A.; Mussini, M.; Rimondi, F.; Zucchelli, S.] Univ Bologna, I-40127 Bologna, Italy.
[Blocker, C.; Clark, D.; Kirsch, L.; Miladinovic, N.] Brandeis Univ, Waltham, MA 02254 USA.
[Chertok, M.; Conway, J.; Cox, C. A.; Cox, D. J.; Almenar, C. Cuenca; Erbacher, R.; Forrest, R.; Ivanov, A.; Johnson, W.; Lander, R. L.; Lister, A.; Pellett, D. E.; Schwarz, T.; Smith, J. R.; Soha, A.] Univ Calif Davis, Davis, CA 95616 USA.
[Dong, P.; Plager, C.; Wallny, R.; Zheng, Y.] Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
[Hill, C. S.; Norman, M.; Wuerthwein, F.; Yagil, A.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[Boveia, A.; Brau, B.; Garberson, F.; Incandela, J.; Krutelyov, V.; Rossin, R.; Stuart, D.] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
[Alvarez Gonzalez, B.; Casal, B.; Cuevas, J.; Gomez, G.; Rodrigo, T.; Ruiz, A.; Scodellaro, L.; Vila, I.; Vilar, R.] Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain.
[Chung, K.; Galyardt, J.; Jang, D.; Jun, S. Y.; Paulini, M.; Pueschel, E.; Russ, J.] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
[Adelman, J.; Brubaker, E.; Canelli, F.; Fedorko, W. T.; Grosso-Pilcher, C.; Kim, Y. K.; Krop, D.; Kwang, S.; Lee, H. S.; Paramonov, A. A.; Schmidt, M. A.; Shiraishi, S.; Shochet, M.; Wilbur, S.; Wolfe, C.; Yang, U. K.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
[Antos, J.; Lovas, L.; Lysak, R.; Tokar, S.] Comenius Univ, Bratislava 84248, Slovakia.
[Antos, J.; Lovas, L.; Lysak, R.; Tokar, S.] Inst Expt Phys, Kosice 04001, Slovakia.
[Artikov, A.; Budagov, J.; Chokheli, D.; Glagolev, V.; Poukhov, O.; Prakoshyn, F.; Semenov, A.; Sisakyan, A.; Suslov, I.] Joint Inst Nucl Res, RU-141980 Dubna, Russia.
[Benjamin, D.; Bocci, A.; Cabrera, S.; Deng, J.; Goshaw, A. T.; Hidas, D.; Jayatilaka, B.; Ko, B. R.; Kotwal, A. V.; Kruse, M.; Necula, V.; Oh, S. H.; Phillips, T. J.; Yamaoka, J.] Duke Univ, Durham, NC 27708 USA.
[Apollinari, G.; Ashmanskas, W.; Badgett, W.; Beretvas, A.; Binkley, M.; Burke, S.; Burkett, K.; Canelli, F.; Casarsa, M.; Chlachidze, G.; Chlebana, F.; Convery, M. E.; Culbertson, R.; Dagenhart, D.; Datta, M.; Derwent, P. F.; Eusebi, R.; Freeman, J. C.; Genser, K.; Ginsburg, C. M.; Glenzinski, D.; Golossanov, A.; Group, R. C.; Hahn, S. R.; Harris, R. M.; Hocker, A.; James, E.; Jindariani, S.; Junk, T. R.; Kephart, R.; Kilminster, B.; Lammel, S.; Lewis, J. D.; Lindgren, M.; Litvintsev, D. O.; Liu, T.; Lukens, P.; Madrak, R.; Maeshima, K.; Miao, T.; Moore, R.; Fernandez, P. Movilla; Mukherjee, A.; Murat, P.; Nachtman, J.; Palencia, E.; Papadimitriou, V.; Patrick, J.; Pronko, A.; Ptohos, F.; Roser, R.; Rusu, V.; Rutherford, B.; Sato, K.; Schlabach, P.; Schmidt, E. E.; Sexton-Kennedy, L.; Slaughter, A. J.; Snider, F. D.; Spalding, J.; Thom, J.; Tkaczyk, S.; Tonelli, D.; Torretta, D.; Velev, G.; Vidal, R.; Wagner, R. L.; Wester, W. C., III; Wicklund, E.; Wilson, P.; Wittich, P.; Wolbers, S.; Yeh, G. P.; Yoh, J.; Yu, S. S.; Yun, J. C.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Annovi, A.; Cordelli, M.; Giromini, P.; Happacher, F.; Kim, M. J.; Torre, S.] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
[Clark, A.; Garcia, J. E.; Vallecorsa, S.; Wu, X.] Univ Geneva, CH-1211 Geneva 4, Switzerland.
[Bussey, P.; Davies, T.; Martin, V.; Denis, R. St.; Thompson, A. S.] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland.
[Chou, J. P.; Franklin, M.; Grinstein, S.; da Costa, J. Guimaraes; Mills, C.] Harvard Univ, Cambridge, MA 02138 USA.
[Bridgeman, A.; Budd, S.; Carls, B.; Errede, D.; Errede, S.; Gerberich, H.; Grundler, U.; Liss, T. M.; Marino, C. P.; Neubauer, M. S.; Norniella, O.; Pitts, K.; Rogers, E.; Sfyrla, A.; Taffard, A.; Thompson, G. A.; Zhang, X.] Univ Illinois, Urbana, IL 61801 USA.
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[Chwalek, T.; Feindt, M.; Gessler, A.; Heck, M.; Heuser, J.; Hirschbuehl, D.; Kreps, M.; Kuhr, T.; Lueck, J.; Marino, C.; Milnik, M.; Morlock, J.; Muller, Th.; Neubauer, S.; Papaikonomou, A.; Peiffer, T.; Renz, M.; Richter, S.; Schmidt, A.; Wagner, W.; Wagner-Kuhr, J.; Weinelt, J.] Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany.
[Chang, S. H.; Cho, K.; Jeon, E. J.; Joo, K. K.; Jung, J. E.; Kim, D. H.; Kim, H. S.; Kim, H. W.; Kim, J. E.; Kim, S. B.; Kong, D. J.; Moon, C. S.; Oh, Y. D.; Suh, J. S.; Yang, Y. C.; Yu, I.] Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea.
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[Chang, S. H.; Cho, K.; Jeon, E. J.; Joo, K. K.; Jung, J. E.; Kim, D. H.; Kim, H. S.; Kim, H. W.; Kim, J. E.; Kim, S. B.; Kong, D. J.; Moon, C. S.; Oh, Y. D.; Suh, J. S.; Yang, Y. C.; Yu, I.] Korea Inst Sci & Technol Informat, Taejon 305806, South Korea.
[Chang, S. H.; Cho, K.; Jeon, E. J.; Joo, K. K.; Jung, J. E.; Kim, D. H.; Kim, H. S.; Moon, C. S.; Oh, Y. D.; Suh, J. S.; Yang, Y. C.; Yu, I.] Chonnam Natl Univ, Kwangju 500757, South Korea.
[Barbaro-Galtieri, A.; Beringer, J.; Cerri, A.; Deisher, A.; Fang, H. C.; Haber, C.; Hsu, S. -C.; Lin, C. -S.; Lujan, P.; Lys, J.; Muelmenstaedt, J.; Nielsen, J.; Volobouev, I.; Yao, W. M.] Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Houlden, M.; Manca, G.; McNulty, R.; Mehta, A.; Shears, T.] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England.
[Bartsch, V.; Beecher, D.; Bizjak, I.; Cerrito, L.; Lancaster, M.; Malik, S.; Nurse, E.; Vine, T.; Waters, D.] UCL, London WC1E 6BT, England.
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[Bauer, G.; Choudalakis, G.; Gomez-Ceballos, G.; Goncharov, M.; Hahn, K.; Henderson, C.; Knuteson, B.; Makhoul, K.; Paus, C.; Xie, S.] MIT, Cambridge, MA 02139 USA.
[Beauchemin, P. -H.; Buzatu, A.; Carron, S.; MacQueen, D.; Pashapour, S.; Roy, P.; Sinervo, P.; Snihur, R.; Spreitzer, T.; Stelzer, B.; Stelzer-Chilton, O.; Warburton, A.; Williams, G.] McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada.
[Beauchemin, P. -H.; Buzatu, A.; Carron, S.; MacQueen, D.; Pashapour, S.; Roy, P.; Sinervo, P.; Snihur, R.; Spreitzer, T.; Stelzer, B.; Stelzer-Chilton, O.; Warburton, A.; Williams, G.] Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada.
[Beauchemin, P. -H.; Buzatu, A.; Carron, S.; MacQueen, D.; Pashapour, S.; Roy, P.; Sinervo, P.; Snihur, R.; Spreitzer, T.; Stelzer, B.; Stelzer-Chilton, O.; Warburton, A.; Williams, G.] Univ Toronto, Toronto, ON M5S 1A7, Canada.
[Beauchemin, P. -H.; Buzatu, A.; Carron, S.; MacQueen, D.; Pashapour, S.; Roy, P.; Sinervo, P.; Snihur, R.; Spreitzer, T.; Stelzer, B.; Stelzer-Chilton, O.; Warburton, A.; Williams, G.] TRIUMF, Vancouver, BC V6T 2A3, Canada.
[Amidei, D.; Campbell, M.; Cully, J. C.; Gerdes, D.; Strycker, G. L.; Tecchio, M.; Varganov, A.; Wright, T.] Univ Michigan, Ann Arbor, MI 48109 USA.
[Bromberg, C.; Campanelli, M.; Gunay-Unalan, Z.; Hussein, M.; Huston, J.; Miller, R.; Sorin, V.; Tollefson, K.] Michigan State Univ, E Lansing, MI 48824 USA.
[Shreyber, I.] ITEP, Moscow 117259, Russia.
[Gold, M.; Gorelov, I.; Seidel, S.; Strologas, J.; Vogel, M.] Univ New Mexico, Albuquerque, NM 87131 USA.
[Anastassov, A.; Schmitt, M.; Stentz, D.] Northwestern Univ, Evanston, IL 60208 USA.
[Efron, J.; Hughes, R. E.; Lannon, K.; Parks, B.; Slaunwhite, J.; Winer, B. L.] Ohio State Univ, Columbus, OH 43210 USA.
[Nakano, I.; Takashima, R.; Tanaka, R.] Okayama Univ, Okayama 7008530, Japan.
[Kato, Y.; Okusawa, T.; Seiya, Y.; Wakisaka, T.; Yamamoto, K.; Yoshida, T.] Osaka City Univ, Osaka 588, Japan.
[Azfar, F.; Farrington, S.; Harper, S.; Hays, C.; Huffman, B. T.; Linacre, J.; Lyons, L.; Malde, S.; Oakes, L.; Pounder, N.; Rademacker, J.; Renton, P.] Univ Oxford, Oxford OX1 3RH, England.
[Amerio, S.; Bisello, D.; Brigliadori, L.; Busetto, G.; Compostella, G.; Cortiana, G.; Donini, J.; Dorigo, T.; Gresele, A.; Lazzizzera, I.; Loreti, M.; Lucchesi, D.; Griso, S. Pagan] Ist Nazl Fis Nucl, Sez Padova Trento, I-35131 Padua, Italy.
[Amerio, S.; Bisello, D.; Busetto, G.; Cortiana, G.; Gresele, A.; Lazzizzera, I.; Loreti, M.; Lucchesi, D.; Griso, S. Pagan] Univ Padua, I-35131 Padua, Italy.
[Ciobanu, C. I.; di Giovanni, G. P.; Savoy-Navarro, A.; Tourneur, S.] Univ Paris 06, LPNHE, IN2P3, CNRS,UMR7585, F-75252 Paris, France.
[Canepa, A.; Heijboer, A.; Heinrich, J.; Keung, J.; Kroll, J.; Lipeles, E.; Lockyer, N. S.; Neu, C.; Pianori, E.; Rodriguez, T.; Thomson, E.; Tu, Y.; Wagner, P.; Whiteson, D.; Williams, H. H.] Univ Penn, Philadelphia, PA 19104 USA.
[Azzurri, P.; Bedeschi, F.; Bellettini, G.; Carosi, R.; Catastini, P.; Cavaliere, V.; Chiarelli, G.; Ciocci, M. A.; Crescioli, F.; Dell'Orso, M.; Donati, S.; Ferrazza, C.; Giannetti, P.; Giunta, M.; Introzzi, G.; Lami, S.; Latino, G.; Leone, S.; Menzione, A.; Morello, M. J.; Piacentino, G.; Punzi, G.; Ristori, L.; Sartori, L.; Scribano, A.; Scuri, F.; Sforza, F.; Sidoti, A.; Squillacioti, P.; Trovato, M.; Turini, N.; Vataga, E.; Volpi, G.] Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
[Azzurri, P.; Bellettini, G.; Crescioli, F.; Dell'Orso, M.; Donati, S.; Giunta, M.; Morello, M. J.; Punzi, G.; Volpi, G.] Univ Pisa, I-56127 Pisa, Italy.
[Catastini, P.; Cavaliere, V.; Ciocci, M. A.; Latino, G.; Scribano, A.; Squillacioti, P.; Turini, N.] Univ Siena, I-56127 Pisa, Italy.
[Ferrazza, C.; Vataga, E.] Scuola Normale Super Pisa, I-56127 Pisa, Italy.
[Boudreau, J.; Gibson, K.; Hartz, M.; Liu, C.; Rahaman, A.; Shepard, P. F.] Univ Pittsburgh, Pittsburgh, PA 15260 USA.
[Apresyan, A.; Barnes, V. E.; Bolla, G.; Bortoletto, D.; Flanagan, G.; Garfinkel, A. F.; Jones, M.; Laasanen, A. T.; Margaroli, F.; Merkel, P.; Ranjan, N.; Sedov, A.] Purdue Univ, W Lafayette, IN 47907 USA.
[Bodek, A.; Boisvert, V.; Budd, H. S.; Chung, Y. S.; de Barbaro, P.; Gimmell, J. L.; Han, B. -Y.; Han, J. Y.; McFarland, K. S.; Sakumoto, W. K.; Yu, G. B.] Univ Rochester, Rochester, NY 14627 USA.
[Bhatti, A.; Demortier, L.; Goulianos, K.; Hatakeyama, K.; Lungu, G.; Mesropian, C.; Terashi, K.] Rockefeller Univ, New York, NY 10021 USA.
[Mastrandrea, P.; Rescigno, M.; Sarkar, S.; Zanello, L.] Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, Italy.
[Sarkar, S.; Zanello, L.] Sapienza Univ Roma, I-00185 Rome, Italy.
[Chuang, S. H.; Dube, S.; Halkiadakis, E.; Hare, D.; Lath, A.; Somalwar, S.] Rutgers State Univ, Piscataway, NJ 08855 USA.
[Aurisano, A.; Elagin, A.; Kamon, T.; Khotilovich, V.; Lee, E.; Lee, S. W.; McIntyre, P.; Safonov, A.; Toback, D.; Weinberger, M.] Texas A&M Univ, College Stn, TX 77843 USA.
[Pauletta, G.; Penzo, A.; Rossi, M.; Santi, L.; Totaro, P.; Zanetti, A.] Ist Nazl Fis Nucl Trieste Udine, I-34100 Trieste, Italy.
[Pauletta, G.; Santi, L.; Totaro, P.] Univ Trieste Udine, I-33100 Udine, Italy.
[Akimoto, T.; Hara, K.; Kim, S. H.; Kimura, N.; Kubo, T.; Kurata, M.; Maruyama, T.; Masubuchi, T.; Miyake, H.; Nagai, Y.; Nagano, A.; Naganoma, J.; Nakamura, K.; Shimojima, M.; Suzuki, T.; Takeuchi, Y.; Tomura, T.; Ukegawa, F.] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan.
[Hare, M.; Napier, A.; Rolli, S.; Sliwa, K.; Whitehouse, B.] Tufts Univ, Medford, MA 02155 USA.
[Arisawa, T.; Kondo, K.; Yorita, K.] Waseda Univ, Tokyo 169, Japan.
[Harr, R. F.; Karchin, P. E.; Kulkarni, N. P.; Mattson, M. E.; Shalhout, S. Z.] Wayne State Univ, Detroit, MI 48201 USA.
[Bellinger, J.; Carlsmith, D.; Chung, W. H.; Herndon, M.; Nett, J.; Pondrom, L.; Pursley, J.; Ramakrishnan, V.; Shon, Y.] Univ Wisconsin, Madison, WI 53706 USA.
[Field, R.; Husemann, U.; Loginov, A.; Martin, A.; Schmidt, M. P.; Stanitzki, M.; Tipton, P.] Yale Univ, New Haven, CT 06520 USA.
[Carrillo, S.; Field, R.; Furic, I.; Goldschmidt, N.; Kar, D.; Klimenko, S.; Konigsberg, J.; Korytov, A.; Mitselmakher, G.; Oksuzian, I.; Pinera, L.; Sukhanov, A.; Vazquez, F.] Univ Florida, Gainesville, FL 32611 USA.
RP Aaltonen, T (reprint author), Univ Helsinki, Div High Energy Phys, Dept Phys, FIN-00014 Helsinki, Finland.
RI Introzzi, Gianluca/K-2497-2015; Gorelov, Igor/J-9010-2015; Xie,
Si/O-6830-2016; Canelli, Florencia/O-9693-2016; Chiarelli,
Giorgio/E-8953-2012; Scodellaro, Luca/K-9091-2014; Grinstein,
Sebastian/N-3988-2014; Paulini, Manfred/N-7794-2014; Russ,
James/P-3092-2014; unalan, zeynep/C-6660-2015; Lazzizzera,
Ignazio/E-9678-2015; vilar, rocio/P-8480-2014; Cabrera Urban,
Susana/H-1376-2015; Garcia, Jose /H-6339-2015; ciocci, maria agnese
/I-2153-2015; Cavalli-Sforza, Matteo/H-7102-2015; Muelmenstaedt,
Johannes/K-2432-2015; Campbell, Michelle/B-5793-2008; Ruiz,
Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco,
Sandro/B-1016-2012; manca, giulia/I-9264-2012; Amerio,
Silvia/J-4605-2012; Punzi, Giovanni/J-4947-2012; Annovi,
Alberto/G-6028-2012; Ivanov, Andrew/A-7982-2013; Warburton,
Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014; Lysak,
Roman/H-2995-2014; Moon, Chang-Seong/J-3619-2014
OI Hays, Chris/0000-0003-2371-9723; Farrington, Sinead/0000-0001-5350-9271;
Robson, Aidan/0000-0002-1659-8284; Gallinaro,
Michele/0000-0003-1261-2277; Torre, Stefano/0000-0002-7565-0118; Turini,
Nicola/0000-0002-9395-5230; Osterberg, Kenneth/0000-0003-4807-0414;
Giordani, Mario/0000-0002-0792-6039; Casarsa,
Massimo/0000-0002-1353-8964; Vidal Marono, Miguel/0000-0002-2590-5987;
Latino, Giuseppe/0000-0002-4098-3502; iori,
maurizio/0000-0002-6349-0380; Lancaster, Mark/0000-0002-8872-7292;
Nielsen, Jason/0000-0002-9175-4419; Jun, Soon Yung/0000-0003-3370-6109;
Toback, David/0000-0003-3457-4144; Introzzi,
Gianluca/0000-0002-1314-2580; Gorelov, Igor/0000-0001-5570-0133; Xie,
Si/0000-0003-2509-5731; Canelli, Florencia/0000-0001-6361-2117; Lami,
Stefano/0000-0001-9492-0147; Margaroli, Fabrizio/0000-0002-3869-0153;
Group, Robert/0000-0002-4097-5254; Chiarelli,
Giorgio/0000-0001-9851-4816; Scodellaro, Luca/0000-0002-4974-8330;
Grinstein, Sebastian/0000-0002-6460-8694; Paulini,
Manfred/0000-0002-6714-5787; Russ, James/0000-0001-9856-9155; unalan,
zeynep/0000-0003-2570-7611; Lazzizzera, Ignazio/0000-0001-5092-7531;
ciocci, maria agnese /0000-0003-0002-5462; Muelmenstaedt,
Johannes/0000-0003-1105-6678; Ruiz, Alberto/0000-0002-3639-0368; Punzi,
Giovanni/0000-0002-8346-9052; Annovi, Alberto/0000-0002-4649-4398;
Ivanov, Andrew/0000-0002-9270-5643; Warburton,
Andreas/0000-0002-2298-7315; Moon, Chang-Seong/0000-0001-8229-7829
FU U. S. Department of Energy and National Science Foundation; Italian
Istituto Nazionale di Fisica Nucleare; Ministry of Education, Culture,
Sports, Science and Technology of Japan; Natural Sciences and
Engineering Research Council of Canada; National Science Council of the
Republic of China; Swiss National Science Foundation; A. P. Sloan
Foundation; Bundesministerium fur Bildung und Forschung, Germany; Korean
Science and Engineering Foundation and the Korean Research Foundation;
Science and Technology Facilities Council and the Royal Society, U. K.;
Institut National de Physique Nucleaire et Physique des Particules/CNRS;
Russian Foundation for Basic Research; Ministerio de Ciencia e
Innovacion, and Programa Consolider-Ingenio 2010, Spain; Slovak RD
Agency; Academy of Finland
FX The authors express their gratitude to Chong Sheng Li of Peking
University for very useful communication and for providing a new
calculation of FCNC top-quark branching ratios in a very timely fashion.
We thank the Fermilab staff and the technical staffs of the
participating institutions for their vital contributions. This work was
supported by the U. S. Department of Energy and National Science
Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the
Ministry of Education, Culture, Sports, Science and Technology of Japan;
the Natural Sciences and Engineering Research Council of Canada; the
National Science Council of the Republic of China; the Swiss National
Science Foundation; the A. P. Sloan Foundation; the Bundesministerium
fur Bildung und Forschung, Germany; the Korean Science and Engineering
Foundation and the Korean Research Foundation; the Science and
Technology Facilities Council and the Royal Society, U. K.; the Institut
National de Physique Nucleaire et Physique des Particules/CNRS; the
Russian Foundation for Basic Research; the Ministerio de Ciencia e
Innovacion, and Programa Consolider-Ingenio 2010, Spain; the Slovak R&D
Agency; and the Academy of Finland.
NR 30
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 17
PY 2009
VL 102
IS 15
AR 151801
DI 10.1103/PhysRevLett.102.151801
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 434PD
UT WOS:000265285700013
ER
PT J
AU Burrell, KH
Osborne, TH
Snyder, PB
West, WP
Fenstermacher, ME
Groebner, RJ
Gohil, P
Leonard, AW
Solomon, WM
AF Burrell, K. H.
Osborne, T. H.
Snyder, P. B.
West, W. P.
Fenstermacher, M. E.
Groebner, R. J.
Gohil, P.
Leonard, A. W.
Solomon, W. M.
TI Quiescent H-Mode Plasmas with Strong Edge Rotation in the Cocurrent
Direction
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DIII-D; ASDEX UPGRADE; STABILITY; PEDESTAL; REGIME; OPERATION; TOKAMAK;
JT-60U; ELMS
AB For the first time in any tokamak, quiescent H-mode (QH-mode) plasmas have been created with strong edge rotation in the direction of the plasma current. This confirms the theoretical prediction that the QH mode should exist with either sign of the edge rotation provided the magnitude of the shear in the edge rotation is sufficiently large and demonstrates that counterinjection and counteredge rotation are not essential for the QH mode. Accordingly, the present work demonstrates a substantial broadening of the QH-mode operating space and represents a significant confirmation of the theory.
C1 [Burrell, K. H.; Osborne, T. H.; Snyder, P. B.; West, W. P.; Groebner, R. J.; Gohil, P.; Leonard, A. W.] Gen Atom Co, San Diego, CA 92186 USA.
[Fenstermacher, M. E.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Solomon, W. M.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Burrell, KH (reprint author), Gen Atom Co, POB 85608, San Diego, CA 92186 USA.
OI Solomon, Wayne/0000-0002-0902-9876
FU U. S. Department of Energy [DE-FC02-04ER54698, DE-AC52-07NA27344,
DE-AC02-76CH03073]
FX This work was supported by the U. S. Department of Energy under No.
DE-FC02-04ER54698, No. DE-AC52-07NA27344, and No. DE-AC02-76CH03073.
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 17
PY 2009
VL 102
IS 15
AR 155003
DI 10.1103/PhysRevLett.102.155003
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WC Physics, Multidisciplinary
SC Physics
GA 434PD
UT WOS:000265285700037
PM 19518641
ER
PT J
AU Cheng, G
Graessley, WW
Melnichenko, YB
AF Cheng, G.
Graessley, W. W.
Melnichenko, Y. B.
TI Polymer Dimensions in Good Solvents: Crossover from Semidilute to
Concentrated Solutions
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ANGLE NEUTRON-SCATTERING; MEAN-SQUARE RADIUS; POLY(METHYL
METHACRYLATE)S; CRITICAL EXPONENTS; CHAIN DIMENSIONS; GYRATION
AB Using small-angle neutron scattering, we studied the variation of the polymer radius of gyration (R(g)) as a function of polymer concentration (phi) for solutions of a flexible-chain poly(methyl methacrylate) in chloroform. We observed for the first time a distinct crossover between swollen coils in the semidilute regime, where R(g)(2)proportional to phi(-0.26 +/- 0.03), and unperturbed coils in the concentrated regime, where R(g) is independent on concentration. The crossover occurs at phi(>)approximate to 0.15, a value that agrees reasonably well with phi approximate to 0.21 +/- 0.035, estimated with a scaling relationship between phi and the coil overlap concentration phi(*).
C1 [Cheng, G.; Melnichenko, Y. B.] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
[Graessley, W. W.] Princeton Univ, Dept Chem Engn, Princeton, NJ 08544 USA.
RP Melnichenko, YB (reprint author), Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
EM melnichenkoy@ornl.gov
FU U.S. Department of Energy [DE-AC05-00OR22725]
FX The authors thank M. Osa for suggesting the polymersolvent system
studied in this work and G. D. Wignall for his careful reading of the
manuscript and helpful remarks. Research was sponsored by the Division
of Materials Sciences and Engineering, Office of Basic Energy Sciences,
U.S. Department of Energy, under Contract No. DE-AC05-00OR22725 with Oak
Ridge National Laboratory, managed and operated by UT-Battelle, LLC.
This research was supported in part by the ORNL Postdoctoral Research
Associates Program, administered jointly by the ORNL and the Oak Ridge
Institute for Science and Education.
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 17
PY 2009
VL 102
IS 15
AR 157801
DI 10.1103/PhysRevLett.102.157801
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 434PD
UT WOS:000265285700069
PM 19518673
ER
PT J
AU Chipps, KA
Bardayan, DW
Blackmon, JC
Chae, KY
Greife, U
Hatarik, R
Kozub, RL
Matei, C
Moazen, BH
Nesaraja, CD
Pain, SD
Peters, WA
Pittman, ST
Shriner, JF
Smith, MS
AF Chipps, K. A.
Bardayan, D. W.
Blackmon, J. C.
Chae, K. Y.
Greife, U.
Hatarik, R.
Kozub, R. L.
Matei, C.
Moazen, B. H.
Nesaraja, C. D.
Pain, S. D.
Peters, W. A.
Pittman, S. T.
Shriner, J. F., Jr.
Smith, M. S.
TI First Direct Measurement of the F-17(p,gamma)Ne-18 Cross Section
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DARESBURY RECOIL SEPARATOR; NOVA NUCLEOSYNTHESIS; RADIOACTIVE BEAMS;
CAPTURE REACTION; REACTION-RATES; RP-PROCESS; NE-18; F-17(P; ENERGIES;
STATE
AB The rate of the F-17(p,gamma)Ne-18 reaction is important in various astrophysical events. A previous F-17(p,p)F-17 measurement identified a 3(+) state providing the strongest resonance contribution, but the resonance strength was unknown. We have directly measured the F-17(p,gamma)Ne-18 reaction using a mixed beam of F-17 and O-17 at ORNL. The resonance strength for the 3(+) resonance in Ne-18 was found to be omega gamma=33 +/- 14(stat)+/- 17(syst) meV, corresponding to a gamma width of Gamma(gamma)=56 +/- 24(stat)+/- 30(syst) meV. An upper limit on the direct capture of S(E)<= 65 keV b was determined at an energy of 800 keV.
C1 [Chipps, K. A.; Greife, U.] Colorado Sch Mines, Golden, CO 80401 USA.
[Blackmon, J. C.] Louisiana State Univ, Baton Rouge, LA 70803 USA.
[Chae, K. Y.; Moazen, B. H.; Nesaraja, C. D.; Pain, S. D.; Pittman, S. T.] Univ Tennessee, Knoxville, TN 37996 USA.
[Hatarik, R.; Peters, W. A.] Rutgers State Univ, New Brunswick, NJ 08901 USA.
[Kozub, R. L.; Shriner, J. F., Jr.] Tennessee Technol Univ, Cookeville, TN 38505 USA.
[Matei, C.] Oak Ridge Associated Univ, Oak Ridge, TN 37830 USA.
RP Chipps, KA (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RI Pain, Steven/E-1188-2011; Peters, William/B-3214-2012; Matei,
Catalin/B-2586-2008;
OI Pain, Steven/0000-0003-3081-688X; Peters, William/0000-0002-3022-4924;
Matei, Catalin/0000-0002-2254-3853; Chipps, Kelly/0000-0003-3050-1298
FU U. S. Department of Energy (DOE) [DE-AC05-00OR22725, DE-FG03-93ER40789,
DE-FG02-96ER40990]
FX Oak Ridge National Laboratory is managed by UT-Battelle, LLC, for the U.
S. Department of Energy (DOE) under Contract No. DE-AC05-00OR22725. This
work was also supported in part by the U. S. DOE under Contract No.
DE-FG03-93ER40789 with the Colorado School of Mines and No.
DE-FG02-96ER40990 with Tennessee Technological University.
NR 26
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PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 17
PY 2009
VL 102
IS 15
AR 152502
DI 10.1103/PhysRevLett.102.152502
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 434PD
UT WOS:000265285700020
PM 19518624
ER
PT J
AU Coverdale, CA
Safronova, AS
Kantsyrev, VL
Ouart, ND
Esaulov, AA
Deeney, C
Williamson, KM
Osborne, GC
Shrestha, I
Ampleford, DJ
Jones, B
AF Coverdale, C. A.
Safronova, A. S.
Kantsyrev, V. L.
Ouart, N. D.
Esaulov, A. A.
Deeney, C.
Williamson, K. M.
Osborne, G. C.
Shrestha, I.
Ampleford, D. J.
Jones, B.
TI Observation of > 400-eV Precursor Plasmas from Low-Wire-Number Copper
Arrays at the 1-MA Zebra Facility
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID Z-PINCH; X-PINCHES; DYNAMICS; MODEL; MA
AB Experiments with cylindrical copper wire arrays at the 1-MA Zebra facility show that high temperatures exist in the precursor plasmas formed when ablated wire array material accretes on the axis prior to the stagnation of a z pinch. In these experiments, the precursor radiated approximately 20% of the > 1000 eV x-ray output, and time-resolved spectra show substantial emission from Cu L-shell lines. Modeling of the spectra shows an increase in temperature as the precursor forms, up to similar to 450 eV, after which the temperature decreases to similar to 220-320 eV until the main implosion.
C1 [Coverdale, C. A.; Ampleford, D. J.; Jones, B.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Safronova, A. S.; Kantsyrev, V. L.; Ouart, N. D.; Esaulov, A. A.; Williamson, K. M.; Osborne, G. C.; Shrestha, I.] Univ Nevada, Reno, NV 89557 USA.
[Deeney, C.] Natl Nucl Secur Adm, Washington, DC USA.
RP Coverdale, CA (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
FU U. S. DOE's National Nuclear Security Administration
[DE-AC04-94AL85000]; DOE/NNSA Cooperative [DE-FC52-06NA27616,
DE-FC52-06NA27588, DE-FC52-06NA27586]; National Physical Science
Consortium; Sandia National Laboratories
FX The authors would like to thank the Nevada Terawatt Facility and the
assistance of S. Batie, A. Astanovitsky, B. LeGalloudec, T. Adkins, and
V. Nalajala; S. Bott and F. Beg of University of California, San Diego,
S. Lebedev and J. Chittenden of Imperial College, J. P. Apruzese of the
Naval Research Lab, and V. V. Ivanov of University of Nevada, Reno, for
useful discussions; and P. D. LePell of Ktech Corporation for helping
develop the time-gated spectrometer. Sandia is a multiprogram laboratory
operated by Sandia Corporation, a Lockheed Martin Company, for the U. S.
DOE's National Nuclear Security Administration under Contract No.
DE-AC04-94AL85000. Work was also supported by the DOE/NNSA Cooperative
agreements DE-FC52-06NA27616, DE-FC52-06NA27588, and DE-FC52-06NA27586
and in part by support from the National Physical Science Consortium
with Sandia National Laboratories.
NR 19
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PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 17
PY 2009
VL 102
IS 15
AR 155006
DI 10.1103/PhysRevLett.102.155006
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 434PD
UT WOS:000265285700040
PM 19518644
ER
PT J
AU Ghaemi, P
Wang, F
Vishwanath, A
AF Ghaemi, Pouyan
Wang, Fa
Vishwanath, Ashvin
TI Andreev Bound States as a Phase-Sensitive Probe of the Pairing Symmetry
of the Iron Pnictide Superconductors
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SPECTROSCOPY; GAP
AB A leading contender for the pairing symmetry in the Fe pnictide high-temperature superconductors is extended s wave s(+/-), a nodeless state in which the pairing changes sign between Fermi surfaces. Verifying such a pairing symmetry requires a special phase-sensitive probe that is also momentum selective. We show that the sign structure of s(+/-) pairing can lead to surface Andreev bound states (ABS) at the sample edge. In the clean limit they only occur when the edge is along the nearest neighbor Fe-Fe bond, but not for a diagonal edge or a surface orthogonal to the c axis. In contrast to d-wave ABS, they are not at zero energy and, in general, do not produce a zero bias tunneling peak. Consequences for tunneling measurements are derived, within a simplified two-band model and also for a more realistic five-band model. In both cases, surface ABS are obtained.
C1 [Ghaemi, Pouyan; Wang, Fa; Vishwanath, Ashvin] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Wang, Fa; Vishwanath, Ashvin] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Ghaemi, P (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RI Wang, Fa/D-3817-2015
OI Wang, Fa/0000-0002-6220-5349
FU LBNL [DOE504108]
FX We acknowledge support from LBNL Grant No. DOE504108 and instructive
discussions with Dung-Hai Lee.
NR 24
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PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 17
PY 2009
VL 102
IS 15
AR 157002
DI 10.1103/PhysRevLett.102.157002
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 434PD
UT WOS:000265285700064
PM 19518668
ER
PT J
AU Huang, W
Wang, LS
AF Huang, Wei
Wang, Lai-Sheng
TI Probing the 2D to 3D Structural Transition in Gold Cluster Anions Using
Argon Tagging
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID PHOTOELECTRON-SPECTROSCOPY; METAL CLUSTERS; ACTIVE GOLD; NANOCLUSTERS;
OXIDATION
AB Different physisorption properties by 2D and 3D isomers of Au(n)- clusters are observed and used to probe the 2D to 3D structural transition. Strong Ar clustering occurs on planar Au(n)- and the planar faces of the pyramidal Au(20)-. An abrupt change of Ar clustering at Au(12)- confirms the 2D to 3D structural transition at this size, where both isomers coexist. The minor 2D isomer can be titrated out by Ar to produce a clean 3D-Au(12)- beam and beams of Au(12)Ar(m)- with enhanced 2D isomers. Using the Ar titration and tagging, isomer-specific photoelectron spectra for the 2D and 3D Au(12)- are obtained.
C1 [Huang, Wei] Washington State Univ, Dept Phys, Richland, WA 99354 USA.
Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA.
RP Huang, W (reprint author), Washington State Univ, Dept Phys, 2710 Univ Dr, Richland, WA 99354 USA.
EM ls.wang@pnl.gov
FU National Science Foundation [CHE-0749496]; DOE's Office of Biological
and Environmental Research
FX We thank Professor Xiao Cheng Zeng and Professor Max Bertino for
valuable discussions. This work was supported by the National Science
Foundation ( No. CHE-0749496) and performed at the W. R. Wiley
Environmental Molecular Sciences Laboratory, a national scientific user
facility sponsored by DOE's Office of Biological and Environmental
Research and located at Pacific Northwest National Laboratory, operated
for DOE by Battelle.
NR 24
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PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 17
PY 2009
VL 102
IS 15
AR 153401
DI 10.1103/PhysRevLett.102.153401
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 434PD
UT WOS:000265285700026
PM 19518630
ER
PT J
AU Kharzeev, D
Levin, E
Nardi, M
Tuchin, K
AF Kharzeev, Dmitri
Levin, Eugene
Nardi, Marzia
Tuchin, Kirill
TI Gluon Saturation Effects on J/psi Production in Heavy Ion Collisions
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID COLOR GLASS CONDENSATE; ENERGY PA-COLLISIONS; HIGH-DENSITY QCD;
RENORMALIZATION-GROUP; NUCLEUS COLLISIONS; HADRON-PRODUCTION; QUARK;
DISSOCIATION; MOMENTUM; EQUATION
AB We consider a novel mechanism for J/psi production in nuclear collisions arising due to the high density of gluons. The resulting J/psi production cross section is evaluated as a function of rapidity and centrality. We compute the nuclear modification factor and show that the rapidity distribution of the produced J/psi's is significantly more narrow in AA collisions due to the gluon saturation effects. Our results indicate that gluon saturation in the colliding nuclei is a significant source of J/psi suppression and can explain the experimentally observed rapidity and centrality dependencies of the effect.
C1 [Kharzeev, Dmitri] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
[Levin, Eugene] Tel Aviv Univ, HEP Dept, Sch Phys, Raymond & Beverly Sackler Fac Exact Sci, IL-69978 Tel Aviv, Israel.
[Nardi, Marzia] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy.
[Tuchin, Kirill] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Tuchin, Kirill] RIKEN, BNL Res Ctr, Upton, NY 11973 USA.
RP Kharzeev, D (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
FU U. S. Department of Energy [DE-AC02-98CH10886, DE-FG02-87ER40371];
RIKEN; BNL; Ministry of Science, Culture Sport, Israel; Russian
Foundation for Basic Research; Russian Federation; BSF [20004019]
FX The work of D. K. was supported by the U. S. Department of Energy under
Contract No. DE-AC02-98CH10886. K. T. was supported in part by the U. S.
Department of Energy under Grant No. DE-FG02-87ER40371; he thanks RIKEN,
BNL, and the U. S. Department of Energy (Contract No. DE-AC02-98CH10886)
for providing facilities essential for the completion of this work. This
research of E. L. was supported in part by a grant from Ministry of
Science, Culture & Sport, Israel and the Russian Foundation for Basic
Research of the Russian Federation and by BSF Grant No. 20004019.
NR 38
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U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 17
PY 2009
VL 102
IS 15
AR 152301
DI 10.1103/PhysRevLett.102.152301
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 434PD
UT WOS:000265285700018
PM 19518622
ER
PT J
AU Wakimoto, S
Kimura, H
Ishii, K
Ikeuchi, K
Adachi, T
Fujita, M
Kakurai, K
Koike, Y
Mizuki, J
Noda, Y
Yamada, K
Said, AH
Shvyd'ko, Y
AF Wakimoto, S.
Kimura, H.
Ishii, K.
Ikeuchi, K.
Adachi, T.
Fujita, M.
Kakurai, K.
Koike, Y.
Mizuki, J.
Noda, Y.
Yamada, K.
Said, A. H.
Shvyd'ko, Yu.
TI Charge Excitations in the Stripe-Ordered La5/3Sr1/3NiO4 and
La2-x(Ba,Sr)(x)CuO4 Superconducting Compounds
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID X-RAY-SCATTERING; COPPER-OXIDE SUPERCONDUCTORS; ELECTRONIC-STRUCTURE;
SPIN; LA2-XSRXNIO4; SPECTRA; PLANE
AB Charge excitations in stripe-ordered 214 compounds La5/3Sr1/3NiO4 and 1/8-doped La2-x(Ba or Sr)(x)CuO4 are studied using resonant inelastic x-ray scattering in the hard x-ray regime. We observe similar or equal to 1 eV excitation with a momentum transfer corresponding to the charge stripe spatial period both for the diagonal (nickelate) and parallel (cuprates) stripes. They are interpreted as collective stripe excitations or anomalous softening of the charge excitonic modes of the in-gap states.
C1 [Wakimoto, S.; Kakurai, K.] Japan Atom Energy Agcy, Quantum Beam Sci Directorate, Tokai, Ibaraki 3191195, Japan.
[Kimura, H.; Noda, Y.] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan.
[Ishii, K.; Ikeuchi, K.; Mizuki, J.] Japan Atom Energy Agcy, Synchrotron Radiat Res Ctr, Mikazuki, Hyogo 6795148, Japan.
[Adachi, T.; Koike, Y.] Tohoku Univ, Dept Appl Phys, Sendai, Miyagi 9808579, Japan.
[Fujita, M.; Yamada, K.] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan.
[Yamada, K.] Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan.
[Said, A. H.; Shvyd'ko, Yu.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Wakimoto, S (reprint author), Japan Atom Energy Agcy, Quantum Beam Sci Directorate, Tokai, Ibaraki 3191195, Japan.
EM wakimoto.shuichi@jaea.go.jp
RI Yamada, Kazuyoshi/C-2728-2009; Fujita, Masaki/D-8430-2013
FU Ministry of Education, Culture, Sports, Science and Technology, Japan;
U.S. Department of Energy [DE-AC02-06CH11357]
FX The authors thank E. Kaneshita, K. Machida, K. Nakajima, and K. Tsutsui
for invaluable discussions. Yu. Sh. acknowledges the long-standing
efforts of his colleagues from the IXS Collaborative Design Team in
building the MERIX instrument at the 30-ID beam line at the APS, in
particular: J.P. Hill, D. S. Coburn (BNL), C. Burns (WMU), E. Alp, T.
Toellner, H. Sinn (APS), and D. P. Siddons (BNL) for building the
microstrip detector for the MERIX spectrometer. This work is supported
by a Grant-In-Aid from the Ministry of Education, Culture, Sports,
Science and Technology, Japan. The synchrotron radiation experiments at
SPring-8 were performed under the Common-Use Facility Programme of JAEA.
Use of the APS was supported by the U.S. Department of Energy, Office of
Science, Office of Basic Energy Sciences, under Contract No.
DE-AC02-06CH11357.
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U2 14
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 17
PY 2009
VL 102
IS 15
AR 157001
DI 10.1103/PhysRevLett.102.157001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 434PD
UT WOS:000265285700063
PM 19518667
ER
PT J
AU Walsh, A
Da Silva, JLF
Wei, SH
AF Walsh, Aron
Da Silva, Juarez L. F.
Wei, Su-Huai
TI Comment on "Theoretical Description of Carrier Mediated Magnetism in
Cobalt Doped ZnO'' Reply
SO PHYSICAL REVIEW LETTERS
LA English
DT Editorial Material
AB A Reply to the Comment by Stefano Sanvito and Chaitanya Das Pemmaraju.
C1 [Walsh, Aron; Da Silva, Juarez L. F.; Wei, Su-Huai] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Walsh, A (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
RI Walsh, Aron/A-7843-2008; Da Silva, Juarez L. F./D-1779-2011
OI Walsh, Aron/0000-0001-5460-7033; Da Silva, Juarez L.
F./0000-0003-0645-8760
NR 11
TC 7
Z9 7
U1 1
U2 13
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 17
PY 2009
VL 102
IS 15
AR 159702
DI 10.1103/PhysRevLett.102.159702
PG 1
WC Physics, Multidisciplinary
SC Physics
GA 434PD
UT WOS:000265285700079
ER
PT J
AU Warusawithana, MP
Cen, C
Sleasman, CR
Woicik, JC
Li, YL
Kourkoutis, LF
Klug, JA
Li, H
Ryan, P
Wang, LP
Bedzyk, M
Muller, DA
Chen, LQ
Levy, J
Schlom, DG
AF Warusawithana, Maitri P.
Cen, Cheng
Sleasman, Charles R.
Woicik, Joseph C.
Li, Yulan
Kourkoutis, Lena Fitting
Klug, Jeffrey A.
Li, Hao
Ryan, Philip
Wang, Li-Peng
Bedzyk, Michael
Muller, David A.
Chen, Long-Qing
Levy, Jeremy
Schlom, Darrell G.
TI A Ferroelectric Oxide Made Directly on Silicon
SO SCIENCE
LA English
DT Article
ID THIN-FILMS; PEROVSKITE FILMS; ULTRATHIN FILMS; SRTIO3; MULTILAYERS;
THICKNESS; GROWTH
AB Metal oxide semiconductor field-effect transistors, formed using silicon dioxide and silicon, have undergone four decades of staggering technological advancement. With fundamental limits to this technology close at hand, alternatives to silicon dioxide are being pursued to enable new functionality and device architectures. We achieved ferroelectric functionality in intimate contact with silicon by growing coherently strained strontium titanate (SrTiO3) films via oxide molecular beam epitaxy in direct contact with silicon, with no interfacial silicon dioxide. We observed ferroelectricity in these ultrathin SrTiO3 layers by means of piezoresponse force microscopy. Stable ferroelectric nanodomains created in SrTiO3 were observed at temperatures as high as 400 kelvin.
C1 [Warusawithana, Maitri P.; Schlom, Darrell G.] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA.
[Cen, Cheng; Sleasman, Charles R.; Levy, Jeremy] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA.
[Woicik, Joseph C.] NIST, Gaithersburg, MD 20899 USA.
[Li, Yulan; Chen, Long-Qing] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA.
[Kourkoutis, Lena Fitting; Muller, David A.] Cornell Univ, Sch Appl & Engn Phys, Ithaca, NY 14853 USA.
[Klug, Jeffrey A.; Bedzyk, Michael] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA.
[Li, Hao] Motorola Inc, Appl Res & Technol Ctr, Tempe, AZ 85284 USA.
[Ryan, Philip] Ames Lab, Ames, IA 50011 USA.
[Wang, Li-Peng] Intel Corp, Santa Clara, CA 95052 USA.
[Wang, Li-Peng] TricornTech, San Jose, CA 95129 USA.
[Bedzyk, Michael] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.
RP Schlom, DG (reprint author), Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA.
EM schlom@cornell.edu
RI Schlom, Darrell/J-2412-2013; Bedzyk, Michael/B-7503-2009; Bedzyk,
Michael/K-6903-2013; Chen, LongQing/I-7536-2012; Levy,
Jeremy/A-2081-2009; Muller, David/A-7745-2010; Klug, Jeffrey/A-3653-2013
OI Schlom, Darrell/0000-0003-2493-6113; Chen, LongQing/0000-0003-3359-3781;
Levy, Jeremy/0000-0002-5700-2977; Muller, David/0000-0003-4129-0473;
Kourkoutis, Lena/0000-0002-1303-1362;
FU Office of Naval Research [N00014-04-1-0426]; NSF [DMR-0507146,
DMR-0704022]; Materials Research Science and Engineering Center
[DMR-0520404, DMR-0520513, DMR-0820404]; U.S. Department of Energy,
Basic Energy Sciences, Office of Science [W-31-109-ENG-38]
FX We thank C. H. Ahn, O. Auciello, V. Gopalan, D. A. Tenne, and F. J.
Walker for stimulating discussions and interactions during the course of
this work. Supported by Office of Naval Research grant N00014-04-1-0426
(M.P.W., L.F.K., D.A.M., and D.G.S.), NSF grants DMR-0507146 and
DMR-0704022, Materials Research Science and Engineering Center program
grants DMR-0520404, DMR-0520513, and DMR-0820404, and, for the work
performed at Argonne National Laboratory, the U.S. Department of Energy,
Basic Energy Sciences, Materials Sciences. Diffraction data were taken
at sector 33BM of the Advanced Photon Source, which is supported by the
U.S. Department of Energy, Basic Energy Sciences, Office of Science
under contract W-31-109-ENG-38.
NR 32
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U2 215
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
EI 1095-9203
J9 SCIENCE
JI Science
PD APR 17
PY 2009
VL 324
IS 5925
BP 367
EP 370
DI 10.1126/science.1169678
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 433QT
UT WOS:000265221600036
PM 19372426
ER
PT J
AU Huang, J
Lyczkowski, RW
Gidaspow, D
AF Huang, Jing
Lyczkowski, Robert W.
Gidaspow, Dimitri
TI Pulsatile flow in a coronary artery using multiphase kinetic theory
SO JOURNAL OF BIOMECHANICS
LA English
DT Article
DE Computational fluid dynamics; Blood viscosity; Fahraeus-Lindqvist
effect; Wall shear stress; Wall shear stress gradients
ID COMPUTATIONAL FLUID-DYNAMICS; SIMULATED BLOOD-FLOW; CURVED TUBE MODEL;
SHEAR-STRESS; CAROTID BIFURCATION; TRANSIENT FLOW; VASCULAR ENDOTHELIUM;
WALL; ATHEROSCLEROSIS; HEMODYNAMICS
AB Pulsatile flow in a model of a right coronary artery (RCA) was previously modeled as a single-phase fluid and as a two-phase fluid using experimental rheological data for blood as a function of hematocrit and shear rate. Here we present a multiphase kinetic theory model which has been shown to compute correctly the viscosity of red blood cells (RBCs) and their migration away from vessel walls: the Fahraeus-Lindqvist effect. The computed RBC viscosity decreases with shear rate and vessel size, consistent with measurements. The pulsatile computations were performed using a typical cardiac waveform until a limit cycle was well established. The RBC volume fractions, shear stresses, shear stress gradients, granular temperatures, viscosities, and phase velocities varied with time and position during each cardiac cycle. Steady-state computations were also performed and were found to compare well with time-averaged transient results. The wall shear stress and wall shear stress gradients (both spatial and temporal) were found to be highest on the inside area of Maximum curvature. Potential atherosclerosis sites are identified using these computational results. (C) 2009 Elsevier Ltd. All rights reserved.
C1 [Lyczkowski, Robert W.] Argonne Natl Lab, Div Energy Syst, Argonne, IL 60439 USA.
[Huang, Jing; Gidaspow, Dimitri] IIT, Dept Biol & Chem Engn, Chicago, IL 60616 USA.
RP Lyczkowski, RW (reprint author), Argonne Natl Lab, Div Energy Syst, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM rlyczkowski@anl.gov
NR 56
TC 12
Z9 13
U1 2
U2 10
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0021-9290
J9 J BIOMECH
JI J. Biomech.
PD APR 16
PY 2009
VL 42
IS 6
BP 743
EP 754
DI 10.1016/j.jbiomech.2009.01.038
PG 12
WC Biophysics; Engineering, Biomedical
SC Biophysics; Engineering
GA 436WS
UT WOS:000265447400011
PM 19278682
ER
PT J
AU Zhang, Y
Liu, KH
Lagi, M
Liu, D
Littrell, KC
Mou, CY
Chen, SH
AF Zhang, Yang
Liu, Kao-Hsiang
Lagi, Marco
Liu, Dazhi
Littrell, Kenneth C.
Mou, Chung-Yuan
Chen, Sow-Hsin
TI Absence of the Density Minimum of Supercooled Water in Hydrophobic
Confinement
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID VOIGT FUNCTION; GLASSY WATER; X-RAY; DIFFRACTION; TRANSITION; INTERFACE;
LIQUID; LINE
AB The surface effect on the peculiar dynamic and thermodynamic properties of supercooled water, such as the density, has been puzzling the scientific community for years. Recently, using the small angle neutron scattering method, we were able to measure the density of H(2)O confined in the hydrophobic mesoporous material CMK1-14 from room temperature down to the deeply supercooled temperature 130 K at ambient pressure. We found that the well-known density maximum of water is shifted 17 K lower and, more interestingly, that the previously observed density minimum in hydrophilic confinement disappears. Furthermore, the deduced thermal expansion coefficient shows a much broader peak spanning from 240 to 180 K in comparison with the sharp peak at 230 K in hydrophilic confinement. These present results may help in the understanding of the effect of hydrophobic/hydrophilic interfaces on the properties of supercooled confined water.
C1 [Zhang, Yang; Lagi, Marco; Chen, Sow-Hsin] MIT, Dept Nucl Sci & Engn, Cambridge, MA 02139 USA.
[Liu, Kao-Hsiang; Mou, Chung-Yuan] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan.
[Liu, Dazhi; Littrell, Kenneth C.] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
RP Chen, SH (reprint author), MIT, Dept Nucl Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
EM sowhsin@mit.edu
RI Lagi, Marco/A-4100-2008; Zhang, Yang/A-7975-2012; Liu,
Dazhi/G-2675-2013; Littrell, Kenneth/D-2106-2013
OI Zhang, Yang/0000-0002-7339-8342; MOU, CHUNG-YUAN/0000-0001-7060-9899;
Liu, Dazhi/0000-0002-7604-6940; Littrell, Kenneth/0000-0003-2308-8618
FU Department of Energy [DE-FG02-90ER45429]; Taiwan National Science
Council [NSC952120-M-002-009, NSC96-2739-M-213-001]; Oak Ridge National
Laboratory's High Flux Isotope Reactor; Scientific User Facilities
Division, Office of Basic Energy Sciences, U.S. Department of Energy;
European Union Marie Curie Research and Training Network on Arrested
Matte
FX Research at MIT is supported by Department of Energy Grant
DE-FG02-90ER45429; at NTU, it is supported by Taiwan National Science
Council Grants NSC952120-M-002-009 and NSC96-2739-M-213-001. The neutron
scattering experiment at Oak Ridge National Laboratory's High Flux
Isotope Reactor was sponsored by the Scientific User Facilities
Division, Office of Basic Energy Sciences, U.S. Department of Energy. We
benefited from affiliation with European Union Marie Curie Research and
Training Network on Arrested Matter. The authors appreciate the efforts
of C. Redmon and D. Reass of the ORNL NSSD sample environments group in
designing, fabricating, and testing the sample holders used in this
work.
NR 24
TC 26
Z9 27
U1 0
U2 15
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD APR 16
PY 2009
VL 113
IS 15
BP 5007
EP 5010
DI 10.1021/jp900641y
PG 4
WC Chemistry, Physical
SC Chemistry
GA 430ZG
UT WOS:000265030500006
PM 19317391
ER
PT J
AU Gregg, BA
AF Gregg, Brian A.
