FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Downing, KH McCartney, MR Glaeser, RM AF Downing, KH McCartney, MR Glaeser, RM TI Experimental characterization and mitigation of specimen charging on thin films with one conducting layer SO MICROSCOPY AND MICROANALYSIS LA English DT Article; Proceedings Paper CT Topical Conference on Microbeam Characterization of Nonconductive Materials CY AUG 02-03, 2002 CL McGill Univ, Dept Min, Met & Mat Engn, Montreal, CANADA HO McGill Univ, Dept Min, Met & Mat Engn DE specimen charging; thin films; cryomicroscopy; electron crystallography ID ELECTRON CRYOMICROSCOPY AB Specimen charging may be one of the most significant factors that contribute to the high variability and generally low quality of images in cryo-electron microscopy. Understanding the nature of specimen charging, can help in devising, methods to reduce or even avoid its effects and thus improve the rate of data collection as well as the quality of the data. We describe a series of experiments that help to characterize the charging phenomenon, which has been termed the Berriman effect. The pattern of buildup and disappearance of the charge pattern has led to several suggestions for how to alleviate the effect. Experiments are described that demonstrate the feasibility of such charge mitigation. C1 Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. Arizona State Univ, Ctr Solid State Sci, Tempe, AZ 85287 USA. Univ Calif Berkeley, Stanley Donner ASU, Dept Mol & Cell Biol, Berkeley, CA 94720 USA. RP Downing, KH (reprint author), Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. EM KHDowling@lbl.gov FU NIGMS NIH HHS [GM51487] NR 9 TC 21 Z9 21 U1 0 U2 5 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH ST, NEW YORK, NY 10011-4211 USA SN 1431-9276 J9 MICROSC MICROANAL JI Microsc. microanal. PD DEC PY 2004 VL 10 IS 6 BP 783 EP 789 DI 10.1017/S143192760404067X PG 7 WC Materials Science, Multidisciplinary; Microscopy SC Materials Science; Microscopy GA 874TG UT WOS:000225372100015 PM 19780320 ER PT J AU Glaeser, RM Downing, KH AF Glaeser, RM Downing, KH TI Specimen charging on thin films with one conducting layer: Discussion of physical principles SO MICROSCOPY AND MICROANALYSIS LA English DT Article; Proceedings Paper CT Topical Conference on Microbeam Characterization of Nonconductive Materials CY AUG 02-03, 2002 CL McGill Univ, Dept Min, Met & Mat Engn, Montreal, CANADA HO McGill Univ, Dept Min, Met & Mat Engn DE charging; resolution; transmission electron microscopy ID TRANSMISSION ELECTRON-MICROSCOPY; CRYOMICROSCOPY AB Although the most familiar consequences of specimen charging in transmission electron microscopy can be eliminated by evaporating a thin conducting film (such as a carbon film) onto an insulating specimen or by preparing samples directly on such a conducting film to begin with, a more subtle charging effect still remains. We argue here that specimen charging is in this case likely to produce a dipole sheet rather than a layer of positive charge at the surface of the specimen. A simple model of the factors that control the kinetics of specimen charging, and its neutralization, is discussed as a guide for experiments that attempt to minimize the amount of specimen charging. Believable estimates of the electrostatic forces and the electron optical disturbances that are likely to occur suggest that specimen bending and warping may have the biggest impact on degrading the image quality at high resolution. Electron optical effects are likely to be negligible except in the case of a specimen that is tilted to high angle. A model is proposed to explain how both the mechanical and electron-optical effects of forming a dipole layer would have much greater impact on the image resolution in a direction perpendicular to the tilt axis, a well-known effect in electron microscopy of two-dimensional crystals. C1 Univ Calif Berkeley, Dept Mol & Cell Biol, Stanley Donner ASU, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. RP Glaeser, RM (reprint author), Univ Calif Berkeley, Dept Mol & Cell Biol, Stanley Donner ASU, Berkeley, CA 94720 USA. EM rmglaeser@lbl.gov FU NIGMS NIH HHS [GM51487] NR 9 TC 33 Z9 33 U1 1 U2 10 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH ST, NEW YORK, NY 10011-4211 USA SN 1431-9276 J9 MICROSC MICROANAL JI Microsc. microanal. PD DEC PY 2004 VL 10 IS 6 BP 790 EP 796 DI 10.1017/S1431927604040668 PG 7 WC Materials Science, Multidisciplinary; Microscopy SC Materials Science; Microscopy GA 874TG UT WOS:000225372100016 PM 19780321 ER PT J AU Divan, R Mancini, DC Gallagher, SM Booske, J Van der Weide, D AF Divan, R Mancini, DC Gallagher, SM Booske, J Van der Weide, D TI Improvements in graphite-based X-ray mask fabrication for ultradeep X-ray lithography SO MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS LA English DT Article; Proceedings Paper CT 5th International Workshop on Micro-Structure Technology CY JUN, 2003 CL Monterey, CA ID ADVANCED PHOTON SOURCE; DEEP AB Hard x-ray masks for ultradeep x-ray lithography (UDXRL) at synchrotron radiation sources, such as the Advanced Photon Source, require a gold absorber thickness of 20-100 mum on a low-Z substrate, such as silicon, graphite, or beryllium. Graphite sheets of 0.5 mm were used for the fabrication of x-ray masks by standard optical lithography using a SU-8 photoresist. The conductivity of graphite is sufficient to perform electroplating directly without the need for a metal-plating base layer. Gold electroforming was used to deposit a 85-mum-thick patterned absorber layer. The masks were used for UDXRL using hard x-rays at the Advanced Photon Source. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Univ Wisconsin, Dept Mech Engn, Madison, WI 53706 USA. Univ Wisconsin, Dept Elect & Comp Engn, Madison, WI 53706 USA. RP Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. NR 16 TC 4 Z9 4 U1 0 U2 1 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0946-7076 EI 1432-1858 J9 MICROSYST TECHNOL JI Microsyst. Technol. PD DEC PY 2004 VL 10 IS 10 BP 728 EP 734 DI 10.1007/s00542-004-0445-9 PG 7 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Science & Technology - Other Topics; Materials Science; Physics GA 888NT UT WOS:000226382200010 ER PT J AU Gallagher, KG Milligan, BG White, PS AF Gallagher, KG Milligan, BG White, PS TI Isolation and characterization of microsatellite DNA loci in Aquilegia sp. SO MOLECULAR ECOLOGY NOTES LA English DT Article DE Aquilegia; microsatellite; PCR; primer; SSR; STR AB We obtained a microsatellite-enriched genomic library isolated from the tissue of a single columbine (Aquilegia sp.) plant taken from a southwestern USA natural population. The primers developed for these microsatellite loci performed consistently in polymerase chain reactions and yielded multiallelic genotypes with relatively high observed heterozygosities. We describe polymerase chain reaction primers and conditions to amplify 16 unique, codominant di-, tri- and tetra-nucleotide microsatellite DNA loci so that other population biology researchers using columbine natural populations as a model system may benefit. C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. New Mexico State Univ, Dept Biol, Las Cruces, NM 88003 USA. RP Gallagher, KG (reprint author), Univ Montpellier 2, Inst Sci Evolut, Pl Eugene Bataillon CC-65 Bat 22, F-34095 Montpellier 5, France. EM kelly@isem.univ-montp2.fr NR 7 TC 4 Z9 4 U1 0 U2 3 PU BLACKWELL PUBLISHING LTD PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DG, OXON, ENGLAND SN 1471-8278 J9 MOL ECOL NOTES JI Mol. Ecol. Notes PD DEC PY 2004 VL 4 IS 4 BP 686 EP 688 DI 10.1111/j.1471-8286.2004.00785.x PG 3 WC Biochemistry & Molecular Biology; Ecology; Evolutionary Biology SC Biochemistry & Molecular Biology; Environmental Sciences & Ecology; Evolutionary Biology GA 876KV UT WOS:000225496600047 ER PT J AU Zhang, PJ Pen, UL Trac, H AF Zhang, PJ Pen, UL Trac, H TI The temperature of the intergalactic medium and the Compton y parameter SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article ID SUNYAEV-ZELDOVICH FLUCTUATIONS; POWER SPECTRUM; COSMOLOGICAL PARAMETERS; SIMULATIONS; GALAXIES; CLUSTERS; ANISOTROPY; MATTER; GAS; ALGORITHM AB The thermal Sunyaev-Zeldovich (SZ) effect directly probes the thermal energy of the Universe. Its precision modelling and future high-accuracy measurements will provide a powerful way to constrain the thermal history of the Universe. In this paper, we focus on the precision modelling of the gas density weighted temperature (T) over bar (g) and the mean SZ Compton y parameter. We run high-resolution adiabatic hydrodynamic simulations adopting the WMAP cosmology to study the temperature and density distribution of the intergalactic medium (IGM). To quantify possible simulation limitations, we run n=-1, -2 self-similar simulations. Our analytical model on (T) over bar (g) is based on energy conservation and matter clustering and has no free parameter. Combining both simulations and analytical models thus provides the precision modelling of (T) over bar (g) and (y) over bar. We find that the simulated temperature probability distribution function and (T) over bar (g) shows good convergence. For the WMAP cosmology, our highest-resolution simulation (1024(3) cells, 100 Mpc h(-1) box size) reliably simulates (T) over bar (g) with better than 10 per cent accuracy for zgreater than or similar to0.5. Toward z=0, the simulation mass-resolution effect becomes stronger and causes the simulated (T) over bar (g) to be slightly underestimated (at z=0, similar to20 per cent underestimated). Since (y) over bar is mainly contributed by the IGM at zgreater than or similar to0.5, this simulation effect on (y) over bar is no larger than similar to10 per cent. Furthermore, our analytical model is capable of correcting this artefact. It passes all tests of self-similar simulations and WMAP simulations and is able to predict (T) over bar (g) and (y) over bar to several per cent accuracy. For a low matter density LambdaCDM cosmology, the present (T) over bar (g) is 0.32 (sigma(8)/0.84)(3.05-0.15Omega m) (Omega(m)/0.268)(1.28-0.2sigma 8) keV, which accounts for 10(-8) of the critical cosmological density and 0.024 per cent of the cosmic microwave background (CMB) energy. The mean y parameter is 2.6x10(-6) (sigma(8)/0.84)(4.1-2Omega m)(Omega(m)/0.268)(1.28-0.2sigma 8). The current upper limit of y<1.5x10(-5) measured by FIRAS has already ruled out combinations of high sigma(8)greater than or similar to 1.1 and high Omega(m)greater than or similar to 0.5. C1 Fermilab Natl Accelerator Lab, NASA Fermilab Astrophys Grp, Batavia, IL 60510 USA. Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada. Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H8, Canada. RP Zhang, PJ (reprint author), Fermilab Natl Accelerator Lab, NASA Fermilab Astrophys Grp, POB 500, Batavia, IL 60510 USA. EM zhangpj@fnal.gov; pen@cita.utoronto.ca; trac@cita.utoronto.ca RI Trac, Hy/N-8838-2014; ZHANG, PENGJIE/O-2825-2015 OI Trac, Hy/0000-0001-6778-3861; NR 43 TC 20 Z9 20 U1 0 U2 0 PU BLACKWELL PUBLISHING LTD PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DG, OXON, ENGLAND SN 0035-8711 J9 MON NOT R ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD DEC 1 PY 2004 VL 355 IS 2 BP 451 EP 460 DI 10.1111/j.1365-2966.2004.08328.x PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 873FJ UT WOS:000225265000014 ER PT J AU Wingate, BA AF Wingate, BA TI The maximum allowable time step for the shallow water alpha model and its relation to time-implicit differencing SO MONTHLY WEATHER REVIEW LA English DT Article ID CAMASSA-HOLM EQUATIONS; SEMTNER OCEAN MODEL; TURBULENCE; CONNECTION; FLOW AB This work investigates the numerical time stability of the Lagrangian-averaged shallow water alpha model (SW-alpha). The main result is an analytical estimate for the maximum allowable time step. This estimate shows that as the grid is refined the time step becomes independent of the mesh spacing and instead depends on the length scale, alpha, a parameter of the model. The alpha model achieves this result through changes in the equations of motion that reduce the frequency of the linear waves at high wavenumbers. This type of reduction in the frequency of high-wavenumber waves is also a characteristic of time-implicit numerical methods. Consequently, an analogy is drawn between the two by comparing the numerical method's modified equation to the partial differential equation of the alpha model. Fourier analysis and numerical simulations are also used to compare a third-order Adams-Bashforth alpha model simulation to the well-known implicit numerical method of Dukowicz and Smith. C1 Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. RP Wingate, BA (reprint author), Los Alamos Natl Lab, Ctr Nonlinear Studies, MS B413, Los Alamos, NM 87545 USA. EM wingate@lanl.gov NR 21 TC 8 Z9 8 U1 0 U2 0 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 DEC PY 2004 VL 132 IS 12 BP 2719 EP 2731 DI 10.1175/MWR2816.1 PG 13 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 880RN UT WOS:000225807000001 ER PT J AU Boebinger, G Cox, DL Hurd, AJ Pines, D AF Boebinger, G Cox, DL Hurd, AJ Pines, D TI Up close: The Institute for Complex Adaptive Matter, an emergent institution SO MRS BULLETIN LA English DT Editorial Material C1 Los Alamos Natl Lab, ICAM, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Natl High Magnet Field Lab, Pulsed Magnet Field Facil, Los Alamos, NM 87545 USA. Univ Calif Davis, Dept Phys, Davis, CA USA. Univ Illinois, Urbana, IL 61801 USA. RP Boebinger, G (reprint author), Los Alamos Natl Lab, ICAM, Los Alamos, NM 87545 USA. NR 0 TC 1 Z9 1 U1 0 U2 1 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA SN 0883-7694 J9 MRS BULL JI MRS Bull. PD DEC PY 2004 VL 29 IS 12 BP 963 EP 966 DI 10.1557/mrs2004.268 PG 4 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA 881HO UT WOS:000225854200024 ER PT J AU Daiguji, H Yang, PD Szeri, AJ Majumdar, A AF Daiguji, H Yang, PD Szeri, AJ Majumdar, A TI Electrochemomechanical energy conversion in nanofluidic channels SO NANO LETTERS LA English DT Article ID STREAMING POTENTIAL MEASUREMENTS; MEMBRANES; FLOW; HYDRODYNAMICS; MICROCHANNEL; CONDUCTANCE; TRANSPORT AB When the Debye length is on the order of or larger than the height of a nanofluidic channel containing surface charge, a unipolar solution of counterions is generated to maintain electrical neutrality. A pressure-gradient-driven flow under such conditions can be used for ion separation, which forms the basis for electrochemomechanical energy conversion. The current-potential (I-phi) characteristics of such a battery were calculated using continuum dynamics. When the bulk concentration is large and the channel does not become a unipolar solution of counterions, both the current and potential become small. On the other hand, when bulk concentration is so much smaller, the mass diffusion becomes the rate-controlling step and the potential drops rapidly in the high current density region. When the Debye length of the solution is about half of the channel height, the efficiency is maximized. C1 Univ Tokyo, Inst Environm Studies, Grad Sch Frontier Sci, Tokyo 1130033, Japan. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA. RP Univ Tokyo, Inst Environm Studies, Grad Sch Frontier Sci, Tokyo 1130033, Japan. EM daiguji@k.u-tokyo.ac.jp RI Daiguji, Hirofumi/B-2098-2013; OI Szeri, Andrew/0000-0003-0407-2645 NR 22 TC 167 Z9 171 U1 9 U2 81 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1530-6984 EI 1530-6992 J9 NANO LETT JI Nano Lett. PD DEC PY 2004 VL 4 IS 12 BP 2315 EP 2321 DI 10.1021/nl0489945 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 878XS UT WOS:000225681300003 ER PT J AU Puzder, A Williamson, AJ Zaitseva, N Galli, G Manna, L Alivisatos, AP AF Puzder, A Williamson, AJ Zaitseva, N Galli, G Manna, L Alivisatos, AP TI The effect of organic ligand binding on the growth of CdSe nanoparticles probed by Ab initio calculations SO NANO LETTERS LA English DT Article ID QUANTUM DOTS; CORE/SHELL NANOCRYSTALS; ALTERNATIVE ROUTES; SHAPE-EVOLUTION; MONODISPERSE; MECHANISMS; CELLS AB First principles electronic structure simulations are used to study the atomistic detail of the interaction between organic surfactant molecules and the surfaces of Use semiconductor nanoparticles. These calculations provide insights into the relaxed atomic geometry of organics bound to semiconductor surfaces at the nanoscale as well as the electronic charge transfer between surface atoms and the organics. We calculate the binding energy of phosphine oxide, phosphonic and carboxylic acids, and amine ligands to a range of Use nanoparticle facets. The dominant binding interaction is between oxygen atoms in the ligands and cadmium atoms on the nanoparticle surfaces. The most strongly bound ligands are phosphonic acid molecules, which bind preferentially to the facets forming the sides of Use nanorods. The calculated relative binding strengths of ligands to different facets support the hypothesis that these binding energies control the relative growth rates of different facets, and therefore the resulting geometry of the nanoparticles. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Lawrence Berkeley Natl Lab, Berkeley, CA USA. RP Williamson, AJ (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM williamson10@llnl.gov RI Manna, Liberato/G-2339-2010; Alivisatos , Paul /N-8863-2015 OI Manna, Liberato/0000-0003-4386-7985; Alivisatos , Paul /0000-0001-6895-9048 NR 25 TC 204 Z9 207 U1 5 U2 81 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 DEC PY 2004 VL 4 IS 12 BP 2361 EP 2365 DI 10.1021/nl0485861 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 878XS UT WOS:000225681300010 ER PT J AU Liu, HT Alivisatos, AP AF Liu, HT Alivisatos, AP TI Preparation of asymmetric nanostructures through site selective modification of tetrapods SO NANO LETTERS LA English DT Article ID CDSE NANOCRYSTALS; HALF-SHELLS; GROWTH; NANOPARTICLES; DNA AB CdTe tetrapods have been deposited on a substrate and partially coated with a protective polymer layer, exposing just one arm. The exposed arm was then decorated with Au nanoparticles in a site selective fashion. The modified arms were readily broken off from the remainder of the tetrapods and released from the substrate, yielding CdTe nanorods asymmetrically modified with Au nanoparticles. These nanostructures with reduced symmetry may show interesting optoelectronic properties. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Alivisatos, AP (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM alivis@uclink.berkeley.edu RI Alivisatos , Paul /N-8863-2015 OI Alivisatos , Paul /0000-0001-6895-9048 NR 22 TC 63 Z9 66 U1 1 U2 20 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 DEC PY 2004 VL 4 IS 12 BP 2397 EP 2401 DI 10.1021/nl048532i 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 878XS UT WOS:000225681300017 ER PT J AU Gray, JL Atha, S Hull, R Floro, JA AF Gray, JL Atha, S Hull, R Floro, JA TI Hierarchical self-assembly of epitaxial semiconductor nanostructures SO NANO LETTERS LA English DT Article ID GROWTH; GE AB We describe a new route to hierarchical assembly of semiconductor nanostructures, employing guided organization of self-assembling epitaxial quantum dot molecules in the GexSi1-x/Si(100) system. The quantum dot molecule comprises a shallow strain relieving pit, defined by {105} facets, and bounded by 4-fold {105}-faceted islands. Through topographic "forcing functions" fabricated on the substrate surface, the quantum dot molecules may be organized into arrays, enabling hierarchical structures spanning length scales from tens of nanometers; to macroscopic dimensions. C1 Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Hull, R (reprint author), Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA. EM hull@virginia.edu NR 11 TC 31 Z9 31 U1 1 U2 19 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 DEC PY 2004 VL 4 IS 12 BP 2447 EP 2450 DI 10.1021/nl048443e 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 878XS UT WOS:000225681300026 ER PT J AU Thompson, RB Rasmussen, KO Lookman, T AF Thompson, RB Rasmussen, KO Lookman, T TI Origins of elastic properties in ordered block copolymer/nanoparticle composites SO NANO LETTERS LA English DT Article ID NANOPARTICLE COMPOSITES; MULTIBLOCK COPOLYMERS; MORPHOLOGY; MELTS; MODEL AB We predict a diblock copolymer melt in the lamellar phase with added spherical nanoparticles that have an affinity for one block to have a lower tensile modulus than a pure diblock copolymer system. This weakening is due to the swelling of the lamellar domain by nanoparticles and the displacement of polymer by elastically inert fillers. Despite the overall decrease in the tensile modulus of a polydomain sample, the shear modulus for a single domain is unaffected by fillers. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Thompson, RB (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM thompson@uwaterloo.ca RI Rasmussen, Kim/B-5464-2009; Thompson, Russell/J-6326-2012 OI Rasmussen, Kim/0000-0002-4029-4723; Thompson, Russell/0000-0002-6571-558X NR 21 TC 27 Z9 27 U1 1 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1530-6984 EI 1530-6992 J9 NANO LETT JI Nano Lett. PD DEC PY 2004 VL 4 IS 12 BP 2455 EP 2459 DI 10.1021/nl048407f 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 878XS UT WOS:000225681300028 ER PT J AU Kohli, S Theil, JA Dippo, PC Jones, KM Ai-Jassim, MM Ahrenkiel, RK Rithner, CD Dorhout, PK AF Kohli, S Theil, JA Dippo, PC Jones, KM Ai-Jassim, MM Ahrenkiel, RK Rithner, CD Dorhout, PK TI Nanocrystal formation in annealed a-SiO0.17N0.07 : H films SO NANOTECHNOLOGY LA English DT Article ID CHEMICAL-VAPOR-DEPOSITION; SI-H FILMS; SILICON OXYNITRIDE; POROUS SILICON; THIN-FILMS; X-RAY; LUMINESCENCE; PHOTOLUMINESCENCE; NANOCLUSTERS; FABRICATION AB Silicon nanocrystals have been fabricated by annealing amorphous hydrogenated silicon-rich oxynitride (SRON) films in vacuum for 4 h over the temperature range 850-1150degreesC. X-ray photoelectron spectroscopy confirmed the composition of the film to be SiO0.N-17(0).(07). Glancing angle x-ray diffraction results revealed consistent silicon crystallite sizes of similar to5 nm for films annealed at temperatures less than or equal to 1050degreesC, increasing to similar to12 nm for films annealed at 1150 degreesC. The room temperature photoluminescence spectra of the samples annealed at 850 and 950degreesC comprised luminescent peaks from silicon nanocrystals and luminescence from the defects in Si-O system. However, only peaks from defects in Si-O system were present in the luminescence spectra from samples annealed at temperatures greater than 950 degreesC. For the samples annealed at 850 and 950 degreesC, the presence of strong Si-N bonds prevented the coalescence of smaller silicon crystallites into larger crystallites. Larger, non-luminescent silicon crystallites were only formed in films annealed at temperatures greater than 950 degreesC, where the energetics of coalescing particles overcame the strong Si-N bonding in SRON films. High-resolution transmission electron microscopy analysis confirmed the presence of silicon nanocrystallites. A proposed growth mechanism of silicon nanocrystals is discussed. C1 Colorado State Univ, Dept Chem, Ft Collins, CO 80523 USA. Agilent Technol, Santa Clara, CA 95051 USA. Natl Renewable Energy Lab, Measurements & Characterizat Div, Golden, CO 80401 USA. RP Kohli, S (reprint author), Colorado State Univ, Dept Chem, Ft Collins, CO 80523 USA. EM skohli@lamar.colostate.edu NR 34 TC 25 Z9 27 U1 0 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0957-4484 J9 NANOTECHNOLOGY JI Nanotechnology PD DEC PY 2004 VL 15 IS 12 BP 1831 EP 1836 AR PII S0957-4484(04)83984-9 DI 10.1088/0957-4484/15/12/024 PG 6 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied SC Science & Technology - Other Topics; Materials Science; Physics GA 881DI UT WOS:000225843200024 ER PT J AU Saiz, E Tomsia, AP AF Saiz, E Tomsia, AP TI Atomic dynamics and Marangoni films during liquid-metal spreading SO NATURE MATERIALS LA English DT Article ID SURFACE-TENSION GRADIENTS; ALLOYS; SYSTEMS; ENERGY AB Despite its apparent simplicity, spreading of liquid metals at high temperatures has defied description and generalization. Wetting at high temperature is usually accompanied by interdiffusion and chemical reaction, but the forces that drive reactive spreading and the mechanisms that control its kinetics have been very poorly understood. The unsolved challenge has been to link macroscopic measurements such as the dynamic contact angle or the speed of a moving liquid front to phenomena occurring at the microscopic and even atomic level in the vicinity of the triple solid - liquid - vapour junction. We have taken a big step towards meeting this challenge. Our systematic analysis of the spreading of metal - metal systems with varying degrees of mutual solubility allows us to report on the fundamental differences between the mechanisms controlling spreading of organic liquids and liquid metals and on formation of Marangoni films driven by surface-tension gradients in high-temperature systems. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. EM Esaiz@lbl.gov NR 30 TC 82 Z9 83 U1 1 U2 28 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 1476-1122 EI 1476-4660 J9 NAT MATER JI Nat. Mater. PD DEC PY 2004 VL 3 IS 12 BP 903 EP 909 DI 10.1038/nmat1252 PG 7 WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA 875WP UT WOS:000225453200025 PM 15543152 ER PT J AU Dubrovsky, VA Matveev, KI AF Dubrovsky, VA Matveev, KI TI The influence of the weight of power systems on the performance of fast, long-range sealift ships with a small waterplane area SO NAVAL ENGINEERS JOURNAL LA English DT Article AB The development of fast, long-range ships is a vital and challenging task of modern naval engineering. In this paper, the combined weight of the ship's engines and fuel is considered as the key parameter in the design process. The inverse approach for designing such vessels is formulated, aimed at determining the achievable speed as a function of the total weight of a power system at fixed power and payload. Possible ship concepts are discussed, and one configuration of a ship with a small water-plane area is examined in detail. The application of the specific design methods pertinent to this ship type is presented. The dependence of achievable speed on the total weight of a power system is estimated. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Dubrovsky, VA (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 12 TC 0 Z9 1 U1 0 U2 0 PU AMER SOC NAVAL ENG INC PI ALEXANDRIA PA 1452 DUKE STREET, ALEXANDRIA, VA 22314-3458 USA SN 0028-1425 J9 NAV ENG J JI Nav. Eng. J. PD WIN PY 2004 VL 116 IS 1 BP 69 EP 78 PG 10 WC Engineering, Marine; Engineering, Civil; Oceanography SC Engineering; Oceanography GA 811LY UT WOS:000220774600004 ER PT J AU Tomasi, D Ernst, T Caparelli, EC Chang, L AF Tomasi, D Ernst, T Caparelli, EC Chang, L TI Practice-induced changes of brain function during visual attention: a parametric fMRI study at 4 Tesla SO NEUROIMAGE LA English DT Article DE practice; brain; visual attention ID POSITRON-EMISSION-TOMOGRAPHY; MEDIAL PREFRONTAL CORTEX; EMOTION-INDUCED CHANGES; WORKING-MEMORY; TASK-PERFORMANCE; ACTIVATION; ANATOMY; LOAD; MECHANISMS; TRACKING AB A parametric functional MRI (fMRI) study with three levels of task difficulty was performed to determine the effect of practice and attentional load on brain activation during visual attention tasks. Brief practice during repeat fMRI scanning (20 min) did not change performance accuracy or reaction times (RT), but decreased activation bilaterally in the inferior, middle, and superior frontal gyri, superior temporal gyrus, thalamus, and cerebellum. Increased attentional load decreased performance accuracy but not RT, and increased activation bilaterally in the inferior, posterior, and superior parietal cortices, thalamus, cerebellum, and frontal gyri. These changes suggest that practice decreases dependency on thalamus, cerebellum, and the frontal cortices for controlled task processing possibly due to increased efficiency of the attentional network. Since short-term practice-effects in the prefrontal cortex may be similar to attentional load-effects, studies of attentional load need to take practice effects into account. (C) 2004 Elsevier Inc. All rights reserved. C1 Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. RP Tomasi, D (reprint author), Brookhaven Natl Lab, Dept Med, 30 Bell Ave,Bldg 490, Upton, NY 11973 USA. EM tomasi@bnl.gov RI Tomasi, Dardo/J-2127-2015 FU NIDA NIH HHS [K02 DA16991, K24 DA16170, R03 DA 017070-01, R03 DA017070-01]; NIMH NIH HHS [R01 MH61427] NR 35 TC 63 Z9 64 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 1053-8119 J9 NEUROIMAGE JI Neuroimage PD DEC PY 2004 VL 23 IS 4 BP 1414 EP 1421 DI 10.1016/j.neuroimage.2004.07.065 PG 8 WC Neurosciences; Neuroimaging; Radiology, Nuclear Medicine & Medical Imaging SC Neurosciences & Neurology; Radiology, Nuclear Medicine & Medical Imaging GA 883US UT WOS:000226041800017 PM 15589105 ER PT J AU Ding, YS Fowler, J Logan, J Wang, GJ Volkow, N Vocci, F AF Ding, YS Fowler, J Logan, J Wang, GJ Volkow, N Vocci, F TI 6-[18F]fluoro-A-85380, a new PET ligand for the nicotinic acetylcholine receptor: Studies in the human brain and in vivo demonstration of specific binding in white matter SO NEUROPSYCHOPHARMACOLOGY LA English DT Meeting Abstract CT Annual Meeting of the American-College-of-Neuropsychopharmacology CY DEC 12-16, 2004 CL San Juan, PR SP Vanderbilt Univ, Sch Med, Dept Psychiaty, Amer Coll Neuropsychopharmacol C1 Brookhaven Natl Lab, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0893-133X J9 NEUROPSYCHOPHARMACOL JI Neuropsychopharmacology PD DEC PY 2004 VL 29 SU 1 BP S79 EP S79 PG 1 WC Neurosciences; Pharmacology & Pharmacy; Psychiatry SC Neurosciences & Neurology; Pharmacology & Pharmacy; Psychiatry GA 877RO UT WOS:000225588000233 ER PT J AU Eberling, J Bankiewicz, KS AF Eberling, J Bankiewicz, KS TI Imaging gene expression: Preclinical studies in a primate model of Parkinson's disease SO NEUROPSYCHOPHARMACOLOGY LA English DT Meeting Abstract CT Annual Meeting of the American-College-of-Neuropsychopharmacology CY DEC 12-16, 2004 CL San Juan, PR SP Vanderbilt Univ, Sch Med, Dept Psychiaty, Amer Coll Neuropsychopharmacol C1 Lawrence Berkeley Lab, Berkeley, CA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0893-133X J9 NEUROPSYCHOPHARMACOL JI Neuropsychopharmacology PD DEC PY 2004 VL 29 SU 1 BP S25 EP S26 PG 2 WC Neurosciences; Pharmacology & Pharmacy; Psychiatry SC Neurosciences & Neurology; Pharmacology & Pharmacy; Psychiatry GA 877RO UT WOS:000225588000078 ER PT J AU Wang, GJ Volkow, ND Fowler, JS AF Wang, GJ Volkow, ND Fowler, JS TI Neurofunctional imaging studies of obesity and addiction SO NEUROPSYCHOPHARMACOLOGY LA English DT Meeting Abstract CT Annual Meeting of the American-College-of-Neuropsychopharmacology CY DEC 12-16, 2004 CL San Juan, PR SP Vanderbilt Univ, Sch Med, Dept Psychiaty, Amer Coll Neuropsychopharmacol C1 Brookhaven Natl Lab, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0893-133X J9 NEUROPSYCHOPHARMACOL JI Neuropsychopharmacology PD DEC PY 2004 VL 29 SU 1 BP S30 EP S31 PG 2 WC Neurosciences; Pharmacology & Pharmacy; Psychiatry SC Neurosciences & Neurology; Pharmacology & Pharmacy; Psychiatry GA 877RO UT WOS:000225588000093 ER PT J AU Wu, HM Huang, SC Hattori, N Glenn, TC Vespa, PM Hovda, DA Bergsneider, M AF Wu, HM Huang, SC Hattori, N Glenn, TC Vespa, PM Hovda, DA Bergsneider, M TI Subcortical white matter metabolic chances remote from focal hemorrhagic lesions suggest diffuse injury after human traumatic brain injury SO NEUROSURGERY LA English DT Article DE diffuse axonal injury; hyperglycolysis; oxidative metabolism; reactive gliosis ID CEREBRAL BLOOD-FLOW; POSITRON-EMISSION-TOMOGRAPHY; MAGNETIC-RESONANCE SPECTROSCOPY; AXONAL INJURY; HEAD-INJURY; GLUCOSE-UTILIZATION; OXYGEN UTILIZATION; PRACTICAL SCALE; CYCLOSPORINE-A; NORMAL VALUES AB OBJECTIVE: We used positron emission tomographic studies to prospectively examine the relationship between glucose and oxidative metabolism in the subcortical white matter (WM) acutely after traumatic brain injury (TBI). The objective was to determine the nature, extent, and degree of metabolic abnormalities in subcortical brain regions remote from hemorrhagic lesions. METHODS: Sixteen normal volunteers and 10 TBI patients (Glasgow Coma Scale score, 4-10; age, 17-64 yr; 6 with focal and 4 with diffuse injury) were studied. Each subject underwent dynamic positron emission tomographic studies using [O-15]CO, O-15(2), [O-15]H2O, and fluorodeoxyglucose plus a magnetic resonance imaging scan acutely after TBI. Parametric images of the metabolic rate of oxygen and metabolic rate of glucose were generated, and a molar oxygen-to-glucose utilization ratio was calculated. Data from gray matter and WM remote from hemorrhagic lesions, plus whole brain, were analyzed. RESULTS: There was a significant reduction in the subcortical WM oxygen-to-glucose utilization ratio after TBI compared with normal values (3.99 +/- 0.77 versus 5.37 +/- 1.00; P < 0.01), whereas the mean cortical gray matter and whole-brain values remained unchanged. WM metabolic changes, which were diffuse throughout the hemispheres, were characterized by a reduction in the metabolic rate of oxygen without a concomitant drop in the metabolic rate of glucose. CONCLUSION: The extent and degree of subcortical WM metabolic abnormalities after moderate and severe TBI suggest that diffuse WM injury is a general phenomenon after such injuries. This pervasive finding may indicate that the concept of focal traumatic injury, although valid from a computed tomographic imaging standpoint, may be misleading when considering metabolic derangements associated with TBI. C1 Univ Calif Los Angeles, Daivd Geffen Sch Med, Brain Injury Res Ctr, Div Neurosurg, Los Angeles, CA 90095 USA. Univ Calif Los Angeles, David Geffen Sch Med, Dept Mol & Med Pharmacol, Los Angeles, CA 90095 USA. Univ Calif Los Angeles, David Geffen Sch Med, DOE Ctr Mol Med, Los Angeles, CA 90095 USA. RP Bergsneider, M (reprint author), Univ Calif Los Angeles, Daivd Geffen Sch Med, Brain Injury Res Ctr, Div Neurosurg, 10833 Leconte Ave,Room 74-134 CHS,Mail Code 95690, Los Angeles, CA 90095 USA. EM mbergsneider@mednet.ucla.edu RI Hattori, Naoya/G-2298-2012 FU NIDCR NIH HHS [DE-FC03-02ER63420, DE-FC0387-ER60615]; PHS HHS [30308] NR 58 TC 31 Z9 34 U1 0 U2 3 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0148-396X J9 NEUROSURGERY JI Neurosurgery PD DEC PY 2004 VL 55 IS 6 BP 1306 EP 1317 PG 12 WC Clinical Neurology; Surgery SC Neurosciences & Neurology; Surgery GA 878CB UT WOS:000225623000009 PM 15574212 ER PT J AU Poet, TS Kousba, AA Dennison, SL Timchalk, C AF Poet, TS Kousba, AA Dennison, SL Timchalk, C TI Physiologically based pharmacokinetic/pharmacodynamic model for the organophosphorus pesticide diazinon SO NEUROTOXICOLOGY LA English DT Article DE organophosphate pesticide; PBPK/PD; cholinesterase inhibition ID PHARMACODYNAMIC PBPK/PD MODEL; IN-VITRO; PERCUTANEOUS-ABSORPTION; CHLORPYRIFOS-OXON; RAT-LIVER; PHARMACOKINETIC MODELS; TISSUE DISTRIBUTION; ORGANIC-CHEMICALS; DERMAL ABSORPTION; METABOLISM AB Diazinon (DZN) is an organophosphorus pesticide with the possibility for widespread exposures. The toxicological effects of DZN are primarily mediated through the effects of its toxic metabolite, DZN-oxon on aceiylcholinesterases, which results in accumulation of acetylcholine at neuronal junctions. A physiologically based pharmacokinetic/pharmacodynamic (PBPK/PD) model was developed to quantitatively assess the kinetics of DZN and its metabolites in blood and the inhibition of cholinesterases in plasma, RBC, brain, and diaphragm. Focused in vivo pharmacokinetic studies were conducted in male Sprague-Dawley rats and the data were used to refine the model. No overt toxicity was noted following doses up to 100 mg/kg. However cholinesterases in plasma, RBC, brain and diaphragm were substantially inhibited at doses of 50 mg/kg. In plasma, total cholinesterase was inhibited to less than 20% of control by 6 h post dosing with 100 mg/kg. Inhibition of brain acetylcholinesterase (AChE)following 100 mg/kg exposures was approximately 30% of control by 6 h. Diaphragm butyrylcholineste rase (BuChE) inhibition following 100 mg/kg dosing was to less than 20% of control by 6 h. The PBPK/PD model was used to describe the concentrations of DZN and its major, inactive metabolite, 2-isopropyl-4-methyl-6-hydroxypyrimidine (IMHP) in plasma and urinary elimination of IMHP The fit of the model to plasma, RBC, brain, and diaphragm total cholinesterase and BuChE activity was also assessed and the model was further validated by fitting data from the open literature for intraperitoneal, intravenous, and oral exposures to DZN. The model was shown to quantitatively estimate target tissue dosimetty and cholinesterase inhibition following several routes of exposures. This model further confirms the usefulness of the model structure previously validated for chlorpyrifos and shows the potential utility of the model framework for other related organophosphate pesticides. (C) 2004 Elsevier Inc. All rights reserved. C1 Battelle Mem Inst, Pacific NW Div, Ctr Biol Monitoring & Modeling, Richland, WA 99352 USA. RP Poet, TS (reprint author), Battelle Mem Inst, Pacific NW Div, Ctr Biol Monitoring & Modeling, POB 999,MSIN P7-59, Richland, WA 99352 USA. EM torka.poet@pnl.gov FU NIOSH CDC HHS [1 R01 OH03629-01A2] NR 50 TC 54 Z9 60 U1 3 U2 15 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0161-813X J9 NEUROTOXICOLOGY JI Neurotoxicology PD DEC PY 2004 VL 25 IS 6 BP 1013 EP 1030 DI 10.1016/j.neuro.2004.03.002 PG 18 WC Neurosciences; Pharmacology & Pharmacy; Toxicology SC Neurosciences & Neurology; Pharmacology & Pharmacy; Toxicology GA 866IU UT WOS:000224768000012 PM 15474619 ER PT J AU Williams, PT AF Williams, PT TI Turbulent magnetohydrodynamic elasticity: Boussinesq-like approximations for steady shear SO NEW ASTRONOMY LA English DT Article DE MHD; turbulence AB We re-examine the Boussinesq hypothesis of an effective turbulent viscosity within the context of simple closure considerations for models of strong magneto hydrodynamic turbulence. Reynolds-stress and turbulent Maxwell-stress closure models will necessarily introduce a suite of transport coefficients, all of which are to some degree model-dependent. One of the most important coefficients is the relaxation time for the turbulent Maxwell stress, which until recently has been relatively ignored. We discuss this relaxation within the context of magneto hydrodynamic turbulence in steady high fluid Reynolds-number, high magnetic-Reynolds-number shearing flows. The relaxation time for the turbulent Maxwell stress is not constrained by the shear time scale, in contrast with Reynolds-stress closure models for purely hydrodynamical turbulence. As a result, the anisotropy of the turbulent stress tensor for magnetohydrodynamic turbulence, even for the case of zero mean-field considered here, cannot be neglected. This shear-generated anisotropy can be interpreted as being due to an effective turbulent elasticity, in analogy to the Boussinesq turbulent viscosity. We claim that this turbulent elasticity should be important for any astrophysical problem in which the turbulent stress in quasi-steady shear has been treated phenomenologically with an effective viscosity. (C) 2004 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, MS P225,POB 1663, Los Alamos, NM 87545 USA. EM ptw@lanl.gov NR 10 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1384-1076 EI 1384-1092 J9 NEW ASTRON JI New Astron. PD DEC PY 2004 VL 10 IS 2 BP 133 EP 144 DI 10.1016/j.newast.2004.03.006 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 903PF UT WOS:000227437400006 ER PT J AU Helmer, RG AF Helmer, RG TI Nuclear data sheets for A=157 SO NUCLEAR DATA SHEETS LA English DT Review ID RARE-EARTH NUCLEI; ODD-A NUCLEI; HIGH-SPIN STATES; NEUTRON-DEFICIENT ISOTOPES; DIPOLE TRANSITION-PROBABILITIES; PROTON TRANSFER-REACTIONS; GAMMA-RAY SPECTROMETER; MASS DYSPROSIUM NUCLEI; ROTATIONAL BANDS; HYPERFINE-STRUCTURE AB The experimental results from the various reaction and decay studies leading to nuclides in the A=157 mass chain have been reviewed. These data are summarized and presented, together with adopted level schemes and properties. C1 Idaho Natl Lab, Idaho Falls, ID 83415 USA. Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA. RP Helmer, RG (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA. NR 395 TC 14 Z9 14 U1 0 U2 1 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0090-3752 EI 1095-9904 J9 NUCL DATA SHEETS JI Nucl. Data Sheets PD DEC PY 2004 VL 103 IS 4 BP 565 EP + DI 10.1016/j.nds.2004.11.007 PG 217 WC Physics, Nuclear SC Physics GA 885TG UT WOS:000226179200002 ER PT J AU Barty, CPJ Key, M Britten, J Beach, R Beer, G Brown, C Bryan, S Caird, J Carlson, T Crane, J Dawson, J Erlandson, AC Fittinghoff, D Hermann, M Hoaglan, C Iyer, A Jones, L Jovanovic, I Komashko, A Landen, O Liao, Z Molander, W Mitchell, S Moses, E Nielsen, N Nguyen, HH Nissen, J Payne, S Pennington, D Risinger, L Rushford, M Skulina, K Spaeth, M Stuart, B Tietbohl, G Wattellier, B AF Barty, CPJ Key, M Britten, J Beach, R Beer, G Brown, C Bryan, S Caird, J Carlson, T Crane, J Dawson, J Erlandson, AC Fittinghoff, D Hermann, M Hoaglan, C Iyer, A Jones, L Jovanovic, I Komashko, A Landen, O Liao, Z Molander, W Mitchell, S Moses, E Nielsen, N Nguyen, HH Nissen, J Payne, S Pennington, D Risinger, L Rushford, M Skulina, K Spaeth, M Stuart, B Tietbohl, G Wattellier, B TI An overview of LLNL high-energy short-pulse technology for advanced radiography of laser fusion experiments SO NUCLEAR FUSION LA English DT Article ID DIFFRACTION GRATINGS; PETAWATT LASER AB The technical challenges and motivations for high-energy, short-pulse generation with the National Ignition Facility (NIF) and possibly other large-scale Nd : glass lasers are reviewed. High-energy short-pulse generation (multi-kilojoule, picosecond pulses) will be possible via the adaptation of chirped pulse amplification laser techniques on NIF. Development of metre-scale, high-efficiency, high-damage-threshold final optics is a key technical challenge. In addition, deployment of high energy petawatt (HEPW) pulses on NIF is constrained by existing laser infrastructure and requires new, compact compressor designs and short-pulse, fibre-based, seed-laser systems. The key motivations for HEPW pulses on NIF is briefly outlined and includes high-energy, x-ray radiography, proton beam radiography, proton isochoric heating and tests of the fast ignitor concept for inertial confinement fusion. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Barty, CPJ (reprint author), Lawrence Livermore Natl Lab, Mail Code L-470,7000 East Ave, Livermore, CA 94550 USA. EM barty1@llnl.gov RI Stuart, Brent/K-4988-2015 NR 18 TC 70 Z9 74 U1 2 U2 23 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 DEC PY 2004 VL 44 IS 12 BP S266 EP S275 AR PII S0029-5515(04)88687-3 DI 10.1088/0029-5515/44/12/S18 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 885SJ UT WOS:000226176900019 ER PT J AU Glenzer, SH Arnold, P Bardsley, G Berger, RL Bonanno, G Borger, T Bower, DE Bowers, M Bryant, R Buckman, S Burkhart, SC Campbell, K Chrisp, MP Cohen, BI Constantin, C Cooper, F Cox, J Dewald, E Divol, L Dixit, S Duncan, J Eder, D Edwards, J Erbert, G Felker, B Fornes, J Frieders, G Froula, DH Gardner, SD Gates, C Gonzalez, M Grace, S Gregori, G Greenwood, A Griffith, R Hall, T Hammel, BA Haynam, C Heestand, G Henesian, M Hermes, G Hinkel, D Holder, J Holdner, F Holtmeier, G Hsing, W Huber, S James, T Johnson, S Jones, OS Kalantar, D Kamperschroer, JH Kauffman, R Kelleher, T Knight, J Kirkwood, RK Kruer, WL Labiak, W Landen, OL Langdon, AB Langer, S Latray, D Lee, A Lee, FD Lund, D MacGowan, B Marshall, S McBride, J McCarville, T McGrew, L Mackinnon, AJ Mahavandi, S Manes, K Marshall, C Menapace, J Mertens, E Meezan, N Miller, G Montelongo, S Moody, JD Moses, E Munro, D Murray, J Neumann, J Newton, M Niemann, C Nikitin, A Opsahl, P Padilla, E Parham, T Parrish, G Petty, C Polk, M Powell, C Reinbachs, I Rekow, V Rinnert, R Riordan, B Rhodes, M Roberts, V Robey, H Ross, G Sailors, S Saunders, R Schmitt, M Schneider, MB Shiromizu, S Spaeth, M Stephens, A Still, B Suter, LJ Tietbohl, G Tobin, M Tuck, J Van Wonterghem, BM Vidal, R Voloshin, D Wallace, R Wegner, P Whitman, P Williams, EA Williams, K Winward, K Work, K Young, B Young, PE Zapata, P Bahr, RE Seka, W Fernandez, J Montgomery, D Rose, H AF Glenzer, SH Arnold, P Bardsley, G Berger, RL Bonanno, G Borger, T Bower, DE Bowers, M Bryant, R Buckman, S Burkhart, SC Campbell, K Chrisp, MP Cohen, BI Constantin, C Cooper, F Cox, J Dewald, E Divol, L Dixit, S Duncan, J Eder, D Edwards, J Erbert, G Felker, B Fornes, J Frieders, G Froula, DH Gardner, SD Gates, C Gonzalez, M Grace, S Gregori, G Greenwood, A Griffith, R Hall, T Hammel, BA Haynam, C Heestand, G Henesian, M Hermes, G Hinkel, D Holder, J Holdner, F Holtmeier, G Hsing, W Huber, S James, T Johnson, S Jones, OS Kalantar, D Kamperschroer, JH Kauffman, R Kelleher, T Knight, J Kirkwood, RK Kruer, WL Labiak, W Landen, OL Langdon, AB Langer, S Latray, D Lee, A Lee, FD Lund, D MacGowan, B Marshall, S McBride, J McCarville, T McGrew, L Mackinnon, AJ Mahavandi, S Manes, K Marshall, C Menapace, J Mertens, E Meezan, N Miller, G Montelongo, S Moody, JD Moses, E Munro, D Murray, J Neumann, J Newton, M Niemann, C Nikitin, A Opsahl, P Padilla, E Parham, T Parrish, G Petty, C Polk, M Powell, C Reinbachs, I Rekow, V Rinnert, R Riordan, B Rhodes, M Roberts, V Robey, H Ross, G Sailors, S Saunders, R Schmitt, M Schneider, MB Shiromizu, S Spaeth, M Stephens, A Still, B Suter, LJ Tietbohl, G Tobin, M Tuck, J Van Wonterghem, BM Vidal, R Voloshin, D Wallace, R Wegner, P Whitman, P Williams, EA Williams, K Winward, K Work, K Young, B Young, PE Zapata, P Bahr, RE Seka, W Fernandez, J Montgomery, D Rose, H TI Progress in long scale length laser-plasma interactions SO NUCLEAR FUSION LA English DT Article ID NATIONAL IGNITION FACILITY; PHYSICS BASIS; DRIVEN; TARGETS; FUSION; WAVES; GAIN AB The first experiments on the National Ignition Facility (NIF) have employed the first four beams to measure propagation and laser backscattering losses in large ignition-size plasmas. Gas-filled targets between 2 and 7 mm length have been heated from one side by overlapping the focal spots of the four beams from one quad operated at 351 nm (3omega) with a total intensity of 2 x 10(15) W cm(-2). The targets were filled with 1 atm Of CO2 producing up to 7 mm long homogeneously heated plasmas with densities of n(e) = 6 x 10(20) cm(-3) and temperatures of T-e = 2 keV. The high energy in an NIF quad of beams of 16kJ, illuminating the target from one direction, creates unique conditions for the study of laser-plasma interactions at scale lengths not previously accessible. The propagation through the large-scale plasma was measured with a gated x-ray imager that was filtered for 3.5 keV x-rays. These data indicate that the beams interact with the full length of this ignition-scale plasma during the last similar to1 ns of the experiment. During that time, the full aperture measurements of the stimulated Brillouin scattering and stimulated Raman scattering show scattering into the four focusing lenses of 3% for the smallest length (similar to2 mm), increasing to 10-12% for similar to7 mm. These results demonstrate the NIF experimental capabilities and further provide a benchmark for three-dimensional modelling of the laser-plasma interactions at ignition-size scale lengths. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Rochester, Laser Energet Lab, Rochester, NY USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Lawrence Livermore Natl Lab, POB 808,L-399, Livermore, CA 94551 USA. RI Fernandez, Juan/H-3268-2011; MacKinnon, Andrew/P-7239-2014; OI Fernandez, Juan/0000-0002-1438-1815; MacKinnon, Andrew/0000-0002-4380-2906; Montgomery, David/0000-0002-2355-6242 NR 13 TC 28 Z9 29 U1 1 U2 15 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0029-5515 EI 1741-4326 J9 NUCL FUSION JI Nucl. Fusion PD DEC PY 2004 VL 44 IS 12 BP S185 EP S190 AR PII S0029-5515(04)86276-8 DI 10.1088/0029-5515/44/12/S08 PG 6 WC Physics, Fluids & Plasmas SC Physics GA 885SJ UT WOS:000226176900009 ER PT J AU Goodin, DT Alexander, NB Brown, LC Frey, DT Gallix, R Gibson, CR Maxwell, JL Nobile, A Olson, C Petzoldt, RW Raffray, R Rochau, G Schroen, DG Tillack, M Rickman, WS Vermillion, B AF Goodin, DT Alexander, NB Brown, LC Frey, DT Gallix, R Gibson, CR Maxwell, JL Nobile, A Olson, C Petzoldt, RW Raffray, R Rochau, G Schroen, DG Tillack, M Rickman, WS Vermillion, B TI A cost-effective target supply for inertial fusion energy SO NUCLEAR FUSION LA English DT Article ID CRYOGENIC TARGETS; HEAVY-ION; INJECTION; FABRICATION; REACTOR; WALL AB A central feature of an inertial fusion energy (IFE) power plant is a target that has been compressed and heated to fusion conditions by the energy input of the driver. This is true whether the driver is a laser system, heavy ion beams or Z-pinch system. The IFE target fabrication, injection and tracking programmes are focusing on methods that will scale to mass production. We are working closely with target designers, and power plant systems specialists, to make specifications and material selections that will satisfy a wide range of required and desirable target characteristics. One-of-a-kind capsules produced for today's inertial confinement fusion experiments are estimated to cost about US$2500 each. Design studies of cost-effective power production from laser and heavy-ion driven IFE have suggested a cost goal of about $0.25-0.30 for each injected target (corresponding to similar to10% of the 'electricity value' in a target). While a four orders of magnitude cost reduction may seem at first to be nearly impossible, there are many factors that suggest this is achievable. This paper summarizes the design, specifications, requirements and proposed manufacturing processes for the future for laser fusion, heavy ion fusion and Z-pinch driven targets. These target manufacturing processes have been developed-and are proposed-based on the unique materials science and technology programmes that are ongoing for each of the target concepts. We describe the paradigm shifts in target manufacturing methodologies that will be needed to achieve orders of magnitude reductions in target costs, and summarize the results of 'nth-of-a-kind' plant layouts and cost estimates for future IFE power plant fuelling. These engineering studies estimate the cost of the target supply in a fusion economy, and show that costs are within the range of commercial feasibility for electricity production. C1 Gen Atom Co, San Diego, CA 92186 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Schafer Corp, Livermore, CA 94550 USA. TSD Management Associates, Encinitas, CA 92024 USA. RP Gen Atom Co, POB 85608, San Diego, CA 92186 USA. NR 25 TC 12 Z9 12 U1 0 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0029-5515 EI 1741-4326 J9 NUCL FUSION JI Nucl. Fusion PD DEC PY 2004 VL 44 IS 12 BP S254 EP S265 AR PII S0029-5515(04)88685-X DI 10.1088/0029-5515/44/12/S17 PG 12 WC Physics, Fluids & Plasmas SC Physics GA 885SJ UT WOS:000226176900018 ER PT J AU Haan, SW Amendt, PA Dittrich, TR Hammel, BA Hatchett, SP Herrmann, MC Hurricane, OA Jones, OS Lindl, JD Marinak, MM Munro, D Pollaine, SM Salmonson, JD Strobel, GL Suter, LJ AF Haan, SW Amendt, PA Dittrich, TR Hammel, BA Hatchett, SP Herrmann, MC Hurricane, OA Jones, OS Lindl, JD Marinak, MM Munro, D Pollaine, SM Salmonson, JD Strobel, GL Suter, LJ TI Design and simulations of indirect drive ignition targets for NIF SO NUCLEAR FUSION LA English DT Article ID HYDRA SIMULATIONS; FACILITY TARGETS; CAPSULE DESIGNS; PHYSICS AB Studies on simulation and design of ignition targets for the National Ignition Facility (NIF) are described. Recent effort has emphasized the systematic exploration of the parameter space of possible ignition targets, providing comparisons as specific as possible between the various targets. This study aims at providing guidance for target fabrication R&D, and for other elements of the ignition program. Targets are being considered that span 250350 eV drive temperatures, capsule energies from 150 to 600 U, cocktail and gold hohlraum spectra, and three ablator materials (Be[Cu], CH[Ge] and polyimide). Capsules with graded doped beryllium ablators are found to be very stable with respect to short-wavelength Rayleigh-Taylor growth. Sensitivity to ablator roughness, ice roughness and asymmetry is being explored, as it depends on ablator material, drive temperature and absorbed energy. Three-dimensional simulations are being used to ensure adequate radiation symmetry in three dimensions (3D), and to ensure that coupling of 3D asymmetry and 3D Rayleigh-Taylor does not adversely affect planned performance. Integrated 3D hohlraum simulations indicate that 3D features in the laser illumination pattern affect the hohlraums' performance, and the hohlraum has been redesigned to accommodate these effects. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Georgia, Dept Phys, Athens, GA 30602 USA. RP Haan, SW (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. EM haan1@llnl.gov NR 20 TC 34 Z9 34 U1 1 U2 14 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 DEC PY 2004 VL 44 IS 12 BP S171 EP S176 AR PII S0029-5515(04)88467-9 DI 10.1088/0029-5515/44/12/S06 PG 6 WC Physics, Fluids & Plasmas SC Physics GA 885SJ UT WOS:000226176900007 ER PT J AU Koenig, M Henry, E Huser, G Benuzzi-Mounaix, A Faral, B Martinolli, E Lepape, S Vinci, T Batani, D Tomasini, M Telaro, B Loubeyre, P Hall, T Celliers, P Collins, G DaSilva, L Cauble, R Hicks, D Bradley, D MacKinnon, A Patel, P Eggert, J Pasley, J Willi, O Neely, A Notley, M Danson, C Borghesi, M Romagnani, L Boehly, T Lee, K AF Koenig, M Henry, E Huser, G Benuzzi-Mounaix, A Faral, B Martinolli, E Lepape, S Vinci, T Batani, D Tomasini, M Telaro, B Loubeyre, P Hall, T Celliers, P Collins, G DaSilva, L Cauble, R Hicks, D Bradley, D MacKinnon, A Patel, P Eggert, J Pasley, J Willi, O Neely, A Notley, M Danson, C Borghesi, M Romagnani, L Boehly, T Lee, K TI High pressures generated by laser driven shocks: applications to planetary physics SO NUCLEAR FUSION LA English DT Article ID EQUATION-OF-STATE; EARTHS CORE; REFRACTIVE-INDEX; MELTING CURVE; IRON; SOLIDS; WATER; TEMPERATURES; DEUTERIUM; PLASMA AB High power lasers are a tool that can be used to determine important parameters in the context of Warm Dense Matter, i.e. at the convergence of low-temperature plasma physics and finite-temperature condensed matter physics. Recent results concerning planet inner core materials such as water and iron are presented. We determined the equation of state, temperature and index of refraction of water for pressures up to 7 Mbar. The release state of iron in a LiF window allowed us to investigate the melting temperature near the inner core boundary conditions. Finally, the first application of proton radiography to the study of shocked material is also discussed. C1 Univ Paris 06, Ecole Polytech, Lab Utilisat Lasers Intenses, CNRS,UMR7605,CEA, F-91128 Palaiseau, France. Univ Milan, Dipartimento Fis G Occhialini, I-20126 Milan, Italy. INFM, I-20126 Milan, Italy. CEA, DRIF, F-91680 Bruyeres Le Chatel, France. Univ Essex, Colchester CO4 3SQ, Essex, England. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England. Rutherford Appleton Lab, Cent Laser Facil, Didcot OX11 0QX, Oxon, England. Queens Univ Belfast, Belfast BT7 1NN, Antrim, North Ireland. Univ Rochester, Laser Energet Lab, Rochester, NY 14627 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. RP Koenig, M (reprint author), Univ Paris 06, Ecole Polytech, Lab Utilisat Lasers Intenses, CNRS,UMR7605,CEA, F-91128 Palaiseau, France. EM michel.koenig@polytechnique.fr RI Koenig, Michel/A-2167-2012; Borghesi, Marco/K-2974-2012; Hicks, Damien/B-5042-2015; MacKinnon, Andrew/P-7239-2014; Brennan, Patricia/N-3922-2015 OI Hicks, Damien/0000-0001-8322-9983; MacKinnon, Andrew/0000-0002-4380-2906; NR 36 TC 15 Z9 16 U1 0 U2 11 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 DEC PY 2004 VL 44 IS 12 BP S208 EP S214 AR PII S0029-5515(04)88117-1 DI 10.1088/0029-5515/44/12/S11 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 885SJ UT WOS:000226176900012 ER PT J AU Miller, GH Moses, EI Wuest, CR AF Miller, GH Moses, EI Wuest, CR TI The National Ignition Facility: enabling fusion ignition for the 21st century SO NUCLEAR FUSION LA English DT Article ID LASER-SYSTEM; WAVE-FRONT; FREQUENCY-CONVERSION; FUSED-SILICA; POCKELS CELL; NIF; DESIGN; OPTICS; DAMAGE; PERFORMANCE AB The National Ignition Facility (NIF) at Lawrence Livermore National Laboratory, when completed in 2008, will contain a 192-beam, 1.8MJ, 500TW, ultraviolet laser system together with a 10m diameter target chamber and room for 100 diagnostics. NIF is housed in a 26000m(2) environmentally controlled building and is the world's largest and most energetic laser experimental system. NIF provides a scientific centre for the study of inertial confinement fusion and the physics of matter at extreme energy densities and pressures. NIF's energetic laser beams will compress fusion targets to conditions required for thermonuclear burn, liberating more energy than required to initiate the fusion reactions. Other NIF experiments will study physical processes at temperatures and pressures approaching 10(8) K and 10(11) bar, respectively, conditions that exist naturally only in the interior of stars and planets. NIF is currently configured with four laser beams activated in late 2002. These beams are being regularly used for laser performance and physics experiments, and to date nearly 250 system shots have been conducted. NIF's laser beams have generated 106 kJ in 23 ns pulses of infrared light and over 16 kJ in 3.5 ns pulses at the third harmonic (351 nm). A number of target experimental systems are being commissioned in support of experimental campaigns. This paper provides a detailed look at the NIF laser systems, laser and optical performance, and results from laser commissioning shots. We also discuss NIF's high-energy density and inertial fusion experimental capabilities, the first experiments on NIF, and plans for future capabilities of this unique facility. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Miller, GH (reprint author), Lawrence Livermore Natl Lab, POB 808,L-466, Livermore, CA 94551 USA. NR 62 TC 159 Z9 163 U1 8 U2 39 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 DEC PY 2004 VL 44 IS 12 BP S228 EP S238 AR PII S0029-5515(04)88517-X DI 10.1088/0029-5515/44/12/S14 PG 11 WC Physics, Fluids & Plasmas SC Physics GA 885SJ UT WOS:000226176900015 ER PT J AU Sharp, WM Callahan, DA Tabak, M Yu, SS Peterson, PF Rose, DV Welch, DR AF Sharp, WM Callahan, DA Tabak, M Yu, SS Peterson, PF Rose, DV Welch, DR TI Chamber-transport simulation results for heavy-ion fusion drivers SO NUCLEAR FUSION LA English DT Article ID INERTIAL CONFINEMENT FUSION; TARGET; BEAMS AB The heavy-ion fusion community recently developed a power-plant design that meets the various requirements of accelerators, final focus, chamber transport and targets. The point design is intended to minimize physics risk and is certainly not optimal for the cost of electricity. Recent chamber-transport simulations, however, indicate that changes in the beam ion species, the convergence angle and the emittance might allow more-economical designs. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Mission Res Corp, Albuquerque, NM 87104 USA. RP Sharp, WM (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 19 TC 9 Z9 9 U1 0 U2 0 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 DEC PY 2004 VL 44 IS 12 BP S221 EP S227 AR PII S0029-5515(04)87949-3 DI 10.1088/0029-5515/44/12/S13 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 885SJ UT WOS:000226176900014 ER PT J AU Suter, LJ Glenzer, S Haan, S Hammel, B Manes, K Meezan, N Moody, J Spaeth, M Oades, K Stevenson, M AF Suter, LJ Glenzer, S Haan, S Hammel, B Manes, K Meezan, N Moody, J Spaeth, M Oades, K Stevenson, M TI A summary of explorations into the use of green light for high-gain, high-yield experiments on the National Ignition Facility SO NUCLEAR FUSION LA English DT Article ID ND-GLASS LASER; INERTIAL CONFINEMENT FUSION; PLASMA; TARGETS; DESIGN AB For several years we have been exploring the possibility of using green (2omega) light for indirect drive ignition on National Ignition Facility (NIF). This paper is a comprehensive review of our progress in this investigation and was the subject of a Teller lecture when one of the authors (LJS) was honoured with the Edward Teller Medal at the IFSA03 conference on September 12th, 2003, at Monterey, CA. While much of the work presented here has been previously published (Suter L.J. et al 2004 Phys. Plasmas 112738) and is included for completeness of the review, this paper also includes new research examining the possibility of higher temperature (300 eV) ignition hohlraums driven by green light (section 7). C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Atom Weapons Establishment, Aldermaston, England. RP Suter, LJ (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 23 TC 7 Z9 7 U1 0 U2 2 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 DEC PY 2004 VL 44 IS 12 BP S140 EP S148 AR PII S0029-5515(04)88252-8 DI 10.1088/0029-5515/44/12/S04 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 885SJ UT WOS:000226176900005 ER PT J AU Kim, JG Dardin, SM Kadel, RW Kadyk, JA Peskov, V Wenzel, WA AF Kim, JG Dardin, SM Kadel, RW Kadyk, JA Peskov, V Wenzel, WA TI Electron avalanches in liquid argon mixtures SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE liquid argon; xenon; avalanche; mobility; ionization ID XENON; IONIZATION; EMISSION; CHAMBER; LIGHT; FIELD AB We have observed stable avalanche gain in liquid argon when mixed with small amounts of xenon (xe) in the high electric field (> 7 MV/cm) near the point of a chemically etched needle in a point-plane geometry. We identify two gain mechanisms, one pressure dependent, and the other independent of the applied pressure. We conclude that the pressure dependent signals are from avalanche gain in gas bubbles at the tip of the needle, while the pressure-independent pulses are from avalanche gain in liquid. We measure the decay time spectra of photons from both types of avalanches. The decay times from the pressure-dependent pulses decrease (increase) with the applied pressure (high voltage), while the decay times from the pressure-independent pulses are approximately independent of pressure or high voltage. For our operating conditions, the collected charge distribution from avalanches is similar for 60 or 122 keV photon sources. With krypton additives, instead of Xe, we measure behavior consistent with only the pressure-dependent pulses. Neon and TMS were also investigated as additives, and designs for practical detectors were tested. (C) 2004 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Royal Inst Technol, Stockholm, Sweden. RP Kadel, RW (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. EM rwkadel@lbl.gov NR 18 TC 10 Z9 10 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 DEC 1 PY 2004 VL 534 IS 3 BP 376 EP 396 DI 10.1016/j.nima.2004.06.136 PG 21 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 873YG UT WOS:000225317000003 ER PT J AU Batarin, V Butter, J Chen, T Davidenko, AM Derevschikov, AA Goncharenko, Y Grishin, V Kachanov, V Konstantinov, AS Kravtsov, V Kormilitsin, V Kubota, Y Matulenko, Y Medvedev, V Melnick, Y Meschanin, AP Mikhalin, NE Minaev, NG Mochalov, V Morozov, DA Nogach, L Ryazantsev, AV Semenov, P Semenov, V Shestermanov, KE Soloviev, LF Stone, S Uzunian, AV Vasiliev, AN Yakutin, AE Yarba, J AF Batarin, V Butter, J Chen, T Davidenko, AM Derevschikov, AA Goncharenko, Y Grishin, V Kachanov, V Konstantinov, AS Kravtsov, V Kormilitsin, V Kubota, Y Matulenko, Y Medvedev, V Melnick, Y Meschanin, AP Mikhalin, NE Minaev, NG Mochalov, V Morozov, DA Nogach, L Ryazantsev, AV Semenov, P Semenov, V Shestermanov, KE Soloviev, LF Stone, S Uzunian, AV Vasiliev, AN Yakutin, AE Yarba, J TI LED monitoring system for the BTeV lead tungstate crystal calorimeter prototype SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE light emitting diode; monitoring system; stability; calorimeter; scintillating crystal ID ENERGY AB We report on the performance of a monitoring system for a prototype calorimeter for the BTeV experiment that uses lead tungstate crystals coupled with photomultiplier tubes. The tests were carried out at the 70-GeV accelerator complex at Protvino, Russia. (C) 2004 Elsevier B.V. All rights reserved. C1 Inst High Energy Phys, Expt Phys Dept, Protvino 142281, Russia. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Nanjing Univ, Nanjing 210008, Peoples R China. Univ Minnesota, Minneapolis, MN 55455 USA. Syracuse Univ, Syracuse, NY 13244 USA. RP Ryazantsev, AV (reprint author), Inst High Energy Phys, Expt Phys Dept, Protvino 142281, Russia. EM ryazantsev@mx.ihep.su RI Semenov, Vitaliy/E-9584-2017 NR 7 TC 8 Z9 9 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 DEC 1 PY 2004 VL 534 IS 3 BP 486 EP 495 DI 10.1016/j.nima.2004.06.161 PG 10 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 873YG UT WOS:000225317000008 ER PT J AU Norman, EB Prussin, SG Larimer, RM Shugart, H Browne, E Smith, AR McDonald, RJ Nitsche, H Gupta, P Frank, MI Gosnell, TB AF Norman, EB Prussin, SG Larimer, RM Shugart, H Browne, E Smith, AR McDonald, RJ Nitsche, H Gupta, P Frank, MI Gosnell, TB TI Response to a comment on "Signatures of fissille materials: high-energy gamma-rays following fission" by Zeev B. Alfassi SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Letter C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Lawrence Livermore Natl Lab, Natl Secur Int Cooperat & Arms Control Directorat, Livermore, CA 94550 USA. RP Norman, EB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, MS50-208, Berkeley, CA 94720 USA. EM ebnorman@lbl.gov NR 0 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD DEC 1 PY 2004 VL 534 IS 3 BP 577 EP 577 DI 10.1016/j.nima.2004.06.138 PG 1 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 873YG UT WOS:000225317000017 ER PT J AU Watson, PR Loveland, W Zielinski, PM Gregorich, KE Nitsche, H AF Watson, PR Loveland, W Zielinski, PM Gregorich, KE Nitsche, H TI Changes in surface composition and morphology of UF4 targets during heavy ion irradiation SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article DE ion-induced changes; nuclear reaction targets; atomic force microscopy; uranium tetrafluoride ID SINGLE-CRYSTALS; MICROSCOPY AB The changes in surface composition and morphology have been measured for UF4 targets subjected to high dose irradiation (5 x 10(18) ions) with similar to195MeV Cl-37 (similar to5.3AMeV). Using atomic force microscopy and an electron microprobe, we observed significant morphological changes in the targets along with changes in chemical composition. Published by Elsevier B.V. C1 Oregon State Univ, Dept Chem, Radiat Ctr 100, Corvallis, OR 97331 USA. Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Loveland, W (reprint author), Oregon State Univ, Dept Chem, Radiat Ctr 100, 3541 SW Jefferson Way, Corvallis, OR 97331 USA. EM lovelanw@onid.orst.edu NR 18 TC 4 Z9 4 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD DEC PY 2004 VL 226 IS 4 BP 543 EP 548 DI 10.1016/j.nimb.2004.08.019 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 875HX UT WOS:000225412100008 ER PT J AU Hall, LJ Oliver, S AF Hall, LJ Oliver, S TI Why are neutrinos light? - An alternative SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT Seminar on Neutrino Mass and Seesaw Mechanism CY FEB 23-25, 2004 CL Kek, JAPAN SP Fujihara ID BROKEN LEPTON NUMBER; COSMOLOGICAL PARAMETERS; OSCILLATIONS; MASSES AB We review the recent proposal that neutrinos are light because their masses are proportional to a low scale, f, of lepton flavor symmetry breaking. This mechanism is testable because the resulting pseudo-Goldstone bosons, of mass m(G), couple strongly with the neutrinos, affecting the acoustic oscillations during the eV era of the early universe that generate the peaks in the CMB radiation. Characteristic signals result over a very wide range Of (f, m(G)) because of a change in the total relativistic energy density and because the neutrinos scatter rather than free-stream. Thermodynamics allows a precise calculation of the signal, so that observations would not only confirm the late-time neutrino mass mechanism, but could also determine whether the neutrino spectrum is degenerate, inverted or hierarchical and whether the neutrinos are Dirac or Majorana. The flavor symmetries could also give light sterile states. If the masses of the sterile neutrinos turn on after the MeV era, the LSND oscillations can be explained without upsetting big bang nucleosynthesis, and, since the sterile states decay to lighter neutrinos and pseudo-Goldstones, without giving too much hot dark matter. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA. RP Hall, LJ (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Phys, Berkeley, CA 94720 USA. NR 25 TC 10 Z9 10 U1 0 U2 0 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 DEC PY 2004 VL 137 BP 269 EP 276 DI 10.1016/j.nuclphysbps.2004.10.076 PG 8 WC Physics, Particles & Fields SC Physics GA 895KG UT WOS:000226859500023 ER PT J AU Hesketh, K Schlosser, G Porsch, DF Wolf, T Koberl, O Lance, B Chawla, R Gehin, JC Ellis, R Uchikawa, S Sato, O Okubo, T Mineo, H Yamamoto, T Sagayama, Y Sartori, E AF Hesketh, K Schlosser, G Porsch, DF Wolf, T Koberl, O Lance, B Chawla, R Gehin, JC Ellis, R Uchikawa, S Sato, O Okubo, T Mineo, H Yamamoto, T Sagayama, Y Sartori, E TI Plutonium management in the medium term SO NUCLEAR TECHNOLOGY LA English DT Article DE plutonium management; MOX mixed-oxide fuel; OECD/NEA AB For many years various countries with access to commercial reprocessing services have been routinely recycling plutonium as UO2/PuO2 mixed oxide (MOX) fuel in light water reactors (LWRs). This LWR MOX recycle strategy is still widely regarded as an interim step leading to the eventual establishment of sustainable fast reactor fuel cycles. The OECD/NEA Working Party on the Physics of Plutonium Fuels and Innovative Fuel Cycles (WPPR) has recently completed a review of the technical options for plutonium management in what it refers to as the "medium term." For the purpose of the review, the WPPR considers the medium term to cover the period from now up to the point at which fast reactor fuel cycles are established on a commercial scale. The review identified a number of different designs of innovative plutonium fuel assemblies intended to be used in current LWR cores, in LWRs with significantly different moderation properties, as well as in high-temperature gas reactors. The full review report describes these various options and highlights their respective advantages and disadvantages. This paper briefly summarizes the main findings of the review. C1 BNFL, Nucl Sci Serv, Preston PR4 0XJ, Lancs, England. Framatome ANP, Tour AREVA, F-92084 Paris, France. CEA, F-13108 St Paul Les Durance, Bouches Rhone, France. Belgonucleaire, Brussels, Belgium. Paul Scherrer Inst, CH-5232 Villigen, Switzerland. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Japan Atom Energy Res Inst, Kashiwa, Chiba 2770842, Japan. Nucl Power Engn Corp, Minato Ku, Tokyo 1050001, Japan. Japan Nucl Cycle Dev Inst, Tokai, Ibaraki 3191184, Japan. Org Econ Cooperat & Dev, F-75775 Paris 16, France. BNFL, Technol Serv, Preston PR4 OXJ, Lancs, England. RP Hesketh, K (reprint author), BNFL, Nucl Sci Serv, B709 Springfields, Preston PR4 0XJ, Lancs, England. EM Kevin.W.Hesketh@bnfl.com RI Gehin, Jess/E-2560-2011; OI Gehin, Jess/0000-0001-8337-9551; Ellis, Ronald/0000-0002-2800-2644 NR 28 TC 1 Z9 1 U1 1 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD DEC PY 2004 VL 148 IS 3 BP 244 EP 258 PG 15 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 879DZ UT WOS:000225697900003 ER PT J AU Cho, JS Suh, KY Chung, CH Park, RJ Kim, SB AF Cho, JS Suh, KY Chung, CH Park, RJ Kim, SB TI Enhanced natural convection in a metal layer cooled by boiling water SO NUCLEAR TECHNOLOGY LA English DT Article DE natural convection; metal pool; severe accident ID VESSEL LOWER PLENA; BENARD CONVECTION; INTEGRAL ANALYSIS; SEVERE ACCIDENT; HEAT-TRANSFER AB An experimental study is performed to investigate the natural convection heat transfer characteristics and the solidification of the molten metal pool concurrently with forced convective boiling of the overlying coolant to simulate a severe accident in a nuclear power plant. The relationship between the Nusselt number (Nu) and the Rayleigh number (Ra) in the molten metal pool region is determined and compared with the correlations in the literature and experimental data with subcooled water. Given the same Ra condition, the present experimental results for Nu of the liquid metal pool with coolant boiling are found to be higher than those predicted by the existing correlations or measured from the experiment with subcooled boiling. To quantify the observed effect of the external cooling on the natural convection heat transfer rate from the molten pool, it is proposed to include an additional dimensionless group characterizing the temperature gradients in the molten pool and in the external coolant region. Starting from the Globe and Dropkin correlation, engineering correlations are developed for the enhancement of heat transfer in the molten metal pool when cooled by an overlying coolant. The new correlations for predicting natural convection heat transfer are applicable to low-Prandtl-number (Pr) materials that are heated from below and solidified by the external coolant above. Results from this study may be used to modify the current model in severe accident analysis codes. C1 Seoul Natl Univ, Dept Nucl Engn, Seoul 151742, South Korea. Korea Atom Energy Res Inst, Taejon 305353, South Korea. RP Cho, JS (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM chojs@ornl.gov NR 21 TC 6 Z9 6 U1 0 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD DEC PY 2004 VL 148 IS 3 BP 313 EP 324 PG 12 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 879DZ UT WOS:000225697900008 ER PT J AU Joshi, T Chen, Y Becker, JM Alexandrov, N Xu, D AF Joshi, T Chen, Y Becker, JM Alexandrov, N Xu, D TI Genome-scale gene function prediction using multiple sources of high-throughput data in yeast Saccharomyces cerevisiae SO OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY LA English DT Article ID PROTEIN-PROTEIN INTERACTIONS; SEQUENCES; COMPLEXES; PROFILES; ONTOLOGY AB Characterizing gene function is one of the major challenging tasks in the post-genomic era. To address this challenge, we have developed GeneFAS (Gene Function Annotation System), a new integrated probabilistic method for cellular function prediction by combining information from protein-protein interactions, protein complexes, microarray gene expression profiles, and annotations of known proteins through an integrative statistical model. Our approach is based on a novel assessment for the relationship between (1) the interaction/correlation of two proteins' high-throughput data and (2) their functional relationship in terms of their Gene Ontology (GO) hierarchy. We have developed a Web server for the predictions. We have applied our method to yeast Saccharomyces cerevisiae and predicted functions for 1548 out of 2472 unannotated proteins. C1 Univ Missouri, Comp Sci Lab, Digital Biol Lab, Columbia, MO 65211 USA. UT ORNL, Grad Sch Genome Sci & Technol, Oak Ridge, TN USA. Univ Tennessee, Dept Microbiol, Knoxville, TN USA. Univ Tennessee, Dept Biochem, Knoxville, TN USA. Univ Tennessee, Dept Mol & Cellular Biol, Knoxville, TN USA. Ceres Inc, Malibu, CA USA. RP Xu, D (reprint author), Univ Missouri, Comp Sci Lab, Digital Biol Lab, 201 Engn Bldg W, Columbia, MO 65211 USA. EM xudong@missouri.edu NR 27 TC 27 Z9 30 U1 0 U2 1 PU MARY ANN LIEBERT INC PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 USA SN 1536-2310 J9 OMICS JI OMICS PD WIN PY 2004 VL 8 IS 4 BP 322 EP 333 DI 10.1089/omi.2004.8.322 PG 12 WC Biotechnology & Applied Microbiology; Genetics & Heredity SC Biotechnology & Applied Microbiology; Genetics & Heredity GA 899KX UT WOS:000227144400004 PM 15703479 ER PT J AU Murray, JR Soures, JM AF Murray, JR Soures, JM TI Fusion laser engineering SO OPTICAL ENGINEERING LA English DT Editorial Material C1 Lawrence Livermore Natl Lab, Natl Ignit Facil Project, Livermore, CA 94550 USA. Univ Rochester, Laser Energet Lab, Natl Laser Users Facil, Rochester, NY 14623 USA. RP Murray, JR (reprint author), Lawrence Livermore Natl Lab, Natl Ignit Facil Project, POB 808 L-462, Livermore, CA 94550 USA. EM jrmurray65@alum.mit.edu; jsou@lle.rochester.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE-INT SOCIETY OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD DEC PY 2004 VL 43 IS 12 BP 2839 EP 2840 DI 10.1117/1.1829715 PG 2 WC Optics SC Optics GA 884GA UT WOS:000226071600006 ER PT J AU Miller, GH Moses, EI Wuest, CR AF Miller, GH Moses, EI Wuest, CR TI The National Ignition Facility SO OPTICAL ENGINEERING LA English DT Article DE high-energy-density physics; inertial confinement fusion; laboratory astrophysics; solid-state lasers ID LASER-SYSTEM; WAVE-FRONT; FREQUENCY-CONVERSION; FUSED-SILICA; POCKELS CELL; NIF; OPTICS; DAMAGE; PERFORMANCE; FABRICATION AB The National Ignition Facility (NIF) at Lawrence Livermore National Laboratory is a stadium-sized facility that, when completed in 2008, will contain a 192-beam, 1.8-megajoule, 500-teraviatt. ultraviolet laser system together with a 10-m-diam target chamber and room for 100 diagnostics. NIF is the world's largest and most energetic laser experimental system and will provide a scientific center to study inertial confinement fusion and matter at extreme energy densities and pressures. NIF's energetic laser beams will compress fusion targets to conditions required for thermonuclear burn, liberating more energy than required to initiate the fusion reactions. Other NIF experiments will study physical processes at temperatures approaching 10(8) K and 10(11) bar, conditions that exist naturally only in the interior of stars and planets. NIF has completed the first phases of its laser commissioning program. The first four beams of NIF have generated 106 W in 23-ns pulses of infrared light and over 16 kJ in 3.5-ns pulses at the third harmonic (351 nm). NIF's target experimental systems are being commissioned and experiments have begun. This work provides a detailed look at the NIF laser systems, laser and optical performance. and results from recent laser commissioning shots. We follow this with a discussion of NIFs high-energy-density and inertial fusion experimental capabilities. the first experiments on NIF, and plans for future capabilities of this unique facility. 0 2004 Society of Photo-Optical Instrumentation Engineers. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Lawrence Livermore Natl Lab, POB 808 L-466, Livermore, CA 94551 USA. NR 60 TC 164 Z9 174 U1 5 U2 28 PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 0091-3286 EI 1560-2303 J9 OPT ENG JI Opt. Eng. PD DEC PY 2004 VL 43 IS 12 BP 2841 EP 2853 DI 10.1117/1.1814787 PG 13 WC Optics SC Optics GA 884GA UT WOS:000226071600007 ER PT J AU Spaeth, ML Manes, KR Widmayer, CC Williams, WH Whitman, PK Henesian, MA Stowers, IF Honig, J AF Spaeth, ML Manes, KR Widmayer, CC Williams, WH Whitman, PK Henesian, MA Stowers, IF Honig, J TI National Ignition Facility wavefront requirements and optical architecture SO OPTICAL ENGINEERING LA English DT Article DE solid-state lasers; fusion lasers ID INERTIAL-CONFINEMENT FUSION; BASIC FOCAL SPOT; LASER SYSTEMS; PERFORMANCE; PROPAGATION; PULSES AB With the first four of its eventual 192 beams now executing shots and generating more than 100 kJ of laser energy at its primary wavelength of 1.06 mum, the National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory is already the world's largest and most energetic laser. The optical system performance requirements that are in place for NIF are derived from the goals of the missions it is designed to serve. These missions include inertial confinement fusion (ICF) research and the study of matter at extreme energy densities and pressures. These mission requirements have led to a design strategy for achieving high-quality focusable energy and power from the laser and to specifications on optics that are important for an ICF laser. The design of NIF utilizes a multipass architecture with a single large amplifier type that provides high gain, high extraction efficiency, and high packing density. We have taken a systems engineering approach to the practical implementation of this design that specifies the wavefront parameters of individual optics to achieve the desired cumulative performance of the laser beamline. This paper provides a detailed look at the causes and effects of performance degradation in large laser systems and how NIF has been designed to overcome these effects. We also present results of spot size performance measurements that have validated many of the early design decisions that have been incorporated in the NIF laser architecture. (C) 2004 society of Photo-Optical Instrumentation Engineers. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Spaeth, ML (reprint author), Lawrence Livermore Natl Lab, POB 808 L-466, Livermore, CA 94550 USA. RI Whitman, Pamela/B-2336-2013 NR 26 TC 40 Z9 54 U1 4 U2 18 PU SPIE-INT SOCIETY OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD DEC PY 2004 VL 43 IS 12 BP 2854 EP 2865 DI 10.1117/1.1815332 PG 12 WC Optics SC Optics GA 884GA UT WOS:000226071600008 ER PT J AU Bonanno, RE AF Bonanno, RE TI Assembling and installing line-replaceable units for the National Ignition Facility SO OPTICAL ENGINEERING LA English DT Article DE National Ignition Facility; line-replaceable units; beamlines; optomechanical system AB Within the 192 National Ignition Facility (NIF) beamlines, there are more than 7000 large (40 x 40 cm) optical components, including laser glass, mirrors, lenses, and polarizers. These optics are held in large optomechanical assemblies called line-replaceable units (LRUs). Each LRU has strict specifications with respect to cleanliness, alignment, and wavefront so that once activated, each NIF beamline will meet its performance requirements. NIF LRUs are assembled, tested, and refurbished in on-site cleanroom facilities. The assembled LRUs weigh up to 1800 kg, and are about the size of a phone booth. They are transported in portable clean "canisters" and inserted into the NIF beampath using robotic transporters. This plug-and-play design allows LRUs to be easily removed from the beampath for maintenance or upgrades. Commissioning of the first NIF quad, an activity known as NIF Early Light (NEL), has validated LRU designs and architecture, as well as demonstrated that LRUs can be assembled and installed as designed. Furthermore, it has served to develop key processes and tools forming the foundation for NIF's long-term LRU production and maintenance strategy. As we look forward to building out the rest of NIF, the challenge lies in scaling up the production rate while maintaining quality, implementing process improvements, and fully leveraging the learning and experience gained from NEL. This work provides an overview of the facilities, equipment, and processes used to assemble and install LRUs in NIF (C) 2004 Society of Photo-Optical Instrumentation Engineers. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Bonanno, RE (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave,L-466, Livermore, CA 94550 USA. NR 6 TC 5 Z9 6 U1 2 U2 7 PU SPIE-INT SOCIETY OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD DEC PY 2004 VL 43 IS 12 BP 2866 EP 2872 DI 10.1117/1.1815321 PG 7 WC Optics SC Optics GA 884GA UT WOS:000226071600009 ER PT J AU Zacharias, RA Beer, NR Bliss, ES Burkhart, SC Cohen, SJ Sutton, SB Van Atta, RL Winters, SE Salmon, JT Latta, MR Stolz, CJ Pigg, DC Arnold, TJ AF Zacharias, RA Beer, NR Bliss, ES Burkhart, SC Cohen, SJ Sutton, SB Van Atta, RL Winters, SE Salmon, JT Latta, MR Stolz, CJ Pigg, DC Arnold, TJ TI Alignment and wavefront control systems of the National Ignition Facility SO OPTICAL ENGINEERING LA English DT Article DE wavefront control; wavefront correction; adaptive optics; laser alignment; alignment systems; high power lasers ID LASER; NIF AB The National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory is a stadium-sized facility containing a 192-beam Nd glass laser. Its 1.053-mum output is frequency converted to produce 1.8-MJ, 500-TW pulses in the ultraviolet. Refer to the companion overview articles in this issue for more information. High-energy-density and inertial confinement fusion physics experiments require the ability to precisely align and focus pulses with single-beam energy up to 20 KJ and durations of a few nanoseconds onto millimeter-sized targets. NIF's alignment control system now regularly provides automatic alignment of the four commissioned beams prior to every NIF shot in approximately 45 min, and speed improvements are being implemented. NIF utilizes adaptive optics for wavefront control, which significantly improves the ability to tightly focus each laser beam onto a target. Multiple sources of both static and dynamic aberration are corrected. This article provides an overview of the NIF automatic alignment and wavefront control systems, and provides data to show that the facility is expected to meet its primary requirements to position beams on the target with an accuracy of 50 mum rms over the 192 beams and to focus the pulses into a 600-mum spot. (C) 2004 Society of Photo-Optical Instrumentation Engineers. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Johnson Controls Inc, Livermore, CA 94550 USA. RP Zacharias, RA (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA. EM zacharias1@llnl.gov NR 11 TC 52 Z9 62 U1 1 U2 11 PU SPIE-INT SOCIETY OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD DEC PY 2004 VL 43 IS 12 BP 2873 EP 2884 DI 10.1117/1.1615331 PG 12 WC Optics SC Optics GA 884GA UT WOS:000226071600010 ER PT J AU Shaw, M Williams, W House, R Haynam, C AF Shaw, M Williams, W House, R Haynam, C TI Laser performance operations model SO OPTICAL ENGINEERING LA English DT Article DE solid-state lasers; fusion; controls; feedback; modeling ID NATIONAL-IGNITION-FACILITY AB The laser performance operations model (LPOM) is developed to provide real-time predictive capabilities for the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory. LPOk uses diagnostic feedback from previous NIF shots to maintain accurate energetics models for each of the 192 NIF beamlines (utilizing one CPU per laser beamline). This model is used to determine the system setpoints (initial power, waveplate attenuations, laser diagnostic settings) required for all requested NIF shots. In addition, LPOM employs Optical damage models to minimize the probability that a proposed shot may damage the system. LPOM provides postshot diagnostic reporting to support the NIF community. LPOM was deployed prior to the first main laser Awls in NIF, and has since been used to set up every shot in NIFs first quad (four beamlines). Real-time adjustments of the code energetics parameters allow the LPOM to predict total energies within 5%. and provide energy balance within the four beamlines to within 2% for shots varying from 0.5 to 26 kJ (1.053 mum) per beamline. The LPOM has been a crucial tool in the commissioning of the first quad of NIF. (C) 2004 Society Instrumentation Engineers. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Shaw, M (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. EM shaw7@llnl.gov NR 10 TC 16 Z9 16 U1 0 U2 2 PU SPIE-INT SOCIETY OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD DEC PY 2004 VL 43 IS 12 BP 2885 EP 2895 DI 10.1117/1.1815004 PG 11 WC Optics SC Optics GA 884GA UT WOS:000226071600011 ER PT J AU Ermolaeva, GM Eron'yan, MA Dukel'skii, KV Komarov, AV Kondratev, YN Serkov, MM Tolstoy, MN Shilov, VB Shevandin, VS Powell, HT Thompson, CE AF Ermolaeva, GM Eron'yan, MA Dukel'skii, KV Komarov, AV Kondratev, YN Serkov, MM Tolstoy, MN Shilov, VB Shevandin, VS Powell, HT Thompson, CE TI Low-dispersion optical fiber highly transparent in the UV spectral range SO OPTICAL ENGINEERING LA English DT Article DE large-core fibers; subnanosecond pulse; National Ignition Facility; low-dispersion optical fiber ID FORMATION MECHANISM; SILICA; ATTENUATION; BANDWIDTH; GLASS AB The National Ignition Facility performs fusion experiments using ultraviolet (351 nm) light. High-bandwidth, low-attenuation optical fibers are required to transport subnanosecond, UV laser diagnostic signals from the target chamber area to recording instruments located in adjacent rooms, with some fiber runs approximately 65 m in length. Special optical fibers are developed and fabricated to perform this task, since no existing commercially available fibers possess all of the required characteristics. These large-core (435 mum) fibers have optical dispersions less than 0.9 psec/m and attenuations less than 150 dB/km at 351 nm. (C) 2004 Society of Photo-Optical Instrumentation Engineers. C1 SI Vavilov State Opt Inst, St Petersburg 193171, Russia. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Ermolaeva, GM (reprint author), SI Vavilov State Opt Inst, Babushkina St 36-1, St Petersburg 193171, Russia. EM vipspb@online.ru RI Dukel'skii, Konstantin/N-1523-2014 OI Dukel'skii, Konstantin/0000-0002-1627-7499 NR 19 TC 4 Z9 4 U1 0 U2 4 PU SPIE-INT SOCIETY OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD DEC PY 2004 VL 43 IS 12 BP 2896 EP 2903 DI 10.1117/1.1814766 PG 8 WC Optics SC Optics GA 884GA UT WOS:000226071600012 ER PT J AU Honig, J AF Honig, J TI Cleanliness improvements of National Ignition Facility amplifiers as compared to previous large-scale lasers SO OPTICAL ENGINEERING LA English DT Article DE National Ignition Facility; large-scale laser; cleanliness ID INERTIAL CONFINEMENT FUSION; OBSCURATIONS; PERFORMANCE; IMAGES AB Prior to the recent commissioning of the first National Ignition Facility (NIF) beamline, full-scale laser-amplifier-glass cleanliness experiments are performed. Aerosol measurements and obscuration data acquired using a modified flatbed scanner compare favorably to historical large-scale lasers and indicate that NIF is the cleanest large-scale laser built to date. (C) 2004 Society of Photo-Optical Instrumentation Engineers. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Honig, J (reprint author), Lawrence Livermore Natl Lab, 700 East Ave, Livermore, CA 94550 USA. NR 33 TC 6 Z9 14 U1 2 U2 10 PU SPIE-INT SOCIETY OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD DEC PY 2004 VL 43 IS 12 BP 2904 EP 2911 DI 10.1117/1.1815320 PG 8 WC Optics SC Optics GA 884GA UT WOS:000226071600013 ER PT J AU Chan, HY Sari-Sarraf, H Grinstead, BI Gleason, SS AF Chan, HY Sari-Sarraf, H Grinstead, BI Gleason, SS TI Content-based compression of mammograms with fractal-based segmentation and a modified JPEG2000 SO OPTICAL ENGINEERING LA English DT Article DE content-based compression; mammograms; JPEG2000; fractal-based segmentation; region-of-interest coding ID IMAGE COMPRESSION AB We describe a strategy for the content-based compression of mammograms. In this two-step strategy, the clinically important structures are first identified via a fractal-based segmentation method. Then, a modified version of JPEG2000 is applied in such a way that lossless compression is applied to the extracted structures from the first step, while a lossy compression is applied to the remaining regions. Preliminary results demonstrate that this strategy can achieve high compression ratios (up to 50:1) without compromising the diagnostic quality of the mammograms. (C) 2004 Society of Photo-Optical Instrumentation Engineers. C1 Texas Tech Univ, Dept Elect & Comp Engn, Lubbock, TX 79409 USA. Univ Tennessee, Dept Elect & Comp Engn, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Texas Tech Univ, Dept Elect & Comp Engn, Lubbock, TX 79409 USA. EM surene.chan@ttu.edu NR 20 TC 1 Z9 1 U1 0 U2 0 PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 0091-3286 EI 1560-2303 J9 OPT ENG JI Opt. Eng. PD DEC PY 2004 VL 43 IS 12 BP 2986 EP 2993 DI 10.1117/1.1810529 PG 8 WC Optics SC Optics GA 884GA UT WOS:000226071600022 ER PT J AU Soufli, R Spiller, E Schmidt, MA Robinson, JC Baker, SL Ratti, S Johnson, MA Gullikson, EM AF Soufli, R Spiller, E Schmidt, MA Robinson, JC Baker, SL Ratti, S Johnson, MA Gullikson, EM TI Smoothing of diamond-turned substrates for extreme ultraviolet illuminators SO OPTICAL ENGINEERING LA English DT Article DE smoothing; diamond-tumed opticss; mulitilayers; illumination; extreme ultraviolet lithography ID ENGINEERING TEST STAND; OPTICS; PERFORMANCE; GROWTH; SYSTEM; TOOL AB Condenser Optics in extreme ultraviolet lithography (EUVL) systems are subjected to frequent replacement as they are positioned close to the illumination source. where increased heating and contamination occur. In the case of aspherical condenser elements made by optical figuring/finishing, their replacement can be very expensive (several hundred thousand dollars). One approach to this problem would be to manufacture inexpensive illuminator optics that meet all required specifications and could be replaced at no substantial cost. Diamond-turned metal substrates are a factor of 100 less expensive than conventional aspherical substrates but have insufficient finish, leading to unacceptably low EUV reflectance after multilayer coating. We show., that by applying a smoothing film prior to multilayer coating. the high-spatial-frequency roughness of a diamond-tumed metal substrate from 1.76 to 0.27 nm root mean square (rms), while the figure slope error is maintained at acceptable levels. Metrology tests performed at various stages of the fabrication of the element demonstrate that it satisfies all critical figure and finish specifications as an illuminator. Initial experimental results on the stability and performance of the optic in a real EUVL plasma source environment show no accelerated degradation when compared to conventional substrates. (C) 2004 Society of Photo-Optical Instrumentation Engineers. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Soufli, R (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave, Livermore, CA 94550 USA. EM regina.soufli@llnl.gov NR 15 TC 11 Z9 11 U1 2 U2 6 PU SPIE-INT SOCIETY OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD DEC PY 2004 VL 43 IS 12 BP 3089 EP 3095 DI 10.1117/1.1815005 PG 7 WC Optics SC Optics GA 884GA UT WOS:000226071600038 ER PT J AU Maskaly, KR Maskaly, GR Carter, WC Maxwell, JL AF Maskaly, KR Maskaly, GR Carter, WC Maxwell, JL TI Diminished normal reflectivity of one-dimensional photonic crystals due to dielectric interfacial roughness SO OPTICS LETTERS LA English DT Article ID OMNIDIRECTIONAL REFLECTION; SCATTERING; OPTICS AB Dielectric reflectors that are periodic in one dimension, also known as one-dimensional photonic crystals (1DPCs), have become extremely useful tools in the optics industry due to the presence of wavelength-tunable photonic bandgaps. However, little is known about the practical effects of manufacturing defects, such as interfacial roughness, on this technologically useful property of 1DPCs. We employ a finite-difference time-domain code to gain further insight into the effect of interfacial roughness on the reflectivity of quarter-wave-tuned 1DPCs in the center of the bandgap at normal incidence. This provides an estimate of the magnitude of the effect of the roughness for even the most-robust incidence conditions. (C) 2004 Optical Society of America. C1 MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA. Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. RP Maskaly, KR (reprint author), MIT, Dept Mat Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA. EM karlene@mit.edu NR 13 TC 10 Z9 10 U1 1 U2 2 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 DEC 1 PY 2004 VL 29 IS 23 BP 2791 EP 2793 DI 10.1364/OL.29.002791 PG 3 WC Optics SC Optics GA 873LC UT WOS:000225280700031 PM 15605507 ER PT J AU Arsenlis, A Wirth, BD Rhee, M AF Arsenlis, A Wirth, BD Rhee, M TI Dislocation density-based constitutive model for the mechanical behaviour of irradiated Cu SO PHILOSOPHICAL MAGAZINE LA English DT Article ID AUSTENITIC STAINLESS-STEELS; COPPER SINGLE-CRYSTALS; TRANSMISSION ELECTRON-MICROSCOPY; PLASTIC-FLOW LOCALIZATION; NEUTRON-IRRADIATION; DEFECT CLUSTERS; STRUCTURAL-MATERIALS; OFHC-COPPER; BCC METALS; MICROSTRUCTURE AB Performance degradation of structural steels in nuclear environments results from the formation of a high number density of nanometre-scale defects. The defects observed in copper-based alloys are composed of vacancy clusters in the form of stacking fault tetrahedra and/or prismatic dislocation loops that impede the motion of dislocations. The mechanical behaviour of irradiated copper alloys exhibits increased yield strength, decreased total strain to failure and decreased work hardening as compared to their unirradiated behaviour. Above certain critical defect concentrations (neutron doses), the mechanical behaviour exhibits distinct upper yield points. In this paper, we describe the formulation of an internal state variable model for the mechanical behaviour of such materials subject to these (irradiation) environments. This model has been developed within a multiscale materials-modelling framework, in which molecular dynamics simulations of dislocation-radiation defect interactions inform the final coarse-grained continuum model. The plasticity model includes mechanisms for dislocation density growth and multiplication and for irradiation defect density evolution with dislocation interaction. The general behaviour of the constitutive (homogeneous material point) model shows that as the defect density increases, the initial yield point increases and the initial strain hardening decreases. The final coarse-grained model is implemented into a finite element framework and used to simulate the behaviour of tensile specimens with varying levels of irradiation-induced material damage. The simulation results compare favourably with the experimentally observed mechanical behaviour of irradiated materials. C1 Lawrence Livermore Natl Lab, Div Mat Sci & Technol, Livermore, CA 94550 USA. Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA. RP Arsenlis, A (reprint author), Lawrence Livermore Natl Lab, Div Mat Sci & Technol, POB 808,L-371, Livermore, CA 94550 USA. EM arsenlis@llnl.gov RI Wirth, Brian/O-4878-2015 OI Wirth, Brian/0000-0002-0395-0285 NR 46 TC 29 Z9 30 U1 4 U2 20 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1478-6435 J9 PHILOS MAG JI Philos. Mag. PD DEC 1 PY 2004 VL 84 IS 34 BP 3617 EP 3635 DI 10.1080/14786430412331293531 PG 19 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 879JH UT WOS:000225712700001 ER PT J AU Doucette, P Agouris, P Stefanidis, A AF Doucette, P Agouris, P Stefanidis, A TI Automated road extraction from high resolution multispectral imagery SO PHOTOGRAMMETRIC ENGINEERING AND REMOTE SENSING LA English DT Article ID LINEAR FEATURE-EXTRACTION; SNAKES AB This work presents a novel methodology for fully automated road centerline extraction that exploits spectral content from high resolution multispectral images. Preliminary detection of candidate road centerline components is performed with Anti-parallel-edge Centerline Extraction (ACE). This is followed by constructing a road vector topology with a fuzzy grouping model that links nodes from a self-orgonized mapping of the AGE components. Following topology construction, a Self-Supervised Road Classification (SSRC) feedback loop is implemented to automate the process of training sample selection and refinement for a road class, as well as deriving practical spectral definitions for non-road classes. SSRC demonstrates a potential to provide dramatic improvement in road extraction results by exploiting spectral content. Road centerline extraction results are presented for three 1 m color-infrared suburban scenes which show significant improvement following SSRC. C1 Pacific NW Natl Lab, Sequim, WA 98382 USA. Univ Maine, Dept Spatial Informat Sci & Engn, Natl Ctr Geog Informat & Anal, Orono, ME 04469 USA. RP Doucette, P (reprint author), Pacific NW Natl Lab, 1529 W Sequim Bay Rd, Sequim, WA 98382 USA. EM peter.doucette@pnl.gov NR 20 TC 38 Z9 41 U1 0 U2 9 PU AMER SOC PHOTOGRAMMETRY PI BETHESDA PA 5410 GROSVENOR LANE SUITE 210, BETHESDA, MD 20814-2160 USA SN 0099-1112 J9 PHOTOGRAMM ENG REM S JI Photogramm. Eng. Remote Sens. PD DEC PY 2004 VL 70 IS 12 BP 1405 EP 1416 PG 12 WC Geography, Physical; Geosciences, Multidisciplinary; Remote Sensing; Imaging Science & Photographic Technology SC Physical Geography; Geology; Remote Sensing; Imaging Science & Photographic Technology GA 877NP UT WOS:000225577600013 ER PT J AU Yochelis, A Elphick, C Hagberg, A Meron, E AF Yochelis, A Elphick, C Hagberg, A Meron, E TI Two-phase resonant patterns in forced oscillatory systems: boundaries, mechanisms and forms SO PHYSICA D-NONLINEAR PHENOMENA LA English DT Article; Proceedings Paper CT Workshop on Trends in Pattern Formation CY AUG 25-SEP 19, 2003 CL Max Planck Inst Phys Komplexer Syst, Dresden, GERMANY HO Max Planck Inst Phys Komplexer Syst DE resonant pattern; forced oscillatory system; Ginzburg-Landau equation ID BELOUSOV-ZHABOTINSKY REACTION; GLOBAL FEEDBACK; CHEMICAL-SYSTEM; BIFURCATIONS; SYNCHRONIZATION; CONVECTION; EQUATIONS; FRONTS AB We use the forced complex Ginzburg-Landau (CGL) equation to study resonance in oscillatory systems periodically forced at approximately twice the natural oscillation frequency. The CGL equation has both resonant spatially uniform solutions and resonant two-phase standing-wave pattern solutions such as stripes or labyrinths. The spatially uniform solutions form a tongue-shaped region in the parameter plane of the forcing amplitude and frequency. But the parameter range of resonant standing-wave patterns does not coincide with the tongue of spatially uniform oscillations. On one side of the tongue the boundary of resonant patterns is inside the tongue and is formed by the nonequilibrium Ising Bloch bifurcation and the instability to traveling waves. On the other side of the tongue the resonant patterns extend outside the tongue forming a parameter region in which standing-wave patterns are resonant but uniform oscillations are not. The standing-wave patterns in that region appear similar to those inside the tongue but the mechanism of their formation is different. The formation mechanism is studied using a weakly nonlinear analysis near a Hopf-Turing bifurcation. The analysis also gives the existence and stability regions of the standing-wave patterns outside the resonant tongue. The analysis is supported by numerical solutions of the forced complex Ginzburg-Landau equation. (C) 2004 Elsevier B.V. All rights reserved. C1 Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel. Ctr Fis No Lineal & Sistemas Complejos Santiago, Santiago 17122, Chile. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Ben Gurion Univ Negev, BIDR, Dept Solar Energy & Environm Phys, IL-84990 Sede Boqer, Israel. RP Yochelis, A (reprint author), Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel. EM yochelis@bgumail.bgu.ac.il; lelphick@vtr.net; hagberg@lanl.gov; ehud@bgumail.bgu.ac.il RI MERON, EHUD/F-1810-2012; Yochelis, Arik/C-6782-2013 OI Yochelis, Arik/0000-0002-1516-0766 NR 42 TC 14 Z9 14 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2789 J9 PHYSICA D JI Physica D PD DEC 1 PY 2004 VL 199 IS 1-2 BP 201 EP 222 DI 10.1016/j.physd.2004.08.015 PG 22 WC Mathematics, Applied; Physics, Multidisciplinary; Physics, Mathematical SC Mathematics; Physics GA 878DP UT WOS:000225627000018 ER PT J AU Horner, DA Colgan, J Martin, F McCurdy, CW Pindzola, MS Rescigno, TN AF Horner, DA Colgan, J Martin, F McCurdy, CW Pindzola, MS Rescigno, TN TI Symmetrized complex amplitudes for He double photoionization from the time-dependent close-coupling and exterior complex scaling methods SO PHYSICAL REVIEW A LA English DT Article ID DIFFERENTIAL CROSS-SECTIONS; HELIUM AB Symmetrized complex amplitudes for the double photoionization of helium are computed by the time-dependent close-coupling and exterior complex scaling methods, and it is demonstrated that both methods are capable of direct calculation of these amplitudes. The results are found to be in excellent agreement with each other and in very good agreement with results of other ab initio methods and experiments. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Autonoma Madrid, Dept Quim C9, E-28049 Madrid, Spain. Univ Calif Davis, Dept Appl Sci & Chem, Davis, CA 95616 USA. Auburn Univ, Dept Phys, Auburn, AL 36849 USA. RP Horner, DA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM dahorner@lbl.gov; jcolgan@lanl.gov; fernando.martin@uam.es; cwmccurdy@lbl.gov; pindzola@physics.Auburn.edu; tnrescigno@lbl.gov RI Martin, Fernando/C-3972-2014; OI Martin, Fernando/0000-0002-7529-925X; Colgan, James/0000-0003-1045-3858 NR 10 TC 17 Z9 17 U1 0 U2 0 PU AMERICAN 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 DEC PY 2004 VL 70 IS 6 AR 064701 DI 10.1103/PhysRevA.70.064701 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 889BQ UT WOS:000226418900142 ER PT J AU Angst, M Di Castro, D Eshchenko, DG Khasanov, R Kohout, S Savic, IM Shengelaya, A Bud'ko, SL Canfield, PC Jun, J Karpinski, J Kazakov, SM Ribeiro, RA Keller, H AF Angst, M Di Castro, D Eshchenko, DG Khasanov, R Kohout, S Savic, IM Shengelaya, A Bud'ko, SL Canfield, PC Jun, J Karpinski, J Kazakov, SM Ribeiro, RA Keller, H TI Anisotropy and internal-field distribution of MgB2 in the mixed state at low temperatures SO PHYSICAL REVIEW B LA English DT Article ID SINGLE-CRYSTALS; TORQUE MAGNETOMETRY; MAGNESIUM DIBORIDE; SUPERCONDUCTING MGB2; HIGH-PRESSURE; PARAMETERS; GROWTH; GAPS AB Magnetization and muon spin relaxation on MgB2 were measured as a function of the applied magnetic field at 2 K. Both indicate an inverse-squared penetration depth strongly decreasing with increasing field H below about 1 T. Magnetization also suggests the anisotropy of the penetration depth increases with increasing H, interpolating between a low H-c1 and a high H-c2 anisotropy. Measurements of the torque as a function of the angle between the field and the c axis of the crystal are in agreement with this finding, while also ruling out drastic differences between the mixed state anisotropies of the two basic length scales penetration depth and coherence length. C1 Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. Paul Scherrer Inst, CH-5232 Villigen, Switzerland. Univ Geneva, Dept Phys Mat Condensee, CH-1211 Geneva, Switzerland. Univ Belgrade, Fac Phys, YU-11001 Belgrade, Serbia Monteneg. ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland. RP Angst, M (reprint author), Univ Zurich, Inst Phys, Schonberggasse 9, CH-8057 Zurich, Switzerland. EM angst@ameslab.gov RI Ribeiro, Raquel/B-9041-2012; Angst, Manuel/I-4380-2012; Kazakov, Sergey/A-4139-2014; Canfield, Paul/H-2698-2014 OI Ribeiro, Raquel/0000-0001-6075-1701; Angst, Manuel/0000-0001-8892-7019; Kazakov, Sergey/0000-0002-0553-7881; NR 51 TC 27 Z9 27 U1 0 U2 1 PU AMERICAN 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 DEC PY 2004 VL 70 IS 22 AR 224513 DI 10.1103/PhysRevB.70.224513 PG 5 WC Physics, Condensed Matter SC Physics GA 884UJ UT WOS:000226111800094 ER PT J AU Angst, M Puzniak, R Wisniewski, A Roos, J Keller, H Karpinski, J AF Angst, M Puzniak, R Wisniewski, A Roos, J Keller, H Karpinski, J TI Comment on "Superconducting anisotropy and evidence for intrinsic pinning in single crystalline MgB2" SO PHYSICAL REVIEW B LA English DT Editorial Material ID STATE PROPERTIES AB In a recent paper [Phys. Rev. B 66, 012501 (2002)], torque data measured on a MgB2 single crystal in fields from 10 to 60 kOe at 10 K were presented. The authors obtained the anisotropy gamma by fitting a theoretical expression to the data and concluded that the anisotropy is field-independent, gammaapproximate to4.3. In this Comment, we show that the above conclusion does not hold, because it was obtained based on the analysis of torque data measured in fields close to or above the upper critical field H-c2, where the theoretical expression used is not applicable. Furthermore, we argue that the experimental torque data with Hmuch less thanH(c2) indicate an anisotropy strongly increasing with increasing field. C1 ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland. Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland. Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland. RP Angst, M (reprint author), US DOE, Ames Lab, Ames, IA 50011 USA. EM angst@ameslab.gov RI Angst, Manuel/I-4380-2012; Puzniak, Roman/N-1643-2013; Wisniewski, Andrzej/A-1781-2017 OI Angst, Manuel/0000-0001-8892-7019; Puzniak, Roman/0000-0001-5636-5541; NR 16 TC 3 Z9 3 U1 0 U2 2 PU AMERICAN 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 DEC PY 2004 VL 70 IS 22 AR 226501 DI 10.1103/PhysRevB.70.226501 PG 3 WC Physics, Condensed Matter SC Physics GA 884UJ UT WOS:000226111800106 ER PT J AU Awadalla, SA Lynn, KG Wei, SH Szeles, C AF Awadalla, SA Lynn, KG Wei, SH Szeles, C TI Effect of Zn on the cation vacancy-isoelectronic oxygen pair in Cd1-xZnxTe crystals SO PHYSICAL REVIEW B LA English DT Article ID SEMICONDUCTORS; CDTE AB The cation vacancy-isoelectronic oxygen pair (V-Cd/Zn-O-Te) was investigated in Cd1-xZnxTe crystals and compared to it is behavior in CdTe using thermoelectric effect spectroscopy (TEES) and first-principles total-energy calculations. We found that the thermal ionization energy E=E-v+(0.184+/-0.011) eV and trapping cross section sigma=(7+/-4)x10(-17) cm(2) of the (-/-2) transition for the V-Cd-O-Te pair are identical to those found in CdTe. In addition the concentration of the pair is much smaller in Cd1-xZnxTe than in CdTe crystal for samples with the same nominal oxygen concentration. Using first-principles total-energy calculations, we found that under equilibrium growth conditions the lowest achievable formation energy of O-Te is about 0.5 eV higher in CdZnTe than in CdTe. This indicates that the addition of Zn to CdTe reduces the equilibrium substitutional oxygen concentration that can bind with the cation vacancy to form V-Cd/Zn-O-Te. C1 Washington State Univ, Ctr Mat Res, Pullman, WA 99163 USA. Natl Renewable Energy Lab, Golden, CO 80401 USA. eV Prod, Saxonburg, PA 16056 USA. RP Awadalla, SA (reprint author), Washington State Univ, Ctr Mat Res, Pullman, WA 99163 USA. NR 13 TC 0 Z9 0 U1 2 U2 4 PU AMERICAN 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 DEC PY 2004 VL 70 IS 24 AR 245213 DI 10.1103/PhysRevB.70.245213 PG 4 WC Physics, Condensed Matter SC Physics GA 884UN UT WOS:000226112300056 ER PT J AU Barnard, AS Zapol, P AF Barnard, AS Zapol, P TI Effects of particle morphology and surface hydrogenation on the phase stability of TiO2 SO PHYSICAL REVIEW B LA English DT Article ID ANATASE-TO-RUTILE; GEL-SOL METHOD; TOTAL-ENERGY CALCULATIONS; AUGMENTED-WAVE METHOD; X-RAY-DIFFRACTION; TITANIUM-DIOXIDE; NANOCRYSTALLINE ANATASE; ULTRASOFT PSEUDOPOTENTIALS; BASIS-SET; SIZE AB Titanium dioxide nanoparticles are currently receiving a lot of attention due to their inherent suitability for advanced photochemical applications. Size, phase, and morphology of the nanoparticles are the critical parameters determining their performance in particular applications. A thermodynamic model devised to describe the shape of nanoparticles as a function of size has been used to predict the phase stability of titanium dioxide nanoparticles, with particular attention given to the crossover of stability between the anatase and rutile phases. Density functional calculations were used to accurately determine surface energies and surface tensions. The effects of nanocrystal morphology on the phase transition are addressed and comparisons drawn with previously reported studies. Further, the model has been applied to titanium dioxide nanoparticles with hydrogenated surfaces, to investigate the effects of surface passivation on the equilibrium shape and the phase transition, and show that surface passivation has an important impact on nanocrystal morphology and phase stability. The results show that surface hydrogenation induces significant changes in the shape of rutile nanocrystals, but not in anatase, and that the size at which the phase transition may be expected increases dramatically when the under-coordinated surface titanium atoms are H-terminated. C1 Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Barnard, AS (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA. EM amanda.barnard@anl.gov; zapol@anl.gov RI Barnard, Amanda/A-7340-2011; Zapol, Peter/G-1810-2012 OI Barnard, Amanda/0000-0002-4784-2382; Zapol, Peter/0000-0003-0570-9169 NR 64 TC 139 Z9 141 U1 6 U2 76 PU AMERICAN 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 DEC PY 2004 VL 70 IS 23 AR 235403 DI 10.1103/PhysRevB.70.235403 PG 13 WC Physics, Condensed Matter SC Physics GA 884UL UT WOS:000226112100128 ER PT J AU Bronold, FX Saxena, A Smith, DL AF Bronold, FX Saxena, A Smith, DL TI Semiclassical kinetic theory of electron spin relaxation in semiconductors SO PHYSICAL REVIEW B LA English DT Article ID GAAS QUANTUM-WELLS; N-TYPE GAAS; 2-DIMENSIONAL ELECTRONS; GALLIUM-ARSENIDE; FLIP SCATTERING; HETEROSTRUCTURES; ANISOTROPY; PRECESSION; COLLISIONS; MECHANISM AB We develop a semiclassical kinetic theory for electron spin relaxation in semiconductors. Our approach accounts for elastic as well as inelastic scattering and treats Elliott-Yafet and motional-narrowing processes, such as D'yakonov-Perel' and variable g-factor processes, on an equal footing. Focusing on small spin polarizations and small momentum transfer scattering, we derive, starting from the full quantum kinetic equations, a Fokker-Planck equation for the electron spin polarization. We then construct, using a rigorous multiple time scale approach, a Bloch equation for the macroscopic (k-averaged) spin polarization on the long time scale, where the spin polarization decays. Spin-conserving energy relaxation and diffusion, which occur on a fast time scale, after the initial spin polarization has been injected, are incorporated and shown to give rise to a weight function that defines the energy averages required for the calculation of the spin relaxation tensor in the Bloch equation. Our approach provides an intuitive way to conceptualize the dynamics of the spin polarization in terms of a "test" spin polarization that scatters off "field" particles (electrons, impurities, phonons). To illustrate our approach, we calculate for a quantum well the spin lifetime at temperatures and densities where electron-electron and electron-impurity scattering dominate. The spin lifetimes are nonmonotonic functions of temperature and density. Our results show that at electron densities and temperatures where the crossover from the nondegenerate to the degenerate regime occurs, spin lifetimes are particularly long. C1 Ernst Moritz Arndt Univ Greifswald, Inst Phys, D-17487 Greifswald, Germany. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Ernst Moritz Arndt Univ Greifswald, Inst Phys, D-17487 Greifswald, Germany. NR 69 TC 29 Z9 30 U1 3 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 DEC PY 2004 VL 70 IS 24 AR 245210 DI 10.1103/PhysRevB.70.245210 PG 22 WC Physics, Condensed Matter SC Physics GA 884UN UT WOS:000226112300053 ER PT J AU Cao, D Jeong, IK Heffner, RH Darling, T Lee, JK Bridges, F Park, JS Hong, KS AF Cao, D Jeong, IK Heffner, RH Darling, T Lee, JK Bridges, F Park, JS Hong, KS TI Local structure study of the off-center displacement of Ti and Zr across the morphotropic phase boundary of PbZr1-xTixO3 (x=0.40,0.47,0.49,0.55) SO PHYSICAL REVIEW B LA English DT Article ID ABSORPTION FINE-STRUCTURE; SOLID-SOLUTION; TRANSITION; SPECTRA AB X-ray absorption fine structure (XAFS) experiments were carried out on a series of ferroelectric materials PbZr1-xTixO3 (PZT) (x=0.40,0.47,0.49,0.55) to study the local structure around Ti and Zr atoms in each sample. Based on the fact that PZT has a single phase in the morphotropic phase boundary (MPB) from the x-ray diffraction measurements, both extended XAFS (EXAFS) and x-ray absorption near-edge structure results suggest that at 3 K the orientation of the Ti off-center displacement in these materials changes gradually from the [001] to [111] direction (in pseudocubic notation) as the Ti concentration x decreases from 0.55 to 0.40. This is evidence for a continuous rotation of the local electrical polarization across the MPB region in PZT. The Zr K-edge EXAFS data suggest that at low temperature, the ZrO6 octahedra in PZT are less distorted than indicated from the average structure for all samples, though a small Zr displacement relative to the O atoms may exist. This possible small Zr displacement is also much less than that found in density functional theory calculations. The ZrO6 local structure hardly changes with Ti concentration across the MPB region. Finally, the XAFS data also show that the sizes of the ZrO6 octahedra are larger than that of the TiO6 octahedra which was also observed by experimental neutron pair distribution function analysis. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA. Seoul Natl Univ, Sch Mat Sci & Engn, Seoul 151742, South Korea. RP Los Alamos Natl Lab, MS K764, Los Alamos, NM 87545 USA. NR 20 TC 22 Z9 22 U1 0 U2 22 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 DEC PY 2004 VL 70 IS 22 AR 224102 DI 10.1103/PhysRevB.70.224102 PG 7 WC Physics, Condensed Matter SC Physics GA 884UJ UT WOS:000226111800019 ER PT J AU Chattopadhyay, MK Manekar, MA Pecharsky, AO Pecharsky, VK Gschneidner, KA Moore, J Perkins, GK Bugoslavsky, YV Roy, SB Chaddah, P Cohen, LF AF Chattopadhyay, MK Manekar, MA Pecharsky, AO Pecharsky, VK Gschneidner, KA Moore, J Perkins, GK Bugoslavsky, YV Roy, SB Chaddah, P Cohen, LF TI Metastable magnetic response across the antiferromagnetic to ferromagnetic transition in Gd5Ge4 SO PHYSICAL REVIEW B LA English DT Article ID 1ST-ORDER PHASE-TRANSITIONS; DISORDER AB Results of isothermal magnetization and magnetic relaxation measurements are presented probing the nature of the magnetic-field-induced magnetostructural transition in the intermetallic compound Gd5Ge4. This transition shows the characteristics of a disorder-influenced first order transition including distinct metastable behavior. Below approximately 21 K, the transition from the magnetic-field-induced ferromagnetic state back to the antiferromagnetic state shows additional interesting features. Similarities with other classes of magnetic systems exhibiting magnetostructural transitions are pointed out. C1 Ctr Adv Technol, Low Temp Phys Lab, Indore 452013, India. Iowa State Univ, US DOE, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA. Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA. Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, England. RP Chattopadhyay, MK (reprint author), Ctr Adv Technol, Low Temp Phys Lab, Indore 452013, India. EM sbroy@cat.ernet.in NR 26 TC 54 Z9 54 U1 1 U2 9 PU AMERICAN 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 DEC PY 2004 VL 70 IS 21 AR 214421 DI 10.1103/PhysRevB.70.214421 PG 6 WC Physics, Condensed Matter SC Physics GA 884UF UT WOS:000226111400083 ER PT J AU Curro, NJ Young, BL Schmalian, J Pines, D AF Curro, NJ Young, BL Schmalian, J Pines, D TI Scaling in the emergent behavior of heavy-electron materials SO PHYSICAL REVIEW B LA English DT Article ID NUCLEAR MAGNETIC-RESONANCE; KNIGHT-SHIFT; LOW-TEMPERATURES; FERMION SYSTEMS; ANDERSON MODEL; SUPERCONDUCTIVITY; LATTICE; URU2SI2; METALS; STATE AB We show that the NMR Knight shift anomaly exhibited by a large number of heavy electron materials can be understood in terms of the different hyperfine couplings of probe nuclei to localized spins and to conduction electrons. The onset of the anomaly is at a temperature T-*, below which an itinerant component of the magnetic susceptibility develops. This second component characterizes the polarization of the conduction electrons by the local moments and is a signature of the emerging heavy electron state. The heavy electron component grows as log T below T-*, and scales universally for all measured Ce, Yb and U based materials. Our results suggest that T-* is not related to the single ion Kondo temperature, T-K, but rather represents a correlated Kondo temperature that provides a measure of the strength of the intersite coupling between the local moments. Our analysis strongly supports the two-fluid description of heavy electron materials developed by Nakatsuji, Pines and Fisk. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Los Alamos Natl Lab, Inst Complex Adapt Matter, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Illinois, Dept Phys, Urbana, IL 61801 USA. RP Curro, NJ (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Schmalian, Joerg/H-2313-2011; Curro, Nicholas/D-3413-2009 OI Curro, Nicholas/0000-0001-7829-0237 NR 50 TC 89 Z9 90 U1 2 U2 10 PU AMERICAN 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 DEC PY 2004 VL 70 IS 23 AR 235117 DI 10.1103/PhysRevB.70.235117 PG 10 WC Physics, Condensed Matter SC Physics GA 884UL UT WOS:000226112100055 ER PT J AU Davies, JE Hellwig, O Fullerton, EE Denbeaux, G Kortright, JB Liu, K AF Davies, JE Hellwig, O Fullerton, EE Denbeaux, G Kortright, JB Liu, K TI Magnetization reversal of Co/Pt multilayers: Microscopic origin of high-field magnetic irreversibility SO PHYSICAL REVIEW B LA English DT Article ID X-RAY; CURVES; MODEL AB We investigate the magnetization reversal in [Co(4 Angstrom)/Pt(7 A)](50) multilayers with perpendicular magnetic anisotropy both macroscopically by the first-order reversal curve (FORC) technique and microscopically by transmission x-ray microscopy (TXRM) and resonant x-ray small angle scattering (SAS). In particular, we focus on the nucleation and saturation processes. The onset of magnetization reversal is dominated by irreversible processes corresponding to the avalanchelike propagation of one-dimensional stripe domains that originate from earlier nucleated zero-dimensional bubble domains. In a second stage we observe mainly reversible behavior where the overall domain topology is preserved. Finally another irreversible process brings the sample to negative saturation, corresponding to the contraction and annihilation of domains. Interestingly, even well beyond the apparent major-loop saturation field, the FORC diagram exhibits pronounced irreversible switching and thus provides a direct measure of the true (and significantly higher) saturation field. TXRM and SAS measurements reveal on a microscopic level that some residual bubble domains with negligible moments still persist for fields well above the apparent saturation field. These residual domains, if unannihilated, significantly alter the subsequent magnetization reversal. C1 Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. BESSY, D-12489 Berlin, Germany. Hitachi Global Storage Technol, San Jose Res Ctr, San Jose, CA 95120 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. SUNY Albany, Coll Nanoscale Sci & Engn, Albany, NY 12203 USA. RP Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. EM kailiu@ucdavis.edu RI Davies, Joseph/C-4384-2008; Liu, Kai/B-1163-2008; Fullerton, Eric/H-8445-2013 OI Davies, Joseph/0000-0001-5727-2371; Liu, Kai/0000-0001-9413-6782; Fullerton, Eric/0000-0002-4725-9509 NR 24 TC 154 Z9 155 U1 8 U2 58 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 DEC PY 2004 VL 70 IS 22 AR 224434 DI 10.1103/PhysRevB.70.224434 PG 8 WC Physics, Condensed Matter SC Physics GA 884UJ UT WOS:000226111800077 ER PT J AU Dougherty, DB Lyubinetsky, I Einstein, TL Williams, ED AF Dougherty, DB Lyubinetsky, I Einstein, TL Williams, ED TI Distinguishing step relaxation mechanisms via pair correlation functions SO PHYSICAL REVIEW B LA English DT Article ID VICINAL SURFACES; SI(111) STEPS; FLUCTUATIONS; DIFFUSION; DYNAMICS; STM AB Theoretical predictions of coupled step motion are tested by direct STM measurement of the fluctuations of near-neighbor pairs of steps on Si(111)-root3xroot3R30degrees Al at 970 K. The average magnitude of the pair-correlation function is within one standard deviation of zero, consistent with uncorrelated near-neighbor step fluctuations. The time dependence of the pair-correlation function shows no statistically significant agreement with the predicted t(1/2) growth of pair correlations via rate-limiting atomic diffusion between adjacent steps. The physical considerations governing uncorrelated step fluctuations occurring via random attachment/detachment events at the step edge are discussed. C1 Univ Maryland, Dept Phys, College Pk, MD 20742 USA. Univ Maryland, MRSEC, College Pk, MD 20742 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Dougherty, DB (reprint author), Univ Maryland, Dept Phys, College Pk, MD 20742 USA. EM edw@physics.umd.edu OI Einstein, Theodore L./0000-0001-6031-4923 NR 32 TC 8 Z9 8 U1 0 U2 1 PU AMERICAN 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 DEC PY 2004 VL 70 IS 23 AR 235422 DI 10.1103/PhysRevB.70.235422 PG 5 WC Physics, Condensed Matter SC Physics GA 884UL UT WOS:000226112100147 ER PT J AU Escuadro, AA Goodner, DM Okasinski, JS Bedzyk, MJ AF Escuadro, AA Goodner, DM Okasinski, JS Bedzyk, MJ TI X-ray standing wave analysis of the Sn/Si(111)-root 3x root 3 surface SO PHYSICAL REVIEW B LA English DT Article ID CHARGE-DENSITY-WAVE; PHASE-TRANSITION; DYNAMICAL FLUCTUATIONS; SN/GE(111); DEFECTS; SN; RECONSTRUCTIONS; SN/SI(111); SN/GE(III); STM AB The 1/3 monolayer (ML) Sn/Si(111)-(root3xroot3)R30degrees surface structure has been extensively studied using low-energy electron diffraction (LEED) and x-ray standing waves (XSW). The summation of several XSW measured hkl Fourier components provides a three-dimensional, model-independent direct-space image of the Sn atomic distribution. While the image demonstrates that the Sn atoms are located at Si(111) T-4-adsorption sites, it alone can not determine whether or not the Sn atomic distribution is flat or asymmetric. However, conventional XSW analysis can make this distinction, concluding that one-third of the Sn atoms are located 0.26 Angstrom higher than the remaining two-thirds. This "one up and two down" distribution result is consistent with the vertical displacements predicted by a dynamical fluctuations model of the surface. For a second sample with a slightly different surface preparation a root3 LEED pattern was again observed, but in this case the direct space XSW imaging technique clearly revealed that a significant fraction of the Sn atoms were substituting for Si atoms in the bottom of the Si surface bilayer. C1 Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA. Northwestern Univ, Mat Res Ctr, Evanston, IL 60208 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Escuadro, AA (reprint author), Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA. RI Bedzyk, Michael/B-7503-2009; Bedzyk, Michael/K-6903-2013 NR 31 TC 15 Z9 15 U1 0 U2 7 PU AMERICAN 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 DEC PY 2004 VL 70 IS 23 AR 235416 DI 10.1103/PhysRevB.70.235416 PG 7 WC Physics, Condensed Matter SC Physics GA 884UL UT WOS:000226112100141 ER PT J AU Fang, A Howald, C Kaneko, N Greven, M Kapitulnik, A AF Fang, A Howald, C Kaneko, N Greven, M Kapitulnik, A TI Periodic coherence-peak height modulations in superconducting Bi2Sr2CaCu2O8+delta SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTOR; VACUUM TUNNELING SPECTROSCOPY; 2-DIMENSIONAL HUBBARD-MODEL; SPIN-DENSITY-WAVE; T-J MODEL; VORTEX CORES; ELECTRONIC-STRUCTURE; CUPRATE SUPERCONDUCTORS; PHASE-SEPARATION; MAGNETIC-FIELD AB In this paper we analyze, using scanning tunneling spectroscopy (STS), the local density of electronic states (LDOS) in nearly optimally doped Bi2Sr2CaCu2O8+delta in zero magnetic field. We see both dispersive and nondispersive spatial LDOS modulations as a function of energy in our samples. Moreover, a spatial map of the superconducting coherence peak heights shows the same structure as the low-energy LDOS. This suggests that these nondispersive LDOS modulations originate from an underlying charge-density modulation, which interacts with superconductivity. C1 Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA. Stanford Univ, Dept Phys, Stanford, CA 94305 USA. Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA. RP Fang, A (reprint author), Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA. NR 52 TC 56 Z9 56 U1 0 U2 2 PU AMERICAN 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 DEC PY 2004 VL 70 IS 21 AR 214514 DI 10.1103/PhysRevB.70.214514 PG 8 WC Physics, Condensed Matter SC Physics GA 884UF UT WOS:000226111400115 ER PT J AU Gao, F Bylaska, EJ Weber, WJ AF Gao, F Bylaska, EJ Weber, WJ TI Intrinsic defect properties in GaN calculated by ab initio and empirical potential methods SO PHYSICAL REVIEW B LA English DT Article ID GALLIUM NITRIDE; NATIVE DEFECTS; RELAXATION; ENERGIES; ELECTRON AB Density functional theory (DFT) has been used to investigate the formation, properties, and atomic configurations of vacancies, antisite defects and interstitials in GaN, and the DFT results are compared with those calculated by molecular dynamics simulations using two representative potentials. The DFT calculations reveal that the relaxation of vacancies is generally small, but the relaxation around antisite defects is large, especially for the Ga antisite that is not stable and converts to a N+-N[0001] split interstitial plus a Ga vacancy at the original site. The N interstitials, starting from all possible sites, eventually relax into a N+- N[11 (2) over bar0] split interstitial. In the case of Ga interstitials, the most stable configuration is a Ga octahedral interstitial, but the energy difference among all the interstitials is small. The Ga+-Ga[11 (2) over bar0] split interstitial can bridge the gap between nonbonded Ga atoms, thereby leading to a chain of four Ga atoms along the [11 (2) over bar0] direction in GaN. The formation energies of vacancies and antisite defects obtained using the Stillinger-Weber (SW) potential are in reasonable agreement with those obtained by DFT calculations, whereas the Tersoff-Brenner (TB) potential better describes the behavior of N interstitials. In the case of Ga interstitials, the most stable configuration predicted by the TB model is a Ga+-N[11 (2) over bar0] split interstitial; while for the SW model the Ga tetrahedral configuration is more stable, which is in contrast to DFT results. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Gao, F (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA. EM fei.gao@pnl.gov RI Weber, William/A-4177-2008; Gao, Fei/H-3045-2012 OI Weber, William/0000-0002-9017-7365; NR 30 TC 31 Z9 31 U1 0 U2 14 PU AMERICAN 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 DEC PY 2004 VL 70 IS 24 AR 245208 DI 10.1103/PhysRevB.70.245208 PG 8 WC Physics, Condensed Matter SC Physics GA 884UN UT WOS:000226112300051 ER PT J AU He, FZ Wells, BO Ban, ZG Alpay, SP Grenier, S Shapiro, SM Si, WD Clark, A Xi, XX AF He, FZ Wells, BO Ban, ZG Alpay, SP Grenier, S Shapiro, SM Si, WD Clark, A Xi, XX TI Structural phase transition in epitaxial perovskite films SO PHYSICAL REVIEW B LA English DT Article ID SRTIO3 THIN-FILMS; METAL-INSULATOR-TRANSITION; STRONTIUM-TITANATE; POLYDOMAIN HETEROSTRUCTURES; INDUCED FERROELECTRICITY; GROWTH; NDNIO3; SRRUO3; THERMODYNAMICS; RELAXATION AB Three different film systems have been systematically investigated to understand the effects of strain and substrate constraint on the phase transitions of perovskite films. In SrTiO3 films, the phase transition temperature T-c was determined by monitoring the superlattice peaks associated with rotations of TiO6 octahedra. It is found that T-c depends on both SrTiO3 film thickness and SrRuO3 buffer layer thickness. However, lattice parameter measurements showed no sign of the phase transitions, indicating that the tetragonality of the SrTiO3 unit cells was no longer a good order parameter. This signals a change in the nature of this phase transition, the internal degree of freedom is decoupled from the external degree of freedom. The phase transitions occur even without lattice relaxation through domain formation. In NdNiO3 thin films, it is found that the in-plane lattice parameters were clamped by the substrate, while the out-of-plane lattice constant varied to accommodate the volume change across the phase transition. This shows that substrate constraint is an important parameter for epitaxial film systems, and is responsible for the suppression of external structural change in SrTiO3 and NdNiO3 films. However, in SrRuO3 films we observed domain formation at elevated temperature through x-ray reciprocal space mapping. This indicated that internal strain energy within films also played an important role, and may dominate in some film systems. The final strain states within epitaxial films were the result of competition between multiple mechanisms and may not be described by a single parameter. C1 Univ Connecticut, Dept Phys, Storrs, CT 06269 USA. Univ Connecticut, Dept Mat Sci & Engn, Storrs, CT 06269 USA. Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Penn State Univ, Dept Phys, University Pk, PA 16802 USA. RP He, FZ (reprint author), Univ Connecticut, Dept Phys, Storrs, CT 06269 USA. EM fhe@phys.uconn.edu RI Alpay, Pamir/E-2666-2013; Grenier, Stephane/N-1986-2014; He, Feizhou/G-8493-2015 OI Grenier, Stephane/0000-0001-8370-7375; He, Feizhou/0000-0002-3125-1406 NR 37 TC 59 Z9 59 U1 1 U2 48 PU AMERICAN 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 DEC PY 2004 VL 70 IS 23 AR 235405 DI 10.1103/PhysRevB.70.235405 PG 10 WC Physics, Condensed Matter SC Physics GA 884UL UT WOS:000226112100130 ER PT J AU He, LX Bester, G Zunger, A AF He, LX Bester, G Zunger, A TI Strain-induced interfacial hole localization in self-assembled quantum dots: Compressive InAs/GaAs versus tensile InAs/InSb SO PHYSICAL REVIEW B LA English DT Article ID ELECTRONIC-STRUCTURE; PARAMAGNETIC RESONANCE; CRYSTALS; CYCLOTRON; ALLOYS; ENERGY AB Using an atomistic pseudopotential approach, we study how the shape of the dot (spherical vs lens shaped) affects the position-dependent strain and the electronic properties of tensile (InAs/InSb) and compressive (InAs/GaAs) quantum dots. We compare the strain profiles, strained modified band offsets, confined levels, and atomistic wave functions of these dots. We show (i) how the existence of position-dependent strain in nonflat heterostructures can control the electronic properties, leading, for example, to interfacial localization of hole states on the interface of matrix-embedded dots and (ii) how the dots shape can control the level sequence and degeneracy. For example in spherical dots, one finds degenerate light-hole (LH) and heavy-hole (HH) states, whereas in lens-shaped dots one can have as the highest-occupied hole state either (a) a LH state inside the dot, becoming a HH state outside the dot (InAs/InSb tensile case) or (b) a HH state inside the dot, becoming a LH states outside the dot (InAs/GaAs compressive case). C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP He, LX (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. EM alex_zunger@nrel.gov RI Bester, Gabriel/I-4414-2012; Zunger, Alex/A-6733-2013 OI Bester, Gabriel/0000-0003-2304-0817; NR 25 TC 44 Z9 44 U1 1 U2 10 PU AMERICAN 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 DEC PY 2004 VL 70 IS 23 AR 235316 DI 10.1103/PhysRevB.70.235316 PG 9 WC Physics, Condensed Matter SC Physics GA 884UL UT WOS:000226112100095 ER PT J AU Hucker, M Kataev, V Pommer, J Ammerahl, U Revcolevschi, A Tranquada, JM Buchner, B AF Hucker, M Kataev, V Pommer, J Ammerahl, U Revcolevschi, A Tranquada, JM Buchner, B TI Dzyaloshinsky-Moriya spin canting in the low-temperature tetragonal phase of La2-x-yEuySrxCuO4 SO PHYSICAL REVIEW B LA English DT Article ID ANISOTROPIC SUPEREXCHANGE INTERACTION; SQUARE-LATTICE ANTIFERROMAGNET; SINGLE-CRYSTAL LA2-XSRXCUO4; EARTH-DOPED LA2-XSRXCUO4; WEAK FERROMAGNETISM; NEUTRON-SCATTERING; MAGNETIC-SUSCEPTIBILITY; COPPER OXIDES; NORMAL-STATE; LA-139 NQR AB Magnetization measurements in magnetic fields up to 14 Tesla have been used to study the magnetism of the Cu spins in La2-x-yEuySrxCuO4 (xless than or equal to0.17; yless than or equal to0.2). This system exhibits weak ferromagnetism due to a combination of the Dzyaloshinsky-Moriya interaction and tilting of the CuO6 octahedra. In the low-temperature orthorhombic (LTO) phase, the magnetic structure is the same as in the LTO phase of pure La2-xSrxCuO4; however, the Eu-doped system also exhibits low-temperature transitions to structural phases with different octahedral tilt patterns. There has been a long-standing debate about whether the spin-canting of the LTO phase continues to exist in the low-temperature tetragonal (LTT) phase. In contrast to theoretical predictions, our results clearly show that Cu spin canting is present in the LTT phase (within the antiferromagnetic regime) as well as in an intermediate low-temperature less-orthorhombic (LTLO) phase. Moreover, in La1.8Eu0.2CuO4 the canted moment is about 50% larger than in pure La2CuO4, which we attribute to the larger tilt angle of the octahedra in the Eu-doped compound. We also find clear evidence that the size of the canted moment does not change significantly at the structural transition itself. The most important change induced by the transition is a significant reduction of the magnetic coupling between the CuO2 planes. As a consequence, the spin-flip for magnetic field perpendicular to the CuO2 planes, which is the most characteristic fingerprint of the canted Cu spin structure in the LTO phase, disappears in the LTT phase. The shape of the magnetization curves changes from the well known spin-flip type to a weak-ferromagnet type. However, no spontaneous weak ferromagnetism is observed even at very low temperatures, which seems to indicate that the interlayer decoupling in our samples is not perfect. Nonetheless, a small fraction (less than or similar to15%) of the canted Cu spin moments can be remanently magnetized throughout the entire antiferromagnetically ordered LTT/LTLO phase, i.e., for Tless than or similar to135 K and x<0.02. It appears that the remanent canted moment is perpendicular to the CuO2 planes. A small number of experiments were performed with the magnetic field applied parallel to the CuO2 planes, where in pure La2CuO4 a spin-flop transition was observed. We find that in La1.8Eu0.2CuO4 the critical field of the spin-flop seems to decrease in the LTLO phase, which might indicate a competition between different in-plane anisotropies. To study the Cu spin magnetism in La2-x-yEuySrxCuO4, a careful analysis of the Van Vleck paramagnetism of the Eu3+ ions was performed. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany. Univ Paris 11, Lab Chim Solides, F-91405 Orsay, France. Inst Festkorper & Werkstofforsch Dresden, D-01171 Dresden, Germany. RP Hucker, M (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RI Tranquada, John/A-9832-2009; Buchner, Bernd/E-2437-2016 OI Tranquada, John/0000-0003-4984-8857; Buchner, Bernd/0000-0002-3886-2680 NR 87 TC 17 Z9 17 U1 4 U2 13 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD DEC PY 2004 VL 70 IS 21 AR 214515 DI 10.1103/PhysRevB.70.214515 PG 21 WC Physics, Condensed Matter SC Physics GA 884UF UT WOS:000226111400116 ER PT J AU Hucker, M Klauss, HH Buchner, B AF Hucker, M Klauss, HH Buchner, B TI Strong dependence of the interlayer coupling on the hole mobility in antiferromagnetic La2-xSrxCuO4 (x < 0.02) SO PHYSICAL REVIEW B LA English DT Article ID MAGNETIC PHASE-DIAGRAM; LA-139 NQR; FERROMAGNETISM; SUPPRESSION; LA2CUO4; ORDER AB We have studied the magnetic coupling between the CuO2 planes in the antiferromagnetic (AF) phase of Sr- and Zn-doped La2CuO4 by analyzing the spin-flip transition in the magnetization curves. We find that the interlayer coupling plays a key role in the suppression of the AF phase, and that only mobile holes cause a strong frustration of the interlayer coupling. Depending on the hole mobility, samples with identical Neel temperature can have a very different interlayer coupling. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. TU Braunschweig, D-38106 Braunschweig, Germany. Inst Festkorper & Werkstoffforsch Dresden, D-01171 Dresden, Germany. Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany. RP Hucker, M (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RI Klauss, Hans-Henning/G-4743-2010; Buchner, Bernd/E-2437-2016 OI Buchner, Bernd/0000-0002-3886-2680 NR 15 TC 11 Z9 11 U1 1 U2 3 PU AMERICAN 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 DEC PY 2004 VL 70 IS 22 AR 220507 DI 10.1103/PhysRevB.70.220507 PG 4 WC Physics, Condensed Matter SC Physics GA 884UJ UT WOS:000226111800017 ER PT J AU Ibrahim, K Qian, HJ Wu, X Abbas, MI Wang, JO Hong, CH Su, R Zhong, J Dong, YH Wu, ZY Wei, L Xian, DC Li, YX Lapeyre, GJ Mannella, N Fadley, CS Baba, Y AF Ibrahim, K Qian, HJ Wu, X Abbas, MI Wang, JO Hong, CH Su, R Zhong, J Dong, YH Wu, ZY Wei, L Xian, DC Li, YX Lapeyre, GJ Mannella, N Fadley, CS Baba, Y TI O 2p hole-assisted electronic processes in the Pr1-xSrxMnO3 (x=0.0, 0.3) system SO PHYSICAL REVIEW B LA English DT Article ID DOUBLE EXCHANGE; PHOTOEMISSION BEHAVIOR; K-EDGE; MANGANITES; SPECTROSCOPY; TRANSPORT; FILMS AB Experimental results, by x-ray absorption (XAS) at the oxygen K-edge and photon-energy dependence of the O 1s2p2p Auger line at the O K threshold, below Mn L-2,L-3 as well as well above the Mn L-2,L-3 edge of colossal magnetoresistance (CMR) manganites Pr1-xSrxMnO3 (PSMO) with x=0.0 and x=0.3 compositions, demonstrate the existence of an oxygen 2p hole state and show its importance in the electronic processes. Both XAS and Auger spectra self-consistently manifest that the oxygen 2p holes density of state (DOS) increases with hole doping in the PSMO system, hinting at a hole state transfer from e(g) symmetry orbitals of Mn 3d valence bands to oxygen 2p with a Mn4+ ion increase through Sr2+ doping. These are discussed in terms of the possible interatomic hybridization of Mn 3d with O 2p orbitals and a different O 2p valence band DOS for different PSMO compositions in the frame of a covalent picture. C1 Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China. Hebei Univ Technol, Ctr Magnet Mat & Magnet Technol, Tianjin 300130, Peoples R China. Montana State Univ, Dept Phys, Bozeman, MT 59717 USA. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA. Japan Atom Energy Res Inst, Synchrotron Radiat Res Ctr, Tokai, Ibaraki 3191195, Japan. RP Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China. RI Abbas, Mamatimin/D-2712-2013; OI Abbas, Mamatimin/0000-0003-0222-5994 NR 32 TC 8 Z9 8 U1 1 U2 8 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 DEC PY 2004 VL 70 IS 22 AR 224433 DI 10.1103/PhysRevB.70.224433 PG 9 WC Physics, Condensed Matter SC Physics GA 884UJ UT WOS:000226111800076 ER PT J AU Kalinin, SV Bonnell, DA AF Kalinin, SV Bonnell, DA TI Local electronic transport at grain boundaries in Nb-doped SrTiO3 SO PHYSICAL REVIEW B LA English DT Article ID FORCE MICROSCOPY; ATOMIC-STRUCTURE; SURFACE; MANGANITES; MAGNETORESISTANCE; SEMICONDUCTORS; INTERFACE; CERAMICS; TITANATE; CHARGES AB The local electrostatic properties and electronic transport at Sigma5 grain boundaries in donor-doped SrTiO3 bicrystals are examined using a combination of scanning probe microscopy (SPM) techniques and impedance spectroscopy. A combination of scanning surface potential microscopy (SSPM) and scanning impedance microscopy is used to determine intrinsic current-voltage and capacitance-voltage characteristics of the interface, eliminating the bulk and contact contributions. Conductive atomic force microscopy is used to directly image the depletion barrier associated with the grain boundary. The sign of the grain boundary potential is unambiguously determined by SSPM once the mobile charge effect is taken into account. A combination of SPM and impedance spectroscopy allowed the effect of grain boundary on local static and frequency dependent transport properties to be established. C1 Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA. RP Kalinin, SV (reprint author), Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RI Kalinin, Sergei/I-9096-2012 OI Kalinin, Sergei/0000-0001-5354-6152 NR 48 TC 21 Z9 21 U1 2 U2 20 PU AMERICAN 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 DEC PY 2004 VL 70 IS 23 AR 235304 DI 10.1103/PhysRevB.70.235304 PG 10 WC Physics, Condensed Matter SC Physics GA 884UL UT WOS:000226112100083 ER PT J AU Kos, S Millis, AJ Larkin, AI AF Kos, S Millis, AJ Larkin, AI TI Gaussian fluctuation corrections to the BCS mean-field gap amplitude at zero temperature SO PHYSICAL REVIEW B LA English DT Article ID SUPERCONDUCTORS; CONDUCTIVITY AB The leading (Gaussian) fluctuation correction to the weak coupling zero temperature Bardeen-Cooper-Schreiffer superconducting gap equation is computed. We find that the dominant contribution comes from the high energies and momenta (compared to the gap) and gives a correction smaller by the weak-coupling factor gN(0) than the mean-field terms. This correction is small due to cancellation of singular contributions from the amplitude and phase mode at high energies and momenta. C1 Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Columbia Univ, Dept Phys, New York, NY 10027 USA. Univ Minnesota, Sch Phys & Astron, William I Fine Theoret Phys Inst, Minneapolis, MN 55455 USA. RP Kos, S (reprint author), Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. RI Kos, Simon/G-3289-2016 OI Kos, Simon/0000-0003-1657-9793 NR 15 TC 0 Z9 0 U1 0 U2 3 PU AMERICAN 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 DEC PY 2004 VL 70 IS 21 AR 214531 DI 10.1103/PhysRevB.70.214531 PG 6 WC Physics, Condensed Matter SC Physics GA 884UF UT WOS:000226111400132 ER PT J AU Kucheyev, SO Bostedt, C van Buuren, T Willey, TM Land, TA Terminello, LJ Felter, TE Hamza, AV Demos, SG Nelson, AJ AF Kucheyev, SO Bostedt, C van Buuren, T Willey, TM Land, TA Terminello, LJ Felter, TE Hamza, AV Demos, SG Nelson, AJ TI Electronic structure of KD2xH2(1-x)PO4 studied by soft x-ray absorption and emission spectroscopies SO PHYSICAL REVIEW B LA English DT Article ID FERROELECTRIC TRANSITION; ULTRAVIOLET REFLECTION; KH2PO4 CRYSTALS; CORE EXCITONS; KDP; EDGE; TEMPERATURE; PARAMETERS; COEFFICIENT; DEUTERIUM AB The surface and bulk electronic structure of tetragonal (at 300 K) and orthorhombic (at 77 K) KD2xH2(1-x)PO4 single crystals (so-called KDP and DKDP), with a deuteration degree x of 0.0, 0.3, and 0.6, is studied by soft x-ray absorption near-edge structure (XANES) and x-ray emission (XES) spectroscopies. High-resolution O K-edge, P L-2,L-3-edge, and K L-2,L-3-edge XANES and XES spectra reveal that the element-specific partial density of states in the conduction and valence bands is essentially independent of deuteration x. We give assignment of XANES and XES peaks based on previous molecular orbital and band-structure calculations. Projected densities of states in the conduction band also appear to be essentially identical for tetragonal (at 300 K) and orthorhombic (at 77 K) phases, consistent with previous band structure calculations. However, a decrease in sample temperature from 300 to 77 K results in measurable changes to the valence band (probed by XES) but not to the conduction band (probed by XANES). The lower limit on the room-temperature band gap of KDP and DKDP is estimated as similar to7.6 eV. Results also show that high-intensity x-ray irradiation results in decomposition of these hydrogen-bonded materials into water and KPO3 cyclophosphates and polyphosphates. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Kucheyev, SO (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM kucheyev1@llnl.gov RI Willey, Trevor/A-8778-2011 OI Willey, Trevor/0000-0002-9667-8830 NR 57 TC 15 Z9 15 U1 3 U2 11 PU AMERICAN 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 DEC PY 2004 VL 70 IS 24 AR 245106 DI 10.1103/PhysRevB.70.245106 PG 9 WC Physics, Condensed Matter SC Physics GA 884UN UT WOS:000226112300024 ER PT J AU Kumar, RS Cornelius, AL Sarrao, JL AF Kumar, RS Cornelius, AL Sarrao, JL TI Compressibility of CeMIn5 and Ce2MIn8 (M=Rh, Ir, and Co) compounds SO PHYSICAL REVIEW B LA English DT Article ID HEAVY-FERMION SUPERCONDUCTIVITY; HIGH-PRESSURE; ELECTRONIC-STRUCTURE; UNCONVENTIONAL SUPERCONDUCTIVITY; PHYSICAL-PROPERTIES; MAGNETIC-STRUCTURE; KONDO-LATTICE; CETIN5 T; CERHIN5; DEPENDENCE AB The lattice parameters of the tetragonal compounds CeMIn5 and Ce2MIn8 (M=Rh, Ir, and Co) have been studied as a function of pressure up to 15 GPa using a diamond anvil cell under both hydrostatic and quasihydrostatic conditions at room temperature. The addition of MIn2 layers to the parent CeIn3 compound is found to stiffen the lattice as the 2-layer systems (average of bulk modulus values B-0 is 70.4 GPa) have a larger B-0 than CeIn3 (67 GPa), while the 1-layer systems are even stiffer (average of B-0 is 81.4 GPa). Estimating the hybridization using parameters from tight binding calculations shows that the dominant hybridization is fp in nature between the Ce and In atoms. The values of V-pf at the pressure where the superconducting transition temperature T-c reaches a maximum is the same for all CeMIn5 compounds. By plotting the maximum values of the superconducting transition temperature T-c versus c/a for the studied compounds and Pu-based superconductors, we find a universal T-c versus c/a behavior when these quantities are normalized appropriately. These results are consistent with magnetically mediated superconductivity. C1 Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA. Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. RP Kumar, RS (reprint author), Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA. RI Cornelius, Andrew/A-9837-2008; OI Kumar, Ravhi/0000-0002-1967-1619 NR 58 TC 19 Z9 19 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 DEC PY 2004 VL 70 IS 21 AR 214526 DI 10.1103/PhysRevB.70.214526 PG 8 WC Physics, Condensed Matter SC Physics GA 884UF UT WOS:000226111400127 ER PT J AU Landa, A Soderlind, P Ruban, A Vitos, L Pourovskii, L AF Landa, A Soderlind, P Ruban, A Vitos, L Pourovskii, L TI First-principles phase diagram of the Ce-Th system SO PHYSICAL REVIEW B LA English DT Article ID GENERALIZED GRADIENT APPROXIMATION; CRYSTAL-STRUCTURES; BRILLOUIN-ZONE; SPECIAL POINTS; ALLOY SYSTEM; CERIUM; GPA; METALS AB Ab initio total energy calculations based on the exact muffin-tin orbitals (EMTO) theory are used to determine the high pressure and low-temperature phase diagram of Ce and Th metals as well as the Ce(43)Th(57) disordered alloy. The compositional disorder for the alloy is treated in the framework of the coherent potential approximation. The equation of state for Ce, Th, and Ce(43)Th(57) has been calculated up to 1 Mbar in good comparison with experimental data: upon compression the Ce-Th system undergoes crystallographic phase transformation from a fcc to a body-centered-tetragonal structure and the transition pressure increases with Th content in the alloy. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Royal Inst Technol, Dept Mat Sci & Engn, SE-10044 Stockholm, Sweden. Res Inst Solid State Phys & Opt, H-1525 Budapest, Hungary. Univ Nijmegen, Dept Theoret Phys, NL-6525 ED Nijmegen, Netherlands. RP Landa, A (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. RI Ruban, Andrei/B-7457-2012; Poyurovskiy, Leonid/F-1764-2015 NR 29 TC 9 Z9 10 U1 1 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 DEC PY 2004 VL 70 IS 22 AR 224210 DI 10.1103/PhysRevB.70.224210 PG 5 WC Physics, Condensed Matter SC Physics GA 884UJ UT WOS:000226111800036 ER PT J AU Lin, JF Struzhkin, VV Mao, HK Hemley, RJ Chow, P Hu, MY Li, J AF Lin, JF Struzhkin, VV Mao, HK Hemley, RJ Chow, P Hu, MY Li, J TI Magnetic transition in compressed Fe3C from x-ray emission spectroscopy SO PHYSICAL REVIEW B LA English DT Article ID HIGH-PRESSURE; EQUATION; STATE; CORE; SPIN; TEMPERATURE; CEMENTITE; CARBON; ALPHA; GPA AB The magnetic properties of iron in cementite (Fe3C) have been measured by x-ray emission spectroscopy in a diamond cell up to 45 GPa. The Fe-K-beta fluorescence peaks reveal that Fe3C undergoes a magnetic collapse at approximately 25 GPa, consistent with theoretical predictions. This transition is likely to be a second-order phase transition without a major structural change. The magnetic collapse transition is expected to affect the elastic and thermodynamic properties of Fe3C; the nonmagnetic phase predicted theoretically has a higher incompressibility and density than the magnetic state. Our results support recent theoretical and thermodynamic calculations indicating that Fe3C is unlikely to be the major component in the Earth's inner core. C1 Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA. Argonne Natl Lab, HPCAT, Carnegie Inst Washington, Adv Photon Source, Argonne, IL 60439 USA. Univ Illinois, Dept Geol, Urbana, IL 61801 USA. RP Lin, JF (reprint author), Carnegie Inst Washington, Geophys Lab, 5251 Broad Branch Rd NW, Washington, DC 20015 USA. RI Lin, Jung-Fu/B-4917-2011; Struzhkin, Viktor/J-9847-2013 OI Struzhkin, Viktor/0000-0002-3468-0548 NR 22 TC 35 Z9 35 U1 0 U2 8 PU AMERICAN 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 DEC PY 2004 VL 70 IS 21 AR 212405 DI 10.1103/PhysRevB.70.212405 PG 4 WC Physics, Condensed Matter SC Physics GA 884UF UT WOS:000226111400011 ER PT J AU Liu, ZY Yue, LP Keavney, DJ Adenwalla, S AF Liu, ZY Yue, LP Keavney, DJ Adenwalla, S TI Oscillatory interlayer exchange coupling in [Pt/Co](n)/NiO/[Co/Pt](n) multilayers with perpendicular anisotropy: Dependence on NiO and Pt layer thicknesses SO PHYSICAL REVIEW B LA English DT Article ID FERROMAGNETIC LAYERS; CO/PT MULTILAYERS; MAGNETIC-PROPERTIES; FE LAYERS; SUPERLATTICES; ENHANCEMENT; SPACER; PERIOD; CO/RU; COERCIVITY AB Interlayer exchange coupling has been studied in a series of [Pt(t(Pt) Angstrom)/Co(4 Angstrom)](n)/NiO(t(NiO))/[Co(4 Angstrom)/Pt(t(Pt) Angstrom)](n) multilayers with perpendicular anisotropy. The coupling oscillates between antiferromagnetic and ferromagnetic as a function of t(NiO) with a period of similar to5 Angstrom, and the oscillatory behavior is related to the antiferromagnetic ordering of the NiO layer. This interlayer coupling between two Co/Pt multilayers is shown to occur domain by domain by magnetic force microscopy imaging. For the strongest antiferromagnetic coupling at t(NiO)=11 Angstrom, an oscillation with a period of similar to6 Angstrom is superposed onto the exponential decay of the coupling strength as a function of t(Pt). The exponential decay with t(Pt) is ascribed to the exponential decay of the coupling between the Co layers across the Pt layers in each Co/Pt multilayer, and the superposed oscillatory behavior can be attributed to multiple reflections of electron waves at the Co/Pt interfaces and their interference. A linear dependence of the antiferromagnetic coupling strength on 1/n, (where n is the number of repeats), is suggestive of a surface interaction for this interlayer coupling. C1 Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA. Univ Nebraska, Ctr Mat Res & Anal, Lincoln, NE 68588 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA. EM sadenwal@unlserve.unl.edu NR 52 TC 26 Z9 26 U1 3 U2 16 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 DEC PY 2004 VL 70 IS 22 AR 224423 DI 10.1103/PhysRevB.70.224423 PG 10 WC Physics, Condensed Matter SC Physics GA 884UJ UT WOS:000226111800066 ER PT J AU Lorenz, B Wang, YQ Sun, YY Chu, CW AF Lorenz, B Wang, YQ Sun, YY Chu, CW TI Large magnetodielectric effects in orthorhombic HoMnO3 and YMnO3 SO PHYSICAL REVIEW B LA English DT Article ID RARE-EARTH ORTHOMANGANITES; MAGNETIC-STRUCTURE; PEROVSKITE AB We have found a remarkable increase (up to 60%) of the dielectric constant with the onset of magnetic order at 42 K in the metastable orthorhombic structures of YMnO3 and HoMnO3 that proves the existence of a strong magnetodielectric coupling in the compounds. Magnetic, dielectric, and thermodynamic properties show distinct anomalies at the onset of the incommensurate magnetic order and thermal hysteresis effects are observed around the lock-in transition temperature at which the incommensurate magnetic order locks into a temperature independent wave vector. The Mn3+ spins and Ho3+ moments both contribute to the magnetodielectric coupling. A large magnetodielectric effect was observed in HoMnO3 at low temperature where the dielectric constant can be tuned by an external magnetic field resulting in a decrease of up to 8% at 7 T. By comparing data for YMnO3 and HoMnO3 the contributions to the coupling between the dielectric response and Mn and Ho magnetic moments are separated. C1 Univ Houston, Dept Phys, Houston, TX 77204 USA. Univ Houston, TCSUH, Houston, TX 77204 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Hong Kong Univ Sci & Technol, Hong Kong, Hong Kong, Peoples R China. RP Lorenz, B (reprint author), Univ Houston, Dept Phys, Houston, TX 77204 USA. NR 17 TC 150 Z9 151 U1 6 U2 42 PU AMERICAN 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 DEC PY 2004 VL 70 IS 21 AR 212412 DI 10.1103/PhysRevB.70.212412 PG 4 WC Physics, Condensed Matter SC Physics GA 884UF UT WOS:000226111400018 ER PT J AU Luo, WD Duan, WH Louie, SG Cohen, ML AF Luo, WD Duan, WH Louie, SG Cohen, ML TI Structural and electronic properties of n-doped and p-doped SrTiO3 SO PHYSICAL REVIEW B LA English DT Article ID SUPERCONDUCTING TRANSITION; OXYGEN VACANCY; TOTAL-ENERGY; AB-INITIO; PSEUDOPOTENTIALS; SEMICONDUCTORS; GAS AB We study the effects of n-doping and p-doping on the structural and electronic properties of SrTiO3 using the ab initio pseudopotential density functional theory. Two types of electron doping and one type of hole doping are considered: introducing O vacancies, substituting V for Ti, and substituting Sc for Ti. We find that all dopings lead to small structural distortions. The effect of O vacancies on the structure is the largest. Electron doping leads to significant changes of the conduction band. For the O vacancy case, there is a Ti 3d-e(g) type defect state near the lower conduction band; while in the case of substitutional V, some parts of the lowest conduction bands become very flat. Hole doping yields a larger density of states at the Fermi level than electron doping. Our results indicate that the rigid band model with a Fermi level shift upwards or downwards is not applicable to describe the effects of oxygen vacancy induced electron doping on the electronic properties; however, this may be a reasonable approximation for the case of hole doping. Finally, we estimate the electron-phonon coupling parameters and discuss the implications of this study on superconductivity in the SrTiO3 system. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China. RP Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. RI Duan, Wenhui /H-4992-2011; Luo, Weidong/A-8418-2009 OI Duan, Wenhui /0000-0001-9685-2547; Luo, Weidong/0000-0003-3829-1547 NR 36 TC 87 Z9 89 U1 7 U2 74 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 DEC PY 2004 VL 70 IS 21 AR 214109 DI 10.1103/PhysRevB.70.214109 PG 8 WC Physics, Condensed Matter SC Physics GA 884UF UT WOS:000226111400042 ER PT J AU Martin, I Kaneshita, E Bishop, AR McQueeney, RJ Yu, ZG AF Martin, I Kaneshita, E Bishop, AR McQueeney, RJ Yu, ZG TI Vibrational edge modes in intrinsically heterogeneous doped transition metal oxides SO PHYSICAL REVIEW B LA English DT Article ID PEIERLS-HUBBARD MODEL; NEUTRON-SCATTERING; CHARGE LOCALIZATION; DENSITY-WAVE; STATES; SUPERCONDUCTIVITY; SPINS; HOLES; FLUCTUATIONS; LA2NIO4.125 AB By applying an unrestricted Hartree-Fock and a random phase approximation to a multiband Peierls-Hubbard Hamiltonian, we study the phonon mode structure in models of transition metal oxides in the presence of intrinsic nanoscale inhomogeneities induced by hole doping. We identify low-frequency local vibrational modes pinned to the sharp interfaces between regions of distinct electronic structure (doped and undoped) and separated in frequency from the band of extended phonons. A characteristic of these "edge" modes is that their energy is essentially insensitive to the doping level. We discuss the experimental manifestations of these modes in inelastic neutron scattering and also in spin and charge excitation spectra. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Ames Lab, Ames, IA 50011 USA. SRI Int, Menlo Pk, CA 94025 USA. RP Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Yu, Z/B-5547-2009; McQueeney, Robert/A-2864-2016; OI McQueeney, Robert/0000-0003-0718-5602; , Zhi-Gang/0000-0002-1376-9025 NR 44 TC 9 Z9 9 U1 0 U2 2 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 DEC PY 2004 VL 70 IS 22 AR 224514 DI 10.1103/PhysRevB.70.224514 PG 5 WC Physics, Condensed Matter SC Physics GA 884UJ UT WOS:000226111800095 ER PT J AU Matveev, KA AF Matveev, KA TI Conductance of a quantum wire at low electron density SO PHYSICAL REVIEW B LA English DT Article ID ONE-DIMENSIONAL CONSTRICTION; POINT CONTACTS; QUANTIZED CONDUCTANCE; SPIN POLARIZATION; HUBBARD-MODEL; BETHE-ANSATZ; GAS; TRANSPORT; DOTS; EDGE AB We study the transport of electrons through a long quantum wire connecting two bulk leads. As the electron density in the wire is lowered, the Coulomb interactions lead to short-range crystalline ordering of electrons. In this Wigner crystal state the spins of electrons form an antiferromagnetic Heisenberg spin chain with exponentially small exchange coupling J. Inhomogeneity of the electron density due to the coupling of the wire to the leads results in violation of spin-charge separation in the device. As a result the spins affect the conductance of the wire. At zero temperature the low-energy spin excitations propagate freely through the wire, and its conductance remains 2e(2)/h. Since the energy of the elementary excitations in the spin chain (spinons) cannot exceed piJ/2, the conductance of the wire acquires an exponentially small negative correction delta Gproportional to-exp(-piJ/2T) at low temperatures Tmuch less thanJ. At higher temperatures, Tmuch greater thanJ, most of the spin excitations in the leads are reflected by the wire, and the conductance levels off at a new universal value e(2)/h. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Duke Univ, Dept Phys, Durham, NC 27708 USA. RP Matveev, KA (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 62 TC 97 Z9 97 U1 2 U2 4 PU AMERICAN 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 DEC PY 2004 VL 70 IS 24 AR 245319 DI 10.1103/PhysRevB.70.245319 PG 15 WC Physics, Condensed Matter SC Physics GA 884UN UT WOS:000226112300077 ER PT J AU Meulenberg, RW Jennings, T Strouse, GF AF Meulenberg, RW Jennings, T Strouse, GF TI Compressive and tensile stress in colloidal CdSe semiconductor quantum dots SO PHYSICAL REVIEW B LA English DT Article ID HIGH-PRESSURE; RAMAN-SCATTERING; NANOCRYSTALS; CLUSTERS; FILMS; SIZE AB Compressive and tensile stress in colloidal CdSe quantum dots (QDs) is examined using resonance Raman spectroscopy. We find that the dispersion of the longitudinal optical phonon mode with size does not follow theoretical calculations based on phonon confinement models. To account for these deviations, the presence of compressive or tensile stress in the QDs is proposed. The influence of surface reconstruction on QD behavior is evidenced by differences in hexadecylamine (HDA) and trioctylphospine oxide (TOP/TOPO) passivation. We find that CdSe QDs passivated by HDA exhibit compressive stress, while CdSe QDs passivated by TOP/TOPO exhibit tensile stress. Evidence is provided that the CdSe-HDA QD stress is directly to a passivant driven surface reconstruction effect. C1 Lawrence Livermore Natl Lab, Div Mat Sci, Livermore, CA 94550 USA. Florida State Univ, Dept Chem, Tallahassee, FL 32316 USA. RP Meulenberg, RW (reprint author), Lawrence Livermore Natl Lab, Div Mat Sci, Livermore, CA 94550 USA. EM meulenberg1@llnl.gov; strouse@chem.fsu.edu OI Meulenberg, Robert/0000-0003-2696-8792 NR 21 TC 61 Z9 61 U1 0 U2 9 PU AMERICAN 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 DEC PY 2004 VL 70 IS 23 AR 235311 DI 10.1103/PhysRevB.70.235311 PG 5 WC Physics, Condensed Matter SC Physics GA 884UL UT WOS:000226112100090 ER PT J AU Mittal, R Chaplot, SL Schober, H Kolesnikov, AI Loong, CK Lind, C Wilkinson, AP AF Mittal, R Chaplot, SL Schober, H Kolesnikov, AI Loong, CK Lind, C Wilkinson, AP TI Negative thermal expansion in cubic ZrMo2O8: Inelastic neutron scattering and lattice dynamical studies SO PHYSICAL REVIEW B LA English DT Article ID DENSITY-OF-STATES; HIGH-PRESSURE BEHAVIOR; PHASE-TRANSFORMATION; GRUNEISEN-PARAMETER; OXYGEN MIGRATION; ZRW2O8; TRANSITIONS; HFW2O8 AB Disordered cubic ZrMo2O8(Pa(3) over bar, Z=4) is known to display isotropic negative thermal expansion (NTE) below 600 K. We report high-pressure inelastic neutron scattering experiments up to 2.5 kbar in this material using the IN6 spectrometer at Institut Laue-Langevin. The observed phonon softening of about 0.1-0.3 meV for phonons below 8 meV is able to account for the NTE below 100 K. The phonon spectrum in the entire energy range up to 150 meV has been measured using the HRMECS spectrometer at Argonne National Laboratory. The ordered phase (space group P2(1)3) of cubic ZrMo2O8 has not yet been synthesized. However, we have calculated the phonon spectrum and thermal expansion in this phase for comparison with the known ordered phase of cubic ZrW2O8. C1 Bhabha Atom Res Ctr, Div Solid State Phys, Bombay 400085, Maharashtra, India. Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France. Argonne Natl Lab, Div Intense Pulsed Neutron Source, Argonne, IL 60439 USA. Univ Toledo, Dept Chem, Toledo, OH 43606 USA. Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA. RP Mittal, R (reprint author), Bhabha Atom Res Ctr, Div Solid State Phys, Bombay 400085, Maharashtra, India. RI Wilkinson, Angus/C-3408-2008; Lind, Cora/K-3595-2013; Kolesnikov, Alexander/I-9015-2012 OI Wilkinson, Angus/0000-0003-2904-400X; Lind, Cora/0000-0002-8138-3562; Kolesnikov, Alexander/0000-0003-1940-4649 NR 38 TC 31 Z9 31 U1 1 U2 11 PU AMERICAN 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 DEC PY 2004 VL 70 IS 21 AR 214303 DI 10.1103/PhysRevB.70.214303 PG 6 WC Physics, Condensed Matter SC Physics GA 884UF UT WOS:000226111400058 ER PT J AU Napolitano, RE Liu, S AF Napolitano, RE Liu, S TI Three-dimensional crystal-melt Wulff-shape and interfacial stiffness in the Al-Sn binary system SO PHYSICAL REVIEW B LA English DT Article ID SURFACE-TENSION-ANISOTROPY; DENDRITIC GROWTH; FREE-ENERGY; DIFFUSIONAL GROWTH; SOLVABILITY THEORY; PHASE-FIELD; SOLIDIFICATION; MORPHOLOGY; PARTICLES; HARMONICS AB The quantitative determination of the three-dimensional Wulff shape for a metallic crystal-melt system is reported here. The anisotropy of crystal-melt interfacial free energy is experimentally measured for the Al-Sn binary system at temperatures of 300 and 500degreesC. Equilibrium shapes of liquid droplets entrained within the crystalline phase are measured experimentally on sequential two-dimensional sections, and the three-dimensional Wulff plot is reconstructed. For this system, it is found that a single-parameter description of anisotropy is not sufficient, and the anisotropy is reported using the leading terms of the relevant cubic harmonics. Accordingly, the anisotropy coefficients are determined to be epsilon(1)=(1.81+/-0.36)x10(-2) and epsilon(2)=(-1.12+/-0.13)x10(-2). In addition, the corresponding normal stiffness components as well as a generalized stiffness are quantified and compared with available predictions from atomistic simulations. C1 Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA. US DOE, Mat & Engn Phys Program, Ames Lab, Ames, IA 50011 USA. RP Napolitano, RE (reprint author), Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA. NR 42 TC 34 Z9 34 U1 0 U2 14 PU AMERICAN 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 DEC PY 2004 VL 70 IS 21 AR 214103 DI 10.1103/PhysRevB.70.214103 PG 11 WC Physics, Condensed Matter SC Physics GA 884UF UT WOS:000226111400036 ER PT J AU Ono, S Ando, Y Balakirev, FF Betts, JB Boebinger, GS AF Ono, S Ando, Y Balakirev, FF Betts, JB Boebinger, GS TI Examination of the c-axis resistivity of Bi2Sr2-xLaxCuO6+delta in magnetic fields up to 58 T SO PHYSICAL REVIEW B LA English DT Article ID NORMAL-STATE; PSEUDOGAP; MAGNETORESISTANCE; LA2-XSRXCUO4; CROSSOVER AB We measure the magnetic-field dependence of the c-axis resistivity, rho(c)(H), in a series of Bi2Sr2-xLaxCuO6+delta (BSLCO) single crystals for a wide range of doping using pulsed magnetic fields up to 58 T. The behavior of rho(c)(H) is examined in light of the recent determination of the upper critical field H-c2 for this material using Nernst effect measurements. We find that the peak in rho(c)(H) shows up at a field H-p that is much lower than H-c2 and there is no discernable feature in rho(c)(H) at H-c2. Intriguingly, H-p shows a doping dependence similar to that of T-c, and there is an approximate relation k(B)T(c)similar or equal to1/2gmu(B)H(p). Moreover, we show that the data for the lowest-T-c sample can be used to estimate the pseudogap closing field H-pg, but the method to estimate H-pg proposed by Shibauchi [Phys. Rev. Lett. 86, 5763 (2001)] must be modified to apply to the BSLCO system. C1 Cent Res Inst Elect Power Ind, Tokyo 2018511, Japan. Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA. RP Ono, S (reprint author), Cent Res Inst Elect Power Ind, Tokyo 2018511, Japan. RI Ando, Yoichi/B-8163-2013 OI Ando, Yoichi/0000-0002-3553-3355 NR 23 TC 10 Z9 10 U1 0 U2 1 PU AMERICAN 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 DEC PY 2004 VL 70 IS 22 AR 224521 DI 10.1103/PhysRevB.70.224521 PG 5 WC Physics, Condensed Matter SC Physics GA 884UJ UT WOS:000226111800102 ER PT J AU Petracic, O Glatz, A Kleemann, W AF Petracic, O Glatz, A Kleemann, W TI Models for the magnetic ac susceptibility of granular superferromagnetic CoFe/Al2O3 SO PHYSICAL REVIEW B LA English DT Article ID PARTICLE SYSTEM; NANOPARTICLE ASSEMBLIES; THERMAL FLUCTUATIONS; 2-DIMENSIONAL ARRAYS; REVERSAL DYNAMICS; CREEP; FILMS; CO80FE20/AL2O3; FERROMAGNETS; TRANSITION AB The magnetization and magnetic ac susceptibility, chi=chi(')-ichi('), of superferromagnetic systems are studied by numerical simulations. The Cole-Cole plot, chi(') versus chi('), is used as a tool for classifying magnetic systems by their dynamical behavior. The simulations of the magnetization hysteresis and the ac susceptibility are performed with two approaches for a driven domain wall in random media. The studies are motivated by recent experimental results on the interacting nanoparticle system Co80Fe20/Al2O3 showing superferromagnetic behavior. Its Cole-Cole plot indicates domain-wall motion dynamics similarly to a disordered ferromagnet, including pinning and sliding motion. With our models, we can successfully reproduce the features found in the experimental Cole-Cole plots. C1 Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA. Univ Duisburg Essen, D-47048 Duisburg, Germany. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany. RP Petracic, O (reprint author), Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA. EM opetr@kleemann.uni-duisburg.de; ang@thp.uni-koeln.de OI Kleemann, Wolfgang/0000-0002-1167-5922; Petracic, Oleg/0000-0002-5138-9832 NR 60 TC 33 Z9 33 U1 1 U2 7 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 DEC PY 2004 VL 70 IS 21 AR 214432 DI 10.1103/PhysRevB.70.214432 PG 7 WC Physics, Condensed Matter SC Physics GA 884UF UT WOS:000226111400094 ER PT J AU Pohl, K Plummer, EW Hoffmann, SV Hofmann, P AF Pohl, K Plummer, EW Hoffmann, SV Hofmann, P TI Phase diagram of hydrogen on Be(0001) from reconstruction-induced surface core-level shifts SO PHYSICAL REVIEW B LA English DT Article ID SPECTRUM; PHYSICS AB The surface core-level shifts (SCLS) on the (0001) surface of beryllium were used to study the phase diagram of the hydrogen-induced reconstructions on this surface. Two different top-layer reconstruction phases are formed upon atomic hydrogen adsorption below and above room temperature, respectively. We are able to assign a characteristic core-level spectrum to an individual reconstruction phase and trace its presence at various hydrogen coverages and sample temperatures. This technique makes it possible to survey the low-coverage regions that are lacking long-range ordering. Adsorption of atomic hydrogen in a temperature range of 100 to 270 K induces a (root3xroot3)R30degrees H-Be(0001) chemisorption structure, in which 1/3 of the Be top-layer atoms are removed to form a honeycomb structure of Be vacancies. Upon adsorption above 300 K a (1x3) superstructure forms, which has been proposed to exhibit a missing-row reconstruction of the Be top layer. Our hydrogen-induced SCLS measurements reveal that beryllium vacancies are forming already at small H coverages of 0.2 monolayers. C1 Univ New Hampshire, Dept Phys, Durham, NH 03824 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. Aarhus Univ, Inst Storage Ring Facil, DK-8000 Aarhus C, Denmark. RP Pohl, K (reprint author), Univ New Hampshire, Dept Phys, Durham, NH 03824 USA. EM karsten.pohl@unh.edu RI Hofmann, Philip/B-5938-2008 OI Hofmann, Philip/0000-0002-7367-5821 NR 14 TC 4 Z9 4 U1 0 U2 3 PU AMERICAN 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 DEC PY 2004 VL 70 IS 23 AR 235424 DI 10.1103/PhysRevB.70.235424 PG 6 WC Physics, Condensed Matter SC Physics GA 884UL UT WOS:000226112100149 ER PT J AU Schneider, HC Chow, WW Koch, SW AF Schneider, HC Chow, WW Koch, SW TI Excitation-induced dephasing in semiconductor quantum dots SO PHYSICAL REVIEW B LA English DT Article ID ROOM-TEMPERATURE; RELAXATION; DYNAMICS; GAAS AB A quantum kinetic theory is used to compute excitation induced dephasing in semiconductor quantum dots due to the Coulomb interaction with a continuum of states, such as a quantum well or a wetting layer. It is shown that a frequency dependent broadening together with nonlinear resonance shifts are needed for a microscopic explanation of the excitation induced dephasing in such a system, and that excitation induced dephasing for a quantum-dot excitonic resonance is different from quantum-well and bulk excitons. C1 Kaiserslautern Univ Technol, Dept Phys, D-67653 Kaiserslautern, Germany. Sandia Natl Labs, Semicond Mat & Device Sci Dept, Albuquerque, NM 87185 USA. Univ Marburg, Dept Phys, D-35037 Marburg, Germany. RP Schneider, HC (reprint author), Kaiserslautern Univ Technol, Dept Phys, POB 3049, D-67653 Kaiserslautern, Germany. RI Schneider, Hans Christian/B-9450-2009 OI Schneider, Hans Christian/0000-0001-7656-4919 NR 21 TC 39 Z9 39 U1 1 U2 9 PU AMERICAN 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 DEC PY 2004 VL 70 IS 23 AR 235308 DI 10.1103/PhysRevB.70.235308 PG 4 WC Physics, Condensed Matter SC Physics GA 884UL UT WOS:000226112100087 ER PT J AU Sergienko, IA Curnoe, SH AF Sergienko, IA Curnoe, SH TI Order parameter in superconductors with nondegenerate bands SO PHYSICAL REVIEW B LA English DT Article ID PYROCHLORE OXIDE; SYMMETRY; CD2RE2O7; SESQUICARBIDE; CEPT3SI; SYSTEM AB In noncentrosymmetric metals, the spin degeneracy of the electronic bands is lifted by spin-orbit coupling. We consider general symmetry properties of the pairing function Delta(k) in noncentrosymmetric superconductors with spin-orbit coupling (NSC), including CePt3Si, UIr, and Cd2Re2O7. We find that Delta(k)=chi(k)t(k), where chi(k) is an even function which transforms according to the irreducible representations of the crystallographic point group and t(k) is a model-dependent phase factor. We consider tunneling between a NSC and a conventional superconductor. It is found that, in terms of thermodynamical properties as well as the Josephson effect, the state of NSC resembles a singlet superconducting state with gap function chi(k). C1 Mem Univ Newfoundland, Dept Phys & Phys Oceanog, St John, NF A1B 3X7, Canada. RP Sergienko, IA (reprint author), Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. EM sergienko@ornl.gov NR 42 TC 69 Z9 69 U1 0 U2 2 PU AMERICAN 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 DEC PY 2004 VL 70 IS 21 AR 214510 DI 10.1103/PhysRevB.70.214510 PG 8 WC Physics, Condensed Matter SC Physics GA 884UF UT WOS:000226111400111 ER PT J AU Shpyrko, OG Grigoriev, AY Steimer, C Pershan, PS Lin, BH Meron, M Graber, T Gerbhardt, J Ocko, B Deutsch, M AF Shpyrko, OG Grigoriev, AY Steimer, C Pershan, PS Lin, BH Meron, M Graber, T Gerbhardt, J Ocko, B Deutsch, M TI Anomalous layering at the liquid Sn surface SO PHYSICAL REVIEW B LA English DT Article ID X-RAY REFLECTIVITY; CAPILLARY WAVES; GALLIUM; GA AB X-ray reflectivity measurements on the free surface of liquid Sn are presented. They exhibit the high-angle peak, indicative of surface-induced layering, also found for other pure liquid metals (Hg, Ga, and In). However, a low-angle shoulder, not hitherto observed for any pure liquid metal, is also found, indicating the presence of a high-density surface layer. Fluorescence and resonant reflectivity measurements rule out the assignment of this layer to surface segregation of impurities. The reflectivity is modeled well by a 10% contraction of the spacing between the first and second atomic surface layers, relative to that of subsequent layers. Possible reasons for this are discussed. C1 Harvard Univ, Dept Phys, Cambridge, MA 02138 USA. Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA. Univ Chicago, Ctr Adv Radiat Sources, Chicago, IL 60637 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel. RP Shpyrko, OG (reprint author), Harvard Univ, Dept Phys, Cambridge, MA 02138 USA. RI Shpyrko, Oleg/J-3970-2012 NR 24 TC 50 Z9 51 U1 0 U2 7 PU AMERICAN 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 DEC PY 2004 VL 70 IS 22 AR 224206 DI 10.1103/PhysRevB.70.224206 PG 7 WC Physics, Condensed Matter SC Physics GA 884UJ UT WOS:000226111800032 ER PT J AU Smith, S Zhang, Y Mascarenhas, A Hanna, M AF Smith, S Zhang, Y Mascarenhas, A Hanna, M TI Effects of localization on the excitonic linewidth in partially ordered GaxIn1-xP alloys SO PHYSICAL REVIEW B LA English DT Article ID SEMICONDUCTOR ALLOYS; QUANTUM-WELLS; PHOTOLUMINESCENCE; SPECTRA; GAINP2 AB Spontaneous ordering in the ternary alloy GaxIn1-xP naturally leads to a reduction in alloy scattering and thus a reduction in the excitonic linewidth with increasing order parameter eta. Concomitantly, the effect of localized states associated with various defects tends to increase the exciton linewidth, and it was observed that for etagreater than or equal to0.45, the linewidth actually increases with order parameter [Phys. Rev. B 61, 9910 (2000)]. This was attributed to the increase in native defects which occurs for higher order parameters due to limitations in current growth technology. We show, using spatially resolved PL imaging with confocal and near-field microscopy, that this trend is reproduced in all ordered- GaxIn1-xP samples, within the micro-ensemble formed by the collection of all spectra in a spatially and spectrally resolved PL image, directly imaging the effect of exciton localization. This reversed trend is a result of the interplay between the effects of localization and spontaneous ordering, and the spatial averaging which occurs when examining areas many times larger than the exciton Bohr radius. Agreement with the trend observed in macro-PL is obtained via micro-ensemble averaging of each data set, and by examination of the spatial correlation of exciton linewidths. The implications of these results on the origin of the exciton linewidth in ordered alloys and the effect of ordering on the spatial distribution of exciton linewidths are discussed. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Smith, S (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. EM steven_smith@nrel.gov NR 26 TC 0 Z9 0 U1 0 U2 3 PU AMERICAN 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 DEC PY 2004 VL 70 IS 23 AR 235301 DI 10.1103/PhysRevB.70.235301 PG 6 WC Physics, Condensed Matter SC Physics GA 884UL UT WOS:000226112100080 ER PT J AU Sreekala, S Ahluwalia, R Ananthakrishna, G AF Sreekala, S Ahluwalia, R Ananthakrishna, G TI Precursors and power-law statistics of acoustic emission and shape memory effect in martensites SO PHYSICAL REVIEW B LA English DT Article ID SELF-ORGANIZED CRITICALITY; PHASE FIELD MODEL; CU-ZN-AL; FE-PD ALLOYS; TWEED MICROSTRUCTURES; ISING-MODEL; NI-AL; TRANSFORMATIONS; TRANSITION; AVALANCHES AB We report a detailed numerical investigation of a recently introduced two-dimensional model for square-to-rectangle martensitic transformation that explains several unusual features of the martensitic transformation. This model includes inertial effects, dissipation, long-range interaction between the transformed domains and an inhomogeneous stress field to describe the effect of lattice defects which serves as nucleation centers. Both single-site nucleation and multi-site nucleation has been studied for single quench situation and thermal cycling. The final stage morphologies of single-site nucleation and multi-site nucleation bear considerable similarity suggesting that the initial distribution of the defects is not important. Thermal cycling using continuous cooling and heating simulations show the existence of hysteresis in the transformation. More importantly, the rate of energy dissipated occurs in the forms of bursts with power law statistics for their amplitudes and durations which explains the results of acoustic emission signals observed in experiments. When the system is cycled repeatedly in a restricted domain of temperatures, the dissipated bursts of energy are repetitive, a feature observed in experiments. The associated morphology shows a complete reversal of the martensite domains thus throwing light on the mechanism underlying the shape memory effect. The model also exhibits tweed-like patterns. C1 Indian Inst Sci, Ctr Mat Res, Bangalore 560012, Karnataka, India. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Indian Inst Sci, Ctr Condensed Matter Theory, Bangalore 560012, Karnataka, India. RP Sreekala, S (reprint author), Indian Inst Sci, Ctr Mat Res, Bangalore 560012, Karnataka, India. EM garani@mrc.iisc.ernet.in NR 56 TC 12 Z9 12 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 DEC PY 2004 VL 70 IS 22 AR 224105 DI 10.1103/PhysRevB.70.224105 PG 13 WC Physics, Condensed Matter SC Physics GA 884UJ UT WOS:000226111800022 ER PT J AU Tretiak, S Piryatinski, A Saxena, A Martin, RL Bishop, AR AF Tretiak, S Piryatinski, A Saxena, A Martin, RL Bishop, AR TI On the existence of photoexcited breathers in conducting polymers SO PHYSICAL REVIEW B LA English DT Article ID CONJUGATED POLYMERS; DYNAMICS; MOLECULES; MATRIX AB Formation and decay mechanisms of photoinduced nonlinear vibronic excitations ("breathers") in several conjugated polymers are studied using a quantum-chemical excited state molecular dynamics approach. We identify specific coupled vibrational modes responsible for breather excitations and investigate their dependence on chain length. In addition to intermolecular relaxation mechanisms, our calculations show that intramolecular vibrational energy equilibration results in a decay of breathers on a timescale of hundreds of femtoseconds. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM serg@cnls.lanl.gov RI Piryatinski, Andrei/B-5543-2009; Tretiak, Sergei/B-5556-2009 OI Tretiak, Sergei/0000-0001-5547-3647 NR 18 TC 11 Z9 11 U1 0 U2 1 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 DEC PY 2004 VL 70 IS 23 AR 233203 DI 10.1103/PhysRevB.70.233203 PG 4 WC Physics, Condensed Matter SC Physics GA 884UL UT WOS:000226112100009 ER PT J AU Tsetseris, L Pantelides, ST AF Tsetseris, L Pantelides, ST TI Migration, incorporation, and passivation reactions of molecular hydrogen at the Si-SiO2 interface SO PHYSICAL REVIEW B LA English DT Article ID ELECTRON-SPIN-RESONANCE; P-B DEFECTS; SI/SIO2 INTERFACE; SILICON; DIFFUSION; DEUTERIUM; KINETICS; CENTERS; H-2; REPLACEMENT AB We use first-principles calculations to address the main steps involving molecular hydrogen at the (100) Si-SiO2 interface, with an emphasis on obtaining the relevant reaction and migration barriers. We show that during passivation in an H-2 ambient, molecular hydrogen is effectively prohibited to enter Si. Instead, it migrates along the interface, where it can passivate P-b centers. Alternatively, at elevated temperatures, it can degrade the interface by cleavage of Si-Si bonds. The calculated barriers are in agreement with experimental values, and offer a critical assessment of previous theoretical studies. C1 Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. RP Tsetseris, L (reprint author), Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. NR 28 TC 39 Z9 39 U1 1 U2 53 PU AMERICAN 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 DEC PY 2004 VL 70 IS 24 AR 245320 DI 10.1103/PhysRevB.70.245320 PG 6 WC Physics, Condensed Matter SC Physics GA 884UN UT WOS:000226112300078 ER PT J AU van Gastel, R Bartelt, NC Feibelman, PJ Leonard, F Kellogg, GL AF van Gastel, R Bartelt, NC Feibelman, PJ Leonard, F Kellogg, GL TI Relationship between domain-boundary free energy and the temperature dependence of stress-domain patterns of Pb on Cu(111) SO PHYSICAL REVIEW B LA English DT Article ID ABINITIO MOLECULAR-DYNAMICS; WAVE BASIS-SET; ULTRASOFT PSEUDOPOTENTIALS; ELECTRON MICROSCOPY; SURFACES; STEP; METALS; GROWTH; TRANSITION; DEPOSITION AB Pb deposition on Cu(111) causes the surface to self-assemble into periodically arranged domains of a Pb-rich phase and a Pb-poor phase. Using low-energy electron microscopy (LEEM) we provide evidence that the observed temperature-dependent periodicity of these self-assembled domain patterns is the result of changing domain-boundary free energy. We determine the free energy of boundaries at different temperatures from a capillary wave analysis of the thermal fluctuations of the boundaries and find that it varies from 22 meV/nm at 600 K to 8 meV/nm at 650 K. Combining this result with previous measurements of the surface stress difference between the two phases we find that the theory of surface-stress-induced domain formation can quantitatively account for the observed periodicities. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Univ Twente, MESA Inst, NL-7500 AE Enschede, Netherlands. Sandia Natl Labs, Livermore, CA 94551 USA. RP Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. RI Bartelt, Norman/G-2927-2012 NR 40 TC 14 Z9 14 U1 0 U2 2 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 DEC PY 2004 VL 70 IS 24 AR 245413 DI 10.1103/PhysRevB.70.245413 PG 6 WC Physics, Condensed Matter SC Physics GA 884UN UT WOS:000226112300096 ER PT J AU Wang, SY Wang, CZ Chuang, FC Morris, JR Ho, KM AF Wang, SY Wang, CZ Chuang, FC Morris, JR Ho, KM TI Ab initio molecular dynamics simulation of liquid AlxGe1-x alloys SO PHYSICAL REVIEW B LA English DT Article ID TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; AL-GE ALLOYS; ELECTRONIC-STRUCTURE; METALS; GERMANIUM AB First-principles molecular dynamics simulations are carried out to study the structural, dynamical, and electronic properties of liquid AlxGe1-x with 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0 of aluminum concentration. The concentration dependence of static structure factors, pair correlation functions, diffusion constants, and electronic density-of-states at temperature of 1250 K are investigated. The structural properties obtained from the simulations are in good agreement with neutron scattering experimental results. C1 Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. Fudan Univ, Dept Opt Sci & Engn, State Key Lab Adv Photon Mat & Devices, Shanghai 200433, Peoples R China. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Wang, SY (reprint author), Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA. RI Wang, Songyou/H-4529-2011; Chuang, FengChuan/H-7166-2013; Morris, J/I-4452-2012 OI Wang, Songyou/0000-0002-4249-3427; Chuang, FengChuan/0000-0003-0351-4253; Morris, J/0000-0002-8464-9047 NR 28 TC 0 Z9 0 U1 0 U2 8 PU AMERICAN 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 DEC PY 2004 VL 70 IS 22 AR 224205 DI 10.1103/PhysRevB.70.224205 PG 7 WC Physics, Condensed Matter SC Physics GA 884UJ UT WOS:000226111800031 ER PT J AU Adams, J Aggarwal, MM Ahammed, Z Amonett, J Anderson, BD Arkhipkin, D Averichev, GS Bai, Y Balewski, J Barannikova, O Barnby, LS Baudot, J Bekele, S Belaga, VV Bellwied, R Berger, J Bezverkhny, BI Bharadwaj, S Bhasin, A Bhati, AK Bhatia, VS Bichsel, H Billmeier, A Bland, LC Blyth, CO Bonner, BE Botje, M Boucham, A Brandin, AV Bravar, A Bystersky, M Cadman, RV Cai, XZ Caines, H Sanchez, MCD Castillo, J Cebra, D Chajecki, Z Chaloupka, P Chattopdhyay, S Chen, HF Chen, Y Cheng, J Cherney, M Chikanian, A Christie, W Coffin, JP Cormier, TM Cramer, JG Crawford, HJ Das, D Das, S de Moura, MM Derevschikov, AA Didenko, L Dietel, T Dogra, SM Dong, WJ Dong, X Draper, JE Du, F Dubey, AK Dunin, VB Dunlop, JC Mazumdar, MRD Eckardt, V Edwards, WR Efimov, LG Emelianov, V Engelage, J Eppley, G Erazmus, B Estienne, M Fachini, P Faivre, J Fatemi, R Fedorisin, J Filimonov, K Filip, P Finch, E Fine, V Fisyak, Y Fomenko, K Fu, J Gagliardi, CA Gaillard, L Gans, J Ganti, MS Gaudichet, L Geurts, F Ghazikhanian, V Ghosh, P Gonzalez, JE Grachov, O Grebenyuk, O Grosnick, D Guertin, SM Guo, Y Gupta, A Gutierrez, TD Hallman, TJ Hamed, A Hardtke, D Harris, JW Heinz, M Henry, TW Hepplemann, S Hippolyte, B Hirsch, A Hjort, E Hoffmann, GW Huang, HZ Huang, SL Hughes, EW Humanic, TJ Igo, G Ishihara, A Jacobs, P Jacobs, WW Janik, M Jiang, H Jones, PG Judd, EG Kabana, S Kang, K Kaplan, M Keane, D Khodyrev, VY Kiryluk, J Kisiel, A Kislov, EM Klay, J Klein, SR Koetke, DD Kollegger, T Kopytine, M Kotchenda, L Kramer, M Kravtsov, P Kravtsov, VI Krueger, K Kuhn, C Kulikov, AI Kumar, A Kutuev, RK Kuznetsov, AA Lamont, MAC Landgraf, JM Lange, S Laue, F Lauret, J Lebedev, A Lednicky, R Lehocka, S LeVine, MJ Li, C Li, Q Li, Y Lin, G Lindenbaum, SJ Lisa, MA Liu, F Liu, L Liu, QJ Liu, Z Ljubicic, T Llope, WJ Long, H Longacre, RS Lopez-Noriega, M Love, WA Lu, Y Ludlam, T Lynn, D Ma, GL Ma, JG Ma, YG Magestro, D Mahajan, S Mahapatra, DP Majka, R Mangotra, LK Manweiler, R Margetis, S Markert, C Martin, L Marx, JN Matis, HS Matulenko, YA McClain, CJ McShane, TS Meissner, F Melnick, Y Meschanin, A Miller, ML Minaev, NG Mironov, C Mischke, A Mishra, DK Mitchell, J Mohanty, B Molnar, L Moore, CF Mora-Corral, MJ Morozov, DA Munhoz, MG Nandi, BK Nayak, SK Nayak, TK Nelson, JM Netrakanti, PK Nikitin, VA Nogach, LV Nurushev, SB Odyniec, G Ogawa, A Okorokov, V Oldenburg, M Olson, D Pal, SK Panebratsev, Y Panitkin, SY Pavlinov, AI Pawlak, T Peitzmann, T Perevoztchikov, V Perkins, C Peryt, W Petrov, VA Phatak, SC Picha, R Planinic, M Pluta, J Porile, N Porter, J Poskanzer, AM Potekhin, M Potrebenikova, E Potukuchi, BVKS Prindle, D Pruneau, C Putschke, J Rakness, G Raniwala, R Raniwala, S Ravel, O Ray, RL Razin, SV Reichhold, D Reid, JG Renault, G Retiere, F Ridiger, A Ritter, HG Roberts, JB Rogachevskiy, OV Romero, JL Rose, A Roy, C Ruan, L Sahoo, R Sakrejda, I Salur, S Sandweiss, J Sarsour, M Savin, I Sazhin, PS Schambach, J Scharenberg, RP Schmitz, N Schweda, K Seger, J Seyboth, P Shahaliev, E Shao, M Shao, W Sharma, M Shen, WQ Shestermanov, KE Shimanskiy, SS Sichtermann, E Simon, F Singaraju, RN Skoro, G Smirnov, N Snellings, R Sood, G Sorensen, P Sowinski, J Speltz, J Spinka, HM Srivastava, B Stadnik, A Stanislaus, TDS Stock, R Stolpovsky, A Strikhanov, M Stringfellow, B Suaide, AAP Sugarbaker, E Suire, C Sumbera, M Surrow, B Symons, TJM de Toledo, AS Szarwas, P Tai, A Takahashi, J Tang, AH Tarnowsky, T Thein, D Thomas, JH Timoshenko, S Tokarev, M Trainor, TA Trentalange, S Tribble, RE Tsai, OD Ulery, J Ullrich, T Underwood, DG Urkinbaev, A Van Buren, G van Leeuwen, M Vander Molen, AM Varma, R Vasilevski, IM Vasiliev, AN Vernet, R Vigdor, SE Viyogi, YP Vokal, S Voloshin, SA Vznuzdaev, M Waggoner, WT Wang, F Wang, G Wang, G Wang, XL Wang, Y Wang, Y Wang, ZM Ward, H Watson, JW Webb, JC Wells, R Westfall, GD Wetzler, A Whitten, C Wieman, H Wissink, SW Witt, R Wood, J Wu, J Xu, N Xu, Z Xu, ZZ Yamamoto, E Yepes, P Yurevich, VI Zanevsky, YV Zhang, H Zhang, WM Zhang, ZP Zoulkarneev, R Zoulkarneeva, Y Zubarev, AN AF Adams, J Aggarwal, MM Ahammed, Z Amonett, J Anderson, BD Arkhipkin, D Averichev, GS Bai, Y Balewski, J Barannikova, O Barnby, LS Baudot, J Bekele, S Belaga, VV Bellwied, R Berger, J Bezverkhny, BI Bharadwaj, S Bhasin, A Bhati, AK Bhatia, VS Bichsel, H Billmeier, A Bland, LC Blyth, CO Bonner, BE Botje, M Boucham, A Brandin, AV Bravar, A Bystersky, M Cadman, RV Cai, XZ Caines, H Sanchez, MCD Castillo, J Cebra, D Chajecki, Z Chaloupka, P Chattopdhyay, S Chen, HF Chen, Y Cheng, J Cherney, M Chikanian, A Christie, W Coffin, JP Cormier, TM Cramer, JG Crawford, HJ Das, D Das, S de Moura, MM Derevschikov, AA Didenko, L Dietel, T Dogra, SM Dong, WJ Dong, X Draper, JE Du, F Dubey, AK Dunin, VB Dunlop, JC Mazumdar, MRD Eckardt, V Edwards, WR Efimov, LG Emelianov, V Engelage, J Eppley, G Erazmus, B Estienne, M Fachini, P Faivre, J Fatemi, R Fedorisin, J Filimonov, K Filip, P Finch, E Fine, V Fisyak, Y Fomenko, K Fu, J Gagliardi, CA Gaillard, L Gans, J Ganti, MS Gaudichet, L Geurts, F Ghazikhanian, V Ghosh, P Gonzalez, JE Grachov, O Grebenyuk, O Grosnick, D Guertin, SM Guo, Y Gupta, A Gutierrez, TD Hallman, TJ Hamed, A Hardtke, D Harris, JW Heinz, M Henry, TW Hepplemann, S Hippolyte, B Hirsch, A Hjort, E Hoffmann, GW Huang, HZ Huang, SL Hughes, EW Humanic, TJ Igo, G Ishihara, A Jacobs, P Jacobs, WW Janik, M Jiang, H Jones, PG Judd, EG Kabana, S Kang, K Kaplan, M Keane, D Khodyrev, VY Kiryluk, J Kisiel, A Kislov, EM Klay, J Klein, SR Koetke, DD Kollegger, T Kopytine, M Kotchenda, L Kramer, M Kravtsov, P Kravtsov, VI Krueger, K Kuhn, C Kulikov, AI Kumar, A Kutuev, RK Kuznetsov, AA Lamont, MAC Landgraf, JM Lange, S Laue, F Lauret, J Lebedev, A Lednicky, R Lehocka, S LeVine, MJ Li, C Li, Q Li, Y Lin, G Lindenbaum, SJ Lisa, MA Liu, F Liu, L Liu, QJ Liu, Z Ljubicic, T Llope, WJ Long, H Longacre, RS Lopez-Noriega, M Love, WA Lu, Y Ludlam, T Lynn, D Ma, GL Ma, JG Ma, YG Magestro, D Mahajan, S Mahapatra, DP Majka, R Mangotra, LK Manweiler, R Margetis, S Markert, C Martin, L Marx, JN Matis, HS Matulenko, YA McClain, CJ McShane, TS Meissner, F Melnick, Y Meschanin, A Miller, ML Minaev, NG Mironov, C Mischke, A Mishra, DK Mitchell, J Mohanty, B Molnar, L Moore, CF Mora-Corral, MJ Morozov, DA Munhoz, MG Nandi, BK Nayak, SK Nayak, TK Nelson, JM Netrakanti, PK Nikitin, VA Nogach, LV Nurushev, SB Odyniec, G Ogawa, A Okorokov, V Oldenburg, M Olson, D Pal, SK Panebratsev, Y Panitkin, SY Pavlinov, AI Pawlak, T Peitzmann, T Perevoztchikov, V Perkins, C Peryt, W Petrov, VA Phatak, SC Picha, R Planinic, M Pluta, J Porile, N Porter, J Poskanzer, AM Potekhin, M Potrebenikova, E Potukuchi, BVKS Prindle, D Pruneau, C Putschke, J Rakness, G Raniwala, R Raniwala, S Ravel, O Ray, RL Razin, SV Reichhold, D Reid, JG Renault, G Retiere, F Ridiger, A Ritter, HG Roberts, JB Rogachevskiy, OV Romero, JL Rose, A Roy, C Ruan, L Sahoo, R Sakrejda, I Salur, S Sandweiss, J Sarsour, M Savin, I Sazhin, PS Schambach, J Scharenberg, RP Schmitz, N Schweda, K Seger, J Seyboth, P Shahaliev, E Shao, M Shao, W Sharma, M Shen, WQ Shestermanov, KE Shimanskiy, SS Sichtermann, E Simon, F Singaraju, RN Skoro, G Smirnov, N Snellings, R Sood, G Sorensen, P Sowinski, J Speltz, J Spinka, HM Srivastava, B Stadnik, A Stanislaus, TDS Stock, R Stolpovsky, A Strikhanov, M Stringfellow, B Suaide, AAP Sugarbaker, E Suire, C Sumbera, M Surrow, B Symons, TJM de Toledo, AS Szarwas, P Tai, A Takahashi, J Tang, AH Tarnowsky, T Thein, D Thomas, JH Timoshenko, S Tokarev, M Trainor, TA Trentalange, S Tribble, RE Tsai, OD Ulery, J Ullrich, T Underwood, DG Urkinbaev, A Van Buren, G van Leeuwen, M Vander Molen, AM Varma, R Vasilevski, IM Vasiliev, AN Vernet, R Vigdor, SE Viyogi, YP Vokal, S Voloshin, SA Vznuzdaev, M Waggoner, WT Wang, F Wang, G Wang, G Wang, XL Wang, Y Wang, Y Wang, ZM Ward, H Watson, JW Webb, JC Wells, R Westfall, GD Wetzler, A Whitten, C Wieman, H Wissink, SW Witt, R Wood, J Wu, J Xu, N Xu, Z Xu, ZZ Yamamoto, E Yepes, P Yurevich, VI Zanevsky, YV Zhang, H Zhang, WM Zhang, ZP Zoulkarneev, R Zoulkarneeva, Y Zubarev, AN CA STAR Collaboration TI Pseudorapidity asymmetry and centrality dependence of charged hadron spectra in d+Au collisions at root s(NN)=200 GeV SO PHYSICAL REVIEW C LA English DT Article ID TIME PROJECTION CHAMBER; NUCLEAR COLLISIONS; QCD; DISTRIBUTIONS; SATURATION; STAR AB The pseudorapidity asymmetry and centrality dependence of charged hadron spectra in d+Au collisions at roots(NN)=200 GeV are presented. The charged particle density at midrapidity, its pseudorapidity asymmetry, and centrality dependence are reasonably reproduced by a multiphase transport model, by HIJING, and by the latest calculations in a saturation model. Ratios of transverse momentum spectra between backward and forward pseudorapidity are above unity for p(T) below 5 GeV/c. The ratio of central to peripheral spectra in d+Au collisions shows enhancement at 2
alpha+alpha+n using bremsstrahlung produced by electrons from a 2-MV Van de Graaff on a gold target. The target was located within a block of beryllium surrounded by an array of He-3 proportional counters embedded in paraffin. Based on energy and intensity calibrations of the accelerator and detector using the Be-9+gamma-->Be-8+n reaction, an upper limit of 93 nb (4sigma) was placed on the cross section for neutron production between the three-body and two-body thresholds. This value is substantially below a previous experimental result using photoexcitation by Pr-142 gamma rays and also below an earlier theoretical estimate. Bremsstrahlung spectra from the gold target were also measured in a NaI(Tl) detector at electron energies from 1.7 to 2.0 MeV and angles of 0degrees to 60degrees with respect to the beam axis. An analysis of photons above the 1665-keV two-body threshold shows that bremsstrahlung due to beta rays between 1665 keV and the 2160-keV end point of the Pr-142 beta-ray spectrum could account for the photoneutron yield in the three-body region that had previously been attributed to Pr-142 gamma rays. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Alburger, DE (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. RI Wishart, James/L-6303-2013 OI Wishart, James/0000-0002-0488-7636 NR 16 TC 0 Z9 0 U1 0 U2 0 PU AMERICAN 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 DEC PY 2004 VL 70 IS 6 AR 064611 DI 10.1103/PhysRevC.70.064611 PG 5 WC Physics, Nuclear SC Physics GA 887LR UT WOS:000226308100042 ER PT J AU Back, BB Baker, MD Ballintijn, M Barton, DS Becker, B Betts, RR Bickley, AA Bindel, R Busza, W Carroll, A Decowski, MP Garcia, E Gburek, T George, N Gulbrandsen, K Gushue, S Halliwell, C Hamblen, J Harrington, AS Henderson, C Hofman, DJ Hollis, RS Holynski, R Holzman, B Iordanova, A Johnson, E Kane, JL Khan, N Kulinich, P Kuo, CM Lee, JW Lin, WT Manly, S Mignerey, AC Nouicer, R Olszewski, A Pak, R Park, IC Pernegger, H Reed, C Roland, C Roland, G Sagerer, J Sarin, P Sedykh, I Skulski, W Smith, CE Steinberg, P Stephans, GSF Sukhanov, A Tonjes, MB Trzupek, A Vale, C van Nieuwenhuizen, GJ Verdier, R Veres, GI Wolfs, FLH Wosiek, B Wozniak, K Wyslouch, B Zhang, J AF Back, BB Baker, MD Ballintijn, M Barton, DS Becker, B Betts, RR Bickley, AA Bindel, R Busza, W Carroll, A Decowski, MP Garcia, E Gburek, T George, N Gulbrandsen, K Gushue, S Halliwell, C Hamblen, J Harrington, AS Henderson, C Hofman, DJ Hollis, RS Holynski, R Holzman, B Iordanova, A Johnson, E Kane, JL Khan, N Kulinich, P Kuo, CM Lee, JW Lin, WT Manly, S Mignerey, AC Nouicer, R Olszewski, A Pak, R Park, IC Pernegger, H Reed, C Roland, C Roland, G Sagerer, J Sarin, P Sedykh, I Skulski, W Smith, CE Steinberg, P Stephans, GSF Sukhanov, A Tonjes, MB Trzupek, A Vale, C van Nieuwenhuizen, GJ Verdier, R Veres, GI Wolfs, FLH Wosiek, B Wozniak, K Wyslouch, B Zhang, J CA PHOBOS Collaboration TI Pseudorapidity dependence of charged hadron transverse momentum spectra in d+Au collisions at root s(NN)=200 GeV SO PHYSICAL REVIEW C LA English DT Article AB We have measured the transverse momentum distributions of charged hadrons in d+Au collisions at roots(NN)=200 GeV in the range of 0.5
(283)112(alpha)-->(279)110(SF), in two cases out of 22, we observed decay chains of four and five sequential alpha transitions that end in spontaneous fission of (271)Sg (T-alpha/SF=2.4(-1.0)(+4.3) min) and (267)Rf (T(SF)similar to2.3 h), longer decay chains than reported previously. We observed the new nuclide (292)116 (T-alpha=18(-6)(+16) ms,E-alpha=10.66+/-0.07 MeV) in the irradiation of the Cm-248 target at a higher energy than in previous experiments. The observed nuclear decay properties of the nuclides with Z=104-118 are compared with theoretical nuclear mass calculations and the systematic trends of spontaneous fission properties. As a whole, they give a consistent pattern of decay of the 18 even-Z neutron-rich nuclides with Z=104-118 and N=163-177. The experiments were performed with the heavy-ion beam delivered by the U400 cyclotron of the FLNR (JINR, Dubna) employing the Dubna gas-filled recoil separator. C1 Joint Inst Nucl Res, Dubna 141980, Russia. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. All Russian Res Inst Expt Phys, Russian Fed Nucl Ctr, Sarov 607190, Russia. RP Oganessian, YT (reprint author), Joint Inst Nucl Res, Dubna 141980, Russia. RI Wilk, Philip/B-5954-2008 NR 62 TC 335 Z9 347 U1 1 U2 14 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 EI 1089-490X J9 PHYS REV C JI Phys. Rev. C PD DEC PY 2004 VL 70 IS 6 AR 064609 DI 10.1103/PhysRevC.70.064609 PG 14 WC Physics, Nuclear SC Physics GA 887LR UT WOS:000226308100040 ER PT J AU Pop, VT Gyulassy, M Barrette, J Gale, C Wang, XN Xu, N AF Pop, VT Gyulassy, M Barrette, J Gale, C Wang, XN Xu, N TI Baryon junction loops and the baryon-meson anomaly at high energies SO PHYSICAL REVIEW C LA English DT Article ID HEAVY-ION COLLISIONS; FREEZE-OUT CONDITIONS; AU+AU COLLISIONS; NUCLEAR COLLISIONS; IDENTIFIED PARTICLES; ROOT(S)(NN)=200 GEV; MICROSCOPIC MODELS; STRANGE PARTICLES; HADRON-PRODUCTION; AU COLLISIONS AB A new version, v2.0, of the HIJING/B (B) over bar Monte Carlo nuclear collision event generator is introduced in order to explore further the possible role of baryon junctions loops in the baryon-meson anomaly (2
/v(T)=0.31+/-0.2 mb and 2.54+/-0.14 mb, respectively. The measurements were carried out by activation of Pb and Bi samples in a quasistellar neutron spectrum using gold as a cross section standard. With this technique the uncertainties reported in previous works could be considerably reduced. The measurements are complemented by a discussion of the recycling at the termination point of the s-process neutron capture chain in a 3M and [Fe/H]=-1.3 asymptotic giant branch star. At this metallicity, AGB stars give rise to the maximum production of s-process lead. The sensitivity of the isotopic lead abundances is discussed with respect to the remaining cross section uncertainties. The information obtained in this work is also of relevance for an assessment of the alpha activity due to a buildup of Po-210 in Pb/Bi cooled fast reactor systems.
C1 Forschungszentrum Karlsruhe, Inst Kernphys, D-76021 Karlsruhe, Germany.
Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
Univ Turin, Dipartimento Fis Gen, I-10125 Turin, Italy.
Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy.
Monash Univ, Sch Math Sci, Ctr Stellar & Planetary Astrophys, Melbourne, Vic 3800, Australia.
CERN, CH-1211 Geneva 23, Switzerland.
Max Planck Inst Astrophys, D-85740 Garching, Germany.
INAF, Osservatorio Astron Torino, I-10025 Pino Torinese, To, Italy.
RP Ratzel, U (reprint author), Forschungszentrum Karlsruhe, Inst Kernphys, POB 3640, D-76021 Karlsruhe, Germany.
