FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU Parish, CM
Brennecka, GL
Tuttle, BA
Brewer, LN
AF Parish, Chad M.
Brennecka, Geoff L.
Tuttle, Bruce A.
Brewer, Luke N.
TI Quantitative X-Ray Spectrum Imaging of Lead Lanthanum Zirconate Titanate
PLZT Thin-Films
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID ANALYTICAL ELECTRON-MICROSCOPE; SOL-GEL PROCESS; SPATIAL-RESOLUTION; XPS
ANALYSIS; CRYSTALLIZATION; PHASE; CERAMICS; SURFACE; STEM;
NONSTOICHIOMETRY
AB The high permittivity of Pb(Zr,Ti)O(3) and (Pb,La)(Zr,Ti)O(3)-PZT and PLZT, respectively-thin films and the flexibility of chemical solution deposition (CSD) make solution-derived P(L)ZT thin films extremely attractive for integrated capacitor applications. However, Pb-loss or cation segregation during processing results in degraded properties of the final film. Here, we have extended the use of multivariate statistical analysis (MSA) of energy-dispersive spectroscopy (EDS) spectrum images (SIs) in scanning transmission electron microscopy (STEM) to allow the two-dimensional (2D) quantitative analysis of cation segregation and depletion in P(L)ZT thin films. Quantified STEM-EDS SIs allow high-resolution (< approximate to 10 nm) quantification of these cation distributions. Surface Pb depletion is found after crystallization and is replenished by a unique post-crystallization PbO overcoat+anneal processes. Zr/Ti and La segregation are found to develop in a decidedly nonplanar fashion during crystallization, especially in PLZT 12/70/30 material, highlighting the need for 2D analysis. Quantitative 2D chemical information is essential for improved processing of homogeneous P(L)ZT films with optimal electrical properties.
C1 [Parish, Chad M.; Brennecka, Geoff L.; Tuttle, Bruce A.; Brewer, Luke N.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Parish, CM (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM cmparish@sandia.gov
RI Parish, Chad/J-8381-2013; Brennecka, Geoff/J-9367-2012
OI Brennecka, Geoff/0000-0002-4476-7655
FU United States Department of Energy's National Nuclear Security
Administration [DE-AC04-94AL85000]
FX Sandia is a multiprogram laboratory operated by Sandia Corporation, a
LockheedMartin Company, for the United States Department of Energy's
National Nuclear Security Administration under contract
DE-AC04-94AL85000. Thanks to P. Kotula, J. Michael, and M. Keenan for
advice and discussions.
NR 59
TC 25
Z9 25
U1 0
U2 25
PU WILEY-BLACKWELL PUBLISHING, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0002-7820
J9 J AM CERAM SOC
JI J. Am. Ceram. Soc.
PD NOV
PY 2008
VL 91
IS 11
BP 3690
EP 3697
DI 10.1111/j.1551-2916.2008.02708.x
PG 8
WC Materials Science, Ceramics
SC Materials Science
GA 374SI
UT WOS:000261063600034
ER
PT J
AU Cho, CM
Noh, JH
Cho, IS
An, JS
Hong, KS
Kim, JY
AF Cho, Chin Moo
Noh, Jun Hong
Cho, In-Sun
An, Jae-Sul
Hong, Kug Sun
Kim, Jin Young
TI Low-Temperature Hydrothermal Synthesis of Pure BiFeO3 Nanopowders Using
Triethanolamine and Their Applications as Visible-Light Photocatalysts
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID BISMUTH FERRITE; OXIDES
AB BiFeO3 (BFO) nanopowders were synthesized at low temperatures via a hydrothermal process with the aid of triethanolamine (TEA) and their structural, optical, and photocatalytic properties were investigated. As a result of a strong reaction between TEA and Fe ions, pure BFO nanopowders without any secondary phases could be synthesized at temperatures as low as 130 degrees C. BFO nanopowders exhibited a strong absorption in the visible-light regime, which resulted in the efficient photocatalytic activity for decomposition of organic compounds.
C1 [Cho, Chin Moo; Noh, Jun Hong; Cho, In-Sun; An, Jae-Sul; Hong, Kug Sun] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea.
[Kim, Jin Young] Chem & Biosci Ctr, Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Hong, KS (reprint author), Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea.
EM kshongss@plaza.snu.ac.kr
RI Kim, Jin Young/B-7077-2012; Dom, Rekha/B-7113-2012; Cho, In
Sun/H-6557-2011;
OI Kim, Jin Young/0000-0001-7728-3182; Cho, In Sun/0000-0001-5622-7712
FU Korea Science and Engineering Foundation (KOSEF) [R01-2007-000-11075-0]
FX This work was supported by a Korea Science and Engineering Foundation
(KOSEF) grant funded by the Korean government (MOST) (RIAM)
(R01-2007-000-11075-0).
NR 19
TC 66
Z9 70
U1 2
U2 44
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0002-7820
EI 1551-2916
J9 J AM CERAM SOC
JI J. Am. Ceram. Soc.
PD NOV
PY 2008
VL 91
IS 11
BP 3753
EP 3755
DI 10.1111/j.1551-2916.2008.02689.x
PG 3
WC Materials Science, Ceramics
SC Materials Science
GA 374SI
UT WOS:000261063600046
ER
PT J
AU Yang, Y
Marshak, A
Chiu, JC
Wiscombe, WJ
Palm, SP
Davis, AB
Spangenberg, DA
Nguyen, L
Spinhirne, JD
Minnis, P
AF Yang, Yuekui
Marshak, Alexander
Chiu, J. Christine
Wiscombe, Warren J.
Palm, Stephen P.
Davis, Anthony B.
Spangenberg, Douglas A.
Nguyen, Louis
Spinhirne, James D.
Minnis, Patrick
TI Retrievals of Thick Cloud Optical Depth from the Geoscience Laser
Altimeter System (GLAS) by Calibration of Solar Background Signal
SO JOURNAL OF THE ATMOSPHERIC SCIENCES
LA English
DT Article
ID SATELLITE; INSTRUMENT
AB Laser beams emitted from the Geoscience Laser Altimeter System (GLAS), as well as other spaceborne laser instruments, can only penetrate clouds to a limit of a few optical depths. As a result, only optical depths of thinner clouds (< about 3 for GLAS) are retrieved from the reflected lidar signal. This paper presents a comprehensive study of possible retrievals of optical depth of thick clouds using solar background light and treating GLAS as a solar radiometer. To do so one must first calibrate the reflected solar radiation received by the photon-counting detectors of the GLAS 532-nm channel, the primary channel for atmospheric products. Solar background radiation is regarded as a noise to be subtracted in the retrieval process of the lidar products. However, once calibrated, it becomes a signal that can be used in studying the properties of optically thick clouds. In this paper, three calibration methods are presented: (i) calibration with coincident airborne and GLAS observations, (ii) calibration with coincident Geostationary Operational Environmental Satellite (GOES) and GLAS observations of deep convective clouds, and (iii) calibration from first principles using optical depth of thin water clouds over ocean retrieved by GLAS active remote sensing. Results from the three methods agree well with each other. Cloud optical depth (COD) is retrieved from the calibrated solar background signal using a one-channel retrieval. Comparison with COD retrieved from GOES during GLAS overpasses shows that the average difference between the two retrievals is 24%. As an example, the COD values retrieved from GLAS solar background are illustrated for a marine stratocumulus cloud field that is too thick to be penetrated by the GLAS laser. Based on this study, optical depths for thick clouds will be provided as a supplementary product to the existing operational GLAS cloud products in future GLAS data releases.
C1 [Yang, Yuekui] Univ Maryland, Goddard Earth Sci & Technol Ctr, Baltimore, MD 21201 USA.
[Chiu, J. Christine] Univ Maryland, Joint Ctr Earth Syst Technol, Baltimore, MD 21201 USA.
[Palm, Stephen P.; Spangenberg, Douglas A.] Sci Syst & Applicat Inc, Lanham, MD USA.
[Davis, Anthony B.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Nguyen, Louis; Minnis, Patrick] NASA, Langley Res Ctr, Hampton, VA USA.
RP Yang, Y (reprint author), NASA, Goddard Space Flight Ctr, Code 613-2, Greenbelt, MD 20771 USA.
EM yuekui@umbc.edu
RI Minnis, Patrick/G-1902-2010; Wiscombe, Warren/D-4665-2012; Chiu,
Christine/E-5649-2013; Marshak, Alexander/D-5671-2012; Yang,
Yuekui/B-4326-2015
OI Minnis, Patrick/0000-0002-4733-6148; Wiscombe,
Warren/0000-0001-6844-9849; Chiu, Christine/0000-0002-8951-6913;
FU NASA's ICESat Science Project
FX The authors thank Drs. Tamas Varnai, William Hart, David Doelling, and
Kristine Barbieri for helpful discussions and advice. This work was
supported by NASA's ICESat Science Project.
NR 26
TC 10
Z9 10
U1 3
U2 6
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0022-4928
J9 J ATMOS SCI
JI J. Atmos. Sci.
PD NOV
PY 2008
VL 65
IS 11
BP 3513
EP 3527
DI 10.1175/2008JAS2744.1
PG 15
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 374VZ
UT WOS:000261073100009
ER
PT J
AU Arboleya, ML
Babault, J
Owen, LA
Teixell, A
Finkel, RC
AF Arboleya, Maria-Luisa
Babault, Julien
Owen, Lewis A.
Teixell, Antonio
Finkel, Robert C.
TI Timing and nature of Quaternary fluvial incision in the Ouarzazate
foreland basin, Morocco
SO JOURNAL OF THE GEOLOGICAL SOCIETY
LA English
DT Article
ID HIGH ATLAS MOROCCO; IN-SITU BE-10; SOUTHEAST SPAIN; CLIMATE-CHANGE;
HYDROLOGICAL CHANGES; NUCLIDE PRODUCTION; IBERIAN PENINSULA; NORTHWEST
AFRICA; EROSION RATES; SIERRA-NEVADA
AB The history of alluvial fan and terrace formation within a stretch of the Ouarzazate basin along the southern margin of the Central High Atlas is reconstructed using geomorphological and Be-10 terrestrial cosmogenic nuclide (TCN) methods. Alluvial fan and terrace incision was controlled partially by a drop in base level during the Pliocene or early Pleistocene as the outlet channel, the Draa river, progressively cut through the Anti-Atlas to the south of the Ouarzazate foreland basin, the drainage of which started to become external after a long period of internal drained conditions. The alluvial fans and terrace surfaces have abandonment ages that date to at least the past four glacial cycles. Their formation was strongly modulated by climate on glacial-interglacial time scales as base level dropped. This demonstrates a strong climatic control on sediment transfer in other intracontinental mountain belts. Furthermore, these data show that mean rates of fluvial incision in this region range between 0.3 and 1.0 mm a(-1) for the latter part of the Quaternary. This study provides the first comprehensive TCN chronology for the Atlas Mountains, and it illustrates the applicability and limitations of TCN methods.
C1 [Arboleya, Maria-Luisa; Babault, Julien; Teixell, Antonio] Univ Autonoma Barcelona, Dept Geol, E-08193 Barcelona, Spain.
[Owen, Lewis A.] Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA.
[Finkel, Robert C.] Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 92521 USA.
RP Arboleya, ML (reprint author), Univ Autonoma Barcelona, Dept Geol, E-08193 Barcelona, Spain.
EM MariaLuisa.Arboleya@uab.es
RI babault, julien/L-9748-2014;
OI babault, julien/0000-0002-9602-0975; Teixell,
Antonio/0000-0002-7423-6361
FU Ministerio de Educacion y Ciencia (Spain) [CLG2005-25059 and
CGL2006-07226]; Ministerio de Asuntos Exteriores AECI [A/2921/05];
CONSOLIDER-INGENIO [CDS2006-00041]; Lawrence Livermore National
Laboratory [W-7405-ENG-48]; Salvador de Madariaga Program (MEC, Spain)
FX We should like to thank J. Woodward, P. Hughes, D. Maddy and an
anonymous reviewer for their very constructive and useful reviews of our
manuscript. This work was supported by the Ministerio de Educacion y
Ciencia (Spain) projects CLG2005-25059 and CGL2006-07226, the Ministerio
de Asuntos Exteriores AECI grant A/2921/05 and the CONSOLIDER-INGENIO
2010 project CDS2006-00041 (TOPOIBERIA). The TCN AMS analytical work was
undertaken at the Lawrence Livermore National Laboratory (under DOE
contract W-7405-ENG-48). M.L.A. benefited from a grant from the Salvador
de Madariaga Program (MEC, Spain) during her sabbatical leave at the
University of Cincinnati. She also thanks C. Dietsch and E. Ward for
their hospitality during her stay. We thank C. Dietsch for his comments
on an early version of this manuscript.
NR 83
TC 17
Z9 17
U1 1
U2 8
PU GEOLOGICAL SOC PUBL HOUSE
PI BATH
PA UNIT 7, BRASSMILL ENTERPRISE CENTRE, BRASSMILL LANE, BATH BA1 3JN, AVON,
ENGLAND
SN 0016-7649
EI 2041-479X
J9 J GEOL SOC LONDON
JI J. Geol. Soc.
PD NOV
PY 2008
VL 165
BP 1059
EP 1073
DI 10.1144/0016-76492007-151
PN 6
PG 15
WC Geosciences, Multidisciplinary
SC Geology
GA 377SP
UT WOS:000261271200006
ER
PT J
AU Imai, T
Ahilan, K
Ning, FL
McGuire, MA
Sefat, AS
Jin, RY
Sales, BC
Mandrus, D
AF Imai, Takashi
Ahilan, Kanagasingham
Ning, Fanlong
McGuire, Michael A.
Sefat, Athena S.
Jin, Ronying
Sales, Brian C.
Mandrus, David
TI NMR measurements of intrinsic spin susceptibility in LaFeAsO0.9F0.1
SO JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
LA English
DT Article
DE iron pnictide superconductor; high temperature superconductivity; NMR
AB We will probe the intrinsic behavior of spin susceptibility chi(spin) in the LaFeAsO1-xFx superconductor (x similar to 0.1, T-c similar to 27 K) using F-19 and As-75 NMR techniques. Our new results firmly establish a pseudo-gap behavior with Delta(PG)/k(B) similar to 140 K. The estimated magnitude of chi(spin) at 290 K, chi(spin) similar to 1.8 x 10(-4) emu/mol-Fe, is approximately twice larger than that in high T-c cuprates. We also show that chi(spin) levels off below similar to 50 K down to T-c.
C1 [Imai, Takashi; Ahilan, Kanagasingham; Ning, Fanlong] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada.
[Imai, Takashi] Canadian Inst Adv Res, Toronto, ON M5G 1Z8, Canada.
[McGuire, Michael A.; Sefat, Athena S.; Jin, Ronying; Sales, Brian C.; Mandrus, David] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Imai, T (reprint author), McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada.
EM imai@mcmaster.ca
RI Mandrus, David/H-3090-2014; Sefat, Athena/R-5457-2016
OI Sefat, Athena/0000-0002-5596-3504
FU NSERC; CFI; CIFAR; Division of Materials Science and Engineering, Office
of Basic Sciences, Oak Ridge National Laboratory; U.S. Department of
Energy [DE-AC-05-00OR22725]
FX T.I. acknowledges financial support from NSERC, CFI and CIFAR. Research
sponsored by the Division of Materials Science and Engineering, Office
of Basic Sciences, Oak Ridge National Laboratory is managed by
UT-Battelle, LLC, for the U.S. Department of Energy under contract No.
DE-AC-05-00OR22725. A portion of this work was performed by Eugene P.
Wigner Fellows at ORNL.
NR 27
TC 16
Z9 16
U1 0
U2 1
PU PHYSICAL SOC JAPAN
PI TOKYO
PA YUSHIMA URBAN BUILDING 5F, 2-31-22 YUSHIMA, BUNKYO-KU, TOKYO, 113-0034,
JAPAN
SN 0031-9015
J9 J PHYS SOC JPN
JI J. Phys. Soc. Jpn.
PD NOV
PY 2008
VL 77
SU C
BP 47
EP 53
PG 7
WC Physics, Multidisciplinary
SC Physics
GA V29YO
UT WOS:000208783900012
ER
PT J
AU Chu, CW
Chaudhury, RP
Chen, F
Gooch, M
Guloy, A
Lorenz, B
Lv, B
Sasmal, K
Tang, ZJ
Wang, LM
Xue, YY
AF Chu, Ching-Wu
Chaudhury, Rajit P.
Chen, Feng
Gooch, Melissa
Guloy, Arnold
Lorenz, Bernd
Lv, Bing
Sasmal, Kalyan
Tang, Zhongjia
Wang, Limin
Xue, Yu-Yi
TI Superconductivity in R(O,F)FeAs, AFe(2)As(2), (A,A')Fe2As2, AFeAs and
LaNFeAs, where R = Rare Earth, A = Alkaline and A = Alkaline Earth
SO JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
LA English
DT Article
AB This paper was based on the presentation delivered at the International Symposium on Fe-oxypnictide Superconductors held on June 29, 2008, in Tokyo. Preliminary results obtained before the Symposium on R(O,F)FeAs, AFe(2)As(2), (A,A')Fe2As2, AFeAs and LaNFeAs, where R = rare earth, A = alkaline and A' = alkaline earth are presented and discussed. The motivations for various experiments and the implications of the observations are also provided.
C1 [Chaudhury, Rajit P.; Chen, Feng; Gooch, Melissa; Lorenz, Bernd; Sasmal, Kalyan; Xue, Yu-Yi] Univ Houston, Dept Phys, Houston, TX 77204 USA.
[Chaudhury, Rajit P.; Chen, Feng; Gooch, Melissa; Guloy, Arnold; Lorenz, Bernd; Lv, Bing; Sasmal, Kalyan; Tang, Zhongjia; Wang, Limin; Xue, Yu-Yi] Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA.
[Chu, Ching-Wu] Hong Kong Univ Sci & Technol, Kowloon, Hong Kong, Peoples R China.
[Chu, Ching-Wu] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Guloy, Arnold; Lv, Bing; Tang, Zhongjia; Wang, Limin] Univ Houston, Dept Chem, Houston, TX 77204 USA.
RP Chu, CW (reprint author), Hong Kong Univ Sci & Technol, Kowloon, Hong Kong, Peoples R China.
EM cwchu@uh.edu
FU T. L. L. Temple Foundation; John J. and Rebecca Moores Endowment; State
of Texas through the Texas Center for Superconductivity; U.S. Office of
Scientific Research; U.S. Department of Energy; National Science
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. Office of Scientific
Research and the U.S. Department of Energy. A. M. G. and B. L.
acknowledge support from the National Science Foundation. The supply of
the first few samples of electron-doped Sm1111 in the early stage of
study by Professor X. H. Chen is greatly appreciated.
NR 21
TC 5
Z9 5
U1 0
U2 5
PU PHYSICAL SOC JAPAN
PI TOKYO
PA YUSHIMA URBAN BUILDING 5F, 2-31-22 YUSHIMA, BUNKYO-KU, TOKYO, 113-0034,
JAPAN
SN 0031-9015
J9 J PHYS SOC JPN
JI J. Phys. Soc. Jpn.
PD NOV
PY 2008
VL 77
SU C
BP 72
EP 77
PG 6
WC Physics, Multidisciplinary
SC Physics
GA V29YO
UT WOS:000208783900018
ER
PT J
AU Hwang, DJ
Misra, N
Grigoropoulos, CP
Minor, AM
Mao, SS
AF Hwang, David J.
Misra, Nipun
Grigoropoulos, Costas P.
Minor, Andrew M.
Mao, Samuel S.
TI In situ monitoring of material processing by a pulsed laser beam coupled
via a lensed fiber into a scanning electron microscope
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
LA English
DT Article
DE chemical vapour deposition; focused ion beam technology; laser materials
processing; scanning electron microscopes
ID NEAR-FIELD; FEMTOSECOND LASER; PARTICLES; ABLATION; SILICON; DEPOSITION;
NANOWIRES; PLATINUM; REMOVAL; SURFACE
AB In this study, a new method coupling laser irradiation into a dual-beam scanning electron microscope (SEM) and focused-ion-beam (FIB) system is developed. By using a lensed fiber, pulsed laser illumination could be successfully delivered onto the sample under SEM imaging, providing in situ monitoring for laser material processing applications including local modification of micro-/nanostructures and laser-assisted chemical vapor deposition. In situ characterization of the laser-induced features by high resolution SEM imaging and energy dispersive x-ray spectrometry was successfully carried out. Furthermore, in situ repair of a contaminated lensed fiber probe during laser-assisted chemical vapor deposition was demonstrated via FIB milling. The results demonstrate the full compatibility of the lensed fiber apparatus with the dual-beam apparatus without disturbing the original functions of the system. The combination of guided laser radiation with SEM and FIB instruments offers a powerful capability for in situ monitoring of multilevel laser-based micro- and nanoscale material processing.
C1 [Hwang, David J.; Misra, Nipun; Grigoropoulos, Costas P.; Mao, Samuel S.] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA.
[Grigoropoulos, Costas P.; Mao, Samuel S.] Univ Calif Berkeley, Lawrence Berkeley Lab, EETD, Adv Energy Technol Dept, Berkeley, CA 94720 USA.
[Minor, Andrew M.] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
[Minor, Andrew M.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
RP Hwang, DJ (reprint author), Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA.
EM cgrigoro@me.berkeley.edu
RI Han, Kyuhee/B-6201-2009
FU SPAWAR [N66001-08-12041]; Lawrence Berkeley National Laboratory; U. S.
Department of Energy [DE-AC02-05CH11231]; SINAM NSEC
FX The authors gratefully acknowledge support by the DARPA/MTO under the
SPAWAR Grant No. N66001-08-12041. Any opinions, findings, and
conclusions expressed in this publication are those of the authors and
do not necessarily reflect the views of DARPA/MTO. Research performed at
the National Center for Electron Microscopy, Lawrence Berkeley National
Laboratory, was supported by the Scientific User Facilities Division of
the Office of Basic Energy Sciences, U. S. Department of Energy under
Contract No. DE-AC02- 05CH11231. D. J. H. and C. P. G. acknowledge
support by the SINAM NSEC.
NR 37
TC 7
Z9 7
U1 2
U2 17
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0734-2101
J9 J VAC SCI TECHNOL A
JI J. Vac. Sci. Technol. A
PD NOV
PY 2008
VL 26
IS 6
BP 1432
EP 1438
DI 10.1116/1.2987946
PG 7
WC Materials Science, Coatings & Films; Physics, Applied
SC Materials Science; Physics
GA 370QH
UT WOS:000260777100008
ER
PT J
AU Naulleau, PP
Gallatin, G
AF Naulleau, Patrick P.
Gallatin, Gregg
TI Spatial scaling metrics of mask-induced line-edge roughness
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article
DE masks; nanolithography; resists
ID EXTREME-ULTRAVIOLET LITHOGRAPHY; RESIST; ALIGNMENT
AB Mask contributors to line-edge roughness (LER) have recently been shown to be an issue of concern for both the accuracy of current resist evaluation tests as well the ultimate LER requirements for the 22 nm production node. Problems arise from mask absorber LER as well as mask multilayer roughness leading to random phase variations in the reflected beam. Not only do these mask contributors effect the total measured LER in resist but they also have an impact on LER spatial scaling characteristics such as power spectral density and the related descriptors of correlation length and roughness exponent. Understanding how these metrics respond to mask effects may lead to an experimental mechanism for evaluating the importance of mask contributors to observed LER in resist. Here the authors present a detailed study of mask-induced LER spatial characteristics. The authors further describe the influence of illumination conditions and defocus on the metrics and compare the results to those expected from intrinsic resist LER. The results show power spectral density analysis to be a promising technique for distinguishing mask and resist contributors to LER.
C1 [Naulleau, Patrick P.] Lawrence Berkeley Natl Lab, Ctr XRay Opt, Berkeley, CA 94720 USA.
[Gallatin, Gregg] Appl Math Solut, Newtown, CT 06470 USA.
RP Naulleau, PP (reprint author), Lawrence Berkeley Natl Lab, Ctr XRay Opt, Berkeley, CA 94720 USA.
EM pnaulleau@lbl.gov
RI Gallatin, Gregg/H-1998-2012
FU SEMATECH; U. S. Department of Energy [DE-AC02-05CH11231]
FX The authors are grateful to Warren Montgomery of SEMATECH for program
support. This work was supported by SEMATECH and carried out at Lawrence
Berkeley National Laboratory's Advanced Light Source, which is 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.
NR 17
TC 23
Z9 23
U1 0
U2 1
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD NOV
PY 2008
VL 26
IS 6
BP 1903
EP 1910
DI 10.1116/1.3010712
PG 8
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 379GV
UT WOS:000261385600017
ER
PT J
AU Maldonado, JR
Sun, Y
Liu, Z
Liu, XF
Tanimoto, S
Pianetta, P
Pease, F
AF Maldonado, Juan R.
Sun, Yun
Liu, Zhi
Liu, Xuefeng
Tanimoto, Sayaka
Pianetta, Piero
Pease, Fabian
TI Evaluation of electron energy spread in CsBr based photocathodes
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 52nd International Conference on Electron, Ion and Photon Beam
Technology and Nanofabrication
CY MAY 27-30, 2008
CL Portland, OR
DE caesium compounds; current density; photocathodes; thin films
AB Photocathodes with relatively low energy spread (< 0.5 eV) are required for electron sources in several applications including single and multiple electron beam inspection and lithography tools and free electron lasers. CsBr based photocathodes have been shown to be very robust and capable of operation at high current density (>150 A/cm(2)) with very long lifetime (approximately hundreds of hours/spot). Experimental results of the photoelectron energy spread obtained in CsBr films deposited on both metal and InGaN substrates will be presented in this paper.
C1 [Maldonado, Juan R.; Pease, Fabian] Stanford Univ, Dept Elect Engn, Stanford, CA 94025 USA.
[Sun, Yun; Liu, Zhi; Pianetta, Piero] Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
[Liu, Xuefeng] KLA Tencor, Mountain View, CA 95035 USA.
[Tanimoto, Sayaka] Hitachi Cent Res Lab, Kokubunji, Tokyo 185, Japan.
RP Maldonado, JR (reprint author), Stanford Univ, Dept Elect Engn, Stanford, CA 94025 USA.
RI Liu, Zhi/B-3642-2009
OI Liu, Zhi/0000-0002-8973-6561
NR 6
TC 8
Z9 8
U1 0
U2 3
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD NOV
PY 2008
VL 26
IS 6
BP 2085
EP 2090
DI 10.1116/1.2976572
PG 6
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 379GV
UT WOS:000261385600045
ER
PT J
AU Skinner, JL
Talin, AA
Horsley, DA
AF Skinner, Jack L.
Talin, A. Alec
Horsley, David A.
TI Light modulation with nanopatterned diffractive microelectromechanical
system pixels
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 52nd International Conference on Electron, Ion and Photon Beam
Technology and Nanofabrication
CY MAY 27-30, 2008
CL Portland, OR
DE micromechanical devices; nanolithography; optical modulation
ID IMPRINT LITHOGRAPHY; TRANSMISSION; FABRICATION
AB The design, fabrication, and testing of a microelectromechanical system (MEMS) optical modulator is presented. Polarization effects of noncircular holes on reflectivity are examined. Thermal nanoimprint lithography is used to form an array of 150 nm diameter nanoholes in a 60 nm thick metal film on a silicon-on-insulator wafer. A quartz superstrate with an indium tin oxide electrode and a photoresist spacer is used to electrostatically actuate the MEMS pixel. The motion of the pixel in relation to the superstrate causes shifts in the wavelengths of optical interference from the periodic nanohole array. An optical modulation depth of over 67% is demonstrated with this modulation method. Dynamic modal analysis is also presented.
C1 [Skinner, Jack L.; Talin, A. Alec] Sandia Natl Labs, Livermore, CA 94551 USA.
[Skinner, Jack L.; Horsley, David A.] Univ Calif Berkeley, Berkeley Sensor & Actuator Ctr, Berkeley, CA 94720 USA.
[Skinner, Jack L.; Horsley, David A.] Univ Calif Davis, Dept Mech & Aeronaut Engn, Davis, CA 95616 USA.
[Talin, A. Alec] Ctr Integrated Nanotechnol, Albuquerque, NM 87185 USA.
RP Skinner, JL (reprint author), Sandia Natl Labs, Livermore, CA 94551 USA.
EM jlskinn@sandia.gov
NR 16
TC 4
Z9 4
U1 1
U2 1
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD NOV
PY 2008
VL 26
IS 6
BP 2139
EP 2144
DI 10.1116/1.2998725
PG 6
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 379GV
UT WOS:000261385600056
ER
PT J
AU Lu, M
Ocola, LE
Gray, SK
Wiederrecht, GP
AF Lu, M.
Ocola, L. E.
Gray, S. K.
Wiederrecht, G. P.
TI Fabrication of metallic nanoslit waveguides with sharp bends
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 52nd International Conference on Electron, Ion and Photon Beam
Technology and Nanofabrication
CY MAY 27-30, 2008
CL Portland, OR
DE gold; integrated optics; micro-optics; nanolithography; nanotechnology;
optical fabrication; optical waveguides
ID ZONE PLATES; LITHOGRAPHY; SILICON; RESIST
AB Metallic nanoslit waveguides are promising candidates for ultrahigh-density optical interconnections. A variety of devices based on metallic nanoslit waveguides have already been proposed that show a great superiority over conventional photonic devices for compactness. However very few two-dimensional devices have been experimentally demonstrated with in-plane geometries due to fabrication difficulties. In this article, a feasible process is presented using traditional semiconductor fabrication technologies such as mix-and-match lithography and electroplating, which is cable of fabricating complicated 100 nm wide, 800 nm deep gold slit waveguides with multiple sharp right-angle corners. The process can be extended to volume production manufacturing with minor modifications, thus enabling the fabrication of nanoslit photonic circuits and networks.
C1 [Lu, M.; Ocola, L. E.; Wiederrecht, G. P.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
[Gray, S. K.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Lu, M (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
NR 21
TC 1
Z9 1
U1 1
U2 1
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD NOV
PY 2008
VL 26
IS 6
BP 2151
EP 2155
DI 10.1116/1.3013398
PG 5
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 379GV
UT WOS:000261385600058
ER
PT J
AU Seo, HS
Lee, DG
Kim, H
Huh, S
Ahn, BS
Han, H
Kim, D
Kim, SS
Cho, HK
Gullikson, EM
AF Seo, Hwan-Seok
Lee, Dong-Gun
Kim, Hoon
Huh, Sungmin
Ahn, Byung-Sup
Han, Hakseung
Kim, Dongwan
Kim, Seong-Sue
Cho, Han-Ku
Gullikson, Eric M.
TI Effects of mask absorber structures on the extreme ultraviolet
lithography
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 52nd International Conference on Electron, Ion and Photon Beam
Technology and Nanofabrication
CY MAY 27-30, 2008
CL Portland, OR
DE masks; refractive index; tantalum compounds; ultraviolet lithography
AB In this paper, the authors present the results of an investigation of the dependence of mask absorber thickness on the extreme ultraviolet lithography (EUVL) and suggest a new mask structure to minimize shadowing effects. For this purpose, several patterned masks with various TaN absorber thicknesses are fabricated using in-house Ru-capped EUVL mask blanks. According to the simulation using practical refractive indices, which are obtained at EUV wavelengths, the absorber thickness can be reduced to that of out-of-phase (Delta Phi=180 degrees) ranges without loss of image contrast and normalized image log slope. Thickness to meet out-of-phase in real mask can be obtained by comparing field spectrum intensity ratio using the EUV coherent scattering microscopy (CSM). 52.4 nm in thickness is close to Delta Phi=180 degrees for TaN absorber since it shows the highest 1st/0th order intensity ratio as well as the best resolution in the microfield exposure tool (MET) test. When we apply 40-nm-thick TaN instead of 80-nm-thick TaN, the amounts of H-V bias reduction in wafer scale correspond to 80% (2.46-0.48 nm) by CSM and 70% (2.23-0.65 nm) by MET test results. Considering the fact that H-V bias in the MET is similar with that of simulation using the resist model, the degree of H-V bias in the alpha demo tool (ADT) is supposed to be much higher than that of MET due to its higher incident angle (theta=6 degrees). Our final goal is to develop a thin absorber EUVL mask which has a low H-V bias, high EUV printability and DUV contrast, and sufficient optical density at the border. To achieve this, blind layer treatment and integration with anti-reflective coating layer are in progress.
C1 [Seo, Hwan-Seok; Lee, Dong-Gun; Kim, Hoon; Huh, Sungmin; Ahn, Byung-Sup; Han, Hakseung; Kim, Dongwan; Kim, Seong-Sue; Cho, Han-Ku] Samsung Elect Co Ltd, Memory R&D Ctr, Hwasung City 445701, Gyeonggi Do, South Korea.
[Gullikson, Eric M.] Lawrence Berkeley Natl Lab, Ctr Xray Opt, Berkeley, CA 94720 USA.
RP Seo, HS (reprint author), Samsung Elect Co Ltd, Memory R&D Ctr, San 16 Banwol Dong, Hwasung City 445701, Gyeonggi Do, South Korea.
EM hwanseok.seo@samsung.com
NR 12
TC 16
Z9 16
U1 0
U2 0
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD NOV
PY 2008
VL 26
IS 6
BP 2208
EP 2214
DI 10.1116/1.3002488
PG 7
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 379GV
UT WOS:000261385600070
ER
PT J
AU Goldberg, KA
Naulleau, P
Mochi, I
Anderson, EH
Rekawa, SB
Kemp, CD
Gunion, RF
Han, HS
Huh, S
AF Goldberg, K. A.
Naulleau, P.
Mochi, I.
Anderson, E. H.
Rekawa, S. B.
Kemp, C. D.
Gunion, R. F.
Han, H. -S.
Huh, S.
TI Actinic extreme ultraviolet mask inspection beyond 0.25 numerical
aperture
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 52nd International Conference on Electron, Ion and Photon Beam
Technology and Nanofabrication
CY MAY 27-30, 2008
CL Portland, OR
DE masks; ultraviolet lithography
AB The SEMATECH Berkeley actinic inspection tool (AIT) is an extreme ultraviolet (EUV)-wavelength mask inspection microscope designed for direct aerial image measurements and precommercial EUV mask research. Operating on a synchrotron bending magnet beamline, the AIT uses an off-axis Fresnel zoneplate lens to project a high-magnification EUV image directly onto a charge coupled device camera. The authors present the results of recent system upgrades that have improved the imaging resolution, illumination uniformity, and partial coherence. Benchmarking tests show image contrast above 75% for 100 nm mask features and significant improvements and across the full range of measured sizes. The zoneplate lens has been replaced by an array of user-selectable zoneplates with higher magnification and numerical aperture (NA) values up to 0.0875, emulating the spatial resolution of a 0.35 NA 4x EUV stepper. Illumination uniformity is above 90% for mask areas 2 mu m wide and smaller. An angle-scanning mirror reduces the high coherence of the synchrotron beamline light source giving measured sigma values of approximately 0.125 at 0.0875 NA.
C1 [Goldberg, K. A.; Naulleau, P.; Mochi, I.; Anderson, E. H.; Rekawa, S. B.; Kemp, C. D.; Gunion, R. F.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Huh, S.] SEMATECH, Albany, NY 12203 USA.
[Han, H. -S.] Samsung Elect, Photomask Team, Hwasung 445701, Kyunggi, South Korea.
RP Goldberg, KA (reprint author), Lawrence Berkeley Natl Lab, Mail Stop 2-400, Berkeley, CA 94720 USA.
EM kagoldberg@lbl.gov
NR 7
TC 22
Z9 22
U1 0
U2 1
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD NOV
PY 2008
VL 26
IS 6
BP 2220
EP 2224
DI 10.1116/1.3002490
PG 5
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 379GV
UT WOS:000261385600072
ER
PT J
AU Belau, L
Park, JY
Liang, T
Somorjai, GA
AF Belau, Leonid
Park, Jeong Y.
Liang, Ted
Somorjai, Gabor A.
TI The effects of oxygen plasma on the chemical composition and morphology
of the Ru capping layer of the extreme ultraviolet mask blanks
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 52nd International Conference on Electron, Ion and Photon Beam
Technology and Nanofabrication
CY MAY 27-30, 2008
CL Portland, OR
DE atomic force microscopy; chemical interdiffusion; chemisorption;
etching; masks; oxidation; plasma materials processing; ruthenium;
surface morphology; surface roughness; transmission electron microscopy;
ultraviolet lithography; X-ray photoelectron spectra
ID RUTHENIUM; OXIDATION; NANOPARTICLES; LITHOGRAPHY; SURFACE; GROWTH
AB Contamination removal from extreme ultraviolet (EUV) mask surfaces is one of the most important aspects to improve reliability for the next generation of EUV lithography. The authors report chemical and morphological changes of the ruthenium (Ru) mask surface after oxygen plasma treatment using surface sensitive analytical methods: x-ray photoelectron spectroscopy (XPS), atomic force microscopy, and transmission electron microscopy (TEM). Chemical analysis of the EUV masks shows an increase in the subsurface oxygen concentration, Ru oxidation, and surface roughness. XPS spectra at various photoelectron takeoff angles suggest that the EUV mask surface was covered with chemisorbed oxygen after oxygen plasma treatment. It is proposed that the Kirkendall effect is the most plausible mechanism that explains the Ru surface oxidation. The etching rate of the Ru capping layer by oxygen plasma was estimated to be 1.5 +/- 0.2 A/min, based on TEM cross sectional analysis.
C1 [Belau, Leonid; Somorjai, Gabor A.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Park, Jeong Y.; Somorjai, Gabor A.] Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA.
[Somorjai, Gabor A.] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Liang, Ted] Intel Corp, Components Res Technol & Mfg Grp, Santa Clara, CA 95054 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
NR 19
TC 9
Z9 9
U1 1
U2 6
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD NOV
PY 2008
VL 26
IS 6
BP 2225
EP 2229
DI 10.1116/1.3021368
PG 5
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 379GV
UT WOS:000261385600073
ER
PT J
AU Anderson, CN
Naulleau, PP
Niakoula, D
Hassanein, E
Brainard, R
Gallatin, G
Dean, K
AF Anderson, Christopher N.
Naulleau, Patrick P.
Niakoula, Dimitra
Hassanein, Elsayed
Brainard, Robert
Gallatin, Gregg
Dean, Kim
TI Influence of base and photoacid generator on deprotection blur in
extreme ultraviolet photoresists and some thoughts on shot noise
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 52nd International Conference on Electron, Ion and Photon Beam
Technology and Nanofabrication
CY MAY 27-30, 2008
CL Portland, OR
DE nanopatterning; photoresists; ultraviolet lithography
ID RESOLUTION; LITHOGRAPHY
AB A contact-hole deprotection blur metric has been used to monitor the deprotection blur of an experimental open platform resist (EH27) as the wt % of base and photoacid generator (PAG) were varied. A six times increase in base wt % is shown to reduce the size of successfully patterned 1:1 line-space features from 52 to 39 nm without changing deprotection blur. Corresponding isolated line edge roughness is reduced from 6.9 to 4.1 nm. A two times increase in PAG wt % is shown to improve 1:1 line-space patterning from 47 to 40 nm without changing deprotection blur or isolated line edge roughness. A discussion of improved patterning performance as related to shot noise and deprotection blur concludes with a speculation that the spatial distribution of PAG molecules has been playing some role, perhaps a dominant one, in determining the uniformity of photogenerated acids in the resists that have been studied.
C1 [Anderson, Christopher N.] Univ Calif Berkeley, Appl Sci & Technol Grad Grp, Berkeley, CA 94704 USA.
[Naulleau, Patrick P.; Niakoula, Dimitra] Lawrence Berkeley Natl Lab, Ctr Xray Opt, Berkeley, CA 94704 USA.
[Naulleau, Patrick P.; Hassanein, Elsayed; Brainard, Robert] SUNY Albany, Coll Nanoscale Sci & Engn, Albany, NY 12203 USA.
[Dean, Kim] SEMATECH, Austin, TX 78741 USA.
RP Anderson, CN (reprint author), Univ Calif Berkeley, Appl Sci & Technol Grad Grp, Berkeley, CA 94704 USA.
EM cnanderson@berkeley.edu
RI Gallatin, Gregg/H-1998-2012
NR 17
TC 7
Z9 7
U1 0
U2 2
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD NOV
PY 2008
VL 26
IS 6
BP 2295
EP 2299
DI 10.1116/1.2968615
PG 5
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 379GV
UT WOS:000261385600086
ER
PT J
AU Weis, CD
Schuh, A
Batra, A
Persaud, A
Rangelow, IW
Bokor, J
Lo, CC
Cabrini, S
Sideras-Haddad, E
Fuchs, GD
Hanson, R
Awschalom, DD
Schenkel, T
AF Weis, C. D.
Schuh, A.
Batra, A.
Persaud, A.
Rangelow, I. W.
Bokor, J.
Lo, C. C.
Cabrini, S.
Sideras-Haddad, E.
Fuchs, G. D.
Hanson, R.
Awschalom, D. D.
Schenkel, T.
TI Single atom doping for quantum device development in diamond and silicon
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 52nd International Conference on Electron, Ion and Photon Beam
Technology and Nanofabrication
CY MAY 27-30, 2008
CL Portland, OR
DE atomic force microscopy; diamond; elemental semiconductors; ion beam
applications; ion sources; quantum interference devices; semiconductor
doping; silicon; transients
ID INTEGRATION; CENTERS
AB The ability to inject dopant atoms with high spatial resolution, flexibility in dopant species, and high single ion detection fidelity opens opportunities for the study of dopant fluctuation effects and the development of devices in which function is based on the manipulation of quantum states in single atoms, such as proposed quantum computers. The authors describe a single atom injector, in which the imaging and alignment capabilities of a scanning force microscope (SFM) are integrated with ion beams from a series of ion sources and with sensitive detection of current transients induced by incident ions. Ion beams are collimated by a small hole in the SFM tip and current changes induced by single ion impacts in transistor channels enable reliable detection of single ion hits. They discuss resolution limiting factors in ion placement and processing and paths to single atom (and color center) array formation for systematic testing of quantum computer architectures in silicon and diamond.
C1 [Weis, C. D.; Schuh, A.; Batra, A.; Persaud, A.; Schenkel, T.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94114 USA.
[Weis, C. D.; Schuh, A.; Rangelow, I. W.] Tech Univ Ilmenau, D-98684 Ilmenau, Germany.
[Bokor, J.; Lo, C. C.] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA.
[Bokor, J.; Cabrini, S.] Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA.
[Sideras-Haddad, E.] Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa.
[Fuchs, G. D.; Awschalom, D. D.] Univ Calif Santa Barbara, Ctr Spintron & Quantum Computat, Santa Barbara, CA 93106 USA.
[Hanson, R.] Delft Univ Technol, Kavli Inst Nanosci, Delft, Netherlands.
RP Weis, CD (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94114 USA.
EM t_schenkel@LBL.gov
RI Hanson, Ronald/B-9555-2008; Bokor, Jeffrey/A-2683-2011
NR 21
TC 34
Z9 34
U1 0
U2 11
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD NOV
PY 2008
VL 26
IS 6
BP 2596
EP 2600
DI 10.1116/1.2968614
PG 5
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 379GV
UT WOS:000261385600145
ER
PT J
AU Ocola, LE
Tirumala, VR
AF Ocola, L. E.
Tirumala, V. R.
TI Nanofabrication of super-high-aspect-ratio structures in hydrogen
silsesquioxane from direct-write e-beam lithography and hot development
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 52nd International Conference on Electron, Ion and Photon Beam
Technology and Nanofabrication
CY MAY 27-30, 2008
CL Portland, OR
DE electron beam lithography; micromechanical devices; Monte Carlo methods;
nanolithography; nanopatterning; organic compounds; resists; surface
tension; zone plates
ID MECHANICAL-PROPERTIES; FILMS; TEMPERATURE; RESISTS
AB Super-high-aspect-ratio structures (>10) in hydrogen silsesquioxane resist using direct write electron beam lithography at 100 kV and hot development and rinse are reported. Posts of 100 nm in width and 1.2 mu m tall have been successfully fabricated without the need of supercritical drying. Hot rinse solution with isopropyl alcohol has been used to reduce surface tension effects during drying. Dose absorption effects have been observed and modeled using known Monte Carlo models. These results indicate that for e-beam exposures of thick negative resists (>1 mu m), the bottom of the structures will have less cross-link density and therefore will be less stiff than the top. These results will have impact in the design of high-aspect-ratio structures that can be used in microelectromechanical system devices and high-aspect-ratio Fresnel zone plates.
C1 [Ocola, L. E.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60559 USA.
[Tirumala, V. R.] Natl Inst Stand & Technol, Div Polymers, Gaithersburg, MD 20878 USA.
RP Ocola, LE (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60559 USA.
EM ocola@anl.gov
NR 16
TC 8
Z9 9
U1 2
U2 5
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD NOV
PY 2008
VL 26
IS 6
BP 2632
EP 2635
DI 10.1116/1.3021395
PG 4
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 379GV
UT WOS:000261385600152
ER
PT J
AU Aggarwal, R
Narayan, RJ
Xiao, K
Geohegan, DB
AF Aggarwal, Ravi
Narayan, Roger J.
Xiao, Kai
Geohegan, David B.
TI Fabrication of Ag-tetracyanoquinodimethane nanostructures using ink-jet
printing/vapor-solid chemical reaction process
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Letter
DE ink jet printers; nanoparticles; nanopatterning; organic compounds;
scanning electron microscopy; silver
ID TCNQ THIN-FILMS; SOLUTION ROUTES; NANOWIRES; GROWTH; TEMPERATURE;
MICROSCOPY; MECHANISM; TRACKS
AB In this study, microscale patterns of the charge-transfer organic compound silver-tetracyanoquinodimethane (Ag-TCNQ) were prepared using a novel two-step ink-jet printing/vapor-solid chemical reaction process. First, silver nanoparticles were patterned on silicon using a piezoelectric ink-jet printer. Ag-TCNQ nanostructures were then processed on these patterned surfaces using a vapor-solid chemical reaction growth process. Scanning electron microscopy revealed that 50-100 nm wide, similar to 2 mu m long Ag-TCNQ nanocones, crystallites, and ribbons were fabricated using this two-step process. Patterns with a higher number density of silver nanoparticles demonstrated a greater number of nanocone structures. Micro-Raman spectroscopy results confirmed charge transfer between silver and TCNQ in the Ag-TCNQ nanostructure. Patterned Ag-TCNQ nanostructures fabricated using this novel two-step ink-jet printing/vapor-solid chemical reaction process could find use in high density, high-speed optical memory devices, magnetic devices, field effect transistors, organic light emitting diodes, metal/insulator/metal photoswitches, biosensors, and other advanced devices.
C1 [Aggarwal, Ravi; Narayan, Roger J.] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA.
[Xiao, Kai; Geohegan, David B.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
[Aggarwal, Ravi; Narayan, Roger J.] Univ N Carolina, Joint Dept Biomed Engn, Chapel Hill, NC 27599 USA.
[Aggarwal, Ravi; Narayan, Roger J.] N Carolina State Univ, Chapel Hill, NC 27599 USA.
[Geohegan, David B.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Narayan, RJ (reprint author), N Carolina State Univ, Dept Mat Sci & Engn, Box 7907, Raleigh, NC 27695 USA.
EM roger_narayan@unc.edu
RI Xiao, Kai/A-7133-2012; Narayan, Roger/J-2789-2013; Geohegan,
David/D-3599-2013
OI Xiao, Kai/0000-0002-0402-8276; Narayan, Roger/0000-0002-4876-9869;
Geohegan, David/0000-0003-0273-3139
NR 29
TC 2
Z9 2
U1 1
U2 11
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD NOV
PY 2008
VL 26
IS 6
BP L48
EP L52
DI 10.1116/1.3021027
PG 5
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 379GV
UT WOS:000261385600002
ER
PT J
AU Ostfeld, A
Uber, JG
Salomons, E
Berry, JW
Hart, WE
Phillips, CA
Watson, JP
Dorini, G
Jonkergouw, P
Kapelan, Z
di Pierro, F
Khu, ST
Savic, D
Eliades, D
Polycarpou, M
Ghimire, SR
Barkdoll, BD
Gueli, R
Huang, JJ
McBean, EA
James, W
Krause, A
Leskovec, J
Isovitsch, S
Xu, JH
Guestrin, C
VanBriesen, J
Small, M
Fischbeck, P
Preis, A
Propato, M
Piller, O
Trachtman, GB
Wu, ZY
Walski, T
AF Ostfeld, Avi
Uber, James G.
Salomons, Elad
Berry, Jonathan W.
Hart, William E.
Phillips, Cindy A.
Watson, Jean-Paul
Dorini, Gianluca
Jonkergouw, Philip
Kapelan, Zoran
di Pierro, Francesco
Khu, Soon-Thiam
Savic, Dragan
Eliades, Demetrios
Polycarpou, Marios
Ghimire, Santosh R.
Barkdoll, Brian D.
Gueli, Roberto
Huang, Jinhui J.
McBean, Edward A.
James, William
Krause, Andreas
Leskovec, Jure
Isovitsch, Shannon
Xu, Jianhua
Guestrin, Carlos
VanBriesen, Jeanne
Small, Mitchell
Fischbeck, Paul
Preis, Ami
Propato, Marco
Piller, Olivier
Trachtman, Gary B.
Wu, Zheng Yi
Walski, Tom
TI The Battle of the Water Sensor Networks (BWSN): A Design Challenge for
Engineers and Algorithms
SO JOURNAL OF WATER RESOURCES PLANNING AND MANAGEMENT
LA English
DT Article
ID SYSTEM
AB Following the events of September 11, 2001, in the United States, world public awareness for possible terrorist attacks on water supply systems has increased dramatically. Among the different threats for a water distribution system, the most difficult to address is a deliberate chemical or biological contaminant injection, due to both the uncertainty of the type of injected contaminant and its consequences, and the uncertainty of the time and location of the injection. An online contaminant monitoring system is considered as a major opportunity to protect against the impacts of a deliberate contaminant intrusion. However, although optimization models and solution algorithms have been developed for locating sensors, little is known about how these design algorithms compare to the efforts of human designers, and thus, the advantages they propose for practical design of sensor networks. To explore these issues, the Battle of the Water Sensor Networks (BWSN) was undertaken as part of the 8th Annual Water Distribution Systems Analysis Symposium, Cincinnati, Ohio, August 27-29, 2006. This paper summarizes the outcome of the BWSN effort and suggests future directions for water sensor networks research and implementation.
C1 [Ostfeld, Avi] Technion Israel Inst Technol, Fac Civil & Environm Engn, IL-32000 Haifa, Israel.
[Uber, James G.] Univ Cincinnati, Dept Civil & Environm Engn, Cincinnati, OH 45221 USA.
[Salomons, Elad] OptiWater, IL-34385 Haifa, Israel.
[Berry, Jonathan W.; Hart, William E.; Phillips, Cindy A.; Watson, Jean-Paul] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Dorini, Gianluca; Jonkergouw, Philip; Kapelan, Zoran; di Pierro, Francesco; Khu, Soon-Thiam; Savic, Dragan] Univ Exeter, Ctr Water Syst, Exeter EX4 4QF, Devon, England.
[Eliades, Demetrios; Polycarpou, Marios] Univ Cyprus, Dept Elect & Comp Engn, CY-1678 Nicosia, Cyprus.
[Ghimire, Santosh R.; Barkdoll, Brian D.] Michigan Technol Univ, Dept Civil & Environm Engn, Houghton, MI 49931 USA.
[Gueli, Roberto] Proteo SpA, I-95123 Catania, Italy.
[Huang, Jinhui J.; McBean, Edward A.; James, William] Univ Guelph, Sch Engn, Guelph, ON N1G 2W1, Canada.
[Krause, Andreas; Leskovec, Jure; Guestrin, Carlos] Carnegie Mellon Univ, Dept Comp Sci, Pittsburgh, PA 15213 USA.
[Isovitsch, Shannon; VanBriesen, Jeanne; Small, Mitchell] Carnegie Mellon Univ, Dept Civil & Environm Engn, Pittsburgh, PA 15213 USA.
[Xu, Jianhua; Small, Mitchell; Fischbeck, Paul] Carnegie Mellon Univ, Dept Engn & Publ Policy, Pittsburgh, PA 15213 USA.
[Fischbeck, Paul] Carnegie Mellon Univ, Dept Social & Decis Sci, Pittsburgh, PA 15213 USA.
[Preis, Ami] Technion Israel Inst Technol, Fac Civil & Environm Engn, IL-32000 Haifa, Israel.
[Propato, Marco; Piller, Olivier] Irstea, Hydraul & Civil Engn Res Unit, Bordeaux, France.
[Trachtman, Gary B.] Malcolm Pirnie Inc, Birmingham, AL 35205 USA.
[Wu, Zheng Yi; Walski, Tom] Bentley Syst Inc, Haestad Methods Solut Ctr, Watertown, CT 06795 USA.
RP Ostfeld, A (reprint author), Technion Israel Inst Technol, Fac Civil & Environm Engn, IL-32000 Haifa, Israel.
RI uber, james/E-7189-2010; Eliades, Demetrios/H-2417-2013; Kapelan,
Zoran/A-3103-2009; Savic, Dragan/G-2071-2012;
OI Eliades, Demetrios/0000-0001-6184-6366; Savic,
Dragan/0000-0001-9567-9041; Piller, Olivier/0000-0002-3625-7639
NR 24
TC 156
Z9 158
U1 7
U2 34
PU ASCE-AMER SOC CIVIL ENGINEERS
PI RESTON
PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
SN 0733-9496
EI 1943-5452
J9 J WATER RES PLAN MAN
JI J. Water Resour. Plan. Manage.-ASCE
PD NOV-DEC
PY 2008
VL 134
IS 6
BP 556
EP 568
DI 10.1061/(ASCE)0733-9496(2008)134:6(556)
PG 13
WC Engineering, Civil; Water Resources
SC Engineering; Water Resources
GA 361JQ
UT WOS:000260124300009
ER
PT J
AU Boeglin, WE
Itoh, A
Zheng, YX
Coffa, G
Howe, GA
Brash, AR
AF Boeglin, William E.
Itoh, Aya
Zheng, Yuxiang
Coffa, Gianguido
Howe, Gregg A.
Brash, Alan R.
TI Investigation of Substrate Binding and Product Stereochemistry Issues in
Two Linoleate 9-Lipoxygenases
SO LIPIDS
LA English
DT Article
DE Lipoxygenase; Stereochemistry; Linoleic acid; HODE; HPODE; Anandamide;
Arabidopsis; Tomato; Chiral analysis
ID CHIRAL COLUMN CHROMATOGRAPHY; ALLENE OXIDE SYNTHASE; SOYBEAN
LIPOXYGENASE-1; METHYL JASMONATE; ENANTIOMERIC SEPARATION; HYDROGEN
ABSTRACTION; ARACHIDONIC-ACID; POTATO-TUBER; OXYGENATION; ARABIDOPSIS
AB Herein we characterize the Arabidopsis thaliana AtLOX1 and tomato (Solanum lycopersicum) LOXA proteins as linoleate 9S-lipoxygenases (9-LOX), and use the enzymes to test a model that predicts a relationship between substrate binding orientation and product stereochemistry. The cDNAs were heterologously expressed in E. coli and the proteins partially purified by nickel affinity chromatography using a N-terminal (His)(6)-tag. Both enzymes oxygenated linoleic acid almost exclusively to the 9S-hydroperoxide with turnover numbers of 300-400/s. AtLOX1 showed a broad range of activity over the range pH 5-9 (optimal at pH 6); tomato LOXA also showed optimal activity around pH 5-7 dropping off more sharply at pH 9. Site-directed mutagenesis of a conserved active site Ala (Ala562 in AtLOX1, Ala 564 in tomato LOXA, and typically conserved as Ala in S-LOX and Gly in R-LOX), revealed that substitution with Gly led to the production of a mixture of 9S- and 13R-hydroperoxyoctadecadienoic acids from linoleic acid. To follow up on earlier reports of 9-LOX metabolism of anandamide (van Zadelhoff et al. Biochem. Biophys. Res. Commun. 248:33-38, 1998), we also tested this substrate with the mutants, which produced predictable shifts in product profile, including a shift from the prominent 11S-hydroperoxy derivative of wild-type to include the 15R-hydroperoxide. These results conform to a model that predicts a head-first substrate binding orientation for 9S-LOX. We also found that linoleoyl-phosphatidylcholine is not a 9S-LOX substrate, which is consistent with this conclusion.
C1 [Boeglin, William E.; Zheng, Yuxiang; Coffa, Gianguido; Brash, Alan R.] Vanderbilt Univ, Med Ctr, Dept Pharmacol, Nashville, TN 37232 USA.
[Itoh, Aya; Howe, Gregg A.] Michigan State Univ, US DOE, Plant Res Lab, E Lansing, MI 48824 USA.
[Howe, Gregg A.] Michigan State Univ, Dept Biochem & Mol Biol, E Lansing, MI 48824 USA.
RP Brash, AR (reprint author), Vanderbilt Univ, Med Ctr, Dept Pharmacol, RRB Room 510,23rd Ave Pierce, Nashville, TN 37232 USA.
EM alan.brash@vanderbilt.edu
FU NIH [GM-53638, GM-074888]; US Department of Energy [DE-FG02-91ER20021]
FX We thank Kaye Peterman (Wellesley College) for kindly proving the AtLOX1
cDNA. This work was supported by NIH grants GM-53638 and GM-074888 (to
ARB) and by the US Department of Energy Grant DE-FG02-91ER20021 (to
GAH).
NR 38
TC 20
Z9 22
U1 0
U2 7
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 0024-4201
J9 LIPIDS
JI Lipids
PD NOV
PY 2008
VL 43
IS 11
BP 979
EP 987
DI 10.1007/s11745-008-3230-1
PG 9
WC Biochemistry & Molecular Biology; Nutrition & Dietetics
SC Biochemistry & Molecular Biology; Nutrition & Dietetics
GA 367AZ
UT WOS:000260526200001
PM 18795358
ER
PT J
AU Ruppel, C
Boswell, R
Jones, E
AF Ruppel, C.
Boswell, R.
Jones, E.
TI Scientific results from Gulf of Mexico Gas Hydrates joint Industry
Project Leg 1 drilling: Introduction and overview
SO MARINE AND PETROLEUM GEOLOGY
LA English
DT Article
DE Gas hydrate; Hazard; Ocean drilling; Borehole; Gulf of Mexico
ID CONTINENTAL-SLOPE; MARINE-SEDIMENTS; SEA-FLOOR; EVOLUTION; FLUID
AB The Gulf of Mexico Gas Hydrates joint Industry Project (JIP) is a consortium of production and service companies and some government agencies formed to address the challenges that gas hydrates pose for deepwater exploration and production. In partnership with the U.S. Department of Energy and with scientific assistance from the U.S. Geological Survey and academic partners, the JIP has focused on studies to assess hazards associated with drilling the fine-grained, hydrate-bearing sediments that dominate much of the shallow subseafloor in the deepwater (>500 m) Gulf of Mexico. In preparation for an initial drilling, logging, and coring program, the JIP sponsored a multi-year research effort that included: (a) the development of borehole stability models for hydrate-bearing sediments; (b) exhaustive laboratory measurements of the physical properties of hydrate-bearing sediments; (c) refinement of new techniques for processing industry-standard 3-D seismic data to constrain gas hydrate saturations; and (d) construction of instrumentation to measure the physical properties of sediment cores that had never been removed from in situ hydrostatic pressure conditions. Following review of potential drilling sites, the JIP launched a 35-day expedition in Spring 2005 to acquire well logs and sediment cores at sites in Atwater Valley lease blocks 13/14 and Keathley Canyon lease block 151 in the northern Gulf of Mexico minibasin province. The Keathley Canyon site has a bottom simulating reflection at similar to 392 m below the seafloor, while the Atwater Valley location is characterized by seafloor mounds with an underlying upwarped seismic reflection consistent with upward fluid migration and possible shoaling of the base of the gas hydrate stability (BGHS). No gas hydrate was recovered at the drill sites, but logging data, and to some extent cores, suggest the occurrence of gas hydrate in inferred coarser-grained beds and fractures, particularly between 220 and 330 m below the seafloor at the Keathley Canyon site. This paper provides an overview of the results of the initial phases of the JIP work and introduces the 15 papers that make up this special volume on the scientific results related to the 2005 logging and drilling expedition. Published by Elsevier Ltd.
C1 [Ruppel, C.] US Geol Survey, Woods Hole, MA 02543 USA.
[Boswell, R.] US DOE, Natl Energy Technol Lab, Morgantown, WV 26507 USA.
[Jones, E.] Chevron Energy Technol Co, Houston, TX 77002 USA.
RP Ruppel, C (reprint author), US Geol Survey, 384 Woods Hole Rd, Woods Hole, MA 02543 USA.
EM cruppel@usgs.gov; ray.boswell@netl.doe.gov; ejones@chevron.com
OI Ruppel, Carolyn/0000-0003-2284-6632
FU U.S. Department of Energy [DE-FC26-01NT41330]
FX We thank the crew of the Uncle John and the shipboard scientific party
for their dedication in completing the drilling program and associated
analyses. We thank D. Hutchinson and B. Dugan for suggestions that
significantly improved the paper, B. Dugan and T. Collett for
clarification of cruise results and the cruise report, and D. Hutchinson
and W. Wood for contributing material for figures. EJ.'s participation
in this project was supported by the U.S. Department of Energy, under
award DE-FC26-01NT41330. However, any opinions, findings, conclusions,
or recommendations expressed herein are those of the authors and do not
necessarily reflect the views of the DOE or the USGS. Any use of a
trade, product, or firm names is for descriptive purposes only and does
not imply endorsement by the U.S. Government.
NR 73
TC 49
Z9 58
U1 4
U2 25
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0264-8172
J9 MAR PETROL GEOL
JI Mar. Pet. Geol.
PD NOV
PY 2008
VL 25
IS 9
BP 819
EP 829
DI 10.1016/j.marpetgeo.2008.02.007
PG 11
WC Geosciences, Multidisciplinary
SC Geology
GA 374FK
UT WOS:000261028400001
ER
PT J
AU Pereyra, RA
AF Pereyra, Ramiro A.
TI Delta to alpha prime transformation of plutonium during microhardness
testing
SO MATERIALS CHARACTERIZATION
LA English
DT Article
DE Plutonium; Phase transformation; Microhardness; Microstructure;
Metallography
AB Metallic plutonium is a complex material that can exist in six allotropic phases at ambient pressures; and under stress, it can transform martensitically from the ductile face centered cubic delta phase to the brittle monoclinic alpha prime phase. This investigation found that the pressures generated during microhardness indentation are sufficient for the transformation to occur. Micrographs showing the transformation as well as pressure calculations are presented in support for this finding. Also, based upon the amount of material displaced by the indenter, it was determined that there is at least a 16% error in published hardness values of the delta phase that can be attributed to the delta to alpha prime transformation. Published by Elsevier Inc.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Pereyra, RA (reprint author), Los Alamos Natl Lab, MST-16,POB 1663, Los Alamos, NM 87545 USA.
EM rpereyra@lanl.gov
NR 16
TC 2
Z9 2
U1 0
U2 3
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1044-5803
J9 MATER CHARACT
JI Mater. Charact.
PD NOV
PY 2008
VL 59
IS 11
BP 1675
EP 1681
DI 10.1016/j.matchar.2008.03.002
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Materials Science, Characterization & Testing
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 363UX
UT WOS:000260293500022
ER
PT J
AU Kalinin, SV
Rodriguez, BJ
Jesse, S
Maksymovych, P
Seal, K
Nikiforov, M
Baddorf, AP
Kholkin, AL
Proksch, R
AF Kalinin, Sergei V.
Rodriguez, Brian J.
Jesse, Stephen
Maksymovych, Peter
Seal, Katyayani
Nikiforov, Maxim
Baddorf, Arthur P.
Kholkin, Andrei L.
Proksch, Roger
TI Local bias-induced phase transitions
SO MATERIALS TODAY
LA English
DT Review
ID SCANNING PROBE MICROSCOPY; FERROELECTRIC DATA-STORAGE; THIN-FILMS;
DOMAIN-STRUCTURES; FORCE MICROSCOPY; SINGLE-CRYSTALS; NANOSCALE;
SURFACE; POLARIZATION; EVOLUTION
AB Electrical bias-induced phase transitions underpin a wide range of applications from data storage to energy generation and conversion. The mechanisms behind these transitions are often quite complex and in many cases are extremely sensitive to local defects that act as centers for local transformations or pinning. Using ferroelectrics as an example, we review methods for probing bias-induced phase transitions and discuss the current limitations and challenges for extending the methods to field-induced phase transitions and electrochemical reactions in energy storage, biological and molecular systems.
C1 [Kalinin, Sergei V.; Rodriguez, Brian J.; Jesse, Stephen; Maksymovych, Peter; Seal, Katyayani; Nikiforov, Maxim; Baddorf, Arthur P.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37922 USA.
[Kholkin, Andrei L.] Univ Aveiro, CICECO, Dept Ceram & Glass Engn, P-3810193 Aveiro, Portugal.
[Proksch, Roger] Asylum Res, Santa Barbara, CA 93117 USA.
RP Kalinin, SV (reprint author), Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37922 USA.
EM sergei2@ornl.gov
RI Kholkin, Andrei/G-5834-2010; Nikiforov, Maxim/C-1965-2012; Kalinin,
Sergei/I-9096-2012; Rodriguez, Brian/A-6253-2009; Maksymovych,
Petro/C-3922-2016; Jesse, Stephen/D-3975-2016; Baddorf,
Arthur/I-1308-2016
OI Kholkin, Andrei/0000-0003-3432-7610; Kalinin,
Sergei/0000-0001-5354-6152; Rodriguez, Brian/0000-0001-9419-2717;
Maksymovych, Petro/0000-0003-0822-8459; Jesse,
Stephen/0000-0002-1168-8483; Baddorf, Arthur/0000-0001-7023-2382
FU Scientific User Facilities Division, Office of Basic Energy Sciences, US
Department of Energy; Alexander von Humboldt Foundation; Portuguese
Foundation for Science and Technology [PTDC/FIS/81442/2006]; Scientec
withinjoint CICECO-Agilent PFM laboratory
FX Research at the Center for Nanophase Materials Sciences was supported by
the Scientific User Facilities Division, Office of Basic Energy
Sciences, US Department of Energy (S.V.K., B.J.R., S.J., P.M., K.S., and
A.P.B.). One of the authors (B.J.R.) acknowledges the financial support
of the Alexander von Humboldt Foundation. Thanks are also due to the
Portuguese Foundation for Science and Technology (project
PTDC/FIS/81442/2006) and to Scientec for the support within joint
CICECO-Agilent PFM laboratory (A.K.).
NR 108
TC 32
Z9 32
U1 3
U2 43
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1369-7021
EI 1873-4103
J9 MATER TODAY
JI Mater. Today
PD NOV
PY 2008
VL 11
IS 11
BP 16
EP 27
DI 10.1016/S1369-7021(08)70235-9
PG 12
WC Materials Science, Multidisciplinary
SC Materials Science
GA 382HB
UT WOS:000261595500011
ER
PT J
AU Messina, P
Pearson, J
Vasserman, I
Sasaki, S
Moog, E
Fradin, F
AF Messina, P.
Pearson, J.
Vasserman, I.
Sasaki, S.
Moog, E.
Fradin, F.
TI Scanning tunneling microscope design with a confocal small field
permanent magnet
SO MEASUREMENT SCIENCE AND TECHNOLOGY
LA English
DT Article
DE STM; RF electronics; RF STM
ID ELECTRON-SPIN-RESONANCE; MOLECULES; STM
AB The field of ultra-sensitive measurements with scanning probes requires the design and construction of novel instruments. For example, the combination of radio frequency detection and scanning probe can be exploited to measure thermal properties and mechanical resonances at a very low scale. Very recent results by Komeda and Manassen (2008 Appl. Phys. Lett. 92 212506) on the detection of spin noise with the scanning tunneling microscopy (STM) have further expanded previous results reported by one of the authors of this manuscript (Messina et al 2007 J. Appl. Phys. 101 053916). In a previous publication, one of the authors used a new STM instrument (Messina et al J. Appl. Phys. 2007 101 053916 and Mannini et al 2007 Inorg. Chim. Acta 360 3837-42) to obtain the detection of electron spin noise (ESN) from individual paramagnetic adsorbates. The magnetic field homogeneity at the STM tip-sample region was limited. Furthermore, vacuum operation of the STM microscope was limited by the heat dissipation at the electromagnet and the radio frequency (RF) recovery electronics. We report here on a new STM head that incorporates a specially designed permanent magnet and in-built RF amplification system. The magnet provides both a better field homogeneity and freedom to operate the instrument in vacuum. The STM microscope is vacuum compatible, and vertical stability has been improved over the previous design (Messina et al 2007 J. Appl. Phys. 101 053916), despite the presence of a heat dissipative RF amplifier in the close vicinity of the STM tip.
C1 [Messina, P.; Pearson, J.; Fradin, F.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Vasserman, I.; Sasaki, S.; Moog, E.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Messina, P (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM pmessina@anl.gov; pearson@anl.gov; isaac@aps.anl.gov;
sasaki@aps.anl.gov; moog@aps.anl.gov; ffradin@anl.gov
FU US Department of Energy, Basic Energy Sciences [DE-AC02-06CH11357]
FX We thank Curt Preissner and Branislav Brajuskovic at the Advanced Photon
Source for useful discussions. We thank G Kristou from the Material
Science Division mechanical workshop for his help in building the
various parts of the instrument. We thank Professor Manassen from Ben
Gurion University for useful discussions. Also we thank Stefano Prato
and Vittorio Spreafico from APE Research for their help in designing the
piezo tube actuator. This work was supported by the US Department of
Energy, Basic Energy Sciences under contract no DE-AC02-06CH11357.
NR 19
TC 2
Z9 2
U1 2
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-0233
EI 1361-6501
J9 MEAS SCI TECHNOL
JI Meas. Sci. Technol.
PD NOV
PY 2008
VL 19
IS 11
AR 115802
DI 10.1088/0957-0233/19/11/115802
PG 7
WC Engineering, Multidisciplinary; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 357DJ
UT WOS:000259826200034
ER
PT J
AU Rempe, JL
Knudson, DL
Daw, JE
Wilkins, SC
AF Rempe, J. L.
Knudson, D. L.
Daw, J. E.
Wilkins, S. C.
TI Type C thermocouple performance at 1500 degrees C
SO MEASUREMENT SCIENCE AND TECHNOLOGY
LA English
DT Article
DE high temperature sensors; type C thermocouples
AB Experience with Type C thermocouples operating for extended times in the 1400-1600 degrees C temperature range indicates that significant decalibration occurs, often leading to expensive downtime and material waste. As part of an effort to understand the mechanisms causing drift in these thermocouples, the Idaho National Laboratory conducted a long duration (3000 h) test at 1500 degrees C containing eight Type C thermocouples. As reported in this paper, results from this long duration test were adversely affected due to oxygen ingress. Nevertheless, results provide important insights about the impact of precipitate formation due to material phase changes on thermoelectric response. Post-test examinations indicate that the thermocouple signal was not adversely impacted by the formation of precipitates detected after 1000 h of heating at 1500 degrees C and suggest that the signal would not be adversely impacted by these precipitates for longer durations.
C1 [Rempe, J. L.; Knudson, D. L.; Daw, J. E.; Wilkins, S. C.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Rempe, JL (reprint author), Idaho Natl Lab, POB 1625,MS 3840, Idaho Falls, ID 83415 USA.
EM Joy.Rempe@inl.gov
OI Rempe, Joy/0000-0001-5527-3549
NR 15
TC 2
Z9 2
U1 2
U2 9
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-0233
EI 1361-6501
J9 MEAS SCI TECHNOL
JI Meas. Sci. Technol.
PD NOV
PY 2008
VL 19
IS 11
AR 115201
DI 10.1088/0957-0233/19/11/115201
PG 9
WC Engineering, Multidisciplinary; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 357DJ
UT WOS:000259826200006
ER
PT J
AU Raylman, RR
Smith, MF
Kinahan, PE
Majewski, S
AF Raylman, Raymond R.
Smith, Mark F.
Kinahan, Paul E.
Majewski, Stan
TI Quantification of radiotracer uptake with a dedicated breast PET imaging
system
SO MEDICAL PHYSICS
LA English
DT Article
DE nuclear medicine; specialized imagers; breast cancer
ID POSITRON EMISSION MAMMOGRAPHY; COMPUTED-TOMOGRAPHY; DETECTOR; SCATTER;
CANCER; DESIGN; BIOPSY; BRAIN
AB Tomographic breast imaging techniques can be used to quantify radiotracer uptake in breast and tumor tissue. However, physical processes common to PET imaging can confound accurate quantification. In this investigation, we assessed the effects of these phenomena and tested correction schemes for our new positron emission mammography-tomography system (PEM-PET). The PEM-PET scanner utilizes two sets of rotating planar detector heads. Each unit consists of a 4x3 array of Hamamatsu H8500 flat panel position sensitive photomultipliers coupled to a 96x72 array of 2x2x15 mm(3) LYSO detector elements (pitch=2.1 mm). Image reconstruction is performed with a 3D-OSEM algorithm parallelized to run on a multiprocessor computer system. The reconstructed field-of-view is 15x15x15 cm(3). Much of the testing procedures were based on NEMA-NU2/2001 protocols. Count rate losses due to pulse pile-up, image contamination due to acceptance of random coincidences and Compton scatter, and image artifacts produced by photon attenuation were measured. It was found that the system was susceptible to count rate losses when moderate levels of radiation were present in the scanner due to the current design of the event trigger electronics. Application of corrections for Compton scattering, photon attenuation and dead time resulted in improved estimations of (18)F concentration in simplified phantom studies. Results from these preliminary studies indicate that the PEM-PET scanner will be useful for the quantification of radiotracer uptake in breast tumors, possibly facilitating early assessment of cancer treatments. (C) 2008 American Association of Physicists in Medicine. [DOI: 10.1118/1.2990781]
C1 [Raylman, Raymond R.] W Virginia Univ, Dept Radiol, Ctr Adv Imaging, Morgantown, WV 26506 USA.
[Smith, Mark F.] Univ Maryland, Sch Med, Dept Diagnost Radiol & Nucl Med, Baltimore, MD 21214 USA.
[Kinahan, Paul E.] Univ Washington, Dept Radiol, Seattle, WA 98116 USA.
[Majewski, Stan] Thomas Jefferson Natl Accelerator Facil, Radiat Detect & Med Imaging Grp, Newport News, VA 23606 USA.
RP Raylman, RR (reprint author), W Virginia Univ, Dept Radiol, Ctr Adv Imaging, Morgantown, WV 26506 USA.
EM rraylman@wvu.edu
OI Kinahan, Paul/0000-0001-6461-3306
FU National Cancer Institute [R01CA094196]; Office of Science of the U. S.
Department of Energy
FX This work was supported by the National Cancer Institute (Grant No.
R01CA094196) and by the Office of Science of the U. S. Department of
Energy. Jefferson Science Associates, LLC operates the Thomas Jefferson
National Accelerator Facility for the U. S. Department of Energy under
U. S. DOE Contract No. DE-AC05-06OR23177.
NR 17
TC 7
Z9 7
U1 1
U2 5
PU AMER ASSOC PHYSICISTS MEDICINE AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0094-2405
J9 MED PHYS
JI Med. Phys.
PD NOV
PY 2008
VL 35
IS 11
BP 4989
EP 4997
DI 10.1118/1.2990781
PG 9
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA 366LZ
UT WOS:000260484400026
PM 19070233
ER
PT J
AU Wu, QY
Song, HJ
Swindeman, RW
Shingledecker, JP
Vasudevan, VK
AF Wu, Quanyan
Song, Hyojin
Swindeman, Robert W.
Shingledecker, John P.
Vasudevan, Vijay K.
TI Microstructure of long-term aged IN617Ni-base superalloy
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID CREEP-PROPERTIES; PHASE-STABILITY; ALLOY; INCONEL-617; PRECIPITATION;
BEHAVIOR; 1000-DEGREES-C; HELIUM
AB The microstructure of the Ni-base superalloy IN617 that had undergone prolonged aging (approximately 65,000 hours) at a series of temperatures from 482 degrees C to 871 degrees C has been characterized by microhardness measurements, optical microscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Cr23C6, Mo-rich eta-M6C, and Ti(C,N) constitute the major primary coarse precipitates both within the grains and along the grain boundaries. The secondary carbides were mostly fine Cr23C6, which had a cube-on-cube orientation relationship (OR) with the fcc matrix, and at long times were present in cuboidal and plate-shape forms within the grains and as films along the grain boundaries. Fine, eta-M6C carbides were also observed at low to intermediate temperatures with an OR given by [011] carbide//[011] matrix, ((1) over bar(1) over bar1) carbide//((1) over bar(1) over bar1) matrix. The coarse eta-M6C carbides increased in extent at 871 degrees C, whereas the counterpart fine carbides were absent. The gamma' phase was found to be present at all aging temperatures up to 871 degrees C, with a volume fraction ranging from very low to approximately 5 pct at 593 degrees C, where the peak in microhardness occurs. The observations have also suggested that the presence of a very small amount of gamma' at temperatures as high as 871 degrees C at long times may be associated with a reaction between the fine eta-carbides and the gamma matrix. Ultrafine precipitates of the intermetallic phase Ni-2(Cr,Mo) with the Pt2Mo-type structure was observed in addition to gamma' in samples aged for 28,300 hours at the lowest aging temperature of 482 degrees C. These precipitates were absent in samples aged at higher temperatures. The various observations made have suggested that the long-term thermal stability of the IN617 alloy is reasonably good over a wide temperature range of 538 degrees C to 704 degrees C, whereas at higher temperatures (871 degrees C), the substantial decrease in the volume fraction of gamma' and coarsening and clustering of the carbides lead to a large drop in the microhardness. A modified time-temperature-transformation (TTT) diagram was constructed based on the results of this study and comparison with previous reports.
C1 [Wu, Quanyan] ON Semicond, Phoenix, AZ 85008 USA.
[Song, Hyojin; Vasudevan, Vijay K.] Univ Cincinnati, Dept Chem & Mat Engn, Cincinnati, OH 45221 USA.
[Swindeman, Robert W.] Cromtech, Oak Ridge, TN 37831 USA.
[Shingledecker, John P.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Wu, QY (reprint author), ON Semicond, Phoenix, AZ 85008 USA.
EM vijay.vasudevan@uc.edu
NR 32
TC 67
Z9 77
U1 5
U2 47
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD NOV
PY 2008
VL 39A
IS 11
BP 2569
EP 2585
DI 10.1007/s11661-008-9618-y
PG 17
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 353MY
UT WOS:000259573300005
ER
PT J
AU De Moor, E
Lacroix, S
Clarke, AJ
Penning, J
Speer, JG
AF De Moor, E.
Lacroix, S.
Clarke, A. J.
Penning, J.
Speer, J. G.
TI Effect of retained austenite stabilized via quench and partitioning on
the strain hardening of martensitic steels
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID HIGH-STRENGTH STEELS; INTERFACE MIGRATION; CARBON-STEELS; P PROCESS;
TRANSFORMATION; NUCLEATION; KINETICS; TRIP
AB A novel heat-treating process, quench and partitioning (Q&P), has been proposed as a fundamentally new way to produce martensitic microstructures containing retained austenite. The two-step process hypothesizes carbon enrichment of the austenite by decarburization of the martensite. Significant amounts of retained austenite have been measured in the final microstructure, although evidence for transition carbide formation in the martensite also exists. The mechanical properties obtained via Q&P are reported for a CMnAlSiP steel after intercritical annealing for A50 specimens. Tensile strength/total elongation combinations, ranging from 800 MPa/> 25 pct to 900 MPa/20 pct to 1000 MPa/10 pct, indicate that Q&P is a viable way to produce high strength steel grades with good ductility. The instantaneous strain hardening of Q&P steels shows a significant dependence on the partitioning conditions applied. Lower partitioning temperature (PT) leads to continuously decreasing instantaneous n-values with strain, similar to the strain hardening behavior observed for dual-phase (DP) steels, whereas higher PTs for the same partitioning time increase the strain hardening significantly. After an initial increase, the observed n-values remain high up to considerable amounts of strain, resulting in similar strain hardening behavior observed for austempered transformation-induced plasticity (TRIP) grades. Assessment of the mechanical stability of the retained austenite indicates that the TRIP effect is effectively contributing to the increased strain hardening as function of strain.
C1 [De Moor, E.; Penning, J.] Univ Ghent, Dept Met & Mat Sci, Lab Iron & SteelMaking, B-9052 Zwijnaarde, Belgium.
[Lacroix, S.] Arcelor Mittal Res Ind Ghent OCAS NV, Arcelor Mittal Grp, B-9060 Zelzate, Belgium.
[Clarke, A. J.] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
[Speer, J. G.] Colorado Sch Mines, Adv Steel Proc & Prod Res Ctr, Golden, CO 80401 USA.
RP De Moor, E (reprint author), Univ Ghent, Dept Met & Mat Sci, Lab Iron & SteelMaking, B-9052 Zwijnaarde, Belgium.
EM emmanuel.demoor@ugent.be
RI de moor, emmanuel/E-9373-2012
OI de moor, emmanuel/0000-0001-6538-1121
FU Science and Technology in Flanders (IWT-Vlaanderen); Arcelor-Mittal
Research Industry Ghent (OCAS)
FX The Institute for the Promotion of Innovation through Science and
Technology in Flanders (IWT-Vlaanderen) is gratefully acknowledged for
funding this research. The support of Arcelor-Mittal Research Industry
Ghent (OCAS) and the sponsors of the Advanced Steel Processing and
Products Research Center (ASPPRC), an industry/university cooperative
research center at the Colorado School of Mines, is also gratefully
acknowledged. Special thanks go to Gary Zito, Bob McGrew, and Professor
S. W. Thompson for their support in TEM sample preparation and analysis.
NR 37
TC 85
Z9 91
U1 5
U2 42
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD NOV
PY 2008
VL 39A
IS 11
BP 2586
EP 2595
DI 10.1007/s11661-008-9609-z
PG 10
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 353MY
UT WOS:000259573300006
ER
PT J
AU Simon, SB
Joswiak, DJ
Ishii, HA
Bradley, JP
Chi, M
Grossman, L
Aleon, J
Brownlee, DE
Fallon, S
Hutcheon, ID
Matrajt, G
McKeegan, KD
AF Simon, S. B.
Joswiak, D. J.
Ishii, H. A.
Bradley, J. P.
Chi, M.
Grossman, L.
Aleon, J.
Brownlee, D. E.
Fallon, S.
Hutcheon, I. D.
Matrajt, G.
McKeegan, K. D.
TI A refractory inclusion returned by Stardust from comet 81P/Wild 2
SO METEORITICS & PLANETARY SCIENCE
LA English
DT Article
ID ALUMINUM-RICH INCLUSIONS; EARLY SOLAR-SYSTEM; ALLENDE METEORITE; OXYGEN
ISOTOPES; CARBONACEOUS CHONDRITES; INTERPLANETARY DUST; OUTWARD
TRANSPORT; CA-RICH; NEBULA; PARTICLES
AB Among the samples returned from comet 81P/Wild 2 by the Stardust spacecraft is a suite of particles from one impact track (Track 25) that are Ca-, Al-rich and FeO-free. We Studied three particles from this track that range in size from 5.3 x 3.2 mu m to 15 x 10 mu m. Scanning and transmission electron microscopy show that they consist of very fine-grained (typically from similar to 0.5 to similar to 2 mu m) Al-rich, Ti-bearing and Ti-free clinopyroxene, Mg-Al spinel and anorthite, with trace amounts of fine perovskite, FeNi metal and osbornite (TiN) grains. In addition to these phases, the terminal particle, named "Inti", also contains melilite. All of these phases, with the exception of osbornite, are common in refractory inclusions and are predicted to condense at high temperature from a gas of solar composition. Osbornite, though very rare, has also been found in meteoritic refractory inclusions, and could have formed in a region of the nebula where carbon became enriched relative to oxygen compared to solar composition. Compositions of Ti-pyroxene in Inti are similar, but not identical, to those of fassaite from Allende inclusions. Electron energy loss spectroscopy shows that Ti-rich pyroxene in Inti has Ti(3+)/Ti(4+) within the range of typical meteoritic fassaite, consistent with fori-nation under reducing conditions comparable to those of a system of solar composition. Inti is (16)O-rich, with delta(18)O approximate to delta(17)O approximate to-40 parts per thousand, like unaltered phases in refractory inclusions and refractory IDPs. With grain sizes, mineralogy, mineral chemistry, and an oxygen isotopic composition like those of refractory inclusions, we conclude that Inti is a refractory inclusion that formed in the inner solar nebula. Identification of a particle that formed in the inner solar system among the comet samples demonstrates that there was transport of materials from the inner to the outer nebula, probably either in a bipolar outflow or by turbulence.
C1 [Simon, S. B.; Grossman, L.] Univ Chicago, Dept Geophys Sci, Chicago, IL 60637 USA.
[Joswiak, D. J.; Brownlee, D. E.; Matrajt, G.] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
[Ishii, H. A.; Bradley, J. P.; Chi, M.; Fallon, S.; Hutcheon, I. D.] Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA.
[Chi, M.] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
[Grossman, L.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
[Aleon, J.; Hutcheon, I. D.] Lawrence Livermore Natl Lab, Glenn T Seaborg Inst, Livermore, CA 94551 USA.
[Aleon, J.] Ctr Spectrometrie Nucl & Spectrometrie Masse, F-91405 Orsay, France.
[Fallon, S.] Australian Natl Univ, RSES, SSAMS Radiocarbon Dating Lab, Canberra, ACT 0200, Australia.
[McKeegan, K. D.] Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA.
RP Simon, SB (reprint author), Univ Chicago, Dept Geophys Sci, 5734 S Ellis Ave, Chicago, IL 60637 USA.
EM sbs8@uchicago.edu
RI McKeegan, Kevin/A-4107-2008; Fallon, Stewart/G-6645-2011; Chi,
Miaofang/Q-2489-2015; UCLA, SIMS/A-1459-2011
OI McKeegan, Kevin/0000-0002-1827-729X; Fallon,
Stewart/0000-0002-8064-5903; Chi, Miaofang/0000-0003-0764-1567;
FU National Aeronautics and Space Administration (NASA) [NNG05GGOOG,
NNG05G177G, NNH06AD671, NNH04AB491]; SEGRF Fellowship; NSF
Instrumentation and Facilities Program
FX We thank F. Ciesla for helpful discussions. This work was supported by
the National Aeronautics and Space Administration (NASA) through grants
NNG05GGOOG (LG), NNG05G177G (LG), NNH06AD671 (JPB) and NNH04AB491 (JPB).
M. Chi is Supported by a SEGRF Fellowship at LLNL. Portions of this work
were 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 DE-AC52-07NA27344. The UCLA ion
microprobe laboratory is partially supported by a grant from the NSF
Instrumentation and Facilities Program. A. Brearley, T. Fagan and two
anonymous reviewers provided reviews that led to improvements in the
text. We are also very grateful to the Discovery and the Cosmochemistry
programs of NASA for funding and supporting the Stardust Mission.
NR 59
TC 70
Z9 70
U1 1
U2 19
PU METEORITICAL SOC
PI FAYETTEVILLE
PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 USA
SN 1086-9379
J9 METEORIT PLANET SCI
JI Meteorit. Planet. Sci.
PD NOV
PY 2008
VL 43
IS 11
BP 1861
EP 1877
PG 17
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 409MV
UT WOS:000263510700008
ER
PT J
AU Uribe, JD
Osorio, J
Barrero, CA
Girata, D
Morales, AL
Hoffmann, A
AF Uribe, J. D.
Osorio, J.
Barrero, C. A.
Girata, D.
Morales, A. L.
Hoffmann, A.
TI Physical properties in thin films of iron oxides
SO MICROELECTRONICS JOURNAL
LA English
DT Article
DE Thin films; Iron oxides; Mossbauer effect; Magnetization curves
AB We have grown hematite (alpha-Fe(2)O(3)) thin films on stainless steel substrates and magnetite (Fe(3)O(4)) thin films on (001)-Si single crystal substrates by a RF magnetron sputtering process. alpha-Fe(2)O(3) thin films were grown in an Ar atmosphere at substrate temperatures around 400 degrees C. and Fe(3)O(4) thin films in an Ar/O(2) reactive atmosphere at substrate temperatures around 500 degrees C. Conversion electron Mossbauer (CEM) spectra of alpha-Fe(2)O(3) thin films exhibit values for hyperfine parameter characteristic of the hematite stoichiometric phase in the weak ferromagnetic state [R.E. Vandenberghe, in; Mossbauer Spectroscopy and Applications in Geology, University Gent, Belgium, 1990 [1]. Furthermore, the relative line intensity ratio suggests that the magnetization vector of the polycrystalline film is aligned preferentially parallel to the surface. The CEM spectra of Fe(3)O(4) thin films show the presence of only the stoichiometric phase, and the values for the hyperfine fields and isomer shifts of the A and B sites are consistent with hulk Fe(3)O(4) [1]. The X-ray diffraction (XRD) pattern of the polycrystalline thin films also corresponds to),alpha-Fe(2)O(3) and Fe(3)O(4) [JCPDS X-ray diffraction data cards. 2001. [2]]. The samples were also analyzed by atomic force microscopy (AFM) and they reveal a grain morphology common for polycrystalline films. We found an average grain size of 211 nm and surface roughness of 45 nm in alpha-Fe(2)O(3) films, and an average grain size of 148 nm and surface roughness of 1.2 nm in Fe(3)O(4) films (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Uribe, J. D.; Osorio, J.; Barrero, C. A.; Girata, D.; Morales, A. L.] Univ Antioquia, Fac Ciencias Exactas & Nat, Inst Fis, Medellin, Colombia.
[Hoffmann, A.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Hoffmann, A.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Uribe, JD (reprint author), Univ Antioquia, Fac Ciencias Exactas & Nat, Inst Fis, AA 1226, Medellin, Colombia.
EM juribe@fisica.udea.edu.co
RI Hoffmann, Axel/A-8152-2009
OI Hoffmann, Axel/0000-0002-1808-2767
FU Colciencias [043-2005]; U.S. Department of Energy [DE-AC02-06CH11357]
FX This work was supported by the Excellence Center for Novel Materials
under Colciencias Contract 043-2005 and CODI Project Sostenibilidad
2007-2008 work at Argonne was supported by the U.S. Department of Energy
under Contract no. DE-AC02-06CH11357.
NR 5
TC 5
Z9 6
U1 3
U2 23
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0026-2692
J9 MICROELECTRON J
JI Microelectron. J.
PD NOV
PY 2008
VL 39
IS 11
SI SI
BP 1391
EP 1393
DI 10.1016/j.mejo.2008.01.054
PG 3
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA 378BK
UT WOS:000261295900070
ER
PT J
AU Cappuccio, JA
Blanchette, CD
Sulchek, TA
Arroyo, ES
Kralj, JM
Hinz, AK
Kuhn, EA
Chromy, BA
Segelke, BW
Rothschild, KJ
Fletcher, JE
Katzen, F
Peterson, TC
Kudlicki, WA
Bench, G
Hoeprich, PD
Coleman, MA
AF Cappuccio, Jenny A.
Blanchette, Craig D.
Sulchek, Todd A.
Arroyo, Erin S.
Kralj, Joel M.
Hinz, Angela K.
Kuhn, Edward A.
Chromy, Brett A.
Segelke, Brent W.
Rothschild, Kenneth J.
Fletcher, Julia E.
Katzen, Federico
Peterson, Todd C.
Kudlicki, Wieslaw A.
Bench, Graham
Hoeprich, Paul D.
Coleman, Matthew A.
TI Cell-free Co-expression of Functional Membrane Proteins and
Apolipoprotein, Forming Soluble Nanolipoprotein Particles
SO MOLECULAR & CELLULAR PROTEOMICS
LA English
DT Article
ID FREE EXPRESSION; HIGH-THROUGHPUT; IN-VITRO; PHOSPHOLIPID-BILAYERS;
LIPID-BILAYERS; BACTERIORHODOPSIN; SPECTROSCOPY; RECONSTITUTION;
VESICLES; TRANSDUCIN
AB Here we demonstrate rapid production of solubilized and functional membrane protein by simultaneous cell-free expression of an apolipoprotein and a membrane protein in the presence of lipids, leading to the self-assembly of membrane protein-containing nanolipoprotein particles (NLPs). NLPs have shown great promise as a biotechnology platform for solubilizing and characterizing membrane proteins. However, current approaches are limited because they require extensive efforts to express, purify, and solubilize the membrane protein prior to insertion into NLPs. By the simple addition of a few constituents to cell-free extracts, we can produce membrane proteins in NLPs with considerably less effort. For this approach an integral membrane protein and an apolipoprotein scaffold are encoded by two DNA plasmids introduced into cell-free extracts along with lipids. For this study reported here we used plasmids encoding the bacteriorhodopsin (bR) membrane apoprotein and scaffold protein Delta 1-49 apolipoprotein A-I fragment (Delta 49A1). Cell free co-expression of the proteins encoded by these plasmids, in the presence of the cofactor all-trans-retinal and dimyristoylphosphatidylcholine, resulted in production of functional bR as demonstrated by a 5-nm shift in the absorption spectra upon light adaptation and characteristic time-resolved FT infrared difference spectra for the bR 3 M transition. Importantly the functional bR was solubilized in discoidal bR.NLPs as determined by atomic force microscopy. A survey study of other membrane proteins co-expressed with Delta 49A1 scaffold protein also showed significantly increased solubility of all of the membrane proteins, indicating that this approach may provide a general method for expressing membrane proteins enabling further studies. Molecular & Cellular Proteomics 7: 2246-2253, 2008.
C1 [Cappuccio, Jenny A.; Blanchette, Craig D.; Sulchek, Todd A.; Arroyo, Erin S.; Hinz, Angela K.; Kuhn, Edward A.; Chromy, Brett A.; Segelke, Brent W.; Bench, Graham; Hoeprich, Paul D.; Coleman, Matthew A.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Fletcher, Julia E.; Katzen, Federico; Peterson, Todd C.; Kudlicki, Wieslaw A.] Invitrogen Corp, Carlsbad, CA 92008 USA.
[Kralj, Joel M.; Rothschild, Kenneth J.] Boston Univ, Dept Phys, Boston, MA 02215 USA.
[Kralj, Joel M.; Rothschild, Kenneth J.] Boston Univ, Photon Ctr, Boston, MA 02215 USA.
RP Coleman, MA (reprint author), Lawrence Livermore Natl Lab, Biosci & Biotechnol Div, POB 808,L-452, Livermore, CA 94551 USA.
EM coleman16@llnl.gov
OI Coleman, Matthew/0000-0003-1389-4018
FU National Institutes of Health [R01GM069969]; United States Department of
Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344];
Laboratory Directed Research and Development Office [06-SI-003,
LLNL-JRNL-401933]
FX This work was supported, in whole or in part, by National Institutes of
Health Grant R01GM069969 ( to K. J. R.). This work was also performed
under the auspices of the United States Department of Energy by Lawrence
Livermore National Laboratory under Contract DE-AC52-07NA27344 with
support from the Laboratory Directed Research and Development Office
(06-SI-003, LLNL-JRNL-401933 to P. D. H.). The costs of publication of
this article were defrayed in part by the payment of page charges. This
article must therefore be hereby marked "advertisement" in accordance
with 18 U. S. C. Section 1734 solely to indicate this fact.
NR 47
TC 54
Z9 55
U1 1
U2 20
PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA
SN 1535-9476
J9 MOL CELL PROTEOMICS
JI Mol. Cell. Proteomics
PD NOV
PY 2008
VL 7
IS 11
BP 2246
EP 2253
DI 10.1074/mcp.M800191-MCP200
PG 8
WC Biochemical Research Methods
SC Biochemistry & Molecular Biology
GA 372HV
UT WOS:000260893600013
PM 18603642
ER
PT J
AU Anderson, SJ
Stone, CL
Posada-Buitrago, ML
Boore, JL
Neelam, BA
Stephens, RM
Luster, DG
Frederick, RD
Pedley, KF
AF Anderson, Sharon J.
Stone, Christine L.
Posada-Buitrago, Martha Lucia
Boore, Jeffrey L.
Neelam, Beena A.
Stephens, Robert M.
Luster, Douglas G.
Frederick, Reid D.
Pedley, Kerry F.
TI Development of simple sequence repeat markers for the soybean rust
fungus, Phakopsora pachyrhizi
SO MOLECULAR ECOLOGY RESOURCES
LA English
DT Article
DE basidiomycetes; microsatellites; Phakopsora pachyrhizi; soybean rust;
SSR
AB Twenty-four simple sequence repeat markers were developed for Phakopsora pachyrhizi, a fungal pathogen of soybean (Glycine max) and other legumes. All 24 of the loci were evaluated on 28 isolates of P. pachyrhizi. Twenty-one loci were polymorphic, with allelic diversity ranging from two to eight alleles, and null alleles were observed for eight of the 24 loci. A preliminary screen with the closely related species, P. meibomiae, indicated that these primer pairs are specific to P. pachyrhizi.
C1 [Anderson, Sharon J.; Stone, Christine L.; Luster, Douglas G.; Frederick, Reid D.; Pedley, Kerry F.] USDA ARS, Foreign Dis Weed Sci Res Unit, Ft Detrick, MD 21702 USA.
[Posada-Buitrago, Martha Lucia; Boore, Jeffrey L.] Joint Genome Inst, Walnut Creek, CA 94598 USA.
[Posada-Buitrago, Martha Lucia; Boore, Jeffrey L.] Lawrence Berkeley Natl Lab, US Dept Energy, Walnut Creek, CA USA.
[Neelam, Beena A.; Stephens, Robert M.] NCI Frederick, SAIC Frederick Inc, Adv Biomed Comp Ctr, Adv Technol Program, Ft Detrick, MD 21702 USA.
RP Pedley, KF (reprint author), USDA ARS, Foreign Dis Weed Sci Res Unit, Ft Detrick, MD 21702 USA.
EM kerry.pedley@ars.usda.gov
RI Moreira, Eder/B-2309-2010; POSADA, MARTHA/G-7927-2012
NR 8
TC 8
Z9 9
U1 1
U2 2
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 1755-098X
J9 MOL ECOL RESOUR
JI Mol. Ecol. Resour.
PD NOV
PY 2008
VL 8
IS 6
BP 1310
EP 1312
DI 10.1111/j.1755-0998.2008.02272.x
PG 3
WC Biochemistry & Molecular Biology; Ecology; Evolutionary Biology
SC Biochemistry & Molecular Biology; Environmental Sciences & Ecology;
Evolutionary Biology
GA 367BY
UT WOS:000260528700027
PM 21586030
ER
PT J
AU Hickman, CR
Peters, MB
Crawford, NG
Hagen, C
Glenn, TSC
Somers, CM
AF Hickman, Caleb R.
Peters, Maureen B.
Crawford, Nicholas G.
Hagen, Cris
Glenn, Travi S. C.
Somers, Christopher M.
TI Development and characterization of microsatellite loci in the American
white pelican (Pelecanus erythrorhynchos)
SO MOLECULAR ECOLOGY RESOURCES
LA English
DT Article
DE American white pelican; microsatellites; PCR; Pelecanus erythrorhynchos;
population structure; primers
AB We isolated and characterized nine microsatellite loci from the American white pelican, Pelecanus erythrorhynchos. The loci were screened in 23 individuals from the eastern and western populations of North America and were polymorphic, with the number of alleles per locus ranging from two to eight. Polymorphic information content ranged from 0.185 to 0.820 and observed heterozygosity from 0.217 to 0.957. These new loci will provide tools for studies of population structure in this species, thereby aiding conservation planning.
C1 [Somers, Christopher M.] Univ Regina, Dept Biol, Regina, SK S4S 0A2, Canada.
[Hickman, Caleb R.; Peters, Maureen B.; Crawford, Nicholas G.; Hagen, Cris; Glenn, Travi S. C.] Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA.
[Glenn, Travi S. C.] Univ Georgia, Dept Environm Hlth Sci, Athens, GA 30602 USA.
RP Somers, CM (reprint author), Univ Regina, Dept Biol, Regina, SK S4S 0A2, Canada.
EM chris.somers@uregina.ca
FU Department of Energy award [DE-FC09-07SR22506]; Saskatchewan
Environment's Fish and Wildlife Development Fund, the Canadian Wildlife
Service; University of Regina
FX This work was supported by Department of Energy award DE-FC09-07SR22506
to the University of Georgia, and funds awarded to C.M.S. through
Saskatchewan Environment's Fish and Wildlife Development Fund, the
Canadian Wildlife Service, and the University of Regina. We thank V.
Kjoss and the volunteers who collected tissue samples.
NR 9
TC 4
Z9 4
U1 1
U2 1
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 1755-098X
J9 MOL ECOL RESOUR
JI Mol. Ecol. Resour.
PD NOV
PY 2008
VL 8
IS 6
BP 1439
EP 1441
DI 10.1111/j.1755-0998.2008.02191.x
PG 3
WC Biochemistry & Molecular Biology; Ecology; Evolutionary Biology
SC Biochemistry & Molecular Biology; Environmental Sciences & Ecology;
Evolutionary Biology
GA 367BY
UT WOS:000260528700066
PM 21586069
ER
PT J
AU Zhang, XC
Hu, JP
AF Zhang, Xin-Chun
Hu, Jian-Ping
TI FISSION1A and FISSION1B Proteins Mediate the Fission of Peroxisomes and
Mitochondria in Arabidopsis
SO MOLECULAR PLANT
LA English
DT Article
DE peroxisomal and mitochondrial fission; Arabidopsis; FIS1 protein
ID DYNAMIN-RELATED PROTEINS; PLANT PEROXISOMES; SACCHAROMYCES-CEREVISIAE;
MAMMALIAN-CELLS; DIVISION; PROLIFERATION; BIOGENESIS; FIS1; THALIANA;
ADL2B
AB Peroxisomes and mitochondria are metabolically diverse organelles that act in concert in a number of pathways in eukaryotes, including photorespiration and lipid mobilization in plants. The division machineries of these two types of organelles also share several components such as dynamin-related proteins (DRPs) and their organelle anchor, the FISSION1 (FIS1) protein. In Arabidopsis, members of the DRP3 and FIS1 small protein families, namely DRP3A, DRP3B, FIS1A and FIS1B, are each dual-targeted to peroxisomes and mitochondria and are required for the division of both organelles; DRP3A and DRP38 are partially redundant in function. To further determine the contribution of FIS1A and FIS1B to the division of peroxisomes and mitochondria, we analyzed plants overexpressing FIS1A or FIS1B and mutants in which the functions of both proteins were disrupted. Domains in FIS1A and FIS1B required for peroxisomal targeting were also dissected. Our results demonstrate that FIS1A and FIS1B play rate-limiting and partially overlapping roles in promoting the fission of peroxisomes and mitochondria. Furthermore, although the C-terminus of FIS1 is both necessary and sufficient for targeting to peroxisomes, the role of the short C-terminal segment adjacent to the transmembrane domain may differ among diverse species in peroxisomal targeting.
C1 [Zhang, Xin-Chun; Hu, Jian-Ping] Michigan State Univ, MSU DOE Plant Res Lab, E Lansing, MI 48824 USA.
[Hu, Jian-Ping] Michigan State Univ, Dept Plant Biol, E Lansing, MI 48824 USA.
RP Hu, JP (reprint author), Michigan State Univ, MSU DOE Plant Res Lab, E Lansing, MI 48824 USA.
EM huji@msu.edu
FU US Department of Energy; National Science Foundation [MCB 0618335]
FX This work was supported by grants from the US Department of Energy and
the National Science Foundation (MCB 0618335) to J.H.
NR 46
TC 35
Z9 39
U1 0
U2 1
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 1674-2052
J9 MOL PLANT
JI Mol. Plant.
PD NOV
PY 2008
VL 1
IS 6
BP 1036
EP 1047
DI 10.1093/mp/ssn056
PG 12
WC Biochemistry & Molecular Biology; Plant Sciences
SC Biochemistry & Molecular Biology; Plant Sciences
GA 400HG
UT WOS:000262858000013
PM 19825601
ER
PT J
AU Correia, J
Arritt, RW
AF Correia, James, Jr.
Arritt, Raymond W.
TI Thermodynamic Properties of Mesoscale Convective Systems Observed during
BAMEX
SO MONTHLY WEATHER REVIEW
LA English
DT Article
ID MIDLATITUDE SQUALL LINE; HIGH-PLAINS CUMULONIMBI; STRATIFORM
PRECIPITATION; KINEMATIC STRUCTURE; DOPPLER RADAR; REAR-INFLOW; SURFACE
PRESSURE; TRANSITION ZONE; LIFE-CYCLE; BOW ECHOES
AB Dropsonde observations from the Bow Echo and Mesoscale Convective Vortex Experiment (BAMEX) are used to document the spatiotemporal variability of temperature, moisture, and wind within mesoscale convective systems (MCSs). Onion-type sounding structures are found throughout the stratiform region of MCSs, but the temperature and moisture variability is large. Composite soundings were constructed and statistics of thermodynamic variability were generated within each subregion of the MCS. The calculated air vertical velocity helped identify subsaturated downdrafts. It was found that lapse rates within the cold pool varied markedly throughout the MCS. Layered wet-bulb potential temperature profiles seem to indicate that air within the lowest several kilometers comes from a variety of source regions. It was also found that lapse-rate transitions across the 0 degrees C level were more common than isothermal, melting layers. The authors discuss the implications these findings have and how they can be used to validate future high-resolution numerical simulations of MCSs.
C1 [Correia, James, Jr.; Arritt, Raymond W.] Iowa State Univ, Dept Agron, Ames, IA USA.
RP Correia, J (reprint author), Pacific NW Natl Lab, POB 99, Richland, WA 99352 USA.
EM james.correia@pnl.gov
RI Correia, Jr, James/A-9455-2010
OI Correia, Jr, James/0000-0003-1092-8999
NR 65
TC 1
Z9 1
U1 0
U2 1
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0027-0644
J9 MON WEATHER REV
JI Mon. Weather Rev.
PD NOV
PY 2008
VL 136
IS 11
BP 4242
EP 4271
DI 10.1175/2008MWR2284.1
PG 30
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 371VX
UT WOS:000260861900014
ER
PT J
AU Meyer, JC
Kisielowski, C
Erni, R
Rossell, MD
Crommie, MF
Zettl, A
AF Meyer, Jannik C.
Kisielowski, C.
Erni, R.
Rossell, Marta D.
Crommie, M. F.
Zettl, A.
TI Direct Imaging of Lattice Atoms and Topological Defects in Graphene
Membranes
SO NANO LETTERS
LA English
DT Article
ID CARBON NANOTUBES; SCATTERING FACTORS; ABERRATION
AB We present a transmission electron microscopy investigation of graphene membranes, crystalline foils with a thickness of only I atom. By using aberration-correction in combination with a monochromator, 1-angstrom resolution is achieved at an acceleration voltage of only 80 kV. The low voltage is crucial for the stability of these membranes. As a result, every individual carbon atom in the field of view is detected and resolved. We observe a highly crystalline lattice along with occasional point defects. The formation and annealing of Stone-Wales defects is observed in situ. Multiple five- and seven-membered rings appear exclusively in combinations that avoid dislocations and disclinations, in contrast to previous observations on highly curved (tube- or fullerene-like) graphene surfaces.
C1 [Meyer, Jannik C.; Crommie, M. F.; Zettl, A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Meyer, Jannik C.; Crommie, M. F.; Zettl, A.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Kisielowski, C.; Erni, R.; Rossell, Marta D.] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
RP Zettl, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
EM azettl@berkeley.edu
RI Meyer, Jannik/H-8541-2012; Erni, Rolf/P-7435-2014; Zettl,
Alex/O-4925-2016; Rossell, Marta/E-9785-2017
OI Meyer, Jannik/0000-0003-4023-0778; Erni, Rolf/0000-0003-2391-5943;
Zettl, Alex/0000-0001-6330-136X;
FU Department of Energy [AC02-05CH11231]; Department of Energy, Office of
Science, Office of Basic Energy Sciences; U.S. Department of Energy
[DE-AC02-05CH11231]
FX NCEM is supported by the Department of Energy under contract no.
DE-AC02-05CH11231. The TEAM project is supported by the Department of
Energy, Office of Science, Office of Basic Energy Sciences. J.C.M.,
M.F., and A.Z. were 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, via the sp2-bonded nanostructures
program.
NR 28
TC 556
Z9 567
U1 32
U2 277
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD NOV
PY 2008
VL 8
IS 11
BP 3582
EP 3586
DI 10.1021/nl801386m
PG 5
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 372FX
UT WOS:000260888600006
PM 18563938
ER
PT J
AU Kim, TW
Chung, PW
Slowing, II
Tsunoda, M
Yeung, ES
Lin, VSY
AF Kim, Tae-Wan
Chung, Po-Wen
Slowing, Igor I.
Tsunoda, Makoto
Yeung, Edward S.
Lin, Victor S. -Y.
TI Structurally Ordered Mesoporous Carbon Nanoparticles as Transmembrane
Delivery Vehicle in Human Cancer Cells
SO NANO LETTERS
LA English
DT Article
ID SILICA NANOPARTICLES; DRUG-DELIVERY; NANOTUBES; TRANSPORTERS; RELEASE;
DNA; ADSORPTION; PROTEINS; NANOCAGE; CARRIERS
AB A structurally ordered, CMK-1 type mesoporous carbon nanoparticle (MCN) material was successfully synthesized by using a MCM-48 type mesoporous silica nanoparticle as template. The structure of MCN was analyzed by a series of different techniques, including the scanning and transmission electron microscopy, powder X-ray diffraction, and N-2 sorption analysis. To the best of our knowledge, no study has been reported prior to our investigation on the utilization of these structurally ordered mesoporous carbon nanoparticles for the delivery of membrane impermeable chemical agents inside of eukaryotic cells. The cellular uptake efficiency and biocompatibility of MCN with human cervical cancer cells (HeLa) were investigated. Our results show that the inhibitory concentration (IC50) value of MCN is very high (>50 mu g/mL per million cells) indicating that MCN is fairly biocompatible in vitro. Also, a membrane impermeable fluorescence dye, Fura-2, was loaded to the mesoporous matrix of MCN. We demonstrated that the MCN material could indeed serve as a transmembrane carrier for delivering Fura-2 through the cell membrane to release these molecules inside of live HeLa cells. We envision that further developments of this MCN material will lead to a new generation of nanodevices for transmembrane delivery and intracellular release applications.
C1 [Kim, Tae-Wan; Chung, Po-Wen; Slowing, Igor I.; Tsunoda, Makoto; Yeung, Edward S.; Lin, Victor S. -Y.] Iowa State Univ, US DOE, Ames Lab, Dept Chem, Ames, IA 50011 USA.
RP Lin, VSY (reprint author), Iowa State Univ, US DOE, Ames Lab, Dept Chem, Ames, IA 50011 USA.
EM vsylin@iastate.edu
RI Chung, Po-Wen/J-7476-2015;
OI Slowing, Igor/0000-0002-9319-8639
FU U.S. National Science Foundation [CHE-0239570, CHE-0809521]; U.S. DOE
Ames Laboratory through the office of Basic Energy Sciences
[DEAC02-07CH11358]
FX This study was supported by the U.S. National Science Foundation
(CHE-0239570 and CHE-0809521) and the U.S. DOE Ames Laboratory through
the office of Basic Energy Sciences under Contract No. DEAC02-07CH11358.
NR 33
TC 138
Z9 143
U1 7
U2 138
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD NOV
PY 2008
VL 8
IS 11
BP 3724
EP 3727
DI 10.1021/nl801976m
PG 4
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 372FX
UT WOS:000260888600030
PM 18954128
ER
PT J
AU Law, M
Beard, MC
Choi, S
Luther, JM
Hanna, MC
Nozik, AJ
AF Law, Matt
Beard, Matthew C.
Choi, Sukgeun
Luther, Joseph M.
Hanna, Mark C.
Nozik, Arthur J.
TI Determining the Internal Quantum Efficiency of PbSe Nanocrystal Solar
Cells with the Aid of an Optical Model
SO NANO LETTERS
LA English
DT Article
ID PHOTOVOLTAIC DEVICES; POLYMER; FILMS
AB We determine the internal quantum efficiency (IQE) of the active layer of PbSe nanocrystal (NC) back-contact Schottky solar cells by combining external quantum efficiency (EQE) and total reflectance measurements with an optical model of the device stack. The model is parametrized with the complex index of refraction of each layer in the stack as calculated from ellipsometry data. Good agreement between the experimental and modeled reflectance spectra permits a quantitative estimate of the fraction of incident light absorbed by the NC films at each wavelength, thereby yielding well-constrained QE spectra for photons absorbed only by the NCs. Using a series of devices fabricated from 5.1 +/- 0.4 nm diameter PbSe NCs, we show that thin NC cells achieve an EQE and an active layer IQE as high as 60 +/- 5% and 80 +/- 7%, respectively, while the QE of devices with NC layers thicker than about 150 nm falls, particularly in the blue, because of progressively greater light absorption in the field-free region of the films and enhanced recombination overall. Our results demonstrate that interference effects must be taken into account in order to calculate accurate optical generation profiles and IQE spectra for these thin film solar cells. The mixed modeling/experimental approach described here is a rigorous and powerful way to determine if multiple exciton generation (MEG) photocurrent is collected by devices with EQE < 100%. On the basis of the magnitudes and shapes of the IQE spectra, we conclude that the 1,2-ethanedithiol treated NC devices studied here do not produce appreciable MEG photocurrent.
C1 [Law, Matt; Beard, Matthew C.; Choi, Sukgeun; Luther, Joseph M.; Hanna, Mark C.; Nozik, Arthur J.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Law, M (reprint author), Univ Calif Irvine, Dept Chem, Irvine, CA 92717 USA.
EM matt.law@uci.edu
RI Choi, Sukgeun/J-2345-2014; Nozik, Arthur/A-1481-2012; Nozik,
Arthur/P-2641-2016;
OI BEARD, MATTHEW/0000-0002-2711-1355
FU U.S. DOE [DE-AC36-99-GO10337]
FX The authors thank Q. Song and B. Hughes for nanocrystal synthesis, B. To
for AFM, D. Levi for assistance with ellipsometry, and D. Ginley for use
of the glove boxes. M.C.B., J.M.L., and A.J.N. were supported by the
Chemical Sciences, Geosciences, and Biosciences Division of the Office
of Basic Energy Science of the U.S. DOE, contract DE-AC36-99-GO10337;
M.L. acknowledges support from the Energy Efficiency and Renewable
Energy Photovoltaics Program.; Correspondence and requests for materials
should be addressed to M.L. or M.C.B.
NR 21
TC 109
Z9 111
U1 1
U2 61
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD NOV
PY 2008
VL 8
IS 11
BP 3904
EP 3910
DI 10.1021/nl802353x
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 372FX
UT WOS:000260888600062
PM 18823149
ER
PT J
AU Graham, MW
Ma, YZ
Fleming, GR
AF Graham, Matthew W.
Ma, Ying-Zhong
Fleming, Graham R.
TI Femtosecond Photon Echo Spectroscopy of Semiconducting Single-Walled
Carbon Nanotubes
SO NANO LETTERS
LA English
DT Article
ID SOLVATION DYNAMICS; EXCITONS; PHOTOLUMINESCENCE; ENVIRONMENTS
AB Three-pulse photon echo peak shift measurements were performed on semiconducting single-walled carbon nanotubes embedded in polymer matrix at room temperature. Simultaneous modeling of the peak shift data in the limit of zero-intensity and the linear absorption spectrum enable us to extract an intrinsic homogeneous line width of 178 cm(-1), an inhomogeneous width of 698 cm(-1), and a Huang-Rhys factor of 0.04 for the radial breathing mode vibration. The peak shift data when combined with two-pulse photon echo and pump-probe measurements allows us to determine a pure exciton dephasing time scale of 78 fs at room temperature.
C1 [Fleming, Graham R.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Fleming, GR (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM GRFleming@lbl.gov
RI Ma, Yingzhong/L-6261-2016
OI Ma, Yingzhong/0000-0002-8154-1006
FU NSF; U.S. Department of Energy [DE-AC02-05CH11231]
FX This work is supported by NSF. The steady-state fluorescence spectra
reported in this work were measured at the Molecular Foundry, Lawrence
Berkeley National Laboratory, which is supported by the Office of
Science, Office of Basic Energy Sciences, of the U.S. Department of
Energy under Contract No. DE-AC02-05CH11231. We thank Prof. D.S. Larsen
for offering the source code used in our 3PEPS data simulation.
NR 38
TC 32
Z9 33
U1 0
U2 12
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD NOV
PY 2008
VL 8
IS 11
BP 3936
EP 3941
DI 10.1021/nl802423w
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 372FX
UT WOS:000260888600068
PM 18937517
ER
PT J
AU Tao, AR
Ceperley, DP
Sinsermsuksakul, P
Neureuther, AR
Yang, PD
AF Tao, Andrea R.
Ceperley, Daniel P.
Sinsermsuksakul, Prasert
Neureuther, Andrew R.
Yang, Peidong
TI Self-Organized Silver Nanoparticles for Three-Dimensional Plasmonic
Crystals
SO NANO LETTERS
LA English
DT Article
ID ENHANCED RAMAN-SCATTERING; PHOTONIC CRYSTAL; OPTICAL WAVELENGTHS;
WAVE-GUIDES; ARRAYS; LIGHT; METAMATERIALS; NANOCRYSTALS; BANDGAP;
SPHERES
AB Metal nanostructures that Support surface plasmons are compelling as plasmonic circuit elements and as the building blocks for metamaterials. We demonstrate here the spontaneous self-assembly of shaped silver nanoparticles into three-dimensional plasmonic crystals that display a frequency-selective response in the visible wavelengths. Extensive long-range order mediated by exceptional colloid monodispersity gives rise to optical passbands that can be tuned by particle volume fraction. These metallic supercrystals present a new paradigm for the fabrication of plasmonic materials, delivering a functional, tunable, completely bottom-up optical element that can be constructed on a massively parallel scale without lithography.
C1 [Tao, Andrea R.; Sinsermsuksakul, Prasert; Yang, Peidong] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Tao, Andrea R.; Sinsermsuksakul, Prasert; Yang, Peidong] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Ceperley, Daniel P.; Neureuther, Andrew R.] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA.
RP Yang, PD (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM p_yang@berkeley.edu
FU National Science Foundation and the U.S. Department of Energy
[DE-AC02-05CHI1231]
FX This work is partially supported by National Science Foundation and the
U.S. Department of Energy under Contract No. DE-AC02-05CHI1231.
NR 30
TC 118
Z9 118
U1 6
U2 103
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD NOV
PY 2008
VL 8
IS 11
BP 4033
EP 4038
DI 10.1021/nl802877h
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 372FX
UT WOS:000260888600085
PM 18928325
ER
PT J
AU Kohout, SC
Isacoff, EY
AF Kohout, Susy C.
Isacoff, Ehud Y.
TI To dislodge an enzyme from an ion channel, try steroids
SO NATURE CHEMICAL BIOLOGY
LA English
DT News Item
ID K+ CHANNEL; BETA-SUBUNIT; POTASSIUM CHANNELS; INACTIVATION; EXPRESSION
AB Voltage-gated K+ channels assemble into complexes with Kv beta s, a group of aldoketoreductases. The Kv beta s regulate channel gating and localization, and voltage-dependent changes in the channel regulate AKR activity. Pan and colleagues now propose a new type of modulation of this complex. Cortisone disrupts the complex and relieves channel inactivation-which should reduce neuronal excitability.
C1 [Kohout, Susy C.] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
Lawrence Berkeley Lab, Div Mat, Berkeley, CA 94720 USA.
Lawrence Berkeley Lab, Div Phys Biosci, Berkeley, CA 94720 USA.
RP Kohout, SC (reprint author), Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
EM ehud@berkeley.edu
FU NINDS NIH HHS [R01 NS035549]
NR 13
TC 1
Z9 1
U1 0
U2 1
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK STREET, 9TH FLOOR, NEW YORK, NY 10013-1917 USA
SN 1552-4450
J9 NAT CHEM BIOL
JI Nat. Chem. Biol.
PD NOV
PY 2008
VL 4
IS 11
BP 650
EP 651
DI 10.1038/nchembio1108-650
PG 2
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 364CY
UT WOS:000260315000006
PM 18936745
ER
PT J
AU Rahimov, F
Marazita, ML
Visel, A
Cooper, ME
Hitchler, MJ
Rubini, M
Domann, FE
Govil, M
Christensen, K
Bille, C
Melbye, M
Jugessur, A
Lie, RT
Wilcox, AJ
Fitzpatrick, DR
Green, ED
Mossey, PA
Little, J
Steegers-Theunissen, RP
Pennacchio, LA
Schutte, BC
Murray, JC
AF Rahimov, Fedik
Marazita, Mary L.
Visel, Axel
Cooper, Margaret E.
Hitchler, Michael J.
Rubini, Michele
Domann, Frederick E.
Govil, Manika
Christensen, Kaare
Bille, Camille
Melbye, Mads
Jugessur, Astanand
Lie, Rolv T.
Wilcox, Allen J.
Fitzpatrick, David R.
Green, Eric D.
Mossey, Peter A.
Little, Julian
Steegers-Theunissen, Regine P.
Pennacchio, Len A.
Schutte, Brian C.
Murray, Jeffrey C.
CA NISC Comparative Sequencing Pr
TI Disruption of an AP-2 alpha binding site in an IRF6 enhancer is
associated with cleft lip
SO NATURE GENETICS
LA English
DT Article
ID OROFACIAL CLEFTS; ORAL CLEFTS; PALATE; GENE; POPULATION; SEQUENCES;
POLYMORPHISMS; CONTRIBUTES; EXPRESSION; MUTATIONS
AB Previously we have shown that nonsyndromic cleft lip with or without cleft palate (NSCL/P)(1) is strongly associated with SNPs in IRF6 (interferon regulatory factor 6)(2). Here, we use multispecies sequence comparisons to identify a common SNP (rs642961, G>A) in a newly identified IRF6 enhancer. The A allele is significantly overtransmitted (P = 1 x 10(-11)) in families with NSCL/P, in particular those with cleft lip but not cleft palate. Further, there is a dosage effect of the A allele, with a relative risk for cleft lip of 1.68 for the AG genotype and 2.40 for the AA genotype. EMSA and ChIP assays demonstrate that the risk allele disrupts the binding site of transcription factor AP-2a and expression analysis in the mouse localizes the enhancer activity to craniofacial and limb structures. Our findings place IRF6 and AP-2a in the same developmental pathway and identify a high-frequency variant in a regulatory element contributing substantially to a common, complex disorder.
C1 [Rahimov, Fedik; Schutte, Brian C.; Murray, Jeffrey C.] Univ Iowa, Dept Pediat, Iowa City, IA 52242 USA.
[Marazita, Mary L.; Cooper, Margaret E.; Govil, Manika] Univ Pittsburgh, Sch Dent Med, Dept Oral Biol, Ctr Craniofacial & Dent Genet, Pittsburgh, PA 15219 USA.
[Visel, Axel; Pennacchio, Len A.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Genome Div, Berkeley, CA 94720 USA.
[Hitchler, Michael J.; Domann, Frederick E.] Univ Iowa, Dept Radiat Oncol, Iowa City, IA 52242 USA.
[Rubini, Michele] Univ Ferrara, Med Genet Unit, Dept Expt Diagnost Med, I-44100 Ferrara, Italy.
[Christensen, Kaare; Bille, Camille] Univ So Denmark, Inst Publ Hlth, Ctr Prevent Congenital Malinformat, DK-5000 Odense C, Denmark.
[Melbye, Mads] Danish Epidemiol Sci Ctr, State Serum Inst, Dept Epidemiol Res, DK-2300 Copenhagen, Denmark.
[Jugessur, Astanand; Lie, Rolv T.] Univ Bergen, Dept Publ Hlth & Primary Hlth Care, Sect Epidemiol & Med Stat, N-5018 Bergen, Norway.
[Wilcox, Allen J.] NIEHS, Epidemiol Branch, NIH, Res Triangle Pk, NC 27709 USA.
[Fitzpatrick, David R.] Western Gen Hosp, Med Res Council Human Genet Unit, Edinburgh EH4 2XU, Midlothian, Scotland.
[Green, Eric D.; NISC Comparative Sequencing Pr] NHGRI, Genome Technol Branch, NIH, Bethesda, MD 20892 USA.
[Green, Eric D.; NISC Comparative Sequencing Pr] NHGRI, US Natl Inst Hlth Intramural Sequencing Ctr, NIH, Bethesda, MD 20892 USA.
[Mossey, Peter A.] Univ Dundee, Dent Hosp & Sch, Dundee DD1 4HR, Scotland.
[Little, Julian] Univ Ottawa, Dept Epidemiol & Community Med, Ottawa, ON K1H 8M5, Canada.
[Steegers-Theunissen, Regine P.] Univ Med Ctr, NL-3015 GD Rotterdam, Netherlands.
RP Murray, JC (reprint author), Univ Iowa, Dept Pediat, 2182 ML,S Grand Ave, Iowa City, IA 52242 USA.
EM jeff-murray@uiowa.edu
RI Visel, Axel/A-9398-2009; Christensen, Kaare/C-2360-2009; FitzPatrick,
David/C-7301-2013; Rahimov, Fedik/H-2685-2013;
OI Visel, Axel/0000-0002-4130-7784; Christensen, Kaare/0000-0002-5429-5292;
Mossey, Peter/0000-0002-9914-6901; Wilcox, Allen/0000-0002-3376-1311
FU National Institutes of Health (NIH) [P50 DE16215, P30 ES05605, R37
DE08559, R01-DE13513, 1 UL1 RR024979-01, R01-CA73612, R01-HG003988];
Intramural Research Program of the National Human Genome Research
Institute; Intramural Research Program of the NIH; National Institute of
Environmental Health Sciences; European Commission FP5; EUROCRAN
[QLG1-CT-2000-01019]; American Heart Association; [DE-AC02-05CH11231];
[T32 CA078586]
FX We would like to thank A. Kinoshita, K. Frees, A. Mansilla, J.
L'Heureux, M. Johnson, H. Morrison, G. Wehby, N. Rorick, K. Bedell and
L. Powers for technical assistance and S. McConnell, D. Benton and M.
DeVore for their administrative assistance. We would also like to thank
A. Klingelhutz (University of Iowa) for kindly providing us with HFK
cell line. This work was supported by grants from the National
Institutes of Health (NIH): P50 DE16215 (J.C.M., M.L.M., B.C.S.), P30
ES05605 (J.C.M.), R37 DE08559 (J.C.M., M.L.M.), R01-DE13513 (B.C.S.), 1
UL1 RR024979-01 (J.C.M., B.C.S.), R01-CA73612 (F.E.D.), R01-HG003988
administered under Department of Energy Contract DE-AC02-05CH11231
(L.A.P.) as well as by the Intramural Research Program of the National
Human Genome Research Institute (E.D.G.), in part by the Intramural
Research Program of the NIH, National Institute of Environmental Health
Sciences (A.J.W.), and European Commission FP5: EUROCRAN Project
(contract no. QLG1-CT-2000-01019) (M.R., P.A.M., J.L., R.P.S.-T.). A.V.
was supported by the American Heart Association. M.J.H. received salary
support from T32 CA078586.
NR 30
TC 222
Z9 235
U1 2
U2 18
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK STREET, 9TH FLOOR, NEW YORK, NY 10013-1917 USA
SN 1061-4036
J9 NAT GENET
JI Nature Genet.
PD NOV
PY 2008
VL 40
IS 11
BP 1341
EP 1347
DI 10.1038/ng.242
PG 7
WC Genetics & Heredity
SC Genetics & Heredity
GA 366RQ
UT WOS:000260501500028
PM 18836445
ER
PT J
AU Gillett, NP
Stone, DA
Stott, PA
Nozawa, T
Karpechko, AY
Hegerl, GC
Wehner, MF
Jones, PD
AF Gillett, Nathan P.
Stone, Daithi A.
Stott, Peter A.
Nozawa, Toru
Karpechko, Alexey Yu.
Hegerl, Gabriele C.
Wehner, Michael F.
Jones, Philip D.
TI Attribution of polar warming to human influence
SO NATURE GEOSCIENCE
LA English
DT Article
ID SURFACE AIR-TEMPERATURE; CLIMATE-CHANGE; ANTARCTIC TEMPERATURES; ANNULAR
MODE; VARIABILITY; 20TH-CENTURY; TRENDS
AB The polar regions have long been expected to warm strongly as a result of anthropogenic climate change, because of the positive feedbacks associated with melting ice and snow(1,2). Several studies have noted a rise in Arctic temperatures over recent decades(2-4), but have not formally attributed the changes to human influence, owing to sparse observations and large natural variability(5,6). Both warming and cooling trends have been observed in Antarctica(7), which the Intergovernmental Panel on Climate Change Fourth Assessment Report concludes is the only continent where anthropogenic temperature changes have not been detected so far, possibly as a result of insufficient observational coverage(8). Here we use an up-to-date gridded data set of land surface temperatures(9,10) and simulations from four coupled climate models to assess the causes of the observed polar temperature changes. We find that the observed changes in Arctic and Antarctic temperatures are not consistent with internal climate variability or natural climate drivers alone, and are directly attributable to human influence. Our results demonstrate that human activities have already caused significant warming in both polar regions, with likely impacts on polar biology, indigenous communities(2), ice-sheet mass balance and global sea level(11).
C1 [Gillett, Nathan P.; Karpechko, Alexey Yu.; Jones, Philip D.] Univ E Anglia, Sch Environm Sci, Climat Res Unit, Norwich NR4 7TJ, Norfolk, England.
[Stone, Daithi A.] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England.
[Stone, Daithi A.] Univ Oxford, Environm Change Inst, Tyndall Ctr Climate Change Res, Oxford OX1 3QY, England.
[Stott, Peter A.] Met Off Hadley Ctr, Exeter EX1 3PB, Devon, England.
[Nozawa, Toru] Natl Inst Environm Studies, Tsukuba, Ibaraki 3058506, Japan.
[Hegerl, Gabriele C.] Univ Edinburgh, Sch Geosci, Grant Inst, Edinburgh EH9 3JW, Midlothian, Scotland.
[Wehner, Michael F.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Gillett, NP (reprint author), Univ E Anglia, Sch Environm Sci, Climat Res Unit, Norwich NR4 7TJ, Norfolk, England.
EM n.gillett@uea.ac.uk
RI Jones, Philip/C-8718-2009; Stott, Peter/N-1228-2016;
OI Jones, Philip/0000-0001-5032-5493; Stott, Peter/0000-0003-4853-7686;
Stone, Daithi/0000-0002-2518-100X
FU Climate Change Detection and Attribution Project; NOAA's Office of
Global Programs; US Department of Energy; NERC [NE/E006787/1];
Leverhulme Trust; Joint Defra; MoD Programme, (Defra) [GA01101,
CBC/2B/0417]
FX We thank S. Solomon, G. Marshall and H. Melling for useful advice and
discussion; M. Allen for his optimal detection and attribution code; and
G. Jones for assistance with the provision of model output. This work
was supported in part by the Climate Change Detection and Attribution
Project, jointly funded by NOAA's Office of Global Programs and the US
Department of Energy. N. P. G. and A. Y. K. were also supported by NERC
grant NE/E006787/1, and N. P. G. acknowledges support from the
Leverhulme Trust. P. A. S. was supported by the Joint Defra and MoD
Programme, (Defra) GA01101 (MoD) CBC/2B/0417 Annex C5.
NR 30
TC 89
Z9 98
U1 4
U2 47
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 1752-0894
EI 1752-0908
J9 NAT GEOSCI
JI Nat. Geosci.
PD NOV
PY 2008
VL 1
IS 11
BP 750
EP 754
DI 10.1038/ngeo338
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 374DU
UT WOS:000261023700012
ER
PT J
AU Fan, ZY
Javey, A
AF Fan, Zhiyong
Javey, Ali
TI PHOTOVOLTAICS Solar cells on curtains
SO NATURE MATERIALS
LA English
DT News Item
ID NANOWIRE ARRAYS; SCALE
C1 [Fan, Zhiyong] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Fan, ZY (reprint author), Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA.
EM ajavey@eecs.berkeley.edu
RI Fan, Zhiyong/C-4970-2012; Javey, Ali/B-4818-2013;
OI Fan, Zhiyong/0000-0002-5397-0129
NR 7
TC 24
Z9 25
U1 0
U2 19
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1476-1122
J9 NAT MATER
JI Nat. Mater.
PD NOV
PY 2008
VL 7
IS 11
BP 835
EP 836
DI 10.1038/nmat2312
PG 2
WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 366IA
UT WOS:000260472800008
PM 18955992
ER
PT J
AU Zaug, JM
Soper, AK
Clark, SM
AF Zaug, Joseph M.
Soper, Alan K.
Clark, Simon M.
TI Pressure-dependent structures of amorphous red phosphorus and the origin
of the first sharp diffraction peaks
SO NATURE MATERIALS
LA English
DT Article
ID INFRARED-ABSORPTION; RAMAN-SCATTERING; RANGE ORDER; RECOMBINATION;
DYNAMICS; CLUSTERS; SPECTRA; LIQUIDS; SOLIDS; MODELS
AB Characterizing the nature of medium-range order (MRO) in liquids and disordered solids is important for understanding their structure and transport properties. However, accurately portraying MRO, as manifested by the first sharp diffraction peak (FSDP) in neutron and X-ray scattering measurements, has remained elusive for more than 80 years. Here, using X-ray diffraction of amorphous red phosphorus compressed to 6.30 GPa, supplemented with micro-Raman scattering studies, we build three-dimensional structural models consistent with the diffraction data. We discover that the pressure dependence of the FSDP intensity and line position can be quantitatively accounted for by a characteristic void distribution function, defined in terms of average void size, void spacing and void density. This work provides a template to unambiguously interpret atomic and void-space MRO across a broad range of technologically promising network-forming materials.
C1 [Zaug, Joseph M.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Soper, Alan K.] STFC Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
[Clark, Simon M.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA USA.
[Clark, Simon M.] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
RP Zaug, JM (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave,L-350, Livermore, CA 94551 USA.
EM zaug1@llnl.gov
RI Clark, Simon/B-2041-2013
OI Clark, Simon/0000-0002-7488-3438
FU Lawrence Livermore National Laboratory [DE-AC52-07NA27344]; US
Department of Energy [E-AC03-76SF00098]
FX J.M.Z. thanks J. Molitoris for sparking an interest to study a-rP, M.
Bastea for providing a-rP sample material and C. Thompson of
www.mathengineering.com for Matlab consulting and code acceleration
tips. We thank J. Eggert for his guidance to properly determine density
from high-pressure diffraction data. This work was carried out under the
auspices of the US Department of Energy jointly by Lawrence Livermore
National Laboratory under Contract DE-AC52-07NA27344. The Advanced Light
Source is supported by the Director, Office of Science, Office of Basic
Energy Sciences, of the US Department of Energy under Contract
DE-AC03-76SF00098.
NR 48
TC 39
Z9 39
U1 4
U2 37
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1476-1122
J9 NAT MATER
JI Nat. Mater.
PD NOV
PY 2008
VL 7
IS 11
BP 890
EP 899
DI 10.1038/nmat2290
PG 10
WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 366IA
UT WOS:000260472800023
PM 18849976
ER
PT J
AU Toor, N
Rajashankar, K
Keating, KS
Pyle, AM
AF Toor, Navtej
Rajashankar, Kanagalaghatta
Keating, Kevin S.
Pyle, Anna Marie
TI Structural basis for exon recognition by a group II intron
SO NATURE STRUCTURAL & MOLECULAR BIOLOGY
LA English
DT Article
AB Free group II introns are infectious retroelements that can bind and insert themselves into RNA and DNA molecules via reverse splicing. Here we report the 3.4-angstrom crystal structure of a complex between an oligonucleotide target substrate and a group IIC intron, as well as the refined free intron structure. The structure of the complex reveals the conformation of motifs involved in exon recognition by group II introns.
C1 [Toor, Navtej; Pyle, Anna Marie] Yale Univ, Dept Mol Biophys & Biochem, New Haven, CT 06520 USA.
[Toor, Navtej; Pyle, Anna Marie] Yale Univ, Howard Hughes Med Inst, New Haven, CT 06520 USA.
[Rajashankar, Kanagalaghatta] Argonne Natl Lab, NE CAT Adv Photon Source, Argonne, IL 60439 USA.
[Keating, Kevin S.] Yale Univ, Program Computat Biol & Bioinformat, New Haven, CT 06511 USA.
RP Rajashankar, K (reprint author), Yale Univ, Dept Mol Biophys & Biochem, 266 Whitney Ave, New Haven, CT 06520 USA.
EM rajashankar@anl.gov; anna.pyle@yale.edu
OI Keating, Kevin/0000-0001-5855-6739
FU Howard Hughes Medical Institute (HHMI); US National Institutes of Health
[GM50313]; HHMI
FX We thank the staff of the NE-CAT beamline 24-ID-C at the Advanced Photon
Source of Argonne National Laboratory. We also thank O. Fedorova for
advice and support. This work was supported by the Howard Hughes Medical
Institute (HHMI) and US National Institutes of Health grant GM50313 (A.
M. P.). N.T. and A.M.P. are funded by the HHMI.
NR 8
TC 58
Z9 58
U1 0
U2 3
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK STREET, 9TH FLOOR, NEW YORK, NY 10013-1917 USA
SN 1545-9985
J9 NAT STRUCT MOL BIOL
JI Nat. Struct. Mol. Biol.
PD NOV
PY 2008
VL 15
IS 11
BP 1221
EP 1222
DI 10.1038/nsmb.1509
PG 2
WC Biochemistry & Molecular Biology; Biophysics; Cell Biology
SC Biochemistry & Molecular Biology; Biophysics; Cell Biology
GA 368QV
UT WOS:000260638500021
PM 18953333
ER
PT J
AU Kaatz, FH
Bultheel, A
Egami, T
AF Kaatz, Forrest H.
Bultheel, Adhemar
Egami, Takeshi
TI Order parameters from image analysis: a honeycomb example
SO NATURWISSENSCHAFTEN
LA English
DT Article
DE image analysis; bee honeycomb; radial distribution function; pair
distribution function; Debye-Waller factor; order parameters
ID MATHEMATICAL-MODEL; CONSTRUCTION; BEES; PATTERN; COMBS
AB Honeybee combs have aroused interest in the ability of honeybees to form regular hexagonal geometric constructs since ancient times. Here we use a real space technique based on the pair distribution function (PDF) and radial distribution function (RDF), and a reciprocal space method utilizing the Debye-Waller Factor (DWF) to quantify the order for a range of honeycombs made by Apis mellifera ligustica. The PDFs and RDFs are fit with a series of Gaussian curves. We characterize the order in the honeycomb using a real space order parameter, OP(3) , to describe the order in the combs and a two-dimensional Fourier transform from which a Debye-Waller order parameter, u, is derived. Both OP(3) and u take values from [0, 1] where the value one represents perfect order. The analyzed combs have values of OP(3) from 0.33 to 0.60 and values of u from 0.59 to 0.69. RDF fits of honeycomb histograms show that naturally made comb can be crystalline in a 2D ordered structural sense, yet is more 'liquid-like' than cells made on 'foundation' wax. We show that with the assistance of man-made foundation wax, honeybees can manufacture highly ordered arrays of hexagonal cells. This is the first description of honeycomb utilizing the Debye-Waller Factor, and provides a complete analysis of the order in comb from a real-space order parameter and a reciprocal space order parameter. It is noted that the techniques used are general in nature and could be applied to any digital photograph of an ordered array.
C1 [Kaatz, Forrest H.] Owens Community Coll, Dept Math & Life Nat Sci, Toledo, OH 43699 USA.
[Bultheel, Adhemar] Katholieke Univ Leuven, Dept Comp Sci, B-3001 Heverlee, Belgium.
[Egami, Takeshi] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Egami, Takeshi] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Egami, Takeshi] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Kaatz, FH (reprint author), Owens Community Coll, Dept Math & Life Nat Sci, Toledo, OH 43699 USA.
EM fhkaatz@yahoo.com
RI Bultheel, Adhemar/A-2785-2016
OI Bultheel, Adhemar/0000-0001-9562-5297
NR 23
TC 7
Z9 7
U1 0
U2 10
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0028-1042
J9 NATURWISSENSCHAFTEN
JI Naturwissenschaften
PD NOV
PY 2008
VL 95
IS 11
BP 1033
EP 1040
DI 10.1007/s00114-008-0418-4
PG 8
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 359OM
UT WOS:000259997400003
PM 18633584
ER
PT J
AU Abriola, D
Sonzogni, AA
AF Abriola, D.
Sonzogni, A. A.
TI Nuclear Data Sheets for A=96
SO NUCLEAR DATA SHEETS
LA English
DT Review
ID DELAYED-NEUTRON EMISSION; DOUBLE-BETA-DECAY; LOW-LYING STATES; HIGH-SPIN
STATES; INELASTIC DEUTERON SCATTERING; ISOBARIC ANALOG RESONANCES; MASS
MOLYBDENUM ISOTOPES; DOUBLE SUBSHELL CLOSURE; GAMMA-RAY SPECTROSCOPY;
SHORT-LIVED RB
AB Experimental data on ground- and excited-state properties for all known nuclei with mass number A=96 have been compiled and evaluated. States populated in radioactive decay, as well as in nuclear reactions, have been considered. For these nuclei, level and decay schemes, as well as tables of nuclear properties, are presented. This work supersedes the 1993 evaluation by L.K. Peker (1993Pe02). In summary, three isomers were identified in Ag-96 (2003Ba39,1997Gr02), even though the relative energies were not established, In Ru-96 a nuclear fluorescence experiment (2005Li59) determined the spin, branching ratios and transition strengths of dipole excitations; high-spin level properties were reported by 2000Kh02 and 2002K107. High spin levels in Tc-96 were studied in 2001Bu19. For (MO)-M-96, there are new high-spin data (2000Ch42), as well as low-spin levels produced in (n,n'gamma) (2007Le05) and (gamma,gamma') (2004Fr30). High spin data (2005Pa48) were obtained for Zr-96 using heavy-ion induced fission. For Sr-96, new levels were deduced using alpha-induced (2005Pa48) and spontaneous fission. The decay of a (10-) isomer in Rb-96 was studied by 2005Pi13. Several new mass measurements for neutron rich nuclides have been published, which were used to obtain Q-values and separation energies.
C1 [Abriola, D.; Sonzogni, A. A.] Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
[Abriola, D.] IAEA, Div Phys & Chem Sci, Dept Nucl Sci & Applicat, Nucl Data Sect, A-1400 Vienna, Austria.
RP Abriola, D (reprint author), Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
NR 238
TC 39
Z9 39
U1 0
U2 4
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD NOV
PY 2008
VL 109
IS 11
BP 2501
EP +
DI 10.1016/j.nds.2008.10.002
PG 154
WC Physics, Nuclear
SC Physics
GA 372VW
UT WOS:000260931100001
ER
PT J
AU Browne, E
Tuli, JK
AF Browne, E.
Tuli, J. K.
TI Nuclear Data Sheets for A=229
SO NUCLEAR DATA SHEETS
LA English
DT Review
ID ODD ELECTROMAGNETIC MOMENTS; SHORT-LIVED ISOTOPES; ALPHA-DECAY;
HYPERFINE-STRUCTURE; PARITY-NONCONSERVATION; RADIUM ISOTOPES;
GROUND-STATE; QUADRUPOLE-MOMENTS; EXCITED-STATE; ANGULAR-DISTRIBUTIONS
AB The evaluators present in this publication spectroscopic data and level schemes from radioactive decay and nuclear reaction studies for all nuclei with mass number A=229. These nuclei belong to a region of coexisting quadrupole with possible octupole deformations. The latter have been observed in Ra-229, but in Pa-229 the experimental evidence is inconclusive.
The present evaluation of A=229, which includes all data received by June 2008, supersedes the 1989 evaluation by Y. A. Akovali, published in Nuclear Data Sheets 58, 555 (1989).
Highlights of this publication are given below:
A comprehensive spectroscopic study of Fr-229(50.2 a) beta- decay using mass-separated sources have provided the first evidence of parity doublets in Ra-229 due to nuclear octupole deformation (1999Fr33).
In Th-229 a level at 7.6 5 eV --the closest level to the ground state ever known -- has been confirmed through extremely precise measurements of gamma-ray energies from U-233 alpha decay (1994He08, 2007Be16). A nuclear level at such low energy may be used for studying a large variety of atomic properties associated to nuclear decay.
The level structure in Pa-229 has been interpreted in terms of the rotational model (1994Le22). Some authors, however, have proposed the existence of parity doublets as evidence of octupole nuclear deformation (1982Ah08). This interpretation has not been confirmed.
C1 [Browne, E.] Brookhaven Natl Lab, Natl Nucl Data Ctr, Lawrence Berkeley Lab, Upton, NY 11973 USA.
RP Browne, E (reprint author), Brookhaven Natl Lab, Natl Nucl Data Ctr, Lawrence Berkeley Lab, Upton, NY 11973 USA.
NR 161
TC 11
Z9 11
U1 0
U2 6
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD NOV
PY 2008
VL 109
IS 11
BP 2657
EP +
DI 10.1016/j.nds.2008.10.001
PG 67
WC Physics, Nuclear
SC Physics
GA 372VW
UT WOS:000260931100002
ER
PT J
AU Ball, S
Richards, M
Shepelev, S
AF Ball, Syd
Richards, Matt
Shepelev, Sergey
TI Sensitivity studies of air ingress accidents in modular HTGRs
SO NUCLEAR ENGINEERING AND DESIGN
LA English
DT Article; Proceedings Paper
CT 3rd International Conference on High Reactor Technology
CY OCT 01-04, 2006
CL Gauteng, SOUTH AFRICA
ID PIPE RUPTURE ACCIDENT; GAS-COOLED REACTOR
AB Postulated air ingress accidents, while of very low probability in a modular high-temperature gas-cooled reactor (HTGR), are of considerable interest to the plant designer, operator, and regulator because of the possibility that the core could sustain significant damage under some circumstances. Sensitivity analyses are described that cover a wide spectrum of conditions affecting outcomes of the postulated accident sequences, for both prismatic and pebble-bed core designs. The major factors affecting potential core damage are the size and location of primary system leaks, flow path resistances, the core temperature distribution, and the long-term availability of oxygen in the incoming gas from a confinement building. Typically, all the incoming oxygen entering the core area is consumed within the reactor vessel, so it is more a matter of where, not whether, oxidation occurs. An air ingress model with example scenarios and means for mitigating damage are described. Representative designs of modular HTGRs included here are a 400-MW(th) pebble-bed reactor (PBR), and a 600-MW(th) prismatic-core modular reactor (PMR) design such as the gas-turbine modular helium reactor (GT-MHR).
C1 [Ball, Syd; Richards, Matt; Shepelev, Sergey] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
Gen Atomics, San Diego, CA USA.
OKBM, Novgorod, Russia.
RP Ball, S (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM sjb@ornl.gov
NR 16
TC 5
Z9 5
U1 0
U2 1
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0029-5493
J9 NUCL ENG DES
JI Nucl. Eng. Des.
PD NOV
PY 2008
VL 238
IS 11
BP 2935
EP 2942
DI 10.1016/j.nucengdes.2008.02.021
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 378KT
UT WOS:000261320300014
ER
PT J
AU Hollmann, EM
Jernigan, TC
Parks, PB
Boedo, JA
Evans, TE
Groth, M
Humphreys, DA
James, AN
Lanctot, MJ
Nishijima, D
Rudakov, DL
Scott, HA
Strait, EJ
Van Zeeland, MA
Wesley, JC
West, WP
Wu, W
Yu, JH
AF Hollmann, E. M.
Jernigan, T. C.
Parks, P. B.
Boedo, J. A.
Evans, T. E.
Groth, M.
Humphreys, D. A.
James, A. N.
Lanctot, M. J.
Nishijima, D.
Rudakov, D. L.
Scott, H. A.
Strait, E. J.
Van Zeeland, M. A.
Wesley, J. C.
West, W. P.
Wu, W.
Yu, J. H.
TI Measurements of injected impurity assimilation during massive gas
injection experiments in DIII-D
SO NUCLEAR FUSION
LA English
DT Article
ID JET DISRUPTION MITIGATION; FAST PLASMA SHUTDOWN; ALCATOR C-MOD; TOKAMAK;
VALVE
AB Impurities (H(2), D(2), He, Ne or Ar) injected into steady (non-disrupting) discharges with massive gas injection (MGI) are shown to mix into the plasma core dominantly via magnetohydrodynamic activity during the plasma thermal quench (TQ). Mixing efficiencies of injected impurities into the plasma core are measured to be of order 0.05-0.4. 0D modelling of the experiments is found to reproduce observed TQ and current quench durations reasonably well (typically within +/- 25% or so), although shutdown onset times are underestimated (by around 2 x). Preliminary 0D modelling of ITER based on DIII-D mixing efficiencies suggests that MGI will work well in ITER with regard to disruption heat load and vessel force mitigation, but may not collisionally suppress runaway electrons.
C1 [Hollmann, E. M.; Boedo, J. A.; James, A. N.; Nishijima, D.; Rudakov, D. L.; Yu, J. H.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[Jernigan, T. C.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Parks, P. B.; Evans, T. E.; Humphreys, D. A.; Strait, E. J.; Van Zeeland, M. A.; Wesley, J. C.; West, W. P.; Wu, W.] Gen Atom Co, San Diego, CA 92186 USA.
[Groth, M.; Scott, H. A.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Lanctot, M. J.] Columbia Univ, New York, NY 10027 USA.
RP Hollmann, EM (reprint author), Univ Calif San Diego, La Jolla, CA 92093 USA.
RI Groth, Mathias/G-2227-2013; Lanctot, Matthew J/O-4979-2016
OI Lanctot, Matthew J/0000-0002-7396-3372
FU US Department of Energy [DE-FG02-07ER54917, DE-AC05-00OR22725,
DE-FG03-95ER54294, DE-FC02-04ER54698, DE-AC52-07NA27344,
DE-FG02-89ER53297]
FX This work was supported by the US Department of Energy under
DE-FG02-07ER54917, DE-AC05-00OR22725, DE-FG03-95ER54294,
DE-FC02-04ER54698, DE-AC52-07NA27344 and DE-FG02-89ER53297. Useful
advice from Drs D.G. Whyte (MIT), M. Bakhtiari (FIT) and N. Ohno (Nagoya
University) is acknowledged, as is the experimental assistance of the
DIII-D Team. Permission from Dr A. Pigarov (UCSD) to use the BELINE code
for Stark line-shape calculations is gratefully acknowledged. The
originating developer of ADAS is the JET Joint Undertaking.
NR 26
TC 44
Z9 44
U1 0
U2 6
PU INT ATOMIC ENERGY AGENCY
PI VIENNA
PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA
SN 0029-5515
J9 NUCL FUSION
JI Nucl. Fusion
PD NOV
PY 2008
VL 48
IS 11
AR 115007
DI 10.1088/0029-5515/48/11/115007
PG 12
WC Physics, Fluids & Plasmas
SC Physics
GA 367QE
UT WOS:000260566400007
ER
PT J
AU Xu, YC
Dong, X
Zhang, ZP
Tang, ZB
Shao, M
AF Xu, Yichun
Dong, Xin
Zhang, Ziping
Tang, Zebo
Shao, Ming
TI Improvement of resonance reconstruction with time-of-flight detector at
STAR experiment
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE TPC; TOF; PID; Reconstruction
AB With the upgrade of the barrel Time-Of-Flight (TOF) detector, based on Multi-gap Resistive Plate Chamber technology, the particle identification capability of the STAR experiment will be improved greatly. In order to further understand the performance of TOF more practically, vector meson phi(1020) and K*(892) are reconstructed from their two-charged-particle decay mode using the data generated from Au + Au collisions at root S(NN) = 200 GeV. With the TOF to identify one of the two charged-daughter particles, the resonance significance could be increased by 2-4 times, compared to the identification of two charged-daughter particles using the Time Projection Chamber (TPC) only. This promising performance on resonance reconstruction from the TOF will enhance the measurements of short lived particles at RHIC. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Xu, Yichun; Dong, Xin; Zhang, Ziping; Tang, Zebo; Shao, Ming] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhu, Peoples R China.
[Dong, Xin] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Xu, YC (reprint author), Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhu, Peoples R China.
EM xuyichun@mail.ustc.edu.cn
RI Tang, Zebo/A-9939-2014; Dong, Xin/G-1799-2014
OI Tang, Zebo/0000-0002-4247-0081; Dong, Xin/0000-0001-9083-5906
NR 9
TC 0
Z9 1
U1 0
U2 3
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 NOV 1
PY 2008
VL 596
IS 2
BP 186
EP 189
DI 10.1016/j.nima.2008.07.147
PG 4
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 377ZS
UT WOS:000261291500005
ER
PT J
AU Michael, DG
Adamson, P
Alexopoulos, T
Allison, WWM
Alner, GJ
Anderson, K
Andreopoulos, C
Andrews, M
Andrews, R
Arroyo, C
Avvakumov, S
Ayres, DS
Baller, B
Barish, B
Barker, MA
Barnes, PD
Barr, G
Barrett, WL
Beall, E
Bechtol, K
Becker, BR
Belias, A
Bergfeld, T
Bernstein, RH
Bhattacharya, D
Bishai, M
Blake, A
Bocean, V
Bock, B
Bock, GJ
Boehm, J
Boehnlein, DJ
Bogert, D
Border, PM
Bower, C
Boyd, S
Buckley-Geer, E
Byon-Wagner, A
Cabrera, A
Chapman, JD
Chase, TR
Chernichenko, SK
Childress, S
Choudhary, BC
Cobb, JH
Coleman, SJ
Cossairt, JD
Courant, H
Crane, DA
Culling, AJ
Damiani, D
Dawson, JW
de Jong, JK
DeMuth, DM
De Santo, A
Dierckxsens, M
Diwan, MV
Dorman, M
Drake, G
Ducar, R
Durkin, T
Erwin, AR
Escobar, CO
Evans, JJ
Fackler, OD
Harris, EF
Feldman, GJ
Felt, N
Fields, TH
Ford, R
Frohne, MV
Gallagher, HR
Gebhard, M
Godley, A
Gogos, J
Goodman, MC
Gornushkin, Y
Gouffon, P
Grashorn, EW
Grossman, N
Grudzinski, JJ
Grzelak, K
Guarino, V
Habig, A
Halsall, R
Hanson, J
Harris, D
Harris, PG
Hartnell, J
Hartouni, EP
Hatcher, R
Heller, K
Hill, N
Ho, Y
Howcroft, C
Hylen, J
Ignatenko, M
Indurthy, D
Irwin, GM
James, C
Jenner, L
Jensen, D
Joffe-Minor, T
Kafka, T
Kang, HJ
Kasahara, SMS
Kilmer, J
Kim, H
Kim, MS
Koizumi, G
Kopp, S
Kordosky, M
Koskinen, DJ
Kostin, M
Kotelnikov, SK
Krakauer, DA
Kumaratunga, S
Ladran, AS
Lang, K
Laughton, C
Lebedev, A
Lee, R
Lee, WY
Libkind, MA
Liu, J
Litchfield, PJ
Litchfield, RP
Longley, NP
Lucas, P
Luebke, W
Madani, S
Maher, E
Makeev, V
Mann, WA
Marchionni, A
Marino, AD
Marshak, ML
Marshall, JS
McDonald, J
McGowan, AM
Meier, JR
Merzon, GI
Messier, MD
Milburn, RH
Miller, JL
Miller, WH
Mishra, SR
Miyagawa, PS
Moore, CD
Morfin, J
Morse, R
Mualem, L
Mufson, S
Murgia, S
Murtagh, MJ
Musser, J
Naples, D
Nelson, C
Nelson, JK
Newman, HB
Nezrick, F
Nichol, RJ
Nicholls, TC
Ochoa-Ricoux, JP
Oliver, J
Oliver, WP
Onuchino, VA
Osiecki, T
Ospanov, R
Paley, J
Paolone, V
Para, A
Patzak, T
Pavlovic, Z
Pearce, GF
Pearson, N
Peck, CW
Perry, C
Peterson, EA
Petyt, DA
Ping, H
Piteira, R
Pla-Dalmau, A
Plunkett, RK
Price, LE
Proga, M
Pushka, DR
Rahman, D
Rameika, RA
Raufer, TM
Read, AL
Rebel, B
Reyna, DE
Rosenfeld, C
Rubin, HA
Ruddick, K
Ryabov, VA
Saakyan, R
Sanchez, MC
Saoulidou, N
Schneps, J
Schoessow, PV
Schreiner, P
Schwienhorst, R
Semenov, VK
Seun, SM
Shanahan, P
Shield, PD
Shivane, R
Smart, W
Smirnitsky, V
Smith, C
Smith, PN
Sousa, A
Speakman, B
Stamoulis, P
Stefanik, A
Sullivan, P
Swan, JM
Symes, PA
Tagg, N
Talaga, RL
Terekhov, A
Tetteh-Lartey, E
Thomas, J
Thompson, J
Thomson, MA
Thron, JL
Trendler, R
Trevor, J
Trostin, I
Tsarev, VA
Tzanakos, G
Urheim, J
Vahle, P
Vakili, M
Vaziri, K
Velissaris, C
Verebryusov, V
Viren, B
Wai, L
Ward, CP
Ward, DR
Watabe, M
Weber, A
Webb, RC
Wehmann, A
West, N
White, C
White, RF
Wojcicki, SG
Wright, DM
Wu, QK
Yan, WG
Yang, T
Yumiceva, FX
Yun, JC
Zheng, H
Zois, M
Zwaska, R
AF Michael, D. G.
Adamson, P.
Alexopoulos, T.
Allison, W. W. M.
Alner, G. J.
Anderson, K.
Andreopoulos, C.
Andrews, M.
Andrews, R.
Arroyo, C.
Avvakumov, S.
Ayres, D. S.
Baller, B.
Barish, B.
Barker, M. A.
Barnes, P. D., Jr.
Barr, G.
Barrett, W. L.
Beall, E.
Bechtol, K.
Becker, B. R.
Belias, A.
Bergfeld, T.
Bernstein, R. H.
Bhattacharya, D.
Bishai, M.
Blake, A.
Bocean, V.
Bock, B.
Bock, G. J.
Boehm, J.
Boehnlein, D. J.
Bogert, D.
Border, P. M.
Bower, C.
Boyd, S.
Buckley-Geer, E.
Byon-Wagner, A.
Cabrera, A.
Chapman, J. D.
Chase, T. R.
Chernichenko, S. K.
Childress, S.
Choudhary, B. C.
Cobb, J. H.
Coleman, S. J.
Cossairt, J. D.
Courant, H.
Crane, D. A.
Culling, A. J.
Damiani, D.
Dawson, J. W.
de Jong, J. K.
DeMuth, D. M.
De Santo, A.
Dierckxsens, M.
Diwan, M. V.
Dorman, M.
Drake, G.
Ducar, R.
Durkin, T.
Erwin, A. R.
Escobar, C. O.
Evans, J. J.
Fackler, O. D.
Harris, E. Falk
Feldman, G. J.
Felt, N.
Fields, T. H.
Ford, R.
Frohne, M. V.
Gallagher, H. R.
Gebhard, M.
Godley, A.
Gogos, J.
Goodman, M. C.
Gornushkin, Yu.
Gouffon, P.
Grashorn, E. W.
Grossman, N.
Grudzinski, J. J.
Grzelak, K.
Guarino, V.
Habig, A.
Halsall, R.
Hanson, J.
Harris, D.
Harris, P. G.
Hartnell, J.
Hartouni, E. P.
Hatcher, R.
Heller, K.
Hill, N.
Ho, Y.
Howcroft, C.
Hylen, J.
Ignatenko, M.
Indurthy, D.
Irwin, G. M.
James, C.
Jenner, L.
Jensen, D.
Joffe-Minor, T.
Kafka, T.
Kang, H. J.
Kasahara, S. M. S.
Kilmer, J.
Kim, H.
Kim, M. S.
Koizumi, G.
Kopp, S.
Kordosky, M.
Koskinen, D. J.
Kostin, M.
Kotelnikov, S. K.
Krakauer, D. A.
Kumaratunga, S.
Ladran, A. S.
Lang, K.
Laughton, C.
Lebedev, A.
Lee, R.
Lee, W. Y.
Libkind, M. A.
Liu, J.
Litchfield, P. J.
Litchfield, R. P.
Longley, N. P.
Lucas, P.
Luebke, W.
Madani, S.
Maher, E.
Makeev, V.
Mann, W. A.
Marchionni, A.
Marino, A. D.
Marshak, M. L.
Marshall, J. S.
McDonald, J.
McGowan, A. M.
Meier, J. R.
Merzon, G. I.
Messier, M. D.
Milburn, R. H.
Miller, J. L.
Miller, W. H.
Mishra, S. R.
Miyagawa, P. S.
Moore, C. D.
Morfin, J.
Morse, R.
Mualem, L.
Mufson, S.
Murgia, S.
Murtagh, M. J.
Musser, J.
Naples, D.
Nelson, C.
Nelson, J. K.
Newman, H. B.
Nezrick, F.
Nichol, R. J.
Nicholls, T. C.
Ochoa-Ricoux, J. P.
Oliver, J.
Oliver, W. P.
Onuchino, V. A.
Osiecki, T.
Ospanov, R.
Paley, J.
Paolone, V.
Para, A.
Patzak, T.
Pavlovic, Z.
Pearce, G. F.
Pearson, N.
Peck, C. W.
Perry, C.
Peterson, E. A.
Petyt, D. A.
Ping, H.
Piteira, R.
Pla-Dalmau, A.
Plunkett, R. K.
Price, L. E.
Proga, M.
Pushka, D. R.
Rahman, D.
Rameika, R. A.
Raufer, T. M.
Read, A. L.
Rebel, B.
Reyna, D. E.
Rosenfeld, C.
Rubin, H. A.
Ruddick, K.
Ryabov, V. A.
Saakyan, R.
Sanchez, M. C.
Saoulidou, N.
Schneps, J.
Schoessow, P. V.
Schreiner, P.
Schwienhorst, R.
Semenov, V. K.
Seun, S. -M.
Shanahan, P.
Shield, P. D.
Shivane, R.
Smart, W.
Smirnitsky, V.
Smith, C.
Smith, P. N.
Sousa, A.
Speakman, B.
Stamoulis, P.
Stefanik, A.
Sullivan, P.
Swan, J. M.
Symes, P. A.
Tagg, N.
Talaga, R. L.
Terekhov, A.
Tetteh-Lartey, E.
Thomas, J.
Thompson, J.
Thomson, M. A.
Thron, J. L.
Trendler, R.
Trevor, J.
Trostin, I.
Tsarev, V. A.
Tzanakos, G.
Urheim, J.
Vahle, P.
Vakili, M.
Vaziri, K.
Velissaris, C.
Verebryusov, V.
Viren, B.
Wai, L.
Ward, C. P.
Ward, D. R.
Watabe, M.
Weber, A.
Webb, R. C.
Wehmann, A.
West, N.
White, C.
White, R. F.
Wojcicki, S. G.
Wright, D. M.
Wu, Q. K.
Yan, W. G.
Yang, T.
Yumiceva, F. X.
Yun, J. C.
Zheng, H.
Zois, M.
Zwaska, R.
TI The magnetized steel and scintillator calorimeters of the MINOS
experiment
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE Detectors: neutrino; Detectors: scintillator; Calorimeters: tracking;
Extruded plastic scintillator
ID FRONT-END ELECTRONICS; INJECTION CALIBRATION SYSTEM; LONG-BASE-LINE;
RABBIT SYSTEM; FAR DETECTOR; OSCILLATION; RANGE; PHOTOMULTIPLIERS;
PERFORMANCE; FIBERS
AB The Main Injector Neutrino Oscillation Search (MINOS) experiment uses an accelerator-produced neutrino beam to perform precision measurements of the neutrino oscillation parameters in the "atmospheric neutrino" sector associated with muon neutrino disappearance. This long-baseline experiment measures neutrino interactions in Fermilab's NuMI neutrino beam with a near detector at Fermilab and again 735 km downstream with a far detector in the Soudan Underground Laboratory in northern Minnesota. The two detectors are magnetized steel-scintillator tracking calorimeters. They are designed to be as similar as possible in order to ensure that differences in detector response have minimal impact on the comparisons of event rates, energy spectra and topologies that are essential to MINOS measurements of oscillation parameters. The design, construction, calibration and performance of the far and near detectors are described in this paper. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Bock, B.; Grashorn, E. W.; Habig, A.; Koskinen, D. J.] Univ Minnesota, Dept Phys, Duluth, MN 55812 USA.
[Andreopoulos, C.; Saoulidou, N.; Stamoulis, P.; Tzanakos, G.; Zois, M.] Univ Athens, Dept Phys, GR-15771 Athens, Greece.
[Frohne, M. V.; Schreiner, P.] Benedictine Univ, Dept Phys, Lisle, IL 60532 USA.
[Bishai, M.; Dierckxsens, M.; Diwan, M. V.; Murtagh, M. J.; Viren, B.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Michael, D. G.; Barish, B.; Choudhary, B. C.; Hanson, J.; Howcroft, C.; Kim, H.; Mualem, L.; Newman, H. B.; Ochoa-Ricoux, J. P.; Peck, C. W.; Smith, C.; Trevor, J.; Zheng, H.] CALTECH, Lauritsen Lab, Pasadena, CA 91125 USA.
[Blake, A.; Chapman, J. D.; Culling, A. J.; Howcroft, C.; Marshall, J. S.; Thomson, M. A.; Ward, C. P.; Ward, D. R.] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England.
[Escobar, C. O.] Univ Estadual Campinas, IF UNICAMP, BR-13083970 Campinas, SP, Brazil.
[Yan, W. G.] Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China.
[Patzak, T.; Piteira, R.] Univ Paris 07, APC, F-75205 Paris 13, France.
[Ho, Y.; Lee, W. Y.] Columbia Univ, Dept Phys, New York, NY 10027 USA.
[Adamson, P.; Anderson, K.; Andrews, M.; Andrews, R.; Baller, B.; Bernstein, R. H.; Bocean, V.; Bock, G. J.; Boehnlein, D. J.; Bogert, D.; Buckley-Geer, E.; Byon-Wagner, A.; Childress, S.; Choudhary, B. C.; Cossairt, J. D.; Ducar, R.; Ford, R.; Grossman, N.; Grzelak, K.; Harris, D.; Hatcher, R.; Hylen, J.; James, C.; Jensen, D.; Kilmer, J.; Koizumi, G.; Laughton, C.; Lucas, P.; Makeev, V.; Marchionni, A.; Marino, A. D.; Moore, C. D.; Morfin, J.; Nelson, C.; Nelson, J. K.; Nezrick, F.; Para, A.; Pla-Dalmau, A.; Plunkett, R. K.; Pushka, D. R.; Rameika, R. A.; Read, A. L.; Rebel, B.; Saoulidou, N.; Shanahan, P.; Smart, W.; Stefanik, A.; Thomas, J.; Trendler, R.; Vaziri, K.; Wehmann, A.; Yun, J. C.; Zwaska, R.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Boehm, J.; Feldman, G. J.; Felt, N.; Lebedev, A.; Lee, R.; Mishra, S. R.; Oliver, J.; Sanchez, M. C.; Seun, S. -M.] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
[de Jong, J. K.; Luebke, W.; Rubin, H. A.; White, C.] IIT, Div Phys, Chicago, IL 60616 USA.
[Bower, C.; Gebhard, M.; Messier, M. D.; Miller, J. L.; Mufson, S.; Musser, J.; Paley, J.; Rebel, B.; Urheim, J.] Indiana Univ, Bloomington, IN 47405 USA.
[Chernichenko, S. K.; Makeev, V.; Onuchino, V. A.; Semenov, V. K.] Inst High Energy Phys, RU-140284 Protvino, Moscow Region, Russia.
[Smirnitsky, V.; Trostin, I.; Verebryusov, V.] ITEP, High Energy Expt Phys Dept, Moscow 117218, Russia.
[Miller, J. L.] James Madison Univ, Dept Phys, Harrisonburg, VA 22807 USA.
[Belias, A.; Gornushkin, Yu.; Ignatenko, M.] Joint Inst Nucl Res, RU-141980 Dubna, Moscow Region, Russia.
[Kotelnikov, S. K.; Merzon, G. I.; Ryabov, V. A.; Terekhov, A.; Tsarev, V. A.] PN Lebedev Phys Inst, Dept Nucl Phys, Moscow 117924, Russia.
[Barnes, P. D., Jr.; Fackler, O. D.; Hartouni, E. P.; Ladran, A. S.; Libkind, M. A.; Swan, J. M.; Wright, D. M.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Adamson, P.; Dorman, M.; Evans, J. J.; Jenner, L.; Kordosky, M.; Koskinen, D. J.; Nichol, R. J.; Saakyan, R.; Smith, C.; Thomas, J.; Vahle, P.] UCL, Dept Phys & Astron, London WC1E 6BT, England.
[Beall, E.; Becker, B. R.; Border, P. M.; Chase, T. R.; Courant, H.; DeMuth, D. M.; Gallagher, H. R.; Gogos, J.; Grashorn, E. W.; Heller, K.; Kasahara, S. M. S.; Kumaratunga, S.; Litchfield, P. J.; Longley, N. P.; Maher, E.; Marshak, M. L.; McGowan, A. M.; Meier, J. R.; Miller, W. H.; Mualem, L.; Nelson, J. K.; Pearson, N.; Peterson, E. A.; Petyt, D. A.; Rahman, D.; Ruddick, K.; Schwienhorst, R.; Shivane, R.; Speakman, B.; Urheim, J.] Univ Minnesota, Minneapolis, MN 55455 USA.
[Allison, W. W. M.; Barker, M. A.; Barr, G.; Cabrera, A.; Cobb, J. H.; De Santo, A.; Gallagher, H. R.; Hartnell, J.; Litchfield, R. P.; Miyagawa, P. S.; Perry, C.; Petyt, D. A.; Raufer, T. M.; Shield, P. D.; Sousa, A.; Sullivan, P.; Tagg, N.; Weber, A.; West, N.] Univ Oxford, Subdept Particle Phys, Oxford OX1 3RH, England.
[Bhattacharya, D.; Boyd, S.; Kim, M. S.; McDonald, J.; Naples, D.; Paolone, V.; Thompson, J.] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA.
[Alner, G. J.; Andreopoulos, C.; Belias, A.; Durkin, T.; Halsall, R.; Hartnell, J.; Litchfield, P. J.; Madani, S.; Nicholls, T. C.; Pearce, G. F.; Petyt, D. A.; Raufer, T. M.; Weber, A.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Gouffon, P.] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil.
[Bergfeld, T.; Godley, A.; Mishra, S. R.; Rosenfeld, C.; Wu, Q. K.] Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA.
[Avvakumov, S.; Irwin, G. M.; Kang, H. J.; Murgia, S.; Wai, L.; Wojcicki, S. G.; Yang, T.] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
[Adamson, P.; Harris, E. Falk; Harris, P. G.; Hartnell, J.; Morse, R.; Smith, C.; Smith, P. N.; Symes, P. A.; White, R. F.] Univ Sussex, Dept Phys & Astron, Brighton BN1 9QH, E Sussex, England.
[Tetteh-Lartey, E.; Vakili, M.; Watabe, M.; Webb, R. C.] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA.
[Indurthy, D.; Kopp, S.; Kordosky, M.; Kostin, M.; Lang, K.; Liu, J.; Osiecki, T.; Ospanov, R.; Pavlovic, Z.; Proga, M.; Vahle, P.; Zwaska, R.] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA.
[Gallagher, H. R.; Kafka, T.; Mann, W. A.; Milburn, R. H.; Oliver, W. P.; Patzak, T.; Sanchez, M. C.; Schneps, J.; Sousa, A.; Tagg, N.] Tufts Univ, Dept Phys, Medford, MA 02155 USA.
[Barrett, W. L.] Western Washington Univ, Dept Phys, Bellingham, WA 98225 USA.
[Bechtol, K.; Coleman, S. J.; Damiani, D.; Kordosky, M.; Nelson, J. K.; Vahle, P.; Yumiceva, F. X.] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA.
[Grzelak, K.] Warsaw Univ, Fac Phys, PL-00681 Warsaw, Poland.
[Alexopoulos, T.; Erwin, A. R.; Ping, H.; Velissaris, C.] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
[Ayres, D. S.; Beall, E.; Crane, D. A.; Dawson, J. W.; Drake, G.; Fields, T. H.; Gallagher, H. R.; Goodman, M. C.; Grudzinski, J. J.; Guarino, V.; Hill, N.; Joffe-Minor, T.; Krakauer, D. A.; McGowan, A. M.; Price, L. E.; Reyna, D. E.; Sanchez, M. C.; Schoessow, P. V.; Talaga, R. L.; Thron, J. L.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Habig, A (reprint author), Univ Minnesota, Dept Phys, Duluth, MN 55812 USA.
EM ahabig@umn.edu
RI Gouffon, Philippe/I-4549-2012; Nichol, Ryan/C-1645-2008; Inst. of
Physics, Gleb Wataghin/A-9780-2017; Semenov, Vitaliy/E-9584-2017;
Harris, Philip/I-7419-2012; Gornushkin, Yury/F-4788-2013; Ryabov,
Vladimir/E-1281-2014; Koskinen, David/G-3236-2014; Merzon,
Gabriel/N-2630-2015; Evans, Justin/P-4981-2014; Kotelnikov,
Sergey/A-9711-2014;
OI Gouffon, Philippe/0000-0001-7511-4115; Harris,
Philip/0000-0003-4369-3874; Gornushkin, Yury/0000-0003-3524-4032;
Thomson, Mark/0000-0002-2654-9005; Koskinen, David/0000-0002-0514-5917;
Evans, Justin/0000-0003-4697-3337; Kotelnikov,
Sergey/0000-0002-8027-4612; Marchionni, Alberto/0000-0003-3039-9537;
Hartnell, Jeffrey/0000-0002-1744-7955; Bernstein,
Robert/0000-0002-7610-950X; Weber, Alfons/0000-0002-8222-6681; Hartouni,
Edward/0000-0001-9869-4351
FU U.S. Department of Energy; U.K. Particle Physics and Astronomy Research
Council; U.S. National Science Foundation; State and University of
Minnesota; FAPESP (Fundacao de Amparo a Pesquisa do Estado de Sao
Paulo); CNPq (Conselho Nacional de Desenvolvimento Cientifico e
Tecnologico) in Brazil
FX This work was supported by the U.S. Department of Energy, the U.K.
Particle Physics and Astronomy Research Council, the U.S. National
Science Foundation, the State and University of Minnesota, the Office of
Special Accounts for Research Grants of the University of Athens,
Greece, and FAPESP (Fundacao de Amparo a Pesquisa do Estado de Sao
Paulo) and CNPq (Conselho Nacional de Desenvolvimento Cientifico e
Tecnologico) in Brazil. This experiment would not have been possible
without the dedicated efforts of the members of the Fermilab Accelerator
and Particle Physics Divisions in building and operating the NuMI
neutrino beamline. We thank the members of the Beam Design Group at the
Institute for High Energy Physics, Protvino, Russia for their important
contributions to the designs of the neutrino-beam target and horn
systems. We gratefully acknowledge the Minnesota Department of Natural
Resources for their assistance and for allowing us access to the
facilities of the Soudan Underground Mine State Park. We also thank the
crew of the Soudan Underground Laboratory for their tireless work in
building and operating the MINOS far detector. Students in the
University of Minnesota Mechanical Engineering Department made
substantial contributions to the design of the scintillator module
crimping machine.
NR 61
TC 140
Z9 140
U1 0
U2 15
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 NOV 1
PY 2008
VL 596
IS 2
BP 190
EP 228
DI 10.1016/j.nima.2008.08.003
PG 39
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 377ZS
UT WOS:000261291500006
ER
PT J
AU Jovanovic, I
Shverdin, M
Gibson, D
Brown, C
Gronberg, J
AF Jovanovic, Iaor
Shverdin, Miro
Gibson, David
Brown, Curtis
Gronberg, Jeff
TI High-Power Picosecond Pulse Recirculation for Inverse Compton Scattering
SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS
LA English
DT Proceedings Paper
CT Int Conf on Structure and Interactions of the Photon/17th Int Workshop
on Photon-Photon Collisions/Int Workshop on High Energy Photon Linear
Colliders
CY JUL 09-13, 2007
CL Sorbonne, Paris, FRANCE
HO Sorbonne
ID PHOTON COLLIDER; CAVITY
AB In the next generation of linear colliders, inverse Compton scattering (ICS) of intense laser pulses on relativistic electron bunches will enable a mode of operation based on energetic gamma e and gamma gamma collisions, with a significant complementary scientific potential. The efficiency of gamma-ray generation via ICS is constrained by the Thomson scattering cross section, resulting in typical laser photon-to-gamma efficiencies of <10(-9). Furthermore, repetition rates of the state-of-art high-energy short-pulse lasers are poorly matched with those available from electron accelerators. Laser recirculation has been proposed as a method to address those limitations, but has been limited to only small pulse energies and peak powers. We propose and experimentally demonstrate an alternative, non-interferometric method for laser pulse recirculation that is uniquely capable of recirculating short pulses with energies exceeding 1 J [1]. ICS of recirculated Joule-level laser pulses is compatible with the proposed pulse structure for ILC and has a potential to produce unprecedented peak and average gamma-ray brightness in the next generation of sources.
C1 [Jovanovic, Iaor] Purdue Univ, Sch Nucl Engn, W Lafayette, IN 47907 USA.
[Jovanovic, Iaor; Shverdin, Miro; Gibson, David; Brown, Curtis; Gronberg, Jeff] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Jovanovic, I (reprint author), Purdue Univ, Sch Nucl Engn, 400 Cent Dr, W Lafayette, IN 47907 USA.
NR 11
TC 0
Z9 0
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5632
J9 NUCL PHYS B-PROC SUP
JI Nucl. Phys. B-Proc. Suppl.
PD NOV
PY 2008
VL 184
BP 289
EP 294
DI 10.1016/j.nuclphysbps.2008.09.178
PG 6
WC Physics, Particles & Fields
SC Physics
GA 386IJ
UT WOS:000261876600054
ER
PT J
AU Warsa, JS
AF Warsa, James S.
TI A Continuous Finite Element-Based, Discontinuous Finite Element Method
for S-N Transport
SO NUCLEAR SCIENCE AND ENGINEERING
LA English
DT Article
ID DIFFUSION SYNTHETIC ACCELERATION; SPATIAL DISCRETIZATION SCHEME;
ASYMPTOTIC SOLUTIONS; TETRAHEDRAL MESHES; OPTICALLY THICK; POLYGONS;
GEOMETRY; REGIMES
AB A class of discontinuous finite element methods (DFEMs) is proposed for spatially discretizing the S-N transport equation in multidimensions. Mesh cells are first subdivided into simplexes. Equations for the angular fluxes in a cell are then generated by computing the linear DFEM SN equations for a simplex on each subelement and assembling the equations over the subelements. The result is a (piecewise) linear continuous finite element method spatial discretization on the cell that is coupled discontinuously to its neighbors through the standard DFEM upwinding technique. The method is presented in two-dimensional Cartesian coordinates. Numerical experiments indicate the method has numerical properties that are suitable for a new SN spatial discretization.
C1 Los Alamos Natl Lab, Comp Computat & Stat Sci Div, Computat Phys & Methods Grp, Transport Methods Sect, Los Alamos, NM 87545 USA.
RP Warsa, JS (reprint author), Los Alamos Natl Lab, Comp Computat & Stat Sci Div, Computat Phys & Methods Grp, Transport Methods Sect, Los Alamos, NM 87545 USA.
EM warsa@lanl.gov
FU U.S. Department of Energy [DE-AC52-06NA25396]
FX The author would like to thank J. Chang of Los Alamos National
Laboratory (LANL) for his help in implementing the methods and in
improving the presentation. The author would like to thank T. Bailey of
Texas A&M University for her help with the PWLD method. The author would
like to acknowledge J. Morel of Texas A&M University, A. Prinja of the
University of New Mexico, and T. Urbatsch of LANL for helpful
discussions and support of this work. Finally, the author would like to
thank M. Adams of Texas A&M University for bringing the
point-in-the-middle DFEM to his attention. This information has been
authored by an employee or employees of the Los Alamos National
Security, LLC operator of LANL under contract DE-AC52-06NA25396 with the
U.S. Department of Energy.
NR 24
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Z9 8
U1 0
U2 0
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5639
J9 NUCL SCI ENG
JI Nucl. Sci. Eng.
PD NOV
PY 2008
VL 160
IS 3
BP 385
EP 400
PG 16
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 363SH
UT WOS:000260286500010
ER
PT J
AU Birkholzer, J
AF Birkholzer, Jens
TI RECENT ADVANCES IN NUCLEAR WASTE ISOLATION THROUGH SIMULATIONS WITH THE
TOUGH CODES
SO NUCLEAR TECHNOLOGY
LA English
DT Editorial Material
C1 Lawrence Berkeley Natl Lab, Div Earth Sci, Nucl Energy & Waste Program, Berkeley, CA USA.
RP Birkholzer, J (reprint author), Lawrence Berkeley Natl Lab, Div Earth Sci, Nucl Energy & Waste Program, Berkeley, CA USA.
RI Birkholzer, Jens/C-6783-2011
OI Birkholzer, Jens/0000-0002-7989-1912
NR 0
TC 0
Z9 0
U1 0
U2 1
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
J9 NUCL TECHNOL
JI Nucl. Technol.
PD NOV
PY 2008
VL 164
IS 2
BP 153
EP 154
PG 2
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 364RM
UT WOS:000260352800001
ER
PT J
AU Kowalsky, MB
Birkholzer, J
Peterson, J
Finsterle, S
Mukhopadhyay, S
Tsang, Y
AF Kowalsky, M. B.
Birkholzer, J.
Peterson, J.
Finsterle, S.
Mukhopadhyay, S.
Tsang, Y.
TI SENSITIVITY ANALYSIS FOR JOINT INVERSION OF GROUND-PENETRATING RADAR AND
THERMAL-HYDROLOGICAL DATA FROM A LARGE-SCALE UNDERGROUND HEATER TEST
SO NUCLEAR TECHNOLOGY
LA English
DT Article
DE hydrogeophysics; joint inversion; ground-penetrating radar
ID TIME-DOMAIN REFLECTOMETRY; VADOSE ZONE; WATER SATURATION; YUCCA
MOUNTAIN; FLOW; TRANSPORT; MODEL
AB We describe a joint inversion approach that combines geophysical and thermal-hydrological data for the estimation of (a) thermal-hydrological parameters (such as permeability, porosity, thermal conductivity, and parameters of the capillary pressure and relative permeability functions) that are necessary for predicting the flow of fluids and heat in fractured porous media and (b) parameters of the petrophysical function that relates water saturation, porosity, and temperature to the dielectric constant. The approach incorporates the coupled simulation of nonisothermal multiphase fluid flow and ground-penetrating radar (GPR) travel times within an optimization framework. We discuss application of the approach to a large-scale in situ heater test that was conducted at Yucca Mountain, Nevada, to better understand the coupled thermal, hydrological, mechanical, and chemical processes that may occur in the fractured rock mass around a geologic repository for high-level radioactive waste. We provide a description of the time-lapse geophysical data (i.e., cross-borehole GPR) and thermal-hydrological data (i.e., temperature and water content data) collected before and during the 4-yr heating phase of the test and analyze the sensitivity of the most relevant thermal-hydrological and petrophysical parameters to the available data. To demonstrate feasibility of the approach, and as a first step toward comprehensive inversion of the heater test data, we apply the approach to estimate a single parameter: the permeability of the rock matrix.
C1 [Kowalsky, M. B.; Birkholzer, J.; Peterson, J.; Finsterle, S.; Mukhopadhyay, S.; Tsang, Y.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Kowalsky, MB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, 1 Cyclotron Rd,MS 90-1116, Berkeley, CA 94720 USA.
EM MBKowalsky@lbl.gov
RI Finsterle, Stefan/A-8360-2009; Birkholzer, Jens/C-6783-2011
OI Finsterle, Stefan/0000-0002-4446-9906; Birkholzer,
Jens/0000-0002-7989-1912
FU Lawrence Berkeley National Laboratory; Director, Office of Science, of
the DOE [DE-AC02-05CH11231]
FX The authors would like to thank the anonymous reviewers and M. Commer
for their thorough review of this paper. This work was supported by
Laboratory Directed Research and Development funding from Lawrence
Berkeley National Laboratory, provided by the Director, Office of
Science, of the DOE under contract DE-AC02-05CH11231.
NR 42
TC 3
Z9 3
U1 0
U2 4
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
J9 NUCL TECHNOL
JI Nucl. Technol.
PD NOV
PY 2008
VL 164
IS 2
BP 169
EP 179
PG 11
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 364RM
UT WOS:000260352800003
ER
PT J
AU Zhang, GX
Spycher, N
Sonnenthal, E
Steefel, C
Xu, TF
AF Zhang, Guoxiang
Spycher, Nicolas
Sonnenthal, Eric
Steefel, Carl
Xu, Tianfu
TI MODELING REACTIVE MULTIPHASE FLOW AND TRANSPORT OF CONCENTRATED
SOLUTIONS
SO NUCLEAR TECHNOLOGY
LA English
DT Article
DE Yucca Mountain; Pitzer model; dryout
ID CHEMICAL-EQUILIBRIUM MODEL; AQUEOUS CALCIUM-CHLORIDE; ION-INTERACTION
MODEL; YUCCA MOUNTAIN; NATURAL-WATERS; MINERAL SOLUBILITIES;
THERMODYNAMIC PROPERTIES; GEOCHEMICAL TRANSPORT; CATION-EXCHANGE;
PREDICTION
AB A Pitzer ion-interaction model for concentrated aqueous solutions was added to the reactive multiphase flow and transport code TOUGHREACT The model is described and verified against published experimental data and the geochemical code EQ3/6. The model is used to simulate water-rock-gas interactions caused by boiling and evaporation within and around nuclear waste emplacement tunnels at the proposed high-level waste repository at Yucca Mountain, Nevada. The coupled thermal, hydrological, and chemical processes considered consist of water and air/vapor flow, evaporation, boiling, condensation, solute and gas transport, formation of highly concentrated brines, precipitation of deliquescent salts, generation of acid gases, and vapor-pressure lowering caused by the high salinity of the concentrated brine.
C1 [Zhang, Guoxiang; Spycher, Nicolas; Sonnenthal, Eric; Steefel, Carl; Xu, Tianfu] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Zhang, GX (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd,MS 90-1116, Berkeley, CA 94720 USA.
EM gxzhang@lbl.gov
RI Steefel, Carl/B-7758-2010; Spycher, Nicolas/E-6899-2010; Sonnenthal,
Eric/A-4336-2009
FU Office of the Chief Scientist, Office of Civilian Radioactive Waste
Management; Lawrence Berkeley National Laboratory through the U.S.
Department of Energy [DE-AC02-05CH11231]
FX We thank S. Mukhopadhyay, C. Bryan, M. Zhu, and two anonymous reviewers
for their valuable comments and suggestions, as well as D. Hawkes for
his technical editing support. This work was supported by the Office of
the Chief Scientist, Office of Civilian Radioactive Waste Management,
provided to Lawrence Berkeley National Laboratory through the U.S.
Department of Energy contract DE-AC02-05CH11231.
NR 44
TC 10
Z9 11
U1 1
U2 11
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
J9 NUCL TECHNOL
JI Nucl. Technol.
PD NOV
PY 2008
VL 164
IS 2
BP 180
EP 195
PG 16
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 364RM
UT WOS:000260352800004
ER
PT J
AU Ha, KS
Jeong, HY
Kwon, YM
Lee, YB
Hahn, D
Cahalan, JE
Dunn, FE
AF Ha, Kwi Seok
Jeong, Hae Yong
Kwon, Young Min
Lee, Yong Bum
Hahn, Dohee
Cahalan, James E.
Dunn, Floyd E.
TI AN ENHANCED CODE FOR THE SAFETY ANALYSIS OF POOL-TYPE SODIUM-COOLED FAST
REACTORS
SO NUCLEAR TECHNOLOGY
LA English
DT Article
DE SSC-K; 3-D thermal-hydraulic model; KALIMER conceptual design
AB The Super System Code of the Korea Atomic Energy Research Institute (SSC-K) has been developed for the transient analysis of the Korea Advanced LIquid MEtal Reactor (KALIMER) system. Recently, a detailed three-dimensional (3-D) core thermal-hydraulic model was developed to describe nonuniformities of radial temperature and flow within a subassembly and to decrease the uncertainties in the reactor safety margins during accident situations. The Shutdown Heat Removal Test-17 (SHRT-17) performed in the Experimental Breeder Reactor-II (EBR-II) and the postulated unscrammed events for the KALIMER conceptual design have been analyzed using a code system that has coupled a detailed 3-D core thermal-hydraulic model with SSC-K. The coupled code predicted behaviors for the experimental trends for the protected loss-of-flow SHRT-17. The KALIMER-150 design was adopted for a plant application of the same code system. Three events, unprotected transient overpower (UTOP), unprotected loss of flow (ULOF), and unprotected loss of heat sink (ULOHS) were analyzed, and the simulation results were compared to those obtained using another code system that has coupled the Safety Analysis Section SYStem (SASSYS)-1 code with the same detailed 3-D core thermal-hydraulic model. The results, calculated with SSC-K coupled with the detailed 3-D core thermal-hydraulic model showed good agreement with the calculated results of the SASSYS-1 coupled code system for the UTOP and ULOF; however, some discrepancies were shown in the results for the ULOHS. These were found to have occurred because of a difference of the modeling for the decay heat removal system and primary coolant inventory. Through these analyses, the coupled code system was validated in order to be available for the safety analysis of a liquid-metal reactor (LMR) plant.