TI Transport in Charged Defect-Rich pi-Conjugated Polymers
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Letter
ID ORGANIC SEMICONDUCTORS; SOLAR-CELLS; POLY(3-HEXYLTHIOPHENE); SIMULATION;
MOBILITY
AB Some models of charge transport in pi-conjugated polymers treat these materials as if they were electrical insulators. Although this may be appropriate for a few materials, many polymers are effectively doped p-type by a high density of charged defects. Herein, limits are estimated for the charged defect density above which the resulting electrostatic fluctuations may govern transport and for the corresponding free hole density above which space-charge-limited currents should not occur. These limits are lower than the experimentally observed values in many pi-conjugated polymers, suggesting that these materials are more accurately described by models of doped semiconductors. This analysis also provides an explanation for two otherwise puzzling experimental observations, the low-field Poole-Frenkel mobility and the correlated energetic disorder.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Gregg, BA (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
NR 26
TC 36
Z9 36
U1 0
U2 17
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD APR 16
PY 2009
VL 113
IS 15
BP 5899
EP 5901
DI 10.1021/jp900616g
PG 3
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 430ZD
UT WOS:000265030200003
ER
PT J
AU Sun, YG
Pelton, M
AF Sun, Yugang
Pelton, Matthew
TI Laser-Driven Growth of Silver Nanoplates on p-Type GaAs Substrates and
Their Surface-Enhanced Raman Scattering Activity
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID SHAPE-CONTROLLED SYNTHESIS; KINETICALLY CONTROLLED SYNTHESIS; GALVANIC
REPLACEMENT REACTION; SOLAR-ENERGY CONVERSION; LARGE-SCALE SYNTHESIS;
OPTICAL-PROPERTIES; GOLD NANOCRYSTALS; METAL NANOPARTICLES; POLYOL
SYNTHESIS; SINGLE-MOLECULE
AB Contact between aqueous solutions of silver nitrate (AgNO(3)) and pristine surfaces of p-type gallium arsenide (GaAs) wafers results in essentially no reaction at room temperature and in the dark. The galvanic reactions between the GaAs wafers and AgNO(3) can be triggered under illumination of laser beams with power densities higher than a critical value (similar to 15 mW/cm(2) for a 630 nm laser), resulting in the growth of silver (Ag) nanoplates on the GaAs surface. The density and dimensions (including both thickness and edge length) of the resulting nanoplates can be readily tuned by controlling the growth time and laser power density. The as-grown Ag nanoplates on the substrates significantly enhance Raman signals of interesting molecules and serve as a new class of promising surface-enhanced Raman scattering substrates for sensitive chemical detection.
C1 [Sun, Yugang; Pelton, Matthew] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Sun, YG (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM ygsun@anl.gov
RI Sun, Yugang /A-3683-2010; Pelton, Matthew/H-7482-2013
OI Sun, Yugang /0000-0001-6351-6977; Pelton, Matthew/0000-0002-6370-8765
NR 83
TC 9
Z9 9
U1 1
U2 13
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD APR 16
PY 2009
VL 113
IS 15
BP 6061
EP 6067
DI 10.1021/jp900638m
PG 7
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 430ZD
UT WOS:000265030200029
ER
PT J
AU Aliaga, C
Park, JY
Yamada, Y
Lee, HS
Tsung, CK
Yang, PD
Somorjai, GA
AF Aliaga, Cesar
Park, Jeong Y.
Yamada, Yusuke
Lee, Hyun Sook
Tsung, Chia-Kuang
Yang, Peidong
Somorjai, Gabor A.
TI Sum Frequency Generation and Catalytic Reaction Studies of the Removal
of Organic Capping Agents from Pt Nanoparticles by UV-Ozone Treatment
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID SINGLE-CRYSTAL SURFACES; VIBRATIONAL SPECTROSCOPY; HETEROGENEOUS
CATALYSIS; PLATINUM NANOPARTICLES; ETHYLENE HYDROGENATION; RHODIUM
NANOPARTICLES; CO OXIDATION; NANOCRYSTALS; ADSORPTION; KINETICS
AB We report the structure of the organic capping layers of platinum colloid nanoparticles and their removal by UV-ozone exposure. Sum frequency generation vibrational spectroscopy (SFGVS) studies identify the carbon-hydrogen stretching modes on poly(vinylpyrrolidone) (PVP) and tetradecyl tributylammonium bromide (TTAB)-capped platinum nanoparticles. We found that the UV-ozone treatment technique effectively removes the capping layer on the basis of several analytical measurements including SFGVS, X-ray photoelectron spectroscopy, and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The overall shape of the nanoparticles was preserved after the removal of capping layers, as confirmed by transmission electron microscopy (TEM). SFGVS of ethylene hydrogenation on the clean platinum nanoparticles demonstrates the existence of ethylidyne and di-sigma-bonded species, indicating the similarity between single-crystal and nanoparticle systems.
C1 [Somorjai, Gabor A.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM somorjai@berkeley.edu
RI Park, Jeong Young/A-2999-2008; Yamada, Yusuke/D-3359-2013
FU Office of Basic Energy Sciences, Division of Chemical Sciences,
Geological and Biosciences; Division of Materials Sciences and
Engineering of the U.S. Department of Energy [DE-AC02-05CH 11231]; Korea
Research Foundation; Korean Government
FX This work was supported by the Director, Office of Science, Office of
Basic Energy Sciences, Division of Chemical Sciences, Geological and
Biosciences and Division of Materials Sciences and Engineering of the
U.S. Department of Energy under contract no. DE-AC02-05CH 11231. H.S.L
gratefully acknowledges financial aid from the Korea Research Foundation
Grant funded by the Korean Government.
NR 35
TC 133
Z9 133
U1 10
U2 110
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD APR 16
PY 2009
VL 113
IS 15
BP 6150
EP 6155
DI 10.1021/jp8108946
PG 6
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 430ZD
UT WOS:000265030200041
ER
PT J
AU Senanayake, SD
Gordon, WO
Overbury, SH
Mullins, DR
AF Senanayake, S. D.
Gordon, W. O.
Overbury, S. H.
Mullins, D. R.
TI Adsorption and Reaction of Acetone over CeOx(111) Thin Films
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID CERIUM OXIDE; SINGLE-CRYSTAL; SURFACES; DECOMPOSITION; SPECTROSCOPY;
TIO2(110); SI(100); CO
AB This study reports the interaction of acetone (CH3COCH3) the simplest ketone, with well ordered CeO2(111) thin film surfaces. The fully oxidized CeO2(111) surface shows a weak interaction with acetone with the sole desorption product (TPD) being acetone at 210 K. The chemisorbed molecule binds to the surface as the eta(1)-acetone species rather than through a bridge-bonded dioxy-configuration. Exposure of a CeO2(111) surface to acetone at 600K removes oxygen as CO and results in the conversion of Ce4+ to Ce3+. Acetone chemisorbs strongly on reduced CeO2-x(111) with molecular acetone desorbing near 500 K. Decomposition also occurs with H-2 desorbing between 450 and 600 K and C reacting with O in the ceria to desorb above 650 K. A stable species exists from 200 to 500 K on the reduced surface that has three unique types of C. High resolution C 1s XPS spectra indicate these are Cc-CH2, C-(C) under barH(3) and C-O species. C k-edge NEXAFS indicates the presence of C=C and C=O bonds. It is postulated that the intermediate is a carbanion bonded through both O and C atoms to Ce cations.
C1 [Senanayake, S. D.; Gordon, W. O.; Overbury, S. H.; Mullins, D. R.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Mullins, DR (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM mullinsdr@ornl.gov
RI Overbury, Steven/C-5108-2016; Senanayake, Sanjaya/D-4769-2009
OI Overbury, Steven/0000-0002-5137-3961; Senanayake,
Sanjaya/0000-0003-3991-4232
NR 23
TC 29
Z9 29
U1 2
U2 48
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD APR 16
PY 2009
VL 113
IS 15
BP 6208
EP 6214
DI 10.1021/jp810403d
PG 7
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 430ZD
UT WOS:000265030200049
ER
PT J
AU Koehn, EM
Fleischmann, T
Conrad, JA
Palfey, BA
Lesley, SA
Mathews, II
Kohen, A
AF Koehn, Eric M.
Fleischmann, Todd
Conrad, John A.
Palfey, Bruce A.
Lesley, Scott A.
Mathews, Irimpan I.
Kohen, Amnon
TI An unusual mechanism of thymidylate biosynthesis in organisms containing
the thyX gene
SO NATURE
LA English
DT Article
ID CATALYTIC MECHANISM; ESCHERICHIA-COLI; ACTIVE-SITE; SYNTHASE-X; FLAVIN;
ENZYME; DNA
AB Biosynthesis of the DNA base thymine depends on activity of the enzyme thymidylate synthase to catalyse the methylation of the uracil moiety of 2'-deoxyuridine-5'-monophosphate. All known thymidylate synthases rely on an active site residue of the enzyme to activate 2'-deoxyuridine-5'-monophosphate(1,2). This functionality has been demonstrated for classical thymidylate synthases, including human thymidylate synthase, and is instrumental in mechanism-based inhibition of these enzymes. Here we report an example of thymidylate biosynthesis that occurs without an enzymatic nucleophile. This unusual biosynthetic pathway occurs in organisms containing the thyX gene, which codes for a flavin-dependent thymidylate synthase (FDTS), and is present in several human pathogens(3-5). Our findings indicate that the putative active site nucleophile is not required for FDTS catalysis, and no alternative nucleophilic residues capable of serving this function can be identified. Instead, our findings suggest that a hydride equivalent (that is, a proton and two electrons) is transferred from the reduced flavin cofactor directly to the uracil ring, followed by an isomerization of the intermediate to form the product, 2'-deoxythymidine-5'-monophosphate. These observations indicate a very different chemical cascade than that of classical thymidylate synthases or any other known biological methylation. The findings and chemical mechanism proposed here, together with available structural data, suggest that selective inhibition of FDTSs, with little effect on human thymine biosynthesis, should be feasible. Because several human pathogens depend on FDTS for DNA biosynthesis, its unique mechanism makes it an attractive target for antibiotic drugs.
C1 [Koehn, Eric M.; Fleischmann, Todd; Kohen, Amnon] Univ Iowa, Dept Chem, Iowa City, IA 52242 USA.
[Conrad, John A.; Palfey, Bruce A.] Univ Michigan, Sch Med, Dept Biol Chem, Ann Arbor, MI 48109 USA.
[Lesley, Scott A.] Novartis Res Fdn, Genom Inst, Joint Ctr Struct Genom, San Diego, CA 92121 USA.
[Mathews, Irimpan I.] Stanford Univ, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
RP Kohen, A (reprint author), Univ Iowa, Dept Chem, Iowa City, IA 52242 USA.
EM amnon-kohen@uiowa.edu
OI Palfey, Bruce/0000-0001-5098-259X
FU NIH [R01 GM065368, R01 GM61087, GM08270]; NSF [CHE 0715448]; JCSG
[U54GM074898]; DOE; OBER; NCRR; NIGMS
FX This work was supported by NIH R01 GM065368 and NSF CHE 0715448 to A.
K., the Iowa Center for Biocatalysis and Bioprocessing to E. M. K., NIH
R01 GM61087 to B. A. P., NIH training grant GM08270 to J.A.C., and JCSG
grant U54GM074898 to S. A. L. Portions of this research were carried out
at the Stanford Synchrotron Radiation Laboratory (SSRL), a national user
facility operated by Stanford University on behalf of DOE, OBER. The
SSRL Structural Molecular Biology Program is supported by DOE, OBER and
by NIH, NCRR, Biomedical Technology Program and NIGMS.
NR 24
TC 45
Z9 46
U1 0
U2 9
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
J9 NATURE
JI Nature
PD APR 16
PY 2009
VL 458
IS 7240
BP 919
EP U13
DI 10.1038/nature07973
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 433CS
UT WOS:000265182500049
PM 19370033
ER
PT J
AU Wang, MR
Kang, QJ
AF Wang, Moran
Kang, Qinjun
TI Electrokinetic Transport in Microchannels with Random Roughness
SO ANALYTICAL CHEMISTRY
LA English
DT Article
ID LATTICE BOLTZMANN METHOD; ELECTROOSMOTIC FLOW; BOUNDARY-CONDITION;
POROUS-MEDIA; MICROFLUIDICS; SIMULATIONS; MODEL; ELECTROPHORESIS;
PRESSURE; DEVICES
AB We present a numerical framework to model the electrokinetic transport in microchannels with random roughness. The three-dimensional microstructure of the rough channel is generated by a random generation-growth method with three statistical parameters to control the number density, the total volume fraction, and the anisotropy characteristics of roughness elements. The governing equations for the electrokinetic transport are solved by a high-efficiency lattice Poisson-Boltzmann method in complex geometries. The effects from the geometric characteristics of roughness on the electrokinetic transport in microchannels are therefore modeled and analyzed. For a given total roughness volume fraction, a higher number density leads to a lower fluctuation because of the random factors. The electroosmotic flow rate increases with the roughness number density nearly logarithmically for a given volume fraction of roughness but decreases with the volume fraction for a given roughness number density. When both the volume fraction and the number density of roughness are given, the electroosmotic flow rate is enhanced by the increase of the characteristic length along the external electric field direction but is reduced by that in the direction across the channel. For a given microstructure of the rough microchannel, the electroosmotic flow rate decreases with the Debye length. It is found that the shape resistance of roughness is responsible for the flow rate reduction in the rough channel compared to the smooth channel even for very thin double layers, and hence plays an important role in microchannel electroosmotic flows.
C1 [Wang, Moran; Kang, Qinjun] Los Alamos Natl Lab, Computat Earth Sci Grp EES 16, Los Alamos, NM 87545 USA.
RP Wang, MR (reprint author), Los Alamos Natl Lab, Computat Earth Sci Grp EES 16, POB 1663, Los Alamos, NM 87545 USA.
EM mwang@lanl.gov; qkang@lanl.gov
RI Wang, Moran/A-1150-2010; Kang, Qinjun/A-2585-2010
OI Kang, Qinjun/0000-0002-4754-2240
FU LANL's LDRD [20080727PRD2]
FX This work is supported by LANL's LDRD Project 20080727PRD2, through the
J. R. Oppenheimer Fellowship awarded to M.W. The authors would like to
thank Prof. T. M. Squires, Dr. J. K. Wang, Prof. J. G. Santiago, and
Prof. D. Q. Li for helpful discussions.
NR 50
TC 47
Z9 49
U1 2
U2 22
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0003-2700
J9 ANAL CHEM
JI Anal. Chem.
PD APR 15
PY 2009
VL 81
IS 8
BP 2953
EP 2961
DI 10.1021/ac802569n
PG 9
WC Chemistry, Analytical
SC Chemistry
GA 432UD
UT WOS:000265158800016
PM 19301844
ER
PT J
AU Cha, SW
Song, ZH
Nikolau, BJ
Yeung, ES
AF Cha, Sangwon
Song, Zhihong
Nikolau, Basil J.
Yeung, Edward S.
TI Direct Profiling and Imaging of Epicuticular Waxes on Arabidopsis
thaliana by Laser Desorption/Ionization Mass Spectrometry Using Silver
Colloid as a Matrix
SO ANALYTICAL CHEMISTRY
LA English
DT Article
ID ECERIFERUM CER MUTANTS; CUTICULAR WAX; INFLORESCENCE STEMS; GENE;
ACCUMULATION; IONIZATION; ALKANES; CLONING
AB Colloidal silver laser desorption/ionization (LDI) mass spectrometry (MS) was employed to directly profile and image epicuticular wax metabolites on a variety of different surfaces of Arabidopsis thaliana leaves and flowers. Major cuticular wax compounds, such as very long-chain fatty acids, alcohols, alkanes, and ketones, were successfully detected as silver adduct ions. The surface metabolites of different flower organs (carpels, petals, and sepals) were profiled for the first time at a spatial resolution of similar to 100 mu m. In addition, mass spectral profiles and images were collected from wild type and a mutant strain, which carried alleles that affect the surface constituents of this organism. One of these mutant alleles (cer2-2) is in a gene whose biochemical functionality is still unclear, although its effect on normal epicuticular wax deposition was the characteristic that led to its original identification. Variations of wax products between different spatial locations for wild type and for a mutant strain were investigated by normalizing the ion intensities to a reference peak ([(107)Ag + (109)Ag](+)). The spatially resolved surface metabolite profiling data of this mutant has provided new insights into the complexity of epicuticular wax deposition at the cellular-resolution scale. This MS-based metabolite imaging technology has the potential to provide valuable data for dissecting metabolism in multicellular organism at the level of single cells.
C1 [Cha, Sangwon; Yeung, Edward S.] US DOE, Ames Lab, Ames, IA 50011 USA.
[Cha, Sangwon; Yeung, Edward S.] Iowa State Univ, Dept Chem, Ames, IA 50011 USA.
[Song, Zhihong; Nikolau, Basil J.] Iowa State Univ, Dept Biochem Biophys & Mol Biol, Ames, IA 50011 USA.
RP Yeung, ES (reprint author), US DOE, Ames Lab, Ames, IA 50011 USA.
EM yeung@ameslab.gov
RI Cha, Sangwon/C-6917-2008
OI Cha, Sangwon/0000-0003-2819-3417
FU U.S. Department of Energy by Iowa State University [DE-AC02-07CH11358];
Director of Science, Office of Basic Energy Sciences, Division of
Chemical Sciences
FX E.S.Y. thanks the Robert Allen Wright Endowment for Excellence for
support. The Ames Laboratory is operated for the U.S. Department of
Energy by Iowa State University under contract no. DE-AC02-07CH11358.
This work was supported by the Director of Science, Office of Basic
Energy Sciences, Division of Chemical Sciences.
NR 26
TC 49
Z9 49
U1 0
U2 21
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0003-2700
J9 ANAL CHEM
JI Anal. Chem.
PD APR 15
PY 2009
VL 81
IS 8
BP 2991
EP 3000
DI 10.1021/ac802615r
PG 10
WC Chemistry, Analytical
SC Chemistry
GA 432UD
UT WOS:000265158800021
PM 19290666
ER
PT J
AU Chang, H
DeFilippis, RA
Tlsty, TD
Parvin, B
AF Chang, Hang
DeFilippis, Rosa Anna
Tlsty, Thea D.
Parvin, Bahram
TI Graphical methods for quantifying macromolecules through bright field
imaging
SO BIOINFORMATICS
LA English
DT Article
ID NONNEGATIVE MATRIX FACTORIZATION
AB Bright field imaging of biological samples stained with antibodies and/or special stains provides a rapid protocol for visualizing various macromolecules. However, this method of sample staining and imaging is rarely employed for direct quantitative analysis due to variations in sample fixations, ambiguities introduced by color composition and the limited dynamic range of imaging instruments. We demonstrate that, through the decomposition of color signals, staining can be scored on a cell-by-cell basis. We have applied our method to fibroblasts grown from histologically normal breast tissue biopsies obtained from two distinct populations. Initially, nuclear regions are segmented through conversion of color images into gray scale, and detection of dark elliptic features. Subsequently, the strength of staining is quantified by a color decomposition model that is optimized by a graph cut algorithm. In rare cases where nuclear signal is significantly altered as a result of sample preparation, nuclear segmentation can be validated and corrected. Finally, segmented stained patterns are associated with each nuclear region following region-based tessellation. Compared to classical non-negative matrix factorization, proposed method: (i) improves color decomposition, (ii) has a better noise immunity, (iii) is more invariant to initial conditions and (iv) has a superior computing performance.
C1 [Chang, Hang; Parvin, Bahram] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Chang, Hang] Chinese Acad Sci, Inst Automat, Beijing, Peoples R China.
[DeFilippis, Rosa Anna; Tlsty, Thea D.] Univ Calif San Francisco, Dept Pathol, San Francisco, CA USA.
[Parvin, Bahram] Univ Calif Riverside, Dept Elect Engn, Riverside, CA 92521 USA.
RP Chang, H (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM hcchang@lbl.gov
FU National Cancer Institute [1P01CA107584-01A1]; US Department of Energy,
Office of Biological and Environmental Research [DE-AC03 SF0098]
FX Funding: National Cancer Institute (1P01CA107584-01A1); US Department of
Energy, Office of Biological and Environmental Research (DE-AC03
SF0098).
NR 14
TC 10
Z9 10
U1 0
U2 5
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 1367-4803
EI 1460-2059
J9 BIOINFORMATICS
JI Bioinformatics
PD APR 15
PY 2009
VL 25
IS 8
BP 1070
EP 1075
DI 10.1093/bioinformatics/btn426
PG 6
WC Biochemical Research Methods; Biotechnology & Applied Microbiology;
Computer Science, Interdisciplinary Applications; Mathematical &
Computational Biology; Statistics & Probability
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
Computer Science; Mathematical & Computational Biology; Mathematics
GA 431WE
UT WOS:000265094400013
PM 18703588
ER
PT J
AU Wang, H
Wang, J
Choi, DW
Tang, ZW
Wu, H
Lin, YH
AF Wang, Hua
Wang, Jun
Choi, Daiwon
Tang, Zhiwen
Wu, Hong
Lin, Yuehe
TI EQCM immunoassay for phosphorylated acetylcholinesterase as a biomarker
for organophosphate exposures based on selective zirconia adsorption and
enzyme-catalytic precipitation
SO BIOSENSORS & BIOELECTRONICS
LA English
DT Article
DE Phosphorylated acetylcholinesterase; Zirconia; Enzyme-catalytic
precipitation; EQCM; Organophosphate exposures
ID QUARTZ-CRYSTAL MICROBALANCE; CHEMICAL WARFARE AGENTS; FARADAIC IMPEDANCE
SPECTROSCOPY; MASS-SPECTROMETRIC ANALYSIS; HUMAN BUTYRYLCHOLINESTERASE;
RETROSPECTIVE DETECTION; CYCLIC VOLTAMMETRY; PESTICIDES; CHROMATOGRAPHY;
NANOPARTICLES
AB A zirconia (ZrO2) adsorption-based immunoassay by electrochemical quartz crystal microbalance (EQCM) has been initially developed, aiming at the detection of phosphorylated acetylcholinesterase (Phospho-AChE) as a potential biomarker for bio-monitoring exposures to organophosphate (OP) pesticides and chemical warfare agents. Hydroxyl-derivatized monolayer was preferably chosen to modify the crystal serving as the template for directing the electro-deposition of ZrO2 film with uniform nanostructures. The resulting ZrO2 film was utilized to selectively capture Phospho-AChE from the sample media. Horseradish peroxidase (HRP)-labeled anti-AChE antibodies were further employed to recognize the captured phosphorylated proteins. Enzyme-catalytic oxidation of the benzidine substrate resulted in the accumulation of insoluble product on the functionalized crystal. Ultrasensitive EQCM quantification by mass-amplified frequency responses as well as rapid qualification by visual color changes of product could be thus, achieved. Moreover, 4-chloro-1-naphthol (CN) was studied as an ideal chromogenic substrate for the enzyme-catalytic precipitation. Experimental results show that the developed EQCM technique can allow for the detection of Phospho-AChE in human plasma with a detection limit of 0.020 nM. Such an EQCM immunosensing format opens a new door towards the development of simple, sensitive, and field-applicable biosensor for biologically monitoring low-level OP exposures. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Wang, Hua; Wang, Jun; Choi, Daiwon; Tang, Zhiwen; Wu, Hong; Lin, Yuehe] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Wang, Hua] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemobiosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.
RP Lin, YH (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM yuehe.lin@pnl.gov
RI Choi, Daiwon/B-6593-2008; Lin, Yuehe/D-9762-2011
OI Lin, Yuehe/0000-0003-3791-7587
FU National Institutes of Health CounterACT Program through the National
Institute of Neurological Disorders and Stroke [NS058161-01]; DOE
[DE-AC05-76RL01830]
FX This work is supported by the National Institutes of Health CounterACT
Program through the National Institute of Neurological Disorders and
Stroke (award # NS058161-01). Its contents are solely the responsibility
of the authors and do not necessarily represent the official views of
the federal government. The research described in this paper was
performed at the Environmental Molecular Sciences Laboratory, a national
scientific user facility sponsored by DOE's Office of Biological and
Environmental Research and located at Pacific Northwest National
Laboratory, which is operated by Battelle for DOE under Contract
DE-AC05-76RL01830.
NR 35
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U1 6
U2 39
PU ELSEVIER ADVANCED TECHNOLOGY
PI OXFORD
PA OXFORD FULFILLMENT CENTRE THE BOULEVARD, LANGFORD LANE, KIDLINGTON,
OXFORD OX5 1GB, OXON, ENGLAND
SN 0956-5663
EI 1873-4235
J9 BIOSENS BIOELECTRON
JI Biosens. Bioelectron.
PD APR 15
PY 2009
VL 24
IS 8
BP 2377
EP 2383
DI 10.1016/j.bios.2008.12.013
PG 7
WC Biophysics; Biotechnology & Applied Microbiology; Chemistry, Analytical;
Electrochemistry; Nanoscience & Nanotechnology
SC Biophysics; Biotechnology & Applied Microbiology; Chemistry;
Electrochemistry; Science & Technology - Other Topics
GA 442AC
UT WOS:000265811000011
PM 19135350
ER
PT J
AU Brunecky, R
Vinzant, TB
Porter, SF
Donohoe, BS
Johnson, DK
Himmel, ME
AF Brunecky, Roman
Vinzant, Todd B.
Porter, Stephanie F.
Donohoe, Bryon S.
Johnson, David K.
Himmel, Michael E.
TI Redistribution of Xylan in Maize Cell Walls During Dilute Acid
Pretreatment
SO BIOTECHNOLOGY AND BIOENGINEERING
LA English
DT Article
DE lignin; hemicellulose; biomass; corn stover; pretreatment; confocal
microscopy
ID ENZYMATIC-HYDROLYSIS; CORN STOVER; LIGNIN; CELLULOSE; WATER
AB Developing processes for the conversion of biomass for use in transportation fuels production is becoming a critically important economic and engineering challenge. Dilute acid pretreatment is it promising technology for increasing the enzymatic digestibility of lignocellulosic biomass. However, a deeper understanding of the pretreatability of biomass is needed so that the rate of formation and yields of sugars call be increased, Xylan is an important hemicellulosic component of the plant cell wall and acts as it barrier to Cellulose, essentially blocking cellulase action. To better understand xylan hydrolysis in corn stover, we have Studied changes in the distribution of xylan caused by dilute acid pretreatment using correlative microscopy. A dramatic loss of xylan antibody signal from the center of the cell wall and all increase or retention of xylan at the plasma membrane interface and middle lamella of the cell were observed by confocal laser scanning microscopy (CLSM). We also observed a reduction in xylan fluorescence signal by CLSM that is generally consistent with the decrease in xylan content measured experimentally in the bulk sample, however, the compartmentalization of this xylan retention was not anticipated.
C1 [Brunecky, Roman; Vinzant, Todd B.; Donohoe, Bryon S.; Johnson, David K.; Himmel, Michael E.] Natl Renewable Energy Lab, Chem Biosci Ctr, Golden, CO 80401 USA.
[Porter, Stephanie F.] SynGeofuels LLC, Golden, CO 80401 USA.
RP Brunecky, R (reprint author), Natl Renewable Energy Lab, Chem Biosci Ctr, 1617 Cole Blvd, Golden, CO 80401 USA.
EM roman_brunecky@nrel.gov
RI Johnson, David/G-4959-2011
OI Johnson, David/0000-0003-4815-8782
FU U.S. Department of Energy Office of the Biomass Program
FX We acknowledge the support of the U.S. Department of Energy Office of
the Biomass Program.
NR 18
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U1 0
U2 20
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0006-3592
J9 BIOTECHNOL BIOENG
JI Biotechnol. Bioeng.
PD APR 15
PY 2009
VL 102
IS 6
BP 1537
EP 1543
DI 10.1002/bit.22211
PG 7
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA 422MX
UT WOS:000264433500002
PM 19161247
ER
PT J
AU Simonson, TS
Okinaka, RT
Wang, B
Easterday, WR
Huynh, L
U'Ren, JM
Dukerich, M
Zanecki, SR
Kenefic, LJ
Beaudry, J
Schupp, JM
Pearson, T
Wagner, DM
Hoffmaster, A
Ravel, J
Keim, P
AF Simonson, Tatum S.
Okinaka, Richard T.
Wang, Bingxiang
Easterday, W. Ryan
Huynh, Lynn
U'Ren, Jana M.
Dukerich, Meghan
Zanecki, Shaylan R.
Kenefic, Leo J.
Beaudry, Jodi
Schupp, James M.
Pearson, Talima
Wagner, David M.
Hoffmaster, Alex
Ravel, Jacques
Keim, Paul
TI Bacillus anthracis in China and its relationship to worldwide lineages
SO BMC MICROBIOLOGY
LA English
DT Article
ID SINGLE-NUCLEOTIDE POLYMORPHISMS; DIVERSITY; GENE; AMES
AB Background: The global pattern of distribution of 1033 B. anthracis isolates has previously been defined by a set of 12 conserved canonical single nucleotide polymorphisms (canSNP). These studies reinforced the presence of three major lineages and 12 sub-lineages and sub-groups of this anthrax-causing pathogen. Isolates that form the A lineage (unlike the B and C lineages) have become widely dispersed throughout the world and form the basis for the geographical disposition of "modern" anthrax. An archival collection of 191 different B. anthracis isolates from China provides a glimpse into the possible role of Chinese trade and commerce in the spread of certain sub-lineages of this pathogen. Canonical single nucleotide polymorphism (canSNP) and multiple locus VNTR analysis (MLVA) typing has been used to examine this archival collection of isolates.
Results: The canSNP study indicates that there are 5 different sub-lineages/sub-groups in China out of 12 previously described world-wide canSNP genotypes. Three of these canSNP genotypes were only found in the western-most province of China, Xinjiang. These genotypes were A. Br.008/009, a sub-group that is spread across most of Europe and Asia; A. Br. Aust 94, a sub-lineage that is present in Europe and India, and A. Br. Vollum, a lineage that is also present in Europe. The remaining two canSNP genotypes are spread across the whole of China and belong to sub-group A. Br. 001/002 and the A. Br. Ames sub-lineage, two closely related genotypes. MLVA typing adds resolution to the isolates in each canSNP genotype and diversity indices for the A. Br. 008/009 and A. Br. 001/002 sub-groups suggest that these represent older and established clades in China.
Conclusion: B. anthracis isolates were recovered from three canSNP sub-groups ( A. Br.008/009, A.Br.Aust94, and A.Br.Vollum) in the western most portion of the large Chinese province of Xinjiang. The city of Kashi in this province appears to have served as a crossroads for not only trade but the movement of diseases such as anthrax along the ancient "silk road". Phylogenetic inference also suggests that the A.Br.Ames sub-lineage, first identified in the original Ames strain isolated from Jim Hogg County, TX, is descended from the A.Br.001/002 sub-group that has a major presence in most of China. These results suggest a genetic discontinuity between the younger Ames sub-lineage in Texas and the large Western North American sub-lineage spread across central Canada and the Dakotas.
C1 [Simonson, Tatum S.; Okinaka, Richard T.; Easterday, W. Ryan; Huynh, Lynn; U'Ren, Jana M.; Dukerich, Meghan; Zanecki, Shaylan R.; Kenefic, Leo J.; Beaudry, Jodi; Schupp, James M.; Pearson, Talima; Wagner, David M.; Keim, Paul] No Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86011 USA.
[Okinaka, Richard T.; Keim, Paul] Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
[Wang, Bingxiang] Lanzhou Inst Biol Prod, Lanzhou, Peoples R China.
[Hoffmaster, Alex] Ctr Dis Control & Prevent, Epidemiol Invest Lab, Atlanta, GA 30333 USA.
[Ravel, Jacques] J Craig Venter Inst, Rockville, MD USA.
[Keim, Paul] Translat Genom Res Inst, Pathogen Genom Div, Phoenix, AZ 85004 USA.
RP Keim, P (reprint author), No Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86011 USA.
EM Tatum.Simonson@utah.edu; Richard.Okinaka@NAU.edu; Wangbxa@126.com;
ryaneasterday@hotmail.com; lyhuynh@emory.edu; juren@email.arizona.edu;
msdukerich@ucdavis.edu; shayz@cableone.net; Leo.Kenefic@nau.edu;
Jodi.Beaudry@nau.edu; James.Schupp@nau.edu; Talima.Pearson@nau.edu;
David.Wagner@nau.edu; amh9@cdc.gov; jravel@som.umaryland.edu;
Paul.Keim@nau.edu
RI Wagner, David/A-5125-2010; Keim, Paul/A-2269-2010; Easterday, W.
Ryan/M-6732-2015;
OI Easterday, W. Ryan/0000-0001-5865-7062; Ravel,
Jacques/0000-0002-0851-2233
FU Department of Homeland Security Science and Technology Directorate
[NBCH2070001, HSHQDC-08-C00158]
FX We wish to acknowledge the contributions of Matthew N. Van Ert for
providing conceptual and analytical insights for this project. This work
was funded in part by the Department of Homeland Security Science and
Technology Directorate under contract numbers: NBCH2070001 and
HSHQDC-08-C00158.
NR 22
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U1 0
U2 8
PU BIOMED CENTRAL LTD
PI LONDON
PA CURRENT SCIENCE GROUP, MIDDLESEX HOUSE, 34-42 CLEVELAND ST, LONDON W1T
4LB, ENGLAND
SN 1471-2180
J9 BMC MICROBIOL
JI BMC Microbiol.
PD APR 15
PY 2009
VL 9
AR 71
DI 10.1186/1471-2180-9-71
PG 11
WC Microbiology
SC Microbiology
GA 442NS
UT WOS:000265848500001
PM 19368722
ER
PT J
AU Yang, J
Stewart, M
Maupin, G
Herling, D
Zelenyuk, A
AF Yang, Juan
Stewart, Mark
Maupin, Gary
Herling, Darrell
Zelenyuk, Alla
TI Single wall diesel particulate filter (DPF) filtration efficiency
studies using laboratory generated particles
SO CHEMICAL ENGINEERING SCIENCE
LA English
DT Article
DE Diesel particulate filter; Filtration; Porous media; Simulation;
Particulate processes; Aerosol
AB Diesel engines offer higher fuel efficiency, but produce more exhaust particulate than conventional gasoline engines. Diesel particulate filters are presently the most efficient means to reduce these emissions. These filters typically trap particles in two basic modes: at the beginning of the exposure cycle the particles are captured in the filter holes, and at longer times the particles form a "cake" on which particles are trapped. Eventually the "cake" is removed by oxidation and the cycle is repeated. We have investigated the properties and behavior of two commonly used filters: silicon carbide (SiC) and cordierite (DuraTrap (R) RC) by exposing them to nearly-spherical ammonium sulfate particles. We show that the transition from deep bed filtration to "cake" filtration can easily be identified by recording the change in pressure across the filters as a function of exposure. We investigated the performance of these filters as a function of flow rate and particle size and found that the filters have the highest filtration efficiencies for particles smaller than similar to 80 nm and larger than similar to 200 nm. A comparison between the experimental data and a simulation using incompressible lattice-Boltzmann model shows good qualitative agreement, but the model over-predicts the filter's trapping efficiency. (C) 2009 Published by Elsevier Ltd.
C1 [Yang, Juan; Stewart, Mark; Maupin, Gary; Herling, Darrell; Zelenyuk, Alla] Pacific NW Natl Lab, Richland, WA 99354 USA.
RP Zelenyuk, A (reprint author), Pacific NW Natl Lab, Richland, WA 99354 USA.
EM alla.zelenyuk@pnl.gov
RI Yang, Juan/F-5220-2010
OI Yang, Juan/0000-0001-5502-9351
FU DOE Office of Energy Efficiency and Renewable Energy; US Department of
Energy [DE-AC06-76RL0 1830]
FX This research was performed in part using the Molecular Science
Computing Facility (MSCF) and other facilities in the Environmental
Molecular Sciences Laboratory, a national scientific user facility
sponsored by the Department of Energy's Office of Biological and
Environmental Research at Pacific Northwest National Laboratory (PNNL).
PNNL is operated by the US Department of Energy by Battelle Memorial
Institute under Contract no. DE-AC06-76RL0 1830.
NR 14
TC 37
Z9 39
U1 6
U2 28
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0009-2509
J9 CHEM ENG SCI
JI Chem. Eng. Sci.
PD APR 15
PY 2009
VL 64
IS 8
BP 1625
EP 1634
DI 10.1016/j.ces.2008.12.011
PG 10
WC Engineering, Chemical
SC Engineering
GA 435AX
UT WOS:000265316700001
ER
PT J
AU Wright, HMN
Cashman, KV
Gottesfeld, EH
Roberts, JJ
AF Wright, Heather M. N.
Cashman, Katharine V.
Gottesfeld, Emily H.
Roberts, Jeffery J.
TI Pore structure of volcanic clasts: Measurements of permeability and
electrical conductivity
SO EARTH AND PLANETARY SCIENCE LETTERS
LA English
DT Article
DE porosity; permeability; electrical conductivity; degassing; tortuosity
ID POROUS-MEDIA; TRANSPORT-PROPERTIES; NETWORK MODEL; ROCKS; FLOW;
FRAGMENTATION; MAGMAS; TRANSITION; ERUPTIONS; PRESSURE
AB The pore structure of volcanic clasts is examined using measurements of porosity, permeability, and electrical properties. Permeability varies by several orders of magnitude among volcanic clasts and does not depend solely upon porosity. Electrical property measurements of saturated volcanic samples illustrate the influence of pathway tortuosity and pore shape on permeability. For equivalent eruption conditions, silicic samples show higher tortuosities, smaller vesicle sizes, and lower permeabilities than mafic samples. These differences are largely due to variations in vesiculation and crystallization history. Differences between explosive and effusive samples reflect the relative ability of bubbles to form and maintain connected pathways during bubble expansion and collapse. Isotropic samples (variably expanded breadcrust bombs and most pumice fall samples) have pore pathways that simplify with increasing porosity. Highly vesicular anisotropic samples (e.g., tube pumice) have high permeabilities and low tortuosities parallel to pore elongation and low permeabilities and high tortuosities perpendicular to elongation. These pathways simplify with increasing deformation (i.e. tortuosity decreases as porosity decreases), until pore geometries collapse sufficiently to form intersecting cracks. More generally, Archie's Law (power law) relationships between electrical conductivity formation factor (F) and porosity (phi) have an Archie's exponent, m, between 1 and 4 (where F = phi(-m)) for low porosity volcanic clasts. However, samples with higher connected porosities (>20% for silicic samples and >50% for mafic samples) have in values that increase with increasing porosity, reaching up to 15. We also find that a single Archie's Law fit to a suite of samples is not appropriate either for sample suites with widely varying porosities or for anisotropic samples with a directional variation in measured properties. These measurements caution against simple application of cross-property relationships derived from sedimentary rocks to models of permeability in volcanic samples. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Wright, Heather M. N.] Monash Univ, Sch Geosci, Clayton, Vic 3800, Australia.
[Wright, Heather M. N.; Cashman, Katharine V.; Gottesfeld, Emily H.] 1272 Univ Oregon, Dept Geol Sci, Eugene, OR 97403 USA.
[Roberts, Jeffery J.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Wright, HMN (reprint author), Monash Univ, Sch Geosci, Clayton, Vic 3800, Australia.
EM Heather.Wright@sci.monash.edu.au
RI Wright, Heather/K-4500-2012
OI Wright, Heather/0000-0001-9013-507X
FU NSF [EAR206201]; U.S. Department of Energy by Lawrence Livermore
National Laboratory [DE-AC52-07NA27344]
FX We thank J.L. Pennec and one anonymous reviewer for their comments. This
work was supported by NSF grant EAR206201 to KVC and performed under the
auspices of the U.S. Department of Energy by Lawrence Livermore National
Laboratory under Contract DE-AC52-07NA27344, specifically through the
Office of Basic Energy Sciences to JJR.
NR 62
TC 60
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U1 0
U2 18
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0012-821X
J9 EARTH PLANET SC LETT
JI Earth Planet. Sci. Lett.
PD APR 15
PY 2009
VL 280
IS 1-4
BP 93
EP 104
DI 10.1016/j.epsl.2009.01.023
PG 12
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 438ZE
UT WOS:000265594800007
ER
PT J
AU Amidon, WH
Rood, DH
Farley, KA
AF Amidon, William H.
Rood, Dylan H.
Farley, Kenneth A.
TI Cosmogenic He-3 and Ne-21 production rates calibrated against Be-10 in
minerals from the Coso volcanic field
SO EARTH AND PLANETARY SCIENCE LETTERS
LA English
DT Article
DE helium; neon; Be-10; lithium; Li
ID SURFACE EXPOSURE AGES; HOLOCENE LAVA FLOWS; TERRESTRIAL ROCKS; (U-TH)/HE
AGES; DRY VALLEYS; CALIFORNIA; HELIUM; QUARTZ; RHYOLITE; USA
AB This study calibrates the production rate of cosmogenic He-3 in pyroxene, olivine, garnet, zircon and apatite as well as Ne-21 in quartz and pyroxene against the known production rate of Be-10 in quartz. The Devil's Kitchen rhyolite from the Coso volcanic field in southeastern California (elev. similar to 1300 m) was chosen for this study due to its young age (similar to 610 ka) and diverse mineral assemblage. Based on Be-10, our two rhyolite samples have apparent exposure ages of similar to 49 and 93 ka, indicating substantial erosion after eruption. Combining data from the two samples, we estimate sea level high latitude He-3 spallation production rates of 145 +/- 11, 141 +/- 16. and 144 +/- 30 at g(-1) a(-1) (2 sigma) for pyroxene, olivine and spessartine garnet respectively. For zircon and apatite, we estimate apparent He-3 spallation production rates of 114 +/- 8 and 149 +/- 28 at g(-1) a(-1) (2 sigma) respectively. The rates for zircon and apatite are reported as apparent production rates because we do not explicitly address the redistribution of spallation produced He-3 from adjacent minerals. These estimates quantitatively account for production of He-3 from both cosmogenic and radiogenic neutron reactions on Li-6 within the analyzed phases and also implanted from nuclear reactions in neighboring minerals: the high U, Th and Li content of this rhyolite provides a particularly rigorous test of this correction. We estimate Ne-21 production rates of 17.7 +/- 1.6 and 34.1 +/- 3.2 at g(-1) a(-1) (2 sigma) in quartz and pyroxene (Fe/Mg = 0.7 by mass) respectively. Although high U and Th contents create the potential for significant production of nucleogenic Ne-21, this component is small due to the young eruption age of the rhyolite. (C) 2009 Elsevier B.V. All Fights reserved.
C1 [Amidon, William H.; Farley, Kenneth A.] CALTECH, GPS Div, Pasadena, CA 91125 USA.
[Rood, Dylan H.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Amidon, WH (reprint author), CALTECH, GPS Div, MS 100-23, Pasadena, CA 91125 USA.
EM wamidon@gps.caltech.edu
FU National Science Foundation [0511053]
FX Thanks to Don Burnett, P.H. Blard, and Frank Monastero. Thanks to Samuel
Niedermann and an anonymous reviewer for greatly improving this
manuscript. This work was supported by National Science Foundation Grant
0511053.
NR 55
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U1 0
U2 12
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0012-821X
EI 1385-013X
J9 EARTH PLANET SC LETT
JI Earth Planet. Sci. Lett.
PD APR 15
PY 2009
VL 280
IS 1-4
BP 194
EP 204
DI 10.1016/j.epsl.2009.01.031
PG 11
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 438ZE
UT WOS:000265594800017
ER
PT J
AU Shao, YY
Wang, J
Kou, R
Engelhard, M
Liu, J
Wang, Y
Lin, YH
AF Shao, Yuyan
Wang, Jun
Kou, Rong
Engelhard, Mark
Liu, Jun
Wang, Yong
Lin, Yuehe
TI The corrosion of PEM fuel cell catalyst supports and its implications
for developing durable catalysts
SO ELECTROCHIMICA ACTA
LA English
DT Article
DE PEM fuel cell; Catalyst support; Degradation/corrosion; Potential-step;
Accelerated durability test
ID ORIENTED PYROLYTIC-GRAPHITE; OXIDIZED CARBON-FIBERS;
SULFURIC-ACID-SOLUTION; OXYGEN REDUCTION; ELECTROCHEMICAL OXIDATION;
DEGRADATION; MEMBRANE; DURABILITY; ELECTROCATALYSTS; ELECTRODES
AB Studying the corrosion behavior of catalyst support materials is significant for understanding the degradation of polymer electrolyte membrane (PEM) fuel cell performance and developing durable electrocatalysts. The oxidation of Vulcan carbon black (the most widely used catalyst support for PEM fuel cells) was investigated using various electrochemical stressing methods (fixed-potential holding vs. potential-step cycling). among which the potential-step cycling was considered to mimic more closely the real drive-cycle operation of vehicle PEM fuel cells. The oxidation of carbon was accelerated under potential-step conditions as compared with the fixed-potential holding condition. Increasing the potential-step frequency or decreasing the lower potential limit in the potential-step can further accelerate the corrosion of carbon. The accelerated corrosion of carbon black was tentatively attributed to the cycle of consumption/regeneration of some easily oxidized species. These findings are being employed to develop a test protocol for fast-screening durable catalyst support. (C) 2009 Published by Elsevier Ltd.
C1 [Shao, Yuyan; Wang, Jun; Kou, Rong; Engelhard, Mark; Liu, Jun; Wang, Yong; Lin, Yuehe] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Lin, YH (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM yuehe.lin@pnl.gov
RI Engelhard, Mark/F-1317-2010; Shao, Yuyan/A-9911-2008; Lin,
Yuehe/D-9762-2011; Wang, Yong/C-2344-2013;
OI Shao, Yuyan/0000-0001-5735-2670; Lin, Yuehe/0000-0003-3791-7587;
Engelhard, Mark/0000-0002-5543-0812
FU U.S. Department of Energy; Pacific Northwest National Laboratory (PNNL)
[DE-AC05-76LO1830]
FX This work is supported by the U.S. Department of Energy's (DOE's) Energy
Efficiency and Renewable Energy Hydrogen Program. The research described
in this paper was performed at the Environmental Molecular Science
Laboratory, a national scientific user facility sponsored by DOE's
Office of Biological and Environmental Research and located at Pacific
Northwest National Laboratory (PNNL). PNNL is operated by Battelle for
DOE under Contract DE-AC05-76LO1830.
NR 54
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U1 3
U2 30
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0013-4686
J9 ELECTROCHIM ACTA
JI Electrochim. Acta
PD APR 15
PY 2009
VL 54
IS 11
BP 3109
EP 3114
DI 10.1016/j.electacta.2008.12.001
PG 6
WC Electrochemistry
SC Electrochemistry
GA 435KF
UT WOS:000265342100025
ER
PT J
AU Streets, DG
Zhang, Q
Wu, Y
AF Streets, David G.
Zhang, Qiang
Wu, Ye
TI Projections of Global Mercury Emissions in 2050
SO ENVIRONMENTAL SCIENCE & TECHNOLOGY
LA English
DT Article
ID ANTHROPOGENIC SOURCES; ATMOSPHERIC MERCURY; MEDITERRANEAN REGION;
BIOMASS; INVENTORY; FIRES; CHINA
AB Global Hg emissions are presented for the year 2050 under a variety of assumptions about socioeconomic and technology development. We find it likely that Hg emissions will increase in the future. The range of 2050 global Hg emissions is projected to be 2390-4860 Mg, compared to 2006 levels of 2480 Mg, reflecting a change of -4% to +96%. The main driving force for increased emissions is the expansion of coal-fired electricity generation in the developing world, particularly Asia. Our ability to arrest the growth in Hg emissions is limited by the relatively low Hg removal efficiency of the current generation of emission control technologies for coal-fired power plants (flue-gas desulfurization). Large-scale deployment of advanced Hg sorbent technologies, such as Activated Carbon Injection, offers the promise of lowering the 2050 emissions range to 1670-3480 Mg, but these technologies are not yet in commercial use. The share of elemental Hg in total emissions will decline from today's levels of similar to 65% to similar to 50-55% by 2050, while the share of divalent Hg will increase. This signals a shift from long-range transport of elemental Hg to local deposition of Hg compounds-though emissions of both species could increase under the worst case.
C1 [Streets, David G.; Zhang, Qiang] Argonne Natl Lab, Decis & Informat Sci Div, Argonne, IL 60439 USA.
[Wu, Ye] Tsinghua Univ, Dept Environm Sci & Engn, Beijing 100084, Peoples R China.
RP Streets, DG (reprint author), Argonne Natl Lab, Decis & Informat Sci Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM dstreets@anl.gov
RI Zhang, Qiang/D-9034-2012; Wu, Ye/O-9779-2015;
OI Streets, David/0000-0002-0223-1350
FU U.S. Environmental Protection Agency's STAR Program
FX This work was funded by the U.S. Environmental Protection Agency's STAR
Program on the Consequences of Global Change for Air Quality, as part of
collaboration with Harvard
NR 33
TC 183
Z9 187
U1 11
U2 91
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0013-936X
EI 1520-5851
J9 ENVIRON SCI TECHNOL
JI Environ. Sci. Technol.
PD APR 15
PY 2009
VL 43
IS 8
BP 2983
EP 2988
DI 10.1021/es802474j
PG 6
WC Engineering, Environmental; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA 432ZK
UT WOS:000265172800053
PM 19475981
ER
PT J
AU Hoffman, EM
Curran, AM
Dulgerian, N
Stockham, RA
Eckenrode, BA
AF Hoffman, Erin M.
Curran, Allison M.
Dulgerian, Nishan
Stockham, Rex A.
Eckenrode, Brian A.
TI Characterization of the volatile organic compounds present in the
headspace of decomposing human remains
SO FORENSIC SCIENCE INTERNATIONAL
LA English
DT Article
DE Human remains; Canines; Volatile organic compounds; Clandestine burials;
Solid-phase microextraction; SPME
ID ADIPOCERE FORMATION; CADAVER DOGS; HUMAN-BODY; ENVIRONMENT; BURIAL; SOIL
AB Law enforcement agencies frequently use canines trained to detect the odor of human decomposition to aid in determining the location of clandestine burials and human remains deposited or scattered on the surface. However, few studies attempt to identify the specific volatile organic compounds (VOCs) that elicit an appropriate response from victim recovery (VR) canines. Solid-phase microextraction (SPME) was combined with gas chromatography-mass spectrometry (GC-MS) to identify the VOCs released into the headspace associated with 14 separate tissue samples of human remains previously used for VR canine training. The headspace was found to contain various classes of VOCs, including acids, alcohols, aldehydes, halogens, aromatic hydrocarbons, ketones, and sulfides. Analysis of the data indicates that the VOCs associated with human decomposition share similarities across regions of the body and across types of tissue. However, sufficient differences exist to warrant VR canine testing to identify potential mimic odor chemical profiles that can be used as training aids. The resulting data will assist in the identification of the most suitable mixture and relative concentrations of VOCs to appropriately train VR canines. Published by Elsevier Ireland Ltd.
C1 [Eckenrode, Brian A.] FBI Lab, Counterterrorism & Forens Sci Res Unit, Quantico, VA 22135 USA.
[Hoffman, Erin M.; Curran, Allison M.] Oak Ridge Inst Sci & Educ, Oak Ridge, TN USA.
[Dulgerian, Nishan; Stockham, Rex A.] FBI Lab, Evidence Response Team Unit, Quantico, VA 22135 USA.
RP Eckenrode, BA (reprint author), FBI Lab, Counterterrorism & Forens Sci Res Unit, Bldg 12 Room 302, Quantico, VA 22135 USA.
EM brian.eckenrode@ic.fbi.gov
NR 23
TC 60
Z9 60
U1 6
U2 48
PU ELSEVIER IRELAND LTD
PI CLARE
PA ELSEVIER HOUSE, BROOKVALE PLAZA, EAST PARK SHANNON, CO, CLARE, 00000,
IRELAND
SN 0379-0738
J9 FORENSIC SCI INT
JI Forensic Sci.Int.
PD APR 15
PY 2009
VL 186
IS 1-3
BP 6
EP 13
DI 10.1016/j.forsciint.2008.12.022
PG 8
WC Medicine, Legal
SC Legal Medicine
GA 435VH
UT WOS:000265370900002
PM 19203852
ER
PT J
AU Catalano, JG
Fenter, P
Park, C
AF Catalano, Jeffrey G.
Fenter, Paul
Park, Changyong
TI Water ordering and surface relaxations at the hematite (110)-water
interface
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID X-RAY REFLECTIVITY; AQUEOUS-SOLUTION; OXYGEN-EXCHANGE; ORTHOCLASE
(001)-WATER; PHOSPHATE REMOVAL; MINERAL SURFACES; ADSORPTION;
SCATTERING; MOLECULE; RATES
AB Structural characterization of iron oxide-water interfaces provides insight into the mechanisms through which these minerals control contaminant fate and element cycling in soil, sedimentary, and groundwater systems. Ordering of interfacial water and structural relaxations at the hematite (110) surface have been investigated in situ using high-resolution specular X-ray reffectivity. These measurements demonstrate that relaxations are constrained to primarily the top similar to 5 angstrom of the surface. Near-surface iron atoms do not relax substantially, although the uppermost layer displays an increased distribution width, while the undercoordinated oxygens on the surface uniformly relaxed outward. Two sites of adsorbed water and additional layering of water farther from the surface were observed. Water fully covers the (110) surface and appears to form a continuous network extending into bulk solution, with positional order decreasing to that of a disordered bulk fluid within 1 nm. The arrangement of water is similar to that on the hematite (012) surface, which has a similar surface topography, although these surfaces display different vibrational amplitudes or positional disorder of adsorbed water molecules and average spacings of near-surface layered water. Comparison between these surfaces suggests that interfacial water ordering on hematite is controlled primarily by surface structure and steric constraints and that highly ordered water is likely common to most hematite-water interfaces. (c) 2009 Elsevier Ltd. All rights reserved.
C1 [Catalano, Jeffrey G.] Washington Univ, Dept Earth & Planetary Sci, St Louis, MO 63130 USA.
[Catalano, Jeffrey G.] Washington Univ, McDonnell Ctr Space Sci, St Louis, MO 63130 USA.
[Fenter, Paul; Park, Changyong] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Catalano, JG (reprint author), Washington Univ, Dept Earth & Planetary Sci, St Louis, MO 63130 USA.
EM catalano@wustl.edu
RI Catalano, Jeffrey/A-8322-2013; Park, Changyong/A-8544-2008
OI Catalano, Jeffrey/0000-0001-9311-977X; Park,
Changyong/0000-0002-3363-5788
NR 55
TC 32
Z9 32
U1 3
U2 30
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0016-7037
J9 GEOCHIM COSMOCHIM AC
JI Geochim. Cosmochim. Acta
PD APR 15
PY 2009
VL 73
IS 8
BP 2242
EP 2251
DI 10.1016/j.gca.2009.02.001
PG 10
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 427PI
UT WOS:000264790800003
ER
PT J
AU Fredrickson, JK
Zachara, JM
Plymale, AE
Heald, SM
McKinley, JP
Kennedy, DW
Liu, CX
Nachimuthu, P
AF Fredrickson, James K.
Zachara, John M.
Plymale, Andrew E.
Heald, Steve M.
McKinley, James P.
Kennedy, David W.