EM franz.kaeppeler@ik.fzk.de
RI Mengoni, Alberto/I-1497-2012
OI Mengoni, Alberto/0000-0002-2537-0038
NR 29
TC 22
Z9 22
U1 1
U2 3
PU AMERICAN 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 DEC
PY 2004
VL 70
IS 6
AR 065803
DI 10.1103/PhysRevC.70.065803
PG 10
WC Physics, Nuclear
SC Physics
GA 887LR
UT WOS:000226308100060
ER
PT J
AU Roberts, W
AF Roberts, W
TI Phenomenological Lagrangian approach to two kaon photoproduction and
pentaquark searches
SO PHYSICAL REVIEW C
LA English
DT Article
ID POSITIVE-STRANGENESS; POSSIBLE EXPLANATION; MAGNETIC-MOMENTS; THETA(+);
BARYON; RESONANCE; PARITY; ANTIDECUPLET; STATES; WIDTH
AB We examine cross sections for the processes gammaN-->NK (K) over bar in the framework of a phenomenological Lagrangian. We include contributions from Lambda and Sigma resonances up to spin 3/2, as well as those from an exotic Theta(+). We allow the Theta(+) to have spin 1/2 or 3/2, with either positive or negative parity in each case. We also allow the state to be either isovector or isoscalar. We find that the scenario that most closely matches observations at Jefferson Laboratory requires a moderately large coupling of the Theta(+) to NK*.
C1 Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
RP Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
NR 79
TC 13
Z9 13
U1 0
U2 0
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 DEC
PY 2004
VL 70
IS 6
AR 065201
DI 10.1103/PhysRevC.70.065201
PG 15
WC Physics, Nuclear
SC Physics
GA 887LR
UT WOS:000226308100050
ER
PT J
AU Vogt, R
AF Vogt, R
TI Shadowing effects on the nuclear suppression factor, R-dAu, in d+Au
interactions
SO PHYSICAL REVIEW C
LA English
DT Article
ID PARTON DISTRIBUTIONS; QUARK PRODUCTION; LEADING ORDER; COLLISIONS;
DEPENDENCE; EVOLUTION
AB We explore how nuclear modifications to the nucleon parton distributions affect production of high-transverse-momentum hadrons in deuteron-nucleus collisions. We calculate the charged hadron spectra to leading order using standard fragmentation functions and shadowing parametrizations. We obtain the d+Au to pp ratio both in minimum bias collisions and as a function of centrality. The minimum bias results agree reasonably well with the BRAHMS data while the calculated centrality dependence underestimates the data and is a stronger function of p(T) than the data indicate.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
RP Vogt, R (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
NR 37
TC 26
Z9 26
U1 1
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
EI 1089-490X
J9 PHYS REV C
JI Phys. Rev. C
PD DEC
PY 2004
VL 70
IS 6
AR 064902
DI 10.1103/PhysRevC.70.064902
PG 6
WC Physics, Nuclear
SC Physics
GA 887LR
UT WOS:000226308100044
ER
PT J
AU Wong, CY
Zhang, WN
AF Wong, CY
Zhang, WN
TI Signature of granular structures by single-event intensity
interferometry
SO PHYSICAL REVIEW C
LA English
DT Article
ID HEAVY-ION COLLISIONS; QUARK-GLUON-PLASMA; RELATIVISTIC NUCLEAR
COLLISIONS; 1ST-ORDER PHASE-TRANSITIONS; PION INTERFEROMETRY;
FLUCTUATIONS; MATTER; COHERENCE; PICTURES; DROPLETS
AB The observation of a granular structure in high-energy heavy-ion collisions can be used as a signature for the quark-gluon plasma phase transition, if the phase transition is first order in nature. We propose methods to detect a granular structure by the single-event intensity interferometry. We find that the correlation function from a chaotic source of granular droplets exhibits large fluctuations, with maxima and minima at relative momenta which depend on the relative coordinates of the droplet centers. The presence of this type of maxima and minima of a single-event correlation function at many relative momenta is a signature for a granular structure and a first-order QCD phase transition. We further observe that the Fourier transform of the correlation function of a granular structure exhibits maxima at the relative spatial coordinates of the droplet centers, which can provide another signature of the granular structure.
C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA.
Harbin Inst Technol, Dept Phys, Harbin 150006, Peoples R China.
RP Wong, CY (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
NR 76
TC 11
Z9 12
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
EI 1089-490X
J9 PHYS REV C
JI Phys. Rev. C
PD DEC
PY 2004
VL 70
IS 6
AR 064904
DI 10.1103/PhysRevC.70.064904
PG 15
WC Physics, Nuclear
SC Physics
GA 887LR
UT WOS:000226308100046
ER
PT J
AU Wu, CY
Hua, H
Cline, D
Hayes, AB
Teng, R
Clark, RM
Fallon, P
Goergen, A
Macchiavelli, AO
Vetter, K
AF Wu, CY
Hua, H
Cline, D
Hayes, AB
Teng, R
Clark, RM
Fallon, P
Goergen, A
Macchiavelli, AO
Vetter, K
TI Multifaceted yrast structure and the onset of deformation in Sr-96,Sr-97
and Zr-98,Zr-99
SO PHYSICAL REVIEW C
LA English
DT Article
ID SHAPE COEXISTENCE; LIFETIME MEASUREMENTS; MONOPOLE STRENGTH; MASS
REGION; NUCLEI; ZR-100; STATES; TRANSITION; DETECTOR; FISSION
AB Neutron-rich Sr-96,Sr-97 and Zr-98,Zr-99 nuclei were populated as fission fragments produced by the U-238(alpha,f) fusion-fission reaction. The yrast states of these nuclei have been extended up to approximate to20 (h) over bar, which is about 6 (h) over bar on average beyond the previously known spin, by studying the prompt gamma rays in coincidence with the detection of both fission fragments. This extension allows the observation of yrast states with spins beyond approximate to4(+) in Sr-96 and Zr-98 evolving from vibrationlike states to rotationlike states. With an additional neutron, the yrast states with excitation energies above approximate to600 keV in Sr-97 and Zr-99 have the characteristics of members of rotationlike bands for both positive- and negative-parity states. However, their underlying single-particle configurations cannot be determined uniquely by the measured intensity ratios of DeltaI=1 to DeltaI=2 transitions because of possible configuration mixing. The sharp variations in the yrast structure of these nuclei are discussed in terms of the gradualness of the onset of quadrupole deformation.
C1 Univ Rochester, Dept Phys, Nucl Struct Res Lab, Rochester, NY 14627 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
RP Wu, CY (reprint author), Univ Rochester, Dept Phys, Nucl Struct Res Lab, 601 Elmwood Ave, Rochester, NY 14627 USA.
NR 43
TC 32
Z9 32
U1 0
U2 9
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
EI 1089-490X
J9 PHYS REV C
JI Phys. Rev. C
PD DEC
PY 2004
VL 70
IS 6
AR 064312
DI 10.1103/PhysRevC.70.064312
PG 9
WC Physics, Nuclear
SC Physics
GA 887LR
UT WOS:000226308100021
ER
PT J
AU Zheng, X
Aniol, K
Armstrong, DS
Averett, TD
Bertozzi, W
Binet, S
Burtin, E
Busato, E
Butuceanu, C
Calarco, J
Camsonne, A
Cates, GD
Chai, Z
Chen, JP
Choi, S
Chudakov, E
Cusanno, F
De Leo, R
Deur, A
Dieterich, S
Dutta, D
Finn, JM
Frullani, S
Gao, H
Gao, J
Garibaldi, F
Gilad, S
Gilman, R
Gomez, J
Hansen, JO
Higinbotham, DW
Hinton, W
Horn, T
de Jager, CW
Jiang, X
Kaufman, L
Kelly, J
Korsch, W
Kramer, K
LeRose, J
Lhuillier, D
Liyanage, N
Margaziotis, DJ
Marie, F
Markowitz, P
McCormick, K
Meziani, ZE
Michaels, R
Moffit, B
Nanda, S
Neyret, D
Phillips, SK
Powell, A
Pussieux, T
Reitz, B
Roche, J
Roche, R
Roedelbronn, M
Ron, G
Rvachev, M
Saha, A
Savvinov, N
Singh, J
Sirca, S
Slifer, K
Solvignon, P
Souder, P
Steiner, DJ
Strauch, S
Sulkosky, V
Tobias, A
Urciuoli, G
Vacheret, A
Wojtsekhowski, B
Xiang, H
Xiao, Y
Xiong, F
Zhang, B
Zhu, L
Zhu, X
Zolnierczuk, PA
AF Zheng, X
Aniol, K
Armstrong, DS
Averett, TD
Bertozzi, W
Binet, S
Burtin, E
Busato, E
Butuceanu, C
Calarco, J
Camsonne, A
Cates, GD
Chai, Z
Chen, JP
Choi, S
Chudakov, E
Cusanno, F
De Leo, R
Deur, A
Dieterich, S
Dutta, D
Finn, JM
Frullani, S
Gao, H
Gao, J
Garibaldi, F
Gilad, S
Gilman, R
Gomez, J
Hansen, JO
Higinbotham, DW
Hinton, W
Horn, T
de Jager, CW
Jiang, X
Kaufman, L
Kelly, J
Korsch, W
Kramer, K
LeRose, J
Lhuillier, D
Liyanage, N
Margaziotis, DJ
Marie, F
Markowitz, P
McCormick, K
Meziani, ZE
Michaels, R
Moffit, B
Nanda, S
Neyret, D
Phillips, SK
Powell, A
Pussieux, T
Reitz, B
Roche, J
Roche, R
Roedelbronn, M
Ron, G
Rvachev, M
Saha, A
Savvinov, N
Singh, J
Sirca, S
Slifer, K
Solvignon, P
Souder, P
Steiner, DJ
Strauch, S
Sulkosky, V
Tobias, A
Urciuoli, G
Vacheret, A
Wojtsekhowski, B
Xiang, H
Xiao, Y
Xiong, F
Zhang, B
Zhu, L
Zhu, X
Zolnierczuk, PA
CA Jefferson Lab Hall A Collaboration
TI Precision measurement of the neutron spin asymmetries and spin-dependent
structure functions in the valence quark region
SO PHYSICAL REVIEW C
LA English
DT Review
ID DEEP-INELASTIC-SCATTERING; NUCLEON STRUCTURE FUNCTIONS;
ELECTRON-DEUTERON SCATTERING; ELECTROMAGNETIC FORM-FACTORS;
STRUCTURE-FUNCTION G(1)(N); STRUCTURE-FUNCTION RATIO;
MUON-PROTON-SCATTERING; E-P; CROSS-SECTIONS; POLARIZED HE-3
AB We report on measurements of the neutron spin asymmetries A(1,2)(n) and polarized structure functions g(1,2)(n) at three kinematics in the deep inelastic region, with x=0.33, 0.47, and 0.60 and Q(2)=2.7, 3.5, and 4.8 (GeV/c)(2), respectively. These measurements were performed using a 5.7 GeV longitudinally polarized electron beam and a polarized He-3 target. The results for A(1)(n) and g(1)(n) at x=0.33 are consistent with previous world data and, at the two higher-x points, have improved the precision of the world data by about an order of magnitude. The new A(1)(n) data show a zero crossing around x=0.47 and the value at x=0.60 is significantly positive. These results agree with a next-to-leading-order QCD analysis of previous world data. The trend of data at high x agrees with constituent quark model predictions but disagrees with that from leading-order perturbative QCD (PQCD) assuming hadron helicity conservation. Results for A(2)(n) and g(2)(n) have a precision comparable to the best world data in this kinematic region. Combined with previous world data, the moment d(2)(n) was evaluated and the new result has improved the precision of this quantity by about a factor of 2. When combined with the world proton data, polarized quark distribution functions were extracted from the new g(1)(n)/F-1(n) values based on the quark-parton model. While results for Deltau/u agree well with predictions from various models, results for Deltad/d disagree with the leading-order PQCD prediction when hadron helicity conservation is imposed.
C1 MIT, Cambridge, MA 02139 USA.
Univ Blaise Pascal Clermont Ferrand, F-177 Aubiere, France.
CNRS, IN2P3, LPC 63, F-177 Aubiere, France.
CALTECH, Pasadena, CA 91125 USA.
Calif State Univ Los Angeles, Los Angeles, CA 90032 USA.
Florida Int Univ, Miami, FL 33199 USA.
Florida State Univ, Tallahassee, FL 32306 USA.
Univ Illinois, Urbana, IL 61801 USA.
Ist Nazl Fis Nucl, Sez Sanita, I-00161 Rome, Italy.
Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
Kent State Univ, Kent, OH 44242 USA.
Univ Kentucky, Lexington, KY 40506 USA.
Univ Maryland, College Pk, MD 20742 USA.
Univ Massachusetts, Amherst, MA 01003 USA.
Univ New Hampshire, Durham, NH 03824 USA.
Old Dominion Univ, Norfolk, VA 23529 USA.
Rutgers State Univ, Piscataway, NJ 08855 USA.
CEA Saclay, DAPNIA, SPhN, F-91191 Gif Sur Yvette, France.
Syracuse Univ, Syracuse, NY 13244 USA.
Tel Aviv Univ, IL-69978 Tel Aviv, Israel.
Temple Univ, Philadelphia, PA 19122 USA.
Univ Virginia, Charlottesville, VA 22904 USA.
Coll William & Mary, Williamsburg, VA 23187 USA.
RP MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
RI Zhu, Xiaofeng/B-9493-2011; 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
NR 162
TC 114
Z9 115
U1 0
U2 0
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 DEC
PY 2004
VL 70
IS 6
AR 065207
DI 10.1103/PhysRevC.70.065207
PG 25
WC Physics, Nuclear
SC Physics
GA 887LR
UT WOS:000226308100056
ER
PT J
AU Alishahiha, M
Silverstein, E
Tong, D
AF Alishahiha, M
Silverstein, E
Tong, D
TI DBI in the sky: Non-Gaussianity from inflation with a speed limit
SO PHYSICAL REVIEW D
LA English
DT Article
ID PROBE WMAP OBSERVATIONS; K-INFLATION; PERTURBATIONS; BRANES
AB We analyze the spectrum of density perturbations generated in models of the recently discovered "D-cceleration" mechanism of inflation. In this scenario, strong coupling quantum field theoretic effects sum to provide a Dirac-Born-Infeld-like action for the inflaton. We show that the model has a strict lower bound on the non-Gaussianity of the cosmic microwave background radiation power spectrum at an observable level, and is thus falsifiable. This, in particular, observationally distinguishes this mechanism from traditional slow-roll inflation generated by weakly interacting scalar fields. The model also favors a large observable tensor component to the cosmic microwave background radiation spectrum.
C1 Inst Studies Theoret Phys & Math IPM, Tehran, Iran.
Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
Stanford Univ, Dept Phys, Stanford, CA 94309 USA.
MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA.
RP Inst Studies Theoret Phys & Math IPM, POB 19395-5531, Tehran, Iran.
EM alishah@ipm.ir; evas@slac.stanford.edu; dtong@mit.edu
NR 49
TC 622
Z9 621
U1 0
U2 4
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 DEC
PY 2004
VL 70
IS 12
AR 123505
DI 10.1103/PhysRevD.70.123505
PG 15
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 883ZQ
UT WOS:000226054800022
ER
PT J
AU Aoki, S
Bar, O
AF Aoki, S
Bar, O
TI Twisted mass QCD, O(a) improvement, and Wilson chiral perturbation
theory
SO PHYSICAL REVIEW D
LA English
DT Article
ID LATTICE QCD; SPONTANEOUS BREAKING; CONTINUUM-LIMIT; PHASE-STRUCTURE;
U(1) PROBLEM; FERMIONS; PARITY
AB We point out a caveat in the proof for automatic O(a) improvement in twisted mass lattice QCD at maximal twist angle. With the definition for the twist angle previously given by Frezzotti and Rossi, automatic O(a) improvement can fail unless the quark mass satisfies m(q)>>a(2)Lambda(QCD)(3). We propose a different definition for the twist angle which does not require a restriction on the quark mass for automatic O(a) improvement. In order to illustrate explicitly automatic O(a) improvement we compute the pion mass in the corresponding chiral effective theory. We consider different definitions for maximal twist and show explicitly the absence or presence of the leading O(a) effect, depending on the size of the quark mass.
C1 Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan.
Brookhaven Natl Lab, Riken BNL Res Ctr, Upton, NY 11973 USA.
RP Aoki, S (reprint author), Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan.
OI Baer, Oliver/0000-0002-7480-6467
NR 35
TC 49
Z9 49
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2821
J9 PHYS REV D
JI Phys. Rev. D
PD DEC
PY 2004
VL 70
IS 11
AR 116011
DI 10.1103/PhysRevD.70.116011
PG 14
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 883ZP
UT WOS:000226054700100
ER
PT J
AU Aubert, B
Barate, R
Boutigny, D
Couderc, F
Gaillard, JM
Hicheur, A
Karyotakis, Y
Lees, JP
Tisserand, V
Zghiche, A
Palano, A
Pompili, A
Chen, JC
Qi, ND
Rong, G
Wang, P
Zhu, YS
Eigen, G
Ofte, I
Stugu, B
Abrams, GS
Borgland, AW
Breon, AB
Brown, DN
Button-Shafer, J
Cahn, RN
Charles, E
Day, CT
Gill, MS
Gritsan, AV
Groysman, Y
Jacobsen, RG
Kadel, RW
Kadyk, J
Kerth, LT
Kolomensky, YG
Kukartsev, G
Lynch, G
Mir, LM
Oddone, PJ
Orimoto, TJ
Pripstein, M
Roe, NA
Ronan, MT
Shelkov, VG
Wenzel, WA
Barrett, M
Ford, KE
Harrison, TJ
Hart, AJ
Hawkes, CM
Morgan, SE
Watson, AT
Fritsch, M
Goetzen, K
Held, T
Koch, H
Lewandowski, B
Pelizaeus, M
Steinke, M
Boyd, JT
Chevalier, N
Cottingham, WN
Kelly, MP
Latham, TE
Wilson, FF
Cuhadar-Donszelmann, T
Hearty, C
Knecht, NS
Mattison, TS
McKenna, JA
Thiessen, D
Khan, A
Kyberd, P
Teodorescu, L
Blinov, AE
Blinov, VE
Druzhinin, VP
Golubev, VB
Ivanchenko, VN
Kravchenko, EA
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Yushkov, AN
Best, D
Bruinsma, M
Chao, M
Eschrich, I
Kirkby, D
Lankford, AJ
Mandelkern, M
Mommsen, RK
Roethel, W
Stoker, DP
Buchanan, C
Hartfiel, BL
Foulkes, SD
Gary, JW
Shen, BC
Wang, K
del Re, D
Hadavand, HK
Hill, EJ
MacFarlane, DB
Paar, HP
Rahatlou, S
Sharma, V
Berryhill, JW
Campagnari, C
Dahmes, B
Levy, SL
Long, O
Lu, A
Mazur, MA
Richman, JD
Verkerke, W
Beck, TW
Eisner, AM
Heusch, CA
Lockman, WS
Nesom, G
Schalk, T
Schmitz, RE
Schumm, BA
Seiden, A
Spradlin, P
Williams, DC
Wilson, MG
Albert, J
Chen, E
Dubois-Felsmann, GP
Dvoretskii, A
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Ryd, A
Samuel, A
Yang, S
Jayatilleke, S
Mancinelli, G
Meadows, BT
Sokoloff, MD
Abe, T
Blanc, F
Bloom, P
Chen, S
Destree, J
Ford, WT
Lee, CL
Nauenberg, U
Olivas, A
Rankin, P
Smith, JG
Zhang, J
Zhang, L
Chen, A
Harton, JL
Soffer, A
Toki, WH
Wilson, RJ
Zeng, QL
Altenburg, D
Brandt, T
Brose, J
Dickopp, M
Feltresi, E
Hauke, A
Lacker, HM
Muller-Pfefferkorn, R
Nogowski, R
Otto, S
Petzold, A
Schubert, J
Schubert, KR
Schwierz, R
Spaan, B
Sundermann, JE
Bernard, D
Bonneaud, GR
Brochard, F
Grenier, P
Schrenk, S
Thiebaux, C
Vasileiadis, G
Verderi, M
Bard, DJ
Clark, PJ
Lavin, D
Muheim, F
Playfer, S
Xie, Y
Andreotti, M
Azzolini, V
Bettoni, D
Bozzi, C
Calabrese, R
Cibinetto, G
Luppi, E
Negrini, M
Piemontese, L
Sarti, A
Treadwell, E
Baldini-Ferroli, R
Calcaterra, A
de Sangro, R
Finocchiaro, G
Patteri, P
Piccolo, M
Zallo, A
Buzzo, A
Capra, R
Contri, R
Crosetti, G
Lo Vetere, M
Macri, M
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Santroni, A
Tosi, S
Bailey, S
Brandenburg, G
Morii, M
Won, E
Dubitzky, RS
Langenegger, U
Bhimji, W
Bowerman, DA
Dauncey, PD
Egede, U
Gaillard, JR
Morton, GW
Nash, JA
Nikolich, MB
Taylor, GP
Charles, MJ
Grenier, GJ
Mallik, U
Cochran, J
Crawley, HB
Lamsa, J
Meyer, WT
Prell, S
Rosenberg, EI
Yi, J
Davier, M
Grosdidier, G
Hocker, A
Laplace, S
Le Diberder, FL
Lepeltier, V
Lutz, AM
Petersen, TC
Plaszczynski, S
Schune, MH
Tantot, L
Wormser, G
Cheng, CH
Lange, DJ
Simani, MC
Wright, DM
Bevan, AJ
Chavez, CA
Coleman, JP
Forster, IJ
Fry, JR
Gabathuler, E
Gamet, R
Parry, RJ
Payne, DJ
Sloane, RJ
Touramanis, C
Back, JJ
Cormack, CM
Harrison, PF
Di Lodovico, F
Mohanty, GB
Brown, CL
Cowan, G
Flack, RL
Flaecher, HU
Green, MG
Jackson, PS
McMahon, TR
Ricciardi, S
Salvatore, F
Winter, MA
Brown, D
Davis, CL
Allison, J
Barlow, NR
Barlow, RJ
Hodgkinson, MC
Lafferty, GD
Lyon, AJ
Williams, JC
Farbin, A
Hulsbergen, WD
Jawahery, A
Kovalskyi, D
Lae, CK
Lillard, V
Roberts, DA
Blaylock, G
Dallapiccola, C
Flood, KT
Hertzbach, SS
Kofler, R
Koptchev, VB
Moore, TB
Saremi, S
Staengle, H
Willocq, S
Cowan, R
Sciolla, G
Taylor, F
Yamamoto, RK
Mangeol, DJJ
Patel, PM
Robertson, SH
Lazzaro, A
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
Godang, R
Kroeger, R
Reidy, J
Sanders, DA
Summers, DJ
Zhao, HW
Brunet, S
Cote, D
Taras, P
Nicholson, H
Fabozzi, F
Gatto, C
Lista, L
Monorchio, D
Paolucci, P
Piccolo, D
Sciacca, C
Baak, M
Bulten, H
Raven, G
Snoek, HL
Wilden, L
Jessop, CP
LoSecco, JM
Gabriel, TA
Allmendinger, T
Brau, B
Gan, KK
Honscheid, K
Hufnagel, D
Kagan, H
Kass, R
Pulliam, T
Rahimi, AM
Ter-Antonyan, R
Wong, QK
Brau, J
Frey, R
Igonkina, O
Potter, CT
Sinev, NB
Strom, D
Torrence, E
Colecchia, F
Dorigo, A
Galeazzi, F
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Tiozzo, G
Voci, C
Benayoun, M
Briand, H
Chauveau, J
David, P
de la Vaissiere, C
Del Buono, L
Hamon, O
John, MJJ
Leruste, P
Malcles, J
Ocariz, J
Pivk, M
Roos, L
T'Jampens, S
Therin, G
Manfredi, PF
Re, V
Behera, PK
Gladney, L
Guo, QH
Panetta, J
Anulli, F
Biasini, M
Peruzzi, IM
Pioppi, M
Angelini, C
Batignani, G
Bettarini, S
Bondioli, M
Bucci, F
Calderini, G
Carpinelli, M
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Martinez-Vidal, F
Morganti, M
Neri, N
Paoloni, E
Rama, M
Rizzo, G
Sandrelli, F
Walsh, J
Haire, M
Judd, D
Paick, K
Wagoner, DE
Danielson, N
Elmer, P
Lau, YP
Lu, C
Miftakov, V
Olsen, J
Smith, AJS
Telnov, AV
Bellini, F
Cavoto, G
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Gioi, LL
Mazzoni, MA
Morganti, S
Pierini, M
Piredda, G
Tehrani, FS
Voena, C
Christ, S
Wagner, G
Waldi, R
Adye, T
De Groot, N
Franek, B
Geddes, NI
Gopal, GP
Olaiya, EO
Aleksan, R
Emery, S
Gaidot, A
Ganzhur, SF
Giraud, PF
de Monchenault, GH
Kozanecki, W
Langer, M
Legendre, M
London, GW
Mayer, B
Schott, G
Vasseur, G
Yeche, C
Zito, M
Purohit, MV
Weidemann, AW
Wilson, JR
Yumiceva, FX
Aston, D
Bartoldus, R
Berger, N
Boyarski, AM
Buchmueller, OL
Claus, R
Convery, MR
Cristinziani, M
De Nardo, G
Dong, D
Dorfan, J
Dujmic, D
Dunwoodie, W
Elsen, EE
Fan, S
Field, RC
Glanzman, T
Gowdy, SJ
Hadig, T
Halyo, V
Hast, C
Hryn'ova, T
Innes, WR
Kelsey, MH
Kim, P
Kocian, ML
Leith, DWGS
Libby, J
Luitz, S
Luth, V
Lynch, HL
Marsiske, H
Messner, R
Muller, DR
O'Grady, CP
Ozcan, VE
Perazzo, A
Perl, M
Petrak, S
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Simi, G
Snyder, A
Soha, A
Stelzer, J
Su, D
Sullivan, MK
Va'vra, J
Wagner, SR
Weaver, M
Weinstein, AJR
Wisniewski, WJ
Wittgen, M
Wright, DH
Yarritu, AK
Young, CC
Burchat, PR
Edwards, AJ
Meyer, TI
Petersen, BA
Roat, C
Ahmed, S
Alam, MS
Ernst, JA
Saeed, MA
Saleem, M
Wappler, FR
Bugg, W
Krishnamurthy, M
Spanier, SM
Eckmann, R
Kim, H
Ritchie, JL
Satpathy, A
Schwitters, RF
Izen, JM
Kitayama, I
Lou, XC
Ye, S
Bianchi, F
Bona, M
Gallo, F
Gamba, D
Borean, C
Bosisio, L
Cartaro, C
Cossutti, F
Della Ricca, G
Dittongo, S
Grancagnolo, S
Lanceri, L
Poropat, P
Vitale, L
Vuagnin, G
Panvini, RS
Banerjee, S
Brown, CM
Fortin, D
Jackson, PD
Kowalewski, R
Roney, JM
Sobie, RJ
Band, HR
Dasu, S
Datta, M
Eichenbaum, AM
Graham, M
Hollar, JJ
Johnson, JR
Kutter, PE
Li, H
Liu, R
Mihalyi, A
Mohapatra, AK
Pan, Y
Prepost, R
Rubin, AE
Sekula, SJ
Tan, P
von Wimmersperg-Toeller, JH
Wu, J
Wu, SL
Yu, Z
Greene, MG
Neal, H
AF Aubert, B
Barate, R
Boutigny, D
Couderc, F
Gaillard, JM
Hicheur, A
Karyotakis, Y
Lees, JP
Tisserand, V
Zghiche, A
Palano, A
Pompili, A
Chen, JC
Qi, ND
Rong, G
Wang, P
Zhu, YS
Eigen, G
Ofte, I
Stugu, B
Abrams, GS
Borgland, AW
Breon, AB
Brown, DN
Button-Shafer, J
Cahn, RN
Charles, E
Day, CT
Gill, MS
Gritsan, AV
Groysman, Y
Jacobsen, RG
Kadel, RW
Kadyk, J
Kerth, LT
Kolomensky, YG
Kukartsev, G
Lynch, G
Mir, LM
Oddone, PJ
Orimoto, TJ
Pripstein, M
Roe, NA
Ronan, MT
Shelkov, VG
Wenzel, WA
Barrett, M
Ford, KE
Harrison, TJ
Hart, AJ
Hawkes, CM
Morgan, SE
Watson, AT
Fritsch, M
Goetzen, K
Held, T
Koch, H
Lewandowski, B
Pelizaeus, M
Steinke, M
Boyd, JT
Chevalier, N
Cottingham, WN
Kelly, MP
Latham, TE
Wilson, FF
Cuhadar-Donszelmann, T
Hearty, C
Knecht, NS
Mattison, TS
McKenna, JA
Thiessen, D
Khan, A
Kyberd, P
Teodorescu, L
Blinov, AE
Blinov, VE
Druzhinin, VP
Golubev, VB
Ivanchenko, VN
Kravchenko, EA
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Yushkov, AN
Best, D
Bruinsma, M
Chao, M
Eschrich, I
Kirkby, D
Lankford, AJ
Mandelkern, M
Mommsen, RK
Roethel, W
Stoker, DP
Buchanan, C
Hartfiel, BL
Foulkes, SD
Gary, JW
Shen, BC
Wang, K
del Re, D
Hadavand, HK
Hill, EJ
MacFarlane, DB
Paar, HP
Rahatlou, S
Sharma, V
Berryhill, JW
Campagnari, C
Dahmes, B
Levy, SL
Long, O
Lu, A
Mazur, MA
Richman, JD
Verkerke, W
Beck, TW
Eisner, AM
Heusch, CA
Lockman, WS
Nesom, G
Schalk, T
Schmitz, RE
Schumm, BA
Seiden, A
Spradlin, P
Williams, DC
Wilson, MG
Albert, J
Chen, E
Dubois-Felsmann, GP
Dvoretskii, A
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Ryd, A
Samuel, A
Yang, S
Jayatilleke, S
Mancinelli, G
Meadows, BT
Sokoloff, MD
Abe, T
Blanc, F
Bloom, P
Chen, S
Destree, J
Ford, WT
Lee, CL
Nauenberg, U
Olivas, A
Rankin, P
Smith, JG
Zhang, J
Zhang, L
Chen, A
Harton, JL
Soffer, A
Toki, WH
Wilson, RJ
Zeng, QL
Altenburg, D
Brandt, T
Brose, J
Dickopp, M
Feltresi, E
Hauke, A
Lacker, HM
Muller-Pfefferkorn, R
Nogowski, R
Otto, S
Petzold, A
Schubert, J
Schubert, KR
Schwierz, R
Spaan, B
Sundermann, JE
Bernard, D
Bonneaud, GR
Brochard, F
Grenier, P
Schrenk, S
Thiebaux, C
Vasileiadis, G
Verderi, M
Bard, DJ
Clark, PJ
Lavin, D
Muheim, F
Playfer, S
Xie, Y
Andreotti, M
Azzolini, V
Bettoni, D
Bozzi, C
Calabrese, R
Cibinetto, G
Luppi, E
Negrini, M
Piemontese, L
Sarti, A
Treadwell, E
Baldini-Ferroli, R
Calcaterra, A
de Sangro, R
Finocchiaro, G
Patteri, P
Piccolo, M
Zallo, A
Buzzo, A
Capra, R
Contri, R
Crosetti, G
Lo Vetere, M
Macri, M
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Santroni, A
Tosi, S
Bailey, S
Brandenburg, G
Morii, M
Won, E
Dubitzky, RS
Langenegger, U
Bhimji, W
Bowerman, DA
Dauncey, PD
Egede, U
Gaillard, JR
Morton, GW
Nash, JA
Nikolich, MB
Taylor, GP
Charles, MJ
Grenier, GJ
Mallik, U
Cochran, J
Crawley, HB
Lamsa, J
Meyer, WT
Prell, S
Rosenberg, EI
Yi, J
Davier, M
Grosdidier, G
Hocker, A
Laplace, S
Le Diberder, FL
Lepeltier, V
Lutz, AM
Petersen, TC
Plaszczynski, S
Schune, MH
Tantot, L
Wormser, G
Cheng, CH
Lange, DJ
Simani, MC
Wright, DM
Bevan, AJ
Chavez, CA
Coleman, JP
Forster, IJ
Fry, JR
Gabathuler, E
Gamet, R
Parry, RJ
Payne, DJ
Sloane, RJ
Touramanis, C
Back, JJ
Cormack, CM
Harrison, PF
Di Lodovico, F
Mohanty, GB
Brown, CL
Cowan, G
Flack, RL
Flaecher, HU
Green, MG
Jackson, PS
McMahon, TR
Ricciardi, S
Salvatore, F
Winter, MA
Brown, D
Davis, CL
Allison, J
Barlow, NR
Barlow, RJ
Hodgkinson, MC
Lafferty, GD
Lyon, AJ
Williams, JC
Farbin, A
Hulsbergen, WD
Jawahery, A
Kovalskyi, D
Lae, CK
Lillard, V
Roberts, DA
Blaylock, G
Dallapiccola, C
Flood, KT
Hertzbach, SS
Kofler, R
Koptchev, VB
Moore, TB
Saremi, S
Staengle, H
Willocq, S
Cowan, R
Sciolla, G
Taylor, F
Yamamoto, RK
Mangeol, DJJ
Patel, PM
Robertson, SH
Lazzaro, A
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
Godang, R
Kroeger, R
Reidy, J
Sanders, DA
Summers, DJ
Zhao, HW
Brunet, S
Cote, D
Taras, P
Nicholson, H
Fabozzi, F
Gatto, C
Lista, L
Monorchio, D
Paolucci, P
Piccolo, D
Sciacca, C
Baak, M
Bulten, H
Raven, G
Snoek, HL
Wilden, L
Jessop, CP
LoSecco, JM
Gabriel, TA
Allmendinger, T
Brau, B
Gan, KK
Honscheid, K
Hufnagel, D
Kagan, H
Kass, R
Pulliam, T
Rahimi, AM
Ter-Antonyan, R
Wong, QK
Brau, J
Frey, R
Igonkina, O
Potter, CT
Sinev, NB
Strom, D
Torrence, E
Colecchia, F
Dorigo, A
Galeazzi, F
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Tiozzo, G
Voci, C
Benayoun, M
Briand, H
Chauveau, J
David, P
de la Vaissiere, C
Del Buono, L
Hamon, O
John, MJJ
Leruste, P
Malcles, J
Ocariz, J
Pivk, M
Roos, L
T'Jampens, S
Therin, G
Manfredi, PF
Re, V
Behera, PK
Gladney, L
Guo, QH
Panetta, J
Anulli, F
Biasini, M
Peruzzi, IM
Pioppi, M
Angelini, C
Batignani, G
Bettarini, S
Bondioli, M
Bucci, F
Calderini, G
Carpinelli, M
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Martinez-Vidal, F
Morganti, M
Neri, N
Paoloni, E
Rama, M
Rizzo, G
Sandrelli, F
Walsh, J
Haire, M
Judd, D
Paick, K
Wagoner, DE
Danielson, N
Elmer, P
Lau, YP
Lu, C
Miftakov, V
Olsen, J
Smith, AJS
Telnov, AV
Bellini, F
Cavoto, G
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Gioi, LL
Mazzoni, MA
Morganti, S
Pierini, M
Piredda, G
Tehrani, FS
Voena, C
Christ, S
Wagner, G
Waldi, R
Adye, T
De Groot, N
Franek, B
Geddes, NI
Gopal, GP
Olaiya, EO
Aleksan, R
Emery, S
Gaidot, A
Ganzhur, SF
Giraud, PF
de Monchenault, GH
Kozanecki, W
Langer, M
Legendre, M
London, GW
Mayer, B
Schott, G
Vasseur, G
Yeche, C
Zito, M
Purohit, MV
Weidemann, AW
Wilson, JR
Yumiceva, FX
Aston, D
Bartoldus, R
Berger, N
Boyarski, AM
Buchmueller, OL
Claus, R
Convery, MR
Cristinziani, M
De Nardo, G
Dong, D
Dorfan, J
Dujmic, D
Dunwoodie, W
Elsen, EE
Fan, S
Field, RC
Glanzman, T
Gowdy, SJ
Hadig, T
Halyo, V
Hast, C
Hryn'ova, T
Innes, WR
Kelsey, MH
Kim, P
Kocian, ML
Leith, DWGS
Libby, J
Luitz, S
Luth, V
Lynch, HL
Marsiske, H
Messner, R
Muller, DR
O'Grady, CP
Ozcan, VE
Perazzo, A
Perl, M
Petrak, S
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Simi, G
Snyder, A
Soha, A
Stelzer, J
Su, D
Sullivan, MK
Va'vra, J
Wagner, SR
Weaver, M
Weinstein, AJR
Wisniewski, WJ
Wittgen, M
Wright, DH
Yarritu, AK
Young, CC
Burchat, PR
Edwards, AJ
Meyer, TI
Petersen, BA
Roat, C
Ahmed, S
Alam, MS
Ernst, JA
Saeed, MA
Saleem, M
Wappler, FR
Bugg, W
Krishnamurthy, M
Spanier, SM
Eckmann, R
Kim, H
Ritchie, JL
Satpathy, A
Schwitters, RF
Izen, JM
Kitayama, I
Lou, XC
Ye, S
Bianchi, F
Bona, M
Gallo, F
Gamba, D
Borean, C
Bosisio, L
Cartaro, C
Cossutti, F
Della Ricca, G
Dittongo, S
Grancagnolo, S
Lanceri, L
Poropat, P
Vitale, L
Vuagnin, G
Panvini, RS
Banerjee, S
Brown, CM
Fortin, D
Jackson, PD
Kowalewski, R
Roney, JM
Sobie, RJ
Band, HR
Dasu, S
Datta, M
Eichenbaum, AM
Graham, M
Hollar, JJ
Johnson, JR
Kutter, PE
Li, H
Liu, R
Mihalyi, A
Mohapatra, AK
Pan, Y
Prepost, R
Rubin, AE
Sekula, SJ
Tan, P
von Wimmersperg-Toeller, JH
Wu, J
Wu, SL
Yu, Z
Greene, MG
Neal, H
CA BABAR Collaboration
TI Search for B-meson decays to two-body final states with a(0)(980) mesons
SO PHYSICAL REVIEW D
LA English
DT Article
AB We present a search for B decays to charmless final states involving charged or neutral a(0) mesons. The data sample corresponds to 89x10(6) B(B) over bar pairs collected with the BABAR detector operating at the PEP-II asymmetric-energy B Factory at Stanford Linear Accelerator Center. We find no significant signals and determine the following 90% C.L. upper limits: B(B-0-->a(0)(-)pi(+))<5.1x10(-6), B(B-0-->a(0)(-)K(+))<2.1x10(-6), B(B--->a(0)(-)(K) over bar (0))<3.9x10(-6), B(B+-->a(0)(0)pi(+))<5.8x10(-6), B(B+-->a(0)(0)K(+))<2.5x10(-6), and B(B-0-->a(0)(0)K(0))<7.8x10(-6), where in all cases B indicates the product of branching fractions for B-->a(0)X and a(0)-->etapi, where X indicates K or pi.
C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France.
Univ Bari, Dipartmento Fis, I-70126 Bari, Italy.
Ist Nazl Fis Nucl, I-70126 Bari, Italy.
Inst High Energy Phys, Beijing 100039, Peoples R China.
Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
Univ Calif Berkeley, Berkeley, CA 94720 USA.
Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
Ruhr Univ Bochum, Inst Phys Expt, D-44780 Bochum, Germany.
Univ Bristol, Bristol BS8 1TL, Avon, England.
Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
Brunel Univ, Uxbridge UB8 3PH, Middx, England.
Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
Univ Calif Irvine, Irvine, CA 92697 USA.
Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
Univ Calif Riverside, Riverside, CA 92521 USA.
Univ Calif San Diego, La Jolla, CA 92093 USA.
Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA.
CALTECH, Pasadena, CA 91125 USA.
Univ Cincinnati, Cincinnati, OH 45221 USA.
Univ Colorado, Boulder, CO 80309 USA.
Colorado State Univ, Ft Collins, CO 80523 USA.
Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
Ecole Polytech, LLR, F-91128 Palaiseau, France.
Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy.
Ist Nazl Fis Nucl, I-44100 Ferrara, Italy.
Florida A&M Univ, Tallahassee, FL 32307 USA.
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Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England.
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Iowa State Univ, Ames, IA 50011 USA.
Lab Accelerateur Lineaire, F-91898 Orsay, France.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Univ Liverpool, Liverpool L69 72E, Merseyside, England.
Univ London, Queen Mary, London E1 4NS, England.
Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England.
Univ Louisville, Louisville, KY 40292 USA.
Univ Manchester, Manchester M13 9PL, Lancs, England.
Univ Maryland, College Pk, MD 20742 USA.
Univ Massachusetts, Amherst, MA 01003 USA.
MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
McGill Univ, Montreal, PQ H3A 2T8, Canada.
Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
Ist Nazl Fis Nucl, I-20133 Milan, Italy.
Univ Mississippi, University, MS 38677 USA.
Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada.
Mt Holyoke Coll, S Hadley, MA 01075 USA.
Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy.
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NIKHEF, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands.
Univ Notre Dame, Notre Dame, IN 46556 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
Ohio State Univ, Columbus, OH 43210 USA.
Univ Oregon, Eugene, OR 97403 USA.
Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
Ist Nazl Fis Nucl, I-35131 Padua, Italy.
Univ Paris 06, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France.
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Univ Penn, Philadelphia, PA 19104 USA.
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Prairie View A&M Univ, Prairie View, TX 77446 USA.
Princeton Univ, Princeton, NJ 08544 USA.
Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
Ist Nazl Fis Nucl, I-00185 Rome, Italy.
Univ Rostock, D-18051 Rostock, Germany.
Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France.
Univ S Carolina, Columbia, SC 29208 USA.
Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
Stanford Univ, Stanford, CA 94305 USA.
SUNY Albany, Albany, NY 12222 USA.
Univ Tennessee, Knoxville, TN 37996 USA.
Univ Texas, Austin, TX 78712 USA.
Univ Texas, Richardson, TX 75083 USA.
Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
Ist Nazl Fis Nucl, I-10125 Turin, Italy.
Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy.
Ist Nazl Fis Nucl, I-34127 Trieste, Italy.
Vanderbilt Univ, Nashville, TN 37235 USA.
Univ Victoria, Victoria, BC V8W 3P6, Canada.
Univ Wisconsin, Madison, WI 53706 USA.
Univ Basilicata, I-85100 Potenza, Italy.
Univ Valencia, CSIC, Inst Fis Corpuscular, Valencia, Spain.
Yale Univ, New Haven, CT 06511 USA.
RP Phys Particules Lab, F-74941 Annecy Le Vieux, France.
RI Rizzo, Giuliana/A-8516-2015; Saeed, Mohammad Alam/J-7455-2012; Negrini,
Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Luppi,
Eleonora/A-4902-2015; Sarti, Alessio/I-2833-2012; Bellini,
Fabio/D-1055-2009; de Groot, Nicolo/A-2675-2009; Rotondo,
Marcello/I-6043-2012; Neri, Nicola/G-3991-2012; Lista, Luca/C-5719-2008;
de Sangro, Riccardo/J-2901-2012; Patrignani, Claudia/C-5223-2009; Forti,
Francesco/H-3035-2011; M, Saleem/B-9137-2013; Cavallo,
Nicola/F-8913-2012; crosetti, nanni/H-3040-2011; Roe,
Natalie/A-8798-2012; Lo Vetere, Maurizio/J-5049-2012; Grancagnolo,
Sergio/J-3957-2015; 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; Calcaterra,
Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Kravchenko,
Evgeniy/F-5457-2015; Calabrese, Roberto/G-4405-2015; Mir,
Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky,
Yury/I-3510-2015
OI Cavoto, Gianluca/0000-0003-2161-918X; Wilson,
Robert/0000-0002-8184-4103; Re, Valerio/0000-0003-0697-3420; Raven,
Gerhard/0000-0002-2897-5323; Cibinetto, Gianluigi/0000-0002-3491-6231;
Galeazzi, Fulvio/0000-0002-6830-9982; Sciacca,
Crisostomo/0000-0002-8412-4072; Adye, Tim/0000-0003-0627-5059; Lafferty,
George/0000-0003-0658-4919; Rizzo, Giuliana/0000-0003-1788-2866;
Faccini, Riccardo/0000-0003-2613-5141; Cristinziani,
Markus/0000-0003-3893-9171; Saeed, Mohammad Alam/0000-0002-3529-9255;
Negrini, Matteo/0000-0003-0101-6963; Monge, Maria
Roberta/0000-0003-1633-3195; Luppi, Eleonora/0000-0002-1072-5633; Sarti,
Alessio/0000-0001-5419-7951; Bellini, Fabio/0000-0002-2936-660X;
Rotondo, Marcello/0000-0001-5704-6163; Neri, Nicola/0000-0002-6106-3756;
de Sangro, Riccardo/0000-0002-3808-5455; Patrignani,
Claudia/0000-0002-5882-1747; Forti, Francesco/0000-0001-6535-7965; Lo
Vetere, Maurizio/0000-0002-6520-4480; Grancagnolo,
Sergio/0000-0001-8490-8304; 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; Calcaterra,
Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636;
Calabrese, Roberto/0000-0002-1354-5400; Mir,
Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal,
F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975
NR 14
TC 35
Z9 35
U1 0
U2 1
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 DEC
PY 2004
VL 70
IS 11
AR 111102
DI 10.1103/PhysRevD.70.111102
PG 8
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 883ZP
UT WOS:000226054700002
ER
PT J
AU Aubert, B
Barate, R
Boutigny, D
Couderc, F
Gaillard, JM
Hicheur, A
Karyotakis, Y
Lees, JP
Tisserand, V
Zghiche, A
Palano, A
Pompili, A
Chen, JC
Qi, ND
Rong, G
Wang, P
Zhu, YS
Eigen, G
Ofte, I
Stugu, B
Abrams, GS
Borgland, AW
Breon, AB
Brown, DN
Button-Shafer, J
Cahn, RN
Charles, E
Day, CT
Gill, MS
Gritsan, AV
Groysman, Y
Jacobsen, RG
Kadel, RW
Kadyk, J
Kerth, LT
Kolomensky, YG
Kukartsev, G
Lynch, G
Mir, LM
Oddone, PJ
Orimoto, TJ
Pripstein, M
Roe, NA
Ronan, MT
Shelkov, VG
Wenzel, WA
Barrett, M
Ford, KE
Harrison, TJ
Hart, AJ
Hawkes, CM
Morgan, SE
Watson, AT
Fritsch, M
Goetzen, K
Held, T
Koch, H
Lewandowski, B
Pelizaeus, M
Steinke, M
Boyd, JT
Chevalier, N
Cottingham, WN
Kelly, MP
Latham, TE
Wilson, FF
Cuhadar-Donszelmann, T
Hearty, C
Knecht, NS
Mattison, TS
McKenna, JA
Thiessen, D
Khan, A
Kyberd, P
Teodorescu, L
Blinov, AE
Blinov, VE
Druzhinin, VP
Golubev, VB
Ivanchenko, VN
Kravchenko, EA
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Yushkov, AN
Best, D
Bruinsma, M
Chao, M
Eschrich, I
Kirkby, D
Lankford, AJ
Mandelkern, M
Mommsen, RK
Roethel, W
Stoker, DP
Buchanan, C
Hartfiel, BL
Foulkes, SD
Gary, JW
Shen, BC
Wang, K
del Re, D
Hadavand, HK
Hill, EJ
MacFarlane, DB
Paar, HP
Rahatlou, S
Sharma, V
Berryhill, JW
Campagnari, C
Dahmes, B
Levy, SL
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Mazur, MA
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Verkerke, W
Beck, TW
Eisner, AM
Heusch, CA
Lockman, WS
Nesom, G
Schalk, T
Schmitz, RE
Schumm, BA
Seiden, A
Spradlin, P
Williams, DC
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Dvoretskii, A
Hitlin, DG
Narsky, I
Piatenko, T
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Jayatilleke, S
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Wilson, RJ
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Brandt, T
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Sobie, RJ
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Graham, M
Hollar, JJ
Johnson, JR
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Li, H
Liu, R
Mihalyi, A
Mohapatra, AK
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Rubin, AE
Sekula, SJ
Tan, P
von Wimmersperg-Toeller, JH
Wu, J
Wu, SL
Yu, Z
Greene, MG
Neal, H
AF Aubert, B
Barate, R
Boutigny, D
Couderc, F
Gaillard, JM
Hicheur, A
Karyotakis, Y
Lees, JP
Tisserand, V
Zghiche, A
Palano, A
Pompili, A
Chen, JC
Qi, ND
Rong, G
Wang, P
Zhu, YS
Eigen, G
Ofte, I
Stugu, B
Abrams, GS
Borgland, AW
Breon, AB
Brown, DN
Button-Shafer, J
Cahn, RN
Charles, E
Day, CT
Gill, MS
Gritsan, AV
Groysman, Y
Jacobsen, RG
Kadel, RW
Kadyk, J
Kerth, LT
Kolomensky, YG
Kukartsev, G
Lynch, G
Mir, LM
Oddone, PJ
Orimoto, TJ
Pripstein, M
Roe, NA
Ronan, MT
Shelkov, VG
Wenzel, WA
Barrett, M
Ford, KE
Harrison, TJ
Hart, AJ
Hawkes, CM
Morgan, SE
Watson, AT
Fritsch, M
Goetzen, K
Held, T
Koch, H
Lewandowski, B
Pelizaeus, M
Steinke, M
Boyd, JT
Chevalier, N
Cottingham, WN
Kelly, MP
Latham, TE
Wilson, FF
Cuhadar-Donszelmann, T
Hearty, C
Knecht, NS
Mattison, TS
McKenna, JA
Thiessen, D
Khan, A
Kyberd, P
Teodorescu, L
Blinov, AE
Blinov, VE
Druzhinin, VP
Golubev, VB
Ivanchenko, VN
Kravchenko, EA
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Yushkov, AN
Best, D
Bruinsma, M
Chao, M
Eschrich, I
Kirkby, D
Lankford, AJ
Mandelkern, M
Mommsen, RK
Roethel, W
Stoker, DP
Buchanan, C
Hartfiel, BL
Foulkes, SD
Gary, JW
Shen, BC
Wang, K
del Re, D
Hadavand, HK
Hill, EJ
MacFarlane, DB
Paar, HP
Rahatlou, S
Sharma, V
Berryhill, JW
Campagnari, C
Dahmes, B
Levy, SL
Long, O
Lu, A
Mazur, MA
Richman, JD
Verkerke, W
Beck, TW
Eisner, AM
Heusch, CA
Lockman, WS
Nesom, G
Schalk, T
Schmitz, RE
Schumm, BA
Seiden, A
Spradlin, P
Williams, DC
Wilson, MG
Albert, J
Chen, E
Dubois-Felsmann, GP
Dvoretskii, A
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Ryd, A
Samuel, A
Yang, S
Jayatilleke, S
Mancinelli, G
Meadows, BT
Sokoloff, MD
Abe, T
Blanc, F
Bloom, P
Chen, S
Ford, WT
Nauenberg, U
Olivas, A
Rankin, P
Smith, JG
Zhang, J
Zhang, L
Chen, A
Harton, JL
Soffer, A
Toki, WH
Wilson, RJ
Zeng, QL
Altenburg, D
Brandt, T
Brose, J
Dickopp, M
Feltresi, E
Hauke, A
Lacker, HM
Muller-Pfefferkorn, R
Nogowski, R
Otto, S
Petzold, A
Schubert, J
Schubert, KR
Schwierz, R
Spaan, B
Sundermann, JE
Bernard, D
Bonneaud, GR
Brochard, F
Grenier, P
Schrenk, S
Thiebaux, C
Vasileiadis, G
Verderi, M
Bard, DJ
Clark, PJ
Lavin, D
Muheim, F
Playfer, S
Xie, Y
Andreotti, M
Azzolini, V
Bettoni, D
Bozzi, C
Calabrese, R
Cibinetto, G
Luppi, E
Negrini, M
Piemontese, L
Sarti, A
Treadwell, E
Baldini-Ferroli, R
Calcaterra, A
de Sangro, R
Finocchiaro, G
Patteri, P
Piccolo, M
Zallo, A
Buzzo, A
Capra, R
Contri, R
Crosetti, G
Lo Vetere, M
Macri, M
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Santroni, A
Tosi, S
Bailey, S
Brandenburg, G
Morii, M
Won, E
Dubitzky, RS
Langenegger, U
Bhimji, W
Bowerman, DA
Dauncey, PD
Egede, U
Gaillard, JR
Morton, GW
Nash, JA
Nikolich, MB
Taylor, GP
Charles, MJ
Grenier, GJ
Mallik, U
Cochran, J
Crawley, HB
Lamsa, J
Meyer, WT
Prell, S
Rosenberg, EI
Yi, J
Davier, M
Grosdidier, G
Hocker, A
Laplace, S
Le Diberder, F
Lepeltier, V
Lutz, AM
Petersen, TC
Plaszczynski, S
Schune, MH
Tantot, L
Wormser, G
Cheng, CH
Lange, DJ
Simani, MC
Wright, DM
Bevan, AJ
Chavez, CA
Coleman, JP
Forster, IJ
Fry, JR
Gabathuler, E
Gamet, R
Parry, RJ
Payne, DJ
Sloane, RJ
Touramanis, C
Back, JJ
Cormack, CM
Harrison, PF
Di Lodovico, F
Mohanty, GB
Brown, CL
Cowan, G
Flack, RL
Flaecher, HU
Green, MG
Jackson, PS
McMahon, TR
Ricciardi, S
Salvatore, F
Winter, MA
Brown, D
Davis, CL
Allison, J
Barlow, NR
Barlow, RJ
Hodgkinson, MC
Lafferty, GD
Lyon, AJ
Williams, JC
Farbin, A
Hulsbergen, WD
Jawahery, A
Kovalskyi, D
Lae, CK
Lillard, V
Roberts, DA
Blaylock, G
Dallapiccola, C
Flood, KT
Hertzbach, SS
Koeneke, K
Kofler, R
Koptchev, VB
Moore, TB
Saremi, S
Staengle, H
Willocq, S
Cowan, R
Sciolla, G
Taylor, F
Yamamoto, RK
Mangeol, DJJ
Patel, PM
Robertson, SH
Lazzaro, A
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
Godang, R
Kroeger, R
Reidy, J
Sanders, DA
Summers, DJ
Zhao, HW
Brunet, S
Cote, D
Taras, P
Nicholson, H
Fabozzi, F
Gatto, C
Lista, L
Monorchio, D
Paolucci, P
Piccolo, D
Sciacca, C
Baak, M
Bulten, H
Raven, G
Snoek, HL
Wilden, L
Jessop, CP
LoSecco, JM
Gabriel, TA
Allmendinger, T
Brau, B
Gan, KK
Honscheid, K
Hufnagel, D
Kagan, H
Kass, R
Pulliam, T
Rahimi, AM
Ter-Antonyan, R
Wong, QK
Brau, J
Frey, R
Igonkina, O
Potter, CT
Sinev, NB
Strom, D
Torrence, E
Colecchia, F
Dorigo, A
Galeazzi, F
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Tiozzo, G
Voci, C
Benayoun, M
Briand, H
Chauveau, J
David, P
de la Vaissiere, C
Del Buono, L
Hamon, O
John, MJJ
Leruste, P
Malcles, J
Ocariz, J
Pivk, M
Roos, L
T'Jampens, S
Therin, G
Manfredi, PF
Re, V
Behera, PK
Gladney, L
Guo, QH
Panetta, J
Anulli, F
Biasini, M
Peruzzi, IM
Pioppi, M
Angelini, C
Batignani, G
Bettarini, S
Bondioli, M
Bucci, F
Calderini, G
Carpinelli, M
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Martinez-Vidal, F
Morganti, M
Neri, N
Paoloni, E
Rama, M
Rizzo, G
Sandrelli, F
Walsh, J
Haire, M
Judd, D
Paick, K
Wagoner, DE
Danielson, N
Elmer, P
Lau, YP
Lu, C
Miftakov, V
Olsen, J
Smith, AJS
Telnov, AV
Bellini, F
Cavoto, G
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Li Gioi, L
Mazzoni, MA
Morganti, S
Pierini, M
Piredda, G
Tehrani, FS
Voena, C
Christ, S
Wagner, G
Waldi, R
Adye, T
De Groot, N
Franek, B
Geddes, NI
Gopal, GP
Olaiya, EO
Aleksan, R
Emery, S
Gaidot, A
Ganzhur, SF
Giraud, PF
de Monchenault, GH
Kozanecki, W
Langer, M
Legendre, M
London, GW
Mayer, B
Schott, G
Vasseur, G
Yeche, C
Zito, M
Purohit, MV
Weidemann, AW
Wilson, JR
Yumiceva, FX
Aston, D
Bartoldus, R
Berger, N
Boyarski, AM
Buchmueller, OL
Claus, R
Convery, MR
Cristinziani, M
De Nardo, G
Dong, D
Dorfan, J
Dujmic, D
Dunwoodie, W
Elsen, EE
Fan, S
Field, RC
Glanzman, T
Gowdy, SJ
Hadig, T
Halyo, V
Hast, C
Hryn'ova, T
Innes, WR
Kelsey, MH
Kim, P
Kocian, ML
Leith, DWGS
Libby, J
Luitz, S
Luth, V
Lynch, HL
Marsiske, H
Messner, R
Muller, DR
O'Grady, CP
Ozcan, VE
Perazzo, A
Perl, M
Petrak, S
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Simi, G
Snyder, A
Soha, A
Stelzer, J
Su, D
Sullivan, MK
Va'vra, J
Wagner, SR
Weaver, M
Weinstein, AJR
Wisniewski, WJ
Wittgen, M
Wright, DH
Yarritu, AK
Young, CC
Burchat, PR
Edwards, AJ
Meyer, TI
Petersen, BA
Roat, C
Ahmed, S
Alam, MS
Ernst, JA
Saeed, MA
Saleem, M
Wappler, FR
Bugg, W
Krishnamurthy, M
Spanier, SM
Eckmann, R
Kim, H
Ritchie, JL
Satpathy, A
Schwitters, RF
Izen, JM
Kitayama, I
Lou, XC
Ye, S
Bianchi, F
Bona, M
Gallo, F
Gamba, D
Borean, C
Bosisio, L
Cartaro, C
Cossutti, F
Della Ricca, G
Dittongo, S
Grancagnolo, S
Lanceri, L
Poropat, P
Vitale, L
Vuagnin, G
Panvini, RS
Banerjee, S
Brown, CM
Fortin, D
Jackson, PD
Kowalewski, R
Roney, JM
Sobie, RJ
Band, HR
Dasu, S
Datta, M
Eichenbaum, AM
Graham, M
Hollar, JJ
Johnson, JR
Kutter, PE
Li, H
Liu, R
Mihalyi, A
Mohapatra, AK
Pan, Y
Prepost, R
Rubin, AE
Sekula, SJ
Tan, P
von Wimmersperg-Toeller, JH
Wu, J
Wu, SL
Yu, Z
Greene, MG
Neal, H
CA BABAR Collaboration
TI Measurement of branching fractions and CP and isospin asymmetries for B
-> K-*gamma
SO PHYSICAL REVIEW D
LA English
DT Article
ID K-ASTERISK-GAMMA; TO-LEADING ORDER; B-MESONS; DECAYS; DETECTOR
AB The branching fractions of the decays B-0-->K(*0)gamma and B+-->K(*+)gamma are measured using a sample of 88x10(6)B(B) over bar events collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider. We find B(B-0-->K(*0)gamma)=[3.92+/-0.20(stat)+/-0.24(syst)]x10(-5), B(B+-->K(*+)gamma)=[3.87+/-0.28(stat)+/-0.26(syst)]x10(-5). Our measurements also constrain the direct CP asymmetry to be -0.074K(*)gamma)<0.049 and the isospin asymmetry to be -0.046. If G is as light as possible, 300 keV 0.1), the radial force was negative regardless of the particle size and refractive index. For weakly absorbing particles (k(2) < 0.1), the direction of the force depended on both the particle size and the extinction coefficient. The calculated results for k(2) = 0.005 showed that the radial force switched from the positive direction to negative direction as the particle size increased. (C) 2004 Elsevier B.V. All rights reserved.
C1 Natl Energy Technol Lab, Pittsburgh, PA 15236 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 10
TC 2
Z9 2
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0030-4018
J9 OPT COMMUN
JI Opt. Commun.
PD NOV 16
PY 2004
VL 241
IS 4-6
BP 271
EP 277
DI 10.1016/j.optcom.2004.07.064
PG 7
WC Optics
SC Optics
GA 868TF
UT WOS:000224935200006
ER
PT J
AU Vali, H
Weiss, B
Li, YL
Sears, SK
Kim, SS
Kirschvink, JL
Zhang, L
AF Vali, H
Weiss, B
Li, YL
Sears, SK
Kim, SS
Kirschvink, JL
Zhang, L
TI Formation of tabular single-domain magnetite induced by Geobacter
metallireducens GS-15
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
ID BIOGENIC MAGNETITE; THERMOPHILIC BACTERIUM; VERWEY TRANSITION;
CRYSTAL-GROWTH; IRON; BIOMINERALIZATION; REDUCTION; SEDIMENTS;
MINERALIZATION; MAGNETOFOSSILS
AB Distinct morphological characteristics of magnetite formed intracellularly by magnetic bacteria (magnetosome) are invoked as compelling evidence for biological activity on Earth and possibly on Mars. Crystals of magnetite produced extracellularly by a variety of bacteria including Geobacter metallireducens GS-15, thermophilic bacteria, and psychrotolerant bacteria are, however, traditionally not thought to have nearly as distinct morphologies. The size and shape of extracellular magnetite depend on the culture conditions and type of bacteria. Under typical CO2-rich culture conditions, GS-15 is known to produce superparamagnetic magnetite (crystal diameters of approximately <30 nm). In the current study, we were able to produce a unique form of tabular, single-domain magnetite under nontraditional (low-CO2) culture conditions. This magnetite has a distinct crystal habit and magnetic properties. This magnetite could be used as a biosignature to recognize ancient biological activities in terrestrial and extraterrestrial environments and also may be a major carrier of the magnetization in natural sediments.
C1 McGill Univ, Dept Anat & Cell Biol, Montreal, PQ H3A 2B2, Canada.
McGill Univ, Facil Electron Microscopy Res, Montreal, PQ H3A 2B2, Canada.
McGill Univ, Dept Earth & Planetary Sci, Montreal, PQ H3A 2A7, Canada.
CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA.
CALTECH, Jet Propuls Lab, Pasadena, CA 91125 USA.
MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA.
Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29803 USA.
RP Vali, H (reprint author), McGill Univ, Dept Anat & Cell Biol, 3640 Univ St, Montreal, PQ H3A 2B2, Canada.
EM vali@eps.mcgill.ca
RI Li, Yiliang/E-9916-2010; Sears, Stephen Kelly/F-3522-2012; Vali,
Hojatollah/F-3511-2012
OI Vali, Hojatollah/0000-0003-3464-9943
NR 40
TC 53
Z9 60
U1 3
U2 16
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 NOV 16
PY 2004
VL 101
IS 46
BP 16121
EP 16126
DI 10.1073/pnas.0404040101
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 872RO
UT WOS:000225226200009
PM 15525704
ER
PT J
AU Kim, S
Chin, K
Gray, JW
Bishop, JM
AF Kim, S
Chin, K
Gray, JW
Bishop, JM
TI A screen for genes that suppress loss of contact inhibition:
Identification of ING4 as a candidate tumor suppressor gene in human
cancer
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE mycn; proliferation; cell transformation; mutation; breast cancer
ID ACUTE LYMPHOBLASTIC-LEUKEMIA; GENOMIC INSTABILITY; CELL-PROLIFERATION;
PROSTATE-CANCER; FREQUENT LOSS; PHD-FINGER; EXPRESSION; HETEROZYGOSITY;
GROWTH; CHILDHOOD
AB We have devised a screen for genes that suppress the loss of contact inhibition elicited by overexpression of the protooncogene MYCN. The initial application of this screen detected nine distinctive suppressors within a representative human cDNA library. One of these genes was ING4, a potential tumor suppressor gene that maps to human chromosome 12p13. Ectopic expression of ING4 suppressed the loss of contact inhibition elicited by either MYCN or MYC but had no direct effect on cellular proliferation. Pursuing the possibility that ING4 might be a tumor suppressor gene, we found inactivating mutations in ING4 transcripts from various human cancer cell lines. In addition, we used comparative genomic hybridization to detect deletion of the ING4 locus in 10-20% of human breast cancer cell lines and primary breast tumors. Ectopic expression of ING4 attenuated the growth of T47D human breast cancer cells in soft agar. We conclude that ING4 is a strong candidate as a tumor suppressor gene.
C1 Univ Calif San Francisco, George Williams Hooper Fdn, San Francisco, CA 94143 USA.
Univ Calif San Francisco, Ctr Comprehens Canc, San Francisco, CA 94143 USA.
Univ Calif San Francisco, Dept Microbiol & Immunol, San Francisco, CA 94143 USA.
Univ Calif San Francisco, Dept Lab Med, San Francisco, CA 94143 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
RP Kim, S (reprint author), Univ Calif San Francisco, George Williams Hooper Fdn, Box 0552 HSW1536,513 Parnassus Ave, San Francisco, CA 94143 USA.
EM suwon@itsa.ucsf.edu
FU NCI NIH HHS [CA44338, P50 CA058207, P50 CA58207]
NR 30
TC 103
Z9 127
U1 1
U2 1
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD NOV 16
PY 2004
VL 101
IS 46
BP 16251
EP 16256
DI 10.1073/pnas.0407158101
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 872RO
UT WOS:000225226200031
PM 15528276
ER
PT J
AU Mariappan, SVS
Cheng, X
van Breemen, RB
Silks, LA
Gupta, G
AF Mariappan, SVS
Cheng, X
van Breemen, RB
Silks, LA
Gupta, G
TI Analysis of GAA/TTC DNA triplexes using nuclear magnetic resonance and
electrospray ionization mass spectrometry
SO ANALYTICAL BIOCHEMISTRY
LA English
DT Article; Proceedings Paper
CT 15th Conference of the
International-Society-for-Environment-Epidemiology
CY SEP 23-26, 2003
CL PERTH, AUSTRALIA
SP Int Soc Environm Epidemiol, CommonWealth Dept Hlth & Aged Care, US EPA
DE Friedreich's ataxia; GAA/TTC; DNA triplexes; NMR; ESI-MS; FRDA;
destabilization; minor groove binders; intercalators
ID FRIEDREICHS-ATAXIA; NONCOVALENT COMPLEXES; REPEAT EXPANSION; HELIX
FORMATION; BINDING DRUGS; GAA; TRANSCRIPTION; SPECTROSCOPY; ELONGATION;
HAIRPINS
AB The formation of a GAA/TTC DNA triplex has been implicated in Friedreich's ataxia. The destabilization of GAA/TTC DNA triplexes either by pH or by binding to appropriate ligands was analyzed by nuclear magnetic resonance (NMR) and positive-ion electrospray mass spectrometry. The triplexes and duplexes were identified by changes in the NMR chemical shifts of H8, H1, H4, (15)N7, and (15)N4. The lowest pH at which the duplex is detectable depends upon the overall stability and the relative number of Hoogsteen C(o)G to T(o)A basepairs. A melting pH (pH(m)) of 7.6 was observed for the destabilization of the (GAA)(2)T-4(TTC)(2)T-4(CTT)(2) triplex to the corresponding Watson-Crick duplex and the T-4(CTT)(2) overhang. The mass spectrometric analyses of (TTC)(6).(GAA)(6degrees)(TTC)(6) triplex detected ions due to both triplex and single-stranded oligonucleotides under acidic conditions. The triplex ions disappeared completely at alkaline pH. Duplex and single strands were detectable only at neutral and alkaline pH values. Mass spectrometric analyses also showed that minor groove-binding ligands berenil, netropsin, and distamycin and the intercalating ligand acridine orange destabilize the (TTC)(6).(GAA)(6degrees)(TTC)(6) triplex. These NMR and mass spectrometric methods may function as screening assays for the discovery of agents that destabilize GAA/TTC triplexes and as general methods for the characterization of structure, dynamics, and stability of DNA and DNA-ligand complexes. (C) 2004 Elsevier Inc. All rights reserved.
C1 Univ Illinois, Dept Med Chem & Pharmacognosy, Chicago, IL 60612 USA.
Los Alamos Natl Lab, Natl Isotope Resource, Biosci Div, Grp B3, Los Alamos, NM 87545 USA.
Los Alamos Natl Lab, McClintock Resource, Los Alamos, NM 87545 USA.
RP Mariappan, SVS (reprint author), Univ Iowa, Dept Chem, 181 Chem Bldg, Iowa City, IA 52242 USA.
EM santhana-velupillai@uiowa.edu
FU NCCIH NIH HHS [P50 AT00155]
NR 37
TC 10
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 0003-2697
J9 ANAL BIOCHEM
JI Anal. Biochem.
PD NOV 15
PY 2004
VL 334
IS 2
BP 216
EP 226
DI 10.1016/j.ab.2004.07.036
PG 11
WC Biochemical Research Methods; Biochemistry & Molecular Biology;
Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA 866ZK
UT WOS:000224811700002
PM 15494127
ER
PT J
AU Banasiewicz, M
Nelson, G
Swank, A
Grubor, N
Ross, J
Nesnow, S
Kofeler, H
Small, GJ
Jankowiak, R
AF Banasiewicz, M
Nelson, G
Swank, A
Grubor, N
Ross, J
Nesnow, S
Kofeler, H
Small, GJ
Jankowiak, R
TI Identification and quantitation of benzo[a]pyrene-derived DNA adducts
formed at low adduction level in mice lung tissue
SO ANALYTICAL BIOCHEMISTRY
LA English
DT Article
DE benzo[a]pyrene; benzo[a]pyrene diolepoxide; fluorescence line-narrowing
spectroscopy; DNA adducts
ID DIASTEREOMERIC BENZOPYRENE 7,8-DIOL-9,10-EPOXIDES; AROMATIC
HYDROCARBON CARCINOGENESIS; POLYACRYLAMIDE-GEL ELECTROPHORESIS; RAS
ONCOGENE MUTATIONS; DIOL-EPOXIDE; OPTICAL ENANTIOMERS; MAMMALIAN-CELLS;
METABOLIC-ACTIVATION; CHEMICAL CARCINOGENS; MARKED DIFFERENCES
AB The two major metabolic pathways of benzo[a]pyrene (BP) that lead to DNA lesions are monooxygenation that results in diolepoxides (BPDE) and one-electron oxidation that yields a BP radical cation. These pathways result in formation of stable and depurinating DNA adducts, respectively. Most in vivo animal studies with BP, however, have employed dosage/DNA adduct levels several orders of magnitude higher than the DNA damage level expected from environmentally relevant exposures. Presented are results of experiments in which A/J strain mice were intraperitoneally exposed to 50-mug/g doses of BP. It is shown that non-line-narrowed fluorescence and fluorescence line-narrowing spectroscopies possess the selectivity and sensitivity to distinguish between helix-external, base-stacked, and intercalated conformations of DNA-BPDE adducts formed in lung tissue. Concentrations measured by P-32 post- labeling 2 and 3 days after intraperitoneal injection were 420-430 and 600-830 amol BPDE-type adducts per mug DNA. The external and base-stacked conformations are attributed mainly to (+)-trans-anti-BPDE-N(2)dG and the intercalated conformations to (+)-cis-anti adducts. A stable adduct derived from 9-OH-BP-4,5-epoxide was also detected at a concentration about a factor of 10 lower than the above concentrations. The DNA supernatants were analyzed for the presence of depurinating BP-derived adducts by capillary electrophoresis laser-induced fluorescence and high-performance liquid chromatography mass spectrometry. (C) 2004 Elsevier Inc. All rights reserved.