C1 [Ha, Kwi Seok; Jeong, Hae Yong; Kwon, Young Min; Lee, Yong Bum; Hahn, Dohee] Korea Atom Energy Res Inst, Taejon, Yuseong, South Korea.
[Cahalan, James E.; Dunn, Floyd E.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Ha, KS (reprint author), Korea Atom Energy Res Inst, 150-1 Dukjin Dong,1045 Daedeokdaero, Taejon, Yuseong, South Korea.
EM ksha@kaeri.re.kr
NR 8
TC 0
Z9 0
U1 0
U2 0
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
J9 NUCL TECHNOL
JI Nucl. Technol.
PD NOV
PY 2008
VL 164
IS 2
BP 221
EP 231
PG 11
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 364RM
UT WOS:000260352800007
ER
PT J
AU Geelhood, K
Matson, D
Senor, D
Painter, C
AF Geelhood, Kenneth
Matson, Dean
Senor, David
Painter, Chad
TI SPHERICAL FUEL ELEMENT CONCEPT FOR SMALL REACTOR DESIGN
SO NUCLEAR TECHNOLOGY
LA English
DT Article
DE atoms for peace reactor; small reactor; spherical fuel element
AB The Pacific Northwest National Laboratory (PNNL) is currently developing a novel spherical fuel element concept that offers low fuel temperatures, low stored energy, and long core life. Fuel performance modeling has been conducted using the PNNL-developed Atoms for Peace Reactor (AFPR)-100 as a platform for demonstrating the potential of the fuel element concept. The AFPR-100 is a small [100-MW(electric), 300-MW(thermal)], water-cooled reactor concept that is designed to use established technology, be passively safe, and be proliferation resistant. The fuel performance modeling has demonstrated that this fuel element has a short thermal time constant, has low fuel temperature, provides a barrier for retention of fission products, and will have long-term dimensional stability.
A technique for manufacturing these fuel elements was developed. A fabrication demonstration was conducted in cooperation with a commercial vendor to evaluate the feasibility of manufacturing the fuel elements. In order to demonstrate the proposed technique, the proposed spherical elements were produced using existing processes that could be scaled to large batch sizes. Surrogate ZrO2 kernels were substituted for the fuel in this demonstration. Thorough characterization of the fuel elements was performed at various stages in the fabrication process. The metallographic characterization included electron microscopic analysis of coating microstructure, and particular attention was paid to interface regions to search for deleterious reaction zones, debonding, and porosity. Although this demonstration is not complete, early results are promising and will be discussed in this paper.
This paper will describe the fuel element, show the results of fuel performance calculations for this element, describe the proposed fabrication process, and discuss the results of a fabrication demonstration to date that has been performed for this concept.
C1 [Geelhood, Kenneth; Matson, Dean; Senor, David; Painter, Chad] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Geelhood, K (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd,POB 999, Richland, WA 99352 USA.
EM kenneth.geelhood@pnl.gov
NR 18
TC 0
Z9 0
U1 2
U2 2
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
J9 NUCL TECHNOL
JI Nucl. Technol.
PD NOV
PY 2008
VL 164
IS 2
BP 255
EP 264
PG 10
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 364RM
UT WOS:000260352800010
ER
PT J
AU Kim, ES
Oh, CH
No, HC
AF Kim, Eung Soo
Oh, Chang Ho
No, Hee Cheon
TI EXPERIMENTAL STUDY AND MODEL DEVELOPMENT ON THE MOISTURE EFFECT FOR
NUCLEAR GRAPHITE OXIDATION
SO NUCLEAR TECHNOLOGY
LA English
DT Article
DE high-temperature gas-cooled reactor; moisture effect for graphite
oxidation
ID GRADE GRAPHITES; IG-110; FLOW
AB A number of experiments were carried out to investigate the effect of moisture-which is always present in environmental air-on the graphite oxidation rate. A porous metal with 10-mu m pores was used to enhance the humidification at the outlet of the vertical column that is full of water and is designed to increase the moisture on the helium gas when it is passed through the porous media located at the bottom of the water column. The relative humidity (RH) of the mixture was controlled between 0 and 70% by a humidity sensor. The experiment was performed at temperatures ranging from 873 to 1573 K, mole fractions of oxygen from 0.09 to 0.17, and,9 RH from 0 to 70% at the normal condition.
Assuming that the effect of moisture affects only the mass transfer, we derived a theoretical model for mass transfer that included the fast homogeneous CO combustion reaction. The present model shows that the mass transfer rate of humid air is half of the mass transfer rate for dry air. The predictions by the model agree with experimental data within 17%.
C1 [Kim, Eung Soo; Oh, Chang Ho] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
[No, Hee Cheon] Korea Adv Inst Sci & Technol, Dept Nucl & Quantum Engn, Taejon 305701, South Korea.
RP Kim, ES (reprint author), Idaho Natl Lab, POB 1625, Idaho Falls, ID 83415 USA.
EM Chang.Oh@inl.gov
RI NO, Hee Cheon/C-1866-2011
FU Korean Research Foundation; Korean government (MOEHRD)
[KRF-2006-352-D00210]
FX This work was supported by the Korean Research Foundation grant funded
by the Korean government (MOEHRD) (KRF-2006-352-D00210).
NR 11
TC 3
Z9 5
U1 3
U2 5
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
J9 NUCL TECHNOL
JI Nucl. Technol.
PD NOV
PY 2008
VL 164
IS 2
BP 278
EP 285
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 364RM
UT WOS:000260352800012
ER
PT J
AU Khamayseh, A
de Almeida, V
Hansen, G
AF Khamayseh, Ahmed
de Almeida, Valmor
Hansen, Glen
TI Hybrid Surface Mesh Adaptation for Climate Modeling
SO NUMERICAL MATHEMATICS-THEORY METHODS AND APPLICATIONS
LA English
DT Article
DE surface mesh generation; mesh adaptation; mesh optimization; climate
modeling
AB Solution-driven mesh adaptation is becoming quite popular for spatial error control in the numerical simulation of complex computational physics applications, such as climate modeling. Typically, spatial adaptation is achieved by element subdivision (h adaptation) with a primary goal of resolving the local length scales of interest. A second, less-popular method of spatial adaptivity is called "mesh motion" (r adaptation); the smooth repositioning of mesh node points aimed at resizing existing elements to capture the local length scales. This paper proposes an adaptation method based on a combination of both element subdivision and node point repositioning (rh adaptation). By combining these two methods using the notion of a mobility function, the proposed approach seeks to increase the flexibility and extensibility of mesh motion algorithms while providing a somewhat smoother transition between refined regions than is produced by element subdivision alone. Further, in an attempt to support the requirements of a very general class of climate simulation applications, the proposed method is designed to accommodate unstructured, polygonal mesh topologies in addition to the most popular mesh types.
C1 [Khamayseh, Ahmed; de Almeida, Valmor] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
[Hansen, Glen] Idaho Natl Lab, Multiphys Methods Grp, Idaho Falls, ID 83415 USA.
RP Khamayseh, A (reprint author), Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
EM khamaysehak@ornl.gov; dealmeidav@ornl.gov; Glen.Hansen@inl.gov
RI de Almeida, Valmor/P-5498-2016
OI de Almeida, Valmor/0000-0003-0899-695X
NR 28
TC 1
Z9 1
U1 2
U2 3
PU GLOBAL SCIENCE PRESS
PI WANCHAI
PA ROOM 3208, CENTRAL PLAZA, 18 HARBOUR RD, WANCHAI, HONG KONG 00000,
PEOPLES R CHINA
SN 1004-8979
J9 NUMER MATH-THEORY ME
JI Numer. Math.-Theory Methods Appl.
PD NOV
PY 2008
VL 1
IS 4
BP 410
EP 434
PG 25
WC Mathematics, Applied; Mathematics
SC Mathematics
GA V10OU
UT WOS:000207474100003
ER
PT J
AU Williams, PT
AF Williams, Paul T.
TI Increases in Weight and Body Size Increase the Odds for Hypertension
During 7 Years of Follow-up
SO OBESITY
LA English
DT Article
ID HIGH BLOOD-PRESSURE; FAT DISTRIBUTION; RISK-FACTORS; MASS INDEX;
CARDIOVASCULAR-DISEASE; VIGOROUS EXERCISE; PHYSICAL-ACTIVITY;
NORMOTENSIVE MEN; JAPANESE MEN; WOMEN
AB Changes in BMI and body size were compared to incident hypertension in 24,550 men and 10,111 women followed prospectively as part of the National Runners' Health Study to test whether long-term weight change affects hypertension risk. Incident hypertensions were reported by 2,143 men and 430 women during (mean +/- s.d.) 7.8 +/- 1.8 and 7.5 +/- 2.0 years of follow-up, respectively. Despite being active, men's and women's BMI increased 1.15 +/- 1.70 and 0.95 +/- 1.89 kg/m(2), respectively, and their waist circumferences increased 2.97 +/- 5.02 and 3.29 +/- 6.67 cm, respectively. Compared to those whose BMI declined, those who gained >= 2.4 kg/m(2) had an odds ratio (95% confidence interval) of 1.68 (1.45, 1.94) for becoming hypertensive if male and 1.42 (1.05, 1.92) if female. Men whose waist circumference increased = 6 cm had an odds ratio of 1.22 (1.01, 1.47) for becoming hypertensive compared to those whose waists decreased. In both sexes, the odds for hypertension were significantly related to BMI at follow-up when adjusted for baseline BMI, but generally not to baseline BMI when adjusted for follow-up BMI. In the subset whose weights remained relatively unchanged during follow-up (+/- 0.4 kg/m(2)), each kg/m(2) increment in BMI was associated with an odds ratio for becoming hypertensive of 1.19 (1.14, 1.24) in men and 1.11 (1.02, 1.20) in women. Thus, even among lean, physically active individuals: (i) weight gain increases hypertension risk; (ii) higher body weight increases the hypertension risk in a dose-dependent manner in the absence of any weight change; and (iii) there is no advantage carried forward to having been previously lean.
C1 Ernest Orlando Lawrence Berkeley Natl Lab, Donner Lab, Div Life Sci, Berkeley, CA USA.
RP Williams, PT (reprint author), Ernest Orlando Lawrence Berkeley Natl Lab, Donner Lab, Div Life Sci, Berkeley, CA USA.
EM ptwilliams@lbl.gov
FU National Heart Lung and Blood Institute [AG032004, HL-072110, DK066738];
Ernest Orlando Lawrence Berkeley Laboratory [DE-AC03-76SF00098]
FX We appreciate the assistance of Kathryn Hoffman and Isabelle La in their
assistance in collecting the data. This study was supported in part by
grants AG032004, HL-072110, and DK066738 from the National Heart Lung
and Blood Institute, and was conducted at the Ernest Orlando Lawrence
Berkeley Laboratory (Department of Energy DE-AC03-76SF00098 to the
University of California).
NR 42
TC 17
Z9 17
U1 1
U2 2
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK STREET, 9TH FLOOR, NEW YORK, NY 10013-1917 USA
SN 1930-7381
J9 OBESITY
JI Obesity
PD NOV
PY 2008
VL 16
IS 11
BP 2541
EP 2548
DI 10.1038/oby.2008.396
PG 8
WC Endocrinology & Metabolism; Nutrition & Dietetics
SC Endocrinology & Metabolism; Nutrition & Dietetics
GA 368OO
UT WOS:000260631700025
PM 18756262
ER
PT J
AU Crutsinger, GM
Reynolds, WN
Classen, AT
Sanders, NJ
AF Crutsinger, Gregory M.
Reynolds, W. Nicholas
Classen, Aimee T.
Sanders, Nathan J.
TI Disparate effects of plant genotypic diversity on foliage and litter
arthropod communities
SO OECOLOGIA
LA English
DT Article
DE community genetics; herbivores; leaf litter; microarthropods; Solidago
altissima
ID PRIMROSE OENOTHERA-BIENNIS; SOLIDAGO-ALTISSIMA; TERRESTRIAL ECOSYSTEMS;
GOLDENRODS SOLIDAGO; DECOMPOSITION; BIODIVERSITY; DYNAMICS; POPULATION;
GENETICS; ORIBATIDA
AB Intraspecific diversity can influence the structure of associated communities, though whether litter-based and foliage-based arthropod communities respond to intraspecific diversity in similar ways remains unclear. In this study, we compared the effects of host-plant genotype and genotypic diversity of the perennial plant, Solidago altissima, on the arthropod community associated with living plant tissue (foliage-based community) and microarthropods associated with leaf litter (litter-based community). We found that variation among host-plant genotypes had strong effects on the diversity and composition of foliage-based arthropods, but only weak effects on litter-based microarthropods. Furthermore, host-plant genotypic diversity was positively related to the abundance and diversity of foliage-based arthropods, and within the herbivore and predator trophic levels. In contrast, there were minimal effects of plant genotypic diversity on litter-based microarthropods in any trophic level. Our study illustrates that incorporating communities associated with living foliage and senesced litter into studies of community genetics can lead to very different conclusions about the importance of intraspecific diversity than when only foliage-based community responses are considered in isolation.
C1 [Crutsinger, Gregory M.; Classen, Aimee T.; Sanders, Nathan J.] Univ Tennessee, Dept Ecol & Evolutionary Biol, Knoxville, TN 37996 USA.
[Reynolds, W. Nicholas] Univ Tennessee, Dept Entomol & Plant Pathol, Knoxville, TN 37996 USA.
[Classen, Aimee T.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Crutsinger, GM (reprint author), Univ Tennessee, Dept Ecol & Evolutionary Biol, 569 Dabney Hall, Knoxville, TN 37996 USA.
EM gcrutsin@utk.edu
RI Sanders, Nathan/A-6945-2009; Classen, Aimee/C-4035-2008
OI Sanders, Nathan/0000-0001-6220-6731; Classen, Aimee/0000-0002-6741-3470
FU EPA STAR; NSF Graduate Research; Department of Ecology and Evolutionary
Biology at the University of Tennessee; Oak Ridge National Laboratory
[DE-AC05-00OR22725]; US Department of Energy [DE-FG02-02ER63366]
FX We thank K. Crawford, M. Genung, M. Habenicht, J. Ledford, and L.
Zachmann for help with Weld and laboratory work. E. Bernard assisted
with microarthropod identification. P. Kardol and T. Sackett provided
helpful comments on the manuscript. G. M. C. was supported by an EPA
STAR, NSF Graduate Research Fellowship, and funds from the Department of
Ecology and Evolutionary Biology at the University of Tennessee. The
Laboratory Directed Research and Development Program of Oak Ridge
National Laboratory, managed by UT-Battelle, LLC, for the US Department
of Energy under contract no. DE-AC05-00OR22725 and the Office of Science
(Biological and Environmental Research), US Department of Energy, grant
no. DE-FG02-02ER63366 supported A. T. C. and some of the work on this
project.
NR 56
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Z9 37
U1 0
U2 29
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0029-8549
J9 OECOLOGIA
JI Oecologia
PD NOV
PY 2008
VL 158
IS 1
BP 65
EP 75
DI 10.1007/s00442-008-1130-y
PG 11
WC Ecology
SC Environmental Sciences & Ecology
GA 357AX
UT WOS:000259819800007
PM 18766383
ER
PT J
AU Fitzsimons, MS
Miller, RM
Jastrow, JD
AF Fitzsimons, Michael S.
Miller, R. Michael
Jastrow, Julie D.
TI Scale-dependent niche axes of arbuscular mycorrhizal fungi
SO OECOLOGIA
LA English
DT Article
DE succession; tallgrass prairie; multidimensional scaling; mantel tests;
disturbance
ID PLANT COMMUNITY STRUCTURE; TALLGRASS PRAIRIE; COMPETITIVE INTERACTIONS;
ANDROPOGON-GERARDII; SPECIES-DIVERSITY; SOIL; ECOSYSTEM; ECOLOGY;
BIODIVERSITY; COEXISTENCE
AB Arbuscular mycorrhizal fungi (AMF) are mutualistic with most species of plants and are known to influence plant community diversity and composition. To better understand natural plant communities and the ecological processes they control it is important to understand what determines the distribution and diversity of AMF. We tested three putative niche axes: plant species composition, disturbance history, and soil chemistry against AMF species composition to determine which axis correlated most strongly with a changing AMF community. Due to a scale dependency we were not able to absolutely rank their importance, but we did find that each correlated significantly with AMF community change at our site. Among soil properties, pH and NO(3) were found to be especially good predictors of AMF community change. In a similar analysis of the plant community we found that time since disturbance had by far the largest impact on community composition.
C1 [Fitzsimons, Michael S.] Univ Chicago, Dept Ecol & Evolut, Chicago, IL 60637 USA.
[Fitzsimons, Michael S.; Miller, R. Michael; Jastrow, Julie D.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Miller, R. Michael] Univ Chicago, Comm Evolutionary Biol, Chicago, IL 60637 USA.
RP Fitzsimons, MS (reprint author), Univ Chicago, Dept Ecol & Evolut, 1101 E 57th St, Chicago, IL 60637 USA.
EM fitz@uchicago.edu; rmmiller@anl.gov; jdjastrow@anl.gov
FU United States Department of Energy [W-31-109-Eng-38]
FX We would like to thank the Fermi National Environmental Research Park
for allowing us to sample the prairie restorations and A. C. McGraw for
the spore identification. The research was supported by the United
States Department of Energy, Office of Science, Office of Biological and
Environmental Research, and Climate Change Research Division under
contract W-31-109-Eng-38. The experiments discussed within this
manuscript comply with the current laws of the United States of America
and the state of Illinois.
NR 65
TC 37
Z9 40
U1 2
U2 41
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0029-8549
J9 OECOLOGIA
JI Oecologia
PD NOV
PY 2008
VL 158
IS 1
BP 117
EP 127
DI 10.1007/s00442-008-1117-8
PG 11
WC Ecology
SC Environmental Sciences & Ecology
GA 357AX
UT WOS:000259819800012
PM 18690479
ER
PT J
AU Natali, SM
Sanudo-Wilhelmy, SA
Norby, RJ
Zhang, H
Finzi, AC
Lerdau, MT
AF Natali, Susan M.
Sanudo-Wilhelmy, Sergio A.
Norby, Richard J.
Zhang, Hong
Finzi, Adrien C.
Lerdau, Manuel T.
TI Increased mercury in forest soils under elevated carbon dioxide
SO OECOLOGIA
LA English
DT Article
DE Global change; Soil organic matter; Hg deposition; Throughfall; Free-air
carbon dioxide enrichment
ID ATMOSPHERIC CO2; THROUGHFALL; ENRICHMENT; CANOPY; DEPOSITION; AIR;
ACIDIFICATION; ACCUMULATION; VEGETATION; WATER
AB Fossil fuel combustion is the primary anthropogenic source of both CO(2) and Hg to the atmosphere. On a global scale, most Hg that enters ecosystems is derived from atmospheric Hg that deposits onto the land surface. Increasing concentrations of atmospheric CO(2) may affect Hg deposition to terrestrial systems and storage in soils through CO(2)-mediated changes in plant and soil properties. We show, using free-air CO(2) enrichment (FACE) experiments, that soil Hg concentrations are almost 30% greater under elevated atmospheric CO(2) in two temperate forests. There were no direct CO(2) effects, however, on litterfall, throughfall or stemflow Hg inputs. Soil Hg was positively correlated with percent soil organic matter (SOM), suggesting that CO(2)-mediated changes in SOM have influenced soil Hg concentrations. Through its impacts on SOM, elevated atmospheric CO(2) may increase the Hg storage capacity of soils and modulate the movement of Hg through the biosphere. Such effects of rising CO(2), ones that transcend the typically studied effects on C and nutrient cycling, are an important next phase for research on global environmental change.
C1 [Natali, Susan M.] Univ Florida, Dept Bot, Gainesville, FL 32611 USA.
[Sanudo-Wilhelmy, Sergio A.] Univ So Calif, Los Angeles, CA 90089 USA.
[Norby, Richard J.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
[Zhang, Hong] Tennessee Technol Univ, Dept Chem, Cookeville, TN 38505 USA.
[Finzi, Adrien C.] Boston Univ, Dept Biol, Boston, MA 02215 USA.
[Lerdau, Manuel T.] Univ Virginia, Blandy Expt Farm, Charlottesville, VA 22904 USA.
[Lerdau, Manuel T.] Univ Virginia, Dept Environm Sci, Charlottesville, VA 22904 USA.
RP Natali, SM (reprint author), Univ Florida, Dept Bot, Gainesville, FL 32611 USA.
EM natali@ufl.edu
RI Norby, Richard/C-1773-2012; Lerdau, Manuel/E-7320-2011; Finzi,
Adrien/A-7017-2016
OI Norby, Richard/0000-0002-0238-9828; Lerdau, Manuel/0000-0003-1864-0834;
Finzi, Adrien/0000-0003-2220-4533
FU US Department of Energy, Office of Science-Biological and Environmental
Research; National Science Foundation; Department of Energy
FX We thank D. Richter for soil samples, E. A. Leger and F. J. Rohlf for
statistical advice, C. Iversen, R. Oren and the FACE staff for Weld
support, J. Lichter for conversations and data on pre-treatment soils,
R. K. Kolka for advice on stemflow collectors, S. Lindberg and N. Bloom
for throughfall sampling advice, J. Varekamp for use of his DMA-80, W.
Schlesinger for advice during manuscript preparation, and H. Heilmeier
and two anonymous reviewers for comments on this manuscript. This work
was supported by the US Department of Energy, Office of
Science-Biological and Environmental Research, and fellowships from the
National Science Foundation (S. M. N.) and Department of Energy (S. M.
N.).
NR 46
TC 8
Z9 8
U1 0
U2 13
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0029-8549
J9 OECOLOGIA
JI Oecologia
PD NOV
PY 2008
VL 158
IS 2
BP 343
EP 354
DI 10.1007/s00442-008-1135-6
PG 12
WC Ecology
SC Environmental Sciences & Ecology
GA 363UZ
UT WOS:000260293700015
PM 18769943
ER
PT J
AU Long, EF
Vaidya, NK
Brandeau, ML
AF Long, Elisa F.
Vaidya, Naveen K.
Brandeau, Margaret L.
TI Controlling Co-Epidemics: Analysis of HIV and Tuberculosis Infection
Dynamics
SO OPERATIONS RESEARCH
LA English
DT Article
ID UNITED-STATES; INDIA; IMPACT; THERAPY; MODELS; TRANSMISSION;
POPULATIONS; PREVENTION; HIV/AIDS; DRIVEN
AB A co-epidemic arises when the spread of one infectious disease stimulates the spread of another infectious disease. Recently, this has happened with human immunodeficiency virus (HIV) and tuberculosis (TB). We develop two variants of a coepidemic model of two diseases. We calculate the basic reproduction number (R(0)), the disease-free equilibrium, and the quasi-disease-free equilibria, which we de. ne as the existence of one disease along with the complete eradication of the other disease, and the co-infection equilibria for specific conditions. We determine stability criteria for the disease-free and quasi-disease-free equilibria. We present an illustrative numerical analysis of the HIV-TB co-epidemics in India that we use to explore the effects of hypothetical prevention and treatment scenarios. Our numerical analysis demonstrates that exclusively treating HIV or TB may reduce the targeted epidemic, but can subsequently exacerbate the other epidemic. Our analyses suggest that coordinated treatment efforts that include highly active antiretroviral therapy for HIV, latent TB prophylaxis, and active TB treatment may be necessary to slow the HIV-TB co-epidemic. However, treatment alone may not be sufficient to eradicate both diseases. Increased disease prevention efforts (for example, those that promote condom use) may also be needed to extinguish this co-epidemic. Our simple model of two synergistic infectious disease epidemics illustrates the importance of including the effects of each disease on the transmission and progression of the other disease.
C1 [Long, Elisa F.] Yale Univ, Sch Management, New Haven, CT 06520 USA.
[Vaidya, Naveen K.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Brandeau, Margaret L.] Stanford Univ, Dept Management Sci & Engn, Stanford, CA 94305 USA.
RP Long, EF (reprint author), Yale Univ, Sch Management, New Haven, CT 06520 USA.
EM elisa.long@yale.edu; nvaidya@nanl.gov; brandeau@stanford.edu
FU National Institute on Drug Abuse [R-01-DA-15612]; Institute for
Operations Research and the Management Sciences ( INFORMS); Natural
Science and Engineering Research Council (NSERC) of Canada; Mathematics
for Information Technology and Complex System (MITACS) of Canada
FX This work was supported by a grant (R-01-DA-15612) from the National
Institute on Drug Abuse; the Seth Bonder Scholarship for Applied
Operations Research in Health Services, sponsored by the Institute for
Operations Research and the Management Sciences ( INFORMS); the Natural
Science and Engineering Research Council (NSERC) of Canada; and the
Mathematics for Information Technology and Complex System (MITACS) of
Canada.
NR 41
TC 16
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U1 2
U2 7
PU INFORMS
PI HANOVER
PA 7240 PARKWAY DR, STE 310, HANOVER, MD 21076-1344 USA
SN 0030-364X
J9 OPER RES
JI Oper. Res.
PD NOV-DEC
PY 2008
VL 56
IS 6
BP 1366
EP 1381
DI 10.1287/opre.1080.0571
PG 16
WC Management; Operations Research & Management Science
SC Business & Economics; Operations Research & Management Science
GA 410GK
UT WOS:000263565300004
PM 19412348
ER
PT J
AU Johnson, RP
AF Johnson, Randall P.
TI Spike suppression and longitudinal mode selection in a 1.319 mu m Nd :
YAG laser by high-efficiency intracavity frequency doubling
SO OPTICS AND LASER TECHNOLOGY
LA English
DT Article
DE Nd : YAG; frequency doubling; mode selection
AB We describe a flashlamp pumped 1.319 mu m Nd:YAG ring laser in which a high-efficiency intracavity frequency doubler is used as a nonlinear output coupler, virtually eliminating all spiking behavior and providing longitudinal mode selection as well. A single frequency, long pulse (> 50 mu s) output at 660 nm with about 20 W peak power is produced, suitable as a source for visar and other applications where long coherent pulses at relatively high power are required. Experimental results and theoretical analyses are given. (C) 2008 Elsevier Ltd. All rights reserved.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Johnson, RP (reprint author), Los Alamos Natl Lab, P-24,Mail Stop E526,POB 1663, Los Alamos, NM 87545 USA.
EM rpjohnson@lanl.gov
NR 8
TC 2
Z9 2
U1 2
U2 2
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0030-3992
J9 OPT LASER TECHNOL
JI Opt. Laser Technol.
PD NOV
PY 2008
VL 40
IS 8
BP 1078
EP 1081
DI 10.1016/j.optlastec.2008.02.001
PG 4
WC Optics; Physics, Applied
SC Optics; Physics
GA 332BI
UT WOS:000258056300015
ER
PT J
AU Phuoc, TX
Howard, BH
Martello, DV
Soong, Y
Chyu, MK
AF Phuoc, Tran X.
Howard, Bret. H.
Martello, Donald V.
Soong, Yee
Chyu, Minking K.
TI Synthesis of Mg(OH)(2), MgO, and Mg nanoparticles using laser ablation
of magnesium in water and solvents
SO OPTICS AND LASERS IN ENGINEERING
LA English
DT Article
DE laser ablation in liquid; magnesium; magnesium oxides
ID OPTICAL-PROPERTIES; LIQUIDS; COLLOIDS; COBALT; SIZE
AB Laser ablation of magnesium in deionized water (DW), solutions of DW and sodium dodecyl sulfate (SDS) with different concentrations, acetone and 2-propanol has been conducted. The results showed that ablation in acetone and 2-propanol yielded MgO and Mg nanocrystallites as isolated particles and agglomerated chains probably intermixed with organic residues resulting from the alteration/decomposition of the solvents under the high-energy conditions. Brucite-like Mg(OH)2 particles were mainly produced by laser ablation of Mg in either DW or DW-SDS solutions. Ablation in DW yielded particles of fiber-like shapes having a diameter of about 5-10nm and length-as long as 150 nm. Materials produced in DW-SDS solutions were composed of various size and shape particles. Some had rough surfaces with irregular shapes. Small particles were about 20-30 nm and larger particles were about 120 nm. Particles with rod-like, triangular, and plate-like shapes were also observed. Published by Elsevier Ltd.
C1 [Phuoc, Tran X.; Howard, Bret. H.; Martello, Donald V.; Soong, Yee] Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
[Chyu, Minking K.] Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15261 USA.
RP Phuoc, TX (reprint author), Natl Energy Technol Lab, POB 10940,MS 84-340, Pittsburgh, PA 15236 USA.
EM tran@netl.doe.gov
NR 23
TC 45
Z9 45
U1 2
U2 14
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0143-8166
J9 OPT LASER ENG
JI Opt. Lasers Eng.
PD NOV
PY 2008
VL 46
IS 11
BP 829
EP 834
DI 10.1016/j.optlaseng.2008.05.018
PG 6
WC Optics
SC Optics
GA 357NK
UT WOS:000259852300007
ER
PT J
AU Huo, QK
Yuasa, T
Akatsuka, T
Takeda, T
Wu, J
Thet-Thet-Lwin
Hyodo, K
Dilmanian, FA
AF Huo, Qingkai
Yuasa, Tetsuya
Akatsuka, Takao
Takeda, Tohoru
Wu, Jin
Thet-Thet-Lwin
Hyodo, Kazuyuki
Dilmanian, F. Avraham
TI Sheet-beam geometry for in vivo fluorescent x-ray computed tomography:
proof-of-concept experiment in molecular imaging
SO OPTICS LETTERS
LA English
DT Article
ID SYNCHROTRON-RADIATION
AB We propose a fluorescent x-ray computed tomography method using an array of detectors with an incident sheet beam, aimed at providing molecular imaging with high sensitivity and good spatial resolution. In this study, we prove the feasibility of this concept and investigate its imaging properties, including spatial and contrast resolutions and quantitativeness, by imaging an acrylic phantom and a normal mouse brain using a preliminary imaging system with monochromatic synchrotron x rays. (C) 2008 Optical Society of America
C1 [Huo, Qingkai; Yuasa, Tetsuya; Akatsuka, Takao] Yamagata Univ, Yamagata 9928510, Japan.
[Takeda, Tohoru; Wu, Jin; Thet-Thet-Lwin] Univ Tsukuba, Tsukuba, Ibaraki 3058575, Japan.
[Hyodo, Kazuyuki] KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan.
[Dilmanian, F. Avraham] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Yuasa, T (reprint author), Yamagata Univ, Yamagata 9928510, Japan.
EM yuasa@yz.yamagata-u.ac.jp
RI Yuasa, Tetsuya/F-5006-2013
FU Japanese Ministry of Education, Science and Culture [09780789, 20500385,
19390313]; KEK [2007G643]
FX This research was partially supported by a Grant-In-Aid for Scientific
Research (09780789, 20500385, 19390313) from the Japanese Ministry of
Education, Science and Culture, and performed under the auspices of KEK
(2007G643).
NR 10
TC 23
Z9 23
U1 0
U2 1
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD NOV 1
PY 2008
VL 33
IS 21
BP 2494
EP 2496
PG 3
WC Optics
SC Optics
GA 379CQ
UT WOS:000261373000027
PM 18978898
ER
PT J
AU Schiffbauer, JD
Yanes, Y
Tyler, CL
Kowalewski, M
Leighton, LR
AF Schiffbauer, James D.
Yanes, Yurena
Tyler, Carrie L.
Kowalewski, Michal
Leighton, Lindsey R.
TI THE MICROSTRUCTURAL RECORD OF PREDATION: A NEW APPROACH FOR IDENTIFYING
PREDATORY DRILL HOLES
SO PALAIOS
LA English
DT Article
ID FOSSIL RECORD; NATICID GASTROPODS; SHELL PENETRATION; MYTILUS-EDULIS;
MURICIDAE; PREY; BRACHIOPOD; BOREHOLES; DISSOLUTION; UROSALPINX
AB Drill holes in prey skeletons are the most common source of data for quantifying predator-prey interactions in the fossil record. To be useful, however, such drill holes need to be identified correctly. Field emission scanning electron microscopy (FE-SEM) and environmental scanning electron microscopy (ESEM) were applied to describe and quantify microstructural characteristics of drill holes. Various specimens, including modern limpets and mussels drilled by muricid snails in laboratory experiments, subfossil limpets collected from a tidal flat (San juan Island, Washington state, USA), and various Miocene bivalves collected from multiple European sites, were examined for microstructural features. The microstructures observed are interpreted here as Radulichnus-like micro-rasping marks, or predatory microtraces, made by the radula of drilling gastropod predators. The mean adjacent spacing of these microtraces is notably denser than the spacing of muricid radular teeth determined by measurements taken from the literature. Because the radular marks typically overlie or crosscut each other, the denser spacing of predatory microtraces likely reflects superimposition of scratches from repeated passes of the radula. One incomplete drill hole showed a clear, chemically aided drilling dissolution signature around its outer margin, while a number of other specimens showed similar, but ambiguous, traces of dissolution. The range of organisms examined illustrates the utility of scanning electron microscopy (SEM) imaging for identifying micro-rasping marks associated with predatory drill holes in both modern and fossil specimens. These distinct microtraces offer promise for augmenting our ability to identify drill holes in the fossil record and to distinguish them from holes produced by non-predatory means.
C1 [Schiffbauer, James D.; Tyler, Carrie L.; Kowalewski, Michal] Virginia Polytech Inst & State Univ, Dept Geosci, Blacksburg, VA 24061 USA.
[Yanes, Yurena] Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA.
[Leighton, Lindsey R.] Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB T6G 2E3, Canada.
RP Schiffbauer, JD (reprint author), Virginia Polytech Inst & State Univ, Dept Geosci, 4044 Derring Hall, Blacksburg, VA 24061 USA.
EM jdschiff@vt.edu
RI Kowalewski, Michal/B-4263-2008; Yanes, Yurena/F-3218-2010
OI Kowalewski, Michal/0000-0002-8575-4711;
FU National Science Foundation [OCE-0602375]
FX The experimental portions of this study were conducted at the Friday
Harbor Laboratories during a Predator-Prey Interactions summer course.
We would like to thank the FHL faculty and staff for providing funding,
facilities, and logistic and intellectual support. All EM analyses were
conducted at the Virginia Tech Institute for Critical Technology and
Applied Science Nanoscale Characterization and Fabrication Laboratory
(ICTAS-NCFL). The final stages of the study were partly supported by
National Science Foundation grant (OCE-0602375). We thank J.W. Huntley
(University of Kentucky) for his generous help during the FHL Summer
course and for insights on the manuscript; S.R.F McCartney and J.
McIntosh (ICTAS-NCFL) for FE-SEM and ESEM technical assistance-, and
T.A. Dexter, P.J. Voice, A.F Wallace, and S. Xiao (Virginia Tech) for
constructive comments on earlier drafts of this report. We also thank
G.S. Herbert (University of South Florida) for valuable discussions, as
well as K. Parsons-Hubbard (Oberlin College), E.M. Harper (Cambridge
University), two anonymous reviewers, and an anonymous associate editor
for constructive reviews, suggestions, and comments that greatly
improved the quality of this manuscript.
NR 38
TC 14
Z9 14
U1 0
U2 10
PU SEPM-SOC SEDIMENTARY GEOLOGY
PI TULSA
PA 6128 EAST 38TH ST, STE 308, TULSA, OK 74135-5814 USA
SN 0883-1351
J9 PALAIOS
JI Palaios
PD NOV-DEC
PY 2008
VL 23
IS 11-12
BP 810
EP 820
DI 10.2110/palo.2008.p08-045r
PG 11
WC Geology; Paleontology
SC Geology; Paleontology
GA 388SH
UT WOS:000262039000009
ER
PT J
AU Alam, SR
Agarwal, PK
Vetter, JS
AF Alam, Sadaf R.
Agarwal, Pratul K.
Vetter, Jeffrey S.
TI Performance characteristics of biomolecular simulations on high-end
systems with multi-core processors
SO PARALLEL COMPUTING
LA English
DT Article; Proceedings Paper
CT 6th IEEE International Workshop on High Performance Computational
Biology
CY MAR 26, 2007
CL Long Beach, CA
SP IEEE
DE Multicore processors; Performance evaluation; Workload characterization;
Molecular modeling; Massively parallel systems
ID MOLECULAR-DYNAMICS; PROTEIN DYNAMICS; CYCLOPHILIN-A; ISOMERIZATION;
ENZYMES
AB Biological processes occurring inside cell involve multiple scales of time and length; many popular theoretical and computational multi-scale techniques utilize biomolecular simulations based on molecular dynamics. Till recently, the computing power required for simulating the relevant scales was even beyond the reach of fastest supercomputers. The availability of petaFLOPS-scale computing power in near future holds great promise. Unfortunately, the biosimulations software technology has not kept up with the changes in hardware. In particular, with the introduction of multi-core processing technologies in systems with tens of thousands of processing cores, it is unclear whether the existing biomolecular simulation frameworks will be able to scale and to utilize these resources effectively. While the multi-core processing systems provide higher processing capabilities, their memory and network subsystems are posing new challenges to application and system software developers. In this study, we attempt to characterize computation, communication and memory efficiencies of biomolecular simulations on Teraflops-scale Cray XT systems, which contain dual-core Opteron processors. We identify that the application efficiencies using the multi-core processors reduce with the increase of the simulated system size. Further, we measure the communication overhead of using both cores in the processor simultaneously and identify that: the slowdown in the MPI communication performance can significantly lower the achievable performance in the dual-core execution mode. We conclude that not only the biomolecular simulations need to be aware of the underlying multicore hardware in order to achieve maximum performance but also the system software needs to provide processor and memory placement features in the high-end systems. Our results on stand-alone multi-core AMD and Intel systems confirm that combinations of processor and memory affinity schemes cause significant performance variations for our target test cases. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Alam, Sadaf R.; Agarwal, Pratul K.; Vetter, Jeffrey S.] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
RP Alam, SR (reprint author), Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
EM alamsr@ornl.gov; agarwalpk@ornl.gov; vetter@ornl.gov
NR 23
TC 4
Z9 5
U1 0
U2 9
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-8191
J9 PARALLEL COMPUT
JI Parallel Comput.
PD NOV
PY 2008
VL 34
IS 11
BP 640
EP 651
DI 10.1016/j.parco.2008.05.003
PG 12
WC Computer Science, Theory & Methods
SC Computer Science
GA 379CB
UT WOS:000261371300004
ER
PT J
AU Biswas, R
Christensen, C
Muehlmeier, J
Tuttle, G
Ho, KM
AF Biswas, Rana
Christensen, C.
Muehlmeier, J.
Tuttle, G.
Ho, K. -M.
TI Waveguide circuits in three-dimensional photonic crystals
SO PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
LA English
DT Article
DE 3-D photonic bandgap crystal; Waveguide bend
ID BENDS; DESIGN
AB Waveguide circuits in three-dimensional photonic crystals with complete photonic band gaps are simulated with finite difference time domain (FDTD) simulations, and compared with measurements on microwave scale photonic crystals. The transmission through waveguide bends critically depends on the photonic crystal architecture in the bend region. We have found experimentally and theoretically, a new waveguide bend configuration consisting of overlapping rods in the bend region, that performs better than the simple waveguide bend of terminated rods, especially in the higher frequency portion of the band. Efficient beam splitters with this junction geometry are also simulated. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Biswas, Rana; Christensen, C.; Muehlmeier, J.; Tuttle, G.; Ho, K. -M.] Iowa State Univ, Microelect Res Ctr, Dept Phys & Astron, Ames Lab, Ames, IA 50011 USA.
RP Biswas, R (reprint author), Iowa State Univ, Microelect Res Ctr, Dept Phys & Astron, Ames Lab, Ames, IA 50011 USA.
EM biswasr@iastate.edu
FU Department of Energy, Division of Basic Energy Sciences
[DE-AC02-07CH11358]
FX We thank Mihalas Sigalas for helpful suggestions. Work at the Ames
Laboratory was supported by the Department of Energy, Division of Basic
Energy Sciences, under Contract No. DE-AC02-07CH11358.
NR 26
TC 6
Z9 8
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1569-4410
J9 PHOTONIC NANOSTRUCT
JI Photonics Nanostruct.
PD NOV
PY 2008
VL 6
IS 2
BP 134
EP 141
DI 10.1016/j.photonics.2008.03.002
PG 8
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Optics; Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Optics; Physics
GA 372VF
UT WOS:000260929400002
ER
PT J
AU Farfan, GB
Rammohan, R
Su, MF
El-Kady, I
Taha, MMR
AF Farfan, G. B.
Rammohan, R.
Su, M. F.
El-Kady, I.
Taha, M. M. Reda
TI Prediction of photonic crystal emitter efficiency using an optimized
fuzzy learning approach
SO PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
LA English
DT Article
DE Photonic crystal; Emitter efficiency; Power efficiency;
Thermo-photovoltaics (TPV); Fuzzy set Theory
ID DIFFRACTION; FORMULATION; GRATINGS; LIGHT
AB Photonic crystals (PC) have attracted much attention over the last decade for their unique ability to control light propagation. Researchers suggested the use of metallic photonic crystal with network topology as high efficiency thermal emitters. A necessary precursor to the deployment of such crystals in practical systems is fast accurate prediction of the emission characteristics and efficiency from a photonic lattice. Conventional models that simulate the photonic response of PC are computationally expensive and can take up to a few hours on several parallel processors to realize the emitter efficiency for a given PC structure. Therefore, a practical design process with trial and error cannot be done in a reasonable amount of time.
In this article we suggest the use of a fuzzy learning approach to establish a model that can be used to predict emitter efficiency from such systems. The widely studied metallic PC Lincoln log structure is used as a case study. We show that the proposed method can estimate the efficiency of any PC Lincoln log structure much faster than any existing method and is by no means bound to this specific geometry. The case study presented here was chosen only because of recent high interest in it and the abundance of literature data on the example structure. The learning process using Fuzzy set Theory is explained. A multi-objective optimization method to enhance the fuzzy learning process is also outlined. An exemplar case showing the ability of the proposed model to predict the emitter efficiency of a tungsten PC with a bandgap at (10-11.5 mu m) is illustrated. We show that once the fuzzy learning is performed, the proposed method can predict the emitter efficiency with 95% accuracy without the need for any expensive computations. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Farfan, G. B.; Su, M. F.; El-Kady, I.; Taha, M. M. Reda] Univ New Mexico, Dept Elect & Comp Engn, Albuquerque, NM 87131 USA.
[Rammohan, R.] Univ New Mexico, Dept Comp Sci, Albuquerque, NM 87131 USA.
[El-Kady, I.] Sandia Natl Labs, Dept Photon Microsyst Technol, Albuquerque, NM 87185 USA.
[Taha, M. M. Reda] Univ New Mexico, Dept Civil Engn, Albuquerque, NM 87131 USA.
RP El-Kady, I (reprint author), Univ New Mexico, Dept Elect & Comp Engn, Albuquerque, NM 87131 USA.
EM ielkady@sandia.gov
RI El-Kady, Ihab/D-2886-2013
OI El-Kady, Ihab/0000-0001-7417-9814
FU Sandia National Laboratories (SNL); U.S. Department of Energy's National
Nuclear Security Administration [DE-AC04-94AL85000]; U.S. Department of
Energy; Office of Science; Office of Basic Energy Sciences
[W-31-109-Eng-38]
FX This work is supported by Sandia National Laboratories (SNL). We greatly
appreciate this support. Sandia National Laboratories, a multiprogram
laboratory operated by Sandia Corporation, a Lockheed Martin Company,
for the U.S. Department of Energy's National Nuclear Security
Administration under contract DE-AC04-94AL85000. Use of the Center for
Nanoscale Materials was supported by the U.S. Department of Energy,
Office of Science, Office of Basic Energy Sciences, under Contract No.
W-31-109-Eng-38.
NR 35
TC 2
Z9 2
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1569-4410
EI 1569-4429
J9 PHOTONIC NANOSTRUCT
JI Photonics Nanostruct.
PD NOV
PY 2008
VL 6
IS 2
BP 154
EP 166
DI 10.1016/j.photonics.2008.07.002
PG 13
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Optics; Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Optics; Physics
GA 372VF
UT WOS:000260929400005
ER
PT J
AU Menshutin, AY
Shchur, LN
Vinokour, VM
AF Menshutin, Anton Yu.
Shchur, Lev N.
Vinokour, Valery M.
TI Finite size effect of harmonic measure estimation in a DLA model:
Variable size of probe particles
SO PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
LA English
DT Article
DE DLA; fractal growth; harmonic measure; fractal dimension
ID DIFFUSION-LIMITED-AGGREGATION; BROWNIAN INTERSECTION EXPONENTS; KINETIC
CRITICAL PHENOMENON; PLANE EXPONENTS; LATTICE; GROWTH; CLUSTERS; VALUES
AB A finite size effect in the probing of the harmonic measure in simulation of diffusion-limited aggregation (DLA) growth is investigated. We introduce a variable size of probe particles, to estimate harmonic measure and extract the fractal dimension of DLA clusters taking two limits, of vanishingly small probe particle size and of infinitely large size of a DLA cluster. We generate 1000 DLA clusters consisting of 50 million particles each, using an off-lattice killing-free algorithm developed in the early work. The introduced method leads to unprecedented accuracy in the estimation of the fractal dimension. We discuss the variation of the probability distribution function with the size of probing particles. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Menshutin, Anton Yu.; Shchur, Lev N.] LD Landau Theoret Phys Inst, Chernogolovka 142432, Russia.
[Shchur, Lev N.; Vinokour, Valery M.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Menshutin, AY (reprint author), LD Landau Theoret Phys Inst, Chernogolovka 142432, Russia.
EM may@itp.ac.ru
FU US Department of Energy Office of Science [DE-AC02-06CH11357]; Landau
Scholarship Committee
FX This work was supported by the US Department of Energy Office of Science
through contract No. DE-AC02-06CH11357 and the Program. A.Yu.M. thanks
Prof. G. Eilenberger and Landau Scholarship Committee for support and
Prof. H. Muller-Krumbhaar and Prof. E. Brener for the kind hospitality
and useful discussions.
NR 28
TC 5
Z9 5
U1 2
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-4371
J9 PHYSICA A
JI Physica A
PD NOV 1
PY 2008
VL 387
IS 25
BP 6299
EP 6309
DI 10.1016/j.physa.2008.07.015
PG 11
WC Physics, Multidisciplinary
SC Physics
GA 356RF
UT WOS:000259794600007
ER
PT J
AU Ho, PJ
Santra, R
AF Ho, Phay J.
Santra, Robin
TI Theory of x-ray diffraction from laser-aligned symmetric-top molecules
SO PHYSICAL REVIEW A
LA English
DT Article
ID ULTRAFAST ELECTRON-DIFFRACTION; PENDULAR STATES; PHASE RETRIEVAL;
FIELDS; ALIGNMENT; CRYSTALLOGRAPHY; SCATTERING; ORBITALS; PULSES; ALLOW
AB We present a theory of x-ray diffraction from an ensemble of symmetric-top molecules aligned by a short intense optical laser pulse at finite rotational temperature. Employing quantum electrodynamics, we describe the x-ray-molecule interaction as an electronically elastic one-photon scattering process. We treat the short x-ray pulse as a multimode radiation field and examine the effect of its coherence properties. In the practically important case that the x-ray pulse is quasimonochromatic and its coherence time is much shorter than the time scale of molecular rotational dynamics in the laser field, there is a simple connection between the rotational wave-packet dynamics and the diffraction pattern obtained. Our theory thus opens up a new perspective for quantum molecular imaging using x-ray radiation. An illustrative application to Br-2 is presented.
C1 [Ho, Phay J.; Santra, Robin] Argonne Natl Lab, Argonne, IL 60439 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.
RI Santra, Robin/E-8332-2014
OI Santra, Robin/0000-0002-1442-9815
NR 53
TC 13
Z9 13
U1 1
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD NOV
PY 2008
VL 78
IS 5
AR 053409
DI 10.1103/PhysRevA.78.053409
PG 14
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 376XF
UT WOS:000261215600111
ER
PT J
AU Khodas, M
Kamenev, A
Glazman, LI
AF Khodas, M.
Kamenev, A.
Glazman, L. I.
TI Photosolitonic effect
SO PHYSICAL REVIEW A
LA English
DT Article
ID BOSE-EINSTEIN CONDENSATE; DARK SOLITONS; BRAGG SPECTROSCOPY; SCATTERING;
GAS; SPECTRUM
AB We show that dark solitons in one-dimensional Bose liquids may be created by absorption of a single quanta of an external ac field, in a close analogy with the Einstein's photoelectric effect. Similarly to the von Lenard's experiment with photoexcited electrons, the external field's photon energy h omega should exceed a certain threshold. In our case the latter is given by the soliton energy epsilon(s)(hq) with the momentum hq, where q is photon's wave number. We find the probability of soliton creation to have a power-law dependence on the frequency detuning omega-epsilon(s)/h. This dependence is a signature of the quantum nature of the absorption process and the orthogonality catastrophe phenomenon associated with it.
C1 [Khodas, M.] Univ Minnesota, William I Fine Theoret Phys Inst, Minneapolis, MN 55455 USA.
[Khodas, M.; Kamenev, A.] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA.
[Glazman, L. I.] Yale Univ, Dept Phys, New Haven, CT 06520 USA.
RP Khodas, M (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
FU DOE [DEFG02-08ER46482]; A. P. Sloan foundation
FX We thank A. Abanov, J.- S. Caux, D. Gangardt, D. Gutman, V. Gurarie, and
A. Imambekov for numerous discussions. This research is supported by DOE
Grant No. DEFG02-08ER46482 and A. P. Sloan foundation.
NR 41
TC 14
Z9 14
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD NOV
PY 2008
VL 78
IS 5
AR 053630
DI 10.1103/PhysRevA.78.053630
PG 8
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 376XF
UT WOS:000261215600147
ER
PT J
AU Ludlow, JA
Loch, SD
Pindzola, MS
Ballance, CP
Griffin, DC
Bannister, ME
Fogle, M
AF Ludlow, J. A.
Loch, S. D.
Pindzola, M. S.
Ballance, C. P.
Griffin, D. C.
Bannister, M. E.
Fogle, M.
TI Electron-impact ionization of C(+) in both ground and metastable states
SO PHYSICAL REVIEW A
LA English
DT Article
ID COLLISIONAL-RADIATIVE MODEL; R-MATRIX; ISONUCLEAR SEQUENCE; ELEMENTS
HYDROGEN; LIGHT-ELEMENTS; IONS; EXCITATION
AB Electron-impact ionization cross sections are calculated for the ground and metastable states of C(+). Comparisons between perturbative distorted-wave and nonperturbative time-dependent close-coupling calculations find reductions in the peak direct ionization cross sections due to electron coupling effects of approximately 5% for ground state C(+) and approximately 15% for metastable state C(+). Fairly small excitation-autoionization contributions are found for ground state C(+), while larger excitation-autoionization contributions are found for metastable state C(+). Comparisons between perturbative distorted-wave and nonperturbative R-matrix with pseudostates calculations find reductions in the peak total ionization cross sections due to electron coupling effects of approximately 15-20 % for ground state C(+) and approximately 25-35 % for metastable state C(+). Finally, comparisons between theory and experiment find that present and previous C(+) crossed-beam measurements are in excellent agreement with ground state nonperturbative R-matrix with pseudostates calculations for total ionization cross sections. Combined with previous non-perturbative calculations for C, C(2+), and C(3+), accurate ionization cross sections and rate coefficients are now available for the ground and metastable states of all carbon ion stages.
C1 [Ludlow, J. A.; Loch, S. D.; Pindzola, M. S.] Auburn Univ, Dept Phys, Auburn, AL 36849 USA.
[Ballance, C. P.; Griffin, D. C.] Rollins Coll, Dept Phys, Winter Pk, FL 32789 USA.
[Bannister, M. E.; Fogle, M.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RP Ludlow, JA (reprint author), Auburn Univ, Dept Phys, Auburn, AL 36849 USA.
OI Bannister, Mark E./0000-0002-9572-8154
FU U. S. Department of Energy; National Energy Research Scientific
Computing Center in Oakland, California; National Center for
Computational Sciences in Oak Ridge, Tennessee
FX This work was supported in part by grants from the U. S. Department of
Energy. Computational work was carried out at the National Energy
Research Scientific Computing Center in Oakland, California and at the
National Center for Computational Sciences in Oak Ridge, Tennessee.
Experimental work was carried out at the Multicharged Ion Research
Facility in Oak Ridge, Tennessee.
NR 27
TC 5
Z9 5
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD NOV
PY 2008
VL 78
IS 5
AR 052708
DI 10.1103/PhysRevA.78.052708
PG 7
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 376XF
UT WOS:000261215600093
ER
PT J
AU Perdew, JP
Staroverov, VN
Tao, JM
Scuseria, GE
AF Perdew, John P.
Staroverov, Viktor N.
Tao, Jianmin
Scuseria, Gustavo E.
TI Density functional with full exact exchange, balanced nonlocality of
correlation, and constraint satisfaction
SO PHYSICAL REVIEW A
LA English
DT Article
ID GENERALIZED GRADIENT APPROXIMATION; GTO BASIS-SETS; CORRELATION-ENERGY;
ELECTRON-GAS; THERMOCHEMICAL KINETICS; HYBRID FUNCTIONALS; CORRELATION
HOLE; PAIR-DENSITY; ATOMS; ACCURATE
AB We construct a nonlocal density functional approximation with full exact exchange, while preserving the constraint-satisfaction approach and justified error cancellations of simpler semilocal functionals. This is achieved by interpolating between different approximations suitable for two extreme regions of the electron density. In a "normal" region, the exact exchange-correlation hole density around an electron is semilocal because its spatial range is reduced by correlation and because it integrates over a narrow range to -1. These regions are well described by popular semilocal approximations (many of which have been constructed nonempirically), because of proper accuracy for a slowly varying density or because of error cancellation between exchange and correlation. "Abnormal" regions, where nonlocality is unveiled, include those in which exchange can dominate correlation (one-electron, nonuniform high density, and rapidly varying limits), and those open subsystems of fluctuating electron number over which the exact exchange-correlation hole integrates to a value greater than -1. Regions between these extremes are described by a hybrid functional mixing exact and semilocal exchange energy densities locally, i.e., with a mixing fraction that is a function of position r and a functional of the density. Because our mixing fraction tends to 1 in the high-density limit, we employ full exact exchange according to the rigorous definition of the exchange component of any exchange-correlation energy functional. Use of full exact exchange permits the satisfaction of many exact constraints, but the nonlocality of exchange also requires balanced nonlocality of correlation. We find that this nonlocality can demand at least five empirical parameters, corresponding roughly to the four kinds of abnormal regions. Our local hybrid functional is perhaps the first accurate fourth-rung density functional or hyper-generalized gradient approximation, with full exact exchange, that is size-consistent in the way that simpler functionals are. It satisfies other known exact constraints, including exactness for all one-electron densities, and provides an excellent fit to the 223 molecular enthalpies of formation of the G3/99 set and the 42 reaction barrier heights of the BH42/03 set, improving both (but especially the latter) over most semilocal functionals and global hybrids. Exact constraints, physical insights, and paradigm examples hopefully suppress "overfitting.".
C1 [Perdew, John P.] Tulane Univ, Dept Phys, New Orleans, LA 70118 USA.
[Staroverov, Viktor N.] Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada.
[Tao, Jianmin] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Tao, Jianmin] Los Alamos Natl Lab, CNLS, Los Alamos, NM 87545 USA.
[Scuseria, Gustavo E.] Rice Univ, Dept Chem, Houston, TX 77005 USA.
RP Perdew, JP (reprint author), Tulane Univ, Dept Phys, New Orleans, LA 70118 USA.
RI Scuseria, Gustavo/F-6508-2011
FU National Science Foundation (NSF) [DMR-0501588, CHE-0807194]; Natural
Sciences and Engineering Research Council of Canada (NSERC); Department
of Energy [LDRD-PRD X9KU]
FX This work was supported by the National Science Foundation (NSF) under
Grants No. DMR-0501588 (J.P.P.) and No. CHE-0807194 (G.E.S.), by the
Natural Sciences and Engineering Research Council of Canada (NSERC)
through the Discovery Grants Program (V. N. S.), and by the Department
of Energy under Grant No. LDRD-PRD X9KU at LANL (J. T.)
NR 89
TC 107
Z9 107
U1 1
U2 20
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9926
EI 2469-9934
J9 PHYS REV A
JI Phys. Rev. A
PD NOV
PY 2008
VL 78
IS 5
AR 052513
DI 10.1103/PhysRevA.78.052513
PG 13
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 376XF
UT WOS:000261215600083
ER
PT J
AU Pesic, ZD
Rolles, D
Bilodeau, RC
Dimitriu, I
Berrah, N
AF Pesic, Z. D.
Rolles, D.
Bilodeau, R. C.
Dimitriu, I.
Berrah, N.
TI Three-body fragmentation of CO(2)2+upon K-shell photoionization
SO PHYSICAL REVIEW A
LA English
DT Article
ID COINCIDENCE EXPERIMENTS; SYNCHROTRON-RADIATION; DOUBLE-IONIZATION;
REACTION DYNAMICS; MOLECULES; DISSOCIATIONS; PEPIPICO; ION
AB The fragmentation dynamics of CO(2) molecules subsequent to K-shell photoexcitation and ionization was studied using a multicoincidence ion momentum imaging technique. The detailed analysis via fragment momentum correlation plots (Newton diagrams) clearly reveals concurrent fragmentation mechanisms for the three-body dissociation of CO(2)2+ into C(+)+O(+)+O, for both linear and bent geometry states of CO(2)2+. The experimental results are supported by a classical trajectory simulation based on a Coulomb explosion model, which elucidates energy and angular correlations between fragments for different fragmentation processes.
C1 [Pesic, Z. D.; Rolles, D.; Bilodeau, R. C.; Dimitriu, I.; Berrah, N.] Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA.
[Pesic, Z. D.; Rolles, D.; Bilodeau, R. C.; Dimitriu, I.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Pesic, ZD (reprint author), Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA.
EM z.pesic@fzd.de
OI Bilodeau, Rene/0000-0001-8607-2328
FU BES; DOE; CSGB divisions
FX This work is supported by BES, DOE, and CSGB divisions.
NR 20
TC 17
Z9 17
U1 0
U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD NOV
PY 2008
VL 78
IS 5
AR 051401
DI 10.1103/PhysRevA.78.051401
PG 4
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 376XF
UT WOS:000261215600005
ER
PT J
AU Solenov, D
Mozyrsky, D
AF Solenov, Dmitry
Mozyrsky, Dmitry
TI Quantum nucleation and macroscopic quantum tunneling in cold-atom
boson-fermion mixtures
SO PHYSICAL REVIEW A
LA English
DT Article
ID METASTABLE STATES; PHASE-SEPARATION; ABSOLUTE ZERO; TEMPERATURES;
CONDENSATE; DECAY
AB The kinetics of the phase separation transition in boson-fermion cold-atom mixtures is investigated. We identify the parameters at which the transition is governed by a quantum nucleation mechanism, responsible for the formation of critical nuclei of a stable phase. We demonstrate that for low fermion-boson mass ratio the density dependence of the quantum nucleation transition rate is experimentally observable. The crossover to the macroscopic quantum tunneling regime is analyzed. Based on a microscopic description of interacting cold-atom boson-fermion mixtures, we derive an effective action for the critical droplet and obtain an asymptotic expression for the nucleation rate in the vicinity of the phase transition and near the spinodal instability of the mixed phase. We show that dissipation due to excitations in the fermion subsystem play a dominant role close to the transition point.
C1 [Solenov, Dmitry; Mozyrsky, Dmitry] Los Alamos Natl Lab, Theoret Div T 4, Los Alamos, NM 87545 USA.
RP Solenov, D (reprint author), Los Alamos Natl Lab, Theoret Div T 4, Los Alamos, NM 87545 USA.
EM solenov@lanl.gov; mozyrsky@lanl.gov
RI Solenov, Dmitry/H-6250-2012;
OI Mozyrsky, Dima/0000-0001-5305-4617
FU U. S. DOE
FX We thank Eddy Timmermans for valuable discussions and comments. D. S.
acknowledges stimulating discussions with Vladimir Privman. The work is
supported by the U. S. DOE.
NR 30
TC 1
Z9 1
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD NOV
PY 2008
VL 78
IS 5
AR 053611
DI 10.1103/PhysRevA.78.053611
PG 12
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 376XF
UT WOS:000261215600128
ER
PT J
AU Bauer, ED
Ronning, F
Scott, BL
Thompson, JD
AF Bauer, E. D.
Ronning, F.
Scott, B. L.
Thompson, J. D.
TI Superconductivity in SrNi2As2 single crystals
SO PHYSICAL REVIEW B
LA English
DT Article
ID LAYERED SUPERCONDUCTOR; MAGNETIC-PROPERTIES; TERNARY ARSENIDES
AB The electrical resistivity rho(T) and heat capacity C(T) on single crystals of SrNi2As2 and EuNi2As2 are reported. While there is no evidence for a structural transition in either compound, SrNi2As2 is found to be a bulk superconductor at T-c=0.62 K with a Sommerfeld coefficient of gamma=8.7 mJ/mol K-2 and a small upper critical field H-c2 similar to 200 Oe. No superconductivity was found in EuNi2As2 above 0.4 K, but anomalies in rho and C reveal that magnetic order associated with the Eu2+ magnetic moments occurs at T-m=14 K.
C1 [Bauer, E. D.; Ronning, F.; Scott, B. L.; Thompson, J. D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Bauer, ED (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
RI Bauer, Eric/D-7212-2011; Scott, Brian/D-8995-2017;
OI Scott, Brian/0000-0003-0468-5396; Ronning, Filip/0000-0002-2679-7957;
Bauer, Eric/0000-0003-0017-1937
NR 26
TC 68
Z9 69
U1 8
U2 39
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 NOV
PY 2008
VL 78
IS 17
AR 172504
DI 10.1103/PhysRevB.78.172504
PG 3
WC Physics, Condensed Matter
SC Physics
GA 376WU
UT WOS:000261214500015
ER
PT J
AU Binz, SM
Hupalo, M
Tringides, MC
AF Binz, S. M.
Hupalo, M.
Tringides, M. C.
TI Height-dependent nucleation and ideal layer by layer growth in
Pb/Pb(111)/Si(111)
SO PHYSICAL REVIEW B
LA English
DT Article
DE diffusion barriers; lead; metallic thin films; nucleation; scanning
tunnelling microscopy; surface morphology
ID LOW-TEMPERATURES; EPITAXIAL-GROWTH; FILMS; DIFFRACTION; INTERFACE;
ISLANDS; SIZE
AB It has been puzzling why for Pb/Si(111), oscillations have been observed at temperatures as low as 18 K and were found to improve with decreasing temperature. With scanning tunneling microscope we have directly observed this ideal layer by layer growth. A dramatic dependence of the second layer island morphology on island height, expected from quantum size effects (QSE), is also found. Low density of fractal islands on stable vs high density on unstable Pb islands on a mixed height island confirms the role of QSE in kinetics. The low diffusion barrier and the fractal island morphology can explain the unusual layer by layer growth.
C1 [Tringides, M. C.] Iowa State Univ, USDOE, Dept Phys, Ames, IA 50011 USA.
Iowa State Univ, USDOE, Ames Lab, Ames, IA 50011 USA.
RP Tringides, MC (reprint author), Iowa State Univ, USDOE, Dept Phys, Ames, IA 50011 USA.
EM tringides@ameslab.gov
FU Basic Sciences; U.S. Department of Energy [DE-AC02_07CH11358]
FX Work at Ames Laboratory was supported by the Basic Sciences, U.S.
Department of Energy under Contract No. DE-AC02_07CH11358.
NR 27
TC 15
Z9 15
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 NOV
PY 2008
VL 78
IS 19
AR 193407
DI 10.1103/PhysRevB.78.193407
PG 4
WC Physics, Condensed Matter
SC Physics
GA 396RC
UT WOS:000262607800024
ER
PT J
AU Blackburn, E
Sanchez-Hanke, C
Roy, S
Smith, DJ
Hong, JI
Chan, KT
Berkowitz, AE
Sinha, SK
AF Blackburn, E.
Sanchez-Hanke, C.
Roy, S.
Smith, D. J.
Hong, J. -I.
Chan, K. T.
Berkowitz, A. E.
Sinha, S. K.
TI Pinned Co moments in a polycrystalline permalloy/CoO exchange-biased
bilayer
SO PHYSICAL REVIEW B
LA English
DT Article
ID ANISOTROPY; FILMS
AB We have measured element-specific magnetization depth profiles across the interface between a polycrystalline ferromagnet and an antiferromagnet in an exchange-biased bilayer of Py/CoO. Using soft x-ray resonant reflectivity we have identified a thin (0.5 nm) layer containing uncompensated Co magnetization at the interface with the Py. The majority of this magnetization follows the external field; however, similar to 10% of the magnetization in this interfacial layer is pinned antiparallel to the cooling field used when biasing the sample, consistent with the negative exchange bias in this bilayer system, provided that the pinned Co spins are antiferromagnetically coupled to the ferromagnetic layer.
C1 [Blackburn, E.; Berkowitz, A. E.; Sinha, S. K.] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
[Sanchez-Hanke, C.] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
[Roy, S.] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
[Smith, D. J.] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA.
[Hong, J. -I.] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
[Chan, K. T.; Berkowitz, A. E.] Univ Calif San Diego, Ctr Magnet Recording Res, La Jolla, CA 92093 USA.
RP Blackburn, E (reprint author), Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England.
RI HONG, JUNG-IL/B-8566-2008; Blackburn, Elizabeth/C-2312-2014
OI HONG, JUNG-IL/0000-0001-7301-6693;
FU Department of Energy [DE-FG02-03ER46084]; U.S. Department of Energy
[DE-AC02-05CH11231]
FX We thank the Center for Magnetic Recording Research, UC San Diego, for
supporting this effort. This work was supported in part by the
Department of Energy under Grant No. DE-FG02-03ER46084. Work at LBNL 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.
NR 21
TC 21
Z9 21
U1 0
U2 22
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 NOV
PY 2008
VL 78
IS 18
AR 180408
DI 10.1103/PhysRevB.78.180408
PG 4
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800010
ER
PT J
AU Bocklage, L
Kruger, B
Eiselt, R
Bolte, M
Fischer, P
Meier, G
AF Bocklage, Lars
Krueger, Benjamin
Eiselt, Rene
Bolte, Markus
Fischer, Peter
Meier, Guido
TI Time-resolved imaging of current-induced domain-wall oscillations
SO PHYSICAL REVIEW B
LA English
DT Article
ID MAGNETIZATION DYNAMICS
AB Current-induced domain-wall dynamics is investigated via high-resolution soft x-ray transmission microscopy by a stroboscopic pump-and-probe measurement scheme at a temporal resolution of 200 ps. A 180 degrees domain wall in a restoring potential of a permalloy microstructure is displaced from its equilibrium position by nanosecond current pulses leading to oscillations with velocities up to 325 m/s. The motion of the wall is described with an analytical model of a rigid domain wall in a nonharmonic potential allowing one to determine the mass of the domain wall. We show that Oersted fields dominate the domain-wall dynamics in our geometry.
C1 [Bocklage, Lars; Eiselt, Rene; Bolte, Markus; Meier, Guido] Univ Hamburg, Inst Angew Phys, D-20355 Hamburg, Germany.
[Bocklage, Lars; Eiselt, Rene; Bolte, Markus; Meier, Guido] Univ Hamburg, Zentrum Mikrostrukturforsch, D-20355 Hamburg, Germany.
[Krueger, Benjamin] Univ Hamburg, Inst Theoret Phys 1, D-20355 Hamburg, Germany.
[Fischer, Peter] Lawrence Berkeley Natl Lab, Ctr Xray Opt, Berkeley, CA 94720 USA.
RP Bocklage, L (reprint author), Univ Hamburg, Inst Angew Phys, Jungiusstr 11, D-20355 Hamburg, Germany.
EM lbocklag@physnet.uni-hamburg.de; bkrueger@physnet.uni-hamburg.de
RI Bolte, Markus/A-6083-2009; Fischer, Peter/A-3020-2010; Krueger,
Benjamin/B-7466-2009; MSD, Nanomag/F-6438-2012;
OI Fischer, Peter/0000-0002-9824-9343; Krueger,
Benjamin/0000-0001-8502-368X; Bocklage, Lars/0000-0001-9769-4173
NR 20
TC 40
Z9 40
U1 2
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 NOV
PY 2008
VL 78
IS 18
AR 180405
DI 10.1103/PhysRevB.78.180405
PG 4
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800007
ER
PT J
AU Chan, JA
Liu, JZ
Raebiger, H
Lany, S
Zunger, A
AF Chan, J. A.
Liu, Jefferson Z.
Raebiger, Hannes
Lany, Stephan
Zunger, Alex
TI Relative stability, electronic structure, and magnetism of MnN and (Ga,
Mn)N alloys
SO PHYSICAL REVIEW B
LA English
DT Article
ID MOLECULAR-BEAM EPITAXY; AB-INITIO; FERROMAGNETIC SEMICONDUCTORS;
NEUTRON-DIFFRACTION; PHASE-TRANSITION; ZINCBLENDE MNAS; DENSITY; GAN;
APPROXIMATION; SPINTRONICS
AB Pure MnN and (Ga,Mn) N alloys are investigated using the ab initio generalized gradient approximation +U (GGA+U) or the hybrid-exchange density-functional (B3LYP) methods. These methods are found to predict dramatically different electronic structure, magnetic behavior, and relative stabilities compared to previous density-functional theory (DFT) calculations. A unique structural anomaly of MnN, in which local-density calculations fail to predict the experimentally observed distorted rocksalt as the ground-state structure, is resolved under the GGA+U and B3LYP formalisms. The magnetic configurations of MnN are studied and the results suggest the magnetic state of zinc-blende MnN might be complex. Epitaxial calculations are used to show that the epitaxial zinc-blende MnN can be stabilized on an InGaN substrate. The structural stability of (Ga,Mn) N alloys was examined and a crossover from the zinc-blende-stable alloy to the rocksalt-stable alloy at an Mn concentration of similar to 65% was found. The tendency for zinc-blende (Ga,Mn) N alloys to phase separate is described by an asymmetric spinodal phase diagram calculated from a mixed-basis cluster expansion. This predicts that precipitates will consist of Mn concentrations of similar to 5 and similar to 50% at typical experimental growth temperatures. Thus, pure antiferromagnetic MnN, previously thought to suppress the Curie temperature, will not be formed. The Curie temperature for the 50% phase is calculated to be T-C=354 K, indicating the possibility of high-temperature ferromagnetism in zinc-blende (Ga,Mn) N alloys due to precipitates.
C1 [Chan, J. A.; Liu, Jefferson Z.; Raebiger, Hannes; Lany, Stephan; Zunger, Alex] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Chan, JA (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
RI Liu, Jefferson zhe/B-5916-2008; Zunger, Alex/A-6733-2013; Raebiger,
Hannes/D-1881-2013
OI Lany, Stephan/0000-0002-8127-8885; Liu, Jefferson
zhe/0000-0002-5282-7945; Raebiger, Hannes/0000-0003-3969-9165
FU U.S. Department of Energy, Office of Science; NREL [DE-AC36-08GO28308]
FX We thank S.-H. Wei for helpful comments. This work was funded by the
U.S. Department of Energy, Office of Science, under NREL Contract No.
DE-AC36-08GO28308.
NR 74
TC 27
Z9 27
U1 2
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 NOV
PY 2008
VL 78
IS 18
AR 184109
DI 10.1103/PhysRevB.78.184109
PG 11
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800034
ER
PT J
AU Chroneos, A
Bracht, H
Jiang, C
Uberuaga, BP
Grimes, RW
AF Chroneos, A.
Bracht, H.
Jiang, C.
Uberuaga, B. P.
Grimes, R. W.
TI Nonlinear stability of E centers in Si1-xGex: Electronic structure
calculations
SO PHYSICAL REVIEW B
LA English
DT Article
DE binding energy; colour centres; density functional theory; diffusion;
Ge-Si alloys; semiconductor materials; vacancies (crystal)
ID ATOMIC-SCALE SIMULATIONS; QUASI-RANDOM-STRUCTURES; VACANCY COMPLEXES;
SELF-DIFFUSION; 1ST PRINCIPLES; BINARY-ALLOYS; SI-GE; GERMANIUM;
SILICON; APPROXIMATION
AB Electronic structure calculations are used to investigate the binding energies of defect pairs composed of lattice vacancies and phosphorus or arsenic atoms (E centers) in silicon-germanium alloys. To describe the local environment surrounding the E center we have generated special quasirandom structures that represent random silicon-germanium alloys. It is predicted that the stability of E centers does not vary linearly with the composition of the silicon-germanium alloy. Interestingly, we predict that the nonlinear behavior does not depend on the donor atom of the E center but only on the host lattice. The impact on diffusion properties is discussed in view of recent experimental and theoretical results.
C1 [Chroneos, A.; Bracht, H.] Univ Munster, Inst Mat Phys, D-48149 Munster, Germany.
[Jiang, C.; Uberuaga, B. P.] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
[Grimes, R. W.] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England.
RP Chroneos, A (reprint author), Univ Munster, Inst Mat Phys, Wilhelm Klemm Str 10, D-48149 Munster, Germany.
EM alexander.chroneos@imperial.ac.uk
RI Jiang, Chao/A-2546-2011;
OI Chroneos, Alex/0000-0002-2558-495X
FU U.S. Department of Energy; Deutsche Forschungsgemeinschaft; U.S.
Department of Energy [DE-AC5206NA25396]
FX Computing resources were provided by the HPC facility of Imperial
College London. C.J. and B. P. U. acknowledge support from the U.S.
Department of Energy, Office of Basic Energy Sciences, and H. B.
acknowledges support from the Deutsche Forschungsgemeinschaft. Los
Alamos National Laboratory 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 63
TC 51
Z9 51
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 NOV
PY 2008
VL 78
IS 19
AR 195201
DI 10.1103/PhysRevB.78.195201
PG 7
WC Physics, Condensed Matter
SC Physics
GA 396RC
UT WOS:000262607800050
ER
PT J
AU da Silva, LGGVD
Heidrich-Meisner, F
Feiguin, AE
Busser, CA
Martins, GB
Anda, EV
Dagotto, E
AF da Silva, Luis G. G. V. D.
Heidrich-Meisner, F.
Feiguin, A. E.
Buesser, C. A.
Martins, G. B.
Anda, E. V.
Dagotto, E.
TI Transport properties and Kondo correlations in nanostructures:
Time-dependent DMRG method applied to quantum dots coupled to Wilson
chains
SO PHYSICAL REVIEW B
LA English
DT Article
DE electric admittance; hopping conduction; Kondo effect; nanostructured
materials; quantum dots; renormalisation
ID NUMERICAL RENORMALIZATION-GROUP; DENSITY-MATRIX RENORMALIZATION;
IMPURITY; SYSTEMS
AB We apply the adaptive time-dependent density-matrix renormalization-group method (tDMRG) to the study of transport properties of quantum-dot systems connected to metallic leads. Finite-size effects make the usual tDMRG description of the Kondo regime a numerically demanding task. We show that such effects can be attenuated by describing the leads by "Wilson chains," in which the hopping matrix elements decay exponentially away from the impurity (t(n)proportional to Lambda(-n/2)). For a given system size and in the linear-response regime, results for Lambda>1 show several improvements over the undamped Lambda=1 case: perfect conductance is obtained deeper in the strongly interacting regime and current plateaus remain well defined for longer time scales. Similar improvements were obtained in the finite-bias regime up to bias voltages of the order of the Kondo temperature. These results show that with the proposed modification, the tDMRG characterization of Kondo correlations in the transport properties can be substantially improved, while it turns out to be sufficient to work with much smaller system sizes. We discuss the numerical cost of this approach with respect to the necessary system sizes and the entanglement growth during the time evolution.
C1 [da Silva, Luis G. G. V. D.; Dagotto, E.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
[da Silva, Luis G. G. V. D.; Dagotto, E.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Heidrich-Meisner, F.] Univ Aachen, Rhein Westfal TH Aachen, Inst Theoret Phys C, D-52056 Aachen, Germany.
[Heidrich-Meisner, F.] Forschungszentrum Julich, D-52425 Julich, Germany.
[Feiguin, A. E.] Univ Calif Santa Barbara, Microsoft Project Q, Santa Barbara, CA 93106 USA.
[Feiguin, A. E.] Univ Maryland, Dept Phys, Condensed Matter Theory Ctr, College Pk, MD 20742 USA.
[Buesser, C. A.; Martins, G. B.] Oakland Univ, Dept Phys, Rochester, MI 48309 USA.
[Anda, E. V.] Pontificia Univ Catolica Rio de Janeiro PUC Rio, Dept Fis, BR-22452970 Rio De Janeiro, Brazil.
RP da Silva, LGGVD (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RI Heidrich-Meisner, Fabian/B-6228-2009; Dias da Silva, Luis/D-8381-2013;
Busser, Carlos/K-1017-2014; Martins, George/C-9756-2012
OI Dias da Silva, Luis/0000-0002-8156-9463; Busser,
Carlos/0000-0002-0353-7490; Martins, George/0000-0001-7846-708X
FU Division of Materials Sciences and Engineering, Office of Basic Energy
Sciences, U.S. Department of Energy [DE-AC05-00OR22725]; NSF
[DMR-0706020, DMR-0710529]; DFG through FOR 912 [HE 5242/2-1]; FAPERJ;
CNPq [CIAM 490865/2006-2]
FX We sincerely thank K. A. Al-Hassanieh, I. P. McCulloch, G. Roux, H.
Onishi, and U. Schollwock for fruitful discussions and valuable comments
on the manuscript. Research at ORNL is 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. E.
D. and L.D.d.S. are supported in part by NSF under Grant No.
DMR-0706020. F.H.-M. acknowledges support from the DFG through FOR 912,
Grant No. HE 5242/2-1. G. B. M. and C. A. B. acknowledge support from
NSF (Grant No. DMR-0710529). E. V. A. acknowledges support from
Brazilian agencies FAPERJ and CNPq (Grant No. CIAM 490865/2006-2)
NR 59
TC 44
Z9 44
U1 0
U2 10
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 NOV
PY 2008
VL 78
IS 19
AR 195317
DI 10.1103/PhysRevB.78.195317
PG 9
WC Physics, Condensed Matter
SC Physics
GA 396RC
UT WOS:000262607800076
ER
PT J
AU Daghofer, M
Noack, RM
Horsch, P
AF Daghofer, M.
Noack, R. M.
Horsch, P.
TI Magnetism of one-dimensional Wigner lattices and its impact on charge
order
SO PHYSICAL REVIEW B
LA English
DT Article
ID HUBBARD-MODEL; TETRACYANOQUINODIMETHANE TCNQ; FERROMAGNETISM; CRYSTAL;
SR14CU24O41; EXCHANGE; SOLITONS; SALTS; STATE; BAND
AB The magnetic phase diagram of the quarter-filled generalized Wigner lattice with nearest-neighbor and next-nearest-neighbor hoppings, t(1) and t(2), is explored. We find a region at negative t(2) with fully saturated ferromagnetic ground states that we attribute to kinetic exchange. Such interaction disfavors antiferromagnetism at t(2)< 0 and stems from virtual excitations across the charge gap of the Wigner lattice, which is much smaller than the Mott-Hubbard gap proportional to U. Remarkably, we find a strong dependence of the charge structure factor on magnetism even in the limit U ->infinity, in contrast to the expectation that charge ordering in the Wigner lattice regime should be well described by spinless fermions. Our results, obtained using the density-matrix renormalization group and exact diagonalization, can be transparently explained by means of an effective low-energy Hamiltonian.
C1 [Daghofer, M.; Horsch, P.] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany.
[Daghofer, M.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Daghofer, M.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Noack, R. M.] Philipps Univ Marburg, D-35032 Marburg, Germany.
RP Daghofer, M (reprint author), Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany.
EM m.daghofer@fkf.mpg.de
RI Daghofer, Maria/C-5762-2008; Horsch, Peter/B-9612-2011
OI Daghofer, Maria/0000-0001-9434-8937;
FU NSF [DMR-0706020]
FX We thank D. Baeriswyl, K. Hallberg, M. Jansen, N. Kawakami, B. Keimer,
G. Khaliullin, S. Maekawa, W. Metzner, C. Penc, R. Zeyher, and T.
Tohyama for useful discussions. This research (M. D.) was partly
supported by the NSF under Grant No. DMR-0706020.
NR 49
TC 3
Z9 3
U1 2
U2 3
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 NOV
PY 2008
VL 78
IS 20
AR 205115
DI 10.1103/PhysRevB.78.205115
PG 7
WC Physics, Condensed Matter
SC Physics
GA 376XD
UT WOS:000261215400028
ER
PT J
AU Dong, S
Yu, R
Yunoki, S
Alvarez, G
Liu, JM
Dagotto, E
AF Dong, Shuai
Yu, Rong
Yunoki, Seiji
Alvarez, Gonzalo
Liu, J. -M.
Dagotto, Elbio
TI Magnetism, conductivity, and orbital order in (LaMnO3)(2n)/(SrMnO3)(n)
superlattices
SO PHYSICAL REVIEW B
LA English
DT Article
ID NEUTRON-DIFFRACTION; RECONSTRUCTION; INTERFACE
AB The modulation of charge density and spin order in (LaMnO3)(2n)/(SrMnO3)(n) (n=1-4) superlattices is studied via Monte Carlo simulations of the double-exchange model. G-type antiferromagnetic barriers in the SrMnO3 regions with low charge density are found to separate ferromagnetic LaMnO3 layers with high charge density. A metal-insulator transition with increasing n is observed in the direction perpendicular to the interfaces. Our simulations provide insight into how disorder-induced localization may cause the metal-insulator transition occurring at n=3 in experiments.
C1 [Dong, Shuai; Yu, Rong; Dagotto, Elbio] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Dong, Shuai; Yu, Rong; Dagotto, Elbio] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Dong, Shuai; Liu, J. -M.] Nanjing Univ, Nanjing Natl Lab Microstruct, Nanjing 210093, Peoples R China.
[Yunoki, Seiji] RIKEN, Computat Condensed Matter Phys Lab, Wako, Saitama 3510198, Japan.
[Yunoki, Seiji] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan.
[Alvarez, Gonzalo] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
[Alvarez, Gonzalo] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Dong, S (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RI YU, RONG/C-1506-2012; Yunoki, Seiji/B-1831-2008; Yu, Rong/K-5854-2012;
Dong (董), Shuai (帅)/A-5513-2008; Yu, Rong/H-3355-2016
OI Dong (董), Shuai (帅)/0000-0002-6910-6319;
FU NSF [DMR-0706020, 50832002]; Division of Materials Science and
Engineering; U.S. DOE; CREST-JST; CNMS; Scientific User Facilities
Division; BES-DOE; 973 Projects of China [2006CB921802]; China
Scholarship Council
FX We thank A. Bhattacharya, S. May, M. Daghofer, and S. Okamoto for
helpful discussions. This work was supported by the NSF under Grant No.
DMR-0706020 and the Division of Materials Science and Engineering, U.S.
DOE, under contract with UT-Battelle, LLC. S.Y. was supported by
CREST-JST. G.A. was supported by the CNMS, sponsored by the Scientific
User Facilities Division, BES-DOE. J.-M.L. was supported by the 973
Projects of China (Grant No. 2006CB921802) and NSF of China (Grant No.
50832002). S.D. was supported by the China Scholarship Council.
NR 31
TC 62
Z9 63
U1 2
U2 33
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 NOV
PY 2008
VL 78
IS 20
AR 201102
DI 10.1103/PhysRevB.78.201102
PG 4
WC Physics, Condensed Matter
SC Physics
GA 376XD
UT WOS:000261215400002
ER
PT J
AU Du, MH
AF Du, Mao-Hua
TI Bismuth-induced deep levels and carrier compensation in CdTe
SO PHYSICAL REVIEW B
LA English
DT Article
ID DONOR LEVELS; SEMICONDUCTORS; CRYSTALS; GROWTH
AB First-principles calculations show that Bi on Cd site in CdTe can be either a donor Bi(Cd)(+) or an acceptor Bi(Cd)(-), depending on the Fermi level. The Bi(Cd)(-) can bind a substitutional O (O(Te)) with large binding energy of 1.40 eV. The calculated (0/-) transition level for Bi(Cd)(-)-O(Te) complex is in good agreement with experimentally observed deep hole trapping level. Bi can also substitute Te to form an acceptor. The amphoteric nature of Bi in CdTe results in the pinning of the Fermi level and the high resistivity. The transition of the CdTe samples from semi-insulating to p type at high Bi doping levels is explained by the formation of secondary phase that contains Bi and Te.
C1 [Du, Mao-Hua] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Du, Mao-Hua] 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
OI Du, Mao-Hua/0000-0001-8796-167X
FU U.S. DOE Office of Nonproliferation Research; Development NA22
FX The author thanks D. J. Singh for helpful discussions. This work was
supported by the U.S. DOE Office of Nonproliferation Research and
Development NA22.
NR 24
TC 13
Z9 14
U1 0
U2 3
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 NOV
PY 2008
VL 78
IS 17
AR 172105
DI 10.1103/PhysRevB.78.172105
PG 4
WC Physics, Condensed Matter
SC Physics
GA 376WU
UT WOS:000261214500005
ER
PT J
AU Fernandes, RM
Schmalian, J
Westfahl, H
AF Fernandes, Rafael M.
Schmalian, Joerg
Westfahl, Harry, Jr.
TI Conductivity of electronic liquid-crystalline mesophases
SO PHYSICAL REVIEW B
LA English
DT Article
ID HIGH-TEMPERATURE SUPERCONDUCTORS; CORRELATED PERCOLATION;
PHASE-TRANSITIONS; RESISTOR NETWORK; LONG-RANGE; STATE; SEPARATION;
GLASSES; STRIPES; SYSTEM
AB We investigate the connection between the transport properties and the thermodynamics of electronic systems with a tendency to form broken-symmetry mesophases evocative of the physics of liquid crystals. Through a hydrodynamic approach to the electronic transport in inhomogeneous systems, we develop a perturbative expansion for the macroscopic conductivity to study the transport of two-dimensional smectic and nematic phases. At the fluctuation-induced first-order phase transition expected for the smectic to isotropic transition, a jump in the macroscopic conductivity is predicted, with a directional dependence that reflects the fluctuation spectrum of the order parameter. When elastic fluctuation modes melt the smectic phase into a nematic phase, the resultant nematic order parameter is shown to be linearly proportional to the conductivity anisotropy. We also outline qualitative comparisons with recent experimental works on strongly correlated materials that show evidences of electronic liquid-crystalline mesophases.
C1 [Fernandes, Rafael M.; Schmalian, Joerg] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
[Fernandes, Rafael M.; Schmalian, Joerg] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Fernandes, Rafael M.; Westfahl, Harry, Jr.] Lab Nacl Luz Sincrotron, BR-13083970 Campinas, SP, Brazil.
[Fernandes, Rafael M.] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil.
RP Fernandes, RM (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
EM rafaelmf@ameslab.gov
RI Schmalian, Joerg/H-2313-2011; Fernandes, Rafael/E-9273-2010; Inst. of
Physics, Gleb Wataghin/A-9780-2017
FU CAPES; CNPq (Brazil); Ames Laboratory operated for the U.S. Department
of Energy by Iowa State University [DE-AC02-07CH11358]
FX The authors would like to thank C. Batista, V. Dobrosavljevic, E.
Fradkin, S. Papanikolaou, P. Phillipps, and P. G. Wolynes for helpful
discussions. This research was supported by CAPES and CNPq (Brazil) and
by the Ames Laboratory operated for the U.S. Department of Energy by
Iowa State University under Contract No. DE-AC02-07CH11358.
NR 43
TC 3
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U1 1
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 NOV
PY 2008
VL 78
IS 18
AR 184201
DI 10.1103/PhysRevB.78.184201
PG 9
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800038
ER
PT J
AU Gooch, M
Lv, B
Lorenz, B
Guloy, AM
Chu, CW
AF Gooch, Melissa
Lv, Bing
Lorenz, Bernd
Guloy, Arnold M.
Chu, Ching-Wu
TI Pressure-induced shift of T-c in KxSr1-xFe2As2 (x=0.2, 0.4, 0.7):
Analogy to the high-T-c cuprate superconductors
SO PHYSICAL REVIEW B
LA English
DT Article
ID LAYERED QUATERNARY COMPOUND; 43 K; CRYSTAL; EARTH; METAL
AB The systematic pressure shifts of T-c were investigated in the whole phase diagram of the FeAs-based superconducting compound KxSr1-xFe2As2. Different regions, arising from corresponding responses of Tc to pressure (dT(c)/dp>0, similar or equal to 0, or <0), can be clearly distinguished. This reveals an interesting similarity of the FeAs superconductors and the high-T-c cuprates. This behavior is a manifestation of the layered structure of the FeAs compounds and the pressure-induced charge transfer between the (Fe2As2) and (K/Sr) layers. The coexistence of superconductivity and spin-density wave behavior were also observed, and the pressure effects on the latter is explored.
C1 [Gooch, Melissa; Lv, Bing; Lorenz, Bernd; Guloy, Arnold M.; Chu, Ching-Wu] Univ Houston, TCSUH, Houston, TX 77204 USA.
[Gooch, Melissa; Lorenz, Bernd; Chu, Ching-Wu] Univ Houston, Dept Phys, Houston, TX 77204 USA.
[Lv, Bing; Guloy, Arnold M.] Univ Houston, Dept Chem, Houston, TX 77204 USA.
[Chu, Ching-Wu] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Chu, Ching-Wu] Hong Kong Univ Sci & Technol, Hong Kong, Hong Kong, Peoples R China.
RP Gooch, M (reprint author), Univ Houston, TCSUH, Houston, TX 77204 USA.
RI Lv, Bing/E-3485-2010
FU T. L. L. Temple Foundation; J.J. and R. Moores Endowment; State of Texas
through TCSUH; USAF Office of Scientific Research; LBNL through USDOE.
A. M. G; NSF [CHE-0616805]; R. A. Welch Foundation
FX This work is supported in part by the T. L. L. Temple Foundation, the
J.J. and R. Moores Endowment, the State of Texas through TCSUH, the USAF
Office of Scientific Research, and the LBNL through USDOE. A. M. G. and
B. L. acknowledge the support from the NSF (Grant No. CHE-0616805) and
the R. A. Welch Foundation.
NR 35
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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 NOV
PY 2008
VL 78
IS 18
AR 180508
DI 10.1103/PhysRevB.78.180508
PG 4
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800025
ER
PT J
AU Groger, R
Lookman, T
Saxena, A
AF Groeger, R.
Lookman, T.
Saxena, A.
TI Defect-induced incompatibility of elastic strains: Dislocations within
the Landau theory of martensitic phase transformations
SO PHYSICAL REVIEW B
LA English
DT Article
ID CU-ZN-AL; SHAPE-MEMORY ALLOYS; SINGLE-CRYSTALS; 2 DIMENSIONS;
DISTRIBUTIONS; DEFORMATION; APPROXIMATION; MECHANICS; DYNAMICS; BEHAVIOR
AB In dislocation-free martensites the components of the elastic strain tensor are constrained by the Saint-Venant compatibility condition which guarantees continuity of the body during external loading. However, in dislocated materials the plastic part of the distortion tensor introduces a displacement mismatch that is removed by elastic relaxation. The elastic strains are then no longer compatible in the sense of the Saint-Venant law and the ensuing incompatibility tensor is shown to be proportional to the gradients of the Nye dislocation density tensor. We demonstrate that the presence of this incompatibility gives rise to an additional long-range contribution in the inhomogeneous part of the Landau energy functional and to the corresponding stress fields. Competition among the local and long-range interactions results in frustration in the evolving order parameter (elastic) texture. We show how the Peach-Koehler forces and stress fields for any distribution of dislocations in arbitrarily anisotropic media can be calculated and employed in a Fokker-Planck dynamics for the dislocation density. This approach represents a self-consistent scheme that yields the evolutions of both the order parameter field and the continuous dislocation density. We illustrate our method by studying the effects of dislocations on microstructure, particularly twinned domain walls, in an Fe-Pd alloy undergoing a martensitic transformation.
C1 [Groeger, R.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP Groger, R (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA.
EM groger@lanl.gov
RI Groger, Roman/G-3608-2010;
OI Lookman, Turab/0000-0001-8122-5671
FU International Conference on Martensitic Transformations [ICOMAT-08]
FX The authors thank F.-J. Perez-Reche, R. Ahluwalia, K. Dayal, S.
Sengupta, J. San Juan, and A. Roytburd for their comments and
stimulating discussion of this work during the International Conference
on Martensitic Transformations (ICOMAT-08) in Santa Fe, New Mexico. In
addition, they thank A. Acharya for bringing to their attention his work
on the subject.
NR 54
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U1 1
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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 NOV
PY 2008
VL 78
IS 18
AR 184101
DI 10.1103/PhysRevB.78.184101
PG 14
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800026
ER
PT J
AU Hicks, DG
Boehly, TR
Celliers, PM
Bradley, DK
Eggert, JH
McWilliams, RS
Jeanloz, R
Collins, GW
AF Hicks, D. G.
Boehly, T. R.
Celliers, P. M.
Bradley, D. K.
Eggert, J. H.
McWilliams, R. S.
Jeanloz, R.
Collins, G. W.
TI High-precision measurements of the diamond Hugoniot in and above the
melt region
SO PHYSICAL REVIEW B
LA English
DT Article
ID SHOCK COMPRESSION; ELECTRONIC-PROPERTIES; PHASE-DIAGRAM; CARBON;
INTERFEROMETER; PRESSURES; GRAPHITE; STATE
AB High-precision measurements of the diamond principal Hugoniot have been made at pressures between 6 and 19 Mbar. Shock velocities were determined with 0.3%-1.1% precision using a velocity interferometer. Impedance-matching analysis, incorporating systematic uncertainties in the equation of state of the quartz standard, was used to determine the Hugoniot with 1.2%-2.7% precision in density. The results are in good agreement with published ab initio calculations, which predict a small negative melt slope along the Hugoniot, but disagree with previous laser-driven shock wave experiments, which had observed a large density increase in the melt region. In the extensive solid-liquid coexistence regime between 6 and 10 Mbar, the present measurements indicate that the mixed phase is a few percent more dense than what would be expected from a simple interpolation between liquid and solid Hugoniots.
C1 [Hicks, D. G.; Celliers, P. M.; Bradley, D. K.; Eggert, J. H.; McWilliams, R. S.; Collins, G. W.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Boehly, T. R.] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA.
[McWilliams, R. S.; Jeanloz, R.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
RP Hicks, DG (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM hicks13@llnl.gov
RI Collins, Gilbert/G-1009-2011; Hicks, Damien/B-5042-2015; McWilliams,
R./J-4358-2016
OI Hicks, Damien/0000-0001-8322-9983;
FU Lawrence Livermore National Laboratory [W-7405-Eng-48,
DE-AC52-07NA27344]; University of Rochester [DE-FC03-92SF19460]
FX We thank the Omega operations crew for help in carrying out the
experiments, Mark Bonino and the Omega target fabrication group for
their outstanding work, and Walter Unites for his assistance throughout.
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, and
by the University of Rochester under Cooperative Agreement No.
DE-FC03-92SF19460.
NR 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 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD NOV
PY 2008
VL 78
IS 17
AR 174102
DI 10.1103/PhysRevB.78.174102
PG 8
WC Physics, Condensed Matter
SC Physics
GA 376WU
UT WOS:000261214500021
ER
PT J
AU Huda, MN
Yan, YF
Wei, SH
Al-Jassim, MM
AF Huda, Muhammad N.
Yan, Yanfa
Wei, Su-Huai
Al-Jassim, Mowafak M.
TI Electronic structure of ZnO:GaN compounds: Asymmetric bandgap
engineering
SO PHYSICAL REVIEW B
LA English
DT Article
DE density functional theory; energy gap; gallium compounds; III-V
semiconductors; II-VI semiconductors; wide band gap semiconductors; zinc
compounds
ID TOTAL-ENERGY CALCULATIONS; AUGMENTED-WAVE METHOD; HYDROGEN-PRODUCTION;
SOLAR-ENERGY; BASIS-SET; (GA1-XZNX)(N1-XOX); WATER; SEMICONDUCTORS;
PHOTOCATALYST; SOLIDS
AB ZnO and GaN have a type-II band offset. The incorporation of one compound into the other would lead to a reduced bandgap as compared to that of either ZnO or GaN. Our density-functional theory calculation reveals an asymmetric bandgap reduction in this nonisovalent system; i.e., incorporating GaN in a ZnO host results in a much more effective bandgap reduction than incorporating ZnO in a GaN host. We further find that the random-alloy system is more favorable than the superlattice system in terms of light absorption in the longer-wavelength regions. Our results suggest that the wave-function localization at the band edges plays an important role in how to choose the host material and dopant for effective bandgap engineering through semiconductor compound alloying.
C1 [Huda, Muhammad N.; Yan, Yanfa; Wei, Su-Huai; Al-Jassim, Mowafak M.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Huda, MN (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM muhammad_huda@nrel.gov
RI Huda, Muhammad/C-1193-2008
OI Huda, Muhammad/0000-0002-2655-498X
FU U.S. Department of Energy [DE-AC36-99-GO10337]; Office of Science of the
U.S. Department of Energy [DE-AC0205CH11231]
FX This work was supported by the U.S. Department of Energy through the
UNLV Research Foundation under Contract No. DE-AC36-99-GO10337. This
research used resources of the National Energy Research Scientific
Computing Center, which is supported by the Office of Science of the
U.S. Department of Energy under Contract No. DE-AC0205CH11231.
NR 23
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U1 2
U2 47
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 NOV
PY 2008
VL 78
IS 19
AR 195204
DI 10.1103/PhysRevB.78.195204
PG 5
WC Physics, Condensed Matter
SC Physics
GA 396RC
UT WOS:000262607800053
ER
PT J
AU Iavarone, M
Di Capua, R
Karapetrov, G
Koshelev, AE
Rosenmann, D
Claus, H
Malliakas, CD
Kanatzidis, MG
Nishizaki, T
Kobayashi, N
AF Iavarone, M.
Di Capua, R.
Karapetrov, G.
Koshelev, A. E.
Rosenmann, D.
Claus, H.
Malliakas, C. D.
Kanatzidis, M. G.
Nishizaki, T.
Kobayashi, N.
TI Effect of magnetic impurities on the vortex lattice properties in NbSe2
single crystals
SO PHYSICAL REVIEW B
LA English
DT Article
ID HIGH-TEMPERATURE SUPERCONDUCTORS; UPPER CRITICAL FIELDS; VORTICES;
2H-NBSE2; NIOBIUM
AB We report a pronounced peak effect in the magnetization of CoxNbSe2 single crystals with critical temperatures T-c ranging between 7.1 and 5.0 K, and MnxNbSe2 single crystals with critical temperatures down to 3.4 K. We correlate the peak effect in magnetization with the structure of the vortex lattice across the peak-effect region using scanning-tunneling microscopy. Magnetization measurements show that the amplitude of the peak effect in the case of CoxNbSe2 exhibits a nonmonotonic behavior as a function of the Co content, reaching a maximum for concentration of Co of about 0.4 at. % (corresponding to a T-c of 5.7 K) and after that gradually decreasing in amplitude with the increase in the Co content. The normalized value of the peak position H-p/H-c2 has weak dependence on Co concentration. In the case of MnxNbSe2 the features of the peak effect as a function of the Mn content are different and they can be understood in terms of strong pinning.
C1 [Iavarone, M.; Karapetrov, G.; Koshelev, A. E.; Rosenmann, D.; Claus, H.; Malliakas, C. D.; Kanatzidis, M. G.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Di Capua, R.] Univ Molise, Dipartimento S Pe S, I-86100 Campobasso, Italy.
[Di Capua, R.] CNR INFM COHERENTIA, I-80126 Naples, Italy.
[Malliakas, C. D.; Kanatzidis, M. G.] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
[Nishizaki, T.; Kobayashi, N.] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan.
RP Iavarone, M (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Kobayashi, Norio/C-1909-2009; Nishizaki, Terukazu/C-1500-2011; Koshelev,
Alexei/K-3971-2013; Karapetrov, Goran/C-2840-2008; Di Capua,
Roberto/G-9622-2012
OI Koshelev, Alexei/0000-0002-1167-5906; Karapetrov,
Goran/0000-0003-1113-0137; Di Capua, Roberto/0000-0003-3605-0993
FU U.S. Department of Energy Office of Science laboratory
[DE-AC02-06CH11357]
FX The authors would like to thank V Vinokur and A. Snezhko for useful
discussions. They also would like to acknowledge the partial support by
CNR under the short-term mobility program for researchers (R.D.C.) and
the support by the International Frontier Center for Advanced Materials
(IFCAM) at Tohoku University, Japan (M.I.). Financial support from
NSF-DMR is acknowledged (M.G.K.). This work, as well as the use of the
Center for Nanoscale Materials and the Electron Microscopy Center at
Argonne National Laboratory, was supported by UChicago Argonne, LLC,
operator of Argonne National Laboratory ("Argonne"). Argonne, a U.S.
Department of Energy Office of Science laboratory, is operated under
Contract No. DE-AC02-06CH11357.
NR 25
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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 NOV
PY 2008
VL 78
IS 17
AR 174518
DI 10.1103/PhysRevB.78.174518
PG 8
WC Physics, Condensed Matter
SC Physics
GA 376WU
UT WOS:000261214500086
ER
PT J
AU Jaroszynski, J
Hunte, F
Balicas, L
Jo, YJ
Raicevic, I
Gurevich, A
Larbalestier, DC
Balakirev, FF
Fang, L
Cheng, P
Jia, Y
Wen, HH
AF Jaroszynski, J.
Hunte, F.
Balicas, L.
Jo, Youn-jung
Raicevic, I.
Gurevich, A.
Larbalestier, D. C.
Balakirev, F. F.
Fang, L.
Cheng, P.
Jia, Y.
Wen, H. H.
TI Upper critical fields and thermally-activated transport of
NdFeAsO0.7F0.3 single crystal
SO PHYSICAL REVIEW B
LA English
DT Article
ID BASIC PHYSICAL-PROPERTIES; SUPERCONDUCTIVITY; MGB2; TEMPERATURE;
IMPURITIES; DEPENDENCE; SCATTERING; SPIN
AB We present detailed measurements of the longitudinal resistivity rho(xx)(T,H) and the upper critical field H-c2 of NdFeAsO0.7F0.3 single crystals in strong dc and pulsed magnetic fields up to 45 and 60 T, respectively. We found that the field scale of H-c2 is comparable to H-c2 similar to 100 T of high-T-c cuprates. H-c2(T) parallel to the c axis exhibits a pronounced upward curvature similar to what was extracted from earlier measurements on polycrystalline LaFeAs(O,F), NdFeAs(O,F), and SmFeAs(O,F) samples. Thus, this behavior of H-c2(perpendicular to)(T) is indeed an intrinsic feature of oxypnictides rather than manifestation of vortex lattice melting or granularity. The orientational dependence of H-c2(theta) as a function of the angle theta between H and the c axis shows deviations from the one-band Ginzburg-Landau scaling. The mass anisotropy parameter gamma(T)=(m(c)/m(ab))(1/2)=H-c2(parallel to)/H-c2(perpendicular to) obtained from these measurements decreases as temperature decreases from gamma similar or equal to 9.2 at 44 K to gamma similar or equal to 5 at 34 K, where parallel to and perpendicular to correspond to H parallel and perpendicular to the ab planes, respectively. Spin-dependent magnetoresistance and nonlinearities in the Hall coefficient suggest contribution to the conductivity from electron-electron interactions modified by disorder reminiscent of that in diluted magnetic semiconductors. The Ohmic resistivity rho(xx)(T,H) measured below T-c but above the irreversibility field exhibits a clear Arrhenius thermally-activated behavior rho=rho(0) exp[-E-a(T,H)/T] over 4-5 decades of rho(xx). The activation energy E-a(T,H) has very different field dependencies for H parallel to ab and H perpendicular to ab varying from 4x10(3) K at H=0.2 T to similar to 200 K at H=35 T. We discuss to what extent different pairing scenarios suggested in the literature can manifest themselves in the observed behavior of H-c2, using the two-band model of superconductivity in oxypnictides. The results indicate the importance of paramagnetic effects on H-c2(T) in oxypnictides, which may significantly reduce H-c2(0) as compared to H-c2(0)similar to 200-300 T based on extrapolations of H-c2(T) near T-c down to low temperatures.
C1 [Jaroszynski, J.; Hunte, F.; Balicas, L.; Jo, Youn-jung; Raicevic, I.; Gurevich, A.; Larbalestier, D. C.] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
[Balakirev, F. F.] Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA.
[Fang, L.; Cheng, P.; Jia, Y.; Wen, H. H.] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
RP Jaroszynski, J (reprint author), Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
RI Gurevich, Alex/A-4327-2008; Fang, Lei /K-2017-2013; CHENG,
PENG/D-4679-2015; Larbalestier, David/B-2277-2008
OI Gurevich, Alex/0000-0003-0759-8941; Larbalestier,
David/0000-0001-7098-7208
FU NSF [DMR-0084173]; State of Florida; DOE; NHMFL IHRP; AFOSR
[FA9550-06-1-0474]
FX The work at NHMFL was supported by the NSF under Cooperative Agreement
No. DMR-0084173, by the State of Florida, by the DOE, by the NHMFL IHRP
program (F.H.), and by the AFOSR under Grant No. FA9550-06-1-0474 (A.G.
and D.C.L.).
NR 63
TC 219
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U1 2
U2 26
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 NOV
PY 2008
VL 78
IS 17
AR 174523
DI 10.1103/PhysRevB.78.174523
PG 9
WC Physics, Condensed Matter
SC Physics
GA 376WU
UT WOS:000261214500091
ER
PT J
AU Kagimura, R
Singh, DJ
AF Kagimura, R.
Singh, D. J.
TI Ab initio study of Pb antisite defects in PbZrO3 and Pb(Zr,Ti)O-3
SO PHYSICAL REVIEW B
LA English
DT Article
ID CRYSTAL-STRUCTURE; THIN-FILMS; ANTIFERROELECTRIC PBZRO3; PEROVSKITE
STRUCTURE; NEUTRON-DIFFRACTION; PHASE-TRANSITION; LEAD; TEMPERATURE;
ENERGETICS; LATTICE
AB We report an ab initio study of Pb antisite defects in PbZrO3 (PZ) and Pb(Zr,Ti)O-3 (PZT) perovskites. Also, we calculated the enthalpy of formation of PZ. Our results show that, under strong oxidizing conditions, Pb on the Zr-site antisite defects are unavoidable in PZ. Moreover, a positive enthalpy of formation (0.15 eV) of PZ is found. This indicates that PZ is metastable for low temperature and may help explain the difficulty in synthesizing high-quality Zr-rich PZT crystals. The Pb antisite defects in PZT alloys have low formation energies. This result is in agreement with experiments, which report the predominance of this defect in PZT films. We find that the Pb antisite defect produces electron traps 0.2-0.8 eV below the conduction-band edge.
C1 [Kagimura, R.; Singh, D. J.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
[Kagimura, R.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RP Kagimura, R (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RI Singh, David/I-2416-2012
FU Department of Energy ORNL LDRD; Division of Materials Science and
Engineering; Office of Naval Research; Brazilian agency-CNPq (Conselho
Nacional de Desenvolvimento Cientifico a Tecnologico)
FX This work was supported by the Department of Energy ORNL LDRD program
and Division of Materials Science and Engineering, and by the Office of
Naval Research. One of the authors (R.K.) also was supported by the
Brazilian agency-CNPq (Conselho Nacional de Desenvolvimento Cientifico a
Tecnologico).
NR 32
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U1 2
U2 26
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 NOV
PY 2008
VL 78
IS 17
AR 174105
DI 10.1103/PhysRevB.78.174105
PG 5
WC Physics, Condensed Matter
SC Physics
GA 376WU
UT WOS:000261214500024
ER
PT J
AU Kalas, RM
Balatsky, AV
Mozyrsky, D
AF Kalas, Ryan M.
Balatsky, Alexander V.
Mozyrsky, Dmitry
TI Odd-frequency pairing in a binary mixture of bosonic and fermionic cold
atoms
SO PHYSICAL REVIEW B
LA English
DT Article
ID SINGLET SUPERCONDUCTORS; TRIPLET; PARITY; PHASE; MODEL
AB We study fermionic superfluidity in a boson-single-species-fermion cold-atom mixture. We argue that apart from the standard p-wave fermion pairing mediated by the phonon field of the boson gas, the system also exhibits s-wave pairing with the anomalous correlator being an odd function of time or frequency. We show that such a superfluid phase can have a much higher transition temperature than the p-wave and may exist for sufficiently strong couplings between fermions and bosons. These conditions for odd-frequency pairing are favorable close to the value of the coupling at which the mixture phase separates. We evaluate the critical temperatures for this system and discuss the experimental realization of this superfluid in ultracold atomic gases.
C1 [Kalas, Ryan M.; Balatsky, Alexander V.; Mozyrsky, Dmitry] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Kalas, RM (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM mozyrsky@lanl.gov
OI Mozyrsky, Dima/0000-0001-5305-4617
FU U.S. DOE
FX We thank E. Abrahams, I. Kolokolov, V. V. Lebedev, I. Martin, and E.
Timmermans for valuable discussions. The work is supported by the U.S.
DOE.
NR 20
TC 10
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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 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD NOV
PY 2008
VL 78
IS 18
AR 184513
DI 10.1103/PhysRevB.78.184513
PG 5
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800097
ER
PT J
AU Kim, YI
Cadars, S
Shayib, R
Proffen, T
Feigerle, CS
Chmelka, BF
Seshadri, R
AF Kim, Young-Il
Cadars, Sylvian
Shayib, Ramzy
Proffen, Thomas
Feigerle, Charles S.
Chmelka, Bradley F.
Seshadri, Ram
TI Local structures of polar wurtzites Zn1-xMgxO studied by Raman and
Zn-67/Mg-25 NMR spectroscopies and by total neutron scattering
SO PHYSICAL REVIEW B
LA English
DT Article
DE crystal structure; dielectric polarisation; magic angle spinning;
neutron diffraction; Raman spectra; zinc compounds
ID SOLID-STATE NMR; ZINC-OXIDE; ZNO; POLARIZATION; PARAMETERS; SPECTRA
AB Local compositions and structures of Zn1-xMgxO alloys have been investigated by Raman and solid-state Zn-67/Mg-25 nuclear-magnetic-resonance (NMR) spectroscopies and by neutron pair-distribution-function (PDF) analyses. The E-2(low) and E-2(high) Raman modes of Zn1-xMgxO display Gaussian- and Lorentzian-type profiles, respectively. At higher Mg substitutions, both modes become broader, while their peak positions shift in opposite directions. The evolution of Raman spectra from Zn1-xMgxO solid solutions is discussed in terms of lattice deformation associated with the distinct coordination preferences of Zn and Mg. Solid-state magic-angle-spinning (MAS) NMR studies suggest that the local electronic environments of Zn-67 in ZnO are only weakly modified by the 15% substitution of Mg for Zn. Mg-25 MAS spectra of Zn0.85Mg0.15O show an unusual upfield shift, demonstrating the prominent shielding ability of Zn in the nearby oxidic coordination sphere. Neutron PDF analyses of Zn0.875Mg0.125O using a 2x2x1 supercell corresponding to Zn7MgO8 suggest that the mean local geometry of MgO4 fragments concurs with previous density-functional-theory-based structural relaxations of hexagonal wurtzite MgO. MgO4 tetrahedra are markedly compressed along their c axes and are smaller in volume than ZnO4 units by approximate to 6%. Mg atoms in Zn1-xMgxO have a shorter bond to the c-axial oxygen atom than to the three lateral oxygen atoms, which is distinct from the coordination of Zn. The precise structure, both local and average, of Zn0.875Mg0.125O obtained from time-of-flight total neutron scattering supports the view that Mg substitution in ZnO results in increased total spontaneous polarization.
C1 [Kim, Young-Il; Seshadri, Ram] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA.
[Kim, Young-Il; Seshadri, Ram] Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA.
[Kim, Young-Il] Yeungnam Univ, Dept Chem, Gyongsan 712749, Gyeongbuk, South Korea.
[Cadars, Sylvian; Shayib, Ramzy; Chmelka, Bradley F.] Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA.
[Proffen, Thomas] Los Alamos Natl Lab, Manuel Lujan Jr Neutron Scattering Ctr, LANSCE 12, Los Alamos, NM 87545 USA.
[Feigerle, Charles S.] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
[Seshadri, Ram] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA.
RP Kim, YI (reprint author), Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA.
RI Cadars, Sylvian/B-4727-2012; Lujan Center, LANL/G-4896-2012; Seshadri,
Ram/C-4205-2013; Kim, Young-il/I-9322-2014; Proffen, Thomas/B-3585-2009;
Cadars, Sylvian/E-8604-2017
OI Seshadri, Ram/0000-0001-5858-4027; Kim, Young-il/0000-0003-2755-9587;
Proffen, Thomas/0000-0002-1408-6031;
FU National Science Foundation [DMR05-20415]; Department of Energy, Basic
Energy Sciences, Catalysis Science [DE-FG0203ER15467]; Office of Basic
Energy Sciences; DOE [DE-AC5206NA25396]
FX The authors acknowledge support from the National Science Foundation
through the MRSEC program (Grant No. DMR05-20415) and from the
Department of Energy, Basic Energy Sciences, Catalysis Science (Grant
No. DE-FG0203ER15467). This work has benefited from the use of NPDF at
the Lujan Center at Los Alamos Neutron Science Center, funded by Office
of Basic Energy Sciences, DOE. Los Alamos National Laboratory is
operated by Los Alamos National Security LLC under DOE Contract No.
DE-AC5206NA25396. The authors are grateful to the NSF-supported National
High Magnetic Field Laboratory in Tallahassee, Florida for access to the
high-field (19.6 T) NMR facilities and to Zhehong Gan for assistance
with the NMR measurements. Andrei Malashevich and David Vanderbilt
kindly provided the DFT optimized structural data for
Zn1-xMgxO supercells. The authors also thank Brent
Melot and Daniel Shoemaker for the neutron data collection.
NR 49
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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 NOV
PY 2008
VL 78
IS 19
AR 195205
DI 10.1103/PhysRevB.78.195205
PG 12
WC Physics, Condensed Matter
SC Physics
GA 396RC
UT WOS:000262607800054
ER
PT J
AU Koshelev, AE
AF Koshelev, A. E.
TI Alternating dynamic state self-generated by internal resonance in stacks
of intrinsic Josephson junctions
SO PHYSICAL REVIEW B
LA English
DT Article
ID TUNNEL-JUNCTIONS; SUPERCONDUCTORS; BI2SR2CACU2O8+DELTA; OSCILLATIONS
AB Intrinsic Josephson-junction stacks realized in high-temperature superconductors provide a very attractive base for developing coherent sources of electromagnetic radiation in the terahertz frequency range. A promising way to synchronize phase oscillations in all the junctions is to excite an internal cavity resonance. We demonstrate that this resonance promotes the formation of an alternating coherent state, in which the system spontaneously splits into two subsystems with different phase-oscillation patterns. There is a static phase shift between the oscillations in the two subsystems, which changes from 0 to 2 pi in a narrow region near the stack center. The oscillating electric and magnetic fields are almost homogeneous in all the junctions. The formation of this state promotes efficient pumping of the energy into the cavity resonance leading to strong resonance features in the current-voltage dependence.
C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Koshelev, AE (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Koshelev, Alexei/K-3971-2013
OI Koshelev, Alexei/0000-0002-1167-5906
FU US DOE, Office of Science [DE-AC02-06CH11357]
FX The author would like to thank U. Welp, L. Bulaevskii, K. Gray, M.
Tachiki, and X. Hu for useful discussions. This work was supported by
the US DOE, Office of Science under Contract No. DE-AC02-06CH11357.
NR 23
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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 NOV
PY 2008
VL 78
IS 17
AR 174509
DI 10.1103/PhysRevB.78.174509
PG 6
WC Physics, Condensed Matter
SC Physics
GA 376WU
UT WOS:000261214500077
ER
PT J
AU Kreyssig, A
Green, MA
Lee, Y
Samolyuk, GD
Zajdel, P
Lynn, JW
Bud'ko, SL
Torikachvili, MS
Ni, N
Nandi, S
Leao, JB
Poulton, SJ
Argyriou, DN
Harmon, BN
McQueeney, RJ
Canfield, PC
Goldman, AI
AF Kreyssig, A.
Green, M. A.
Lee, Y.
Samolyuk, G. D.
Zajdel, P.
Lynn, J. W.
Bud'ko, S. L.
Torikachvili, M. S.
Ni, N.
Nandi, S.
Leao, J. B.
Poulton, S. J.
Argyriou, D. N.
Harmon, B. N.
McQueeney, R. J.
Canfield, P. C.
Goldman, A. I.
TI Pressure-induced volume-collapsed tetragonal phase of CaFe2As2 as seen
via neutron scattering
SO PHYSICAL REVIEW B
LA English
DT Article
ID 43 K; SUPERCONDUCTIVITY; LAO1-XFXFEAS
AB Recent investigations of the superconducting iron-arsenide families have highlighted the role of pressure, be it chemical or mechanical, in fostering superconductivity. Here we report that CaFe2As2 undergoes a pressure-induced transition to a nonmagnetic volume "collapsed" tetragonal phase, which becomes superconducting at lower temperature. Spin-polarized total-energy calculations on the collapsed structure reveal that the magnetic Fe moment itself collapses, consistent with the absence of magnetic order in neutron diffraction.
C1 [Kreyssig, A.; Lee, Y.; Samolyuk, G. D.; Bud'ko, S. L.; Ni, N.; Nandi, S.; Harmon, B. N.; McQueeney, R. J.; Canfield, P. C.; Goldman, A. I.] US DOE, Ames Lab, Ames, IA 50011 USA.
[Kreyssig, A.; Lee, Y.; Samolyuk, G. D.; Bud'ko, S. L.; Ni, N.; Nandi, S.; Harmon, B. N.; McQueeney, R. J.; Canfield, P. C.; Goldman, A. I.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Green, M. A.; Zajdel, P.; Lynn, J. W.; Leao, J. B.; Poulton, S. J.] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[Green, M. A.; Poulton, S. J.] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA.
[Zajdel, P.] UCL, Dept Chem, London W1X 0AJ, England.
[Torikachvili, M. S.] San Diego State Univ, Dept Phys, San Diego, CA 92182 USA.
[Argyriou, D. N.] Helmholtz Zentrum Berlin Mat & Energie, D-14109 Berlin, Germany.
RP Kreyssig, A (reprint author), US DOE, Ames Lab, Ames, IA 50011 USA.
EM kreyssig@ameslab.gov
RI Zajdel, Pawel/B-7574-2013; Canfield, Paul/H-2698-2014; McQueeney,
Robert/A-2864-2016
OI Zajdel, Pawel/0000-0003-1220-5866; McQueeney, Robert/0000-0003-0718-5602
NR 31
TC 223
Z9 225
U1 5
U2 42
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 NOV
PY 2008
VL 78
IS 18
AR 184517
DI 10.1103/PhysRevB.78.184517
PG 6
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800101
ER
PT J
AU McQueeney, RJ
Yan, JQ
Chang, S
Ma, J
AF McQueeney, R. J.
Yan, J. -Q.
Chang, S.
Ma, J.
TI Determination of the exchange anisotropy in perovskite antiferromagnets
using powder inelastic neutron scattering
SO PHYSICAL REVIEW B
LA English
DT Article
AB A procedure is outlined for the determination of magnetic exchange constants in anisotropic perovskite anitferromagnets using powder inelastic neutron scattering. Spin-wave densities of states are measured using time-of-flight inelastic neutron scattering for LaMnO(3) (A-type antiferromagnet), LaVO(3) (C type), and LaFeO(3) (G type) and compared to Heisenberg model calculations. The anisotropy of in-plane (J(ab)) and out-of-plane (J(c)) exchange constants can be obtained from the data. The procedure quickly determines the magnetic exchange interactions without the need for single-crystal dispersion measurements and allows for rapid systematic studies of the evolution of magnetism in perovskite systems.
C1 [McQueeney, R. J.; Ma, J.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[McQueeney, R. J.; Yan, J. -Q.; Chang, S.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
RP McQueeney, RJ (reprint author), Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
RI Ma, Jie/C-1637-2013; McQueeney, Robert/A-2864-2016
OI McQueeney, Robert/0000-0003-0718-5602
FU U. S. Department of Energy Office of Science [DE-AC02-07CH11358]; Los
Alamos Neutron Science Center at Los Alamos National Laboratory; U. S.
Department of Energy [W-7405-ENG- 36]
FX R. J. M. would like to thank F. Trouw, A. Llobet, and M. Hehlen for
assistance with Pharos. Ames Laboratory is supported by the U. S.
Department of Energy Office of Science under Contract No.
DE-AC02-07CH11358. The work has benefited from the use of the Los Alamos
Neutron Science Center at Los Alamos National Laboratory. LANSCE is
funded by the U. S. Department of Energy under Contract No. W-7405-ENG-
36.
NR 14
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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 NOV
PY 2008
VL 78
IS 18
AR 184417
DI 10.1103/PhysRevB.78.184417
PG 8
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800063
ER
PT J
AU Paudyal, D
Mudryk, Y
Lee, YB
Pecharsky, VK
Gschneidner, KAJ
Harmon, BN
AF Paudyal, Durga
Mudryk, Ya.
Lee, Y. B.
Pecharsky, V. K.
Gschneidner, K. A. Jr. Jr
Harmon, B. N.
TI Understanding the extraordinary magnetoelastic behavior in GdNi
SO PHYSICAL REVIEW B
LA English
DT Article
ID NI INTERMETALLIC COMPOUNDS; GDNI1-XCUX COMPOUNDS; ELECTRONIC-STRUCTURE;
THERMAL-EXPANSION; CRYSTAL-STRUCTURE; SINGLE-CRYSTAL; RARE;
THERMODYNAMICS; TEMPERATURE; TRANSITION
AB Measurements as a function of both magnetic field and temperature along with first principles spin polarized calculations explain the remarkable magnetoelastic properties exhibited by GdNi below its Curie temperature. The lattice constants a and b elongate continuously by 0.35% and 0.49%, respectively, while the c axis contracts by 0.78%, all without phase volume change. Calculations and experiment confirm a relatively shallow magnetization-dependent energy landscape modified by the increased spin splitting of the conduction band as the 4f moments order.
C1 [Paudyal, Durga; Mudryk, Ya.; Lee, Y. B.; Pecharsky, V. K.; Gschneidner, K. A. Jr. Jr; Harmon, B. N.] Iowa State Univ, Ames Lab, USDOE, Ames, IA 50011 USA.
[Lee, Y. B.; Harmon, B. N.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Pecharsky, V. K.; Gschneidner, K. A. Jr. Jr] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
RP Pecharsky, VK (reprint author), Iowa State Univ, Ames Lab, USDOE, Ames, IA 50011 USA.
EM vitkp@ameslab.gov
FU Office of Basic Energy Sciences, Materials Sciences Division of the U.S.
Department of Energy [DE-AC02-07CH11358]; Iowa State University of
Science and Technology
FX This work was supported by the Office of Basic Energy Sciences,
Materials Sciences Division of the U.S. Department of Energy under
Contract No. DE-AC02-07CH11358 with Iowa State University of Science and
Technology.
NR 33
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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 NOV
PY 2008
VL 78
IS 18
AR 184436
DI 10.1103/PhysRevB.78.184436
PG 5
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800082
ER
PT J
AU Popescu, V
Bester, G
Hanna, MC
Norman, AG
Zunger, A
AF Popescu, Voicu
Bester, Gabriel
Hanna, Mark C.
Norman, Andrew G.
Zunger, Alex
TI Theoretical and experimental examination of the intermediate-band
concept for strain-balanced (In,Ga)As/Ga(As,P) quantum dot solar cells
SO PHYSICAL REVIEW B
LA English
DT Article
ID ORIENTED SEMICONDUCTOR HETEROSTRUCTURES; INFRARED PHOTODETECTORS;
PIEZOELECTRIC FIELDS; ELECTRONIC-STRUCTURE; CHEMICAL TRENDS;
TRANSITIONS; PHOTOCURRENT; COEFFICIENTS; ABSORPTION; EFFICIENCY
AB The intermediate-band solar cell (IBSC) concept has been recently proposed to enhance the current gain from the solar spectrum whilst maintaining a large open-circuit voltage. Its main idea is to introduce a partially occupied intermediate band (IB) between the valence band (VB) and conduction band (CB) of the semiconductor absorber, thereby increasing the photocurrent by the additional VB -> IB and IB -> CB absorptions. The confined electron levels of self-assembled quantum dots (QDs) were proposed as potential candidates for the implementation of such an IB. Here we report experimental and theoretical investigations on In(y)Ga(1-y)As dots in a GaAs(1-x)P(x) matrix, examining its suitability for acting as IBSCs. The system has the advantage of allowing strain symmetrization within the structure, thus enabling the growth of a large number of defect-free QD layers, despite the significant size mismatch between the dot material and the surrounding matrix. We examine the various conditions related to the optimum functionality of the IBSC, in particular those connected to the optical and electronic properties of the system. We find that the intensity of absorption between QD-confined electron states and host CB is weak because of their localized-to-delocalized character. Regarding the position of the IB within the matrix band gap, we find that, whereas strain symmetrization can indeed permit growth of multiple dot layers, the current repertoire of GaAs(1-x)P(x) barrier materials, as well as In(y)Ga(1-y)As dot materials, does not satisfy the ideal energetic locations for the IB. We conclude that other QD systems must be considered for QD-IBSC implementations.
C1 [Popescu, Voicu; Bester, Gabriel; Hanna, Mark C.; Norman, Andrew G.; Zunger, Alex] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Popescu, V (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
RI Norman, Andrew/F-1859-2010; Popescu, Voicu/A-9130-2010; Bester,
Gabriel/I-4414-2012; Zunger, Alex/A-6733-2013
OI Norman, Andrew/0000-0001-6368-521X; Bester, Gabriel/0000-0003-2304-0817;
FU U.S. Department of Energy [DE-AC36-99GO10337]
FX The work of V. P., M. C. H., and A.G.N. was funded by the U.S.
Department of Energy through NREL's Laboratory Directed Research and
Development program. The collaboration with A.Z. and G. B. was funded by
the U. S. Department of Energy Office of Science, Basic Energy Science,
under Contract No. DE-AC36-99GO10337 to NREL. The authors gratefully
acknowledge P. Dippo for the room-temperature PL measurements, L. M.
Gedvilas for the FTIR measurements, and J.S. Ward for device processing.
NR 55
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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 NOV
PY 2008
VL 78
IS 20
AR 205321
DI 10.1103/PhysRevB.78.205321
PG 17
WC Physics, Condensed Matter
SC Physics
GA 376XD
UT WOS:000261215400060
ER
PT J
AU Qu, Z
Spinu, L
Yuan, HQ
Dobrosavljevic, V
Bao, W
Lynn, JW
Nicklas, M
Peng, J
Liu, TJ
Fobes, D
Flesch, E
Mao, ZQ
AF Qu, Zhe
Spinu, Leonard
Yuan, Huiqiu
Dobrosavljevic, Vladimir
Bao, Wei
Lynn, Jeffrey W.
Nicklas, M.
Peng, Jin
Liu, Tijiang
Fobes, David
Flesch, Etienne
Mao, Z. Q.
TI Unusual heavy-mass nearly ferromagnetic state with a surprisingly large
Wilson ratio in the double layered ruthenates (Sr(1-x)Ca(x))(3)Ru(2)O(7)
SO PHYSICAL REVIEW B
LA English
DT Article
ID SR3RU2O7; TRANSITION; METAL; INSULATOR; PHASE
AB We report an unusual nearly ferromagnetic heavy-mass state with a surprisingly large Wilson ratio R(w) (e.g., R(w) similar to 700 for x=0.2) in double layered ruthenates (Sr(1-x)Ca(x))(3)Ru(2)O(7) with 0.08 < x < 0.4. This state does not evolve into a long-range ferromagnetically ordered state despite considerably strong ferromagnetic correlations, but it freezes into a cluster-spin glass at low temperatures. In addition, evidence of non-Fermi-liquid behavior is observed as the spin-freezing temperature of the cluster-spin glass approaches zero near x approximate to 0.1. We discuss the origin of this unique magnetic state from the Fermi-surface information probed by Hall-effect measurements.
C1 [Qu, Zhe; Peng, Jin; Liu, Tijiang; Fobes, David; Flesch, Etienne; Mao, Z. Q.] Tulane Univ, Dept Phys, New Orleans, LA 70118 USA.
[Spinu, Leonard] Univ New Orleans, Dept Phys, New Orleans, LA 70148 USA.
[Spinu, Leonard] Univ New Orleans, AMRI, New Orleans, LA 70148 USA.
[Yuan, Huiqiu] Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA.
[Dobrosavljevic, Vladimir] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA.
[Dobrosavljevic, Vladimir] Florida State Univ, NHMFL, Tallahassee, FL 32306 USA.
[Lynn, Jeffrey W.] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[Nicklas, M.] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany.
RP Qu, Z (reprint author), Tulane Univ, Dept Phys, New Orleans, LA 70118 USA.
EM zmao@tulane.edu
RI Qu, Zhe/H-6406-2011; Bao, Wei/E-9988-2011; LIU, TIJIANG/A-3242-2013;
Nicklas, Michael/B-6344-2008; Fobes, David/E-8526-2014
OI Qu, Zhe/0000-0003-3865-8337; Bao, Wei/0000-0002-2105-461X; Nicklas,
Michael/0000-0001-6272-2162; Fobes, David/0000-0001-8252-2061
FU NSF [DMR-0645305, DMR-0542026]; DOE [DE-FG02-07ER46358]; ARO
[W911NF-08-C-0131]; Research Corporation; DARPA [HR0011-07-1-0031]
FX We thank C. M. Varma, I. Vekhter, A. V. Balatsky, M. J. Case, Z. Islam,
and Y. Liu for useful discussions. Work at Tulane by the NSF under Grant
No. DMR-0645305, the DOE under Grant No. DE-FG02-07ER46358, the ARO
under Grant No. W911NF-08-C-0131, and the Research Corporation. Work at
UNO is supported by DARPA under Contract No. HR0011-07-1-0031; work in
Florida is supported by the NSF under Contract No. DMR-0542026; and work
at LANL is supported by the NSF, DOE, and the State of Florida. H. Y.
also acknowledges support from I2CAM and the kind hospitality of
MPI-CPFS.
NR 27
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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 NOV
PY 2008
VL 78
IS 18
AR 180407
DI 10.1103/PhysRevB.78.180407
PG 4
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800009
ER
PT J
AU Ramos, AV
Santos, TS
Miao, GX
Guittet, MJ
Moussy, JB
Moodera, JS
AF Ramos, A. V.
Santos, T. S.
Miao, G. X.
Guittet, M. -J.
Moussy, J. -B.
Moodera, J. S.
TI Influence of oxidation on the spin-filtering properties of CoFe(2)O(4)
and the resultant spin polarization
SO PHYSICAL REVIEW B
LA English
DT Article
ID TUNNEL-JUNCTIONS; LARGE MAGNETORESISTANCE; BARRIERS; FIELD; ZERO
AB We report the direct measurement of spin polarization in epitaxial CoFe(2)O(4) tunnel barriers using the Meservey-Tedrow technique. By observing an asymmetry in the Al quasiparticle density of states in Pt(111)/CoFe(2)O(4)(111)/gamma-Al(2)O(3)(111)/Al tunnel junctions, we prove the existence of spin filtering in our CoFe(2)O(4) tunnel barriers. We further analyze the effect of oxidation conditions during film growth on the polarization of the tunneling current, revealing an important role played by oxygen vacancies in the spin-filter efficiency of this material.
C1 [Ramos, A. V.; Guittet, M. -J.; Moussy, J. -B.] CEA Saclay, IRAMIS, SPCSI, F-91191 Gif Sur Yvette, France.
[Santos, T. S.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Santos, T. S.; Miao, G. X.; Moodera, J. S.] MIT, Francis Bitter Natl Magnet Lab, Cambridge, MA 02139 USA.
RP Ramos, AV (reprint author), CEA Saclay, IRAMIS, SPCSI, F-91191 Gif Sur Yvette, France.
RI Miao, Guo-Xing/A-2411-2008
OI Miao, Guo-Xing/0000-0002-8735-8077
FU NSF; ONR; MIT-France
FX We wish to thank M. Gautier-Soyer for valuable discussions. We also
acknowledge C. Deranlot for the growth of the Pt buffer layers. This
work at MIT was supported by NSF and ONR grants as well as by the
MIT-France program.
NR 23
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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 NOV
PY 2008
VL 78
IS 18
AR 180402
DI 10.1103/PhysRevB.78.180402
PG 4
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800004
ER
PT J
AU Reichhardt, C
Reichhardt, CJO
AF Reichhardt, C.
Reichhardt, C. J. Olson
TI Transverse commensurability effect for vortices in periodic pinning
arrays
SO PHYSICAL REVIEW B
LA English
DT Article
ID DRIVEN VORTEX LATTICES; SUPERCONDUCTING FILMS; REGULAR ARRAY; DYNAMICS;
DEFECTS; STATES; PHASE
AB Using computer simulations, we demonstrate a type of commensurability that occurs for vortices moving longitudinally through periodic pinning arrays in the presence of an additional transverse driving force. As a function of vortex density, there is a series of broad maxima in the transverse critical depinning force that do not fall at the matching fields where the number of vortices equals an integer multiple of the number of pinning sites. The commensurability effects are associated with dynamical states in which evenly spaced structures consisting of one or more moving rows of vortices form between rows of pinning sites. Remarkably, the critical transverse depinning force can be more than an order of magnitude larger than the longitudinal depinning force.
C1 [Reichhardt, C.; Reichhardt, C. J. Olson] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Reichhardt, C (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
OI Reichhardt, Cynthia/0000-0002-3487-5089
FU U. S. DOE at LANL [DE-AC5206NA25396]
FX This work was carried out under the auspices of the NNSA of the U. S.
DOE at LANL under Contract No. DE-AC5206NA25396.
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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 NOV
PY 2008
VL 78
IS 18
AR 180507
DI 10.1103/PhysRevB.78.180507
PG 4
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800024
ER
PT J
AU Rivin, O
Osborn, R
Kolesnikov, AI
Caspi, EN
Shaked, H
AF Rivin, Oleg
Osborn, Raymond
Kolesnikov, Alexander I.
Caspi, El'ad N.
Shaked, Hagai
TI Tb(3+) in TbCo(3)B(2): A singlet ground state system studied by
inelastic neutron scattering
SO PHYSICAL REVIEW B
LA English
DT Article
ID FIELD
AB The results of inelastic neutron scattering on the hexagonal compounds TbCo(3)B(2) and Tb(0.75)Y(0.25)Co(3)B(2), at several temperatures, are reported. The crystal-field level scheme of Tb(3+) ions in the paramagnetic phase is determined. This scheme contains a nonmagnetic singlet (Gamma 1) as the ground state. Inelastic neutron scattering at low temperature (10 K) leads to a different energy-level scheme, where the singlet ground state is ferromagnetic with < J(x)> not equal 0. This is a "self-induced" ferromagnetism on the Tb sublattice, resulting from the admixture of higher crystal-field levels into the singlet ground state by the exchange field. The resulting magnitudes of these ground state magnetic moments are 5.6(3)mu(B) and 3(1)mu(B) for TbCo(3)B(2) and Tb(0.75)Y(0.25)Co(3)B(2), respectively. These values are much smaller than the free ion value of 9 mu(B) and are in agreement with previously observed values. Such large reductions are characteristic of the "self-induced" ferromagnetism. The temperature dependences of the magnetic moment, magnetic anisotropy, Tb sublattice dilution, and magnetic susceptibility are discussed.
C1 [Rivin, Oleg; Caspi, El'ad N.] Nucl Res Ctr Negev, Dept Phys, IL-84190 Beer Sheva, Israel.
[Rivin, Oleg; Shaked, Hagai] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel.
[Osborn, Raymond] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Kolesnikov, Alexander I.] Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA.
[Kolesnikov, Alexander I.] Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA.
RP Rivin, O (reprint author), Nucl Res Ctr Negev, Dept Phys, POB 9001, IL-84190 Beer Sheva, Israel.
EM olegr@nrcn.org.il
RI Osborn, Raymond/E-8676-2011; Kolesnikov, Alexander/I-9015-2012
OI Osborn, Raymond/0000-0001-9565-3140; Kolesnikov,
Alexander/0000-0003-1940-4649
FU U. S. Department of Energy [DE-AC02-06CH11357, DE-AC05-00OR22725]
FX This work is based on an experiment No. 5385, performed at the Intense
Pulsed Neutron Source, Argonne National Laboratory, Argonne, IL, USA.
ANL is managed by UChicago Argonne, LLC, for the U. S. Department of
Energy under Contract No. DE-AC02-06CH11357. One of us (A. I. K.) wishes
to acknowledge ORNL/SNS which is managed by UT-Battelle, LLC, for the U.
S. Department of Energy under Contract No. DE-AC05-00OR22725. The
authors wish to thank Lynnete Jirik and Kristina Verdal for their
assistance in conducting the experiment.
NR 17
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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 NOV
PY 2008
VL 78
IS 18
AR 184424
DI 10.1103/PhysRevB.78.184424
PG 6
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800070
ER
PT J
AU Rybicki, D
Kapusta, C
Tokarz, W
Stepankova, H
Prochazka, V
Haase, J
Jirak, Z
Adroja, DT
Mitchell, JF
AF Rybicki, D.
Kapusta, Cz.
Tokarz, W.
Stepankova, H.
Prochazka, V.
Haase, J.
Jirak, Z.
Adroja, D. T.
Mitchell, J. F.
TI Mn-55 nuclear magnetic resonance study of highly Sr-doped
La2-2xSr1+2xMn2O7 (x=0.5-0.8)
SO PHYSICAL REVIEW B
LA English
DT Article
ID ELECTRONIC PHASE-SEPARATION; COLOSSAL MAGNETORESISTANCE; SPIN
INTERACTIONS; MANGANITES; NMR; CHARGE; RELAXATION; LA0.5CA0.5MNO3;
LA1-XCAXMNO3; SEGREGATION
AB The Mn-55 nuclear magnetic resonance (NMR) study of bilayered perovskites La2-2xSr1+2xMn2O7 with 0.5 <= x <= 1 is presented. The 55Mn spin-echo spectra were measured at 4.2 K at zero applied magnetic field and at fields up to 2.5 T. Recent neutron-diffraction studies report that all the compounds studied are antiferromagnetically ordered (except x=0.68 in which no long-range magnetic order was found [Mitchell et al., J. Phys. Chem. B 105, 10731 (2001)]. However, within the doping range 0.62 <= x <= 0.68, apart from NMR signal from antiferromagnetic insulating (AFI) phase, also lines from ferromagnetic insulating (FMI) and ferromagnetic metallic (FMM) phases are observed. This indicates that phase separation occurs in high Sr-doped bilayered manganites. The amount of the FMI and FMM regions decreases with the Sr doping level and for compounds with x=0.75 and x=0.8; only the line originating from nuclei in Mn4+ cations in AFI regions is observed.
C1 [Rybicki, D.; Kapusta, Cz.; Tokarz, W.] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Dept Solid State Phys, Al Mickiewicza 30, PL-30059 Krakow, Poland.
[Rybicki, D.; Haase, J.] Univ Leipzig, Fac Phys & Earth Sci, D-04103 Leipzig, Germany.
[Stepankova, H.; Prochazka, V.] Charles Univ Prague, Fac Math & Phys, Dept Low Temp Phys, CR-18000 Prague 8, Czech Republic.
[Jirak, Z.] Inst Phys, Prague 16253 6, Czech Republic.
[Adroja, D. T.] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
[Mitchell, J. F.] Argonne Natl Lab, Div Mat Sci, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Rybicki, D (reprint author), AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Dept Solid State Phys, Al Mickiewicza 30, PL-30059 Krakow, Poland.
RI Jirak, Zdenek/G-6281-2014
FU EU [NMP4-CT-2005- 517039]; Grant Agency of Czech Republic [202/06/0051];
Polish Ministry of Science and Higher Education
FX Financial supports by the EU grant under Contract No. NMP4-CT-2005-
517039 (CoMePhS), the Grant Agency of Czech Republic under Project No.
202/06/0051, and partial support of the Polish Ministry of Science and
Higher Education are acknowledged.
NR 51
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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 NOV
PY 2008
VL 78
IS 18
AR 184428
DI 10.1103/PhysRevB.78.184428
PG 8
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800074
ER
PT J
AU Sakiyama, N
Zaliznyak, A
Lee, SH
Mitsui, Y
Yoshizawa, H
AF Sakiyama, N.
Zaliznyak, A.
Lee, S. -H.
Mitsui, Y.
Yoshizawa, H.
TI Doping-dependent charge and spin superstructures in layered cobalt
perovskites
SO PHYSICAL REVIEW B
LA English
DT Article
ID HIGH-TEMPERATURE SUPERCONDUCTORS; ELECTRONIC PHASE-SEPARATION; STRIPES;
LA2-XSRXCUO4; POLARONS; ORDER; MODEL; HOLES
AB We have investigated cobaltite relatives of the layered perovskite cuprates and nickelates, Pr(2-x)Ca(x)CoO(4) (0.39 <= x <= 0.73) and La(2-x)Sr(x)CoO(4) (x=0.4, 0.61), using elastic neutron scattering. We have discovered doping-dependent incommensurate short-range ordering of charges and magnetic moments, which in cobaltites occur in the nonitinerant polaron phase, for 0.5 <= x <= 0.75. The charge order exists already at room temperature and shows no change on cooling. The incommensurability of its propagation vector, Q(c)=(epsilon(c), 0, l), roughly scales with the concentration of Co(2+) ions, epsilon(c) similar to (1-x). Magnetic order follows at low T less than or similar to 40 K and has twice larger periodicity, indicating a dominant antiferromagnetic correlation between the nearest Co(2+) spins.
C1 [Zaliznyak, A.] Brookhaven Natl Lab, DCMPMS, Upton, NY 11973 USA.
[Sakiyama, N.; Mitsui, Y.; Yoshizawa, H.] Univ Tokyo, Inst Solid State Phys, Neutron Sci Lab, Tokai, Ibaraki 3191106, Japan.
[Lee, S. -H.] Univ Virginia, Dept Phys, Charlottesville, VA 22904 USA.
RP Zaliznyak, A (reprint author), Brookhaven Natl Lab, DCMPMS, Upton, NY 11973 USA.
EM zaliznyak@bnl.gov
RI Zaliznyak, Igor/E-8532-2014
OI Zaliznyak, Igor/0000-0002-9886-3255
FU Ministry of Education, Culture, Sports, Science, and Technology, Japan
[16540307]; U.S. DOE [DE-AC02-98CH10886]
FX We thank T. J. Sato and K. Hirota for help with experiments and J.
Tranquada for discussions. This work was supported by Grants-In-Aid for
Scientific Research (C) (Grant No. 16540307) from the Ministry of
Education, Culture, Sports, Science, and Technology, Japan, and by the
U. S. DOE under Contract No. DE-AC02-98CH10886.
NR 27
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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 NOV
PY 2008
VL 78
IS 18
AR 180406
DI 10.1103/PhysRevB.78.180406
PG 4
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800008
ER
PT J
AU Sirenko, AA
O'Malley, SM
Ahn, KH
Park, S
Carr, GL
Cheong, SW
AF Sirenko, A. A.
O'Malley, S. M.
Ahn, K. H.
Park, S.
Carr, G. L.
Cheong, S-W.
TI Infrared-active excitations related to Ho(3+) ligand-field splitting at
the commensurate-incommensurate magnetic phase transition in HoMn(2)O(5)
SO PHYSICAL REVIEW B
LA English
DT Article
AB Linearly polarized spectra of far-infrared (IR) transmission in HoMn(2)O(5) multiferroic single crystals have been studied in the frequency range between 8.5 and 105 cm(-1) and for temperatures between 5 and 300 K. Polarization of IR-active excitations depends on the crystallographic directions in HoMn(2)O(5) and is sensitive to the magnetic phase transitions. We attribute some of the infrared-active excitations to electric-dipole transitions between ligand-field (LF) split states of Ho(3+) ions. For light polarization along crystalline b axis, the oscillator strength of electric dipoles at low frequencies (10.5, 13, and 18 cm(-1)) changes significantly at the commensurate-incommensurate antiferromagnetic phase transition at T(3)=19 K. This effect shows a strong correlation with the pronounced steps of the b-directional static dielectric function. We propose that the LF on Ho(3+) connects the magnetism and dielectric properties of this compound through coupling with the Mn spin structure. We comment on the possibility for composite excitations of magnons and excited LF states.
C1 [Sirenko, A. A.; O'Malley, S. M.; Ahn, K. H.] New Jersey Inst Technol, Dept Phys, Newark, NJ 07102 USA.
[Park, S.; Cheong, S-W.] Rutgers State Univ, Rutgers Ctr Emergent Mat, Piscataway, NJ 08854 USA.
[Park, S.; Cheong, S-W.] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
[Carr, G. L.] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
RP Sirenko, AA (reprint author), New Jersey Inst Technol, Dept Phys, Newark, NJ 07102 USA.
EM sirenko@njit.edu
NR 20
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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 NOV
PY 2008
VL 78
IS 17
AR 174405
DI 10.1103/PhysRevB.78.174405
PG 8
WC Physics, Condensed Matter
SC Physics
GA 376WU
UT WOS:000261214500044
ER
PT J
AU Souvatzis, P
Rudin, SP
AF Souvatzis, P.
Rudin, S. P.
TI Dynamical stabilization of cubic ZrO(2) by phonon-phonon interactions:
Ab initio calculations
SO PHYSICAL REVIEW B
LA English
DT Article
ID FUNCTIONAL PERTURBATION-THEORY; TOTAL-ENERGY CALCULATIONS;
FORCE-CONSTANTS; THERMAL-EXPANSION; DISPERSIONS; METALS; PHASE; CORE
AB Cubic zirconia exhibits a soft phonon mode (X(2)(-)) which becomes dynamically unstable at low temperatures. Previous ab initio investigations into the temperature-induced stabilization of the soft mode treated it as an independent anharmonic oscillator. Calculations presented here, using the self-consistent ab initio lattice-dynamical method to evaluate the phonons at 2570 K, show that the soft mode should not be treated independently of other phonon modes. Phonon-phonon interactions stabilize the X(2)(-) mode. Furthermore, the effective potential experienced by the mode takes on a quadratic form.
C1 [Souvatzis, P.; Rudin, S. P.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Souvatzis, P (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
FU Department of Energy [AC52-06NA25396]; Alexander Mavromaras of Materials
Design
FX The Department of Energy supported this work under Contract No.
DE-AC52-06NA25396. We also want to acknowledge our appreciation to
Alexander Mavromaras of Materials Design for suggesting cubic zirconia
as an interesting material to study, and Olle Eriksson at Uppsala
University for providing computer resources. We thank Eric Chisolm for
helpful discussions.
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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 NOV
PY 2008
VL 78
IS 18
AR 184304
DI 10.1103/PhysRevB.78.184304
PG 6
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800045
ER
PT J
AU Telling, ND
Keatley, PS
van der Laan, G
Hicken, RJ
Arenholz, E
Sakuraba, Y
Oogane, M
Ando, Y
Takanashi, K
Sakuma, A
Miyazaki, T
AF Telling, N. D.
Keatley, P. S.
van der Laan, G.
Hicken, R. J.
Arenholz, E.
Sakuraba, Y.
Oogane, M.
Ando, Y.
Takanashi, K.
Sakuma, A.
Miyazaki, T.
TI Evidence of local moment formation in Co-based Heusler alloys
SO PHYSICAL REVIEW B
LA English
DT Article
ID MAGNETIC CIRCULAR-DICHROISM; ABSORPTION-SPECTRA
AB We examine the formation of local moments in Heusler alloys of the composition Co(2)MnZ (where Z=Si or Al) using the combined techniques of x-ray magnetic circular and linear dichroism. The existence of local moments in half-metallic Heusler alloys is reliant upon the band gap in the minority-spin states. By utilizing the element-specific nature of x-ray absorption techniques we are able to explore the degree of localization of moments on Co and Mn atoms. We observe a crucial difference in the localization of the Co moment when comparing Co2MnSi (CMS) and Co2MnAl films that is consistent with the predicted larger minority-spin gap in the Co partial density of states for CMS. These results provide important evidence for the dominant role of the Co minority-spin states in realizing half-metallic ferromagnetism in this system.
C1 [Telling, N. D.] Univ Manchester, Sch Earth Atmospher & Environm Sci, Manchester M13 9P, Lancs, England.
[Telling, N. D.; van der Laan, G.] STFC, Daresbury Lab, Magnet Spect Grp, Warrington WA4 4AD, Cheshire, England.
[Keatley, P. S.; Hicken, R. J.] Univ Exeter, Sch Phys, Exeter EX4 4QL, Devon, England.
[van der Laan, G.] Diamond Light Source, Didcot OX11 0DE, Oxon, England.
[Arenholz, E.] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
[Sakuraba, Y.; Takanashi, K.] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan.
[Oogane, M.; Ando, Y.; Sakuma, A.; Miyazaki, T.] Tohoku Univ, Grad Sch Engn, Dept Appl Phys, Sendai, Miyagi 9808579, Japan.
RP Telling, ND (reprint author), Univ Manchester, Sch Earth Atmospher & Environm Sci, Oxford Rd, Manchester M13 9P, Lancs, England.
RI Sakuraba, Yuya/C-1902-2009; Miyazaki, Terunobu/E-5068-2010; Takanashi,
Koki/A-9488-2011; van der Laan, Gerrit/Q-1662-2015;
OI van der Laan, Gerrit/0000-0001-6852-2495; Keatley,
Paul/0000-0002-7679-6418
FU Office of Science, Office of Basic Energy Sciences, of the U.S.
Department of Energy [DE-AC0205CH11231]; New Energy and Industrial
Development Organization (NEDO); Japan Society for the Promotion of
Science (JSPS)
FX 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. A part of this work was
supported by the Grant Program of the New Energy and Industrial
Development Organization (NEDO) and by a Research Foundation for Young
Scientists from the Japan Society for the Promotion of Science (JSPS)
NR 31
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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 NOV
PY 2008
VL 78
IS 18
AR 184438
DI 10.1103/PhysRevB.78.184438
PG 7
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800084
ER
PT J
AU Tian, W
Li, JY
Lynn, JW
Zarestky, JL
Vaknin, D
AF Tian, Wei
Li, Jiying
Lynn, Jeffrey W.
Zarestky, Jerel L.
Vaknin, David
TI Spin dynamics in the magnetoelectric effect compound LiCoPO(4)
SO PHYSICAL REVIEW B
LA English
DT Article
ID POLARIZATION ANALYSIS; MAGNETIC PROPERTIES; LINIPO4; ANTIFERROMAGNETISM;
SCATTERING; MECHANISM; CRYSTAL
AB Inelastic neutron-scattering (INS) experiments were performed to investigate the spin dynamics in magnetoelectric effect LiCoPO(4) single crystals. Weak dispersion was detected in the magnetic excitation spectra along the three principal crystallographic axes measured around the (0 1 0) magnetic reflection. Analysis of the data using linear spin-wave theory indicates that single-ion anisotropy in LiCoPO(4) is as important as the strongest nearest-neighbor exchange coupling. Our results suggest that Co(2+) single-ion anisotropy plays an important role in the spin dynamics of LiCoPO(4) and must be taken into account in understanding its physical properties. High-resolution INS measurements reveal an anomalous low-energy excitation that we hypothesize may be related to the magnetoelectric effect of LiCoPO(4).
C1 [Tian, Wei; Zarestky, Jerel L.; Vaknin, David] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
[Tian, Wei; Zarestky, Jerel L.; Vaknin, David] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Li, Jiying; Lynn, Jeffrey W.] NIST, NCNR, Gaithersburg, MD 20899 USA.
[Li, Jiying] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA.
RP Tian, W (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
RI Tian, Wei/C-8604-2013; Vaknin, David/B-3302-2009
OI Tian, Wei/0000-0001-7735-3187; Vaknin, David/0000-0002-0899-9248
FU U. S. Department of Energy, Office of Basic Energy Science
[DE-AC0207CH11358]; U. S. Department of Energy, Office of Basic Energy
Sciences, Materials Science [AC0500OR22725]; National Science Foundation
[DMR-0454672]; National Institute of Standards Technology
FX We acknowledge discussions with T. Barnes. Ames Laboratory was supported
by the U. S. Department of Energy, Office of Basic Energy Science under
Contract No. DE-AC0207CH11358. The HFIR is a national user facility
funded by the U. S. Department of Energy, Office of Basic Energy
Sciences, Materials Science under Contract No. DE-AC0500OR22725 with
UT-Battelle, LLC. SPINS was supported in part by the National Science
Foundation through Grant No. DMR-0454672. The work has benefited from
the use of the NIST Center of Neutron Research at the National Institute
of Standards Technology.
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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 NOV
PY 2008
VL 78
IS 18
AR 184429
DI 10.1103/PhysRevB.78.184429
PG 6
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800075
ER
PT J
AU Tranquada, JM
Gu, GD
Hucker, M
Jie, Q
Kang, HJ
Klingeler, R
Li, Q
Tristan, N
Wen, JS
Xu, GY
Xu, ZJ
Zhou, J
van Zimmermann, M
AF Tranquada, J. M.
Gu, G. D.
Huecker, M.
Jie, Q.
Kang, H. -J.
Klingeler, R.
Li, Q.
Tristan, N.
Wen, J. S.
Xu, G. Y.
Xu, Z. J.
Zhou, J.
v. Zimmermann, M.
TI Evidence for unusual superconducting correlations coexisting with stripe
order in La1.875Ba0.125CuO4
SO PHYSICAL REVIEW B
LA English
DT Article
ID HIGH-TEMPERATURE SUPERCONDUCTIVITY; COPPER-OXIDE SUPERCONDUCTORS; T-C
SUPERCONDUCTORS; CUPRATE SUPERCONDUCTORS; TRANSPORT-PROPERTIES;
QUASI-PARTICLE; FERMI-SURFACE; DOPED ANTIFERROMAGNETS; STRUCTURAL
TRANSITIONS; THERMAL-CONDUCTIVITY
AB We present new x-ray and neutron-scattering measurements of stripe order in La1.875Ba0.125CuO4, along with low-field susceptibility, thermal conductivity, and specific-heat data. We compare these with previously reported results for resistivity and thermopower. Temperature-dependent features indicating transitions (or crossovers) are correlated among the various experimental quantities. Taking into account recent spectroscopic studies, we argue that the most likely interpretation of the complete collection of results is that an unusual form of two-dimensional superconducting correlations appears together with the onset of spin-stripe order. Recent theoretical proposals for a sinusoidally modulated superconducting state compatible with stripe order provide an intriguing explanation of our results and motivate further experimental tests. We also discuss evidence for one-dimensional pairing correlations that appear together with the charge order. With regard to the overall phenomenology, we consider the degree to which similar behavior may have been observed in other cuprates and describe possible connections to various puzzling phenomena in cuprate superconductors.
C1 [Tranquada, J. M.; Gu, G. D.; Huecker, M.; Jie, Q.; Li, Q.; Wen, J. S.; Xu, G. Y.; Xu, Z. J.; Zhou, J.] Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA.
[Kang, H. -J.] NIST, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[Klingeler, R.; Tristan, N.] IFW Dresden, Leibniz Inst Solid State & Mat Res, D-01171 Dresden, Germany.
[v. Zimmermann, M.] Deutsch Elektronensynchrotron DESY, Hamburger Synchrotronstrahlungslab HASYLAB, D-22603 Hamburg, Germany.
RP Tranquada, JM (reprint author), Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA.
RI Tranquada, John/A-9832-2009; Wen, Jinsheng/F-4209-2010; Xu,
Guangyong/A-8707-2010; Jie, Qing/H-3780-2011; xu, zhijun/A-3264-2013;
Gu, Genda/D-5410-2013; Klingeler, Rudiger/E-5941-2010; Jie,
Qing/N-8673-2013
OI Tranquada, John/0000-0003-4984-8857; Wen, Jinsheng/0000-0001-5864-1466;
Xu, Guangyong/0000-0003-1441-8275; xu, zhijun/0000-0001-7486-2015; Gu,
Genda/0000-0002-9886-3255; Klingeler, Rudiger/0000-0002-8816-9614;
FU National Institute of Standards and Technology; Office of Science, U.S.
Department of Energy [DEAC02-98CH10886]
FX We are grateful to S. A. Kivelson, E. Fradkin, V Oganesyan, T. M. Rice,
M. Strongin, and A. Tsvelik for valuable discussions. We acknowledge the
support of the National Institute of Standards and Technology, U.S.
Department of Commerce, in providing the neutron research facilities
used in this work. This work was supported by the Office of Science,
U.S. Department of Energy under Contract No. DEAC02-98CH10886.
NR 165
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U2 24
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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 NOV
PY 2008
VL 78
IS 17
AR 174529
DI 10.1103/PhysRevB.78.174529
PG 13
WC Physics, Condensed Matter
SC Physics
GA 376WU
UT WOS:000261214500097
ER
PT J
AU Vandescuren, M
Hermet, P
Meunier, V
Henrard, L
Lambin, P
AF Vandescuren, M.
Hermet, P.
Meunier, V.
Henrard, L.
Lambin, Ph.
TI Theoretical study of the vibrational edge modes in graphene nanoribbons
SO PHYSICAL REVIEW B
LA English
DT Article
DE carbon; density functional theory; electronic density of states;
localised states; nanostructured materials; phonons; Raman spectra
ID WALLED CARBON NANOTUBES; GRAPHITE; SYSTEMS; HYDROCARBONS; PHONONS;
RIBBONS; STATES; PHASE; FILMS
AB We investigate the phonon normal modes in hydrogen-terminated graphene nanoribbons (GNRs) using the second-generation reactive empirical bond order (REBOII) potential and density-functional theory calculations. We show that specific modes, absent in pristine graphene and localized at the GNR edges, are intrinsic signatures of the vibrational density of states of the GNRs. Three particular modes are described in details: a transverse phonon mode related to armchair GNRs, a hydrogen out-of-plane mode present in both armchair and zigzag GNRs, and the Raman radial-breathing-like mode. The good agreement between the frequencies of selected edge modes obtained using REBOII and first-principles methods shows the reliability of this empirical potential for the calculation and the assignment of phonon modes in carbon nanostructures where carbon atoms present a sp(2) hybridization.
C1 [Vandescuren, M.; Hermet, P.; Henrard, L.; Lambin, Ph.] Fac Univ Notre Dame Paix, Lab Phys Solide, B-5000 Namur, Belgium.
[Meunier, V.] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
RP Vandescuren, M (reprint author), Fac Univ Notre Dame Paix, Lab Phys Solide, B-5000 Namur, Belgium.
EM matthieu.vandescuren@fundp.ac.be
RI Meunier, Vincent/F-9391-2010;
OI Meunier, Vincent/0000-0002-7013-179X; Lambin,
Philippe/0000-0001-8051-042X
FU Belgian National Fund for Scientific Research; European Commission under
the 6 Framework Programme [NMP4-CT-2006-0335D]; Scientific User
Facilities Division, Office of Basic Energy Sciences, U.S. Department of
Energy
FX M.V. and L.H. are supported by the Belgian National Fund for Scientific
Research (FNRS). P.H. is supported by the European Commission under the
6 Framework Programme (STREP project BNC tubes under Contract No.
NMP4-CT-2006-0335D). A portion of this research was sponsored by the
Scientific User Facilities Division, Office of Basic Energy Sciences,
U.S. Department of Energy. The authors acknowledge the use of the Namur
Interuniversity Scientific Computing Facility (Namur-ISCF), a common
project between FNRS, SUN Microsystems, and Les Facultes Universitaires
Notre-Dame de la Paix (FUNDP).
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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 NOV
PY 2008
VL 78
IS 19
AR 195401
DI 10.1103/PhysRevB.78.195401
PG 8
WC Physics, Condensed Matter
SC Physics
GA 396RC
UT WOS:000262607800087
ER
PT J
AU Vavassori, P
Bisero, D
Bonanni, V
Busato, A
Grimsditch, M
Lebecki, KM
Metlushko, V
Ilic, B
AF Vavassori, P.
Bisero, D.
Bonanni, V.
Busato, A.
Grimsditch, M.
Lebecki, K. M.
Metlushko, V.
Ilic, B.
TI Magnetostatic dipolar domain-wall pinning in chains of permalloy
triangular rings
SO PHYSICAL REVIEW B
LA English
DT Article
ID MAGNETS; LOGIC
AB In a combined experimental and numerical study, we investigated the details of the motion and pinning of domain walls in isolated and interacting permalloy triangular rings (side 2 mu m, width 250 nm, and thickness 25 nm). To induce interaction between the rings, they were arranged either in vertical chains with an apex of each triangle in proximity to the edge center of the triangle above it or in horizontal chains where the proximity is between the adjacent corners of the triangles. Using longitudinal and diffraction magneto-optic Kerr effects, magnetic force microscopy, and micromagnetic simulations, we determined the field dependence of the spin structure in the rings. In all cases the remnant state of each ring is an "onion" state characterized by two domain walls-one head to head the other tail to tail-pinned at the apexes. In isolated rings the magnetization reversal occurs between two onion states via the formation of an intermediate vortex state, which arises from the motion and annihilation of the two domain walls. In the case of the horizontal chains the reversal mechanism is unchanged except that the dipolar interaction affects the field range in which the rings are in the vortex state. In the case of vertical chains an additional intermediate state is observed during reversal. The new state involves a domain wall pinned at the center of the edge that is in close proximity to the apex of its neighbor. We show that the domain-wall motion in this last case can be modeled by a triple potential well. Because the new state requires that a domain wall be pinned at the neighboring apex, our observations can be viewed as a very elementary form of magnetic logic.
C1 [Vavassori, P.] CIC nanoGUNE Consolider, E-20009 San Sebastian, Spain.
[Vavassori, P.; Bisero, D.; Bonanni, V.; Busato, A.] Univ Ferrara, CNISM, I-44100 Ferrara, Italy.
[Vavassori, P.; Bisero, D.; Bonanni, V.; Busato, A.] Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy.
[Vavassori, P.; Bisero, D.] CNR, INFM, Natl Res Ctr, I-41100 Modena, Italy.
[Grimsditch, M.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Lebecki, K. M.] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland.
[Metlushko, V.] Univ Illinois, Dept Elect & Comp Engn, Chicago, IL 60607 USA.
[Ilic, B.] Cornell Univ, Sch Appl & Engn Phys, Cornell Nanofabricat Facil, Ithaca, NY 14853 USA.
RP Vavassori, P (reprint author), CIC nanoGUNE Consolider, E-20009 San Sebastian, Spain.
RI Bonanni, Valentina/F-1398-2011; Ilic, Rob/N-1359-2014; nanoGUNE,
CIC/A-2623-2015; Vavassori, Paolo/B-4299-2014
OI Bonanni, Valentina/0000-0001-8346-0069; Vavassori,
Paolo/0000-0002-4735-6640
FU U.S. NSF [0823813]; U. S. Department of Energy Office of Science Office
of Basic Energy Sciences [DE-AC02-06C1357]
FX VM. acknowledges support by the U.S. NSF under Grant No. ECCS-0823813
and by the U. S. Department of Energy Office of Science Office of Basic
Energy Sciences under Contract No. DE-AC02-06C1357 (CNM ANL Grants No.
468 and No. 470).
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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 NOV
PY 2008
VL 78
IS 17
AR 174403
DI 10.1103/PhysRevB.78.174403
PG 7
WC Physics, Condensed Matter
SC Physics
GA 376WU
UT WOS:000261214500042
ER
PT J
AU Vedda, A
Nikl, M
Fasoli, M
Mihokova, E
Pejchal, J
Dusek, M
Ren, G
Stanek, CR
McClellan, KJ
Byler, DD
AF Vedda, A.
Nikl, M.
Fasoli, M.
Mihokova, E.
Pejchal, J.
Dusek, M.
Ren, G.
Stanek, C. R.
McClellan, K. J.
Byler, D. D.
TI Thermally stimulated tunneling in rare-earth-doped oxyorthosilicates
SO PHYSICAL REVIEW B
LA English
DT Article
DE cerium; electron traps; electron-hole recombination; lutetium compounds;
radiative lifetimes; samarium; terbium; thermoluminescence; thulium;
tunnelling; vacancies (crystal); X-ray effects; yttrium compounds
ID PHOTOSTIMULATED LUMINESCENCE; SINGLE-CRYSTALS; X-RAY; SCINTILLATORS;
THERMOLUMINESCENCE; LU2SIO5; GROWTH; AFTERGLOW; IONS; EPR
AB We present an investigation of defects acting as electron traps in Lu2SiO5 (LSO) and LuxY2-xSiO5 (LYSO) performed by wavelength-resolved thermally stimulated luminescence (TSL) measurements from 20 to 400 degrees C after room-temperature (RT) x-ray irradiation. Single crystals doped with several rare-earth ions such as Ce, Tb, Tm, and Sm were considered. A comparison between TSL and RT radio-luminescence (RL) emission spectra is also presented. The glow curves for both LSO and LYSO are similar, showing a series of TSL peaks at 78, 135, 181, and 236 degrees C. In addition, a further peak at about 300 degrees C is observed only in LYSO. Our results confirm the role of oxygen vacancies as electron traps in the material; the presence of several glow peaks with a unique trap depth (0.99 eV +/- 0.07 eV) for the 78, 135, 181, and 236 degrees C peaks is explained by suggesting that electrons stored in oxygen vacancies recombine through a thermally assisted tunneling mechanism with holes localized at Ce3+ or Tb3+ centers residing on Lu sites at different crystallographic distances from the traps. This model is supported by the very good correlation among O-Lu distances in the monoclinic C2/c structure of LSO and LYSO and the frequency factors of the traps containing the transmission coefficients of the potential barriers between traps and centers, evaluated in the framework of the thermally assisted tunneling process. Tm and Sm ions do not act as TSL recombination centers possibly due to their tendency to trap electrons during irradiation with ionizing radiation.
C1 [Vedda, A.; Nikl, M.; Fasoli, M.] Univ Milano Bicocca, Dept Mat Sci, I-20125 Milan, Italy.
[Nikl, M.; Mihokova, E.; Pejchal, J.; Dusek, M.] Acad Sci Czech Republic, Inst Phys, Prague 16253, Czech Republic.
[Ren, G.] SIC, Shanghai 200050, Peoples R China.
[Stanek, C. R.; McClellan, K. J.; Byler, D. D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Vedda, A (reprint author), Univ Milano Bicocca, Dept Mat Sci, Via Cozzi 53, I-20125 Milan, Italy.
EM anna.vedda@unimib.it
RI Dusek, Michal/B-7316-2011; Mihokova, Eva/G-3966-2014;
OI Fasoli, Mauro/0000-0001-5463-4875
FU Italian Cariplo Foundation; Czech projects [AV IAA100100810]; MSMT
KONTAKT [ME08034]
FX The authors gratefully acknowledge the financial support of the Italian
Cariplo Foundation Project "Structure and optical properties of
self-organized nano- and mesoscopic materials" (2006-2008) and of the
Czech projects GA (Contract No. AV IAA100100810) and MSMT KONTAKT
(Contract No. ME08034). The authors are grateful to K. Jurek for
performing x-ray electron probe microanalysis and to V. Jary for
carrying out the photoluminescence experiment and data evaluation.
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SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD NOV
PY 2008
VL 78
IS 19
AR 195123
DI 10.1103/PhysRevB.78.195123
PG 8
WC Physics, Condensed Matter
SC Physics
GA 396RC
UT WOS:000262607800047
ER
PT J
AU Vorontsov, AB
Vekhter, I
Graf, MJ
AF Vorontsov, A. B.
Vekhter, I.
Graf, M. J.
TI Pauli-limited upper critical field in dirty d-wave superconductors
SO PHYSICAL REVIEW B
LA English
DT Article
ID LARKIN-OVCHINNIKOV STATE; HEAVY-FERMION SUPERCONDUCTORS; INHOMOGENEOUS
STATE; EXCHANGE FIELD; BIS(ETHYLENE-DITHIO)TETRATHIAFULVALENE;
IMPURITIES; TRANSPORT
AB We calculate the Pauli-limited upper critical field and the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) instability for dirty d-wave superconductors within the quasiclassical theory using the self-consistent (t) over cap- matrix approximation for impurities. We find that the phase diagram depends sensitively on the scattering rate and phase shift of nonmagnetic impurities. The transition into the superconducting state is always second order for weak (Born) scattering, while in the unitarity (strong) scattering limit a first-order transition into both uniform and spatially modulated superconducting states is stabilized. Contrary to general belief, we find that the FFLO phase is robust against disorder and survives impurity scattering equivalent to a T(c) suppression of roughly 40%. Our results bear on the search of FFLO states in heavy-fermion and layered organic superconductors.
C1 [Vorontsov, A. B.; Vekhter, I.] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
[Graf, M. J.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Vorontsov, AB (reprint author), Univ Wisconsin, Dept Phys, 1150 Univ Ave, Madison, WI 53706 USA.
EM anton@physics.wisc.edu
RI Vekhter, Ilya/M-1780-2013
FU Louisiana Board of Regents; U. S. DOE [DE-AC52-06NA25396,
DE-FG02-08ER46492]
FX We acknowledge support from the Louisiana Board of Regents (A. B. V. and
I. V.) and the U. S. DOE via Grants No. DE-AC52-06NA25396 (M.J.G.) and
No. DE-FG02-08ER46492 (I.V.).
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD NOV
PY 2008
VL 78
IS 18
AR 180505
DI 10.1103/PhysRevB.78.180505
PG 4
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800022
ER
PT J
AU Wang, SY
Wang, CZ
Li, MZ
Huang, L
Ott, RT
Kramer, MJ
Sordelet, DJ
Ho, KM
AF Wang, S. Y.
Wang, C. Z.
Li, M. Z.
Huang, L.
Ott, R. T.
Kramer, M. J.
Sordelet, D. J.
Ho, K. M.
TI Short- and medium-range order in a Zr(73)Pt(27) glass: Experimental and
simulation studies
SO PHYSICAL REVIEW B
LA English
DT Article
ID TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; METALLIC GLASSES;
QUASI-CRYSTALS; MOLECULAR-DYNAMICS; AMORPHOUS ALLOY; ATOMIC PACKING;
PHASE; LIQUIDS; PD
AB The structure of a Zr(73)Pt(27) metallic glass, which forms a Zr(5)Pt(3) (Mn(5)Si(3)-type) phase having local atomic clusters with distorted icosahedral coordination during the primary crystallization, has been investigated by means of x-ray diffraction and combining ab initio molecular-dynamics (MD) and reverse Monte Carlo (RMC) simulations. The ab initio MD simulation provides an accurate description of short-range structural and chemical ordering in the glass. A three-dimensional atomistic model of 18 000 atoms for the glass structure has been generated by the RMC method utilizing both the structure factor S(k) from x-ray diffraction experiment and the partial pair-correlation functions from ab initio MD simulation. Honeycutt and Andersen index and Voronoi cell analyses, respectively, were used to characterize the short- and medium-range order in the atomistic structure models generated by ab initio MD and RMC simulations. The ab initio results show that an icosahedral type of short- range order is predominant in the glass state. Furthermore, analysis of the atomic model from the constrained RMC simulations reveals that the icosahedral-like clusters are packed in arrangements having higher-order correlations, thus establishing medium-range topological order up to two or three cluster shells.
C1 [Wang, S. Y.] Fudan Univ, Dept Opt Sci & Engn, State Key Lab Adv Photon Mat & Devices, Shanghai 200433, Peoples R China.
[Wang, S. Y.; Wang, C. Z.; Li, M. Z.; Huang, L.; Ott, R. T.; Kramer, M. J.; Sordelet, D. J.; Ho, K. M.] US DOE, Ames Lab, Ames, IA 50011 USA.
[Wang, S. Y.; Wang, C. Z.; Li, M. Z.; Huang, L.; Ho, K. M.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Li, M. Z.] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China.
RP Wang, SY (reprint author), Fudan Univ, Dept Opt Sci & Engn, State Key Lab Adv Photon Mat & Devices, Shanghai 200433, Peoples R China.
RI 石, 源/D-5929-2012; ruc, phy/E-4170-2012; Wang, Songyou/H-4529-2011
OI Wang, Songyou/0000-0002-4249-3427
FU NSF of China [60578046]; Fudan High-End Computing Center. Ames
Laboratory; U.S. Department of Energy by Iowa State University
[DE-AC02-07CH11358]; Energy Research, Office of Basic Energy Sciences;
National Energy Research Supercomputing Center (NERSC) in Berkeley; U.S.
Department of Energy [DE-AC02-06CH11357]
FX One of the authors (S.Y.W.) was supported by the NSF of China (Grant No.
60578046) and the Fudan High-End Computing Center. 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 for Energy Research, Office of Basic Energy Sciences, including
a grant of computer time at the National Energy Research Supercomputing
Center (NERSC) in Berkeley. The work at the Advanced Photon Source was
supported by U.S. Department of Energy under Contract No.
DE-AC02-06CH11357.
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SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD NOV
PY 2008
VL 78
IS 18
AR 184204
DI 10.1103/PhysRevB.78.184204
PG 9
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800041
ER
PT J
AU Wray, L
Qian, D
Hsieh, D
Xia, Y
Li, L
Checkelsky, JG
Pasupathy, A
Gomes, KK
Parker, CV
Fedorov, AV
Chen, GF
Luo, JL
Yazdani, A
Ong, NP
Wang, NL
Hasan, MZ
AF Wray, L.
Qian, D.
Hsieh, D.
Xia, Y.
Li, L.
Checkelsky, J. G.
Pasupathy, A.
Gomes, K. K.
Parker, C. V.
Fedorov, A. V.
Chen, G. F.
Luo, J. L.
Yazdani, A.
Ong, N. P.
Wang, N. L.
Hasan, M. Z.
TI Momentum dependence of superconducting gap, strong-coupling dispersion
kink, and tightly bound Cooper pairs in the high-T-c
(Sr,Ba)(1-x)(K,Na)(x)Fe2As2 superconductors
SO PHYSICAL REVIEW B
LA English
DT Article
AB We present a systematic angle-resolved photoemission spectroscopic study of the high-T-c superconductor class (Sr/Ba)(1-x)KxFe2As2. By utilizing a photon-energy-modulation contrast and scattering geometry we report the Fermi surface and the momentum dependence of the superconducting gap, Delta((k) over right arrow). A prominent quasiparticle dispersion kink reflecting strong scattering processes is observed in a binding-energy range of 25-55 meV in the superconducting state, and the coherence length or the extent of the Cooper pair wave function is found to be about 20 angstrom, which is uncharacteristic of a superconducting phase realized by the BCS-phonon-retardation mechanism. The observed 40 +/- 15 meV kink likely reflects contributions from the frustrated spin excitations in a J(1)-J(2) magnetic background and scattering from the soft phonons. Results taken collectively provide direct clues to the nature of the pairing potential including an internal phase-shift factor in the superconducting order parameter which leads to a Brillouin zone node in a strong-coupling setting.
C1 [Wray, L.; Qian, D.; Hsieh, D.; Xia, Y.; Li, L.; Checkelsky, J. G.; Pasupathy, A.; Gomes, K. K.; Parker, C. V.; Yazdani, A.; Ong, N. P.; Hasan, M. Z.] Princeton Univ, Dept Phys, Joseph Henry Labs Phys, Princeton, NJ 08544 USA.
[Fedorov, A. V.] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94305 USA.
[Chen, G. F.; Luo, J. L.; Wang, N. L.] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China.
[Hasan, M. Z.] Princeton Univ, Princeton Ctr Complex Mat, Princeton, NJ 08544 USA.
RP Hasan, MZ (reprint author), Princeton Univ, Dept Phys, Joseph Henry Labs Phys, Princeton, NJ 08544 USA.
EM mzhasan@Princeton.edu
RI HASAN, M. Zahid/D-8237-2012; Qian, Dong/O-1028-2015
FU DOE [DEFG-02-05ER46200]; NSF [DMR-0213706]
FX We acknowledge discussions with D.A. Huse, P.W. Anderson, S. Sachdev,
D.-H. Lee, and B.A. Bernevig. This work is supported by DOE Grant No.
DEFG-02-05ER46200 and NSF Grant No. DMR-0213706. The use of ALS at LBNL
and SSRL at SLAC are supported by the U.S. DOE.
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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 NOV
PY 2008
VL 78
IS 18
AR 184508
DI 10.1103/PhysRevB.78.184508
PG 5
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800092
ER
PT J
AU Xiang, HJ
Wei, SH
Da Silva, JLF
Li, JB
AF Xiang, H. J.
Wei, Su-Huai
Da Silva, Juarez L. F.
Li, Jingbo
TI Strain relaxation and band-gap tunability in ternary InxGa1-xN nanowires
SO PHYSICAL REVIEW B
LA English
DT Article
DE density functional theory; energy gap; enthalpy; gallium compounds;
ground states; III-V semiconductors; indium compounds; Monte Carlo
methods; nanowires; semiconductor quantum wires; wide band gap
semiconductors
ID SPECIAL QUASIRANDOM STRUCTURES; TOTAL-ENERGY CALCULATIONS;
AUGMENTED-WAVE METHOD; BASIS-SET; ALLOYS; SEMICONDUCTORS; INN
AB The alloy formation enthalpy and band structure of InGaN nanowires were studied by a combined approach of the valence-force field model, Monte Carlo simulation, and density-functional theory (DFT). For both random and ground-state structures of the coherent InGaN alloy, the nanowire configuration was found to be more favorable for the strain relaxation than the bulk alloy. We proposed an analytical formula for computing the band gap of any InGaN nanowires based on the results from the screened exchange hybrid DFT calculations, which in turn reveals a better band-gap tunability in ternary InGaN nanowires than the bulk alloy.
C1 [Xiang, H. J.; Wei, Su-Huai; Da Silva, Juarez L. F.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Li, Jingbo] Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China.
RP Xiang, HJ (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM suhuai_wei@nrel.gov; jbli@semi.ac.cn
RI Da Silva, Juarez L. F./D-1779-2011; Xiang, Hongjun/I-4305-2016
OI Da Silva, Juarez L. F./0000-0003-0645-8760; Xiang,
Hongjun/0000-0002-9396-3214
FU U.S. Department of Energy [DE-AC36-99GO10337]; Chinese Academy of
Sciences
FX Work at NREL was supported by the U.S. Department of Energy under
Contract No. DE-AC36-99GO10337. We thank G. Kresse for providing us the
VASP 5.1 code. J.L. gratefully acknowledges financial support from the
"One-Hundred Talents Plan" of the Chinese Academy of Sciences.
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SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD NOV
PY 2008
VL 78
IS 19
AR 193301
DI 10.1103/PhysRevB.78.193301
PG 4
WC Physics, Condensed Matter
SC Physics
GA 396RC
UT WOS:000262607800007
ER
PT J
AU Yao, Y
Zhao, H
Moore, JE
Wu, CQ
AF Yao, Yao
Zhao, Hui
Moore, Joel E.
Wu, Chang-Qin
TI Controllable spin-current blockade in a Hubbard chain
SO PHYSICAL REVIEW B
LA English
DT Article
DE hopping conduction; Hubbard model; renormalisation; spin polarised
transport; strongly correlated electron systems
ID QUANTUM RENORMALIZATION-GROUPS; ONE-DIMENSIONAL SRCUO2; CHARGE
SEPARATION; OPTICAL LATTICES; TRANSPORT
AB We investigate the spin or charge transport in a one-dimensional strongly correlated system by using the adaptive time-dependent density-matrix renormalization-group method. The model we consider is a non-half-filled Hubbard chain with a bond of controllable spin-dependent electron hoppings, which is found to cause a blockade of spin current with little influence on charge current. We have considered (1) the spread of a wave packet of both spin and charge and (2) the spin and charge currents induced by a spin-dependent voltage bias. It is found that the spin-charge separation plays a crucial role in the spin-current blockade, which may be utilized to observe the spin-charge separation directly.
C1 [Yao, Yao; Zhao, Hui; Wu, Chang-Qin] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China.
[Yao, Yao; Zhao, Hui; Wu, Chang-Qin] Fudan Univ, Surface Phys Lab, Shanghai 200433, Peoples R China.
[Zhao, Hui] Tongji Univ, Dept Phys, Shanghai 200092, Peoples R China.
[Moore, Joel E.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Moore, Joel E.] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Yao, Y (reprint author), Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China.
EM cqw@fudan.edu.cn
RI Wu, Chang-Qin/D-3701-2011; Moore, Joel/O-4959-2016
OI Moore, Joel/0000-0002-4294-5761
FU NSF of China; MST of China [2006CB921302]; Western Institute of
Nanoelectronics; OFSPIN [NMP3-CT-2006-033370]
FX This work was supported by the NSF of China, the MST of China (Grant No.
2006CB921302), the Western Institute of Nanoelectronics, and the EC
Project OFSPIN (Grant No. NMP3-CT-2006-033370).
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SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD NOV
PY 2008
VL 78
IS 19
AR 193105
DI 10.1103/PhysRevB.78.193105
PG 4
WC Physics, Condensed Matter
SC Physics
GA 396RC
UT WOS:000262607800005
ER
PT J
AU Ye, F
Ren, Y
Fernandez-Baca, JA
Mook, HA
Lynn, JW
Chaudhury, RP
Wang, YQ
Lorenz, B
Chu, CW
AF Ye, F.
Ren, Y.
Fernandez-Baca, J. A.
Mook, H. A.
Lynn, J. W.
Chaudhury, R. P.
Wang, Y. -Q.
Lorenz, B.
Chu, C. W.
TI Magnetic switching and phase competition in the multiferroic
antiferromagnet Mn1-xFexWO4
SO PHYSICAL REVIEW B
LA English
DT Article
DE antiferromagnetic materials; dielectric polarisation; ferroelectric
materials; frustration; iron compounds; magnetic structure; magnetic
switching; magnetoelectric effects; manganese compounds; multiferroics;
neutron diffraction
ID MNWO4; FERROELECTRICITY; POLARIZATION
AB Elastic neutron scattering is used to study the spin correlations in the multiferroic Mn1-xFexWO4 with x=0.035, 0.05, and 0.10. The noncollinear incommensurate (ICM) magnetic structure associated with the ferroelectric (FE) phase in pure MnWO4 is suppressed at x=0.035 and completely absent at x=0.10. The ICM spin order and FE phase can be restored by applying a magnetic field along the spin easy axis. The low-T commensurate magnetic structure extends in both H/T with increasing Fe concentration. The systematic evolution of the magnetic and electric properties indicates that the noncollinear ICM spin order results from competing magnetic interactions and its stabilization can be tuned by the internal (x) or external (magnetic-field) perturbations.
C1 [Ye, F.; Fernandez-Baca, J. A.; Mook, H. A.] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
[Ren, Y.] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA.
[Fernandez-Baca, J. A.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Lynn, J. W.] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[Chaudhury, R. P.; Wang, Y. -Q.; Lorenz, B.; Chu, C. W.] Univ Houston, Dept Phys, Houston, TX 77204 USA.
[Chaudhury, R. P.; Wang, Y. -Q.; Lorenz, B.; Chu, C. W.] Univ Houston, TCSUH, Houston, TX 77204 USA.
RP Ye, F (reprint author), Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
EM yef1@ornl.gov
RI Ye, Feng/B-3210-2010; Fernandez-Baca, Jaime/C-3984-2014
OI Ye, Feng/0000-0001-7477-4648; Fernandez-Baca, Jaime/0000-0001-9080-5096
FU Office of Basic Energy Sciences; U.S. Department of Energy; National
Science Foundation [DMR-0454672]; T.L.L. Temple Foundation; J.J. and R.
Moores Endowment; U.S. Air Force Office of Scientific Research; State of
Texas through TCSUH
FX We are grateful to R. S. Fishman and T. Kimura for helpful discussions.
This work was partially supported by Division of Scientific User
Facilities of the Office of Basic Energy Sciences, U.S. Department of
Energy. This work utilized facilities supported in part by the National
Science Foundation under Agreement No. DMR-0454672. Work at Houston was
supported by the T.L.L. Temple Foundation, the J.J. and R. Moores
Endowment, the U.S. Air Force Office of Scientific Research, and the
State of Texas through TCSUH.
NR 29
TC 31
Z9 31
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 NOV
PY 2008
VL 78
IS 19
AR 193101
DI 10.1103/PhysRevB.78.193101
PG 4
WC Physics, Condensed Matter
SC Physics
GA 396RC
UT WOS:000262607800001
ER
PT J
AU Ye, HG
Chen, GD
Wu, YL
Zhu, YZ
Wei, SH
AF Ye, Honggang
Chen, Guangde
Wu, Yelong
Zhu, Youzhang
Wei, Su-Huai
TI Relaxation models of the (110) zinc-blende III-V semiconductor surfaces:
Density functional study
SO PHYSICAL REVIEW B
LA English
DT Article
DE bond angles; density functional theory; electronegativity; gallium
arsenide; III-V semiconductors; indium compounds; surface structure
ID TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; NONPOLAR SURFACES; ATOMIC
STRUCTURES; GAAS(110); NITRIDE; GAAS; GAN; GROWTH
AB Clean III-V zinc-blende (110) surfaces are the most extensively studied semiconductor surface. For conventional III-V compounds such as GaAs and InP, the surface relaxation follows a bond rotation relaxation model. However, for III-nitrides recent study indicates that they follow a bond-constricting relaxation model. First-principles atom relaxation calculations are performed to explore the origin of the difference between the two groups of materials. By analyzing the individual shift trends and ionic properties of the top layer anions and cations, we attribute the difference between the conventional and nitride III-V compounds to the strong electronegativity of N, which leads to the s(2)p(3) pyramid bond angle to be larger than the ideal one in bulk (109.5 degrees). The general trends of the atomic relaxation at the III-nitrides (110) surfaces are explained.
C1 [Ye, Honggang; Chen, Guangde; Wu, Yelong; Zhu, Youzhang] Xi An Jiao Tong Univ, Dept Appl Phys, Xian 710049, Peoples R China.
[Wei, Su-Huai] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Ye, HG (reprint author), Xi An Jiao Tong Univ, Dept Appl Phys, Xian 710049, Peoples R China.
RI Ye, Honggang/A-8035-2008; Wu, Yelong/G-1100-2010; Chen,
Guangde/D-4373-2011; chen, guangde/I-4260-2014
OI Ye, Honggang/0000-0002-5643-5914; Wu, Yelong/0000-0002-4211-911X;
FU China National Natural Science Fund [10474078]; Xi'an Jiaotong
University; U.S. DOE [DE-AC36-99GO10337]
FX The authors gratefully acknowledge the financial support of the China
National Natural Science Fund (Grant No. 10474078) and the computing
support of the "Intelligent Information Processing and Computing
Laboratory" of Xi'an Jiaotong University. The work at NREL is supported
by the U.S. DOE under Contract No. DE-AC36-99GO10337.
NR 33
TC 7
Z9 7
U1 0
U2 9
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 NOV
PY 2008
VL 78
IS 19
AR 193308
DI 10.1103/PhysRevB.78.193308
PG 4
WC Physics, Condensed Matter
SC Physics
GA 396RC
UT WOS:000262607800014
ER
PT J
AU Zhang, LJ
Subedi, A
Singh, DJ
Du, MH
AF Zhang, Lijun
Subedi, Alaska
Singh, D. J.
Du, M. H.
TI Possible superconductivity in Fe-Sb based materials: Density functional
study of LiFeSb
SO PHYSICAL REVIEW B
LA English
DT Article
ID PHASE-DIAGRAM; IRON
AB We investigate the electronic and other properties of the hypothetical compound LiFeSb in relation to superconducting LiFeAs and FeSe using density-functional calculations. The results show that LiFeSb in the LiFeAs structure would be dynamically stable in the sense of having no unstable phonon modes and would have very similar electronic and magnetic properties to the layered Fe-based superconductors. Importantly, a very similar structure for the Fermi surface and a spin-density wave related to but stronger than that in the corresponding As compound is found. These results are indicative of possible superconductivity analogous to the Fe-As based compounds if the spin-density wave can be suppressed by doping or other means. Prospects for synthesizing this material in pure form or in solid solution with FeTe are discussed.
C1 [Zhang, Lijun; Subedi, Alaska; Singh, D. J.; Du, M. H.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Subedi, Alaska] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 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; Du, Mao-Hua/B-2108-2010; Singh,
David/I-2416-2012
OI Du, Mao-Hua/0000-0001-8796-167X;
FU Department of Energy, Division of Materials Sciences and Engineering
FX We are grateful for helpful discussions with D. Mandrus, I. I. Mazin,
and B. C. Sales. This work was supported by the Department of Energy,
Division of Materials Sciences and Engineering.