Liu, Chongxuan
Nachimuthu, Ponnusamy
TI Oxidative dissolution potential of biogenic and abiogenic TcO2 in
subsurface sediments
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID DISSIMILATORY REDUCTION; SHEWANELLA-PUTREFACIENS; TECHNETIUM REDUCTION;
IRON REDUCTION; ELECTRON-DONOR; SOLID-SOLUTION; OXIDES; FE(II);
PERTECHNETATE; PRODUCTS
AB Technetium-99 (Tc) is an important fission product contaminant associated with sites of nuclear fuels reprocessing and geologic nuclear waste disposal. Tc is highly mobile in its most oxidized state [Tc(VII)O-4(-)] and less mobile in the reduced form [Tc(IV)O-2 center dot nH(2)O]. Here we investigate the potential for oxidation of Tc(IV) that was heterogeneously reduced by reaction with biogenic Fe(II) in two sediments differing in mineralogy and aggregation state; unconsolidated Pliocene-age fluvial sediment from the upper Ringold (RG) Formation at the Hanford Site and a clay-rich saprolite from the Field Research Center (FRC) background site on the Oak Ridge Site. Both sediments contained Fe(III) and Mn(III/IV) as redox active phases, but FRC also contained mass-dominant Fe-phyllosilicates of different types. Shewanella putrefaciens CN32 reduced Mn(III/IV) oxides and generated Fe(II) that was reactive with Tc(VII) in heat-killed, bioreduced sediment. After bioreduction and heat-killing, biogenic Fe(II) in the FRC exceeded that in RG by a factor of two. More rapid reduction rates were observed in the RG that had lower biogenic Fe(II), and less particle aggregation. EXAFS measurements indicated that the primary reduction product was a TcO2-like phase in both sediments. The biogenic redox product Tc(TV) oxidized rapidly and completely in RG when contacted with air. Oxidation, in contrast, was slow and incomplete in the FRC, in spite of similar molecular scale speciation of Tc compared to RG. X-ray microprobe, electron microprobe, X-ray absorption spectroscopy, and micro X-ray diffraction were applied to the whole sediment and isolated Tc-containing particles. These analyses revealed that non-oxidizable Tc(IV) in the FRC existed as complexes with octahedral Fe(III) within intra-grain domains of 50-100 mu m-sized, Fe-containing micas presumptively identified as celadonite. The markedly slower oxidation rates in FRC as compared to RG were attributed to mass-transfer-limited migration of 0, into intra-aggregate and intraparticle domains where Tc(IV) existed; and the formation of unique, oxidation-resistant, intragrain Tc(IV)-Fe(III) molecular species. (c) 2009 Elsevier Ltd. All rights reserved.
C1 [Fredrickson, James K.; Zachara, John M.; Plymale, Andrew E.; McKinley, James P.; Kennedy, David W.; Liu, Chongxuan; Nachimuthu, Ponnusamy] Pacific NW Natl Lab, POB 999,MSIN P7-50, Richland, WA 99352 USA.
[Heald, Steve M.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Fredrickson, JK (reprint author), Pacific NW Natl Lab, POB 999,MSIN P7-50, Richland, WA 99352 USA.
EM jim.fredrickson@pnl.gov
RI Liu, Chongxuan/C-5580-2009;
OI Kennedy, David/0000-0003-0763-501X
FU Environmental Remediation Science Program (ERSP); Office of Biological
and Environmental Research (OBER); US Department of Energy (DOE)
[DE-AC02-06CH 11357]
FX We wish to thank Tom Resch for preparation of samples for XAS analysis.
This research was supported by the Environmental Remediation Science
Program (ERSP), Office of Biological and Environmental Research (OBER),
US Department of Energy (DOE). PNC/XOR facilities at the Advanced Photon
Source, and research at these facilities, are supported by the US
Department of Energy - Basic Energy Sciences, a major facilities access
grant from NSERC, the University of Washington, Simon Fraser University
and the Advanced Photon Source. Use of the Advanced Photon Source is
also supported by the US Department ofEnergy, Office of Science, Office
of Basic Energy Sciences, under Contract DE-AC02-06CH 11357. Mbssbauer
analyses and micro X-ray diffraction were performed using EMSL, a
national scientific user facility sponsored by the Department of
Energy's Office of Biological and Environmental Research located at
Pacific Northwest National Laboratory. We thank Dr. Ravi Kukkadapu for
performing the M6ssbauer analysis and modeling. PNNL is operated for the
Department of Energy by Battelle.
NR 50
TC 33
Z9 33
U1 4
U2 30
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0016-7037
EI 1872-9533
J9 GEOCHIM COSMOCHIM AC
JI Geochim. Cosmochim. Acta
PD APR 15
PY 2009
VL 73
IS 8
BP 2299
EP 2313
DI 10.1016/j.gca.2009.01.027
PG 15
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 427PI
UT WOS:000264790800006
ER
PT J
AU Beighley, RE
Eggert, KG
Dunne, T
He, Y
Gummadi, V
Verdin, KL
AF Beighley, R. E.
Eggert, K. G.
Dunne, T.
He, Y.
Gummadi, V.
Verdin, K. L.
TI Simulating hydrologic and hydraulic processes throughout the Amazon
River Basin
SO HYDROLOGICAL PROCESSES
LA English
DT Article
DE Amazon Basin; flood routing; hydrologic modelling
ID WATER STORAGE; INUNDATION; PARAMETERS; VEGETATION; SYSTEM; FOREST;
SOILS; SCALE; AREA
AB Presented here is a model framework based on a land surface topography that can be represented with various degrees of resolution and capable of providing representative channel/floodplain hydraulic characteristics on a daily to hourly scale. The framework integrates two models: (1) a water balance model (WBM) for the vertical fluxes and stores of water in and through the canopy and soil layers based oil the conservation of mass and energy, and (2) a routing model for the horizontal routing of surface and subsurface runoff and channel and floodplain waters based oil kinematic and diffusion wave methodologies. The WBM is driven by satellite-derived precipitation (TRMM_3B42) and air temperature (MOD08_M3). The model's use of an irregular computational grid is intended to facilitate parallel processing for applications to continental and global scales. Results are presented for the Amazon Basin over the period Jan 2001 through Dec 2005. The model is shown to capture annual runoff totals, annual peaks, seasonal patterns, and daily fluctuations over a range of spatial scales (>1,000 to <4.7M km(2)). For the period Of Study, results suggest basin-wide total water storage changes in the Amazon vary by approximately +/-5 to 10 cm, and the fractional components accounting for these changes are: root zone soil moisture (20%), Subsurface water being routed laterally to channels (40%) and channel/floodplain discharge (40%). Annual variability in monthly water storage changes by +/-2.5 cm is likely due to 0.5 to 1 month variability in the arrival of significant rainfall periods throughout the basin. Copyright (C) 2009 John Wiley & Sons, Ltd.
C1 [Beighley, R. E.; He, Y.; Gummadi, V.] San Diego State Univ, San Diego, CA 92182 USA.
[Eggert, K. G.] Univ Calif Santa Barbara, Inst Computat Earth Syst Sci, Santa Barbara, CA 93106 USA.
[Eggert, K. G.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM USA.
[Dunne, T.] Univ Calif Santa Barbara, Donald Bren Sch Environm Sci & Management, Santa Barbara, CA 93106 USA.
[Verdin, K. L.] US Geol Survey, Earth Resources Observat & Sci Ctr, Sioux Falls, SD USA.
RP Beighley, RE (reprint author), San Diego State Univ, 5500 Campanile Dr, San Diego, CA 92182 USA.
EM beighley@mail.sdsu.edu
RI Dunne, Thomas/B-6374-2014
OI Dunne, Thomas/0000-0002-5281-6517
FU NASA [NNX06AF13G, NAG5-6120, SH-02, NASA/NAG58396]; US Dept. of Energy
[DE-AC52-06NA25396]
FX In part, this work was carried Out under the auspices These data
products were used in the basin model of the NASA New Investigator
Program, Contract No. calibration. NNX06AF13G; NASA Earth Observing
System project NAG5-6120, NASA LBA project SH-02: NASA/NAG58396; US
Geological Survey Contract No. 05CRAGO029; and the National Nuclear
Security Administration of the US Dept. of Energy at Los Alamos National
Laboratory under Contract No. DE-AC52-06NA25396; Los Alamos National
Laboratory Directed Research and Development project, 'High-Resolution
Physically-Based Model of Semi-Arid River Basin Hydrology', and US Dept.
of Energy's Climate Change Prediction Program in the Office of Science.
The authors thank Dr Rosangela Sviercoski for her analysis and extension
of the discharge data at select stations in the Amazon basin.
NR 58
TC 67
Z9 69
U1 3
U2 26
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0885-6087
EI 1099-1085
J9 HYDROL PROCESS
JI Hydrol. Process.
PD APR 15
PY 2009
VL 23
IS 8
BP 1221
EP 1235
DI 10.1002/hyp.7252
PG 15
WC Water Resources
SC Water Resources
GA 434DA
UT WOS:000265254200011
ER
PT J
AU Leek, R
Wu, JQ
Wang, L
Hanrahan, TP
Barbet, ME
Qiu, HX
AF Leek, Randal
Wu, Joan Q.
Wang, Li
Hanrahan, Timothy P.
Barbet, Michael E.
Qiu, Hanxue
TI Heterogeneous characteristics of streambed saturated hydraulic
conductivity of the Touchet River, south eastern Washington, USA
SO HYDROLOGICAL PROCESSES
LA English
DT Article
DE streambed heterogeneity; saturated hydraulic conductivity; slug test;
hyporheic zone
ID HYPORHEIC EXCHANGE; SLUG TESTS; SPAWNING HABITAT; ZONE; FLOW; SURVIVAL;
QUALITY; BOUWER; WATER; GROUNDWATER
AB Traditionally a streambed is treated as a layer of uniform thickness and low saturated hydraulic conductivity (K) in surface- and ground-water studies. Recent findings have shown a high level of spatial heterogeneity within a streambed and such heterogeneity directly affects surface- and ground-water exchange and can have ecological implications for biogeochemical transformations, nutrient cycling, organic matter decomposition, and reproduction of gravel spawning fish. In this study a detailed field investigation of K was conducted in two selected sites in Touchet River, a typical salmon spawning stream in and south eastern Washington, USA. In-stream Slug tests were conducted to determine K following the Bouwer and Rice method. For the upper and lower sites, each 50 m long and 9 m wide and roughly 20 m apart, a sampling grid of 5 m longitudinally and 3 m transversely was used. The Slug tests were performed for each horizontal coordinate at 0.3-0-45, 0-6-0-75, 0.9-1-05 and 1.2-1.35 in depth intervals unless a shallower impenetrable obstruction was encountered. Additionally, water levels were measured to obtain vertical hydraulic gradient (VHG) between each two adjacent depth intervals. Results indicated that K ranged over three orders of magnitude at both the upper and lower sites and differed between the two sites. At the upper site, K did not differ significantly among different depth intervals based on nonparametric statistical tests for mean, median. and empirical Cumulative distribution, but the spatial pattern of K varied among different depth intervals. At the lower site, K for the 0-3-0-45 m depth interval differed statistically from those at other depth intervals, and no similar spatial pattern was found among different depth intervals. Zones of upward and downward water flow based on VHG also varied among different depth intervals, reflecting the complexities of the water flow regime. Detailed characterization of the streambed as attempted in this study should be helpful in providing information on spatial variations of streambed hydraulic properties as well as surface- and,round-water interaction. Copyright (C) 2009 John Wiley & Sons, Ltd.
C1 [Leek, Randal; Wu, Joan Q.; Wang, Li; Qiu, Hanxue] Washington State Univ, Dept Biol Syst Engn, Pullman, WA 99164 USA.
[Hanrahan, Timothy P.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Barbet, Michael E.] Washington State Univ, Dept Civil & Environm Engn, State Washington Water Res Ctr, Pullman, WA 99164 USA.
RP Wang, L (reprint author), Washington State Univ, Dept Biol Syst Engn, Pullman, WA 99164 USA.
EM liwang@wsu.edu
FU SWWRC (State of Washington Water Research Center) [01HQGR0107]
FX This research was in part supported through a SWWRC (State of Washington
Water Research Center) grant by the U.S. Geological Survey (Grant No.
01HQGR0107). We thank Cory Greer, Prabhakar Singh, Xiangyang Fu and
Travis Parry for their valuable help during the field work, Steve Martin
for his assistance in selecting study sites, and Dennis Holbrook, the
land owner, for granting us the access to the study site. We are
grateful to the Editor and the anonymous reviewers for their comments
and suggestions that helped to substantially improve the rigor and
clarity of this manuscript.
NR 49
TC 26
Z9 27
U1 1
U2 16
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 0885-6087
J9 HYDROL PROCESS
JI Hydrol. Process.
PD APR 15
PY 2009
VL 23
IS 8
BP 1236
EP 1246
DI 10.1002/hyp.7258
PG 11
WC Water Resources
SC Water Resources
GA 434DA
UT WOS:000265254200012
ER
PT J
AU Zelenyuka, A
Yang, J
Imre, D
AF Zelenyuka, Alla
Yang, Juan
Imre, Dan
TI Comparison between mass spectra of individual organic particles
generated by UV laser ablation and in the IR/UV two-step mode
SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
LA English
DT Article
DE Single particle mass spectrometry; Laser desorption; Laser ionization
ID AEROSOL-PARTICLES; ULTRAFINE PARTICLES; AIRBORNE PARTICLES;
SPECTROMETRY; SIZE; DESORPTION/IONIZATION; IONIZATION; INSTRUMENT;
SPLAT; PERFORMANCE
AB In ablation-based single particle mass spectrometry it is common to find that the mass spectra of particles with identical compositions exhibit significant particle-to-particle fluctuations and high degree of fragmentation. This is particularly true when it comes to particles containing organic compounds. At laser fluence that is sufficient to ionize sulfates, mass spectra of the identical organic particles are classified into multitude of classes, some of which are indistinguishable from elemental carbon. In contrast, the individual particle mass spectra generated in two-step mode, in which an IR laser pulse is used to evaporate the semivolatile particle components and a time delayed UV laser pulse is used to ionize the evaporating plume, exhibit greatly diminished particle-to-particle fluctuations and significantly improved mass spectral quality. Since individual particle mass spectra must first be classified and only then can be averaged and analyzed, the IR/UV mode greatly improves the capability to properly quantify particle compositions. We present an experimental investigation of the properties and behavior of individual particle mass spectra of organic particles that are generated by ablation and in the two-step mode as function of UV laser fluence and the delay between the two lasers. The study shows that the two-step mode yields highly reproducible mass spectra that contain sufficient detail to allow molecular identification. In addition it produces significantly higher mass spectral intensities that are linearly related to the mass of organics in the particles. In contrast, ablation generated mass spectra were found to exhibit high degree of fragmentation and large particle-to-particle fluctuations. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Zelenyuka, Alla; Yang, Juan] Pacific NW Natl Lab, Richland, WA 99354 USA.
[Imre, Dan] Imre Consulting, Richland, WA 99352 USA.
RP Zelenyuka, A (reprint author), Pacific NW Natl Lab, 3335 Q Ave K8-88, Richland, WA 99354 USA.
EM alla.zelenyuk@pnl.gov
RI Yang, Juan/F-5220-2010
OI Yang, Juan/0000-0001-5502-9351
FU U.S. Department of Energy Office of Basic Energy Sciences; Chemical
Sciences Division; Energy Efficiency and Renewable Energy; U.S.
Department of Energy by Battelle Memorial Institute [DE-AC06-76RL0 1830]
FX This work was supported by the U.S. Department of Energy Office of Basic
Energy Sciences, Chemical Sciences Division, and Energy Efficiency and
Renewable Energy. This research was performed in the Environmental
Molecular Sciences Laboratory, a national scientific user facility
sponsored by the Department of Energy's Office of Biological and
Environmental Research at Pacific Northwest National Laboratory (PNNL).
PNNL is operated by the U.S. Department of Energy by Battelle Memorial
Institute under contract no. DE-AC06-76RL0 1830.
NR 39
TC 13
Z9 13
U1 0
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1387-3806
J9 INT J MASS SPECTROM
JI Int. J. Mass Spectrom.
PD APR 15
PY 2009
VL 282
IS 1-2
BP 6
EP 12
DI 10.1016/j.ijms.2009.01.015
PG 7
WC Physics, Atomic, Molecular & Chemical; Spectroscopy
SC Physics; Spectroscopy
GA 434XO
UT WOS:000265307700002
ER
PT J
AU Anderson, BE
Ulrich, TJ
Griffa, M
Le Bas, PY
Scalerandi, M
Gliozzi, AS
Johnson, PA
AF Anderson, B. E.
Ulrich, T. J.
Griffa, M.
Le Bas, P. -Y.
Scalerandi, M.
Gliozzi, A. S.
Johnson, P. A.
TI Experimentally identifying masked sources applying time reversal with
the selective source reduction method
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
DE acoustic radiators; acoustic signal processing; hearing; nondestructive
testing
ID MATCHED-FIELD LOCALIZATION; SHALLOW-WATER; MISMATCH; FILTER; MEDIA;
SENSITIVITY; ENVIRONMENT; SCATTERING; ACOUSTICS; INVERSION
AB This paper describes a time reversal (TR) method of spatially illuminating a source signal which has been masked by another source signal. This masking occurs as a result of inherent limitations in the traditional TR process. The selective source reduction (SSR) method employs a subtraction technique where one TR focus is selectively reduced to illuminate the masked focus. Experimental results and considerations are presented to demonstrate the SSR method for two elastic wave pulses emitted simultaneously from two spatially separated surficial sources and to examine the limitations of the method. A blind test was conducted to demonstrate that no a priori information about the source(s) is required. Spatial and/or temporal characteristics of multiple close-proximity sources can be resolved with the use of the illumination method. The measurements show that the SSR method's limitations are chiefly due to imperfect temporal reconstruction of the source function in the time reversed focal signal, which consequently limits signal reduction.
C1 [Anderson, B. E.; Ulrich, T. J.; Griffa, M.; Le Bas, P. -Y.; Johnson, P. A.] Los Alamos Natl Lab, Geophys Grp, Los Alamos, NM 87544 USA.
[Scalerandi, M.; Gliozzi, A. S.] Politecn Torino, Dept Phys, CNISM, I-10129 Turin, Italy.
RP Anderson, BE (reprint author), Los Alamos Natl Lab, Geophys Grp, POB 1663, Los Alamos, NM 87544 USA.
EM bea@byu.edu; michele.griffa@empa.ch
RI Gliozzi, Antonio/G-7769-2012; Anderson, Brian/G-8819-2012;
OI GLIOZZI, ANTONIO/0000-0003-1084-0444; SCALERANDI,
MARCO/0000-0003-0809-9976; Griffa, Michele/0000-0001-8407-9438; Johnson,
Paul/0000-0002-0927-4003
FU Los Alamos National Laboratory
FX This research was supported by institutional support (LDRD) at the Los
Alamos National Laboratory. The authors are grateful for the discussions
and insight provided by Robert Guyer, Carene Larmat, Francesco
Simonetti, and Jim TenCate.
NR 50
TC 8
Z9 8
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD APR 15
PY 2009
VL 105
IS 8
AR 083506
DI 10.1063/1.3079517
PG 11
WC Physics, Applied
SC Physics
GA 471NH
UT WOS:000268064700032
ER
PT J
AU Bae, IT
Jiang, WL
Wang, CM
Weber, WJ
Zhang, YW
AF Bae, In-Tae
Jiang, Weilin
Wang, Chongmin
Weber, William J.
Zhang, Yanwen
TI Thermal evolution of microstructure in ion-irradiated GaN
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
DE amorphous semiconductors; annealing; crystal microstructure; electron
diffraction; electron energy loss spectra; gallium compounds; III-V
semiconductors; ion beam effects; nanofabrication; nanostructured
materials; recrystallisation; semiconductor thin films; transmission
electron microscopy; wide band gap semiconductors
ID SOLID-PHASE EPITAXY; IMPLANTED GAN; SILICON-CARBIDE; THIN-FILMS; BEAM;
AMORPHIZATION; DISORDER; DEFECTS; GAAS
AB The thermal evolution of the microstructure created by irradiation of a GaN single crystal with 2 MeV Au(2+) ions at 150 K is characterized following annealing at 973 K using transmission electron microscopy. In the as-irradiated sample characterized at 300 K, Ga nanocrystals with the diamond structure, which is an unstable configuration for Ga, are directly observed together with nitrogen bubbles in the irradiation-induced amorphous layer. A simple model is proposed to explain Ga nanocrystal formation. Upon thermal annealing, the thickness of the amorphous layer decreases by similar to 13.1% and nanobeam electron diffraction analysis indicates no evidence for residual Ga nanocrystals, but instead reveals a mixture of hexagonal and cubic GaN phases in the annealed sample. Nitrogen molecules, captured in the as-irradiated bubbles, appear to disassociate and react with Ga nanocrystals during the thermal annealing to form crystalline GaN. In addition, electron energy loss spectroscopy measurements reveal an volume change of 18.9% for the as-irradiated amorphous layer relative to the virgin single crystal GaN. This relative swelling of the damaged layer reduces to 7.7% after thermal annealing. Partial recrystallization and structural relaxation of the GaN amorphous state are believed responsible for the volume change.
C1 [Bae, In-Tae; Jiang, Weilin; Wang, Chongmin; Weber, William J.; Zhang, Yanwen] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Bae, In-Tae] SUNY Binghamton, Small Scale Syst Integrat & Packaging Ctr, Binghamton, NY 13902 USA.
RP Zhang, YW (reprint author), Pacific NW Natl Lab, POB 999,Box 999,MS K8-87, Richland, WA 99352 USA.
EM yanwen.zhang@pnl.gov
RI Weber, William/A-4177-2008;
OI Weber, William/0000-0002-9017-7365; Jiang, Weilin/0000-0001-8302-8313
FU Division of Materials Sciences and Engineering; Office of Basic Energy
Sciences; U.S. Department of Energy [DE-AC05-76RL01830]; Department of
Energy's Office of Biological and Environmental Research; Empire State
Development Corporation
FX This research was supported by the Division of Materials Sciences and
Engineering, Office of Basic Energy Sciences, U.S. Department of Energy
under Contract No. DE-AC05-76RL01830. A portion of the research was
performed using EMSL, a national scientific user facility sponsored by
the Department of Energy's Office of Biological and Environmental
Research and located at Pacific Northwest National Laboratory. Support
of S3IP at SUNY Binghamton was provided by Empire State
Development Corporation.
NR 28
TC 13
Z9 13
U1 1
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD APR 15
PY 2009
VL 105
IS 8
AR 083514
DI 10.1063/1.3106606
PG 7
WC Physics, Applied
SC Physics
GA 471NH
UT WOS:000268064700040
ER
PT J
AU Bazarov, IV
Dunham, BM
Liu, XH
Virgo, M
Dabiran, AM
Hannon, F
Sayed, H
AF Bazarov, Ivan V.
Dunham, Bruce M.
Liu, Xianghong
Virgo, Matt
Dabiran, Amir M.
Hannon, Fay
Sayed, Hisham
TI Thermal emittance and response time measurements of a GaN photocathode
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
DE gallium compounds; III-V semiconductors; photocathodes; photoemission;
wide band gap semiconductors
ID NEGATIVE ELECTRON-AFFINITY; GAAS; ENERGY; PHOTOEMISSION; PARAMETERS;
SURFACES; INN
AB We present the measurements of thermal emittance and response time for a GaN photocathode illuminated with 5 ps pulses at 260 nm wavelength. The thermal emittance was measured downstream of a 100 kV dc gun using a solenoid scan with a wire scanner and a beam viewscreen and was found to be 1.35 +/- 0.11 mm mrad normalized rms emittance per 1 mm rms of illuminated spot size. The response time of the photoemitted electrons was evaluated using a deflecting mode rf cavity synchronized to the laser pulses and was found to be prompt within the time resolution capability of our setup.
C1 [Bazarov, Ivan V.; Dunham, Bruce M.; Liu, Xianghong] Cornell Univ, Cornell Lab Accelerator Based Sci, Ithaca, NY 14853 USA.
[Virgo, Matt] Argonne Natl Lab, Argonne, IL 60439 USA.
[Dabiran, Amir M.] SVT Associates, Eden Prairie, MN 55344 USA.
[Hannon, Fay; Sayed, Hisham] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
RP Bazarov, IV (reprint author), Cornell Univ, Cornell Lab Accelerator Based Sci, Ithaca, NY 14853 USA.
EM ib38@cornell.edu
RI Kamal Sayed, Hisham/C-8602-2015
OI Kamal Sayed, Hisham/0000-0002-6178-8394
FU NSF [PHY0131508]; NSF/NIH-NIGMS [DMR0225180]; DOE [DE-FG02-06ER84506]
FX We acknowledge Dimitre Ouzoujnov for the laser system support, Yulin Li
and Karl Smolenski for their technical support. This work is supported
by NSF (Grant No. PHY0131508) and NSF/NIH-NIGMS (Award No. DMR0225180).
The work at SVTA is partially supported by DOE (Grant No.
DE-FG02-06ER84506).
NR 27
TC 18
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U1 0
U2 10
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD APR 15
PY 2009
VL 105
IS 8
AR 083715
DI 10.1063/1.3110075
PG 4
WC Physics, Applied
SC Physics
GA 471NH
UT WOS:000268064700088
ER
PT J
AU Bu, W
Vaknin, D
AF Bu, Wei
Vaknin, David
TI X-ray fluorescence spectroscopy from ions at charged vapor/water
interfaces
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
DE fluorescence; Langmuir-Blodgett films; monolayers; X-ray fluorescence
analysis
ID GRAZING-INCIDENCE DIFFRACTION; ANOMALOUS SCATTERING; LANGMUIR
MONOLAYERS; AIR/WATER INTERFACE; LIQUID INTERFACE; WATER-SURFACE;
REFLECTION; CESIUM; DISTRIBUTIONS; MONOVALENT
AB X-ray fluorescence spectra from monovalent ions (Cs+) that accumulate from dilute solutions to form an ion-rich layer near a charged Langmuir monolayer are presented. For the salt solution without the monolayer, the fluorescence signals below the critical angle are significantly lower than the detection sensitivity and only above the critical angle signals from the bulk are observed. In the presence of a monolayer that provides surface charges, strong fluorescence signals below the critical angle are observed. Ion density accumulated at the interface are determined from the fluorescence. The fluorescent spectra collected as a function of incident x-ray energy near the L-III edge yield the extended absorption spectra from the ions, and are compared to recent independent results. The fluorescence data from divalent Ba2+ with and without monolayer are also presented.
C1 [Bu, Wei] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
RP Bu, W (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
EM vaknin@ameslab.gov
RI Vaknin, David/B-3302-2009; Bu, Wei/Q-1390-2016
OI Vaknin, David/0000-0002-0899-9248; Bu, Wei/0000-0002-9996-3733
FU U.S. DOE, Basic Energy Sciences, Office of Science [DE-AC02-07CH11358];
U.S. Department of Energy, Office of Science, Office of Basic Energy
Sciences, [DE-AC02-06CH11357]
FX We thank D. S. Robinson for technical support at the 6-ID beamline. Ames
Laboratory and the MUCAT sector at the APS are supported by the U.S.
DOE, Basic Energy Sciences, Office of Science, under contract under
Contract No. DE-AC02-07CH11358. Use of the Advanced Photon Source was
supported by the U.S. Department of Energy, Office of Science, Office of
Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
NR 28
TC 19
Z9 19
U1 0
U2 12
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD APR 15
PY 2009
VL 105
IS 8
AR 084911
DI 10.1063/1.3117487
PG 6
WC Physics, Applied
SC Physics
GA 471NH
UT WOS:000268064700192
ER
PT J
AU DeMange, P
Colvin, JD
Park, HS
Pollaine, SM
AF DeMange, P.
Colvin, J. D.
Park, H. S.
Pollaine, S. M.
TI Reverberation technique for yield strength experiments at ultrahigh
pressure and strain rate
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
DE aluminium; copper; laser velocimeters; measurement by laser beam;
mechanical variables measurement; titanium; yield strength
ID CONSTITUTIVE RELATIONS; EXTREME CONDITIONS; MATERIAL DYNAMICS;
DEFORMATION; SPALLATION; TANTALUM; STRESS; SOLIDS; METALS; MODEL
AB Ultrahigh pressure and strain-rate (pressure 10 GPa and strain rate 10(5) s(-1)) are now attainable using high-power laser systems. A laser pulse drives a shock through a reservoir material which then unloads onto the target specimen. Laser velocimetry measurements at the back surface of the specimen are used to infer the material response. Material strength experiments have been proposed in which the pressure wave reverberates within the specimen and the cumulative resistance to compression by material strength is measured from the recorded velocimetry signature. In this work, ultrahigh pressure and strain-rate reverberation experiments are performed in tantalum, aluminum, and copper to investigate the yield strength behavior in this extreme regime. The experimental results indicate that the measurement sensitivity to yield strength is dominated by the lateral wave effects or impeded by the occurrence of spall. However, computer hydrodynamic code simulations are used to develop an experimental design based on shaping of the laser drive pulse that circumvents these difficulties. Simulations using the Steinberg-Guinan yield strength model and applying the design indicate the capability of measuring a factor-of-2 strength deviation from that predicted by the model with accuracy equal to or greater than the velocimetry measurement error.
C1 [DeMange, P.; Colvin, J. D.; Park, H. S.; Pollaine, S. M.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP DeMange, P (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA.
EM demange1@llnl.gov
OI Park, Hae-Sim/0000-0003-2614-0303
FU U. S. Department of Energy [DE-AC52-07NA27344]
FX This work performed under the auspices of the U. S. Department of Energy
by Lawrence Livermore National Laboratory under Contract No.
DE-AC52-07NA27344.
NR 39
TC 2
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U1 1
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD APR 15
PY 2009
VL 105
IS 8
AR 083543
DI 10.1063/1.3093840
PG 9
WC Physics, Applied
SC Physics
GA 471NH
UT WOS:000268064700069
ER
PT J
AU Follstaedt, DM
Lee, SR
Allerman, AA
Floro, JA
AF Follstaedt, D. M.
Lee, S. R.
Allerman, A. A.
Floro, J. A.
TI Strain relaxation in AlGaN multilayer structures by inclined
dislocations
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
DE aluminium compounds; crystal microstructure; dislocation jogs; gallium
compounds; III-V semiconductors; MOCVD; semiconductor epitaxial layers;
semiconductor growth; semiconductor heterojunctions; transmission
electron microscopy; vacancies (crystal); vapour phase epitaxial growth;
wide band gap semiconductors; X-ray diffraction
ID LIGHT-EMITTING-DIODES; MISFIT DISLOCATIONS; LAYER SUPERLATTICES; ISLAND
COALESCENCE; GAN LAYERS; THIN-FILMS; STRESSES; DEFECTS; GROWTH;
REDUCTION
AB To examine further the strain relaxation produced by inclined threading dislocations in AlGaN, a heterostructure with three AlGaN layers having successively increasing Ga contents and compressive strains was grown on an AlN template layer by metalorganic vapor-phase epitaxy. The strain state of the layers was determined by x-ray diffraction (XRD) and the dislocation microstructure was characterized with transmission electron microscopy (TEM). As the GaN mole fraction of the heterostructure increased from 0.15 to 0.48, the increased epitaxial strain produced inclined dislocations with successively greater bend angles. Using the observed bend angles, which ranged from 6.7 degrees to 17.8 degrees, the measured strain relaxation within each layer was modeled and found to be accounted for by threading-dislocation densities of 6-7x10(9)/cm(2), in reasonable agreement with densities determined by TEM and XRD. In addition to the influence of lattice-mismatch strain on the average bend angle, we found evidence that local strain inhomogeneities due to neighboring dislocations influence the specific bend angles of individual dislocations. This interaction with local strain fields may contribute to the large spread in the bend angles observed within each layer. A detailed TEM examination found that the initial bending of threading dislocations away from vertical often occurs at positions within < 15 nm of the AlGaN/AlN heterointerface. Under the assumption that dislocation climb mediated by bulk-defect diffusion is effectively suppressed at the growth temperature, this result implies that inclination is established by processes occurring at the dynamic growth surface. We describe a mechanism where dislocation bending occurs by means of dislocation-line jogs created when surface steps overgrow vacancies that attach to threading-dislocation cores at their intersection with the growth surface.
C1 [Follstaedt, D. M.; Lee, S. R.; Allerman, A. A.] Sandia Natl Labs, Phys Chem & Nano Sci Ctr, Albuquerque, NM 87185 USA.
[Floro, J. A.] Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA.
RP Follstaedt, DM (reprint author), Sandia Natl Labs, Phys Chem & Nano Sci Ctr, POB 5800, Albuquerque, NM 87185 USA.
EM srlee@sandia.gov
FU Laboratory Directed Research and Development Program; Division of
Materials Science and Engineering, Office of Basic Energy Sciences, U.S.
Department of Energy; Defense Advanced Research Projects Agency;
[DE-AC04-94AL85000]
FX The authors thank M. Rye for producing the FIB specimens, M. Smith for
assistance with XRD, and J. Figiel for assistance with the MOVPE
growths. The authors also appreciate discussions with J. A. Knapp on
image presentation. This work was jointly supported by the Laboratory
Directed Research and Development Program at Sandia National
Laboratories, by the Division of Materials Science and Engineering,
Office of Basic Energy Sciences, U.S. Department of Energy, and by the
Defense Advanced Research Projects Agency under the SAIL project. Sandia
is a multiprogram laboratory operated by Sandia Corporation, a Lockheed
Martin Co., for the United States Department of Energy's National
Nuclear Security Administration under Contract No. DE-AC04-94AL85000.
NR 41
TC 63
Z9 63
U1 8
U2 76
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD APR 15
PY 2009
VL 105
IS 8
AR 083507
DI 10.1063/1.3087515
PG 13
WC Physics, Applied
SC Physics
GA 471NH
UT WOS:000268064700033
ER
PT J
AU Gessert, TA
Yoshida, Y
Fesenmaier, CC
Coutts, TJ
AF Gessert, T. A.
Yoshida, Y.
Fesenmaier, C. C.
Coutts, T. J.
TI Sputtered In2O3 and ITO thin films containing zirconium
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
DE carrier density; indium compounds; infrared spectra; permittivity;
semiconductor thin films; sputtered coatings; transparency; zirconium
ID MOLYBDENUM
AB Additions of Zr to In2O3 (IO) and In2O3:SnO2 (ITO) sputtered thin films are studied. We find that Zr allows IO-based films to maintain optical transparency as oxygen partial pressure in the sputter ambient decreases, and it also maintains high carrier concentration as the oxygen partial pressure increases. Applying this guidance could indicate pathways to improve film properties in large-area deposition systems. We also find that for films deposited at optimum oxygen partial pressure, the optical transparency of the IO-based films improves as Zr is added, especially in the near-infrared spectral region. Analysis of these films using Drude theory approximations indicate that optical improvement is due to an increase in dielectric permittivity caused by Zr addition. We propose that controlling dielectric permittivity may be an important strategy in improving other transparent conducting oxides (TCOs), as well as indicative of an important pathway to developing new TCOs.
C1 [Gessert, T. A.; Yoshida, Y.; Fesenmaier, C. C.; Coutts, T. J.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Gessert, TA (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM tim_gessert@nrel.gov
FU [DE-AC36-08-GO28308]
FX This work is supported or funded under Contract No. DE-AC36-08-GO28308.
NR 10
TC 15
Z9 15
U1 0
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD APR 15
PY 2009
VL 105
IS 8
AR 083547
DI 10.1063/1.3116542
PG 6
WC Physics, Applied
SC Physics
GA 471NH
UT WOS:000268064700073
ER
PT J
AU Grant, CD
Crowhurst, JC
Arsenlis, T
Bringa, EM
Wang, YM
Hawreliak, JA
Pauzauskie, PJ
Clark, SM
AF Grant, C. D.
Crowhurst, J. C.
Arsenlis, T.
Bringa, E. M.
Wang, Y. M.
Hawreliak, J. A.
Pauzauskie, P. J.
Clark, S. M.
TI X-ray diffraction of electrodeposited nanocrystalline nickel under high
pressure
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
DE elastic moduli; electrodeposition; grain size; high-pressure effects;
nanostructured materials; nickel; reflection; X-ray diffraction
ID NONHYDROSTATIC COMPRESSION; STRENGTH; POWDER; GOLD; GPA
AB We studied the compressibility of monolithic fully dense electrodeposited nanocrystalline Ni (similar to 29 nm grain size) under both quasihydrostatic and nonhydrostatic conditions up to a nominal pressure of 50 GPa using angle-dispersive x-ray diffraction. We obtained an equation of state consistently and unambiguously from each measured reflection. The apparent bulk modulus measured under nonhydrostatic conditions is larger than that of the corresponding coarse-grained material under either type of compression, but is nearly the same when measured under quasihydrostatic conditions. These results may be consistent with a strength, but not necessarily a bulk modulus, that is enhanced in the nanomaterial relative to its coarse-grained counterparts.
C1 [Grant, C. D.; Crowhurst, J. C.; Arsenlis, T.; Wang, Y. M.; Hawreliak, J. A.; Pauzauskie, P. J.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Bringa, E. M.] Univ Nacl Cuyo, Inst Ciencias Basicas, RA-5500 Mendoza, Argentina.
[Clark, S. M.] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Grant, CD (reprint author), Lawrence Livermore Natl Lab, POB 5508, Livermore, CA 94551 USA.
EM grant29@llnl.gov
RI Bringa, Eduardo/F-8918-2011; Pauzauskie, Peter/A-1316-2014; Wang, Yinmin
(Morris)/F-2249-2010; Clark, Simon/B-2041-2013
OI Wang, Yinmin (Morris)/0000-0002-7161-2034; Clark,
Simon/0000-0002-7488-3438
FU U. S. Department of Energy [DE-AC0205CH11231, W-7405-Eng-48,
DE-AC52-07NA27344]; Laboratory Directed Research and Development Program
[06-SI-005]
FX We thank J. Benterou for laser-cutting our nc-Ni disk sample. We thank
J. Kuntz, A. Caro, and A. Bliss for their assistance in sample
preparation and for useful discussions. The Advanced Light Source is
supported by the Director, Office of Science, Office of Basic Energy
Sciences, of the U. S. Department of Energy under Contract No.
DE-AC0205CH11231. This work was performed under the auspices of the U.
S. Department of Energy by Lawrence Livermore National Laboratory in
part under Contract No. W-7405-Eng-48 and in part under Contract No.
DE-AC52-07NA27344. The project 06-SI-005 was funded by the Laboratory
Directed Research and Development Program at LLNL.
NR 29
TC 8
Z9 9
U1 1
U2 13
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD APR 15
PY 2009
VL 105
IS 8
AR 084311
DI 10.1063/1.3100189
PG 6
WC Physics, Applied
SC Physics
GA 471NH
UT WOS:000268064700150
ER
PT J
AU Hoche, D
Shinn, M
Muller, S
Schaaf, P
AF Hoeche, Daniel
Shinn, Michelle
Mueller, Sven
Schaaf, Peter
TI Diffusion, convection, and solidification in cw-mode free electron laser
nitrided titanium
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
DE coatings; convection; diffusion; free electron lasers; laser beam
effects; materials preparation; microhardness; nanoindentation;
nitrogen; scanning electron microscopy; sheet materials; solidification;
stress effects; surface hardening; titanium; tribology; X-ray
diffraction
ID TINX COATINGS; THIN-FILMS; NITROGEN; IRRADIATION; ORIENTATION; TEXTURE;
METALS; GROWTH; GAS
AB Titanium sheets were irradiated by free electron laser radiation in cw mode in pure nitrogen. Due to the interaction, nitrogen diffusion occurs and titanium nitride was synthesized in the tracks. Overlapping tracks have been utilized to create coatings in order to improve the tribological properties of the sheets. Caused by the local heating and the spatial dimension of the melt pool, convection effects were observed and related to the track properties. Stress, hardness, and nitrogen content were investigated with x-ray diffraction, nanoindention, and resonant nuclear reaction analysis. The measured results were correlated with the scan parameters, especially to the lateral track shift. Cross section micrographs were prepared and investigated by means of scanning electron microscopy. They show the solidification behavior, phase formation, and the nitrogen distribution. The experiments give an insight into the possibilities of materials processing using such a unique heat source.
C1 [Hoeche, Daniel; Mueller, Sven] Univ Gottingen, Inst Phys 2, D-37077 Gottingen, Germany.
[Shinn, Michelle] Thomas Jefferson Natl Accelerator Facil, Free Elect Laser Grp, Newport News, VA 23606 USA.
[Schaaf, Peter] Tech Univ Ilmenau, Inst Werkstofftech, FG Werkstoffe Elektrotech, D-98684 Ilmenau, Germany.
RP Hoche, D (reprint author), Univ Gottingen, Inst Phys 2, Friedrich Hund Pl 1, D-37077 Gottingen, Germany.
EM dhoeche@gwdg.de; peter.schaaf@tu-ilmenau.de
RI Hoche, Daniel/G-8556-2013; Schaaf, Peter/B-4934-2009
OI Hoche, Daniel/0000-0002-7719-6684; Schaaf, Peter/0000-0002-8802-6621
FU Deutsche Forschungsgemeinschaft [DFG Scha 632/4]; U.S. Dept. of Energy;
Office of Naval Research; Commonwealth of Virginia; Laser Processing
Consortium
FX This work is supported by the Deutsche Forschungsgemeinschaft under
Grant No. DFG Scha 632/4. The Jefferson Laboratory is supported by the
U.S. Dept. of Energy, the Office of Naval Research, the Commonwealth of
Virginia, and the Laser Processing Consortium. Kevin Jordan and Joseph
F. Gubeli III are gratefully acknowledged for their assistance at the
FEL.
NR 34
TC 4
Z9 4
U1 1
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD APR 15
PY 2009
VL 105
IS 8
AR 083503
DI 10.1063/1.3097781
PG 6
WC Physics, Applied
SC Physics
GA 471NH
UT WOS:000268064700029
ER
PT J
AU Sabau, AS
Duty, CE
Dinwiddie, RB
Nichols, M
Blue, CA
Ott, RD
AF Sabau, Adrian S.
Duty, Chad E.
Dinwiddie, Ralph B.
Nichols, Mark
Blue, Craig A.
Ott, Ronald D.
TI A radiative transport model for heating paints using high density plasma
arc lamps
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
DE arc lamps; heat radiation; paints
ID ORIGINAL TOPCOATS 1974-1989; SPECTRAL OPTICAL-PROPERTIES;
FINITE-DIFFERENCE SOLUTIONS; INFRARED-SPECTRA; INORGANIC PIGMENTS;
NONUNIFORM GRIDS; REFRACTIVE-INDEX; STIFF PROBLEMS; THIN-FILM;
SCATTERING
AB The energy distribution and temperature evolution within paintlike systems that are exposed to spectral radiant energy were studied. A complete set of material properties was derived and discussed. Infrared measurements were conducted to obtain experimental data for the temperature in the paint film. The heat flux due to the incident radiation from the plasma arc lamp was measured using a heat flux sensor with a very short response time. A radiative transport model based on spectral four-flux radiation transport equations has been developed for multilayered and semitransparent material systems. Comparisons between the computed and experimental results for temperature show that the energy transport model yields accurate results for a black painted substrate.
C1 [Sabau, Adrian S.; Duty, Chad E.; Dinwiddie, Ralph B.; Nichols, Mark; Blue, Craig A.; Ott, Ronald D.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Nichols, Mark] Ford Motor Co, Mat & Nanotechnol Dept, Ford Res & Adv Engn, Dearborn, MI 48126 USA.
RP Sabau, AS (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Bldg 4508,MS 6083, Oak Ridge, TN 37831 USA.
EM sabaua@ornl.gov
RI Sabau, Adrian/B-9571-2008;
OI Sabau, Adrian/0000-0003-3088-6474; Dinwiddie, Ralph/0000-0003-1670-470X
FU DARPA; Strategic Technology Office; Oak Ridge National Laboratory
(ORNL); U.S. Department of Energy [DE-AC05-00OR22725]
FX This research was sponsored by DARPA, Strategic Technology Office, for
initial studies. Research also sponsored by the Laboratory Directed
Research and Development Program of Oak Ridge National Laboratory
(ORNL), managed by UT-Battelle, LLC for the U.S. Department of Energy
under Contract No. DE-AC05-00OR22725.
NR 31
TC 3
Z9 3
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD APR 15
PY 2009
VL 105
IS 8
AR 084901
DI 10.1063/1.3097356
PG 12
WC Physics, Applied
SC Physics
GA 471NH
UT WOS:000268064700182
ER
PT J
AU Sootsman, JR
He, JQ
Dravid, VP
Li, CP
Uher, C
Kanatzidis, MG
AF Sootsman, Joseph R.
He, Jiaqing
Dravid, Vinayak P.
Li, Chang-Peng
Uher, Ctirad
Kanatzidis, Mercouri G.
TI High thermoelectric figure of merit and improved mechanical properties
in melt quenched PbTe-Ge and PbTe-Ge1-xSix eutectic and hypereutectic
composites
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
DE brittleness; carrier density; composite materials; electrical
conductivity; elemental semiconductors; eutectic structure; fracture
toughness; germanium; Ge-Si alloys; IV-VI semiconductors; lead
compounds; melt processing; thermal conductivity; thermoelectricity
ID THERMAL-CONDUCTIVITY; SOLID-SOLUTIONS; ALLOYS; NANOSTRUCTURES;
AGPBMSBTE2+M; SYSTEM; POWER
AB We report the synthesis, microstructure, and transport properties of composite thermoelectric materials based on the eutectic phase relationship between PbTe and Ge. When quenched, these eutectic mixtures exhibit considerably stronger mechanical strength and reduced brittleness compared to PbTe itself, while at the same time they possess lower lattice thermal conductivity. Thermal conductivity measurements show values lower than expected based on the law of mixtures and multiphase composites. We find that the thermoelectric performance in these composites can be tuned through the use of hypereutectic compositions and alloying of Ge with Si. PbI2 was used as an n-type dopant, and precise control of the carrier concentration was achieved to optimize the electrical transport and thermoelectric properties. ZT values approaching 1.3 at 778 K have been obtained in samples of PbTe-Ge0.8Si0.2(5%), which represent an similar to 62% improvement over that of PbTe.
C1 [Sootsman, Joseph R.; Kanatzidis, Mercouri G.] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
[He, Jiaqing; Dravid, Vinayak P.] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.
[Li, Chang-Peng; Uher, Ctirad] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
[Kanatzidis, Mercouri G.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Sootsman, JR (reprint author), Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA.
EM m-kanatzidis@northwestern.edu
RI Dravid, Vinayak/B-6688-2009; He, Jiaqing/A-2245-2010
FU NSF-NSEC; NSF-MRSEC; Keck Foundation; State of Illinois; Northwestern
University
FX Financial support from the Office of Naval Research is gratefully
acknowledged. Portions of the scanning electron microscopy work was
performed in the (EPIC) (NIFTI) (Keck-II) Facility of NUANCE Center at
Northwestern University. NUANCE Center is supported by NSF-NSEC,
NSF-MRSEC, Keck Foundation, the State of Illinois, and Northwestern
University.
NR 41
TC 30
Z9 30
U1 4
U2 30
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD APR 15
PY 2009
VL 105
IS 8
AR 083718
DI 10.1063/1.3093833
PG 8
WC Physics, Applied
SC Physics
GA 471NH
UT WOS:000268064700091
ER
PT J
AU Worsley, MA
Satcher, JH
Baumann, TF
AF Worsley, Marcus A.
Satcher, Joe H., Jr.
Baumann, Theodore F.
TI Enhanced thermal transport in carbon aerogel nanocomposites containing
double-walled carbon nanotubes
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
DE aerogels; carbon nanotubes; nanocomposites; nanotechnology;
polymerisation; pyrolysis; scanning electron microscopy; sol-gel
processing; surfactants; suspensions; thermal conductivity
ID ELECTRICAL-CONDUCTIVITY; COMPOSITES; SUSPENSIONS; ELECTRODES; MANAGEMENT
AB We report thermal conductivity measurements of a carbon aerogel nanocomposite containing double-walled carbon nanotubes. The nanocomposites were prepared by the sol-gel polymerization of resorcinol with formaldehyde in aqueous suspension containing a surfactant-stabilized dispersion of double-walled carbon nanotubes. Subsequent drying and pyrolysis resulted in free-standing monolithic carbon aerogel nanocomposites with uniform dispersions of carbon nanotubes. The monoliths were characterized by high-resolution scanning electron microscopy and thermal conductivity measurements via the transient hot-wire method. Enhanced thermal conductivities were observed for carbon aerogel nanocomposites relative to pristine carbon aerogels. The details of these results are discussed in comparison with theory and literature.
C1 [Worsley, Marcus A.; Satcher, Joe H., Jr.; Baumann, Theodore F.] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA 94551 USA.
RP Worsley, MA (reprint author), Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, 7000 E Ave, Livermore, CA 94551 USA.
EM worsley1@llnl.gov
RI Worsley, Marcus/G-2382-2014
OI Worsley, Marcus/0000-0002-8012-7727
FU U. S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]; DOE Office of Energy Efficiency and Renewable
Energy
FX This work was performed under the auspices of the U. S. Department of
Energy by Lawrence Livermore National Laboratory under Contract No.
DE-AC52-07NA27344 and funded by the DOE Office of Energy Efficiency and
Renewable Energy.
NR 29
TC 13
Z9 13
U1 0
U2 29
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD APR 15
PY 2009
VL 105
IS 8
AR 084316
DI 10.1063/1.3117491
PG 4
WC Physics, Applied
SC Physics
GA 471NH
UT WOS:000268064700155
ER
PT J
AU Slater, SC
Goldman, BS
Goodner, B
Setubal, JC
Farrand, SK
Nester, EW
Burr, TJ
Banta, L
Dickerman, AW
Paulsen, I
Otten, L
Suen, G
Welch, R
Almeida, NF
Arnold, F
Burton, OT
Du, ZJ
Ewing, A
Godsy, E
Heisel, S
Houmiel, KL
Jhaveri, J
Lu, J
Miller, NM
Norton, S
Chen, Q
Phoolcharoen, W
Ohlin, V
Ondrusek, D
Pride, N
Stricklin, SL
Sun, J
Wheeler, C
Wilson, L
Zhu, HJ
Wood, DW
AF Slater, Steven C.
Goldman, Barry S.
Goodner, Brad
Setubal, Joao C.
Farrand, Stephen K.
Nester, Eugene W.
Burr, Thomas J.
Banta, Lois
Dickerman, Allan W.
Paulsen, Ian
Otten, Leon
Suen, Garret
Welch, Roy
Almeida, Nalvo F.
Arnold, Frank
Burton, Oliver T.
Du, Zijin
Ewing, Adam
Godsy, Eric
Heisel, Sara
Houmiel, Kathryn L.
Jhaveri, Jinal
Lu, Jing
Miller, Nancy M.
Norton, Stacie
Chen, Qiang
Phoolcharoen, Waranyoo
Ohlin, Victoria
Ondrusek, Dan
Pride, Nicole
Stricklin, Shawn L.
Sun, Jian
Wheeler, Cathy
Wilson, Lindsey
Zhu, Huijun
Wood, Derek W.
TI Genome Sequences of Three Agrobacterium Biovars Help Elucidate the
Evolution of Multichromosome Genomes in Bacteria
SO JOURNAL OF BACTERIOLOGY
LA English
DT Article
ID CROWN-GALL; SINORHIZOBIUM-MELILOTI; BRUCELLA-MELITENSIS;
BIOLOGICAL-CONTROL; TUMEFACIENS C58; CELL-CYCLE; PLASMID; PROKARYOTES;
DISEASE; GRAPE
AB The family Rhizobiaceae contains plant-associated bacteria with critical roles in ecology and agriculture. Within this family, many Rhizobium and Sinorhizobium strains are nitrogen-fixing plant mutualists, while many strains designated as Agrobacterium are plant pathogens. These contrasting lifestyles are primarily dependent on the transmissible plasmids each strain harbors. Members of the Rhizobiaceae also have diverse genome architectures that include single chromosomes, multiple chromosomes, and plasmids of various sizes. Agrobacterium strains have been divided into three biovars, based on physiological and biochemical properties. The genome of a biovar I strain, A. tumefaciens C58, has been previously sequenced. In this study, the genomes of the biovar II strain A. radiobacter K84, a commercially available biological control strain that inhibits certain pathogenic agrobacteria, and the biovar III strain A. vitis S4, a narrow-host-range strain that infects grapes and invokes a hypersensitive response on nonhost plants, were fully sequenced and annotated. Comparison with other sequenced members of the Alphaproteobacteria provides new data on the evolution of multipartite bacterial genomes. Primary chromosomes show extensive conservation of both gene content and order. In contrast, secondary chromosomes share smaller percentages of genes, and conserved gene order is restricted to short blocks. We propose that secondary chromosomes originated from an ancestral plasmid to which genes have been transferred from a progenitor primary chromosome. Similar patterns are observed in select Beta- and Gammaproteobacteria species. Together, these results define the evolution of chromosome architecture and gene content among the Rhizobiaceae and support a generalized mechanism for second-chromosome formation among bacteria.
C1 [Slater, Steven C.] Univ Wisconsin, Great Lakes Bioenergy Res Ctr, Madison, WI 53706 USA.
[Goldman, Barry S.; Du, Zijin; Godsy, Eric; Heisel, Sara; Lu, Jing; Miller, Nancy M.; Norton, Stacie; Stricklin, Shawn L.; Zhu, Huijun] Monsanto Co, St Louis, MO 63167 USA.
[Goodner, Brad; Arnold, Frank; Ewing, Adam; Ohlin, Victoria; Ondrusek, Dan; Pride, Nicole; Wheeler, Cathy; Wilson, Lindsey] Hiram Coll, Dept Biol, Hiram, OH 44234 USA.
[Setubal, Joao C.] Virginia Polytech Inst & State Univ, Dept Comp Sci, Blacksburg, VA 24060 USA.
[Setubal, Joao C.; Dickerman, Allan W.; Almeida, Nalvo F.; Jhaveri, Jinal; Sun, Jian] Virginia Polytech Inst & State Univ, Virginia Bioinformat Inst, Blacksburg, VA 24060 USA.
[Farrand, Stephen K.] Univ Illinois, Dept Microbiol, Urbana, IL 61801 USA.
[Nester, Eugene W.; Wood, Derek W.] Univ Washington, Dept Microbiol, Seattle, WA 98195 USA.
[Burr, Thomas J.] Cornell Univ, New York State Agr Expt Stn, Dept Plant Pathol, Geneva, NY 14456 USA.
[Banta, Lois; Burton, Oliver T.] Williams Coll, Dept Biol, Williamstown, MA 01267 USA.
[Paulsen, Ian] Macquarie Univ, Dept Chem & Biomol Sci, N Ryde, NSW 2109, Australia.
[Otten, Leon] Inst Plant Mol Biol, F-67084 Strasbourg, France.
[Suen, Garret; Welch, Roy] Syracuse Univ, Dept Biol, Syracuse, NY 13244 USA.
[Almeida, Nalvo F.] Univ Fed Mato Grosso do Sul, Dept Comp & Stat, Campo Grande, Brazil.
[Houmiel, Kathryn L.; Chen, Qiang; Phoolcharoen, Waranyoo] Arizona State Univ, Biodesign Inst, Tempe, AZ 85287 USA.
[Houmiel, Kathryn L.; Wood, Derek W.] Seattle Pacific Univ, Dept Biol, Seattle, WA 98119 USA.
RP Setubal, JC (reprint author), Virginia Bioinformat Inst, Washington St,MC 0477, Blacksburg, VA 24060 USA.