C1 Iowa State Univ, Ames Lab, USDOE, Ames, IA 50011 USA.
Iowa State Univ, Dept Chem, Ames, IA 50011 USA.
US EPA, Div Environm Carcinogenesis, Res Triangle Pk, NC 27711 USA.
Washington Univ, Dept Chem, St Louis, MO 63130 USA.
RP Jankowiak, R (reprint author), Iowa State Univ, Ames Lab, USDOE, Ames, IA 50011 USA.
EM jankowiak@ameslab.gov
RI Ross, Jeffrey/E-4782-2010
OI Ross, Jeffrey/0000-0002-7002-4548
FU NCI NIH HHS [2PO1 CA49210-12]
NR 62
TC 9
Z9 10
U1 0
U2 2
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0003-2697
J9 ANAL BIOCHEM
JI Anal. Biochem.
PD NOV 15
PY 2004
VL 334
IS 2
BP 390
EP 400
DI 10.1016/j.ab.2004.08.006
PG 11
WC Biochemical Research Methods; Biochemistry & Molecular Biology;
Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA 866ZK
UT WOS:000224811700022
PM 15494147
ER
PT J
AU Keener, WK
Watwood, ME
AF Keener, WK
Watwood, ME
TI Chloride analysis using 3,3',5,5'-tetramethylbenzidine and
chloroperoxidase
SO ANALYTICAL BIOCHEMISTRY
LA English
DT Editorial Material
ID CATALYZED REACTIONS; OXIDATION; ENZYME
C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA.
No Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86011 USA.
RP Keener, WK (reprint author), Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA.
EM keenwk@inel.gov
NR 13
TC 1
Z9 1
U1 0
U2 2
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0003-2697
J9 ANAL BIOCHEM
JI Anal. Biochem.
PD NOV 15
PY 2004
VL 334
IS 2
BP 406
EP 408
DI 10.1016/j.ab.2004.08.027
PG 3
WC Biochemical Research Methods; Biochemistry & Molecular Biology;
Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA 866ZK
UT WOS:000224811700025
PM 15494150
ER
PT J
AU Ji, Q
Ji, L
Chen, Y
Leung, KN
AF Ji, Q
Ji, L
Chen, Y
Leung, KN
TI Combined electron- and ion-beam imprinter and its applications
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID BRIGHTNESS
AB A combined electron- and ion-beam system employing a double-chamber plasma source and a single accelerator column has been developed to provide focused electron and positive-ion beams simultaneously, with no need for a separate electron source or accelerating column for sample neutralization. The self-aligned ion and electron beams can be used to micromachine and image a variety of materials, both conducting and insulating. Together with an ion-beam imprinting scheme, the combined electron/ion beam system is compact and provides low-cost, high-throughput, and large-area micromachining. (C) 2004 American Institute of Physics.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
Harvard Univ, Ctr Imaging & Mesoscale Struct, Cambridge, MA 02138 USA.
Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA.
RP Ji, Q (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
EM qji@lbl.gov
NR 10
TC 8
Z9 8
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD NOV 15
PY 2004
VL 85
IS 20
BP 4618
EP 4620
DI 10.1063/1.1812367
PG 3
WC Physics, Applied
SC Physics
GA 871WD
UT WOS:000225166400020
ER
PT J
AU Choo, H
Seo, D
Beddoes, J
Bourke, MAM
Brown, DW
AF Choo, H
Seo, D
Beddoes, J
Bourke, MAM
Brown, DW
TI In situ neutron diffraction studies on the elevated-temperature
deformation behavior of a TiAl-W alloy
SO APPLIED PHYSICS LETTERS
LA English
DT Article
AB The evolution of elastic lattice strain in a Ti-48Al-2W (at.%) alloy, subjected to (1) quasistatic tensile loading and (2) constant-load tensile creep, was investigated at 1033 K using in situ neutron diffraction. During the quasistatic test to a maximum stress of 435 MPa, a- and c-axes lattice strains increased linearly with a small degree of anisotropy ((E) over bar (a)/(E) over bar (c)congruent to0.9) up to 200 MPa, followed by a significant redistribution of load above 260 MPa due to the plastic anisotropy. Time-resolved in situ measurements were also performed during the creep at 276 and 327 MPa. The results show that lattice strain evolution during the primary creep is qualitatively similar to the quasistatic case under the current test conditions. (C) 2004 American Institute of Physics.
C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA.
Natl Res Council Canada, Inst Aerosp Res, Ottawa, ON, Canada.
Carleton Univ, Dept Mech & Aerosp Engn, Ottawa, ON K1S 5B6, Canada.
Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
RP Choo, H (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
EM hchoo@utk.edu
RI Choo, Hahn/A-5494-2009
OI Choo, Hahn/0000-0002-8006-8907
NR 9
TC 11
Z9 11
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 NOV 15
PY 2004
VL 85
IS 20
BP 4654
EP 4656
DI 10.1063/1.1823043
PG 3
WC Physics, Applied
SC Physics
GA 871WD
UT WOS:000225166400032
ER
PT J
AU Kang, BS
Lee, JS
Stan, L
Lee, JK
DePaula, RF
Arendt, PN
Nastasi, M
Jia, QX
AF Kang, BS
Lee, JS
Stan, L
Lee, JK
DePaula, RF
Arendt, PN
Nastasi, M
Jia, QX
TI Dielectric properties of epitaxial Ba0.6Sr0.4TiO3 films on SiO2/Si using
biaxially oriented ion-beam-assisted-deposited MgO as templates
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID YTTRIA-STABILIZED-ZIRCONIA; THIN-FILMS; LAYERS
AB We have epitaxially deposited Ba0.6Sr0.4TiO3 (BST) thin films on SiO2/Si substrates using pulsed laser deposition by introducing biaxially oriented ion-beam-assisted-deposited MgO as templates. The structural properties of the BST films were strongly affected by the crystallinity of the templates. The dielectric loss of the BST film was found to decrease as its in-plane texture alignment was improved. As a result, a relatively larger figure of merit K value, defined as tunability/loss, was obtained for the films with better in-plane crystallinity. The K factor ranged between 7.5 and 3.5 when the in-plane alignment of the MgO templates was varied from 5.0degrees to 10.5degrees. This work demonstrates that the crystalline quality of the template layers plays a critical role in monolithic integration of BST with SiO2/Si for frequency agile devices. (C) 2004 American Institute of Physics.
C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
RP Kang, BS (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
EM bskang@lanl.gov; qxjia@lanl.gov
RI Lee, Jang-Sik/A-6629-2008; Jia, Q. X./C-5194-2008
OI Lee, Jang-Sik/0000-0002-1096-1783;
NR 17
TC 13
Z9 14
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 NOV 15
PY 2004
VL 85
IS 20
BP 4702
EP 4704
DI 10.1063/1.1812573
PG 3
WC Physics, Applied
SC Physics
GA 871WD
UT WOS:000225166400048
ER
PT J
AU Pekas, N
Porter, MD
Tondra, M
Popple, A
Jander, A
AF Pekas, N
Porter, MD
Tondra, M
Popple, A
Jander, A
TI Giant magnetoresistance monitoring of magnetic picodroplets in an
integrated microfluidic system
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID SENSORS; DESIGN
AB This letter describes the integration of giant magnetoresistance (GMR) sensors with a microfluidic system for the velocity and size monitoring, and enumeration of flowing magnetic entities. We have fabricated a microdevice that enables: (1) controlled formation of picoliter-sized droplets of a ferrofluid separated by a nonmagnetic oil; and (2) continuous-flow sensing of these ferrofluid droplets. It is shown that the flow velocity, droplet size, and droplet-formation frequency can readily be determined from the GMR response. These results are validated by comparisons to fluorescence microscopy data. (C) 2004 American Institute of Physics.
C1 Iowa State Univ, Inst Combinatorial Discovery, Dept Chem, Ames, IA 50011 USA.
Iowa State Univ, Inst Combinatorial Discovery, Dept Chem Engn, Ames, IA 50011 USA.
Iowa State Univ, Ames Lab, USDOE, Ames, IA 50011 USA.
NVE Corp, Eden Prairie, MN 55433 USA.
RP Porter, MD (reprint author), Iowa State Univ, Inst Combinatorial Discovery, Dept Chem, Ames, IA 50011 USA.
EM mporter@porter1.ameslab.gov
RI Pekas, Nikola/D-7349-2012
NR 14
TC 37
Z9 38
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD NOV 15
PY 2004
VL 85
IS 20
BP 4783
EP 4785
DI 10.1063/1.1825059
PG 3
WC Physics, Applied
SC Physics
GA 871WD
UT WOS:000225166400075
ER
PT J
AU Noy, A
AF Noy, A
TI Direct determination of the equilibrium unbinding potential profile for
a short DNA duplex from force spectroscopy data
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID MOLECULES; ELASTICITY; PROTEIN
AB Modern force microscopy techniques allow researchers to use mechanical forces to probe interactions between biomolecules. However, such measurements often happen in nonequilibrium regime, which precludes straightforward extraction of the equilibrium energy information. Here we use the work-averaging method based on Jarzynski equality to reconstruct the equilibrium interaction potential from the unbinding of a complementary 14-mer DNA duplex from the results of nonequilibrium single-molecule measurements. The reconstructed potential reproduces most of the features of the DNA stretching transition, previously observed only in equilibrium stretching of long DNA sequences. We also compare the reconstructed potential with the thermodynamic parameters of DNA duplex unbinding and show that the reconstruction accurately predicts duplex melting enthalpy. (C) 2004 American Institute of Physics.
C1 Lawrence Livermore Natl Lab, Biosecur & Nanosci Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA.
RP Noy, A (reprint author), Lawrence Livermore Natl Lab, Biosecur & Nanosci Lab, Chem & Mat Sci Directorate, L-234,7000 East Ave, Livermore, CA 94550 USA.
EM noy1@llnl.gov
NR 19
TC 5
Z9 5
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 NOV 15
PY 2004
VL 85
IS 20
BP 4792
EP 4794
DI 10.1063/1.1819982
PG 3
WC Physics, Applied
SC Physics
GA 871WD
UT WOS:000225166400078
ER
PT J
AU Chu, X
Ohmoto, H
Cole, DR
AF Chu, X
Ohmoto, H
Cole, DR
TI Kinetics of sulfur isotope exchange between aqueous sulfide and
thiosulfate involving intra- and intermolecular reactions at
hydrothermal conditions
SO CHEMICAL GEOLOGY
LA English
DT Article
DE isotope exchange; sulfur isotopes; fractionation; kinetics; hydrothermal
systems
ID ELEVATED-TEMPERATURES; POLYSULFIDE IONS; BLUE SOLUTIONS; ORE-DEPOSITS;
SYSTEMS; OXYGEN; WATER; RATES; DISPROPORTIONATION; FRACTIONATIONS
AB Sulfur isotope exchange between sulfide (H2S) and thiosulfate (HSSO3H) can be described by the general rate law for a two-compound system (X and AB) with three exchangeable atoms (X, A, and B) proposed by [X. Chu, H. Ohmoto, Kinetics of isotope exchange reactions involving intra- and intermolecular reactions: I. Rate law for a system with two chemical compounds and three exchangeable atoms. Geochim. Cosmochim. Acta 55 1991 1953-1961]. According to the rate law, the isotope exchange reaction is comprised of one overall intramolecular exchange between sulfane (-SH or SH) and sulfonate (-SO3H or SO3H) sulfurs of thiosulfate (i.e., SHdouble left right arrowSO(3)H in thiosulfate) and two overall intermolecular exchanges between sulfide and sulfane sulfur of thiosulfate (i.e., H(2)Sdouble left right arrowSH of thiosulfate) and between sulfide and sulfonate sulfur of thiosulfate (i.e., H(2)Sdouble left right arrowSO(3)H of thiosulfate). The rate constants for the three overall exchange reactions and the equilibrium isotopic fractionation factors among sulfide, sulfane, and sulfonate of thiosulfate were estimated by fitting [F. Uyama, H. Chiba, M. Kusakabe, H. Sakai, Sulfur isotope exchange reaction in the aqueous system: thiosulfatesulfide-sulfate at hydrothermal temperature. Geochem. J. 19 1985 301-315] experimental data on sulfur isotope exchange between aqueous H2S and sodium thiosulfate by the least squares method. At temperatures of 100-170 degreesC, the equilibrium fractionation factors (in per mil) can be expressed as:
10001nalpha(H2S-SH) = -0.32.7 +/- 0.055 (10(12)/T-4) + 2.676 +/- 0.341 (10(6)/T-2)
10001nalpha(SO3H-SH)= -0.352 +/- 0.009(10(12)/T-4) + 7.523 +/- 0.054(10(6)/T-2)
and
10001nalpha(SO3H-SH)= -00293 +/- 0.058 (10(12)/T-4) - 4.871 +/- 0.357(10(6)/T-2)
(T in K). At near-neutral pH, the overall rate (m(-1) s(-1)) for the sulfur isotope exchange between H2S and -SO3H of thiosulfate is described by
logk(SO3Hdouble left right arrowH2S)= -5.14(10(3)/T) + 10.35
(T in K) with an activation energy of 98.3 kJ/mol at 100-170 degreesC.
A comparison of the rates of sulfur exchanges among H2S, -SH, and -SO3H of thiosulfate with the rates of polysulfide-thiosulfate formation and disproportion reactions determined by [W.F. Giggenbach, Kinetics of the polysulfide-thiosulfate disproportionation up to 240 degreesC. Inorg. Chem. 13 1974b 1730-1733] suggests that the sulfur isotope exchanges between aqueous sulfide and thiosulfate may proceed via the formation and disproportionation of polysulfides (e.g., S3S2-, S4S2-, etc.):
10H(2)S + 3S(2)O(3)(2-) = 4S(3)S(2-) + 2H(+) + 9H(2)O
and
SnS2- + SSO32- = Sn+1S2- + SO32-.
The disproportionation reaction of polysulfides appears to control the exchange rate between S2- and S6+ atoms in thiosulfate and is considered the rate-determining step in the sulfate-sulfide exchange reaction rather than the intramolecular exchange of thiosulfate proposed by [H. Ohmoto, A.C. Lasaga, Kinetics of reactions between aqueous sulfates and sulfides in hydrothermal systems. Geochim. Cosmochim. Acta 46 1982 1727-1745]. Therefore, polysulfides may play an important role in the chemical and isotopic reactions between aqueous sulfide and sulfate under hydrothermal conditions. (C) 2004 Elsevier B.V. All rights reserved.
C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Cole, DR (reprint author), Oak Ridge Natl Lab, Div Chem Sci, POB 2008, Oak Ridge, TN 37831 USA.
EM coledr@ornl.gov
NR 43
TC 12
Z9 14
U1 3
U2 22
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2541
J9 CHEM GEOL
JI Chem. Geol.
PD NOV 15
PY 2004
VL 211
IS 3-4
BP 217
EP 235
DI 10.1016/j.chemgeo.2004.06.013
PG 19
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 867YY
UT WOS:000224880200002
ER
PT J
AU Chacon, L
AF Chacon, L
TI A non-staggered, conservative, del center dot(B)over right arrow=0,
finite-volume scheme for 3D implicit extended magnetohydrodynamics in
curvilinear geometries
SO COMPUTER PHYSICS COMMUNICATIONS
LA English
DT Article
DE implicit MHD; Newton-Krylov solvers; finite volumes; non-staggered
solenoidal schemes; conservative schemes; curvilinear geometries
ID MAGNETO-HYDRODYNAMIC EQUATIONS; SOLVER; SIMULATIONS; ALGORITHM; FLOWS
AB In the development of spatial difference schemes for magnetohydrodynamics (MHD), the preservation of continuum proper ties such as conservation of mass, momentum, and energy, as well as required electromagnetic constraints (del (.) b = del (.) j = 0, where j = del x B is the electrical current), is desirable to preserve numerical accuracy. Moreover, simplicity of the scheme is also a desirable feature, particularly when an implicit implementation is considered (the focus of this paper). We propose here a finite-volume, cell-centered (non-staggered) scheme for the extended MHD formulation that: (1) is suitable for implicit implementations in arbitrary curvilinear geometries, (2) is conservative, (3) preserves both the magnetic field and the electrical current solenoidal to machine precision, and (4) is linearly and nonlinearly stable in the absence of numerical and physical dissipation. Crucial to the viability of the scheme is the use of a clever interpolation scheme (ZIP [Hirt, J. Comput. Phys. 2 (1968) 339-355]), the proper treatment of boundary conditions in curvilinear geometry, and a novel treatment of geometric source terms in the momentum equation that ensures their exact cancellation in the absence of pressure forces. (C) 2004, Elsevier B.V. All rights reserved.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Chacon, L (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM chacon@lanl.gov
NR 30
TC 29
Z9 29
U1 0
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 NOV 15
PY 2004
VL 163
IS 3
BP 143
EP 171
DI 10.1016/j.cpc.2004.08.005
PG 29
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 872CC
UT WOS:000225182500002
ER
PT J
AU Trehu, AM
Torres, ME
Long, PE
Bohrmann, G
Rack, FR
Collett, TS
Goldberg, DS
Milkov, AV
Riedel, M
Schultheiss, P
Bangs, NL
Barr, SR
Borowski, WS
Claypool, GE
Delwiche, ME
Dickens, GR
Gracia, E
Guerin, G
Holland, M
Johnson, JE
Lee, YJ
Liu, CS
Su, X
Teichert, B
Tomaru, H
Vanneste, M
Watanabe, M
Weinberger, JL
AF Trehu, AM
Torres, ME
Long, PE
Bohrmann, G
Rack, FR
Collett, TS
Goldberg, DS
Milkov, AV
Riedel, M
Schultheiss, P
Bangs, NL
Barr, SR
Borowski, WS
Claypool, GE
Delwiche, ME
Dickens, GR
Gracia, E
Guerin, G
Holland, M
Johnson, JE
Lee, YJ
Liu, CS
Su, X
Teichert, B
Tomaru, H
Vanneste, M
Watanabe, M
Weinberger, JL
TI Three-dimensional distribution of gas hydrate beneath southern Hydrate
Ridge: constraints from ODP Leg 204 (vol 222, pg 845, 2004)
SO EARTH AND PLANETARY SCIENCE LETTERS
LA English
DT Correction
C1 Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA.
Pacific NW Natl Lab, Richland, WA 99352 USA.
Univ Bremen, Dept Geosci, D-28359 Bremen, Germany.
JOI, Washington, DC 20036 USA.
US Geol Survey, Denver Fed Ctr, Denver, CO 80225 USA.
Columbia Univ, Lamont Doherty Geol Observ, Borehole Res Grp, Palisades, NY 10964 USA.
Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA.
Geol Survey Canada, Pacific Geosci Ctr, Sidney, BC V8L 4B2, Canada.
GEOTEK, Daventry NN11 5RD, Northants, England.
Univ Texas, Inst Geophys, Austin, TX 78759 USA.
Univ Leicester, Dept Geol, Leicester LE1 7RH, Leics, England.
Eastern Kentucky Univ, Dept Earth Sci, Richmond, KY 40475 USA.
Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA.
Rice Univ, Dept Earth Sci, Houston, TX USA.
Ctr Mediterrani Invest Marines & Ambientals, Unidad Tecnol Marina, Barcelona 08003, Spain.
Arizona State Univ, Dept Geol Sci, Tempe, AZ 85287 USA.
Korea Inst Geosci & Mineral Resources, Petr & Marine Resources Res Div, Taejon 305350, South Korea.
Natl Taiwan Univ, Inst Oceanog, Taipei 106, Taiwan.
China Univ Geosci, Ctr Marine Geol, Beijing, Peoples R China.
Univ Bremen, Forschungszentrum Ozeanrander, D-28334 Bremen, Germany.
Univ Tokyo, Dept Earth & Planetary Sci, Tokyo 1130033, Japan.
Univ Tromso, Dept Geol, N-9037 Tromso, Norway.
Geol Survey Japan, Geosci Inst, Tsukuba, Ibaraki 3058567, Japan.
Univ Calif San Diego, Scripps Inst Oceanog, San Diego, CA 92093 USA.
RP Trehu, AM (reprint author), Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA.
EM trehu@coas.oregonstate.edu
RI Bangs, Nathan/A-1584-2009; Dickens, Gerald/G-1222-2011; Gracia,
Eulalia/E-6153-2013
OI Bangs, Nathan/0000-0002-4377-3463; Gracia, Eulalia/0000-0001-9311-3108
NR 1
TC 4
Z9 4
U1 1
U2 14
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 NOV 15
PY 2004
VL 227
IS 3-4
BP 557
EP 558
DI 10.1016/j.epsl.2004.09.016
PG 2
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 871IS
UT WOS:000225124900029
ER
PT J
AU van Oijen, M
Dreccer, MF
Firsching, KH
Schnieders, B
AF van Oijen, M
Dreccer, MF
Firsching, KH
Schnieders, B
TI Simple equations for dynamic models of the effects of CO2 and O-3 on
light-use efficiency and growth of crops
SO ECOLOGICAL MODELLING
LA English
DT Review
DE Triticum aestivum; wheat; detoxification; damage; repair; rubisco;
photosynthesis; light intensity; temperature
ID TRITICUM-AESTIVUM L; OPEN-TOP CHAMBERS; RADIATION USE EFFICIENCY;
PHASEOLUS-VULGARIS L; SPRING WHEAT; ELEVATED CO2; CARBON-DIOXIDE;
AIR-POLLUTANTS; PLANT-RESPONSES; LEAF NITROGEN
AB Atmospheric concentrations of CO2 and O-3 are increasing, which is expected to affect light-use efficiency (LUE) and yield of crops. We derive a mathematical formula for crop LUE as a function of CO2, temperature, light intensity and the Rubisco content of upper leaves. A corollary formula is derived that expresses the sensitivity of crop growth rate to changes in Rubisco, under various conditions. Both formulas were incorporated in an existing wheat model, together with new equations that represent the effects Of O-3. Five parameters were defined that quantify O-3 relations: (1) the amount of Rubisco damaged per unit O-3, (2, 3) rate and metabolic Costs of O-3 detoxification, (4, 5) rate and costs of repair. For quantification of the damage coefficient and repair rate, equations were developed that can be applied to gas exchange measurements in plants subjected to stepwise increase in ambient ozone concentration. The model was parameterised for spring wheat using literature data. Model simulations were carried out for various time courses of O-3, CO2, temperature, light intensity, to explain reports in the literature on variation in crop response to elevated CO2 and O-3 under different climatic conditions. In spite of model simplicity, simulations explained much of reported variation in crop response to elevated levels of CO2 and O-3. The need and use of additional experimentation is discussed, as is the scope for analysing plant defence strategies in terms of investment in detoxification and repair. (C) 2004 Elsevier B.V. All rights reserved.
C1 CEH Edinburgh, Penicuik EH26 0QB, Midlothian, Scotland.
Dept Primary Ind Horsham, Horsham, Vic 3401, Australia.
GSF Forschungszentrum, D-85758 Oberschleissheim, Germany.
TEAGASC, Agr & Food Dev Author, Oak Pk Res Ctr, Carlow, Ireland.
RP van Oijen, M (reprint author), CEH Edinburgh, Bush Estate, Penicuik EH26 0QB, Midlothian, Scotland.
EM mvano@ceh.ac.uk
RI Van Oijen, Marcel/K-2746-2012; Dreccer, Maria/F-2150-2010
OI Van Oijen, Marcel/0000-0003-4028-3626; Dreccer,
Maria/0000-0003-3528-9580
NR 88
TC 12
Z9 15
U1 2
U2 20
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3800
J9 ECOL MODEL
JI Ecol. Model.
PD NOV 15
PY 2004
VL 179
IS 1
BP 39
EP 60
DI 10.1016/j.ecolmodel.2004.05.002
PG 22
WC Ecology
SC Environmental Sciences & Ecology
GA 848GH
UT WOS:000223455100003
ER
PT J
AU Gustin, MS
Ericksen, JA
Schorran, DE
Johnson, DW
Lindberg, SE
Coleman, JS
AF Gustin, MS
Ericksen, JA
Schorran, DE
Johnson, DW
Lindberg, SE
Coleman, JS
TI Application of controlled mesocosms for understanding mercury
air-soil-plant exchange
SO ENVIRONMENTAL SCIENCE & TECHNOLOGY
LA English
DT Article
ID ATMOSPHERIC MERCURY; CONTAMINATED SOILS; FOLIAR EXCHANGE; FOREST CANOPY;
PEAT SOIL; EMISSION; SORPTION; METHYLMERCURY; DEPOSITION; FLUXES
AB Whole system elemental mercury (Hg(0)) flux was measured for similar to1.5 years using two large gas exchange mesocosms containing similar to100 two-year old aspen trees (Populus tremuloides) planted in soil with elevated mercury concentrations (12.3 mug/g). We hypothesized that during leafout, whole mesocosm Hg(0) flux would increase due to movement of Hg(0) in the transpiration stream from the soil to the air. This hypothesis was not supported; plants were found to assimilate Hg(0) from the contaminated air, and whole system Hg(0) emissions were reduced as plants leafed-out due to shading of the soil. Surface disturbance, watering, and increases in soil moisture, light, and temperature were all found to increase whole system Hg(0) flux, with light being a more significant factor. Although surface soils were maintained at 15-20% moisture, daily watering caused pulses of Hg(0) to be released from the soil throughout the experiment. Data developed in this experiment suggested that those processes acting on the soil surface are the primary influence on Hg emissions and that the presence of vegetation, which shields soil surfaces from incident light, reduces Hg emissions from enriched soils.
C1 Univ Nevada, Dept Nat Resources & Environm Sci, Reno, NV 89557 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
Desert Res Inst, Reno, NV 89512 USA.
RP Gustin, MS (reprint author), Univ Nevada, Dept Nat Resources & Environm Sci, Reno, NV 89557 USA.
EM msg@unr.nevada.edu
NR 33
TC 37
Z9 42
U1 8
U2 29
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 NOV 15
PY 2004
VL 38
IS 22
BP 6044
EP 6050
DI 10.1021/es0487933
PG 7
WC Engineering, Environmental; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA 873IC
UT WOS:000225272100031
PM 15573605
ER
PT J
AU Wan, JM
Tokunaga, TK
Saiz, E
Larsen, JT
Zheng, ZP
Couture, RA
AF Wan, JM
Tokunaga, TK
Saiz, E
Larsen, JT
Zheng, ZP
Couture, RA
TI Colloid formation at waste plume fronts
SO ENVIRONMENTAL SCIENCE & TECHNOLOGY
LA English
DT Article
ID HANFORD SITE; SUBSURFACE SEDIMENTS; MOBILIZATION; TRANSPORT; ALKALINE;
SORPTION; CESIUM; CS+; USA
AB Highly saline and caustic tank waste solutions containing radionuclides and toxic metals have leaked into sediments at U.S. Department of Energy (DOE) facilities such as the Hanford Site (Washington state). Colloid transport is frequently invoked to explain migration of radionuclides and metals in the subsurface. To understand colloid formation during interactions between highly reactive fluids and sediments and its impact on contaminant transport, we simulated tank waste solution (TWS) leakage processes in laboratory columns at ambient and elevated (70 degreesC) temperatures. We found that maximum formation of mobile colloids occurred at the plume fronts (hundreds to thousands times higher than within the plume bodies or during later leaching). Concentrations of suspended solids were as high as 3 mass %, and their particle sizes ranged from tens of nanometers to a few micrometers. Calcium carbonate is always one of the dominant phases of the plume front colloids, while the other phases varied with solution pH and temperature. During infiltration of the leaked high-Na+ waste solution, rapid and completed Na+ replacement of exchangeable Ca2+ and Mg2+ from the sediment caused accumulation of these divalent cations at the moving plume front. Precipitation of supersaturated Ca2+/Mg2+-bearing minerals caused dramatic pH reduction at the plume front. In turn, the reduced pH caused precipitation of other minerals. This understanding can help predict the behavior of contaminant trace elements carried by the tank waste solutions and could not have been obtained through conventional batch studies.
C1 Lawrence Berkeley Natl Lab, Earth Sci & Mat Sci Div, Berkeley, CA 94720 USA.
Washington Univ, Dept Earth & Planetary Sci, St Louis, MO 63130 USA.
RP Wan, JM (reprint author), Lawrence Berkeley Natl Lab, Earth Sci & Mat Sci Div, Berkeley, CA 94720 USA.
EM jwan@lbl.gov
RI Tokunaga, Tetsu/H-2790-2014; Wan, Jiamin/H-6656-2014
OI Tokunaga, Tetsu/0000-0003-0861-6128;
NR 27
TC 17
Z9 17
U1 1
U2 14
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 NOV 15
PY 2004
VL 38
IS 22
BP 6066
EP 6073
DI 10.1021/es0492384
PG 8
WC Engineering, Environmental; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA 873IC
UT WOS:000225272100034
PM 15573608
ER
PT J
AU Yoon, TH
Johnson, SB
Musgrave, CB
Brown, GE
AF Yoon, TH
Johnson, SB
Musgrave, CB
Brown, GE
TI Adsorption of organic matter at mineral/water interfaces: I. ATR-FTIR
spectroscopic and quantum chemical study of oxalate adsorbed at
boehmite/water and corundum/water interfaces
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID GAMMA-ALOOH INTERFACE; BENZENECARBOXYLATE SURFACE COMPLEXATION; GOETHITE
(ALPHA-FEOOH)/WATER INTERFACE; ALPHA-AL2O3 0001 SURFACE; COORDINATION
CHEMISTRY; INFRARED-SPECTROSCOPY; AQUEOUS-SOLUTIONS; CARBOXYLIC-ACIDS;
O-PHTHALATE; WATER
AB The types and structures of adsorption complexes formed by oxalate at boehmite (gamma-AlOOH)/water and corundum (alpha-Al2O3)/water interfaces were determined using in situ attenuated total reflectance fourier transform infrared (ATR-FTIR) spectroscopy and quantum chemical simulation methods. At pH 5.1, at least four different oxalate species were found at or near the boehmite/water interface for oxalate surface coverages (Gamma(ox)) ranging from 0.25 to 16.44 mumol/m(2). At relatively low coverages (Gamma(ox) < 2.47), strongly adsorbed inner-sphere oxalate species (IR peaks at 1286, 1418, 1700, and 1720 cm(-1)) replace weakly adsorbed carbonate species, and a small proportion of oxalate anions are adsorbed in an outer-sphere mode (IR peaks at 1314 and 1591 cm(-1)). IR peaks indicative of inner-sphere adsorbed oxalate are also observed for oxalate at the corundum/water interface at Gamma(ox) = 1.4 mumol/m(2). With increasing oxalate concentration (Gamma(ox) > 2.47 mumol/m(2)), the boehmite surface binding sites for inner-sphere adsorbed oxalate become saturated, and excess oxalate ions are present dominantly as aqueous species (IR peaks at 1309 and 1571 cm(-1)). In addition to these adsorption processes, oxalate-promoted dissolution of boehmite following inner-sphere oxalate adsorption becomes increasingly pronounced with increasing Gamma(ox) and results in an aqueous Al(III)-oxalate species, as indicated by shifted IR peaks (1286 --> 1297 cm(-1) and 1418 --> 1408 cm(-1)). At pH 2.5, no outer-sphere adsorbed oxalate or aqueous oxalate species were observed. The similarity of adsorbed oxalate spectral features at pH 2.5 and 5.1 implies that the adsorption mechanism of aqueous HOx(-) species involves loss of protons from this species during the ligand-exchange reaction. As a consequence, adsorbed inner-sphere oxalate and aqueous Al(III)-oxalate complexes formed at pH 2.5 have coordination geometries very similar to those formed at pH 5.1.
The coordination geometry of inner-sphere adsorbed oxalate species was also predicted using quantum chemical geometry optimization and IR vibrational frequency calculations. Geometry-optimized Al8O12 and Al14O22 clusters with the reactive surface Al site coordinated by three oxygens were used as model substrates for corundum and boehmite surfaces. Among the models considered, calculated IR frequencies based on a bidentate side-on structure with a 5-membered ring agree best with the observed frequencies for boehmite/oxalate/water samples at Gamma(ox) = 0.25 to 16.44 mumol/m(2) and pH 2.5 and 5.1, and for a corundum/oxalate/water sample at Gamma(ox) = 1.4 mumol/m(2) and pH 5.1. Based on these results, we suggest that oxalate bonding on boehmite and corundum surfaces results in 5-coordinated rather than 4- or 6-coordinated Al surface sites. Copyright (C) 2004 Elsevier Ltd
C1 Stanford Univ, Surface & Aqueous Geochem Grp, Dept Geol & Environm Sci, Stanford, CA 94305 USA.
Stanford Univ, Dept Chem Engn, Stanford, CA 94305 USA.
Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA.
SLAC, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
RP Yoon, TH (reprint author), Stanford Univ, Surface & Aqueous Geochem Grp, Dept Geol & Environm Sci, Stanford, CA 94305 USA.
EM taeyoon@pangea.stanford.edu
NR 53
TC 80
Z9 82
U1 9
U2 64
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 NOV 15
PY 2004
VL 68
IS 22
BP 4505
EP 4518
DI 10.1016/j.gca.2004.04.025
PG 14
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 869JU
UT WOS:000224980000001
ER
PT J
AU Liu, CX
Zachara, JM
Qafoku, O
McKinley, JP
Heald, SM
Wang, ZM
AF Liu, CX
Zachara, JM
Qafoku, O
McKinley, JP
Heald, SM
Wang, ZM
TI Dissolution of uranyl microprecipitates in subsurface sediments at
Hanford site, USA
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID GIBBS FREE-ENERGIES; NUCLEAR-FUEL; URANIUM(VI) ADSORPTION; CARBONATE
SOLUTIONS; OXIDATIVE DISSOLUTION; SORPTION COMPLEXES; AQUEOUS-SOLUTIONS;
HUMIC-ACID; HEMATITE; MINERALS
AB The dissolution of uranium was investigated from contaminated sediments obtained at the US. Department of Energy (U.S. DOE) Hanford site. The uranium existed in the sediments as uranyl silicate microprecipitates in fractures, cleavages, and cavities within sediment grains. Uranium dissolution was studied in Na, Na-Ca, and NH4 electrolytes with pH ranging from 7.0 to 9.5 under ambient CO, pressure. The rate and extent of uranium dissolution was influenced by uranyl mineral solubility, carbonate concentration, and mass transfer rate from intraparticle regions. Dissolved uranium concentration reached constant values within a month in electrolytes below pH 8.2, whereas concentrations continued to rise for over 200 d at pH 9.0 and above. The steady-state concentrations were consistent with the solubility of Na-boltwoodite and/or uranophane, which exhibit similar solubility under the experimental conditions. The uranium dissolution rate increased with increasing carbonate concentration, and was initially fast. It decreased with time as solubility equilibrium was attained, or dissolution kinetics or mass transfer rate from intraparticle regions became rate-limiting. Microscopic observations indicated that uranium precipitates were distributed in intragrain microfractures with variable sizes and connectivity to particle surfaces. Laser-induced fluorescence spectroscopic change of the uranyl microprecipitates was negligible during the long-term equilibration, indicating that uranyl speciation was not changed by dissolution. A kinetic model that incorporated mineral dissolution kinetics and grain-scale, fracture-matrix diffusion was developed to describe uranium release rate from the sediment. Model calculations indicated that 50-95% of the precipitated uranium was associated with fractures that were in close contact with the aqueous phase. The remainder of the uranium was deeply imbedded in particle interiors and exhibited effective diffusivities that were over three orders of magnitude lower than those in the fractures. Copyright (C) 2004 Elsevier Ltd.
C1 Pacific NW Natl Lab, Richland, WA 99352 USA.
Argonne Natl Lab, PNC, CAT, Argonne, IL 60439 USA.
RP Liu, CX (reprint author), Pacific NW Natl Lab, POB 999,MSIN K8-96, Richland, WA 99352 USA.
EM Chongxuan.liu@pnl.gov
RI Liu, Chongxuan/C-5580-2009; Wang, Zheming/E-8244-2010
OI Wang, Zheming/0000-0002-1986-4357
NR 57
TC 76
Z9 78
U1 1
U2 20
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 NOV 15
PY 2004
VL 68
IS 22
BP 4519
EP 4537
DI 10.1016/j.gca.2004.04.017
PG 19
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 869JU
UT WOS:000224980000002
ER
PT J
AU Maher, K
DePaolo, DJ
Lin, JCF
AF Maher, K
DePaolo, DJ
Lin, JCF
TI Rates of silicate dissolution in deep-sea sediment: In situ measurement
using U-234/U-238 of pore fluids
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Review
ID CHEMICAL-WEATHERING RATES; ALPHA-RECOIL DAMAGE; SOLUTION SATURATION
STATE; SR ISOTOPIC EVOLUTION; RIVER PLAIN AQUIFER; TH-SERIES NUCLIDES;
SURFACE-AREA; MARINE-SEDIMENTS; U-SERIES; PREFERENTIAL SOLUTION
AB Bulk dissolution rates for sediment from ODP Site 984A in the North Atlantic are determined using the U-234/U-238 activity ratios of pore water, bulk sediment, and leachates. Site 984A is one of only several sites where closely spaced pore water samples were obtained from the upper 60 meters of the core; the sedimentation rate is high (11-15 cm/ka), hence the sediments in the upper 60 meters are less than 500 ka old. The sediment is clayey silt and composed mostly of detritus derived from Iceland with a significant component of biogenic carbonate (up to 30%).
The pore water U-234/U-238 activity ratios are higher than seawater values, in the range of 1.2 to 1.6, while the bulk sediment U-234/U-238 activity ratios are close to 1.0. The U-234/U-238 of the pore water reflects a balance between the mineral dissolution rate and the supply rate of excess U-234 to the pore fluid by a-recoil injection of Th-234. The fraction of U-238 decays that result in a-recoil injection of U-234 to pore fluid is estimated to be 0.10 to 0.20 based on the U-234/U-238 of insoluble residue fractions. The calculated bulk dissolution rates, in units of g/g/yr are in the range of 4 X 10(-7) to 2 X 10(-6) yr(-1). There is significant down-hole variability in pore water U-234/U-238 activity ratios (and hence dissolution rates) on a scale of ca. 10 m. The inferred bulk dissolution rate constants are 100 to 10(4) times slower than laboratory-determined rates, 100 times faster than rates inferred for older sediments based on Sr isotopes, and similar to weathering rates determined for terrestrial soils of similar age. The results of this study suggest that U isotopes can be used to measure in situ dissolution rates in fine-grained clastic materials.
The rate estimates for sediments from ODP Site 984 confirm the strong dependence of reactivity on the age of the solid material: the bulk dissolution rate (R-d) of soils and deep-sea sediments can be approximately described by the expression R-d approximate to 0.1 Age(-1) for ages spanning 1000 to 5 X 10(8) yr. The age of the material, which encompasses the grain size, surface area, and other chemical factors that contribute to the rate of dissolution, appears to be a much stronger determinant of dissolution rate than any single physical or chemical property of the system. Copyright (C) 2004 Elsevier Ltd.
C1 Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
EO Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Maher, K (reprint author), Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
EM katem@eps.berkeley.edu
RI Maher, Kate/B-3489-2010
OI Maher, Kate/0000-0002-5982-6064
NR 124
TC 70
Z9 70
U1 2
U2 24
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 NOV 15
PY 2004
VL 68
IS 22
BP 4629
EP 4648
DI 10.1016/j.gca.2004.04.024
PG 20
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 869JU
UT WOS:000224980000009
ER
PT J
AU Elso, CM
Lu, XC
Culiat, CT
Rutledge, JC
Cacheiro, NLA
Generoso, WM
Stubbs, LJ
AF Elso, CM
Lu, XC
Culiat, CT
Rutledge, JC
Cacheiro, NLA
Generoso, WM
Stubbs, LJ
TI Heightened susceptibility to chronic gastritis, hyperplasia and
metaplasia in Kcnq1 mutant mice
SO HUMAN MOLECULAR GENETICS
LA English
DT Article
ID HELICOBACTER-PYLORI INFECTION; POTASSIUM CHANNEL GENE; MOUSE MODEL;
TARGETED DISRUPTION; LANGE-NIELSEN; CARDIOAUDITORY SYNDROME;
MOLECULAR-BASIS; PARIETAL-CELLS; BETA-SUBUNIT; CANCER
AB Increased susceptibility to gastric cancer has been associated with a wide range of host genetic and environmental factors, including Helicobacter pylori infection. Helicobacter pylori infection is postulated to initiate a progression through atrophic gastritis, metaplasia and dysplasia to cancer, and has been associated with reduction of acid output and dysregulation of stomach mucins. Here, we present the characterization of two mouse lines carrying mutant alleles of the gene encoding the Kcnq1 potassium channel, which very rapidly establish chronic gastritis in a pathogen-exposed environment. These mice develop gastric hyperplasia, hypochlorhydria and mucin dysregulation independent of infection. Metaplasia, dysplasia and pre-malignant adenomatous hyperplasia of the stomach have been observed in these Kcnq1 mutant mice, also independent of infection. The data presented here suggest that Kcnq1 mutant mice can be used both as an efficient model for the development of atrophic gastritis after infection and to determine the processes during the later stages of progression to gastric cancer independent of infection. Thus, Kcnq1 mutant mice are a powerful new tool for investigating the connection between acid balance, Helicobacter infection and mucin disruption in the progression to gastric cancer.
C1 Lawrence Livermore Natl Lab, Genome Biol Div, Livermore, CA 94550 USA.
Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831 USA.
Childrens Hosp, Dept Lab Med, Seattle, WA 98105 USA.
RP Stubbs, LJ (reprint author), Lawrence Livermore Natl Lab, Genome Biol Div, Livermore, CA 94550 USA.
EM stubbs5@llnl.gov
OI Stubbs, Lisa/0000-0002-9556-1972
NR 38
TC 30
Z9 31
U1 0
U2 1
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0964-6906
J9 HUM MOL GENET
JI Hum. Mol. Genet.
PD NOV 15
PY 2004
VL 13
IS 22
BP 2813
EP 2821
DI 10.1093/hmg/ddh307
PG 9
WC Biochemistry & Molecular Biology; Genetics & Heredity
SC Biochemistry & Molecular Biology; Genetics & Heredity
GA 873BG
UT WOS:000225253100008
PM 15385447
ER
PT J
AU Cooper, GJT
Abbas, H
Kogerler, P
Long, DL
Cronin, L
AF Cooper, GJT
Abbas, H
Kogerler, P
Long, DL
Cronin, L
TI Pentadecadentate chelating ligands as building blocks for a {Fe-6} cage
with 12 exo-coordinated sodium cations
SO INORGANIC CHEMISTRY
LA English
DT Article
ID POLYAMINOPOLYCARBOXYLIC ACIDS; COMPLEXES; CHEMISTRY; IONS
AB Complexation of the highly branched, pentadecadentate chelating ligand cis, cis-1,3,5-cyclohexanetriamine-N, N, N', N', W, N'-hexaacetic acid (H6L) with iron(III) and sodium cations in the presence of carbonate anions leads to the formation of an {Fe6L2} cluster comprising an {Fe-6} cage linked by 12 exo-coordinated sodium cations to form an extended 3D array.
C1 Univ Glasgow, Dept Chem, Glasgow G12 8QQ, Lanark, Scotland.
Iowa State Univ, Dept Phys & Astron, Ames, IA 50010 USA.
Iowa State Univ, Ames Lab, Ames, IA 50010 USA.
RP Cronin, L (reprint author), Univ Glasgow, Dept Chem, Glasgow G12 8QQ, Lanark, Scotland.
EM L.Cronin@chem.gla.ac.uk
RI Cronin, Leroy/B-7752-2008; Long, Deliang/C-3500-2011; Kogerler,
Paul/H-5866-2013
OI Cronin, Leroy/0000-0001-8035-5757; Kogerler, Paul/0000-0001-7831-3953
NR 24
TC 8
Z9 8
U1 0
U2 3
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 NOV 15
PY 2004
VL 43
IS 23
BP 7266
EP 7268
DI 10.1021/ic049068w
PG 3
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 871JY
UT WOS:000225128900003
PM 15530071
ER
PT J
AU Bhattacharya, RN
Contreras, MA
Teeter, G
AF Bhattacharya, RN
Contreras, MA
Teeter, G
TI 18.5% copper indium gallium diselenide (CIGS) device using single-layer,
chemical-bath-deposited ZnS(O,OH)
SO JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS
LA English
DT Article
DE copper indium gallium diselenide (CIGS); chemical bath deposition (CBD);
ZnS(O,OH)
AB The recent development of a chemical-bath-deposited (CBD) ZnS(O,OH) layer that enabled an 18.5%-efficient copper indium gallium diselenide (CIGS) devices using a single-layer of CBD ZnS(O,OH) is reported in this paper. Such buffer layers could potentially replace US in the CIGS solar cell.
C1 NREL, Golden, CO 80401 USA.
RP Bhattacharya, RN (reprint author), NREL, 1617 Cole Blvd, Golden, CO 80401 USA.
NR 2
TC 70
Z9 73
U1 1
U2 35
PU INST PURE APPLIED PHYSICS
PI TOKYO
PA TOYOKAIJI BLDG NO. 12, 6-9-6 SHINBASHI, MINATO-KU, TOKYO, 105, JAPAN
SN 0021-4922
J9 JPN J APPL PHYS 2
JI Jpn. J. Appl. Phys. Part 2 - Lett. Express Lett.
PD NOV 15
PY 2004
VL 43
IS 11B
BP L1475
EP L1476
DI 10.1143/JJAP.43.L1475
PG 2
WC Physics, Applied
SC Physics
GA 877PE
UT WOS:000225581700006
ER
PT J
AU Barvosa-Carter, W
Aziz, MJ
Phan, AV
Kaplan, T
Gray, LJ
AF Barvosa-Carter, W
Aziz, MJ
Phan, AV
Kaplan, T
Gray, LJ
TI Interfacial roughening during solid phase epitaxy: Interaction of
dopant, stress, and anisotropy effects
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID BOUNDARY CONTOUR METHOD; NONHYDROSTATIC STRESS; GROWTH INSTABILITY;
AMORPHOUS SI; KINETICS; CRYSTALLIZATION; ORIENTATION; DEPENDENCE;
GENERATION; LAYERS
AB The effects of externally applied stress and rate-enhancing dopants on interfacial roughness during the solid phase epitaxial growth of ion-implantation-doped Si are investigated using cross-sectional transmission electron microscopy and time-resolved reflectivity. We find long-wavelength roughness in the absence of an applied stress that arises solely from the dopant-gradient. With the addition of a compressive stress, the interface roughens further with an enhanced magnitude and a dramatically reduced wavelength. We discuss the experimental results in the context of a simulation that includes our current understanding of stress, dopant-gradient, and interface anisotropy effects. We find a rich interplay between these effects in determining growth morphology evolution, and demonstrate the successes and current limitations of the model. (C) 2004 American Institute of Physics.
C1 Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA.
Univ S Alabama, Dept Mech Engn, Mobile, AL 36688 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA.
RP Barvosa-Carter, W (reprint author), HRL Labs, Malibu, CA USA.
EM wbc@hrl.com; maziz@harvard.edu
NR 26
TC 24
Z9 24
U1 3
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD NOV 15
PY 2004
VL 96
IS 10
BP 5462
EP 5468
DI 10.1063/1.1790580
PG 7
WC Physics, Applied
SC Physics
GA 868PR
UT WOS:000224926000010
ER
PT J
AU Millett, JCF
Bourne, NK
Gray, GT
AF Millett, JCF
Bourne, NK
Gray, GT
TI The equation of state of a fluorinated tripolymer
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID SHOCK COMPRESSION; POLYTETRAFLUOROETHYLENE; EXPLOSIVES; TRANSITION;
ELASTOMER; POLYMERS; BEHAVIOR; WAVE
AB The Hugoniot of the fluorinated tripolymer Viton B has been quantified in terms of shock stress, shock velocity, and particle velocity. The shock velocity-particle velocity curve was found to be linear, thus suggesting no changes in phase occurred in the experimental stress range investigated. Comparisons of the calculated hydrodynamic pressures and measured stresses also showed close agreement, with only small differences apparent at the highest stresses. It is believed that this shows Viton B has a low shock-induced shear strength that only becomes significant at high impact stresses. Comparison of the Hugoniots of Viton B, polytetrafluroethylene, and polyvinylidene difluoride shows that the former is slightly steeper. The authors suggest that this is due to the -CF3 side group having a strengthening effect. (C) 2004 American Institute of Physics.
C1 Cranfield Univ, Royal Mil Coll Sci, Swindon SN6 8LA, Wilts, England.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Cranfield Univ, Royal Mil Coll Sci, Swindon SN6 8LA, Wilts, England.
EM j.c.f.millett@cranfield.ac.uk
RI Bourne, Neil/A-7544-2008
NR 22
TC 7
Z9 7
U1 0
U2 6
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 NOV 15
PY 2004
VL 96
IS 10
BP 5500
EP 5504
DI 10.1063/1.1805193
PG 5
WC Physics, Applied
SC Physics
GA 868PR
UT WOS:000224926000016
ER
PT J
AU Hayes, DB
Hall, CA
Asay, JR
Knudson, MD
AF Hayes, DB
Hall, CA
Asay, JR
Knudson, MD
TI Measurement of the compression isentrope for 6061-T6 aluminum to 185 GPa
and 46% volumetric strain using pulsed magnetic loading
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID Z-ACCELERATOR; SHOCK-WAVE; SAPPHIRE; INTERFEROMETER; VELOCITIES; SOLIDS;
INDEX; STATE
AB The Z accelerator at Sandia National Laboratories was used to measure the compression isentrope of 6061-T6 aluminum to 185 GPa. The isentropic compression experimental technique uses a rapidly increasing, planar magnetic field to simultaneously subject multiple planar aluminum samples of different thicknesses to a ramped magnetic stress load. This magnetic stress load causes a ramped compression wave to propagate in the aluminum. Motion histories at the rear surface of each aluminum sample are measured through a LiF window using laser velocity interferometry. Backward and forward integration of the one-dimensional equations of motion are used to analyze the data. Imposing the requirement that each motion history comes from the same magnetic stress load is sufficient to determine both the stress load and the stress-strain behavior of the aluminum. Because of shocks that grow in the LiF, the usual VISAR interferometer analysis was modified. The measured compression curve obtained on different aluminum samples for volumetric strains to 46% agrees to within about 2% of peak stress with an isentrope obtained from the often-used Mie-Gruneisen equation of state that was derived from previous Hugoniot data. (C) 2004 American Institute of Physics.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 31
TC 39
Z9 43
U1 1
U2 5
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 NOV 15
PY 2004
VL 96
IS 10
BP 5520
EP 5527
DI 10.1063/1.1803108
PG 8
WC Physics, Applied
SC Physics
GA 868PR
UT WOS:000224926000019
ER
PT J
AU Saraf, L
Shutthanandan, V
Zhang, Y
Thevuthasan, S
Wang, CM
El-Azab, A
Baer, DR
AF Saraf, L
Shutthanandan, V
Zhang, Y
Thevuthasan, S
Wang, CM
El-Azab, A
Baer, DR
TI Distinguishibility of oxygen desorption from the surface region with
mobility dominant effects in nanocrystalline ceria films
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID CARBON-MONOXIDE; FUEL-CELL; OXIDE; OXIDATION; CEO2; DIFFUSION;
REDUCTION; ZIRCONIA; ION; NANOPARTICLES
AB We present an investigation of oxygen (O-18) uptake measurements in 1 mum thick nanocrystalline ceria films grown on single crystal Al2O3(0001) by nuclear reaction analysis (NRA). Oxygen uptake measurements were carried out in the temperature range of 200-600degreesC at a background O-18 pressure of 4.0x10(-6) Torr. Average grain size in the as-grown films, synthesized by sol-gel process was similar to3 nm confirmed by high-resolution transmission electron microscopy and x-ray diffraction measurements. From the diffusion depth profiles, changes in intensity and slopes in surface and interface regions indicate complex oxygen mobility effects. Oxygen desorption is clearly distinguishable in the film surface region as a result of shift in the oxygen concentration maxima. It is argued that high defect density in nanocrystalline ceria which is associated with nanograin surface combined with intermediate temperature reducing environment triggers multiple processes such as molecular and ionic diffusion, adsorption, desorption, and isotope exchange interactions. The promising nature of NRA is realized as an effective tool to acquire the depth-dependent information from complex reactions existing in nanocrystalline environment. (C) 2004 American Institute of Physics.
C1 Pacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, Richland, WA 99352 USA.
Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA.
RP Saraf, L (reprint author), Pacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, Richland, WA 99352 USA.
EM Laxmikant.Saraf@pnl.gov
RI Baer, Donald/J-6191-2013; Albe, Karsten/F-1139-2011
OI Baer, Donald/0000-0003-0875-5961;
NR 38
TC 6
Z9 6
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD NOV 15
PY 2004
VL 96
IS 10
BP 5756
EP 5760
DI 10.1063/1.1803605
PG 5
WC Physics, Applied
SC Physics
GA 868PR
UT WOS:000224926000058
ER
PT J
AU Hau-Riege, CS
Hau-Riege, SP
Marathe, AP
AF Hau-Riege, CS
Hau-Riege, SP
Marathe, AP
TI The effect of interlevel dielectric on the critical tensile stress to
void nucleation for the reliability of Cu interconnects
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID DAMASCENE INTERCONNECTS; ELECTROMIGRATION; CU/OXIDE
AB We have conducted electromigration experiments and modeling on Cu Damascene structures surrounded by different interlevel dielectric ILD and Cu-cap materials. We have determined the mechanical properties of the surrounding ILD and Cu cap to play a key role in the critical stress change to void nucleation (Deltasigma(crit)), which is one of the critical parameters in determining electromigration lifetime or any other void-limited lifetime. Specifically, we found that Deltasigma(crit) decreases as the Young's modulus of the interlevel dielectric decreases, which is the case with low-k materials. In order to compensate for the lower threshold to void nucleation in low-k materials, a stronger emphasis needs to be placed on the quality or adhesion of the Cu/cap interface, which is currently the preferred site for void nucleation, so that interconnects fabricated in low-k materials continue to meet the ever-increasing electromigration reliability requirements. Finally, the methodology developed in this study, which is based on experiment and modeling, can be used to determine Deltasigma(crit), and therefore the critical jL product, for any combination of ILD and Cu-cap materials. (C) 2004 American Institute of Physics.
C1 Adv Micro Devices Inc, Sunnyvale, CA 94086 USA.
Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Hau-Riege, CS (reprint author), Adv Micro Devices Inc, 1 AMD Pl,M-S 143, Sunnyvale, CA 94086 USA.
NR 18
TC 37
Z9 37
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 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD NOV 15
PY 2004
VL 96
IS 10
BP 5792
EP 5796
DI 10.1063/1.1787139
PG 5
WC Physics, Applied
SC Physics
GA 868PR
UT WOS:000224926000065
ER
PT J
AU Subotnik, JE
Shao, YH
Liang, WZ
Head-Gordon, M
AF Subotnik, JE
Shao, YH
Liang, WZ
Head-Gordon, M
TI An efficient method for calculating maxima of homogeneous functions of
orthogonal matrices: Applications to localized occupied orbitals
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID ELECTROPHILIC AROMATIC NITRATION; MOLECULAR-ORBITALS; WANNIER FUNCTIONS;
CONVERGENCE ACCELERATION; NITROSATION; ALGORITHMS
AB We present here three new algorithms (one purely iterative and two DIIS-like [Direct Inversion in the Iteractive Subspace]) to compute maxima of homogeneous functions of orthogonal matrices. These algorithms revolve around the mathematical lemma that, given an invertible matrix A, the function f(U)=Tr(AU) has exactly one local (and global) maximum for U special orthogonal [i.e., UUT=1 and det(U)=1]. This is proved in the Appendix. One application of these algorithms is the computation of localized orbitals, including, for example, Boys and Edmiston-Ruedenberg (ER) orbitals. The Boys orbitals are defined as the set of orthonormal orbitals which, for a given vector space of orbitals, maximize the sum of the distances between orbital centers. The ER orbitals maximize total self-interaction energy. The algorithm presented here computes Boys orbitals roughly as fast as the traditional method (Jacobi sweeps), while, for large systems, it finds ER orbitals potentially much more quickly than traditional Jacobi sweeps. In fact, the required time for convergence of our algorithm scales quadratically in the region of a few hundred basis functions (though cubicly asymptotically), while Jacobi sweeps for the ER orbitals traditionally scale as the number of occupied orbitals to the fifth power. As an example of the utility of the method, we provide below the ER orbitals of nitrated and nitrosated benzene, and we discuss the chemical implications. (C) 2004 American Institute of Physics.
C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
Univ Sci & Technol China, Lab Bond Select Chem, Anhua 230026, Peoples R China.
RP Subotnik, JE (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
RI Liang, Wanzhen /F-6879-2010
NR 25
TC 43
Z9 43
U1 1
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD NOV 15
PY 2004
VL 121
IS 19
BP 9220
EP 9229
DI 10.1063/1.1790971
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 868DT
UT WOS:000224895000003
PM 15538842
ER
PT J
AU Kenny, JP
Benson, SJ
Alexeev, Y
Sarich, J
Janssen, CL
McInnes, LC
Krishnan, M
Nieplocha, J
Jurrus, E
Fahlstrom, C
Windus, TL
AF Kenny, JP
Benson, SJ
Alexeev, Y
Sarich, J
Janssen, CL
McInnes, LC
Krishnan, M
Nieplocha, J
Jurrus, E
Fahlstrom, C
Windus, TL
TI Component-based integration of chemistry and optimization software
SO JOURNAL OF COMPUTATIONAL CHEMISTRY
LA English
DT Article
DE electronic structure; component; software development; optimization
ID MOLECULAR-ORBITAL METHODS; BASIS SETS
AB Typical scientific software designs make rigid assumptions regarding programming language and data structures, frustrating software interoperability and scientific collaboration. Component-based software engineering is an emerging approach to managing the increasing complexity of scientific software. Component technology facilitates code interoperability and reuse. Through the adoption of methodology and tools developed by the Common Component Architecture Forum, we have developed a component architecture for molecular structure optimization. Using the NWChem and Massively Parallel Quantum Chemistry packages, we have produced chemistry components that provide capacity city for energy and energy derivative evaluation. We have constructed geometry optimization applications by integrating the Toolkit for Advanced Optimization, Portable Extensible Toolkit for Scientific Computation, and Global Arrays packages, which provide optimization and linear algebra capabilities. We present a brief overview of the component development process and a description of abstract interfaces for chemical optimizations. The components conforming to these abstract interfaces allow the construction of applications using different chemistry and mathematics packages interchangeably. Initial numerical results for the component software demonstrate good performance, and highlight potential research enabled by this platform. (C) 2004 Wiley Periodicals, Inc.
C1 Sandia Natl Labs, High Performance Comp & Networking Dept, Livermore, CA 94551 USA.
Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA.
Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA.
RP Kenny, JP (reprint author), Sandia Natl Labs, High Performance Comp & Networking Dept, MS 9915,POB 969, Livermore, CA 94551 USA.
EM jpkenny@sandia.gov
NR 38
TC 18
Z9 18
U1 0
U2 1
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0192-8651
J9 J COMPUT CHEM
JI J. Comput. Chem.
PD NOV 15
PY 2004
VL 25
IS 14
BP 1717
EP 1725
DI 10.1002/jcc.20091
PG 9
WC Chemistry, Multidisciplinary
SC Chemistry
GA 856SP
UT WOS:000224065500004
PM 15362128
ER
PT J
AU Rothenberger, KS
Cugini, AV
Howard, BH
Killmeyer, RP
Ciocco, MV
Morreale, BD
Enick, RM
Bustamante, F
Mardilovich, IP
Ma, YH
AF Rothenberger, KS
Cugini, AV
Howard, BH
Killmeyer, RP
Ciocco, MV
Morreale, BD
Enick, RM
Bustamante, F
Mardilovich, IP
Ma, YH
TI High pressure hydrogen permeance of porous stainless steel coated with a
thin palladium film via electroless plating
SO JOURNAL OF MEMBRANE SCIENCE
LA English
DT Article
DE composite membranes; gas separations; membrane preparation and
structure; hydrogen; permeability testing
ID CHEMICAL-VAPOR-DEPOSITION; GAS SHIFT REACTION; COMPOSITE MEMBRANES;
PD-AG; SEPARATION; REACTOR; PERMEATION; METHANE; PERMEABILITY;
SELECTIVITY
AB The high-pressure (100-2800 kPa) hydrogen permeance of two membranes, each composed of a thin palladium film (similar to22 mum) deposited on the oxidized surface of a porous stainless steel tubular substrate (0.2 mum grade support) has been determined over the 623-723 K temperature range. The hydrogen flux was proportional to the H-2 partial pressure in the retentate raised to an exponent of similar to0.55 for one membrane and similar to0.64 for the other, indicating that the transport of hydrogen through the composite membrane was primarily limited by bulk diffusion. Overall, the hydrogen permeance of these membranes was within a wide range of values previously reported with thin film palladium membranes of comparable thickness. The first membrane exhibited no detectable helium flux at hydrogen partial pressures less than 350 kPa for a retentate stream composed of 90% hydrogen and 10% helium. H-2/He selectivity decreased to values as low as 12, however, at total transmembrane pressure differentials as great as 2800 kPa. As the membranes were heated from 623 to 723 K under pressures of up to 2800 kPa, the permeance of each membrane remained invariant at values of similar to1.5 x 10(-4) and similar to2.9 x 10(-4) mol/(m(2) s Pa-0.5), then decreased by similar to35% when the membrane was cooled back to 623 K, indicating some degradation of the membranes under the high-pressure testing conditions. Scanning electron microscopy (SEM) analysis revealed that extremes in the palladium film thickness ranged from about 10-50 mum with palladium "fingers" extending into the pore structure anchoring the palladium layer to the support. Although surface characterization could not pinpoint the source of the degradation, intermetallic, diffusion could not be ruled out in spite of the presence of the oxide layer. (C) 2004 Elsevier B.V. All rights reserved.
C1 US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
NETL Support Contractor Parsons, S Pk, PA 15129 USA.
Univ Pittsburgh, NETL Res Associate, Chem & Petr Engn Dept, Pittsburgh, PA 15261 USA.
Worcester Polytech Inst, Dept Chem Engn, Worcester, MA 01609 USA.
RP Rothenberger, KS (reprint author), US DOE, Natl Energy Technol Lab, POB 10940, Pittsburgh, PA 15236 USA.
EM kurt.rothenberger@netl.doe.gov
NR 39
TC 96
Z9 97
U1 1
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0376-7388
J9 J MEMBRANE SCI
JI J. Membr. Sci.
PD NOV 15
PY 2004
VL 244
IS 1-2
BP 55
EP 68
DI 10.1016/j.memsci.2004.06.036
PG 14
WC Engineering, Chemical; Polymer Science
SC Engineering; Polymer Science
GA 872TU
UT WOS:000225232300006
ER
PT J
AU Wang, H
Brady, MP
More, KL
Meyer, HM
Turner, JA
AF Wang, H
Brady, MP
More, KL
Meyer, HM
Turner, JA
TI Thermally nitrided stainless steels for polymer electrolyte membrane
fuel cell bipolar plates - Part 2: Beneficial modification of passive
layer on AISI446
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE nitridation; stainless steel; ferrite; PEMFC; bipolar plate
ID NITRIDATION
AB Thermal nitridation of AISI446 mod-1 superferritic stainless steel for 24 h at 1100degreesC resulted in an adherent, inward growing surface layer based on (Cr, Fe)(2)N1-x (x = 0-0.5). The layer was not continuous, and although it resulted in low interfacial contact resistance (ICR) and good corrosion resistance under simulated polymer electrolyte membrane fuel cell (PEMFC) cathodic conditions; poor corrosion resistance was observed under simulated anodic conditions. Nitridation for 2 h at 1100degreesC resulted in little nitrogen uptake and a tinted surface. Analysis by SEM, XPS, and AES suggested a complex heterogeneous modification of the native passive oxide film by nitrogen rather than the desired microns-thick exclusive Cr-rich nitride layer. Surprisingly, this modification resulted in both good corrosion resistance under simulated cathodic and anodic conditions and low ICR, well over an order of magnitude lower than the untreated alloy. Further, little increase in ICR was observed under passivating polarization conditions. The potential of this phenomenon for PEMFC bipolar plates is discussed. (C) 2004 Elsevier B.V. All rights reserved.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM john_turner@nrel.gov
RI Brady, Michael/A-8122-2008; More, Karren/A-8097-2016
OI Brady, Michael/0000-0003-1338-4747; More, Karren/0000-0001-5223-9097
NR 8
TC 95
Z9 99
U1 2
U2 12
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-7753
EI 1873-2755
J9 J POWER SOURCES
JI J. Power Sources
PD NOV 15
PY 2004
VL 138
IS 1-2
BP 79
EP 85
DI 10.1016/j.jpowsour.2004.06.064
PG 7
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 871SV
UT WOS:000225154600010
ER
PT J
AU Wang, H
Brady, MP
Teeter, G
Turner, JA
AF Wang, H
Brady, MP
Teeter, G
Turner, JA
TI Thermally nitrided stainless steels for polymer electrolyte membrane
fuel cell bipolar plates - Part 1: Model Ni-50Cr and austenitic 349 (TM)
alloys
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE thermal nitridation; Ni-based alloy; stainless steel; PEMFC; bipolar
plate; corrosion
ID NITRIDATION
AB Thermal nitridation of a model Ni-50Cr alloy at 1100degreesC for 2 h in pure nitrogen resulted in the formation of a continuous, protective CrN/Cr2N surface layer with a low interfacial contact resistance. Application of similar nitridation parameters to an austenitic stainless steel, 349(TM), however, resulted in a discontinuous mixture of discrete CrN, Cr2N and (Cr,Fe)(2)N1-x (x = 0-0.5) phase surface particles overlying an exposed gamma austenite-based matrix, rather than a continuous nitride surface layer. The interfacial contact resistance of the 349(TM) was reduced significantly by the nitridation treatment. However, in the simulated PEMFC environments (1 M H2SO4 + 2 ppm F- solutions at 70degreesC sparged with either hydrogen or air), very high corrosion currents were observed under both anodic and cathodic conditions. This poor behavior was linked to the lack of continuity of the Cr-rich nitride surface formed on 349(TM). Issues regarding achieving continuous, protective Cr-nitride surface layers on stainless steel alloys are discussed. (C) 2004 Elsevier B.V. All rights reserved.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM john_turner@nrel.gov
RI Brady, Michael/A-8122-2008
OI Brady, Michael/0000-0003-1338-4747
NR 15
TC 107
Z9 113
U1 1
U2 12
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-7753
EI 1873-2755
J9 J POWER SOURCES
JI J. Power Sources
PD NOV 15
PY 2004
VL 138
IS 1-2
BP 86
EP 93
DI 10.1016/j.jpowsour.2004.06.067
PG 8
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 871SV
UT WOS:000225154600011
ER
PT J
AU Morris, RS
Dixon, BG
Gennett, T
Raffaelle, R
Heben, MJ
AF Morris, RS
Dixon, BG
Gennett, T
Raffaelle, R
Heben, MJ
TI High-energy, rechargeable Li-ion battery based on carbon nanotube
technology
SO JOURNAL OF POWER SOURCES
LA English
DT Article; Proceedings Paper
CT 41st Power Sources Conference
CY JUN 14-17, 2004
CL Philadelphia, PA
DE nanotube; lithium battery; carbon
AB In the near future, the portable power market will demand greater specific energy and power from lithium battery technology. These requirements cannot be met by conventional batteries or through extrapolation of the capabilities of conventional systems. New materials and systems must be developed to meet these stringent future requirements.
Nanomaterials offer a new exciting alternative to the standard materials traditionally used for fabrication of batteries. The work described herein, deals with a novel approach to the use of nanomaterials in the electrodes of lithium-ion batteries. We have synthesized and chemically modified carbon nanotubes and subsequently tested these modified nanotubes as electrodes in small lithium batteries. This paper describes electrochemical characterization of the novel electrodes as well as determination of the specific energy of simple one-cell batteries containing these novel electrodes. We have been able to demonstrate a laboratory cell with a specific exceeding 600 Wh/kg and pulse power exceeding 3 kW/kg. (C) 2004 Elsevier B.V. All rights reserved.
C1 Phoenix Innovat Inc, Wareham, MA 02576 USA.
Rochester Inst Technol, NanoPower Res Lab, Rochester, NY 14623 USA.
Natl Renewable Energy Lab, Golden, CO USA.
RP Dixon, BG (reprint author), Phoenix Innovat Inc, 20 Patterson Brook Rd, Wareham, MA 02576 USA.
EM bdixon@phoenixinnov.com
NR 10
TC 83
Z9 88
U1 5
U2 21
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 NOV 15
PY 2004
VL 138
IS 1-2
BP 277
EP 280
DI 10.1016/j.jpowsour.2004.06.014
PG 4
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 871SV
UT WOS:000225154600035
ER
PT J
AU Singh, P
Guidotti, RA
Reisner, D
AF Singh, P
Guidotti, RA
Reisner, D
TI ac impedance measurements of molten salt thermal batteries
SO JOURNAL OF POWER SOURCES
LA English
DT Article
DE thermal batteries; Li-based molten salt batteries; electrochemical
impedance spectroscopy
AB Non-destructive testing of thermal batteries without activating them is a challenging proposition. Molten salt thermal batteries are activated by raising their temperature to above the melting point of the salt constituting the electrolyte. One approach that we have considered is to raise the temperature of the molten salt electrolyte to a temperature below the melting point so that the battery does not get activated yet may provide sufficient mobility of the ionic species to be able to obtain some useful ac impedance measurements. This hypothesis was put to the test for two Li(Si)/FeS2 molten salt batteries with two electrolytes of different melting points-a standard LiCl-KCl eutectic that melts at 352degreesC and a LiBr-KBr-LiCl eutectic with a melting point of 319 degreesC. ac impedance measurements as a function of frequency and temperature below the melting point are presented for single cells and batteries. (C) 2004 Elsevier B.V. All rights reserved.
C1 Villanova Univ, Dept Elect & Comp Engn, Villanova, PA 19085 USA.
Sandia Natl Labs, Albuquerque, NM 87185 USA.
US Nanocorp Inc, Farmington, CT 06032 USA.
RP Singh, P (reprint author), Villanova Univ, Dept Elect & Comp Engn, Villanova, PA 19085 USA.