NR 55
TC 16
Z9 17
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 NOV
PY 2008
VL 78
IS 17
AR 174520
DI 10.1103/PhysRevB.78.174520
PG 5
WC Physics, Condensed Matter
SC Physics
GA 376WU
UT WOS:000261214500088
ER
PT J
AU Zhou, CG
Zhang, XG
AF Zhou, Chenggang
Zhang, X. -G.
TI Numerical study of the noise power of a carbon nanowire network
SO PHYSICAL REVIEW B
LA English
DT Article
ID 1/F NOISE; FLUCTUATIONS; TRANSITION; NANOTUBES
AB A thin film made of a carbon nanowire network can be mapped into a resistor network containing tunnel junctions that are randomly switched. In such a network the variance in individual resistance is infinity so the perturbative analysis must be applied on conductances. We study the relationship between the noise power and the network morphology through a Monte Carlo simulation of the conductance and the 1/f noise spectrum. We find that the noise power scales with the average current in a power law S proportional to I(-omega), where omega is a function of the network morphology. The noise spectrum is studied in detail, and we give a simple explanation for the observed relation between total noise power and the conductance.
C1 [Zhou, Chenggang; Zhang, X. -G.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
[Zhang, X. -G.] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
RP Zhou, CG (reprint author), Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, POB 2008, Oak Ridge, TN 37831 USA.
FU Oak Ridge National Laboratory's Center for Nanophase Materials Sciences;
Assistant Secretary for Energy Efficiency and Renewable Energy; Office
of Building Technology; U.S. Department of EnergyScientific User
Facilities Division; Office of Basic Energy Sciences; U.S. Department of
Energy
FX This research at Oak Ridge National Laboratory's Center for Nanophase
Materials Sciences was sponsored by the Assistant Secretary for Energy
Efficiency and Renewable Energy, Office of Building Technology, U.S.
Department of Energy, and by the Scientific User Facilities Division,
Office of Basic Energy Sciences, U.S. Department of Energy.
NR 15
TC 2
Z9 2
U1 1
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 NOV
PY 2008
VL 78
IS 17
AR 174307
DI 10.1103/PhysRevB.78.174307
PG 6
WC Physics, Condensed Matter
SC Physics
GA 376WU
UT WOS:000261214500038
ER
PT J
AU Zhou, SH
Napolitano, RE
AF Zhou, S. H.
Napolitano, R. E.
TI Energetics of nonequilibrium solidification in Al-Sm
SO PHYSICAL REVIEW B
LA English
DT Article
ID SPECIAL QUASIRANDOM STRUCTURES; BINARY-SYSTEM; CRYSTALLIZATION BEHAVIOR;
AMORPHOUS-ALLOYS; PHASE-EQUILIBRIA; ENTHALPIES; STABILITY; ALUMINUM
AB Solution-based thermodynamic modeling, aided by first-principles calculations, is employed here to examine phase transformations in the Al-Sm binary system which may give rise to product phases that are metastable or have a composition that deviates substantially from equilibrium. In addition to describing the pure undercooled Al liquid with a two-state model that accounts for structural ordering, thermodynamic descriptions of the fcc phase, and intermediate compounds (Al4Sm-beta, Al(11)Sm(3)-alpha, Al(3)Sm-delta, and Al(2)Sm-sigma) are reanalyzed using special quasirandom structure and first-principles calculations. The possible phase compositions are presented over a range of temperatures using a "Baker-Cahn" analysis of the energetics of solidification and compared with reports of rapid solidification. The energetics associated with varying degrees of chemical partitioning are quantified and compared with experimental observations of the metastable Al(11)Sm(3)-alpha primary phase and reports of amorphous solids.
C1 [Zhou, S. H.; Napolitano, R. E.] US DOE, Ames Lab, Ames, IA 50011 USA.
[Napolitano, R. E.] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
RP Zhou, SH (reprint author), US DOE, Ames Lab, Ames, IA 50011 USA.
FU U.S. Department of Energy, Basic Energy Sciences [DE-AC0207CH11358]
FX This work was performed within the Ames Laboratory and was supported by
the U.S. Department of Energy, Basic Energy Sciences, under Contract No.
DE-AC0207CH11358.
NR 24
TC 5
Z9 5
U1 3
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 NOV
PY 2008
VL 78
IS 18
AR 184111
DI 10.1103/PhysRevB.78.184111
PG 9
WC Physics, Condensed Matter
SC Physics
GA 376WX
UT WOS:000261214800036
ER
PT J
AU Zhou, SY
Siegel, DA
Fedorov, AV
Lanzara, A
AF Zhou, S. Y.
Siegel, D. A.
Fedorov, A. V.
Lanzara, A.
TI Kohn anomaly and interplay of electron-electron and electron-phonon
interactions in epitaxial graphene
SO PHYSICAL REVIEW B
LA English
DT Article
DE band structure; binding energy; carbon; electron-phonon interactions;
epitaxial layers; nanostructured materials; photoelectron spectra
ID GRAPHITE; SPECTROSCOPY; SUBSTRATE; DYNAMICS; FILMS
AB The interplay of electron-phonon (el-ph) and electron-electron (el-el) interactions in epitaxial graphene is studied by directly probing its electronic structure. We found a strong coupling of electrons to the soft part of the A(1g) phonon evident by a kink at 150 +/- 15 meV, while the coupling of electrons to another expected phonon E-2g at 195 meV can only be barely detected. The possible role of the el-el interaction to account for the enhanced coupling of electrons to the A(1g) phonon, and the contribution of el-ph interaction to the linear imaginary part of the self-energy at high binding energy are also discussed. Our results reveal the dominant role of the A(1g) phonon in the el-ph interaction in graphene and highlight the important interplay of el-el and el-ph interactions in the self-energy of graphene.
C1 [Zhou, S. Y.; Siegel, D. A.; Lanzara, A.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Zhou, S. Y.; Siegel, D. A.; Lanzara, A.] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Fedorov, A. V.] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Zhou, SY (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RI Zhou, Shuyun/A-5750-2009
FU National Science Foundation [DMR03-49361]; Office of Science; Office of
Basic Energy Sciences; U.S. Department of Energy [DEAC03-76SF00098];
Lawrence Berkeley National Laboratory; Department of Energy
[DE-AC02-05CH11231]; Advanced Light Source
FX We thank D.-H. Lee for useful discussions. This work was supported by
the National Science Foundation through Grant No. DMR03-49361, by the
Office of Science, Office of Basic Energy Sciences, Division of
Materials Sciences and Engineering of the U.S. Department of Energy
under Contract No. DEAC03-76SF00098, and by the Laboratory Directed
Research and Development Program of Lawrence Berkeley National
Laboratory under the Department of Energy Contract No.
DE-AC02-05CH11231. S. Y. Zhou thanks the Advanced Light Source for
financial support.
NR 34
TC 43
Z9 43
U1 1
U2 21
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 NOV
PY 2008
VL 78
IS 19
AR 193404
DI 10.1103/PhysRevB.78.193404
PG 4
WC Physics, Condensed Matter
SC Physics
GA 396RC
UT WOS:000262607800021
ER
PT J
AU Algin, E
Agvaanluvsan, U
Guttormsen, M
Larsen, AC
Mitchell, GE
Rekstad, J
Schiller, A
Siem, S
Voinov, A
AF Algin, E.
Agvaanluvsan, U.
Guttormsen, M.
Larsen, A. C.
Mitchell, G. E.
Rekstad, J.
Schiller, A.
Siem, S.
Voinov, A.
TI Thermodynamic properties of (56,57)Fe
SO PHYSICAL REVIEW C
LA English
DT Article
ID STRENGTH FUNCTION; PHASE-TRANSITION; ATOMIC-NUCLEI; LEVEL DENSITY;
SPECTRA; ENERGY
AB Nuclear level densities for (56,57)Fe have been extracted from the primary gamma-ray spectra using ((3)He, (3)He(')gamma) and ((3)He, alpha gamma) reactions. Nuclear thermodynamic properties for (56)Fe and (57)Fe are investigated using the experimental level densities. These properties include entropy, Helmholtz free energy, caloric curves, chemical potential, and heat capacity. In particular, the breaking of Cooper pairs and single-quasiparticle entropy are discussed and shown to be important concepts for describing nuclear level density. Microscopic model calculations are performed for level densities of (56,57)Fe. The experimental and calculated level densities are compared. The average number of broken Cooper pairs and the parity distribution are extracted as a function of excitation energy for (56,57)Fe from the model calculations.
C1 [Algin, E.] Eskisehir Osmangazi Univ, Dept Phys, TR-26480 Meselik, Turkey.
[Agvaanluvsan, U.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Guttormsen, M.; Larsen, A. C.; Rekstad, J.; Siem, S.] Univ Oslo, Dept Phys, N-0316 Oslo, Norway.
[Mitchell, G. E.] N Carolina State Univ, Raleigh, NC 27695 USA.
[Mitchell, G. E.] Triangle Univ Nucl Lab, Durham, NC 27708 USA.
[Schiller, A.; Voinov, A.] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA.
RP Algin, E (reprint author), Eskisehir Osmangazi Univ, Dept Phys, TR-26480 Meselik, Turkey.
RI Larsen, Ann-Cecilie/C-8742-2014
OI Larsen, Ann-Cecilie/0000-0002-2188-3709
FU US Department of Energy [DE-FG02-97-ER41042, DE-FG52-06NA26194];
University of California, Lawrence Livermore National Laboratory
[W-7405-ENG-48]; Norwegian Research Council (NFR)
FX This work was supported in part by the US Department of Energy, Grant
Nos. DE-FG02-97-ER41042 and DE-FG52-06NA26194. In addition, this work
was performed under the auspices of the US Department of Energy by the
University of California, Lawrence Livermore National Laboratory under
Contract No. W-7405-ENG-48. Financial support from the Norwegian
Research Council (NFR) is gratefully acknowledged.
NR 38
TC 17
Z9 17
U1 1
U2 5
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 NOV
PY 2008
VL 78
IS 5
AR 054321
DI 10.1103/PhysRevC.78.054321
PG 9
WC Physics, Nuclear
SC Physics
GA 376WR
UT WOS:000261214200030
ER
PT J
AU Bardayan, DW
O'Malley, PD
Blackmon, JC
Chae, KY
Chipps, KA
Cizewski, JA
Hatarik, R
Jones, KL
Kozub, RL
Matei, C
Moazen, BH
Nesaraja, CD
Pain, SD
Paulauskas, S
Peters, WA
Pittman, ST
Schmitt, KT
Shriner, JF
Smith, MS
AF Bardayan, D. W.
O'Malley, P. D.
Blackmon, J. C.
Chae, K. Y.
Chipps, K. A.
Cizewski, J. A.
Hatarik, R.
Jones, K. L.
Kozub, R. L.
Matei, C.
Moazen, B. H.
Nesaraja, C. D.
Pain, S. D.
Paulauskas, S.
Peters, W. A.
Pittman, S. T.
Schmitt, K. T.
Shriner, J. F., Jr.
Smith, M. S.
TI Spectroscopic study of low-lying (16)N levels
SO PHYSICAL REVIEW C
LA English
DT Article
ID GIANT BRANCH STARS; N-15(ALPHA,GAMMA)F-19; NUCLEOSYNTHESIS;
UNCERTAINTIES; F-19
AB The magnitude of the (15)N(n,gamma)(16)N reaction rate in asymptotic giant branch stars depends directly on the neutron spectroscopic factors of low-lying (16)N levels. A new study of the (15)N(d,p)(16)N reaction is reported populating the ground and first three excited states in (16)N. The measured spectroscopic factors are near unity as expected from shell model calculations, resolving a long-standing discrepancy with earlier measurements that had never been confirmed or understood. Updated (15)N(n,gamma)(16)N reaction rates are presented.
C1 [Bardayan, D. W.; Nesaraja, C. D.; Pain, S. D.; Smith, M. S.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
[O'Malley, P. D.; Cizewski, J. A.; Hatarik, R.; Peters, W. A.] Rutgers State Univ, Dept Phys & Astron, New Brunswick, NJ 08903 USA.
[Blackmon, J. C.] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
[Chae, K. Y.; Jones, K. L.; Moazen, B. H.; Paulauskas, S.; Pittman, S. T.; Schmitt, K. T.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Chipps, K. A.] Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA.
[Kozub, R. L.; Shriner, J. F., Jr.] Tennessee Technol Univ, Dept Phys, Cookeville, TN 38505 USA.
[Matei, C.] Oak Ridge Associated Univ, Oak Ridge, TN 37830 USA.
RP Bardayan, DW (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RI Jones, Katherine/B-8487-2011; Pain, Steven/E-1188-2011; Peters,
William/B-3214-2012; Matei, Catalin/B-2586-2008
OI Jones, Katherine/0000-0001-7335-1379; Pain, Steven/0000-0003-3081-688X;
Peters, William/0000-0002-3022-4924; Matei, Catalin/0000-0002-2254-3853
FU Oak Ridge National Laboratory [DE-AC05-00OR22725]; U. S. Department of
Energy [DE-FG02-96ER40955, DE-FG02-96ER40990]; Tennessee Technological
University [DE-FG03-93ER40789]; Rutgers University [DE-FG52-03NA00143];
University of Tennessee [DE-FG02-96ER40983]; National Science Foundation
FX Oak Ridge National Laboratory is managed by UT-Battelle, LLC, for the U.
S. Department of Energy under contract No. DE-AC05-00OR22725. This work
was also supported in part by the U. S. Department of Energy under
Contract Nos. DE- FG02-96ER40955 and DE-FG02-96ER40990 with Tennessee
Technological University, DE-FG03-93ER40789 with the Colorado School of
Mines, DE-FG52-03NA00143 with Rutgers University, DE-FG02-96ER40983 with
the University of Tennessee, and the National Science Foundation.
NR 20
TC 9
Z9 9
U1 0
U2 4
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 NOV
PY 2008
VL 78
IS 5
AR 052801
DI 10.1103/PhysRevC.78.052801
PG 4
WC Physics, Nuclear
SC Physics
GA 376WR
UT WOS:000261214200006
ER
PT J
AU Bartlett, AJ
Tostevin, JA
Thompson, IJ
AF Bartlett, A. J.
Tostevin, J. A.
Thompson, I. J.
TI R-matrix and dynamical model calculations of three-body resonance decay
widths
SO PHYSICAL REVIEW C
LA English
DT Article
ID HALO NUCLEI; SCATTERING; LI-6; STATE; HE-6
AB Calculations of the decay widths of three-body resonances are considered using both R-matrix and dynamical three-body theoretical models. The R-matrix approach, which treats the three-body decay as two, ordered two-body decays, has both simultaneous and sequential particle emission pathways, each with an associated decay width. The question of how these two widths should be combined to determine the total resonance width is considered using comparisons with the width deduced from fully dynamical three-body model calculations. We use the decay of the well-understood (6)He(2(+), 1.8 MeV) resonance (into (4)He+n+n) as a benchmark case.
C1 [Bartlett, A. J.; Tostevin, J. A.] Univ Surrey, Fac Engn & Phys Sci, Dept Phys, Guildford GU2 7XH, Surrey, England.
[Thompson, I. J.] Lawrence Livermore Natl Lab, Phys Sci Directorate, Livermore, CA 94551 USA.
RP Bartlett, AJ (reprint author), Univ Surrey, Fac Engn & Phys Sci, Dept Phys, Guildford GU2 7XH, Surrey, England.
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[AC52-07NA27344]; United Kingdom Science and Technology Facilities
Council (STFC) [EP/D003628]; United Kingdom Engineering and Physical
Sciences Research Council (EPSRC)
FX This work was performed under the auspices of the U.S. Department of
Energy by Lawrence Livermore National Laboratory under contract DE-
AC52-07NA27344, and with the financial support of the United Kingdom
Science and Technology Facilities Council (STFC) under grant no.
EP/D003628. A. J. B. acknowledges the support of the United Kingdom
Engineering and Physical Sciences Research Council (EPSRC).
NR 26
TC 7
Z9 8
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 NOV
PY 2008
VL 78
IS 5
AR 054603
DI 10.1103/PhysRevC.78.054603
PG 8
WC Physics, Nuclear
SC Physics
GA 376WR
UT WOS:000261214200035
ER
PT J
AU Bashir, A
Raya, A
Cloet, IC
Roberts, CD
AF Bashir, A.
Raya, A.
Cloet, I. C.
Roberts, C. D.
TI Confinement and dynamical chiral symmetry breaking in QED3
SO PHYSICAL REVIEW C
LA English
DT Article
ID DYSON-SCHWINGER EQUATIONS; QUANTUM ELECTRODYNAMICS; FERMION PROPAGATOR;
GAUGE DEPENDENCE; VERTEX; TEMPERATURE; MODEL; RENORMALIZATION;
DECONFINEMENT; POLARIZATION
AB We establish that QED3 can possess a critical number of flavors, N(f)(c), associated with dynamical chiral symmetry breaking if, and only if, the fermion wave function renormalization and photon vacuum polarization are homogeneous functions at infrared momenta when the fermion mass function vanishes. The Ward identity entails that the fermion-photon vertex possesses the same property and ensures a simple relationship between the homogeneity degrees of each of these functions. Simple models for the photon vacuum polarization and fermion-photon vertex are used to illustrate these observations. The existence and value of N(f)(c) are contingent upon the precise form of the vertex but any discussion of gauge dependence is moot. We introduce an order parameter for confinement. Chiral symmetry restoration and deconfinement are coincident owing to an abrupt change in the analytic properties of the fermion propagator when a nonzero scalar self-energy becomes insupportable.
C1 [Bashir, A.; Raya, A.] Univ Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, Mexico.
[Cloet, I. C.; Roberts, C. D.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RP Bashir, A (reprint author), Univ Michoacana, Inst Fis & Matemat, Apartado Postal 2-82, Morelia 58040, Michoacan, Mexico.
OI Roberts, Craig/0000-0002-2937-1361
FU AMC-FUMEC [CA23]; Universidad Michoacana de San Nicolas de Hidalgo; CIC;
CONACyT [4.10, 4.22, 46614-I]; COECyT; Department of Energy, Office of
Nuclear Physics [DE-AC02-06CH11357]
FX We are pleased to acknowledge valuable interactions with B. El-Bennich,
T. Klahn, and R. D. Young. This work was supported by AMC-FUMEC grant
and CA23 grant of the Universidad Michoacana de San Nicolas de Hidalgo;
CIC and CONACyT grants under projects 4.10, 4.22, and 46614-I; COECyT
grants and the Department of Energy, Office of Nuclear Physics, Contract
No. DE-AC02-06CH11357.
NR 48
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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 NOV
PY 2008
VL 78
IS 5
AR 055201
DI 10.1103/PhysRevC.78.055201
PG 7
WC Physics, Nuclear
SC Physics
GA 376WR
UT WOS:000261214200049
ER
PT J
AU Bender, M
Bertsch, GF
Heenen, PH
AF Bender, M.
Bertsch, G. F.
Heenen, P. -H.
TI Collectivity-induced quenching of signatures for shell closures
SO PHYSICAL REVIEW C
LA English
DT Article
ID HARTREE-BOGOLIUBOV DESCRIPTION; NUCLEAR-MASS TABLE; NEUTRON DRIP-LINE;
SN ISOTOPES; MEAN-FIELD; PENNING TRAP; MODEL; SPECTROMETER; POINT; DECAY
AB Mass differences are an often used as signature and measure for shell closure. Using the angular-momentum projected generator coordinate method and the Skyrme interaction SLy4, we analyze the modification of mass differences due to static deformation and dynamic fluctuations around the mean-field ground state.
C1 [Bender, M.] Univ Bordeaux, Ctr Etud Nucl Bordeaux Grandignan, UMR5797, F-33175 Gradignan, France.
[Bender, M.] CEN Bordeaux Gradignan, CNRS, IN2P3, UMR5797, F-33175 Gradignan, France.
[Bertsch, G. F.] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
[Bertsch, G. F.] Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA.
[Heenen, P. -H.] Univ Libre Bruxelles, Serv Phys Nucl Theor, B-1050 Brussels, Belgium.
[Heenen, P. -H.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RP Bender, M (reprint author), Univ Bordeaux, Ctr Etud Nucl Bordeaux Grandignan, UMR5797, F-33175 Gradignan, France.
RI Bender, Michael/B-9004-2009
FU Belgian Office for Scientific Policy [PAI-P5-07]; US Department of
Energy [DE-FG02-00ER41132, DE-AC02-06CH11357]
FX M. B. thanks the organizers and participants of the workshop "Mass
Olympics," held at ECT* Trento 26-30 May 2008 for many inspiring
presentations and discussions. This research was supported in parts by
the PAI-P5-07 of the Belgian Office for Scientific Policy, by the US
Department of Energy under Grant DE-FG02-00ER41132 (Institute for
Nuclear Theory) and DE-AC02-06CH11357 (ANL).
NR 66
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD NOV
PY 2008
VL 78
IS 5
AR 054312
DI 10.1103/PhysRevC.78.054312
PG 7
WC Physics, Nuclear
SC Physics
GA 376WR
UT WOS:000261214200021
ER
PT J
AU Hartley, DJ
Seyfried, EP
Reviol, W
Sarantites, DG
Chiara, CJ
Pechenaya, OL
Hauschild, K
Lopez-Martens, A
Carpenter, MP
Janssens, RVF
Seweryniak, D
Zhu, S
AF Hartley, D. J.
Seyfried, E. P.
Reviol, W.
Sarantites, D. G.
Chiara, C. J.
Pechenaya, O. L.
Hauschild, K.
Lopez-Martens, A.
Carpenter, M. P.
Janssens, R. V. F.
Seweryniak, D.
Zhu, S.
TI Possible shears bands in (204)At and (206)Fr, and identification of
excited states in (205,207)Fr
SO PHYSICAL REVIEW C
LA English
DT Article
ID HIGH-SPIN STATES; NUCLEAR-DATA SHEETS; SYSTEMATIC BEHAVIOR;
SPECTROSCOPY; MECHANISM; ISOTOPES
AB Neutron-deficient astatine and francium nuclei were produced in the reaction (30)Si+(181)Ta ->(211)Fr(*) at 152 MeV. The evaporation residues from this very fissile system were selected with the HERCULES-II detector system and residue-gated gamma rays were measured with Gammasphere. Excited states were observed for the first time in (205,207)Fr, as well as sequences of low-energy transitions between high-spin states in (204)At and (206)Fr. These latter structures have properties similar to those associated with magnetic rotation (shears bands) in lead nuclei. Comparisons with established shears bands are presented and prospects for the magnetic-rotation phenomenon near the predicted N=120 "magic" number are explored.
C1 [Hartley, D. J.; Seyfried, E. P.] USN Acad, Dept Phys, Annapolis, MD 21402 USA.
[Reviol, W.; Sarantites, D. G.; Chiara, C. J.; Pechenaya, O. L.] Washington Univ, Dept Chem, St Louis, MO 63130 USA.
[Hauschild, K.; Lopez-Martens, A.] CNRS, IN2P3, CSNSM, F-91405 Orsay, France.
[Carpenter, M. P.; Janssens, R. V. F.; Seweryniak, D.; Zhu, S.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RP Hartley, DJ (reprint author), USN Acad, Dept Phys, Annapolis, MD 21402 USA.
RI Hauschild, Karl/A-6726-2009; Carpenter, Michael/E-4287-2015
OI Carpenter, Michael/0000-0002-3237-5734
FU National Science Foundation [PHY- 0554762]; US Department of Energy,
Office of Nuclear Physics [DE-FG02-88ER-40406, DE-AC02-06CH11357]
FX Special thanks to D. C. Radford and H. Q. Jin for their software
support. The authors thank J. Elson (WU) and J. Rohrer (ANL) for
technical support, J. P. Greene (ANL) for the preparation of the target,
and F. G. Kondev for useful discussions. This work is funded by the
National Science Foundation under grant no. PHY- 0554762 (USNA), as well
as by the US Department of Energy, Office of Nuclear Physics under
contract nos. DE-FG02-88ER-40406 (WU) and DE-AC02-06CH11357 (ANL).
NR 23
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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 NOV
PY 2008
VL 78
IS 5
AR 054319
DI 10.1103/PhysRevC.78.054319
PG 8
WC Physics, Nuclear
SC Physics
GA 376WR
UT WOS:000261214200028
ER
PT J
AU Horn, T
Qian, X
Arrington, J
Asaturyan, R
Benmokthar, F
Boeglin, W
Bosted, P
Bruell, A
Christy, ME
Chudakov, E
Clasie, B
Dalton, MM
Daniel, A
Day, D
Dutta, D
El Fassi, L
Ent, R
Fenker, H
Ferrer, J
Fomin, N
Gao, H
Garrow, K
Gaskell, D
Gray, C
Huber, GM
Jones, MK
Kalantarians, N
Keppel, CE
Kramer, K
Li, Y
Liang, Y
Lung, AF
Malace, S
Markowitz, P
Matsumura, A
Meekins, D
Mertens, T
Miyoshi, T
Mkrtchyan, H
Monson, R
Navasardyan, T
Niculescu, G
Niculescu, I
Okayasu, Y
Opper, AK
Perdrisat, C
Punjabi, V
Rauf, AW
Rodriguez, V
Rohe, D
Seely, J
Segbefia, E
Smith, GR
Sumihama, M
Tadevosyan, V
Tang, LG
Tvaskis, V
Villano, A
Vulcan, W
Wesselmann, FR
Wood, SA
Yuan, L
Zheng, XC
AF Horn, T.
Qian, X.
Arrington, J.
Asaturyan, R.
Benmokthar, F.
Boeglin, W.
Bosted, P.
Bruell, A.
Christy, M. E.
Chudakov, E.
Clasie, B.
Dalton, M. M.
Daniel, A.
Day, D.
Dutta, D.
El Fassi, L.
Ent, R.
Fenker, H.
Ferrer, J.
Fomin, N.
Gao, H.
Garrow, K.
Gaskell, D.
Gray, C.
Huber, G. M.
Jones, M. K.
Kalantarians, N.
Keppel, C. E.
Kramer, K.
Li, Y.
Liang, Y.
Lung, A. F.
Malace, S.
Markowitz, P.
Matsumura, A.
Meekins, D.
Mertens, T.
Miyoshi, T.
Mkrtchyan, H.
Monson, R.
Navasardyan, T.
Niculescu, G.
Niculescu, I.
Okayasu, Y.
Opper, A. K.
Perdrisat, C.
Punjabi, V.
Rauf, A. W.
Rodriguez, V.
Rohe, D.
Seely, J.
Segbefia, E.
Smith, G. R.
Sumihama, M.
Tadevosyan, V.
Tang, L. G.
Tvaskis, V.
Villano, A.
Vulcan, W.
Wesselmann, F. R.
Wood, S. A.
Yuan, L.
Zheng, X. C.
TI Scaling study of the pion electroproduction cross sections
SO PHYSICAL REVIEW C
LA English
DT Article
ID EXCLUSIVE ELECTROPRODUCTION; RESONANCE REGION; MESONS; PHOTOPRODUCTION;
HYDROGEN; ENERGIES; PHOTONS; ANGLES; QCD
AB The (1)H(e, e(')pi(+))n cross section was measured for arange of four-momentum transfer up to Q(2)=3.91 GeV(2) at values of the invariant mass W above the resonance region. The Q(2) dependence of the longitudinal component was found to be consistent with the Q(2)-scaling prediction for hard exclusive processes. This suggests that the QCD factorization theorem is applicable at rather low values of Q(2). The transverse term falls off slower than the naive Q(-8) expectation and remains appreciable even at Q(2)=3.91 GeV(2).
C1 [Horn, T.; Bosted, P.; Bruell, A.; Chudakov, E.; Ent, R.; Fenker, H.; Gaskell, D.; Jones, M. K.; Keppel, C. E.; Lung, A. F.; Meekins, D.; Smith, G. R.; Tang, L. G.; Vulcan, W.; Wood, S. A.] TJNAF, Div Phys, Newport News, VA 23606 USA.
[Qian, X.; Gao, H.; Kramer, K.] Duke Univ, Triangle Univ Nucl Lab, Durham, NC 27708 USA.
[Arrington, J.; El Fassi, L.; Zheng, X. C.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Asaturyan, R.; Mkrtchyan, H.; Navasardyan, T.; Tadevosyan, V.] Yerevan Phys Inst, Yerevan 375036, Armenia.
[Benmokthar, F.] Univ Maryland, College Pk, MD 20742 USA.
[Boeglin, W.; Markowitz, P.] Florida Int Univ, Miami, FL 33119 USA.
[Christy, M. E.; Keppel, C. E.; Malace, S.; Segbefia, E.; Tang, L. G.; Yuan, L.] Hampton Univ, Hampton, VA 23668 USA.
[Clasie, B.; Seely, J.] MIT, Cambridge, MA 02139 USA.
[Dalton, M. M.; Gray, C.] Univ Witwatersrand, Johannesburg, South Africa.
[Daniel, A.; Kalantarians, N.; Li, Y.; Rodriguez, V.] Univ Houston, Houston, TX 77204 USA.
[Day, D.; Fomin, N.] Univ Virginia, Charlottesville, VA 22904 USA.
[Dutta, D.] Mississippi State Univ, Mississippi State, MS 39762 USA.
[Ferrer, J.; Niculescu, G.; Niculescu, I.] James Madison Univ, Harrisonburg, VA 22807 USA.
[Garrow, K.] TRIUMF, Vancouver, BC V6T 2A3, Canada.
[Huber, G. M.] Univ Regina, Regina, SK S4S 0A2, Canada.
[Liang, Y.] American Univ, Washington, DC 20016 USA.
[Matsumura, A.; Miyoshi, T.; Okayasu, Y.; Sumihama, M.] Tohoku Univ, Sendai, Miyagi 980, Japan.
[Mertens, T.; Rohe, D.] Univ Basel, Basel, Switzerland.
[Monson, R.] Cent Michigan Univ, Mt Pleasant, MI 48859 USA.
[Opper, A. K.] Ohio Univ, Athens, OH 45071 USA.
[Perdrisat, C.] Coll William & Mary, Williamsburg, VA 23187 USA.
[Punjabi, V.; Wesselmann, F. R.] Norfolk State Univ, Norfolk, VA USA.
[Rauf, A. W.] Univ Manitoba, Winnipeg, MB R3T 2N2, Canada.
[Tvaskis, V.] Vrije Univ Amsterdam, Fac Nat Sterrenkunde, NL-1081 HV Amsterdam, Netherlands.
[Villano, A.] Rensselaer Polytech Inst, Troy, NY 12180 USA.
RP Horn, T (reprint author), TJNAF, Div Phys, Newport News, VA 23606 USA.
RI Gao, Haiyan/G-2589-2011; Arrington, John/D-1116-2012; Mertens,
Thomas/E-9826-2013; Day, Donal/C-5020-2015; Dalton, Mark/B-5380-2016
OI Arrington, John/0000-0002-0702-1328; Day, Donal/0000-0001-7126-8934;
Dalton, Mark/0000-0001-9204-7559
FU US Department of Energy [DE-AC05-84150]; US National Science Foundation;
Natural Sciences and Engineering Research Council of Canada
FX We thank S. Brodsky and A. Radyushkin for helpful discussions. This work
was supported in part by the US Department of Energy. The Southeastern
Universities Research Association ( SURA) operates the Thomas Jefferson
National Accelerator Facility for the US Department of Energy under
Contract DE-AC05-84150. We acknowledge additional research grants from
the US National Science Foundation and the Natural Sciences and
Engineering Research Council of Canada.
NR 26
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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 NOV
PY 2008
VL 78
IS 5
AR 058201
DI 10.1103/PhysRevC.78.058201
PG 4
WC Physics, Nuclear
SC Physics
GA 376WR
UT WOS:000261214200060
ER
PT J
AU Kawano, T
Moller, P
Wilson, WB
AF Kawano, T.
Moeller, P.
Wilson, W. B.
TI Calculation of delayed-neutron energy spectra in a quasiparticle
random-phase approximation-Hauser-Feshbach model
SO PHYSICAL REVIEW C
LA English
DT Article
ID BETA-STRENGTH FUNCTIONS; SEPARATED FISSION-PRODUCTS; GROSS PROPERTIES;
PRECURSORS; EMISSION; FORMULA; I-137; DECAY
AB Theoretical beta-delayed-neutron spectra are calculated based on the Quasiparticle Random-Phase Approximation (QRPA) and the Hauser-Feshbach statistical model. Neutron emissions from an excited daughter nucleus after beta decay to the granddaughter residual are more accurately calculated than in previous evaluations, including all the microscopic nuclear structure information, such as a Gamow-Teller strength distribution and discrete states in the granddaughter. The calculated delayed-neutron spectra agree reasonably well with those evaluations in the ENDF decay library, which are based on experimental data. The model was adopted to generate the delayed-neutron spectra for all 271 precursors.
C1 [Kawano, T.; Moeller, P.; Wilson, W. B.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Kawano, T (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM kawano@lanl.gov
OI Moller, Peter/0000-0002-5848-3565
FU National Nuclear Security Administration of the U. S. Department of
Energy at Los Alamos National Laboratory [DE-AC5206NA25396]
FX We thank G. W. McKinney and L. Waters of Los Alamos National Laboratory
for encouraging this work. This work was carried out under the auspices
of the National Nuclear Security Administration of the U. S. Department
of Energy at Los Alamos National Laboratory under Contract
DE-AC5206NA25396.
NR 32
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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 NOV
PY 2008
VL 78
IS 5
AR 054601
DI 10.1103/PhysRevC.78.054601
PG 8
WC Physics, Nuclear
SC Physics
GA 376WR
UT WOS:000261214200033
ER
PT J
AU Lindenbaum, SJ
Longacre, RS
AF Lindenbaum, S. J.
Longacre, R. S.
TI Centrality dependence of the parton bubble model for high-energy
heavy-ion collisions and fireball surface substructure at energies
available at the BNL relativistic heavy ion collider (RHIC)
SO PHYSICAL REVIEW C
LA English
DT Article
ID QUARK-GLUON PLASMA; NUCLEAR COLLISIONS; HADRONIZATION
AB In an earlier paper we developed a QCD-inspired theoretical parton bubble model (PBM) for RHIC/LHC. The motivation for the PBM was to develop a model that would reasonably quantitatively agree with the strong charged particle pair correlations observed by the STAR Collaboration at RHIC in Au+Au central collisions at root s(NN)=200 GeV in the transverse momentum range 0.8 to 2.0 GeV/c. The model was constructed to also agree with the Hanbury Brown and Twiss (HBT) observed small final-state source size similar to 2 fm radii in the transverse momentum range above 0.8 GeV/c. The model assumed a substructure of a ring of localized adjoining similar to 2 fm radius bubbles perpendicular to the collider beam direction, centered on the beam, at midrapidity. The bubble ring was assumed to be located on the expanding fireball surface of the Au+Au collision. These bubbles consist almost entirely of gluons and form gluonic hot spots on the fireball surface. We achieved a reasonable quantitative agreement with the results of both the physically significant charge-independent (CI) and charge-dependent (CD) correlations that were observed. In this paper we extend the model to include the changing development of bubbles with centrality from the most central region where bubbles are very important to the most peripheral where the bubbles are gone. Energy density is found to be related to bubble formation and as centrality decreases the maximum energy density and bubbles shift from symmetry around the beam axis to the reaction plane region, causing a strong correlation of bubble formation with elliptic flow. We find reasonably quantitative agreement (within a few percent of the total correlations) with a new precision RHIC experiment that extended the centrality region investigated to the range 0%-80% (most central to most peripheral). The characteristics and behavior of the bubbles imply they represent a significant substructure formed on the surface of the fireball at kinetic freezeout.
C1 [Lindenbaum, S. J.] CUNY City Coll, New York, NY 10031 USA.
[Lindenbaum, S. J.; Longacre, R. S.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Lindenbaum, SJ (reprint author), CUNY City Coll, New York, NY 10031 USA.
FU U.S. Department of Energy [DE-AC02-98CH10886]; City College of New York
Physics Department of the City University of New York
FX The authors thank William Love for valuable discussion and assistance in
production of figures. This research was supported by the U.S.
Department of Energy under Contract No. DE-AC02-98CH10886 and the City
College of New York Physics Department of the City University of New
York.
NR 28
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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 NOV
PY 2008
VL 78
IS 5
AR 054904
DI 10.1103/PhysRevC.78.054904
PG 15
WC Physics, Nuclear
SC Physics
GA 376WR
UT WOS:000261214200046
ER
PT J
AU Papenbrock, T
Weidenmuller, HA
AF Papenbrock, T.
Weidenmueller, H. A.
TI Abundance of ground states with positive parity
SO PHYSICAL REVIEW C
LA English
DT Article
ID PHYSICS; SPECTRA; SYSTEMS
AB We investigate analytically and numerically a random-matrix model for m fermions occupying center dot(1) single-particle states with positive parity and center dot(2) single-particle states with negative parity and interacting through random two-body forces that conserve parity. The single-particle states are completely degenerate and carry no further quantum numbers. We compare spectra of many-body states with positive and with negative parity. We show that in the dilute limit defined by m,center dot(1,2)->infinity and m/center dot(1,2)-> 0, ground states with positive and negative parity occur with equal probability. Differences in the ground-state probabilities are, thus, a finite-size effect and are mainly due to different dimensions of the Hilbert spaces of either parity.
C1 [Papenbrock, T.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Papenbrock, T.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
[Weidenmueller, H. A.] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany.
RP Papenbrock, T (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
OI Papenbrock, Thomas/0000-0001-8733-2849
FU U. S. Department of Energy [DE-AC05-00OR22725]; University of Tennessee
[DE-FG02-96ER40963]
FX This work was partially supported by the U. S. Department of Energy
under Contract No. DE-AC05-00OR22725 with UT-Battelle, LLC (Oak Ridge
National Laboratory), and under Grant No. DE-FG02-96ER40963 (University
of Tennessee).
NR 14
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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 NOV
PY 2008
VL 78
IS 5
AR 054305
DI 10.1103/PhysRevC.78.054305
PG 9
WC Physics, Nuclear
SC Physics
GA 376WR
UT WOS:000261214200014
ER
PT J
AU Swiatecki, WJ
Siwek-Wilczynska, K
Wilczynski, J
AF Swiatecki, W. J.
Siwek-Wilczynska, K.
Wilczynski, J.
TI Ratios of disintegration rates for distinct decay modes of an excited
nucleus
SO PHYSICAL REVIEW C
LA English
DT Article
ID SUPERHEAVY NUCLEI; CROSS-SECTIONS; FISSION; DEPENDENCE; DYNAMICS
AB This paper examines a prevalent departure from the standard transition-state treatment of Gamma(n)/Gamma(f), the relative rate of disintegration of an excited nucleus by neutron emission or fission. This departure is caused by what we believe is an erroneous treatment of shell structure corrections. According to the transition-state theory the shell correction in the excited compound nucleus cancels out identically in the ratio Gamma(n)/Gamma(f), whereas in the deviant treatment it leads to an energy-dependent fission barrier that modifies the expression for the partial width Gamma(f). Moreover, according to the transition-state theory, the partial width Gamma(n) depends on the shell effect in the residual nucleus that emitted the neutron, whereas in the deviant treatment this dependence is ignored. We illustrate explicitly the magnitude of the errors that the deviant treatment of Gamma(n)/Gamma(f) generates in typical nuclear reactions, errors that can reach orders of magnitude at low excitation energies. We take the opportunity to describe an accurate algebraic method of evaluating integrals over shell-affected level densities that appear in the transition-state theory. We also present a new derivation of Weisskopf's nucleon evaporation formula, based on the transition-state method rather than on the statistical principle of detailed balance used by Weisskopf. This unifies the theoretical treatments of fission and nucleon evaporation.
C1 [Swiatecki, W. J.] Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
[Siwek-Wilczynska, K.] Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland.
[Wilczynski, J.] Andrzej Soltan Inst Nucl Studies, PL-05400 Otwock, Poland.
RP Swiatecki, WJ (reprint author), Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
NR 30
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD NOV
PY 2008
VL 78
IS 5
AR 054604
DI 10.1103/PhysRevC.78.054604
PG 10
WC Physics, Nuclear
SC Physics
GA 376WR
UT WOS:000261214200036
ER
PT J
AU Timofeyuk, NK
Thompson, IJ
AF Timofeyuk, N. K.
Thompson, I. J.
TI Spectroscopic factors and asymptotic normalization coeffcients in mirror
three-body systems
SO PHYSICAL REVIEW C
LA English
DT Article
AB Using a three-body model, we study the dependence of spectroscopic factors for the overlap integrals < core + N vertical bar core + N + N > on the binding energy of the core + N subsystem, considering as prototypes (6)He, (6)Be, (9)Li, (9)C, (18)O, and (18)Ne. We show that at small N-core binding energies these spectroscopic factors can be strongly influenced by the geometrical mismatch between the two-body N-core wave function that stretches into the classically forbidden region and the spatially confined three- body function. This mismatch comes from the strong two-body correlations between the nucleons outside the core and due to the core recoil effects. The mismatch leads to symmetry breaking in mirror spectroscopic factors that in some cases can be large enough to be observed in nucleon removal reactions. It is also responsible for deviations of the ratios of mirror asymptotic normalization coefficients (ANCs) from the simple model-independent analytical estimates. We discuss the influence of such mirror symmetry breaking on the prediction of direct stellar (p, gamma) reactions from the measured mirror neutron ANCs.
C1 [Timofeyuk, N. K.] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England.
[Thompson, I. J.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Timofeyuk, NK (reprint author), Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England.
FU Department of Energy; Lawrence Livermore national Laboratory;
[EP/C520521/1]; [EP/E036627/1]; [DE-AC52-07NA27344]
FX N.K.T. thanks L. Grigorenko for useful discussions. This work was
performed under the UK grants EP/C520521/1 and EP/E036627/1 and in the
Lawrence Livermore National Laboratory under Department of Energy
contract DE-AC52-07NA27344.
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SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD NOV
PY 2008
VL 78
IS 5
AR 054322
DI 10.1103/PhysRevC.78.054322
PG 10
WC Physics, Nuclear
SC Physics
GA 376WR
UT WOS:000261214200031
ER
PT J
AU Torres, DA
Cristancho, F
Andersson, LL
Johansson, EK
Rudolph, D
Fahlander, C
Ekman, J
du Rietz, R
Andreoiu, C
Carpenter, MP
Seweryniak, D
Zhu, S
Charity, RJ
Chiara, CJ
Hoel, C
Pechenaya, OL
Reviol, W
Sarantites, DG
Sobotka, LG
Baktash, C
Yu, CH
Carlsson, BG
Ragnarsson, I
AF Torres, D. A.
Cristancho, F.
Andersson, L. -L.
Johansson, E. K.
Rudolph, D.
Fahlander, C.
Ekman, J.
du Rietz, R.
Andreoiu, C.
Carpenter, M. P.
Seweryniak, D.
Zhu, S.
Charity, R. J.
Chiara, C. J.
Hoel, C.
Pechenaya, O. L.
Reviol, W.
Sarantites, D. G.
Sobotka, L. G.
Baktash, C.
Yu, C. -H.
Carlsson, B. G.
Ragnarsson, I.
TI Deformations and magnetic rotations in the (60)Ni nucleus
SO PHYSICAL REVIEW C
LA English
DT Article
ID GAMMA-RAY SPECTROSCOPY; FUSION-EVAPORATION REACTIONS; 60 MASS REGION;
HIGH-SPIN; SHELL-MODEL; SMOOTH TERMINATION; CHANNEL-SELECTION; BANDS;
ENERGIES; COLLECTIVITY
AB Data from three experiments using the heavy-ion fusion evaporation-reaction (36)Ar+(28)Si have been combined to study high-spin states in the residual nucleus (60)Ni, which is populated via the evaporation of four protons from the compound nucleus (64)Ge. The GAMMASPHERE array was used for all the experiments in conjunction with a 4 pi charged-particle detector arrays (MICROBALL, LUWUSIA) and neutron detectors (NEUTRON SHELL) to allow for the detection of. rays in coincidence with the evaporated particles. An extended (60)Ni level scheme is presented, comprising more than 270 gamma-ray transitions and 110 excited states. Their spins and parities have been assigned via directional correlations of gamma rays emitted from oriented states. Spherical shell-model calculations in the fp-shell characterize some of the low-spin states, while the experimental results of the rotational bands are analyzed with configuration-dependent cranked Nilsson-Strutinsky calculations.
C1 [Torres, D. A.; Cristancho, F.] Univ Nacl Colombia, Dept Fis, Bogota, Colombia.
[Andersson, L. -L.; Johansson, E. K.; Rudolph, D.; Fahlander, C.; Ekman, J.; du Rietz, R.] Lund Univ, Dept Phys, S-22100 Lund, Sweden.
[Andreoiu, C.] Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada.
[Carpenter, M. P.; Seweryniak, D.; Zhu, S.] Argonne Natl Lab, Div Phys, Argonne, IL 60493 USA.
[Charity, R. J.; Chiara, C. J.; Hoel, C.; Pechenaya, O. L.; Reviol, W.; Sarantites, D. G.; Sobotka, L. G.] Washington Univ, Dept Chem, St Louis, MO 63130 USA.
[Baktash, C.; Yu, C. -H.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
[Carlsson, B. G.; Ragnarsson, I.] Lund Inst Technol, Dept Math Phys, S-22100 Lund, Sweden.
RP Torres, DA (reprint author), Univ W Scotland, Sch Sci & Engn, High St, Paisley PA1 2BE, Renfrew, Scotland.
EM Diego.Torres@uws.ac.uk
RI Rudolph, Dirk/D-4259-2009; Ekman, Jorgen/C-1385-2013; du Rietz,
Rickard/I-3794-2013; Carpenter, Michael/E-4287-2015
OI Rudolph, Dirk/0000-0003-1199-3055; du Rietz,
Rickard/0000-0002-9884-9058; Carpenter, Michael/0000-0002-3237-5734
FU Instituto Colombiano para el Avance de la Ciencia (Colciencias); Swedish
Institute; Swedish Research Council; U. S. DOE [DE-AC05-000R22725]
FX We would like to thank the staff and the accelerator crew at ANL and
LBNL and also D. P. Balamuth, M. Devlin, J. Eberth, A. Galindo-Uribarri,
P. A. Hausladen, L. L. Riedinger, and Th. Steinhardt for the help and
support during the experiments. This research was supported in part by
the Instituto Colombiano para el Avance de la Ciencia (Colciencias) and
the Swedish Institute (D. A. Torres), the Swedish Research Council, and
the U. S. DOE grant DE-AC05-000R22725.
NR 59
TC 25
Z9 27
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 NOV
PY 2008
VL 78
IS 5
AR 054318
DI 10.1103/PhysRevC.78.054318
PG 24
WC Physics, Nuclear
SC Physics
GA 376WR
UT WOS:000261214200027
ER
PT J
AU Vinodkumar, AM
Loveland, W
Neeway, JJ
Prisbrey, L
Sprunger, PH
Peterson, D
Liang, JF
Shapira, D
Gross, CJ
Varner, RL
Kolata, JJ
Roberts, A
Caraley, AL
AF Vinodkumar, A. M.
Loveland, W.
Neeway, J. J.
Prisbrey, L.
Sprunger, P. H.
Peterson, D.
Liang, J. F.
Shapira, D.
Gross, C. J.
Varner, R. L.
Kolata, J. J.
Roberts, A.
Caraley, A. L.
TI (132)Sn+(96)Zr reaction: A study of fusion enhancement/hindrance
SO PHYSICAL REVIEW C
LA English
DT Article
ID RESIDUE CROSS-SECTIONS; SUBBARRIER FUSION; NUCLEAR SYSTEMS;
QUASI-FISSION; NEUTRON-FLOW; HEAVY-NUCLEI; ION; COLLISIONS; DYNAMICS;
BARRIER
AB Capture-fission cross sections were measured for the collision of the massive nucleus (132)Sn with (96)Zr at center-of-mass energies ranging from 192.8 to 249.6 MeV in an attempt to study fusion enhancement and hindrance in this reaction involving very neutron-rich nuclei. Coincident fission fragments were detected using silicon detectors. Using angle and energy conditions, deep inelastic scattering events were separated from fission events. Coupled-channels calculations can describe the data if the surface diffuseness parameter, a, is allowed to be 1.10 fm instead of the customary 0.6 fm. The measured capture-fission cross sections agree moderately well with model calculations using the dinuclear system model. If we use this model to predict fusion barrier heights for these reactions, we find the predicted fusion hindrance, as represented by the extra push energy, is greater for the more neutron-rich system, lessening the advantage of the lower interaction barriers with neutron-rich projectiles.
C1 [Vinodkumar, A. M.; Loveland, W.; Neeway, J. J.; Prisbrey, L.; Sprunger, P. H.] Oregon State Univ, Dept Chem, Corvallis, OR 97331 USA.
[Peterson, D.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
[Liang, J. F.; Shapira, D.; Gross, C. J.; Varner, R. L.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
[Kolata, J. J.; Roberts, A.] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
[Caraley, A. L.] SUNY Coll Oswego, Dept Phys, Oswego, NY 13126 USA.
RP Vinodkumar, AM (reprint author), Oregon State Univ, Dept Chem, Gilbert Hall 153, Corvallis, OR 97331 USA.
EM attukalv@onid.orst.edu
RI Attukalathil, Vinodkumar/A-7441-2009;
OI Attukalathil, Vinodkumar/0000-0002-8204-7800; Neeway,
Jim/0000-0001-7046-8408
FU US Department of Energy [DE-FG06-97ER41026]; National Science Foundation
[PHY03-54828]; [W31-109ENG-38]
FX We thank Giardina, Mandaglio, and Nasirov for furnishing the results of
their calculations prior to their publication. This work was supported
in part by the Director, Office of Energy Research, Division of Nuclear
Physics of the Office of High Energy and Nuclear Physics of the US
Department of Energy under grant DE-FG06-97ER41026 and contract no.
W31-109ENG-38 and by the National Science Foundation under NSF grant no.
PHY03-54828.
NR 48
TC 13
Z9 13
U1 0
U2 4
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 NOV
PY 2008
VL 78
IS 5
AR 054608
DI 10.1103/PhysRevC.78.054608
PG 7
WC Physics, Nuclear
SC Physics
GA 376WR
UT WOS:000261214200040
ER
PT J
AU Wong, CY
AF Wong, Cheuk-Yin
TI Landau hydrodynamics reexamined
SO PHYSICAL REVIEW C
LA English
DT Article
ID HEAVY-ION COLLISIONS; RELATIVISTIC NUCLEAR COLLISIONS; MULTIPLE
PRODUCTION; PP INTERACTIONS; MODEL; PARTICLES; FLOW
AB We review the formulation of Landau hydrodynamics and find that the rapidity distribution of produced particles in the center-of-mass system should be more appropriately modified as dN/dy proportional to exp{root y(b)(2) - y(2)}, where y(b) = ln{root S-NN/m(p)} is the beam nucleon rapidity, instead of Landau's original distribution, dN/dy(Landau) proportional to exp{root L-2 - y(2)}, where L = ln{root S-NN/2m(p)}. The modified distribution agrees better with experimental dN/dy data than the original Landau distribution and can be represented well by the Gaussian distribution, dN/dy(Gaussian) proportional to exp{-y(2)/2L}. Past successes of the Gaussian distribution in explaining experimental rapidity data can be understood, not because it is an approximation of the original Landau distribution, but because it is in fact a close representation of the modified distribution. Predictions for pp and AA collisions at LHC energies in Landau hydrodynamics are presented.
C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
RP Wong, CY (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
EM wongc@ornl.gov
OI Wong, Cheuk-Yin/0000-0001-8223-0659
FU U.S. Department of Energy; Division of Nuclear Physics;
[DE-AC05-00OR22725]
FX The author thanks Professor D. Blaschke for his hospitality at the
Helmholtz international Summer School, July 12-26, 2008, Bogoliubov
Laboratory of Theoretial Physics, Dubna, Russia, where this work on
Landau hydrodynamics was initiated as lecture notes. This research was
supported in part by the Division of Nuclear Physics, U.S. Department of
Energy, under Contract DE-AC05-00OR22725, managed by UT-Battelle, LLC.
NR 44
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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 NOV
PY 2008
VL 78
IS 5
AR 054902
DI 10.1103/PhysRevC.78.054902
PG 10
WC Physics, Nuclear
SC Physics
GA 376WR
UT WOS:000261214200044
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
Kukartsev, G
Lynch, G
Osipenkov, IL
Ronan, MT
Tackmann, K
Tanabe, T
Hawkes, CM
Soni, N
Watson, AT
Koch, H
Schroeder, T
Walker, D
Asgeirsson, DJ
Cuhadar-Donszelmann, T
Fulsom, BG
Hearty, C
Mattison, TS
McKenna, JA
Barrett, M
Khan, A
Teodorescu, L
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
Schalk, T
Schumm, BA
Seiden, A
Wang, L
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
Blanc, F
Bloom, PC
Ford, WT
Gaz, A
Hirschauer, JF
Kreisel, A
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
Sundermann, JE
Volk, A
Bernard, D
Bonneaud, GR
Latour, E
Thiebaux, C
Verderi, M
Clark, PJ
Gradl, W
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
Dubitzky, RS
Marks, J
Schenk, S
Uwer, U
Klose, V
Lacker, HM
De Nardo, G
Lista, L
Monorchio, D
Onorato, G
Sciacca, C
Bard, DJ
Dauncey, PD
Nash, JA
Vazquez, WP
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
Denig, AG
Fritsch, M
Schott, G
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
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
Alwyn, KE
Barlow, NR
Barlow, RJ
Chia, YM
Edgar, CL
Lafferty, GD
West, TJ
Yi, JI
Anderson, J
Chen, C
Jawahery, A
Roberts, DA
Simi, G
Tuggle, JM
Dallapiccola, C
Hertzbach, SS
Li, X
Salvati, E
Saremi, S
Cowan, R
Dujmic, D
Fisher, PH
Koeneke, K
Sciolla, G
Spitznagel, M
Taylor, F
Yamamoto, RK
Zhao, M
Mclachlin, SE
Patel, PM
Robertson, SH
Lazzaro, A
Lombardo, V
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
Godang, R
Kroeger, R
Sanders, DA
Summers, DJ
Zhao, HW
Simard, M
Taras, P
Viaud, FB
Nicholson, H
Baak, MA
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
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
Biesiada, J
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
Roethel, W
Wilson, FF
Emery, S
Escalier, M
Esteve, L
Gaidot, A
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
Bula, R
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.
Garra Tico, J.
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.
Kukartsev, 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.
Cuhadar-Donszelmann, T.
Fulsom, B. G.
Hearty, C.
Mattison, T. S.
McKenna, J. A.
Barrett, M.
Khan, A.
Teodorescu, L.
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.
Schalk, T.
Schumm, B. A.
Seiden, A.
Wang, L.
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.
Blanc, F.
Bloom, P. C.
Ford, W. T.
Gaz, A.
Hirschauer, J. F.
Kreisel, A.
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.
Sundermann, J. E.
Volk, A.
Bernard, D.
Bonneaud, G. R.
Latour, E.
Thiebaux, Ch.
Verderi, M.
Clark, P. J.
Gradl, W.
Playfer, S.
Watson, J. E.
Andreotti, M.
Bettoni, D.
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CA BaBar Collaboration
TI Measurement of ratios of branching fractions and CP-violating
asymmetries of B(+/-) -> D*K(+/-) decays
SO PHYSICAL REVIEW D
LA English
DT Article
AB We report a study of B(+/-) -> D*K(+/-) decays with D* decaying to D pi(0) or D gamma, using 383 x 10(6) B (B) over bar pairs collected at the Y(4S) resonance with the BABAR detector at the SLAC PEP-II B Factory. The D meson decays under study include a non-CP mode (K(+/-) pi(-/+)), CP-even modes (K(+/-)K(-/+), pi(+/-)pi(-/+)), and CP-odd modes (K(s)(0)pi(0), K(s)(0)phi, K(s)(0)omega).We measure ratios (R*(CP +/-)) of branching fractions of decays to CP eigenmode states and to flavor-specific states as well as CP asymmetries (A*(CP +/-)) These measurements are sensitive to the unitarity triangle angle gamma. We obtain A*(CP+) = -0.11 +/- 0.09 +/- 0.01, R*(CP) = 1.31 +/- 0.13 +/- 0.04, and A*(CP-) = 0.06 +/- 0.10 +/- 0.02, R(CP-)(*) = 1.10 +/- 0.12 +/- 0.04, where the first error is statistical and the second error is systematic. Translating our results into an alternative parametrization, widely used for related measurements, we obtain x(+)* = 0. 11 +/- 0.06 +/- 0.02 and x(-)* = 0.00 +/- 0.06 +/- 0.02. No significant CP-violating charge asymmetry is found in either the flavor-specific mode D -> K(+/-) pi(-/+) or in B(+/-) -> D*pi(+/-) decays.
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[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.; Ferroni, F.; Gaspero, M.; Polci, F.; 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.; Roethel, W.; Wilson, F. F.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Emery, S.; Escalier, M.; Esteve, L.; Gaidot, A.; Ganzhur, S. F.; de Monchenault, G. Hamel; Kozanecki, W.; Vasseur, G.; Yeche, Ch.; Zito, M.] CEA Saclay, DSM Dapnia, 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.; Bula, R.; 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, Dipartmento 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.; Pierini, M.; Prepost, R.; Vuosalo, C. O.; Wu, S. L.] Univ Wisconsin, Madison, WI 53706 USA.
RP Aubert, B (reprint author), CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
RI dong, liaoyuan/A-5093-2015; Rizzo, Giuliana/A-8516-2015; 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; 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; Oyanguren,
Arantza/K-6454-2014
OI Faccini, Riccardo/0000-0003-2613-5141; Cavoto,
Gianluca/0000-0003-2161-918X; Barlow, Roger/0000-0002-8295-8612; Raven,
Gerhard/0000-0002-2897-5323; Bettarini, Stefano/0000-0001-7742-2998;
Cibinetto, Gianluigi/0000-0002-3491-6231; dong,
liaoyuan/0000-0002-4773-5050; Pacetti, Simone/0000-0002-6385-3508;
Covarelli, Roberto/0000-0003-1216-5235; Rizzo,
Giuliana/0000-0003-1788-2866; Paoloni, Eugenio/0000-0001-5969-8712;
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; 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; Oyanguren, Arantza/0000-0002-8240-7300
NR 34
TC 51
Z9 51
U1 0
U2 4
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 NOV
PY 2008
VL 78
IS 9
AR 092002
DI 10.1103/PhysRevD.78.092002
PG 13
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 376WO
UT WOS:000261213900007
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
Schroeder, 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
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.
Garra Tico, J.
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.
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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.
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Thompson, J. M.
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Wagner, A. P.
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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 Observation of B(0) -> chi(c0)K*(0) and evidence for B(+) ->
chi(c0)K*(+)
SO PHYSICAL REVIEW D
LA English
DT Article
ID MESONS; DECAYS
AB We present the observation of the decay B(0) -> chi(c0)K(*0) as well as evidence of B(+) -> chi(c0)K(*+), with an 8.9 and a 3.6 standard deviation significance, respectively, using a data sample of 454 X 10(6) Y(4S) -> B (B) over bar decays collected with the BABAR detector at the PEP-II B meson factory located at the Stanford Linear Accelerator Center (SLAC). The measured branching fractions are B(B(0) -> chi(c0)K(*0)) = (1.7 +/- 0.3 +/- 0.2) x 10(-4) and B(B(+) -> chi(c0)K(*+)) = (1.4 +/- 0.5 +/- 0.2) x 10(-4), where the first quoted errors are statistical and the second are systematic. We obtain a branching fraction upper limit of B(B(+) -> chi(c0)K(*+)) < 2.1 x 10(-4) at the 90% confidence level.
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[Walker, D.] Univ Bristol, Bristol BS8 1TL, Avon, England.
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[Ebert, M.; Hartmann, T.; Schroeder, H.; Waldi, R.] Univ Rostock, D-18051 Rostock, Germany.
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[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 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.; 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, 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; 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; Monge, Maria
Roberta/G-9127-2012;
OI 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;
Corwin, Luke/0000-0001-7143-3821; 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; Monge, Maria Roberta/0000-0003-1633-3195;
Lanceri, Livio/0000-0001-8220-3095; Ebert, Marcus/0000-0002-3014-1512;
Hamel de Monchenault, Gautier/0000-0002-3872-3592; 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; Strube, Jan/0000-0001-7470-9301;
Chen, Chunhui /0000-0003-1589-9955
NR 14
TC 3
Z9 3
U1 0
U2 5
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 NOV
PY 2008
VL 78
IS 9
AR 091101
DI 10.1103/PhysRevD.78.091101
PG 8
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 376WO
UT WOS:000261213900001
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
Li Gioi, L
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.
Garra Tico, J.
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.
Li Gioi, L.
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 Time-dependent and time-integrated angular analysis of B -> phi
K-S(0)pi(0) and phi K-+/-pi(-/+)
SO PHYSICAL REVIEW D
LA English
DT Article
ID DIRECT CP VIOLATION; NEUTRAL KAON; DECAY B->VV; POLARIZATION; PHYSICS;
ASYMMETRIES; SCATTERING; MESON
AB We perform a time-dependent and time-integrated angular analysis of the decays B-0 -> phi K*(892)(0), phi K-2*(1430)(0), and phi(K pi)(0)*(0) with the final sample of about 465 x 10(6) B (B) over bar pairs recorded with the BABAR detector. Twenty-four parameters are investigated, including the branching fractions, CP-violation parameters, and parameters sensitive to final-state interactions. We use the dependence on the K pi invariant mass of the interference between the scalar and vector or tensor components to resolve discrete ambiguities of the strong and weak phases. We use the time evolution of the B -> phi K-S(0)pi(0) channel to extract the CP-violation phase difference Delta phi(00) = 0.28 +/- 0.42 +/- 0.04 between the B and (B) over bar decay amplitudes. When the B -> pi K-+/-pi(-/+) channel is included, the fractions of longitudinal polarization f(L) of the vector-vector and vector-tensor decay modes are measured to be 0.494 +/- 0.034 +/- 0.013 and 0.901(-0.058)(+0.046) +/- 0.037, respectively. This polarization pattern requires the presence of a positive-helicity amplitude in the vector-vector decay from a currently unknown source.
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[Ebert, M.; Hartmann, T.; Schroeder, H.; Waldi, R.] Univ Rostock, D-18051 Rostock, Germany.
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[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, Dipartmento 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.; Pierini, M.; Prepost, R.; Vuosalo, C. O.; Wu, S. L.] Univ Wisconsin, Madison, WI 53706 USA.
RP Aubert, B (reprint author), CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
RI 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; Monge, Maria Roberta/G-9127-2012; Oyanguren,
Arantza/K-6454-2014; Luppi, Eleonora/A-4902-2015; 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; Lusiani, Alberto/A-3329-2016; Morandin,
Mauro/A-3308-2016; Di Lodovico, Francesca/L-9109-2016; Pappagallo,
Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey,
Raymond/E-2830-2016; dong, liaoyuan/A-5093-2015; Rizzo,
Giuliana/A-8516-2015;
OI Raven, Gerhard/0000-0002-2897-5323; 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; Monge, Maria Roberta/0000-0003-1633-3195;
Oyanguren, Arantza/0000-0002-8240-7300; Luppi,
Eleonora/0000-0002-1072-5633; 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; 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; Bettarini,
Stefano/0000-0001-7742-2998; Cibinetto, Gianluigi/0000-0002-3491-6231;
dong, liaoyuan/0000-0002-4773-5050; Pacetti, Simone/0000-0002-6385-3508;
Covarelli, Roberto/0000-0003-1216-5235; Rizzo,
Giuliana/0000-0003-1788-2866; Paoloni, Eugenio/0000-0001-5969-8712;
Faccini, Riccardo/0000-0003-2613-5141
NR 76
TC 42
Z9 42
U1 0
U2 6
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 NOV
PY 2008
VL 78
IS 9
AR 092008
DI 10.1103/PhysRevD.78.092008
PG 27
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 376WO
UT WOS:000261213900013
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.
Garra Tico, J.
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 Search for the highly suppressed decays B- -> K+pi(-)pi(-) and B- ->
K-K-pi(+)
SO PHYSICAL REVIEW D
LA English
DT Article
ID PHYSICS
AB We report a search for the decays B- -> K+pi(-)pi(-) and B- -> K-K-pi(+), which are highly suppressed in the standard model. Using a sample of (467 +/- 5) x 10(6) B (B) over bar pairs collected with the BABAR detector, we do not see any evidence of these decays and determine 90% confidence level upper limits of B(B- -> K+pi(-)pi(-)) and < 9.5 x 10(-7) B(B- -> K-K-pi(+)) and < 1.6 x 10(-7) on the corresponding branching fractions, including systematic uncertainties.
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[Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.] Univ Savoie, F-74941 Annecy Le Vieux, France.
[Garra Tico, J.; 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.
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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, 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.
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[Carpinelli, M.] Univ Sassari, I-07100 Sassari, 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.
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[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.
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[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, Dipartmento 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.; Pierini, M.; Prepost, R.; Vuosalo, C. O.; Wu, S. L.] Univ Wisconsin, Madison, WI 53706 USA.
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; 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; de Sangro, Riccardo/J-2901-2012; Saeed, Mohammad
Alam/J-7455-2012; dong, liaoyuan/A-5093-2015; Rizzo,
Giuliana/A-8516-2015;
OI 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; 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; de Sangro,
Riccardo/0000-0002-3808-5455; Saeed, Mohammad Alam/0000-0002-3529-9255;
Raven, Gerhard/0000-0002-2897-5323; Cibinetto,
Gianluigi/0000-0002-3491-6231; dong, liaoyuan/0000-0002-4773-5050;
Pacetti, Simone/0000-0002-6385-3508; Covarelli,
Roberto/0000-0003-1216-5235; Rizzo, Giuliana/0000-0003-1788-2866;
Paoloni, Eugenio/0000-0001-5969-8712; Faccini,
Riccardo/0000-0003-2613-5141
FU BABAR; SLAC; 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 28
TC 8
Z9 8
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 NOV
PY 2008
VL 78
IS 9
AR 091102
DI 10.1103/PhysRevD.78.091102
PG 9
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 376WO
UT WOS:000261213900002
ER
PT J
AU Bern, Z
Carrasco, JJM
Dixon, LJ
Johansson, H
Roiban, R
AF Bern, Z.
Carrasco, J. J. M.
Dixon, L. J.
Johansson, H.
Roiban, R.
TI Manifest ultraviolet behavior for the three-loop four-point amplitude of
N=8 supergravity
SO PHYSICAL REVIEW D
LA English
DT Review
ID SUDAKOV FORM-FACTOR; ABELIAN GAUGE-THEORIES; ONE-LOOP DIVERGENCES;
SUPER-YANG-MILLS; GRAVITON SCATTERING-AMPLITUDES; ASYMPTOTIC-BEHAVIOR;
TREE AMPLITUDES; QUANTUM-GRAVITY; CROSS-SECTIONS; STRING THEORY
AB Using the method of maximal cuts, we obtain a form of the three-loop four-point scattering amplitude of N=8 supergravity in which all ultraviolet cancellations are made manifest. The Feynman loop integrals that appear have a graphical representation with only cubic vertices, and numerator factors that are quadratic in the loop momenta, rather than quartic as in the previous form. This quadratic behavior reflects cancellations beyond those required for finiteness, and matches the quadratic behavior of the three-loop four-point scattering amplitude in N=4 super-Yang-Mills theory. By direct integration we confirm that no additional cancellations remain in the N=8 supergravity amplitude, thus demonstrating that the critical dimension in which the first ultraviolet divergence occurs at three loops is D-c=6. We also give the values of the three-loop divergences in D=7, 9, 11. In addition, we present the explicitly color-dressed three-loop four-point amplitude of N=4 super-Yang-Mills theory.
C1 [Bern, Z.; Carrasco, J. J. M.; Johansson, H.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
[Dixon, L. J.] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
[Roiban, R.] Penn State Univ, Dept Phys, University Pk, PA 16802 USA.
RP Bern, Z (reprint author), Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
OI Carrasco, John Joseph/0000-0002-4499-8488
FU US Department of Energy [DE-FG03-91ER40662, DE-AC02-76SF00515,
DE-FG02-90ER40577]; US National Science Foundation [PHY-0455649,
PHY-0608114]; A. P. Sloan Foundation; Guy Weyl Physics; Astronomy Alumni
FX We thank David Kosower for many helpful discussions and collaboration on
this topic. We also thank Paul Howe, Harald Ita, Renata Kallosh, Kelly
Stelle, and Pierre Vanhove for valuable discussions. We thank Academic
Technology Services at UCLA for computer support. This research was
supported by the US Department of Energy under Contracts No.
DE-FG03-91ER40662 (Z. B., J. J. M. C., H. J.), No. DE-AC02-76SF00515 (
L. J. D.), No. DE-FG02-90ER40577 (OJI) ( R. R.), the US National Science
Foundation under Grants No. PHY-0455649 and No. PHY-0608114, and the A.
P. Sloan Foundation ( R. R.). J. J. M. C. and H. J. gratefully
acknowledge the financial support of Guy Weyl Physics and Astronomy
Alumni Grants.
NR 158
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
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J9 PHYS REV D
JI Phys. Rev. D
PD NOV
PY 2008
VL 78
IS 10
AR 105019
DI 10.1103/PhysRevD.78.105019
PG 18
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 376WQ
UT WOS:000261214100093
ER
PT J
AU Chen, MC
Dawson, S
Jackson, CB
AF Chen, Mu-Chun
Dawson, Sally
Jackson, C. B.
TI Higgs triplets, decoupling, and precision measurements
SO PHYSICAL REVIEW D
LA English
DT Article
ID RADIATIVE-CORRECTIONS; MODELS; SYMMETRY; PHYSICS; MASS
AB Electroweak precision data has been extensively used to constrain models containing physics beyond that of the standard model. When the model contains Higgs scalars in representations other than SU(2) singlets or doublets, and hence rho not equal 1 at tree level, a correct renormalization scheme requires more inputs than the three needed for the standard model. We discuss the connection between the renormalization of models with Higgs triplets and the decoupling properties of the models as the mass scale for the scalar triplet field becomes much larger than the electroweak scale. The requirements of perturbativity of the couplings and agreement with electroweak data place strong restrictions on models with Higgs triplets. Our results have important implications for Little Higgs type models and other models with rho not equal 1 at tree level.
C1 [Chen, Mu-Chun] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
[Dawson, Sally] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
[Jackson, C. B.] Argonne Natl Lab, HEP Div, Argonne, IL 60439 USA.
RP Chen, MC (reprint author), Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
EM muchunc@uci.edu; dawson@bnl.gov; jackson@hep.anl.gov
OI Dawson, Sally/0000-0002-5598-695X; Chen, Mu-Chun/0000-0002-5749-2566
FU U.S. Department of Energy [DE-AC02-98CH10886, (DE-AC02-06CH11357)];
National Science Foundation [PHY-0709742]
FX The work of S. D. (C.J.) is supported by the U.S. Department of Energy
under Grant No. DE-AC02-98CH10886 (DE-AC02-06CH11357). The work of
M.C.C. is supported, in part, by the National Science Foundation under
Grant No. PHY-0709742. S.D. thanks the SLAC theory group for their
hospitality, where this work was begun.
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J9 PHYS REV D
JI Phys. Rev. D
PD NOV
PY 2008
VL 78
IS 9
AR 093001
DI 10.1103/PhysRevD.78.093001
PG 12
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 376WO
UT WOS:000261213900014
ER
PT J
AU Choi, SY
Drees, M
Freitas, A
Zerwas, PM
AF Choi, S. Y.
Drees, M.
Freitas, A.
Zerwas, P. M.
TI Testing the Majorana nature of gluinos and neutralinos
SO PHYSICAL REVIEW D
LA English
DT Article
ID SUPERSYMMETRIC PARTICLES; LINEAR COLLIDERS; HADRON COLLIDERS; STANDARD
MODEL; PHYSICS; DECAYS; LHC; E(+)E(-); BREAKING; SEARCH
AB Gluinos and neutralinos, supersymmetric partners of gluons and neutral electroweak gauge and Higgs bosons, are Majorana particles in the minimal supersymmetric standard model (MSSM). Decays of such self-conjugate particles generate charge symmetric ensembles of final states. Moreover, production channels of supersymmetric particles at colliders are characteristically affected by the Majorana nature of particles exchanged in the production processes. The sensitivity to the Majorana character of the particles can be quantified by comparing the predictions with Dirac exchange mechanisms. A consistent framework for introducing gluino and neutralino Dirac fields can be designed by extending the N = 1 supersymmetry of the MSSM to N = 2 in the gauge sector. We examine to which extent like-sign dilepton production in the processes qq -> (q) over tilde(q) over tilde and e(-)e(-) -> (e) over tilde (-)(e) over tilde (-) is affected by the exchange of either Majorana or Dirac gluinos and neutralinos, respectively, at the Large Hadron Collider (LHC) and in the prospective e(-)e(-) mode of a lepton linear collider.
C1 [Choi, S. Y.] Chonbuk Natl Univ, Dept Phys, Jeonju 561756, South Korea.
[Choi, S. Y.] Chonbuk Natl Univ, RIPC, Jeonju 561756, South Korea.
[Drees, M.] Univ Bonn, Inst Phys, D-53115 Bonn, Germany.
[Drees, M.] KIAS, Sch Phys, Seoul 130012, South Korea.
[Drees, M.] Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany.
[Freitas, A.] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA.
[Freitas, A.] Argonne Natl Lab, HEP Div, Argonne, IL 60439 USA.
[Zerwas, P. M.] DESY, D-22603 Hamburg, Germany.
[Zerwas, P. M.] RWTH Aachen U, Inst Theor, D-52074 Aachen, Germany.
RP Choi, SY (reprint author), Chonbuk Natl Univ, Dept Phys, Jeonju 561756, South Korea.
FU Korean Government (MOERHRD, Basic Research Promotion Fund)
[KRF-2007-521-C00065]; Bundesministerium fur Bildung und Forschung
[05HT6PDA]; Marie Curie Training Research Networks "UniverseNet"
[MRTN-CT-2006-035863]; "ForcesUniverse" [MRTN-CT-2004-005104]; The Quest
for Unification [MRTNCT-2004-503369]; U.S. DOE, Division of HEP
[DE-AC-0206CH11357]
FX We are grateful to A. M. Cooper-Sarkar, A. Glazov, T. Hebbeker, and S.
Lammel for communications on vari- ous experimental aspects of this
study, and to J. Kalinowski for the critical reading of the manuscript.
Special thanks go to M. M. Miihlleitner and P. Skands for clarifying
issues on the branching ratios of gluino decays. The work by S. Y. C.
was supported in part by the Korea Research Foundation Grant funded by
the Korean Government (MOERHRD, Basic Research Promotion Fund) under
Contract No. (KRF-2007-521-C00065 and in part by KOSEF through CHEP at
Kyungpook National University. The work of M. D. was partially supported
by Bundesministerium fur Bildung und Forschung under Contract No.
05HT6PDA, and partially by the Marie Curie Training Research Networks
"UniverseNet" under Contract No. MRTN-CT-2006-035863, "ForcesUniverse"
under Contract No. MRTN-CT-2004-005104, as well as "The Quest for
Unification" under Contract No. MRTNCT-2004-503369. Work at ANL is
supported in part by the U.S. DOE, Division of HEP, Contract No.
DE-AC-0206CH11357. P.M.Z. is grateful to the Institute for Theoretical
Physics E for the warm hospitality extended to him at RWTH Aachen.
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JI Phys. Rev. D
PD NOV
PY 2008
VL 78
IS 9
AR 095007
DI 10.1103/PhysRevD.78.095007
PG 22
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 376WO
UT WOS:000261213900057
ER
PT J
AU Dudek, JJ
Rrapaj, E
AF Dudek, Jozef J.
Rrapaj, Ermal
CA Hadron Spectrum Collaboration
TI Charmonium in lattice QCD and the nonrelativistic quark model
SO PHYSICAL REVIEW D
LA English
DT Article
AB We compare the results of a numerical lattice QCD calculation of the charmonium spectrum with the structure of a general nonrelativistic potential model. To achieve this we form the nonrelativistic reduction of derivative-based fermion bilinear interpolating fields used in lattice QCD calculations and compute their overlap with c (c) over bar meson states at rest constructed in the nonrelativistic quark model, providing a bound-state model interpretation for the lattice data. Essential gluonic components in the bound states, usually called hybrids, are identified by considering interpolating fields that involve the gluonic field-strength tensor and which have zero overlap onto simple c (c) over bar model states.
C1 [Dudek, Jozef J.] Jefferson Lab MS 12H2, Newport News, VA 23606 USA.
[Dudek, Jozef J.; Rrapaj, Ermal] Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
RP Dudek, JJ (reprint author), Jefferson Lab MS 12H2, 12000 Jefferson Ave, Newport News, VA 23606 USA.
EM dudek@jlab.org
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SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD NOV
PY 2008
VL 78
IS 9
AR 094504
DI 10.1103/PhysRevD.78.094504
PG 10
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 376WO
UT WOS:000261213900048
ER
PT J
AU Fang, WJ
Wang, S
Hu, W
Haiman, Z
Hui, L
May, M
AF Fang, Wenjuan
Wang, Sheng
Hu, Wayne
Haiman, Zoltan
Hui, Lam
May, Morgan
TI Challenges to the DGP model from horizon-scale growth and geometry
SO PHYSICAL REVIEW D
LA English
DT Article
ID LUMINOUS RED GALAXIES; GRAVITY; BRANE; COSMOLOGY; SPACE; POWER
AB We conduct a Markov Chain Monte Carlo study of the Dvali-Gabadadze-Porrati self-accelerating braneworld scenario given the cosmic microwave background (CMB) anisotropy, supernovae and Hubble constant data by implementing an effective dark energy prescription for modified gravity into a standard Einstein-Boltzmann code. We find no way to alleviate the tension between distance measures and horizon-scale growth in this model. Growth alterations due to perturbations propagating into the bulk appear as excess CMB anisotropy at the lowest multipoles. In a flat cosmology, the maximum likelihood Dvali-Gabadadze-Porrati model is nominally a 5.3 sigma poorer fit than Lambda CDM. Curvature can reduce the tension between distance measures but only at the expense of exacerbating the problem with growth leading to a 4.8 sigma result that is dominated by the low multipole CMB temperature spectrum. While changing the initial conditions to reduce large-scale power can flatten the temperature spectrum, this also suppresses the large angle polarization spectrum in violation of recent results from the five-year Wilkinson Microwave Anisotropy Probe. The failure of this model highlights the power of combining growth and distance measures in cosmology as a test of gravity on the largest scales.
C1 [Fang, Wenjuan; Hui, Lam] Columbia Univ, Dept Phys, New York, NY 10027 USA.
[Wang, Sheng; Hu, Wayne] Univ Chicago, Kavli Inst Cosmol Phys, Enrico Fermi Inst, Chicago, IL 60637 USA.
[Hu, Wayne] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
[Haiman, Zoltan] Columbia Univ, Dept Astron, New York, NY 10027 USA.
[May, Morgan] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Fang, WJ (reprint author), Columbia Univ, Dept Phys, 538 W 120th St, New York, NY 10027 USA.
NR 47
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SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD NOV
PY 2008
VL 78
IS 10
AR 103509
DI 10.1103/PhysRevD.78.103509
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 376WQ
UT WOS:000261214100027
ER
PT J
AU Gershtein, Y
Petriello, F
Quackenbush, S
Zurek, KM
AF Gershtein, Yuri
Petriello, Frank
Quackenbush, Seth
Zurek, Kathryn M.
TI Discovering hidden sectors with monophoton Z ' searches
SO PHYSICAL REVIEW D
LA English
DT Article
ID DIMENSIONS; HIGGS
AB In many theories of physics beyond the standard model, from extra dimensions to Hidden Valleys and models of dark matter, Z' bosons mediate between standard model particles and hidden sector states. We study the feasibility of observing such hidden states through an invisibly decaying Z' at the LHC. We focus on the process pp -> gamma Z' -> gamma XX dagger, where X is any neutral, (quasi-) stable particle, whether a standard model neutrino or a new state. This complements a previous study using pp -> ZZ' -> l+l-XX dagger. Only the Z' mass and two effective charges are needed to describe this process. If the Z' decays invisibly only to standard model neutrinos, then these charges are predicted by observation of the Z' through the Drell-Yan process, allowing discrimination between Z' decays to standard model P's and invisible decays to new states. We carefully discuss all backgrounds and systematic errors that affect this search. We find that hidden sector decays of a I TeV Z' can be observed at 5 sigma significance with 50 fb(-1) at the LHC. Observation of a 1.5 TeV state requires super-LHC statistics of I ab(-1). Control of the systematic errors, in particular, the parton distribution function uncertainty of the dominant Z gamma background, is crucial to maximize the LHC search reach.
C1 [Gershtein, Yuri] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
[Petriello, Frank; Quackenbush, Seth; Zurek, Kathryn M.] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
[Zurek, Kathryn M.] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
RP Gershtein, Y (reprint author), Rutgers State Univ, Dept Phys & Astron, POB 849, Piscataway, NJ 08854 USA.
FU DOE [DE-FG0295ER40896, DE-FG02-97ER41022]; Wisconsin Alumni Research
Foundation; Alfred P. Sloan Foundation
FX The authors are supported by the DOE grants DE-FG0295ER40896 and
DE-FG02-97ER41022 and by the University of Wisconsin Research Committee
with funds provided by the Wisconsin Alumni Research Foundation, and by
the Alfred P. Sloan Foundation.
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SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD NOV
PY 2008
VL 78
IS 9
AR 095002
DI 10.1103/PhysRevD.78.095002
PG 6
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 376WO
UT WOS:000261213900052
ER
PT J
AU Hubner, K
Karsch, F
Pica, C
AF Huebner, K.
Karsch, F.
Pica, C.
TI Correlation functions of the energy-momentum tensor in SU(2) gauge
theory at finite temperature
SO PHYSICAL REVIEW D
LA English
DT Article
ID QUARK-GLUON PLASMA; TRANSPORT-COEFFICIENTS; CRITICAL-POINT; BULK
VISCOSITY; LATTICE; RENORMALIZATION; THERMODYNAMICS; COLLABORATION;
PERSPECTIVE; COLLISIONS
AB We calculate correlation functions of the energy-momentum tensor in the vicinity of the deconfinement phase transition of (3 + 1)-dimensional SU(2) gauge theory and discuss their critical behavior in the vicinity of the second order deconfinement transition. We show that correlation functions of the trace of the energy-momentum tensor diverge uniformly at the critical point in proportion to the specific heat singularity. Correlation functions of the pressure, on the other hand, stay finite at the critical point. We discuss the consequences of these findings for the analysis of transport coefficients, in particular, the bulk viscosity, in the vicinity of a second order phase transition point.
C1 [Huebner, K.; Karsch, F.; Pica, C.] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
[Karsch, F.] Univ Bielefeld, Fac Phys, D-33615 Bielefeld, Germany.
RP Hubner, K (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
OI Pica, Claudio/0000-0002-0569-0376
FU U.S. Department of Energy [DE-AC02-98CH10886]
FX We thank Harvey Meyer, Dimitri Kharzeev, and Kirill Tuchin for helpful
discussions. This work has been supported by Contract No.
DE-AC02-98CH10886 with the U.S. Department of Energy. Numerical
simulations have been performed on the BlueGene/L at the New York Center
for Computational Science (NYCCS).
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J9 PHYS REV D
JI Phys. Rev. D
PD NOV
PY 2008
VL 78
IS 9
AR 094501
DI 10.1103/PhysRevD.78.094501
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 376WO
UT WOS:000261213900045
ER
PT J
AU Kachru, S
Liu, X
Mulligan, M
AF Kachru, Shamit
Liu, Xiao
Mulligan, Michael
TI Gravity duals of Lifshitz-like fixed points
SO PHYSICAL REVIEW D
LA English
DT Article
ID PHASE-TRANSITIONS; INSTABILITY; METALS; ORDER; MODEL
AB We find candidate macroscopic gravity duals for scale-invariant but non-Lorentz invariant fixed points, which do not have particle number as a conserved quantity. We compute two-point correlation functions which exhibit novel behavior relative to their AdS counterparts, and find holographic renormalization group flows to conformal field theories. Our theories are characterized by a dynamical critical exponent z, which governs the anisotropy between spatial and temporal scaling t ->lambda(z)t, x ->lambda x; we focus on the case with z=2. Such theories describe multicritical points in certain magnetic materials and liquid crystals, and have been shown to arise at quantum critical points in toy models of the cuprate superconductors. This work can be considered a small step towards making useful dual descriptions of such critical points.
C1 [Kachru, Shamit; Mulligan, Michael] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
[Kachru, Shamit; Mulligan, Michael] Stanford Univ, SLAC, Stanford, CA 94305 USA.
[Liu, Xiao] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada.
RP Kachru, S (reprint author), Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
FU Stanford Institute for Theoretical Physics; NSF [PHY-0244728]; DOE
[DE-AC03-76SF00515]; ARCS; government of Canada; province of Ontario
FX We are happy to thank A. Adams, O. Aharony, J. Cardy, S. Dubovsky, E.
Fradkin, P. Horava, J. Maldacena, J. McGreevy, G. Moore, C. Nayak, S.
Sachdev, S. Shenker, and E. Silverstein for stimulating discussions. We
thank S. Hartnoll and G. Horowitz for comments on the singularity
structure of the spacetime discussed in this paper. We especially
appreciate J. Maldacena's absolutely valuable comment about the
calculation of correlators in this spacetime. We are also grateful to M.
Amin for help with numerical methods. M. M. thanks C.-Y. Hou, C.
Laumann, S. Parameswaran, and A. Rahmani for computer assistance after
catastrophic HD failure. S. K. would like to acknowledge the kind
hospitality of the Kavli Institute for Theoretical Physics, the Aspen
Center for Physics, and the Institute for Advanced Study at various
points during this work. X. L. would like to acknowledge the kind
hospitality of the SITP during the major phase of this collaboration. M.
M. thanks the Les Houches School of Physics for hospitality during the
completion of this work. This research was supported in part by the
Stanford Institute for Theoretical Physics, the NSF under Grant No.
PHY-0244728, and the DOE under Contract No. DE-AC03-76SF00515. M. M. was
also supported by an ARCS Fellowship. Research at the Perimeter
Institute for Theoretical Physics is supported in part by the government
of Canada and through NSERC and by the province of Ontario through MRI.
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JI Phys. Rev. D
PD NOV
PY 2008
VL 78
IS 10
AR 106005
DI 10.1103/PhysRevD.78.106005
PG 8
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 376WQ
UT WOS:000261214100101
ER
PT J
AU Kile, J
Soni, A
AF Kile, Jennifer
Soni, Amarjit
TI Model-independent constraints on lepton-flavor-violating decays of the
top quark
SO PHYSICAL REVIEW D
LA English
DT Article
ID CONSERVATION
AB The imminent start of the Large Hadron Collider, which is expected to produce similar to 10(8) t (t) over bar pairs per year, provides an unprecedented opportunity for top physics. As the top quark is widely expected to be rather sensitive to effects of new physics, a detailed study of its properties, including rare decays, is called for. A possible, experimentally distinctive decay is the case where a top decays to a light quark and a flavor-violating lepton-antilepton pair. We use an effective operator analysis to place model-independent bounds on contributions to the decays t -> ue(+/-) mu(-/+) and t -> ce(+/-) mu(-/+). We enumerate the dimension-six operators which contribute to these decays and which are invariant under the standard model gauge group. We separate these operators into two classes, one with operators where the top quark belongs to an SU(2) doublet and thus can contribute at tree level to low-energy processes, and one class with operators where the top quark is a right-handed singlet and can only contribute to low-energy processes via loop diagrams. We use B and K decays to place limits on the coefficients of some of these operators, but find that several remain unconstrained and could potentially make observable contributions to top decay.
C1 [Kile, Jennifer; Soni, Amarjit] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Kile, J (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM jenkile@quark.phy.bnl.gov; soni@bnl.gov
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JI Phys. Rev. D
PD NOV
PY 2008
VL 78
IS 9
AR 094008
DI 10.1103/PhysRevD.78.094008
PG 9
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 376WO
UT WOS:000261213900030
ER
PT J
AU Nomura, Y
Stolarski, D
AF Nomura, Yasunori
Stolarski, Daniel
TI Naturally flavorful supersymmetry at the LHC
SO PHYSICAL REVIEW D
LA English
DT Review
ID ELECTRIC-DIPOLE MOMENT; ABELIAN HORIZONTAL SYMMETRIES; SU(3) FAMILY
SYMMETRY; MASS MATRIX MODELS; CP VIOLATION; QUARK MASSES; SUPERGRAVITY
THEORIES; LOCAL SUPERSYMMETRY; GRAND UNIFICATION; PARTICLE PHYSICS
AB The suppression of flavor and CP violation in supersymmetric theories may be due to the mechanism responsible for the structure of the Yukawa couplings. We study model independently the compatibility between low-energy flavor and CP constraints and observability of superparticles at the LHC, assuming a generic correlation between the Yukawa couplings and the supersymmetry breaking parameters. We find that the superpotential operators that generate scalar trilinear interactions are generically problematic. We discuss several ways in which this tension is naturally avoided. In particular, we focus on several frameworks in which the dangerous operators are naturally absent. These frameworks can be combined with many theories of flavor, including those with (flat or warped) extra dimensions, strong dynamics, or flavor symmetries. We show that the resulting theories can avoid all the low-energy constraints while keeping the superparticles light. The intergenerational mass splittings among the sfermions can reflect the structure of the underlying flavor theory, and can be large enough to be measurable at the LHC. Detailed observations of the superparticle spectrum may thus provide new handles on the origin of the flavor structure of the standard model.
C1 [Nomura, Yasunori] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA.
RP Nomura, Y (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
OI Stolarski, Daniel/0000-0002-1783-8163; Nomura,
Yasunori/0000-0002-1497-1479
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SN 2470-0010
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J9 PHYS REV D
JI Phys. Rev. D
PD NOV
PY 2008
VL 78
IS 9
AR 095011
DI 10.1103/PhysRevD.78.095011
PG 21
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 376WO
UT WOS:000261213900061
ER
PT J
AU Shu, J
AF Shu, Jing
TI Unitarity bounds for new physics from axial coupling at CERN LHC
SO PHYSICAL REVIEW D
LA English
DT Article
ID FERMION MASS GENERATION; YANG-MILLS THEORY; HIGGS-BOSON MASS; WEAK
INTERACTIONS; HIGH-ENERGIES; CONDENSATION; SYMMETRY
AB If a new massive vector boson with nonzero axial couplings to fermions will be observed at LHC, then an upper limit on the scale of new physics could be derived from unitarity of S matrix. The new physics will involve either new massive fermions, or scalars, or even a strongly coupled sector. We derive a model independent bound on the scale of new physics. If M-G/g(A) < 3 TeV and the fermion is a top quark, the upper limit is 78 TeV.
C1 [Shu, Jing] Univ Chicago, Kavli Inst Cosmol Phys, Enrico Fermi Inst, Chicago, IL 60637 USA.
[Shu, Jing] Univ Chicago, Kavli Inst Cosmol Phys, Dept Phys, Chicago, IL 60637 USA.
[Shu, Jing] Argonne Natl Lab, HEP Div, Argonne, IL 60439 USA.
RP Shu, J (reprint author), Univ Chicago, Kavli Inst Cosmol Phys, Enrico Fermi Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA.
EM jshu@theory.uchicago.edu
OI Shu, Jing/0000-0001-6569-403X
FU U.S. Department of Energy [DE-FG0290ER40560, DE-AC02-06CHI 1357]
FX I would like to thank Tim Tait and Carlos Wagner for valuable
discussions and a careful reading of the manuscript. I especially wish
to thank Bogdan Dobrescu for many useful discussions and directing me to
Ref. [14]. 1 also thank Jay Hubisz, Tao Liu, Ian Low, Joseph Lykken,
Rakhi Mahbubani, Arun Thalapillil, and Chris Quigg for helpful
discussions. This work was supported in part by the U.S. Department of
Energy through Grant No. DE-FG0290ER40560 and DE-AC02-06CHI 1357.
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EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD NOV
PY 2008
VL 78
IS 9
AR 096004
DI 10.1103/PhysRevD.78.096004
PG 7
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 376WO
UT WOS:000261213900066
ER
PT J
AU Silverstein, E
Westphal, A
AF Silverstein, Eva
Westphal, Alexander
TI Monodromy in the CMB: Gravity waves and string inflation
SO PHYSICAL REVIEW D
LA English
DT Article
ID PROBE WMAP OBSERVATIONS; FLUX COMPACTIFICATIONS; BRANE INFLATION;
POLARIZATION; ANISOTROPY; COSMOLOGY; FLATNESS; UNIVERSE; HORIZON; MODELS
AB We present a simple mechanism for obtaining large-field inflation, and hence a gravitational wave signature, from string theory compactified on twisted tori. For nil manifolds, we obtain a leading inflationary potential proportional to phi(2/3) in terms of the canonically normalized field phi, yielding predictions for the tilt of the power spectrum and the tensor-to-scalar ratio, n(s)approximate to 0.98 and r approximate to 0.04 with 60 e-foldings of inflation; we note also the possibility of a variant with a candidate inflaton potential proportional to phi(2/5). The basic mechanism involved in extending the field range-monodromy in D-branes as they move in circles on the manifold-arises in a more general class of compactifications, though our methods for controlling the corrections to the slow-roll parameters require additional symmetries.
C1 [Silverstein, Eva] Stanford Univ, SLAC, Stanford, CA 94305 USA.
Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
RP Silverstein, E (reprint author), Stanford Univ, SLAC, Stanford, CA 94305 USA.
OI Westphal, Alexander/0000-0003-1578-6539
FU NSF [PHY-0244728]; DOE [DE-AC03-76SF00515]; BSF; FQXi;
Alexander-von-Humboldt foundation
FX We thank T. Banks, J. R. Bond, G. Efstathiou, S. Kachru, R. Kallosh,
C.-L. Kuo, A. Lawrence, A. Linde, J. Maldacena, L. McAllister, B.
Netterfield, L. Senatore, and D. Tong for useful discussions. The
research of E. S. is supported by NSF Grant No. PHY-0244728, by the DOE
under Contract No. DE-AC03-76SF00515, and by BSF and FQXi grants. The
research of A. W. is supported in part by the Alexander-von-Humboldt
foundation, as well as by NSF Grant No. PHY-0244728.
NR 95
TC 387
Z9 387
U1 0
U2 6
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 NOV
PY 2008
VL 78
IS 10
AR 106003
DI 10.1103/PhysRevD.78.106003
PG 21
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 376WQ
UT WOS:000261214100099
ER
PT J
AU Mayo, JR
Kerstein, AR
AF Mayo, Jackson R.
Kerstein, Alan R.
TI Fronts in randomly advected and heterogeneous media and nonuniversality
of Burgers turbulence: Theory and numerics
SO PHYSICAL REVIEW E
LA English
DT Article
ID DIRECTED POLYMERS; GROWING INTERFACES; SPIN-GLASSES; PROPAGATION;
VELOCITY
AB A recently established mathematical equivalence-between weakly perturbed Huygens fronts (e.g., flames in weak turbulence or geometrical-optics wave fronts in slightly nonuniform media) and the inviscid limit of white-noise-driven Burgers turbulence-motivates theoretical and numerical estimates of Burgers-turbulence properties for specific types of white-in-time forcing. Existing mathematical relations between Burgers turbulence and the statistical mechanics of directed polymers, allowing use of the replica method, are exploited to obtain systematic upper bounds on the Burgers energy density, corresponding to the ground-state binding energy of the directed polymer and the speedup of the Huygens front. The results are complementary to previous studies of both Burgers turbulence and directed polymers, which have focused on universal scaling properties instead of forcing-dependent parameters. The upper-bound formula can be heuristically understood in terms of renormalization of a different kind from that previously used in combustion models, and also shows that the burning velocity of an idealized turbulent flame does not diverge with increasing Reynolds number at fixed turbulence intensity, a conclusion that applies even to strong turbulence. Numerical simulations of the one-dimensional inviscid Burgers equation using a Lagrangian finite-element method confirm that the theoretical upper bounds are sharp within about 15% for various forcing spectra (corresponding to various two-dimensional random media). These computations provide a quantitative test of the replica method. The inferred nonuniversality (spectrum dependence) of the front speedup is of direct importance for combustion modeling.
C1 [Mayo, Jackson R.; Kerstein, Alan R.] Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA.
RP Mayo, JR (reprint author), Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA.
EM jmayo@sandia.gov; arkerst@sandia.gov
NR 28
TC 2
Z9 2
U1 0
U2 2
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 NOV
PY 2008
VL 78
IS 5
AR 056307
DI 10.1103/PhysRevE.78.056307
PN 2
PG 18
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 376WN
UT WOS:000261213800041
PM 19113216
ER
PT J
AU Danilov, V
AF Danilov, V.
TI Practical solutions for nonlinear accelerator lattice with stable nearly
regular motion
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB The use of nonlinear lattices with the large betatron tune spreads can increase instability and space charge thresholds by orders of magnitude compared to typical linear accelerator lattices. Unfortunately, strong nonlinear fields create, in general, strong resonances and chaotic motion. This shrinks the dynamic aperture to impractical values, thus erasing all benefits from their use. Previously known examples of stable and regular accelerator motion with special nonlinear lenses were related to one-dimensional motion or round beams. However, no solution has been realized with real 2D transverse magnetic fields to produce stable, close to regular 2D motion with the large dynamic aperture and betatron tune spread comparable to the betatron tune itself. This paper presents possible solutions for such 2D lattices. They consist of straight sections with short linear and nonlinear lenses with transverse magnetic fields.
C1 Oak Ridge Natl Lab, Spallat Neutron Source Project, Oak Ridge, TN 37830 USA.
RP Danilov, V (reprint author), Oak Ridge Natl Lab, Spallat Neutron Source Project, Bldg 8600, Oak Ridge, TN 37830 USA.
FU U. S. Department of Energy [AC0500OR22725]
FX The author thanks A. Aleksandrov and J. Holmes for useful comments and
help in manuscript preparation. The research is sponsored by
UT-Battelle, LLC, for the U. S. Department of Energy under Contract No.
DE-AC0500OR22725.
NR 18
TC 3
Z9 3
U1 0
U2 2
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 NOV
PY 2008
VL 11
IS 11
AR 114001
DI 10.1103/PhysRevSTAB.11.114001
PG 7
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 390XL
UT WOS:000262196900003
ER
PT J
AU Novokhatski, A
Heifets, S
AF Novokhatski, A.
Heifets, S.
TI Simple low-frequency beam pickup
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB Detection of the field induced by a beam outside of the beam pipe can be used as a beam diagnostic. Wires placed in longitudinal slots in the outside wall of the beam pipe can be used as a beam pickup. This has a very small beam-coupling impedance and avoids complications of having a feedthrough. The signal can be reasonably high at low frequencies. We present a field waveform at the outer side of a beam pipe, obtained as a result of calculations and measurements. We calculate the beam-coupling impedance due to a long longitudinal slot in the resistive wall and the signal induced in a wire placed in such a slot and shielded by a thin screen from the beam. These results should be relevant for impedance calculations of the slot in an antechamber and for slots in the PEP-II distributed ion pump screens. The design of the low-requency beam position monitor is very simple. It can be used in storage rings, synchrotron light sources, and free electron lasers, like LINAC coherent light source.
C1 [Novokhatski, A.; Heifets, S.] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
RP Novokhatski, A (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
EM novo@slac.stanford.edu
FU Department of Energy [DE-AC0376SF00515, DE-AC0596OR22464.]
FX The work of A. N. and S. H. was supported by Department of Energy
Contract No. DE-AC0376SF00515. The work of A. A. was supported by
Department of Energy Contract No. DE-AC0596OR22464.
NR 5
TC 0
Z9 0
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 NOV
PY 2008
VL 11
IS 11
AR 114401
DI 10.1103/PhysRevSTAB.11.114401
PG 9
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 390XL
UT WOS:000262196900004
ER
PT J
AU Gorelenkov, NN
AF Gorelenkov, N. N.
TI Existence of weakly damped kinetic Alfven eigenmodes in reversed shear
tokamak plasmas
SO PHYSICS OF PLASMAS
LA English
DT Article
DE plasma Alfven waves; plasma instability; plasma kinetic theory; plasma
magnetohydrodynamics; plasma toroidal confinement; Tokamak devices
ID WAVES; EXCITATION
AB A kinetic theory of weakly damped Alfven eigenmode solutions strongly interacting with the continuum is developed for tokamak plasmas with reversed magnetic shear. It is shown that finite Larmor radius (FLR) effects are required for global eigenmode solutions. FLR effects induce multiple kinetic subeigenmodes and collisionless radiative damping. The theory explains the existence of experimentally observed Alfvenic instabilities with frequencies sweeping down and reaching their minimum (bottom).
C1 Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Gorelenkov, NN (reprint author), Princeton Univ, Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM gnorelen@pppl.gov
FU U.S. Department of Energy [DE-AC02-76CH03073]
FX This work was supported by the U.S. Department of Energy under Contract
No. DE-AC02-76CH03073.
NR 21
TC 16
Z9 16
U1 1
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 NOV
PY 2008
VL 15
IS 11
AR 110701
DI 10.1063/1.3027512
PG 4
WC Physics, Fluids & Plasmas
SC Physics
GA 376VZ
UT WOS:000261212400001
ER
PT J
AU Martin-Solis, JR
Sanchez, R
AF Martin-Solis, J. R.
Sanchez, R.
TI Pitch angle scattering and synchrotron radiation of relativistic runaway
electrons in tokamak stochastic magnetic fields
SO PHYSICS OF PLASMAS
LA English
DT Article
DE plasma fluctuations; plasma toroidal confinement; plasma-beam
interactions; synchrotron radiation; Tokamak devices
ID LOWER-HYBRID WAVES; SPACE STRUCTURE; MOMENTUM-SPACE; DYNAMICS;
FLUCTUATIONS; INSTABILITY; TERMINATION; DIFFUSION; TRANSPORT; PLASMAS
AB In a recent work [J. R. Martin-Solis and R. Sanchez, Phys. Plasmas 13, 012508 (2006)], the increase that the presence of stochastic magnetic fields causes on the synchrotron radiation losses of relativistic runaway electrons was quantified using a guiding-center approximation. Here, we complete those studies by considering instead the mechanism which dominates the interaction at the gyromotion level. It is shown that, under typical tokamak conditions, the resonant cyclotron interaction with high enough parallel (to the magnetic field) wave numbers (k(parallel to)) modes can create, even for moderate magnetic fluctuation levels, an upper bound on the runaway energy. Implications for disruption-generated runaway electrons will be also discussed.
C1 [Martin-Solis, J. R.] Univ Carlos III Madrid, Madrid 28911, Spain.
[Sanchez, R.] Oak Ridge Natl Lab, Div Fus Energy, Oak Ridge, TN 37831 USA.
RP Martin-Solis, JR (reprint author), Univ Carlos III Madrid, Ave Univ 30, Madrid 28911, Spain.
EM solis@fis.uc3m.es
FU Direccion General de Investigacion [FTN2003-04587,
ENE2006-15244-C03-01/FTN]; Oak Ridge National Laboratory; U.S.
Department of Energy [DE-AC05-00OR22725]
FX This work was done under financial support from Direccion General de
Investigacion Project Nos. FTN2003-04587 and ENE2006-15244-C03-01/FTN.
Research sponsored in part by Oak Ridge National Laboratory, managed by
UT-Battelle, LLC, for the U.S. Department of Energy under Contract No.
DE-AC05-00OR22725.
NR 23
TC 7
Z9 7
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 NOV
PY 2008
VL 15
IS 11
AR 112505
DI 10.1063/1.3013849
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 376VZ
UT WOS:000261212400022
ER
PT J
AU Mier, JA
Sanchez, R
Garcia, L
Newman, DE
Carreras, BA
AF Mier, J. A.
Sanchez, R.
Garcia, L.
Newman, D. E.
Carreras, B. A.
TI On the nature of transport in near-critical
dissipative-trapped-electron-mode turbulence: Effect of a subdominant
diffusive channel
SO PHYSICS OF PLASMAS
LA English
DT Article
DE plasma confinement; plasma turbulence
ID SELF-ORGANIZED CRITICALITY; FRACTIONAL DYNAMICS APPROACH; DRIFT-WAVE
TURBULENCE; ANOMALOUS TRANSPORT; PLASMA TURBULENCE; RANDOM-WALKS;
PARADIGM; FUSION
AB The change in nature of radial transport in numerical simulations of near-critical dissipative-trapped-electron-mode turbulence is characterized as the relative strength of an additional diffusive transport channel (subdominant to turbulence) is increased from zero. In its absence, radial transport exhibits the lack of spatial and temporal scales characteristic of self-organized-critical systems. This dynamical regime survives up to diffusivity values which, for the system investigated here, greatly exceeds the expected neoclassical value. These results, obtained using a novel Lagrangian method, complete and extend previous works based instead on the use of techniques imported from the study of cellular automata [J. A. Mier , Phys. Plasmas 13, 102308 (2006)]. They also shed further light on why some features of self-organized criticality seem to be observed in magnetically confined plasmas in spite of the presence of mechanisms which apparently violate the conditions needed for its establishment.
C1 [Mier, J. A.; Garcia, L.] Univ Carlos III Madrid, Dept Fis, Madrid 28911, Spain.
[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.
[Carreras, B. A.] BACV Solut Inc, Oak Ridge, TN 37830 USA.
RP Mier, JA (reprint author), Univ Carlos III Madrid, Dept Fis, Madrid 28911, Spain.
EM jmier@fis.uc3m.es
RI Garcia, Luis/A-5344-2015
OI Garcia, Luis/0000-0002-0492-7466
FU DGICYT (Direccion General de Investigaciones Cientificas y Tecnologicas)
of Spain [ENE2006-15244-C03-01/FTN]; U.S. Department of Energy
[DE-AC05-00OR22725]; DOE Office of Science [DE-FG02-04ER5741]
FX The authors express their thanks to Jose Ramon Martin-Solis (Universidad
Carlos III de Madrid, SPAIN) and Boudewijn Ph. van Milligen, Ivan Calvo,
and Guillermo Sanchez-Burillo (CIEMAT, Madrid, SPAIN) for very
stimulating discussions.; This research was sponsored by DGICYT
(Direccion General de Investigaciones Cientificas y Tecnologicas) of
Spain under Project No. ENE2006-15244-C03-01/FTN. Research sponsored in
part by the Laboratory Research and Development Program of Oak Ridge
National Laboratory, managed by UT-Battelle, LLC, for the U.S.
Department of Energy under Contract No. DE-AC05-00OR22725. Research
supported in part by DOE Office of Science Grant No. DE-FG02-04ER5741 at
the University of Alaska.
NR 32
TC 11
Z9 11
U1 1
U2 1
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 NOV
PY 2008
VL 15
IS 11
AR 112301
DI 10.1063/1.3006088
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 376VZ
UT WOS:000261212400008
ER
PT J
AU Yampolsky, NA
Fisch, NJ
Malkin, VM
Valeo, EJ
Lindberg, R
Wurtele, J
Ren, J
Li, S
Morozov, A
Suckewer, S
AF Yampolsky, N. A.
Fisch, N. J.
Malkin, V. M.
Valeo, E. J.
Lindberg, R.
Wurtele, J.
Ren, J.
Li, S.
Morozov, A.
Suckewer, S.
TI Demonstration of detuning and wavebreaking effects on Raman
amplification efficiency in plasma
SO PHYSICS OF PLASMAS
LA English
DT Article
DE optical pulse compression; plasma density; plasma light propagation;
Raman spectra
ID LASER-PULSE AMPLIFICATION; INTENSE PULSES; AMPLIFIERS; BEAMS;
BACKSCATTERING; GENERATION; CHANNELS
AB A plasma-based resonant backward Raman amplifier/compressor for high power amplification of short laser pulses might, under ideal conditions, convert as much as 90% of the pump energy to the seed pulse. While the theoretical highest possible efficiency of this scheme has not yet been achieved, larger efficiencies than ever before obtained experimentally (6.4%) are now being reported, and these efficiencies are accompanied by strong pulse compression. Based on these recent extensive experiments, it is now possible to deduce that the experimentally realized efficiency of the amplifier is likely constrained by two factors, namely the pump chirp and the plasma wavebreaking, and that these experimental observations may likely involve favorable compensation between the chirp of the laser and the density variation of the mediating plasma. Several methods for further improvement of the amplifier efficiency in current experiments are suggested.
C1 [Yampolsky, N. A.; Fisch, N. J.; Malkin, V. M.] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
[Valeo, E. J.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Lindberg, R.; Wurtele, J.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Ren, J.; Li, S.; Morozov, A.; Suckewer, S.] Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08543 USA.
RP Yampolsky, NA (reprint author), Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
RI Yampolsky, Nikolai/A-7521-2011; Li, Shuanglei/A-5376-2012; wurtele,
Jonathan/J-6278-2016
OI wurtele, Jonathan/0000-0001-8401-0297
FU DOE [DE-FG5207NA28122, DE-AC0276CH03073]
FX This work was supported by the NNSA under the SSAA Program through DOE
Research Grant No. DE-FG5207NA28122 and by DOE Contract No.
DE-AC0276CH03073.
NR 40
TC 29
Z9 30
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 NOV
PY 2008
VL 15
IS 11
AR 113104
DI 10.1063/1.3023153
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 376VZ
UT WOS:000261212400034
ER
PT J
AU Sanchez-Valle, C
Sinogeikin, SV
Smyth, JR
Bass, JD
AF Sanchez-Valle, Carmen
Sinogeikin, Stanislav V.
Smyth, Joseph R.
Bass, Jay D.
TI Sound velocities and elasticity of DHMS phase A to high pressure and
implications for seismic velocities and anisotropy in subducted stabs
SO PHYSICS OF THE EARTH AND PLANETARY INTERIORS
LA English
DT Article
DE Phase A; High pressure; Elasticity; Sound velocities; Brillouin
scattering
ID SINGLE-CRYSTAL ELASTICITY; X-RAY-DIFFRACTION; HYDROUS MAGNESIUM
SILICATES; BRILLOUIN-SCATTERING; UPPER-MANTLE; THERMAL-EXPANSION; WATER
TRANSPORT; 12 GPA; STABILITY; TEMPERATURE
AB Dense hydrous magnesium silicate (DHMS) phase A forms in cold subducted slabs after the breakdown of antigorite serpentine. and may play an important role in the transport of water within the upper mantle. In this paper we present acoustic velocities and the single-crystal elastic properties of Fe-bearing phase A, (Mg-0.981 Fe-0.019)(7)Si2O8(OH)(6), measured by Brillouin spectroscopy on a sample compressed to 12.4(2) GPa in a diamond anvil cell. A fit to the acoustic data using a 3rd order finite-strain EOS yields the following adiabatic bulk (K-S) and shear (mu) moduli and their pressure derivatives: K-S=106(1) GPa, (partial derivative K-S/partial derivative P)(T0)=5.8(3), mu=61(1) GPa, (partial derivative mu/partial derivative P)(T0)=1.8(1). Within the experimental resolution, the pure longitudinal elastic constants, C-11 and C-33, and the off-diagonal C-12 constants exhibit positive linear pressure dependence, whereas C-44, C-66 and C-13 increase with a quadratic dependence on pressure. The axial compressibility of phase A remains highly anisotropic in the investigated pressure range, with the a-axis being 15% more compressible than the c-axis at 12.4(2) GPa.
Compared to forsterite, the aggregate compressional (V-P) and shear (V-S) acoustic velocities of phase A are 7% slower at room pressure. Although the velocity contrast diminishes to 3.5% for V-P, it is maintained for V-S over the investigated pressure range. Phase A has high shear wave anisotropy (A(S)) and shear-wave polarization anisotropy (A(S)(P0)) of A(S)=20% and A(S)(P0)=18%, and a more moderate compressional wave anisotropy A(P)=12% at room pressure. The A(P) of phase A decreases to 8% at 12.4(2) GPa, remaining significantly lower than that of forsterite, whereas the shear anisotropy is nearly constant at similar to 20% over the same pressure range and exceeds that of forsterite by 12% at 12.4(2) GPa. At upper mantle pressures, the shear wave splitting in phase A (A(S)(P0)) is 20% higher than in forsterite. The results of this study were used with thermoelastic S data for other relevant minerals to compute the density, seismic velocities and V-P/V-S ratios of subducted garnet-harzbugite and moderately depleted harzburgite assemblages with various degrees of hydration as a function of pressure along a slab isotherm at 1073 K. The results suggest that the seismic velocities of dry and water-saturated harzburgites (44.5vol% phase A) may be indistinguishable at upper mantle P-T conditions because of the increasing concentration of high-pressure orthopyroxene upon hydration. This phase displays high seismic velocities that offset the decrease in velocities due to phase A, rendering hydration difficult to detect (anelastic attenuation is not considered). Combined observations from the analysis of seismic parameters indicate that significant shear wave anisotropy, accompanied by high V-P/V-S and Poisson's ratios and pronounced shear wave splitting, could be major diagnostic features for identifying phase A-bearing assemblages at depth (180-350 km) in cold subducted slabs. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Sanchez-Valle, Carmen] ETH, Inst Mineral & Petrol, CH-8092 Zurich, Switzerland.
[Sanchez-Valle, Carmen; Bass, Jay D.] Univ Illinois, Dept Geol, Urbana, IL 61801 USA.
[Sinogeikin, Stanislav V.] Argonne Natl Lab, Adv Photon Source, Carnegie Inst Washington, HPCAT, Argonne, IL 60439 USA.
[Smyth, Joseph R.] Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA.
RP Sanchez-Valle, C (reprint author), ETH, Inst Mineral & Petrol, CH-8092 Zurich, Switzerland.
EM carmen.sanchez@erdw.ethz.ch
RI Bass, Jay/G-2599-2013; Sanchez-Valle, Carmen/A-2119-2017
OI Sanchez-Valle, Carmen/0000-0001-5046-1612
FU NSF [EAR 0003383, 0135642]
FX We would like to thank J.R Perrillat, R Ulmer and E. Medard for fruitful
discussions at different stages of this work. Shear wave polarization
anisotropies were calculated using the Petrophysical software of D.
Mainprice. Comments by two anonymous reviewers helped to improve this
manuscript. This work was supported by NSF grants EAR 0003383 and
0135642 to JDB.
NR 74
TC 11
Z9 12
U1 2
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0031-9201
EI 1872-7395
J9 PHYS EARTH PLANET IN
JI Phys. Earth Planet. Inter.
PD NOV
PY 2008
VL 170
IS 3-4
BP 229
EP 239
DI 10.1016/j.pepi.2008.07.015
PG 11
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 378LP
UT WOS:000261322600013
ER
PT J
AU Lin, JF
Tsuchiya, T
AF Lin, Jung-Fu
Tsuchiya, Taku
TI Spin transition of iron in the Earth's lower mantle
SO PHYSICS OF THE EARTH AND PLANETARY INTERIORS
LA English
DT Article
DE Spin transition; Lower mantle; Mineral physics; Ferropericlase; Silicate
perovskite
ID POST-PEROVSKITE PHASE; OPTICAL-ABSORPTION SPECTRA; RAY-EMISSION
SPECTROSCOPY; HIGH-PRESSURE; SYNCHROTRON MOSSBAUER;
ELECTRONIC-STRUCTURE; SILICATE PEROVSKITE; MGSIO3 PEROVSKITE;
THERMODYNAMIC PARAMETERS; THERMAL-CONDUCTIVITY
AB Electronic spin-pairing transitions of iron and associated effects on the physical properties of host phases have been reported in lower-mantle minerals including ferropericlase, silicate perovskite, and possibly in post-perovskite at lower-mantle pressures. Here we evaluate current understanding of the spin and valence states of iron in the lower-mantle phases, emphasizing the effects of the spin transitions on the density, sound velocities, chemical behavior, and transport properties of the lower-mantle phases. The spin transition of iron in ferropericlase occurs at approximately 50 GPa and room temperature but turns into a wide spin crossover under lower-mantle temperatures. Current experimental results indicate a continuous nature of the spin crossover in silicate perovskite at high pressures, but Which valence state of iron undergoes the spin crossover and what is its associated crystallographic site remain uncertain. The spin transition of iron results in enhanced density, incompressibility, and sound velocities, and reduced radiative thermal conductivity and electrical conductivity in the low-spin ferropericlase, which should be considered in future geophysical and geodynamic modeling of the Earth's lower mantle. In addition, a reduction in sound velocities within the spin transition is recently reported. Our evaluation of the experimental and theoretical pressure-volume results shows that the spin crossover of iron results in a density increase of 2-4% in ferropericlase containing 17-20% FeO. Here we have modeled the density and bulk modulus profiles of ferropericlase across the spin crossover under lower-mantle pressure-temperature conditions and shown how the ratio of the spin states of iron affects our understanding of the state of the Earth's lower mantle. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Lin, Jung-Fu] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Tsuchiya, Taku] Ehime Univ, Geodynam Res Ctr, Matsuyama, Ehime 7908577, Japan.
RP Lin, JF (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA.
EM afu@llnl.gov
RI Lin, Jung-Fu/B-4917-2011; Tsuchiya, Taku/A-6406-2014
OI Tsuchiya, Taku/0000-0002-6042-3692
FU Ehime University; Japan Society for the Promotion of Science [18840033,
19740331]
FX We thank M.J. Lipps, V. Iota, and A. Lazicki for discussions. We also
thank S. Speziale and W.A. Bassett for constructive comments. This work
at LLNL was performed under the auspices of the U.S. DOE by University
of California and LLNL under Contract No. W-7405-Eng-48. JFL was also
supported by Lawrence Livermore Fellowship. TT is supported by the Ehime
University Project Fund and Grant-in-Aid for Scientific Research from
the Japan Society for the Promotion of Science (nos. 18840033 and
19740331). Part of the study was completed during JFL's visit to GRC,
Ehime University.
NR 91
TC 57
Z9 57
U1 1
U2 25
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0031-9201
EI 1872-7395
J9 PHYS EARTH PLANET IN
JI Phys. Earth Planet. Inter.
PD NOV
PY 2008
VL 170
IS 3-4
BP 248
EP 259
DI 10.1016/j.pepi.2008.01.005
PG 12
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 378LP
UT WOS:000261322600015
ER
PT J
AU Manley, DK
McIlroy, A
Taatjes, CA
AF Manley, Dawn K.
McIlroy, Andrew
Taatjes, Craig A.
TI Research needs for future internal combustion engines
SO PHYSICS TODAY
LA English
DT Article
ID CHEMICAL-KINETICS; SIMULATION; JET
C1 [Manley, Dawn K.] Sandia Natl Labs, Combust Res Facil, Reacting flow Res Dept, Livermore, CA USA.
[McIlroy, Andrew; Taatjes, Craig A.] Sandia Natl Labs, Combust Res Facil, Combust Chem Dept, Livermore, CA USA.
RP Manley, DK (reprint author), Sandia Natl Labs, Combust Res Facil, Reacting flow Res Dept, Livermore, CA USA.
NR 18
TC 21
Z9 21
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 0031-9228
J9 PHYS TODAY
JI Phys. Today
PD NOV
PY 2008
VL 61
IS 11
BP 47
EP 52
DI 10.1063/1.3027991
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 368LC
UT WOS:000260621600024
ER
PT J
AU Crease, RP
AF Crease, Robert P.
TI Critical Point Beauty and the beast
SO PHYSICS WORLD
LA English
DT Editorial Material
C1 SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 USA.
[Crease, Robert P.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Crease, RP (reprint author), SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 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 NOV
PY 2008
VL 21
IS 11
BP 19
EP 19
PG 1
WC Physics, Multidisciplinary
SC Physics
GA 384QA
UT WOS:000261758100024
ER
PT J
AU Tobias, CM
Sarath, G
Twigg, P
Lindquist, E
Pangilinan, J
Penning, BW
Barry, K
McCann, MC
Carpita, NC
Lazo, GR
AF Tobias, Christian M.
Sarath, Gautam
Twigg, Paul
Lindquist, Erika
Pangilinan, Jasmyn
Penning, Bryan W.
Barry, Kerry
McCann, Maureen C.
Carpita, Nicholas C.
Lazo, Gerard R.
TI Comparative Genomics in Switchgrass Using 61,585 High-Quality Expressed
Sequence Tags
SO PLANT GENOME
LA English
DT Article
ID NONSYNONYMOUS SUBSTITUTION RATES; NUCLEAR-DNA CONTENT; CESA GENE FAMILY;
PANICUM-VIRGATUM; ALANINE AMINOTRANSFERASE; O-METHYLTRANSFERASE; RAPD
MARKERS; SSR-MARKERS; PLANT; SYNTHASE
AB The development of genomic resources for switchgrass (Panicum virgatum L.), a perennial NAD(+)-malic enzyme type C-4 grass, is required to enable molecular breeding and biotechnological approaches for improving its value as a forage and bioenergy crop. Expressed sequence tag (EST) sequencing is one method that can quickly sample gene inventories and produce data suitable for marker development or analysis of tissue-specific patterns of expression. Toward this goal, three cDNA libraries from callus, crown, and seedling tissues of 'Kanlow' switchgrass were end-sequenced to generate a total of 61,585 high-quality ESTs from 36,565 separate clones. Seventy-three percent of the assembled consensus sequences could be aligned with the sorghum [Sorghum bicolor (L.) Moench] genome at a E-value of <1 x 10(-20), indicating a high degree of similarity. Sixty-five percent of the ESTs matched with gene ontology molecular terms, and 3.3% of the sequences were matched with genes that play potential roles in cell-wall biogenesis. The representation in the three libraries of gene families known to be associated with C-4 photosynthesis, cellulose and beta-glucan synthesis, phenylpropanoid biosynthesis, and peroxidase activity indicated likely roles for individual family members. Pairwise comparisons of synonymous codon substitutions were used to assess genome sequence diversity and indicated an overall similarity between the two genome copies present in the tetraploid. Identification of EST-simple sequence repeat markers and amplification on two individual parents of a mapping population yielded an average of 2.18 amplicons per individual, and 35% of the markers produced fragment length polymorphisms.
C1 [Tobias, Christian M.; Lazo, Gerard R.] USDA ARS, Western Reg Res Ctr, Genom & Gene Discovery Unit, Albany, CA 94710 USA.
[Sarath, Gautam] Univ Nebraska, USDA ARS, Grain Forage & Bioenergy Res Unit, Lincoln, NE 68583 USA.
[Twigg, Paul] Univ Nebraska, Dep Biol, Kearney, NE 68849 USA.
[Pangilinan, Jasmyn; Barry, Kerry] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Penning, Bryan W.; McCann, Maureen C.] Purdue Univ, Dep Biol Sci, W Lafayette, IN 47907 USA.
[Carpita, Nicholas C.] Purdue Univ, Dep Bot & Plant Pathol, W Lafayette, IN 47907 USA.
RP Tobias, CM (reprint author), USDA ARS, Western Reg Res Ctr, Genom & Gene Discovery Unit, 800 Buchanan St, Albany, CA 94710 USA.
EM christian.tobias@ars.usda.gov
RI Lazo, Gerard/A-8900-2009; Tobias, Christian/B-6602-2009
OI Lazo, Gerard/0000-0002-9160-2052; Tobias, Christian/0000-0002-7881-750X
FU U.S. Department of Energy [776898]; U.S. Department of Agriculture,
Agriculture Research Service CRIS [5325-21000-13, 5440-21000-028]; NIH
from the BRIN Program of the National Center for Research Resources [P20
RR16569]; University of Nebraska at Kearney Research Services Council
University Research & Creative Activity Grant; NSF Plant Genome Research
Grant [DBI-0217552]
FX The authors would like to acknowledge Humphrey Wanjugi and Jennifer
Bragg for critical reading of the manuscript. This work was supported
through the community sequencing program of the U.S. Department of
Energy, project 776898, through the U.S. Department of Agriculture,
Agriculture Research Service CRIS 5325-21000-13 and 5440-21000-028, and
supported in part by NIH Grant P20 RR16569 from the BRIN Program of the
National Center for Research Resources, a University of Nebraska at
Kearney Research Services Council University Research & Creative
Activity Grant, and an NSF Plant Genome Research Grant DBI-0217552 (to
N.C.C., M. C. C.). Mention of trade names or commercial products in this
article is solely for the purpose of providing specific information and
does not imply recommendation or endorsement by the U.S. Department of
Agriculture.
NR 60
TC 44
Z9 45
U1 3
U2 12
PU CROP SCIENCE SOC AMER
PI MADISON
PA 677 S SEGOE ROAD, MADISON, WI 53711 USA
SN 1940-3372
J9 PLANT GENOME-US
JI Plant Genome
PD NOV
PY 2008
VL 1
IS 2
BP 111
EP 124
DI 10.3835/plantgenome2008.08.0003
PG 14
WC Plant Sciences; Genetics & Heredity
SC Plant Sciences; Genetics & Heredity
GA V26WM
UT WOS:000208575700006
ER
PT J
AU Yang, XH
Kalluri, UC
Jawdy, S
Gunter, LE
Yin, TM
Tschaplinski, TJ
Weston, DJ
Ranjan, P
Tuskan, GA
AF Yang, Xiaohan
Kalluri, Udaya C.
Jawdy, Sara
Gunter, Lee E.
Yin, Tongming
Tschaplinski, Timothy J.
Weston, David J.
Ranjan, Priya
Tuskan, Gerald A.
TI The F-Box Gene Family Is Expanded in Herbaceous Annual Plants Relative
to Woody Perennial Plants
SO PLANT PHYSIOLOGY
LA English
DT Article
ID SELF-INCOMPATIBILITY; ARABIDOPSIS-THALIANA; PROTEIN; GENOME; ANNOTATION;
DEGRADATION; DATABASE; IDENTIFICATION; ASSEMBLIES; EVOLUTION
AB F-box proteins are generally responsible for substrate recognition in the Skp1-Cullin-F-box complexes that are involved in protein degradation via the ubiquitin-26S proteasome pathway. In plants, F-box genes influence a variety of biological processes, such as leaf senescence, branching, self-incompatibility, and responses to biotic and abiotic stresses. The number of F-box genes in Populus ( Populus trichocarpa; approximately 320) is less than half that found in Arabidopsis ( Arabidopsis thaliana; approximately 660) or Oryza ( Oryza sativa; approximately 680), even though the total number of genes in Populus is equivalent to that in Oryza and 1.5 times that in Arabidopsis. We performed comparative genomics analysis between the woody perennial plant Populus and the herbaceous annual plants Arabidopsis and Oryza in order to explicate the functional implications of this large gene family. Our analyses reveal interspecific differences in genomic distribution, orthologous relationship, intron evolution, protein domain structure, and gene expression. The set of F-box genes shared by these species appear to be involved in core biological processes essential for plant growth and development; lineage-specific differences primarily occurred because of an expansion of the F-box genes via tandem duplications in Arabidopsis and Oryza. The number of F-box genes in the newly sequenced woody species Vitis ( Vitis vinifera; 156) and Carica ( Carica papaya; 139) is similar to that in Populus, supporting the hypothesis that the F-box gene family is expanded in herbaceous annual plants relative to woody perennial plants. This study provides insights into the relationship between the structure and composition of the F-box gene family in herbaceous and woody species and their associated developmental and physiological features.
C1 [Yang, Xiaohan; Kalluri, Udaya C.; Jawdy, Sara; Gunter, Lee E.; Yin, Tongming; Tschaplinski, Timothy J.; Weston, David J.; Ranjan, Priya; Tuskan, Gerald A.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Tuskan, GA (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA.
EM tuskanga@ornl.gov
RI KALLURI, UDAYA/A-6218-2011; Tuskan, Gerald/A-6225-2011; Weston,
David/A-9116-2011; Gunter, Lee/L-3480-2016; Yang, Xiaohan/A-6975-2011;
OI Tuskan, Gerald/0000-0003-0106-1289; Weston, David/0000-0002-4794-9913;
Gunter, Lee/0000-0003-1211-7532; Yang, Xiaohan/0000-0001-5207-4210;
Tschaplinski, Timothy/0000-0002-9540-6622; KALLURI,
UDAYA/0000-0002-5963-8370
FU U. S. Department of Energy [DE-AC05-00OR22725]; Office of Science,
Biological, and Environmental Research Carbon Sequestration Program
FX This work was supported by the U. S. Department of Energy, Office of
Science, Biological, and Environmental Research Carbon Sequestration
Program. Oak Ridge National Laboratory is managed by UT-Battelle, LLC,
for the U. S. Department of Energy under Contract Number
DE-AC05-00OR22725.
NR 46
TC 61
Z9 62
U1 3
U2 25
PU AMER SOC PLANT BIOLOGISTS
PI ROCKVILLE
PA 15501 MONONA DRIVE, ROCKVILLE, MD 20855 USA
SN 0032-0889
J9 PLANT PHYSIOL
JI Plant Physiol.
PD NOV
PY 2008
VL 148
IS 3
BP 1189
EP 1200
DI 10.1104/pp.108.121921
PG 12
WC Plant Sciences
SC Plant Sciences
GA 369UN
UT WOS:000260719500002
PM 18775973
ER
PT J
AU Catto, PJ
Simakov, AN
Parra, FI
Kagan, G
AF Catto, Peter J.
Simakov, Andrei N.
Parra, Felix I.
Kagan, Grigory
TI Electrostatic turbulence in tokamaks on transport time scales
SO PLASMA PHYSICS AND CONTROLLED FUSION
LA English
DT Article
ID HYDROMAGNETIC EQUATIONS; GYROKINETIC EQUATIONS; MOMENTUM TRANSPORT;
ION-TRANSPORT; PLASMA; SYSTEMS; DRIVEN
AB Simulating electrostatic turbulence in tokamaks on transport time scales requires retaining and evolving a complete turbulence modified neoclassical transport description, including all the axisymmetric neoclassical and zonal flow radial electric field effects, as well as the turbulent transport normally associated with drift instabilities. Neoclassical electric field effects are particularly difficult to retain since they require evaluating the ion distribution function to higher order in gyroradius over background scale length than standard gyrokinetic treatments. To avoid extending gyrokinetics an alternate hybrid gyrokinetic-fluid treatment is formulated that employs moments of the full Fokker-Planck kinetic equation to remove the need for a higher order gyrokinetic distribution function. The resulting hybrid description is able to model all electrostatic turbulence effects withwavelengths much longer than an electron Larmor radius such as the ion temperature gradient (ITG) and trapped electron modes (TEM).
C1 [Catto, Peter J.; Parra, Felix I.; Kagan, Grigory] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA.
[Simakov, Andrei N.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Catto, PJ (reprint author), MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA.
EM catto@psfc.mit.edu
RI Parra, Felix I./C-1442-2012;
OI Parra, Felix I./0000-0001-9621-7404; Simakov, Andrei/0000-0001-7064-9153
NR 39
TC 8
Z9 8
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 NOV
PY 2008
VL 50
IS 11
AR 115006
DI 10.1088/0741-3335/50/11/115006
PG 21
WC Physics, Fluids & Plasmas
SC Physics
GA 364BR
UT WOS:000260311700006
ER
PT J
AU Shevelko, A
Bliss, D
Kazakov, E
Mazarakis, M
McGurn, J
Knight, L
Struve, K
Tolstikhina, I
Weeks, T
AF Shevelko, A. P.
Bliss, D. E.
Kazakov, E. D.
Mazarakis, M. G.
McGurn, J. S.
Knight, L. V.
Struve, K. W.
Tolstikhina, I. Yu.
Weeks, T. J.
TI EUV spectroscopy of plasmas created in the final anode-cathode gap of
the Z-Machine high-current pulsed generator (SNL)
SO PLASMA PHYSICS REPORTS
LA English
DT Article
DE 52; 58; Lq; 52; 70; La
ID LASER-PRODUCED PLASMAS; X-RAY SPECTROSCOPY; RADIATION; LINES
AB The effect of short-circuit across the final anode-cathode gap of powerful pulsed current generators could hamper efficient power delivery to the Z-pinch plasma. To study this effect, a novel EUV diagnostics of plasmas created in the final section of the transmission line (the anode-cathode gap near the main load) of the Z-Machine high-current generator (Sandia National Laboratories, United States) was developed. The work included developing spectroscopic instruments, theoretical and experimental studies of EUV spectra of iron ions in well-diagnosed laser-produced plasmas, and a comparison of these spectra with those of plasmas created in the final anode-cathode gap of the transmission line. The EUV spectra of highly charged Fe ions in the spectral range lambda similar to 20-800 angstrom were investigated. In experiments performed at Sandia National Laboratories, spectra of FeXIII-FeXVII ions were observed. A comparison of the measured and calculated spectra shows that the electron plasma temperature in the anode-cathode gap is T (e) similar to 200 eV.
C1 [Shevelko, A. P.; Kazakov, E. D.; Tolstikhina, I. Yu.] Russian Acad Sci, Lebedev Phys Inst, Moscow 119991, Russia.
[Bliss, D. E.; Mazarakis, M. G.; McGurn, J. S.; Struve, K. W.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Knight, L. V.; Weeks, T. J.] Brigham Young Univ, Provo, UT 84602 USA.
RP Shevelko, A (reprint author), Russian Acad Sci, Lebedev Phys Inst, Leninskii Pr 53, Moscow 119991, Russia.
RI Tolstikhina, Inga/L-3576-2013; Kazakov, Evgeny/A-8314-2014; Shevelko,
Alexander/N-1599-2015
FU SNL; MOXTEK Inc. [303049]; Lebedev Physical Institute [469254]
FX We thank G. Sarkisov and D. Brown (Sandia National Laboratories,
Albuquerque, NM) for their technical support. We also thank G. Stewart
(MOXTEK Inc., Orem, UT), S. N. Andreev, I. L. Beigman, and M. A. Mazing
(Lebedev Physical Institute, Russian Academy of Sciences, Moscow,
Russia) for helpful discussions and fruitful cooperation. This work was
performed under the cooperation agreements between SNL and MOXTEK Inc.
(contract no. 303049) and between SNL and the Lebedev Physical Institute
(contract no. 469254).
NR 19
TC 12
Z9 12
U1 0
U2 2
PU MAIK NAUKA/INTERPERIODICA/SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013-1578 USA
SN 1063-780X
J9 PLASMA PHYS REP+
JI Plasma Phys. Rep.
PD NOV
PY 2008
VL 34
IS 11
BP 944
EP 954
DI 10.1134/S1063780X08110081
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 370SH
UT WOS:000260782900008
ER
PT J
AU Barnat, EV
Miller, PA
Paterson, AM
AF Barnat, E. V.
Miller, P. A.
Paterson, A. M.
TI RF discharge under the influence of a transverse magnetic field
SO PLASMA SOURCES SCIENCE & TECHNOLOGY
LA English
DT Article
ID COUPLED PLASMA SOURCES; REFERENCE CELL; REACTOR; ETCH; OPTIMIZATION;
TECHNOLOGY; TRANSPORT; VOLTAGE; DRIVEN
AB We examine the effects of an externally applied magnetic field (0-150 G) on an argon discharge generated capacitively at 13.56 MHz, in a Gaseous Electronics Conference reference cell. Dependence of the electrical characteristics of the discharge are measured as functions of applied magnetic field, rf power and argon pressure. At fixed power the rf voltage decreases with increasing magnetic field. Likewise, the impedance of the discharge is capacitive but becomes more resistive as the electron mobility becomes limited by the magnetic field. The impact of the magnetic field is found to diminish as the cyclotron frequency of the electron becomes smaller than that of the collision frequency of the electron. We also measure the impact the magnetic field has on the distribution of the plasma in vertical planes parallel and perpendicular to the magnetic field using Langmuir probes, optical emission and laser-induced fluorescence. It is found that the distribution of the plasma remains symmetric in the plane parallel to the magnetic field and becomes skewed in the plane perpendicular to the magnetic field. The degree of skew depends on the optical state probed. Finally, we examine the spatial distribution and the temporal evolution of the electric fields in the plasma. It is shown that with the presence of the magnetic field, the thickness of the sheath is reduced and that most of the voltage drop is contained within the sheath. Consistent with dc voltage trends, there was no significant sheath reversal observed at higher magnetic fields. Comparisons of the results presented here are made with trends predicted by models and simulations found in the literature.
C1 [Barnat, E. V.; Miller, P. A.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Paterson, A. M.] Appl Mat Inc, Sunnyvale, CA 94086 USA.
RP Barnat, EV (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM evbarna@sandia.gov
NR 28
TC 6
Z9 6
U1 0
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0963-0252
J9 PLASMA SOURCES SCI T
JI Plasma Sources Sci. Technol.
PD NOV
PY 2008
VL 17
IS 4
AR 045005
DI 10.1088/0963-0252/17/4/045005
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 372HB
UT WOS:000260891600005
ER
PT J
AU Yan, HH
Talbert, PB
Lee, HR
Jett, J
Henikoff, S
Chen, F
Jiang, JM
AF Yan, Huihuang
Talbert, Paul B.
Lee, Hye-Ran
Jett, Jamie
Henikoff, Steven
Chen, Feng
Jiang, Jiming
TI Intergenic Locations of Rice Centromeric Chromatin
SO PLOS BIOLOGY
LA English
DT Article
ID HISTONE H3 VARIANT; SATELLITE REPEAT; DNA; EVOLUTION; NEOCENTROMERES;
SEQUENCE; GENOME; TRANSCRIPTION; KINETOCHORE; DOMAINS
AB Centromeres are sites for assembly of the chromosomal structures that mediate faithful segregation at mitosis and meiosis. Plant and animal centromeres are typically located in megabase-sized arrays of tandem satellite repeats, making their precise mapping difficult. However, some rice centromeres are largely embedded in nonsatellite DNA, providing an excellent model to study centromere structure and evolution. We used chromatin immunoprecipitation and 454 sequencing to define the boundaries of nine of the 12 centromeres of rice. Centromere regions from chromosomes 8 and 9 were found to share synteny, most likely reflecting an ancient genome duplication. For four centromeres, we mapped discrete subdomains of binding by the centromeric histone variant CENH3. These subdomains were depleted in both intact and nonfunctional genes relative to interspersed subdomains lacking CENH3. The intergenic location of rice centromeric chromatin resembles the situation for human neocentromeres and supports a model of the evolution of centromeres from gene-poor regions.
C1 [Jett, Jamie; Chen, Feng] US DOE, Joint Genome Inst, Walnut Creek, CA USA.
[Yan, Huihuang; Lee, Hye-Ran; Jiang, Jiming] Univ Wisconsin, Dept Hort, Madison, WI 53706 USA.
[Talbert, Paul B.; Henikoff, Steven] Fred Hutchinson Canc Res Ctr, Howard Hughes Med Inst, Seattle, WA 98104 USA.
RP Chen, F (reprint author), US DOE, Joint Genome Inst, Walnut Creek, CA USA.
EM fchen@lbl.gov; jjiang1@wisc.edu
RI Jiang, Jiming/A-9614-2009
FU University of California; Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]; Lawrence Berkeley National Laboratory
[DE-AC02-05CH11231]; Los Alamos National Laborator [DE-AC02-06NA25396];
National Science Foundation [DBI-0603927]; US Department of Agriculture
Cooperative State Research, Education, and Extension Service (CSREES)
[2006-35604-16649]
FX The sequencing was performed under the auspices of the US Department of
Energy's Office of Science, Biological and Environmental Research
Program and by the University of California, Lawrence Livermore National
Laboratory under Contract No. DE-AC52-07NA27344, Lawrence Berkeley
National Laboratory under contract No. DE-AC02-05CH11231, and Los Alamos
National Laboratory under contract No. DE-AC02-06NA25396. This research
was supported by grant DBI-0603927 from the National Science Foundation
and grant 2006-35604-16649 from the US Department of Agriculture
Cooperative State Research, Education, and Extension Service (CSREES) to
J. Jiang.
NR 55
TC 51
Z9 52
U1 1
U2 6
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1544-9173
J9 PLOS BIOL
JI PLoS. Biol.
PD NOV
PY 2008
VL 6
IS 11
BP 2563
EP 2575
AR e286
DI 10.1371/journal.pbio.0060286
PG 13
WC Biochemistry & Molecular Biology; Biology
SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other
Topics
GA 376MO
UT WOS:000261187900022
PM 19067486
ER
PT J
AU Yandell, M
Moore, B
Salas, F
Mungall, C
MacBride, A
White, C
Reese, MG
AF Yandell, Mark
Moore, Barry
Salas, Fidel
Mungall, Chris
MacBride, Andrew
White, Charles
Reese, Martin G.
TI Genome-Wide Analysis of Human Disease Alleles Reveals That Their
Locations Are Correlated in Paralogous Proteins
SO PLOS COMPUTATIONAL BIOLOGY
LA English
DT Article
ID AMINO-ACID SUBSTITUTIONS; ALAGILLE-SYNDROME; GENE CONVERSION; EVOLUTION;
JAGGED1; ASSOCIATION; MUTATIONS; DATABASE; GROWTH
AB The millions of mutations and polymorphisms that occur in human populations are potential predictors of disease, of our reactions to drugs, of predisposition to microbial infections, and of age-related conditions such as impaired brain and cardiovascular functions. However, predicting the phenotypic consequences and eventual clinical significance of a sequence variant is not an easy task. Computational approaches have found perturbation of conserved amino acids to be a useful criterion for identifying variants likely to have phenotypic consequences. To our knowledge, however, no study to date has explored the potential of variants that occur at homologous positions within paralogous human proteins as a means of identifying polymorphisms with likely phenotypic consequences. In order to investigate the potential of this approach, we have assembled a unique collection of known disease-causing variants from OMIM and the Human Genome Mutation Database (HGMD) and used them to identify and characterize pairs of sequence variants that occur at homologous positions within paralogous human proteins. Our analyses demonstrate that the locations of variants are correlated in paralogous proteins. Moreover, if one member of a variant-pair is disease-causing, its partner is likely to be disease-causing as well. Thus, information about variant-pairs can be used to identify potentially disease-causing variants, extend existing procedures for polymorphism prioritization, and provide a suite of candidates for further diagnostic and therapeutic purposes.
C1 [Yandell, Mark; Moore, Barry] Univ Utah, Sch Med, Eccles Inst Human Genet, Salt Lake City, UT 84112 USA.
[Salas, Fidel; MacBride, Andrew; White, Charles; Reese, Martin G.] Omicia, Emeryville, CA USA.
[Mungall, Chris] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Yandell, M (reprint author), Univ Utah, Sch Med, Eccles Inst Human Genet, Salt Lake City, UT 84112 USA.
EM myandell@genetics.utah.edu; mreese@omicia.com
RI Sincan, Murat /A-3794-2010
FU NIH SBIR [1R43 HG003667, 1R44HG002993]
FX This work was supported by NIH SBIR grants 1R43 HG003667 and
1R44HG002993, administered by the National Human Genome Research
Institute (NHGRI) to Omicia Inc.
NR 32
TC 10
Z9 11
U1 0
U2 1
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1553-734X
J9 PLOS COMPUT BIOL
JI PLoS Comput. Biol.
PD NOV
PY 2008
VL 4
IS 11
AR e1000218
DI 10.1371/journal.pcbi.1000218
PG 7
WC Biochemical Research Methods; Mathematical & Computational Biology
SC Biochemistry & Molecular Biology; Mathematical & Computational Biology
GA 380QR
UT WOS:000261480800010
PM 18989397
ER
PT J
AU Modesti, M
Besco, S
Lorenzetti, A
Zammarano, M
Causin, V
Marega, C
Gilman, JW
Fox, DM
Trulove, PC
De Long, HC
Maupin, PH
AF Modesti, M.
Besco, S.
Lorenzetti, A.
Zammarano, M.
Causin, V.
Marega, C.
Gilman, J. W.
Fox, D. M.
Trulove, P. C.
De Long, H. C.
Maupin, P. H.
TI Imidazolium-modified clay-based ABS nanocomposites: a comparison between
melt-blending and solution-sonication processes
SO POLYMERS FOR ADVANCED TECHNOLOGIES
LA English
DT Article
DE ABS; imidazolium salts; solution processing; melt-blending;
nanocomposites; Nile Blue A; fluorescence probe
ID POLYMER/LAYERED SILICATE NANOCOMPOSITES; THERMAL-DEGRADATION;
EXFOLIATION; MODEL; MONTMORILLONITE; AMMONIUM; BEHAVIOR
AB Acrylonitrile--butadiene--styrene (ABS) nanocomposites containing imidazolium-modified montmorillonite have been prepared by melt-blending (MB) and solution-sonication in order to study the effects of processing on the morphology and properties of the polymer/clay composites. The structure-property relationships of the prepared composites have been studied by means of X-ray diffraction (XRD), transmission electron microscopy (TEM), mechanical testing, dynamic-mechanical analyses (DMA), thermal gravimetrical analyses (TGA), fluorescence probe confocal microscopy, and fluorescence spectroscopy (FS). X-Ray and TEM show that both nanocomposites have a mixed intercalated/exfoliated structure. Fluorescence probe confocal microscopy reveals that the sonicated sample has a more homogeneous dispersion: this result is confirmed by the values of elongation at break and flexural elastic modulus measured for the composites. Fluorescence spectroscopy has also been used to investigate the distribution of clay in the composites and results indicate that clay layers in ABS are preferentially located in the styrene-acrylonitrile (SAN) phase, independent of the dispersion process used. Published in 2008 by John Wiley & Sons, Ltd.
C1 [Modesti, M.; Besco, S.; Lorenzetti, A.] Univ Padua, Dept Chem Proc Engn, I-35131 Padua, Italy.
[Zammarano, M.; Gilman, J. W.] Natl Inst Stand & Technol, Bldg & Fire Res Lab, Gaithersburg, MD 20899 USA.
[Causin, V.; Marega, C.] Univ Padua, Dept Chem Sci, I-35131 Padua, Italy.
[Fox, D. M.] American Univ, Dept Chem, Washington, DC 20016 USA.
[Trulove, P. C.] USN Acad, Dept Chem, Annapolis, MD 21402 USA.
[De Long, H. C.] USAF, Off Sci Res, Directorate Chem & Life Sci, Arlington, VA 22203 USA.
[Maupin, P. H.] US DOE, Off Sci, Off Basic Energy Sci, Washington, DC 20585 USA.
RP Modesti, M (reprint author), Univ Padua, Dept Chem Proc Engn, I-35131 Padua, Italy.
EM michele.modesti@unipd.it
OI causin, valerio/0000-0002-2581-8445
NR 21
TC 13
Z9 13
U1 0
U2 13
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1042-7147
EI 1099-1581
J9 POLYM ADVAN TECHNOL
JI Polym. Adv. Technol.
PD NOV
PY 2008
VL 19
IS 11
BP 1576
EP 1583
DI 10.1002/pat.1172
PG 8
WC Polymer Science
SC Polymer Science
GA 375VM
UT WOS:000261141900018
ER
PT J
AU Cruden, A
Houghton, T
Gair, S
Duerr, M
Agnew, GD
Stewart, EM
Lutz, A
AF Cruden, A.
Houghton, T.
Gair, S.
Duerr, M.
Agnew, G. D.
Stewart, E. M.
Lutz, A.
TI Fuel cells as distributed generation
SO PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF
POWER AND ENERGY
LA English
DT Article
DE fuel cell; distributed generation
AB This paper presents an overview of fuel cells as a form of distributed generation within the context of a highly distributed power system, by discussing some example demonstration systems categorized by the type of primary fuel used, namely fossil fuels, hydrogen gas, or biofuels. It discusses the background to fuel cells as a stationary, grid connected, power Source, briefly compared with conventional thermal electrical generation, while describing the main characteristics of their performance and an electric equivalent circuit model. Additionally it presents a view of the current state of commercialization of fuel cell technology for stationary power applications.
C1 [Cruden, A.] Univ Strathclyde, Dept Elect & Elect Engn, Royal Coll, Glasgow G1 1XW, Lanark, Scotland.
[Duerr, M.; Agnew, G. D.] Rolls Royce Fuel Cell Syst Ltd, Derby, England.
[Stewart, E. M.; Lutz, A.] Sandia Natl Labs, Livermore, CA USA.
RP Cruden, A (reprint author), Univ Strathclyde, Dept Elect & Elect Engn, Royal Coll, 204 George St, Glasgow G1 1XW, Lanark, Scotland.
EM a.cruden@eee.strath.ac.uk
NR 19
TC 1
Z9 1
U1 0
U2 3
PU PROFESSIONAL ENGINEERING PUBLISHING LTD
PI WESTMINISTER
PA 1 BIRDCAGE WALK, WESTMINISTER SW1H 9JJ, ENGLAND
SN 0957-6509
J9 P I MECH ENG A-J POW
JI Proc. Inst. Mech. Eng. Part A-J. Power Energy
PD NOV
PY 2008
VL 222
IS A7
SI SI
BP 707
EP 720
DI 10.1243/09576509JPE609
PG 14
WC Engineering, Mechanical
SC Engineering
GA 374XW
UT WOS:000261078000008
ER
PT J
AU Muske, KR
Jones, JCP
Kirschman, JS
Frey, JC
Makki, IH
Uhrich, MJ
Howse, JW
AF Muske, K. R.
Jones, J. C. Peyton
Kirschman, J. S.
Frey, J. C.
Makki, I. H.
Uhrich, M. J.
Howse, J. W.
TI Probability density diagnostic metric for an integrated three-way
catalyst controller and monitor
SO PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF
AUTOMOBILE ENGINEERING
LA English
DT Article
DE probability density; diagnostic metric; three-way catalyst controller
and monitor
AB An integrated model-based methodology for three-way automotive catalyst control and diagnostic monitoring is presented in this work. The catalyst controller and monitor both utilize a limited integrator catalyst oxygen storage model with an adaptive integral gain. This adaptive catalyst gain, which is a measure of the catalyst oxygen storage capacity, is used by the controller to provide information on the dynamic catalyst behaviour and by the diagnostic monitor to provide information on long-term catalyst deactivation and short-term emission control device failure. A statistical classification technique based on the fraction of time that the catalyst gain values in a moving window are within a threshold of zero is employed as the test metric for on-board diagnostic monitoring. The performance of the catalyst monitor is demonstrated with experimental vehicle test data from a 4.61 ULEV II gasoline engine operated over a series of Environmental Protection Agency Federal Test Procedure drive cycles with differently aged catalysts. Preliminary results indicate that it is possible to perform very accurate discrimination between catalyst operation, even near the on-board diagnostic detection threshold, using this technique.
C1 [Muske, K. R.; Jones, J. C. Peyton; Kirschman, J. S.] Villanova Univ, Ctr Nonlinear Dynam & Control, Villanova, PA 19085 USA.
[Frey, J. C.] Villanova Univ, Dept Math Sci, Villanova, PA 19085 USA.
[Makki, I. H.; Uhrich, M. J.] Ford Motor Co, Powertrain Res & Dev, Dearborn, MI 48121 USA.
[Howse, J. W.] Los Alamos Natl Lab, Modeling Algorithms & Informat Grp, Los Alamos, NM USA.
RP Muske, KR (reprint author), Villanova Univ, Ctr Nonlinear Dynam & Control, 800 Lancaster Ave, Villanova, PA 19085 USA.
EM kenneth.muske@villanova.edu
FU Ford Motor Company; National Science Foundation [CTS-0215920.]
FX The first four authors gratefully acknowledge support for this work from
Ford Motor Company, Johnson Matthey, ExxonMobil, and the National
Science Foundation under Grant CTS-0215920.
NR 17
TC 0
Z9 0
U1 0
U2 2
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 0954-4070
EI 2041-2991
J9 P I MECH ENG D-J AUT
JI Proc. Inst. Mech. Eng. Part D-J. Automob. Eng.
PD NOV
PY 2008
VL 222
IS D11
BP 2185
EP 2194
DI 10.1243/09544070JAUTO744
PG 10
WC Engineering, Mechanical; Transportation Science & Technology
SC Engineering; Transportation
GA 389MG
UT WOS:000262096500019
ER
PT J
AU Mulligan, EA
Dunn, JJ
AF Mulligan, Elizabeth A.
Dunn, John J.
TI Cloning, purification and initial characterization of E. coli McrA, a
putative 5-methylcytosine-specific nuclease
SO PROTEIN EXPRESSION AND PURIFICATION
LA English
DT Article
DE McrA; Zn2+ finger; DNA methylation; C-5-methylcytosine (m(5)C); DNA
binding; CpG island affinity purification
ID PROTEIN SECONDARY STRUCTURE; DNA GLYCOSYLASE/LYASE ROS1;
ESCHERICHIA-COLI; CIRCULAR-DICHROISM; METHYLATION PATTERNS; CPG ISLANDS;
RESTRICTION; ARABIDOPSIS; EXPRESSION; CANCER
AB Expression strains of Escherichia coli BL21(DE3) overproducing the E. coli m(5)C McrA restriction protein were produced by cloning the mcrA coding sequence behind a T7 promoter. The recombinant mcrA minus BL21 (DE3) host produces active McrA as evidenced by its acquired ability to selectively restrict the growth of T7 phage containing DNA methylated in vitro by HpaII methylase. The mcrA coding region contains several non-optimal E. coli triplets. Addition of the pACYC-RIL tRNA encoding plasmid to the BL21(DE3) host increased the yield of recombinant McrA (rMcrA) upon induction about 5- to 10-fold. McrA protein expressed at 37 degrees C is insoluble but a significant fraction is recovered as soluble protein after autoinduction at 20 degrees C. rMcrA protein, which is predicted to contain a Cys(4)-Zn2+ finger and a catalytically important histidine triad in its putative nuclease domain, binds to several metal chelate resins without addition of a poly-histidine affinity tag. This feature was used to develop an efficient protocol for the rapid purification of nearly homogeneous rMcrA. The native protein is a dinner with a high alpha-helical content as measured by circular dichroism analysis. Under all conditions tested purified rMcrA does not have measurable nuclease activity on HpaII methylated (Cm(5)CGG) DNA, although the purified protein does specifically bind HpaII methylated DNA. These results have implications for understanding the in vivo activity of McrA in "restricting" m(5)C-containing DNA and suggest that rMcrA may have utility as a reagent for affinity purification of DNA fragments containing m(5)C residues. (C) 2008 Elsevier Inc. All rights reserved.
C1 [Mulligan, Elizabeth A.; Dunn, John J.] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
[Mulligan, Elizabeth A.] SUNY Stony Brook, Sch Med, Dept Mol Genet & Microbiol, Stony Brook, NY 11794 USA.
RP Dunn, JJ (reprint author), Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
EM jdunn@BNL.gov
FU Laboratory Directed Research and Development Award at Brookhaven
National Laboratory; Low Dose Radiation Research Program of the Office
of Biological and Environmental Research (BER); NIH [U01-AI56480];
BER-DOE
FX This work was supported by a Laboratory Directed Research and
Development Award at Brookhaven National Laboratory, the Low Dose
Radiation Research Program of the Office of Biological and Environmental
Research (BER) program of the U.S. Department of Energy (DOE). J.J.D.
was also supported by NIH Grant U01-AI56480. We thank John Trunk for CD
analysis using beamline U11 at the NSLS which is supported by BER-DOE.
We also acknowledge the help of Mike Blewitt, Ed Whittle and Vito
Graziano in analytical analysis of rMcrA and the technical assistance of
Barbara Lade, Laura-Li Loffredo and Judi Romeo in this work.
NR 28
TC 11
Z9 11
U1 0
U2 3
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1046-5928
J9 PROTEIN EXPRES PURIF
JI Protein Expr. Purif.
PD NOV
PY 2008
VL 62
IS 1
BP 98
EP 103
DI 10.1016/j.pep.2008.06.016
PG 6
WC Biochemical Research Methods; Biochemistry & Molecular Biology;
Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA 360MP
UT WOS:000260061900014
PM 18662788
ER
PT J
AU Londer, YY
Giuliani, SE
Peppler, T
Collart, FR
AF Londer, Yuri Y.
Giuliani, Sarah E.
Peppler, Terese
Collart, Frank R.
TI Addressing Shewanella oneidensis "cytochromome": The first step towards
high-throughput expression of cytochromes c
SO PROTEIN EXPRESSION AND PURIFICATION
LA English
DT Article
DE Cytochrome c; High-throughput; Ligation-independent cloning; Periplasmic
expression; Protein expression; Shewanella oneidensis
ID ESCHERICHIA-COLI; GEOBACTER-SULFURREDUCENS; PUTREFACIENS MR-1; SIGNAL
PEPTIDES; HETEROLOGOUS EXPRESSION; MULTIDOMAIN CYTOCHROME; FUNCTIONAL
EXPRESSION; ANTIBODY FRAGMENTS; GENE SYNTHESIS; PREDICTION
AB Integrated studies that address proteins structure and function in the new era of systems biology and genomics often require the application of high-throughput approaches for parallel production of many different purified proteins from the same organism. Cytochromes c-electron transfer proteins carrying one or more hemes covalently bound to the polypeptide chain-are essential in most organisms. However, they are one of the most recalcitrant classes of proteins with respect to heterologous expression because post-translational incorporation of hemes is required for proper folding and stability. We have addressed this challenge by designing two families of vectors (total of 6 vectors) suitable for ligation-independent cloning and developing a pipeline for expression and solubility analysis of cytochromes c. This stem has been validated by expression analysis of thirty genes from Shewanella oneidensis coding for cytochromes c or cytochromes c-type domains predicted to have 1-4 hemes. Out of 30 targets, 26 (87%) were obtained in soluble form in one or more vectors. This work establishes a methodology for high-throughput expression of this class of proteins and provides a clone resource for the microbiological and functional genomics research communities. (C) 2008 Elsevier Inc. All rights reserved.
C1 [Londer, Yuri Y.; Giuliani, Sarah E.; Peppler, Terese; Collart, Frank R.] Argonne Natl Lab, Biosci Div, Argonne, IL 60439 USA.
RP Londer, YY (reprint author), Argonne Natl Lab, Biosci Div, 9700 S Cass Ave,Bldg 202, Argonne, IL 60439 USA.
EM londer@neb.com
OI Collart, Frank/0000-0001-6942-4483
FU U.S. Department of Energy's Office of Science, Biological and
Environmental Research GTL program [DE-AC02-06CH11357]
FX We are grateful to Dr. L. Thony-Meyer (ETH, Zurich, Switzerland) for
plasmid pEC86 and Dr. M. Romine (Pacific Northwest National Laboratory)
for helpful discussions and critical reading of this manuscript. This
work was supported by the U.S. Department of Energy's Office of Science,
Biological and Environmental Research GTL program under Contract No.
DE-AC02-06CH11357.
NR 50
TC 12
Z9 12
U1 2
U2 9
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1046-5928
J9 PROTEIN EXPRES PURIF
JI Protein Expr. Purif.
PD NOV
PY 2008
VL 62
IS 1
BP 128
EP 137
DI 10.1016/j.pep.2008.06.014
PG 10
WC Biochemical Research Methods; Biochemistry & Molecular Biology;
Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA 360MP
UT WOS:000260061900019
PM 18657620
ER
PT J
AU Bjorklund, AK
Light, S
Hedin, L
Elofsson, A
AF Bjorklund, Asa K.
Light, Sara
Hedin, Linnea
Elofsson, Arne
TI Quantitative assessment of the structural bias in protein-protein
interaction assays
SO PROTEOMICS
LA English
DT Article
DE Abundance; Disorder; Protein-protein interactions; Tandem affinity
purification; Yeast two hybrid
ID SACCHAROMYCES-CEREVISIAE; INTERACTION NETWORKS; INTRINSIC DISORDER; HUB
PROTEINS; YEAST; COMPLEXES; DATABASE; MAP; RESOURCE; REPEATS
AB With recent publications of several large-scale protein-protein interaction (PPI) studies, the realization of the full yeast interaction network is getting closer. Here, we have analysed several yeast protein interaction datasets to understand their strengths and weaknesses. In particular, we investigate the effect of experimental biases on some of the protein properties suggested to be enriched in highly connected proteins. Finally, we use support vector machines (SVM) to assess the contribution of these properties to protein interactivity. We find that protein abundance is the most important factor for detecting interactions in tandem affinity purifications (TAP), while it is of less importance for Yeast Two Hybrid (Y2H) screens. Consequently, sequence conservation and/or essentiality of hubs may be related to their high abundance. Further, proteins with disordered structure are over-represented in Y2H screens and in one, but not the other, large-scale TAP assay. Hence, disordered regions may be important both in transient interactions and interactions in complexes. Finally, a few domain families seem to be responsible for a large part of all interactions. Most importantly, we show that there are method-specific biases in PPI experiments. Thus, care should be taken before drawing strong conclusions based on a single dataset.
C1 [Bjorklund, Asa K.; Hedin, Linnea; Elofsson, Arne] Stockholm Univ, Dept Biochem & Biophys, Stockholm Bioinformat Ctr, Ctr Biol Membrane Res, SE-10691 Stockholm, Sweden.
[Light, Sara] Lawrence Livermore Natl Lab, Computat Directorate, Sci & Technol Comp Div, Livermore, CA USA.
RP Elofsson, A (reprint author), Stockholm Univ, Dept Biochem & Biophys, Stockholm Bioinformat Ctr, Ctr Biol Membrane Res, SE-10691 Stockholm, Sweden.
EM arne@bioinfo.se
RI Bjorklund, Asa /J-4587-2013;
OI Bjorklund, Asa /0000-0003-2224-7090; Elofsson, Arne/0000-0002-7115-9751
FU Swedish Natural Sciences Research Council; SSF (the Foundation for
Strategic Research); EU [LSHG-CT-2004-503567]; US Department of Energy
[DE-AC52-07NA27344]
FX This work was supported by grants from the Swedish Natural Sciences
Research Council, SSF (the Foundation for Strategic Research) and the EU
Sixth Framework Program is gratefully acknowledged for support to the
GeneFun project, contract No: LSHG-CT-2004-503567. Furthermore, this
work was partly performed under the auspices of the US Department of
Energy by Lawrence Livermore National Laboratory under Contract
DE-AC52-07NA27344.
NR 43
TC 14
Z9 14
U1 0
U2 3
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1615-9853
J9 PROTEOMICS
JI Proteomics
PD NOV
PY 2008
VL 8
IS 22
BP 4657
EP 4667
DI 10.1002/pmic.200800150
PG 11
WC Biochemical Research Methods; Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 379EU
UT WOS:000261380300007
PM 18924110
ER
PT J
AU Beresford, NA
Barnett, CL
Brown, JE
Cheng, JJ
Copplestone, D
Filistovic, V
Hosseini, A
Howard, BJ
Jones, SR
Kamboj, S
Kryshev, A
Nedveckaite, T
Olyslaegers, G
Saxen, R
Sazykina, T
Batlle, JVI
Vives-Lynch, S
Yankovich, T
Yu, C
AF Beresford, N. A.
Barnett, C. L.
Brown, J. E.
Cheng, J. J.
Copplestone, D.
Filistovic, V.
Hosseini, A.
Howard, B. J.
Jones, S. R.
Kamboj, S.
Kryshev, A.
Nedveckaite, T.
Olyslaegers, G.
Saxen, R.
Sazykina, T.
Batlle, J. Vives i
Vives-Lynch, S.
Yankovich, T.
Yu, C.
TI Inter-comparison of models to estimate radionuclide activity
concentrations in non-human biota
SO RADIATION AND ENVIRONMENTAL BIOPHYSICS
LA English
DT Article
ID RADIATION; EXPOSURE
AB A number of models have recently been, or are currently being, developed to enable the assessment of radiation doses from ionising radiation to non-human species. A key component of these models is the ability to predict whole-organism activity concentrations in a wide range of wildlife. In this paper, we compare the whole-organism activity concentrations predicted by eight models participating within the IAEA Environmental Modelling for Radiation Safety programme for a range of radionuclides to terrestrial and freshwater organisms. In many instances, there was considerable variation, ranging over orders of magnitude, between the predictions of the different models. Reasons for this variability (including methodology, data source and data availability) are identified and discussed. The active participation of groups responsible for the development of key models within this exercise is a useful step forward in providing the transparency in methodology and data provenance required for models which are either currently being used for regulatory purposes or which may be used in the future. The work reported in this paper, and supported by other findings, demonstrates that the largest contribution to variability between model predictions is the parameterisation of their transfer components. There is a clear need to focus efforts and provide authoritative compilations of those data which are available.
C1 [Beresford, N. A.; Barnett, C. L.; Howard, B. J.] Lancaster Environm Ctr, Ctr Ecol & Hydrol Lancaster, Lancaster LA1 4AP, England.
[Brown, J. E.; Hosseini, A.] Norwegian Radiat Protect Author, Osteras, Norway.
[Cheng, J. J.; Kamboj, S.; Yu, C.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Copplestone, D.] England & Wales Environm Agcy, Warrington, Cheshire, England.
[Filistovic, V.; Nedveckaite, T.] Lithuania Acad Sci, Inst Phys, LT-232600 Vilnius, Lithuania.
[Jones, S. R.; Batlle, J. Vives i; Vives-Lynch, S.] Westlakes Res Inst, Moor Row, Cumbria, England.
[Kryshev, A.; Sazykina, T.] SPA Typhoon, Obninsk, Russia.
[Olyslaegers, G.] CEN SCK, B-2400 Mol, Belgium.
[Saxen, R.] Radiat & Nucl Safety Author STUK, Helsinki, Finland.
[Yankovich, T.] Atom Energy Canada Ltd, Chalk River, ON K0J 1J0, Canada.
RP Beresford, NA (reprint author), Lancaster Environm Ctr, Ctr Ecol & Hydrol Lancaster, Lib Av,Bailrigg, Lancaster LA1 4AP, England.
EM nab@ceh.ac.uk
RI Howard, Brenda/I-8279-2012; Beresford, Nicholas/I-6188-2012;
OI Howard, Brenda/0000-0002-9698-9524; Copplestone,
David/0000-0002-1468-9545
NR 50
TC 44
Z9 45
U1 0
U2 12
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0301-634X
J9 RADIAT ENVIRON BIOPH
JI Radiat. Environ. Biophys.
PD NOV
PY 2008
VL 47
IS 4
BP 491
EP 514
DI 10.1007/s00411-008-0186-8
PG 24
WC Biology; Biophysics; Environmental Sciences; Radiology, Nuclear Medicine
& Medical Imaging
SC Life Sciences & Biomedicine - Other Topics; Biophysics; Environmental
Sciences & Ecology; Radiology, Nuclear Medicine & Medical Imaging
GA 359OJ
UT WOS:000259997000010
PM 18679701
ER
PT J
AU Bucci, P
Kirschenbaum, J
Mangan, LA
Aldemir, T
Smith, C
Wood, T
AF Bucci, Paolo
Kirschenbaum, Jason
Mangan, L. Anthony
Aldemir, Tunc
Smith, Curtis
Wood, Ted
TI Construction of event-tree/fault-tree models from a Markov approach to
dynamic system reliability
SO RELIABILITY ENGINEERING & SYSTEM SAFETY
LA English
DT Article
DE Markov; dynamic reliability; PRA; dynamic event tree; dynamic fault tree
ID FAILURE ANALYSIS; SAFETY ANALYSIS
AB While the event-tree (ET)/fault-tree (FT) methodology is the most popular approach to probability risk assessment (PRA), concerns have been raised in the literature regarding its potential limitations in the reliability modeling of dynamic systems. Markov reliability models have the ability to capture the statistical dependencies between failure events that can arise in complex dynamic systems. A methodology is presented that combines Markov modeling with the cell-to-cell mapping technique (CCMT) to construct dynamic ETs/FTs and addresses the concerns with the traditional ET/FT methodology. The approach is demonstrated using a simple water level control system. It is also shown how the generated ETs/FTs can be incorporated into an existing PRA so that only the (sub)systems requiring dynamic methods need to be analyzed using this approach while still leveraging the static model of the rest of the system. (c) 2008 Elsevier Ltd. All rights reserved.
C1 [Mangan, L. Anthony; Aldemir, Tunc] Ohio State Univ, Nucl Engn Program, Columbus, OH 43210 USA.
[Bucci, Paolo; Kirschenbaum, Jason] Ohio State Univ, Dept Comp Sci & Engn, Columbus, OH 43210 USA.
[Smith, Curtis; Wood, Ted] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Aldemir, T (reprint author), Ohio State Univ, Nucl Engn Program, 427 Scott Lab,201 W 19th Ave, Columbus, OH 43210 USA.
EM bucci.2@osu.edu; kirschen@cse.ohio-state.edu; mangan.10@osu.edu;
aldemir.1@osu.edu
NR 30
TC 33
Z9 37
U1 0
U2 32
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 NOV
PY 2008
VL 93
IS 11
BP 1616
EP 1627
DI 10.1016/j.ress.2008.01.008
PG 12
WC Engineering, Industrial; Operations Research & Management Science
SC Engineering; Operations Research & Management Science
GA 316YK
UT WOS:000256985600005
ER
PT J
AU Tsiamis, G
Katsaveli, K
Ntougias, S
Kyrpides, N
Andersen, G
Piceno, Y
Bourtzis, K
AF Tsiamis, George
Katsaveli, Katerina
Ntougias, Spyridon
Kyrpides, Nikos
Andersen, Gary
Piceno, Yvette
Bourtzis, Kostas
TI Prokaryotic community profiles at different operational stages of a
Greek solar saltern
SO RESEARCH IN MICROBIOLOGY
LA English
DT Article
DE Halophiles; Prokaryotic diversity; Hypersaline; PhyloChip;
MikroBioKosmos
ID 16S RIBOSOMAL-RNA; EXTREMELY HALOPHILIC ARCHAEA; HYPERSALINE MICROBIAL
MAT; SALINITY GRADIENT; SEQUENCE-ANALYSIS; CRYSTALLIZER PONDS; ANAEROBIC
GROWTH; GEN. NOV.; DIVERSITY; BACTERIA
AB A combination of culture-dependent and independent approaches was employed to identify the microbial community structure in a Greek solar saltem. A total of 219 and 132 isolates belonging, respectively, to Bacteria and Archaea, were recovered. All bacterial isolates were phylogenetically related to 43 members of Actinobacteria, Firmicutes and gamma-Proteobacteria. The archaeal isolates were placed within the Halobacteriaceae. At least four groups of isolates represented novel species among the Bacteria. High bacterial diversity, consisting of 417 subfamilies, was revealed using a high-density oligonucleotide microarray (PhyloChip). At the four stages of saltem operation analyzed, the archaeal community consisted of both Crenarchaeota and Euryarchaeota, except for the sediment where Crenarchaeota were not detected. The bacterial community in sediment consisted mainly of gamma-Proteobacteria and Actinobacteria, while, in hypersaline water, it was restricted to a few representatives of Bacteria. Members of alpha-Proteobacteria were the main constituents in saturated brine and crude salt, followed by gamma-Proteobacteria, Actinobacteria and Firmicutes. A large Bacteroidetes and Verrucomicrobia diversity was identified in saturated brine, while delta-Proteobacteria and Cloroflexi were abundant in crude salt. Significant changes in the microbial community structure were detected during a short time period, denoting a rapidly adaptive dynamic ecosystem and viable diversity. Prokaryotic members reported for the first time in solar salterns were identified. (C) 2008 Elsevier Masson SAS. All fights reserved.
C1 [Tsiamis, George; Katsaveli, Katerina; Bourtzis, Kostas] Univ Ioannina, Dept Environm & Nat Resources Management, GR-45110 Ioannina, Greece.
[Ntougias, Spyridon] Natl Agr Res Fdn, Inst Kalamata, Kalamata 24100, Greece.
[Kyrpides, Nikos] Genome Biol Program, Joint Genome Inst, Dept Energy, Walnut Creek, CA 94598 USA.
[Andersen, Gary; Piceno, Yvette] Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Environm Biotechnol, Berkeley, CA 94720 USA.
RP Bourtzis, K (reprint author), Univ Ioannina, Dept Environm & Nat Resources Management, 2 Seferi St, GR-45110 Ioannina, Greece.
EM gtsiamis@cc.uoi.gr; akatsave@cc.uoi.gr; sntougias@in.gr;
NCKyrpides@lbl.gov; GLAndersen@lbl.gov; YMPiceno@lbl.gov; kbourtz@uoi.gr
RI Piceno, Yvette/I-6738-2016; Andersen, Gary/G-2792-2015; Kyrpides,
Nikos/A-6305-2014;
OI Piceno, Yvette/0000-0002-7915-4699; Andersen, Gary/0000-0002-1618-9827;
Kyrpides, Nikos/0000-0002-6131-0462; Ntougias,
Spyridon/0000-0002-6389-692X
FU EU CSA-REGPROT [203590-MicrobeGR]; University of Ioannina
FX The authors thank Markos Mpilalis for help with sampling the salterns.
They also wish to acknowledge the Municipal Solar Saltern Enterprise
(MSSE) for allowing members of our research team to visit the grounds of
the company. Microarray chip raw data can be downloaded from
http://microbegr.env. uoi.gr or by sending an e-mail to the
corresponding author (kbourtz@uoi.gr). This work was partially supported
by EU CSA-REGPROT 203590-MicrobeGR and by intramural funds of the
University of Ioannina to K.B.
NR 68
TC 23
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U1 1
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0923-2508
J9 RES MICROBIOL
JI Res. Microbiol.
PD NOV-DEC
PY 2008
VL 159
IS 9-10
BP 609
EP 627
DI 10.1016/j.resmic.2008.09.007
PG 19
WC Microbiology
SC Microbiology
GA 389XW
UT WOS:000262129900005
PM 18976703
ER
PT J
AU Chaum, E
Karnowski, TP
Govindasamy, VP
Abdelrahman, M
Tobin, KW
AF Chaum, Edward
Karnowski, Thomas P.
Govindasamy, V. Priya
Abdelrahman, Mohamed
Tobin, Kenneth W.
TI AUTOMATED DIAGNOSIS OF RETINOPATHY BY CONTENT-BASED IMAGE RETRIEVAL
SO RETINA-THE JOURNAL OF RETINAL AND VITREOUS DISEASES
LA English
DT Article
DE content-based image retrieval; computer-aided diagnosis; retina;
retinopathy; diabetic retinopathy; age-related macular degeneration;
image analysis
ID DIABETIC-RETINOPATHY; MACULAR DEGENERATION; FUNDUS IMAGES; RETINAL
IMAGES; OPTIC DISC; VESSEL SEGMENTATION; NEURORETINAL RIM; PHOTOGRAPHS;
LESIONS; SYSTEM
AB Purpose: To describe a novel computer-based image analysis method that is being developed to assist and automate the diagnosis of retinal disease.
Methods: Content-based image retrieval is the process of retrieving related images from large database collections using their pictorial content. The content feature list becomes the index for storage, search, and retrieval of related images from a library based upon specific visual characteristics. Low-level analyses use feature description models and higher-level analyses use perceptual organization and spatial relationships, including clinical metadata, to extract semantic information.
Results: We defined, extracted, and tested a large number of region- and lesion-based features from a dataset of 395 retinal images. Using a statistical hold-one-out method, independent queries for each image were submitted to the system and a diagnostic prediction was formulated. The diagnostic sensitivity for all stratified levels of age-related macular degeneration ranged from 75% to 100%. Similarly, the sensitivity of detection and accuracy for proliferative diabetic retinopathy ranged from 75% to 91.7% and for nonproliferative diabetic retinopathy, ranged from 75% to 94.7%. The overall purity of the diagnosis (specificity) for all disease states in the dataset was 91.3%.
Conclusions: The probabilistic nature of content-based image retrieval permits us to make statistically relevant predictions regarding the presence, severity, and manifestations of common retinal diseases from digital images in an automated and deterministic manner.
C1 [Chaum, Edward] Univ Tennessee, Hlth Sci Ctr, Dept Ophthalmol, Memphis, TN USA.
[Chaum, Edward] Univ Tennessee, Hlth Sci Ctr, Dept Anat & Neurobiol, Memphis, TN USA.
[Chaum, Edward] Univ Tennessee, Hlth Sci Ctr, Dept Biomed Engn, Memphis, TN USA.
[Chaum, Edward] Univ Tennessee, Hlth Sci Ctr, Dept Pediat, Memphis, TN USA.
[Karnowski, Thomas P.; Govindasamy, V. Priya; Tobin, Kenneth W.] Oak Ridge Natl Lab, Image Sci & Machine Vis Grp, Oak Ridge, TN USA.
[Abdelrahman, Mohamed] Tennessee Technol Univ, Cookeville, TN 38505 USA.
RP Chaum, E (reprint author), Hamilton Eye Inst, 930 Madison Ave,Suite 731, Memphis, TN 38163 USA.
EM echaum@utmem.edu
FU Oak Ridge National Laboratory; National Eye Institute [EY017065]; United
States Army Medical and Material Command; Telemedicine and Advanced
Technology Research Center [W81XWH-05-1-0409]; Research to Prevent
Blindness, New York, NY; Fight for Sight, New York, NY; Plough
Foundation, Memphis, TN
FX These studies were supported in part by grants from Oak Ridge National
Laboratory, the National Eye Institute, (EY017065), the United States
Army Medical and Material Command, Telemedicine and Advanced Technology
Research Center (W81XWH-05-1-0409), by an unrestricted UTHSC
Departmental grant from Research to Prevent Blindness, New York, NY,
Fight for Sight, New York, NY, and by The Plough Foundation, Memphis,
TN.
NR 59
TC 35
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U1 0
U2 9
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0275-004X
EI 1539-2864
J9 RETINA-J RET VIT DIS
JI Retin.-J. Retin. Vitr. Dis.
PD NOV-DEC
PY 2008
VL 28
IS 10
BP 1463
EP 1477
DI 10.1097/IAE.0b013e31818356dd
PG 15
WC Ophthalmology
SC Ophthalmology
GA 373LH
UT WOS:000260972600013
PM 18997609
ER
PT J
AU Bailey, JE
Rochau, GA
Mancini, RC
Iglesias, CA
MacFarlane, JJ
Golovkin, IE
Pain, JC
Gilleron, F
Blancard, C
Cosse, P
Faussurier, G
Chandler, GA
Nash, TJ
Nielsen, DS
Lake, PW
AF Bailey, J. E.
Rochau, G. A.
Mancini, R. C.
Iglesias, C. A.
MacFarlane, J. J.
Golovkin, I. E.
Pain, J. C.
Gilleron, F.
Blancard, C.
Cosse, Ph.
Faussurier, G.
Chandler, G. A.
Nash, T. J.
Nielsen, D. S.
Lake, P. W.
TI Diagnosis of x-ray heated Mg/Fe opacity research plasmas
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
DE electron density; iron; magnesium; opacity; plasma diagnostics
ID ABSORPTION EXPERIMENTS; CONSTRAINED SAMPLES; Z PINCHES; IRON;
SPECTROSCOPY; TEMPERATURE; PROFILES; SPECTRUM; PHYSICS; RANGE
AB Understanding stellar interiors, inertial confinement fusion, and Z pinches depends on opacity models for mid-Z plasmas in the 100-300 eV temperature range. These models are complex and experimental validation is crucial. In this paper we describe the diagnosis of the first experiments to measure iron plasma opacity at a temperature high enough to produce the charge states and electron configurations that exist in the solar interior. The dynamic Hohlraum x-ray source at Sandia National Laboratories' Z facility was used to both heat and backlight Mg/Fe CH tamped foils. The backlighter equivalent brightness temperature was estimated to be T-r similar to 314 eV +/- 8% using time-resolved x-ray power and imaging diagnostics. This high brightness is significant because it overwhelms the sample self-emission. The sample transmission in the 7-15.5 A range was measured using two convex potassium acid phthalate crystal spectrometers that view the backlighter through the sample. The average spectral resolution over this range was estimated to be lambda/delta lambda similar to 700 by comparing theoretical crystal resolution calculations with measurements at 7.126, 8.340, and 12.254 A. The electron density was determined to be n(e)=6.9 +/- 1.7x10(21) cm(-3) using the Stark-broadened Mg He beta, He gamma, and He delta lines. The temperature inferred from the H-like to He-like Mg line ratios was T-e=156 +/- 6 eV. Comparisons with three different spectral synthesis models all have normalized chi(2) that is close to unity, indicating quantitative consistency in the inferred plasma conditions. This supports the reliability of the results and implies the experiments are suitable for testing iron opacity models.
C1 [Bailey, J. E.; Rochau, G. A.; Chandler, G. A.; Nash, T. J.; Nielsen, D. S.; Lake, P. W.] 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 53711 USA.
[Pain, J. C.; Gilleron, F.; Blancard, C.; Cosse, Ph.; Faussurier, G.] CEA, DIF, F-91297 Bruyeres Le Chatel, Arpajon, France.
RP Bailey, JE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
OI Pain, Jean-Christophe/0000-0002-7825-1315
FU U. S. Department of Energy [DE-AC04-94AL85000]; Department of Energy by
Lawrence Livermore National Laboratory [W-7405-ENGF-48]
FX We thank the Z dynamic Hohlraum, accelerator, diagnostics, materials
processing, target fabrication, and wire array teams for invaluable and
dedicated technical assistance. Special assistance was provided by L.
Nielsen-Weber and L. P. Mix. We are grateful to R. J. Leeper, T. A.
Mehlhorn, J. L. Porter, and M. K. Matzen for support and encouragement.
Sandia is a multiprogram laboratory operated by Sandia Corporation, a
Lockheed Martin Co., for the U. S. Department of Energy under Contract
No. DE-AC04-94AL85000. Work by CAI performed under the auspices of the
Department of Energy by Lawrence Livermore National Laboratory under
Contract No. W-7405-ENGF-48.
NR 51
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U1 1
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0034-6748
EI 1089-7623
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD NOV
PY 2008
VL 79
IS 11
AR 113104
DI 10.1063/1.3020710
PG 11
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 376WB
UT WOS:000261212600005
PM 19045886
ER
PT J
AU Raabe, J
Tzvetkov, G
Flechsig, U
Boge, M
Jaggi, A
Sarafimov, B
Vernooij, MGC
Huthwelker, T
Ade, H
Kilcoyne, D
Tyliszczak, T
Fink, RH
Quitmann, C
AF Raabe, J.
Tzvetkov, G.
Flechsig, U.
Boege, M.
Jaggi, A.
Sarafimov, B.
Vernooij, M. G. C.
Huthwelker, T.
Ade, H.
Kilcoyne, D.
Tyliszczak, T.
Fink, R. H.
Quitmann, C.
TI PolLux: A new facility for soft x-ray spectromicroscopy at the Swiss
Light Source
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
DE image resolution; light sources; X-ray apparatus; X-ray microscopy;
X-ray optics; X-ray spectroscopy; zone plates
ID MICROSCOPY; TRANSMISSION; BEAMLINE; MICROSPECTROSCOPY; SPECTROSCOPY;
MOLECULES; POLYMERS; SPECTRA; PHOTOABSORPTION; MICROBALLOONS
AB We report on the successful installation and operation of a scanning transmission x-ray microspectroscope (STXM) at the PolLux facility at the Swiss Light Source. This integration of an advanced STXM with improved sample handling capabilities and a novel beamline provides unique capabilities. PolLux uses linearly or circularly polarized x-rays from a bending magnet with an extended photon energy range (200-1400 eV). It is therefore well suited to determine a sample's quantitative chemical composition, molecular orientation, or thickness of organic as well as condensed matter materials. The local magnetic state of magnetic thin films is accessible through fast helicity switching by steering the electron beam off axis through the bending magnet. Ex vacuo girder movers allow fast and highly reproducible (< 1 mu m) alignment of the instrument with respect to the photon beam. The present spatial resolution is similar to 20 nm, limited by the zone plates utilized. The instrument has the stability and positional resolution to operate with much higher resolution optics as it becomes available. In addition to characterization experiments, we present several typical examples from materials research and environmental science to exemplify the capabilities.
C1 [Raabe, J.; Boege, M.; Jaggi, A.; Sarafimov, B.; Huthwelker, T.; Quitmann, C.] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland.
[Tzvetkov, G.; Fink, R. H.] Univ Erlangen Nurnberg, Phys Chem & ICMM 2, D-91058 Erlangen, Germany.
[Vernooij, M. G. C.] Eidgenoss Mat Prufungsanstalt EMPA, CH-8600 Dubendorf, Switzerland.
[Ade, H.] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA.
[Kilcoyne, D.; Tyliszczak, T.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Raabe, J (reprint author), Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland.
EM joerg.raabe@psi.ch
RI Quitmann, Christoph/A-7047-2008; Fink, Rainer/C-5333-2008; Fink,
Rainer/F-8365-2010; Ade, Harald/E-7471-2011; Kilcoyne,
David/I-1465-2013; Raabe, Joerg/C-4818-2012
OI Fink, Rainer/0000-0002-6896-4266; Fink, Rainer/0000-0002-6896-4266;
Raabe, Joerg/0000-0002-2071-6896
FU BMBF [05KS4WE1]; BaCaTec
FX We acknowledge financial support through the BMBF (Project No. 05KS4WE1)
and BaCaTec. We like to thank Dr. S. Sjoegren and Dr. E. Weingartner for
helpful discussion concerning the preparation and the thermodynamics of
ammonium sulfate and adipic acid mixtures. The assistance of Dr. M.
Ammann and M. Birrer in preparing the climate cell was gratefully
acknowledged. We also acknowledge the constructive interaction with Dr.
U. Wiesemann and W. Diete from ACCEL. The measurements have been
performed at the Swiss Light Source, Paul Scherrer Institut, Villigen,
Switzerland.
NR 51
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U1 5
U2 37
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 NOV
PY 2008
VL 79
IS 11
AR 113704
DI 10.1063/1.3021472
PG 10
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 376WB
UT WOS:000261212600011
PM 19045892
ER
PT J
AU Wiley, S
AF Wiley, Steven
TI Peer Review Isn't Perfect ...
SO SCIENTIST
LA English
DT Editorial Material
C1 Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Wiley, S (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
NR 0
TC 7
Z9 7
U1 2
U2 4
PU LABX MEDIA GROUP
PI MIDLAND
PA PO BOX 216, 478 BAY ST, MIDLAND, ONTARIO L4R 1K9, CANADA
SN 0890-3670
EI 1547-0806
J9 SCIENTIST
JI Scientist
PD NOV
PY 2008
VL 22
IS 11
BP 31
EP 31
PG 1
WC Information Science & Library Science; Multidisciplinary Sciences
SC Information Science & Library Science; Science & Technology - Other
Topics
GA 362ID
UT WOS:000260190500016
ER
PT J
AU Alsem, DH
Muhlstein, CL
Stach, EA
Ritchie, RO
AF Alsem, D. H.
Muhlstein, C. L.
Stach, E. A.
Ritchie, R. O.
TI Further considerations on the high-cycle fatigue of micron-scale
polycrystalline silicon
SO SCRIPTA MATERIALIA
LA English
DT Article
DE MEMS; Silicon; Fatigue; Reaction-layer fatigue
ID SINGLE-CRYSTAL SILICON; STRUCTURAL FILMS; POLYSILICON; PLASTICITY;
MECHANISMS; FRACTURE; FAILURE; STRESS
AB Bulk silicon is not susceptible to high-cycle fatigue but micron-scale silicon films are. Using polysilicon resonators to determine stress-lifetime fatigue behavior in several environments, oxide layers are found to show up to four-fold thickening after cycling, which is not seen after monotonic loading or after cycling in vacuo. We believe that the mechanism of thin-film silicon fatigue is "reaction-layer fatigue", involving cyclic stress-induced thickening of the oxide and moisture-assisted cracking within this layer. Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
C1 [Ritchie, R. O.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
[Alsem, D. H.; Ritchie, R. O.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Alsem, D. H.] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
[Muhlstein, C. L.] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA.
[Stach, E. A.] Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA.
RP Ritchie, RO (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
EM RORitchie@lbl.gov
RI Stach, Eric/D-8545-2011; Ritchie, Robert/A-8066-2008;
OI Stach, Eric/0000-0002-3366-2153; Ritchie, Robert/0000-0002-0501-6998;
Muhlstein, Christopher/0000-0002-5928-068X
FU US Department of Energy [DE-AC02-05CH11231]; The Pennsylvania State
University
FX This work was supported by the Director, Office of Science, Office of
Basic Energy Sciences, Division of Materials Sciences and Engineering,
of the US Department of Energy under Contract No. DE-AC02-05CH11231. The
authors would like to thank the staff and the use of equipment at the
National Center for Electron Microscopy, Lawrence Berkeley National
Laboratory, which is supported by the Department of Energy under this
contract. The generous support of The Pennsylvania State University (for
C.L.M.) is also acknowledged.
NR 29
TC 26
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U1 0
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 NOV
PY 2008
VL 59
IS 9
BP 931
EP 935
DI 10.1016/j.scriptamat.2008.03.043
PG 5
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 358QD
UT WOS:000259931700006
ER
PT J
AU Ye, J
Mishra, RK
Minor, AM
AF Ye, J.
Mishra, R. K.
Minor, A. M.
TI Relating nanoscale plasticity to bulk ductility in aluminum alloys
SO SCRIPTA MATERIALIA
LA English
DT Article
DE Transmission electron microscopy (TEM); Compression test; Aluminium
alloys; Ductility annealing
ID CRYSTAL PLASTICITY; SCALE
AB In situ transmission electron microscopy nanocompression tests of aluminum alloy pillars revealed higher yield stress and greater ductility post-annealing, analogous to what is seen in bulk testing. The annealed pillars showed a complex three-dimensional deformation behavior, whereas the as-extruded sample showed a simpler two-dimensional plasticity. This difference in behavior is consistent with the hypothesis that increasing the Cr content in solution results in stronger obstacles to dislocation motion, leading to a more three-dimensional plasticity at the nanoscale and an increase in bulk ductility. Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
C1 [Ye, J.; Minor, A. M.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
[Ye, J.; Minor, A. M.] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
[Mishra, R. K.] Gen Motors Res & Dev Ctr, Warren, MI USA.