EM setubal@vt.edu
RI Almeida, Nalvo/B-5856-2012; Setubal, Joao/C-7305-2012; Paulsen,
Ian/K-3832-2012; Oncogenomica, Inct/H-9999-2013; Ewing,
Adam/M-3164-2014;
OI Setubal, Joao/0000-0001-9174-2816; Paulsen, Ian/0000-0001-9015-9418;
Ewing, Adam/0000-0002-4544-994X; Suen, Garret/0000-0002-6170-711X;
Almeida, Nalvo/0000-0001-5615-1746; chen, qiang/0000-0003-1498-7013;
Welch, Roy/0000-0002-9946-108X
FU National Science Foundation [0333297, 0603491, 0736671]; M.J. Murdock
Charitable Trust Life Sciences program [2004262, 2006245]; Howard Hughes
Medical Institute [52005125]; Conselho Nacional de Desenvolvimento
Cientifico e Tecnologico fellowship [200447/2007-6]; Monsanto Company
FX This work was supported by National Science Foundation grants 0333297
and 0603491 to E.W.N. and 0736671 to S. C. S., grants from the M.J.
Murdock Charitable Trust Life Sciences program (2004262: JVZ and
2006245: JVZ) to D. W. W., by a science education grant from the Howard
Hughes Medical Institute to B.G. (52005125), by a Conselho Nacional de
Desenvolvimento Cientifico e Tecnologico fellowship to N.F.A. (no.
200447/2007-6), and by the Monsanto Company.
NR 49
TC 104
Z9 672
U1 4
U2 29
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0021-9193
J9 J BACTERIOL
JI J. Bacteriol.
PD APR 15
PY 2009
VL 191
IS 8
BP 2501
EP 2511
DI 10.1128/JB.01779-08
PG 11
WC Microbiology
SC Microbiology
GA 427AS
UT WOS:000264752600008
PM 19251847
ER
PT J
AU Foster, JT
Beckstrom-Sternberg, SM
Pearson, T
Beckstrom-Sternberg, JS
Chain, PSG
Roberto, FF
Hnath, J
Brettin, T
Keim, P
AF Foster, Jeffrey T.
Beckstrom-Sternberg, Stephen M.
Pearson, Talima
Beckstrom-Sternberg, James S.
Chain, Patrick S. G.
Roberto, Francisco F.
Hnath, Jonathan
Brettin, Tom
Keim, Paul
TI Whole-Genome-Based Phylogeny and Divergence of the Genus Brucella
SO JOURNAL OF BACTERIOLOGY
LA English
DT Article
ID SINGLE-NUCLEOTIDE POLYMORPHISMS; REAL-TIME PCR; RAPID IDENTIFICATION;
BACTERIAL EVOLUTION; GENETIC DIVERSITY; DNA POLYMORPHISM; SEQUENCE;
ABORTUS; STRAINS; SUIS
AB Brucellae are worldwide bacterial pathogens of livestock and wildlife, but phylogenetic reconstructions have been challenging due to limited genetic diversity. We assessed the taxonomic and evolutionary relationships of five Brucella species-Brucella abortus, B. melitensis, B. suis, B. canis, and B. ovis-using whole-genome comparisons. We developed a phylogeny using single nucleotide polymorphisms (SNPs) from 13 genomes and rooted the tree using the closely related soil bacterium and opportunistic human pathogen, Ochrobactrum anthropi. Whole-genome sequencing and a SNP-based approach provided the requisite level of genetic detail to resolve species in the highly conserved brucellae. Comparisons among the Brucella genomes revealed 20,154 orthologous SNPs that were shared in all genomes. Rooting with Ochrobactrum anthropi reveals that the B. ovis lineage is basal to the rest of the Brucella lineage. We found that B. suis is a highly divergent clade with extensive intraspecific genetic diversity. Furthermore, B. suis was determined to be paraphyletic in our analyses, only forming a monophyletic clade when the B. canis genome was included. Using a molecular clock with these data suggests that most Brucella species diverged from their common B. ovis ancestor in the past 86,000 to 296,000 years, which precedes the domestication of their livestock hosts. Detailed knowledge of the Brucella phylogeny will lead to an improved understanding of the ecology, evolutionary history, and host relationships for this genus and can be used for determining appropriate genotyping approaches for rapid detection and diagnostic assays for molecular epidemiological and clinical studies.
C1 [Foster, Jeffrey T.; Beckstrom-Sternberg, Stephen M.; Pearson, Talima; Beckstrom-Sternberg, James S.; Keim, Paul] No Arizona Univ, Ctr Microbial Genet & Genom, Flagstaff, AZ 86011 USA.
[Chain, Patrick S. G.] Joint Genome Inst, Microbial Program, Walnut Creek, CA 94598 USA.
[Chain, Patrick S. G.] Lawrence Livermore Natl Lab, Biosci & Biotechnol Div, Livermore, CA 94550 USA.
[Beckstrom-Sternberg, Stephen M.] Translat Genom Res Inst, Phoenix, AZ 85004 USA.
[Chain, Patrick S. G.] Michigan State Univ, Ctr Microbial Ecol, E Lansing, MI 48824 USA.
[Chain, Patrick S. G.] Michigan State Univ, Dept Microbiol & Mol Genet, E Lansing, MI 48824 USA.
[Roberto, Francisco F.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
[Hnath, Jonathan] Natl Biodef Anal & Countermeasures Ctr, Frederick, MD 21703 USA.
[Brettin, Tom] Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
RP Keim, P (reprint author), No Arizona Univ, Ctr Microbial Genet & Genom, Flagstaff, AZ 86011 USA.
EM paul.keim@nau.edu
RI Keim, Paul/A-2269-2010; chain, patrick/B-9777-2013;
OI Foster, Jeffrey/0000-0001-8235-8564
FU U.S. Department of Homeland Security; Intelligence Technology Innovation
Center
FX This study was supported by the U.S. Department of Homeland Security.
Sequencing of the B. canis genome was funded by the Intelligence
Technology Innovation Center. We thank Jim Burans and the staff at the
National Bioforensics Analysis Center for the 454 pyrosequencing data.
Use of product or trade names does not constitute endorsement by the
U.S. Government.
NR 51
TC 72
Z9 75
U1 3
U2 13
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0021-9193
J9 J BACTERIOL
JI J. Bacteriol.
PD APR 15
PY 2009
VL 191
IS 8
BP 2864
EP 2870
DI 10.1128/JB.01581-08
PG 7
WC Microbiology
SC Microbiology
GA 427AS
UT WOS:000264752600045
PM 19201792
ER
PT J
AU Crosby, LD
Kathmann, SM
Windus, TL
AF Crosby, Lonnie D.
Kathmann, Shawn M.
Windus, Theresa L.
TI Implementation of Dynamical Nucleation Theory with Quantum Potentials
SO JOURNAL OF COMPUTATIONAL CHEMISTRY
LA English
DT Article
DE dynamical nucleation theory; water dimer; nucleation; Monte Carlo; ab
initio methods
ID CORRELATED MOLECULAR CALCULATIONS; FREE-ENERGY PERTURBATION;
TRANSITION-STATE THEORY; GAUSSIAN-BASIS SETS; TIP5P WATER MODEL;
ANTHROPOGENIC AEROSOLS; VAPOR; KINETICS; LIQUID; SENSITIVITY
AB A method is implemented within the context of dynamical nucleation theory in order to efficiently determine the ab initio water dimer evaporation rate constant. The drive for increased efficiency in a Monte Carlo methodology is established by the need to use relatively expensive quantum mechanical interaction potentials. A discussion is presented illustrating the theory, algorithm, and implementation of this method to the water dimer. Hartree-Fock and second order Moller-Plesset perturbation theories along with the Dang-Chang polarizable classical potential are utilized to determine the ab initio water dimer evaporation rate constant. (C) 2008 Wiley Periodicals, Inc. J Cornput Chern 30: 743-749, 2009
C1 [Crosby, Lonnie D.; Windus, Theresa L.] Iowa State Univ, Dept Chem, Ames, IA 50011 USA.
[Crosby, Lonnie D.; Windus, Theresa L.] Ames Lab, Ames, IA USA.
[Kathmann, Shawn M.] Pacific NW Natl Lab, Div Chem & Mat Sci, Mol Interact & Transformat Grp, Richland, WA 99352 USA.
RP Windus, TL (reprint author), Iowa State Univ, Dept Chem, Ames, IA 50011 USA.
EM theresa@fi.ameslab.gov
OI Crosby, Lonnie D/0000-0003-4283-4137
FU Iowa State University; U.S. Department of Energy (DOE) Office of Basic
Energy Sciences; Chemical Sciences program
FX T. L. Windus and L. D. Crosby gratefully acknowledge Iowa State
University for providing funding and computational resources. This work
was also supported by the U.S. Department of Energy (DOE) Office of
Basic Energy Sciences, Chemical Sciences program, and it was performed
in part using the Molecular Science Computing Facility (MSCF) in the
William R. Wiley Environmental Molecular Sciences Laboratory, a DOE
national scientific user facility located at the Pacific Northwest
National Laboratory (PNNL). PNNL is operated by Battelle for the U.S.
Department of Energy.
NR 37
TC 4
Z9 4
U1 1
U2 8
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0192-8651
J9 J COMPUT CHEM
JI J. Comput. Chem.
PD APR 15
PY 2009
VL 30
IS 5
BP 743
EP 749
DI 10.1002/jcc.21098
PG 7
WC Chemistry, Multidisciplinary
SC Chemistry
GA 419NI
UT WOS:000264225900006
PM 18711716
ER
PT J
AU Henager, CH
Edwards, DJ
Schemer-Kohrn, AL
Bliss, M
Jaffe, JE
AF Henager, C. H., Jr.
Edwards, D. J.
Schemer-Kohrn, A. L.
Bliss, M.
Jaffe, J. E.
TI Preferential orientation of Te particles in melt-grown CZT
SO JOURNAL OF CRYSTAL GROWTH
LA English
DT Article
DE Characterization; Crystal morphology; Interfaces; Bridgman technique;
Semiconducting cadmium compounds
ID TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; X-RAY; CDTE; CRYSTALS;
DEFECTS; CDZNTE; NONSTOICHIOMETRY; (CD,ZN)TE; DETECTORS
AB Cadmium zinc telluride (Cd(1-x)Zn(x)Te or CZT) has proved to be a useful material for semiconductor gamma-ray spectrometers and other electro-optic devices. It is often grown Te-rich to optimize its electrical characteristics, but this off-stoichiometric growth leads to the formation of semimetallic Te particles in the semiconducting host crystal. These particles can impair device performance and their formation needs to be inhibited, if possible, during growth. In this study, characterization of several particles of different faceted shapes revealed that most of the Te particles were preferentially oriented with the {101}(CZT)parallel to{(1) over bar2 (1) over bar0}(Te). A secondary orientation relationship was also observed as {11 (1) over bar}(CZT)parallel to{01 (1) over bar1}(Te) for one of the {111}(CZT) family of planes. One of the particles exhibited {110}(CZT)parallel to{01 (1) over bar0}Te, and (001)(CZT)parallel to{0001}(Te). Particles were often found on {111}(CZT) twin boundaries and, in these cases, it was possible to assign specific orientations with respect to the twin plane. Ab initio calculations predicted a good lattice match between the {0001}-plane of Te aligned with the {111}-plane of CZT, however, no such particle orientation was observed. Observations of strained and polycrystalline Te particles are also discussed with relevance to the ab initio model and to impacts on electronic properties. (C) 2009 Published by Elsevier B.V.
C1 [Henager, C. H., Jr.; Edwards, D. J.; Schemer-Kohrn, A. L.] Pacific NW Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA.
[Bliss, M.] Pacific NW Natl Lab, Natl Secur Directorate, Richland, WA 99352 USA.
[Jaffe, J. E.] Pacific NW Natl Lab, Fundamental & Computat Sci Directorate, Richland, WA 99352 USA.
RP Henager, CH (reprint author), Pacific NW Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA.
EM chuck.henager@pnl.gov
RI Bliss, Mary/G-2240-2012;
OI Bliss, Mary/0000-0002-7565-4813; Henager, Chuck/0000-0002-8600-6803
FU Office of Defense Nuclear Nonproliferation; Office of Nonproliferation
Research and Development [NA-22]
FX PNNL is operated for the US Department of Energy by Battelle Memorial
Institute under Contract DE-AC06-76RLO 1830. This work was funded at
PNNL by the Office of Defense Nuclear Nonproliferation, Office of
Nonproliferation Research and Development (NA-22).
NR 24
TC 10
Z9 10
U1 0
U2 9
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-0248
J9 J CRYST GROWTH
JI J. Cryst. Growth
PD APR 15
PY 2009
VL 311
IS 9
BP 2641
EP 2647
DI 10.1016/j.jcrysgro.2009.03.002
PG 7
WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied
SC Crystallography; Materials Science; Physics
GA 454GY
UT WOS:000266671600008
ER
PT J
AU Schneider, ZV
Simmons-Potter, K
Boyle, TJ
AF Schneider, Z. V.
Simmons-Potter, K.
Boyle, T. J.
TI Photomodification of heteroleptic titanium-based, complex metal
alkoxides
SO JOURNAL OF NON-CRYSTALLINE SOLIDS
LA English
DT Article
DE Photocatalysis; Optical spectroscopy; Photoinduced effects; Solution
chemistry
ID SUBSTITUTED AROMATIC KETONES; THIN-FILMS; GEL FILMS; TRANSPARENT
AB A heteroleptic titanium metal alkoxide (OPy)(2)Ti(4MP)(2), where OPy=NC5H4(CH2O)-2 and 4MP = OC6H4(SH)-4, was investigated as a candidate precursor for the solution-based (sol-gel) synthesis of titanium oxide via the photoactivation of intermolecular linking reactions (e.g., hydrolysis/condensation). The evolution of the electronic structure of the solution-based molecule arising from conventional (dark) chemical reaction kinetics was compared with that of samples exposed to ultraviolet (UV) radiation at wavelengths of lambda = 337.1 nm and 405 nm using UV-visible absorption spectroscopy. Photoinduced changes in the spectra were examined as a function of both the incident wavelength of exposure and the total fluence. Experimental results confirm the UV-induced modification of spectral absorption features, attributed to ligand-localized and charge transfer transitions accompanied by structural changes associated with hydrolysis and condensation. The photoenhancement of reaction kinetics in these processes was confirmed by the increased modification of the absorption features in the solution spectra, which saturated more rapidly under W-illumination than under dark conditions. Similar saturation behaviors were observed for both the 337.1 nm and the 405 rim incident wavelengths with the same total deposited energy density indicating a relative insensitivity of the photoinduced response to excitation energy for the wavelengths and fluences studied. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Schneider, Z. V.; Simmons-Potter, K.] Univ Arizona, Tucson, AZ 85721 USA.
[Boyle, T. J.] Sandia Natl Labs, Adv Mat Lab, Albuquerque, NM 87106 USA.
RP Schneider, ZV (reprint author), Univ Arizona, 1630 E Univ Blvd, Tucson, AZ 85721 USA.
EM ZVS@email.arizona.edu
FU United States Department of Energy, Office of Basic Energy Sciences
[DE-AC04-94AL85000]; University of Arizona; State of Arizona; TRIF
Optics Initiative Program; Sandia National Laboratories
FX The authors would like to acknowledge B.C. Potter Jr., J.D. Musgraves,
and N. Jacobsen for their contributions to this work. This research was
supported by the United States Department of Energy, Office of Basic
Energy Sciences. Partial support was also provided by the University of
Arizona, State of Arizona, TRIF Optics Initiative Program and by Sandia
National Laboratories. Sandia is a multi-program laboratory operated by
Sandia Corporation, a Lockheed Martin Company for the United States
Department of Energy's National Nuclear Security Administration under
Contract DE-AC04-94AL85000.
NR 14
TC 2
Z9 2
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3093
EI 1873-4812
J9 J NON-CRYST SOLIDS
JI J. Non-Cryst. Solids
PD APR 15
PY 2009
VL 355
IS 9
BP 536
EP 540
DI 10.1016/j.jnoncrysol.2009.02.002
PG 5
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA 444OX
UT WOS:000265991400004
ER
PT J
AU Rest, J
Hofman, GL
Kim, YS
AF Rest, J.
Hofman, G. L.
Kim, Yeon Soo
TI Analysis of intergranular fission-gas bubble-size distributions in
irradiated uranium-molybdenum alloy fuel
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID RE-SOLUTION; GROWTH; UO2
AB An analytical model for the nucleation and growth of intra and intergranular fission-gas bubbles is used to characterize fission-gas bubble development in low-enriched U-Mo alloy fuel irradiated in the advanced test reactor in Idaho as part of the Reduced Enrichment for Research and Test Reactor (RERTR) program. Fuel burnup was limited to less than similar to 7.8 at.% U in order to capture the fuel-swelling stage prior to irradiation-induced recrystallization. The model couples the calculation of the time evolution of the average intergranular bubble radius and number density to the calculation of the intergranular bubble-size distribution based on differential growth rate and sputtering coalescence processes. Recent results on TEM analysis of intragranular bubbles in U-Mo were used to set the irradiation-induced diffusivity and re-solution rate in the bubble-swelling model. Using these values, good agreement was obtained for intergranular bubble distribution compared against measured post-irradiation examination (PIE) data using grain-boundary diffusion enhancement factors of 15-125, depending on the Mo concentration. This range of enhancement factors is consistent with values obtained in the literature. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Rest, J.; Hofman, G. L.; Kim, Yeon Soo] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Rest, J (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM jrest@anl.gov
FU US Government [DE-AC-02-06CH11357]; US Department of Energy; Office of
Global Threat Reduction; National Nuclear Security Administration (NNSA)
[DE-AC-02-06CH11357]
FX The submitted manuscript has been authored by a contractor of the US
Government under contract NO.DE-AC-02-06CH11357. Accordingly, the US
government retains a non-exclusive royalty-free license to publish or
reproduce the published form of this contribution, or allow others to do
so, for US Government purposes. Work supported by US Department of
Energy, Office of Global Threat Reduction, National Nuclear Security
Administration (NNSA), under Contract DE-AC-02-06CH11357.
NR 18
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U1 0
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 15
PY 2009
VL 385
IS 3
BP 563
EP 571
DI 10.1016/j.jnucmat.2009.01.001
PG 9
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 437ED
UT WOS:000265468100011
ER
PT J
AU Miller, MK
Chernobaeva, AA
Shtrombakh, YI
Russell, KF
Nanstad, RK
Erak, DY
Zabusov, OO
AF Miller, M. K.
Chernobaeva, A. A.
Shtrombakh, Y. I.
Russell, K. F.
Nanstad, R. K.
Erak, D. Y.
Zabusov, O. O.
TI Evolution of the nanostructure of VVER-1000 RPV materials under neutron
irradiation and post irradiation annealing
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID PRESSURE-VESSEL STEELS; 3-DIMENSIONAL ATOM-PROBE; CR-MO-V;
MICROSTRUCTURAL CHARACTERIZATION; RADIATION EMBRITTLEMENT; APFIM
CHARACTERIZATION; POSITRON-ANNIHILATION; WELD; SEGREGATION; PERSPECTIVE
AB A high nickel VVER-1000 (15Kh2NMFAA) base metal (1.34 wt% Ni, 0.47% Mn, 0.29% Si and 0.05% Cu), and a high nickel (12Kh2N2MAA) weld metal (1.77 wt% Ni, 0.74% Mn, 0.26% Si and 0.07% Cu) have been characterized by atom probe tomography to determine the changes in the microstructure during neutron irradiation to high fluences. The base metal was studied in the unirradiated condition and after neutron irradiation to fluences between 2.4 and 14.9 x 10(23) m(-2) (E > 0.5 MeV), and the weld metal was studied in the unirradiated condition and after neutron irradiation to fluences between 2.4 and 11.5 x 10(23) m(-2) (E > 0.5 MeV). High number densities of similar to 2-nm-diameter Ni-, Si- and Mn-enriched nanoclusters were found in the neutron irradiated base and weld metals. No significant copper enrichment was associated with these nanoclusters and no copper-enriched precipitates were observed. The number densities of these nanoclusters correlate with the shifts in the Delta T(41) (J) ductile-to-brittle transition temperature. These nanoclusters were present after a post irradiation anneal of 2 h at 450 degrees C, but had dissolved into the matrix after 24 h at 450 degrees C. Phosphorus, nickel, silicon and to a lesser extent manganese were found to be segregated to the dislocations. Published by Elsevier B.V.
C1 [Miller, M. K.; Russell, K. F.; Nanstad, R. K.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Chernobaeva, A. A.; Shtrombakh, Y. I.; Erak, D. Y.; Zabusov, O. O.] Kurchatov Inst, Russian Res Ctr, Moscow, Russia.
RP Miller, MK (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, POB 2008, Oak Ridge, TN 37831 USA.
EM millermk@ornl.gov
RI Zabusov, Oleg/N-9307-2013; Shtrombakh, Yaroslav/O-1081-2013; Erak,
Dmitry/A-9595-2014
OI Zabusov, Oleg/0000-0003-3482-7885;
FU Basic Energy Sciences, U.S. Department of Energy; Office of Nuclear
Regulatory Research; U.S. Nuclear Regulatory Commission [1886-N695-3W,
DE-AC05-00OR22725]; International Science and Technology Center (ISTC)
[3420]
FX The authors thank Dr S.S. Babu for providing the DICTRA calculations.
Research at the Oak Ridge National Laboratory SHaRE User Facility was
sponsored by Basic Energy Sciences, U.S. Department of Energy and by the
Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory
Commission, under inter-agency agreement 1886-N695-3W and under contract
DE-AC05-00OR22725 with UT-Battelle, LLC. Research at the Russian
Research Center, Kurchatov Institute was performed under the
International Science and Technology Center (ISTC) Project 3420.
NR 50
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U1 2
U2 20
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 15
PY 2009
VL 385
IS 3
BP 615
EP 622
DI 10.1016/j.jnucmat.2009.01.299
PG 8
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 437ED
UT WOS:000265468100018
ER
PT J
AU Ryu, HJ
Kim, YS
Hofman, GL
AF Ryu, Ho Jin
Kim, Yeon Soo
Hofman, G. L.
TI Amorphization of the interaction products in U-Mo/Al dispersion fuel
during irradiation
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID POSTIRRADIATION EXAMINATION; REACTION LAYER; MO; URANIUM; REACTORS;
BEHAVIOR; SYSTEM; U3SI2
AB The microstructures of the product resulting from interaction between U-Mo fuel particles and the Al matrix in U-Mo/Al dispersion fuel are discussed. We analyzed the available characterization results for the Al matrix dispersion fuels from both the out-of-pile and in-pile tests and examined the difference between these results. The morphology of pores that form in the interaction products during irradiation is similar to the porosity previously observed in irradiation-induced amorphized uranium compounds. The available diffraction studies for the interaction products formed in both the out-of-pile and in-pile tests are analyzed. We have concluded that the interaction products in the U-Mo/Al dispersion fuel are formed as an amorphous state or become amorphous during irradiation, depending on the irradiation conditions. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Ryu, Ho Jin] Korea Atom Energy Res Inst, Recycled Fuel Dev Div, Taejon 305353, South Korea.
[Kim, Yeon Soo; Hofman, G. L.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Ryu, HJ (reprint author), Korea Atom Energy Res Inst, Recycled Fuel Dev Div, 150 Deokjin Dong, Taejon 305353, South Korea.
EM hjryu@kaeri.re.kr
RI RYU, HO JIN/J-2764-2013
OI RYU, HO JIN/0000-0002-3387-7381
FU Ministry of Education, Science and Technology of Korea (MEST); Korea
Research Foundation [KRF-2005-214-D00116]
FX One of the authors is grateful for the support of the National Nuclear
Research Program by the Ministry of Education, Science and Technology of
Korea (MEST) and the Korea Research Foundation Grant with the Grant
number of KRF-2005-214-D00116.
NR 34
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Z9 28
U1 1
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 15
PY 2009
VL 385
IS 3
BP 623
EP 628
DI 10.1016/j.jnucmat.2009.01.306
PG 6
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 437ED
UT WOS:000265468100019
ER
PT J
AU Fu, EG
Carter, J
Swadener, G
Misra, A
Shao, L
Wang, H
Zhang, X
AF Fu, E. G.
Carter, J.
Swadener, G.
Misra, A.
Shao, L.
Wang, H.
Zhang, X.
TI Size dependent enhancement of helium ion irradiation tolerance in
sputtered Cu/V nanolaminates
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID MECHANICAL-PROPERTIES; ALLOYS; METALS; ACCUMULATION; BEHAVIOR; CREEP
AB We have investigated the evolution of radiation damage and changes in hardness of sputter-deposited Cu/V nanolaminates upon room temperature helium ion irradiation. As the individual layer thickness decreases from 200 to 5 nm, helium bubble density and radiation hardening both decrease. The magnitude of radiation hardening becomes negligible for individual layer thickness of 2.5 nm or less. These observations indicate that nearly immiscible Cu/V interface can effectively absorb radiation-induced point defects and reduce their concentrations. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Fu, E. G.; Zhang, X.] Texas A&M Univ, Dept Mech Engn, Mat Sci & Engn Program, College Stn, TX 77843 USA.
[Carter, J.; Shao, L.] Texas A&M Univ, Dept Nucl Engn, College Stn, TX 77843 USA.
[Swadener, G.; Misra, A.] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87543 USA.
[Wang, H.] Texas A&M Univ, Dept Elect & Comp Engn, College Stn, TX 77843 USA.
RP Zhang, X (reprint author), Texas A&M Univ, Dept Mech Engn, Mat Sci & Engn Program, College Stn, TX 77843 USA.
EM zhangx@tamu.edu
RI Zhang, Xinghang/H-6764-2013; Wang, Haiyan/P-3550-2014;
OI Zhang, Xinghang/0000-0002-8380-8667; Wang, Haiyan/0000-0002-7397-1209;
Swadener, John G/0000-0001-5493-3461
FU DOE-NERI; Office of Nuclear Energy, Science and Technology; AFCI program
[DE-FC07-05ID14657]; NRC Early Career Development
FX XZ acknowledges financial support by DOE-NERI, Office of Nuclear Energy,
Science and Technology, AFCI program, under Grant No. DE-FC07-05ID14657.
L. Shao acknowledges the support from NRC Early Career Development
Grant. Discussion with Dr K.T. Hartwig is appreciated. The access to a
user facility, the Microscopy and Imaging Center at Texas A&M
University, is also acknowledged.
NR 20
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U1 4
U2 26
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
EI 1873-4820
J9 J NUCL MATER
JI J. Nucl. Mater.
PD APR 15
PY 2009
VL 385
IS 3
BP 629
EP 632
DI 10.1016/j.jnucmat.2008.12.308
PG 4
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 437ED
UT WOS:000265468100020
ER
PT J
AU Liu, WN
Sun, X
Stephens, E
Khaleel, MA
AF Liu, W. N.
Sun, X.
Stephens, E.
Khaleel, M. A.
TI Life prediction of coated and uncoated metallic interconnect for solid
oxide fuel cell applications
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE Ferritic stainless steel interconnect; Crofer 22 APU; Solid oxide fuel
cell (SOFC); Oxide scale; Spinel coating; Indentation test
ID FERRITIC STAINLESS-STEELS; OXIDATION BEHAVIOR; STRESS; SCALES; ALLOY;
ADHESION; GROWTH; TEMPERATURE; ADDITIONS; COATINGS
AB In this paper, we present an integrated experimental and modeling methodology in predicting the life of coated and uncoated metallic interconnect (IC) for solid oxide fuel cell (SOFC) applications. The ultimate goal is to provide cell designer and manufacture with a predictive methodology such that the life of the IC system can be managed and optimized through different coating thickness to meet the overall cell designed life. Crofer 22 APU is used as the example IC material system. The life of coated and uncoated Crofer 22 APU under isothermal cooling was predicted by comparing the predicted interfacial strength and the interfacial stresses induced by the cooling process from the operating temperature to room temperature, together with the measured oxide scale growth kinetics. It was found that the interfacial strength between the oxide scale and the Crofer 22 APU substrate decreases with the growth of the oxide scale, and that the interfacial strength for the oxide scale/spinel coating interface is much higher than that of the oxide scale/Crofer 22 APU substrate interface. As expected, the predicted life of the coated Crofer 22 APU is significantly longer than that of the uncoated Crofer 22 APU. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Liu, W. N.; Sun, X.; Stephens, E.; Khaleel, M. A.] Pacific NW Natl Lab, Richland, WA 99354 USA.
RP Liu, WN (reprint author), Pacific NW Natl Lab, POB 999,906 Battelle Blvd, Richland, WA 99354 USA.
EM wenning.liu@pnl.gov
OI khaleel, mohammad/0000-0001-7048-0749
FU U.S. Department of Energy's National Energy Technology Laboratory
FX The Pacific Northwest National Laboratory is operated by Battelle for
the U.S. Department of Energy under Contract DE-AC05-76RL01830. The work
was funded as part of the Solid-State Energy Conversion Alliance Core
Technology Program by the U.S. Department of Energy's National Energy
Technology Laboratory.
NR 40
TC 36
Z9 38
U1 1
U2 16
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-7753
J9 J POWER SOURCES
JI J. Power Sources
PD APR 15
PY 2009
VL 189
IS 2
BP 1044
EP 1050
DI 10.1016/j.jpowsour.2008.12.143
PG 7
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 434YN
UT WOS:000265310300026
ER
PT J
AU Wu, JW
Johnson, CD
Gemmen, RS
Liu, XB
AF Wu, Junwei
Johnson, Christopher D.
Gemmen, Randall S.
Liu, Xingbo
TI The performance of solid oxide fuel cells with Mn-Co electroplated
interconnect as cathode current collector
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE On-cell test; SOFC; Interconnect; Spinel; Electroplating
ID FERRITIC STAINLESS-STEELS; SOFC METALLIC INTERCONNECTS; OXIDATION
RESISTANCE; ALLOY INTERCONNECT; THERMAL-EXPANSION; COATINGS;
DEGRADATION; DEPOSITION; REDUCTION; COBALT
AB To add a coating on a metallic interconnect is one option to prevent Cr poisoning of the cathode and to retain high conductivity during solid oxide fuel cells (SOFC) operation. Electroplating of metals or alloys followed by oxidation offers a cost-effective method. In this study, pure Co and Mn/Co alloys formed by electrodeposition are used to protect the substrate, SUS 430. On-cell tests, using uncoated, cobalt-coated and MnCo-coated interconnects were conducted at 375 mA cm(-2) for 323, 500 and 820 h, respectively. The results show that cell power degrades at a rate of 33% in 320h using an uncoated interconnect. Significant improvements are obtained for cell tests utilizing unoptimized coated interconnects with the degradation rate of 5% and 9% per 1000 h for cobalt and MnCo coatings, respectively. Based on the results from SEM and XRD studies, the advantages of both coatings are to successfully inhibit Cr diffusion to the scale surface. However, thin (similar to 2 mu m) cobalt coating allows fast scale growth, while thicker cobalt coatings have the potential to fail due to mismatch in the coefficient of temperature expansion (CTE) between Co(3)O(4) and the SUS 430 substrate. In spite of higher degradation rate for the MnCo coatings evaluated here, the addition of Mn into the cobalt coating not only aids in suppression of scale growth, but also reduces the CTE mismatch. Furthermore, no performance decay after two thermal cycles was observed. Finally, the cell degradation was observed to have a correlation with the cell cathode interlayer microstructure. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Wu, Junwei; Johnson, Christopher D.; Gemmen, Randall S.; Liu, Xingbo] US DOE, Natl Energy Technol Lab, Morgantown, WV 26507 USA.
[Wu, Junwei; Liu, Xingbo] W Virginia Univ, Dept Mech & Aerosp Engn, Morgantown, WV 26506 USA.
RP Liu, XB (reprint author), US DOE, Natl Energy Technol Lab, Morgantown, WV 26507 USA.
EM xingbo.liu@mail.wvu.edu
NR 36
TC 60
Z9 62
U1 6
U2 35
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-7753
J9 J POWER SOURCES
JI J. Power Sources
PD APR 15
PY 2009
VL 189
IS 2
BP 1106
EP 1113
DI 10.1016/j.jpowsour.2008.12.079
PG 8
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 434YN
UT WOS:000265310300034
ER
PT J
AU Zhang, YH
Cao, R
Yin, F
Hudock, MP
Guo, RT
Krysiak, K
Mukherjee, S
Gao, YG
Robinson, H
Song, Y
No, JH
Bergan, K
Leon, A
Cass, L
Goddard, A
Chang, TK
Lin, FY
Van Beek, E
Papapoulos, S
Wang, AHJ
Kubo, T
Ochi, M
Mukkamala, D
Oldfield, E
AF Zhang, Yonghui
Cao, Rong
Yin, Fenglin
Hudock, Michael P.
Guo, Rey-Ting
Krysiak, Kilannin
Mukherjee, Sujoy
Gao, Yi-Gui
Robinson, Howard
Song, Yongcheng
No, Joo Hwan
Bergan, Kyle
Leon, Annette
Cass, Lauren
Goddard, Amanda
Chang, Ting-Kai
Lin, Fu-Yang
Van Beek, Ermond
Papapoulos, Socrates
Wang, Andrew H. -J.
Kubo, Taclahiko
Ochi, Mitsuo
Mukkamala, Dushyant
Oldfield, Eric
TI Lipophilic Bisphosphonates as Dual Farnesyl/Geranylgeranyl Diphosphate
Synthase Inhibitors: An X-ray and NMR Investigation
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID NITROGEN-CONTAINING BISPHOSPHONATES; GERANYLGERANYL PYROPHOSPHATE
SYNTHASE; ZOLEDRONIC ACID; IN-VIVO; ISOPRENOID BIOSYNTHESIS;
TRYPANOSOMA-BRUCEI; ELECTRON-DENSITY; STRUCTURAL BASIS; T-CELLS; CANCER
AB Considerable effort has focused on the development of selective protein farnesyl transferase (FTase) and protein geranylgeranyl transferase (GGTase) inhibitors as cancer chemwotherapeutics. Here, we report a new strategy for anticancer therapeutic agents involving inhibition of farnesyl diphosphate synthase (FPPS) and geranylgeranyl diphosphate synthase (GGPPS), the two enzymes upstream of FTase and GGTase, by lipophilic bisphosphonates. Due to dual site targeting and decreased polarity, the compounds have activities far greater than do current bisphosphonate drugs in inhibiting tumor cell growth and invasiveness, both in vitro and in vivo. We explore how these compounds inhibit cell growth and how cell activity can be predicted based on enzyme inhibition data, and using X-ray diffraction, solid state NMR, and isothermal titration calorimetry, we show how these compounds bind to FPPS and/or GGPPS.
C1 [Zhang, Yonghui; Krysiak, Kilannin; Gao, Yi-Gui; Song, Yongcheng; Bergan, Kyle; Cass, Lauren; Goddard, Amanda; Chang, Ting-Kai; Oldfield, Eric] Univ Illinois, Dept Chem, Urbana, IL 61801 USA.
[Cao, Rong; Yin, Fenglin; Hudock, Michael P.; Mukherjee, Sujoy; No, Joo Hwan; Leon, Annette; Lin, Fu-Yang; Mukkamala, Dushyant; Oldfield, Eric] Univ Illinois, Ctr Biophys & Computat Biol, Urbana, IL 61801 USA.
[Guo, Rey-Ting; Wang, Andrew H. -J.] Acad Sinica, Inst Biol Chem, Sect 2, Taipei 115, Taiwan.
[Robinson, Howard] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
[Van Beek, Ermond; Papapoulos, Socrates] Leiden Univ, Med Ctr, Dept Endocrinol & Metab Dis, Leiden, Netherlands.
[Kubo, Taclahiko; Ochi, Mitsuo] Hiroshima Univ, Dept Orthoped Surg, Grad Sch Biomed Sci, Minami Ku, Hiroshima 7348551, Japan.
RP Oldfield, E (reprint author), Univ Illinois, Dept Chem, 600 S Mathews Ave, Urbana, IL 61801 USA.
EM eo@chad.scs.uiuc.edu
RI Hudock, Michael/B-3781-2009; Cao, Rong/A-7943-2010; Mukherjee,
Sujoy/E-5708-2011;
OI Krysiak, Kilannin/0000-0002-6299-9230
FU United States Public Health Service [GM065307, GM073216]; American Heart
Association; Midwest Affiliate. [0615564Z]; NIH Institutional NRSA in
Molecular Biophysics [GM008276]; Leukemia and Lymphoma Society Special
Fellowship
FX We thank K. Kavanagh and U. Oppermann for providing the human FPPS
expression system and for providing unpublished results and H. Sagarni
for providing the human GGPPS expression system. We thank the staff of
the Brookhaven National Laboratory, SER-CAT Advanced Photon Source at
Argonne National Laboratory, and the National Synchrotron Radiation
Research Center (Taiwan) Beamlines, for synchrotron time and support.
This work was supported by the United States Public Health Service (NIH
Grants GM065307 and GM073216). Y.Z. was supported by a Postdoctoral
Fellowship from the American Heart Association, Midwest Affiliate. A.L.
was supported by an NIH Institutional NRSA in Molecular Biophysics
(Grant GM008276). S.M. was supported by a Predoctoral Fellowship from
the American Heart Association, Midwest Affiliate (Award 0615564Z). Y.S.
was supported by a Leukemia and Lymphoma Society Special Fellowship. The
coordinates for the FPPS and GGPPS structures have been deposited in the
Protein Data Bank as 2opm, 3dyf, 3dyg, 3dyh, 3efq, 3egt, 2zeu, and 2zev.
NR 40
TC 99
Z9 100
U1 3
U2 33
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD APR 15
PY 2009
VL 131
IS 14
BP 5153
EP 5162
DI 10.1021/ja808285e
PG 10
WC Chemistry, Multidisciplinary
SC Chemistry
GA 431CN
UT WOS:000265039000040
PM 19309137
ER
PT J
AU Appel, AM
Lee, SJ
Franz, JA
DuBois, DL
DuBois, MR
AF Appel, Aaron M.
Lee, Suh-Jane
Franz, James A.
DuBois, Daniel L.
DuBois, M. Rakowski
TI Free Energy Landscapes for S-H Bonds in (Cp2Mo2S4)-Mo-star Complexes
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID MONONUCLEAR MOLYBDENUM ENZYMES; HYDRIDE DONOR ABILITIES; METAL FORMYL
COMPLEXES; SULFIDO LIGANDS; DIMOLYBDENUM COMPLEXES; SULFUR DIMERS;
HYDROGEN; ACTIVATION; CLUSTERS; ACETONITRILE
AB An extensive family of thermochemical data is presented for a series of complexes derived from CP*Mo(mu-S)(2)(mu-SMe)(mu-SH)MoCp* and Cp*Mo(mu-S)(2)(mu-SH)(2)MoCP*. These data include electrochemical potentials, pK(a) values, homolytic solution bond dissociation free energies (SBDFEs), and hydride donor abilities in acetonitrile. Thermochernical data ranged from +0.6 to -2.0 V vs FeCp2+/o for electrochemical potentials, 5 to 31 for pK(a) values, 43 to 68 kcal/mol for homolytic SBDFEs, and 44 to 84 kcal/mol for hydride donor abilities. The observed values for these thermodynamic parameters are comparable to those of many transition metal hydrides, which is consistent with the many parallels in the chemistry of these two classes of compounds. The extensive set of thermochemical data is presented in free energy landscapes as a useful approach to visualizing and understanding the relative stabilities of all of the species under varying conditions of pH and H-2 overpressure. In addition to the previously studied homogeneous reactivity and catalysis, Mo2S4 complexes are also models for heterogeneous molybdenum sulfide catalysts, and therefore, the present results demonstrate the dramatic range of S-H bond strengths available in both homogeneous and heterogeneous reaction pathways.
C1 [Appel, Aaron M.; Lee, Suh-Jane; Franz, James A.; DuBois, Daniel L.; DuBois, M. Rakowski] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Franz, JA (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA.
EM james.franz@pnl.gov
OI Appel, Aaron/0000-0002-5604-1253
FU U.S. Department of Energy's (DOE) Office of Basic Energy Sciences;
Chemical Sciences program
FX This work was supported by the U.S. Department of Energy's (DOE) Office
of Basic Energy Sciences, Chemical Sciences program. The Pacific
Northwest National Laboratory is operated by Battelle for DOE.
NR 53
TC 28
Z9 28
U1 2
U2 19
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD APR 15
PY 2009
VL 131
IS 14
BP 5224
EP 5232
DI 10.1021/ja8093179
PG 9
WC Chemistry, Multidisciplinary
SC Chemistry
GA 431CN
UT WOS:000265039000048
PM 19309157
ER
PT J
AU Spies, MA
Reese, JG
Dodd, D
Pankow, KL
Blanke, SR
Baudry, J
AF Spies, M. Ashley
Reese, Joseph G.
Dodd, Dylan
Pankow, Katherine L.
Blanke, Steven R.
Baudry, Jerome
TI Determinants of Catalytic Power and Ligand Binding in Glutamate Racemase
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID TRANSITION-STATE ANALOGS; PURINE NUCLEOSIDE PHOSPHORYLASE;
MOLECULAR-DYNAMICS SIMULATIONS; TRANSFER RNA-SYNTHETASE; GRAM-POSITIVE
BACTERIA; AMINO CARBON ACIDITY; ALANINE RACEMASE; BACILLUS-ANTHRACIS;
PROLINE RACEMASE; ENZYMATIC CATALYSIS
AB Glutamate racemases (EC 5.1.1.3) catalyze the cofactor-independent stereoinversion of D- and L-glutamate and are important for viability in several Gram-negative and -positive bacteria. As the only enzyme involved in the stereoinversion Of L- to D-glutamate for peptidoglycan biosynthesis, glutamate racemase is an attractive target for the design of antibacterial agents. However, the development of competitive tight-binding inhibitors has been problematic and highly species specific. Despite a number of recent crystal structures of cofactor-independent epimerases and racemases, cocrystallized with substrates or substrate analogues, the source of these enzymes' catalytic power and their ability to acidify the C alpha of amino acids remains unknown. The present integrated computational and experimental study focuses on the glutamate racemase from Bacillus subtilis (RacE). A particular focus is placed on the interaction of the glutamate carbanion intermediate with RacE. Results suggest that the reactive form of the RacE-glutamate carbanion complex, vis-a-vis proton abstraction from Ca, is significantly different than the RacE-D-glutamate complex on the basis of the crystal structure and possesses dramatically stronger enzyme-ligand interaction energy. In silico and experimental site-directed mutagenesis indicates that the strength of the RacE-glutamate carbanion interaction energy is highly distributed among numerous electrostatic interactions in the active site, rather than being dominated by strong hydrogen bonds. Results from this study are important for laying the groundwork for discovery and design of high-affinity ligands to this class of cofactor-independent racemases.
C1 [Spies, M. Ashley; Reese, Joseph G.; Pankow, Katherine L.] Univ Illinois, Dept Biochem, Urbana, IL 61801 USA.
[Spies, M. Ashley; Blanke, Steven R.] Univ Illinois, Inst Genom Biol, Urbana, IL 61801 USA.
[Dodd, Dylan; Blanke, Steven R.] Univ Illinois, Dept Microbiol, Urbana, IL 61801 USA.
[Baudry, Jerome] Oak Ridge Natl Lab, Ctr Biophys Mol, Oak Ridge, TN 37830 USA.
[Baudry, Jerome] Univ Tennessee, Dept Biochem & Cellular & Mol Biol, Knoxville, TN 37996 USA.
RP Spies, MA (reprint author), Univ Illinois, Dept Biochem, Urbana, IL 61801 USA.
EM aspies@life.uiuc.edu
FU NIH [A1076830, A1057156]
FX This work was supported by NIH A1076830 (M.A.S.) and NIH A1057156
(S.R.B.).
NR 89
TC 18
Z9 18
U1 2
U2 11
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD APR 15
PY 2009
VL 131
IS 14
BP 5274
EP 5284
DI 10.1021/ja809660g
PG 11
WC Chemistry, Multidisciplinary
SC Chemistry
GA 431CN
UT WOS:000265039000054
PM 19309142
ER
PT J
AU Sadtler, B
Demchenko, DO
Zheng, H
Hughes, SM
Merkle, MG
Dahmen, U
Wang, LW
Alivisatos, AP
AF Sadtler, Bryce
Demchenko, Denis O.
Zheng, Haimei
Hughes, Steven M.
Merkle, Maxwell G.
Dahmen, Ulrich
Wang, Lin-Wang
Alivisatos, A. Paul
TI Selective Facet Reactivity during Cation Exchange in Cadmium Sulfide
Nanorods
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; CDSE NANOCRYSTALS; HYBRID
NANOCRYSTALS; QUANTUM RODS; GROWTH; HETEROSTRUCTURES; NANOPARTICLES;
CHALCOCITE; KINETICS
AB The partial transformation of ionic nanocrystals through cation exchange has been used to synthesize nanocrystal heterostructures. We demonstrate that the selectivity for cation exchange to take place at different facets of the nanocrystal plays an important role in determining the resulting morphology of the binary heterostructure. In the case of copper(I) (Cu(+)) cation exchange in cadmium sulfide (CdS) nanorods, the reaction starts preferentially at the ends of the nanorods such that copper sulfide (Cu(2)S) grows inward from either end. The resulting morphology is very different from the striped pattern obtained in our previous studies of silver(I) (Ag(+)) exchange in CdS nanorods where nonselective nucleation of silver sulfide (Ag(2)S) occurs (Robinson, R. D.; Sadtler, B.; Demchenko, D. O.; Erdonmez, C. K.; Wang, L.-W.; Alivisatos, A. P. Science 2007, 317, 355-358). From interface formation energies calculated for several models of epitaxial connections between CdS and Cu(2)S or Ag(2)S, we infer the relative stability of each interface during the nucleation and growth of Cu(2)S or Ag(2)S within the CdS nanorods. The epitaxial attachments of Cu(2)S to the end facets of CdS nanorods minimize the formation energy, making these interfaces stable throughout the exchange reaction. Additionally, as the two end facets of wurtzite CdS nanorods are crystallographically nonequivalent, asymmetric heterostructures can be produced.
C1 [Sadtler, Bryce; Zheng, Haimei; Hughes, Steven M.; Merkle, Maxwell G.; Alivisatos, A. Paul] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Sadtler, Bryce; Zheng, Haimei; Dahmen, Ulrich; Alivisatos, A. Paul] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Demchenko, Denis O.; Wang, Lin-Wang] Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA.
RP Alivisatos, AP (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM alivis@berkeley.edu
RI Alivisatos , Paul /N-8863-2015
OI Alivisatos , Paul /0000-0001-6895-9048
FU Director, Office of Science; Office of Basic Energy Sciences; U.S.
Department of Energy [DE-AC02-05CH11231]
FX This work was supported by the Director, Office of Science, Office of
Basic Energy Sciences, of the U.S. Department of Energy under Contract
No. DE-AC02-05CH11231. The synthetic chemistry was developed under
funding through the Helios Solar Energy Research Center at Lawrence
Berkeley National Laboratory (LBNL). The theoretical modeling used
computational facilities at the National Energy Research Scientific
Computing Center (NERSC) at LBNL. EFTEM imaging was performed at the
National Center for Electron Microscopy (NCEM) at LBNL. H.Z. thanks M.
Watanabe, Z. Lee, and C. Song for their advice on EFTEM imaging. D.O.D.
thanks W. L. Lambrecht and P. Lukashev for providing the atomic
structure for high-temperature chalcocite. We thank R. Robinson for
useful discussions.
NR 36
TC 205
Z9 206
U1 12
U2 212
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD APR 15
PY 2009
VL 131
IS 14
BP 5285
EP 5293
DI 10.1021/ja809854q
PG 9
WC Chemistry, Multidisciplinary
SC Chemistry
GA 431CN
UT WOS:000265039000055
PM 19351206
ER
PT J
AU Abrahams, MR
Anderson, JA
Giorgi, EE
Seoighe, C
Mlisana, K
Ping, LH
Athreya, GS
Treurnicht, FK
Keele, BF
Wood, N
Salazar-Gonzalez, JF
Bhattacharya, T
Chu, H
Hoffman, I
Galvin, S
Mapanje, C
Kazembe, P
Thebus, R
Fiscus, S
Hide, W
Cohen, MS
Karim, SA
Haynes, BF
Shaw, GM
Hahn, BH
Korber, BT
Swanstrom, R
Williamson, C
AF Abrahams, M. -R.
Anderson, J. A.
Giorgi, E. E.
Seoighe, C.
Mlisana, K.
Ping, L. -H.
Athreya, G. S.
Treurnicht, F. K.
Keele, B. F.
Wood, N.
Salazar-Gonzalez, J. F.
Bhattacharya, T.
Chu, H.
Hoffman, I.
Galvin, S.
Mapanje, C.
Kazembe, P.
Thebus, R.
Fiscus, S.
Hide, W.
Cohen, M. S.
Karim, S. Abdool
Haynes, B. F.
Shaw, G. M.
Hahn, B. H.
Korber, B. T.
Swanstrom, R.
Williamson, C.
CA CAPRISA 002 Acute Infection Study Team
Ctr Hiv-AIDS Vaccine Immunology Co
TI Quantitating the Multiplicity of Infection with Human Immunodeficiency
Virus Type 1 Subtype C Reveals a Non-Poisson Distribution of Transmitted
Variants
SO JOURNAL OF VIROLOGY
LA English
DT Article
ID PRIMARY HIV-INFECTION; RECOMBINATION DETECTION; DISEASE PROGRESSION;
GENETIC ALGORITHM; MALE CIRCUMCISION; MALE TRANSMISSION; IN-VIVO;
DIVERSITY; FEMALE; COHORT
AB Identifying the specific genetic characteristics of successfully transmitted variants may prove central to the development of effective vaccine and microbicide interventions. Although human immunodeficiency virus transmission is associated with a population bottleneck, the extent to which different factors influence the diversity of transmitted viruses is unclear. We estimate here the number of transmitted variants in 69 heterosexual men and women with primary subtype C infections. From 1,505 env sequences obtained using a single genome amplification approach we show that 78% of infections involved single variant transmission and 22% involved multiple variant transmissions (median of 3). We found evidence for mutations selected for cytotoxic-T-lymphocyte or antibody escape and a high prevalence of recombination in individuals infected with multiple variants representing another potential escape pathway in these individuals. In a combined analysis of 171 subtype B and C transmission events, we found that infection with more than one variant does not follow a Poisson distribution, indicating that transmission of individual virions cannot be seen as independent events, each occurring with low probability. While most transmissions resulted from a single infectious unit, multiple variant transmissions represent a significant fraction of transmission events, suggesting that there may be important mechanistic differences between these groups that are not yet understood.
C1 [Williamson, C.] Univ Cape Town, Fac Hlth Sci, Div Med Virol, Inst Infect Dis & Mol Med, ZA-7925 Cape Town, South Africa.
[Anderson, J. A.; Ping, L. -H.; Chu, H.; Hoffman, I.; Galvin, S.; Fiscus, S.; Cohen, M. S.; Swanstrom, R.] Univ N Carolina, Chapel Hill, NC USA.
[Giorgi, E. E.; Athreya, G. S.; Bhattacharya, T.; Korber, B. T.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Giorgi, E. E.] Univ Massachusetts, Amherst, MA 01003 USA.
[Mlisana, K.; Karim, S. Abdool] Univ KwaZulu Natal, Ctr AIDS Programme Res S Africa, Durban, South Africa.
[Keele, B. F.; Salazar-Gonzalez, J. F.; Shaw, G. M.; Hahn, B. H.] Univ Alabama Birmingham, Birmingham, AL USA.
[Bhattacharya, T.; Korber, B. T.] Santa Fe Inst, Santa Fe, NM 87501 USA.
[Mapanje, C.; Kazembe, P.] Kamuzu Cent Hosp, Lilongwe, Malawi.
[Hide, W.] Univ Western Cape, S African Bioinformat Inst, Cape Town, South Africa.
[Haynes, B. F.] Duke Univ, Med Ctr, Durham, NC USA.
RP Williamson, C (reprint author), Univ Cape Town, Fac Hlth Sci, Div Med Virol, Inst Infect Dis & Mol Med, ZA-7925 Cape Town, South Africa.
EM carolyn.williamson@uct.ac.za
RI Hide, Winston Hide/C-7217-2009; Chu, Haitao /J-7576-2012; Bhattacharya,
Tanmoy/J-8956-2013;
OI Hide, Winston Hide/0000-0002-8621-3271; Bhattacharya,
Tanmoy/0000-0002-1060-652X; Mlisana, Koleka/0000-0002-8436-3268; ,
Carolyn/0000-0003-0125-1226; Chu, Haitao/0000-0003-0932-598X; Korber,
Bette/0000-0002-2026-5757; Abdool Karim, Salim/0000-0002-4986-2133
FU National Institute of Allergy and Infectious Diseases; National
Institutes of Health; U. S. Department of Health and Human Services
[AI51794, DK49381]; National Research Foundation [67385]; South African
AIDS Vaccine Initiative; amFAR [106997-43]
FX This study was funded by the National Institute of Allergy and
Infectious Diseases, National Institutes of Health, and the U. S.
Department of Health and Human Services (AI51794, CAPRISA; DK49381
[M.S.C.], CHAVI), as well as by the National Research Foundation (no.
67385) ( South Africa), the South African AIDS Vaccine Initiative, and
amFAR grant 106997-43. We thank the clinical staff and participants from
the CAPRISA, CHAVI, and Malawi STI cohorts; Darren Marten for critical
comments; and Leslie Arney for assistance with the graphics. We also
thank the clinical staff from the CHAVI Lilongwe cohorts, including
Francis Martinson, Gift Kamanga, Happiness Kanyamula, and Deborah
Kamwendo, for their support.
NR 47
TC 204
Z9 206
U1 1
U2 14
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0022-538X
J9 J VIROL
JI J. Virol.
PD APR 15
PY 2009
VL 83
IS 8
BP 3556
EP 3567
DI 10.1128/JVI.02132-08
PG 12
WC Virology
SC Virology
GA 420ZI
UT WOS:000264327300014
PM 19193811
ER
PT J
AU Bilheux, JC
Alton, GD
AF Bilheux, J. -C.
Alton, G. D.
TI A fast-valve system for characterizing effusive-flow properties of
vapor-transport systems: RIB applications
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM
INTERACTIONS WITH MATERIALS AND ATOMS
LA English
DT Article
DE Effusive flow; Molecular flow; Vapor-transport system; Monte-Carlo
simulation; ISOL target; Radioactive Ion Beam
ID PRODUCTION TARGET APPLICATIONS; COMPOUND MATERIALS; ION-SOURCE;
FACILITIES; EFFICIENCY; MATRICES; RELEASE
AB Decay losses, associated with the times required for particles to diffuse from ISOL production targets and to effusively-flow to an ion source, must be reduced to as low as practically achievable levels in order to deliver useful beam intensities of short-lived isotopes for research at ISCL based Radioactive Ion Beam (RIB) facilities. We have developed a fast-valve system and complementary 3-D Monte-Carlo code which can be used separately or in combination to assess the effusive-flow properties of vapor-transport systems, independent of size, geometry and chemical properties of the transport species. In this report, we describe the fast valve and present time spectra and characteristic time data for noble gases flowing through serial- and parallel-coupled vapor-transport systems similar in geometry but longer than those used for RIB generation at the HRIBF with and without target coating matrices. (C) 2009 Published by Elsevier B.V.