EM singh@ece.vill.edu; dreisner@usnanocorp.com
NR 1
TC 9
Z9 11
U1 1
U2 19
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 NOV 15
PY 2004
VL 138
IS 1-2
BP 323
EP 326
DI 10.1016/j.jpowsour.2004.06.038
PG 4
WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials
Science, Multidisciplinary
SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science
GA 871SV
UT WOS:000225154600044
ER
PT J
AU Sarma, GB
Radhakrishnan, B
AF Sarma, GB
Radhakrishnan, B
TI Modeling microstructural effects on the evolution of cube texture during
hot deformation of aluminum
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE hot deformation; microstructure; cube texture; finite element modeling;
crystal plasticity; mesoscale simulations
ID PLANE-STRAIN COMPRESSION; ORIENTED FCC CRYSTALS; RECRYSTALLIZATION
TEXTURES; DEFORMED ALUMINUM; SINGLE-CRYSTALS; AL SINGLE; POLYCRYSTALS;
ORIENTATION; ALLOYS; TEMPERATURE
AB The origin and development of cube ({0 0 1} <1 0 0>) texture during hot deformation and subsequent recrystallization of aluminum alloys remains a topic of considerable interest in materials research. Finite element modeling at the mesoscale was used to study the hot deformation of microstructures containing cube-oriented grains distributed among grains with S ({1 2 3} <6 3 4>) and copper ({1 1 2} <1 1 1>) orientations. Discretization of each grain with a large number of elements enables the model to capture the heterogeneous deformation of individual grains. The constitutive response of the material is modeled using crystal plasticity, thereby enabling the prediction of texture evolution in the microstructure. The deformation at elevated temperatures has been modeled by including slip on the non-octahedral {1 1 0} <1 1 0> systems, in addition to the usual {1 1 1} <1 1 0> systems(.) Microstructures with different grain sizes and some special configurations for the cube grain have been deformed in plane strain compression. The effects of the local environment, grain size and plastic strain on the stability of the cube texture during hot deformation are examined. The inclination of the cube grain boundary relative to the compression axis appears to play a role in the distributions of stored energy and misorientation across the boundary. (C) 2004 Elsevier B.V. All rights reserved.
C1 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 37
TC 11
Z9 13
U1 0
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 NOV 15
PY 2004
VL 385
IS 1-2
BP 91
EP 104
DI 10.1016/j.msea.2004.06.007
PG 14
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 867DI
UT WOS:000224822000014
ER
PT J
AU Stolyarov, VV
Zhu, YT
Raab, GI
Zharikov, AI
Valiev, RZ
AF Stolyarov, VV
Zhu, YT
Raab, GI
Zharikov, AI
Valiev, RZ
TI Effect of initial microstructure on the microstructural evolution and
mechanical properties of Ti during cold rolling
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE microstructure; mechanical property; ECAP; cold rolling
ID SEVERE PLASTIC-DEFORMATION; GRAIN-REFINEMENT; PURE TI; TITANIUM; ECAP
AB Ultrafine-grained (UFG) Ti rods were produced via cold rolling UFG and coarse-grained (CG) Ti stocks. The initial UFG stock was produced via equal channel angular pressing. It was found that the initial UFG structure had beneficial influence on the mechanical properties of the cold-rolled Ti rods. Compared with Ti rods with initial CG microstructure, the Ti rods with the initial UFG microstructure have both higher strength and higher ductility after being cold rolled to varying strains. Transmission electron microscopy revealed that the Ti rods with the initial UFG microstructure had finer, more homogeneous microstructures after cold rolling. This study demonstrates the merit of UFG Ti processed by ECAP for further shaping and forming into structural components with superior mechanical properties. (C) 2004 Elsevier B.V. All rights reserved.
C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa 450000, Russia.
RP Zhu, YT (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, POB 1663, Los Alamos, NM 87545 USA.
EM yzhu@lanl.gov
RI Zhu, Yuntian/B-3021-2008; Raab, Georgy/G-7530-2013
OI Zhu, Yuntian/0000-0002-5961-7422;
NR 17
TC 28
Z9 32
U1 0
U2 8
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 NOV 15
PY 2004
VL 385
IS 1-2
BP 309
EP 313
DI 10.1016/j.msea.2004.06.054
PG 5
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA 867DI
UT WOS:000224822000039
ER
PT J
AU Burvenich, TJ
Madland, DG
Reinhard, PG
AF Burvenich, TJ
Madland, DG
Reinhard, PG
TI Adjustment studies in self-consistent relativistic mean-field models
SO NUCLEAR PHYSICS A
LA English
DT Article
DE relativistic mean-field model; contact interactions; adjustment;
fitting; nuclear matter; finite nuclei
ID CHIRAL-SYMMETRY; FINITE NUCLEI; QCD; LAGRANGIANS; DYNAMICS; FORCES
AB We investigate the influence of the adjustment procedure and the set of measured observables on the properties and predictive power of relativistic self-consistent mean-field models for the nuclear ground state. These studies are performed with the point-coupling variant of the relativistic meanfield model. We recommend optimal adjustment algorithms for the general two-part problem and we identify various trends and dependencies as well as deficiencies of current models. Consequences for model improvements are presented. (C) 2004 Elsevier B.V. All rights reserved.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
Univ Erlangen Nurnberg, Inst Theoret Phys 2, D-91058 Erlangen, Germany.
RP Burvenich, TJ (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM tbuerven@lanl.gov
NR 33
TC 17
Z9 17
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD NOV 15
PY 2004
VL 744
BP 92
EP 107
DI 10.1016/j.nuclphysa.2004.08.017
PG 16
WC Physics, Nuclear
SC Physics
GA 864LD
UT WOS:000224634100004
ER
PT J
AU Wang, P
Leinweber, DB
Thomas, AW
Williams, AG
AF Wang, P
Leinweber, DB
Thomas, AW
Williams, AG
TI New treatment of the chiral SU(3) quark mean field model
SO NUCLEAR PHYSICS A
LA English
DT Article
DE hadronic matter; finite nuclei; hypemuclei; effective mass; chiral
symmetry; quark mean field
ID MESON COUPLING MODEL; STRANGE HADRONIC MATTER; NUCLEAR-MATTER; FINITE
NUCLEI; LAMBDA-HYPERNUCLEI; BAG MODEL; PHASE-TRANSITION; BROKEN SCALE;
SYMMETRY; SIGMA
AB We perform a study of infinite hadronic matter, finite nuclei and hypernuclei with an improved method of calculating the effective baryon mass. A detailed study of the predictions of the model is made in comparison with the available data and the level of agreement is generally very good. Comparison with an earlier treatment shows relatively minor differences at or below normal nuclear matter density, while at high density the improved calculation is quite different. In particular, we find no phase transition corresponding to chiral symmetry restoration in high density nuclear matter. (C) 2004 Elsevier B.V. All rights reserved.
C1 Univ Adelaide, Special Res Ctr Subatom Struct Matter, CSSM, Adelaide, SA 5005, Australia.
Univ Adelaide, Dept Phys, Adelaide, SA 5005, Australia.
Jefferson Lab, Newport News, VA 23606 USA.
RP Univ Adelaide, Special Res Ctr Subatom Struct Matter, CSSM, Adelaide, SA 5005, Australia.
EM pwang@physics.adelaide.edu.au
RI Thomas, Anthony/G-4194-2012; Williams, Anthony/I-6698-2012; Leinweber,
Derek/J-6705-2013;
OI Thomas, Anthony/0000-0003-0026-499X; Leinweber,
Derek/0000-0002-4745-6027; Williams, Anthony/0000-0002-1472-1592
NR 58
TC 10
Z9 10
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
EI 1873-1554
J9 NUCL PHYS A
JI Nucl. Phys. A
PD NOV 15
PY 2004
VL 744
BP 273
EP 292
DI 10.1016/j.nuclphys.2004.08.015
PG 20
WC Physics, Nuclear
SC Physics
GA 864LD
UT WOS:000224634100012
ER
PT J
AU Xu, XM
Sun, Y
Chen, AQ
Zheng, L
AF Xu, XM
Sun, Y
Chen, AQ
Zheng, L
TI Triple-gluon scatterings and early thermalization
SO NUCLEAR PHYSICS A
LA English
DT Article
DE triple-gluon scatterings; transport equation; thermalization
ID HEAVY-ION COLLISIONS; ULTRARELATIVISTIC NUCLEAR COLLISIONS; PLUS AU
COLLISIONS; DUAL PARTON MODEL; ELLIPTIC FLOW; PARTICLE-PRODUCTION;
ENTROPY PRODUCTION; ROOT-S(NN)=130 GEV; TRANSPORT-THEORY; CASCADE MODELS
AB Triple-gluon scattering processes in gluon matter initially created in Au-Au collisions at RHIC energies become important. The three-gluon scatterings are calculated in perturbative QCD and give rise to a new term in a transport equation for gluon distribution. A numerical solution of the transport equation demonstrates gluon momentum isotropy achieved at a time of the order of 0.65 fm/c and can thus be fitted to a thermal distribution with fugacity of 0.065 and temperature of 0.75 GeV. Triple-gluon scatterings lead to a short thermalization time of gluon matter. (C) 2004 Elsevier B.V. All rights reserved.
C1 Shanghai Univ, Dept Phys, Shanghai 200436, Peoples R China.
Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
Chinese Acad Sci, Shanghai Inst Nucl Res, Div Nucl Phys, Shanghai 201800, Peoples R China.
Shanghai Univ, Dept Commun, Shanghai 200436, Peoples R China.
RP Shanghai Univ, Dept Phys, Shanghai 200436, Peoples R China.
EM xmxucao@sh.cnuninet.net
NR 89
TC 18
Z9 18
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
EI 1873-1554
J9 NUCL PHYS A
JI Nucl. Phys. A
PD NOV 15
PY 2004
VL 744
BP 347
EP 377
DI 10.1016/j.nuclphysa.2004.08.010
PG 31
WC Physics, Nuclear
SC Physics
GA 864LD
UT WOS:000224634100016
ER
PT J
AU Chekanov, S
Derrick, M
Loizides, JH
Magill, S
Miglioranzi, S
Musgrave, B
Repond, J
Yoshida, R
Mattingly, MCK
Pavel, N
Antonioli, P
Bari, G
Basile, M
Bellagamba, L
Boscherini, D
Bruni, A
Bruni, G
Romeo, GC
Cifarelli, L
Cindolo, F
Contin, A
Corradi, M
De Pasquale, S
Giusti, P
Iacobucci, G
Margotti, A
Montanari, A
Nania, R
Palmonari, E
Pesci, A
Rinaldi, L
Sartorelli, G
Zichichi, A
Aghuzumtsyan, G
Bartsch, D
Brock, I
Goers, S
Hartmann, H
Hilger, E
Irrgang, P
Jakob, HP
Kind, O
Meyer, U
Paul, E
Rautenberg, J
Renner, R
Stifutkin, A
Tandler, J
Voss, KC
Wang, M
Bailey, DS
Brook, NH
Cole, JE
Heath, GP
Namsoo, T
Robins, S
Wing, M
Capau, M
Mastroberardino, A
Schioppa, M
Susinno, G
Kim, JY
Lim, IT
Ma, KJ
Pac, MY
Helbich, M
Ning, Y
Ren, Z
Schmidke, WB
Sciulli, F
Chwastowski, J
Eskreys, A
Figiel, J
Galas, A
Olkiewicz, K
Stopa, P
Zawiejski, L
Adamczyk, L
Bold, T
Grabowska-Bold, I
Kisielewska, D
Kowal, AM
Kowal, M
Lukasik, J
Przybycien, M
Suszycki, L
Szuba, D
Szuba, J
Kotanski, A
Slominski, W
Adler, V
Behrens, U
Bloch, I
Borras, K
Chiochia, V
Dannheim, D
Drews, G
Fourletova, J
Fricke, U
Geiser, A
Gottlicher, P
Gutsche, O
Haas, T
Hain, W
Hillert, S
Horn, C
Kahle, B
Kotz, U
Kowalski, H
Kramberger, G
Labes, H
Lelas, D
Lim, H
Lohr, B
Mankel, R
Melzer-Pellmann, IA
Nguyen, CN
Notz, D
Nuncio-Quiroz, AE
Polini, A
Raval, A
Schneekloth, U
Stosslein, U
Wolf, G
Youngman, C
Zeuner, W
Schlenstedt, S
Barbagli, G
Gallo, E
Genta, C
Pelfer, PG
Bamberger, A
Benen, A
Karstens, F
Dobur, D
Vlasov, NN
Bussey, PJ
Doyle, AT
Ferrando, J
Hamilton, J
Hanlon, S
Saxon, DH
Skillicorn, IO
Gialas, I
Carli, T
Gosau, T
Holm, U
Krumnack, N
Lohrmann, E
Milite, M
Salehi, H
Schleper, P
Schorner-Sadenius, T
Stonjek, S
Wichmann, K
Wick, K
Ziegler, A
Ziegler, A
Collins-Toogh, C
Foudas, C
Goncalo, R
Long, KR
Tapper, AD
Cloth, P
Filges, D
Kataoka, M
Nagano, K
Tokushuku, K
Yamada, S
Yamazaki, Y
Barakbaev, AN
Boos, EG
Pokrovskiy, NS
Zhautykov, BO
Son, D
de Favereau, J
Piotrzkowski, K
Barreiro, F
Glasman, C
Gonzalez, O
Labarga, L
del Peso, J
Tassi, E
Terron, J
Zambrana, M
Barbi, M
Corriveau, F
Gliga, S
Lainesse, J
Padhi, S
Stairs, DG
Walsh, R
Tsurugai, T
Antonov, A
Danilov, P
Dolgoshein, BA
Gladkov, D
Sosnovtsev, V
Suchkov, S
Dementiev, RK
Ermolov, PF
Katkov, II
Khein, LA
Korzhavina, IA
Kuzmin, VA
Levchenko, BB
Lukina, OY
Proskuryakov, AS
Shcheglova, LM
Zotkin, SA
Abt, I
Buttner, C
Caldwell, A
Liu, X
Sutiak, J
Coppola, N
Grigorescu, G
Grijpink, S
Keramidas, A
Koffeman, E
Kooijman, P
Maddox, E
Pellegrino, A
Schagen , S
Tiecke, H
Vazquez, M
Wiggers, L
de Wolf, E
Brummer, N
Bylsma, B
Durkin, LS
Ling, TY
Cooper-Sarkar, AM
Cottrell, A
Devenish, RCE
Foster, B
Grzelak, G
Gwenlan, C
Kohno, T
Patel, S
Straub, PB
Walczak, R
Bellan, P
Bertolin, A
Brugnera, R
Carlin, R
Dal Corso, F
Dusini, S
Garfagnini, A
Limentani, S
Longhin, A
Parenti, A
Posocco, M
Stanco, L
Turcato, M
Heaphy, EA
Metlica, F
Oh, BY
Whitmore, JJ
Iga, Y
D'Agostini, G
Marini, G
Nigro, A
Cormack, C
Hart, JC
McCubbin, NA
Heusch, C
Park, IH
Abramowicz, H
Gabareen, A
Kananov, S
Kreisel, A
Levy, A
Kuze, M
Fusayasu, T
Kagawa, S
Tawara, T
Yamashita, T
Hamatsu, R
Hirose, T
Inuzuka, M
Kaji, H
Kitamura, S
Matsuzawa, K
Costa, M
Ferrero, MI
Monaco, V
Sacchi, R
Solano, A
Arneodo, M
Ruspa, M
Koop, T
Martin, JF
Mirea, A
Butterworth, JM
Hall-Wilton, R
Jones, TW
Lightwood, MS
Sutton, MR
Targett-Adams, C
Ciborowski, J
Ciesielski, R
Luzniak, P
Nowak, RJ
Pawlak, M
Sztuk, J
Tymieniecka, T
Ukleja, A
Ukleja, J
Zarnecki, AF
Adamus, M
Plucinski, P
Eisenberg, Y
Hochman, D
Karshon, U
Riveline, M
Everett, A
Gladilin, LK
Kcira, D
Lammers, S
Li, L
Reeder, DD
Rosin, M
Ryan, P
Savin, AA
Smith, WH
Dhawan, S
Bhadra, S
Catterall, CD
Fourletov, S
Hartner, G
Menary, S
Soares, M
Standage, J
AF Chekanov, S
Derrick, M
Loizides, JH
Magill, S
Miglioranzi, S
Musgrave, B
Repond, J
Yoshida, R
Mattingly, MCK
Pavel, N
Antonioli, P
Bari, G
Basile, M
Bellagamba, L
Boscherini, D
Bruni, A
Bruni, G
Romeo, GC
Cifarelli, L
Cindolo, F
Contin, A
Corradi, M
De Pasquale, S
Giusti, P
Iacobucci, G
Margotti, A
Montanari, A
Nania, R
Palmonari, E
Pesci, A
Rinaldi, L
Sartorelli, G
Zichichi, A
Aghuzumtsyan, G
Bartsch, D
Brock, I
Goers, S
Hartmann, H
Hilger, E
Irrgang, P
Jakob, HP
Kind, O
Meyer, U
Paul, E
Rautenberg, J
Renner, R
Stifutkin, A
Tandler, J
Voss, KC
Wang, M
Bailey, DS
Brook, NH
Cole, JE
Heath, GP
Namsoo, T
Robins, S
Wing, M
Capau, M
Mastroberardino, A
Schioppa, M
Susinno, G
Kim, JY
Lim, IT
Ma, KJ
Pac, MY
Helbich, M
Ning, Y
Ren, Z
Schmidke, WB
Sciulli, F
Chwastowski, J
Eskreys, A
Figiel, J
Galas, A
Olkiewicz, K
Stopa, P
Zawiejski, L
Adamczyk, L
Bold, T
Grabowska-Bold, I
Kisielewska, D
Kowal, AM
Kowal, M
Lukasik, J
Przybycien, M
Suszycki, L
Szuba, D
Szuba, J
Kotanski, A
Slominski, W
Adler, V
Behrens, U
Bloch, I
Borras, K
Chiochia, V
Dannheim, D
Drews, G
Fourletova, J
Fricke, U
Geiser, A
Gottlicher, P
Gutsche, O
Haas, T
Hain, W
Hillert, S
Horn, C
Kahle, B
Kotz, U
Kowalski, H
Kramberger, G
Labes, H
Lelas, D
Lim, H
Lohr, B
Mankel, R
Melzer-Pellmann, IA
Nguyen, CN
Notz, D
Nuncio-Quiroz, AE
Polini, A
Raval, A
Schneekloth, U
Stosslein, U
Wolf, G
Youngman, C
Zeuner, W
Schlenstedt, S
Barbagli, G
Gallo, E
Genta, C
Pelfer, PG
Bamberger, A
Benen, A
Karstens, F
Dobur, D
Vlasov, NN
Bussey, PJ
Doyle, AT
Ferrando, J
Hamilton, J
Hanlon, S
Saxon, DH
Skillicorn, IO
Gialas, I
Carli, T
Gosau, T
Holm, U
Krumnack, N
Lohrmann, E
Milite, M
Salehi, H
Schleper, P
Schorner-Sadenius, T
Stonjek, S
Wichmann, K
Wick, K
Ziegler, A
Ziegler, A
Collins-Toogh, C
Foudas, C
Goncalo, R
Long, KR
Tapper, AD
Cloth, P
Filges, D
Kataoka, M
Nagano, K
Tokushuku, K
Yamada, S
Yamazaki, Y
Barakbaev, AN
Boos, EG
Pokrovskiy, NS
Zhautykov, BO
Son, D
de Favereau, J
Piotrzkowski, K
Barreiro, F
Glasman, C
Gonzalez, O
Labarga, L
del Peso, J
Tassi, E
Terron, J
Zambrana, M
Barbi, M
Corriveau, F
Gliga, S
Lainesse, J
Padhi, S
Stairs, DG
Walsh, R
Tsurugai, T
Antonov, A
Danilov, P
Dolgoshein, BA
Gladkov, D
Sosnovtsev, V
Suchkov, S
Dementiev, RK
Ermolov, PF
Katkov, II
Khein, LA
Korzhavina, IA
Kuzmin, VA
Levchenko, BB
Lukina, OY
Proskuryakov, AS
Shcheglova, LM
Zotkin, SA
Abt, I
Buttner, C
Caldwell, A
Liu, X
Sutiak, J
Coppola, N
Grigorescu, G
Grijpink, S
Keramidas, A
Koffeman, E
Kooijman, P
Maddox, E
Pellegrino, A
Schagen , S
Tiecke, H
Vazquez, M
Wiggers, L
de Wolf, E
Brummer, N
Bylsma, B
Durkin, LS
Ling, TY
Cooper-Sarkar, AM
Cottrell, A
Devenish, RCE
Foster, B
Grzelak, G
Gwenlan, C
Kohno, T
Patel, S
Straub, PB
Walczak, R
Bellan, P
Bertolin, A
Brugnera, R
Carlin, R
Dal Corso, F
Dusini, S
Garfagnini, A
Limentani, S
Longhin, A
Parenti, A
Posocco, M
Stanco, L
Turcato, M
Heaphy, EA
Metlica, F
Oh, BY
Whitmore, JJ
Iga, Y
D'Agostini, G
Marini, G
Nigro, A
Cormack, C
Hart, JC
McCubbin, NA
Heusch, C
Park, IH
Abramowicz, H
Gabareen, A
Kananov, S
Kreisel, A
Levy, A
Kuze, M
Fusayasu, T
Kagawa, S
Tawara, T
Yamashita, T
Hamatsu, R
Hirose, T
Inuzuka, M
Kaji, H
Kitamura, S
Matsuzawa, K
Costa, M
Ferrero, MI
Monaco, V
Sacchi, R
Solano, A
Arneodo, M
Ruspa, M
Koop, T
Martin, JF
Mirea, A
Butterworth, JM
Hall-Wilton, R
Jones, TW
Lightwood, MS
Sutton, MR
Targett-Adams, C
Ciborowski, J
Ciesielski, R
Luzniak, P
Nowak, RJ
Pawlak, M
Sztuk, J
Tymieniecka, T
Ukleja, A
Ukleja, J
Zarnecki, AF
Adamus, M
Plucinski, P
Eisenberg, Y
Hochman, D
Karshon, U
Riveline, M
Everett, A
Gladilin, LK
Kcira, D
Lammers, S
Li, L
Reeder, DD
Rosin, M
Ryan, P
Savin, AA
Smith, WH
Dhawan, S
Bhadra, S
Catterall, CD
Fourletov, S
Hartner, G
Menary, S
Soares, M
Standage, J
CA Zeus Collaboration
TI Substructure dependence of jet cross sections at HERA and determination
of alpha(S)
SO NUCLEAR PHYSICS B
LA English
DT Review
ID DEEP-INELASTIC-SCATTERING; DIJET ANGULAR-DISTRIBUTIONS; CENTRAL TRACKING
DETECTOR; PHYSICS EVENT GENERATION; ZEUS BARREL CALORIMETER; MONTE-CARLO
GENERATOR; COLOR DIPOLE MODEL; EP COLLIDER HERA; PARTON DISTRIBUTIONS;
GLUON JETS
AB Jet substructure and differential cross sections for jets produced in the photoproduction and deep inelastic ep scattering regimes have been measured with the ZEUS detector at HERA using an integrated luminosity of 82.2 pb(-1). The substructure of jets has been studied in terms of the jet shape and subjet multiplicity for jets with transverse energies E (jet)/(T) > 17 GeV. The data are well described by the QCD calculations. The jet shape and subjet multiplicity are used to tag gluon- and quarkjet initiated jets. Jet cross sections as functions of E (jet)/(T) , jet pseudorapidity, the jet-jet scattering angle, dijet invariant mass and the fraction of the photon energy carried by the dijet system are presented for gluon- and quark-tagged jets. The data exhibit the behaviour expected from the underlying parton dynamics. A value of alpha(s) (M-Z) of alpha(s) (M-Z) = 0.1176 +/- 0.0009(stat.) (+0.0009)/(-0.0026) (exp.) (+0.0091)/(-0.0072)(th.) was extracted from the measurements of jet shapes in deep inelastic scattering. (C) 2004 Published by Elsevier B.V.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
Andrews Univ, Berrien Springs, MI 49104 USA.
Humboldt Univ, Inst Phys, Berlin, Germany.
Univ Bologna, Bologna, Italy.
Ist Nazl Fis Nucl, I-40126 Bologna, Italy.
Univ Bonn, Inst Phys, D-5300 Bonn, Germany.
Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England.
Univ Calabria, Dept Phys, I-87036 Cosenza, Italy.
Ist Nazl Fis Nucl, Cosenza, Italy.
Chonnam Natl Univ, Kwangju, South Korea.
Columbia Univ, Nevis Labs, Irvington, NY 10027 USA.
Inst Nucl Phys, Krakow, Poland.
AGH Univ Sci & Technol, Fac Phys & Nucl Tech, Krakow, Poland.
Jagiellonian Univ, Dept Phys, Krakow, Poland.
DESY, Deutsch Elektron Synchrotron, D-2000 Hamburg, Germany.
DESY Zeuthen, Zeuthen, Germany.
Univ Florence, Florence, Italy.
Ist Nazl Fis Nucl, I-50125 Florence, Italy.
Univ Freiburg, Fak Phys, D-7800 Freiburg, Germany.
Univ Glasgow, Dept Phys & Astron, Glasgow, Lanark, Scotland.
Univ Aegean, Dept Engn Management & Finance, Aegean, Greece.
Univ Hamburg, Inst Expt Phys, Hamburg, Germany.
Univ London Imperial Coll Sci & Technol, High Energy Nucl Phys Grp, London, England.
Forschungszentrum Julich, Inst Kernchem, Julich, Germany.
KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki, Japan.
Minist Educ & Sci Kazakhstan, Inst Phys & Technol, Alma Ata, Kazakhstan.
Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea.
Catholic Univ Louvain, Inst Nucl Phys, B-1348 Louvain, Belgium.
Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain.
McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
Meiji Gakuin Univ, Fac Gen Educ, Yokohama, Kanagawa, Japan.
Moscow Engn Phys Inst, Moscow 115409, Russia.
Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow, Russia.
Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
NIKHEF, Amsterdam, Netherlands.
Univ Amsterdam, Amsterdam, Netherlands.
Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
Univ Oxford, Dept Phys, Oxford, England.
Univ Padua, Dipartimento Fis, Padua, Italy.
Ist Nazl Fis Nucl, Padua, Italy.
Penn State Univ, Dept Phys, University Pk, PA 16802 USA.
Polytech Univ, Sagamihara, Kanagawa, Japan.
Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
Ist Nazl Fis Nucl, Rome, Italy.
Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA.
Ewha Womans Univ, Dept Phys, Seoul, South Korea.
Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys, IL-69978 Tel Aviv, Israel.
Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan.
Univ Tokyo, Dept Phys, Tokyo 113, Japan.
Tokyo Metropolitan Univ, Dept Phys, Tokyo 158, Japan.
Univ Turin, Turin, Italy.
Ist Nazl Fis Nucl, I-10125 Turin, Italy.
Univ Piemont Orientale, Novara, Italy.
Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada.
UCL, Dept Phys & Astron, London, England.
Univ Warsaw, Inst Expt Phys, Warsaw, Poland.
Inst Nucl Studies, PL-00681 Warsaw, Poland.
Weizmann Inst Sci, Dept Particle Phys, Rehovot, Israel.
Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
Yale Univ, Dept Phys, New Haven, CT 06520 USA.
York Univ, Dept Phys, N York, ON M3J 1P3, Canada.
Nara Womens Univ, Nara, Japan.
RP Argonne Natl Lab, Argonne, IL 60439 USA.
EM yoshida@mail.desy.de
RI dusini, stefano/J-3686-2012; Goncalo, Ricardo/M-3153-2016; Carli,
Ina/C-2189-2017; Li, Liang/O-1107-2015; Capua, Marcella/A-8549-2015;
Suchkov, Sergey/M-6671-2015; De Pasquale, Salvatore/B-9165-2008; Wing,
Matthew/C-2169-2008; Doyle, Anthony/C-5889-2009; Ferrando,
James/A-9192-2012; Levchenko, B./D-9752-2012; Proskuryakov,
Alexander/J-6166-2012; Dementiev, Roman/K-7201-2012; Wiggers,
Leo/B-5218-2015; Gliga, Sebastian/K-4019-2015; Tassi,
Enrico/K-3958-2015; Gladilin, Leonid/B-5226-2011
OI dusini, stefano/0000-0002-1128-0664; Goncalo,
Ricardo/0000-0002-3826-3442; Carli, Ina/0000-0002-0411-1141; Li,
Liang/0000-0001-6411-6107; Capua, Marcella/0000-0002-2443-6525; Arneodo,
Michele/0000-0002-7790-7132; Gutsche, Oliver/0000-0002-8015-9622; De
Pasquale, Salvatore/0000-0001-9236-0748; Doyle,
Anthony/0000-0001-6322-6195; Ferrando, James/0000-0002-1007-7816;
Wiggers, Leo/0000-0003-1060-0520; Gliga, Sebastian/0000-0003-1729-1070;
Gladilin, Leonid/0000-0001-9422-8636
NR 102
TC 27
Z9 27
U1 0
U2 1
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 NOV 15
PY 2004
VL 700
IS 1-3
BP 3
EP 50
DI 10.1016/j.nuclphysb.2004.08.049
PG 48
WC Physics, Particles & Fields
SC Physics
GA 868SW
UT WOS:000224934300001
ER
PT J
AU Gaillard, MK
Giedt, J
Mints, AL
AF Gaillard, MK
Giedt, J
Mints, AL
TI Modular invariant gaugino condensation in the presence of an anomalous U
(1)
SO NUCLEAR PHYSICS B
LA English
DT Article
ID HETEROTIC STRING THEORY; EFFECTIVE LAGRANGIAN ANALYSIS; SOFT
SUPERSYMMETRY BREAKING; ANTISYMMETRIC TENSOR FIELD; GREEN-SCHWARZ
MECHANISM; CHERN-SIMONS FORMS; ONE-LOOP; SUPERSPACE GEOMETRY;
SUPERSTRING MODELS; LINEAR MULTIPLETS
AB Starting from the previously constructed effective supergravity theory below the scale of U(1) breaking in orbifold compactifications of the weakly coupled heterotic string, we study the effective theory below the scale of supersymmetry breaking by gaugino and matter condensation in a hidden sector. Questions we address include vacuum stability and the masses of the various moduli fields, including those associated with flat directions at the U(1) breaking scale, and of their fermionic superpartners. The issue of soft supersymmetry-breaking masses in the observable sector presents a particularly serious challenge for this class of models. (C) 2004 Elsevier B.V. All rights reserved.
C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
Lawrence Berkeley Natl Lab, Theoret Phys Grp, Berkeley, CA 94720 USA.
Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada.
RP Gaillard, MK (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM mkgaillard@lbl.gov; giedt@physics.utoronto.ca;
mints@socrates.berkeley.edu
NR 81
TC 8
Z9 8
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0550-3213
J9 NUCL PHYS B
JI Nucl. Phys. B
PD NOV 15
PY 2004
VL 700
IS 1-3
BP 205
EP 270
DI 10.1016/j.nuclphysb.2004.08.042
PG 66
WC Physics, Particles & Fields
SC Physics
GA 868SW
UT WOS:000224934300008
ER
PT J
AU Aydin, K
Guven, K
Kafesaki, M
Zhang, L
Soukoulis, CM
Ozbay, E
AF Aydin, K
Guven, K
Kafesaki, M
Zhang, L
Soukoulis, CM
Ozbay, E
TI Experimental observation of true left-handed transmission peaks in
metamaterials
SO OPTICS LETTERS
LA English
DT Article
ID FREE-SPACE
AB We report true left-handed (LH) behavior in a composite metamaterial consisting of a periodically arranged split ring resonator (SRR) and wire structures. We demonstrate the magnetic resonance of the SRR structure by comparing the transmission spectra of SRRs with those of closed SRRs. We have confirmed experimentally that the effective plasma frequency of the LH material composed of SRRs and wires is lower than the plasma frequency of the wires. A well-defined LH transmission band with a peak value of -1.2 dB (-0.3 dB/cm) was obtained. The experimental results agree extremely well with the theoretical calculations. (C) 2004 Optical Society of America.
C1 Bilkent Univ, Dept Phys, TR-06800 Ankara, Turkey.
Res Ctr Crete, Iraklion, Greece.
Univ Crete, Iraklion, Greece.
Iowa State Univ, US Dept Energy, Ames Lab, Ames, IA 50011 USA.
Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
Bilkent Univ, Nanotechnol Res Ctr, TR-06800 Ankara, Turkey.
Bilkent Univ, Dept Phys, TR-06800 Ankara, Turkey.
RP Aydin, K (reprint author), Bilkent Univ, Dept Phys, TR-06800 Ankara, Turkey.
EM aydin@fen.bilkent.edu.tr
RI Soukoulis, Costas/A-5295-2008; Ozbay, Ekmel/B-9495-2008; Aydin,
Koray/D-5100-2009; Aydin, Koray/G-2537-2011; Kafesaki, Maria/E-6843-2012
OI Aydin, Koray/0000-0002-3268-2216; Kafesaki, Maria/0000-0002-9524-2576
NR 12
TC 133
Z9 135
U1 3
U2 19
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 15
PY 2004
VL 29
IS 22
BP 2623
EP 2625
DI 10.1364/OL.29.002623
PG 3
WC Optics
SC Optics
GA 867AV
UT WOS:000224815400015
PM 15552665
ER
PT J
AU Nilsen, J
Scofield, JH
AF Nilsen, J
Scofield, JH
TI Plasmas with an index of refraction greater than 1
SO OPTICS LETTERS
LA English
DT Article
ID INTERFEROMETRY
AB Over the past decade, x-ray lasers in the wavelength range 14-47 nm have been used for interferometry of plasmas. As in optical interferometry of plasmas, the experimental analysis assumed that the index of refraction is due only to free electrons. This makes the index of refraction less than 1. Recent experiments in Al plasmas have shown fringe lines bending the wrong way as though the electron density were negative. We show how the bound electrons can dominate the index of refraction in many plasmas and make the index greater than 1 or enhance the index such that one would greatly overestimate the density of the plasma using interferometry. (C) 2004 Optical Society of America.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Nilsen, J (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM jnilsen@llnl.gov
NR 10
TC 16
Z9 16
U1 1
U2 3
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 15
PY 2004
VL 29
IS 22
BP 2677
EP 2679
DI 10.1364/OL.29.002677
PG 3
WC Optics
SC Optics
GA 867AV
UT WOS:000224815400033
PM 15552682
ER
PT J
AU Stevenson, K
Bromhal, GS
Ferer, M
Wilder, J
Smith, DH
AF Stevenson, K
Bromhal, GS
Ferer, M
Wilder, J
Smith, DH
TI Miscible, vertical network model 2-D simulations of two-phase flow
displacements in porous media
SO PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
LA English
DT Article
DE buoyancy driven instability; pore-level modeling; miscible drainage;
viscosity ratio
ID MONTE-CARLO SIMULATION; FINITE MOBILITY RATIO; 2-FLUID FLOW;
INSTABILITIES; DISPERSION; STABILITY; FLUID
AB A pore-level network model was used to study miscible, vertical, two-phase fluid displacements. Gravitationally unstable and stable flow configurations were explored with the Darcy-Rayleigh number (G) for a number of viscosity ratios (M). Simulations were compared with experimental results for corresponding values of G and M using interfacial width and breakthrough saturation as comparison criteria. Good agreement between the model and experimental results was observed. For gravitationally stable flows, a critical value of G,G(c)approximate to-0.02, was obtained from simulation results compared to an experimental value of G(c)approximate to0.017 found in the current literature. The transition from gravitationally stable to unstable flow was shown by decreased interfacial stability resulting in dramatically higher values of interfacial width (simulation) and dispersivity (experimental). Breakthrough saturations for gravitationally stable experimental flow configurations differed only a small amount from simulation results when considering the large length-to-width ratios of the experimental cores used for comparison. (C) 2004 Published by Elsevier B.V.
C1 W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA.
US DOE, Natl Energy Technol Lab, Morgantown, WV 26507 USA.
W Virginia Univ, Dept Stat, Morgantown, WV 26506 USA.
W Virginia Univ, Dept Math, Morgantown, WV 26506 USA.
RP Ferer, M (reprint author), W Virginia Univ, Dept Phys, POB 6315, Morgantown, WV 26506 USA.
EM MFerer@wvu.edu
NR 29
TC 2
Z9 2
U1 0
U2 0
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 15
PY 2004
VL 343
BP 317
EP 334
DI 10.1016/j.physa.2004.05.075
PG 18
WC Physics, Multidisciplinary
SC Physics
GA 862MV
UT WOS:000224495900022
ER
PT J
AU Claus, H
Uprety, KK
Ma, B
Paulikas, AP
Vlasko-Vlasov, VK
Welp, U
Veal, BW
Gray, KE
AF Claus, H
Uprety, KK
Ma, B
Paulikas, AP
Vlasko-Vlasov, VK
Welp, U
Veal, BW
Gray, KE
TI Reversible oxidation and critical current of YBa2CU3Ox coated conductors
SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
LA English
DT Article
ID DOPING-INDUCED ENHANCEMENT; GRAIN-BOUNDARIES; SINGLE-CRYSTALS; FILMS;
DEPOSITION; DENSITY; CALCIUM
AB We were able to vary the oxygen concentration of a YBCO coated-conductor sample from the under-doped to the over-doped regime. This was achieved by secondary oxygenation treatments at temperatures between 250degreesC and 500degreesC employing a novel oxygenation scheme. The YBCO-coated conductor was fabricated by the inclined substrate deposition method. Superconducting transition temperature and critical current as function of temperature and magnetic field were determined by a contact-free magnetization technique on a ring sample. It is observed that for temperatures at and below 77K, the maximum critical current is obtained in the most over-doped state where the transition temperature is significantly depressed. (C) 2004 Elsevier B.V. All rights reserved.
C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
Univ Illinois, Dept Phys, Chicago, IL 60607 USA.
Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA.
RP Claus, H (reprint author), Argonne Natl Lab, Div Mat Sci, MSD 223,9700 S Cass Ave, Argonne, IL 60439 USA.
EM claus@anl.gov
RI Ma, Beihai/I-1674-2013
OI Ma, Beihai/0000-0003-3557-2773
NR 15
TC 3
Z9 3
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0921-4534
J9 PHYSICA C
JI Physica C
PD NOV 15
PY 2004
VL 416
IS 1-2
BP 1
EP 10
DI 10.1016/j.physc.2004.08.008
PG 10
WC Physics, Applied
SC Physics
GA 871RU
UT WOS:000225151800001
ER
PT J
AU Thomson, R
Koslowski, M
LeSar, R
AF Thomson, R
Koslowski, M
LeSar, R
TI A noise induced transition in the deformation of metals
SO PHYSICS LETTERS A
LA English
DT Article
DE dislocation microstructures; stochastic dynamics
ID FCC METALS; PHYSICS
AB We introduce a simple stochastic model that describes the dynamics of the recovery of dislocations in dislocation cell walls in stage III deformation in fcc metals. The stage II/III transition is identified as a break between walls with well-defined populations and those with power law distributions. (C) 2004 Elsevier B.V. All rights reserved.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP LeSar, R (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM lesar@lanl.gov
RI Koslowski, Marisol/B-3123-2008; LeSar, Richard/G-1609-2012
NR 15
TC 5
Z9 5
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9601
J9 PHYS LETT A
JI Phys. Lett. A
PD NOV 15
PY 2004
VL 332
IS 3-4
BP 207
EP 212
DI 10.1016/j.physleta.2004.09.046
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 870GB
UT WOS:000225044500007
ER
PT J
AU Forde, CE
Rocco, JM
Fitch, JP
McCutchen-Maloney, SL
AF Forde, CE
Rocco, JM
Fitch, JP
McCutchen-Maloney, SL
TI Real-time characterization of virulence factor expression in Yersinia
pestis using a GFP reporter system
SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
LA English
DT Article
DE Yersinia pestis; virulence factor; real-time expression; biodefense;
transcriptional reporter system; green fluorescent protein
ID GREEN FLUORESCENT PROTEIN; LOW-CALCIUM RESPONSE; GENOME SEQUENCE;
GENE-EXPRESSION; IN-VITRO; ENTEROCOLITICA; BACTERIA; AUTOFLUORESCENCE;
FLAGELLA; PLAGUE
AB A real-time reporter system was developed to monitor the thermal induction of virulence factors in Yersinia pestis, the etiological agent of plague. The reporter system consists of a plasmid in Y. pestis in which the expression of green fluorescent protein (GFP) is under the control of the promoters for six virulence factors, yopE, sycE, yopT, yopT, yscN, and lcrE yopN, which are all components of the Type III secretion virulence mechanism of Y pestis. Induction of the expression of these genes in vivo was determined by the increase in fluorescence intensity of GFP in real time, in 96-well format. Different basal levels of expression at 26 degreesC were observed for the Y pestis promoters. Expressed as percentages of the level measured for the lac promoter (positive control), the basal expression levels before temperature shift were: yopE (15%), sycE(15%), yopK (13%), yopT(4%), lcrE (3.3%), and yscN(0.8%). Following the shift in temperature from 26 to 37 degreesC, the rates of expression of these genes increased with the yopE reporter showing the strongest degree of induction. The rates of induction of the other virulence factors after the temperature, expressed as percentages of yopE induction, were: yopK (57%), sycE (9%), yscN (3%), lcrE (3%), and yopT (2%). The thermal induction of each of these promoter fusions was repressed by calcium, and the ratios of the initial rates of thermal induction without calcium supplementation compared to the rate with calcium supplementation were: yopE (11-fold), yscN (7-fold), yopK (6-fold), lcrE (3-fold), yopT (2-fold), and sycE (1-fold). This work demonstrates a novel approach to quantify gene induction and provides a method to rapidly determine the effects of external stimuli on expression of Y pestis virulence factors in real time, in living cells, as a means to characterize virulence determinants. Published by Elsevier Inc.
C1 Lawrence Livermore Natl Lab, Biodefense Div, Biol & Biotechnol Res Program, Livermore, CA 94550 USA.
Lawrence Livermore Natl Lab, Chem & Biol Natl Secur Program, Livermore, CA 94550 USA.
RP McCutchen-Maloney, SL (reprint author), Lawrence Livermore Natl Lab, Biodefense Div, Biol & Biotechnol Res Program, 7000 E Ave, Livermore, CA 94550 USA.
EM smaloney@llnl.gov
NR 23
TC 5
Z9 6
U1 1
U2 3
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 NOV 12
PY 2004
VL 324
IS 2
BP 795
EP 800
DI 10.1016/j.bbrc.2004.08.236
PG 6
WC Biochemistry & Molecular Biology; Biophysics
SC Biochemistry & Molecular Biology; Biophysics
GA 866SR
UT WOS:000224794000047
PM 15474497
ER
PT J
AU Kirchstetter, TW
Novakov, T
Hobbs, PV
AF Kirchstetter, TW
Novakov, T
Hobbs, PV
TI Evidence that the spectral dependence of light absorption by aerosols is
affected by organic carbon
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
DE aerosol light absorption; biomass burning; organic carbon
ID SINGLE-SCATTERING ALBEDO; INTEGRATING SPHERE TECHNIQUES; AIRBORNE
PARTICULATE MATTER; PRIMARY PARTICLE EMISSIONS; INITIATIVE SAFARI 2000;
BLACK CARBON; OPTICAL-PROPERTIES; ATMOSPHERIC DUST; ABSORBING COMPONENT;
REFRACTIVE-INDEX
AB [1] The wavelength dependence of light absorption by aerosols collected on filters is investigated throughout the near-ultraviolet to near-infrared spectral region. Measurements were made using an optical transmission method. Aerosols produced by biomass combustion, including wood and savanna burning, and by motor vehicles, including diesel trucks, are included in the analysis. These aerosol types were distinguished by different wavelength (lambda) dependences in light absorption. Light absorption by the motor vehicle aerosols exhibited relatively weak wavelength dependence; absorption varied approximately as lambda(-1), indicating that black carbon ( BC) was the dominant absorbing aerosol component. By contrast, the biomass smoke aerosols had much stronger wavelength dependence, approximately lambda(-2). The stronger spectral dependence was the result of enhanced light absorption at wavelengths shorter than 600 nm and was largely reduced when much of the sample organic carbon (OC) was extracted by dissolution in acetone. This indicates that OC in addition to BC in the biomass smoke aerosols contributed significantly to measured light absorption in the ultraviolet and visible spectral regions and that OC in biomass burning aerosols may appreciably absorb solar radiation. Estimated absorption efficiencies and imaginary refractive indices are presented for the OC extracted from biomass burning samples and the BC in motor vehicle-dominated aerosol samples. The uncertainty of these constants is discussed. Overall, results of this investigation show that low-temperature, incomplete combustion processes, including biomass burning, can produce light-absorbing aerosols that exhibit much stronger spectral dependence than high-temperature combustion processes, such as diesel combustion.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA.
Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA.
RP Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, MS70-108B, Berkeley, CA 94720 USA.
EM twkirchstetter@lbl.gov
NR 66
TC 452
Z9 458
U1 11
U2 118
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 NOV 12
PY 2004
VL 109
IS D21
AR D21208
DI 10.1029/2004JD004999
PG 12
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 872EM
UT WOS:000225190500010
ER
PT J
AU Kevrekidis, PG
Khare, A
Saxena, A
Herring, G
AF Kevrekidis, PG
Khare, A
Saxena, A
Herring, G
TI On some classes of mKdV periodic solutions
SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
LA English
DT Article
ID DIFFERENTIAL-DIFFERENCE EQUATIONS; DE-VRIES EQUATION; HIERARCHY; CURVES;
PLASMA; PLANE
AB We obtain exact periodic solutions of the positive and negative modified Kortweg-de Vries (mKdV) equations. We examine the dynamical stability of these solitary wave lattices through direct numerical simulations. While the positive mKdV breather lattice solutions are found to be unstable, the two-soliton lattice solution of the same equation is found to be stable. Similarly, a negative mKdV lattice solution is found to be stable. We also touch upon the implications of these results for the KdV equation.
C1 Univ Massachusetts, Dept Math & Stat, Amherst, MA 01003 USA.
Inst Phys, Bhubaneswar 751005, Orissa, India.
Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Kevrekidis, PG (reprint author), Univ Massachusetts, Dept Math & Stat, Amherst, MA 01003 USA.
NR 24
TC 21
Z9 22
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0305-4470
J9 J PHYS A-MATH GEN
JI J. Phys. A-Math. Gen.
PD NOV 12
PY 2004
VL 37
IS 45
BP 10959
EP 10965
AR PII S0305-4470(04)75741-8
DI 10.1088/0305-4470/37/45/014
PG 7
WC Physics, Multidisciplinary; Physics, Mathematical
SC Physics
GA 875SM
UT WOS:000225442000016
ER
PT J
AU Adler, SS
Afanasiev, S
Aidala, C
Ajitanand, NN
Akiba, Y
Al-Jamel, A
Alexander, J
Aoki, K
Aphecetche, L
Armendariz, R
Aronson, SH
Averbeck, R
Awes, TC
Babintsev, V
Baldisseri, A
Barish, KN
Barnes, PD
Bassalleck, B
Bathe, S
Batsouli, S
Baublis, V
Bauer, F
Bazilevsky, A
Belikov, S
Bjorndal, MT
Boissevain, JG
Borel, H
Brooks, ML
Brown, DS
Bruner, N
Bucher, D
Buesching, H
Bumazhnov, V
Bunce, G
Burward-Hoy, JM
Butsyk, S
Camard, X
Chand, P
Chang, WC
Chernichenko, S
Chi, CY
Chiba, J
Chiu, M
Choi, IJ
Choudhury, RK
Chujo, T
Cianciolo, V
Cobigo, Y
Cole, BA
Comets, MP
Constantin, P
Csanad, M
Csorgo, T
Cussonneau, JP
d'Enterria, D
Das, K
David, G
Deak, F
Delagrange, H
Denisov, A
Deshpande, A
Desmond, EJ
Devismes, A
Dietzsch, O
Drachenberg, JL
Drapier, O
Drees, A
Durum, A
Dutta, D
Dzhordzhadze, V
Efremenko, YV
En'yo, H
Espagnon, B
Esumi, S
Fields, DE
Finck, C
Fleuret, F
Fokin, SL
Fox, BD
Fraenkel, Z
Frantz, JE
Franz, A
Frawley, AD
Fukao, Y
Fung, SY
Gadrat, S
Germain, M
Glenn, A
Gonin, M
Gosset, J
Goto, Y
de Cassagnac, RG
Grau, N
Greene, SV
Perdekamp, MG
Gustafsson, HA
Hachiya, T
Haggerty, JS
Hamagaki, H
Hansen, AG
Hartouni, EP
Harvey, M
Hasuko, K
Hayano, R
He, X
Heffner, M
Hemmick, TK
Heuser, JM
Hidas, P
Hiejima, H
Hill, JC
Hobbs, R
Holzmann, W
Homma, K
Hong, B
Hoover, A
Horaguchi, T
Ichihara, T
Ikonnikov, VV
Imai, K
Inaba, M
Inuzuka, M
Isenhower, D
Isenhower, L
Ishihara, M
Issah, M
Isupov, A
Jacak, BV
Jia, J
Jinnouchi, O
Johnson, BM
Johnson, SC
Joo, KS
Jouan, D
Kajihara, F
Kametani, S
Kamihara, N
Kaneta, M
Kang, JH
Katou, K
Kawabata, T
Kazantsev, A
Kelly, S
Khachaturov, B
Khanzadeev, A
Kikuchi, J
Kim, DJ
Kim, E
Kim, GB
Kim, HJ
Kinney, E
Kiss, A
Kistenev, E
Kiyomichi, A
Klein-Boesing, C
Kobayashi, H
Kochetkov, V
Kohara, R
Komkov, B
Konno, M
Kotchetkov, D
Kozlov, A
Kroon, PJ
Kuberg, CH
Kunde, GJ
Kurita, K
Kweon, MJ
Kwon, Y
Kyle, GS
Lacey, R
Lajoie, JG
Le Bornec, Y
Lebedev, A
Leckey, S
Lee, DM
Leitch, MJ
Leite, MAL
Li, X
Li, XH
Lim, H
Litvinenko, A
Liu, MX
Maguire, CF
Makdisi, YI
Malakhov, A
Manko, VI
Mao, Y
Martinez, G
Masui, H
Matathias, F
Matsumoto, T
McCain, MC
McGaughey, PL
Miake, Y
Miller, TE
Milov, A
Mioduszewski, S
Mishra, GC
Mitchell, JT
Mohanty, AK
Morrison, DP
Moss, JM
Mukhopadhyay, D
Muniruzzaman, M
Nagamiya, S
Nagle, JL
Nakamura, T
Newby, J
Nyanin, AS
Nystrand, J
O'Brien, E
Ogilvie, CA
Ohnishi, H
Ojha, ID
Okada, H
Okada, K
Oskarsson, A
Otterlund, I
Oyama, K
Ozawa, K
Pal, D
Palounek, APT
Pantuev, V
Papavassiliou, V
Park, J
Park, WJ
Pate, SF
Pei, H
Penev, V
Peng, JC
Pereira, H
Peresedov, V
Pierson, A
Pinkenburg, C
Pisani, RP
Purschke, ML
Purwar, AK
Qualls, J
Rak, J
Ravinovich, I
Read, KF
Reuter, M
Reygers, K
Riabov, V
Riabov, Y
Roche, G
Romana, A
Rosati, M
Rosendahl, S
Rosnet, P
Rykov, VL
Ryu, SS
Saito, N
Sakaguchi, T
Sakai, S
Samsonov, V
Sanfratello, L
Santo, R
Sato, HD
Sato, S
Sawada, S
Schutz, Y
Semenov, V
Seto, R
Shea, TK
Shein, I
Shibata, TA
Shigaki, K
Shimomura, M
Sickles, A
Silva, CL
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Shimomura, M
Sickles, A
Silva, CL
Silvermyr, D
Sim, KS
Soldatov, A
Soltz, RA
Sondheim, WE
Sorensen, S
Sourikova, IV
Staley, F
Stankus, PW
Stenlund, E
Stepanov, M
Ster, A
Stoll, SP
Sugitate, T
Sullivan, JP
Takagi, S
Takagui, EM
Taketani, A
Tanaka, KH
Tanaka, Y
Tanida, K
Tannenbaum, MJ
Taranenko, A
Tarjan, P
Thomas, TL
Togawa, M
Tojo, J
Torii, H
Towell, RS
Tram, VN
Tserruya, I
Tsuchimoto, Y
Tydesjo, H
Tyurin, N
Uam, TJ
van Hecke, HW
Velkovska, J
Velkovsky, M
Veszpremi, V
Vinogradov, AA
Volkov, MA
Vznuzdaev, E
Wang, XR
Watanabe, Y
White, SN
Willis, N
Wohn, FK
Woody, CL
Xie, W
Yanovich, A
Yokkaichi, S
Young, GR
Yushmanov, IE
Zajc, WA
Zaudtke, O
Zhang, C
Zhou, S
Zimanyi, J
Zolin, L
Zong, X
CA PHENIX Collaboration
TI Double helicity asymmetry in inclusive midrapidity pi(0) production for
polarized p+p collisions at root s=200 GeV
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DEEP-INELASTIC-SCATTERING; SPIN STRUCTURE FUNCTIONS; PROTON; DETECTORS
AB We present a measurement of the double longitudinal spin asymmetry in inclusive pi(0) production in polarized proton-proton collisions at roots=200 GeV. The data were taken at the Relativistic Heavy Ion Collider with average beam polarizations of 0.27. The measurements are the first in a program to study the longitudinal spin structure of the proton, using strongly interacting probes, at collider energies. The asymmetry is presented for transverse momenta 1-5 GeV/c at midrapidity, where next-to-leading-order perturbative quantum chromodynamic (NLO pQCD) calculations well describe the unpolarized cross section. The observed asymmetry is small and is compared to a NLO pQCD calculation with a range of polarized gluon distributions.
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
Abilene Christian Univ, Abilene, TX 79699 USA.
Acad Sinica, Inst Phys, Taipei 11529, Taiwan.
Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India.
Bhabha Atom Res Ctr, Bombay 400085, Maharashtra, India.
Univ Calif Riverside, Riverside, CA 92521 USA.
CIAE, Beijing, Peoples R China.
Univ Tokyo, Grad Sch Sci, Ctr Nucl Study, Bunkyo Ku, Tokyo 1130033, Japan.
Univ Colorado, Boulder, CO 80309 USA.
Columbia Univ, New York, NY 10027 USA.
Nevis Labs, Irvington, NY 10533 USA.
CEA Saclay, Dapnia, F-91191 Gif Sur Yvette, France.
Univ Debrecen, H-4010 Debrecen, Hungary.
Eotvos Lorand Univ, ELTE, H-1117 Budapest, Hungary.
Florida State Univ, Tallahassee, FL 32306 USA.
Georgia State Univ, Atlanta, GA 30303 USA.
Hiroshima Univ, Higashihiroshima 7398526, Japan.
Inst High Energy Phys, Protvino, Russia.
Univ Illinois, Urbana, IL 61801 USA.
Iowa State Univ, Ames, IA 50011 USA.
Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia.
High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki 3050801, Japan.
KFKI Res Inst Particle & Nucl Phys, H-1525 Budapest 114, Hungary.
Korea Univ, Seoul 136701, South Korea.
Russian Res Ctr, Kurchatov Inst, Moscow, Russia.
Kyoto Univ, Kyoto 6068394, Japan.
Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
Univ Clermont Ferrand, LPC, CNRS, IN2P3, F-63177 Clermont Ferrand, Aubiere, France.
Lund Univ, Dept Phys, SE-22100 Lund, Sweden.
Univ Munster, Inst Kernphys, D-48149 Munster, Germany.
Myongji Univ, Yongin 449728, Kyonggido, South Korea.
Nagasaki Inst Appl Sci, Nagasaki 8510193, Japan.
Univ New Mexico, Albuquerque, NM 87131 USA.
New Mexico State Univ, Las Cruces, NM 88003 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
Univ Paris 11, IPN Orsay, CNRS, IN2P3, F-91406 Orsay, France.
Peking Univ, Beijing 100871, Peoples R China.
Petersburg Nucl Phys Inst, Gatchina, Russia.
Inst Phys & Chem Res, Wako, Saitama 3510198, Japan.
Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA.
Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil.
Seoul Natl Univ, Syst Elect Lab, Seoul, South Korea.
SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
Univ Nantes, SUBATECH, Ecole Mines Nantes, CNRS,IN2P3, F-44307 Nantes, France.
Univ Tennessee, Knoxville, TN 37996 USA.
Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan.
Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 305, Japan.
Vanderbilt Univ, Nashville, TN 37235 USA.
Waseda Univ, Adv Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1620044, Japan.
Weizmann Inst Sci, IL-76100 Rehovot, Israel.
Yonsei Univ, IPAP, Seoul 120749, South Korea.
RP Adler, SS (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM zajc@nevis.columbia.edu
RI Csanad, Mate/D-5960-2012; Taketani, Atsushi/E-1803-2017; Semenov,
Vitaliy/E-9584-2017; Csorgo, Tamas/I-4183-2012; En'yo,
Hideto/B-2440-2015; Hayano, Ryugo/F-7889-2012; HAMAGAKI,
HIDEKI/G-4899-2014; Durum, Artur/C-3027-2014; Yokkaichi,
Satoshi/C-6215-2017
OI Taketani, Atsushi/0000-0002-4776-2315; Hayano,
Ryugo/0000-0002-1214-7806;
NR 28
TC 73
Z9 73
U1 6
U2 7
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 NOV 12
PY 2004
VL 93
IS 20
AR 202002
DI 10.1103/PhysRevLett.93.202002
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 870PB
UT WOS:000225068800017
PM 15600917
ER
PT J
AU Agashe, K
Perez, G
Soni, A
AF Agashe, K
Perez, G
Soni, A
TI B-factory signals for a warped extra dimension
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID FLAVOR VIOLATION; DECAYS; GEOMETRY; MIXINGS; MASSES; MODEL
AB We study predictions for B physics in a class of warped extra dimension models recently introduced, where few (similar to3) TeV Kaluza-Klein masses are consistent with electroweak data due to custodial symmetry. As in the standard model (SM), flavor violations arise due to the heavy top quark leading to striking signals: (i) New physics contributions to DeltaF=2 transitions are comparable to the SM, so the success of the SM unitarity triangle fit is a "coincidence." Thus, clean extractions of unitarity angles are likely to be affected, in addition to O(1) deviation from the SM prediction in B-s mixing. (ii) O(1) deviation from various SM predictions for B-->X(s)l(+)l(-). (iii) Large mixing-induced CP asymmetry in radiative B decays. Also, the neutron electric dipole moment is roughly 20 times larger than the current bound so that this framework has a "CP problem."
C1 Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA.
Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Agashe, K (reprint author), Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
EM kagashe@pha.jhu.edu; gperez@lbl.gov; soni@quark.phy.bnl.gov
NR 28
TC 147
Z9 147
U1 0
U2 0
PU AMERICAN 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 NOV 12
PY 2004
VL 93
IS 20
AR 201804
DI 10.1103/PhysRevLett.93.201804
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 870PB
UT WOS:000225068800014
PM 15600914
ER
PT J
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Leith, DWGS
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Kim, H
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Satpathy, A
Schwitters, RF
Izen, JM
Kitayama, I
Lou, XC
Ye, S
Bianchi, F
Bona, M
Gallo, F
Gamba, D
Borean, C
Bosisio, L
Cartaro, C
Cossutti, F
Della Ricca, G
Dittongo, S
Grancagnolo, S
Lanceri, L
Poropat, P
Vitale, L
Vuagnin, G
Panvini, RS
Banerjee, S
Brown, CM
Fortin, D
Jackson, PD
Kowalewski, R
Roney, JM
Sobie, RJ
Band, HR
Dasu, S
Datta, M
Eichenbaum, AM
Graham, M
Hollar, JJ
Johnson, JR
Kutter, PE
Li, H
Liu, R
Mihalyi, A
Mohapatra, AK
Pan, Y
Prepost, R
Rubin, AE
Sekula, SJ
Tan, P
von Wimmersperg-Toeller, JH
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Wu, SL
Yu, Z
Greene, MG
Neal, H
AF Aubert, B
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Boutigny, D
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de Monchenault, GH
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Langer, M
Legendre, M
London, GW
Mayer, B
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Vasseur, G
Yeche, C
Zito, M
Purohit, MV
Weidemann, AW
Wilson, JR
Yumiceva, FX
Aston, D
Bartoldus, R
Berger, N
Boyarski, AM
Buchmueller, OL
Claus, R
Convery, MR
Cristinziani, M
Nardo, GD
Dong, D
Dorfan, J
Dujmic, D
Dunwoodie, W
Elsen, EE
Fan, S
Field, RC
Glanzman, T
Gowdy, SJ
Hadig, T
Halyo, V
Hast, C
Hryn'ova, T
Innes, WR
Kelsey, MH
Kim, P
Kocian, ML
Leith, DWGS
Libby, J
Luitz, S
Luth, V
Lynch, HL
Marsiske, H
Messner, R
Muller, DR
O'Grady, CP
Ozcan, VE
Perazzo, A
Perl, M
Petrak, S
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Simi, G
Snyder, A
Soha, A
Stelzer, J
Su, D
Sullivan, MK
Va'vra, J
Wagner, SR
Weaver, M
Weinstein, AJR
Wisniewski, WJ
Wittgen, M
Wright, DH
Yarritu, AK
Young, CC
Burchat, PR
Edwards, AJ
Meyer, TI
Petersen, BA
Roat, C
Ahmed, S
Alam, MS
Ernst, JA
Saeed, MA
Saleem, M
Wappler, FR
Bugg, W
Krishnamurthy, M
Spanier, SM
Eckmann, R
Kim, H
Ritchie, JL
Satpathy, A
Schwitters, RF
Izen, JM
Kitayama, I
Lou, XC
Ye, S
Bianchi, F
Bona, M
Gallo, F
Gamba, D
Borean, C
Bosisio, L
Cartaro, C
Cossutti, F
Della Ricca, G
Dittongo, S
Grancagnolo, S
Lanceri, L
Poropat, P
Vitale, L
Vuagnin, G
Panvini, RS
Banerjee, S
Brown, CM
Fortin, D
Jackson, PD
Kowalewski, R
Roney, JM
Sobie, RJ
Band, HR
Dasu, S
Datta, M
Eichenbaum, AM
Graham, M
Hollar, JJ
Johnson, JR
Kutter, PE
Li, H
Liu, R
Mihalyi, A
Mohapatra, AK
Pan, Y
Prepost, R
Rubin, AE
Sekula, SJ
Tan, P
von Wimmersperg-Toeller, JH
Wu, J
Wu, SL
Yu, Z
Greene, MG
Neal, H
CA BaBar Collaboration
TI Measurement of time-dependent CP-violating asymmetries in B-0 -> K-*0
gamma(K-*0 -> K-S(0)pi(0)) decays
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
AB We present a measurement of the time-dependent CP-violating asymmetries in B-0-->K(*0)gamma(K-*0-->K(S)(0)pi(0)) decays based on 124x10(6) Y(4S)-->decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at the Stanford Linear Accelerator Center. In a sample containing 105+/-14 signal decays, we measure S(K)(*)gamma=0.25+/-0.63+/-0.14 and C(K)(*)gamma=-0.57+/-0.32+/-0.09, where the first error is statistical and the second, systematic.
C1 Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France.
Univ Bari, Dipartimento Fis, I-70126 Bari, Italy.
Ist Nazl Fis Nucl, I-70126 Bari, Italy.
Inst High Energy Phys, Beijing 100039, Peoples R China.
Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany.
Univ Bristol, Bristol BS8 1TL, Avon, England.
Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
Brunel Univ, Uxbridge UB8 3PH, Middx, England.
Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
Univ Calif Irvine, Irvine, CA 92697 USA.
Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
Univ Calif Riverside, Riverside, CA 92521 USA.
Univ Calif San Diego, La Jolla, CA 92093 USA.
Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA.
CALTECH, Pasadena, CA 91125 USA.
Univ Cincinnati, Cincinnati, OH 45221 USA.
Univ Colorado, Boulder, CO 80309 USA.
Colorado State Univ, Ft Collins, CO 80523 USA.
Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
Ecole Polytech, LLR, F-91128 Palaiseau, France.
Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy.
Ist Nazl Fis Nucl, I-44100 Ferrara, Italy.
Florida A&M Univ, Tallahassee, FL 32307 USA.
Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy.
Ist Nazl Fis Nucl, I-16146 Genoa, Italy.
Harvard Univ, Cambridge, MA 02138 USA.
Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany.
Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England.
Univ Iowa, Iowa City, IA 52242 USA.
Iowa State Univ, Ames, IA 50011 USA.
Lab Accelerateur Lineaire, F-91898 Orsay, France.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Univ Liverpool, Liverpool L69 72E, Merseyside, England.
Univ London, Queen Mary, London E1 4NS, England.
Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England.
Univ Louisville, Louisville, KY 40292 USA.
Univ Manchester, Manchester M13 9PL, Lancs, England.
Univ Maryland, College Pk, MD 20742 USA.
Univ Massachusetts, Amherst, MA 01003 USA.
MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
McGill Univ, Montreal, PQ H3A 2T8, Canada.
Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
Ist Nazl Fis Nucl, I-20133 Milan, Italy.
Univ Mississippi, University, MS 38677 USA.
Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada.
Mt Holyoke Coll, S Hadley, MA 01075 USA.
Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy.
Ist Nazl Fis Nucl, I-80126 Naples, Italy.
Natl Inst Nucl Phys & High Energy Phys, NIKHEF, NL-1009 DB Amsterdam, Netherlands.
Univ Notre Dame, Notre Dame, IN 46556 USA.
Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
Ohio State Univ, Columbus, OH 43210 USA.
Univ Oregon, Eugene, OR 97403 USA.
Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
Ist Nazl Fis Nucl, I-35131 Padua, Italy.
Univ Paris 06, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France.
Univ Paris 07, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France.
Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy.
Ist Nazl Fis Nucl, I-27100 Pavia, Italy.
Univ Penn, Philadelphia, PA 19104 USA.
Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
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Univ Pisa, Dipartimento Fis, Scuola Normale Super Pisa, I-56127 Pisa, Italy.
Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
Prairie View A&M Univ, Prairie View, TX 77446 USA.
Princeton Univ, Princeton, NJ 08544 USA.
Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
Ist Nazl Fis Nucl, I-00185 Rome, Italy.
Univ Rostock, D-18051 Rostock, Germany.
Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France.
Univ S Carolina, Columbia, SC 29208 USA.
Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
Stanford Univ, Stanford, CA 94305 USA.
SUNY Albany, Albany, NY 12222 USA.
Univ Tennessee, Knoxville, TN 37996 USA.
Univ Texas, Austin, TX 78712 USA.
Univ Texas, Richardson, TX 75083 USA.
Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
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Vanderbilt Univ, Nashville, TN 37235 USA.
Univ Victoria, Victoria, BC V8W 3P6, Canada.
Univ Wisconsin, Madison, WI 53706 USA.
Yale Univ, New Haven, CT 06511 USA.
Univ Basilicata, I-85100 Potenza, Italy.
Univ Valencia, CSIC, Inst Fis Corpuscular, IFIC, Valencia, Spain.
RP Aubert, B (reprint author), Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France.
RI Luppi, Eleonora/A-4902-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese,
Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal,
F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere,
Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Lusiani,
Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Morandin,
Mauro/A-3308-2016; Della Ricca, Giuseppe/B-6826-2013; Di Lodovico,
Francesca/L-9109-2016; Calcaterra, Alessandro/P-5260-2015; Frey,
Raymond/E-2830-2016; de Groot, Nicolo/A-2675-2009; Negrini,
Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Lista,
Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; crosetti,
nanni/H-3040-2011; Neri, Nicola/G-3991-2012; Forti,
Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani,
Claudia/C-5223-2009; de Sangro, Riccardo/J-2901-2012; Sarti,
Alessio/I-2833-2012; Saeed, Mohammad Alam/J-7455-2012
OI Luppi, Eleonora/0000-0002-1072-5633; Calabrese,
Roberto/0000-0002-1354-5400; Mir, Lluisa-Maria/0000-0002-4276-715X;
Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky,
Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480;
Grancagnolo, Sergio/0000-0001-8490-8304; Lusiani,
Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288;
Morandin, Mauro/0000-0003-4708-4240; Della Ricca,
Giuseppe/0000-0003-2831-6982; Di Lodovico,
Francesca/0000-0003-3952-2175; Calcaterra,
Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636;
Negrini, Matteo/0000-0003-0101-6963; Monge, Maria
Roberta/0000-0003-1633-3195; Bellini, Fabio/0000-0002-2936-660X; Neri,
Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965;
Rotondo, Marcello/0000-0001-5704-6163; Patrignani,
Claudia/0000-0002-5882-1747; de Sangro, Riccardo/0000-0002-3808-5455;
Sarti, Alessio/0000-0001-5419-7951; Saeed, Mohammad
Alam/0000-0002-3529-9255
NR 11
TC 0
Z9 0
U1 0
U2 5
PU AMERICAN 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 NOV 12
PY 2004
VL 93
IS 20
AR 201801
DI 10.1103/PhysRevLett.93.201801
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 870PB
UT WOS:000225068800011
ER
PT J
AU Awramik, M
Czakon, M
Freitas, A
Weiglein, G
AF Awramik, M
Czakon, M
Freitas, A
Weiglein, G
TI Complete two-loop electroweak fermionic corrections to the effective
leptonic weak mixing angle sin(2)theta(lept)(eff) and indirect
determination of the Higgs boson mass
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID VACUUM-POLARIZATION FUNCTIONS; STANDARD-MODEL; HEAVY-TOP; M-W;
DIFFERENTIAL-EQUATIONS; QCD CORRECTIONS; MUON LIFETIME; PARAMETERS;
DIAGRAMS; LOOP
AB We present a complete calculation of the contributions to the effective leptonic weak mixing angle, sin(2)theta(eff)(lept), generated by closed fermion loops at the two-loop level of the electroweak interactions. This quantity is the source of the most stringent bound on the mass M-H of the standard model Higgs boson. The size of the corrections with respect to known partial results varies between -4x10(-5) and -8x10(-5) for a realistic range of M-H from 100 to 300 GeV. This translates into a shift of the predicted (from sin(2)theta(eff)(lept) alone) central value of M-H by +19 GeV, to be compared with the shift induced by a recent change in the measured top quark mass which amounts to +36 GeV.
C1 DESY, D-15738 Zeuthen, Germany.
PAS, Inst Nucl Phys, PL-31342 Krakow, Poland.
Univ Silesia, Inst Phys, PL-40007 Katowice, Poland.
Fermilab Natl Accelerator Lab, Div Theoret Phys, Batavia, IL 60510 USA.
Univ Durham, Inst Particle Phys Phenomenol, Durham DH1 3LE, England.
RP Awramik, M (reprint author), DESY, Platanenallee 6, D-15738 Zeuthen, Germany.
NR 37
TC 76
Z9 76
U1 1
U2 1
PU AMERICAN 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 NOV 12
PY 2004
VL 93
IS 20
AR 201805
DI 10.1103/PhysRevLett.93.201805
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 870PB
UT WOS:000225068800015
PM 15600915
ER
PT J
AU Holstein, BR
Donoghue, JF
AF Holstein, BR
Donoghue, JF
TI Classical physics and quantum loops
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID GENERAL-RELATIVITY; POTENTIALS
AB The standard picture of the loop expansion associates a factor of h with each loop, suggesting that the tree diagrams are to be associated with classical physics, while loop effects are quantum mechanical in nature. We discuss counterexamples wherein classical effects arise from loop diagrams and display the relationship between the classical terms and the long range effects of massless particles.