RP Minor, AM (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, 1 Cyclotron Rd,MS 72, Berkeley, CA 94720 USA.
EM aminor@lbl.gov
FU Scientific User Facilities Division of the Office of Basic Energy
Sciences; US Department of Energy [DE-AC02-05CH11231]; General Motors
Research and Development Center
FX This research was supported by the Scientific User Facilities Division
of the Office of Basic Energy Sciences, US Department of Energy under
Contract No. DE-AC02-05CH11231 and the General Motors Research and
Development Center.
NR 14
TC 16
Z9 16
U1 1
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 NOV
PY 2008
VL 59
IS 9
BP 951
EP 954
DI 10.1016/j.scriptamat.2008.06.052
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 358QD
UT WOS:000259931700010
ER
PT J
AU Jiang, C
AF Jiang, Chao
TI First-principles study of Co-3(Al,W) alloys using special quasi-random
structures
SO SCRIPTA MATERIALIA
LA English
DT Article
DE Phase stability; Elastic behaviour; Intermetallic compounds;
First-principle electron theory
ID SPECIAL QUASIRANDOM STRUCTURES; ELECTRONIC-STRUCTURE; PHASE-STABILITY;
CO; APPROXIMATION
AB We have developed 32-atom special quasi-random structures (SQSs) to model the substitutionally random pseudo-binary A(3)(B0.5C0.5) alloys in L1(2), D0(19), and D0(3) crystal structures, respectively. First-principles SQS calculations are performed to examine the phase stability of the recently identified L1(2)-Co3Al0.5W0.5 compound in the Co-Al-W ternary system. By computing total energy as a function of applied strain, the single-crystal elastic constants of L1(2)-Co3Al0.5W0.5 are also predicted and our results show excellent agreement with recent experimental measurements. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 Los Alamos Natl Lab, Struct Property Relat Grp MST 8, Los Alamos, NM 87545 USA.
RP Jiang, C (reprint author), Los Alamos Natl Lab, Struct Property Relat Grp MST 8, POB 1663, Los Alamos, NM 87545 USA.
EM chao@lanl.gov
RI Jiang, Chao/A-2546-2011; Jiang, Chao/D-1957-2017
OI Jiang, Chao/0000-0003-0610-6327
FU Los Alamos National Laboratory (LANL)
FX The author acknowledges the support of the Director's postdoctoral
fellowship at Los Alamos National Laboratory (LANL). All calculations
were performed using the parallel computing facilities at LANL.
NR 25
TC 41
Z9 43
U1 4
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 NOV
PY 2008
VL 59
IS 10
BP 1075
EP 1078
DI 10.1016/j.scriptamat.2008.07.021
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 357ZL
UT WOS:000259885800013
ER
PT J
AU Schlagel, DL
Yuhasz, WM
Dennis, KW
McCallum, RW
Lograsso, TA
AF Schlagel, D. L.
Yuhasz, W. M.
Dennis, K. W.
McCallum, R. W.
Lograsso, T. A.
TI Temperature dependence of the field-induced phase transformation in
Ni50Mn37Sn13
SO SCRIPTA MATERIALIA
LA English
DT Article
DE Ni-Mn-Sn alloy; Heusler phase; Magnetic shape memory alloy; Martensitic
phase transformation; Field-induced
ID ALLOYS
AB Polycrystalline Ni50Mn37Sn13 alloy was fully homogenized such that the structural and magnetic transitions were clearly separated from each other in temperature. The sequence of transitions on cooling is: (1) austenite Curie point; (2) austenite to martensite structural and coupled ferromagnetic to paramagnetic transitions (first-order); and (3) martensite Curie point. Most notably, we found the field-induced transformation occurs from paramagnetic martensite to ferromagnetic austenite. The field-induced transition has a temperature dependence of -10 kOe K-1 over a narrow temperature range. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Schlagel, D. L.; Yuhasz, W. M.; Dennis, K. W.; McCallum, R. W.; Lograsso, T. A.] Iowa State Univ Sci & Technol, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA.
RP Schlagel, DL (reprint author), Iowa State Univ Sci & Technol, Ames Lab, Mat & Engn Phys Program, 111 Met Dev, Ames, IA 50011 USA.
EM schlagel@iastate.edu
RI Yuhasz, William/C-9418-2009
FU US Department of Energy [DE-AC02-07CH11358]
FX Work was performed at the Ames Laboratory with support from the US
Department of Energy Contract No. DE-AC02-07CH11358.
NR 9
TC 24
Z9 24
U1 3
U2 18
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 NOV
PY 2008
VL 59
IS 10
BP 1083
EP 1086
DI 10.1016/j.scriptamat.2008.07.039
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 357ZL
UT WOS:000259885800015
ER
PT J
AU Shim, S
Bei, H
George, EP
Pharr, GM
AF Shim, S.
Bei, H.
George, E. P.
Pharr, G. M.
TI A different type of indentation size effect
SO SCRIPTA MATERIALIA
LA English
DT Article
DE Nanoindentation; Nickel; Yield phenomena; Elastic behavior; Pop-in
ID STRAIN GRADIENT PLASTICITY; INCIPIENT PLASTICITY; MECHANICAL-PROPERTIES;
YIELD-POINT; THIN-FILMS; NANOINDENTATION; NUCLEATION; DEFORMATION;
CRYSTALS; ALLOY
AB Pop-in during nanoindentation, which indicates the onset of dislocation plasticity, was systematically investigated in annealed and pre-strained single crystals of nickel using spherical indenters with different tip radii. As the indenter radius and pre-strain decrease, the maximum shear stresses determined from the pop-in loads increase. This represents a new type of indentation size effect (ISE), based not on the measured hardness as in conventional ISE, but on the stress needed to initiate dislocation plasticity. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Shim, S.; Bei, H.; George, E. P.; Pharr, G. M.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
[Shim, S.; George, E. P.; Pharr, G. M.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
RP Shim, S (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
EM Shims@ornl.gov; Beih@ornl.gov
RI George, Easo/L-5434-2014;
OI Bei, Hongbin/0000-0003-0283-7990
FU US Department of Energy
FX This research was sponsored by the US Department of Energy: the
Assistant Secretary for Energy Efficiency and Renewable Energy, Office
of FreedomCAR and Vehicle Technologies, as part of the High Temperature
Materials Laboratory User Program (S.S.); Division of Materials Sciences
and Engineering (H.B. and E.P.G.); and the SHaRE User Facility, Division
of Scientific User Facilities (G.M.P.).
NR 24
TC 105
Z9 107
U1 6
U2 59
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 NOV
PY 2008
VL 59
IS 10
BP 1095
EP 1098
DI 10.1016/j.scriptamat.2008.07.026
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 357ZL
UT WOS:000259885800018
ER
PT J
AU Hu, ZW
De Carlo, F
AF Hu, Z. W.
De Carlo, F.
TI Noninvasive three-dimensional visualization of defects and crack
propagation in layered foam structures by phase-contrast microimaging
SO SCRIPTA MATERIALIA
LA English
DT Article
DE Layered structures; Interface defects; Foams; Stress-rupture; Imaging
ID X-RAYS; MICROTOMOGRAPHY; TOMOGRAPHY
AB Layered polymer foam structures used to insulate the fuel tank on the Space Shuttle were investigated by combining phase-contrast X-ray three-dimensional imaging and loading. It is shown that the interlayers between layers were distinctly different from the layers, resulting in incoherent interfaces where defects developed due to severe mismatch of cell structure between the mechanically weaker layers and stronger interlayers. These images reveal noninvasively that cracks nucleated readily at the interfaces and grew preferably along the direction of foam rise. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Hu, Z. W.] NASA, George C Marshall Space Flight Ctr, BAE Syst, Huntsville, AL 35812 USA.
[De Carlo, F.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Hu, ZW (reprint author), NASA, George C Marshall Space Flight Ctr, BAE Syst, Huntsville, AL 35812 USA.
EM zhengwei.hu-l@nasa.gov
FU NASA/Marshall Space Flight Center; U.S. Department of Energy, Office of
Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
FX Z.W.H. thank Mr. B. Tiemen and Ms. P. Fernandez for help with data
processing and cryogenic testing, respectively. Mr. M. Suits, Mr. J.
Walker and Ms. B. Cook are thanked for their support and encouragement.
The work was supported by the Advanced Materials for Exploration Element
and the Biotechnology Science Program at NASA/Marshall Space Flight
Center. 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.
NR 22
TC 2
Z9 2
U1 1
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 NOV
PY 2008
VL 59
IS 10
BP 1127
EP 1130
DI 10.1016/j.scriptamat.2008.07.043
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 357ZL
UT WOS:000259885800026
ER
PT J
AU Zhou, SH
Napolitano, RE
AF Zhou, S. H.
Napolitano, R. E.
TI Identification of the B33 martensite phase in Cu-Zr using
first-principles and X-ray diffraction
SO SCRIPTA MATERIALIA
LA English
DT Article
DE Martensitic phase transformation; Thermodynamics; Intermetallics phases;
X-ray diffraction (XRD)
ID AUGMENTED-WAVE METHOD; MECHANICAL-PROPERTIES; INTERMETALLIC COMPOUND;
THERMAL-STABILITY; GLASS-FORMATION; ALLOY; MICROSTRUCTURE;
TRANSFORMATION; SYSTEM; COPPER
AB X-ray diffraction (XRD) experiments and first-principles calculations were employed to investigate the martensitic transformation products formed upon rapid cooling of the CuZr-B2 phase. Candidate intermetallic compound structures were selected, and calculations show that CuZr-B11 (CuTi prototype), CuZr-B27 (FeB), CuZr-B19' (NiTi) and CuZr-B33 (BCr) are more stable than the B2 phase at 0 K. Computed XRD patterns, based on first-principles calculations, were compared with experimental XRD measurements. The results indicate that the CuZr martensite consists of the CuZr-B33 and CuZr-B19' phases. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Napolitano, R. E.] Iowa State Univ Sci & Technol, Dept Mat Sci & Engn, Ames, IA 50011 USA.
[Zhou, S. H.; Napolitano, R. E.] Ames Lab, Usdoe, IA USA.
RP Napolitano, RE (reprint author), Iowa State Univ Sci & Technol, Dept Mat Sci & Engn, 2220 Hoover Hall, Ames, IA 50011 USA.
EM ralphn@iastate.edu
FU Department of Energy-Basic Energy Sciences [DE-AC02-07CH11358]
FX This work was performed within the Ames Laboratory and was supported by
the Department of Energy-Basic Energy Sciences, under Contract No.
DE-AC02-07CH11358.
NR 28
TC 15
Z9 15
U1 0
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 NOV
PY 2008
VL 59
IS 10
BP 1143
EP 1146
DI 10.1016/j.scriptamat.2008.07.040
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 357ZL
UT WOS:000259885800030
ER
PT J
AU Winkler, R
Culcer, D
Papadakis, SJ
Habib, B
Shayegan, M
AF Winkler, R.
Culcer, Dimitrie
Papadakis, S. J.
Habib, B.
Shayegan, M.
TI Spin orientation of holes in quantum wells
SO SEMICONDUCTOR SCIENCE AND TECHNOLOGY
LA English
DT Article
ID ELECTRON G-FACTOR; TWO-DIMENSIONAL ELECTRONS; 2-DIMENSIONAL ELECTRON;
RELAXATION ANISOTROPY; MAGNETIC-FIELD; VALENCE BANDS; SEMICONDUCTORS;
SYSTEMS; GAAS; HETEROSTRUCTURES
AB This paper reviews the spin orientation of spin-3/2 holes in quantum wells. We discuss the Zeeman and Rashba spin splitting in hole systems that are qualitatively different from their counterparts in electron systems. We show how a systematic understanding of the unusual spin-dependent phenomena in hole systems can be gained using a multipole expansion of the spin density matrix. As an example we discuss spin precession in hole systems that can give rise to an alternating spin polarization. Finally, we discuss the qualitatively different regimes of hole spin polarization decay in clean and dirty samples.
C1 [Winkler, R.; Culcer, Dimitrie] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Winkler, R.; Culcer, Dimitrie] No Illinois Univ, De Kalb, IL 60115 USA.
[Papadakis, S. J.; Habib, B.; Shayegan, M.] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA.
RP Winkler, R (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Schaff, William/B-5839-2009
FU DOE; ARO; NSF; Alexander von Humboldt Foundation; US Department of
Energy; Office of Science; Office of Basic Energy Sciences
[DE-AC02-06CH11357.]
FX The authors appreciate stimulating discussions with C Lechner, E P De
Poortere and E Tutuc. Also, we are grateful to D Wasserman and S A Lyon
for growing the wafers for our experiments. We thank the DOE, ARO, NSF
and the Alexander von Humboldt Foundation for support. The research at
Argonne National Laboratory was supported by the US Department of
Energy, Office of Science, Office of Basic Energy Sciences, under
contract no DE-AC02-06CH11357.
NR 74
TC 22
Z9 22
U1 0
U2 11
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0268-1242
EI 1361-6641
J9 SEMICOND SCI TECH
JI Semicond. Sci. Technol.
PD NOV
PY 2008
VL 23
IS 11
AR 114017
DI 10.1088/0268-1242/23/11/114017
PG 13
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Physics, Condensed Matter
SC Engineering; Materials Science; Physics
GA 366PO
UT WOS:000260495100019
ER
PT J
AU Maye, MM
Freumuth, P
Gang, O
AF Maye, Mathew M.
Freumuth, Paul
Gang, Oleg
TI Adenovirus Knob Trimers as Tailorable Scaffolds for Nanoscale Assembly
SO SMALL
LA English
DT Article
DE biomimetics; nanoparticles; proteins; scaffolds; self-assembly
ID FUNCTIONALIZED GOLD NANOPARTICLES; COWPEA MOSAIC-VIRUS; QUANTUM DOTS;
PEPTIDE; AGGREGATION; FABRICATION; TEMPLATES; NANOWIRES; PROTEINS;
SURFACE
C1 [Freumuth, Paul] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
[Maye, Mathew M.; Gang, Oleg] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
RP Freumuth, P (reprint author), Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
EM freimuth@bnt.gov; ogang@bnt.gov
FU US DOE [DE-AC-02-98CH10866]
FX Research carried out at the Center for Functional Nanomaterials at
Brookhaven National Laboratory is supported by the US DOE under contract
no. DE-AC-02-98CH10866. M. M. M. acknowledges a Goldhaber Distinguished
Fellowship at BNL sponsored by Brookhaven Science Associates.
NR 50
TC 3
Z9 3
U1 0
U2 4
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1613-6810
J9 SMALL
JI Small
PD NOV
PY 2008
VL 4
IS 11
BP 1941
EP 1944
DI 10.1002/smll.200800177
PG 4
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 377CX
UT WOS:000261230400012
PM 18932187
ER
PT J
AU Peng, H
Jain, M
Peterson, DE
Zhu, Y
Jia, Q
AF Peng, Huisheng
Jain, Menka
Peterson, Dean E.
Zhu, Yuntian
Jia, Quanxi
TI Composite Carbon Nanotube/Silica Fibers with Improved Mechanical
Strengths and Electrical Conductivities
SO SMALL
LA English
DT Article
DE carbon nanotubes; composite fibers; hydrogen bonding; silica
ID GROWTH; ARRAYS; POLYMERIZATION; FABRICATION; FILMS
C1 [Peng, Huisheng] Fudan Univ, Adv Mat Lab, Shanghai 200433, Peoples R China.
[Peng, Huisheng] Fudan Univ, Dept Macromol Sci, Shanghai 200433, Peoples R China.
[Peng, Huisheng; Jain, Menka; Peterson, Dean E.; Jia, Quanxi] Los Alamos Natl Lab, Div Mat Phys & Applicat, Los Alamos, NM 87545 USA.
[Zhu, Yuntian] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA.
RP Peng, H (reprint author), Fudan Univ, Adv Mat Lab, Shanghai 200433, Peoples R China.
EM penghs2004@yahoo.com; ytzhu@ncsu.edu; qxjia@lanl.gov
RI Zhu, Yuntian/B-3021-2008; Jia, Q. X./C-5194-2008; Peng,
Huisheng/G-8867-2011;
OI Zhu, Yuntian/0000-0002-5961-7422; Jain, Menka/0000-0002-2264-6895
FU U.S. Department of Energy
FX We gratefully acknowledge the support of the U.S. Department of Energy
through the LANL/LDRD program for this work.
NR 25
TC 46
Z9 46
U1 3
U2 35
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 1613-6810
J9 SMALL
JI Small
PD NOV
PY 2008
VL 4
IS 11
BP 1964
EP 1967
DI 10.1002/smll.200800231
PG 4
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 377CX
UT WOS:000261230400017
PM 18949795
ER
PT J
AU Sumpter, BG
Jiang, DE
Meunier, V
AF Sumpter, Bobby G.
Jiang, De-En
Meunier, Vincent
TI New Insight into Carbon-Nanotube Electronic-Structure Selectivity
SO SMALL
LA English
DT Article
DE carbon nanotubes; conducting materials; diazonium salts;
electronic-structure selectivity
ID CORRELATED MOLECULAR CALCULATIONS; TOTAL-ENERGY CALCULATIONS;
AUGMENTED-WAVE METHOD; GAUSSIAN-BASIS SETS; DIAZONIUM SALTS;
TRANSPORT-PROPERTIES; ORBITAL METHODS; SEPARATION; FUNCTIONALIZATION;
HYDROGEN
AB The fundamental role of aryl diazonium salts for post-synthesis selectivity of carbon nanotubes is investigated using extensive electronic-structure calculations. The resulting understanding for diaz onium-salt-based selective separation of conducting and semiconducting carbon nanotubes shows how the primary contribution comes from the interplay between the intrinsic electronic structure of the carbon nanotubes and that of the anion of the salt. We demonstrate how the electronic-transport properties change upon the formation of charge transfer complexes and upon their conversion into covalently attached functional groups. The results are found to correlate well with experiments and provide for the first time an atomistic description for diazonium-salt-based chemical separation of carbon nanotubes.
C1 [Sumpter, Bobby G.; Jiang, De-En] Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA.
[Sumpter, Bobby G.; Jiang, De-En] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
[Jiang, De-En; Meunier, Vincent] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Sumpter, BG (reprint author), Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA.
EM sumpterbg@ornl.gov
RI Jiang, De-en/D-9529-2011; Meunier, Vincent/F-9391-2010; Sumpter,
Bobby/C-9459-2013
OI Jiang, De-en/0000-0001-5167-0731; Meunier, Vincent/0000-0002-7013-179X;
Sumpter, Bobby/0000-0001-6341-0355
FU Division of Materials Science and Engineering, Office of Basic Energy
Sciences, U.S. Department of Energy; Center for Nonophose Materials
Sciences (CNMS); Division of Scientific User Facilities, U.S. Department
of Energy
FX This work was supported by the Division of Materials Science and
Engineering, Office of Basic Energy Sciences, U.S. Department of Energy
and by the Center for Nonophose Materials Sciences (CNMS), sponsored by
the Division of Scientific User Facilities, U.S. Department of Energy.
The extensive computational work was performed using the resources of
the National Center for Computational Science (NCCS) at ORNL.
NR 64
TC 16
Z9 16
U1 0
U2 14
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 1613-6810
J9 SMALL
JI Small
PD NOV
PY 2008
VL 4
IS 11
BP 2035
EP 2042
DI 10.1002/smll.200800298
PG 8
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 377CX
UT WOS:000261230400027
PM 18924129
ER
PT J
AU Johnson, DW
Todd, DE
Trettin, CF
Mulholland, PJ
AF Johnson, D. W.
Todd, D. E., Jr.
Trettin, C. F.
Mulholland, P. J.
TI Decadal Changes in Potassium, Calcium, and Magnesium in a Deciduous
Forest Soil
SO SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
LA English
DT Article
ID MIXED OAK FOREST; ALLEGHENY PLATEAU; NUTRIENT; NITROGEN; PENNSYLVANIA;
ECOSYSTEMS; TENNESSEE; BUDGETS; CARBON; PERIOD
AB Decadal changes in soil exchangeable K+, Ca2+, and Mg2+ concentrations and contents from 1972 to 2004 in eight intensively monitored plots on Walker Branch Watershed were compared with estimates of increments or decrements in vegetation and detritus. The results from these eight plots compared favorably with those from a more extensive set from 24 soil sampling plots sampled in 1972 and 2004. Increases in exchangeable K+ were noted between 1972 and 1982, but few changes were noted between 1982 and 2004 despite significant increments in vegetation and detritus and significant potential losses by leaching. Total K contents of soils in the 0- to 60-cm sampling depth were very large and a slight amount of weathering could have replenished the K+ lost from exchanges sites. With one notable exception, exchangeable Ca2+ and Mg2+ concentrations and contents decreased continuously during the sampling period. Decreases in exchangeable Ca2+ could be attributed mostly to increments in biomass and detritus, whereas decreases in exchangeable Mg2+ could not and were attributed to leaching. The major exception to these patterns was in the case of exchangeable Ca2+, where significant increases were noted in one plot and attributed to Ca release from the decomposition of Ca-rich coarse woody debris from oak (Quercus spp.) mortality. With minor exceptions, soils and changes in soils among the eight intensively sampled core plots were similar to those in a more extensive set of plots distributed across the watershed. This study shows that averaging among plots can mask significant and important spatial patterns in soil change that must be taken into account in assessing long-term trends.
C1 [Johnson, D. W.] Univ Nevada, Dep Nat Resource & Environ Sci, Reno, NV 89557 USA.
[Todd, D. E., Jr.; Mulholland, P. J.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Trettin, C. F.] US Forest Serv, Charleston, SC 29414 USA.
RP Johnson, DW (reprint author), Univ Nevada, Dep Nat Resource & Environ Sci, Ieischmann Agr Bldg 370, Reno, NV 89557 USA.
EM dwj@cabnr.unr.edu
RI Mulholland, Patrick/C-3142-2012
NR 26
TC 16
Z9 16
U1 1
U2 8
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 NOV-DEC
PY 2008
VL 72
IS 6
BP 1795
EP 1805
DI 10.2136/sssaj2007.0229
PG 11
WC Soil Science
SC Agriculture
GA 373KQ
UT WOS:000260970900036
ER
PT J
AU Romanyuk, YE
Yu, KM
Walukiewicz, W
Lavrynyuk, ZV
Pekhnyo, VI
Parasyuk, OV
AF Romanyuk, Y. E.
Yu, K. M.
Walukiewicz, W.
Lavrynyuk, Z. V.
Pekhnyo, V. I.
Parasyuk, O. V.
TI Single crystal growth and properties of gamma-phase in the CuInSe2+2CdS
double left right arrow CuInS2+2CdSe reciprocal system
SO SOLAR ENERGY MATERIALS AND SOLAR CELLS
LA English
DT Article
DE CuInSe2; crystal growth; solid solution
ID THIN-FILM; ELECTRICAL-PROPERTIES; SOLAR-CELLS; CDS; HETEROJUNCTION;
INTERFACES; TRANSPORT; DIAGRAM
AB The intermediate solid solution, gamma-phase, exists in the CuInSe2+2CdS double left right arrow CuInS2+2CdSe reciprocal system. It crystallizes in the cubic structure and has a wide homogeneity range. Single crystals of the gamma-phase are grown by a modified Bridgman method and their composition, crystal structure, optical and electrical properties are studied. The band gap varies from 1.43 to 1.05 eV along the 'Cu3Cd2In3S8'-'CuCd2InSe4' compositional section. The crystals are photosensitive, mostly p-type, with hole concentrations in the 10(15)-10(16) cm(-3) range and mobilities Up to 18 cm(2)/Vs. The results indicate that the gamma-phase can be considered as a new absorbing material for thin-film solar cells. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Romanyuk, Y. E.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Yu, K. M.; Walukiewicz, W.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Lavrynyuk, Z. V.; Parasyuk, O. V.] Volyn State Univ, Dept Gen & Inorgan Chem, Lutsk, Ukraine.
[Pekhnyo, V. I.] VI Vernadskii Inst Gen & Inorgan Chem, Kiev, Ukraine.
RP Romanyuk, YE (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM yaromanyuk@lbl.gov
RI Yu, Kin Man/J-1399-2012
OI Yu, Kin Man/0000-0003-1350-9642
FU Science and Technology Centre of Ukraine (STCU) [4120]; US Department of
Energy [DE-AC02-05CH11231]
FX This work was supported by the Science and Technology Centre of Ukraine
(STCU), Project no. 4120. Optical and electrical measurements were
supported by the Director, Office of Science, Office of Basic Energy
Sciences, of the US Department of Energy under Contract no.
DE-AC02-05CH11231.
NR 23
TC 14
Z9 14
U1 0
U2 7
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 NOV
PY 2008
VL 92
IS 11
BP 1495
EP 1499
DI 10.1016/j.solmat.2008.06.014
PG 5
WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied
SC Energy & Fuels; Materials Science; Physics
GA 355DB
UT WOS:000259688100031
ER
PT J
AU Page, K
Li, J
Savinelli, R
Szumila, HN
Zhang, JP
Stalick, JK
Proffen, T
Scott, SL
Seshadri, R
AF Page, Katharine
Li, Jun
Savinelli, Robert
Szumila, Holly N.
Zhang, Jinping
Stalick, Judith K.
Proffen, Thomas
Scott, Susannah L.
Seshadri, Ram
TI Reciprocal-space and real-space neutron investigation of nanostructured
Mo(2)C and WC
SO SOLID STATE SCIENCES
LA English
DT Article
DE Metal carbides; Nanostructures; Pair-distribution function method;
Neutron diffraction
ID METAL HEMICARBIDES M2C1-X; POWDER DIFFRACTION; AMMONIUM PARATUNGSTATE;
MOLYBDENUM CARBIDE; TUNGSTEN CARBIDE; TEMPERATURE; RESOLUTION
AB As possible substitute materials for platinum group metal heterogeneous catalysts, high surface area carbides of the early transition metals Mo and W are of great interest. Here we report nanostructured, high surface area Mo(2)C and WC prepared by decomposing and carburizing ammonium paramolybdate [(NH(4))(6)Mo(7)O(24)center dot 4H(2)O] and ammonium paratungstate [(NH(4))(10)W(12)O(41)center dot 5H(2)O] in flowing 50%CH(4)/50%H(2). Surface areas as high as 52 m(2)/g for Mo(2)C and 24 m(2)/g for WC were obtained, with both structures crystallizing in structures appropriate for catalytic activity. We have studied these materials using a combination of neutron diffraction Rietveld refinement, X-ray photoelectron spectroscopy, surface area measurements, and scanning transmission electron microscopy. In addition, we have used pair-distribution function (PDF) analysis of the neutron total scattering data as a means of establishing the presence of graphitic carbon in the as-prepared materials. (c) 2008 Elsevier Masson SAS. All rights reserved.
C1 [Savinelli, Robert; Scott, Susannah L.] Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA.
[Page, Katharine; Li, Jun; Szumila, Holly N.; Zhang, Jinping; Seshadri, Ram] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA.
[Page, Katharine; Li, Jun; Szumila, Holly N.; Zhang, Jinping; Seshadri, Ram] Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA.
[Scott, Susannah L.; Seshadri, Ram] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA.
[Stalick, Judith K.] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
[Proffen, Thomas] Los Alamos Natl Lab, Manuel Lujan Jr Neutron Scattering Ctr, LANSCE LC, Los Alamos, NM 87545 USA.
RP Scott, SL (reprint author), Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA.
EM sscott@engineering.ucsb.edu; seshadri@mrl.ucsb.edu
RI Page, Katharine/C-9726-2009; Lujan Center, LANL/G-4896-2012; Seshadri,
Ram/C-4205-2013; Proffen, Thomas/B-3585-2009
OI Page, Katharine/0000-0002-9071-3383; Seshadri, Ram/0000-0001-5858-4027;
Proffen, Thomas/0000-0002-1408-6031
FU Department of Energy, (DOE) Office of Basic Energy Sciences (BES)
[FG02-05ER15025]; National Science Foundation; NSF [DMR05-20415];
National Institute of Standards and Technology, U.S. Department of
Commerce; Department of Energy, Office of Basic Energy Sciences;
National Science Foundation [DMR00-76488]
FX This work has been supported by the Department of Energy, (DOE) Office
of Basic Energy Sciences (BES) through grant DE-FG02-05ER15025. KP and
HNS were supported by the National Science Foundation through a Graduate
Research Fellowship and through an Undergraduate Internship (RISE
Program), respectively. The work at UCSB made use of facilities of the
Materials Research Laboratory, supported by the NSF (DMR05-20415). We
acknowledge the support of the National Institute of Standards and
Technology, U.S. Department of Commerce, in providing the neutron
research facilities. This work benefited from the use of the Lujan
Center at Los Alamos Neutron Science Center, funded by the Department of
Energy, Office of Basic Energy Sciences. The upgrade of NPDF was funded
by the National Science Foundation through grant DMR00-76488.
NR 32
TC 23
Z9 23
U1 1
U2 19
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1293-2558
J9 SOLID STATE SCI
JI Solid State Sci.
PD NOV
PY 2008
VL 10
IS 11
BP 1499
EP 1510
DI 10.1016/j.solidstatesciences.2008.03.018
PG 12
WC Chemistry, Inorganic & Nuclear; Chemistry, Physical; Physics, Condensed
Matter
SC Chemistry; Physics
GA 378XN
UT WOS:000261358300005
ER
PT J
AU Rice, AE
Carne, TG
Kelton, DW
AF Rice, Amy E.
Carne, Thomas G.
Kelton, David W.
TI Model Validation of a Complex Aerospace Structure
SO SOUND AND VIBRATION
LA English
DT Article
AB A series of modal tests were performed to validate a finite-element model of a complex aerospace structure. Data were measured using various excitation methods to extract clean modes and damping values for a lightly damped system. Model validation was performed for one subassembly as well as for the full assembly to pinpoint the areas of the model that required updating and to better ascertain the quality of the joint models connecting the various components and subassemblies. After model updates were completed using the measured modal data, the model was validated using frequency response functions (FRFs) as the independent validation metric. Test and model FRFs were compared to determine the validity of the finite-element model.
C1 [Rice, Amy E.; Carne, Thomas G.; Kelton, David W.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Rice, AE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM aerice@sandia.gov
NR 5
TC 1
Z9 1
U1 0
U2 1
PU ACOUSTICAL PUBL INC
PI BAY VILLAGE
PA 27101 E OVIATT RD, PO BOX 40416, BAY VILLAGE, OH 44140 USA
SN 1541-0161
J9 SOUND VIB
JI Sound Vib.
PD NOV
PY 2008
VL 42
IS 11
BP 10
EP 15
PG 6
WC Acoustics; Engineering, Mechanical; Mechanics
SC Acoustics; Engineering; Mechanics
GA 382QW
UT WOS:000261621500003
ER
PT J
AU Hanisch, J
Mueller, FM
Ashworth, S
Coulter, JY
Matias, V
AF Haenisch, J.
Mueller, F. M.
Ashworth, S.
Coulter, J. Y.
Matias, V.
TI Measurement of the transverse J(c) profiles of coated conductors using a
magnetic knife of permanent magnets
SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY
LA English
DT Article
ID TEMPERATURE SUPERCONDUCTING TAPES; CRITICAL-CURRENT DENSITY; HIGH
CRITICAL CURRENTS; THIN-FILMS; SCALE-UP; PROGRESS
AB The transverse J(c) distribution in YBCO coated conductors was measured non-destructively with high resolution using a 'magnetic knife' made of permanent magnets. The method utilizes the strong depression of Jc in applied magnetic fields. A narrow region of low (including zero) magnetic field, in a surrounding higher field, is moved transversely across the sample in order to reveal the critical-current density distribution. The net resolution of this device is approximately 65 mu m, and the Jc resolution is better than 0.5%. A Fourier series inversion process was used to determine the transverse Jc distribution in the sample. The Jc profile was correlated with other sample properties of coated conductors prepared by pulsed laser deposition. Because of its straightforward and inexpensive design, this J(c) imaging technique can be a powerful tool for quality control in coated-conductor production.
C1 [Haenisch, J.; Mueller, F. M.; Ashworth, S.; Coulter, J. Y.; Matias, V.] Los Alamos Natl Lab, Superconduct Technol Ctr, Los Alamos, NM 87545 USA.
RP Hanisch, J (reprint author), Los Alamos Natl Lab, Superconduct Technol Ctr, POB 1663, Los Alamos, NM 87545 USA.
RI Hanisch, Jens/D-8503-2011
NR 19
TC 6
Z9 6
U1 0
U2 4
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 NOV
PY 2008
VL 21
IS 11
AR 115021
DI 10.1088/0953-2048/21/11/115021
PG 4
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA 355HI
UT WOS:000259699600022
ER
PT J
AU Donnet, C
Erdemir, A
AF Donnet, C.
Erdemir, A.
TI New horizon in the tribology of diamondlike carbon films
SO SURFACE ENGINEERING
LA English
DT Editorial Material
C1 [Donnet, C.] Univ St Etienne, Univ Inst France, St Etienne, France.
[Erdemir, A.] Argonne Natl Lab, Div Energy Syst, Argonne, IL 60439 USA.
RP Donnet, C (reprint author), Univ St Etienne, Univ Inst France, St Etienne, France.
EM christophe.donnet@univ-st-etienne.fr
NR 4
TC 7
Z9 8
U1 2
U2 8
PU MANEY PUBLISHING
PI LEEDS
PA STE 1C, JOSEPHS WELL, HANOVER WALK, LEEDS LS3 1AB, W YORKS, ENGLAND
SN 0267-0844
J9 SURF ENG
JI Surf. Eng.
PD NOV
PY 2008
VL 24
IS 6
BP 399
EP 401
DI 10.1179/174329408X365666
PG 3
WC Materials Science, Coatings & Films
SC Materials Science
GA 367XN
UT WOS:000260586000001
ER
PT J
AU Ma, SG
Rodriguez, J
Hrbek, J
AF Ma, Shuguo
Rodriguez, Jose
Hrbek, Jan
TI STM study of the growth of cerium oxide nanoparticles on Au(111)
SO SURFACE SCIENCE
LA English
DT Article
DE Cerium oxide; Gold; Growth; Scanning tunneling microscopy; Sintering
ID WATER-GAS SHIFT; INVERSE MODEL CATALYST; SCANNING-TUNNELING-MICROSCOPY;
METAL-SUPPORT INTERACTIONS; LAYER-ASSISTED DEPOSITION;
PHOTOEMISSION-SPECTROSCOPY; THERMAL-PROPERTIES; SURFACE; CO; FILMS
AB The morphology and structure of nanosized ceria particles prepared by several in vacuo deposition methods on a Au(111) template were investigated by scanning tunneling microscopy. Cerium metal nanoparticles on gold have limited reactivity toward molecular oxygen and NO(2), due to the formation of Ce-Au alloys, and their oxidation leads to formation of non-uniform substoichiometric three-dimensional (3D) oxide particles. Cerium metal deposition onto condensed multilayers of water or NO(2) generates fully oxidized but poorly ordered ceria particles after annealing. Ultra-thin flat and ordered ceria nanoislands were prepared by deposition of cerium metal on the gold surface at elevated temperatures under an oxygen background pressure. Atomically resolved images show an oxygen-terminated surface of CeO(2)(111) with oxygen vacancies. Published by Elsevier B.V.
C1 [Ma, Shuguo; Rodriguez, Jose; Hrbek, Jan] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
RP Hrbek, J (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
EM hrbek@bnl.gov
RI Hrbek, Jan/I-1020-2013
FU US Department of Energy [DE-AC02-98CH10886]
FX This research was carried out at Brookhaven National Laboratory and
supported by the US Department of Energy (Chemical Sciences Division,
DE-AC02-98CH10886).
NR 40
TC 40
Z9 40
U1 3
U2 46
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-6028
J9 SURF SCI
JI Surf. Sci.
PD NOV 1
PY 2008
VL 602
IS 21
BP 3272
EP 3278
DI 10.1016/j.susc.2008.08.021
PG 7
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 377JF
UT WOS:000261246800008
ER
PT J
AU Ferrin, P
Nilekar, AU
Greeley, J
Mavrikakis, M
Rossmeisl, J
AF Ferrin, Peter
Nilekar, Anand Udaykumar
Greeley, Jeff
Mavrikakis, Manos
Rossmeisl, Jan
TI Reactivity descriptors for direct methanol fuel cell anode catalysts
SO SURFACE SCIENCE
LA English
DT Article
DE Methanol; Transition metals; DFT; Electrocatalysis
ID GAS SHIFT REACTION; DENSITY-FUNCTIONAL THEORY; RU ALLOY SURFACES; OXYGEN
REDUCTION; HYDROGEN EVOLUTION; TRANSITION-METALS; DIRECT OXIDATION;
WATER; ELECTROOXIDATION; PT(111)
AB We have investigated the anode reaction in direct methanol fuel cells using a database of adsorption free energies for 16 intermediates on 12 close-packed transition metal surfaces calculated with periodic, self-consistent, density functional theory (DFT-GGA). This database, combined with a simple electrokinetic model of the methanol electrooxidation reaction, yields mechanistic insights that are consistent with previous experimental and theoretical studies on Pt, and extends these insights to a broad spectrum of other transition metals. In addition, by using linear scaling relations between the adsorption free energies of various intermediates in the reaction network, we find that the results determined with the full database of adsorption energies can be estimated by knowing only two key descriptors for each metal surface: the free energies of OH and CO on the surface. Two mechanisms for methanol oxidation to CO(2) are investigated: an indirect mechanism that goes through a CO intermediate and a direct mechanism where methanol is oxidized to CO(2) without the formation of a CO intermediate. For the direct mechanism, we find that, because of CO poisoning, only a small current will result on all non-group 11 transition metals; of these metals, Pt is predicted to be the most active, For methanol decomposition via the indirect mechanism, we find that the onset potential is limited either by the ability to activate methanol, by the ability to activate water, or by surface poisoning by CO(center dot) or OH(center dot)/O(center dot). Among pure metals, there is no obvious candidate for a good anode catalyst, and in order to design a better catalyst, one has to look for bi-functional surfaces such as the well-studied PtRu alloy. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Ferrin, Peter; Nilekar, Anand Udaykumar; Mavrikakis, Manos; Rossmeisl, Jan] Univ Wisconsin, Dept Chem & Biol Engn, Madison, WI 53706 USA.
[Greeley, Jeff] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
[Rossmeisl, Jan] Tech Univ Denmark, Dept Phys Nano DTU, Ctr Atom Scale Mat Design, DK-2800 Lyngby, Denmark.
RP Rossmeisl, J (reprint author), Univ Wisconsin, Dept Chem & Biol Engn, 1415 Engn Dr, Madison, WI 53706 USA.
EM jross@fysik.dtu.dk
RI Rossmeisl, Jan/A-5714-2011; Mavrikakis, Manos/D-5702-2012
OI Rossmeisl, Jan/0000-0001-7749-6567; Mavrikakis,
Manos/0000-0002-5293-5356
FU Department of Energy; Office of Basic Energy Sciences [DE-AC02-06CHI
1357]; National - 1.0 Science Foundation; University of Wisconsin;
Lundbeck foundation
FX Work at the University of Wisconsin was funded in part by the Department
of Energy, Office of Basic Energy Sciences, the National - 1.0 Science
Foundation, and the University of Wisconsin. Supercomputing time at
NERSC, PNNL, and NCCS and ORNL is gratefully -1.5 acknowledged. Use of
the Center for Nanoscale Materials at ANL was supported by the US
Department of Energy, Office of Basic Energy Sciences, under Contract
No. DE-AC02-06CHI 1357. JR would like to thank CAMD, which is funded by
the Lundbeck foundation.
NR 51
TC 92
Z9 92
U1 14
U2 100
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-6028
J9 SURF SCI
JI Surf. Sci.
PD NOV 1
PY 2008
VL 602
IS 21
BP 3424
EP 3431
DI 10.1016/j.susc.2008.08.011
PG 8
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 377JF
UT WOS:000261246800030
ER
PT J
AU DeMarco, A
Dalal, RM
Kahanda, M
Mullapudi, U
Pai, J
Hammel, C
Liebling, CNB
Patel, V
Brodie, JD
Schiffer, WK
Dewey, SL
Aquilina, SD
AF DeMarco, Amy
Dalal, Reema M.
Kahanda, Milan
Mullapudi, Uma
Pai, Jessica
Hammel, Crystie
Liebling, Courtney N. B.
Patel, Vinal
Brodie, Jonathan D.
Schiffer, Wynne K.
Dewey, Stephen L.
Aquilina, Stefanie D.
TI Subchronic racemic gamma vinyl-GABA produces weight loss in Sprague
Dawley and Zucker fatty rats
SO SYNAPSE
LA English
DT Article
DE vigabatrin; GABA; obesity; binge eating disorder; Zucker fatty rat
ID ETHANOLAMINE-O-SULFATE; INGESTIVE BEHAVIOR; COCAINE ADDICTION;
METHAMPHETAMINE; INCREASES; VIGABATRIN; INHIBITOR; MUSCIMOL; DOPAMINE;
SAFETY
AB Given the growing obesity epidemic, pressure to develop an effective pharmacologic treatment is mounting. Following the completion of a randomized, double-blind, placebo controlled trial as well as two small open label trials, gamma vinyl-GABA (GVG) has been shown to be safe and effective for treating cocaine and/or methamphetamine dependence. In an extension of these findings, the present study examined whether GVG could produce weight loss in adolescent as well as genetically obese animals. Specifically, adolescent Sprague Dawley and adolescent and adult Zucker fatty rats received GVG at various doses (75-300 mg/kg, i.p., racemic) for treatment periods lasting no longer than 14 consecutive days. GVG produced significant weight loss in a dose dependent fashion in all groups. These effects were marked, as average decreases of 12-20% of original body weight were observed. These findings suggest that GVG may be useful as a treatment for obesity. Further, that these results occurred in genetically obese animals offers the possibility that GVG may even help manage severe obesity resulting from binge-eating, a disorder involving food consumption in a pattern similar to the compulsive drug-seeking behavior observed in cocaine and methamphetamine dependent subjects.
C1 [DeMarco, Amy; Kahanda, Milan; Hammel, Crystie; Liebling, Courtney N. B.; Patel, Vinal; Schiffer, Wynne K.; Dewey, Stephen L.] Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA.
[Dalal, Reema M.; Pai, Jessica; Brodie, Jonathan D.] NYU, New York, NY 10016 USA.
[Mullapudi, Uma] Dartmouth Coll, Hanover, NH 03755 USA.
[Aquilina, Stefanie D.] Cornell Univ, Ithaca, NY 14850 USA.
RP DeMarco, A (reprint author), Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA.
EM ald2126@columbia.edu
OI Brodie, Jonathan/0000-0002-2254-8654
FU NIDA NIH HHS [DA 15041, DA 22346]
NR 16
TC 1
Z9 1
U1 0
U2 2
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0887-4476
J9 SYNAPSE
JI Synapse
PD NOV
PY 2008
VL 62
IS 11
BP 870
EP 872
DI 10.1002/syn.20555
PG 3
WC Neurosciences
SC Neurosciences & Neurology
GA 354RZ
UT WOS:000259658000008
PM 18720383
ER
PT J
AU Larson, ED
Consonni, S
Katofsky, RE
Iisa, K
Frederick, WJ
AF Larson, Eric D.
Consonni, Stefano
Katofsky, Ryan E.
Iisa, Kristiina
Frederick, W. James, Jr.
TI An assessment of gasification-based biorefining at kraft pulp and paper
mills in the United States, Part A: Background and assumptions
SO TAPPI JOURNAL
LA English
DT Article
AB Commercialization of black liquor and biomass gasification technologies is anticipated in the 2010-2015 time frame, and synthesis gas from gasifiers can be converted into liquid fuels using catalytic synthesis technologies that are already commercially established in the gas-to-liquids or coal-to-liquids industries. This set of two papers describes key results from a major assessment of the prospective energy, environmental, and financial performance of commercial gasification-based biorefineries integrated with kraft pulp and paper mills [1]. Seven detailed biorefinery designs were developed for a reference mill in the southeastern United States, together with the associated mass/energy balances, air emissions estimates, and capital investment requirements. The biorefineries provide chemical recovery services and co-produce process steam for the mill, some electricity, and one of three liquid fuels: a Fischer-Tropsch synthetic crude oil (which could be refined to vehicle fuels at an existing petroleum refinery), dimethyl ether (a diesel engine fuel or propane substitute), or an ethanol-rich mixed-alcohol product. This paper describes the key assumptions that underlie the biorefinery designs. Part B will present analytical results.
C1 [Larson, Eric D.] Princeton Univ, Princeton Environm Inst, Princeton, NJ 08544 USA.
[Consonni, Stefano] Politecn Milan, Dept Energy Engn, I-20133 Milan, Italy.
[Frederick, W. James, Jr.] Natl Renewable Energy Lab, Thermochem Platform Program, Golden, CO USA.
RP Larson, ED (reprint author), Princeton Univ, Princeton Environm Inst, Princeton, NJ 08544 USA.
EM elarson@princeton.edu
OI Consonni, Stefano/0000-0002-4158-4140
FU U.S. Department of Energy Biomass Program; American Forest and Paper
Association; Princeton University Carbon Mitigation Initiative; William
and Flora Hewlett Foundation; Institute of Paper Science and Technology
(IPST)
FX For primary financial Support, we thank the U.S. Department of Energy
Biomass Program and the American Forest and Paper Association.
Additionally, support is gratefully acknowledged from the Princeton
University Carbon Mitigation Initiative, the William and Flora Hewlett
Foundation, and the member companies of the Institute of Paper Science
and Technology (IPST) (at the Georgia Institute of Technology) who have
sponsored IPST's research project, "Gasification and Biorefinery
Development."
NR 14
TC 9
Z9 9
U1 0
U2 6
PU TECH ASSOC PULP PAPER IND INC
PI NORCROSS
PA 15 TECHNOLOGY PARK SOUTH, NORCROSS, GA 30092 USA
SN 0734-1415
J9 TAPPI J
JI TAPPI J.
PD NOV
PY 2008
VL 7
IS 11
BP 8
EP 14
PG 7
WC Materials Science, Paper & Wood
SC Materials Science
GA 378JR
UT WOS:000261317500003
ER
PT J
AU Hall, SR
Farber, DL
Audin, L
Finkel, RC
Meriaux, AS
AF Hall, S. R.
Farber, D. L.
Audin, L.
Finkel, R. C.
Meriaux, A. -S.
TI Geochronology of pediment surfaces in southern Peru: Implications for
Quaternary deformation of the Andean forearc
SO TECTONOPHYSICS
LA English
DT Article; Proceedings Paper
CT 6th International Symposium on Andean Geodynamics (ISAG)
CY SEP 12-14, 2005
CL Barcelona, SPAIN
DE Beryllium-10; Cosmogenic; Central Andes; Peru; Pediment; Forearc
ID PORPHYRY COPPER PROVINCE; NORTHERN CHILE; ATACAMA DESERT;
CLIMATE-CHANGE; SUPERGENE ENRICHMENT; BOLIVIAN ALTIPLANO; MIOCENE AGE;
NAZCA RIDGE; UPLIFT; EVOLUTION
AB The geomorphology of the Andean forearc has historically been viewed as an old remnant of a late Miocene planar landscape with no significant active structures accommodating Quaternary deformation. However, the well-preserved sequence of planation surfaces and strath terraces developed within the forearc of southern Peru provide evidence of recent uplift along the western margin. Previously, the abandonment of these surfaces was attributed to uplift of late Miocene age, however, abrupt changes in topography and drainage incision within the pediment surfaces indicate recent deformation. We use in situ produced (10)Be to determine the exposure ages of these abandoned surfaces in order to derive the spatial and temporal extent of this tectonic activity. Our new results, in contrast to previous work, yield pediment surface ages of similar to 119 ka, similar to 203 ka, similar to 278 ka, similar to 549 ka and similar to 1003 ka indicating a youthful morphology. Additionally, these surfaces are affected by steeply dipping active faults producing localized deformation, which can be quantified. Incision rates, based on the exposure ages of abandoned strath surfaces are on the order of 0.04-0.3 mm/yr. The data set presented here not only suggests significant active deformation within the forearc, but also highlights a sharp contrast between the style of deformation observed on the eastern and western margins of the Andes. While the general notion is that active deformation is localized in the Subandean fold and thrust belt, our data support an emerging view where active deformation is occurring in the western margin as well. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Hall, S. R.] Univ Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95060 USA.
[Farber, D. L.; Finkel, R. C.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Audin, L.] IRD, Lima 18, Peru.
[Meriaux, A. -S.] Univ Edinburgh, Inst Geog, Edinburgh EH8 9XP, Midlothian, Scotland.
RP Hall, SR (reprint author), Univ Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95060 USA.
EM shall@pmc.ucsc.edu
RI Meriaux, Anne-Sophie/G-1754-2010; Farber, Daniel/F-9237-2011; laurence,
audin/D-7727-2013
OI laurence, audin/0000-0002-4510-479X
NR 73
TC 19
Z9 19
U1 1
U2 10
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0040-1951
J9 TECTONOPHYSICS
JI Tectonophysics
PD NOV 1
PY 2008
VL 459
IS 1-4
BP 186
EP 205
DI 10.1016/j.tecto.2007.11.073
PG 20
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 379BK
UT WOS:000261369300013
ER
PT J
AU Mathelin, L
Bataille, F
Zhou, Y
AF Mathelin, Lionel
Bataille, Francoise
Zhou, Ye
TI Theoretical investigation of some thermal effects in turbulence modeling
SO THEORETICAL AND COMPUTATIONAL FLUID DYNAMICS
LA English
DT Article
DE Turbulence modeling; Non-isothermal flow; DIA; Compressible turbulence
ID DIRECT-INTERACTION APPROXIMATION; WEAKLY COMPRESSIBLE TURBULENCE;
ISOTROPIC TURBULENCE; FLOWS; CLOSURES
AB Fluid compressibility effects arising from thermal rather than dynamical aspects are theoretically investigated in the framework of turbulent flows. The Mach number is considered low and not to induce significant compressibility effects which here occur due to a very high thermal gradient within the flowfield. With the use of the Two-Scale Direct Interaction Approximation approach, essential turbulent correlations are derived in a one-point one-time framework. In the low velocity gradient limit, they are shown to directly depend on the temperature gradient, assumed large. The impact of thermal effects onto the transport equations of the turbulent kinetic energy and dissipation rate is also investigated, together with the transport equation for both the density and the internal energy variance.
C1 [Mathelin, Lionel] LIMSI CNRS, F-91403 Orsay, France.
[Bataille, Francoise] Tecnosud, PROMES CNRS, F-66100 Perpignan, France.
[Zhou, Ye] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Mathelin, L (reprint author), LIMSI CNRS, BP 133, F-91403 Orsay, France.
EM mathelin@limsi.fr; Francoise.Daumas-Bataille@Univ-Perp.fr;
zhou3@llnl.gov
FU Universite de Perpignan
FX The first two authors (L. M. and F. B.) gratefully acknowledge Dr.
Robert Rubinstein and Professor M. Yousuff Hussaini for fruitful
discussions and support in initiating this work. The third author (Y.Z.)
gratefully acknowledges the financial support provided by Universite de
Perpignan that made his visit to PROMES possible.
NR 15
TC 1
Z9 1
U1 0
U2 2
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0935-4964
J9 THEOR COMP FLUID DYN
JI Theor. Comput. Fluid Dyn.
PD NOV
PY 2008
VL 22
IS 6
BP 471
EP 483
DI 10.1007/s00162-008-0087-0
PG 13
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 365BL
UT WOS:000260380800003
ER
PT J
AU Kenyon, EM
Hughes, MF
Adair, BM
Highfill, JH
Crecelius, EA
Clewell, HJ
Yager, JW
AF Kenyon, E. M.
Hughes, M. F.
Adair, B. M.
Highfill, J. H.
Crecelius, E. A.
Clewell, H. J.
Yager, J. W.
TI Tissue distribution and urinary excretion of inorganic arsenic and its
methylated metabolites in C57BL6 mice following subchronic exposure to
arsenate in drinking water
SO TOXICOLOGY AND APPLIED PHARMACOLOGY
LA English
DT Article; Proceedings Paper
CT 47th Annual Meeting of the Society-Toxicology
CY MAR 16-20, 2008
CL Seattle, WA
SP Soc Toxicol
DE Arsenic pharmacokinetics; Arsenate; Subchronic drinking water exposure;
Mice
ID ATOMIC-ABSORPTION-SPECTROMETRY; DIMETHYLARSINOUS ACID; TRIVALENT
ARSENICALS; RAT-BLOOD; METHYLTRANSFERASE; GLUTATHIONE; INDUCTION;
METALLOTHIONEIN; ACCUMULATION; TRANSFERASE
AB The relationship of exposure and tissue concentration of parent chemical and metabolites over prolonged exposure is a critical issue for chronic toxicities mediated by metabolite(s) rather than parent chemical alone. This is an issue As-V because its trivalent metabolites have unique toxicities and relatively greater potency compared to their pentavalent counterparts for many endpoints. In this study, dose-dependency in tissue distribution and urinary excretion for inorganic arsenic and its methylated metabolites was assessed in female C57B1/6 mice exposed to 0, 0.5, 2, 10 or 50 ppm arsenic (as arsenate, As-V) in their drinking water for 12 weeks. No adverse effects were observed and body weight gain did not differ significantly among groups. Urinary excretion of arsenite mono methylarsonous acid (MMA(III)), dimethylarsinous acid (DMA(III)), dimethylarsinic acid (DMA(V)), and trimethylarsine oxide (TMAO) increased linearly with dose, whereas As-V and mono methylarsonic acid (MMA(V)) excretion was non-linear with respect to dose. Total tissue arsenic accumulation was greatest in kidney > lung > urinary bladder >>> skin > blood > liver. Monomethyl arsenic (MMA, i.e. MMA(III)+MMA(V)) was the predominant metabolite in kidney, whereas dimethylarsenic (DMA, i.e., DMA(III)+DMA(V)) was the predominant metabolite in lung. Urinary bladder tissue had roughly equivalent levels of inorganic arsenic and dimethylarsenic, as did skin. These data indicate that pharmacokinetic models for arsenic metabolism and disposition need to include mechanisms for organ-specific accumulation of some arsenicals and that urinary metabolite profiles are not necessarily reflective of target tissue dosimetry. Published by Elsevier Inc.
C1 [Kenyon, E. M.; Hughes, M. F.; Adair, B. M.; Highfill, J. H.] US EPA, Off Res & Dev, Natl Hlth & Environm Effects Res Lab, Expt Toxicol Div,Pharmacokinet Branch, Res Triangle Pk, NC 27711 USA.
[Crecelius, E. A.] Battelle Marine Sci Lab, Sequim, WA USA.
[Clewell, H. J.] Hamner Inst Hlth Sci, Res Triangle Pk, NC 27709 USA.
[Yager, J. W.] Univ New Mexico, Albuquerque, NM 87131 USA.
RP Kenyon, EM (reprint author), US EPA, Off Res & Dev, Natl Hlth & Environm Effects Res Lab, Expt Toxicol Div,Pharmacokinet Branch, Mail Stop B143-01, Res Triangle Pk, NC 27711 USA.
EM kenyon.elaina@epa.gov
NR 35
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U1 0
U2 8
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 NOV 1
PY 2008
VL 232
IS 3
BP 448
EP 455
DI 10.1016/j.taap.2008.07.018
PG 8
WC Pharmacology & Pharmacy; Toxicology
SC Pharmacology & Pharmacy; Toxicology
GA 366IX
UT WOS:000260475500010
PM 18706920
ER
PT J
AU Bellgraph, BJ
Brown, RS
Stephenson, JR
Welch, AE
Deters, KA
Carlson, TJ
AF Bellgraph, Brian J.
Brown, Richard S.
Stephenson, John R.
Welch, Abigail E.
Deters, Katherine A.
Carlson, Thomas J.
TI Healing Rate of Swim Bladders in Rainbow Trout
SO TRANSACTIONS OF THE AMERICAN FISHERIES SOCIETY
LA English
DT Article
ID BUOYANCY REGULATION; DECOMPRESSION; BAROTRAUMA; BEHAVIOR; TRAUMA; FISHES
AB Swim bladders Of juvenile rainbow trout Oncorhynchus mykiss were ruptured and subsequently observed for 28 d to identify healing patterns of swim bladder wounds and the effect of swim bladder rupture on direct mortality. Healing began within 7 d, wounds were completely closed after 14 d, and no mortality occurred. The healing process followed a pattern in which tissue first thickened around the opening (7-14 d), scarring of the ruptured area occurred. and evidence of the wound ultimately disappeared (21-28 d). The healing observed in juvenile rainbow trout suggests that swim bladder rupture does not result in direct mortality as was hypothesized however. the indirect effects of swim bladder injury (e.g., a decreased ability to swim efficiently) may lead to mortality by predation or other natural phenomena that were not observable in this study.
C1 [Bellgraph, Brian J.; Brown, Richard S.; Stephenson, John R.; Welch, Abigail E.; Deters, Katherine A.; Carlson, Thomas J.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Bellgraph, BJ (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA.
EM brian.bellgraph@pnl.gov
FU U.S. Army Corps of Engineers Portland District [AGRW66QKZ7010121]; U.S.
Department of Energy [DE-AC05-76RL01830]
FX Funding was provided by the U.S. Army Corps of Engineers Portland
District (Contract Number AGRW66QKZ7010121). We acknowledge the
scientific advice and insight of Martin Ahmann, Blaine Ebberts, and Dan
Feil of the U.S. Army Corps of Engineers. Pacific Northwest National
Laboratory animal facilities used in this research were certified by the
Association for Assessment and Accreditation of Laboratory Animal Care;
animals were handled in accordance with federal guidelines for the care
and use of laboratory animals, and protocols for our study were approved
by the Institutional Animal Care and Use Committee at Battelle-Pacific
Northwest Division. We thank Kathleen Carter for reviewing the
manuscript and Andrea Currie for editing the manuscript. The Pacific
Northwest National Laboratory is operated by Battelle for the U.S.
Department of Energy under Contract Number DE-AC05-76RL01830.
NR 19
TC 8
Z9 8
U1 1
U2 12
PU AMER FISHERIES SOC
PI BETHESDA
PA 5410 GROSVENOR LANE SUITE 110, BETHESDA, MD 20814-2199 USA
SN 0002-8487
J9 T AM FISH SOC
JI Trans. Am. Fish. Soc.
PD NOV
PY 2008
VL 137
IS 6
BP 1791
EP 1794
DI 10.1577/T07-167.1
PG 4
WC Fisheries
SC Fisheries
GA 477EG
UT WOS:000268500800018
ER
PT J
AU Calvo-Alvarado, JC
McDowell, NG
Waring, RH
AF Calvo-Alvarado, J. C.
McDowell, N. G.
Waring, R. H.
TI Allometric relationships predicting foliar biomass and leaf area:sapwood
area ratio from tree height in five Costa Rican rain forest species
SO TREE PHYSIOLOGY
LA English
DT Article
DE Carapa guianensis; hydraulic model; leaf area; leaf biomass;
Pentaclethra macroloba; pipe-model theory; sapwood area; specific leaf
area; Tetragastris panamensis; Virola koshnii; Vochysia ferruginea
ID HYDRAULIC LIMITATION HYPOTHESIS; CONDUCTING SAPWOOD AREA; SCOTS PINE;
WATER TRANSPORT; LODGEPOLE PINE; STAND DENSITY; DOUGLAS-FIR; PATTERNS;
INDEX; PLANTS
AB We developed allometric equations to predict whole-tree leaf area (A(1)), leaf biomass (M-1) and leaf area to sap-wood area ratio (A,:A,) in five rain forest tree species of Costa Rica: Pentaclethra macroloba (Willd.) Kuntze (Fabaceae/Mim), Carapa guianensis Aubl. (Meliaceae), Vochysia ferruginea Mart. (Vochysiaceae), Virola koshnii Warb. (Myristicaceae) and Tetragastris panamensis (Engl.) Kuntze (Burseraceae). By destructive analyses (n = 11-14 trees per species), we observed strong nonlinear allometric relationships (r(2) >= 0.9) for predicting A(1) or M-1 from stem diameters or A(s) measured at breast height. Linear relationships were less accurate. In general, A1:A(s) at breast height increased linearly with tree height except for Pentaclethra, which showed a negative trend. All species, however, showed increased total A(1) with height. The observation that four of the five species increased in A(1)A(s) with height is consistent with hypotheses about trade-offs between morphological and anatomical adaptations that favor efficient water flow through variation in the amount of leaf area Supported by sapwood and those imposed by the need to respond quickly to light gaps in the canopy.
C1 [Calvo-Alvarado, J. C.] ITCR, Escuela Ingn Forestal, Cartago, Costa Rica.
[McDowell, N. G.] Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
[Waring, R. H.] Oregon State Univ, Coll Forestry, Corvallis, OR 97331 USA.
RP Calvo-Alvarado, JC (reprint author), ITCR, Escuela Ingn Forestal, Cartago, Costa Rica.
EM jucalvo@itcr.ac.cr
RI Waring, Richared/C-4796-2014;
OI Waring, Richared/0000-0003-2533-3664; Calvo-Alvarado, Julio
Cesar/0000-0001-9555-6420
FU Instituto Technologico de Costa Rica; Organization for Tropical Studies;
NASA National Space Technology Laboratory
FX This project Was Supported by the Instituto Technologico de Costa Rica
and the Organization for Tropical Studies. Funding was provided by the
Organization for Tropical Studies through a research project conducted
by NASA National Space Technology Laboratory (renamed Stennis Space
Center) in Mississippi, USA. Special thanks to all collaborators: Dr.
Armond Joyce (NASA): Dr. Donald Stone and Dr. Charles Schnell (OTS): Dr.
Edgar Ortiz (ITCR): and Ing. Hector Arce and Ing. Alsemo Acuna
(Direccion General Forestal-CORENA-GCR-AID-515-T-032 Project). We are
grateful to Ing. Javier Zamora and Tec. Didier Salas for their support
throughout this study.
NR 57
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U1 1
U2 27
PU HERON PUBLISHING
PI VICTORIA
PA 202, 3994 SHELBOURNE ST, VICTORIA, BC V8N 3E2, CANADA
SN 0829-318X
J9 TREE PHYSIOL
JI Tree Physiol.
PD NOV
PY 2008
VL 28
IS 11
BP 1601
EP 1608
PG 8
WC Forestry
SC Forestry
GA 371TW
UT WOS:000260855200001
PM 18765365
ER
PT J
AU van Elsas, JD
Costal, R
Jansson, J
Sjoling, S
Bailey, M
Nalin, R
Vogel, TM
van Overbeek, L
AF van Elsas, Jan Dirk
Costal, Rodrigo
Jansson, Janet
Sjoling, Sara
Bailey, Mark
Nalin, Renaud
Vogel, Timothy M.
van Overbeek, Leo
TI The metagenomics of disease-suppressive soils - experiences from the
METACONTROL project
SO TRENDS IN BIOTECHNOLOGY
LA English
DT Review
ID WIDE HOST-RANGE; COMMUNITY STRUCTURE; UNCULTURED MICROORGANISMS;
FUNCTIONAL DIVERSITY; ESCHERICHIA-COLI; ENVIRONMENTAL LIBRARIES;
MICROBIAL COMMUNITIES; NATURAL-PRODUCTS; GENE-EXPRESSION; DNA
AB Soil teems with microbial genetic information that can be exploited for biotechnological innovation. Because only a fraction of the soil microbiota is cultivable, our ability to unlock this genetic complement has been hampered. Recently developed molecular tools, which make it possible to utilize genomic DNA from soil, can bypass cultivation and provide information on the collective soil metagenome with the aim to explore genes that encode functions of key interest to biotechnology. The metagenome of disease-suppressive soils is of particular interest given the expected prevalence of antibiotic biosynthetic clusters. However, owing to the complexity of soil microbial communities, deciphering this key genetic information is challenging. Here, we examine crucial issues and challenges that so far have hindered the metagenomic exploration of soil by drawing on experience from a trans-European project on disease-suppressive soils denoted METACONTROL.
C1 [van Elsas, Jan Dirk; Costal, Rodrigo] Univ Groningen, Dept Microbial Ecol, Ctr Ecol & Evolutionary Studies, NL-9750 AA Haren, Netherlands.
[Jansson, Janet] Swedish Univ Agr Sci, Dept Microbiol, Genet Ctr, S-75007 Uppsala, Sweden.
[Jansson, Janet] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Dept Ecol, Berkeley, CA 94720 USA.
[Sjoling, Sara] Sodertorn Univ Coll, Sch Life Sci, S-14189 Huddinge, Sweden.
[Bailey, Mark] Ctr Ecol & Hydrol, Mol Microbial Ecol Grp, Oxford OX1 3SR, England.
[Nalin, Renaud] LibraGen SA, F-31400 Toulouse, France.
[Vogel, Timothy M.] Univ Lyon, Ecole Cent Lyon, Lab AMPERE, F-69134 Ecully, France.
[van Overbeek, Leo] Plant Res Int, Wageningen, Netherlands.
RP van Elsas, JD (reprint author), Univ Groningen, Dept Microbial Ecol, Ctr Ecol & Evolutionary Studies, Kerklaan 30, NL-9750 AA Haren, Netherlands.
EM j.d.van.elsas@rug.nl
RI Ducey, Thomas/A-6493-2011; Jansson, Janet/F-9951-2012; Costa,
Rodrigo/N-7274-2013;
OI Costa, Rodrigo/0000-0002-5932-4101; Vogel, Timothy/0000-0002-9542-3246
FU Soil Biotechnology Foundation (Groningen)
FX This work was supported by funding received under the EU METACONTROL
project (QLK3-CT-2002-02068). R.C. received support from the Soil
Biotechnology Foundation (Groningen).
NR 67
TC 48
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U1 5
U2 48
PU ELSEVIER SCIENCE LONDON
PI LONDON
PA 84 THEOBALDS RD, LONDON WC1X 8RR, ENGLAND
SN 0167-7799
J9 TRENDS BIOTECHNOL
JI Trends Biotechnol.
PD NOV
PY 2008
VL 26
IS 11
BP 591
EP 601
DI 10.1016/j.tibtech.2008.07.004
PG 11
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA 370ZW
UT WOS:000260802600003
PM 18774191
ER
PT J
AU Kim, JB
Grate, JW
Wang, P
AF Kim, Jungbae
Grate, Jay W.
Wang, Ping
TI Nanobiocatalysis and its potential applications
SO TRENDS IN BIOTECHNOLOGY
LA English
DT Review
ID INTERFACE-BINDING CHLOROPEROXIDASE; SINGLE-ENZYME NANOPARTICLES;
MESOCELLULAR CARBON FOAM; MESOPOROUS SILICA; BIOFUEL CELLS;
ORGANIC-SOLVENTS; DEHYDROGENASE ENZYMES; BIOCATALYTIC ACTIVITY;
OIL/WATER INTERFACES; NANOPOROUS SUPPORT
AB Nanobiocatalysis, in which enzymes are incorporated into nanostructured materials, has emerged as a rapidly growing area. Nanostructures, including nanoporous media, nanofibers, carbon nanotubes and nanoparticles, have manifested great efficiency in the manipulation of the nanoscale environment of the enzyme and thus promise exciting advances in many areas of enzyme technology. This review will describe these recent developments in nanobiocatalysis and their potential applications in various fields, such as trypsin digestion in proteomic analysis, antifouling, and biofuel cells.
C1 [Kim, Jungbae] Korea Univ, Dept Biol & Chem Engn, Seoul 136701, South Korea.
[Grate, Jay W.] Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA.
RP Kim, JB (reprint author), Korea Univ, Dept Biol & Chem Engn, Seoul 136701, South Korea.
EM jbkim3@korea.ac.kr; ping@umn.edu
FU Korea Research Foundation [IKRF-2007-313-D001521]
FX Parts of this work were supported by a Korea Research Foundation Grant
funded by the Korean Government (MOEHRD, Basic Research Promotion Fund)
IKRF-2007-313-D001521. We appreciate S-H. Jun and B. Lee for their help
in the preparation of figures. J.W.G. acknowledges the William R. Wiley
Environmental Molecular Sciences Laboratory, a US Department of Energy
(DOE) scientific user facility operated for the DOE by the Pacific
Northwest National Laboratory (PNNL). The PNNL is a multiprogram
national laboratory operated for the US DOE by the Battelle Memorial
lnstitute.
NR 76
TC 203
Z9 207
U1 9
U2 89
PU ELSEVIER SCIENCE LONDON
PI LONDON
PA 84 THEOBALDS RD, LONDON WC1X 8RR, ENGLAND
SN 0167-7799
J9 TRENDS BIOTECHNOL
JI Trends Biotechnol.
PD NOV
PY 2008
VL 26
IS 11
BP 639
EP 646
DI 10.1016/j.tibtech.2008.07.009
PG 8
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA 370ZW
UT WOS:000260802600008
PM 18804884
ER
PT J
AU Chiaramonti, AN
Thompson, LJ
Egelhoff, WF
Kabius, BC
Petford-Long, AK
AF Chiaramonti, A. N.
Thompson, L. J.
Egelhoff, W. F.
Kabius, B. C.
Petford-Long, A. K.
TI In situ TEM studies of local transport and structure in nanoscale
multilayer films
SO ULTRAMICROSCOPY
LA English
DT Article
DE Transmission electron microscopy; Microscopic methods for solid
interfaces and multilayers; In situ
ID TRANSMISSION ELECTRON-MICROSCOPY; MAGNETIC TUNNEL-JUNCTIONS;
ATOMIC-FORCE MICROSCOPY; MAGNETORESISTANCE; CONDUCTANCE; BARRIERS;
CONTACT; DAMAGE
AB This paper describes a novel technique for studying structure-transport correlations in nanoscale multilayer thin films. Here, local current-voltage characteristics from simplified magnetic tunnel junctions are measured in situ on cross-sectional transmission electron microscopy (TEM) samples and correlated directly with TEM images of the microstructure at the tunneling site. It is found that local variations in barrier proper-ties can be detected by a point probe method, and that the tunneling barrier height and width can be extracted. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Chiaramonti, A. N.; Thompson, L. J.; Kabius, B. C.; Petford-Long, A. K.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Egelhoff, W. F.] NIST, Magnet Mat Grp, Gaithersburg, MD 20899 USA.
RP Chiaramonti, AN (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM chiaramonti@anl.gov
RI Chiaramonti, Ann/E-7459-2013; Petford-Long, Amanda/P-6026-2014
OI Chiaramonti, Ann/0000-0001-9933-3267; Petford-Long,
Amanda/0000-0002-3154-8090
FU U.S. Department of Energy Office of Science Laboratory
[DE-AC02-06CH11357]
FX The electron microscopy and FIB sample preparation were accomplished at
the Electron Microscopy Center for Materials Research at Argonne
National Laboratory. The authors would like to thank J.M. Hiller for
assisting with the FIB sample development and preparation. This
manuscript has been created by UChicago Argonne, LLC, Operator of
Argonne National Laboratory (Argonne). Argonne, a U.S. Department of
Energy Office of Science Laboratory, is operated under Contract no.
DE-AC02-06CH11357.
NR 51
TC 6
Z9 6
U1 0
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3991
EI 1879-2723
J9 ULTRAMICROSCOPY
JI Ultramicroscopy
PD NOV
PY 2008
VL 108
IS 12
BP 1529
EP 1535
DI 10.1016/j.ultramic.2008.04.008
PG 7
WC Microscopy
SC Microscopy
GA 371CB
UT WOS:000260808300005
PM 18556122
ER
PT J
AU Arslan, I
Marquis, EA
Homer, M
Hekmaty, MA
Bartelt, NC
AF Arslan, Ilke
Marquis, Emmanuelle A.
Homer, Mark
Hekmaty, Michelle A.
Bartelt, Norman C.
TI Towards better 3-D reconstructions by combining electron tomography and
atom-probe tomography
SO ULTRAMICROSCOPY
LA English
DT Article
DE STEM tomography; Atom-probe tomography; Three-dimensional
reconstructions; Reconstruction artifacts
ID 3-DIMENSIONAL RECONSTRUCTION; MISSING WEDGE; MICROSCOPE; RESOLUTION;
PROJECTIONS; STEM
AB Scanning transmission electron microscope tomography and atom-probe tomography are both three-dimensional techniques on the nanoscale. We demonstrate here the combination of the techniques by analyzing the very same volume of an Al-Ag alloy specimen. This comparison allows us to directly visualize the theoretically known artifacts of each technique experimentally, providing insight into the optimal parameters to use for reconstructions and assessing the quality of each reconstruction. The combination of the techniques for accurate morphology and compositional information in three dimensions at the nanoscale provides a route for a new level of materials characterization and understanding. Published by Elsevier B.V.
C1 [Arslan, Ilke; Homer, Mark; Hekmaty, Michelle A.; Bartelt, Norman C.] Sandia Natl Labs, Livermore, CA 94550 USA.
[Marquis, Emmanuelle A.] Univ Oxford, Dept Mat, Oxford OX1 3PH, England.
RP Arslan, I (reprint author), Sandia Natl Labs, 7011 E Ave, Livermore, CA 94550 USA.
EM iarslan@sandia.gov
RI Bartelt, Norman/G-2927-2012; Marquis, Emmanuelle/O-5647-2014
OI Marquis, Emmanuelle/0000-0002-6476-2835
FU United States Department of Energy [DE-AC04-94AL85000,
DE-AC04-94AL850001]; National Security Science and Engineering; Office
of Basic Energy Sciences; Engineering and Physical Sciences Research
Council (EPSRC) [EP/077664]
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. I.A. gratefully acknowledges support
by Sandia's President Harry S. Truman Fellowship in National Security
Science and Engineering, a Laboratory Directed Research and Development
Program (LDRD). This work was supported in part by the Office of Basic
Energy Sciences, Division of Materials Sciences, US Department of
Energy, under Contract No. DE-AC04-94AL850001. E.A.M. acknowledges
support from the Engineering and Physical Sciences Research Council
(EPSRC) under grant number EP/077664. We acknowledge D.L. Medlin for
helpful discussions.
NR 23
TC 55
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U1 2
U2 35
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3991
J9 ULTRAMICROSCOPY
JI Ultramicroscopy
PD NOV
PY 2008
VL 108
IS 12
BP 1579
EP 1585
DI 10.1016/j.ultramic.2008.05.008
PG 7
WC Microscopy
SC Microscopy
GA 371CB
UT WOS:000260808300012
PM 18620812
ER
PT J
AU Yaguchi, T
Konno, M
Kamino, T
Watanabe, M
AF Yaguchi, Toshie
Konno, Mitsuru
Kamino, Takeo
Watanabe, Masashi
TI Observation of three-dimensional elemental distributions of a Si device
using a 360 degrees-tilt FIB and the cold field-emission STEM system
SO ULTRAMICROSCOPY
LA English
DT Article
DE Focused ion beam; Scanning transmission electron microscopy;
Energy-dispersive X-ray spectroscopy; Principle component analysis;
Three-dimensional elemental distribution
ID MULTIVARIATE STATISTICAL-ANALYSIS; TRANSMISSION ELECTRON-MICROSCOPY; RAY
SPECTRAL IMAGES; MATERIALS SCIENCE; 3 DIMENSIONS; ZEOLITE-Y; TOMOGRAPHY;
MICROANALYSIS; RECONSTRUCTION; INFORMATION
AB A technique for preparation of a pillar-shaped specimen and its multidirectional observation using a combination of a scanning transmission electron microscope (STEM) and a focused ion beam (FIB) instrument has been developed. The system employs an FIB/STEM compatible holder with a specially designed tilt mechanism, which allows the specimen to be tilted through 360 degrees [T. Yaguchi, M. Konno, T. Kamino, T. Hashimoto, T. Ohnishi, K. Umemura, K. Asayama, Microsc. Microanal. 9 (Suppl. 2) (2003) 118; T. Yaguchi, M. Konno, T. Kamino, T. Hashimoto, T. Ohnishi, M. Watanabe, Microsc. Microanal. 10 (Suppl. 2) (2004) 1030]. This technique was applied to obtain the three-dimensional (3D) elemental distributions around a contact plug of a Si device used in a 90-nm technology. A specimen containing only one contact plug was prepared in the shape of a pillar with a diameter of 200 nm and a length of 5 pm. Elemental maps were obtained from the pillar specimen using a 200-kV cold-field emission gun (FEG) STEM model HD-2300C equipped with the EDAX genesis X-ray energy-dispersive spectrometry (XEDS) system through a spectrum imaging technique. In this study, elemental distributions of minor elements with weak signals were enhanced by applying principal component analysis (PCA), which is a superior technique to extract weak signals from a large dataset. The distributions of elements, especially the metallization component Ti and minor dopant As in this particular device, were successfully extracted by PCA. Finally, the 3D elemental distributions around the contact plug could be visualized by reconstruction from the tilt series of maps. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Yaguchi, Toshie; Konno, Mitsuru; Kamino, Takeo] Hitachi High Technol Corp, Naka Applicat Ctr, Ibaraki 3120057, Japan.
[Watanabe, Masashi] Lehigh Univ, Dept Mat Sci & Engn, Bethlehem, PA 18015 USA.
[Watanabe, Masashi] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
RP Yaguchi, T (reprint author), Hitachi High Technol Corp, Naka Applicat Ctr, 11-1 Ishikawa, Ibaraki 3120057, Japan.
EM yaguchi-toshie@naka.hitachi-hitec.com
FU National Science Foundation [DMR-0304738]; US Department of Energy
[DE-AC02-05CH11231]
FX The authors gratefully acknowledge Mr. Mitsuo Ogasawara, Ms. Michiyo
Miyakawa and Mr. Hirohisa Okushima for 3D-reconstruction software help.
MW also wishes to acknowledge the support of the National Science
Foundation through grant DMR-0304738, of Bechtel Bettis, Inc. and of the
Scientific User Facilities Division of the Office of Basic Energy
Sciences, US Department of Energy under Contract no. DE-AC02-05CH11231.
NR 31
TC 25
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U1 2
U2 15
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3991
J9 ULTRAMICROSCOPY
JI Ultramicroscopy
PD NOV
PY 2008
VL 108
IS 12
BP 1603
EP 1615
DI 10.1016/j.ultramic.2008.06.003
PG 13
WC Microscopy
SC Microscopy
GA 371CB
UT WOS:000260808300015
PM 18715717
ER
PT J
AU Evans, JE
Hetherington, C
Kirkland, A
Chang, LY
Stahlberg, H
Browning, N
AF Evans, James E.
Hetherington, Crispin
Kirkland, Angus
Chang, Lan-Yun
Stahlberg, Henning
Browning, Nigel
TI Low-dose aberration corrected cryo-electron microscopy of organic
specimens
SO ULTRAMICROSCOPY
LA English
DT Article
DE Aberration correction; Electron microscopy; TEM; Cryo-EM
ID TRANSMISSION ELECTRON-MICROSCOPY; SPHERICAL-ABERRATION; ANGSTROM
RESOLUTION; PURPLE MEMBRANE; PHASE-CONTRAST; CRYSTALS; CRYOMICROSCOPY;
MICROGRAPHS; MODEL; KV
AB Spherical aberration (C-s) correction in the transmission electron microscope has enabled sub-angstrom resolution imaging of inorganic materials. To achieve similar resolution for radiation-sensitive organic materials requires the microscope to be operated under hybrid conditions: low electron dose illumination of the specimen at liquid nitrogen temperature and low defocus values. Initial images from standard inorganic and organic test specimens have indicated that under these conditions C-s-correction can provide a significant improvement in resolution (to less than 0.16 nm) for direct imaging of organic samples. (C) 2008 Published by Elsevier B.V.
C1 [Evans, James E.; Stahlberg, Henning] Univ Calif Davis, Davis, CA 95616 USA.
[Hetherington, Crispin; Kirkland, Angus; Chang, Lan-Yun] Univ Oxford, Dept Mat, Oxford OX1 3PH, England.
[Browning, Nigel] Univ Calif Davis, Dept Mat Sci & Chem Engn, Davis, CA 95616 USA.
[Evans, James E.; Browning, Nigel] Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, Div Mat Sci & Technol, Livermore, CA 94550 USA.
RP Evans, JE (reprint author), Univ Calif Davis, 1 Shields Ave, Davis, CA 95616 USA.
EM JEEvans@ucdavis.edu
RI Stahlberg, Henning/H-1868-2011;
OI Stahlberg, Henning/0000-0002-1185-4592; Browning,
Nigel/0000-0003-0491-251X
FU National Institute of Health [P32-GM07377]; US Department of Energy
[DE-FG02-03ER46057]; Engineering and Physical Sciences Research Council;
Leverhulme Trust
FX The authors are grateful to R. Glaeser, D. Typke for providing the
paraffin solution and for relevant discussions. This work was supported
by the National Institute of Health (training Grant P32-GM07377) and by
the US Department of Energy (Grant no. DE-FG02-03ER46057). AIK
acknowledges financial support from the Engineering and Physical
Sciences Research Council and from the Leverhulme Trust.
NR 33
TC 22
Z9 22
U1 0
U2 16
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3991
J9 ULTRAMICROSCOPY
JI Ultramicroscopy
PD NOV
PY 2008
VL 108
IS 12
BP 1636
EP 1644
DI 10.1016/j.ultramic.2008.06.004
PG 9
WC Microscopy
SC Microscopy
GA 371CB
UT WOS:000260808300018
PM 18703285
ER
PT J
AU Karabutov, A
Devichensky, A
Ivochkin, A
Lyamshev, M
Pelivanov, I
Rohadgi, U
Solomatin, V
Subudhi, M
AF Karabutov, Alexander
Devichensky, Anton
Ivochkin, Alexander
Lyamshev, Michael
Pelivanov, Ivan
Rohadgi, Upendra
Solomatin, Vladimir
Subudhi, Manomohan
TI Laser ultrasonic diagnostics of residual stress
SO ULTRASONICS
LA English
DT Article; Proceedings Paper
CT Inaugural Meeting of the International Congress on Ultrasonic
CY APR 09-12, 2007
CL Vienna, AUSTRIA
DE Residual stresses; Laser ultrasonic
ID WAVES; SOLIDS
AB Ultrasonic NDE is one of the most promising methods for non-destructive diagnostics of residual stresses. However the relative change of sound velocity, which is directly proportional to applied stress, is extremely small. An initial stress of 100 MPa produces the result of delta V/V similar to 10 (4). Therefore measurements must be performed with high precision.
The required accuracy can be achieved with laser-exited ultrasonic transients. Radiation from a Nd-YAG laser (pulse duration 7 ns, pulse energy 100 mu J) was absorbed by the surface of the sample. The exited ultrasonic transients resembled the form of laser pulses. A specially designed optoacoustic transducer was used both for the excitation and detecting of the ultrasonic pulses. The wide frequency band of the piezodetector made it possible to achieve the time-of-flight measurements with an accuracy of about 0.5 ns.
This technique was used for measuring of plane residual stress in welds and for in-depth testing of subsurface residual stresses in metals. Plane stress distribution for welded metallic plates of different thicknesses (2-8 mm) and the subsurface stress distribution for titanium and nickel alloys were obtained. The results of conventional testing are in good agreement with the laser ultrasonic method. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Karabutov, Alexander; Ivochkin, Alexander; Pelivanov, Ivan; Solomatin, Vladimir] Moscow MV Lomonosov State Univ, Ctr Int Laser, Moscow 119992, Russia.
[Devichensky, Anton; Lyamshev, Michael] Russian Acad Sci, Inst Gen Phys, Moscow 119991, Russia.
[Rohadgi, Upendra; Subudhi, Manomohan] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Ivochkin, A (reprint author), Moscow MV Lomonosov State Univ, Ctr Int Laser, Moscow 119992, Russia.
EM ivochkin@yandex.ru
RI Karabutov, Alexander/E-1295-2015
NR 20
TC 15
Z9 18
U1 3
U2 19
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0041-624X
J9 ULTRASONICS
JI Ultrasonics
PD NOV
PY 2008
VL 48
IS 6-7
BP 631
EP 635
DI 10.1016/j.ultras.2008.07.006
PG 5
WC Acoustics; Radiology, Nuclear Medicine & Medical Imaging
SC Acoustics; Radiology, Nuclear Medicine & Medical Imaging
GA 370CC
UT WOS:000260739300028
PM 18762308
ER
PT J
AU Wellman, DM
Zachara, JM
Liu, C
Qafoku, NP
Smith, SC
Forrester, SW
AF Wellman, D. M.
Zachara, J. M.
Liu, C.
Qafoku, N. P.
Smith, S. C.
Forrester, S. W.
TI Advective Desorption of Uranium(VI) from Contaminated Hanford Vadose
Zone Sediments under Saturated and Unsaturated Conditions
SO VADOSE ZONE JOURNAL
LA English
DT Article
ID URANYL INCORPORATION; 2-REGION FLOW; TRANSPORT; ADSORPTION; SORPTION;
DISSOLUTION; CALCITE; U(VI); SITE; LUMINESCENCE
AB Sedimentary, hydrologic, and geochemical variations in the Hanford subsurface environment, as well as compositional differences in contaminating waste streams, have created vast differences in the migration and mobility of U within the subsurface environment. A series of hydraulically saturated and unsaturated column experiments were performed to (i) assess the effect of water content on the advective desorption and migration of U from contaminated sediments and (ii) evaluate the U concentration that can develop in pore water and/or groundwater as a result of desorption/dissolution reactions. Flow rate and moisture content were varied to evaluate the influence of contact time, pore water velocity, and macropore desaturation on aqueous U concentrations. Sediments were collected from the T-TX-TY tank farm complex and the 300 Area Process Ponds located on the Hanford Site, southeastern Washington State. The sediments vary in depth, mineralogy, and in contamination events. Experiments were conducted under mildly alkaline/calcareous conditions representative of conditions commonly encountered at repository sites across the arid western United States and, in particular, the Hanford site. Results illustrate the release of U from these sediments is kinetically controlled, and low water contents encountered within the Hanford vadose zone result in the formation of mobile immobile water regimes, which isolate a fraction of the reactive sites within the sediments, effectively reducing the concentration of U released into migrating pore waters.
C1 [Wellman, D. M.; Zachara, J. M.; Liu, C.; Qafoku, N. P.; Smith, S. C.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Forrester, S. W.] Univ Nevada, Dept Geol, Las Vegas, NV 89011 USA.
RP Wellman, DM (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd,POB 999, Richland, WA 99352 USA.
EM dawn.wellman@pnl.gov
RI Liu, Chongxuan/C-5580-2009;
OI Qafoku, Nikolla P./0000-0002-3258-5379
FU U.S. Department of Energy (USDOE)-Office of Environmental Management
(EM); U.S. Department of Energy by Battelle [DE-AC05-76RL01830]
FX This research was supported by the U.S. Department of Energy
(USDOE)-Office of Environmental Management (EM) through the Hanford
Remediation and Closure Science Project and EM-20 Environmental Cleanup
and Acceleration. Support was also provided by the Office of Biological
and Environmental Research (OBER) through the Environmental Remediation
Sciences Program. The assistance of K.N. Geiszler for conducting ICP-MS
and S. R. Baum for ICP-OES analyses is greatly appreciated. Pacific
Northwest National Laboratory is operated for the U.S. Department of
Energy by Battelle under contract DE-AC05-76RL01830.
NR 58
TC 4
Z9 4
U1 0
U2 16
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 NOV
PY 2008
VL 7
IS 4
BP 1144
EP 1159
DI 10.2136/vzj2007.0166
PG 16
WC Environmental Sciences; Soil Science; Water Resources
SC Environmental Sciences & Ecology; Agriculture; Water Resources
GA 379GL
UT WOS:000261384600005
ER
PT J
AU Tartakovsky, AM
Bolster, D
Tartakovsky, DM
AF Tartakovsky, Alexandre M.
Bolster, Diogo
Tartakovsky, Daniel M.
TI Hydrogeophysical Approach for Identification of Layered Structures of
the Vadose Zone from Electrical Resistivity Data
SO VADOSE ZONE JOURNAL
LA English
DT Article
ID HETEROGENEOUS COMPOSITE AQUIFERS; STATE UNSATURATED FLOW; POROUS-MEDIA;
SIMPLEX-METHOD; SOILS; RECONSTRUCTION; TOMOGRAPHY; PARAMETERS;
TRANSPORT; MODELS
AB The electric resistivity survey and borehole collection of resistivity data are one of the oldest geophysical tools for characterization of the vadose zone. A current trend is to conduct such surveys in a tomographic manner, which requires significant computational resources. We present a simple, semianalytical approach to delineate multiple layers in partially saturated soils from resistivity and saturation measurements taken at several depths along a borehole. The number of layers and their hydraulic properties are assumed to be known. The proposed inversion algorithm is computationally efficient and can serve either as a stand-alone tool for layer delineation or as an autonomous module in a more comprehensive geophysical survey. It is most robust when each layer is sampled at least once. When one or more layers have not been sampled, the algorithm's robustness (convergence) depends on the accuracy of an initial guess (e.g., expert knowledge and other hard or soft data). We provide a detailed analysis of the algorithm's convergence and identify potential pitfalls.
C1 [Tartakovsky, Alexandre M.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Bolster, Diogo] Tech Univ Catalonia, Barcelona, Spain.
[Tartakovsky, Daniel M.] Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093 USA.
RP Tartakovsky, AM (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM Alexandre.Tartakovsky@pnl.gov
RI Bolster, Diogo/D-9667-2011; Tartakovsky, Daniel/E-7694-2013
OI Bolster, Diogo/0000-0003-3960-4090;
FU DOE's Office of Advanced Scientific Computing Research
FX This research was supported in part by the DOE's Office of Advanced
Scientific Computing Research.
NR 40
TC 1
Z9 1
U1 0
U2 5
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 NOV
PY 2008
VL 7
IS 4
BP 1207
EP 1214
DI 10.2136/vzj2008.0009
PG 8
WC Environmental Sciences; Soil Science; Water Resources
SC Environmental Sciences & Ecology; Agriculture; Water Resources
GA 379GL
UT WOS:000261384600014
ER
PT J
AU Bolshov, L
Kondratenko, P
Matveev, L
Pruess, K
AF Bolshov, Leonid
Kondratenko, Peter
Matveev, Leonid
Pruess, Karsten
TI Elements of Fractal Generalization of Dual-Porosity Model for Solute
Transport in Unsaturated Fractured Rocks
SO VADOSE ZONE JOURNAL
LA English
DT Article
ID SELF-ORGANIZED CRITICALITY; POROUS-MEDIA; PERCOLATION THEORY;
DISPERSION; SOILS; WATER; FLOW
AB In this study, new elements were developed to generalize the dual-porosity model for moisture infiltration and solute transport in unsaturated rocks, taking into account fractal aspects of the percolation process. Random advection was considered as a basic mechanism of solute transport in self-similar fracture systems. In addition to spatial variations in the infiltration velocity field, temporal fluctuations were also taken into account. The rock matrix, which is a low-permeability component of the heterogeneous geologic medium, acts as a trap for solute particles and moisture. Scaling relations were derived for the moisture infiltration flux, the velocity correlation length, the average velocity of infiltration, and the velocity correlation function. The effect of temporal variations in precipitation intensity on the infiltration processes was analyzed. It showed that the mode of solute transport is determined by the power exponent in the advection velocity correlation function and the dimensionality of the trapping system, both of which may change with time. Therefore, depending on time, various transport regimes may be realized: superdiffusion, subdiffusion, or classical diffusion. The complex structure of breakthrough curves arising from changes in the transport regimes was also examined. A renormalization of the solute source strength due to characteristic fluctuations of highly disordered media was established.
C1 [Bolshov, Leonid; Kondratenko, Peter; Matveev, Leonid] Russian Acad Sci, Nucl Safety Inst, Moscow 115191, Russia.
[Pruess, Karsten] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Kondratenko, P (reprint author), Russian Acad Sci, Nucl Safety Inst, 52 Bolshaya Tulskaya St, Moscow 115191, Russia.
EM kondrat@ibrae.ac.ru; K_Pruess@lbl.gov
RI Matveev, Leonid/L-2604-2014; Большов, Леонид/P-9814-2015
OI Matveev, Leonid/0000-0002-7094-4395;
FU U.S. Department of Energy (USDOE); U.S. Civilian Research and
Development Foundation [RG0-20101-RW40]; Russian Academy of Sciences;
Russian Foundation for Basic Research (RFBR) [06-08-00176a]; USDOE
Office of Civilian Radioactive Waste Management [DE-AC02-05CH11231]
FX We acknowledge support from the U.S. Department of Energy (USDOE) under
the U.S. Civilian Research and Development Foundation Grant Assistance
Program Project RG0-20101-RW40 with the Institute of Nuclear Energy
Safety (IBRAE) of the Russian Academy of Sciences, and from the Russian
Foundation for Basic Research (RFBR) under Project 06-08-00176a. Dr.
Pruess also acknowledges support from the USDOE Office of Civilian
Radioactive Waste Management under Contract Number DE-AC02-05CH11231.
NR 26
TC 4
Z9 4
U1 1
U2 5
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 NOV
PY 2008
VL 7
IS 4
DI 10.2136/vzj2007.0151
PG 9
WC Environmental Sciences; Soil Science; Water Resources
SC Environmental Sciences & Ecology; Agriculture; Water Resources
GA 379GL
UT WOS:000261384600007
ER
PT J
AU Bolshov, L
Kondratenko, P
Pruess, K
Semenov, V
AF Bolshov, Leonid
Kondratenko, Peter
Pruess, Karsten
Semenov, Vladimir
TI Nonclassical Transport Processes in Geologic Media: Review of Field and
Laboratory Observations and Basic Physical Concepts
SO VADOSE ZONE JOURNAL
LA English
DT Review
ID NATURAL GRADIENT EXPERIMENT; FRACTIONAL-FLOW DIMENSIONS; POROUS
BUILDING-MATERIALS; THICK UNSATURATED ZONES; CEMENT-BASED MATERIALS;
SOLUTE TRANSPORT; FRACTURED ROCKS; TRACER TESTS; WATER-ABSORPTION;
FLUID-FLOW
AB We present an overview of the problem of solute transport in unsaturated heterogeneous media. We first review field and laboratory observations that demonstrate nonclassical flow and transport behavior. The main physical principles causing anomalous transport regimes in fractured rock media are identified. The basic factors and physical concepts needed to describe anomalous transport in saturated and unsaturated fractured rock are discussed in detail.
C1 [Bolshov, Leonid; Kondratenko, Peter; Semenov, Vladimir] Russian Acad Sci, Nucl Safety Inst, Moscow 115191, Russia.
[Pruess, Karsten] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Kondratenko, P (reprint author), Russian Acad Sci, Nucl Safety Inst, 52 Bolshaya Tulskaya St, Moscow 115191, Russia.
EM kondrat@ibrae.ac.ru; K_Pruess@lbl.gov
RI Большов, Леонид/P-9814-2015
FU U.S. Department of Energy (DOE); U.S. Civilian Research and Development
Foundation [RG0-20101-RW40]; Institute of Nuclear Energy Safety (IBRAE)
of the Russian Academy of Sciences; RFBR [06-08-00176a, 06-08-01501a];
U.S. DOE Office of Civilian Radioactive Waste Management
[AC02-05CH11231]
FX We acknowledge support from the U.S. Department of Energy (DOE) under
U.S. Civilian Research and Development Foundation Grant Assistance
Program Project RG0-20101-RW40 with the Institute of Nuclear Energy
Safety (IBRAE) of the Russian Academy of Sciences, and from RFBR
(Russian Foundation for Basic Research) under Projects 06-08-00176a and
06-08-01501a. K. Pruess also acknowledges support from the U.S. DOE
Office of Civilian Radioactive Waste Management under Contract no.
DE-AC02-05CH11231.
NR 127
TC 5
Z9 5
U1 1
U2 11
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 NOV
PY 2008
VL 7
IS 4
DI 10.2136/vzj2007.0153
PG 10
WC Environmental Sciences; Soil Science; Water Resources
SC Environmental Sciences & Ecology; Agriculture; Water Resources
GA 379GL
UT WOS:000261384600003
ER
PT J
AU Bolshov, L
Kondratenko, P
Pruess, K
AF Bolshov, Leonid
Kondratenko, Peter
Pruess, Karsten
TI Preface: Nonclassical Transport
SO VADOSE ZONE JOURNAL
LA English
DT Editorial Material
C1 [Pruess, Karsten] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Bolshov, Leonid; Kondratenko, Peter] Russian Acad Sci, Nucl Safety Inst, Moscow 117901, Russia.
RP Pruess, K (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM k_pruess@lbl.gov
RI Большов, Леонид/P-9814-2015
NR 4
TC 3
Z9 3
U1 0
U2 0
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 NOV
PY 2008
VL 7
IS 4
DI 10.2136/vzj2008.0109
PG 2
WC Environmental Sciences; Soil Science; Water Resources
SC Environmental Sciences & Ecology; Agriculture; Water Resources
GA 379GL
UT WOS:000261384600002
ER
PT J
AU Goloviznin, VM
Korotkin, IA
Pruess, K
Semenov, VN
Sorokovikova, OS
AF Goloviznin, V. M.
Korotkin, I. A.
Pruess, K.
Semenov, V. N.
Sorokovikova, O. S.
TI Stochastic Models of Solute Transport in Highly Heterogeneous Geologic
Media
SO VADOSE ZONE JOURNAL
LA English
DT Article
ID ADVECTION-DISPERSION EQUATION; FINITE-DIFFERENCE APPROXIMATIONS;
POROUS-MEDIA; ANOMALOUS DIFFUSION; NUMERICAL-SOLUTION; RANDOM-WALKS;
AQUIFER; MOMENTS; MOTION; SCALE
AB A stochastic model of anomalous diffusion was developed in which transport occurs by random motion of Brownian particles, described by distribution functions of random displacements with heavy (power-law) tails. One variant of an effective algorithm for random function generation with a power-law asymptotic and arbitrary factor of asymmetry is proposed that is based on the Gnedenko-Levy limit theorem and makes it possible to reproduce all known Levy alpha-stable fractal processes. A two-dimensional stochastic random walk algorithm has been developed that approximates anomalous diffusion with streamline-dependent and space-dependent parameters. The motivation for introducing such a type of dispersion model is the observed fact that tracers in natural aquifers spread at different super-Fickian rates in different directions. For this and other important cases, stochastic random walk models are the only known way to solve the so-called multi scaling fractional order diffusion equation with space-dependent parameters. Some comparisons of model results and field experiments are presented.
C1 [Goloviznin, V. M.; Korotkin, I. A.; Semenov, V. N.; Sorokovikova, O. S.] Russian Acad Sci, Nucl Safety Inst, Moscow 115191, Russia.
[Pruess, K.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Goloviznin, VM (reprint author), Russian Acad Sci, Nucl Safety Inst, 52 Bolshaya Tulskaya St, Moscow 115191, Russia.
EM gol@ibrae.ac.ru; K_Pruess@lbl.gov
FU U.S. Civilian Research and Development Foundation [RG0-20101-RW40];
Institute of Nuclear Energy Safety of the Russian Academy of Sciences;
Russian Foundation for Basic Research [0608-00176a, 06-08-01501a]; U.S.
DOE Office of Civilian Radioactive Waste Management [DE-AC02-05CH11231]
FX We acknowledge support from the U. S. Department of Energy ( DOE) under
the U.S. Civilian Research and Development Foundation Grant Assistance
Program, Project RG0-20101-RW40, with the Institute of Nuclear Energy
Safety of the Russian Academy of Sciences, and from the Russian
Foundation for Basic Research under Projects 0608-00176a and
06-08-01501a. Dr. Pruess also acknowledges support from the U.S. DOE
Office of Civilian Radioactive Waste Management under Contract no.
DE-AC02-05CH11231.
NR 50
TC 2
Z9 3
U1 0
U2 0
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 NOV
PY 2008
VL 7
IS 4
DI 10.2136/vzj2007.0150
PG 11
WC Environmental Sciences; Soil Science; Water Resources
SC Environmental Sciences & Ecology; Agriculture; Water Resources
GA 379GL
UT WOS:000261384600009
ER
PT J
AU Moriarty, P
AF Moriarty, Patrick
TI Database for Validation of Design Load Extrapolation Techniques
SO WIND ENERGY
LA English
DT Article
DE Loads extrapolation; aeroelastic stimulation; extreme events
AB Extrapolation techniques used for predicting long-term wind turbine loads have produced highly variable loading estimates dependent on the individual designer implementation. To reduce such variability, more precise definition and validation of these techniques ore necessary. As port of a wider effort to test loads extrapolation techniques used in wind turbine design, two data sets were created. The first data set was created as an example typical of what designers use to extrapolate loads according to wind turbine design standards. The second data set was a series of year-long simulations that could be used to quantify the accuracy of extrapolation methods. Due to the large number of simulations, care was taken not to reproduce random samplings in individual time series. Additionally, a grid computing architecture was used to run the simulations in a reasonable time frame. The wind speeds where loads were highest were identified, which varied with loading type. The identification of dominant wind speeds is important to ensure an adequate number of simulations at such speeds, which often influence extrapolated loads. In-plane loads and deflections tended to be dominated by high wind speeds near cut-out wind speed. Out-of plane loads and deflections were most influenced by winds that were near the rated wind speed. Some loads were influenced by a range of wind speeds. The loads dominated by high wind speeds had greater variability in the extreme values, which could be a reflection of the greatly varying wind and also greater sensitivity to higher energy content of the wind at such speeds. Copyright (C) 2008 John Wiley & Sons, Ltd.
C1 Natl Renewable Energy Lab, Golden, CO USA.
RP Moriarty, P (reprint author), Natl Renewable Energy Lab, Golden, CO USA.
NR 10
TC 18
Z9 19
U1 1
U2 3
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 1095-4244
J9 WIND ENERGY
JI Wind Energy
PD NOV-DEC
PY 2008
VL 11
IS 6
BP 559
EP 576
DI 10.1002/we.305
PG 18
WC Energy & Fuels; Engineering, Mechanical
SC Energy & Fuels; Engineering
GA 386QV
UT WOS:000261898600002
ER
PT J
AU Moriarty, P
AF Moriarty, Patrick
TI Safety-factor Calibration for Wind Turbine Extreme Loads
SO WIND ENERGY
LA English
DT Article
DE loads extrapolation; safety factor; extreme events
AB Proper prediction of long-term extreme values for operating wind turbine loads and deflections is a critical component of wind turbine design. Direct observations or simulations of long-term extremes are not yet available, therefore, these predictions rely on some combination of large numbers of simulations and extrapolation. Extrapolation methods themselves can hove significant uncertainty, and they also require that the wind turbine designer have a greater level of statistical expertise-factors that make the methods less attractive for industrial application. As an alternative to extrapolation, safety factors can be calibrated using techniques that allow designers to use smaller data sets. To calculate such factors, a series of simulations was used to extrapolate 50 year extreme values for a 5 MW wind turbine. Two methods ore proposed for calculating such safety factors: one based on the mean and standard deviation of extreme values, and one based on the median of extreme values. Through a process of random sampling without replacement, the safety factor based on the median of extreme values was found to be less variable and also more independent of the number of simulations. The safety factors required were as large as 1.7, or were only 1.25 if rotor thrust loads were considered the dominant design drivers. Copyright (C) 2008 John Wiley & Sons, Ltd.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Moriarty, P (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd,MS 3811, Golden, CO 80401 USA.
EM patrick_moriarty@nrel.gov
NR 10
TC 7
Z9 7
U1 1
U2 1
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 1095-4244
J9 WIND ENERGY
JI Wind Energy
PD NOV-DEC
PY 2008
VL 11
IS 6
BP 601
EP 612
DI 10.1002/we.306
PG 12
WC Energy & Fuels; Engineering, Mechanical
SC Energy & Fuels; Engineering
GA 386QV
UT WOS:000261898600005
ER
PT J
AU Lonescu, M
Bhatia, NP
Cohen, DD
Kachenko, A
Siegele, R
Marcus, MA
Fakra, S
Foran, G
AF Lonescu, M.
Bhatia, N. P.
Cohen, D. D.
Kachenko, A.
Siegele, R.
Marcus, M. A.
Fakra, S.
Foran, G.
TI X-ray absorption spectroscopy at the Ni-K edge in Stackhousia tryonii
Bailey hyperaccumulator
SO X-RAY SPECTROMETRY
LA English
DT Article
ID NICKEL HYPERACCUMULATION; THLASPI-GOESINGENSE; NUCLEAR MICROPROBE;
SEBERTIA-ACUMINATA; SPECIATION; PLANTS; HISTIDINE; LEAVES; FERN
AB Young plants of Stackhousia tryonii Bailey were exposed to 34 mM Ni kg(-1) in the form of NiSO(4) center dot 6H(2)O solution and grown under controlled glasshouse conditions fora period of 20 days. Fresh leaf, stem and root samples were analysed in vivo by micro x-ray absorption spectroscopy (XAS) at the Ni-K edge. Both x-ray absorption near edge structure and extended x-ray absorption fine structure spectra were analysed, and the resulting spectra were compared with spectra obtained from nine biologically important Ni-containing model compounds. The results revealed that the majority of leaf, stem and root Ni in the hyperaccumulator was chelated by citrate. Our results also suggest that in leaves Ni is complexed by phosphate and histidine, and in stems and roots, phytate and histidine. The XAS results provide an important physiological insight into transport, detoxification and storage of Ni in S. tryonii plants. Copyright (C) 2008 John Wiley & Sons, Ltd.
C1 [Lonescu, M.; Bhatia, N. P.; Cohen, D. D.; Siegele, R.] Australian Nucl Sci & Technol Org, Sydney, NSW, Australia.
[Kachenko, A.] Univ Sydney, Fac Agr Food & Nat Resources, Sydney, NSW 2006, Australia.
[Marcus, M. A.; Fakra, S.] Adv Light Source, Lawrence Berkeley Natl Lab, Berkeley, CA USA.
[Foran, G.] Australian Natl Beamline Facil, Tsukuba, Ibaraki, Japan.
RP Lonescu, M (reprint author), Australian Nucl Sci & Technol Org, Sydney, NSW, Australia.
EM Mihail.lonescu@ansto.gov.au
OI Cohen, David/0000-0002-1209-9234
FU Australian Synchrotron Research Program; Commonwealth of Australia
FX This work was partially supported by the Australian Synchrotron Research
Program, which is funded by the Commonwealth of Australia under the
Major National Research Facilities Program.
NR 23
TC 2
Z9 2
U1 3
U2 9
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 0049-8246
J9 X-RAY SPECTROM
JI X-Ray Spectrom.
PD NOV-DEC
PY 2008
VL 37
IS 6
BP 629
EP 634
DI 10.1002/xrs.1111
PG 6
WC Spectroscopy
SC Spectroscopy
GA 375LX
UT WOS:000261116500010
ER
PT J
AU Jonah, CD
Chemerisov, S
Long, JD
Gai, W
Jean, YC
Schrader, D
AF Jonah, Charles D.
Chemerisov, Sergey
Long, Jidong
Gai, Wei
Jean, Y. C.
Schrader, David
TI Development of the Argonne positron source APosS
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 11th Workshop on Slow Position Beam Techniques for Solids and Surfaces
CY JUL 09-13, 2007
CL Musee Sci Naturelles, Orleans, FRANCE
SP Ville Orleans, Conseil Reg Loiret, Reg Ctr, Ctr Natl Rec Sci, Commiss Energ Atom
HO Musee Sci Naturelles
DE Argonne positron source; accelerator system; converter
AB In this paper we discuss the progress at Argonne National Laboratory with the APosS. We outline possible improvements that can increase the flux of positrons by increasing the electron current on target or by modi. cation of the positron converter. We discuss some new techniques that could increase moderation efficiency and thus further increase positron flux two to three orders of magnitude by making use of modern accelerator techniques. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Jonah, Charles D.; Chemerisov, Sergey] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
[Long, Jidong; Gai, Wei] Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA.
[Jean, Y. C.] Univ Missouri, Dept Chem, Kansas City, MO USA.
[Schrader, David] Marquette Univ, Milwaukee, WI 53233 USA.
RP Jonah, CD (reprint author), Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM CDJonah@anl.gov
NR 6
TC 3
Z9 3
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD OCT 31
PY 2008
VL 255
IS 1
BP 25
EP 28
DI 10.1016/j.apsusc.2008.05.299
PG 4
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 355RV
UT WOS:000259726900005
ER
PT J
AU Xu, Y
Gao, S
Bruno, JF
Luft, BJ
Dunn, JJ
AF Xu, Yun
Gao, Simon
Bruno, John F.
Luft, Benjamin J.
Dunn, John J.
TI Rapid detection and identification of a pathogen's DNA using Phi29 DNA
polymerase
SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
LA English
DT Article
DE Phi29 DNA polymerase; Multiply-primed rolling circle amplification
ID BORRELIA-BURGDORFERI; AMPLIFICATION; REPLICATION; VIRUS
AB Zoonotic pathogens including those transmitted by insect vectors are some of the most deadly of all infectious diseases known to mankind. A number of these agents have been further weaponized and are widely recognized as being potentially significant biothreat agents. We describe a novel method based on multiply-primed rolling circle in vitro amplification for profiling genomic DNAs to permit rapid, cultivation-free differential detection and identification of circular plasmids in infectious agents. Using Phi29 DNA polymerase and a two-step priming reaction we could reproducibly detect and characterize by DNA sequencing circular DNA from Borrelia burgdorferi B31 in DNA samples containing as little as 25 pg of Borrelia DNA amongst a vast excess of human DNA. This simple technology can ultimately be adapted as a sensitive method to detect specific DNA from both known and unknown pathogens in a wide variety of complex environments. (C) 2008 Elsevier Inc. All rights reserved.
C1 [Xu, Yun; Gao, Simon; Bruno, John F.; Luft, Benjamin J.] SUNY Stony Brook, Dept Med, Stony Brook, NY 11794 USA.
[Dunn, John J.] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
RP Xu, Y (reprint author), SUNY Stony Brook, Dept Med, T-16 Room 027, Stony Brook, NY 11794 USA.
EM jbruno@notes.cc.sunysb.edu
OI Luft, Benjamin/0000-0001-9008-7004
FU NIH [U01-A156480]
FX Supported by NIH Grant U01-A156480. Studies performed at BNL were
conducted under the auspices of the United States Department of Energy.
NR 10
TC 4
Z9 4
U1 1
U2 2
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0006-291X
J9 BIOCHEM BIOPH RES CO
JI Biochem. Biophys. Res. Commun.
PD OCT 31
PY 2008
VL 375
IS 4
BP 522
EP 525
DI 10.1016/j.bbrc.2008.08.082
PG 4
WC Biochemistry & Molecular Biology; Biophysics
SC Biochemistry & Molecular Biology; Biophysics
GA 356HL
UT WOS:000259769200007
PM 18755142
ER
PT J
AU Min, QL
Wang, TH
Long, CN
Duan, MZ
AF Min, Qilong
Wang, Tianhe
Long, Charles N.
Duan, Minzheng
TI Estimating fractional sky cover from spectral measurements
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
AB A method for estimating fractional sky cover from spectral measurements has been developed. The spectral characteristics of clouds and clear-sky aerosols are utilized to partition sky fraction. As illustrated in our sensitivity study and demonstrated in real measurements, the transmittance ratio at selected wavelengths in insensitive to solar zenith angle and major atmospheric gaseous absorption. With a localized baseline procedure, retrievals of this ratio method are independent of absolute calibration and weakly sensitive to changes in cloud and aerosol optical properties. Therefore this method substantially reduces the retrieval uncertainty. The uncertainty of this method, estimated through the sensitivity study and intercomparison, is less than 10%. With globally deployed narrowband radiometers, this simple ratio method can substantially enhance the current capability for monitoring fractional sky cover.
C1 [Min, Qilong; Wang, Tianhe] SUNY Albany, Atmospher Sci Res Ctr, Albany, NY 12203 USA.
[Duan, Minzheng] Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China.
[Long, Charles N.] Pacific NW Natl Lab, Atmospher Radiat Measurement Program, Richland, WA 99352 USA.
RP Min, QL (reprint author), SUNY Albany, Atmospher Sci Res Ctr, Room L215,251 Fuller Rd, Albany, NY 12203 USA.
EM min@asrc.cestm.albany.edu
FU Office of Science (BER); U.S. Departement of Energy [DE-FH02-03ER63531];
NOAA Educational Partnership Program with Minority Serving Institutions
(EPP/MSI) [NA17AE1625, NA17AE1623]; U.S. Department of Energy; Office of
Energy Research; Office of Health and Environmental Research;
Environmental Sceinces Division
FX This research was supported by the Office of Science (BER), U.S.
Departement of Energy, Grant DE-FH02-03ER63531, and by the NOAA
Educational Partnership Program with Minority Serving Institutions
(EPP/MSI) under cooperative agreements NA17AE1625 and NA17AE1623.
Surface data were obtained from the Atmospheric Radiation Measurement
(ARM) Program sponsored by the U.S. Department of Energy, Office of
Energy Research, Office of Health and Environmental Research,
Environmental Sceinces Division.
NR 15
TC 21
Z9 22
U1 0
U2 7
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD OCT 31
PY 2008
VL 113
IS D20
AR D20208
DI 10.1029/2008JD010278
PG 6
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 368CF
UT WOS:000260598200005
ER
PT J
AU Burchell, T
Pappano, P
AF Burchell, Tim
Pappano, Pete
TI Papers from the International Nuclear Graphite Specialists Meetings
Preface
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Editorial Material
C1 [Burchell, Tim; Pappano, Pete] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Burchell, T (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, POB 2008, Oak Ridge, TN 37831 USA.
NR 0
TC 0
Z9 0
U1 2
U2 4
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 OCT 31
PY 2008
VL 381
IS 1-2
BP IX
EP IX
DI 10.1016/j.jnucmat.2008.07.037
PG 1
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 378TU
UT WOS:000261347700001
ER
PT J
AU Contescu, CI
Azad, S
Miller, D
Lance, MJ
Baker, FS
Burchell, TD
AF Contescu, Cristian I.
Azad, Samina
Miller, Doug
Lance, Michael J.
Baker, Frederick S.
Burchell, Timothy D.
TI Practical aspects for characterizing air oxidation of graphite
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 8th International Graphite Specialists Meeting (INGSM-8)
CY SEP 09-12, 2007
CL Sun City, SOUTH AFRICA
ID NATURAL GRAPHITE; NUCLEAR GRAPHITE; THERMAL-ANALYSIS; GASIFICATION;
RESISTANCE; KINETICS
AB The efforts for designing a meaningful and acceptable standard test method for characterization of kinetic parameters of air oxidation of graphite helped identify several practical issues that must be considered for the development Of Such a test. Using standard size (and shape) specimens, large enough in size to accommodate the inherent local microstructure differences between graphite samples, resulted in non-uniform oxidation profiles and preferential binder oxidation; this was not expected based on the linearity of Arrhenius plots and the (large) values of activation energy. It was found that the transition between the regimes 1 and 2 of graphite oxidation occurs gradually. depending both on the oxidation temperature and rate of oxygen supply. Nevertheless, measuring oxidation rates obtained on standard size samples provides a basis for a meaningful comparison among materials, which may serve as much needed information for predictive models. (C) 2008 Published by Elsevier B.V.
C1 [Contescu, Cristian I.; Lance, Michael J.; Baker, Frederick S.; Burchell, Timothy D.] Oak Ridge Natl Lab, UT Battelle Inc, Oak Ridge, TN 37831 USA.
[Azad, Samina; Miller, Doug] GrafTech Int Parma, Parma, OH 44130 USA.
RP Contescu, CI (reprint author), Oak Ridge Natl Lab, UT Battelle Inc, POB 2008, Oak Ridge, TN 37831 USA.
EM ccontescu@ornl.gov
RI Contescu, Cristian/E-8880-2011; Lance, Michael/I-8417-2016; Burchell,
Tim/E-6566-2017
OI Contescu, Cristian/0000-0002-7450-3722; Lance,
Michael/0000-0001-5167-5452; Burchell, Tim/0000-0003-1436-1192
NR 43
TC 25
Z9 29
U1 3
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 OCT 31
PY 2008
VL 381
IS 1-2
BP 15
EP 24
DI 10.1016/j.jnucmat.2008.07.020
PG 10
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 378TU
UT WOS:000261347700004
ER
PT J
AU Pappano, PJ
Burchell, TD
Hunn, JD
Trammell, MP
AF Pappano, P. J.
Burchell, T. D.
Hunn, J. D.
Trammell, M. P.
TI A novel approach to fabricating fuel compacts for the next generation
nuclear plant (NGNP)
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 8th International Graphite Specialists Meeting (INGSM-8)
CY SEP 09-12, 2007
CL Sun City, SOUTH AFRICA
ID REACTOR
AB The next generation nuclear plant (NGNP) is a combined complex of a very high temperature reactor (VHTR) and hydrogen production facility. The VHTR can have a prismatic or pebble bed design and is powered by TRISO fuel in the form of a fuel compact (prismatic) or pebble (pebble bed). The US is scheduled to build a demonstration VHTR at the Idaho National Laboratory site by 2020. The first step toward building of this facility is development and qualification of the fuel for the reactor. This paper summarizes the research and development efforts performed at Oak Ridge National Laboratory (ORNL) toward development of a qualified fuel compact for a VHTR. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Pappano, P. J.; Burchell, T. D.; Hunn, J. D.; Trammell, M. P.] Oak Ridge Natl Lab, Carbon Mat Technol Grp, Oak Ridge, TN 37831 USA.
RP Pappano, PJ (reprint author), Oak Ridge Natl Lab, Carbon Mat Technol Grp, 1 Bethel Valley Rd,POB 2008, Oak Ridge, TN 37831 USA.
EM pappanopj@ornl.gov
RI Burchell, Tim/E-6566-2017
OI Burchell, Tim/0000-0003-1436-1192
NR 15
TC 12
Z9 12
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 OCT 31
PY 2008
VL 381
IS 1-2
BP 25
EP 38
DI 10.1016/j.jnucmat.2008.07.032
PG 14
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 378TU
UT WOS:000261347700005
ER
PT J
AU Burchell, TD
AF Burchell, Timothy D.
TI Irradiation induced creep behavior of H-451 graphite
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 8th International Graphite Specialists Meeting (INGSM-8)
CY SEP 09-12, 2007
CL Sun City, SOUTH AFRICA
ID GRAINED ISOTROPIC GRAPHITE; FAST-NEUTRON IRRADIATION; DIMENSIONAL
CHANGES; REACTOR GRAPHITE; COEFFICIENT
AB The application of a creep model previously applied to compressive creep data for H-451 irradiated at 900 degrees C (13.7 and 20.8 MPa) has been extended to compressive creep data for H-451 irradiated at 600 degrees C (13.7 and 20.8 MPa). The basis of the creep model is discussed and the experimental data required to evaluate the terms in the creep model are reported and discussed. The model, which corrects the true (crystal) creep strain for the effect of creep on the dimensional change component of the creep specimen, is shown to be a good fit to the data. Creep strain data for H-451 graphite irradiated at 900 degrees C under a tensile stress of 6 MPa are also reported, along with the required experimental data to evaluate the terms in the creep model. The model is shown to inadequately represent the high dose (post volume turnaround) H-451 tensile creep strain data. Reasons for the models limitation are discussed and an approach to a potentially improved graphite irradiation creep model is suggested. (C) 2008 Elsevier B.V. All rights reserved.
C1 Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Burchell, TD (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, POB 2008, Oak Ridge, TN 37831 USA.
EM burchelltd@ornl.gov
RI Burchell, Tim/E-6566-2017
OI Burchell, Tim/0000-0003-1436-1192
NR 33
TC 16
Z9 16
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 OCT 31
PY 2008
VL 381
IS 1-2
BP 46
EP 54
DI 10.1016/j.jnucmat.2008.07.022
PG 9
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 378TU
UT WOS:000261347700007
ER
PT J
AU Snead, LL
Burchell, TD
Katoh, Y
AF Snead, L. L.
Burchell, T. D.
Katoh, Y.
TI Swelling of nuclear graphite and high quality carbon fiber composite
under very high irradiation temperature
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 8th International Graphite Specialists Meeting (INGSM-8)
CY SEP 09-12, 2007
CL Sun City, SOUTH AFRICA
AB The purpose of this experiment was to evaluate the dimensional change of newly proposed nuclear graphite material following high-temperature irradiation, and to compare the measured swelling with the historic nuclear graphite, H-451. Over the irradiation temperature range Studied (similar to 850-1475 degrees C) and neutron dose range (2-10 x 10(25) n/m(2) (E > 0.1 MeV)) the Graftech PCEA and SGL NBG-10 candidate nuclear graphite had similar densification to that of Great Lakes Carbon nuclear graphite H-451. In this temperature and dose range all materials remained in the densification stage. Additionally, the effect of high-temperature irradiation on the dimensional stability of high-quality carbon fiber composites was investigated. A high thermal conductivity three-dimensional carbon fiber composite, FMI-222, and a very high thermal conductivity one-dimensional carbon fiber composite MKC-1PH, were studied. Results indicate that a greater than anticipated dimensional change Occurred for these composites. Moreover, the dimensional stability of the 3D composite appears to be a strong function of the sample size chosen, thus raising the question of the appropriate size sample to use to determine irradiation-induced dimensional change for these materials. Published by Elsevier B.V.
C1 [Snead, L. L.; Burchell, T. D.; Katoh, Y.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Snead, LL (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
EM SneadLL@ORNL.gov
RI Burchell, Tim/E-6566-2017;
OI Burchell, Tim/0000-0003-1436-1192; Katoh, Yutai/0000-0001-9494-5862
NR 10
TC 26
Z9 27
U1 1
U2 14
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 OCT 31
PY 2008
VL 381
IS 1-2
BP 55
EP 61
DI 10.1016/j.jnucmat.2008.07.033
PG 7
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 378TU
UT WOS:000261347700008
ER
PT J
AU Snead, LL
AF Snead, L. L.
TI Accumulation of thermal resistance in neutron irradiated graphite
materials
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 8th International Graphite Specialists Meeting (INGSM-8)
CY SEP 09-12, 2007
CL Sun City, SOUTH AFRICA
ID CONDUCTIVITY DEGRADATION; POLYCRYSTALLINE GRAPHITE; PYROLYTIC GRAPHITE;
LOW-TEMPERATURE
AB A nuclear graphite, H451, and two high thermal conductivity graphite composites have been irradiated in the temperature range of 310-710 degrees C in the high flux isotope reactor and their thermal conductivities monitored in situ. Data were measured continuously up to a fast neutron dose of approximately 1 X 10(25) n/m(2) (E > 0.1 MeV). Data are interpreted in terms of the added thermal resistance and materials compared on this basis. Following this analysis it is shown that for the three materials studied, which have significantly different initial thermal conductivity values, the accumulation of thermal resistance is greater for the materials with lower initial thermal conductivity. Given that vacancies dominate phonon scattering at these irradiation temperatures and dose levels, these data clearly indicate that materials of higher perfection have a slower rate of stable vacancy accumulation during irradiation. Published by Elsevier B.V.
C1 Oak Ridge Natl Lab, UT Battele, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Snead, LL (reprint author), Oak Ridge Natl Lab, UT Battele, Div Mat Sci & Technol, POB 2008, Oak Ridge, TN 37831 USA.
EM sneadll@ornl.gov
NR 25
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 OCT 31
PY 2008
VL 381
IS 1-2
BP 76
EP 82
DI 10.1016/j.jnucmat.2008.07.017
PG 7
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 378TU
UT WOS:000261347700011
ER
PT J
AU McDuffee, JL
Burchell, TD
Heatherly, DW
Thoms, KR
AF McDuffee, J. L.
Burchell, T. D.
Heatherly, D. W.
Thoms, K. R.
TI Experimental plan and design of two experiments for graphite irradiation
at temperatures up to 1500 degrees C in the target region of the high
flux isotope reactor
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 8th International Graphite Specialists Meeting (INGSM-8)
CY SEP 09-12, 2007
CL Sun City, SOUTH AFRICA
AB Two irradiation capsules have been designed for the target region of the high flux isotope reactor (HFIR). The objective is to provide dimensional change and physical property data for four candidate next generation nuclear plant (NGNP) graphites. The capsules will reach peak doses of similar to 1.59 and similar to 4.76 dpa, respectively, at temperatures of 900, 1200, and 1500 degrees C. (C) 2008 Elsevier B.V. All rights reserved.
C1 [McDuffee, J. L.; Burchell, T. D.; Heatherly, D. W.; Thoms, K. R.] Oak Ridge Natl Lab, UT Battelle Inc, Oak Ridge, TN 37831 USA.
RP McDuffee, JL (reprint author), Oak Ridge Natl Lab, UT Battelle Inc, POB 2008, Oak Ridge, TN 37831 USA.
EM mcduffeej@ornl.gov
RI Burchell, Tim/E-6566-2017
OI Burchell, Tim/0000-0003-1436-1192
NR 5
TC 1
Z9 1
U1 1
U2 5
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 OCT 31
PY 2008
VL 381
IS 1-2
BP 114
EP 118
DI 10.1016/j.jnucmat.2008.07.030
PG 5
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 378TU
UT WOS:000261347700016
ER
PT J
AU McDuffee, JL
Burchell, TD
Heatherly, DW
Thoms, KR
AF McDuffee, J. L.
Burchell, T. D.
Heatherly, D. W.
Thoms, K. R.
TI Preliminary design of a graphite irradiation tensile creep experiment in
the target region of the high flux isotope reactor
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 8th International Graphite Specialists Meeting (INGSM-8)
CY SEP 09-12, 2007
CL Sun City, SOUTH AFRICA
AB Up to four irradiation tensile creep tests are planned for the target region of the high flux isotope reactor on two graphite grades: PCEA and NBG-18. The initial experiment is designed for an irradiation temperature of 600 degrees C and at fluences between 1 x 10(22) n/cm(2) and 1.4 x 10(22) n/cm(2) (E > 50 keV). (C) 2008 Elsevier B.V. All rights reserved.
C1 [McDuffee, J. L.; Burchell, T. D.; Heatherly, D. W.; Thoms, K. R.] Oak Ridge Natl Lab, UT Battelle Inc, Oak Ridge, TN 37831 USA.
RP McDuffee, JL (reprint author), Oak Ridge Natl Lab, UT Battelle Inc, POB 2008, Oak Ridge, TN 37831 USA.
EM mcduffeej@ornl.gov
RI Burchell, Tim/E-6566-2017
OI Burchell, Tim/0000-0003-1436-1192
NR 4
TC 4
Z9 4
U1 1
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 OCT 31
PY 2008
VL 381
IS 1-2
BP 119
EP 123
DI 10.1016/j.jnucmat.2008.07.031
PG 5
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 378TU
UT WOS:000261347700017
ER
PT J
AU Wang, JAJ
Liu, KC
AF Wang, Jy-An John
Liu, Ken C.
TI An innovative technique for evaluating fracture toughness of graphite
materials
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT 8th International Graphite Specialists Meeting (INGSM-8)
CY SEP 09-12, 2007
CL Sun City, SOUTH AFRICA
ID CRACK
AB Spiral notch torsion fracture toughness test (SNTT) was developed recently to measure the intrinsic fracture toughness (K(IC)) of structural materials. The SNTT system operates by applying pure torsion to Uniform cylindrical specimens with a notch line that spirals around the specimen at a 45 degrees pitch. The K(IC) Values are obtained with the aid of a three-dimensional finite-element computer code, TOR3D-KIC. The SNTT method is uniquely suitable for testing a wide variety of materials used extensively in pressure vessel and piping structural components and weldments, including others Such as ceramics, their composites, and concrete. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Wang, Jy-An John; Liu, Ken C.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Wang, JAJ (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM wangja@ornl.gov
OI Wang, Jy-An/0000-0003-2402-3832
NR 18
TC 14
Z9 15
U1 0
U2 2
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 OCT 31
PY 2008
VL 381
IS 1-2
BP 177
EP 184
DI 10.1016/j.jnucmat.2008.07.034
PG 8
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 378TU
UT WOS:000261347700026
ER
PT J
AU Sihver, L
Matthia, D
Koi, T
Mancusi, D
AF Sihver, L.
Matthiae, D.
Koi, T.
Mancusi, D.
TI Dose calculations at high altitudes and in deep space with GEANT4 using
BIC and JQMD models for nucleus-nucleus reactions
SO NEW JOURNAL OF PHYSICS
LA English
DT Article
ID ACCURATE UNIVERSAL PARAMETERIZATION; ABSORPTION CROSS-SECTIONS; QUANTUM
MOLECULAR-DYNAMICS; MONTE-CARLO SIMULATIONS; HEAVY-ION COLLISIONS;
RADIATION ENVIRONMENT; ENERGY-RANGE; CODE; PHITS; PARTICLE
AB Radiation exposure of aircrew is more and more recognized as an occupational hazard. The ionizing environment at standard commercial aircraft flight altitudes consists mainly of secondary particles, of which the neutrons give a major contribution to the dose equivalent. Accurate estimations of neutron spectra in the atmosphere are therefore essential for correct calculations of aircrew doses. Energetic solar particle events (SPE) could also lead to significantly increased dose rates, especially at routes close to the North Pole, e. g. for flights between Europe and USA. It is also well known that the radiation environment encountered by personnel aboard low Earth orbit (LEO) spacecraft or aboard a spacecraft traveling outside the Earth's protective magnetosphere is much harsher compared with that within the atmosphere since the personnel are exposed to radiation from both galactic cosmic rays (GCR) and SPE. The relative contribution to the dose from GCR when traveling outside the Earth's magnetosphere, e. g. to the Moon or Mars, is even greater, and reliable and accurate particle and heavy ion transport codes are essential to calculate the radiation risks for both aircrew and personnel on spacecraft. We have therefore performed calculations of neutron distributions in the atmosphere, total dose equivalents, and quality factors at different depths in a water sphere in an imaginary spacecraft during solar minimum in a geosynchronous orbit. The calculations were performed with the GEANT4 Monte Carlo (MC) code using both the binary cascade (BIC) model, which is part of the standard GEANT4 package, and the JQMD model, which is used in the particle and heavy ion transport code PHITS GEANT4.
C1 [Sihver, L.; Mancusi, D.] Chalmers, S-41296 Gothenburg, Sweden.
[Sihver, L.] Roanoke Coll, Salem, VA 24153 USA.
[Matthiae, D.] German Aerosp Ctr, Cologne, Germany.
[Koi, T.] SLAC, Stanford, CA USA.
RP Sihver, L (reprint author), Chalmers, S-41296 Gothenburg, Sweden.
EM sihver@chalmers.se
OI Mancusi, Davide/0000-0002-2518-8228; Matthia, Daniel/0000-0003-1507-0143
NR 66
TC 9
Z9 9
U1 1
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1367-2630
J9 NEW J PHYS
JI New J. Phys.
PD OCT 31
PY 2008
VL 10
AR 105019
DI 10.1088/1367-2630/10/10/105019
PG 19
WC Physics, Multidisciplinary
SC Physics
GA 370JY
UT WOS:000260759700001
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, C
Cuevas, J
Culbertson, R
Cully, JC
Dagenhart, D
Datta, M
Davies, T
Barbaro, P
Cecco, S
Deisher, A
Lorenzo, G
Dell'Orso, M
Deluca, C
Demortier, L
Deng, J
Deninno, M
Derwent, PF
Giovanni, GP
Dionisi, C
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, J
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, 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
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-Ballaren, 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, P
Muelmenstaedt, 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, S
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
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Scheidle, T
Schlabach, P
Schmidt, A
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Schmidt, MA
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Schmitt, M
Schwarz, T
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Scott, AL
Scribano, A
Scuri, F
Sedov, A
Seidel, S
Seiya, Y
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Sfyrla, A
Shalhout, SZ
Shears, T
Shepard, PF
Sherman, D
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Shiraishi, S
Shochet, M
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Shreyber, I
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Slaughter, AJ
Slaunwhite, J
Sliwa, K
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Yun, JC
Zanello, L
Zanetti, A
Zaw, I
Zhang, X
Zheng, Y
Zucchelli, S
AF Aaltonen, T.
Adelman, J.
Akimoto, T.
Albrow, M. G.
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.
Azzurri, P.
Badgett, W.
Barbaro-Galtieri, A.
Barnes, V. E.
Barnett, B. A.
Bartsch, V.
Bauer, G.
Beauchemin, P. -H.
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, 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.
Burkett, K.
Busetto, G.
Bussey, P.
Buzatu, A.
Byrum, K. L.
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, 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.
Ciobanu, C. I.
Ciocci, M. A.
Clark, A.
Clark, D.
Compostella, G.
Convery, M. E.
Conway, J.
Copic, K.
Cordelli, M.
Cortiana, G.
Cox, D. J.
Crescioli, F.
Cuenca Almenar, C.
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 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.
Franklin, M.
Freeman, J. C.
Furic, I.
Gallinaro, M.
Galyardt, J.
Garberson, F.
Garcia, J. E.
Garfinkel, A. F.
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.
Guimaraes da Costa, J.
Gunay-Unalan, Z.
Haber, C.
Hahn, K.
Hahn, S. R.
Halkiadakis, E.
Han, B. -Y.
Han, J. Y.
Handler, R.
Happacher, F.
Hara, K.
Hare, D.
Hare, M.
Harper, S.
Harr, R. F.
Harris, R. M.
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, C. S.
Hirschbuehl, D.
Hocker, A.
Hou, S.
Houlden, M.
Hsu, S. -C.
Huffman, B. T.
Hughes, R. E.
Husemann, U.
Huston, J.
Incandela, J.
Introzzi, G.
Iori, M.
Ivanov, A.
James, E.
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.
Keung, J.
Khotilovich, V.
Kilminster, B.
Kim, D. H.
Kim, H. S.
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.
Koay, S. A.
Kondo, K.
Kong, D. J.
Konigsberg, J.
Korytov, A.
Kotwal, A. V.
Kreps, M.
Kroll, J.
Krop, D.
Krumnack, N.
Kruse, M.
Krutelyov, V.
Kubo, T.
Kuhr, T.
Kulkarni, N. P.
Kurata, M.
Kusakabe, Y.
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.
Lu, R. -S.
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, C. P.
Martin, A.
Martin, V.
Martinez, M.
Martinez-Ballaren, R.
Maruyama, T.
Mastrandrea, P.
Masubuchi, T.
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.
Morlok, J.
Movilla Fernandez, P.
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.
Neu, C.
Neubauer, M. 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.
Pagan Griso, S.
Pagliarone, C.
Palencia, E.
Papadimitriou, V.
Papaikonomou, A.
Paramonov, A. A.
Parks, B.
Pashapour, S.
Patrick, J.
Pauletta, G.
Paulini, M.
Paus, C.
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.
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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.
Zaw, I.
Zhang, X.
Zheng, Y.
Zucchelli, S.
TI Search for Large Extra Dimensions in Final States Containing One Photon
or Jet and Large Missing Transverse Energy Produced in pp Collisions at
s=1.96 TeV
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID COLLIDERS; PHYSICS
AB We present the results of searches for large extra dimensions in samples of events with large missing transverse energy E(T) and either a photon or a jet produced in pp collisions at s=1.96 TeV collected with the Collider Detector at Fermilab II. For gamma+E(T) and jet+E(T) candidate samples corresponding to 2.0 and 1.1 fb(-1) of integrated luminosity, respectively, we observe good agreement with standard model expectations and obtain a combined lower limit on the fundamental parameter of the large extra dimensions model M(D) as a function of the number of extra dimensions in the model.
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[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.; Yu, G. B.] Univ Rochester, Rochester, NY 14627 USA.
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RP Aaltonen, T (reprint author), Acad Sinica, Inst Phys, Taipei 11529, Taiwan.
RI Gorelov, Igor/J-9010-2015; Prokoshin, Fedor/E-2795-2012; Canelli,
Florencia/O-9693-2016; Moon, Chang-Seong/J-3619-2014; Scodellaro,
Luca/K-9091-2014; Paulini, Manfred/N-7794-2014; Russ, James/P-3092-2014;
unalan, zeynep/C-6660-2015; Lazzizzera, Ignazio/E-9678-2015; 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; Annovi,
Alberto/G-6028-2012; Ivanov, Andrew/A-7982-2013; St.Denis,
Richard/C-8997-2012; Warburton, Andreas/N-8028-2013; Kim,
Soo-Bong/B-7061-2014; Lysak, Roman/H-2995-2014; 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
OI Gorelov, Igor/0000-0001-5570-0133; Prokoshin, Fedor/0000-0001-6389-5399;
Canelli, Florencia/0000-0001-6361-2117; Gallinaro,
Michele/0000-0003-1261-2277; Turini, Nicola/0000-0002-9395-5230; Moon,
Chang-Seong/0000-0001-8229-7829; Scodellaro, Luca/0000-0002-4974-8330;
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; Introzzi,
Gianluca/0000-0002-1314-2580; Annovi, Alberto/0000-0002-4649-4398;
Ivanov, Andrew/0000-0002-9270-5643; Warburton,
Andreas/0000-0002-2298-7315; Ruiz, Alberto/0000-0002-3639-0368; Punzi,
Giovanni/0000-0002-8346-9052
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;
Bundesministerium fur Bildung und Forschung, Germany; Korean Science and
Engineering Foundation; Korean Research Foundation; Science and
Technology Facilities Council; Royal Society, U. K.; 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, U. K.; 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 15
TC 57
Z9 57
U1 1
U2 7
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 OCT 31
PY 2008
VL 101
IS 18
AR 181602
DI 10.1103/PhysRevLett.101.181602
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 367TD
UT WOS:000260574600019
PM 18999815
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
Bloch, D
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
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
Motta, H
Das, A
Davies, G
De, K
Jong, SJ
De La Cruz-Burelo, E
De Oliveira Martins, C
Degenhardt, JD
Deliot, F
Demarteau, M
Demina, R
Denisov, D
Denisov, SP
Desai, S
Diehl, HT
Diesburg, M
Dominguez, A
Dong, H
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
Gele, D
Geng, W
Gerber, CE
Gershtein, Y
Gillberg, D
Ginther, G
Gollub, N
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
Hauser, R
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
Hoeth, H
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
Jonckheere, A
Jonsson, P
Juste, A
Kajfasz, E
Kalk, JM
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, R
Lyon, AL
Maciel, AKA
Mackin, D
Madaras, RJ
Mattig, P
Magass, C
Magerkurth, A
Mal, PK
Malbouisson, HB
Malik, S
Malyshev, VL
Mao, HS
Maravin, Y
Martin, B
McCarthy, R
Melnitchouk, A
Mendoza, L
Mercadante, PG
Merkin, M
Merritt, KW
Meyer, A
Meyer, J
Millet, T
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, GJY
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
Silva, WLP
Prosper, HB
Protopopescu, S
Qian, J
Quadt, A
Quinn, B
Rakitine, A
Rangel, MS
Ranjan, K
Ratoff, PN
Renkel, P
Reucroft, S
Rich, P
Rieger, J
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
Steele, 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
Tamburello, P
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
Vaupel, M
Verdier, P
Vertogradov, LS
Verzocchi, M
Vilanova, D
Villeneuve-Seguier, F
Vint, P
Vokac, P
Von Toerne, E
Voutilainen, M
Wagner, R
Wahl, HD
Wang, L
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
Wilson, GW
Wimpenny, SJ
Wobisch, M
Wood, DR
Wyatt, TR
Xie, Y
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.
Bloch, D.
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.
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.
De Oliveira Martins, C.
Degenhardt, J. D.
Deliot, F.
Demarteau, M.
Demina, R.
Denisov, D.
Denisov, S. P.
Desai, S.
Diehl, H. T.
Diesburg, M.
Dominguez, A.
Dong, H.
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.
Gele, D.
Geng, W.
Gerber, C. E.
Gershtein, Y.
Gillberg, D.
Ginther, G.
Gollub, N.
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.
Hauser, R.
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.
Hoeth, H.
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.
Jonckheere, A.
Jonsson, P.
Juste, A.
Kajfasz, E.
Kalk, J. M.
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, 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.
Mao, H. S.
Maravin, Y.
Martin, B.
McCarthy, R.
Melnitchouk, A.
Mendoza, L.
Mercadante, P. G.
Merkin, M.
Merritt, K. W.
Meyer, A.
Meyer, J.
Millet, T.
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.
Reucroft, S.
Rich, P.
Rieger, J.
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.
Steele, 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.
Tamburello, P.
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.
Vaupel, M.
Verdier, P.
Vertogradov, L. S.
Verzocchi, M.
Vilanova, D.
Villeneuve-Seguier, F.
Vint, P.
Vokac, P.
Von Toerne, E.
Voutilainen, M.
Wagner, R.
Wahl, H. D.
Wang, L.
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.
Wilson, G. W.
Wimpenny, S. J.
Wobisch, M.
Wood, D. R.
Wyatt, T. R.
Xie, Y.
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.
TI Precise Measurement of the Top-Quark Mass from lepton plus jets Events
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DETECTOR
AB We measure the mass of the top quark using top-quark pair candidate events in the lepton+jets channel from data corresponding to 1 fb(-1) of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron collider. We use a likelihood technique that reduces the jet energy scale uncertainty by combining an in situ jet energy calibration with the independent constraint on the jet energy scale (JES) from the calibration derived using photon+jets and dijet samples. We find the mass of the top quark to be 171.5 +/- 1.8(stat.+JES)+/- 1.1(syst.) GeV.
C1 [Abazov, V. M.; Alexeev, G. D.; Alton, A.; Kharzheev, Y. M.; Malyshev, V. L.; Tokmenin, V. V.; Vertogradov, L. S.; Yatsunenko, Y. A.] Joint Inst Nucl Res, Dubna, Russia.
[Piegaia, R.; Tanasijczuk, A.] Univ Buenos Aires, Buenos Aires, DF, Argentina.
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[Gregores, E. M.; Han, L.] 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.
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[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.
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[Kupco, A.; Lokajicek, M.] Acad Sci Czech Republic, Inst Phys, Ctr Particle Phys, Prague, Czech Republic.
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[Bertram, I.; Borissov, G.; Burdin, S.; Fox, H.; Love, P.; Rakitine, A.; Ratoff, P. N.; Sopczak, A.] Univ Lancaster, Lancaster, England.
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[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.; Tamburello, P.; Varnes, E. W.] Univ Arizona, Tucson, AZ 85721 USA.
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[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.; Lima, J. G. R.; Lincoln, D.; Lipton, R.; Lyon, A. L.; Mao, H. S.; 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.
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[Abolins, M.; Benitez, J. A.; Brock, R.; Dyer, J.; Edmunds, D.; Geng, W.; Hall, I.; Hauser, R.; 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.; Dominguez, A.; Eads, M.; Malik, S.; Snow, G. R.] Univ Nebraska, Lincoln, NE 68588 USA.
[Haley, J.; Schwartzman, A.; Tully, C.; Voutilainen, M.; Wagner, R.] Princeton Univ, Princeton, NJ 08544 USA.
[Iashvili, I.; Kharchilava, A.; Kumar, A.; Strang, M. A.] SUNY Buffalo, Buffalo, NY 14260 USA.
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RP Abazov, VM (reprint author), Joint Inst Nucl Res, Dubna, Russia.
RI Fisher, Wade/N-4491-2013; Ancu, Lucian Stefan/F-1812-2010; Alves,
Gilvan/C-4007-2013; Deliot, Frederic/F-3321-2014; Sharyy,
Viatcheslav/F-9057-2014; Kupco, Alexander/G-9713-2014; 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; Mundim,
Luiz/A-1291-2012; Boos, Eduard/D-9748-2012; bu, xuebing/D-1121-2012;
Mercadante, Pedro/K-1918-2012; Yip, Kin/D-6860-2013; De,
Kaushik/N-1953-2013; Novaes, Sergio/D-3532-2012; Merkin,
Mikhail/D-6809-2012; Leflat, Alexander/D-7284-2012; Dudko,
Lev/D-7127-2012; Perfilov, Maxim/E-1064-2012; Shivpuri, R K/A-5848-2010;
Gutierrez, Phillip/C-1161-2011
OI Belanger-Champagne, Camille/0000-0003-2368-2617; 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; Mundim,
Luiz/0000-0001-9964-7805; Yip, Kin/0000-0002-8576-4311; De,
Kaushik/0000-0002-5647-4489; Novaes, Sergio/0000-0003-0471-8549; Dudko,
Lev/0000-0002-4462-3192;
NR 13
TC 19
Z9 19
U1 0
U2 4
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 OCT 31
PY 2008
VL 101
IS 18
AR 182001
DI 10.1103/PhysRevLett.101.182001
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 367TD
UT WOS:000260574600022
ER
PT J
AU Abazov, VM
Abbott, B
Abolins, M
Acharya, BS
Adams, M
Adams, T
Aguilo, E
Ahn, SH
Ahsan, M
Alexeev, GD
Alkhazov, G
Alton, A
Alverson, G
Alves, GA
Anastasoaie, M
Ancu, LS
Andeen, T
Anderson, S
Andrieu, B
Anzelc, MS
Aoki, M
Arnoud, Y
Arov, M
Arthaud, M
Askew, A
Asman, B
Jesus, ACSA
Atramentov, O
Avila, C
Badaud, F
Baden, A
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
Bloch, D
Bloom, K
Boehnlein, A
Boline, D
Bolton, TA
Boos, EE
Borissov, G
Bose, T
Brandt, A
Brock, R
Brooijmans, G
Bross, A
Brown, D
Buchanan, NJ
Buchholz, D
Buehler, M
Buescher, V
Bunichev, V
Burdin, S
Burke, S
Burnett, TH
Buszello, CP
Butler, JM
Calfayan, P
Calvet, S
Cammin, J
Carvalho, W
Casey, BCK
Castilla-Valdez, H
Chakrabarti, S
Chakraborty, D
Chan, K
Chan, KM
Chandra, A
Charles, F
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
Cutts, D
Cwiok, M
Motta, H
Das, A
Davies, G
De, K
Jong, SJ
La Cruz-Burelo, E
Martins, CO
Degenhardt, JD
Deliot, F
Demarteau, M
Demina, R
Denisov, D
Denisov, SP
Desai, S
Diehl, HT
Diesburg, M
Dominguez, A
Dong, H
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
Gallas, E
Garcia, C
Garcia-Bellido, A
Gavrilov, V
Gay, P
Geist, W
Gele, D
Gerber, CE
Gershtein, Y
Gillberg, D
Ginther, G
Gollub, N
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
Hauser, R
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
Hoeth, H
Hohlfeld, M
Hong, SJ
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
Jonckheere, A
Jonsson, P
Juste, A
Kajfasz, E
Kalk, JM
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
Krop, D
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
Leveque, J
Li, J
Li, L
Li, QZ
Lietti, SM
Lima, JGR
Lincoln, D
Linnemann, J
Lipaev, VV
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Slattery, P
Smirnov, D
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Snow, J
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Soldner-Rembold, S
Sonnenschein, L
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Sosebee, M
Soustruznik, K
Spurlock, B
Stark, J
Steele, J
Stolin, V
Stoyanova, DA
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Stutte, L
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Tamburello, P
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Taylor, W
Temple, J
Tiller, B
Tissandier, F
Titov, M
Tokmenin, VV
Toole, T
Torchiani, I
Trefzger, T
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
Vaupel, M
Verdier, P
Vertogradov, LS
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Vint, P
Vokac, P
Toerne, E
Voutilainen, M
Wagner, R
Wahl, HD
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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
Wilson, GW
Wimpenny, SJ
Wobisch, M
Wood, DR
Wyatt, TR
Xie, Y
Yacoob, S
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Park, S. K.
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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.
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Pope, B. G.
Popov, A. V.
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Prado da Silva, W. L.
Prosper, H. B.
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Quinn, B.
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Rangel, M. S.
Ranjan, K.
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Rijssenbeek, M.
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Rizatdinova, F.
Robinson, S.
Rodrigues, R. F.
Rominsky, M.
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Rubinov, P.
Ruchti, R.
Safronov, G.
Sajot, G.
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Sanders, M. P.
Sanghi, B.
Santoro, A.
Savage, G.
Sawyer, L.
Scanlon, T.
Schaile, D.
Schamberger, R. D.
Scheglov, Y.
Schellman, H.
Schliephake, T.
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.
Soldner-Rembold, S.
Sonnenschein, L.
Sopczak, A.
Sosebee, M.
Soustruznik, K.
Spurlock, B.
Stark, J.
Steele, J.
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Strauss, M.
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Strom, D.
Stutte, L.
Sumowidagdo, S.
Svoisky, P.
Sznajder, A.
Tamburello, P.
Tanasijczuk, A.
Taylor, W.
Temple, J.
Tiller, B.
Tissandier, F.
Titov, M.
Tokmenin, V. V.
Toole, T.
Torchiani, I.
Trefzger, T.
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.
Vaupel, M.
Verdier, P.
Vertogradov, L. S.
Verzocchi, M.
Villeneuve-Seguier, F.
Vint, P.
Vokac, P.
Von Toerne, E.
Voutilainen, M.
Wagner, R.
Wahl, H. D.
Wang, L.
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.
Wilson, G. W.
Wimpenny, S. J.
Wobisch, M.
Wood, D. R.
Wyatt, T. R.
Xie, Y.
Yacoob, S.
Yamada, R.
Yan, M.
Yasuda, T.
Yatsunenko, Y. A.
Yip, K.
Yoo, H. D.
Youn, S. W.
Yu, J.
Zeitnitz, C.
Zhao, T.
Zhou, B.
Zhu, J.
Zielinski, M.
Zieminska, D.
Zieminski, A.
Zivkovic, L.
Zutshi, V.
Zverev, E. G.
TI Measurement of the Polarization of the Upsilon(1S) and Upsilon(2S)
States in pp Collisions at s=1.96 TeV
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID OCTET QUARKONIA PRODUCTION; PHYSICS
AB We present a study of the polarization of the Upsilon(1S) and Upsilon(2S) states using a 1.3 fb(-1) data sample collected by the D0 experiment in 2002-2006 during run II of the Fermilab Tevatron Collider. We measure the polarization parameter alpha=(sigma(T)-2 sigma(L))/(sigma(T)+2 sigma(L)), where sigma(T) and sigma(L) are the transversely and longitudinally polarized components of the production cross section, as a function of the transverse momentum (p(T)(Upsilon)) for the Upsilon(1S) and Upsilon(2S). Significant p(T)(Upsilon)-dependent longitudinal polarization is observed for the Upsilon(1S). A comparison with theoretical models is presented.
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[Piegaia, R.; Tanasijczuk, A.] Univ Buenos Aires, Buenos Aires, DF, Argentina.
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[Biscarat, C.; Grenier, G.; Kurca, T.; Lebrun, P.; Millet, T.; Muanza, G. S.; 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.; Trefzger, T.; Weber, G.] 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.
[Hoeth, H.; Maettig, P.; Peters, Y.; Schliephake, T.; Vaupel, M.; 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.; Ranjan, K.; Shivpuri, R. K.] Univ Delhi, Delhi 110007, India.
[Acharya, B. S.; Banerjee, P.; Banerjee, S.; Dugad, S. R.; Mondal, N. K.] Tata Inst Fundamental Res, Mumbai 400005, Maharashtra, India.
[Cwiok, M.; Gruenewald, M. W.] Univ Coll Dublin, Dublin 2, Ireland.
[Ahn, S. H.; Hong, S. J.; Kim, T. J.; Park, S. K.] Korea Univ, Korea Detector Lab, Seoul, South Korea.
[Choi, S.] Sungkyunkwan Univ, Suwon, South Korea.
[Castilla-Valdez, H.; 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.] Univ Amsterdam, NIKHEF, Amsterdam, Netherlands.
[Hegeman, J. G.; Houben, P.; van den Berg, P. J.; van Leeuwen, W. M.] NIKHEF, FOM Inst, Amsterdam, Netherlands.
[Anastasoaie, M.; Ancu, L. S.; de Jong, S. J.; Filthaut, F.; Galea, C. F.; Naumann, N. A.] Radboud Univ Nijmegen, NIKHEF, NL-6525 ED Nijmegen, Netherlands.
[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.; Gollub, N.; Strandberg, S.] Lund Univ, Lund, Sweden.
[Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, S.] Stockholm Univ, S-10691 Stockholm, Sweden.
[Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, S.] Royal Inst Technol, Stockholm, Sweden.
[Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, S.] Uppsala Univ, Uppsala, Sweden.
[Bertram, I.; Borissov, G.; Burdin, S.; Fox, H.; Love, P.; Rakitine, A.; Ratoff, P. N.; Sopczak, A.] Univ Lancaster, Lancaster, England.
[Bauer, D.; Beuselinck, R.; Blekman, F.; Buszello, C. P.; Christoudias, T.; 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.; Soldner-Rembold, S.; Wyatt, T. R.] Univ Manchester, Manchester, Lancs, England.
[Anderson, S.; Burke, S.; Cheu, E.; Das, A.; Johns, K.; Leveque, J.; Tamburello, P.; Temple, J.; 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.; 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.; 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.; Gallas, E.; 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.; Mao, H. S.; 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.; Chakraborty, D.; 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.; Krop, D.; Parua, N.; Rieger, J.; 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.; Svoisky, P.; 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.; Ferapontov, A. V.; Maravin, Y.; Onoprienko, D.; Shamim, M.; Von Toerne, E.] Kansas State Univ, Manhattan, KS 66506 USA.
[Arov, M.; Greenwood, Z. D.; Kalk, J. M.; Sawyer, L.; Steele, J.; Wobisch, M.] Louisiana Tech Univ, Ruston, LA 71272 USA.
[Baden, A.; Eno, S.; Hadley, N. J.; Jarvis, C.; Toole, T.; Wang, L.; Wetstein, M.; Yan, 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.; Reucroft, S.; Wood, D. R.] Northeastern Univ, Boston, MA 02115 USA.
[Alton, A.; De La Cruz-Burelo, E.; Degenhardt, J. D.; Magerkurth, A.; Neal, H. A.; Qian, J.; Strandberg, J.; Zhou, B.] Univ Michigan, Ann Arbor, MI 48109 USA.
[Abolins, M.; Benitez, J. A.; Brock, R.; Dyer, J.; Edmunds, D.; Hall, I.; Hauser, R.; 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.; Dominguez, A.; Eads, M.; Malik, S.; Snow, G. R.] Univ Nebraska, Lincoln, NE 68588 USA.
[Haley, J.; Schwartzman, A.; Tully, C.; Voutilainen, M.; 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.; Ginther, G.; Harel, A.; Slattery, P.; Zielinski, M.] Univ Rochester, Rochester, NY 14627 USA.
[Dong, H.; 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.; Christofek, L.; 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.; Cooke, M.; Corcoran, M.; Mackin, D.; Padley, P.; Pawloski, G.] Rice Univ, Houston, TX 77005 USA.
[Brown, D.; Buehler, M.; Hirosky, R.] Univ Virginia, Charlottesville, VA 22901 USA.
[Burnett, T. H.; Garcia-Bellido, A.; Goussiou, A.; Lubatti, H. J.; Mal, P. K.; Watts, G.; Zhao, T.] Univ Washington, Seattle, WA 98195 USA.
RP Abazov, VM (reprint author), Joint Inst Nucl Res, Dubna, Russia.
RI Merkin, Mikhail/D-6809-2012; Perfilov, Maxim/E-1064-2012; De,
Kaushik/N-1953-2013; Fisher, Wade/N-4491-2013; Ancu, Lucian
Stefan/F-1812-2010; Alves, Gilvan/C-4007-2013; Santoro,
Alberto/E-7932-2014; Deliot, Frederic/F-3321-2014; Sharyy,
Viatcheslav/F-9057-2014; Kupco, Alexander/G-9713-2014; 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; Shivpuri, R
K/A-5848-2010; Gutierrez, Phillip/C-1161-2011; Dudko, Lev/D-7127-2012;
Leflat, Alexander/D-7284-2012; Boos, Eduard/D-9748-2012; Novaes,
Sergio/D-3532-2012; Mercadante, Pedro/K-1918-2012; Mundim,
Luiz/A-1291-2012; Yip, Kin/D-6860-2013
OI 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; Dudko,
Lev/0000-0002-4462-3192; Novaes, Sergio/0000-0003-0471-8549; Mundim,
Luiz/0000-0001-9964-7805; Yip, Kin/0000-0002-8576-4311
FU DOE and NSF (USA); CEA and CNRS/IN2P3 (France); FASI, Rosatom and RFBR
(Russia); CNPq; FAPERJ; FAPESP; FUNDUNESP (Brazil); DAE and DST (India);
Colciencias (Colombia); CONACyT (Mexico); KRF and 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); Swedish Research
Council (Sweden); CAS; CNSF (China); Alexander von Humboldt Foundation
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.
NR 20
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
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J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD OCT 31
PY 2008
VL 101
IS 18
AR 182004
DI 10.1103/PhysRevLett.101.182004
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 367TD
UT WOS:000260574600025
PM 18999821
ER
PT J
AU Fu, GY
AF Fu, G. Y.
TI Energetic-Particle-Induced Geodesic Acoustic Mode
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID N=0 CHIRPING MODE; EXPLANATION; DYNAMICS; PLASMAS
AB A new energetic particle-induced geodesic acoustic mode (EGAM) is shown to exist. The mode frequency and mode structure are determined nonperturbatively by energetic particle kinetic effects. In particular the EGAM frequency is found to be substantially lower than the standard GAM frequency. The radial mode width is determined by the energetic particle drift orbit width and can be fairly large for high energetic particle pressure and large safety factor. These results are consistent with the recent experimental observation of the beam-driven n=0 mode in DIII-D.
C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Fu, GY (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM fu@pppl.gov
FU U. S. Department of Energy [DE-AC02-76CH03073]
FX This work is supported by the U. S. Department of Energy under
DE-AC02-76CH03073. The author thanks Dr. R. Nazikian, Dr. H. L. Berk,
and Dr. G. Kramer for stimulating discussions. In particular, the author
is indebted to Dr. R. Nazikian for sharing unpublished experimental data
from DIII-D which motivated this work, to Dr. H. L. Berk for reading the
manuscript and for suggestions on stability threshold of EGAM, and to
Dr. G. Kramer for calculating the GAM frequency using the NOVA code.
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
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J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD OCT 31
PY 2008
VL 101
IS 18
AR 185002
DI 10.1103/PhysRevLett.101.185002
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 367TD
UT WOS:000260574600040
PM 18999836
ER
PT J
AU Horner, DA
Miyabe, S
Rescigno, TN
McCurdy, CW
Morales, F
Martin, F
AF Horner, D. A.
Miyabe, S.
Rescigno, T. N.
McCurdy, C. W.
Morales, F.
Martin, F.
TI Classical Two-Slit Interference Effects in Double Photoionization of
Molecular Hydrogen at High Energies
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DOUBLE-SLIT; BREAKUP; H-2; N-2
AB Recent experiments on double photoionization of H-2 with photon energies between 160 and 240 eV have revealed body-frame angular distributions that suggest classical two-slit interference effects may be present when one electron carries most of the available energy and the second electron is not observed. We report precise quantum mechanical calculations that reproduce the experimental findings. They reveal that the interpretation in terms of classical diffraction is only appropriate at substantially higher photon energies. At the energies considered in the experiment we offer an alternative explanation based on the mixing of two nondiffractive contributions by circularly polarized light.
C1 [Horner, D. A.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Miyabe, S.; McCurdy, C. W.] Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA.
[Miyabe, S.; McCurdy, C. W.] Univ Calif Davis, Dept Chem, Davis, CA 95616 USA.
[Rescigno, T. N.; McCurdy, C. W.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Morales, F.; Martin, F.] Univ Autonoma Madrid, Dept Quim C9, E-28049 Madrid, Spain.
RP Horner, DA (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RI Martin, Fernando/C-3972-2014
OI Martin, Fernando/0000-0002-7529-925X
FU Los Alamos National Laboratory; Los Alamos National Laboratory
[DE-AC52-06NA25396]; Lawrence Berkeley National Laboratory
[DE-AC02-05CH11231]; Spanish Ministerio de Ciencia e Innovacion
[FIS2007-60064]; European Science Foundation [CM0702]; U. S. DOE Office
of Basic Energy Sciences, Division of Chemical Sciences.; National
Science Foundation [PHY-0604628]
FX We acknowledge many stimulating discussions with Professor Reinhard
Dorner that helped to inspire this work. Work performed under the
auspices of the U. S. DOE by Los Alamos National Laboratory (Contract
No. DE-AC52-06NA25396) and Lawrence Berkeley National Laboratory
(Contract No. DE-AC02-05CH11231), the Spanish Ministerio de Ciencia e
Innovacion (Contract No. FIS2007-60064), the European Science Foundation
(COST action CM0702), and supported by the U. S. DOE Office of Basic
Energy Sciences, Division of Chemical Sciences.C. W. M. and S. M.
acknowledge support from the National Science Foundation (Grant No.
PHY-0604628). Computer resources from Institutional Computing resources
(Los Alamos), NERSC (Berkeley), and Barcelona Supercomputer Center Mare
Nostrum (Spain) are also 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 OCT 31
PY 2008
VL 101
IS 18
AR 183002
DI 10.1103/PhysRevLett.101.183002
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 367TD
UT WOS:000260574600030
PM 18999826
ER
PT J
AU Moore, JE
Ran, Y
Wen, XG
AF Moore, Joel E.
Ran, Ying
Wen, Xiao-Gang
TI Topological Surface States in Three-Dimensional Magnetic Insulators
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID HOMOTOPY; PHASE; SPIN
AB An electron moving in a magnetically ordered background feels an effective magnetic field that can be both stronger and more rapidly varying than typical externally applied fields. One consequence is that insulating magnetic materials in three dimensions can have topologically nontrivial properties of the effective band structure. For the simplest case of two bands, these "Hopf insulators" are characterized by a topological invariant as in quantum Hall states and Z(2) topological insulators, but instead of a Chern number or parity, the underlying invariant is the Hopf invariant that classifies maps from the three-sphere to the two-sphere. This Letter gives an efficient algorithm to compute whether a given magnetic band structure has nontrivial Hopf invariant, a double-exchange-like tight-binding model that realizes the nontrivial case, and a numerical study of the surface states of this model.
C1 [Moore, Joel E.; Ran, Ying; Wen, Xiao-Gang] 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.
RP Moore, JE (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RI Moore, Joel/O-4959-2016
OI Moore, Joel/0000-0002-4294-5761
FU NSF [DMR-0238760, DMR-0804413, DMR-0706078]
FX The authors thank A. Abanov, F. Guinea, D.-H. Lee, and A. Vishwanath for
helpful conversations, and NSF DMR-0238760 and DMR-0804413 (J.E.M.),
ARO/DARPA (Y.R.) and NSF DMR-0706078 (X.G.W.) for financial support.
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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 OCT 31
PY 2008
VL 101
IS 18
AR 186805
DI 10.1103/PhysRevLett.101.186805
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 367TD
UT WOS:000260574600054
PM 18999850
ER
PT J
AU Nazikian, R
Fu, GY
Austin, ME
Berk, HL
Budny, RV
Gorelenkov, NN
Heidbrink, WW
Holcomb, CT
Kramer, GJ
Mckee, GR
Makowski, MA
Solomon, WM
Shafer, M
Strait, EJ
Van Zeeland, MA
AF Nazikian, R.
Fu, G. Y.
Austin, M. E.
Berk, H. L.
Budny, R. V.
Gorelenkov, N. N.
Heidbrink, W. W.
Holcomb, C. T.
Kramer, G. J.
McKee, G. R.
Makowski, M. A.
Solomon, W. M.
Shafer, M.
Strait, E. J.
Van Zeeland, M. A.
TI Intense Geodesic Acousticlike Modes Driven by Suprathermal Ions in a
Tokamak Plasma
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DIII-D TOKAMAK; CLUMP PAIR CREATION; N=0 CHIRPING MODE; ALFVEN
EIGENMODES; EXPLANATION; WAVES
AB Intense axisymmetric oscillations driven by suprathermal ions injected in the direction counter to the toroidal plasma current are observed in the DIII-D tokamak. The modes appear at nearly half the ideal geodesic acoustic mode frequency, in plasmas with comparable electron and ion temperatures and elevated magnetic safety factor (q(min)>= 2). Strong bursting and frequency chirping are observed, concomitant with large (10%-15%) drops in the neutron emission. Large electron density fluctuations (n(e)/n(e)similar or equal to 1.5%) are observed with no detectable electron temperature fluctuations, confirming a dominant compressional contribution to the pressure perturbation as predicted by kinetic theory. The observed mode frequency is consistent with a recent theoretical prediction for the energetic-particle-driven geodesic acoustic mode.
C1 [Nazikian, R.; Fu, G. Y.; Budny, R. V.; Gorelenkov, N. N.; Kramer, G. J.; Solomon, W. M.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Austin, M. E.; Berk, H. L.] Univ Texas Austin, Austin, TX 78712 USA.
[Heidbrink, W. W.] Univ Calif Irvine, Irvine, CA 92697 USA.
[Holcomb, C. T.; Makowski, M. A.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[McKee, G. R.; Shafer, M.] Univ Wisconsin, Madison, WI 53706 USA.
[Strait, E. J.; Van Zeeland, M. A.] Gen Atom Co, San Diego, CA 92186 USA.
RP Nazikian, R (reprint author), Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
OI Solomon, Wayne/0000-0002-0902-9876; Shafer, Morgan/0000-0001-9808-6305
FU U. S. Department of Energy [DE-AC02-76CH03073, DE-FG0397ER54415,
DE-FC02-04ER54698, DE-FG0301ER5461, DE-FG03-96ER54373, W-7405-ENG-48,
DE-AC05-76OR00033]
FX This work is supported by the U. S. Department of Energy under
DE-AC02-76CH03073, DE-FG0397ER54415, DE-FC02-04ER54698, DE-FG0301ER5461,
DE-FG03-96ER54373, W-7405-ENG-48, and DE-AC05-76OR00033.
NR 27
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U2 9
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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 OCT 31
PY 2008
VL 101
IS 18
AR 185001
DI 10.1103/PhysRevLett.101.185001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 367TD
UT WOS:000260574600039
PM 18999835
ER
PT J
AU Solvignon, P
Liyanage, N
Chen, JP
Choi, S
Aniol, K
Averett, T
Boeglin, W
Camsonne, A
Cates, GD
Chang, CC
Chudakov, E
Craver, B
Cusanno, F
Deur, A
Dutta, D
Ent, R
Feuerbach, R
Frullani, S
Gao, H
Garibaldi, F
Gilman, R
Glashausser, C
Gorbenko, V
Hansen, O
Higinbotham, DW
Ibrahim, H
Jiang, X
Jones, M
Kelleher, A
Kelly, J
Keppel, C
Kim, W
Korsch, W
Kramer, K
Kumbartzki, G
LeRose, JJ
Lindgren, R
Ma, B
Margaziotis, DJ
Markowitz, P
McCormick, K
Meziani, ZE
Michaels, R
Moffit, B
Monaghan, P
Camacho, C
Paschke, K
Reitz, B
Saha, A
Sheyor, R
Singh, J
Slifer, K
Sulkosky, V
Tobias, A
Urciuoli, GM
Wang, K
Wijesooriya, K
Wojtsekhowski, B
Woo, S
Yang, JC
Zheng, X
Zhu, L
AF Solvignon, P.
Liyanage, N.
Chen, J. -P.
Choi, Seonho
Aniol, K.
Averett, T.
Boeglin, W.
Camsonne, A.
Cates, G. D.
Chang, C. C.
Chudakov, E.
Craver, B.
Cusanno, F.
Deur, A.
Dutta, D.
Ent, R.
Feuerbach, R.
Frullani, S.
Gao, H.
Garibaldi, F.
Gilman, R.
Glashausser, C.
Gorbenko, V.
Hansen, O.
Higinbotham, D. W.
Ibrahim, H.
Jiang, X.
Jones, M.
Kelleher, A.
Kelly, J.
Keppel, C.
Kim, W.
Korsch, W.
Kramer, K.
Kumbartzki, G.
LeRose, J. J.
Lindgren, R.
Ma, B.
Margaziotis, D. J.
Markowitz, P.
McCormick, K.
Meziani, Z. -E.
Michaels, R.
Moffit, B.
Monaghan, P.
Munoz Camacho, C.
Paschke, K.
Reitz, B.
Saha, A.
Sheyor, R.
Singh, J.
Slifer, K.
Sulkosky, V.
Tobias, A.
Urciuoli, G. M.
Wang, K.
Wijesooriya, K.
Wojtsekhowski, B.
Woo, S.
Yang, J. -C.
Zheng, X.
Zhu, L.
CA Jefferson Lab E01-012 Collaboratio
TI Quark-Hadron Duality in Neutron (He-3) Spin Structure
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DEEP-INELASTIC SCATTERING; POLARIZED QUARK; DISTRIBUTIONS; NUCLEON;
REGION
AB We present experimental results of the first high-precision test of quark-hadron duality in the spin-structure function g(1) of the neutron and He-3 using a polarized He-3 target in the four-momentum-transfer-squared range from 0.7 to 4.0 (GeV/c)(2). Global duality is observed for the spin-structure function g(1) down to at least Q(2)=1.8 (GeV/c)(2) in both targets. We have also formed the photon-nucleon asymmetry A(1) in the resonance region for He-3 and found no strong Q(2) dependence above 2.2 (GeV/c)(2).
C1 [Solvignon, P.; Choi, Seonho; Slifer, K.] Temple Univ, Philadelphia, PA 19122 USA.
[Solvignon, P.; Zheng, X.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Camsonne, A.] Univ Clermont Ferrand, F-63177 Aubiere, France.
[Camsonne, A.] CNRS IN2P3 LPC, F-63177 Aubiere, France.
[Aniol, K.; Margaziotis, D. J.] Calif State Univ Los Angeles, Los Angeles, CA 90032 USA.
[Dutta, D.; Gao, H.; Wijesooriya, K.] Duke Univ, Durham, NC 27708 USA.
[Munoz Camacho, C.] CEA Saclay, DAPNIA SPhN, F-91191 Gif Sur Yvette, France.
[Yang, J. -C.] Chungnam Natl Univ, Taejon 305764, South Korea.
[Boeglin, W.; Markowitz, P.] Florida Int Univ, Miami, FL 33199 USA.
[Keppel, C.] Hampton Univ, Hampton, VA 23187 USA.
[Cusanno, F.; Frullani, S.; Garibaldi, F.] Ist Nazl Fis Nucl, Grp Coll Sanita, Sez Roma, I-00161 Rome, Italy.
[Urciuoli, G. M.] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy.
[Gorbenko, V.] Kharkov Phys & Technol Inst, UA-61108 Kharkov, Ukraine.
[Chen, J. -P.; Chudakov, E.; Ent, R.; Feuerbach, R.; Gilman, R.; Hansen, O.; Higinbotham, D. W.; Jones, M.; Keppel, C.; LeRose, J. J.; Michaels, R.; Reitz, B.; Saha, A.; Wojtsekhowski, B.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
[Korsch, W.] Univ Kentucky, Lexington, KY 40506 USA.
[Kim, W.; Woo, S.] Kyungpook Natl Univ, Taegu 702701, South Korea.
[Chang, C. C.; Kelly, J.] Univ Maryland, College Pk, MD 20742 USA.
[Paschke, K.] Univ Massachusetts, Amherst, MA 01003 USA.
[Ma, B.; Monaghan, P.; Zhu, L.] MIT, Cambridge, MA 02139 USA.
[Ibrahim, H.; Kumbartzki, G.; McCormick, K.] Old Dominion Univ, Norfolk, VA 23529 USA.
[Gilman, R.; Glashausser, C.; Jiang, X.] Rutgers State Univ, Piscataway, NJ 08855 USA.
[Meziani, Z. -E.; Sheyor, R.] Tel Aviv Univ, IL-69978 Tel Aviv, Israel.
[Liyanage, N.; Cates, G. D.; Craver, B.; Deur, A.; Lindgren, R.; Tobias, A.; Wang, K.] Univ Virginia, Charlottesville, VA 22904 USA.
[Averett, T.; Kelleher, A.; Kramer, K.; Moffit, B.; Sulkosky, V.] Coll William & Mary, Williamsburg, VA 23187 USA.
RP Solvignon, P (reprint author), Temple Univ, Philadelphia, PA 19122 USA.
RI Averett, Todd/A-2969-2011; Gao, Haiyan/G-2589-2011; Singh,
Jaideep/H-2346-2013; Higinbotham, Douglas/J-9394-2014
OI Singh, Jaideep/0000-0002-4810-4824; Higinbotham,
Douglas/0000-0003-2758-6526
FU National Science Foundation; US Department of Energy (DOE)
[DE-AC05-84ER40150]
FX We would like to acknowledge the outstanding support from the Jefferson
Lab Hall A technical staff. This work was supported in part by the
National Science Foundation and the US Department of Energy (DOE)
Contract No. DE-AC05-84ER40150 Modification No. M175, under which the
Southeastern Universities Research Association (SURA) operates the
Thomas Jefferson National Accelerator Facility.
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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 OCT 31
PY 2008
VL 101
IS 18
AR 182502
DI 10.1103/PhysRevLett.101.182502
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 367TD
UT WOS:000260574600027
PM 18999823
ER
PT J
AU Tandel, US
Tandel, SK
Chowdhury, P
Cline, D
Wu, CY
Carpenter, MP
Janssens, RVF
Khoo, TL
Lauritsen, T
Lister, CJ
Seweryniak, D
Zhu, S
AF Tandel, U. S.
Tandel, S. K.
Chowdhury, P.
Cline, D.
Wu, C. Y.
Carpenter, M. P.
Janssens, R. V. F.
Khoo, T. L.
Lauritsen, T.
Lister, C. J.
Seweryniak, D.
Zhu, S.
TI Collective Oblate Rotation at High Spins in Neutron-Rich Hf-180
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID HIGH-K ISOMERS; NUCLEI; BAND; GAMMASPHERE; ALIGNMENT
AB We report on experimental evidence for collective oblate rotation becoming favored at high spins in a rigid, well-deformed, axially symmetric nucleus. Excited states established up to spin 20h in Hf-180 are consistent with predictions that nucleon alignments would favor oblate over prolate shapes at high spins in neutron-rich Hf isotopes. The results highlight the influence of valence orbitals on the interplay between nucleon alignments and nuclear shapes and provide a rare example of independent particle dynamics in competing potential wells.
C1 [Tandel, U. S.; Tandel, S. K.; Chowdhury, P.] Univ Massachusetts, Dept Phys, Lowell, MA 01854 USA.
[Cline, D.; Wu, C. Y.] Univ Rochester, Nucl Struct Res Lab, Rochester, NY 14627 USA.
[Carpenter, M. P.; Janssens, R. V. F.; Khoo, T. L.; Lauritsen, T.; Lister, C. J.; Seweryniak, D.; Zhu, S.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RP Tandel, US (reprint author), Univ Massachusetts, Dept Phys, Lowell, MA 01854 USA.
RI Carpenter, Michael/E-4287-2015
OI Carpenter, Michael/0000-0002-3237-5734
FU U. S. Department of Energy; Office of Nuclear Physics
[DE-FG02-94ER40848, DE-AC0206CH11357]; National Science Foundation
FX We would like to acknowledge useful discussions with P. M. Walker, and
the ATLAS accelerator staff for developing the 180Hf beam.
This research is supported by the U. S. Department of Energy, Office of
Nuclear Physics, under grants DE-FG02-94ER40848 and DE-AC0206CH11357,
and the National Science Foundation.
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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 OCT 31
PY 2008
VL 101
IS 18
AR 182503
DI 10.1103/PhysRevLett.101.182503
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 367TD
UT WOS:000260574600028
PM 18999824
ER
PT J
AU Yang, L
Cohen, ML
Louie, SG
AF Yang, Li
Cohen, Marvin L.
Louie, Steven G.
TI Magnetic Edge-State Excitons in Zigzag Graphene Nanoribbons
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID QUASI-PARTICLE ENERGIES; WALLED CARBON NANOTUBES; OPTICAL-SPECTRA;
SEMICONDUCTORS; GRAPHITE; RIBBONS; GAS
AB We present first-principles calculations of the optical properties of zigzag-edged graphene nanoribbons (ZGNRs) employing the GW-Bethe-Salpeter equation approach with the spin interaction included. Optical response of the ZGNRs is found to be dominated by magnetic edge-state-derived excitons with large binding energy. The absorption spectrum is composed of a characteristic series of exciton states, providing a possible signature for identifying the ZGNRs. The edge-state excitons are charge-transfer excitations with the excited electron and hole located on opposite edges; they moreover induce a spin transfer across the ribbon, resulting in a photoreduction of the magnetic ordering. These novel characteristics are potentially useful in the applications.
C1 [Yang, Li] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Yang, L (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
FU National Science Foundation [DMR07-05941]; Director, Office of Science,
Office of Basic Energy Sciences, Division of Materials Sciences and
Engineering Division, U. S. Department of Energy [DE-AC02-05CH11231.]
FX We thank C.- H. Park, D. Prendergast, and J. Deslippe for 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 NERSC
and NPACI.
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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 OCT 31
PY 2008
VL 101
IS 18
AR 186401
DI 10.1103/PhysRevLett.101.186401
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 367TD
UT WOS:000260574600047
PM 18999843
ER
PT J
AU Yin, L
Xia, JS
Zapf, VS
Sullivan, NS
Paduan, A
AF Yin, L.
Xia, J. S.
Zapf, V. S.
Sullivan, N. S.
Paduan-Filho, A.
TI Direct Measurement of the Bose-Einstein Condensation Universality Class
in NiCl(2)-4SC(NH(2))(2) at Ultralow Temperatures
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID TLCUCL3
AB In this work, we demonstrate field-induced Bose-Einstein condensation (BEC) in the organic compound NiCl(2)-4SC(NH(2))(2) using ac susceptibility measurements down to 1 mK. The Ni S=1 spins exhibit 3D XY antiferromagnetism between a lower critical field H(c1)similar to 2 T and a upper critical field H(c2)similar to 12 T. The results show a power-law temperature dependence of the phase transition line H(c1)(T)-H(c1)(0)=aT(alpha) with alpha=1.47 +/- 0.10 and H(c1)(0)=2.053 T, consistent with the 3D BEC universality class. Near H(c2), a kink was found in the phase boundary at approximately 150 mK.
C1 [Yin, L.; Xia, J. S.; Sullivan, N. S.] Univ Florida, Dept Phys, Gainesville, FL 32611 USA.
[Yin, L.; Xia, J. S.; Sullivan, N. S.] Natl High Magnet Field Lab, Gainesville, FL 32611 USA.
[Zapf, V. S.] Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA.
[Paduan-Filho, A.] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil.
RP Yin, L (reprint author), Univ Florida, Dept Phys, Gainesville, FL 32611 USA.
RI YIN, LIANG/G-7585-2011; PaduanFilho, Armando/H-2443-2011; Zapf,
Vivien/K-5645-2013
OI Zapf, Vivien/0000-0002-8375-4515
FU National Science Foundation Cooperative Agreement [DMR 0654118];
Department of Energy and the State of Florida.
FX These measurements were carried out at the High B/T facility of the
National High Magnetic Field Laboratory and were supported by the
National Science Foundation Cooperative Agreement No. DMR 0654118, the
Department of Energy and the State of Florida. A. P. F. acknowledges
support from the Brazilian Agencies CNPq and FAPESP.
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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 OCT 31
PY 2008
VL 101
IS 18
AR 187205
DI 10.1103/PhysRevLett.101.187205
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 367TD
UT WOS:000260574600065
PM 18999861
ER
PT J
AU Kwak, J
Willse, A
Matsumura, K
Opiekun, MC
Yi, WG
Preti, G
Yamazaki, K
Beauchamp, GK
AF Kwak, Jae
Willse, Alan
Matsumura, Koichi
Opiekun, Maryanne Curran
Yi, Weiguang
Preti, George
Yamazaki, Kunio
Beauchamp, Gary K.
TI Genetically-Based Olfactory Signatures Persist Despite Dietary Variation
SO PLOS ONE
LA English
DT Article
AB Individual mice have a unique odor, or odortype, that facilitates individual recognition. Odortypes, like other phenotypes, can be influenced by genetic and environmental variation. The genetic influence derives in part from genes of the major histocompatibility complex (MHC). A major environmental influence is diet, which could obscure the genetic contribution to odortype. Because odortype stability is a prerequisite for individual recognition under normal behavioral conditions, we investigated whether MHC-determined urinary odortypes of inbred mice can be identified in the face of large diet-induced variation. Mice trained to discriminate urines from panels of mice that differed both in diet and MHC type found the diet odor more salient in generalization trials. Nevertheless, when mice were trained to discriminate mice with only MHC differences (but on the same diet), they recognized the MHC difference when tested with urines from mice on a different diet. This indicates that MHC odor profiles remain despite large dietary variation. Chemical analyses of urinary volatile organic compounds (VOCs) extracted by solid phase microextraction (SPME) and analyzed by gas chromatography/mass spectrometry (GC/MS) are consistent with this inference. Although diet influenced VOC variation more than MHC, with algorithmic training (supervised classification) MHC types could be accurately discriminated across different diets. Thus, although there are clear diet effects on urinary volatile profiles, they do not obscure MHC effects.
C1 [Kwak, Jae; Matsumura, Koichi; Opiekun, Maryanne Curran; Yi, Weiguang; Preti, George; Yamazaki, Kunio; Beauchamp, Gary K.] Monell Chem Senses Ctr, Philadelphia, PA 19104 USA.
[Willse, Alan] Battelle Mem Inst, Pacific NW Div, Richland, WA USA.
[Preti, George] Univ Penn, Sch Med, Dept Dermatol, Philadelphia, PA 19104 USA.
RP Kwak, J (reprint author), Monell Chem Senses Ctr, 3500 Market St, Philadelphia, PA 19104 USA.
EM beauchamp@monell.org
RI Kwak, Jae/E-5781-2011
OI Kwak, Jae/0000-0003-4216-2019
FU ARO [DAAD19-03-1-0109]
FX This work is supported by ARO contract DAAD19-03-1-0109. Opinions,
interpretations, conclusions, and recommendations are those of the
authors and are not necessarily endorsed by the United States
Government.
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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 OCT 31
PY 2008
VL 3
IS 10
AR e3591
DI 10.1371/journal.pone.0003591
PG 9
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 432KK
UT WOS:000265131700012
PM 18974891
ER
PT J
AU Price, MN
Dehal, PS
Arkin, AP
AF Price, Morgan N.
Dehal, Paramvir S.
Arkin, Adam P.
TI FastBLAST: Homology Relationships for Millions of Proteins
SO PLOS ONE
LA English
DT Article
AB Background: All-versus-all BLAST, which searches for homologous pairs of sequences in a database of proteins, is used to identify potential orthologs, to find new protein families, and to provide rapid access to these homology relationships. As DNA sequencing accelerates and data sets grow, all-versus-all BLAST has become computationally demanding.
Methodology/Principal Findings: We present FastBLAST, a heuristic replacement for all-versus-all BLAST that relies on alignments of proteins to known families, obtained from tools such as PSI-BLAST and HMMer. FastBLAST avoids most of the work of all-versus-all BLAST by taking advantage of these alignments and by clustering similar sequences. FastBLAST runs in two stages: the first stage identifies additional families and aligns them, and the second stage quickly identifies the homologs of a query sequence, based on the alignments of the families, before generating pairwise alignments. On 6.53 million proteins from the non-redundant Genbank database ("NR''), FastBLAST identifies new families 25 times faster than all-versus-all BLAST. Once the first stage is completed, FastBLAST identifies homologs for the average query in less than 5 seconds (8.6 times faster than BLAST) and gives nearly identical results. For hits above 70 bits, FastBLAST identifies 98% of the top 3,250 hits per query.
Conclusions/Significance: FastBLAST enables research groups that do not have supercomputers to analyze large protein sequence data sets. FastBLAST is open source software and is available at http://microbesonline.org/fastblast.
C1 [Price, Morgan N.; Dehal, Paramvir S.; Arkin, Adam P.] Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
[Price, Morgan N.; Dehal, Paramvir S.; Arkin, Adam P.] Virtual Inst Microb Stress & Survival, Berkeley, CA USA.
[Arkin, Adam P.] Univ Calif Berkeley, Dept Bioengn, Berkeley, CA 94720 USA.
RP Price, MN (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
EM morgannprice@yahoo.com
RI Arkin, Adam/A-6751-2008
OI Arkin, Adam/0000-0002-4999-2931
FU US Department of Energy Genomics: GTL program [DE-AC02-05CH11231]
FX This work was supported by a grant to A.P.A. from the US Department of
Energy Genomics: GTL program (DE-AC02-05CH11231). The funder had no role
in study design, data collection and analysis, decision to publish, or
preparation of the manuscript.
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PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD OCT 31
PY 2008
VL 3
IS 10
AR e3589
DI 10.1371/journal.pone.0003589
PG 8
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 432KK
UT WOS:000265131700011
PM 18974889
ER
PT J
AU Stephenson, AE
DeYoreo, JJ
Wu, L
Wu, KJ
Hoyer, J
Dove, PM
AF Stephenson, A. E.
DeYoreo, J. J.
Wu, L.
Wu, K. J.
Hoyer, J.
Dove, P. M.
TI Peptides Enhance Magnesium Signature in Calcite: Insights into Origins
of Vital Effects
SO SCIENCE
LA English
DT Article
ID AQUEOUS SOLUTION SYSTEMS; CRYSTAL-GROWTH; KINETICS; SURFACE;
BIOMINERALIZATION; SUPERSATURATION; TEMPERATURE; PROTEINS;
PRECIPITATION; DESOLVATION
AB Studies relating the magnesium (Mg) content of calcified skeletons to temperature often report unexplained deviations from the signature expected for inorganically grown calcite. These "vital effects" are believed to have biological origins, but mechanistic bases for measured offsets remain unclear. We show that a simple hydrophilic peptide, with the same carboxyl- rich character as that of macromolecules isolated from sites of calcification, increases calcite Mg content by up to 3 mole percent. Comparisons to previous studies correlating Mg content of carbonate minerals with temperature show that the Mg enhancement due to peptides results in offsets equivalent to 7 degrees to 14 degrees C. The insights also provide a physical basis for anecdotal evidence that organic chemistry modulates the mineralization of inorganic carbonates and suggest an approach to tuning impurity levels in controlled materials synthesis.
C1 [Stephenson, A. E.; Dove, P. M.] Virginia Tech, Dept Geosci, Blacksburg, VA 24061 USA.
[DeYoreo, J. J.; Wu, L.; Wu, K. J.] Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94551 USA.
[Wu, L.] Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA.
[Hoyer, J.] Univ Delaware, Dept Biol Sci, Newark, DE 19716 USA.
RP Stephenson, AE (reprint author), Virginia Tech, Dept Geosci, Blacksburg, VA 24061 USA.
EM aestephe@vt.edu; dove@vt.edu
RI yu, yu/C-7781-2009; Wu, Ligang/C-7770-2009; Dove, Patricia/A-7911-2010
FU NSF [OCE-052667]; U.S. Department of Energy [FG02-00ER15112]
FX We thank J.F. Read and D. Rimstidt for thoughtful discussions. This
research was supported by awards to P.M.D. from the NSF (grant
OCE-052667) and U. S. Department of Energy (grant FG02-00ER15112). This
work was also performed under the auspices of the U.S. DOE by an award
to J.D.Y. at the University of California, Lawrence Livermore National
Laboratory, under Contract No. W-7405-Eng-48. Opinions, findings, and
conclusions or recommendations expressed in this material are those of
the authors and do not necessarily reflect the views of the NSF or DOE.
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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 OCT 31
PY 2008
VL 322
IS 5902
BP 724
EP 727
DI 10.1126/science.1159417
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 368EW
UT WOS:000260605200043
PM 18974348
ER
PT J
AU Hou, C
Zuo, WY
Moses, ME
Woodruff, WH
Brown, JH
West, GB
AF Hou, Chen
Zuo, Wenyun
Moses, Melanie E.
Woodruff, William H.
Brown, James H.
West, Geoffrey B.
TI Energy Uptake and Allocation During Ontogeny
SO SCIENCE
LA English
DT Article
ID DYNAMIC ACTION; GROWTH; MODEL; SDA
AB All organisms face the problem of how to fuel ontogenetic growth. We present a model, empirically grounded in data from birds and mammals, that correctly predicts how growing animals allocate food energy between synthesis of new biomass and maintenance of existing biomass. Previous energy budget models have typically had their bases in rates of either food consumption or metabolic energy expenditure. Our model provides a framework that reconciles these two approaches and highlights the fundamental principles that determine rates of food assimilation and rates of energy allocation to maintenance, biosynthesis, activity, and storage. The model predicts that growth and assimilation rates for all animals should cluster closely around two universal curves. Data for mammals and birds of diverse body sizes and taxa support these predictions.
C1 [Hou, Chen; Woodruff, William H.; Brown, James H.; West, Geoffrey B.] Santa Fe Inst, Santa Fe, NM 87501 USA.
[Zuo, Wenyun; Brown, James H.] Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA.
[Moses, Melanie E.] Univ New Mexico, Dept Comp Sci, Albuquerque, NM 87131 USA.
[Woodruff, William H.; West, Geoffrey B.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Hou, C (reprint author), Santa Fe Inst, 1399 Hyde Pk Rd, Santa Fe, NM 87501 USA.