C1 [Bilheux, J. -C.; Alton, G. D.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Alton, GD (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA.
EM gda@ornl.gov
RI Bilheux, Jean/A-2823-2016
OI Bilheux, Jean/0000-0003-2172-6487
FU US Department of Energy [DE-AC05-00OR22725]
FX The authors are indebted to students and staff members of the Advanced
Concept Research and Development Group, who through their diligent
efforts, contributed to the content of this paper through execution of
effusive-flow measurements used to validate the fast-valve system
described in this report. This work was supported by the US Department
of Energy under contract DE-AC05-00OR22725 with UT Battelle.
NR 19
TC 2
Z9 2
U1 1
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-583X
J9 NUCL INSTRUM METH B
JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms
PD APR 15
PY 2009
VL 267
IS 7
BP 1187
EP 1192
DI 10.1016/j.nimb.2008.12.019
PG 6
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Atomic, Molecular & Chemical; Physics, Nuclear
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 446XN
UT WOS:000266155000026
ER
PT J
AU Apollonio, M
Artamonov, A
Bagulya, A
Barr, G
Blondel, A
Bobisut, F
Bogomilov, M
Bonesini, M
Booth, C
Borghi, S
Bunyatov, S
Burguet-Castell, J
Catanesi, MG
Cervera-Villanueva, A
Chimenti, P
Coney, L
Di Capua, E
Dore, U
Dumarchez, J
Edgecock, R
Ellis, M
Ferri, F
Gastaldi, U
Giani, S
Giannini, G
Gibin, D
Gilardoni, S
Gorbunov, P
Gossling, C
Gomez-Cadenas, JJ
Grant, A
Graulich, JS
Gregoire, G
Grichine, V
Grossheim, A
Guglielmi, A
Howlett, L
Ivanchenko, A
Ivanchenko, V
Kayis-Topaksu, A
Kirsanov, M
Kolev, D
Krasnoperov, A
Martin-Albo, J
Meurer, C
Mezzetto, M
Mills, GB
Morone, MC
Novella, P
Orestano, D
Palladino, V
Panman, J
Papadopoulos, I
Pastore, F
Piperov, S
Polukhina, N
Popov, B
Prior, G
Radicioni, E
Schmitz, D
Schroeter, R
Skoro, G
Sorel, M
Tcherniaev, E
Temnikov, P
Tereschenko, V
Tonazzo, A
Tortora, L
Tsenov, R
Tsukerman, I
Vidal-Sitjes, G
Wiebusch, C
Zucchelli, P
AF Apollonio, M.
Artamonov, A.
Bagulya, A.
Barr, G.
Blondel, A.
Bobisut, F.
Bogomilov, M.
Bonesini, M.
Booth, C.
Borghi, S.
Bunyatov, S.
Burguet-Castell, J.
Catanesi, M. G.
Cervera-Villanueva, A.
Chimenti, P.
Coney, L.
Di Capua, E.
Dore, U.
Dumarchez, J.
Edgecock, R.
Ellis, M.
Ferri, F.
Gastaldi, U.
Giani, S.
Giannini, G.
Gibin, D.
Gilardoni, S.
Gorbunov, P.
Goessling, C.
Gomez-Cadenas, J. J.
Grant, A.
Graulich, J. S.
Gregoire, G.
Grichine, V.
Grossheim, A.
Guglielmi, A.
Howlett, L.
Ivanchenko, A.
Ivanchenko, V.
Kayis-Topaksu, A.
Kirsanov, M.
Kolev, D.
Krasnoperov, A.
Martin-Albo, J.
Meurer, C.
Mezzetto, M.
Mills, G. B.
Morone, M. C.
Novella, P.
Orestano, D.
Palladino, V.
Panman, J.
Papadopoulos, I.
Pastore, F.
Piperov, S.
Polukhina, N.
Popov, B.
Prior, G.
Radicioni, E.
Schmitz, D.
Schroeter, R.
Skoro, G.
Sorel, M.
Tcherniaev, E.
Temnikov, P.
Tereschenko, V.
Tonazzo, A.
Tortora, L.
Tsenov, R.
Tsukerman, I.
Vidal-Sitjes, G.
Wiebusch, C.
Zucchelli, P.
CA HARP Collaboration
TI Forward production of charged pions with incident pi(+/-) on nuclear
targets measured at the CERN PS
SO NUCLEAR PHYSICS A
LA English
DT Article
DE NUCLEAR REACTIONS Be,C,Al,Cu,Sn,Ta,Pb(pi(+), pi(+/-)), (pi(-), pi(+/-)),
E at 3, 5, 8, 12 GeV/c; Be(pi(+), pi(+/-)), (pi(-), pi(+/-)), E at 8.9
GeV/c; Al(pi(+), pi(+/-)), (pi(-), pi(+/-)), E at 12.9 GeV/c; measured
sigma (E, theta), pion production yields. Comparison with Monte Carlo
simulations
ID 450 GEV/C PROTONS; PRODUCTION CROSS-SECTION; LARGE-ANGLE PRODUCTION;
PARTICLE-PRODUCTION; POSITIVE PIONS; BERYLLIUM; HARP; DETECTOR; GEANT4
AB Measurements of the double-differential pi(+/-) production cross-section in the range of momentum 0.5 GeV/c <= p <= 8.0 GeV/c and angle 0.025 rad <= theta <= 0.25 rad in interactions of charged pions oil beryllium, carbon, aluminium, copper, tin, tantalum and lead are presented. These data represent the first experimental campaign to systematically measure forward pion hadroproduction.
The data were taken with the large acceptance HARP detector in the T9 beam line of the CERN PS. Incident particles, impinging on a 5% nuclear interaction length target, were identified by an elaborate system of beam detectors. The tracking and identification of the produced particles was performed using the forward spectrometer of the HARP detector. Results are obtained for the double-differential cross-sections d(2)sigma/dpd Omega mainly at four incident pion beam momenta (3 GeV/c, 5 GeV/c, 8 GeV/c and 12 GeV/c). The measurements are compared with the GEANT4 and MARS Monte Carlo simulation. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Bonesini, M.; Ferri, F.] Sez INFN Milano Bicocca, Milan, Italy.
[Catanesi, M. G.; Radicioni, E.] Sezione Ist Nazl Fis Nucl, Bari, Italy.
[Edgecock, R.; Ellis, M.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Goessling, C.] Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany.
[Bunyatov, S.; Krasnoperov, A.; Popov, B.; Tereschenko, V.] Joint Inst Nucl Res, Dubna, Russia.
[Di Capua, E.; Vidal-Sitjes, G.] Univ Ferrara, I-44100 Ferrara, Italy.
[Di Capua, E.; Vidal-Sitjes, G.] Ist Nazl Fis Nucl, Ferrara, Italy.
[Artamonov, A.; Giani, S.; Gilardoni, S.; Gorbunov, P.; Grant, A.; Grossheim, A.; Ivanchenko, A.; Ivanchenko, V.; Kayis-Topaksu, A.; Panman, J.; Papadopoulos, I.; Tcherniaev, E.; Wiebusch, C.; Zucchelli, P.] CERN, Geneva, Switzerland.
[Blondel, A.; Morone, M. C.; Prior, G.; Schroeter, R.] Univ Geneva, Sect Phys, CH-1211 Geneva 4, Switzerland.
[Meurer, C.] Forschungszentrum, Inst Phys, Karlsruhe, Germany.
[Gastaldi, U.] Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy.
[Graulich, J. S.; Gregoire, G.] UCL, Inst Phys Nucl, Louvain, Belgium.
[Bagulya, A.; Kirsanov, M.] Russian Acad Sci, Inst Nucl Res, Moscow, Russia.
[Grichine, V.; Polukhina, N.] Russian Acad Sci, PN Lebedev Phys Inst FIAN, Moscow, Russia.
[Palladino, V.] Univ Naples Federico II, Naples, Italy.
[Palladino, V.] Sezione Ist Nazl Fis Nucl, Naples, Italy.
[Barr, G.; Borghi, S.] Univ Oxford, Nucl & Astrophys Lab, Oxford OX1 2JD, England.
[Bobisut, F.; Gibin, D.; Guglielmi, A.; Mezzetto, M.] Sezione Ist Nazl Fis Nucl, Padua, Italy.
[Dumarchez, J.] Univ Paris 06, LPNHE, Paris, France.
[Dumarchez, J.] Univ Paris 07, LPNHE, Paris, France.
[Dore, U.] Univ Roma La Sapienza, Rome, Italy.
[Dore, U.] Sez INFN Roma 1, Rome, Italy.
[Howlett, L.; Orestano, D.; Pastore, F.; Tonazzo, A.; Tortora, L.] Sez INFN Roma III, Rome, Italy.
[Booth, C.; Skoro, G.] Univ Sheffield, Dept Phys, Sheffield S10 2TN, S Yorkshire, England.
[Bogomilov, M.; Kolev, D.; Piperov, S.; Tsukerman, I.] Sofia Univ St Kliment Ohridski, Fac Phys, Sofia, Bulgaria.
[Temnikov, P.] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria.
[Apollonio, M.; Chimenti, P.; Giannini, G.] Univ Trieste, Trieste, Italy.
[Apollonio, M.; Chimenti, P.; Giannini, G.] Ist Nazl Fis Nucl, Trieste, Italy.
[Burguet-Castell, J.; Cervera-Villanueva, A.; Gomez-Cadenas, J. J.; Martin-Albo, J.; Novella, P.; Sorel, M.] CSIC, IFIC, Inst Fis Corpuscular, Madrid, Spain.
[Burguet-Castell, J.; Cervera-Villanueva, A.; Gomez-Cadenas, J. J.; Novella, P.; Sorel, M.] Univ Valencia, E-46003 Valencia, Spain.
[Mills, G. B.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Coney, L.; Schmitz, D.] Columbia Univ, New York, NY USA.
[Bobisut, F.; Gibin, D.] Univ Padua, Padua, Italy.
[Mills, G. B.; Orestano, D.; Pastore, F.] Univ Rome III, Rome, Italy.
RP Bonesini, M (reprint author), Sez INFN Milano Bicocca, Milan, Italy.
EM maurizio.bonesini@mib.infn.it
RI Graulich, Jean-Sebastien/B-4806-2009; Skoro, Goran/F-3642-2010;
Chimenti, Pietro/F-9898-2012; Wiebusch, Christopher/G-6490-2012; Prior,
Gersende/I-8191-2013; Bagulya, Alexander/D-4273-2014; Novella,
Pau/K-2845-2014; Gomez Cadenas, Juan Jose/L-2003-2014; Temnikov,
Petar/L-6999-2016; Skoro, Goran/P-1229-2014; Grichine,
Vladimir/M-8526-2015; Polukhina, Natalia/E-1610-2014; Tcherniaev,
Evgueni/G-3453-2016; Morone, Maria Cristina/P-4407-2016; Booth,
Christopher/B-5263-2016;
OI Chimenti, Pietro/0000-0002-9755-5066; Wiebusch,
Christopher/0000-0002-6418-3008; Novella, Pau/0000-0002-0923-3172; Gomez
Cadenas, Juan Jose/0000-0002-8224-7714; Temnikov,
Petar/0000-0002-9559-3384; Skoro, Goran/0000-0001-7745-9045; Tcherniaev,
Evgueni/0000-0002-3685-0635; Morone, Maria Cristina/0000-0002-0200-0632;
Bonesini, Maurizio/0000-0001-5119-1896; Prior,
Gersende/0000-0002-6058-1420; Booth, Christopher/0000-0002-6051-2847;
Sorel, Michel/0000-0003-2141-9508; Martin-Albo,
Justo/0000-0002-7318-1469; Schmitz, David/0000-0003-2165-7389
FU Institut Interuniversitaire des Sciences Nucleaires and the
Interuniversitair Instituut voor Kernwetenschappen (Belgium), Ministerio
de Educacion y Ciencia [FPA2003-06921-c02-02]; Generalitat Valenciana
[GV00-054-1]; CERN (Geneva, Switzerland); German Bundesministerium fur
Bildung und Forschung (Germany); Istituto Nazionale di Fisica Nucleare
(Italy); INR RAS (Moscow); Russian Foundation for Basic Research
[08-02-00018]; Particle Physics and Astronomy Research Council (UK);
Swiss National Science Foundation
FX We gratefully acknowledge the help and support of the PS beam staff and
of the numerous technical Collaborators who contributed to the detector
design, construction, commissioning and operation. In particular, we
would like to thank G. Barichello, R. Brocard, K. Burin, V. Carassiti,
F. Chignoli, D. Conventi, G. Decreuse, A Delattre, C. Detraz, A.
Domeniconi, M. Dwuznik, F. Evangelisti, B. Friend, A. Iaciofano, I.
Krasin, D. Lacroix, J.-C. Legrand, M. Lobello, A Lollo, J. Loquet, F.
Marinilli, R. Mazza, J. Mulon, L. Musa, R. Nicholson, A. Pepato, P.
Petev, X. Pons, I. Rusinov, M. Scandurra, E. Usenko, R. van der Vlugt,
for their support in the construction of the detector and P. Dini for
his contribution to Monte Carlo production. The Collaboration
acknowledges the major contributions and advice of M. Baldo-Ceolin, L.
Linssen, M.T. Muciaccia and A. Pullia during the construction of the
experiment. The Collaboration is indebted to V. Ableev, F. Bergsma, P.
Binko, E. Boter, M. Calvi, C. Cavion, M.Chizov, A. Chukanov, A. DeSanto,
A. DeMin, M. Doucel, D. Dullmann, V. Ermilova, W. Flegel, Y. Hayato, A.
Ichikawa, O. Klimov, T Kobayashi, D. Kustov, M. Laveder, M. Mass, H.
Meinhard, A. Menegolli, I Nakaya, K. Nishikawa, M. Paganoni, F. Paleari,
M. Pasquali, M. Placentino, V. Serdiouk, S. Simone, P.J. Soler, S.
Troquereau, S. Ueda, A. Valassi and R. Veenhof for their contributions
to the experiment.; We acknowledge the contributions of V. Ammosov. G.
Chelkov, D. Dedovich, F. Dydak, M. Gostkin, A. Guskov, D. Khartchenko,
V. Koreshev, Z. Kroumchtein, I. Nefedov, A. Semak, J. Wotschack, V.
Zaets and A. Zhemchugov to the work described in this paper.; The
experiment was made possible by grants from the Institut
Interuniversitaire des Sciences Nucleaires and the Interuniversitair
Instituut voor Kernwetenschappen (Belgium), Ministerio de Educacion y
Ciencia, Grant FPA2003-06921-c02-02 and Generalitat Valenciana, grant
GV00-054-1, CERN (Geneva, Switzerland), the German Bundesministerium fur
Bildung und Forschung (Germany), the Istituto Nazionale di Fisica
Nucleare (Italy), INR RAS (Moscow), the Russian Foundation for Basic
Research (grant 08-02-00018), the Particle Physics and Astronomy
Research Council (UK) and the Swiss National Science Foundation, in the
framework of the SCOPES programme. We gratefully acknowledge their
support.
NR 39
TC 11
Z9 11
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
EI 1873-1554
J9 NUCL PHYS A
JI Nucl. Phys. A
PD APR 15
PY 2009
VL 821
BP 118
EP 192
DI 10.1016/j.nuclphysa.2009.01.080
PG 75
WC Physics, Nuclear
SC Physics
GA 434KU
UT WOS:000265274400008
ER
PT J
AU MacLaughlin, DE
Ohta, Y
Machida, Y
Nakatsuji, S
Luke, GM
Ishida, K
Heffner, RH
Shu, L
Bernal, OO
AF MacLaughlin, D. E.
Ohta, Y.
Machida, Y.
Nakatsuji, S.
Luke, G. M.
Ishida, K.
Heffner, R. H.
Shu, Lei
Bernal, O. O.
TI Weak quasistatic magnetism in the frustrated Kondo lattice Pr2Ir2O7
SO PHYSICA B-CONDENSED MATTER
LA English
DT Article; Proceedings Paper
CT 11th International Conference on Muon Spin Rotation, Relaxation and
Resonance
CY JUL 21-25, 2008
CL Tsukuba, JAPAN
SP Japan World Exposit, Commemorat Organizat
DE Frustrated magnetism; Pyrochlore lattice; Muon spin relaxation; Enhanced
nuclear magnetism; Pr2Ir2O7
ID ENHANCED NUCLEAR MAGNETISM; MUON-SPIN RELAXATION; ELECTRIC-FIELD; MU(+)
AB Muon spin relaxation experiments have been performed in the pyrochlore iridate Pr2Ir2O7 for temperatures in the range 0.025-250 K. Kubo-Toyabe relaxation functions are observed up to greater than or similar to 200 K, indicating static magnetism over this temperature range. The T -> 0 static muon spin relaxation rate Delta(0) approximate to 8 mu s(-1) implies a weak quasistatic moment (similar to 0.1 mu(B)). The temperature dependence of A is highly nonmean-field-like, decreasing smoothly by orders of magnitude but remaining nonzero for T < T-f. The data rule out ordering of the full Pr3+ CEF ground-state moment (3.0 mu(B)) down to 0.025 K. The weak static magnetism is most likely due to hyperfine-enhanced Pr-141 nuclear magnetism. The dynamic relaxation rate A increases markedly below similar to 20 K probably due to slowing down of spin fluctuations in the spin-liquid state. At low temperatures lambda is strong and temperature-independent, indicative of a high density of low-lying spin excitations as is common in frustrated antiferromagnets. (C) 2008 Elsevier B.V. All rights reserved.
C1 [MacLaughlin, D. E.; Shu, Lei] Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA.
[Ohta, Y.; Machida, Y.; Nakatsuji, S.] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan.
[Luke, G. M.] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada.
[Ishida, K.] Kyoto Univ, Grad Sch Sci, Dept Phys, Kyoto 6068502, Japan.
[Heffner, R. H.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Bernal, O. O.] Calif State Univ Los Angeles, Dept Phys & Astron, Los Angeles, CA 90032 USA.
RP MacLaughlin, DE (reprint author), Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA.
EM macl@physics.ucr.edu
RI Shu, Lei/E-7524-2012; Luke, Graeme/A-9094-2010;
OI Luke, Graeme/0000-0003-4762-1173
NR 17
TC 16
Z9 16
U1 1
U2 33
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0921-4526
J9 PHYSICA B
JI Physica B
PD APR 15
PY 2009
VL 404
IS 5-7
BP 667
EP 670
DI 10.1016/j.physb.2008.11.167
PG 4
WC Physics, Condensed Matter
SC Physics
GA 437ES
UT WOS:000265469800026
ER
PT J
AU Ohishi, K
Heffner, RH
Spehling, J
MacDougall, GJ
Ito, TU
Higemoto, W
Amato, A
Andreica, D
Nieuwenhuys, G
Klauss, HH
Luke, GM
Thompson, JD
Bianchi, AD
Fisk, Z
AF Ohishi, K.
Heffner, R. H.
Spehling, J.
MacDougall, G. J.
Ito, T. U.
Higemoto, W.
Amato, A.
Andreica, D.
Nieuwenhuys, G.
Klauss, H. H.
Luke, G. M.
Thompson, J. D.
Bianchi, A. D.
Fisk, Z.
TI Magnetism and superconductivity in heavy fermion superconductor
CeCo(In0.97Cd0.03)(5)
SO PHYSICA B-CONDENSED MATTER
LA English
DT Article; Proceedings Paper
CT 11th International Conference on Muon Spin Rotation, Relaxation and
Resonance
CY JUL 21-25, 2008
CL Tsukuba, JAPAN
SP Japan World Exposit, Commemorat Organizat
DE Heavy fermion; CeCo(In,Cd)(5); Muon spin relaxation (mu SR);
Superconductivity
ID CECOIN5
AB Zero field (ZF) and transverse field (TF) muon spin relaxation and rotation (mu SR) experiments have been carried out in the Cd-doped heavy fermion superconductor CeCoIn5 to investigate its superconducting state. The ZF-mu SR results in CeCo(In0.97Cd0.03)(5) revealed that no spontaneous magnetic field was induced below its superconducting transition temperature (T-c), indicating no evidence for time reversal symmetry breaking. The muon Knight shifts obtained from TF-mu SR measurements decrease significantly below Tc, consistent with a spin-singlet state as in the parent compound CeCoIn5, which is a cl-wave superconductor. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Ohishi, K.; Heffner, R. H.; Ito, T. U.; Higemoto, W.] Japan Atom Energy Agcy, Adv Sci Res Ctr, Ibaraki 3191195, Japan.
[Heffner, R. H.; Thompson, J. D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Spehling, J.; Klauss, H. H.] Tech Univ Dresden, Inst Phys Solids, Dresden, Germany.
[MacDougall, G. J.; Luke, G. M.] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada.
[Ito, T. U.] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan.
[Amato, A.; Andreica, D.; Nieuwenhuys, G.] Paul Scherrer Inst, Lab Muon Spin Spect, Villigen, Switzerland.
[Andreica, D.] Univ Babes Bolyai, Fac Phys, Cluj Napoca 400084, Romania.
[Bianchi, A. D.; Fisk, Z.] Univ Calif Irvine, Irvine, CA 92697 USA.
RP Ohishi, K (reprint author), RIKEN, Inst Phys & Chem Res, Adv Meson Sci Lab, 2-1 Hirosawa, Wako, Saitama 3510198, Japan.
EM kazuki.ohishi@riken.jp
RI Ohishi, Kazuki/E-9592-2010; Klauss, Hans-Henning/G-4743-2010; Luke,
Graeme/A-9094-2010; Amato, Alex/H-7674-2013; Bianchi,
Andrea/E-9779-2010;
OI Ohishi, Kazuki/0000-0003-1494-6502; Amato, Alex/0000-0001-9963-7498;
Bianchi, Andrea/0000-0001-9340-6971; Ito, Takashi/0000-0003-1971-4313;
Luke, Graeme/0000-0003-4762-1173
NR 13
TC 0
Z9 0
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0921-4526
J9 PHYSICA B
JI Physica B
PD APR 15
PY 2009
VL 404
IS 5-7
BP 754
EP 756
DI 10.1016/j.physb.2008.11.181
PG 3
WC Physics, Condensed Matter
SC Physics
GA 437ES
UT WOS:000265469800051
ER
PT J
AU Aoki, Y
Higemoto, W
Tsunashima, Y
Yonezawa, Y
Satoh, KH
Koda, A
Ito, TU
Ohishi, K
Heffner, RH
Kikuchi, D
Sato, H
AF Aoki, Y.
Higemoto, W.
Tsunashima, Y.
Yonezawa, Y.
Satoh, K. H.
Koda, A.
Ito, T. U.
Ohishi, K.
Heffner, R. H.
Kikuchi, D.
Sato, H.
TI Weak ferromagnetic ordering in the anomalous field-insensitive
heavy-fermion state in SMOs4Sb12
SO PHYSICA B-CONDENSED MATTER
LA English
DT Article; Proceedings Paper
CT 11th International Conference on Muon Spin Rotation, Relaxation and
Resonance
CY JUL 21-25, 2008
CL Tsukuba, JAPAN
SP Japan World Exposit, Commemorat Organizat
DE Heavy fermion; SmOs4Sb12; Skutterudite; Muon spin relaxation (mu SR);
Weak ferromagnetism
ID FILLED SKUTTERUDITE SMOS4SB12; MU-SR; POINT
AB Zero field (ZF) and transverse field (TF) muon spin relaxation and rotation (mu SR) study has been carried out in filled-skutterudite SmOs4Sb12 in order to investigate the magnetically robust heavy-fermion (HF) state and the weak ferromagnetic anomaly appearing below similar to 2.5 K. A large-amplitude oscillating signal appears in the ZF-mu SR spectra at low temperatures, confirming that the weak ferromagnetic anomaly is an intrinsic bulk property. Two components with the fraction ratio of similar to 2:1 exist both in the ZF-mu SR spectra of the ferromagnetically ordered state and the TF-mu SR FFT spectra in applied fields along the < 001 > direction. This observation can be explained consistently based on the most probable muon stopping site indicated from the value of the static nuclear dipolar width in Kubo-Toyabe function in the high-temperature ZF-mu SR spectra. Analysis reveals that the spontaneous magnetic moment M, ties along the < 001 > direction and the size of M-s is largely suppressed, indicating that the weak ferromagnetic moment is carried by itinerant heavy quasiparticles. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Aoki, Y.; Tsunashima, Y.; Yonezawa, Y.; Kikuchi, D.; Sato, H.] Tokyo Metropolitan Univ, Dept Phys, Tokyo 1920397, Japan.
[Higemoto, W.; Ito, T. U.; Ohishi, K.; Heffner, R. H.] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan.
[Satoh, K. H.; Koda, A.] High Energy Accelerator Res Org, Muon Sci Lab, Tsukuba, Ibaraki 3050801, Japan.
[Heffner, R. H.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Aoki, Y (reprint author), Tokyo Metropolitan Univ, Dept Phys, Tokyo 1920397, Japan.
EM aoki@phys.metro-u.ac.jp
RI Ohishi, Kazuki/E-9592-2010; Aoki, Yuji/E-5494-2015;
OI Ohishi, Kazuki/0000-0003-1494-6502; Aoki, Yuji/0000-0002-0957-3396; Ito,
Takashi/0000-0003-1971-4313
NR 20
TC 4
Z9 4
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0921-4526
J9 PHYSICA B
JI Physica B
PD APR 15
PY 2009
VL 404
IS 5-7
BP 757
EP 760
DI 10.1016/j.physb.2008.11.180
PG 4
WC Physics, Condensed Matter
SC Physics
GA 437ES
UT WOS:000265469800052
ER
PT J
AU Ito, TU
Higemoto, W
Ohishi, K
Heffner, RH
Nishida, N
Satoh, K
Sugawara, H
Aoki, Y
Kikuchi, D
Sato, H
AF Ito, Takashi U.
Higemoto, Wataru
Ohishi, Kazuki
Heffner, Robert H.
Nishida, Nobuhiko
Satoh, Kazuhiko
Sugawara, Hitoshi
Aoki, Yuji
Kikuchi, Daisuke
Sato, Hideyuki
TI Possible low-energy excitations of multipoles in SmRu4P12 probed by muon
spin relaxation
SO PHYSICA B-CONDENSED MATTER
LA English
DT Article; Proceedings Paper
CT 11th International Conference on Muon Spin Rotation, Relaxation and
Resonance
CY JUL 21-25, 2008
CL Tsukuba, JAPAN
SP Japan World Exposit, Commemorat Organizat
DE Filled skutterudite; Multipolar ordering; Low-energy excitations; Muon
spin relaxation (mu SR)
ID MAGNETIC-PROPERTIES
AB We report on detailed longitudinal field (LF) muon spin relaxation studies in SmRu4P12 in order to characterize magnetic fluctuations in a magnetically ordered state below T-MI = 16.5 K. The magnitude and fluctuation rate of the fluctuating field are derived as functions of temperature from LF dependence of the longitudinal relaxation rate. Possible low-energy excitations of magnetic multipoles are discussed. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Ito, Takashi U.; Higemoto, Wataru; Ohishi, Kazuki; Heffner, Robert H.] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan.
[Ito, Takashi U.; Nishida, Nobuhiko] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan.
[Heffner, Robert H.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Satoh, Kazuhiko] Saitama Univ, Grad Sch Sci & Engn, Saitama 3388570, Japan.
[Sugawara, Hitoshi] Univ Tokushima, Fac Integrated Arts & Sci, Tokushima 7708502, Japan.
[Aoki, Yuji; Kikuchi, Daisuke; Sato, Hideyuki] Tokyo Metropolitan Univ, Dept Phys, Tokyo 1920397, Japan.
RP Ito, TU (reprint author), Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan.
EM ito.takashi15@jaea.go.jp
RI Ohishi, Kazuki/E-9592-2010; Aoki, Yuji/E-5494-2015
OI Ito, Takashi/0000-0003-1971-4313; Ohishi, Kazuki/0000-0003-1494-6502;
Aoki, Yuji/0000-0002-0957-3396
NR 17
TC 1
Z9 1
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0921-4526
J9 PHYSICA B
JI Physica B
PD APR 15
PY 2009
VL 404
IS 5-7
BP 761
EP 764
DI 10.1016/j.physb.2008.11.179
PG 4
WC Physics, Condensed Matter
SC Physics
GA 437ES
UT WOS:000265469800053
ER
PT J
AU Song, Q
Chow, KH
Miller, RI
Fan, I
Hossain, MD
Kiefl, RF
Kreitzman, SR
Levy, CDP
Parolin, TJ
Pearson, MR
Salman, Z
Saadaoui, H
Smadella, M
Wang, D
Yu, KM
Liu, X
Furdyna, JK
MacFarlane, WA
AF Song, Q.
Chow, K. H.
Miller, R. I.
Fan, I.
Hossain, M. D.
Kiefl, R. F.
Kreitzman, S. R.
Levy, C. D. P.
Parolin, T. J.
Pearson, M. R.
Salman, Z.
Saadaoui, H.
Smadella, M.
Wang, D.
Yu, K. M.
Liu, X.
Furdyna, J. K.
MacFarlane, W. A.
TI Beta-detected NMR study of the local magnetic field in epitaxial GaAs:Mn
SO PHYSICA B-CONDENSED MATTER
LA English
DT Article; Proceedings Paper
CT 11th International Conference on Muon Spin Rotation, Relaxation and
Resonance
CY JUL 21-25, 2008
CL Tsukuba, JAPAN
SP Japan World Exposit, Commemorat Organizat
DE GaAs:Mn; Magnetism; Thin films; Low energy muon; Dilute ferromagnetic
semiconductor
ID SEMICONDUCTORS; SPINTRONICS; CRYSTALS
AB A low energy beam of spin polarized (8)Li(+) has been employed to study the magnetic field distribution in an epitaxial thin film of 5.4% Mn doped GaAs(180 nm) on a (100) GaAs substrate via beta-detected NMR. The spectrum is a strong function of the implantation energy in the range 28-3 keV. In the magnetic layer, there is no indication of a missing fraction, and even more remarkable, there is a broad negatively shifted resonance. The spin lattice relaxation rate is, however, much faster in the Mn doped layer than in the substrate. A sharp peak characteristic of nonmagnetic GaAs is observed down to the lowest implantation energy, for which none of the Li should reach the substrate. This unexpected depth dependence is discussed. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Song, Q.; Hossain, M. D.; Kiefl, R. F.; Saadaoui, H.; Smadella, M.; Wang, D.] Univ British Columbia, Dept Phys, Vancouver, BC V6T 1Z1, Canada.
[Chow, K. H.; Fan, I.] Univ Alberta, Dept Phys, Edmonton, AB T6G 2G7, Canada.
[Miller, R. I.; Kreitzman, S. R.; Levy, C. D. P.; Pearson, M. R.; Salman, Z.] TRIUMF, Vancouver, BC V6T 2A3, Canada.
[Parolin, T. J.] Univ British Columbia, Dept Chem, Vancouver, BC V6T 1Z1, Canada.
[Kiefl, R. F.] Canadian Inst Adv Res, Vancouver, BC, Canada.
[Yu, K. M.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Liu, X.; Furdyna, J. K.; MacFarlane, W. A.] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
RP Song, Q (reprint author), Univ British Columbia, Dept Phys, 6224 Agr Rd, Vancouver, BC V6T 1Z1, Canada.
EM susan@phas.ubc.ca
RI Salman, Zaher/A-5696-2008; Yu, Kin Man/J-1399-2012; Fan,
Isaac/L-5784-2016; Saadaoui, Hassan/F-4321-2016
OI Salman, Zaher/0000-0002-3431-8135; Yu, Kin Man/0000-0003-1350-9642;
Saadaoui, Hassan/0000-0001-5526-3615
NR 22
TC 3
Z9 3
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0921-4526
J9 PHYSICA B
JI Physica B
PD APR 15
PY 2009
VL 404
IS 5-7
BP 892
EP 895
DI 10.1016/j.physb.2008.11.143
PG 4
WC Physics, Condensed Matter
SC Physics
GA 437ES
UT WOS:000265469800088
ER
PT J
AU Arseneau, DJ
Fleming, DG
Sukhorukov, O
Brewer, JH
Garrett, BC
Truhlar, DG
AF Arseneau, Donald J.
Fleming, Donald G.
Sukhorukov, Oleksandr
Brewer, Jess H.
Garrett, Bruce C.
Truhlar, Donald G.
TI The muonic He atom and a preliminary study of the He-4 mu + H-2 reaction
SO PHYSICA B-CONDENSED MATTER
LA English
DT Article; Proceedings Paper
CT 11th International Conference on Muon Spin Rotation, Relaxation and
Resonance
CY JUL 21-25, 2008
CL Tsukuba, JAPAN
SP Japan World Exposit, Commemorat Organizat
DE He mu atom; Heavy H-atom; Hydrogen; Reaction rate; Kinetic isotope
effects; Variational TST
ID HELIUM ATOM; INTERVAL
AB The muonic atom He-4 mu has the composition alpha(++)mu(-)e(-), and is formed by stopping negative muons in He doped with a small amount of NH3 (or Xe). It may be regarded as a unique heavy H-atom isotope with a mass of 4.1 amu. As such, the study of its chemical reaction rates and comparison with those of the well-known light Mu atom (0.113 amu) allows unprecedented tests of kinetic isotope effects over a range of 36 in mass. As a first example, and one which is of most fundamental interest, we have begun kinetics studies of the He mu + H-2 -> He mu H + H reaction in the gas phase. The first measurements, at 295 K, give a rate constant of k(He mu) = 4.1 +/- 0.7 X 10(-16) cm(3) molec(-1) s(-1). in comparison, variational transition state calculations give a value of 2.46 x 10(-6) cm(3) molec(-1) s-1, somewhat below the measurement, despite the large error bar, raising the possibility that the calculations, on an essentially exact potential energy surface, have underestimated the amount of quantum tunneling involved, even for this heavy H-atom isotope. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Arseneau, Donald J.] TRIUMF, CMMS, Vancouver, BC V6T 2A3, Canada.
[Fleming, Donald G.; Sukhorukov, Oleksandr; Brewer, Jess H.] Univ British Columbia, TRIUMF, Vancouver, BC V6T 1Z1, Canada.
[Fleming, Donald G.; Sukhorukov, Oleksandr] Univ British Columbia, Dept Chem, Vancouver, BC V6T 1Z1, Canada.
[Brewer, Jess H.] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada.
[Garrett, Bruce C.] Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA.
[Truhlar, Donald G.] Univ Minnesota, Dept Chem, Minneapolis, MN 55455 USA.
[Truhlar, Donald G.] Univ Minnesota, Inst Supercomp, Minneapolis, MN 55455 USA.
RP Arseneau, DJ (reprint author), TRIUMF, CMMS, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada.
EM asnd@triumf.ca
RI Garrett, Bruce/F-8516-2011; Truhlar, Donald/G-7076-2015
OI Truhlar, Donald/0000-0002-7742-7294
NR 12
TC 9
Z9 9
U1 1
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0921-4526
J9 PHYSICA B
JI Physica B
PD APR 15
PY 2009
VL 404
IS 5-7
BP 946
EP 949
DI 10.1016/j.physb.2008.11.130
PG 4
WC Physics, Condensed Matter
SC Physics
GA 437ES
UT WOS:000265469800104
ER
PT J
AU Nagamine, K
Miyadera, H
Jason, A
Seki, R
AF Nagamine, K.
Miyadera, H.
Jason, A.
Seki, R.
TI Compact muon source with electron accelerator for a mobile mu SR
facility
SO PHYSICA B-CONDENSED MATTER
LA English
DT Article; Proceedings Paper
CT 11th International Conference on Muon Spin Rotation, Relaxation and
Resonance
CY JUL 21-25, 2008
CL Tsukuba, JAPAN
SP Japan World Exposit, Commemorat Organizat
DE Microtron; FFAG; RFQ; Micro-beam
ID PHOTOPRODUCTION; BREMSSTRAHLUNG
AB In order to increase accessibility to the mu SR spectroscopy for people in various fields of science and engineering, a conceptual design study was made to realize a compact and inexpensive muon source by using 300 MeV electron microtron and a large-acceptance muon-capture. Advanced radiography imaging with muon spin probes will become possible for bio-medical studies, inspection of re-enforced architectures, etc. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Nagamine, K.] Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA.
[Nagamine, K.] KEK, IMSS, Muon Sci Lab, Tsukuba, Ibaraki 3050801, Japan.
[Nagamine, K.] RIKEN, Atom Phys Lab, Wako, Saitama 3510191, Japan.
[Miyadera, H.; Jason, A.] Los Alamos Natl Lab, AOT ABS, Los Alamos, NM 87545 USA.
[Seki, R.] Calif State Univ Northridge, Dept Phys, Northridge, CA 91330 USA.
RP Nagamine, K (reprint author), Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA.
EM kanetada.nagamine@ucr.edu
NR 14
TC 1
Z9 1
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0921-4526
J9 PHYSICA B
JI Physica B
PD APR 15
PY 2009
VL 404
IS 5-7
BP 1020
EP 1023
DI 10.1016/j.physb.2008.11.231
PG 4
WC Physics, Condensed Matter
SC Physics
GA 437ES
UT WOS:000265469800124
ER
PT J
AU Fiawoo, MF
Bonnot, AM
Jourdain, V
Michel, T
Picher, M
Arenal, R
Thibault-Penisson, J
Loiseau, A
AF Fiawoo, M. -F.
Bonnot, A. -M.
Jourdain, V.
Michel, T.
Picher, M.
Arenal, R.
Thibault-Penisson, J.
Loiseau, A.
TI Substrate preparation techniques for direct investigation by TEM of
single wall carbon nanotubes grown by chemical vapor deposition
SO SURFACE SCIENCE
LA English
DT Article
DE Carbon nanotubes; Growth; Membranes; TEM preparation; CVD; Ion
bombardment; Reactive ion etching
ID TRANSMISSION ELECTRON-MICROSCOPY; CATALYTIC NANOPARTICLES; SPECIMEN
PREPARATION; SAMPLE PREPARATION; NUCLEATION; DIFFRACTION; NANOFIBERS;
FILMS
AB We have investigated and evaluated different TEM sample preparation techniques for studying carbon single-walled nanotube (C-SWNT) nucleation and growth, issued from CVD processes when the catalyst is supported on a substrate. This kind of study requires means to observe individual and isolated tubes. It implies using synthesis conditions able to produce only a low density of tubes and to thin the substrate to electron transparency, to observe the nanotubes and the catalytic particles from which they have grown in their native state. We have tested two approaches, depending if the substrate is thinned after or before the synthesis. The low tube density requirement led us to exclude all the techniques where the substrate is thinned to electron transparency after the synthesis. We have shown, that, with this last approach, all TEM preparation techniques dramatically suffer from a lack of control of thin areas with respect to the location of the tubes, which is unknown. However we have demonstrated that the suitable approach is to perform synthesis directly on transparent substrates presenting several holes. We have tested the capabilities and the potentialities of these supports for studying the size distribution and composition of the catalytic particles, the nucleation mode, the diameter and helicity of the tubes. These results are very promising and represent an important step for performing specific nanoscale TEM analyses necessary for the study of the growth mechanism of nanotubes on substrates. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Fiawoo, M. -F.; Arenal, R.; Loiseau, A.] Off Natl Etud & Rech Aerosp, CNRS, UMR 104, Lab Etud Microstruct, F-92322 Chatillon, France.
[Bonnot, A. -M.] UJF, CNRS, Inst Louis Neel, F-38042 Grenoble 9, France.
[Jourdain, V.; Michel, T.; Picher, M.] Univ Montpellier 2, CNRS, UMR5587, Lab Colloides Verres & Nanomat, F-34095 Montpellier 5, France.
[Arenal, R.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Thibault-Penisson, J.] Univ Aix Marseille 3, CNRS, Fac Sci & Tech St Jerome, Inst Mat Microelect Nanosci Provence,UMR6242, F-13397 Marseille, France.
RP Loiseau, A (reprint author), Off Natl Etud & Rech Aerosp, CNRS, UMR 104, Lab Etud Microstruct, 29 Ave Div Leclerc, F-92322 Chatillon, France.
EM loiseau@onera.fr
RI Arenal, Raul/D-2065-2009
OI Arenal, Raul/0000-0002-2071-9093
NR 35
TC 4
Z9 4
U1 1
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-6028
J9 SURF SCI
JI Surf. Sci.
PD APR 15
PY 2009
VL 603
IS 8
BP 1115
EP 1120
DI 10.1016/j.susc.2009.02.029
PG 6
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 440WL
UT WOS:000265730300008
ER
PT J
AU Kang, XH
Wang, J
Tang, ZW
Wu, H
Lin, YH
AF Kang, Xinhuang
Wang, Jun
Tang, Zhiwen
Wu, Hong
Lin, Yuehe
TI Direct electrochemistry and electrocatalysis of horseradish peroxidase
immobilized in hybrid organic-inorganic film of chitosan/sol-gel/carbon
nanotubes
SO TALANTA
LA English
DT Article
DE Direct electrochemistry; Horseradish peroxidase; Multi-walled carbon
nanotubes; Sol-gel
ID DIRECT ELECTRON-TRANSFER; GLASSY-CARBON ELECTRODE; GOLD NANOPARTICLE
NANOCOMPOSITE; GLUCOSE-OXIDASE; COMPOSITE FILM; CYTOCHROME-C;
HEME-PROTEINS; BIOSENSOR; ENZYMES; HYDROGEL
AB A hybrid organic-inorganic nanocomposite film of chitosan/sol-gel/multi-walled carbon nanotubes was constructed for the immobilization of horseradish peroxidase (HRP). This film was characterized by scanning electron microscopy. Direct electron transfer (DET) and bioelectrocatalysis of HRP incorporated into the composite film were investigated. The results indicate that the film can provide a favorable microenvironment for HRP to perform DET on the surface of glassy carbon electrodes with a pair of quasi-reversible redox waves and to retain its bioelectrocatalytic activity toward H(2)O(2). (C) 2008 Elsevier B.V. All rights reserved.
C1 [Kang, Xinhuang; Wang, Jun; Tang, Zhiwen; Wu, Hong; Lin, Yuehe] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Kang, Xinhuang] Guangdong Ocean Univ, Coll Sci, Zhanjiang 524088, Peoples R China.
RP Lin, YH (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd, Richland, WA 99352 USA.
EM Yuehe.lin@pnl.gov
RI Lin, Yuehe/D-9762-2011
OI Lin, Yuehe/0000-0003-3791-7587
FU LDRD program at Pacific Northwest National Laboratory (PNNL); DOE's
Office of Biological and Environmental Research; U.S. Department of
Energy by Battelle [DE-AC05-76RL01830]
FX The work was supported by a LDRD program at Pacific Northwest National
Laboratory (PNNL). The research described in this paper was performed at
the Environmental Molecular Sciences Laboratory, a national scientific
user facility sponsored by the DOE's Office of Biological and
Environmental Research and located at PNNL. PNNL is operated for the
U.S. Department of Energy by Battelle under Contract DE-AC05-76RL01830.
X. Kang gratefully acknowledges the award of a PNNL fellowship to
perform this work at PNNL.
NR 42
TC 60
Z9 62
U1 1
U2 32
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-9140
J9 TALANTA
JI Talanta
PD APR 15
PY 2009
VL 78
IS 1
BP 120
EP 125
DI 10.1016/j.talanta.2008.10.063
PG 6
WC Chemistry, Analytical
SC Chemistry
GA 411FO
UT WOS:000263634700018
PM 19174213
ER
PT J
AU Orr, G
Panther, DJ
Cassens, KJ
Phillips, JL
Tarasevich, BJ
Pounds, JG
AF Orr, Galya
Panther, David J.
Cassens, Kaylyn J.
Phillips, Jaclyn L.
Tarasevich, Barbara J.
Pounds, Joel G.
TI Syndecan-1 mediates the coupling of positively charged submicrometer
amorphous silica particles with actin filaments across the alveolar
epithelial cell membrane
SO TOXICOLOGY AND APPLIED PHARMACOLOGY
LA English
DT Article
DE Toxicity; Biocompatibility; Proteoglycan; Syndecan; Silica; Alveolar;
Actin; Macropinocytosis
ID FIBROBLAST-GROWTH-FACTOR; IN-VITRO; SURFACE PROTEOGLYCAN; CYTOPLASMIC
DOMAINS; CHONDROITIN SULFATE; DRUG-DELIVERY; PDZ PROTEIN; A549 CELLS;
NANOPARTICLES; RECEPTORS
AB The cellular interactions and pathways of engineered submicro- and nano-scale particles dictate the cellular response and ultimately determine the level of toxicity or biocompatibility of the particles. Positive surface charge call increase particle internalization, and in some cases call also increase particle toxicity, but the underlying Mechanisms are largely unknown. Here we identify the cellular interaction and pathway of positively charged submicrometer synthetic amorphous silica Particles, which are used extensively ill a wide range of industrial applications, and lie explored for drug delivery and medical imaging and sensing. Using time lapse fluorescence imaging in living cells and other quantitative imaging, approaches, it IS found that heparan surface proteoglycans play a critical role ill the attachment and internalization of the particles in alveolar type II epithelial cell line (C10), a potential target cell type bearing apical microvilli. Specifically. the transmembrane heparan surface proteoglycan, syndecan-1, is found to mediate the initial interactions of the particles at the cell Sulfate, their coupling With actin filaments across the cell membrane, and their subsequent internalization via macropinocytosis. The observed interaction of syndecan molecules With the particle prior to their engagement with actin filaments suggests that the particles initiate their own by facilitating the clustering of the molecules, which is required for the actin coupling and subsequent internalization of syndecan. Our observations identify a new role for syndecan-1 in mediating the cellular interactions and fate of positively charged submicrometer amorphous silica particles in the alveolar type II epithelial cell, a target cell for inhaled particles. (C) 2009 Elsevier Inc. All rights reserved.
C1 [Orr, Galya; Panther, David J.; Cassens, Kaylyn J.; Phillips, Jaclyn L.; Tarasevich, Barbara J.; Pounds, Joel G.] Pacific NW Natl Lab, Richland, WA 99354 USA.
RP Orr, G (reprint author), Pacific NW Natl Lab, POB 999,MSIN K8-88, Richland, WA 99354 USA.
EM galya.orr@pnl.gov
OI Pounds, Joel/0000-0002-6616-1566
NR 64
TC 21
Z9 21
U1 1
U2 9
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0041-008X
J9 TOXICOL APPL PHARM
JI Toxicol. Appl. Pharmacol.
PD APR 15
PY 2009
VL 236
IS 2
BP 210
EP 220
DI 10.1016/j.taap.2009.01.022
PG 11
WC Pharmacology & Pharmacy; Toxicology
SC Pharmacology & Pharmacy; Toxicology
GA 429XV
UT WOS:000264954300008
PM 19371605
ER
PT J
AU Mukhopadhyay, S
Tsang, YW
Finsterle, S
AF Mukhopadhyay, Sumit
Tsang, Yvonne W.
Finsterle, Stefan
TI Parameter estimation from flowing fluid temperature logging data in
unsaturated fractured rock using multiphase inverse modeling
SO WATER RESOURCES RESEARCH
LA English
DT Article
ID PNEUMATIC INJECTION TESTS; YUCCA MOUNTAIN; POROUS-MEDIA; HYDRAULIC
CONDUCTIVITY; CURVE INTERPRETATION; HEATER TEST; TUFF; TRANSPORT;
NEVADA; SYSTEM
AB A simple conceptual model has been recently developed for analyzing pressure and temperature data from flowing fluid temperature logging (FFTL) in unsaturated fractured rock. Using this conceptual model, we developed an analytical solution for FFTL pressure response, and a semianalytical solution for FFTL temperature response. We also proposed a method for estimating fracture permeability from FFTL temperature data. The conceptual model was based on some simplifying assumptions, particularly that a single-phase airflow model was used. In this paper, we develop a more comprehensive numerical model of multiphase flow and heat transfer associated with FFTL. Using this numerical model, we perform a number of forward simulations to determine the parameters that have the strongest influence on the pressure and temperature response from FFTL. We then use the iTOUGH2 optimization code to estimate these most sensitive parameters through inverse modeling and to quantify the uncertainties associated with these estimated parameters. We conclude that FFTL can be utilized to determine permeability, porosity, and thermal conductivity of the fracture rock. Two other parameters, which are not properties of the fractured rock, have strong influence on FFTL response. These are pressure and temperature in the borehole that were at equilibrium with the fractured rock formation at the beginning of FFTL. We illustrate how these parameters can also be estimated from FFTL data.
C1 [Mukhopadhyay, Sumit; Tsang, Yvonne W.; Finsterle, Stefan] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Mukhopadhyay, S (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM smukhopadhyay@lbl.gov
RI Finsterle, Stefan/A-8360-2009
OI Finsterle, Stefan/0000-0002-4446-9906
FU U. S. Department of Energy; U. S. Department of Energy
[DE-AC02-05CH11231]
FX We thank the anonymous reviewers for their careful and critical review
of the manuscript. We thank Teamrat Ghezzehei and Dan Hawkes of the
Ernest Orlando Lawrence Berkeley National Laboratory (Berkeley Lab) for
their constructive review of the draft manuscript. We also thank Chin-Fu
Tsang and Paul Cook of the Berkeley lab for sharing with us the
photographs of the FFTL instrument (Figure 1) and the FFTL data (Figure
2). Diana M. Swantek of the Berkeley Lab prepared the graphics for
Figure 3, and her contribution is duly acknowledged. This work was
supported by the U. S. Department of Energy. The support is provided to
Berkeley Lab through the U. S. Department of Energy contract
DE-AC02-05CH11231. The U. S. government retains and the publisher, by
accepting the article for publication, acknowledges that the U. S.
government retains a nonexclusive, paid-up, irrevocable, worldwide
license to publish or reproduce the published form of this manuscript,
or allow others to do so, for U. S. government purposes. The views
expressed in this article are those of the authors and do not
necessarily reflect the views or policies of the U. S. Department of
Energy or the Berkeley Lab.
NR 56
TC 1
Z9 1
U1 1
U2 9
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0043-1397
EI 1944-7973
J9 WATER RESOUR RES
JI Water Resour. Res.
PD APR 15
PY 2009
VL 45
AR W04414
DI 10.1029/2008WR006869
PG 17
WC Environmental Sciences; Limnology; Water Resources
SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water
Resources
GA 435GV
UT WOS:000265333000001
ER
PT J
AU Kim, S
Lee, JS
Mitterbauer, C
Ramasse, QM
Sarahan, MC
Browning, ND
Park, HJ
AF Kim, Sangtae
Lee, Jong Soo
Mitterbauer, Christoph
Ramasse, Quentin M.
Sarahan, Michael C.
Browning, Nigel D.
Park, Hee Jung
TI Anomalous Electrical Conductivity of Nanosheaves of CeO2
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID DOPED CERIA; NANOPARTICLES; ELECTROLYTES; SHIFT
AB CeO2 is a functional oxide known to conduct oxygen ions at elevated temperatures. Enhancement of the ionic conductivity can lead to its application as an electrolyte for solid oxide fuel cells that can operate at low temperatures. We report here a one-dimensional CeO2 nanostructure with a novel sheaflike morphology which exhibits the oxygen-ionic conductivity distinctively higher than that of conventional CeO2 electrolyte. The oxygen nonstoichiometry in the CeO2 nanowires constituting the sheaf was determined by electron energy loss spectroscopy (EELS) and was found to be very small. We thus attribute this anomalously high ionic conductivity to enhanced oxygen-ion mobility at the interfaces between CeO2 nanowires in the sheaf rather than to increased charge-carrier concentration which is often responsible for enhanced ionic conductivity in nanostructured ionic conductors.
C1 [Kim, Sangtae; Lee, Jong Soo; Mitterbauer, Christoph; Sarahan, Michael C.; Browning, Nigel D.; Park, Hee Jung] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
[Browning, Nigel D.] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA 94550 USA.
[Ramasse, Quentin M.] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
RP Kim, S (reprint author), Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
EM chmkim@ucdavis.edu
RI Lee, Jong-Soo /F-7461-2010;
OI Lee, Jong-Soo /0000-0002-3045-2206; Browning, Nigel/0000-0003-0491-251X
FU Korea Government [KRF-2005-214-D00305]; Department of Energy
[DE-FG02-03ER46057]
FX J.S.L. is grateful for partial support from the Korea Research
Foundation Grant funded by Korea Government for this work (MOEHRD, Basic
Research Promotion Fund, KRF-2005-214-D00305). N.D.B. gratefully
acknowledges the support from the Department of Energy
(DE-FG02-03ER46057).
NR 27
TC 25
Z9 26
U1 1
U2 27
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0897-4756
J9 CHEM MATER
JI Chem. Mat.
PD APR 14
PY 2009
VL 21
IS 7
BP 1182
EP 1186
DI 10.1021/cm801584e
PG 5
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 430YS
UT WOS:000265029100006
ER
PT J
AU Dawes, R
Passalacqua, A
Wagner, AF
Sewell, TD
Minkoff, M
Thompson, DL
AF Dawes, Richard
Passalacqua, Alessio
Wagner, Albert F.
Sewell, Thomas D.
Minkoff, Michael
Thompson, Donald L.
TI Interpolating moving least-squares methods for fitting potential energy
surfaces: Using classical trajectories to explore configuration space
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
DE convergence of numerical methods; curve fitting; HF calculations;
hydrogen compounds; isomerisation; least squares approximations;
minimisation; potential energy surfaces; reaction kinetics theory;
reaction rate constants
ID NEURAL-NETWORKS; REACTION DYNAMICS; REPRESENTATION; CONVERGENCE;
MOLECULES; H-3(+); HONO
AB We develop two approaches for growing a fitted potential energy surface (PES) by the interpolating moving least-squares (IMLS) technique using classical trajectories. We illustrate both approaches by calculating nitrous acid (HONO) cis -> trans isomerization trajectories under the control of ab initio forces from low-level HF/cc-pVDZ electronic structure calculations. In this illustrative example, as few as 300 ab initio energy/gradient calculations are required to converge the isomerization rate constant at a fixed energy to similar to 10%. Neither approach requires any preliminary electronic structure calculations or initial approximate representation of the PES (beyond information required for trajectory initial conditions). Hessians are not required. Both approaches rely on the fitting error estimation properties of IMLS fits. The first approach, called IMLS-accelerated direct dynamics, propagates individual trajectories directly with no preliminary exploratory trajectories. The PES is grown "on the fly" with the computation of new ab initio data only when a fitting error estimate exceeds a prescribed tight tolerance. The second approach, called dynamics-driven IMLS fitting, uses relatively inexpensive exploratory trajectories to both determine and fit the dynamically accessible configuration space. Once exploratory trajectories no longer find configurations with fitting error estimates higher than the designated accuracy, the IMLS fit is considered to be complete and usable in classical trajectory calculations or other applications.
C1 [Dawes, Richard; Passalacqua, Alessio; Sewell, Thomas D.; Thompson, Donald L.] Univ Missouri, Dept Chem, Columbia, MO 65211 USA.
[Wagner, Albert F.; Minkoff, Michael] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
RP Dawes, R (reprint author), Univ Missouri, Dept Chem, Columbia, MO 65211 USA.
EM thompsondon@missouri.edu
RI Dawes, Richard/C-6344-2015
FU Office of Basic Energy Sciences; Division of Chemical Sciences; U. S.