C1 Univ Massachusetts, Dept Phys, LGRT, Amherst, MA 01003 USA.
Thomas Jefferson Natl Accelerator Lab, Theory Grp, Newport News, VA 23606 USA.
RP Holstein, BR (reprint author), Univ Massachusetts, Dept Phys, LGRT, Amherst, MA 01003 USA.
OI Donoghue, John/0000-0001-7282-5894
NR 15
TC 24
Z9 24
U1 0
U2 0
PU AMERICAN 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 NOV 12
PY 2004
VL 93
IS 20
AR 201602
DI 10.1103/PhysRevLett.93.201602
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 870PB
UT WOS:000225068800010
PM 15600910
ER
PT J
AU Kim, KH
Harrison, N
Amitsuka, H
Jorge, GA
Jaime, M
Mydosh, JA
AF Kim, KH
Harrison, N
Amitsuka, H
Jorge, GA
Jaime, M
Mydosh, JA
TI Nexus between quantum criticality and phase formation in
U(Ru1-xRhx)(2)Si-2
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID HEAVY-FERMION COMPOUNDS; HIDDEN ORDER; SUPERCONDUCTIVITY; STATES;
TRANSITION; ITINERANT; URU2SI2
AB Simplification of the magnetic field-versus-temperature phase diagram and quantum criticality in URu2Si2 dilutely doped with Rh are studied by measuring the magnetization and resistivity in magnetic fields of up to 45 T. For x=4%, the hidden order is completely destroyed, leaving a single field-induced phase II. A correlation between the field dependence of this phase and that of the quantum critical point, combined with the suppression of the T-2 coefficient of the resistivity within it, implicates field-tuned quantum criticality as an important factor in phase formation.
C1 Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA.
Hokkaido Univ, Grad Sch Sci, Sapporo, Hokkaido 0600810, Japan.
Leiden Univ, Kamerlingh Onnes Lab, NL-2300 RA Leiden, Netherlands.
Max Planck Inst Chem Phys Fester Stoffe, D-01187 Dresden, Germany.
RP Seoul Natl Univ, CSCMR, Seoul 151742, South Korea.
RI Amitsuka, Hiroshi/K-8539-2012; Jaime, Marcelo/F-3791-2015
OI Jaime, Marcelo/0000-0001-5360-5220
NR 30
TC 26
Z9 26
U1 3
U2 11
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 NOV 12
PY 2004
VL 93
IS 20
AR 206402
DI 10.1103/PhysRevLett.93.206402
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 870PB
UT WOS:000225068800046
PM 15600946
ER
PT J
AU Kraynik, AM
Reinelt, DA
van Swol, F
AF Kraynik, AM
Reinelt, DA
van Swol, F
TI Structure of random foam
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID COUNTEREXAMPLE; CONJECTURE; POLYHEDRA; BUBBLES; GRAIN; CELLS
AB The Surface Evolver was used to compute the equilibrium microstructure of dry soap foams with random structure and a wide range of cell-size distributions. Topological and geometric properties of foams and individual cells were evaluated. The theory for isotropic Plateau polyhedra describes the dependence of cell geometric properties on their volume and number of faces. The surface area of all cells is about 10% greater than a sphere of equal volume; this leads to a simple but accurate theory for the surface free energy density of foam. A novel parameter based on the surface-volume mean bubble radius R-32 is used to characterize foam polydispersity. The foam energy, total cell edge length, and average number of faces per cell all decrease with increasing polydispersity. Pentagonal faces are the most common in monodisperse foam but quadrilaterals take over in highly polydisperse structures.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
So Methodist Univ, Dept Math, Dallas, TX 75275 USA.
RP Kraynik, AM (reprint author), Sandia Natl Labs, Dept 9114 MS0834, Albuquerque, NM 87185 USA.
EM amkrayn@sandia.gov
NR 26
TC 81
Z9 82
U1 3
U2 20
PU AMERICAN 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 NOV 12
PY 2004
VL 93
IS 20
AR 208301
DI 10.1103/PhysRevLett.93.208301
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 870PB
UT WOS:000225068800078
PM 15600978
ER
PT J
AU Li, YW
Montano, PA
Mitchell, JF
Barbiellini, B
Mijnarends, PE
Kaprzyk, S
Bansil, A
AF Li, YW
Montano, PA
Mitchell, JF
Barbiellini, B
Mijnarends, PE
Kaprzyk, S
Bansil, A
TI Temperature-dependent orbital degree of freedom of a bilayer manganite
by magnetic Compton scattering
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ELECTRONIC-STRUCTURE; LA2-2XSR1+2XMN2O7; OXIDES; LA1.2SR1.8MN2O7;
LASR2MN2O7
AB We have measured temperature-dependent magnetic Compton profiles (MCPs) from a single crystal of La1.2Sr1.8Mn2O7. The MCPs, which involved the scattering of circularly polarized x rays, are in general related to the momentum density of all the unpaired spins in the system. Nevertheless, we show that when the x-ray scattering vector lies along the [110] direction, the number of magnetic electrons of a specific symmetry, i.e., d electrons of x(2)-y(2) symmetry, yield a distinct signature in the MCP, allowing us to monitor substantial changes in the occupancy of the d(x)(2)-y(2) states over the investigated temperature range of 5-200 K. This study indicates that magnetic Compton scattering can provide a powerful window on the properties of specific magnetic electrons in complex materials.
C1 Univ Illinois, Dept Phys, Chicago, IL 60680 USA.
Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
US DOE, Washington, DC 20585 USA.
Northeastern Univ, Dept Phys, Boston, MA 02115 USA.
Delft Univ Technol, Interfac Reactor Inst, NL-2629 JB Delft, Netherlands.
AGH Univ Sci & Technol, PL-30059 Krakow, Poland.
RP Li, YW (reprint author), Univ Illinois, Dept Phys, Chicago, IL 60680 USA.
RI Barbiellini, Bernardo/K-3619-2015
OI Barbiellini, Bernardo/0000-0002-3309-1362
NR 21
TC 10
Z9 10
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 NOV 12
PY 2004
VL 93
IS 20
AR 207206
DI 10.1103/PhysRevLett.93.207206
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 870PB
UT WOS:000225068800066
PM 15600966
ER
PT J
AU Liliental-Weber, Z
Tomaszewicz, T
Zakharov, D
Jasinski, J
O'Keefe, MA
AF Liliental-Weber, Z
Tomaszewicz, T
Zakharov, D
Jasinski, J
O'Keefe, MA
TI Atomic structure of defects in GaN : Mg grown with Ga polarity
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DOPED GAN
AB The atomic structure of characteristic defects (Mg-rich hexagonal pyramids and truncated pyramids) in GaN:Mg thin films grown with Ga polarity was determined at atomic resolution by reconstruction of the scattered electron wave in a transmission electron microscope. Small cavities within the defects have inside walls covered by GaN of reverse polarity. We propose that lateral overgrowth of the cavities restores matrix polarity on the defect base. From matrix to defect, exchange of Ga and N sublattices leads to a 0.6+/-0.2 Angstrom displacement of Ga sublattices. We observe a [1 (1) under bar 00]/3 shift from matrix AB stacking to BC stacking for the entire pyramid. Electron energy loss spectroscopy detected changes in N edge and presence of oxygen on the defect walls. Our results explain commonly observed decrease of acceptor concentration in heavily doped GaN:Mg.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Liliental-Weber, Z (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RI Liliental-Weber, Zuzanna/H-8006-2012; Zakharov, Dmitri/F-4493-2014
NR 18
TC 23
Z9 23
U1 2
U2 21
PU AMERICAN 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 NOV 12
PY 2004
VL 93
IS 20
AR 206102
DI 10.1103/PhysRevLett.93.206102
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 870PB
UT WOS:000225068800042
PM 15600942
ER
PT J
AU Woodruff, S
Stallard, BW
McLean, HS
Hooper, EB
Bulmer, R
Cohen, BI
Hill, DN
Holcomb, CT
Moller, J
Wood, RD
AF Woodruff, S
Stallard, BW
McLean, HS
Hooper, EB
Bulmer, R
Cohen, BI
Hill, DN
Holcomb, CT
Moller, J
Wood, RD
TI Increasing the magnetic helicity content of a plasma by pulsing a
magnetized source
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SPHEROMAK PLASMA; CURRENT DRIVE; RECONNECTION; INJECTION; BALANCE
AB By operating a magnetized coaxial gun in a pulsed mode it is possible to produce large voltage pulses of duration similar to500 mus while reaching a few kV, giving a discrete input of helicity into a spheromak. In the sustained spheromak physics experiment (SSPX), it is observed that pulsing serves to nearly double the stored magnetic energy and double the temperature. We discuss these results by comparison with 3D MHD simulations of the same phenomenon.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Woodruff, S (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
NR 21
TC 14
Z9 14
U1 1
U2 7
PU AMERICAN 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 NOV 12
PY 2004
VL 93
IS 20
AR 205002
DI 10.1103/PhysRevLett.93.205002
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 870PB
UT WOS:000225068800033
PM 15600933
ER
PT J
AU Uchic, MD
Dimiduk, DM
Florando, JN
Nix, WD
AF Uchic, MD
Dimiduk, DM
Florando, JN
Nix, WD
TI Oxide surface films on metal crystals - Response
SO SCIENCE
LA English
DT Letter
C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA.
RP Uchic, MD (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA.
NR 2
TC 7
Z9 7
U1 1
U2 20
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 NOV 12
PY 2004
VL 306
IS 5699
BP 1134
EP 1135
PG 2
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 872FM
UT WOS:000225193100024
ER
PT J
AU Townsend, D
Lahankar, SA
Lee, SK
Chambreau, SD
Suits, AG
Zhang, X
Rheinecker, J
Harding, LB
Bowman, JM
AF Townsend, D
Lahankar, SA
Lee, SK
Chambreau, SD
Suits, AG
Zhang, X
Rheinecker, J
Harding, LB
Bowman, JM
TI The roaming atom: Straying from the reaction path in formaldehyde
decomposition
SO SCIENCE
LA English
DT Article
ID QUANTUM-STATE CORRELATIONS; PHOTOFRAGMENTATION DYNAMICS; DISTRIBUTIONS;
DISSOCIATION; H2CO->H-2+CO
AB We present a combined experimental and theoretical investigation of formaldehyde (H2CO) dissociation to H-2 and CO at energies just above the threshold for competing H elimination. High-resolution state-resolved imaging measurements of the CO velocity distributions reveal two dissociation pathways. The first proceeds through a well-established transition state to produce rotationally excited CO and vibrationally cold H-2. The second dissociation pathway yields rotationally cold CO in conjunction with highly vibrationally excited H-2. Quasi-classical trajectory calculations performed on a global potential energy surface for H2CO suggest that this second channel represents an intramolecular hydrogen abstraction mechanism: One hydrogen atom explores large regions of the potential energy surface before bonding with the second H atom, bypassing the saddle point entirely.
C1 SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
Wayne State Univ, Dept Chem, Detroit, MI 48202 USA.
Emory Univ, Dept Chem, Atlanta, GA 30322 USA.
Emory Univ, Cherry L Emerson Ctr Sci Computat, Atlanta, GA 30322 USA.
Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
RP Suits, AG (reprint author), SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
EM asuits@wayne.edu; jmbowma@emory.edu
RI Townsend, Dave/K-3461-2015
NR 21
TC 296
Z9 298
U1 14
U2 113
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 NOV 12
PY 2004
VL 306
IS 5699
BP 1158
EP 1161
DI 10.1126/science.1104386
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 872FM
UT WOS:000225193100040
PM 15498970
ER
PT J
AU Bell, P
Aguirre, F
Grant, ER
Pratt, ST
AF Bell, P
Aguirre, F
Grant, ER
Pratt, ST
TI State-selective production of vibrationally excited NO2+ by
double-resonant photoionization
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID OPTICAL DOUBLE-RESONANCE; STRETCH FERMI RESONANCE;
PHOTOELECTRON-SPECTROSCOPY; ROVIBRONIC INTERACTIONS; FORMALDEHYDE
CATION; COLLISION ENERGY; RYDBERG STATE; ION CHEMISTRY; NITRIC-ACID;
IONIZATION
AB Two-color, two-photon resonant, three-photon ionization, and high-resolution photoelectron spectroscopy are combined to characterize the photoionization dynamics of the 3psigma (2)Sigma(u)(+) electronic state of NO2. Direct photoionization of selected vibrational levels of the NO2 3psigma (2)Sigma(u)(+) state shows a strong propensity to preserve the vibrational quantum numbers of the intermediate state. Efficient methods for producing NO2+ X (1)Sigma(u)(+) (000), (010), (100), and (001) with over 95% purity are discussed. This approach is expected to be applicable u to the study of the mode dependence of the effects of vibrational excitation in ion-molecule reactions involving NO2+.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA.
RP Pratt, ST (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 42
TC 7
Z9 7
U1 1
U2 4
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 NOV 11
PY 2004
VL 108
IS 45
BP 9645
EP 9651
DI 10.1021/jp0400364
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 869ON
UT WOS:000224994000004
ER
PT J
AU Parsons, BF
Chandler, DW
Sklute, EC
Li, SL
Wade, EA
AF Parsons, BF
Chandler, DW
Sklute, EC
Li, SL
Wade, EA
TI Photodissociation dynamics of ArNO clusters
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID CENTER-DOT-NO; CROSS-SECTION; INELASTIC-SCATTERING; WAALS COMPLEXES;
STATE; VAN; DISTRIBUTIONS; SPECTROSCOPY; MOLECULES; PHOTOFRAGMENTATION
AB We have investigated the dissociation dynamics of the ArNO van der Waals molecule near 225 nm. This photon energy excites ArNO as much as 400 cm(-1) above the photodissociation threshold, producing Ar + NO(A (2)Sigma(+), v=0,N=0-12). In the first series of experiments, we deduce the population of rotational levels produced in NO(A) during photodissociation of ArNO with resonance enhanced multiphoton spectroscopy (REMPI) through the E-state. The rotational state distributions show anomalous nonstatistical behavior peaking near high N states. This behavior is consistent with the rotational rainbow effects observed by others with the maximum rotational quantum number proportional to the square root of the available energy. In the second experiments, 225 nm photons sequentially dissociate ArNO and then nonresonantly ionize the NO(A) products, which we observe using velocity-mapped ion imaging. The ion images display rings corresponding to the production of different rotational states of NO(A) during dissociation. We measure the appearance threshold for products from dissociation of ArNO to produce NO(A,N=O) as 44291 +/- 2 cm(-1). Finally, we observe the contribution of hot bands to the rotational state distribution.
C1 Mills Coll, Dept Chem & Phys, Oakland, CA 94613 USA.
Sandia Natl Labs, Combust Res Facil, Livermore, CA 94550 USA.
RP Chandler, DW (reprint author), Sandia Natl Labs, Combust Res Facil, Livermore, CA 94550 USA.
NR 28
TC 15
Z9 15
U1 5
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 NOV 11
PY 2004
VL 108
IS 45
BP 9742
EP 9749
DI 10.1021/jp047433z
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 869ON
UT WOS:000224994000015
ER
PT J
AU Meloni, G
Sheehan, SM
Ferguson, MJ
Neumark, DM
AF Meloni, G
Sheehan, SM
Ferguson, MJ
Neumark, DM
TI Negative ion photoelectron spectroscopy of SiN
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID SILICON-NITRIDE; AB-INITIO; SPECTRUM; STATE; PHOTODETACHMENT;
TRANSITION; SYSTEM; CN
AB Negative ion photoelectron spectra of SiN- have been recorded using the 355 nm (3.493 eV) and 266 nm (4.661 eV) photodetachment wavelengths. The spectra exhibit resolved vibrational features corresponding to transitions to the X (2)Sigma(+) and A (2)Pi states of SiN. Franck-Condon analyses yield the first experimental spectroscopic parameters, r(e), and (omega(e) for the anion ground state, X (1)Sigma(+). We also determined the first experimental adiabatic electron affinity as 2.949 +/- 0.008 eV. The anion dissociation energy D-0(SiN-) is then obtained from the electron affinities of Si and SiN and the dissociation energy of the neutral.
C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Neumark, DM (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
RI Neumark, Daniel/B-9551-2009
OI Neumark, Daniel/0000-0002-3762-9473
NR 33
TC 12
Z9 12
U1 0
U2 0
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 NOV 11
PY 2004
VL 108
IS 45
BP 9750
EP 9754
DI 10.1021/jp047910d
PG 5
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 869ON
UT WOS:000224994000016
ER
PT J
AU Ruscic, B
Pinzon, RE
Morton, ML
von Laszevski, G
Bittner, SJ
Nijsure, SG
Amin, KA
Minkoff, M
Wagner, AF
AF Ruscic, B
Pinzon, RE
Morton, ML
von Laszevski, G
Bittner, SJ
Nijsure, SG
Amin, KA
Minkoff, M
Wagner, AF
TI Introduction to active thermochemical tables: Several "key" enthalpies
of formation revisited
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Review
ID ROTATIONALLY RESOLVED PHOTOIONIZATION; RESOLUTION
PHOTOELECTRON-SPECTROSCOPY; PAIR PRODUCTION SPECTROSCOPY; VACUUM-UV
REGION; DISSOCIATION-ENERGY; ELECTRON-AFFINITY; MOLECULAR-HYDROGEN;
IONIZATION-ENERGY; LASER PHOTODETACHMENT; ABSORPTION-SPECTRUM
AB The concept behind active thermochemical tables (ATcT) is presented. As opposed to traditional sequential thermochernistry, ATcT provides reliable, accurate, and internally consistent thermochemistry by utilizing the thermochemical network (TN) approach. This involves, inter alia, a statistical analysis of thermochemically relevant determinations that define the TN, made possible by redundancies in the TN, such as competing measurements and alternate network pathways that interrelate the various chemical species. The statistical analysis produces a self-consistent TN, from which the optimal thermochemical values are obtained by simultaneous solution in error-weighted space, thus allowing optimal use of all of the knowledge present in the TN. ATcT offers a number of additional features that are not present nor possible in the traditional approach. With ATcT, new knowledge can be painlessly propagated through all affected thermochemical values. ATcT also allows hypothesis testing and evaluation, as well as discovery of weak links in the TN. The latter provides pointers to new experimental or theoretical determinations that will most efficiently improve the underlying thermochemical body of knowledge. The ATcT approach is illustrated by providing improved thermochernistry for several key thermochemical species.
C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA.
RP Ruscic, B (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM ruscic@anl.gov
RI Ruscic, Branko/A-8716-2008
OI Ruscic, Branko/0000-0002-4372-6990
NR 167
TC 248
Z9 248
U1 4
U2 41
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD NOV 11
PY 2004
VL 108
IS 45
BP 9979
EP 9997
DI 10.1021/jp047912y
PG 19
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 869ON
UT WOS:000224994000044
ER
PT J
AU Gregg, BA
AF Gregg, BA
TI Toward a unified treatment of electronic processes in organic
semiconductors
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Letter
ID CRYSTAL PERYLENE DIIMIDE; CONJUGATED POLYMER-FILMS;
LIGHT-EMITTING-DIODES; CHARGE-TRANSPORT; PHOTOVOLTAIC CELLS;
MONTE-CARLO; SOLAR-CELLS; CONDUCTIVITY; PHTHALOCYANINE; COSUBLIMATION
AB A quantitative study of n-type doping in highly crystalline organic semiconductor films establishes the predominant influence of electrostatic forces in these low-dielectric materials. On the basis of these findings, a self-consistent model of doped (purposely or not) organic semiconductors is proposed in which the equilibrium free carrier density, n(f), is a small fraction of the total charge density, a superlinear increase in conductivity with doping density is universal, n(f) increases with applied electric field, and the carrier mobility is field dependent regardless of crystallinity.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Gregg, BA (reprint author), Natl Renewable Energy Lab, 1617 Cole Boulevard, Golden, CO 80401 USA.
EM brian_gregg@nrel.gov
NR 44
TC 13
Z9 13
U1 0
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 NOV 11
PY 2004
VL 108
IS 45
BP 17285
EP 17289
DI 10.1021/jp045940a
PG 5
WC Chemistry, Physical
SC Chemistry
GA 869OM
UT WOS:000224993900005
ER
PT J
AU Chen, SG
Branz, HM
Eaton, SS
Taylor, PC
Cormier, RA
Gregg, BA
AF Chen, SG
Branz, HM
Eaton, SS
Taylor, PC
Cormier, RA
Gregg, BA
TI Substitutional n-type doping of an organic semiconductor investigated by
electron paramagnetic resonance spectroscopy
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID CRYSTAL PERYLENE DIIMIDE; SOLAR-CELLS; CONJUGATED POLYMERS; PHOTOVOLTAIC
CELLS; CHARGE-TRANSPORT; THIN-FILMS; PHTHALOCYANINE; CONDUCTIVITY;
SOLIDS; METAL
AB Doping a perylene diimide organic semiconductor with a one-electron reduced perylene diimide containing a covalently bound counterion provides a well-characterized system for understanding doping in organic semiconductors. We obtain insight into the doping process by electron paramagnetic resonance (EPR) measurements of the dopant solutions, the dopant plus host solutions from which thin films are spin-coated, and the resulting solid films. After correction for some trace impurities in the solutions, the spin density incorporated into the solid films is linearly proportional to the added dopant density. Nevertheless, the film conductivity increases superlinearly with dopant concentration. Although neither pure dopant nor host aggregate in solution, they aggregate when combined. This is presumably a result of the delocalization of the dopant electron over a number of host molecules. Angle-dependent EPR measurements on thin films suggest that the g-tensor symmetry axis is close to the pi-pi stacking axis, consistent with relatively delocalized electrons in this crystal direction. Nevertheless, most electrons are not entirely free, but still bound in the vicinity of the dopant cation by Coulomb attraction. At low concentration, dopants appear to segregate primarily to crystallite grain boundaries, while at higher concentration they are incorporated into the bulk of the crystallites. About half of the spins are paired in the solid at room temperature, and more at lower temperature.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
Univ Denver, Dept Chem & Biochem, Denver, CO 80208 USA.
Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA.
Metropolitan State Coll, Dept Chem, Denver, CO 80204 USA.
RP Gregg, BA (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM brian_gregg@nrel.gov
OI Eaton, Sandra S/0000-0002-2731-7986
NR 38
TC 30
Z9 30
U1 5
U2 26
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 NOV 11
PY 2004
VL 108
IS 45
BP 17329
EP 17336
DI 10.1021/jp049628c
PG 8
WC Chemistry, Physical
SC Chemistry
GA 869OM
UT WOS:000224993900012
ER
PT J
AU Wang, W
Gu, BH
Liang, LY
Hamilton, WA
AF Wang, W
Gu, BH
Liang, LY
Hamilton, WA
TI Adsorption and structural arrangement of cetyltrimethylammonium cations
at the silica nanoparticle-water interface
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID SURFACTANT ADSORPTION; BROMIDE; ADSOLUBILIZATION; PARTICLES; CHARGE;
LAYER; 1,2-DIPALMITOYL-SN-GLYCERO-3-PHOSPHOCHOLINE; COADSORPTION;
SPECTROSCOPY; ORGANIZATION
AB Although the sorption of cetyltrimethylammonium ion (CTA(+)) on silica NOD surfaces has been studied extensively, little is known about the interactions between large surfactant molecules and nanosized colloidal particles with a high specific surface area. The aim of the study was to understand the effects of structural arrangements of sorbed CTA(+) ions on the stability and surface properties of SiO2 nanoparticles. The extent of the effect of CTA(+) sorption on the aggregation behavior of the SiO2 nanoparticle suspension was investigated with the dynamic light scattering (DLS) technique. Both the Fourier transform infrared (FTIR) and Raman spectroscopic techniques were used to probe the sorbed layers of CTA(+) on silica surfaces. Results indicate that, at a low surface coverage (less than a monolayer), CTA(+) molecules were strongly bound to the SiO2 surface via their trimethylammonium headgroups. A bilayer sorption of CTA(+) was observed at a high surface coverage, and the sorption is attributed to the hydrophobic interactions between aliphatic tails of CTA(+). Sorption of CTA(+) at a low surface coverage also caused the destabilization of the SiO2 nanoparticle dispersion as a result of surface charge neutralization, but redispersion and surface charge reversal of SiO2 colloids occurred at a high surface coverage. The present study thus confirms the adsorption mechanism of the reverse orientation model and contributes to a better understanding of the sorption and structural arrangements of sorbed surfactants at the SiO2 nanoparticle-water interface.
C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA.
Cardiff Univ, Sch Engn, Cardiff CF24 0YF, S Glam, Wales.
RP Wang, W (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA.
EM wangw@ornl.gov
RI Wang, Wei/B-5924-2012; Gu, Baohua/B-9511-2012; Liang, Liyuan/O-7213-2014
OI Gu, Baohua/0000-0002-7299-2956; Liang, Liyuan/0000-0003-1338-0324
NR 44
TC 51
Z9 52
U1 7
U2 37
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 NOV 11
PY 2004
VL 108
IS 45
BP 17477
EP 17483
DI 10.1021/jp048325f
PG 7
WC Chemistry, Physical
SC Chemistry
GA 869OM
UT WOS:000224993900031
ER
PT J
AU Oelgoetz, J
Pradhan, AK
AF Oelgoetz, J
Pradhan, AK
TI The 6.7-keV K alpha complex of He-like iron in transient plasmas
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE atomic data; atomic processes; line : profiles; galaxies : Seyfert;
X-rays : galaxies
ID HELIUM-LIKE IONS; ELECTRON-IMPACT EXCITATION; X-RAY-SPECTRUM;
DIELECTRONIC SATELLITE SPECTRA; ACTIVE GALACTIC NUCLEI; HEATED TOKAMAK
PLASMAS; HIGHLY-CHARGED IONS; LINE-INTENSITIES; CROSS-SECTIONS; FE-XXV
AB Time-dependent numerical simulations of the K complex of Fe XXV are carried out as a function of temperature-density-radiation field variations in high-temperature astrophysical and laboratory plasmas. In addition to several well-known features, the transient and steady-state spectra reveal the effects due to (a) time-dependent thermal and non-thermal radiation fields, (b) photo- and collisional excitation and ionization, and (c) high densities, on the 'quartet' of principal w, x, y, z lines, and dielectronic satellites. The highly detailed models show precisely how, assuming a temporal-temperature correlation, the X-ray intensity varies between 6.6 and 6.7 keV and undergoes a 'spectral inversion' in the w and z line intensities, characterizing an ionization- or a recombination-dominated plasma. The dielectronic satellite intensities are the most temperature-dependent features, but insensitive to density variations, and significantly contribute to the K complex for T < 6.7 keV leading to asymmetric profiles. The 6.7-keV K complex should be a potential diagnostic of X-ray flares in active galactic nuclei, afterglows in gamma-ray bursts, and other non-equilibrium sources with the high-resolution measurements possible from the upcoming mission Astro-E2. It is also shown that high electron densities attenuate the line intensities in simulations relevant to laboratory plasmas, such as in inertial confinement fusion, laser, or magnetic Z-pinch devices.
C1 Los Alamos Natl Lab, GRA Program, Los Alamos, NM 87545 USA.
Ohio State Univ, Dept Chem, Columbus, OH 43210 USA.
Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
RP Oelgoetz, J (reprint author), Los Alamos Natl Lab, GRA Program, X-5, Los Alamos, NM 87545 USA.
EM oelgoetz.1@osu.edu
NR 53
TC 20
Z9 20
U1 0
U2 1
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD NOV 11
PY 2004
VL 354
IS 4
BP 1093
EP 1102
DI 10.1111/j.1365-2966.2004.08269.x
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 868OJ
UT WOS:000224922600016
ER
PT J
AU Rimjaem, S
Farias, R
Thongbai, C
Vilaithong, T
Wiedemann, H
AF Rimjaem, S
Farias, R
Thongbai, C
Vilaithong, T
Wiedemann, H
TI Femtosecond electron bunches from an RF-gun
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE fs electron pulses; fs X-ray pulses; far infrared radiation; electron
source; RF-gun
ID COHERENT SYNCHROTRON RADIATION; PULSES; DIFFRACTION
AB Sub-picosecond electron-pulses become a tool of increasing importance to study dynamics at an atomic level. Such electron pulses can be used directly or be converted into intense coherent far infrared radiation or equally short X-ray pulses. In principle, sub-picosecond electron pulses can be obtained in large, high-energy electron linear accelerator systems by repeatedly applying an energy slew and magnetic compression. Another process is the production of short electron pulses at low energies from an RF-gun with a thermionic cathode together with a bunch compressing alpha-magnet. In this paper, we present a systematic analysis of capabilities and limits of sub-picosecond electron pulses from such a source. We discuss particular parameter choices as well as the impact of geometric and electric specifications on the 6-dimensional phase space electron distribution. Numerical beam simulations with the computer code PARMELA are performed including effects and limitations due to space charge forces. While the production of femtosecond electron bunches is of primary concern, we also consider the preservation of such short bunches along a beam transport line. (C) 2004 Elsevier B.V. All rights reserved.
C1 Chiang Mai Univ, Dept Phys, Fast Neutron Res Facil, Chiang Mai 50202, Thailand.
Lab Natl Luz Sincrotron, Campinas, SP, Brazil.
Stanford Univ, SLAC, SSRL, Stanford, CA USA.
RP Rimjaem, S (reprint author), Chiang Mai Univ, Dept Phys, Fast Neutron Res Facil, POB 217, Chiang Mai 50202, Thailand.
EM neung@fnrf.science.cmu.ac.th
NR 18
TC 25
Z9 25
U1 1
U2 7
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 11
PY 2004
VL 533
IS 3
BP 258
EP 269
DI 10.1016/j.nima.2004.05.135
PG 12
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 869PJ
UT WOS:000224996200003
ER
PT J
AU Gao, J
AF Gao, J
TI Emittance growth and beam lifetime limitations due to beam-beam effects
in e(+)e(-) storage ring colliders
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE storage ring colliders; beam-beam effects
AB In this paper we give analytical expressions for the maximum beam-beam parameter and related beam-beam limited beam lifetime in e(+)e(-) storage ring colliders. The performances of some existing or existed machines are analyzed. (C) 2004 Elsevier B.V. All rights reserved.
C1 CNRS, Lab Accelerateur Lineaire, IN2P3, F-91898 Orsay, France.
Univ Paris 11, F-91898 Orsay, France.
Stanford Univ, Stanford Linear Accelerator Ctr, Menlo Pk, CA 94039 USA.
RP Gao, J (reprint author), CNRS, Lab Accelerateur Lineaire, IN2P3, BP 34, F-91898 Orsay, France.
EM gao@lal.in2p3.fr
NR 7
TC 6
Z9 6
U1 1
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD NOV 11
PY 2004
VL 533
IS 3
BP 270
EP 274
DI 10.1016/j.nima.2004.06.137
PG 5
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 869PJ
UT WOS:000224996200004
ER
PT J
AU Cooper, JR
Bernstein, L
McMahon, MA
Powell, J
Wutte, D
Ahle, L
Benczer-Koller, N
Dashdorj, D
Kumbartzki, G
Mertzimekis, TJ
Schiller, A
Silver, C
Taylor, MJ
AF Cooper, JR
Bernstein, L
McMahon, MA
Powell, J
Wutte, D
Ahle, L
Benczer-Koller, N
Dashdorj, D
Kumbartzki, G
Mertzimekis, TJ
Schiller, A
Silver, C
Taylor, MJ
TI Production of a Kr-76 radioactive ion beam using a batch mode method
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
DE radioactive heavy ion beam; Kr-76; Se-74; batch mode; Re-cyclotron; gas
transfer system
AB A batch mode process has been developed to produce a Kr-76 (T-1/2 = 14.8 h) radioactive ion beam at the Lawrence Berkeley National Laboratory 88-in. Cyclotron. First, a 6 particle muA alpha beam is run for 17 h to produce approximately 10(14) Kr-76 atoms via the reaction Se-74(alpha, 2n)Kr-76. Then, the krypton is separated from the target material and injected into the AECR-U ion source. Beam intensities as high as 3 x 10(8) particles per second are observed with an integrated beam current of 6(2) x 10(11) particles per 24-h batch cycle. (C) 2004 Published by Elsevier B.V.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
Rutgers State Univ, New Brunswick, NJ 08903 USA.
Univ N Carolina, Chapel Hill, NC 27599 USA.
Michigan State Univ, E Lansing, MI 48824 USA.
Univ Brighton, Brighton BN2 4AT, E Sussex, England.
RP Cooper, JR (reprint author), 234 Clark Dr, Circleville, OH 43113 USA.
EM coops_jrc@yahoo.com
RI Taylor, Michael/N-1725-2015
OI Taylor, Michael/0000-0002-8718-3684
NR 9
TC 1
Z9 1
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 NOV 11
PY 2004
VL 533
IS 3
BP 287
EP 294
DI 10.1016/j.nima.2004.06.151
PG 8
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 869PJ
UT WOS:000224996200007
ER
PT J
AU Grinstein, B
Ligeti, Z
AF Grinstein, B
Ligeti, Z
TI Heavy quark symmetry in B -> D((*))l(nu)over-bar spectra (vol 526, pg
345, 2004)
SO PHYSICS LETTERS B
LA English
DT Correction
C1 Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Grinstein, B (reprint author), Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
EM zligeti@lbl.gov
RI Grinstein, Benjamin/H-5777-2015
OI Grinstein, Benjamin/0000-0003-2447-4756
NR 3
TC 4
Z9 4
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 NOV 11
PY 2004
VL 601
IS 3-4
BP 236
EP 237
DI 10.1016/j.physletb.2004.09.060
PG 2
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 868PV
UT WOS:000224926400018
ER
PT J
AU Westcott, SA
Marder, TB
Baker, RT
Harlow, RL
Calabrese, JC
Lam, KC
Lin, ZY
AF Westcott, SA
Marder, TB
Baker, RT
Harlow, RL
Calabrese, JC
Lam, KC
Lin, ZY
TI Reactions of hydroborating reagents with phosphinorhodium hydride
complexes: molecular structures of a Rh2B3 metallaborane cluster, an
L2Rh(eta(2)-H2BR2) complex and a mixed valence Rh dimer containing a
semi-bridging Bcat (cat=1,2-O2C6H4) group
SO POLYHEDRON
LA English
DT Article
DE rhodium hydrides; bridging boryls; catalyzed hydroborations
ID TRANSITION-METAL-COMPLEXES; CATALYZED HYDROBORATIONS; CRYSTAL-STRUCTURE;
OXIDATIVE ADDITION; BORYL COMPLEXES; X-RAY; RHODIUM; BORON; REACTIVITY;
ALKENES
AB The formation of products derived from competing reactions in Rh-catalyzed alkene hydroborations prompted us to study in situ interactions of several hydroborating reagents with unsaturated phosphinorhodium complexes. The reaction of [Rh(mu-H)(DiPPE)](2) (1) with borane-dimethylsulfide gave several rhodium-boron containing products including the structurally characterized metallaborane [RhH(DiPPE)](2)B3H7 (2) [DiPPE = 1,2-bis(diisopropylphosphino)ethane]. Addition of thexylborane and 9-H-BBN dimers, containing alkyl groups, to 1 gave the corresponding mononuclear substituted borohydride complexes Rh(eta(2)-H2BRR')(DiPPE) (4: R=H, R' = C(CH3)(2)CH(CH3)(2); 5: R,R'=bicyclo-[3.3.1]-nonane [C8H14]). The analogous monodentate phosphine complex Rh(eta(2)- H2BC8H14)(PPr'(3))(2) (6) was isolated and structurally characterized. Addition of catecholborane (HBcat; cat = 1,2-O2C6H4) to 1 gave the unusual dinuclear species Rh(DiPPE)(mu-H)(2)(mu-Bcat)RhH(DiPPE) (7) containing a semi-bridging Beat group, confirmed by single-crystal X-ray diffraction, and zwitterionic Rh(eta(6) -catBcat)(DiPPE) (8). Implications for rhodium-catalyzed hydroborations are addressed. (C) 2004 Elsevier Ltd. All rights reserved.
C1 Mt Allison Univ, Dept Chem, Sackville, NB E4L 1G8, Canada.
Univ Durham, Dept Chem, Durham DH1 3LE, England.
Los Alamos Natl Lab, Chem Sci & Technol Div, Los Alamos, NM 87545 USA.
DuPont Co Inc, Expt Stn, Cent Res & Dev, Sci & Engn Labs, Wilmington, DE 19880 USA.
Hong Kong Univ Sci & Technol, Inst Mol Technol Drug Discovery & Synthesis, Dept Chem, Kowloon, Hong Kong, Peoples R China.
Hong Kong Univ Sci & Technol, Inst Mol Technol Drug Discovery & Synthesis, Open Lab Chirotechnol, Kowloon, Hong Kong, Peoples R China.
RP Westcott, SA (reprint author), Mt Allison Univ, Dept Chem, 63C York St, Sackville, NB E4L 1G8, Canada.
EM swestcott@mta.ca
OI Lin, Zhenyang/0000-0003-4104-8767
NR 60
TC 52
Z9 52
U1 1
U2 11
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0277-5387
J9 POLYHEDRON
JI Polyhedron
PD NOV 11
PY 2004
VL 23
IS 17
BP 2665
EP 2677
DI 10.1016/j.poly.2004.05.012
PG 13
WC Chemistry, Inorganic & Nuclear; Crystallography
SC Chemistry; Crystallography
GA 877VT
UT WOS:000225603100011
ER
PT J
AU Inyushin, S
Shafir, A
Sheats, JE
Minihane, M
Whitten, CE
Arnold, J
AF Inyushin, S
Shafir, A
Sheats, JE
Minihane, M
Whitten, CE
Arnold, J
TI Synthesis and X-ray structures of metallocenium diamines of iron and
cobalt
SO POLYHEDRON
LA English
DT Article
DE metallocene; ferrocenium; cobaltocenium; crystal structure
ID METAL COORDINATION CHEMISTRY; ZIRCONIUM COMPLEXES; COBALTICINIUM SALTS;
LIGANDS; 1,1'-DIAMINOFERROCENE; DERIVATIVES; TI; FAMILY; ZR
AB A detailed, reproducible synthesis of 1,1'-diaminocobaltocenium hexafluorophosphate is provided. The compound can be made on gram scales in several steps starting from 1,1'-dimethylcobaltocenium salts. The X-ray structures of 1,1'-diaminocobaltocenium hexalluorophosphate and a related 1,1'-diaminoferrocenium salt, are described. (C) 2004 Elsevier Ltd. All rights reserved.
C1 Rider Univ, Dept Chem, Lawrenceville, NJ 08648 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
Bowdoin Coll, Dept Chem, Brunswick, ME 04011 USA.
Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
RP Arnold, J (reprint author), Rider Univ, Dept Chem, Lawrenceville, NJ 08648 USA.
EM arnold@berkeley.edu
RI Shafir, Alexandr/D-1676-2009; Arnold, John/F-3963-2012
OI Shafir, Alexandr/0000-0002-8127-2299; Arnold, John/0000-0001-9671-227X
NR 25
TC 9
Z9 9
U1 0
U2 9
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0277-5387
J9 POLYHEDRON
JI Polyhedron
PD NOV 11
PY 2004
VL 23
IS 17
BP 2937
EP 2942
DI 10.1016/j.poly.2004.08.012
PG 6
WC Chemistry, Inorganic & Nuclear; Crystallography
SC Chemistry; Crystallography
GA 877VT
UT WOS:000225603100036
ER
PT J
AU Corkey, BK
Taw, FL
Bergman, RG
Brookhart, M
AF Corkey, BK
Taw, FL
Bergman, RG
Brookhart, M
TI Aromatic and aldehyde carbon-hydrogen bond activation at cationic
Rh(III) centers. Evaluation of electronic substituent effects on
aldehyde binding and C-H oxidative addition
SO POLYHEDRON
LA English
DT Article
DE C-H bond activation; rhodium(III); benzene activation; aldehyde
activation
ID SELECTIVE CATALYTIC DEHYDROGENATION; SATURATED-HYDROCARBONS;
INTERMOLECULAR ACTIVATION; ALKANE DEHYDROGENATION; SOLVENT PURIFICATION;
IRIDIUM COMPLEXES; IR(III) COMPLEXES; MECHANISM; SYSTEM; ARENE
AB Cationic rhodium methyl complexes, [Cp-*(PMe3)Rh(Me)(CH2Cl2)]BAr4' (1) and [Cp-*(P(OMe)(3))Rh(Me)(CH2Cl2)]BAr4' (3), react with benzene to yield the corresponding phenyl complexes, [Cp-*(PMe3)Rh(Ph)(CH2Cl2)]BAr4' (6) and [Cp-*(P(OMe)(3))Rh(Ph)(CH2Cl2)]BAr4' (7). First-order rate constants observed in 1.1 M benzene in CD2Cl2 at 25 degreesC are (2.1 +/- 0.2) x 10(-5) s(-1) and (1.9 +/- 0.2) x 10(-5) s(-1), respectively. Reactions of 1 and 3 with p-X-substituted benzaldehydes (X = -CF3, -CH3, and -OMe) initially produce the sigma-aldehyde adducts, [Cp-*(L)Rh(Me)(p-XC6H4CHO)]BAr4' (L = PMe3 (15), P(OMe)(3) (16)). Exchange of free with bound aldehyde occurs via a dissociative process and quantitative NMR rate measurements show that complexes of 1 exchange faster than those of 3 and that less basic aldehydes exchange faster than more basic aldehydes (p-CF3C6H4CHO > p-CH3C6H4CHO > p-CH3OC6H4CHO). The aldehyde adducts undergo C-H bond activation to produce initially methane plus acyl aldehyde adducts, [Cp-*(L)Rh(C(O)C6H4X)(p - XC6H4CHO)]BAr4' (L = PMe3 (17), P(OMe)(3) (18)). Rates of C-H activation are correlated with aldehyde exchange rates; activation barriers of weakly bound aldehydes are lower than more strongly bound aldehydes. In the case of L = PMe3, decarbonylation of the aldehyde adducts occurs cleanly to form aryl carbonyl complexes, [Cp-*(PMe3)Rh(C6H4X)(CO)]BAr4'. For L = P(OMe)(3), decarbonylation is a more complicated process; some intermediates and products have been identified by NMR spectroscopy. (C) 2004 Elsevier Ltd. All rights reserved.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA.
RP Bergman, RG (reprint author), Los Alamos Natl Lab, Dept Chem, POB 1663,Mailstop J514, Los Alamos, NM USA.
EM ftaw@lanl.gov
NR 35
TC 29
Z9 29
U1 2
U2 14
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0277-5387
J9 POLYHEDRON
JI Polyhedron
PD NOV 11
PY 2004
VL 23
IS 17
BP 2943
EP 2954
DI 10.1016/j.poly.2004.09.005
PG 12
WC Chemistry, Inorganic & Nuclear; Crystallography
SC Chemistry; Crystallography
GA 877VT
UT WOS:000225603100037
ER
PT J
AU Tortora, PR
Ceccio, SL
Trujillo, SM
O'Hern, TJ
Shollenberger, KA
AF Tortora, PR
Ceccio, SL
Trujillo, SM
O'Hern, TJ
Shollenberger, KA
TI Capacitance measurements of solid concentration in gas-solid flows
SO POWDER TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT Annual Meeting of the AIChE
CY NOV 03-08, 2002
CL Indianapolis, IN
SP AIChE
DE capacitance measurements; gas-solid flows; solid concentration
ID ELECTRICAL-IMPEDANCE TOMOGRAPHY
AB Several methods of solid concentration measurement were implemented in a gas-solid multiphase flow to validate an electrically based solid concentration measurement device called a bulk impedance ring. Spatially averaged gamma-densitometry tomography and differential pressure measurements are compared and contrasted with the electrically based method. Experiments were performed on the riser of a pilot-scale circulating fluidized bed at Sandia National Laboratories, which circulates equilibrium fluid catalytic cracking particles with air.
It was found that the mixture model used to convert the electrical impedance obtained by the bulk impedance ring to solid concentration must be applied carefully. Use of the Maxwell-Hewitt relation requires that the continuous and dispersed phases in the multiphase flow be identified correctly for the mixture model to work.
Temporally averaged solid concentrations obtained from gamma-densitometry tomography and differential pressure measurements agree with solid concentrations obtained from the bulk impedance ring. Temporally resolved data from the bulk impedance ring and differential pressure measurements show good correlation. These results have validated the bulk impedance ring and show the feasibility of building a multiple-electrode electrical-iinpedance tomography system. (C) 2004 Elsevier B.V. All rights reserved.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Tortora, PR (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM prtorto@sandia.gov
NR 8
TC 9
Z9 11
U1 2
U2 5
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0032-5910
J9 POWDER TECHNOL
JI Powder Technol.
PD NOV 11
PY 2004
VL 148
IS 2-3
BP 92
EP 101
DI 10.1016/j.powtec.2004.09.002
PG 10
WC Engineering, Chemical
SC Engineering
GA 884BT
UT WOS:000226060300003
ER
PT J
AU Kjornrattanawanich, B
Bajt, SA
AF Kjornrattanawanich, B
Bajt, SA
TI Structural characterization and lifetime stability of Mo/Y
extreme-ultraviolet multilayer mirrors
SO APPLIED OPTICS
LA English
DT Article
AB We have observed a dramatic dependence of the extreme ultraviolet (EUV) reflectivity of Mo/Y multilayers on the oxygen content of yttrium. This is explained as being due to a change in the microstructure and an increase in roughness of the yttrium layers and not just to an increase in absorption owing to the amount of oxygen within the yttrium layers. We found that the best reflectivity of 38.4% was achieved with an oxygen content of 25%, which was reduced to 32.6% and 29.6% for multilayers manufactured from oxygen-free yttrium and 39%-oxygen yttrium, respectively. These results highlight the importance of including experimentally determined optical constants as well as interface roughness in multilayer calculations. In addition, the lifetime stability of Mo/Y multilayers with different capping layers was monitored for 1 year. The molybdenum- and palladium-capped samples exhibited low surface roughness and similar to4% relative reflectivity loss in 1 year. The relative reflectivity loss of the yttrium-capped sample (yttrium with 39% oxygen) was similar to8%. However, the reflectivity loss in all three capping layers occurred within the first 100 days after the deposition, and the reflectivity remained stable afterward.
C1 Univ Space Res Assoc, Natl Synchrotron Light Source Beamline X24C, Brookhaven Natl Lab, Upton, NY 11973 USA.
Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA.
RP Kjornrattanawanich, B (reprint author), Univ Space Res Assoc, Natl Synchrotron Light Source Beamline X24C, Brookhaven Natl Lab, Upton, NY 11973 USA.
EM benjawan@bnl.gov
RI Bajt, Sasa/G-2228-2010
NR 9
TC 13
Z9 13
U1 1
U2 5
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD NOV 10
PY 2004
VL 43
IS 32
BP 5955
EP 5962
DI 10.1364/AO.43.005955
PG 8
WC Optics
SC Optics
GA 871OV
UT WOS:000225144000006
PM 15587723
ER
PT J
AU Murray, SD
Lin, DNC
AF Murray, SD
Lin, DNC
TI Energy dissipation in multiphase infalling clouds in galaxy halos
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies : formation; galaxies : halos; galaxies : ISM
ID HIGH-VELOCITY CLOUDS; COLD DARK-MATTER; X-RAY-EMISSION; PROTOGALACTIC
CLOUDS; THERMAL-INSTABILITY; ALPHA CLOUDS; EVOLUTION; CLUSTERS
AB During the epoch of large galaxy formation, thermal instability leads to the formation of a population of cool fragments that are embedded within a background of tenuous hot gas. The hot gas attains a quasi-hydrostatic equilibrium. Although the cool clouds are pressure confined by the hot gas, they fall into the galactic potential, and their motion is subject to drag from the hot gas. The release of gravitational energy due to the infall of the cool clouds is first converted into their kinetic energy and is subsequently dissipated as heat. The cool clouds therefore represent a potentially significant energy source for the background hot gas, depending on the ratio of thermal energy deposited within the clouds versus the hot gas. In this paper, we show that most of the dissipated energy is deposited in the tenuous hot halo gas, providing a source of internal energy to replenish losses in the hot gas through bremsstrahlung emission and conduction into the cool clouds. The heating from the motion of the cool clouds allows the multiphase structure of the interstellar medium to be maintained.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
RP Murray, SD (reprint author), Lawrence Livermore Natl Lab, L-22,POB 808, Livermore, CA 94550 USA.
RI Murray, Stephen/I-8685-2016
OI Murray, Stephen/0000-0001-5597-090X
NR 27
TC 23
Z9 24
U1 0
U2 1
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 NOV 10
PY 2004
VL 615
IS 2
BP 586
EP 594
DI 10.1086/424658
PN 1
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 870GT
UT WOS:000225046300002
ER
PT J
AU Huterer, D
Kim, A
Krauss, LM
Broderick, T
AF Huterer, D
Kim, A
Krauss, LM
Broderick, T
TI Redshift accuracy requirements for future supernova and number count
surveys
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE cosmological parameters; cosmology : theory; large-scale structure of
universe; supernovae : general
ID HUBBLE-SPACE-TELESCOPE; GALAXY CLUSTER SURVEYS; COSMOLOGICAL PARAMETERS;
PHOTOMETRIC REDSHIFTS; DARK ENERGY; POWER SPECTRUM; CONSTRAINTS;
UNIVERSE; CONSTANT; EVOLUTION
AB We investigate the redshift accuracy of Type Ia supernova and cluster number count surveys required for the redshift uncertainties not to contribute appreciably to the dark energy parameter error budget. For the Supernova/ Acceleration Probe experiment, we find that without the assistance of ground-based measurements individual supernova redshifts would need to be determined to about 0.002 or better, a challenging but feasible requirement for a low-resolution spectrograph. However, we find that accurate redshifts for z < 0.1 supernovae obtained with ground-based experiments are sufficient to protect the results against even relatively large redshift errors at high z. For the future cluster number count surveys such as with the South Pole Telescope, Planck, or DUET, we find that the purely statistical error in the photometric redshift is less important and that the irreducible systematic bias in redshift drives the requirements. The redshift bias must be kept below 0.001 - 0.005 per redshift bin ( which is determined by the filter set), depending on the sky coverage and details of the definition of the minimal mass of the survey. Furthermore, we find that X-ray surveys have a more stringent required redshift accuracy than Sunyaev-Zeldovich (SZ) effect surveys since they use a shorter lever arm in redshift; conversely, SZ surveys benefit from their high-redshift reach only as long as some redshift information is available for distant (z&GSIM;1) clusters.
C1 Case Western Reserve Univ, Dept Phys, Cleveland, OH 44106 USA.
Case Western Reserve Univ, Ctr Educ & Res Cosmol & Astrophys, Cleveland, OH 44106 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Phys Sci, Berkeley, CA 94720 USA.
Case Western Reserve Univ, Dept Astron, Cleveland, OH 44106 USA.
Laurel High Sch, Cleveland, OH 44106 USA.
RP Huterer, D (reprint author), Case Western Reserve Univ, Dept Phys, Cleveland, OH 44106 USA.
NR 49
TC 28
Z9 28
U1 0
U2 1
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 NOV 10
PY 2004
VL 615
IS 2
BP 595
EP 602
DI 10.1086/424726
PN 1
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 870GT
UT WOS:000225046300003
ER
PT J
AU Hwang, U
Laming, JM
Badenes, C
Berendse, F
Blondin, J
Cioffi, D
DeLaney, T
Dewey, D
Fesen, R
Flanagan, KA
Fryer, CL
Ghavamian, P
Hughes, JP
Morse, JA
Plucinsky, PP
Petre, R
Pohl, M
Rudnick, L
Sankrit, R
Slane, PO
Smith, RK
Vink, J
Warren, JS
AF Hwang, U
Laming, JM
Badenes, C
Berendse, F
Blondin, J
Cioffi, D
DeLaney, T
Dewey, D
Fesen, R
Flanagan, KA
Fryer, CL
Ghavamian, P
Hughes, JP
Morse, JA
Plucinsky, PP
Petre, R
Pohl, M
Rudnick, L
Sankrit, R
Slane, PO
Smith, RK
Vink, J
Warren, JS
TI A million second Chandra view of Cassiopeia A
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE supernova remnants; supernovae : general; X-rays : individual
(Cassiopeia A); X-rays : ISM
ID GAMMA-RAY BURSTS; X-RAY; CAS-A; EXPANSION; COLLAPSE; EJECTA; CORE;
NUCLEOSYNTHESIS; PROGENITORS; SUPERNOVAE
AB We introduce a million second observation of the supernova remnant Cassiopeia A with the Chandra X-Ray Observatory. The bipolar structure of the Si-rich ejecta (northeast jet and southwest counterpart) is clearly evident in the new images, and their chemical similarity is confirmed by their spectra. These are most likely due to jets of ejecta as opposed to cavities in the circumstellar medium, since we can reject simple models for the latter. The properties of these jets and the Fe-rich ejecta will provide clues to the explosion of Cas A.
C1 NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
Univ Maryland, College Pk, MD 20742 USA.
USN, Res Lab, Washington, DC 20375 USA.
Inst Estudis Espacials Catalunya, E-08034 Barcelona, Spain.
USN, Res Lab, Washington, DC 20375 USA.
N Carolina State Univ, Raleigh, NC 27695 USA.
George Washington Univ, Washington, DC 20052 USA.
Univ Minnesota, Minneapolis, MN 55455 USA.
MIT, Ctr Space Res, Cambridge, MA 02139 USA.
Dartmouth Coll, Hanover, NH 03755 USA.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
Johns Hopkins Univ, Baltimore, MD 21218 USA.
Rutgers State Univ, Piscataway, NJ 08854 USA.
Arizona State Univ, Tempe, AZ 85287 USA.
Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
Iowa State Univ, Ames, IA 50011 USA.
SRON, Natl Inst Space Res, NL-3584 CA Utrecht, Netherlands.
RP Hwang, U (reprint author), NASA, Goddard Space Flight Ctr, Code 662, Greenbelt, MD 20771 USA.
EM hwang@milkyway.gsfc.nasa.gov; jlaming@ssd5.nrl.navy.mil;
badenes@ieec.fcr.es; fberendse@ssd5.nrl.navy.mil; john_blondin@ncsu.edu;
professor@cioffi.us; tdelaney@astro.umn.edu; dd@space.mit.edu;
fesen@snr.dartmouth.edu; kaf@space.mit.edu; fryer@lanl.gov;
parviz@pha.jhu.edu; jackph@physics.rutgers.edu; jon.morse@asu.edu;
plucinsk@head.cfa.harvard.edu; rob@milkyway.gsfc.nasa.gov;
mkp@iastate.edu; larry@astro.umn.edu; ravi@pha.jhu.edu;
slane@head.cfa.harvard.edu; rsmith@milkyway.gsfc.nasa.gov;
j.vink@sron.nl; jesawyer@physics.rutgers.edu
NR 29
TC 117
Z9 118
U1 0
U2 1
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 NOV 10
PY 2004
VL 615
IS 2
BP L117
EP L120
DI 10.1086/426186
PN 2
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 870GW
UT WOS:000225046600014
ER
PT J
AU Smolcic, V
Ivezic, Z
Knapp, GR
Lupton, RH
Pavlovski, K
Ilijic, S
Schlegel, D
Smith, JA
McGehee, PM
Silvestri, NM
Hawley, SL
Rockosi, C
Gunn, JE
Strauss, MA
Fan, XH
Eisenstein, D
Harris, H
AF Smolcic, V
Ivezic, Z
Knapp, GR
Lupton, RH
Pavlovski, K
Ilijic, S
Schlegel, D
Smith, JA
McGehee, PM
Silvestri, NM
Hawley, SL
Rockosi, C
Gunn, JE
Strauss, MA
Fan, XH
Eisenstein, D
Harris, H
TI A second stellar color locus: A bridge from white dwarfs to M stars
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE binaries : general; Galaxy : stellar content; stars : statistics; white
dwarfs
ID DIGITAL SKY SURVEY; 1ST DATA RELEASE; SYSTEM
AB We report the discovery of a locus of binary stars in the Sloan Digital Sky Survey ( SDSS) g-r versus u-g color- color diagram that connects the colors of white dwarfs and M dwarfs. While its contrast with respect to the main stellar locus is only similar to 1 : 2300, this previously unrecognized feature includes 863 stars from the SDSS Data Release 1 ( DR1). The position and shape of the feature are in good agreement with predictions of a simple binary star model that consists of a white dwarf and an M dwarf, with the components' luminosity ratio controlling the position along this binary system locus. SDSS DR1 spectra for 47 of these objects strongly support this model. The absolute magnitude - color distribution inferred for the white dwarf component is in good agreement with the models of Bergeron et al.
C1 Princeton Univ Observ, Princeton, NJ 08544 USA.
Univ Zagreb, Dept Phys, Zagreb 10000, Croatia.
Inst Appl Phys, Zagreb 10000, Croatia.
Univ Wyoming, Dept Phys & Astron, Laramie, WY 82071 USA.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA.
Univ Washington, Dept Astron, Seattle, WA 98195 USA.
Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
USN Observ, Flagstaff Stn, Flagstaff, AZ 86002 USA.
RP Smolcic, V (reprint author), Princeton Univ Observ, Peyton Hall, Princeton, NJ 08544 USA.
OI Smith, J. Allyn/0000-0002-6261-4601
NR 19
TC 66
Z9 66
U1 1
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 NOV 10
PY 2004
VL 615
IS 2
BP L141
EP L144
DI 10.1086/426475
PN 2
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 870GW
UT WOS:000225046600020
ER
PT J
AU Rengifo, F
Saez, AE
Ela, WP
Quach, A
Garbo, B
Franks, C
Zelinski, BJJ
Birnie, DP
Smith, HD
Smith, GL
AF Rengifo, F
Saez, AE
Ela, WP
Quach, A
Garbo, B
Franks, C
Zelinski, BJJ
Birnie, DP
Smith, HD
Smith, GL
TI Microstructure and leaching behavior of polymer composites for
encapsulating toxic solid wastes
SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
LA English
DT Article
ID MICROSCOPY
AB This work presents a water-based process for the manufacture of a polymeric waste form for the encapsulation of soluble toxic salts. The process is based on the elaboration of an aqueous emulsion in which polymeric precursors are mixed with the waste. Upon drying and curing, the emulsion inverts to form a waste form with mechanical integrity that stabilizes the toxic salt. The final polymer matrix is a mixture of an epoxy resin and poly(styrene butadiene) (PSB). Sodium nitrate was used as a model salt waste. The microstructure and composition of the samples were examined using scanning electron microscopy, osmium tetroxide staining, and salt extraction. The results show that the epoxy resin is dispersed in a continuous PSB phase, and the encapsulated salt is distributed throughout the matrix. Leaching tests were carried out by exposing sections of the waste forms to large volumes of well-stirred water. The measured time dependence of the leaching process is described quantitatively by a model based on the diffusion of the salt through the waste form. Effective diffusivities of the salt in the polymeric matrix ranged between 10(-8) and 10(-7) cm(2)/s. The results suggest that diffusion occurs through limited but significant continuous porosity.
C1 Univ Arizona, Dept Chem & Environm Engn, Tucson, AZ 85721 USA.
Univ Arizona, Dept Mat Sci & Engn, Tucson, AZ 85721 USA.
Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Saez, AE (reprint author), Univ Arizona, Dept Chem & Environm Engn, Tucson, AZ 85721 USA.
EM esaez@engr.arizona.edu
RI Saez, Avelino/K-1136-2016;
OI Saez, Avelino/0000-0002-3548-6325; Birnie, Dunbar/0000-0001-6044-2300
NR 14
TC 3
Z9 3
U1 0
U2 3
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 NOV 10
PY 2004
VL 43
IS 23
BP 7492
EP 7499
DI 10.1021/ie049561f
PG 8
WC Engineering, Chemical
SC Engineering
GA 869IW
UT WOS:000224977600031
ER
PT J
AU Chylek, P
Clodius, WB
Bender, SC
Atkins, WH
Balick, LK
AF Chylek, P
Clodius, WB
Bender, SC
Atkins, WH
Balick, LK
TI Sensitivity of near infrared total water vapour estimate to calibration
errors
SO INTERNATIONAL JOURNAL OF REMOTE SENSING
LA English
DT Article
ID DIFFERENTIAL ABSORPTION TECHNIQUE; RESOLUTION IMAGING SPECTROMETER;
PRECIPITABLE WATER; SPLIT-WINDOW; RETRIEVAL; AEROSOL; INSTRUMENT; LAND
AB Analysis of satellite data to estimate the precipitable water (also called the columnar water vapour) amount often leads to systematic errors in deduced precipitable water (PW). The causes of systematic errors are likely to be instrumental calibration errors rather than variability of atmospheric parameters. We use the MODTRAN 4.0 radiative transfer code to model effects of various calibration errors on the Multi-spectral Thermal Imager (MTI) daytime total water vapour estimate. From the considered sources of calibration errors (spectral band centre error, spectral bandwidth error and radiometric calibration error) the radiometric calibration error has the largest influence on the accuracy of total water vapour estimate. When the radiometric calibration error between 1% and 5% is combined with the estimated spectral band centre error of 1 nm and the bandwidth error of 0.5 nm, the total systematic error of the columnar water vapour estimate is expected to be between 8% and 26%. The accuracy of the retrieved PW using the MTI imagery over the NASA Stennis site and Oklahoma DOE (Department of Energy) ARM (Atmospheric Radiation Measurement program) site is about 17%, well within the estimated range due to calibration errors. A similarity between the MTI and the MODIS (Moderate Resolution Imaging Spectral-Radiometer) bands used for water vapour estimate suggests that a similar error analysis may be valid for the MODIS sensor. However, the narrow band instruments (with bandwidth around 10 nm) are much more sensitive to the band centre calibration error.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Chylek, P (reprint author), Los Alamos Natl Lab, ISR-2,Mail Stop B244, Los Alamos, NM 87545 USA.
EM chylek@lanl.gov
NR 28
TC 0
Z9 0
U1 0
U2 1
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0143-1161
J9 INT J REMOTE SENS
JI Int. J. Remote Sens.
PD NOV 10
PY 2004
VL 25
IS 21
BP 4457
EP 4470
DI 10.1080/01431160412331269742
PG 14
WC Remote Sensing; Imaging Science & Photographic Technology
SC Remote Sensing; Imaging Science & Photographic Technology
GA 873ZY
UT WOS:000225321900003
ER
PT J
AU Bozin, ES
Petkov, V
Barnes, PW
Woodward, PM
Vogt, T
Mahanti, SD
Billinge, SJL
AF Bozin, ES
Petkov, V
Barnes, PW
Woodward, PM
Vogt, T
Mahanti, SD
Billinge, SJL
TI Temperature dependent total scattering structural study of CaCu3Ti4O12
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article; Proceedings Paper
CT Workshop in Honor of Mike Thorpes 60th Birthday on Flexibility in
Complex Materials: Glasses, Amorphous and Proteins
CY AUG 07-10, 2004
CL St Adele, CANADA
ID HIGH-DIELECTRIC-CONSTANT; X-RAY; PROGRAM; PEROVSKITES; DIFFRACTION;
TITANATE; PHASES
AB X-ray and neutron powder diffraction data as a function of temperature are analysed for the colossal dielectric constant material CaCu3Ti4O12. The local structure is studied using atomic pair distribution function analysis. No evidence is found for enlarged oxygen or Ti displacement parameters suggesting that short range octahedral tilt disorder and off-centre Ti displacements are minimal. However, an unusual temperature dependence for the atomic displacement parameters of calcium and copper is observed. Temperature dependent modelling of the structure, using bond valence concepts, suggests that the calcium atoms become underbonded below approximately 260 K, which provides a rationale for the unusually high Ca displacement parameters at,low temperature.
C1 Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA.
Michigan State Univ, Ctr Fundamental Mat Res, E Lansing, MI 48824 USA.
Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA.
Ohio State Univ, Dept Chem, Columbus, OH 43210 USA.
Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA.
RI Bozin, Emil/E-4679-2011; Vogt, Thomas /A-1562-2011
OI Vogt, Thomas /0000-0002-4731-2787
NR 34
TC 29
Z9 29
U1 0
U2 7
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 NOV 10
PY 2004
VL 16
IS 44
SI SI
BP S5091
EP S5102
DI 10.1088/0953-8984/16/44/007
PG 12
WC Physics, Condensed Matter
SC Physics
GA 879IE
UT WOS:000225708800008
ER
PT J
AU Serron, SA
Aldridge, WS
Fleming, CN
Danell, RM
Baik, MH
Sykora, M
Dattelbaum, DM
Meyer, TJ
AF Serron, SA
Aldridge, WS
Fleming, CN
Danell, RM
Baik, MH
Sykora, M
Dattelbaum, DM
Meyer, TJ
TI Evidence for through-space electron transfer in the distance dependence
of normal and inverted electron transfer in oligoproline arrays
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID MLCT EXCITED-STATES; POLY-L-PROLINE; AMINO-ACIDS; SOLVENT DEPENDENCE;
CHARGE-TRANSFER; COMPLEXES; ENERGY; OLIGOPEPTIDES; POLYPEPTIDES;
OSMIUM(II)
AB Four new helical oligoproline assemblies containing 16, 17, 18, and 19 proline residues and ordered arrays of a Ru-II-bipyridyl chromophore and a phenothiazine electron-transfer donor have been synthesized in a modular fashion by solid-phase peptide synthesis. These arrays are illustrated and abbreviated as CH3CO-Pro(6)-Pra(PTZ)-Pro(n)-Pra(Ru(II)b(2)M)(2+)-Pro(6)-NH2, where PTZ is 3-(10H-phenothiazine-10)propanoyl and (Ru(II)b'M-2)(2+) is bis(4,4'-diethyl amide-2,2'-bipyridine) (4-methyl, 4'-carboxylate, 2,2'-bipyridine) ruthenium(II) dication with n = 2 (2), 3 (3), 4 (4), and 5 (5). They contain PTZ as an electron-transfer donor and (Ru(II)b'M-2)(2+) as a metal-to-ligand charge transfer (MLCT) light absorber and are separated by proline-to-proline through-space distances ranging from 0 (n = 2) to 12.9 Angstrom (n = 5) relative to the n = 2 case. They exist in the proline-II helix form in water, as shown by circular dichroism measurements. Following laser flash Ru-II --> b'(2)m MLCT excitation at 460 nm in water, excited-state PTZ --> Ru2+* quenching (k(2)) occurs by reductive electron transfer, followed by Ru+ --> PTZ(+) back electron transfer (k(3)), as shown by transient absorption and emission measurements in water at 25degreesC. Quenching with DeltaGdegrees = -0.1 eV is an activated process, while back electron transfer occurs in the inverted region, DeltaGdegrees = -1.8 eV, and is activationless, as shown by temperature dependence measurements. Coincidentally, both reactions have comparable distance dependences, with k(2) varying from = 1.9 x 10(9) (n = 2) to 2.2 x 10(6) s(-1) (n = 4) and k(3) from similar to2.0 x 10(9) (n = 2) to 2.2 x 10(6) s(-1) (n = 4). For both series there is a rate constant enhancement of similar to10 for n = 5 compared to n = 4 and a linear decrease in In k with the through-space separation distance, pointing to a significant and probably dominant through-space component to intrahelical electron transfer.
C1 Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA.
Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Meyer, TJ (reprint author), Univ N Carolina, Dept Chem, CB 3290, Chapel Hill, NC 27599 USA.
EM tjmeyer@lanl.gov
RI Baik, Mu-Hyun/K-7333-2015
NR 52
TC 50
Z9 50
U1 3
U2 27
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD NOV 10
PY 2004
VL 126
IS 44
BP 14506
EP 14514
DI 10.1021/ja030659f
PG 9
WC Chemistry, Multidisciplinary
SC Chemistry
GA 869DV
UT WOS:000224964500052
PM 15521771
ER
PT J
AU Smalley, JF
Sachs, SB
Chidsey, CED
Dudek, SP
Sikes, HD
Creager, SE
Yu, CJ
Feldberg, SW
Newton, MD
AF Smalley, JF
Sachs, SB
Chidsey, CED
Dudek, SP
Sikes, HD
Creager, SE
Yu, CJ
Feldberg, SW
Newton, MD
TI Interfacial electron-transfer kinetics of ferrocene through
oligophenyleneethynylene bridges attached to gold electrodes as
constituents of self-assembled monolayers: Observation of a nonmonotonic
distance dependence
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Review
ID INDUCED TEMPERATURE-JUMP; LIGHT-EMITTING-DIODES; NEGATIVE DIFFERENTIAL
RESISTANCE; PHENYLENE ETHYNYLENE OLIGOMERS;
SCANNING-TUNNELING-MICROSCOPY; REDOX CENTERS; ALKANETHIOL MONOLAYERS;
MOLECULAR ELECTRONICS; CHARGE-TRANSFER; CONJUGATED POLYMERS
AB The standard heterogeneous electron-transfer rate constants (k(n)(0)) between substrate gold electrodes and the ferrocene redox couple attached to the electrode surface by variable lengths of substituted or unsubstituted oligophenyleneethynylene (OPE) bridges as constituents of mixed self-assembled monolayers were measured as a function of temperature. The distance dependences of the unsubstituted OPE standard rate constants and of the preexponential factors (A(n)) obtained from an Arrhenius analysis of the unsubstituted OPE k(n)(0) versus temperature data are not monotonic. This surprising result, together with the distance dependence of the substituted OPE preexponential factors, may be assessed in terms of the likely conformational variability of the OPE bridges (as a result of the low intrinsic barrier to rotation of the phenylene rings in these bridges) and the associated sensitivity of the rate of electron transfer (and, hence, the single-molecule conductance which may be estimated using A(n)) through these bridges to the conformation of the bridge. Additionally, the measured standard rate constants were independent of the identity of the diluent component of the mixed monolayer, and using an unsaturated OPE diluent has no effect on the rate of electron transfer through a long-chain alkanethiol bridge. These observations indicate that the diluent does not participate in the electron-transfer event.
C1 Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA.
Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
Stanford Univ, Dept Chem, Stanford, CA 94305 USA.
Clemson Univ, Dept Chem, Clemson, SC 29634 USA.
Motorola Life Sci, Pasadena, CA 91105 USA.
RP Smalley, JF (reprint author), Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA.