EM houc@santafe.edu
OI Hou, Chen/0000-0002-3665-225X
FU NIH [P20 RR-018754, DK36263]; NSF [DEB-0083422, CCF0621900, PHY 0706174,
PHY 0202180]; Thaw Charitable Trust
FX Supported by NIH grants P20 RR-018754 (for M.E.M.) and DK36263 (for
W.H.W.) and by NSF grants DEB-0083422 and CCF0621900 (for J.H.B.) and
PHY 0706174 and PHY 0202180 (for G.B.W.) G.B.W. also acknowledges the
Thaw Charitable Trust for its support.
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PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
J9 SCIENCE
JI Science
PD OCT 31
PY 2008
VL 322
IS 5902
BP 736
EP 739
DI 10.1126/science.1162302
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 368EW
UT WOS:000260605200047
PM 18974352
ER
PT J
AU Li, JY
Yao, WL
Martin, S
Vaknin, D
AF Li, Jiying
Yao, Wenlong
Martin, Steve
Vaknin, David
TI Lithium ion conductivity in single crystal LiFePO4
SO SOLID STATE IONICS
LA English
DT Article
DE Lithium rechargeable battery; Cathode material; LiFePO4; Ionic
conductivity
ID ELECTRODE MATERIALS; UNDOPED LIFEPO4; SOLID-SOLUTION; BATTERIES;
TEMPERATURE; CATHODES; BEHAVIOR; MN; FE
AB Although extensively studied as a potential Li rechargeable battery cathode in its powder form, very little is known about the anisotropy of the ionic and electronic transport properties in LiFePO4 as it may be manifested in single crystal studies. Here. we report on the conductivity of lithium ions along three principal axis directions in single crystal LiFePO4 as a function of temperature by AC impedance spectroscopy. Despite the apparent quasi-two dimensional nature of the crystal structure, suggestive of facilitated inplane diffusion, we show that Li diffusion in LiFePO4 is, to a large extent. confined to one dimension through tunnels along b-axis (using the Pnma symmetry group notation), implying oriented powders in batteries may improve the performance of this material as a cathode in rechargeable batteries. Our results may also explain the numerous failed attempts to enhance the ionic conductivity by introducing divalent and trivalent substitutions to Li+ that, although produce vacancies in the Li sheets, may concurrently impede the diffusion in the tunnels. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Li, Jiying; Vaknin, David] Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA.
[Vaknin, David] Iowa State Univ Sci & Technol, Dept Phys, Ames, IA 50011 USA.
[Li, Jiying] Iowa State Univ Sci & Technol, Dept Phys & Astron, Ames, IA 50011 USA.
[Yao, Wenlong; Martin, Steve] Iowa State Univ Sci & Technol, Dept Mat Sci & Engn, Ames, IA 50011 USA.
RP Vaknin, D (reprint author), Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA.
EM vaknin@ameslab.gov
RI Vaknin, David/B-3302-2009
OI Vaknin, David/0000-0002-0899-9248
FU Department of Energy, Office of Basic Energy Sciences
[DE-AC02-07CH11358]
FX The work was supported by the Department of Energy, Office of Basic
Energy Sciences under contract number DE-AC02-07CH11358.
NR 29
TC 84
Z9 86
U1 3
U2 84
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 OCT 31
PY 2008
VL 179
IS 35-36
BP 2016
EP 2019
DI 10.1016/j.ssi.2008.06.028
PG 4
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 386TF
UT WOS:000261904800011
ER
PT J
AU Sherwood, OA
Edinger, EN
Guilderson, TP
Ghaleb, B
Risk, MJ
Scott, DB
AF Sherwood, Owen A.
Edinger, Evan N.
Guilderson, Thomas P.
Ghaleb, Bassam
Risk, Michael J.
Scott, David B.
TI Late Holocene radiocarbon variability in Northwest Atlantic slope waters
SO EARTH AND PLANETARY SCIENCE LETTERS
LA English
DT Article
DE radiocarbon; bomb-C-14; vertical gradient; deep-sea corals; Northwest
Atlantic
ID DEEP-SEA CORALS; ANTARCTIC INTERMEDIATE WATER; CAL KYR BP; BOMB
RADIOCARBON; AGE CALIBRATION; RESERVOIR AGES; MARINE SAMPLES;
SURFACE-WATER; GEORGES BANK; C-14 DATA
AB Deep-sea gorgonian corals secrete a 2-part skeleton of calcite, derived from dissolved inorganic carbon at depth. and gorgonin, derived from recently fixed and exported particulate organic matter. Radiocarbon contents of the calcite and gorgonin provide direct measures of seawater radiocarbon at depth and in the overlying surface waters, respectively. Using specimens collected from Northwest Atlantic slope waters, we generated radiocarbon records for surface and upper intermediate water layers spanning the pre- and post-bomb- C-14 eras. In Labrador Slope Water (LSW), convective mixing homogenizes the pre-bomb Delta C-14 signature (-67 +/- 4 parts per thousand) to at least 1000 m depth. Surface water bomb-C-14 signals were lagged and damped (peaking at similar to+45 parts per thousand in theearly 1980s) relative to other regions of the Northwest Atlantic, and intermediate water signals were damped further. Off southwest Nova Scotia, the vertical gradient in Delta C-14 is much stronger. In surface water, pre-bomb A 14C averaged -75 +/- 5 parts per thousand. At 250-475 m depth, pre-bomb Delta C-14 oscillated quasi-decadally between -80 and -100 parts per thousand, likely reflecting interannual variability in the presence of Labrador Slope Water vs. Warm Slope Water (WSW). Finally, sublossil corals reveal no systematic changes in vertical Delta C-14 gradients over the last 1200 yr. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Sherwood, Owen A.; Edinger, Evan N.] Mem Univ Newfoundland, Dept Biol, St John, NF A1B 3X9, Canada.
[Edinger, Evan N.] Mem Univ Newfoundland, Dept Geog, St John, NF A1B 3X9, Canada.
[Guilderson, Thomas P.] Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94551 USA.
[Guilderson, Thomas P.] Univ Calif Santa Cruz, Dept Ocean Sci, Santa Cruz, CA 95064 USA.
[Guilderson, Thomas P.] Univ Calif Santa Cruz, Inst Marine Sci, Santa Cruz, CA 95064 USA.
[Ghaleb, Bassam] Ctr GEOTOP UQAM McCill, Montreal, PQ H3C 3P8, Canada.
[Risk, Michael J.] McMaster Univ, Sch Geog & Geol, Hamilton, ON L8S 4M1, Canada.
[Scott, David B.] Dalhousie Univ, Ctr Environm & Marine Geol, Halifax, NS B3H 4J1, Canada.
RP Sherwood, OA (reprint author), Mem Univ Newfoundland, Dept Biol, St John, NF A1B 3X9, Canada.
EM osherwood@gmail.com
FU Canadian Department of Fisheries and Oceans IGP funds; NSERC
post-doctoral fellowship; U.S. Department of Energy by the University of
California; Lawrence Livermore National Laboratory [W-7405-Eng-48]
FX We gratefully acknowledge Derek Jones, Pal Mortensen, the fisheries
observers and officers and crew of the CCGS Hudson, and ROPOS
technicians for their assistance in acquiring samples. We also thank
Kent Gilkinson and Vonda Wareham for logistical support, Steve Campana
for use of the micromill, and Theo Pitsiavas, Jessie Tesolin and
Christine Ward-Paige for counting growth rings. Finally, we thank Kumiko
Azetsu-Scott, Richard Fairbanks and 2 anonymous reviewers for comments
on earlier versions of this manuscript. This work was supported by the
Canadian Department of Fisheries and Oceans IGP funds, and an NSERC
post-doctoral fellowship to OAS. Radiocarbon analyses were performed
under the auspices of the U.S. Department of Energy by the University of
California, Lawrence Livermore National Laboratory under Contract No.
W-7405-Eng-48.
NR 57
TC 21
Z9 22
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 OCT 30
PY 2008
VL 275
IS 1-2
BP 146
EP 153
DI 10.1016/j.epsl.2008.08.019
PG 8
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 373SN
UT WOS:000260993000016
ER
PT J
AU Culcer, D
AF Culcer, Dimitrie
TI STEADY-STATE SPIN DENSITIES AND CURRENTS
SO INTERNATIONAL JOURNAL OF MODERN PHYSICS B
LA English
DT Review
DE Spin; spin current; spin-orbit
ID ELECTRIC-CURRENT; QUANTUM-THEORY; HALL; SEMICONDUCTORS; POLARIZATION;
CRYSTALS; METAL
AB This article reviews steady-state spin densities and spin currents in materials with strong spin-orbit interactions. These phenomena are intimately related to spin precession due to spin-orbit coupling, which has no equivalent in the steady state of charge distributions. The focus will initially be on effects originating from the band structure. In this case, spin densities arise in an electric field because a component of each spin is conserved during precession. Spin currents arise because a component of each spin is continually precessing. These two phenomena are due to independent contributions to the steady-state density matrix, and scattering between the conserved and precessing spin distributions has important consequences for spin dynamics and spin-related effects in general. In the latter part of the article, extrinsic effects such as skew scattering and side jump will be discussed, and it will be shown that these effects are also modified considerably by spin precession. Theoretical and experimental progress in all areas will be reviewed.
C1 [Culcer, Dimitrie] Univ Maryland, Dept Phys, Condensed Matter Theory Ctr, College Pk, MD 20742 USA.
[Culcer, Dimitrie] No Illinois Univ, De Kalb, IL 60115 USA.
[Culcer, Dimitrie] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Culcer, D (reprint author), Univ Maryland, Dept Phys, Condensed Matter Theory Ctr, College Pk, MD 20742 USA.
EM dimi@physics.utexas.edu
NR 102
TC 2
Z9 2
U1 2
U2 11
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0217-9792
J9 INT J MOD PHYS B
JI Int. J. Mod. Phys. B
PD OCT 30
PY 2008
VL 22
IS 27
BP 4765
EP 4791
DI 10.1142/S021797920804911X
PG 27
WC Physics, Applied; Physics, Condensed Matter; Physics, Mathematical
SC Physics
GA 371AU
UT WOS:000260805000001
ER
PT J
AU Clilverd, MA
Rodger, CJ
Brundell, J
Bahr, J
Cobbett, N
Moffat-Griffin, T
Kavanagh, AJ
Seppala, A
Thomson, NR
Friedel, RHW
Menk, FW
AF Clilverd, Mark A.
Rodger, Craig J.
Brundell, James
Bahr, John
Cobbett, Neil
Moffat-Griffin, Tracy
Kavanagh, Andrew J.
Seppala, Annika
Thomson, Neil R.
Friedel, Reiner H. W.
Menk, Frederick W.
TI Energetic electron precipitation during substorm injection events:
High-latitude fluxes and an unexpected midlatitude signature
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID IONIZATION; ATMOSPHERE; PROPAGATION; IONOSPHERE; DEPOSITION; DYNAMICS;
SPECTRA; CHORUS; WAVES; SIZE
AB Geosynchronous Los Alamos National Laboratory (LANL-97A) satellite particle data, riometer data, and radio wave data recorded at high geomagnetic latitudes in the region south of Australia and New Zealand are used to perform the first complete modeling study of the effect of substorm electron precipitation fluxes on low-frequency radio wave propagation conditions associated with dispersionless substorm injection events. We find that the precipitated electron energy spectrum is consistent with an e-folding energy of 50 keV for energies <400 keV but also contains higher fluxes of electrons from 400 to 2000 keV. To reproduce the peak subionospheric radio wave absorption signatures seen at Casey (Australian Antarctic Division), and the peak riometer absorption observed at Macquarie Island, requires the precipitation of 50-90% of the peak fluxes observed by LAM+NL-97A. Additionally, there is a concurrent and previously unreported substorm signature at L< 2.8, observed as a substorm-associated phase advance on radio waves propagation between Australia and New Zealand. Two mechanisms are discussed to explain the phase advances. We find that the most likely mechanism is the triggering of wave-induced electron precipitation caused by waves enhanced in the plasmasphere during the substorm and that either plasmaspheric hiss waves or electromagnetic ion cyclotron waves are a potential source capable of precipitationg the type of high-energy electron spectrum required. However, the presence of these waves at such low L shells has not been confirmed in this study.
C1 [Clilverd, Mark A.; Cobbett, Neil; Moffat-Griffin, Tracy] British Antarctic Survey, Natl Environm Res Council, Div Phys Sci, Cambridge CB3 0ET, England.
[Rodger, Craig J.; Bahr, John; Thomson, Neil R.] Univ Otago, Dept Phys, Dunedin 9054, New Zealand.
[Kavanagh, Andrew J.] Univ Lancaster, Dept Commun Syst, Space Plasma Environm & Radio Sci Grp, InfoLab 21, Lancaster LA1 4WA, England.
[Seppala, Annika] Finnish Meteorol Inst, FIN-00101 Helsinki, Finland.
[Friedel, Reiner H. W.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Menk, Frederick W.] Univ Newcastle, Sch Math & Phys Sci, Callaghan, NSW 2308, Australia.
[Menk, Frederick W.] Univ Newcastle, Cooperat Res Ctr Satellite Syst, Callaghan, NSW 2308, Australia.
RP Clilverd, MA (reprint author), British Antarctic Survey, Natl Environm Res Council, Div Phys Sci, Madingley Rd, Cambridge CB3 0ET, England.
EM macl@bas.ac.uk; crodger@physics.otago.ac.nz; james@brundell.co.nz;
bahr@physics.otago.ac.nz; nco@bas.ac.uk; tmof@bas.ac.uk;
a.j.kavanagh@lancaster.ac.uk; annika.seppala@fmi.fi;
n_thomson@physics.otago.ac.nz; friedel@lanl.gov;
fred.menk@newcastle.edu.au
RI Brundell, James/F-3196-2013; Seppala, Annika/C-8031-2014; Rodger,
Craig/A-1501-2011; Menk, Frederick/A-2640-2009; Friedel,
Reiner/D-1410-2012
OI Brundell, James/0000-0002-8753-4720; Seppala,
Annika/0000-0002-5028-8220; Rodger, Craig/0000-0002-6770-2707; Menk,
Frederick/0000-0002-1154-6223; Friedel, Reiner/0000-0002-5228-0281
FU Finnish Academy
FX The authors would like to thank Bill and Helen Dunford for their
generous support during this work. The Casey data are supported by AAD
project ASAC 1324. We would also like to acknowledge the use of the AAD
data system for the provision of the Macquarie Island Riometer data,
available at http://www.ips.gov.au/World_Data_Centre/1/8. We would like
to acknowledge Hiroshi Fukunishi of Tohoku University, Sendai, Japan,
for providing the summary AGO Pc 1-2 data. The LANL data were kindly
provided by the Los Alamos National Laboratory from
http://leadbelly.lan1.gov/lan1_ep_data. A. S. would like to acknowledge
funding support from the Finnish Academy.
NR 37
TC 17
Z9 18
U1 0
U2 1
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 OCT 30
PY 2008
VL 113
IS A10
AR A10311
DI 10.1029/2008JA013220
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 368EJ
UT WOS:000260603800003
ER
PT J
AU Lee, RW
Kulesz, JJ
AF Lee, Ronald W.
Kulesz, James J.
TI A risk-based sensor placement methodology
SO JOURNAL OF HAZARDOUS MATERIALS
LA English
DT Article
DE Sensor placement; Risk
AB A risk-based sensor placement methodology is proposed to solve the problem of optimal location of sensors to protect population against the exposure to, and effects of, known and/or postulated chemical, biological, and/or radiological threats. Risk is calculated its a quantitative Value representing population at risk from exposure at standard exposure levels.
Historical meteorological data are used to characterize weather conditions as the frequency of wind speed and direction pairs. The meteorological data drive atmospheric transport and dispersion modeling of the threats. the results of which are used to calculate risk values. Sensor locations are determined via an iterative dynamic programming algorithm whereby threats detected by sensors placed in prior iterations are removed from consideration in Subsequent iterations.
In addition to the risk-based placement algorithm, the proposed methodology provides a quantification of the marginal utility of each additional sensor. This is the fraction of the total risk accounted for by placement of the sensor. Thus, the criteria for halting the iterative process call be the number of sensors available. a threshold marginal utility value, and/or a minimum cumulative utility achieved with all sensors. (c) 2008 Elsevier B.V All rights reserved.
C1 [Lee, Ronald W.; Kulesz, James J.] Oak Ridge Natl Lab, Computat Sci & Engn Div, Oak Ridge, TN USA.
RP Lee, RW (reprint author), Oak Ridge Natl Lab, Computat Sci & Engn Div, Oak Ridge, TN USA.
EM leerw@ornl.gov
FU UT-Battelle, LLC [AC05-00OR22725]
FX This manuscript has been authored by UT-Battelle, LLC, under contract
DE-AC05-00OR22725 with the U.S. Department of Energy. The United States
Government retains and the publisher, by accepting the article for
publication, acknowledges that the United States Government retains a
non-exclusive, paid-up, irrevocable, world-wide license to publish or
reproduce the published form of this manuscript, or allow others to do
so, for United States Government Purpose.
NR 16
TC 8
Z9 9
U1 1
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3894
J9 J HAZARD MATER
JI J. Hazard. Mater.
PD OCT 30
PY 2008
VL 158
IS 2-3
BP 417
EP 429
DI 10.1016/j.jhazmat.2008.01.111
PG 13
WC Engineering, Environmental; Engineering, Civil; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA 358AB
UT WOS:000259887400022
PM 18343570
ER
PT J
AU Benson, MT
Moser, ML
Peterman, DR
Dinescu, A
AF Benson, Michael T.
Moser, Megan L.
Peterman, Dean R.
Dinescu, Adriana
TI Determination of pK(a) for dithiophosphinic acids using density
functional theory
SO JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM
LA English
DT Article
DE Dithiophosphinic acid; pK(a); Density functional theory; Cyanex-301
ID 1ST PRINCIPLES CALCULATIONS; GAS-PHASE; AB-INITIO; TRIVALENT ACTINIDES;
MOLECULAR-STRUCTURE; CRYSTAL-STRUCTURE; SOLVATION MODEL; FREE-ENERGY;
EXTRACTION; VALUES
AB Aromatic dithiophosphinic acids have shown remarkable abilities for separating minor actinides from accompanying lanthanide elements. In particular, the bis(o-trifluoromethylphenyl)dithiophosphinic acid has displayed excellent separation properties, and this molecule also has an unexpectedly high pK(a). To investigate the intrinsic chemistry responsible for the separation and acidity behavior, and envelope of dithiophosphinic acid derivatives were investigated using Density Functional Theory. Symmetric aromatic dithiophosphinic acids of the form (XC6H4)(2)P(=S)(SH), where X = H, o-CH3, p-CH3, p-Cl, p-F, o-CF3, m-CF3, and p-CF3, and asymmetric aromatic acids of the form (X'C6H4)(X"C6H4)P(=S)(SH), where X'=o-CF3, X"=m-CF3; X'=H, X"=o-CF3, have been investigated using B3LYP/6-311G(d,p) and 6311 ++G(d,p) (Gaussian03). Solvation was included in the calculations using the CPCM continuum solvation method. Using the thermochemical data from vibrational frequency calculations, the pK(a) was calculated for the acids, and compared to that of Cyanex-301. The unexpectedly high pK(a) for bis(o-trifluoromethylphenyl)dithiophosphinic acid, when compared to the ortho-meta, meta-meta, and para-para isomers, is rationalized by electron repulsion between nearby fluorines and the sulfurs in the anion. This repulsion destabilizes the anion to a greater extent than the other isomers, thus raising the pK(a) (c) 2008 Elsevier B.V. All rights reserved.
C1 [Benson, Michael T.; Moser, Megan L.; Peterman, Dean R.; Dinescu, Adriana] Idaho Natl Lab, Interfacial Chem Dept, Idaho Falls, ID 83415 USA.
RP Benson, MT (reprint author), Idaho Natl Lab, Interfacial Chem Dept, POB 1625, Idaho Falls, ID 83415 USA.
EM michael.benson@inl.gov
RI Benson, Michael/B-8855-2017
OI Benson, Michael/0000-0003-4927-614X
FU INL Laboratory Directed Research & Development (LDRD) Program under DOE
Idaho Operations Office [DE-AC07-05ID14517]
FX Work supported through the INL Laboratory Directed Research &
Development (LDRD) Program under DOE Idaho Operations Office Contract
DE-AC07-05ID14517.
NR 46
TC 13
Z9 13
U1 1
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0166-1280
J9 J MOL STRUC-THEOCHEM
JI Theochem-J. Mol. Struct.
PD OCT 30
PY 2008
VL 867
IS 1-3
BP 71
EP 77
DI 10.1016/j.theochem.2008.07.020
PG 7
WC Chemistry, Physical
SC Chemistry
GA 363LT
UT WOS:000260269500013
ER
PT J
AU Wang, B
Zhai, HJ
Huang, X
Wang, LS
AF Wang, Bin
Zhai, Hua-Jin
Huang, Xin
Wang, Lai-Sheng
TI On the Electronic Structure and Chemical Bonding in the Tantalum Trimer
Cluster
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID DENSITY-FUNCTIONAL THEORY; D-ORBITAL AROMATICITY; TRANSITION-METAL
CLUSTERS; AB-INITIO CALCULATIONS; PHOTOELECTRON-SPECTROSCOPY; OXIDE
CLUSTERS; QUINTUPLE BOND; IONIZATION-POTENTIALS; CARBIDE CLUSTERS; BORON
CLUSTERS
AB The electronic structure and chemical bonding in the Ta-3(-) cluster are investigated using photoelectron spectroscopy and density functional theory calculations. Photoelectron spectra are obtained for Ta3- at four photon energies: 532, 355, 266, and 193 nm. While congested spectra are observed at high electron binding energies, several low-lying electronic transitions are well resolved and compared with the theoretical calculations. The electron affinity of Ta-3 is determined to be 1.35 +/- 0.03 eV. Extensive density functional calculations are performed at the B3LYP/Stuttgart +2f 1g level to locate the ground-state and low-lying isomers for Ta-3 and Ta-3(-). The ground-state for the Ta-3(-) anion is shown to be a quintet ((5)A(1)') with D-3h symmetry, whereas two nearly isoenergetic states, C-2v ((4)A(1)) and D-3h ((6)A(1)'), are found to compete for the ground-state for neutral Ta-3. A detailed molecular orbital analysis is performed to elucidate the chemical boding in Ta-3(-), which is found to possess multiple d-orbital aromaticity, commensurate with its highly symmetric D-3h structure.
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 U.S. National Science Foundation [CHE-0749496]; Natural Science
Foundation of China [20641004, 20771026]; Natural Science Foundation of
Fujian Province [2008J0151]
FX The experimental work was supported by the U.S. National Science
Foundation (Grant CHE-0749496) and performed at the W. R. Wiley
Environmental Molecular Sciences Laboratory, a national scientific user
facility sponsored by the U.S. DOE's Office of Biological and
Environmental Research and located at the Pacific Northwest National
Laboratory, operated for DOE by Battelle. X.H. gratefully acknowledges
supports from the Natural Science Foundation of China (Grants 20641004
and 20771026) and the Natural Science Foundation of Fujian Province of
China (No. 2008J0151).
NR 67
TC 31
Z9 31
U1 5
U2 21
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 OCT 30
PY 2008
VL 112
IS 43
BP 10962
EP 10967
DI 10.1021/jp806166h
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 364TG
UT WOS:000260357600034
PM 18831541
ER
PT J
AU Verdaguer, A
Segura, JJ
Fraxedas, J
Bluhm, H
Salmeron, M
AF Verdaguer, Albert
Segura, Juan Jose
Fraxedas, Jordi
Bluhm, Hendrik
Salmeron, Miquel
TI Correlation between Charge State of Insulating NaCl Surfaces and Ionic
Mobility Induced by Water Adsorption: A Combined Ambient Pressure X-ray
Photoelectron Spectroscopy and Scanning Force Microscopy Study
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID NACL(100); PHOTOEMISSION; OXIDATION; CENTERS; FILMS
AB In situ ambient pressure X-ray photoelectron spectroscopy (APPES) and scanning force microscopy were used to characterize the surface discharge induced by water layers grown on (001) surfaces of sodium chloride single crystals. The APPES studies show that both kinetic energy (KE) and full width at half-maximum (FWHM) of the Na 2s and CI 2p core level peaks, monitored as a function of relative humidity (RH), mimic surface conductivity curves measured using scanning force microscopy. The KE position and FWHM of the core level peaks therefore are directly related to the solvation and diffusion of ions at the NaCl( 100) surface upon adsorption of water.
C1 [Verdaguer, Albert; Segura, Juan Jose; Fraxedas, Jordi] Esfera UAB, CIN2 CSIC ICN, Bellaterra 08193, Catalunya, Spain.
[Bluhm, Hendrik; Salmeron, Miquel] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Salmeron, Miquel] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
RP Verdaguer, A (reprint author), Esfera UAB, CIN2 CSIC ICN, Campus UAB,Edifici CM-7, Bellaterra 08193, Catalunya, Spain.
EM Albert.Verdaguer.ICN@uab.cat
RI Verdaguer, Albert/A-4303-2008; Segura, Juan Jose/H-3924-2011; Fraxedas,
Jordi/G-3135-2013
OI Verdaguer, Albert/0000-0002-4855-821X; Fraxedas,
Jordi/0000-0002-2821-4831
FU Ministerio, de Educacion y Ciencia (Spain) [FIS2006-12117-C04-01];
Generalitat de Catalunya [SGR 00909]; Director, Office of Science,
Office of Biological and Environmental Research; Office of Biological
and Environmental Research, the Materials Sciences Division and the
Chemical Sciences Divisions of the U.S. Department of Energy,; Spanish
Ramon y Cajal [DE-AC02-05CH11231]
FX This work was supported by the Ministerio, de Educacion y Ciencia
(Spain), through project FIS2006-12117-C04-01, by Generalitat de
Catalunya (SGR 00909) and by the Director, Office of Science, Office of
Biological and Environmental Research, the Materials Sciences Division
and the Chemical Sciences Divisions of the U.S. Department of Energy,
under Contract DE-AC02-05CH11231. A.V. acknowledges support front the
Spanish Ramon y Cajal Program and the mobility BE program from Agaur,
Generalitat de Catalunya. J.J.S. thanks the Consejo Superior de
Investigaciones Cientificas (CSIC) for a JAE DOC PhD grant.
NR 22
TC 12
Z9 12
U1 1
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 OCT 30
PY 2008
VL 112
IS 43
BP 16898
EP 16901
DI 10.1021/jp805444v
PG 4
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 364TI
UT WOS:000260357800027
ER
PT J
AU Duffin, AM
Saykally, RJ
AF Duffin, Andrew M.
Saykally, Richard J.
TI Electrokinetic Power Generation from Liquid Water Microjets
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID ENERGY-CONVERSION; NANOFLUIDIC CHANNELS; EFFICIENCY; SURFACES
AB Although electrokinetic effects are not new, only recently have they been investigated for possible use in energy conversion devices. We recently reported the electrokinetic generation of molecular hydrogen from rapidly flowing liquid water microjets [DUffin et al. J. PhYs. Chem. C 2007, 111, 12031]. Here, we describe the use of liquid water microjets for direct conversion of electrokinetic energy to electrical power. Previous studies of electrokinetic power production have reported low efficiencies (similar to 3%), limited by back conduction of ions at the surface and in the bulk liquid. Liquid microjets eliminate energy dissipation due to back conduction and, measuring only at the jet target, yield conversion efficiencies exceeding 10%.
C1 [Saykally, Richard J.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94618 USA.
RP Saykally, RJ (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM saykally@berkeley.edu
NR 19
TC 28
Z9 29
U1 1
U2 16
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 OCT 30
PY 2008
VL 112
IS 43
BP 17018
EP 17022
DI 10.1021/jp8015276
PG 5
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 364TI
UT WOS:000260357800044
ER
PT J
AU Martinez, A
Hinz, JM
Gomez, L
Molina, B
Acuna, H
Jones, IM
Frias, S
Coleman, MA
AF Martinez, Angelica
Hinz, John M.
Gomez, Laura
Molina, Bertha
Acuna, Hilda
Jones, Irene M.
Frias, Sara
Coleman, Matthew A.
TI Differential expression of TP53 associated genes in Fanconi anemia cells
after mitomycin C and hydroxyurea treatment
SO MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS
LA English
DT Article
DE Fanconi anemia; Hydroxyurea; Mitomycin C; TP53; Gene expression; Cell
cycle arrest; Apoptosis
ID DNA-REPLICATION; NUCLEAR-COMPLEX; BLOOM-SYNDROME; P53; PATHWAY; PROTEIN;
APOPTOSIS; SUSCEPTIBILITY; FANCD2; DAMAGE
AB Fanconi anemia (FA) is a rare, heritable chromosomal instability disease characterized by several congenital defects and cancer predisposition. Functional interactions between specific FA proteins and DNA damage response and repair activities have been reported, but the interplay between these mechanisms for maintaining genomic stability are not well understood. Many DNA damage response proteins are transcriptionally regulated by the tumor suppressor protein p53 (TP53), suggesting an important regulatory role for the DNA damage and stress response pathway. To better understand the association between FA and the DNA damage stress response we analyzed the levels of chromosomal damage and damage mediated gene transcription responses in lymphoblastoid cells derived from normal individuals and patients carrying the most common FA complementation group (FA-A). Chromosomal aberrations were first measured after exposure to mitomicyn C (MMC) or hydroxyurea (HU). Aliquots of the same cell were than assayed for the transcriptional response of 21 DNA damage and stress response genes using quantitative real-time PCR. The FA-A lymphoblastoid cells showed significant increases in the frequency of chromosome aberrations relative to non-FA-A lymphoblastoid lines after MMC treatment. The MMC induced damage was correlated with a general increase in expression of TP53-modulated DNA damage stress response genes involved in processes such as DNA repair, cell cycle progression, and apoptosis. Following HU treatment FA cells showed a decreased induction of CAs with much less transcriptional differences between targeted genes. Overall, the differences between the normal and FA-A cells after genotoxic treatments imply an increased activation and reliance of FA cells on the down-stream activities of TP53 for prevention of cell killing and chromosome damage from interstrand crosslinks but not for general replication arrest and double strand breaks. Furthermore, these results imply a regulatory connection between the FA pathway and activation of TP53 for responding to DNA damage. Alterations in the regulation of the DNA damage response may be related to the complex phenotypes seen in FA patients. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Jones, Irene M.; Coleman, Matthew A.] Lawrence Livermore Natl Lab, Chem Mat Earth & Life Sci Directorate, Livermore, CA USA.
[Martinez, Angelica; Gomez, Laura; Molina, Bertha; Acuna, Hilda; Frias, Sara] Inst Nacl Pediat, Lab Citogenet, Mexico City, DF, Mexico.
[Martinez, Angelica] Univ Nacl Autonoma Mexico, Posgrad Ciencias Biol, Mexico City 04510, DF, Mexico.
[Hinz, John M.] Washington State Univ, Sch Mol Biosci, Pullman, WA 99164 USA.
RP Coleman, MA (reprint author), Lawrence Livermore Natl Lab, Chem Mat Earth & Life Sci Directorate, Livermore, CA USA.
EM sarafrias@yahoo.com; coleman16@llnl.gov
OI Coleman, Matthew/0000-0003-1389-4018; Frias, Sara/0000-0002-3097-6368
FU Lawrence Livermore National Laboratory [DE-AC52-07NA27344]; Department
of Energy, Office of Science; Low Dose Radiation Research [KP110202];
CONACYT [44389]; SEP-CONACYT
FX This work performed under the auspices of the U.S. Department of Energy
by Lawrence Livermore National Laboratory under Contract
DE-AC52-07NA27344, with funding from the Department of Energy, Office of
Science and the Low Dose Radiation Research program grant KP110202, and
by CONACYT project 44389, SEP-CONACYT.
NR 44
TC 6
Z9 6
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1383-5718
J9 MUTAT RES-GEN TOX EN
JI Mutat. Res. Genet. Toxicol. Environ. Mutagen.
PD OCT 30
PY 2008
VL 656
IS 1-2
BP 1
EP 7
DI 10.1016/j.mrgentox.2008.06.012
PG 7
WC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology
SC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology
GA 370EY
UT WOS:000260746700001
PM 18647660
ER
PT J
AU Grimson, A
Srivastava, M
Fahey, B
Woodcroft, BJ
Chiang, HR
King, N
Degnan, BM
Rokhsar, DS
Bartel, DP
AF Grimson, Andrew
Srivastava, Mansi
Fahey, Bryony
Woodcroft, Ben J.
Chiang, H. Rosaria
King, Nicole
Degnan, Bernard M.
Rokhsar, Daniel S.
Bartel, David P.
TI Early origins and evolution of microRNAs and Piwi-interacting RNAs in
animals
SO NATURE
LA English
DT Article
ID ALGA CHLAMYDOMONAS-REINHARDTII; C-ELEGANS; GENOME; EXPRESSION;
DROSOPHILA; MECHANISM; EXPANSION; REVEALS; CONSERVATION; REPERTOIRE
AB In bilaterian animals, such as humans, flies and worms, hundreds of microRNAs ( miRNAs), some conserved throughout bilaterian evolution, collectively regulate a substantial fraction of the transcriptome. In addition to miRNAs, other bilaterian small RNAs, known as Piwi- interacting RNAs (piRNAs), protect the genome from transposons. Here we identify small RNAs from animal phyla that diverged before the emergence of the Bilateria. The cnidarian Nematostella vectensis ( starlet sea anemone), a close relative to the Bilateria, possesses an extensive repertoire of miRNA genes, two classes of piRNAs and a complement of proteins specific to small- RNA biology comparable to that of humans. The poriferan Amphimedon queenslandica ( sponge), one of the simplest animals and a distant relative of the Bilateria, also possesses miRNAs, both classes of piRNAs and a full complement of the small- RNA machinery. Animal miRNA evolution seems to have been relatively dynamic, with precursor sizes and mature miRNA sequences differing greatly between poriferans, cnidarians and bilaterians. Nonetheless, miRNAs and piRNAs have been available as classes of riboregulators to shape gene expression throughout the evolution and radiation of animal phyla.
C1 [Grimson, Andrew; Chiang, H. Rosaria; Bartel, David P.] Whitehead Inst Biomed Res, Cambridge, MA 02142 USA.
[Grimson, Andrew; Chiang, H. Rosaria; Bartel, David P.] MIT, Howard Hughes Med Inst, Dept Biol, Cambridge, MA 02139 USA.
[Fahey, Bryony; Woodcroft, Ben J.; Degnan, Bernard M.] Univ Queensland, Sch Integrat Biol, Brisbane, Qld 4072, Australia.
[Srivastava, Mansi; King, Nicole; Rokhsar, Daniel S.] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
[Srivastava, Mansi; King, Nicole; Rokhsar, Daniel S.] Univ Calif Berkeley, Ctr Integrat Genom, Berkeley, CA 94720 USA.
[Rokhsar, Daniel S.] Joint Genome Inst, Dept Energy, Walnut Creek, CA 94598 USA.
RP Bartel, DP (reprint author), Whitehead Inst Biomed Res, 9 Cambridge Ctr, Cambridge, MA 02142 USA.
EM dbartel@wi.mit.edu
FU NIH postdoctoral fellowship; NIH; Center for Integrative Genomics;
Gordon and Betty Moore Foundation; Australian Research Council
FX We thank M. Abedin and E. Begovic for preparing the Monosiga and
Trichoplax samples, respectively, W. Johnston for technical assistance,
and J. Grenier, C. Mayr, C. Jan and N. Lau for discussions. This work
was supported by an NIH postdoctoral fellowship (A.G.), and by grants
from the NIH (D.P.B.), Richard Melmon (M.S., N.K. and D.S.R.), the
Center for Integrative Genomics (M.S. and D.S.R.), the Gordon and Betty
Moore Foundation (N.K.) and the Australian Research Council (B.F.,
B.J.W. and B.M.D.). D.P.B. is an investigator of the Howard Hughes
Medical Institute.
NR 35
TC 343
Z9 415
U1 6
U2 53
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
J9 NATURE
JI Nature
PD OCT 30
PY 2008
VL 455
IS 7217
BP 1193
EP U15
DI 10.1038/nature07415
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 366DZ
UT WOS:000260462100034
PM 18830242
ER
PT J
AU Actis, S
Passarino, G
Sturm, C
Uccirati, S
AF Actis, Stefano
Passarino, Giampiero
Sturm, Christian
Uccirati, Sandro
TI Two-loop threshold singularities, unstable particles and complex masses
SO PHYSICS LETTERS B
LA English
DT Article
DE Feynman diagrams; Multi-loop calculations; Higgs physics
ID QUANTUM-FIELD THEORY; FEYNMAN DIAGRAMS; STANDARD MODEL; ELECTROWEAK
CORRECTIONS; NUMERICAL EVALUATION; RENORMALIZATION; CONFIGURATIONS;
VERTICES; PHYSICS; SCHEME
AB The effect of threshold singularities induced by unstable particles on two-loop observables is investigated and it is shown how to cure them working in the complex-mass scheme. The impact on radiative corrections around thresholds is thoroughly analyzed and shown to be relevant for two selected LHC and ILC applications: Higgs production via gluon fusion and decay into two photons at two loops in the Standard Model. Concerning Higgs production, it is essential to understand possible sources of large corrections in addition to the well-known QCD effects. It is shown that NLO electroweak corrections can incongruently reach a 10% level around the W W vector-boson threshold without a complete implementation of the complex-mass scheme in the two-loop calculation. (C) 2008 Elsevier BY. All rights reserved.
C1 [Actis, Stefano] Univ Aachen, Rhein Westfal TH Aachen, Inst Theoret Phys E, D-52056 Aachen, Germany.
[Passarino, Giampiero] Univ Turin, Dipartimento Fis Teor, Italy INFN, Sez Torino, I-10124 Turin, Italy.
[Sturm, Christian] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
[Uccirati, Sandro] Univ Karlsruhe, Inst Theoret Teilchenphys, D-76128 Karlsruhe, Germany.
RP Actis, S (reprint author), Univ Aachen, Rhein Westfal TH Aachen, Inst Theoret Phys E, D-52056 Aachen, Germany.
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; Passarino,
Giampiero/0000-0001-6379-4686
FU MIUR [2001023713_006]; European Community [MRTN-CT-2006-035505]; US
Department of Energy [DE-AC02-98CH10886]; Deutsche
Forschungsgemeinschaft; INFN
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 Computergestutzte Theoretische
Teilchenphysik. The authors thank the Galileo Galilei institute for
Theoretical Physics for hospitality and the INFN for partial support
during the completion of this work.
NR 37
TC 21
Z9 21
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD OCT 30
PY 2008
VL 669
IS 1
BP 62
EP 68
DI 10.1016/j.physletb.2008.09.028
PG 7
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 372BM
UT WOS:000260876400013
ER
PT J
AU Markert, C
Bellwied, R
Vitev, I
AF Markert, C.
Bellwied, R.
Vitev, I.
TI Formation and decay of hadronic resonances in the QGP
SO PHYSICS LETTERS B
LA English
DT Article
ID HEAVY-ION COLLISIONS; NUCLEAR-MATTER; FRAGMENTATION
AB Hadronic resonances can play a pivotal role in providing experimental evidence for partial chiral symmetry restoration in the deconfined quark-gluon phase produced at RHIC and the LHC. Their lifetimes, which are comparable to the lifetime of the partonic plasma phase, make them an invaluable tool to study medium modifications to the resonant state due to the chiral transition. In this Letter we show that the heavier, but still abundant, light and strange quark resonances K*, phi, Delta and Lambda* have large probability to be produced well within the plasma phase due to their short formation times. We demonstrate that, under particular kinematic conditions, these resonances can be formed and will decay inside the partonic state, but still carry sufficient momentum to not interact strongly with the hadronic medium after the QCD phase transition. Thus, K*, phi, Delta and Lambda* should exhibit the characteristic property modifications which can be attributed to chiral symmetry restoration, such as mass shifts, width broadening or branching ratio modifications. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Markert, C.] Univ Texas Austin, Dept Phys, Austin, TX 78702 USA.
[Bellwied, R.] Wayne State Univ, Dept Phys, Detroit, MI 48201 USA.
[Vitev, I.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Markert, C (reprint author), Univ Texas Austin, Dept Phys, Austin, TX 78702 USA.
EM cmarkert@physics.utexas.edu
FU US Department of Energy Office of Science [DE-AC52-06NA25396,
DE-FG02-94ER40845, DE-FG02-92FR40713]
FX We thank B.W. Zhang, H. Huang and C. Greiner for useful discussions.
This work is supported by the US Department of Energy Office of Science
under contracts Nos. DE-AC52-06NA25396, DE-FG02-94ER40845,and
DE-FG02-92FR40713.
NR 34
TC 26
Z9 26
U1 0
U2 0
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 OCT 30
PY 2008
VL 669
IS 1
BP 92
EP 97
DI 10.1016/j.physletb.2008.08.073
PG 6
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 372BM
UT WOS:000260876400018
ER
PT J
AU Alia-Klein, N
Kriplani, A
Pradhan, K
Ma, JY
Logan, J
Williams, B
Craig, IW
Telang, F
Tomasi, D
Goldstein, RZ
Wang, GJ
Volkow, ND
Fowler, JS
AF Alia-Klein, Nelly
Kriplani, Aarti
Pradhan, Kith
Ma, Jim Yeming
Logan, Jean
Williams, Benjamin
Craig, Ian W.
Telang, Frank
Tomasi, Dardo
Goldstein, Rita Z.
Wang, Gene-Jack
Volkow, Nora D.
Fowler, Joanna S.
TI The MAO-A genotype does not modulate resting brain metabolism in adults
SO PSYCHIATRY RESEARCH-NEUROIMAGING
LA English
DT Article
DE MAO-A; FDG; Baseline
ID MONOAMINE-OXIDASE; GENETIC-VARIATION; IMPULSIVITY; ATTENTION; PROMOTER;
BEHAVIOR; VIOLENCE; HUMANS; RISK
AB Variation in the monoamine-oxidase-A (MAO-A) gene has been associated with volumetric changes in corticolimbic regions with differences in their response to relevant emotional tasks. Here we show no changes in baseline regional brain metabolism as a function of genotype indicating that, unchallenged, corticolimbic activity is not modulated by the MAO-A genotype. Published by Elsevier Ireland Ltd.
C1 [Alia-Klein, Nelly; Kriplani, Aarti; Pradhan, Kith; Ma, Jim Yeming; Logan, Jean; Telang, Frank; Tomasi, Dardo; Goldstein, Rita Z.; Wang, Gene-Jack; Fowler, Joanna S.] Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA.
[Williams, Benjamin; Craig, Ian W.] Kings Coll London, Dept Psychiat, London SE5 8AF, England.
[Wang, Gene-Jack; Fowler, Joanna S.] Mt Sinai Sch Med, New York, NY 10029 USA.
[Volkow, Nora D.] NIDA, Bethesda, MD 20892 USA.
RP Alia-Klein, N (reprint author), Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA.
EM nellyklein@bnl.gov
RI Tomasi, Dardo/J-2127-2015;
OI Craig, Ian/0000-0002-4063-1005; Logan, Jean/0000-0002-6993-9994
FU Brookhaven National Laboratory [DE-AC-298CH 10886]; Office of Biological
and Environmental Research; NIH-NIDA [K05DA020001]; NIH CGRC
[MOIRR10710]; National Association for Research oil Schizophrenia and
Depression (NARSAD)
FX This work was carried out at Brookhaven National Laboratory under
contract DE-AC-298CH 10886 with the U.S. Department of Energy and
supported by its Office of Biological and Environmental Research and by
NIH-NIDA (K05DA020001), NIH CGRC (MOIRR10710) and by the National
Association for Research oil Schizophrenia and Depression (NARSAD). We
thank the PET team for tile advice and assistance in different aspects
of these studies. We are also grateful to the subjects who volunteered
for these studies.
NR 22
TC 9
Z9 10
U1 2
U2 3
PU ELSEVIER IRELAND LTD
PI CLARE
PA ELSEVIER HOUSE, BROOKVALE PLAZA, EAST PARK SHANNON, CO, CLARE, 00000,
IRELAND
SN 0925-4927
J9 PSYCHIAT RES-NEUROIM
JI Psychiatry Res. Neuroimaging
PD OCT 30
PY 2008
VL 164
IS 1
BP 73
EP 76
DI 10.1016/j.pscychresns.2007.12.010
PG 4
WC Clinical Neurology; Neuroimaging; Psychiatry
SC Neurosciences & Neurology; Psychiatry
GA 374DV
UT WOS:000261023800006
PM 18706791
ER
PT J
AU Mukhopadhyaya, S
Tsang, YW
AF Mukhopadhyaya, Sumith
Tsang, Yvonne W.
TI Determination of transport properties from flowing fluid temperature
logging in unsaturated fractured rocks: Theory and semi-analytical
solution
SO WATER RESOURCES RESEARCH
LA English
DT Article
ID BOREHOLE TEMPERATURES; GROUNDWATER-FLOW; YUCCA MOUNTAIN; CLIMATE-CHANGE;
SYSTEMS; EXAMPLE; UTAH; TUFF
AB Flowing fluid temperature logging (FFTL) has recently been proposed as a method to locate flowing fractures. We argue that FFTL, backed up by data from high-precision distributed temperature sensors, can be a useful tool in locating flowing fractures and in estimating the transport properties of unsaturated fractured rocks. We have developed the theoretical background needed to analyze data from FFTL. In this article, we present a simplified conceptualization of FFTL in unsaturated fractured rock and develop a semi-analytical solution for spatial and temporal variations of pressure and temperature inside a borehole in response to an applied perturbation (pumping of air from the borehole). We compare the semi-analytical solution with predictions from the TOUGH2 numerical simulator. On the basis of the semi-analytical solution, we propose a method to estimate the permeability of the fracture continuum surrounding the borehole. Using this proposed method, we estimated the effective fracture continuum permeability of the unsaturated rock hosting the Drift Scale Test (DST) at Yucca Mountain, Nevada. Our estimate compares well with previous independent estimates for fracture permeability of the DST host rock. The conceptual model of FFTL presented in this article is based on the assumptions of single-phase flow, convection-only heat transfer, and negligible change in system state of the rock formation. In a sequel article, we extend the conceptual model to evaluate some of these assumptions. In that paper, we also perform inverse modeling of FFTL data to estimate, in addition to permeability, other transport parameters (such as porosity and thermal conductivity) of unsaturated fractured rocks.
C1 [Mukhopadhyaya, Sumith; Tsang, Yvonne W.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Mukhopadhyaya, S (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, 1 Cyclotron Rd,MS-90R1116, Berkeley, CA 94720 USA.
EM smukhopadhyay@lbl.gov
NR 37
TC 1
Z9 1
U1 0
U2 1
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 OCT 30
PY 2008
VL 44
IS 10
AR W10424
DI 10.1029/2008WR006860
PG 14
WC Environmental Sciences; Limnology; Water Resources
SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water
Resources
GA 368EU
UT WOS:000260604900001
ER
PT J
AU Maslov, S
Redner, S
AF Maslov, Sergei
Redner, Sidney
TI Promise and Pitfalls of Extending Google's PageRank Algorithm to
Citation Networks
SO JOURNAL OF NEUROSCIENCE
LA English
DT Editorial Material
C1 [Redner, Sidney] Boston Univ, Ctr Polymer Studies, Boston, MA 02215 USA.
[Redner, Sidney] Boston Univ, Dept Phys, Boston, MA 02215 USA.
[Maslov, Sergei] Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA.
RP Redner, S (reprint author), Boston Univ, Ctr Polymer Studies, Boston, MA 02215 USA.
EM redner@bu.edu
RI Maslov, Sergei/C-2397-2009
OI Maslov, Sergei/0000-0002-3701-492X
NR 10
TC 42
Z9 42
U1 2
U2 26
PU SOC NEUROSCIENCE
PI WASHINGTON
PA 11 DUPONT CIRCLE, NW, STE 500, WASHINGTON, DC 20036 USA
SN 0270-6474
J9 J NEUROSCI
JI J. Neurosci.
PD OCT 29
PY 2008
VL 28
IS 44
BP 11103
EP 11105
DI 10.1523/JNEUROSCI.0002-08.2008
PG 3
WC Neurosciences
SC Neurosciences & Neurology
GA 366RZ
UT WOS:000260502400001
PM 18971452
ER
PT J
AU Dagotto, E
Yunoki, S
Sen, C
Alvarez, G
Moreo, A
AF Dagotto, Elbio
Yunoki, Seiji
Sen, Cengiz
Alvarez, Gonzalo
Moreo, Adriana
TI Recent developments in the theoretical study of phase separation in
manganites and underdoped cuprates
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
AB This paper is a brief review of the status of 'phase separation' ideas in manganites and cuprates, mainly focused on the recent efforts by the authors. It is argued that in the last year considerable progress has been made in the understanding of manganites, since the famous colossal magnetoresistance peak in the resistivity versus temperature has been numerically observed in unbiased Monte Carlo simulations using realistic models (namely, including double exchange, phonons, and quenched disorder). It is also conjectured that a phenomenology similar to the one found in manganites could be present in the underdoped regime of the cuprates. It is predicted that a state with superconducting patches exists above the critical temperature in the underdoped regime, in agreement with recent scanning tunneling microscopy experiments.
C1 [Dagotto, Elbio; Yunoki, Seiji; Moreo, Adriana] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Dagotto, Elbio; Yunoki, Seiji; Moreo, Adriana] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
[Sen, Cengiz] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
[Sen, Cengiz] Florida State Univ, Dept Phys, Tallahassee, FL 32310 USA.
[Alvarez, Gonzalo] Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA.
[Alvarez, Gonzalo] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Dagotto, E (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
EM edagotto@utk.edu
RI Yunoki, Seiji/B-1831-2008
FU NSF [DMR-0443144, DMR-0706020]; Division of Materials Sciences and
Engineering of the Department of Energy, USA; Cray XT3; National Center
for Computational Sciences at Oak Ridge National Laboratory
FX This research has been supported mainly by NSF via grants DMR-0443144
and DMR-0706020. This effort has also been sponsored by the Division of
Materials Sciences and Engineering of the Department of Energy, USA.
Most of the computational work was performed on the Cray XT3 of the
National Center for Computational Sciences at Oak Ridge National
Laboratory.
NR 15
TC 11
Z9 11
U1 3
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD OCT 29
PY 2008
VL 20
IS 43
AR 434224
DI 10.1088/0953-8984/20/43/434224
PG 7
WC Physics, Condensed Matter
SC Physics
GA 358MZ
UT WOS:000259922600025
ER
PT J
AU Ederer, C
Fennie, CJ
AF Ederer, Claude
Fennie, Craig J.
TI Electric-field switchable magnetization via the Dzyaloshinskii-Moriya
interaction: FeTiO3 versus BiFeO3
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID THIN-FILM HETEROSTRUCTURES; PHASE-TRANSITIONS; TEMPERATURE;
FERROMAGNETISM; POLARIZATION; DIFFRACTION; CRYSTAL; DOMAINS
AB In this paper we review and discuss a mechanism for coupling between electric polarization and magnetization that can ultimately lead to electric-field switchable magnetization. The basic idea is that a ferroelectric distortion in an antiferromagnetic material can 'switch on' the Dzyaloshinskii-Moriya interaction which leads to a canting of the antiferromagnetic sublattice magnetizations, and thus to a net magnetization. This magnetization (M) over right arrow M is coupled to the polarization (P) over right arrow P via a trilinear free energy contribution of the form (P) over right arrow (M) over right arrow (L) over right arrow where (L) over right arrow is the antiferromagnetic order parameter. In particular, we discuss why such an invariant is present in R3c FeTiO3 but not in the isostructural multiferroic BiFeO3. Finally, we construct symmetry groups that in general allow for this kind of ferroelectrically-induced weak ferromagnetism.
C1 [Ederer, Claude] Trinity Coll Dublin, Sch Phys, Dublin 2, Ireland.
[Fennie, Craig J.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Ederer, C (reprint author), Trinity Coll Dublin, Sch Phys, Dublin 2, Ireland.
EM edererc@tcd.ie; fennie@anl.gov
RI Ederer, Claude/F-5420-2010
FU Science Foundation Ireland; Irish National Development Plan; Center for
Nanoscale Materials; US DOE, Office of Science, Basic Energy Sciences
[DE-AC02-06CH11357]
FX CE acknowledges financial support by Science Foundation Ireland and the
Irish National Development Plan. Work at the Center for Nanoscale
Materials was supported by US DOE, Office of Science, Basic Energy
Sciences under Contract No. DE-AC02-06CH11357.
NR 42
TC 57
Z9 57
U1 6
U2 46
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD OCT 29
PY 2008
VL 20
IS 43
AR 434219
DI 10.1088/0953-8984/20/43/434219
PG 8
WC Physics, Condensed Matter
SC Physics
GA 358MZ
UT WOS:000259922600020
ER
PT J
AU Martin, L
Crane, SP
Chu, YH
Holcomb, MB
Gajek, M
Huijben, M
Yang, CH
Balke, N
Ramesh, R
AF Martin, L. W.
Crane, S. P.
Chu, Y-H
Holcomb, M. B.
Gajek, M.
Huijben, M.
Yang, C-H
Balke, N.
Ramesh, R.
TI Multiferroics and magnetoelectrics: thin films and nanostructures
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Review
ID CHEMICAL-VAPOR-DEPOSITION; YMNO3 EPITAXIAL-FILMS; CRYSTAL-STRUCTURE;
FERROELECTRIC PROPERTIES; MAGNETIC FERROELECTRICS; ELECTRIC
POLARIZATION; DOMAIN CONTROL; EXCHANGE BIAS; BIFEO3 FILMS; PEROVSKITE
AB Multiferroic materials, or materials that simultaneously possess two or more ferroic order parameters, have returned to the forefront of materials research. Driven by the desire to achieve new functionalities-such as electrical control of ferromagnetism at room temperature-researchers have undertaken a concerted effort to identify and understand the complexities of multiferroic materials. The ability to create high quality thin film multiferroics stands as one of the single most important landmarks in this flurry of research activity. In this review we discuss the basics of multiferroics including the important order parameters and magnetoelectric coupling in materials. We then discuss in detail the growth of single phase, horizontal multilayer, and vertical heterostructure multiferroics. The review ends with a look to the future and how multiferroics can be used to create new functionalities in materials.
C1 [Martin, L. W.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Martin, L (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
EM lwmartin@lbl.gov
RI YANG, CHAN-HO/C-2079-2011; Martin, Lane/H-2409-2011; Ying-Hao,
Chu/A-4204-2008; Balke, Nina/Q-2505-2015;
OI Martin, Lane/0000-0003-1889-2513; Ying-Hao, Chu/0000-0002-3435-9084;
Balke, Nina/0000-0001-5865-5892; Holcomb, Mikel/0000-0003-2111-3410
FU Office of Basic Energy Sciences, Materials Science Division of the US
Department of Energy [DE-AC0205CH11231]; ONR-MURI [E21-6RU-G4]; Western
Institute of Nanoelectronics program
FX The authors acknowledge the support of the Director, Office of Basic
Energy Sciences, Materials Science Division of the US Department of
Energy under Contract No. DE-AC0205CH11231 and previous contracts,
ONR-MURI under Grant No. E21-6RU-G4 and previous contracts, and the
Western Institute of Nanoelectronics program.
NR 124
TC 168
Z9 171
U1 15
U2 219
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 OCT 29
PY 2008
VL 20
IS 43
AR 434220
DI 10.1088/0953-8984/20/43/434220
PG 13
WC Physics, Condensed Matter
SC Physics
GA 358MZ
UT WOS:000259922600021
ER
PT J
AU Picozzi, S
Yamauchi, K
Sergienko, IA
Sen, C
Sanyal, B
Dagotto, E
AF Picozzi, Silvia
Yamauchi, Kunihiko
Sergienko, Ivan A.
Sen, Cengiz
Sanyal, Biplab
Dagotto, Elbio
TI Microscopic mechanisms for improper ferroelectricity in multiferroic
perovskites: a theoretical review
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Review
ID AUGMENTED-WAVE METHOD; WEAK FERROMAGNETISM; POLARIZATION; MANGANITES
AB Two microscopic mechanisms helping us to understand the multiferroic behavior of distorted rare-earth manganites are here briefly reviewed. The original work was carried out by means of Hamiltonian modeling and first-principles density functional simulations. Our first topic concerns the link between the Dzyaloshinskii-Moriya interaction and ferroelectricity in incommensurate magnets. We argue that the Dzyaloshinskii-Moriya interaction may play a key role since (i) it induces ferroelectric displacements of oxygen atoms and (ii) it favors the stabilization of a helical magnetic structure at low temperatures. Our second topic concerns the prediction, based on Landau theory, that the symmetry of the zigzag spin chains in the AFM-E (E-type antiferromagnetic) orthorhombic manganites (such as HoMnO(3)) allows a finite polarization along the c axis. The microscopic mechanism at the basis of ferroelectricity is interpreted through a gain in band energy of the e(g) electrons within the orbitally degenerate double-exchange model. Related Monte Carlo simulations have confirmed that the polarization can be much higher than what is observed in spiral magnetic phases. Density functional calculations performed on orthorhombic HoMnO(3) quantitatively confirm a magnetically induced ferroelectric polarization up to similar to 6 mu C cm(-2), the largest reported so far for improper magnetic ferroelectrics. We find in HoMnO(3), in addition to the conventional displacement mechanism, a sizable contribution arising from the purely electronic effect of orbital polarization. The relatively large ferroelectric polarization, present even with centrosymmetric atomic positions, is a clear sign of a magnetism-induced electronic mechanism at play, which is also confirmed by the large displacements of the Wannier function centers with respect to the corresponding ions in AFM-E HoMnO(3). The final polarization is shown to be the result of competing effects, as shown by the opposite signs of the eg and t(2g) contributions to the ferroelectric polarization.
C1 [Picozzi, Silvia; Yamauchi, Kunihiko] Univ Aquila, Dipartimento Fis, CASTI Reg Lab, CNR INFM, I-67100 Laquila, Italy.
[Sergienko, Ivan A.; Sen, Cengiz; Dagotto, Elbio] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
[Sergienko, Ivan A.; Sen, Cengiz; Dagotto, Elbio] Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA.
[Sanyal, Biplab] Uppsala Univ, Dept Phys, Theoret Magnetism Grp, SE-75121 Uppsala, Sweden.
RP Picozzi, S (reprint author), Univ Aquila, Dipartimento Fis, CASTI Reg Lab, CNR INFM, I-67100 Laquila, Italy.
EM silvia.picozzi@aquila.infn.it
RI Yamauchi, Kunihiko/A-6324-2009; Sanyal, Biplab/G-4416-2011; Picozzi,
Silvia/E-2374-2011; Yamauchi, Kunihiko/E-5833-2010
OI Sanyal, Biplab/0000-0002-3687-4223; Picozzi, Silvia/0000-0002-3232-788X;
Yamauchi, Kunihiko/0000-0003-4164-4569
FU NSF [DMR-0706020]; Division of Materials Science and Engineering, US
DOE; UT-Battelle, LLC; Barcelona Supercomputing Center and from CINECA
(Bologna, Italy)
FX This work was supported in part by the NSF grant DMR-0706020 and by the
Division of Materials Science and Engineering, US DOE, under contract
with UT-Battelle, LLC. Computational support from the Barcelona
Supercomputing Center and from CINECA (Bologna, Italy) is gratefully
acknowledged.
NR 36
TC 27
Z9 27
U1 6
U2 58
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD OCT 29
PY 2008
VL 20
IS 43
AR 434208
DI 10.1088/0953-8984/20/43/434208
PG 10
WC Physics, Condensed Matter
SC Physics
GA 358MZ
UT WOS:000259922600009
ER
PT J
AU Kuhn, JN
Huang, WY
Tsung, CK
Zhang, YW
Somorjai, GA
AF Kuhn, John N.
Huang, Wenyu
Tsung, Chia-Kuang
Zhang, Yawen
Somorjai, Gabor A.
TI Structure Sensitivity of Carbon-Nitrogen Ring Opening: Impact of
Platinum Particle Size from below 1 to 5 nm upon Pyrrole Hydrogenation
Product Selectivity over Monodisperse Platinum Nanoparticles Loaded onto
Mesoporous Silica
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID DENDRIMER-ENCAPSULATED NANOPARTICLES; CATALYTIC-ACTIVITY;
HYDRODENITROGENATION; KINETICS
AB Well-defined platinum nanoparticles between 0.8 and 5.0 nm were prepared using dendrimer and polymer capping agents and supported onto mesoporous SBA-15 silica. Using these model catalysts, pyrrole hydrogenation was demonstrated to be structure sensitive because ring opening occurred more easily over larger particles compared to smaller ones. The phenomenon is caused by surface roughness or electronic effects that change with particle size.
C1 [Somorjai, Gabor A.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
Lawrence Berkeley Natl Lab, Div Chem & Mat Sci, Berkeley, CA 94720 USA.
RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM somorjai@berkeley.edu
RI Huang, Wenyu/L-3784-2014
OI Huang, Wenyu/0000-0003-2327-7259
FU U.S. DOE [DE-AC03-76SF00098, DEAC02-05CH11231]
FX We acknowledge support from the Director, Office of Science, Office of
Basic Energy Sciences, Division of Chemical Sciences, Geological and
Biosciences of the U.S. DOE under Contract DE-AC03-76SF00098 and the
Director, Office of Science, Office of Basic Energy Sciences, Division
of Materials Sciences and Engineering of the U.S. DOE under Contract No.
DEAC02-05CH11231. Additional support from Chevron is also appreciated.
We also thank the Molecular Foundry of the LBNL and Prof. A. Paul
Alivisatos for use of facilities. Y.W.Z. thanks the Huaxin Distinguished
Scholar Award from Peking University Education Foundation of China.
NR 18
TC 121
Z9 121
U1 8
U2 67
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 OCT 29
PY 2008
VL 130
IS 43
BP 14026
EP +
DI 10.1021/ja805050c
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 363XV
UT WOS:000260301700003
PM 18834126
ER
PT J
AU Peckys, DB
de Jonge, N
Simpson, ML
McKnight, TE
AF Peckys, Diana B.
de Jonge, Niels
Simpson, Michael L.
McKnight, Timothy E.
TI End-specific strategies of attachment of long double stranded DNA onto
gold-coated nanofiber arrays
SO NANOTECHNOLOGY
LA English
DT Article
ID ATOMIC-FORCE MICROSCOPY; CARBON NANOTUBES; GENE DELIVERY; PLASMID DNA;
SURFACES; BINDING; ELECTRODE; TRACKING; CELLS
AB We report the effective and site-specific binding of long double stranded (ds) DNA to high aspect ratio carbon nanofiber arrays. The carbon nanofibers were first coated with a thin gold layer to provide anchorage for two controllable binding methods. One method was based on the direct binding of thiol end-labeled dsDNA. The second and enhanced method used amine end-labeled dsDNA bound with crosslinkers to a carboxyl-terminated self-assembled monolayer. The bound dsDNA was first visualized with a fluorescent, dsDNA-intercalating dye. The specific binding onto the carbon nanofiber was verified by a high resolution detection method using scanning electron microscopy in combination with the binding of neutravidin-coated fluorescent microspheres to the immobilized and biotinylated dsDNA. Functional activity of thiol end-labeled dsDNA on gold-coated nanofiber arrays was verified with a transcriptional assay, whereby Chinese hamster lung cells (V79) were impaled upon the DNA-modified nanofibers and scored for transgene expression of the tethered template. Thiol end-labeled dsDNA demonstrated significantly higher expression levels than nanofibers prepared with control dsDNA that lacked a gold-binding end-label. Employing these site-specific and robust techniques of immobilization of dsDNA onto nanodevices can be of advantage for the study of DNA/protein interactions and for gene delivery applications.
C1 [Peckys, Diana B.; de Jonge, Niels] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Peckys, Diana B.; Simpson, Michael L.] Univ Tennessee, Knoxville, TN 37996 USA.
[de Jonge, Niels] Vanderbilt Univ, Sch Med, Nashville, TN 37232 USA.
[Simpson, Michael L.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
[McKnight, Timothy E.] Oak Ridge Natl Lab, Measurement Sci & Syst Engn Div, Oak Ridge, TN 37831 USA.
RP Peckys, DB (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
EM peckysdb@ornl.gov
RI de Jonge, Niels/B-5677-2008; Simpson, Michael/A-8410-2011; McKnight,
Tim/H-3087-2011; Peckys, Diana/B-4642-2015
OI Simpson, Michael/0000-0002-3933-3457; McKnight, Tim/0000-0003-4326-9117;
FU NIBIB [R01EB006316]; Oak Ridge National Laboratory; US Department of
Energy; DOE Office of Science; Basic Energy Sciences; Division of
Scientific User Facilities
FX The authors are grateful to A V Melechko, G M Veith, T Subich, D
Hensley, D Thomas, and P Fleming for assistance with nanofiber
fabrication. This study was supported by grant R01EB006316 (NIBIB) and
through the Laboratory Directed Research and Development funding program
of the Oak Ridge National Laboratory, which is managed for the US
Department of Energy by UT-Battelle, LLC. MLS acknowledges support from
the Material Sciences and Engineering Division Program of the DOE Office
of Science. A portion of this research was conducted at the Center for
Nanophase Materials Sciences, which is sponsored by the US Department of
Energy, Basic Energy Sciences, Division of Scientific User Facilities.
NR 37
TC 8
Z9 8
U1 0
U2 12
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-4484
J9 NANOTECHNOLOGY
JI Nanotechnology
PD OCT 29
PY 2008
VL 19
IS 43
AR 435301
DI 10.1088/0957-4484/19/43/435301
PG 9
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA 352HK
UT WOS:000259486700007
PM 21832688
ER
PT J
AU Sutter, E
Ozturk, B
Sutter, P
AF Sutter, Eli
Ozturk, Birol
Sutter, Peter
TI Selective growth of Ge nanowires by low-temperature thermal evaporation
SO NANOTECHNOLOGY
LA English
DT Article
ID FIELD-EFFECT TRANSISTORS; GERMANIUM NANOWIRES; SEMICONDUCTOR NANOWIRES;
SILICON NANOWIRES; TRANSPORT
AB High-quality single-crystalline Ge nanowires with electrical properties comparable to those of bulk Ge have been synthesized by vapor-liquid-solid growth using Au growth seeds on SiO(2)/Si(100) substrates and evaporation from solid Ge powder in a low-temperature process at crucible temperatures down to 700 degrees C. High nanowire growth rates at these low source temperatures have been identified as being due to sublimation of GeO from substantial amounts of GeO(2) on the powder. The Ge nanowire synthesis from GeO is highly selective at our substrate temperatures (420-500 degrees C), i.e., occurs only on Au vapor-liquid-solid growth seeds. For growth of nanowires of 10-20 mu m length on Au particles, an upper bound of 0.5 nm Ge deposition was determined in areas of bare SiO(2)/Si substrate without Au nanoparticles.
C1 [Sutter, Eli; Ozturk, Birol; Sutter, Peter] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
RP Sutter, E (reprint author), Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
EM esutter@bnl.gov
FU US Department of Energy [DE-AC02-98CH1-886]
FX Work performed under the auspices of the US Department of Energy under
contract No. DE-AC02-98CH1-886.
NR 33
TC 22
Z9 23
U1 1
U2 9
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-4484
J9 NANOTECHNOLOGY
JI Nanotechnology
PD OCT 29
PY 2008
VL 19
IS 43
AR 435607
DI 10.1088/0957-4484/19/43/435607
PG 6
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA 352HK
UT WOS:000259486700022
PM 21832702
ER
PT J
AU Wang, SF
Zhang, X
Mao, X
Zeng, QX
Xu, H
Lin, YH
Chen, W
Liu, GD
AF Wang, Shengfu
Zhang, Xing
Mao, Xun
Zeng, Qingxiang
Xu, Hui
Lin, Yuehe
Chen, Wei
Liu, Guodong
TI Electrochemical immunoassay of carcinoembryonic antigen based on a lead
sulfide nanoparticle label
SO NANOTECHNOLOGY
LA English
DT Article
ID TUMOR-MARKERS; LUNG-CARCINOMA; COLLOIDAL GOLD; PLEURAL FLUID;
IMMUNOSENSOR; SERUM; CANCER; CA-19-9; ASSAY; CEA
AB We describe a lead sulfide nanoparticle (PbS NP)-based electrochemical immunoassay to detect a tumor biomarker, carcinoembryonic antigen (CEA). Cubic PbS NPs were prepared and functionalized with thioglycolic acid (TGA), which stabilized the formed NPs and offered carboxyl groups to conjugate with CEA antibodies. PbS NP conjugated with monoclonal CEA antibody was used as a label in an immunorecognition event. After a complete sandwich immunoreaction among the primary CEA antibody (immobilized on the carboxyl-modified magnetic beads), CEA and the PbS-labeled secondary antibody (PbS-anti-CEA), PbS labels were captured to the magnetic-bead (MB) surface through the antibody-antigen immunocomplex. Electrochemical stripping analysis of the captured PbS was used to quantify the concentration of CEA after an acid-dissolution step. The MBs and the magnetic separation platform were used to integrate a facile antibody immobilization with immunoreactions and the isolation of immunocomplexes from reaction solutions in the immunoassay. The voltammetric response is highly linear over the range of 1-50 ng ml(-1) CEA, and the limit of detection is estimated to be 0.5 ng ml(-1). The performance of this nanoparticle-based electrochemical immunoassay was successfully evaluated with human serum spiked with CEA, indicating that this convenient and sensitive technique offers great promise for rapid, simple and cost-effective analysis of tumor biomarkers in biological fluids.
C1 [Zhang, Xing; Chen, Wei] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA.
[Wang, Shengfu; Mao, Xun; Zeng, Qingxiang; Xu, Hui] N Dakota State Univ, Dept Chem & Mol Biol, Fargo, ND 58105 USA.
[Wang, Shengfu; Zeng, Qingxiang; Xu, Hui] Hubei Univ, Coll Chem & Chem Engn, Wuhan 430062, Peoples R China.
[Lin, Yuehe; Liu, Guodong] Pacific NW Natl Lab, Richland, WA 99354 USA.
RP Chen, W (reprint author), Univ Texas Arlington, Dept Phys, POB 19059, Arlington, TX 76019 USA.
EM weichen@uta.edu; guodong.liu@ndsu.edu
RI Lin, Yuehe/D-9762-2011
OI Lin, Yuehe/0000-0003-3791-7587
FU North Dakota Experimental Program; North Dakota State University; UTA;
NSF; DHS [CBET-0736172]; DOD [HDTRA1-08-P-0034]; DOD Congressionally
Directed Medical Research Programs [W81XWH-08-1-0450]; National Natural
Science Foundation of China [20575017]; PNNL LDRD; DOE
[DE-AC05-76RL01830]
FX GL acknowledges the financial support from the North Dakota Experimental
Program to Stimulate Competitive Research (EPSCoR) and new faculty
startup funds of North Dakota State University. WC would like to thank
support from the Startup and LERR Funds from UTA, the NSF and DHS joint
program (CBET-0736172), DOD HDTRA1-08-P-0034 and the DOD Congressionally
Directed Medical Research Programs (W81XWH-08-1-0450). SW acknowledges
the financial support from the National Natural Science Foundation of
China (no. 20575017). YL would like to acknowledge support from a PNNL
LDRD program. PNNL is operated by Battelle for DOE under contract
DE-AC05-76RL01830.
NR 37
TC 9
Z9 9
U1 0
U2 23
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-4484
EI 1361-6528
J9 NANOTECHNOLOGY
JI Nanotechnology
PD OCT 29
PY 2008
VL 19
IS 43
AR 435501
DI 10.1088/0957-4484/19/43/435501
PG 6
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA 352HK
UT WOS:000259486700014
PM 21832695
ER
PT J
AU Yim, TJ
Wang, Y
Zhang, X
AF Yim, Tae-Jin
Wang, Yuan
Zhang, Xiang
TI Synthesis of a gold nanoparticle dimer plasmonic resonator through
two-phase-mediated functionalization
SO NANOTECHNOLOGY
LA English
DT Article
ID SOLID-PHASE SYNTHESIS; RAMAN-SCATTERING; SPECTROSCOPY; HETERODIMERS;
INTERFACES; DYNAMICS; SIZE
AB We report that Au nanoparticles, ligand-exchanged with a thiol ligand at the liquid-liquid interface, were dimerized using an N, N'-diisopropylcarbodiimide-mediated amide bond formation. This dimerization of 60 nm sized Au nanoparticles achieved 24% overall yield and was visually confirmed by transmission electron microscopy as well as by scanning electron microscopy images. The resultant electromagnetic field enhancement of a single Au nanoparticle dimer was proven by dark field spectroscopy which, in turn, made the Au nanoparticle dimer suitable for molecular sensing applications, such as in surface enhanced Raman spectroscopy. Our dimerization method demonstrated that the synthesis of Au nanoparticle dimers with a high yield and enhanced optical properties of the dimers were possible. Our methodology also has good prospects as regards the formation of nanoscale building blocks.
C1 [Yim, Tae-Jin; Wang, Yuan; 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, Berkeley, CA 94720 USA.
EM xiang@berkeley.edu
RI Zhang, Xiang/F-6905-2011; Wang, Yuan/F-7211-2011
FU National Institutes of Health [PN2 EY018228]
FX We thank the National Institutes of Health through the NIH Roadmap for
Medical Research (PN2 EY018228) for support.
NR 31
TC 20
Z9 20
U1 0
U2 24
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-4484
J9 NANOTECHNOLOGY
JI Nanotechnology
PD OCT 29
PY 2008
VL 19
IS 43
AR 435605
DI 10.1088/0957-4484/19/43/435605
PG 6
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA 352HK
UT WOS:000259486700020
PM 20737026
ER
PT J
AU Wang, D
Kopidakis, N
Reese, MO
Gregg, BA
AF Wang, Dong
Kopidakis, Nikos
Reese, Matthew O.
Gregg, Brian A.
TI Treating Poly(3-hexylthiophene) with Dimethylsulfate Improves Its
Photoelectrical Properties
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID ORGANIC SOLAR-CELLS; REGIOREGULAR POLY(3-HEXYLTHIOPHENE);
HETEROJUNCTION; FILMS
C1 [Wang, Dong; Kopidakis, Nikos; Reese, Matthew O.; Gregg, Brian A.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Gregg, BA (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
RI Kopidakis, Nikos/N-4777-2015
NR 25
TC 27
Z9 27
U1 1
U2 14
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 OCT 28
PY 2008
VL 20
IS 20
BP 6307
EP 6309
DI 10.1021/cm8015676
PG 3
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 363FY
UT WOS:000260254400007
ER
PT J
AU Ruddy, DA
Jarupatrakorn, J
Rioux, RM
Miller, JT
McMurdo, MJ
Mcbee, JL
Tupper, KA
Tilley, TD
AF Ruddy, Daniel A.
Jarupatrakorn, Jonggol
Rioux, Robert M.
Miller, Jeffrey T.
McMurdo, Meredith J.
McBee, Jennifer L.
Tupper, Karl A.
Tilley, T. Don
TI Site-Isolated Pt-SBA15 Materials from Tris(tert-butoxy)siloxy Complexes
of Pt(II) and Pt(IV)
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID SURFACE ORGANOMETALLIC CHEMISTRY; MONODISPERSED PLATINUM CLUSTERS;
RAY-ABSORPTION SPECTROSCOPY; GAS SHIFT REACTION; MOLECULAR PRECURSOR;
MESOPOROUS SILICA; HETEROGENEOUS CATALYSIS; THERMOLYTIC CONVERSION;
OLEFIN EPOXIDATION; LOW-TEMPERATURE
AB Two novel tris(tert-butoxy)siloxy complexes of Pt(II) and Pt(IV) were prepared in high yields, (cod)Pt[OSi(O'Bu)(3)](2) (1; 87%; cod = 1,5-cyclooctadiene) and Me3Pt(tmeda)[OSi(O'Bu)(3)] (2; 81%; tmeda = N,N,N',N'-tetramethylethylenediamine). The structures of these compounds were determined by multinuclear NMR spectroscopy and by single-crystal X-ray analysis. The thermolytic chemistry of I and 2 in the solid state was studied by thermogravimetric analysis. The thermal decomposition of these complexes resulted in the formation of Pt metal, with the elimination of HOSi(O'Bu)(3), Precursors I and 2 react with the surface Si-OH groups of mesoporous SBA15 silica to generate surface-supported Pt centers. The coordination environments of the Supported Pt centers in these new materials, termed Pt(II)SBA15 and Pt(IV)SBA15, were investigated using Fourier-transform infrared spectroscopy, X-ray absorption near-edge spectroscopy, and extended X-ray absorption fine structure analysis. These materials were also characterized using N, porosimetry, powder X-ray diffraction and transmission electron microscopy. Comparisons with the molecular precursors 1 and 2 revealed many similarities, and the results are indicative of isolated Pt(II) and Pt(IV) centers. In addition, isolated Pt centers proved to be robust in inert atmosphere to 150-200 degrees C, which is similar to the decomposition temperatures of 1 and 2.
C1 [Ruddy, Daniel A.; Jarupatrakorn, Jonggol; McMurdo, Meredith J.; McBee, Jennifer L.; Tupper, Karl A.; Tilley, T. Don] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Ruddy, Daniel A.; Jarupatrakorn, Jonggol; McMurdo, Meredith J.; McBee, Jennifer L.; Tilley, T. Don] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
[Rioux, Robert M.] Penn State Univ, Dept Chem Engn, University Pk, PA 16802 USA.
BP Res Ctr, Naperville, IL 60565 USA.
[Miller, Jeffrey T.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Tilley, TD (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM tdtilley@berkeley.edu
RI ID, MRCAT/G-7586-2011
FU U.S. Department of Energy [DE-AC03-76SF00098]
FX The authors gratefully acknowledge the Support of the Director, Office
of Energy Research, Office of Basic Energy Sciences, Chemical Sciences
Division, of the U.S. Department of Energy under Contract
DE-AC03-76SF00098. We thank A. M. Stacy and A. P. Alivisatos at the
University of California, Berkeley, for use of instrumentation (PXRD,
SAXS, and TEM). Use of the Advanced Photon Source was supported by the
U.S. Department of Energy, Office of Science, Office of Basic Energy
Sciences and the MRCAT member institutions.
NR 82
TC 22
Z9 22
U1 0
U2 22
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 OCT 28
PY 2008
VL 20
IS 20
BP 6517
EP 6527
DI 10.1021/cm801598k
PG 11
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 363FY
UT WOS:000260254400036
ER
PT J
AU Bielicki, JK
Zhang, HY
Azhar, R
Johansson, J
Azhar, S
AF Bielicki, John K.
Zhang, Haiyan
Azhar, Rakia
Johansson, Jan
Azhar, Selman
TI Reduction of Established Atherosclerosis in Hypercholesterolemic Mouse
Models by ATI-5261: a Novel a-helix Peptide that Stimulates ABCA1
Cholesterol Efflux with High Efficiency
SO CIRCULATION
LA English
DT Meeting Abstract
CT 81st Annual Scientific Session of the American-Heart-Association
CY NOV 08-12, 2008
CL New Orleans, LA
SP Amer Heart Assoc
C1 [Bielicki, John K.] Lawrence Berkeley Natl Lab, Berkeley, CA USA.
[Zhang, Haiyan; Azhar, Rakia; Azhar, Selman] Stanford Univ, GRECC, VA Palo Alto Hlth Care Syst, Palo Alto, CA 94304 USA.
[Johansson, Jan] Artery Therapeut, Danville, CA USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0009-7322
J9 CIRCULATION
JI Circulation
PD OCT 28
PY 2008
VL 118
IS 18
BP S558
EP S558
PG 1
WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease
SC Cardiovascular System & Cardiology
GA 389ON
UT WOS:000262104501467
ER
PT J
AU Kim, HW
Yang, J
Finney, L
Vogt, S
McKinney, RD
Wilgus, TA
DiPietro, LA
Ushio-Fukai, M
Fukai, T
AF Kim, Ha Won
Yang, Jay
Finney, Lydia
Vogt, Stefan
McKinney, Ronald D.
Wilgus, Traci A.
DiPietro, Luisa A.
Ushio-Fukai, Masuko
Fukai, Tohru
TI Segregation of Copper-dependent Transcription Factor and Copper
Chaperone Function of Antioxidant-1 in Wound Healing
SO CIRCULATION
LA English
DT Meeting Abstract
CT 81st Annual Scientific Session of the American-Heart-Association
CY NOV 08-12, 2008
CL New Orleans, LA
SP Amer Heart Assoc
C1 [Kim, Ha Won; McKinney, Ronald D.; Wilgus, Traci A.; DiPietro, Luisa A.; Ushio-Fukai, Masuko; Fukai, Tohru] Univ Illinois, Chicago, IL USA.
[Yang, Jay] Columbia Univ, New York, NY USA.
[Finney, Lydia; Vogt, Stefan] Argonne Natl Lab, Chicago, IL USA.
NR 0
TC 0
Z9 0
U1 0
U2 3
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0009-7322
J9 CIRCULATION
JI Circulation
PD OCT 28
PY 2008
VL 118
IS 18
BP S332
EP S332
PG 1
WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease
SC Cardiovascular System & Cardiology
GA 389ON
UT WOS:000262104500286
ER
PT J
AU Blackburn, JL
Svedruzic, D
McDonald, TJ
Kim, YH
King, PW
Heben, MJ
AF Blackburn, Jeffrey L.
Svedruzic, Drazenka
McDonald, Timothy J.
Kim, Yong-Hyun
King, Paul W.
Heben, Michael J.
TI Raman spectroscopy of charge transfer interactions between single wall
carbon nanotubes and [FeFe] hydrogenase
SO DALTON TRANSACTIONS
LA English
DT Article
ID DESULFOVIBRIO-DESULFURICANS; ELECTRONIC-STRUCTURE; DISPERSIONS;
PROTONATION; RESONANCE; OXIDATION
AB We report a Raman spectroscopy study of charge transfer interactions in complexes formed by single-walled carbon nanotubes (SWNTs) and [FeFe] hydrogenase I (CaHydl) from clostridium acetobutylicum. The choice of Raman excitation wavelength and sample preparation conditions allows differences to be observed for complexes involving metallic (m) and semiconducting (s) species. Adsorbed CaHydl can reversibly inject electronic charge into the LUMOs of s-SWNTs, while charge can be injected and removed from m-SWNTs at lower potentials just above the Fermi energy. Time-dependent enzymatic assays demonstrated that the reduced and oxidized forms of CaHydl are deactivated by oxygen, but at rates that varied by an order of magnitude. The time evolution of the oxidative decay of the CaHydl activity reveals different time constants when complexed with m-SWNTs and s-SWNTs. The correlation of enzymatic assays with time-dependent Raman spectroscopy provides a novel method by which the charge transfer interactions may be investigated in the various SwNT. CaHydl complexes. Surprisingly, an oxidized form of CaHydl is apparently more resistant to oxygen deactivation when complexed to m-SWNTs rather than s-SWNTs.
C1 [Blackburn, Jeffrey L.; Svedruzic, Drazenka; McDonald, Timothy J.; Kim, Yong-Hyun; King, Paul W.; Heben, Michael J.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Blackburn, JL (reprint author), Natl Renewable Energy Lab, 16253 Denver W Pkwy, Golden, CO 80401 USA.
RI Kim, Yong-Hyun/C-2045-2011; Blackburn, Jeffrey/D-7344-2012; King,
Paul/D-9979-2011
OI Kim, Yong-Hyun/0000-0003-4255-2068; King, Paul/0000-0001-5039-654X
FU U.S. Department of Energy; Office of Science; Office of Basic Energy
Scicnces; Division of Chemical Sciences, Geoscienccs, and Biosciences
FX This work was supported by the U.S. Department of Energy, Office of
Science. Office of Basic Energy Scicnces. Division of Chemical Sciences,
Geoscienccs, and Biosciences.
NR 33
TC 8
Z9 8
U1 0
U2 12
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1477-9226
J9 DALTON T
JI Dalton Trans.
PD OCT 28
PY 2008
IS 40
BP 5454
EP 5461
DI 10.1039/b806379f
PG 8
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 365SS
UT WOS:000260428700009
PM 19082027
ER
PT J
AU Hansson, A
Istrate, G
AF Hansson, Anders
Istrate, Gabriel
TI Counting preimages of TCP reordering patterns
SO DISCRETE APPLIED MATHEMATICS
LA English
DT Article; Proceedings Paper
CT Cologne/Twente Workshop on Graphs and Combinatorial Optimization
CY MAY 18-20, 2005
CL Univ Cologne, Cologne, GERMANY
SP Univ Duisburt Essen, Polytechn Univ Malin, Univ Twente
HO Univ Cologne
DE TCP; Packet reordering; Doubly convex bipartite graphs; Matchings
AB Packet reordering is an important property of network traffic that should be captured by analytical models of the Transmission Control Protocol (TCP). We study a combinatorial problem motivated by RESTORED [G. Istrate, A. Hansson, S. Thulasidasan, M. Marathe, C. Barrett, Semantic compression of TCP traces, in: F. Boavida (Ed.), Proceedings of the Fifth IFIP NETWORKING Conference, in: Lecture Notes in Computer Science, vol. 3976, Springer-Verlag, 2006, pp. 123-135], a TCP modeling methodology that incorporates information about packet dynamics. A significant component of this model is a many-to-one mapping B that transforms sequences of packet IDS into buffer sequences in a manner that is compatible with TCP semantics. We obtain the following results:
We give an easy necessary and sufficient condition for an input sequence W to be valid (i.e. A is an element of B-1 (W) for some permutation A or {1, 2, . . . , n}), and a linear time algorithm that, given a valid buffer sequence W of length n, constructs a permutation A in the preimage of W.
We show that the problem of counting the number of permutations in B-1 (W) has a polynomial time algorithm.
We also show how to extend these results to sequences of IDS that contain repeated packets. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Istrate, Gabriel] eAustria Res Inst, RO-300223 Timisoara, Romania.
[Hansson, Anders] Los Alamos Natl Lab, Informat Sci CCS 3, Los Alamos, NM 87545 USA.
RP Istrate, G (reprint author), eAustria Res Inst, Bd V Parvan 4,Cam 045B, RO-300223 Timisoara, Romania.
EM hansson@lanl.gov; gabrielistrate@acm.org
NR 12
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0166-218X
EI 1872-6771
J9 DISCRETE APPL MATH
JI Discret Appl. Math.
PD OCT 28
PY 2008
VL 156
IS 17
SI SI
BP 3187
EP 3193
DI 10.1016/j.dam.2008.05.011
PG 7
WC Mathematics, Applied
SC Mathematics
GA 381WM
UT WOS:000261566600005
ER
PT J
AU Delle Monache, L
Lundquist, JK
Kosovic, B
Johannesson, G
Dyer, KM
Aines, RD
Chow, FK
Belles, RD
Hanley, WG
Larsen, SC
Loosmore, GA
Nitao, JJ
Sugiyama, GA
Vogt, PJ
AF Delle Monache, Luca
Lundquist, Julie K.
Kosovic, Branko
Johannesson, Gardar
Dyer, Kathleen M.
Aines, Roger D.
Chow, Fotini K.
Belles, Rich D.
Hanley, William G.
Larsen, Shawn C.
Loosmore, Gwen A.
Nitao, John J.
Sugiyama, Gayle A.
Vogt, Philip J.
TI Bayesian Inference and Markov Chain Monte Carlo Sampling to Reconstruct
a Contaminant Source on a Continental Scale
SO JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY
LA English
DT Article
ID GENETIC ALGORITHM; MAXIMUM-ENTROPY; PRINCIPLE; MODEL
AB A methodology combining Bayesian inference with Markov chain Monte Carlo (MCMC) sampling is applied to a real accidental radioactive release that occurred on a continental scale at the end of May 1998 near Algeciras, Spain. The source parameters (i.e., source location and strength) are reconstructed from a limited set of measurements of the release. Annealing and adaptive procedures are implemented to ensure a robust and effective parameter-space exploration. The simulation setup is similar to an emergency response scenario, with the simplifying assumptions that the source geometry and release time are known. The Bayesian stochastic algorithm provides likely source locations within 100 km from the true source, after exploring a domain covering an area of approximately 1800 km x 3600 km. The source strength is reconstructed with a distribution of values of the same order of magnitude as the upper end of the range reported by the Spanish Nuclear Security Agency. By running the Bayesian MCMC algorithm on a large parallel cluster the inversion results could be obtained in few hours as required for emergency response to continental-scale releases. With additional testing and refinement of the methodology ( e. g., tests that also include the source geometry and release time among the unknown source parameters), as well as with the continuous and rapid growth of computational power, the approach can potentially be used for real-world emergency response in the near future.
C1 [Delle Monache, Luca; Lundquist, Julie K.; Kosovic, Branko; Johannesson, Gardar; Dyer, Kathleen M.; Aines, Roger D.; Belles, Rich D.; Hanley, William G.; Larsen, Shawn C.; Loosmore, Gwen A.; Nitao, John J.; Sugiyama, Gayle A.; Vogt, Philip J.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Chow, Fotini K.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
RP Delle Monache, L (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave,L-103, Livermore, CA 94550 USA.
EM ldm@llnl.gov
RI Aines, Roger/A-2013-2013;
OI LUNDQUIST, JULIE/0000-0001-5490-2702
FU U. S. Department of Energy by University of California, Lawrence
Livermore National Laboratory [W-7405-Eng-48]
FX 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.
NR 31
TC 26
Z9 26
U1 3
U2 8
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 1558-8424
EI 1558-8432
J9 J APPL METEOROL CLIM
JI J. Appl. Meteorol. Climatol.
PD OCT 28
PY 2008
VL 47
IS 10
BP 2600
EP 2613
DI 10.1175/2008JAMC1766.1
PG 14
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 366HO
UT WOS:000260471600008
ER
PT J
AU in' t Veld, PJ
Horsch, MA
Lechman, JB
Grest, GS
AF in' t Veld, Pieter J.
Horsch, Mark A.
Lechman, Jeremy B.
Grest, Gary S.
TI Liquid-vapor coexistence for nanoparticles of various size
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID MOLECULAR-DYNAMICS SIMULATION; MONTE-CARLO SIMULATIONS; LENNARD-JONES
LIQUID; PHASE-EQUILIBRIA; MODEL; PARTICLES; NANOCOMPOSITES; DIAGRAMS;
NANORODS; SURFACE
AB We present molecular dynamics simulations of the liquid-vapor phase coexistence of pure nanoparticle systems with three different model nanoparticle interactions. Our simulations show that the form of the interaction potential between nanoparticles strongly influences their coexistence behavior. For nanoparticles interacting with an integrated Lennard-Jones potential, the critical temperature and critical density increase with increasing particle size. In contrast, nanoparticles interacting via a Lennard-Jones potential shifted to the surface of the nanoparticle do not exhibit the expected size dependence of the phase diagram. For this model, the critical temperature decreases with increasing nanoparticle size. Similar results were observed for composite nanoparticles, with the interactions truncated at a finite distance. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2996513]
C1 [in' t Veld, Pieter J.] BASF SE, Polymer Res, D-67056 Ludwigshafen, Germany.
[in' t Veld, Pieter J.; Horsch, Mark A.; Lechman, Jeremy B.; Grest, Gary S.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP in' t Veld, PJ (reprint author), BASF SE, Polymer Res, D-67056 Ludwigshafen, Germany.
EM gsgrest@sandia.gov
FU Sandia Corporation; Lockheed-Martin Company [DE-AC04-94AL85000]
FX 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. Sandia National Laboratories is a multi-program
laboratory operated by Sandia Corporation, a Lockheed-Martin Company,
for the U. S. Department of Energy under Contract No. DE-AC04-94AL85000.
NR 42
TC 8
Z9 8
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 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD OCT 28
PY 2008
VL 129
IS 16
AR 164504
DI 10.1063/1.2996513
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 367SI
UT WOS:000260572300044
PM 19045281
ER
PT J
AU Jungen, C
Pratt, ST
AF Jungen, Ch.
Pratt, S. T.
TI Renner-Teller interactions in the vibrational autoionization of
polyatomic molecules
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID QUANTUM-DEFECT THEORY; TRIPLE-RESONANCE SPECTROSCOPY; HIGHER
EXCITED-STATES; ORBITAL ANGULAR-MOMENTUM; RYDBERG STATES; DISSOCIATIVE
RECOMBINATION; TRIATOMIC-MOLECULES; LINEAR-MOLECULES; NO2; IONIZATION
AB Vibrational autoionization induced by the Renner-Teller interaction in linear polyatomic molecules is considered in the context of the three-state electrostatic model developed by Gauyacq and Jungen [Mol. Phys. 41, 383 (1980)]. For small interactions, simple formulas are derived for the quantum defect matrix elements and the autoionization rates in terms of the more common Renner-Teller parameters derived from spectroscopic analyses of low-lying Rydberg states. These formulas should provide guidance for empirical fitting of quantum defect parameters to spectra of high Rydberg states. Consideration of typical values of the Renner-Teller parameters also allows the estimation of vibrational autoionization rates induced by these interactions. These estimates support the validity of the Delta v = -1 propensity rule for vibrational autoionization. Constraints on the vibrational autoionization rates for the symmetric stretching vibration are also discussed. In the following paper, electron capture by polyatomic molecular ions into vibrationally autoionizing Rydberg states is considered from the same perspective, and a simple formula is derived to allow the estimation of the effect of this process on dissociative recombination cross sections. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2999553]
C1 [Jungen, Ch.] Univ Paris 11, CNRS, Aime Cotton Lab, F-91405 Orsay, France.
[Pratt, S. T.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Jungen, C (reprint author), Univ Paris 11, CNRS, Aime Cotton Lab, F-91405 Orsay, France.
EM stpratt@anl.gov
FU U. S. Department of Energy, Office of Science, Office of Basic Energy
Sciences; Division of Chemical Sciences, Geosciences, and Biosciences
[DE-AC02-06CH11357]; E. Miescher Foundation (Basel, Switzerland)
FX The work at Argonne was supported by the U. S. Department of Energy,
Office of Science, Office of Basic Energy Sciences, Division of Chemical
Sciences, Geosciences, and Biosciences under Contract No.
DE-AC02-06CH11357. S. T. P. also thanks the Universite Paris Sud for
support for a series of visits during which this work was developed. C.
J. has benefited from financial support by the E. Miescher Foundation
(Basel, Switzerland).
NR 48
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 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD OCT 28
PY 2008
VL 129
IS 16
AR 164310
DI 10.1063/1.2999553
PG 11
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 367SI
UT WOS:000260572300032
PM 19045269
ER
PT J
AU Jungen, C
Pratt, ST
AF Jungen, Ch.
Pratt, S. T.
TI Renner-Teller interactions in the dissociative recombination of HCO(+)
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID DOUBLE-RESONANCE SPECTROSCOPY; EXCITED VIBRATIONAL-STATES; ORBITAL
ANGULAR-MOMENTUM; HIGH RYDBERG STATES; TRIATOMIC-MOLECULES; IONIZATION;
SPECTRUM; MODE; LINE; DCO+
AB The formalism developed in the preceding paper for vibrational autoionization via Renner-Teller active vibrations is adapted to treat dissociative recombination and applied to the reaction of HCO(+) + e(-). Existing spectroscopic data on the rovibrational structure of the HCO(+) (2)Sigma(+) ion and the HCO 3p pi(2)Pi Rydberg state are fitted by using the semirigid bender model to extract the parameters required to calculate the autoionization and electron capture widths. The results of this simple model are in good agreement with more detailed first principles calculations of the dissociative recombination cross section and confirm the earlier conclusion that coupling due to the Renner Teller interaction is largely responsible for the observed dissociative recombination cross section at electron energies below similar to 0.1 eV. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2999557]
C1 [Jungen, Ch.] Univ Paris 11, CNRS, Aime Cotton Lab, F-91405 Orsay, France.
[Pratt, S. T.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Jungen, C (reprint author), Univ Paris 11, CNRS, Aime Cotton Lab, F-91405 Orsay, France.
EM stpratt@anl.gov
NR 41
TC 17
Z9 17
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 OCT 28
PY 2008
VL 129
IS 16
AR 164311
DI 10.1063/1.2999557
PG 9
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 367SI
UT WOS:000260572300033
PM 19045270
ER
PT J
AU Durach, M
Rusina, A
Klimov, VI
Stockman, MI
AF Durach, M.
Rusina, A.
Klimov, V. I.
Stockman, M. I.
TI Nanoplasmonic renormalization and enhancement of Coulomb interactions
SO NEW JOURNAL OF PHYSICS
LA English
DT Article
ID ENERGY-TRANSFER; RAMAN-SCATTERING; SILVER ELECTRODE; SEMICONDUCTOR
NANOCRYSTALS; FLUORESCENCE; SPECTROSCOPY; PYRIDINE; SPECTRA
AB In this paper, we propose a general and powerful theory of the plasmonic enhancement of the many-body phenomena resulting in a closed expression for the surface plasmon-dressed Coulomb interaction. We illustrate this theory by computing the dressed interaction explicitly for an important example of metal-dielectric nanoshells which exhibits a rich resonant behavior in magnitude and phase. This interaction is used to describe the nanoplasmonic-enhanced Forster resonant energy transfer (FRET) between nanocrystal quantum dots near a nanoshell.
C1 [Durach, M.; Rusina, A.; Stockman, M. I.] Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30303 USA.
[Klimov, V. I.] Los Alamos Natl Lab, Div Chem, C PCS, Los Alamos, NM USA.
RP Stockman, MI (reprint author), Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30303 USA.
EM mstockman@gsu.edu
OI Klimov, Victor/0000-0003-1158-3179
FU NSF [0507147]; US-Israel BSF; DOE Center; Los Alamos and Sandia National
Laboratories
FX This work was supported by grants from the Chemical Sciences,
Biosciences and Geosciences Division of the Office of Basic Energy
Sciences, Office of Science, US Department of Energy, a grant
CHE-0507147 from NSF, a grant from the US-Israel BSF, and by the DOE
Center for Integrated Nanotechnologies jointly operated by the the Los
Alamos and Sandia National Laboratories. MIS gratefully acknowledges
useful discussions with D Bergman and A Nitzan.
NR 31
TC 57
Z9 57
U1 1
U2 19
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1367-2630
J9 NEW J PHYS
JI New J. Phys.
PD OCT 28
PY 2008
VL 10
AR 105011
DI 10.1088/1367-2630/10/10/105011
PG 14
WC Physics, Multidisciplinary
SC Physics
GA 370JW
UT WOS:000260759500010
ER
PT J
AU Oulton, RF
Bartal, G
Pile, DFP
Zhang, X
AF Oulton, R. F.
Bartal, G.
Pile, D. F. P.
Zhang, X.
TI Confinement and propagation characteristics of subwavelength plasmonic
modes
SO NEW JOURNAL OF PHYSICS
LA English
DT Article
ID WAVE-GUIDES; SURFACE; POLARITON
AB We have studied subwavelength confinement of the surface plasmon polariton modes of various plasmonic waveguides and examined their relative merits using a graphical parametric representation of their confinement and propagation characteristics. While the same plasmonic phenomenon governs mode confinement in all these waveguides, the various architectures can exhibit distinctive behavior in terms of effective mode area and propagation distance. We found that the waveguides based on metal and one dielectric material show a similar trade-off between energy confinement and propagation distance. However, a hybrid plasmon waveguide, incorporating metal, low index and high index dielectric materials, exhibits longer propagation distances for the same degree of confinement. We also point out that plasmonic waveguides with sharp features can provide an extremely strong local field enhancement, which is not necessarily accompanied by strong confinement of the total electromagnetic energy. In these waveguides, a mode may couple strongly to nearby atoms, but suffer relatively low propagation losses due to weak confinement.
C1 [Oulton, R. F.; Bartal, G.; Zhang, X.] Univ Calif Berkeley, NSF Nanoscale Sci & Engn Ctr, Berkeley, CA 94720 USA.
[Pile, D. F. P.] Queensland Univ Technol, Appl Opt Program, Sch Phys & Chem Sci, Brisbane, Qld 4001, Australia.
[Zhang, X.] 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, 3112 Etcheverry Hall, Berkeley, CA 94720 USA.
EM xiang@berkeley.edu
RI Zhang, Xiang/F-6905-2011;
OI Pile, David/0000-0001-9961-1319
FU AFOSR MURI [FA9550-04-1-0434]; NSF Nanoscale Science and Engineering
Centre [DMI-0327077]
FX This work was supported by AFOSR MURI (FA9550-04-1-0434) and NSF
Nanoscale Science and Engineering Centre (DMI-0327077).
NR 26
TC 159
Z9 162
U1 7
U2 70
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1367-2630
J9 NEW J PHYS
JI New J. Phys.
PD OCT 28
PY 2008
VL 10
AR 105018
DI 10.1088/1367-2630/10/10/105018
PG 14
WC Physics, Multidisciplinary
SC Physics
GA 370JW
UT WOS:000260759500017
ER
PT J
AU Shegai, T
Li, ZP
Dadosh, T
Zhang, ZY
Xu, HX
Haran, G
AF Shegai, Timur
Li, Zhipeng
Dadosh, Tali
Zhang, Zhenyu
Xu, Hongxing
Haran, Gilad
TI Managing light polarization via plasmon-molecule interactions within an
asymmetric metal nanoparticle trimer
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE generalized Mie theory; single-molecule Raman scattering; plasmonics
ID SURFACE-ENHANCED RAMAN; ELECTROMAGNETIC ENERGY-FLOW; ARBITRARY SPHERES;
SCATTERING SERS; HOLE ARRAYS; SPECTROSCOPY; SILVER; SENSITIVITY;
POLARITONS; FIELD
AB The interaction of light with metal nanoparticles leads to novel phenomena mediated by surface plasmon excitations. In this article we use single molecules to characterize the interaction of surface plasmons with light, and show that such interaction can strongly modulate the polarization of the emitted light. The simplest nanostructures that enable such polarization modulation are asymmetric silver nanocrystal trimers, where individual Raman scattering molecules are located in the gap between two of the nanoparticles. The third particle breaks the dipolar symmetry of the two-particle junction, generating a wavelength-dependent polarization pattern. Indeed, the scattered light becomes elliptically polarized and its intensity pattern is rotated in the presence of the third particle. We use a combination of spectroscopic observations on single molecules, scanning electron microscope imaging, and generalized Mie theory calculations to provide a full picture of the effect of particles on the polarization of the emitted light. Furthermore, our theoretical analysis allows us to show that the observed phenomenon is very sensitive to the size of the trimer particles and their relative position, suggesting future means for precise control of light polarization on the nanoscale.
C1 [Li, Zhipeng; Xu, Hongxing] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China.
[Shegai, Timur; Haran, Gilad] Weizmann Inst Sci, Dept Chem Phys, IL-76100 Rehovot, Israel.
[Dadosh, Tali] Weizmann Inst Sci, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel.
[Zhang, Zhenyu] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Zhang, Zhenyu] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Xu, Hongxing] Lund Univ, Div Solid State Phys, S-22100 Lund, Sweden.
RP Xu, HX (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, POB 603, Beijing 100080, Peoples R China.
EM hongxingxu@aphy.iphy.ac.cn; gilad.haran@weizmann.ac.il
RI li, zhipeng/D-3313-2009; Shegai, Timur/B-1207-2011; IoP, Nano
Lab/B-9663-2013; HARAN, GILAD/K-1489-2012; zou, Ci/E-8559-2017
FU Natural Science Foundation of China [10625418]; Ministry of Science and
Technology [2006DFB02020, 2007CB936800]; Chinese Academy of Science;
Division of Materials Sciences and Engineering; Office of Basic Energy
Sciences; Department of Energy [DEFG0205ER46209]; National Science
Foundation [DMR-0606485]; Israel Science Foundation; Weizmann Institute
of Science
FX This work was supported by Natural Science Foundation of China Contract
10625418 (to H.X.), Ministry of Science and Technology Contract
2006DFB02020 and 2007CB936800 (to H.X.), the "Bairen" projects of the
Chinese Academy of Science (H.X.); in part, by Division of Materials
Sciences and Engineering, Office of Basic Energy Sciences, Department of
Energy Grant DEFG0205ER46209 (to Z.Z.) and, in part, by National Science
Foundation Grant DMR-0606485) (to Z.Z.); in part, by the historic
generosity of the Harold Perlman Family (G.H.) and by the Israel Science
Foundation. The electron microscopy studies were conducted at the Irving
and Cherna Moskowitz Center for Nano and Bio-Nano Imaging at the
Weizmann Institute of Science.
NR 31
TC 150
Z9 151
U1 6
U2 68
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 OCT 28
PY 2008
VL 105
IS 43
BP 16448
EP 16453
DI 10.1073/pnas.0808365105
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 372PM
UT WOS:000260913500011
PM 18927232
ER
PT J
AU Canovas, E
Marti, A
Luque, A
Walukiewicz, W
AF Canovas, E.
Marti, A.
Luque, A.
Walukiewicz, W.
TI Optimum nitride concentration in multiband III-N-V alloys for high
efficiency ideal solar cells
SO APPLIED PHYSICS LETTERS
LA English
DT Article
AB III-N-x-V1-x highly mismatched alloys (HMAs) have been proposed as promising material candidates for the development of high efficiency solar cells. According to the band anticrossing model, these alloys present a multiband character with an intermediate band within the otherwise fundamental bandgap that gives them the ability of improving the efficiency by means of below-bandgap photon absorption. The efficiency of GaNxAs1-x, GaNxP1-x, and their quaternaries InyGa1-yNxAs1-x and GaNxP1-x-yAsy is estimated theoretically versus nitrogen content in this letter. Low nitrogen content in the range of 1%-3.5% in the HMAs analyzed leads to theoretical efficiencies above 60%. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3013570]
C1 [Canovas, E.; Marti, A.; Luque, A.] Univ Politecn Madrid, Inst Energia Solar, E-28040 Madrid, Spain.
[Walukiewicz, W.] Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Canovas, E (reprint author), Univ Politecn Madrid, Inst Energia Solar, E-28040 Madrid, Spain.
EM canovas@ies-def.upm.es
RI Marti, Antonio/L-2791-2014; Canovas, Enrique/F-9104-2016
OI Marti, Antonio/0000-0002-8841-7091;
FU European Commission [211640]; Comunidad de Madrid [S-0505/ENE/000310];
Plan Nacional de Formacion de Personal Investigador [CSD2006-00004]
FX This work has been supported by the European Commission within the
project IBPOWER (Contract No. 211640)) and the projects NUMANCIA
(Contract No. S-0505/ENE/000310) funded by the Comunidad de Madrid and
GENESIS-FV (Contract No. CSD2006-00004) funded by the Spanish National
Programme. E. C. acknowledges the "Plan Nacional de Formacion de
Personal Investigador" research grant.
NR 18
TC 11
Z9 11
U1 0
U2 13
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 OCT 27
PY 2008
VL 93
IS 17
AR 174109
DI 10.1063/1.3013570
PG 3
WC Physics, Applied
SC Physics
GA 367SD
UT WOS:000260571800109
ER
PT J
AU Creighton, JR
Coltrin, ME
Figiel, JJ
AF Creighton, J. Randall
Coltrin, Michael E.
Figiel, Jeffrey J.
TI Observations of gas-phase nanoparticles during InGaN metal-organic
chemical vapor deposition
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID INDIUM INCORPORATION; OPTICAL-PROPERTIES; MOVPE; GROWTH; FILMS;
CHEMISTRY
AB Using in situ laser light scattering, we have directly observed the formation of gas-phase nanoparticles during InN and InGaN metal-organic chemical vapor deposition. The angular dependence of the light scattering intensity suggests that the nanoparticles are metallic In or InGa alloys. From the angle-resolved scattering profile, we determined that the particle diameters were in the range 20-50 nm, and particle densities were mostly in the 10(8)-10(9) cm(-3) range. Results indicate that for growth temperatures near 800 C nearly 100% of the indium near the surface is converted into gas-phase nanoparticles and is no longer available for InGaN growth. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3009291]
C1 [Creighton, J. Randall; Coltrin, Michael E.; Figiel, Jeffrey J.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Creighton, JR (reprint author), Sandia Natl Labs, POB 5800,MS 1086, Albuquerque, NM 87185 USA.
EM jrcreig@sandia.gov
FU Sandia National Laboratories, for the United States Department of Energy
[DE-AC04-94AL85000]; U. S. Department of Energy's Office of Energy
Efficiency and Renewable Energy (ERE)Solid-State Lighting Core
Technology Program; National Energy Technology Laboratory [M6743230]
FX This research was performed at Sandia National Laboratories, for the
United States Department of Energy under Contract No. DE-AC04-94AL85000.
Most of this work was funded by the U. S. Department of Energy's Office
of Energy Efficiency and Renewable Energy (ERE)Solid-State Lighting Core
Technology Program, administered by the National Energy Technology
Laboratory, Project No. M6743230, Manager: Joel Chaddock. We wish to
acknowledge Bill Breiland for valuable assistance in both the
experimental and theoretical work reported here.
NR 24
TC 13
Z9 13
U1 6
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 OCT 27
PY 2008
VL 93
IS 17
AR 171906
DI 10.1063/1.3009291
PG 3
WC Physics, Applied
SC Physics
GA 367SD
UT WOS:000260571800021
ER
PT J
AU Hindmarch, AT
Dempsey, KJ
Morgan, JP
Hickey, BJ
Arena, DA
Marrows, CH
AF Hindmarch, A. T.
Dempsey, K. J.
Morgan, J. P.
Hickey, B. J.
Arena, D. A.
Marrows, C. H.
TI Room temperature magnetic stabilization of buried cobalt nanoclusters
within a ferromagnetic matrix studied by soft x-ray magnetic circular
dichroism
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID NANOPARTICLES; PARTICLES
AB Single dusting layers of size-selected Co nanoclusters (NCs) of sizes ranging from 1.5-5.5 nm have been deposited by a gas-phase aggregation method in ultrahigh vacuum, and embedded within a NiFe matrix. Magnetic hysteresis loops have been obtained using soft x-ray magnetic circular dichroism, which shows that these Co NCs embedded in NiFe exhibit room temperature ferromagnetism with identical coercivity to the surrounding NiFe film. The strong local exchange field at the interface between NiFe and Co NCs, combined with the magnetic anisotropy of the NiFe film, allows stabilization of NC ferromagnetism which persists to room temperature. (c) 2008 American Institute of Physics. [DOI: 10.1063/1.3012368]
C1 [Hindmarch, A. T.; Dempsey, K. J.; Morgan, J. P.; Hickey, B. J.; Marrows, C. H.] Univ Leeds, Sch Phys & Astron, EC Stoner Lab, Leeds LS2 9JT, W Yorkshire, England.
[Arena, D. A.] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
RP Hindmarch, AT (reprint author), Univ Leeds, Sch Phys & Astron, EC Stoner Lab, Leeds LS2 9JT, W Yorkshire, England.
EM a.t.hindmarch@leeds.ac.uk
RI Marrows, Christopher/D-7980-2011; Hindmarch, Aidan/B-7970-2012; Morgan,
Jason/K-7757-2012; Hickey, B J/B-3333-2016;
OI Hickey, B J/0000-0001-8289-5618; Morgan, Jason/0000-0003-2785-8165;
Marrows, Christopher/0000-0003-4812-6393
FU EPSRC; Brookhaven National Laboratory
FX The authors acknowledge financial support from EPSRC and are grateful to
Brookhaven National Laboratory for the provision of NSLS beamtime.
NR 16
TC 5
Z9 5
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD OCT 27
PY 2008
VL 93
IS 17
AR 172511
DI 10.1063/1.3012368
PG 3
WC Physics, Applied
SC Physics
GA 367SD
UT WOS:000260571800061
ER
PT J
AU Pookpanratana, S
France, R
Bar, M
Weinhardt, L
Fuchs, O
Blum, M
Yang, W
Denlinger, JD
Moustakas, TD
Heske, C
AF Pookpanratana, S.
France, R.
Baer, M.
Weinhardt, L.
Fuchs, O.
Blum, M.
Yang, W.
Denlinger, J. D.
Moustakas, T. D.
Heske, C.
TI Intermixing and chemical structure at the interface between n-GaN and
V-based contacts
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID OHMIC CONTACTS; ALGAN/GAN HETEROSTRUCTURES; GALLIUM NITRIDE; XPS
AB The interface between n-type GaN and V-based contacts was characterized by soft x-ray spectroscopy. We have investigated the chemical interface structure before and after a rapid thermal annealing (RTA) step, which is crucial for the formation of an Ohmic contact. X-ray photoelectron and x-ray excited Auger electron spectra suggest that RTA induces an accumulation of metallic Ga at the surface. Using x-ray emission spectroscopy, we find that the probed nitrogen atoms are in a VN-like environment, indicating that vanadium interacts with nitrogen atoms from the GaN to form VN. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2992199]
C1 [Pookpanratana, S.; Baer, M.; Weinhardt, L.; Heske, C.] Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA.
[France, R.; Moustakas, T. D.] Boston Univ, Dept Elect & Comp Engn, Boston, MA 02215 USA.
[Fuchs, O.; Blum, M.] Univ Wurzburg, D-97074 Wurzburg, Germany.
[Yang, W.; Denlinger, J. D.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Pookpanratana, S (reprint author), Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA.
EM pookpanr@unlv.nevada.edu; tdm@bu.edu; heske@unlv.nevada.edu
RI Weinhardt, Lothar/G-1689-2013; Yang, Wanli/D-7183-2011; Moustakas,
Theodore/D-9249-2016
OI Yang, Wanli/0000-0003-0666-8063; Moustakas, Theodore/0000-0001-8556-884X
FU U.S. Department of Energy (DOE) [DE-FG36-05GO85032]; Nevada System of
Higher Education [NSHE 07-101, 08-03]; DOE [DE-AC02-05CH11231]; Deutsche
Forschungsgemeinschaft
FX We gratefully acknowledge support from the U.S. Department of Energy
(DOE) under Contract No. DE-FG36-05GO85032 and the Nevada System of
Higher Education under SFFA Nos. NSHE 07-101 and 08-03. The Advanced
Light Source is supported by the DOE under Contract No.
DE-AC02-05CH11231, and M. Bar gratefully acknowledges support by the
Emmy Noether Programm of the Deutsche Forschungsgemeinschaft.
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD OCT 27
PY 2008
VL 93
IS 17
AR 172106
DI 10.1063/1.2992199
PG 3
WC Physics, Applied
SC Physics
GA 367SD
UT WOS:000260571800037
ER
PT J
AU Wang, Y
Han, XF
Zhang, XG
AF Wang, Yan
Han, X. F.
Zhang, X. -G.
TI Effect of Co interlayers in Fe/MgO/Fe magnetic tunnel junctions
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID ROOM-TEMPERATURE; MAGNETORESISTANCE; LAYER
AB The effect of Co interlayers in -Fe(001)/Co/MgO/Co/Fe- magnetic tunnel junctions is studied by first-principles calculation. We confirm that the Co layers inserted at the two Fe/MgO interfaces strongly influence the interfacial resonance (IR) states and the tunneling magnetoresistance (TMR). The effect is not monotonic. Strongest IR occurs at Co layer thickness of 0.5 monolayer (ML). With 1 ML Co, the IR is dramatically reduced and TMR ratio is maximized. (c) 2008 American Institute of Physics. [DOI: 10.1063/1.3005561]
C1 [Wang, Yan; Han, X. F.] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, State Key Lab Magnetism, Beijing 100080, 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 Wang, Y (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, State Key Lab Magnetism, Beijing 100080, Peoples R China.
EM wyan@aphy.iphy.ac.cn; xfhan@aphy.iphy.ac.cn; xgz@ornl.gov
RI Wang, Yan/G-8061-2011
OI Wang, Yan/0000-0002-8648-2172
FU Ministry of Science and Technology (MOST) [2006CB932200]; National
Natural Science Foundation of China (NNSFC) [10574156]; Outstanding
Young Researcher Foundation [50528101, 50721001]
FX The project was supported by the State Key Project of Fundamental
Research of Ministry of Science and Technology (MOST) (Grant No.
2006CB932200), National Natural Science Foundation of China (NNSFC)
(Grant No. 10574156), and the Knowledge Innovation Program Project of
Chinese Academy of Sciences. X. F. H. gratefully thanks the partial
support of Outstanding Young Researcher Foundation (NSFC, Grant Nos.
50528101 and 50721001), K. C. Wong Education Foundation, Hong Kong, and
Microfabrication Center of Institute of Physics, CAS. A portion of this
research was conducted at the Center for Nanophase Materials Sciences,
which is sponsored at Oak Ridge National Laboratory by the Division of
Scientific User Facilities, U. S. Department of Energy.
NR 15
TC 16
Z9 16
U1 2
U2 14
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 OCT 27
PY 2008
VL 93
IS 17
AR 172501
DI 10.1063/1.3005561
PG 3
WC Physics, Applied
SC Physics
GA 367SD
UT WOS:000260571800051
ER
PT J
AU Withers, NJ
Sankar, K
Akins, BA
Memon, TA
Gu, TY
Gu, JJ
Smolyakov, GA
Greenberg, MR
Boyle, TJ
Osinski, M
AF Withers, Nathan J.
Sankar, Krishnaprasad
Akins, Brian A.
Memon, Tosifa A.
Gu, Tingyi
Gu, Jiangjiang
Smolyakov, Gennady A.
Greenberg, Melisa R.
Boyle, Timothy J.
Osinski, Marek
TI Rapid degradation of CdSe/ZnS colloidal quantum dots exposed to gamma
irradiation
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID NANOCRYSTALS; EXCITON; LUMINESCENCE; STATES; DARK
AB Effects of (137)Cs gamma irradiation on photoluminescent properties of CdSe/ZnS colloidal quantum dots are reported. Optical degradation is evaluated by tracking the dependence of photoluminescence intensity on irradiation dose. CdSe/ZnS quantum dots show poor radiation hardness, and severely degrade after less than 20 kR exposure to 662 keV gamma photons. (c) 2008 American Institute of Physics. [DOI: 10.1063/1.2978073]
C1 [Withers, Nathan J.; Sankar, Krishnaprasad; Akins, Brian A.; Memon, Tosifa A.; Gu, Tingyi; Gu, Jiangjiang; Smolyakov, Gennady A.; Greenberg, Melisa R.; Osinski, Marek] Univ New Mexico, Ctr High Technol Mat, Albuquerque, NM 87106 USA.
[Boyle, Timothy J.] Sandia Natl Labs, Adv Mat Lab, Albuquerque, NM 87106 USA.
RP Withers, NJ (reprint author), Univ New Mexico, Ctr High Technol Mat, 1313 Goddard SE, Albuquerque, NM 87106 USA.
EM osinski@chtm.unm.edu
RI Gu, Jiangjiang/C-9642-2012; Gu, Tingyi/K-2067-2012; Gu,
Tingyi/A-4002-2013
OI Gu, Tingyi/0000-0003-4152-0160;
FU NSF [IIS-0610201, CBET-0736241, DGE-0549500]
FX This work was supported by the NSF Grant Nos. IIS-0610201, CBET-0736241,
and DGE-0549500. The authors express their gratitude to members of the
UNM Department of Safety and Risk Services: Jim De Zetter, Marybeth
Marcinkovich, Ralph M. Becker, Marj Walters, and Tom Rolland for their
regular assistance with the use of Eberline 1000B multisource gamma
calibrator. Dr. Markku Koskello and Don Jacoby of Canberra Albuquerque,
Inc., are gratefully acknowledged for the loan of a calibrated Canberra
Radiac Meter Geiger-Muller counter, which was used to calibrate the
Eberline 137Cs source used in irradiation tests.
NR 19
TC 11
Z9 11
U1 0
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD OCT 27
PY 2008
VL 93
IS 17
AR 173101
DI 10.1063/1.2978073
PG 3
WC Physics, Applied
SC Physics
GA 367SD
UT WOS:000260571800073
ER
PT J
AU Zhang, ZJ
Peng, RW
Wang, Z
Gao, F
Huang, XR
Sun, WH
Wang, QJ
Wang, MU
AF Zhang, Z. J.
Peng, R. W.
Wang, Z.
Gao, F.
Huang, X. R.
Sun, W. H.
Wang, Q. J.
Wang, M. U.
TI Plasmonic antenna array at optical frequency made by nanoapertures
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID TRANSMISSION; FILMS; METAL
AB We show here that the plasmonic array based on nanoapertures in ultrathin silver film radiates at optical frequency and behaves as an optical antenna array (OAA). The far-field radiation originates from the coherent superposition of plasmonic emissions on each bank of the aperture. The radiation of OAA presents a strong directivity, which depends on the in-plane rotation of aperture array, and on the polarization and incidence angle of the excitation light as well. We suggest that these features have potential applications in photovoltaics, light-emitting devices, and optical sensors. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3010741]
C1 [Zhang, Z. J.; Peng, R. W.; Wang, Z.; Gao, F.; Sun, W. H.; Wang, Q. J.; Wang, M. U.] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China.
[Zhang, Z. J.; Peng, R. W.; Wang, Z.; Gao, F.; Sun, W. H.; Wang, Q. J.; Wang, M. U.] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China.
[Huang, X. R.] Brookhaven Natl Lab, Natl Synchrotron Light Source 2, Upton, NY 11973 USA.
RP Peng, RW (reprint author), Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China.
EM rwpeng@nju.edu.cn
FU NSFC [10625417, 50672035, 10874068]; MOST of China [2004CB619005,
2006CB921804]; ME of China; Jiangsu Province [NCET-05-0440, BK2008012]
FX The authors gratefully acknowledge the discussion with Professor Xiang
Zhang. This work was supported by grants from the NSFC (Grant Nos.
10625417, 50672035, and 10874068), the MOST of China (Grant Nos.
2004CB619005 and 2006CB921804), and partly by the ME of China and also
Jiangsu Province (Grant Nos. NCET-05-0440 and BK2008012).
NR 23
TC 20
Z9 20
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 OCT 27
PY 2008
VL 93
IS 17
AR 171110
DI 10.1063/1.3010741
PG 3
WC Physics, Applied
SC Physics
GA 367SD
UT WOS:000260571800010
ER
PT J
AU Zuev, YL
Christen, DK
Wee, SH
Goyal, A
Cook, SW
AF Zuev, Y. L.
Christen, D. K.
Wee, S. H.
Goyal, A.
Cook, S. W.
TI Near-isotropic performance of intrinsically anisotropic high-temperature
superconducting tapes due to self-assembled nanostructures
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID COATED CONDUCTORS; NANODOTS; WIRES
AB We report material and operating parameter conditions where prototype high-temperature superconducting tape conductors exhibit in-plane critical current characteristics that are essentially field orientation independent. This phenomenon is observed for specific magnetic field intensities that depend on the operating temperature and in materials having strong flux pinning by extended nanoscale structures aligned roughly along the crystalline c-axis. The effect can be described by a simple model for the field dependence of critical current density, generalized for anisotropic electronic response. This description may provide insight into means to fine tune the material properties for nearly isotropic performance characteristics at a preferred field and temperature. (c) 2008 American Institute of Physics. [DOI: 10.1063/1.3009286]
C1 [Zuev, Y. L.; Christen, D. K.; Wee, S. H.; Goyal, A.; Cook, S. W.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Wee, S. H.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
RP Zuev, YL (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM christendk@ornl.gov
FU Department of Energy Office of Electricity Delivery and Energy
Reliability; Superconductivity for Electric Systems; Office of Basic
Energy Sciences-Division of Materials Sciences and Engineering
FX The authors are grateful to J.R. Thompson and D. F. Lee for useful
discussions. Y.L.Z. would like to thank Oak Ridge Associated
Universities for a postdoctoral fellowship. This work was sponsored by
the Department of Energy Office of Electricity Delivery and Energy
Reliability (OE)-Superconductivity for Electric Systems, and the Office
of Basic Energy Sciences-Division of Materials Sciences and Engineering.
This research was performed at the Oak Ridge National Laboratory,
managed by UT-Battelle, LLC for the USDOE.
NR 15
TC 18
Z9 18
U1 2
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 OCT 27
PY 2008
VL 93
IS 17
AR 172512
DI 10.1063/1.3009286
PG 3
WC Physics, Applied
SC Physics
GA 367SD
UT WOS:000260571800062
ER
PT J
AU Binkowski, TA
Joachimiak, A
AF Binkowski, T. Andrew
Joachimiak, Andrzej
TI Protein Functional Surfaces: Global Shape Matching and Local Spatial
Alignments of Ligand Binding Sites
SO BMC STRUCTURAL BIOLOGY
LA English
DT Article
ID ENZYME ACTIVE-SITES; TYROSINE KINASE; STI-571 INHIBITION;
CRYSTAL-STRUCTURE; COMPUTED ATLAS; HIV-1 PROTEASE; 3D TEMPLATES;
SIDE-CHAINS; RECOGNITION; PATTERNS
AB Background: Protein surfaces comprise only a fraction of the total residues but are the most conserved functional features of proteins. Surfaces performing identical functions are found in proteins absent of any sequence or fold similarity. While biochemical activity can be attributed to a few key residues, the broader surrounding environment plays an equally important role.
Results: We describe a methodology that attempts to optimize two components, global shape and local physicochemical texture, for evaluating the similarity between a pair of surfaces. Surface shape similarity is assessed using a three-dimensional object recognition algorithm and physicochemical texture similarity is assessed through a spatial alignment of conserved residues between the surfaces. The comparisons are used in tandem to efficiently search the Global Protein Surface Survey (GPSS), a library of annotated surfaces derived from structures in the PDB, for studying evolutionary relationships and uncovering novel similarities between proteins.
Conclusion: We provide an assessment of our method using library retrieval experiments for identifying functionally homologous surfaces binding different ligands, functionally diverse surfaces binding the same ligand, and binding surfaces of ubiquitous and conformationally flexible ligands. Results using surface similarity to predict function for proteins of unknown function are reported. Additionally, an automated analysis of the ATP binding surface landscape is presented to provide insight into the correlation between surface similarity and function for structures in the PDB and for the subset of protein kinases.
C1 [Joachimiak, Andrzej] Argonne Natl Lab, Midwest Ctr Struct Genom, Argonne, IL 60439 USA.
Argonne Natl Lab, Struct Biol Ctr, Biosci Div, Argonne, IL 60439 USA.
RP Joachimiak, A (reprint author), Argonne Natl Lab, Midwest Ctr Struct Genom, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM abinkowski@anl.gov; andrzejj@anl.gov
FU National Institutes of Health [GM62414, GM074942]; U.S. Department of
Energy, Office of Biological and Environmental Research
[DE-AC02-06CH11357]
FX We wish to thank Dr. Jie Liang for discussion of ideas and access to
CASTp database, all members of the Midwest Center for Structural
Genomics for making their data available and discussions. Molecular
graphics were created using PyMOL[33]. This work was supported by
National Institutes of Health Grants GM62414 and GM074942 and by the
U.S. Department of Energy, Office of Biological and Environmental
Research, under contract DE-AC02-06CH11357.
NR 75
TC 35
Z9 37
U1 2
U2 3
PU BIOMED CENTRAL LTD
PI LONDON
PA CURRENT SCIENCE GROUP, MIDDLESEX HOUSE, 34-42 CLEVELAND ST, LONDON W1T
4LB, ENGLAND
SN 1471-2237
J9 BMC STRUCT BIOL
JI BMC Struct. Biol.
PD OCT 27
PY 2008
VL 8
AR 45
DI 10.1186/1472-6807-8-45
PG 23
WC Biophysics
SC Biophysics
GA 406ZY
UT WOS:000263334600001
PM 18954462
ER
PT J
AU Xu, G
Piao, D
Musgrove, CH
Bunting, CF
Dehghani, H
AF Xu, Guan
Piao, Daqing
Musgrove, Cameron H.
Bunting, Charles F.
Dehghani, Hamid
TI Trans-rectal ultrasound-coupled near-infrared optical tomography of the
prostate Part I: Simulation
SO OPTICS EXPRESS
LA English
DT Article
ID PIECEWISE-CONSTANT COEFFICIENTS; RADICAL PROSTATECTOMY; TRANSRECTAL
ULTRASOUND; DIFFUSION TOMOGRAPHY; REGION BOUNDARIES; BREAST-CANCER;
RECONSTRUCTION; SPECTROSCOPY; TISSUE; MAMMOGRAPHY
AB We investigate the feasibility of trans-rectal optical tomography of the prostate using an endo-rectal near-infrared (NIR) applicator that is to be integrated with a trans-rectal ultrasound (TRUS) probe. Integration with TRUS ensures accurate endo-rectal positioning of the NIR applicator and the utility of using TRUS spatial prior information to guide NIR image reconstruction. The prostate NIR image reconstruction is challenging even with the use of spatial prior owing to the anatomic complexity of the imaging domain. A hierarchical reconstruction algorithm is developed that implements cascaded initial-guesses for nested domains. This hierarchical image reconstruction method is then applied to evaluating a number of NIR applicator designs for integration with a sagittal TRUS transducer. A NIR applicator configuration feasible for instrumentation development is proposed that contains one linear array of optodes on each lateral side of the sagittal TRUS transducer. The performance of this NIR applicator is characterized for the recovery of single tumor mimicking lesion as well as dual targets in the prostate. The results suggest a strong feasibility of trans-rectal prostate imaging by use of the endo-rectal NIR/US probe. (C) 2008 Optical Society of America
C1 [Xu, Guan; Piao, Daqing; Bunting, Charles F.] Oklahoma State Univ, Sch Elect & Comp Engn, Stillwater, OK 74078 USA.
[Musgrove, Cameron H.] Sandia Natl Labs, Albuquerque, NM 87155 USA.
[Dehghani, Hamid] Univ Exeter, Sch Phys, Exeter EX4 4QL, Devon, England.
RP Piao, D (reprint author), Oklahoma State Univ, Sch Elect & Comp Engn, Stillwater, OK 74078 USA.
EM daqing.piao@okstate.edu
RI Bunting, Charles/B-9762-2013
OI Bunting, Charles/0000-0001-9167-4235
FU Prostate Cancer Research Program of the U. S. Army Medical Research
Acquisition Activity (USAMRAA) [W81XWH-07-1-0247]
FX This work has been supported by the Prostate Cancer Research Program of
the U. S. Army Medical Research Acquisition Activity (USAMRAA), 820
Chandler Street, Fort Detrick MD, 21702-5014, through grant
#W81XWH-07-1-0247. The content of the information does not necessarily
reflect the position or the policy of the USARAA, and no official
endorsement should be inferred. Comments and questions may be directed
to Daqing Piao at daqing.piao@okstate.edu.
NR 46
TC 22
Z9 23
U1 0
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 OCT 27
PY 2008
VL 16
IS 22
BP 17484
EP 17504
DI 10.1364/OE.16.017484
PG 21
WC Optics
SC Optics
GA 371XL
UT WOS:000260865900037
PM 18958030
ER
PT J
AU Berrocal, E
Kristensson, E
Richter, M
Linne, M
Alden, M
AF Berrocal, Edouard
Kristensson, Elias
Richter, Mattias
Linne, Mark
Alden, Marcus
TI Application of structured illumination for multiple scattering
suppression in planar laser imaging of dense sprays
SO OPTICS EXPRESS
LA English
DT Article
ID DIAGNOSTICS; ATTENUATION; VELOCIMETRY; MICROSCOPE; IMAGES; LIGHT
AB A novel approach to reduce the multiple light scattering contribution in planar laser images of atomizing sprays is reported. This new technique, named Structured Laser Illumination Planar Imaging (SLIPI), has been demonstrated in the dense region of a hollow-cone water spray generated in ambient air at 50 bars injection pressure. The idea is based on using an incident laser sheet which is spatially modulated along the vertical direction. By properly shifting the spatial phase of the modulation and using post-processing of the successive recorded images, the blurring effects from multiple light scattering can be mitigated. Since hollow-cone sprays have a known inner structure in the central region, the efficiency of the method could be evaluated. We demonstrate, for the case of averaged images, that an unwanted contribution of 44% of the detected light intensity can be removed. The suppression of this diffuse light enables an increase from 55% to 80% in image contrast. Such an improvement allows a more accurate description of the near-field region and of the spray interior. The possibility of extracting instantaneous flow motion is also shown, here, for a dilute flow of water droplets. These results indicate promising applications of the technique to denser two-phase flows such as air-blast atomizer and diesel sprays. (C) 2008 Optical Society of America
C1 [Berrocal, Edouard; Kristensson, Elias; Richter, Mattias; Linne, Mark; Alden, Marcus] Lund Inst Technol, Dept Combust Phys, S-22100 Lund, Sweden.
[Linne, Mark] Sandia Natl Labs, Livermore, CA 94551 USA.
RP Berrocal, E (reprint author), Lund Inst Technol, Dept Combust Phys, Box 118, S-22100 Lund, Sweden.
EM edouard.berrocal@forbrf.lth.se
FU Centre for Combustion Science and Technology (CECOST) through SSF and
STEM
FX The authors wish to show their appreciation to the Linne Centre within
the Lund Laser Centre (LLC) as well as the Centre for Combustion Science
and Technology (CECOST) through SSF and STEM for financial support. The
authors would like to acknowledge also Dr. Ulf Goransson and Dr. Bjarne
Paulsen Husted for lending their spray equipment.
NR 20
TC 49
Z9 49
U1 0
U2 10
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 OCT 27
PY 2008
VL 16
IS 22
BP 17870
EP 17881
DI 10.1364/OE.16.017870
PG 12
WC Optics
SC Optics
GA 371XL
UT WOS:000260865900075
PM 18958069
ER
PT J
AU Penciu, RS
Aydin, K
Kafesaki, M
Koschny, T
Ozbay, E
Economou, EN
Soukoulis, CM
AF Penciu, R. S.
Aydin, K.
Kafesaki, M.
Koschny, Th.
Ozbay, E.
Economou, E. N.
Soukoulis, C. M.
TI Multi-gap individual and coupled split-ring resonator structures
SO OPTICS EXPRESS
LA English
DT Article
ID LEFT-HANDED MATERIALS; ELECTROMAGNETICALLY INDUCED TRANSPARENCY;
NEGATIVE REFRACTIVE-INDEX; MAGNETIC-RESONANCE; METAMATERIALS; BEHAVIOR;
DESIGN; MU
AB We present a systematic numerical study, validated by accompanied experimental data, of individual and coupled split ring resonators (SRRs) of a single rectangular ring with one, two and four gaps. We discuss the behavior of the magnetic resonance frequency, the magnetic field and the currents in the SRRs, as one goes from a single SRR to strongly interacting SRR pairs in the SRR plane. We show that coupling of the SRRs along the E direction results to shift of the magnetic resonance frequency to lower or higher values, depending on the capacitive or inductive nature of the coupling. Strong SRR coupling along propagation direction usually results to splitting of the single SRR resonance into two distinct resonances, associated with peculiar field and current distributions. (C) 2008 Optical Society of America
C1 [Penciu, R. S.; Kafesaki, M.; Koschny, Th.; Economou, E. N.; Soukoulis, C. M.] FORTH, Inst Elect Struct & Laser, Iraklion 71110, Crete, Greece.
[Aydin, K.; Ozbay, E.] Bilkent Univ, Dept Elect & Elect Engn, Dept Phys, Nanotechnol Res Ctr, TR-06800 Ankara, Turkey.
[Kafesaki, M.; Soukoulis, C. M.] Univ Crete, Dept Mat Sci & Technol, Iraklion, Greece.
[Koschny, Th.; Soukoulis, C. M.] Iowa State Univ, Dept Phys, Ames, IA USA.
[Koschny, Th.; Soukoulis, C. M.] Iowa State Univ, Ames Lab, Ames, IA USA.
[Economou, E. N.] Univ Crete, Dept Phys, Iraklion, Greece.
RP Kafesaki, M (reprint author), FORTH, Inst Elect Struct & Laser, POB 1527, Iraklion 71110, Crete, Greece.
EM kafesaki@iesl.forth.gr
RI Aydin, Koray/D-5100-2009; Aydin, Koray/G-2537-2011; Economou,
Eleftherios /E-6374-2010; Kafesaki, Maria/E-6843-2012; Soukoulis,
Costas/A-5295-2008
OI Aydin, Koray/0000-0002-3268-2216; Kafesaki, Maria/0000-0002-9524-2576;
FU EU [LSHG-CT-2003-503259]; PHOME [213390]; US Department of Energy (Basic
Energy Sciences) [DE-AC02-07CH11358]; AFOSR under MURI
[FA9550-06-1-0337]; DARPA [MDA-972-01-2-0016]; Office of Naval Research
[N00014-07-1-0359]
FX Authors would like to acknowledge financial support by EU under the
projects Metamorphose, PHOREMOST, Molecular Imaging
(LSHG-CT-2003-503259), PHOME (FET Contract No. 213390) and ENSEMBLE, by
the US Department of Energy (Basic Energy Sciences) under Contract No.
DE-AC02-07CH11358, by the AFOSR under MURI grant (FA9550-06-1-0337), by
DARPA (Contract No. MDA-972-01-2-0016), by Office of Naval Research
(Award No. N00014-07-1-0359).
NR 35
TC 54
Z9 55
U1 0
U2 17
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 OCT 27
PY 2008
VL 16
IS 22
BP 18131
EP 18144
DI 10.1364/OE.16.018131
PG 14
WC Optics
SC Optics
GA 371XL
UT WOS:000260865900097
PM 18958091
ER
PT J
AU Graves, CR
Schelter, EJ
Cantat, T
Scott, BL
Kiplinger, JL
AF Graves, Christopher R.
Schelter, Eric J.
Cantat, Thibault
Scott, Brian L.
Kiplinger, Jaqueline L.
TI A Mild Protocol To Generate Uranium(IV) Mixed-Ligand Metallocene
Complexes using Copper(I) Iodide
SO ORGANOMETALLICS
LA English
DT Article
ID VALENT ORGANOURANIUM COMPLEXES; HYDROGEN-DEUTERIUM EXCHANGE;
ORGANO-METALLIC COMPOUNDS; EARLY ACTINIDE COMPLEXES; X-RAY STRUCTURES;
C-H ACTIVATION; F-ELEMENT; ELECTRONIC-STRUCTURE; FUNCTIONAL-GROUPS;
REACTIVITY
AB Reaction of the trivalent uranium complexes (C(5)Me(5))(2)UI(THF) (1), (C(5)Me(5))(2)U[N(SiMe(3))(2)] (3), (C(5)Me(5))(2)U(NPh(2))(THF) (4), and (C(5)Me(5))(2)U(O-2,6-(i)Pr(2)-C(6)H(3))(THF) (5) with copper(I) iodide affords the corresponding tetravalent uranium diiodide, amide iodide, and aryloxide iodide complexes (C(5)Me(5))(2)UI(2) (2), (C(5)Me(5))(2)U[N(SiMe(3))(2)](I) (6), (C(5)Me(5))(2)U(NPh(2))(I) (7) and (C(5)Me(5))(2)U(O-2,6-(i)Pr(2)-C(6)H(3))(I) (8), respectively. This protocol was also extended to the synthesis of the alkyl iodide complex (C(5)Me(5))(2)U(CHPh(2))(I) (10). The isolation of complex 10 from the in situ generated trivalent uranium alkyl complex (C(5)Me(5))(2)U(CHPh(2))(THF) (9) illustrates the synthetic value of this oxidation procedure in those situations where the uranium(III) metallocene complex cannot be isolated or is unstable. Overoxidation and ligand redistribution are not observed with this Cu-based U(III) -> U(IV) oxidation procedure. Attempted functionalization of the U(IV) amide iodide complex (C(5)Me(5))(2)U[N(SiMe(3))(2)](I) (6) with Me(2)Mg afforded the novel azametallacycle (C(5)Me(5))(2)U[eta(2)(N,C)-CH(2)SiMe(2)N(SiMe(3))] (12) by intramoiecular C-H activation and liberation of methane. Reaction between (C(5)Me(5))(2)U(NPh(2))(I) (7) and Me(2)Mg afforded a mixture of the products (C(5)Me(5))(2)U(NPh(2))(Me) (13), (C(5)Me(5))(2)UMe(2) (14), and (C(5)Me(5))(2)U(NPh(2))(2) (15) at room temperature; heating the mixture smoothly furnished the azametallacycle (C(5)Me(5))(2)U[eta(2)(N,C)-(o-C(6)H(4))NPh] (16). Similarly, reaction between 14 and HNPh(2) at 100 degrees C produced the azametallacycle 16 by aminolysis and subsequent intramolecular C-H activation.
C1 [Graves, Christopher R.; Schelter, Eric J.; Cantat, Thibault; Scott, Brian L.; Kiplinger, Jaqueline L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Kiplinger, JL (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM kiplinger@lanl.gov
RI Cantat, Thibault/A-8167-2010; Schelter, Eric/E-2962-2013; Kiplinger,
Jaqueline/B-9158-2011; Scott, Brian/D-8995-2017
OI Cantat, Thibault/0000-0001-5265-8179; Kiplinger,
Jaqueline/0000-0003-0512-7062; Scott, Brian/0000-0003-0468-5396
FU LANL; Division of Chemical Sciences, Office of Basic Energy Sciences,
Heavy Element Chemistry program; LANL Laboratory Directed Research &
Development program
FX For financial support of this work, we acknowledge the LANL (Director's
PD Fellowships to C.R.G., T.C., and E.J.S.; Frederick Reines PD
Fellowship to E.J.S.), the LANL G. T. Seaborg Institute (PD Fellowships
to C.R.G. and E.J.S.), the Division of Chemical Sciences, Office of
Basic Energy Sciences, Heavy Element Chemistry program, and the LANL
Laboratory Directed Research & Development program.
NR 54
TC 38
Z9 39
U1 0
U2 8
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0276-7333
J9 ORGANOMETALLICS
JI Organometallics
PD OCT 27
PY 2008
VL 27
IS 20
BP 5371
EP 5378
DI 10.1021/om800622g
PG 8
WC Chemistry, Inorganic & Nuclear; Chemistry, Organic
SC Chemistry
GA 359LS
UT WOS:000259988800026
ER
PT J
AU Keating, GN
Pelletier, JD
Valentine, GA
Statham, W
AF Keating, Gordon N.
Pelletier, Jon D.
Valentine, Greg A.
Statham, William
TI Evaluating suitability of a tephra dispersal model as part of a risk
assessment framework
SO JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
LA English
DT Article
DE tephra dispersal; tephra redistribution; risk assessment; surficial
processes; numerical modeling; uncertainty
ID RADIOACTIVE-WASTE REPOSITORY; VOLUME BASALTIC VOLCANOS; YUCCA MOUNTAIN;
SOUTHERN NEVADA; PYROCLASTIC FLOWS; PLUMBING SYSTEMS; NEW-ZEALAND;
ERUPTION; USA; SIMULATION
AB In volcanic risk assessment it is necessary to determine the appropriate level of sophistication for a given predictive model within the contexts of multiple sources of uncertainty and coupling between models. A component of volcanic risk assessment for the proposed radioactive waste repository at Yucca Mountain (Nevada, USA) involves prediction of dispersal of contaminated tephra during violent Strombolian eruptions and the subsequent transport of that tephra toward a hypothetical individual via surface processes. We test the suitability of a simplified model for volcanic plume transport and fallout tephra deposition (ASHPLUME) coupled to a surface sediment-transport model (FAR) that calculates the redistribution of tephra, and in light of inherent uncertainties in the system. The study focuses on two simplifying assumptions in the ASHPLUME model: 1) constant eruptive column height and 2) constant wind speed and direction during an eruption. Variations in tephra dispersal resulting from unsteady column height and wind conditions produced variations up to a factor of two in the concentration of tephra in sediment transported to the control population. However, the effects of watershed geometry and terrain, which control local remobilization of tephra, overprint sensitivities to eruption parameters. Because the combination of models used here shows limited sensitivity to the actual details of ash fall, a simple fall model suffices to estimate tephra mass delivered to the hypothetical individual. Published by Elsevier B.V.
C1 [Keating, Gordon N.] Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
[Pelletier, Jon D.] Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA.
[Valentine, Greg A.] SUNY Buffalo, Dept Geol, Buffalo, NY 14260 USA.
[Statham, William] AREVA Fed Serv LLC, Las Vegas, NV 89144 USA.
RP Keating, GN (reprint author), Los Alamos Natl Lab, Div Earth & Environm Sci, MS D452, Los Alamos, NM 87545 USA.
EM gkeating@lanl.gov; jdpellet@email.arizona.edu; gav4@buffalo.edu;
wstatha@sandia.gov
NR 35
TC 1
Z9 1
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0377-0273
J9 J VOLCANOL GEOTH RES
JI J. Volcanol. Geotherm. Res.
PD OCT 25
PY 2008
VL 177
IS 2
BP 397
EP 404
DI 10.1016/j.jvolgeores.2008.06.007
PG 8
WC Geosciences, Multidisciplinary
SC Geology
GA 375NG
UT WOS:000261120000007
ER
PT J
AU Radhakrishnan, B
Sarma, GB
AF Radhakrishnan, B.
Sarma, G. B.
TI Coupled simulations of texture evolution during deformation and
recrystallization of fcc and bcc metals
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article; Proceedings Paper
CT Symposium on Advances in Microstructure-Based Modeling and
Characterization of Deformation Microstructures held at 2007 TMS Annual
Meeting
CY FEB 26-28, 2007
CL Orlando, FL
SP Minerals, Metals, Mat Soc
DE Recrystallization; Nucleation; Texture
ID MONTE-CARLO-SIMULATION; ALUMINUM-ALLOYS; COLD; ORIENTATION; BICRYSTALS;
STEEL; SHEET
AB Thermo-mechanical processing to produce optimum grain structure and texture is essential for the successful utilization of commercial aluminum alloys and steels as sheet products. Several modeling techniques have been developed in the past with a reasonably good predictive capability for bulk deformation textures. However, prediction of texture evolution during recrystallization remains very challenging because of uncertainties involved in predicting the mechanisms that lead to nuclei formation and crystallographic orientations of the nuclei, and the uncertainties involved in predicting the grain boundary properties that determine the growth kinetics of the nuclei. We present some of our recent work in modeling the recrystallization textures following cold deformation in polycrystalline bcc metals and hot-deformation in fcc metals. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Radhakrishnan, B.; Sarma, G. B.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Radhakrishnan, B (reprint author), Oak Ridge Natl Lab, 1 Bethel Valley Rd, Oak Ridge, TN 37831 USA.
EM radhakrishnb@ornl.gov
NR 21
TC 15
Z9 16
U1 3
U2 16
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD OCT 25
PY 2008
VL 494
IS 1-2
SI SI
BP 73
EP 79
DI 10.1016/j.msea.2007.10.094
PG 7
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 359JU
UT WOS:000259983700011
ER
PT J
AU Sarma, GB
Radhakrishnan, B
AF Sarma, G. B.
Radhakrishnan, B.
TI Modeling the effect of microstructural features on the nucleation of
creep cavities
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article; Proceedings Paper
CT Symposium on Advances in Microstructure-Based Modeling and
Characterization of Deformation Microstructures held at 2007 TMS Annual
Meeting
CY FEB 26-28, 2007
CL Orlando, FL
SP Minerals, Metals, Mat Soc
DE Deformation model; Finite element; Crystal plasticity; Microstructure;
Creep cavities
ID POLYCRYSTALLINE MATERIALS; DEFORMATION; PLASTICITY; TEXTURE; STEEL
AB A crystal plasticity based finite element model has been applied to study the deformation of metals at the microstructural length scale, in order to determine the effect of various microstructural features on the nucleation of creep cavities. The deformation model captures the non-uniform distributions of the equivalent plastic strain and the hydrostatic stress within the different grains of the microstructure when subjected to cyclic loading conditions. The influence of various microstructural features such as grain boundaries, triple junctions, and second-phase particles, on the strain and stress fields is examined through the simulations. The results indicate that the various microstructural parameters, such as grain orientation, presence of the precipitates and their shape, and alignment of the boundaries with respect to the loading direction influence the strain and stress distributions, and therefore, the conditions that favor the nucleation and growth of creep cavities. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Sarma, G. B.; Radhakrishnan, B.] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
RP Sarma, GB (reprint author), Oak Ridge Natl Lab, Div Math & Comp Sci, POB 2008, Oak Ridge, TN 37831 USA.
EM sarmag@ornl.gov
NR 16
TC 5
Z9 6
U1 2
U2 4
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD OCT 25
PY 2008
VL 494
IS 1-2
SI SI
BP 92
EP 102
DI 10.1016/j.msea.2007.10.095
PG 11
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 359JU
UT WOS:000259983700014
ER
PT J
AU Hibbard, GD
Radmilovic, V
Aust, KT
Erb, U
AF Hibbard, G. D.
Radmilovic, V.
Aust, K. T.
Erb, U.
TI Grain boundary migration during abnormal grain growth in nanocrystalline
Ni
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE Nanostructured materials; Grain growth; Nickel; In situ electron
microscopy
ID THERMAL-STABILITY; INSITU TEM; ALLOY; METALS; NICKEL; ELECTRODEPOSITS;
MOTION; COPPER
AB The transformation mechanisms of abnormal grain growth in nanocrystalline Ni were studied extensively by transmission electron microscopy (TEM). A combination of in situ TEM annealing and ex situ annealing followed by TEM characterization was used. It was observed that grain boundary migration is both spatially and temporally non-uniform; migration occurs in a series of discrete steps, which are followed by periods of stagnation. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Hibbard, G. D.; Aust, K. T.; Erb, U.] Univ Toronto, Dept Mat Sci & Engn, Toronto, ON M5S 3E4, Canada.
[Radmilovic, V.] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
RP Hibbard, GD (reprint author), Univ Toronto, Dept Mat Sci & Engn, 184 Coll St,Room 140, Toronto, ON M5S 3E4, Canada.
EM glenn.hibbard@utoronto.ca
FU Natural Sciences and Engineering Research Council of Canada (NSERC);
U.S. Department of Energy [DE-AC02-05CH11231]
FX The authors would like to acknowledge the contributions of Dr. C. Yanar.
This work was supported by the Natural Sciences and Engineering Research
Council of Canada (NSERC). In situ TEM analysis was performed at the
National Center for Electron Microscopy (NCEM), LBNL, University of
California, Berkeley. The NCEM is supported by the Director, Office of
Science, U.S. Department of Energy, under Contract No.
DE-AC02-05CH11231.
NR 37
TC 21
Z9 21
U1 3
U2 31
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD OCT 25
PY 2008
VL 494
IS 1-2
SI SI
BP 232
EP 238
DI 10.1016/j.msea.2008.04.054
PG 7
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 359JU
UT WOS:000259983700033
ER
PT J
AU Buchheit, AA
Hilmas, GE
Fahrenholtz, WG
Deason, DM
Wang, H
AF Buchheit, Andrew A.
Hilmas, Greg E.
Fahrenholtz, William G.
Deason, Douglas M.
Wang, Hsin
TI Mechanical and thermal properties of AlN-BN-SiC ceramics
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE Aluminum nitride; Boron nitride; Silicon carbide; Mechanical properties;
Thermal properties; Hot pressing
ID BORON NITRIDE COMPOSITES; SITU REACTION SYNTHESIS; SILICON-CARBIDE;
FABRICATION; SYSTEM
AB Mechanical and thermal properties were characterized for two AlN:BN:SiC composite ceramics produced from BN with different particle sizes. The ceramics were hot pressed at temperatures from 1950 to 2100 degrees C to similar to 97% relative density. For both materials, the matrix (90:10 vol% SiC:AlN) had a grain size of similar to 0.4 mu m, and the BN grains (10 vol%) were crystallographically aligned. Microhardness values were between 20 and 22 GPa, while fracture toughness values were between 2.5 and 3.1 MPa m(1/2). Other Properties were found to be dependent on testing direction. Elastic moduli were between 260 and 300 GPa and strengths were similar to 630 MPa for small particle BN additions. Thermal conductivity was calculated to be between 25 and 37W/m K at room temperature and 17 and 25 W/m K at 900 degrees C. The low values compared to traditional SiC ceramics were attributed to AlN-SiC solid solution formation and sub-micron matrix grain sizes. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Buchheit, Andrew A.; Hilmas, Greg E.; Fahrenholtz, William G.] Missouri Univ Sci & Technol, Dept Mat Sci & Engn, Rolla, MO 65409 USA.
[Deason, Douglas M.] USA, Space & Missile Def Command, Redstone Arsenal, AL 35898 USA.
[Wang, Hsin] Oak Ridge Natl Lab, High Temp Mat Lab, Oak Ridge, TN 37831 USA.
RP Hilmas, GE (reprint author), Missouri Univ Sci & Technol Missouri S & T, Dept Mat Sci & Engn, 222 McNutt Hall,1400 N Bishop Ave, Rolla, MO 65409 USA.
EM aab@mst.edu; ghilmas@mst.edu
RI Wang, Hsin/A-1942-2013;
OI Wang, Hsin/0000-0003-2426-9867; Fahrenholtz, William/0000-0002-8497-0092
NR 28
TC 10
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U1 2
U2 15
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 OCT 25
PY 2008
VL 494
IS 1-2
SI SI
BP 239
EP 246
DI 10.1016/j.msea.2008.05.051
PG 8
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 359JU
UT WOS:000259983700034
ER
PT J
AU Hodge, AM
Kumar, M
Martin, LP
Campbell, GH
AF Hodge, Andrea M.
Kumar, Mukul
Martin, L. Peter
Campbell, Geoffrey H.
TI Intermetallic layer formation and its effect on the mechanical behavior
of laminated Ta-Au composites
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE Laminates; Composites; AuTa
ID SELF-DIFFUSION; TANTALUM; ALLOYS; GOLD
AB The tensile properties and deformation behavior of Ta-Au laminated composites processed by diffusion bonding are presented. The formation of the Ta-Au interface region was characterized using XRD, SEM and nanoindentation in order to identify the phases present. Tensile test results showed that the composition of the interface region strongly affects the overall sample behavior. The data indicates that the interface region tends to form into a stable AuTa phase. The overall material strength and ductility are then related to the composition of the intermediate interface layer. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Hodge, Andrea M.] Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA.
[Hodge, Andrea M.; Kumar, Mukul; Martin, L. Peter; Campbell, Geoffrey H.] Lawrence Livermore Natl Lab, Div Mat Sci & Technol, Livermore, CA 94550 USA.
RP Hodge, AM (reprint author), Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA.
EM ahodge@usc.edu
RI Campbell, Geoffrey/F-7681-2010
FU U.S. Department of Energy; Lawrence Livermore National Laboratory
[W-7405-Eng-48]; Laboratory Directed Research and Development Program
[06-SI-005]
FX 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 project 06-SI-005 was
funded by the Laboratory Directed Research and Development Program at
LLNL. The authors thank B. Olsen, E. Sedillo, D. Freeman and Dr. C. Saw
at LLNL for their assistance in sample in preparation, testing and
characterization.
NR 16
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U1 2
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PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD OCT 25
PY 2008
VL 494
IS 1-2
SI SI
BP 276
EP 280
DI 10.1016/j.msea.2008.04.016
PG 5
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 359JU
UT WOS:000259983700039
ER
PT J
AU Martin, M
Shen, T
Thadhani, NN
AF Martin, M.
Shen, T.
Thadhani, N. N.
TI Instrumented anvil-on-rod impact experiments for validating constitutive
strength model for simulating transient dynamic deformation response of
metals
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE Constitutive behavior; Polycrystalline material; Stress waves; Impact
testing
ID FLAT-ENDED PROJECTILES; TAYLOR-TEST; ELEVATED-TEMPERATURES;
PLASTIC-DEFORMATION; STRAIN RATES; COPPER; CYLINDERS; CONSTANTS;
VELOCITY; BEHAVIOR
AB Instrumented anvil-on-rod impact experiments were performed to access the applicability of this approach for validating a constitutive strength model for dynamic, transient-state deformation and elastic-plastic wave interactions in vanadium, 21-6-9 stainless steel, titanium, and Ti-6Al-4V. In addition to soft-catching the impacted rod-shaped samples, their transient deformation states were captured by high-speed imaging, and velocity interferometry was used to record the sample back (free) surface velocity and monitor elastic-plastic wave interactions. Simulations utilizing AUTODYN-2D hydrocode with Steinberg-Guinan constitutive equation were used to generate simulated free Surface velocity traces and final/transient deformation profiles for comparisons with experiments. The simulations were observed to under-predict the radial strain for bcc vanadium and fcc steel, but over-predict the radial strain for hcp titanium and Ti-6Al-4V. The correlations illustrate the applicability of the instrumented anvil-on-rod impact test as a method for providing robust model validation based on the entire deformation event, and not just the final deformed state. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Martin, M.; Thadhani, N. N.] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
[Shen, T.] Lawrence Livermore Natl Lab, Mat Sci & Technol Div, Livermore, CA 94550 USA.
RP Thadhani, NN (reprint author), Georgia Inst Technol, Sch Mat Sci & Engn, 771 Ferst Dr, Atlanta, GA 30332 USA.
EM naresh.thadhani@mse.gatech.edu
RI Trexler, Morgana/E-9003-2013
FU U.S. Department of Energy by University of California; Lawrence
Livermore National Laboratory [W-7405-Eng-48]; ARO
[E-48148-MS-000-05123-1]; NASA Jenkins Predoctoral Fellowship
FX 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, and in part by ARO Grant No.
E-48148-MS-000-05123-1 (Dr. Mullins program monitor). M.M. is a
recipient of the NASA Jenkins Predoctoral Fellowship.
NR 32
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U1 2
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PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD OCT 25
PY 2008
VL 494
IS 1-2
SI SI
BP 416
EP 424
DI 10.1016/j.msea.2008.04.062
PG 9
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 359JU
UT WOS:000259983700058
ER
PT J
AU Beverly, KN
Sawaya, MR
Schmid, E
Koehler, CM
AF Beverly, Kristen N.
Sawaya, Michael R.
Schmid, Einhard
Koehler, Carla M.
TI The Tim8-Tim13 Complex Has Multiple Substrate Binding Sites and Binds
Cooperatively to Tim23
SO JOURNAL OF MOLECULAR BIOLOGY
LA English
DT Article
DE mitochondria; protein translocation; surface plasmon resonance;
cooperativity; chaperone
ID MITOCHONDRIAL INTERMEMBRANE SPACE; INNER MEMBRANE-PROTEINS;
CRYSTAL-STRUCTURE; CHAPERONE PREFOLDIN; ADP/ATP CARRIER; IMPORT;
REFINEMENT; MECHANISM; ACCURACY; SOFTWARE
AB The Tim8-Tim13 complex, located in the mitochondrial intermembrane space, functions in the TIM22 import pathway that mediates the import of the mitochondrial carriers Tim23, Tim22, and Tim17 into the mitochondrial inner membrane. The Tim8-Tim13 complex assembles as a hexamer and binds to the substrate Tim23 to chaperone the hydrophobic Tim23 across the aqueous intermembrane space. However, both structural features of the Tim8-Tim13 complex and the binding interaction to Tim23 remain poorly defined. The crystal structure of the yeast Tim8-Tim13 complex, reported here at 2.6 angstrom resolution, reveals that the architecture of the Tim8-Tim13 complex is similar to those of other chaperones such as Tim9-Tim10, prefoldin, and Skp, in which long helices extend from a central body like tentacles from a jellyfish. Surface plasmon resonance was applied to investigate interactions between the Tim8-Tim13 complex and Tim23. The Tim8-Tim13 complex contained approximately six binding sites and showed a complex binding interaction indicative of positive cooperativity rather than a simple bimolecular interaction. By combining results from the structural and binding studies, we provide a molecular model of the Tim8-Tim13 complex binding to Tim23. The regions where the tentacle helices attach to the body of the Tim8-Tim13 complex contain six hydrophobic pockets that likely interact with specific sequences of Tim23 and possibly other Substrates. Smaller hydrophobic patches on the tentacles themselves likely interact nonspecifically with the Substrate's transmembrane helices, shielding it from the aqueous intermembrane space. The central region of Tim23, which enters the intermembrane space first, may serve to nucleate the binding of the Tim8-Tim13 complex, thereby initiating the chaperoned translocation of Tim23 to the mitochondrial inner membrane. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Beverly, Kristen N.; Schmid, Einhard; Koehler, Carla M.] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA.
[Sawaya, Michael R.] Univ Calif Los Angeles, Howard Hughes Med Inst, DOE, Inst Genom & Proteom, Los Angeles, CA 90095 USA.
RP Koehler, CM (reprint author), Univ Calif Los Angeles, Dept Chem & Biochem, Box 951569, Los Angeles, CA 90095 USA.
EM koehler@chem.ucla.edu
OI Sawaya, Michael/0000-0003-0874-9043
FU National Institutes of Health [GM070404, 1R01GM61721, 23616-002-06];
Department of Energy [DE-FC03-02ER63421]; American Heart Association
[0640076N]
FX We thank Dr. Martin Phillips (University of California, Los Angeles) for
technical assistance with the instrumentation, the UCLA-DOE X-ray Core
Technology Center for X-ray crystallography experiments and modeling
analysis, and Dr. Steven Claypool for critical reading of the
manuscript. C.M. K. is an established investigator of the American Heart
Association. This work was supported by grants from the National
Institutes of Health (United States Public Health Service National
Service Award GM070404 to K.N.B., 1R01GM61721 to C.M.K., and
23616-002-06 to M.R.S.), the Department of Energy (DE-FC03-02ER63421 to
M.R.S.), and the American Heart Association (0640076N to C.M.K.).
NR 44
TC 24
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U1 0
U2 2
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 OCT 24
PY 2008
VL 382
IS 5
BP 1144
EP 1156
DI 10.1016/j.jmb.2008.07.069
PG 13
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 363LY
UT WOS:000260270000005
PM 18706423
ER
PT J
AU Vrinceanu, D
Balaraman, GS
Collins, LA
AF Vrinceanu, D.
Balaraman, G. S.
Collins, L. A.
TI The King model for electrons in a finite-size ultracold plasma
SO JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
LA English
DT Article
ID COLD
AB A self-consistent model for a finite-size non-neutral ultracold plasma is obtained by extending a conventional model of globular star clusters. This model describes the dynamics of electrons at quasi-equilibrium trapped within the potential created by a cloud of stationary ions. A random sample of electron positions and velocities can be generated with the statistical properties defined by this model.
C1 [Vrinceanu, D.; Collins, L. A.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Balaraman, G. S.] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA.
RP Vrinceanu, D (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA.
FU US Department of Energy at Los Alamos National Laboratory
[DE-AC52-06NA25396]
FX This work has been supported by the US Department of Energy at Los
Alamos National Laboratory under contract no. DE-AC52-06NA25396.
NR 12
TC 4
Z9 4
U1 1
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1751-8113
J9 J PHYS A-MATH THEOR
JI J. Phys. A-Math. Theor.
PD OCT 24
PY 2008
VL 41
IS 42
AR 425501
DI 10.1088/1751-8113/41/42/425501
PG 10
WC Physics, Multidisciplinary; Physics, Mathematical
SC Physics
GA 355HG
UT WOS:000259699400015
ER
PT J
AU Bunker, BC
AF Bunker, Bruce C.
TI Reversible switching of interfacial interactions
SO MATERIALS SCIENCE & ENGINEERING R-REPORTS
LA English
DT Review
DE Interfacial interactions; Self-assembled monolayers (SAMs); Programmable
interfaces; Programmable materials; Switchable films
ID SELF-ASSEMBLED MONOLAYERS; RESPONSIVE FUSION PROTEIN; CONTACT-ANGLE
MEASUREMENT; LIQUID-CRYSTAL ALIGNMENT; ACTIVE CONTROL; MOLECULAR
MACHINES; FERROCENE DERIVATIVES; BETA-CYCLODEXTRIN; FORCE MICROSCOPY;
COATED SURFACES
AB The key to assembling and manipulating materials ranging in size from molecules to microns involves controlling how the materials interact with each other or with patterned substrates. The focus of this review involves recent work in which researchers are learning how to use materials such as self-assembled monolayers (SAMS) to reversibly program interfacial interactions using external stimuli including heat, light, and electric fields. Using such stimuli, it has been shown that intermolecular and surface forces including electrical double layer interactions, hydration forces, pi-stacking interactions, and hydrophobic/hydrophilic behavior can be switched back and forth between discrete states. Such switching allows surfaces to be programmed to grab or release generic classes of materials or specific objects based on programmed molecular recognition. This review highlights strategies for developing and characterizing responsive interfaces, shows how such surfaces have been exploited in microfluidic systems, and explores the promise of switchable materials for creating responsive and adaptable materials in three dimensions. Published by Elsevier B.V.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Bunker, BC (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM bcbunke@sandia.gov
FU United States Department of Energy [DE-AC04-94A18500]; Sandia National
Laboratories
FX The author would like to thank colleagues who have collaborated with him
on projects related to the topic area, including Jim Voigt, Jun Liu, Jim
Kushmerick, Dale Huber, Andrew Boal, Matt Farrow, Jack Houston, Bill
Smith, Murat Okandan, Kevin Zavadil, Graham Yelton, George Bachand, Judy
Hendricks, and Bruce Kay. The author is also thankful for support by the
Division of Materials Science and Engineering of the Office of Basic
Energy Sciences of the United States Department of Energy as well as
Laboratory Directed Research and Development funding from Sandia
National Laboratories. Sandia National Laboratories is a multiprogram
laboratory operated by Sandia Corporation, a Lockheed Martin Company,
for the United States Department of Energy under Contract
DE-AC04-94A18500.
NR 138
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U1 7
U2 47
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0927-796X
EI 1879-212X
J9 MAT SCI ENG R
JI Mater. Sci. Eng. R-Rep.
PD OCT 24
PY 2008
VL 62
IS 5
BP 157
EP 173
DI 10.1016/j.mser.2008.06.001
PG 17
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 376DX
UT WOS:000261164500001
ER
PT J
AU Mao, DYL
Neculai, D
Downey, M
Orlicky, S
Haffani, YZ
Ceccarelli, DF
Ho, JSL
Szilard, RK
Zhang, W
Ho, CS
Wan, L
Fares, C
Rumpel, S
Kurinov, I
Arrowsmith, CH
Durocher, D
Sicheri, F
AF Mao, Daniel Y. L.
Neculai, Dante
Downey, Michael
Orlicky, Stephen
Haffani, Yosr Z.
Ceccarelli, Derek F.
Ho, Jenny S. L.
Szilard, Rachel K.
Zhang, Wei
Ho, Cynthia S.
Wan, Leo
Fares, Christophe
Rumpel, Sigrun
Kurinov, Igor
Arrowsmith, Cheryl H.
Durocher, Daniel
Sicheri, Frank
TI Atomic Structure of the KEOPS Complex: An Ancient Protein
Kinase-Containing Molecular Machine
SO MOLECULAR CELL
LA English
DT Article
ID AUTOMATED STRUCTURE SOLUTION; TELOMERE LENGTH; YEAST; NMR; MODEL;
REFINEMENT; EXPRESSION; MECHANISM; COUPLINGS; ALIGNMENT
AB Kae1 is a universally conserved ATPase and part of the essential gene set in bacteria. In archaea and eukaryotes, Kae1 is embedded within the protein kinase-containing KEOPS complex. Mutation of KEOPS subunits in yeast leads to striking telomere and transcription defects, but the exact biochemical function of KEOPS is not known. As a first step to elucidating its function, we solved the atomic structure of archaea-derived KEOPS complexes involving Kae1, Bud32, Pcc1, and Cgi121 subunits. Our studies suggest that Kae1 is regulated at two levels by the primordial protein kinase Bud32, which is itself regulated by Cgi121. Moreover, Pcc1 appears to function as a dimerization module, perhaps suggesting that KEOPS may be a processive molecular machine. Lastly, as Bud32 lacks the conventional substrate-recognition infrastructure of eukaryotic protein kinases including an activation segment, Bud32 may provide a glimpse of the evolutionary history of the protein kinase family.
C1 [Mao, Daniel Y. L.; Neculai, Dante; Downey, Michael; Orlicky, Stephen; Haffani, Yosr Z.; Ceccarelli, Derek F.; Szilard, Rachel K.; Zhang, Wei; Ho, Cynthia S.; Wan, Leo; Durocher, Daniel; Sicheri, Frank] Mt Sinai Hosp, Samuel Lunenfeld Res Inst, Toronto, ON M5G 1X5, Canada.
[Downey, Michael; Zhang, Wei; Durocher, Daniel; Sicheri, Frank] Univ Toronto, Dept Mol Genet, Toronto, ON M5S 1A8, Canada.
[Ho, Jenny S. L.] Hosp Sick Children, Program Dev & Stem Cell Biol, Toronto, ON M5G 1X8, Canada.
[Fares, Christophe; Rumpel, Sigrun; Arrowsmith, Cheryl H.] Univ Toronto, Ontario Canc Inst, Dept Med Biophys, Toronto, ON M5G 1L7, Canada.
[Kurinov, Igor] Cornell Univ, Dept Chem & Biol Chem, NE CAT, Adv Photon Source, Argonne, IL 60439 USA.
RP Durocher, D (reprint author), Mt Sinai Hosp, Samuel Lunenfeld Res Inst, 600 Univ Ave, Toronto, ON M5G 1X5, Canada.
EM durocher@mshri.on.ca; sicheri@mshri.on.ca
RI Neculai, Dante/A-9923-2011; Durocher, Daniel/A-7733-2010; Sicheri,
Frank/F-8856-2013; Neculai, Dante/M-2884-2013
OI Durocher, Daniel/0000-0003-3863-8635;
FU National Center for Research Resources [FIR 15301]; U.S. Department of
Energy [DE-AC02-06CH11357]; CIHR [MOP 79441]; Canadian Cancer Society
[017220]; NCIC; CIHR; German Academic Exchange Service (DAAD)
FX We thank Steve Bell for help in identifying archaeal KEOPS orthologs and
Domenico Libri for strains/plasmids. Research conducted at the NE-CAT
beamlines (Advanced Photon Source) was supported by the National Center
for Research Resources (NIH, award FIR 15301) and the U.S. Department of
Energy (Office of Basic Energy Sciences, contract DE-AC02-06CH11357).
D.D. is a Canada Research Chair (Tier 11). This work was funded by
grants from the CIHR (MOP 79441) to D.D. and the Canadian Cancer Society
to F.S. (grant 017220). D.Y.L.M. and D.N. were supported by NCIC and
CIHR postdoctoral fellowships. respectively. S.R. was supported by a
postdoctoral fellowship of the German Academic Exchange Service (DAAD).
NR 45
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U1 2
U2 6
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 1097-2765
J9 MOL CELL
JI Mol. Cell
PD OCT 24
PY 2008
VL 32
IS 2
BP 259
EP 275
DI 10.1016/j.molcel.2008.10.002
PG 17
WC Biochemistry & Molecular Biology; Cell Biology
SC Biochemistry & Molecular Biology; Cell Biology
GA 367IX
UT WOS:000260546800014
PM 18951093
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
Carrera, E
Carvalho, W
Casey, BCK
Castilla-Valdez, H
Cerminara, G
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
DeVaughan, K
Degenhardt, JD
Deliot, F
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Demina, R
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Dudko, LV
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Gay, P
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Gerber, CE
Gershtein, Y
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Ginther, G
Gollub, N
Gomez, B
Goussiou, A
Grannis, PD
Greenlee, H
Greenwood, ZD
Gregores, EM
Grenier, G
Gris, P
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Grunewald, MW
Guo, F
Guo, J
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Gutierrez, P
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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
Hoeth, H
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
Kalk, JM
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, 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
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
Razumov, I
Renkel, P
Rich, P
Rieger, J
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
Steele, 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
Tamburello, P
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
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
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Demina, R.
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Denisov, S. P.
Desai, S.
Diehl, H. T.
Diesburg, M.
Dominguez, A.
Dong, H.
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.
Facini, G.
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.
Gollub, N.
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.
Hoeth, H.
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.
Kalk, J. M.
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, 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.
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.
Garzon, G. J. Otero y
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.
Razumov, I.
Renkel, P.
Rich, P.
Rieger, J.
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.
Steele, 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.
Tamburello, P.
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.
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.
TI Observation of ZZ Production in p(p)over-bar Collisions at root s=1.96
TeV
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID PAIR PRODUCTION
AB We present an observation for ZZ -> l(+) l(-) l'(+) l'(-) (l, l' =e or mu) production in p (p) over bar collisions at a center-of-mass energy of root s = 1.96 TeV. Using 1.7 fb(-1) of data collected by the D0 experiment at the Fermilab Tevatron Collider, we observe three candidate events with an expected background of 0.14(-0.02)(+0.03) events. The significance of this observation is 5.3 standard deviations. The combination of D0 results in this channel, as well as in ZZ -> l(+) l(-) v (v) over bar yields a significance of 5.7 standard deviations and a combined cross section of sigma(ZZ) = 1.60 +/- 0.63(stat)(-0.17)(+0.16)(syst) pb.
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.] Ctr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, Brazil.
[Jesus, A. C. S. Assis; Begalli, M.; Carvalho, W.; Martins, C. De Oliveira; Luna, R.; 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, Z.; 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, CNRS, IN2P3, LPC, Clermont, France.
[Arnoud, Y.; Chevallier, F.; Crepe-Renaudin, S.; Martin, B.; Sajot, G.; Stark, J.] Univ Grenoble 1, CNRS, IN2P3, Inst Natl Polytech Grenoble,LPSC, Grenoble, France.
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[Geist, W.; Ripp-Baudot, I.; Siccardi, V.] Univ Strasbourg 1, CNRS, IN2P3, IPHC, Strasbourg, France.
[Biscarat, C.; Grenier, G.; Kurca, T.; Lebrun, P.; Muanza, G. S.; Verdier, P.] Univ Lyon 1, CNRS, IN2P3, IPNL, F-69622 Villeurbanne, France.
[Biscarat, C.; Grenier, G.; Kurca, T.; Lebrun, P.; Muanza, G. S.; 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, G.] 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.
[Hoeth, H.; Maettig, P.; Peters, Y.; Rangel, M. S.; 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.; Shivpuri, R. 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.
[Castilla-Valdez, H.; De La Cruz-Burelo, E.; 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.
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[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.
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[Bezzubov, V. A.; Denisov, D.; Evdokimov, V. N.; Kozelov, A. V.; Lipaev, V. V.; Popov, A. V.; Razumov, I.; 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.; Gollub, N.; Strandberg, S.] Lund Univ, Lund, Sweden.
[Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, S.] Royal Inst Technol, Stockholm, Sweden.
[Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, S.] Stockholm Univ, S-10691 Stockholm, Sweden.
[Asman, B.; Belanger-Champagne, C.; Gollub, N.; 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.; Christoudias, T.; 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.; Tamburello, P.; Varnes, E. W.] Univ Arizona, Tucson, AZ 85721 USA.
[Madaras, R. J.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Madaras, R. J.] Univ Calif Berkeley, 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.; Li, Q. Z.; Lincoln, D.; Lipton, R.; Lyon, A. L.; Merritt, K. W.; Naimuddin, M.; O'Dell, V.; Oshima, N.; Garzon, G. J. Otero y; 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.; Chakraborty, D.; 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.; Rieger, J.; 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.; Svoisky, P.; 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.; Kalk, J. M.; Sawyer, L.; Steele, J.; 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.; Cerminara, G.; Facini, G.; Hesketh, G.; Wood, D. R.] Northeastern Univ, Boston, MA 02115 USA.
[Alton, A.; Degenhardt, J. D.; Magerkurth, A.; Neal, H. A.; Qian, J.; Strandberg, S.; 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.; DeVaughan, 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.
[Dong, H.; 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.; Christofek, L.; 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 Li, Liang/O-1107-2015; Ancu, Lucian Stefan/F-1812-2010; De,
Kaushik/N-1953-2013; Fisher, Wade/N-4491-2013; Alves,
Gilvan/C-4007-2013; Deliot, Frederic/F-3321-2014; Sharyy,
Viatcheslav/F-9057-2014; Kupco, Alexander/G-9713-2014; 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; Gutierrez,
Phillip/C-1161-2011; bu, xuebing/D-1121-2012; Novaes,
Sergio/D-3532-2012; Mercadante, Pedro/K-1918-2012; Mundim,
Luiz/A-1291-2012; Yip, Kin/D-6860-2013; 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
OI Li, Liang/0000-0001-6411-6107; Ancu, Lucian Stefan/0000-0001-5068-6723;
De, Kaushik/0000-0002-5647-4489; 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; Novaes,
Sergio/0000-0003-0471-8549; Mundim, Luiz/0000-0001-9964-7805; Yip,
Kin/0000-0002-8576-4311; Dudko, Lev/0000-0002-4462-3192;
FU 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);
Alexander von Humboldt Foundation (Germany); Istituto Nazionale di
Fisica Nucleare (Italy)
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); Alexander von Humboldt Foundation (Germany); and
the Istituto Nazionale di Fisica Nucleare (Italy).
NR 16
TC 15
Z9 15
U1 0
U2 6
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 OCT 24
PY 2008
VL 101
IS 17
AR 171803
DI 10.1103/PhysRevLett.101.171803
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 365CN
UT WOS:000260383600018
ER
PT J
AU Alvarez, G
Dagotto, E
AF Alvarez, G.
Dagotto, E.
TI Fermi Arcs in the Superconducting Clustered State for Underdoped Cuprate
Superconductors
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
AB The one-particle spectral function of a state formed by superconducting (SC) clusters is studied via Monte Carlo techniques. The clusters have similar SC amplitudes but randomly distributed phases. This state is stabilized by competition with the antiferromagnetism expected to be present in the cuprates and after quenched disorder is introduced. A Fermi surface composed of disconnected segments, i.e., Fermi arcs, is observed between the critical temperature T(c) and the cluster formation temperature scale T(*).
C1 [Alvarez, G.] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
[Alvarez, G.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
[Dagotto, E.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Dagotto, E.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Alvarez, G (reprint author), Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
FU NSF [DMR-0706020]; Scientific User Facilities; BES-DOE
FX Work supported by the NSF Grant No. DMR-0706020, the Div. of Mat.
Science and Eng., U. S. DOE, under contract with UT-Battelle, LLC, and
by the CNMS, sponsored by the Scientific User Facilities Div., BES-DOE.
NR 17
TC 16
Z9 16
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 OCT 24
PY 2008
VL 101
IS 17
AR 177001
DI 10.1103/PhysRevLett.101.177001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 365CN
UT WOS:000260383600052
PM 18999774
ER
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Taras, P
Viaud, FB
Nicholson, H
De Nardo, G
Lista, L
Monorchio, D
Sciacca, C
Baak, MA
Raven, G
Snoek, HL
Jessop, CP
Knoepfel, KJ
LoSecco, JM
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
Gaz, A
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
Malcles, J
Ocariz, J
Perez, A
Prendki, J
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
Biesiada, J
Lau, YP
Pegna, DL
Lu, C
Olsen, J
Smith, AJS
Telnov, AV
Baracchini, E
Cavoto, G
del Re, D
Di Marco, E
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Jackson, PD
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
Roethel, W
Wilson, FF
Emery, S
Escalier, M
Gaidot, A
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
Glanzman, T
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
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
Bula, R
Ernst, JA
Pan, B
Saeed, MA
Zain, SB
Spanier, SM
Wogsland, BJ
Eckmann, R
Ritchie, JL
Ruland, AM
Schilling, CJ
Schwitters, RF
Izen, JM
Lou, XC
Ye, S
Bianchi, F
Gamba, D
Pelliccioni, M
Bomben, M
Bosisio, L
Cartaro, C
Cossutti, F
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
Hamano, K
Kowalewski, R
Nugent, IM
Roney, JM
Sobie, RJ
Gershon, TJ
Harrison, PF
Ilic, J
Latham, TE
Mohanty, GB
Band, HR
Chen, X
Dasu, S
Flood, KT
Kutter, PE
Pan, Y
Pierini, M
Prepost, R
Vuosalo, CO
Wu, SL
AF Aubert, B.
Bona, M.
Karyotakis, Y.
Lees, J. P.
Poireau, V.
Prudent, X.
Tisserand, V.
Zghiche, A.
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.
Button-Shafer, J.
Cahn, R. N.
Jacobsen, R. G.
Kadyk, J. A.
Kerth, L. T.
Kolomensky, Yu. G.
Kukartsev, G.
Lynch, G.
Osipenkov, I. L.
Ronan, M. T.
Tackmann, K.
Tanabe, T.
Wenzel, W. A.
Hawkes, C. M.
Soni, N.
Watson, A. T.
Koch, H.
Schroeder, T.
Walker, D.
Asgeirsson, D. J.
Cuhadar-Donszelmann, T.
Fulsom, B. G.
Hearty, C.
Mattison, T. S.
McKenna, J. A.
Barrett, M.
Khan, A.
Saleem, M.
Teodorescu, L.
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.
Paar, H. P.
Rahatlou, S.
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.
Schalk, T.
Schumm, B. A.
Seiden, A.
Wilson, M. G.
Winstrom, L. O.
Chen, E.
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.
Blanc, F.
Bloom, P. C.
Ford, W. T.
Hirschauer, J. F.
Kreisel, A.
Nagel, M.
Nauenberg, U.
Olivas, A.
Smith, J. G.
Ulmer, K. A.
Wagner, S. R.
Ayad, R.
Gabareen, A. M.
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.
Klose, V.
Kobel, M. J.
Lacker, H. M.
Mader, W. F.
Nogowski, R.
Schubert, J.
Schubert, K. R.
Schwierz, R.
Sundermann, J. E.
Volk, A.
Bernard, D.
Bonneaud, G. R.
Latour, E.
Thiebaux, Ch.
Verderi, M.
Clark, P. J.
Gradl, W.
Playfer, S.
Robertson, A. I.
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.
Prencipe, E.
Santoro, V.
Anulli, F.
Baldini-Ferroli, R.
Calcaterra, A.
de Sangro, R.
Finocchiaro, G.
Pacetti, S.
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Nicholson, H.
De Nardo, G.
Lista, L.
Monorchio, D.
Sciacca, C.
Baak, M. A.
Raven, G.
Snoek, H. L.
Jessop, C. P.
Knoepfel, K. J.
LoSecco, J. M.
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.
Gaz, A.
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.
Malcles, J.
Ocariz, J.
Perez, A.
Prendki, J.
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.
Biesiada, J.
Lau, Y. P.
Pegna, D. Lopes
Lu, C.
Olsen, J.
Smith, A. J. S.
Telnov, A. V.
Baracchini, E.
Cavoto, G.
del Re, D.
Di Marco, E.
Faccini, R.
Ferrarotto, F.
Ferroni, F.
Gaspero, M.
Jackson, P. D.
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.
Roethel, W.
Wilson, F. F.
Emery, S.
Escalier, M.
Gaidot, A.
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.
Glanzman, T.
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.
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.
Bula, R.
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.
Izen, J. M.
Lou, X. C.
Ye, S.
Bianchi, F.
Gamba, D.
Pelliccioni, M.
Bomben, M.
Bosisio, L.
Cartaro, C.
Cossutti, F.
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.
Hamano, K.
Kowalewski, R.
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.
Kutter, P. E.
Pan, Y.
Pierini, M.
Prepost, R.
Vuosalo, C. O.
Wu, S. L.
TI Measurement of the CP Asymmetry in b -> s gamma Using a Sum of Exclusive
Final States
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DECAY B->S-GAMMA; PHYSICS; VIOLATION; MODEL
AB We perform a measurement of the CP asymmetry in b -> s gamma decays using a sample of 383 x 10(6) B (B) over bar events collected by the BABAR detector at the SLAC PEP-II asymmetric B factory. We reconstruct 16 flavor-specific B decay modes containing a high-energy photon and a hadronic system X-s containing an s quark. We measure the CP asymmetry to be -0.011 +/- 0.030(stat) +/- 0.014(syst) for a hadronic system mass between 0.6 and 2.8 GeV/c(2).
C1 [Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Prudent, X.; Tisserand, V.; Zghiche, A.] CNRS, Phys Particules Lab, IN2P3, F-74941 Annecy Le Vieux, France.
[Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prudent, X.; Tisserand, V.; Zghiche, A.] Univ Savoie, F-74941 Annecy Le Vieux, France.
[Tico, J. Garra; Grauges, E.] Univ Barcelona, Fac Fis, Dept Estructura & Constituents Mat, E-08028 Barcelona, Spain.
[Lopez, L.; Palano, A.; Pappagallo, M.] Univ Bari, Dipartmento Fis, I-70126 Bari, Italy.
[Lopez, L.; Palano, A.; Pappagallo, M.] Ist Nazl Fis Nucl, 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.; Button-Shafer, J.; Cahn, R. N.; Jacobsen, R. G.; Kadyk, J. A.; Kerth, L. T.; Kolomensky, Yu. G.; Kukartsev, G.; Lynch, G.; Osipenkov, I. L.; Ronan, M. T.; Tackmann, K.; Tanabe, T.; Wenzel, W. A.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Abrams, G. S.; Battaglia, M.; Brown, D. N.; Button-Shafer, J.; Cahn, R. N.; Jacobsen, R. G.; Kadyk, J. A.; Kerth, L. T.; Kolomensky, Yu. G.; Kukartsev, G.; Lynch, G.; Osipenkov, I. L.; Ronan, M. T.; Tackmann, K.; Tanabe, T.; Wenzel, W. A.] Univ Calif Berkeley, 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.; Cuhadar-Donszelmann, T.; Fulsom, B. G.; Hearty, C.; Mattison, T. S.; McKenna, J. A.] Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
[Barrett, M.; Khan, A.; Saleem, M.; Teodorescu, L.] 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.
[Paar, H. P.; Rahatlou, S.; 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.; 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.
[Chen, E.; 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.
[Blanc, F.; Bloom, P. C.; Ford, W. T.; Hirschauer, J. F.; Kreisel, A.; Nagel, M.; Nauenberg, U.; Olivas, A.; Smith, J. G.; Ulmer, K. A.; Wagner, S. R.] Univ Colorado, Boulder, CO 80309 USA.
[Ayad, R.; Gabareen, A. M.; 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.] Univ Dortmund, Inst Phys, D-4421 Dortmund, Germany.
[Klose, V.; Kobel, M. J.; Lacker, H. M.; Mader, W. F.; Nogowski, R.; Schubert, J.; Schubert, K. R.; Schwierz, R.; Sundermann, J. E.; Volk, A.] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
[Bernard, D.; Bonneaud, G. R.; Latour, E.; Thiebaux, Ch.; Verderi, M.] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
[Clark, P. J.; Gradl, W.; Playfer, S.; Robertson, A. I.; 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.; Prencipe, E.; Santoro, V.] Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy.
[Andreotti, M.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cecchi, A.; Cibinetto, G.; Franchini, P.; Luppi, E.; Negrini, M.; Petrella, A.; Piemontese, L.; Prencipe, E.; Santoro, V.] Ist Nazl Fis Nucl, I-44100 Ferrara, Italy.
[Anulli, F.; 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.] Univ Genoa, Dipartimento Fis, I-16146 Genoa, 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, I-16146 Genoa, Italy.
[Chaisanguanthum, K. S.; Morii, M.] Harvard Univ, Cambridge, MA 02138 USA.
[Dubitzky, R. S.; Marks, J.; Schenk, S.; Uwer, U.] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany.
[Bard, D. J.; Dauncey, P. D.; Nash, J. A.; Vazquez, W. Panduro; 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.; Eyges, V.; 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.
[Denig, A. G.; Fritsch, M.; Schott, G.] Univ Karlsruhe, Inst Expt Kernphys, D-76021 Karlsruhe, Germany.
[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.; Wang, W. F.; Wormser, G.] CNRS, IN2P3, Lab Accelerateur Lineaire, 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.; Wang, W. F.; Wormser, G.] Univ Paris 11, Ctr Sci, 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.; 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.
[Alwyn, K. E.; Barlow, N. R.; Barlow, R. J.; Chia, Y. M.; Edgar, C. L.; 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.; Hertzbach, S. S.; Li, X.; Salvati, E.; Saremi, S.] Univ Massachusetts, Amherst, MA 01003 USA.
[Cowan, R.; Dujmic, D.; Fisher, P. H.; Koeneke, K.; Sciolla, G.; Spitznagel, M.; Taylor, F.; Yamamoto, R. K.; Zhao, M.] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
[Mclachlin, S. E.; Patel, P. M.; Robertson, S. H.] McGill Univ, Montreal, PQ H3A 2T8, Canada.
[Lazzaro, A.; Lombardo, V.; Palombo, F.] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
[Lazzaro, A.; Lombardo, V.; Palombo, F.] Ist Nazl Fis Nucl, I-20133 Milan, Italy.
[Bauer, J. M.; Cremaldi, L.; Eschenburg, V.; Godang, R.; Kroeger, R.; Sanders, D. A.; Summers, D. J.; Zhao, H. W.] Univ Mississippi, University, MS 38677 USA.
[Brunet, S.; Cote, D.; 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.; Sciacca, C.] Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy.
[De Nardo, G.; Lista, L.; Monorchio, D.; Sciacca, C.] Ist Nazl Fis Nucl, I-80126 Naples, Italy.
[Baak, M. A.; Raven, G.; Snoek, H. L.] Natl Inst Nucl & High Energy Phys, NIKHEF, NL-1009 DB Amsterdam, Netherlands.
[Jessop, C. P.; Knoepfel, K. J.; LoSecco, J. M.] 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.; Gaz, A.; Margoni, M.; Morandin, M.; Posocco, M.; Rotondo, M.; Simonetto, F.; Stroili, R.; Voci, C.] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
[Castelli, G.; Gagliardi, N.; Gaz, A.; Margoni, M.; Morandin, M.; Posocco, M.; Rotondo, 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.; Malcles, J.; Ocariz, J.; Perez, A.; Prendki, J.] Univ Paris 07, Univ Paris 06, CNRS, Lab Phys Nucl & Haute Energies,IN2P3, F-75252 Paris, France.