Department of Energy [W-31-109-Eng-38, DE-FG02-01ER15231]
FX This work was supported by the Office of Basic Energy Sciences, Division
of Chemical Sciences, U. S. Department of Energy under Contract Nos.
W-31-109-Eng-38 (Argonne) and DE-FG02-01ER15231 (University of
Missouri-Columbia).
NR 42
TC 27
Z9 28
U1 0
U2 15
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD APR 14
PY 2009
VL 130
IS 14
AR 144107
DI 10.1063/1.3111261
PG 9
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 439HC
UT WOS:000265617200009
PM 19368429
ER
PT J
AU Galperin, M
Ratner, MA
Nitzan, A
AF Galperin, Michael
Ratner, Mark A.
Nitzan, Abraham
TI Raman scattering in current-carrying molecular junctions
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
DE adsorption; charge exchange; Green's function methods; ground states;
molecular electronics; surface enhanced Raman scattering; vibrational
modes
ID SURFACE-ENHANCED RAMAN; SINGLE-MOLECULE; METAL SPHERES; SPECTROSCOPY;
TRANSPORT; SERS
AB We present a theory for Raman scattering by current-carrying molecular junctions. The approach combines a nonequilibrium Green's function (NEGF) description of the nonequilibrium junction with a generalized scattering theory formulation for evaluating the light scattering signal. This generalizes our previous study [M. Galperin and A. Nitzan, Phys. Rev. Lett. 95, 206802 (2005); J. Chem. Phys. 124, 234709 (2006)] of junction spectroscopy by including molecular vibrations and developing machinery for calculation of state-to-state (Raman scattering) fluxes within the NEGF formalism. For large enough voltage bias, we find that the light scattering signal contains, in addition to the normal signal associated with the molecular ground electronic state, also a contribution from the inverse process originated from the excited molecular state as well as an interference component. The effects of coupling to the electrodes and of the imposed bias on the total Raman scattering as well as its components are discussed. Our result reduces to the standard expression for Raman scattering in the isolated molecule case, i.e., in the absence of coupling to the electrodes. The theory is used to discuss the charge-transfer contribution to surface enhanced Raman scattering for molecules adsorbed on metal surfaces and its manifestation in the biased junction.
C1 [Galperin, Michael] Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA.
[Ratner, Mark A.; Nitzan, Abraham] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
[Ratner, Mark A.; Nitzan, Abraham] Northwestern Univ, Mat Res Ctr, Evanston, IL 60208 USA.
[Nitzan, Abraham] Tel Aviv Univ, Sackler Fac Sci, Sch Chem, IL-69978 Tel Aviv, Israel.
[Galperin, Michael] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Galperin, Michael] Los Alamos Natl Lab, Ctr Integrated Nanotechnol CINT, Los Alamos, NM 87545 USA.
RP Galperin, M (reprint author), Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA.
EM migalperin@ucsd.edu
RI Abraham, Nitzan/A-9963-2008; Galperin, Michael/B-2838-2011
OI Galperin, Michael/0000-0002-1401-5970
FU Israel Science Foundation [1646/08]; U. S.-Israel Binational;
Germany-Israel Foundation; European Research Commission; UCSD startup
funds; C Academic Senate research grant; LANL Director's; NSF; MRSEC
program of the NSF; Northwestern MRSEC [DMR 0520513]; U. S. Department
of Energy [DE-AC5206NA25396]
FX The research of A. N. is supported by the Israel Science Foundation
(Grant No. 1646/08), the U. S.-Israel Binational Science Foundation, the
Germany-Israel Foundation, and the European Research Commission. M. G.
gratefully acknowledges the support of UCSD startup funds, UC Academic
Senate research grant, and a LANL Director's Postdoctoral Fellowship. M.
R. thanks the Chemistry Division of the NSF, and the MRSEC program of
the NSF, through the Northwestern MRSEC (Grant No. DMR 0520513), for
support. This work was performed, in part, at the Center for Integrated
Nanotechnologies, a U. S. Department of Energy, Office of Basic Energy
Sciences user facility. Los Alamos National Laboratory, an affirmative
action equal opportunity employer, is operated by Los Alamos National
Security, LLC, for the National Nuclear Security Administration of the
U. S. Department of Energy under Contract No. DE-AC5206NA25396.
NR 48
TC 41
Z9 43
U1 0
U2 18
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD APR 14
PY 2009
VL 130
IS 14
AR 144109
DI 10.1063/1.3109900
PG 19
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 439HC
UT WOS:000265617200011
PM 19368431
ER
PT J
AU Hooper, JB
Bedrov, D
Smith, GD
Hanson, B
Borodin, O
Dattelbaum, DM
Kober, EM
AF Hooper, Justin B.
Bedrov, Dmitry
Smith, Grant D.
Hanson, Ben
Borodin, Oleg
Dattelbaum, Dana M.
Kober, Edward M.
TI A molecular dynamics simulation study of the pressure-volume-temperature
behavior of polymers under high pressure
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
DE elastic moduli; equations of state; high-pressure effects; molecular
dynamics method; polymers
ID BETA-RELAXATION PROCESSES; 1,4-POLYBUTADIENE MELT; QUANTUM-CHEMISTRY;
ALPHA-RELAXATION; POLYBUTADIENE; EQUATIONS; SYSTEMS; STATE
AB Isothermal compression of poly (dimethylsiloxane), 1,4-poly(butadiene), and a model Estane (R) (in both pure form and a nitroplasticized composition similar to PBX-9501 binder) at pressures up to 100 kbars has been studied using atomistic molecular dynamics (MD) simulations. Comparison of predicted compression, bulk modulus, and U(s)-u(p) behavior with experimental static and dynamic compression data available in the literature reveals good agreement between experiment and simulation, indicating that MD simulations utilizing simple quantum-chemistry-based potentials can be used to accurately predict the behavior of polymers at relatively high pressure. Despite their very different zero-pressure bulk moduli, the compression, modulus, and U(s)-u(p) behavior (including low-pressure curvature) for the three polymers could be reasonably described by the Tait equation of state (EOS) utilizing the universal C parameter. The Tait EOS was found to provide an excellent description of simulation PVT data when the C parameter was optimized for each polymer. The Tait EOS parameters, namely, the zero-pressure bulk modulus and the C parameter, were found to correlate well with free volume for these polymers as measured in simulations by a simple probe insertion algorithm. Of the polymers studied, PDMS was found to have the most free volume at low pressure, consistent with its lower ambient pressure bulk modulus and greater increase in modulus with increasing pressure (i.e., crush-up behavior).
C1 [Hooper, Justin B.; Bedrov, Dmitry; Smith, Grant D.; Hanson, Ben] Univ Utah, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USA.
[Borodin, Oleg] Wasatch Mol Inc, Salt Lake City, UT 84108 USA.
[Dattelbaum, Dana M.; Kober, Edward M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Hooper, JB (reprint author), Univ Utah, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USA.
EM gds8@utah.edu
RI Borodin, Oleg/B-6855-2012
OI Borodin, Oleg/0000-0002-9428-5291
FU Simulation of Accidental Fires and Explosions (C-SAFE); Department of
Energy, Lawrence Livermore National Laboratory [B341493]; Department of
Energy; Los Alamos National Laboratory [LANL0591300104]; Air Force
Office of Scientific Research [FA8651-08-M-0125]
FX J. B. H., D. B., and G. D. S. gratefully acknowledge the financial
support of the University of Utah Center for the Simulation of
Accidental Fires and Explosions (C-SAFE), funded by the Department of
Energy, Lawrence Livermore National Laboratory, under Subcontract No.
B341493, as well as support from the Department of Energy, Los Alamos
National Laboratory, under Contract No. LANL0591300104. An allocation of
computer time from the Center for High Performance Computing at the
University of Utah is gratefully acknowledged. O. B. acknowledges
support from the Air Force Office of Scientific Research (Contract No.
FA8651-08-M-0125).
NR 41
TC 18
Z9 18
U1 3
U2 28
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD APR 14
PY 2009
VL 130
IS 14
AR 144904
DI 10.1063/1.3077868
PG 11
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 439HC
UT WOS:000265617200048
PM 19368468
ER
PT J
AU Taube, AG
Bartlett, RJ
AF Taube, Andrew G.
Bartlett, Rodney J.
TI Rethinking linearized coupled-cluster theory
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
DE coupled cluster calculations; potential energy surfaces
ID BODY PERTURBATION-THEORY; CORRELATED MOLECULAR CALCULATIONS;
GAUSSIAN-BASIS SETS; AB-INITIO; ELECTRON CORRELATION;
CONFIGURATION-INTERACTION; THEORETICAL METHODS; LEVEL SHIFT; DYNAMICS;
ENERGY
AB Hermitian linearized coupled-cluster methods have several advantages over more conventional coupled-cluster methods including facile analytical gradients for searching a potential energy surface. A persistent failure of linearized methods, however, is the presence of singularities on the potential energy surface. A simple Tikhonov regularization procedure is introduced that can eliminate this singularity. Application of the regularized linearized coupled-cluster singles and doubles (CCSD) method to both equilibrium structures and transition states shows that it is competitive with or better than conventional CCSD, and is more amenable to parallelization.
C1 [Taube, Andrew G.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Bartlett, Rodney J.] Univ Florida, Quantum Theory Project, Gainesville, FL 32611 USA.
RP Taube, AG (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM agtaube@sandia.gov
RI Bartlett, Rodney/F-6781-2011
OI Bartlett, Rodney/0000-0003-3865-9639
FU University of Florida Alumni Fellowship; John von Neumann; United States
Department of Energy [DE-AC04-94AL85000]
FX A. G. T. would like to thank support through a University of Florida
Alumni Fellowship and the John von Neumann Post- Doctoral Research
Fellowship in Computational Science at Sandia. Sandia is a multiprogram
laboratory operated by Sandia Corporation, a Lockheed Martin Company,
for the United States Department of Energy under Contract No.
DE-AC04-94AL85000.
NR 70
TC 40
Z9 40
U1 0
U2 15
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD APR 14
PY 2009
VL 130
IS 14
AR 144112
DI 10.1063/1.3115467
PG 14
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 439HC
UT WOS:000265617200014
PM 19368434
ER
PT J
AU Zhang, W
Lu, WC
Zang, QJ
Wang, CZ
Ho, KM
AF Zhang, Wei
Lu, Wen-Cai
Zang, Qing-Jun
Wang, C. Z.
Ho, K. M.
TI Bulklike structures for medium-sized Al-n (n=31-40) clusters
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
DE aluminium; density functional theory; genetic algorithms; metal
clusters; stacking faults; tight-binding calculations
ID SMALL ALUMINUM CLUSTERS; PHOTOELECTRON-SPECTROSCOPY;
ELECTRONIC-STRUCTURE; BINDING; EVOLUTION; DYNAMICS; AL-77
AB Neutral aluminum clusters Al-n (n=31-40) were studied using a genetic algorithm (GA)/tight-binding (TB) search combined with DFT-PBE calculations. It is found that the medium-sized aluminum clusters Al-31 to Al-40 exhibit a bulklike stacking pattern. Anion clusters were also studied.
C1 [Zhang, Wei; Lu, Wen-Cai; Zang, Qing-Jun] Jilin Univ, Inst Theoret Chem, State Key Lab Theoret & Computat Chem, Changchun 130021, Jilin, Peoples R China.
[Lu, Wen-Cai] Qingdao Univ, Dept Phys, Qingdao 266071, Shandong, Peoples R China.
[Lu, Wen-Cai] Qingdao Univ, State Key Lab Cultivat Base Adv Fibers & Text Mat, Qingdao 266071, Shandong, Peoples R China.
[Wang, C. Z.; Ho, K. M.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Wang, C. Z.; Ho, K. M.] Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
RP Lu, WC (reprint author), Jilin Univ, Inst Theoret Chem, State Key Lab Theoret & Computat Chem, Changchun 130021, Jilin, Peoples R China.
EM wencailu@jlu.edu.cn
OI Wang, Chong/0000-0003-4489-4344
NR 36
TC 13
Z9 13
U1 3
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD APR 14
PY 2009
VL 130
IS 14
AR 144701
DI 10.1063/1.3090485
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 439HC
UT WOS:000265617200039
PM 19368459
ER
PT J
AU Abel, MJ
Pfeifer, T
Jullien, A
Nagel, PM
Bell, MJ
Neumark, DM
Leone, SR
AF Abel, Mark J.
Pfeifer, Thomas
Jullien, Aurelie
Nagel, Phillip M.
Bell, M. Justine
Neumark, Daniel M.
Leone, Stephen R.
TI Carrier-envelope phase-dependent quantum interferences in multiphoton
ionization
SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
LA English
DT Article
ID MOLECULAR-OXYGEN; FREQUENCY; PHOTOELECTRON; GENERATION; LASERS
AB The angular distribution of photoelectrons created by multiphoton ionization of xenon atoms by a few-cycle laser pulse shows a carrier-envelope phase (CEP) dependent asymmetry. A simple perturbative model based on a sum over indistinguishable quantum paths describes the observed asymmetry as a function of photoelectron energy and CEP. Although the individual multiphoton transition rates depend on the intensity profile of the pulse, the experimentally measured photoelectron angular distributions are sensitive to the absolute spectral phase of the pulse, including both CEP and chirp. We discuss retrieval of the CEP and chirp from the asymmetry pattern, as well as the potential to extract the scattering phase shift.
C1 [Abel, Mark J.; Pfeifer, Thomas; Jullien, Aurelie; Nagel, Phillip M.; Bell, M. Justine; Neumark, Daniel M.; Leone, Stephen R.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Abel, Mark J.; Pfeifer, Thomas; Jullien, Aurelie; Nagel, Phillip M.; Bell, M. Justine; Neumark, Daniel M.; Leone, Stephen R.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Abel, Mark J.; Pfeifer, Thomas; Jullien, Aurelie; Nagel, Phillip M.; Bell, M. Justine; Neumark, Daniel M.; Leone, Stephen R.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Abel, MJ (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM srl@berkeley.edu
RI Neumark, Daniel/B-9551-2009; Jullien, Aurelie/C-8345-2009
OI Neumark, Daniel/0000-0002-3762-9473;
FU Air Force Office of Scientific Research [FA9550-04-1-0242]; US
Department of Energy [DE-AC02-05CH11231]; Alexander von
Humboldt-Foundation; National Science Foundation Grant
FX The authors wish to thank Lukas Gallmann, Jason Jones and Jun Ye for
significant contributions to the experimental apparatus. The project is
supported by a MURI program from the Air Force Office of Scientific
Research, contract no. FA9550-04-1-0242. Portions of the laboratory were
supported by the Director, Office Of Science, Office of Basic Energy
Sciences, of the US Department of Energy under contract
DE-AC02-05CH11231. TP acknowledges support of a Feodor Lynen Fellowship
of the Alexander von Humboldt-Foundation. MJB and PMN are recently
supported by a National Science Foundation Grant.
NR 24
TC 14
Z9 14
U1 2
U2 9
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-4075
J9 J PHYS B-AT MOL OPT
JI J. Phys. B-At. Mol. Opt. Phys.
PD APR 14
PY 2009
VL 42
IS 7
AR 075601
DI 10.1088/0953-4075/42/7/075601
PG 8
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 423OF
UT WOS:000264504900014
ER
PT J
AU Berchtold, KA
Hacioglu, B
Nie, J
Cramer, NB
Stansbury, JW
Bowman, CN
AF Berchtold, Kathryn A.
Hacioglu, Bilge
Nie, Jun
Cramer, Neil B.
Stansbury, Jeffrey W.
Bowman, Christopher N.
TI Rapid Solid-State Photopolymerization of Cyclic Acetal-Containing
Acrylates
SO MACROMOLECULES
LA English
DT Article
ID REACTIVE ACRYLIC-MONOMERS; MOLECULAR-WEIGHT DISTRIBUTION;
LIQUID-CRYSTALLINE ACRYLATES; LIGHT-INDUCED POLYMERIZATION; INSITU
PHOTOPOLYMERIZATION; MULTIFUNCTIONAL MONOMERS; MESOGENIC DIACRYLATE;
REACTION BEHAVIOR; KINETIC-ANALYSIS; METHACRYLATE
AB A cyclic acetal-functionalized urethane acrylate monomer is synthesized here and polymerized in a crystalline state without the polymerization kinetics being deleteriously affected by the solid state. Depending on the processing conditions, the cyclic acetal urethane acrylate monomer exists in either a metastable liquid state or a crystalline state at ambient conditions. Because of mobility restrictions, extremely poor polymerization kinetics and functional group conversions are typically achieved in solid-state polymerizations. However, the solid-state photopolymerization of a cyclic acetal urethane acrylate results in nearly identical polymerization rates and ultimately higher conversion in the crystalline state than in the liquid state under otherwise identical conditions. We conclude that the crystallization process occurs in such a manner as to template the acrylic double bonds in a structure that facilitates rapid, minimally activated propagation.
C1 [Hacioglu, Bilge; Cramer, Neil B.; Stansbury, Jeffrey W.; Bowman, Christopher N.] Univ Colorado, Dept Biol & Chem Engn, Boulder, CO 80309 USA.
[Berchtold, Kathryn A.] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
[Nie, Jun] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China.
[Nie, Jun] Beijing Univ Chem Technol, Coll Mat Sci & Engn, Beijing 100029, Peoples R China.
[Stansbury, Jeffrey W.; Bowman, Christopher N.] Univ Colorado Denver, Sch Dent Med, Dept Craniofacial Biol, Aurora, CO 80045 USA.
RP Bowman, CN (reprint author), Univ Colorado, Dept Biol & Chem Engn, CB 424, Boulder, CO 80309 USA.
EM christopher.bowman@colorado.edu
RI Bowman, Christopher/B-1490-2008
OI Bowman, Christopher/0000-0001-8458-7723
FU NIH [DE 10959]; National Science Foundation Industry University
Cooperative Research Center for Fundamentals and Applications
FX The authors acknowledge NIH Grant DE 10959 and the National Science
Foundation Industry University Cooperative Research Center for
Fundamentals and Applications of Photopolymerizations for funding this
work.
NR 38
TC 6
Z9 7
U1 0
U2 14
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
J9 MACROMOLECULES
JI Macromolecules
PD APR 14
PY 2009
VL 42
IS 7
BP 2433
EP 2437
DI 10.1021/ma802406j
PG 5
WC Polymer Science
SC Polymer Science
GA 430MD
UT WOS:000264992300021
PM 20827437
ER
PT J
AU Yang, L
Tulk, CA
Klug, DD
Moudrakovski, IL
Ratcliffe, CI
Ripmeester, JA
Chakoumakos, BC
Ehm, L
Martin, CD
Parise, JB
AF Yang, L.
Tulk, C. A.
Klug, D. D.
Moudrakovski, I. L.
Ratcliffe, C. I.
Ripmeester, J. A.
Chakoumakos, B. C.
Ehm, L.
Martin, C. D.
Parise, J. B.
TI Synthesis and characterization of a new structure of gas hydrate
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE high pressure; ice; clathrate hydrate
ID CLATHRATE HYDRATE; METHANE HYDRATE; STRUCTURE-H; PRESSURE; XENON;
TRANSFORMATIONS; ARGON; GPA
AB Atoms and molecules < 0.9 nm in diameter can be incorporated in the cages formed by hydrogen-bonded water molecules making up the crystalline solid clathrate hydrates. For these materials crystallographic structures generally fall into 3 categories, which are 2 cubic forms and a hexagonal form. A unique clathrate hydrate structure, previously known only hypothetically, has been synthesized at high pressure and recovered at 77 K and ambient pressure in these experiments. These samples contain Xe as a guest atom and the details of this previously unobserved structure are described here, most notably the host-guest ratio is similar to the cubic Xe clathrate starting material. After pressure quench recovery to 1 atmosphere the structure shows considerable metastability with increasing temperature (T < 160 K) before reverting back to the cubic form. This evidence of structural complexity in compositionally similar clathrate compounds indicates that the reaction path may be an important determinant of the structure, and impacts upon the structures that might be encountered in nature.
C1 [Yang, L.; Tulk, C. A.; Chakoumakos, B. C.] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
[Yang, L.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
[Klug, D. D.; Moudrakovski, I. L.; Ratcliffe, C. I.; Ripmeester, J. A.] Natl Res Council Canada, Steacie Inst Mol Sci, Ottawa, ON K1A 0R6, Canada.
[Ehm, L.; Parise, J. B.] SUNY Stony Brook, Inst Mineral Phys, Dept Geosci, Stony Brook, NY 11794 USA.
[Martin, C. D.] Argonne Natl Lab, Adv Photon Source, Xray Sci Div, Argonne, IL 60439 USA.
RP Tulk, CA (reprint author), Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
EM tulkca@ornl.gov
RI Chakoumakos, Bryan/A-5601-2016; Tulk, Chris/R-6088-2016
OI Chakoumakos, Bryan/0000-0002-7870-6543; Tulk, Chris/0000-0003-3400-3878
FU UTBattelle, LLC [DE-AC05-00OR22725]; DOE-BES at the Spallation Neutron
Source; Center for Nanophase Materials Science (L. Y.) at Oak Ridge
National Laboratory; National Science Foundation [DMR-0800415]
FX Oak Ridge National Laboratory is managed by UTBattelle, LLC for the U.
S. Department of Energy under Contract DE-AC05-00OR22725. This work was
supported by the scientific user facilities division of DOE-BES at the
Spallation Neutron Source (C. A. T., L. Y., and B. C. C.) and Center for
Nanophase Materials Science (L. Y.) at Oak Ridge National Laboratory;
and the National Science Foundation Grant DMR-0800415 (to C. D. M., L.
E., and J. B. P.).
NR 25
TC 37
Z9 37
U1 4
U2 48
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD APR 14
PY 2009
VL 106
IS 15
BP 6060
EP 6064
DI 10.1073/pnas.0809342106
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 433AB
UT WOS:000265174600008
PM 19332791
ER
PT J
AU Finzi-Hart, JA
Pett-Ridge, J
Weber, PK
Popa, R
Fallon, SJ
Gunderson, T
Hutcheon, ID
Nealson, KH
Capone, DG
AF Finzi-Hart, Juliette A.
Pett-Ridge, Jennifer
Weber, Peter K.
Popa, Radu
Fallon, Stewart J.
Gunderson, Troy
Hutcheon, Ian D.
Nealson, Kenneth H.
Capone, Douglas G.
TI Fixation and fate of C and N in the cyanobacterium Trichodesmium using
nanometer-scale secondary ion mass spectrometry
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE NanoSIMS; stable isotope labeling; cyanophycin
ID NORTH PACIFIC-OCEAN; MARINE OSCILLATORIA TRICHODESMIUM; AEROBIC
NITROGEN-FIXATION; BLUE-GREEN-ALGA; N-2 FIXATION; NONHETEROCYSTOUS
CYANOBACTERIUM; DIAZOTROPHIC CYANOBACTERIA; ANABAENA-CYLINDRICA;
LOCALIZATION; OXYGEN
AB The marine cyanobacterium Trichodesmium is ubiquitous in tropical and subtropical seas and is an important contributor to global N and C cycling. We sought to characterize metabolic uptake patterns in individual Trichodesmium IMS-101 cells by quantitatively imaging (13)C and (15)N uptake with high-resolution secondary ion mass spectrometry (NanoSIMS). Trichodesmium fix both CO(2) and N(2) concurrently during the day and are, thus, faced with a balancing act: the O(2) evolved during photosynthesis inhibits nitrogenase, the key enzyme in N(2) fixation. After performing correlated transmission electron microscopy (TEM) and NanoSIMS analysis on trichome thin-sections, we observed transient inclusion of (15)N and (13)C into discrete subcellular bodies identified as cyanophycin granules. We speculate that Trichodesmium uses these dynamic storage bodies to uncouple CO(2) and N(2) fixation from overall growth dynamics. We also directly quantified both CO(2) and N(2) fixation at the single cell level using NanoSIMS imaging of whole cells in multiple trichomes. Our results indicate maximal CO(2) fixation rates in the morning, compared with maximal N(2) fixation rates in the afternoon, bolstering the argument that segregation of CO(2) and N(2) fixation in Trichodesmium is regulated in part by temporal factors. Spatial separation of N(2) and CO(2) fixation may also have a role in metabolic segregation in Trichodesmium. Our approach in combining stable isotope labeling with NanoSIMS and TEM imaging can be extended to other physiologically relevant elements and processes in other important microbial systems.
C1 [Finzi-Hart, Juliette A.; Gunderson, Troy; Nealson, Kenneth H.; Capone, Douglas G.] Univ So Calif, Wrigley Inst Environm Studies, Los Angeles, CA 90089 USA.
[Finzi-Hart, Juliette A.; Gunderson, Troy; Nealson, Kenneth H.; Capone, Douglas G.] Univ So Calif, Dept Biol Sci, Los Angeles, CA 90089 USA.
[Pett-Ridge, Jennifer; Weber, Peter K.; Hutcheon, Ian D.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Popa, Radu] Portland State Univ, Dept Biol, Portland, OR 97207 USA.
[Fallon, Stewart J.] Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 0200, Australia.
RP Finzi-Hart, JA (reprint author), Univ So Calif, Wrigley Inst Environm Studies, 3616 Trousdale Pkwy, Los Angeles, CA 90089 USA.
EM jahart@usc.edu
RI Fallon, Stewart/G-6645-2011
OI Fallon, Stewart/0000-0002-8064-5903
FU U. S. Department of Education Office of Biological and Environmental
Research Genomics Genomes to Life Research Program; National Science
Foundation Ocean Science Program [OCE 0452765, OCE 0753218]; U. S.
Department of Energy [DE-AC52-07NA27344]
FX We thank John Waterbury (Wood Hole Oceanographic Institution, Woods
Hole, MA) for providing us his Trichodesmium culture, IMS-101; Rachel
Foster (University of California Santa Cruz) and Ed Carpenter (San
Francisco State University) for their aid in identifying cyanophycin in
the TEM images; Larry Nittler (Carnegie Institute of Washington) for
software development; Christina Ramon [Lawrence Livermore National
Laboratory (LLNL)] for assistance with sample preparation for NanoSIMS
and TEM analysis; and 3 anonymous reviewers, who provided valuable
comments that helped improve the manuscript. This work was supported in
part by the U. S. Department of Education Office of Biological and
Environmental Research Genomics Genomes to Life Research Program
(J.P.-R. and P.K.W.), and the National Science Foundation Ocean Science
Program Grants OCE 0452765 and OCE 0753218. LLNL was supported by U. S.
Department of Energy Contract DE-AC52-07NA27344.
NR 44
TC 72
Z9 77
U1 6
U2 38
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD APR 14
PY 2009
VL 106
IS 15
BP 6345
EP 6350
DI 10.1073/pnas.0810547106
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 433AB
UT WOS:000265174600057
PM 19332780
ER
PT J
AU Wang, GJ
Volkow, ND
Fowler, JS
AF Wang, Gene-Jack
Volkow, Nora D.
Fowler, Joanna S.
TI Reply to Burgard: Gender differences in eating behaviors and obesity
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Letter
C1 [Wang, Gene-Jack; Fowler, Joanna S.] Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA.
[Wang, Gene-Jack; Fowler, Joanna S.] NIAAA, Natl Inst Drug Abuse, Rockville, MD 20857 USA.
[Volkow, Nora D.] Mt Sinai Sch Med, Dept Psychiat, New York, NY 10029 USA.
RP Wang, GJ (reprint author), Brookhaven Natl Lab, Dept Med, 30 Bell Ave, Upton, NY 11973 USA.
EM gjwang@bnl.gov
NR 6
TC 2
Z9 2
U1 0
U2 1
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD APR 14
PY 2009
VL 106
IS 15
BP E37
EP E37
DI 10.1073/pnas.0901996106
PG 1
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 433AB
UT WOS:000265174600074
ER
PT J
AU Jaradat, S
Brimicombe, PD
Southern, C
Siemianowski, SD
DiMasi, E
Pindak, R
Gleeson, HF
AF Jaradat, S.
Brimicombe, P. D.
Southern, C.
Siemianowski, S. D.
DiMasi, E.
Pindak, R.
Gleeson, H. F.
TI Stable field-induced ferrielectric liquid crystal phases in devices
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE antiferroelectric liquid crystals; dielectric polarisation;
ferroelectric liquid crystals; ferroelectric transitions;
flexoelectricity; liquid crystal devices; liquid crystal phase
transformations; thermodynamic properties
ID X-RAY-SCATTERING; TEMPERATURE-DEPENDENCE
AB The field-induced transitions between ferri-, antiferro-, and ferroelectric liquid crystal phases are interesting because although there are only small thermodynamic differences between them, each of these phases has different electrical and optical properties. We report an irreversible field-induced transition from an antiferroelectric phase to the ferrielectric phase in a liquid crystal device, and compare it to a system in which the transition is reversible. The two systems differ mainly in their spontaneous polarization (120 nC cm(-2) for the former and 60 nC cm(-2) for the latter) while the optical tilt is comparable (29 degrees and 25 degrees, respectively). We explain the observed transitions based on the relative magnitudes of the discrete flexoelectric and spontaneous polarizations.
C1 [Jaradat, S.; Brimicombe, P. D.; Southern, C.; Siemianowski, S. D.; Gleeson, H. F.] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England.
[DiMasi, E.; Pindak, R.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Gleeson, HF (reprint author), Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England.
EM helen.gleeson@manchester.ac.uk
FU EPSRC [EP/D069793/1]; University of Manchester; U.S. Department of
Energy, Office of Basic Energy Sciences [DE-AC02-98CH10886]
FX The authors thank M. Hird and J.W. Goodby for materials, EPSRC (Grant
No. EP/D069793/1) and the University of Manchester for funding. Use of
the National Synchrotron Light Source, Brookhaven National Laboratory,
was supported by the U.S. Department of Energy, Office of Basic Energy
Sciences, under Contract No. DE-AC02-98CH10886.
NR 15
TC 4
Z9 4
U1 3
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 13
PY 2009
VL 94
IS 15
AR 153507
DI 10.1063/1.3119208
PG 3
WC Physics, Applied
SC Physics
GA 434OY
UT WOS:000265285200097
ER
PT J
AU Laurence, TA
Bude, JD
Shen, N
Feldman, T
Miller, PE
Steele, WA
Suratwala, T
AF Laurence, Ted A.
Bude, Jeff D.
Shen, Nan
Feldman, Theodore
Miller, Philip E.
Steele, William A.
Suratwala, Tayyab
TI Metallic-like photoluminescence and absorption in fused silica surface
flaws
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE energy gap; evaporation; fracture; high-speed optical techniques;
photoluminescence; polishing; silicon compounds; time resolved spectra
ID OPTICAL-MATERIALS; DAMAGE; LUMINESCENCE; RADIATION; GROWTH; SIO2
AB Using high-sensitivity confocal time-resolved photoluminescence (PL) techniques, we report an ultrafast PL (40 ps-5 ns) from impurity-free surface flaws on fused silica, including polished, indented, or fractured surfaces of fused silica, and from laser-heated evaporation pits. This PL is excited by the single-photon absorption of sub-band gap light, and is especially bright in fractures. Regions which exhibit this PL are strongly absorptive well below the band gap, as evidenced by a propensity to damage with 3.5 eV nanosecond-scale laser pulses.
C1 [Laurence, Ted A.; Bude, Jeff D.; Shen, Nan; Feldman, Theodore; Miller, Philip E.; Steele, William A.; Suratwala, Tayyab] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Laurence, TA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM laurence2@llnl.gov; bude2@llnl.gov
RI Laurence, Ted/E-4791-2011; Suratwala, Tayyab/A-9952-2013
OI Laurence, Ted/0000-0003-1474-779X; Suratwala, Tayyab/0000-0001-9086-1039
FU U.S. Department of Energy [DE-AC52-07NA27344]; Laboratory Directed
Research and Development (LDRD)
FX This work was performed under the auspices of the U.S. Department of
Energy by Lawrence Livermore National Laboratory under Contract No.
DE-AC52-07NA27344. This work was supported by the Laboratory Directed
Research and Development (LDRD) program at LLNL. T. F. was supported by
LLNL summer undergraduate internship. We thank Raluca Negres for
assistance with laser damage testing and Gabe Guss for forming the laser
evaporation pits.
NR 18
TC 54
Z9 55
U1 4
U2 35
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 13
PY 2009
VL 94
IS 15
AR 151114
DI 10.1063/1.3119622
PG 3
WC Physics, Applied
SC Physics
GA 434OY
UT WOS:000265285200014
ER
PT J
AU Lee, W
Joo, S
Kim, SU
Rhie, K
Hong, J
Shin, KH
Kim, KH
AF Lee, Wonhyun
Joo, Sungjung
Kim, Sun Ung
Rhie, Kungwon
Hong, Jinki
Shin, Kyung-Ho
Kim, Ki Hyun
TI Magnetic bead counter using a micro-Hall sensor for biological
applications
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE biosensors; Hall effect transducers; microsensors
ID PARTICLES
AB Micro-Hall sensors have been fabricated, and various numbers of micron-size magnetic beads have been placed within the sensor area. The Hall resistances measured at room temperature are found to be proportional to the number of the beads, and are in good agreement with the numerically simulated results presented in this study. Our sensors are designed to measure the number of beads between zero and full-scale signals for a given number range of interest. The effects of miniaturizing the beads and sensors to nanoscale are also discussed.
C1 [Lee, Wonhyun; Joo, Sungjung; Kim, Sun Ung; Rhie, Kungwon; Hong, Jinki] Korea Univ, Dept Phys, Chochiwon 339700, South Korea.
[Shin, Kyung-Ho] KIST, Nano Devices Res Ctr, Seoul 130650, South Korea.
[Kim, Ki Hyun] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Lee, W (reprint author), Korea Univ, Dept Phys, Chochiwon 339700, South Korea.
EM hcomet@chol.com; jkhongjkhong@korea.ac.kr
FU KIST Vision 21 Program; Korean Government (MOEHRD)
[KRF-2008-331-D00235]; IT Technology Under Ministry of Knowledge Economy
of Korea
FX This work was supported by KIST Vision 21 Program, a Korea Research
Foundation grant funded by the Korean Government (MOEHRD) (Grant No.
KRF-2008-331-D00235) and IT Technology Under Ministry of Knowledge
Economy of Korea.
NR 10
TC 14
Z9 14
U1 0
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 13
PY 2009
VL 94
IS 15
AR 153903
DI 10.1063/1.3122142
PG 3
WC Physics, Applied
SC Physics
GA 434OY
UT WOS:000265285200101
ER
PT J
AU Shukla, NC
Liao, HH
Abiade, JT
Murayama, M
Kumar, D
Huxtable, ST
AF Shukla, Nitin C.
Liao, Hao-Hsiang
Abiade, Jeremiah T.
Murayama, Mitsuhiro
Kumar, Dhananjay
Huxtable, Scott T.
TI Thermal transport in composites of self-assembled nickel nanoparticles
embedded in yttria stabilized zirconia
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE multilayers; nanoparticles; nickel; pulsed laser deposition; thermal
conductivity; yttrium compounds; zirconium compounds
ID CONDUCTIVITY; NANOSCALE; DENSE
AB We investigate the effect of nickel nanoparticle size on thermal transport in multilayer nanocomposites consisting of alternating layers of nickel nanoparticles and yttria stabilized zirconia (YSZ) spacer layers that are grown with pulsed laser deposition. Using time-domain thermoreflectance, we measure thermal conductivities of k=1.8, 2.4, 2.3, and 3.0 W m(-1) K-1 for nanocomposites with nickel nanoparticle diameters of 7, 21, 24, and 38 nm, respectively, and k=2.5 W m(-1) K-1 for a single 80 nm thick layer of YSZ. We use an effective medium theory to estimate the lower limits for interface thermal conductance G between the nickel nanoparticles and the YSZ matrix (G>170 MW m(-2) K-1), and nickel nanoparticle thermal conductivity.
C1 [Shukla, Nitin C.; Liao, Hao-Hsiang; Abiade, Jeremiah T.; Huxtable, Scott T.] Virginia Polytech Inst & State Univ, Dept Mech Engn, Blacksburg, VA 24061 USA.
[Abiade, Jeremiah T.] Virginia Polytech Inst & State Univ, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA.
[Murayama, Mitsuhiro] Virginia Polytech Inst & State Univ, Inst Crit Technol & Appl Sci, Blacksburg, VA 24061 USA.
[Kumar, Dhananjay] N Carolina Agr & Tech State Univ, Dept Mech & Chem Engn, Greensboro, NC 27411 USA.
[Kumar, Dhananjay] N Carolina Agr & Tech State Univ, CAMSS, Greensboro, NC 27411 USA.
[Kumar, Dhananjay] Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA.
RP Shukla, NC (reprint author), Virginia Polytech Inst & State Univ, Dept Mech Engn, Blacksburg, VA 24061 USA.
EM huxtable@vt.edu
RI Huxtable, Scott/F-2434-2014
FU United States National Science Foundation (U. S. NSF) [CBET-0547122];
NSF-NIRT [DMR-0403480, NSF-BRIGE EEC-0824340]; Thomas F. and Kate Miller
Jeffress Memorial Trust [J-799]
FX This work was partially supported by the United States National Science
Foundation (U. S. NSF) under Grant Nos. CBET-0547122, NSF-NIRT
DMR-0403480, and NSF-BRIGE EEC-0824340, and by the Thomas F. and Kate
Miller Jeffress Memorial Trust under Grant No. J-799. Some of this work
was carried out using instruments in the Nanoscale Characterization and
Fabrication Laboratory, a Virginia Tech facility operated by the
Institute for Critical Technology and Applied Science, and we thank W.
T. Reynolds, Jr. and J. McIntosh for their assistance with structural
characterizations.
NR 22
TC 3
Z9 3
U1 0
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 13
PY 2009
VL 94
IS 15
AR 151913
DI 10.1063/1.3116715
PG 3
WC Physics, Applied
SC Physics
GA 434OY
UT WOS:000265285200030
ER
PT J
AU Wang, BN
Zhou, JF
Koschny, T
Soukoulis, CM
AF Wang, Bingnan
Zhou, Jiangfeng
Koschny, Thomas
Soukoulis, Costas M.
TI Nonplanar chiral metamaterials with negative index
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE chirality; circular dichroism; light reflection; light transmission;
metamaterials
ID REFRACTION
AB We demonstrate experimentally and numerically that nonplanar chiral metamaterials give giant optical activity, circular dichroism, and negative refractive index. The transmission, reflection, and the retrieval results of the experiments agree pretty well with the simulations. This is an important step toward the design and fabrication of three-dimensional isotropic chiral metamaterials.
C1 [Wang, Bingnan; Zhou, Jiangfeng; Koschny, Thomas; Soukoulis, Costas M.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Wang, Bingnan; Zhou, Jiangfeng; Koschny, Thomas; Soukoulis, Costas M.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
[Koschny, Thomas; Soukoulis, Costas M.] Univ Crete, FORTH, Inst Elect Struct & Laser, Dept Mat Sci & Technol, Iraklion 71110, Crete, Greece.
RP Wang, BN (reprint author), Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
EM soukoulis@ameslab.gov
RI Soukoulis, Costas/A-5295-2008; Zhou, Jiangfeng/D-4292-2009
OI Zhou, Jiangfeng/0000-0002-6958-3342
FU Department of Energy [DE-AC02-07CH11358]; Department of Navy
[N00014-07-1-0359]; European Community [213390]; AFOSR [FA
9550-06-1-0337]
FX Work at Ames Laboratory was supported by the Department of Energy (Basic
Energy Sciences) under Contract No. DE-AC02-07CH11358. This work was
partially supported by the Department of Navy, Office of the Naval
Research (Grant No. N00014-07-1-0359), European Community FET project
PHOME (Contract No. 213390) and AFOSR under MURI Grant No. FA
9550-06-1-0337.
NR 19
TC 92
Z9 94
U1 1
U2 27
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD APR 13
PY 2009
VL 94
IS 15
AR 151112
DI 10.1063/1.3120565
PG 3
WC Physics, Applied
SC Physics
GA 434OY
UT WOS:000265285200012
ER
PT J
AU Stieler, D
Barsic, A
Biswas, R
Tuttle, G
Ho, KM
AF Stieler, Daniel
Barsic, Anthony
Biswas, Rana
Tuttle, Gary
Ho, Kai-Ming
TI A planar four-port channel drop filter in the three-dimensional woodpile
photonic crystal
SO OPTICS EXPRESS
LA English
DT Article
ID WAVE-GUIDES; BAND-GAP; WAVELENGTH; MODES
AB A compact planar channel four-port drop filter is developed experimentally and theoretically in the three-dimensional woodpile photonic crystal having a complete band gap. This consists of two waveguides separated by a defect in a single layer of the photonic crystal. Frequencies for channel dropping can be tuned throughout the band gap, by changing the size of the defect. Quality factors of similar to 1000 were measured. Simulations demonstrate directional energy transfer between the input and out put waveguides, through excitation of fields in the defect region. The planar nature of the filter is much more amenable to fabrication at optical length wavelengths. (C) 2009 Optical Society of America
C1 [Stieler, Daniel; Barsic, Anthony; Biswas, Rana; Tuttle, Gary; Ho, Kai-Ming] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
[Stieler, Daniel; Barsic, Anthony; Biswas, Rana; Tuttle, Gary] Iowa State Univ, Dept Elect & Comp Engn, Ames, IA 50011 USA.
[Stieler, Daniel; Barsic, Anthony; Biswas, Rana; Tuttle, Gary] Iowa State Univ, Microelect Res Ctr, Ames, IA 50011 USA.
[Biswas, Rana; Ho, Kai-Ming] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
RP Stieler, D (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
EM dstieler@gmail.com
FU Department of Energy, Division of Basic Energy Sciences
[DE-AC02-07CH11358]
FX Research at the Ames Laboratory was supported by the Department of
Energy, Division of Basic Energy Sciences, under Contract No.
DE-AC02-07CH11358.
NR 22
TC 10
Z9 11
U1 0
U2 3
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD APR 13
PY 2009
VL 17
IS 8
BP 6128
EP 6133
DI 10.1364/OE.17.006128
PG 6
WC Optics
SC Optics
GA 432BQ
UT WOS:000265108900026
PM 19365435
ER
PT J
AU Bazinet, P
Tilley, TD
AF Bazinet, Patrick
Tilley, T. Don
TI Octa- and Nonamethylfluorenyl Complexes of Zirconium(IV): Reactive
Hydride Derivatives and Reversible Hydrogen Migration between the Metal
and the Fluorenyl Ligand
SO ORGANOMETALLICS
LA English
DT Article
ID METALLOCENE POLYMERIZATION CATALYSTS; INTRAMOLECULAR ARENE
HYDROGENATION; REDUCTIVE ELIMINATION-REACTIONS; OLEFIN POLYMERIZATION;
GROUP-4 METALLOCENES; STEREOCHEMICAL CONSEQUENCES; ORGANOMETALLIC
DERIVATIVES; PROPYLENE POLYMERIZATIONS; DINITROGEN COMPLEX; CHAIN
TRANSFER
AB Reaction of the zirconocene dichloride Cp '' Flu*ZrCl2 (Cp '' = 1,3-(SiMe3)(2)C5H3, Flu* = C13Me9) with (BuLi)-Bu-i ((BuLi)-Bu-i = LiCH2CHMe2) resulted in elimination of isobutylene and formation of Cp ''(eta(5):eta(3)-C13Me9H)ZrH (1-syn-1,2-DHF*D), possessing an eta(5):eta(3) -dihydrofluorenediyl ligand derived from a metal-to-benzo ring hydride transfer. This species undergoes reversible hydride transfer and exists in equilibrium with only one of its three other possible isomers (1-syn-3,4-DHF*D). Compound 1-syn-1,2-DHF*D catalyzes the cyclization of 1,5-hexadiene to methylenecyclopentane, and its reaction with excess isobutylene leads to the elimination of isobutane and formation of the cyclometalated zirconocene isobutyl Species (eta(5):eta(3)-C5H3-1-SiMe3CH2-3-SiMe3)eta(5)-C13Me9)(ZrBu)-Bu-i (2). Reaction of Cp '' Flu '' ZrCl2 with (BuLi)-Bu-i directly generated the cyclometalated zirconocene species (eta(5):eta(3)-C5H3-1-SiMe3CH2-3-SiMe3)eta(5)-C13Me8H)(ZrBu)-Bu-i (3); however, reaction of the dichloride Cp '' Flu '' ZrCl2 with (BuLi)-Bu-i in the presence of hydrogen generated the dihydrofluorenediyl monohydride derivative Cp ''(eta(5):eta(3)-C13Me8H2)ZrH (4). Treatment of the cyclometalated isobutyl species 3 with H-2 led to partial hydrogenation of the Flu '' ligand and formation of the monohydride Cp ''(eta(5):eta(3)-C13Me9H)ZrH (5), which contains a hexahydrofluorenediyl ligand. Partial hydrogenation of the Flu '' ligand proceeded exclusively via an intramolecular pathway, as evidenced by the all-exo configuration of the methyl groups on the saturated benzo ring. Structural characterization of 1-syn-1,2-DHF*D, 2, 3, and 5 revealed a highly strained eta(5):eta(3-)Coordination mode for the dihydro- and hexahydrofluorenediyl ligands.
C1 [Tilley, T. Don] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
Ernest Orlando Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Tilley, TD (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM tdtilley@berkeley.edu
FU Director, Office of Energy Research; Office of Basic Energy Sciences;
Chemical Sciences Division; U.S. Department of Energy [DE-AC02-05CH 4
123 1]; NSERC
FX We thank Jennifer McBee and Joe Escalada for assistance with the X-ray
crystallography. This work was supported by the Director, Office of
Energy Research, Office of Basic Energy Sciences, Chemical Sciences
Division, U.S. Department of Energy, under Contract No. DE-AC02-05CH 4
123 1, and P.B. thanks NSERC for a postdoctoral fellowship.
NR 72
TC 4
Z9 4
U1 1
U2 4
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0276-7333
EI 1520-6041
J9 ORGANOMETALLICS
JI Organometallics
PD APR 13
PY 2009
VL 28
IS 7
BP 2285
EP 2293
DI 10.1021/om900047x
PG 9
WC Chemistry, Inorganic & Nuclear; Chemistry, Organic
SC Chemistry
GA 429PN
UT WOS:000264932700041
ER
PT J
AU Actis, S
Passarino, G
Sturm, C
Uccirati, S
AF Actis, Stefano
Passarino, Giampiero
Sturm, Christian
Uccirati, Sandro
TI NNLO computational techniques: The cases H -> gamma gamma and H -> gg
SO NUCLEAR PHYSICS B
LA English
DT Review
DE Feynman diagrams; Two-loop calculations; Radiative corrections; Higgs
physics
ID HIGGS-BOSON PRODUCTION; QUANTUM-FIELD THEORY; ELECTROWEAK
RADIATIVE-CORRECTIONS; LOOP LEADING LOGARITHMS; ANGLE SIN(2) THETA(EFF);
2-LOOP SELF-ENERGIES; VS. POLE MASSES; STANDARD MODEL; QCD CORRECTIONS;
FEYNMAN DIAGRAMS
AB A large set of techniques needed to compute decay rates at the two-loop level are derived and systematized. The main emphasis of the paper is on the two Standard Model decays H -> gamma gamma and H -> gg. The techniques, however, have a much wider range of application: they give practical examples of general rules for two-loop renormalization; they introduce simple recipes for handling internal unstable particles in two-loop processes; they illustrate simple procedures for the extraction of collinear logarithms from the amplitude. The latter is particularly relevant to show cancellations, e.g. cancellation of collinear divergencies. Furthermore, the paper deals with the proper treatment of non-enhanced two-loop QCD and electroweak contributions to different physical (pseudo-)observables, showing how they can be transformed in a way that allows for a stable numerical integration. Numerical results for the two-loop percentage corrections to H -> gamma gamma, gg are presented and discussed. When applied to the process pp ->). gg + X -> H + X, the results show that the electroweak scaling factor for the cross section is between -4% and +6% in the range 100 GeV < M-H < 500 GeV, without incongruent large effects around the physical electroweak thresholds, thereby showing that only a complete implementation of the computational scheme keeps two-loop corrections under control. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Sturm, Christian] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
[Actis, Stefano] Rhein Westfal TH Aachen, Inst Theoret Phys E, D-52056 Aachen, Germany.
[Passarino, Giampiero] Univ Turin, Dipartimento Fis Teor, I-10124 Turin, Italy.
[Passarino, Giampiero] Ist Nazl Fis Nucl, Sez Torino, Turin, Italy.
[Uccirati, Sandro] Univ Karlsruhe, Inst Theoret Teilchenphys, D-76128 Karlsruhe, Germany.
RP Sturm, C (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
EM actis@physik.rwth-aachen.de; giampiero@to.infn.it; sturm@bnl.gov;
uccirati@particle.uni-karlsruhe.de
RI Sturm, Christian/Q-2713-2015
OI Sturm, Christian/0000-0002-3137-4940
FU MIUR [2001023713 _ 006,]; European Community's Marie Curie Research; US
Department of Energy [MRTN-CT-2006-035505]; Deutsche
Forschungsgemeinschaft [DE-AC02-98CH10886]
FX Work supported by MIUR under contract 2001023713 _ 006, by the European
Community's Marie Curie Research Training Network Tools and Precision
Calculations for Physics Discoveries at Colliders under contract
MRTN-CT-2006-035505, by the US Department of Energy under contract No.
DE-AC02-98CH10886 and by the Deutsche Forschungsgemeinschaft through
Sonderforschungsbereich/Transregio 9 Computergestuzte Theoretische
Teilchenphysik.
NR 133
TC 91
Z9 91
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0550-3213
EI 1873-1562
J9 NUCL PHYS B
JI Nucl. Phys. B
PD APR 11
PY 2009
VL 811
IS 1-2
BP 182
EP 273
DI 10.1016/j.nuclphysb.2008.11.024
PG 92
WC Physics, Particles & Fields
SC Physics
GA 405UN
UT WOS:000263249800009
ER
PT J
AU Chandler, E
Hoover, E
Field, J
Sheetz, K
Amir, W
Carriles, R
Ding, SY
Squier, J
AF Chandler, Eric
Hoover, Erich
Field, Jeff
Sheetz, Kraig
Amir, Wafa
Carriles, Ramon
Ding, Shi-you
Squier, Jeff
TI High-resolution mosaic imaging with multifocal, multiphoton
photon-counting microscopy
SO APPLIED OPTICS
LA English
DT Article
ID REAL-TIME; 2-PHOTON; OSCILLATOR; EXCITATION; SINGLE; POWER
AB High-resolution mosaic imaging is performed for the first time to our knowledge with a multifocal, multi-photon, photon-counting imaging system. We present a novel design consisting of a home-built femtosecond Yb-doped KGdWO4 laser with an optical multiplexer, which is coupled with a commercial Olympus IX-71 microscope frame. Photon counting is performed using single-element detectors and an inexpensive electronic demultiplexer and counters. (C) 2009 Optical Society of America
C1 [Chandler, Eric; Hoover, Erich; Field, Jeff; Sheetz, Kraig; Amir, Wafa; Carriles, Ramon; Squier, Jeff] Colorado Sch Mines, Ctr Microintegrated Opt Adv Biol Control, Dept Phys, Golden, CO 80401 USA.
[Ding, Shi-you] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Chandler, E (reprint author), Colorado Sch Mines, Ctr Microintegrated Opt Adv Biol Control, Dept Phys, 1500 Illinois St, Golden, CO 80401 USA.
EM echandle@mines.edu
FU NREL [ZCO-7-77379]
FX This work was supported under NREL subcontract ZCO-7-77379.
Additionally, we would like to thank Professor Martti Kauranen of the
Tampere University of Technology for the loan of the gold nanostructures
used to characterize the beam focus in this study.
NR 20
TC 15
Z9 15
U1 0
U2 7
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD APR 10
PY 2009
VL 48
IS 11
BP 2067
EP 2077
DI 10.1364/AO.48.002067
PG 11
WC Optics
SC Optics
GA 439IE
UT WOS:000265620000013
PM 19363544
ER
PT J
AU Kaib, NA
Becker, AC
Jones, RL
Puckett, AW
Bizyaev, D
Dilday, B
Frieman, JA
Oravetz, DJ
Pan, K
Quinn, T
Schneider, DP
Watters, S
AF Kaib, Nathan A.
Becker, Andrew C.
Jones, R. Lynne
Puckett, Andrew W.
Bizyaev, Dmitry
Dilday, Benjamin
Frieman, Joshua A.
Oravetz, Daniel J.
Pan, Kaike
Quinn, Thomas
Schneider, Donald P.
Watters, Shannon
TI 2006 SQ(372): A LIKELY LONG-PERIOD COMET FROM THE INNER OORT CLOUD
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE comets: general; Kuiper Belt; Oort Cloud
ID DIGITAL SKY SURVEY; JUPITER-FAMILY COMETS; EMBEDDED STAR-CLUSTERS; OUTER
SOLAR-SYSTEM; KUIPER-BELT; GALACTIC ENVIRONMENT; SCATTERED DISK;
PAN-STARRS; ORIGIN; POPULATION
AB We report the discovery of a minor planet (2006 SQ(372)) on an orbit with a perihelion of 24 AU and a semimajor axis of 796 AU. Dynamical simulations show that this is a transient orbit and is unstable on a timescale of similar to 200 Myr. Falling near the upper semimajor axis range of the scattered disk and the lower semimajor axis range of the Oort Cloud, previous membership in either class is possible. By modeling the production of similar orbits from the Oort Cloud as well as from the scattered disk, we find that the Oort Cloud produces 16 times as many objects on SQ(372)-like orbits as the scattered disk. Given this result, we believe this to be the most distant long-period comet (LPC) ever discovered. Furthermore, our simulation results also indicate that 2000 OO67 has had a similar dynamical history. Unaffected by the "Jupiter-Saturn Barrier," these two objects are most likely LPCs from the inner Oort Cloud.
C1 [Kaib, Nathan A.; Becker, Andrew C.; Jones, R. Lynne; Quinn, Thomas] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
[Puckett, Andrew W.] Univ Alaska, Dept Phys & Astron, Anchorage, AK 99508 USA.
[Bizyaev, Dmitry; Oravetz, Daniel J.; Pan, Kaike; Watters, Shannon] Apache Point Observ, Sunspot, NM 88349 USA.
[Dilday, Benjamin] Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
[Dilday, Benjamin; Frieman, Joshua A.] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
[Dilday, Benjamin] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
[Frieman, Joshua A.] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
[Frieman, Joshua A.] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
[Schneider, Donald P.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
RP Kaib, NA (reprint author), Univ Washington, Dept Astron, Box 351580, Seattle, WA 98195 USA.