EM smalley@bnl.gov
NR 104
TC 104
Z9 105
U1 7
U2 54
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 NOV 10
PY 2004
VL 126
IS 44
BP 14620
EP 14630
DI 10.1021/ja047458b
PG 11
WC Chemistry, Multidisciplinary
SC Chemistry
GA 869DV
UT WOS:000224964500063
PM 15521782
ER
PT J
AU Plieger, PG
John, KD
Keizer, TS
McCleskey, TM
Burrell, AK
Martint, RL
AF Plieger, PG
John, KD
Keizer, TS
McCleskey, TM
Burrell, AK
Martint, RL
TI Predicting Be-9 nuclear magnetic resonance chemical shielding tensors
utilizing density functional theory
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID AB-INITIO METHODS; CRYSTAL-STRUCTURE; AQUEOUS-SOLUTION;
MOLECULAR-STRUCTURE; BERYLLIUM COMPOUNDS; X-RAY;
STRUCTURAL-CHARACTERIZATION; NMR-SPECTROSCOPY; COMPLEXES; ACID
AB The structures of a series of beryllium containing complexes have been optimized at the B3LYP/6-31G(d) level and their Be-9 magnetic shielding values have been determined using B3LYP/6-311G+g(2d,p) and the gauge-including atomic orbital (GIAO) method. The calculated chemical shifts are in excellent agreement with experimental values. The performance of a variety of NMR methods (SGO, IGAIM, CSGT) were also examined but were found to be inferior to the GIAO method at the chosen level of theory employed. The theoretical method has been utilized to predict the beryllium chemical shifts of structurally characterized complexes for which no measured Be-9 NMR spectrum exists, and to investigate a literature complex with an unusual Be-9 NMR chemical shift. A new standard for beryllium NMR in nonaqueous solvents has been suggested.
C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA.
Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP John, KD (reprint author), Los Alamos Natl Lab, Div Chem, MS J582, Los Alamos, NM 87545 USA.
EM kjohn@lanl.gov
RI McCleskey, Thomas/J-4772-2012;
OI John, Kevin/0000-0002-6181-9330; Mccleskey, Thomas/0000-0003-3750-3245
NR 63
TC 24
Z9 24
U1 0
U2 5
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 NOV 10
PY 2004
VL 126
IS 44
BP 14651
EP 14658
DI 10.1021/ja046712x
PG 8
WC Chemistry, Multidisciplinary
SC Chemistry
GA 869DV
UT WOS:000224964500066
PM 15521785
ER
PT J
AU Park, B
Lorenz, CD
Chandross, M
Stevens, MJ
Grest, GS
Borodin, OA
AF Park, B
Lorenz, CD
Chandross, M
Stevens, MJ
Grest, GS
Borodin, OA
TI Frictional dynamics of fluorine-terminated alkanethiol self-assembled
monolayers
SO LANGMUIR
LA English
DT Article
ID CF3-TERMINATED ALKANETHIOLS; CH3-TERMINATED FILMS; MOLECULAR-DYNAMICS;
SIMULATIONS; CF3; MICROSCOPY; AU(111); CHAINS; GOLD
AB The frictional dynamics of fluorine-terminated alkanethiol (S(CH2)(8)CF3) self-assembled monolayers (SAMs) on gold are studied using molecular dynamics simulations. The simulations treat the interactions between two SAMs on flat surfaces. The structure and frictional behavior are investigated as a function of applied pressure (200 MPa to 1 GPa) for a shear velocity of 2 m/s and compared to methyl-terminated alkanethiol SAMs. The maximum adhesive pressure between the SAMs is 220 MPa for both end groups. In agreement with experiments on the molecular scale, the shear stress and the coefficient of friction for CF3-terminated alkanethiols are larger than for CH3-terminated alkanethiols. The main source for the difference is primarly the tighter packing of the fluorinated terminal group resulting in a higher degree of order. The molecular scale coefficient of friction is correlated with the degree of order among all the systems.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
Univ Utah, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USA.
RP Stevens, MJ (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
OI Borodin, Oleg/0000-0002-9428-5291
NR 29
TC 24
Z9 24
U1 0
U2 8
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD NOV 9
PY 2004
VL 20
IS 23
BP 10007
EP 10014
DI 10.1021/la0491091
PG 8
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA 869KK
UT WOS:000224981600022
PM 15518487
ER
PT J
AU Mao, WL
Shen, GY
Prakapenka, VB
Meng, Y
Campbell, AJ
Heinz, DL
Shu, JF
Hemley, RJ
Mao, HK
AF Mao, WL
Shen, GY
Prakapenka, VB
Meng, Y
Campbell, AJ
Heinz, DL
Shu, JF
Hemley, RJ
Mao, HK
TI Ferromagnesian postperovskite silicates in the D '' layer of the Earth
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
ID CORE-MANTLE BOUNDARY; POST-PEROVSKITE PHASE; SEISMIC EVIDENCE; VELOCITY
ZONES; HIGH-PRESSURE; MGSIO3; TEMPERATURE
AB Natural olivine with 12 mol % Fe2SiO4 and synthetic orthopyroxenes with 20% and 40% FeSiO3 were studied beyond the pressure-temperature conditions of the core-mantle boundary. All samples were found to convert entirely or partially into the CaIrO3 postperovskite structure, which was recently reported for pure MgSiO3. The incorporation of Fe greatly reduces the pressure needed for the transition and establishes the new phase as the major component of the D" layer. With the liquid core as an unlimited reservoir of iron, core-mantle reactions could further enrich the iron content in this phase and explain the intriguing seismic signatures observed in the D" layer.
C1 Univ Chicago, Dept Geophys Sci, Chicago, IL 60637 USA.
Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA.
Univ Chicago, Consortium Adv Radiat Sources, Chicago, IL 60637 USA.
Univ Chicago, James Franck Inst, Chicago, IL 60637 USA.
Argonne Natl Lab, High Pressure Collaborat Access Team, Argonne, IL 60439 USA.
RP Mao, HK (reprint author), Univ Chicago, Dept Geophys Sci, 5734 S Ellis Ave, Chicago, IL 60637 USA.
EM wmao@uchicago.edu
RI Mao, Wendy/D-1885-2009; Shen, Guoyin/D-6527-2011
NR 22
TC 118
Z9 122
U1 0
U2 9
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 NOV 9
PY 2004
VL 101
IS 45
BP 15867
EP 15869
DI 10.1073/pnas.0407135101
PG 3
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 872GX
UT WOS:000225196800010
PM 15520393
ER
PT J
AU Guo, Z
Lee, CS
Morris, JW
AF Guo, Z
Lee, CS
Morris, JW
TI On coherent transformations in steel
SO ACTA MATERIALIA
LA English
DT Article
DE martensitic phase transformation; K-S relationship; N-W relationship;
bain variants; grain refinement
ID ULTRA-FINE FERRITE; VARIANT SELECTION; GRAIN-REFINEMENT; 5.5NI STEEL;
PHASE; STRIP; ALLOY
AB The effective grain size of a martensitic steel is the coherence length of structure domains that share the relevant crystallographic features. These, in turn, depend on the property of interest. The crystallographic feature that governs transgranular fracture is the {100} cleavage plane while that governing dislocation plasticity is normally the {110} slip plane. However, two adjacent sub-volumes that have different orientation relationships do not necessarily mean two effective grains. In this paper, effective grain size is discussed based on 24 Kurdjumov-Sachs and 12 Nishiyama-Wassermann relationships which can be divided into three groups according to their Bain strains. Stereographic projection showed that only those from different Bain groups will have large-angle misorientations between {100} cleavage planes while dislocation glide planes {110} usually do not exhibit large-angle misorientation. Therefore, effective grain sizes for transgranular fracture and plastic deformation are not the same, and do not necessarily respond in the same way to certain grain refinement measures. (C) 2004 Published by Elsevier Ltd on behalf of Acta Materialia, Inc.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Mat Sci & Engn, Ctr Adv Mat, Berkeley, CA 94720 USA.
RP Morris, JW (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Mat Sci & Engn, Ctr Adv Mat, 228 Hearst Mem Mining Bldg, Berkeley, CA 94720 USA.
EM jwmorris@berkeley.edu
NR 24
TC 65
Z9 71
U1 1
U2 28
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
J9 ACTA MATER
JI Acta Mater.
PD NOV 8
PY 2004
VL 52
IS 19
BP 5511
EP 5518
DI 10.1016/j.actamat.2004.08.011
PG 8
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 867KC
UT WOS:000224840500008
ER
PT J
AU Pereloma, EV
Shekhter, A
Miller, MK
Ringer, SP
AF Pereloma, EV
Shekhter, A
Miller, MK
Ringer, SP
TI Ageing behaviour of an Fe-20Ni-1.8Mn-1.6Ti-0.59Al (wt%) maraging alloy:
clustering, precipitation and hardening
SO ACTA MATERIALIA
LA English
DT Article
DE maraging steel; cluster hardening; three-dimensional atom probe;
transmission electron microscopy; precipitation
ID CONTAINING C-300 STEEL; ATOM-PROBE; STRENGTHENING BEHAVIOR;
MECHANICAL-PROPERTIES; MICROSTRUCTURE; TRANSITION
AB Changes in the solute distribution as well as the evolution of precipitation, microstructure and mechanical properties have been studied in an experimental maraging Fe-20Ni-1.8Mn-1.5Ti-0.59Al (wt%) alloy during ageing at 550 degreesC. An initial hardening reaction within 5 s is reported, which is remarkable in terms of extent and rapidity. This strengthening was caused by the formation of complex multi-component atomic co-clusters containing primarily Ni-Ti-Al as well as some Mn. This cluster strengthened condition produced the optimum toughness observed throughout the ageing sequence. After 60 s ageing, the appearance of discrete precipitation of needle-shaped eta-Ni(3)Ti particles was associated with a second rise in hardness towards an eventual peak at 600 s. This precipitation hardening was accompanied by an increase in tensile strength and a decrease in ductility. A reverse transformation of martensite to austenite occurs progressively during ageing and this contributes to the initial and secondary softening. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 Monash Univ, Sch Phys & Mat Engn, Clayton, Vic 3800, Australia.
Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN USA.
Univ Sydney, Australian Key Ctr Microscopy & Microanal, Sydney, NSW 2006, Australia.
RP Pereloma, EV (reprint author), Monash Univ, Sch Phys & Mat Engn, Clayton, Vic 3800, Australia.
EM elena.pereloma@spme.monash.edu.au
RI Ringer, Simon/E-3487-2012
OI Ringer, Simon/0000-0002-1559-330X
NR 42
TC 56
Z9 60
U1 3
U2 20
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
J9 ACTA MATER
JI Acta Mater.
PD NOV 8
PY 2004
VL 52
IS 19
BP 5589
EP 5602
DI 10.1016/j.actamat.2004.08.018
PG 14
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 867KC
UT WOS:000224840500015
ER
PT J
AU Petkovic, LM
Ginosar, DM
AF Petkovic, LM
Ginosar, DM
TI The effect of supercritical isobutane regeneration on the nature of
hydrocarbons deposited on a USY zeolite catalyst utilized for
isobutane/butene alkylation
SO APPLIED CATALYSIS A-GENERAL
LA English
DT Article
DE supercritical fluid regeneration; isobutane/butene alkylation; USY
zeolite; Coke analysis
ID SOLID ACID CATALYSTS; SULFATED ZIRCONIA CATALYSTS; CARBON-DIOXIDE;
ADSORPTION; FTIR; IONS; DEACTIVATION; 1-BUTENE; ETHYLENE; OLEFINS
AB The chemical nature of hydrocarbons remaining on an ultrastable Y-zeolite (USY) utilized for liquid phase isobutane/butene alkylation reaction at 333 K and 1.1 X 10(7) Pa before and after supercritical isobutane regeneration (SFR) at 453 K and 1.1 x 10(7) Pa are presented. Catalyst samples were deactivated to different levels by running the alkylation reaction for different times on stream (TOS) and regenerated under flowing supercritical isobutane for 60 min. Nitrogen physisorption, temperature-programmed oxidation (TPO), diffuse reflectince infrared Fourier transform spectroscopy (DRIFTS), and ultraviolet-visible (UV-vis) spectroscopy measurements suggested that the SFR process was effective in recovering catalyst surface area and micropore volume and that most coke precursors were removed from samples regenerated after short TOS, when the level of activity for trimethylpentanes (TMP) production was high. Samples that were allowed to react for longer TOS contained unsaturated hydrocarbons that, instead of being extracted by the supercritical fluid, dehydrogenated during the SFR process to produce more condensed species. (C) 2004 Elsevier B.V. All rights reserved.
C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA.
RP Petkovic, LM (reprint author), Idaho Natl Engn & Environm Lab, POB 1625, Idaho Falls, ID 83415 USA.
EM petklm@inel.gov
RI Petkovic, Lucia/E-9092-2011; Ginosar, Daniel/C-2357-2017
OI Petkovic, Lucia/0000-0002-0870-3355; Ginosar, Daniel/0000-0002-8522-1659
NR 40
TC 14
Z9 15
U1 5
U2 12
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0926-860X
J9 APPL CATAL A-GEN
JI Appl. Catal. A-Gen.
PD NOV 8
PY 2004
VL 275
IS 1-2
BP 235
EP 245
DI 10.1016/j.apcata.2004.07.037
PG 11
WC Chemistry, Physical; Environmental Sciences
SC Chemistry; Environmental Sciences & Ecology
GA 862SE
UT WOS:000224510400029
ER
PT J
AU Scudino, S
Mickel, C
Schultz, L
Eckert, J
Yang, XY
Sordelet, DJ
AF Scudino, S
Mickel, C
Schultz, L
Eckert, J
Yang, XY
Sordelet, DJ
TI Quasicrystal formation in mechanically alloyed Zr-Ti-Nb-Cu-Ni-Al glassy
powders
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID METALLIC GLASSES; CRYSTALLIZATION; IMPURITIES; ZR70PD30; OXYGEN; PHASE
AB Different from the glassy Zr62Ti7.07Nb2.21Cu12.28Ni9.81Al6.62 melt-spun ribbon that forms a quasicrystalline phase upon devitrification, the corresponding alloy produced by mechanical alloying of elemental powder mixtures does not clearly show quasicrystal formation. However, the addition of an appropriate amount of elemental zirconium to the mechanically alloyed powder changes the crystallization behavior inducing the formation of an icosahedral quasicrystalline phase as the first crystallization product. This indicates that for this multicomponent metallic glass quasicrystal formation in the mechanically alloyed powder is crucially linked to the composition rather than to the question whether there is a special quenched-in short-range order. (C) 2004 American Institute of Physics.
C1 IFW Dresden, Inst Met Werkstoffe, D-01171 Dresden, Germany.
Tech Univ Darmstadt, FG Phys Met, FB Mat & Geowissensch 11, D-64287 Darmstadt, Germany.
Iowa State Univ, Ames Lab, US DOE, Mat & Engn Phys Program, Ames, IA 50011 USA.
RP Scudino, S (reprint author), IFW Dresden, Inst Met Werkstoffe, Postfach 270016, D-01171 Dresden, Germany.
EM s.scudino@ifw-dresden.de
RI Schultz, Ludwig/B-3383-2010; Scudino, Sergio/D-8049-2015
NR 15
TC 10
Z9 10
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD NOV 8
PY 2004
VL 85
IS 19
BP 4349
EP 4351
DI 10.1063/1.1818734
PG 3
WC Physics, Applied
SC Physics
GA 869DE
UT WOS:000224962800028
ER
PT J
AU Lyubinetsky, I
El-Azab, A
Lea, AS
Thevuthasan, S
Baer, DR
AF Lyubinetsky, I
El-Azab, A
Lea, AS
Thevuthasan, S
Baer, DR
TI Initial stages of oxide nanodot heteroepitaxial growth: Cu(2)O on
SrTiO(3)(100)
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID ASSEMBLED QUANTUM DOTS; CRYSTAL-SURFACES; ATOMIC CONTROL; TRANSITION;
SUBSTRATE; ISLANDS
AB The growth mechanism in a heteroepitaxy of oxide nanodots is investigated by a combination of x-ray photoelectron spectroscopy (XPS), atomic force microscopy, and theoretical modeling. In contrast to the majority of semiconductor systems, in the studied metal oxide system of Cu(2)O-SrTiO(3)(100) the growth process starts without wetting layer formation with the appearance of small (similar to10 nm) square-based planar Cu(2)O nanodots. Continued deposition leads mainly to increase of the nanodot density, practically, without change of their size. Only after reaching some critical density (similar to10(13) cm(-2) for 760 K growth temperature), growth of scattered, significantly larger islands starts through the coalescence of small nanodots. XPS analysis suggests that the interface between small nanodots and substrate is abrupt with only weak Cu-O(SrTiO(3)) interaction. (C) 2004 American Institute of Physics.
C1 Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Lyubinetsky, I (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM igor.lyubinetsky@pnl.gov
RI Baer, Donald/J-6191-2013;
OI Baer, Donald/0000-0003-0875-5961; Lea, Alan/0000-0002-4232-1553
NR 22
TC 12
Z9 12
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 NOV 8
PY 2004
VL 85
IS 19
BP 4481
EP 4483
DI 10.1063/1.1819509
PG 3
WC Physics, Applied
SC Physics
GA 869DE
UT WOS:000224962800072
ER
PT J
AU Wesolowski, DJ
AF Wesolowski, DJ
TI Comment on "Solubility of the assemblage albite plus K-feldspar plus
andalusite plus quartz in supercritical aqueous chloride solutions at
650 T and 2 kbar"by T.M. Pak et al., Chemical Geology, Vol. 200,
pp.377-393
SO CHEMICAL GEOLOGY
LA English
DT Editorial Material
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Wesolowski, DJ (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM wesolowskid@ornl.gov
NR 1
TC 0
Z9 0
U1 1
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2541
J9 CHEM GEOL
JI Chem. Geol.
PD NOV 8
PY 2004
VL 211
IS 1-2
BP 177
EP 178
DI 10.1016/j.chemgeo.2004.06.021
PG 2
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 860SS
UT WOS:000224364100009
ER
PT J
AU Dolan, DH
Gupta, YM
AF Dolan, DH
Gupta, YM
TI Nanosecond freezing of water under multiple shock wave compression:
Optical transmission and imaging measurements
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID DYNAMIC COMPRESSION; LIQUID WATER; NUCLEATION; STATE; ICE; SPECTROSCOPY;
TRANSITIONS; INTERFACES; SIMULATION; BUBBLE
AB Water samples were subjected to multiple shock wave compressions, generating peak pressures of 1-5 GPa on nanosecond time scales. This loading process approximates isentropic compression and leads to temperatures where the ice VII phase is more stable than the liquid phase above 2 GPa. Time resolved optical transmission and imaging measurements were performed to determine the solidification rate under such conditions. Freezing occurred faster at higher pressures as water was compressed further into the ice VII phase, in agreement with classical micleation theory. Water consistently froze when in contact with a silica window, whereas no solidification occurred in the presence of sapphire windows. The transition was determined to be a surface initiated process-freezing began via heterogeneous nucleation at the water/window interface and propagated over thicknesses greater than 0.01 mm. The first optical images of freezing on nanosecond time scales were obtained. These images demonstrate heterogeneous nucleation and irregular solid growth over 0.01-0.10 mm lateral length scales and are consistent with latent heat emission during the transformation. The combination of optical transmission and imaging measurements presented here provide the first consistent evidence for freezing on short time scales. (C) 2004 American Institute of Physics.
C1 Washington State Univ, Inst Shock Phys, Pullman, WA 99164 USA.
Washington State Univ, Dept Phys, Pullman, WA 99164 USA.
RP Dolan, DH (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM ymgupta@wsu.edu
NR 46
TC 31
Z9 34
U1 4
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 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD NOV 8
PY 2004
VL 121
IS 18
BP 9050
EP 9057
DI 10.1063/1.1805499
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 866UM
UT WOS:000224798900043
PM 15527371
ER
PT J
AU Harrison, DJ
Tam, NC
Vogels, CM
Langler, RF
Baker, RT
Decken, A
Westcott, SA
AF Harrison, DJ
Tam, NC
Vogels, CM
Langler, RF
Baker, RT
Decken, A
Westcott, SA
TI A gentle and efficient route for the deoxygenation of sulfoxides using
catecholborane (HBcat; cat 1,2-O2C6H4)
SO TETRAHEDRON LETTERS
LA English
DT Article
DE catalysis; catecholborane; deoxygenation; Lewis acid; sulfoxides
ID CHEMOSELECTIVE DEOXYGENATION; REDUCTION; THIOETHERS; CATALYSTS; SULFIDES
AB The addition of catecholborane (HBcat; cat = 1,2-O2C6H4) to a wide range of sulfoxides affords the corresponding sulfides, dihydrogen, and catBOBcat. The diboron compound catBOBcat acts like a Lewis acid and will coordinate one molecule of the starting sulfoxide. Although deoxygenations with bulky or electron withdrawing sulfoxides are slow, these reactions can be greatly accelerated with the use of excess HBcat or by employing a rhodium catalyst. (C) 2004 Elsevier Ltd. All rights reserved.
C1 Mt Allison Univ, Dept Chem, Sackville, NB E4L 1G8, Canada.
Los Alamos Natl Lab, Div Chem, Los Alamos Catalysis Initiat, Los Alamos, NM 87545 USA.
Univ New Brunswick, Dept Chem, Fredericton, NB E3B 5A3, Canada.
RP Baker, RT (reprint author), Mt Allison Univ, Dept Chem, Sackville, NB E4L 1G8, Canada.
EM bakertom@lanl.gov; swestcott@mta.ca
NR 30
TC 41
Z9 41
U1 0
U2 7
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0040-4039
J9 TETRAHEDRON LETT
JI Tetrahedron Lett.
PD NOV 8
PY 2004
VL 45
IS 46
BP 8493
EP 8496
DI 10.1016/j.tetlet.2004.09.068
PG 4
WC Chemistry, Organic
SC Chemistry
GA 866HB
UT WOS:000224763500013
ER
PT J
AU Keranen, SVE
AF Keranen, SVE
TI Simulation study on effects of signaling network structure on the
developmental increase in complexity
SO JOURNAL OF THEORETICAL BIOLOGY
LA English
DT Article
DE signaling network; non-periodic pattern; network structure; development;
complexity
ID PATTERN-FORMATION; REGULATORY NETWORK; GENETIC NETWORKS; DYNAMICAL
TRANSITIONS; LATERAL INHIBITION; REACTION-DIFFUSION; ESCHERICHIA-COLI;
EVOLUTION; MODEL; POLARITY
AB The developmental increase in structural complexity in multicellular lifeforms depends on local, often non-periodic differences in gene expression. These, in turn, depend on a network of gene-gene interactions coded within the organismal genome. To see what architectural features of a network (size, connectivity, etc.) affect the likelihood of patterns with multiple cell types (i.e. patterns where cells express greater than or equal to3 different combinations of genes), developmental pattern formation was simulated in virtual blastoderm embryos with small artificial genomes. Several basic properties of these genomic signaling networks, such as the number of genes, the distributions of positive (inductive) and negative (repressive) interactions, and the strengths of gene-gene interactions were tested. The results show that the frequencies of complex and/or stable patterns depended not only on the existence of negative interactions, but also on the distribution of regulatory interactions: for example, coregulation of signals and their intracellular effectors increased the likelihood of pattern formation compared to differential regulation of signaling pathway components. Interestingly, neither quantitative differences in strengths of signaling interactions nor multiple response thresholds to different levels of signal concentration (as in morphogen gradients) were essential for formation of multiple, spatially unique "cell types". However, those combinations of architectural features that greatly increased the likelihood for pattern complexity tended to decrease the likelihoods for pattern stability and developmental robustness. Nevertheless, elements of complex patterns (e.g. genes, cell type order within the pattern) could differ in their developmental robustness, which may be important for the evolution of complexity. The results show that depending on the network structure, the same set of genes can produce patterns of different complexity, robustness and stability. Because of this, the evolution of metazoan complexity with a combinatorial code of gene regulation may have depended at least as much on selection for favorable distribution of connections between existing developmental regulatory genes as on the simple increase in numbers of regulatory genes. (C) 2004 Elsevier Ltd. All rights reserved.
C1 Ernest Orlando Lawrence Berkeley Natl Lab, Genome Sci Dept, Berkeley, CA 94720 USA.
RP Ernest Orlando Lawrence Berkeley Natl Lab, Genome Sci Dept, MS 171-84,1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM svekeranen@lbl.gov
FU NIGMS NIH HHS [R01 GM70444, R01 GM42387]
NR 56
TC 6
Z9 7
U1 0
U2 2
PU ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
PI LONDON
PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
SN 0022-5193
EI 1095-8541
J9 J THEOR BIOL
JI J. Theor. Biol.
PD NOV 7
PY 2004
VL 231
IS 1
BP 3
EP 21
DI 10.1016/j.jtbi.2004.03.021
PG 19
WC Biology; Mathematical & Computational Biology
SC Life Sciences & Biomedicine - Other Topics; Mathematical & Computational
Biology
GA 860OH
UT WOS:000224352400002
PM 15363926
ER
PT J
AU Park, JS
Chu, JSF
Cheng, C
Chen, FQ
Chen, D
Li, S
AF Park, JS
Chu, JSF
Cheng, C
Chen, FQ
Chen, D
Li, S
TI Differential effects of equiaxial and uniaxial strain on mesenchymal
stem cells
SO BIOTECHNOLOGY AND BIOENGINEERING
LA English
DT Article
DE bone marrow mesenchymal stem cells; smooth muscle cells; mechanical
stretch; equiaxial strain; uniaxial strain; DNA microarray
ID VASCULAR SMOOTH-MUSCLE; MECHANICAL STRAIN; IN-VITRO; ELASTIN-RECEPTOR;
STROMAL CELLS; MARROW; PROLIFERATION; ARTERIES; STRETCH; ORIENTATION
AB Bone marrow mesenchymal stem cells (MSCs) can differentiate into a variety of cell types, including vascular smooth muscle cells (SMCs), and have tremendous potential as a cell source for cardiovascular regeneration. We postulate that specific vascular environmental factors will promote MSC differentiation into SMCs. However, the effects of the vascular mechanical environment on MSCs have not been characterized. Here we show that mechanical strain regulated the expression of SMC markers in MSCs. Cyclic equiaxial strain downregulated SM alpha-actin and SM-22alpha in MSCs on collagen- or elastin-coated membranes after 1 day, and decreased alpha-actin in stress fibers. In contrast, cyclic uniaxial strain transiently increased the expression of SM alpha-actin and SM-22alpha after 1 day, which subsequently returned to basal levels after the cells aligned in the direction perpendicular to the strain direction. In addition, uniaxial but not equiaxial strain induced a transient increase of collagen I expression. DNA microarray experiments showed that uniaxial strain increased SMC markers and regulated the expression of matrix molecules without significantly changing the expression of the differentiation markers (e.g., alkaline phosphatase and collagen II) of other cell types. Our results suggest that uniaxial strain, which better mimics the type of mechanical strain experienced by SMCs, may promote MSC differentiation into SMCs if cell orientation can be controlled. This Study demonstrates the differential effects of equiaxial and uniaxial strain, advances our understanding of the mechanical regulation of stem cells, and provides a rational basis for engineering MSCs for vascular tissue engineering and regeneration. (C) 2004 Wiley Periodicals, Inc. Keywords: bone marrow mesenchymal stem cells; smooth muscle cells; mechanical stretch; equiaxial strain; uniaxial strain; DNA microarray
C1 Univ Calif Berkeley, Dept Bioengn, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Ctr Tissue Bioengn, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
RP Li, S (reprint author), Univ Calif Berkeley, Dept Bioengn, 471 Evans Hall 1762, Berkeley, CA 94720 USA.
EM songli@socrates.berkeley.edu
FU NCI NIH HHS [R21CA95393-01]
NR 38
TC 188
Z9 205
U1 6
U2 37
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 NOV 5
PY 2004
VL 88
IS 3
BP 359
EP 368
DI 10.1002/bit.20250
PG 10
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA 866SX
UT WOS:000224794600010
PM 15486942
ER
PT J
AU Li, LX
Dong, JH
Nenoff, TM
Lee, R
AF Li, LX
Dong, JH
Nenoff, TM
Lee, R
TI Reverse osmosis of ionic aqueous solutions on a MFI zeolite membrane
SO DESALINATION
LA English
DT Article
DE MFI; zeolite membrane; reverse osmosis; ion separation
ID DIELECTRIC FRICTION; SEPARATION; HYDRATION; REMOVAL; WATER;
PERVAPORATION; SIMULATIONS; DYNAMICS; SUPPORTS; MOBILITY
AB Separation of ions from aqueous solutions was performed by reverse osmosis (RO) on an a-alumina-supported MFI-type zeolite membrane synthesized by in-situ crystallization. For the 0.1 M chloride single-salt solutions, the separation efficiency in terms of ion rejection was found to increase with the ion valence in the order r(Al)(3+) > r(Mg)(2+) > r(Na)(+), while the ion and water fluxes changed in the reverse order. The charge density, size, and apparent dynamic hydration number of the ion as well as the mobility of the hydrated ion were found to have critical influences on ion diffusion and water permeation through the polycrystalline zeolite membrane.
C1 New Mexico Inst Min & Technol, Dept Petr & Chem Engn, Socorro, NM 87801 USA.
New Mexico Inst Min & Technol, Petr Recovery Res Ctr, Socorro, NM 87801 USA.
Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Dong, JH (reprint author), New Mexico Inst Min & Technol, Dept Petr & Chem Engn, Socorro, NM 87801 USA.
EM jhdong@nmt.edu
NR 33
TC 44
Z9 47
U1 2
U2 21
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0011-9164
J9 DESALINATION
JI Desalination
PD NOV 5
PY 2004
VL 170
IS 3
BP 309
EP 316
DI 10.1016/j.desal.2004.02.102
PG 8
WC Engineering, Chemical; Water Resources
SC Engineering; Water Resources
GA 876KT
UT WOS:000225496400008
ER
PT J
AU Apra, E
Carter, EA
Fortunelli, A
AF Apra, E
Carter, EA
Fortunelli, A
TI Separability between valence and conduction bands in transition metal
clusters
SO INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
LA English
DT Article
DE structural energy differences; d-s hybridization; electronic structure;
transition and noble metals; inter-band mixing
ID DENSITY-FUNCTIONAL CALCULATIONS; RENORMALIZED ATOMS; INTERPOLATION
SCHEME; ELECTRONIC-STRUCTURE; SURFACES; NOBLE; QUADRATURE; MOLECULES;
APPROXIMATION; ELEMENTS
AB Simplified theories of transition metal electronic structure have been postulated for many decades. We test one such approximation, namely separate treatments of d (valence) and s/p (conduction) electrons in transition metal clusters, within a density functional theory (DFT) formalism. Two different basic approaches are considered: (a) an independent-band approximation, in which the d- and s/p-bands interact only via the p-dependent components of the Kohn-Sham operator; and (b) a more realistic approximation, in which the lowest-energy d- and s/p-orbitals (separately derived) are allowed to interact through explicit off-diagonal coupling matrix elements. The results are presented for the energy differences among three structural forms (icosahedral, cuboctahedral, and truncated decahedral) of 13-atom Ni and Pt clusters. We demonstrate that an explicit decoupling of the d- and s/p-bands does not produce accurate results for the clusters considered, not even for nickel, i.e., the transition metal for which d-s/p mixing should be at its minimum. By contrast, allowing the lowest-energy orbitals of the two separate bands to interact improves the results considerably, and ensures a fair description of metal-metal bonding. This finding suggests that simplified models that exclude explicit d-s/p coupling should be employed with caution. (C) 2004 Wiley Periodicals, Inc.
C1 CNR, IPCF, Mol Modeling Lab, I-56010 Ghezzano, PI, Italy.
Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA.
Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA.
RP Fortunelli, A (reprint author), CNR, IPCF, Mol Modeling Lab, Via V Alfieri 1, I-56010 Ghezzano, PI, Italy.
EM fortunelli@ipcf.cnr.it
RI Apra, Edoardo/F-2135-2010; Carter, Emily/P-4075-2014
OI Apra, Edoardo/0000-0001-5955-0734;
NR 43
TC 5
Z9 5
U1 1
U2 1
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0020-7608
J9 INT J QUANTUM CHEM
JI Int. J. Quantum Chem.
PD NOV 5
PY 2004
VL 100
IS 3
BP 277
EP 287
DI 10.1002/qua.20192
PG 11
WC Chemistry, Physical; Mathematics, Interdisciplinary Applications;
Physics, Atomic, Molecular & Chemical
SC Chemistry; Mathematics; Physics
GA 860CX
UT WOS:000224317600003
ER
PT J
AU Lou, ZK
Chen, BPC
Asaithamby, A
Minter-Dykhouse, K
Chen, DJ
Chen, JJ
AF Lou, ZK
Chen, BPC
Asaithamby, A
Minter-Dykhouse, K
Chen, DJ
Chen, JJ
TI MDC1 regulates DNA-PK autophosphorylation in response to DNA damage
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID DEPENDENT PROTEIN-KINASE; STRAND BREAK REPAIR; CATALYTIC SUBUNIT; ATM
ACTIVATION; CHECKPOINT; PHOSPHORYLATION; REQUIREMENT; PATHWAYS;
MEDIATOR; COMPLEX
AB DNA damage initiates signaling events through kinase cascades that result in cell cycle checkpoint control and DNA repair. However, it is not yet clear how the signaling pathways relay to DNA damage repair. Using the repeat region of checkpoint protein MDC1 (mediator of DNA damage checkpoint protein 1), we identified DNA-PKcs/Ku as MDC1-associated proteins. Here, we show that MDC1 directly interacts with the Ku/DNA-PKcs complex. Down-regulation of MDC1 resulted in defective phospho-DNA-PKcs foci formation and DNA-PKcs autophosphorylation, suggesting that MDC1 regulates autophosphorylation of DNA-PKcs following DNA damage. Furthermore, DNA-PK-dependent DNA damage repair is defective in cells depleted of MDC1. Taken together, these results suggest that the MDC1 repeat region is involved in protein-protein interaction with DNA-PKcs/Ku, and MDC1 regulates DNA damage repair by influencing DNA-PK autophosphorylation. Therefore, MDC1 acts not only as a mediator of DNA damage checkpoint but also as a mediator of DNA damage repair.
C1 Mayo Clin & Mayo Fdn, Dept Oncol, Rochester, MN 55905 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
RP Chen, JJ (reprint author), Mayo Clin & Mayo Fdn, Dept Oncol, 200 1st St SW, Rochester, MN 55905 USA.
EM Chen.Junjie@mayo.edu
RI Minter Dykhouse, Katherine/L-4573-2013
OI Minter Dykhouse, Katherine/0000-0003-4363-5826
FU NCI NIH HHS [CA50519, R01 CA89239, CA92312]; NIA NIH HHS [AG18949]
NR 22
TC 58
Z9 61
U1 0
U2 0
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 NOV 5
PY 2004
VL 279
IS 45
BP 46359
EP 46362
DI 10.1074/jbc.C400375200
PG 4
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 867HE
UT WOS:000224832400003
PM 15377652
ER
PT J
AU Manuel, RC
Hitomi, K
Arvai, AS
House, PG
Kurtz, AJ
Dodson, ML
McCullough, AK
Tainer, JA
Lloyd, RS
AF Manuel, RC
Hitomi, K
Arvai, AS
House, PG
Kurtz, AJ
Dodson, ML
McCullough, AK
Tainer, JA
Lloyd, RS
TI Reaction intermediates in the catalytic mechanism of Escherichia coli
MutY DNA glycosylase
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID BASE EXCISION-REPAIR; MEDIATED CHARGE-TRANSPORT; T4 ENDONUCLEASE-V;
C-TERMINAL DOMAIN; ADENINE GLYCOSYLASE; STRUCTURAL BASIS; SUBSTRATE
RECOGNITION; FLIPPING MECHANISM; PYRIMIDINE DIMER; DAMAGED DNA
AB The Escherichia coli adenine DNA glycosylase, MutY, plays an important role in the maintenance of genomic stability by catalyzing the removal of adenine opposite 8-oxo-7,8-dihydroguanine or guanine in duplex DNA. Although the x-ray crystal structure of the catalytic domain of MutY revealed a mechanism for catalysis of the glycosyl bond, it appeared that several opportunistically positioned lysine side chains could participate in a secondary beta-elimination reaction. In this investigation, it is established via site-directed mutagenesis and the determination of a 1.35-Angstrom structure of MutY in complex with adenine that the abasic site (apurinic/apyrimidinic) lyase activity is alternatively regulated by two lysines, Lys(142) and Lys(20). Analyses of the crystallographic structure also suggest a role for Glu(161) in the apurinic/apyrimidinic lyase chemistry. The beta-elimination reaction is structurally and chemically uncoupled from the initial glycosyl bond scission, indicating that this reaction occurs as a consequence of active site plasticity and slow dissociation of the product complex. MutY with either the K142A or K20A mutation still catalyzes beta and beta-delta elimination reactions, and both mutants can be trapped as covalent enzyme-DNA intermediates by chemical reduction. The trapping was observed to occur both pre- and post-phosphodiester bond scission, establishing that both of these intermediates have significant half-lives. Thus, the final spectrum of DNA products generated reflects the outcome of a delicate balance of closely related equilibrium constants.
C1 Oregon Hlth Sci Univ, Ctr Res Occupat & Environm Toxicol, Portland, OR 97239 USA.
Univ Texas, Med Branch, Sealy Ctr Mol Sci, Galveston, TX 77555 USA.
Univ Texas, Med Branch, Dept Human Biol Chem & Genet, Galveston, TX 77555 USA.
Scripps Res Inst, Dept Mol Biol, Skaggs Inst Chem Biol, La Jolla, CA 92037 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA.
RP Lloyd, RS (reprint author), Oregon Hlth Sci Univ, Ctr Res Occupat & Environm Toxicol, 3181 SW Sam Jackson Pk Rd, Portland, OR 97239 USA.
EM lloydst@ohsu.edu
FU NIEHS NIH HHS [P30 ES 06766]; NIGMS NIH HHS [GM46312, GM59237]
NR 42
TC 38
Z9 39
U1 0
U2 2
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 NOV 5
PY 2004
VL 279
IS 45
BP 46930
EP 46939
DI 10.1074/jbc.M403944200
PG 10
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 867HE
UT WOS:000224832400076
PM 15326180
ER
PT J
AU Tanaka, Y
Baron, AQR
Kim, YJ
Thomas, KJ
Hill, JP
Honda, Z
Iga, F
Tsutsui, S
Ishikawa, D
Nelson, CS
AF Tanaka, Y
Baron, AQR
Kim, YJ
Thomas, KJ
Hill, JP
Honda, Z
Iga, F
Tsutsui, S
Ishikawa, D
Nelson, CS
TI Search for orbitons in LaMnO3, YTiO3 and KCuF3 using high-resolution
inelastic x-ray scattering
SO NEW JOURNAL OF PHYSICS
LA English
DT Article
ID NEUTRON-DIFFRACTION; ELEMENTARY EXCITATIONS; MAGNETIC-PROPERTIES;
MANGANITES; ORBITALS; WAVES
AB Orbital excitations have been sought in three systems, LaMnO3, KCuF3 andYTiO(3), using high-resolution inelastic x-ray scattering, with an energy resolution of 6 meV. Motivated by the recent Raman scattering result of Saitoh et al (2001 Nature 410 180), we measured the energy transfer spectra of LaMnO3 in the energy range up to 200 meV. We did not find any signal above background that could be associated with orbiton excitations. Since significant interaction between the spin and orbital degrees of freedom is expected in KCuF3 andYTiO(3), energy spectra were measured above and below the respective magnetic ordering temperature. We were not able to detect any change in the excitation spectra due to the magnetic ordering temperature of these materials. We discuss the implications of the experimental findings and estimate an upper bound on the orbiton x-ray cross-section.
C1 RIKEN, SPring 8, Sayo, Hyogo 6795148, Japan.
JASRI, SPring 8, Sayo, Hyogo 6795198, Japan.
Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
Saitama Univ, Saitama 3388570, Japan.
Hiroshima Univ, Grad Sch Adv Sci Matter, Higashihiroshima 7398530, Japan.
RP RIKEN, SPring 8, Sayo, Hyogo 6795148, Japan.
EM ytanaka@riken.jp
RI Kim, Young-June /G-7196-2011
OI Kim, Young-June /0000-0002-1172-8895
NR 46
TC 7
Z9 7
U1 0
U2 7
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 NOV 5
PY 2004
VL 6
AR 161
DI 10.1088/1367-2630/6/1/161
PG 13
WC Physics, Multidisciplinary
SC Physics
GA 869DQ
UT WOS:000224964000010
ER
PT J
AU Andersson, K
Nikitin, A
Pettersson, LGM
Nilsson, A
Ogasawara, H
AF Andersson, K
Nikitin, A
Pettersson, LGM
Nilsson, A
Ogasawara, H
TI Water dissociation on Ru(001): An activated process
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ADSORPTION; SURFACE; PT(111); BILAYER; H2O
AB It is shown using x-ray photoelectron spectroscopy that water is adsorbed either nondissociatively or partially dissociatively on Ru(001) under ultrahigh vacuum conditions. We found an activated dissociation process with a barrier slightly larger than that of desorption. A difference in dissociation barriers is found between H2O and D2O that explains the anomalous isotope effects in the thermal desorption. Previous theoretical and experimental disagreements can be rationalized based on electron or x-ray beam-induced dissociation of the water overlayer and an earlier underestimation of the dissociation barrier.
C1 Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
Stockholm Univ, FYSIKUM, Albanova Univ Ctr, S-10691 Stockholm, Sweden.
RP Andersson, K (reprint author), Stanford Synchrotron Radiat Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
RI Nilsson, Anders/E-1943-2011; Pettersson, Lars/F-8428-2011; Pettersson,
Lars/J-4925-2013; Ogasawara, Hirohito/D-2105-2009;
OI 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
NR 17
TC 147
Z9 147
U1 1
U2 23
PU AMERICAN 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 NOV 5
PY 2004
VL 93
IS 19
AR 196101
DI 10.1103/PhysRevLett.93.196101
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 868PG
UT WOS:000224924900042
PM 15600853
ER
PT J
AU Aubert, B
Barate, R
Boutigny, D
Couderc, F
Gaillard, JM
Hicheur, A
Karyotakis, Y
Lees, JP
Tisserand, V
Zghiche, A
Palano, A
Pompili, A
Chen, JC
Qi, ND
Rong, G
Wang, P
Zhu, YS
Eigen, G
Ofte, I
Stugu, B
Abrams, GS
Borgland, AW
Breon, AB
Brown, DN
Button-Shafer, J
Cahn, RN
Charles, E
Day, CT
Gill, MS
Gritsan, AV
Groysman, Y
Jacobsen, RG
Kadel, RW
Kadyk, J
Kerth, LT
Kolomensky, YG
Kukartsev, G
Lynch, G
Mir, LM
Oddone, PJ
Orimoto, TJ
Pripstein, M
Roe, NA
Ronan, MT
Shelkov, VG
Wenzel, WA
Barrett, M
Ford, KE
Harrison, TJ
Hart, AJ
Hawkes, CM
Morgan, SE
Watson, AT
Fritsch, M
Goetzen, K
Held, T
Koch, H
Lewandowski, B
Pelizaeus, M
Steinke, M
Boyd, JT
Chevalier, N
Cottingham, WN
Kelly, MP
Latham, TE
Wilson, FF
Cuhadar-Donszelmann, T
Hearty, C
Knecht, NS
Mattison, TS
McKenna, JA
Thiessen, D
Khan, A
Kyberd, P
Teodorescu, L
Blinov, AE
Blinov, VE
Druzhinin, VP
Golubev, VB
Ivanchenko, VN
Kravchenko, EA
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Yushkov, AN
Best, D
Bruinsma, M
Chao, M
Eschrich, I
Kirkby, D
Lankford, AJ
Mandelkern, M
Mommsen, RK
Roethel, W
Stoker, DP
Buchanan, C
Hartfiel, BL
Foulkes, SD
Gary, JW
Shen, BC
Wang, K
del Re, D
Hadavand, HK
Hill, EJ
MacFarlane, DB
Paar, HP
Rahatlou, S
Sharma, V
Berryhill, JW
Campagnari, C
Dahmes, B
Long, O
Lu, A
Mazur, MA
Richman, JD
Verkerke, W
Beck, TW
Eisner, AM
Heusch, CA
Kroseberg, J
Lockman, WS
Nesom, G
Schalk, T
Schumm, BA
Seiden, A
Spradlin, P
Williams, DC
Wilson, MG
Albert, J
Chen, E
Dubois-Felsmann, GP
Dvoretskii, A
Hitlin, DG
Narsky, I
Piatenko, T
Porter, FC
Ryd, A
Samuel, A
Yang, S
Jayatilleke, S
Mancinelli, G
Meadows, BT
Sokoloff, MD
Abe, T
Blanc, F
Bloom, P
Chen, S
Ford, WT
Nauenberg, U
Olivas, A
Rankin, P
Smith, JG
Zhang, J
Zhang, L
Chen, A
Harton, JL
Soffer, A
Toki, WH
Wilson, RJ
Zeng, Q
Altenburg, D
Brandt, T
Brose, J
Dickopp, M
Feltresi, E
Hauke, A
Lacker, HM
Muller-Pfefferkorn, R
Nogowski, R
Otto, S
Petzold, A
Schubert, J
Schubert, KR
Schwierz, R
Spaan, B
Sundermann, JE
Bernard, D
Bonneaud, GR
Brochard, F
Grenier, P
Schrenk, S
Thiebaux, C
Vasileiadis, G
Verderi, M
Bard, DJ
Clark, PJ
Lavin, D
Muheim, F
Playfer, S
Xie, Y
Andreotti, M
Azzolini, V
Bettoni, D
Bozzi, C
Calabrese, R
Cibinetto, G
Luppi, E
Negrini, M
Piemontese, L
Sarti, A
Treadwell, E
Anulli, F
Baldini-Ferroli, R
Calcaterra, A
de Sangro, R
Finocchiaro, G
Patteri, P
Peruzzi, IM
Piccolo, M
Zallo, A
Buzzo, A
Capra, R
Contri, R
Crosetti, G
Lo Vetere, M
Macri, M
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Santroni, A
Tosi, S
Bailey, S
Brandenburg, G
Chaisanguanthum, KS
Morii, M
Won, E
Dubitzky, RS
Langenegger, U
Bhimji, W
Bowerman, DA
Dauncey, PD
Egede, U
Gaillard, JR
Morton, GW
Nash, JA
Nikolich, MB
Taylor, GP
Charles, MJ
Grenier, GJ
Mallik, U
Cochran, J
Crawley, HB
Lamsa, J
Meyer, WT
Prell, S
Rosenberg, EI
Rubin, AE
Yi, J
Biasini, M
Covarelli, R
Pioppi, M
Davier, M
Giroux, X
Grosdidier, G
Hocker, A
Laplace, S
Le Diberder, F
Lepeltier, V
Lutz, AM
Petersen, TC
Plaszczynski, S
Schune, MH
Tantot, L
Wormser, G
Cheng, CH
Lange, DJ
Simani, MC
Wright, DM
Bevan, AJ
Chavez, CA
Coleman, JP
Forster, IJ
Fry, JR
Gabathuler, E
Gamet, R
Hutchcroft, DE
Parry, RJ
Payne, DJ
Sloane, RJ
Touramanis, C
Back, JJ
Cormack, CM
Harrison, PF
Di Lodovico, F
Mohanty, GB
Brown, CL
Cowan, G
Flack, RL
Flaecher, HU
Green, MG
Jackson, PS
McMahon, TR
Ricciardi, S
Salvatore, F
Winter, MA
Brown, D
Davis, CL
Allison, J
Barlow, NR
Barlow, RJ
Hart, PA
Hodgkinson, MC
Lafferty, GD
Lyon, AJ
Williams, JC
Chen, C
Farbin, A
Hulsbergen, WD
Jawahery, A
Kovalskyi, D
Lae, CK
Lillard, V
Roberts, DA
Blaylock, G
Dallapiccola, C
Flood, KT
Hertzbach, SS
Kofler, R
Koptchev, VB
Moore, TB
Saremi, S
Staengle, H
Willocq, S
Cowan, R
Sciolla, G
Sekula, SJ
Taylor, F
Yamamoto, RK
Mangeol, DJJ
Patel, PM
Robertson, SH
Lazzaro, A
Lombardo, V
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
Godang, R
Kroeger, R
Reidy, J
Sanders, DA
Summers, DJ
Zhao, HW
Brunet, S
Cote, D
Taras, P
Nicholson, H
Cavallo, N
Fabozzi, F
Gatto, C
Lista, L
Monorchio, D
Paolucci, P
Piccolo, D
Sciacca, C
Baak, M
Bulten, H
Raven, G
Snoek, HL
Wilden, L
Jessop, CP
LoSecco, JM
Allmendinger, T
Gan, KK
Honscheid, K
Hufnagel, D
Kagan, H
Kass, R
Pulliam, T
Rahimi, AM
Ter-Antonyan, R
Wong, QK
Brau, J
Frey, R
Igonkina, O
Potter, CT
Sinev, NB
Strom, D
Torrence, E
Colecchia, F
Dorigo, A
Galeazzi, F
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Tiozzo, G
Voci, C
Benayoun, M
Briand, H
Chauveau, J
David, P
de la Vaissiere, C
Del Buono, L
Hamon, O
John, MJJ
Leruste, P
Malcles, J
Ocariz, J
Pivk, M
Roos, L
T'Jampens, S
Therin, G
Manfredi, PF
Re, V
Behera, PK
Gladney, L
Guo, QH
Panetta, J
Angelini, C
Batignani, G
Bettarini, S
Bondioli, M
Bucci, F
Calderini, G
Carpinelli, M
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Martinez-Vidal, F
Morganti, M
Neri, N
Paoloni, E
Rama, M
Rizzo, G
Sandrelli, F
Walsh, J
Haire, M
Judd, D
Paick, K
Wagoner, DE
Danielson, N
Elmer, P
Lau, YP
Lu, C
Miftakov, V
Olsen, J
Smith, AJS
Telnov, AV
Bellini, F
Cavoto, G
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Li Gioi, L
Mazzoni, MA
Morganti, S
Pierini, M
Piredda, G
Tehrani, FS
Voena, C
Christ, S
Wagner, G
Waldi, R
Adye, T
De Groot, N
Franek, B
Geddes, NI
Gopal, GP
Olaiya, EO
Aleksan, R
Emery, S
Gaidot, A
Ganzhur, SF
Giraud, PF
de Monchenault, GH
Kozanecki, W
Legendre, M
London, GW
Mayer, B
Schott, G
Vasseur, G
Yeche, C
Zito, M
Purohit, MV
Weidemann, AW
Wilson, JR
Yumiceva, FX
Aston, D
Bartoldus, R
Berger, N
Boyarski, AM
Buchmueller, OL
Claus, R
Convery, MR
Cristinziani, M
De Nardo, G
Dong, D
Dorfan, J
Dujmic, D
Dunwoodie, W
Elsen, EE
Fan, S
Field, RC
Glanzman, T
Gowdy, SJ
Hadig, T
Halyo, V
Hast, C
Hryn'ova, T
Innes, WR
Kelsey, MH
Kim, P
Kocian, ML
Leith, DWGS
Libby, J
Luitz, S
Luth, V
Lynch, HL
Marsiske, H
Messner, R
Muller, DR
O'Grady, CP
Ozcan, VE
Perazzo, A
Perl, M
Petrak, S
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Simi, G
Snyder, A
Soha, A
Stelzer, J
Su, D
Sullivan, MK
Va'vra, J
Wagner, SR
Weaver, M
Weinstein, AJR
Wisniewski, WJ
Wittgen, M
Wright, DH
Yarritu, AK
Young, CC
Burchat, PR
Edwards, AJ
Meyer, TI
Petersen, BA
Roat, C
Ahmed, S
Alam, MS
Ernst, JA
Saeed, MA
Saleem, M
Wappler, FR
Bugg, W
Krishnamurthy, M
Spanier, SM
Eckmann, R
Kim, H
Ritchie, JL
Satpathy, A
Schwitters, RF
Izen, JM
Kitayama, I
Lou, XC
Ye, S
Bianchi, F
Bona, M
Gallo, F
Gamba, D
Bosisio, L
Cartaro, C
Cossutti, F
Della Ricca, G
Dittongo, S
Grancagnolo, S
Lanceri, L
Poropat, P
Vitale, L
Vuagnin, G
Panvini, RS
Banerjee, S
Brown, CM
Fortin, D
Jackson, PD
Kowalewski, R
Roney, JM
Sobie, RJ
Band, HR
Cheng, B
Dasu, S
Datta, M
Eichenbaum, AM
Graham, M
Hollar, JJ
Johnson, JR
Kutter, PE
Li, H
Liu, R
Mihalyi, A
Mohapatra, AK
Pan, Y
Prepost, R
Tan, P
von Wimmersperg-Toeller, JH
Wu, J
Wu, SL
Yu, Z
Greene, MG
Neal, H
AF Aubert, B
Barate, R
Boutigny, D
Couderc, F
Gaillard, JM
Hicheur, A
Karyotakis, Y
Lees, JP
Tisserand, V
Zghiche, A
Palano, A
Pompili, A
Chen, JC
Qi, ND
Rong, G
Wang, P
Zhu, YS
Eigen, G
Ofte, I
Stugu, B
Abrams, GS
Borgland, AW
Breon, AB
Brown, DN
Button-Shafer, J
Cahn, RN
Charles, E
Day, CT
Gill, MS
Gritsan, AV
Groysman, Y
Jacobsen, RG
Kadel, RW
Kadyk, J
Kerth, LT
Kolomensky, YG
Kukartsev, G
Lynch, G
Mir, LM
Oddone, PJ
Orimoto, TJ
Pripstein, M
Roe, NA
Ronan, MT
Shelkov, VG
Wenzel, WA
Barrett, M
Ford, KE
Harrison, TJ
Hart, AJ
Hawkes, CM
Morgan, SE
Watson, AT
Fritsch, M
Goetzen, K
Held, T
Koch, H
Lewandowski, B
Pelizaeus, M
Steinke, M
Boyd, JT
Chevalier, N
Cottingham, WN
Kelly, MP
Latham, TE
Wilson, FF
Cuhadar-Donszelmann, T
Hearty, C
Knecht, NS
Mattison, TS
McKenna, JA
Thiessen, D
Khan, A
Kyberd, P
Teodorescu, L
Blinov, AE
Blinov, VE
Druzhinin, VP
Golubev, VB
Ivanchenko, VN
Kravchenko, EA
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Serednyakov, SI
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Solodov, EP
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Bruinsma, M
Chao, M
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Kirkby, D
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Mandelkern, M
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Shen, BC
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de Sangro, R
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Le Diberder, F
Lepeltier, V
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Tantot, L
Wormser, G
Cheng, CH
Lange, DJ
Simani, MC
Wright, DM
Bevan, AJ
Chavez, CA
Coleman, JP
Forster, IJ
Fry, JR
Gabathuler, E
Gamet, R
Hutchcroft, DE
Parry, RJ
Payne, DJ
Sloane, RJ
Touramanis, C
Back, JJ
Cormack, CM
Harrison, PF
Di Lodovico, F
Mohanty, GB
Brown, CL
Cowan, G
Flack, RL
Flaecher, HU
Green, MG
Jackson, PS
McMahon, TR
Ricciardi, S
Salvatore, F
Winter, MA
Brown, D
Davis, CL
Allison, J
Barlow, NR
Barlow, RJ
Hart, PA
Hodgkinson, MC
Lafferty, GD
Lyon, AJ
Williams, JC
Chen, C
Farbin, A
Hulsbergen, WD
Jawahery, A
Kovalskyi, D
Lae, CK
Lillard, V
Roberts, DA
Blaylock, G
Dallapiccola, C
Flood, KT
Hertzbach, SS
Kofler, R
Koptchev, VB
Moore, TB
Saremi, S
Staengle, H
Willocq, S
Cowan, R
Sciolla, G
Sekula, SJ
Taylor, F
Yamamoto, RK
Mangeol, DJJ
Patel, PM
Robertson, SH
Lazzaro, A
Lombardo, V
Palombo, F
Bauer, JM
Cremaldi, L
Eschenburg, V
Godang, R
Kroeger, R
Reidy, J
Sanders, DA
Summers, DJ
Zhao, HW
Brunet, S
Cote, D
Taras, P
Nicholson, H
Cavallo, N
Fabozzi, F
Gatto, C
Lista, L
Monorchio, D
Paolucci, P
Piccolo, D
Sciacca, C
Baak, M
Bulten, H
Raven, G
Snoek, HL
Wilden, L
Jessop, CP
LoSecco, JM
Allmendinger, T
Gan, KK
Honscheid, K
Hufnagel, D
Kagan, H
Kass, R
Pulliam, T
Rahimi, AM
Ter-Antonyan, R
Wong, QK
Brau, J
Frey, R
Igonkina, O
Potter, CT
Sinev, NB
Strom, D
Torrence, E
Colecchia, F
Dorigo, A
Galeazzi, F
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simonetto, F
Stroili, R
Tiozzo, G
Voci, C
Benayoun, M
Briand, H
Chauveau, J
David, P
de la Vaissiere, C
Del Buono, L
Hamon, O
John, MJJ
Leruste, P
Malcles, J
Ocariz, J
Pivk, M
Roos, L
T'Jampens, S
Therin, G
Manfredi, PF
Re, V
Behera, PK
Gladney, L
Guo, QH
Panetta, J
Angelini, C
Batignani, G
Bettarini, S
Bondioli, M
Bucci, F
Calderini, G
Carpinelli, M
Forti, F
Giorgi, MA
Lusiani, A
Marchiori, G
Martinez-Vidal, F
Morganti, M
Neri, N
Paoloni, E
Rama, M
Rizzo, G
Sandrelli, F
Walsh, J
Haire, M
Judd, D
Paick, K
Wagoner, DE
Danielson, N
Elmer, P
Lau, YP
Lu, C
Miftakov, V
Olsen, J
Smith, AJS
Telnov, AV
Bellini, F
Cavoto, G
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Li Gioi, L
Mazzoni, MA
Morganti, S
Pierini, M
Piredda, G
Tehrani, FS
Voena, C
Christ, S
Wagner, G
Waldi, R
Adye, T
De Groot, N
Franek, B
Geddes, NI
Gopal, GP
Olaiya, EO
Aleksan, R
Emery, S
Gaidot, A
Ganzhur, SF
Giraud, PF
de Monchenault, GH
Kozanecki, W
Legendre, M
London, GW
Mayer, B
Schott, G
Vasseur, G
Yeche, C
Zito, M
Purohit, MV
Weidemann, AW
Wilson, JR
Yumiceva, FX
Aston, D
Bartoldus, R
Berger, N
Boyarski, AM
Buchmueller, OL
Claus, R
Convery, MR
Cristinziani, M
De Nardo, G
Dong, D
Dorfan, J
Dujmic, D
Dunwoodie, W
Elsen, EE
Fan, S
Field, RC
Glanzman, T
Gowdy, SJ
Hadig, T
Halyo, V
Hast, C
Hryn'ova, T
Innes, WR
Kelsey, MH
Kim, P
Kocian, ML
Leith, DWGS
Libby, J
Luitz, S
Luth, V
Lynch, HL
Marsiske, H
Messner, R
Muller, DR
O'Grady, CP
Ozcan, VE
Perazzo, A
Perl, M
Petrak, S
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Schwiening, J
Simi, G
Snyder, A
Soha, A
Stelzer, J
Su, D
Sullivan, MK
Va'vra, J
Wagner, SR
Weaver, M
Weinstein, AJR
Wisniewski, WJ
Wittgen, M
Wright, DH
Yarritu, AK
Young, CC
Burchat, PR
Edwards, AJ
Meyer, TI
Petersen, BA
Roat, C
Ahmed, S
Alam, MS
Ernst, JA
Saeed, MA
Saleem, M
Wappler, FR
Bugg, W
Krishnamurthy, M
Spanier, SM
Eckmann, R
Kim, H
Ritchie, JL
Satpathy, A
Schwitters, RF
Izen, JM
Kitayama, I
Lou, XC
Ye, S
Bianchi, F
Bona, M
Gallo, F
Gamba, D
Bosisio, L
Cartaro, C
Cossutti, F
Della Ricca, G
Dittongo, S
Grancagnolo, S
Lanceri, L
Poropat, P
Vitale, L
Vuagnin, G
Panvini, RS
Banerjee, S
Brown, CM
Fortin, D
Jackson, PD
Kowalewski, R
Roney, JM
Sobie, RJ
Band, HR
Cheng, B
Dasu, S
Datta, M
Eichenbaum, AM
Graham, M
Hollar, JJ
Johnson, JR
Kutter, PE
Li, H
Liu, R
Mihalyi, A
Mohapatra, AK
Pan, Y
Prepost, R
Tan, P
von Wimmersperg-Toeller, JH
Wu, J
Wu, SL
Yu, Z
Greene, MG
Neal, H
CA BABAR Collaboration
TI Search for flavor-changing neutral current and lepton-flavor violating
decays of D-0 -> l(+)l(-)
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DETECTOR
AB We report on a search for the flavor-changing neutral current decays D-0-->e(+)e(-) and D-0-->mu(+)mu(-), and the lepton-flavor violating decay D-0-->e(+/-)mu(-/+). The measurement is based on 122 fb(-1) of data collected by the BABAR detector at the SLAC PEP-II asymmetric e(+)e(-) collider. No evidence is found for any of the decays. The upper limits on the branching fractions, at the 90% confidence level, are 1.2x10(-6) for D-0-->e(+)e(-), 1.3x10(-6) for D-0-->mu(+)mu(-), and 8.1x10(-7) for D-0-->e(+/-)mu(-/+).
C1 Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France.
Univ Bari, Dipartimento Fis, I-70126 Bari, Italy.
Ist Nazl Fis Nucl, I-70126 Bari, Italy.
Inst High Energy Phys, Beijing 100039, Peoples R China.
Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany.
Univ Bristol, Bristol BS8 1TL, Avon, England.
Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
Brunel Univ, Uxbridge UB8 3PH, Middx, England.
Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
Univ Calif Irvine, Irvine, CA 92697 USA.
Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
Univ Calif Riverside, Riverside, CA 92521 USA.
Univ Calif San Diego, La Jolla, CA 92093 USA.
Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA.
CALTECH, Pasadena, CA 91125 USA.
Univ Cincinnati, Cincinnati, OH 45221 USA.
Univ Colorado, Boulder, CO 80309 USA.
Colorado State Univ, Ft Collins, CO 80523 USA.
Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
Ecole Polytech, LLR, F-91128 Palaiseau, France.
Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy.
Ist Nazl Fis Nucl, I-44100 Ferrara, Italy.
Florida A&M Univ, Tallahassee, FL 32307 USA.
Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy.
Ist Nazl Fis Nucl, I-16146 Genoa, Italy.
Harvard Univ, Cambridge, MA 02138 USA.
Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany.
Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England.
Univ Iowa, Iowa City, IA 52242 USA.
Iowa State Univ, Ames, IA 50011 USA.
Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
Ist Nazl Fis Nucl, I-06100 Perugia, Italy.
Lab Accelerateur Lineaire, F-91898 Orsay, France.
Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
Univ Liverpool, Liverpool L69 72E, Merseyside, England.
Univ London, Queen Mary, London E1 4NS, England.
Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England.
Univ Louisville, Louisville, KY 40292 USA.
Univ Manchester, Manchester M13 9PL, Lancs, England.
Univ Maryland, College Pk, MD 20742 USA.
Univ Massachusetts, Amherst, MA 01003 USA.
MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
McGill Univ, Montreal, PQ H3A 2T8, Canada.
Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
Ist Nazl Fis Nucl, I-20133 Milan, Italy.
Univ Mississippi, University, MS 38677 USA.
Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada.
Mt Holyoke Coll, S Hadley, MA 01075 USA.
Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy.
Ist Nazl Fis Nucl, I-80126 Naples, Italy.
Natl Inst Nucl Phys & High Energy Phys, NIKHEF, NL-1009 DB Amsterdam, Netherlands.
Univ Notre Dame, Notre Dame, IN 46556 USA.
Ohio State Univ, Columbus, OH 43210 USA.
Univ Oregon, Eugene, OR 97403 USA.
Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
Ist Nazl Fis Nucl, I-35131 Padua, Italy.
Univ Paris 06, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France.
Univ Paris 07, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France.
Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy.
Ist Nazl Fis Nucl, I-27100 Pavia, Italy.
Univ Penn, Philadelphia, PA 19104 USA.
Univ Pisa, Dipartimento Fis, Scuola Normale Super Pisa, I-56127 Pisa, Italy.
Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
Prairie View A&M Univ, Prairie View, TX 77446 USA.
Princeton Univ, Princeton, NJ 08544 USA.
Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
Ist Nazl Fis Nucl, I-00185 Rome, Italy.
Univ Rostock, D-18051 Rostock, Germany.
Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France.
Univ S Carolina, Columbia, SC 29208 USA.
Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
Stanford Univ, Stanford, CA 94305 USA.
SUNY Albany, Albany, NY 12222 USA.
Univ Tennessee, Knoxville, TN 37996 USA.
Univ Texas, Austin, TX 78712 USA.
Univ Texas, Richardson, TX 75083 USA.
Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
Ist Nazl Fis Nucl, I-10125 Turin, Italy.
Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
Ist Nazl Fis Nucl, I-34127 Trieste, Italy.
Vanderbilt Univ, Nashville, TN 37235 USA.
Univ Victoria, Victoria, BC V8W 3P6, Canada.
Univ Wisconsin, Madison, WI 53706 USA.
Yale Univ, New Haven, CT 06511 USA.
Univ Basilicata, I-85100 Potenza, Italy.
Univ Valencia, CSIC, Inst Fis Corpuscular, IFIC, Valencia, Spain.
RP Aubert, B (reprint author), Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France.
RI de Groot, Nicolo/A-2675-2009; Cavallo, Nicola/F-8913-2012; Saeed,
Mohammad Alam/J-7455-2012; Negrini, Matteo/C-8906-2014; Lista,
Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; crosetti,
nanni/H-3040-2011; Neri, Nicola/G-3991-2012; Forti,
Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani,
Claudia/C-5223-2009; de Sangro, Riccardo/J-2901-2012; Sarti,
Alessio/I-2833-2012; Della Ricca, Giuseppe/B-6826-2013; Di Lodovico,
Francesca/L-9109-2016; Calcaterra, Alessandro/P-5260-2015; Frey,
Raymond/E-2830-2016; Monge, Maria Roberta/G-9127-2012; Luppi,
Eleonora/A-4902-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese,
Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal,
F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere,
Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Lusiani,
Alberto/N-2976-2015; Morandin, Mauro/A-3308-2016; Lusiani,
Alberto/A-3329-2016
OI Saeed, Mohammad Alam/0000-0002-3529-9255; Negrini,
Matteo/0000-0003-0101-6963; Bellini, Fabio/0000-0002-2936-660X; Neri,
Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965;
Rotondo, Marcello/0000-0001-5704-6163; Patrignani,
Claudia/0000-0002-5882-1747; de Sangro, Riccardo/0000-0002-3808-5455;
Sarti, Alessio/0000-0001-5419-7951; Della Ricca,
Giuseppe/0000-0003-2831-6982; Di Lodovico,
Francesca/0000-0003-3952-2175; Calcaterra,
Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636;
Monge, Maria Roberta/0000-0003-1633-3195; Luppi,
Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400;
Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal,
F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere,
Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304;
Lusiani, Alberto/0000-0002-6876-3288; Morandin,
Mauro/0000-0003-4708-4240; Lusiani, Alberto/0000-0002-6876-3288
NR 11
TC 2
Z9 2
U1 0
U2 3
PU AMERICAN 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 NOV 5
PY 2004
VL 93
IS 19
AR 191801
DI 10.1103/PhysRevLett.93.191801
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 868PG
UT WOS:000224924900014
ER
PT J
AU Bastea, S
AF Bastea, S
TI Entropy scaling laws for diffusion
SO PHYSICAL REVIEW LETTERS
LA English
DT Editorial Material
ID KOLMOGOROV-SINAI ENTROPY; HARD-SPHERE FLUID; TRANSPORT-COEFFICIENTS;
SIMPLE LIQUIDS
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Bastea, S (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA.
EM bastea2@llnl.gov
NR 9
TC 9
Z9 9
U1 0
U2 3
PU AMERICAN 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 NOV 5
PY 2004
VL 93
IS 19
AR 199603
DI 10.1103/PhysRevLett.93.199603
PG 1
WC Physics, Multidisciplinary
SC Physics
GA 868PG
UT WOS:000224924900088
PM 15600899
ER
PT J
AU Bilodeau, RC
Bozek, JD
Aguilar, A
Ackerman, GD
Turri, G
Berrah, N
AF Bilodeau, RC
Bozek, JD
Aguilar, A
Ackerman, GD
Turri, G
Berrah, N
TI Photoexcitation of He- hollow-ion resonances: Observation of the 2s2p(2)
P-4 state
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ELECTRON-IMPACT IONIZATION; 1S THRESHOLD; AUTOIONIZING STATES; EXCITED
RESONANCES; NEGATIVE-IONS; PHOTODETACHMENT; LITHIUM; REGION; ENERGY;
SPECTROSCOPY
AB Highly correlated states are studied in He-, a fundamental 3-electron system and prototypical negative ion. The 2s2p(2) P-4 state is observed for the first time. This state is detected in a resonant simultaneous double-Auger decay of unprecedented strength. In addition, the first measurements of photodetachment cross sections, positions, widths, and shapes of triply excited resonances in He- are reported. These measurements provide a sensitive test for several sophisticated ab initio calculations, and indicate differences in the position and shape of some structures.
C1 Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA.
Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
Univ Nevada, Dept Phys, Reno, NV 89557 USA.
RP Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA.
RI Bozek, John/E-4689-2010; Bozek, John/E-9260-2010;
OI Bozek, John/0000-0001-7486-7238; Bilodeau, Rene/0000-0001-8607-2328
NR 35
TC 25
Z9 25
U1 1
U2 2
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 NOV 5
PY 2004
VL 93
IS 19
AR 193001
DI 10.1103/PhysRevLett.93.193001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 868PG
UT WOS:000224924900018
PM 15600829
ER
PT J
AU Bouchet, J
Albers, RC
Jones, MD
Jomard, G
AF Bouchet, J
Albers, RC
Jones, MD
Jomard, G
TI Comment on "New pseudophase structure for alpha-Pu" - Reply
SO PHYSICAL REVIEW LETTERS
LA English
DT Editorial Material
ID PLUTONIUM
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
SUNY Buffalo, Dept Phys, Buffalo, NY 14260 USA.
SUNY Buffalo, Ctr Computat Res, Buffalo, NY 14260 USA.
Ctr Etud Bruyeres Le Chatel, Bruyeres Le Chatel, France.
RP Bouchet, J (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
NR 5
TC 1
Z9 1
U1 0
U2 2
PU AMERICAN 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 NOV 5
PY 2004
VL 93
IS 19
AR 199602
DI 10.1103/PhysRevLett.93.199602
PG 1
WC Physics, Multidisciplinary
SC Physics
GA 868PG
UT WOS:000224924900087
ER
PT J
AU Bradley, DK
Eggert, JH
Hicks, DG
Celliers, PM
Moon, SJ
Cauble, RC
Collins, GW
AF Bradley, DK
Eggert, JH
Hicks, DG
Celliers, PM
Moon, SJ
Cauble, RC
Collins, GW
TI Shock compressing diamond to a conducting fluid
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID PRESSURE-TEMPERATURE PHASE; FREE-ENERGY; CARBON; DIAGRAM;
TRANSFORMATION; GRAPHITE; VELOCITY
AB Laser generated shock reflectance data show that diamond undergoes a continuous transition from optically absorbing to reflecting between Hugoniot pressures 600