[Gladney, L.] Univ Penn, Philadelphia, PA 19104 USA.
[Biasini, M.; Covarelli, R.; Manoni, E.] Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
[Biasini, M.; Covarelli, R.; Manoni, E.] Ist Nazl Fis Nucl, 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.] Univ Pisa, Dipartimento Fis, Scuola Normale Super Pisa, I-56127 Pisa, 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, I-56127 Pisa, Italy.
[Biesiada, J.; Lau, Y. P.; Pegna, D. Lopes; Lu, C.; Olsen, J.; Smith, A. J. S.; Telnov, A. V.] Princeton Univ, Princeton, NJ 08544 USA.
[Baracchini, E.; Cavoto, G.; del Re, D.; Di Marco, E.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Jackson, P. D.; Mazzoni, M. A.; Morganti, S.; Piredda, G.; Polci, F.; Renga, F.; Voena, C.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
[Baracchini, E.; Cavoto, G.; del Re, D.; Di Marco, E.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Jackson, P. D.; Mazzoni, M. A.; Morganti, S.; Piredda, G.; Polci, F.; Renga, F.; Voena, C.] Ist Nazl Fis Nucl, 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.; Roethel, W.; Wilson, F. F.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Emery, S.; Escalier, M.; Gaidot, A.; Ganzhur, S. F.; de Monchenault, G. Hamel; Kozanecki, W.; Vasseur, G.; Yeche, Ch.; Zito, M.] CEA Saclay, DSM Dapnia, 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.; Glanzman, T.; 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.; 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.; Bula, R.; 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.
[Izen, J. M.; Lou, X. C.; Ye, S.] Univ Texas Dallas, Richardson, TX 75083 USA.
[Bianchi, F.; Gamba, D.; Pelliccioni, M.] Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
[Bianchi, F.; Gamba, D.; Pelliccioni, M.] Ist Nazl Fis Nucl, I-10125 Turin, Italy.
[Bomben, M.; Bosisio, L.; Cartaro, C.; Cossutti, F.; Della Ricca, G.; Lanceri, L.; Vitale, L.] Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy.
[Bomben, M.; Bosisio, L.; Cartaro, C.; Cossutti, F.; Della Ricca, G.; Lanceri, L.; Vitale, L.] Ist Nazl Fis Nucl, 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.; Hamano, K.; Kowalewski, R.; 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.; Kutter, P. E.; Pan, Y.; Pierini, M.; Prepost, R.; Vuosalo, C. O.; Wu, S. L.] Univ Wisconsin, Madison, WI 53706 USA.
RP Aubert, B (reprint author), CNRS, Phys Particules Lab, IN2P3, F-74941 Annecy Le Vieux, France.
RI dong, liaoyuan/A-5093-2015; Rizzo, Giuliana/A-8516-2015; 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; Di Lodovico, Francesca/L-9109-2016; Pappagallo,
Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey,
Raymond/E-2830-2016; 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; de Sangro,
Riccardo/J-2901-2012; Saeed, Mohammad Alam/J-7455-2012; Della Ricca,
Giuseppe/B-6826-2013
OI Raven, Gerhard/0000-0002-2897-5323; Cibinetto,
Gianluigi/0000-0002-3491-6231; dong, liaoyuan/0000-0002-4773-5050;
Pacetti, Simone/0000-0002-6385-3508; Covarelli,
Roberto/0000-0003-1216-5235; Rizzo, Giuliana/0000-0003-1788-2866;
Paoloni, Eugenio/0000-0001-5969-8712; Faccini,
Riccardo/0000-0003-2613-5141; 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; Bettarini,
Stefano/0000-0001-7742-2998; 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; de Sangro,
Riccardo/0000-0002-3808-5455; Saeed, Mohammad Alam/0000-0002-3529-9255;
Della Ricca, Giuseppe/0000-0003-2831-6982
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 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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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 OCT 24
PY 2008
VL 101
IS 17
AR 171804
DI 10.1103/PhysRevLett.101.171804
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 365CN
UT WOS:000260383600019
PM 18999741
ER
PT J
AU Kim, KW
Gu, GD
Homes, CC
Noh, TW
AF Kim, K. W.
Gu, G. D.
Homes, C. C.
Noh, T. W.
TI Bound Excitons in Sr2CuO3
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID TEMPERATURE-DEPENDENCE; OPTICAL-ABSORPTION; SPECTRUM
AB We investigated temperature dependent optical spectra of the one-dimensional chain compound Sr2CuO3. The charge transfer transition polarized along the chain direction shows a strongly asymmetric line shape as expected in one-dimensional extended Hubbard model. At low temperature, the charge transfer peak shows a large blueshift and reveals additional sharp peaks at the gap. Even though many spectroscopic studies suggest that this material cannot have a bound exciton based on the one-dimensional extended Hubbard model, we attribute the additional sharp peaks to excitons, which come to exist due to the long-range Coulomb interaction.
C1 [Kim, K. W.] Univ Fribourg, Dept Phys, CH-1700 Fribourg, Switzerland.
[Kim, K. W.; Gu, G. D.; Homes, C. C.] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
[Kim, K. W.; Noh, T. W.] Seoul Natl Univ, Sch Phys, Seoul 151747, South Korea.
[Kim, K. W.; Noh, T. W.] Seoul Natl Univ, Res Ctr Oxide Elect, Seoul 151747, South Korea.
RP Kim, KW (reprint author), Univ Fribourg, Dept Phys, Chemin Muse 3, CH-1700 Fribourg, Switzerland.
EM kyungwan.kim@gmail.com
RI Kim, Kyungwan/A-9242-2012; Gu, Genda/D-5410-2013; Noh, Tae Won
/K-9405-2013
OI Kim, Kyungwan/0000-0003-3833-5378; Gu, Genda/0000-0002-9886-3255;
FU Schweizer Nationalfonds (SNF) [200020-119784]; Department of Energy
[DE-AC02-98CH10886]; Creative Research Initiatives; Brain Korea 21
Project; MOST; POSCO
FX K. W. Kim acknowledges discussions with D. Baeriswyl, E. Jeckelmann, C.
Bernhard, and A. Dubroka. This work is supported by the Schweizer
Nationalfonds (SNF) with Grant No. 200020-119784, by the Department of
Energy under Contract No. DE-AC02-98CH10886, by the Creative Research
Initiatives (Functionally Integrated Oxide Heterostructure) of KOSEF,
and by the Brain Korea 21 Project in 2002. The experiments at PLS was
supported by MOST and POSCO.
NR 21
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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 OCT 24
PY 2008
VL 101
IS 17
AR 177404
DI 10.1103/PhysRevLett.101.177404
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 365CN
UT WOS:000260383600064
PM 18999786
ER
PT J
AU Liu, C
Samolyuk, GD
Lee, Y
Ni, N
Kondo, T
Santander-Syro, AF
Bud'ko, SL
McChesney, JL
Rotenberg, E
Valla, T
Fedorov, AV
Canfield, PC
Harmon, BN
Kaminski, A
AF Liu, Chang
Samolyuk, G. D.
Lee, Y.
Ni, Ni
Kondo, Takeshi
Santander-Syro, A. F.
Bud'ko, S. L.
McChesney, J. L.
Rotenberg, E.
Valla, T.
Fedorov, A. V.
Canfield, P. C.
Harmon, B. N.
Kaminski, A.
TI K-Doping Dependence of the Fermi Surface of the Iron-Arsenic
Ba1-xKxFe2As2 Superconductor Using Angle-Resolved Photoemission
Spectroscopy
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID LAO1-XFXFEAS; COMPOUND; GAP
AB We use angle-resolved photoemission spectroscopy to investigate the electronic properties of the newly discovered iron-arsenic superconductor Ba1-xKxFe2As2 and nonsuperconducting BaFe2As2. Our study indicates that the Fermi surface of the undoped, parent compound BaFe2As2 consists of hole pocket(s) at Gamma (0,0) and larger electron pocket(s) at X (1,0), in general agreement with full-potential linearized plane wave calculations. Upon doping with potassium, the hole pocket expands and the electron pocket becomes smaller with its bottom approaching the chemical potential. Such an evolution of the Fermi surface is consistent with hole doping within a rigid-band shift model. Our results also indicate that the full-potential linearized plane wave calculation is a reasonable approach for modeling the electronic properties of both undoped and K-doped iron arsenites.
C1 [Liu, Chang; Samolyuk, G. D.; Lee, Y.; Ni, Ni; Kondo, Takeshi; Bud'ko, S. L.; Canfield, P. C.; Harmon, B. N.; Kaminski, A.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
[Liu, Chang; Samolyuk, G. D.; Lee, Y.; Ni, Ni; Kondo, Takeshi; Bud'ko, S. L.; Canfield, P. C.; Harmon, B. N.; Kaminski, A.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Santander-Syro, A. F.] ESPCI, CNRS, UPR 5, Lab Phys & Matiere, F-75231 Paris 5, France.
[Santander-Syro, A. F.] Univ Paris 11, CNRS, UMR 8502, Phys Solides Lab, F-91405 Orsay, France.
[McChesney, J. L.; Rotenberg, E.; Fedorov, A. V.] Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
[Valla, T.] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
RP Liu, C (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
RI Rotenberg, Eli/B-3700-2009; Santander-Syro, Andres/D-7017-2012;
McChesney, Jessica/K-8911-2013; Canfield, Paul/H-2698-2014; Kondo,
Takeshi/H-2680-2016
OI Rotenberg, Eli/0000-0002-3979-8844; Santander-Syro,
Andres/0000-0003-3966-2485; McChesney, Jessica/0000-0003-0470-2088;
FU Department of Energy Basic Energy Sciences [DE-AC02-07CH11358]; US DOE
[DE-AC03-76SF00098, DE-AC02-98CH10886]; LPEM
FX We are grateful for useful discussions with Jorg Schmalian. We thank
Helen Fretwell for useful remarks and corrections. Work at 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. Brookhaven National Laboratory
is supported by US DOE under Contract No. DE-AC02-98CH10886. A. F. S. S.
thanks LPEM for financial support.
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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 OCT 24
PY 2008
VL 101
IS 17
AR 177005
DI 10.1103/PhysRevLett.101.177005
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 365CN
UT WOS:000260383600056
PM 18999778
ER
PT J
AU Matveev, KA
Furusaki, A
AF Matveev, K. A.
Furusaki, A.
TI Spectral Functions of Strongly Interacting Isospin-1/2 Bosons in One
Dimension
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID TONKS-GIRARDEAU GAS; IMPENETRABLE BOSONS; HUBBARD-MODEL
AB We study a system of one-dimensional (iso)spin-1/2 bosons in the regime of strong repulsive interactions. We argue that the low-energy spectrum of the system consists of acoustic density waves and the spin excitations described by an effective ferromagnetic spin chain with a small exchange constant J. We use this description to compute the dynamic spin structure factor and the spectral functions of the system.
C1 [Matveev, K. A.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Furusaki, A.] RIKEN, Condensed Matter Theory Lab, Wako, Saitama 3510198, Japan.
RP Matveev, KA (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Furusaki, Akira/B-3204-2008
OI Furusaki, Akira/0000-0001-8394-0003
FU U.S. DOE; Office of Science [DE-AC02-06CH11357]; MEXT of Japan
[16GS0219]
FX The authors are grateful to T. Giamarchi, L. I. Glazman, G. V.
Shlyapnikov, and M. B. Zvonarev for stimulating discussions. K. A. M. is
grateful to RIKEN for hospitality. This work was supported by the U.S.
DOE, Office of Science, under Contract No. DE-AC02-06CH11357, and by
Grant-in-Aid for Scientific Research (Grant No. 16GS0219) from MEXT of
Japan.
NR 25
TC 26
Z9 26
U1 0
U2 2
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 OCT 24
PY 2008
VL 101
IS 17
AR 170403
DI 10.1103/PhysRevLett.101.170403
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 365CN
UT WOS:000260383600003
PM 18999725
ER
PT J
AU Park, T
Bauer, ED
Thompson, JD
AF Park, Tuson
Bauer, E. D.
Thompson, J. D.
TI Probing the Nodal Gap in the Pressure-Induced Heavy Fermion
Superconductor CeRhIn(5)
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DENSITY-OF-STATES; UNCONVENTIONAL SUPERCONDUCTIVITY; WAVE
SUPERCONDUCTORS; CECOIN5; VORTEX; FIELD; DEPENDENCE
AB We report field-orientation specific heat studies of the pressure-induced heavy-fermion superconductor CeRhIn(5). These experiments provide the momentum-dependent superconducting gap function for the first time in any pressure-induced superconductor. In the coexisting phase of superconductivity and antiferromagnetism, field rotation within the Ce-In plane reveals fourfold modulation in the density of states, which favors a d-wave order parameter and constrains a theory of the interplay between superconductivity and magnetism.
C1 [Park, Tuson; Bauer, E. D.; Thompson, J. D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Park, Tuson] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea.
RP Park, T (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RI Bauer, Eric/D-7212-2011; Park, Tuson/A-1520-2012;
OI Bauer, Eric/0000-0003-0017-1937
FU Los Alamos LDRD program; Korea Science and Engineering Foundation
(KOSEF); Korea government [R01-2008-000-10570-0]
FX The authors thank I. Vekhter for discussion. Work at Los Alamos was
performed under the auspices of the U. S. Department of Energy/Office of
Science and supported by the Los Alamos LDRD program. T. P acknowledges
a grant from the Korea Science and Engineering Foundation (KOSEF) funded
by the Korea government R01-2008-000-10570-0.
NR 28
TC 22
Z9 23
U1 1
U2 6
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 OCT 24
PY 2008
VL 101
IS 17
AR 177002
DI 10.1103/PhysRevLett.101.177002
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 365CN
UT WOS:000260383600053
PM 18999775
ER
PT J
AU Polomarov, O
Kaganovich, I
Shvets, G
AF Polomarov, Oleg
Kaganovich, Igor
Shvets, Gennady
TI Merging of Super-Alfvenic Current Filaments During Collisionless Weibel
Instability of Relativistic Electron Beams
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID MAGNETIC-FIELDS; ELECTROMAGNETIC INSTABILITIES; PLASMA; IGNITION;
TRANSPORT; SHOCKS; WAVES
AB The theoretical framework predicting the long-term evolution, structure, and coalescence energetics of current filaments during the Weibel instability of an electron beam in a collisionless plasma is developed. We emphasize the nonlinear stage of the instability, during which the beam density of filaments increases to the background ion density, and the ambient plasma electrons are fully expelled from the filaments. Our analytic and numerical results demonstrate that the beam filaments can carry super-Alfvenic currents and develop hollow-current density profiles. This explains why the initially increasing magnetic field energy eventually decreases during the late stage of the instability.
C1 [Polomarov, Oleg; Shvets, Gennady] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA.
[Polomarov, Oleg; Shvets, Gennady] Univ Texas Austin, Inst Fus Studies, Austin, TX 78712 USA.
[Kaganovich, Igor] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Polomarov, O (reprint author), Univ Texas Austin, Dept Phys, Austin, TX 78712 USA.
FU U. S. DOE [DE-FG02-05ER54840]
FX This work was supported by the U. S. DOE Grant No. DE-FG02-05ER54840. We
thank E. Startsev, A. Pukhov, A. Spitkovsky, U. Keshet, and S. Kalmykov
for fruitful discussions.
NR 22
TC 17
Z9 17
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 OCT 24
PY 2008
VL 101
IS 17
AR 175001
DI 10.1103/PhysRevLett.101.175001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 365CN
UT WOS:000260383600033
PM 18999755
ER
PT J
AU Rosenberg, RA
Abu Haija, M
Ryan, PJ
AF Rosenberg, R. A.
Abu Haija, M.
Ryan, P. J.
TI Chiral-Selective Chemistry Induced by Spin-Polarized Secondary Electrons
from a Magnetic Substrate
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SCATTERING CROSS-SECTION; ASYMMETRIC PHOTOLYSIS; ORIGIN; LIFE; CO;
HOMOCHIRALITY; MOLECULES; EMISSION; SURFACES; LIGHT
AB We demonstrate for the first time that low-energy spin-polarized secondary electrons, produced by irradiation of a magnetic substrate, can induce chiral-selective chemistry. Our approach was to perform detailed measurements of the reaction rate for x-ray induced, secondary electron photolysis of a model chiral compound, (R)- or (S)-2-butanol, adsorbed on a magnetized Permalloy substrate. The results showed that there is an enhancement of similar to 10% in the rate of CO bond cleavage that depends on the chirality of the molecule and the spin polarization of the substrate secondary electrons.
C1 [Rosenberg, R. A.; Abu Haija, M.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Ryan, P. J.] Ames Lab, MUCAT, Ames, IA 50011 USA.
RP Rosenberg, RA (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RI Rosenberg, Richard/K-3442-2012
FU U. S. Department of Energy; Office of Science; Office of Basic Energy
Sciences [DE-AC02-06CH11357]
FX We would like to thank Dr. Neal Fairley for customizing CASAXPS to
import our XPS data format. We would also like to thank the APS
Accelerator Systems Division Groups for maintaining such a stable beam,
which was essential for the success of these experiments. This work was
performed at the Advanced Photon Source and was supported by the U. S.
Department of Energy, Office of Science, Office of Basic Energy Sciences
under Contract No. DE-AC02-06CH11357.
NR 29
TC 29
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U1 1
U2 6
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 OCT 24
PY 2008
VL 101
IS 17
AR 178301
DI 10.1103/PhysRevLett.101.178301
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 365CN
UT WOS:000260383600070
PM 18999792
ER
PT J
AU Simon, F
Dora, B
Muranyi, F
Janossy, A
Garaj, S
Forro, L
Bud'ko, S
Petrovic, C
Canfield, PC
AF Simon, F.
Dora, B.
Muranyi, F.
Janossy, A.
Garaj, S.
Forro, L.
Bud'ko, S.
Petrovic, C.
Canfield, P. C.
TI Generalized Elliott-Yafet Theory of Electron Spin Relaxation in Metals:
Origin of the Anomalous Electron Spin Lifetime in MgB(2)
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID RESONANCE; SUPERCONDUCTIVITY; TRANSPORT
AB The temperature dependence of the electron-spin relaxation time in MgB(2) is anomalous as it does not follow the resistivity above 150 K; it has a maximum around 400 K and decreases for higher temperatures. This violates the well established Elliot-Yafet theory of spin relaxation in metals. The anomaly occurs when the quasiparticle scattering rate (in energy units) is comparable to the energy difference between the conduction and a neighboring bands. The anomalous behavior is related to the unique band structure of MgB(2) and the large electron-phonon coupling. The saturating spin relaxation is the spin transport analogue of the Ioffe-Regel criterion of electron transport.
C1 [Simon, F.; Dora, B.; Muranyi, F.; Janossy, A.] Budapest Univ Technol & Econ, Inst Phys, H-1521 Budapest, Hungary.
[Simon, F.; Dora, B.; Muranyi, F.; Janossy, A.] Hungarian Acad Sci, Condensed Matter Res Grp, H-1521 Budapest, Hungary.
[Dora, B.] Phys Komplexer Syst, Max Planck Inst, D-01187 Dresden, Germany.
[Garaj, S.; Forro, L.] Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, Inst Phys Complex Matter, FBS, CH-1015 Lausanne, Switzerland.
[Bud'ko, S.; Petrovic, C.; Canfield, P. C.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Bud'ko, S.; Petrovic, C.; Canfield, P. C.] Iowa State Univ, US Dept Energy, Ames Lab, Ames, IA 50011 USA.
RP Simon, F (reprint author), Budapest Univ Technol & Econ, Inst Phys, H-1521 Budapest, Hungary.
EM simon@esr.phy.bme.hu
RI Petrovic, Cedomir/A-8789-2009; Simon, Ferenc/G-7580-2011; Janossy,
Andras/H-5415-2012; Garaj, Slaven/B-9782-2013; Canfield,
Paul/H-2698-2014
OI Petrovic, Cedomir/0000-0001-6063-1881; Simon,
Ferenc/0000-0001-9822-4309; Garaj, Slaven/0000-0001-5529-4040;
FU Hungarian Academy of Sciences; Humboldt Foundation; Hungarian State
[F61733, K72613, NK60984]; Swiss NSF; Iowa State University
[W-7405-Eng-82]
FX We are grateful to J. Fabian and A. Virosztek for enlightening
discussions. F. S. and F. M. acknowledge the Bolyai programme of the
Hungarian Academy of Sciences and the Humboldt Foundation for support.
Work supported by the Hungarian State Grants (OTKA) No. F61733, K72613,
and NK60984. The work in Lausanne was supported by the Swiss NSF and its
NCCR "MaNEP.'' Ames Laboratory is operated for the U. S. Department of
Energy by Iowa State University under Contract No. W-7405-Eng-82.
NR 22
TC 10
Z9 10
U1 0
U2 6
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 OCT 24
PY 2008
VL 101
IS 17
AR 177003
DI 10.1103/PhysRevLett.101.177003
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 365CN
UT WOS:000260383600054
PM 18999776
ER
PT J
AU Sulai, IA
Wu, QX
Bishof, M
Drake, GWF
Lu, ZT
Mueller, P
Santra, R
AF Sulai, I. A.
Wu, Qixue
Bishof, M.
Drake, G. W. F.
Lu, Z. -T.
Mueller, P.
Santra, R.
TI Hyperfine Suppression of 2(3)S(1)-3(3)P(J) Transitions in (3)He
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID HELIUM FINE-STRUCTURE; ISOTOPE SHIFT; STATE; INTERVALS
AB Two anomalously weak transitions within the 2(3)S(1)-3(3)P(J) manifolds in (3)He have been identified. Their transition strengths are measured to be 1000 times weaker than that of the strongest transition in the same group. This dramatic suppression of transition strengths is due to the dominance of the hyperfine interaction over the fine-structure interaction. An alternative selection rule based on IS coupling (where the nuclear spin is first coupled to the total electron spin) is proposed. This provides qualitative understanding of the transition strengths. It is shown that the small deviations from the IS coupling model are fully accounted for by an exact diagonalization of the strongly interacting states.
C1 [Sulai, I. A.; Bishof, M.; Lu, Z. -T.; Mueller, P.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
[Sulai, I. A.; Lu, Z. -T.; Santra, R.] Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
[Sulai, I. A.; Bishof, M.; Lu, Z. -T.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
[Wu, Qixue; Drake, G. W. F.] Univ Windsor, Dept Phys, Windsor, ON N9B 3P4, Canada.
[Santra, R.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Sulai, IA (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RI Mueller, Peter/E-4408-2011; Santra, Robin/E-8332-2014
OI Sulai, Ibrahim/0000-0003-4631-7006; Mueller, Peter/0000-0002-8544-8191;
Santra, Robin/0000-0002-1442-9815
FU U.S. Department of Energy; Office of Nuclear Physics; Office of Basic
Energy Sciences; Office of Science [DE-AC02-06CH11357]; Natural Sciences
and Engineering Research Council of Canada; SHARCNET
FX We would like to thank K. Bailey and T. P. O'Connor for technical
support. This work was supported by the U.S. Department of Energy,
Office of Nuclear Physics and Office of Basic Energy Sciences, Office of
Science, under Contract No. DE-AC02-06CH11357. G. W. F. D. acknowledges
support by the Natural Sciences and Engineering Research Council of
Canada, and by SHARCNET.
NR 27
TC 6
Z9 6
U1 0
U2 7
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 OCT 24
PY 2008
VL 101
IS 17
AR 173001
DI 10.1103/PhysRevLett.101.173001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 365CN
UT WOS:000260383600022
PM 18999744
ER
PT J
AU Greaves, GN
Wilding, MC
Fearn, S
Langstaff, D
Kargl, F
Cox, S
Van, QV
Majerus, O
Benmore, CJ
Weber, R
Martin, CM
Hennet, L
AF Greaves, G. N.
Wilding, M. C.
Fearn, S.
Langstaff, D.
Kargl, F.
Cox, S.
Van, Q. Vu
Majerus, O.
Benmore, C. J.
Weber, R.
Martin, C. M.
Hennet, L.
TI Detection of first-order liquid/liquid phase transitions in yttrium
oxide-aluminum oxide melts
SO SCIENCE
LA English
DT Article
ID LIQUID-PHASE; HIGH-PRESSURE; GLASS; POLYMORPHISM; PHOSPHORUS;
SEPARATION; SILICON; SOLIDS; ICE
AB We combine small-angle x-ray scattering (SAXS) and wide-angle x-ray scattering (WAXS) with aerodynamic levitation techniques to study in situ phase transitions in the liquid state under contactless conditions. At very high temperatures, yttria-alumina melts show a first-order transition, previously inferred from phase separation in quenched glasses. We show how the transition coincides with a narrow and reversible maximum in SAXS indicative of liquid unmixing on the nanoscale, combined with an abrupt realignment in WAXS features related to reversible shifts in polyhedral packing on the atomic scale. We also observed a rotary action in the suspended supercooled drop driven by repetitive transitions (a polyamorphic rotor) from which the reversible changes in molar volume (1.2 +/- 0.2 cubic centimeters) and entropy (19 +/- 4 joules mole(-1) kelvin(-1)) can be estimated.
C1 [Greaves, G. N.; Wilding, M. C.; Fearn, S.; Langstaff, D.; Kargl, F.; Cox, S.; Van, Q. Vu] Aberystwyth Univ, Ctr Adv Funct Mat & Devices, Inst Math & Phys, Aberystwyth SY23 3BZ, Dyfed, Wales.
[Majerus, O.] Ecole Natl Super Chim Paris, F-75231 Paris, France.
[Benmore, C. J.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Weber, R.] Mat Dev, Arlington Hts, IL 60004 USA.
[Martin, C. M.] STFC Daresbury Lab, Synchrotron Radiat Source, Warrington WA4 4AD, Cheshire, England.
[Hennet, L.] CNRS CEMHTI, F-45071 Orleans 9, France.
RP Greaves, GN (reprint author), Aberystwyth Univ, Ctr Adv Funct Mat & Devices, Inst Math & Phys, Aberystwyth SY23 3BZ, Dyfed, Wales.
EM gng@aber.ac.uk
RI HENNET, Louis/C-1711-2008; Cox, Simon/F-5280-2012;
OI HENNET, Louis/0000-0002-2992-4800; Cox, Simon/0000-0001-6129-3394;
Benmore, Chris/0000-0001-7007-7749
FU Higher Education Funding Council in Wales; Centre for Advanced
Functional Materials and Devices
FX We thank W. Bras, P. McMillan, and P. Poole for very Useful discussions;
the Science Technology Facilities Council and staff at the Synchrotron
Radiation Source for access to the SAXS/WAXS facilities on station 6.2;
and the Advanced Photon Source for access to high-energy x-ray
scattering facilities on 11-ID-C. We also acknowledge the support of the
Higher Education Funding Council in Wales through the Centre for
Advanced Functional Materials and Devices.
NR 32
TC 109
Z9 111
U1 8
U2 71
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 OCT 24
PY 2008
VL 322
IS 5901
BP 566
EP 570
DI 10.1126/science.1160766
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 363WV
UT WOS:000260299100037
PM 18948535
ER
PT J
AU Taylor, MP
Readey, DW
van Hest, MFAM
Teplin, CW
Alleman, JL
Dabney, MS
Gedvilas, LM
Keyes, BM
To, B
Perkins, JD
Ginley, DS
AF Taylor, Matthew P.
Readey, Dennis W.
van Hest, Maikel F. A. M.
Teplin, Charles W.
Alleman, Jeff L.
Dabney, Matthew S.
Gedvilas, Lynn M.
Keyes, Brian M.
To, Bobby
Perkins, John D.
Ginley, David S.
TI The Remarkable Thermal Stability of Amorphous In-Zn-O Transparent
Conductors
SO ADVANCED FUNCTIONAL MATERIALS
LA English
DT Article
ID INDIUM-TIN-OXIDE; IN2O3-ZNO THIN-FILMS; OPTICAL-PROPERTIES;
PHYSICAL-PROPERTIES; TRANSPORT-PROPERTIES; CRYSTALLIZATION;
SEMICONDUCTORS; PARAMETERS; DEPOSITION; SYSTEM
AB Transparent conducting oxides (TCOs) are increasingly critical components in photovoltaic cells, low-a windows, flat panel displays, electrochromic devices, and flexible electronics. The conventional TCOs, such as Sn-doped In2O3, are crystalline single phase materials. Here, we report on In-Zn-O (IZO), a compositionally tunable amorphous TCO with some significantly improved properties. Compositionally graded thin film samples were deposited by co-sputtering from separate In2O3 and ZnO targets onto glass substrates at 100 C. For the metals composition range of 55-84 cation% indium, the as-deposited IZO thin films are amorphous, smooth (R-RMS < 0.4 nm), conductive (sigma 3000 Omega(-1) . cm(-1)), and transparent in the visible (T-Vis > 90%). Furthermore, the amorphous IZO thin films demonstrate remarkable functional and structural stability with respect to heating up to 600 degrees C in either air or argon. Hence, though not completely understood at present, these amorphous materials constitute a new class of fundamentally interesting and technologically important high performance transparent conductors.
C1 [van Hest, Maikel F. A. M.; Teplin, Charles W.; Alleman, Jeff L.; Dabney, Matthew S.; Gedvilas, Lynn M.; Keyes, Brian M.; To, Bobby; Perkins, John D.; Ginley, David S.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Taylor, MP (reprint author), Colorado Sch Mines, Golden, CO 80401 USA.
EM john_perkins@nrel.gov
NR 48
TC 91
Z9 92
U1 11
U2 91
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 OCT 23
PY 2008
VL 18
IS 20
BP 3169
EP 3178
DI 10.1002/adfm.200700604
PG 10
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 369PV
UT WOS:000260707300008
ER
PT J
AU Coe, JD
Sewell, TD
Shaw, MS
Kober, EM
AF Coe, Joshua D.
Sewell, Thomas D.
Shaw, M. Sam
Kober, Edward M.
TI A quantum chemical method for calculating vibrational line shifts in
diatomic fluids
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID STOKES-RAMAN SCATTERING; DENSE MOLECULAR FLUIDS; EQUATION-OF-STATE;
SOLID NITROGEN; HIGH-PRESSURES; FREQUENCY-SHIFTS; HIGH-TEMPERATURE;
SPECTROSCOPY; HYDROGEN; N-2
AB We introduce a simple procedure for generating spectral line shifts in diatomic fluids as a function of pressure. From O(100) configurations (of 100 N-2 molecules) sampled in an isothermal-isobaric ensemble, forces computed with density functional theory are used to generate force-displacement correlations at a series of fluid densities. The curves are fitted with second-degree polynomials, and the resulting coefficients are related to fundamental frequencies and anharmonicities through a truncated expansion of the Morse potential. Comparison to coherent anti-Stokes Raman data reveals satisfactory agreement for line shifts as a function of pressure. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Coe, Joshua D.; Sewell, Thomas D.; Shaw, M. Sam; Kober, Edward M.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Coe, JD (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663,MS B214, Los Alamos, NM 87545 USA.
EM coe.joshua@gmail.com
FU Los Alamos National Laboratory (LANL); National Nuclear Security
Administration (NNSA); Advanced Strategic Computing Program (HE-ASC).;
LANL Laboratory Directed Research and Development (LDRD) Program; Los
Alamos National Security L.L.C; NNSA; United States Department of Energy
[AC52-06NA25396]
FX The authors thank Dave Moore for helpful comments on the manuscript.
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. and E. M. K are supported by the LANL High
Explosives Project of the National Nuclear Security Administration
(NNSA) Advanced Strategic Computing Program (HE-ASC). T.D.S. is
supported by the LANL Laboratory Directed Research and Development
(LDRD) Program. LANL is operated by Los Alamos National Security L.L.C.
under the auspices of the NNSA and the United States Department of
Energy, under Contract No. DE-AC52-06NA25396.
NR 45
TC 1
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U1 0
U2 2
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 OCT 23
PY 2008
VL 464
IS 4-6
BP 265
EP 270
DI 10.1016/j.cplett.2008.09.028
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 363HS
UT WOS:000260259000028
ER
PT J
AU Shelton, DJ
Cleary, JW
Ginn, JC
Wadsworth, SL
Peale, RE
Kotter, DK
Boreman, GD
AF Shelton, D. J.
Cleary, J. W.
Ginn, J. C.
Wadsworth, S. L.
Peale, R. E.
Kotter, D. K.
Boreman, G. D.
TI Gangbuster frequency selective surface metamaterials in terahertz band
SO ELECTRONICS LETTERS
LA English
DT Article
ID FABRICATION
AB Frequency selective surfaces using Ag dipole antenna elements have been simulated, fabricated and tested to demonstrate improved narrowband transmission compared to the current state of the art in the 1 - 2 THz. Several designs are presented including variations in dipole packing density, and sensitivity to a cladding layer. The sharpest resonant response was measured to have a bandwidth of 90 GHz at a centre frequency of 1.3 THz, for a Q of 14.5, which is the highest thus far reported for a terahertz narrowband filter. In addition, the sensitivity of the resonance of the structures to material properties may be exploited as a way to measure the permittivity and loss tangent of thin films in the terahertz band.
C1 [Shelton, D. J.; Cleary, J. W.; Ginn, J. C.; Wadsworth, S. L.; Peale, R. E.; Boreman, G. D.] Univ Cent Florida, Orlando, FL 32816 USA.
[Kotter, D. K.] Idaho Natl Labs, Idaho Falls, ID 83415 USA.
RP Shelton, DJ (reprint author), Univ Cent Florida, 4000 Cent Florida Blvd, Orlando, FL 32816 USA.
EM dshelton@creol.ucf.edu
RI zhou, hang/H-3387-2011
NR 6
TC 6
Z9 6
U1 0
U2 7
PU INST ENGINEERING TECHNOLOGY-IET
PI HERTFORD
PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND
SN 0013-5194
J9 ELECTRON LETT
JI Electron. Lett.
PD OCT 23
PY 2008
VL 44
IS 22
BP 1288
EP U5
DI 10.1049/el:20082119
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA 366HR
UT WOS:000260471900003
ER
PT J
AU Zhong, L
Oostrom, M
Wietsma, TW
Covert, MA
AF Zhong, L.
Oostrom, M.
Wietsma, T. W.
Covert, M. A.
TI Enhanced remedial amendment delivery through fluid viscosity
modifications: Experiments and numerical simulations
SO JOURNAL OF CONTAMINANT HYDROLOGY
LA English
DT Article
DE Remedial amendment; Enhanced delivery; Enhanced sweeping; Heterogeneous
aquifer; Shear thinning; Numerical model
ID NONAQUEOUS PHASE LIQUID; VARIABLE-DENSITY FLOW; POROUS-MEDIA;
MOBILIZATION; MIGRATION; RECOVERY; SAND; SOLUBILIZATION; GROUNDWATER;
AQUIFER
AB Low-permeability zones are typically bypassed when remedial fluids are injected into subsurface heterogeneous aquifer systems. Therefore, contaminants in the bypassed areas may not be contacted by the amendments in the remedial fluid, which may significantly prolong remediation operations. Laboratory experiments and numerical studies have been conducted to investigate the use of a shear-thinning polymer (Xanthan gum) to improve access to low-permeability zones in heterogeneous systems. The chemicals sodium mono-phosphate and the surfactant MA-80 were used as the remedial amendments. The impact of polymer concentration, fluid injection rate, and permeability contrast in the heterogeneous systems has been studied in a series of eleven two-dimensional flow cell experiments. The Subsurface Transport over Multiple Phases (STOMP) simulator was modified to include polymer-induced shear-thinning effects. The experimental and simulation results clearly show that using the polymer leads to an enhanced delivery of remedial amendments to lower-permeability zones and an increased sweeping efficiency. An added benefit of using the polymer is the stabilization of the displacing front when density differences exist between displaced and displacing fluids. The modified STOMP simulator was able to predict the experimental observed fluid displacing behavior well and might be used to predict subsurface remediation performance when a shear-thinning fluid is used to remediate a heterogeneous system at larger scales. Published by Elsevier B.V.
C1 [Zhong, L.; Oostrom, M.] Pacific NW Natl Lab, Energy & Environm Directorate, Richland, WA 99354 USA.
[Wietsma, T. W.; Covert, M. A.] Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99354 USA.
RP Zhong, L (reprint author), Pacific NW Natl Lab, Energy & Environm Directorate, POB 999, Richland, WA 99354 USA.
EM lirong.zhong@pnl.gov
FU Pacific Northwest National Laboratory (PNNL)
FX This study was performed under support provided by Pacific Northwest
National Laboratory (PNNL) through the Laboratory Directed Research and
Development (LDRD) program. PNNL is operated by the Battelle Memorial
Institute for the Department of Energy (DOE) under Contract
DE-AC06-76RLO 1830. The intermediate-scale experiments were performed in
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 PNNL. Scientists interested in
conducting experimental work in the EMSL are encouraged to contact M.
Oostrom (mart.oostrom@pnl.gov).
NR 46
TC 24
Z9 26
U1 0
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-7722
J9 J CONTAM HYDROL
JI J. Contam. Hydrol.
PD OCT 23
PY 2008
VL 101
IS 1-4
BP 29
EP 41
DI 10.1016/j.jconhyd.2008.07.007
PG 13
WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources
SC Environmental Sciences & Ecology; Geology; Water Resources
GA 369AU
UT WOS:000260665800003
PM 18786743
ER
PT J
AU Hay, MB
Myneni, SCB
AF Hay, Michael B.
Myneni, Satish C. B.
TI Geometric and Electronic Structure of the Aqueous Al(H2O)(6)(3+) Complex
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID AL K-EDGE; RAY-ABSORPTION SPECTROSCOPY; 2ND-SHELL WATER-MOLECULES; AL-27
MAS NMR; AB-INITIO; ALZHEIMERS-DISEASE; THEORETICAL-ANALYSIS; XANES
SPECTRA; ALUMINUM; DENSITY
AB The bonding environment of the aqueous Al(H2O)(6)(3+) complex was Studied using X-ray absorption near-edge structure (XANES) spectroscopy at the Al K-edge, with spectral interpretations based on density functional theory (DFT). Calculations for a highly symmetric complex (T-h symmetry) indicate electron transitions into Al 3p-O 2s and Al 3 p-O 2p antibonding orbitals, with a split O 2p contribution that appears to be due to a weak pi-interaction of the Al 3p orbitals with water ligands off-axis (equatorial) with respect to the At 3p axis. Calculations were performed with several hypothetical structures to assess the effects of Al-O bond length, orientation of water ligands in the first coordination shell, and the presence of a second solvation shell on the XANES spectrum. Similar transitions were observed in all of these cases, but with further splitting on addition of 12 solvation waters, inward tilting and random twisting of the water ligands, and nonuniform Al-O bond lengths. Although it was previously hypothesized that the broadness of the XANES spectrum for this complex is due to an asymmetric geometry, these results illustrate how an Al(H2O)(6)(3+) geometry that is octahedral (O-h) with respect to the Al-O-6 core could produce the broad spectrum observed. Because geometric distortions would affect relative Al-O bond strengths, an understanding of the equilibrium Al(H2O)(6)(3+) geometry is prerequisite to a quantitative description of reaction chemistry, including acidity and ligand exchange.
C1 [Hay, Michael B.] Princeton Univ, Dept Civil & Environm Engn, Princeton, NJ 08544 USA.
[Myneni, Satish C. B.] Princeton Univ, Dept Geosci, Princeton, NJ 08544 USA.
[Myneni, Satish C. B.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Hay, MB (reprint author), Princeton Univ, Dept Civil & Environm Engn, Princeton, NJ 08544 USA.
EM mbhay@usgs.gov
FU NSF (Chemical Sciences-EMSI program); BES DOE (Geosciences); EPA STAR;
NSF graduate research fellowships; Director, Office of Science, Office
of Basic Energy Sciences, of the U.S. Department of Energy
[DE-AC02-05CH11231]
FX This project was supported by grants from NSF (Chemical Sciences-EMSI
program) and from the BES DOE (Geosciences). M.B.H. also acknowledges
financial support from the EPA STAR and NSF graduate research
fellowships. 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-AC02-05CH11231. We thank
Tolek Tyliszczak, Hendrik Bluhm, Mary Gilles, and David Shuh at Beamline
11.0.2, Advanced Light Source, for assistance with experimental design
and setup. We also thank Kate Campbell and two anonymous reviewers for
helpful comments on the manuscript.
NR 66
TC 15
Z9 15
U1 5
U2 24
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 OCT 23
PY 2008
VL 112
IS 42
BP 10595
EP 10603
DI 10.1021/jp802675v
PG 9
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 361AV
UT WOS:000260100800021
PM 18826294
ER
PT J
AU Ginovska, B
Camaioni, DM
Dupuis, M
Schwerdtfeger, CA
Gil, Q
AF Ginovska, Bojana
Camaioni, Donald M.
Dupuis, Michel
Schwerdtfeger, Christine A.
Gil, Quinn
TI Charge-Dependent Cavity Radii for an Accurate Dielectric Continuum Model
of Solvation with Emphasis on Ions: Aqueous Solutes with Oxo, Hydroxo,
Amino, Methyl, Chloro, Bromo, and Fluoro Functionalities
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID BOND-DISSOCIATION ENERGIES; GAS-PHASE; WATER CLUSTERS; BASIS-SETS;
SOLVENT; GLYCINE; MOLECULES; HYDRATION; ENTHALPY; VALUES
AB Dielectric continuum solvation models are widely used because they are a computationally efficacious way to simulate equilibrium properties of solutes. With advances that allow for molecular-shaped cavities, they have reached a high level of accuracy, in particular for neutral solutes. However, benchmark tests show that existing schemes for defining cavities are unable to consistently predict accurately the effects of solvation on ions, especially anions. This work involves the further development of a protocol put forth earlier for defining the cavities of aqueous solutes, with resulting advances that are most striking for anions. Molecular cavities are defined as interlocked spheres around atoms or groups of atoms in the solute, but the sphere radii are determined by simple empirically based expressions involving the effective atomic charges of the solute atoms (derived from molecular electrostatic potential) and base radii. Both of these terms are optimized for the different types of atoms or functional groups in a training set of neutral and charged Solutes. Parameters in these expressions for radii were fitted by minimizing residuals between calculated and measured standard free energies of solvation (Delta G(s)(*)), weighted by the uncertainty in the measured value. The calculations were performed using density functional theory with the B3LYP functional and the 6-311+G** basis set and the COnductor-like Screening MOdel (COSMO). The optimized radii definitions reproduce Delta G(s)(*) of neutral solutes and singly charged ions in the training set to within experimental uncertainty and, more importantly, accurately predict Delta G(s)(*) of compounds outside the training set. in particular anions (J. Phys. Chem. A 2003, 107, 5778). Inherent to this approach, the cavity definitions reflect the strength of specific solute-water interactions. We surmise that this feature underlies the success of the model, referred to as the CD-COSMO model for Charge-Dependent (also Camaioni-Dupuis) COSMO model. These findings offer encouragement that we can keep extending this scheme to other functional groups and obtain better accuracy in using continuum solvation models to predict equilibrium properties of aqueous ionic solutes. The approach is illustrated for a number of test cases, including the determination of acidities of an amine base, a study of the tautomerization equilibrium of a zwitterionic molecule (glycine), and calculating solvation energies of transition states toward a full characterization of reaction pathways in aqueous phase, here in S(N)2 exchange reactions. The calculated reaction barriers in aqueous solution are in excellent agreement with experimental values.
C1 [Ginovska, Bojana; Camaioni, Donald M.; Dupuis, Michel; Schwerdtfeger, Christine A.; Gil, Quinn] Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA.
RP Camaioni, DM (reprint author), Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA.
FU U.S. Department of Energy (DOE); Office of Science's Science
Undergraduate Laboratory Internship (SULI) program; Environmental and
Biological Sciences' Environmental Research Sciences Program; DOE's
Office of Basic Energy Sciences; Condensed Phase and Interfacial
Molecular Science program; Battelle Memorial Institute for the U.S.
Department of Energy
FX This research was conducted at the Pacific Northwest National Laboratory
(PNNL). C.A.S. and Q.G. acknowledge support by the U.S. Department of
Energy (DOE), Office of Science's Science Undergraduate Laboratory
Internship (SULI) program. D.M.C. acknowledges support from the Office
of Environmental and Biological Sciences' Environmental Research
Sciences Program. B.G. and M.D. were supported by the DOE's Office of
Basic Energy Sciences, Condensed Phase and Interfacial Molecular Science
program. PNNL is operated by Battelle Memorial Institute for the U.S.
Department of Energy.
NR 63
TC 19
Z9 19
U1 0
U2 10
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 OCT 23
PY 2008
VL 112
IS 42
BP 10604
EP 10613
DI 10.1021/jp804092v
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 361AV
UT WOS:000260100800022
PM 18816107
ER
PT J
AU Zorn, D
Lin, VSY
Pruski, M
Gordon, MS
AF Zorn, Deborah
Lin, Victor S. -Y.
Pruski, Marek
Gordon, Mark S.
TI Comparison of Nitroaldol Reaction Mechanisms Using Accurate Ab Initio
Calculations
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID BASIS-SETS; ALGORITHMS; SILICA; SYSTEM; PATHS
AB In the nitroaldol reaction, condensation between a nitroalkane and an aldehyde yields a nitroalcohol that can undergo dehydration to yield a nitroalkene. Amine-functionalized. MCM-41-type mesoporous silica nanosphere (MSN) materials have been shown to selectively catalyze this reaction. Gas-phase reaction paths for the several competing mechanisms for the nitroaldol reaction have been mapped out using second-order perturbation theory (MP2). Improved relative energies were determined using singles and doubles coupled cluster theory with perturbative triples, CCSD(T). The mechanism in the absence of a catalyst was used to provide a baseline against which to assess the impact of the catalyst on both the mechanism and the related energetics. Catalyzed mechanisms can either pass through a nitroalcohol intermediate as in the classical mechanism or an imine intermediate.
C1 [Gordon, Mark S.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
Iowa State Univ, Dept Chem, Ames, IA 50011 USA.
RP Gordon, MS (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
FU U.S. Department of Energy to the Ames Laboratory; office of BES
[DE-AC02-07CH11358]
FX This research was supported by a Grant front the U.S. Department of
Energy to the Ames Laboratory, office of BES, under contract
DE-AC02-07CH11358.
NR 28
TC 7
Z9 7
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 OCT 23
PY 2008
VL 112
IS 42
BP 10635
EP 10649
DI 10.1021/jp805135p
PG 15
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 361AV
UT WOS:000260100800025
PM 18823100
ER
PT J
AU Velizhanin, KA
Kilina, S
Sewell, TD
Piryatinski, A
AF Velizhanin, Kirill A.
Kilina, Svetlana
Sewell, Thomas D.
Piryatinski, Andrei
TI First-Principles-Based Calculations of Vibrational Normal Modes in
Polyatomic Materials with Translational Symmetry: Application to PETN
Molecular Crystal
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID INELASTIC NEUTRON-SCATTERING; TETRANITRATE SINGLE-CRYSTALS;
DENSITY-FUNCTIONAL THEORY; INITIO PHONON DYNAMICS; AUGMENTED-WAVE
METHOD; DER-WAALS FORCES; AB-INITIO; PENTAERYTHRITOL TETRANITRATE;
SPECTROSCOPY; PSEUDOPOTENTIALS
AB Numerical studies of vibrational energy transport and associated (non)linear infrared and Raman response in polyatomic materials require knowledge of the Multidimensional vibrational potential-energy surface and the ability to perform normal-mode analysis oil that potential. The presence of translational symmetry, as in crystals, leads to the observed dispersion of the unit cell normal modes and has to be accounted for in calculations of energy transfer rates and other spectroscopic quantities. Here we report on the implementation of a computational approach that combines the generalized supercell method and density functional theory electronic structure calculations to investigate the vibrational structure in translationally symmetric materials containing relatively large numbers of atoms in the unit cell (58 atoms in the present study). The method is applied to calculate the phonon and vibron dispersion relations and the vibrational density of states in pentaerythritol tetranitrate (PETN) molecular crystal which is all important energetic material. The results set the stage for future investigations of vibrational energy transport and associated nonlinear spectroscopic signatures in this class of materials.
C1 [Velizhanin, Kirill A.; Kilina, Svetlana; Sewell, Thomas D.; Piryatinski, Andrei] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
[Velizhanin, Kirill A.; Kilina, Svetlana; Sewell, Thomas D.; Piryatinski, Andrei] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Velizhanin, Kirill A.] New Mexico State Univ, Dept Chem & Biochem, Las Cruces, NM 88003 USA.
RP Piryatinski, A (reprint author), Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
EM swellt@missouri.edu; apiryat@lanl.gov
RI Velizhanin, Kirill/C-4835-2008; Piryatinski, Andrei/B-5543-2009
FU National Nuclear Security Administration of the U.S. Department of
Energy at Los Alamos National Laboratory [DE-AC52-06NA25396,
W-7405-ENG-36]; Los Alamos Center for Nonlinear Studies (CNLS)
FX This research was carried out under the auspices of the National Nuclear
Security Administration of the U.S. Department of Energy at Los Alamos
National Laboratory under Contract No. DE-AC52-06NA25396. K.A.V., S.K.,
and A.P. are supported by the LDRD programn of the U.S. Department of
Energy under Contract W-7405-ENG-36 and by the Los Alamos Center for
Nonlinear Studies (CNLS). T.D.S. acknowledges support by the U.S. Office
of Naval Research. We thank Marc J. Cawkwell, Sergei Tretiak, Von H.
Whitley' and Haobin Wang for valuable discussions and suggestions.
NR 42
TC 15
Z9 16
U1 1
U2 8
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 OCT 23
PY 2008
VL 112
IS 42
BP 13252
EP 13257
DI 10.1021/jp804980a
PG 6
WC Chemistry, Physical
SC Chemistry
GA 361AW
UT WOS:000260100900015
PM 18821785
ER
PT J
AU Mo, Y
Lee, BK
Ankner, JF
Becker, JM
Heller, WT
AF Mo, Yiming
Lee, Byung-Kwon
Ankner, John F.
Becker, Jeffrey M.
Heller, William T.
TI Detergent-Associated Solution Conformations of Helical and beta-Barrel
Membrane Proteins
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID X-RAY-SCATTERING; SMALL-ANGLE SCATTERING; HARVESTING COMPLEX LH2;
CIRCULAR-DICHROISM SPECTRA; COUPLED RECEPTOR;
RHODOPSEUDOMONAS-ACIDOPHILA; ANGSTROM RESOLUTION; SECONDARY STRUCTURE;
NEUTRON-SCATTERING; CRYSTAL-STRUCTURE
AB Membrane proteins present major challenges for structural biology. In particular, the production of suitable crystals for high-resolution structural determination continues to be a significant roadblock for developing an atomic-level understanding of these vital cellular systems. The use of detergents for extracting membrane proteins from the native membrane for either crystallization or reconstitution into model lipid membranes for further study is assumed to leave the protein with the proper fold with a belt of detergent encompassing the membrane-spanning segments of the structure. Small-angle X-ray scattering was used to probe the detergent-associated solution conformations of three membrane proteins, namely bacteriorhodopsin (BR), the Ste2p G-protein coupled receptor from Saccharomyces cerevisiae, and the Escherichia coli porin OmpF. The results demonstrate that, contrary to the traditional model of a detergent-associated membrane protein, the helical proteins BR and Ste2p are not in the expected, compact conformation and associated with detergent micelles, while the beta-barrel OmpF is indeed embedded in a disk-like micelle in a properly folded state. The comparisonprovided by the BR and Ste2p, both members of the 7TM family of helical membrane proteins, further suggests that the interhelical interactions between the transmembrane helices of the two proteins differ, such that BR, like other rhodopsins, can properly refold to crystallize, while Ste2p continues to prove resistant to crystallization from an initially detergent-associated state.
C1 [Lee, Byung-Kwon; Becker, Jeffrey M.] Univ Tennessee, Dept Microbiol, Knoxville, TN 37996 USA.
[Mo, Yiming; Heller, William T.] Oak Ridge Natl Lab, Ctr Struct mol Biol, Oak Ridge, TN 37831 USA.
[Mo, Yiming; Heller, William T.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
[Ankner, John F.] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
RP Becker, JM (reprint author), Univ Tennessee, Dept Microbiol, Knoxville, TN 37996 USA.
EM jbecker@utk.edu; hellerwt@ornl.gov
OI Ankner, John/0000-0002-6737-5718
FU Laboratory Directed Research and Development Program; U.S. Department of
Energy [DE-AC05-00OR22725]; National Institute of General Medical
Sciences [NIH GM022087]
FX The authors would like to thanks Dr. Anne H. Delcour of the University
of Houston for the generous gift of the OmpF clone. This work was
supported by the Laboratory Directed Research and Development Program of
Oak Ridge National Laboratory, managed and operated by UT-Battelle, LLC,
for the U.S. Department of Energy under Contract No. DE-AC05-00OR22725,
the Joint Directed Laboratory Development Program from the University of
Tennessee, and NIH GM022087 from the National Institute of General
Medical Sciences.
NR 42
TC 9
Z9 9
U1 1
U2 10
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 OCT 23
PY 2008
VL 112
IS 42
BP 13349
EP 13354
DI 10.1021/jp801266r
PG 6
WC Chemistry, Physical
SC Chemistry
GA 361AW
UT WOS:000260100900027
PM 18816091
ER
PT J
AU Cheng, YC
Ahn, TK
Avenson, TJ
Zigmantas, D
Niyogi, KK
Ballottari, M
Bassi, R
Fleming, GR
AF Cheng, Yuan-Chung
Ahn, Tae Kyu
Avenson, Thomas J.
Zigmantas, Donatas
Niyogi, Krishna K.
Ballottari, Matteo
Bassi, Roberto
Fleming, Graham R.
TI Kinetic Modeling of Charge-Transfer Quenching in the CP29 Minor Complex
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID LIGHT-HARVESTING COMPLEX; PHOTOSYSTEM-II COMPLEX; PLANT ANTENNA PROTEIN;
ENERGY-TRANSFER; GREEN PLANTS; CHLOROPHYLL FLUORESCENCE; CATION
FORMATION; EXCITED-STATES; LHCII COMPLEX; PEAK SHIFT
AB We performed transient absorption (TA) measurements on CP29 minor light-harvesting complexes that were reconstituted in vitro with either violaxanthin (Vio) or zeaxanthin (Zea) and demonstrate that the Zea-bound CP29 complexes exhibit charge-transfer (CT) quenching that has been correlated with the energy-dependent quenching (qE) in higher plants. Simulations of the difference TA kinetics reveal two-phase kinetics for intracomplex energy transfer to the CT quenching site in CP29 complexes, with a fast <500 fs component and a similar to 6 ps component. Specific chlorophyll sites within CP29 are identified as likely locations for CT quenching. We also construct a kinetic model for CT quenching during qE in an intact system that incorporates CP29 as a CT trap and show that the model is consistent with previous in vivo measurements on spinach thylakoid membranes. Finally, we compare simulations of CT quenching in thylakoids with those of the individual CP29 complexes and propose that CP29 rather than LHCII is a site of CT quenching.
C1 [Cheng, Yuan-Chung; Ahn, Tae Kyu; Zigmantas, Donatas; Niyogi, Krishna K.; Fleming, Graham R.] Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
[Cheng, Yuan-Chung; Ahn, Tae Kyu; Avenson, Thomas J.; Zigmantas, Donatas; Fleming, Graham R.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Avenson, Thomas J.; Niyogi, Krishna K.] Univ Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720 USA.
[Ballottari, Matteo; Bassi, Roberto] Univ Verona, Dept Sci & Technol, I-37134 Verona, Italy.
RP Fleming, GR (reprint author), Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
EM GRFleming@lbl.gov
RI Cheng, Yuan-Chung/A-6566-2008; Ahn, Tae/A-5838-2013; Zigmantas,
Donatas/E-5541-2014;
OI Cheng, Yuan-Chung/0000-0003-0125-4267; Zigmantas,
Donatas/0000-0003-2007-5256; Ballottari, Matteo/0000-0001-8410-3397;
bassi, roberto/0000-0002-4140-8446
FU U.S. Department of Energy [DE-AC02-05C-H11231, DE-AC03-76SF000098];
Korean Government [KRF-2006-214-C00037]; National Research Initiative
Competitive [2006-03279]; Italian Basic Research Foundation [RBLA0345SF]
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
DE-AC02-05C-H11231 and by the Chemical Sciences. Geosciences and
Biosciences Division, Office of Basic Energy Sciences, U.S. Department
of Energy, under Contract DE-AC03-76SF000098 (G.R.F. and K.K.N), the
Korea Research Foundation Grant (KRF-2006-214-C00037) funded by the
Korean Government (MOEHRD) (T.K.A.), and the National Research
Initiative Competitive Grant (2006-03279) (T.J.A). R.B. extends thanks
to the FIRB Contract RBLA0345SF from the Italian Basic Research
Foundation and contract SAMBA Trento Research Council for foundational
support.
NR 43
TC 16
Z9 16
U1 0
U2 6
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 OCT 23
PY 2008
VL 112
IS 42
BP 13418
EP 13423
DI 10.1021/jp802730c
PG 6
WC Chemistry, Physical
SC Chemistry
GA 361AW
UT WOS:000260100900035
PM 18826191
ER
PT J
AU Chin, L
Meyerson, M
Aldape, K
Bigner, D
Mikkelsen, T
VandenBerg, S
Kahn, A
Penny, R
Ferguson, ML
Gerhard, DS
Getz, G
Brennan, C
Taylor, BS
Winckler, W
Park, P
Ladanyi, M
Hoadley, KA
Verhaak, RGW
Hayes, DN
Spellman, PT
Absher, D
Weir, BA
Ding, L
Wheeler, D
Lawrence, MS
Cibulskis, K
Mardis, E
Zhang, JH
Wilson, RK
Donehower, L
Wheeler, DA
Purdom, E
Wallis, J
Laird, PW
Herman, JG
Schuebel, KE
Weisenberger, DJ
Baylin, SB
Schultz, N
Yao, J
Wiedemeyer, R
Weinstein, J
Sander, C
Gibbs, RA
Gray, J
Kucherlapati, R
Lander, ES
Myers, RM
Perou, CM
McLendon, R
Friedman, A
Van Meir, EG
Brat, DJ
Mastrogianakis, GM
Olson, JJ
Lehman, N
Yung, WKA
Bogler, O
Berger, M
Prados, M
Muzny, D
Morgan, M
Scherer, S
Sabo, A
Nazareth, L
Lewis, L
Hall, O
Zhu, YM
Ren, YR
Alvi, O
Yao, JQ
Hawes, A
Jhangiani, S
Fowler, G
San Lucas, A
Kovar, C
Cree, A
Dinh, H
Santibanez, J
Joshi, V
Gonzalez-Garay, ML
Miller, CA
Milosavljevic, A
Sougnez, C
Fennell, T
Mahan, S
Wilkinson, J
Ziaugra, L
Onofrio, R
Bloom, T
Nicol, R
Ardlie, K
Baldwin, J
Gabriel, S
Fulton, RS
McLellan, MD
Larson, DE
Shi, XQ
Abbott, R
Fulton, L
Chen, K
Koboldt, DC
Wendl, MC
Meyer, R
Tang, YZ
Lin, L
Osborne, JR
Dunford-Shore, BH
Miner, TL
Delehaunty, K
Markovic, C
Swift, G
Courtney, W
Pohl, C
Abbott, S
Hawkins, A
Leong, S
Haipek, C
Schmidt, H
Wiechert, M
Vickery, T
Scott, S
Dooling, DJ
Chinwalla, A
Weinstock, GM
O'Kelly, M
Robinson, J
Alexe, G
Beroukhim, R
Carter, S
Chiang, D
Gould, J
Gupta, S
Korn, J
Mermel, C
Mesirov, J
Monti, S
Nguyen, H
Parkin, M
Reich, M
Stransky, N
Garraway, L
Golub, T
Protopopov, A
Perna, I
Aronson, S
Sathiamoorthy, N
Ren, G
Kim, H
Kong, SK
Xiao, YH
Kohane, IS
Seidman, J
Cope, L
Pan, F
Van Den Berg, D
Van Neste, L
Yi, JM
Li, JZ
Southwick, A
Brady, S
Aggarwal, A
Chung, T
Sherlock, G
Brooks, JD
Jakkula, LR
Lapuk, AV
Marr, H
Dorton, S
Choi, YG
Han, J
Ray, A
Wang, V
Durinck, S
Robinson, M
Wang, NJ
Vranizan, K
Peng, V
Van Name, E
Fontenay, GV
Ngai, J
Conboy, JG
Parvin, B
Feiler, HS
Speed, TP
Socci, ND
Olshen, A
Lash, A
Reva, B
Antipin, Y
Stukalov, A
Gross, B
Cerami, E
Wang, WQ
Qin, LX
Seshan, VE
Villafania, L
Cavatore, M
Borsu, L
Viale, A
Gerald, W
Topal, MD
Qi, Y
Balu, S
Shi, Y
Wu, G
Bittner, M
Shelton, T
Lenkiewicz, E
Morris, S
Beasley, D
Sanders, S
Sfeir, R
Chen, J
Nassau, D
Feng, L
Hickey, E
Schaefer, C
Madhavan, S
Buetow, K
Barker, A
Vockley, J
Compton, C
Vaught, J
Fielding, P
Collins, F
Good, P
Guyer, M
Ozenberger, B
Peterson, J
Thomson, E
AF Chin, L.
Meyerson, M.
Aldape, K.
Bigner, D.
Mikkelsen, T.
VandenBerg, S.
Kahn, A.
Penny, R.
Ferguson, M. L.
Gerhard, D. S.
Getz, G.
Brennan, C.
Taylor, B. S.
Winckler, W.
Park, P.
Ladanyi, M.
Hoadley, K. A.
Verhaak, R. G. W.
Hayes, D. N.
Spellman, Paul T.
Absher, D.
Weir, B. A.
Ding, L.
Wheeler, D.
Lawrence, M. S.
Cibulskis, K.
Mardis, E.
Zhang, Jinghui
Wilson, R. K.
Donehower, L.
Wheeler, D. A.
Purdom, E.
Wallis, J.
Laird, P. W.
Herman, J. G.
Schuebel, K. E.
Weisenberger, D. J.
Baylin, S. B.
Schultz, N.
Yao, Jun
Wiedemeyer, R.
Weinstein, J.
Sander, C.
Gibbs, R. A.
Gray, J.
Kucherlapati, R.
Lander, E. S.
Myers, R. M.
Perou, C. M.
McLendon, Roger
Friedman, Allan
Van Meir, Erwin G
Brat, Daniel J
Mastrogianakis, Gena Marie
Olson, Jeffrey J
Lehman, Norman
Yung, W. K. Alfred
Bogler, Oliver
Berger, Mitchel
Prados, Michael
Muzny, Donna
Morgan, Margaret
Scherer, Steve
Sabo, Aniko
Nazareth, Lynn
Lewis, Lora
Hall, Otis
Zhu, Yiming
Ren, Yanru
Alvi, Omar
Yao, Jiqiang
Hawes, Alicia
Jhangiani, Shalini
Fowler, Gerald
San Lucas, Anthony
Kovar, Christie
Cree, Andrew
Dinh, Huyen
Santibanez, Jireh
Joshi, Vandita
Gonzalez-Garay, Manuel L.
Miller, Christopher A.
Milosavljevic, Aleksandar
Sougnez, Carrie
Fennell, Tim
Mahan, Scott
Wilkinson, Jane
Ziaugra, Liuda
Onofrio, Robert
Bloom, Toby
Nicol, Rob
Ardlie, Kristin
Baldwin, Jennifer
Gabriel, Stacey
Fulton, Robert S.
McLellan, Michael D.
Larson, David E.
Shi, Xiaoqi
Abbott, Rachel
Fulton, Lucinda
Chen, Ken
Koboldt, Daniel C.
Wendl, Michael C.
Meyer, Rick
Tang, Yuzhu
Lin, Ling
Osborne, John R.
Dunford-Shore, Brian H.
Miner, Tracie L.
Delehaunty, Kim
Markovic, Chris
Swift, Gary
Courtney, William
Pohl, Craig
Abbott, Scott
Hawkins, Amy
Leong, Shin
Haipek, Carrie
Schmidt, Heather
Wiechert, Maddy
Vickery, Tammi
Scott, Sacha
Dooling, David J.
Chinwalla, Asif
Weinstock, George M.
O'Kelly, Michael
Robinson, Jim
Alexe, Gabriele
Beroukhim, Rameen
Carter, Scott
Chiang, Derek
Gould, Josh
Gupta, Supriya
Korn, Josh
Mermel, Craig
Mesirov, Jill
Monti, Stefano
Nguyen, Huy
Parkin, Melissa
Reich, Michael
Stransky, Nicolas
Garraway, Levi
Golub, Todd
Protopopov, Alexei
Perna, Ilana
Aronson, Sandy
Sathiamoorthy, Narayan
Ren, Georgia
Kim, Hyunsoo
Kong, Sek Won
Xiao, Yonghong
Kohane, Isaac S.
Seidman, Jon
Cope, Leslie
Pan, Fei
Van Den Berg, David
Van Neste, Leander
Yi, Joo Mi
Li, Jun Z.
Southwick, Audrey
Brady, Shannon
Aggarwal, Amita
Chung, Tisha
Sherlock, Gavin
Brooks, James D.
Jakkula, Lakshmi R.
Lapuk, Anna V.
Marr, Henry
Dorton, Shannon
Choi, Yoon Gi
Han, Ju
Ray, Amrita
Wang, Victoria
Durinck, Steffen
Robinson, Mark
Wang, Nicholas J.
Vranizan, Karen
Peng, Vivian
Van Name, Eric
Fontenay, Gerald V.
Ngai, John
Conboy, John G.
Parvin, Bahram
Feiler, Heidi S.
Speed, Terence P.
Socci, Nicholas D.
Olshen, Adam
Lash, Alex
Reva, Boris
Antipin, Yevgeniy
Stukalov, Alexey
Gross, Benjamin
Cerami, Ethan
Wang, Wei Qing
Qin, Li-Xuan
Seshan, Venkatraman E.
Villafania, Liliana
Cavatore, Magali
Borsu, Laetitia
Viale, Agnes
Gerald, William
Topal, Michael D.
Qi, Yuan
Balu, Sai
Shi, Yan
Wu, George
Bittner, Michael
Shelton, Troy
Lenkiewicz, Elizabeth
Morris, Scott
Beasley, Debbie
Sanders, Sheri
Sfeir, Robert
Chen, Jessica
Nassau, David
Feng, Larry
Hickey, Erin
Schaefer, Carl
Madhavan, Subha
Buetow, Ken
Barker, Anna
Vockley, Joseph
Compton, Carolyn
Vaught, Jim
Fielding, Peter
Collins, Francis
Good, Peter
Guyer, Mark
Ozenberger, Brad
Peterson, Jane
Thomson, Elizabeth
CA Canc Genome Atlas Res Network
Tissue Source Sites
Genome Sequencing Ctr
Canc Genome Characterization Ctr
Project Teams
TI Comprehensive genomic characterization defines human glioblastoma genes
and core pathways
SO NATURE
LA English
DT Article
ID NF1 GENE; MISMATCH REPAIR; NEUROFIBROMATOSIS TYPE-1; SOMATIC MUTATIONS;
MALIGNANT GLIOMAS; ALKYLATING-AGENTS; HIGH-FREQUENCY; PIK3CA GENE;
CELL-LINES; TUMORS
AB Human cancer cells typically harbour multiple chromosomal aberrations, nucleotide substitutions and epigenetic modifications that drive malignant transformation. The Cancer Genome Atlas ( TCGA) pilot project aims to assess the value of large- scale multi- dimensional analysis of these molecular characteristics in human cancer and to provide the data rapidly to the research community. Here we report the interim integrative analysis of DNA copy number, gene expression and DNA methylation aberrations in 206 glioblastomas - the most common type of primary adult brain cancer - and nucleotide sequence aberrations in 91 of the 206 glioblastomas. This analysis provides new insights into the roles of ERBB2, NF1 and TP53, uncovers frequent mutations of the phosphatidylinositol- 3- OH kinase regulatory subunit gene PIK3R1, and provides a network view of the pathways altered in the development of glioblastoma. Furthermore, integration of mutation, DNA methylation and clinical treatment data reveals a link between MGMT promoter methylation and a hypermutator phenotype consequent to mismatch repair deficiency in treated glioblastomas, an observation with potential clinical implications. Together, these findings establish the feasibility and power of TCGA, demonstrating that it can rapidly expand knowledge of the molecular basis of cancer.
C1 [Chin, L.; Meyerson, M.; Winckler, W.; Verhaak, R. G. W.; Weir, B. A.; Wiedemeyer, R.; Beroukhim, Rameen; Chiang, Derek; Mermel, Craig; Garraway, Levi] Dana Farber Canc Inst, Dept Med Oncol, Boston, MA 02115 USA.
[Chin, L.; Yao, Jun; Protopopov, Alexei; Perna, Ilana; Ren, Georgia; Xiao, Yonghong] Dana Farber Canc Inst, Ctr Appl Canc Sci, Belfer Inst innovat Canc Sci, Boston, MA 02115 USA.
[Chin, L.; Robinson, Jim; Alexe, Gabriele; Carter, Scott] Harvard Univ, Sch Med, Dept Dermatol, Boston, MA 02115 USA.
[Meyerson, M.; Getz, G.; Winckler, W.; Verhaak, R. G. W.; Weir, B. A.; Lawrence, M. S.; Lander, E. S.; O'Kelly, Michael; Beroukhim, Rameen; Chiang, Derek; Gould, Josh; Gupta, Supriya; Korn, Josh; Mermel, Craig; Mesirov, Jill; Monti, Stefano; Nguyen, Huy; Parkin, Melissa; Reich, Michael; Stransky, Nicolas; Garraway, Levi; Golub, Todd] Harvard Univ, Cambridge, MA 02142 USA.
[Bigner, D.; McLendon, Roger] Duke Univ, Med Ctr, Dept Pathol, Durham, NC 27710 USA.
[Friedman, Allan] Duke Univ, Med Ctr, Dept Surg, Durham, NC 27710 USA.
[Mikkelsen, T.] Henry Ford Hosp, Dept Neurol Surg, Detroit, MI 48202 USA.
[VandenBerg, S.] Univ Calif San Francisco, Dept Pathol, San Francisco, CA 94143 USA.
[Aldape, K.] Univ Texas Houston MD Anderson Canc Ctr, Dept Pathol, Houston, TX 77030 USA.
[Yung, W. K. Alfred] Univ Texas Houston MD Anderson Canc Ctr, Dept Neurooncol, Houston, TX 77030 USA.
[Bogler, Oliver] Univ Texas Houston MD Anderson Canc Ctr, Dept Neurosurg, Houston, TX 77030 USA.
[Kahn, A.; Sfeir, Robert; Chen, Jessica; Nassau, David; Feng, Larry; Hickey, Erin] SRA Int, Fairfax, VA 22033 USA.
NCI, Ctr Biomed Informat & Informat Technol, Rockville, MD 20852 USA.
[Collins, Francis; Good, Peter; Guyer, Mark; Ozenberger, Brad; Peterson, Jane; Thomson, Elizabeth] NIH, Natl Human Genome Res Inst, Bethesda, MD 20892 USA.
[Gerhard, D. S.; Barker, Anna; Vockley, Joseph; Compton, Carolyn; Vaught, Jim; Fielding, Peter] NCI, NIH, Bethesda, MD 20892 USA.
[Penny, R.; Shelton, Troy; Lenkiewicz, Elizabeth; Morris, Scott; Beasley, Debbie; Sanders, Sheri] Int Genom Consortium, Phoenix, AZ 85004 USA.
[Ferguson, M. L.] MLF Consulting, Arlington, MA 02474 USA.
[Ding, L.; Mardis, E.; Wilson, R. K.; Wallis, J.; Fennell, Tim; Baldwin, Jennifer; Fulton, Robert S.; McLellan, Michael D.; Larson, David E.; Shi, Xiaoqi; Abbott, Rachel; Fulton, Lucinda; Chen, Ken; Koboldt, Daniel C.; Wendl, Michael C.; Meyer, Rick; Tang, Yuzhu; Lin, Ling; Osborne, John R.; Dunford-Shore, Brian H.; Miner, Tracie L.; Delehaunty, Kim; Markovic, Chris; Swift, Gary; Courtney, William; Pohl, Craig; Abbott, Scott; Hawkins, Amy; Leong, Shin; Haipek, Carrie; Schmidt, Heather; Wiechert, Maddy; Vickery, Tammi; Scott, Sacha; Dooling, David J.; Chinwalla, Asif; Weinstock, George M.] Washington Univ, Sch Med, Dept Genet, Genome Ctr, St Louis, MO 63108 USA.
Sidney Kimmel Comprehens Canc Ctr Johns Hopkins, Baltimore, MD 21231 USA.
[Park, P.; Aronson, Sandy; Sathiamoorthy, Narayan; Kim, Hyunsoo; Kohane, Isaac S.] Harvard Univ, Sch Med, Partners Healthcare Ctr Genet & Genom, Boston, MA 02115 USA.
[Park, P.; Kucherlapati, R.; Kohane, Isaac S.] Harvard Univ, Sch Med, Ctr Biomed Informat, Boston, MA 02115 USA.
[Park, P.; Kong, Sek Won; Kohane, Isaac S.] Childrens Hosp, Informat Program, Boston, MA 02115 USA.
[Brennan, C.] Mem Sloan Kettering Canc Ctr, Dept Neurosurg, New York, NY 10065 USA.
[Taylor, B. S.; Schultz, N.; Sander, C.; Socci, Nicholas D.; Lash, Alex; Reva, Boris; Antipin, Yevgeniy; Stukalov, Alexey; Gross, Benjamin; Cerami, Ethan; Wang, Wei Qing; Gerald, William] Mem Sloan Kettering Canc Ctr, Computat Biol Ctr, New York, NY 10065 USA.
[Taylor, B. S.] Weill Cornell Grad Sch Med Sci, Dept Physiol & Biophys, New York, NY 10065 USA.
[Ladanyi, M.; Borsu, Laetitia] Mem Sloan Kettering Canc Ctr, Dept Pathol, Human Oncol & Pathogenesis Program, New York, NY 10065 USA.
[Spellman, Paul T.; Gray, J.; Jakkula, Lakshmi R.; Lapuk, Anna V.; Marr, Henry; Dorton, Shannon; Han, Ju; Ray, Amrita; Durinck, Steffen; Wang, Nicholas J.; Fontenay, Gerald V.; Conboy, John G.; Parvin, Bahram; Feiler, Heidi S.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
[Purdom, E.; Wang, Victoria; Speed, Terence P.] Univ Calif Berkeley, Dept Stat, Berkeley, CA 95720 USA.
[Choi, Yoon Gi; Vranizan, Karen; Peng, Vivian; Van Name, Eric; Ngai, John] Univ Calif Berkeley, Dept Mol & Cellular Biol, Berkeley, CA 95720 USA.
[Robinson, Mark; Speed, Terence P.] Walter & Eliza Hall Inst Med Res, Parkville, Vic 3052, Australia.
[Southwick, Audrey; Brady, Shannon; Aggarwal, Amita; Chung, Tisha; Sherlock, Gavin] Stanford Univ, Sch Med, Dept Genet, Stanford, CA 94305 USA.
[Brooks, James D.] Stanford Univ, Sch Med, Dept Urol, Stanford, CA 94305 USA.
[Wheeler, D.; Donehower, L.; Wheeler, D. A.] Baylor Coll Med, Human Genome Sequencing Ctr, Dept Mol Virol & Microbiol, Houston, TX 77030 USA.
[Perou, C. M.; Miller, Christopher A.; Milosavljevic, Aleksandar] Baylor Coll Med, Grad Program Struct & Computat Biol & Mol Biophys, Houston, TX 77030 USA.
[Perou, C. M.; Milosavljevic, Aleksandar] Baylor Coll Med, Dept Mol & Human Genet, Houston, TX 77030 USA.
Univ N Carolina, Dept Genet, Lineberger Comprehens Canc Ctr, Chapel Hill, NC 27599 USA.
[Hoadley, K. A.; Topal, Michael D.] Univ N Carolina, Dept Pathol & Lab Med, Lineberger Comprehens Canc Ctr, Chapel Hill, NC 27599 USA.
[Qi, Yuan] Univ N Carolina, Dept Internal Med, Lineberger Comprehens Canc Ctr, Div Med Oncol, Chapel Hill, NC 27599 USA.
[Hayes, D. N.; Herman, J. G.; Schuebel, K. E.; Baylin, S. B.; Yi, Joo Mi] Johns Hopkins Univ, Div Canc Biol, Sidney Kimmel Comprehens Canc Ctr, Baltimore, MD 21231 USA.
[Cope, Leslie] Johns Hopkins Univ, Biometry & Clin Trials Div, Sidney Kimmel Comprehens Canc Ctr, Baltimore, MD 21231 USA.
[Van Neste, Leander] Univ Ghent, Fac Biosci & Engn, Dept Mol Biotechnol, B-9000 Ghent, Belgium.
[Van Meir, Erwin G; Mastrogianakis, Gena Marie; Olson, Jeffrey J] Emory Univ, Sch Med, Dept Neurosurg, Atlanta, GA 30322 USA.
[Van Meir, Erwin G; Olson, Jeffrey J] Emory Univ, Sch Med, Dept Hematol & Med Oncol, Atlanta, GA 30322 USA.
[Van Meir, Erwin G; Brat, Daniel J; Olson, Jeffrey J] Emory Univ, Sch Med, Winship Canc Inst, Atlanta, GA 30322 USA.
[Brat, Daniel J] Emory Univ, Sch Med, Dept Pathol & Lab Med, Atlanta, GA 30322 USA.
[Laird, P. W.; Weisenberger, D. J.; Pan, Fei; Van Den Berg, David] Univ So Calif, USC Epigenome Ctr, Los Angeles, CA 90089 USA.
[Lehman, Norman] Henry Ford Hosp, Dept Pathol, Detroit, MI 48202 USA.
[Berger, Mitchel; Prados, Michael] Univ Calif San Francisco, Dept Neurosurg, San Francisco, CA 94143 USA.
[Cibulskis, K.; Sougnez, Carrie] MIT, Eli & Edythe L Broad Inst, Canc Genome Project, Cambridge, MA 02142 USA.
[Sougnez, Carrie] MIT, Eli & Edythe L Broad Inst, Med Resequencing Project, Cambridge, MA 02142 USA.
[Lander, E. S.] MIT, Dept Biol, Cambridge, MA 02142 USA.
[Lander, E. S.] Harvard Univ, Dept Syst Biol, Boston, MA 02115 USA.
[Golub, Todd] Dana Farber Canc Inst, Dept Pediat Oncol, Boston, MA 02115 USA.
[Seidman, Jon] Harvard Univ, Sch Med, Dept Genet, Boston, MA 02115 USA.
[Absher, D.; Myers, R. M.] HudsonAlpha Inst Biotechnol, Huntsville, AL 35806 USA.
[Olshen, Adam; Qin, Li-Xuan; Seshan, Venkatraman E.] Mem Sloan Kettering Canc Ctr, Dept Epidemiol & Biostat, New York, NY 10065 USA.
[Villafania, Liliana; Cavatore, Magali; Viale, Agnes] Mem Sloan Kettering Canc Ctr, Genom Core Lab, New York, NY 10065 USA.
[Bittner, Michael] Translat Genom Res Inst, Computat Biol Div, Phoenix, AZ 85004 USA.
[Zhang, Jinghui; Schaefer, Carl; Madhavan, Subha; Buetow, Ken] NCI, Ctr Biomed Informat & Informat Technol, Rockville, MD 20852 USA.
[Weinstein, J.] Univ Texas Houston MD Anderson Canc Ctr, Dept Bioinformat & Computat Biol, Houston, TX 77030 USA.
[Li, Jun Z.] Univ Michigan, Dept Human Genet, Ann Arbor, MI 48109 USA.
[Kong, Sek Won] Childrens Hosp, Dept Cardiol, Boston, MA 02115 USA.
RP Chin, L (reprint author), Dana Farber Canc Inst, Dept Med Oncol, Boston, MA 02115 USA.
EM lynda_chin@dfci.harvard.edu; matthew_meyerson@dfci.harvard.edu
RI Wendl, Michael/A-2741-2008; Speed, Terence /B-8085-2009; leng,
xianwei/F-9073-2011; sander, chris/H-1452-2011; Meyerson,
Matthew/E-7123-2012; Sherlock, Gavin/E-9110-2012; Miller,
Christopher/A-1060-2009; Kohane, Isaac Kohane/K-3716-2012; Robinson,
Mark/A-6432-2015; Laird, Peter/G-8683-2012; Lehman, Norman/A-7351-2015;
Chiang, Daisy/C-9481-2011; Reva, Boris/B-6436-2014;
OI Speed, Terence /0000-0002-5403-7998; Miller,
Christopher/0000-0003-4266-6700; Kohane, Isaac
Kohane/0000-0003-2192-5160; Robinson, Mark/0000-0002-3048-5518; Chiang,
Daisy/0000-0002-8205-4285; Reva, Boris/0000-0002-8805-389X; Van Meir,
Erwin G./0000-0003-2444-7707; Lehman, Norman/0000-0001-8394-2607;
Bogler, Oliver/0000-0002-3700-0480; Brennan,
Cameron/0000-0003-4064-8891; Lash, Alex/0000-0003-3787-1590; Hayes, D.
Neil/0000-0001-6203-7771; Sherlock, Gavin/0000-0002-1692-4983; Perou,
Charles/0000-0001-9827-2247
FU United States National Institutes of Health [U54HG003067, U54HG003079,
U54HG003273, U24CA126543, U24CA126544, U24CA126546, U24CA126551,
U24CA126554, U24CA126561, U24CA126563]
FX We thank the members of TCGA's External Scientific Committee, the
Glioblastoma Disease Working Group (http://
cancergenome.nih.gov/components) and D. N. Louis for discussions; A.
Mirick, J. Melone and C. Collins for administrative coordination of TCGA
activities; and L. Gaffney for graphic art. This work was supported by
the following grants from the United States National Institutes of
Health: U54HG003067, U54HG003079, U54HG003273, U24CA126543, U24CA126544,
U24CA126546, U24CA126551, U24CA126554, U24CA126561 and U24CA126563.
NR 50
TC 2301
Z9 2332
U1 49
U2 315
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
EI 1476-4687
J9 NATURE
JI Nature
PD OCT 23
PY 2008
VL 455
IS 7216
BP 1061
EP 1068
DI 10.1038/nature07385
PG 8
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 363FG
UT WOS:000260252600035
ER
PT J
AU Morton, JJL
Tyryshkin, AM
Brown, RM
Shankar, S
Lovett, BW
Ardavan, A
Schenkel, T
Haller, EE
Ager, JW
Lyon, SA
AF Morton, John J. L.
Tyryshkin, Alexei M.
Brown, Richard M.
Shankar, Shyam
Lovett, Brendon W.
Ardavan, Arzhang
Schenkel, Thomas
Haller, Eugene E.
Ager, Joel W.
Lyon, S. A.
TI Solid-state quantum memory using the (31)P nuclear spin
SO NATURE
LA English
DT Article
ID ULTRAFAST PHASE GATES; ELECTRON SPIN; SILICON; QUBITS; DECOHERENCE;
COHERENCE; COMPUTER
AB The transfer of information between different physical forms - for example processing entities and memory - is a central theme in communication and computation. This is crucial in quantum computation(1), where great effort(2) must be taken to protect the integrity of a fragile quantum bit ( qubit). However, transfer of quantum information is particularly challenging, as the process must remain coherent at all times to preserve the quantum nature of the information(3). Here we demonstrate the coherent transfer of a superposition state in an electron- spin 'processing' qubit to a nuclear- spin 'memory' qubit, using a combination of microwave and radio- frequency pulses applied to (31)P donors in an isotopically pure (28)Si crystal(4,5). The state is left in the nuclear spin on a time-scale that is long compared with the electron decoherence time, and is then coherently transferred back to the electron spin, thus demonstrating the (31)P nuclear spin as a solid-state quantum memory. The overall store - readout fidelity is about 90 per cent, with the loss attributed to imperfect rotations, and can be improved through the use of composite pulses(6). The coherence lifetime of the quantum memory element at 5.5 K exceeds 1 s.
C1 [Morton, John J. L.; Brown, Richard M.; Lovett, Brendon W.] Univ Oxford, Dept Mat, Oxford OX1 3PH, England.
[Morton, John J. L.; Ardavan, Arzhang] Univ Oxford, Dept Phys, Clarendon Lab, CAESR, Oxford OX1 3PU, England.
[Tyryshkin, Alexei M.; Shankar, Shyam; Lyon, S. A.] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA.
[Schenkel, Thomas; Haller, Eugene E.; Ager, Joel W.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Haller, Eugene E.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
RP Morton, JJL (reprint author), Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England.
EM john.morton@materials.ox.ac.uk
RI Morton, John/I-3515-2013; Shankar, Shyam/K-5127-2013;
OI Shankar, Shyam/0000-0002-1311-9508; Ager, Joel/0000-0001-9334-9751
FU National Security Agency [MOD 713106A]; EPSRC [GR/S82176/01]; CAESR
[EP/D048559/1]; St John's College, Oxford; Royal Society; US National
Science Foundation [DMR-0213706]; Office of Science, Office of Basic
Energy Sciences, Materials Sciences and Engineering Division of the US
Department of Energy [DE-AC02-05CH11231]
FX We thank G. A. D. Briggs for comments and support and R. Weber, P. Hofer
and Bruker Biospin for support with instrumentation. We thank P. Weaver
of Advanced Silicon Materials, Inc. for zone- refining and H. Riemann of
the Institut fur Kristallzuchtung for float- zone processing of the
28Si crystals used in this work. This research is supported
by the National Security Agency (MOD 713106A) and the EPSRC through the
Quantum Information Processing Interdisciplinary Research Collaboration
(GR/S82176/01) and CAESR (EP/D048559/1). J.J.L.M. is supported by St
John's College, Oxford. A. A. and B. W. L. are supported by the Royal
Society. Work at Princeton received support from the US National Science
Foundation through the Princeton MRSEC (DMR-0213706). Work at Lawrence
Berkeley National Laboratory was supported by the Director, Office of
Science, Office of Basic Energy Sciences, Materials Sciences and
Engineering Division of the US Department of Energy (DE-AC02-05CH11231).
NR 31
TC 208
Z9 210
U1 4
U2 51
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
J9 NATURE
JI Nature
PD OCT 23
PY 2008
VL 455
IS 7216
BP 1085
EP 1088
DI 10.1038/nature07295
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 363FG
UT WOS:000260252600039
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
Andrie, 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
Banduri, DV
Banerjee, P
Banerjee, S
Barberis, E
Barfuss, AF
Bargassa, P
Baringer, R
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
Biscaratt, 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
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Buchanan, NJ
Buchholz, D
Buehler, M
Buescher, V
Bunichev, V
Burdin, S
Burnett, TH
Buszello, CP
Butler, JM
Calfayan, P
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Carrera, E
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Cheu, E
Chevallie, 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
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Das, A
Davies, G
De, K
Jong, SJ
De la Cruz-Burelo, E
Martins, CDO
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Dyer, J
Dyshkant, A
Eads, M
Edmunds, D
Ellison, J
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Eno, S
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Evdolimov, 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, R
Geist, W
Geng, W
Gerber, CE
Gershtein, Y
Gillberg, D
Ginther, G
Gollub, N
Gomez, B
Goussiou, A
Grannis, PD
Greenlee, H
Greenwood, ZD
Gregores, EM
Grenier, G
Gris, P
Grivaz, JF
Grohsjean, A
Gruenendahl, S
Gruenewald, MW
Guo, F
Guo, J
Gutierrez, G
Gutierrez, R
Haas, A
Hadley, NJ
Haefner, R
Hagopian, S
Haley, J
Hall, I
Hall, RE
Han, L
Harder, K
Harel, A
Hauptman, M
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
Hoeth, H
Hohifeld, M
Hossain, S
Houben, R
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, R
Juste, A
Kajfasz, E
Kalk, JM
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
Kirschu, 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, R
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
Liug, Y
Liu, Z
Lobodenko, A
Lokajicek, M
Love, P
Lubatti, HJ
Luna, R
Lyon, AL
Maciel, AKA
Macki, D
Madaras, RJ
Maettig, R
Magass, C
Magerkurth, A
Mal, PK
Malbouisson, HB
Malik, S
Malyshev, VL
Maravin, Y
Martin, B
McCarthy, R
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, GJO
Owen, M
Padley, P
Pangilinan, M
Parashar, N
Park, SJ
Parkae, 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
Pleie, 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
Rieger, J
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
Scharnberger, 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
Shchulkin, AA
Shivpuri, RK
Siccardi, V
Simak, V
Sirotenko, V
Skubic, P
Slattery, P
Smirnov, D
Snow, GR
Snow, J
Snyder, S
Soeldner-Rembold, S
Sonnenschein, L
Sopczak, A
Sosebee, M
Soustruznik, K
Spurlock, B
Stark, J
Steele, J
Stolin, V
Stoyanova, DA
Strandberg, J
Strandberg, S
Strang, MA
Strauss, E
Strauss, M
Stroehmer, R
Strom, D
Stutte, L
Surnowidagdo, S
Svoisky, P
Sznajder, A
Tamburello, P
Tanasijczuk, A
Taylor, W
Tiller, B
Tissandier, F
Titov, M
Tokmenin, VV
Tschudi, Y
Torchiani, I
Tsybychev, D
Tuchming, B
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
Varelasly, N
Varnes, EW
Vasilyev, IA
Verdier, P
Vertogradov, LS
Verzocchi, M
Vilanova, D
Villeneuve-Seguier, F
Vint, P
Volkac, 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
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.
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Alexeev, G. D.
Alkhazov, G.
Alton, A.
Alverson, G.
Alves, G. A.
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Ancu, L. S.
Andeen, T.
Andrie, B.
Anzelc, M. S.
Aoki, M.
Arnoud, Y.
Arov, M.
Arthaud, M.
Askew, A.
Asman, B.
Jesus, A. C. S. Assis
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Avila, C.
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Bagby, L.
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Banduri, D. V.
Banerjee, P.
Banerjee, S.
Barberis, E.
Barfuss, A. -F
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Baringer, R.
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.
Biscaratt, 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.
Carrera, E.
Carvalho, W.
Casey, B. C. K.
Castilla-Valdez, H.
Chakrabarti, S.
Chakraborty, D.
Chan, K. M.
Chandra, A.
Cheu, E.
Chevallie, 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
DeVaughan, K.
Degenhardt, J. D.
Deliot, F.
Demarteau, M.
Demina, R.
Denisov, D.
Denisov, S. P.
Desai, S.
Diehl, H. T.
Diesburg, M.
Dominguez, A.
Dong, H.
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, R.
Evans, H.
Evdokimov, A.
Evdolimov, 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, R.
Geist, W.
Geng, W.
Gerber, C. E.
Gershtein, Y.
Gillberg, D.
Ginther, G.
Gollub, N.
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, R.
Haas, A.
Hadley, N. J.
Haefner, R.
Hagopian, S.
Haley, J.
Hall, I.
Hall, R. E.
Han, L.
Harder, K.
Harel, A.
Hauptman, 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.
Hoeth, H.
Hohifeld, M.
Hossain, S.
Houben, R.
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, R.
Juste, A.
Kajfasz, E.
Kalk, J. M.
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.
Kirschu, 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, R.
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.
Liug, Y.
Liu, Z.
Lobodenko, A.
Lokajicek, M.
Love, P.
Lubatti, H. J.
Luna, R.
Lyon, A. L.
Maciel, A. K. A.
Mackin, D.
Madaras, R. J.
Maettig, R.
Magass, C.
Magerkurth, A.
Mal, P. K.
Malbouisson, H. B.
Malik, S.
Malyshev, V. L.
Maravin, Y.
Martin, B.
McCarthy, R.
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.
y Garzon, G. J. Otero
Owen, M.
Padley, P.
Pangilinan, M.
Parashar, N.
Park, S. -J.
Parkae, 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.
Pleie, 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.
Rieger, J.
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.
Scharnberger, 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.
Shchulkin, 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.
Steele, J.
Stolin, V.
Stoyanova, D. A.
Strandberg, J.
Strandberg, S.
Strang, M. A.
Strauss, E.
Strauss, M.
Stroehmer, R.
Strom, D.
Stutte, L.
Surnowidagdo, S.
Svoisky, P.
Sznajder, A.
Tamburello, P.
Tanasijczuk, A.
Taylor, W.
Tiller, B.
Tissandier, F.
Titov, M.
Tokmenin, V. V.
Tschudi, Y.
Torchiani, I.
Tsybychev, D.
Tuchming, B.
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.
Varelasly, N.
Varnes, E. W.
Vasilyev, I. A.
Verdier, P.
Vertogradov, L. S.
Verzocchi, M.
Vilanova, D.
Villeneuve-Seguier, F.
Vint, P.
Volkac, 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.
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.
TI Search for scalar leptoquarks and T-odd quarks in the acoplanar jet
topology using 2.5 fb(-1) of p(p)over-bar collision data at root s=1.96
TeV
SO PHYSICS LETTERS B
LA English
DT Article
ID EVENTS
AB A search for new physics in the acoplanar jet topology has been performed in 2.5 fb(-1) of data from p (p) over bar collisions at root s = 1.96 TeV, recorded by the DO detector at the Fermilab Tevatron Collider. The numbers of events with exactly two acoplanar jets and missing transverse energy are in good agreement with the Standard Model expectations. The result of this search has been used to set a lower mass limit of 205 GeV at the 95% C.L. on the mass of a scalar leptoquark when this particle decays exclusively into a quark and a neutrino. In the framework of the Little Higgs model with T-parity, limits have also been obtained on the T-odd quark mass as a function of the T-odd photon mass. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Biscaratt, C.; Grenier, G.; Kurca, T.; Lebrun, R.; Muanza, G. S.; Tschudi, Y.; Verdier, P.] Univ Lyon 1, CNRS, IN2P3, IPNL, F-69622 Villeurbanne, France.
[Biscaratt, C.; Grenier, G.; Kurca, T.; Lebrun, R.; Muanza, G. S.; Tschudi, Y.; Verdier, P.] Univ Lyon, Lyon, France.
[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; Luna, R.; Malbouisson, H. B.; Mundim, L.; Nogima, H.; da Silva, W. L. Prado; Rodrigues, R. F.; Sznajder, A.] Univ Estado Rio de Janeiro, 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.; 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.] Univ Alberta, Edmonton, AB, Canada.
[Bu, X. B.; Han, L.; Liu, Z.; Yin, H.] Univ Sci & Technol China, Hefei 230026, Peoples R China.
[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.
[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.; Volkac, 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, R.; Gris, Ph.; Lacroix, F.; Tissandier, F.] Univ Clermont Ferrand, LPC, CNRS, IN2P3, Clermont, France.
[Arnoud, Y.; Chevallie, F.; Crepe-Renaudin, S.; Martin, B.; Sajot, G.; Stark, J.] Univ Grenoble 1, CNRS, LPSC, IN2P3,Inst Natl Polytech Grenoble, Grenoble, France.
[Barfuss, A. -F; Cousinou, M. -C.; Duperrin, A.; Geng, W.; Kajfasz, E.; Kermiche, S.; Nagy, E.] Aix Marseille Univ, CNRS, IN2P3, CPPM, Marseille, France.
[Calvet, S.; Duflot, L.; Grivaz, J. -F.; Jaffre, M.; Ochando, C.; Petroff, P.] Univ Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, France.
[Andrie, B.; Bernardi, G.; Lellouch, J.; Sanders, M. P.; Sonnenschein, L.] Univ Paris 06, CNRS, IN2P3, LPNHE, Paris, France.
[Andrie, B.; Bernardi, G.; Lellouch, J.; Sanders, M. P.; Sonnenschein, L.] Univ Paris 07, Paris, France.
[Arthaud, M.; Bassler, U.; Besancon, M.; Chakrabarti, S.; Couderc, F.; Deliot, F.; Royon, C.; Shary, V.; Titov, M.; Tuchming, B.; Vilanova, D.] CEA, Irfu, SPP, Saclay, France.
[Geist, W.; Ripp-Baudot, I.; Siccardi, V.] Univ Strasbourg 1, CNRS, IN2P3, IPHC, Strasbourg, France.
[Hebbeker, T.; Kirschu, M.; Magass, C.; Meyer, A.] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany.
[Buescher, V.; Hensel, C.; Hohifeld, M.; Meyer, J.; Mundal, O.; Park, S. -J.; Pleie, 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, G.] Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany.
[Calfayan, P.; Grohsjean, A.; Haefner, R.; Nunnemann, T.; Schaile, D.; Stroehmer, R.; Tiller, B.] Univ Munich, Munich, Germany.
[Hoeth, H.; Maettig, R.; 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.; Shivpuri, R. 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. -J.] Korea Univ, Korea Detector Lab, Seoul, South Korea.
[Choi, S.] Sungkyunkwan Univ, Suwon, South Korea.
[Castilla-Valdez, H.; De la Cruz-Burelo, E.; Podesta-Lerma, P. L. M.; Sanchez-Hernandez, A.] CINVESTAV, Mexico City 14000, DF, Mexico.
[Hegeman, J. G.; Houben, R.; van den Berg, P. J.; van Leeuwen, W. M.] NIKHEF H, FOM Inst, NL-1009 DB Amsterdam, Netherlands.
[Hegeman, J. G.; Houben, R.; 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.; Naumann, N. A.] 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, R.; 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.; Evdolimov, V. N.; Kozelov, A. V.; Lipaev, V. V.; Popov, A. V.; Shchulkin, 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, S.] Petersburg Nucl Phys Inst, St Petersburg, Russia.
[Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, S.] Stockholm Univ, S-10691 Stockholm, Sweden.
[Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, S.] Lund Univ, Lund, Sweden.
[Asman, B.; Belanger-Champagne, C.; Gollub, N.; Strandberg, S.] Royal Inst Technol, Stockholm, Sweden.
[Asman, B.; Belanger-Champagne, C.; Gollub, N.; 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.; Christoudias, T.; Davies, G.; Hays, J.; Jesik, R.; Jonsson, R.; 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.; Tamburello, P.; Varnes, E. W.] Univ Arizona, Tucson, AZ 85721 USA.
[Madaras, R. J.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Madaras, R. J.] Univ Calif Berkeley, 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.; Surnowidagdo, S.; Wahl, H. D.] Florida State Univ, Tallahassee, FL 32306 USA.
[Aoki, M.; Bagby, L.; Baldin, B.; 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.; Johnston, D.; 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.; y Garzon, G. J. Otero; 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.; Varelasly, N.] Univ Illinois, Chicago, IL 60607 USA.
[Blazey, G.; Chakraborty, D.; 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.; Rieger, J.; 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.; Svoisky, P.; Warchol, J.; Wayne, M.] Univ Notre Dame, Notre Dame, IN 46556 USA.
[Parashar, N.] Purdue Univ Calumet, Hammond, IN 46323 USA.
[Hauptman, M.] Iowa State Univ, Ames, IA 50011 USA.
[Baringer, R.; Bean, A.; Clutter, J.; Moulik, T.; Wilson, G. W.] Univ Kansas, Lawrence, KS 66045 USA.
[Ahsan, M.; Banduri, 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.; Kalk, J. M.; Sawyer, L.; Steele, J.; Wobisch, M.] Louisiana Tech Univ, Ruston, LA 71272 USA.
[Dominguez, A.; 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.; Strandberg, J.] Boston Univ, Boston, MA 02215 USA.
[Alverson, G.; Barberis, E.; Hesketh, G.; Wood, D. R.] Northeastern Univ, Boston, MA 02115 USA.
[Alton, A.; Degenhardt, J. D.; Magerkurth, A.; O'Neil, D. C.; Qian, J.; Zhou, B.] Univ Michigan, Ann Arbor, MI 48109 USA.
[Abolins, M.; Benitez, J. A.; Brock, R.; Dyer, J.; Edmunds, D.; 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.; DeVaughan, K.; Eads, M.; Malik, S.; Snow, G. R.; Voutilainen, M.] Univ Nebraska, Lincoln, NE 68588 USA.
[Schwartzman, A.; Wagner, R.] Princeton Univ, Princeton, NJ 08544 USA.
[Haley, J.; Iashvili, I.; Kharchilava, A.; Kumar, A.; Strang, M. A.; Tully, C.] 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.; Rijssenbeek, M.; 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.
[Dong, H.; Grannis, P. D.; Guo, F.; Guo, J.; Herner, K.; Hobbs, J. D.; Hu, Y.; McCarthy, R.; Scharnberger, R. D.; Strauss, E.; Tsybychev, D.; Zhu, J.] SUNY Stony Brook, Stony Brook, NY 11794 USA.
[Begel, M.; Patwa, A.; Protopopescu, S.; Snyder, S.; Yip, K.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Evdokimov, A.; Snow, J.] Langston Univ, Langston, OK 73050 USA.
[Abbott, B.; Gutierrez, R.; 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.; Christofek, L.; 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.; Buescher, V.; 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 Verdier, P (reprint author), Univ Lyon 1, CNRS, IN2P3, IPNL, F-69622 Villeurbanne, France.
EM verdier@ipnl.in2p3.fr
RI Novaes, Sergio/D-3532-2012; Mercadante, Pedro/K-1918-2012; Mundim,
Luiz/A-1291-2012; Yip, Kin/D-6860-2013; Ancu, Lucian Stefan/F-1812-2010;
Shivpuri, R K/A-5848-2010; 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; De, Kaushik/N-1953-2013; Fisher, Wade/N-4491-2013;
Alves, Gilvan/C-4007-2013; Deliot, Frederic/F-3321-2014; Sharyy,
Viatcheslav/F-9057-2014; Kupco, Alexander/G-9713-2014; Christoudias,
Theodoros/E-7305-2015; KIM, Tae Jeong/P-7848-2015; Sznajder,
Andre/L-1621-2016; Li, Liang/O-1107-2015
OI Novaes, Sergio/0000-0003-0471-8549; Mundim, Luiz/0000-0001-9964-7805;
Yip, Kin/0000-0002-8576-4311; Ancu, Lucian Stefan/0000-0001-5068-6723;
Dudko, Lev/0000-0002-4462-3192; De, Kaushik/0000-0002-5647-4489; Sharyy,
Viatcheslav/0000-0002-7161-2616; Christoudias,
Theodoros/0000-0001-9050-3880; KIM, Tae Jeong/0000-0001-8336-2434;
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 (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); [CNRS/IN2P3]
FX We thank M. Carena. J. Hubisz, and M. Perelstein for their valuable help
with the LHT model, 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 27
TC 17
Z9 17
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD OCT 23
PY 2008
VL 668
IS 5
BP 357
EP 363
DI 10.1016/j.physletb.2008.09.014
PG 7
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 369TO
UT WOS:000260717000002
ER
PT J
AU Garnsworthy, AB
Regan, PH
Caceres, L
Pietri, Y
Sun, Y
Rudolph, D
Gorska, M
Podolyak, Z
Steer, SJ
Hoischen, R
Heinz, A
Becker, F
Bednarczyk, R
Doornenbal, P
Geissel, H
Gerl, J
Grawe, H
Grebosz, J
Kelic, A
Kojouharov, I
Kurz, N
Montes, F
Prokopowicz, W
Saito, T
Schaffner, H
Tachenov, S
Werner-Malento, E
Wollersheim, HJ
Benzoni, G
Blank, BB
Brandau, C
Bruce, AM
Camera, F
Catford, WN
Cullen, IJ
Dornbradi, Z
Estevez, E
Gelletly, W
Ilie, G
Jolie, J
Jones, GA
Jungclaus, A
Kmiecik, M
Kondev, FG
Kurtukian-Nieto, T
Lalkovski, S
Liu, Z
Maj, A
Myalski, S
Pfutzner, M
Schwertel, S
Shizuma, T
Simons, AJ
Walker, PM
Wieland, O
Xu, FR
AF Garnsworthy, A. B.
Regan, P. H.
Caceres, L.
Pietri, Y.
Sun, Y.
Rudolph, D.
Gorska, M.
Podolyak, Zs.
Steer, S. J.
Hoischen, R.
Heinz, A.
Becker, F.
Bednarczyk, R.
Doornenbal, P.
Geissel, H.
Gerl, J.
Grawe, H.
Grebosz, J.
Kelic, A.
Kojouharov, I.
Kurz, N.
Montes, F.
Prokopowicz, W.
Saito, T.
Schaffner, H.
Tachenov, S.
Werner-Malento, E.
Wollersheim, H. J.
Benzoni, G.
Blank, B. B.
Brandau, C.
Bruce, A. M.
Camera, F.
Catford, W. N.
Cullen, I. J.
Dornbradi, Zs.
Estevez, E.
Gelletly, W.
Ilie, G.
Jolie, J.
Jones, G. A.
Jungclaus, A.
Kmiecik, M.
Kondev, F. G.
Kurtukian-Nieto, T.
Lalkovski, S.
Liu, Z.
Maj, A.
Myalski, S.
Pfutzner, M.
Schwertel, S.
Shizuma, T.
Simons, A. J.
Walker, P. M.
Wieland, O.
Xu, F. R.
TI Neutron-proton pairing competition in N = Z nuclei: Metastable state
decays in the proton dripline nuclei (82)(41)Nb and (86)(43)TC (vol 660,
pg 326, 2008)
SO PHYSICS LETTERS B
LA English
DT Correction
C1 [Garnsworthy, A. B.; Regan, P. H.; Pietri, Y.; Podolyak, Zs.; Steer, S. J.; Brandau, C.; Catford, W. N.; Cullen, I. J.; Gelletly, W.; Jones, G. A.; Liu, Z.; Shizuma, T.; Simons, A. J.; Walker, P. M.] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England.
[Garnsworthy, A. B.; Heinz, A.] Yale Univ, WNSL, New Haven, CT 06520 USA.
[Caceres, L.; Gorska, M.; Hoischen, R.; Becker, F.; Bednarczyk, R.; Doornenbal, P.; Geissel, H.; Gerl, J.; Grawe, H.; Grebosz, J.; Kelic, A.; Kojouharov, I.; Kurz, N.; Montes, F.; Prokopowicz, W.; Saito, T.; Schaffner, H.; Tachenov, S.; Werner-Malento, E.; Wollersheim, H. J.; Brandau, C.] GSL, D-64291 Darmstadt, Germany.
[Caceres, L.; Jungclaus, A.] Univ Autonoma Madrid, Dept Teor, Madrid, Spain.
[Sun, Y.] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
[Sun, Y.] Univ Notre Dame, Joint Inst Nucl Astrophys, Notre Dame, IN 46556 USA.
[Sun, Y.] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China.
[Rudolph, D.; Hoischen, R.] Lund Univ, Dept Phys, S-22100 Lund, Sweden.
[Bednarczyk, R.; Grebosz, J.; Kmiecik, M.; Maj, A.] Inst Nucl Phys, PL-31342 Krakow, Poland.
[Werner-Malento, E.; Pfutzner, M.] Warsaw Univ, IEP, PL-00681 Warsaw, Poland.
[Benzoni, G.; Camera, F.; Wieland, O.] Univ Milan, I-20133 Milan, Italy.
[Benzoni, G.; Camera, F.; Wieland, O.] Ist Nazl Fis Nucl, I-20133 Milan, Italy.
[Blank, B. B.; Kurtukian-Nieto, T.] CEN Bordeaux Gradignan, F-33175 Gradignan, France.
[Bruce, A. M.; Lalkovski, S.] Univ Brighton, Sch Engn, Brighton BN2 4GJ, E Sussex, England.
[Dornbradi, Zs.] Inst Nucl Res, H-4001 Debrecen, Hungary.
[Estevez, E.; Kurtukian-Nieto, T.] Univ Santiago de Compostela, Santiago De Compostela, Spain.
[Ilie, G.; Jolie, J.] Univ Cologne, IKP, D-50937 Cologne, Germany.
[Ilie, G.] Natl Inst Phys & Nucl Engn, Bucharest, Romania.
[Kondev, F. G.] Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA.
[Lalkovski, S.] Univ Sofia St Kliment Ohridski Sofia, Fac Phys, Sofia, Bulgaria.
[Schwertel, S.] Tech Univ Munich, Phys Dept E12, D-8046 Garching, Germany.
[Shizuma, T.] Japan Atom Energy Agcy, Kizu, Kyoto 6190215, Japan.
[Simons, A. J.] AWE Plc, Aldermaston RG7 4PR, Berks, England.
[Xu, F. R.] Peking Univ, Dept Tech Phys, Beijing 100871, Peoples R China.
RP Garnsworthy, AB (reprint author), Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England.
EM a.garnsworthy@surrey.ac.uk
RI Gerl, Juergen/A-3255-2011; Wieland, Oliver/G-1784-2011; Xu,
Furong/K-4178-2013; Heinz, Andreas/E-3191-2014; Kurtukian-Nieto,
Teresa/J-1707-2014; Bruce, Alison/K-7663-2016; Sun, Yang/P-2417-2015
OI Kurtukian-Nieto, Teresa/0000-0002-0028-0220; Bruce,
Alison/0000-0003-2871-0517;
NR 1
TC 4
Z9 5
U1 0
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD OCT 23
PY 2008
VL 668
IS 5
BP 460
EP 460
DI 10.1016/j.physletb.2008.09.020
PG 1
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 369TO
UT WOS:000260717000022
ER
PT J
AU Knap, J
Barton, NR
Hornung, RD
Arsenlis, A
Becker, R
Jefferson, DR
AF Knap, J.
Barton, N. R.
Hornung, R. D.
Arsenlis, A.
Becker, R.
Jefferson, D. R.
TI Adaptive sampling, in hierarchical simulation
SO INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
LA English
DT Article
DE solids; materials science; multi-scale; plasticity; finite elements
ID POLYCRYSTAL PLASTICITY; POLYNOMIAL INTERPOLATION; NANOMECHANICS; SOLIDS;
PREDICTION; TABULATION; MODEL
AB We propose art adaptive sampling methodology for hierarchical multi-scale simulation. The method Utilizes a moving kriging interpolation to significantly reduce the number of evaluations of finer-scale response functions to provide essential constitutive information to a coarser-scale simulation model. The Underlying interpolation scheme is unstructured and adaptive to handle the transient nature of a simulation. To handle the dynamic construction and searching of a potentially large set of finer-scale response data, we employ a dynamic metric-tree database. We study the performance of our adaptive sampling methodology for a two-level multi-scale model involving a coarse-scale finite element simulation and a fine-scale crystal plasticity-based constitutive law. Copyright (c) 2008 John Wiley & Soils, Ltd.
C1 [Knap, J.; Barton, N. R.; Hornung, R. D.; Arsenlis, A.; Becker, R.; Jefferson, D. R.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Knap, J (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM jaroslaw.knap@llnl.gov
RI Becker, Richard/I-1196-2013
NR 47
TC 13
Z9 13
U1 1
U2 11
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 OCT 22
PY 2008
VL 76
IS 4
BP 572
EP 600
DI 10.1002/nme.2339
PG 29
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
Applications
SC Engineering; Mathematics
GA 364QY
UT WOS:000260351400007
ER
PT J
AU Forrest, TR
Bland, SR
Wilkins, SB
Walker, HC
Beale, TAW
Hatton, PD
Prabhakaran, D
Boothroyd, AT
Mannix, D
Yakhou, F
McMorrow, DF
AF Forrest, T. R.
Bland, S. R.
Wilkins, S. B.
Walker, H. C.
Beale, T. A. W.
Hatton, P. D.
Prabhakaran, D.
Boothroyd, A. T.
Mannix, D.
Yakhou, F.
McMorrow, D. F.
TI Ordering of localized electronic states in multiferroic TbMnO(3): a soft
X-ray resonant scattering study
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID POLARIZATION
AB Soft x-ray resonant scattering (XRS) has been used to observe directly, for the first time, the ordering of localized electronic states on both the Mn and the Tb sites in multiferroic TbMnO(3). Large resonant enhancements of the x-ray scattering cross-section were observed when the incident photon energy was tuned to either the Mn L or Tb M edges which provide information on the Mn 3d and Tb 4f electronic states, respectively. The temperature dependence of the XRS signal establishes, in a model independent way, that in the high-temperature phase (28 K <= T <= 42 K) the Mn 3d sublattice displays long-range order. The Tb 4f sublattices are found to order only on entering the combined ferroelectric/magnetic state below 28 K. Our results are discussed with respect to recent hard XRS experiments ( sensitive to spatially extended orbitals) and neutron scattering.
C1 [Forrest, T. R.; Walker, H. C.; McMorrow, D. F.] UCL, London Ctr Nanotechnol, London WC1E 6BT, England.
[Bland, S. R.; Beale, T. A. W.; Hatton, P. D.] Univ Durham, Dept Phys, Durham DH1 3LE, England.
[Wilkins, S. B.] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
[Prabhakaran, D.; Boothroyd, A. T.] Univ Oxford, Clarendon Lab, Dept Phys, Oxford OX1 3PU, England.
[Mannix, D.] UJF, CNRS, Inst Neel, F-38042 Grenoble, France.
[Yakhou, F.] European Synchrotron Radiat Facil, F-38043 Grenoble, France.
RP Forrest, TR (reprint author), UCL, London Ctr Nanotechnol, Gower St, London WC1E 6BT, England.
EM t.forrest@ucl.ac.uk
RI McMorrow, Desmond/C-2655-2008; Walker, Helen/C-4201-2011; Hatton,
Peter/J-8445-2014
OI McMorrow, Desmond/0000-0002-4947-7788; Walker,
Helen/0000-0002-7859-5388;
FU EPSRC; Wolfson Royal Society Award; Office of Science, US Department of
Energy [DE-AC02-98CH10886]
FX The authors thank R Bean for his experimental assistance. Work in London
was supported by the EPSRC and a Wolfson Royal Society Award and in
Durham and Oxford by the EPSRC. The work at Brookhaven National
Laboratory is supported by the Office of Science, US Department of
Energy, under contract no. DE-AC02-98CH10886.
NR 24
TC 15
Z9 15
U1 1
U2 6
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 OCT 22
PY 2008
VL 20
IS 42
AR 422205
DI 10.1088/0953-8984/20/42/422205
PG 5
WC Physics, Condensed Matter
SC Physics
GA 355FB
UT WOS:000259693700005
ER
PT J
AU Sebastian, SE
Gillett, J
Harrison, N
Lau, PHC
Singh, DJ
Mielke, CH
Lonzarich, GG
AF Sebastian, Suchitra E.
Gillett, J.
Harrison, N.
Lau, P. H. C.
Singh, D. J.
Mielke, C. H.
Lonzarich, G. G.
TI Quantum oscillations in the parent magnetic phase of an iron arsenide
high temperature superconductor
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID FERMI-SURFACE; LAO1-XFXFEAS
AB We report measurements of quantum oscillations in SrFe(2)As(2)-which is an antiferromagnetic parent of the iron arsenide family of superconductors-known to become superconducting under doping and the application of pressure. The magnetic field and temperature dependences of the oscillations between 20 and 55 T in the liquid helium temperature range suggest that the electronic excitations are those of a Fermi liquid. We show that the observed Fermi surface comprising small pockets is consistent with the formation of a spin-density wave. Our measurements thus demonstrate that high T(c) superconductivity can occur on doping or pressurizing a conventional metallic spin-density wave state.
C1 [Sebastian, Suchitra E.; Gillett, J.; Lau, P. H. C.; Lonzarich, G. G.] Univ Cambridge, Cavendish Lab, Cambridge CB3 OHE, England.
[Harrison, N.; Mielke, C. H.] Los Alamos Natl Lab, NHMFL, Los Alamos, NM 87545 USA.
[Singh, D. J.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Sebastian, SE (reprint author), Univ Cambridge, Cavendish Lab, J J Thomson Ave, Cambridge CB3 OHE, England.
EM suchitra@phy.cam.ac.uk
RI Singh, David/I-2416-2012;
OI Harrison, Neil/0000-0001-5456-7756
NR 32
TC 132
Z9 134
U1 1
U2 15
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 OCT 22
PY 2008
VL 20
IS 42
AR 422203
DI 10.1088/0953-8984/20/42/422203
PG 5
WC Physics, Condensed Matter
SC Physics
GA 355FB
UT WOS:000259693700003
ER
PT J
AU Yu, SW
Tobin, JG
Soderlind, P
AF Yu, S. W.
Tobin, J. G.
Soderlind, P.
TI An alternative model for electron correlation in Pu
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID RESOLVED PHOTOELECTRON-SPECTROSCOPY; DELTA-PU; SPIN ORIENTATION; VALENCE
BANDS; 5F STATES; PLUTONIUM; MOMENTS
AB Using a density functional theory based approach that treats the 5f electrons relativistically, a Pu electronic structure with zero net magnetic moment is obtained, where the 5f orbital and 5f spin moments cancel each other. By combining the spin and orbital specific densities of states with state, spin and polarization specific transition moments, it is possible to reconstruct the experimentally observed photoemission spectra from Pu. Extrapolating to a spin-resolving Fano configuration, it is shown how this would resolve the extant controversy over Pu electronic structure.
C1 [Yu, S. W.; Tobin, J. G.; Soderlind, P.] LLNS LLC, Lawrence Livermore Natl Lab, Livermore, CA USA.
RP Yu, SW (reprint author), LLNS LLC, Lawrence Livermore Natl Lab, Livermore, CA USA.
EM Yu21@LLNL.Gov
RI Tobin, James/O-6953-2015
FU US Department of Energy
FX Lawrence Livermore National Laboratory is operated by Lawrence Livermore
National Security, LLC, for the US Department of Energy, National
Nuclear Security Administration under Contract DE-AC52-07NA27344. Work
that was performed by LLNL personnel was supported in part by the Office
of Basic Energy Science at the US Department of Energy.
NR 27
TC 16
Z9 16
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD OCT 22
PY 2008
VL 20
IS 42
AR 422202
DI 10.1088/0953-8984/20/42/422202
PG 5
WC Physics, Condensed Matter
SC Physics
GA 355FB
UT WOS:000259693700002
ER
PT J
AU Chen, S
Ferreira, PJ
Sheng, WC
Yabuuchi, N
Allard, LF
Shao-Horn, Y
AF Chen, Shuo
Ferreira, Paulo J.
Sheng, Wenchao
Yabuuchi, Naoaki
Allard, Lawrence F.
Shao-Horn, Yang
TI Enhanced activity for oxygen reduction reaction on "Pt(3)CO"
nanoparticles: Direct evidence of percolated and sandwich-segregation
structures
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID TRANSITION-METAL-ALLOYS; ELECTRONIC-STRUCTURE; FUEL-CELLS; PT-CO;
SURFACES; ELECTROCATALYSIS; STABILITY; FE; TRENDS; STRAIN
AB Atomically resolved structures and composition of Pt alloy nanoparticles were obtained using aberration-corrected high-angle dark field imaging, which was correlated to specific ORR activity based on a Pt surface area. The enhanced specific ORR activity (similar to 2 times relative to Pt) of acid-treated "Pt(3)Co" nanoparticles can be related to composition variations at the atomic scale and the atomic scale and the formation of percolated Pt-rich and Pt-poor regions within individual particles. Upon annealing, we show direct evidence of surface Pt sandwich-segregation structures, which correspond to a specific ORR activity similar to 4 times relative to Pt.
C1 [Chen, Shuo; Sheng, Wenchao; Yabuuchi, Naoaki; Shao-Horn, Yang] MIT, Electrochem Energy Lab, Cambridge, MA 02139 USA.
[Ferreira, Paulo J.] Univ Texas Austin, Mat Sci & Engn Program, Austin, TX 78712 USA.
[Allard, Lawrence F.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Shao-Horn, Y (reprint author), MIT, Electrochem Energy Lab, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
EM shaohorn@mit.edu
RI Sheng, Wenchao/E-6196-2012; Chen, Shuo/H-2491-2011; Yabuuchi,
Naoaki/F-8369-2012
OI Chen, Shuo/0000-0002-7145-1269; Yabuuchi, Naoaki/0000-0002-9404-5693
FU DOE Hydrogen Initiative program [DE-FG02-05ER15728]; National Science
Foundation [DMR 02-13282]; Asst. Sec. Renew, Energy, Vehicle Tech.
FX This work is supported in part by the DOE Hydrogen Initiative program
under Award No. DE-FG02-05ER15728 and the MRSEC Program of the National
Science Foundation under Award No. DMR 02-13282. The research made use
of the DOE ORNL HTML User Program sponsored by Asst. Sec. for Energy
Eff. and Renew. Energy, off. of FreedomCAR and Vehicle Tech.
NR 25
TC 178
Z9 181
U1 9
U2 94
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 OCT 22
PY 2008
VL 130
IS 42
BP 13818
EP 13819
DI 10.1021/ja802513y
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA 360HD
UT WOS:000260047700004
PM 18811156
ER
PT J
AU Zhao, JG
Wang, LH
Dong, DW
Liu, ZG
Liu, HZ
Chen, GF
Wu, D
Luo, JL
Wang, NL
Yu, Y
Jin, CQ
Guo, QZ
AF Zhao, Jinggeng
Wang, Luhong
Dong, Dawei
Liu, Zhiguo
Liu, Haozhe
Chen, Genfu
Wu, Dan
Luo, Jianlin
Wang, Nanlin
Yu, Yong
Jin, Changqing
Guo, Quanzhong
TI Struture stability and compressibility of iron-based superconductor
Nd(O(0.88)F(0.12))FeAs under high pressure
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID LAYERED QUATERNARY COMPOUND; EARTH; METAL
AB The high-pressure angle-dispersive X-ray diffraction experiments on the iron-based superconductor Nd(O(0.88)F(0.12))FeAs were performed up to 32.7 GPa at room temperature. An isostructural phase transition starts at similar to 10 GPa. When pressure is higher than 13.5 GPa, Nd (O(0.88)F(0.12))FeAs completely transforms to a high-pressure phase, which remains the same tetragonal structure with a larger a-axis and smaller c-axis than those of the low-pressure phase. The ambient conditions isothermal bulk moduli B(0) are derived as 102(2) and 245(9) GPa for the low-pressure phase and high-pressure phase, respectively. The structure analysis based on the Rietveld refinement methods shows the difference of pressure dependence of the Fe-As and Nd-(O, F) bonding distances, as well as As-Fe-As and Nd-(O, F)-Nd angles between the low-pressure phase and high-pressure phase.
C1 [Zhao, Jinggeng; Wang, Luhong; Dong, Dawei; Liu, Zhiguo; Liu, Haozhe] Harbin Inst Technol, Nat Sci Res Ctr, Acad Fundamental & Interdisciplinary Sci, Harbin 150080, Peoples R China.
[Chen, Genfu; Wu, Dan; Luo, Jianlin; Wang, Nanlin; Yu, Yong; Jin, Changqing] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China.
[Guo, Quanzhong] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
RP Liu, HZ (reprint author), Harbin Inst Technol, Nat Sci Res Ctr, Acad Fundamental & Interdisciplinary Sci, Harbin 150080, Peoples R China.
EM jin@aphy.iphy.ac.cn; haozhe@hit.edu.cn; jin@aphy.iphy.ac.cn
RI Liu, Haozhe/E-6169-2011; Wang, Luhong/E-6234-2011
FU COMPRES; NSF MOST of China; New Century Excellent Talents and the
Excellent Team Program in Harbin Institute of Technology
FX We thank the support from COMPRES. This work was partly supported by NSF
& MOST of China, and the Program for New Century Excellent Talents and
the Excellent Team Program in Harbin Institute of Technology.
NR 12
TC 44
Z9 45
U1 2
U2 42
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 OCT 22
PY 2008
VL 130
IS 42
BP 13828
EP 13829
DI 10.1021/ja804229k
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA 360HD
UT WOS:000260047700009
PM 18817396
ER
PT J
AU Misra, S
Miller, GJ
AF Misra, Sumohan
Miller, Gordon J.
TI Gd(5-x)Y(x)Tt(4) (Tt = Si or Ge): Effect of metal substitution on
structure, bonding, and magnetism
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID ADIABATIC TEMPERATURE-CHANGE; ELECTRICAL-RESISTANCE;
PHASE-RELATIONSHIPS; NANOSCALE ZIPPERS; CRYSTAL-STRUCTURE; TRANSITION;
GD-5(SI2GE2); ALLOYS; GD5SI2GE2; SYSTEM
AB A crystallographic study and theoretical assessment of the Gd/Y site preferences in the Gd(5-x)Y(x)Tt(4) (Tt = Si, Ge) series prepared by high-temperature methods is presented. All structures for the (Tt = Si, Ge) series prepared by high-temperature methods is presented. All structures for the system (Tt = Si, Ge) series prepared by high-temperature methods is presented. All structures for the Gd(5-x)Y(x)Si(4) system belong to the orthorhombic, Gd(5)Si(4)-type (space group Pnma). For the Gd(5-x)Y(x)Ge(4) system, phases with x < 3.6 and x >= 4.4 adopt the orthorhombic, Sm(5)Ge(4)-type structure. For the composition range of 3.6 <= x <= 4.2, a monoclinic, U(2)Mo(3)Si(4)-type structure (space group P2(1)/c) occurs as the majority phase. This structure type has not been previously observed in the RE(5)T(4) (T = Si, Ge, Ga) system and differs from the known monoclinic structure of Gd(5)Si(2)Ge(2)-type (space group P2(1)/a) because all Ge center dot center dot center dot Ge contacts between slabs are equivalent. The structural relationships between the Sm5Ge4-type and the U(2)Mo(3)Si(4)-type structures are discussed. Single crystal refinements of the occupancies for the three sites for Gd/Y atoms in the asymmetric unit reveal a partially ordered arrangement of Gd and Y atoms. TB-LMTO-ASA calculations were performed to study these atomic distributions as well as to elucidate possible electronic forces that might drive the structural variation. These results illustrate the importance of one of the Gd/Y-sites in shaping the magnetic and structural features observed in Gd(5-x)Y(x)Tt(4) system. The magnetic properties of some of the Gd(5-x)Y(x)Tt(4) phases are also reported. Germanides with x <= 2 show a metamagnetic-type transition similar to Gd(5)Ge(4) from 57-92(2) K. As the Y concentration increases (3 <= x <= 4), these phases exhibit at least ferrimagnetic ordering with transition temperatures ranging from 15-31(2) K to the paramagnetic state.
C1 [Miller, Gordon J.] Iowa State Univ, Dept Chem, Ames, IA 50011 USA.
Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
RP Miller, GJ (reprint author), Iowa State Univ, Dept Chem, Ames, IA 50011 USA.
EM gmiller@iastate.edu
FU Iowa State University [DE-AC02-07CH11358]; Materials Sciences Division
of the Office of Basic Energy Sciences of the U.S. Department of Energy
FX The authors thank Prof. Vitalij Pecharsky and Mr. Roger Rink for using
the Lakeshore Magnetometer. This work was carried out at the Ames
Laboratory, which 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 Materials Sciences Division of the Office of Basic
Energy Sciences of the U.S. Department of Energy.
NR 47
TC 39
Z9 39
U1 1
U2 10
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 OCT 22
PY 2008
VL 130
IS 42
BP 13900
EP 13911
DI 10.1021/ja802848r
PG 12
WC Chemistry, Multidisciplinary
SC Chemistry
GA 360HD
UT WOS:000260047700034
PM 18817384
ER
PT J
AU Sun, YY
Kim, YH
Lee, K
Zhang, SB
AF Sun, Y. Y.
Kim, Yong-Hyun
Lee, Kyuho
Zhang, S. B.
TI Accurate and efficient calculation of van der Waals interactions within
density functional theory by local atomic potential approach
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID GENERALIZED GRADIENT APPROXIMATION; NONCOVALENT INTERACTIONS; STACKING
INTERACTIONS; INTERACTION ENERGIES; BASE-PAIRS; COMPLEXES; HYDROGEN;
BIOMOLECULES; SET; STABILIZATION
AB Density functional theory (DFT) in the commonly used local density or generalized gradient approximation fails to describe van der Waals (vdW) interactions that are vital to organic, biological, and other molecular systems. Here, we propose a simple, efficient, yet accurate local atomic potential (LAP) approach, named DFT+LAP, for including vdW interactions in the framework of DFT. The LAPs for H, C, N, and O are generated by fitting the DFT+LAP potential energy curves of small molecule dimers to those obtained from coupled cluster calculations with single, double, and perturbatively treated triple excitations, CCSD(T). Excellent transferability of the LAPs is demonstrated by remarkable agreement with the JSCH-2005 benchmark database [P. Jurecka Phys. Chem. Chem. Phys. 8, 1985 (2006)], which provides the interaction energies of CCSD(T) quality for 165 vdW and hydrogen-bonded complexes. For over 100 vdW dominant complexes in this database, our DFT+LAP calculations give a mean absolute deviation from the benchmark results less than 0.5 kcal/mol. The DFT+LAP approach involves no extra computational cost other than standard DFT calculations and no modification of existing DFT codes, which enables straightforward quantum simulations, such as ab initio molecular dynamics, on biomolecular systems, as well as on other organic systems. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2992078]
C1 [Sun, Y. Y.; Kim, Yong-Hyun; Lee, Kyuho; Zhang, S. B.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Sun, Y. Y.; Lee, Kyuho; Zhang, S. B.] Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA.
RP Sun, YY (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM zhangs9@rpi.edu
RI Lee, Kyuho/B-9370-2008; Kim, Yong-Hyun/C-2045-2011; Krausnick,
Jennifer/D-6291-2013; Zhang, Shengbai/D-4885-2013; Sun,
Yi-Yang/H-4029-2014
OI Lee, Kyuho/0000-0001-9325-3717; Kim, Yong-Hyun/0000-0003-4255-2068;
Zhang, Shengbai/0000-0003-0833-5860;
FU DOE/OS [DE-AC02-05CH11231]; CCNI of Rensselaer Polytechnic Institute;
DOE/OS/BES; DOE/EERE [DE-AC36-99GO10337]
FX The authors thank E. Schwegler, J. DuBois, S. Hamel, and R. Q. Hood at
Lawrence Livermore National Lab, X. C. Zeng at the University of
Nebraska and D. C. Langreth at Rutgers University for helpful
discussions. Part of the calculations was done at NERSC, which is
supported by DOE/OS under Contract No. DE-AC02-05CH11231, and at CCNI of
Rensselaer Polytechnic Institute. This work was supported by DOE/OS/BES
and DOE/EERE under Contract No. DE-AC36-99GO10337.
NR 46
TC 58
Z9 58
U1 1
U2 13
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD OCT 21
PY 2008
VL 129
IS 15
AR 154102
DI 10.1063/1.2992078
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 363QA
UT WOS:000260280600002
PM 19045171
ER
PT J
AU Tatarkhanov, M
Fomin, E
Salmeron, M
Andersson, K
Ogasawara, H
Pettersson, LGM
Nilsson, A
Cerda, JI
AF Tatarkhanov, M.
Fomin, E.
Salmeron, M.
Andersson, K.
Ogasawara, H.
Pettersson, L. G. M.
Nilsson, A.
Cerda, J. I.
TI The structure of mixed H(2)O-OH monolayer films on Ru(0001)
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID SCANNING-TUNNELING-MICROSCOPY; LIQUID WATER; ADSORPTION; PT(111);
ELECTROOXIDATION; RUTHENIUM; HYDROXYL; PLATINUM; SURFACES; HYDROGEN
AB Scanning tunneling microscopy (STM) and x-ray absorption spectroscopy (XAS) have been used to study the structures produced by water on Ru(0001) at temperatures above 140 K. It was found that while undissociated water layers are metastable below 140 K, heating above this temperature produces drastic transformations, whereby a fraction of the water molecules partially dissociate and form mixed H(2)O-OH structures. X-ray photoelectron spectroscopy and XAS revealed the presence of hydroxyl groups with their O-H bond essentially parallel to the surface. STM images show that the mixed H(2)O-OH structures consist of long narrow stripes aligned with the three crystallographic directions perpendicular to the close-packed atomic rows of the Ru(0001) substrate. The internal structure of the stripes is a honeycomb network of H-bonded water and hydroxyl species. We found that the metastable low temperature molecular phase can also be converted to a mixed H(2)O-OH phase through excitation by the tunneling electrons when their energy is 0.5 eV or higher above the Fermi level. Structural models based on the STM images were used for density functional theory optimizations of the stripe geometry. The optimized geometry was then utilized to calculate STM images for comparison with the experiment. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2988903]
C1 [Tatarkhanov, M.; Fomin, E.; Salmeron, M.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Tatarkhanov, M.; Fomin, E.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Salmeron, M.] Univ Calif Berkeley, Div Engn & Mat Sci, Berkeley, CA 94720 USA.
[Andersson, K.; Ogasawara, H.; Nilsson, A.] Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
[Andersson, K.; Pettersson, L. G. M.; Nilsson, A.] Stockholm Univ, Albanova Univ Ctr, FYSIKUM, S-10691 Stockholm, Sweden.
[Andersson, K.] Tech Univ Denmark, Dept Phys, Ctr Individual Nanoparticle Funct, DK-2800 Lyngby, Denmark.
[Cerda, J. I.] CSIC, Inst Ciencia Mat, E-28049 Madrid, Spain.
RP Salmeron, M (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
EM mbsalmeron@lbl.gov
RI Cerda, Jorge/F-4043-2010; Nilsson, Anders/E-1943-2011; Pettersson,
Lars/F-8428-2011; Pettersson, Lars/J-4925-2013; Ogasawara,
Hirohito/D-2105-2009;
OI Cerda, Jorge/0000-0001-6176-0191; Nilsson, Anders/0000-0003-1968-8696;
Pettersson, Lars/0000-0003-1133-9934; Ogasawara,
Hirohito/0000-0001-5338-1079; Andersson, Klas J./0000-0002-6064-5658
FU U. S. Department of Energy [DE-AC02-05CH11231]; Spanish Ministry of
Science and Technology [MAT2007-66719-C0302]; XPS; XAS; NSF
[CHE-0089215]; Swedish Foundation for Strategic Research; Swedish
Natural Science Research Council
FX This work was supported by the Director, Office of Science, Office of
Basic Energy Sciences, and Materials Sciences and Engineering Division
of the U. S. Department of Energy under Contract No. DE-AC02-05CH11231.
The theoretical work was supported by the Spanish Ministry of Science
and Technology (Project No. MAT2007-66719-C0302). The XPS and XAS work
was supported by the NSF (Grant No. CHE-0089215) grant and by the
Swedish Foundation for Strategic Research, Swedish Natural Science
Research Council. The staff, David Shuh, Mary Gilles, and Tolek
Tyliszczak at beamline 11.0.2, Advanced Light Source, are gratefully
acknowledged.
NR 54
TC 25
Z9 25
U1 3
U2 34
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 OCT 21
PY 2008
VL 129
IS 15
AR 154109
DI 10.1063/1.2988903
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 363QA
UT WOS:000260280600009
PM 19045178
ER
PT J
AU Knobelspiesse, KD
Cairns, B
Schmid, B
Roman, MO
Schaaf, CB
AF Knobelspiesse, Kirk D.
Cairns, Brian
Schmid, Beat
Roman, Miguel O.
Schaaf, Crystal B.
TI Surface BRDF estimation from an aircraft compared to MODIS and ground
estimates at the Southern Great Plains site
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID REFLECTANCE DISTRIBUTION FUNCTION; BROAD-BAND CONVERSIONS;
REMOTE-SENSING DATA; BIDIRECTIONAL REFLECTANCE; PLANETARY ATMOSPHERES;
MULTIPLE-SCATTERING; ALBEDO RETRIEVALS; POLARIZED-LIGHT; NARROW-BAND;
VALIDATION
AB Surface albedo, which quantifies the amount of solar radiation reflected by the ground, is an important component of climate models. However, it can be highly heterogeneous, so obtaining adequate measurements are challenging. Global measurements require orbital observations, such as those provided by the Moderate Resolution Imaging Spectroradiometer (MODIS). Satellites estimate the surface bidirectional reflectance distribution function (BRDF), a surface inherent optical property, by correcting observed radiances for atmospheric effects and accumulating measurements at many viewing and solar geometries. The BRDF is then used to estimate albedo, an apparent optical property utilized by climate models. Satellite observations are often validated with ground radiometer measurements. However, spatial and temporal sampling differences mean that direct comparisons are subject to substantial uncertainties. We attempt to bridge the resolution gap using an airborne radiometer, the Research Scanning Polarimeter (RSP). RSP was flown at low altitude in the vicinity of the Department of Energy's Southern Great Plains Central Facility (SGP CF) in Oklahoma during the Aerosol Lidar Validation Experiment (ALIVE) in September, 2005. The RSP's scanning radiometers estimate the BRDF in seconds, rather than days required by MODIS, and utilize the Ames Airborne Tracking Sunphotometer (AATS-14) for atmospheric correction. Our comparison indicates that surface albedo estimates from RSP and MODIS agree with Best Estimate Radiation Flux (BEFLUX) ground radiometer observations at the SGP CF. Since the RSP is an airborne prototype of the Aerosol Polarimetery Sensor (APS), due to be launched into orbit in 2009, these techniques could form the basis for routine BRDF validation.
C1 [Knobelspiesse, Kirk D.; Cairns, Brian] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10025 USA.
[Cairns, Brian] NASA, Goddard Inst Space Studies, New York, NY 10025 USA.
[Schmid, Beat] Pacific NW Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99352 USA.
[Roman, Miguel O.; Schaaf, Crystal B.] Boston Univ, Ctr Remote Sensing, Dept Geog & Environm, Boston, MA 02215 USA.
RP Knobelspiesse, KD (reprint author), Columbia Univ, Dept Appl Phys & Appl Math, 2880 Broadway, New York, NY 10025 USA.
EM kdk2103@columbia.edu
RI Roman, Miguel/D-4764-2012; Knobelspiesse, Kirk/S-5902-2016;
OI Roman, Miguel/0000-0003-3953-319X; Knobelspiesse,
Kirk/0000-0001-5986-1751; Cairns, Brian/0000-0002-1980-1022
FU US National Science Foundation; U. S. Department of Energy, Office of
Science, Office of Biological and Environmental Research, Environmental
Sciences Division; ARM; National Aeronautics and Space Administration
(NASA)
FX The first author acknowledges support from the US National Science
Foundation, through a Fellowship in the IGERT Joint Program in Applied
Mathematics and Earth and Environmental Science at Columbia University
at the time of the ALIVE field campaign. BEFLUX data were obtained from
the Atmospheric Radiation Measurement (ARM) Program sponsored by the U.
S. Department of Energy, Office of Science, Office of Biological and
Environmental Research, Environmental Sciences Division. ALIVE was also
funded by ARM, and RSP participation during that experiment was funded
by the National Aeronautics and Space Administration (NASA). Thanks to
the many who helped collect the data used in this study: Ben Hovelman
was the J-31 pilot, Roy Johnson and Nicholas Truong were AATS-14
engineers, Rose Dominguez provided J-31 Navigational and GPS data, and
Warren Gore provided J-31 Meteorological data. Finally, thanks to both
the anonymous reviewers.
NR 49
TC 23
Z9 28
U1 1
U2 7
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD OCT 21
PY 2008
VL 113
IS D20
AR D20105
DI 10.1029/2008JD010062
PG 21
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 365GE
UT WOS:000260393100007
ER
PT J
AU Hohenbild, S
Grubel, C
Yushkov, GY
Oks, EM
Anders, A
AF Hohenbild, Stefan
Gruebel, Christoph
Yushkov, Georgy Yu
Oks, Efim M.
Anders, Andre
TI A study of vacuum arc ion velocities using a linear set of probes
SO JOURNAL OF PHYSICS D-APPLIED PHYSICS
LA English
DT Article
ID ENERGY-DISTRIBUTION; PLASMAS; CATHODE; CHARGE
AB The most likely velocity of ions moving away from vacuum arc cathode spots was measured using a set of probes along the path of plasma expansion. The goal was to determine how much, if any, change in the ion drift velocity occurs in the expanded plasma. The arc discharge current was perturbed to create plasma density markers whose travel is picked up by the set of probes. It was found that the perturbation with current oscillations did not result in consistent data because ion current maxima and minima are determined not only by the plasma production but also by the transients of the arc pulse and by the asymmetry of the ion velocity distribution function. Perturbation with a short current spike was more conclusive. The most likely ion velocity, which depends on the cathode material but is generally (1-3) x 10(4) m s(-1), was measured to be reduced (about 25%) with increasing distance (0.5 m) from the cathode, which can be explained by collisions of ions with the background of neutrals. The ion velocity was slightly increased when the arc current was increased (about 15% when going from 50 to 400 A), which correlated with enhanced arc voltage and power dissipation. The ion velocity could be enhanced (by about 20%) when the plasma was produced in a non-uniform magnetic field (up to 300 mT).
C1 [Anders, Andre] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Hohenbild, Stefan; Gruebel, Christoph] Univ Bundeswehr Munchen, Fak Electrotech & Informat Tech, EIT 1a, D-85577 Neubiberg, Germany.
[Yushkov, Georgy Yu; Oks, Efim M.] Russian Acad Sci, Inst High Current Elect, Tomsk 634055, Russia.
RP Anders, A (reprint author), Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM aanders@lbl.gov
RI Oks, Efim/A-9409-2014; Anders, Andre/B-8580-2009; Yushkov,
Georgy/O-8024-2015
OI Oks, Efim/0000-0002-9323-0686; Anders, Andre/0000-0002-5313-6505;
Yushkov, Georgy/0000-0002-7615-6058
FU US Department of Energy, Office of Nonproliferation and International
Security, Initiatives for Proliferation Prevention [IPP-LBNL-T2-196];
Lawrence Berkeley National Laboratory [DE-AC02-05CH11231]
FX Two of us (SH and ChG) thank Professor J Schein, UBW Munich, for
arranging the research opportunity at Berkeley. This work was supported
by the US Department of Energy, Office of Nonproliferation and
International Security, Initiatives for Proliferation Prevention,
Project No IPP-LBNL-T2-196, under Contract No DE-AC02-05CH11231 with the
Lawrence Berkeley National Laboratory.
NR 17
TC 2
Z9 3
U1 2
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0022-3727
EI 1361-6463
J9 J PHYS D APPL PHYS
JI J. Phys. D-Appl. Phys.
PD OCT 21
PY 2008
VL 41
IS 20
AR 205210
DI 10.1088/0022-3727/41/20/205210
PG 7
WC Physics, Applied
SC Physics
GA 361ML
UT WOS:000260131700036
ER
PT J
AU Ma, BH
Kwon, DK
Narayanan, M
Balachandran, U
AF Ma, Beihai
Kwon, Do-Kyun
Narayanan, Manoj
Balachandran, U. (Balu)
TI Leakage current characteristics and dielectric breakdown of
antiferroelectric Pb(0.92)La(0.08)Zr(0.95)Ti(0.05)O(3) film capacitors
grown on metal foils
SO JOURNAL OF PHYSICS D-APPLIED PHYSICS
LA English
DT Article
ID TITANATE THIN-FILMS; ELECTRONIC CONDUCTION; ELECTRICAL-PROPERTIES;
STATISTICS; MECHANISM; BUFFER
AB We have grown crack-free antiferroelectric (AFE) Pb(0.92)La(0.08)Zr(0.95)Ti(0.05)O(3) (PLZT) films on nickel foils by chemical solution deposition. To eliminate the parasitic effect caused by the formation of a low-permittivity interfacial oxide, we applied a conductive buffer layer of lanthanum nickel oxide (LNO) on the nickel foil by chemical solution deposition prior to the PLZT deposition. Use of the LNO buffer allowed high-quality film-on-foil capacitors to be prepared at high temperatures in air. With the AFE PLZT deposited on LNO-buffered Ni foils, we observed field-induced phase transformations of AFE to ferroelectric (FE). The AFE-to-FE phase transition field, E(AF) = 260 kV cm(-1), and the reverse phase transition field, E(FA) = 220 kVcm(-1), were measured at room temperature on a similar to 1.15 mu m thick PLZT film grown on LNO-buffered Ni foils. The relative permittivities of the AFE and FE states were similar to 530 and similar to 740, respectively, with dielectric loss < 0.05 at room temperature. P-E hysteresis loop measured at room temperature confirmed the field-induced phase transition. The time-relaxation current density was investigated under various applied electric fields. The leakage current density of a 1.15 mu m thick AFE PLZT film-on-foil capacitor was 5 x 10(-9) Acm(-2) at room temperature under 87 kV cm(-1) applied field. The breakdown behaviour of the AFE PLZT film-on-foil capacitors was studied by Weibull analysis. The mean breakdown time decreased exponentially with increasing applied field. The mean breakdown time was over 610 s when a field of 1.26MVcm(-1) was applied to a 1.15 mu m thick AFE PLZT film-on-foil capacitor.
C1 [Ma, Beihai; Kwon, Do-Kyun; Narayanan, Manoj; Balachandran, U. (Balu)] Argonne Natl Lab, Div Energy Syst, Argonne, IL 60439 USA.
RP Ma, BH (reprint author), Argonne Natl Lab, Div Energy Syst, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM bma@anl.gov
RI Narayanan, Manoj/A-4622-2011; Ma, Beihai/I-1674-2013
OI Ma, Beihai/0000-0003-3557-2773
FU US Department of Energy, Office of Vehicle Technologies Program
[DE-AC020-6CH11357]
FX Work funded by the US Department of Energy, Office of Vehicle
Technologies Program, under Contract DE-AC020-6CH11357. This work
benefited from the use of the Electron Microscopy Center (EMC) at
Argonne National Laboratory. The authors thank Dr R E Koritala at EMC
for her assistance with scanning electron microscopy.
NR 28
TC 20
Z9 20
U1 1
U2 21
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 OCT 21
PY 2008
VL 41
IS 20
AR 205003
DI 10.1088/0022-3727/41/20/205003
PG 7
WC Physics, Applied
SC Physics
GA 361ML
UT WOS:000260131700010
ER
PT J
AU Kharlampieva, E
Kozlovskaya, V
Ankner, JF
Sukhishvili, SA
AF Kharlampieva, Eugenia
Kozlovskaya, Veronika
Ankner, John F.
Sukhishvili, Svetlana A.
TI Hydrogen-Bonded Polymer Multilayers Probed by Neutron Reflectivity
SO LANGMUIR
LA English
DT Article
ID POLYELECTROLYTE MULTILAYERS; MOLECULAR-WEIGHT; LAYER; FILMS;
POLY(N-ISOPROPYLACRYLAMIDE); WATER; TEMPERATURE; REFLECTOMETRY;
NANOPARTICLE; PH
AB We present a neutron reflectivity study of the internal structure of multilayers made of a weak polyelectrolyte and a neutral component where interactions between adjacent layers are controlled by hydrogen-bonding. We found the degree of interpenetration of polymer layers expressed as the interlayer roughness to be strongly correlated with the strength of intermolecular interactions between the adjacent layers. In addition, polymer layers become more diffuse with a distance from the substrate. Our results demonstrate that hydrogen-bonded films exhibit a close correlation between their structure and properties, which is essential for various applications.
C1 [Kharlampieva, Eugenia; Kozlovskaya, Veronika; Sukhishvili, Svetlana A.] Stevens Inst Technol, Dept Chem & Chem Biol, Hoboken, NJ 07030 USA.
[Ankner, John F.] Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA.
RP Sukhishvili, SA (reprint author), Stevens Inst Technol, Dept Chem & Chem Biol, Hoboken, NJ 07030 USA.
EM ssukhish@stevens.edu
OI Ankner, John/0000-0002-6737-5718
NR 30
TC 38
Z9 38
U1 5
U2 19
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD OCT 21
PY 2008
VL 24
IS 20
BP 11346
EP 11349
DI 10.1021/la802502c
PG 4
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 360HT
UT WOS:000260049300007
PM 18816021
ER
PT J
AU Sun, YG
Lei, CH
Gosztola, D
Haasch, R
AF Sun, Yugang
Lei, Changhui
Gosztola, David
Haasch, Rick
TI Formation of Oxides and Their Role in the Growth of Ag Nanoplates on
GaAs Substrates
SO LANGMUIR
LA English
DT Article
ID SOLAR-ENERGY CONVERSION; INHOMOGENEOUS SCHOTTKY BARRIERS; ENHANCED
RAMAN-SCATTERING; THIN-FILM GROWTH; REPLACEMENT REACTION;
PHOTOELECTROCHEMICAL CELLS; SEMICONDUCTOR SURFACES; GALVANIC
DISPLACEMENT; METAL NANOSTRUCTURES; ELECTRON-MICROSCOPY
AB Simple galvanic reactions between highly doped n-type GaAs wafers and a pure aqueous solution of AgNO3 at room temperature provide an easy and efficient protocol to directly deposit uniform Ag nanoplates with tunable dimensions on the GaAs substrates. The anisotropic growth of the Ag nanoplates in the absence of surfactant molecules might be partially ascribed to the codeposition of oxides of gallium and arsenic, which are revealed by extensive data from electron microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy, during the growth of the Ag nanoplates. The electron microscopic characterization shows that each Ag nanoplate has a "necked" geometry, that is, it pins on the GaAs lattices through only a tiny neck (with sizes of < 10 nm). In addition, the as-grown Ag nanoplates exhibit strong enhancement toward Raman scattering of materials on (or around) their surfaces.
C1 [Sun, Yugang; Gosztola, David] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
[Lei, Changhui; Haasch, Rick] Univ Illinois, Ctr Microanal Mat, Frederick Seitz Mat Res Lab, Urbana, IL 61801 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 Gosztola, David/D-9320-2011; Sun, Yugang /A-3683-2010
OI Gosztola, David/0000-0003-2674-1379; Sun, Yugang /0000-0001-6351-6977
FU U.S. Department of Energy [DEFG02-91-ER45439]; Office of Science; Office
of Basic Energy Sciences [DE-AC02-06CH11357]
FX The submitted manuscript has been created by UChicago Argonne, LLC,
Operator of Argonne National Laboratory ("Argonne"). Argonne, a U.S.
Department of Energy Office of Science laboratory, is operated under
Contract No. DE-AC02-06CH11357. Use of the Center for Nanoscale
Materials and the Electron Microscopy Center for Materials Research at
Argonne was supported by the U.S. Department of Energy, Office of
Science, Office of Basic Energy Sciences, under Contract No.
DE-AC02-06CH11357. Characterizations were also carried out by partially
using the Center for Microanalysis of Materials Facilities in Frederick
Seitz Materials Research Laboratory, University of Illinois, which is
partially supported by the U.S. Department of Energy under Grant No.
DEFG02-91-ER45439.
NR 57
TC 15
Z9 15
U1 1
U2 15
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD OCT 21
PY 2008
VL 24
IS 20
BP 11928
EP 11934
DI 10.1021/la801698s
PG 7
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 360HT
UT WOS:000260049300082
PM 18788821
ER
PT J
AU Budhlall, BM
Marquez, M
Velev, OD
AF Budhlall, Bridgette M.
Marquez, Manuel
Velev, Orlin D.
TI Microwave, Photo- and Thermally Responsive PNIPAm-Gold Nanoparticle
Microgels
SO LANGMUIR
LA English
DT Article
ID POLY-N-ISOPROPYLACRYLAMIDE; INTERNAL PHASE-SEPARATION; SHELL
MICROCAPSULES; EMULSION DROPLETS; HOLLOW SPHERES; ASSISTED SYNTHESIS;
LATEX-PARTICLES; RELEASE; NANOCONTAINERS; MICROSPHERES
AB Microwave-, photo- and thermo-responsive polymer microgels that range in size from 500 to 800 urn and are swollen with water were prepared by a novel microarray technique. We used a liquid-liquid dispersion technique in a system of three immiscible liquids to prepare hybrid PNIPAm-co-AM core-shell capsules loaded with AuNPs. The spontaneous encapsulation is a result of the formation of double oil-in-water-in-oil (o/w/o) emulsion. It is facilitated by adjusting the balance of the interfacial tensions between the aqueous phase (in which a water-soluble drug may be dissolved), the monomer phase and the continuous phase. The water-in-oil (w/o) droplets containing 26 wt% NIPAm and Am monomers, 0.1 wt% Tween-80 surfactant, FITC fluorescent dye and colloidal gold nanoparticles spontaneously developed a core-shell morphology that was fixed by in situ photopolymerization. The results demonstrate new reversibly swelling and deswelling AuNP/PNIPAm hybrid core-shell microcapsules and microgels that can be actuated by visible light and/or microwave radiation (<= 1250nm) and/or temperature. This is the first study to demonstrate that incorporating AuNPs speeds up the response kinetics of PNIPAm, and hence enhances the sensitivity to external stimuli of PNIPAm. These microgels can have potential applications for microfluidic switches or microactuators, photosensors, and various nanomedicine applications in controlled delivery and release.
C1 [Budhlall, Bridgette M.] Univ Massachusetts, NSF Funded Ctr High Rate Nanomfg, Lowell, MA 01854 USA.
[Budhlall, Bridgette M.] Univ Massachusetts, Nanomfg Ctr Excellence, Dept Engn Phys, Lowell, MA 01854 USA.
[Budhlall, Bridgette M.; Velev, Orlin D.] N Carolina State Univ, Dept Chem & Biomol Engn, Raleigh, NC 27695 USA.
[Budhlall, Bridgette M.; Marquez, Manuel] NIST, Ctr Theoret & Computat Nanosci, Gaithersburg, MD 20899 USA.
[Budhlall, Bridgette M.; Marquez, Manuel] Arizona State Univ, Harrington Dept Bioengn, Tempe, AZ USA.
[Budhlall, Bridgette M.; Marquez, Manuel] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA.
RP Budhlall, BM (reprint author), Univ Massachusetts, NSF Funded Ctr High Rate Nanomfg, Lowell, MA 01854 USA.
EM bridgette_budhlall@uml.edu; odvelev@unity.ncsu.edu
FU University of Massachusetts, Lowell; International Network of Emerging
Science and Technology Group; Phillip Morris USA
FX B.M.B. acknowledges the University of Massachusetts, Lowell, for
granting time to work with Prof. Velev, International Network of
Emerging Science and Technology Group, Phillip Morris USA for funding,
Emily Hon (undergraduate student), Suk-Tai Chang and Ketan Bhatt
(graduate students) for performing some of the experiments and providing
training on the confocal microscope, respectively.
NR 66
TC 50
Z9 53
U1 8
U2 132
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD OCT 21
PY 2008
VL 24
IS 20
BP 11959
EP 11966
DI 10.1021/la8019556
PG 8
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 360HT
UT WOS:000260049300087
PM 18817426
ER
PT J
AU Uplegger, L
AF Uplegger, Lorenzo
CA CMS Collaboration
TI Status of the CMS pixel project
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE Semiconductor detector; Pixel
ID DETECTOR; SENSORS
AB The Compact Muon Solenoid Experiment (CMS) will start taking data at the Large Hadron Collider (LHC) in 2008. The closest detector to the interaction point is the silicon pixel detector which is the heart of the tracking system. It consists of three barrel layers and two pixel disks on each side of the interaction point for a total of 66 million channels. Its proximity to the interaction point means there will be very large particle fluences and therefore a radiation-tolerant design is necessary. The pixel detector will be crucial to achieve a good vertex resolution and will play a key role in pattern recognition and track reconstruction. The results from test beam runs prove that the expected performances can be achieved. The detector is currently being assembled and will be ready for insertion into CMS in early 2008. During the assembly phase, a thorough electronic test is being done to check the functionality of each channel to guarantee the performance required to achieve the physics goals. This report will present the final detector design, the status of the production as well as results from test beam runs to validate the expected performance. Published by Elsevier B.V.
C1 [Uplegger, Lorenzo; CMS Collaboration] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Uplegger, L (reprint author), Fermilab Natl Accelerator Lab, POB 500,Wilson Rd, Batavia, IL 60510 USA.
EM uplegger@fnat.gov
NR 6
TC 0
Z9 0
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 OCT 21
PY 2008
VL 596
IS 1
BP 63
EP 65
DI 10.1016/j.nima.2008.07.138
PG 3
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 378KS
UT WOS:000261320200016
ER
PT J
AU Bonechi, L
Adriani, O
Bongi, M
Castellini, G
D'Alessandro, R
Faus, A
Haguenauer, M
Itow, Y
Kasahara, K
Macina, D
Mase, T
Masuda, K
Matsubara, Y
Matsumoto, H
Menjo, H
Mizuishi, M
Muraki, Y
Papini, P
Perrot, AL
Ricciarini, S
Sako, T
Shimizu, Y
Tamura, T
Torii, S
Tricomi, A
Turner, WC
Velasco, J
Watanabe, H
Yoshida, K
AF Bonechi, L.
Adriani, O.
Bongi, M.
Castellini, G.
D'Alessandro, R.
Faus, A.
Haguenauer, M.
Itow, Y.
Kasahara, K.
Macina, D.
Mase, T.
Masuda, K.
Matsubara, Y.
Matsumoto, H.
Menjo, H.
Mizuishi, M.
Muraki, Y.
Papini, P.
Perrot, A. L.
Ricciarini, S.
Sako, T.
Shimizu, Y.
Tamura, T.
Torii, S.
Tricomi, A.
Turner, W. C.
Velasco, J.
Watanabe, H.
Yoshida, K.
TI Production and test of the LHCf microstrip silicon system
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE LHC forward physics; Calorimeter; Microstrip silicon tracker
AB After a preliminary installation test, successfully performed in 2007, both the detectors of the LHCf experiment are now ready to be installed at the CERN LHC accelerator for the first physics run. A beam test at SPS in September 2007 allowed to verify the performance of the apparata. Production and test of the silicon tracker developed for one of them are shortly discussed in this work. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Bonechi, L.; Adriani, O.; Bongi, M.; D'Alessandro, R.; Papini, P.; Ricciarini, S.] Ist Nazl Fis Nucl, Sect Florence, Florence, Italy.
[Bonechi, L.; Adriani, O.; Bongi, M.; D'Alessandro, R.] Univ Florence, I-50121 Florence, Italy.
[Tricomi, A.] Ist Nazl Fis Nucl, Sect Catania, Catania, Italy.
[Tricomi, A.] Univ Catania, I-95124 Catania, Italy.
[Castellini, G.] IFAC CNR, Florence, Italy.
[Faus, A.; Velasco, J.] Ctr Mixto CSIC UVEG, IFIC, Valencia, Spain.
[Haguenauer, M.] Ecole Polytech, Palaiseau, France.
[Itow, Y.; Mase, T.; Masuda, K.; Matsubara, Y.; Matsumoto, H.; Menjo, H.; Sako, T.; Watanabe, H.] Nagoya Univ, Solar Terr Environm Lab, Nagoya, Aichi 4648601, Japan.
[Tamura, T.] Kanagawa Univ, Kanagawa, Japan.
[Kasahara, K.; Mizuishi, M.; Shimizu, Y.; Torii, S.] Waseda Univ, RISE, Tokyo, Japan.
[Turner, W. C.] LBNL, Berkeley, CA USA.
[Muraki, Y.] Konan Univ, Kobe, Hyogo, Japan.
[Macina, D.; Perrot, A. L.] CERN, Geneva, Switzerland.
RP Bonechi, L (reprint author), Ist Nazl Fis Nucl, Sect Florence, Florence, Italy.
EM lorenzo.bonechi@fl.infn.it
RI Masuda, Kimiaki/M-4932-2014; D'Alessandro, Raffaello/F-5897-2015; Bongi,
Massimo/L-9417-2015;
OI D'Alessandro, Raffaello/0000-0001-7997-0306; Bongi,
Massimo/0000-0002-6050-1937; Tricomi, Alessia Rita/0000-0002-5071-5501;
Ricciarini, Sergio Bruno/0000-0001-6176-3368; Castellini,
Guido/0000-0002-0177-0643; Papini, Paolo/0000-0003-4718-2895
NR 4
TC 1
Z9 1
U1 1
U2 2
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 OCT 21
PY 2008
VL 596
IS 1
BP 85
EP 87
DI 10.1016/j.nima.2008.07.122
PG 3
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 378KS
UT WOS:000261320200021
ER
PT J
AU Badala, A
Blanco, F
La Rocca, P
Librizzi, F
Pappalardo, GS
Pulvirenti, A
Riggi, F
Vernet, R
Awes, TC
Muller, H
Tupikin, N
AF Badala, A.
Blanco, F.
La Rocca, P.
Librizzi, F.
Pappalardo, G. S.
Pulvirenti, A.
Riggi, F.
Vernet, R.
Awes, T. C.
Muller, H.
Tupikin, N.
TI Characterization of avalanche photodiodes (APDs) for the electromagnetic
calorimeter in the ALICE experiment
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE Photosensor; Silicon avalanche photodiode; APD; Electromagnetic
calorimeter
AB The Electromagnetic Calorimeter (EMCal) of the ALICE experiment at LHC will extensively make use of avalanche photodiodes (APDs) for the readout of scintillation light. The large sensitive area, high quantum efficiency and low dark current make this type of photosensors well-suited for the EMCal requirements. A testing activity is currently in progress in order to characterize the main properties of these APDs and find the best working conditions. Fundamental tasks are the individual test of all APDs after presetting their nominal gain via the bias control and the study of APD gain coefficients as a function of the applied bias voltage and temperature. An overview of the adopted procedure will be presented, together with a description of preliminary results obtained on a first sample of APDs during the testing activity. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Badala, A.; Blanco, F.; La Rocca, P.; Librizzi, F.; Pappalardo, G. S.; Pulvirenti, A.; Riggi, F.] Ist Nazl Fis Nucl, Sez Catania, Catania, Italy.
[Blanco, F.; La Rocca, P.; Pulvirenti, A.; Riggi, F.] Univ Catania, Dept Phys & Astron, Catania, Italy.
[Vernet, R.] Consortzio Cometa, Catania, Italy.
[Awes, T. C.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
[Muller, H.] CERN, CH-1211 Geneva 23, Switzerland.
[Tupikin, N.] RRC Kurchatov Inst, Moscow, Russia.
RP La Rocca, P (reprint author), Ist Nazl Fis Nucl, Sez Catania, Catania, Italy.
EM paola.larocca@ct.infn.it
OI Riggi, Francesco/0000-0002-0030-8377
NR 9
TC 2
Z9 2
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
EI 1872-9576
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD OCT 21
PY 2008
VL 596
IS 1
BP 122
EP 125
DI 10.1016/j.nima.2008.07.133
PG 4
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 378KS
UT WOS:000261320200030
ER
PT J
AU Andre, I
Strauss, CEM
Kaplan, DB
Bradley, P
Baker, D
AF Andre, Ingemar
Strauss, Charlie E. M.
Kaplan, David B.
Bradley, Philip
Baker, David
TI Emergence of symmetry in homooligomeric biological assemblies
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE evolution; protein structure; Monte Carlo Simulation; modeling
ID ENERGY LANDSCAPES; PROTEINS; MODEL
AB Naturally occurring homooligomeric protein complexes exhibit striking internal symmetry. The evolutionary origins of this symmetry have been the subject of considerable speculation; proposals for the advantages associated with symmetry include greater folding efficiency, reduced aggregation, amenability to allosteric regulation, and greater adaptability. An alternative possibility stems from the idea that to contribute to fitness, and hence be subject to evolutionary optimization, a complex must be significantly populated, which implies that the interaction energy between monomers in the ancestors of modern-day complexes must have been sufficient to at least partially overcome the entropic cost of association. Here, we investigate the effects of this bias toward very-low-energy complexes on the distribution of symmetry in primordial homooligomers modeled as randomly interacting pairs of monomers. We demonstrate quantitatively that a bias toward very-low-energy complexes can result in the emergence of symmetry from random ensembles in which the overall frequency of symmetric complexes is vanishingly small. This result is corroborated by using explicit protein-protein docking calculations to generate ensembles of randomly docked complexes: the fraction of these that are symmetric increases from 0.02% in the overall population to >50% in very low energy subpopulations.
C1 [Andre, Ingemar; Baker, David] Univ Washington, Dept Biochem, Seattle, WA 98195 USA.
[Strauss, Charlie E. M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Kaplan, David B.] Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA.
[Bradley, Philip] Fred Hutchinson Canc Res Ctr, Seattle, WA 98109 USA.
[Baker, David] Univ Washington, Howard Hughes Med Inst, Seattle, WA 98195 USA.
RP Baker, D (reprint author), Univ Washington, Dept Biochem, Seattle, WA 98195 USA.
EM dabaker@u.washington.edu
RI Andre, Ingemar/O-4777-2014; Baker, David/K-8941-2012;
OI Andre, Ingemar/0000-0002-4753-8233; Baker, David/0000-0001-7896-6217;
Kaplan, David/0000-0001-5141-8245
FU Knut and Alice Wallenberg Foundation; Defense Threat Reduction Agency
[MIPR7K08970172]; Spanish MEC [SA62006-0089, FPA2006-05423]; Comunidad
de Madrid HEPHACOS; Department of Energy [DE-FG02-OOER41132]; National
Institutes of Health; Howard Hughes Medical Institute
FX We thank Ora Schueler-Furman, John Moult, Rhiju Das, and David Eisenberg
for stimulating conversations about the origin of symmetry. This work
was supported by a Knut and Alice Wallenberg Foundation postdoctoral
fellowship (to I-A), by Defense Threat Reduction Agency Contract
MIPR7K08970172 (to C.E.M.S.), in part by Spanish MEC grant SA62006-0089
and project FPA2006-05423 (to D.B.K.), by the regional Comunidad de
Madrid HEPHACOS project (D.B.K.), and by Department of Energy Grant
DE-FG02-OOER41132 (to D.B.K.), and by the National Institutes of Health
and Howard Hughes Medical Institute.
NR 16
TC 78
Z9 79
U1 3
U2 15
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 OCT 21
PY 2008
VL 105
IS 42
BP 16148
EP 16152
DI 10.1073/pnas.0807576105
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 368BX
UT WOS:000260597400017
PM 18849473
ER
PT J
AU Leary, RJ
Lin, JC
Cummins, J
Boca, S
Wood, LD
Parsons, DW
Jones, S
Sjoblom, T
Park, BH
Parsons, R
Willis, J
Dawson, D
Willson, JKV
Nikolskaya, T
Nikolsky, Y
Kopelovich, L
Papadopoulos, N
Pennacchio, LA
Wang, TL
Markowitz, SD
Parmigiani, G
Kinzler, KW
Vogelstein, B
Velculescu, VE
AF Leary, Rebecca J.
Lin, Jimmy C.
Cummins, Jordan
Boca, Simina
Wood, Laura D.
Parsons, D. Williams
Jones, Sian
Sjoeblom, Tobias
Park, Ben-Ho
Parsons, Ramon
Willis, Joseph
Dawson, Dawn
Willson, James K. V.
Nikolskaya, Tatiana
Nikolsky, Yuri
Kopelovich, Levy
Papadopoulos, Nick
Pennacchio, Len A.
Wang, Tian-Li
Markowitz, Sanford D.
Parmigiani, Giovanni
Kinzler, Kenneth W.
Vogelstein, Bert
Velculescu, Victor E.
TI Integrated analysis of homozygous deletions, focal amplifications, and
sequence alterations in breast and colorectal cancers
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE amplification; copy number changes; Digital Karyotyping; high-density
SNP arrays; homozygous deletion
ID CANDIDATE TUMOR-SUPPRESSOR; NUCLEOTIDE POLYMORPHISM ARRAYS; COPY NUMBER
ANALYSIS; GENETIC ALTERATIONS; HUMAN GENOME; RESOLUTION; LEUKEMIA;
THERAPY; SITES
AB we have performed a genome-wide analysis of copy number changes in breast and colorectal tumors using approaches that can reliably detect homozygous deletions and amplifications. We found that the number of genes altered by major copy number changes, deletion of all copies or amplification to at least 12 copies per cell, averaged 17 per tumor. We have integrated these data with previous mutation analyses of the Reference Sequence genes in these same tumor types and have identified genes and cellular pathways affected by both copy number changes and point alterations. Pathways enriched for genetic alterations included those controlling cell adhesion, intracellular signaling, DNA topological change, and cell cycle control. These analyses provide an integrated view of copy number and sequencing alterations on a genome-wide scale and identify genes and pathways that could prove useful for cancer diagnosis and therapy.
C1 [Leary, Rebecca J.; Lin, Jimmy C.; Cummins, Jordan; Boca, Simina; Wood, Laura D.; Parsons, D. Williams; Jones, Sian; Sjoeblom, Tobias; Papadopoulos, Nick; Wang, Tian-Li; Parmigiani, Giovanni; Kinzler, Kenneth W.; Vogelstein, Bert; Velculescu, Victor E.] Johns Hopkins Kimmel Canc Ctr, Ludwig Ctr Canc Genet & Therapeut, Baltimore, MD 21231 USA.
[Leary, Rebecca J.; Lin, Jimmy C.; Cummins, Jordan; Boca, Simina; Wood, Laura D.; Parsons, D. Williams; Jones, Sian; Sjoeblom, Tobias; Papadopoulos, Nick; Wang, Tian-Li; Parmigiani, Giovanni; Kinzler, Kenneth W.; Vogelstein, Bert; Velculescu, Victor E.] Johns Hopkins Kimmel Canc Ctr, Howard Hughes Med Inst, Baltimore, MD 21231 USA.
[Boca, Simina; Parmigiani, Giovanni] Johns Hopkins Kimmel Canc Ctr, Dept Bioinformat, Baltimore, MD 21231 USA.
[Boca, Simina; Parmigiani, Giovanni] Johns Hopkins Kimmel Canc Ctr, Dept Pathol, Baltimore, MD 21231 USA.
[Park, Ben-Ho] Sidney Kimmel Comprehens Canc Ctr Johns Hopkins, Baltimore, MD 21231 USA.
[Parsons, Ramon] Columbia Univ, Inst Canc Genet, New York, NY 10032 USA.
[Willis, Joseph; Dawson, Dawn; Markowitz, Sanford D.] Case Western Reserve Univ, Dept Med, Cleveland, OH 44106 USA.
[Willis, Joseph; Dawson, Dawn; Markowitz, Sanford D.] Case Western Reserve Univ, Ireland Canc Ctr, Cleveland, OH 44106 USA.
[Willis, Joseph; Dawson, Dawn; Markowitz, Sanford D.] Univ Hosp Cleveland, Cleveland, OH 44106 USA.
[Willis, Joseph; Dawson, Dawn; Markowitz, Sanford D.] Howard Hughes Med Inst, Cleveland, OH 44106 USA.
[Willson, James K. V.] Univ Texas SW Med Ctr Dallas, Harold C Simmons Comprehens Canc Ctr, Dallas, TX 75390 USA.
[Nikolskaya, Tatiana] NI Vavilov Gen Genet Res Inst, Moscow 117809, Russia.
[Nikolskaya, Tatiana; Nikolsky, Yuri] GeneGo Inc, St Joseph, MI 49085 USA.
[Kopelovich, Levy] NCI, Canc Prevent Div, Bethesda, MD 20892 USA.
[Pennacchio, Len A.] Joint Genome Inst, Dept Energy, Walnut Creek, CA 94598 USA.
RP Vogelstein, B (reprint author), Johns Hopkins Kimmel Canc Ctr, Ludwig Ctr Canc Genet & Therapeut, Baltimore, MD 21231 USA.
EM velculescu@jhmi.edu
RI Jones, Sian/A-5050-2012; Papadopoulos, Nickolas/K-7272-2012; Nikolskaya,
Tatiana/M-5008-2013
FU Virginia and D. K. Ludwig Fund for Cancer Research; National Institutes
of Health [CA121113, CA 57345, CA 43460, CA 109274]; National Cancer
Institute Division of Cancer Prevention [HHSN261200433002C]; Pew
Charitable Trusts; Avon Foundation
FX We thank R. Ashworth and A. Scott for assistance with Illumina analyses,
S. Bentivegna for assistance with DK, D. H. Nguyen for the artwork in
Fig. 2, and M. Newton for sharing software for non-id Bernoulli
calculations. This work was supported by the Virginia and D. K. Ludwig
Fund for Cancer Research; National Institutes of Health Grants CA121113,
CA 57345, CA 43460, and CA 109274; National Cancer Institute Division of
Cancer Prevention Contract HHSN261200433002C; the Pew Charitable Trusts,
and the Avon Foundation.
NR 41
TC 170
Z9 173
U1 3
U2 14
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 OCT 21
PY 2008
VL 105
IS 42
BP 16224
EP 16229
DI 10.1073/pnas.0808041105
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 368BX
UT WOS:000260597400030
PM 18852474
ER
PT J
AU Vereecken, H
Huisman, JA
Bogena, H
Vanderborght, J
Vrugt, JA
Hopmans, JW
AF Vereecken, H.
Huisman, J. A.
Bogena, H.
Vanderborght, J.
Vrugt, J. A.
Hopmans, J. W.
TI On the value of soil moisture measurements in vadose zone hydrology: A
review
SO WATER RESOURCES RESEARCH
LA English
DT Review
ID GROUND-PENETRATING RADAR; ROOT WATER-UPTAKE; SOUTHERN GREAT-PLAINS;
ENSEMBLE KALMAN FILTER; SEQUENTIAL DATA ASSIMILATION; REMOTE-SENSING
FOOTPRINTS; ELECTRICAL-RESISTIVITY TOMOGRAPHY; IMPROVED CAPACITANCE
TECHNIQUE; TIME-DOMAIN REFLECTOMETRY; NEAR-SURFACE MEASUREMENTS
AB We explore and review the value of soil moisture measurements in vadose zone hydrology with a focus on the field and catchment scales. This review is motivated by the increasing ability to measure soil moisture with unprecedented spatial and temporal resolution across scales. We highlight and review the state of the art in using soil moisture measurements for (1) estimation of soil hydraulic properties, (2) quantification of water and energy fluxes, and (3) retrieval of spatial and temporal dynamics of soil moisture profiles. We argue for the urgent need to have access to field monitoring sites and databases that include detailed information about variability of hydrological fluxes and parameters, including their upscaled values. In addition, improved data assimilation methods are needed that fully exploit the information contained in soil moisture data. The development of novel upscaling methods for predicting effective moisture fluxes and disaggregation schemes toward integrating large-scale soil moisture measurements in hydrological models will increase the value of soil moisture measurements. Finally, we recognize a need to develop strategies that combine hydrogeophysical measurement techniques with remote sensing methods.
C1 [Vereecken, H.; Huisman, J. A.; Bogena, H.; Vanderborght, J.] Forschungszentrum Julich, Inst Chem & Dynam Geosphere, Agrosphere Inst,ICG4, D-52485 Julich, Germany.
[Vrugt, J. A.] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
[Hopmans, J. W.] Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 USA.
RP Vereecken, H (reprint author), Forschungszentrum Julich, Inst Chem & Dynam Geosphere, Agrosphere Inst,ICG4, D-52485 Julich, Germany.
EM h.vereecken@fz-juelich.de
RI Vrugt, Jasper/C-3660-2008; Huisman, J.A. (Sander)/I-7078-2012;
OI Bogena, Heye/0000-0001-9974-6686; Huisman, Johan
Alexander/0000-0002-1327-0945; Vanderborght, Jan/0000-0001-7381-3211
FU LANL postdoctoral program
FX The fifth author is supported by a J. Robert Oppenheimer Fellowship from
the LANL postdoctoral program.
NR 297
TC 188
Z9 191
U1 30
U2 189
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 OCT 21
PY 2008
VL 44
AR W00D06
DI 10.1029/2008WR006829
PG 21
WC Environmental Sciences; Limnology; Water Resources
SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water
Resources
GA 365ER
UT WOS:000260389200001
ER
PT J
AU Ahn, KS
Yan, Y
Shet, S
Jones, K
Deutsch, T
Turner, J
Al-Jassim, M
AF Ahn, Kwang-Soon
Yan, Yanfa
Shet, Sudhakar
Jones, Kim
Deutsch, Todd
Turner, John
Al-Jassim, Mowafak
TI ZnO nanocoral structures for photoelectrochemical cells
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID SENSITIZED SOLAR-CELLS; TIO2 NANOTUBES; FILMS; GROWTH; PHOTOCATALYSIS;
ENHANCEMENT; ELECTRODES; NANOWIRES; NANORODS
AB We report on synthesis of a uniform and large area of a new form of ZnO nanocorals. These nanostructures can provide suitable electrical pathways for efficient carrier collection as well as large surface areas for the photoelectrochemical (PEC) cells. PEC devices made from these ZnO nanocoral structures demonstrate significantly enhanced photoresponse as compared to ZnO compact and nanorod films. Our results suggest that the nanocoral structures could be an excellent choice for nanomaterial-based applications such as dye-sensitized solar cells, electrochromic windows, and batteries. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3002282].
C1 [Ahn, Kwang-Soon; Yan, Yanfa; Shet, Sudhakar; Jones, Kim; Deutsch, Todd; Turner, John; Al-Jassim, Mowafak] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Ahn, KS (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM kwang-soon_ahn@nrel.gov
RI Dom, Rekha/B-7113-2012;
OI Deutsch, Todd/0000-0001-6577-1226
FU U. S. Department of Energy through the UNLV Research Foundation
FX This work was supported by the U. S. Department of Energy through the
UNLV Research Foundation.
NR 25
TC 55
Z9 56
U1 2
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD OCT 20
PY 2008
VL 93
IS 16
AR 163117
DI 10.1063/1.3002282
PG 3
WC Physics, Applied
SC Physics
GA 365CO
UT WOS:000260383700063
ER
PT J
AU Arenholz, E
van der Laan, G
Nolting, F
AF Arenholz, Elke
van der Laan, Gerrit
Nolting, Frithjof
TI Magnetic structure near the Co/NiO(001) interface
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID PHOTOELECTRON MICROSCOPY; FERROMAGNET; SURFACE; FILMS
AB We investigate the magnetic coupling at the Co/NiO interface using soft x-ray magnetic linear dichroism (XMLD) and circular dichroism taking explicitly into account the recently observed angular dependence of the XMLD with respect to the crystallographic axes. We find that the Co moments are aligned perpendicular to the NiO moments. We discuss the impact of the anisotropic XMLD on the intensity ratio of the two peaks at the Ni L(2) edge, which is commonly employed to determine the spin orientation in antiferromagnets using XMLD. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3005643]
C1 [Arenholz, Elke] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
[van der Laan, Gerrit] Diamond Light Source, Didcot OX11 0DE, Oxon, England.
[Nolting, Frithjof] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland.
RP Arenholz, E (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
EM earenholz@lbl.gov
RI van der Laan, Gerrit/Q-1662-2015
OI van der Laan, Gerrit/0000-0001-6852-2495
FU Director, Office of Science, Office of Basic Energy Sciences, of the U.
S. Department of Energy [DE-AC02-05CH11231]
FX 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-AC02-05CH11231. The authors thank Andreas
Scholl for the
NR 17
TC 14
Z9 14
U1 0
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD OCT 20
PY 2008
VL 93
IS 16
AR 162506
DI 10.1063/1.3005643
PG 3
WC Physics, Applied
SC Physics
GA 365CO
UT WOS:000260383700038
ER
PT J
AU Choudhury, S
Zhang, JX
Li, YL
Chen, LQ
Jia, QX
Kalinin, SV
AF Choudhury, S.
Zhang, J. X.
Li, Y. L.
Chen, L. Q.
Jia, Q. X.
Kalinin, S. V.
TI Effect of ferroelastic twin walls on local polarization switching:
Phase-field modeling
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID FERROELECTRIC DOMAIN-STRUCTURES; THIN-FILMS; FORCE MICROSCOPY;
SIMULATIONS; EVOLUTION; REVERSAL
AB Local polarization switching in epitaxial ferroelectric thin films in the presence of ferroelastic domain walls was studied using phase-field approach. The nucleation bias profile across a twin wall was analyzed, and the localization of preferential nucleation sites was established. This analysis was further extended to a realistic domain structure with multiple twin boundaries. It was observed that the local nucleation voltage required for a 180 degrees domain switching is closely related to the number of such local defects. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2993330]
C1 [Choudhury, S.; Zhang, J. X.; Li, Y. L.; Chen, L. Q.] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA.
[Jia, Q. X.] Los Alamos Natl Lab, MPA STC, Los Alamos, NM 87545 USA.
[Kalinin, S. V.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Kalinin, S. V.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Choudhury, S (reprint author), Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA.
EM sxc398@psu.edu
RI Choudhury, Samrat/B-4115-2009; Zhang, Jingxian/B-2253-2010; Jia, Q.
X./C-5194-2008; Kalinin, Sergei/I-9096-2012; Chen, LongQing/I-7536-2012
OI Kalinin, Sergei/0000-0001-5354-6152; Chen, LongQing/0000-0003-3359-3781
FU NSF [DMR-0507146, DMR-0820404]; Department of Energy [DOE
DE-FG02-07ER46417]; Division of Materials Sciences and Engineering;
Office of Basic Energy Sciences
FX We are grateful for the financial supports from NSF under Contract Nos.
DMR-0507146 and DMR-0820404 (S. C., J. X. Z., and L. Q. C.) and from the
Department of Energy under the Grant No. DOE DE-FG02-07ER46417 (Chen).
Research was sponsored in part (S. V. K.) by the Division of Materials
Sciences and Engineering, Office of Basic Energy Sciences, U. S.
Department of Energy with Oak Ridge National Laboratory, managed and
operated by UT-Battelle, LLC. The work at Los Alamos National Laboratory
was supported by the U. S. Department of Energy (DOE) through the LANL/
LDRD Program.
NR 21
TC 14
Z9 14
U1 2
U2 23
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 OCT 20
PY 2008
VL 93
IS 16
AR 162901
DI 10.1063/1.2993330
PG 3
WC Physics, Applied
SC Physics
GA 365CO
UT WOS:000260383700043
ER
PT J
AU Fluegel, B
Mascarenhas, A
AF Fluegel, B.
Mascarenhas, A.
TI Aberration-free imaging for light and electrons
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID REFRACTION
AB The equations for refraction of either the extraordinary wave of light or the wavefunction of an electron at a planar boundary between two misoriented uniaxially anisotropic materials are shown via raytracing to yield a transverse displacement of the object point. The displacement is independent of ray incidence angle and is thus free from spherical aberration, yielding a perfect virtual image which can have applications in birefringent optics. The general conditions for this aberration-free imaging are found to be identical to those required for amphoteric total refraction. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3005582]
C1 [Fluegel, B.; Mascarenhas, A.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Fluegel, B (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM brian_fluegel@nrel.gov
FU Department of Energy Office of Science, Basic Energy Sciences
[DE-AC36-83CH10093]
FX We acknowledge the financial support of the Department of Energy Office
of Science, Basic Energy Sciences under Grant No. DE-AC36-83CH10093.
NR 11
TC 2
Z9 3
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 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD OCT 20
PY 2008
VL 93
IS 16
AR 161105
DI 10.1063/1.3005582
PG 3
WC Physics, Applied
SC Physics
GA 365CO
UT WOS:000260383700005
ER
PT J
AU Huang, EW
Liaw, PK
Porcar, L
Liu, Y
Liu, YL
Kai, JJ
Chen, WR
AF Huang, E-Wen
Liaw, Peter K.
Porcar, Lionel
Liu, Yun
Liu, Yee-Lang
Kai, Ji-Jung
Chen, Wei-Ren
TI Study of nanoprecipitates in a nickel-based superalloy using small-angle
neutron scattering and transmission electron microscopy
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID ALLOY
AB Small-angle neutron scattering (SANS) experiments were performed on a Ni-based nanoprecipitate-strengthened superalloy. A theoretical model for SANS absolute intensity distribution I(Q) was presented to extract the structural properties. During the deformation process, a change in the morphology of precipitates was discovered. However, the average interprecipitate distance and the average volume of precipitates were found to remain invariant. This microstructural information resolved by SANS is in good agreement with the results obtained from the quantitative transmission-electron-microscopy image analysis. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3002288]
C1 [Huang, E-Wen; Liaw, Peter K.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Porcar, Lionel; Liu, Yun] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[Liu, Yee-Lang; Kai, Ji-Jung] Natl Tsing Hua Univ, Dept Engn & Syst Sci, Hsinchu 300, Taiwan.
[Chen, Wei-Ren] Oak Ridge Natl Lab, Spallat Neutron Source, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
RP Huang, EW (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
EM chenw@ornl.gov
RI Huang, E-Wen/A-7509-2009; Liu, Yun/A-2478-2010; Liu, Yun/F-6516-2012;
Huang, E-Wen/A-5717-2015;
OI Liu, Yun/0000-0002-0944-3153; Liu, Yun/0000-0002-0944-3153; Huang,
E-Wen/0000-0003-4986-0661; KAI, Ji-jung/0000-0001-7848-8753
FU International Materials Institutes (IMI) Program (DMR-0231320) National
Science Foundation (NSF); NSF [DMR-0454672]
FX International Materials Institutes (IMI) Program (DMR-0231320) National
Science Foundation (NSF), supports this research. NIST U. S. DOC
provided the neutron-research facilities under the NSF agreement
DMR-0454672. We thank Haynes International, Inc.6 for
providing the materials.
NR 13
TC 16
Z9 16
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 OCT 20
PY 2008
VL 93
IS 16
AR 161904
DI 10.1063/1.3002288
PG 3
WC Physics, Applied
SC Physics
GA 365CO
UT WOS:000260383700016
ER
PT J
AU Huger, E
Tietze, U
Lott, D
Bracht, H
Bougeard, D
Haller, EE
Schmidt, H
AF Hueger, E.
Tietze, U.
Lott, D.
Bracht, H.
Bougeard, D.
Haller, E. E.
Schmidt, H.
TI Self-diffusion in germanium isotope multilayers at low temperatures
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID SILICON; HETEROSTRUCTURES; DEFECTS; GALLIUM; SI
AB Self-diffusion in intrinsic single crystalline germanium was investigated between 429 and 596 degrees C using (70)Ge/(nat)Ge isotope multilayer structures. The diffusivities were determined by neutron reflectometry from the decay of the first and third order Bragg peak. At high temperatures the diffusivities are in excellent agreement with literature data obtained by ion beam sputtering techniques, while considerably smaller diffusion lengths between 0.6 and 4.1 nm were measured. At lower temperatures the accessible range of diffusivities could be expanded to D approximate to 1x10(-25) m(2) s(-1), which is three orders of magnitude lower than the values measured by sputtering techniques. Taking into account available data on Ge self-diffusion, the temperature dependence is accurately described over nine orders of magnitude by a single Arrhenius equation. A diffusion activation enthalpy of 3.13 +/- 0.03 eV and a pre-exponential factor of 2.54x10(-3) m(2) s(-1) for temperatures between 429 and 904 degrees C are obtained. Single vacancies are considered to prevail self-diffusion in Ge over the whole temperature range. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3002294]
C1 [Hueger, E.; Schmidt, H.] Tech Univ Clausthal, Inst Met, AG Mat Phys, D-38678 Clausthal Zellerfeld, Germany.
[Tietze, U.; Lott, D.] GKSS Forschungszentrum Geesthacht GmbH, D-21502 Geesthacht, Germany.
[Bracht, H.] Univ Munster, Inst Mat Phys, D-48149 Munster, Germany.
[Bougeard, D.] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany.
[Haller, E. E.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Huger, E (reprint author), Tech Univ Clausthal, Inst Met, AG Mat Phys, Robert Koch Str 42, D-38678 Clausthal Zellerfeld, Germany.
EM erwin.hueger@tu-clausthal.de
RI Schmidt, Harald/E-8736-2014
OI Schmidt, Harald/0000-0001-9389-8507
FU German Research Foundation [SCHM 1569/7-1]; SFB [631 TPC4]
FX This research was supported by the German Research Foundation under
Contract No. SCHM 1569/7-1. One of us (D. B.) acknowledges support by
SFB 631 TPC4.
NR 28
TC 69
Z9 69
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD OCT 20
PY 2008
VL 93
IS 16
AR 162104
DI 10.1063/1.3002294
PG 3
WC Physics, Applied
SC Physics
GA 365CO
UT WOS:000260383700029
ER
PT J
AU Kondo, S
Katoh, Y
Snead, LL
AF Kondo, S.
Katoh, Y.
Snead, L. L.
TI Unidirectional formation of tetrahedral voids in irradiated silicon
carbide
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID VACANCY CLUSTERS; SURFACES; METALS; STABILITY; GROWTH; VAPOR; SI
AB The {111} tetrahedral voids induced by neutron irradiation in 3C-SiC were found to be spatially oriented in only one of two possible directions. The tetrahedral shape was unexpected as the surface-to-volume ratio is larger than the alternative {111} octahedral void common in both metals and ceramics. From a geometric viewpoint, all faces of the observed voids are either Si- or C-terminated surfaces. By comparing the surface area with the octahedral void (composed of the both Si- and C-surfaces) of the same volume, the considerable difference in surface energy between the Si(111) and C((111) over bar) was implicated. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3005650].
C1 [Kondo, S.; Katoh, Y.; Snead, L. L.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Kondo, S (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Div, POB 2008, Oak Ridge, TN 37831 USA.
EM kondos1@ornl.gov
OI Katoh, Yutai/0000-0001-9494-5862
NR 22
TC 17
Z9 18
U1 1
U2 11
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 OCT 20
PY 2008
VL 93
IS 16
AR 163110
DI 10.1063/1.3005650
PG 3
WC Physics, Applied
SC Physics
GA 365CO
UT WOS:000260383700056
ER
PT J
AU Millett, PC
Wolf, D
Desai, T
Yamakov, V
AF Millett, Paul C.