EM kaib@astro.washington.edu
FU Alfred P. Sloan Foundation; Participating Institutions; National Science
Foundation; U.S. Department of Energy; National Aeronautics and Space
Administration; Japanese Monbukagakusho; Max Planck Society; Higher
Education Funding Council for England; American Museum of Natural
History; Astrophysical Institute Potsdam; University of Basel;
University of Cambridge; Case Western Reserve University; University of
Chicago; Drexel University; Fermilab; Institute for Advanced Study;
Japan Participation Group; Johns Hopkins University; Joint Institute for
Nuclear Astrophysics; Kavli Institute for Particle Astrophysics and
Cosmology; Korean Scientist Group; Chinese Academy of Sciences (LAMOST);
Los Alamos National Laboratory; Max-Planck-Institute for Astronomy
(MPIA); Max-Planck-Institute for Astrophysics (MPA); New Mexico State
University; Ohio State University; University of Pittsburgh; University
of Portsmouth; Princeton University; United States Naval Observatory;
University of Washington
FX We thank the reviewer, Alessandro Morbidelli, for insightful comments
and suggestions that greatly improved the quality of this work. This
research was partially funded by a NASA Earth and Space Science
Fellowship. Most of our computing work was performed using the Purdue
Teragrid computing facilities managed with Condor scheduling software
(see http://www.cs.wisc.edu/condor). Funding for the SDSS and SDSS-II
has been provided by the Alfred P. Sloan Foundation, the Participating
Institutions, the National Science Foundation, the U.S. Department of
Energy, the National Aeronautics and Space Administration, the Japanese
Monbukagakusho, the Max Planck Society, and the Higher Education Funding
Council for England. The SDSS Web site is http://www.sdss.org/. The SDSS
is managed by the Astrophysical Research Consortium for the
Participating Institutions. The Participating Institutions are the
American Museum of Natural History, Astrophysical Institute Potsdam,
University of Basel, University of Cambridge, Case Western Reserve
University, University of Chicago, Drexel University, Fermilab, the
Institute for Advanced Study, the Japan Participation Group, Johns
Hopkins University, the Joint Institute for Nuclear Astrophysics, the
Kavli Institute for Particle Astrophysics and Cosmology, the Korean
Scientist Group, the Chinese Academy of Sciences (LAMOST), Los Alamos
National Laboratory, the Max-Planck-Institute for Astronomy (MPIA), the
Max-Planck-Institute for Astrophysics (MPA), New Mexico State
University, Ohio State University, University of Pittsburgh, University
of Portsmouth, Princeton University, the United States Naval
Observatory, and the University of Washington.
NR 57
TC 13
Z9 13
U1 1
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD APR 10
PY 2009
VL 695
IS 1
BP 268
EP 275
DI 10.1088/0004-637X/695/1/268
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 427KZ
UT WOS:000264779500022
ER
PT J
AU Rubin, D
Linder, EV
Kowalski, M
Aldering, G
Amanullah, R
Barbary, K
Connolly, NV
Dawson, KS
Faccioli, L
Fadeyev, V
Goldhaber, G
Goobar, A
Hook, I
Lidman, C
Meyers, J
Nobili, S
Nugent, PE
Pain, R
Perlmutter, S
Ruiz-Lapuente, P
Spadafora, AL
Strovink, M
Suzuki, N
Swift, H
AF Rubin, D.
Linder, E. V.
Kowalski, M.
Aldering, G.
Amanullah, R.
Barbary, K.
Connolly, N. V.
Dawson, K. S.
Faccioli, L.
Fadeyev, V.
Goldhaber, G.
Goobar, A.
Hook, I.
Lidman, C.
Meyers, J.
Nobili, S.
Nugent, P. E.
Pain, R.
Perlmutter, S.
Ruiz-Lapuente, P.
Spadafora, A. L.
Strovink, M.
Suzuki, N.
Swift, H.
CA Supernova Cosmology Project
TI LOOKING BEYOND LAMBDA WITH THE UNION SUPERNOVA COMPILATION
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE cosmology: observations; cosmology: theory; supernovae: general
ID COSMOLOGICAL CONSTANT; DARK ENERGY; QUINTESSENCE; SPACE
AB The recent robust and homogeneous analysis of the world's supernova distance-redshift data, together with cosmic microwave background and baryon acoustic oscillation data-provides a powerful tool for constraining cosmological models. Here we examine particular classes of scalar field, modified gravity, and phenomenological models to assess whether they are consistent with observations even when their behavior deviates from the cosmological constant Lambda. Some models have tension with the data, while others survive only by approaching the cosmological constant, and a couple are statistically favored over Lambda cold dark matter. Dark energy described by two equation-of-state parameters has considerable phase space to avoid Lambda and next-generation data will be required to constrain such physics, with the level of complementarity between probes varying with cosmology.
C1 [Rubin, D.; Linder, E. V.; Aldering, G.; Amanullah, R.; Barbary, K.; Dawson, K. S.; Faccioli, L.; Goldhaber, G.; Meyers, J.; Nugent, P. E.; Perlmutter, S.; Spadafora, A. L.; Strovink, M.; Suzuki, N.; Swift, H.] EO Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Rubin, D.; Barbary, K.; Goldhaber, G.; Meyers, J.; Perlmutter, S.; Strovink, M.; Swift, H.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Linder, E. V.; Amanullah, R.; Faccioli, L.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Kowalski, M.] Humboldt Univ, Dept Phys, D-12489 Berlin, Germany.
[Connolly, N. V.] Hamilton Coll, Dept Phys, Clinton, NY 13323 USA.
[Fadeyev, V.] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA.
[Goobar, A.; Nobili, S.] Stockholm Univ, Albanova Univ Ctr, Dept Phys, S-10691 Stockholm, Sweden.
[Hook, I.] Univ Oxford, Sub Dept Astrophys, Oxford OX1 3RH, England.
[Lidman, C.] European So Observ, Santiago 19, Chile.
[Pain, R.] Univ Paris 06, CNRS, LPNHE, IN2P3, Paris, France.
[Pain, R.] Univ Paris 07, CNRS, LPNHE, IN2P3, Paris, France.
[Ruiz-Lapuente, P.] Univ Barcelona, Dept Astron, Barcelona, Spain.
RP Rubin, D (reprint author), EO Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
RI Kowalski, Marek/G-5546-2012; Perlmutter, Saul/I-3505-2015;
OI Perlmutter, Saul/0000-0002-4436-4661; Strovink,
Mark/0000-0001-7020-7769; Meyers, Joshua/0000-0002-2308-4230
FU U.S. Department of Energy [DE-AC02-05CH11231]; Deutsche
Forschungsgemeinschaft (DFG)
FX We thank A. Albrecht, R. Caldwell, R. de Putter, S. Weinberg, and C.
Wetterich for helpful discussions. This work has been supported in part
by the Director, Office of Science, Office of High Energy Physics, of
the U.S. Department of Energy under contract no. DE-AC02-05CH11231. M.
K. acknowledges support from the Deutsche Forschungsgemeinschaft (DFG).
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD APR 10
PY 2009
VL 695
IS 1
BP 391
EP 403
DI 10.1088/0004-637X/695/1/391
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 427KZ
UT WOS:000264779500033
ER
PT J
AU Rosswog, S
Ramirez-Ruiz, E
Hix, WR
AF Rosswog, S.
Ramirez-Ruiz, E.
Hix, W. R.
TI TIDAL DISRUPTION AND IGNITION OF WHITE DWARFS BY MODERATELY MASSIVE
BLACK HOLES
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE accretion, accretion disks; black hole physics; globular clusters:
general; hydrodynamics; nuclear reactions, nucleosynthesis, abundances
ID SMOOTHED PARTICLE HYDRODYNAMICS; STELLAR DISRUPTION; NEUTRON-STARS; I
SUPERNOVAE; CLUSTER G1; BINARIES; ENERGY; SAGITTARIUS; COLLISIONS;
EQUATION
AB We present a numerical investigation of the tidal disruption of white dwarfs by moderately massive black holes, with particular reference to the centers of dwarf galaxies and globular clusters. Special attention is given to the fate of white dwarfs of all masses that approach the black hole close enough to be disrupted and severely compressed to such an extent that explosive nuclear burning can be triggered. Consistent modeling of the gas dynamics together with the nuclear reactions allows for a realistic determination of the explosive energy release. In the most favorable cases, the nuclear energy release may be comparable to that of typical Type Ia supernovae. Although the explosion will increase the mass fraction escaping on hyperbolic orbits, a good fraction of the debris remains to be swallowed by the hole, causing a bright soft X-ray flare lasting for about a year. Such transient signatures, if detected, would be a compelling testimony for the presence of a moderately massive black hole (below 10(5) M(circle dot))
C1 [Rosswog, S.] Jacobs Univ Bremen, Sch Sci & Engn, D-28759 Bremen, Germany.
[Ramirez-Ruiz, E.] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
[Hix, W. R.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RP Rosswog, S (reprint author), Jacobs Univ Bremen, Sch Sci & Engn, Campus Ring 1, D-28759 Bremen, Germany.
RI Hix, William/E-7896-2011
OI Hix, William/0000-0002-9481-9126
FU DOE Program for Scientific Discovery through Advanced Computing (SciDAC)
[DE-FC02-01ER41176]; U.S. Department of Energy [DE-AC05-00OR22725]
FX We thank Holger Baumgardt, Peter Goldreich, JimGunn, Piet Hut, Dan
Kasen, Bronson Messer, and Martin Rees for very useful discussions. E.
R. acknowledges support from the DOE Program for Scientific Discovery
through Advanced Computing (SciDAC; DE-FC02-01ER41176). The simulations
presented in this paper were performed on the JUMP computer of the
Hochstleistungsrechenzentrum Julich. Oak Ridge National Laboratory is
managed by UT-Battelle, LLC, for the U.S. Department of Energy under
contract DE-AC05-00OR22725.
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PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD APR 10
PY 2009
VL 695
IS 1
BP 404
EP 419
DI 10.1088/0004-637X/695/1/404
PG 16
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 427KZ
UT WOS:000264779500034
ER
PT J
AU Palmer, DM
AF Palmer, David M.
TI A FAST CHI-SQUARED TECHNIQUE FOR PERIOD SEARCH OF IRREGULARLY SAMPLED
DATA
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE methods: data analysis; methods: numerical; methods: statistical; stars:
oscillations
ID PHOTOMETRY
AB A new, computationally and statistically efficient algorithm, the Fast chi(2) algorithm (F chi(2)), can find a periodic signal with harmonic content in irregularly sampled data with nonuniform errors. The algorithm calculates the minimized chi(2) as a function of frequency at the desired number of harmonics, using fast Fourier transforms to provide O(N logN) performance. The code for a reference implementation is provided.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Palmer, DM (reprint author), Los Alamos Natl Lab, B244, Los Alamos, NM 87545 USA.
EM palmer@lanl.gov
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PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD APR 10
PY 2009
VL 695
IS 1
BP 496
EP 502
DI 10.1088/0004-637X/695/1/496
PG 7
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 427KZ
UT WOS:000264779500042
ER
PT J
AU Horan, D
Acciari, VA
Bradbury, SM
Buckley, JH
Bugaev, V
Byrum, KL
Cannon, A
Celik, O
Cesarini, A
Chow, YCK
Ciupik, L
Cogan, P
Falcone, AD
Fegan, SJ
Finley, JP
Fortin, P
Fortson, LF
Gall, D
Gillanders, GH
Grube, J
Gyuk, G
Hanna, D
Hays, E
Kertzman, M
Kildea, J
Konopelko, A
Krawczynski, H
Krennrich, F
Lang, MJ
Lee, K
Moriarty, P
Nagai, T
Niemiec, J
Ong, RA
Perkins, JS
Pohl, M
Quinn, J
Reynolds, PT
Rose, HJ
Sembroski, GH
Smith, AW
Steele, D
Swordy, SP
Toner, JA
Vassiliev, VV
Wakely, SP
Weekes, TC
White, RJ
Williams, DA
Wood, MD
Zitzer, B
Aller, HD
Aller, MF
Baker, M
Barnaby, D
Carini, MT
Charlot, P
Dumm, JP
Fields, NE
Hovatta, T
Jordan, B
Kovalev, YA
Kovalev, YY
Krimm, HA
Kurtanidze, OM
Lahteenmaki, A
Le Campion, JF
Maune, J
Montaruli, T
Sadun, AC
Smith, S
Tornikoski, M
Turunen, M
Walters, R
AF Horan, D.
Acciari, V. A.
Bradbury, S. M.
Buckley, J. H.
Bugaev, V.
Byrum, K. L.
Cannon, A.
Celik, O.
Cesarini, A.
Chow, Y. C. K.
Ciupik, L.
Cogan, P.
Falcone, A. D.
Fegan, S. J.
Finley, J. P.
Fortin, P.
Fortson, L. F.
Gall, D.
Gillanders, G. H.
Grube, J.
Gyuk, G.
Hanna, D.
Hays, E.
Kertzman, M.
Kildea, J.
Konopelko, A.
Krawczynski, H.
Krennrich, F.
Lang, M. J.
Lee, K.
Moriarty, P.
Nagai, T.
Niemiec, J.
Ong, R. A.
Perkins, J. S.
Pohl, M.
Quinn, J.
Reynolds, P. T.
Rose, H. J.
Sembroski, G. H.
Smith, A. W.
Steele, D.
Swordy, S. P.
Toner, J. A.
Vassiliev, V. V.
Wakely, S. P.
Weekes, T. C.
White, R. J.
Williams, D. A.
Wood, M. D.
Zitzer, B.
Aller, H. D.
Aller, M. F.
Baker, M.
Barnaby, D.
Carini, M. T.
Charlot, P.
Dumm, J. P.
Fields, N. E.
Hovatta, T.
Jordan, B.
Kovalev, Y. A.
Kovalev, Y. Y.
Krimm, H. A.
Kurtanidze, O. M.
Lahteenmaki, A.
Le Campion, J. F.
Maune, J.
Montaruli, T.
Sadun, A. C.
Smith, S.
Tornikoski, M.
Turunen, M.
Walters, R.
TI MULTIWAVELENGTH OBSERVATIONS OF MARKARIAN 421 IN 2005-2006
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE BL Lacertae objects: individual (Markarian 421); gamma rays:
observations; X-rays: individual (Markarian 421)
ID ACTIVE GALACTIC NUCLEI; BL-LACERTAE OBJECTS; GAMMA-RAY EMISSION;
SPECTRAL SLOPE VARIABILITY; TEV BLAZAR MARKARIAN-421; X-RAY; LAC
OBJECTS; CORRELATED VARIABILITY; TIMING EXPLORER; PROTON BLAZAR
AB Since 2005 September, the Whipple 10 m Gamma-ray Telescope has been operated primarily as a blazar monitor. The five northern hemisphere blazars that have already been detected at the Whipple Observatory, Markarian 421 (Mrk 421), H1426+428, Mrk 501, 1ES 1959+650, and 1ES 2344+514, are monitored routinely each night that they are visible. We report on the Mrk 421 observations taken from 2005 November to 2006 June in the gamma-ray, X-ray, optical, and radio bands. During this time, Mrk 421 was found to be variable at all wavelengths probed. Both the variability and the correlations among different energy regimes are studied in detail here. A tentative correlation, with large spread, was measured between the X-ray and gamma-ray bands, while no clear correlation was evident among the other energy bands. In addition to this, the well-sampled spectral energy distribution of Mrk 421 (1101+384) is presented for three different activity levels. The observations of the other blazar targets will be reported separately.
C1 [Horan, D.; Byrum, K. L.; Hays, E.; Smith, A. W.] Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA.
[Acciari, V. A.; Moriarty, P.] Galway Mayo Inst Technol, Dept Phys & Life Sci, Galway, Ireland.
[Acciari, V. A.; Kildea, J.; Perkins, J. S.; Weekes, T. C.] Harvard Smithsonian Ctr Astrophys, Fred Lawrence Whipple Observ, Amado, AZ 85645 USA.
[Bradbury, S. M.; Rose, H. J.; White, R. J.] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England.
[Cannon, A.; Grube, J.; Quinn, J.] Washington Univ, Dept Phys, St Louis, MO 63130 USA.
[Cannon, A.; Grube, J.; Quinn, J.] Univ Coll Dublin, Sch Phys, Dublin 4, Ireland.
[Celik, O.; Chow, Y. C. K.; Fegan, S. J.; Ong, R. A.; Vassiliev, V. V.; Wood, M. D.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
[Cesarini, A.; Gillanders, G. H.; Lang, M. J.; Toner, J. A.] Natl Univ Ireland, Sch Phys, Galway, Ireland.
[Ciupik, L.; Fortson, L. F.; Gyuk, G.; Steele, D.] Adler Planetarium & Astron Museum, Dept Astron, Chicago, IL 60605 USA.
[Cogan, P.; Hanna, D.] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
[Falcone, A. D.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Finley, J. P.; Gall, D.; Sembroski, G. H.; Zitzer, B.] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA.
[Fortin, P.] Columbia Univ, Barnard Coll, Dept Phys & Astron, New York, NY 10027 USA.
[Hays, E.; Swordy, S. P.; Wakely, S. P.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
[Hays, E.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Kertzman, M.] Depauw Univ, Dept Phys & Astron, Greencastle, IN 46135 USA.
[Konopelko, A.] Pittsburg State Univ, Dept Phys, Pittsburg, KS 66762 USA.
[Krennrich, F.; Nagai, T.; Niemiec, J.; Pohl, M.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Niemiec, J.] Inst Fizyki Hadrowej PAN, PL-31342 Krakow, Poland.
[Reynolds, P. T.] Cork Inst Technol, Dept Appl Phys & Instrumentat, Cork, Ireland.
[Williams, D. A.] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA.
[Williams, D. A.] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA.
[Aller, H. D.; Aller, M. F.] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA.
[Baker, M.; Dumm, J. P.; Fields, N. E.; Montaruli, T.] Univ Wisconsin, Madison, WI 53706 USA.
[Barnaby, D.; Carini, M. T.; Maune, J.; Smith, S.; Walters, R.] Western Kentucky Univ, Bowling Green, KY 42104 USA.
[Charlot, P.; Le Campion, J. F.] Univ Bordeaux, Observ Aquitain Sci Univ, F-33271 Floirac, France.
[Charlot, P.; Le Campion, J. F.] CNRS, UMR 5804, Lab Astrophys Bordeaux, F-33271 Floirac, France.
[Hovatta, T.; Lahteenmaki, A.; Tornikoski, M.; Turunen, M.] Helsinki Univ Technol, Metsahovi Radio Observ, Kylmala 02540, Finland.
[Jordan, B.] Dublin Inst Adv Studies, Sch Cosm Phys, Dublin 4, Ireland.
[Kovalev, Y. A.; Kovalev, Y. Y.] Ctr Astro Space, PN Lebedev Phys Inst, Moscow 117997, Russia.
[Kovalev, Y. Y.] Max Planck Inst Radioastron, D-53121 Bonn, Germany.
[Krimm, H. A.] CRESST, Greenbelt, MD 20771 USA.
[Krimm, H. A.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Krimm, H. A.] Univ Space Res Assoc, Columbia, MD 21044 USA.
[Kurtanidze, O. M.] Abastumani Observ, Abastumani, GA USA.
[Sadun, A. C.] Univ Colorado, Dept Phys, Denver, CO 80208 USA.
RP Horan, D (reprint author), Argonne Natl Lab, Div High Energy Phys, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM deirdre.horan@gmail.com
RI Kovalev, Yuri/J-5671-2013; Lahteenmaki, Anne/L-5987-2013; Hays,
Elizabeth/D-3257-2012; Kurtanidze, Omar/J-6237-2014; Kovalev,
Yuri/N-1053-2015
OI Kovalev, Yuri/0000-0001-9303-3263;
NR 61
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PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD APR 10
PY 2009
VL 695
IS 1
BP 596
EP 618
DI 10.1088/0004-637X/695/1/596
PG 23
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 427KZ
UT WOS:000264779500050
ER
PT J
AU Abdo, AA
Ackermann, M
Atwood, WB
Baldini, L
Ballet, J
Barbiellini, G
Baring, MG
Bastieri, D
Baughman, BM
Bechtol, K
Bellazzini, R
Berenji, B
Bloom, ED
Bonamente, E
Borgland, AW
Bregeon, J
Brez, A
Brigida, M
Bruel, P
Burnett, TH
Caliandro, GA
Cameron, RA
Caraveo, PA
Casandjian, JM
Cecchi, C
Charles, E
Chekhtman, A
Cheung, CC
Chiang, J
Ciprini, S
Claus, R
Cohen-Tanugi, J
Cominsky, LR
Conrad, J
Dermer, CD
de Angelis, A
de Palma, F
Digel, SW
Donato, D
Dormody, M
Silva, EDE
Drell, PS
Dubois, R
Dumora, D
Edmonds, Y
Farnier, C
Favuzzi, C
Fleury, P
Focke, WB
Frailis, M
Fukazawa, Y
Funk, S
Fusco, P
Gargano, F
Gasparrini, D
Gehrels, N
Germani, S
Giebels, B
Giglietto, N
Giordano, F
Glanzman, T
Godfrey, G
Grenier, IA
Grondin, MH
Grove, JE
Guillemot, L
Guiriec, S
Harding, AK
Hayashida, M
Hays, E
Hughes, RE
Johannesson, G
Johnson, AS
Johnson, RP
Johnson, TJ
Johnson, WN
Johnston, S
Kamae, T
Katagiri, H
Kataoka, J
Kawai, N
Kerr, M
Knodlseder, J
Komin, N
Kramer, M
Kuehn, F
Kuss, M
Latronico, L
Lee, SH
Lemoine-Goumard, M
Longo, F
Loparco, F
Lott, B
Lovellette, MN
Lubrano, P
Makeev, A
Marelli, M
Mazziotta, MN
McConville, W
McEnery, JE
Meurer, C
Michelson, PF
Mitthumsiri, W
Mizuno, T
Moiseev, AA
Monte, C
Monzani, ME
Morselli, A
Moskalenko, IV
Murgia, S
Nolan, PL
Nuss, E
Ohsugi, T
Omodei, N
Orlando, E
Ormes, JF
Paneque, D
Panetta, JH
Parent, D
Pepe, M
Pesce-Rollins, M
Piron, F
Porter, TA
Raino, S
Rando, R
Razzano, M
Reimer, A
Reimer, O
Reposeur, T
Ritz, S
Rochester, LS
Rodriguez, AY
Romani, RW
Roth, M
Ryde, F
Sadrozinski, HFW
Sanchez, D
Sander, A
Parkinson, PMS
Sgro, C
Siskind, EJ
Smith, DA
Smith, PD
Spandre, G
Spinelli, P
Starck, JL
Strickman, MS
Suson, DJ
Tajima, H
Takahashi, H
Tanaka, T
Thayer, JB
Thayer, JG
Thompson, DJ
Thorsett, SE
Tibaldo, L
Torres, DF
Tosti, G
Tramacere, A
Uchiyama, Y
Usher, TL
Van Etten, A
Vilchez, N
Vitale, V
Waite, AP
Watters, K
Wood, KS
Ylinen, T
Ziegler, M
Hobbs, G
Keith, M
Manchester, RN
Weltevrede, P
AF Abdo, A. A.
Ackermann, M.
Atwood, W. B.
Baldini, L.
Ballet, J.
Barbiellini, G.
Baring, M. G.
Bastieri, D.
Baughman, B. M.
Bechtol, K.
Bellazzini, R.
Berenji, B.
Bloom, E. D.
Bonamente, E.
Borgland, A. W.
Bregeon, J.
Brez, A.
Brigida, M.
Bruel, P.
Burnett, T. H.
Caliandro, G. A.
Cameron, R. A.
Caraveo, P. A.
Casandjian, J. M.
Cecchi, C.
Charles, E.
Chekhtman, A.
Cheung, C. C.
Chiang, J.
Ciprini, S.
Claus, R.
Cohen-Tanugi, J.
Cominsky, L. R.
Conrad, J.
Dermer, C. D.
de Angelis, A.
de Palma, F.
Digel, S. W.
Donato, D.
Dormody, M.
do Couto e Silva, E.
Drell, P. S.
Dubois, R.
Dumora, D.
Edmonds, Y.
Farnier, C.
Favuzzi, C.
Fleury, P.
Focke, W. B.
Frailis, M.
Fukazawa, Y.
Funk, S.
Fusco, P.
Gargano, F.
Gasparrini, D.
Gehrels, N.
Germani, S.
Giebels, B.
Giglietto, N.
Giordano, F.
Glanzman, T.
Godfrey, G.
Grenier, I. A.
Grondin, M. -H.
Grove, J. E.
Guillemot, L.
Guiriec, S.
Harding, A. K.
Hayashida, M.
Hays, E.
Hughes, R. E.
Johannesson, G.
Johnson, A. S.
Johnson, R. P.
Johnson, T. J.
Johnson, W. N.
Johnston, S.
Kamae, T.
Katagiri, H.
Kataoka, J.
Kawai, N.
Kerr, M.
Knoedlseder, J.
Komin, N.
Kramer, M.
Kuehn, F.
Kuss, M.
Latronico, L.
Lee, S. -H.
Lemoine-Goumard, M.
Longo, F.
Loparco, F.
Lott, B.
Lovellette, M. N.
Lubrano, P.
Makeev, A.
Marelli, M.
Mazziotta, M. N.
McConville, W.
McEnery, J. E.
Meurer, C.
Michelson, P. F.
Mitthumsiri, W.
Mizuno, T.
Moiseev, A. A.
Monte, C.
Monzani, M. E.
Morselli, A.
Moskalenko, I. V.
Murgia, S.
Nolan, P. L.
Nuss, E.
Ohsugi, T.
Omodei, N.
Orlando, E.
Ormes, J. F.
Paneque, D.
Panetta, J. H.
Parent, D.
Pepe, M.
Pesce-Rollins, M.
Piron, F.
Porter, T. A.
Raino, S.
Rando, R.
Razzano, M.
Reimer, A.
Reimer, O.
Reposeur, T.
Ritz, S.
Rochester, L. S.
Rodriguez, A. Y.
Romani, R. W.
Roth, M.
Ryde, F.
Sadrozinski, H. F. -W.
Sanchez, D.
Sander, A.
Parkinson, P. M. Saz
Sgro, C.
Siskind, E. J.
Smith, D. A.
Smith, P. D.
Spandre, G.
Spinelli, P.
Starck, J. -L.
Strickman, M. S.
Suson, D. J.
Tajima, H.
Takahashi, H.
Tanaka, T.
Thayer, J. B.
Thayer, J. G.
Thompson, D. J.
Thorsett, S. E.
Tibaldo, L.
Torres, D. F.
Tosti, G.
Tramacere, A.
Uchiyama, Y.
Usher, T. L.
Van Etten, A.
Vilchez, N.
Vitale, V.
Waite, A. P.
Watters, K.
Wood, K. S.
Ylinen, T.
Ziegler, M.
Hobbs, G.
Keith, M.
Manchester, R. N.
Weltevrede, P.
TI DISCOVERY OF PULSED gamma-RAYS FROM THE YOUNG RADIO PULSAR PSR
J1028-5819 WITH THE FERMI LARGE AREA TELESCOPE
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE pulsars: general; stars: neutron
ID TIME-DIFFERENCING TECHNIQUE; SPACE TELESCOPE; RADIATION; EMISSION;
CATALOG; SEARCH; GAPS
AB Radio pulsar PSR J1028-5819 was recently discovered in a high-frequency search (at 3.1 GHz) in the error circle of the Energetic Gamma-Ray Experiment Telescope (EGRET) source 3EG J1027-5817. The spin-down power of this young pulsar is great enough to make it very likely the counterpart for the EGRET source. We report here the discovery of gamma-ray pulsations from PSR J1028-5819 in early observations by the Large Area Telescope (LAT) on the Fermi Gamma-Ray Space Telescope. The gamma-ray light curve shows two sharp peaks having phase separation of 0.460 +/- 0.004, trailing the very narrow radio pulse by 0.200 +/- 0.003 in phase, very similar to that of other known gamma-ray pulsars. The measured gamma-ray flux gives an efficiency for the pulsar of similar to 10-20% (for outer magnetosphere beam models). No evidence of a surrounding pulsar wind nebula is seen in the current Fermi data but limits on associated emission are weak because the source lies in a crowded region with high background emission. However, the improved angular resolution afforded by the LAT enables the disentanglement of the previous COS-B and EGRET source detections into at least two distinct sources, one of which is now identified as PSR J1028-5819.
C1 [Cheung, C. C.; Donato, D.; Gehrels, N.; Harding, A. K.; Hays, E.; Johnson, T. J.; McConville, W.; McEnery, J. E.; Ritz, S.; Thompson, D. J.] NASA, Goddard Space Flight Ctr, CRESST, Greenbelt, MD 20771 USA.
[Abdo, A. A.; Chekhtman, A.; Dermer, C. D.; Grove, J. E.; Johnson, W. N.; Lovellette, M. N.; Makeev, A.; Strickman, M. S.; Wood, K. S.] Naval Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Ackermann, M.; Bechtol, K.; Berenji, B.; Bloom, E. D.; Borgland, A. W.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; Digel, S. W.; do Couto e Silva, E.; Drell, P. S.; Dubois, R.; Edmonds, Y.; Focke, W. B.; Funk, S.; Glanzman, T.; Godfrey, G.; Hayashida, M.; Johannesson, G.; Johnson, A. S.; Kamae, T.; Lee, S. -H.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Nolan, P. L.; Paneque, D.; Panetta, J. H.; Reimer, A.; Reimer, O.; Rochester, L. S.; Romani, R. W.; Tajima, H.; Tanaka, T.; Thayer, J. B.; Thayer, J. G.; Tramacere, A.; Uchiyama, Y.; Usher, T. L.; Van Etten, A.; Waite, A. P.; Watters, K.] Stanford Univ, W W Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, Stanford, CA 94305 USA.
[Ackermann, M.; Bechtol, K.; Berenji, B.; Bloom, E. D.; Borgland, A. W.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; Digel, S. W.; do Couto e Silva, E.; Drell, P. S.; Dubois, R.; Edmonds, Y.; Focke, W. B.; Funk, S.; Glanzman, T.; Godfrey, G.; Hayashida, M.; Johannesson, G.; Johnson, A. S.; Kamae, T.; Lee, S. -H.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Nolan, P. L.; Paneque, D.; Panetta, J. H.; Reimer, A.; Reimer, O.; Rochester, L. S.; Romani, R. W.; Tajima, H.; Tanaka, T.; Thayer, J. B.; Thayer, J. G.; Tramacere, A.; Uchiyama, Y.; Usher, T. L.; Van Etten, A.; Waite, A. P.; Watters, K.] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94305 USA.
[Atwood, W. B.; Dormody, M.; Johnson, R. P.; Porter, T. A.; Sadrozinski, H. F. -W.; Parkinson, P. M. Saz; Thorsett, S. E.; Ziegler, M.] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Dept Phys, Santa Cruz, CA 95064 USA.
[Atwood, W. B.; Dormody, M.; Johnson, R. P.; Porter, T. A.; Sadrozinski, H. F. -W.; Parkinson, P. M. Saz; Thorsett, S. E.; Ziegler, M.] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
[Baldini, L.; Bellazzini, R.; Bregeon, J.; Brez, A.; Kuss, M.; Latronico, L.; Omodei, N.; Pesce-Rollins, M.; Razzano, M.; Sgro, C.; Spandre, G.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
[Ballet, J.; Casandjian, J. M.; Grenier, I. A.; Komin, N.; Starck, J. -L.] Univ Paris, CEA Saclay, Serv Astrophys, Lab AIM,CEA,IRFU,CNRS, F-91191 Gif Sur Yvette, France.
[Barbiellini, G.; Longo, F.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
[Barbiellini, G.; Longo, F.] Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy.
[Baring, M. G.] Rice Univ, Dept Phys & Astron, Houston, TX 77251 USA.
[Bastieri, D.; Rando, R.; Tibaldo, L.] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
[Bastieri, D.; Rando, R.; Tibaldo, L.] Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
[Baughman, B. M.; Hughes, R. E.; Kuehn, F.; Sander, A.; Smith, P. D.] Ohio State Univ, Dept Phys, Ctr Cosmol & Astro Particle Phys, Columbus, OH 43210 USA.
[Bonamente, E.; Cecchi, C.; Ciprini, S.; Germani, S.; Lubrano, P.; Pepe, M.; Tosti, G.] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy.
[Bonamente, E.; Cecchi, C.; Ciprini, S.; Germani, S.; Lubrano, P.; Pepe, M.; Tosti, G.] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy.
[Brigida, M.; Caliandro, G. A.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Univ Politecn Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy.
[Brigida, M.; Caliandro, G. A.; de Palma, F.; Favuzzi, C.; Fusco, P.; Gargano, F.; Giglietto, N.; Giordano, F.; Loparco, F.; Mazziotta, M. N.; Monte, C.; Raino, S.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
[Bruel, P.; Fleury, P.; Giebels, B.; Sanchez, D.] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
[Burnett, T. H.; Kerr, M.; Roth, M.] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
[Caraveo, P. A.; Marelli, M.] INAF Ist Astrofis Spaziale & Fis Cosm, I-20133 Milan, Italy.
[Chekhtman, A.; Makeev, A.] George Mason Univ, Fairfax, VA 22030 USA.
[Cohen-Tanugi, J.; Farnier, C.; Guiriec, S.; Komin, N.; Nuss, E.; Piron, F.] Univ Montpellier 2, CNRS, IN2P3, Lab Phys Theor & Astroparticules, Montpellier, France.
[Cominsky, L. R.] Sonoma State Univ, Dept Phys & Astron, Rohnert Pk, CA 94928 USA.
[Conrad, J.; Meurer, C.; Ryde, F.; Ylinen, T.] Oskar Klein Ctr Cosmo Particle Phys, SE-10691 Stockholm, Sweden.
[Conrad, J.; Ryde, F.; Ylinen, T.] Royal Inst Technol, Dept Phys, KTH, SE-10691 Stockholm, Sweden.
[Conrad, J.; Meurer, C.] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden.
[de Angelis, A.; Frailis, M.] Univ Udine, Dipartimento Fis, I-33100 Udine, Italy.
[de Angelis, A.; Frailis, M.] Ist Nazl Fis Nucl, Sez Trieste, Grp Collegato Udine, I-33100 Udine, Italy.
[Dumora, D.; Grondin, M. -H.; Guillemot, L.; Lemoine-Goumard, M.; Lott, B.; Parent, D.; Reposeur, T.; Smith, D. A.] CEN Bordeaux Gradignan, CNRS, IN2P3, UMR 5797, F-33175 Gradignan, France.
[Dumora, D.; Grondin, M. -H.; Guillemot, L.; Lemoine-Goumard, M.; Lott, B.; Parent, D.; Reposeur, T.; Smith, D. A.] Univ Bordeaux, CEN Bordeaux Gradignan, UMR 5797, F-33175 Gradignan, France.
[Fukazawa, Y.; Katagiri, H.; Mizuno, T.; Ohsugi, T.; Takahashi, H.] Hiroshima Univ, Dept Phys Sci, Higashihiroshima 7398526, Japan.
[Fukazawa, Y.; Katagiri, H.; Mizuno, T.; Ohsugi, T.; Takahashi, H.] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Higashihiroshima 7398526, Japan.
[Gasparrini, D.] ASI, Sci Data Ctr, I-00044 Frascati, Roma, Italy.
[Gehrels, N.; Johnson, T. J.; Ritz, S.] Univ Maryland, College Pk, MD 20742 USA.
[Johnston, S.; Hobbs, G.; Keith, M.; Manchester, R. N.; Weltevrede, P.] CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, Australia.
[Kataoka, J.; Kawai, N.] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan.
[Kawai, N.] RIKEN, Inst Phys & Chem Res, Cosm Radiat Lab, Wako, Saitama 3510198, Japan.
[Knoedlseder, J.; Vilchez, N.] CNR, SUPS 47, Ctr Etud Spatiale Rayonnements, F-31028 Toulouse 4, France.
[Kramer, M.] Univ Manchester, Jodrell Bank, Ctr Astrophys, Manchester M13 9PL, Lancs, England.
[Morselli, A.; Vitale, V.] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy.
[Orlando, E.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Ormes, J. F.] Univ Denver, Dept Phys & Astron, Denver, CO 80208 USA.
[Rodriguez, A. Y.; Torres, D. F.] CSIC, IEEC, Inst Ciencies Espai, Barcelona 08193, Spain.
[Siskind, E. J.] NYCB Real Time Comp Inc, Lattingtown, NY 11560 USA.
[Suson, D. J.] Purdue Univ Calumet, Dept Chem & Phys, Hammond, IN 46323 USA.
[Torres, D. F.] ICREA, Barcelona, Spain.
[Tramacere, A.] CIFS, I-10133 Turin, Italy.
[Vitale, V.] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy.
[Ylinen, T.] Univ Kalmar, Sch Pure & Appl Nat Sci, SE-39182 Kalmar, Sweden.
RP Harding, AK (reprint author), NASA, Goddard Space Flight Ctr, CRESST, Greenbelt, MD 20771 USA.
EM ahardingx@yahoo.com; Tyrel.J.Johnson@nasa.gov
RI Hays, Elizabeth/D-3257-2012; Johnson, Neil/G-3309-2014; Reimer,
Olaf/A-3117-2013; Funk, Stefan/B-7629-2015; Johannesson,
Gudlaugur/O-8741-2015; Gargano, Fabio/O-8934-2015; Loparco,
Francesco/O-8847-2015; Moskalenko, Igor/A-1301-2007; Mazziotta, Mario
/O-8867-2015; Sgro, Carmelo/K-3395-2016; Torres, Diego/O-9422-2016;
Orlando, E/R-5594-2016; giglietto, nicola/I-8951-2012; Morselli,
Aldo/G-6769-2011; Tosti, Gino/E-9976-2013; Rando, Riccardo/M-7179-2013;
Nolan, Patrick/A-5582-2009; De Angelis, Alessandro/B-5372-2009; Starck,
Jean-Luc/D-9467-2011; Thompson, David/D-2939-2012; Harding,
Alice/D-3160-2012; Gehrels, Neil/D-2971-2012; McEnery,
Julie/D-6612-2012; Baldini, Luca/E-5396-2012; lubrano,
pasquale/F-7269-2012; Kuss, Michael/H-8959-2012; Komin,
Nukri/J-6781-2015
OI Reimer, Olaf/0000-0001-6953-1385; Funk, Stefan/0000-0002-2012-0080;
Johannesson, Gudlaugur/0000-0003-1458-7036; Gargano,
Fabio/0000-0002-5055-6395; Loparco, Francesco/0000-0002-1173-5673;
Moskalenko, Igor/0000-0001-6141-458X; Mazziotta, Mario
/0000-0001-9325-4672; Torres, Diego/0000-0002-1522-9065; Rando,
Riccardo/0000-0001-6992-818X; Sgro', Carmelo/0000-0001-5676-6214;
giglietto, nicola/0000-0002-9021-2888; Morselli,
Aldo/0000-0002-7704-9553; Starck, Jean-Luc/0000-0003-2177-7794;
Thompson, David/0000-0001-5217-9135; lubrano,
pasquale/0000-0003-0221-4806; Giordano, Francesco/0000-0002-8651-2394;
Thorsett, Stephen/0000-0002-2025-9613; SPINELLI,
Paolo/0000-0001-6688-8864; De Angelis, Alessandro/0000-0002-3288-2517;
Frailis, Marco/0000-0002-7400-2135; Caraveo,
Patrizia/0000-0003-2478-8018; Komin, Nukri/0000-0003-3280-0582
FU Istituto Nazionale di Astrofisica in Italy; K. A. Wallenberg Foundation
in Sweden
FX Additional support for science analysis during the operations phase from
the following agencies is also gratefully acknowledged: the Istituto
Nazionale di Astrofisica in Italy and the K. A. Wallenberg Foundation in
Sweden for providing a grant in support of a Royal Swedish Academy of
Sciences Research fellowship for J.C.; The Parkes radio telescope is
part of the Australia Telescope which is funded by the Commonwealth of
Australia for operation as a National Facility managed by the CSIRO.
NR 26
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U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
EI 2041-8213
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD APR 10
PY 2009
VL 695
IS 1
BP L72
EP L77
DI 10.1088/0004-637X/695/1/L72
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 424BE
UT WOS:000264539700016
ER
PT J
AU Mostepanenko, VM
Decca, RS
Fischbach, E
Geyer, B
Klimchitskaya, GL
Krause, DE
Lopez, D
Mohideen, U
AF Mostepanenko, V. M.
Decca, R. S.
Fischbach, E.
Geyer, B.
Klimchitskaya, G. L.
Krause, D. E.
Lopez, D.
Mohideen, U.
TI WHY SCREENING EFFECTS DO NOT INFLUENCE THE CASIMIR FORCE
SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A
LA English
DT Article; Proceedings Paper
CT 7th Alexander Friedmann International Seminar on Gravitations and
Cosmology/Satellite Symposium on 60 Years of the Casimir Efffect
CY JUN 30-JUL 04, 2008
CL Fed Univ Paraiba, Joao Pessoa, BRAZIL
HO Fed Univ Paraiba
DE Casimir force; screening effects; Nernst's heat theorem
ID CONSTRAINTS
AB The Lifshitz theory of dispersion forces leads to thermodynamic and experimental inconsistencies when the role of drifting charge carriers is included in the model of the dielectric response. Recently modified reflection coefficients were suggested that take into account screening effects and diffusion currents. We demonstrate that this theoretical approach leads to a violation of the third law of thermodynamics (Nernst's heat theorem) for a wide class of materials and is excluded by the data from two recent experiments. The physical reason for its failure is explained by the violation of thermal equilibrium, which is the fundamental applicability condition of the Lifshitz theory, in the presence of drift and diffusion currents.
C1 [Mostepanenko, V. M.; Geyer, B.; Klimchitskaya, G. L.] Univ Leipzig, Inst Theoret Phys, D-04009 Leipzig, Germany.
[Decca, R. S.] Indiana Univ Purdue Univ, Dept Phys, Indianapolis, IN 46202 USA.
[Fischbach, E.] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA.
[Krause, D. E.] Wabash Coll, Dept Phys, Crawfordsville, IN 47933 USA.
[Lopez, D.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
[Mohideen, U.] Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA.
RP Mostepanenko, VM (reprint author), Univ Leipzig, Inst Theoret Phys, D-04009 Leipzig, Germany.
EM Vladimir.Mostepanenko@itp.uni-leipzig.de
RI Krause, Dennis/O-3170-2013
NR 49
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U1 1
U2 7
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0217-751X
J9 INT J MOD PHYS A
JI Int. J. Mod. Phys. A
PD APR 10
PY 2009
VL 24
IS 8-9
BP 1721
EP 1742
PG 22
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 431VP
UT WOS:000265092600050
ER
PT J
AU Decca, RS
Lopez, D
AF Decca, Ricardo S.
Lopez, Daniel
TI MEASUREMENT OF THE CASIMIR FORCE USING A MICROMECHANICAL TORSIONAL
OSCILLATOR: ELECTROSTATIC CALIBRATION
SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A
LA English
DT Article; Proceedings Paper
CT 7th Alexander Friedmann International Seminar on Gravitations and
Cosmology/Satellite Symposium on 60 Years of the Casimir Efffect
CY JUN 30-JUL 04, 2008
CL Fed Univ Paraiba, Joao Pessoa, BRAZIL
HO Fed Univ Paraiba
DE Casimir force; precision measurements; electrostatic calibration
ID CONSTRAINTS; RANGE
AB Experimental procedures associated with the electrostatic calibration of a microelectromechanical torsional oscillator are reported. These calibration s are required for the precision measurements of the Casimir force between a Au-coated sapphire sphere and a Au-coated polysilicon plate. It is shown that the electrostatic force between the surfaces is made zero by the application of a potential difference V(o) between the sphere and the plate. Vo is found to be independent of position and separation within the experimental error.
C1 [Decca, Ricardo S.] Indiana Univ Purdue Univ, Dept Phys, Indianapolis, IN 46202 USA.
[Lopez, Daniel] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Decca, RS (reprint author), Indiana Univ Purdue Univ, Dept Phys, Indianapolis, IN 46202 USA.
EM rdecca@iupui.edu; dlopez@cnm.anl.gov
NR 26
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U1 0
U2 0
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0217-751X
J9 INT J MOD PHYS A
JI Int. J. Mod. Phys. A
PD APR 10
PY 2009
VL 24
IS 8-9
BP 1748
EP 1756
PG 9
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 431VP
UT WOS:000265092600052
ER
PT J
AU Abia, JA
Mriziq, KS
Guiochon, GA
AF Abia, Jude A.
Mriziq, Khaled S.
Guiochon, Georges A.
TI Radial heterogeneity of some analytical columns used in high-performance
liquid chromatography
SO JOURNAL OF CHROMATOGRAPHY A
LA English
DT Article
DE Radial heterogeneity; Column efficiency; Electrochemical microdetector
ID MONOLITHIC COLUMNS; HIGH-EFFICIENCY; HPLC; BEDS; FLOW; HOMOGENEITY;
ELECTRODES; DISPERSION; PARTICLES; MECHANICS
AB An on-column electrochemical rnicrodetector was used to determine accurately the radial distribution of the mobile phase velocity and of the column efficiency at the exit of three common analytical columns, namely a 100 mm x 4.6 mm C18 bonded silica-based monolithic column, a 150 mm x 4.6 mm column packed with 2.7 mu m porous shell particles of C18 bonded silica (HALO), and a 150 mm x 4.6 mm column packed with 3 mu m fully porous C18 bonded silica particles (LUNA). The results obtained demonstrate that all three columns are not radially homogeneous. In all three cases, the efficiency was found to be lower in the wall region of the column than in its core region (the central core with a radius of 1/3 the column inner radius). The decrease in local efficiency from the core to the wall regions was lower in the case of the monolith (ca. 25%) than in that of the two particle-packed columns (ca. 35-50%). The mobile phase velocity was found to be ca. 1.5% higher in the wall than in the core region of the monolithic column while, in contrast, it was ca. 2.5-4.0% lower in the wall region for the two particle-packed columns. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Abia, Jude A.; Mriziq, Khaled S.; Guiochon, Georges A.] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
[Abia, Jude A.; Mriziq, Khaled S.; Guiochon, Georges A.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Guiochon, GA (reprint author), Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
EM guiochon@utk.edu
FU United States Department of Energy [DE-FG05-88-ER13869]; University of
Tennessee; Oak Ridge National Laboratory
FX This work was supported in part by Grant DE-FG05-88-ER13869 of the
United States Department of Energy and by the collaborative agreement
between the University of Tennessee and Oak Ridge National Laboratory.
We thank Karen Cabrera (Merck, Darmstadt, Germany) for the generous gift
of the analytical and semi-preparative monolithic columns, Jack Kirkland
(Advanced Materials Technology, Wilmington, DE, USA) for the generous
gift of HALO columns, and Tivadar Farkas (Phenomenex, Torrance, CA, USA)
for the generous gift of LUNA columns.
NR 27
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U1 1
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0021-9673
EI 1873-3778
J9 J CHROMATOGR A
JI J. Chromatogr. A
PD APR 10
PY 2009
VL 1216
IS 15
BP 3185
EP 3191
DI 10.1016/j.chroma.2009.02.034
PG 7
WC Biochemical Research Methods; Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA 432UM
UT WOS:000265159700029
PM 19268295
ER
PT J
AU Krenkova, J
Lacher, NA
Svec, F
AF Krenkova, Jana
Lacher, Nathan A.
Svec, Frantisek
TI Multidimensional system enabling deglycosylation of proteins using a
capillary reactor with peptide-N-glycosidase F immobilized on a porous
polymer monolith and hydrophilic interaction liquid chromatography-mass
spectrometry of glycans
SO JOURNAL OF CHROMATOGRAPHY A
LA English
DT Article
DE Enzyme reactor; Immobilization; Monolith; Immunoglobulin; PNGase F;
Glycomics
ID THERAPEUTIC ANTIBODIES; GLYCOSYLATION; GLYCOPROTEINS; SEPARATION;
OLIGOSACCHARIDES
AB A reactor with immobilized peptide-N-glycosidase F on a monolithic polymer support in a capillary has been developed that allows fast and efficient release of N-linked glycans from immunoglobulin G molecules. Two different monolithic scaffolds based on poly(glycidyl methacrylate-co-ethylene dimethacrylate) and poly(butyl methacrylate-co-ethylene dimethacrylate) were prepared. A multistep photografting process was used to reduce non-specific adsorption of proteins and to obtain support containing reactive azlactone functionalities enabling the preparation of highly active immobilized peptide-N-glycosidase F. Performance of these reactors was determined through glycan release from several glycoproteins including ribonuclease B, chicken albumin, and human immunoglobulin G and their detection by matrix-assisted laser desorption-ionization/time-of-flight mass spectrometry. The optimized reactor was integrated into a multidimensional system comprising on-line glycan release and their separation via hydrophilic interaction liquid chromatography followed by electrospray ionization/time-of-flight mass spectrometry detection. Using the optimized monolithic reactor with immobilized peptide-N-glycosidase F, human immunoglobulin G was deglycosylated at room temperature in 5.5 min to an extent similar to that achieved with soluble enzyme after 24 h at 37 degrees C. (C) 2009 Elsevier B.V. All rights reserved.
C1 [Krenkova, Jana; Svec, Frantisek] EO Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Lacher, Nathan A.] Pfizer Global Biol, Analyt Res & Dev, St Louis, MO 63017 USA.
RP Svec, F (reprint author), EO Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
EM fsvec@lbl.gov
RI xiaorong, yang/B-9548-2009
FU US Department of Energy [DE-AC02-05CH11231]; Pfizer Inc.
FX This work was supported by the Director, Office of Science, Office of
Basic Energy Sciences, Materials Sciences and Engineering Division, of
the US Department of Energy under contract No. DE-AC02-05CH11231.
Support of J.K. by Pfizer Inc. is gratefully acknowledged.
NR 26
TC 41
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U1 2
U2 28
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0021-9673
J9 J CHROMATOGR A
JI J. Chromatogr. A
PD APR 10
PY 2009
VL 1216
IS 15
BP 3252
EP 3259
DI 10.1016/j.chroma.2009.02.036
PG 8
WC Biochemical Research Methods; Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA 432UM
UT WOS:000265159700037
PM 19268959
ER
PT J
AU Lu, GP
DePaolo, DJ
Kang, QJ
Zhang, DX
AF Lu, Guoping
DePaolo, Donald J.
Kang, Qinjun
Zhang, Dongxiao
TI Lattice Boltzmann simulation of snow crystal growth in clouds
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID SNOWFLAKE FORMATION; BACTERIAL COLONIES; ICE CRYSTALS; FLUID-FLOWS;
PRECIPITATION; MODELS
AB The Lattice Boltzmann (LB) method can be used to simulate aspects of chemical reactions such as mineral precipitation from a fluid phase or condensation from a vapor phase. The LB method has the advantage of allowing the shape of the condensing phase to evolve depending on local conditions rather than being specified, so that the controls on condensed phase grain shape can be studied simultaneously with the controls on chemical composition and growth rate. We have used the LB approach to simulate the growth of ice crystals from water vapor-oversaturated air as a first step in developing methods for treating more complex chemical reaction problems, including isotopic effects. The formation of ice crystals (i.e., snow) in air is a classic problem in diffusion-limited crystal growth. There are many complexities, but the process is attractive for modeling purposes because it involves only one chemical component and there is abundant information on reaction kinetics and the relationships between crystal morphology and growth conditions. In this paper we describe the LB approach used, and address strategies for properly conserving mass at a surface of a growing "crystal," the scaling of the calculations to the actual physical problem, and the conditions for growth of dendritic versus compact crystals.
C1 [Lu, Guoping; DePaolo, Donald J.] Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
[DePaolo, Donald J.] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
[Kang, Qinjun] Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
[Zhang, Dongxiao] Univ So Calif, Dept Civil & Environm Engn, Los Angeles, CA 90089 USA.
RP Lu, GP (reprint author), Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
EM guopinglu@yahoo.com
RI Zhang, Dongxiao/D-5289-2009; Kang, Qinjun/A-2585-2010
OI Zhang, Dongxiao/0000-0001-6930-5994; Kang, Qinjun/0000-0002-4754-2240
FU Office of Science, Basic Energy Sciences, Chemical Sciences, Geosciences
and Biosciences Division of the U. S. Department of Energy
[DE-AC02-05CH11231]
FX This work was initiated with support from the LDRD fund from Lawrence
Berkeley National Laboratory and continued with support from the
Director, Office of Science, Basic Energy Sciences, Chemical Sciences,
Geosciences and Biosciences Division of the U. S. Department of Energy
under contract DE-AC02-05CH11231. The authors would like to thank Daniel
Hawkes for editing help, Marilyn Saarni for graphic aid, Benjamin
Gilbert for helpful discussion, Carl Steefel for internal review, and
peered reviews of two anonymous reviewers and Editor Steve Ghan.
NR 37
TC 6
Z9 6
U1 2
U2 10
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
EI 2169-8996
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD APR 10
PY 2009
VL 114
AR D07305
DI 10.1029/2008JD011087
PG 14
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 431ZA
UT WOS:000265102100005
ER
PT J
AU Khare, A
Dmitriev, SV
Saxena, A
AF Khare, Avinash
Dmitriev, Sergey V.
Saxena, Avadh
TI Exact static solutions of a generalized discrete phi(4) model including
short-periodic solutions
SO JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
LA English
DT Article
ID NONLINEAR SCHRODINGER-EQUATION; KLEIN-GORDON MODELS; STATIONARY
SOLUTIONS; ANHARMONIC LATTICES; DISCRETIZATIONS; KINKS; SYSTEM;
MAPPINGS; DYNAMICS; CHAINS
AB We carry out a comprehensive analysis of a generalized discrete phi(4) model, of which virtually all phi(4) models discussed in the literature are particular cases. For this model we construct the exact solutions in the form of the basic Jacobi elliptic, hyperbolic and sine functions, and also give a list of short-periodic and even aperiodic solutions. Some of those solutions coincide with the known ones, others generalize the existing solutions and the rest of them are new. We then discuss the relation between the models supporting exact static solutions and the two-point maps. In particular, we show that some of the short-periodic and sine solutions can be found from factorized difference equations and even from a set of two difference equations, one of the first and another of the second order. Particular attention is paid to the discussion of the exceptional discrete (ED) models defined as models supporting the translationally invariant (TI) static solutions that can be placed arbitrarily with respect to the lattice. We show that some of the derived short-periodic solutions are TI ones while the others are not. For the TI static solutions we demonstrate the existence of the translational Goldstone mode for any location of the solution with respect to the lattice. We then analyze numerically the stability and other properties of the TI kink solutions. In conclusion, we divide the ED models into two classes: the ED I models support a two-parameter set of TI static solutions, while the ED II models support only a one-parameter set of such solutions.
C1 [Khare, Avinash] Inst Phys, Bhubaneswar 751005, Orissa, India.
[Dmitriev, Sergey V.] Russian Acad Sci, Inst Met Superplast Problems, Ufa 450001, Russia.
[Saxena, Avadh] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
[Saxena, Avadh] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Khare, A (reprint author), Inst Phys, Bhubaneswar 751005, Orissa, India.
FU DST-RFBR [08-02-91316-Ind-a]; Russian Foundation for Basic Research
[07-08-12152]; US Department of Energy
FX AK and SVD gratefully acknowledge the financial support provided by the
DST-RFBR joint grant 08-02-91316-Ind-a. The work of SVD was supported by
the Russian Foundation for Basic Research, grant 07-08-12152. This work
was supported in part by the US Department of Energy.
NR 41
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U1 0
U2 4
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1751-8113
EI 1751-8121
J9 J PHYS A-MATH THEOR
JI J. Phys. A-Math. Theor.