Wolf, Dieter
Desai, Tapan
Yamakov, Vesselin
TI Time scale for point-defect equilibration in nanostructures
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID VACANCY CONCENTRATIONS; MOLECULAR-DYNAMICS; METALS
AB Molecular dynamics simulations of high-temperature annealing are performed on nanostructured materials enabling direct observation of vacancy emission from planar defects (i.e., grain boundaries and free surfaces) to populate the initially vacancy-free grain interiors on a subnanosecond time scale. We demonstrate a universal time-length scale correlation that governs these re-equilibration processes, suggesting that nanostructures are particularly stable against perturbations in their point-defect concentrations, caused for example by particle irradiation or temperature fluctuations. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3005175]
C1 [Millett, Paul C.; Wolf, Dieter; Desai, Tapan] Idaho Natl Lab, Dept Mat Sci, Idaho Falls, ID 83415 USA.
[Yamakov, Vesselin] Natl Inst Aerosp, Hampton, VA 23693 USA.
RP Millett, PC (reprint author), Idaho Natl Lab, Dept Mat Sci, Idaho Falls, ID 83415 USA.
EM paul.millett@inl.gov
FU DOE Idaho Operations Office [DE-AC07-051D14517V]; National Institute of
Aerospace and NASA Langley Research Center [NCC-1-02043]; CMSN-DOE-BES
project
FX P. C. M, D. W., and T. D. gratefully acknowledge support from the INL
LDRD program under DOE Idaho Operations Office Contract No.
DE-AC07-051D14517V. V.Y. was sponsored through cooperative Agreement No.
NCC-1-02043 between the National Institute of Aerospace and NASA Langley
Research Center. All authors are grateful for collaborative interactions
funded by the CMSN-DOE-BES project on "Multi-scale simulation of
thermo-mechanical processes in irradiated fission-reactor materials."
NR 15
TC 11
Z9 11
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD OCT 20
PY 2008
VL 93
IS 16
AR 161902
DI 10.1063/1.3005175
PG 3
WC Physics, Applied
SC Physics
GA 365CO
UT WOS:000260383700014
ER
PT J
AU Kowalski, M
Rubin, D
Aldering, G
Agostinho, RJ
Amadon, A
Amanullah, R
Balland, C
Barbary, K
Blanc, G
Challis, PJ
Conley, A
Connolly, NV
Covarrubias, R
Dawson, KS
Deustua, SE
Ellis, R
Fabbro, S
Fadeyev, V
Fan, X
Farris, B
Folatelli, G
Frye, BL
Garavini, G
Gates, EL
Germany, L
Goldhaber, G
Goldman, B
Goobar, A
Groom, DE
Haissinski, J
Hardin, D
Hook, I
Kent, S
Kim, AG
Knop, RA
Lidman, C
Linder, EV
Mendez, J
Meyers, J
Miller, GJ
Moniez, M
Mourao, AM
Newberg, H
Nobili, S
Nugent, PE
Pain, R
Perdereau, O
Perlmutter, S
Phillips, MM
Prasad, V
Quimby, R
Regnault, N
Rich, J
Rubenstein, EP
Ruiz-Lapuente, P
Santos, FD
Schaefer, BE
Schommer, RA
Smith, RC
Soderberg, AM
Spadafora, AL
Strolger, LG
Strovink, M
Suntzeff, NB
Suzuki, N
Thomas, RC
Walton, NA
Wang, L
Wood-Vasey, WM
Yun, JL
AF Kowalski, M.
Rubin, D.
Aldering, G.
Agostinho, R. J.
Amadon, A.
Amanullah, R.
Balland, C.
Barbary, K.
Blanc, G.
Challis, P. J.
Conley, A.
Connolly, N. V.
Covarrubias, R.
Dawson, K. S.
Deustua, S. E.
Ellis, R.
Fabbro, S.
Fadeyev, V.
Fan, X.
Farris, B.
Folatelli, G.
Frye, B. L.
Garavini, G.
Gates, E. L.
Germany, L.
Goldhaber, G.
Goldman, B.
Goobar, A.
Groom, D. E.
Haissinski, J.
Hardin, D.
Hook, I.
Kent, S.
Kim, A. G.
Knop, R. A.
Lidman, C.
Linder, E. V.
Mendez, J.
Meyers, J.
Miller, G. J.
Moniez, M.
Mourao, A. M.
Newberg, H.
Nobili, S.
Nugent, P. E.
Pain, R.
Perdereau, O.
Perlmutter, S.
Phillips, M. M.
Prasad, V.
Quimby, R.
Regnault, N.
Rich, J.
Rubenstein, E. P.
Ruiz-Lapuente, P.
Santos, F. D.
Schaefer, B. E.
Schommer, R. A.
Smith, R. C.
Soderberg, A. M.
Spadafora, A. L.
Strolger, L. -G.
Strovink, M.
Suntzeff, N. B.
Suzuki, N.
Thomas, R. C.
Walton, N. A.
Wang, L.
Wood-Vasey, W. M.
Yun, J. L.
CA Supernova Cosmology Project
TI IMPROVED COSMOLOGICAL CONSTRAINTS FROM NEW, OLD, AND COMBINED SUPERNOVA
DATA SETS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE cosmological parameters; cosmology: observations; supernovae: general
ID HUBBLE-SPACE-TELESCOPE; HIGH-REDSHIFT SUPERNOVAE; 2-PARAMETER LUMINOSITY
CORRECTION; LARGE-SCALE STRUCTURE; BVRI LIGHT CURVES; IA SUPERNOVAE;
DARK ENERGY; INFRARED PHOTOMETRY; HOST GALAXY; SPECTROSCOPIC
OBSERVATIONS
AB We present a new compilation of Type Ia supernovae (SNe Ia), a new data set of low-redshift nearby-Hubble-flow SNe, and new analysis procedures to work with these heterogeneous compilations. This "Union'' compilation of 414 SNe Ia, which reduces to 307 SNe after selection cuts, includes the recent large samples of SNe Ia from the Supernova Legacy Survey and ESSENCE Survey, the older data sets, as well as the recently extended data set of distant supernovae observed with the Hubble Space Telescope (HST). A single, consistent, and blind analysis procedure is used for all the various SN Ia subsamples, and a new procedure is implemented that consistently weights the heterogeneous data sets and rejects outliers. We present the latest results from this Union compilation and discuss the cosmological constraints from this new compilation and its combination with other cosmological measurements (CMB and BAO). The constraint we obtain from supernovae on the dark energy density is Omega(Lambda) = 0.713(-0.029)(+0.027)(stat)(-0.039)(+0.036)(sys), for a flat, Lambda CDM universe. Assuming a constant equation of state parameter, w, the combined constraints from SNe, BAO, and CMB give w = -0.969(-0.063)(+0.059)(stat)(-0.066)(+0.063)(sys). While our results are consistent with a cosmological constant, we obtain only relatively weak constraints on a w that varies with redshift. In particular, the current SN data do not yet significantly constrain w at z > 1. With the addition of our new nearby Hubble-flow SNe Ia, these resulting cosmological constraints are currently the tightest available.
C1 [Kowalski, M.] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany.
[Rubin, D.; Aldering, G.; Barbary, K.; Dawson, K. S.; Goldhaber, G.; Groom, D. E.; Kim, A. G.; Nugent, P. E.; Perlmutter, S.; Prasad, V.; Spadafora, A. L.; Strovink, M.; Suzuki, N.; Thomas, R. C.] EO Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Rubin, D.; Barbary, K.; Goldhaber, G.; Meyers, J.; Perlmutter, S.; Strovink, M.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Agostinho, R. J.; Yun, J. L.] Univ Lisbon, Ctr Astron & Astrofis, Astron Observ, P-1349018 Lisbon, Portugal.
[Amadon, A.; Rich, J.] CEA Saclay, DSM DAPNIA, F-91191 Gif Sur Yvette, France.
[Amanullah, R.; Linder, E. V.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Balland, C.; Hardin, D.; Pain, R.; Regnault, N.] Univ Paris 06, CNRS, IN2P3, LPNHE, Paris, France.
[Blanc, G.] Univ Paris 07, APC, F-75205 Paris 13, France.
[Challis, P. J.; Wood-Vasey, W. M.] Harvard Univ, Ctr Astrophys, Cambridge, MA 02138 USA.
[Conley, A.] Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H8, Canada.
[Connolly, N. V.] Hamilton Coll, Dept Phys, Clinton, NY 13323 USA.
[Covarrubias, R.] Observ Carnegie Inst Washington, Pasadena, CA USA.
[Deustua, S. E.] Amer Astron Soc, Washington, DC 20009 USA.
[Ellis, R.; Quimby, R.; Soderberg, A. M.] CALTECH, Pasadena, CA 91125 USA.
[Fabbro, S.; Mourao, A. M.] Univ Tecn Lisboa, CENTRA, P-1049 Lisbon, Portugal.
[Fabbro, S.; Mourao, A. M.] IST, Dept Fis, P-1049 Lisbon, Portugal.
[Fadeyev, V.] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA.
[Fan, X.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
[Farris, B.] Univ Illinois, Dept Phys, Urbana, IL 61801 USA.
[Frye, B. L.] Dublin City Univ, Dept Phys Sci, Dublin 9, Ireland.
[Garavini, G.; Goobar, A.; Nobili, S.] Stockholm Univ, Dept Phys, Albanova Univ Ctr, S-10691 Stockholm, Sweden.
[Balland, C.; Hardin, D.; Pain, R.; Regnault, N.] Univ Paris 07, CNRS, IN2P3, LPNHE, Paris, France.
[Gates, E. L.] Univ Calif Santa Cruz, Lick Observ, Mt Hamilton, CA 95140 USA.
[Germany, L.] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia.
[Goldman, B.] MPIA, D-69117 Heidelberg, Germany.
[Haissinski, J.; Moniez, M.; Perdereau, O.] Univ Paris 11, CNRS, IN2P3, Lab Accelerateur Lineaire, F-91898 Orsay, France.
[Hook, I.] Univ Oxford, Sub Dept Astrophys, Oxford OX1 3RH, England.
[Kent, S.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Knop, R. A.] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37240 USA.
[Lidman, C.] European So Observ, Santiago 19, Chile.
[Mendez, J.] Isaac Newton Grp, Santa Cruz De La Palmas 38780, Islas Canarias, Spain.
[Mendez, J.; Ruiz-Lapuente, P.] Univ Barcelona, Dept Astron, Barcelona, Spain.
[Miller, G. J.] Southwestern Coll, Dept Astron, Chula Vista, CA 91910 USA.
[Newberg, H.] Rensselaer Polytech Inst, Dept Phys, Troy, NY 12180 USA.
[Phillips, M. M.] Carnegie Observ, Las Campanas Observ, La Serena, Chile.
[Rubenstein, E. P.] Adv Fuel Res Inc, E Hartford, CT 06108 USA.
[Santos, F. D.] Univ Lisbon, Dept Phys, Fac Sci, P-1749016 Lisbon, Portugal.
[Schaefer, B. E.] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
[Smith, R. C.] Natl Opt Astron Observ, Cerro Tololo Inter Amer Observ, La Serena, Chile.
[Strolger, L. -G.] Western Kentucky Univ, Dept Phys & Astron, Bowling Green, KY 42101 USA.
[Suntzeff, N. B.; Wang, L.] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA.
[Walton, N. A.] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.
RP Kowalski, M (reprint author), Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany.
RI Folatelli, Gaston/A-4484-2011; Kowalski, Marek/G-5546-2012; Santos,
Filipe/M-7709-2013; Perlmutter, Saul/I-3505-2015; Mourao,
Ana/K-9133-2015; Yun, Joao/M-3177-2015; Blanc, Guillermo/I-5260-2016;
OI Strovink, Mark/0000-0001-7020-7769; Meyers, Joshua/0000-0002-2308-4230;
Santos, Filipe/0000-0001-7316-1479; Perlmutter,
Saul/0000-0002-4436-4661; Mourao, Ana/0000-0002-0855-1849; Yun,
Joao/0000-0002-6413-728X; Agostinho, Rui/0000-0002-7177-2695
NR 96
TC 862
Z9 866
U1 4
U2 25
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 OCT 20
PY 2008
VL 686
IS 2
BP 749
EP 778
DI 10.1086/589937
PG 30
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 364YB
UT WOS:000260370500001
ER
PT J
AU Nakamura, M
Tregillis, IL
Li, H
Li, S
AF Nakamura, Masanori
Tregillis, Ian L.
Li, Hui
Li, Shengtai
TI A NUMERICAL MODEL OF HERCULES A BY MAGNETIC TOWER: JET/LOBE TRANSITION,
WIGGLING, AND THE MAGNETIC FIELD DISTRIBUTION
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: active; galaxies: individual (Hercules A); galaxies: jets;
methods: numerical; MHD
ID ACTIVE GALACTIC NUCLEUS; EXTRAGALACTIC RADIO-SOURCES; ACCRETION DISKS;
POYNTING JETS; GALAXY HERCULES; LOW-LUMINOSITY; ALFVENIC JETS; DYNAMICS;
CLUSTER; ENVIRONMENT
AB We apply magnetohydrodynamic (MHD) modeling to the radio galaxy Hercules A to investigate the jet-driven shock, jet/lobe transition, wiggling, and magnetic field distribution associated with this source. The model consists of magnetic tower jets in a galaxy cluster environment, which has been discussed in a series of our papers. The profile of the underlying ambient gas plays an important role in the jet/lobe morphology. The balance between the magnetic pressure generated by the axial current and the ambient gas pressure can determine the lobe radius. The jet body is confined jointly by the external pressure and gravity inside the cluster core radius Rc, while outside Rc it expands radially to form fat lobes in a steeply decreasing ambient thermal pressure gradient. The current-carrying jets are responsible for generating a strong, tightly wound helical magnetic field. This magnetic configuration will be unstable against the current-driven kink mode, which visibly grows beyond Rc, where a separation between the jet forward and return currents occurs. The reversed pinch profile of the global magnetic field associated with the jet and lobes produces projected B-vector distributions aligned with the jet flow and the lobe edge. An AGN-driven shock powered by the expanding magnetic tower jet surrounds the jet/lobe structure and heats the ambient ICM. The lobes expand subsonically; no obvious hot spots are produced at the heads of lobes. Several key features in our MHD modeling may be qualitatively supported by observations of Hercules A.
C1 [Nakamura, Masanori; Tregillis, Ian L.; Li, Hui; Li, Shengtai] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Nakamura, M (reprint author), Los Alamos Natl Lab, MS B227, Los Alamos, NM 87545 USA.
EM nakamura@stsci.edu
OI Li, Shengtai/0000-0002-4142-3080
FU US Department of Energy at Los Alamos National Laboratory (LANL)
[DE-AC52-06NA25396]
FX Helpful discussions with Philipp Kronberg and Steven Diehl are
gratefully acknowledged. The authors thank the anonymous referee for
helpful suggestions. This work was carried out under the auspices of the
National Nuclear Security Administration of the US Department of Energy
at Los Alamos National Laboratory (LANL) under contract
DE-AC52-06NA25396. It was supported by the Laboratory Directed Research
and Development Program and the Institute of Geophysics and Planetary
Physics at LANL.
NR 66
TC 21
Z9 21
U1 0
U2 3
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD OCT 20
PY 2008
VL 686
IS 2
BP 843
EP 850
DI 10.1086/591222
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 364YB
UT WOS:000260370500008
ER
PT J
AU Muzzin, A
Wilson, G
Lacy, M
Yee, HKC
Stanford, SA
AF Muzzin, Adam
Wilson, Gillian
Lacy, Mark
Yee, H. K. C.
Stanford, S. A.
TI THE EVOLUTION OF DUSTY STAR FORMATION AND STELLAR MASS ASSEMBLY IN
CLUSTERS: RESULTS FROM THE IRAC 3.6, 4.5, 5.8, AND 8.0 mu m CLUSTER
LUMINOSITY FUNCTIONS
SO ASTROPHYSICAL JOURNAL
LA English
DT Review
DE galaxies: clusters: general; galaxies: evolution; galaxies: photometry;
galaxies: starburst; Galaxy: fundamental parameters; infrared: galaxies
ID EARLY-TYPE GALAXIES; COLOR-MAGNITUDE RELATION; NEAR-INFRARED PROPERTIES;
ACTIVE GALACTIC NUCLEI; DIGITAL SKY SURVEY; MORPHOLOGY-DENSITY RELATION;
TO-LIGHT RATIOS; TELESCOPE 1ST-LOOK SURVEY; HALO OCCUPATION NUMBER;
HUBBLE-SPACE-TELESCOPE
AB We present a catalog of 99 candidate clusters and groups of galaxies in the redshift range 0.1 < z(phot) < 1.3 discovered in the Spitzer FLS. The clusters are selected by their R-c - 3.6 mu m galaxy color-magnitude relation using the cluster red-sequence algorithm. Using this cluster sample, we compute the 3.6, 4.5, 5.8, and 8.0 mu m cluster LFs. Similar to previous studies, we find that for the bands that trace stellar mass at these redshifts (3.6 and 4.5 mu m) the evolution in M* is consistent with a passively evolving population of galaxies with a high formation redshift (z(f) > 1: 5). Using the 3.6 mu m LF as a proxy for stellar luminosity, we remove this component from the MIR (5.8 and 8.0 mu m) cluster LFs and measure the LF of dusty star formation/AGNs in clusters. We find that at z < 0.4 the bright end of the cluster 8.0 mu m LF is well described by a composite population of quiescent galaxies and regular star-forming galaxies with a mix consistent with typical cluster blue fractions; however, at z > 0: 4, an additional population of dusty starburst galaxies is required to properly model the 8.0 mu m LFs. Comparison to field studies at similar redshifts shows a strong differential evolution in the field and cluster 8.0 mu m LFs with redshift. At z similar to 0.65 8.0 mu m-detected galaxies are more abundant in clusters compared to the field, but thereafter the number of 8.0 mu m sources in clusters declines with decreasing redshift, and by z similar to 0.15, clusters are underdense relative to the field by a factor of similar to 5. The rapid differential evolution between the cluster and field LFs is qualitatively consistent with recent field galaxy studies that show that the star formation rates of galaxies in high-density environments are larger than those in low-density environments at higher redshift.
C1 [Muzzin, Adam; Yee, H. K. C.] Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H4, Canada.
[Wilson, Gillian; Lacy, Mark] CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA.
[Wilson, Gillian] Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA.
[Stanford, S. A.] Univ Calif Davis, Davis, CA 95616 USA.
[Stanford, S. A.] Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94551 USA.
RP Muzzin, A (reprint author), Yale Univ, Dept Astron, New Haven, CT 06520 USA.
EM adam.muzzin@yale.edu
NR 135
TC 46
Z9 46
U1 0
U2 2
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD OCT 20
PY 2008
VL 686
IS 2
BP 966
EP 994
DI 10.1086/591542
PG 29
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 364YB
UT WOS:000260370500017
ER
PT J
AU Offner, SSR
Klein, RI
Mckee, CF
AF Offner, Stella S. R.
Klein, Richard I.
McKee, Christopher F.
TI DRIVEN AND DECAYING TURBULENCE SIMULATIONS OF LOW-MASS STAR FORMATION:
FROM CLUMPS TO CORES TO PROTOSTARS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE hydrodynamics; ISM: clouds; methods: numerical; stars: formation;
turbulence
ID MOLECULAR CLOUD CORES; SELF-GRAVITATIONAL HYDRODYNAMICS; SMOOTHED
PARTICLE HYDRODYNAMICS; ADAPTIVE MESH REFINEMENT; BROWN DWARFS; STELLAR
CLUSTERS; DARK CLOUDS; DENSE CORES; MAGNETOHYDRODYNAMIC TURBULENCE;
GRAVOTURBULENT FRAGMENTATION
AB Molecular clouds are observed to be turbulent, but the origin of this turbulence is not well understood. As a result, there are two different approaches to simulating molecular clouds, one in which the turbulence is allowed to decay after it is initialized, and one in which it is driven. We use the adaptive mesh refinement (AMR) code, Orion, to perform high-resolution simulations of molecular cloud cores and protostars in environments with both driven and decaying turbulence. We include self-gravity, use a barotropic equation of state, and represent regions exceeding the maximum grid resolution with sink particles. We analyze the properties of bound cores such as size, shape, line width, and rotational energy, and we find reasonable agreement with observation. At high resolution the different rates of core accretion in the two cases have a significant effect on protostellar system development. Clumps forming in a decaying turbulence environment produce high-multiplicity protostellar systems with Toomre Q unstable disks that exhibit characteristics of the competitive accretion model for star formation. In contrast, cores forming in the context of continuously driven turbulence and virial equilibrium form smaller protostellar systems with fewer low-mass members. Our simulations of driven and decaying turbulence show some statistically significant differences, particularly in the production of brown dwarfs and core rotation, but the uncertainties are large enough that we are not able to conclude whether observations favor one or the other.
C1 [Offner, Stella S. R.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Klein, Richard I.] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA.
[Klein, Richard I.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[McKee, Christopher F.] Univ Calif Berkeley, Dept Phys & Astron, Berkeley, CA 94720 USA.
RP Offner, SSR (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM soffner@berkeley.edu
FU Lawrence Livermore National Laboratory [B-542762, DE-AC52-07NA27344];
NASA [NNG06GH96G, AST 06-06831]; National Science Foundation
[PHY05-51164]; NSF San Diego Supercomputing Center; NPACI [UCB267];
Office of Science of the Department of Energy [DE-AC03-76SF00098]; ERCAP
[80325]
FX We thank P. S. Li, M. Krumholz, and R. Fisher for helpful discussions
and suggestions. Support for this work was provided under the auspices
of the Department of Energy by Lawrence Livermore National Laboratory
under contacts B-542762 (S.S.R.O.) and DE-AC52-07NA27344 (R. I. K.);
NASA ATP grant NNG06GH96G (C .F.M. and R. I. K.); grant AST 06-06831 (C.
F. M. and R. I. K.); and National Science Foundation under grant
PHY05-51164 (C. F. M. and S. S. R. O.). Computational resources were
provided by the NSF San Diego Supercomputing Center through NPACI
program grant UCB267; and the National Energy Research Scientific
Computer Center, which is supported by the Office of Science of the
Department of Energy under contract number DE-AC03-76SF00098, through
ERCAP grant 80325.
NR 83
TC 58
Z9 58
U1 0
U2 4
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD OCT 20
PY 2008
VL 686
IS 2
BP 1174
EP 1194
DI 10.1086/590238
PG 21
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 364YB
UT WOS:000260370500032
ER
PT J
AU Park, SH
Lee, J
Choe, GS
Chae, J
Jeong, H
Yang, G
Jing, J
Wang, HM
AF Park, Sung-Hong
Lee, Jeongwoo
Choe, G. S.
Chae, Jongchul
Jeong, Hyewon
Yang, Guo
Jing, Ju
Wang, Haimin
TI THE VARIATION OF RELATIVE MAGNETIC HELICITY AROUND MAJOR FLARES
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Sun: flares; Sun: magnetic fields
ID INJECTION; ENERGY; MECHANISM; FLUXES; MOTION; FIELD
AB We have investigated the variation of magnetic helicity over a span of several days around the times of 11 X-class flares which occurred in seven active regions (NOAA 9672, 10030, 10314, 10486, 10564, 10696, and 10720) using the magnetograms taken by the Michelson Doppler Imager (MDI) on board the Solar and Heliospheric Observatory (SOHO). As a major result we found that each of these major flares was preceded by a significant helicity accumulation, (1.8-16) x 10(42) Mx(2) over a long period (0.5 to a few days). Another finding is that the helicity accumulates at a nearly constant rate, (4.5-4.8) x 10(40) Mx(2) hr(-1), and then becomes nearly constant before the flares. This led us to distinguish the helicity variation into two phases: a phase of monotonically increasing helicity and the following phase of relatively constant helicity. As expected, the amount of helicity accumulated shows a modest correlation with time-integrated soft X-ray flux during flares. However, the average helicity change rate in the first phase shows even stronger correlation with the time-integrated soft X-ray flux. We discuss the physical implications of this result and the possibility that this characteristic helicity variation pattern can be used as an early warning sign for solar eruptions.
C1 [Park, Sung-Hong; Lee, Jeongwoo; Yang, Guo; Jing, Ju; Wang, Haimin] New Jersey Inst Technol, Ctr Solar Terr Res, Newark, NJ 07102 USA.
[Park, Sung-Hong; Yang, Guo; Jing, Ju; Wang, Haimin] Big Bear Solar Observ, Big Bear City, CA 92314 USA.
[Choe, G. S.] Kyung Hee Univ, Dept Astron & Space Sci, Yongin 449701, South Korea.
[Choe, G. S.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Chae, Jongchul; Jeong, Hyewon] Seoul Natl Univ, Astron Program, Dept Phys & Astron, Seoul 151742, South Korea.
[Chae, Jongchul; Jeong, Hyewon] Seoul Natl Univ, Dept Phys & Astron, FPRD, Seoul 151742, South Korea.
RP Park, SH (reprint author), New Jersey Inst Technol, Ctr Solar Terr Res, 323 Martin Luther King Blvd,101 Tiernan Hall, Newark, NJ 07102 USA.
EM sp295@njit.edu
RI Choe, Gwangson/E-2366-2013; Park, Sung-Hong/K-1578-2014
OI Park, Sung-Hong/0000-0001-9149-6547
FU NSF [ATM-0548952, AST 06-07544]; NASA [NNG0-6GC81G, NNG0-6GE76G,
NNH04AA16I]; DOE [DE-AC02-76-CH03073]
FX The authors wish to thank the referee for valuable comments on the
manuscript. The work is supported by NSF grant ATM-0548952 and NASA
grant NNG0-6GC81G. J. L. was supported by NSF grant AST 06-07544 and
NASA grant NNG0-6GE76G. G. S. C. was supported by DOE contract
DE-AC02-76-CH03073 and NASA grant NNH04AA16I.
NR 23
TC 18
Z9 18
U1 0
U2 3
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD OCT 20
PY 2008
VL 686
IS 2
BP 1397
EP 1403
DI 10.1086/591117
PG 7
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 364YB
UT WOS:000260370500049
ER
PT J
AU Ryutova, M
Berger, T
Frank, Z
Title, A
AF Ryutova, M.
Berger, T.
Frank, Z.
Title, A.
TI ON THE PENUMBRAL JETLIKE FEATURES AND CHROMOSPHERIC BOW SHOCKS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Sun: chromosphere; Sun: filaments; Sun: magnetic fields; Sun:
photosphere; sunspots
ID SUNSPOT PENUMBRAE; FILAMENTARY STRUCTURE; PHOTOSPHERIC NETWORK; MAGNETIC
ELEMENTS; TRANSITION REGION; FINE-STRUCTURE; APPEARANCE
AB We present observations of sunspot penumbrae obtained during the disk passage of AR 10923 (2006 November 10-20) with the SOT instrument on Hinode in 4305 angstrom G band and Ca II lambda 3968 H line. Along with recently discovered jetlike features (Katsukawa et al. 2007), we find other kinds of bright elongated transients abundantly pervading the entire penumbra and drifting as a whole in a direction almost perpendicular to their long axes. Their measured velocities strongly depend on their orientation with respect to the line of sight and range from similar or equal to 1 to similar or equal to 20 km s(-1). We present quantitative analysis of these features and interpret them relative to our recent penumbral model (Ryutova et al. 2008) to show that they are produced by shocks resulting from a slingshot effect associated with the ongoing reconnection processes in neighboring penumbral filaments. Due to sharp stratification of the low atmosphere, postreconnection flux tubes moving upward quickly accelerate. At transonic velocities a bow (detached) shock is formed in front of the flux tube, as usually occurs in cases of blunt bodies moving with supersonic velocities. Observed parameters of transients are in good agreement with calculated parameters of bow shocks. On some, much more rare occasions compared to "drifting'' bow-shock-type transients, there appear compact bright transients moving in the radial direction, along their long axis, and having velocities of 20-50 km s(-1). We relate these features to a category of true microjets.
C1 [Ryutova, M.] Lawrence Livermore Natl Lab, IGPP, Livermore, CA 94550 USA.
[Berger, T.; Frank, Z.; Title, A.] Lockheed Martin Solar & Astrophys Lab, Palo Alto, CA 94304 USA.
RP Ryutova, M (reprint author), Lawrence Livermore Natl Lab, IGPP, Livermore, CA 94550 USA.
EM ryutova1@llnl.gov; berger@lmsal.com; zoe@lmsal.com; title@lmsal.com
FU Lawrence Livermore National Laboratory [W-7405-Eng-48]; NASA
[NAG5-10483, NN07AA01C]
FX We thank Dick Shine for help and Ted Tarbell for useful discussions. We
also thank the SOT team for making the observations possible. We are
grateful to an anonymous referee for many helpful comments and
suggestions. This work was performed under the auspices of the US DOE by
UC, Lawrence Livermore National Laboratory under contract W-7405-Eng-48
and supported by NASA contract at Stanford and Lockheed Martin
(NAG5-10483, MDI). T. E. B. gratefully acknowledges the support of NASA
contract NN07AA01C at LMSAL. Hinode is a Japanese mission developed and
launched by ISAS/JAXA, with NAOJ as domestic partner and NASA and STFC
(UK) as international partners. Science operation of Hinode is conducted
by the Hinode science team organized at ISAS/JAXA.
NR 26
TC 17
Z9 17
U1 0
U2 2
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD OCT 20
PY 2008
VL 686
IS 2
BP 1404
EP 1419
DI 10.1086/591498
PG 16
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 364YB
UT WOS:000260370500050
ER
PT J
AU Rubin-Pitel, SB
Zhang, HJ
Vu, T
Brunzelle, JS
Zhao, HM
Nair, SK
AF Rubin-Pitel, Sheryl B.
Zhang, Houjin
Vu, Trang
Brunzelle, Joseph S.
Zhao, Huimin
Nair, Satish K.
TI Distinct Structural Elements Dictate the Specificity of the Type III
Pentaketide Synthase from Neurospora crassa
SO CHEMISTRY & BIOLOGY
LA English
DT Article
ID PLANT POLYKETIDE BIOSYNTHESIS; CHAIN-LENGTH CONTROL; MACROMOLECULAR
STRUCTURES; CHALCONE SYNTHASE; SUPERFAMILY; REFINEMENT; CHROMONE;
CHECKING; DENSITY
AB The fungal type III polyketide synthase 2'-oxoalkylresorcylic acid synthase (ORAS) primes with a range of acyl-Coenzyme A thioesters (C(4)-C(20)) and extends using malonyl-Coenzyme A to produce pyrones, resorcinols, and resorcylic acids. To gain insight into this unusual substrate specificity and product profile, we have determined the crystal structures of ORAS to 1.75 angstrom resolution, the Phe-252 -> Gly site-directed mutant to 2.1 angstrom resolution, and a binary complex of ORAS with eicosanoic acid to 2.0 angstrom resolution. The structures reveal a distinct rearrangement of structural elements near the active site that allows accommodation of long-chain fatty acid esters and a reorientation of the gating mechanism that controls cyclization and polyketide chain length. The roles of these structural elements are further elucidated by characterization of various structure-based site-directed variants. These studies establish an unexpected plasticity to the PKS fold, unanticipate from structural studies of other members of this enzyme family.
C1 [Rubin-Pitel, Sheryl B.; Vu, Trang; Zhao, Huimin] Univ Illinois, Dept Chem & Biomol Engn, Urbana, IL 61801 USA.
[Zhang, Houjin; Zhao, Huimin; Nair, Satish K.] Univ Illinois, Dept Biochem, Urbana, IL 61801 USA.
[Brunzelle, Joseph S.] Argonne Natl Labs, Life Sci Collaborat Access Team, Argonne, IL 60439 USA.
[Zhao, Huimin; Nair, Satish K.] Univ Illinois, Ctr Biophys & Computat Biol, Urbana, IL 61801 USA.
RP Zhao, HM (reprint author), Univ Illinois, Dept Chem & Biomol Engn, 600 S Mathews Ave, Urbana, IL 61801 USA.
EM zhao5@uiuc.edu; snair@uiuc.edu
FU Office of Naval Research [N00014-02-1-0725]; NIGMS; National Institutes
of Health Cell and Molecular Biology Training Grant Program; National
Science Foundation Graduate Research Fellowship Program; National
Science Foundation [DBI-0100085]
FX This research was supported by a grant from the Office of Naval Research
(N00014-02-1-0725 to H.Z.) and NIGMS (S.K.N.). We thank John Chrzas and
staff at SER-CAT (22-BM at Argonne National Laboratories) for
facilitating data collection. We thank N. Nair for preparation of the
Neurospora crassa mRNA library and Anuradha Biswas for assistance in
protein purification. S.B.R.-P. acknowledges support from the National
Institutes of Health Cell and Molecular Biology Training Grant Program
and the National Science Foundation Graduate Research Fellowship
Program. The Q-Tof Ultima mass Spectrometer was purchased in part with a
grant from the National Science Foundation, Division of Biological
Infrastructure (DBI-0100085). The authors declare that they have no
competing interests.
NR 30
TC 22
Z9 22
U1 1
U2 12
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 1074-5521
J9 CHEM BIOL
JI Chem. Biol.
PD OCT 20
PY 2008
VL 15
IS 10
BP 1079
EP 1090
DI 10.1016/j.chembiol.2008.08.011
PG 12
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 364UZ
UT WOS:000260362200011
PM 18940668
ER
PT J
AU Angelici, RJ
Lazar, M
AF Angelici, Robert J.
Lazar, Mihaela
TI Isocyanide Ligands Adsorbed on Metal Surfaces: Applications in
Catalysis, Nanochemistry, and Molecular Electronics
SO INORGANIC CHEMISTRY
LA English
DT Article
ID ENHANCED RAMAN-SCATTERING; GOLD NANOPARTICLE SURFACES; METHYL
ISOCYANIDE; COVALENT ATTACHMENT; OXIDATION CATALYSIS; BENZYL ISOCYANIDE;
PT(111) SURFACE; SINGLE-MOLECULE; ADSORPTION; COMPLEXES
AB Knowledge of the coordination chemistry and reactivity of isocyanide ligands in transition-metal complexes forms the basis for understanding the adsorption and reactions of isocyanides on metal surfaces. In this overview, we explore reactions (often catalytic) of isocyanides adsorbed on metal surfaces that reflect their patterns of reactivity in metal complexes. We also examine applications of isocyanide adsorption to the stabilization of metal nanoparticles, the functionalization of metal electrodes, and the creation of conducting organic-metal junctions in molecule-scale electronic devices.
C1 [Angelici, Robert J.] Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA.
[Angelici, Robert J.] Iowa State Univ, Dept Chem, Ames, IA 50011 USA.
[Lazar, Mihaela] Isotop & Mol Technol, Natl Inst Res & Dev, Cluj Napoca 400293, Romania.
RP Angelici, RJ (reprint author), Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA.
EM angelici@iastate.edu
RI Lazar, Mihaela/B-7578-2011
OI Lazar, Mihaela/0000-0002-1679-1324
FU ACS Award by Strem Chemicals Inc.
FX In looking back over the years, R.J.A. thanks the many people and
organizations that have provided the foundation and support for his
career in chemistry. On the personal side are his parents, who supported
his decision to study chemistry rather than attend to the grocery
business, and his wife Elizabeth of 46 years. On the professional side
are his teachers at St. Olaf College, his Ph.D. mentor Fred Basolo at
Northwestern University, and his postdoctoral mentor E. O. Fischer at
the University of Munich. He is grateful to his graduate students and
postdocs, who propelled the many different projects through to
successful conclusions. 65 Most important among the many different
funding agencies that have supported his work are the U.S. Department of
Energy (BES), NSF, and NIH. Ongoing support of this ACS Award by Strem
Chemicals Inc. is very much appreciated. Finally, Bob thanks his faculty
colleagues in inorganic chemistry at ISU for their friendship and
dedication and Carla J. Holbrook for her excellent secretarial support.
M.L. thanks Dr. Valer Almasan for providing the time necessary to work
on this manuscript.
NR 68
TC 38
Z9 38
U1 1
U2 12
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0020-1669
EI 1520-510X
J9 INORG CHEM
JI Inorg. Chem.
PD OCT 20
PY 2008
VL 47
IS 20
BP 9155
EP 9165
DI 10.1021/ic800513t
PG 11
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 359LQ
UT WOS:000259988600012
PM 18729352
ER
PT J
AU Roy, LE
Batista, ER
Hay, PJ
AF Roy, Lindsay E.
Batista, Enrique R.
Hay, P. Jeffrey
TI Theoretical Studies on the Redox Potentials of Fe Dinuclear Complexes as
Models for Hydrogenase
SO INORGANIC CHEMISTRY
LA English
DT Article
ID DENSITY-FUNCTIONAL THEORY; CLUSTER-FREE HYDROGENASE; EFFECTIVE CORE
POTENTIALS; ACTIVE-SITE MODELS; ONLY HYDROGENASE; IRON HYDROGENASE;
DESULFOVIBRIO-DESULFURICANS; VIBRATIONAL FREQUENCIES; MOLECULAR
CALCULATIONS; METHANOGENIC ARCHAEA
AB Density Functional calculations have been performed at the uB3LYP and uBP86 levels to calculate the one-electron redox potentials for a series of small models based on the diiron hydrogenase enzymes in the presence of acetonitrile (MeCN). The solvation effects in MeCN are incorporated via a self-consistent reaction field (SCRF) using the polarized continuum model (PCM). The calculated redox potentials reproduce the trends in experimental data with an average error of only 0.12 V using the BP86 functional, whereas comparing results with the B3LYP functional require a systematic shift of -0.82 and -0.53 V for oxidation and reduction, respectively. The bonding orbitals and cl-electron populations were examined using Mulliken population analysis, and the results were used to rationalize the calculated and observed redox potentials. These studies demonstrate that the redox potential correlates with the empirical spectrochemical series for the ligands, as well as with the amount of electron density donated by the ligand onto the Fe centers.
C1 [Roy, Lindsay E.; Batista, Enrique R.; Hay, P. Jeffrey] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Batista, ER (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM erb@lanl.gov
FU Laboratory Directed Research and Development (LDRD);
[DE-AC52-06NA25396]
FX This work was supported by the Laboratory Directed Research and
Development (LDRD) program at Los Alamos National Laboratory. Los Alamos
National Laboratory is operated by Los Alamos National Security, LLC,
for the National Nuclear Security Administration of the U.S. Department
of Energy under contract DE-AC52-06NA25396.
NR 78
TC 37
Z9 37
U1 1
U2 18
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0020-1669
EI 1520-510X
J9 INORG CHEM
JI Inorg. Chem.
PD OCT 20
PY 2008
VL 47
IS 20
BP 9228
EP 9237
DI 10.1021/ic800541w
PG 10
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 359LQ
UT WOS:000259988600018
PM 18811143
ER
PT J
AU Wilson, RE
Skanthakumar, S
Knope, KE
Cahill, CL
Soderholm, L
AF Wilson, Richard E.
Skanthakumar, S.
Knope, Karah E.
Cahill, Christopher L.
Soderholm, L.
TI An Open-Framework Thorium Sulfate Hydrate with 11.5 angstrom Voids
SO INORGANIC CHEMISTRY
LA English
DT Article
ID CIS-DIOXIDO URANYL; CRYSTAL-STRUCTURE; SELENATES
AB We report the synthesis of a thorium sulfate hydrate with 11.5 angstrom open channels that propagate through the structure. The compound crystallizes in the tetragonal space group P4(2)/nmc, a = b = 25.890(4) angstrom, c = 9.080(2) angstrom, Z = 8, V = 6086.3(2) angstrom(3). The thermal stability of the compound was investigated using thermogravimetric analysis and high-energy X-ray scattering (HEXS) revealing that the compound begins to undergo decomposition near 200 degrees C with an accompanied loss in crystallinity. The immediate coordination environment about the thorium atoms remains intact through heating to 500 degrees C as demonstrated by HEXS, Further heating reveals the formation of at least two crystalline phases, Th(SO4)(2) and ThO2, which ultimately decompose to ThO2.
C1 [Wilson, Richard E.; Skanthakumar, S.; Soderholm, L.] Argonne Natl Lab, Hean Elements & Separat Sci Grp, Chem Sci & Engn Div, Argonne, IL 60439 USA.
[Knope, Karah E.; Cahill, Christopher L.] George Washington Univ, Dept Chem, Washington, DC 20052 USA.
RP Wilson, RE (reprint author), Argonne Natl Lab, Hean Elements & Separat Sci Grp, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM rewilson@anl.gov
RI Wilson, Richard/H-1763-2011
OI Wilson, Richard/0000-0001-8618-5680
FU U.S. Department of Energy, OBES, Chemical Sciences Division
[DE-AC02-06CH11357, DE-FG02-05ER15736]; OBES, Materials Sciences
Division [DE-AC02-06CHI 1357]
FX This research is supported at Argonne National Laboratory by the U.S.
Department of Energy, OBES, Chemical Sciences Division, under contract
DE-AC02-06CHI 1357. Work at the Advanced Photon Source was supported by
OBES, Materials Sciences Division, under the same contract number. Work
at George Washington University is supported by the U.S. Department of
Energy, OBES, Chemical Sciences Division, under contract number
DE-FG02-05ER15736.
NR 32
TC 25
Z9 26
U1 1
U2 13
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 OCT 20
PY 2008
VL 47
IS 20
BP 9321
EP 9326
DI 10.1021/ic800931f
PG 6
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 359LQ
UT WOS:000259988600027
PM 18811149
ER
PT J
AU Palasyuk, AM
Corbett, JD
AF Palasyuk, Andriy M.
Corbett, John D.
TI BaIrIn4 and Ba2Ir4In13: Two In-Rich Polar Intermetallic Structures with
Different Augmented Prismatic Environments about the Cations
SO INORGANIC CHEMISTRY
LA English
DT Article
ID GOLD SUBSTITUTION; INDIUM CUBES; AU; IR; PD; NETWORKS; EXAMPLES; METALS;
MOTIFS; CAIN2
AB The title phases were synthesized via high-temperature reactions of the elements in welded Ta tubes and characterized by single-crystal X-ray diffraction methods and band calculations. BaIrIn4 adopts the LaCoAl4-type structure: Pmma, Z = 2, a = 8.642(2), b = 4,396(1), and c = 7.906(2) angstrom. Ba2Ir4In13 exhibits a new structure type: Cmc2(1), Z = 4, a = 4.4856(9), b = 29.052(6), and c = 13.687(3) angstrom. BaIrIn4 is constructed from a single basic unit, a Ba-centered pentagonal prism of indium on which two adjacent and the opposed rectangular faces are capped by In and Ir, respectively. The three capping atoms are coplanar with Ba and represent the only augmentation of the pentagonal prism. The relatively large proportions of Ba:Ir, In, and of In:Ir lead to the condensation of homoatomic pentagonal prisms into zigzag chains through the sharing of the two uncapped faces. The cation proportion is much lower in Ba2Ir4In13, and Ba atoms are surrounded by a more anionic Ir/In network without any condensation between prisms. This and the greater Ir proportion lead to a network of formal augmented pentagonal Ba@Ir5In15 and hexagonal Ba@Ir7In15 prisms with overall 5-10-5 and 6-10-6 arrangements of parallel planar rings, respectively, although most Ir is not well bound to the prisms. The latter prism, with alternating Ir/In atoms in the basal faces, is novel for Ae-T-In phases (Ae = alkaline-earth metal, T = Co, Rh, Ir). Band structure calculation results (linear-muff in-tin-orbital method in the atomic sphere approximation) emphasize the greater overlap populations (similar to strengths) of the Ir-In bonds and confirm expectations that both compounds are metallic. The Ir 5d bands are narrower and lie higher in energy than those for Au in analogous phases.
C1 [Corbett, John D.] Iowa State Univ, Ames Lab DOE, Ames, IA 50011 USA.
Iowa State Univ, Dept Chem, Ames, IA 50011 USA.
RP Corbett, JD (reprint author), Iowa State Univ, Ames Lab DOE, Ames, IA 50011 USA.
EM jdc@ameslab.gov
FU Office of the Basic Energy Sciences, Materials Sciences Division, U.S.
Department of Energy (DOE); Iowa State University [DE-AC02-07Ch 11358]
FX This research was supported by the Office of the Basic Energy Sciences,
Materials Sciences Division, U.S. Department of Energy (DOE). The Ames
Laboratory is operated for DOE by Iowa State University under Contract
No. DE-AC02-07Ch 11358.
NR 44
TC 9
Z9 9
U1 1
U2 9
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 OCT 20
PY 2008
VL 47
IS 20
BP 9344
EP 9350
DI 10.1021/ic8006124
PG 7
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 359LQ
UT WOS:000259988600030
PM 18795775
ER
PT J
AU Jardin, SC
Bateman, G
Hammett, GW
Ku, LP
AF Jardin, S. C.
Bateman, G.
Hammett, G. W.
Ku, L. P.
TI On 1D diffusion problems with a gradient-dependent diffusion coefficient
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE Numerical methods; Newtons method; Diffusion equations; Magnetic fusion
ID TRANSPORT MODEL
C1 [Jardin, S. C.; Hammett, G. W.; Ku, L. P.] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA.
[Bateman, G.] Lehigh Univ, Dept Phys, Bethlehem, PA 18015 USA.
RP Jardin, SC (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM jardin@pppl.gov
RI Jardin, Stephen/E-9392-2010; Hammett, Gregory/D-1365-2011
OI Hammett, Gregory/0000-0003-1495-6647
FU US DoE [DE-AC02-76CH0307]
FX The authors acknowledge helpful conversations with Drs. X.C. Cai, D.
Keyes, H. St. John and D. McCune. We thank Prof. A.H. Kritz for his
encouragement in publishing this technique. This work was supported by
US DoE contract DE-AC02-76CH0307.
NR 12
TC 5
Z9 5
U1 3
U2 4
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 OCT 20
PY 2008
VL 227
IS 20
BP 8769
EP 8775
DI 10.1016/j.jcp.2008.06.032
PG 7
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 363LB
UT WOS:000260267700001
ER
PT J
AU Gyrya, V
Lipnikov, K
AF Gyrya, Vitaliy
Lipnikov, Konstantin
TI High-order mimetic finite difference method for diffusion problems on
polygonal meshes
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE Diffusion equation; Locally conservative method; Mimetic discretization;
High-order method; Polygonal mesh
ID POLYHEDRAL MESHES; APPROXIMATIONS
AB The mimetic finite difference (MFD) methods mimic important properties of physical and mathematical models. As a result, conservation laws, solution symmetries, and the fundamental identities of the vector and tensor calculus are held for discrete models. The MFD methods retain these attractive properties for full tensor coefficients and arbitrary polygonal meshes which may include non-convex and degenerate elements. The existing MFD methods for solving diffusion-type problems are second-order accurate for the conservative variable (temperature, pressure, energy, etc.) and only first-order accurate for its flux. We developed new high-order MFD methods which are second-order accurate for both scalar and vector variables. The second-order convergence rates are demonstrated with a few numerical examples on randomly perturbed quadrilateral and polygonal meshes. Published by Elsevier Inc.
C1 [Gyrya, Vitaliy] Penn State Univ, Dept Math, University Pk, PA 16802 USA.
[Lipnikov, Konstantin] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Gyrya, V (reprint author), Penn State Univ, Dept Math, University Pk, PA 16802 USA.
EM gyrya@math.psu.edu; lipnikov@lanl.gov
OI Gyrya, Vitaliy/0000-0002-5083-8878
NR 18
TC 37
Z9 37
U1 0
U2 3
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 OCT 20
PY 2008
VL 227
IS 20
BP 8841
EP 8854
DI 10.1016/j.jcp.2008.06.028
PG 14
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 363LB
UT WOS:000260267700006
ER
PT J
AU Philip, B
Chacon, L
Pernice, M
AF Philip, Bobby
Chacon, Luis
Pernice, Michael
TI Implicit adaptive mesh refinement for 2D reduced resistive
magnetohydrodynamics
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE Adaptive mesh refinement; Newton-Krylov; Implicit methods;
Magnetohydrodynamics; Multilevel solvers
ID PARTIAL-DIFFERENTIAL-EQUATIONS; NAVIER-STOKES EQUATIONS; INEXACT NEWTON
METHODS; FINITE-ELEMENT-METHOD; MAGNETIC ISLANDS; KRYLOV METHODS;
SYSTEMS; MHD; SIMULATIONS; ALGORITHM
AB An implicit structured adaptive mesh refinement (SAMR) solver for 2D reduced magnetohydrodynamics (MHD) is described. The time-implicit discretization is able to step over fast normal modes, while the spatial adaptivity resolves thin, dynamically evolving features. A Jacobian-free Newton-Krylov method is used for the nonlinear solver engine. For preconditioning, we have extended the optimal "physics-based" approach developed in [L. Chacon, D.A. Knoll, J.M. Finn, An implicit, nonlinear reduced resistive MHD solver, J. Comput. Phys. 178 (2002) 15-36] (which employed multigrid solver technology in the preconditioner for scalability) to SAMR grids using the well-known Fast Adaptive Composite grid (FAC) method [S. McCormick, Multilevel Adaptive Methods for Partial Differential Equations, SIAM, Philadelphia, P& 1989]. A grid convergence study demonstrates that the solver performance is independent of the number of grid levels and only depends on the finest resolution considered, and that it scales well with grid refinement. The study of error generation and propagation in our SAMR implementation demonstrates that high-order (cubic) interpolation during regridding, combined with a robustly damping second-order temporal scheme such as BDF2, is required to minimize impact of grid errors at coarse-fine interfaces on the overall error of the computation for this MHD application. We also demonstrate that our implementation features the desired property that the overall numerical error is dependent only on the finest resolution level considered, and not on the base-grid resolution or on the number of refinement levels present during the simulation. We demonstrate the effectiveness of the tool on several challenging problems. (c) 2008 Elsevier Inc. All rights reserved.
C1 [Philip, Bobby; Chacon, Luis] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Pernice, Michael] Idaho Natl Lab, Ctr Adv Modeling & Simulat, Idaho Falls, ID 83415 USA.
RP Philip, B (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM bphilip@lanl.gov; chacon@lanl.gov; michael.pernice@inl.gov
OI Philip, Bobby/0000-0001-6716-3515; Chacon, Luis/0000-0002-4566-8763
FU Los Alamos National Laboratory; DOE [DE-AC52-06NA25396]; DOE Office;
ASCR program in Applied Mathematical Sciences
FX The authors acknowledge useful discussions with D.A. Knoll. The work was
funded by the Los Alamos Directed Research and Development program at
Los Alamos National Laboratory, operated for DOE under contract No.
DE-AC52-06NA25396, and by the DOE Office of ASCR program in Applied
Mathematical Sciences.
NR 61
TC 8
Z9 10
U1 0
U2 4
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 OCT 20
PY 2008
VL 227
IS 20
BP 8855
EP 8874
DI 10.1016/j.jcp.2008.06.029
PG 20
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 363LB
UT WOS:000260267700007
ER
PT J
AU Chantis, AN
Belashchenko, KD
Tsymbal, EY
Sus, IV
AF Chantis, Athanasios N.
Belashchenko, Kirill D.
Tsymbal, Evgeny Y.
Sus, Inna V.
TI THE IMPORTANCE OF Fe SURFACE STATES FOR MAGNETIC TUNNEL JUNCTION BASED
SPINTRONIC DEVICES
SO MODERN PHYSICS LETTERS B
LA English
DT Review
DE Spin transport through interfaces; electrical injection of spin
polarized carriers; spin polarized transport in semiconductors;
spintronics; first principles electron transport methods; tunneling
anisotropic magnetoresistance; metal-semiconductor-metal structures;
magnetic tunnel junctions; Rashba splitting
ID TIN-ORBITAL METHOD; ELECTRONIC-STRUCTURE; SPIN INJECTION;
BAND-STRUCTURE; SEMICONDUCTOR; TRANSPORT; BARRIER; FE(001)
AB In this article we give a review of our recent theoretical studies of the influence of Fe(001) surface (interface) states on spin-polarized electron transport across magnetic tunnel junctions with Fe electrodes. We show that minority-spin surface (interface) states are responsible for at least two effects which are important for spin electronics. First, they can produce a sizable tunneling anisotropic magnetoresistance in magnetic tunnel junctions with a single Fe electrode. The effect is driven by a Rashba shift of the resonant surface band when the magnetization changes direction. This can introduce a new class of spintronic devices, namely, tunneling magnetoresistance junctions with a single ferro-magnetic electrode. Second, in Fe/GaAs(001) magnetic tunnel junctions minority-spin interface states produce a strong dependence of the tunneling current spin polarization on applied electrical bias. A dramatic sign reversal within a voltage range of just a few tenths of an eV is predicted. This explains the observed sign reversal of spin polarization in recent experiments of electrical spin injection in Fe/GaAs(001) and related reversal of tunneling magnetoresistance through vertical Fe/GaAs/Fe trilayers.
C1 [Chantis, Athanasios N.; Sus, Inna V.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87544 USA.
[Belashchenko, Kirill D.; Tsymbal, Evgeny Y.] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA.
[Belashchenko, Kirill D.; Tsymbal, Evgeny Y.] Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA.
[Sus, Inna V.] Arizona State Univ, Sch Mat, Tempe, AZ 85287 USA.
RP Chantis, AN (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87544 USA.
EM achantis@lanl.gov
RI Belashchenko, Kirill/A-9744-2008; Tsymbal, Evgeny/G-3493-2013;
OI Belashchenko, Kirill/0000-0002-8518-1490; Chantis,
Athanasios/0000-0001-7933-0579
FU DOE Office of Basic Energy Sciences [08SCPE973]
FX The work at Los Alamos National Laboratory was supported by the DOE
Office of Basic Energy Sciences under Work Proposal Number 08SCPE973. K.
Belashchenko is supported by the Nebraska Research Initiative and is a
Cottrell Scholar of Research Corporation.
NR 40
TC 4
Z9 4
U1 2
U2 12
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0217-9849
EI 1793-6640
J9 MOD PHYS LETT B
JI Mod. Phys. Lett. B
PD OCT 20
PY 2008
VL 22
IS 26
BP 2529
EP 2551
DI 10.1142/S0217984908017060
PG 23
WC Physics, Applied; Physics, Condensed Matter; Physics, Mathematical
SC Physics
GA 371AQ
UT WOS:000260804600001
ER
PT J
AU Busuttil, RA
Munoz, DP
Garcia, AM
Rodier, F
Kim, WH
Suh, Y
Hasty, P
Campisi, J
Vijg, J
AF Busuttil, Rita A.
Munoz, Denise P.
Garcia, Ana Maria
Rodier, Francis
Kim, Woo Ho
Suh, Yousin
Hasty, Paul
Campisi, Judith
Vijg, Jan
TI Effect of Ku80 Deficiency on Mutation Frequencies and Spectra at a LacZ
Reporter Locus in Mouse Tissues and Cells
SO PLOS ONE
LA English
DT Article
AB Non-homologous end joining (NHEJ) is thought to be an important mechanism for preventing the adverse effects of DNA double strand breaks (DSBs) and its absence has been associated with premature aging. To investigate the effect of inactivated NHEJ on spontaneous mutation frequencies and spectra in vivo and in cultured cells, we crossed a Ku80-deficient mouse with mice harboring a lacZ-plasmid-based mutation reporter. We analyzed various organs and tissues, as well as cultured embryonic fibroblasts, for mutations at the lacZ locus. When comparing mutant with wild-type mice, we observed a significantly higher number of genome rearrangements in liver and spleen and a significantly lower number of point mutations in liver and brain. The reduced point mutation frequency was not due to a decrease in small deletion mutations thought to be a hallmark of NHEJ, but could be a consequence of increased cellular responses to unrepaired DSBs. Indeed, we found a substantial increase in persistent 53BP1 and gamma H2AX DNA damage foci in Ku80(-/-) as compared to wild-type liver. Treatment of cultured Ku80-deficient or wild-type embryonic fibroblasts, either proliferating or quiescent, with hydrogen peroxide or bleomycin showed no differences in the number or type of induced genome rearrangements. However, after such treatment, Ku80-deficient cells did show an increased number of persistent DNA damage foci. These results indicate that Ku80-dependent repair of DNA damage is predominantly error-free with the effect of alternative more error-prone pathways creating genome rearrangements only detectable after extended periods of time, i.e., in young adult animals. The observed premature aging likely results from a combination of increased cellular senescence and an increased load of stable, genome rearrangements.
C1 [Busuttil, Rita A.; Munoz, Denise P.; Campisi, Judith; Vijg, Jan] Buck Inst Age Res, Novato, CA USA.
[Garcia, Ana Maria] Univ Texas, Dept Biol, San Antonio, TX USA.
[Rodier, Francis; Campisi, Judith] Lawrence Berkeley Natl Lab, Life Sci Div, Berkeley, CA USA.
[Kim, Woo Ho] Seoul Natl Univ, Coll Med, Dept Pathol, Seoul 151, South Korea.
[Suh, Yousin] Albert Einstein Coll Med, Dept Med, Bronx, NY USA.
[Hasty, Paul] Univ Texas, Hlth Sci Ctr, Dept Mol Med, San Antonio, TX USA.
RP Busuttil, RA (reprint author), Peter MacCallum Canc Ctr, Melbourne, Vic, Australia.
EM jvijg@aecom.yu.edu
RI Kim, Wooho/G-3703-2011; Seoul National University, Pathology/B-6702-2012
FU NIH [AG17242]
FX This research was supported by NIH program project grant AG17242.
NR 40
TC 10
Z9 10
U1 0
U2 2
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 OCT 20
PY 2008
VL 3
IS 10
AR e3458
DI 10.1371/journal.pone.0003458
PG 10
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 432IB
UT WOS:000265125600016
PM 18941635
ER
PT J
AU Jordanova, VK
Albert, J
Miyoshi, Y
AF Jordanova, V. K.
Albert, J.
Miyoshi, Y.
TI Relativistic electron precipitation by EMIC waves from self-consistent
global simulations
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID LINEAR DIFFUSION-COEFFICIENTS; PITCH-ANGLE DIFFUSION; ION-CYCLOTRON
WAVES; RADIATION BELT PARTICLES; RING CURRENT IONS; GEOMAGNETIC STORMS;
MAGNETIC STORM; INNER MAGNETOSPHERE; THERMAL PLASMA; MODEL
AB We study the effect of electromagnetic ion cyclotron (EMIC) wave scattering on radiation belt electrons during the large geomagnetic storm of 21 October 2001 with minimum Dst = -187 nT. We use our global physics-based model, which solves the kinetic equation for relativistic electrons and H+, O+, and He+ ions as a function of radial distance in the equatorial plane, magnetic local time, energy, and pitch angle. The model includes time-dependent convective transport and radial diffusion and all major loss processes and is coupled with a dynamic plasmasphere model. We calculate the excitation of EMIC waves self-consistently with the evolving plasma populations. Particle interactions with these waves are evaluated according to quasi-linear theory, using diffusion coefficients for a multicomponent plasma and including not only field-aligned but also oblique EMIC wave propagation. The pitch angle diffusion coefficients increase from 0 degrees to similar to 60 degrees during specific storm conditions. Pitch angle scattering by EMIC waves causes significant loss of radiation belt electrons at E >= 1 MeV and precipitation into the atmosphere. However, the relativistic electron flux dropout during the main phase at large L >= 5 is due mostly to outward radial diffusion, driven by the flux decrease at geosynchronous orbit. We show first results from global simulations indicating significant relativistic electron precipitation within regions of enhanced EMIC instability, whose location varies with time but is predominantly in the afternoon-dusk sector. The precipitating electron fluxes are usually collocated with precipitating ion fluxes but occur at variable energy range and magnitude. The minimum resonant energy increases at low L and relativistic electrons at E <= 1 MeV do not precipitate at L < 3 during this storm.
C1 [Jordanova, V. K.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Albert, J.] USAF, Res Lab, Bedford, MA 01731 USA.
[Miyoshi, Y.] Nagoya Univ, Solarterr Environm Lab, Nagoya, Aichi 4648601, Japan.
RP Jordanova, VK (reprint author), Los Alamos Natl Lab, ISR 1 MS D466, Los Alamos, NM 87545 USA.
EM vania@lanl.gov
RI Miyoshi, Yoshizumi/B-5834-2015;
OI Miyoshi, Yoshizumi/0000-0001-7998-1240; Albert, Jay/0000-0001-9494-7630;
Jordanova, Vania/0000-0003-0475-8743
FU Ministry of Education, Science, Sports and Culture, Japan [17740326]
FX Work at Los Alamos was conducted under the auspices of the U. S.
Department of Energy, with partial support from the NASA LWS and GI
programs, from the NSF/GEM program, and from a LANL Directed Research
and Development grant. Y.M. was supported by grant-in-aid for scientific
research (17740326) from the Ministry of Education, Science, Sports and
Culture, Japan.
NR 56
TC 103
Z9 103
U1 2
U2 7
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 OCT 18
PY 2008
VL 113
AR A00A10
DI 10.1029/2008JA013239
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 362EF
UT WOS:000260180300001
ER
PT J
AU Chaudhuri, A
Rajaram, H
Viswanathan, H
AF Chaudhuri, A.
Rajaram, H.
Viswanathan, H.
TI Alteration of fractures by precipitation and dissolution in gradient
reaction environments: Computational results and stochastic analysis
SO WATER RESOURCES RESEARCH
LA English
DT Article
ID VARIABLE-APERTURE FRACTURES; SINGLE FRACTURE; INTERNAL STRUCTURE;
REYNOLDS-EQUATION; SOLUTE TRANSPORT; FLUID-FLOW; ROCK; GROWTH; MODEL;
PERMEABILITY
AB Precipitation and dissolution reactions within fractures alter apertures, which in turn affects their flow and transport properties. Different aperture alteration patterns occur in different flow and reaction regimes, and they are also influenced by preferential flow resulting from spatial variations in the aperture. We consider the alteration of variable-aperture fractures in gradient reaction regimes, where fluids are in chemical equilibrium with a mineral everywhere but precipitation and dissolution are driven by solubility gradients associated with temperature variations. The temperature field is defined by a geothermal gradient corresponding to a conduction-dominated heat transfer regime. Monte Carlo simulations on computer-generated aperture fields vividly illustrate pattern formation resulting from two-way feedback between fluid flow and reactive alteration. In dissolution-controlled systems, distinct dissolution channels develop along the dominant flow direction, while elongated precipitate bodies form perpendicular to the mean flow direction in precipitation-controlled systems. Aperture variability accelerates the increase and decrease of effective transmissivity by dissolution and precipitation, respectively. The dominance of precipitation versus dissolution is determined by the angle between the mean hydraulic gradient and solubility/temperature gradient. Development of pronounced anisotropy with oriented elongate features is the key feature of aperture alteration in gradient reaction regimes. A stochastic analysis is developed, which consistently predicts general trends in the aperture field during reactive alteration, including the mean, variance, and spatial covariance structure. Our results are relevant to understanding the long-term diagenetic evolution of fractures in conduction-dominated heat transfer regimes and related problems such as emplacement of ocean bed methane hydrates.
C1 [Chaudhuri, A.; Rajaram, H.] Univ Colorado, Dept Civil Environm & Architectural Engn, Boulder, CO 80309 USA.
[Viswanathan, H.] Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
RP Chaudhuri, A (reprint author), Univ Colorado, Dept Civil Environm & Architectural Engn, Boulder, CO 80309 USA.
EM hari@colorado.edu
RI Chaudhuri, Abhijit/D-1175-2013
FU Institute for Geophysics and Planetary Physics at Los Alamos National
Laboratory [IGPP Geo 1714]
FX We gratefully acknowledge financial support from the Institute for
Geophysics and Planetary Physics at Los Alamos National Laboratory
(grant IGPP Geo 1714).
NR 34
TC 9
Z9 9
U1 0
U2 15
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 OCT 18
PY 2008
VL 44
IS 10
AR W10410
DI 10.1029/2008WR006982
PG 19
WC Environmental Sciences; Limnology; Water Resources
SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water
Resources
GA 362EY
UT WOS:000260182200003
ER
PT J
AU Choi, CL
Claridge, SA
Garner, EC
Alivisatos, AP
Mullins, RD
AF Choi, Charina L.
Claridge, Shelley A.
Garner, Ethan C.
Alivisatos, A. Paul
Mullins, R. Dyche
TI Protein-nanocrystal conjugates support a single filament polymerization
model in R1 plasmid segregation
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID PROKARYOTIC ACTIN HOMOLOG; DNA SEGREGATION; ESCHERICHIA-COLI; COMPLEX;
GOLD; NANOPARTICLE; CHROMOSOME; PARM
AB To ensure inheritance by daughter cells, many low-copy number bacterial plasmids, including the R1 drug-resistance plasmid, encode their own DNA segregation systems. The par operon of plasmid R1 directs construction of a simple spindle structure that converts free energy of polymerization of an actin-like protein, ParM, into work required to move sister plasmids to opposite poles of rod-shaped cells. The structures of individual components have been solved, but little is known about the ultrastructure of the R1 spindle. To determine the number of ParM filaments in a minimal R1 spindle, we used DNA-gold nanocrystal conjugates as mimics of the R1 plasmid. We found that each end of a single polar ParM filament binds to a single ParR/parC-gold complex, consistent with the idea that ParM filaments bind in the hollow core of the ParR/parC ring complex. Our results further suggest that multifilament spindles observed in vivo are associated with clusters of plasmids segregating as a unit.
C1 [Garner, Ethan C.; Mullins, R. Dyche] Univ Calif San Francisco, Dept Cellular & Mol Pharmacol, San Francisco, CA 94143 USA.
[Choi, Charina L.; Claridge, Shelley A.; Alivisatos, A. Paul] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Choi, Charina L.; Claridge, Shelley A.; Alivisatos, A. Paul] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Mullins, RD (reprint author), Univ Calif San Francisco, Dept Cellular & Mol Pharmacol, 600 16th St, San Francisco, CA 94143 USA.
EM dyche@mullinslab.ucsf.edu
RI Garner, Ethan/J-4025-2014; Alivisatos , Paul /N-8863-2015
OI Garner, Ethan/0000-0003-0141-3555; Alivisatos , Paul
/0000-0001-6895-9048
FU National Institutes of Health [PN2 EY016546, 5R01GM079556-03];
University of California San Francisco/University of California Berkeley
Nanomedicine Development Center; University of California San Francisco;
Sandler Family Supporting Foundation; Office of Science, Office of Basic
Energy Sciences, of the United States Department of Energy
[DE-AC02-05CH11231]
FX This work was supported, in whole or in part, by National Institutes of
Health Grant PN2 EY016546 to the University of California San
Francisco/University of California Berkeley Nanomedicine Development
Center as administered through the University of California San
Francisco. This work was also supported by grants from the Sandler
Family Supporting Foundation, National Institutes of Health Grant
5R01GM079556-03, and the Director, Office of Science, Office of Basic
Energy Sciences, of the United States Department of Energy under
Contract DE-AC02-05CH11231 (to R. D. M.). The costs of publication of
this article were defrayed in part by the payment of page charges. This
article must therefore be hereby marked "advertisement" in accordance
with 18 U. S. C. Section 1734 solely to indicate this fact.
NR 22
TC 14
Z9 14
U1 0
U2 7
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 OCT 17
PY 2008
VL 283
IS 42
BP 28081
EP 28086
DI 10.1074/jbc.M803833200
PG 6
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 359EN
UT WOS:000259969300010
PM 18658133
ER
PT J
AU Alkhaled, AA
Michalak, AM
Kawa, SR
Olsen, SC
Wang, JW
AF Alkhaled, Alanood A.
Michalak, Anna M.
Kawa, S. Randolph
Olsen, Seth C.
Wang, Jih-Wang
TI A global evaluation of the regional spatial variability of column
integrated CO2 distributions
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID FSI WFM-DOAS; ATMOSPHERIC CO2; CARBON-DIOXIDE; SCALE FLUXES; SCIAMACHY;
MODEL; CONTINENT; SATELLITE; TRANSPORT; NORTHERN
AB Satellites, such as the Orbiting Carbon Observatory (OCO), are expected to provide global measurements of column-averaged carbon dioxide (CO2) dry-air mole fraction (X-CO2) with the potential of improving the scientific understanding of regional carbon cycle processes and budgets. The satellite data products, however, are expected to have large data gaps due to the satellite track and geophysical limitations (e.g., clouds and aerosols). The satellite data will also be representative of the X-CO2 distribution at the spatial scale of satellite footprints, which is smaller than the resolution of typical transport or process models. Assessing the ability of the retrieved soundings to capture X-CO2 variability over different regions and times, evaluating the representation error associated with using the retrieved X-CO2 product to represent X-CO2 at typical model resolutions, and filling data gaps while providing an estimate of the associated uncertainty all require the evaluation of the spatial variability of X-CO2. In this study, the global spatial covariance structure of X-CO2 is evaluated regionally using CO2 concentrations simulated using the MATCH/CASA model. Results show that regional and temporal changes in the X-CO2 distribution caused by seasonal changes in surface fluxes and transport produce a spatially and temporally variable X-CO2 covariance structure. The effects of model setup and the relatively low resolution of the MATCH/CASA model on the evaluated X-CO2 covariance structure are assessed by comparing the MATCH/CASA results to the spatial variability inferred from the higher-resolution PCTM/GEOS-4 global model, the SiB-RAMS regional model, and aircraft campaign point observations. The comparison with the higher-resolution models and aircraft data shows good agreement with MATCH/CASA results, thus indicating that the presented results provide an adequate representation of X-CO2 variability as will be measured by satellites such as OCO.
C1 [Alkhaled, Alanood A.; Michalak, Anna M.] Univ Michigan, Dept Civil & Environm Engn, Ann Arbor, MI 48109 USA.
[Kawa, S. Randolph] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Olsen, Seth C.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Wang, Jih-Wang] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA.
RP Alkhaled, AA (reprint author), Univ Michigan, Dept Civil & Environm Engn, Ann Arbor, MI 48109 USA.
EM alanood@umich.edu; amichala@umich.edu
RI Kawa, Stephan/E-9040-2012
FU NASA [NNX08AJ92G]; Kuwait University Scholarship Committee; NASA Carbon
Cycle Science
FX The research described in this paper was partially performed for the
Orbiting Carbon Observatory Project at the Jet Propulsion Laboratory,
California Institute of Technology, under a contract with NASA.
Additional support was provided by NASA under grant NNX08AJ92G "Mapping
Global CO2: Development and Application of Geostatistical
Algorithms for Gap Filling and Uncertainty Assessment for the Orbiting
Carbon Observatory'' issued through the ROSES A. 3 Carbon Cycle Science
Program. Kuwait University Scholarship Committee provided partial
funding for the work presented in this study. The authors gratefully
acknowledge the helpful input provided by Charles Miller (JPL) on early
drafts of this manuscript. The PCTM work was enabled by G. J. Collatz
and Z. Zhu and was supported by NASA Carbon Cycle Science. This paper
was greatly improved as a result of detailed input provided by three
anonymous reviewers.
NR 49
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U1 1
U2 7
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD OCT 17
PY 2008
VL 113
IS D20
AR D20303
DI 10.1029/2007JD009693
PG 17
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 362DK
UT WOS:000260178200004
ER
PT J
AU Slingo, A
Bharmal, NA
Robinson, GJ
Settle, JJ
Allan, RP
White, HE
Lamb, PJ
Lele, MI
Turner, DD
McFarlane, S
Kassianov, E
Barnard, J
Flynn, C
Miller, M
AF Slingo, A.
Bharmal, N. A.
Robinson, G. J.
Settle, J. J.
Allan, R. P.
White, H. E.
Lamb, P. J.
Lele, M. Issa
Turner, D. D.
McFarlane, S.
Kassianov, E.
Barnard, J.
Flynn, C.
Miller, M.
TI Overview of observations from the RADAGAST experiment in Niamey, Niger:
Meteorology and thermodynamic variables
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID WEST-AFRICA; CIRCULATION; CLIMATE; VARIABILITY; ATLANTIC; PROJECT; DUST
AB An overview is presented of the meteorological and thermodynamic data obtained during the Radiative Atmospheric Divergence using Atmospheric Radiation Measurement (ARM) Mobile Facility, Geostationary Earth Radiation Budget (GERB) data, and African Monsoon Multidisciplinary Analysis (AMMA) stations (RADAGAST) experiment in Niamey, Niger, in 2006. RADAGAST combined data from the ARM Program Mobile Facility (AMF) at Niamey airport with broadband satellite data from the GERB instrument on Meteosat-8. The experiment was conducted in collaboration with the AMMA project. The focus in this paper is on the variations through the year of key surface and atmospheric variables. The seasonal advance and retreat of the Intertropical Front and the seasonal changes in near-surface variables and precipitation in 2006 are discussed and contrasted with the behavior in 2005 and with long-term averages. Observations from the AMF at Niamey airport are used to document the evolution of near-surface variables and of the atmosphere above the site. There are large seasonal changes in these variables, from the arid and dusty conditions typical of the dry season to the much moister and more cloudy wet season accompanying the arrival and intensification of the West African monsoon. Back trajectories show the origin of the air sampled at Niamey and profiles for selected case studies from rawinsondes and from a micropulse lidar at the AMF site reveal details of typical atmospheric structures. Radiative fluxes and divergences are discussed in the second part of this overview, and the subsequent papers in this special section explore other aspects of the measurements and of the associated modeling.
C1 [Slingo, A.; Bharmal, N. A.; Robinson, G. J.; Settle, J. J.; Allan, R. P.; White, H. E.] Univ Reading, Environm Syst Sci Ctr, Reading RG6 6AL, Berks, England.
[McFarlane, S.; Kassianov, E.; Barnard, J.; Flynn, C.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Lamb, P. J.] Univ Oklahoma, CIMMS, Norman, OK 73072 USA.
[Miller, M.] Rutgers State Univ, Dept Environm Sci, New Brunswick, NJ 08901 USA.
[Turner, D. D.] Univ Wisconsin, Ctr Space Sci & Engn, Madison, WI 53706 USA.
RP Slingo, A (reprint author), Univ Reading, Environm Syst Sci Ctr, Reading RG6 6AL, Berks, England.
EM as@mail.nerc-essc.ac.uk
RI McFarlane, Sally/C-3944-2008; Allan, Richard/B-5782-2008
OI Allan, Richard/0000-0003-0264-9447
FU Office of Biological and Environment Research, Office of Science, U.S.
Department of Energy; UK Natural Environment Research Council; Office of
Science (BER), U.S. Department of Energy [DE-FG02-05ER64062,
DE-FG02-06ER64167, DE-AC06-76RL01830]; Environmental Sciences Department
at Rutgers University; Department of Energy through Brookhaven Science
Associates, LLC [DE-AC02-98CH10866]
FX This paper is a combined UK-USA contribution to the multinational
African Monsoon Multidisciplinary Analysis (AMMA) Project and the
Atmospheric Radiation Measurement (ARM) Program of the U.S. Department
of Energy. The deployment of the ARM Mobile Facility (AMF) in Niger
during 2006 was funded by the Office of Biological and Environment
Research, Office of Science, U.S. Department of Energy. Analyses of the
AMF and other data were performed at the University of Reading with
support by the UK Natural Environment Research Council; at the
University of Oklahoma with support by the Office of Science (BER), U.S.
Department of Energy, grant DE-FG02-05ER64062; at the University of
Wisconsin-Madison with support by the Office of Science (BER), U.S.
Department of Energy, grant DE-FG02-06ER64167; and at the Pacific
Northwest National Laboratory with support by the Office of Science
(BER), U. S. Department of Energy under contract DE-AC06-76RL01830. M.
Miller is funded by the Environmental Sciences Department at Rutgers
University and the Department of Energy through Brookhaven Science
Associates, LLC, under contract DE-AC02-98CH10866. The Pacific Northwest
National Laboratory is operated by Batelle for the U.S. Department of
Energy. Long-term meteorological data were provided by the National
Weather Services of Mali, Burkina Faso, Ghana, Benin, Niger, Nigeria,
and Chad. The AMMA rain gauge data used in section 3.1 were obtained
from the official AMMA data archive. The trajectory calculations were
performed by Rick Wagener of the ARM External Data Center at Brookhaven
National Laboratory. We thank EUMETSAT for providing limited area
subsets of the SEVIRI radiances in near-real time. It is also a pleasure
to reiterate the debt owed to the individuals acknowledged by Miller and
Slingo [2007] for their contributions to making the deployment of the
AMF in Niamey a success. The quantity and quality of the data obtained
from the AMF would not have been possible without their professionalism
and dedication. The constructive suggestions of two formal reviewers
sharpened the manuscript.
NR 29
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U1 0
U2 3
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 OCT 17
PY 2008
VL 113
IS D20
AR D00E01
DI 10.1029/2008JD009909
PG 18
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 362DK
UT WOS:000260178200006
ER
PT J
AU Forster, F
Webb, B
Krukenberg, KA
Tsuruta, H
Agard, DA
Sali, A
AF Foerster, Friedrich
Webb, Benjamin
Krukenberg, Kristin A.
Tsuruta, Hiro
Agard, David A.
Sali, Andrej
TI Integration of small-angle X-ray scattering data into structural
modeling of proteins and their assemblies
SO JOURNAL OF MOLECULAR BIOLOGY
LA English
DT Article
DE small-angle X-ray scattering; quaternary structure; macromolecular
assembly modeling; statistical potentials; protein structure prediction
ID BIOLOGICAL MACROMOLECULES; MOLECULAR-DYNAMICS; DENSITY MAPS; REFINEMENT;
DOCKING; CONFORMATIONS; DIFFRACTION; RESTRAINTS; PREDICTION; DOMAIN
AB A major challenge in structural biology is to determine the configuration of domains and proteins in multidomain proteins and assemblies, respectively. All available data should be considered to maximize the accuracy and precision of these models. Small-angle X-ray scattering (SAXS) efficiently provides low-resolution experimental data about the shapes of proteins and their assemblies. Thus, we integrated SANS profiles into our software for modeling proteins and their assemblies by satisfaction of spatial restraints. Specifically, we modeled the quaternary structures of multidomain proteins with structurally defined rigid domains as well as quaternary structures of binary complexes of structurally defined rigid proteins. In addition to SAXS profiles and the component structures, we used stereochemical restraints and an atomic distance-dependent statistical potential. The scoring function is optimized by a biased Monte Carlo protocol, including quasi-Newton and simulated annealing schemes. The final prediction corresponds to the best scoring solution in the largest cluster of many independently calculated solutions. To quantify how well the quaternary structures are determined based on their SANS profiles, we used a benchmark of 12 simulated examples as well as an experimental SANS profile of the homotetramer D-xylose isomerase. Optimization of the SAXS-dependent scoring function generally results in accurate models, if sufficiently precise approximations for the constituent rigid bodies are available; otherwise, the best scoring models can have significant errors. Thus, SAXS profiles can play a useful role in the structural characterization of proteins and assemblies if they are combined with additional data and used judiciously. Our integration of a SANS profile into modeling by satisfaction of spatial restraints will facilitate further integration of different kinds of data or structure determination of proteins and their assemblies. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Foerster, Friedrich; Webb, Benjamin; Sali, Andrej] Univ Calif San Francisco, Dept Bioengn & Therapeut Sci, San Francisco, CA 94158 USA.
[Foerster, Friedrich; Webb, Benjamin; Sali, Andrej] Univ Calif San Francisco, Dept Pharmaceut Chem, San Francisco, CA 94158 USA.
[Foerster, Friedrich; Webb, Benjamin; Sali, Andrej] Univ Calif San Francisco, Calif Inst Quantitat Biosci QB3, San Francisco, CA 94158 USA.
[Krukenberg, Kristin A.] Univ Calif San Francisco, Grad Program Chem & Chem Biol, San Francisco, CA 94158 USA.
[Tsuruta, Hiro] Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
[Agard, David A.] Univ Calif San Francisco, Howard Hughes Med Inst, San Francisco, CA 94158 USA.
[Agard, David A.] Univ Calif San Francisco, Dept Biochem & Biophys, San Francisco, CA 94158 USA.
RP Forster, F (reprint author), Univ Calif San Francisco, Dept Bioengn & Therapeut Sci, UCSF MC 2552,Byers Hall Mission Bay,Suite 503B,17, San Francisco, CA 94158 USA.
EM frido@salilab.org; agard@msg.ucsf.edu; sali@salilab.org
RI Foerster, Friedrich/D-3710-2009
OI Foerster, Friedrich/0000-0002-6044-2746
FU Human Frontier Science Project Organization; National Defense Science
and Engineering; Stanford Synchrotron Radiation Laboratory; Department
of Energy Basic Energy Sciences Program, and the Stanford Synchrotron
Radiation Laboratory Structural Molecular Biology Program; Department of
Energy Office of Biological and Environmental Research; National
Institutes of Health National Center for Research Resources Biomedical
Technology Program [P41 RR001209]; Howard Hughes Medical Institute;
University of California Discovery [bio03-10401/Agard]; Sandler Family
Supporting Foundation; National Institutes of Health [R01 GM54762, R01
GM083960, U54 RR022220, PN2 EY016525]; National Science Foundation
[EIA-032645, IIS-0705196]; Hewlett-Packard, NetApps, IBM, and Intel
FX F.F. is grateful for a long-term fellowship from the Human Frontier
Science Project Organization. K.A. K. was supported by a National
Defense Science and Engineering Graduate fellowship. The Stanford
Synchrotron Radiation Laboratory is funded by the Department of Energy
Basic Energy Sciences Program, and the Stanford Synchrotron Radiation
Laboratory Structural Molecular Biology Program is supported by the
Department of Energy Office of Biological and Environmental Research and
the National Institutes of Health National Center for Research Resources
Biomedical Technology Program through grant P41 RR001209. D.A.A. has
been supported by the Howard Hughes Medical Institute; D.A.A. and A.S.
have been supported by a University of California Discovery Grant
(bio03-10401/Agard). A.S. has also been supported by the Sandler Family
Supporting Foundation, the National Institutes of Health (R01 GM54762,
R01 GM083960, U54 RR022220, and PN2 EY016525), the National Science
Foundation (EIA-032645 and IIS-0705196), Hewlett-Packard, NetApps, IBM,
and Intel. We thank Maya Topf, Narayanan Eswar, Frank Alber, Fred Davis,
Min-Yi Shen, and Marc Marti-Renom for fruitful discussions.
NR 53
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U1 2
U2 24
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 OCT 17
PY 2008
VL 382
IS 4
BP 1089
EP 1106
DI 10.1016/j.jmb.2008.07.074
PG 18
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 359YP
UT WOS:000260024500023
PM 18694757
ER
PT J
AU Adare, A
Afanasiev, S
Aidala, C
Ajitanand, NN
Akiba, Y
Al-Bataineh, H
Alexander, J
Aoki, K
Aphecetche, L
Armendariz, R
Aronson, SH
Asai, J
Atomssa, ET
Averbeck, R
Awes, TC
Azmoun, B
Babintsev, V
Bai, M
Baksay, G
Baksay, L
Baldisseri, A
Barish, KN
Barnes, PD
Bassalleck, B
Basye, AT
Bathe, S
Batsouli, S
Baublis, V
Baumann, C
Bazilevsky, A
Belikov, S
Bennett, R
Berdnikov, A
Berdnikov, Y
Bickley, AA
Boissevain, JG
Borel, H
Boyle, K
Brooks, ML
Buesching, H
Bumazhnov, V
Bunce, G
Butsyk, S
Camacho, CM
Campbell, S
Chang, BS
Chang, WC
Charvet, JL
Chernichenko, S
Chiba, J
Chi, CY
Chiu, M
Choi, IJ
Choudhury, RK
Chujo, T
Chung, P
Churyn, A
Cianciolo, V
Citron, Z
Cleven, CR
Cole, BA
Comets, MP
Constantin, P
Csanad, M
Csorgo, T
Dahms, T
Dairaku, S
Das, K
David, G
Deaton, MB
Dehmelt, K
Delagrange, H
Denisov, A
d'Enterria, D
Deshpande, A
Desmond, EJ
Dietzsch, O
Dion, A
Donadelli, M
Drapier, O
Drees, A
Drees, KA
Dubey, AK
Durum, A
Dutta, D
Dzhordzhadze, V
Efremenko, YV
Egdemir, J
Ellinghaus, F
Emam, WS
Engelmore, T
Enokizono, A
En'yo, H
Esumi, S
Eyser, KO
Fadem, B
Fields, DE
Finger, M
Finger, M
Fleuret, F
Fokin, SL
Fraenkel, Z
Frantz, JE
Franz, A
Frawley, AD
Fujiwara, K
Fukao, Y
Fusayasu, T
Gadrat, S
Garishvili, I
Glenn, A
Gong, H
Gonin, M
Gosset, J
Goto, Y
de Cassagnac, RG
Grau, N
Greene, SV
Perdekamp, MG
Gunji, T
Gustafsson, HA
Hachiya, T
Henni, AH
Haegemann, C
Haggerty, JS
Hamagaki, H
Han, R
Harada, H
Hartouni, EP
Haruna, K
Haslum, E
Hayano, R
Heffner, M
Hemmick, TK
Hester, T
He, X
Hiejima, H
Hill, JC
Hobbs, R
Hohlmann, M
Holzmann, W
Homma, K
Hong, B
Horaguchi, T
Hornback, D
Huang, S
Ichihara, T
Ichimiya, R
Ikeda, Y
Imai, K
Imrek, J
Inaba, M
Inoue, Y
Isenhower, D
Isenhower, L
Ishihara, M
Isobe, T
Issah, M
Isupov, A
Ivanischev, D
Jacak, BV
Jia, J
Jin, J
Jinnouchi, O
Johnson, BM
Joo, KS
Jouan, D
Kajihara, F
Kametani, S
Kamihara, N
Kamin, J
Kaneta, M
Kang, JH
Kanou, H
Kapustinsky, J
Kawall, D
Kazantsev, AV
Kempel, T
Khanzadeev, A
Kijima, KM
Kikuchi, J
Kim, BI
Kim, DH
Kim, DJ
Kim, E
Kim, SH
Kinney, E
Kiriluk, K
Kiss, A
Kistenev, E
Kiyomichi, A
Klay, J
Klein-Boesing, C
Kochenda, L
Kochetkov, V
Komkov, B
Konno, M
Koster, J
Kotchetkov, D
Kozlov, A
Kral, A
Kravitz, A
Kubart, J
Kunde, GJ
Kurihara, N
Kurita, K
Kurosawa, M
Kweon, MJ
Kwon, Y
Kyle, GS
Lacey, R
Lai, YS
Lai, YS
Lajoie, JG
Layton, D
Lebedev, A
Lee, DM
Lee, KB
Lee, MK
Lee, T
Leitch, MJ
Leite, MAL
Lenzi, B
Liebing, P
Liska, T
Litvinenko, A
Liu, H
Liu, MX
Li, X
Love, B
Lynch, D
Maguire, CF
Makdisi, YI
Malakhov, A
Malik, MD
Manko, VI
Mannel, E
Mao, Y
Masek, L
Masui, H
Matathias, F
McCumber, M
McGaughey, PL
Means, N
Meredith, B
Miake, Y
Mikes, P
Miki, K
Miller, TE
Milov, A
Mioduszewski, S
Mishra, M
Mitchell, JT
Mitrovski, M
Mohanty, AK
Morino, Y
Morreale, A
Morrison, DP
Moukhanova, TV
Mukhopadhyay, D
Murata, J
Nagamiya, S
Nagata, Y
Nagle, JL
Naglis, M
Nagy, MI
Nakagawa, I
Nakamiya, Y
Nakamura, T
Nakano, K
Newby, J
Nguyen, M
Niita, T
Norman, BE
Nouicer, R
Nyanin, AS
O'Brien, E
Oda, SX
Ogilvie, CA
Ohnishi, H
Okada, H
Okada, K
Oka, M
Omiwade, OO
Onuki, Y
Oskarsson, A
Ouchida, M
Ozawa, K
Pak, R
Pal, D
Palounek, APT
Pantuev, V
Papavassiliou, V
Park, J
Park, WJ
Pate, SF
Pei, H
Peng, JC
Pereira, H
Peresedov, V
Peressounko, DY
Pinkenburg, C
Purschke, ML
Purwar, AK
Qu, H
Rak, J
Rakotozafindrabe, A
Ravinovich, I
Read, KF
Rembeczki, S
Reuter, M
Reygers, K
Riabov, V
Riabov, Y
Roach, D
Roche, G
Rolnick, SD
Romana, A
Rosati, M
Rosendahl, SSE
Rosnet, P
Rukoyatkin, P
Ruzicka, P
Rykov, VL
Sahlmueller, B
Saito, N
Sakaguchi, T
Sakai, S
Sakashita, K
Sakata, H
Samsonov, V
Sato, S
Sato, T
Sawada, S
Sedgwick, K
Seele, J
Seidl, R
Semenov, AY
Semenov, V
Seto, R
Sharma, D
Shein, I
Shevel, A
Shibata, TA
Shigaki, K
Shimomura, M
Shoji, K
Shukla, P
Sickles, A
Silva, CL
Silvermyr, D
Silvestre, C
Sim, KS
Singh, BK
Singh, CP
Singh, V
Skutnik, S
Slunecka, M
Soldatov, A
Soltz, RA
Sondheim, WE
Sorensen, SP
Sourikova, IV
Staley, F
Stankus, PW
Stenlund, E
Stepanov, M
Ster, A
Stoll, SP
Sugitate, T
Suire, C
Sukhanov, A
Sziklai, J
Tabaru, T
Takagi, S
Takagui, EM
Taketani, A
Tanabe, R
Tanaka, Y
Tanida, K
Tannenbaum, MJ
Taranenko, A
Tarjan, P
Themann, H
Thomas, TL
Togawa, M
Toia, A
Tojo, J
Tomasek, L
Tomita, Y
Torii, H
Towell, RS
Tram, VN
Tserruya, I
Tsuchimoto, Y
Vale, C
Valle, H
Vanhecke, HW
Veicht, A
Velkovska, J
Vertesi, R
Vinogradov, AA
Virius, M
Vrba, V
Vznuzdaev, E
Wagner, M
Walker, D
Wang, XR
Watanabe, Y
Wei, F
Wessels, J
White, SN
Winter, D
Woody, CL
Wysocki, M
Xie, W
Yamaguchi, YL
Yamaura, K
Yang, R
Yamaguchi, YL
Yanovich, A
Yasin, Z
Ying, J
Yokkaichi, S
Young, GR
Younus, I
Yushmanov, IE
Zajc, WA
Zaudtke, O
Zhang, C
Zhou, S
Zimanyi, J
Zolin, L
AF Adare, A.
Afanasiev, S.
Aidala, C.
Ajitanand, N. N.
Akiba, Y.
Al-Bataineh, H.
Alexander, J.
Aoki, K.
Aphecetche, L.
Armendariz, R.
Aronson, S. H.
Asai, J.
Atomssa, E. T.
Averbeck, R.
Awes, T. C.
Azmoun, B.
Babintsev, V.
Bai, M.
Baksay, G.
Baksay, L.
Baldisseri, A.
Barish, K. N.
Barnes, P. D.
Bassalleck, B.
Basye, A. T.
Bathe, S.
Batsouli, S.
Baublis, V.
Baumann, C.
Bazilevsky, A.
Belikov, S.
Bennett, R.
Berdnikov, A.
Berdnikov, Y.
Bickley, A. A.
Boissevain, J. G.
Borel, H.
Boyle, K.
Brooks, M. L.
Buesching, H.
Bumazhnov, V.
Bunce, G.
Butsyk, S.
Camacho, C. M.
Campbell, S.
Chang, B. S.
Chang, W. C.
Charvet, J. -L.
Chernichenko, S.
Chiba, J.
Chi, C. Y.
Chiu, M.
Choi, I. J.
Choudhury, R. K.
Chujo, T.
Chung, P.
Churyn, A.
Cianciolo, V.
Citron, Z.
Cleven, C. R.
Cole, B. A.
Comets, M. P.
Constantin, P.
Csanad, M.
Csoergo, T.
Dahms, T.
Dairaku, S.
Das, K.
David, G.
Deaton, M. B.
Dehmelt, K.
Delagrange, H.
Denisov, A.
d'Enterria, D.
Deshpande, A.
Desmond, E. J.
Dietzsch, O.
Dion, A.
Donadelli, M.
Drapier, O.
Drees, A.
Drees, K. A.
Dubey, A. K.
Durum, A.
Dutta, D.
Dzhordzhadze, V.
Efremenko, Y. V.
Egdemir, J.
Ellinghaus, F.
Emam, W. S.
Engelmore, T.
Enokizono, A.
En'yo, H.
Esumi, S.
Eyser, K. O.
Fadem, B.
Fields, D. E.
Finger, M., Jr.
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TI Onset of pi(0) Suppression Studied in Cu plus Cu Collisions at root
s(NN)=22.4, 62.4, and 200 GeV
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID NUCLEUS COLLISIONS; TRANSVERSE-MOMENTUM; ENERGY-LOSS; SPECTRA; MATTER
AB Neutral pion transverse momentum (p(T)) spectra at midrapidity (|y| less than or similar to 0.35) were measured in Cu + Cu collisions at root s(NN) = 22.4, 62.4, and 200 GeV. Relative to pi(0) yields in p + p collisions scaled by the number of inelastic nucleon-nucleon collisions (N-coll) the pi(0) yields for p(T) greater than or similar to 2 GeV/c in central Cu + Cu collisions are suppressed at 62.4 and 200 GeV whereas an enhancement is observed at 22.4 GeV. A comparison with a jet-quenching model suggests that final state parton energy loss dominates in central Cu + Cu collisions at 62.4 and 200 GeV, while the enhancement at 22.4 GeV is consistent with nuclear modifications in the initial state alone.
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RI Taketani, Atsushi/E-1803-2017; seto, richard/G-8467-2011; Csanad,
Mate/D-5960-2012; Wei, Feng/F-6808-2012; Csorgo, Tamas/I-4183-2012;
YANG, BOGEUM/I-8251-2012; Tomasek, Lukas/G-6370-2014; En'yo,
Hideto/B-2440-2015; Hayano, Ryugo/F-7889-2012; HAMAGAKI,
HIDEKI/G-4899-2014; Durum, Artur/C-3027-2014; Sorensen, Soren
/K-1195-2016; Yokkaichi, Satoshi/C-6215-2017; Semenov,
Vitaliy/E-9584-2017
OI Taketani, Atsushi/0000-0002-4776-2315; Tomasek,
Lukas/0000-0002-5224-1936; Hayano, Ryugo/0000-0002-1214-7806; Sorensen,
Soren /0000-0002-5595-5643;
FU Office of Nuclear Physics in DOE Office of Science; NSF; Renaissance
Technologies (U. S.); MEXT and JSPS (Japan); CNPq and FAPESP (Brazil);
NSFC (China); MSMT (Czech Republic); IN2P3/CNRS; CEA (France); BMBF;
DAAD; AvH (Germany); OTKA (Hungary); DAE (India); ISF (Israel); KRF;
KOSEF (Korea); MES; RAS; FAAE (Russia); VR; KAW (Sweden); U. S. CRDF for
the FSU; U. S.-Hungary Fulbright; U. S.-Israel BSF
FX We thank the staff of the Collider-Accelerator and Physics Departments
at BNL for their vital contributions. We thank Ivan Vitev for providing
the jet-quenching calculations. We acknowledge support from the Office
of Nuclear Physics in DOE Office of Science, NSF, and a sponsored
research grant from Renaissance Technologies (U. S.), MEXT and JSPS
(Japan), CNPq and FAPESP (Brazil), NSFC (China), MSMT (Czech Republic),
IN2P3/CNRS, and CEA (France), BMBF, DAAD, and AvH (Germany), OTKA
(Hungary), DAE (India), ISF (Israel), KRF and KOSEF (Korea), MES, RAS,
and FAAE (Russia), VR and KAW (Sweden), U. S. CRDF for the FSU, U.
S.-Hungary Fulbright, and U. S.-Israel BSF.
NR 26
TC 56
Z9 56
U1 6
U2 13
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 OCT 17
PY 2008
VL 101
IS 16
AR 162301
DI 10.1103/PhysRevLett.101.162301
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 361QD
UT WOS:000260141300011
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
Kukartsev, G
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
Teodorescu, L
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
Schalk, T
Schumm, BA
Seiden, A
Wang, L
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
Kreisel, A
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
Sundermann, JE
Volk, A
Bernard, D
Bonneaud, GR
Latour, E
Thiebaux, C
Verderi, M
Clark, PJ
Gradl, W
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
Marks, J
Schenk, S
Uwer, U
Klose, V
Lacker, HM
Bard, DJ
Dauncey, PD
Nash, JA
Vazquez, WP
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
Denig, AG
Fritsch, M
Schott, G
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
Alwyn, KE
Bailey, DS
Barlow, RJ
Barlow, RJ
Chia, YM
Edgar, CL
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
Koeneke, K
Sciolla, G
Spitznagel, M
Taylor, F
Yamamoto, RK
Zhao, M
Patel, PM
Robertson, SH
Lazzaro, A
Lombardo, V
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
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
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
Biesiada, J
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
Roethel, W
Wilson, FF
Emery, S
Escalier, M
Esteve, L
Gaidot, A
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.
Kukartsev, 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.
Teodorescu, L.
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.
Schalk, T.
Schumm, B. A.
Seiden, A.
Wang, L.
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.
Kreisel, A.
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.
Sundermann, J. E.
Volk, A.
Bernard, D.
Bonneaud, G. R.
Latour, E.
Thiebaux, Ch.
Verderi, M.
Clark, P. J.
Gradl, W.
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.
Marks, J.
Schenk, S.
Uwer, U.
Klose, V.
Lacker, H. M.
Bard, D. J.
Dauncey, P. D.
Nash, J. A.
Vazquez, W. Panduro
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.
Denig, A. G.
Fritsch, M.
Schott, G.
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.
Alwyn, K. E.
Bailey, D. S.
Barlow, R. J.
Barlow, R. J.
Chia, Y. M.
Edgar, C. L.
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.
Koeneke, K.
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.
Eschenburg, V.
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.
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.
Biesiada, 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.
Roethel, W.
Wilson, F. F.
Emery, S.
Escalier, M.
Esteve, L.
Gaidot, A.
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.
TI Observation and Polarization Measurements of B-+/- -> phi K-1(+/-) and
B-+/- -> phi K-2*(+/-)
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DECAYS
AB With the full BABAR data sample of 465 x 10(6) B (B) over bar pairs, we observe the decays B-+/- -> phi K-1(1270)(+/-) and B-+/- -> phi K-2*(1430)(+/-). We measure the branching fractions (6.1 +/- 1.6 +/- 1.1) x 10(-6) and (8.4 +/- 1.8 +/- 1.0) x 10(-6) and the fractions of longitudinal polarization 0.46(-0.13-0.07)(+0.12+0.06) and 0.80(-0.10)(+0.09) +/- 0.03, respectively. We also report on the B-+/- -> phi K-0*(1430)(+/-) decay branching fraction of (7.0 +/- 1.3 +/- 0.9) x 10(-6) and several parameters sensitive to CP violation and interference in the above three decays. Upper limits are placed on the B-+/- decay rates to final states with phi and K-1(1400)(+/-), K*(1410)(+/-), K-2(1770)(+/-), or K-2(1820)(+/-). Understanding the observed polarization pattern requires amplitude contributions from an uncertain source.
C1 [Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.] CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
[Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.] Univ Savoie, 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, Dipartimento 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.; Kukartsev, 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, 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.; Teodorescu, L.] 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.; Schalk, T.; Schumm, B. A.; Seiden, A.; Wang, L.; 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.; Kreisel, A.; Nagel, M.; Nauenberg, U.; Smith, J. G.; Ulmer, K. A.; Wagner, S. R.] Univ Colorado, Boulder, CO 80309 USA.
[Hirschauer, J. F.; 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.; Sundermann, J. E.; Volk, A.] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
[Bernard, D.; Bonneaud, G. R.; Latour, E.; Thiebaux, Ch.; Verderi, M.] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
[Clark, P. J.; Gradl, W.; Playfer, S.; Watson, J. E.] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
[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.; Santroni, A.; Tosi, S.; Roberts, D. A.] 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.
[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.; Vazquez, W. Panduro; 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.
[Denig, A. G.; Fritsch, M.; Schott, G.] Univ Karlsruhe, Inst Expt Kernphys, D-76021 Karlsruhe, Germany.
[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, IN2P3, Lab Accelerateur Lineaire, 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, F-91898 Orsay, France.
[Lange, D. J.; Wright, D. H.] 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.
[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.; Eschenburg, V.; 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 Fis, 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.; Gladney, L.] Univ Denis Diderot Paris7, 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.; Lusiani, A.; Marchiori, G.; Morganti, M.; Neri, N.; Paoloni, E.; Rizzo, G.; Walsh, J. J.] Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy.
[Biesiada, J.; Pegna, D. Lopes; Lu, C.; Olsen, J.; Smith, A. J. S.; Telnov, A. V.] Princeton Univ, Princeton, NJ 08544 USA.
[Morganti, M.; 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.; 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.; Polci, F.; Renga, F.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
[Ebert, M.; Hartmann, T.; Schroeder, H.] Univ Rostock, D-18051 Rostock, Germany.
[Waldi, R.; Adye, T.; Franek, B.; Olaiya, E. O.; Roethel, W.; Wilson, F. F.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Emery, S.; Escalier, M.; Esteve, L.; Gaidot, A.; Ganzhur, S. F.; de Monchenault, G. Hamel; Kozanecki, W.; Vasseur, G.; Yeche, Ch.; Zito, M.] CEA Saclay, DSM Dapnia, 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.; 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.; 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.
[Ritchie, J. L.; Bomben, M.; Bosisio, L.; Cartaro, C.; Della Ricca, G.; Lanceri, L.; Vitale, L.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
[Ritchie, J. L.; 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.; Pierini, M.; Prepost, R.; Vuosalo, C. O.; Wu, S. L.] Univ Wisconsin, Madison, WI 53706 USA.
[Lusiani, A.; Walsh, J. J.] Scuola Normale Super Pisa, I-56127 Pisa, 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; Lusiani, Alberto/A-3329-2016; Morandin,
Mauro/A-3308-2016; Di Lodovico, Francesca/L-9109-2016; Pappagallo,
Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey,
Raymond/E-2830-2016; Rizzo, Giuliana/A-8516-2015; 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; de Sangro, Riccardo/J-2901-2012; Saeed, Mohammad
Alam/J-7455-2012; Della Ricca, Giuseppe/B-6826-2013; dong,
liaoyuan/A-5093-2015;
OI 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; 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;
Pacetti, Simone/0000-0002-6385-3508; Rizzo,
Giuliana/0000-0003-1788-2866; 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; de Sangro,
Riccardo/0000-0002-3808-5455; Saeed, Mohammad Alam/0000-0002-3529-9255;
Della Ricca, Giuseppe/0000-0003-2831-6982; Raven,
Gerhard/0000-0002-2897-5323; Bettarini, Stefano/0000-0001-7742-2998;
Cibinetto, Gianluigi/0000-0002-3491-6231; dong,
liaoyuan/0000-0002-4773-5050; Covarelli, Roberto/0000-0003-1216-5235;
Paoloni, Eugenio/0000-0001-5969-8712; Faccini,
Riccardo/0000-0003-2613-5141
NR 25
TC 22
Z9 22
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 OCT 17
PY 2008
VL 101
IS 16
AR 161801
DI 10.1103/PhysRevLett.101.161801
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 361QD
UT WOS:000260141300008
ER
PT J
AU Chernyak, VY
Sinitsyn, NA
AF Chernyak, V. Y.
Sinitsyn, N. A.
TI Pumping Restriction Theorem for Stochastic Networks
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID OSCILLATING FIELD; KINETICS; MOTORS
AB We formulate an exact result, which we refer to as the pumping restriction theorem (PRT). It imposes strong restrictions on the currents generated by periodic driving in a generic dissipative system with detailed balance, and provides a universal nonperturbative approach to explore the stochastic pump effect in nonadiabatically driven systems.
C1 [Chernyak, V. Y.] Wayne State Univ, Dept Chem, Detroit, MI 48202 USA.
[Chernyak, V. Y.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Sinitsyn, N. A.] Los Alamos Natl Lab, Ctr Nonlinear Studies & Comp, Computat & Stat Sci Div, Los Alamos, NM 87545 USA.
RP Chernyak, VY (reprint author), Wayne State Univ, Dept Chem, 5101 Cass Ave, Detroit, MI 48202 USA.
RI Sinitsyn, nikolai/B-5617-2009; Chernyak, Vladimir/F-5842-2016
OI Chernyak, Vladimir/0000-0003-4389-4238
FU National Science Foundation [CHE-0808910]; DOE [DE-AC52-06NA25396]
FX We thank the authors of Ref. [9] for sharing their results prior to
publication, and also B. Munsky and I. Nemenman for useful discussions.
This material is based upon work supported by the National Science
Foundation under CHE-0808910 and in part by DOE under Contract No.
DE-AC52-06NA25396.
NR 19
TC 31
Z9 31
U1 0
U2 3
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 OCT 17
PY 2008
VL 101
IS 16
AR 160601
DI 10.1103/PhysRevLett.101.160601
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 361QD
UT WOS:000260141300005
PM 18999654
ER
PT J
AU Dalvit, DAR
Lamoreaux, SK
AF Dalvit, Diego A. R.
Lamoreaux, Steve K.
TI Contribution of Drifting Carriers to the Casimir-Lifshitz and
Casimir-Polder Interactions With Semiconductor Materials
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID FORCE
AB We develop a theory for Casimir-Lifshitz and Casimir-Polder interactions with semiconductor or insulator surfaces that takes into account charge drift in the bulk material through use of the classical Boltzmann equation. We derive frequency-dependent dispersion relations that give the usual Lifshitz results for dielectrics as a limiting case and, in the quasistatic limit, coincide with those recently computed to account for Debye screening in the thermal Lifshitz force with conducting surfaces with small density of carriers.
C1 [Dalvit, Diego A. R.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Lamoreaux, Steve K.] Yale Univ, Dept Phys, New Haven, CT 06520 USA.
RP Dalvit, DAR (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
NR 17
TC 36
Z9 36
U1 0
U2 4
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 OCT 17
PY 2008
VL 101
IS 16
AR 163203
DI 10.1103/PhysRevLett.101.163203
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 361QD
UT WOS:000260141300017
PM 18999666
ER
PT J
AU Hastings, MB
AF Hastings, M. B.
TI Inference from Matrix Products: A Heuristic Spin-Glass Algorithm
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID FRUSTRATION MODEL; GROUND-STATES
AB We present an algorithm for finding ground states of two-dimensional spin-glass systems based on ideas from matrix product states in quantum information theory. The algorithm works directly at zero temperature and defines an approximation to the energy whose accuracy depends on a parameter k. We test the algorithm against exact methods on random field and random bond Ising models, and we find that accurate results require a k which scales roughly polynomially with the system size. The algorithm also performs well when tested on small systems with arbitrary interactions, where no fast, exact algorithms exist. The time required is significantly less than Monte Carlo schemes.
C1 [Hastings, M. B.] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
[Hastings, M. B.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Hastings, M. B.] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA.
RP Hastings, MB (reprint author), Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
FU U.S. DOE [DE-AC52-06NA25396]
FX This work was supported by U.S. DOE Contract No. DE-AC52-06NA25396.
NR 23
TC 3
Z9 3
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 OCT 17
PY 2008
VL 101
IS 16
AR 167206
DI 10.1103/PhysRevLett.101.167206
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 361QD
UT WOS:000260141300062
PM 18999711
ER
PT J
AU Larese, JZ
Arnold, T
Frazier, L
Hinde, RJ
Ramirez-Cuesta, AJ
AF Larese, J. Z.
Arnold, T.
Frazier, L.
Hinde, R. J.
Ramirez-Cuesta, A. J.
TI Direct Observation of H(2) Binding to a Metal Oxide Surface
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SEPARATION; ADSORPTION; HYDROGEN; MGO(100); SUBSTRATE; CHARGE; ARGON;
FILMS
AB Inelastic neutron scattering is used to probe the dynamical response of H(2) films adsorbed on MgO(100) as a function of film thickness. Concomitant diffraction measurements and a reduced-dimensionality quantum dynamical model provide insight into the molecule-surface interaction potential. At monolayer thickness, the rotational motion is strongly influenced by the surface, so that the molecules behave like quasiplanar rotors. These findings have a direct impact on understanding how molecular hydrogen binds to the surface of materials used in catalytic and storage applications.
C1 [Larese, J. Z.; Arnold, T.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Larese, J. Z.; Frazier, L.; Hinde, R. J.] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
[Ramirez-Cuesta, A. J.] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
RP Larese, JZ (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM jzl@utk.edu; rhinde@utk.edu
RI D20, Diffractometer/O-3123-2013; Ramirez-Cuesta, Timmy/A-4296-2010;
OI D20, Diffractometer/0000-0002-1572-1367; Ramirez-Cuesta,
Timmy/0000-0003-1231-0068; Arnold, Thomas/0000-0001-8295-3822; Hinde,
Robert/0000-0003-3499-9222
FU Division of Materials Science; Office of Basic Energy Science; U. S. DOE
[DE-AC05-00OR22725]; NSF [DMR-0412231]
FX We thank H. Glyde, J. M. Hastings, S. Parker, S. Rols, A. Migone, B.
Sumpter, and O. Vilches for useful discussions and R. Cook, P. Yaron,
and the ISIS support team for assistance. This work was funded by the
Division of Materials Science, Office of Basic Energy Science, U. S.
DOE, under Contract No. DE-AC05-00OR22725 with ORNL (UT-Battelle, LLC)
and by NSF under Grant No. DMR-0412231.
NR 24
TC 21
Z9 22
U1 1
U2 12
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 OCT 17
PY 2008
VL 101
IS 16
AR 165302
DI 10.1103/PhysRevLett.101.165302
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 361QD
UT WOS:000260141300032
PM 18999681
ER
PT J
AU Lipp, MJ
Jackson, D
Cynn, H
Aracne, C
Evans, WJ
McMahan, AK
AF Lipp, M. J.
Jackson, D.
Cynn, H.
Aracne, C.
Evans, W. J.
McMahan, A. K.
TI Thermal Signatures of the Kondo Volume Collapse in Cerium
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ALPHA-GAMMA-TRANSITION; PHASE-TRANSITION; HIGH-PRESSURE; CE; EQUATION;
LATTICE; POINT; STATE; METAL
AB X-ray diffraction measurements of cerium in the vicinity of the isostructural gamma-alpha transition have been performed with high precision and accuracy from room temperature to almost 800 K. The disputed location of the critical point has been found to occur at 1.5 +/- 0.1 GPa and 480 +/- 10 K. The data are well fit by the Kondo volume collapse model plus a quasiharmonic representation of the phonons. The resultant free energy is validated against data for the thermodynamic Gruneisen parameter and, beyond the dominant spin-fluctuation contribution, indicates a dramatic change in the lattice Gruneisen parameter across the transition.
C1 [Lipp, M. J.; Jackson, D.; Cynn, H.; Aracne, C.; Evans, W. J.; McMahan, A. K.] Lawrence Livermore Natl Lab, H Div, Livermore, CA 94550 USA.
RP Lipp, MJ (reprint author), Lawrence Livermore Natl Lab, H Div, Livermore, CA 94550 USA.
FU U. S. Department of Energy [W-7405-Eng-48, DE-AC52-07NA27344]; DOE-BES;
DOE-NNSA
FX This work was performed under the auspices of the U. S. Department of
Energy by Lawrence Livermore National Laboratory in part under Contract
W-7405-Eng-48 and in part under Contract DE-AC52-07NA27344. The x-ray
work was performed at beam line 16BMB and 16BMD of the HPCAT at the APS,
supported by DOE-BES and DOE-NNSA (CDAC, LLNL, UNLV). We are grateful
for experimental help from H. P. Liermann, W. Yang, O. Shebanova
(HPCAT), G. W. Lee, and conversations with M. Manley, J. Moriarty, and
L.
NR 33
TC 57
Z9 58
U1 3
U2 19
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 OCT 17
PY 2008
VL 101
IS 16
AR 165703
DI 10.1103/PhysRevLett.101.165703
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 361QD
UT WOS:000260141300038
PM 18999687
ER
PT J
AU McQueen, TM
Stephens, PW
Huang, Q
Klimczuk, T
Ronning, F
Cava, RJ
AF McQueen, T. M.
Stephens, P. W.
Huang, Q.
Klimczuk, T.
Ronning, F.
Cava, R. J.
TI Successive Orbital Ordering Transitions in NaVO(2)
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SUPERCONDUCTIVITY; NATIO2; LIVO2
AB Physical property measurements on samples of triangular-lattice NaVO(2) reveal two successive orbital ordering transitions. At 300 K, the structure is rhombohedral. At 98 K, the system undergoes a second-order transition to a monoclinic phase in which the in-plane V-V distances separate into four short and two long bonds, corresponding to orbital ordering of one electron per V(3+). Below 93 K, there is a first-order transition to a second monoclinic phase with four long and two short V-V bonds, consistent with orbital ordering of two electrons per V(3+). Long range magnetic ordering of 0.98(2)mu(B) per V(3+) (3d(2)) sets in at the 93 K structural transition. The orbital ordering relieves the geometric frustration and leads to a magnetically ordered ground state.
C1 [McQueen, T. M.; Cava, R. J.] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA.
[Stephens, P. W.] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
[Huang, Q.] NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[Klimczuk, T.; Ronning, F.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Ronning, F.] Gdansk Univ Technol, Fac Appl Phys & Math, PL-80952 Gdansk, Poland.
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; Ronning, Filip/0000-0002-2679-7957
FU National Science Foundation; NSF DMF [NSF-DMR-0703095]; U. S. Department
of Energy; Office of Science; Office of Basic Energy Sciences
[DE-AC02-98CH10886]
FX M. M. gratefully acknowledges support of the National Science Foundation
Graduate Research Fellowship Program. This work was done under NSF DMF
Grant No. NSF-DMR-0703095. Use of the National Synchrotron Light Source,
Brookhaven National Laboratory, was supported by the U. S. Department of
Energy, Office of Science, Office of Basic Energy Sciences, under
Contract No. DE-AC02-98CH10886.
NR 14
TC 28
Z9 29
U1 7
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 OCT 17
PY 2008
VL 101
IS 16
AR 166402
DI 10.1103/PhysRevLett.101.166402
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 361QD
UT WOS:000260141300041
PM 18999690
ER
PT J
AU Mier, JA
Sanchez, R
Garcia, L
Carreras, BA
Newman, DE
AF Mier, J. A.
Sanchez, R.
Garcia, L.
Carreras, B. A.
Newman, D. E.
TI Characterization of Nondiffusive Transport in Plasma Turbulence via a
Novel Lagrangian Method
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SELF-ORGANIZED CRITICALITY; ANOMALOUS TRANSPORT; FRACTIONAL DYNAMICS;
DIFFUSION; PARADIGM; CONFINEMENT; DEVICES; MODEL
AB A novel method to probe and characterize the nature of the transport of passive scalars carried out by a turbulent flow is introduced. It requires the determination of two exponents which encapsulate the statistical and correlation properties of the component of interest of the Lagrangian velocities of the flow. Numerical simulations of a magnetically confined, near- critical turbulent plasma, known to exhibit superdiffusive radial transport, are used to illustrate the method. It is shown that the method can easily detect the change in the dynamics of the radial transport that takes place after adding to the simulations a (subdominant) diffusive channel of tunable strength.
C1 [Mier, J. A.; Garcia, L.] Univ Carlos III Madrid, Dept Fis, Madrid 28911, Spain.
[Sanchez, R.] Oak Ridge Natl Lab, Div Fus Energy, Oak Ridge, TN 37831 USA.
[Carreras, B. A.] BACV Solut Inc, Oak Ridge, TN 37830 USA.
[Newman, D. E.] Univ Alaska, Dept Phys, Fairbanks, AK 99775 USA.
RP Mier, JA (reprint author), Univ Carlos III Madrid, Dept Fis, Madrid 28911, Spain.
EM jmier@fis.uc3m.es
RI Garcia, Luis/A-5344-2015
OI Garcia, Luis/0000-0002-0492-7466
FU Spanish DGES [ENE2006-15244-C03-01/FTN]; DOE Office of Science
[DE-FG02-04ER54741]; U. S. DOE [DE-AC05-00OR22725]
FX Research supported by Spanish DGES Grant No. ENE2006-15244-C03-01/FTN
and DOE Office of Science Grant No. DE-FG02-04ER54741 at University of
Alaska. ORNL researchers sponsored by U. S. DOE under Contract No.
DE-AC05-00OR22725.
NR 24
TC 20
Z9 20
U1 0
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 OCT 17
PY 2008
VL 101
IS 16
AR 165001
DI 10.1103/PhysRevLett.101.165001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 361QD
UT WOS:000260141300028
PM 18999677
ER
PT J
AU Zhao, J
Yao, DX
Li, SL
Hong, T
Chen, Y
Chang, S
Ratcliff, W
Lynn, JW
Mook, HA
Chen, GF
Luo, JL
Wang, NL
Carlson, EW
Hu, JP
Dai, PC
AF Zhao, Jun
Yao, Dao-Xin
Li, Shiliang
Hong, Tao
Chen, Y.
Chang, S.
Ratcliff, W., II
Lynn, J. W.
Mook, H. A.
Chen, G. F.
Luo, J. L.
Wang, N. L.
Carlson, E. W.
Hu, Jiangping
Dai, Pengcheng
TI Low Energy Spin Waves and Magnetic Interactions in SrFe(2)As(2)
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SUPERCONDUCTIVITY
AB We report inelastic neutron scattering studies of magnetic excitations in antiferromagnetically ordered SrFe(2)As(2) (T(N)=200-220 K), the parent compound of the FeAs-based superconductors. At low temperatures (T=7 K), the magnetic spectrum S(Q,h omega) consists of a Bragg peak at the elastic position (h omega=0 meV), a spin gap (Delta <= 6.5 meV), and sharp spin-wave excitations at higher energies. Based on the observed dispersion relation, we estimate the effective magnetic exchange coupling using a Heisenberg model. On warming across T(N), the low-temperature spin gap rapidly closes, with weak critical scattering and spin-spin correlations in the paramagnetic state. The antiferromagnetic order in SrFe(2)As(2) is therefore consistent with a first order phase transition, similar to the structural lattice distortion.
C1 [Zhao, Jun; Li, Shiliang; Dai, Pengcheng] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Yao, Dao-Xin; Carlson, E. W.; Hu, Jiangping] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA.
[Hong, Tao; Mook, H. A.; Dai, Pengcheng] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
[Chen, Y.; Chang, S.; Ratcliff, W., II; Lynn, J. W.] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[Chen, G. F.; Luo, J. L.; Wang, N. L.] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
RP Zhao, J (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
EM daip@ornl.gov
RI Li, Shiliang/B-9379-2009; Hong, Tao/F-8166-2010; Zhao, Jun/A-2492-2010;
Dai, Pengcheng /C-9171-2012; Hu, Jiangping/A-9154-2010; hu, jiangping
/C-3320-2014
OI Hong, Tao/0000-0002-0161-8588; Zhao, Jun/0000-0002-0421-8934; Dai,
Pengcheng /0000-0002-6088-3170; Hu, Jiangping/0000-0003-4480-1734;
FU U.S. NSF [DMR-0756568, PHY-0603759, DMR-0804748]; U.S. DOE, BES
[DE-FG02-05ER46202]; Division of Scientific User Facilities; Research
Corporation; NSF of China; CAS ITSNEM; Ministry of Science and
Technology of China
FX We thank R. Fishman for discussions on Cr. This work is supported by the
U.S. NSF No. DMR-0756568, No. PHY-0603759, No. DMR-0804748, by the U.S.
DOE, BES, through DOE No. DE-FG02-05ER46202, Division of Scientific User
Facilities, and Research Corporation. The work at the IOP, CAS, is
supported by the NSF of China, the CAS ITSNEM, and the Ministry of
Science and Technology of China.
NR 33
TC 149
Z9 152
U1 1
U2 16
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 OCT 17
PY 2008
VL 101
IS 16
AR 167203
DI 10.1103/PhysRevLett.101.167203
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 361QD
UT WOS:000260141300059
PM 18999708
ER
PT J
AU Gorostiza, P
Isacoff, EY
AF Gorostiza, Pau
Isacoff, Ehud Y.
TI Optical switches for remote and noninvasive control of cell signaling
SO SCIENCE
LA English
DT Review
ID ION CHANNELS; ACETYLCHOLINE RECEPTOR; GLUTAMATE-RECEPTOR; POTASSIUM
CHANNEL; K+ CHANNEL; NEURONS; CHANNELRHODOPSIN-2; MANIPULATION;
ACTIVATION; EXCITATION
C1 [Isacoff, Ehud Y.] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
[Isacoff, Ehud Y.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Biosci, Berkeley, CA 94720 USA.
[Isacoff, Ehud Y.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Phys Biosci, Berkeley, CA 94720 USA.
[Gorostiza, Pau] Inst Catalana Recerca & Estud Avancats, Barcelona 08028, Spain.
[Gorostiza, Pau] Inst Bioengn Catalunya, Barcelona 08028, Spain.
RP Isacoff, EY (reprint author), Univ Calif Berkeley, Dept Mol & Cell Biol, 271 Life Sci Addit, Berkeley, CA 94720 USA.
EM ehud@berkeley.edu
RI Gorostiza, Pau/Q-2544-2015
OI Gorostiza, Pau/0000-0002-7268-5577
FU Human Frontier Science Program Organization; European Research Council;
NIH Nanomedicine Development Center for the Optical Control of
Biological Function [5PN2EY018241]
FX P.G. is supported by the Human Frontier Science Program Organization
through a Career Development Award and by the European Research Council
through a Starting Grant. This work was supported by the NIH
Nanomedicine Development Center for the Optical Control of Biological
Function (grant 5PN2EY018241).
NR 38
TC 159
Z9 162
U1 4
U2 68
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 OCT 17
PY 2008
VL 322
IS 5900
BP 395
EP 399
DI 10.1126/science.1166022
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 360YK
UT WOS:000260094500034
PM 18927384
ER
PT J
AU Mezger, M
Schroder, H
Reichert, H
Schramm, S
Okasinski, JS
Schoder, S
Honkimaki, V
Deutsch, M
Ocko, BM
Ralston, J
Rohwerder, M
Stratmann, M
Dosch, H
AF Mezger, Markus
Schroder, Heiko
Reichert, Harald
Schramm, Sebastian
Okasinski, John S.
Schoder, Sebastian
Honkimaki, Veijo
Deutsch, Moshe
Ocko, Benjamin M.
Ralston, John
Rohwerder, Michael
Stratmann, Martin
Dosch, Helmut
TI Molecular layering of fluorinated ionic liquids at a charged sapphire
(0001) surface
SO SCIENCE
LA English
DT Article
ID X-RAY REFLECTIVITY; SOLAR-CELLS; SOLVENTS; METAL; SYSTEMS; FILMS
AB Room-temperature ionic liquids (RTILs) are promising candidates for a broad range of "green" applications, for which their interaction with solid surfaces plays a crucial role. In this high-energy x-ray reflectivity study, the temperature-dependent structures of three ionic liquids with the tris(pentafluoroethyl) trifluorophosphate anion in contact with a charged sapphire substrate were investigated with submolecular resolution. All three RTILs show strong interfacial layering, starting with a cation layer at the substrate and decaying exponentially into the bulk liquid. The observed decay length and layering period point to an interfacial ordering mechanism, akin to the charge inversion effect, which is suggested to originate from strong correlations between the unscreened ions. The observed layering is expected to be a generic feature of RTILs at charged interfaces.
C1 [Mezger, Markus; Schroder, Heiko; Reichert, Harald; Schramm, Sebastian; Okasinski, John S.; Schoder, Sebastian; Dosch, Helmut] Max Planck Inst Met Res, D-70569 Stuttgart, Germany.
[Schoder, Sebastian; Honkimaki, Veijo] European Synchrotron Radiat Facil, F-38043 Grenoble, France.
[Deutsch, Moshe] Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel.
[Deutsch, Moshe] Bar Ilan Univ, Inst Nanotechnol & Adv Mat, IL-52900 Ramat Gan, Israel.
[Ocko, Benjamin M.] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
[Ralston, John] Univ S Australia, Ian Wark Res Inst, Mawson Lakes, SA 5095, Australia.
[Rohwerder, Michael; Stratmann, Martin] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany.
[Dosch, Helmut] Univ Stuttgart, Inst Theoret & Angew Phys, D-70550 Stuttgart, Germany.
RP Reichert, H (reprint author), Max Planck Inst Met Res, D-70569 Stuttgart, Germany.
EM reichert@mf.mpg.de
RI Ralston, John/B-9248-2009; Barsoum, Michel/I-2842-2012; Mezger,
Markus/D-6897-2014
OI Ralston, John/0000-0002-8271-3041; Barsoum, Michel/0000-0001-7800-3517;
Mezger, Markus/0000-0001-9049-6983
FU German-Israeli Foundation for Scientific Research and Development [I
779-42.10/2003]; U.S.-Israel Binational Science Foundation (Jerusalem);
Division of Materials Science of the U.S. Department of Energy
[DE-AC02-98CH10886]; Australian Research Council Special Research Centre
Scheme
FX This work was supported by the German-Israeli Foundation for Scientific
Research and Development (no. I 779-42.10/2003), the U.S.-Israel
Binational Science Foundation (Jerusalem), the Division of Materials
Science of the U.S. Department of Energy under contract no.
DE-AC02-98CH10886, and the Australian Research Council Special Research
Centre Scheme.
NR 30
TC 332
Z9 333
U1 15
U2 226
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 OCT 17
PY 2008
VL 322
IS 5900
BP 424
EP 428
DI 10.1126/science.1164502
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 360YK
UT WOS:000260094500042
PM 18927390
ER
PT J
AU Aliyari, R
Wu, QF
Li, HW
Wang, XH
Li, F
Green, LD
Han, CS
Li, WX
Ding, SW
AF Aliyari, Roghiyh
Wu, Qingfa
Li, Hong-Wei
Wang, Xiao-Hong
Li, Feng
Green, Lance D.
Han, Cliff S.
Li, Wan-Xiang
Ding, Shou-Wei
TI Mechanism of Induction and Suppression of Antiviral Immunity Directed by
Virus-Derived Small RNAs in Drosophila
SO CELL HOST & MICROBE
LA English
DT Article
ID DOUBLE-STRANDED-RNA; FLOCK-HOUSE-VIRUS; SMALL INTERFERING RNAS;
TOBACCO-MOSAIC-VIRUS; DICER-LIKE PROTEINS; SOMATIC-CELLS; ANIMAL VIRUS;
HOST-DEFENSE; MICRORNAS; REPLICATION
AB The small RNA-directed viral immunity pathway in plants and invertebrates begins with the production by Dicer nuclease of virus-derived siRNAs (viRNAs), which guide specific antiviral silencing by Argonaute protein in an RNA-induced silencing complex (RISC). Molecular identity of the viral RNA precursor of viRNAs remains a matter of debate. Using Flock house virus (FHV) infection of Drosophila as a model, we show that replication of FHV positive-strand RNA genome produces an similar to 400 bp dsRNA from its 5'-terminus that serves as the major Dicer-2 substrate. ViRNAs; thus generated are loaded in Argonaute-2 and methylated at their 3' ends. Notably, FHV-encoded RNAi suppressor 132 protein interacts with both viral dsRNA and RNA replicase and inhibits production of the 5'-terminal viRNAs. Our findings, therefore, provide a model in which small RNA-directed viral immunity is induced during the initiation of viral progeny (+)RNA synthesis and suppressed by B2 inside the viral RNA replication complex.
C1 [Aliyari, Roghiyh; Wu, Qingfa; Li, Hong-Wei; Wang, Xiao-Hong; Li, Feng; Li, Wan-Xiang; Ding, Shou-Wei] Univ Calif Riverside, Inst Integrat Genome Biol, Dept Plant Pathol & Microbiol, Riverside, CA 92521 USA.
[Green, Lance D.; Han, Cliff S.] Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
RP Ding, SW (reprint author), Univ Calif Riverside, Inst Integrat Genome Biol, Dept Plant Pathol & Microbiol, Riverside, CA 92521 USA.
EM shou-wei.ding@ucr.edu
FU NIH [AI052447]; National Research Initiative of the USDA Cooperative
State Research, Education, and Extension Service [2007-35319-18325]
FX We wish to thank Paul Ahlquist for the antibody to protein A, Mikiko
Siomi for the antibodies to AGO1 and AGO2, and A.L.N. Rao for a crude
FHV Delta B2 virion preparation used in the early studies. This work was
supported by NIH grant AI052447 (to S.D.) and the National Research
Initiative of the USDA Cooperative State Research, Education, and
Extension Service grant 2007-35319-18325 (to S.D.).
NR 56
TC 137
Z9 142
U1 2
U2 22
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 1931-3128
J9 CELL HOST MICROBE
JI Cell Host Microbe
PD OCT 16
PY 2008
VL 4
IS 4
BP 387
EP 397
DI 10.1016/j.chom.2008.09.001
PG 11
WC Microbiology; Parasitology; Virology
SC Microbiology; Parasitology; Virology
GA 363PF
UT WOS:000260278500012
PM 18854242
ER
PT J
AU Zhou, D
Metzler, RA
Tyliszczak, T
Guo, JH
Abrecht, M
Coppersmith, SN
Gilbert, PUPA
AF Zhou, Dong
Metzler, Rebecca A.
Tyliszczak, Tolek
Guo, Jinghua
Abrecht, Mike
Coppersmith, Susan N.
Gilbert, P. U. P. A.
TI Assignment of Polarization-Dependent Peaks in Carbon K-Edge Spectra from
Biogenic and Geologic Aragonite
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID TRANSMISSION X-RAY; NACRE; SPECTROSCOPY; CALCITE; SURFACE; MATRIX
AB Many biominerals, including mollusk and echinoderm shells, avian eggshells, modem and fossil bacterial sediments, planktonic coccolithophores, and foraminifera, contain carbonates in the form of biogenic aragonite or calcite. Here we analyze biogenic and geologic aragonite using different kinds of surface- and bulk-sensitive X-ray absorption near-edge structure (XANES) spectroscopy at the carbon K-edge, as well as highresolution scanning transmission X-ray microscopy (STXM). Besides the well-known main, pi* and sigma* carbonate peaks, we observed and fully characterized four minor peaks, at energies between the main pi* and sigma* peaks. As expected, the main peaks are similar in geologic and biogenic aragonite, while the minor peaks differ in relative intensity. In this and previous work, the minor peaks appear to be the ones most affected in biomineralization processes, hence the interest in characterizing them. Peak assignment was achieved by correlation of polarization-dependent behavior of the minor peaks with that of the main pi* and sigma* peaks. The present characterization provides the background for future studies of aragonitic biominerals.
C1 [Zhou, Dong; Metzler, Rebecca A.; Coppersmith, Susan N.; Gilbert, P. U. P. A.] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
[Tyliszczak, Tolek; Guo, Jinghua] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
[Abrecht, Mike] Ctr Synchrotron Radiat, Stoughton, WI 53589 USA.
RP Gilbert, PUPA (reprint author), Univ Wisconsin, Dept Phys, 1150 Univ Ave, Madison, WI 53706 USA.
EM pupa@physics.wisc.edu
RI Zhou, Dong/A-2675-2011; Gilbert, Pupa/A-6299-2010
OI Gilbert, Pupa/0000-0002-0139-2099
FU NSF [PHY-0523905, CHEDMR0613972, DMR-0537588]; ALS; DoE
[DE-AC02-05CH11231]; UW-SRC
FX We thank Paul Voyles and Ye Zhu for their help with tripod polishing,
and Matthew Marcus for the geologic aragonite samples. We are grateful
to Adam Hitchcock for his valuable suggestions on peak assignment. This
work was supported by NSF awards PHY-0523905 and CHE&DMR0613972, DoE
award DE-FG02-07ER15899 and UW Vilas and Hamel Awards to PUPAG. The
experiments were performed at the ALS, supported by DoE under contract
DE-AC02-05CH11231, and at the UW-SRC, supported by NSF award
DMR-0537588.
NR 29
TC 16
Z9 16
U1 0
U2 12
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 OCT 16
PY 2008
VL 112
IS 41
BP 13128
EP 13135
DI 10.1021/jp803176z
PG 8
WC Chemistry, Physical
SC Chemistry
GA 358UO
UT WOS:000259943200033
PM 18811192
ER
PT J
AU Han, HX
Frei, H
AF Han, Hongxian
Frei, Heinz
TI In Situ Spectroscopy of Water Oxidation at Ir Oxide Nanocluster Driven
by Visible TiOCr Charge-transfer Chromophore in Mesoporous Silica
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID OXYGEN EVOLUTION; LIGHT; CATALYSTS; CHEMISTRY; CENTERS; SIEVE; REDOX
AB An all-inorganic photocatalytic unit consisting of a binuclear TiOCr charge-transfer chromophore coupled to an Ir oxide nanocluster has been assembled on the pore surface of mesoporous silica AlMCM-41. When exciting the Ti(IV)OCr(III) --> Ti(III)OCr(IV) metal-to-metal charge-transfer chromophore of an aqueous suspension of IrxOy-TiCr-AlMCM-41 powder with visible light, oxygen evolution with a quantum efficiency of at least 13% was detected by Clark electrode measurements. In situ Fourier transform Raman and X-band electron paramagnetic resonance spectroscopy revealed the formation of superoxide species. Use of (H2O)-O-18 confirmed that the superoxide species originates from oxidation of water. Photolysis in the absence of persulfate acceptor led to accumulation of Ti(III) instead. The results indicate efficient photocatalytic oxidation of water at Ir oxide nanoclusters followed by trapping of the evolving O-2 by transient Ti(III) centers to yield superoxide. Given the flexibility of the synthetic method for selecting donor metals with appropriate redox potential, photocatalytic units consisting of a binuclear charge-transfer chromophore coupled to a water oxidation catalyst shown here constitute a step toward thermodynamically efficient visible-light water oxidation units.
C1 [Han, Hongxian; Frei, Heinz] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Frei, H (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
EM hmfrei@lbl.gov
RI Han, Hongxian/Q-6054-2016
OI Han, Hongxian/0000-0002-2522-1817
FU US 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, Geological and Biosciences
of the US Department of Energy under Contract No. DE-AC02-05CH11231. The
authors thank Drs. Vittal Yachandra and Yulia Pushkar for access to
their EPR laboratory and for help with the experiments.
NR 21
TC 45
Z9 45
U1 4
U2 29
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 OCT 16
PY 2008
VL 112
IS 41
BP 16156
EP 16159
DI 10.1021/jp803994d
PG 4
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 358UP
UT WOS:000259943300036
ER
PT J
AU Murdock, Z
Nandi, S
Tavartkiladze, Z
AF Murdock, Zeke
Nandi, S.
Tavartkiladze, Zurab
TI Perturbativity and a fourth generation in the MSSM
SO PHYSICS LETTERS B
LA English
DT Article
ID STANDARD MODEL FAMILIES; HIGGS-BOSON; UNIFICATION; MASS; TOP
AB We study an extension of the MSSM with a fourth generation of chiral matter. With this extension no value of tan beta allows the theory to stay perturbative up to the GUT scale. We suggest one model with extra vector-like states at the TeV scale that allows perturbativity all the way up to the GUT scale. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Murdock, Zeke; Nandi, S.; Tavartkiladze, Zurab] Oklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA.
[Murdock, Zeke; Nandi, S.; Tavartkiladze, Zurab] Oklahoma State Univ, Oklahoma Ctr High Energy Phys, Stillwater, OK 74078 USA.
[Murdock, Zeke; Nandi, S.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Tavartkiladze, Z (reprint author), Oklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA.
EM zekemurdock@gmail.com; s.nandi@okstate.edu;
zurab.tavartkiladze@okstate.edu
FU DOE [DE-FG02-04ER41306, DE-FG02-ER46140]; GNSF [07_462_4270]
FX We are grateful to K.S. Babu for useful discussions and comments. We
also thank G. Kribs for his useful comments on the previous version of
this Letter. S.N. and Z.M. would like to thank the Theoretical Physics
Department of Fermilab for warm hospitality and support during the
completion of this work. The work is supported in part by DOE grants
DE-FG02-04ER41306 and DE-FG02-ER46140. Z.T. is also partially supported
by GNSF grant 07_462_4270.
NR 14
TC 28
Z9 28
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD OCT 16
PY 2008
VL 668
IS 4
BP 303
EP 307
DI 10.1016/j.physletb.2008.08.058
PG 5
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 366KS
UT WOS:000260480300010
ER
PT J
AU Shen, YF
Tolic, N
Hixson, KK
Purvine, SO
Anderson, GA
Smith, RD
AF Shen, Yufeng
Tolic, Nikola
Hixson, Kim K.
Purvine, Samuel O.
Anderson, Gordon A.
Smith, Richard D.
TI De novo sequencing of unique sequence tags for discovery of
post-translational modifications of proteins
SO ANALYTICAL CHEMISTRY
LA English
DT Article
ID TANDEM MASS-SPECTROMETRY; DATABASE SEARCH; IDENTIFICATION; PROTEOMICS;
HYBRID
AB De novo sequencing is a spectrum analysis approach for mass spectrometry data to discover post-translational modifications in proteins; however, such an approach is still in its infancy and is still not widely applied to proteomic practices due to its limited reliability. In this work, we describe a de novo sequencing approach for the discovery of protein modifications based on identification of the proteome UStags (Shen, Y.; Tolic, N.; Hixson, K. K.; Purvine, S. O.; Pasa-Tolic, L.; Qian, W. J.; Adkins, J. N.; Moore, R. J.; Smith, R. D. Anal. Chem. 2008, 80, 1871-1882). The de novo information was obtained from Fourier-transform tandem mass spectrometry data for peptides and polypeptides from a yeast lysate, and the de novo sequences obtained were selected based on filter levels designed to provide a limited yet high quality subset of UStags. The DNA-predicted database protein sequences were then compared to the UStags, and the differences observed across or in the UStags (i.e., the UStags' prefix and suffix sequences and the UStags themselves) were used to infer possible sequence modifications. With this de novo-UStag approach, we uncovered some unexpected variances within several yeast protein sequences due to amino acid mutations and/or multiple modifications to the predicted protein sequences. To determine false discovery rates, two random (false) databases were independently used for sequence matching, and similar to 3% false discovery rates were estimated for the de novo-UStag approach. The factors affecting the reliability (e.g., existence of de novo sequencing noise residues and redundant sequences) and the sensitivity of the approach were investigated and described. The combined de novo-UStag approach complements the UStag method previously reported by enabling the discovery of new protein modifications.
C1 [Shen, Yufeng; Anderson, Gordon A.; Smith, Richard D.] Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA.
[Tolic, Nikola; Hixson, Kim K.; Purvine, Samuel O.; Smith, Richard D.] Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA.
RP Shen, YF (reprint author), Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA.
EM Yufeng.shen@pnl.gov; rds@pnl.gov
RI Smith, Richard/J-3664-2012
OI Smith, Richard/0000-0002-2381-2349
FU The William R. Wiley Environmental Molecular Sciences Laboratory (EMSL);
Intramural Research and Capability Development Program [22142]; U.S.
Department of Energy (DOE) Office of Biological and Environmental
Research; NIH National Center for Research Resources [RR18522]; DOE
[DEAC05-76RL0-1830]
FX This research was partially supported by The William R. Wiley
Environmental Molecular Sciences Laboratory (EMSL) Intramural Research
and Capability Development Program (Grant 22142), the U.S. Department of
Energy (DOE) Office of Biological and Environmental Research, and the
NIH National Center for Research Resources (Grant RR18522). Work was
performed in the EMSL, a DOE national scientific user facility located
on the campus of Pacific Northwest National Laboratory (PNNL) in
Richland, Washington. PNNL is a multiprogram national laboratory
operated by Battelle Memorial Institute for the DOE under Contract
DEAC05-76RL0-1830.
NR 13
TC 25
Z9 25
U1 0
U2 6
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 OCT 15
PY 2008
VL 80
IS 20
BP 7742
EP 7754
DI 10.1021/ac801123p
PG 13
WC Chemistry, Analytical
SC Chemistry
GA 359LI
UT WOS:000259987800013
PM 18783246
ER
PT J
AU Shuai, JW
Pearson, JE
Parker, I
AF Shuai, Jianwei
Pearson, John E.
Parker, Ian
TI Modeling Ca2+ feedback on a single inositol 1,4,5-trisphosphate receptor
and its modulation by Ca2+ buffers
SO BIOPHYSICAL JOURNAL
LA English
DT Article
ID XENOPUS-OOCYTES; TRISPHOSPHATE RECEPTOR; IP3 RECEPTORS; CALCIUM PUFFS;
ELEMENTARY EVENTS; RELEASE CHANNELS; CHROMAFFIN CELLS; GATING KINETICS;
GATED CHANNELS; DYNAMICS
AB The inositol 1,4,5-trisphosphate receptor/channel (IP3R) is a major regulator of intracellular Ca2+ signaling, and liberates Ca2+ ions from the endoplasmic reticulum in response to binding at cytosolic sites for both IP3 and Ca2+. Although the steady-state gating properties of the IP3R have been extensively studied and modeled under conditions of fixed [IP3] and [Ca2+], little is known about how Ca2+ flux through a channel may modulate the gating of that same channel by feedback onto activating and inhibitory Ca2+ binding sites. We thus simulated the dynamics of Ca2+ self-feedback on monomeric and tetrameric IP3R models. A major conclusion is that self-activation depends crucially on stationary cytosolic Ca2+ buffers that slow the collapse of the local [Ca2+] microdomain after closure. This promotes burst-like reopenings by the rebinding of Ca2+ to the activating site; whereas inhibitory actions are substantially independent of stationary buffers but are strongly dependent on the location of the inhibitory Ca2+ binding site on the IP3R in relation to the channel pore.
C1 [Shuai, Jianwei] Xiamen Univ, Dept Phys, Xiamen 361005, Fujian, Peoples R China.
[Shuai, Jianwei; Parker, Ian] Univ Calif Irvine, Dept Neurobiol & Behav, Irvine, CA USA.
[Pearson, John E.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Parker, Ian] Univ Calif Irvine, Dept Physiol & Biophys, Irvine, CA 92717 USA.
RP Shuai, JW (reprint author), Xiamen Univ, Dept Phys, Xiamen 361005, Fujian, Peoples R China.
EM jianweishuai@xmu.edu.cn
RI Shuai, Jianwei/G-3371-2010
FU National Institutes of Health [GM65830, GM48071]; National Science
Foundation of China [10775114]
FX This work was supported by National Institutes of Health grants GM65830
and GM48071. J. S. also acknowledges support from the National Science
Foundation of China under grant No. 10775114.
NR 51
TC 24
Z9 26
U1 0
U2 1
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 OCT 15
PY 2008
VL 95
IS 8
BP 3738
EP 3752
DI 10.1529/biophysj.108.137182
PG 15
WC Biophysics
SC Biophysics
GA 352NM
UT WOS:000259503900020
PM 18641077
ER
PT J
AU Long, H
Chang, CH
King, PW
Ghirardi, ML
Kim, K
AF Long, Hai
Chang, Christopher H.
King, Paul W.
Ghirardi, Maria L.
Kim, Kwiseon
TI Brownian dynamics and molecular dynamics study of the association
between hydrogenase and ferredoxin from Chlamydomonas reinhardtii
SO BIOPHYSICAL JOURNAL
LA English
DT Article
ID PROTEIN-PROTEIN ASSOCIATION; PHOTOSYNTHETIC ELECTRON-TRANSPORT;
SITE-DIRECTED MUTAGENESIS; GREEN-ALGA; PHOTOBIOLOGICAL PRODUCTION;
DIFFUSIONAL ASSOCIATION; COMPUTER-SIMULATION; ENCOUNTER COMPLEXES;
METABOLIC PATHWAYS; ENERGY LANDSCAPE
AB The [FeFe] hydrogenase from the green alga Chlamydomonas reinhardtii can catalyze the reduction of protons to hydrogen gas using electrons supplied from photosystem I and transferred via ferredoxin. To better understand the association of the hydrogenase and the ferredoxin, we have simulated the process over multiple timescales. A Brownian dynamics simulation method gave an initial thorough sampling of the rigid-body translational and rotational phase spaces, and the resulting trajectories were used to compute the occupancy and free-energy landscapes. Several important hydrogenase-ferredoxin encounter complexes were identified from this analysis, which were then individually simulated using atomistic molecular dynamics to provide more details of the hydrogenase and ferredoxin interaction. The ferredoxin appeared to form reasonable complexes with the hydrogenase in multiple orientations, some of which were good candidates for inclusion in a transition state ensemble of configurations for electron transfer.
C1 [Long, Hai; Chang, Christopher H.; 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 Chang, Christopher/A-1404-2012; King, Paul/D-9979-2011; Long,
Hai/C-5838-2015
OI Chang, Christopher/0000-0003-3800-6021; King, Paul/0000-0001-5039-654X;
FU U.S. Department of Energy's National Renewable Energy Laboratory (NREL).
FX 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 66
TC 16
Z9 18
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 OCT 15
PY 2008
VL 95
IS 8
BP 3753
EP 3766
DI 10.1529/biophysj.107.127548
PG 14
WC Biophysics
SC Biophysics
GA 352NM
UT WOS:000259503900021
PM 18621810
ER
PT J
AU Greene, AC
Trent, AM
Bachand, GD
AF Greene, Adrienne C.
Trent, Amanda M.
Bachand, George D.
TI Controlling kinesin motor proteins in nanoengineered systems through a
metal-binding on/off switch
SO BIOTECHNOLOGY AND BIOENGINEERING
LA English
DT Article
DE motor proteins; nanotechnology; zinc; biomolecular motors; protein
engineering
ID HAND-OVER-HAND; MOLECULAR MOTORS; CHEMICAL SWITCH; ATPASE ACTIVITY;
DNA-MOLECULES; IN-VITRO; MICROTUBULE; TRANSPORT; DRIVEN; SURFACES
AB A significant challenge in utilizing kinesin biomolecular motors in integrated nanoscale systems is the ability to regulate motor function in vitro. Here we report a versatile mechanism for reversibly controlling the function of kinesin biomolecular motors independent of the fuel supply (ATP). Our approach relied on inhibiting conformational changes in the neck-linker region of kinesin, a process necessary for microtubule transport. We introduced a chemical switch into the neck-linker of kinesin by genetically engineering three histidine residues to create a Zn2+-binding site. Gliding motility of microtubules by the 2 mutant kinesin was successfully inhibited by >= 10 mu M Zn2+, as well as other divalent metals. Motility was successfully fully restored by removal of Zn2+ using a number of different chelators. Lastly, we demonstrated the robust and cyclic nature of the switch using sequential Zn2+/chelator additions. Overall, this approach to controlling motor function is highly advantageous as it enables control of individual classes of biomolecular motors while maintaining a consistent level of fuel For all motors in a given system or device.
C1 [Greene, Adrienne C.; Trent, Amanda M.; Bachand, George D.] Sandia Natl Labs, Biomol Interfaces & Syst Dept, Albuquerque, NM 87111 USA.
RP Bachand, GD (reprint author), Sandia Natl Labs, Biomol Interfaces & Syst Dept, POB 5800,MS 1413, Albuquerque, NM 87111 USA.
EM gdbacha@sandia.gov
OI Bachand, George/0000-0002-3169-9980
FU Department of Energy Office of Basic Energy Sciences; Sandia's
Laboratory Directed Research and Development Office; United States
Department of Energy's National Nuclear Security Administration
[DE-AC04-94AL85000]
FX This work was supported by the Division of Materials Sciences and
Engineering in the Department of Energy Office of Basic Energy Sciences
and Sandia's Laboratory Directed Research and Development Office. 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 55
TC 14
Z9 15
U1 1
U2 9
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 OCT 15
PY 2008
VL 101
IS 3
BP 478
EP 486
DI 10.1002/bit.21927
PG 9
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA 350NF
UT WOS:000259358700007
PM 18512258
ER
PT J
AU Maxwell, CA
Fleisch, MC
Costes, SV
Erickson, AC
Boissiere, A
Gupta, R
Ravani, SA
Parvin, B
Barcellos-Hoff, MH
AF Maxwell, Christopher A.
Fleisch, Markus C.
Costes, Sylvain V.
Erickson, Anna C.
Boissiere, Arnaud
Gupta, Rishi
Ravani, Shraddha A.
Parvin, Bahram
Barcellos-Hoff, Mary Helen
TI Targeted and Nontargeted Effects of Ionizing Radiation That Impact
Genomic Instability
SO CANCER RESEARCH
LA English
DT Article
ID MAMMARY EPITHELIAL-CELLS; GROWTH-FACTOR-BETA; CHROMOSOMAL INSTABILITY;
TGF-BETA; DNA-DAMAGE; CENTROSOME AMPLIFICATION; BREAST-CANCER; IN-VIVO;
TUMOR-SUPPRESSOR; GENOTOXIC STRESS
AB Radiation-induced genomic instability, in which the progeny of irradiated cells display a high frequency of nonclonal genomic damage, occurs at a frequency inconsistent with mutation. We investigated the mechanism of this nontargeted effect in human mammary epithelial cells (HMEC) exposed to low doses of radiation. We identified a centrosome-associated expression signature in irradiated HMEC and show here that centrosome deregulation occurs in the first cell cycle after irradiation, is dose dependent, and that viable daughters of these cells are genomically unstable as evidenced by spontaneous DNA damage, tetraploidy, and aneuploidy. Clonal analysis of genomic instability showed a threshold of >10 cGy. Treatment with transforming growth factor beta 1 (TGF beta), which is implicated in regulation of genomic stability and is activated by radiation, reduced both the centrosome expression signature and centrosome aberrations in irradiated HMEC. Furthermore, TGF beta inhibition significantly increased centrosome aberration frequency, tetraploidy, and aneuploidy in nonirradiated HMEC. Rather than preventing radiation-induced or spontaneous centrosome aberrations, TGF beta selectively deleted unstable cells via p53-dependent apoptosis. Together, these studies show that radiation deregulates centrosome stability, which underlies genomic instability in normal human epithelial cells, and that this can be opposed by radiation-induced TGF beta signaling. [Cancer Res 2008;68(20):8304-11]
C1 [Maxwell, Christopher A.; Fleisch, Markus C.; Costes, Sylvain V.; Erickson, Anna C.; Boissiere, Arnaud; Gupta, Rishi; Ravani, Shraddha A.; Parvin, Bahram; Barcellos-Hoff, Mary Helen] Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA.
RP Barcellos-Hoff, MH (reprint author), Lawrence Berkeley Natl Lab, Div Life Sci, 1 Cyclotron Rd,Bldg 977, Berkeley, CA 94720 USA.
EM mhbarcellos-hoff@nyumc.org
RI Maxwell, Christopher/B-3044-2011; Fleisch, Markus/E-4134-2014
OI Maxwell, Christopher/0000-0002-0860-4031; Fleisch,
Markus/0000-0002-8966-4721
FU Department of Energy Office of Biological; Environmental Research Low
Dose Radiation Program; Office of Health and Environmental Research;
Health Effects Division; United States Department of Energy
[03-76SF00098]; NASA Specialized Center of Research; Department of
Defense (DOD) [BCRP050612]
FX Department of Energy Office of Biological and Environmental Research Low
Dose Radiation Program and the Office of Health and Environmental
Research, Health Effects Division, United States Department of Energy
(contract no. 03-76SF00098) and NASA Specialized Center of Research.
Department of Defense (DOD) BCRP050612 postdoctoral fellowship supported
C.A. Maxwell, and a DOD postdoctoral training grant supported A.C.
Erickson.
NR 50
TC 31
Z9 35
U1 0
U2 3
PU AMER ASSOC CANCER RESEARCH
PI PHILADELPHIA
PA 615 CHESTNUT ST, 17TH FLOOR, PHILADELPHIA, PA 19106-4404 USA
SN 0008-5472
J9 CANCER RES
JI Cancer Res.
PD OCT 15
PY 2008
VL 68
IS 20
BP 8304
EP 8311
DI 10.1158/0008-5472.CAN-08-1212
PG 8
WC Oncology
SC Oncology
GA 364GE
UT WOS:000260323400014
PM 18922902
ER
PT J
AU Pointon, TD
AF Pointon, T. D.
TI Second-order, exact charge conservation for electromagnetic
particle-in-cell simulation in complex geometry
SO COMPUTER PHYSICS COMMUNICATIONS
LA English
DT Article
DE Particle-in-cell; Plasma simulation; Charge conservation; Energy
conservation
ID IMPLICIT PLASMA SIMULATION; GAUSS LAW; CODES; PERFORMANCE
AB A second-order, exact charge-conserving algorithm for accumulating charge and current on the spatial grid for electromagnetic particle-in-cell (EM-PIC) simulation in bounded geometry is presented. The algorithm supports standard EM-PIC exterior boundary conditions and complex internal conductors on non-uniform grids. Boundary surfaces are handled by smoothly transitioning from second to first-order weighting within half a cell of the boundary. When a particle is exactly on the boundary surface (either about to be killed, or just created), the weighting is fully first-order. This means that particle creation and particle/surface interaction models developed for first-order weighting do not need to be modified. An additional feature is the use of an energy-conserving interpolation scheme from the electric field on the grid to the particles. Results show that high-density, cold plasmas with omega(pe) Delta t similar to 1, and Delta(x)/lambda(D) >> 1, can be modeled with reasonable accuracy and good energy conservation. This opens up a significant new capability for explicit simulation of high-density plasmas in high-power devices. (C) 2008 Elsevier B.V. All rights reserved.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Pointon, TD (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM tdpoint@sandia.gov
FU Sandia Corporation; Lockheed Martin company; United States Department of
Energy's National Nuclear Security Administration [DE-AC04-94-AL85000]
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
DE-AC04-94-AL85000.
NR 23
TC 4
Z9 4
U1 1
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0010-4655
J9 COMPUT PHYS COMMUN
JI Comput. Phys. Commun.
PD OCT 15
PY 2008
VL 179
IS 8
BP 535
EP 544
DI 10.1016/j.cpc.2008.04.017
PG 10
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 363PX
UT WOS:000260280300001
ER
PT J
AU Hankel, M
Smith, SC
Gray, SK
Balint-Kurti, GG
AF Hankel, Marlies
Smith, Sean C.
Gray, Stephen K.
Balint-Kurti, Gabriel G.
TI DIFFREALWAVE: A parallel real wavepacket code for the quantum mechanical
calculation of reactive state-to-state differential cross sections in
atom plus diatom collisions
SO COMPUTER PHYSICS COMMUNICATIONS
LA English
DT Article
DE Wavepackets; Reactive scattering; Quantum dynamics; Parallel computing
ID TIME-DEPENDENT QUANTUM; POTENTIAL-ENERGY SURFACES; WAVE-PACKET;
SCHRODINGER-EQUATION; TRIATOMIC-MOLECULES; SCATTERING; DYNAMICS;
PHOTOFRAGMENTATION; PHOTODISSOCIATION; APPROXIMATION
AB A parallel computer code for the calculation of quantum state-to-state atom-diatom differential reactive cross sections is presented and discussed. The code is based on the real wavepacket approach. The theory underlying the code is discussed and the parallelisation methods used are described. All the input parameters needed by the program are described. Results of test calculations to investigate the scaling properties of the code with grid size and number of processors are presented. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Hankel, Marlies; Smith, Sean C.] Univ Queensland, Ctr Computat Mol Sci, Brisbane, Qld 4072, Australia.
[Gray, Stephen K.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England.
RP Hankel, M (reprint author), Univ Queensland, Ctr Computat Mol Sci, Brisbane, Qld 4072, Australia.
EM m.hankel@uq.edu.au; s.smith@uq.edu.au; gray@tcg.anl.gov;
gabriel.balint-kurti@bris.ac.uk
RI Hankel, Marlies/C-6262-2009; Smith, Sean/H-5003-2015
OI Hankel, Marlies/0000-0002-8297-7231; Smith, Sean/0000-0002-5679-8205
FU Office of Basic Energy Sciences; Division of Chemical Sciences; US
Department of Energy [DE-AC02-06CH11357]; Centre for Computational
Molecular Science; Australian Institute for Bioengineering and
Nanotechnology; University of Queensland, Australia; University of
Queensland and the Queensland Smart State Research Facilities Fund; APAC
National Facility
FX SKG was supported by the Office of Basic Energy Sciences, Division of
Chemical Sciences, Geosciences, and Biosciences, US Department of
Energy, under Contract No. DE-AC02-06CH11357. MH would like to thank the
University of Queensland and Sun Microsystems for funding. The
calculations reported in this paper have been performed on the
Computational Molecular Science computational facility housed by the
Centre for Computational Molecular Science, Australian Institute for
Bioengineering and Nanotechnology, University of Queensland, Australia.
These computational facilities have been purchased from funds provided
by the University of Queensland and the Queensland Smart State Research
Facilities Fund. The shared memory calculations were supported by an
award under the Merit Allocation Scheme on the APAC National Facility at
the ANU, Australia.
NR 58
TC 27
Z9 27
U1 2
U2 12
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0010-4655
J9 COMPUT PHYS COMMUN
JI Comput. Phys. Commun.
PD OCT 15
PY 2008
VL 179
IS 8
BP 569
EP 578
DI 10.1016/j.cpc.2008.05.004
PG 10
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 363PX
UT WOS:000260280300005
ER
PT J
AU Farber, DL
Meriaux, AS
Finkel, RC
AF Farber, Daniel L.
Meriaux, Anne-Sophie
Finkel, Robert C.
TI Attenuation length for fast nucleon production of Be-10 derived from
near-surface production profiles
SO EARTH AND PLANETARY SCIENCE LETTERS
LA English
DT Article
DE attenuation length; cosmogenic radionuclide; 10Be; geochronology;
Quaternary; Sierra Nevada
ID COSMOGENIC NUCLIDES; PRODUCTION-RATES; EROSION RATES; SIERRA-NEVADA;
AL-26; SEDIMENT; QUARTZ; RADIONUCLIDES; HELIUM; BURIAL
AB We have measured the fast nucleon production of Be-10 to depths of 2.37 m (659 g/cm(2)) in a granodiorite core of uniform density and composition from the Mt. Givens pluton on the western side of the Sierra Nevada, California, at 37 degrees 14.7' N, 118 degrees 53.7' W and 2286 m. The data are well fit with a simple exponential decrease yielding an apparent attenuation length of Be-10 production of 177 + 4 (2 sigma) g/cm(2). The shallowest data point is from a depth of 1.24 cm (3.45 g/cm(2)) and shows no indication of a near-surface flattening of the radionuclide inventory and hence the Be-10 production rate. Published by Elsevier B.V.
C1 [Farber, Daniel L.] Univ Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95064 USA.
[Farber, Daniel L.; Meriaux, Anne-Sophie] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Finkel, Robert C.] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
RP Farber, DL (reprint author), Univ Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95064 USA.
EM dfarber@ucsc.edu; a.s.meriaux@ncl.ac.uk; finkel@llnl.gov
RI Meriaux, Anne-Sophie/G-1754-2010; Farber, Daniel/F-9237-2011
FU NSF-EAR [0345895]
FX This work was supported by NSF-EAR 0345895 (DLF). We thank Bob Anderson
and an anonymous reviewer for insightful comments that significantly
improved and clarified the manuscript.
NR 35
TC 14
Z9 14
U1 0
U2 8
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 OCT 15
PY 2008
VL 274
IS 3-4
BP 295
EP 300
DI 10.1016/j.epsl.2008.07.015
PG 6
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 390GV
UT WOS:000262153200002
ER
PT J
AU Wan, JM
Tokunaga, TK
Kim, YM
Brodie, E
Daly, R
Hazen, TC
Firestone, MK
AF Wan, Jiamin
Tokunaga, Tetsu K.
Kim, Yongman
Brodie, Eoin
Daly, Rebecca
Hazen, Terry C.
Firestone, Mary K.
TI Effects of Organic Carbon Supply Rates on Uranium Mobility in a
Previously Bioreduced Contaminated Sediment
SO ENVIRONMENTAL SCIENCE & TECHNOLOGY
LA English
DT Article
ID SUBSURFACE SEDIMENTS; REDUCING BACTERIA; REDUCTION; IRON; REOXIDATION;
SULFATE; IMMOBILIZATION; SOLUBILITY; AQUIFER; NITRATE
AB Bioreduction-based strategies for remediating uranium (U)-contaminated sediments face the challenge of maintaining the reduced status of U for long times. Because groundwater influxes continuously bring in oxidizing terminal electron acceptors (O-2, NO3-), it is necessary to continue supplying organic carbon (OC) to maintain the reducing environment after U bioreduction is achieved. We tested the influence of OC supply rates on mobility of previously microbial reduced uranium U(IV) in contaminated sediments. We found that high degrees of U mobilization occurred when OC supply rates were high, and when the sediment still contained abundant Fe(Ill). Although 900 days with low levels of OC supply minimized U mobilization, the sediment redox potential increased with time as did extractable U(VI) fractions. Molecular analyses of total microbial activity demonstrated a positive correlation with OC supply and analyses of Geobacteraceae activity (RT-qPCR of 16S rRNA) indicated continued activity even when the effluent Fe(II) became undetectable. These data support our hypothesis on the mechanisms responsible for remobilization of U under reducing conditions; that microbial respiration caused increased (bi)carbonate concentration and formation of stable uranyl carbonate complexes, thereby shifted U(IV)/U(VI) equilibrium to more reducing potentials. The data also suggested that low OC concentrations could not sustain the reducing condition of the sediment for much longer time. Bioreduced U(IV) is not sustainable in an oxidizing environment for a very long time.
C1 [Wan, Jiamin; Tokunaga, Tetsu K.; Brodie, Eoin; Hazen, Terry C.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Wan, JM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM jwan@lbl.gov
RI Tokunaga, Tetsu/H-2790-2014; Wan, Jiamin/H-6656-2014; Brodie,
Eoin/A-7853-2008; Kim, Yongman/D-1130-2015; Hazen, Terry/C-1076-2012
OI Tokunaga, Tetsu/0000-0003-0861-6128; Brodie, Eoin/0000-0002-8453-8435;
Kim, Yongman/0000-0002-8857-1291; Hazen, Terry/0000-0002-2536-9993
FU U.S. Department of Energy [DE-AC03-76SF-00098]; Environmental
Remediation Science Program (ERSP)
FX This work was carried out under U.S. Department of Energy contract no.
DE-AC03-76SF-00098. Funding from the U.S. Department of Energy,
Environmental Remediation Science Program (ERSP) is gratefully
acknowledged. We thank the anonymous reviewers and the associate editor
Gary Sayler for their constructive review comments.
NR 25
TC 22
Z9 22
U1 2
U2 15
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0013-936X
J9 ENVIRON SCI TECHNOL
JI Environ. Sci. Technol.
PD OCT 15
PY 2008
VL 42
IS 20
BP 7573
EP 7579
DI 10.1021/es800951h
PG 7
WC Engineering, Environmental; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA 359LO
UT WOS:000259988400008
PM 18983077
ER
PT J
AU Martinez-Perez, E
Schvarzstein, M
Barroso, C
Lightfoot, J
Dernburg, AF
Villeneuve, AM
AF Martinez-Perez, Enrique
Schvarzstein, Mara
Barroso, Consuelo
Lightfoot, James
Dernburg, Abby F.
Villeneuve, Anne M.
TI Crossovers trigger a remodeling of meiotic chromosome axis composition
that is linked to two-step loss of sister chromatid cohesion
SO GENES & DEVELOPMENT
LA English
DT Article
DE Meiosis; chromosome axes; crossover; sister chromatid cohesion;
chromosome remodeling; crossover interference
ID CAENORHABDITIS-ELEGANS MEIOSIS; C-ELEGANS; CROSSING-OVER; CHIASMA
FORMATION; SYNAPTONEMAL COMPLEX; HOMOLOG ALIGNMENT; HOP1 GENE; SYNAPSIS;
PROTEIN; RECOMBINATION
AB Segregation of homologous chromosomes during meiosis depends on linkages ( chiasmata) created by crossovers and on selective release of a subset of sister chromatid cohesion at anaphase I. During Caenorhabditis elegans meiosis, each chromosome pair forms a single crossover, and the position of this event determines which chromosomal regions will undergo cohesion release at anaphase I. Here we provide insight into the basis of this coupling by uncovering a large-scale regional change in chromosome axis composition that is triggered by crossovers. We show that axial element components HTP-1 and HTP-2 are removed during late pachytene, in a crossover-dependent manner, from the regions that will later be targeted for anaphase I cohesion release. We demonstrate correspondence in position and number between chiasmata and HTP-1/2-depleted regions and provide evidence that HTP-1/2 depletion boundaries mark crossover sites. In htp-1 mutants, diakinesis bivalents lack normal asymmetrical features, and sister chromatid cohesion is prematurely lost during the meiotic divisions. We conclude that HTP-1 is central to the mechanism linking crossovers with late-prophase bivalent differentiation and defines the domains where cohesion will be protected until meiosis II. Further, we discuss parallels between the pattern of HTP-1/2 removal in response to crossovers and the phenomenon of crossover interference.
C1 [Martinez-Perez, Enrique; Barroso, Consuelo; Lightfoot, James] Univ Sheffield, Dept Mol Biol & Biotechnol, Sheffield S10 2TN, S Yorkshire, England.
[Schvarzstein, Mara; Villeneuve, Anne M.] Stanford Univ, Dept Dev Biol, Stanford, CA 94305 USA.
[Dernburg, Abby F.] EO Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA.
[Dernburg, Abby F.] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
RP Martinez-Perez, E (reprint author), Univ Sheffield, Dept Mol Biol & Biotechnol, Sheffield S10 2TN, S Yorkshire, England.
EM E.Martinez-Perez@Sheffield.ac.uk
OI Dernburg, Abby/0000-0001-8037-1079
FU BBSRC; NIH [R01GM53804, R01GM67268]; CIHR
FX We thank the Caenorhabditis Genetics Center, the Gene Knockout
Consortium and the National Bioresource Project for strains; A.
Straight, B. Meyer, and J. Schumacher for antibodies; A. Goldman for
critical reading of the manuscript; and S. Wignall for timely
experimental assistance in the final stages of this work. This work was
supported by a BBSRC David Phillips Fellowship to E. M.-P., a BBSRC
post-doctoral contract to C. B., a BBSRC Studentship to J. L., NIH
grants R01GM53804 and R01GM67268 to A. M. V., and a CIHR fellowship to
M. S.
NR 54
TC 57
Z9 60
U1 0
U2 3
PU COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT
PI WOODBURY
PA 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2924 USA
SN 0890-9369
J9 GENE DEV
JI Genes Dev.
PD OCT 15
PY 2008
VL 22
IS 20
BP 2886
EP 2901
DI 10.1101/gad.1694108
PG 16
WC Cell Biology; Developmental Biology; Genetics & Heredity
SC Cell Biology; Developmental Biology; Genetics & Heredity
GA 360QT
UT WOS:000260073200015
PM 18923085
ER
PT J
AU Burgos, WD
McDonough, JT
Senko, JM
Zhang, GX
Dohnalkova, AC
Kelly, SD
Gorby, Y
Kemner, KM
AF Burgos, William D.
McDonough, Jeffrey T.
Senko, John M.
Zhang, Gengxin
Dohnalkova, Alice C.
Kelly, Shelly D.
Gorby, Yuri
Kemner, Kenneth M.
TI Characterization of uraninite nanoparticles produced by Shewanella
oneidensis MR-1
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID TERMINAL ELECTRON-ACCEPTORS; ABSORPTION FINE-STRUCTURE; METAL-REDUCING
BACTERIUM; MICROBIAL REDUCTION; PUTREFACIENS MR-1; U(VI) REDUCTION;
OUTER-MEMBRANE; URANIUM; FE(III); GROWTH
AB The reduction of uranium(VI) by Shewanella oneidensis MR-1 was studied to examine the effects of bioreduction kinetics and background electrolyte on the physical properties and reactivity to re-oxidation of the biogenic uraninite, UO2(s). Bioreduction experiments were conducted with uranyl acetate as the electron acceptor and sodium lactate as the electron donor under resting cell conditions in a 30 mM NaHCO3 buffer, and in a PIPES-buffered artificial groundwater (PBAGW). MR-1 was cultured in batch mode in a defined minimal medium with a specified air-to-medium volume ratio such that electron acceptor (02) limiting conditions were reached just when cells were harvested for subsequent experiments. The rate of U(VI) bioreduction was manipulated by varying the cell density and the incubation temperature (1.0 x 10(8) cell ml(-1) at 20 degrees C or 2.0 x 10(8) cell ml(-1) at 37 degrees C) to generate U(IV) solids at "fast" and "slow" rates in the two different buffers. The presence of Ca in PBAGW buffer altered U(VI) speciation and solubility, and significantly decreased U(VI) bioreduction kinetics. High resolution transmission electron microscopy was used to measure uraninite particle size distributions produced under the four different conditions. The most common primary particle size was 2.9-3.0 ran regardless of U(VI) bioreduction rate or background electrolyte. Extended X-ray absorption fine-structure spectroscopy was also used to estimate uraninite particle size and was consistent with TEM results. The reac-tivity of the biogenic uraninite products with dissolved oxygen was tested, and neither U(VI) bioreduction rate nor background electrolyte had any statistical effect on oxidation rates. With MR-1, uraninite particle size was not controlled by the bioreduction rate of U(VI) or the background electrolyte. These results for MR-1, where U(VI) bioreduction rate had no discernible effect on uraninite particle size or oxidation rate, contrast with our recent research with Shewanella putrefaciens CN32, where U(VI) bioreduction rate strongly influenced both uraninite particle size and oxidation rate. These two studies with Shewanella species can be viewed as consistent if one assumes that particle size controls oxidation rates, so the similar uraninite particle sizes produced by MR-1 regardless of U(VI) bioreduction rate would result in similar oxidation rates. Factors that might explain why U(VI) bioreduction rate was an important control on uraninite particle size for CN32 but not for MR-1 are discussed. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Burgos, William D.; McDonough, Jeffrey T.; Senko, John M.; Zhang, Gengxin] Penn State Univ, Dept Civil & Environm Engn, University Pk, PA 16802 USA.
[Dohnalkova, Alice C.] Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA.
[Kelly, Shelly D.; Kemner, Kenneth M.] Argonne Natl Lab, Biosci Div, Argonne, IL 60439 USA.
[Gorby, Yuri] J Craig Venter Inst, La Jolla, CA USA.
RP Burgos, WD (reprint author), Penn State Univ, Dept Civil & Environm Engn, 212 Sackett Bldg, University Pk, PA 16802 USA.
EM wdb3@psu.edu
RI ID, MRCAT/G-7586-2011
FU Environmental Remediation Science Program (ERSP); Office of Biological
and Environmental Research (BER); Environmental Remediation Science
Division (ERSD); US Department of Energy (DOE) [DE-FG02-04ER63914];
National Science Foundation [CHE-0431328]; U.S. Department of Energy;
Biological and Environmental Research (BER); US DOE; Office of Science,
Office of Basic Energy Sciences; Office of Biological and Environmental
Research [W-31-109-ENG-38]; MRCAT member institutions; Battelle Memorial
Institute [DE-AC06-76RL0 1830]
FX This work was supported by the Environmental Remediation Science Program
(ERSP), Office of Biological and Environmental Research (BER),
Environmental Remediation Science Division (ERSD), US Department of
Energy (DOE) Grant No. DE-FG02-04ER63914 to The Pennsylvania State
University, and by the National Science Foundation under Grant No.
CHE-0431328 and the U.S. Department of Energy, Biological and
Environmental Research (BER). Use of the MR-CAT sector at the Advanced
Photon Source (APS) and of the APS was supported by the US DOE, Office
of Science, Office of Basic Energy Sciences and Office of Biological and
Environmental Research, under contract W-31-109-ENG-38 and the MRCAT
member institutions. We extend our gratitude to Bruce Ravel and Maxim
Boyanov (ANL) for their assistance with the EXAFS data collection and to
BR for his contribution to the interpretation and correction of the
EXAFS spectra. Part of this work was performed at the Environmental
Molecular Sciences Laboratory (EMSL), a national scientific user
facility sponsored by the DOE's OBER, located at the Pacific Northwest
National Laboratory (PNNL) in Richland, WA. PNNL is operated for DOE by
Battelle Memorial Institute under Contract DE-AC06-76RL0 1830.
NR 60
TC 66
Z9 70
U1 4
U2 36
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 OCT 15
PY 2008
VL 72
IS 20
BP 4901
EP 4915
DI 10.1016/j.gca.2008.07.016
PG 15
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 360DV
UT WOS:000260038200001
ER
PT J
AU Hammer, O
Dysthe, DK
Lelu, B
Lund, H
Meakin, P
Jamtveit, B
AF Hammer, O.
Dysthe, D. K.
Lelu, B.
Lund, H.
Meakin, P.
Jamtveit, B.
TI Calcite precipitation instability under laminar, open-channel flow
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID TROLL THERMAL SPRINGS; DISSOLUTION KINETICS; GROWTH; SYSTEMS; INTERFACE;
STABILITY; CARBONATE; MECHANISM; DIFFUSION; SVALBARD
AB We present a 2D numerical model for the growth of calcite from supersaturated aqueous solutions under laminar, open-channel flow conditions. The model couples solution chemistry, precipitation at solution/calcite interfaces, hydrodynamics, diffusion and degassing. The model output is compared with experimental results obtained using an oversaturated calcite solution produced by mixing CaCl2 and Na2CO3. The precipitation rate is observed to increase when the supersaturated solution flows over an obstruction, leading to a growth instability that causes the formation of terraces. At relatively high flow rates, the most important mechanism for this behaviour seems to be hydrodynamic advection of dissolved species either towards or away from the calcite surface, depending on location relative to the obstruction, which deforms the concentration gradients. At lower flow rates, steepening of diffusion gradients around protrusions becomes important. Enhanced degassing over the obstruction due to shallowing and pressure drop is not important on small scales. Diffusion controlled transport close to the calcite surface can lead to a fingering-type growth instability, which generates porous textures. Our results are consistent with existing diffusive boundary layer theory, but for flow over non-smooth surfaces, simple calcite precipitation models that include empirical correlations between fluid flow rate and calcite precipitation rate are inaccurate. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Hammer, O.; Dysthe, D. K.; Lelu, B.; Lund, H.; Meakin, P.; Jamtveit, B.] Univ Oslo, N-0316 Oslo, Norway.
[Lelu, B.] Ecole Normale Super Lyon, F-69364 Lyon 07, France.
[Lund, H.] Norwegian Univ Sci & Technol, N-7491 Trondheim, Norway.
[Meakin, P.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Hammer, O (reprint author), Univ Oslo, POB 1048, N-0316 Oslo, Norway.
EM ohammer@nhm.uio.no; d.k.dysthe@fys.uio.no
RI Dysthe, Dag Kristian/F-2247-2011; Lund, Halvor/O-6637-2016; Hammer,
Oyvind/A-6319-2017;
OI Dysthe, Dag Kristian/0000-0001-8336-5061; Lund,
Halvor/0000-0002-9177-0064; Jamtveit, Bjorn/0000-0001-5700-1803
FU Norwegian Research Council
FX This study was supported by a Center of Excellence grant to PGP from the
Norwegian Research Council.
NR 35
TC 16
Z9 16
U1 3
U2 18
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 OCT 15
PY 2008
VL 72
IS 20
BP 5009
EP 5021
DI 10.1016/j.gca.2008.07.028
PG 13
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 360DV
UT WOS:000260038200009
ER
PT J
AU Jacquat, O
Voegelin, A
Villard, A
Marcus, MA
Kretzschmar, R
AF Jacquat, Olivier
Voegelin, Andreas
Villard, Andre
Marcus, Matthew A.
Kretzschmar, Ruben
TI Formation of Zn-rich phyllosilicate, Zn-layered double hydroxide and
hydrozincite in contaminated calcareous soils
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID X-RAY-FLUORESCENCE; PRINCIPAL COMPONENT ANALYSIS; FINE-STRUCTURE
SPECTROSCOPY; EXAFS SPECTROSCOPY; ABSORPTION SPECTROSCOPY;
MICROMETER-SCALE; SEQUENTIAL EXTRACTION; NATURAL SPECIATION; DREDGED
SEDIMENT; ZINC SPECIATION
AB Recent studies demonstrated that Zn-phyllosilicate- and Zn-layered double hydroxide-type (Zn-LDH) precipitates may form in contaminated soils. However, the influence of soil properties and Zn content on the quantity and type of precipitate forming has not been studied in detail so far. In this work, we determined the speciation of Zn in six carbonate-rich surface soils (pH 6.2-7.5) contaminated by aqueous Zn in the runoff from galvanized power line towers (1322-30,090 mg/kg Zn). Based on 12 bulk and 23 micro-focused extended X-ray absorption fine structure (EXAFS) spectra, the number, type and proportion of Zn species were derived using principal component analysis, target testing, and linear combination fitting. Nearly pure Zn-rich phyllosilicate and Zn-LDH were identified at different locations within a single soil horizon, suggesting that the local availabilities of Al and Si controlled the type of precipitate forming. Hydrozincite was identified on the surfaces of limestone particles that were not in direct contact with the soil clay matrix. With increasing Zn loading of the soils, the percentage of precipitated Zn increased from similar to 20% to similar to 80%, while the precipitate type shifted from Zn-phyllosilicate and/or Zn-LDH at the lowest studied soil Zn contents over predominantly Zn-LDH at intermediate loadings to hydrozincite in extremely contaminated soils. These trends were in agreement with the solubility of Zn in equilibrium with these phases. Sequential extractions showed that large fractions of soil Zn (similar to 30-80%) as well as of synthetic Zn-kerolite, Zn-LDH, and hydrozincite spiked into uncontaminated soil were readily extracted by 1M NH4NO3 followed by 1M NH4-acetate at pH 6.0. Even though the formation of Zn-precipitates allows for the retention of Zn in excess to the adsorption capacity of calcareous soils, the long-term immobilization potential of these precipitates is limited. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Jacquat, Olivier; Voegelin, Andreas; Kretzschmar, Ruben] ETH, Dept Environm Sci, Inst Biogeochem & Pollutant Dynam, CHN, CH-8092 Zurich, Switzerland.
[Villard, Andre] Univ Neuchatel, Inst Geol, CH-2009 Neuchatel, Switzerland.
[Marcus, Matthew A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Voegelin, A (reprint author), ETH, Dept Environm Sci, Inst Biogeochem & Pollutant Dynam, CHN, CH-8092 Zurich, Switzerland.
EM voegelin@env.ethz.ch
RI Voegelin, Andreas/B-4018-2009; Kretzschmar, Ruben/B-4579-2016
OI Voegelin, Andreas/0000-0003-2873-8966; Kretzschmar,
Ruben/0000-0003-2587-2430
FU U.S. Departement of Energy [DE-AC03-76SF00098]; Swiss National Science
Foundation [200021-101876, 200020-116592]
FX Jakob Frommer is acknowledged for fruitful discussions regarding the
analysis of XAS data. We thank Gerome Tokpa for performing the
sequential extraction of the soil samples and Kurt Barmettler for help
in the laboratory. Jon Chorover and Evert Elzinga provided valuable
feedback on earlier versions of this manuscript. The spectrum of
Zn-sorbed calcite was kindly provided by Evert Elzinga (Rutgers
University). We thank Andre Puschnig (Natural History Museum, Basel) and
Beda Hofmann (Natural History Museum, Bern) for providing smithonite and
lithophorite, respectively. Stefan Mangold (XAS, ANKA, Germany) and Kumi
Pandya (X11A, NSLS, USA) are acknowledged for their help with data
acquisition. Robert Ford, Maarten Nachtegaal and an anonymous reviewer
are thanked for their constructive comments on an earlier version of
this manuscript. The Angstromquelle Karlsruhe GmbH (ANKA, Karlsruhe,
Germany) and the Advanced Light Source (ALS, Berkeley, USA) are
acknowledged for providing beamtime. The ALS is supported by the
Director, Office of Science, Office of Basic Energy Sciences, Material
Sciences Division, of the U.S. Departement of Energy under Contract No.
DE-AC03-76SF00098 at Lawrence Berkeley National Laboratory. This project
was financially supported by the Swiss National Science Foundation under
Contracts Nos. 200021-101876 and 200020-116592.
NR 65
TC 28
Z9 28
U1 4
U2 31
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 OCT 15
PY 2008
VL 72
IS 20
BP 5037
EP 5054
DI 10.1016/j.gca.2008.07.024
PG 18
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 360DV
UT WOS:000260038200011
ER
PT J
AU Singer, DM
Johnson, SB
Catalano, JG
Farges, F
Brown, GE
AF Singer, David M.
Johnson, Stephen B.
Catalano, Jeffrey G.
Farges, Francois
Brown, Gordon E., Jr.
TI Sequestration of Sr(II) by calcium oxalate - A batch uptake study and
EXAFS analysis of model compounds and reaction products
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID X-RAY-ABSORPTION; AQUEOUS-SOLUTION; STRONTIUM(II) COORDINATION;
CRYSTAL-STRUCTURES; FINE-STRUCTURE; XAFS ANALYSIS; SORPTION;
SPECTROSCOPY; PLANTS; STRONTIANITE
AB Calcium oxalate monohydrate (CaC2O4 center dot H2O-abbreviated as CaOx) is produced by two-thirds of all plant families, comprising up to 80 wt.% of the plant tissue and found in many surface environments. It is unclear, however, how CaOx in plants and soils interacts with metal ions and possibly sequesters them. This study examines the speciation of Sr(II)(aq) following its reaction with CaOx. Batch uptake experiments were conducted over the pH range 4-10, with initial Sr solution concentrations, [Sr](aq), ranging from 1 x 10(-4) to 1 x 10(-3) M and ionic strengths ranging of 0.001-0.1 M, using NaCl as the background electrolyte. Experimental results indicate that Sr uptake is independent of pH and ionic strength over these ranges. After exposure of CaOx to Sr-aq for two days, the solution Ca concentration, [Ca](aq), increased for all samples relative to the control CaOx suspension (with no Sr added). The amount of Sraq removed from solution was nearly equal to the total [Ca](aq) after exposure of CaOx to Sr. These results suggest that nearly 90% of the Sr is removed from solution to a solid phase as Ca is released into solution. We suggest that the other 10% is sequestered through surface adsorption on a solid phase, although we have no direct evidence for this. Extended X-ray absorption fine structure (EXAFS) spectroscopy was used to determine the molecular-level speciation of Sr in the reaction products. Deconvolutions of the Sr K-edge EXAFS spectra were performed to identify multi-electron excitation (MEE) features. MEE effects were found to give rise to low-frequency peaks in the Fourier transform before the first shell of oxygen atoms and do not affect EXAFS fitting results. Because of potential problems caused by asymmetric distributions of Sr-O distances when fitting Sr K-edge EXAFS data using the standard harmonic model, we also employed, a cumulant expansion model and an asymmetric analytical model to account for anharmonic effects in the EXAFS data. For Sr-bearing phases with low to moderate first-shell (Sr-O pair correlation) anharmonicity, the cumulant expansion model is sufficient for EXAFS fitting; however, for higher degrees of anharmonicity an analytical model is. required. Based on batch uptake results and EXAFS analyses of reaction products, we conclude that Sr is dominantly sequestered by a solid phase at the CaOx surface, likely the result of a dissolution-reprecipitation mechanism, to form SrC2O4 Of mixed hydration state (i.e. SrOx.nH(2)O, where n = 0, 1, or 2). Surprisingly, no spectroscopic or XRD evidence was found for a (Sr,Ca)Ox solid solution or for a separate SrCO3 phase. In addition, we found no evidence for Sr(II) inner-sphere sorption complexes on CaOx surfaces based on lack of Sr-Ca second-neighbor pair correlations in the EXAFS spectra, although some type of Sr(II) surface complex (perhaps a type B Sr-oxalate ternary complex or an outer-sphere Sr(II) complex) or some as yet undetected Sr-bearing solid phases are needed to account for approximately 10% of Sr uptake by CaOx. The formation of a hydrated SrOx phase in environments under conditions similar to those of our experiments should retard Sr mobility and could be a significant factor in the biogeochemical cycling of Sr in soils and sediments or in plants and plant litter where CaOx is present. (C) 2008 Elsevier Ltd. All rights reserved.
C1 [Singer, David M.; Johnson, Stephen B.; Catalano, Jeffrey G.; Farges, Francois; Brown, Gordon E., Jr.] Stanford Univ, Dept Geol & Environm Sci, Surface & Aqueous Geochem Grp, Stanford, CA 94305 USA.
[Johnson, Stephen B.] Fosters Australia, Southbank, Vic 3006, Australia.
[Farges, Francois] Museum Natl Hist Nat, Unite Mineral Petrol USM 201, F-75231 Paris, France.
[Farges, Francois] CNRS, UMR 7160, Paris, France.
[Brown, Gordon E., Jr.] SLAC, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
RP Singer, DM (reprint author), Stanford Univ, Dept Geol & Environm Sci, Surface & Aqueous Geochem Grp, 450 Serra Mall,Braun Hall,Bldg 320, Stanford, CA 94305 USA.
EM dmsinger@stanford.edu
RI Catalano, Jeffrey/A-8322-2013
OI Catalano, Jeffrey/0000-0001-9311-977X
FU NSF [CHE-0431425]
FX This research was funded by NSF Grant CHE-0431425 (Stanford
Environmental Molecular Science Institute). The authors thank Guangchao
Li for performing ICP-AES analyses, Margaret Gentile for assistance in
performing IC analyses, Aaron Slowey for assistance in collecting EXAFS
spectra, and the SSRL staff for continuing beamline support. We
appreciate the constructive comments of Associate Editor P.A. O'Day and
three anonymous reviewers that improved this manuscript significantly.
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. The SSRL Structural Molecular Biology Program is
supported by Department of Energy, Office of Biological and
Environmental Research, and by the National Institute of Health,
National Center for Research Resources, Biomedical Technology Program.
NR 67
TC 6
Z9 7
U1 3
U2 25
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 OCT 15
PY 2008
VL 72
IS 20
BP 5055
EP 5069
DI 10.1016/j.gca.2008.07.020
PG 15
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 360DV
UT WOS:000260038200012
ER
PT J
AU Haynes, DJ
Berry, DA
Shekhawat, D
Xiao, TC
Green, MLH
Spivey, JJ
AF Haynes, Daniel J.
Berry, David A.
Shekhawat, Dushyant
Xiao, Tian-Cun
Green, Malcolm L. H.
Spivey, James J.
TI Partial Oxidation of n-Tetradecane over 1 wt % Pt/gamma-Al2O3 and
Co0.4Mo0.6Cx Carbide Catalysts: A Comparative Study
SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
LA English
DT Article
ID CONTACT-TIME REACTORS; TRANSITION-METAL CARBIDES; MOLYBDENUM CARBIDE;
HYDROGEN GENERATION; SYNTHESIS GAS; FUEL-CELLS; TUNGSTEN CARBIDE; LIGHT
PARAFFINS; DIESEL FUEL; METHANE
AB Catalytic partial oxidation (CPOX) of liquid fuels is being widely studied as an option for producing a hydrogen-rich gas stream for fuel cells. However, deactivation of catalysts by carbon deposition and sulfur poisoning in this process is a key technical challenge. Here, the deactivation of Co0.4Mo0.6Cx has been compared to that of 1 wt% Pt/gamma-Al2O3 in a fixed-bed catalytic reactor, using mixtures of n-tetradecane and either 1-methyl naphthalene (1-MN) or dibenzothiophene (DBT) to simulate diesel fuel. The results show that Co0.4Mo0.6Cx, is stable and active for the CPOX of n-tetradecane at 850 degrees C, 50000 scc/(g(cat) h), and an O/C ratio of 1.2. This catalyst produces slightly lower H, and CO yields than Pt/gamma-Al2O3, but still close to equilibrium values for 5 h, A low concentration Of Sulfur (50 ppmw as DBT) has little effect on either activity or selectivity for the carbide or Pt/gamma-Al2O3 catalyst. However, the presence of 1-MN or a high sulfur concentration (1000 ppmw as DBT) deactivates both catalysts, resulting in reaction products that are typical of gas-phase reactions in a blank reactor. The addition of 1-MN or 1000 ppmw DBT to n-tetradecane produces qualitatively similar results on both catalysts: H-2 production decreases continuously in the presence of either 1-MN or DBT, and CO drops to a stationary level. This drop in synthesis gas yields corresponds to an increase in steam, CO2, and olefin yields, suggesting that the contaminants deactivate sites that are active for steam and dry reforming reactions downstream of the reactor inlet, where rapid oxidation takes place. Once the contaminants are removed, initial activity returns more quickly for the carbide than for Pt/gamma-Al2O3.
C1 [Haynes, Daniel J.; Spivey, James J.] Louisiana State Univ, Dept Chem Engn, Baton Rouge, LA 70803 USA.
[Haynes, Daniel J.; Berry, David A.; Shekhawat, Dushyant] US DOE, Natl Energy Technol Lab, Morgantown, WV 26507 USA.
[Xiao, Tian-Cun; Green, Malcolm L. H.] Univ Oxford, Inorgan Chem Lab, Wolfson Catalysis Ctr, Oxford OX1 3QR, England.
RP Haynes, DJ (reprint author), Parsons, POB 618, South Pk, PA 15129 USA.
EM Daniel.haynes@pp.netl.doe-gov
FU National Energy Technology Laboratory [DE-AC26-04NT41817]
FX We gratefully acknowledge Mr. Donald Floyd for his invaluable assistance
with this investigation. This work was supported by National Energy
Technology Laboratory Contract DE-AC26-04NT41817 Subtask
41817.610.01.01.