PD APR 10
PY 2009
VL 42
IS 14
AR 145204
DI 10.1088/1751-8113/42/14/145204
PG 23
WC Physics, Multidisciplinary; Physics, Mathematical
SC Physics
GA 420LW
UT WOS:000264292300007
ER
PT J
AU Alver, B
Back, BB
Baker, MD
Ballintijn, M
Barton, DS
Betts, RR
Bindel, R
Busza, W
Chai, Z
Chetluru, V
Garcia, E
Gburek, T
Gulbrandsen, K
Hamblen, J
Harnarine, I
Henderson, C
Hofman, DJ
Hollis, RS
Holynski, R
Holzman, B
Iordanova, A
Kane, JL
Kulinich, P
Kuo, CM
Li, W
Lin, WT
Loizides, C
Manly, S
Mignerey, AC
Nouicer, R
Olszewski, A
Pak, R
Reed, C
Richardson, E
Roland, C
Roland, G
Sagerer, J
Sedykh, I
Smith, CE
Stankiewicz, MA
Steinberg, P
Stephans, GSF
Sukhanov, A
Szostak, A
Tonjes, MB
Trzupek, A
Van Nieuwenhuizen, GJ
Vaurynovich, SS
Verdier, R
Veres, GI
Walters, P
Wenger, E
Willhelm, D
Wolfs, FLH
Wosiek, B
Wozniak, K
Wyngaardt, S
Wyslouch, B
AF Alver, B.
Back, B. B.
Baker, M. D.
Ballintijn, M.
Barton, D. S.
Betts, R. R.
Bindel, R.
Busza, W.
Chai, Z.
Chetluru, V.
Garcia, E.
Gburek, T.
Gulbrandsen, K.
Hamblen, J.
Harnarine, I.
Henderson, C.
Hofman, D. J.
Hollis, R. S.
Holynski, R.
Holzman, B.
Iordanova, A.
Kane, J. L.
Kulinich, P.
Kuo, C. M.
Li, W.
Lin, W. T.
Loizides, C.
Manly, S.
Mignerey, A. C.
Nouicer, R.
Olszewski, A.
Pak, R.
Reed, C.
Richardson, E.
Roland, C.
Roland, G.
Sagerer, J.
Sedykh, I.
Smith, C. E.
Stankiewicz, M. A.
Steinberg, P.
Stephans, G. S. F.
Sukhanov, A.
Szostak, A.
Tonjes, M. B.
Trzupek, A.
van Nieuwenhuizen, G. J.
Vaurynovich, S. S.
Verdier, R.
Veres, G. I.
Walters, P.
Wenger, E.
Willhelm, D.
Wolfs, F. L. H.
Wosiek, B.
Wozniak, K.
Wyngaardt, S.
Wyslouch, B.
CA PHOBOS Collaboration
TI System Size, Energy, and Centrality Dependence of Pseudorapidity
Distributions of Charged Particles in Relativistic Heavy-Ion Collisions
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
AB We present the first measurements of the pseudorapidity distribution of primary charged particles in Cu+Cu collisions as a function of collision centrality and energy, s(NN)>=22.4, 62.4, and 200 GeV, over a wide range of pseudorapidity, using the PHOBOS detector. A comparison of Cu+Cu and Au+Au results shows that the total number of produced charged particles and the rough shape (height and width) of the pseudorapidity distributions are determined by the number of nucleon participants. More detailed studies reveal that a more precise matching of the shape of the Cu+Cu and Au+Au pseudorapidity distributions over the full range of pseudorapidity occurs for the same N(part)/2A rather than the same N(part). In other words, it is the collision geometry rather than just the number of nucleon participants that drives the detailed shape of the pseudorapidity distribution and its centrality dependence at RHIC energies.
C1 [Alver, B.; Back, B. B.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Baker, M. D.; Barton, D. S.; Chai, Z.; Holzman, B.; Nouicer, R.; Pak, R.; Sedykh, I.; Stankiewicz, M. A.; Steinberg, P.; Sukhanov, A.; Szostak, A.; Wyngaardt, S.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Gburek, T.; Holynski, R.; Olszewski, A.; Trzupek, A.; Wosiek, B.; Wozniak, K.] PAN, Inst Nucl Phys, Krakow, Poland.
[Ballintijn, M.; Gulbrandsen, K.; Henderson, C.; Kane, J. L.; Kulinich, P.; Li, W.; Loizides, C.; Roland, C.; Roland, G.; Stephans, G. S. F.; van Nieuwenhuizen, G. J.; Vaurynovich, S. S.; Verdier, R.; Veres, G. I.; Wenger, E.; Wyslouch, B.] MIT, Cambridge, MA 02139 USA.
[Kuo, C. M.; Lin, W. T.] Natl Cent Univ, Chungli 32054, Taiwan.
[Betts, R. R.; Chetluru, V.; Garcia, E.; Harnarine, I.; Hofman, D. J.; Hollis, R. S.; Iordanova, A.; Smith, C. E.] Univ Illinois, Chicago, IL 60607 USA.
[Bindel, R.; Mignerey, A. C.; Richardson, E.; Tonjes, M. B.; Willhelm, D.] Univ Maryland, College Pk, MD 20742 USA.
[Hamblen, J.; Manly, S.; Walters, P.; Wolfs, F. L. H.] Univ Rochester, Rochester, NY 14627 USA.
RP Alver, B (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Mignerey, Alice/D-6623-2011;
OI Holzman, Burt/0000-0001-5235-6314
FU U.S. DOE [DE-AC02-98CH10886, DE-FG02-93ER40802, DE-FG02-94ER40818,
DE-FG02-94ER40865, DE-FG02-99ER41099, DE-AC0206CH11357]; U.S. NSF
[9603486, 0072204, 0245011]; Polish MNiSW [NN202 282234]; NSC of Taiwan
[NSC 89-2112-M-008-024]; Hungarian OTKA [F 049823]
FX This work was partially supported by U.S. DOE grants No.
DE-AC02-98CH10886, No. DE-FG02-93ER40802, No. DE-FG02-94ER40818, No.
DE-FG02-94ER40865, No. DE-FG02-99ER41099, and No. DE-AC0206CH11357, by
U.S. NSF Grants No. 9603486, No. 0072204, and No. 0245011, by Polish
MNiSW Grant No. NN202 282234 (2008-2010), by NSC of Taiwan Contract NSC
89-2112-M-008-024, and by Hungarian OTKA Grant (No. F 049823).
NR 11
TC 26
Z9 27
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 10
PY 2009
VL 102
IS 14
AR 142301
DI 10.1103/PhysRevLett.102.142301
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 431SA
UT WOS:000265082500014
PM 19392428
ER
PT J
AU Aubert, B
Karyotakis, Y
Lees, JP
Poireau, V
Prencipe, E
Prudent, X
Tisserand, V
Tico, JG
Grauges, E
Lopez, L
Palano, A
Pappagallo, M
Eigen, G
Stugu, B
Sun, L
Battaglia, M
Brown, DN
Kerth, LT
Kolomensky, YG
Lynch, G
Osipenkov, IL
Tackmann, K
Tanabe, T
Hawkes, CM
Soni, N
Watson, AT
Koch, H
Schroeder, T
Asgeirsson, DJ
Fulsom, BG
Hearty, C
Mattison, TS
McKenna, JA
Barrett, M
Khan, A
Randle-Conde, A
Blinov, VE
Bukin, AD
Buzykaev, AR
Druzhinin, VP
Golubev, VB
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Todyshev, KY
Bondioli, M
Curry, S
Eschrich, I
Kirkby, D
Lankford, AJ
Lund, P
Mandelkern, M
Martin, EC
Stoker, DP
Abachi, S
Buchanan, C
Atmacan, H
Gary, JW
Liu, F
Long, O
Vitug, GM
Yasin, Z
Zhang, L
Sharma, V
Campagnari, C
Hong, TM
Kovalskyi, D
Mazur, MA
Richman, JD
Beck, TW
Eisner, AM
Heusch, CA
Kroseberg, J
Lockman, WS
Martinez, AJ
Schalk, T
Schumm, BA
Seiden, A
Winstrom, LO
Cheng, CH
Doll, DA
Echenard, B
Fang, F
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Andreassen, R
Mancinelli, G
Meadows, BT
Mishra, K
Sokoloff, MD
Bloom, PC
Ford, WT
Gaz, A
Hirschauer, JF
Nagel, M
Nauenberg, U
Smith, JG
Wagner, SR
Ayad, R
Soffer, A
Toki, WH
Wilson, RJ
Feltresi, E
Hauke, A
Jasper, H
Karbach, M
Merkel, J
Petzold, A
Spaan, B
Wacker, K
Kobel, MJ
Nogowski, R
Schubert, KR
Schwierz, R
Volk, A
Bernard, D
Bonneaud, GR
Latour, E
Verderi, M
Clark, PJ
Playfer, S
Watson, JE
Andreotti, M
Bettoni, D
Bozzi, C
Calabrese, R
Cecchi, A
Cibinetto, G
Franchini, P
Luppi, E
Negrini, M
Petrella, A
Piemontese, L
Santoro, V
Baldini-Ferroli, R
Calcaterra, A
Sangro, R
Finocchiaro, G
Pacetti, S
Patteri, P
Peruzzi, IM
Piccolo, M
Rama, M
Zallo, A
Contri, R
Guido, E
Lo Vetere, M
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Tosi, S
Chaisanguanthum, KS
Morii, M
Adametz, A
Marks, J
Schenk, S
Uwer, U
Bernlochner, FU
Klose, V
Lacker, HM
Bard, DJ
Dauncey, PD
Tibbetts, M
Behera, PK
Chai, X
Charles, MJ
Mallik, U
Cochran, J
Crawley, HB
Dong, L
Meyer, WT
Prell, S
Rosenberg, EI
Rubin, AE
Gao, YY
Gritsan, AV
Guo, ZJ
Arnaud, N
Bequilleux, J
D'Orazio, A
Davier, M
da Costa, JF
Grosdidier, G
Le Diberder, F
Lepeltier, V
Lutz, AM
Pruvot, S
Roudeau, P
Schune, MH
Serrano, J
Sordini, V
Stocchi, A
Wormser, G
Lange, DJ
Wright, DM
Bingham, I
Burke, JP
Chavez, CA
Fry, JR
Gabathuler, E
Gamet, R
Hutchcroft, DE
Payne, DJ
Touramanis, C
Bevan, AJ
Clarke, CK
Di Lodovico, F
Sacco, R
Sigamani, M
Cowan, G
Paramesvaran, S
Wren, AC
Brown, DN
Davis, CL
Denig, AG
Fritsch, M
Gradl, W
Hafner, A
Alwyn, KE
Bailey, D
Barlow, RJ
Jackson, G
Lafferty, GD
West, TJ
Yi, JI
Anderson, J
Chen, C
Jawahery, A
Roberts, DA
Simi, G
Tuggle, JM
Dallapiccola, C
Salvati, E
Saremi, S
Cowan, R
Dujmic, D
Fisher, PH
Henderson, SW
Sciolla, G
Spitznagel, M
Yamamoto, RK
Zhao, M
Patel, PM
Robertson, SH
Schram, M
Lazzaro, A
Lombardo, V
Palombo, F
Stracka, S
Bauer, JM
Cremaldi, L
Godang, R
Kroeger, R
Summers, DJ
Zhao, HW
Simard, M
Taras, P
Nicholson, H
De Nardo, G
Lista, L
Monorchio, D
Onorato, G
Sciacca, C
Raven, G
Snoek, HL
Jessop, CP
Knoepfel, KJ
LoSecco, JM
Wang, WF
Corwin, LA
Honscheid, K
Kagan, H
Kass, R
Morris, JP
Rahimi, AM
Regensburger, JJ
Sekula, SJ
Wong, QK
Blount, NL
Brau, J
Frey, R
Igonkina, O
Kolb, JA
Lu, M
Rahmat, R
Sinev, NB
Strom, D
Strube, J
Torrence, E
Castelli, G
Gagliardi, N
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Voci, C
Sanchez, PD
Ben-Haim, E
Briand, H
Chauveau, J
Hamon, O
Leruste, P
Ocariz, J
Perez, A
Prendki, J
Sitt, S
Gladney, L
Biasini, M
Manoni, E
Angelini, C
Batignani, G
Bettarini, S
Calderini, G
Carpinelli, M
Cervelli, A
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Morganti, M
Neri, N
Paoloni, E
Rizzo, G
Walsh, JJ
Pegna, DL
Lu, C
Olsen, J
Smith, AJS
Telnov, AV
Anulli, F
Baracchini, E
Cavoto, G
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Jackson, PD
Li Gioi, L
Mazzoni, MA
Morganti, S
Piredda, G
Renga, F
Voena, C
Ebert, M
Hartmann, T
Schroder, H
Waldi, R
Adye, T
Franek, B
Olaiya, EO
Wilson, FF
Emery, S
Esteve, L
de Monchenault, GH
Kozanecki, W
Vasseur, G
Yeche, C
Zito, M
Chen, XR
Liu, H
Park, W
Purohit, MV
White, RM
Wilson, JR
Allen, MT
Aston, D
Bartoldus, R
Benitez, JF
Cenci, R
Coleman, JP
Convery, MR
Dingfelder, JC
Dorfan, J
Dubois-Felsmann, GP
Dunwoodie, W
Field, RC
Gabareen, AM
Graham, MT
Grenier, P
Hast, C
Innes, WR
Kaminski, J
Kelsey, MH
Kim, H
Kim, P
Kocian, ML
Leith, DWGS
Li, S
Lindquist, B
Luitz, S
Luth, V
Lynch, HL
MacFarlane, DB
Marsiske, H
Messner, R
Muller, DR
Neal, H
Nelson, S
O'Grady, CP
Ofte, I
Perl, M
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Snyder, A
Su, D
Sullivan, MK
Suzuki, K
Swain, SK
Thompson, JM
Va'vra, J
Wagner, AP
Weaver, M
West, CA
Wisniewski, WJ
Wittgen, M
Wright, DH
Wulsin, HW
Yarritu, AK
Yi, K
Young, CC
Ziegler, V
Burchat, PR
Edwards, AJ
Miyashita, TS
Ahmed, S
Alam, MS
Ernst, JA
Pan, B
Saeed, MA
Zain, SB
Spanier, SM
Wogsland, BJ
Eckmann, R
Ritchie, JL
Ruland, AM
Schilling, CJ
Schwitters, RF
Drummond, BW
Izen, JM
Lou, XC
Bianchi, F
Gamba, D
Pelliccioni, M
Bomben, M
Bosisio, L
Cartaro, C
Ricca, G
Lanceri, L
Vitale, L
Azzolini, V
Lopez-March, N
Martinez-Vidal, F
Milanes, DA
Oyanguren, A
Albert, J
Banerjee, S
Bhuyan, B
Choi, HHF
Hamano, K
King, GJ
Kowalewski, R
Lewczuk, MJ
Nugent, IM
Roney, JM
Sobie, RJ
Gershon, TJ
Harrison, PF
Ilic, J
Latham, TE
Mohanty, GB
Puccio, EMT
Band, HR
Chen, X
Dasu, S
Flood, KT
Pan, Y
Prepost, R
Vuosalo, CO
Wu, SL
AF Aubert, B.
Karyotakis, Y.
Lees, J. P.
Poireau, V.
Prencipe, E.
Prudent, X.
Tisserand, V.
Tico, J. Garra
Grauges, E.
Lopez, L.
Palano, A.
Pappagallo, M.
Eigen, G.
Stugu, B.
Sun, L.
Battaglia, M.
Brown, D. N.
Kerth, L. T.
Kolomensky, Yu. G.
Lynch, G.
Osipenkov, I. L.
Tackmann, K.
Tanabe, T.
Hawkes, C. M.
Soni, N.
Watson, A. T.
Koch, H.
Schroeder, T.
Asgeirsson, D. J.
Fulsom, B. G.
Hearty, C.
Mattison, T. S.
McKenna, J. A.
Barrett, M.
Khan, A.
Randle-Conde, A.
Blinov, V. E.
Bukin, A. D.
Buzykaev, A. R.
Druzhinin, V. P.
Golubev, V. B.
Onuchin, A. P.
Serednyakov, S. I.
Skovpen, Yu. I.
Solodov, E. P.
Todyshev, K. Yu.
Bondioli, M.
Curry, S.
Eschrich, I.
Kirkby, D.
Lankford, A. J.
Lund, P.
Mandelkern, M.
Martin, E. C.
Stoker, D. P.
Abachi, S.
Buchanan, C.
Atmacan, H.
Gary, J. W.
Liu, F.
Long, O.
Vitug, G. M.
Yasin, Z.
Zhang, L.
Sharma, V.
Campagnari, C.
Hong, T. M.
Kovalskyi, D.
Mazur, M. A.
Richman, J. D.
Beck, T. W.
Eisner, A. M.
Heusch, C. A.
Kroseberg, J.
Lockman, W. S.
Martinez, A. J.
Schalk, T.
Schumm, B. A.
Seiden, A.
Winstrom, L. O.
Cheng, C. H.
Doll, D. A.
Echenard, B.
Fang, F.
Hitlin, D. G.
Narsky, I.
Piatenko, T.
Porter, F. C.
Andreassen, R.
Mancinelli, G.
Meadows, B. T.
Mishra, K.
Sokoloff, M. D.
Bloom, P. C.
Ford, W. T.
Gaz, A.
Hirschauer, J. F.
Nagel, M.
Nauenberg, U.
Smith, J. G.
Wagner, S. R.
Ayad, R.
Soffer, A.
Toki, W. H.
Wilson, R. J.
Feltresi, E.
Hauke, A.
Jasper, H.
Karbach, M.
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Harrison, P. F.
Ilic, J.
Latham, T. E.
Mohanty, G. B.
Puccio, E. M. T.
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CA BaBar Collaboration
TI Improved Measurement of B+->rho(+)rho(0) and Determination of the
Quark-Mixing Phase Angle alpha
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ISOSPIN ANALYSIS; CP ASYMMETRIES; B-DECAYS; VIOLATION
AB We present improved measurements of the branching fraction B, the longitudinal polarization fraction f(L), and the direct CP asymmetry A(CP) in the B meson decay channel B+->rho(+)rho(0). The data sample was collected with the BABAR detector at SLAC. The results are B(B+->rho(+)rho(0))=(23.7 +/- 1.4 +/- 1.4)x10(-6), f(L)=0.950 +/- 0.015 +/- 0.006, and A(CP)=-0.054 +/- 0.055 +/- 0.010, where the uncertainties are statistical and systematic, respectively. Based on these results, we perform an isospin analysis and determine the Cabibbo-Kobayashi-Maskawa phase angle alpha=arg(-VtdVtb*/VudVub*) to be (92.4(-6.5)(+6.0))degrees.
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[Allen, M. T.; Aston, D.; Bartoldus, R.; Benitez, J. F.; Cenci, R.; Coleman, J. P.; Convery, M. R.; Dingfelder, J. C.; Dorfan, J.; Dubois-Felsmann, G. P.; Dunwoodie, W.; Field, R. C.; Gabareen, A. M.; Graham, M. T.; Grenier, P.; Hast, C.; Innes, W. R.; Kaminski, J.; Kelsey, M. H.; Kim, H.; Kim, P.; Kocian, M. L.; Leith, D. W. G. S.; Li, S.; Lindquist, B.; Luitz, S.; Luth, V.; Lynch, H. L.; MacFarlane, D. B.; Marsiske, H.; Messner, R.; Muller, D. R.; Neal, H.; Nelson, S.; O'Grady, C. P.; Ofte, I.; Perl, M.; Ratcliff, B. N.; Roodman, A.; Salnikov, A. A.; Schindler, R. H.; Schwiening, J.; Snyder, A.; Su, D.; Sullivan, M. K.; Suzuki, K.; Swain, S. K.; Thompson, J. M.; Va'vra, J.; Wagner, A. P.; Weaver, M.; West, C. A.; Wisniewski, W. J.; Wittgen, M.; Wright, D. H.; Wulsin, H. W.; Yarritu, A. K.; Yi, K.; Young, C. C.; Ziegler, V.] Stanford Linear Accelerator Ctr, Natl Accelerator Lab, Stanford, CA 94309 USA.
[Burchat, P. R.; Edwards, A. J.; Miyashita, T. S.] Stanford Univ, Stanford, CA 94305 USA.
[Ahmed, S.; Alam, M. S.; Ernst, J. A.; Pan, B.; Saeed, M. A.; Zain, S. B.] SUNY Albany, Albany, NY 12222 USA.
[Spanier, S. M.; Wogsland, B. J.] Univ Tennessee, Knoxville, TN 37996 USA.
[Eckmann, R.; Ritchie, J. L.; Ruland, A. M.; Schilling, C. J.; Schwitters, R. F.] Univ Texas Austin, Austin, TX 78712 USA.
[Drummond, B. W.; Izen, J. M.; Lou, X. C.] Univ Texas Dallas, Richardson, TX 75083 USA.
[Bianchi, F.; Gamba, D.; Pelliccioni, M.] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy.
[Bianchi, F.; Gamba, D.; Pelliccioni, M.] Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
[Bomben, M.; Bosisio, L.; Cartaro, C.; Della Ricca, G.; Lanceri, L.; Vitale, L.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
[Bomben, M.; Bosisio, L.; Cartaro, C.; Della Ricca, G.; Lanceri, L.; Vitale, L.] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
[Azzolini, V.; Lopez-March, N.; Martinez-Vidal, F.; Milanes, D. A.; Oyanguren, A.] Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain.
[Albert, J.; Banerjee, Sw.; Bhuyan, B.; Choi, H. H. F.; Hamano, K.; King, G. J.; Kowalewski, R.; Lewczuk, M. J.; Nugent, I. M.; Roney, J. M.; Sobie, R. J.] Univ Victoria, Victoria, BC V8W 3P6, Canada.
[Gershon, T. J.; Harrison, P. F.; Ilic, J.; Latham, T. E.; Mohanty, G. B.; Puccio, E. M. T.] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
[Band, H. R.; Chen, X.; Dasu, S.; Flood, K. T.; Pan, Y.; Prepost, R.; Vuosalo, C. O.; Wu, S. L.] Univ Wisconsin, Madison, WI 53706 USA.
[Carpinelli, M.] Univ Sassari, I-07100 Sassari, Italy.
[Lopez, L.; Palano, A.; Pappagallo, M.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
RP Aubert, B (reprint author), Univ Savoie, CNRS, Lab Annecy Le Vieux Phys Particules, IN2P3, F-74941 Annecy Le Vieux, France.
RI Calabrese, Roberto/G-4405-2015; Martinez Vidal, F*/L-7563-2014;
Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Lusiani,
Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Morandin,
Mauro/A-3308-2016; Stracka, Simone/M-3931-2015; Di Lodovico,
Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016; Calcaterra,
Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; de Sangro,
Riccardo/J-2901-2012; Saeed, Mohammad Alam/J-7455-2012; Della Ricca,
Giuseppe/B-6826-2013; Negrini, Matteo/C-8906-2014; Monge, Maria
Roberta/G-9127-2012; Oyanguren, Arantza/K-6454-2014; Luppi,
Eleonora/A-4902-2015; White, Ryan/E-2979-2015; Patrignani,
Claudia/C-5223-2009; Neri, Nicola/G-3991-2012; Forti,
Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012
OI Strube, Jan/0000-0001-7470-9301; Chen, Chunhui /0000-0003-1589-9955;
Raven, Gerhard/0000-0002-2897-5323; Ebert, Marcus/0000-0002-3014-1512;
Corwin, Luke/0000-0001-7143-3821; Carpinelli,
Massimo/0000-0002-8205-930X; Sciacca, Crisostomo/0000-0002-8412-4072;
Adye, Tim/0000-0003-0627-5059; Lafferty, George/0000-0003-0658-4919;
Wilson, Robert/0000-0002-8184-4103; Calabrese,
Roberto/0000-0002-1354-5400; Martinez Vidal, F*/0000-0001-6841-6035;
Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere,
Maurizio/0000-0002-6520-4480; Lusiani, Alberto/0000-0002-6876-3288;
Lusiani, Alberto/0000-0002-6876-3288; Morandin,
Mauro/0000-0003-4708-4240; Stracka, Simone/0000-0003-0013-4714; Di
Lodovico, Francesca/0000-0003-3952-2175; Pappagallo,
Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826;
Frey, Raymond/0000-0003-0341-2636; Lanceri, Livio/0000-0001-8220-3095;
de Sangro, Riccardo/0000-0002-3808-5455; Saeed, Mohammad
Alam/0000-0002-3529-9255; Della Ricca, Giuseppe/0000-0003-2831-6982;
Negrini, Matteo/0000-0003-0101-6963; Monge, Maria
Roberta/0000-0003-1633-3195; Oyanguren, Arantza/0000-0002-8240-7300;
Luppi, Eleonora/0000-0002-1072-5633; White, Ryan/0000-0003-3589-5900;
Patrignani, Claudia/0000-0002-5882-1747; Neri,
Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965;
Rotondo, Marcello/0000-0001-5704-6163
FU DOE and NSF (USA); NSERC (Canada); CEA and CNRS-IN2P3 (France); BMBF and
DFG (Germany); INFN (Italy); FOM (The Netherlands); NFR (Norway); MES
(Russia); MEC (Spain); STFC (United Kingdom); Marie Curie EIF (European
Union); A.P. Sloan Foundation
FX We are grateful for the excellent luminosity and machine conditions
provided by our PEP-II colleagues and for the substantial dedicated
effort from the computing organizations that support BABAR. The
collaborating institutions thank SLAC for its support and kind
hospitality. This work is supported by DOE and NSF (USA), NSERC
(Canada), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN
(Italy), FOM (The Netherlands), NFR (Norway), MES (Russia), MEC (Spain),
and STFC (United Kingdom). Individuals have received support from the
Marie Curie EIF (European Union) and the A.P. Sloan Foundation.
NR 21
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 10
PY 2009
VL 102
IS 14
AR 141802
DI 10.1103/PhysRevLett.102.141802
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 431SA
UT WOS:000265082500012
PM 19392426
ER
PT J
AU Chung, M
Gilson, EP
Davidson, RC
Efthimion, PC
Majeski, R
AF Chung, Moses
Gilson, Erik P.
Davidson, Ronald C.
Efthimion, Philip C.
Majeski, Richard
TI Use of a Linear Paul Trap to Study Random Noise-Induced Beam Degradation
in High-Intensity Accelerators
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
AB A random noise-induced beam degradation that can affect intense beam transport over long propagation distances has been experimentally studied by making use of the transverse beam dynamics equivalence between an alternating-gradient (AG) focusing system and a linear Paul trap system. For the present studies, machine imperfections in the quadrupole focusing lattice are considered, which are emulated by adding small random noise on the voltage waveform of the quadrupole electrodes in the Paul trap. It is observed that externally driven noise continuously produces a nonthermal tail of trapped ions, and increases the transverse emittance almost linearly with the duration of the noise.
C1 [Chung, Moses] Fermilab Natl Accelerator Lab, Accelerator Phys Ctr, Batavia, IL 60510 USA.
[Chung, Moses; Gilson, Erik P.; Davidson, Ronald C.; Efthimion, Philip C.; Majeski, Richard] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Chung, M (reprint author), Fermilab Natl Accelerator Lab, Accelerator Phys Ctr, Batavia, IL 60510 USA.
FU U. S. Department of Energy
FX This research was supported by the U. S. Department of Energy.
NR 21
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 10
PY 2009
VL 102
IS 14
AR 145003
DI 10.1103/PhysRevLett.102.145003
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 431SA
UT WOS:000265082500033
PM 19392447
ER
PT J
AU Essin, AM
Moore, JE
Vanderbilt, D
AF Essin, Andrew M.
Moore, Joel E.
Vanderbilt, David
TI Magnetoelectric Polarizability and Axion Electrodynamics in Crystalline
Insulators
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID PHASE; POLARIZATION
AB The orbital motion of electrons in a three-dimensional solid can generate a pseudoscalar magnetoelectric coupling theta, a fact we derive for the single-particle case using a recent theory of polarization in weakly inhomogeneous materials. This polarizability theta is the same parameter that appears in the "axion electrodynamics" Lagrangian Delta L(EM)=(theta e(2)/2 pi h)E center dot B, which is known to describe the unusual magnetoelectric properties of the three-dimensional topological insulator (theta=pi). We compute theta for a simple model that accesses the topological insulator and discuss its connection to the surface Hall conductivity. The orbital magnetoelectric polarizability can be generalized to the many-particle wave function and defines the 3D topological insulator, like the integer quantum Hall effect, in terms of a topological ground-state response function.
C1 [Essin, Andrew M.; Moore, Joel E.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Moore, Joel E.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Vanderbilt, David] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
RP Essin, AM (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RI Moore, Joel/O-4959-2016;
OI Moore, Joel/0000-0002-4294-5761; Vanderbilt, David/0000-0002-2465-9091
FU Western Institute of Nanoelectronics; NSF [DMR-0804413, DMR-0549198]
FX The authors acknowledge useful discussions with A. Selem and I. Souza.
The work was supported by the Western Institute of Nanoelectronics ( A.
M. E.), NSF DMR-0804413 ( J. E. M.), and NSF DMR-0549198 ( D. V.).
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 10
PY 2009
VL 102
IS 14
AR 146805
DI 10.1103/PhysRevLett.102.146805
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 431SA
UT WOS:000265082500055
PM 19392469
ER
PT J
AU Im, MY
Bocklage, L
Fischer, P
Meier, G
AF Im, Mi-Young
Bocklage, Lars
Fischer, Peter
Meier, Guido
TI Direct Observation of Stochastic Domain-Wall Depinning in Magnetic
Nanowires
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID X-RAY MICROSCOPY; FERROMAGNETIC WIRES; SHIFT REGISTER
AB The stochastic field-driven depinning of a domain wall pinned at a notch in a magnetic nanowire is directly observed using magnetic x-ray microscopy with high lateral resolution down to 15 nm. The depinning-field distribution in Ni(80)Fe(20) nanowires considerably depends on the wire width and the notch depth. The difference in the multiplicity of domain-wall types generated in the vicinity of a notch is responsible for the observed dependence of the stochastic nature of the domain-wall depinning field on the wire width and the notch depth. Thus the random nature of the domain-wall depinning process is controllable by an appropriate design of the nanowire.
C1 [Im, Mi-Young; Fischer, Peter] Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Xray Opt, Berkeley, CA 94720 USA.
[Bocklage, Lars; Meier, Guido] Univ Hamburg, Inst Angew Phys, D-20355 Hamburg, Germany.
[Bocklage, Lars; Meier, Guido] Univ Hamburg, Zentrum Mikrostrukturforsch, D-20355 Hamburg, Germany.
RP Im, MY (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Xray Opt, Berkeley, CA 94720 USA.
RI MSD, Nanomag/F-6438-2012; Fischer, Peter/A-3020-2010;
OI Fischer, Peter/0000-0002-9824-9343; Bocklage, Lars/0000-0001-9769-4173
FU U. S. Department of Energy [DE-AC02-05CH11231]; Deutsche
Forschungsgemeinschaft
FX This work was supported by the Director, Office of Science, Office of
Basic Energy Sciences, of the U. S. Department of Energy under Contract
No. DE-AC02-05CH11231. Financial support of the Deutsche
Forschungsgemeinschaft via SFB 668 "Magnetism from the Single Atom to
the Nanostructure'' and via Graduiertenkolleg 1286 "Functional
Metal-Semiconductor Hybrid Systems'' is gratefully acknowledged.
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 10
PY 2009
VL 102
IS 14
AR 147204
DI 10.1103/PhysRevLett.102.147204
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 431SA
UT WOS:000265082500065
PM 19392479
ER
PT J
AU Kurita, N
Ronning, F
Tokiwa, Y
Bauer, ED
Subedi, A
Singh, DJ
Thompson, JD
Movshovich, R
AF Kurita, N.
Ronning, F.
Tokiwa, Y.
Bauer, E. D.
Subedi, A.
Singh, D. J.
Thompson, J. D.
Movshovich, R.
TI Low-Temperature Magnetothermal Transport Investigation of a Ni-Based
Superconductor BaNi2As2: Evidence for Fully Gapped Superconductivity
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID LAYERED CRYSTAL-STRUCTURE; THERMAL-CONDUCTIVITY; SPIN; FIELD; GAPS
AB We have performed low-temperature specific heat and thermal conductivity measurements of the Ni-based superconductor BaNi2As2 (T-c=0.7 K) in a magnetic field. In a zero field, thermal conductivity shows T-linear behavior in the normal state and exhibits a BCS-like exponential decrease below T-c. The field dependence of the residual thermal conductivity extrapolated to zero temperature is indicative of a fully gapped superconductor. This conclusion is supported by the analysis of the specific heat data, which are well fit by the BCS temperature dependence from T-c down to the lowest temperature of 0.1 K.
C1 [Kurita, N.; Ronning, F.; Tokiwa, Y.; Bauer, E. D.; Thompson, J. D.; Movshovich, R.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Subedi, A.; Singh, D. J.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
[Subedi, A.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RP Kurita, N (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
RI Bauer, Eric/D-7212-2011; Singh, David/I-2416-2012; Tokiwa,
Yoshifumi/P-6593-2015;
OI Tokiwa, Yoshifumi/0000-0002-6294-7879; Ronning,
Filip/0000-0002-2679-7957; Bauer, Eric/0000-0003-0017-1937
FU U. S. Department of Energy; DOE, Division of Materials Sciences and
Engineering
FX We thank I. Vekhter, M. Graf, S.- H. Baek, and H. Sakai for useful
discussions. Work at Los Alamos National Laboratory was performed under
the auspices of the U. S. Department of Energy. Work at Oak Ridge was
supported by the DOE, Division of Materials Sciences and Engineering.
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PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 10
PY 2009
VL 102
IS 14
AR 147004
DI 10.1103/PhysRevLett.102.147004
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 431SA
UT WOS:000265082500061
PM 19392475
ER
PT J
AU Macek, JH
Sternberg, JB
Ovchinnikov, SY
Lee, TG
Schultz, DR
AF Macek, J. H.
Sternberg, J. B.
Ovchinnikov, S. Y.
Lee, Teck-Ghee
Schultz, D. R.
TI Origin, Evolution, and Imaging of Vortices in Atomic Processes
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID COLLISIONS; ION; ORIENTATION; EXCITATION; ALIGNMENT
AB Vortices are usually associated with systems containing large numbers of particles. Of particular topical interest though are those formed within atomic-scale wave functions and observed in macroscopic systems such as superfluids and quantum condensates. We uncover them here in one of the most fundamental quantum systems consisting of just one electron and two protons. Moreover, the results of novel simulations of the dynamics of this system reveal previously unknown mechanisms of angular momentum transfer and new ways to image atomic-scale quantized vortices at macroscopic distances. Probing of vortices and vortex-driven dynamics in quantum systems is thereby illustrated.
C1 [Macek, J. H.; Sternberg, J. B.; Ovchinnikov, S. Y.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Macek, J. H.; Lee, Teck-Ghee; Schultz, D. R.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
[Ovchinnikov, S. Y.] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia.
RP Macek, JH (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RI Lee, Teck Ghee/D-5037-2012; Ovchinnikov, Serguei/C-4994-2014
OI Lee, Teck Ghee/0000-0001-9472-3194;
FU Office of Basic Energy Sciences; U.S. Department of Energy; University
of Tennessee [DE-FG02-02ER15283]; Oak Ridge National Laboratory;
UT-Battelle, LLC [DE-AC05-00OR22725]
FX This research is sponsored by the Office of Basic Energy Sciences, U.S.
Department of Energy, through grants to the University of Tennessee
(DE-FG02-02ER15283) and the Oak Ridge National Laboratory which is
managed by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725.
NR 17
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U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD APR 10
PY 2009
VL 102
IS 14
AR 143201
DI 10.1103/PhysRevLett.102.143201
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 431SA
UT WOS:000265082500022
PM 19392436
ER
PT J
AU Nishino, H
Clark, S
Abe, K
Hayato, Y
Iida, T
Ikeda, M
Kameda, J
Kobayashi, K
Koshio, Y
Miura, M
Moriyama, S
Nakahata, M
Nakayama, S
Obayashi, Y
Ogawa, H
Sekiya, H
Shiozawa, M
Suzuki, Y
Takeda, A
Takenaga, Y
Takeuchi, Y
Ueno, K
Ueshima, K
Watanabe, H
Yamada, S
Hazama, S
Higuchi, I
Ishihara, C
Kajita, T
Kaneyuki, K
Mitsuka, G
Okumura, K
Tanimoto, N
Vagins, MR
Dufour, F
Kearns, E
Litos, M
Raaf, JL
Stone, JL
Sulak, LR
Wang, W
Goldhaber, M
Dazeley, S
Svoboda, R
Bays, K
Casper, D
Cravens, JP
Kropp, WR
Mine, S
Regis, C
Smy, MB
Sobel, HW
Ganezer, KS
Hill, J
Keig, WE
Jang, JS
Kim, JY
Lim, IT
Fechner, M
Scholberg, K
Walter, CW
Wendell, R
Tasaka, S
Learned, JG
Matsuno, S
Watanabe, Y
Hasegawa, T
Ishida, T
Ishii, T
Kobayashi, T
Nakadaira, T
Nakamura, K
Nishikawa, K
Oyama, Y
Sakashita, K
Sekiguchi, T
Tsukamoto, T
Suzuki, AT
Minamino, A
Nakaya, T
Yokoyama, M
Fukuda, Y
Itow, Y
Tanaka, T
Jung, CK
Lopez, G
McGrew, C
Terri, R
Yanagisawa, C
Tamura, N
Idehara, Y
Sakuda, M
Kuno, Y
Yoshida, M
Kim, SB
Yang, BS
Ishizuka, T
Okazawa, H
Choi, Y
Seo, HK
Furuse, Y
Nishijima, K
Yokosawa, Y
Koshiba, M
Totsuka, Y
Chen, S
Heng, Y
Yang, Z
Zhang, H
Kielczewska, D
Thrane, E
Wilkes, RJ
AF Nishino, H.
Clark, S.
Abe, K.
Hayato, Y.
Iida, T.
Ikeda, M.
Kameda, J.
Kobayashi, K.
Koshio, Y.
Miura, M.
Moriyama, S.
Nakahata, M.
Nakayama, S.
Obayashi, Y.
Ogawa, H.
Sekiya, H.
Shiozawa, M.
Suzuki, Y.
Takeda, A.
Takenaga, Y.
Takeuchi, Y.
Ueno, K.
Ueshima, K.
Watanabe, H.
Yamada, S.
Hazama, S.
Higuchi, I.
Ishihara, C.
Kajita, T.
Kaneyuki, K.
Mitsuka, G.
Okumura, K.
Tanimoto, N.
Vagins, M. R.
Dufour, F.
Kearns, E.
Litos, M.
Raaf, J. L.
Stone, J. L.
Sulak, L. R.
Wang, W.
Goldhaber, M.
Dazeley, S.
Svoboda, R.
Bays, K.
Casper, D.
Cravens, J. P.
Kropp, W. R.
Mine, S.
Regis, C.
Smy, M. B.
Sobel, H. W.
Ganezer, K. S.
Hill, J.
Keig, W. E.
Jang, J. S.
Kim, J. Y.
Lim, I. T.
Fechner, M.
Scholberg, K.
Walter, C. W.
Wendell, R.
Tasaka, S.
Learned, J. G.
Matsuno, S.
Watanabe, Y.
Hasegawa, T.
Ishida, T.
Ishii, T.
Kobayashi, T.
Nakadaira, T.
Nakamura, K.
Nishikawa, K.
Oyama, Y.
Sakashita, K.
Sekiguchi, T.
Tsukamoto, T.
Suzuki, A. T.
Minamino, A.
Nakaya, T.
Yokoyama, M.
Fukuda, Y.
Itow, Y.
Tanaka, T.
Jung, C. K.
Lopez, G.
McGrew, C.
Terri, R.
Yanagisawa, C.
Tamura, N.
Idehara, Y.
Sakuda, M.
Kuno, Y.
Yoshida, M.
Kim, S. B.
Yang, B. S.
Ishizuka, T.
Okazawa, H.
Choi, Y.
Seo, H. K.
Furuse, Y.
Nishijima, K.
Yokosawa, Y.
Koshiba, M.
Totsuka, Y.
Chen, S.
Heng, Y.
Yang, Z.
Zhang, H.
Kielczewska, D.
Thrane, E.
Wilkes, R. J.
CA Super Kamiokande Collaboration
TI Search for Proton Decay via p -> e(+)pi(0) and p ->mu(+)pi(0) in a Large
Water Cherenkov Detector
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SIMULATION; LIFETIME; PHYSICS; NUCLEI; SO(10)
AB We have searched for proton decays via p -> e(+)pi(0) and p ->mu(+)pi(0) using data from a 91.7 kt center dot yr exposure of Super-Kamiokande-I and a 49.2 kt center dot yr exposure of Super-Kamiokande-II. No candidate events were observed with expected backgrounds induced by atmospheric neutrinos of 0.3 events for each decay mode. From these results, we set lower limits on the partial lifetime of 8.2x10(33) and 6.6x10(33) years at 90% confidence level for p -> e(+)pi(0) and p ->mu(+)pi(0) modes, respectively.
C1 [Nishino, H.; Hazama, S.; Higuchi, I.; Ishihara, C.; Kajita, T.; Kaneyuki, K.; Mitsuka, G.; Okumura, K.; Tanimoto, N.] Univ Tokyo, Res Ctr Cosm Neutrinos, Inst Cosm Ray Res, Chiba 2778582, Japan.
[Abe, K.; Hayato, Y.; Iida, T.; Ikeda, M.; Kameda, J.; Kobayashi, K.; Koshio, Y.; Miura, M.; Moriyama, S.; Nakahata, M.; Nakayama, S.; Obayashi, Y.; Ogawa, H.; Sekiya, H.; Shiozawa, M.; Suzuki, Y.; Takeda, A.; Takenaga, Y.; Takeuchi, Y.; Ueno, K.; Ueshima, K.; Watanabe, H.; Yamada, S.] Univ Tokyo, Inst Cosm Ray Res, Kamioka Observ, Gifu 5061205, Japan.
[Hayato, Y.; Moriyama, S.; Nakahata, M.; Shiozawa, M.; Suzuki, Y.; Takeuchi, Y.; Kajita, T.; Kaneyuki, K.; Vagins, M. R.; Kearns, E.; Stone, J. L.; Smy, M. B.; Sobel, H. W.; Scholberg, K.; Walter, C. W.; Nakamura, K.; Nakaya, T.] Univ Tokyo, Inst Phys & Math Universe, Chiba 2778582, Japan.
[Clark, S.; Dufour, F.; Kearns, E.; Litos, M.; Raaf, J. L.; Stone, J. L.; Sulak, L. R.; Wang, W.] Boston Univ, Dept Phys, Boston, MA 02215 USA.
[Goldhaber, M.] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
[Dazeley, S.; Svoboda, R.] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
[Vagins, M. R.; Bays, K.; Casper, D.; Cravens, J. P.; Kropp, W. R.; Mine, S.; Regis, C.; Smy, M. B.; Sobel, H. W.] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
[Ganezer, K. S.; Hill, J.; Keig, W. E.] Calif State Univ Dominguez Hills, Dept Phys, Carson, CA 90747 USA.
[Jang, J. S.; Kim, J. Y.; Lim, I. T.] Chonnam Natl Univ, Dept Phys, Kwangju 500757, South Korea.
[Fechner, M.; Scholberg, K.; Walter, C. W.; Wendell, R.] Duke Univ, Dept Phys, Durham, NC 27708 USA.
[Tasaka, S.] Gifu Univ, Dept Phys, Gifu 5011193, Japan.
[Learned, J. G.; Matsuno, S.] Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 USA.
[Watanabe, Y.] Kanagawa Univ, Dept Engn, Div Phys, Yokohama, Kanagawa 2218686, Japan.
[Hasegawa, T.; Ishida, T.; Ishii, T.; Kobayashi, T.; Nakadaira, T.; Nakamura, K.; Nishikawa, K.; Oyama, Y.; Sakashita, K.; Sekiguchi, T.; Tsukamoto, T.] KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan.
[Suzuki, A. T.] Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan.
[Minamino, A.; Nakaya, T.; Yokoyama, M.] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan.
[Fukuda, Y.] Miyagi Univ Educ, Dept Phys, Sendai, Miyagi 9800845, Japan.
[Itow, Y.; Tanaka, T.] Nagoya Univ, Solar Terr Environm Lab, Aichi 4648602, Japan.
[Jung, C. K.; Lopez, G.; McGrew, C.; Terri, R.; Yanagisawa, C.] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
[Tamura, N.] Niigata Univ, Dept Phys, Niigata 9502181, Japan.
[Idehara, Y.; Sakuda, M.] Okayama Univ, Dept Phys, Okayama 7008530, Japan.
[Kuno, Y.; Yoshida, M.] Osaka Univ, Dept Phys, Osaka 5600043, Japan.
[Kim, S. B.; Yang, B. S.] Seoul Natl Univ, Dept Phys, Seoul 151742, South Korea.
[Ishizuka, T.] Shizuoka Univ, Dept Syst Engn, Shizuoka 4328561, Japan.
[Okazawa, H.] Shizuoka Univ Welf, Dept Informat Social Welf, Shizuoka 4258611, Japan.
[Choi, Y.; Seo, H. K.] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea.
[Furuse, Y.; Nishijima, K.; Yokosawa, Y.] Tokai Univ, Dept Phys, Kanagawa 2591292, Japan.
[Koshiba, M.; Totsuka, Y.] Univ Tokyo, Tokyo 1130033, Japan.
[Chen, S.; Heng, Y.; Yang, Z.; Zhang, H.] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China.
[Kielczewska, D.] Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland.
[Thrane, E.; Wilkes, R. J.] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
RP Nishino, H (reprint author), Univ Tokyo, Res Ctr Cosm Neutrinos, Inst Cosm Ray Res, Chiba 2778582, Japan.
RI Yokoyama, Masashi/A-4458-2011; Nakamura, Kenzo/F-7174-2010; Sobel,
Henry/A-4369-2011; Obayashi, Yoshihisa/A-4472-2011; Suzuki,
Yoichiro/F-7542-2010; Takeuchi, Yasuo/A-4310-2011; Wilkes,
R.Jeffrey/E-6011-2013; Kim, Soo-Bong/B-7061-2014; Koshio,
Yusuke/C-2847-2015;
OI Yokoyama, Masashi/0000-0003-2742-0251; Koshio,
Yusuke/0000-0003-0437-8505; Raaf, Jennifer/0000-0002-4533-929X
FU Japanese Ministry of Education, Science, Sports and Culture; United
States Department of Energy
FX We gratefully acknowledge the cooperation of the Kamioka Mining and
Smelting Company. The Super-Kamiokande experiment was built and has been
operated with funding from the Japanese Ministry of Education, Science,
Sports and Culture, and the United States Department of Energy.
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JI Phys. Rev. Lett.
PD APR 10
PY 2009
VL 102
IS 14
AR 141801
DI 10.1103/PhysRevLett.102.141801
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 431SA
UT WOS:000265082500011
PM 19392425
ER
PT J
AU Noffsinger, J
Louie, SG
Cohen, ML
Giustino, F
AF Noffsinger, Jesse
Louie, Steven G.
Cohen, Marvin L.
Giustino, Feliciano
TI Role of Fluorine in the Iron Pnictides: Phonon Softening and Effective
Hole Doping
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ELECTRON; FORMALISM
AB Using a first-principles approach, we investigate the influence of fluorine doping on the electronic structure, lattice dynamics, and electron-phonon coupling in LaFeAsO. In order to explore properties which are not described by the virtual crystal approximation, we explicitly simulate the F doping using a supercell model. Our analysis reveals that the relaxation of the crystal lattice around the dopant modifies the lattice dynamics in agreement with recent experimental data. In addition, we find that the doped electronic charge does not localize on the two-dimensional Fe plane. The net charge variation in this plane upon doping corresponds instead to a slight hole doping.
C1 [Noffsinger, Jesse; Louie, Steven G.; Cohen, Marvin L.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Noffsinger, Jesse; Louie, Steven G.; Cohen, Marvin L.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Giustino, Feliciano] Univ Oxford, Dept Mat, Oxford OX1 3PH, England.
RP Noffsinger, J (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RI Giustino, Feliciano/F-6343-2013;
OI Giustino, Feliciano/0000-0001-9293-1176
FU National Science Foundation [DMR07-05941]; Office of Science, Office of
Basic Energy Sciences, Division of Materials Sciences and Engineering
Division, U. S. Department of Energy [DE-AC02-05CH11231]; SDSC; NPACI
FX The authors are grateful to Brad Malone for helpful discussions. This
work was supported by National Science Foundation Grant No. DMR07-05941
and by the Director, Office of Science, Office of Basic Energy Sciences,
Division of Materials Sciences and Engineering Division, U. S.
Department of Energy under Contract No. DE-AC02-05CH11231. Computational
resources have been provided by SDSC and NPACI. Calculations were
performed using the QUANTUM-ESPRESSO [ 17] package and Figs. 1 and 3
were rendered using XCRYSDEN [ 18].
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PD APR 10
PY 2009
VL 102
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AR 147003
DI 10.1103/PhysRevLett.102.147003
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UT WOS:000265082500060
PM 19392474
ER
PT J
AU Winger, JA
Ilyushkin, SV
Rykaczewski, KP
Gross, CJ
Batchelder, JC
Goodin, C
Grzywacz, R
Hamilton, JH
Korgul, A
Krolas, W
Liddick, SN
Mazzocchi, C
Padgett, S
Piechaczek, A
Rajabali, MM
Shapira, D
Zganjar, EF
Borzov, IN
AF Winger, J. A.
Ilyushkin, S. V.
Rykaczewski, K. P.
Gross, C. J.
Batchelder, J. C.
Goodin, C.
Grzywacz, R.
Hamilton, J. H.
Korgul, A.
Krolas, W.
Liddick, S. N.
Mazzocchi, C.
Padgett, S.
Piechaczek, A.
Rajabali, M. M.
Shapira, D.
Zganjar, E. F.
Borzov, I. N.
TI Large beta-Delayed Neutron Emission Probabilities in the Ni-78 Region
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DECAY PROPERTIES; HALF-LIVES; RICH ZN; NUCLEAR; SPECTROSCOPY; ISOTOPES
AB The beta-delayed neutron branching ratios (P-beta n) for nuclei near doubly magic Ni-78 have been directly measured using a new method combining high-resolution mass separation, reacceleration, and digital beta-gamma spectroscopy of U-238 fission products. The P-beta n values for the very neutron-rich isotopes Cu76-78 and Ga-83 were found to be much higher than previously reported and predicted. Revised calculations of the beta n process, accounting for new mass measurements and an inversion of the pi 2p(3/2) and pi 1f(5/2) orbitals, are in better agreement with these new experimental results.
C1 [Winger, J. A.; Ilyushkin, S. V.] Mississippi State Univ, Dept Phys & Astron, Mississippi State, MS 39762 USA.
[Rykaczewski, K. P.; Gross, C. J.; Grzywacz, R.; Shapira, D.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
[Batchelder, J. C.; Liddick, S. N.] Oak Ridge Associated Univ, UNIRIB, Oak Ridge, TN 37831 USA.
[Goodin, C.; Hamilton, J. H.; Korgul, A.] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
[Grzywacz, R.; Korgul, A.; Liddick, S. N.; Mazzocchi, C.; Padgett, S.; Rajabali, M. M.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Korgul, A.] Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland.
[Korgul, A.; Krolas, W.] Joint Inst Heavy Ion React, Oak Ridge, TN 37831 USA.
[Krolas, W.] Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland.
[Mazzocchi, C.] Univ Milan, IFGA, I-20133 Milan, Italy.
[Mazzocchi, C.] Ist Nazl Fis Nucl, I-20133 Milan, Italy.
[Piechaczek, A.; Zganjar, E. F.] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
[Borzov, I. N.] GSI Darmstadt, D-64291 Darmstadt, Germany.
RP Winger, JA (reprint author), Mississippi State Univ, Dept Phys & Astron, Mississippi State, MS 39762 USA.
EM j.a.winger@msstate.edu
RI Krolas, Wojciech/N-9391-2013
FU U.S. DOE [DE-FG02-96ER41006, DE-AC05-00OR22725, DE-FG02-96ER40983,
DE-AC05-06OR23100, DE-FG02-96ER40978, DE-FG0588ER40407]; NNSA
[DEFC0303NA00143]; Foundation for Polish Science;
[DFG-436RUS113907/0-1]
FX The authors gratefully acknowledge the work done by HRIBF staff in
producing such high quality radioactive ion beams. This work was
supported under U.S. DOE Grants No. DE-FG02-96ER41006, No.
DE-AC05-00OR22725, No. DE-FG02-96ER40983, No. DE-AC05-06OR23100, No.
DE-FG02-96ER40978, and No. DE-FG0588ER40407, through NNSA Grant No.
DEFC0303NA00143, through the Foundation for Polish Science, and through
the DFG-436RUS113907/0-1 grant.
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JI Phys. Rev. Lett.
PD APR 10
PY 2009
VL 102
IS 14
AR 142502
DI 10.1103/PhysRevLett.102.142502
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 431SA
UT WOS:000265082500017
PM 19392431
ER
PT J
AU Yuan, CW
Yi, DO
Sharp, ID
Shin, SJ
Liao, CY
Guzman, J
Ager, JW
Haller, EE
Chrzan, DC
AF Yuan, C. W.
Yi, D. O.
Sharp, I. D.
Shin, S. J.
Liao, C. Y.
Guzman, J.
Ager, J. W., III
Haller, E. E.
Chrzan, D. C.
TI Theory of Nanocluster Size Distributions from Ion Beam Synthesis
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ENHANCED DIFFUSION; SURFACE-DIFFUSION; ISLAND GROWTH; HOMOEPITAXY
AB Ion beam synthesis of nanoclusters is studied via both kinetic Monte Carlo simulations and the self-consistent mean-field solution to a set of coupled rate equations. Both approaches predict the existence of a steady-state shape for the cluster-size distribution that depends only on a characteristic length determined by the effective diffusion coefficient, the ion solubility, and the volumetric ion flux. The average cluster size in the steady-state regime is determined by the implanted species or matrix interface energy.
C1 [Yuan, C. W.; Yi, D. O.; Shin, S. J.; Liao, C. Y.; Guzman, J.; Haller, E. E.; Chrzan, D. C.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
[Yuan, C. W.; Yi, D. O.; Shin, S. J.; Liao, C. Y.; Guzman, J.; Ager, J. W., III; Haller, E. E.; Chrzan, D. C.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Sharp, I. D.] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany.
RP Yuan, CW (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
RI Sharp, Ian/I-6163-2015;
OI Sharp, Ian/0000-0001-5238-7487; Ager, Joel/0000-0001-9334-9751
FU U. S. Department of Energy [DE-AC02-05CH11231]
FX This research is supported by the Directorate, Office of Science, Office
of Basic Energy Sciences of the U. S. Department of Energy under
Contract No. DE-AC02-05CH11231.
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PD APR 10
PY 2009
VL 102
IS 14
AR 146101
DI 10.1103/PhysRevLett.102.146101
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 431SA
UT WOS:000265082500042
PM 19392456
ER
EF