NR 52
TC 6
Z9 6
U1 2
U2 10
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0888-5885
J9 IND ENG CHEM RES
JI Ind. Eng. Chem. Res.
PD OCT 15
PY 2008
VL 47
IS 20
BP 7663
EP 7671
DI 10.1021/ie071295t
PG 9
WC Engineering, Chemical
SC Engineering
GA 358GK
UT WOS:000259904900021
ER
PT J
AU Sun, Y
Wong, N
Guan, Y
Salamanca, CM
Cheng, JC
Lee, JM
Gray, JW
Auersperg, N
AF Sun, Yu
Wong, Nicholas
Guan, Yinghui
Salamanca, Clara M.
Cheng, Jung Chien
Lee, Jonathan M.
Gray, Joe W.
Auersperg, Nelly
TI The eukaryotic translation elongation factor eEF1A2 induces neoplastic
properties and mediates tumorigenic effects of ZNF217 in precursor cells
of human ovarian carcinomas
SO INTERNATIONAL JOURNAL OF CANCER
LA English
DT Article
DE ovarian cancer; ZNF217; EEF1A2; oncogene; ovarian epithelial cells;
neoplastic progression
ID TELOMERE DYSFUNCTION; EPITHELIAL-CELLS; BREAST-CANCER; EXPRESSION; GENE;
AMPLIFICATION; OVEREXPRESSION; IDENTIFICATION; ONCOGENE
AB Ovarian epithelial carcinomas (OECs) frequently exhibit amplifications at the 20q13 locus which is the site of several oncogenes, including the eukaryotic elongation factor EEF1A2 and the transcription factor ZNF217. We reported previously that overexpressed ZNF217 induces neoplastic characteristics in precursor cells of OEC. Unexpectedly, ZNF217, which is a transcriptional repressor, enhanced expression of eEF1A2. In our study, array comparative genomic hybridization, single nucleotide polymorphism and Affymetrix analysis of ZNF217-overexpressing cell lines confirmed consistently increased expression of eEF1A2 but not of other oncogenes, and revealed early changes in EEF1A2 gene copy numbers and increased expression at crisis during immortalization. We defined the influence of eEF1A2 overexpression on immortalized ovarian surface epithelial cells, and investigated interrelationships between effects of ZNF217 and eEF1A2 on cellular phenotypes. Lentivirally induced eEF1A2 overexpression caused delayed crisis, apoptosis resistance and increases in serum-independence, saturation densities and anchorage independence. siRNA to eEF1A2 reversed apoptosis resistance and reduced anchorage independence in eEF1A2-overexpressing lines. Remarkably, siRNA to eEF1A2 was equally efficient in inhibiting both anchorage independence and resistance to apoptosis conferred by ZNF217 overexpression. Our data define neoplastic properties that are caused by eEF1A2 in nontumorigenic ovarian cancer precursor cells, and suggest that eEF1A2 plays a role in mediating ZNF217-induced neoplastic progression. Published 2008 Wiley-Liss, Inc. This article is a U.S. Government work, and, as such, is in the public domain in the United States of America.
C1 [Auersperg, Nelly] Univ British Columbia, Dept Obstet & Gynecol, BC Womens Hosp, Vancouver, BC V6H 3V5, Canada.
[Wong, Nicholas; Guan, Yinghui; Gray, Joe W.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
[Lee, Jonathan M.] Univ Ottawa, Dept Biochem Microbiol & Immunol, Ottawa, ON, Canada.
[Gray, Joe W.] Univ Calif San Francisco, Ctr Canc, San Francisco, CA 94143 USA.
RP Auersperg, N (reprint author), Univ British Columbia, Dept Obstet & Gynecol, BC Womens Hosp, Rm 2H30,4490 Oak St, Vancouver, BC V6H 3V5, Canada.
EM auersper@interchange.ubc.ca
FU NIH [CA58207, CA112970]; Office of Health and Environmental Research;
U.S. Department of Energy [DE-AC03-76SF00098]; National Cancer Institute
of Canada; OvCaRe Canada; Avon Foundation
FX Grant sponsor: NIH; Grant numbers: CA58207, CA112970. Grant sponsor:
Office of Health and Environmental Research, U.S. Department of Energy;
Grant number: DE-AC03-76SF00098. Grant sponsors: National Cancer
Institute of Canada, OvCaRe Canada, Avon Foundation.
NR 26
TC 14
Z9 15
U1 1
U2 2
PU WILEY-LISS
PI HOBOKEN
PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0020-7136
J9 INT J CANCER
JI Int. J. Cancer
PD OCT 15
PY 2008
VL 123
IS 8
BP 1761
EP 1769
DI 10.1002/ijc.23708
PG 9
WC Oncology
SC Oncology
GA 352TA
UT WOS:000259519100004
PM 18661515
ER
PT J
AU Choudhury, S
Li, YL
Odagawa, N
Vasudevarao, A
Tian, L
Capek, P
Dierolf, V
Morozovska, AN
Eliseev, EA
Kalinin, S
Cho, YS
Chen, LQ
Gopalan, V
AF Choudhury, Samrat
Li, Yulan
Odagawa, Nozomi
Vasudevarao, Aravind
Tian, L.
Capek, Pavel
Dierolf, Volkmar
Morozovska, Anna N.
Eliseev, Eugene A.
Kalinin, Sergei
Cho, Yasuo
Chen, Long-qing
Gopalan, Venkatraman
TI The influence of 180 degrees ferroelectric domain wall width on the
threshold field for wall motion
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID SURFACE-STRUCTURE; LITHIUM-NIOBATE; MICROSCOPY; SCALE
AB Unlike ideal 180 ferroelectric walls that are a unit cell wide (similar to 0.5 nm), real walls in ferroelectrics have been reported to be many nanometers wide (1-10 nm). Using scanning nonlinear dielectric microscopy of lithium niobate (LiNbO3) and lithium tantalate (LiTaO3) ferroelectrics, we show that the wall width at surfaces can vary considerably and even reach similar to 100 nm in places where polar defects adjoin a wall. The consequence of such variable wall widths is investigated on the specific property of threshold field required for wall motion. Using microscopic phase-field modeling, we show that the threshold field for moving an antiparallel ferroelectric domain wall dramatically drops by two to three orders of magnitude if the wall was diffuse by only similar to 1-2 nm, which agrees with experimental wall widths and threshold fields for these materials. Modeling also shows that wall broadening due to its intersection with a surface will influence the threshold field for wall motion only for very thin films (1-10 nm) where the surface broadening influences the bulk wall width. Such pre-existing and slightly diffuse domain walls with low threshold fields for wall motion may offer a general mechanism to explain significantly lower experimental coercive fields for domain reversal in ferroelectrics as compared to the thermodynamic predictions. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3000459]
C1 [Choudhury, Samrat; Li, Yulan; Vasudevarao, Aravind; Tian, L.; Chen, Long-qing; Gopalan, Venkatraman] Penn State Univ, University Pk, PA 16802 USA.
[Odagawa, Nozomi; Cho, Yasuo] Tohoku Univ, Res Inst Elect Commun, Aoba Ku, Sendai, Miyagi 9808577, Japan.
[Capek, Pavel; Dierolf, Volkmar] Lehigh Univ, Dept Phys, Bethlehem, PA 18015 USA.
[Morozovska, Anna N.] Natl Acad Sci Ukraine, V Lashkarev Inst Semicond Phys, UA-03028 Kiev, Ukraine.
[Eliseev, Eugene A.] Natl Acad Sci Ukraine, Inst Problems Mat Sci, UA-03142 Kiev, Ukraine.
[Kalinin, Sergei] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Kalinin, Sergei] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Choudhury, S (reprint author), Penn State Univ, University Pk, PA 16802 USA.
EM vgopalan@psu.edu
RI Choudhury, Samrat/B-4115-2009; Chen, LongQing/I-7536-2012
OI Chen, LongQing/0000-0003-3359-3781
FU NSF [DMR-0507146, DMR-0512165, DMR-0820404, DMR-0602986]; ARO
[W911NF-04-1-0323]; DOE [DE-FG02-07ER46417]; Division of Materials
Sciences and Engineering, Office of Basic Energy Sciences, U. S.
Department of Energy [DE-AC05-00OR22725]; Oak Ridge National Laboratory
[CNMS2008-289]
FX We would like to gratefully acknowledge NSF Grant Nos. DMR-0507146,
DMR-0512165, DMR-0820404, DMR-0602986, ARO Grant No. W911NF-04-1-0323
and DOE Grant No. DE-FG02-07ER46417. Research was also sponsored in part
by the Division of Materials Sciences and Engineering, Office of Basic
Energy Sciences, U. S. Department of Energy, under Contract No.
DE-AC05-00OR22725 and CNMS2008-289 with Oak Ridge National Laboratory.
NR 36
TC 26
Z9 27
U1 2
U2 25
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 OCT 15
PY 2008
VL 104
IS 8
AR 084107
DI 10.1063/1.3000459
PG 7
WC Physics, Applied
SC Physics
GA 367SG
UT WOS:000260572100088
ER
PT J
AU Fleming, RM
Seager, CH
Lang, DV
Bielejec, E
Campbell, JM
AF Fleming, R. M.
Seager, C. H.
Lang, D. V.
Bielejec, E.
Campbell, J. M.
TI A bistable divacancylike defect in silicon damage cascades
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID LEVEL TRANSIENT SPECTROSCOPY; IRRADIATED SILICON; ELECTRON IRRADIATION
AB Two deep level transient spectroscopy (DLTS) electron emission signatures, previously labeled E4 and E5, have been shown to be bistable with respect to minority carrier injection at room temperature. These result from two charge state transitions of the same defect. We have performed DLTS measurements as function of annealing between 350 and 680 K, using minority carrier injection after each annealing stage to make E4 and E5 visible. We show that the E4-E5 pair is associated with defect clusters which dominate after neutron or ion damage with annealing characteristics that closely parallel to those of silicon divacancies found in damage clusters. At annealing temperatures above 500 K, the E4-E5 pair ceases to be bistable and exists after anneals in thermal equilibrium. We show that the stable E4 peak appears to be the same emission signature previously labeled the L center. The transformation of the E4-E5 bistable pair into the stable L center and a stable E5 companion level occurs at the same temperature, where it has been suggested that the divacancy becomes mobile. The similarity of the annealing of the E4-E5 pair to that of the divacancy, the dependence of the density of these defects on degree of clustering, and the insensitivity to common impurities combine to suggest that the E4-E5 pair is associated with primary defects located in the defect cluster and closely related to the familiar divacancy. (c) 2008 American Institute of Physics. [DOI: 10.1063/1.2991135]
C1 [Fleming, R. M.; Seager, C. H.; Lang, D. V.; Bielejec, E.; Campbell, J. M.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Fleming, RM (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM rmflemi@sandia.gov
RI Fleming, Robert/B-1248-2008
FU Sandia Corporation; Lockheed Martin Co. [DE-AC04094AL85000]
FX We thank Don King, Normand Modine, Sam Myers, Peter Schultz, George
Vizkelethy, Bill Wampler, and Alan Wright for stimulating discussions.
Sandia National Laboratories is a multiprogram laboratory operated by
Sandia Corporation, a Lockheed Martin Co., for the Department of Energy
under Contract No. DE-AC04094AL85000.
NR 31
TC 21
Z9 21
U1 0
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 OCT 15
PY 2008
VL 104
IS 8
AR 083702
DI 10.1063/1.2991135
PG 10
WC Physics, Applied
SC Physics
GA 367SG
UT WOS:000260572100046
ER
PT J
AU Lu, QM
Mao, SS
Mao, XL
Russo, RE
AF Lu, Quanming
Mao, Samuel S.
Mao, Xianglei
Russo, Richard E.
TI Theory analysis of wavelength dependence of laser-induced phase
explosion of silicon
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID ABLATION; PULSE; SI; VAPORIZATION; ALUMINUM; TARGETS; VACUUM
AB Wavelength dependence of laser ablation of silicon was investigated with nanosecond ultraviolet, visible, and infrared laser pulses in the irradiance range from 3 x 10(10) to 1 x 10(12) W/cm(2). For 266 and 532 nm laser pulses, the depth of laser-produced crater shows a dramatic increase at a laser irradiance threshold of approximately 2 x 10(10) and 4 x 10(11) W/cm(2) respectively, above which, large micron-sized particulates were observed to eject from the target about 300-400 ns after the laser pulse. In contrast, for 1064 nm pulse, this dramatic increase was not observed. The underlying mechanism for the observed threshold phenomenon is presented in this study, which can be attributed to the thermal diffusion and subsequent explosive boiling after the completion of the interaction between the nanosecond laser pulse and silicon. Based on our delayed phase explosive model, the ablation depths were calculated for different wavelengths and compared to experimental results. Plasma shielding during laser irradiation was included in the model, which plays a key role to the coupling of laser energy to the irradiated material. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2978369]
C1 [Lu, Quanming; Mao, Samuel S.; Mao, Xianglei; Russo, Richard E.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Lu, Quanming] Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China.
[Mao, Samuel S.] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA.
RP Russo, RE (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
EM rerusso@lbl.gov
FU Chemical Science Division, Office of Basic Energy Sciences, U. S.
Department of Energy [DE-AC02-05CH11231]; U. S. Department of Defense,
Army Research Office, MURI program; National Science Foundation of China
[40725013]
FX This research has been supported by the Chemical Science Division,
Office of Basic Energy Sciences, U. S. Department of Energy, under
Contract No. DE-AC02-05CH11231, and the U. S. Department of Defense,
Army Research Office, MURI program. Q. M. Lu was also supported by the
National Science Foundation of China under Grant No. 40725013.
NR 37
TC 16
Z9 18
U1 1
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 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD OCT 15
PY 2008
VL 104
IS 8
AR 083301
DI 10.1063/1.2978369
PG 7
WC Physics, Applied
SC Physics
GA 367SG
UT WOS:000260572100011
ER
PT J
AU McClure, A
Kayani, A
Idzerda, YU
Arenholz, E
Cruz, E
AF McClure, Adam
Kayani, A.
Idzerda, Y. U.
Arenholz, E.
Cruz, E.
TI Characteristics of CoxTi1-xO2 thin films deposited by metal organic
chemical vapor deposition
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID X-RAY-ABSORPTION; DOPED TIO2 ANATASE; CIRCULAR-DICHROISM;
EPITAXIAL-GROWTH; MULTILAYERS; TITANIUM; OXIDES; RUTILE
AB This paper deals with the growth and characterization of ferromagnetic cobalt doped TiO2 thin films deposited by liquid precursor metal organic chemical vapor deposition using a combination of the source materials Co (TMHD)(3), tetrahydrofuran, and titanium isopropoxide. An array of experiments reveals the intrinsic ferromagnetic nature of the grown films and suggests that the magnetism is not generated by oxygen vacancies. (C) 2008 American Institute of Physics. [DOI:10.1063/1.2998971]
C1 [McClure, Adam; Kayani, A.; Idzerda, Y. U.] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA.
[Arenholz, E.; Cruz, E.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP McClure, A (reprint author), Montana State Univ, Dept Phys, Bozeman, MT 59717 USA.
EM mcclure@physics.montana.edu
FU Office of Naval Research [N00014-03-1-092]; DOI and DOE subcontract to
PNNL [3917 (413060-A)]; Director, Office of Science, Office of Basic
Energy Sciences; U.S. Department of Energy [DE-AC02-05CH11231]
FX This research was supported by the Office of Naval Research under Grant
No. N00014-03-1-092. The authors wish to thank R. J. Smith for access to
the Ion Beam Laboratory at Montana State University, supported by DOI
and DOE subcontract to PNNL, Grant No. 3917 (413060-A). 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-AC02-05CH11231.
NR 30
TC 2
Z9 2
U1 2
U2 4
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 OCT 15
PY 2008
VL 104
IS 8
AR 084911
DI 10.1063/1.2998971
PG 4
WC Physics, Applied
SC Physics
GA 367SG
UT WOS:000260572100139
ER
PT J
AU Park, S
Fitzsimmons, MR
Majkrzak, CF
Schultz, BD
Palmstrom, CJ
AF Park, S.
Fitzsimmons, M. R.
Majkrzak, C. F.
Schultz, B. D.
Palmstrom, C. J.
TI The influence of growth temperature and annealing on the magnetization
depth profiles across ferromagnetic/semiconductor interfaces
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID EPITAXIAL FE FILMS; NEUTRON-SCATTERING; THIN-FILMS; HETEROSTRUCTURES;
MULTILAYERS; ROUGHNESS; STABILITY; GAAS(001); SYSTEMS
AB The magnetization depth profiles of three FeCo/GaAs samples grown at different temperatures and measured before and after annealing were obtained using polarized neutron reflectometry. Prior to annealing, the sample grown at 95 degrees C had the thickest magnetically degraded interfacial region between the FeCo film and the GaAs substrate. For the sample grown at -15 degrees C, the magnetic interface was sharp. For all samples, annealing promoted thicker interfacial regions with suppressed magnetization and distinct boundaries with the adjoining (FeCo or GaAs) material. Thus, the magnetic structure of the FeCo/GaAs interfacial region was very sensitive to the conditions of growth and annealing. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3000611]
C1 [Park, S.] Pusan Natl Univ, Dept Phys, Pusan 609735, South Korea.
[Park, S.; Fitzsimmons, M. R.] Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
[Majkrzak, C. F.] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
[Schultz, B. D.; Palmstrom, C. J.] Univ Minnesota, Dept Nucl Engn & Mat Sci, Minneapolis, MN 55455 USA.
RP Park, S (reprint author), Pusan Natl Univ, Dept Phys, Pusan 609735, South Korea.
EM psk@pusan.ac.kr
RI Lujan Center, LANL/G-4896-2012
FU Department of Energy's Office of Basic Energy Science; Los Alamos
National Security LLC under DOE [DE-AC52-06NA25396]; National Science
Foundation [DMR-9809364]; [DARPA-ONR N/N00014-99-11005];
[N/N00014-01-1-0830]; [ONR N/N00014-99-1-0233]
FX This work has benefited from the use of the Lujan Neutron Scattering
Center at LANSCE, which is funded by the Department of Energy's Office
of Basic Energy Science. The Los Alamos National Laboratory is operated
by Los Alamos National Security LLC under DOE Contract No.
DE-AC52-06NA25396. This work was also partially supported by the
following Contract Nos. DARPA-ONR N/N00014-99-11005, N/N00014-01-1-0830,
and ONR N/N00014-99-1-0233 and the MRSEC program of the National Science
Foundation under Award No. DMR-9809364.
NR 26
TC 7
Z9 7
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 OCT 15
PY 2008
VL 104
IS 8
AR 083905
DI 10.1063/1.3000611
PG 6
WC Physics, Applied
SC Physics
GA 367SG
UT WOS:000260572100067
ER
PT J
AU Trionfi, A
Scrymgeour, DA
Hsu, JWP
Arlen, MJ
Tomlin, D
Jacobs, JD
Wang, DH
Tan, LS
Vaia, RA
AF Trionfi, A.
Scrymgeour, D. A.
Hsu, J. W. P.
Arlen, M. J.
Tomlin, D.
Jacobs, J. D.
Wang, D. H.
Tan, L. -S.
Vaia, R. A.
TI Direct imaging of current paths in multiwalled carbon nanofiber polymer
nanocomposites using conducting-tip atomic force microscopy
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID IN-SITU POLYMERIZATION; NANOTUBES; PERCOLATION; COMPOSITES
AB Using conducting-tip atomic force microscopy (C-AFM), we study the spatial distribution of current paths and local electrical properties in carbon nanofiber/polymer nanocomposites. Previous studies of similar systems were hindered by a polymer-rich skin layer that exists at the nanocomposite surfaces. We present an experimental technique using oxygen plasma etching to controllably remove this polymer skin layer. After this treatment, we can directly probe the microscopic transport characteristics of the nanocomposite using C-AFM. The C-AFM results show that the electrical transport is solely carried by the carbon nanofiber (CNF) networks in the nanocomposites. In addition, high-resolution C-AFM maps show nonuniform distribution of current along the length of some CNFs, suggesting the presence of a heterogeneously distributed adsorbed polymer layer around nanofibers. Finally, two probe conductivity measurements in which one electrode (the C-AFM tip) is contacting a single constituent conducting particle were performed to study local conductivity. Results indicate that Ohmic pathways exist in the conducting network of the nanocomposite to the lowest measured nanofiber concentrations. However, non-Ohmic behavior indicating tunneling transport may also be present, especially near the percolation threshold. c 2008 American Institute of Physics. [DOI: 10.1063/1.3000458]
C1 [Trionfi, A.; Scrymgeour, D. A.; Hsu, J. W. P.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Arlen, M. J.; Tomlin, D.; Jacobs, J. D.; Wang, D. H.; Tan, L. -S.; Vaia, R. A.] USAF, Res Lab, Wright Patterson AFB, OH 45433 USA.
RP Trionfi, A (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM atrionf@sandia.gov
RI Wang, David/F-7492-2013; Scrymgeour, David/C-1981-2008
OI Wang, David/0000-0001-6710-7265;
FU U.S. Department of Energy [DE-AC0494AL85000]
FX This work was performed in part at the U. S. Department of Energy,
Center for Integrated Nanotechnologies, at Los Alamos and Sandia
National Laboratories. Sandia National Laboratories is a multiprogram
laboratory operated by Sandia Corporation, a Lockheed-Martin Co., for
the U. S. Department of Energy under Contract No. DE-AC0494AL85000.
NR 20
TC 21
Z9 21
U1 0
U2 13
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 OCT 15
PY 2008
VL 104
IS 8
AR 083708
DI 10.1063/1.3000458
PG 6
WC Physics, Applied
SC Physics
GA 367SG
UT WOS:000260572100052
ER
PT J
AU Wu, YL
Chen, GD
Ye, HG
Zhu, YZ
Wei, SH
AF Wu, Yelong
Chen, Guangde
Ye, Honggang
Zhu, Youzhang
Wei, Su-Huai
TI Structural and electronic properties of [0001] AIN nanowires: A
first-principles study
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; BAND PARAMETERS; ALN
NANOWIRES; SEMICONDUCTORS
AB Using first- principles methods, we investigated the atomic relaxations, electronic structure, and formation energies of nonpassivated A1N nanowires along [0001] directions. We find that all the nanowires prefer to have (101 (1) over bar0) lateral facets and all the wires with (10 (1) over bar0) lateral facets are semiconductors with a direct band gap. However, surface states that arise from the facet atoms exist inside the bulklike band gap, which can have a large effect on the optoelectronic properties of the nanowires. Our calculated formation energies of the nanowires show that there is a sublinear relationship between the formation energy and surface- to- volume ratio, indicating that the surface effect is localized and becomes more important for small nanowires. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3003528]
C1 [Wu, Yelong; Chen, Guangde; Ye, Honggang; Zhu, Youzhang] Xian Jiaotong Univ, Dept Appl Phys, Xian 710049, Peoples R China.
[Wei, Su-Huai] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Wu, YL (reprint author), Xian Jiaotong Univ, Dept Appl Phys, Xian 710049, Peoples R China.
EM wuyelong520@gmail.com
RI Ye, Honggang/A-8035-2008; Wu, Yelong/G-1100-2010; Chen,
Guangde/D-4373-2011; chen, guangde/I-4260-2014
OI Ye, Honggang/0000-0002-5643-5914; Wu, Yelong/0000-0002-4211-911X;
FU China National Natural Science Fund [10474078]; Xi'an Jiaotong
University; U.S. DOE [DE-AC36-99GO10337]
FX We gratefully acknowledge the financial support of China National
Natural Science Fund (Grant No. 10474078) and the computing support of
the "Digital Information Process and Calculation Laboratory" of Xi'an
Jiaotong University. The work at NREL is supported by the U.S. DOE under
Contract No. DE-AC36-99GO10337.
NR 21
TC 15
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U1 1
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 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD OCT 15
PY 2008
VL 104
IS 8
AR 084313
DI 10.1063/1.3003528
PG 4
WC Physics, Applied
SC Physics
GA 367SG
UT WOS:000260572100102
ER
PT J
AU Hossain, A
Bolotnikov, AE
Camarda, GS
Cui, Y
Yang, G
James, RB
AF Hossain, A.
Bolotnikov, A. E.
Camarda, G. S.
Cui, Y.
Yang, G.
James, R. B.
TI Defects in cadmium zinc telluride crystals revealed by etch-pit
distributions
SO JOURNAL OF CRYSTAL GROWTH
LA English
DT Article
DE Etching; Line defects; Semiconducting II-VI materials; Infrared devices
ID SEMICONDUCTOR COMPOUND-CRYSTALS; CDTE CRYSTALS; DETECTOR APPLICATIONS;
CDZNTE CRYSTALS; GROWTH; DISLOCATIONS
AB We demonstrated the distribution of defects in cadmium zinc telluride (CZT) detectors by revealing etch pits on the surfaces with a chemical-etching method and Te inclusions in the bulk of the crystals. The dislocation networks observed from etch pits on the crystals' surfaces were traced down within the bulk by removing the material layer by layer, followed by sequential Nakagawa etching. We also identified the etch pits corresponding to Te inclusions, and correlated them with grain boundaries and dislocation lines. Published by Elsevier B.V.
C1 [Hossain, A.; Bolotnikov, A. E.; Camarda, G. S.; Cui, Y.; Yang, G.; James, R. B.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Hossain, A (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM hossain@bnl.gov
RI Yang, Ge/G-1354-2011
FU US Department of Energy, Office of Nonproliferation Research and
Development, NA-22 [DE-AC02-98CH1-886]
FX This work was supported by the US Department of Energy, Office of
Nonproliferation Research and Development, NA-22. The manuscript has
been authored by Brookhaven Science Associates, LLC under Contract no.
DE-AC02-98CH1-886 with the US Department of Energy. The United States
Government retains, and the publisher, by accepting the article for
publication, acknowledges, a world-wide license to publish or reproduce
the published form of this manuscript, or allow others to do so, for the
United States Government purposes.
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U1 1
U2 14
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 OCT 15
PY 2008
VL 310
IS 21
BP 4493
EP 4498
DI 10.1016/j.jcrysgro.2008.07.088
PG 6
WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied
SC Crystallography; Materials Science; Physics
GA 373RB
UT WOS:000260988600001
ER
PT J
AU Sen, S
Joshi, S
Aitken, BG
Khalid, S
AF Sen, S.
Joshi, S.
Aitken, B. G.
Khalid, S.
TI Atomic structure and chemical order in binary Ge-Te and As-Te glasses: A
Te K-edge X-ray absorption fine structure spectroscopic study
SO JOURNAL OF NON-CRYSTALLINE SOLIDS
LA English
DT Article
DE Chalcogenides; Medium-range order; Short-range order; X-ray absorption
AB The nearest-neighbor coordination environments of Te atoms in GexTe100-x glasses with x = 15 and 20 and in AsxTe100-x glasses with 40 <= x <= 65 have been studied with Te K-edge EXAFS spectroscopy. The average coordination number of Te atoms in all glasses is found to be similar to 2.0 and no violation of the 8-N rule is observed. The compositional makeup of the first coordination shell of Te atoms indicates that chemical order is largely preserved in both glass-forming binary systems. Sudden changes in the Te coordination environment and violation of chemical order are observed at the stoichiometric As40Te60 glass implying formation of a constrained network. The compositional dependence of the physical properties in both systems can be correlated to short-range chemical order. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Sen, S.; Joshi, S.] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
[Aitken, B. G.] Corning Inc, Glass Res Div, Corning, NY 14831 USA.
[Khalid, S.] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
RP Sen, S (reprint author), Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
EM sbsen@ucdavis.edu
FU National Science Foundation [DMR-0603933]; US Department of Energy;
Division of Materials Sciences and Division of Chemical Sciences
FX This work was supported by the National Science Foundation under Grant
No. DMR-0603933. The National Synchrotron Light Source is supported by
the US Department of Energy, Division of Materials Sciences and Division
of Chemical Sciences. The authors wish to thank S.C. Currie for sample
preparation.
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U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3093
J9 J NON-CRYST SOLIDS
JI J. Non-Cryst. Solids
PD OCT 15
PY 2008
VL 354
IS 40-41
BP 4620
EP 4625
DI 10.1016/j.jnoncrysol.2008.05.048
PG 6
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA 362YH
UT WOS:000260232600017
ER
PT J
AU Kerr, M
Daymond, MR
Holt, RA
Almer, JD
AF Kerr, M.
Daymond, M. R.
Holt, R. A.
Almer, J. D.
TI Strain evolution of zirconium hydride embedded in a Zircaloy-2 matrix
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID FRACTURE INITIATION; EMBRITTLEMENT; DEFORMATION; ALLOYS
AB In situ synchrotron X-ray diffraction has been used to determine strain evolution in a minority phase, zirconium hydride, embedded in Zircaloy-2 (<100 wt ppm average hydrogen content). The elastic modulus of the hydride is similar to that of Zircaloy-2. Three regimes are observed: I - elastic, II - post-yield load transfer from Zircaloy-2 to hydride, and III - strain saturation, possibly due to hydride fracture. The interpretation is supported by finite element calculations and scanning electron microscopy of the fracture surface. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Kerr, M.; Daymond, M. R.; Holt, R. A.] Queens Univ, Dept Mech & Mat Engn, Kingston, ON K7L 3N6, Canada.
[Almer, J. D.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Daymond, MR (reprint author), Queens Univ, Dept Mech & Mat Engn, Kingston, ON K7L 3N6, Canada.
EM daymond@me.queensu.ca
OI Daymond, Mark/0000-0001-6242-7489
FU NSERC; COG; OPG; Nu-Tech Precision Metals; US Department of Energy,
Office of Science, Office of Basic Energy Sciences [DE-Ac02-06CH11357]
FX Work supported by NSERC, COG, OPG and Nu-Tech Precision Metals under the
Industrial Research Chair Program in Nuclear Materials at Queen's
University. Use of the Advanced Photon Source was supported by the US
Department of Energy, Office of Science, Office of Basic Energy
Sciences, under Contract DE-Ac02-06CH11357. The authors would like to
thank AECL Chalk River Labs for assistance with sample hydriding and
metallography. M. Kerr would like to thank his colleague Feng Xu for
useful discussions (data set comparisons and modeling).
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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 OCT 15
PY 2008
VL 380
IS 1-3
BP 70
EP 75
DI 10.1016/j.jnucmat.2008.07.004
PG 6
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 369LD
UT WOS:000260695100007
ER
PT J
AU Kercher, AK
Hunn, JD
Price, JR
Pappano, P
AF Kercher, Andrew K.
Hunn, John D.
Price, Jeffery R.
Pappano, Pete
TI Automated optical microscopy of coated particle fuel
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
AB Fundamental technological advances have occurred during the 20 year hiatus in US research on coated particle nuclear fuel. As part of the recent US Department of Energy's Advanced Gas Reactor Fuel Development and Qualification program, Oak Ridge National Laboratory has utilized advancements in computer automation, digital imaging, and image analysis to modernize US optical microscopy techniques for coated particle nuclear fuel. Automated optical microscopy has enabled detailed and objective analysis of individual particles (hundreds of measurements per particle) and of large sample sizes that far exceed the capabilities of conventional manual microscopy methods (analysis of 1500-5000 particles is common). Demonstrative examples of the capabilities of this automated optical microscopy are given for: (a) shadow imaging of kernels, coated fuel particles, and graphite matrix overcoated particles and (b) cross-sectional analysis of coated fuel particles to determine layer thicknesses. Published by Elsevier B.V.
C1 [Kercher, Andrew K.; Hunn, John D.; Pappano, Pete] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Price, Jeffery R.] Oak Ridge Natl Lab, Engn Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Kercher, AK (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
EM kercherak@ornl.gov
RI Kercher, Andrew/K-1147-2016
OI Kercher, Andrew/0000-0003-1784-5686
FU US-DOE Office of Nuclear Energy, Science; Technology's Advanced Gas
Reactor Fuel Development; Qualification program; Oak Ridge National
Laboratory; UT-Battelle; LLC [DE-ACO5-00OR22725]
FX Research was sponsored by the US-DOE Office of Nuclear Energy, Science,
and Technology's Advanced Gas Reactor Fuel Development and Qualification
program and by the Oak Ridge National Laboratory, managed by
UT-Battelle, LLC for the US Department of Energy under Contract No.
DE-ACO5-00OR22725. All TRISO-coated particles discussed in this work
were produced by Richard A. Lowden. Laboratory work by Ivan Dunbar,
Deniz B. Aykac, and Andy Nelson contributed to the data collection and
mount preparation included in this manuscript. All NUCO and LEUCO
kernels used in this research were produced by Babcock and Wilcox
Company in Lynchburg, Va.
NR 10
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U1 0
U2 0
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 OCT 15
PY 2008
VL 380
IS 1-3
BP 76
EP 84
DI 10.1016/j.jnucmat.2008.07.011
PG 9
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 369LD
UT WOS:000260695100008
ER
PT J
AU Learmonth, T
Glans, PA
McGuinness, C
Plucinski, L
Zhang, Y
Guo, JH
Greenblatt, M
Smith, KE
AF Learmonth, T.
Glans, P-A
McGuinness, C.
Plucinski, L.
Zhang, Y.
Guo, J-H
Greenblatt, M.
Smith, K. E.
TI Electronic structure of the 1D conductor K0.3MoO3 studied using resonant
inelastic X-ray scattering and soft X-ray emission spectroscopy
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID TRANSITION-METAL OXIDES; BAND-STRUCTURE; SOLIDS; PHOTOEMISSION;
ABSORPTION; GRAPHITE; SURFACE; FLUORESCENCE; BRONZES; MOO3
AB The electronic structure of the quasi-one-dimensional conductor K0.3MoO3 has been measured using high resolution resonant inelastic x-ray scattering and x-ray absorption spectroscopy. The results are compared to those for the related two-dimensional insulator alpha-MoO3. Features of the scattering from both oxides are observed and are explained in terms of the band momentum selectivity of the scattering process, allowing a comparison of the scattering data with recent band structure calculations.
C1 [Learmonth, T.; Glans, P-A; Plucinski, L.; Zhang, Y.; Smith, K. E.] Boston Univ, Dept Phys, Boston, MA 02215 USA.
[McGuinness, C.] Univ Dublin Trinity Coll, Sch Phys, Dublin 2, Ireland.
[Guo, J-H] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
[Greenblatt, M.] Rutgers State Univ, Dept Chem & Chem Biol, Piscataway, NJ 08854 USA.
RP Smith, KE (reprint author), Boston Univ, Dept Phys, 590 Commonwealth Ave, Boston, MA 02215 USA.
EM ksmith@bu.edu
RI McGuinness, Cormac/C-6808-2008; Plucinski, Lukasz/J-4987-2013; Glans,
Per-Anders/G-8674-2016
OI McGuinness, Cormac/0000-0002-3095-330X; Plucinski,
Lukasz/0000-0002-6865-7274;
FU Department of Energy [DE-FG02-98ER45680]; US Army Research Office
[DAAD19-01-1-0364, DAAH04-95-0014]; US Department of Energy, Division of
Materials and Chemical Sciences; US Department of Energy
[DE-AC02-05CH11231]; ALS Doctoral Fellowship Program; Irish Higher
Educational Authority and Enterprise Ireland
FX The Boston University (BU) program is supported in part by the
Department of Energy under DE-FG02-98ER45680. The BU XES/RIXS
spectrometer system was funded by the US Army Research Office under
DAAD19-01-1-0364 and DAAH04-95-0014. The experiments at the NSLS are
supported by the US Department of Energy, Division of Materials and
Chemical Sciences. The ALS is supported by the US Department of Energy
under Contract No. DE-AC02-05CH11231. TL acknowledges support from the
ALS Doctoral Fellowship Program. CMcG acknowledges financial support
from the Irish Higher Educational Authority and Enterprise Ireland.
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U1 1
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD OCT 15
PY 2008
VL 20
IS 41
AR 415219
DI 10.1088/0953-8984/20/41/415219
PG 6
WC Physics, Condensed Matter
SC Physics
GA 355EZ
UT WOS:000259693500026
ER
PT J
AU Shao, YY
Kou, R
Wang, J
Viswanathan, VV
Kwak, JH
Liu, J
Wang, Y
Lin, YH
AF Shao, Yuyan
Kou, Rong
Wang, Jun
Viswanathan, Vilayanur V.
Kwak, Ja Hun
Liu, Jun
Wang, Yong
Lin, Yuehe
TI The influence of the electrochemical stressing (potential step and
potential-static holding) on the degradation of polymer electrolyte
membrane fuel cell electrocatalysts
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE PEM fuel cell; Platinum; Electrocatalyst; Accelerated degradation test;
Durability
ID OXYGEN-REDUCTION; CARBON NANOTUBES; PLATINUM NANOPARTICLES;
SUPERCRITICAL-FLUID; CATALYST SUPPORT; LOW-TEMPERATURE; DURABILITY;
PT/C; DISSOLUTION; CORROSION
AB The understanding of the degradation mechanisms of electrocatalysts is very important for developing durable electrocatalysts for polymer electrolyte membrane (PEM) fuel cells. The degradation of Pt/C electrocatalysts under potential-static holding conditions (at 1.2V and 1.4V vs. RHE) and potential step conditions with the upper potential of 1.4V for 150s and lower potential limits (0.85V and 0.60V) for 30s in each period [denoted as Pstep(1.4V_150s-0.85V_30s) and Pstep(1.4V_150s-0.60V_30s), respectively] were investigated. The electrocatalysts and support were characterized with electrochemical voltammetry, transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS). Pt/C degrades much faster under Pstep conditions than that under potential-static holding conditions. Pt/C degrades under the Pstep(1.4V_150s-0.85V30s) condition mainly through the coalescence process of Pt nanoparticles due to the corrosion of carbon support, which is similar to that under the conditions of 1.2V- and 1.4V-potential-static holding; however, Pt/C degrades mainly through the dissolution/loss and dissolution/redeposition process if stressed under Pstep(1.4V_150s-0.60V30s). The difference in the degradation mechanisms is attributed to the chemical states of Pt nanoparticles: Pt dissolution can be alleviated by the protective oxide layer under the Pstep(1.4V_150s-0.85V_30s) condition and the potential-static holding conditions. These findings are very important for understanding PEM fuel cell electrode degradation and are also useful for developing fast test Protocol for screening durable catalyst Support materials. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Shao, Yuyan; Kou, Rong; Wang, Jun; Viswanathan, Vilayanur V.; Kwak, Ja Hun; 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 Shao, Yuyan/A-9911-2008; Lin, Yuehe/D-9762-2011; Wang, Yong/C-2344-2013;
Kwak, Ja Hun/J-4894-2014
OI Shao, Yuyan/0000-0001-5735-2670; Lin, Yuehe/0000-0003-3791-7587;
FU U.S. DOE-EERE Hydrogen Program; Battelle for DOE [DE-AC05-76L01830]
FX This work is supported by the U.S. DOE-EERE Hydrogen Program. The
research described in this paper was performed at the Environmental
Molecular Science Laboratory, a national scientific used 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-AC05-76L01830. Authors
would like to acknowledge Mr. Mark Engelhard for XPS measurement and Dr.
Chongmin Wang for TEM measurement.
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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 OCT 15
PY 2008
VL 185
IS 1
BP 280
EP 286
DI 10.1016/j.jpowsour.2008.07.008
PG 7
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 358HB
UT WOS:000259906600041
ER
PT J
AU Shanahan, PV
Xu, LB
Liang, CD
Waje, M
Dai, S
Yan, YS
AF Shanahan, Paul V.
Xu, Lianbin
Liang, Chengdu
Waje, Mahesh
Dai, Sheng
Yan, Y. S.
TI Graphitic mesoporous carbon as a durable fuel cell catalyst support
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE Catalyst support; Durability; Fuel cell; Graphitic carbon; Mesopores;
Carbon black
ID ELECTROCATALYSTS; DURABILITY
AB Highly stable graphitic mesoporous carbons (GMPCs) are synthesized by heat-treating polymer-templated mesoporous carbon (MPC) at 2600 degrees C. The electrochemical durability of GMPC as Pt catalyst support (Pt/GMPC) is compared with that of carbon black (Pt/XC-72). Comparisons are made using potentiostatic and cyclic voltammetric techniques on the respective specimens under conditions simulating the cathode environment of PEMFC (proton exchange membrane fuel cell). The results indicate that the Pt/GMPC is much more stable than Pt/XC-72, with 96% lower corrosion current. The Pt/GMPC also exhibits a greatly reduced loss of catalytic surface area: 14% for Pt/GMPC vs. 39% for Pt/XC-72. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Liang, Chengdu; Dai, Sheng] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
[Shanahan, Paul V.; Xu, Lianbin; Waje, Mahesh; Yan, Y. S.] Univ Calif Riverside, Dept Chem & Environm Engn, Riverside, CA 92521 USA.
[Xu, Lianbin] Beijing Univ Chem Technol, Key Lab Nanomat, Minist Educ, Beijing 100029, Peoples R China.
RP Dai, S (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM dais@ornl.gov
RI Liang, Chengdu/G-5685-2013; Dai, Sheng/K-8411-2015
OI Dai, Sheng/0000-0002-8046-3931
FU Department of Energy; DOE EERE; Center for Nanophase Materials Sciences;
Division of Scientific User Facilities; U.S. Department of Energy
FX The work at UC was supported by Department of Energy. The work at ORNL
was supported by DOE EERE. A portion of the work was conducted at the
Center for Nanophase Materials Sciences, which is sponsored at ORNL by
the Division of Scientific User Facilities, U.S. Department of Energy.
S.D. would like to thank Dr. Nancy Dudney for the resistivity
measurement of the mesoporous carbons.
NR 17
TC 100
Z9 102
U1 2
U2 33
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 OCT 15
PY 2008
VL 185
IS 1
BP 423
EP 427
DI 10.1016/j.jpowsour.2008.06.041
PG 5
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 358HB
UT WOS:000259906600057
ER
PT J
AU Zhang, XH
Kostorz, G
Liu, CT
Rigsbee, M
Suryanarayana, C
Wang, HY
Zhu, YT
Zhang, DL
AF Zhang, Xinghang
Kostorz, Gernot
Liu, Chain T.
Rigsbee, Mike
Suryanarayana, C.
Wang, Haiyan
Zhu, Yuntian
Zhang, Deliang
TI Mechanical Behavior of Nanostructured Materials, in Honor of Carl Koch
held at TMS 2007, Orlando, Florida Preface
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Editorial Material
C1 [Zhang, Xinghang] Texas A&M Univ, Dept Mech Engn Mat Sci, College Stn, TX 77843 USA.
[Kostorz, Gernot] Swiss Fed Inst Technol, Zurich, Switzerland.
[Liu, Chain T.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
[Rigsbee, Mike; Zhu, Yuntian] N Carolina State Univ, Raleigh, NC 27695 USA.
[Suryanarayana, C.] Univ Cent Florida, Orlando, FL 32816 USA.
[Zhang, Deliang] Univ Waikato, Hamilton, New Zealand.
RP Zhang, XH (reprint author), Texas A&M Univ, Dept Mech Engn Mat Sci, College Stn, TX 77843 USA.
EM zhangx@tamu.edu
RI kostorz, gernot/B-6489-2009; Wang, Haiyan/P-3550-2014
OI Wang, Haiyan/0000-0002-7397-1209
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD OCT 15
PY 2008
VL 493
IS 1-2
SI SI
BP 1
EP 2
DI 10.1016/j.msea.2008.01.019
PG 2
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 357KN
UT WOS:000259844800001
ER
PT J
AU Withey, E
Jin, M
Minor, A
Kuramoto, S
Chrzan, DC
Morris, JW
AF Withey, E.
Jin, M.
Minor, A.
Kuramoto, S.
Chrzan, D. C.
Morris, J. W., Jr.
TI The deformation of "Gum Metal" in nanoindentation
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article; Proceedings Paper
CT Symposium on Mechanical Behavior of Nanostructured Materials held TMS
2007 Annual Meeting
CY FEB 26-MAR 01, 2007
CL Orlando, FL
SP TSM
DE Gum Metal; nanoindentation
ID PLASTIC-DEFORMATION
AB "Gum Metal" describes a newly developed set of alloys with nominal composition Ti-24(Nb + V + Ta)-(ZrHf)-O. In the cold-worked condition these alloys have exceptional elastic elongation and high-strength; the available evidence suggests that they do not yield until the applied stress approaches the ideal strength of the alloy, and then deform by mechanisms that do not involve conventional crystal dislocations. The present paper reports research on the nanoindentation of this material in both the cold-worked and annealed conditions. Nanoindentation tests were conducted in situ in a transmission electron microscope (TEM) stage that allows the deformation process to be observed in real time, and ex situ in a Hysitron nanoindenter, with samples subsequently extracted for high-resolution TEM study. The results reveal unusual deformation patterns beneath the nanoindenter that are, to our knowledge, unique to this material. In the cold-worked alloy deformation is confined to the immediate neighborhood of the indentation, with no evidence of dislocation, twin or fault propagation into the bulk. The deformed volume is highly inhomogeneous; the deformation is accomplished by a series of incremental rotations that are ordinarily resolved into discrete nanodomains. The annealed material deforms in a similar way within the nanoindentation pit, but dislocations emanate from the pit boundary. These are pinned by microstructural barriers only a few nanometers apart, a condition that recent theory suggests is necessary for the material to achieve ideal strength. (c) 2007 Elsevier B.V. All rights reserved.
C1 [Withey, E.; Jin, M.; Chrzan, D. C.; Morris, J. W., Jr.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
[Minor, A.] Lawrence Berkeley Natl Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
[Kuramoto, S.] Toyota Cent Res & Dev Labs Inc, Aichi 4801192, Japan.
RP Morris, JW (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, 210 Hearst Mem Min Bldg, Berkeley, CA 94720 USA.
EM jwmorris@berkeley.edu
NR 13
TC 50
Z9 51
U1 3
U2 31
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD OCT 15
PY 2008
VL 493
IS 1-2
SI SI
BP 26
EP 32
DI 10.1016/j.msea.2007.07.097
PG 7
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 357KN
UT WOS:000259844800005
ER
PT J
AU Desai, TG
Millett, P
Wolf, D
AF Desai, T. G.
Millett, P.
Wolf, D.
TI Is diffusion creep the cause for the inverse Hall-Petch effect in
nanocrystalline materials?
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article; Proceedings Paper
CT Symposium on Mechanical Behavior of Nanostructured Materials held TMS
2007 Annual Meeting
CY FEB 26-MAR 01, 2007
CL Orlando, FL
SP TSM
DE inverse Hall-Petch; diffusion creep; coble creep; nanocrystalline;
molecular dynamics
ID MOLECULAR-DYNAMICS SIMULATION; LOW-TEMPERATURE; METALS; DEFORMATION;
BEHAVIOR
AB It has previously been demonstrated by means of molecular-dynamics (MD) simulation that for the very smallest grain sizes (typically below 20-30 nm), nanocrystalline f.c.c. metals deform via grain-boundary diffusion creep, provided the applied stress is low enough to avoid microcracking and dislocation nucleation from the grain boundaries. Experimentally, however, the nature of the deformation process in this "inverse Hall-Petch" regime (in which the yield stress decreases with decreasing grain size) remains controversial. Here we illustrate by MD simulation that in the absence of grain growth a nanocrystalline model b.c.c. metal, Mo, and a model metal oxide, UO(2), also deform via diffusion creep. However, in the case of Mo both grain-boundary and lattice diffusion are observed to contribute to the creep rate; i.e., the deformation mechanism involves a combination of Coble and Nabarro-Herring creep. While our results on Mo and UO(2) are still preliminary, they lend further support to the observation of diffusion creep previously documented in f.c.c. metals and in covalently bonded Si. (c) 2007 Elsevier B.V. All rights reserved.
C1 [Desai, T. G.; Millett, P.; Wolf, D.] Idaho Natl Lab, Ctr Adv Modeling & Simulat, Idaho Falls, ID 83415 USA.
RP Desai, TG (reprint author), Idaho Natl Lab, Ctr Adv Modeling & Simulat, 2151 N Blvd,POB 1625, Idaho Falls, ID 83415 USA.
EM tapan.desai@inl.gov
NR 32
TC 14
Z9 14
U1 0
U2 15
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD OCT 15
PY 2008
VL 493
IS 1-2
BP 41
EP 47
DI 10.1016/j.msea.2007.06.097
PG 7
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 357KN
UT WOS:000259844800007
ER
PT J
AU Zhao, YH
Liao, XZ
Horita, Z
Langdon, TG
Zhu, YT
AF Zhao, Y. H.
Liao, X. Z.
Horita, Z.
Langdon, T. G.
Zhu, Y. T.
TI Determining the optimal stacking fault energy for achieving high
ductility in ultrafine-grained Cu-Zn alloys
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article; Proceedings Paper
CT Symposium on Mechanical Behavior of Nanostructured Materials held TMS
2007 Annual Meeting
CY FEB 26-MAR 01, 2007
CL Orlando, FL
SP TSM
DE copper alloys; ductility; high-pressure torsion; severe plastic
deformation; stacking fault energy
ID SEVERE PLASTIC-DEFORMATION; HIGH-PRESSURE TORSION; CENTERED-CUBIC
METALS; MICROSTRUCTURAL EVOLUTION; NANOCRYSTALLINE AL;
ULTRAHIGH-STRENGTH; COPPER; ALUMINUM; NANOSTRUCTURES; TEMPERATURE
AB Bulk ultrafine-grained (UFG) materials produced by severe plastic deformation (SPD) often have low ductility. A previous study demonstrated the possibility of lowering the stacking fault energy to simultaneously increase the strength and ductility. This paper demonstrates, there exists an optimal stacking fault energy for the best ductility in UFG Cu-Zn alloys processed by the same SPD processing. When the stacking fault energy is too low, the grain size lies below 15 run after SPD processing and the stacking faults are saturated so that it is difficult to accumulate dislocations and deformation twins during the subsequent tensile testing. These results provide significant guidance for the future design of UFG and nanocrystalline alloys for achieving high ductilities. (c) 2007 Elsevier B.V. All rights reserved.
C1 [Zhao, Y. H.; Zhu, Y. T.] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA.
[Liao, X. Z.] Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia.
[Horita, Z.] Kyushu Univ, Fac Engn, Dept Mat Sci & Engn, Fukuoka 8190395, Japan.
[Langdon, T. G.] Univ So Calif, Dept Aerosp & Mech Engn & Mat Sci, Los Angeles, CA 90089 USA.
[Langdon, T. G.] Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA.
RP Zhu, YT (reprint author), N Carolina State Univ, Dept Mat Sci & Engn, 1009 Capabil Dr, Raleigh, NC 27695 USA.
EM ytzhu@ncsu.edu
RI Langdon, Terence/B-1487-2008; Zhu, Yuntian/B-3021-2008; Zhao,
Yonghao/A-8521-2009; Liao, Xiaozhou/B-3168-2009; Lujan Center,
LANL/G-4896-2012; U-ID, Kyushu/C-5291-2016
OI Zhu, Yuntian/0000-0002-5961-7422; Liao, Xiaozhou/0000-0001-8565-1758;
NR 39
TC 85
Z9 88
U1 7
U2 39
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 OCT 15
PY 2008
VL 493
IS 1-2
SI SI
BP 123
EP 129
DI 10.1016/j.msea.2007.11.074
PG 7
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 357KN
UT WOS:000259844800021
ER
PT J
AU Cheng, S
Milligan, WW
Wang, XL
Choo, H
Liaw, PK
AF Cheng, S.
Milligan, W. W.
Wang, X-L.
Choo, H.
Liaw, P. K.
TI Compressive and tensile deformation behavior of consolidated Fe
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article; Proceedings Paper
CT Symposium on Mechanical Behavior of Nanostructured Materials held TMS
2007 Annual Meeting
CY FEB 26-MAR 01, 2007
CL Orlando, FL
SP TSM
DE ultrafine-grained Fe; compression; tension; shear banding; Luders
banding
ID BULK-METALLIC-GLASS; SENSITIVE PLASTIC MATERIALS; MECHANICAL-BEHAVIOR;
SHEAR BANDS; NANOCRYSTALLINE; FAILURE; IRON; CU; STRENGTH; COPPER
AB The deformation behavior was investigated in a consolidated Fe with a grain size ranging from submicrometer to tens of micrometer values under uniaxial compression and tension. In compression, shear banding occurred significantly at grain sizes >500 nm while only a single band was observed in samples with grain sizes of similar to 100 nm. For the samples with grain sizes similar to 800 nm, the shear banding happened at an angle of 45 degrees (in the maximum shear-stress plane). In tension, premature fracture happened in samples with grain sizes <1 mu m while shear banding was observed at grain sizes >1 mu m, and the shear banding angle was also close to 45 degrees. For the samples with grain sizes >2 mu m, homogeneous deformation took over in compression with a yield-point phenomenon being observed, but Luders banding localization occurred in tension. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Cheng, S.; Choo, H.; Liaw, P. K.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Milligan, W. W.] Michigan Technol Univ, Dept Mat Sci & Engn, Houghton, MI 49931 USA.
[Cheng, S.; Wang, X-L.] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
[Choo, H.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RP Cheng, S (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
EM scheng1@utk.edu
RI Wang, Xun-Li/C-9636-2010; Cheng, Sheng/D-9153-2013; Choo,
Hahn/A-5494-2009
OI Wang, Xun-Li/0000-0003-4060-8777; Cheng, Sheng/0000-0003-1137-1926;
Choo, Hahn/0000-0002-8006-8907
NR 24
TC 12
Z9 12
U1 2
U2 9
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD OCT 15
PY 2008
VL 493
IS 1-2
SI SI
BP 226
EP 231
DI 10.1016/j.msea.2007.08.088
PG 6
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 357KN
UT WOS:000259844800036
ER
PT J
AU Thomson, KE
Jiang, D
Lemberg, JA
Koester, KJ
Ritchie, RO
Mukherjee, AK
AF Thomson, Katherine E.
Jiang, Dongtao
Lemberg, Joseph A.
Koester, Kurt J.
Ritchie, Robert O.
Mukherjee, Amiya K.
TI In situ bend testing of niobium-reinforced alumina nanocomposites with
and without single-walled carbon nanotubes
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article; Proceedings Paper
CT Symposium on Mechanical Behavior of Nanostructured Materials held TMS
2007 Annual Meeting
CY FEB 26-MAR 01, 2007
CL Orlando, FL
SP TSM
DE spark plasma sintering (SPS); Al2O3; Nb; nanocomposites; carbon
nanotubes; fracture toughness
ID MATRIX NANOCOMPOSITES; COMPOSITES
AB Alumina-based nanocomposites were fabricated and consolidated via spark plasma sintering. The effect of single-walled carbon nanotube (SWCNT) and niobium additions to nanocrystalline alumina was examined by in situ bend testing. The addition of 10 vol.% niobium to nanocrystalline alumina provided substantial improvement of fracture toughness (6.1 MPa m(1/2))-almost three times that of nanocrystalline alumina. Observation of cracks emanating from Vickers indents, as well as bend specimen fracture surfaces, reveal the operation of ductile phase toughening in the Nb-Al2O3 nanocomposites. Further addition of 5 vol.% SWCNTs to the 10 vol.%Nb-Al2O3 revealed a more porous structure and less impressive fracture toughness-having an indentation and bend fracture toughness of 2.9 MPa m(1/2) and 3.3 MPa m(1/2), respectively. Published by Elsevier B.V.
C1 [Thomson, Katherine E.; Jiang, Dongtao; Mukherjee, Amiya K.] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
[Lemberg, Joseph A.; Koester, Kurt J.; Ritchie, Robert O.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
[Lemberg, Joseph A.; Koester, Kurt J.; Ritchie, Robert O.] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
RP Mukherjee, AK (reprint author), Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
EM akmukherjee@ucdavis.edu
RI Ritchie, Robert/A-8066-2008
OI Ritchie, Robert/0000-0002-0501-6998
NR 15
TC 5
Z9 5
U1 1
U2 9
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD OCT 15
PY 2008
VL 493
IS 1-2
SI SI
BP 256
EP 260
DI 10.1016/j.msea.2007.05.123
PG 5
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 357KN
UT WOS:000259844800042
ER
PT J
AU Xiong, YH
Smugeresky, JE
Ajdelsztajn, L
Schoenung, JA
AF Xiong, Yuhong
Smugeresky, John E.
Ajdelsztajn, Leonardo
Schoenung, Julie A.
TI Fabrication of WC-Co cermets by laser engineered net shaping
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article; Proceedings Paper
CT Symposium on Mechanical Behavior of Nanostructured Materials held TMS
2007 Annual Meeting
CY FEB 26-MAR 01, 2007
CL Orlando, FL
SP TSM
DE WC-Co; laser engineered net shaping; microstructure; hardness
ID DIRECT METAL-DEPOSITION; POWDER; CONSOLIDATION; COMPOSITES; LENS
AB The Laser Engineered Net Shaping (LENS(R)) technology is an extension of rapid prototyping technologies into the direct fabrication of metal parts. Bulk dense tungsten carbide-cobalt (WC-Co) cermets were produced without any molds using the LENS(R) technology, starting from granules consisting of nanostructured WC crystallites in a Co matrix. Thermal behavior of the LENS(R) process, shape change and coarsening of WC crystallites were investigated in this work to study the mechanisms of microstructural evolution of the cermets. Microstructures with alternating layers were observed, which is relevant to the thermal behavior of the LENS(R) process. Variations in hardness result from the change in cooling rate along the specimen height. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Xiong, Yuhong; Ajdelsztajn, Leonardo; Schoenung, Julie A.] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
[Smugeresky, John E.] Sandia Natl Labs, Livermore, CA 94551 USA.
RP Schoenung, JA (reprint author), Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
EM jmschoenung@ucdavis.edu
NR 24
TC 24
Z9 24
U1 3
U2 15
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD OCT 15
PY 2008
VL 493
IS 1-2
SI SI
BP 261
EP 266
DI 10.1016/j.msea.2007.05.125
PG 6
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 357KN
UT WOS:000259844800043
ER
PT J
AU Mara, NA
Misra, A
Hoagland, RG
Sergueeva, AV
Tamayo, T
Dickerson, P
Mukherjee, AK
AF Mara, N. A.
Misra, A.
Hoagland, R. G.
Sergueeva, A. V.
Tamayo, T.
Dickerson, P.
Mukherjee, A. K.
TI High-temperature mechanical behavior/microstructure correlation of Cu/Nb
nanoscale multilayers
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article; Proceedings Paper
CT Symposium on Mechanical Behavior of Nanostructured Materials held TMS
2007 Annual Meeting
CY FEB 26-MAR 01, 2007
CL Orlando, FL
SP TSM
DE nanocomposite; tension test; multilayers; high-temperature deformation
ID DEFORMATION MECHANISMS; THIN-FILMS; COMPOSITES; INTERFACES; BEHAVIOR;
SUPERPLASTICITY; STRESSES; SLIP
AB Freestanding Cu/Nb multilayers with 60 nm layer thickness were tested in tension at temperatures ranging from 20 degrees C to 700 degrees C at strain rates on the order of 1 x 10(-4) s(-1). At room temperature, the composite exhibited high strength (1.2 GPa) and 5% plastic strain to failure, while at the upper temperature regions tested (700 degrees C); the composite underwent elongation to 0.3 true strain at a flow stress of 200 MPa. At all temperatures tested, tensile strength of the composite exceeded the rule-of-mixtures estimate by up to an order of magnitude. Additionally, post-mortem cross-sectional transmission electron microscopy analysis of samples taken from both the deformed gage and undeformed shoulder regions show retention of the initial layered morphology. Strengthening mechanisms are discussed in terms of the confined layer slip model, with the trend of decreased strength and increased ductility with increasing temperature attributed to enhanced cross slip and climb of dislocations across interlayer boundaries. (C) 2008 Published by Elsevier B.V.
C1 [Mara, N. A.; Misra, A.] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA.
[Hoagland, R. G.] Los Alamos Natl Lab, Struct Property Relat Grp, Los Alamos, NM 87545 USA.
[Sergueeva, A. V.; Tamayo, T.; Mukherjee, A. K.] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
[Dickerson, P.] Los Alamos Natl Lab, Mat Sci Met Grp, Los Alamos, NM 87545 USA.
RP Mara, NA (reprint author), Los Alamos Natl Lab, Ctr Integrated Nanotechnol, MS G756, Los Alamos, NM 87545 USA.
EM namara@lanl.gov
RI Hoagland, Richard/G-9821-2012; Misra, Amit/H-1087-2012; Mara,
Nathan/J-4509-2014;
OI Mara, Nathan/0000-0002-9135-4693
NR 21
TC 30
Z9 32
U1 0
U2 15
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 OCT 15
PY 2008
VL 493
IS 1-2
SI SI
BP 274
EP 282
DI 10.1016/j.msea.2007.08.089
PG 9
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 357KN
UT WOS:000259844800045
ER
PT J
AU Fu, EG
Li, N
Misra, A
Hoagland, RG
Wang, H
Zhang, X
AF Fu, E. G.
Li, Nan
Misra, A.
Hoagland, R. G.
Wang, H.
Zhang, X.
TI Mechanical properties of sputtered Cu/V and Al/Nb multilayer films
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article; Proceedings Paper
CT Symposium on Mechanical Behavior of Nanostructured Materials held TMS
2007 Annual Meeting
CY FEB 26-MAR 01, 2007
CL Orlando, FL
SP TSM
DE metallic multilayers; hardness
ID DISLOCATION PILE-UPS; METALLIC MULTILAYERS; STRENGTH; COMPOSITES;
DEFORMATION; ENHANCEMENT; INTERFACES; FRACTURE; DESIGN; SCALE
AB We have investigated the microstructure and mechanical properties of sputter-deposited Cu/V and Al/Nb metallic multilayer systems in this study and compared their mechanical properties to Cu/Cr and Cu/Nb reported earlier. These multilayer films are all of fcc/bcc type, with Kurdjumov-Sachs orientation relationship: {111}fcc//{110}bcc; < 110 > fcc//< 111 > bcc. In all cases, hardnesses of multilayers increase with decreasing layer thickness, and reach maxima at approximately 2-5 nm layer thickness. The differences in their mechanical properties (the Hall-Petch slope and peak hardness) are interpreted in terms of their differences in shear moduli, heat of mixing, and characteristics of interfaces. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Fu, E. G.; Li, Nan; Zhang, X.] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA.
[Misra, A.] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA.
[Hoagland, R. G.] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 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, College Stn, TX 77843 USA.
EM fuengang@tamu.edu; zhangx@tamu.edu
RI Li, Nan /F-8459-2010; Misra, Amit/H-1087-2012; Hoagland,
Richard/G-9821-2012; Zhang, Xinghang/H-6764-2013; Wang,
Haiyan/P-3550-2014
OI Li, Nan /0000-0002-8248-9027; Zhang, Xinghang/0000-0002-8380-8667; Wang,
Haiyan/0000-0002-7397-1209
NR 30
TC 65
Z9 69
U1 2
U2 44
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD OCT 15
PY 2008
VL 493
IS 1-2
SI SI
BP 283
EP 287
DI 10.1016/j.msea.2007.07.101
PG 5
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 357KN
UT WOS:000259844800046
ER
PT J
AU Kennedy, MS
Moody, NR
Adams, DP
Clift, M
Bahr, DF
AF Kennedy, M. S.
Moody, N. R.
Adams, D. P.
Clift, M.
Bahr, D. F.
TI Environmental influence on interface interactions and adhesion of
Au/SiO2
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article; Proceedings Paper
CT Symposium on Mechanical Behavior of Nanostructured Materials held TMS
2007 Annual Meeting
CY FEB 26-MAR 01, 2007
CL Orlando, FL
SP TSM
DE adhesion; humidity; interface; interfacial fracture energy
ID THIN-FILMS; MECHANISMS; FATIGUE
AB The mode I interfacial adhesion energy for as-deposited Au/SiO2 was measured using a stressed overlayer test, and ranged from 0.39 +/- 0.09 J/m(2) for spontaneous blisters to 0.37 +/- 0.17 J/m(2) for indentation-induced blisters. After these films were heated to 100 degrees C and 300 degrees C for I h, the interfacial fracture energies increased, to 0.9 J/m(2) and 9.9 J/m(2), respectively. This was consistent with Au/SiO2 films aged over an 8-year period, which had a mode I interfacial fracture energy between 1.2 J/m(2) and 1.9 J/m(2). The blister delamination was monitored over the course of over a year, and exhibited growth after an initial stabilization period. Subsequent testing of delaminations with controlled humidity reproduced this growth mechanism. Changes in interfacial adhesion energies are discussed in light of changes in interfacial chemistry and the exposure of an interfacial crack tip to humidity. (C) 2007 Elsevier B.V. All rights reserved.
C1 [Kennedy, M. S.; Bahr, D. F.] Washington State Univ, Pullman, WA 99164 USA.
[Moody, N. R.; Clift, M.] Sandia Natl Labs, Livermore, CA USA.
[Adams, D. P.] Sandia Natl Labs, Albuquerque, NM USA.
RP Bahr, DF (reprint author), Washington State Univ, Pullman, WA 99164 USA.
EM dbahr@wsu.edu
RI Bahr, David/A-6521-2012
OI Bahr, David/0000-0003-2893-967X
NR 13
TC 4
Z9 4
U1 0
U2 6
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD OCT 15
PY 2008
VL 493
IS 1-2
SI SI
BP 299
EP 304
DI 10.1016/j.msea.2007.09.081
PG 6
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 357KN
UT WOS:000259844800049
ER
PT J
AU Fowlkes, JD
Fletcher, BL
Retterer, ST
Melechko, AV
Simpson, ML
Doktycz, MJ
AF Fowlkes, J. D.
Fletcher, B. L.
Retterer, S. T.
Melechko, A. V.
Simpson, M. L.
Doktycz, M. J.
TI Size-selectivity and anomalous subdiffusion of nanoparticles through
carbon nanofiber-based membranes
SO NANOTECHNOLOGY
LA English
DT Article
ID CHEMICAL-VAPOR-DEPOSITION; SINGLE-PARTICLE TRACKING; FLUORESCENCE
RECOVERY; NANOTUBE MEMBRANES; MOLECULAR-TRANSPORT; MASS-TRANSPORT;
MONTE-CARLO; IN-VIVO; DIFFUSION; FABRICATION
AB A simulation is presented here that serves the dual functions of generating a nanoporousmembrane replica and executing the Brownian motion of nanoparticles through the virtual membrane. Specifically, the concentration profile of a dilute solution of fluorescent particles in a stochastic and SiO(2)-coated carbon nanofiber (oxCNF), nanoporous membrane was simulated. The quality of the simulated profile was determined by comparing the results with experimental concentration profiles. The experimental concentration profiles were collected adjacent to the oxCNF membrane surface from time-lapse fluorescence microscopy images. The simulation proved ideal as an accurate predictor of particle diffusion-the simulated concentration profile merged with the experimental profiles at the inlet/exit surfaces of the oxCNF membrane. In particular, the oxCNF barrier was found to hinder the transport of 50 and 100 nm particles and transmembrane trajectories were indicative of anomalous subdiffusion; the diffusion coefficient was found to be a function of time and space.
C1 [Fowlkes, J. D.; Retterer, S. T.; Melechko, A. V.; Simpson, M. L.] Oak Ridge Natl Lab, Nanofabricat Res Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37381 USA.
[Fletcher, B. L.; Simpson, M. L.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Fletcher, B. L.; Retterer, S. T.; Doktycz, M. J.] Oak Ridge Natl Lab, Biosci Div, Biol & Nanoscale Syst Grp, Oak Ridge, TN 37381 USA.
RP Fowlkes, JD (reprint author), Oak Ridge Natl Lab, Nanofabricat Res Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37381 USA.
EM fo2@ornl.gov
RI Melechko, Anatoli/B-8820-2008; Retterer, Scott/A-5256-2011; Doktycz,
Mitchel/A-7499-2011; Simpson, Michael/A-8410-2011
OI Retterer, Scott/0000-0001-8534-1979; Doktycz,
Mitchel/0000-0003-4856-8343; Simpson, Michael/0000-0002-3933-3457
FU NIH [EB000657]; US Department of Energy, Office of Basic Energy
Sciences, Division of Scientific User Facilities; US Government
[DE-AC05-00OR22725]
FX This research was supported by NIH Grant EB000657 and a portion of this
research was conducted at the Center for Nanophase Materials Sciences,
which is sponsored by the US Department of Energy, Office of Basic
Energy Sciences, Division of Scientific User Facilities. AVM and MLS
acknowledge support from the US Department of Energy, Office of Basic
Energy Sciences, Materials Sciences and Engineering program.; This
manuscript has been authorized by a contractor of the US Government
under contract DE-AC05-00OR22725. Accordingly, the US Government retains
a nonexclusive, royalty-free license to publish or reproduce the
published form of this contribution, or allow others to do so, for US
Government purposes.
NR 54
TC 9
Z9 9
U1 0
U2 10
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-4484
J9 NANOTECHNOLOGY
JI Nanotechnology
PD OCT 15
PY 2008
VL 19
IS 41
AR 415301
DI 10.1088/0957-4484/19/41/415301
PG 12
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA 344SH
UT WOS:000258947100007
ER
PT J
AU Smith, DA
Fowlkes, JD
Rack, PD
AF Smith, Daryl A.
Fowlkes, Jason D.
Rack, Philip D.
TI Simulating the effects of surface diffusion on electron beam induced
deposition via a three-dimensional Monte Carlo simulation
SO NANOTECHNOLOGY
LA English
DT Article
ID ION-BEAM; REPAIR; GROWTH; RESOLUTION; LITHOGRAPHY; FABRICATION;
MICROSCOPY
AB The effects that adsorbed precursor surface diffusion has on electron beam induced deposition are explored via a three-dimensional Monte Carlo simulation. Initially the growth rate and resolution are compared for a common set of deposition conditions with a variable surface diffusion coefficient ranging from 0 to 1 x 10(-8) cm(2) s(-1). The growth rate and resolution are shown to both be enhanced as the growth changes from a mass transport limited regime to a reaction rate limited regime. The complex interplay between the vertical growth rate, the lateral growth rate, the interaction volume and the adsorbed and diffused precursor species are discussed. A second scenario is also simulated in which only gas diffused from a constant source at the perimeter of the simulation boundary is assumed (no gas phase adsorption). At low diffusion coefficients, the diffusing gas is consumed by secondary and backscattered electrons and experimentally observed ring-like structures are generated. At higher diffusion coefficients, the diffusion length is sufficient for the precursor atoms to diffuse to the center (and up the pillar sidewalls) to generate nanowires.
C1 [Smith, Daryl A.; Rack, Philip D.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Fowlkes, Jason D.; Rack, Philip D.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Rack, PD (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
EM prack@utk.edu
OI Rack, Philip/0000-0002-9964-3254
FU Intel; Microsystems Technology Office of DARPA; Semiconductor Research
Corporation [1281]; Science Alliance at the University of Tennessee; Oak
Ridge National Laboratory by the Division of Scientific User Facilities,
US Department of Energy
FX The authors would like to acknowledge support from Intel (managed by Ted
Liang), the Microsystems Technology Office of DARPA, and the
Semiconductor Research Corporation (grant 1281 managed by Dan Herr). PDR
would also like to acknowledge support from the Joint Directed Research
and Development program sponsored by the Science Alliance at the
University of Tennessee. PDR and JDF would like to acknowledge that a
portion of this work was performed at the Center for Nanophase Materials
Sciences, which is sponsored at Oak Ridge National Laboratory by the
Division of Scientific User Facilities, US Department of Energy.
NR 33
TC 30
Z9 30
U1 2
U2 8
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-4484
J9 NANOTECHNOLOGY
JI Nanotechnology
PD OCT 15
PY 2008
VL 19
IS 41
AR 415704
DI 10.1088/0957-4484/19/41/415704
PG 11
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA 344SH
UT WOS:000258947100021
PM 21832655
ER
PT J
AU Song, SJ
Moon, JH
Lee, TH
Dorris, SE
Balachandran, U
AF Song, S. -J.
Moon, J. -H.
Lee, T. H.
Dorris, S. E.
Balachandran, U.
TI Thickness dependence of hydrogen permeability for Ni-BaCe0.8Y0.2O3-delta
SO SOLID STATE IONICS
LA English
DT Article
DE Ni-BCY; Hydrogen; Separation membrane
ID ELECTRICAL-PROPERTIES; STRONTIUM CERATE; DEFECT STRUCTURE; MEMBRANES;
PERMEATION; SRCE0.95EU0.05O3-DELTA; SEPARATION; STABILITY; GRADIENTS;
MOBILITY
AB The hydrogen separation properties and thickness dependence of the hydrogen flux for Ni-BCY membranes, containing a proton-conductor (BaCe0.8Y0.2O3-alpha, i.e., BCY) and an electron-conductor (Ni metal), were studied as a function of temperature in the thickness range of 0.08-1.16 mm. Feed gas was composed of 3.8% H-2 balanced with He (pH(2)O=0.03 atm) gas and sweep gas contained 100 ppm hydrogen balanced with nitrogen. The hydrogen permeation flux due to ambipolar diffusion dominates over the entire experimental temperature range. but the hydrogen permeation flux through the Ni-metal increases with temperature due to its endothermic hydrogen solubility. The hydrogen flux through the Ni-BCY membranes is inversely proportional to the thickness, indicating that bulk diffusion is the rate limiting step down to a thickness of 80 pm. For thicker (>640 mu m) membranes. the flux decreases monotonically as the temperature increases up to 900 degrees C, whereas the flux for thinner (<200 mu m) membranes increases as temperature increases up to approximate to 750 degrees C and then remains nearly constant as the temperature is further increased. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Song, S. -J.; Moon, J. -H.] Chonnam Natl Univ, Sch Mat Sci & Engn, Kwangju 500757, South Korea.
[Lee, T. H.; Dorris, S. E.; Balachandran, U.] Argonne Natl Lab, Div Energy Syst, Argonne, IL 60439 USA.
RP Song, SJ (reprint author), Chonnam Natl Univ, Sch Mat Sci & Engn, 300 Yongbong Dong, Kwangju 500757, South Korea.
EM song@chonnam.ac.kr
FU U.S. Department of Energy; Office of Fossil Energy; National Energy
Technology Laboratory's Gasification Technologies Program
[W-31-109-Eng-38]
FX This work was supported by the U.S. Department of Energy, Office of
Fossil Energy, National Energy Technology Laboratory's Gasification
Technologies Program, under Contract W-31-109-Eng-38.
NR 17
TC 46
Z9 46
U1 5
U2 24
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 OCT 15
PY 2008
VL 179
IS 33-34
BP 1854
EP 1857
DI 10.1016/j.ssi.2008.05.012
PG 4
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 386GR
UT WOS:000261870800004
ER
PT J
AU Perelson, AS
Ribeiro, RM
AF Perelson, Alan S.
Ribeiro, Ruy M.
TI Estimating drug efficacy and viral dynamic parameters: HIV and HCV
SO STATISTICS IN MEDICINE
LA English
DT Article; Proceedings Paper
CT Workshop on Statistical Methods in HIV/AIDS and its Practical
Applications
CY OCT 10, 2006
CL Bethesda, MD
SP NIAID
DE HIV; hepatitis C; HCV; viral dynamics; parameter estimation
ID HEPATITIS-C VIRUS; IN-VIVO; HIV-1-INFECTED PATIENTS; ANTIRETROVIRAL
THERAPY; VIROLOGICAL RESPONSES; COMBINATION THERAPY; INTERFERON-ALFA;
INFECTED CELL; BASE-LINE; T-CELLS
AB Mathematical models have proven valuable in understanding the in vivo dynamics of human immuno-deficiency virus type l (HIV-1), the virus that causes AIDS, and hepatitis C Virus (HCV), the virus that causes hepatitis C infection. By comparing mathematical models with the data obtained froth patients being treated with antiviral drugs, it has been possible to determine many quantitative features of these infections. The most dramatic finding has been that even though AIDS and hepatitis C are diseases that occur on a timescale of one or more decades, there are very rapid dynamical processes that occur on timescales of hours to days, as well as slower processes that occur on timescales of weeks to months. We show how dynamical modeling and parameter estimation techniques have uncovered these important features of HIV and HCV infection and subsequently impacted the way in which patients are treated with potent antiviral drugs. Published in 2007 by John Wiley & Sons, Ltd.
C1 [Perelson, Alan S.; Ribeiro, Ruy M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Perelson, AS (reprint author), Los Alamos Natl Lab, MS K710,T-10, Los Alamos, NM 87545 USA.
EM asp@lanl.gov
OI Ribeiro, Ruy/0000-0002-3988-8241
FU NCRR NIH HHS [P20-RR18754, RR06555]; NIAID NIH HHS [AI28433]
NR 41
TC 18
Z9 19
U1 0
U2 3
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 0277-6715
J9 STAT MED
JI Stat. Med.
PD OCT 15
PY 2008
VL 27
IS 23
SI SI
BP 4647
EP 4657
DI 10.1002/sim.3116
PG 11
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 353FB
UT WOS:000259550400005
PM 17960579
ER
PT J
AU Henderson, MA
AF Henderson, Michael A.
TI Ethyl radical ejection during photodecomposition of butanone on
TiO2(110)
SO SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 11th International Workshop on Desorption Induced by Electronic
Transitions
CY MAR 11-15, 2007
CL Berlin, GERMANY
SP Max Planck Soc, Univ Oldenburg, Interdisciplinary Ctr Interface Sci
DE Titanium dioxide; Photochemistry; Ketones; Photon stimulated desorption
ID VOLATILE ORGANIC-COMPOUNDS; PHOTOCATALYTIC OXIDATION; GAS-PHASE;
TITANIUM-DIOXIDE; HETEROGENEOUS PHOTOCATALYSIS; CARBOXYLIC-ACIDS;
WATER-VAPOR; TIO2; ACETONE; METHYL
AB The photodecomposition of acetone and butanone were examined on the (110) surface of rutile TiO2 using temperature programmed desorption (TPD) and photon stimulated desorption (PSD). In both cases, photodecomposition was preceded by a required thermal reaction between the adsorbed ketone and coadsorbed oxygen resulting in an adsorbed diolate species. The diolate photodecomposed by ejection of an organic radical from the surface leaving behind a carboxylate species. In the acetone case, only methyl radical PSD was detected and acetate was left on the surface. In the butanone case there was a possibility of either methyl or ethyl radical ejection, with propionate or acetate left behind, respectively. However, only ethyl radical PSD was detected and the species left on the surface (acetate) was the same as in the acetone case. The preference for ethyl radical ejection is linked to the greater stability of the C-CH3 bond in butanone over that of the C-C2H5 bond. Unlike in the acetone case, where the ejected methyl radicals did not participate in thermal chemistry on the TiO2(110) surface after photoactivation of the acetone diolate, ethyl radicals photodesorbing at 100 K from butanone diolate showed preference for dehydrogenation to ethene on the surface through the influence of coadsorbed oxygen. These results reemphasize the mechanistic importance of organic radical production during photooxidation reactions on TiO2 Surface. (C) 2008 Elsevier B.V. All rights reserved.
C1 Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA.
RP Henderson, MA (reprint author), Pacific NW Natl Lab, Inst Interfacial Catalysis, POB 99,MS K8-80, Richland, WA 99352 USA.
EM ma.henderson@pnl.gov
NR 40
TC 25
Z9 25
U1 2
U2 12
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-6028
J9 SURF SCI
JI Surf. Sci.
PD OCT 15
PY 2008
VL 602
IS 20
BP 3188
EP 3193
DI 10.1016/j.susc.2007.06.079
PG 6
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 373KB
UT WOS:000260969400013
ER
PT J
AU Waltman, MJ
Dwivedi, P
Hill, HH
Blanchard, WC
Ewing, RG
AF Waltman, Melanie J.
Dwivedi, Prabha
Hill, Herbert H., Jr.
Blanchard, William C.
Ewing, Robert G.
TI Characterization of a distributed plasma ionization source (DPIS) for
ion mobility spectrometry and mass spectrometry
SO TALANTA
LA English
DT Article
DE Distributed plasma ionization source (DPIS); Atmospheric pressure
ionization; Ion mobility spectrometry; Mass spectrometry; Corona
discharge; Explosives; Drugs
ID DISCHARGE; EXPLOSIVES
AB A recently developed atmospheric pressure ionization source, a distributed plasma ionization source (DPIS), was characterized and compared to commonly used atmospheric pressure ionization sources with both mass spectrometry (MS) and ion mobility spectrometry (IMS). The source consisted of two electrodes of different sizes separated by a thin dielectric. Application of a high RF voltage across the electrodes generated plasma in air yielding both positive and negative ions. These reactant ions subsequently ionized the analyte vapors. The reactant ions generated were similar to those created in a conventional point-to-plane corona discharge ion source. The positive reactant ions generated by the source were mass identified as being solvated protons of general formula (H2O)(n)H+ with (H2O)(2) H+ as the most abundant reactant ion. The negative reactant ions produced were mass identified primarily as CO3-, NO3-, NO2-, O-3(-) and O-2(-) of various relative intensities. The predominant ion and relative ion ratios varied depending upon source construction and supporting gas flow rates. A few compounds including drugs, explosives and amines were selected to evaluate the new ionization source. The source was operated continuously for 3 months and although surface deterioration was observed visually, the source continued to produce ions at a rate similar that of the initial conditions. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Waltman, Melanie J.; Ewing, Robert G.] Pacific NW Natl Lab, Richland, WA 99354 USA.
[Waltman, Melanie J.] New Mexico Inst Min & Technol, Dept Chem, Socorro, NM 87801 USA.
[Dwivedi, Prabha; Hill, Herbert H., Jr.] Washington State Univ, Dept Chem, Pullman, WA 99164 USA.
[Blanchard, William C.] Blanchard & Co Inc, Phoenix, MD 21131 USA.
RP Ewing, RG (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd,POB 999, Richland, WA 99354 USA.
EM robert.ewing@pnl.gov
FU U.S. Department of Energy [DE-AC05-76RL01830]; U.S. Environmental
Protection Agency Awards [X-97031101-0, X-97031102-0]
FX Funding to support this research was provide by: Geo-Centers Inc.,
Aberdeen Proving Ground, MD: New Mexico Institute of Mining and
Technology, Socorro, NM; and under the Laboratory Directed Research and
Development Program at Pacific Northwest National Laboratory, a
multiprogram national laboratory operated by Battelle for the U.S.
Department of Energy under Contract DE-AC05-76RL01830. H.H. Hill and P.
Dwivedi would also like to acknowledge support from the U.S.
Environmental Protection Agency Awards, X-97031101-0 and X-97031102-0.
NR 22
TC 30
Z9 30
U1 1
U2 15
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-9140
J9 TALANTA
JI Talanta
PD OCT 15
PY 2008
VL 77
IS 1
BP 249
EP 255
DI 10.1016/j.talanta.2008.06.014
PG 7
WC Chemistry, Analytical
SC Chemistry
GA 363TR
UT WOS:000260290200038
PM 18804628
ER
PT J
AU van Wijk, JW
Lawrence, JF
Driscoll, NW
AF van Wijk, J. W.
Lawrence, J. F.
Driscoll, N. W.
TI Formation of the Transantarctic Mountains related to extension of the
West Antarctic Rift system
SO TECTONOPHYSICS
LA English
DT Article
DE Continental rift; West Antarctic Rift; Transantarctic Mountains;
Numerical model
ID SOUTHERN VICTORIA LAND; MANTLE-PLUME ACTIVITY; MARIE-BYRD-LAND;
NEW-ZEALAND; GEOPHYSICAL INVESTIGATIONS; SEDIMENTARY BASINS; ROSS
EMBAYMENT; UPLIFT; EAST; TECTONICS
AB The Transantarctic Mountains are a major rift-related mountain belt bisecting the Antarctic continent. The range is located on the tectonic boundary between non-cratonic West and cratonic East Antarctica. Formation of the mountain range and a possible relation with the West Antarctic Rift system are unclear. In this study, we find a new explanation for uplift of the Transantarctic Mountains and suggest a relation between uplift of the range, formation of a small crustal root, depression of the hinterland Wilkes Basin, and the formation of the adjacent West Antarctic Rift system. Numerical models show that upon extension of the Antarctic lithosphere, the West Antarctic Rift system is formed on the tectonic boundary between East and West Antarctica. Convergence of crustal material results in crustal thickening and uplift of the Earth's surface on the cratonic side of this rift zone, and formation of the Transantarctic Mountains. Some models predict a depression in the hinterland of the mountain range at the location of the Wilkes Basin. These models predict that the Wilkes Basin is a non-extensional basin caused by flexure of the lithosphere. This study shows that inherited lithosphere structures play an important role in localization of both extensional and convergent deformation. (C) 2008 Elsevier B.V. All rights reserved.
C1 [van Wijk, J. W.] Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
[Lawrence, J. F.; Driscoll, N. W.] Univ Calif San Diego, Scripps Inst Oceanog, IGPP, La Jolla, CA 92093 USA.
RP van Wijk, JW (reprint author), Los Alamos Natl Lab, Div Earth & Environm Sci, MS D443, Los Alamos, NM 87545 USA.
EM jolante@lanl.gov; jflawrence@stanford.edu; ndriscoll@ucsd.edu
FU [NSF/OCE-0527215]
FX We thank two reviewers for constructive comments. JvW and NWD received
support from NSF/OCE-0527215.
NR 66
TC 11
Z9 11
U1 2
U2 10
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0040-1951
J9 TECTONOPHYSICS
JI Tectonophysics
PD OCT 15
PY 2008
VL 458
IS 1-4
SI SI
BP 117
EP 126
DI 10.1016/j.tecto.2008.03.009
PG 10
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 369PA
UT WOS:000260705200008
ER
PT J
AU Fair, JM
Taylor-McCabe, KJ
Shou, YL
Marrone, BL
AF Fair, Jeanne M.
Taylor-McCabe, Kirsten J.
Shou, Yulin
Marrone, Babetta L.
TI Immunophenotyping of chicken peripheral blood lymphocyte subpopulations:
Individual variability and repeatability
SO VETERINARY IMMUNOLOGY AND IMMUNOPATHOLOGY
LA English
DT Article
DE Chicken; Flow cytometry; Immunophenotyping; Hematology
ID FREE-RANGE CHICKENS; MONOCLONAL-ANTIBODIES; T-CELLS; ENTERITIDIS;
SYSTEMS; SPLEEN
AB T-cell lymphocyte populations can be delineated into subsets based on expression of cell surface proteins that can be measured in peripheral blood by monoclonal antibodies and flow cytometry percentages of the lymphocyte subpopulations. In order to accurately assess immunocompetence in birds, natural variability in both avian immune function and the methodology must be understood. Our objectives were to (1) further develop flow cytometry for estimating subpopulations of lymphocytes in peripheral blood from poultry, (2) estimate repeatability and variability in the methodology with respect to poultry in a free-range and environmentally diverse situation, and (3) estimate the best antibody and cell marker combination for estimating lymphocyte subpopulations. This work demonstrated the repeatability of using flow cytometry for measurements of peripheral blood in chickens using anti-chicken antibodies for lymphocyte subpopulations. Immunofluorescence, staining of cells isolated from peripheral blood revealed that the CD3(+) antibodies reacted with an average of approximately 12-24% of the lymphoid cells in the blood, depending on the fluorescence type. The CD4(+) and CD8(+) molecules were expressed in a range of 4-31 % and 1-10% of the lymphoid cells in the blood, respectively. Both fluorescence label and antibody company contribute to the variability of results and should be considered in future flow cytometry studies in poultry. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Fair, Jeanne M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Taylor-McCabe, Kirsten J.; Shou, Yulin; Marrone, Babetta L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Fair, JM (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM jmfair@lan1.gov
FU Laboratory Directed Research and Development Program through Los Alamos
National Security LLC [DE-AC52-06NA25396]; U.S. Department of Energy;
Institutional Animal Care and Use Committee; Institutional Biosafety
Committee
FX We thank the following people for excellence in field and laboratory
assistance: C. Hathcock, D. Keller, B. Pearson, L. Marsh, L. Bare, M.
Nichols, M. Shendo, S. Loftin, T. Haarmann, and A. Thomas. We thank H.
Hinojosa for comments on an earlier draft. This research was funded by
the Laboratory Directed Research and Development Program through Los
Alamos National Security, LLC, operator of the Los Alamos National
Laboratory under contract no. DE-AC52-06NA25396 with the U.S. Department
of Energy. This research was approved by the Institutional Animal Care
and Use Committee and the Institutional Biosafety Committee at Los
Alamos National Laboratory.
NR 16
TC 12
Z9 13
U1 1
U2 11
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0165-2427
J9 VET IMMUNOL IMMUNOP
JI Vet. Immunol. Immunopathol.
PD OCT 15
PY 2008
VL 125
IS 3-4
BP 268
EP 273
DI 10.1016/j.vetimm.2008.05.012
PG 6
WC Immunology; Veterinary Sciences
SC Immunology; Veterinary Sciences
GA 363SD
UT WOS:000260286100007
PM 18602700
ER
PT J
AU Johnson, CS
Li, NC
Lefief, C
Vaughey, JT
Thackeray, MM
AF Johnson, Christopher S.
Li, Naichao
Lefief, Christina
Vaughey, John T.
Thackeray, Michael M.
TI Synthesis, Characterization and Electrochemistry of Lithium Battery
Electrodes: xLi(2)MnO(3)center dot(1-x)LiMn0.333Ni0.333Co0.333O2 (0 <= x
<= 0.7)
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID ION BATTERIES; MANGANESE-OXIDE; POSITIVE ELECTRODE;
STRUCTURAL-CHARACTERIZATION; CATHODE MATERIAL; ANOMALOUS CAPACITY;
MONOCLINIC LI2MNO3; INSERTION MATERIAL; RAY-DIFFRACTION; 1ST PRINCIPLES
AB Lithium- and manganese-rich layered electrode materials, represented by the general formula xLi(2)MnO(3)center dot(1-x)LiMO2 in which M is Mn, Ni, and Co, are of interest for both high-power and high-capacity lithium ion cells. In this paper, the synthesis, structural and electrochemical characterization of xLi(2)MnO(3)center dot(1-x)LiMn0.333Ni0.333Co0.333O2 electrodes over a wide compositional range (0 <= x <= 0.7) is explored. Changes that occur to the compositional, structural, and electrochemical properties of the electrodes as a function of x and the importance of using a relatively high manganese content and a high charging potential (> 4.4 V) to generate high capacity (> 200 mAh/g) electrodes are highlighted. Particular attention is given to the electrode composition 0.3Li(2)MnO(3)center dot 0.7LiMn(0.333)Ni(0.333)Co(0.333)O(2) (x = 0.3) which, if completely delithiated during charge, yields Mn0.533Ni0.233Co0.233O2, in which the manganese ions are tetravalent and, when fully discharges, LiMn0.533Ni0.233Co0.233O2 composite electrode structures with 0.1 M HNO3 chemically activates the Li2MnO3 component and essentially eliminates the first cycle capacity loss but damages electrochemical behavior, consistent with earlier reports for Li2MnO3 component are discussed. Electrochemical charge/discharge profiles and cyclic voltammogram data suggest that small spinel-like regions, generated in cycled manganese-rich electrodes, serve to stabilize the electrodes, particularly at low lithium loadings (high potentials). The study emphasizes that, for high values of x, a relatively small LiMO2 concentration stabilizes a layered Li2MnO3 electrode to reversible lithium insertion and extraction when charged to a high potential.
C1 [Johnson, Christopher S.; Li, Naichao; Lefief, Christina; Vaughey, John T.; Thackeray, Michael M.] Argonne Natl Lab, Electrochem Engn Storage Dept, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Johnson, CS (reprint author), Argonne Natl Lab, Electrochem Engn Storage Dept, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM cjohnson@anl.gov
FU Office of Vehicle Technologies of the U.S. [DE-AC02-06CH11357]
FX Financial support from the Office of Vehicle Technologies of the U.S.
Department of Energy under Contract DE-AC02-06CH11357 is gratefully
acknowledged.; The submitted manuscript has been created by UChicago
Argonne, LLC, Operator of Argonne National Laboratory ("Argonne").
Argonne, a U.S. Department of Energy Office of Science laboratory, is
operated under Contract No. DE-AC02-06CH11357.
NR 66
TC 410
Z9 431
U1 48
U2 359
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 OCT 14
PY 2008
VL 20
IS 19
BP 6095
EP 6106
DI 10.1021/cm801245r
PG 12
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 357UG
UT WOS:000259871500022
ER
PT J
AU Sieve, B
Gray, DL
Henning, R
Bakas, T
Schultz, AJ
Kanatzidis, MG
AF Sieve, Bradley
Gray, Danielle L.
Henning, Robert
Bakas, Thomas
Schultz, Arthur J.
Kanatzidis, Mercouri G.
TI Al Flux Synthesis of the Oxidation-Resistant Quaternary Phase
REFe4Al9Si6 (RE = Tb, Er)
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID ALUMINUM-MATRIX COMPOSITES; TRANSITION-METAL SILICIDES; LIQUID ALUMINUM;
MOLTEN ALUMINUM; INTERMETALLIC COMPOUNDS; ELECTRICAL-RESISTIVITY;
EXPLORATORY SYNTHESIS; MAGNETIC-PROPERTIES; DUCTILITY BEHAVIOR; AL/SI
DISTRIBUTION
AB Two rare earth iron aluminium silicides, REFe4Al9Si6 (RE = Tb, Er), were synthesized in liquid Al at temperatured below 850 degrees C. They crystallize in the tetragonal space group P4(2)/mnc (no. 137) with cell dimensions of a = 8.718(1) angstrom and c = 15.171(3) angstrom for the Tb analogue. The structure, which is highly intricate and represents a rare structural arrangement, is based on that of NdRh4Al15.4. It can be understood in terms of highly corrugated layers of merged Al-6 rings stacking to form a three-dimensional framework. the Fe and Si atoms are situated in various sites in the framework. The RE atoms have a very high coordination number (20) and sit in remaining pockets formed by the bonding arrangements in the structure. Magnetic measurements show that the rare earth ions are in a 3+ state, whereas Mossbauer measurements show that the Fe atoms do not exhibit a magnetic moment and are more reduced than in elemental Fe. The possible insights gained from these results into the mettallurgical processing of advanced aluminum matrix alloys are discussed. Thermal gravimetric analysis experiments in air show that REFe4Al9Si6 is resistant to oxidation up to 900 degrees C, Which is attributable to an alumina/silica surface scale.
C1 [Gray, Danielle L.; Kanatzidis, Mercouri G.] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
[Sieve, Bradley] No Kentucky Univ, Dept Chem, Highland Hts, KY 41099 USA.
[Henning, Robert; Schultz, Arthur J.] Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA.
[Bakas, Thomas] Univ Ioannina, Dept Phys, GR-45110 Ioannina, Greece.
RP Kanatzidis, MG (reprint author), Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA.
EM m-kanatzidis@northwestern.edu
OI Gray, Danielle/0000-0003-0059-2096
FU Department of Energy [DE-FG02-07ER46356]; U.S. Department of Energy,
Basic Energy Sciences-Materials Sciences [W-31-109-ENG-38]
FX Financial Support from the Department of Energy (Grant
DE-FG02-07ER46356, Northwestern University) is gratefully acknowledged.
The work at Argonne National Laboratory (IPNS) was supported by the U.S.
Department of Energy, Basic Energy Sciences-Materials Sciences. under
Contract No. W-31-109-ENG-38.
NR 48
TC 8
Z9 8
U1 1
U2 6
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 OCT 14
PY 2008
VL 20
IS 19
BP 6107
EP 6115
DI 10.1021/cm801554d
PG 9
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 357UG
UT WOS:000259871500023
ER
PT J
AU Cho, JY
Millican, JN
Capan, C
Sokolov, DA
Moldovan, M
Karki, AB
Young, DP
Aronson, MC
Chan, JY
AF Cho, Juno Young
Millican, Jasmine N.
Capan, Cigdem
Sokolov, Dmitry A.
Moldovan, Monica
Karki, Amar B.
Young, David P.
Aronson, Melgan C.
Chan, Julia Y.
TI Crystal Growth, Structure, and Physical Properties of Ln(2)MGa(12) (Ln =
La, Ce; M = Ni, Cu)
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID HEAVY-FERMION COMPOUNDS; KONDO COMPOUND CECU5; GALLIUM;
SUPERCONDUCTIVITY; MAGNETORESISTANCE; SYSTEMS; METALS; CROSSOVER;
CECU3AL2; GA
AB Single crystals of Ln(2)MGa(12) (Ln = La, Ce; M = Ni, Cu) have been synthesized using Ga flux and their structures determined by single-crystal X-ray diffraction. The Ln(2)MGa(12) (Ln - La, Ce; M = Ni, Cu), which is isostructural to Ce2PdGa12, crystallizes in the tetragonal P4/nbm (no. 125, origin choice 2) space group, with Z = 2 and lattice parameters a approximate to 6.1 angstrom and c approximate to 15.3 angstrom. Ce2NiGa12 orders antiferromagnetically at 10 K and specific heat measurements suggest it is a moderate heavy-fermion system with gamma approximate to 191 mj mol(-1) K-2. Magnetic susceptibility data show paramagnetic behavior down to 2 K for Ce2CuGa12, whereas specific heat data suggest a magnetic transition below 1.8 K, with a moderately enhanced gamma-value of 69 mj mol(-1) K-2. Metallic behavior is observed below 300 K for each compound. A large positive and nonsaturating magnetoresistance up to 216% at a field (mu H-0) of 9 T is also observed for La2NiGa12. We present the crystal structures and physical properties of the Ln(2)MGa(12) (Ln = La, Ce; M = Ni, Cu) series.
C1 [Cho, Juno Young; Millican, Jasmine N.; Chan, Julia Y.] Louisiana State Univ, Dept Chem, Baton Rouge, LA 70803 USA.
[Capan, Cigdem; Moldovan, Monica; Karki, Amar B.; Young, David P.] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
[Millican, Jasmine N.] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA.
[Sokolov, Dmitry A.; Aronson, Melgan C.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Aronson, Melgan C.] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
RP Chan, JY (reprint author), Louisiana State Univ, Dept Chem, Baton Rouge, LA 70803 USA.
EM jchan@lsu.edu
RI Sokolov, D/G-7755-2011; Chan, Julia/C-5392-2008
OI Chan, Julia/0000-0003-4434-2160
FU NSF [DMR0237664)]; Alfred P. Sloan Fellowship; [DMR0449022]
FX Acknowledgment. J.Y.C. acknowledges in NSF-CAREER award (Grant
DMR0237664) and Alfred P. Sloan Fellowship For partial support of this
project. DRY. acknowledges an NSF-CAREER award (Grant DMR0449022). Work
at the Brookhaven National Laboratory Was Carried Out under the auspices
of the U S Department of Energy. We also acknowledge Dr. Frank Fronczek
and Judith K. Stalick for useful discussion. Certain trade names and
Company)I products are identified ill order to specify adequately the
experimental Procedure. In no case does Such identification imply
recommendation or endorsement by the National Institute of Standards and
Technology. nor does it imply that the products are necessarily the best
for the Purpose.
NR 37
TC 16
Z9 16
U1 1
U2 17
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 OCT 14
PY 2008
VL 20
IS 19
BP 6116
EP 6123
DI 10.1021/cm801693t
PG 8
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 357UG
UT WOS:000259871500024
ER
PT J
AU Sakellariou, G
Ji, HN
Mays, JW
Baskaran, D
AF Sakellariou, Georgios
Ji, Haining
Mays, Jimmy W.
Baskaran, Durairaj
TI Enhanced Polymer Grafting from Multiwalled Carbon Nanotubes through
Living Anionic Surface-Initiated Polymerization
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID TRANSFER RADICAL POLYMERIZATION; CHROMATOGRAPHIC PURIFICATION; SIDEWALL
FUNCTIONALIZATION; SINGLE; POLYSTYRENE; COMPOSITES
AB Anionic surface-initiated polymerization of ethylene oxide and styrene has been performed using multiwalled carbon nanotubes (MWNTs) functionalized with anionic initiators. The surface of MWNTs was modified via covalent attachment of precursor anions such as 40hydroxyethyl benzocyclobutene (BCB-EO) and 1-benzocyclobutene-1 '-phenylethylene (BCB-PE) through Diels-Alder cycloaddition at 235 degrees C. Surfact-functionalized MWNTs-g-(BCB-EO)(n) and MWNTs-g-(BCB-PE)(n) with 23 and 54 wt % precursor initiators, respectively, were used for the polymerizations. Alkoxide anion on the surface of MWNTs-g-(BCB-EO)(n) was generated through reaction with potassium triphenylmethane for the polymerization of ethylene oxide in tetrahydrofuran and phenyl substituted alkyllithium was generated from the surface of MWNTs-g-(BCB-PE)(n) using sec-butyllithium for the polymerization of styrene in benzene. In both cases, the initiation was found to be very slow because of the heterogeneous reaction medium. However, the MWNTs gradually dispersed in the reaction medium during the polymerization. A pale green color was noticed in the case of ethylene oxide polymerization and the color of initiator as well as the propagating anions was not discernible visually in styrene polymerization. Polymer grafted nanocomposites, MWNTs-g-(BCB-PEO)(n) and MWNTs ( <1 wt % ) were obtained. The conversion of ethylene oxide and the weight percent of PEO on the surface of the MWNTs increased with increasing reaction time indicating a controlled polymerization. The polymer-grafted MWNTs were characterized using FT-IR. H-1 NMR. Raman spectroscopy, differential scanning calorimetry, thermogravimetric analysis, and transmission electron microscopy (TEM). Size exclusion chromatography of the polymer grafted MWNTs revealed broad molecular weight distributions (1.3 < M-w/M-n < 1.8) indicating the presence of different sizes of polymer nanocomposites. The TEM images showed the presence of thick layers of polymer upto 30 nm around the MWNTs. The living nature of the growing polystyryllithium was used to produce diblock copolymer grafts using sequential polymerization of isoprene on the surface of MWNTs.
C1 [Sakellariou, Georgios; Ji, Haining; Mays, Jimmy W.; Baskaran, Durairaj] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
[Mays, Jimmy W.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Baskaran, D (reprint author), Univ Tennessee, Dept Chem, 552 Buehler Hall, Knoxville, TN 37996 USA.
EM baskaran@utk.edu
RI Durairaj, Baskaran/C-3692-2009; Sakellariou, Georgios/B-1752-2014
OI Durairaj, Baskaran/0000-0002-6886-5604;
FU Division of Materials Science and Engineering; Office of Basic Energy
Sciences; U.S. Department of Energy [DE-AC05-00OR22725]
FX This work was sponsored by the Division of Materials Science and
Engineering, 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.
NR 47
TC 35
Z9 35
U1 1
U2 33
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 OCT 14
PY 2008
VL 20
IS 19
BP 6217
EP 6230
DI 10.1021/cm801449t
PG 14
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 357UG
UT WOS:000259871500037
ER
PT J
AU Lowman, JP
Gait, AD
Gable, CW
Kukreja, H
AF Lowman, J. P.
Gait, A. D.
Gable, C. W.
Kukreja, H.
TI Plumes anchored by a high viscosity lower mantle in a 3D mantle
convection model featuring dynamically evolving plates
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID SPHERICAL-SHELL MODELS; TECTONIC PLATES; SURFACE PLATES; FLOW; HOTSPOTS;
MOTION
AB Previous studies have shown that 3D vigorously convecting systems featuring plate-like surface motion and lower mantle viscosities much greater than the upper mantle viscosity can yield long lived intraplate plumes if plate boundaries remain fixed. We investigate whether plumes originating in a lower mantle 90 times more viscous than the upper mantle will maintain relatively fixed positions when dynamic plate evolution is present. We compare the findings from a pair of calculations featuring four plates in a 3 x 3 x 1 periodic Cartesian geometry model. In both calculations, plate velocities are determined dynamically in response to the stresses acting on the viscously defined lithosphere. In one case plate boundaries are held fixed, in the second dynamically determined plate evolution is enabled. In both cases, long lived mantle plumes are observed. Moreover, the locations of the plumes remain relatively fixed even as plates systematically evolve to a completely different arrangement from their initial configuration. Citation: Lowman, J. P., A. D. Gait, C. W. Gable, and H. Kukreja (2008), Plumes anchored by a high viscosity lower mantle in a 3D mantle convection model featuring dynamically evolving plates, Geophys. Res. Lett., 35, L19309, doi: 10.1029/2008GL035342.
C1 [Lowman, J. P.; Kukreja, H.] Univ Toronto Scarborough, Dept Phys & Environm Sci, Toronto, ON M1C 1A4, Canada.
[Gait, A. D.] Univ Manchester, Sch Math, Manchester M13 9PL, Lancs, England.
[Gable, C. W.] Los Alamos Natl Lab, Hydrol Geochem & Geol Grp, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
RP Lowman, JP (reprint author), Univ Toronto Scarborough, Dept Phys & Environm Sci, 1265 Mil Trail, Toronto, ON M1C 1A4, Canada.
EM lowman@utsc.utoronto.ca; andrew.gait@manchester.ac.uk; gable@lanl.gov;
harish.kukreja@utoronto.ca
RI Gable, Carl/B-4689-2011;
OI Gait, Andrew/0000-0001-9349-1096; Gable, Carl/0000-0001-7063-0815
FU NSERC of Canada [327084-06]
FX JPL is grateful to the NSERC of Canada for continued funding in
planetary mantle dynamics (327084-06).
NR 17
TC 6
Z9 6
U1 1
U2 5
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
EI 1944-8007
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD OCT 14
PY 2008
VL 35
IS 19
AR L19309
DI 10.1029/2008GL035342
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 362CX
UT WOS:000260176900005
ER
PT J
AU Bardhan, JP
AF Bardhan, Jaydeep P.
TI Interpreting the Coulomb-field approximation for generalized-Born
electrostatics using boundary-integral equation theory
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Review
ID POISSON-BOLTZMANN EQUATION; IMPLICIT SOLVENT MODELS; MOLECULAR-DYNAMICS
SIMULATIONS; FREE-ENERGY LANDSCAPE; FAST MULTIPOLE ALGORITHM; DEAD-END
ELIMINATION; ELEMENT METHOD; EXPLICIT SOLVENT; MACROMOLECULAR
ELECTROSTATICS; CONTINUUM ELECTROSTATICS
AB The importance of molecular electrostatic interactions in aqueous solution has motivated extensive research into physical models and numerical methods for their estimation. The computational costs associated with simulations that include many explicit water molecules have driven the development of implicit-solvent models, with generalized-Born (GB) models among the most popular of these. In this paper, we analyze a boundary-integral equation interpretation for the Coulomb-field approximation (CFA), which plays a central role in most GB models. This interpretation offers new insights into the nature of the CFA, which traditionally has been assessed using only a single point charge in the solute. The boundary-integral interpretation of the CFA allows the use of multiple point charges, or even continuous charge distributions, leading naturally to methods that eliminate the interpolation inaccuracies associated with the Still equation. This approach, which we call boundary-integral-based electrostatic estimation by the CFA (BIBEE/CFA), is most accurate when the molecular charge distribution generates a smooth normal displacement field at the solute-solvent boundary, and CFA-based GB methods perform similarly. Conversely, both methods are least accurate for charge distributions that give rise to rapidly varying or highly localized normal displacement fields. Supporting this analysis are comparisons of the reaction-potential matrices calculated using GB methods and boundary-element-method (BEM (simulations. An approximation similar to BIBEE/CFA exhibits complementary behavior, with superior accuracy for charge distributions that generate rapidly varying normal fields and poorer accuracy for distributions that produce smooth fields. This approximation, BIBEE by preconditioning (BIBEE/P), essentially generates initial guesses for preconditioned Krylov-subspace iterative BEMs. Thus, iterative refinement of the BIBEE/P results recovers the BEM solution; excellent agreement is obtained in only a few iterations. The boundary-integral-equation framework may also provide a means to derive rigorous results explaining how the empirical correction terms in many modern GB models significantly improve accuracy despite their simple analytical forms. c 2008 American Institute of Physics.
C1 [Bardhan, Jaydeep P.] Argonne Natl Lab, Math & Comp Sci Div, Argonne, IL 60439 USA.
[Bardhan, Jaydeep P.] Rush Univ, Dept Mol Biophys & Physiol, Chicago, IL 60612 USA.
RP Bardhan, JP (reprint author), Argonne Natl Lab, Math & Comp Sci Div, Argonne, IL 60439 USA.
EM jbardhan@alum.mit.edu
FU Mathematical, Information, and Computational Sciences Division; U. S.
Department of Energy [AC02-06CH11357]
FX The author thanks B. Roux for the use of CHARMM and for encouragement,
M. D. Altman for sharing the CDK2-inhibitor and HIV-1 protease-inhibitor
geometries, M. Anitescu, M. K. Gilson, B. Egwolf, and D. F. Green for
valuable discussions, and gratefully acknowledges funding from a
Wilkinson Fellowship in Scientific Computing funded by the Mathematical,
Information, and Computational Sciences Division Subprogram of the
Office of Advanced Scientific Computing Research, Office of Science, U.
S. Department of Energy, under Contract No. DE-AC02-06CH11357. The
author would also like to acknowledge the referees' insightful comments,
which substantially improved the paper, and the support and hospitality
of the Radon Institute for Computational and Applied Mathematics at the
Johannes Kepler Universitat in Linz, Austria, where a portion of this
work was conducted.
NR 122
TC 19
Z9 19
U1 0
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 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD OCT 14
PY 2008
VL 129
IS 14
AR 144105
DI 10.1063/1.2987409
PG 12
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 359ZD
UT WOS:000260025900005
PM 19045132
ER
PT J
AU Han, JX
Tiago, ML
Chan, TL
Chelikowsky, JR
AF Han, Jiaxin
Tiago, Murilo L.
Chan, T. -L.
Chelikowsky, James R.
TI Real space method for the electronic structure of one-dimensional
periodic systems
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID TOTAL-ENERGY; COMPUTATION
AB We present a real space pseudopotential method for calculating the electronic structure of one-dimensional periodic systems such as nanowires. As an application of this method, we examine Hpassivated Si nanowires. The band structure and heat of formation of the Si nanowires are presented and compared to plane wave methods. Our method is able to offer the same accuracy as the traditional plane wave methods but offers a number of computational advantages such as faster convergence for heteropolar nanowires. (C) 2008 American Institute of Physics.
C1 [Han, Jiaxin; Chan, T. -L.; Chelikowsky, James R.] Univ Texas Austin, Inst Computat Engn & Sci, Ctr Computat Mat, Austin, TX 78712 USA.
[Han, Jiaxin; Chelikowsky, James R.] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA.
[Tiago, Murilo L.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
[Chelikowsky, James R.] Univ Texas Austin, Dept Chem Engn, Austin, TX 78712 USA.
RP Chelikowsky, JR (reprint author), Univ Texas Austin, Inst Computat Engn & Sci, Ctr Computat Mat, Austin, TX 78712 USA.
EM jrc@ices.utexas.edu
RI Chan, Tzu-Liang/C-3260-2015
OI Chan, Tzu-Liang/0000-0002-9655-0917
FU National Science Foundation [DMR-0551195]; U. S. Department of Energy
[DE-FG02-06ER46286, DE-FG02-06ER15760]; National Energy Research
Scientific Computing Center (NERSC); Texas Advanced Computing Center
(TACC)
FX This work was supported in part by the National Science Foundation under
Grant No. DMR-0551195 and the U. S. Department of Energy under Grant
Nos. DE-FG02-06ER46286 and DE-FG02-06ER15760. Computational resources
were provided in part by the National Energy Research Scientific
Computing Center (NERSC) and the Texas Advanced Computing Center (TACC).
M. L. T. acknowledges support from the Division of Materials Sciences
and Engineering BES, U. S. DOE. Research at the Oak Ridge National
Laboratory was supported by the U. S. Department of Energy under a
contract with UT-Battelle, LLC.
NR 27
TC 18
Z9 18
U1 0
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD OCT 14
PY 2008
VL 129
IS 14
AR 144109
DI 10.1063/1.2988316
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 359ZD
UT WOS:000260025900009
PM 19045136
ER
PT J
AU Jackson, K
Ma, L
Yang, M
Jellinek, J
AF Jackson, K.
Ma, L.
Yang, M.
Jellinek, J.
TI Atomistic dipole moments and polarizabilities of Na(N) clusters, N=2-20
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID SODIUM CLUSTERS; ALKALI CLUSTERS; METAL-CLUSTERS; APPROXIMATION; NA(N)
AB The atomic-level response of NaN clusters, N = 2 -20, to a small static external electric field is studied using a method that decomposes the total cluster dipole moment and polarizability into contributions from nonoverlapping atomic volumes. The atomic dipole moments and polarizabilities are, in turn, partitioned into the so-called dipole and charge-transfer components. The former characterizes a dielectric type of a response, whereas the latter represents a metallic type of a response. Analysis of the atomic polarizabilities points to their strong dependence on the site, or location, of the atoms within the structure of the clusters. Surface atoms have larger polarizabilities than the interior ones. Overall, the fraction of the charge-transfer component of the averaged atomic polarizabilities is an increasing function of the cluster size. The charge-transfer component is also responsible for the structure/ shape driven variations in the atomic polarizabilities. The anisotropy of the total polarizabilities correlates with the shape anisotropy of the clusters. (C) 2008 American Institute of Physics.
C1 [Jackson, K.; Ma, L.] Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA.
[Yang, M.] Sichuan Univ, Inst Nanobiomed Technol & Membrane Biol, W China Med Sch, State Key Lab Biotherapy,W China Hosp, Chengdu 610041, Peoples R China.
[Jellinek, J.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Jackson, K (reprint author), Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA.
EM jacks1ka@cmich.edu; jellinek@anl.gov
RI Yang, Mingli/E-9983-2012; Ma, Li/B-1815-2016
OI Yang, Mingli/0000-0001-8590-8840; Ma, Li/0000-0003-0002-6350
NR 20
TC 18
Z9 18
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 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD OCT 14
PY 2008
VL 129
IS 14
AR 144309
DI 10.1063/1.2978169
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 359ZD
UT WOS:000260025900022
PM 19045149
ER
PT J
AU Hansen, SE
Gaherty, JB
Schwartz, SY
Rodgers, AJ
Al-Amri, AMS
AF Hansen, Samantha E.
Gaherty, James B.
Schwartz, Susan Y.
Rodgers, Arthur J.
Al-Amri, Abdullah M. S.
TI Seismic velocity structure and depth-dependence of anisotropy in the Red
Sea and Arabian shield from surface wave analysis
SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
LA English
DT Article
ID UPPER-MANTLE STRUCTURE; CONTINENTAL UPPER-MANTLE; AZIMUTHAL ANISOTROPY;
LITHOSPHERIC STRUCTURE; SAUDI-ARABIA; RECEIVER FUNCTIONS; UPPERMOST
MANTLE; KAAPVAAL CRATON; PLATE-MOTION; SIMPLE-SHEAR
AB We investigate the lithospheric and upper mantle shear wave velocity structure and the depth-dependence of anisotropy along the Red Sea and beneath the Arabian Peninsula using receiver function constraints and phase velocities of surface waves traversing two transects of stations from the Saudi Arabian National Digital Seismic Network. Frequency-dependent phase delays of fundamental-mode Love and Rayleigh waves, measured using a cross-correlation procedure, require very slow shear velocities and the presence of anisotropy to depths of at least 180 km in the upper mantle. Linearized inversion of these data produce path-averaged 1D radially anisotropic models with similar to 4% anisotropy in the lithosphere and across the lithosphere-asthenosphere boundary (LAB). Models with reasonable crustal velocities in which the mantle lithosphere is isotropic cannot satisfy the data. The lithosphere, which ranges in thickness from about 70 km near the Red Sea coast to about 90 km beneath the Arabian Shield, is underlain by a pronounced low-velocity zone with shear velocities as low as 4.1 km/s. Forward models of azimuthal anisotropy, which are constructed from previously determined shear wave splitting estimates, can reconcile surface and body wave observations of anisotropy. The low shear velocities extend to greater depth than those observed in other continental rift and oceanic ridge environments. The depth extent of these low velocities combined with the sharp velocity contrast across the LAB may indicate the influence of the Afar hot spot and the presence of partial melt beneath Arabia. The anisotropic signature primarily reflects a combination of plate- and density-driven flow associated with rifting processes in the Red Sea.
C1 [Al-Amri, Abdullah M. S.] King Saud Univ, Seism Studies Ctr, Riyadh 11451, Saudi Arabia.
[Gaherty, James B.] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA.
[Rodgers, Arthur J.] Lawrence Livermore Natl Lab, Energy & Environm Directorate, Livermore, CA 94551 USA.
[Schwartz, Susan Y.] Univ Calif Santa Cruz, Dept Earth & Planetary Sci, Santa Cruz, CA 95064 USA.
[Al-Amri, Abdullah M. S.] King Saud Univ, Dept Geol, Riyadh 11451, Saudi Arabia.
RP Hansen, SE (reprint author), Penn State Univ, Dept Geosci, University Pk, PA 16802 USA.
EM shansen@geosc.psu.edu
RI Rodgers, Arthur/E-2443-2011
FU CSIDE/IGPP; LLNL Student Employee Graduate Research; U. S. Department of
Energy by University of California; Lawrence Livermore National
Laboratory [W-7405-Eng-48]; LLNL [UCRL-JRNL-233119]
FX We thank Thorne Lay, Hanneke Paulssen, and Keith Priestley for their
helpful discussions as well as Michael Ritzwoller and two anonymous
reviewers for their thorough critiques of this manuscript. Figures were
prepared using GMT [Wessel and Smith, 1998]. Support for this work was
provided by CSIDE/IGPP and the LLNL Student Employee Graduate Research
Fellow program. 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. This is LLNL
contribution UCRL-JRNL-233119.
NR 63
TC 5
Z9 5
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9313
EI 2169-9356
J9 J GEOPHYS RES-SOL EA
JI J. Geophys. Res.-Solid Earth
PD OCT 14
PY 2008
VL 113
IS B10
AR B10307
DI 10.1029/2007JB005335
PG 16
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 362EC
UT WOS:000260180000002
ER
PT J
AU Tao, YF
Ma, BW
Segalman, RA
AF Tao, Yuefei
Ma, Biwu
Segalman, Rachel A.
TI Self-Assembly of Rod-Coil Block Copolymers and Their Application in
Electroluminescent Devices
SO MACROMOLECULES
LA English
DT Article
ID LIGHT-EMITTING-DIODES; CONJUGATED POLYMER BLENDS; ORDER-DISORDER
TRANSITION; DIBLOCK COPOLYMERS; RADICAL POLYMERIZATION; TRANSPORT
MATERIALS; SOLAR-CELLS; THIN-FILMS; GRAZING-INCIDENCE; FACILE SYNTHESIS
AB The formation of alternating electron transporting and hole transporting 15 nm lamellae within the active layer of an organic light-emitting diode (OLED) is demonstrated to improve device performance. A new multifunctional bipolar rod-coil block copolymer containing a poly(alkoxy phenylenevinylene) (PPV) rodshaped block as the hole transporting and emitting material and a poly(vinyloxadiazole) coil-shaped electron transporting block is synthesized. This new block copolymer is the active material of a self-assembling multicomponent electroluminescent device that can be deposited in a single step. In the thin film, grazing incidence X-ray scattering and transmission electron microscopy demonstrate that the layers form grains which are oriented bimodally: parallel and perpendicular from the anode. In this mixed orientation, the device demonstrates better performance than those with either pure PPV or a blend of the two analogous homopolymers as the active materials, i.e., higher external quantum efficiency (EQE) and brightness. This improved device performance is mainly attributed to the bipolar functionality and microphase separation of the block copolymer, which provide highly efficient hole and electron recombination at the nanodomain interfaces.
C1 [Segalman, Rachel A.] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
[Tao, Yuefei; Ma, Biwu] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Segalman, Rachel A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Segalman, RA (reprint author), Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
EM segalman@berkeley.edu
RI Ma, Biwu/B-6943-2012;
OI Segalman, Rachel/0000-0002-4292-5103
FU U.S. Department of Energy Office of Basic Energy Sciences (DOEBES)
[DE-AC02-05CH11231, W-31-109-ENG-38]
FX We gratefully acknowledge support from the Department of Energy Office
of Basic Energy Sciences (DOEBES) through the Plastic Electronics
Program at Lawrence Berkeley National Laboratory (LBNL). Work at the
Molecular Foundry was supported by the Office of Science, Office of
Basic Energy Sciences, of the U.S. Department of Energy under Contract
DE-AC02-05CH11231. SAXS experiments were performed at the Stanford
Synchrotron Radiation Laboratory, a national user facility operated by
Stanford University, and TEM experiments were performed at the National
Center for Electron Microscopy at LBNL, both supported by the Department
of Energy, Office of Basic Energy Sciences. GISAXS experiments were
conducted at the Advanced Photon Source, supported by the U.S.
Department of Energy, Office of Basic Energy Sciences, under Contract
W-31-109-ENG-38. The authors thank the APS Sector 8 staff for assistance
with these experiments and Bradley D. Olsen for helpful conversations
regarding GISAXS analysis.
NR 98
TC 53
Z9 53
U1 2
U2 38
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
J9 MACROMOLECULES
JI Macromolecules
PD OCT 14
PY 2008
VL 41
IS 19
BP 7152
EP 7159
DI 10.1021/ma800577g
PG 8
WC Polymer Science
SC Polymer Science
GA 357PY
UT WOS:000259859800042
ER
PT J
AU Bissell, MJ
Inman, J
AF Bissell, Mina J.
Inman, Jamie
TI Reprogramming stem cells is a microenvironmental task
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Editorial Material
ID MOUSE MAMMARY-GLAND; IN-VIVO; LIFE SPAN; FAT PADS; EPITHELIUM;
MORPHOGENESIS; HIERARCHY; GROWTH; CANCER; MODEL
C1 [Bissell, Mina J.; Inman, Jamie] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
RP Bissell, MJ (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM mjbissell@ibl.gov
NR 21
TC 9
Z9 9
U1 0
U2 0
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 OCT 14
PY 2008
VL 105
IS 41
BP 15637
EP 15638
DI 10.1073/pnas.0808457105
PG 2
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 363BM
UT WOS:000260240900001
PM 18843110
ER
PT J
AU El-Kady, I
Farfan, GB
Rammohan, R
Taha, MMR
AF El-Kady, I.
Farfan, G. B.
Rammohan, R.
Taha, M. M. Reda
TI Photonic crystal high-efficiency multispectral thermal emitters
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID LIGHT-EMISSION; MU-M; TUNGSTEN; BANDGAP
AB We demonstrate through numerical simulation the modification of the thermal emission spectrum by a metallic photonic crystal (PhC). Here the radiation is funneled into a narrow emission band in contrast to the broad spectrum associated with a Planckian-distribution. A detailed quantitative evaluation of the spectral, power, and angular efficiencies of a PhC thermal emitter and its portability across IR spectral bands is provided. We show that an optimized tungsten PhC possesses a predominant narrow-band forward emission profile with an emitter efficiency that is more than double that of an ideal blackbody and similar to 65-75% more power-efficient across the IR spectrum. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2993336]
C1 [El-Kady, I.] Sandia Natl Labs, Dept Photon Microsyst Technol, Albuquerque, NM 87185 USA.
[El-Kady, I.] Univ New Mexico, Dept Elect & Comp Engn, Albuquerque, NM 87185 USA.
[Farfan, G. B.; Taha, M. M. Reda] Univ New Mexico, Dept Elect & Comp Engn, Albuquerque, NM 87131 USA.
[Rammohan, R.] Univ New Mexico, Dept Comp Sci, Albuquerque, NM 87131 USA.
[Taha, M. M. Reda] Univ New Mexico, Dept Civil Engn, Albuquerque, NM 87131 USA.
RP El-Kady, I (reprint author), Sandia Natl Labs, Dept Photon Microsyst Technol, POB 5800, Albuquerque, NM 87185 USA.
EM ielkady@sandia.gov
RI El-Kady, Ihab/D-2886-2013
OI El-Kady, Ihab/0000-0001-7417-9814
FU Sandia National Laboratories operated by the Sandia Corporation;
Lockheed Martin Co; U.S. DOE-NNSA [DE-AC0494AL85000]
FX This work was supported by Sandia National Laboratories operated by the
Sandia Corporation, a Lockheed Martin Co., for the U.S. DOE-NNSA under
Contract No. DE-AC0494AL85000.
NR 15
TC 7
Z9 7
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD OCT 13
PY 2008
VL 93
IS 15
AR 153501
DI 10.1063/1.2993336
PG 3
WC Physics, Applied
SC Physics
GA 361JY
UT WOS:000260125100097
ER
PT J
AU Fang, JX
Kong, P
Ding, BJ
Song, XP
Han, Y
Hahn, H
Gleiter, H
AF Fang, Jixiang
Kong, Peng
Ding, Bingjun
Song, Xiaoping
Han, Yong
Hahn, Horst
Gleiter, Herbert
TI Single crystal growth via a grain rotation mechanism within amorphous
matrix
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID ORIENTED ATTACHMENT; PHASE; NANOPARTICLES; METALS
AB The molecular dynamics simulations were applied to study the crystallization of Ag from an amorphous matrix. The results show that the spontaneously crystallized nuclei interact with the amorphous phase, undergoing a rotation and realignment process, promote the crystallization of amorphous phase, and finally form a single crystalline nanostructure. Our results not only provide a system for the theoretical study on the amorphous formation and its function in the crystal growth but also break a path for producing single crystals. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3001576]
C1 [Fang, Jixiang; Kong, Peng; Ding, Bingjun; Song, Xiaoping] Xian Jiaotong Univ, Sch Sci, State Key Lab Mech Behav Mat, Shann Xi 710049, Peoples R China.
[Han, Yong] Iowa State Univ, Inst Phys Res & Technol, Ames, IA 50011 USA.
[Han, Yong] Iowa State Univ, Ames Lab USDOE, Ames, IA 50011 USA.
[Fang, Jixiang; Hahn, Horst; Gleiter, Herbert] Forschungszentrum Karlsruhe, Inst Nanotechnol, D-76021 Karlsruhe, Germany.
RP Fang, JX (reprint author), Xian Jiaotong Univ, Sch Sci, State Key Lab Mech Behav Mat, Shann Xi 710049, Peoples R China.
EM jxfang@mailst.xjtu.edu.cn
RI Song, Xiaoping/E-7788-2010; Hahn, Horst/G-9018-2011; Han,
Yong/F-5701-2012; Fang, Jixiang/C-5981-2015
OI Hahn, Horst/0000-0001-9901-3861; Han, Yong/0000-0001-5404-0911;
NR 19
TC 4
Z9 4
U1 0
U2 13
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 OCT 13
PY 2008
VL 93
IS 15
AR 153115
DI 10.1063/1.3001576
PG 3
WC Physics, Applied
SC Physics
GA 361JY
UT WOS:000260125100086
ER
PT J
AU Fister, TT
Fong, DD
Eastman, JA
Baldo, PM
Highland, MJ
Fuoss, PH
Balasubramaniam, KR
Meador, JC
Salvador, PA
AF Fister, Tim T.
Fong, Dillon D.
Eastman, Jeffrey A.
Baldo, Peter M.
Highland, Matthew J.
Fuoss, Paul H.
Balasubramaniam, Kavaipatti R.
Meador, Joanna C.
Salvador, Paul A.
TI In situ characterization of strontium surface segregation in epitaxial
La(0.7)Sr(0.3)MnO(3) thin films as a function of oxygen partial pressure
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID PULSED-LASER DEPOSITION; OXIDE FUEL-CELL; MAGNETORESISTANCE; MANGANITES;
REDUCTION; CHEMISTRY; JUNCTIONS; CATHODES
AB Using in situ synchrotron measurements of total reflection x-ray fluorescence, we find evidence of strontium surface segregation in (001)-oriented La(0.7)Sr(0.3)MnO(3) thin films over a wide range of temperatures (25-900 degrees C) and oxygen partial pressures (pO(2)=0.15-150 Torr). The strontium surface concentration is observed to increase with decreasing pO(2), suggesting that the surface oxygen vacancy concentration plays a significant role in controlling the degree of segregation. Interestingly, the enthalpy of segregation becomes less exothermic with increasing pO(2), varying from -9.5 to -2.0 kJ/mol. In contrast, the La(0.7)Sr(0.3)MnO(3) film thickness and epitaxial strain state have little impact on segregation behavior. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2987731]
C1 [Fister, Tim T.; Fong, Dillon D.; Eastman, Jeffrey A.; Baldo, Peter M.; Highland, Matthew J.; Fuoss, Paul H.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60349 USA.
[Balasubramaniam, Kavaipatti R.; Meador, Joanna C.; Salvador, Paul A.] Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA.
RP Fuoss, PH (reprint author), Argonne Natl Lab, Div Mat Sci, Argonne, IL 60349 USA.
EM fuoss@anl.gov
RI Salvador, Paul/A-9435-2011; Eastman, Jeffrey/E-4380-2011
OI Salvador, Paul/0000-0001-7106-0017;
FU U.S. Department of Energy (DOE), Basic Energy Sciences
[DE-AC02-06CH11357]
FX Assistance by the beamline staff at sectors 12 and 20 at the Advanced
Photon Source is gratefully acknowledged. Support was provided by the
U.S. Department of Energy (DOE), Basic Energy Sciences, under Contract
No. DE-AC02-06CH11357 and through the DOE Strategic Energy Conversion
Alliance (SECA) program.
NR 29
TC 71
Z9 71
U1 3
U2 46
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 OCT 13
PY 2008
VL 93
IS 15
AR 151904
DI 10.1063/1.2987731
PG 3
WC Physics, Applied
SC Physics
GA 361JY
UT WOS:000260125100024
ER
PT J
AU Juan, ML
Plain, J
Bachelot, R
Royer, P
Gray, SK
Wiederrecht, GP
AF Juan, M. L.
Plain, J.
Bachelot, R.
Royer, P.
Gray, S. K.
Wiederrecht, G. P.
TI Stochastic model for photoinduced surface relief grating formation
through molecular transport in polymer films
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID AZOBENZENE; ANISOTROPY; MOTIONS
AB We use a stochastic model to study photoinduced surface relief grating (SRG) formation due to molecular transport in azobenzene polymer films. The model is shown to reproduce the essential experimental features of SRG formation. In particular, it predicts SRG formation under both p and s polarizations, and the double peaked topographies that can occur at early times of the process. The evolving molecular positions and orientations during exposure are also followed, providing a useful mechanistic picture of SRG dynamics. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2999625]
C1 [Juan, M. L.; Plain, J.; Bachelot, R.; Royer, P.] Univ Technol Troyes, Lab Nanotechnol & Instrumentat Opt, ICD CNRS FRE 2848, Troyes, France.
[Gray, S. K.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
[Wiederrecht, G. P.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Bachelot, R (reprint author), Univ Technol Troyes, Lab Nanotechnol & Instrumentat Opt, ICD CNRS FRE 2848, BP 2060, Troyes, France.
EM renaud.bachelot@utt.fr
RI Plain, Jerome/A-2888-2009; Juan, Mathieu/C-6331-2008; Bachelot,
Renaud/M-6888-2015
OI Juan, Mathieu/0000-0002-2740-8001;
FU European Social Fund; Conseil General de l'Aube; French national agency
for research (ANR 2007); Region Champagne-Ardenne [E2007-08052]; U.S.
Department of Energy, Office of Science, Office of Basic Energy Sciences
[DE-AC02-06CH11357]
FX One of the author's Ph.D. research (M.J.) was supported by the European
Social Fund and the Conseil General de l'Aube (distric grant). This work
was financially supported by the French national agency for research
(ANR 2007) through the "photohybrid" project and by the Region
Champagne-Ardenne (projet Emergence No. 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 Sciences, under Contract No. DE-AC02-06CH11357.
NR 11
TC 15
Z9 15
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 OCT 13
PY 2008
VL 93
IS 15
AR 153304
DI 10.1063/1.2999625
PG 3
WC Physics, Applied
SC Physics
GA 361JY
UT WOS:000260125100091
ER
PT J
AU Tambe, MJ
Lim, SK
Smith, MJ
Allard, LF
Gradecak, S
AF Tambe, Michael J.
Lim, Sung Keun
Smith, Matthew J.
Allard, Lawrence F.
Gradecak, Silvija
TI Realization of defect-free epitaxial core-shell GaAs/AlGaAs nanowire
heterostructures
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID GROWTH; GAAS; HETEROJUNCTION; TRANSISTORS
AB We report the controlled growth of vertically aligned GaAs/AlGaAs core-shell nanowires. By optimizing the shell deposition temperature and catalyst density we maintain high temperature stability and achieve defect-free epitaxial AlGaAs shell deposition with high aluminum incorporation. Energy dispersive x-ray analysis determines the shell composition to be Al(0.9)Ga(0.1)As and measures the uniformity of the shell thickness. Lattice-resolved high-angle annular dark-field scanning transmission electron microscopy images confirm the core-shell interface to be defect-free, epitaxial, and atomically sharp. The ability to realize GaAs/AlGaAs core-shell nanowires with precise control over the morphology and composition is essential to the development of nanowire-based high mobility electronics. (c) 2008 American Institute of Physics.
C1 [Tambe, Michael J.; Lim, Sung Keun; Smith, Matthew J.; Gradecak, Silvija] MIT, Dept Mat & Engn, Cambridge, MA 02139 USA.
[Allard, Lawrence F.] Oak Ridge Natl Lab, High Temp Mat Lab, Oak Ridge, TN 37831 USA.
RP Gradecak, S (reprint author), MIT, Dept Mat & Engn, Cambridge, MA 02139 USA.
EM gradecak@mit.edu
FU Cambridge Foundation; 3M; Interconnect Focus Center; MIT; Division of
Scientific User Facilities; Office of Basic Energy Sciences; U. S.
Department of Energy
FX The authors thank E. A. Fitzgerald for access to MOCVD facilities, the
MIT Center for Materials Science and Engineering, a NSF-funded MRSEC,
for use of electron microscopy facilities, and S. T. Boles for MOCVD
assistance and helpful discussions. S. K. L. acknowledges the Cambridge
Foundation for graduate research fellowship support. S. G. acknowledges
3M, the Interconnect Focus Center, and MIT startup funds for financial
support. A portion of this research was conducted at the SHaRE User
Facility, which is sponsored by the Division of Scientific User
Facilities, Office of Basic Energy Sciences, U. S. Department of Energy.
NR 21
TC 47
Z9 48
U1 4
U2 19
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 OCT 13
PY 2008
VL 93
IS 15
AR 151917
DI 10.1063/1.3002299
PG 3
WC Physics, Applied
SC Physics
GA 361JY
UT WOS:000260125100037
ER
PT J
AU Ulrich, TJ
Sutin, AM
Claytor, T
Papin, P
Le Bas, PY
TenCate, JA
AF Ulrich, T. J.
Sutin, Alexander M.
Claytor, Thomas
Papin, Pallas
Le Bas, Pierre-Yves
TenCate, James A.
TI The time reversed elastic nonlinearity diagnostic applied to evaluation
of diffusion bonds
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID SPECTROSCOPY; MODULATION; SOLIDS; DAMAGE; WAVE
AB With the recent application of time reversed acoustics and nonlinear elasticity to imaging mechanical damage, the development of time reversal based nondestructive evaluation techniques has begun. Here, diffusion bonded metal disks containing intentionally disbonded regions are analyzed using the time reversed elastic nonlinearity diagnostic. The nonlinear results are compared with linear ultrasonic imaging (C scan). Scanning electron microscopy is shown to illustrate the differences between the features seen by the linear and nonlinear methods. (c) 2008 American Institute of Physics.
C1 [Ulrich, T. J.; Le Bas, Pierre-Yves; TenCate, James A.] Los Alamos Natl Lab, EES 11, Los Alamos, NM 87545 USA.
[Sutin, Alexander M.] Stevens Inst Technol, Hoboken, NJ 07030 USA.
[Claytor, Thomas] Los Alamos Natl Lab, AET 6, Los Alamos, NM 87545 USA.
[Papin, Pallas] Los Alamos Natl Lab, MST 6, Los Alamos, NM 87545 USA.
RP Ulrich, TJ (reprint author), Los Alamos Natl Lab, EES 11, Los Alamos, NM 87545 USA.
EM tju@lanl.gov
FU Institutional Support (Campaign 8 and LDRD)
FX This work was supported by Institutional Support (Campaign 8 and LDRD)
at the Los Alamos National Laboratory. The authors are grateful for
invaluable input from Paul Johnson, Robert Guyer and Tarik Saleh.
NR 14
TC 27
Z9 27
U1 1
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 OCT 13
PY 2008
VL 93
IS 15
AR 151914
DI 10.1063/1.2998408
PG 3
WC Physics, Applied
SC Physics
GA 361JY
UT WOS:000260125100034
ER
PT J
AU Yi, DC
Greve, A
Hales, JH
Senesac, LR
Davis, ZJ
Nicholson, DM
Boisen, A
Thundat, T
AF Yi, Dechang
Greve, Anders
Hales, Jan H.
Senesac, Larry R.
Davis, Zachary J.
Nicholson, Don M.
Boisen, Anja
Thundat, Thomas
TI Detection of adsorbed explosive molecules using thermal response of
suspended microfabricated bridges
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID ELECTRONIC NOSES; VAPOR MIXTURES; MICROCANTILEVERS; ADSORPTION;
COATINGS; ARRAY
AB Here we present a thermophysical technique that is capable of differentiating vapor phase adsorbed explosives from nonexplosives and is additionally capable of differentiating individual species of common explosive vapors. This technique utilizes pairs of suspended microfabricated silicon bridges that can be heated in a controlled fashion. The differential thermal response of the bridges with and without adsorbed explosive vapor shows unique and reproducible characteristics depending on the nature of the adsorbed explosives. The tunable heating rate method described here is capable of providing unique signals for subnanogram quantities of adsorbed explosives within 50 ms. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3002285]
C1 [Yi, Dechang; Senesac, Larry R.; Nicholson, Don M.; Thundat, Thomas] Oak Ridge Natl Lab, Biosci Div, Oak Ridge, TN 37831 USA.
[Greve, Anders; Hales, Jan H.; Davis, Zachary J.; Boisen, Anja] Tech Univ Denmark, MIC, DK-2800 Lyngby, Denmark.
[Senesac, Larry R.; Thundat, Thomas] Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA.
RP Thundat, T (reprint author), Oak Ridge Natl Lab, Biosci Div, Oak Ridge, TN 37831 USA.
EM thundattg@onrl.gov
RI Boisen, Anja/F-9442-2011
OI Boisen, Anja/0000-0002-9918-6567
FU U. S. Department of Energy [DE-AC05-00OR22725]
FX We thank Dr. Richard Lareau and Dr. Eric Houser for discussions on
explosive detection. This research was supported in part by U. S.
Department of Homeland Security and the Office of Naval Research. ORNL
is managed by UT-Battelle and LLC for the U. S. Department of Energy
under Contract No. DE-AC05-00OR22725.
NR 19
TC 22
Z9 22
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 OCT 13
PY 2008
VL 93
IS 15
AR 154102
DI 10.1063/1.3002285
PG 3
WC Physics, Applied
SC Physics
GA 361JY
UT WOS:000260125100108
ER
PT J
AU Negres, RA
Saw, CK
DeMange, P
Demos, SG
AF Negres, R. A.
Saw, C. K.
DeMange, P.
Demos, S. G.
TI Laser damage performance of KD2-xHxPO4 crystals following X-ray
irradiation
SO OPTICS EXPRESS
LA English
DT Article
ID POTASSIUM DIHYDROGEN PHOSPHATE; ELECTRON-SPIN-RESONANCE; KH2PO4
CRYSTALS; GROWTH; KD2PO4; IDENTIFICATION; ABSORPTION; CENTERS; KDP
AB We investigate the laser-induced damage performance of KD2-xHxPO4 crystals following exposure to X-ray irradiation. Two important issues addressed by our study are i) the performance of the material when operational conditions lead to its exposure to ionizing irradiation and ii) the way the radiation-induced transient defects interact with the pre-existing precursor defects responsible for laser-induced damage. Our results indicate that the damage performance of the material is affected by exposure to X-rays. This behavior is attributed to a change in the physical properties of the precursors which, in turn, affect their ability to initiate damage following interaction with X-ray generated defects.
C1 [Negres, R. A.; Saw, C. K.; DeMange, P.; Demos, S. G.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Negres, RA (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave, Livermore, CA 94550 USA.
EM negres2@llnl.gov
FU Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
FX We thank Dr. S. O. Kucheyev and Dr. L. E. Halliburton for useful
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 24
TC 5
Z9 5
U1 2
U2 9
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 OCT 13
PY 2008
VL 16
IS 21
BP 16326
EP 16333
DI 10.1364/OE.16.016326
PG 8
WC Optics
SC Optics
GA 371XB
UT WOS:000260864900005
PM 18852738
ER
PT J
AU Le, KQ
Godoy-Rubio, R
Bienstman, P
Hadley, GR
AF Le, Khai Q.
Godoy-Rubio, R.
Bienstman, Peter
Hadley, G. Ronald
TI The complex Jacobi iterative method for three-dimensional wide-angle
beam propagation
SO OPTICS EXPRESS
LA English
DT Article
ID WAVE-GUIDE STRUCTURES; PADE APPROXIMANT; EQUATION
AB A new complex Jacobi iterative technique adapted for the solution of three-dimensional (3D) wide-angle (WA) beam propagation is presented. The beam propagation equation for analysis of optical propagation in waveguide structures is based on a novel modified Pade(1,1) approximant operator, which gives evanescent waves the desired damping. The resulting approach allows more accurate approximations to the true Helmholtz equation than the standard Pade approximant operators. Furthermore, a performance comparison of the traditional direct matrix inversion and this new iterative technique for WA-beam propagation method is reported. It is shown that complex Jacobi iteration is faster and better-suited for large problems or structures than direct matrix inversion. (C) 2008 Optical Society of America
C1 [Le, Khai Q.; Bienstman, Peter] Univ Ghent, IMEC, Dept Informat Technol, B-9000 Ghent, Belgium.
[Godoy-Rubio, R.] Univ Malaga, Dept Ingn Comunicac, E-29071 Malaga, Spain.
[Hadley, G. Ronald] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Le, KQ (reprint author), Univ Ghent, IMEC, Dept Informat Technol, St Pietersnieuwstr 4, B-9000 Ghent, Belgium.
EM khai.le@intec.ugent.be
OI Godoy Rubio, Rafael/0000-0002-4107-9048
FU Belgian IAP project Photonics@Be; Spanish CICYT [TEC2006-02868];
Andalusian CICYE [TIC-02946]; "Juan de la Cierva" National Fellowship
program
FX Parts of this work were performed within the context of the Belgian IAP
project Photonics@Be. R. Godoy-Rubio would like to thank the Spanish
CICYT Project TEC2006-02868, the Andalusian CICYE Project TIC-02946 and
the "Juan de la Cierva" National Fellowship program.
NR 20
TC 17
Z9 17
U1 0
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 OCT 13
PY 2008
VL 16
IS 21
BP 17021
EP 17030
DI 10.1364/OE.16.017021
PG 10
WC Optics
SC Optics
GA 371XB
UT WOS:000260864900079
PM 18852812
ER
PT J
AU Fortman, GC
Isrow, D
McDonough, JE
Schleyer, PV
Schaefer, HF
Scott, B
Kubas, GJ
Kegl, T
Ungvary, F
Hoff, CD
AF Fortman, George C.
Isrow, Derek
McDonough, James E.
Schleyer, Paul von Rague
Schaefer, Henry F., III
Scott, Brian
Kubas, Gregory J.
Kegl, Tamas
Ungvary, Ferenc
Hoff, Carl D.
TI Kinetic and thermodynamic studies of the reactivity of
(trimethylsilyl)diazomethane with HMo(CO)(3)(C(5)R(5)) (R = H, Me).
Estimation of the Mo-N(2)CH(2)SiMe(3) bond strength and experimental
determination of the enthalpy of formation of
(trimethylsilyl)diazomethane
SO ORGANOMETALLICS
LA English
DT Article
ID REDUCTIVE ELIMINATION; GAS-PHASE; OXIDATIVE ADDITION; COMPLEXES;
DIAZOMETHANE; SPECTROSCOPY; MOLYBDENUM; ENERGY; HEATS; APPROXIMATION
AB The rates of reaction of N(2)CHSiMe(3) with HMo(CO)(3)CP (CP=eta(5)-C(5)H(5)) in heptane obey the rate law -d[HMo(CO)(3)Cp]/dt=k[HMo(CO)(3)Cp][N(2)CHSiMe(3)] (k=0.035 +/- 0.01 Ms(-1)s(-1) at 0 degrees C; Delta H(double dagger)=11.7 +/- 2.0 kcal/mol and Delta S(double dagger)=-22.0 +/- 3.0 cal/(mol K)). Isotopic scrambling between DMO(CO)(3)Cp and N2CHSiMe3 occurs at a rate faster than the overall reaction. Reversible 1,2-addition to form the tightly bound intermediate [Me(3)SiCH(2)N(beta)=N(alpha)(delta+)[(delta-)Mo(CO)(3)CP] is proposed as the first step of the reaction. Spectroscopic and computational data support this formulation. The contact ion pairs can undergo heterolytic cleavage to ions or homolytic cleavage to radicals, and the solvent influence on k(obs) (THF > toluene > heptane) is interpreted in terms of this model. The enthalpy of this reaction has been measured by solution calorimetry at 272 K in THF: Delta H=-11.6 +/- 1.2 kcal/mol. These data, together with computed organic reaction energies allow estimation of the bond strength between the three-electron donors center dot N(2)CHSiMe(3) and center dot MO(CO)(2)Cp to be 25 +/- 5 kcal/mol stronger than the two-electron Mo - CO bond. Coordination of N(2)CHSiMe(3) to the complexes M(PR(3))(2)(CO)(3) (M=Mo, W; R=Cy,(i)Pr; Cy=cyclohexyl;(i)Pr=isopropyl) alters the course of reaction with HMo(CO)3CP. The stoichiometric reaction of Me(3)SiCH= N=NMo(P(i)Pr(3))(2)(CO)(3) with 2 equiv of HMo(CO)(3)Cp produces SiMe(4), Mo(N(2))(P(i)Pr(3))(2)(CO)(3), and [MO(CO)(3)CP](2). In the presence of excess N(2)CHSiMe(3) this reaction is catalytic and has been used to experimentally measure the heat of hydrogenation of N2CHSiMe3 to N2 and SiMe4 by 2 equiv of HMo(CO)(3)Cp. The derived enthalpy of formation of N(2)CHSiMe(3) (5.8 +/- 3.0 kcal/mol) is in reasonable agreement with high-level theoretical calculations. X-ray crystal structure data are reported for W(CO)(2)(N(2)CH(2)SiMe(3))Cp: triclinic, space group P (1) over bar, a=6.3928(7)angstrom, b=10.6551(12) angstrom, c=10.8766(12) angstrom, alpha=100.632(2)degrees, beta=96.254(2)degrees, V=721.32 angstrom(3), Z=2.
C1 [Schleyer, Paul von Rague; Schaefer, Henry F., III] Univ Georgia, Dept Chem, Athens, GA 30606 USA.
[Schleyer, Paul von Rague; Schaefer, Henry F., III] Univ Georgia, Ctr Computat Chem, Athens, GA 30606 USA.
[Fortman, George C.; Isrow, Derek; McDonough, James E.; Hoff, Carl D.] Univ Miami, Dept Chem, Coral Gables, FL 33126 USA.
[Scott, Brian; Kubas, Gregory J.] Los Alamos Natl Lab, Struct Inorgan Chem Grp, Div Chem, Los Alamos, NM 87545 USA.
[Kegl, Tamas; Ungvary, Ferenc] Univ Pannonia, Dept Organ Chem, H-8201 Veszprem, Hungary.
RP Schleyer, PV (reprint author), Univ Georgia, Dept Chem, Athens, GA 30606 USA.
RI Scott, Brian/D-8995-2017
OI Scott, Brian/0000-0003-0468-5396
FU National Science Foundation [CHE 0615743, CHE 0716718]; Hungarian
Scientific Research Fund [OTKA NK 71906]
FX We dedicate this article to Professor R. Bruce King of the University of
Georgia and thank Professor Joel Liebman, the University of Maryland,
Baltimore County, and Dr. Manuel Temprado for helpful discussions.
Support of this work by the National Science Foundation (Grant Nos. CHE
0615743 and CHE 0716718) and by the Hungarian Scientific Research Fund
(Grant No. OTKA NK 71906) is gratefully acknowledged.
NR 53
TC 1
Z9 1
U1 1
U2 7
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0276-7333
J9 ORGANOMETALLICS
JI Organometallics
PD OCT 13
PY 2008
VL 27
IS 19
BP 4873
EP 4884
DI 10.1021/om800336p
PG 12
WC Chemistry, Inorganic & Nuclear; Chemistry, Organic
SC Chemistry
GA 353YB
UT WOS:000259604200011
ER
PT J
AU Volkow, ND
Wang, GJ
Fowler, JS
Telang, F
AF Volkow, Nora D.
Wang, Gene-Jack
Fowler, Joanna S.
Telang, Frank
TI Overlapping neuronal circuits in addiction and obesity: evidence of
systems pathology
SO PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
LA English
DT Article; Proceedings Paper
CT Royal-Society-Discussion Meeting on Neurobiology of Drug Addiction
CY FEB 25-26, 2008
CL London, ENGLAND
SP Royal Soc Discuss
DE dopamine; positron emission tomography; imaging; self-control;
compulsion
ID ORBITOFRONTAL CORTEX; DOPAMINE-D-2 RECEPTORS; DRUG-ADDICTION; HUMAN
BRAIN; VENTRAL STRIATUM; COCAINE ABUSERS; DORSAL STRIATUM; FOOD STIMULI;
ACTIVATION; METABOLISM
AB Drugs and food exert their reinforcing effects in part by increasing dopamine (DA) in limbic regions, which has generated interest in understanding how drug abuse/addiction relates to obesity. Here, we integrate findings from positron emission tomography imaging studies on DA's role in drug abuse/addiction and in obesity and propose a common model for these two conditions. Both in abuse/addiction and in obesity, there is an enhanced value of one type of reinforcer (drugs and food, respectively) at the expense of other reinforcers, which is a consequence of conditioned learning and resetting of reward thresholds secondary to repeated stimulation by drugs (abuse/addiction) and by large quantities of palatable food (obesity) in vulnerable individuals (i.e. genetic factors). In this model, during exposure to the reinforcer or to conditioned cues, the expected reward (processed by memory circuits) overactivates the reward and motivation circuits while inhibiting the cognitive control circuit, resulting in an inability to inhibit the drive to consume the drug or food despite attempts to do so. These neuronal circuits, which are modulated by DA, interact with one another so that disruption in one circuit can be buffered by another, which highlights the need of multiprong approaches in the treatment of addiction and obesity.
C1 [Volkow, Nora D.] NIDA, Bethesda, MD 20892 USA.
[Volkow, Nora D.; Telang, Frank] NIAAA, Bethesda, MD 20892 USA.
[Wang, Gene-Jack; Fowler, Joanna S.] Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA.
RP Volkow, ND (reprint author), NIDA, Bethesda, MD 20892 USA.
EM nvolkow@nida.nih.gov
FU Intramural NIH HHS [Z99 DA999999]
NR 55
TC 313
Z9 320
U1 8
U2 69
PU ROYAL SOC
PI LONDON
PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND
SN 0962-8436
J9 PHILOS T R SOC B
JI Philos. Trans. R. Soc. B-Biol. Sci.
PD OCT 12
PY 2008
VL 363
IS 1507
BP 3191
EP 3200
DI 10.1098/rstb.2008.0107
PG 10
WC Biology
SC Life Sciences & Biomedicine - Other Topics
GA 345AW
UT WOS:000258969400009
PM 18640912
ER
PT J
AU Brunet, T
Jia, XP
Johnson, PA
AF Brunet, Thomas
Jia, Xiaoping
Johnson, Paul A.
TI Transitional nonlinear elastic behaviour in dense granular media
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID PROPAGATION
AB Nonlinear sound propagation in a stressed glass bead pack is investigated via amplitude measurements of harmonic generation. We evidence two distinct regimes of sound-matter interaction: reversible and irreversible, as a function of the ratio r(s) between dynamic strain and static one. In the reversible regime, the higher harmonics generated agree well with a mean-field model based on the Hertz contact theory, and the coefficient of nonlinearity beta deduced from the measured amplitude of second-harmonic is consistent with that deduced from the acoustoelastic measurement. Beyond a certain threshold (r(s) > 3%), the interaction of sound wave with granular matter becomes irreversible, accompanied by a small compaction of the medium.
C1 [Brunet, Thomas; Jia, Xiaoping] Univ Paris Est, CNRS, UMR8108, LPMDI, F-77454 Marne La Vallee, France.
[Johnson, Paul A.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Brunet, T (reprint author), Univ Paris Est, CNRS, UMR8108, LPMDI, Cite Descartes, F-77454 Marne La Vallee, France.
EM jia@univ-mlv.fr
OI Johnson, Paul/0000-0002-0927-4003
NR 16
TC 26
Z9 26
U1 0
U2 9
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 OCT 11
PY 2008
VL 35
IS 19
AR L19308
DI 10.1029/2008GL035264
PG 4
WC Geosciences, Multidisciplinary
SC Geology
GA 359LH
UT WOS:000259987700002
ER
PT J
AU Davis, VA
Mandell, MJ
Thomsen, MF
AF Davis, V. A.
Mandell, M. J.
Thomsen, M. F.
TI Representation of the measured geosynchronous plasma environment in
spacecraft charging calculations
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID SURFACES; ATS-6; POTENTIALS; ELECTRONS; ANALYZER; ORBIT
AB Historically, the characterization of the magnetospheric environment has limited our ability to determine spacecraft surface charging levels. One difficulty lies in the common practice of fitting the plasma data to a Maxwellian or Double Maxwellian distribution function, which may not represent the data well for use in spacecraft charging simulations. We use electron and ion flux spectra measured by the Los Alamos National Laboratory (LANL) Magnetospheric Plasma Analyzer (MPA) during eclipse in September 2001 to examine how the use of different spectral representations of the charged particle environment in computations of spacecraft potentials during magnetospheric substorms affects the accuracy of the results. We examine charging and noncharging flux spectra and the relationships between the density and temperature moments. We then calculate the spacecraft potential ( zero net current) using both the measured fluxes and several different fits to these fluxes. The potential computed using the measured fluxes and secondary and backscattered fluxes computed for graphite carbon, with a constant fraction of 81% of secondary electrons escaping, is within a factor of three of the measured potential for 87% of the data. Potentials calculated using a Kappa function fit to the electron flux and a Maxwellian function fit to the ion flux agree with measured potentials nearly as well. Alternative spectral representations give less accurate estimates. The use of all the components of the net flux, along with spacecraft specific average material properties, gives a better estimate of the spacecraft potential than the measured flux from a single high-energy channel.
C1 [Davis, V. A.; Mandell, M. J.] Sci Applicat Int Corp, San Diego, CA 92121 USA.
[Thomsen, M. F.] Los Alamos Natl Lab, Los Alamos, NM USA.
RP Davis, VA (reprint author), Sci Applicat Int Corp, 10260 Campus Point Dr,MS A-1A, San Diego, CA 92121 USA.
EM victoria.a.davis@saic.com
FU NASA
FX The authors gratefully acknowledge funding provided by the NASA Living
With a Star/Space Environment Testbeds Program Element at Goddard Space
Flight Center through the Space Environments and Effects Program at the
NASA/Marshall Space Flight Center. Work at Los Alamos was conducted
under the auspices of the U. S. Department of Energy, with additional
support from the NASA Living With a Star program.
NR 29
TC 11
Z9 11
U1 2
U2 4
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 OCT 11
PY 2008
VL 113
IS A10
AR A10204
DI 10.1029/2008JA013116
PG 14
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 359MU
UT WOS:000259992000001
ER
PT J
AU Hosokawa, K
Taguchi, S
Suzuki, S
Collier, MR
Moore, TE
Thomsen, MF
AF Hosokawa, K.
Taguchi, S.
Suzuki, S.
Collier, M. R.
Moore, T. E.
Thomsen, M. F.
TI Estimation of magnetopause motion from low-energy neutral atom emission
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID SOLAR-WIND CONDITIONS; SUBSOLAR ENA JET; GEOSYNCHRONOUS ORBIT; EARTHS
MAGNETOPAUSE; PLASMA OBSERVATIONS; BOW SHOCK; FIELD; SHAPE; MARS;
CROSSINGS
AB A new method for deriving the position of the dayside equatorial magnetopause directly from the measured intensity of energetic neutral atom (ENA) emissions is presented. This approach makes it possible to track the position of the magnetopause using data observed by the low-energy neutral atom (LENA) imager on board the Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) spacecraft. The model is applied to data recorded during a period of high solar wind dynamic pressure on 13 April 2001. In this interval, significant ENA flux was observed originating from the dayside low-latitude magnetosheath. This ENA flux is primarily the result of enhanced charge exchange between the increased solar wind plasma and exospheric hydrogen neutrals. The temporal variation in the estimated magnetopause position is compared with in situ measurements of magnetopause crossings by the LANL-01A spacecraft in geosynchronous orbit and the results of a recent empirical magnetopause model. It is demonstrated that the subsolar distance of the magnetopause was successfully tracked for a period of more than 1 h. In this particular case example, the dayside magnetopause is closer to the Earth and fluctuates on a shorter timescale than predicted by the previous empirical model based on in situ data. It is also revealed that the subsolar magnetopause can move with speeds of 100-200 km s(-1) in response to marked dynamic pressure changes, and during periods of stable dynamic pressure can fluctuates with speeds of up to 50 km s(-1).
C1 [Hosokawa, K.; Taguchi, S.; Suzuki, S.] Univ Electrocommun, Dept Informat & Commun Engn, Tokyo 1828585, Japan.
[Collier, M. R.; Moore, T. E.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Thomsen, M. F.] Los Alamos Natl Lab, Los Alamos, NM USA.
RP Hosokawa, K (reprint author), Univ Electrocommun, Dept Informat & Commun Engn, 1-5-1 Chofugaoka, Tokyo 1828585, Japan.
EM hosokawa@ice.uec.ac.jp; taguchi@ice.uec.ac.jp; shin.s@ice.uec.ac.jp;
michael.r.collier@nasa.gov; tmoore@pop600.gsfc.nasa.gov;
mthomsen@lanl.gov
RI Moore, Thomas/D-4675-2012; Collier, Michael/I-4864-2013
OI Moore, Thomas/0000-0002-3150-1137; Collier, Michael/0000-0001-9658-6605
FU Japan Society for the Promotion of Science [18540443]; Goddard Space
Flight Center [UPN 370-28-20]
FX This research was supported by a Grant-in-Aid (18540443, Category C)
from the Japan Society for the Promotion of Science, and by the IMAGE
project (UPN 370-28-20) at the Goddard Space Flight Center. The authors
wish to thank N. Ness at the Bartol Research Institute for access to
data from the MFI and SWE instruments on board the ACE spacecraft.
NR 31
TC 7
Z9 7
U1 0
U2 1
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 OCT 11
PY 2008
VL 113
IS A10
AR A10205
DI 10.1029/2008JA013124
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 359MU
UT WOS:000259992000002
ER
PT J
AU Lima, M
Cunha, CE
Oyaizu, H
Frieman, J
Lin, H
Sheldon, ES
AF Lima, Marcos
Cunha, Carlos E.
Oyaizu, Hiroaki
Frieman, Joshua
Lin, Huan
Sheldon, Erin S.
TI Estimating the redshift distribution of photometric galaxy samples
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE galaxies: distances and redshifts; galaxies: statistics; distance scale;
large-scale structure of Universe
ID DIGITAL SKY SURVEY; DEEP-FIELD-NORTH; LUMINOSITY FUNCTION; CATALOG;
REQUIREMENTS; CALIBRATION; EVOLUTION
AB We present an empirical method for estimating the underlying redshift distribution N(z) of galaxy photometric samples from photometric observables. The method does not rely on photometric redshift (photo-z) estimates for individual galaxies, which typically suffer from biases. Instead, it assigns weights to galaxies in a spectroscopic subsample such that the weighted distributions of photometric observables (e.g. multiband magnitudes) match the corresponding distributions for the photometric sample. The weights are estimated using a nearest neighbour technique that ensures stability in sparsely populated regions of colour-magnitude space. The derived weights are then summed in redshift bins to create the redshift distribution. We apply this weighting technique to data from the Sloan Digital Sky Survey as well as to mock catalogues for the Dark Energy Survey, and compare the results to those from the estimation of photo-zs derived by a neural network algorithm. We find that the weighting method accurately recovers the underlying redshift distribution, typically better than the photo-z reconstruction, provided the spectroscopic subsample spans the range of photometric observables covered by the photometric sample.
C1 [Lima, Marcos] Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
[Lima, Marcos; Cunha, Carlos E.; Oyaizu, Hiroaki; Frieman, Joshua] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
[Cunha, Carlos E.; Oyaizu, Hiroaki; Frieman, Joshua] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
[Frieman, Joshua; Lin, Huan] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
[Sheldon, Erin S.] NYU, Ctr Cosmol & Particle Phys, New York, NY 10003 USA.
[Sheldon, Erin S.] NYU, Dept Phys, New York, NY 10003 USA.
RP Lima, M (reprint author), Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
EM mvlima@uchicago.edu
RI Lima, Marcos/E-8378-2010
FU KICP [PHY-0114422]; NSF [PHY-0551142, AST-0239759, AST-0507666,
AST-0708154, AST95-09298, AST-0071048, AST-0071198, AST-0507428,
AST-0507483]; University of Chicago; DOE [DE-AC02-07CH11359]; Alfred P.
Sloan Foundation; NASA [NNG04GC89G]
FX We would like to thank Dinoj Surendran and Mark SubbaRao for useful
discussions about nearest neighbour search methods and for introducing
the authors to a fast algorithm using Cover-Trees. This work was
supported by the KICP under NSF No. PHY-0114422 and NSF PHY-0551142, by
NSF grants AST-0239759, AST-0507666 and AST-0708154 at the University of
Chicago, by the DOE at the University of Chicago and Fermilab and by DOE
contract number DE-AC02-07CH11359.; Funding for the SDSS and SDSS-II has
been provided by the Alfred P. Sloan Foundation, the Participating
Institutions, the National Science Foundation, the US 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.; Funding for the DEEP2 survey has been
provided by NSF grants AST95-09298, AST-0071048, AST-0071198,
AST-0507428 and AST-0507483 as well as NASA LTSA grant NNG04GC89G.; Some
of the data presented herein were obtained at the W. M. Keck
Observatory, which is operated as a scientific partnership among the
California Institute of Technology, the University of California and the
National Aeronautics and Space Administration. The observatory was made
possible by the generous financial support of the W. M. Keck Foundation.
The DEEP2 team and Keck Observatory acknowledge the very significant
cultural role and reverence that the summit of Mauna Kea has always had
within the indigenous Hawaiian community and appreciate the opportunity
to conduct observations from this mountain.
NR 31
TC 45
Z9 45
U1 0
U2 1
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD OCT 11
PY 2008
VL 390
IS 1
BP 118
EP 130
DI 10.1111/j.1365-2966.2008.13510.x
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 367BZ
UT WOS:000260528800030
ER
PT J
AU Esposito, P
Israel, GL
Zane, S
Senziani, F
Starling, RLC
Rea, N
Palmer, DM
Gehrels, N
Tiengo, A
De Luca, A
Gotz, D
Mereghetti, S
Romano, P
Sakamoto, T
Barthelmy, SD
Stella, L
Turolla, R
Feroci, M
Mangano, V
AF Esposito, P.
Israel, G. L.
Zane, S.
Senziani, F.
Starling, R. L. C.
Rea, N.
Palmer, D. M.
Gehrels, N.
Tiengo, A.
De Luca, A.
Goetz, D.
Mereghetti, S.
Romano, P.
Sakamoto, T.
Barthelmy, S. D.
Stella, L.
Turolla, R.
Feroci, M.
Mangano, V.
TI The 2008 May burst activation of SGR 1627-41
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE stars: neutron; X-rays: bursts; X-rays: individual: SGR 1627-41
ID SOFT GAMMA REPEATER; X-RAY-EMISSION; LOCALIZATION; SGR-1900+14; PULSARS;
HETE-2
AB In 2008 May, the soft gamma-ray repeater (SGR) SGR 1627-41 resumed its bursting activity after nearly a decade of quiescence. After detection of a bright burst, Swift pointed its X-ray telescope in the direction of the source in less than five hours and followed it for over five weeks. In this Letter, we present an analysis of the data from these Swift observations and an XMM-Newton one performed when SGR 1627-41 was still in a quiescent state. The analysis of the bursts detected with Swift/Burst Alert Telescope shows that their temporal and spectral properties are similar to those found in previous observations of SGR 1627-41 and other SGRs. The maximum peak luminosity of the bursts was similar to 2 x 10(41) erg s(-1). Our data show that the outburst was accompanied by a fast flux enhancement and by a hardening of the spectrum with respect to the persistent emission.
C1 [Esposito, P.; De Luca, A.] Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy.
[Esposito, P.; De Luca, A.] Univ Pavia, INFN Pavia, I-27100 Pavia, Italy.
[Esposito, P.; Senziani, F.; Tiengo, A.; De Luca, A.; Mereghetti, S.] INAF Ist Astrofis Spaziale & Fis Cosm Milano, I-20133 Milan, Italy.
[Israel, G. L.; Stella, L.] Osserv Astron Roma, INAF, I-00040 Monte Porzio Catone, Italy.
[Zane, S.; Turolla, R.] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England.
[Senziani, F.] IUSS, I-27100 Pavia, Italy.
[Starling, R. L. C.] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England.
[Rea, N.] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands.
[Palmer, D. M.; Sakamoto, T.; Barthelmy, S. D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Gehrels, N.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Goetz, D.] CEA Saclay, DSM Irfu Serv Astrophys, F-91191 Gif Sur Yvette, France.
[Romano, P.; Mangano, V.] INAF Ist Astrofis Spaziale & Fis Cosm Palermo, I-90146 Palermo, Italy.
[Turolla, R.] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
[Feroci, M.] INAF Ist Astrofis Spaziale & Fis Cosm Roma, I-00133 Rome, Italy.
RP Esposito, P (reprint author), Univ Pavia, Dipartimento Fis Nucl & Teor, Via A Bassi 6, I-27100 Pavia, Italy.
EM paoloesp@iasf-milano.inaf.it
RI Barthelmy, Scott/D-2943-2012; Gehrels, Neil/D-2971-2012; Rea,
Nanda/I-2853-2015;
OI Rea, Nanda/0000-0003-2177-6388; Tiengo, Andrea/0000-0002-6038-1090;
Feroci, Marco/0000-0002-7617-3421; MEREGHETTI,
SANDRO/0000-0003-3259-7801; Israel, GianLuca/0000-0001-5480-6438; De
Luca, Andrea/0000-0001-6739-687X; Esposito, Paolo/0000-0003-4849-5092
FU ASI/INAF [I/088/06/0, AAE TH-058]; STFC; NWO Veni; CNES
FX This research is based on observations with the NASA/UK/ASI Swift
mission. We thank the Swift duty scientists and science planners for
making these observations possible. We also used data obtained with
XMM-Newton, an ESA science mission with instruments and contributions
directly funded by ESA Member States and NASA. The Italian authors
acknowledge the partial support from ASI (ASI/INAF contracts I/088/06/0
and AAE TH-058). SZ and RLCS acknowledge support from STFC. NR is
supported by an NWO Veni Fellowship. DG acknowledges the CNES for
financial support.
NR 32
TC 34
Z9 34
U1 0
U2 1
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
EI 1365-2966
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD OCT 11
PY 2008
VL 390
IS 1
BP L34
EP L38
DI 10.1111/j.1745-3933.2008.00530.x
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 367BZ
UT WOS:000260528800008
ER
PT J
AU Plaster, B
Carr, R
Filippone, BW
Harrison, D
Hsiao, J
Ito, TM
Liu, J
Martin, JW
Tipton, B
Yuan, J
AF Plaster, B.
Carr, R.
Filippone, B. W.
Harrison, D.
Hsiao, J.
Ito, T. M.
Liu, J.
Martin, J. W.
Tipton, B.
Yuan, J.
TI A solenoidal electron spectrometer for a precision measurement of the
neutron beta-asymmetry with ultracold neutrons
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE Neutron beta-decay; Low-energy electron magnetic spectrometer; Ultracold
neutrons
ID LOW-ENERGY; DECAY; TESTS; BACKSCATTERING; MODEL
AB We describe an electron spectrometer designed for a precision measurement of the neutron beta-asymmetry with spin-polarized ultracold neutrons. The spectrometer consists of a 1.0-T solenoidal Held with two identical multiwire proportional chamber and plastic scintillator electron detector packages situated within 0.6-T field-expansion regions, Select results from performance studies of the spectrometer with calibration sources are reported. (C) 2008 Elsevier B.V. All rights reserved.
C1 [Plaster, B.] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
[Plaster, B.; Carr, R.; Filippone, B. W.; Hsiao, J.; Ito, T. M.; Liu, J.; Martin, J. W.; Tipton, B.; Yuan, J.] CALTECH, WK Kellogg Radiat Lab, Pasadena, CA 91125 USA.
[Harrison, D.; Martin, J. W.] Univ Winnipeg, Dept Phys, Winnipeg, MB R3B 2E9, Canada.
[Ito, T. M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Plaster, B (reprint author), Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
EM plaster@pa.uky.edu
RI Yuan, Junhua/C-7923-2009;
OI Ito, Takeyasu/0000-0003-3494-6796
FU National Science Foundation [PHY-0079767, PHY-0244899, PHY-0555674];
Natural Sciences and Engineering Research Council of Canada
FX We thank R. Cortez and J. Pendlay for their skillful technical
contributions to the design, fabrication, and deployment of the detector
systems. We thank S. Currie for his devoted efforts to the operation and
maintenance of the helium liquefaction plant. We thank the entire UCNA
collaboration for many valuable suggestions. This work was supported in
part by the National Science Foundation under grant numbers PHY-0079767
(a Major Research Instrumentation Program grant), PHY-0244899,
PHY-0555674, and also by the Natural Sciences and Engineering Research
Council of Canada.
NR 24
TC 15
Z9 15
U1 1
U2 2
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 OCT 11
PY 2008
VL 595
IS 3
BP 587
EP 598
DI 10.1016/j.nima.2008.07.143
PG 12
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 374FM
UT WOS:000261028600007
ER
PT J
AU Huber, T
Hurth, T
Lunghi, E
AF Huber, Tobias
Hurth, Tobias
Lunghi, Enrico
TI Logarithmically enhanced corrections to the decay rate and
forward-backward asymmetry in (B)over-bar -> X(s)l(+)l(-)
SO NUCLEAR PHYSICS B
LA English
DT Article
DE B physics; rare decays
ID DILEPTON INVARIANT MASS; UB-VERTICAL-BAR; RARE B-DECAYS; STANDARD MODEL;
B->X(S)L(+)L(-)
AB We study logarithmically enhanced electromagnetic corrections to the decay rate in the high dilepton invariant mass region as well as corrections to the forward-backward asymmetry (FBA) of the inclusive rare decay (B) over bar -> X(s)l(+)l(-). As expected, the relative effect of these corrections in the high dilepton mass region is around -8% for the muonic final state and therefore much larger than in the low dilepton mass region. We also present a complete phenomenological analysis, to improved NNLO accuracy, of the dilepton mass spectrum and the FBA integrated in the low dilepton mass region, including a new approach to the zero of the FBA. The latter represents one of the most precise predictions in flavour physics with a theoretical uncertainty of order 5%. We find (q(0)(2))(mu mu) = (3.50 +/- 0.12) GeV2. For the high dilepton invariant mass region, we have B((B) over bar -> X-s mu mu)(high) = (2.40(-0.62)(+0.69)) x 10(-7) . The dominant uncertainty is due to the 1/m(b) corrections and can be significantly reduced in the future. For the low dilepton invariant mass region, we confirm previous results up to small corrections. (c) 2008 Elsevier B.V. All rights reserved.
C1 [Hurth, Tobias] CERN, Div Theory, Dept Phys, CH-1211 Geneva, Switzerland.
[Huber, Tobias] Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland.
[Huber, Tobias] Rhein Westfal TH Aachen, Inst Theoret Phys E, D-52056 Aachen, Germany.
[Hurth, Tobias] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
[Lunghi, Enrico] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Hurth, T (reprint author), CERN, Div Theory, Dept Phys, CH-1211 Geneva, Switzerland.
EM tobias.hurth@cern.ch
OI Huber, Tobias/0000-0002-3851-0116
NR 50
TC 63
Z9 63
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 OCT 11
PY 2008
VL 802
IS 1-2
BP 40
EP 62
DI 10.1016/j.nuclphysb.2008.04.028
PG 23
WC Physics, Particles & Fields
SC Physics
GA 334AH
UT WOS:000258194200002
ER
PT J
AU Seo, HJ
Siegel, ER
Eisenstein, DJ
White, M
AF Seo, Hee-Jong
Siegel, Ethan R.
Eisenstein, Daniel J.
White, Martin
TI Nonlinear structure formation and the acoustic scale
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE cosmological parameters; cosmology : theory; distance scale; large-scale
structure of universe; methods : n-body simulations
ID LUMINOUS RED GALAXIES; MICROWAVE BACKGROUND ANISOTROPY; ANGULAR POWER
SPECTRUM; PROBING DARK ENERGY; DIGITAL SKY SURVEY; BARYON OSCILLATIONS;
REDSHIFT SURVEYS; PERTURBATION-THEORY; ANALYTIC APPROACH; REAL-SPACE
AB We present high signal-to-noise ratio measurements of the acoustic scale in the presence of nonlinear growth and redshift distortions using 320 h(-3) Gpc(3) of cosmological particle-mesh simulations. Using simple fitting methods, we obtain robust measurements of the acoustic scale with scatter close to that predicted by the Fisher matrix. We detect and quantify the shift in the acoustic scale by analyzing the power spectrum: we detect at greater than 5 sigma a decrease in the acoustic scale in the real-space matter power spectrum of 0.2% at z = 1.5, growing to 0.45% at z = 0.3. In redshift space, the shifts are about 25% larger: we detect a decrease of 0.25% at z = 1.5 and 0.54% at z = 0.3. Despite the nonzero amounts, these shifts are highly predictable numerically, and hence removable within the standard ruler analysis of clustering data. Moreover, we show that a simple density field reconstruction method substantially reduces the scatter and nonlinear shifts of the acoustic scale measurements: the shifts are reduced to less than 0.1% at z = 0.3-1.5, even in the presence of nonnegligible shot noise. Finally, we show that the ratio of the cosmological distance to the sound horizon that would be inferred from these fits is robust to variations in the parameterization of the fitting method and reasonable differences in the template cosmology.
C1 [Seo, Hee-Jong] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
[Seo, Hee-Jong; Siegel, Ethan R.; Eisenstein, Daniel J.] Univ Arizona, Steward Observ, Tucson, AZ 85121 USA.
[White, Martin] Univ Calif Berkeley, Dept Phys & Astron, Berkeley, CA 94720 USA.
[White, Martin] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Seo, HJ (reprint author), Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, POB 500, Batavia, IL 60510 USA.
EM sheejong@fnal.gov; ethan@as.arizona.edu; deisenstein@as.arizona.edu;
mwhite@berkeley.edu
RI White, Martin/I-3880-2015
OI White, Martin/0000-0001-9912-5070
FU DOE; NASA [NNX07AH11G, NNX07AC51G]; NSF [AST 07-07725]
FX We thank Martin Crocce for useful conversations. H.-J.S. is supported by
the DOE at Fermilab. E.R.S., D.J.E., and M. W. were supported by NASA
grant NNX07AH11G. E. R.S. and D.J.E. were supported by NASA grant
NNX07AC51G and NSF AST 07-07725. The simulations reported here used
resources at the National Energy Research Supercomputing Center.
NR 86
TC 58
Z9 58
U1 0
U2 2
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 OCT 10
PY 2008
VL 686
IS 1
BP 13
EP 24
DI 10.1086/589921
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 357BV
UT WOS:000259822200002
ER
PT J
AU Tinker, JL
Conroy, C
Norberg, P
Patiri, SG
Weinberg, DH
Warren, MS
AF Tinker, Jeremy L.
Conroy, Charlie
Norberg, Peder
Patiri, Santiago G.
Weinberg, David H.
Warren, Michael S.
TI Void statistics in large galaxy redshift surveys: Does halo occupation
of field galaxies depend on environment?
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE cosmology : theory; galaxies : halos; large-scale structure of universe
ID DIGITAL-SKY-SURVEY; LARGE-SCALE STRUCTURE; DARK-MATTER HALOES; PAIRWISE
VELOCITY DISPERSION; MARKED CORRELATION-FUNCTION; LUMINOSITY DEPENDENCE;
POWER-SPECTRUM; COSMIC VOIDS; DATA RELEASE; BIAS
AB We use measurements of the projected galaxy correlation function w(p)(r(p)) and galaxy void statistics to test whether the galaxy content of halos of fixed mass is systematically different in low-density environments. We present new measurements of the void probability function (VPF) and underdensity probability function (UPF) from Data Release 4 of the Sloan Digital Sky Survey (SDSS), as well as new measurements from the Two-Degree Field Galaxy Redshift Survey. We compare these measurements to predictions calculated from models of the halo occupation distribution ( HOD) that are constrained to match both the projected correlation function wp( rp) and the space density of galaxies ng. The standard implementation of the HOD assumes that galaxy occupation depends on halo mass only, and is independent of local environment. For luminosity-defined samples, we find that the standard HOD prediction is a good match to the observations, and the data exclude models in which galaxy formation efficiency is reduced in low-density environments. More remarkably, we find that the void statistics of red and blue galaxies (at L similar to 0: 4L(*)) are perfectly predicted by standard HOD models matched to the correlation function of these samples, ruling out "assembly bias'' models in which galaxy color is correlated with large-scale environment at fixed halo mass. We conclude that the luminosity and color of field galaxies are determined predominantly by the mass of the halo in which they reside and have little direct dependence on the environment in which the host halo formed. In broader terms, our results show that the sizes and emptiness of voids found in the distribution of L greater than or similar to 2L(*) galaxies are in excellent agreement with the predictions of a standard cosmological model with a simple connection between galaxies and dark matter halos.
C1 [Tinker, Jeremy L.; Conroy, Charlie] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
[Tinker, Jeremy L.] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
[Conroy, Charlie] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
[Norberg, Peder] Univ Edinburgh, Inst Astron, Edinburgh EH19 3HJ, Midlothian, Scotland.
[Patiri, Santiago G.] Inst Astrofis Canarias, Tenerife 38200, Spain.
[Weinberg, David H.] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
[Warren, Michael S.] Los Alamos Natl Labs, Los Alamos, NM 87545 USA.
RP Tinker, JL (reprint author), Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
OI Warren, Michael/0000-0002-1218-7904
FU NSF [AST-0407125]; US Department of Energy [W-7405-ENG-36]
FX The authors wish to thank Darren Croton, Brant Robertson, Ravi Sheth,
Michael Vogeley, RisaWechsler, Martin White, and Andrew Zentner for many
useful discussions. J. L. T. acknowledges the use of the computing
facilities of the Department of Astronomy at The Ohio State University.
J. L. T. would also like to acknowledge the generous hospitality of the
Institute for Computational Cosmology at the University of Durham, where
part of this work was completed. D. W. acknowledges the support of NSF
grant AST- 0407125. Portions of this work were performed under the
auspices of the US Department of Energy and were supported by its
contract W-7405-ENG-36 to Los Alamos National Laboratory (LANL).
Computational resources were provided by the LANL open supercomputing
initiative. C. C. thanks the Instituto de Astrofisica de Andalucia
(CSIC) for their wonderful espresso bar and financial support in the
spring of 2006.
NR 85
TC 56
Z9 56
U1 0
U2 3
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD OCT 10
PY 2008
VL 686
IS 1
BP 53
EP 71
DI 10.1086/589983
PG 19
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 357BV
UT WOS:000259822200005
ER
PT J
AU Lee, SH
Kamae, T
Ellison, DC
AF Lee, Shiu-Hang
Kamae, Tuneyoshi
Ellison, Donald C.
TI Three-dimensional model of broadband emission from supernova remnants
undergoing nonlinear diffusive shock acceleration
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE acceleration of particles; cosmic rays; gamma rays : observations;
supernova remnants; X-rays : general
ID GAMMA-RAY EMISSION; MAGNETIC-FIELD AMPLIFICATION; VERY-HIGH-ENERGY; P-P
INTERACTION; PARTICLE-ACCELERATION; COSMIC-RAYS; ASTRONOMICAL
ENVIRONMENTS; RX J1713.7-3946; CASSIOPEIA-A; IC 443
AB We present a three-dimensional model of supernova remnants (SNRs) in which the hydrodynamical evolution of the remnant is modeled consistently with nonlinear diffusive shock acceleration occurring at the outer blast wave. The model includes particle escape and diffusion outside of the forward shock and particle interactions with arbitrary distributions of external ambient material, such as molecular clouds. We include synchrotron emission and cooling, bremsstrahlung radiation, neutral pion production, and inverse Compton (IC) and Coulomb energy loss. Broadband spectra have been calculated for typical parameters, including dense regions of gas external to a 1000 yr old SNR. In this paper, we describe the details of our model, but do not attempt a detailed fit to any specific remnant. We also do not include magnetic field amplification (MFA), even though this effect may be important in some young remnants. Our aim is to develop a flexible platform that can be generalized to include effects such as MFA, and that can be easily adapted to various SNR environments, including Type Ia SNRs, which explode in a constant-density medium, and Type II SNRs, which explode in a presupernova wind. When applied to a specific SNR, our model will predict cosmic-ray spectra and multiwavelength morphology in projected images for instruments with varying spatial and spectral resolutions. We show examples of these spectra and images and emphasize the importance of measurements in the hard X-ray, GeV, and TeV gamma-ray bands for investigating key ingredients in the acceleration mechanism, and for deducing whether or not TeV emission is produced by IC from electrons or pion decay from protons.
C1 [Lee, Shiu-Hang; Kamae, Tuneyoshi] Stanford Univ, Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
[Lee, Shiu-Hang; Kamae, Tuneyoshi] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Menlo Pk, CA 94025 USA.
[Ellison, Donald C.] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA.
RP Lee, SH (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
EM kamae@slac.stanford.edu; shia520@slac.stanford.edu; don_ellison@ncsu.edu
FU NASAATP [06-ATP06-21]; NASA LTSA [(NNH04Zss001N- LTSA]; US Department of
Energy [DE-AC02-76SF00515]
FX The authors wish to thank Roger Blandford, Steven Kahn, Igor Moskalenko,
Niklas Karlsson, Stefan Funk, Takaaki Tanaka, Johan- Cohen Tanugi, and
Masaru Ueno for helpful discussions. They are grateful to the anonymous
referee for bringing new publications to their attention. D. C. E. is
grateful for the hospitality of KIPAC, where part of this work was done,
as well as for support from a NASAATP grant (06-ATP06-21) and a NASA
LTSA grant (NNH04Zss001N- LTSA). This work was supported in part by the
US Department of Energy under grant DE-AC02-76SF00515.
NR 47
TC 22
Z9 22
U1 0
U2 2
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 OCT 10
PY 2008
VL 686
IS 1
BP 325
EP 336
DI 10.1086/591308
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 357BV
UT WOS:000259822200025
ER
PT J
AU Greenhill, LJ
Tilak, A
Madejski, G
AF Greenhill, Lincoln J.
Tilak, Avanti
Madejski, Grzegorz
TI PREVALENCE OF HIGH X-RAY OBSCURING COLUMNS AMONG AGNs THAT HOST H2O
MASERS
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE accretion, accretion disks; galaxies: active; galaxies: nuclei; masers;
radio lines: ISM; X-rays: galaxies
ID ACTIVE GALACTIC NUCLEI; NEARBY SEYFERT-GALAXIES; XMM-NEWTON; ACCRETION
DISK; WATER MASER; EMISSION; PARSEC; OBSCURATION; LUMINOSITY; MEGAMASER
AB Of 104 AGNs known to exhibit H2O maser emission, X-ray data that enable estimation of column densities, or lower limits, are available for 42. Contributing to this, we report analysis of new and archival X-ray data for eight galaxies and collation of values for three more. Maser emission is indicative of large columns of cold gas, and in five of the eight new cases, maser spectra point toward origins in accretion disks viewed close to edge-on (a.k.a. "disk maser" systems). In these, we detect hard continuum and Fe K alpha emission with equivalent widths on the order of 1 keV, which is consistent with Compton reflection, fluorescence by cold material, and obscuring columns greater than or similar to 10(24) cm(-2). Reviewing the full sample of 42, 95% N-H > 10(23) cm(-2) and 60% exhibit N-H > 10(24) cm(-2). Half of these are now recognized to be disk masers (up from 13); in this subsample, which is likely to be more homogeneous vis-a-vis the origin of maser emission, 76% exhibit N-H > 10(24) cm(-2). The probability of a common parent distribution of columns for disk masers and other AGN masers is less than or similar to 3%. Because ground-based surveys of AGNs to detect new disk masers are relatively unbiased with respect to X-ray brightness and comparatively inexpensive, they may also be efficient guides for the sensitive pointed X-ray observations required to identify Compton-thick objects outside of shallow surveys.
C1 [Greenhill, Lincoln J.; Tilak, Avanti] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Madejski, Grzegorz] Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
[Madejski, Grzegorz] Kavli Inst Astrophys & Cosmol, Menlo Pk, CA 94025 USA.
RP Greenhill, LJ (reprint author), Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
EM greenhill@cfa.harvard.edu
FU NASA [NNG05GK24G]; DoE [DE-AC3-76SF00515]
FX We thank A. Fruscione for help with data reduction and M. Elvis, A.
Siemiginowska, and B. Wilkes for useful discussions. This research made
extensive use of the NASA/IPAC Extragalactic Database and the NASA
Astrophysical Data System Bibliographic Services. This work was
supported in part by NASA grant NNG05GK24G and DoE contract to SLAC No.
DE-AC3-76SF00515.
NR 32
TC 36
Z9 37
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD OCT 10
PY 2008
VL 686
IS 1
BP L13
EP L16
DI 10.1086/592782
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 398KO
UT WOS:000262731200004
ER
PT J
AU Bystroff, C
Webb-Robertson, BJ
AF Bystroff, Christopher
Webb-Robertson, Bobbie-Jo
TI Pairwise covariance adds little to secondary structure prediction but
improves the prediction of non-canonical local structure
SO BMC BIOINFORMATICS
LA English
DT Article
ID CORRELATED MUTATIONS; PROTEIN STRUCTURES; SEQUENCE; LIBRARY; MOTIFS
AB Background: Amino acid sequence probability distributions, or profiles, have been used successfully to predict secondary structure and local structure in proteins. Profile models assume the statistical independence of each position in the sequence, but the energetics of protein folding is better captured in a scoring function that is based on pairwise interactions, like a force field.
Results: I-sites motifs are short sequence/structure motifs that populate the protein structure database due to energy-driven convergent evolution. Here we show that a pairwise covariant sequence model does not predict alpha helix or beta strand significantly better overall than a profile-based model, but it does improve the prediction of certain loop motifs. The finding is best explained by considering secondary structure profiles as multivariant, all-or-none models, which subsume covariant models. Pairwise covariance is nonetheless present and energetically rational. Examples of negative design are present, where the covariances disfavor non-native structures.
Conclusion: Measured pairwise covariances are shown to be statistically robust in cross-validation tests, as long as the amino acid alphabet is reduced to nine classes. An updated I-sites local structure motif library that provides sequence covariance information for all types of local structure in globular proteins and a web server for local structure prediction are available at http://www.bioinfo.rpi.edu/bystrc/hmmstr/server.php.
C1 [Bystroff, Christopher] Rensselaer Polytech Inst, Dept Biol, Ctr Biotechnol & Interdisciplinary Studies, Troy, NY 12180 USA.
[Bystroff, Christopher] Rensselaer Polytech Inst, Dept Comp Sci, Ctr Biotechnol & Interdisciplinary Studies, Troy, NY 12180 USA.
[Webb-Robertson, Bobbie-Jo] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Bystroff, C (reprint author), Rensselaer Polytech Inst, Dept Biol, Ctr Biotechnol & Interdisciplinary Studies, Troy, NY 12180 USA.
EM bystrc@rpi.edu; bobbie-jo.webb-robertson@pnl.gov
FU NSF [DBI-0448072]; Data-Intensive Computing Initiative; U. S. Department
of Energy [DE-AC06-76RLO 1830]
FX Funding for this work was provided by NSF grant DBI-0448072 to C. B.
Funding to B. W for this work was provided by the Data-Intensive
Computing Initiative with the Laboratory Directed Research and
Development program at the Pacific Northwest National Laboratory (PNNL).
PNNL is a multi-program national laboratory operated by Battelle for the
U. S. Department of Energy under contract DE-AC06-76RLO 1830.
NR 15
TC 1
Z9 1
U1 0
U2 1
PU BIOMED CENTRAL LTD
PI LONDON
PA 236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND
SN 1471-2105
J9 BMC BIOINFORMATICS
JI BMC Bioinformatics
PD OCT 10
PY 2008
VL 9
AR 429
DI 10.1186/1471-2105-9-429
PG 10
WC Biochemical Research Methods; Biotechnology & Applied Microbiology;
Mathematical & Computational Biology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
Mathematical & Computational Biology
GA 372GP
UT WOS:000260890400001
PM 18847485
ER
EF