FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Martellaro, PJ Hurst, SK Larson, R Abbott, EH Peterson, ES AF Martellaro, PJ Hurst, SK Larson, R Abbott, EH Peterson, ES TI Multinuclear nuclear magnetic resonance and X-ray crystallographic investigation of some mixed ligand alkylisocyanide platinum(II) complexes SO INORGANICA CHIMICA ACTA LA English DT Article DE platinum; Pt-195 NMR; isocyanide; tetracyanoplatinate; crystal structure ID ENVIRONMENTAL SENSORS; INFRARED-SPECTROSCOPY; SOLUTION EQUILIBRIA; TETRACYANOPLATINATE(II); SALTS; CRYSTALLINE; DIFFRACTION; COMPOUND; SWITCHES; STACKS AB ingle crystal X-ray diffraction structure determination of tetra-n-butylammonium tricyanomethylisocyanideplatinate(II) (1) show that the complex does not feature stacking of the anions or significant Pt-Pt orbital interactions. The cis-dicyanobismethylisocyanideplatinum(II) (2) and cis-dicyanobisethylisocyanideplatinum(II) (3) complexes do crystallize with the platinum atoms collinear with one another but with a Pt-Pt separation distance on the order of 3.5 angstrom, which is too great for significant orbital overlap. In each of the complexes studied, the Pt-CNR bond lengths of the isocyanides are shorter than the Pt-CN bond lengths of the cyanide ligands. Additionally, each of these complexes have Pt-CNR bond distances marginally shorter than in the parent complex, [Pt(CNR)(4)][BF4](2) (5). The shortened Pt-CNR distances in the mixed complexes are consistent with the isocyanide ligand being a stronger pi-acid than the cyanide ligand, resulting in a preferred cis configuration of the mixed ligand complexes. In solution, the NMR spectra of these complexes are unusual because they display (195)pt-(14) N and H-1- N-14 coupling with high resolution. The NMR parameters of these complexes are compared with those of Pt(CN)(4) (2-) and Pt(CNR)(4)(2+) (R = CH3 or C2H5). (c) 2005 Elsevier B.V. All rights reserved. C1 Montana State Univ, Dept Chem, Bozeman, MT 59717 USA. Sci Mat Corp, Bozeman, MT 59717 USA. Idaho Natl Engn Lab, Idaho Falls, ID 83401 USA. RP Hurst, SK (reprint author), Montana State Univ, Dept Chem, Bozeman, MT 59717 USA. EM shurst@montana.edu; eabbott@montana.edu NR 34 TC 12 Z9 12 U1 1 U2 4 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0020-1693 J9 INORG CHIM ACTA JI Inorg. Chim. Acta PD AUG 1 PY 2005 VL 358 IS 12 BP 3377 EP 3383 DI 10.1016/j.ica.2005.06.024 PG 7 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 958IK UT WOS:000231437700013 ER PT J AU Cook, DR AF Cook, DR TI Lightning strikes SO INTECH LA English DT Letter C1 Argonne Natl Lab, Div Environm Res, Argonne, IL 60439 USA. RP Cook, DR (reprint author), Argonne Natl Lab, Div Environm Res, Argonne, IL 60439 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INSTRUMENT SOCIETY AMERICA PI RES TRIANGLE PK PA 67 ALEXANDER DRIVE, P O BOX 12277, RES TRIANGLE PK, NC 27709 USA SN 0192-303X J9 INTECH JI Intech PD AUG PY 2005 VL 52 IS 8 BP 9 EP 9 PG 1 WC Engineering, Multidisciplinary; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA 956AT UT WOS:000231272000003 ER PT J AU Venkataraman, S Rozhkova, E Eckert, J Schultz, L Sordelet, DJ AF Venkataraman, S Rozhkova, E Eckert, J Schultz, L Sordelet, DJ TI Thermal stability and crystallization kinetics of Cu-reinforced Cu47Ti33Zr11Ni8Si1 metallic glass composite powders synthesized by ball milling: the effect of particulate reinforcement SO INTERMETALLICS LA English DT Article DE glasses, metallic; mechanical alloying and milling; calorimetry; diffraction (electron, neutron and X-ray); microscopy, various ID SUPERCOOLED LIQUID REGION; BULK AMORPHOUS-ALLOYS; GAS-ATOMIZED POWDERS; MATRIX COMPOSITES; WARM EXTRUSION; MECHANICAL-PROPERTIES; CRYSTAL NUCLEATION; ZRC PARTICLES; HIGH-STRENGTH; NI AB The thermal stability and crystallization kinetics of Cu47Ti33Zr11Ni8Si1 gas atomized powder (GAP) and composite powder reinforced with 25 vol.% nanosized Cu second phase particles introduced by ball milling was studied by differential scanning calorimetry in the mode of continuous heating and isothermal annealing. Ball milling leads to successful incorporation of Cu particles within the GAP matrix and hence offers itself as a useful technique to prepare composite microstructures. In the case of continuous heating, both the glass transition temperature T-g and the crystallization temperature T-x display a strong dependence on the heating rate. The activation energy, as determined by the Kissinger equation, for the first order transformation was found to be almost identical for the GAP (3.53 +/- 0.12 eV) and composite powders (3.59 +/- 0.06 eV). The isothermal transformation kinetics were modeled by the Johnson-Mehl-Avrami (JMA) equation. The values of the JMA exponent imply that the crystallization of the metallic glass GAP as well as the composite powder is governed by diffusion-controlled three-dimensional growth. The activation energy of crystallization derived from isothermal annealing experiments is nearly the same for the GAP (3.69 +/- 0.20 eV) and the composite powders (3.78 +/- 0. 10 eV). The addition of Cut particles does not noticeably affect the crystallization kinetics of the amorphous matrix composites. (c) 2005 Elsevier Ltd. All rights reserved. C1 IFW Dresden, Inst Met Werkstoffe, D-01171 Dresden, Germany. Tech Univ Darmstadt, FG Phys Metallkunde, FB 11 Mat & Geowissensch, D-64287 Darmstadt, Germany. Iowa State Univ, Ames Lab, USDOE, Mat & Engn Phys Program, Ames, IA 50014 USA. Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50014 USA. RP Venkataraman, S (reprint author), IFW Dresden, Inst Met Werkstoffe, Postfach 27 00 16, D-01171 Dresden, Germany. EM s.venkataraman@ifw-dresden.de RI Schultz, Ludwig/B-3383-2010 NR 40 TC 28 Z9 28 U1 0 U2 7 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0966-9795 J9 INTERMETALLICS JI Intermetallics PD AUG PY 2005 VL 13 IS 8 BP 833 EP 840 DI 10.1016/j.intermet.2005.01.010 PG 8 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA 928CA UT WOS:000229247500005 ER PT J AU Xie, D Chung, J Waas, AM Shahwan, KW Schroeder, JA Boeman, RG Kunc, V Klett, LB AF Xie, D Chung, J Waas, AM Shahwan, KW Schroeder, JA Boeman, RG Kunc, V Klett, LB TI Failure analysis of adhesively bonded structures: from coupon level data to structural level predictions and verification SO INTERNATIONAL JOURNAL OF FRACTURE LA English DT Article DE adhesively bonded structures; failure analysis; fracture toughness of adhesive; mixed-mode fracture envelope; strain energy release rates; virtual crack closure technique ID STRESS INTENSITY FACTORS; CRACK-CLOSURE TECHNIQUE; ENERGY-RELEASE RATES; LAP SHEAR JOINT; STIFFNESS PREDICTION; FRACTURE; SPECIMENS; COMPOSITES AB This paper presents a predictive methodology and verification through experiment for the analysis and failure of adhesively bonded, hat stiffened Structures using Coupon level input data. The hats were made of steel and carbon fiber reinforced polymer composite, respectively, and bonded to steel adherends. A critical strain energy release rate criterion was used to predict the failure loads of the structure. To account for significant geometrical changes observed in the structural level test, an adaptive virtual crack closure technique based oil ail updated local coordinate system at the crack tip was developed to calculate the strain energy release rates. Input data for critical strain energy release rates as a function of mode mixity was obtained by carrying Out coupon level mixed mode fracture tests using the Fernlund-Spelt (FS) test fixture. The predicted loads at failure.. along with strains at different locations, were compared with those measured from the structural level tests. The predictions were found to agree well with measurements for multiple replicates of adhesively bonded hat-stiffened Structures made with steel hat/adhesive/steel and composite hat/adhesive/steel, thus validating the proposed methodology for failure prediction. C1 Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA. DaimlerChrysler Corp, Sci Labs, Auburn Hills, MI 48326 USA. GM Corp, Ctr Res & Dev, Warren, MI 48090 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Waas, AM (reprint author), Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA. EM dcw@umich.edu RI Kunc, Vlastimil/E-8270-2017 OI Kunc, Vlastimil/0000-0003-4405-7917 NR 23 TC 15 Z9 17 U1 0 U2 7 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0376-9429 J9 INT J FRACTURE JI Int. J. Fract. PD AUG PY 2005 VL 134 IS 3-4 BP 231 EP 250 DI 10.1007/s10704-005-0646-y PG 20 WC Materials Science, Multidisciplinary; Mechanics SC Materials Science; Mechanics GA 995ZA UT WOS:000234143000003 ER PT J AU Kim, Y Chao, YJ Pechersky, MJ Morgan, MJ AF Kim, Y Chao, YJ Pechersky, MJ Morgan, MJ TI On the effect of hydrogen on the fracture toughness of steel SO INTERNATIONAL JOURNAL OF FRACTURE LA English DT Article DE fracture toughness; hydrogen embrittlement ID ENVIRONMENT EMBRITTLEMENT; STRESS AB A model is developed to quantify the effect of hydrogen on the critical stress intensity factor or fracture toughness of steels. The stress-assisted hydrogen diffusion model proposed by Liu (1970) is assumed and combined with the elastic stress field around the crack tip for quantifying the hydrogen concentration at the crack tip. Introducing a fracture criterion as the critical hydrogen concentration at a critical distance ahead of the crack tip, this model is successfully applied to the interpretation of hydrogen embrittlement behavior in a piping material. Experimental data at constant temperature were used to validate the model. With further development, the model has the potential to predict fracture toughness values at temperatures other than the test temperature. C1 Univ S Carolina, Dept Mech Engn, Columbia, SC 29208 USA. Savannah River Ecol Lab, Aiken, SC 29808 USA. RP Chao, YJ (reprint author), Univ S Carolina, Dept Mech Engn, 300 Main St, Columbia, SC 29208 USA. EM chao@sc.edu NR 22 TC 10 Z9 10 U1 0 U2 7 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0376-9429 J9 INT J FRACTURE JI Int. J. Fract. PD AUG PY 2005 VL 134 IS 3-4 BP 339 EP 347 DI 10.1007/s10704-005-1974-7 PG 9 WC Materials Science, Multidisciplinary; Mechanics SC Materials Science; Mechanics GA 995ZA UT WOS:000234143000008 ER PT J AU Joslyn, C Kreinovich, V AF Joslyn, C Kreinovich, V TI Convergence properties of an interval probabilistic approach to system reliability estimation SO INTERNATIONAL JOURNAL OF GENERAL SYSTEMS LA English DT Article DE interval probability; interval analysis; reliability analysis; Dempster-Shafer evidence theory; random sets; random intervals AB Based on a black box model of a complex system, and on intervals and probabilities describing the known information about the inputs, we want to estimate the system's reliability. This problem is motivated by a number of problem areas, most specifically in engineering reliability analysis under conditions of poor measurement and high complexity of system models. Using the results of tests performed on the system's computer model, we can estimate the lower and upper bounds of the probability that the system is in a desirable state. This is equivalent to using Monte-Carlo sampling to estimate cumulative belief and plausibility values of functionally propagated finite random intervals. In this paper, we prove that these estimates are correct in the sense that under reasonable assumptions, these estimates converge to the actual probability bounds. C1 Los Alamos Natl Lab, Knowledge & Informat Syst Sci Team, Modeling Algorithms & Informat Grp CCS 3, Los Alamos, NM 87545 USA. Univ Texas, Dept Comp Sci, El Paso, TX 79968 USA. RP Joslyn, C (reprint author), Los Alamos Natl Lab, Knowledge & Informat Syst Sci Team, Modeling Algorithms & Informat Grp CCS 3, Mail Stop B265, Los Alamos, NM 87545 USA. EM joslyn@lanl.gov; vladik@cs.utep.edu NR 13 TC 6 Z9 7 U1 1 U2 3 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0308-1079 J9 INT J GEN SYST JI Int. J. Gen. Syst. PD AUG PY 2005 VL 34 IS 4 BP 465 EP 482 DI 10.1080/03081070500033880 PG 18 WC Computer Science, Theory & Methods; Ergonomics SC Computer Science; Engineering GA 982NU UT WOS:000233169700005 ER PT J AU Shaddix, CR Palotas, AB Megaridis, CM Choi, MY Yang, NYC AF Shaddix, CR Palotas, AB Megaridis, CM Choi, MY Yang, NYC TI Soot graphitic order in laminar diffusion flames and a large-scale JP-8 pool fire SO INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER LA English DT Article DE soot; HRTEM; diffusion flame; pool fire; interlayer spacing; optical properties ID CHAR THERMAL DEACTIVATION; NEAR-INFRARED SPECTRUM; REFRACTIVE-INDEX; FULLERENIC NANOSTRUCTURES; SCATTERING PROPERTIES; PRECURSOR PARTICLES; ELECTRON-MICROSCOPY; OPTICAL-PROPERTIES; AMORPHOUS-CARBON; LIGHT-SCATTERING AB High-resolution transmission electron microscopy (HRTEM) has been performed on soot samples collected from two smoking laminar ethylene diffusion flames (one steady and one unsteady) and from the active-flaming region of a 5-m diameter JP-8 pool fire. The motivation for this study is to improve the understanding of the influence of soot microstructure on its optical properties. The soot sampling positions in the steady ethylene flame correspond to locations of maximum soot mass growth, partial soot oxidation, and quenched oxidation along a common streamline. Visual examination of the HRTEM images suggests that the graphitic crystalline layers of soot undergo increased densification along the sampled streamline in the steady laminar flame. Quantitative image analysis reveals a small decrease in the mean graphitic interlayer spacing (d(002)) with increasing residence time in the high-temperature region. However, the differences in the mean interlayer spacing are far smaller than the spread of interlayer spacings measured for any given soot sample. Post-flame samples from the unsteady ethylene flame show interlayer spacing distributions similar to the lower region of the steady flame. The soot samples from the pool fire show little evidence of oxidized soot and have interlayer spacings similar to the unsteady ethylene flame. Previous research in the carbon black field has demonstrated a direct relation between the graphitic interlayer spacing and the optical absorptivity of the carbon. Consequently, the current HRTEM results offer support to recent measurements of the dimensionless extinction coefficient of soot that suggest that the optical absorptivity of agglomerating soot shows only minor variations for different fuels and flame types. (c) 2005 Elsevier Ltd. All rights reserved. C1 Sandia Natl Labs, Combust Res Facil, Livermore, CA 94550 USA. Univ Miskolc, Dept Combust Technol, H-3515 Miskolc, Hungary. Univ Illinois, Dept Mech & Ind Engn, Chicago, IL 60607 USA. Drexel Univ, Dept Mech Engn & Mech, Philadelphia, PA 19104 USA. Sandia Natl Labs, Analyt Mat Sci Dept, Livermore, CA 94550 USA. RP Sandia Natl Labs, Combust Res Facil, MS 9052,7011 E Ave, Livermore, CA 94550 USA. EM crshadd@sandia.gov OI Megaridis, Constantine/0000-0002-6339-6933 NR 66 TC 33 Z9 33 U1 1 U2 9 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0017-9310 EI 1879-2189 J9 INT J HEAT MASS TRAN JI Int. J. Heat Mass Transf. PD AUG PY 2005 VL 48 IS 17 BP 3604 EP 3614 DI 10.1016/j.ijheattransfer.2005.03.006 PG 11 WC Thermodynamics; Engineering, Mechanical; Mechanics SC Thermodynamics; Engineering; Mechanics GA 948HI UT WOS:000230706300010 ER PT J AU Gnaser, H Savina, MR Calaway, WF Tripa, CE Veryovkin, IV Pellin, MJ AF Gnaser, H Savina, MR Calaway, WF Tripa, CE Veryovkin, IV Pellin, MJ TI Photocatalytic degradation of methylene blue on nanocrystalline TiO2: Surface mass spectrometry of reaction intermediates SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY LA English DT Article DE photocatalysis; nanocrystalline TiO2; surface mass spectrometry; methylene blue ID SEMICONDUCTOR PHOTOCATALYSIS; THIN-FILMS; HETEROGENEOUS PHOTOCATALYSIS; TITANIUM-DIOXIDE; DYE POLLUTANTS; AZO-DYE; WATER; PHOTODEGRADATION; OXIDATION; DECOMPOSITION AB Photocatalytic degradation reactions of methylene blue on nanocrystalline TiO2 (nc-TiO2) films were studied in situ by surface mass spectrometric techniques including secondary ion mass spectrometry, laser desorption direct ion mass spectrometry, and laser desorption/laser photoion mass spectrometry. The parent ion of methylene blue and/or its reduced form leucomethylene blue was observed with little fragmentation by all methods prior to ultraviolet exposure. The surface composition changed upon ultraviolet (UV) irradiation in air, an observation ascribed to photocatalytic reactions induced by UV photons: the parent molecule signal diminished and intermediate reaction products such as sulfoxides and sulfones were detected from the TiO2 surface. After prolonged UV irradiation these species also vanished and the methylene blue appeared to be almost completely mineralized. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Kaiserslautern, Dept Phys, D-67663 Kaiserslautern, Germany. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Gnaser, H (reprint author), Univ Kaiserslautern, Dept Phys, D-67663 Kaiserslautern, Germany. EM gnaser@rhrk.uni-kl.de RI Pellin, Michael/B-5897-2008 OI Pellin, Michael/0000-0002-8149-9768 NR 41 TC 61 Z9 63 U1 3 U2 23 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1387-3806 J9 INT J MASS SPECTROM JI Int. J. Mass Spectrom. PD AUG 1 PY 2005 VL 245 IS 1-3 BP 61 EP 67 DI 10.1016/j.ijms.2005.07.003 PG 7 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA 969MT UT WOS:000232239000008 ER PT J AU Jobson, BT Alexander, ML Maupin, GD Muntean, GG AF Jobson, BT Alexander, ML Maupin, GD Muntean, GG TI On-line analysis of organic compounds in diesel exhaust using a proton transfer reaction mass spectrometer (PTR-MS) SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY LA English DT Article DE VOC; hydrocarbons; PTR-MS; diesel exhaust; chemical ionization; proton transfer ID ION FLOW TUBE; RATE CONSTANTS; EMISSIONS; H3O+; NO+; AFTERTREATMENT; HYDROCARBONS; MOLECULES; VEHICLE; O-2(+) AB Chemical ionization mass spectrometry using H3O+ proton transfer in an ion drift tube (PTR-MS) was used to measure volatile organic compound (VOC) concentrations on-line in diesel engine exhaust as a function of engine load. The purpose of the study was to evaluate the PTR-MS instrument as an analytical tool for diesel engine emissions abatement research. Measured sensitivities determined from gas standards were found to agree well with calculated sensitivities for non-polar species. A slight humidity dependent sensitivity was observed for non-polar species, implying that reactions with H+(H2O)(2) were important for some organics. The diesel exhaust mass spectra were complex but displayed a pattern of strong ion signals at 14n + 1 (n = 3.8) masses, with a relative ion abundance similar to that obtained from electron impact ionization of alkanes. Laboratory experiments verified that C-8-C-16 n-alkanes and C-8-C-13 1-alkenes react with H3O+ in dissociative proton transfer reaction resulting in alkyl cation ion products, primarily m/z 41, 43, 57, 71 and 85. Monitoring the sum of these ion signals may be useful for estimating alkane emissions from unburnt diesel fuel. Alkane fragmentation likely simplified the diesel exhaust mass spectrum and reduced potential mass interferences with isobaric aromatic compounds. Concentrations of aldehydes and ketones dominated those of aromatic species with formaldehyde and acetaldehyde estimated to be the most abundant VOCs in the PTR-MS mass spectrum at all engine loads. The relative abundances of benzene and toluene increased with engine load indicating their pyrogenic origin. The relative abundance of alkanes, aromatics, aldehydes and alcohols was broadly consistent with literature publications of diesel exhaust analysis by gas chromatography. About 75% of the organic ion signal could be assigned. On-line analysis of diesel exhaust using this technology may be valuable tool for diesel engine emission research. (c) 2005 Elsevier B.V. All rights reserved. C1 Battelle Pacific NW, Richland, WA USA. RP Jobson, BT (reprint author), Battelle Pacific NW, POB 999, Richland, WA USA. EM tom.jobson@pnl.gov; michael.alexander@pnl.gov; gary.maupin@pnl.gov; george.muntean@pnl.gov OI Jobson, Bertram/0000-0003-1812-9745 NR 31 TC 43 Z9 46 U1 3 U2 30 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1387-3806 J9 INT J MASS SPECTROM JI Int. J. Mass Spectrom. PD AUG 1 PY 2005 VL 245 IS 1-3 BP 78 EP 89 DI 10.1016/j.ijms.2005.05.009 PG 12 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA 969MT UT WOS:000232239000010 ER PT J AU Loh, EY Gubernatis, JE Scalettar, RT White, SR Scalapino, DJ Sugar, RL AF Loh, EY Gubernatis, JE Scalettar, RT White, SR Scalapino, DJ Sugar, RL TI Numerical stability and the sign problem in the determinant quantum Monte Carlo method SO INTERNATIONAL JOURNAL OF MODERN PHYSICS C LA English DT Article DE quantum Monte Carlo; Hubbard model; sign problem; high temperature superconductivity ID D-WAVE-SUPERCONDUCTIVITY; HUBBARD-MODEL; SIMULATION; SYSTEMS; NONEXISTENCE AB A recent paper by Matuttis and Ito questions the numerical accuracy of a widely-used fermion Monte Carlo algorithm. They also claim that the increase in the d-wave pairfield susceptibility chi(d)(T) of a doped 4 x 4 Hubbard model at low temperature, previously found using this algorithm, is an artifact due to numerical errors. Here, we provide tests which show that this algorithm is numerically accurate and show that the simulation of chi(d) for a 2 x 2 lattice agrees with exact diagonalization results. We also provide more complete data for chi(d) on a 4 x 4 lattice that is consistent with our previous results. C1 Sun Microsyst Inc, Menlo Pk, CA USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. Univ Calif Irvine, Dept Phys, Irvine, CA 92697 USA. Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA. RP Loh, EY (reprint author), Sun Microsyst Inc, Menlo Pk, CA USA. EM eugene@east.sun.com; jeg@viking.lanl.gov; rts@sherlock.physics.ucdavis.edu; srw@merlin2.ps.uci.edu; djs@vulcan2.physics.ucsb.edu; sugar@physics.ucsb.edu RI White, Steven/B-4760-2008 OI White, Steven/0000-0003-3496-0707 NR 10 TC 4 Z9 4 U1 0 U2 1 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0129-1831 J9 INT J MOD PHYS C JI Int. J. Mod. Phys. C PD AUG PY 2005 VL 16 IS 8 BP 1319 EP 1327 DI 10.1142/S0129183105007911 PG 9 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 971JT UT WOS:000232380800011 ER PT J AU Cavalier, L Hengartner, NW AF Cavalier, L Hengartner, NW TI Adaptive estimation for inverse problems with noisy operators SO INVERSE PROBLEMS LA English DT Article ID HILBERT SCALES; REGULARIZATION; ALGORITHM; RATES AB Consider an inverse problem with random noise where we want to estimate a function f. Moreover, suppose that the operator A that we need to invert is not completely known: we know its eigenfunctions and observe its singular values but with some noise. To construct our estimator theta*, we minimize a modification of an unbiased risk estimator. We obtain some non-asymptotic exact oracle inequalities. Considering smooth functions in some standard classes of functions, we prove that theta* is asymptotically minimax among a given class of estimators. C1 Univ Aix Marseille 1, CMI, F-13453 Marseille, France. Los Alamos Natl Lab, Dept Stat, Los Alamos, NM USA. RP Cavalier, L (reprint author), Univ Aix Marseille 1, CMI, 39 Rue Joliot Curie, F-13453 Marseille, France. EM cavalier@cmi.univ-mrs.fr; nickh@lanl.gov NR 22 TC 33 Z9 33 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0266-5611 J9 INVERSE PROBL JI Inverse Probl. PD AUG PY 2005 VL 21 IS 4 BP 1345 EP 1361 DI 10.1088/0266-5611/21/4/010 PG 17 WC Mathematics, Applied; Physics, Mathematical SC Mathematics; Physics GA 960SE UT WOS:000231612700011 ER PT J AU Bhuvanesh, NSP Reibenspies, JH Zhang, YG Lee, PL AF Bhuvanesh, NSP Reibenspies, JH Zhang, YG Lee, PL TI A novel strategy for ab initio structure determination using micro-powder X-ray diffraction: structure solution and refinement of 3-bromophenylboronic acid and tris(4-bromophenyl) boroxine SO JOURNAL OF APPLIED CRYSTALLOGRAPHY LA English DT Article ID DETECTOR SYSTEMS; CALIBRATION; DISTORTIONS AB Micro-powder X-ray diffraction patterns of two compounds, namely 3-bromo-phenylboronic acid and tris(4-bromophenyl) boroxine, were recorded with microgram quantities of sample using a recently developed method employing nylon loops with synchrotron radiation and an image-plate detector. This method, besides using small amount of samples, offers the advantage of recording the powder pattern in the shortest possible time ( less than a minute). The structures of the two compounds have been solved by ab initio methods using real-space techniques ( simulated annealing and/or parallel tempering) followed by Rietveld refinements with soft restraints on the bond lengths of the rigid bodies. The former compound crystallizes in the monoclinic system [ a = 15.7797 ( 4), b = 5.3085 ( 2), c = 9.3757 ( 3) angstrom, beta = 93.357 ( 3) degrees; space group P2(1)/c; Z = 4; R-p = 16.060, R-wp = 10.543, R-B = 4.25] with sheets of individual molecules linked through an extended hydrogen-bonding network. Tris( 4-bromophenyl)boroxine, displaying molecular disorder, crystallizes in the orthorhombic system [a = 18.9289 (6), b = 21.8872 ( 6), c = 4.8842 ( 2) angstrom; space group Pnma; Z= 4; R-p = 13.270, R-wp = 12.083, R-B = 6.06], with discrete molecules held by weak van der Waals forces in a zigzag fashion. It is believed that this is the first time that powder X-ray diffraction patterns using microgram samples have been successfully employed for the structure solution and refinement of molecules with reasonable complexity. C1 Texas A&M Univ, Dept Chem, College Stn, TX 77842 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Bhuvanesh, NSP (reprint author), Texas A&M Univ, Dept Chem, College Stn, TX 77842 USA. EM nbhuv@mail.chem.tamu.edu; j-reibenspies@tamu.edu NR 17 TC 10 Z9 10 U1 1 U2 1 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0021-8898 J9 J APPL CRYSTALLOGR JI J. Appl. Crystallogr. PD AUG PY 2005 VL 38 BP 632 EP 638 DI 10.1107/S0021889805015827 PN 4 PG 7 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA 946UH UT WOS:000230598200007 ER PT J AU Welberry, TR Gutmann, MJ Woo, H Goossens, DJ Xu, GY Stock, C Chen, W Ye, ZG AF Welberry, TR Gutmann, MJ Woo, H Goossens, DJ Xu, GY Stock, C Chen, W Ye, ZG TI Single-crystal neutron diffuse scattering and Monte Carlo study of the relaxor ferroelectric PbZn(1/3)Nb(2/3)O(3()PZN) SO JOURNAL OF APPLIED CRYSTALLOGRAPHY LA English DT Article ID X-RAY; DIFFRACTION AB Full three-dimensional diffuse neutron scattering data have been recorded from a single crystal of Pb(Zn1/3Nb2/3) O-3 (PZN) at 300 Kusing the time-of-flight Laue technique on the SXD single-crystal instrument at ISIS. The data show a series of diffuse rods of scattering oriented parallel to each of the six [110] crystal directions. Monte Carlo simulation has been used to demonstrate that the diffuse rods are caused by planar nanodomains oriented normal to the [110] directions. Within these domains, there are correlated displacements of the atoms away from their average site positions. In order to explain the systematic absence of some rods of scattering in the ( h k 1) data but the presence of all rods in the ( h k 0) data, it is necessary that the displacement of an O atom is of opposite sign to that of its neighbouring Pb atoms. This is explained in terms of a model based on the fact that Pb2+ possesses a lone pair of electrons, giving the Pb ion directionality. C1 Australian Natl Univ, Res Sch Chem, Canberra, ACT 0200, Australia. Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada. Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada. RP Welberry, TR (reprint author), Australian Natl Univ, Res Sch Chem, Canberra, ACT 0200, Australia. EM welberry@rsc.anu.edu.au RI Xu, Guangyong/A-8707-2010; Welberry, Thomas/H-7847-2014; OI Xu, Guangyong/0000-0003-1441-8275; Welberry, Thomas/0000-0002-6906-9191; Goossens, Darren/0000-0003-0776-2692 NR 18 TC 42 Z9 42 U1 1 U2 16 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0021-8898 EI 1600-5767 J9 J APPL CRYSTALLOGR JI J. Appl. Crystallogr. PD AUG PY 2005 VL 38 BP 639 EP 647 DI 10.1107/S0021889805015918 PN 4 PG 9 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA 946UH UT WOS:000230598200008 ER PT J AU Zheng, JC Zhu, YM Wu, LJ Davenport, JW AF Zheng, JC Zhu, YM Wu, LJ Davenport, JW TI On the sensitivity of electron and X-ray scattering factors to valence charge distributions SO JOURNAL OF APPLIED CRYSTALLOGRAPHY LA English DT Article ID DIFFRACTION; DENSITY; POTENTIALS; GERMANIUM; MAGNESIUM; CRYSTALS; EXCHANGE; ACCURATE; SILICON; GAS AB The sensitivity of atomic scattering factors to valence charge distributions has been compared quantitatively for X-ray and electron diffraction. It is found that below a critical scattering vector, s (| s| = sin theta/lambda), ranging typically from 0.2 to 0.6 angstrom(-1) depending on the atomic number, electron diffraction is more sensitive to valence charge densities than X-ray diffraction. Thus, electron diffraction provides crucial electronic structure information via the low-order structure factors, which are relatively insensitive to thermal vibrations, but sensitive to the charge distribution that characterizes the chemical bonding properties of the materials. On the other hand, the high-order structure factors, which are mainly influenced by atomic position and core charge, in many cases can be replaced by structure factors of a procrystal (superposition of neutral atoms), or by calculated structure factors from modern density functional theory (DFT), without losing significant accuracy. This is demonstrated by detailed analyses of an MgB2 superconductor. The work reveals the importance of accurate determination of a very few low-order structure factors in valence electron density studies, and suggests the merit of the combined use of electron diffraction and DFT calculations for solids, especially those with large unit cells and nanocrystalline grains, unsuitable for X-ray studies. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Brookhaven Natl Lab, Upton, NY 11973 USA. EM zhu@bnl.gov RI Zheng, JC/G-3383-2010 OI Zheng, JC/0000-0002-6292-3236 NR 27 TC 9 Z9 12 U1 0 U2 2 PU INT UNION CRYSTALLOGRAPHY PI CHESTER PA 2 ABBEY SQ, CHESTER, CH1 2HU, ENGLAND SN 1600-5767 J9 J APPL CRYSTALLOGR JI J. Appl. Crystallogr. PD AUG PY 2005 VL 38 BP 648 EP 656 DI 10.1107/S0021889805016109 PN 4 PG 9 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA 946UH UT WOS:000230598200009 ER PT J AU Hart, SC Classen, AT Wright, RJ AF Hart, SC Classen, AT Wright, RJ TI Long-term interval burning alters fine root and mycorrhizal dynamics in a ponderosa pine forest SO JOURNAL OF APPLIED ECOLOGY LA English DT Article DE Arizona; ecological restoration; ectomycorrhizae; fine roots; prescribed fire ID PRESCRIBED-FIRE; ECOLOGICAL RESTORATION; ECTOMYCORRHIZAL FUNGI; BUNCHGRASS ECOSYSTEM; EXTERNAL MYCELIUM; SOIL; NITROGEN; DECOMPOSITION; BIOMASS; GROWTH AB 1. Plant roots and their mycorrhizal symbionts are critical components of forest ecosystems, being largely responsible for soil resource acquisition by plants and the maintenance of soil structure, as well as influencing soil nutrient cycling. Silvicultural treatments should be guided by knowledge of how these below-ground components respond to different forest management practices. 2. We examined the cumulative effects of 20 years of prescribed burning at 2-year intervals. We measured fine root length density and fine root and mycorrhizal root biomass in the upper 15 cm of mineral soil in a south-western ponderosa pine forest over a complete burn cycle. 3. Repeated burning reduced fine root length, fine root biomass and mycorrhizal root biomass, as well as the amount of nitrogen and phosphorus stored in these below-ground pools. 4. Estimates of fine root production, fine root decomposition and nutrient dynamics were similar in burned and control plots. 5. Synthesis and applications. Although repeated-prescribed fire may be an effective, low-cost approach for reducing fuel loads and lessening the chance of a catastrophic wildfire in ponderosa pine forests, our results suggest that this strategy may negatively affect below-ground biomass pools and nutrient cycling processes in the long term. We recommend that mechanical reductions in fuel loads be conducted in these and similar forests that have not experienced fire for decades, before fire is reintroduced as a management tool. C1 No Arizona Univ, Sch Forestry, Flagstaff, AZ 86011 USA. No Arizona Univ, Merriam Powell Ctr Environm Res, Flagstaff, AZ 86011 USA. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. RP Hart, SC (reprint author), No Arizona Univ, Sch Forestry, Flagstaff, AZ 86011 USA. EM steve.hart@nau.edu RI Classen, Aimee/C-4035-2008 OI Classen, Aimee/0000-0002-6741-3470 NR 48 TC 30 Z9 36 U1 0 U2 18 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0021-8901 J9 J APPL ECOL JI J. Appl. Ecol. PD AUG PY 2005 VL 42 IS 4 BP 752 EP 761 DI 10.1111/j.1365-2664.2005.01055.x PG 10 WC Biodiversity Conservation; Ecology SC Biodiversity & Conservation; Environmental Sciences & Ecology GA 946VT UT WOS:000230602100015 ER PT J AU Kassianov, E Long, CN Christy, J AF Kassianov, E Long, CN Christy, J TI Cloud-base-height estimation from paired ground-based hemispherical observations SO JOURNAL OF APPLIED METEOROLOGY LA English DT Article ID STOCHASTIC RADIATIVE-TRANSFER; OPTICAL DEPTH; IRRADIANCE; IMPACT AB Total-sky imager (TSI) and hemispheric-sky imager (HSI) each have a hemispherical field of view, and many TSIs are now deployed. These instruments have been used routinely to provide a time series of the fractional sky cover only. In this study, the possible retrieval of cloud-base height (CBH) from TSI surface observations is examined. This paper presents a validation analysis of a new retrieval using both a model-output inverse problem and independent, ground-based micropulse lidar data. The obtained results suggest that, at least for single-layer cloud fields, moderately accurate (within similar to 0.35 km) CBH retrieval is possible. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Kassianov, E (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd,POB 999, Richland, WA 99352 USA. EM evgueni.kassianov@pnl.gov NR 19 TC 27 Z9 30 U1 0 U2 2 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0894-8763 J9 J APPL METEOROL JI J. Appl. Meteorol. PD AUG PY 2005 VL 44 IS 8 BP 1221 EP 1233 DI 10.1175/JAM2277.1 PG 13 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 961ZR UT WOS:000231701300005 ER PT J AU Barmak, K Kim, J Lewis, LH Coffey, KR Toney, MF Kellock, AJ Thiele, JU AF Barmak, K Kim, J Lewis, LH Coffey, KR Toney, MF Kellock, AJ Thiele, JU TI On the relationship of magnetocrystalline anisotropy and stoichiometry in epitaxial L1(0) CoPt (001) and FePt (001) thin films SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID PERPENDICULAR MAGNETIC-ANISOTROPY; GROWTH TEMPERATURE-DEPENDENCE; RECORDING MEDIA; ORDERING TEMPERATURE; GRANULAR FILMS; GRAIN-GROWTH; EQUIATOMIC COMPOSITION; FE/PT MULTILAYERS; DOMAIN-STRUCTURE; PLATINUM COBALT AB Two series of epitaxial CoPt and FePt films, with nominal thicknesses of 42 or 50 nm, were prepared by sputtering onto single-crystal MgO(001) substrates in order to investigate the chemical ordering and the resultant magnetic properties as a function of alloy composition. In the first series, the film composition was kept constant, while the substrate temperature was increased from 144 to 704 degrees C. In the second series the substrate temperature was kept constant at 704 degrees C for CoPt and 620 degrees C for FePt, while the alloy stoichiometry was varied in the nominal range of 40-60-at. % Co(Fe). Film compositions and thicknesses were measured via Rutherford backscattering spectrometry. The lattice and long-range order parameter for the L1(0) phase were obtained for both sets of films using x-ray diffraction. The room-temperature magnetocrystalline anisotropy constants were determined for a subset of the films using torque magnetometry. The order parameter was found to increase with increasing temperature, with ordering occurring more readily in FePt when compared with CoPt. A perpendicular anisotropy developed in CoPt for substrate temperatures above 534 degrees C and in FePt above 321 degrees C. The structure and width of the magnetic domains in CoPt and FePt, as seen by magnetic force microscopy, also demonstrated an increase in magnetic anisotropy with increasing temperature. For the films deposited at the highest temperatures (704 degrees C for CoPt and 620 degrees C for FePt), the order parameter reached a maximum near the equiatomic composition, whereas the magnetocrystalline anisotropy increased as the concentration of Co or Fe was increased from below to slightly above the equiatomic composition. It is concluded that nonstoichiometric L1(0) CoPt and FePt, with a slight excess of Co or Fe, are preferable for applications requiring the highest anisotropies. (c) 2005 American Institute of Physics. C1 Carnegie Mellon Univ, Ctr Data Storage Syst, Pittsburgh, PA 15213 USA. Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA. Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA. Univ Cent Florida, Orlando, FL 32816 USA. Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. IBM Corp, Almaden Res Ctr, San Jose, CA 95120 USA. San Jose Res Ctr, Hitachi Global Storage Technol, San Jose, CA 95120 USA. RP Barmak, K (reprint author), Carnegie Mellon Univ, Ctr Data Storage Syst, Pittsburgh, PA 15213 USA. EM katayun@andrew.cmu.edu RI Barmak, Katayun/A-9804-2008 OI Barmak, Katayun/0000-0003-0070-158X NR 92 TC 130 Z9 131 U1 7 U2 61 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 AUG 1 PY 2005 VL 98 IS 3 AR 033904 DI 10.1063/1.1991968 PG 10 WC Physics, Applied SC Physics GA 955RV UT WOS:000231246100066 ER PT J AU Wixom, RR Wright, AF AF Wixom, RR Wright, AF TI N interstitial and its interaction with substitutional Mg in p-type GaN SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID WURTZITE GAN; MOLECULAR-DYNAMICS; NATIVE DEFECTS; HYDROGEN; EXCHANGE; PSEUDOPOTENTIALS; TRANSITION; SURFACES; BARRIERS; VACANCY AB Density-functional theory and the generalized gradient approximation were utilized to investigate the local-energy-minimum configurations and formation energies of N interstitials and their interaction with substitutional Mg in p-type GaN. Along with previously proposed configurations of the N interstitial, a new variant of the split interstitial is discussed. Split interstitials are more stable than the other configurations of the interstitial. The formation energies are such that N interstitials are not expected to form under equilibrium conditions, however, they may form during nonequilibrium processes and become mobile during annealing. The N interstitial is found to bind with substitutional Mg, with the binding energy of the complex being 0.75, 0.53, and 0.35 eV for the +2, +1, and neutral charge states of the complex. (c) 2005 American Institute of Physics. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM rrwixom@sandia.gov NR 37 TC 1 Z9 1 U1 4 U2 11 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 AUG 1 PY 2005 VL 98 IS 3 AR 033704 DI 10.1063/1.1984084 PG 5 WC Physics, Applied SC Physics GA 955RV UT WOS:000231246100048 ER PT J AU Zhu, YT Liao, XZ Srinivasan, SG Lavernia, EJ AF Zhu, YT Liao, XZ Srinivasan, SG Lavernia, EJ TI Nucleation of deformation twins in nanocrystalline face-centered-cubic metals processed by severe plastic deformation SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID MOLECULAR-DYNAMICS SIMULATION; FCC METALS; GRAIN-SIZE; FORMATION MECHANISM; ROOM-TEMPERATURE; AL; COPPER; DISLOCATIONS; ALUMINUM; STRESS AB Nanocrystalline (nc) materials are known to deform via mechanisms not accessible to their coarse-grained counterparts. For example, deformation twins and partial dislocations emitted from grain boundaries have been observed in nc Al and Cu synthesized by severe plastic deformation (SPD). This paper further develops an earlier dislocation-based model on the nucleation of deformation twins in nc face-centered-cubic (fcc) metals. It is found that there exists an optimum grain-size range in which deformation twins nucleate most readily. The critical twinning stress is found determined primarily by the stacking fault energy while the optimum grain size is largely determined by ratio of shear modulus to stacking fault energy. This model formulated herein is applicable to fcc nanomaterials synthesized by SPD techniques and provide a lower bound to the critical twining stress. (c) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Chicago, Argonne Natl Lab, Consortium Nanosci Res, Chicago, IL 60637 USA. Univ Calif Davis, Davis, CA 95616 USA. RP Zhu, YT (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM yzhu@lanl.gov RI Zhu, Yuntian/B-3021-2008; Liao, Xiaozhou/B-3168-2009; Lavernia, Enrique/I-6472-2013 OI Zhu, Yuntian/0000-0002-5961-7422; Liao, Xiaozhou/0000-0001-8565-1758; Lavernia, Enrique/0000-0003-2124-8964 NR 44 TC 91 Z9 93 U1 2 U2 58 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 AUG 1 PY 2005 VL 98 IS 3 AR 034319 DI 10.1063/1.2006974 PG 8 WC Physics, Applied SC Physics GA 955RV UT WOS:000231246100104 ER PT J AU Waern, JB Harris, HH Lai, B Cai, ZH Harding, MM Dillon, CT AF Waern, JB Harris, HH Lai, B Cai, ZH Harding, MM Dillon, CT TI Intracellular mapping of the distribution of metals derived from the antitumor metallocenes SO JOURNAL OF BIOLOGICAL INORGANIC CHEMISTRY LA English DT Article DE molybdocene dichloride; niobocene dichloride; X-ray fluorescence; cellular distribution; synchrotron-radiation-induced X-ray emission ID ANTI-TUMOR AGENT; ORGANOMETALLIC ANTICANCER AGENTS; X-RAY MICROPROBE; TITANOCENE DICHLORIDE; MOLYBDOCENE DICHLORIDE; COLORIMETRIC ASSAY; CANCER-CELLS; INHIBITION; SPECTROSCOPY; CHEMISTRY AB The intracellular distribution of transition metals in V79 Chinese hamster lung cells treated with subtoxic doses of the organometallic anticancer complexes Cp2MCl2, where Cp is eta(5)-cyclopentadienyl and M is Mo, Nb, Ti, or V, has been studied by synchrotron-based X-ray fluorescence (XRF). While significantly higher concentrations of Mo and Nb were found in treated cells compared with control cells, distinct differences in the cellular distribution of each metal were observed. Analysis of thin sections of cells was consistent with some localization of Mo in the nucleus. Studies with a noncytotoxic thiol derivative of molybdocene dichloride showed an uneven distribution of Mo in the cells. For comparison, the low levels of Ti and V in cells treated with the more toxic titanocene and vanadocene complexes, respectively, resulted in metal concentrations at the detection limit of XRF. The results agree with independent chemical studies that have concluded that the biological chemistry of each of the metallocene dihalides is unique. C1 Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia. Univ Wollongong, Dept Chem, Wollongong, NSW 2522, Australia. Argonne Natl Lab, Expt Facil Div, Argonne, IL 60439 USA. RP Harding, MM (reprint author), Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia. EM harding@chem.usyd.edu.au; carolynd@uow.edu.au RI Harris, Hugh/A-4983-2008; Waern, Jenny/A-2197-2009; OI Harding, Margaret/0000-0003-1072-3870; Harris, Hugh/0000-0002-3472-8628 NR 42 TC 50 Z9 50 U1 1 U2 14 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0949-8257 J9 J BIOL INORG CHEM JI J. Biol. Inorg. Chem. PD AUG PY 2005 VL 10 IS 5 BP 443 EP 452 DI 10.1007/s00775-005-0649-1 PG 10 WC Biochemistry & Molecular Biology; Chemistry, Inorganic & Nuclear SC Biochemistry & Molecular Biology; Chemistry GA 968BZ UT WOS:000232138200002 PM 15906108 ER PT J AU Drummond, JL De Carlo, F Super, BJ AF Drummond, JL De Carlo, F Super, BJ TI Thiree-dimensional tomography of composite fracture surfaces SO JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS LA English DT Article DE X-ray tomography; fracture interface ID X-RAY TOMOGRAPHY AB The goal of this project was to image the three-dimensional fracture interface of a dental composite with the use of X-ray tomography. With the use of the Advanced Photon Source (APS) at Argonne National Laboratory, three-dimensional images were obtained of the crack interface of a dental composite material that had been subjected to three different treatments: a control, cycled in air, and cycled in a 50150 mixture by volume of ethanol and distilled water. The cycle-loaded treatments were for 100,000 cycles at a load between 80 and 100 N at 5 Hz. The crack interface extended over 28 slices for the control, 96 for the air-cycled specimen, and 83 slices for the 50150 solution cycle specimen. It would appear that the fatiguing of the specimens allowed for an increase in the crack interface as demonstrated by the 3D tomographical analysis. This volume increase in the crack interface is attributed to a separation of the filler fiber from the resin matrix. Three-dimensional tomography provides an excellent method to observe crack interfaces of dental composites subjected to different types of mechanical and environmental conditions. (c) 2005 Wiley Periodicals, Inc. C1 Univ Illinois, Dept Restorat Dent, Chicago, IL 60612 USA. Univ Illinois, Dept Bioengn, Chicago, IL 60612 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Illinois, Dept Comp Sci, Chicago, IL 60612 USA. RP Drummond, JL (reprint author), Univ Illinois, Dept Restorat Dent, Chicago, IL 60612 USA. EM drummond@uic.edu FU NIDCR NIH HHS [DE07979] NR 11 TC 11 Z9 12 U1 2 U2 3 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 1552-4973 J9 J BIOMED MATER RES B JI J. Biomed. Mater. Res. Part B PD AUG PY 2005 VL 74B IS 2 BP 669 EP 675 DI 10.1002/jbm.b.30298 PG 7 WC Engineering, Biomedical; Materials Science, Biomaterials SC Engineering; Materials Science GA 951AK UT WOS:000230900900002 PM 15981175 ER PT J AU Polyak, VJ Provencio, PP AF Polyak, VJ Provencio, PP TI Comet cones: A variety of cave cone from Fort Stanton Cave, New Mexico SO JOURNAL OF CAVE AND KARST STUDIES LA English DT Article AB The name "comet cones" is suggested for a variety of cave cone, after their physical likeness with the images of comets. The comet cones of Fort Stanton Cave are constructed of millimeter-sized calcite cave rafts. A pre-existing stream environment is responsible for the small size of the rafts as well as the development of a "comet" tail on the cones. Drips from condensate water sank the rafts and formed the cones. C1 Univ New Mexico, Albuquerque, NM 87131 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Polyak, VJ (reprint author), Univ New Mexico, Albuquerque, NM 87131 USA. EM polyak@unm.edu NR 1 TC 1 Z9 1 U1 0 U2 4 PU NATL SPELEOLOGICAL SOC PI HUNTSVILLE PA 2813 CAVE AVE, HUNTSVILLE, AL 35810-4431 USA SN 1090-6924 J9 J CAVE KARST STUD JI J. Cave Karst Stud. PD AUG PY 2005 VL 67 IS 2 BP 125 EP 126 PG 2 WC Geosciences, Multidisciplinary SC Geology GA 964EI UT WOS:000231861100006 ER PT J AU Liu, N Lim, CS AF Liu, N Lim, CS TI Differential roles of XRCC2 in homologous recombinational repair of stalled replication forks SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Article DE XRCC2; RAD51; RAD51 paralogs; homologous recombinational repair; stalled replication forks; replication inhibitor ID STRAND BREAK REPAIR; DEOXYRIBONUCLEOSIDE TRIPHOSPHATE POOLS; MAMMALIAN-CELLS; NUCLEAR FOCI; RAD51 RECOMBINASE; DNA-REPLICATION; PROTEIN-A; EXPRESSION; DAMAGE; CYCLE AB Homologous recombination is an important mechanism in DNA replication to ensure faithful DNA synthesis and genomic stability. In this study, we investigated the role of XRCC2, a member of the RAD51 paralog family, in cellular recovery from replication arrest via homologous recombination. The protein expression of XRCC2, as well as its binding partner RAD51 D, is dramatically increased in S- and G(2)-phases, suggesting that these proteins function during and after DNA synthesis. XRCC2 mutant irs1 cells exhibit hypersensitivity to hydroxyurea (HU) and are defective in the induction of RAD51 foci after HU treatment. in addition, the HU-induced chromatin association of RAD51 is deficient in irs1 mutant. Interestingly, irs1 cells are only slightly sensitive to thymidine and able to form intact RAD51 foci in S-phase cells arrested with thymidine. Irs1 cells showed increased level of chromatin-bound RAD51 as well as the wild type cells after thymidine treatment. Both HU and thymidine induce gamma-H2AX foci in arrested S-phase nuclei. These results suggest that XRCC2 is involved in repair of HU-induced damage, but not thymidine-induced damage, at the stalled replication forks. Our data suggest that there are at least two sub-pathways in homologous recombination, XRCC2-dependent and -independent, for repair of stalled replication forks and assembly of RAD51 foci following replication arrest in S-phase., C1 Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Livermore, CA 94551 USA. RP Liu, N (reprint author), Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, POB 5508, Livermore, CA 94551 USA. EM liu3@llnl.gov FU NCI NIH HHS [CA84407-01A1] NR 39 TC 17 Z9 17 U1 1 U2 2 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD AUG 1 PY 2005 VL 95 IS 5 BP 942 EP 954 DI 10.1002/jcb.20457 PG 13 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 951VV UT WOS:000230960900007 PM 15861395 ER PT J AU Du, CW Koretsky, AP Izrailtyan, I Benveniste, H AF Du, CW Koretsky, AP Izrailtyan, I Benveniste, H TI Simultaneous detection of blood volume, oxygenation, and intracellular calcium changes during cerebral ischemia and reperfusion in vivo using diffuse reflectance and fluorescence SO JOURNAL OF CEREBRAL BLOOD FLOW AND METABOLISM LA English DT Article DE blood volume; calcium; calcium indicator of Rhod2; cerebral hemoglobin oxygenation; cerebral ischemia; hemodynamics; intracellular calcium ID PERFUSED MOUSE HEART; CYTOSOLIC CALCIUM; SENSORY STIMULATION; BRAIN ACTIVITY; RABBIT HEART; CA2+; RAT; MITOCHONDRIA; CORTEX; HYPOXIA AB We describe an approach to measure changes in intracellular calcium along with changes in blood volume and oxygenation directly from the exposed rat cortex in vivo during cerebral ischemia and reperfusion. Measurements were made using a catheter-based optical system. The endface of a Y-shaped bifurcated fiber optic bundle was mounted on the cortical surface. It delivered the light at three wavelengths of 548, 555, and 572 nm to the brain through a fast monochromator coupled to a xenon lamp, and collected the calcium-dependent fluorescence emission from Rhod2 at 589 nm (excited at 548 nm) along with the diffuse reflections at the wavelengths of 555 and 572 nm to determine the changes in blood volume and hemoglobin oxygenation. The feasibility of this approach was experimentally examined by inducing transient cerebral ischemia and reperfusion in the rat. The ischemia induced an 8.5%+/- 1.7% fluorescence increase compared with the preischemic control values. Blood volume and tissue hemoglobin oxygenation decreased by 57.4%+/- 12.6% and 47.3%+/- 12.5%, respectively. All signals normalized on reperfusion. The ischemia-induced change in Rhod2-Ca2+ fluorescence was blocked using a calcium channel blocker, nimodipine, confirming that intracellular changes in calcium were responsible for the fluorescence changes. Thus, changes in cerebral hemodynamics and intracellular calcium concentration changes were measured simultaneously, facilitating future studies of the interrelationship between neuronal activation and metabolic and vascular processes in normal and diseased brain. C1 Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. NINDS, Lab Funct & Mol Imaging, NIH, Bethesda, MD 20892 USA. SUNY Stony Brook, Dept Anesthesiol, Stony Brook, NY 11794 USA. RP Du, CW (reprint author), Brookhaven Natl Lab, Dept Med, Bldg 490,POB 5000, Upton, NY 11973 USA. EM congwu@bnl.gov RI Koretsky, Alan/C-7940-2015; Izrailtyan, Igor/G-8192-2016 OI Koretsky, Alan/0000-0002-8085-4756; Izrailtyan, Igor/0000-0003-1216-3467 FU Intramural NIH HHS [Z01 NS002989-08] NR 54 TC 22 Z9 23 U1 0 U2 6 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0271-678X J9 J CEREBR BLOOD F MET JI J. Cereb. Blood Flow Metab. PD AUG PY 2005 VL 25 IS 8 BP 1078 EP 1092 DI 10.1038/sj.jcbfm.9600102 PG 15 WC Endocrinology & Metabolism; Hematology; Neurosciences SC Endocrinology & Metabolism; Hematology; Neurosciences & Neurology GA 950SL UT WOS:000230877600015 PM 15744244 ER PT J AU Baranyai, A Bartok, A Chialvo, AA AF Baranyai, A Bartok, A Chialvo, AA TI Computer simulation of the 13 crystalline phases of ice SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID MOLECULAR-DYNAMICS SIMULATION; NEUTRON POWDER DIFFRACTION; POINT-CHARGE MODEL; HEXAGONAL ICE; LIQUID WATER; LOW-TEMPERATURE; HIGH-PRESSURES; FREE-ENERGY; EWALD SUM; VIII AB As a reference for follow-up studies toward more accurate model parametrizations, we performed molecular-dynamics and Monte Carlo simulations for all known crystalline phases of ice, as described by the simple point-charge/extended and TIP4P water models. We started from the measured structures, densities, and temperatures, and carried out classical canonical simulations for all these arrangements. All simulated samples were cooled down close to 0 K to facilitate the comparison with theoretical estimates. We determined configurational internal energies as well as pressures, and monitored how accurately the measured configurations were preserved during the simulations. While these two models predicted very similar thermophysical and structural properties for water at ambient conditions, the predicted features for the corresponding ice polymorphs may differ significantly. (C) 2005 American Institute of Physics. C1 Eotvos Lorand Univ, Dept Theoret Chem, H-1518 Budapest, Hungary. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Baranyai, A (reprint author), Eotvos Lorand Univ, Dept Theoret Chem, POB 32, H-1518 Budapest, Hungary. EM bajtony@para.chem.elte.hu OI Chialvo, Ariel/0000-0002-6091-4563 NR 69 TC 26 Z9 27 U1 1 U2 11 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 1 PY 2005 VL 123 IS 5 AR 054502 DI 10.1063/1.1989313 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 954QD UT WOS:000231168700048 PM 16108664 ER PT J AU Denis, PA Balasubramanian, K AF Denis, PA Balasubramanian, K TI Theoretical characterization of the low-lying electronic states of NbC SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID POTENTIAL-ENERGY CURVES; RELATIVISTIC EFFECTIVE POTENTIALS; SPIN-ORBIT OPERATORS; SPECTROSCOPIC CONSTANTS; TRANSITION-METAL; CI CALCULATIONS; RUC MOLECULE; CARBIDE; NIOBIUM; SPECTRUM AB We have studied the potential-energy curves and the spectroscopic constants of the ground and low-lying excited states of NbC by employing the complete active space self-consistent field method with relativistic effective core potentials followed by multireference configuration-interaction calculations. We have identified 23 low-lying electronic states of NbC with different spin multiplicities and spatial symmetries within 40 000 cm(-1). At the multireference single and double configuration interaction level of theory the (2)Sigma(+) and (2)Delta states are nearly degenerated, with the (2)Delta state located 187 cm(-1) lower than the (2)Sigma(+) state. The estimated spin-orbit splitting for the (2)Delta state results in a (2)Delta(3/2) ground state and A (2)Sigma(+) which is placed 650 cm(-1) above the ground state, in reasonable agreement with the experimental result, 831 cm(-1). Our computed spectroscopic constants are in good agreement with experimental values although our results differ from those of a previous density-functional investigation of the excited sates of NbC, mainly due to the strong multiconfigurational character of NbC. In the present work we have not only suggested assignments for the observed states but also computed more electronic states that are yet to be observed experimentally. (C) 2005 American Institute of Physics. C1 Univ Calif Davis, Inst Data Anal & Visualizat, Davis, CA 95616 USA. Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Glenn T Seaborg Ctr, Berkeley, CA 94720 USA. RP Balasubramanian, K (reprint author), Univ Calif Davis, Inst Data Anal & Visualizat, Davis, CA 95616 USA. EM kbala@ucdavis.edu OI Denis, Pablo/0000-0003-3739-5061 NR 38 TC 10 Z9 10 U1 0 U2 8 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 1 PY 2005 VL 123 IS 5 AR 054318 DI 10.1063/1.1978867 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 954QD UT WOS:000231168700034 PM 16108650 ER PT J AU Derrickson, SW Bittner, ER Kendrick, BK AF Derrickson, SW Bittner, ER Kendrick, BK TI Quantum hydrodynamics: Capturing a reactive scattering resonance SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID TIME-DEPENDENT FORMULATION; WAVE-PACKET DYNAMICS; WAVEPACKET DYNAMICS; MATRIX; TRAJECTORIES; EQUATIONS; MOTION; GRIDS; EQUIDISTRIBUTION AB The hydrodynamic equations of motion associated with the de Broglie-Bohm formulation of quantum mechanics are solved using a meshless method based upon a moving least-squares approach. An arbitrary Lagrangian-Eulerian frame of reference and a regridding algorithm which adds and deletes computational points are used to maintain a uniform and nearly constant interparticle spacing. The methodology also uses averaged fields to maintain unitary time evolution. The numerical instabilities associated with the formation of nodes in the reflected portion of the wave packet are avoided by adding artificial viscosity to the equations of motion. A new and more robust artificial viscosity algorithm is presented which gives accurate scattering results and is capable of capturing quantum resonances. The methodology is applied to a one-dimensional model chemical reaction that is known to exhibit a quantum resonance. The correlation function approach is used to compute the reactive scattering matrix, reaction probability, and time delay as a function of energy. Excellent agreement is obtained between the scattering results based upon the quantum hydrodynamic approach and those based upon standard quantum mechanics. This is the first clear demonstration of the ability of moving grid approaches to accurately and robustly reproduce resonance structures in a scattering system. (C) 2005 American Institute of Physics. C1 Univ Houston, Dept Chem, Houston, TX 77204 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Derrickson, SW (reprint author), Univ Houston, Dept Chem, Univ Pk, Houston, TX 77204 USA. EM sderrick101@aol.com RI Bittner, Eric/F-7141-2011 NR 29 TC 14 Z9 15 U1 0 U2 5 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 1 PY 2005 VL 123 IS 5 AR 054107 DI 10.1063/1.1994854 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 954QD UT WOS:000231168700015 PM 16108631 ER PT J AU Petrik, NG Kimmel, GA AF Petrik, NG Kimmel, GA TI Electron-stimulated sputtering of thin amorphous solid water films on Pt(111) SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID NANOSCALE ICE FILMS; D2O ICE; MOLECULAR-HYDROGEN; ION-BOMBARDMENT; LIGHT-IONS; H2O FILMS; EROSION; TEMPERATURE; DESORPTION; ATTACHMENT AB The electron-stimulated sputtering of thin amorphous solid water films deposited on Pt(111) is investigated. The sputtering appears to be dominated by two processes: (1) electron-stimulated desorption of water molecules and (2) electron-stimulated reactions leading to the production of molecular hydrogen and molecular oxygen. The electron-stimulated desorption of water increases monotonically with increasing film thickness. In contrast, the total sputtering-which includes all electron-stimulated reaction channels-is maximized for films of intermediate thickness. The sputtering yield versus thickness indicates that erosion of the film occurs due to reactions at both the water/vacuum interface and the Pt/water interface. Experiments with layered films of D2O and H2O demonstrate significant loss of hydrogen due to reactions at the Pt/water interface. The electron-stimulated sputtering is independent of temperature below similar to 80 K and increases rapidly at higher temperatures. (C) 2005 American Institute of Physics. C1 Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA. RP Kimmel, GA (reprint author), Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA. EM gregory.kimmel@pnl.gov RI Petrik, Nikolay/G-3267-2015; OI Petrik, Nikolay/0000-0001-7129-0752; Kimmel, Greg/0000-0003-4447-2440 NR 37 TC 25 Z9 25 U1 1 U2 9 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 1 PY 2005 VL 123 IS 5 AR 054702 DI 10.1063/1.1943388 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 954QD UT WOS:000231168700064 PM 16108680 ER PT J AU Prall, BS Parkinson, DY Fleming, GR AF Prall, BS Parkinson, DY Fleming, GR TI Probing correlated spectral motion: Two-color photon echo study of Nile blue SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID POLAR SOLVATION DYNAMICS; SHORT-TIME DYNAMICS; DOMAIN RESONANT SPECTROSCOPIES; INTRAMOLECULAR VIBRATIONS; ELECTRONIC SPECTROSCOPY; POLYATOMIC SOLUTES; NONPOLAR SOLVATION; LINEAR-RESPONSE; 3RD-ORDER; METHANOL AB We performed two-color three-pulse photon echo peak shift experiments on Nile blue in ethylene glycol and acetonitrile to determine the role of solvent dynamics in correlated spectral motion. The system was pumped near the absorption maximum and the correlation between the initial state and the final state was probed at a number of wavelengths, from the absorption maximum to the fluorescence maximum. In addition to solvent dynamics, we found that strongly coupled intramolecular vibrations generated correlations between different spectral regions. The inertial solvent response was found for both solvents to have a time scale on the order of 100-145 fs. This response contributed half of the solvent interaction strength for acetonitrile, but less than a third for ethylene glycol. Several diffusive time scales were observed: 500 fs and 2.5 ps for acetonitrile, and 1, 15, and 100 ps for ethylene glycol. A single description of the solvation dynamics was insufficient to quantitatively describe the dynamics at all probe wavelengths, which could indicate different dynamics in the ground and excited states or the presence of an additional contribution to the signal from the excited-state absorption. (C) 2005 American Institute of Physics. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA. RP Prall, BS (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM grfleming@lbl.gov RI Parkinson, Dilworth/A-2974-2015 OI Parkinson, Dilworth/0000-0002-1817-0716 NR 42 TC 16 Z9 16 U1 1 U2 9 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 1 PY 2005 VL 123 IS 5 AR 054515 DI 10.1063/1.1940637 PG 13 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 954QD UT WOS:000231168700061 PM 16108677 ER PT J AU Taboada-Serrano, P Yiacoumi, S Tsouris, C AF Taboada-Serrano, P Yiacoumi, S Tsouris, C TI Behavior of mixtures of symmetric and asymmetric electrolytes near discretely charged planar surfaces: A Monte Carlo study SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ELECTRICAL DOUBLE-LAYER; PRIMITIVE MODEL ELECTROLYTES; GOUY-CHAPMAN THEORY; POISSON-BOLTZMANN; ION DISTRIBUTIONS; SIMULATIONS; DEPENDENCE; CRYSTALS; EQUATION; SIZE AB Canonical Monte Carlo (CMC) simulations are employed in this work in order to study the structure of the electrical double layer (EDL) near discretely charged planar surfaces in the presence of symmetric and asymmetric indifferent electrolytes within the framework of a primitive model. The effects of discreteness and strength of surface charge, charge asymmetry, and size asymmetry are specific focuses of this work. The CMC simulation protocol is initially tested against the classical theory, the modified Gouy-Chapman (GC) theory, in order to assess the reliability of the simulation results. The CMC simulation results and the predictions of the classical theory show good agreement for 1:1 electrolytes and low surface charge, at which conditions the GC theory is valid. Simulations with symmetric and asymmetric electrolytes and mixtures of the two demonstrate that size plays an important role in determining the species present in the EDL and how the surface charge is screened. A size-exclusion effect could be consistently detected. Although it is energetically favorable that higher-valence ions screen the surface charge, their larger size prevents them from getting close to the surface. Smaller ions with lower valences perform the screening of the charge, resulting in higher local concentrations of small ions close to the surface. The simulations also showed that the strength of the surface charge enhances the size-exclusion effect. This effect will definitely affect the magnitude of the forces between interacting charged surfaces. (C) 2005 American Institute of Physics. C1 Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Taboada-Serrano, P (reprint author), Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA. EM sotira.yiacoumi@ce.gatech.edu RI Taboada-Serrano, Patrica/F-4745-2012; Tsouris, Costas/C-2544-2016 OI Tsouris, Costas/0000-0002-0522-1027 NR 34 TC 27 Z9 27 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 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 1 PY 2005 VL 123 IS 5 AR 054703 DI 10.1063/1.1992484 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 954QD UT WOS:000231168700065 PM 16108681 ER PT J AU Wang, XB Woo, HK Wang, LS AF Wang, XB Woo, HK Wang, LS TI Vibrational cooling in a cold ion trap: Vibrationally resolved photoelectron spectroscopy of cold C-60(-) anions SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID MASS-SPECTROMETER; SUPERCONDUCTIVITY; PHOTODETACHMENT; TEMPERATURE; SPECTRA; CLUSTER; BUCKMINSTERFULLERENE; PERFORMANCE; FULLERENES; MOLECULES AB We demonstrate vibrational cooling of anions via collisions with a background gas in an ion trap attached to a cryogenically controlled cold head (10-400 K). Photoelectron spectra of vibrationally cold C-60(-) anions, produced by electrospray ionization and cooled in the cold ion trap, have been obtained. Relative to spectra taken at room temperature, vibrational hot bands are completely eliminated, yielding well-resolved vibrational structures and a more accurate electron affinity for neutral C-60. The electron affinity of C-60 is measured to be 2.683 +/- 0.008 eV. The cold spectra reveal complicated vibrational structures for the transition to the C-60 ground state due to the Jahn-Teller effect in the ground state of C-60(-). Vibrational excitations in the two A(g) modes and eight H-g modes are observed, providing ideal data to assess the vibronic couplings in C-60(-) (C) 2005 American Institute of Physics. C1 Washington State Univ, Dept Phys, Richland, WA 99352 USA. Pacific NW Natl Lab, William R Wiley Environm Mol Sci Lab, Richland, WA 99352 USA. Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA. RP Wang, LS (reprint author), Washington State Univ, Dept Phys, 2710 Univ Dr, Richland, WA 99352 USA. EM ls.wang@pnl.gov NR 38 TC 92 Z9 92 U1 0 U2 19 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 1 PY 2005 VL 123 IS 5 AR 051106 DI 10.1063/1.1998787 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 954QD UT WOS:000231168700006 PM 16108622 ER PT J AU Baker, FS Daley, RA Bradley, RH AF Baker, FS Daley, RA Bradley, RH TI Surface chemistry of wood-based phosphoric acid-activated carbons and its effects on adsorptivity SO JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY LA English DT Article DE active carbons; phosphoric acid activation; surface chemistry; X-ray photoelectron spectroscopy (XPS) ID PORE-SIZE DISTRIBUTION; XPS-BASED MODEL; WATER; IMMERSION; SITES; POLAR AB The surface oxygen content of selected wood-based phosphoric acid-activated carbons was quantified using X-ray photoelectron spectroscopy (XPS) and correlated with the residual bulk phosphate levels of the carbons and their adsorptivity in solution. The adsorption of Al3+, Cu2+, and parachlorophenol, respectively, from water decreased as a function of increasing surface oxygen content of the carbons. When the carbon of lowest surface oxygen content was oxidized with ozone to impart a surface oxygen content comparable to that of a carbon with a much higher phosphate level, adsorption of Al3+, Cu2+, and para-chlorophenol from water decreased proportionally. The increase in polarity of the carbon surface was accompanied by a decrease in pH and appeared to be the dominant factor with respect to the adsorption of the target species from water. (c) 2005 Society of Chemical Industry. C1 Robert Gordon Univ, Sch Engn, Adv Mat & Biomat Res Ctr, Aberdeen AB10 1FR, Scotland. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Bradley, RH (reprint author), Robert Gordon Univ, Sch Engn, Adv Mat & Biomat Res Ctr, Aberdeen AB10 1FR, Scotland. EM r.bradley@rgu.ac.uk NR 27 TC 7 Z9 7 U1 1 U2 13 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0268-2575 J9 J CHEM TECHNOL BIOT JI J. Chem. Technol. Biotechnol. PD AUG PY 2005 VL 80 IS 8 BP 878 EP 883 DI 10.1002/jctb.1255 PG 6 WC Biotechnology & Applied Microbiology; Chemistry, Multidisciplinary; Engineering, Environmental; Engineering, Chemical SC Biotechnology & Applied Microbiology; Chemistry; Engineering GA 948FQ UT WOS:000230701800004 ER PT J AU Bitz, CM Holland, MM Hunke, EC Moritz, RE AF Bitz, CM Holland, MM Hunke, EC Moritz, RE TI Maintenance of the sea-ice edge SO JOURNAL OF CLIMATE LA English DT Article ID OCEAN CIRCULATION MODELS; CLIMATE SYSTEM MODEL; WINTER MIXED LAYER; WEDDELL-SEA; THERMOHALINE CIRCULATION; THICKNESS DISTRIBUTION; NUMERICAL-SIMULATION; GREENLAND SEA; HEAT-FLUX; VARIABILITY AB A coupled global climate model is used to evaluate processes that determine the equilibrium location of the sea-ice edge and its climatological annual cycle. The extent to which the wintertime ice edge departs from a symmetric ring around either pole depends primarily on coastlines, ice motion, and the melt rate at the ice-ocean interface. At any location the principal drivers of the oceanic heat flux that melts sea ice are absorbed solar radiation and the convergence of heat transported by ocean currents. The distance between the ice edge and the pole and the magnitude of the ocean heat flux convergence at the ice edge are inversely related. The chief exception to this rule is in the East Greenland Current, where the ocean heat flux convergence just east of the ice edge is relatively high but ice survives due to its swift southward motion and the protection of the cold southward-flowing surface water. In regions where the ice edge extends relatively far equatorward, absorbed solar radiation is the largest component of the ocean energy budget, and the large seasonal range of insolation causes the ice edge to traverse a large distance. In contrast, at relatively high latitudes, the ocean heat flux convergence is the largest component and it has a relatively small annual range, so the ice edge traverses a much smaller distance there. When the model is subject to increased CO2 forcing up to twice preindustrial levels, the ocean heat flux convergence weakens near the ice edge in most places. This weakening reduces the heat flux from the ocean to the base of the ice and tends to offset the effects of increased radiative forcing at the ice surface, so the ice edge retreats less than it would otherwise. C1 Univ Washington, Polar Sci Ctr, Seattle, WA 98105 USA. Natl Ctr Atmospher Res, Boulder, CO 80307 USA. Los Alamos Natl Lab, Los Alamos, NM USA. Univ Washington, Polar Sci Ctr, Seattle, WA 98195 USA. RP Bitz, CM (reprint author), Univ Washington, Polar Sci Ctr, 1013 NE 40th St, Seattle, WA 98105 USA. EM bitz@apl.washington.edu RI Bitz, Cecilia/S-8423-2016 OI Bitz, Cecilia/0000-0002-9477-7499 NR 57 TC 61 Z9 62 U1 1 U2 13 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0894-8755 J9 J CLIMATE JI J. Clim. PD AUG 1 PY 2005 VL 18 IS 15 BP 2903 EP 2921 DI 10.1175/JCLI3428.1 PG 19 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 962NA UT WOS:000231738300007 ER PT J AU Liu, P Wang, B Sperber, KR Li, T Meehl, GA AF Liu, P Wang, B Sperber, KR Li, T Meehl, GA TI MJO in the NCAR CAM2 with the Tiedtke convective scheme SO JOURNAL OF CLIMATE LA English DT Article ID MADDEN-JULIAN OSCILLATION; GENERAL-CIRCULATION MODEL; TROPICAL INTRASEASONAL OSCILLATION; RELAXED ARAKAWA-SCHUBERT; SEA-SURFACE TEMPERATURE; SUPER CLOUD CLUSTERS; COMPOSITE LIFE-CYCLE; CUMULUS CONVECTION; MOISTURE CONVERGENCE; PART II AB The boreal winter Madden-Julian oscillation (MJO) remains very weak and irregular in the National Center for Atmospheric Research (NCAR) Community Atmosphere Model version 2 (CAM2) as in its direct predecessor, the Community Climate Model version 3 (CCM3). The standard version of CAM2 uses the deep convective scheme of Zhang and McFarlane, as in CCM3, with the closure dependent on convective available potential energy (CAPE). Here, sensitivity tests using several versions of the Tiedtke convective scheme are conducted. Typically, the Tiedtke convection scheme gives an improved mean state, intraseasonal variability, space-time power spectra, and eastward propagation compared to the standard version of the model. Coherent eastward propagation of MJO-related precipitation is also much improved, particularly over the Indian-western Pacific Oceans. A composite life cycle of the model MJO indicates that over the Indian Ocean wind-induced surface heat exchange (WISHE) functions, while over the western/central Pacific Ocean aspects of frictional moisture convergence are evident in the maintenance and eastward propagation of the oscillation. C1 Univ Hawaii Manoa, Int Pacific Res Ctr, SOEST, Honolulu, HI 96822 USA. Lawrence Livermore Natl Lab, Program Climate Model Diagnosis & Intercomparison, Livermore, CA USA. Natl Ctr Atmospher Res, Boulder, CO 80307 USA. RP Liu, P (reprint author), Univ Hawaii Manoa, Int Pacific Res Ctr, SOEST, POST 409J,1680 E W Rd, Honolulu, HI 96822 USA. EM pliu@hawaii.edu RI Sperber, Kenneth/H-2333-2012 NR 56 TC 44 Z9 48 U1 0 U2 4 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0894-8755 J9 J CLIMATE JI J. Clim. PD AUG 1 PY 2005 VL 18 IS 15 BP 3007 EP 3020 DI 10.1175/JCLI3458.1 PG 14 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 962NA UT WOS:000231738300013 ER PT J AU Fisher, DJ Schluter, L Toleti, PK AF Fisher, DJ Schluter, L Toleti, PK TI Project management education and training process for career development SO JOURNAL OF CONSTRUCTION ENGINEERING AND MANAGEMENT-ASCE LA English DT Article AB The overall goal of this research project was to improve an organization's core competency in construction project management in a focused and systematic manner, with the help of a formalized education and training model. This paper describes the development of such a model for education and training standards for career development at Sandia National Laboratories (SNL) in Albuquerque, New Mexico. The need for this model was driven by the tremendous increase in the volume of construction work at SNL (post 9/11) along with several other factors [i.e., self-governance, customer feedback, and a new Department of Energy Order (413.3) for the handling of program and project management capital assets acquisition]. The goal of this research was to create a defined procedure to identify and quantify project management gaps and strengths, and then to develop a process to succinctly characterize each Sandia model participant's background qualification. This was achieved by administering a survey followed by a questionnaire whose results led to a customized training and development path, tracked both by individual and by department. Tools to address gaps were then identified and a role-task-competency hierarchy was created called the Sandia Project Management Career Development Academy model. C1 Univ New Mexico, Dept Civil Engn, Albuquerque, NM 87131 USA. Sandia Natl Labs, Corp Projects Dept 10824, Albuquerque, NM USA. RP Fisher, DJ (reprint author), Univ New Mexico, Dept Civil Engn, MSC01 1070, Albuquerque, NM 87131 USA. NR 9 TC 2 Z9 2 U1 2 U2 4 PU ASCE-AMER SOC CIVIL ENGINEERS PI RESTON PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA SN 0733-9364 J9 J CONSTR ENG M ASCE JI J. Constr. Eng. Manage.-ASCE PD AUG PY 2005 VL 131 IS 8 BP 903 EP 910 DI 10.1061/(ASCE)0733-9364(2005)131:8(903) PG 8 WC Construction & Building Technology; Engineering, Industrial; Engineering, Civil SC Construction & Building Technology; Engineering GA 948HS UT WOS:000230707300005 ER PT J AU Neeper, DA Stauffer, P AF Neeper, DA Stauffer, P TI Unidirectional gas flow in soil porosity resulting from barometric pressure cycles SO JOURNAL OF CONTAMINANT HYDROLOGY LA English DT Article DE soil venting; atmospheric pressure; vadose zone; harmonic analysis; barometric pumping AB During numerical simulation of air flow in the vadose zone, it was noticed that a small sinusoidal pressure would cause a gradual one-way migration of the pore gas. This was found to be a physical phenomenon, not a numerical artifact of the finite element simulation. The one-way migration occurs because the atmospheric pressure, and hence the air density, is slightly greater when air is flowing into the ground than when air is flowing out of the ground. A simple analytic theory of the phenomenon is presented, together with analytic calculations using actual barometric pressure data. In soil of one Darcy permeability, the one-way migration is of the order of a few tenths of a meter per year for either plane flow from ground surface or for radial flow from an open borehole. The migration is sufficiently small that it will have no practical consequences in most circumstances; however, investigators who conduct detailed numerical modeling should recognize that this phenomenon is not a numerical artifact in an apparently linear system. (c) 2005 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. RP Neeper, DA (reprint author), Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. EM dneeper@earthlink.net OI Stauffer, Philip/0000-0002-6976-221X NR 8 TC 6 Z9 5 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-7722 J9 J CONTAM HYDROL JI J. Contam. Hydrol. PD AUG PY 2005 VL 78 IS 4 BP 281 EP 289 DI 10.1016/j.jconhyd.2005.06.001 PG 9 WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources SC Environmental Sciences & Ecology; Geology; Water Resources GA 955CD UT WOS:000231201500002 PM 16039012 ER PT J AU Liang, LY Moline, GR Kamolpornwijit, W West, OR AF Liang, LY Moline, GR Kamolpornwijit, W West, OR TI Influence of hydrogeochemical processes on zero-valent iron reactive barrier performance: A field investigation SO JOURNAL OF CONTAMINANT HYDROLOGY LA English DT Article DE heterogeneity development; long-term performance; mineral precipitation; permeable reactive barrier; preferential flow; zero-valent iron ID LONG-TERM PERFORMANCE; GRANULAR IRON; MINERAL PRECIPITATION; CORROSION PRODUCTS; PREFERENTIAL FLOW; GROUNDWATER; NITRATE; TRICHLOROETHYLENE; REDUCTION; TRANSPORT AB Geochemical and mineralogical changes were evaluated at a field Fe-0-PRB at the Oak Ridge Y-12 site concerning operation performance during the treatment of U in high NO3- groundwater. In the 5-year study period, the Fe-0 remained reactive as shown in pore-water monitoring data, where increases in pH and the removal of certain ionic species persisted. However, coring revealed varying degrees of cementation. After 3.8-year treatment, porosity reduction of up to 41.7% was obtained from mineralogical analysis on core samples collected at the upgradient gravel-Fe-0 interface. Elsewhere, Fe-0 filings were loose with some cementation. Fe-0 corrosion and pore volume reduction at this site are more severe due to the presence of NO3- at a high level. Tracer tests indicate that hydraulic performance deteriorated: the flow distribution was heterogeneous and under the influence of interfacial cementation a large portion of water was diverted around the Fe-0 and transported outside the PRB. Based on the equilibrium reductions of NO3- and SO42- by Fe-0 and mineral precipitation, geochemical modeling predicted a maximum of 49% porosity loss for 5 years of operation. Additionally, modeling showed a spatial distribution of mineral precipitate volumes, with the maximum advancing from the interface toward downgradient with time. This study suggests that water quality monitoring, coupled with hydraulic monitoring and geochemical modeling, can provide a low-cost method for assessing PRB performance. Published by Elsevier B.V. C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. RP Liang, LY (reprint author), Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. EM LiangL@ornl.gov RI Liang, Liyuan/O-7213-2014 OI Liang, Liyuan/0000-0003-1338-0324 NR 36 TC 27 Z9 27 U1 2 U2 12 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-7722 J9 J CONTAM HYDROL JI J. Contam. Hydrol. PD AUG PY 2005 VL 78 IS 4 BP 291 EP 312 DI 10.1016/j.jconhyd.2005.05.006 PG 22 WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources SC Environmental Sciences & Ecology; Geology; Water Resources GA 955CD UT WOS:000231201500003 PM 16051393 ER PT J AU Abazajian, K Kadota, K Stewart, ED AF Abazajian, K Kadota, K Stewart, ED TI Parametrizing the power spectrum: beyond the truncated Taylor expansion SO JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS LA English DT Article DE cosmological perturbation theory; inflation; power spectrum ID PROBE WMAP OBSERVATIONS AB The power spectrum is traditionally parametrized by a truncated Taylor series: ln P(kappa) = ln P-* + (n(*) - 1) ln(kappa/kappa(*)) + 1/2n'(*) ln2(kappa/kappa(*)). It is reasonable to truncate the Taylor series if |n'(*) ln(kappa/kappa(*))| << |n(*) - 1|, but it is not if |n'(*) ln(kappa/kappa(*))| greater than or similar to |n(*) - 1|. We argue that there is no good theoretical reason to prefer |n'(*)| << |n(*) - 1|, and show that current observations are consistent with |n'(*) ln(kappa/kappa(*))| similar to |n(*) - 1| even for |ln(kappa/kappa(*))| similar to 1. Thus, there are regions of parameter space, which are both theoretically and observationally relevant, for which the traditional truncated Taylor series parametrization is inconsistent, and hence it can lead to incorrect parameter estimations. Motivated by this, we propose a simple extension of the traditional parametrization, which uses no extra parameters, but that, unlike the traditional approach, covers well motivated inflationary spectra with |n'(*)| similar to |n(*) - 1|. Our parametrization therefore covers not only standard slow-roll inflation models but also a much wider class of inflation models. We use this parametrization to perform a likelihood analysis for the cosmological parameters. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA. Korea Adv Inst Sci & Technol, Dept Phys, Taejon 305701, South Korea. Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada. RP Los Alamos Natl Lab, Div Theoret, MS B285, Los Alamos, NM 87545 USA. RI Stewart, Ewan/C-1565-2011 NR 22 TC 8 Z9 8 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 1475-7516 J9 J COSMOL ASTROPART P JI J. Cosmol. Astropart. Phys. PD AUG PY 2005 IS 8 AR 008 DI 10.1088/1475-7516/2005/08/008 PG 11 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BM UT WOS:000231565200005 ER PT J AU Keyes, BM Gedvilas, LM Li, X Coutts, TJ AF Keyes, BM Gedvilas, LM Li, X Coutts, TJ TI Infrared spectroscopy of polycrystalline ZnO and ZnO : N thin films SO JOURNAL OF CRYSTAL GROWTH LA English DT Article DE characterization; impurities; FTIR-spectroscopy; metalorganic chemical vapor deposition; oxides; zinc compounds ID P-TYPE ZNO; ZINC-OXIDE; HYDROGEN AB Polycrystalline zinc oxide (ZnO) and nitrogen-doped zinc oxide (ZnO:N) films, about I pm thick, were grown by metalorganic chemical vapor deposition on crystalline silicon substrates. Infrared absorption measurements reveal a complex growth chemistry resulting in the presence of carbon, oxygen, and nitrogen-related functional groups not seen in single-crystal material. Noteworthy changes in the absorbance spectra that occur with the incorporation of nitrogen include a group of strongly absorbing bands around 1800cm(-1) and a band at 3020cm(-1) attributable to a N H bond. These atomic configurations, in addition to the observed O-H bands around 3400cm(-1), provide insight into the difficulties of creating p-type ZnO through the incorporation of nitrogen. (c) 2005 Elsevier B.V. All rights reserved. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Keyes, BM (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. EM brian_keyes@nrel.gov NR 24 TC 46 Z9 47 U1 1 U2 12 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD AUG 1 PY 2005 VL 281 IS 2-4 BP 297 EP 302 DI 10.1016/j.jcrysgro.2005.04.053 PG 6 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA 952NR UT WOS:000231011600013 ER PT J AU Lee, SW Fischer, PF Loth, F Royston, TJ Grogan, JK Bassiouny, HS AF Lee, SW Fischer, PF Loth, F Royston, TJ Grogan, JK Bassiouny, HS TI Flow-induced vein-wall vibration in an arteriovenous graft SO JOURNAL OF FLUIDS AND STRUCTURES LA English DT Article; Proceedings Paper CT 8th International Conference on Flow-Induced Vibrations (FIV 2004) CY JUL, 2004 CL Ecole Polytechn, Palaiseau, FRANCE HO Ecole Polytechn DE arteriovenous graft; vein vibration; direct numerical simulation; pulsatile flow; hemodynamics; blood vessel; transitional flow ID POSTSTENOTIC DILATATION; NUMERICAL-SIMULATION; VENOUS ANASTOMOSIS; COMPLIANT SURFACE; CAROTID ARTERIES; PULSATILE FLOW; STENOSIS; HEMODIALYSIS; TURBULENCE; DYNAMICS AB The hemodynamic environment of an arteriovenous (AV) graft differs from that of arterial grafts because mean flow rates are typically 10 times greater. This increased flow rate can create a weakly turbulent state, which alters the biomechanical environment greatly and may play a role in AV graft failure. A canine animal study was conducted to simulate the hemodynamic environment of a human AV graft. In vivo measurements were obtained for vein-wall vibration (VWV), graft geometry, and blood flow rate. In order to investigate the complex flow structure at the venous anastomosis of an AV graft, which is thought to induce these vibrations, a computational fluid dynamics study was conducted by direct numerical simulation under pulsatile flow and geometry conditions based on the animal study. The simulation technique employs the spectral element method, which is a high-order discretization ideally suited to the simulation of transitional flows in complex domains. The minimum and maximum Reynolds numbers entering the graft, based on average velocities, were 875 and 1235, respectively. While velocity and pressure fluctuations are clearly present in the numerical simulations, their magnitude and frequency do not correlate well with the in vivo VWV measurements. Potential reasons for this discrepancy are threefold. First, a quiescent inflow condition was used in the present computations; a more realistic inflow condition might alter the velocity fluctuations significantly. Second, simulations were conducted with a rigid geometry; compliance may play an important role in flow stability within an AV graft. Third, the flow split between the graft and vein inlet may also play an important role in the stability of the flow structures. (c) 2005 Elsevier Ltd. All rights reserved. C1 Univ Illinois, Dept Mech & Ind Engn, Chicago, IL 60607 USA. Univ Illinois, Dept Bioengn, Chicago, IL 60607 USA. Univ Chicago, Dept Surg, Chicago, IL 60637 USA. Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. RP Loth, F (reprint author), Univ Illinois, Dept Mech & Ind Engn, 842 W Taylor, Chicago, IL 60607 USA. EM slee92@uic.edu; fischer@mcs.anl.gov; floth@uic.edu; troyston@uic.edu; jgrogan@surgery.bsd.uchicago.edu; hbassiou@surgery.bsd.uchicago.edu RI Loth, Francis/C-1177-2008; Royston, Thomas/C-1285-2008; Lee, Sang-Wook/C-6666-2011 OI Lee, Sang-Wook/0000-0002-8600-9991 NR 41 TC 26 Z9 26 U1 2 U2 8 PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0889-9746 J9 J FLUID STRUCT JI J. Fluids Struct. PD AUG PY 2005 VL 20 IS 6 SI SI BP 837 EP 852 DI 10.1016/j.jfluidstructs.2005.04.006 PG 16 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA 960YF UT WOS:000231628400007 ER PT J AU O'Brien, JE Stoots, CM Herring, JS Lessing, PA Hartvigsen, JJ Elangovan, S AF O'Brien, J. E. Stoots, C. M. Herring, J. S. Lessing, P. A. Hartvigsen, J. J. Elangovan, S. TI Performance Measurements of Solid-Oxide Electrolysis Cells for Hydrogen Production SO JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY LA English DT Article DE solid oxide fuel cells; hydrogen economy; current density; solid electrolytes; stability; scandium; zirconium; steam AB An experimental study has been completed to assess the performance of single solid-oxide electrolysis cells operating over a temperature range of 800 to 900 degrees C. The experiments were performed over a range of steam inlet partial pressures (2.3-12.2 kPa), carrier gas flow rates (50-200 sccm), and current densities (-0.75-0.25 A/cm(2)) using single electrolyte-supported button cells of scandia-stabilized zirconia. Steam consumption rates associated with electrolysis were measured directly using inlet and outlet dew-point instrumentation. Cell operating potentials and cell current were varied using a programmable power supply and monitored continuously. Values of area-specific resistance and thermal efficiency are presented as a function of current density. Cell performance is shown to be continuous from the fuel-cell mode to the electrolysis mode of operation. The effects of steam starvation and thermal cycling on cell performance parameters are discussed. C1 [O'Brien, J. E.; Stoots, C. M.; Herring, J. S.; Lessing, P. A.] Idaho Natl Lab, Idaho Falls, ID 83415 USA. [Hartvigsen, J. J.; Elangovan, S.] Ceramatec Inc, Salt Lake City, UT 84119 USA. RP O'Brien, JE (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA. FU US Department of Energy FX This work was sponsored by the US Department of Energy, Office of Energy Efficiency and Renewable Energy. Ceramatec, Inc. is participating through a subcontract with INEEL. NR 8 TC 46 Z9 48 U1 3 U2 23 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 1550-624X J9 J FUEL CELL SCI TECH JI J. Fuel Cell Sci. Technol. PD AUG PY 2005 VL 2 IS 3 BP 156 EP 163 DI 10.1115/1.1895946 PG 8 GA V04OL UT WOS:000207067600002 ER PT J AU Bhattacharya, T Csaki, C Martin, MR Shirman, Y Terning, J AF Bhattacharya, T Csaki, C Martin, MR Shirman, Y Terning, J TI Warped domain wall fermions SO JOURNAL OF HIGH ENERGY PHYSICS LA English DT Article DE lattice gauge field theories; chiral lagrangians ID CHIRAL GAUGE-THEORIES; EXACTLY MASSLESS QUARKS; YANG-MILLS THEORY; FEYNMAN-INTEGRALS; STANDARD MODEL; LATTICE; SYMMETRY; UNITARITY; THEOREM; REGULARIZATION AB We consider Kaplan's domain wall fermions in the presence of an Anti-de Sitter (AdS) background in the extra dimension. Just as in the flat space case, in a completely vector-like gauge theory defined after discretizing this extra dimension, the spectrum contains a very light charged fermion whose chiral components are localized at the ends of the extra dimensional interval. The component on the IR boundary of the AdS space can be given a large mass by coupling it to a neutral fermion via the Higgs mechanism. In this theory, gauge invariance can be restored either by taking the limit of infinite proper length of the extra dimension or by reducing the AdS curvature radius towards zero. In the latter case, the Kaluza-Klein modes stay heavy and the resulting classical theory approaches a chiral gauge theory, as we verify numerically. Potential difficulties for this approach could arise from the coupling of the longitudinal mode of the light gauge boson, which has to be treated non-perturbatively. C1 Los Alamos Natl Lab, Div Theory, Los Alamos, NM 87545 USA. Cornell Univ, Newman Lab, Inst High Energy Phenomenol, Ithaca, NY 14853 USA. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. RP Los Alamos Natl Lab, Div Theory, POB 1663, Los Alamos, NM 87545 USA. EM tanmoy@lanl.gov; csaki@lepp.cornell.edu; mrmartin@lanl.gov; shirman@lanl.gov; terning@physics.ucdavis.edu RI Bhattacharya, Tanmoy/J-8956-2013; OI Bhattacharya, Tanmoy/0000-0002-1060-652X; Terning, John/0000-0003-1367-0575 NR 59 TC 7 Z9 7 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1029-8479 J9 J HIGH ENERGY PHYS JI J. High Energy Phys. PD AUG PY 2005 IS 8 AR 061 DI 10.1088/1126-6708/2005/08/061 PG 29 WC Physics, Particles & Fields SC Physics GA 963BV UT WOS:000231778700047 ER PT J AU Katz, E Nelson, AE Walker, DGE AF Katz, E Nelson, AE Walker, DGE TI The intermediate Higgs SO JOURNAL OF HIGH ENERGY PHYSICS LA English DT Article DE beyond standard model; Higgs physics; technicolor and composite models ID DYNAMICAL SYMMETRY-BREAKING; COMPOSITE HIGGS; ELECTROWEAK PARAMETERS; TECHNICOLOR THEORIES; HIERARCHY; MASSES; MODEL AB Two paradigms for the origin of electroweak superconductivity are a weakly coupled scalar condensate, and a strongly coupled fermion condensate. The former suffers from a finetuning problem unless there are cancelations to radiative corrections, while the latter presents potential discrepancies with precision electroweak physics. Here we present a framework for electroweak symmetry breaking which interpolates between these two paradigms, and mitigates their faults. As in Little Higgs theories, the Higgs is a pseudo-Nambu Goldstone boson, potentially composite. The cutoff sensitivity of the one loop top quark contribution to the effective potential is canceled by contributions from additional vector-like quarks, and the cutoff can naturally be higher than in the minimal Standard Model. Unlike the Little Higgs models, the cutoff sensitivity from one loop gauge contributions is not canceled. However, such gauge contributions are naturally small as long as the cutoff is below 6TeV. Precision electroweak corrections are suppressed relative to those of Technicolor or generic Little Higgs theories. In some versions of the intermediate scenario, the Higgs mass is computable in terms of the masses of these additional fermions and the Nambu-Goldstone Boson decay constant. In addition to the Higgs, new scalar and pseudoscalar particles are typically present at the weak scale. C1 Boston Univ, Dept Phys, Boston, MA 02215 USA. Stanford Linear Accelerator Ctr, Theory Grp, Menlo Pk, CA 94025 USA. Univ Washington, Dept Phys, Seattle, WA 98195 USA. Harvard Univ, Jefferson Lab Phys, Cambridge, MA 02138 USA. RP Katz, E (reprint author), Boston Univ, Dept Phys, Boston, MA 02215 USA. EM amikatz@slac.stanford.edu; anelson@phys.washington.edu; walker@lamb.physics.harvard.edu NR 63 TC 29 Z9 29 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1029-8479 J9 J HIGH ENERGY PHYS JI J. High Energy Phys. PD AUG PY 2005 IS 8 AR 074 PG 29 WC Physics, Particles & Fields SC Physics GA 963BV UT WOS:000231778700034 ER PT J AU McGreevy, J Silverstein, E AF McGreevy, J Silverstein, E TI The tachyon at the end of the universe SO JOURNAL OF HIGH ENERGY PHYSICS LA English DT Article DE superstrings and heterotic strings; tachyon condensation; Black Holes in String Theory; cosmology of theories beyond the SM ID STRING THEORY; QUANTUM-GRAVITY; FIELD-THEORY; 2 DIMENSIONS; MODELS AB We show that a tachyon condensate phase replaces the spacelike singularity in certain cosmological and black hole spacetimes in string theory. We analyze explicitly a set of examples with flat spatial slices in various dimensions which have a winding tachyon condensate, using worldsheet path integral methods from Liouville theory. In a vacuum with no excitations above the tachyon background in the would-be singular region, we analyze the production of closed strings in the resulting state in the bulk of spacetime. We find a thermal result reminiscent of the Hartle-Hawking state, with tunably small energy density. The amplitudes exhibit a self-consistent truncation of support to the weakly-coupled small-tachyon region of spacetime. We argue that the background is accordingly robust against back reaction, and that the resulting string theory amplitudes are perturbatively finite, indicating a resolution of the singularity and a mechanism to start or end time in string theory. Finally, we discuss the generalization of these methods to examples with positively curved spatial slices. C1 Stanford Univ, SLAC, Stanford, CA 94305 USA. Stanford Univ, Dept Phys, Stanford, CA 94305 USA. RP McGreevy, J (reprint author), Stanford Univ, SLAC, Stanford, CA 94305 USA. EM mcgreevy@stanford.edu; silverstein@stanford.edu NR 69 TC 56 Z9 56 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1029-8479 J9 J HIGH ENERGY PHYS JI J. High Energy Phys. PD AUG PY 2005 IS 8 AR 090 PG 30 WC Physics, Particles & Fields SC Physics GA 963BV UT WOS:000231778700018 ER PT J AU Doughty, C Tsang, CF AF Doughty, C Tsang, CF TI Signatures in flowing fluid electric conductivity logs SO JOURNAL OF HYDROLOGY LA English DT Article DE borehole logging; fluid electric conductivity logging; hydraulically conductive fractures; heterogeneous aquifers; hydrogeologic characterization; flow and transport modeling ID FRACTURE INFLOW PARAMETERS; LOGGING METHOD; BOREHOLE AB Flowing fluid electric conductivity logging provides a means to determine hydrologic properties of fractures, fracture zones, or other permeable layers intersecting a borehole in saturated rock. The method involves analyzing the time-evolution of fluid electric conductivity (FEC) logs obtained while the well is being pumped and yields information on the location, hydraulic transmissivity, and salinity of permeable layers. The original analysis method was restricted to the case in which flows from the permeable layers or fractures were directed into the borehole (inflow). Recently, the method was adapted to permit treatment of both inflow and outflow, including analysis of natural regional flow in the permeable layer. A numerical model simulates flow and transport in the wellbore during flowing FEC logging, and fracture properties are determined by optimizing the match between simulation results and observed FEC logs. This can be a laborious trial-and-error procedure, especially when both inflow and outflow points are present. Improved analyses methods are needed. One possible tactic would be to develop an automated inverse method, but this paper takes a more elementary approach and focuses on identifying the signatures that various inflow and outflow features create in flowing FEC logs. The physical insight obtained provides a basis for more efficient analysis of these logs, both for the present trial and error approach and for a potential future automated inverse approach. Inflow points produce distinctive signatures in the FEC logs themselves, enabling the determination of location, inflow rate, and ion concentration. Identifying outflow locations and flow rates typically requires a more complicated integral method, which is also presented in this paper. (C) 2005 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. RP Doughty, C (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, 1 Cyclotron Rd,MS 90-1116, Berkeley, CA 94720 USA. EM cadoughty@lbl.gov; cftsang@lbl.gov RI Doughty, Christine/G-2389-2015 NR 26 TC 18 Z9 18 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-1694 J9 J HYDROL JI J. Hydrol. PD AUG 1 PY 2005 VL 310 IS 1-4 BP 157 EP 180 DI 10.1016/j.jhydrol.2004.12.003 PG 24 WC Engineering, Civil; Geosciences, Multidisciplinary; Water Resources SC Engineering; Geology; Water Resources GA 944NQ UT WOS:000230436200010 ER PT J AU McInturff, JE Wang, SJ Machleidt, T Lin, TR Oren, A Hertz, CJ Krutzik, SR Hart, S Zeh, K Anderson, DH Gallo, RL Modlin, RL Kim, J AF McInturff, JE Wang, SJ Machleidt, T Lin, TR Oren, A Hertz, CJ Krutzik, SR Hart, S Zeh, K Anderson, DH Gallo, RL Modlin, RL Kim, J TI Granulysin-derived peptides demonstrate antimicrobial and anti-inflammatory effects against Propionibacterium acnes SO JOURNAL OF INVESTIGATIVE DERMATOLOGY LA English DT Article DE acne; antimicrobial peptide; inflammation; innate immunity; skin ID INFLAMMATORY ACNE; DEFENSINS; ACTIVATION; INDUCTION; RESPONSES; IMMUNITY; INNATE; CELLS; BETA AB Propionibacterium acnes is a key therapeutic target in acne, yet this bacterium has become resistant to standard antibiotic agents. We investigated whether the human antimicrobial protein granulysin is a potential candidate for the treatment of acne. Granulysin and synthetic granulysin-derived peptides possessing a helix-loop-helix motif killed P. acnes in vitro. Modi. cation of a helix-loop-helix peptide, 31-50, by substitution of a tryptophan for the valine at amino acid 44 (peptide 31-50v44w) to increase its interaction with bacterial surfaces also increased its antimicrobial activity. Moreover, when synthesized with D- rather than L-type amino acids, this peptide (D-31-50v44w) became less susceptible to degradation by proteases and more effective in killing P. acnes. Granulysin peptides were bactericidal, demonstrating an advantage over standard bacteriostatic antibiotics in their control of P. acnes. Moreover, peptide D-31-50v44w killed P. acnes in isolated human microcomedone preparations. Importantly, peptides 31-50, 31-50v44w, and D-31-50v44w also have potential anti-inflammatory effects, as demonstrated by suppression of P. acnes-stimulated cytokine release. Taken together, these data suggest that granulysin peptides may be useful as topical therapeutic agents, providing alternatives to current acne therapies. C1 Univ Calif Los Angeles, Inst Mol Biol, Inst Genom & Prote, Dept Dermatol,DOE, Los Angeles, CA 90095 USA. Univ Calif Los Angeles, David Geffen Sch Med, Dept Med, Div Dermatol, Los Angeles, CA USA. Ansata Therapeut Inc, La Jolla, CA USA. W Los Angeles Vet Adm Med Ctr, Dept Med, Div Pulm & Crit Care Med, Los Angeles, CA USA. Univ Calif Los Angeles, David Geffen Sch Med, Dept Med, Los Angeles, CA USA. Univ Calif Los Angeles, David Geffen Sch Med, Dept Microbiol, Los Angeles, CA USA. Howard Hughes Med Inst, Los Angeles, CA USA. Univ Calif San Diego, Div Dermatol, San Diego, CA 92103 USA. Vet Adm San Diego Healthcare Syst, San Diego, CA USA. RP Kim, J (reprint author), Univ Calif Los Angeles, Inst Mol Biol, Inst Genom & Prote, Dept Dermatol,DOE, 52-121 CHS,10833 Le Conte Ave, Los Angeles, CA 90095 USA. EM JeKim@mednet.ucla.edu RI Gallo, Richard/A-8931-2009; OI Modlin, Robert/0000-0003-4720-031X FU NIAMS NIH HHS [K08 AR048551, K08 AR48551-01] NR 26 TC 40 Z9 44 U1 0 U2 3 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DG, OXON, ENGLAND SN 0022-202X J9 J INVEST DERMATOL JI J. Invest. Dermatol. PD AUG PY 2005 VL 125 IS 2 BP 256 EP 263 DI 10.1111/j.0022-202X.2005.23805.x PG 8 WC Dermatology SC Dermatology GA 945HI UT WOS:000230493200012 PM 16098035 ER PT J AU Yang, N Dennis, KW McCallum, RW Kramer, MJ Zhang, Y Lee, PL AF Yang, N Dennis, KW McCallum, RW Kramer, MJ Zhang, Y Lee, PL TI Spontaneous magneto striction in R2Fe14B (R = Y, Nd, Gd, Tb, Er) SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article DE magnetostriction; rare-earth transition-metal compound; synchrotron; X-ray powder diffraction; Rietveld refinement ID THERMAL-EXPANSION ANOMALIES; ND2FE14B SINGLE-CRYSTALS; = RARE-EARTH; PERMANENT-MAGNETS; SPONTANEOUS MAGNETOSTRICTION; TEMPERATURE-DEPENDENCE; MOSSBAUER-SPECTROSCOPY; TERNARY COMPOUNDS; MOLECULAR-FIELD; FE AB Thermal expansion anomalies of R2Fe14B (R = Y, Nd, Gd, Tb, Er) stoichiometric compounds were studied by X-ray diffraction with high-energy synchrotron radiation using a Debye-Scherrer geometry in temperature range of similar to 10-1000 K. A large invar effect with a corresponding large temperature dependence of lattice parameters similar to 10-15 K above their Curie temperatures (T-c) are observed. The a-axes show a larger invar effect than the c-axes in all compounds. The spontaneous magnetostrain of the lattices and bonds are calculated. The iron sublattice is shown to dominate the volumetric spontaneous magnetostriction of the compounds and the contribution from the rare-earth sublattice is roughly proportional to the spin magnetic moment of the rare earths. The bond-length changes are consistent with the theoretical spin-density calculation. The average bonds magnetostrain around Fe sites is approximately proportional to their magnetic moments. (c) 200 Elsevier B.V. All rights reserved. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Iowa State Univ, Ames Lab, Ames, IA 50010 USA. Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50010 USA. RP Yang, N (reprint author), Argonne Natl Lab, Adv Photon Source, 438E002,9700 S Cass Ave, Argonne, IL 60439 USA. EM nyang@aps.anl.gov NR 40 TC 12 Z9 13 U1 2 U2 17 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD AUG PY 2005 VL 295 IS 1 BP 65 EP 76 DI 10.1016/j.jmmm.2004.12.040 PG 12 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA 947HT UT WOS:000230634700009 ER PT J AU Guo, XZ Ravi, BG Devi, PS Hanson, JC Margolies, J Gambino, RJ Parise, JB Sampath, S AF Guo, XZ Ravi, BG Devi, PS Hanson, JC Margolies, J Gambino, RJ Parise, JB Sampath, S TI Synthesis of yttrium iron garnet (YIG) by citrate-nitrate gel combustion and precursor plasma spray processes SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article DE YIG; citrate-nitrate; plasma spray; phase evolution; magnetic property ID ALUMINUM-GARNET; PARTICLES AB The influence of synthesis conditions on the formation of yttrium iron garnet (YIG) powders starting from the same precursor solution was investigated by employing a citrate-nitrate (C-N) gel combustion process and a precursor plasma spraying technique. Two different C-N ratios were used in the synthesis and their influences on phase formation were studied by thermal analysis (DTA/TGA) and X-ray powder diffraction (XRD). Time-resolved powder XRD experiments were performed for the first time on these C-N precursor materials to understand their mode of decomposition. For a C-N = 0.75, the ex-situ XRD data confirmed a single-step conversion to YIG from the amorphous precursor powder without any intermediate phase formation. However, the use of the same C-N precursor solution as a liquid feedstock material in the precursor plasma spraying (PPS) technique revealed an entirely different transformation mechanism to YIG through the intermediate phase YFeO3. The measured values of saturation magnetization (M-S) as well as coercive field (H-C) of the powder samples annealed at 1500 degrees C are close to those reported for bulk YIG. (C) 2005 Elsevier B.V. All rights reserved. C1 Cent Glass & Ceram Res Inst, Electroceram Div, Kolkata 700032, W Bengal, India. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. SUNY Stony Brook, Dept Geosci, Stony Brook, NY 11794 USA. SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. RP Ravi, BG (reprint author), SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA. EM bravi@notes.cc.sunysb.edu RI Hanson, jonathan/E-3517-2010; Devi, P. Sujatha/G-6970-2011 NR 24 TC 49 Z9 50 U1 3 U2 16 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 EI 1873-4766 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD AUG PY 2005 VL 295 IS 2 BP 145 EP 154 DI 10.1016/j.jmmm.2005.01.007 PG 10 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA 954NW UT WOS:000231162800008 ER PT J AU Narayan, RJ Abernathy, H Riester, L Berry, CJ Brigmon, R AF Narayan, RJ Abernathy, H Riester, L Berry, CJ Brigmon, R TI Antimicrobial properties of diamond-like carbon-silver-platinum nanocomposite thin films SO JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE LA English DT Article; Proceedings Paper CT International Symposium on Manufacturing, Properties and Applications CY OCT 18-20, 2004 CL Columbus, OH DE diamond-like carbon; pulsed-laser deposition; thin films ID PULSED-LASER DEPOSITION; AMORPHOUS-CARBON; MECHANICAL-PROPERTIES; COATINGS; BIOCOMPATIBILITY; INFECTIONS; ADHERENCE; SURFACE AB Silver and platinum were incorporated within diamond-like carbon (DLC) thin films using a multicomponent target pulsed laser deposition process. Transmission electron microscopy of the DLC-silver and DLC-platinum composite films reveals that these films self-assemble into particulate nanocomposite structures that possess a high fraction of sp(3)-hybridized carbon atoms. Nanoindentation testing of DLC-silver nanocomposite films demonstrates that these films possess hardness and Young's modulus values of approximately 35 and 350 GPa, respectively. DLC-silver-platinum films demonstrated exceptional antimicrobial properties against Staphylococcus and Pseudomonas aeruginosa bacteria. C1 Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Savannah River Natl Lab, Environm Biotechnol Sect, Aiken, SC 29808 USA. RP Narayan, RJ (reprint author), Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA. EM roger.narayan@mse.gatech.edu RI Narayan, Roger/J-2789-2013 OI Narayan, Roger/0000-0002-4876-9869 NR 34 TC 20 Z9 20 U1 0 U2 3 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1059-9495 EI 1544-1024 J9 J MATER ENG PERFORM JI J. Mater. Eng. Perform. PD AUG PY 2005 VL 14 IS 4 BP 435 EP 440 DI 10.1361/105994905X56197 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA 954VT UT WOS:000231184000005 ER PT J AU Zhu, YT AF Zhu, YT TI Deformation twinning in nanocrystalline metals SO JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE LA English DT Article; Proceedings Paper CT International Symposium on Manufacturing, Properties and Applications CY OCT 18-20, 2004 CL Columbus, OH DE deformation twinning; growth; models; nanomaterials; nucleation; stacking faults ID MOLECULAR-DYNAMICS SIMULATION; GRAIN-SIZE; ROOM-TEMPERATURE; FCC METALS; COPPER; AL; MECHANISM; ALUMINUM; STRAIN; DISLOCATIONS AB Deformation twins have been oberved in nanocrystalline Al processed by cryogenic ball-milling and in nanocrystalline Cu processed by high-pressure torsion at a very low strain rate. They were formed by partial dislocations emitted from grain boundaries. This paper first reviews experimental evidences and atomistic simulation results on deformation twinning and partial dislocation emissions from grain boundaries and then discusses recent analytical models on the nucleation and growth of deformation twins. These models are compared with experimental results to establish their validity and limitations. C1 Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA. RP Zhu, YT (reprint author), Los Alamos Natl Lab, Mat Sci & Technol Div, POB 1663, Los Alamos, NM 87545 USA. EM yzhu@lanl.gov RI Zhu, Yuntian/B-3021-2008 OI Zhu, Yuntian/0000-0002-5961-7422 NR 35 TC 7 Z9 7 U1 1 U2 10 PU ASM INTERNATIONAL PI MATERIALS PARK PA SUBSCRIPTIONS SPECIALIST CUSTOMER SERVICE, MATERIALS PARK, OH 44073-0002 USA SN 1059-9495 J9 J MATER ENG PERFORM JI J. Mater. Eng. Perform. PD AUG PY 2005 VL 14 IS 4 BP 467 EP 472 DI 10.1361/105994905X56269 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA 954VT UT WOS:000231184000009 ER PT J AU Feldmann, DM Larbalestier, DC Holesinger, T Feenstra, R Gapud, AA Specht, ED AF Feldmann, DM Larbalestier, DC Holesinger, T Feenstra, R Gapud, AA Specht, ED TI Evidence for extensive grain boundary meander and overgrowth of substrate grain boundaries in high critical current density ex situ YBa2Cu3O7-x coated conductors SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID YBCO FILMS; THIN-FILMS; SUPERCONDUCTORS; TRANSPORT; IBAD; PERFORMANCE; TRANSITION; DEPOSITION; TEMPLATES; GROWTH AB It has been generally accepted that YBa2Cu3O7-x (YBCO) films deposited on deformation textured polycrystalline metal tapes result in YBCO grain boundary (GB) networks that essentially replicate the GBs of the underlying substrate. Here we report that for thicker YBCO films produced by a BaF2 ex situ process, this is not true. Using electron backscatter diffraction combined with ion milling, we have been able to map the evolution of the YBCO grain structure and compare it to the underlying template in several coated conductors. For thin (<= 0.5 mu m) YBCO films deposited on rolling-assisted biaxially textured substrates (RABiTS), the YBCO GBs nearly directly overlap the substrate GBs. For 0.7-1.4 mu m YBCO films, the GBs were found to meander along the substrate GBs and along the sample normal, with displacements several times the film thickness. In very thick films (2.5-2.9 mu m), the YBCO grains can completely overgrow substrate grains and GBs, resulting in a substantial disconnection of the YBCO and substrate GB networks. Similar behavior is found for BaF2 ex situ YBCO films on ion-beam-assisted deposition-type templates. The ability of the YBCO to overgrow substrate grains and GBs is believed to be due to liquid-phase mediated laminar grain growth. Although the behavior of the YBCO GB networks changes with YBCO film thickness, the samples maintained high critical current density (J(c)) values of >2 MA/cm(2) for films up to 1.4 mu m thick, and up to 0.9 MA/cm(2) for 2.5-2.9-mu m-thick films. C1 Univ Wisconsin, Appl Supercond Ctr, Madison, WI 53706 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Feldmann, DM (reprint author), Univ Wisconsin, Appl Supercond Ctr, Madison, WI 53706 USA. EM feldmann@cae.wisc.edu RI Larbalestier, David/B-2277-2008; Specht, Eliot/A-5654-2009; OI Larbalestier, David/0000-0001-7098-7208; Specht, Eliot/0000-0002-3191-2163; Gapud, Albert/0000-0001-9048-9230 NR 38 TC 32 Z9 32 U1 0 U2 4 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD AUG PY 2005 VL 20 IS 8 BP 2012 EP 2020 DI 10.1557/JMR.2005.0262 PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA 953CW UT WOS:000231054800011 ER PT J AU Misra, A Hoagland, RG AF Misra, A Hoagland, RG TI Effects of elevated temperature annealing on the structure and hardness of copper/niobium nanolayered films SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID THERMAL-STABILITY; THIN-FILMS; MULTILAYER STRUCTURES; SHAPE INSTABILITIES; COMPOSITES; INTERFACES; STRENGTH; BEHAVIOR; STRESS; COPPER AB We investigated the effects of elevated temperature vacuum annealing on the morphological stability and hardness of self-supported, textured, polycrystalline Cu-Nb nanolayered films with individual layer thickness varying from 15 to 75 nm. Films with layer thickness greater than approximately 35 nm are found to resist layer pinch-off and spheroidization even after long annealing times at 700 degrees C, while films with layer thickness similar to 15 nm exhibit layer pinch-off and evolve into an equiaxed grain microstructure. Nanoindentation measurements indicate almost no change in hardness after annealing for films that retain the layered morphology, in spite of the increase of in-plane grain dimensions. Significant decreases in hardness are noted for films that develop a coarsened equiaxed grain microstructure after annealing. The mechanism that leads to the development of a thermally stable nanolayered structure is analyzed. Also, the relative effects of in-plane grain size and layer thickness on the multilayer hardness are discussed. C1 Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA. RP Misra, A (reprint author), Los Alamos Natl Lab, Mat Sci & Technol Div, MS G755, Los Alamos, NM 87545 USA. EM amisra@lanl.gov RI Hoagland, Richard/G-9821-2012; Misra, Amit/H-1087-2012 NR 32 TC 60 Z9 60 U1 1 U2 33 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD AUG PY 2005 VL 20 IS 8 BP 2046 EP 2054 DI 10.1557/JMR.2005.0250 PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA 953CW UT WOS:000231054800015 ER PT J AU Lin, Y Wang, H Maiorov, B Hawley, ME Wetteland, CJ Arendt, PN Foltyn, SR Civale, L Jia, QX AF Lin, Y Wang, H Maiorov, B Hawley, ME Wetteland, CJ Arendt, PN Foltyn, SR Civale, L Jia, QX TI Comparative study of microstructural properties for YBa(2)Cu(3)O(7)films on single-crystal and Ni-based metal substrates SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID CRITICAL-CURRENT DENSITY; COATED CONDUCTORS; SUPERCONDUCTING PROPERTIES; BUFFER LAYERS; MGO TEMPLATE; THIN-FILMS; YBA2CU3O7; GROWTH; MICROSCOPY; DEPOSITION AB We conducted a comparative study of microstructural properties for YBa2Cu3O7 (YBCO) films on single-crystal MgO and polycrystalline Ni-based metal substrates with ion-beam-assisted deposited (IBAD) MgO as a template. The film grown on the metal substrate shows more crystalline imperfections with density of screw dislocations four times higher than that of the film on single-crystal MgO, as revealed by high-resolution x-ray diffraction (HRXRD). These high-density screw dislocation cores connect well and form bigger clustered grains as detected by scanning tunneling microscopy. Transmission electron microscopy studies confirm that the structural quality of YBCO on the Ni-based alloy is comparable to that on single-crystal MgO. All these factors contribute to our routine fabrication of high-quality YBCO films on metal substrates with critical current densities in self-field as high as those for the films grown on single-crystal MgO substrates. Superconducting properties in fields are also discussed. C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. RP Lin, Y (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, POB 1663, Los Alamos, NM 87545 USA. EM ylin@lanl.gov; qxjia@lanl.gov RI Jia, Q. X./C-5194-2008; Wang, Haiyan/P-3550-2014; lin, yuan/B-9955-2013; OI Wang, Haiyan/0000-0002-7397-1209; Maiorov, Boris/0000-0003-1885-0436 NR 20 TC 8 Z9 8 U1 0 U2 3 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD AUG PY 2005 VL 20 IS 8 BP 2055 EP 2060 DI 10.1557/JMR.2005.0252 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA 953CW UT WOS:000231054800016 ER PT J AU Song, SJ Wachsman, ED Rhodes, J Yoon, HS Lee, KH Zhang, G Dorris, SE Balachandran, U AF Song, SJ Wachsman, ED Rhodes, J Yoon, HS Lee, KH Zhang, G Dorris, SE Balachandran, U TI Hydrogen permeability and effect of microstructure on mixed protonic-electronic conducting Eu-doped strontium cerate SO JOURNAL OF MATERIALS SCIENCE LA English DT Article ID ELECTRICAL-PROPERTIES; MEMBRANES; SRCE0.95EU0.05O3-DELTA; PERMEATION; SEPARATION; CERAMICS; OXIDES AB The hydrogen permeability of SrCe0.95EU0.05O3-delta was studied as a function of temperature, hydrogen partial pressure (P-H2) gradient, and water vapor partial pressure (P-H2O) gradient. The effect of the microstructure on hydrogen permeability through a 1.72 mm thick membrane was investigated. The ambipolar conductivity calculated from hydrogen permeation fluxes showed the same P-O2 and P-H2 dependence as the electronic conductivity, for the experimental conditions. The small grained membrane showed higher hydrogen permeability when compared with the larger grained membrane over the entire temperature range investigated. (c) 2005 Springer Science + Business Media, Inc. C1 Argonne Natl Lab, Div Energy Technol, Ceram Sect, Argonne, IL 60439 USA. Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA. RP Song, SJ (reprint author), Argonne Natl Lab, Div Energy Technol, Ceram Sect, 9700 S Cass Ave, Argonne, IL 60439 USA. EM song@anl.gov NR 22 TC 30 Z9 33 U1 2 U2 9 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD AUG PY 2005 VL 40 IS 15 BP 4061 EP 4066 DI 10.1007/s10853-005-2841-7 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA 958LJ UT WOS:000231449500027 ER PT J AU Ocko, M Sarrao, JL Stubicar, N Aviani, I Simek, Z Stubicar, M AF Ocko, M Sarrao, JL Stubicar, N Aviani, I Simek, Z Stubicar, M TI Microhardness of the YbAgxIn1-xCu4 system SO JOURNAL OF MATERIALS SCIENCE LA English DT Article ID TRANSITION; HARDNESS AB We report Vickers microhardness measurements on flux grown single crystals of the YbAg(x)ln(1-x)Cu(4) alloy system. Although sample dependent, the microhardness exhibits a clear concentration dependence: in general, it decreases with x. The lattice parameter as a function of x exhibits a similar behavior. For x < 0.5, where the lattice parameter is almost constant, the microhardness exhibits a weak enhancement. Similar concentration dependence of the lattice parameter, resistivity and microhardness allows us to conclude that the microhardness reflects the evolution of the YbAg(x)ln(1-x)Cu(4) alloy system towards more metallic character with increasing x. (c) 2005 Springer Science + Business Media, Inc. C1 Univ Zagreb, Inst Phys, Zagreb 10000, Croatia. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Zagreb, Fac Sci, HR-10002 Zagreb, Croatia. RP Ocko, M (reprint author), Univ Zagreb, Inst Phys, Bijenicka C 46,Pb 304, Zagreb 10000, Croatia. EM ocko@ifs.hr RI Aviani, Ivica/F-5059-2017 NR 10 TC 0 Z9 0 U1 0 U2 3 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD AUG PY 2005 VL 40 IS 16 BP 4181 EP 4183 DI 10.1007/s10853-005-3821-7 PG 3 WC Materials Science, Multidisciplinary SC Materials Science GA 958AO UT WOS:000231417300004 ER PT J AU Cacciatori, SL Cerchiai, BL Della Vedova, A Ortenzi, G Scotti, A AF Cacciatori, SL Cerchiai, BL Della Vedova, A Ortenzi, G Scotti, A TI Euler angles for G(2) SO JOURNAL OF MATHEMATICAL PHYSICS LA English DT Article ID LIE GROUP-G; YANG-MILLS; DECONFINEMENT; VOLUME; SU(N) AB We provide a simple coordinatization for the group G(2), which is analogous to the Euler coordinatization for SU(2). We show how to obtain the general element of the group in a form emphasizing the structure of the fibration of G(2) with fiber SO(4) and base H, the variety of quaternionic subalgebras of octonions. In particular this allows us to obtain a simple expression for the Haar measure on G(2). Moreover, as a by-product it yields a concrete realization and an Einstein metric for H. (c) 2005 American Institute of Physics. C1 Univ Milan, Dipartimento Matemat, I-20133 Milan, Italy. Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy. Univ Calif Berkeley, Lawrence Berkeley Lab, Theory Grp, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Milan, Dipartimento Matemat & Applicaz, I-20126 Milan, Italy. Univ Milan, Dipartimento Matemat, I-20133 Milan, Italy. RP Cacciatori, SL (reprint author), Univ Milan, Dipartimento Matemat, Vial Saldini 50, I-20133 Milan, Italy. EM cacciatori@mi.infn.it; blcerchiai@lbl.gov; alberto.dellavedova@unimib.it; giovanni.ortenzi@unimib.it; ascotti@mindspring.com RI Della Vedova, Alberto/M-8696-2015; OI Della Vedova, Alberto/0000-0002-1804-2327; Cacciatori, Sergio Luigi/0000-0002-4167-9123; Cerchiai, Bianca Letizia/0000-0002-0109-0330; Ortenzi, Giovanni/0000-0003-2192-6737 NR 14 TC 16 Z9 16 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 0022-2488 J9 J MATH PHYS JI J. Math. Phys. PD AUG PY 2005 VL 46 IS 8 AR 083512 DI 10.1063/1.1993549 PG 17 WC Physics, Mathematical SC Physics GA 957RV UT WOS:000231391900035 ER PT J AU Moss, WC Haase, S Lyle, JM Agard, DA Sedat, JW AF Moss, WC Haase, S Lyle, JM Agard, DA Sedat, JW TI A novel 3D wavelet-based filter for visualizing features in noisy biological data SO JOURNAL OF MICROSCOPY-OXFORD LA English DT Article DE cryo-EM; EM Tomography; fluorescence microscopy; wavelets; 3D image processing ID LATERAL RESOLUTION; MICROSCOPY; TOMOGRAMS; TEMPLATE AB We have developed a three-dimensional (3D) wavelet-based filter for visualizing structural features in volumetric data. The only variable parameter is a characteristic linear size of the feature of interest. The filtered output contains only those regions that are correlated with the characteristic size, thus de-noising the image. We demonstrate the use of the filter by applying it to 3D data from a variety of electron microscopy samples, including low-contrast vitreous ice cryogenic preparations, as well as 3D optical microscopy specimens. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Calif San Francisco, Keck Adv Microscopy Lab, San Francisco, CA 94143 USA. Univ Calif San Francisco, Dept Biochem & Biophys, San Francisco, CA 94143 USA. Univ Calif San Francisco, Howard Hughes Med Inst, San Francisco, CA 94143 USA. RP Moss, WC (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM wmoss@llnl.gov FU NIGMS NIH HHS [GM31627, GM25101-26] NR 18 TC 10 Z9 10 U1 0 U2 0 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0022-2720 J9 J MICROSC-OXFORD JI J. Microsc.-Oxf. PD AUG PY 2005 VL 219 BP 43 EP 49 DI 10.1111/j.1365-2818.2005.01492.x PN 2 PG 7 WC Microscopy SC Microscopy GA 959HQ UT WOS:000231509200001 PM 16159339 ER PT J AU Hengartner, NW Sperlich, S AF Hengartner, NW Sperlich, S TI Rate optimal estimation with the integration method in the presence of many covariates SO JOURNAL OF MULTIVARIATE ANALYSIS LA English DT Article DE separable models; partial linear models; marginal integration; nonparametric regression ID ADDITIVE NONPARAMETRIC REGRESSION; EFFICIENT ESTIMATION; SEPARABLE MODELS; LINEAR-MODELS; DIMENSIONALITY; SMOOTHERS AB For multivariate regressors, integrating the Nadaraya-Watson regression smoother produces estimators of the lower-dimensional marginal components that are asymptotically normally distributed, at the optimal rate of convergence. Some heuristics, based on consistency of the pilot estimator, suggested that the estimator would not converge at the optimal rate of convergence in the presence of more than four covariates. This paper shows first that marginal integration with its internally normalized counterpart leads to rate-optimal estimators of the marginal components. We introduce the necessary modifications and give central limit theorems. Then, it is shown that the method apply also to more general models, in particular we discuss feasible estimation of partial linear models. The proofs reveal that the pilot estimator shall over-smooth the variables to be integrated, and, that the resulting estimator is itself a lower-dimensional regression smoother. Hence, finite sample properties of the estimator are comparable to those of low-dimensional nonparametric regression. Further advantages when starting with the internally normalized pilot estimator are its computational attractiveness and better performance (compared to its classical counterpart) when the covatiates are correlated and nonuniformly distributed. Simulation studies underline the excellent performance in comparison with so far known methods. (C) 2004 Elsevier Inc. All rights reserved. C1 Univ Carlos III Madrid, Dept Econ, E-28903 Getafe, Spain. Los Alamos Natl Lab, Stat Sci Grp, Los Alamos, NM 87545 USA. RP Sperlich, S (reprint author), Univ Carlos III Madrid, Dept Econ, C Madrid 126, E-28903 Getafe, Spain. EM nickh@lanl.gov; stefan.sperhch@uc3m.es NR 28 TC 26 Z9 26 U1 1 U2 1 PU ELSEVIER INC PI SAN DIEGO PA 525 B STREET, STE 1900, SAN DIEGO, CA 92101-4495, UNITED STATES SN 0047-259X J9 J MULTIVARIATE ANAL JI J. Multivar. Anal. PD AUG PY 2005 VL 95 IS 2 BP 246 EP 272 DI 10.1016/j.jmva.2004.09.010 PG 27 WC Statistics & Probability SC Mathematics GA 954WN UT WOS:000231186100002 ER PT J AU Suratwala, TI Miller, PE Ehrmann, PR Steele, RA AF Suratwala, TI Miller, PE Ehrmann, PR Steele, RA TI Polishing slurry induced surface haze on phosphate laser glasses SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article ID SUBCRITICAL CRACK-GROWTH AB The effects of residual polishing slurry on the surface topology of highly polished, Nd-doped meta-phosphate laser glasses are reported. Glass samples were pitched polished using cerium oxide or zirconium oxide slurry at different pHs and then washed by different methods that allowed varying amounts of residual slurry to 'dry' on the surface. Upon rewashing with water, some of the samples showed surface haze (scatter), which scaled with the amount of residual slurry. Profilometry measurements showed that the haze is the result of shallow surface pits (100 nm-20 pm wide x similar to 15 nm deep). Chemical analyses of material removed during rewashing, confirmed the removal of glass components as well as the preferential removal of modifier ions (e.g., kg(1+) and Mg2+). The surface pits appear to result from reaction of the glass with condensed liquid at the slurry particle-glass interface that produces water-soluble phosphate products that dissolves away with subsequent water contact. Aggressive washing, to remove residual slurry immediately following polishing, can minimize surface haze on phosphate glasses. It is desirable to eliminate haze from glass used in high-peak-power lasers, since it can cause scatter-induced optical modulation that can cause damage to downstream optics. (c) 2005 Elsevier B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Suratwala, TI (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA. EM suratwala1@llnl.gov RI Suratwala, Tayyab/A-9952-2013 OI Suratwala, Tayyab/0000-0001-9086-1039 NR 29 TC 12 Z9 14 U1 2 U2 17 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD AUG 1 PY 2005 VL 351 IS 24-26 BP 2091 EP 2101 DI 10.1016/j.jnoncrysol.2005.04.046 PG 11 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA 948JQ UT WOS:000230712500019 ER PT J AU Golenia, J Prykarpatsky, AK Prykarpatsky, YA AF Golenia, J Prykarpatsky, AK Prykarpatsky, YA TI The structure of Gelfand-Levitan-Marchenko type equations for Delsarte transmutation operators of linear multi-dimensional differential operators and operator pencils. Part 2 SO JOURNAL OF NONLINEAR MATHEMATICAL PHYSICS LA English DT Article; Proceedings Paper CT 36th Symposium on Mathematical Physics CY JUN 09-12, 2004 CL Torun, POLAND AB The differential-geometric and topological structure of Delsarte transmutation operators their associated Gelfand-Levitan-Marchenko type equations are studied making use of the de Rham-Hodge-Skrypnik differential complex. The relationships with spectral theory and special Berezansky type congruence properties of Delsarte transmuted operators are stated. Some applications to multi-dimensional differential operators are done including the three-dimensional Laplace operator and the two-dimensional classical Dirac operator and its multi-dimensional affine extension, related with self dual Yang-Mills equations. The soliton like solutions to the related set of nonlinear dynamical systems are discussed. C1 AGH Univ Sci & Technol, Dept Appl Math, PL-30059 Krakow, Poland. NAS, Inst Math, UA-01601 Kiev, Ukraine. Brookhaven Natl Lab, CDIC, Upton, NY 11973 USA. RP Golenia, J (reprint author), AGH Univ Sci & Technol, Dept Appl Math, PL-30059 Krakow, Poland. EM jnapora@wms.mat.agh.edu.pl; prykanat@cybergal.com; yarpy@bnl.gov NR 43 TC 0 Z9 0 U1 0 U2 0 PU NORBERT EULER PI LULEA PA LULEA UNIV TECHNOL, DEPT MATHEMATICS, SE-971 87 LULEA, SWEDEN SN 1402-9251 J9 J NONLINEAR MATH PHY JI J. Nonlinear Math. Phys. PD AUG PY 2005 VL 12 IS 3 BP 381 EP 408 DI 10.2991/jnmp.2005.12.3.5 PG 28 WC Mathematics, Applied; Physics, Mathematical SC Mathematics; Physics GA 918EC UT WOS:000228521800005 ER PT J AU Dai, Y Jia, X Thermer, R Hamaguchi, D Geissmann, K Lehmann, E Linder, HP James, M Groschel, F Wagner, W Bauer, GS AF Dai, Y Jia, X Thermer, R Hamaguchi, D Geissmann, K Lehmann, E Linder, HP James, M Groschel, F Wagner, W Bauer, GS TI The second SINQ target irradiation program, STIP-II SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT 6th International Workshop on Spallation Materials Technology (IWSMT-6) CY NOV 30-DEC 05, 2003 CL Hayama, JAPAN SP High Energy Accelerat Res Org, Japan Atomic Energy Res Inst, Forsch Zentrum Julich, Los Alamos Natl Lab, Paul Scherer Inst, Oak Ridge Natl Lab ID SPALLATION TARGET; MERCURY; ALLOY-718; WINDOW AB The second SINQ Target Irradiation Program (STIP-II) was performed in 2000 and 2001. More than 2000 specimens from more than 40 kinds of materials were irradiated up to 20 dpa and 1800 appm He in a temperature range of 80-450 degrees C. While the majority of specimens were irradiated in He gas environment, some specimens were in contact with liquid Hg and Pb-Bi. Neutron radiography was performed before and after irradiation, which indicated that Hg has leaked from one Hg-filled capsule, probably during a short temperature excursion caused by beam focusing. Specimens irradiated in He gas environment were unpacked and sorted. Except for TEM and dosimetry discs, almost all the other specimens were retrieved. About 20% of TEM and dosimetry discs were lost. Most of them are from brittle materials. Neutronics calculations were performed using the proton distribution profile obtained by gamma-rnapping oil the beam window of the AIMg(3) target container. The calculated He and H concentrations will be corrected with the results of measurements on some selected samples. (c) 2005 Elsevier B.V. All rights reserved. C1 Paul Scherrer Inst, Spallat Source Div, CH-5232 Villigen, Switzerland. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Forschungszentrum Julich, D-52425 Julich, Germany. RP Dai, Y (reprint author), Paul Scherrer Inst, Spallat Source Div, CH-5232 Villigen, Switzerland. EM yong.dai@psi.ch NR 15 TC 50 Z9 50 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD AUG 1 PY 2005 VL 343 IS 1-3 BP 33 EP 44 DI 10.1016/j.jnucmat.2005.01.027 PG 12 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 959CU UT WOS:000231495300007 ER PT J AU Takahashi, H AF Takahashi, H TI Material issues for the super neutrino beam and high-intensity spallation source (measurements using the multi-particle correlation) SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT 6th International Workshop on Spallation Materials Technology (IWSMT-6) CY NOV 30-DEC 05, 2003 CL Hayama, JAPAN SP High Energy Accelerat Res Org, Japan Atomic Energy Res Inst, Forsch Zentrum Julich, Los Alamos Natl Lab, Paul Scherer Inst, Oak Ridge Natl Lab AB I discuss the technology related to producing the high-intensity spallation neutron source, and the super neutrino beam for neutrino oscillation studied at Brookhaven National Laboratory, especially material integrity. The pitting problem for solid walled liquid mercury target, has been remedied by the Kolsterized target in some what, further study for required neutron source is needed. For neutrino source study, the low mass nuclei target such as carbon-carbon composite target is promising results and the use of the tacky gluey target composed with entangled string material for high mass nuclei seems to be desirable to get high integrity stand for large energy deposition by short proton injection. Recent developments in nano-technology, such as CCD, might alleviate the high demands of maintaining the integrity of the target material. I also describe the advantages of operating the many facilities including the fast-pulsed prompt super-critical reactor in a deep underground site. (c) 2005 Published by Elsevier B.V. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Takahashi, H (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM takahash@bnl.gov NR 17 TC 0 Z9 0 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD AUG 1 PY 2005 VL 343 IS 1-3 BP 53 EP 57 DI 10.1016/j.jnucmat.2005.02.006 PG 5 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 959CU UT WOS:000231495300009 ER PT J AU Haines, JR Riemer, BW Felde, DK Hunn, JD Pawel, SJ Tsai, CC AF Haines, JR Riemer, BW Felde, DK Hunn, JD Pawel, SJ Tsai, CC TI Summary of cavitation erosion investigations for the SNS mercury target SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT 6th International Workshop on Spallation Materials Technology (IWSMT-6) CY NOV 30-DEC 05, 2003 CL Hayama, JAPAN SP High Energy Accelerat Res Org, Japan Atomic Energy Res Inst, Forsch Zentrum Julich, Los Alamos Natl Lab, Paul Scherer Inst, Oak Ridge Natl Lab ID STAINLESS-STEEL; LANSCE-WNR; DAMAGE; TESTS AB Intense proton beam-induced heating of the spallation neutron source mercury target will cause pressure spikes that lead to the formation of cavitation bubbles in the mercury. Erosion of the mercury container walls caused by violent collapse of bubbles could potentially limit its service lifetime. ln-beam tests for a limited number Of Pulses (< 1000 pulses for each test target) have demonstrated that pitting damage appears to be especially sensitive to beam intensity, surface treatment, and gas injection. Using results of off-line pressure pulse tests conducted for a million cycles or more to scale the results from limited in-beam tests, it is concluded that the mercury target will last at least two weeks at it time-averaged proton beam power level of I MW. However, because of remaining uncertain ties, it is concluded that further research and development and target design efforts are needed to verify these conclusions and extend the target to higher operating powers and longer lifetimes. (c) 2005 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37830 USA. RP Haines, JR (reprint author), Oak Ridge Natl Lab, Spallat Neutron Source, 701 Scarboro Rd,MS-6474, Oak Ridge, TN 37830 USA. EM hainesjr@ornl.gov OI Riemer, Bernard/0000-0002-6922-3056 NR 20 TC 51 Z9 52 U1 1 U2 10 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD AUG 1 PY 2005 VL 343 IS 1-3 BP 58 EP 69 DI 10.1016/j.jnucmat.2004.08.033 PG 12 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 959CU UT WOS:000231495300010 ER PT J AU Futakawa, M Naoe, T Tsai, CC Kogawa, H Ishikura, S Ikeda, Y Soyama, H Date, H AF Futakawa, M Naoe, T Tsai, CC Kogawa, H Ishikura, S Ikeda, Y Soyama, H Date, H TI Pitting damage by pressure waves in a mercury target SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT 6th International Workshop on Spallation Materials Technology (IWSMT-6) CY NOV 30-DEC 05, 2003 CL Hayama, JAPAN SP High Energy Accelerat Res Org, Japan Atomic Energy Res Inst, Forsch Zentrum Julich, Los Alamos Natl Lab, Paul Scherer Inst, Oak Ridge Natl Lab ID CAVITATION EROSION; POWER AB Liquid-mercury target systems for MW-scale pulsed spallation neutron Sources are being developed. A proton beam will be injected into the mercury target to induce spallation reactions, The moment the proton beam bombards the target, pressure waves will be generated in the mercury by the thermally shocked heat deposition, Negative pressures will cause the formation of short-lived cavities in the mercury. Those cavities that collapse on the interface between the mercury and the target vessel wall will develop pits in the wall surface. In order to investigate the pitting damage due to large numbers of cycles up to 10 million, the pressure waves were simulated electromagnetically in a Magnetic IMpact Testing Machine (MIMTM). The obtained data were compared with erosion data from classical vibratory horn tests and a bubble dynamic simulation was carried out to investigate the repeated frequency effect. It is demonstrated that the mean depth of erosion is predictable using a homologous line in the steady state with mass loss independent of testing machines. The incubation period is shown to depend on materials, repeated frequency and imposed power or pressure. (c) 2005 Elsevier B.V. All rights reserved. C1 Ctr Proton Accelerator Facil, Japan Atom Res Inst, Tokai, Ibaraki 3191195, Japan. Ibaraki Univ, Hitachi, Ibaraki 316851, Japan. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Tohoku Univ, Sendai, Miyagi 9808579, Japan. Tohokugakuin Univ, Tagajo, Miyagi 9858537, Japan. RP Futakawa, M (reprint author), Ctr Proton Accelerator Facil, Japan Atom Res Inst, Tokai, Ibaraki 3191195, Japan. EM futakawa@popsvr.tokai.jaeri.go.jp NR 17 TC 45 Z9 46 U1 1 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD AUG 1 PY 2005 VL 343 IS 1-3 BP 70 EP 80 DI 10.1016/j.jnucmat.2004.07.063 PG 11 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 959CU UT WOS:000231495300011 ER PT J AU Riemer, BW AF Riemer, BW TI Benchmarking dynamic strain predictions of pulsed mercury spallation target vessels SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT 6th International Workshop on Spallation Materials Technology (IWSMT-6) CY NOV 30-DEC 05, 2003 CL Hayama, JAPAN SP High Energy Accelerat Res Org, Japan Atomic Energy Res Inst, Forsch Zentrum Julich, Los Alamos Natl Lab, Paul Scherer Inst, Oak Ridge Natl Lab ID LANSCE-WNR; TESTS AB Pulsed mercury spallation targets like that used in the Spallation Neutron Source (SNS) feature a target vessel that strains with each burst of protons. A robust simulation method for predicting the strain response of the target vessel is needed to evaluate the target's fatigue life. The interaction of pressure waves in the mercury with the vessel is a complex problem made more difficult by cavitation. The importance of benchmarking simulations had been recognized by SNS and its R&D program included experiments for measuring strains in various mercury-filled targets responding to single-beam pulses. Recent progress with simulations is reported. Results for two experimental targets are presented and compared to their test data, and the development of simulation parameters improved predictions is discussed. Overall the recent simulations do a fairly good job of predicting strain magnitude and dynamic response. In some target locations the predictions match data quite well, but this quality is not universally achieved. Published by Elsevier B.V. C1 Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA. RP Riemer, BW (reprint author), Oak Ridge Natl Lab, Spallat Neutron Source, 701 Scarboro Rd, Oak Ridge, TN 37831 USA. EM riemerbw@ornl.gov OI Riemer, Bernard/0000-0002-6922-3056 NR 18 TC 13 Z9 13 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD AUG 1 PY 2005 VL 343 IS 1-3 BP 81 EP 91 DI 10.1016/j.jnucmat.2005.01.026 PG 11 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 959CU UT WOS:000231495300012 ER PT J AU Pawel, SJ AF Pawel, SJ TI Assessment of cavitation-erosion resistance of 316LN stainless steel in mercury as a function of surface treatment SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT 6th International Workshop on Spallation Materials Technology (IWSMT-6) CY NOV 30-DEC 05, 2003 CL Hayama, JAPAN SP High Energy Accelerat Res Org, Japan Atomic Energy Res Inst, Forsch Zentrum Julich, Los Alamos Natl Lab, Paul Scherer Inst, Oak Ridge Natl Lab ID SNS TARGET TESTS; LANSCE-WNR AB A vibratory horn apparatus was used to assess the cavitation-erosion resistance in mercury of annealed type 316LN stainless steel as a function of surface treatment. The modifications examined included cold-working, welding, laser-alloying of the surface, and two low-temperature carburization treatments. Based on general wastage (measured by weight loss) and depth of surface relief/pitting, the best cavitation-erosion resistance in Hg was achieved with one of the carburization processes for which the substrate material was oriented such that inclusion stringers were parallel to the test surface. The most successful carburization process was found to be similarly effective for both wrought and welded 316LN. (c) 2005 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Pawel, SJ (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA. EM pawelsj@ornl.gov NR 12 TC 12 Z9 12 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD AUG 1 PY 2005 VL 343 IS 1-3 BP 101 EP 115 DI 10.1016/j.jnucmat.2004.10.170 PG 15 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 959CU UT WOS:000231495300014 ER PT J AU Farrell, K Specht, ED Pang, J Walker, LR Rar, A Mayotte, JR AF Farrell, K Specht, ED Pang, J Walker, LR Rar, A Mayotte, JR TI Characterization of a carburized surface layer on an austenitic stainless steel SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT 6th International Workshop on Spallation Materials Technology (IWSMT-6) CY NOV 30-DEC 05, 2003 CL Hayama, JAPAN SP High Energy Accelerat Res Org, Japan Atomic Energy Res Inst, Forsch Zentrum Julich, Los Alamos Natl Lab, Paul Scherer Inst, Oak Ridge Natl Lab DE pitting; carburization; hardness; lattice parameter; surface analyses AB Characterization tests were made of a commercial carburization treatment that has shown promise for hardening the surfaces of the austenitic stainless steel target vessel of the Spallation Neutron Source against cavitation erosion and pitting caused by the action of pulsed pressure waves in the liquid mercury target. The findings support most of the provider's promotional claims. The high surface hardness and the thickness of the hardened layer are validated, as are the hardness-depth profiles, The austenite lattice of the layer is enlarged and placed in a state of compressive stress and the surface is plastically distorted by the treatment. The corrosion resistance of the surface in selected acid media is greater than that for untreated austenite. The treated surface is not brittle and is quite resistant to cracking during straining. The maximum carbon content of the layer is measured at 3-4.5 wt%, versus 6-7 wt% cited by the provider. Contrary to the provider's assertion that all of the carbon is contained in supersaturated solid solution in the austenite phase, some of the carbon is present in an iron carbide phase located non-uniformly at the very surface. Inclusion stringers and delta-ferrite phase in the carburized layer are more prone to corrosion and may provide preferential sites for cavitation pitting. Published by Elsevier B.V. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Farrell, K (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. EM farrellk@ornl.gov RI Specht, Eliot/A-5654-2009 OI Specht, Eliot/0000-0002-3191-2163 NR 8 TC 32 Z9 33 U1 2 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD AUG 1 PY 2005 VL 343 IS 1-3 BP 123 EP 133 DI 10.1016/j.jnucmat.2004.10.169 PG 11 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 959CU UT WOS:000231495300016 ER PT J AU Strizak, JP Tian, H Liaw, PK Mansur, LK AF Strizak, JP Tian, H Liaw, PK Mansur, LK TI Fatigue properties of type 316LN stainless steel in air and mercury SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT 6th International Workshop on Spallation Materials Technology (IWSMT-6) CY NOV 30-DEC 05, 2003 CL Hayama, JAPAN SP High Energy Accelerat Res Org, Japan Atomic Energy Res Inst, Forsch Zentrum Julich, Los Alamos Natl Lab, Paul Scherer Inst, Oak Ridge Natl Lab ID ALUMINUM-ALLOY; CRACK GROWTH; EMBRITTLEMENT; NICKEL; FREQUENCY; BEHAVIOR; TARGET AB An extensive fatigue testing program on 316LN stainless steel was recently carried out to support the design of the mercury target container for the spallation neutron source (SNS) that is currently under construction at the Oak Ridge National Laboratory in the United States, The major objective was to determine the effects of mercury on fatigue behavior. The S-N fatigue behavior of 316LN stainless steel is characterized by it family of bilinear fatigue curves which are dependent on frequency, environment, mean stress and cold work. Generally, fatigue life increases with decreasing stress and levels off in the high cycle region to an endurance limit below which the material will not fail. For fully reversed loading as well as tensile mean stress loading conditions mercury had no effect on endurance limit, However, at higher stresses a synergistic relationship between mercury and cyclic loading frequency was observed at low frequencies. As expected, fatigue life decreased with decreasing frequency. but the response was more pronounced in mercury compared with air. As a result of liquid metal embrittlement (LME), fracture surfaces of specimens tested in mercury showed widespread brittle intergranular cracking as opposed to typical transgranular cracking for specimens tested in air. For fully reversed loading (zero mean stress) the effect of mercury disappeared as frequency increased to 10 Hz. For mean stress conditions with R-ratios of 0.1 and 0.3. LME was still evident at 10 Hz. but at 700 Hz the effect of mercury had disappeared (R = 0.1). Further, for higher R-ratios (0.5 and 0.75) Fatigue curves for 10 Hz showed no environmental effect. Finally, cold working (20%) increased tensile strength and hardness. and improved fatigue resistance. Fatigue behavior at 10 and 700 Hz was similar and no environmental effect was observed. (c) 2005 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37886 USA. RP Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA. EM strizakjp@ornl.gov NR 28 TC 24 Z9 24 U1 1 U2 10 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 EI 1873-4820 J9 J NUCL MATER JI J. Nucl. Mater. PD AUG 1 PY 2005 VL 343 IS 1-3 BP 134 EP 144 DI 10.1016/j.jnucmat.2005.03.019 PG 11 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 959CU UT WOS:000231495300017 ER PT J AU Maloy, SA Zubelewicz, A Romero, T James, MR Sommer, WF Dai, Y AF Maloy, SA Zubelewicz, A Romero, T James, MR Sommer, WF Dai, Y TI The high temperature three point bend testing of proton irradiated 316L stainless steel and Mod 9Cr-1Mo SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT 6th International Workshop on Spallation Materials Technology (IWSMT-6) CY NOV 30-DEC 05, 2003 CL Hayama, JAPAN SP High Energy Accelerat Res Org, Japan Atomic Energy Res Inst, Forsch Zentrum Julich, Los Alamos Natl Lab, Paul Scherer Inst, Oak Ridge Natl Lab ID STIP-I AB The predicted operating conditions for a lead-bismuth eutectic target to be used in an accelerator driven system for the Advanced Fuel Cycle Initiative span a temperature range of 300-600 degrees C while being irradiated by a high energy (similar to 600 MeV) proton beam. Such spallation conditions lead to high displacement rates coupled with high accumulation rates of helium and hydrogen up to 150 appm/dpa. Some candidate materials for these applications include Mod9Cr-1Mo and 316L stainless steel. To investigate the effect of irradiation on these materials, the mechanical properties are being measured through three point bend testing on Mod 9Cr-1Mo and 316L at 25, 250, 350 and 500 degrees C after irradiation in a high energy proton beam (500-800 MeV) to a dose of 9.8 dpa at temperatures from 200 to 320 degrees C. By comparing measurements made in bending to tensile measurements measured on identically irradiated materials, a measurement of 0.2% offset yield stress was obtained from 0.05% offset yield stress measured in three point bend testing. Yield stress increased by more than a factor of two after irradiation to 9.8 dpa. Observation of the outer fiber surface of 316L showed very localized deformation when tested after irradiation at 70 degrees C and deformation on multiple slip systems when tested after irradiation at 250-320 degrees C. Published by Elsevier B.V. C1 MST 8, Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Paul Scherrer Inst, Spallat Neutron Source Div, CH-52 Villigen, Switzerland. RP MST 8, Los Alamos Natl Lab, MS H816, Los Alamos, NM 87545 USA. EM maloy@lanl.gov RI Maloy, Stuart/A-8672-2009 OI Maloy, Stuart/0000-0001-8037-1319 NR 8 TC 4 Z9 4 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 EI 1873-4820 J9 J NUCL MATER JI J. Nucl. Mater. PD AUG 1 PY 2005 VL 343 IS 1-3 BP 191 EP 196 DI 10.1016/j.jnucmat.2005.03.027 PG 6 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 959CU UT WOS:000231495300024 ER PT J AU Maloy, SA James, MR Sommer, W Willcutt, GJ Lopez, M Romero, TJ Toloczko, MB AF Maloy, SA James, MR Sommer, W Willcutt, GJ Lopez, M Romero, TJ Toloczko, MB TI The effect of 800 MeV proton irradiation on the mechanical properties of tungsten at room temperature and at 475 degrees C SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT 6th International Workshop on Spallation Materials Technology (IWSMT-6) CY NOV 30-DEC 05, 2003 CL Hayama, JAPAN SP High Energy Accelerat Res Org, Japan Atomic Energy Res Inst, Forsch Zentrum Julich, Los Alamos Natl Lab, Paul Scherer Inst, Oak Ridge Natl Lab ID NEUTRON-IRRADIATION; TENSILE PROPERTIES; STAINLESS-STEEL; RECOVERY; MICROSTRUCTURE; 9CR-1MO; TARGET; DAMAGE; F82H AB For the accelerator production of tritium (APT), the accelerator driven transmutation facility (ADTF), and the advanced fuel cycle initiative (AFCI), tungsten is being proposed as a target material to produce neutrons. In this study, tungsten rods were irradiated at the 800 MeV Los Alamos Neutron Science Center (LANSCE) proton accelerator for six months. After irradiation to a maximum dose in the tungsten of 23.3 dpa at T-irr = 50-270 degrees C, the rods were sliced into sections, hardness tests were performed at room temperature, and compression tests were performed at room temperature and at 475 degrees C to assess the effect of irradiation on the mechanical properties of tungsten. The results show an increase in strength and a decrease in ductility with dose. Specimens tested at 475 degrees C had lower yield strength and reduced work hardening capability compared to specimens tested at room temperature. Published by Elsevier B.V. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Pacific NW Natl Lab, MS P8-15,POB 999, Richland, WA 99352 USA. EM mychailo.toloczko@pnl.gov RI Maloy, Stuart/A-8672-2009 OI Maloy, Stuart/0000-0001-8037-1319 NR 31 TC 12 Z9 13 U1 1 U2 13 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 EI 1873-4820 J9 J NUCL MATER JI J. Nucl. Mater. PD AUG 1 PY 2005 VL 343 IS 1-3 BP 219 EP 226 DI 10.1016/j.jnucmat.2004.12.018 PG 8 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 959CU UT WOS:000231495300028 ER PT J AU Dai, Y Jia, X Maloy, SA AF Dai, Y Jia, X Maloy, SA TI Annealing effects on mechanical properties and microstructure of F82H irradiated at <= 60 degrees C with 800 MeV protons SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT 6th International Workshop on Spallation Materials Technology (IWSMT-6) CY NOV 30-DEC 05, 2003 CL Hayama, JAPAN SP High Energy Accelerat Res Org, Japan Atomic Energy Res Inst, Forsch Zentrum Julich, Los Alamos Natl Lab, Paul Scherer Inst, Oak Ridge Natl Lab ID MARTENSITIC STEEL AB Martensitic steel F82H was irradiated with 800 MeV protons up to 7.8 dpa at low temperatures <= 60 degrees C. Tensile tests have been performed at 22, 160, 250, 350 and 400 degrees C. The microstructure of specimens with doses of 6-7.8 dpa after annealing 20 min and 2 h at 160, 250, 350 and 400 degrees C has been studied. The tensile results show that the yield of irradiated specimens decreases gradually with increasing test temperature. The ductility starts to recover at about 300 degrees C and is substantially recovered at 400 degrees C. The recovery depends on irradiation dose. The TEM results indicate that the number density of dislocation loops induced by irradiation decreases with annealing temperature, while the mean size of loops increases only slightly at 400 degrees C. A part of dislocation loops transferred into network dislocations and resulted in increase of network dislocation density. However, the total dislocation density (including loops) decreases gradually with annealing temperature. (c) 2005 Elsevier B.V. All rights reserved. C1 Paul Scherrer Inst, Spallat Source Div, CH-5232 Villigen, Switzerland. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Paul Scherrer Inst, Spallat Source Div, CH-5232 Villigen, Switzerland. EM yong.dai@psi.ch RI Maloy, Stuart/A-8672-2009 OI Maloy, Stuart/0000-0001-8037-1319 NR 12 TC 5 Z9 5 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 EI 1873-4820 J9 J NUCL MATER JI J. Nucl. Mater. PD AUG 1 PY 2005 VL 343 IS 1-3 BP 241 EP 246 DI 10.1016/j.jnucmat.2004.11.022 PG 6 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 959CU UT WOS:000231495300031 ER PT J AU Haines, JR AF Haines, JR TI Cavitation-erosion in mercury spallation neutron target source SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT 6th International Workshop on Spallation Materials Technology (IWSMT-6) CY NOV 30-DEC 05, 2003 CL Hayama, JAPAN SP High Energy Accelerat Res Org, Japan Atomic Energy Res Inst, Forsch Zentrum Julich, Los Alamos Natl Lab, Paul Scherer Inst, Oak Ridge Natl Lab C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Haines, JR (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM hainesjr@ornl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD AUG 1 PY 2005 VL 343 IS 1-3 BP 366 EP 366 DI 10.1016/j.jnucmat.2005.03.005 PG 1 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 959CU UT WOS:000231495300049 ER PT J AU Maloy, SA AF Maloy, SA TI Materials issues in a high power spallation target SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT 6th International Workshop on Spallation Materials Technology (IWSMT-6) CY NOV 30-DEC 05, 2003 CL Hayama, JAPAN SP High Energy Accelerat Res Org, Japan Atomic Energy Res Inst, Forsch Zentrum Julich, Los Alamos Natl Lab, Paul Scherer Inst, Oak Ridge Natl Lab C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Maloy, SA (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM maloy@lanl.gov RI Maloy, Stuart/A-8672-2009 OI Maloy, Stuart/0000-0001-8037-1319 NR 0 TC 4 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD AUG 1 PY 2005 VL 343 IS 1-3 BP 367 EP 367 DI 10.1016/j.jnucmat.2005.03.006 PG 1 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 959CU UT WOS:000231495300050 ER PT J AU Mansur, LK AF Mansur, LK TI Spallation materials R&D: Remarks on progress and future SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT 6th International Workshop on Spallation Materials Technology (IWSMT-6) CY NOV 30-DEC 05, 2003 CL Hayama, JAPAN SP High Energy Accelerat Res Org, Japan Atomic Energy Res Inst, Forsch Zentrum Julich, Los Alamos Natl Lab, Paul Scherer Inst, Oak Ridge Natl Lab C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Mansur, LK (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM mansurlk@ornl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD AUG 1 PY 2005 VL 343 IS 1-3 BP 370 EP 371 DI 10.1016/j.jnucmat.2005.03.008 PG 2 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 959CU UT WOS:000231495300052 ER PT J AU El Fakhri, G Sitek, A Guerin, B Kijewski, MF Di Carli, MF Moore, SC AF El Fakhri, G Sitek, A Guerin, B Kijewski, MF Di Carli, MF Moore, SC TI Quantitative dynamic cardiac Rb-82 PET using generalized factor and compartment analyses SO JOURNAL OF NUCLEAR MEDICINE LA English DT Article DE quantitative Rb-82 cardiac PET; factor analysis of dynamic sequences; compartment analysis ID POSITRON EMISSION TOMOGRAPHY; GENERATOR-PRODUCED RB-82; MYOCARDIAL-PERFUSION; PHOTON TRACKING; TRANSFORMATION; QUANTIFICATION; IMPLEMENTATION; SEQUENCES; IMAGES; SPECT AB We have addressed 2 major challenges of Rb-82 cardiac PET, noninvasive estimation of an accurate input function and absolute quantitation of myocardial perfusion, using a generalized form of least-squares factor analysis of dynamic sequences (GFADS) and a novel compartment analysis approach. Methods: Left and right ventricular (LV+RV) time-activity curves (TACs) were generated from 10 rest/stress studies, and 30 myocardial TACs were modeled to cover a range of clinical values. Two-dimensional PET Monte Carlo simulations of the LV, RV, myocardium, and other organs were generated separately and combined using the above TACs to form 30 realistic dynamic 82Rb studies. LV and RV TACs were estimated by GFADS and used as input to a 2-compartment kinetic analysis that estimates parametric maps of myocardial tissue extraction (k(1)) and egress (k(2)), as well as LV+RV contributions (f(v), r(v)), by orthogonal voxel grouping. In addition, 13 patients were injected with 2.22 +/- 0.19 GBq (60 +/- 5 MCi) of Rb-82 and imaged dynamically for 6 min at rest and during dipyridamole stress. Results: In Monte Carlo simulations, GFADS yielded estimates of the 3 factors and corresponding factor images, with average errors of -4.2% +/- 6.3%, 3.5% +/- 4.3%, and 2.0% +/- 5.5% in the LV, RV, and myocardial factor estimates, respectively. The estimates were significantly more accurate and robust to noise than those obtained using TACs based on manually drawn volumes of interest (P < 0.01). The 2-compartment approach yielded accurate k(1), k(2), f(v), and rv parametric maps; the average error of estimates of k(1) was 6.8% +/- 3.6%. In all patient studies, our approach yielded robust estimates of k(1), k(2), f(v), and r(v), which correlated very well with the status of the subject and the catheterization results. Conclusion: Quantitative dynamic 82Rb PET using generalized factor analysis of dynamic sequences and compartmental modeling yields estimates of parameters of absolute myocardial perfusion and kinetics with errors of < 9%. C1 Brigham & Womens Hosp, Dept Radiol, Div Nucl Med, Boston, MA 02115 USA. Harvard Univ, Sch Med, Div Nucl Med, Dept Radiol, Boston, MA 02115 USA. Ernest Orlando Lawrence Berkeley Natl Labs, Berkeley, CA USA. RP El Fakhri, G (reprint author), Brigham & Womens Hosp, Dept Radiol, Div Nucl Med, 75 Francis St, Boston, MA 02115 USA. EM elfakhri@bwh.harvard.edu OI Sitek, Arkadiusz/0000-0002-0677-4002 FU NIBIB NIH HHS [R01 EB000802, R01-EB000802, R01-EB001989] NR 29 TC 80 Z9 81 U1 0 U2 4 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD AUG PY 2005 VL 46 IS 8 BP 1264 EP 1271 PG 8 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 953SY UT WOS:000231102000008 PM 16085581 ER PT J AU Wood, GO AF Wood, GO TI Estimating service lives of air-purifying respirator cartridges for reactive gas removal SO JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HYGIENE LA English DT Article DE activated carbon; cartridges; mixtures; organic vapors; respiratory protection ID WHEELER-JONAS EQUATION; ACTIVATED CARBONS; ADSORPTION; COEFFICIENTS; CANISTERS; CHLORINE; CYANOGEN; VAPORS AB A mathematical Model has been developed to estimate set,vice lives of air-purijying respirator cartridges that remove gases reactively from flowing air. Most gases, because of their high volatility and low polarizability, are not effectively removed by physical adsorption on activated carbon. Models previously developed for toxic organic vapors cannot estimate service lives of cartridges for toxic gases. Often, an activated carbon is impregnated with a chemical to enhance gas removal by chemical reaction(s). The kinds of reactions, types and amounts of impregnants, and effects of the presence of water vary; therefore, the model requires user inputs of gas capacity and water effect parameters. Ideally, these should be available from manufacturers of the cartridges. If they are not, they can be extracted from measured breakthrough times using this model. The key to this model is the observation that adsorption rates of gases can be adequately quantified by the same correlations that have been reported for organic vapors. The resulting model has been used to correlate and predict breakthrough times for several common toxic gases. C1 Los Alamos Natl Lab, Ind Hyg & Safety Grp, Los Alamos, NM USA. RP Wood, GO (reprint author), 40 San Juan St, Los Alamos, NM 87544 USA. EM GerryConsulting@cs.com NR 23 TC 3 Z9 3 U1 0 U2 7 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA SN 1545-9624 J9 J OCCUP ENVIRON HYG JI J. Occup. Environ. Hyg. PD AUG PY 2005 VL 2 IS 8 BP 414 EP 423 DI 10.1080/15459620591034259 PG 10 WC Environmental Sciences; Public, Environmental & Occupational Health SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health GA 952WE UT WOS:000231035600007 PM 16012083 ER PT J AU Allen, PJ Johnson, BR Riley, BJ AF Allen, PJ Johnson, BR Riley, BJ TI Photo-onidation of thermally evaporated As2S3 thin films SO JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS LA English DT Article; Proceedings Paper CT 2nd International Workshop on Amorphous and Nanostructures Chalcogenides CY JUN 20-24, 2005 CL Sinaia, ROMANIA SP Minist Educ & Res, ROMGAZ SA DE As2S3; thin film; photo-oxidation; SEM; EDX; XRD; As2O3 ID CHALCOGENIDE FILMS; GLASSES AB Photo-oxidation of arsenic trisulfide is the process whereby the surface of As2S3 glass is chemically altered and degraded due to exposure to light in the presence of water vapor. For as-deposited, thermally evaporated, As2S3 thin films the degradation process and the subsequent products formed vary as a function of incident wavelength, This process was studied by exposing as-deposited thin films to six different wavelengths from 380 to 525 nm in a controlled temperature and humidity environment. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and x-ray diffraction (XRD) were used to characterize the thin films before and after exposure. At wavelengths less than 428 nm, crystalline arsenolite (As2O3) formed on the surface, with only minor modification of the short-range molecular structure of the film. At longer wavelengths, the short range order of the film was altered from the as-deposited state to that typical of thermal annealing. A mechanism to explain these processes is proposed. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Allen, PJ (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM Paul.Allen@pnl.gov NR 17 TC 18 Z9 18 U1 0 U2 1 PU NATL INST OPTOELECTRONICS PI BUCHAREST-MAGURELE PA 1 ATOMISTILOR ST, PO BOX MG-5, BUCHAREST-MAGURELE 76900, ROMANIA SN 1454-4164 J9 J OPTOELECTRON ADV M JI J. Optoelectron. Adv. Mater. PD AUG PY 2005 VL 7 IS 4 BP 1759 EP 1764 PG 6 WC Materials Science, Multidisciplinary; Optics; Physics, Applied SC Materials Science; Optics; Physics GA 957XK UT WOS:000231406500008 ER PT J AU McLendon, W Hendrickson, B Plimpton, SJ Rauchwerger, L AF McLendon, W Hendrickson, B Plimpton, SJ Rauchwerger, L TI Finding strongly connected components in distributed graphs SO JOURNAL OF PARALLEL AND DISTRIBUTED COMPUTING LA English DT Article DE strongly connected components; graph algorithm; parallel computing ID ALGORITHMS AB The traditional, serial, algorithm for finding the strongly connected components in a graph is based on depth first search and has complexity which is linear in the size of the graph. Depth first search is difficult to parallelize, which creates a need for a different parallel algorithm for this problem. We describe the implementation of a recently proposed parallel algorithm that finds strongly connected components in distributed graphs, and discuss how it is used in a radiation transport solver. (c) 2005 Elsevier Inc. All rights reserved. C1 Sandia Natl Labs, Dept Computat Sci, Albuquerque, NM 87185 USA. Texas A&M Univ, Dept Comp Sci, College Stn, TX 77843 USA. RP McLendon, W (reprint author), Sandia Natl Labs, Dept Computat Sci, POB 5800, Albuquerque, NM 87185 USA. EM wcmclen@sandia.gov; bahendr@sandia.gov; sjplimp@sandia.gov; rwerger@cs.tamu.edu NR 17 TC 11 Z9 11 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 0743-7315 J9 J PARALLEL DISTR COM JI J. Parallel Distrib. Comput. PD AUG PY 2005 VL 65 IS 8 BP 901 EP 910 DI 10.1016/j.jpdc.2005.03.007 PG 10 WC Computer Science, Theory & Methods SC Computer Science GA 945HU UT WOS:000230494400002 ER PT J AU Fellis, KJ Esch, GW AF Fellis, KJ Esch, GW TI Autogenic-allogenic status affects interpond community similarity and species area relationship of macroparasites in the bluegill sunfish, Lepomis macrochirus, from a series of freshwater ponds in the Piedmont area of North Carolina SO JOURNAL OF PARASITOLOGY LA English DT Article ID PARASITE COMMUNITIES; BROWN TROUT; LAKES; FISH; COLONIZATION; EXTINCTION AB The effects of autogenic-allogenic status on the species-area relationship and the relationship between geographic distance and intercommunity dissimilarity were investigated in macroparasite communities of the bluegill sunfish Lepomis macrochirus. Rank correlation analyses were used to examine the relationship between pond surface area and species richness of all species collectively and of autogenic species and allogenic species separately. A positive relationship was found for allogenic species, whereas there was no association for all species, nor was there an association when the study was restricted to autogenic species. Mantel tests were used to determine the relationship between geographic distance and community dissimilarity for all species and for autogenic and allogenic species independently. Total community dissimilarity and allogenic dissimilarity were found to be influenced by geographic distance, whereas autogenic dissimilarity was random with regard to interpond distances. These findings serve to illustrate the importance of the autogenic-allogenic dichotomy and demonstrate that dispersal ability can influence commonly observed ecological patterns. C1 Wake Forest Univ, Dept Biol, Winston Salem, NC 27109 USA. RP Fellis, KJ (reprint author), Lawrence Livermore Natl Lab, Genome Biol Div, L-441,POB 808, Livermore, CA 94551 USA. EM fellis2@llnl.gov NR 19 TC 19 Z9 20 U1 0 U2 5 PU AMER SOC PARASITOLOGISTS PI LAWRENCE PA 810 EAST 10TH STREET, LAWRENCE, KS 66044 USA SN 0022-3395 J9 J PARASITOL JI J. Parasitol. PD AUG PY 2005 VL 91 IS 4 BP 764 EP 767 DI 10.1645/GE-451R.1 PG 4 WC Parasitology SC Parasitology GA 963OS UT WOS:000231814200006 PM 17089741 ER PT J AU Bleasby, K Hall, LA Perry, JL Mohrenweiser, HW Pritchard, JB AF Bleasby, K Hall, LA Perry, JL Mohrenweiser, HW Pritchard, JB TI Functional consequences of single nucleotide polymorphisms in the human organic anion transporter hOAT1 (SLC22A6) SO JOURNAL OF PHARMACOLOGY AND EXPERIMENTAL THERAPEUTICS LA English DT Article ID EPITHELIAL-CELL LINE; CATION TRANSPORTER; RENAL SECRETION; HUMAN KIDNEY; EXPRESSION; PROTEIN; CLONING; GENES; IDENTIFICATION; CIDOFOVIR AB The human organic anion transporter hOAT1 (SLC22A6) contributes to the uptake of a range of small organic anions across the basolateral membrane of the renal proximal tubule and drives their urinary elimination. The aim of this study was to identify genetic variants of hOAT1 and to investigate potential effects on the functional properties of this transporter. Twenty single nucleotide polymorphisms ( SNPs) in hOAT1 were identified in genomic DNA from 92 individuals of African, Asian, and Caucasian origin. Two SNPs encoded changes in amino acid sequence; arginine to histidine ( residue 50) and lysine to isoleucine ( residue 525). Significantly, these SNPs were only present in the samples of African origin. When expressed in Xenopus oocytes, wild-type R50-hOAT1 and the variants R50H-hOAT1 and K525I-hOAT1 all mediated the probenecidsensitive uptake of the classic organic anion para-aminohippurate (PAH). Kinetic analysis indicated that the transport affinity (K-m) for PAH was unchanged in the variants, compared with wild type. Interestingly, the K m for the nucleoside phosphonate analogs adefovir, cidofovir, and tenofovir seemed to be decreased in the R50H-hOAT1 variant compared with the wild type, whereas the kinetics of K525I-hOAT1 remained unchanged. In conclusion, this is the first study to identify variation of hOAT1 in a racially diverse sample and to investigate the functional properties of the resulting variants. Since hOAT1 has been suggested as the basis of nephrotoxicity induced by nucleoside phosphonate analogs, this study raises the intriguing possibility that individuals with genetic variation in hOAT1, such as R50H, may display different handling of these drugs. C1 NIEHS, Lab Pharmacol & Chem, NIH, Res Triangle Pk, NC 27709 USA. Lawrence Livermore Natl Lab, Livermore, CA USA. RP Pritchard, JB (reprint author), NIEHS, Lab Pharmacol & Chem, NIH, 111 TW Alexander Dr, Res Triangle Pk, NC 27709 USA. EM pritcha3@niehs.nih.gov FU NIEHS NIH HHS [Y1-ES-8054-05]; Wellcome Trust NR 38 TC 69 Z9 76 U1 0 U2 4 PU AMER SOC PHARMACOLOGY EXPERIMENTAL THERAPEUTICS PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3995 USA SN 0022-3565 J9 J PHARMACOL EXP THER JI J. Pharmacol. Exp. Ther. PD AUG PY 2005 VL 314 IS 2 BP 923 EP 931 DI 10.1124/jpet.105.084301 PG 9 WC Pharmacology & Pharmacy SC Pharmacology & Pharmacy GA 946CS UT WOS:000230550300053 PM 15914676 ER PT J AU Frantz, BR Foster, MS Riosmena-Rodriguez, R AF Frantz, BR Foster, MS Riosmena-Rodriguez, R TI Clathromorphum nereostratum (Corallinales, Rhodophyta): The oldest alga? SO JOURNAL OF PHYCOLOGY LA English DT Article DE accelerator mass spectrometry; age; Adak Island; Clathromorphum nereostratum; growth bands; nongeniculate coralline; oldest alga ID ACCELERATOR MASS-SPECTROMETRY; GULF-OF-CALIFORNIA; GROWTH; RADIOCARBON; PACIFIC; MEXICO; RECORD; AGE AB The longevity of organisms is intrinsically interesting and can provide useful information on their population structure and dynamics and the dynamics of associated communities. With the exception of perennial Laminariales that have rings in the stipe, the life spans of most perennial macroalgae are unknown or based on anecdotal observations. Using morphological analyses combined with the location and time of the rise in (14)C from atmospheric nuclear testing within the thallus, we determined that the growth rate of a specimen of Clathromorphum nereostratum Lebednik from Adak Island was 0.30 mm.yr(-1), the 3(0) bands within the thallus were annual, and the specimen sampled was 61-75 years old. Living crusts of this species from the same geographic region are reported to be up to 20 cm thick. Assuming our growth rate is typical, C. nereostratum can be approximately 700 years old, the oldest known living alga. This longevity and consistent banding within the thallus suggest that smaller scale sampling and additional chemical analyses of this alga could provide a detailed long-term record of environmental variation at high latitudes in the North Pacific. C1 Moss Landing Marine Labs, Moss Landing, CA 95039 USA. Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA. Univ Autonoma Baja California, Programa Invest Bot Marina, La Paz, Baja Calif Sur 23080, Mexico. RP Foster, MS (reprint author), Moss Landing Marine Labs, POB 450, Moss Landing, CA 95039 USA. EM foster@mlml.calstate.edu NR 20 TC 34 Z9 36 U1 0 U2 6 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0022-3646 J9 J PHYCOL JI J. Phycol. PD AUG PY 2005 VL 41 IS 4 BP 770 EP 773 DI 10.1111/j.1529-8817.2005.00107.x PG 4 WC Plant Sciences; Marine & Freshwater Biology SC Plant Sciences; Marine & Freshwater Biology GA 954HS UT WOS:000231146000007 ER PT J AU Beane, SR van Kolck, U AF Beane, SR van Kolck, U TI The role of the roper in QCD SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS LA English DT Article ID LARGE-N-C; VECTOR COUPLING CONSTANT; EXCITED BARYONS; LATTICE QCD; ALGEBRAIC REALIZATION; CURRENT COMMUTATORS; MAGNETIC MOMENTS; CHIRAL-SYMMETRY; FERMION ACTION; QUARK-MODEL AB We show that existing data suggest a simple scenario in which the nucleon and the Delta and Roper resonances act as chiral partners in a reducible representation of the full QCD chiral symmetry group. We discuss the peculiar interpretation of this scenario using spin-flavour symmetries of the naive constituent quark model, as well as the consistency of the scenario with large-N-c expectations. C1 Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA. Univ New Hampshire, Dept Phys, Durham, NH 03824 USA. Jefferson Lab, Newport News, VA 23606 USA. Univ Arizona, Dept Phys, Tucson, AZ 85721 USA. Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA. RP Beane, SR (reprint author), Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA. NR 58 TC 5 Z9 5 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0954-3899 EI 1361-6471 J9 J PHYS G NUCL PARTIC JI J. Phys. G-Nucl. Part. Phys. PD AUG PY 2005 VL 31 IS 8 BP 921 EP 933 DI 10.1088/0954-3899/31/8/021 PG 13 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 957BO UT WOS:000231344500022 ER PT J AU Bender, M Heenen, PH AF Bender, M Heenen, PH TI Excited states of the mean field SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS LA English DT Article; Proceedings Paper CT Workshop on Nuclear Forces and Quantum Many-Body Problem CY OCT 04-08, 2004 CL Inst Nucl Theory, Seattle, WA HO Inst Nucl Theory ID ANGULAR-MOMENTUM; WAVE-FUNCTIONS; QUADRUPOLE; PROJECTION; NUCLEI; O-16 AB Starting from self-consistent mean-field models, we discuss why and how to go beyond self-consistent mean-field models. To include long-range correlations from fluctuations in collective degrees of freedom, one has to consider symmetry restoration and configuration mixing, which give access to ground-state correlations and spectra. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Univ Libre Bruxelles, Serv Phys Nucl Theor, B-1050 Brussels, Belgium. RP Bender, M (reprint author), Argonne Natl Lab, Div Phys, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 24 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0954-3899 EI 1361-6471 J9 J PHYS G NUCL PARTIC JI J. Phys. G-Nucl. Part. Phys. PD AUG PY 2005 VL 31 IS 8 BP S1367 EP S1375 DI 10.1088/0954-3899/31/8/015 PG 9 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 957BO UT WOS:000231344500016 ER PT J AU Luu, TC AF Luu, TC TI Bloch-Horowitz schemes SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS LA English DT Article; Proceedings Paper CT Workshop on Nuclar Forces and Quantum Many-Body Problem CY OCT 04-08, 2004 CL Inst Nucl Theory, Seattle, WA HO Inst Nucl Theory ID MONTE-CARLO CALCULATIONS; NUCLEI AB I review the different methods used in calculating the effective interaction given by the energy-dependent Bloch-Horowitz (BH) equation. These methods are grouped into non-perturbative schemes, such as the Lanczos-based calculations and Faddeev-like calculations, and perturbative schemes. I show leading order BH calculations for p-shell nuclei and address convergence issues of this formalism. I comment on the need for some form of confining mean-field interaction within the BH formalism. C1 Los Alamos Natl Lab, T Div, Los Alamos, NM 87545 USA. RP Luu, TC (reprint author), Los Alamos Natl Lab, T Div, MS B227, Los Alamos, NM 87545 USA. EM tluu@lanl.gov NR 21 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0954-3899 J9 J PHYS G NUCL PARTIC JI J. Phys. G-Nucl. Part. Phys. PD AUG PY 2005 VL 31 IS 8 BP S1311 EP S1320 DI 10.1088/0954-3899/31/8/009 PG 10 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 957BO UT WOS:000231344500010 ER PT J AU Michel, N Nazarewicz, W Ploszajczak, M AF Michel, N Nazarewicz, W Ploszajczak, M TI Numerical aspects of the Gamow shell model SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS LA English DT Article; Proceedings Paper CT Workshop on Nuclar Forces and Quantum Many-Body Problem CY OCT 04-08, 2004 CL Inst Nucl Theory, Seattle, WA HO Inst Nucl Theory ID EXPANSIONS; NUCLEI; STATES AB Recently, the shell model in, the complex k-plane (the so-called Gamow shell model) has been formulated using a complex Berggren ensemble representing bound single-particle states,, single-particle resonances and non-resonant continuum states. The single-particle basis used is that of the Hartree-Fock potential generated self-consistently by a finite-range residual interaction. In this framework, we shall discuss the numerical aspects of the Gamow shell model related to the optimization of the, shell-model basis. C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA. Warsaw Univ, Inst Theoret Phys, PL-00681 Warsaw, Poland. CEA, DSM, CNRS, IN2P3,GANIL, F-14076 Caen, France. RP Michel, N (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. EM michel@mail.phy.ornl.gov NR 18 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0954-3899 J9 J PHYS G NUCL PARTIC JI J. Phys. G-Nucl. Part. Phys. PD AUG PY 2005 VL 31 IS 8 BP S1321 EP S1328 DI 10.1088/0954-3899/31/8/010 PG 8 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 957BO UT WOS:000231344500011 ER PT J AU Papenbrock, T Dean, DJ AF Papenbrock, T Dean, DJ TI Density matrix renormalization group and wavefunction factorization for nuclei SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS LA English DT Article; Proceedings Paper CT Workshop on Nuclar Forces and Quantum Many-Body Problem CY OCT 04-08, 2004 CL Inst Nucl Theory, Seattle, WA HO Inst Nucl Theory ID SHELL-MODEL; SYSTEMS AB We employ the density-matrix renormalization group (DMRG) and the wavefunction factorization method for the numerical solution of large-scale nuclear structure problems.. The DMRG exhibits an improved convergence for problems with realistic interactions due to the implementation of the finite algorithm. The wavefunction factorization of f pg-shell nuclei yields rapidly converging approximations that are at the,present frontier for large-scale shell-model calculations. C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Papenbrock, T (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. OI Dean, David/0000-0002-5688-703X; Papenbrock, Thomas/0000-0001-8733-2849 NR 28 TC 15 Z9 16 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0954-3899 J9 J PHYS G NUCL PARTIC JI J. Phys. G-Nucl. Part. Phys. PD AUG PY 2005 VL 31 IS 8 BP S1377 EP S1383 DI 10.1088/0954-3899/34/8/016 PG 7 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 957BO UT WOS:000231344500017 ER PT J AU Wloch, M Gour, JR Piecuch, P Dean, DJ Hjorth-Jensen, M Papenbrock, T AF Wloch, M Gour, JR Piecuch, P Dean, DJ Hjorth-Jensen, M Papenbrock, T TI Coupled-cluster calculations for ground and excited states of closed- and open-shell nuclei using methods of quantum chemistry SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS LA English DT Article; Proceedings Paper CT Workshop on Nuclear Forces and Quantum Many-Body Problem CY OCT 04-08, 2004 CL Inst Nucl Theory, Seattle, WA HO Inst Nucl Theory ID MODEL-SPACE; TRIPLES; FIELD; EQUATIONS; ENERGIES; SINGLES; DOUBLES; FORCES; O-16 AB We discuss large-scale ab initio calculations of ground and excited states of O-16 and preliminary calculations for O-15 and O-17 using coupled-cluster methods and algorithms developed in quantum chemistry. By using realistic two-body interactions and the renormalized form of the Hamiltonian obtained with a no-core G-matrix approach, we are able to obtain the. virtually converged results for O-16 and promising results for O-15 and O-17 at the level of two-body interactions. The calculated properties other than binding and excitation energies include charge radius and,charge form factor.. The relatively low costs of coupled-cluster calculations which are characterized by the low-order polynomial scaling with the system size, enable us to probe large model spaces with up to seven or eight major oscillator shells, for which nontruncated shell-model. calculations for nuclei with A = 15-17 active particles are presently not possible. C1 Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA. Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Univ Oslo, Ctr Math Applicat, N-0316 Oslo, Norway. Univ Oslo, Dept Phys, N-0316 Oslo, Norway. RP Wloch, M (reprint author), Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA. EM piecuch@cem.msu.edu RI Hjorth-Jensen, Morten/B-1417-2008; Piecuch, Piotr/C-4435-2011; OI Dean, David/0000-0002-5688-703X; Papenbrock, Thomas/0000-0001-8733-2849 NR 34 TC 9 Z9 9 U1 0 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0954-3899 EI 1361-6471 J9 J PHYS G NUCL PARTIC JI J. Phys. G-Nucl. Part. Phys. PD AUG PY 2005 VL 31 IS 8 BP S1291 EP S1299 DI 10.1088/0954-3899/31/8/007 PG 9 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 957BO UT WOS:000231344500008 ER PT J AU Barrett, BR Dean, DJ Hjorth-Jensen, M Vary, JP AF Barrett, BR Dean, DJ Hjorth-Jensen, M Vary, JP TI Nuclear forces and the quantum many-body problem - Preface SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS LA English DT Editorial Material C1 Univ Arizona, Dept Phys, Tucson, AZ 85721 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Oslo, Ctr Math Applicat, N-0316 Oslo, Norway. Univ Oslo, Dept Phys, N-0316 Oslo, Norway. CERN, PH Div, CH-1211 Geneva, Switzerland. Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. RP Barrett, BR (reprint author), Univ Arizona, Dept Phys, POB 210081, Tucson, AZ 85721 USA. RI Hjorth-Jensen, Morten/B-1417-2008 NR 0 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0954-3899 J9 J PHYS G NUCL PARTIC JI J. Phys. G-Nucl. Part. Phys. PD AUG PY 2005 VL 31 IS 8 DI 10.1088/0954-3899/31/8/000 PG 4 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 957BO UT WOS:000231344500001 ER PT J AU Trines, RMGM Kamp, LPJ Schep, TJ Sluijter, FW Leemans, WP Esarey, EH AF Trines, RMGM Kamp, LPJ Schep, TJ Sluijter, FW Leemans, WP Esarey, EH TI On the effect of laser and plasma parameters on stimulated Raman scattering and fast-electron generation SO JOURNAL OF PLASMA PHYSICS LA English DT Article ID WAKE-FIELD ACCELERATION; CHIRPED OPTICAL PULSES; HIGH-INTENSITY LASERS; ELECTROMAGNETIC-WAVES; UNDERDENSE PLASMAS; NONLINEAR OPTICS; COMPRESSION; WAKEFIELDS; BACKWARD AB The effect of Raman instabilities on the production of fast electrons in laser-plasma interaction has been investigated for laser intensities well above the electron trapping threshold. The results of one-dimensional particle-in-cell Simulations show that in this regime the presence of Raman backscattering (RBS) hampers fast-electron production, and that its suppression increases the yield of high-energy electrons (> 15 MeV). Such suppression has been realized either through deletion of all backscattered radiation from the simulations or through direct stimulation of Raman forward scattering (RFS). An increased high-energy electron yield has been observed for both methods. In addition, the influence of various laser and plasma parameters on the production of highly energetic electrons has been investigated. Specifically, the effects of plasma density ramps, skews in the temporal envelopes of the laser pulses, and laser frequency chirp (both pulse-length preserving and bandwidth preserving) have been examined. For each parameter, its influence on the yield of hi h-energy electrons can be explained from the way it affects the balance between RBS and RFS excitation in laser-plasma interaction. C1 Eindhoven Univ Technol, Dept Appl Phys, NL-5600 MB Eindhoven, Netherlands. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Trines, RMGM (reprint author), Eindhoven Univ Technol, Dept Appl Phys, POB 513, NL-5600 MB Eindhoven, Netherlands. EM l.p.j.kamp@tue.nl OI Kamp, Leon/0000-0003-0626-3832 NR 47 TC 1 Z9 1 U1 1 U2 9 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH ST, NEW YORK, NY 10011-4211 USA SN 0022-3778 J9 J PLASMA PHYS JI J. Plasma Phys. PD AUG PY 2005 VL 71 BP 411 EP 433 DI 10.1017/S0022377804003320 PN 4 PG 23 WC Physics, Fluids & Plasmas SC Physics GA 960PG UT WOS:000231605000004 ER PT J AU Miyasaka, C Tittmann, BR AF Miyasaka, C Tittmann, BR TI Acoustic microscopy applied to ceramic pressure vessels and associated components SO JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME LA English DT Article ID SURFACE-WAVE; V(Z); STRESS; SIGNATURES; CRYSTALS; MODEL AB Alumina ceramic is being used extensively for external pressure vessels in naval applications. The material is also used in valves and other components, where reliability, immunity from corrosion, and high temperatures are required. This report presents a technique for the nondestructive evaluation of alumina ceramic components. The cracks were produced by CO2 laser radiation. Since there is a need for the detection of very fine cracks, scanning acoustic microscopy was found to be superior to optical methods for imaging surface and subsurface cracks. We address the issue of crack initiation with the use of postirradiation analysis. This article reports our results on the evaluation of the surface and interior cracks with optical, scanning laser scanning electron, and scanning acoustic microscopy. We present images of surface and subsurface microcracks generated at different power levels of a high power CO2 laser system. The spatial variation of the Rayleigh wave velocity is measured by the V(z) curve technique. These preliminary data suggest that, with some improvement, the V(z) technique may detect residual stress with high spatial resolution. C1 Penn State Univ, University Pk, PA 16801 USA. RP Idaho Natl Lab, Idaho Falls, ID 83401 USA. NR 37 TC 2 Z9 2 U1 2 U2 5 PU ASME PI NEW YORK PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA SN 0094-9930 EI 1528-8978 J9 J PRESS VESS-T ASME JI J. Press. Vessel Technol.-Trans. ASME PD AUG PY 2005 VL 127 IS 3 BP 214 EP 219 DI 10.1115/1.1990212 PG 6 WC Engineering, Mechanical SC Engineering GA 969VR UT WOS:000232264000002 ER PT J AU Zhao, XL Varma, VK Mei, G Ayhan, B Kwan, C AF Zhao, XL Varma, VK Mei, G Ayhan, B Kwan, C TI In-line nondestructive inspection of mechanical dents on pipelines with guided shear horizontal wave electromagnetic acoustic transducers SO JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME LA English DT Article AB Circumferential guided ultrasonic Shear Horizontal (SH) wave Electromagnetic Acoustic Transducer (EMAT) pairs mounted on a mobile fixture in a through-transmission mode were used for detection and characterization of mechanical dents on the outer surface of a pipe wall from inside the pipe. The dents were created on a 12 in. diameter standard seamless steel pipe by hydraulically pressing steel balls of various sizes into the pipe wall. n(1) mode SH wave was directed through and along the wall of the pipe. Multiple measurements were obtained both from the dents and front the no-flaw region of the pipe using the EMAT pair Dent features were extracted with a Principal Component Analysis (PCA) technique and classified into "cup " and "saucer" types using Discriminant Analysis (DA). The overall approach is able to detect and classify dents of depth 25% through wall or deeper which should meet the needs of the pipeline safely inspection community (U.S. Department of Transportation, Research and Special Program Administration). Preliminary dent depth estimation potential is also shown via an amplitude correlation approach. C1 Intelligent Automat Inc, Rockville, MD 20855 USA. Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA. RP Zhao, XL (reprint author), Intelligent Automat Inc, 15400 Calhoun Dr, Rockville, MD 20855 USA. EM xzhao@i-a-i.com RI 苏, 日亮/D-4386-2009 NR 13 TC 9 Z9 9 U1 0 U2 6 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0094-9930 J9 J PRESS VESS-T ASME JI J. Press. Vessel Technol.-Trans. ASME PD AUG PY 2005 VL 127 IS 3 BP 304 EP 309 DI 10.1115/1.1991879 PG 6 WC Engineering, Mechanical SC Engineering GA 969VR UT WOS:000232264000015 ER PT J AU Perry, DL English, GA Firestone, RB Molnar, GL Revay, Z AF Perry, DL English, GA Firestone, RB Molnar, GL Revay, Z TI Determination of contaminants in rare earth materials by prompt gamma activation analysis (PGAA) SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY LA English DT Article ID RESONANCE ENERGY-TRANSFER; FLUORESCENCE; SAMPLES; IONS AB Prompt gamma activation analysis (PGAA) has been used to detect and quantify impurities in the analyses of rare earth (RE) oxides. The analytical results are discussed with respect to the importance of having a thorough identification and understanding of contaminant elements in these compounds regarding the function of the materials in their various applications. Also, the importance of using PGAA to analyze materials in support of other physico-chemical studies of the materials is discussed, including the study of extremely low concentrations of ions - such as the rare earth ions themselves - in bulk material matrices. C1 EO Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Hungarian Acad Sci, Inst Isotopes & Surface Chem, Chem Res Ctr, H-1525 Budapest, Hungary. RP Perry, DL (reprint author), EO Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM dlperry@lbl.gov OI Firestone, Richard/0000-0003-3833-5546 NR 24 TC 1 Z9 1 U1 0 U2 2 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0236-5731 J9 J RADIOANAL NUCL CH JI J. Radioanal. Nucl. Chem. PD AUG PY 2005 VL 265 IS 2 BP 229 EP 233 DI 10.1007/s10967-005-0813-7 PG 5 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 948CD UT WOS:000230692700009 ER PT J AU Firestone, RB English, GA Reijonen, J Leung, KN Perry, DL Garabedian, G Bandong, B Revay, Z Molnar, GL AF Firestone, RB English, GA Reijonen, J Leung, KN Perry, DL Garabedian, G Bandong, B Revay, Z Molnar, GL TI Analysis of fissile materials by high-energy neutron-induced fission decay gamma-rays SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY LA English DT Article ID SPECTRUM CATALOG; PGAA AB Thermal neutrons from the Budapest Research Reactor and fast neutrons from the Berkeley Neutron Generator Facility have been used to analyze uranium. It has been shown that both prompt and delayed gamma-rays from neutron capture and fission product decay can be used to analyze uranium concentrations and U-235 enrichment. Detection of neutrons from the spontaneous fission of U-238 has also been demonstrated for uranium analysis. The observation of high-energy gamma-rays following the decay of short-lived fission products is a sensitive indication of fissile material, and the ratio of fission product gamma-ray intensities can uniquely determine the concentrations of fission isotopes. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Hungarian Acad Sci, Inst Isotopes & Surface Chem, Chem Res Ctr, H-1525 Budapest, Hungary. RP Firestone, RB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM rbf@lbl.gov OI Firestone, Richard/0000-0003-3833-5546 NR 14 TC 3 Z9 3 U1 2 U2 6 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0236-5731 J9 J RADIOANAL NUCL CH JI J. Radioanal. Nucl. Chem. PD AUG PY 2005 VL 265 IS 2 BP 241 EP 245 DI 10.1007/s10967-005-0815-5 PG 5 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 948CD UT WOS:000230692700011 ER PT J AU Gschneidner, KA AF Gschneidner, KA TI Magnetic cooling SO JOURNAL OF RARE EARTHS LA English DT Article ID MAGNETOCALORIC MATERIALS; REFRIGERATION C1 Iowa State Univ, Dept Mat Sci & Engn, Ames Lab, Ames, IA 50011 USA. RP Gschneidner, KA (reprint author), Iowa State Univ, Dept Mat Sci & Engn, Ames Lab, Ames, IA 50011 USA. EM cagey@ameslab.gov NR 11 TC 0 Z9 0 U1 0 U2 1 PU METALLURGICAL INDUSTRY PRESS PI BEIJING PA 2 XINJIEKOUWAI DAJIE, BEIJING 100088, PEOPLES R CHINA SN 1002-0721 J9 J RARE EARTH JI J. Rare Earths PD AUG PY 2005 VL 23 IS 4 BP I EP II PG 2 WC Chemistry, Applied SC Chemistry GA 966LI UT WOS:000232021000001 ER PT J AU Miller, WA Brown, E Livezey, RJ AF Miller, WA Brown, E Livezey, RJ TI Building-integrated photovoltaics for low-slope commercial roofs SO JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article; Proceedings Paper CT International Solar Energy Conference CY JUL 01-14, 2004 CL Portland, OR SP Amer Soc Mech Engineers DE photovoltaic; building energy; low-slope roof; offset-mounted PV; computer simulations AB A photovoltaic (PV) distributed energy resource (DER) was established to support the Tennessee Valley Authority's Green Power Switch program, which allows utility customers to purchase blocks of electricity generated by solar resources. The PV DER was also used to study the potential shading benefits of roof-mounted PV systems for commercial buildings. Test data derived by monitoring an offset-mounted PV array shading a built-up low-slope roof system shows that the annual savings per square foot of low-slope roof can be as high as $0.18 ($1.95 per square meter) in Phoenix, AZ. C1 Oak Ridge Natl Lab, Bldg Technol Ctr, Oak Ridge, TN 37831 USA. ORNL Intern, Gainesville, FL 32606 USA. RSOE RTA EMERGING Technol, Chattanooga, TN 37402 USA. RP Miller, WA (reprint author), Oak Ridge Natl Lab, Bldg Technol Ctr, Oak Ridge, TN 37831 USA. NR 12 TC 1 Z9 1 U1 1 U2 4 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0199-6231 J9 J SOL ENERG-T ASME JI J. Sol. Energy Eng. Trans.-ASME PD AUG PY 2005 VL 127 IS 3 BP 307 EP 313 DI 10.1115/1.1877514 PG 7 WC Energy & Fuels; Engineering, Mechanical SC Energy & Fuels; Engineering GA 958MM UT WOS:000231452400002 ER PT J AU Zalupski, PR Jensen, MP Herlinger, AW AF Zalupski, PR Jensen, MP Herlinger, AW TI Investigation of acid-base equilibria for symmetrically substituted P,P '-dialkyl partial esters of bisphosphonic acids SO JOURNAL OF SOLUTION CHEMISTRY LA English DT Article DE bisphosphonic acids; partial esters; acid dissociation constants; electrostatic effect; metal ion separations ID DIPHOSPHONIC ACIDS; DISSOCIATION-CONSTANTS; STABILITY-CONSTANTS; SOLVENT-EXTRACTION; METAL EXTRACTION; ION EXTRACTION; PRECONCENTRATION; SEPARATION; COMPLEXES; ROUTE AB Bisphosphonic acids are powerful metal chelating reagents with a wide spectrum of applications. A series of partial ester derivatives of bisphosphonic acids was synthesized in order to investigate the physico-chemical changes induced by partial protection of the acid groups. The acid dissociation constants K-1 and K-2 for a homologous series of short-chain aqueous-soluble dibasic bisphosphonic acids, i.e., the P,P'-diethyl methylene-, ethylene- and propylene-bisphosphonic acid partial esters, H2DEt[MBP], H2DEt[EBP] and H2DEt[PrBP], respectively, were determined by potentiometric titration and P-31 NMR spectrometry. All three diethyl esters are rather acidic with pK(1) < 1.2 and pK(2) < 2.2. The influence of the separation between the phosphonate groups on ligand acidity and successive pK(a) values is rationalized in terms of solvation, inductive and electrostatic effects. C1 Loyola Univ, Dept Chem, Chicago, IL 60626 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Zalupski, PR (reprint author), Loyola Univ, Dept Chem, 6525 N Sheridan Rd, Chicago, IL 60626 USA. EM aherlin@luc.edu RI Jensen, Mark/G-9131-2012 OI Jensen, Mark/0000-0003-4494-6693 NR 36 TC 1 Z9 1 U1 0 U2 6 PU SPRINGER/PLENUM PUBLISHERS PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0095-9782 J9 J SOLUTION CHEM JI J. Solut. Chem. PD AUG PY 2005 VL 34 IS 8 BP 869 EP 880 DI 10.1007/s10953-005-6244-9 PG 12 WC Chemistry, Physical SC Chemistry GA 956PE UT WOS:000231311500001 ER PT J AU Novascone, SR Weinberg, DM Anderson, MJ AF Novascone, SR Weinberg, DM Anderson, MJ TI Frequency shift of a rotating mass-imbalance immersed in an acoustic fluid SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article AB In this paper, we describe a physical mechanism that relates a measurable behavior of a rigid oscillator device to the physical properties of a surrounding acoustic medium. The device under consideration is a rotating mass imbalance within an enclosed shell that is immersed in an unbounded acoustic fluid. It is assumed that the rotating mass imbalance is driven by an electromagnetic motor excited by a given dc voltage. If nonlinearities are ignored, the steady-state operational frequency of such a device is determined by a balance between the applied electromagnetic and opposing frictional torque on the rotating mass imbalance. If nonlinearities are retained, it is shown that under certain circumstances, the surrounding acoustic medium exerts an additional time-averaged opposing torque on the rotating mass imbalance that reduces the operational frequency of the device. Consequently, the operational frequency of the device becomes linked to the physical properties of the surrounding medium. Analytical calculations showed that the dissipative impedance of an acoustic fluid caused the opposing torque. The shift in frequency is proportional to the dissipative impedance and the square of the rotating mass eccentricity, but inversely proportional the total mass of the device and the damping effect of the dc motor. (C) 2005 Acoustical Society of America. C1 Idaho Natl Engn Lab, EROB, Idaho Falls, ID 83415 USA. Univ Idaho, Dept Mech Engn, Moscow, ID 83844 USA. RP Novascone, SR (reprint author), Idaho Natl Engn Lab, EROB, MS 3760,2525 N Fremont Ave, Idaho Falls, ID 83415 USA. EM Stephen.Novascone@inl.gov RI Anderson, Michael/G-9584-2011 NR 12 TC 0 Z9 0 U1 0 U2 0 PU ACOUSTICAL SOC AMER AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD AUG PY 2005 VL 118 IS 2 BP 745 EP 750 DI 10.1121/1.1944607 PG 6 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA 955FJ UT WOS:000231210500023 ER PT J AU Gaffney, JS Marley, NA Cunningham, MM Kotamarthi, VR AF Gaffney, JS Marley, NA Cunningham, MM Kotamarthi, VR TI Beryllium-7 measurements in the Houston and Phoenix urban areas: An estiamation of upper atmospheric ozone contributions SO JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION LA English DT Article ID TROPOSPHERIC OZONE; LOWER STRATOSPHERE; BE-7; AEROSOLS; TRANSPORT; PB-210; AIR; ATLANTIC; HAIL; TIME AB Natural radionuclides have been proposed as a means of assessing the transport of ozone (O-3) and aerosols in the troposphere. Beryllium-7 (Be-7) is produced in the upper troposphere and lower stratosphere by the interaction of cosmogenic particles with atmospheric nitrogen and oxygen. Be-7 has a 53.29-day half-life (478 keV gamma) and is known to attach to fine particles in the atmosphere once it is formed. It has been suggested that O-3 from aloft can be transported into rural and urban regions during stratospheric-tropospheric folding events leading to increased background levels of O-3 at the surface. Be-7 can be used as a tracer of upper atmospheric air parcels and the O-3 associated with them. Aerosol samples with a 2.5-mu m cutoff were collected during 12-hr cycles (day/night) for a 30-day period at Deer Park, TX, near Houston, in August-September of 2000, and at Waddell; AZ, near Phoenix, in June July of 2001. A comparison of Be-7 levels with 12-hr O-3 averages and maxima shows little correlation. Comparison of nighttime and daytime O-3 levels indicate that during the day, when mixing is anticipated to be higher, the correlation of Be-7 with O-3 in Houston is approximately twice that observed at night. This is consistent with mixing and with the anticipated loss of O-3 by reaction with nitric oxide (NO) and dry deposition. At best, 30% of the O-3 variance can be explained by the correlation with Be-7 for Houston, less than that for Phoenix where no significant correlation was seen. This result is consistent with the intercept values obtained for Be-7 correlations with either O-3 24-hr averages or O-3 12-hr maxima and is also in the range of the low O-3 levels (25 ppb) observed at Deer Park during a tropical storm event where the O-3 is attributable primarily to background air masses. That is, maximum background O-3 level contributions from stratospheric sources aloft are estimated to be in the range of 15-30 ppb in the Houston, TX, and Phoenix, AZ, area, and levels above these are because of local tropospheric photochemical production. C1 Argonne Natl Lab, Environm Res Div, Argonne, IL 60439 USA. RP Gaffney, JS (reprint author), Argonne Natl Lab, Environm Res Div, 9700 S Cass Ave, Argonne, IL 60439 USA. EM gaffney@anl.gov NR 32 TC 0 Z9 1 U1 1 U2 4 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA SN 1096-2247 EI 2162-2906 J9 J AIR WASTE MANAGE JI J. Air Waste Manage. Assoc. PD AUG PY 2005 VL 55 IS 8 BP 1228 EP 1235 PG 8 WC Engineering, Environmental; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA 952DB UT WOS:000230981200017 PM 16187592 ER PT J AU Weyant, CM Faber, KT Almer, JD Guiheen, JV AF Weyant, CM Faber, KT Almer, JD Guiheen, JV TI Residual stress and microstructural evolution in tantalum oxide coatings on silicon nitride SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID SIO2 SCALE VOLATILITY; ELASTOPLASTIC ANALYSIS; COMBUSTION CONDITIONS; LAYERED MATERIALS; RECESSION; DELAMINATION; TEMPERATURE; OXIDATION; MECHANICS; CARBIDE AB Due to its coefficient of thermal expansion (CTE) and phase stability up to 1360 degrees C, tantalum oxide (Ta2O5) was identified and investigated as a candidate environmental barrier coating for silicon nitride-based ceramics. Ta2O5 coatings were plasma sprayed onto AS800, a silicon nitride ceramic from Honeywell International, and subjected to static and cyclic heat treatments up to 1200 degrees C in air. Cross-sections from coated and uncoated substrates were polished and etched to reveal the effect of heat treatments on microstructure and grain size. As-sprayed coatings contained vertical cracks that healed after thermal exposure. Significant grain growth that was observed in the coatings led to microcracking due to the anisotropic CTE of Ta2O5. High-energy X-ray diffraction was used to determine the effect of heat treatment on residual stress and phases. The uncoated substrates were found to have a surface compressive layer before and after thermal cycling. Coating stresses in the as-sprayed state were found to be tensile, but became compressive after heat treatment. The microcracking and buckling that occurred in the heat-treated coatings led to stress relaxation after long heat treatments, but ultimately would be detrimental to the function of the coating as an environmental barrier by affording open pathways for volatile species to reach the underlying ceramic. C1 Northwestern Univ, Robert R McCormick Sch Engn & Appl Sci, Dept Mat Sci & Engn, Evanston, IL 60208 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Honeywell Int, Morristown, NJ 07960 USA. RP Faber, KT (reprint author), Northwestern Univ, Robert R McCormick Sch Engn & Appl Sci, Dept Mat Sci & Engn, Evanston, IL 60208 USA. EM k-faber@northwestern.edu RI Faber, Katherine/B-6741-2009 NR 27 TC 12 Z9 12 U1 3 U2 18 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD AUG PY 2005 VL 88 IS 8 BP 2169 EP 2176 DI 10.1111/j.1551-2916.2005.00396.x PG 8 WC Materials Science, Ceramics SC Materials Science GA 950PR UT WOS:000230870000025 ER PT J AU Kruzic, JJ Cannon, RM Ritchie, RO AF Kruzic, JJ Cannon, RM Ritchie, RO TI Effects of moisture on grain-boundary strength, fracture, and fatigue properties of alumina SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID CRACK-TIP TOUGHNESS; POLYCRYSTALLINE ALUMINA; BRIDGING STRESSES; HIGH-TEMPERATURE; SILICON-NITRIDE; R-CURVES; CERAMIC/METAL COMPOSITES; OPENING DISPLACEMENT; RESISTANCE MECHANISM; MONOLITHIC ALUMINA AB The role of moisture in affecting both intrinsic and extrinsic aspects of the fracture and fatigue-crack growth resistance of a polycrystalline alumina (99.5% pure, 25 mu m grain size) has been examined in both moist and dry environments at ambient temperature. The intrinsic (crack-tip) toughness, deduced from measured crack-opening profiles, is found to be less than for a single crystal and is 30% lower (similar to 0.6 MPa center dot m(1/2)) in moist air versus in dry N-2, implying that the grain-boundary theoretical strength is higher in a dry environment. Despite this, in dry atmospheres, the R-curves (which derive from crack deflection and grain bridging) initially rose more steeply and nominal fatigue-crack growth thresholds for short crack sizes (20-60 mu m) were more than 1.3 MPa center dot m(1/2) higher. Owing to this quicker crack bridging development, strengths for natural flaws could be more than doubled in dry atmospheres, a difference that well exceeds the effect solely due to the intrinsic toughness change. After similar to 2 mm of crack growth, however, the R-curve and steady-state fatigue behavior appeared similar in both environments, although altering the atmosphere for such fatigue cracks in situ induced large, abrupt changes in transient growth rates. The environment influences the nature of the bridging zones, with uncracked-ligament bridges playing a larger role in dry atmospheres, while frictional bridges are predominant in moist air. Evidently, to achieve optimal toughness in bridging ceramics, the window for the requisite grain-boundary strength may be small; whereas weak boundaries are required to induce the necessary intergranular fracture, if too weak, shallower R-curves, less strengthening, and poorer fatigue resistance all follow. C1 Univ Calif Berkeley, Div Mat Sci, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Div Mat Sci, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM RORitchie@lbl.gov RI Ritchie, Robert/A-8066-2008; Kruzic, Jamie/M-3558-2014 OI Ritchie, Robert/0000-0002-0501-6998; Kruzic, Jamie/0000-0002-9695-1921 NR 79 TC 24 Z9 24 U1 2 U2 13 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0002-7820 EI 1551-2916 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD AUG PY 2005 VL 88 IS 8 BP 2236 EP 2245 DI 10.1111/j.1551-2916.2005.00434.x PG 10 WC Materials Science, Ceramics SC Materials Science GA 950PR UT WOS:000230870000035 ER PT J AU Norbeck, AD Monroe, ME Adkins, JN Anderson, KK Daly, DS Smith, RD AF Norbeck, AD Monroe, ME Adkins, JN Anderson, KK Daly, DS Smith, RD TI The utility of accurate mass and LC elution time information in the analysis of complex proteomes SO JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY LA English DT Article ID PROTEIN IDENTIFICATION; HIGH-THROUGHPUT; LIQUID-CHROMATOGRAPHY; YEAST PROTEOME; SPECTROMETRY; PREDICTION; TAGS; TECHNOLOGY; RETENTION; MIXTURES AB The combination of mass and normalized elution time (NET) of a peptide identified by liquid chromatography-mass spectrometry (LC-MS) measurements can serve as a unique signature for that peptide. However, the specificity of an LC-MS measurement depends upon the complexity of the proteome (i.e., the number of possible peptides) and the accuracy of the LC-MS measurements. In this work, theoretical tryptic digests of all predicted proteins from the genomes of three organisms of varying complexity were evaluated for specificity. Accuracy of the LC-MS measurement of mass-NET pairs (on a 0 to 1.0 NET scale) was described by bivariate normal sampling distributions centered on the peptide signatures. Measurement accuracy (i.e., mass and NET standard deviations of +/- 0.1, 1, 5, and 10 ppm, and +/- 0.01 and 0.05, respectively) was varied to evaluate improvements in process quality. The spatially localized confidence score, a conditional probability of peptide uniqueness, formed the basis for the peptide identification. Application of this approach to organisms with comparatively small proteomes, such as Deinococcus radiodurans, shows that modest mass and elution time accuracies are generally adequate for confidently identifying most peptides. For more complex proteomes, more accurate measurements are required. However, the study suggests that the majority of proteins for even the human proteome should be identifiable with reasonable confidence by using LC-MS measurements with mass accuracies within +/- 1 ppm and high efficiency separations having elution time measurements within +/- 0.01 NET. C1 Pacific NW Natl Lab, Div Biol Sci, Computat Sci & Math Div, Richland, WA 99352 USA. RP Smith, RD (reprint author), Pacific NW Natl Lab, Div Biol Sci, Computat Sci & Math Div, 3335 Q Ave,POB 999,MSIN-K8-98, Richland, WA 99352 USA. EM rds@pnl.gov RI Smith, Richard/J-3664-2012; Adkins, Joshua/B-9881-2013; OI Smith, Richard/0000-0002-2381-2349; Adkins, Joshua/0000-0003-0399-0700; Anderson, Kevin/0000-0001-5613-5893 FU NCRR NIH HHS [P41 RR018522, RR18522]; NIAID NIH HHS [N01AI40053, Y1-AI-4894-01] NR 32 TC 73 Z9 75 U1 2 U2 4 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 1044-0305 J9 J AM SOC MASS SPECTR JI J. Am. Soc. Mass Spectrom. PD AUG PY 2005 VL 16 IS 8 BP 1239 EP 1249 DI 10.1016/j.jasms.2005.05.009 PG 11 WC Chemistry, Analytical; Chemistry, Physical; Spectroscopy SC Chemistry; Spectroscopy GA 952BF UT WOS:000230975700005 PM 15979333 ER PT J AU Tabb, DL Thompson, MR Khalsa-Moyers, G VerBerkmoes, NC McDonald, WH AF Tabb, DL Thompson, MR Khalsa-Moyers, G VerBerkmoes, NC McDonald, WH TI MS2Grouper: Group assessment and synthetic replacement of duplicate proteomic tandem mass spectra SO JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY LA English DT Article ID PROTEIN IDENTIFICATION TECHNOLOGY; SHOTGUN IDENTIFICATION; GENOME SEQUENCE; LIBRARY SEARCH; SPECTROMETRY; SIMILARITY; ALGORITHM; PEPTIDES; STRATEGIES; COMPLEXES AB Shotgun proteomics experiments require the collection of thousands of tandem mass spectra; these sets of data will continue to grow as new instruments become available that can scan at even higher rates. Such data contain substantial amounts of redundancy with spectra from a particular peptide being acquired many times during a single LC-MS/MS experiment. In this article, we present MS2Grouper, an algorithm that detects spectral duplication, assesses groups of related spectra, and replaces these groups with synthetic representative spectra. Errors in detecting spectral similarity are corrected using a paraclique criterion-spectra are only assessed as groups if they are part of a clique of at least three completely interrelated spectra or are subsequently added to such cliques by being similar to all but one of the clique members. A greedy algorithm constructs a representative spectrum for each group by iteratively removing the tallest peaks from the spectral collection and matching to peaks in the other spectra. This strategy is shown to be effective in reducing spectral counts by up to 20% in LC-MS/MS datasets from protein standard mixtures and proteomes, reducing database search times without a concomitant reduction in identified peptides. C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. Univ Tennessee, Oak Ridge Natl Lab, Grad Sch, Oak Ridge, TN 37830 USA. RP McDonald, WH (reprint author), Oak Ridge Natl Lab, Div Chem Sci, POB 2008,MS-6131, Oak Ridge, TN 37831 USA. EM mcdonaldwh@ornl.gov RI McDonald, W. Hayes/B-4109-2016 OI McDonald, W. Hayes/0000-0002-3510-426X NR 27 TC 38 Z9 39 U1 0 U2 4 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 1044-0305 J9 J AM SOC MASS SPECTR JI J. Am. Soc. Mass Spectrom. PD AUG PY 2005 VL 16 IS 8 BP 1250 EP 1261 DI 10.1016/j.jasms.2005.04.010 PG 12 WC Chemistry, Analytical; Chemistry, Physical; Spectroscopy SC Chemistry; Spectroscopy GA 952BF UT WOS:000230975700006 PM 15979332 ER PT J AU Annamalai, H Sperber, KR AF Annamalai, H Sperber, KR TI Regional heat sources and the active and break phases of boreal summer intraseasonal (30-50 day) variability SO JOURNAL OF THE ATMOSPHERIC SCIENCES LA English DT Article ID MADDEN-JULIAN OSCILLATION; AIR-SEA INTERACTION; PLANETARY-SCALE CIRCULATIONS; OUTGOING LONGWAVE RADIATION; INTERANNUAL VARIABILITY; SURFACE TEMPERATURE; TROPICAL ATMOSPHERE; WESTERN PACIFIC; INDIAN-OCEAN; VERTICAL STRUCTURE AB The boreal summer intraseasonal variability (BSISV) associated with the 30-50-day mode is represented by the coexistence of three components: poleward propagation of convection over the Indian and tropical west Pacific longitudes and eastward propagation along the equator. The hypothesis that the three components influence each other has been investigated using observed outgoing longwave radiation (OLR), NCEP-NCAR reanalysis, and solutions from an idealized linear model. The null hypothesis is that the three components are mutually independent. Cyclostationary EOF (CsEOF) analysis is applied on filtered OLR to extract the life cycle of the BSISV. The dominant CsEOF mode is significantly tied to the observed spatial rainfall pattern associated with the active/break phases over the Indian subcontinent. The components of the heating patterns from CsEOF analysis serve as prescribed forcings for the dry version of the linear model. This allows one to investigate the possible roles that the regional heat sources and sinks play in driving the large-scale monsoon circulation at various stages of the BSISV life cycle. To understand the interactive nature between convection and circulation, the moist version of the model is forced with intraseasonal SST anomalies. The linear models reproduce the major features of the BSISV seen in the reanalysis. The linear model suggests three new findings: (i) The circulation anomalies that develop as a Rossby wave response to suppressed convection over the equatorial Indian Ocean associated with the previous break phase of the BSISV results in low-level convergence and tropospheric moisture enhancement over the equatorial western Indian Ocean and helps trigger the next active phase of the BSISV. (ii) The development of convection over the tropical west Pacific forces descent anomalies to the west. This, in conjunction with the weakened cross-equatorial flow due to suppressed convective anomalies over the equatorial Indian Ocean, reduces the tropospheric moisture over the Arabian Sea and promotes westerly wind anomalies that do not recurve over India. As a result the low-level cyclonic vorticity shifts from India to Southeast Asia and break conditions are initiated over India. (iii) The circulation anomalies forced by equatorial Indian Ocean convective anomalies significantly influence the active/break phases over the tropical west Pacific. The model solutions support the hypothesis that the three components of the BSISV influence each other but do not imply that such an influence is responsible for the space-time evolution of the BSISV. Further, the applicability of the model results to the observed system is constrained by the assumption that linear interactions are sufficient to address the BSISV and that air-sea interaction and transient forcing are excluded. C1 Univ Hawaii Manoa, Sch Ocean & Earth Sci & Technol, IPRC, Honolulu, HI 96822 USA. Lawrence Livermore Natl Lab, PCMDI, Livermore, CA USA. RP Univ Hawaii Manoa, Sch Ocean & Earth Sci & Technol, IPRC, 1680 E-W Rd, Honolulu, HI 96822 USA. EM hanna@hawaii.edu RI Sperber, Kenneth/H-2333-2012 NR 83 TC 90 Z9 92 U1 1 U2 8 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0022-4928 EI 1520-0469 J9 J ATMOS SCI JI J. Atmos. Sci. PD AUG PY 2005 VL 62 IS 8 BP 2726 EP 2748 DI 10.1175/JAS3504.1 PG 23 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 961OS UT WOS:000231672300006 ER PT J AU Liu, YG Daum, PH AF Liu, YG Daum, PH TI Parameterization of the autoconversion process. Part 1: Analytical formulation of the Kessler-type parameterizations - Reply SO JOURNAL OF THE ATMOSPHERIC SCIENCES LA English DT Editorial Material C1 Brookhaven Natl Lab, Div Atmospher Sci, Upton, NY 11973 USA. RP Liu, YG (reprint author), Brookhaven Natl Lab, Div Atmospher Sci, Bldg 815E,75 Rutherford Dr, Upton, NY 11973 USA. EM lyg@bnl.gov RI Liu, Yangang/H-6154-2011 NR 6 TC 3 Z9 3 U1 0 U2 1 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0022-4928 J9 J ATMOS SCI JI J. Atmos. Sci. PD AUG PY 2005 VL 62 IS 8 BP 3007 EP 3008 DI 10.1175/JAS3525.1 PG 2 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 961OS UT WOS:000231672300025 ER PT J AU Tan, H Liu, C Huang, Y Geubelle, PH AF Tan, H Liu, C Huang, Y Geubelle, PH TI The cohesive law for the particle/matrix interfaces in high explosives SO JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS LA English DT Article DE mechanical testing; microstructure; fracture; microcracking; inhomogeneous materials ID CONSISTENT MECHANICS METHOD; DIGITAL-IMAGE-CORRELATION; INTERSONIC CRACK-PROPAGATION; FIBER-REINFORCED COMPOSITES; POLYMER BONDED EXPLOSIVES; ELASTIC PROPERTIES; MICROMECHANICS MODELS; IMPERFECT INTERFACE; NONLINEAR INTERFACE; FILLED ELASTOMERS AB The debonding of particle/matrix interfaces has an important effect on the macroscopic behavior of composite materials. There are extensive analytical and numerical studies on interface debonding in composite materials based on cohesive zone models which assume a phenomenological relation between the normal (and shear) traction(s) and opening (and sliding) displacement(s) across the particle/matrix interface. However, there are little or no experiments to determine the cohesive law for particle/matrix interfaces in composite materials. In this paper, we develop a method to determine the cohesive law for particle/matrix interfaces in the high explosive PBX 9501. We use the digital image correlation technique to obtain the stress and displacement around a macroscopic crack tip in the modified compact tension experiment of PBX 9501. We use the extended Mori-Tanaka method (which accounts for the effect of interface debonding) and the equivalence of cohesive energy on the macroscale and microscale to link the macroscale compact tension experiment to the microscale cohesive law for particle/matrix interfaces. Such an approach enables us to quantitatively determine key parameters in the microscale cohesive law, namely the linear modulus, cohesive strength, and softening modulus of particle/matrix interfaces in the high explosive PBX 9501. The present study shows that Ferrante et al.'s [1982 Universal binding energy relations in metallic adhesion. In: J.M. Georges (Ed.), Microscopic Aspects of Adhesion and Lubrication, Elsevier, Amsterdam, pp. 19-30.] cohesive law, which is established primarily for bimetallic interfaces, is not suitable to the high explosive PBX 9501. (c) 2005 Elsevier Ltd. All rights reserved. C1 Univ Illinois, Dept Mech & Ind Engn, Urbana, IL 61801 USA. Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. Univ Illinois, Dept Aerosp Engn, Urbana, IL 61801 USA. RP Huang, Y (reprint author), Univ Illinois, Dept Mech & Ind Engn, Urbana, IL 61801 USA. EM huang9@uiuc.edu RI Huang, Yonggang/B-6998-2009 NR 67 TC 78 Z9 99 U1 6 U2 38 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0022-5096 J9 J MECH PHYS SOLIDS JI J. Mech. Phys. Solids PD AUG PY 2005 VL 53 IS 8 BP 1892 EP 1917 DI 10.1016/j.jmps.2005.01.009 PG 26 WC Materials Science, Multidisciplinary; Mechanics; Physics, Condensed Matter SC Materials Science; Mechanics; Physics GA 947AK UT WOS:000230614200008 ER PT J AU Poyneer, LA Veran, JP AF Poyneer, LA Veran, JP TI Optimal modal Fourier-transform wavefront control SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION LA English DT Article ID ASTRONOMICAL ADAPTIVE OPTICS; RECONSTRUCTION; PERFORMANCE; OPTIMIZATION; SYSTEMS AB Optimal modal Fourier-transform wavefront control combines the speed of Fourier-transform reconstruction (FTR) with real-time optimization of modal gains to form a fast, adaptive wavefront control scheme. Our modal basis is the real Fourier basis, which allows direct control of specific regions of the point-spread function. We formulate FTR as modal control and show how to measure custom filters. Because the Fourier basis is a tight frame, we can use it on a circular aperture for modal control even though it is not an orthonormal basis. The modal coefficients are available during reconstruction, greatly reducing computational overhead for gain optimization. Simulation results show significant improvements in performance in low-signal-to-noise-ratio situations compared with nonadaptive control. This scheme is computationally efficient enough to be implemented with off-the-shelf technology for a 2.5 kHz, 64 x 64 adaptive optics system. (C) 2005 Optical Society of America. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Herzberg Inst Astrophys, Victoria, BC V9E 2E7, Canada. RP Poyneer, LA (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94551 USA. EM poyneer1@llnl.gov; Jean-Pierre.Veran@nrc-cnrc.gc.ca NR 31 TC 58 Z9 58 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 1084-7529 J9 J OPT SOC AM A JI J. Opt. Soc. Am. A-Opt. Image Sci. Vis. PD AUG PY 2005 VL 22 IS 8 BP 1515 EP 1526 DI 10.1364/JOSAA.22.001515 PG 12 WC Optics SC Optics GA 950AN UT WOS:000230830100006 PM 16134846 ER PT J AU Tran, CQ Peele, AG Roberts, A Nugent, KA Paterson, D McNulty, I AF Tran, CQ Peele, AG Roberts, A Nugent, KA Paterson, D McNulty, I TI X-ray imaging: a generalized approach using phase-space tomography SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION LA English DT Article ID COHERENCE; RADIATION AB We discuss the role of coherence in x-ray imaging and consider how phase-space tomography can be used to extract information about partial coherence. We describe the application of phase-space tomography to x-ray imaging and recover the spatial coherence properties of a one-dimensional soft (1.5 keV) x-ray beam from a synchrotron undulator source. We present phase-space information from a Young's experiment and observe.: negative regions in the quasi-probability distribution. We show that, given knowledge of the coherence of the beam, we can use partially coherent diffraction data to recover fully coherent information, and we present some simple experimental demonstrations of this capability. (C) 2005 Optical Society of America. C1 Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Tran, CQ (reprint author), Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia. RI Roberts, Ann/C-3418-2011; Nugent, Keith/J-2699-2012; Tran, Chanh/M-7868-2015; Nugent, Keith/I-4154-2016 OI Roberts, Ann/0000-0003-4295-9730; Nugent, Keith/0000-0003-1522-8991; Nugent, Keith/0000-0002-4281-3478 NR 21 TC 16 Z9 16 U1 0 U2 5 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 1084-7529 J9 J OPT SOC AM A JI J. Opt. Soc. Am. A-Opt. Image Sci. Vis. PD AUG PY 2005 VL 22 IS 8 BP 1691 EP 1700 DI 10.1364/JOSAA.22.001691 PG 10 WC Optics SC Optics GA 950AN UT WOS:000230830100028 PM 16134868 ER PT J AU Gruszkiewicz, MS Simonson, JM Burchell, TD Cole, DR AF Gruszkiewicz, MS Simonson, JM Burchell, TD Cole, DR TI Water adsorption and desorption on microporous solids at elevated temperature SO JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY LA English DT Article; Proceedings Paper CT 3rd International Symposium on New Frontiers of Thermal Studies of Materials CY NOV 28-30, 2004 CL Univ Tsukuba, Univ Hall, Tsukuba, JAPAN SP JSCTA, Univ Tsukuba, Grad Sch Pure & Appl Sci, Soc Promot Calorimetry & Thermal Anal, Ibaraki, Sci & Technol Promot Fdn HO Univ Tsukuba, Univ Hall DE adsorption; carbon fiber; gravimetric; high-temperature; pillared clay; porous glass; water; zeolite ID SORPTION; ZEOLITES; SYSTEMS AB An accurate gravimetric method was used to explore water adsorption/desorption isotherms between 105 and to 250 degrees C for a number of synthetic and natural porous solids including controlled pore glass, activated carbon fiber monoliths, natural zeolites, pillared clay, and geothermal reservoir rocks. The main goal of this work was to evaluate water adsorption results, in particular temperature dependence of hysteresis, for relatively uniform, nano-structured solids, in the context of other state-of-the-art experimental and modeling methods including nitrogen adsorption, spectroscopy, neutron scattering, and molecular simulation. Since no single method is able to provide a complete characterization of porous materials, a combination of approaches is needed to achieve progress in understanding the fluid-solid interactions on the way to developing a predictive capability. C1 Oak Ridge Natl Lab, Div Chem Sci, Aqueous Chem & Geochem Grp, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Gruszkiewicz, MS (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Aqueous Chem & Geochem Grp, Oak Ridge, TN 37831 USA. EM gruszkiewicz@ornl.gov RI Gruszkiewicz, Miroslaw/L-2389-2016; Burchell, Tim/E-6566-2017 OI Gruszkiewicz, Miroslaw/0000-0002-6551-6724; Burchell, Tim/0000-0003-1436-1192 NR 20 TC 9 Z9 9 U1 1 U2 11 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 1388-6150 J9 J THERM ANAL CALORIM JI J. Therm. Anal. Calorim. PD AUG PY 2005 VL 81 IS 3 BP 609 EP 615 DI 10.1007/s10973-005-0832-1 PG 7 WC Thermodynamics; Chemistry, Analytical; Chemistry, Physical SC Thermodynamics; Chemistry GA 962VG UT WOS:000231760500021 ER PT J AU Phillips, NE Fisher, RA AF Phillips, NE Fisher, RA TI Superconducting-state energy gap parameters from specific heat measurements - MgB2 and Na0.3CoO2 center dot 1.3H(2)O SO JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY LA English DT Article; Proceedings Paper CT 3rd International Symposium on New Frontiers of Thermal Studies of Materials CY NOV 28-30, 2004 CL Univ Tsukuba, Univ Hall, Tsukuba, JAPAN SP JSCTA, Univ Tsukuba, Grad Sch Pure & Appl Sci, Soc Promot Calorimetry & Thermal Anal, Ibaraki, Sci & Technol Promot Fdn HO Univ Tsukuba, Univ Hall DE MgB2; Na0.3CoO2 center dot 1.3H(2)O; specific heat; superconductors ID OVERLAPPING BANDS; CAPACITY; BORON; MODEL AB Specific heat data and their relation to the form of the energy gap are reviewed for Al, HfV2, and two recently discovered superconductors, MgB2 and Na(0.3)CoO(2)center dot 1.3H(2)O. The data for Al and HfV2 exemplify the specific heat of, respectively, weak- and strong-coupled BCS superconductors with isotropic energy gaps. MgB2 is also known to be a BCS superconductor, but the specific heat deviates from BCS behavior in a way that shows the presence of two distinctly different energy gaps and characteristics of both weak and strong coupling. The heat capacity of Na(0.3)CoO(2)center dot 1.3H(2)O is strongly sample dependent, but suggests that it is another two-gap, possibly 'unconventional' superconductor. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Phillips, NE (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM nephill@cchem.berkeley.edu NR 39 TC 3 Z9 3 U1 0 U2 1 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 1388-6150 J9 J THERM ANAL CALORIM JI J. Therm. Anal. Calorim. PD AUG PY 2005 VL 81 IS 3 BP 631 EP 635 DI 10.1007/s10973-005-0835-y PG 5 WC Thermodynamics; Chemistry, Analytical; Chemistry, Physical SC Thermodynamics; Chemistry GA 962VG UT WOS:000231760500024 ER PT J AU Davenport, MP Zhang, L Bagchi, A Fridman, A Fu, TM Schleif, W Shiver, JW Ribeiro, RM Perelson, AS AF Davenport, MP Zhang, L Bagchi, A Fridman, A Fu, TM Schleif, W Shiver, JW Ribeiro, RM Perelson, AS TI High-potency human immunodeficiency virus vaccination leads to delayed and reduced CD8(+) T-cell expansion but improved virus control SO JOURNAL OF VIROLOGY LA English DT Article ID AIDS; INFECTION; KINETICS; LYMPHOCYTES; PREVENTION; CHALLENGE; ESCAPE; MEMORY AB CD8(+) T lymphocytes are thought to play an important role in the control of acute and chronic human immunodeficiency virus infections. However, there is a significant delay between infection and the first observed increase in virus-specific CD8(+) T-cell numbers. Prior to this time, viral kinetics are not significantly different between controls and vaccinees. Surprisingly, higher initial virus-specific CD8(+) T-cell numbers lead to a longer delay prior to initial CD8(+) T-cell expansion, and slower CD8(+) T-cell increases. Nevertheless, higher initial CD8(+) T-cell numbers were associated with reduced peak and chronic viral loads and reduced CD4(+) T-cell depletion. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ New S Wales, Prince Wales Hosp, Dept Haematol, Sydney, NSW 2052, Australia. Univ New S Wales, Ctr Vasc Res, Sydney, NSW 2052, Australia. Merck Res Labs, W Point, PA 19486 USA. RP Perelson, AS (reprint author), Los Alamos Natl Lab, MS K710, Los Alamos, NM 87545 USA. EM asp@lanl.gov FU NCRR NIH HHS [R01 RR006555, RR06555]; NIAID NIH HHS [AI28433, R01 AI028433, R37 AI028433] NR 12 TC 24 Z9 24 U1 0 U2 0 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0022-538X J9 J VIROL JI J. Virol. PD AUG PY 2005 VL 79 IS 15 BP 10059 EP 10062 DI 10.1128/JVI.79.15.10059-10062.2005 PG 4 WC Virology SC Virology GA 946MC UT WOS:000230575300067 PM 16014966 ER PT J AU Frahm, N Adams, S Kiepiela, P Linde, CH Hewitt, HS Lichterfeld, M Sango, K Brown, NV Pae, E Wurcel, AG Altfeld, M Feeney, ME Allen, TM Roach, T St John, MA Daar, ES Rosenberg, E Korber, B Marincola, F Walker, BD Goulder, PJR Brander, C AF Frahm, N Adams, S Kiepiela, P Linde, CH Hewitt, HS Lichterfeld, M Sango, K Brown, NV Pae, E Wurcel, AG Altfeld, M Feeney, ME Allen, TM Roach, T St John, MA Daar, ES Rosenberg, E Korber, B Marincola, F Walker, BD Goulder, PJR Brander, C TI HLA-B63 presents HLA-B57/B58-restricted cytotoxic T-lymphocyte epitopes and is associated with low human immunodeficiency virus load SO JOURNAL OF VIROLOGY LA English DT Article ID MAJOR HISTOCOMPATIBILITY COMPLEX; HIV-1 INFECTION; HLA-B; TYPE-1 INFECTION; ESCAPE MUTATION; POLYMORPHISM; SPECIFICITY; REVERSION; VIREMIA; AIDS AB Several HLA class I alleles have been associated with slow human immunodeficiency virus (HIV) disease progression, supporting the important role HLA class I-restricted cytotoxic T lymphocytes (CTL) play in controlling HIV infection. HLA-B63, the serological marker for the closely related HLA-B*1516 and HLA-B*1517 alleles, shares the epitope binding motif of HLA-B57 and HLA-B58, two alleles that have been associated with slow HIV disease progression. We investigated whether HIV-infected individuals who express HLA-B63 generate CTL responses that are comparable in breadth and specificity to those of HLA-B57/58-positive subjects and whether HLA-B63-positive individuals would also present with lower viral set points than the general population. The data show that HLA-B63-positive individuals indeed mounted responses to previously identified HLA-B57-restricted epitopes as well as towards novel, HLA-B63-restricted CTL targets that, in turn, can be presented by HLA-B57 and HLA-B58. HLA-B63-positive subjects generated these responses early in acute HIV infection and were able to control HIV replication in the absence of antiretroviral treatment with a median viral load of 3,280 RNA copies/ml. The data support an important role of the presented epitope in mediating relative control of HIV replication and help to better define immune correlates of controlled HIV infection. C1 Massachusetts Gen Hosp, Partners AIDS Res Ctr, Charlestown, MA 02129 USA. NIH, Ctr Clin, HLA Typing Lab, Bethesda, MD 20892 USA. Univ Natal, UHIV Pathogenesis Program, ZA-4001 Durban, South Africa. Fenway Community Hlth Ctr, Boston, MA 02115 USA. Lemuel Shattuck Hosp, Jamaica Plain, MA 02130 USA. Queen Elizabeth Hosp, Bridgetown, Barbados. Harbor UCLA Med Ctr, Los Angeles Biomed Res Inst, Torrance, CA 90502 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Santa Fe Inst, Santa Fe, NM 87501 USA. RP Brander, C (reprint author), AIDS Res Ctr, 5th Floor,MGH E,5214,149 13th St, Charlestown, MA 02129 USA. EM cbrander@partners.org RI Allen, Todd/F-5473-2011; OI Brander, Christian/0000-0002-0548-5778; Korber, Bette/0000-0002-2026-5757 FU NIAID NIH HHS [AI-067077, AI-043638, N01-AI-15422, R01 AI067077, U01 AI043638] NR 34 TC 57 Z9 57 U1 1 U2 2 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0022-538X J9 J VIROL JI J. Virol. PD AUG PY 2005 VL 79 IS 16 BP 10218 EP 10225 DI 10.1128/JVI.79.16.10218-10225.2005 PG 8 WC Virology SC Virology GA 950UX UT WOS:000230884700013 PM 16051815 ER PT J AU Cohen, S Dovrat, S Sarid, R Huberman, E Salzberg, S AF Cohen, S Dovrat, S Sarid, R Huberman, E Salzberg, S TI JAK-STAT signaling involved in phorbol 12-myristate 13-acetate- and dimethyl sulfoxide-induced 2 '-5 ' oligoadenylate synthetase expression in human HL-60 leukemia cells SO LEUKEMIA RESEARCH LA English DT Article DE HL-60; interferon-stimulated gene factor complex; interferon stimulated response element; JAK/STAT signaling; 2 '-5 ' oligoadenylate synthetase; DMSO; PMA; protein kinase C; STAT1; STAT2; differentiation ID PROTEIN-KINASE-C; CYTOKINE RECEPTOR SUPERFAMILY; GENE-EXPRESSION; TERMINAL DIFFERENTIATION; GROWTH ARREST; INDUCTION; PHOSPHORYLATION; INTERFERONS; ACTIVATION; INHIBITOR AB The JAK-STAT signal transduction cascade participates in various cellular processes, including immune response, cell replication, differentiation and oncogenesis. Here, we report that this cascade is induced in two human myeloid HL-60 leukemia cell variants by the granulocyte differentiation inducer dimethyl sulfoxide (DMSO) and macrophage differentiation inducer phorbol 12-myristate 13-acetate (PMA). DMSO and PMA also induced the expression and catalytic activity of 2'-5' oligoadenylate synthetase (2-5A synthetase), a known interferon (IFN) inducible enzyme. The HL-60 cell variants included HL-205, which is susceptible to DMSO- and PMA-induced differentiation, and HIL-525, which is susceptible to DMSO- but not to PMA-induced differentiation. Treatment of HL-205 and HL-525 cells with DMSO and HL-205 cells with PMA-induced JAK1 phosphorylation, JAK1/STAT1 association, formation of STAT1-STAT2 heterodimers, and the binding of the active IFN stimulating growth factor 3 (ISGF3) to the IFN-stimulated response element (ISRE) fragment isolated from the 2-5A synthetase promoter. These events were either reduced or absent in the resistant HL-525 cells treated with PMA. Taken together, our data implicate the above signaling cascade in DMSO- and PMA-induced 2-5A synthetase expression and catalytic activity in the HL-60 cell system. (c) 2005 Elsevier Ltd. All rights reserved. C1 Bar Ilan Univ, Fac Life Sci, IL-52900 Ramat Gan, Israel. Argonne Natl Lab, Biochip Technol Ctr, Argonne, IL 60439 USA. RP Sarid, R (reprint author), Bar Ilan Univ, Fac Life Sci, IL-52900 Ramat Gan, Israel. EM saridr@mail.biu.ac.il OI cohen, shenhav/0000-0001-8307-466X FU NCI NIH HHS [CA80826] NR 33 TC 6 Z9 6 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0145-2126 J9 LEUKEMIA RES JI Leuk. Res. PD AUG PY 2005 VL 29 IS 8 BP 923 EP 931 DI 10.1016/j.leukres.2005.01.015 PG 9 WC Oncology; Hematology SC Oncology; Hematology GA 943QT UT WOS:000230369800008 PM 15978943 ER PT J AU Burton, H AF Burton, H TI The curies: A biography of the most controversial family in science. SO LIBRARY JOURNAL LA English DT Book Review C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Burton, H (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU BOWKER MAGAZINE GROUP CAHNERS MAGAZINE DIVISION PI NEW YORK PA 249 W 17TH ST, NEW YORK, NY 10011 USA SN 0363-0277 J9 LIBR J JI Libr. J. PD AUG PY 2005 VL 130 IS 13 BP 117 EP 117 PG 1 WC Information Science & Library Science SC Information Science & Library Science GA 956KF UT WOS:000231297900385 ER PT J AU Boman, EG Chen, D Parekh, O Toledo, S AF Boman, EG Chen, D Parekh, O Toledo, S TI On factor width and symmetric H-matrices SO LINEAR ALGEBRA AND ITS APPLICATIONS LA English DT Article DE combinatorial matrix theory; H-matrix; generalized diagonally dominant; factor width ID DIAGONALLY DOMINANT MATRICES C1 Sandia Natl Labs, Dept Discrete Algorithms & Math, Albuquerque, NM 87185 USA. Tel Aviv Univ, Sch Comp Sci, IL-69978 Tel Aviv, Israel. Emory Univ, Dept Math & Comp Sci, Atlanta, GA 30322 USA. RP Boman, EG (reprint author), Sandia Natl Labs, Dept Discrete Algorithms & Math, POB 5800, Albuquerque, NM 87185 USA. EM egboman@sandia.gov; mycroft@tau.ac.il; ojas@mathcs.emory.edu; stoledo@tau.ac.il NR 7 TC 9 Z9 11 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0024-3795 J9 LINEAR ALGEBRA APPL JI Linear Alg. Appl. PD AUG 1 PY 2005 VL 405 BP 239 EP 248 DI 10.1016/j.laa.2005.03.029 PG 10 WC Mathematics, Applied; Mathematics SC Mathematics GA 946NC UT WOS:000230578000016 ER PT J AU Martin, RW Jachmann, RC Sakellariou, D Nielsen, UG Pines, A AF Martin, RW Jachmann, RC Sakellariou, D Nielsen, UG Pines, A TI High-resolution nuclear magnetic resonance spectroscopy of biological tissues using projected magic angle spinning SO MAGNETIC RESONANCE IN MEDICINE LA English DT Article DE nuclear magnetic resonance; magnetic susceptibility broadening; rotating solids; biological tissue; switched angle spinning ID H-1-NMR SPECTROSCOPY; NMR-SPECTRA; CHEMICAL-SHIFT; HUMAN PROSTATE; RAT-LIVER; SAMPLES; SOLIDS; MUSCLE; ROTATION; FIELD AB High-resolution NMR spectra of materials subject to anisotropic broadening are usually obtained by rotating the sample about the magic angle, which is 54.7 degrees to the static magnetic field. In projected magic angle spinning (p-MAS), the sample is spun about two angles, neither of which is the magic angle. This provides a method of obtaining isotropic spectra while spinning at shallow angles. The p-MAS experiment may be used in situations where spinning the sample at the magic angle is not possible due to geometric or other constraints, allowing the choice of spinning angle to be determined by factors such as the shape of the sample, rather than by the spin physics. The application of this technique to bovine tissue samples is demonstrated as a proof of principle for future biological or medical applications. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Ernest Orlando Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA USA. RP Pines, A (reprint author), Univ Calif Berkeley, Dept Chem, D64 Hildebrand Hall, Berkeley, CA 94720 USA. EM pines@berkeley.edu RI Sakellariou, Dimitrios/F-2846-2010; OI Sakellariou, Dimitrios/0000-0001-7424-5543; Nielsen, Ulla Gro/0000-0002-2336-3061 NR 28 TC 3 Z9 4 U1 0 U2 3 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0740-3194 J9 MAGNET RESON MED JI Magn. Reson. Med. PD AUG PY 2005 VL 54 IS 2 BP 253 EP 257 DI 10.1002/mrm.20585 PG 5 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 949DS UT WOS:000230765700001 PM 16032677 ER PT J AU Culiat, CT Klebig, ML Liu, ZW Monroe, H Stanford, B Desai, J Tandan, S Hughes, L Kerley, MK Carpenter, DA Johnson, DK Rinchik, EM Li, QB AF Culiat, CT Klebig, ML Liu, ZW Monroe, H Stanford, B Desai, J Tandan, S Hughes, L Kerley, MK Carpenter, DA Johnson, DK Rinchik, EM Li, QB TI Identification of mutations from phenotype-driven ENU mutagenesis in mouse Chromosome 7 SO MAMMALIAN GENOME LA English DT Article ID EMBRYONIC STEM-CELLS; ETHYL-N-NITROSOUREA; LACTATE-DEHYDROGENASE; CHEMICAL MUTAGENESIS; GENE-FUNCTION; DNA-SEQUENCE; GENOME-WIDE; MOUSE; MICE; MODELS AB We have used the new high-throughput mutation-scanning technique temperature-gradient capillary electrophoresis (TGCE) for the identification of point mutations induced by N-ethyl-N-nitrosourea (ENU) in the mouse genome. TGCE detects the presence of heteroduplex molecules formed between a wild-type gene segment and the corresponding homologous segment containing an induced mutation or a naturally occurring single nucleotide polymorphism (SNP). Partially denatured heteroduplex molecules are resolved from homoduplexes by virtue of their differential mobilities during capillary electrophoresis conducted in a finely controlled temperature gradient. Simultaneous heteroduplex analysis of 96 amplicons ranging from 150 to 600 by in size is achieved in approximately 45 min without the need for predetermining the melting profile of each fragment. Initially, we exploited known mouse mutations to develop TGCE protocols for analyzing unpurified PCR samples amplified from crude tail-DNA preparations. TGCE was then applied to the rapid identification of three new ENU-induced mutations recovered from regional mutagenesis screens of a segment of mouse Chromosome 7. Enzyme assays and quantitative reverse transcription-PCR (qRT-PCR) methods validated these new mutations. Our data demonstrate that rapid mutation scanning with TGCE, followed by sequence verification only of detected positives, is an efficient approach to the identification of point mutations in the mouse genome. C1 Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Biochem Cellular & Mol Biol, Knoxville, TN 37996 USA. SpectruMediz LLC, State Coll, PA 16803 USA. Univ Tennessee, Oak Ridge Natl Lab, Grad Sch Genome Sci & Technol, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Associated Coll Mid W Oak Ridge Sci Semster, Great Lakes Coll Assoc, Oak Ridge, TN 37831 USA. RP Culiat, CT (reprint author), Oak Ridge Natl Lab, Div Life Sci, POB 2008, Oak Ridge, TN 37831 USA. EM culiatct@ornl.gov NR 37 TC 5 Z9 5 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0938-8990 J9 MAMM GENOME JI Mamm. Genome PD AUG PY 2005 VL 16 IS 8 BP 555 EP 566 DI 10.1007/s00335-005-0032-0 PG 12 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity GA 963WR UT WOS:000231837400001 PM 16180137 ER PT J AU De Felici, M Felici, R del Rio, MS Ferrero, C Bacarian, T Dilmanian, FA AF De Felici, M Felici, R del Rio, MS Ferrero, C Bacarian, T Dilmanian, FA TI Dose distribution from x-ray microbeam arrays applied to radiation therapy: An EGS4 Monte Carlo study SO MEDICAL PHYSICS LA English DT Article DE Monte Carlo simulation; photon-electron transport; EGS4; x-ray microdosimetry; microbeam radiation therapy ID MOSFET DOSIMETRY; SYNCHROTRON-WIGGLER; MICROPLANAR BEAM; CODE; BRAIN AB We present EGS4 Monte Carlo calculations of the spatial distribution of the dose deposited by a single x-ray pencil beam, a planar microbeam, and an array of parallel planar microbeams as used in radiation therapy research. The profiles of the absorbed dose distribution in a phantom, including the peak-to-valley ratio of the dose distribution from microbeam arrays, were calculated. at micrometer resolution. We determined the dependence of the findings on the main parameters of photon and electron transport. The results illustrate the dependence of the electron range and the deposited in-beam dose on the cut-off energy, of the electron transport, as well as the effects on the dose profiles of the beam energy, the array size, and the beam spacing. The effect of beam polarization also was studied for a single pencil beam and for an array of parallel planar microbeams. The results show that although the polarization effect on the dose distribution from a 3 cm X 3 cm microbeam array inside a water phantom is large enough to be measured at the outer side of the array (16% difference of the deposited dose for x-ray beams of 200 keV), it is not detectable at the array's center, thus being irrelevant for the radiation therapy purposes. Finally we show that to properly compare the dose profiles determined with a metal oxide semiconductor field emission transistor detector with the computational method predictions, it is important to simulate adequately the size and the material of the device's Si active element. (c) 2005 American Association of Physicists in Medicine. C1 INFM, OGG, ESRF, F-38043 Grenoble, France. European Synchrotron Radiat Facil, F-38043 Grenoble, France. Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. RP De Felici, M (reprint author), INFM, OGG, ESRF, BP220, F-38043 Grenoble, France. EM defelici@esrf.fr NR 31 TC 33 Z9 33 U1 0 U2 5 PU AMER ASSOC PHYSICISTS MEDICINE AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 0094-2405 J9 MED PHYS JI Med. Phys. PD AUG PY 2005 VL 32 IS 8 BP 2455 EP 2463 DI 10.1118/1.1951043 PG 9 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 958VM UT WOS:000231476300004 PM 16193774 ER PT J AU Williams, PT Pate, RR AF Williams, PT Pate, RR TI Cross-sectional relationships of exercise and age to adiposity in 60,617 male runners SO MEDICINE AND SCIENCE IN SPORTS AND EXERCISE LA English DT Article DE exercise; running; aging; vigorous activity; body mass index; regional adiposity; waist circumference; population studies ID DISEASE RISK-FACTORS; INDUCED WEIGHT-LOSS; PHYSICAL-ACTIVITY; OVERWEIGHT MEN; BODY-WEIGHT; HEART-DISEASE; NATIONAL COHORT; ENERGY-INTAKE; WOMEN; OBESITY AB Introduction/Purpose: To assess in men whether exercise affects the estimated age-related increase in adiposity, and contrariwise, whether age affects the estimated exercise-related decrease in adiposity. Methods: Cross-sectional analyses of 64,911 male runners who provided data on their body mass index (97.6%) and waist circumference (91.1%). Results: Between 18 and 55 yr old, the decline in BMI with weekly distance run (slope +/- SE) was significantly greater in men 25-55 yr old than in younger men (slope +/- SE: -0.036 +/- 0.001 vs -0.020 +/- 0.002 kg(.)m(-2) per km(.)wk(-1)). Declines in waist circumference with distance were also significantly greater in older than younger men (P < 10(-9)), that is, the slopes decreased progressively from -0.035 +/- 0.004 cm per km(.)wk(-1) in 18- to 25-yr-old men to -0.097 +/- 0.003 cm per km(.)wk(-1) in 50- to 55-yr-old men). Increases in BMI with age were greater for men who ran under 16 km.wk-1 than for relatively longer distance runners. Waist circumference increased with age at all running distances, but the increase diminished by running further (0.259 +/- 0.015 cm(.)yr(-1) if running < 8 km-wk(-1) and 0.154 +/- 0.003 cm(.)yr(-1) for > 16 km.wk-1). In men 50-85 yr old, BMI declined -0.038 +/- 0.001 kg.m(-2) per km(.)wk(-1) run when adjusted for age and declined -0.054 +/- 0.003 kg.m(-2) (increased 0.021 +/- 0.007 cm) per year of age when adjusted for running distance. Their waist circumference declined -0.096 +/- 0.002 cm per km(.)wk(-1) run when adjusted for age and increased 0.021 +/- 0.007 cm per year of age when adjusted for running distance. Conclusions: These data suggest that age and vigorous exercise interact with each other in affecting men's adiposity and are consistent with the proposition that vigorous physical activity must increase with age to prevent middle-age weight gain. C1 Lawrence Berkeley Lab, Div Life Sci, Donner Lab, Berkeley, CA 94720 USA. Univ S Carolina, Arnold Sch Publ Hlth, Dept Exercise Sci, Columbia, SC USA. RP Williams, PT (reprint author), Lawrence Berkeley Lab, Div Life Sci, Donner Lab, Berkeley, CA 94720 USA. EM ptwilliams@lbl.gov FU NHLBI NIH HHS [HL-45652, HL-72110]; NIDDK NIH HHS [DK066738] NR 43 TC 25 Z9 27 U1 1 U2 5 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0195-9131 J9 MED SCI SPORT EXER JI Med. Sci. Sports Exerc. PD AUG PY 2005 VL 37 IS 8 BP 1329 EP 1337 DI 10.1249/01.mss.0000174894.05236.45 PG 9 WC Sport Sciences SC Sport Sciences GA 958VJ UT WOS:000231476000012 PM 16118580 ER PT J AU Jin, YM Wang, YU Khachaturyan, AG Krenn, CR Schwartz, AJ AF Jin, YM Wang, YU Khachaturyan, AG Krenn, CR Schwartz, AJ TI Crystallography of the delta -> alpha martensitic transformation in plutonium alloys SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article ID DELTA-PHASE PLUTONIUM; PU-GA ALLOYS; ALPHA-PLUTONIUM; DELTA->ALPHA; DEFORMATION; MODEL; AUCD AB A new stress-accommodating crystallographic mechanism of the delta -> alpha martensitic transformation in plutonium alloys is proposed. According to this mechanism, an orientation variant of the alpha phase is produced by a combination of a homogeneous strain and shuffling of the alternating close-packed (111)delta planes. It is shown that the formation of stable transformation-induced twins whose twin-plane orientations and twin-shear directions do not depend on the small variations of the crystal-lattice parameters is the preferred stress-accommodating mode. Only these stable twins have dislocation-free twin boundaries, while the twin boundaries of all others are decorated by an ultradense distribution of partial dislocations. The theory predicts a crystal-lattice rearrangement mechanism involving the (205)(alpha) ((011)(delta)) stable twins. The corresponding invariant plane-strain (IPS) solutions, with special emphasis on the two simplest shuffling modes (the single and double elementary modes), are presented and compared with the existing experimental observations. It is shown that the habit-plane orientation is highly sensitive to the input values of the crystal-lattice parameters and, especially, to the accuracy of the measured volume change in the delta -> alpha transformation. An analysis of these effects on the habit-plane orientation and orientation relations is also presented. C1 Rutgers State Univ, Ceram & Mat Engn Dept, Piscataway, NJ 08854 USA. Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA. Lawrence Livermore Natl Lab, Directorate Chem & Mat Sci, Livermore, CA 94551 USA. RP Jin, YM (reprint author), Rutgers State Univ, Ceram & Mat Engn Dept, Piscataway, NJ 08854 USA. EM khach@jove.rutgers.edu NR 25 TC 12 Z9 13 U1 3 U2 8 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 1073-5623 J9 METALL MATER TRANS A JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci. PD AUG PY 2005 VL 36A IS 8 BP 2031 EP 2047 DI 10.1007/s11661-005-0324-8 PG 17 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 949OQ UT WOS:000230798400006 ER PT J AU Liu, XB Barbero, E Xu, J Burris, M Chang, KM Sikka, V AF Liu, XB Barbero, E Xu, J Burris, M Chang, KM Sikka, V TI Liquid metal corrosion of 316L, Fe3Al, and FeCrSi in molten Zn-Al baths SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article ID DEGREES-C; ZINC; COATINGS; ALLOYS; ALUMINUM; KINETICS; STEELS; SYSTEM; WEAR; LEAD AB Corrosion tests of 316L and two intermetallic compounds Fe3Al and FeCrSi in industrial Galvanizing (Zn-0.18Al), GALFAN (Zn-5Al), GALVALUME (Zn-55Al), and Aluminizing (Al-8Si) baths and lab-scale static baths were conducted. In on-line tests in industrial hot-dip baths, 316L steel shows better corrosion resistance than Fe3Al in Galvanizing, GALFAN, and GALVALUME baths. The corrosion resistance of 316L and Fe3Al is similar in Aluminizing bath. In static tests, FeCrSi shows the best corrosion resistance in pure Zn, Zn-55Al, and Al-8Si baths. The corrosion resistance of 316L is better than that of Fe3Al. In Zn-5Al bath, 316L shows no thickness loss after the test. For the same bath composition, the corrosion rates of the alloys in industrial baths are higher than those in static baths. Bath temperature and chemical composition play important roles in corrosion and intermetallic layer formation. Increasing bath temperature accelerates the corrosion process and changes the nature of intermetallic layers. A small amount of aluminum reduces the corrosion process by reducing the activity of Zn and forming inhibition layer. However, after aluminum content reaches the critical point, the dominant corrosion process changes from Zn-Fe reaction to Al-Fe reaction, and, consequently, the corrosion process accelerates by increasing aluminum content in the bath. C1 W Virginia Univ, Dept Mech & Aerosp Engn, Morgantown, WV 26506 USA. Oak Ridge Natl Lab, Met & Ceram Proc Grp, Oak Ridge, TN 37831 USA. RP Liu, XB (reprint author), W Virginia Univ, Dept Mech & Aerosp Engn, Morgantown, WV 26506 USA. EM xingbo.liu@mail.wvu.edu NR 36 TC 24 Z9 24 U1 1 U2 7 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 1073-5623 J9 METALL MATER TRANS A JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci. PD AUG PY 2005 VL 36A IS 8 BP 2049 EP 2058 DI 10.1007/s11661-005-0325-7 PG 10 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 949OQ UT WOS:000230798400007 ER PT J AU Ito, K Ta, AT Bishop, DB Nelson, AJ Reynolds, JG Andrews, JC AF Ito, K Ta, AT Bishop, DB Nelson, AJ Reynolds, JG Andrews, JC TI Mercury L3 and sulfur K-edge studies of Hg-bound thiacrowns and back-extracting agents used in mercury remediation SO MICROCHEMICAL JOURNAL LA English DT Article DE mercury remediation; X-ray absorption spectroscopy; ligand spectroscopy ID RAY-ABSORPTION SPECTROSCOPY; SOIL ORGANIC-MATTER; AQUEOUS-SOLUTIONS; REDUCED SULFUR; METHYL MERCURY; HEAVY-METALS; COMPLEXES; ETHERS; TEMPERATURE; BINDING AB Effective methods for the removal of mercury from water are in demand due to the high levels of mercury released from industrial and natural processes. Polymer pendant thiacrown compounds used for the sequestration of Hg(II) from aqueous solutions passed through columns have shown great promise as effective tools for remediation. The mercury can potentially be removed from the columns by extraction with diethyldithiocarbamate (dtc) and diphenylthiocarbazone, aka dithizone (dtz). In this study, Hg L3 and sulfur K-edge X-ray absorption spectroscopy are used to contrast the structure of the mercury thiacrown complex Hg[17]aneS5 with the structure of mercury bound to two potential back-extracting agents, Hg(dtC)(2) and Hg(dtZ)(2)- In Hg(dtC)2, it was found that Hg(II) was bound to four sulfur atoms, with two Hg S bond lengths of 2.66 angstrom and two Hg-S at 2.49 angstrom. In Hg(dtZ)(2), Hg(II) was bound to two sulfur atoms with Hg-S bond distances of 2.38 angstrom and two nitrogen atoms with Hg-N at 2.54 angstrom. This contrasts with Hg[17]aneS(5) with three Hg-S bonds at 2.40 angstrom. Mercury L3 and S K-edge results show that electron density shifts from sulfur in dtc and dtz, to mercury in Hg(dtc)(2) and Hg(dtz)(2). The increase in the number of bonds, and the more stable geometry and electron distribution in the back-extraction complexes confirms that these compounds are more stable than the mercury thiacrown complex, and thus suitable for regeneration of the pendant-arm [17]aneS(5) for further remediation processes. (c) 2005 Elsevier B.V All rights reserved. C1 Calif State Univ Hayward, Dept Chem, Hayward, CA 94542 USA. Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA. RP Andrews, JC (reprint author), Calif State Univ Hayward, Dept Chem & Biochem, Hayward, CA 94542 USA. EM andrews@csuhayward.edu RI Ito, Keigo/E-5263-2012 NR 47 TC 8 Z9 8 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0026-265X J9 MICROCHEM J JI Microchem J. PD AUG PY 2005 VL 81 IS 1 BP 3 EP 11 DI 10.1016/j.microc.2005.02.001 PG 9 WC Chemistry, Analytical SC Chemistry GA 942EA UT WOS:000230264500003 ER PT J AU Dokken, KM Davis, LC Erickson, LE Castro-Diaz, S Marinkovic, NS AF Dokken, KM Davis, LC Erickson, LE Castro-Diaz, S Marinkovic, NS TI Synchrotron fourier transform infrared micro spectroscopy: A new tool to monitor the fate of organic contaminants in plants SO MICROCHEMICAL JOURNAL LA English DT Article DE phytoremediation; FTIR microspectroscopy; synchrotron radiation; benzotriazole; principal component analysis ID ENDODERMAL CELL-WALLS; CHEMICAL-COMPOSITION; MICROSPECTROSCOPY; BENZOTRIAZOLES; IDENTIFICATION; CHEMOMETRICS; ARCHITECTURE; SPECTRA; ROOTS AB FTIR microspectroscopy, with synchrotron radiation as a source, was used for the first time to study changes in plant structure induced by organic contaminants. Sunflower (Helianthus annuus L.) plants were grown hydroponically in the presence of benzotliazole. Changes in the plant structure due to uptake, incorporation, and/or transformation of benzotriazole were observed. False color intensity maps of benzotriazole treated secondary root sections showed changes in plant structure, as well as the presence of aromatic CH peaks due to incorporation of benzotriazole within the plant. The presence of the characteristic benzotriazole CH out-of-plane bending mode suggests that the contaminant aromatic ring remains intact upon the uptake by the plant. Simultaneously, the changes in the lignin structure suggest that the plant suffered damage by the uptake of the benzotriazole. Spectral variations between the untreated and benzotriazole treated sunflowers were uncovered using principal components analysis (PCA). PCA also revealed clustering according to the different benzotriazole treatments. (c) 2005 Published by Elsevier B.V C1 Kansas State Univ, Dept Biochem, Manhattan, KS 66506 USA. Kansas State Univ, Dept Chem Engn, Manhattan, KS 66506 USA. Brookhaven Natl Lab, Natl Synchrotron Light Source, Albert Einstein Ctr Synchrotron Biosci, Upton, NY 11973 USA. RP Davis, LC (reprint author), Kansas State Univ, Dept Biochem, Manhattan, KS 66506 USA. EM ldavis@ksu.edu RI Marinkovic, Nebojsa/A-1137-2016 OI Marinkovic, Nebojsa/0000-0003-3579-3453 NR 27 TC 15 Z9 16 U1 2 U2 16 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0026-265X J9 MICROCHEM J JI Microchem J. PD AUG PY 2005 VL 81 IS 1 BP 86 EP 91 DI 10.1016/j.microc.2005.01.022 PG 6 WC Chemistry, Analytical SC Chemistry GA 942EA UT WOS:000230264500015 ER PT J AU Summers, CA Dahlin, DC Rush, GE O'Connor, WK Gerdemann, SJ AF Summers, CA Dahlin, DC Rush, GE O'Connor, WK Gerdemann, SJ TI Grinding methods to enhance the reactivity of olivine SO MINERALS & METALLURGICAL PROCESSING LA English DT Article; Proceedings Paper CT Annual Meeting of the Society-of-Manufacturing-Engineers CY FEB 23-25, 2004 CL Denver, CO SP Soc Mfg Engineers DE comminution; ultrafine grinding; olivine reactivity; mechanical activation; reactivity ID PARTICLE-SIZE; DISSOLUTION; MINERALS AB The Albany Research Center (ARC) conducted studies of mechanical activation by conventional and ultra fine grinding techniques to enhance olivine reactivity in mineral carbonation reactions. Activated olivine is one of several solid feed materials used at ARC in reactions with carbon dioxide to form carbonate minerals. This paper compares grinding techniques via energy demand data and product characteristics, including particle size distributions, surface areas, full-width-at-half-maximum (FWHM) XRD analyses, and particle morphology by SEM analyses, Reactivity was calculated by percent conversion to carbonate in subsequent carbonation tests. Particle size reduction has the greatest impact on reactivity, and wet grinding is more energy efficient than dry grinding. Large additional inputs of energy to increase surface area or reduce crystallinity do not result in proportional improvements in reactivity. C1 US DOE, Albany Res Ctr, Albany, OR 97321 USA. RP Summers, CA (reprint author), US DOE, Albany Res Ctr, Albany, OR 97321 USA. NR 11 TC 9 Z9 9 U1 1 U2 3 PU SOC MINING METALLURGY EXPLORATION INC PI LITTLETON PA 8307 SHAFFER PARKWAY, LITTLETON, CO 80127 USA SN 0747-9182 J9 MINER METALL PROC JI Miner. Metall. Process. PD AUG PY 2005 VL 22 IS 3 BP 140 EP 144 PG 5 WC Metallurgy & Metallurgical Engineering; Mining & Mineral Processing SC Metallurgy & Metallurgical Engineering; Mining & Mineral Processing GA 956XU UT WOS:000231334200004 ER PT J AU Barrett, CL Eidenbenz, SJ Kroc, L Marathe, M Smith, JP AF Barrett, CL Eidenbenz, SJ Kroc, L Marathe, M Smith, JP TI Parametric Probabilistic routing in sensor networks SO MOBILE NETWORKS & APPLICATIONS LA English DT Article; Proceedings Paper CT 2nd International Workshop on Wireless Senor Networks and Application (WSNA 2003( CY SEP 19, 2003 CL San Diego, CA DE sensor networks; probabilistic routing; simulation AB Motivated by realistic sensor network scenarios that have mis-informed nodes and variable network topologies, we propose an approach to routing that combines the best features of limited-flooding and information-sensitive path-finding protocols into a reliable, low-power method that can make delivery guarantees independent of parameter values or information noise levels. We introduce Parametric Probabilistic Sensor Network Routing Protocols, a family of light-weight and robust multi-path routing protocols for sensor networks in which an intermediate sensor decides to forward a message with a probability that depends on various parameters, such as the distance of the sensor to the destination, the distance of the source sensor to the destination, or the number of hops a packet has already traveled. We propose two protocol variants of this family and compare the new methods to other probabilistic and deterministic protocols, namely constant-probability gossiping, uncontrolled flooding, random wandering, shortest path routing (and a variation), and a load-spreading shortest-path protocol inspired by (Servetto and Barrenechea, 2002). We consider sensor networks where a sensor's knowledge of the local or global information is uncertain (parametrically noised) due to sensor mobility, and investigate the trade-off between robustness of the protocol as measured by quality of service (in particular, successful delivery rate and delivery lag) and use of resources (total network load). Our results for networks with randomly placed nodes and realistic urban networks with varying density show that the multi-path protocols are less sensitive to misinformation, and suggest that in the presence of noisy data, a limited flooding strategy will actually perform better and use fewer resources than an attempted single-path routing strategy, with the Parametric Probabilistic Sensor Network Routing Protocols outperforming other protocols. Our results also suggest that protocols using network information perform better than protocols that do not, even in the presence of strong noise. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Barrett, CL (reprint author), Los Alamos Natl Lab, CCS-5,MS M997,POB 1663, Los Alamos, NM 87545 USA. EM barrett@lanl.gov; eidenben@lanl.gov; kroc@lanl.gov; marathe@lanl.gov; jpsmith@lanl.gov NR 14 TC 4 Z9 5 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 1383-469X J9 MOBILE NETW APPL JI Mobile Netw. Appl. PD AUG PY 2005 VL 10 IS 4 BP 529 EP 544 DI 10.1007/s11036-005-1565-x PG 16 WC Computer Science, Hardware & Architecture; Computer Science, Information Systems; Telecommunications SC Computer Science; Telecommunications GA 946RO UT WOS:000230590100014 ER PT J AU Mukhopadhyay, A He, Z Alm, E He, Q Yen, B Huang, K Baidoo, E Chen, W Borglin, S Redding, A Holman, HY Sun, J Joyner, D Katz, N Keller, M Zhou, J Arkin, AP Hazen, TC Wall, J Keasling, JD AF Mukhopadhyay, A. He, Z. Alm, E. He, Q. Yen, B. Huang, K. Baidoo, E. Chen, W. Borglin, S. Redding, A. Holman, H-Y. Sun, J. Joyner, D. Katz, N. Keller, M. Zhou, J. Arkin, A. P. Hazen, T. C. Wall, J. Keasling, J. D. TI The anatomy of salt stress in Desulfovibrio vulgaris hildenborough SO MOLECULAR & CELLULAR PROTEOMICS LA English DT Meeting Abstract C1 [Mukhopadhyay, A.; Alm, E.; Huang, K.; Baidoo, E.; Borglin, S.; Holman, H-Y.; Joyner, D.; Katz, N.; Arkin, A. P.; Hazen, T. C.; Keasling, J. D.] Lawrence Berkeley Natl Lab, Berkeley, CA USA. [He, Z.; He, Q.; Zhou, J.; Arkin, A. P.; Keasling, J. D.] Oak Ridge Natl Lab, Oak Ridge, TN USA. [Yen, B.; Wall, J.] Univ Missouri, Columbia, MO USA. [Chen, W.; Sun, J.; Keller, M.] Diversa Inc, San Diego, CA USA. [Redding, A.] Univ Calif Berkeley, Berkeley, CA 94720 USA. RI Arkin, Adam/A-6751-2008; Keller, Martin/C-4416-2012; Keasling, Jay/J-9162-2012; He, Zhili/C-2879-2012; Holman, Hoi-Ying/N-8451-2014; Borglin, Sharon/I-1013-2016; Hazen, Terry/C-1076-2012 OI Arkin, Adam/0000-0002-4999-2931; Keasling, Jay/0000-0003-4170-6088; Holman, Hoi-Ying/0000-0002-7534-2625; Hazen, Terry/0000-0002-2536-9993 NR 0 TC 0 Z9 0 U1 1 U2 4 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA SN 1535-9476 J9 MOL CELL PROTEOMICS JI Mol. Cell. Proteomics PD AUG PY 2005 VL 4 IS 8 SU 1 BP S384 EP S384 PG 1 WC Biochemical Research Methods SC Biochemistry & Molecular Biology GA V44IB UT WOS:000202995300998 ER PT J AU Webb-Robertson, B Cannon, W Oehmen, C Baxter, D AF Webb-Robertson, B. Cannon, W. Oehmen, C. Baxter, D. TI A peptide candidate selection support vector machine for MS-based peptide identification SO MOLECULAR & CELLULAR PROTEOMICS LA English DT Meeting Abstract C1 [Webb-Robertson, B.; Cannon, W.; Oehmen, C.; Baxter, D.] Pacific NW Natl Lab, Richland, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA SN 1535-9476 J9 MOL CELL PROTEOMICS JI Mol. Cell. Proteomics PD AUG PY 2005 VL 4 IS 8 SU 1 BP S33 EP S33 PG 1 WC Biochemical Research Methods SC Biochemistry & Molecular Biology GA V44IB UT WOS:000202995300094 ER PT J AU Bhatia, SK Chen, HB Sholl, DS AF Bhatia, SK Chen, HB Sholl, DS TI Comparisons of diffusive and viscous contributions to transport coefficients of light gases in single-walled carbon nanotubes SO MOLECULAR SIMULATION LA English DT Article; Proceedings Paper CT Annual Meeting of the American-Institute-of-Chemical-Engineers CY NOV, 2004 CL Austin, TX SP Amer Inst Chem Engineers DE transport coefficients; single-walled carbon nanotubes; Lennard-Jones fluids; Maxwell coefficients ID MOLECULAR-TRANSPORT; CH4/H-2 MIXTURES; NONEQUILIBRIUM; SIMULATIONS; NANOPORES; DESIGN; FLUIDS; FLOW; NE; AR AB We examine here the relative importance of different contributions to transport of light gases in single walled carbon nanotubes, using methane and hydrogen as examples. Transport coefficients at 298 K are determined using molecular dynamics simulation with atomistic models of the nanotube wall, from which the diffusive and viscous contributions are resolved using a recent approach that provides an explicit expression for the latter. We also exploit an exact theory for the transport of Lennard-Jones fluids at low density considering diffuse reflection at the tube wall, thereby permitting the estimation of Maxwell coefficients for the wall reflection. It is found that reflection from the carbon nanotube wall is nearly specular, as a result of which slip flow dominates, and the viscous contribution is small in comparison, even for a tube as large as 8.1 nm in diameter. The reflection coefficient for hydrogen is 3-6 times as large as that for methane in tubes of 1.36 nm diameter, indicating less specular reflection for hydrogen and greater sensitivity to atomic detail of the surface. This reconciles results showing that transport coefficients for hydrogen and methane, obtained in simulation, are comparable in tubes of this size. With increase in adsorbate density, the reflection coefficient increases, suggesting that adsorbate interactions near the wall serve to roughen the local potential energy landscape perceived by fluid molecules. C1 Univ Queensland, Div Chem Engn, Brisbane, Qld 4072, Australia. Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA. Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. RP Bhatia, SK (reprint author), Univ Queensland, Div Chem Engn, Brisbane, Qld 4072, Australia. EM sureshb@cheque.uq.edu.au RI Bhatia, Suresh/P-6196-2016 OI Bhatia, Suresh/0000-0001-9716-0112 NR 31 TC 54 Z9 55 U1 2 U2 11 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0892-7022 J9 MOL SIMULAT JI Mol. Simul. PD AUG PY 2005 VL 31 IS 9 BP 643 EP 649 DI 10.1080/00268970500108403 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 956PJ UT WOS:000231312000005 ER PT J AU Lipscomb, WH Ringler, TD AF Lipscomb, WH Ringler, TD TI An incremental remapping transport scheme on a spherical geodesic grid SO MONTHLY WEATHER REVIEW LA English DT Article ID SHALLOW-WATER EQUATIONS; BAROTROPIC VORTICITY EQUATION; INTEGRATION; ALGORITHMS; MODEL AB Weather and climate models contain equations for transporting conserved quantities such as the mass of air, water, ice, and associated tracers. Ideally, the numerical schemes used to solve these equations should be conservative, spatially accurate, and monotonicity-preserving. One such scheme is incremental remapping, previously developed for transport on quadrilateral grids. Here the incremental remapping scheme is reformulated for a spherical geodesic grid whose cells are hexagons and pentagons. The scheme is tested in a shallow-water model with both uniform and varying velocity fields. Solutions for standard shallow-water test cases 1, 2, and 5 are obtained with a centered scheme, a flux-corrected transport (FCT) scheme, and the remapping scheme. The three schemes are about equally accurate for transport of the height field. For tracer transport, remapping is far superior to the centered scheme, which produces large overshoots, and is generally smoother and more accurate than FCT. Remapping has a high startup cost associated with geometry calculations but is nearly twice as fast as FCT for each added tracer. As a result, remapping is cheaper than FCT for transport of more than about seven tracers. C1 Los Alamos Natl Lab, Grp T3, Los Alamos, NM 87545 USA. Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA. RP Los Alamos Natl Lab, Grp T3, MS B216, Los Alamos, NM 87545 USA. EM Lipscomb@lanl.gov NR 26 TC 29 Z9 29 U1 0 U2 2 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0027-0644 EI 1520-0493 J9 MON WEATHER REV JI Mon. Weather Rev. PD AUG PY 2005 VL 133 IS 8 BP 2335 EP 2350 DI 10.1175/MWR2983.1 PG 16 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 955TM UT WOS:000231250500014 ER PT J AU Talley, CE Jackson, JB Oubre, C Grady, NK Hollars, CW Lane, SM Huser, TR Nordlander, P Halas, NJ AF Talley, CE Jackson, JB Oubre, C Grady, NK Hollars, CW Lane, SM Huser, TR Nordlander, P Halas, NJ TI Surface-enhanced Raman scattering from individual Au nanoparticles and nanoparticle dimer substrates SO NANO LETTERS LA English DT Article ID DIFFERENCE TIME-DOMAIN; OPTICAL-PROPERTIES; GOLD NANOSHELLS; PLASMON RESONANCES; MOLECULE SENSITIVITY; SINGLE NANOPARTICLES; SILVER NANOPARTICLES; NANOSTRUCTURES; SPECTRA AB Surf ace-enhanced Raman scattering (SERS) intensities for individual Au nanospheres, nanoshells, and nanosphere and nanoshell dimers coated with nonresonant molecules are measured, where the precise nanoscale geometry of each monomer and dimer is identified through in situ atomic force microscopy. The observed intensities correlate with the integrated quartic local electromagnetic field calculated for each specific nanostructure geometry. In this study, we find that suitably fabricated nanoshells can provide SERS enhancements comparable to nanosphere dimers. C1 Rice Univ, Dept Elect & Comp Engn, Houston, TX 77005 USA. Rice Univ, Lab Nanophoton, Houston, TX 77005 USA. Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA. Lawrence Livermore Natl Lab, Phys & Adv Technol Directorate, Livermore, CA 94550 USA. Univ Calif Davis, NSF, Ctr Biophoton Sci & Technol, Sacramento, CA 95817 USA. Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA. RP Rice Univ, Dept Elect & Comp Engn, POB 1892, Houston, TX 77005 USA. EM halas@rice.edu RI Grady, Nathaniel/A-4896-2011; Halas, Naomi/D-2935-2011; Huser, Thomas/H-1195-2012; Nordlander, Peter/A-2560-2008 OI Grady, Nathaniel/0000-0002-0885-3337; Huser, Thomas/0000-0003-2348-7416; Nordlander, Peter/0000-0002-1633-2937 NR 39 TC 700 Z9 707 U1 74 U2 565 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 AUG PY 2005 VL 5 IS 8 BP 1569 EP 1574 DI 10.1021/nl050928v PG 6 WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA 955FQ UT WOS:000231211300008 PM 16089490 ER PT J AU Tang, QL Zhang, YX Chen, LH Yan, FN Wang, R AF Tang, QL Zhang, YX Chen, LH Yan, FN Wang, R TI Protein delivery with nanoscale precision SO NANOTECHNOLOGY LA English DT Article ID ATOMIC-FORCE MICROSCOPY; DIP-PEN NANOLITHOGRAPHY; LIVING CELLS; SURFACES; RESOLUTION AB A novel assay of protein delivery to a surface with nanoscale precision was established. This was achieved by combining recent advancements in atomic force microscopy (AFM) and bioconjugation. We utilized a heterobifunctional photocleavable cross linker to functionalize an AFM tip with proteins. Upon irradiation, the proteins were released from the tip due to a photolytic reaction of the cross linker. These proteins bound tightly to their binding partners on a substrate. When tip functionalization is carefully controlled, proteins can be locally delivered to a desired area. Importantly, the result of protein delivery can be examined immediately by high-resolution imaging in the same area,using the protein-free tip. Successful protein delivery was also confirmed by fluorescence imaging and was proved to be reproducible.. The approach allows protein delivery and subsequent imaging to be performed in the same local area with the same AFM tip, thus opening up the possibility of monitoring protein functions in living cells in real time. C1 IIT, Chicago, IL 60616 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Wang, R (reprint author), IIT, Chicago, IL 60616 USA. EM wangr@iit.edu RI Zhang, Yuexing/A-1675-2010 NR 31 TC 10 Z9 10 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0957-4484 J9 NANOTECHNOLOGY JI Nanotechnology PD AUG PY 2005 VL 16 IS 8 BP 1062 EP 1068 DI 10.1088/0957-4484/16/8/011 PG 7 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied SC Science & Technology - Other Topics; Materials Science; Physics GA 957YX UT WOS:000231410600011 ER PT J AU D'haeseleer, P AF D'haeseleer, P TI Closing the circle of osmoregulation SO NATURE BIOTECHNOLOGY LA English DT Editorial Material AB A new computational model of osmotic shock in yeast integrates biochemistry and biophysics. C1 Lawrence Livermore Natl Lab, Biosci Directorate, Microbial Syst Div, Livermore, CA 94551 USA. RP D'haeseleer, P (reprint author), Lawrence Livermore Natl Lab, Biosci Directorate, Microbial Syst Div, POB 808,L-448, Livermore, CA 94551 USA. EM partikd@llnl.gov OI D'haeseleer, Patrik/0000-0003-0007-8150 NR 7 TC 1 Z9 1 U1 0 U2 0 PU NATURE PUBLISHING GROUP PI NEW YORK PA 345 PARK AVENUE SOUTH, NEW YORK, NY 10010-1707 USA SN 1087-0156 J9 NAT BIOTECHNOL JI Nat. Biotechnol. PD AUG PY 2005 VL 23 IS 8 BP 941 EP 942 DI 10.1038/nbt0805-941 PG 2 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA 952QF UT WOS:000231019900018 PM 16082361 ER PT J AU Mitchell, DA Marletta, MA AF Mitchell, DA Marletta, MA TI Thioredoxin catalyzes the S-nitrosation of the caspase-3 active site cysteine SO NATURE CHEMICAL BIOLOGY LA English DT Article ID NITRIC-OXIDE; NITROSYLATION; APOPTOSIS; ACTIVATION; KINETICS; THIOLS; NITROSOGLUTATHIONE; TRANSNITROSATION; NITROSOTHIOLS; INHIBITION AB Nitric oxide (NO) signaling through the formation of cGMP is well established; however, there seems to be an increasing role for cGMP-independent NO signaling. Although key molecular details remain unanswered, S-nitrosation represents an example of cGMP-independent NO signaling. This modification has garnered recent attention as it has been shown to modulate the function of several important biochemical pathways(1-3). Although an analogy to O-phosphorylation can be drawn(4), little is known about protein nitrosothiol regulation in vivo. In solution, NO readily reacts with oxygen to yield a nitrosating agent, but this process alone provides no specificity for nitrosation(5). This lack of specificity is exemplified by the in vitro poly-S-nitrosation of caspase-3 (Casp-3, ref. 6) and the ryanodine receptor(7). Previous in vivo work with Casp-3 suggests that a protein-assisted process may be responsible for selective S-nitrosation of the catalytic cysteine (Cys163)(8). We demonstrated that a single cysteine in thioredoxin (Trx) is capable of a targeted, reversible transnitrosation reaction with Cys163 of Casp-3. A greater understanding of how S-nitrosation is mediated has broad implications for cGMP-independent signaling. The example described here also suggests a new role for Trx in the regulation of apoptosis. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA. Univ Calif Berkeley, Div Phys Biosci, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Marletta, MA (reprint author), Univ Calif Berkeley, Dept Chem, 211 Lewis Hall, Berkeley, CA 94720 USA. EM marletta@berkeley.edu RI Mitchell, Douglas/C-4400-2011; Mitchell, Doug/B-6349-2012 OI Mitchell, Doug/0000-0002-9564-0953 FU NCI NIH HHS [CA 26731] NR 33 TC 151 Z9 155 U1 1 U2 11 PU NATURE PUBLISHING GROUP PI NEW YORK PA 345 PARK AVENUE SOUTH, NEW YORK, NY 10010-1707 USA SN 1552-4450 J9 NAT CHEM BIOL JI Nat. Chem. Biol. PD AUG PY 2005 VL 1 IS 3 BP 154 EP 158 DI 10.1038/nchembio720 PG 5 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 975GJ UT WOS:000232648700015 PM 16408020 ER PT J AU Reagor, DW Butko, VY AF Reagor, DW Butko, VY TI Highly conductive nanolayers on strontium titanate produced by preferential ion-beam etching SO NATURE MATERIALS LA English DT Article ID ELECTRONIC CONDUCTION; SEMICONDUCTING SRTIO3; THIN-FILMS; SUPERCONDUCTIVITY; MOBILITY; IMPLANTATION AB Developing fabrication methods for electronically active nanostructures is an important challenge of modern science and technology. Fabrication efforts(1-4) for crystalline materials have been focused on state-of-the-art epitaxial growth techniques. These techniques are based on deposition of precisely controlled combinations of various materials on a heated substrate. We report a method that does not require deposition and transforms a nanoscale layer of a complex crystalline compound into a new material using low-energy ion-beam preferential etching (IBPE). We demonstrate this method by transforming a widely used(5-10) insulator model system, SrTiO3, into a transparent conductor. Most significantly, the resistivity decreases with decreasing temperature as similar to T-2.5 +/- 0.3 and eventually falls below that of room-temperature copper. These transport measurements imply a crystal quality in the conduction channel comparable to that obtained(1) with the highest-quality growth techniques. The universality of low-energy IBPE implies wide potential applicability to fabrication of other nanolayers. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM reagor@lanl.gov NR 25 TC 84 Z9 84 U1 8 U2 36 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 AUG PY 2005 VL 4 IS 8 BP 593 EP 596 DI 10.1038/nmat1402 PG 4 WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA 950TW UT WOS:000230881800010 PM 16007093 ER PT J AU Delrio, FW De Boer, MP Knapp, JA Reedy, ED Clews, PJ Dunn, ML AF Delrio, FW De Boer, MP Knapp, JA Reedy, ED Clews, PJ Dunn, ML TI The role of van der Waals forces in adhesion of micromachined surfaces SO NATURE MATERIALS LA English DT Article ID MICROELECTROMECHANICAL SYSTEMS; MONOLAYER FILMS; ELASTIC SOLIDS; ANTI-STICTION; RETARDED VAN; MEMS; MICROCANTILEVERS; CANTILEVERS; REDUCTION; CONTACT AB Interfacial adhesion and friction are important factors in determining the performance and reliability of microelectro-mechanical systems. We demonstrate that the adhesion of micromachined surfaces is in a regime not considered by standard rough surface adhesion models. At small roughness values, our experiments and models show unambiguously that the adhesion is mainly due to van der Waals dispersion forces acting across extensive non-contacting areas and that it is related to 1/D-ave(2), where D-ave is the average surface separation. These contributions must be considered because of the close proximity of the surfaces, which is a result of the planar deposition technology. At large roughness values, van der Waals forces at contacting asperities become the dominating contributor to the adhesion. In this regime our model calculations converge with standard models in which the real contact area determines the adhesion. We further suggest that topographic correlations between the upper and lower surfaces must be considered to understand adhesion completely. C1 Sandia Natl Labs, Radiat & Reliabil Phys Dept, Albuquerque, NM 87185 USA. Univ Colorado, Dept Mech Engn, Boulder, CO 80309 USA. Sandia Natl Labs, Radiat Solid Interact Dept, Albuquerque, NM 87185 USA. Sandia Natl Labs, Mat Mech Dept, Albuquerque, NM 87185 USA. Sandia Natl Labs, Microelect Operat Dept, Albuquerque, NM 87185 USA. RP De Boer, MP (reprint author), Sandia Natl Labs, Radiat & Reliabil Phys Dept, POB 5800, Albuquerque, NM 87185 USA. EM mpdebo@sandia.gov RI de Boer, Maarten/C-1525-2013; OI de Boer, Maarten/0000-0003-1574-9324; DUNN, MARTIN/0000-0002-4531-9176 NR 36 TC 268 Z9 272 U1 5 U2 87 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 1476-1122 J9 NAT MATER JI Nat. Mater. PD AUG PY 2005 VL 4 IS 8 BP 629 EP 634 DI 10.1038/nmat1431 PG 6 WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA 950TW UT WOS:000230881800017 PM 16025121 ER PT J AU McMichael, GA Rakowski, CL James, BB Lukas, JA AF McMichael, GA Rakowski, CL James, BB Lukas, JA TI Estimated fall Chinook salmon survival to emergence in dewatered Redds in a shallow side channel of the Columbia River SO NORTH AMERICAN JOURNAL OF FISHERIES MANAGEMENT LA English DT Editorial Material ID TOLERANCE; FLOW AB Fall Chinook salmon Oncorhynchus tshawytscha often spawn in the tailraces of large hydroelectric dams on the Columbia River. Redds built in shallow habitats downstream of these dams may be periodically dewatered as a result of load-following operations and subsequent changes in water surface elevation before the fry emerge. To determine whether fall Chinook salmon redds in a shallow area subjected to periodic dewatering downstream of Wanapum Dam on the Columbia River produced live fry, we installed seven redd caps and monitored emergence. Large numbers of live fry were captured from the redds between March 9 and May 18, 2003. Estimated survival from egg to fry for these redds, which were dewatered approximately 3.1% of the time during the posthatch intragravel rearing period, ranged from 16.9% to 66.6% and averaged 29.2% (assuming 4,272 viable eggs/redd). The peak emergence date ranged from April I to April 29 (average, about April 14). Peak emergence dates corresponded well with predicted emergence dates based on 1,000 accumulated temperature units. For fall Chinook salmon emerging from individual redds the mean fork length for each redd ranged from 38.3 to 41.2 mm. and lengths of fish emerging from individual redds increased throughout the emergence period. C1 Pacific NW Lab, Ecol Grp, Richland, WA 99352 USA. Pacific NW Lab, Hydrol Grp, Richland, WA 99352 USA. Cascade Aquat LLC, Ellensburg, WA 98926 USA. Publ Util Dist, Ephrata, WA 98823 USA. RP McMichael, GA (reprint author), Pacific NW Lab, Ecol Grp, Mail Stop K6-85,POB 999, Richland, WA 99352 USA. EM geoffrey.mcmichael@pnl.gov NR 20 TC 26 Z9 28 U1 2 U2 10 PU AMER FISHERIES SOC PI BETHESDA PA 5410 GROSVENOR LANE SUITE 110, BETHESDA, MD 20814-2199 USA SN 0275-5947 J9 N AM J FISH MANAGE JI North Am. J. Fish Manage. PD AUG PY 2005 VL 25 IS 3 BP 876 EP 884 DI 10.1577/M04-168.1 PG 9 WC Fisheries SC Fisheries GA 956YT UT WOS:000231336800014 ER PT J AU Bhagwat, A AF Bhagwat, A TI Nuclear data sheets for A=254 SO NUCLEAR DATA SHEETS LA English DT Review ID FISSION HALF-LIVES; SUPERHEAVY NUCLEI; HEAVIEST ELEMENTS; ISOMERIC STATES; ALPHA-DECAY; Z GREATER; MICROSCOPIC DESCRIPTION; SPONTANEOUS EMISSION; FORMATION MECHANISM; PAIRING VIBRATIONS AB The experimental results for the structure and decay studies for the A=254 isobaric chain, Z=93 to 108, have been reviewed. These data are summarized and presented together with the adopted levels, decay schemes and radiation properties. Theoretical studies are given as comments. The following nuclides for A=254 have not been observed and only their theoretical or systematic studies have been reported: Z=93(Np) to Z=97 (13k); Z=105 (Db) to Z=108 (Hs). New measurements have been reported in No-254. C1 Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India. Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England. Brookhaven Natl Lab, NNDC, Upton, NY 11973 USA. RP Bhagwat, A (reprint author), Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India. NR 130 TC 6 Z9 6 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 J9 NUCL DATA SHEETS JI Nucl. Data Sheets PD AUG PY 2005 VL 105 IS 4 BP 959 EP + DI 10.1016/j.nds.2005.10.002 PG 26 WC Physics, Nuclear SC Physics GA 987CC UT WOS:000233495000002 ER PT J AU Dundulis, G Alzbutas, R Kulak, RF Marchertas, PV AF Dundulis, G Alzbutas, R Kulak, RF Marchertas, PV TI Reliability analysis of pipe whip impacts SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article; Proceedings Paper CT 17th International Conference on Structural Mechanics in Nuclear Engineering (SMiRT-17) CY AUG 20-23, 2003 CL Prague, CZECH REPUBLIC AB A probability-based approach is presented as the integration of probabilistic methods and deterministic modelling based on the finite element method. An existing finite element software package was linked to an existing probabilistic package to analyse the complex mechanics that occur during the transient non-linear analysis of impact problems. This methodology is applied to a pipe whip analysis of a group-distribution-header, which results from a guillotine break, and subsequent impact with the adjacent building wall; this is a postulated accident for the Ignalina Nuclear Power Plant RBMK-1500 reactors. The uncertainties of material properties, component geometry data and loads were taken into consideration. The probabilities of failure of the impacted header and of the header support-wall were estimated given uncertainties in material properties, geometrical parameters and loading. The software ProFES was used for the probabilistic analysis and the finite element software NEPTUNE for deterministic structural integrity evaluation. The Monte Carlo Simulation, First Order Reliability method and Response Surface method were used in the probabilistic analysis. (c) 2005 Elsevier B.V. All rights reserved. C1 Lithuanian Energy Inst, Lab Nucl Installat Safety, LT-44403 Kaunas, Lithuania. Argonne Natl Lab, Argonne, IL 60439 USA. RP Dundulis, G (reprint author), Lithuanian Energy Inst, Lab Nucl Installat Safety, 3 Breslaujos, LT-44403 Kaunas, Lithuania. EM gintas@isag.lei.lt NR 10 TC 1 Z9 1 U1 1 U2 3 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD AUG PY 2005 VL 235 IS 17-19 BP 1897 EP 1908 DI 10.1016/j.nucengdes.2005.05.007 PG 12 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 965QG UT WOS:000231964800012 ER PT J AU Kessel, CE Synakowski, EJ Bell, ME Gates, DA Harvey, RW Kaye, SM Mau, TK Menard, J Phillips, CK Taylor, G Wilson, R AF Kessel, CE Synakowski, EJ Bell, ME Gates, DA Harvey, RW Kaye, SM Mau, TK Menard, J Phillips, CK Taylor, G Wilson, R CA NSTX Res Team TI Advanced ST plasma scenario simulations for NSTX SO NUCLEAR FUSION LA English DT Article ID SPHERICAL TORUS EXPERIMENT; HIGH-BETA; CONFINEMENT; TRANSPORT; STABILITY AB Integrated scenario simulations are done for NSTX that address four primary objectives for developing advanced spherical torus (ST) configurations: high beta and high beta(N) inductive discharges to study all aspects of ST physics in the high regime; non-inductively sustained discharges for flattop times greater than the skin time to study the various current drive techniques; non-inductively sustained discharges at high for flattop times much greater than a skin time which provides the integrated advanced ST target for NSTX and non-solenoidal startup and plasma current rampup. The simulations done here use the tokamak simulation code and are based on a discharge 109070. TRANSP analysis of the discharge provided the thermal diffusivities for electrons and ions, the neutral beam deposition profile and other characteristics. CURRAY is used to calculate the high harmonic fast wave (HHFW) heating depositions and current drive. GENRAY/CQL3D is used to establish the heating and CD deposition profiles for electron Bernstein waves (EBW). Analysis of the ideal MHD stability is done with JSOLVER, BALMSC and PEST2. The simulations indicate that the integrated advanced ST plasma is reachable, obtaining stable plasmas with beta(T) approximate to 40% at beta(N)'S of 7.7-9, I-P = 1.0 MA and B-T = 0.35 T. The plasma is 100% non-inductive and has a flattop of four skin times. The resulting global energy confinement corresponds to a multiplier of H-98(gamma),2 = 1.5. The simulations have demonstrated the importance of HHFW heating and CD, EBW off-axis CD, strong plasma shaping, density control and early heating/H-mode transition for producing and optimizing these plasma configurations. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. CompX, Del Mar, CA USA. Univ Calif San Diego, San Diego, CA 92103 USA. RP Kessel, CE (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. EM ckessel@pppl.gov OI Menard, Jonathan/0000-0003-1292-3286 NR 17 TC 14 Z9 14 U1 1 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 AUG PY 2005 VL 45 IS 8 BP 814 EP 824 DI 10.1088/0029-5515/45/5/007 PG 11 WC Physics, Fluids & Plasmas SC Physics GA 962RB UT WOS:000231748800007 ER PT J AU Spong, DA Hirshman, SP Lyon, JF Berry, LA Strickler, DJ AF Spong, DA Hirshman, SP Lyon, JF Berry, LA Strickler, DJ TI Recent advances in quasi-poloidal stellarator physics issues SO NUCLEAR FUSION LA English DT Article ID TOROIDAL PLASMAS; TRANSPORT; COEFFICIENTS; TORUS AB The quasi-poloidal stellarator (QPS) hybrid has been developed using a stellarator optimization approach that has proven to be compatible with both low aspect ratio and significantly reduced neoclassical transport relative to anomalous levels. A unique characteristic of this type of quasi-symmetry is a reduced viscous damping level for poloidal plasma flows. Since the plasma-generated Epsilon x B and diamagnetic flows are nearly poloidal, minimal parallel flows (and viscous stress) are required to achieve parallel pressure balance in comparison with configurations such as the tokamak, in which the plasma induced flows are nearly perpendicular to the direction of minimum viscosity and relatively larger parallel flows are required. In addition to this impact on neoclassical flows it is also anticipated that quasi-poloidal symmetry will minimize resistance to self-organized plasma-turbulence-driven shear flows and ease access to enhanced confinement states. In order to test these and other transport issues, the QPS device has been designed with a high degree of flexibility by allowing variable current capability not only in its vertical and toroidal coilsets but also in each separate modular coil group. Numerical optimizations have demonstrated that this flexibility can be used not only to modify transport properties, such as the poloidal viscosity, but also to directly suppress magnetic islands. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. RP Spong, DA (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. EM spongda@ornl.gov RI Spong, Donald/C-6887-2012 OI Spong, Donald/0000-0003-2370-1873 NR 14 TC 12 Z9 12 U1 0 U2 1 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 AUG PY 2005 VL 45 IS 8 BP 918 EP 925 DI 10.1088/0029-5515/45/8/020 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 962RB UT WOS:000231748800020 ER PT J AU Horton, W Wong, HV Morrison, PJ Wurm, A Kim, JH Perez, JC Pratt, J Hoang, GT LeBlanc, BP Ball, R AF Horton, W Wong, HV Morrison, PJ Wurm, A Kim, JH Perez, JC Pratt, J Hoang, GT LeBlanc, BP Ball, R TI Temperature gradient driven electron transport in NSTX and Tore Supra SO NUCLEAR FUSION LA English DT Article ID CROSS-POLARIZATION SCATTERING; FLUCTUATIONS; MAP; RECONNECTION; SIMULATIONS; DESTRUCTION; TURBULENCE; TOKAMAK; WAVES; MODEL AB Electron thermal fluxes are derived from the power balance for Tore Supra (TS) and NSTX discharges with centrally deposited fast wave electron heating. Measurements of the electron temperature and density profiles, combined with ray tracing computations of the power absorption profiles, allow detailed interpretation of the thermal flux versus temperature gradient. Evidence supporting the occurrence of electron temperature gradient turbulent transport in the two confinement devices is found. With control of the magnetic rotational transform profile and the heating power, internal transport barriers are created in TS and NSTX discharges. These partial transport barriers are argued to be a universal feature of transport equations in the presence of invariant tori that are intrinsic to non-monotonic rotational transforms in dynamical systems. C1 Univ Texas, Inst Fus Studies, Austin, TX 78712 USA. EURATOM, CEA, DSM, DRFC, F-13108 St Paul Les Durance, France. Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. Australian Natl Univ, Canberra, ACT, Australia. RP Horton, W (reprint author), Univ Texas, Inst Fus Studies, Austin, TX 78712 USA. RI Pratt, Jane/A-2462-2013; Ball, Rowena/A-5973-2008; Kim, Juhyung/F-5404-2013; OI Pratt, Jane/0000-0003-2707-3616; Ball, Rowena/0000-0002-3551-3012; Kim, Juhyung/0000-0002-5409-2743; Perez, Jean C/0000-0002-8841-6443 NR 27 TC 18 Z9 18 U1 0 U2 4 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 AUG PY 2005 VL 45 IS 8 BP 976 EP 985 DI 10.1088/0029-5515/45/8/025 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 962RB UT WOS:000231748800025 ER PT J AU Ostroumov, PN Kolomiets, AA Sharma, S Vinogradov, NE Zinkann, GP AF Ostroumov, PN Kolomiets, AA Sharma, S Vinogradov, NE Zinkann, GP TI An innovative concept for acceleration of low-energy low-charge-state heavy-ion beams SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE heavy-ion beam; radio frequency quadrupole; drift tube; beam dynamics; cold model AB A new accelerating structure called Hybrid RFQ (H-RFQ) is suggested. The structure consists or an alternating series of drift tubes (DTLs) and radio frequency quadrupole (RFQ) sections incorporated into one resonator. The proposed approach allows one to achieve twice as much average accelerating gradient compared to a conventional RFQ. A particular version of a 12.125 MHz H-RFQ has been developed for the Rare Isotope Accelerator (RIA) (Nolen, Nucl. Phys. A 734 (2004) 661-668, Ostroumov et al., Nucl Instr. and Meth. B 204 (2003) 433-439). A half-scale model of this structure has been built and studied to determine the final specifications for the full-power prototype. This paper presents comprehensive beam dynamics studies in a H-RFQ accelerating structure and experimental investigations of the 12.125 MHz H-RFQ model. Possible applications of H-RFQ structures are discussed. (c) 2005 Elsevier B.V. All rights reserved. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Argonne Natl Lab, Div Phys, 9700 S Cass Ave, Argonne, IL 60439 USA. EM vinogradov@phy.anl.gov NR 15 TC 4 Z9 4 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 EI 1872-9576 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD AUG 1 PY 2005 VL 547 IS 2-3 BP 259 EP 269 DI 10.1016/j.nima.2005.03.138 PG 11 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 952KG UT WOS:000231001800003 ER PT J AU Milbrath, BD Runkle, RC Hossbach, TW Kaye, WR Lepel, EA McDonald, BS Smith, LE AF Milbrath, BD Runkle, RC Hossbach, TW Kaye, WR Lepel, EA McDonald, BS Smith, LE TI Characterization of alpha contamination in lanthanum trichloride scintillators using coincidence measurements SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE lanthanum-chloride; scintillator; alpha-contaminant; alpha gamma coincidence; actimum-227 AB The commercial availability of LaCl3:Ce scintillators has been much anticipated title to their significantly higher resolution relative to Nal(Tl). Our investigation of these scintillators for coincidence gamma-ray measurement applications revealed that them scintillators had a large. internal alpha contamination affecting the gamma-ray energy range from 1700 to 3000 keV. One passive method of identifying contaminants relies on exploiting coincident signatures, Aided by a coincidence signature library developed at PNNL. Ne determined that the parent contaminant is Ac-227 via all alpha gamma coincidence measurement, In this paper, we characterize the level of contamination and describe our coincidence measurement technique, The Ac-227 concentration v as approximately 0.13 ppt. We demonstrate that this coincidence technique measures minimum detectable activities much lower than single gamma-ray spectroscopy, We, also discuss gamma- and beta-contamination in these scintillators. (c) 2005 Elsevier B.V. All rights reserved. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Milbrath, BD (reprint author), Pacific NW Natl Lab, MS P8-20,POB 999, Richland, WA 99352 USA. EM brian.milbrath@pnl.gov OI McDonald, Benjamin/0000-0002-4596-9670 NR 18 TC 37 Z9 38 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD AUG 1 PY 2005 VL 547 IS 2-3 BP 504 EP 510 DI 10.1016/j.nima.2004.11.054 PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 952KG UT WOS:000231001800026 ER PT J AU Hammond, NJ Duguet, T Lister, CJ AF Hammond, NJ Duguet, T Lister, CJ TI Ambiguity in gamma-ray tracking of 'two-interaction' events SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE gamma-ray tracking; Compton scattering; segmented germanium detectors ID COMPTON POLARIMETER; DETECTOR; GRETA AB Tracking of gamma-rays in germanium detectors can allow the full reconstruction of interactions, a feature that is useful in many applications. Scrutiny of the kinematics and geometry of gamma-rays which are Compton scattered only once prior to full absorption reveals that there are special cases where even perfect spatial and energy resolution cannot resolve the true interaction sequence and consequently the gamma-ray tracks cannot be unambiguously reconstructed. The photon energy range where this ambiguity exists is from 255 keV to about 700 keV. This is an energy region of importance for nuclear structure research and a domain where two-point interactions are probable. Published by Elsevier B.V. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Lister, CJ (reprint author), Argonne Natl Lab, Div Phys, 9700 S Cass Ave, Argonne, IL 60439 USA. EM lister@anl.gov OI Hammond, Neil/0000-0001-6390-8874 NR 17 TC 4 Z9 4 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 AUG 1 PY 2005 VL 547 IS 2-3 BP 535 EP 540 DI 10.1016/j.nima.2005.03.148 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 952KG UT WOS:000231001800029 ER PT J AU Muhrer, G Pitcher, EJ Russell, GJ Maekawa, F Kasugai, Y Takada, H AF Muhrer, G Pitcher, EJ Russell, GJ Maekawa, F Kasugai, Y Takada, H TI Comparison of calculated and measured high energy neutron reaction rates at the manual Jr. Lujan Center Spallation Source SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE spallation source; moderators; high energy neutron reactions (n ; xn); MCNPX ID SHIELDING MEASUREMENTS; CROSS-SECTIONS; BEAM AB In December 2001. we measured the in beam high-energy neutron intensities on several of the beamlines at the spallation neutron source at the Lujan Center, Los Alamos, USA. This effort was then followed by a comparison of these measurements with Monte Carlo transport simulations. In this paper we present the results of these simulations and their comparison with the measurements. (c) 2005 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Japan Atom Energy Res Inst, Tokai, Ibaraki, Japan. RP Muhrer, G (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM muhrer@lanl.gov RI Lujan Center, LANL/G-4896-2012 NR 18 TC 5 Z9 5 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD AUG 1 PY 2005 VL 547 IS 2-3 BP 555 EP 568 DI 10.1016/j.nima.2005.04.008 PG 14 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 952KG UT WOS:000231001800031 ER PT J AU Parrot, IM Urban, V Gardner, KH Forsyth, VT AF Parrot, IM Urban, V Gardner, KH Forsyth, VT TI Combined X-ray and neutron fibre diffraction studies of biological and synthetic polymers SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 4th International Conference on Synchrotron Radiation in Materials Science (SRMS-4) CY AUG 23-25, 2004 CL Grenoble, FRANCE ID POLY(P-PHENYLENE TEREPHTHALAMIDE); CRYSTAL; ANGLE AB The fibrous state is a natural one for polymer molecules which tend to assume regular helical conformations rather than the globular structures characteristic of many proteins. Fibre diffraction therefore has broad application to the study of a wide range of biological and synthetic polymers. The purpose of this paper is to illustrate the general scope of the method and in particular to demonstrate the impact of a combined approach involving both X-ray and neutron diffraction methods. While the flux of modern X-ray synchrotron radiation sources allows high quality datasets to be recorded with good resolution within a very short space of time, neutron studies can provide unique information through the ability to locate hydrogen or deuterium atoms that are often difficult or impossible to locate using X-ray methods. Furthermore, neutron fibre diffraction methods can, through the ability to selectively label specific parts of a structure, be used to highlight novel aspects of polymer structure that can not be studied using X-rays. Two examples are given. The first describes X-ray and neutron diffraction studies of conformational transitions in DNA. The second describes structural studies of the synthetic high-performance polymer poly(p-phenylene terephthalamide) (PPTA), known commercially as Kevlar (R) or Twaron (R). (c) 2005 Elsevier B.V. All rights reserved. C1 Inst Laue Langevin, F-38042 Grenoble, France. Univ Keele, Sch Med, Inst Sci & Technol Med, Keele ST4 7QB, Staffs, England. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Delaware, Dept Mat Sci & Engn, Newark, DE 19719 USA. RP Forsyth, VT (reprint author), Inst Laue Langevin, 6 Rue Jules Horowitz, F-38042 Grenoble, France. EM tforsyth@ill.fr RI Forsyth, V. Trevor/A-9129-2010; Urban, Volker/N-5361-2015 OI Forsyth, V. Trevor/0000-0003-0380-3477; Urban, Volker/0000-0002-7962-3408 NR 10 TC 3 Z9 4 U1 0 U2 5 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 AUG PY 2005 VL 238 IS 1-4 BP 7 EP 15 DI 10.1016/j.nimb.2005.06.010 PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 971NF UT WOS:000232390400003 ER PT J AU Fan, L McNulty, I Paterson, D Treacy, MMJ Gibson, JM AF Fan, L McNulty, I Paterson, D Treacy, MMJ Gibson, JM TI Fluctuation microscopy - a tool for examining medium-range order in noncrystalline systems SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 4th International Conference on Synchrotron Radiation in Materials Science (SRMS-4) CY AUG 23-25, 2004 CL Grenoble, FRANCE DE fluctuation X-ray microscopy; medium-range order; speckle; nanoscale materials and nanostructures ID DISORDERED MATERIALS AB Fluctuation microscopy examines the spatial variations in coherent microdiffraction from an ensemble of small volumes in noncrystalline systems. The variance of scattered intensity into regions of reciprocal space can be used to give insight into three-body and four-body correlation functions, which are sensitive to medium-range order. The technique was originally developed for transmission electron microscopy and was successfully used to understand medium-range order in amorphous silicon and germanium. Applying this method to X-rays, we have developed a new approach: fluctuation X-ray microscopy (FXM). The approach offers quantitative insight into medium-range correlations in materials at nanometer and larger length scales. The FXM technique can be used to explore medium-range order and subtle structural changes in a wide range of disordered materials from soft matter to nanocomposites, nanowire and quantum dot arrays. We have demonstrated this new technique by studying films of polystyrene latex spheres. (c) 2005 Elsevier B.V. All rights reserved. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287 USA. RP Fan, L (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA. EM lfan@aps.anl.gov; jmgibson@aps.anl.gov RI Gibson, Murray/E-5855-2013 OI Gibson, Murray/0000-0002-0807-6224 NR 7 TC 6 Z9 6 U1 0 U2 5 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 AUG PY 2005 VL 238 IS 1-4 BP 196 EP 199 DI 10.1016/j.nimb.2005.06.048 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 971NF UT WOS:000232390400041 ER PT J AU Ridgway, MC Glover, CJ Azevedo, GD Kluth, SM Yu, KM Foran, GJ AF Ridgway, MC Glover, CJ Azevedo, GD Kluth, SM Yu, KM Foran, GJ TI Structure in amorphous semiconductors: Extrinsic and intrinsic SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 4th International Conference on Synchrotron Radiation in Materials Science (SRMS-4) CY AUG 23-25, 2004 CL Grenoble, FRANCE ID MOLECULAR-DYNAMICS SIMULATION; ION-IMPLANTATION; GERMANIUM; CRYSTALLIZATION; GE AB A detailed study of the atomic-scale structure of amorphous semiconductors utilizing Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy is reported. Samples were examined in both extrinsic (preparation specific) and intrinsic (minimum energy) forms. The amorphous elemental semiconductors exhibit structural disorder in the form of both bond-length and bond-angle distortions. As formed, amorphous Ge displays a fabrication-dependent non-Gaussian inter-atomic distance distribution with implantation-induced defects in the amorphous phase accommodated as three- and five-fold coordinated atoms. Thermal annealing yields a reduction in both bond-length and bond-angle distortion, as measured by EXAFS and Raman spectroscopies, respectively, where the total relaxation enthalpy is consistent with differential scanning calorimetry measurements. In a fully-relaxed state, amorphous Ge retains four-fold coordination and the inter-atomic distance distribution is Gaussian and independent of the implanted ion dose. The amorphous compound semiconductors contain chemical disorder in addition to structural disorder. As formed, amorphous compound semiconductors including the Ga and In phosphides and arsenides all exhibit chemical disorder manifested as homopolar bonding. Though low-temperature thermal annealing lessens the Debye-Waller factor and the homopolar bonding fraction, the latter is not eliminated. Point-defect annealing in the form of homopolar bond annihilation is thus operative during structural relaxation of the amorphous phase. Residual chemical disorder necessitates the presence of odd-membered rings and thus demonstrates the elastic energy required to produce a continuous-random-network without homopolar bonding (or equivalently with only even-membered rings) must exceed the Coulomb energy inherent with anion-anion or cation-cation repulsion. (c) 2005 Elsevier B.V. All rights reserved. C1 Australian Natl Univ, Res Sch Phys Sci & Engn, Dept Elect Mat Engn, Canberra, ACT 0200, Australia. Lab Nacl Luz Sincrotron, Campinas, SP, Brazil. Lawrence Berkeley Natl Lab, Berkeley, CA USA. Australian Nucl Sci & Technol Org, Menai, NSW 2234, Australia. RP Ridgway, MC (reprint author), Australian Natl Univ, Res Sch Phys Sci & Engn, Dept Elect Mat Engn, GPO Box 4, Canberra, ACT 0200, Australia. EM mcr109@rsphy1.anu.edu.au RI Yu, Kin Man/J-1399-2012; Ridgway, Mark/D-9626-2011; Azevedo, Gustavo/E-9399-2010 OI Yu, Kin Man/0000-0003-1350-9642; Ridgway, Mark/0000-0002-0642-0108; Azevedo, Gustavo/0000-0003-0301-3280 NR 11 TC 7 Z9 7 U1 1 U2 8 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 AUG PY 2005 VL 238 IS 1-4 BP 294 EP 301 DI 10.1016/j.nimb.2005.06.066 PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 971NF UT WOS:000232390400062 ER PT J AU Chen, J Shao, L Lin, T Liu, JR Chu, WK AF Chen, J Shao, L Lin, T Liu, JR Chu, WK TI The effects of energy non-monochromaticity of B-11 ion beams on B-11 diffusion SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 15th International Conference on Ion Implantation Technology CY OCT 25-27, 2004 CL Taipei, TAIWAN DE shallow junction; boron diffusion; energy contamination ID SILICON; BORON AB We have shown that energy contamination introduced by ion beam deceleration technology that is used to increase the beam currents available for low energy boron implants, can affect fabricated junctions adversely. A 4 keV B-11 beam is extracted and retarded by a potential of -3.5 keV for 0.5 keV B-11 implantation, or by a potential of -3.8 keV for 0.2 keV B-11 implantation. Intentional beam contamination was introduced by turning off the retarding potential to allow the 4 keV B-11 ions to irradiate Si wafers directly. The percentage of contamination, at levels of 0.1%, 0.2% and 0.3% was introduced. Rapid thermal annealing of all the implanted samples was performed under N-2 ambient at 1050 degrees C for 1s. The dopant tail profiles themselves are not significant if the contamination levels are low. However, the much higher damage level coming from high energy contamination increases the transient enhanced diffusion of B-11 more than proportionately, resulting in considerable boron diffusion. Energy contamination at a level of 0.1% can extend the profile of 0.5 keV B-11 implants 10 nm deeper after a 1050 degrees C spike annealing. The study shows a highly monoenergetic beam with energy contamination less than 0.1% is required for sub-micron devices. (c) 2005 Elsevier B.V. All rights reserved. C1 Adv Ion Beam Technol Inc, San Jose, CA 94086 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Houston, Dept Phys, Texas Ctr Superconduct & Adv Mat, Houston, TX 77204 USA. RP Chen, J (reprint author), Adv Ion Beam Technol Inc, 81 Daggett Dr, San Jose, CA 94086 USA. EM jchen@aibt-inc.com NR 8 TC 1 Z9 1 U1 0 U2 1 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 AUG PY 2005 VL 237 IS 1-2 BP 155 EP 159 DI 10.1016/j.nimb.2005.04.091 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 959TU UT WOS:000231543000030 ER PT J AU Brofferio, C Ardito, R Arnaboldi, C Artusa, DR Avignone, FT Balata, M Bandac, I Barucci, M Beeman, JW Bellini, F Bucci, C Capelli, S Capozzi, F Carbone, L Cebrian, S Cosmelli, C Cremonesi, O Creswick, RJ de Waard, A Dolinski, M Farach, HA Ferroni, F Fiorini, E Frossati, G Gargiulo, C Guardincerri, E Giuliani, A Gorla, P Gutierrez, TD Haller, EE Irastorza, IG Longo, E Maier, G Maruyama, R McDonald, RJ Morganti, S Nisi, S Norman, EB Nucciotti, A Olivieri, E Ottonello, P Pallavicini, M Palmieri, V Pasca, E Pavan, M Pedretti, M Pessina, G Pirro, S Previtali, E Quiter, B Risegari, L Rosenfeld, C Sangiorgio, S Sisti, M Smith, AR Toffanin, S Torres, L Ventura, G Xu, N AF Brofferio, C Ardito, R Arnaboldi, C Artusa, DR Avignone, FT Balata, M Bandac, I Barucci, M Beeman, JW Bellini, F Bucci, C Capelli, S Capozzi, F Carbone, L Cebrian, S Cosmelli, C Cremonesi, O Creswick, RJ de Waard, A Dolinski, M Farach, HA Ferroni, F Fiorini, E Frossati, G Gargiulo, C Guardincerri, E Giuliani, A Gorla, P Gutierrez, TD Haller, EE Irastorza, IG Longo, E Maier, G Maruyama, R McDonald, RJ Morganti, S Nisi, S Norman, EB Nucciotti, A Olivieri, E Ottonello, P Pallavicini, M Palmieri, V Pasca, E Pavan, M Pedretti, M Pessina, G Pirro, S Previtali, E Quiter, B Risegari, L Rosenfeld, C Sangiorgio, S Sisti, M Smith, AR Toffanin, S Torres, L Ventura, G Xu, N TI CUORICINO status and CUORE prospects SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT Neutrino Oscillation Workshop CY SEP 11-17, 2004 CL Otranto, ITALY SP Univ Lecce, Dipartimento Fis Lecce, Univ Bari, Dipartimento Fis Bari, Ist Nazl Fis Nucl, Univ Ric, Minist Istruzione, European Network theoret Astroparticle Phys ID DOUBLE-BETA DECAY; TE-130 AB CUORE is a proposed experiment, already partially funded, to search for 0v-DBD of Te-130 using 988 TeO2 bolometers. It aims at reaching a sensitivity on the effective neutrino mass of the order of few tens of meV. The crucial parameter on which this expectation is based is background. Different strategies are under development to reduce as much as possible its value, among which the comprehension of CUORICINO background, a single CUORE tower running since 2003, plays an important role. Present results already achieved and studies that are underway are here presented and discussed. C1 Univ Milan, Dipartimento Fis, I-20126 Milan, Italy. Ist Nazl Fis Nucl, Sez Milano, I-20126 Milan, Italy. Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA. Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67010 Assergi, AQ, Italy. Univ Florence, Dipartimento Fis, I-50125 Florence, Italy. Ist Nazl Fis Nucl, Sez Firenze, I-50125 Florence, Italy. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Rome, Dipartimento Fis, I-16146 Genoa, Italy. Ist Nazl Fis Nucl, Sez Roma 1, I-16146 Genoa, Italy. Univ Zaragoza, Lab Fis Nucl & Alta Energias, E-50009 Zaragoza, Spain. Leiden Univ, Kamerlingh Onnes Lab, NL-2300 RA Leiden, Netherlands. Univ Calif Berkeley, Dept Mat Sci & Mineral Engn, Berkeley, CA 94720 USA. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy. Univ Insubria, Dipartimento Matemat & Fis, I-22100 Como, Italy. Ist Nazl Fis Nucl, Sez Milano, I-22100 Como, Italy. Politecn Milan, Dipartimento Ingn Strutt, I-20133 Milan, Italy. Livermore Natl Lab, Berkeley, CA 94720 USA. Lab Nazl Legnaro, I-35020 Legnaro, PD, Italy. RP Brofferio, C (reprint author), Univ Milan, Dipartimento Fis, I-20126 Milan, Italy. RI Bellini, Fabio/D-1055-2009; Irastorza, Igor/B-2085-2012; Pallavicini, Marco/G-5500-2012; Nucciotti, Angelo/I-8888-2012; Gorla, Paolo/B-5243-2014; Sangiorgio, Samuele/F-4389-2014; Toffanin, Stefano/N-7651-2015; Barucci, Marco/D-4209-2012; Sisti, Monica/B-7550-2013; capelli, silvia/G-5168-2012; OI ARDITO, RAFFAELE/0000-0002-4271-9190; pavan, maura/0000-0002-9723-7834; Pessina, Gianluigi Ezio/0000-0003-3700-9757; Bellini, Fabio/0000-0002-2936-660X; Irastorza, Igor/0000-0003-1163-1687; Pallavicini, Marco/0000-0001-7309-3023; Nucciotti, Angelo/0000-0002-8458-1556; Sangiorgio, Samuele/0000-0002-4792-7802; Toffanin, Stefano/0000-0003-4099-8664; Gutierrez, Thomas/0000-0002-0330-6414; Barucci, Marco/0000-0003-0381-3376; Sisti, Monica/0000-0003-2517-1909; capelli, silvia/0000-0002-0300-2752; Longo, Egidio/0000-0001-6238-6787 NR 5 TC 6 Z9 6 U1 0 U2 1 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 AUG PY 2005 VL 145 BP 268 EP 271 DI 10.1016/j.nuclphysbps.2005.04.020 PG 4 WC Physics, Particles & Fields SC Physics GA 935AR UT WOS:000229751700057 ER PT J AU Cardall, CY AF Cardall, CY TI Supernova neutrino challenges SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT Neutrino Oscillation Workshop CY SEP 11-17, 2004 CL Otranto, ITALY SP Univ Lecce, Dipartimento Fis Lecce, Univ Bari, Dipartimento Fis Bari, Ist Nazl Fis Nucl, Univ Ric, Minist Istruzione, European Network theoret Astroparticle Phys ID CORE-COLLAPSE SUPERNOVAE; RADIATION HYDRODYNAMICS; DIFFUSIVE INSTABILITIES; NUMERICAL-MODEL; TRANSPORT; SHOCK; CONVECTION; MECHANISM; BOLTZMANN; MULTIGROUP AB A principal supernova neutrino challenge' is the computational difficulty of six-dimensional neutrino radiation hydrodynamics. The variety of resulting approximations has provoked a long history of uncertainty in the core-collapse supernova explosion mechanism, but recent work highlighting low-mode convection and a newly-recognized instability in spherical accretion shocks may signal (yet another) resolution. As part of its goal of elucidating the explosion mechanism, the Terascale Supernova Initiative is committed to meeting the full complexity, of the computational challenge. The understanding of supernova neutrino emission gained in detailed simulations provides a potential basis for learning about two major remaining unknowns in neutrino flavor mixing: the value of the mixing angle theta(13), and distinguishing between "normal" and "inverted" mass hierarchies. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. RP Cardall, CY (reprint author), Oak Ridge Natl Lab, Div Phys, POB 2008, Oak Ridge, TN 37831 USA. NR 53 TC 4 Z9 4 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 AUG PY 2005 VL 145 BP 295 EP 300 DI 10.1016/j.nuclphysbps.2005.04.026 PG 6 WC Physics, Particles & Fields SC Physics GA 935AR UT WOS:000229751700063 ER PT J AU Bernardini, E AF Bernardini, E CA AMANDA Collaboration TI New results from the AMANDA neutrino telescope SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT Neutrino Oscillation Workshop CY SEP 11-17, 2004 CL Otranto, ITALY SP Univ Lecce, Dipartimento Fis Lecce, Univ Bari, Dipartimento Fis Bari, Ist Nazl Fis Nucl, Univ Ric, Minist Istruzione, European Network theoret Astroparticle Phys ID SPECTRA; SEARCH AB The Antarctic Muon and Neutrino Detector Array (AMANDA) is a Cerenkov telescope which uses the south polar ice cap to search for neutrinos from extraterrestrial sources. We present a preliminary reconstruction of the energy spectrum of atmospheric neutrinos above a few TeV and several recent results on searches for high-energy astrophysical neutrinos, both non-localized and emitted by point-like sources. C1 DESY, D-15735 Zeuthen, Germany. Univ Mainz, Inst Phys, D-55099 Mainz, Germany. Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany. Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA. Berg Univ Gesamthsch Wuppertal, Fachbereich Phys 8, D-42097 Wuppertal, Germany. Univ Libre Bruxelles, Fac Sci, Brussels, Belgium. Univ Uppsala, Div High Energy Phys, S-75121 Uppsala, Sweden. Univ Wisconsin, Dept Phys, Madison, WI 53706 USA. Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden. Univ Mons, B-7000 Mons, Belgium. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Penn State Univ, Dept Phys, University Pk, PA 16802 USA. Univ Maryland, Dept Phys, College Pk, MD 20742 USA. Vrije Univ Brussels, Dienst ELEM, B-1050 Brussels, Belgium. Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, England. Univ Wisconsin, Dept Phys, River Falls, WI 54022 USA. RP Bernardini, E (reprint author), DESY, D-15735 Zeuthen, Germany. RI Hundertmark, Stephan/A-6592-2010; Hallgren, Allan/A-8963-2013; Wiebusch, Christopher/G-6490-2012; OI Wiebusch, Christopher/0000-0002-6418-3008; Perez de los Heros, Carlos/0000-0002-2084-5866; Kampert, Karl-Heinz/0000-0002-2805-0195; Hubert, Daan/0000-0002-4365-865X NR 17 TC 3 Z9 3 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 AUG PY 2005 VL 145 BP 319 EP 322 DI 10.1016/j.nuclphysbps.2005.04.030 PG 4 WC Physics, Particles & Fields SC Physics GA 935AR UT WOS:000229751700067 ER PT J AU Rearden, BT Anderson, WJ Harms, GA AF Rearden, BT Anderson, WJ Harms, GA TI Use of sensitivity and uncertainty analysis in the design of reactor physics and criticality benchmark experiments for advanced nuclear fuel SO NUCLEAR TECHNOLOGY LA English DT Article; Proceedings Paper CT Topical Meeting of the American-Nuclear-Society on Advances in Nuclear Fuel Management III CY OCT 05-08, 2003 CL Hilton Head Isl, SC SP Amer Nucl Soc DE sensitivity and uncertainty analysis; experiment design; highly enriched fuel ID VALIDATION AB Framatome ANP, Sandia National Laboratories (SNL), Oak Ridge National Laboratory (ORNL), and the University of Florida are cooperating on the U.S. Department of Energy Nuclear Energy Research Initiative (NERI) project 2001-0124 to design, assemble, execute, analyze, and document a series of critical experiments to validate reactor physics and criticality safety codes for the analysis of commercial power reactor fuels consisting Of UO2 with U-235 enrichments >= 5 wt%. The experiments will be conducted at the SNL Pulsed Reactor Facility. Framatome ANP and SNL produced two series of conceptual experiment designs based on typical parameters, such as fuel-to-moderator ratios, that meet the programmatic requirements of this project within the given restraints on available materials and facilities. ORNL used the Tools for Sensitivity and Uncertainty Analysis Methodology implementation (TSUNAMI) to assess, from a detailed physics-based perspective, the similarity of the experiment designs to the commercial systems they are intended to validate. Based on the results of the TSUNAMI analysis, one series of experiments was found to be preferable to the other and will provide significant new data for the validation of reactor physics and criticality safety codes. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Framatome ANP Inc, Lynchburg, VA 24506 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Rearden, BT (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. EM reardenb@ornl.gov NR 9 TC 4 Z9 4 U1 0 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 AUG PY 2005 VL 151 IS 2 BP 133 EP 158 PG 26 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 944MV UT WOS:000230434000005 ER PT J AU Todosow, M Galperin, A Herring, S Kazimi, M Downar, T Morozov, A AF Todosow, M Galperin, A Herring, S Kazimi, M Downar, T Morozov, A TI Use of thorium in light water reactors SO NUCLEAR TECHNOLOGY LA English DT Article; Proceedings Paper CT Topical Meeting of the American-Nuclear-Society on Advances in Nuclear Fuel Management III CY OCT 05-08, 2003 CL Hilton Head Isl, SC SP Amer Nucl Soc DE thorium; light water reactors; fuel cycle ID PLUTONIUM; FUEL AB Thorium-based fuels can be used to reduce concerns related to the proliferation potential and waste disposal of the conventional light water reactor (LWR) uranium fuel cycle. The main sources of proliferation potential and radiotoxicity are the plutonium and higher actinides generated during the burnup of standard LWR fuel. A significant reduction in the quantity and quality of the generated Pu can be achieved by replacing the U-238 fertile component of conventional low-enriched uranium fuel by Th-232. Thorium can also be used as a way to manage the growth of plutonium stockpiles by burning plutonium, or achieving a net-Zero transuranic production, sustainable recycle scenario. This paper summarizes some of the results of recent studies of the performance of thorium-based fuels. It is concluded that the use of heterogeneous U-Th fuel provides higher neutronic potential than a homogeneous fuel. However, in the former case, the uranium portion of the fuel operates at a higher power density, and care is needed to meet the thermal margins and address the higher-burnup implications. In macro-heterogeneous designs, the U-Th fuel can yield reduced spent-fuel volume, toxicity, and decay heat. The main advantage of Pu-Th oxide over mixed oxide is better void reactivity behavior even for undermoderated designs, and increased burnup of Pu. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Ben Gurion Univ Negev, IL-84105 Beer Sheva, Israel. Idaho Natl Engn & Environm Lab, Idaho Falls, ID USA. MIT, Cambridge, MA 02139 USA. Purdue Univ, W Lafayette, IN 47907 USA. Kurchatov Inst, Russian Res Ctr, Moscow, Russia. RP Todosow, M (reprint author), Brookhaven Natl Lab, POB 5000, Upton, NY 11973 USA. EM todosowm@bnl.gov NR 21 TC 11 Z9 11 U1 2 U2 11 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 AUG PY 2005 VL 151 IS 2 BP 168 EP 176 PG 9 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 944MV UT WOS:000230434000007 ER PT J AU Greenspan, E Hejzlar, P Sekimoto, H Toshinsky, G Wade, D AF Greenspan, E Hejzlar, P Sekimoto, H Toshinsky, G Wade, D TI New fuel cycle and fuel management options in heavy liquid metal-cooled reactors SO NUCLEAR TECHNOLOGY LA English DT Article; Proceedings Paper CT Topical Meeting of the American-Nuclear-Society on Advances in Nuclear Fuel Management III CY OCT 05-08, 2003 CL Hilton Head Isl, SC SP Amer Nucl Soc DE deep burn; nuclear battery; sustainable energy ID DESIGN; PERFORMANCE; STRATEGY AB Fast reactors cooled by lead or lead-bismuth alloy offer new interesting fuel cycle and fuel management options by virtue of the superb neutronics and safety features of these heavy liquid metal (HLM) coolants. One option is once-for-life cores having relatively low power density. These cores are fueled in the factory; there is no refueling or fuel shuffling on site. A second option is very long-life cores being made of a fissioning zone and a natural uranium blanket zone. The fissioning zone very slowly drifts toward the blanket. A third option is multirecycling of light water reactor (LWR) discharged fuel without partitioning of transuranics (TRUs) in fuel-self-sustaining reactors. LWR spent fuel could provide the initial fuel loading after extracting fission products and similar to 90% of its uranium. The makeup fuel is natural or depleted uranium. A fourth option is the high-burnup once-through fuel cycle using natural or depleted uranium feed. The initial fuel loading of this reactor is a mixture of enriched and natural uranium. The natural uranium utilization is 10 to 20 times higher than that of a once-through LWR. A fifth option is transmutation of TRUs from LWRs using critical HLM-cooled reactors; such reactors could be designed to have the same high actinide burning capability of accelerator-driven systems and have comparable safety, but at a substantially lower cost. These novel reactor designs and fuel management options are hereby reviewed. C1 Univ Calif Berkeley, Berkeley, CA 94720 USA. MIT, Cambridge, MA 02139 USA. Tokyo Inst Technol, Tokyo 152, Japan. Inst Phys & Power Engn, Obninsk, Russia. Argonne Natl Lab, Argonne, IL 60439 USA. RP Greenspan, E (reprint author), Univ Calif Berkeley, Berkeley, CA 94720 USA. EM gehud@nuc.berkeley.edu NR 47 TC 7 Z9 7 U1 0 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 AUG PY 2005 VL 151 IS 2 BP 177 EP 191 PG 15 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 944MV UT WOS:000230434000008 ER PT J AU Williams, PT Satariano, WA AF Williams, PT Satariano, WA TI Relationships of age and weekly running distance to BMI and circumferences in 41,582 physically active women SO OBESITY RESEARCH LA English DT Article DE physical activity; running; aging; BMI; regional adiposity ID BODY-FAT DISTRIBUTION; TERM WEIGHT CHANGE; ADIPOSE-TISSUE; PROSPECTIVE POPULATION; MENOPAUSE TRANSITION; POSTMENOPAUSAL WOMEN; ENERGY-EXPENDITURE; NATIONAL COHORT; OVERWEIGHT MEN; EXERCISE TRIAL AB Objective: To assess in women whether age-related increases in adiposity are dependent on exercise, and, contrariwise, whether exercise-related declines in adiposity are dependent on age. Research Methods and Procedures: Cross-sectional analyses were conducted of 41,582 female runners. Results: Age affected the relationships between vigorous exercise and adiposity. The decline in BMI per kilometer per week run was linear in 18 to 23 year Olds and became increasingly non-linear (convex) with age. Waist, hip, and chest circumferences declined significantly with running distance across all age groups, but the declines were significantly greater in older than younger women, particularly among shorter distance runners. The relationships between body circumferences and running distance became increasingly convex in older women. Conversely, vigorous exercise diminished the apparent increase in adiposity with age. The increase in average BMI with age was greatest in women who ran < 8 km/wk, intermediate in women who ran 8 to 15 km/wk or 16 to 31 km/wk, and least in those who averaged over 32 km/wk. Before age 45, waist circumference rose for those who ran 0 to 7 km/wk, showed no significant relationship to age for those who ran 8 to 39 km/wk, and declined in those who ran 40 to 55 and 56 km/wk and more. Age related-increases in hip and chest circumferences before 45 years old were significantly less in women who ran longer weekly distances. Discussion: These cross-sectional associations are consistent with the hypothesis that exercise may mitigate age-related increases in adiposity and that age affects exercise-induced reductions in adiposity (although causality remains to be determined experimentally). C1 Lawrence Berkeley Lab, Div Life Sci, Donner Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Sch Publ Hlth, Berkeley, CA 94720 USA. RP Williams, PT (reprint author), Lawrence Berkeley Lab, Div Life Sci, Donner Lab, Berkeley, CA 94720 USA. EM ptwilliams@lbl.gov FU NHLBI NIH HHS [HL-072110, HL-45652]; NIDDK NIH HHS [DK066738] NR 56 TC 17 Z9 18 U1 3 U2 5 PU NORTH AMER ASSOC STUDY OBESITY PI SILVER SPRING PA 8630 FENTON ST, SUITE 918, SILVER SPRING, MD 20910 USA SN 1071-7323 J9 OBES RES JI Obes. Res. PD AUG PY 2005 VL 13 IS 8 BP 1370 EP 1380 DI 10.1038/oby.2005.166 PG 11 WC Endocrinology & Metabolism; Nutrition & Dietetics SC Endocrinology & Metabolism; Nutrition & Dietetics GA 963XD UT WOS:000231838700012 PM 16129719 ER PT J AU McDowell, NG Licata, J Bond, BJ AF McDowell, NG Licata, J Bond, BJ TI Environmental sensitivity of gas exchange in different-sized trees SO OECOLOGIA LA English DT Article DE Douglas-fir; carbon isotope discrimination; hydraulic limitation; old-growth; Pseudotsuga menziesii var. menziesii; stomatal conductance ID CARBON ISOTOPE DISCRIMINATION; AGE-RELATED DECLINE; GROWTH DOUGLAS-FIR; HYDRAULIC CONDUCTANCE; STOMATAL CONDUCTANCE; PONDEROSA PINE; WATER-USE; CO2 DIFFUSION; FOREST PRODUCTIVITY; PACIFIC-NORTHWEST AB The carbon isotope signature (delta(13)C) of foliar cellulose from sunlit tops of trees typically becomes enriched as trees of the same species in similar environments grow taller, indicative of size-related changes in leaf gas exchange. However, direct measurements of gas exchange in common environmental conditions do not always reveal size-related differences, even when there is a distinct size-related trend in delta(13)C of the very foliage used for the gas exchange measurements. Since delta(13)C of foliage predominately reflects gas exchange during spring when carbon is incorporated into leaf cellulose, this implies that gas exchange differences in different-sized trees are most likely to occur in favorable environmental conditions during spring. If gas exchange differs with tree size during wet but not dry conditions, then this further implies that environmental sensitivity of leaf gas exchange varies as a function of tree size. These implications are consistent with theoretical relationships among height, hydraulic conductance and gas exchange. We investigated the environmental sensitivity of gas exchange in different-sized Douglas-fir (Pseudotsuga menziesii) via a detailed process model that specifically incorporates size-related hydraulic conductance [soil-plant-atmosphere (SPA)], and empirical measurements from both wet and dry periods. SPA predicted, and the empirical measurements verified, that differences in gas exchange associated with tree size are greatest in wet and mild environmental conditions and minimal during drought. The results support the hypothesis that annual net carbon assimilation and transpiration of trees are limited by hydraulic capacity as tree size increases, even though at particular points in time there may be no difference in gas exchange between different-sized trees. Maximum net ecosystem exchange occurs in spring in Pacific Northwest forests; therefore, the presence of hydraulic limitations during this period may play a large role in carbon uptake differences with stand-age. The results also imply that the impacts of climate change on the growth and physiology of forest trees will vary depending on the age and size of the forest. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Oregon State Univ, Dept Forest Sci, Corvallis, OR 97331 USA. RP McDowell, NG (reprint author), Los Alamos Natl Lab, MS-D462, Los Alamos, NM 87545 USA. EM mcdowell@lanl.gov NR 69 TC 46 Z9 47 U1 2 U2 22 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0029-8549 J9 OECOLOGIA JI Oecologia PD AUG PY 2005 VL 145 IS 1 BP 9 EP 20 DI 10.1007/s00442-005-0104-6 PG 12 WC Ecology SC Environmental Sciences & Ecology GA 963CC UT WOS:000231779500002 PM 15959823 ER PT J AU Rudd, JV Law, RJ Luk, TS Cameron, SM AF Rudd, JV Law, RJ Luk, TS Cameron, SM TI High-power optical parametric chirped-pulse amplifier system with a 1.55 mu m signal and a 1.064 mu m pump SO OPTICS LETTERS LA English DT Article ID AMPLIFICATION; GENERATION; MODE AB We have designed and built a chirped-pulse parametric-amplifier system that utilizes a 10 Hz, 300 ps, Nd:YAG pump laser system; a 1.575 mu m fiber oscillator and amplifier as the signal source; and rubidium titanyl phosphate and potassium titanyl arsenate nonlinear crystals. We obtained 260 fs, 30 mJ pulses centered at 1.550 mu m, representing a gain of > 10(9) and a peak power of 100 GW. To our knowledge, these are the highest energy and peak power pulses ever produced in the 1.5-2.0 mu m region (c) 2005 Optical Society of America. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Rudd, JV (reprint author), Sandia Natl Labs, POB 5800,MS 1153, Albuquerque, NM 87185 USA. EM jvrudd@sandia.gov NR 14 TC 25 Z9 25 U1 0 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 AUG 1 PY 2005 VL 30 IS 15 BP 1974 EP 1976 DI 10.1364/OL.30.001974 PG 3 WC Optics SC Optics GA 948KJ UT WOS:000230714400020 PM 16092237 ER PT J AU Leyffer, S AF Leyffer, S TI The penalty interior-point method fails to converge SO OPTIMIZATION METHODS & SOFTWARE LA English DT Article; Proceedings Paper CT Scientific Meeting on Numerical Methods for Local and Global Optimization CY JUL 14-20, 2003 CL Cortona, ITALY SP Italian Ist Nazl Alta Matemat Francesco Severi DE nonlinear programming; interior-point methods; PIPA; MPEC; MPCC; equilibrium constraints ID MATHEMATICAL PROGRAMS; COMPLEMENTARITY CONSTRAINTS; EQUILIBRIUM CONSTRAINTS; MPEC APPROACH AB Equilibrium equations in the form of complementarity conditions often appear as constraints in optimization problems. Problems of this type are commonly referred to as mathematical programs with complementarity constraints (MPCCs). A popular method for solving MPCCs is the penalty interior-point algorithm (PIPA). This paper presents an example for which PIPA converges to a nonstationary point, providing a counterexample to the established theory. The reasons for this adverse behavior are discussed. C1 Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. RP Leyffer, S (reprint author), Argonne Natl Lab, Div Math & Comp Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. EM leyffer@mcs.anl.gov NR 21 TC 3 Z9 3 U1 0 U2 2 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1055-6788 J9 OPTIM METHOD SOFTW JI Optim. Method Softw. PD AUG-OCT PY 2005 VL 20 IS 4-5 BP 559 EP 568 DI 10.1080/10556780500140078 PG 10 WC Computer Science, Software Engineering; Operations Research & Management Science; Mathematics, Applied SC Computer Science; Operations Research & Management Science; Mathematics GA 981KQ UT WOS:000233087900011 ER PT J AU Cole, TB Walter, BJ Shih, DM Tward, AD Lusis, AJ Timchalk, C Richter, RJ Costa, LG Furlong, CE AF Cole, TB Walter, BJ Shih, DM Tward, AD Lusis, AJ Timchalk, C Richter, RJ Costa, LG Furlong, CE TI Toxicity of chlorpyrifos and chlorpyrifos oxon in a transgenic mouse model of the human paraoxonase (PON1) Q192R polymorphism SO PHARMACOGENETICS AND GENOMICS LA English DT Article DE paraoxonase; PON1; chlorpyrifos; chlorpyrifos oxon; mice ID PHARMACODYNAMIC PBPK/PD MODEL; SERUM PARAOXONASE; MUSCARINIC RECEPTORS; PESTICIDE EXPOSURE; MOLECULAR-BASIS; A-ESTERASE; GENE; ARYLESTERASE; EXPRESSION; MICE AB Objectives The Q192R polymorphism of paraoxonase (PON1) has been shown to affect hydrolysis of organophosphorus compounds. The Q192 and R192 alloforms exhibit equivalent catalytic efficiencies of hydrolysis for diazoxon, the oxon form of the pesticide (DZ). However, the R192 alloform has a higher catalytic efficiency of hydrolysis than does the Q192 alloform for chlorpyrifos oxon (CPO), the oxon form of the pesticide chlorpyrifos (CPS). The current study examined the relevance of these observations for in-vivo exposures to chlorpyrifos and chlorpyrifos oxon. Methods Using a transgenic mouse model we examined the relevance of the Q192R polymorphism for exposure to CPS and CPO in vivo. Transgenic mice were generated that expressed either human PON1(Q192) or PON1(R192) at equivalent levels, in the absence of endogenous mouse PON1. Dose-response and time course experiments were performed on adult mice exposed dermally to CPS or CPO. Morbidity and acetylcholinesterase (AChE) activity in the brain and diaphragm were determined in the first 24 h following exposure. Results Mice expressing PON1(Q192) were significantly more sensitive to CPO, and to a lesser extent CPS, than were mice expressing PON1(R192). The time course of inhibition following exposure to 1.2 mg/kg CPO revealed maximum inhibition of brain AChE at 6-12 h, with PON1(R192), PON1(Q192), and PON1(-/-) mice exhibiting 40, 70 and 85% inhibition, respectively, relative to control mice. The effect of PON1 removal on the dose-response curve for CPS exposure was remarkably consistent with a PBPK/PD model of CPS exposure. Conclusion These results indicate that individuals expressing only the PON1(Q192) allele would be more sensitive to the adverse effects of CPO or CPS exposure, especially if they are expressing a low level of plasma PON1(Q192). C1 Univ Washington, Div Med Genet, Dept Med, Seattle, WA 98195 USA. Univ Washington, Dept Environm & Occupat Hlth Sci, Seattle, WA 98195 USA. Univ Washington, Dept Genome Sci, Seattle, WA 98195 USA. Univ Calif Los Angeles, Sch Med, Dept Microbiol & Mol Genet, Los Angeles, CA USA. Univ Calif Los Angeles, Sch Med, Dept Med, Div Cardiol, Los Angeles, CA 90024 USA. Univ Calif San Francisco, George Williams Hooper Fdn, San Francisco, CA 94143 USA. Battelle Mem Inst, Pacific NW Div, Ctr Biol Monitoring & Modeling, Richland, WA USA. RP Furlong, CE (reprint author), Univ Washington, Div Med Genet, Dept Med, Box 357720, Seattle, WA 98195 USA. EM clem@u.washington.edu FU NHLBI NIH HHS [P01 HL30568]; NIA NIH HHS [T32-AG00057]; NIEHS NIH HHS [ES09883, ES04696, ES-09601, ES07033, U19 ES11387]; NIOSH CDC HHS [5 R01 OH003629-03]; PHS HHS [R826886] NR 45 TC 64 Z9 68 U1 0 U2 3 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 1744-6872 J9 PHARMACOGENET GENOM JI Pharmacogenet. Genomics PD AUG PY 2005 VL 15 IS 8 BP 589 EP 598 DI 10.1097/01.fpc.0000167327.08034.d2 PG 10 WC Biotechnology & Applied Microbiology; Genetics & Heredity; Pharmacology & Pharmacy SC Biotechnology & Applied Microbiology; Genetics & Heredity; Pharmacology & Pharmacy GA 954QK UT WOS:000231169400008 PM 16007003 ER PT J AU Lucadamo, G Medlin, DL Yang, NYC Kelly, JJ Talin, AA AF Lucadamo, G Medlin, DL Yang, NYC Kelly, JJ Talin, AA TI Characterization of twinning in electrodeposited Ni-Mn alloys SO PHILOSOPHICAL MAGAZINE LA English DT Article ID NICKEL ELECTRODEPOSITS; MECHANICAL-PROPERTIES; ACCOMMODATION PROCESSES; ELECTRON-MICROSCOPY; GRAIN-BOUNDARIES; MICROSTRUCTURE; DISTRIBUTIONS; INTERFACES; CRYSTALS; DIAMOND AB Twinning is ubiquitous in electroplated metals. Here, we identify and discuss unique aspects of twinning found in electrodeposited Ni-Mn alloys. Previous reports concluded that the twin boundaries effectively refine the grain size, which enhances mechanical strength. Quantitative measurements from transmission electron microscopy (TEM) images show that the relative boundary length in the as-plated microstructure primarily comprises twin interfaces. Detailed TEM characterization reveals a range of length scales associated with twinning beginning with colonies (similar to 1000 nm) down to the width of individual twins, which is typically < 50 nm. We also consider the connection between the crystallographic texture of the electrodeposit and the orientation of the twin planes with respect to the plating direction. The Ni-Mn alloy deposits in this work possess a {110}-fiber texture. While twinning can occur on {111} planes either perpendicular or oblique to the plating direction in {110}- oriented grains, plan-view TEM images show that twins form primarily on those planes parallel to the plating direction. Therefore, grains enclosed by twins and multiply twinned particles are produced. Another important consequence of a high twin density is the formation of large numbers of twin-related junctions. We measure an area density of twin junctions that is comparable to the density of dislocations in a heavily cold-worked metal. C1 Sandia Natl Labs, Ctr Mat Sci & Engn, Livermore, CA 94551 USA. RP Medlin, DL (reprint author), Sandia Natl Labs, Ctr Mat Sci & Engn, POB 969, Livermore, CA 94551 USA. EM dlmedli@sandia.gov NR 38 TC 16 Z9 16 U1 0 U2 18 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 AUG 1 PY 2005 VL 85 IS 22 BP 2549 EP 2560 DI 10.1080/14786430500079363 PG 12 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 949XF UT WOS:000230821500005 ER PT J AU Marquis, EA Medlin, DL AF Marquis, EA Medlin, DL TI Structural duality of 1/3 < 111 > twin-boundary disconnections SO PHILOSOPHICAL MAGAZINE LETTERS LA English DT Article ID TRANSMISSION ELECTRON-MICROSCOPY; GRAIN-BOUNDARIES; DISLOCATIONS; INTERFACES; ALUMINUM; SURFACES; DEFECTS; METALS; STEPS; GOLD AB We investigate the structure of 1/3 [111] disconnections at Sigma 3 {111} twin boundaries in gold. Our high-resolution transmission electron microscopy (HREM) observations and atomistic simulations show that the core relaxation of this defect is dramatically affected by reversing the sign of the Burgers vector, as oriented with respect to the twin boundary. In particular, we find two distinct, relaxed structures: one with a localized core and the other with a dissociated core composed of a stacking fault terminated by a Shockley partial dislocation. An analysis of the specific pathways available for the defect to relax and of the elastic interactions of the components of the dissociated dislocation for these cases explains the structural difference. C1 Sandia Natl Labs, Dept Mat Phys, Livermore, CA 94550 USA. RP Marquis, EA (reprint author), Sandia Natl Labs, Dept Mat Phys, Livermore, CA 94550 USA. EM emarqui@sandia.gov RI Marquis, Emmanuelle/O-5647-2014 OI Marquis, Emmanuelle/0000-0002-6476-2835 NR 19 TC 8 Z9 8 U1 2 U2 12 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0950-0839 J9 PHIL MAG LETT JI Philos. Mag. Lett. PD AUG PY 2005 VL 85 IS 8 BP 387 EP 394 DI 10.1080/09500830500311697 PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 981VH UT WOS:000233115600001 ER PT J AU Mong, GM Harvey, SD Campbell, JA AF Mong, GM Harvey, SD Campbell, JA TI Synthesis of alkyl methylphosphonic acid esters SO PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS LA English DT Article DE cyclohexyl methylphosphonic acid; isopropyl methyphosphonic acid; methylphosphonic dichloride AB A synthesis and isolation scheme is described for producing mono alkyl esters of methylphosphonic acid based upon stoichiometric addition of alcohol to methylphosphonic dichloride. Solvent extraction is applied to the reaction mixture to separate the monoalkyl esters in reasonable yield from dialkyl methylphosphonate and unsubstituted methylphosphonic acid. The single-alkylated materials are important hydrolysis products of the G-series nerve agents, and are not generally available from chemical suppliers. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Mong, GM (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM g.mong@pnl.gov NR 9 TC 2 Z9 2 U1 2 U2 2 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1042-6507 J9 PHOSPHORUS SULFUR JI Phosphorus Sulfur Silicon Relat. Elem. PD AUG PY 2005 VL 180 IS 8 BP 1885 EP 1891 DI 10.1080/104265090889602 PG 7 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA 947LX UT WOS:000230648100013 ER PT J AU Dylla, HF Comeliussen, ST AF Dylla, HF Comeliussen, ST TI Free-electron lasers come of age SO PHOTONICS SPECTRA LA English DT Article C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA USA. RP Dylla, HF (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA USA. NR 3 TC 1 Z9 1 U1 0 U2 0 PU LAURIN PUBL CO INC PI PITTSFIELD PA BERKSHIRE COMMON PO BOX 1146, PITTSFIELD, MA 01202 USA SN 0731-1230 J9 PHOTON SPECTRA JI Photon. Spect. PD AUG PY 2005 VL 39 IS 8 BP 62 EP 68 PG 7 WC Optics SC Optics GA 953LG UT WOS:000231077200016 ER PT J AU Wilke, RHT Bud'ko, SL Canfield, PC Finnemore, DK Suplinskas, RJ Hannahs, ST AF Wilke, RHT Bud'ko, SL Canfield, PC Finnemore, DK Suplinskas, RJ Hannahs, ST TI Synthesis and optimization of Mg(B1-xCx)(2) wire segments SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS LA English DT Article DE MgB2; carbon doping; upper critical field ID CRITICAL-CURRENT DENSITY; CARBON-SUBSTITUTED MGB2; MAGNESIUM DIBORIDE; SINGLE-CRYSTALS; BULK MGB2; SUPERCONDUCTIVITY; CHEMISTRY AB We have succeeded in increasing the upper critical field of polycrystalline MgB2 wire segments to near 36 T by the substitution of 5.2% carbon for boron. We present fabrication details and physical properties of Mg(B1-xCx)(2) for x up to 0.052. Carbon doping was achieved using a two step reaction technique which involved an initial carbon doping of boron wire segments using chemical vapor deposition (CVD) followed by exposure of the carbon doped boron segments to magnesium vapor. The carbon content was determined by the relative contraction of the a-lattice parameter. The superconducting transition temperature is suppressed by approximately 1 K/%C while H-c2(perpendicular to c)(T = 0) rises at a rate of nearly 4 T/%C. Published by Elsevier B.V. C1 Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. Specialty Mat Inc, Lowell, MA 01851 USA. Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA. RP Wilke, RHT (reprint author), Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA. EM wilke@iastate.edu RI Hannahs, Scott/B-1274-2008; Canfield, Paul/H-2698-2014 OI Hannahs, Scott/0000-0002-5840-7714; NR 38 TC 58 Z9 58 U1 3 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD AUG 1 PY 2005 VL 424 IS 1-2 BP 1 EP 16 DI 10.1016/j.physc.2005.04.016 PG 16 WC Physics, Applied SC Physics GA 949RL UT WOS:000230805700001 ER PT J AU Colgan, J Pindzola, MS Robicheaux, F AF Colgan, J Pindzola, MS Robicheaux, F TI Double and triple photoionization of Li and Be SO PHYSICAL REVIEW A LA English DT Article ID DIFFERENTIAL CROSS-SECTIONS; PHOTO-DOUBLE-IONIZATION; HELIUM; LITHIUM AB We present calculations for the double photoionization (with excitation) and the triple photoionization of Li and Be. We extend and more fully discuss the previous calculations made for Li by Colgan [Phys. Rev. Lett. 93, 053201 (2004)] and present calculations for Be. The Be triple photoionization cross sections are compared with previous double shake-off model calculations of Kheifets and Bray [J. Phys. B 36, L211 (2003)], and our calculations are found to be significantly lower. C1 Los Alamos Natl Lab, Theoret Div, Los Alamos, NM 87545 USA. Auburn Univ, Dept Phys, Auburn, AL 36849 USA. RP Colgan, J (reprint author), Los Alamos Natl Lab, Theoret Div, Los Alamos, NM 87545 USA. OI Colgan, James/0000-0003-1045-3858 NR 25 TC 30 Z9 30 U1 1 U2 8 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD AUG PY 2005 VL 72 IS 2 AR 022727 DI 10.1103/PhysRevA.72.022727 PG 7 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 960BC UT WOS:000231564200120 ER PT J AU Graf, MT Kimball, DF Rochester, SM Kerner, K Wong, C Budker, D Alexandrov, EB Balabas, MV Yashchuk, VV AF Graf, MT Kimball, DF Rochester, SM Kerner, K Wong, C Budker, D Alexandrov, EB Balabas, MV Yashchuk, VV TI Relaxation of atomic polarization in paraffin-coated cesium vapor cells SO PHYSICAL REVIEW A LA English DT Article ID LIGHT-INDUCED EJECTION; GROUND-STATE; MAGNETOOPTICAL ROTATION; POTASSIUM ATOMS; SPIN RELAXATION; RB ATOMS; DESORPTION; GAS; MAGNETOMETERS; SURFACES AB The relaxation of atomic polarization in buffer-gas-free, paraffin-coated cesium vapor cells is studied using a variation on Franzen's technique of "relaxation in the dark" [Franzen, Phys. Rev. 115 850 (1959)]. In the present experiment, narrow-band, circularly polarized pump light, resonant with the Cs D2 transition, orients atoms along a longitudinal magnetic field, and time-dependent optical rotation of linearly polarized probe light is measured to determine the relaxation rates of the atomic orientation of a particular hyperfine level. The change in relaxation rates during light-induced atomic desorption (LIAD) is studied. No significant change in the spin relaxation rate during LIAD is found beyond that expected from the faster rate of spin-exchange collisions due to the increase in Cs density. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. SI Vavilov State Opt Inst, St Petersburg 199034, Russia. Lawrence Berkeley Lab, Adv Light Source Div, Berkeley, CA 94720 USA. RP Graf, MT (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. EM budker@socrates.berkeley.edu RI Balabas, Mikhail/A-5273-2012; Budker, Dmitry/F-7580-2016 OI Balabas, Mikhail/0000-0002-5383-7897; Budker, Dmitry/0000-0002-7356-4814 NR 58 TC 65 Z9 66 U1 1 U2 25 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 AUG PY 2005 VL 72 IS 2 AR 023401 DI 10.1103/PhysRevA.72.023401 PG 13 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 960BC UT WOS:000231564200130 ER PT J AU Haxton, DJ Rescigno, TN McCurdy, CW AF Haxton, DJ Rescigno, TN McCurdy, CW TI Topology of the adiabatic potential energy surfaces for the resonance states of the water anion SO PHYSICAL REVIEW A LA English DT Article ID DISSOCIATIVE ELECTRON-ATTACHMENT; TRIATOMIC NEGATIVE-IONS; SHORT-LIVED STATES; VIBRATIONAL-EXCITATION; CROSS-SECTIONS; ANGULAR-DEPENDENCE; GAS-PHASE; H2O; IMPACT; SCATTERING AB The potential energy surfaces corresponding to the long-lived fixed-nuclei electron scattering resonances of H2O relevant to the dissociative electron attachment process are examined using a combination of ab initio scattering and bound-state calculations. These surfaces have a rich topology, characterized by three main features: a conical intersection between the (2)A(1) and B-2(2) Feshbach resonance states; charge-transfer behavior in the OH ((2)Pi)+H- asymptote of the B-2(1) and (2)A(1) resonances; and an inherent double-valuedness of the surface for the B-2(2) state the C-2v geometry, arising from a branch-point degeneracy with a B-2(2) shape resonance. In total, eight individual seams of degeneracy among these resonances are identified. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. Univ Calif Davis, Dept Chem, Davis, CA 95616 USA. RP Haxton, DJ (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM djhaxton@lbl.gov; tnrescigno@lbl.gov; cwmccurdy@lbl.gov NR 51 TC 17 Z9 17 U1 2 U2 12 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 AUG PY 2005 VL 72 IS 2 AR 022705 DI 10.1103/PhysRevA.72.022705 PG 12 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 960BC UT WOS:000231564200098 ER PT J AU Magyar, RJ Burke, K AF Magyar, RJ Burke, K TI Density-functional theory in one dimension for contact-interacting fermions (vol 70, pg 032508, 2004) SO PHYSICAL REVIEW A LA English DT Correction C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Rutgers State Univ, Dept Chem & Chem Biol, Piscataway, NJ 08854 USA. RP Magyar, RJ (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RI burke, kieron/P-9201-2014 NR 1 TC 1 Z9 1 U1 0 U2 1 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 AUG PY 2005 VL 72 IS 2 AR 029901 DI 10.1103/PhysRevA.72.029901 PG 2 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 960BC UT WOS:000231564200227 ER PT J AU Pindzola, MS Robicheaux, F Colgan, J AF Pindzola, MS Robicheaux, F Colgan, J TI Double autoionization of hollow-atom states SO PHYSICAL REVIEW A LA English DT Article ID ELECTRON-IMPACT IONIZATION; IONS; LITHIUM; PHOTOIONIZATION; TRANSITIONS; 2S22P; LI+ AB A time-dependent close-coupling method for three-electron atomic systems is formulated to calculate the double autoionization of hollow-atom states. Initial excited states are obtained by relaxation of the Schrodinger equation in imaginary time, while autoionization rates are obtained by propagation in real time. A 12-coupled-channels nonperturbative calculation on a three-dimensional radial lattice yields a double-autoionization rate for the Li(2s(2)2p)-> Li2+(1s)+2e(-) transition that that is somewhat smaller than earlier many-body perturbation theory calculations and in reasonable agreement with rates extracted from resonance profiles found in more recent gamma+Li experiments. C1 Auburn Univ, Dept Phys, Auburn, AL 36849 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Pindzola, MS (reprint author), Auburn Univ, Dept Phys, Auburn, AL 36849 USA. OI Colgan, James/0000-0003-1045-3858 NR 23 TC 11 Z9 11 U1 0 U2 3 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 AUG PY 2005 VL 72 IS 2 AR 022709 DI 10.1103/PhysRevA.72.022709 PG 5 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 960BC UT WOS:000231564200102 ER PT J AU Vrinceanu, D AF Vrinceanu, D TI Electron impact ionization of Rydberg atoms SO PHYSICAL REVIEW A LA English DT Article ID CROSS-SECTIONS; HYDROGEN; SCATTERING; EXCITATION AB The cross section for ionization of Rydberg atoms in collision with electrons at low and moderate energies is calculated using classical trajectories. The dependence of the total cross section on the initial angular momentum of the target is revealed. Low-discrepancy sequences of (quasirandom) numbers are compared with plain random numbers to confirm that they can lead to improved convergence of calculation in certain cases. A phenomenological parametrization using only two parameters is shown to describe well the classical cross section over a wide range of energies and angular momenta. Using the classical scaling law, the results are extended to any principal quantum number. C1 Los Alamos Natl Lab, Theoret Div, Los Alamos, NM 87545 USA. RP Vrinceanu, D (reprint author), Los Alamos Natl Lab, Theoret Div, Los Alamos, NM 87545 USA. NR 25 TC 15 Z9 15 U1 1 U2 1 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 AUG PY 2005 VL 72 IS 2 AR 022722 DI 10.1103/PhysRevA.72.022722 PG 8 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 960BC UT WOS:000231564200115 ER PT J AU Aharony, A Entin-Wohlman, O AF Aharony, A Entin-Wohlman, O TI Measuring the Kondo effect in the Aharonov-Bohm interferometer SO PHYSICAL REVIEW B LA English DT Article ID CONDUCTANCE; SYSTEM AB The conductance G of an Aharonov-Bohm interferometer (ABI), with a strongly correlated quantum dot on one arm, is expressed in terms of the dot Green function, G(dd), the magnetic flux phi and the noninteracting parameters of the ABI {J(mu nu)}. At T=0, Fermi liquid theory yields the exact phi dependence of G. We show that one can extract G(dd) from the observed G(phi), for both closed and open ABI's. In the latter case, the phase shift beta deduced from G approximate to A+B cos(phi+beta) depends strongly on the {J(mu nu)}'s, and usually beta not equal pi/2. The {J(mu nu)}'s may also reduce the Kondo temperature. C1 Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel. Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel. Argonne Natl Lab, Argonne, IL 60439 USA. RP Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel. RI ENTIN, ORA/F-1114-2012 NR 24 TC 17 Z9 17 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 AUG PY 2005 VL 72 IS 7 AR 073311 DI 10.1103/PhysRevB.72.073311 PG 4 WC Physics, Condensed Matter SC Physics GA 960BF UT WOS:000231564500029 ER PT J AU Ahn, K Tsokol, AO Mozharivskyj, Y Gschneidner, KA Pecharsky, VK AF Ahn, K Tsokol, AO Mozharivskyj, Y Gschneidner, KA Pecharsky, VK TI Phase relationships and structural, magnetic, and thermodynamic properties of the Yb5Si4-Yb5Ge4 pseudobinary system SO PHYSICAL REVIEW B LA English DT Article ID RARE EARTH-GERMANIUM; CRYSTAL-STRUCTURE; SILICON COMPOUNDS; ALLOYS; GD-5(SIXGE1-X)(4); GD-5(SI2GE2); TRANSITION; DIAGRAM; ND5SI4 AB The crystallography, phase relationships, and physical properties of the Yb5SixGe4-x alloys with 0 <= x <= 4 have been examined by using single crystal and powder x-ray diffraction at room temperature, and dc magnetization and heat capacity measurements between 1.8 K and 400 K in magnetic fields ranging from 0 and 7 T. Unlike the majority of R5SixGe4-x systems studied to date, where R is the rare earth metal, all Yb-based germanide-silicides with the 5:4 stoichiometry crystallize in the same Gd5Si4-type structure. The magnetic properties of Yb5SixGe4-x materials are nearly composition independent, reflecting the persistence of the same crystal structure over the whole range of x from 0 to 4. Both the crystallographic and magnetic property data indicate that Yb5SixGe4-x alloys are heterogeneous mixed valence systems, in which the majority (60%) of Yb atoms is divalent, while the minority (40%) is trivalent. C1 Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA. RP Ahn, K (reprint author), Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA. EM vitkp@ameslab.gov OI Ahn, Kyunghan/0000-0002-7806-8043 NR 44 TC 27 Z9 27 U1 1 U2 22 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 AUG PY 2005 VL 72 IS 5 AR 054404 DI 10.1103/PhysRevB.72.054404 PG 11 WC Physics, Condensed Matter SC Physics GA 960BD UT WOS:000231564300080 ER PT J AU Antonov, VN Harmon, BN Yaresko, AN AF Antonov, VN Harmon, BN Yaresko, AN TI Electronic structure of mixed-valence and charge-ordered Sm and Eu pnictides and chalcogenides SO PHYSICAL REVIEW B LA English DT Article ID FLUCTUATION COMPOUND SM3SE4; NEUTRON-SCATTERING; THERMAL-PROPERTIES; BAND THEORY; TRANSITION; SM4BI3; MONOCHALCOGENIDES; YB4AS3; EU3S4; SPECTROSCOPY AB The electronic structure of the mixed-valence Sm and Eu pnictides R4X3 (R=Sm, Eu; X=As, Sb, Bi) and samarium and europium chalcogenides Sm3X4 (X=S, Se, Te), Eu3S4 were investigated theoretically from first principles, using the fully relativistic Dirac LMTO band structure method. The electronic structure is obtained with the rotationally invariant LSDA+U method. We find in Sm4Bi3 as a generic feature a very rigid pinning of the energy of Sm 4f hole states close to the top of the pnictide p band and the Fermi level pinned to those hole states. Eu4Bi3 was found to be a semimetal with low density of states at the Fermi level. The main trends in the electronic structure of the sequence of Sm4X3 and Eu4X3 compounds (X=As, Sb, or Bi) are discussed. A detailed comparison of the electronic and magnetic structures of Sm3S4 and Eu3S4 compounds is also presented. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Max Planck Inst Phys & Complex Syst, D-01187 Dresden, Germany. Ukrainian Acad Sci, Inst Met Phys, UA-03142 Kiev, Ukraine. RP Antonov, VN (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. NR 68 TC 16 Z9 16 U1 0 U2 29 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 AUG PY 2005 VL 72 IS 8 AR 085119 DI 10.1103/PhysRevB.72.085119 PG 13 WC Physics, Condensed Matter SC Physics GA 960BG UT WOS:000231564600044 ER PT J AU Armiento, R Mattsson, AE AF Armiento, R Mattsson, AE TI Functional designed to include surface effects in self-consistent density functional theory SO PHYSICAL REVIEW B LA English DT Article ID GENERALIZED GRADIENT APPROXIMATION; ELECTRON PARAMAGNETIC RESONANCE; NUCLEAR DOUBLE RESONANCE; IRRADIATED SILICON; ENERGY; GAS; PSEUDOPOTENTIALS; EXCHANGE; DEFECTS; SYSTEMS AB We design a density-functional-theory (DFT) exchange-correlation functional that enables an accurate treatment of systems with electronic surfaces. Surface-specific approximations for both exchange and correlation energies are developed. A subsystem functional approach is then used: an interpolation index combines the surface functional with a functional for interior regions. When the local density approximation is used in the interior, the result is a straightforward functional for use in self-consistent DFT. The functional is validated for two metals (Al, Pt) and one semiconductor (Si) by calculations of (i) established bulk properties (lattice constants and bulk moduli) and (ii) a property where surface effects exist (the vacancy formation energy). Good and coherent results indicate that this functional may serve well as a universal first choice for solid-state systems and that yet improved functionals can be constructed by this approach. C1 AlbaNova Univ Ctr, Royal Inst Technol, Dept Phys, SE-10691 Stockholm, Sweden. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP AlbaNova Univ Ctr, Royal Inst Technol, Dept Phys, SE-10691 Stockholm, Sweden. RI Armiento, Rickard/E-1413-2011 OI Armiento, Rickard/0000-0002-5571-0814 NR 29 TC 282 Z9 283 U1 3 U2 34 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 AUG PY 2005 VL 72 IS 8 AR 085108 DI 10.1103/PhysRevB.72.085108 PG 5 WC Physics, Condensed Matter SC Physics GA 960BG UT WOS:000231564600033 ER PT J AU Bayer, C Jorzick, J Hillebrands, B Demokritov, SO Kouba, R Bozinoski, R Slavin, AN Guslienko, KY Berkov, DV Gorn, NL Kostylev, MP AF Bayer, C Jorzick, J Hillebrands, B Demokritov, SO Kouba, R Bozinoski, R Slavin, AN Guslienko, KY Berkov, DV Gorn, NL Kostylev, MP TI Spin-wave excitations in finite rectangular elements of Ni80Fe20 SO PHYSICAL REVIEW B LA English DT Article ID SIZE MAGNETIC WIRES; VALVE HEADS; FIELD; SPECTRA; NOISE; DOTS; FLUCTUATIONS; SIMULATIONS; RELAXATION; PARTICLE AB A Brillouin light scattering study and theoretical interpretation of spin-wave modes in arrays of in-plane magnetized micron-size rectangular Ni80Fe20 elements are reported. It is shown that two-dimensional spin-wave eigenmodes of these elements can be approximately described as products of one-dimensional spin-wave eigenmodes of longitudinally and transversely magnetized long finite-width permalloy stripes. The lowest eigenmodes of rectangular elements are of dipole-exchange nature and are localized near the element edges, while the higher eigenmodes are of a mostly dipolar nature and are weakly localized near the element center. The frequency spectra and spatial profiles of these eigenmodes are calculated both analytically and numerically, and are compared with the results of the Brillouin light scattering experiment. C1 Tech Univ Kaiserslautern, Fachbereich Phys, D-67663 Kaiserslautern, Germany. Tech Univ Kaiserslautern, Forschungsschwerpunkt MINAS, D-67663 Kaiserslautern, Germany. Univ Munster, Inst Angew Phys, D-48149 Munster, Germany. Oakland Univ, Dept Phys, Rochester, MI 48309 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. INNOVENT eV Jena, D-07745 Jena, Germany. St Petersburg Electrotech Univ, St Petersburg 197376, Russia. RP Bayer, C (reprint author), Tech Univ Kaiserslautern, Fachbereich Phys, Erwin Schrodinger Str 56, D-67663 Kaiserslautern, Germany. EM cbayer@physik.uni-kl.de RI Kostylev, Mikhail/H-5214-2014; Hillebrands, Burkard/C-6242-2008; Demokritov, Sergej/C-4347-2013 OI Hillebrands, Burkard/0000-0001-8910-0355; Demokritov, Sergej/0000-0003-4422-4201 NR 44 TC 98 Z9 98 U1 4 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 AUG PY 2005 VL 72 IS 6 AR 064427 DI 10.1103/PhysRevB.72.064427 PG 12 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400094 ER PT J AU Boulet, P Colineau, E Wastin, F Javorsky, P Griveau, JC Rebizant, J Stewart, GR Bauer, ED AF Boulet, P Colineau, E Wastin, F Javorsky, P Griveau, JC Rebizant, J Stewart, GR Bauer, ED TI Magnetic properties of the two allotropic phases of PuGa3 SO PHYSICAL REVIEW B LA English DT Article ID INTERMETALLIC COMPOUNDS; SUPERCONDUCTIVITY; TEMPERATURE; PRESSURE; HEAT; DIFFRACTION; TRANSITION; CEPD2SI2; SYSTEM; NPGA3 AB PuGa3 crystallizes in either a trigonal structure type (R-3m) or in the hexagonal DO19 type (P6(3)/mmc). The magnetic properties of both allotropes were investigated by magnetization, specific heat, and electrical resistivity measurements down to low temperatures and under magnetic fields and high pressures. Both phases order magnetically; the trigonal modification corresponds to a soft ferromagnet below T-C=20 K with a saturated moment of 0.2 mu(B)/Pu, whereas the hexagonal one exhibits antiferromagnetic order below T-N=24 K which undergoes a metamagnetic transition at mu H-0(M)approximate to 6.1 T (at T=5 K). In the paramagnetic state, the effective magnetic moment inferred from a modified Curie-Weiss law amounts to mu(eff)approximate to 0.78 mu(B) for both phases, indicative of the occurrence of a Pu3+ charge state. The values of the electronic specific heat coefficient gamma approximate to 110 and 220 mJ/mol K-2 for the trigonal and hexagonal allotropes, respectively, indicate a moderate heavy fermion character. Comparisons with related compounds PuCoGa5, UGa3, and NpGa3 suggest a strong tendency toward 5f delocalization. C1 Commiss European Communities, Joint Res Ctr, Inst Transuranium Elements, D-76125 Karlsruhe, Germany. Charles Univ Prague, Fac Math & Phys, Dept Elect Struct, CR-12116 Prague, Czech Republic. Univ Florida, Dept Phys, Gainesville, FL 32611 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Commiss European Communities, Joint Res Ctr, Inst Transuranium Elements, POB 2340, D-76125 Karlsruhe, Germany. RI Bauer, Eric/D-7212-2011; Javorsky, Pavel/C-2132-2015; BOULET, Pascal/D-6494-2011 OI BOULET, Pascal/0000-0003-0684-4397 NR 33 TC 16 Z9 17 U1 4 U2 12 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 AUG PY 2005 VL 72 IS 6 AR 064438 DI 10.1103/PhysRevB.72.064438 PG 8 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400105 ER PT J AU Butko, VY Lashley, JC Ramirez, AP AF Butko, VY Lashley, JC Ramirez, AP TI Low-temperature field effect in a crystalline organic material SO PHYSICAL REVIEW B LA English DT Article ID EFFECT TRANSISTORS; SINGLE-CRYSTALS; TRANSPORT; FILMS; DEVICES AB Molecular organic materials offer the promise of unique electronic devices but also present challenges for understanding charge transport in narrow-band systems. Low-temperature studies elucidate fundamental transport processes. We report the lowest-temperature field-effect transport results on a crystalline oligomeric organic material, rubrene. We find field-effect switching with an on-off ratio up to 10(7) at temperatures down to 10 K. Gated transport shows a factor of similar to 10 suppression of the thermal activation energy in the 10-50 K range and nearly temperature-independent resistivity below 10 K. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Lucent Technol, Bell Labs, Murray Hill, NJ 07974 USA. Columbia Univ, New York, NY 10027 USA. RP Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 25 TC 18 Z9 18 U1 0 U2 10 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD AUG PY 2005 VL 72 IS 8 AR 081312 DI 10.1103/PhysRevB.72.081312 PG 4 WC Physics, Condensed Matter SC Physics GA 960BG UT WOS:000231564600015 ER PT J AU Callens, R L'abbe, C Meersschaut, J Serdons, I Sturhahn, W Toellner, TS AF Callens, R L'abbe, C Meersschaut, J Serdons, I Sturhahn, W Toellner, TS TI Phase determination in nuclear resonant scattering using a velocity drive as an interferometer and phase shifter SO PHYSICAL REVIEW B LA English DT Article ID SYNCHROTRON-RADIATION; HIGH-PRESSURE AB A scheme in which a velocity drive serves as an interferometer and phase shifter in nuclear resonant scattering experiments is presented, and a straightforward algorithm for phase determination is developed. The experimental feasibility of the concept is demonstrated for nuclear forward scattering by an alpha-iron foil for different directions of the hyperfine field. It is also shown that the obtained phase information can be used for the reconstruction of the energy spectrum. C1 Katholieke Univ Leuven, Inst Kern & Stralingsfys, B-3001 Heverlee, Belgium. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Katholieke Univ Leuven, Inst Kern & Stralingsfys, Celestijnenlaan 200D, B-3001 Heverlee, Belgium. NR 26 TC 5 Z9 5 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 AUG PY 2005 VL 72 IS 8 AR 081402 DI 10.1103/PhysRevB.72.081402 PG 4 WC Physics, Condensed Matter SC Physics GA 960BG UT WOS:000231564600018 ER PT J AU Cao, H Bai, FM Wang, NG Li, JF Viehland, D Xu, GY Shirane, G AF Cao, H Bai, FM Wang, NG Li, JF Viehland, D Xu, GY Shirane, G TI Intermediate ferroelectric orthorhombic and monoclinic M-B phases in [110] electric-field-cooled Pb(Mg1/3Nb2/3)O-3-30%PbTiO3 crystals SO PHYSICAL REVIEW B LA English DT Article ID PB(MG1/3NB2/3)O-3-PBTIO3 SINGLE-CRYSTALS; PIEZOELECTRIC PROPERTIES; POLARIZATION ROTATION; TRANSFORMATION AB Structural phase transformations of [110] electric-field-cooled Pb(Mg1/3Nb2/3)O-3-30%PbTiO3 (PMN-30%PT) crystals have been performed by x-ray diffraction. A phase sequence of cubic (C)-> tetragonal (T)-> orthorhombic (O)-> monoclinic (M-B) was found on field cooling (FC); and a rhombohedral (R)-> M-B -> O sequence was observed with increasing field, beginning from the zero-field-cooled condition at room temperature. The application of the [110] electric field induced a dramatic change in the phase sequence in the FC condition, compared to the corresponding data for PMN-30%PT crystals in a [001] field, which shows that the phase sequence in the FC condition is altered by the crystallographic direction along which a modest electric field (E) is applied. Only when E is applied along [110] are intermediate O and M-B phases observed. C1 Virginia Polytech Inst & State Univ, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Virginia Polytech Inst & State Univ, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA. RI Xu, Guangyong/A-8707-2010; Bai, Feiming/K-5762-2013 OI Xu, Guangyong/0000-0003-1441-8275; NR 22 TC 52 Z9 53 U1 1 U2 17 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 AUG PY 2005 VL 72 IS 6 AR 064104 DI 10.1103/PhysRevB.72.064104 PG 6 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400034 ER PT J AU Chen, XH Wang, KQ Hor, PH Xue, YY Chu, CW AF Chen, XH Wang, KQ Hor, PH Xue, YY Chu, CW TI Anomalies at the compensation temperature in the zero-magnetization ferromagnet (Sm,Gd)Al-2 SO PHYSICAL REVIEW B LA English DT Article ID EXCHANGE BIAS AB The unusual zero-magnetization ferromagnet (Sm1-xGdx)Al-2 (SGA) with x=0.01 and 0.02 is investigated by magnetic, and magnetotransport and calorimetric measurements. Striking features observed around the compensation temperature T-comp are an exchange bias in a single-magnetic-lattice compound such as SGA attributable to the anisotropy of the coupling between the spin and orbital moments; an anomalous Hall effect due to the asymmetric magnetic scattering of the conduction electrons; and a field-induced specific heat transition at T-comp ascribable to the field-induced switching of the spin and orbital moments in a polarized conduction electron sea. The observations reveal the richness of physics in the SGA compound system. C1 Univ Sci & Technol China, Hefei Natl Lab Phys Sci & Microscale, Anhua 230026, Peoples R China. Univ Sci & Technol China, Dept Phys, Anhua 230026, Peoples R China. Univ Houston, Dept Phys, Houston, TX 77204 USA. Univ Houston, Texas Ctr Superconduct & Adv Mat, Houston, TX 77204 USA. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Hong Kong Univ Sci & Technol, Hong Kong, Hong Kong, Peoples R China. RP Chen, XH (reprint author), Univ Sci & Technol China, Hefei Natl Lab Phys Sci & Microscale, Anhua 230026, Peoples R China. EM chenxh@ustc.edu.cn; Ching-Wu.Chu@mail.uh.edu NR 10 TC 8 Z9 8 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD AUG PY 2005 VL 72 IS 5 AR 054436 DI 10.1103/PhysRevB.72.054436 PG 5 WC Physics, Condensed Matter SC Physics GA 960BD UT WOS:000231564300112 ER PT J AU Christianson, AD Lawrence, JM Lobos, AM Aligia, AA Bauer, ED Moreno, NO Booth, CH Goremychkin, EA Sarrao, JL Thompson, JD Batista, CD Trouw, FR Hehlen, MP AF Christianson, AD Lawrence, JM Lobos, AM Aligia, AA Bauer, ED Moreno, NO Booth, CH Goremychkin, EA Sarrao, JL Thompson, JD Batista, CD Trouw, FR Hehlen, MP TI Anisotropic intermediate valence in Yb2M3Ga9 (M=Rh,Ir) SO PHYSICAL REVIEW B LA English DT Article ID SCATTERING AB The intermediate valence compounds Yb2M3Ga9 (M=Rh,Ir) exhibit an anisotropic magnetic susceptibility. We report measurements of the temperature dependence of the 4f occupation number, n(f)(T), for Yb2M3Ga9 as well as the magnetic inelastic neutron scattering spectrum S-mag(Delta E) at 12 and 300 K for Yb2Rh3Ga9. Both n(f)(T) and S-mag(Delta E) were calculated for the Anderson impurity model with crystal field terms within an approach based on the noncrossing approximation. These results corroborate the importance of crystal field effects in these materials; they also suggest that Anderson lattice effects are important to the physics of Yb2M3Ga9. C1 Univ Calif Irvine, Irvine, CA 92697 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina. Comis Nacl Energia Atom, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina. Lawrence Berkeley Lab, Livermore, CA 94550 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Christianson, AD (reprint author), Univ Calif Irvine, Irvine, CA 92697 USA. RI Booth, Corwin/A-7877-2008; Bauer, Eric/D-7212-2011; Lujan Center, LANL/G-4896-2012; Moreno, Nelson/H-1708-2012; christianson, andrew/A-3277-2016; Batista, Cristian/J-8008-2016 OI Moreno, Nelson/0000-0002-1672-4340; christianson, andrew/0000-0003-3369-5884; NR 10 TC 4 Z9 4 U1 0 U2 5 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 AUG PY 2005 VL 72 IS 8 AR 081102 DI 10.1103/PhysRevB.72.081102 PG 4 WC Physics, Condensed Matter SC Physics GA 960BG UT WOS:000231564600002 ER PT J AU Dabrowski, B Kolesnik, S Chmaissem, O Maxwell, T Avdeev, M Barnes, PW Jorgensen, JD AF Dabrowski, B Kolesnik, S Chmaissem, O Maxwell, T Avdeev, M Barnes, PW Jorgensen, JD TI Increase of ferromagnetic ordering temperature by the minority-band double-exchange interaction in SrRu1-xCrxO3 SO PHYSICAL REVIEW B LA English DT Article ID TRANSPORT-PROPERTIES; THIN-FILMS; SRRUO3; PEROVSKITES; SR1-XCAXRUO3 AB Structural, magnetic, and resistive properties of the chromium substituted SrRu1-xCrxO3 perovskites with increased ferromagnetic transition temperature from 163 to 188 K were studied for polycrystalline samples synthesized in air and at high pressure. The Cr solubility limit found at x=0.15 in air is controlled by geometrical constraints of the tolerance factor and can be extended to higher values through high-pressure synthesis at 3 GPa. A linear decrease of the lattice parameters and bond lengths and an increase of the bond angles with x are consistent with the substitution of smaller Cr4+/3+ for Ru4+/5+. Similar decreases of the magnetic susceptibility chi(m) in the paramagnetic region above T-c and the high-field magnetization at 5 K with increasing x also indicate the presence of the Cr4+/3+ and Ru4+/5+ ions. This chemical substitution creates a possible Ru4+/5+(d(4/3))-O2--Cr4+/3+(d(2/3)) minority band double-exchange interaction which involves the Cr3+ and Cr4+ in magnetic ordering that enhances the ordering temperature. A reduced coercive field determined from the magnetization curves and a minimum of the resistivity point to decreased disorder for slightly substituted compositions x similar to 0.025. C1 No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Dabrowski, B (reprint author), No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA. RI Avdeev, Maxim/A-5625-2008 OI Avdeev, Maxim/0000-0003-2366-5809 NR 24 TC 34 Z9 35 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 AUG PY 2005 VL 72 IS 5 AR 054428 DI 10.1103/PhysRevB.72.054428 PG 7 WC Physics, Condensed Matter SC Physics GA 960BD UT WOS:000231564300104 ER PT J AU Dalpian, GM Wei, SH AF Dalpian, GM Wei, SH TI Photoinduced cation interstitial diffusion in II-VI semiconductors SO PHYSICAL REVIEW B LA English DT Article ID DEFECT PHYSICS; SPECIAL POINTS; ELECTRON-GAS; ZNSE; GAAS; ZNTE; MODEL; ZINC; CDTE; EL2 AB The electronic structure, stability, and chemical trend of cation interstitials in II-VI semiconductors are studied through ab initio methods. We find that interstitials in the neutral charge state are more stable in the tetrahedral interstitial site near the cation (T-C), whereas in the (2+) charge state, they are more stable near the anion (T-A). This bistability is explained through the Coulomb coupling and energy-level repulsion in the two different interstitial sites. We show that the diffusion energy barrier changes when the defect charge state changes. We suggest that if electrons or holes are taken from the defect level by light, changing its charge state, the interstitial atom will be able to diffuse almost spontaneously due to a reduced diffusion barrier. These results can help unravel the nature of the recently observed photoinduced migration of interstitials in II-VI semiconductors. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Natl Renewable Energy Lab, Golden, CO 80401 USA. RI Dalpian, Gustavo/B-9746-2008 OI Dalpian, Gustavo/0000-0001-5561-354X NR 29 TC 13 Z9 13 U1 0 U2 3 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 AUG PY 2005 VL 72 IS 7 AR 075208 DI 10.1103/PhysRevB.72.075208 PG 5 WC Physics, Condensed Matter SC Physics GA 960BF UT WOS:000231564500082 ER PT J AU Du, MH Limpijumnong, S Zhang, SB AF Du, MH Limpijumnong, S Zhang, SB TI Hydrogen pairs and local vibrational frequencies in H-irradiated GaAs1-yNy SO PHYSICAL REVIEW B LA English DT Article ID GAAS AB First-principles total energy calculations show that proton relaxation in H-irradiated GaAs1-yNy follows an energy pathway to form a charged dihydride, instead of the charge-neutral H-2* monohydride. Charge neutralization will take place later, as the sample is grounded, which will lead to the spontaneous canting of the dihydrides. This canted N-2H model explains the recent puzzling IR observation, the recoveries of the GaAs band gap and lattice parameter, and the dihydride symmetry determined by the x-ray absorption near-edge structure experiment. It may also have broad implications for ion implantation studies in other solids. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. Suranaree Univ Technol, Natl Synchrotron Res Ctr, Nakhon Ratchasima 30000, Thailand. Suranaree Univ Technol, Sch Phys, Nakhon Ratchasima 30000, Thailand. RP Du, MH (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. RI Schaff, William/B-5839-2009; Du, Mao-Hua/B-2108-2010; Krausnick, Jennifer/D-6291-2013; Zhang, Shengbai/D-4885-2013 OI Du, Mao-Hua/0000-0001-8796-167X; Zhang, Shengbai/0000-0003-0833-5860 NR 19 TC 28 Z9 28 U1 0 U2 4 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD AUG PY 2005 VL 72 IS 7 AR 073202 DI 10.1103/PhysRevB.72.073202 PG 4 WC Physics, Condensed Matter SC Physics GA 960BF UT WOS:000231564500012 ER PT J AU Du, MH Zhang, SB AF Du, MH Zhang, SB TI DX centers in GaAs and GaSb SO PHYSICAL REVIEW B LA English DT Article ID HYDROSTATIC-PRESSURE; ALXGA1-XAS ALLOYS; DONORS; TRANSFORMATION; DEFECTS; LEVEL; INP AB We propose a DX center, beta-cation-cation-bonded (CCB)-DX, in III-V semiconductors based on first-principles calculations. Detailed structural and energetic analyses show that the relative stability of the beta-CCB-DX center with respect to two other previously proposed ones strongly depends on the size of the dopant atom. We find that the beta-CCB-DX center is most stable when a small group-VI atom replaces the host anion in III-V semiconductors. With the discovery of this DX center, several DX-related phenomena can be explained consistently. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Du, MH (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. RI Du, Mao-Hua/B-2108-2010; Krausnick, Jennifer/D-6291-2013; Zhang, Shengbai/D-4885-2013 OI Du, Mao-Hua/0000-0001-8796-167X; Zhang, Shengbai/0000-0003-0833-5860 NR 23 TC 13 Z9 13 U1 0 U2 6 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 AUG PY 2005 VL 72 IS 7 AR 075210 DI 10.1103/PhysRevB.72.075210 PG 4 WC Physics, Condensed Matter SC Physics GA 960BF UT WOS:000231564500084 ER PT J AU Erhart, P Bringa, EM Kumar, M Albe, K AF Erhart, P Bringa, EM Kumar, M Albe, K TI Atomistic mechanism of shock-induced void collapse in nanoporous metals SO PHYSICAL REVIEW B LA English DT Article ID POROUS ALUMINUM; COMPRESSION; CRYSTALS AB We have investigated the microstructural changes in ductile porous metals during high pressure-high strain rate loading employing atomistic simulations and explored their relation to recent experiments on polycrystalline copper samples. Molecular-dynamics simulations of shocks in porous, single-crystal samples show the formation of nanograins due to localized massive plastic deformation induced by the presence of voids. In the process of grain formation the individual voids serve as dislocation sources. The efficiency of these sources is further enhanced by their collective interaction which eventually leads to very high dislocation densities. In agreement with experimental studies, the simulations display a temporal delay of the particle velocity in comparison to perfectly crystalline samples. This delay increases with porosity. Our results point towards the importance of void-void interactions and collective effects during dynamic loading of porous materials. C1 Tech Univ Darmstadt, Inst Mat Wissensch, Darmstadt, Germany. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Tech Univ Darmstadt, Inst Mat Wissensch, Darmstadt, Germany. RI Bringa, Eduardo/F-8918-2011; Erhart, Paul/G-6260-2011; Albe, Karsten/F-1139-2011 OI Erhart, Paul/0000-0002-2516-6061; NR 26 TC 32 Z9 33 U1 1 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 AUG PY 2005 VL 72 IS 5 AR 052104 DI 10.1103/PhysRevB.72.052104 PG 4 WC Physics, Condensed Matter SC Physics GA 960BD UT WOS:000231564300004 ER PT J AU Fenter, P Zhang, Z AF Fenter, P Zhang, Z TI Model-independent one-dimensional imaging of interfacial structures at < 1 A resolution SO PHYSICAL REVIEW B LA English DT Article ID X-RAY-DIFFRACTION; WATER INTERFACE; RECONSTRUCTION; PHASE; CRYSTAL; REFLECTIVITY; PROFILES; FILMS AB The feasibility of model-independent error-correction algorithms is established for imaging buried interfacial structures in one dimension. Using the experimental structure factor modulus from x-ray specular reflectivity data, we directly compare structures derived by a modified Fienup algorithm using a known reference structure and that derived by traditional (model-dependent) least-squares fitting. This demonstrates the utility of this approach for determining one-dimensional interfacial electron density profiles with spatial resolution of < 1 angstrom. The potential applications and limitations of this approach are discussed. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Fenter, P (reprint author), Argonne Natl Lab, ER-203,9700 S Cass Ave, Argonne, IL 60439 USA. EM fenter@anl.gov; zhanzhang@anl.gov RI Zhang, Zhan/A-9830-2008; OI Zhang, Zhan/0000-0002-7618-6134; Fenter, Paul/0000-0002-6672-9748 NR 27 TC 14 Z9 14 U1 0 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 AUG PY 2005 VL 72 IS 8 AR 081401 DI 10.1103/PhysRevB.72.081401 PG 4 WC Physics, Condensed Matter SC Physics GA 960BG UT WOS:000231564600017 ER PT J AU Fluegel, B Zhang, Y Geisz, JF Mascarenhas, A AF Fluegel, B Zhang, Y Geisz, JF Mascarenhas, A TI Confirmation of the impurity-band model for GaP1-xNx SO PHYSICAL REVIEW B LA English DT Article ID GAP-N; NITROGEN; ALLOYS; SEMICONDUCTORS; SPECTROSCOPY; LUMINESCENCE; TRANSITIONS; EXCITONS; PAIRS AB Low-temperature absorption studies on freestanding GaP1-xNx films provide direct experimental evidence that the host conduction band minimum (CBM) near X-1C does not plunge downward with increased nitrogen doping contrary to what has been suggested recently, but in fact remains stationary for x up to 0.1%. This, combined with the results of earlier studies of the CBM at Gamma and conduction band edge near L, confirms that the giant band-gap lowering observed in GaP1-xNx results from a CBM that evolves purely from nitrogen impurity bands. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Fluegel, B (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 29 TC 15 Z9 15 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 AUG PY 2005 VL 72 IS 7 AR 073203 DI 10.1103/PhysRevB.72.073203 PG 4 WC Physics, Condensed Matter SC Physics GA 960BF UT WOS:000231564500013 ER PT J AU Ghita, M Fornari, M Singh, DJ Halilov, SV AF Ghita, M Fornari, M Singh, DJ Halilov, SV TI Interplay between A-site and B-site driven instabilities in perovskites SO PHYSICAL REVIEW B LA English DT Article ID PHASE-TRANSITIONS; BARIUM-TITANATE; ANTIFERROELECTRIC PBZRO3; PIEZOELECTRIC BEHAVIOR; FERROELECTRIC PHASE; LATTICE-DYNAMICS; LOCAL-STRUCTURE; 1ST PRINCIPLES; SOLID-SOLUTION; DOPED PZT AB Density functional calculations are used to investigate the trends in the lattice instabilities of the perovskites, BaTiO3, PbTiO3, BaZrO3, and PbZrO3 with volume. A simple scheme for classifying perovskites in terms of A-site and B-site activities is discussed in relation to competition between rhombohedral and tetragonal ground states. C1 Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RJ Mears LLC, Waltham, MA 02451 USA. RP Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA. RI Fornari, Marco/C-8848-2012; Singh, David/I-2416-2012 OI Fornari, Marco/0000-0001-6527-8511; NR 40 TC 64 Z9 64 U1 5 U2 34 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 AUG PY 2005 VL 72 IS 5 AR 054114 DI 10.1103/PhysRevB.72.054114 PG 5 WC Physics, Condensed Matter SC Physics GA 960BD UT WOS:000231564300051 ER PT J AU Goupalov, SV AF Goupalov, SV TI Nonradiative multiphonon transitions in semiconductor quantum dots SO PHYSICAL REVIEW B LA English DT Article ID APPROXIMATION; RELAXATION AB A mathematical formalism suitable for a treatment of nonradiative multiphonon transitions in semiconductor quantum dots is developed. An analytical expression for the temperature dependence of the transition rate is derived. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia. RP Goupalov, SV (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA. NR 15 TC 7 Z9 7 U1 0 U2 0 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 AUG PY 2005 VL 72 IS 7 AR 073301 DI 10.1103/PhysRevB.72.073301 PG 4 WC Physics, Condensed Matter SC Physics GA 960BF UT WOS:000231564500019 ER PT J AU Gozar, A Dennis, BS Kageyama, H Blumberg, G AF Gozar, A Dennis, BS Kageyama, H Blumberg, G TI Symmetry and light coupling to phononic and collective magnetic excitations in SrCu2(BO3)(2) SO PHYSICAL REVIEW B LA English DT Article ID DIMER COMPOUND SRCU2(BO3)(2); SPIN SYSTEM SRCU2(BO3)(2); GROUND-STATE; BOUND-STATES; MODEL; SPECTRUM AB We perform a low temperature Raman scattering study of phononic and collective spin excitations in the orthogonal dimers compound SrCu2(BO3)(2), focusing on the symmetry and the effects of external fields on the magnetic modes. The zero field symmetry and the behavior in magnetic fields of the elementary and bound magnetic triplet states are experimentally determined. We find that a minimal 4-spin cluster forming the unit cell is able to describe the symmetry as well as the anisotropic dispersions in external fields of the spin gap multiplet branches around 24 cm(-1). We identify two Raman coupling mechanisms responsible for the distinct resonance behavior of these magnetic modes and we show that one of these can be ascribed to an effective intradimer Dzyaloshinskii-Moriya spin interaction. Our data also suggest a possible explanation for the existence of a strongly bound two-triplet state in the singlet sector which has an energy below the spin gap. The low temperature phononic spectra suggest strong spin-phonon coupling and show intriguing quasidegeneracy of modes in the context of the present crystal structure determination. C1 Univ Illinois, Urbana, IL 61801 USA. Kyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6068502, Japan. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Gozar, A (reprint author), Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA. EM agozar@bnl.gov; girsh@bell-labs.com RI Kageyama, Hiroshi/A-4602-2010 NR 26 TC 10 Z9 10 U1 0 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 AUG PY 2005 VL 72 IS 6 AR 064405 DI 10.1103/PhysRevB.72.064405 PG 9 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400072 ER PT J AU Gurvitz, SA Berman, GP AF Gurvitz, SA Berman, GP TI Single qubit measurements with an asymmetric single-electron transistor SO PHYSICAL REVIEW B LA English DT Article ID QUANTUM MEASUREMENTS; RATE-EQUATIONS; INTERFERENCE; TRANSPORT; DETECTOR; SYSTEMS AB We investigate qubit measurements using a single-electron transistor (SET). Applying the Schrodinger equation to the entire system we find that an asymmetric SET is considerably more efficient than a symmetric SET. Yet, its efficiency does not reach that of an ideal detector even in the large asymmetry limit. We also compare the SET detector with a point-contact detector. This comparison allows us to illuminate the relation between information gain in the measurement process and the decoherence generated by these measurement devices. C1 Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Gurvitz, SA (reprint author), Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel. NR 20 TC 40 Z9 41 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 AUG PY 2005 VL 72 IS 7 AR 073303 DI 10.1103/PhysRevB.72.073303 PG 4 WC Physics, Condensed Matter SC Physics GA 960BF UT WOS:000231564500021 ER PT J AU Hays, J Punnoose, A Baldner, R Engelhard, MH Peloquin, J Reddy, KM AF Hays, J Punnoose, A Baldner, R Engelhard, MH Peloquin, J Reddy, KM TI Relationship between the structural and magnetic properties of Co-doped SnO2 nanoparticles SO PHYSICAL REVIEW B LA English DT Article ID ROOM-TEMPERATURE FERROMAGNETISM; THIN-FILMS; SEMICONDUCTORS; NANOCRYSTALS; SPECTROSCOPY; Y(CO1-XALX)2; DIOXIDE; POWDERS; GROWTH; RAMAN AB In this paper, we present the results of a detailed investigation of the structural, optical, and magnetic properties of chemically synthesized pure and Co-doped SnO2 powders using x-ray diffraction (XRD), diffuse reflectance spectroscopy, Raman spectroscopy, x-ray photoelectron spectroscopy, and magnetometry. In Sn1-xCoxO2 samples prepared at 600 degrees C with low doping concentrations of Co (<= 1%), the SnO2 lattice contracts, band gap energy decreases, and a ferromagnetic behavior is developed. Increasing the Co doping concentration to > 1% leads to a rapid expansion of the lattice and significant structural disorder evidenced by changes in the XRD and Raman spectra presumably due to additional interstitial incorporation of Co. This higher Co doping completely destroys the ferromagnetism. The striking similarity between the changes in the lattice parameters and the magnetic properties of Sn1-xCoxO2 indicates a structure-magnetic property relationship. C1 Boise State Univ, Dept Phys, Boise, ID 83725 USA. Micro Technol, Analyt Chem Lab, Boise, ID 83707 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. Boise State Univ, Dept Chem, Boise, ID 83725 USA. RP Hays, J (reprint author), Boise State Univ, Dept Phys, Boise, ID 83725 USA. RI Engelhard, Mark/F-1317-2010; OI Engelhard, Mark/0000-0002-5543-0812 NR 33 TC 149 Z9 150 U1 4 U2 27 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 AUG PY 2005 VL 72 IS 7 AR 075203 DI 10.1103/PhysRevB.72.075203 PG 7 WC Physics, Condensed Matter SC Physics GA 960BF UT WOS:000231564500077 ER PT J AU He, LX Bester, G Zunger, A AF He, LX Bester, G Zunger, A TI Electronic asymmetry in self-assembled quantum dot molecules made of identical InAs/GaAs quantum dots SO PHYSICAL REVIEW B LA English DT Article ID SINGLE; COMPUTATION; STATES AB We show that a diatomic dot molecule made of two identical, vertically stacked, strained InAs/GaAs self-assembled dots exhibits an asymmetry in its single- and many-particle wave functions. The single particle wave function is asymmetric due to the inhomogeneous strain, while the asymmetry of the many-particle wave functions is caused by the correlation-induced localization: the lowest singlet (1)Sigma(g) and triplet (3)Sigma states show that the two electrons are each localized on different dots within the molecule; for the next singlet states (1)Sigma(u) both electrons are localized on the same (bottom) dot for interdot separation d > 8 nm. The singlet-triplet splitting is found to be similar to 0.1 meV at interdot separation d=9 nm and as large as 100 meV for d=4 nm, orders of magnitude larger than the few meV found in the large (50-100 nm) electrostatically confined dots. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP He, LX (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. RI Bester, Gabriel/I-4414-2012; Zunger, Alex/A-6733-2013 OI Bester, Gabriel/0000-0003-2304-0817; NR 26 TC 20 Z9 20 U1 0 U2 0 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 AUG PY 2005 VL 72 IS 8 AR 081311 DI 10.1103/PhysRevB.72.081311 PG 4 WC Physics, Condensed Matter SC Physics GA 960BG UT WOS:000231564600014 ER PT J AU Iddir, H Ogut, S Browning, ND Disko, MM AF Iddir, H Ogut, S Browning, ND Disko, MM TI Adsorption and diffusion of Pt and Au on the stoichiometric and reduced TiO2 rutile (110) surfaces SO PHYSICAL REVIEW B LA English DT Article ID METAL-SUPPORT INTERACTION; CATALYTIC-ACTIVITY; TITANIUM-DIOXIDE; GOLD CLUSTERS; TIO2(110); ATOMS; ENERGETICS; PLATINUM; GROWTH; ENERGY AB A comparative ab initio pseudopotential study of the adsorption and migration profiles of single neutral Pt and Au atoms on the stoichiometric and reduced TiO2 rutile (110) surfaces is presented. Pt and Au behave similarly with respect to (i) most favorable adsorption sites, (ii) the large increase in their binding energy when the surface is reduced, and (iii) their low migration barrier on the stoichiometric surface. Pt, on the other hand, binds more strongly (by similar to 2 eV) to both surfaces. On the stoichiometric surface, Pt migration pattern is expected to be one dimensional, which is primarily influenced by interactions with O atoms. Au migration is expected to be two dimensional, with Au-Ti interactions playing a more important role. On the reduced surface, the migration barrier of Pt trapped at an O vacancy site is significantly larger compared to that of Au. C1 Univ Illinois, Dept Phys, Chicago, IL 60607 USA. Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA. NCEM, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. ExxonMobil Res & Engn Co, Corp Strateg Res, Annandale, NJ 08801 USA. RP Univ Illinois, Dept Phys, Chicago, IL 60607 USA. RI Ogut, Serdar/B-1749-2012; OI Browning, Nigel/0000-0003-0491-251X NR 30 TC 64 Z9 64 U1 1 U2 31 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 AUG PY 2005 VL 72 IS 8 AR 081407 DI 10.1103/PhysRevB.72.081407 PG 4 WC Physics, Condensed Matter SC Physics GA 960BG UT WOS:000231564600023 ER PT J AU Idrobo, JC Ogut, S Jellinek, J AF Idrobo, JC Ogut, S Jellinek, J TI Size dependence of the static polarizabilities and absorption spectra of Ag-n (n=2-8) clusters SO PHYSICAL REVIEW B LA English DT Article ID DENSITY-FUNCTIONAL THEORY; SMALL SILVER CLUSTERS; POTENTIAL-CONFIGURATION INTERACTION; DIFFERENCE-PSEUDOPOTENTIAL METHOD; AB-INITIO; OPTICAL-RESPONSE; METAL-CLUSTERS; ELECTRONIC-STRUCTURE; PHOTOELECTRON-SPECTRA; SMALL SEMICONDUCTOR AB Static polarizabilities and optical absorption spectra of ground state structures of Ag-n clusters (n=2-8) are investigated from first principles within static and time-dependent density functional theory. The static polarizabilities of the clusters with less than 7 atoms exhibit even-odd oscillations. The polarizabilities of Ag-7 and Ag-8 are very close and noticeably lower. This change in the behavior of the static polarizability is correlated with the transition from two-dimensional to three-dimensional structures at n=7. The optical spectra calculated within the time-dependent local density approximation indicate sharp excitations in the 3-5 eV region. These are associated mainly with s electrons, although d electrons also affect the spectra by quenching the oscillator strengths through screening of the s electrons and by getting partially involved in the excitations. The calculated optical spectra are in good agreement with the available experimental data and results from earlier theoretical studies. C1 Univ Illinois, Dept Phys, Chicago, IL 60607 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Idrobo, JC (reprint author), Univ Illinois, Dept Phys, Chicago, IL 60607 USA. RI Ogut, Serdar/B-1749-2012; Idrobo, Juan/H-4896-2015 OI Idrobo, Juan/0000-0001-7483-9034 NR 78 TC 81 Z9 83 U1 2 U2 23 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 AUG PY 2005 VL 72 IS 8 AR 085445 DI 10.1103/PhysRev.72.085445 PG 8 WC Physics, Condensed Matter SC Physics GA 960BG UT WOS:000231564600172 ER PT J AU Jin, R Sales, BC Li, S Mandrus, D AF Jin, R Sales, BC Li, S Mandrus, D TI Dependence of the specific heat of NaxCoO2 center dot yH(2)O/D2O on sodium and water concentrations SO PHYSICAL REVIEW B LA English DT Article ID SUPERCONDUCTIVITY; THERMOPOWER AB We report specific heat measurements down to 0.4 K on the layered oxide Na(x)CoO(2)center dot yH(2)O/D2O with 0 <= x <= 0.74 and y=0 and 1.4. For the nonhydrated system (y=0), the electronic specific heat coefficient gamma(N) and the Debye temperature Theta(D) vary nonmonotonically with x, both displaying minima when x is close to 0.5. This indicates a systematic change of the electronic and vibrational structures with Na content. For both hydrated and deuterated systems (x=0.35 and y=1.4), the specific heat reveals a sharp peak with Delta C(p)similar to 45.5 mJ/mol K at T (mid)(c)similar to 4.7 K and an anomaly at T(x)similar to 0.8 K. While the origin of the latter is not clear, the former corresponds to the superconducting transition. With the application of magnetic fields up to 14 Tesla, T-c decreases gradually but T-x remains more or less unchanged. The implication of these results is discussed. C1 Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. RP Jin, R (reprint author), Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. EM jinr@ornl.gov RI Li, Shiliang/B-9379-2009; Mandrus, David/H-3090-2014 NR 26 TC 26 Z9 26 U1 0 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 AUG PY 2005 VL 72 IS 6 AR 060512 DI 10.1103/PyhsRevB.72.060512 PG 4 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400028 ER PT J AU Kadau, K Germann, TC Lomdahl, PS Holian, BL AF Kadau, K Germann, TC Lomdahl, PS Holian, BL TI Atomistic simulations of shock-induced transformations and their orientation dependence in bcc Fe single crystals SO PHYSICAL REVIEW B LA English DT Article ID MOLECULAR-DYNAMICS SIMULATIONS; INDUCED PHASE-TRANSITION; PERFECT CRYSTALS; HIGH-PRESSURE; IRON; WAVES; METALS; MARTENSITE; IMPURITIES; POTENTIALS AB By multimillion-atom classical molecular dynamics simulations employing an embedded atom method potential, we investigate shock-induced phase transformations in body-centered cubic Fe single crystals caused by shock loading along [001](bcc), [011](bcc), and [111](bcc) directions. Significant dependence of the developing microstructure on the crystallographic shock direction is evident, but we see only a weak dependence of the transition pressures for the body-centered -> close-packed and solid -> melt transitions on the shock direction. The Hugoniots obtained by simulations of samples with lengths approaching one micrometer are compared to experimental work for pressures and temperatures above shock-induced melting. Crystallographic relationships between the parent and product phase found in the simulations are common for martensitic transformations. We discuss the influence of different embedded atom method potentials on the dynamics of the transformation. We see solitary waves ahead of the shock front. The velocities of these waves decrease in time, such that they are absorbed into the shock front within a distance of propagation of one mu m or less. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Appl Phys, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA. EM kkadau@lanl.gov; tcg@lanl.gov; pxl@lanl.gov; blh@lanl.gov NR 64 TC 95 Z9 102 U1 1 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 AUG PY 2005 VL 72 IS 6 AR 064120 DI 10.1103/PhysRevB.72.064120 PG 14 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400050 ER PT J AU Kaindl, RA Carnahan, MA Chemla, DS Oh, S Eckstein, JN AF Kaindl, RA Carnahan, MA Chemla, DS Oh, S Eckstein, JN TI Dynamics of cooper pair formation in Bi2Sr2CaCu2O8+delta SO PHYSICAL REVIEW B LA English DT Article ID QUASI-PARTICLE DYNAMICS; NONEQUILIBRIUM SUPERCONDUCTIVITY; YBA2CU3O7-DELTA; LIFETIMES; SINGLE AB We report ultrafast measurements of the transient terahertz conductivity in the high-T-C superconductor Bi2Sr2CaCu2O8+delta. After depletion of the superconducting condensate by optical excitation, the ensuing dynamics is tracked with high sensitivity at various excitation densities and temperatures. We measure low-energy spectra and shapes of decay that demonstrate a bimolecular kinetics of condensate formation on a picosecond time scale and yield a measure of quasiparticle interactions hidden in linear spectroscopy. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. EO Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA. Univ Illinois, Dept Phys, Urbana, IL 61801 USA. RP Kaindl, RA (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. NR 29 TC 59 Z9 59 U1 4 U2 22 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 AUG PY 2005 VL 72 IS 6 AR 060510 DI 10.1103/PhysRevB.72.060510 PG 4 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400026 ER PT J AU Kazimirov, VY Louca, D Ponnambalam, V Poon, SJ Proffen, T AF Kazimirov, VY Louca, D Ponnambalam, V Poon, SJ Proffen, T TI Modeling the atomic structure of amorphous steels using crystalline approximants SO PHYSICAL REVIEW B LA English DT Article ID BULK METALLIC GLASSES; ALLOYS; LIQUIDS; INTERMEDIATE; TRANSITION; SCATTERING; PACKINGS; PHASE; NB AB Using the pair density function analysis of pulsed neutron diffraction data, the local topology of Fe-based metallic glasses with good glass forming ability was investigated upon alloying with transition metal ions of Y, Zr, or Mo. Distinct short and medium range atomic order with common characteristics in all the glasses is observed. The local order is well described by a geometrical model constructed from superposition of "crystalline approximant" phases which is different from Frank-Kasper polyhedra clustering or dense random packing models. The mechanism responsible for the structure in the glass phase might involve a frustration-induced structural disorder of the crystalline approximant phases as they are driven away from stable stoichiometric compositions. C1 Univ Virginia, Dept Phys, Charlottesville, VA 22904 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Univ Virginia, Dept Phys, Charlottesville, VA 22904 USA. EM louca@virginia.edu RI Lujan Center, LANL/G-4896-2012; Proffen, Thomas/B-3585-2009 OI Proffen, Thomas/0000-0002-1408-6031 NR 43 TC 6 Z9 6 U1 1 U2 3 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 AUG PY 2005 VL 72 IS 5 AR 054207 DI 10.1103/PhysRevB.72.054207 PG 5 WC Physics, Condensed Matter SC Physics GA 960BD UT WOS:000231564300070 ER PT J AU Kent, PRC Jarrell, M Maier, TA Pruschke, T AF Kent, PRC Jarrell, M Maier, TA Pruschke, T TI Efficient calculation of the antiferromagnetic phase diagram of the three-dimensional Hubbard model SO PHYSICAL REVIEW B LA English DT Article ID ELECTRON-SYSTEMS; APPROXIMATION; QUANTUM; TEMPERATURE; DIMENSIONS; LATTICE AB The dynamical cluster approximation (DCA) with Betts clusters is used to calculate the antiferromagnetic phase diagram of the three-dimensional Hubbard model at half-filling. Betts clusters are a set of periodic clusters which best reflect the properties of the lattice in the thermodynamic limit and provide an optimal finite-size scaling as a function of cluster size. Using a systematic finite-size scaling as a function of cluster space-time dimensions, we calculate the antiferromagnetic phase diagram. Our results are qualitatively consistent with the results of Staudt [Eur. Phys. J. B 17, 411 (2000)], but require the use of much smaller clusters: 48 compared to 1000. C1 Univ Tennessee, Knoxville, TN 37996 USA. Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA. Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA. Univ Gottingen, Inst Theoret Phys, D-37077 Gottingen, Germany. RP Kent, PRC (reprint author), Univ Tennessee, Knoxville, TN 37996 USA. RI Kent, Paul/A-6756-2008; Pruschke, Thomas/H-5046-2011; Pruschke, Thomas/H-5065-2011; Maier, Thomas/F-6759-2012 OI Kent, Paul/0000-0001-5539-4017; Maier, Thomas/0000-0002-1424-9996 NR 14 TC 49 Z9 49 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 AUG PY 2005 VL 72 IS 6 AR 060411 DI 10.1103/PhysRevB.72.060411 PG 4 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400015 ER PT J AU Kim, JW Lee, Y Wermeille, D Sieve, B Tan, L Bud'ko, SL Law, S Canfield, PC Harmon, BN Goldman, AI AF Kim, JW Lee, Y Wermeille, D Sieve, B Tan, L Bud'ko, SL Law, S Canfield, PC Harmon, BN Goldman, AI TI Systematics of x-ray resonant scattering amplitudes in RNi2Ge2 (R=Gd,Tb,Dy,Ho,Er,Tm): The origin of the branching ratio at the L edges of the heavy rare earths SO PHYSICAL REVIEW B LA English DT Article ID EXCHANGE-SCATTERING; MAGNETIC-STRUCTURES; CIRCULAR-DICHROISM; POLARIZATION; GADOLINIUM AB An investigation of the x-ray resonant magnetic scattering (XRMS) across the series of heavy rare-earth elements, coupled with first-principles calculations, has revealed that spin-orbit coupling in the 5d band plays a critical role in the systematics of the XRMS and x-ray magnetic circular dichroism branching ratio at the L edges of magnetic rare-earth compounds. C1 Iowa State Univ, Ames Lab, USDOE, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. RP Iowa State Univ, Ames Lab, USDOE, Ames, IA 50011 USA. EM goldman@ameslab.gov RI Canfield, Paul/H-2698-2014 NR 23 TC 22 Z9 22 U1 1 U2 5 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 AUG PY 2005 VL 72 IS 6 AR 064403 DI 10.1103/PhysRevB.72.064403 PG 6 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400070 ER PT J AU Kim, TK Wells, J Kirkegaard, C Li, Z Hoffmann, SV Gayone, JE Fernandez-Torrente, I Haberle, P Pascual, JI Moore, KT Schwartz, AJ He, H Spence, JCH Downing, KH Lazar, S Tichelaar, FD Borisenko, SV Knupfer, M Hofmann, P AF Kim, TK Wells, J Kirkegaard, C Li, Z Hoffmann, SV Gayone, JE Fernandez-Torrente, I Haberle, P Pascual, JI Moore, KT Schwartz, AJ He, H Spence, JCH Downing, KH Lazar, S Tichelaar, FD Borisenko, SV Knupfer, M Hofmann, P TI Evidence against a charge density wave on Bi(111) SO PHYSICAL REVIEW B LA English DT Article ID FRIEDEL OSCILLATIONS; ELECTRONIC-STRUCTURE; SURFACE; BISMUTH; BI2SR2CACU2O8+DELTA; STATES; STM AB The Bi(111) surface was studied by scanning tunneling microscopy (STM), transmission electron microscopy (TEM), and angle-resolved photoemission spectroscopy (ARPES) in order to verify the existence of a recently proposed surface charge-density wave (CDW) [Ch. R. Ast and H. Hochst, Phys. Rev. Lett. 90, 016403 (2003)]. The STM and TEM results do not support a CDW scenario at low temperatures. Furthermore, the quasiparticle interference pattern observed in STM confirms the spin-orbit split character of the surface states which prevents the formation of a CDW, even in the case of good nesting. The dispersion of the electronic states observed with ARPES agrees well with earlier findings. In particular, the Fermi contour of the electron pocket at the center of the surface Brillouin zone is found to have a hexagonal shape. However, no gap opening or other signatures of a CDW phase transition can be found in the temperature-dependent data. C1 Aarhus Univ, Inst Storage Ring Facil, DK-8000 Aarhus, Denmark. Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina. Consejo Nacl Invest Cient & Tecn, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina. Free Univ Berlin, Inst Phys Expt, D-14195 Berlin, Germany. Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA. Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA. Delft Univ Technol, Natl Ctr High Resout Elect Microscopy, NL-2628 AL Delft, Netherlands. IFW Dresden, Inst Solid State Res, D-01171 Dresden, Germany. RP Aarhus Univ, Inst Storage Ring Facil, DK-8000 Aarhus, Denmark. EM philip@phys.au.dk RI Wells, Justin/C-1217-2011; Pascual, Jose/F-3489-2011; Borisenko, Sergey/G-6743-2012; Hofmann, Philip/B-5938-2008; Kirkegaard, Casper/N-1146-2013; Haberle, Patricio/A-5774-2013; Pascual, Jose Ignacio/N-3102-2016 OI Wells, Justin/0000-0001-6366-366X; Borisenko, Sergey/0000-0002-5046-4829; Hofmann, Philip/0000-0002-7367-5821; Pascual, Jose Ignacio/0000-0002-7152-4747 NR 39 TC 27 Z9 27 U1 4 U2 33 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 AUG PY 2005 VL 72 IS 8 AR 085440 DI 10.1103/PhysRevB.72.085440 PG 7 WC Physics, Condensed Matter SC Physics GA 960BG UT WOS:000231564600167 ER PT J AU Kogan, S AF Kogan, S TI van der Waals force noise: Quantum theory of fluctuations SO PHYSICAL REVIEW B LA English DT Article ID SOLIDS AB The quantum theory of the fluctuations of the van der Waals (vdW) force between macroscopic bodies is developed. Unlike the mean vdW force that is determined by all quantum states that contribute to the optical absorption, the energies of those excitations of the interacting bodies that contribute effectively to the vdW force noise are thermal energies. Contrary to the mean vdW force, the vdW force noise drops with decreasing temperature. Due to these differences the main mechanism of the mean vdW force and that of the vdW force noise may be different, e.g., the mean vdW force is determined by electronic excitations, the force noise by the random lattice or impurity dynamics. Since the vdW force is linear in the fields squared its spectral density depends not only on the frequency of its measurement omega(S) but also on the integral over the second frequency. The dependence of its integrand on this frequency and temperature is quantumlike even at small omega(S)< k(B)T/h, and such may be the behavior of the vdW noise. In the case of interacting metals the vdW force noise is enhanced by dc voltage applied across these metals. This additional noise is proportional to the voltage squared and to the spectral density of the random electric field at the frequency of noise measurement. The theory is in qualitative agreement with experiments. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Kogan, S (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM shkogan@comcast.net NR 14 TC 0 Z9 0 U1 1 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 AUG PY 2005 VL 72 IS 7 AR 075310 DI 10.1103/PhysRevB.72.075310 PG 9 WC Physics, Condensed Matter SC Physics GA 960BF UT WOS:000231564500097 ER PT J AU Koshelev, AE Varlamov, AA Vinokur, VM AF Koshelev, AE Varlamov, AA Vinokur, VM TI Theory of fluctuations in a two-band superconductor: MgB2 SO PHYSICAL REVIEW B LA English DT Article AB A theory of fluctuations in two-band superconductor MgB2 is developed. Since the standard Ginzburg-Landau (GL) approach fails in description of its properties, we generalize it based on the microscopic theory of a two-band superconductor. Calculating the microscopic fluctuation propagator, we build up the nonlocal two-band GL functional and the corresponding time-dependent GL equations. This allows us to calculate the main fluctuation observables such as fluctuation specific heat and conductivity. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. INFM, Coherentia, I-00133 Rome, Italy. RP Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Koshelev, Alexei/K-3971-2013 OI Koshelev, Alexei/0000-0002-1167-5906 NR 40 TC 20 Z9 20 U1 2 U2 9 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD AUG PY 2005 VL 72 IS 6 AR 064523 DI 10.1103/PhysRevB.72.064523 PG 11 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400146 ER PT J AU Lai, K Pan, W Tsui, DC Lyon, SA Muhlberger, M Schaffler, F AF Lai, K Pan, W Tsui, DC Lyon, SA Muhlberger, M Schaffler, F TI Two-dimensional metal-insulator transition and in-plane magnetoresistance in a high-mobility strained Si quantum well SO PHYSICAL REVIEW B LA English DT Article ID PARALLEL MAGNETIC-FIELD; 2D ELECTRON-SYSTEM; GAS; DIMENSIONS; GAAS AB The apparent metal-insulator transition is observed in a high-quality two-dimensional electron system (2DES) in the strained Si quantum well of a Si/Si1-xGex heterostructure with mobility mu=1.9x10(5) cm(2)/V s at density n=1.45x10(11) cm(-2). The critical density, at which the thermal coefficient of low T resistivity changes sign, is similar to 0.32x10(11) cm(-2), a very low value obtained in Si-based 2D systems. The in-plane magnetoresistivity rho(B-ip) was measured in the density range, 0.35x10(11)< n < 1.45x10(11) cm(-2), where the 2DES shows the metalliclike behavior. It first increases and then saturates to a finite value rho(B-c) for B-ip> B-c, with B-c the full spin-polarization field. Surprisingly, rho(B-c)/rho(0)similar to 1.8 for all the densities, even down to n=0.35x10(11) cm(-2), only 10% higher than n(c). This is different from that in clean Si metal-oxide-semiconductor field-effect transistors, where the enhancement is strongly density dependent and rho(B-c)/rho(0) appears to diverge as n -> n(c). Finally, we show that in the fully spin-polarized regime, dependent on the 2DES density, the temperature dependence of rho(B-ip) can be either metalliclike or insulating. C1 Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. Univ Linz, Inst Halbleiterphys, A-4040 Linz, Austria. RP Lai, K (reprint author), Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA. RI Muhlberger, Michael/A-6586-2010; Schaffler, Friedrich/C-7026-2017; OI Schaffler, Friedrich/0000-0002-7093-2554; Muhlberger, Michael/0000-0001-7542-8552 NR 30 TC 36 Z9 36 U1 1 U2 5 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 AUG PY 2005 VL 72 IS 8 AR 081313 DI 10.1103/PhysRevB.72.081313 PG 4 WC Physics, Condensed Matter SC Physics GA 960BG UT WOS:000231564600016 ER PT J AU Lashley, JC Lawson, A McQueeney, RJ Lander, GH AF Lashley, JC Lawson, A McQueeney, RJ Lander, GH TI Absence of magnetic moments in plutonium SO PHYSICAL REVIEW B LA English DT Article ID HEAT-CAPACITY; DELTA-PU; ELECTRONIC-STRUCTURE; ALPHA-PLUTONIUM; ANOMALOUS LANTHANIDES; THERMAL-EXPANSION; STABILIZED ALLOY; STATE PROPERTIES; SUSCEPTIBILITY; SCATTERING AB Many theories published in the last decade propose that either ordered or disordered local moments are present in elemental plutonium at low temperatures. We present new experimental data and review previous experimental results. None of the experiments provide any evidence for ordered or disordered magnetic moments (either static or dynamic) in plutonium at low temperatures, in either the alpha or delta phases. The experiments presented and discussed are magnetic susceptibility, electrical resistivity, nuclear magnetic resonance, specific heat, and both elastic and inelastic neutron scattering. Many recent calculations correctly predict experimentally observed atomic volumes, including that of delta-Pu. These calculations achieve observed densities by the localization of electrons, which then give rise to magnetic moments. However, localized magnetic moments have never been observed experimentally in Pu. A theory is needed that is in agreement with all the experimental observations. Two theories are discussed that might provide understanding of the ensemble of unusual properties of Pu, including the absence of experimental evidence for localized magnetic moments; an issue that has persisted for over 50 years. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. Commiss European Communities, JRC, Inst Transuranium Elements, Karlsruhe, Germany. RP Lashley, JC (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI McQueeney, Robert/A-2864-2016 OI McQueeney, Robert/0000-0003-0718-5602 NR 80 TC 130 Z9 130 U1 4 U2 16 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 AUG PY 2005 VL 72 IS 5 AR 054416 DI 10.1103/PhysRevB.72.054416 PG 12 WC Physics, Condensed Matter SC Physics GA 960BD UT WOS:000231564300092 ER PT J AU Lee, YS Segawa, K Li, ZQ Padilla, WJ Dumm, M Dordevic, SV Homes, CC Ando, Y Basov, DN AF Lee, YS Segawa, K Li, ZQ Padilla, WJ Dumm, M Dordevic, SV Homes, CC Ando, Y Basov, DN TI Electrodynamics of the nodal metal state in weakly doped high-T-c cuprates SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; MULTIMAGNON OPTICAL-ABSORPTION; QUANTUM CRITICAL-BEHAVIOR; UNDERDOPED YBA2CU3O6+X; INFRARED PROPERTIES; PSEUDOGAP STATE; CONDUCTIVITY; TRANSITION; RESONANCE; TRANSPORT AB We report on the detailed analysis of the infrared (IR) conductivity of two prototypical high-T-c systems YBa2Cu3Oy and La2-xSrxCuO4 throughout the complex phase diagram of these compounds. Our focus in this work is to thoroughly document the electromagnetic response of the nodal metal state which is initiated with only a few holes doped in parent antiferromagnetic systems and extends up to the pseudogap boundary in the phase diagram. The key signature of the nodal metal is the two-component conductivity: the Drude mode at low energies followed by a resonance in mid-IR. The Drude component can be attributed to the response of coherent quasiparticles residing on the Fermi arcs detected in photoemission experiments. The microscopic origin of the mid-IR band is yet to be understood. A combination of transport and IR data uncovers fingerprints of the Fermi liquid behavior in the response of the nodal metal. The comprehensive nature of the data sets presented in this work allows us to critically re-evaluate common approaches to the interpretation of the optical data. Specifically we re-examine the role of magnetic excitations in generating electronic self-energy effects through the analysis of the IR data in a high magnetic field. C1 Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA. Cent Res Inst Elect Power Ind, Komae, Tokyo 2018511, Japan. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA. RI Ando, Yoichi/B-8163-2013; SEGAWA, Kouji/D-4204-2014; Padilla, Willie/A-7235-2008; Dumm, Michael/N-4362-2016 OI Ando, Yoichi/0000-0002-3553-3355; SEGAWA, Kouji/0000-0002-3633-4809; Padilla, Willie/0000-0001-7734-8847; Dumm, Michael/0000-0002-3502-8615 NR 93 TC 100 Z9 100 U1 0 U2 9 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD AUG PY 2005 VL 72 IS 5 AR 054529 DI 10.1103/PhysRevB.72.054529 PG 13 WC Physics, Condensed Matter SC Physics GA 960BD UT WOS:000231564300152 ER PT J AU Maheswaran, S Thevuthasan, S Gao, F Shutthanandan, V Wang, CM Smith, RJ AF Maheswaran, S Thevuthasan, S Gao, F Shutthanandan, V Wang, CM Smith, RJ TI Misfit dislocations at the single-crystal Fe2O3/Al2O3 interface SO PHYSICAL REVIEW B LA English DT Article ID MOLECULAR-BEAM EPITAXY; THIN-FILMS; PHASE BOUNDARIES; GENERAL THEORY; IRON-OXIDE; GROWTH; FE3O4; ALPHA-FE2O3; GAMMA-FE2O3; DIFFUSION AB The buried interface of epitaxially grown alpha-Fe2O3(0001)/alpha-Al2O3(0001) has been studied using ion-scattering techniques and high-resolution transmission electron microscopy (HRTEM). The results reveal the existence of disordering at the interface attributed to misfit dislocations associated with lattice mismatch between the substrate and the film. Molecular dynamics (MD) calculations were carried out to understand the formation of misfit dislocations and the interface structural features. The calculations show that misfit dislocations form in the Al2O3 substrate and terminate at the interface, consistent with the experimental observations. Snapshots of the atomic positions generated by the MD calculations were used in Monte Carlo simulations of the ion channeling experiments. The hitting probabilities determined from these simulations are compared with the experimental surface and interface peaks obtained from the aligned Rutherford backscattering spectrometry (RBS) spectra. Combination of MD and the ion scattering simulations with RBS and HRTEM measurements show promising results in understanding the interface structures of this single crystal Fe2O3/Al2O3. C1 Univ Western Sydney, Sch Sci Food & Nutr, Nanoscale Org & Dynam Grp, Sydney, NSW 1797, Australia. Pacific NW Natl Lab, Richland, WA 99352 USA. Montana State Univ, Bozeman, MT USA. RP Maheswaran, S (reprint author), Univ Western Sydney, Sch Sci Food & Nutr, Nanoscale Org & Dynam Grp, Sydney, NSW 1797, Australia. RI Gao, Fei/H-3045-2012 NR 26 TC 3 Z9 3 U1 0 U2 1 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 AUG PY 2005 VL 72 IS 7 AR 075403 DI 10.1103/PhysRevB.72.075403 PG 7 WC Physics, Condensed Matter SC Physics GA 960BF UT WOS:000231564500156 ER PT J AU Martin, I Podolsky, D Kivelson, SA AF Martin, I Podolsky, D Kivelson, SA TI Enhancement of superconductivity by local inhomogeneities SO PHYSICAL REVIEW B LA English DT Article ID BI2SR2CACU2O8+DELTA; DENSITY; STATE AB We study the effect of inhomogeneity of the pairing interaction or the background potential on the superconducting transition temperature, T-c. In the weak coupling BCS regime, we find that inhomogeneity, which is incommensurate with the Fermi surface nesting vectors, enhances T-c relative to its value for the uniform system. For a fixed modulation strength we find that the highest T-c is reached when the characteristic modulation length scale is of the order of the superconducting coherence length. C1 Los Alamos Natl Lab, Theoret Div, Los Angeles, NM 87545 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Stanford Univ, Dept Phys, Stanford, CA 94305 USA. RP Martin, I (reprint author), Los Alamos Natl Lab, Theoret Div, Los Angeles, NM 87545 USA. RI Podolsky, Daniel/D-5576-2013 OI Podolsky, Daniel/0000-0001-6428-2957 NR 19 TC 44 Z9 44 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 AUG PY 2005 VL 72 IS 6 AR 060502 DI 10.1103/PhysRevB.72.060502 PG 4 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400018 ER PT J AU Mudryk, Y Holm, AP Gschneidner, KA Pecharsky, VK AF Mudryk, Y Holm, AP Gschneidner, KA Pecharsky, VK TI Crystal structure-magnetic property relationships of Gd5Ge4 examined by in situ x-ray powder diffraction SO PHYSICAL REVIEW B LA English DT Article ID NI-MN-GA; PHASE-TRANSITION; REFRIGERATION; GD-5(SI2GE2); ALLOYS; FIELD; GD-5(SIXGE1-X)(4); DIFFRACTOMETER; PEROVSKITES; SYSTEM AB Structural phase diagrams of Gd5Ge4 have been constructed during heating of a zero magnetic-field-cooled sample and during cooling in various constant magnetic fields using temperature (5-50 K) and magnetic field (0-3.5 T) dependent x-ray powder diffraction measurements. The structural results have been correlated with bulk magnetization measurements. Different experimental data are in excellent agreement with one another, thus indicating intimate relationships between the magnetic and crystal lattices in the material. C1 Iowa State Univ, Mat & Engn Phys Program, Ames Lab, US DOE, Ames, IA 50011 USA. Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA. RP Iowa State Univ, Mat & Engn Phys Program, Ames Lab, US DOE, Ames, IA 50011 USA. NR 52 TC 51 Z9 51 U1 0 U2 9 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD AUG PY 2005 VL 72 IS 6 AR 064442 DI 10.1103/PhysRevB.72.064442 PG 11 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400109 ER PT J AU Park, HS Zimmerman, JA AF Park, HS Zimmerman, JA TI Modeling inelasticity and failure in gold nanowires SO PHYSICAL REVIEW B LA English DT Article ID MOLECULAR-DYNAMICS; METAL NANOWIRES; QUANTIZED CONDUCTANCE; ATOMISTIC SIMULATION; FRACTURE; STRENGTH; SURFACES; COPPER; WIRES; RECONSTRUCTION AB We present numerical simulations of gold nanowires under tensile loading at various strain rates and wire sizes at room temperature. The simulations were performed using molecular dynamics modeling the gold nanowires using various forms of the embedded-atom method, and concentrated on investigating the yield and fracture properties of the nanowires. It is clearly demonstrated that the accurate modeling of stacking fault and surface energies is critical in capturing the fundamental deformation behavior of gold nanowires. By doing so, phenomena which have been observed both experimentally and numerically in first-principles calculations, such as the formation of atom-thick chains (ATCs) prior to fracture, zigzag, helical rotational motion of atoms within the ATCs, structural reorientation of the ATCs to a hexagonal crystal structure, and (111) faceting of the nanowire in the yielded neck region by the ATCs, are accurately captured. C1 Sandia Natl Labs, Livermore, CA 94551 USA. RP Park, HS (reprint author), Sandia Natl Labs, Livermore, CA 94551 USA. EM hpark@alumni.northwestern.edu; jzimmer@sandia.gov RI Zimmerman, Jonathan/A-8019-2012; Park, Harold/B-1525-2008 OI Park, Harold/0000-0001-5365-7776 NR 45 TC 175 Z9 176 U1 4 U2 32 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 AUG PY 2005 VL 72 IS 5 AR 054106 DI 10.1103/PhysRevB.72.054106 PG 9 WC Physics, Condensed Matter SC Physics GA 960BD UT WOS:000231564300043 ER PT J AU Park, T Sidorov, VA Lee, H Fisk, Z Thompson, JD AF Park, T Sidorov, VA Lee, H Fisk, Z Thompson, JD TI Pressure-tuned first-order phase transition and accompanying resistivity anomaly in CeZn1-delta Sb2 SO PHYSICAL REVIEW B LA English DT Article ID ORDER-DISORDER TRANSITION; ELECTRICAL RESISTIVITY; NEEL TEMPERATURE; CRITICAL-POINTS; ANTIFERROMAGNETISM; METALS AB The Kondo lattice system CeZn0.66Sb2 is studied by electrical resistivity and ac magnetic susceptibility measurements at several pressures. At P=0 kbar, ferromagnetic and antiferromagnetic transitions appear at 3.6 and 0.8 K, respectively. The electrical resistivity at T-N dramatically changes from the Fisher-Langer type (ferromagneticlike) to the Suezaki-Mori (SM) type near 17 kbar, i.e., from a positive divergence to a negative divergence in the temperature derivative of the resistivity. The pressure-induced SM-type anomaly, which shows thermal hysteresis, is easily suppressed by a small magnetic field (1.9 kOe for 19.8 kbar), indicating a weakly first-order nature of the transition. By subtracting a low-pressure data set, we directly compare the resistivity anomaly with the SM theory without any assumption on backgrounds, where the negative divergence in d rho/dT is ascribed to enhanced critical fluctuations in the presence of superzone gaps. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Vereshchagin Inst High Pressure Phys, Troitsk 142190, Russia. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. RP Park, T (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Park, Tuson/A-1520-2012 NR 18 TC 9 Z9 9 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 AUG PY 2005 VL 72 IS 6 AR 060410 DI 10.1103/PhysRevB.72.060410 PG 4 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400014 ER PT J AU Park, WK Greene, LH Sarrao, JL Thompson, JD AF Park, WK Greene, LH Sarrao, JL Thompson, JD TI Andreev reflection at the normal-metal/heavy-fermion superconductor CeCoIn5 interface SO PHYSICAL REVIEW B LA English DT Article ID POINT-CONTACT SPECTROSCOPY; UNCONVENTIONAL SUPERCONDUCTIVITY; TUNNELING SPECTROSCOPY; THERMAL-CONDUCTIVITY; ANGLE DEPENDENCE; UPT3; JUNCTIONS; TRANSPORT; STATES; ENHANCEMENT AB The dynamic conductance across nanoscale junctions consisting of a normal-metal (N) and a heavy-fermion superconductor (HFS) is measured over a wide temperature range (60 K to 400 mK). The N/HFS (Au/CeCoIn5) contact is shown to be in the Sharvin limit. The background conductance develops a gradual asymmetry with decreasing temperature starting at the heavy-fermion liquid coherence temperature, T-*similar to 45 K, to the onset of superconducting coherence, T-c=2.3 K. The enhanced subgap conductance observed below T-c arises from Andreev reflection. This enhancement is an order of magnitude smaller (similar to 13.3% at 400 mK) than that observed for N/conventional superconductors but consistent with other N/HFS data reported. Attempts to fit to the full conductance curve as a function of temperature with extended Blonder-Tinkham-Klapwijk models, including those that account for the breakdown of the Andreev approximation and renormalizations of the Fermi momenta, clearly show that existing models cannot account for our data. We provide a theoretical framework for understanding the N/HFS Andreev conversion process. C1 Univ Illinois, Dept Phys, Urbana, IL 61801 USA. Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Park, WK (reprint author), Univ Illinois, Dept Phys, 1110 W Green St, Urbana, IL 61801 USA. NR 50 TC 57 Z9 58 U1 0 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 AUG PY 2005 VL 72 IS 5 AR 052509 DI 10.1103/PhysRevB.72.052509 PG 4 WC Physics, Condensed Matter SC Physics GA 960BD UT WOS:000231564300033 ER PT J AU Piekarz, P Egami, T AF Piekarz, P Egami, T TI Dynamic charge transfer and spin-phonon interaction in high-T-c supeconductors SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; COPPER-OXIDE SUPERCONDUCTORS; SINGLE-PARTICLE EXCITATIONS; CUO2 PLANE; MACROSCOPIC POLARIZATION; CUPRATE SUPERCONDUCTORS; ELECTRON CORRELATION; HUBBARD-MODEL; DOPING STATES; QUANTUM PHASE AB The effects of the electron-phonon interaction on charge and spin dynamics are studied for the one-dimensional two-band Hubbard model by the exact diagonalization method. The parameters of the model are chosen to represent a hole-doped Cu-O system. Local charge fluctuations induced by phonons are expressed in terms of microscopic current and polarization, and it is shown that the dynamic charge transfer is strongly dependent on the phonon wave vector when the system is doped with holes. The dynamic magnetic structure factor is also found to be significantly modified by lattice distortion. In particular the lowest-energy spin excitations are greatly softened, indicating significant spin-phonon coupling. It is shown that the optical response is significantly modified as well due to coupling with the lattice over an energy range far exceeding the phonon energy. These results demonstrate the unconventional nature of the electron-phonon coupling in the strongly correlated electron systems. Its possible implications to the pairing mechanism in the cuprates are discussed. C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Polish Acad Sci, Inst Nucl Phys, Krakow, Poland. Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Piekarz, P (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. NR 61 TC 20 Z9 20 U1 1 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 AUG PY 2005 VL 72 IS 5 AR 054530 DI 10.1103/PhysRevB.72.054530 PG 9 WC Physics, Condensed Matter SC Physics GA 960BD UT WOS:000231564300153 ER PT J AU Porta, M Castan, T Planes, A Saxena, A AF Porta, M Castan, T Planes, A Saxena, A TI Precursor nanoscale modulations in ferromagnets: Modeling and thermodynamic characterization SO PHYSICAL REVIEW B LA English DT Article ID SHAPE-MEMORY ALLOYS; NI-AL; ELECTRON HOLOGRAPHY; MAGNETIC DOMAINS; DISORDER; BEHAVIOR; DRIVEN; TRANSFORMATIONS; FERROELECTRICS; NI2MNGA AB Using a Ginzburg-Landau model for the magnetic degrees of freedom with coupling to disorder, we demonstrate through simulations the existence of stripelike magnetic precursors recently observed in Co-Ni-Al alloys above the Curie temperature. We characterize these magnetic modulations by means of the temperature dependence of local magnetization distribution, magnetized volume fraction, and magnetic susceptibility. We also obtain a temperature-disorder strength phase diagram in which a magnetic tweed phase exists in a small region between the paramagnetic and dipolar phases. C1 Univ Barcelona, Dept Estructura & Constituents Mat, Barcelona 08028, Spain. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Porta, M (reprint author), Univ Barcelona, Dept Estructura & Constituents Mat, Diagonal 647, Barcelona 08028, Spain. RI Planes, Antoni/O-1904-2015; OI Planes, Antoni/0000-0001-5213-5714; Porta Tena, Marcel/0000-0001-7582-9671 NR 26 TC 4 Z9 4 U1 0 U2 7 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD AUG PY 2005 VL 72 IS 5 AR 054111 DI 10.1103/PhysRevB.72.054111 PG 8 WC Physics, Condensed Matter SC Physics GA 960BD UT WOS:000231564300048 ER PT J AU Punnoose, A Hays, J Thurber, A Engelhard, MH Kukkadapu, RK Wang, C Shutthanandan, V Thevuthasan, S AF Punnoose, A Hays, J Thurber, A Engelhard, MH Kukkadapu, RK Wang, C Shutthanandan, V Thevuthasan, S TI Development of high-temperature ferromagnetism in SnO2 and paramagnetism in SnO by Fe doping SO PHYSICAL REVIEW B LA English DT Article ID THIN-FILMS; MAGNETIC SEMICONDUCTORS; ROOM-TEMPERATURE; MOSSBAUER-SPECTROSCOPY; SIZE DEPENDENCE; TIN OXIDE; NANOPARTICLES; TRANSITION; SYSTEM; Y(CO1-XALX)2 AB We report the development of room-temperature ferromagnetism in chemically synthesized powder samples of Sn1-xFexO2 (0.005 <= x <= 0.05) and paramagnetic behavior in an identically synthesized set of Sn1-xFexO. The ferromagnetic Sn0.99Fe0.01O2 showed a Curie temperature T-C=850 K, which is among the highest reported for transition-metal-doped semiconductor oxides. With increasing Fe doping, the lattice parameters of SnO2 decreased and the saturation magnetization increased, suggesting a strong structure-magnetic property relationship. When the Sn0.95Fe0.05O2 was prepared at different temperatures between 200 and 900 degrees C, systematic changes in the magnetic properties were observed. Combined Mossbauer spectroscopy and magnetometry measurements showed a ferromagnetic behavior in Sn0.95Fe0.05O2 samples prepared at and above 350 degrees C, but the ferromagnetic component decreased gradually as preparation temperature approached 600 degrees C. All Sn0.95Fe0.05O2 samples prepared above 600 degrees C were paramagnetic. X-ray photoelectron spectroscopy, magnetometry, and particle induced x-ray emission studies showed that the Fe dopants diffuse towards the surface of the particles in samples prepared at higher temperatures, gradually destroying the ferromagnetism. Mossbauer studies showed that the magnetically ordered Fe3+ spins observed in the Sn0.95Fe0.05O2 sample prepared at 350 degrees C is only similar to 24% of the uniformly incorporated Fe3+. No evidence of any iron oxide impurity phases were detected in Sn1-xFexO2 or Sn1-xFexO, suggesting that the emerging magnetic interactions in these systems are most likely related to the properties of the host systems SnO2 and SnO, and their oxygen stoichiometry. C1 Boise State Univ, Dept Phys, Boise, ID 83725 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. RP Punnoose, A (reprint author), Boise State Univ, Dept Phys, Boise, ID 83725 USA. EM apunnoos@boisestate.edu RI Engelhard, Mark/F-1317-2010; OI Engelhard, Mark/0000-0002-5543-0812 NR 40 TC 147 Z9 149 U1 5 U2 37 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 AUG PY 2005 VL 72 IS 5 AR 054402 DI 10.1103/PhysRevB.72.054402 PG 14 WC Physics, Condensed Matter SC Physics GA 960BD UT WOS:000231564300078 ER PT J AU Ribeiro, FJ Neaton, JB Louie, SG Cohen, ML AF Ribeiro, FJ Neaton, JB Louie, SG Cohen, ML TI Mechanism for bias-assisted indium mass transport on carbon nanotube surfaces SO PHYSICAL REVIEW B LA English DT Article ID BORON-NITRIDE NANOTUBES; ELECTRON-GAS; ELECTROMIGRATION; PSEUDOPOTENTIALS; STATE AB In this paper, results of ab initio pseudopotential density-functional calculations of indium adsorption on graphitelike surfaces are presented. The adsorption energy was calculated as a function of In coverage, and it is shown that, for low surface densities, In becomes positively charged by donating about one electron to the underlying nanotube surface. This is consistent with experimental observations of bias-assisted In flux in the direction opposite to that of electron flow. The effects of nanotube surface curvature on In adsorption are shown to be small. Based on the calculated energy barrier between two neighboring energy minima and the calculated vibrational frequencies, the hopping rate for In adsorbed on graphene is estimated. It is also shown that In adsorption is stronger on and around a Stone-Wales defect on a graphene sheet, which suggests that defects can work as nucleation centers for crystal growth. Adsorption of In on BN sheets and of Au on graphene is also discussed. No significant charge transfer is present in these two alternative systems and the adsorption energies are weaker. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. RI Neaton, Jeffrey/F-8578-2015; OI Neaton, Jeffrey/0000-0001-7585-6135; Ribeiro, Filipe/0000-0003-3843-7702 NR 18 TC 19 Z9 19 U1 0 U2 8 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD AUG PY 2005 VL 72 IS 7 AR 075302 DI 10.1103/PhysRevB.72.075302 PG 8 WC Physics, Condensed Matter SC Physics GA 960BF UT WOS:000231564500089 ER PT J AU Rodriguez, JA Liu, P Gomes, J Nakamura, K Vines, F Sousa, C Illas, F AF Rodriguez, JA Liu, P Gomes, J Nakamura, K Vines, F Sousa, C Illas, F TI Interaction of oxygen with ZrC(001) and VC(001): Photoemission and first-principles studies SO PHYSICAL REVIEW B LA English DT Article ID TRANSITION-METAL CARBIDES; TOTAL-ENERGY CALCULATIONS; RAY PHOTOELECTRON-SPECTROSCOPY; WAVE BASIS-SET; ELECTRONIC-STRUCTURE; TUNGSTEN CARBIDE; BAND-STRUCTURE; CO ADSORPTION; 100 SURFACES; DENSITY AB High-resolution photoemission and first-principles density-functional calculations were used to study the interaction of oxygen with ZrC(001) and VC(001) surfaces. Atomic oxygen is present on the carbide substrates after small doses of O-2 at room temperature. At 500 K, the oxidation of the surfaces is fast and clear features for ZrOx or VOx are seen in the O(1s), Zr(3d), and V(2p(3/2)) core levels spectra, with an increase in the metal/carbon ratio of the samples. A big positive shift (1.3-1.6 eV) was detected for the C 1s core level in O/ZrC(001), indicating the existence of strong O <-> C or C <-> C interactions. A phenomenon corroborated by the results of first-principles calculations, which show a CZrZr hollow as the most stable site for the adsorption of O. Furthermore, the calculations also show that a C <-> O exchange is exothermic on ZrC(001), and the displaced C atoms bond to CZrZr sites. In the O/ZrC(001) interface, the surface C atoms play a major role in determining the behavior of the system. In contrast, the adsorption of oxygen induces very minor changes in the C(1s) spectrum of VC(001). The O <-> V interactions are stronger than the O <-> Zr interactions, and O <-> C interactions do not play a dominant role in the O/VC(001) interface. In this system, C <-> O exchange is endothermic. VC(001) has a larger density of metal d states near the Fermi level than ZrC(001), but the rate of oxidation of VC(001) is slower. Therefore the O/ZrC(001) and O/VC(001) systems illustrate two different types of pathways for the oxidation of carbide surfaces. C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan. Univ Barcelona, Dept Quim Fis, E-08028 Barcelona, Spain. Univ Barcelona, Ctr Especial Recerca Quim Teor, E-08028 Barcelona, Spain. RP Rodriguez, JA (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. EM rodrigez@bnl.gov RI Sousa, Carmen/F-4105-2011; Illas, Francesc /C-8578-2011; OI Sousa, Carmen/0000-0002-1915-1111; Illas, Francesc /0000-0003-2104-6123; Vines, Francesc/0000-0001-9987-8654 NR 64 TC 26 Z9 26 U1 1 U2 18 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 AUG PY 2005 VL 72 IS 7 AR 075427 DI 10.1103/PhysRevB.72.075427 PG 11 WC Physics, Condensed Matter SC Physics GA 960BF UT WOS:000231564500180 ER PT J AU Schrier, J Whaley, KB AF Schrier, J Whaley, KB TI Atomistic theory of coherent spin transfer between molecularly bridged quantum dots SO PHYSICAL REVIEW B LA English DT Article ID EXTENDED HUCKEL THEORY; TOTAL-ENERGY METHOD; TIGHT-BINDING; SEMICONDUCTOR NANOCRYSTALS; CDSE NANOCRYSTALS; NOBLE-METALS; ELECTRONICS; INTERFERENCE; HYDROCARBONS; SPECTROSCOPY AB Time-resolved Faraday rotation experiments have demonstrated coherent transfer of electron spin between CdSe colloidal quantum dots coupled by conjugated molecules. We employ here a Green's-function approach, using semiempirical tight binding to treat the nanocrystal Hamiltonian and extended Huckel theory to treat the linking molecule Hamiltonian, to obtain the coherent transfer probabilities from atomistic calculations, without the introduction of any new parameters. Calculations on 1,4-dithiolbenzene, 1,4-dithiolcyclohexane, and 1,6-dithiolhexane linked nanocrystals agree qualitatively with experiment and provide support for a previous transfer Hamiltonian model. We find a striking dependence on the transfer probabilities as a function of nanocrystal surface site attachment and linking molecule conformation. Additionally, we predict quantum interference effects in the coherent transfer probabilities for 2,7-dithiolnaphthalene and 2,6-dithiolnaphthalene linking molecules. We suggest possible experiments based on these results that would test the coherent, through-molecule transfer mechanism. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Pitzer Ctr Theoret Chem, Berkeley, CA 94720 USA. RP Schrier, J (reprint author), Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA. RI Schrier, Joshua/B-6838-2009 NR 45 TC 4 Z9 4 U1 0 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 AUG PY 2005 VL 72 IS 8 AR 085320 DI 10.1103/PhysRevB.72.085320 PG 8 WC Physics, Condensed Matter SC Physics GA 960BG UT WOS:000231564600100 ER PT J AU Seo, HW Chen, QY Iliev, MN Johansen, TH Kolev, N Welp, U Wang, C Chu, WK AF Seo, HW Chen, QY Iliev, MN Johansen, TH Kolev, N Welp, U Wang, C Chu, WK TI Chain-oxygen ordering in twin-free YBa2Cu3O7-delta single crystals driven by 20-keV electron irradiation SO PHYSICAL REVIEW B LA English DT Article ID X-RAY-SCATTERING; THIN-FILMS; UNTWINNED YBA2CU3O7-DELTA; RAMAN-SPECTROSCOPY; PHASE-SEPARATION; LOCAL-STRUCTURE; YBA2CU3O6+X; STATE AB We have examined the effects of 20-keV electron irradiation on the [-Cu(1)-O(1)-](n) chain-oxygen arrangements in oxygen-deficient but otherwise twin-free YBa2Cu3O7-delta single crystals. Comparison of polarized Raman spectra of nonirradiated and irradiated areas provides evidence that electron bombardments instigate the collective hopping of oxygen atoms either from an interstitial at O(5) site to a vacant O(1) chain site or by reshuffling the chain segments to extend the average length of chains without changing the overall oxygen content. This oxygen ordering effect, while counterintuitive, is analogous to that found in photoexcitation-induced ordering in which temporal charge imbalance from electron-hole pair creation by inelastic scattering of incident electrons causes a local lattice distortion which brings on the atomic rearrangements. C1 Univ Houston, Dept Phys, Houston, TX 77004 USA. Univ Houston, Ctr Supercond, Houston, TX USA. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Oslo, Dept Phys, N-0316 Oslo, Norway. RP Seo, HW (reprint author), Univ Houston, Dept Phys, Houston, TX 77004 USA. EM hseo@uh.edu RI ILIEV, MILKO/A-5941-2008 OI ILIEV, MILKO/0000-0002-9685-542X NR 33 TC 9 Z9 9 U1 0 U2 6 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 AUG PY 2005 VL 72 IS 5 AR 052501 DI 10.1103/PhysRevB.72.052501 PG 4 WC Physics, Condensed Matter SC Physics GA 960BD UT WOS:000231564300025 ER PT J AU Strack, C Akinci, C Pashchenko, V Wolf, B Uhrig, E Assmus, W Lang, M Schreuer, J Wiehl, L Schlueter, JA Wosnitza, J Schweitzer, D Muller, J Wykhoff, J AF Strack, C Akinci, C Pashchenko, V Wolf, B Uhrig, E Assmus, W Lang, M Schreuer, J Wiehl, L Schlueter, JA Wosnitza, J Schweitzer, D Muller, J Wykhoff, J TI Resistivity studies under hydrostatic pressure on a low-resistance variant of the quasi-two-dimensional organic superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br: Search for intrinsic scattering contributions SO PHYSICAL REVIEW B LA English DT Article ID BEDT-TTF; TRANSPORT-PROPERTIES; HEAVY-FERMION; ELECTRICAL-RESISTIVITY; TRANSITION; TEMPERATURE; NMR; DEPENDENCE; PHASE; ESR AB Resistivity measurements have been performed on a low (LR)- and high (HR)-resistance variant of the kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br superconductor. While the HR sample was synthesized following the standard procedure, the LR crystal is a result of a somewhat modified synthesis route. Judging by their residual resistivities and residual resistivity ratios, the LR crystal is of distinctly superior quality. He-gas pressure was used to study the effect of hydrostatic pressure on the different transport regimes for both variants. The main results of these comparative investigations are (i) a significant part of the inelastic-scattering contribution, which causes the anomalous rho(T) maximum in standard HR crystals around 90 K, is sample dependent, i.e., extrinsic in nature; (ii) the abrupt change in rho(T) at T-*approximate to 40 K from a strongly temperature-dependent behavior at T > T-* to an only weakly T-dependent rho(T) at T < T-* is unaffected by this scattering contribution and thus marks an independent property, most likely a second-order phase transition, and (iii) both variants reveal a rho(T)proportional to AT(2) dependence at low temperatures, i.e., for T-c <= T <= T-0, although with strongly sample-dependent coefficients A and upper bounds for the T-2 behavior measured by T-0. Provided that there are no differences in the Fermi surface between both variants-the present experiments give no indications for such differences-the latter result is inconsistent with the T-2 dependence originating from coherent Fermi-liquid excitations. C1 Goethe Univ Frankfurt, Inst Phys, D-60054 Frankfurt, Germany. Goethe Univ Frankfurt, Inst Mineral, D-60054 Frankfurt, Germany. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Tech Univ Dresden, Inst Festkorperphys, D-01062 Dresden, Germany. Univ Stuttgart, Inst Phys 3, D-70550 Stuttgart, Germany. Florida State Univ, Ctr Mat Res & Technol, Tallahassee, FL 32306 USA. Max Planck Inst Chem Phys Fester Stoffe, D-01187 Dresden, Germany. RP Goethe Univ Frankfurt, Inst Phys, FOR 412, D-60054 Frankfurt, Germany. RI Schreuer, Juergen/F-7843-2011 NR 56 TC 46 Z9 46 U1 2 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 AUG PY 2005 VL 72 IS 5 AR 054511 DI 10.1103/PhysRevB.72.054511 PG 10 WC Physics, Condensed Matter SC Physics GA 960BD UT WOS:000231564300134 ER PT J AU Tamai, A Seitsonen, AP Fasel, R Shen, ZX Osterwalder, J Greber, T AF Tamai, A Seitsonen, AP Fasel, R Shen, ZX Osterwalder, J Greber, T TI Doping-induced reorientation of C-60 molecules on Ag(111) SO PHYSICAL REVIEW B LA English DT Article ID DOPED C-60; ELECTRONIC-PROPERTIES; SUPERCONDUCTING K3C60; BAND-STRUCTURE; ORIENTATION; SURFACE; DIFFRACTION; FULLERENES; MONOLAYERS; CU(111) AB X-ray photoelectron diffraction reveals that C-60 molecules adsorbed in a monolayer on Ag(111) take different orientations depending on the level of potassium doping. For half filling (K3C60) and complete filling (K6C60) of the lowest unoccupied molecular orbital, two distinct orientations are identified, exposing a hexagon or a 6-6 bond to the surface, respectively. For all the intermediate doping levels, the two orientations coexist, which is consistent with phase separation. Characteristic changes in the density of states, calculated for the two orientations within density functional theory, suggest intermolecular electron hopping as a driving force for the molecular reorientation. C1 Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland. Univ Zurich, Inst Chem Phys, CH-8057 Zurich, Switzerland. EMPA, Swiss Fed Labs Mat Testing & Res, CH-8600 Dubendorf, Switzerland. Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA. RP Tamai, A (reprint author), Univ Zurich, Inst Phys, Winterthurerstr 190, CH-8057 Zurich, Switzerland. EM tamai@physik.unizh.ch RI Tamai, Anna/A-5166-2008; Seitsonen, Ari/B-1552-2009; Fasel, Roman/B-5396-2011; Tamai, Anna/B-9219-2014; Greber, Thomas/D-9509-2015 OI Seitsonen, Ari/0000-0003-4331-0650; Fasel, Roman/0000-0002-1553-6487; Tamai, Anna/0000-0001-5239-6826; Greber, Thomas/0000-0002-5234-1937 NR 27 TC 20 Z9 20 U1 0 U2 6 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 AUG PY 2005 VL 72 IS 8 AR 085421 DI 10.1103/PhysRevB.72.085421 PG 5 WC Physics, Condensed Matter SC Physics GA 960BG UT WOS:000231564600148 ER PT J AU Thomson, T Lee, SL Toney, MF Dewhurst, CD Ogrin, FY Oates, CJ Sun, S AF Thomson, T Lee, SL Toney, MF Dewhurst, CD Ogrin, FY Oates, CJ Sun, S TI Agglomeration and sintering in annealed FePt nanoparticle assemblies studied by small angle neutron scattering and x-ray diffraction SO PHYSICAL REVIEW B LA English DT Article ID GROWTH TEMPERATURE-DEPENDENCE; PERCUS-YEVICK FLUID; MAGNETIC-PROPERTIES; DISTRIBUTED DIAMETERS; THIN-FILMS; MODEL; REDUCTION; MEDIA; AG AB In this work we give a detailed account of complementary small angle neutron scattering and x-ray diffraction studies of polymer mediated, self-assembled FePt nanoparticle arrays as a function of annealing temperature. The combination of these two techniques provides significantly greater physical insight than is available using either individually. Since both methods integrate over a large number of particles statistically meaningful data can be obtained in contrast to imaging techniques where typically only small areas are analyzed. The data show that the median particle size increases with annealing at temperatures of 580 degrees C and above. The data also demonstrate that the distribution of particle diameters is significant and increases with annealing temperature. These results allow a comprehensive structural model of the annealed assemblies to be developed in terms of particle sintering and agglomeration. This enhanced understanding will allow new strategies to be pursued in realizing the potential of nanoparticle assemblies as a monodispersed data storage medium. C1 Hitachi Jose Res Ctr, San Jose, CA 95120 USA. Univ St Andrews, Dept Phys & Astron, St Andrews KY16 9SS, Fife, Scotland. Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. Inst Laue Langevin, F-38042 Grenoble, France. Univ Exeter, Sch Phys, Exeter EX4 4QL, Devon, England. IBM Corp, TJ Watson Res Ctr, Yorktown Hts, NY 10598 USA. RP Thomson, T (reprint author), Hitachi Jose Res Ctr, 650 Harry Rd, San Jose, CA 95120 USA. RI Lee, Stephen/G-9791-2016 OI Lee, Stephen/0000-0002-2020-3310 NR 44 TC 30 Z9 31 U1 0 U2 12 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 AUG PY 2005 VL 72 IS 6 AR 064441 DI 10.1103/PhysRevB.72.064441 PG 7 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400108 ER PT J AU Tobin, JG Moore, KT Chung, BW Wall, MA Schwartz, AJ van der Laan, G Kutepov, AL AF Tobin, JG Moore, KT Chung, BW Wall, MA Schwartz, AJ van der Laan, G Kutepov, AL TI Competition between delocalization and spin-orbit splitting in the actinide 5f states SO PHYSICAL REVIEW B LA English DT Article ID DELTA-PLUTONIUM; GROUND-STATE; URANIUM-COMPOUNDS; BRANCHING RATIO; METALS; ELECTRONS; PU; PHOTOEMISSION; SPECTRA; LOCALIZATION AB Synchrotron-radiation-based x-ray absorption, electron energy-loss spectroscopy in a transmission electron microscope, multielectronic atomic spectral simulations, and improved first-principles calculations (generalized gradient approximation in the local density approximation) have been used to investigate the electronic structure of the light actinides: alpha-Th, alpha-U, and alpha-Pu. It will be shown that the spin-orbit interaction can be used as a measure of the degree of localization of valence electrons in a material. The spin-orbit interaction in the light actinide metals alpha-Th, alpha-U, and alpha-Pu, has been determined using the branching ratio of the white line peaks of the N-4,N-5 edges, which correspond to 4d -> 5f transitions. Examination of the branching ratios and spin-orbit interaction shows that the apparent spin-orbit splitting is partially quenched in alpha-U, but is strongly dominant in alpha-Pu. These results are fully quantified using the sum rule. This picture of the actinide 5f electronic structure is confirmed by comparison with the results of electronic structure calculations for alpha-Th, alpha-U, and alpha-Pu, which in turn are supported by a previous bremsstrahlung isochromat spectroscopy experiment. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. SERC, Daresbury Lab, Synchrotron Radiat Source, Warrington WA4 4AD, Cheshire, England. Russian Fed Nucl Ctr, Inst Tech Phys, Snezhinsk, Chelabinsk Reg, Russia. RP Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RI Chung, Brandon/G-2929-2012; Tobin, James/O-6953-2015; van der Laan, Gerrit/Q-1662-2015 OI van der Laan, Gerrit/0000-0001-6852-2495 NR 58 TC 54 Z9 54 U1 2 U2 24 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 AUG PY 2005 VL 72 IS 8 AR 085109 DI 10.1103/PhysRevB.72.085109 PG 11 WC Physics, Condensed Matter SC Physics GA 960BG UT WOS:000231564600034 ER PT J AU Wong, J Krisch, M Farber, DL Occelli, F Xu, R Chiang, TC Clatterbuck, D Schwartz, AJ Wall, M Boro, C AF Wong, J Krisch, M Farber, DL Occelli, F Xu, R Chiang, TC Clatterbuck, D Schwartz, AJ Wall, M Boro, C TI Crystal dynamics of delta fcc Pu-Ga alloy by high-resolution inelastic x-ray scattering SO PHYSICAL REVIEW B LA English DT Article ID LATTICE-DYNAMICS; ELASTIC-CONSTANTS; GAMMA-CE; PLUTONIUM; PHASE; VIBRATION; PALLADIUM; ELECTRONS; SPECTRUM; ELEMENTS AB We have used a microbeam on large grain sample concept to carry out inelastic x-ray scattering experiments to measure the phonon dispersion curves of a fcc delta-phase Pu-Ga alloy along the main symmetry directions of the cubic lattice. This approach obviates experimental difficulties with conventional inelastic neutron scattering due to the high absorption cross section of the common Pu-239 isotope and the nonavailability of large (millimeter size) single crystal materials for Pu and its alloys. A classical Born-von Karman force constant model was used to model the experimental results, and up to fourth nearest neighbor interactions had to be included to obtain sufficient agreement. Several unusual features including, a large elastic anisotropy, a small shear elastic modulus (C-11-C-12)/2, a positive kink in the T-1[0 xi xi] branch, and a pronounced bending (toward lower energy) of the T[xi xi xi] branch near the L point in the Brillouin zone are found. These features are discussed in light of the various phase transformations of delta plutonium. The phonon dispersion data also provide a critical test and benchmark for theoretical treatments of highly correlated 5f electron systems. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. European Synchrotron Radiat Facil, F-38043 Grenoble, France. Univ Illinois, Dept Phys, Urbana, IL 61801 USA. Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA. RP Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA. EM wong10@llnl.gov RI Farber, Daniel/F-9237-2011; Chiang, Tai/H-5528-2011; Xu, Ruqing/K-3586-2012 OI Xu, Ruqing/0000-0003-1037-0059 NR 59 TC 23 Z9 26 U1 1 U2 15 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 AUG PY 2005 VL 72 IS 6 AR 064115 DI 10.1103/PhysRevB.72.064115 PG 12 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400045 ER PT J AU Woo, HJ Boothroyd, AT Nakajima, K Perring, TG Frost, CD Freeman, PG Prabhakaran, D Yamada, K Tranquada, JM AF Woo, HJ Boothroyd, AT Nakajima, K Perring, TG Frost, CD Freeman, PG Prabhakaran, D Yamada, K Tranquada, JM TI Mapping spin-wave dispersions in stripe-ordered La2-xSrxNiO4 (x=0.275, 0.333) SO PHYSICAL REVIEW B LA English DT Article ID TRANSITION-TEMPERATURE SUPERCONDUCTOR; LAMELLAR COPPER OXIDES; NEUTRON-DIFFRACTION; HALDANE-GAP; EXCITATIONS; CHARGE; DYNAMICS; ANTIFERROMAGNETS; LA2NIO4+DELTA; PHASE AB Using the MAPS spectrometer at the ISIS spallation source, we have measured the magnetic excitations of single-crystal samples of stripe-ordered La2-xSrxNiO4 with x=0.333 and 0.275. The full two-dimensional spin-wave dispersions were obtained using incident energies of 60 and 160 meV. To analyze the excitations, we have evaluated a spin-only Hamiltonian describing diagonal, site-centered stripes in the linear spin-wave approximation. Besides the superexchange energy J within antiferromagnetic domains, we have considered effective exchange couplings J(1) and J(2) across a charge stripe coupling second-neighbor Ni sites along Ni-O bond directions and along the plaquette diagonal, respectively. From least-squares fits of the model to the measurements on the x=1/3 sample at T=10 K, we find that the dispersions are well described by a model using just J and J(1), but not J and J(2). Consistent with an analysis of previous measurements, we find that J is about 90% of the superexchange energy of undoped La2NiO4 and J(1)/J approximate to 0.5. The excitations observed for x=0.275 are surprisingly similar to those for x=1/3, despite the differing magnetic-ordering wave vectors; the main difference is a broadening of the excitations for x=0.275. For both samples, we find that one spin-wave branch has a gap of similar to 20 meV, confirming a previous observation for x=1/3. We discuss the possible origin of this gap. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England. Univ Oxford, Dept Phys, Oxford OX1 3PU, England. Japan Atom Energy Res Inst, Neutron Sci Res Ctr, Tokai, Ibaraki 3191195, Japan. Tohoku Univ, Mat Res Inst, Sendai, Miyagi 9808577, Japan. RP Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RI Yamada, Kazuyoshi/C-2728-2009; Tranquada, John/A-9832-2009; Freeman, Paul/F-5372-2014 OI Tranquada, John/0000-0003-4984-8857; Freeman, Paul/0000-0002-5376-8940 NR 60 TC 39 Z9 39 U1 1 U2 14 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 AUG PY 2005 VL 72 IS 6 AR 064437 DI 10.1103/PhysRevB.72.064437 PG 13 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400104 ER PT J AU Xu, CK Moore, JE AF Xu, CK Moore, JE TI Geometric criticality for transitions between plaquette phases in integer-spin kagome XXZ antiferromagnets SO PHYSICAL REVIEW B LA English DT Article ID HEISENBERG-ANTIFERROMAGNET; LATTICE; FLUCTUATIONS; ORDER AB The phase diagram of the uniaxially anisotropic s=1 antiferromagnet on the kagome lattice includes a critical line exactly described by the classical three-color model. This line is distinct from the standard geometric classical criticality that appears in the classical limit (s ->infinity) of the two-dimensional XY model; the s=1 geometric T=0 critical line separates two unconventional plaquette-ordered phases that survive to nonzero temperature. The experimentally important correlations at finite temperature and the nature of the transitions into these ordered phases are obtained using the mapping to the three-color model and a combination of perturbation theory and a variational ansatz for the ordered phases. The ordered phases show sixfold symmetry breaking and are similar to phases proposed for the honeycomb lattice dimer model and s=1/2 XXZ model. The same mapping and phase transition can be realized also for integer spins s >= 2 but then require strong on-site anisotropy in the Hamiltonian. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Xu, CK (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. RI Moore, Joel/O-4959-2016 OI Moore, Joel/0000-0002-4294-5761 NR 24 TC 10 Z9 10 U1 3 U2 6 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 AUG PY 2005 VL 72 IS 6 AR 064455 DI 10.1103/PhysRevB.72.064455 PG 5 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400122 ER PT J AU Yethiraj, M Christen, DK Gapud, AA Paul, DM Crowe, SJ Dewhurst, CD Cubitt, R Porcar, L Gurevich, A AF Yethiraj, M Christen, DK Gapud, AA Paul, DM Crowe, SJ Dewhurst, CD Cubitt, R Porcar, L Gurevich, A TI Temperature and field dependence of the flux-line-lattice symmetry in V3Si SO PHYSICAL REVIEW B LA English DT Article ID VORTEX LATTICES; SUPERCONDUCTORS; YNI2B2C; TRANSITION; ERNI2B2C AB In V3Si, a first-order structural phase transition from hexagonal to square flux-line lattice occurs at approximately 1 T with H parallel to to the a axis. In this paper, we demonstrate the reentrant structural transition in the flux-line lattice, which reverts to hexagonal symmetry as the magnetic field approached H-c2(T). This behavior is described very well by a nonlocal London theory with thermal fluctuations. The phase diagram of the flux lattice topology is mapped out for this geometry. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Warwick, Coventry CV4 7AL, W Midlands, England. Inst Laue Langevin, Grenoble, France. NIST, NCNR, Gaithersburg, MD 20899 USA. Univ Wisconsin, Madison, WI 53706 USA. RP Yethiraj, M (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. RI cubitt, robert/B-9408-2008; Gurevich, Alex/A-4327-2008; OI Gurevich, Alex/0000-0003-0759-8941; Gapud, Albert/0000-0001-9048-9230 NR 24 TC 20 Z9 20 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 AUG PY 2005 VL 72 IS 6 AR 060504 DI 10.1103/PhysRevB.72.060504 PG 4 WC Physics, Condensed Matter SC Physics GA 960BE UT WOS:000231564400020 ER PT J AU Zheng, JC AF Zheng, JC TI Superhard hexagonal transition metal and its carbide and nitride: Os, OsC, and OsN SO PHYSICAL REVIEW B LA English DT Article ID BN SOLID-SOLUTIONS; ELECTRONIC-PROPERTIES; HIGH-PRESSURE; STATE; EQUATION; ENERGY; GAS AB Recent experimental findings suggest that the bulk modulus of osmium is comparable to that of diamond. From first principles calculations we examine the compressibility of diamond, Os, OsC, OsN, and OsO2 as well as cubic BN under pressure. We show that Os, OsC, and OsN in the hexagonal structures are less compressible than their cubic phases. The bulk moduli of hexagonal Os, cubic Os, and hexagonal OsC are smaller than that of diamond but larger than cubic BN. Our results indicate that the hexagonal OsC is a promising superhard material. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Univ Cambridge, Cavendish Lab, Cambridge CB3 0H3, England. RP Brookhaven Natl Lab, Upton, NY 11973 USA. RI Zheng, JC/G-3383-2010 OI Zheng, JC/0000-0002-6292-3236 NR 28 TC 100 Z9 103 U1 1 U2 14 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 AUG PY 2005 VL 72 IS 5 AR 052105 DI 10.1103/PhysRevB.72.052105 PG 4 WC Physics, Condensed Matter SC Physics GA 960BD UT WOS:000231564300005 ER PT J AU Zhou, CG Berciu, M AF Zhou, CG Berciu, M TI Correlated mesoscopic fluctuations in integer quantum Hall transitions SO PHYSICAL REVIEW B LA English DT Article ID CONDUCTANCE FLUCTUATIONS; RESISTANCE FLUCTUATIONS; PLATEAU TRANSITIONS; MAGNETIC-FIELD; EDGE STATES; LOCALIZATION AB We investigate the origin of the resistance fluctuations of mesoscopic samples, near transitions between quantum Hall plateaus. These fluctuations have been recently observed experimentally by E. Peled [Phys. Rev. Lett. 90, 246802 (2003); 90, 236802 (2003); Phys. Rev. B 69, 241305(R) (2004)]. We perform realistic first-principles simulations using a six-terminal geometry and sample sizes similar to those of real devices, to model the actual experiment. We present the theory and implementation of these simulations, which are based on the linear response theory for noninteracting electrons. The Hall and longitudinal resistances extracted from the Landauer formula exhibit all the observed experimental features. We give a unified explanation for the three regimes with distinct types of fluctuations observed experimentally, based on a simple generalization of the Landauer-Buttiker model. The transport is shown to be determined by the interplay between tunneling and chiral currents. We identify the central part of the transition, at intermediate filling factors, as the critical region where the localization length is larger than the sample size. C1 Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA. Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada. RP Oak Ridge Natl Lab, Div Math & Comp Sci, POB 2008,MS 6164, Oak Ridge, TN 37831 USA. RI Berciu, Mona/O-4889-2014 NR 30 TC 6 Z9 6 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 AUG PY 2005 VL 72 IS 8 AR 085306 DI 10.1103/PhysRevB.72.085306 PG 17 WC Physics, Condensed Matter SC Physics GA 960BG UT WOS:000231564600086 ER PT J AU Adler, SS Afanasiev, S Aidala, C Ajitanand, NN Akiba, Y Alexander, J Amirikas, R Aphecetche, L Aronson, SH Averbeck, R Awes, TC Azmoun, R Babintsev, V Baldisseri, A Barish, KN Barnes, PD Bassalleck, B Bathe, S Batsouli, S Baublis, V Bazilevsky, A Belikov, S Berdnikov, Y Bhagavatula, S Boissevain, JG Borel, H Borenstein, S Brooks, ML Brown, DS Bruner, N Bucher, D Buesching, H Bumazhnov, V Bunce, G Burward-Hoy, JM Butsyk, S Camard, X Chai, JS Chand, P Chang, WC Chernichenko, S Chi, CY Chiba, J Chiu, M Choi, IJ Choi, J Choudhury, RK Chujo, T Cianciolo, V Cobigo, Y Cole, BA Constantin, P d'Enterria, D David, G Delagrange, H Denisov, A Deshpande, A Desmond, EJ Devismes, A Dietzsch, O Drapier, O Drees, A Drees, KA du Rietz, R Durum, A Dutta, D Efremenko, YV Chenawi, KE Enokizono, A En'yo, H Esumi, S Ewell, L Fields, DE Fleuret, F Fokin, SL Fox, BD Fraenkel, Z Frantz, JE Franz, A Frawley, AD Fung, SY Garpman, S Ghosh, TK Glenn, A Gogiberidze, G Gonin, M Gosset, J Goto, Y de Cassagnac, RG Grau, N Greene, SV Perdekamp, MG Guryn, W Gustafsson, HA Hachiya, T Haggerty, JS Hamagaki, H Hansen, AG Hartouni, EP Harvey, M Hayano, R Hayashi, N He, X Heffner, M Hemmick, TK Heuser, JM Hibino, M Hill, JC Holzmann, W Homma, K Hong, B Hoover, A Ichihara, T Ikonnikov, VV Imai, K Isenhower, D Ishihara, M Issah, M Isupov, A Jacak, BV Jang, WY Jeong, Y Jia, J Jinnouchi, O Johnson, BM Johnson, SC Joo, KS Jouan, D Kametani, S Kamihara, N Kang, JH Kapoor, SS Katou, K Kelly, S Khachaturov, B Khanzadeev, A Kikuchi, J Kim, DH Kim, DJ Kim, DW Kim, E Kim, GB Kim, HJ Kistenev, E Kiyomichi, A Kiyoyama, K Klein-Boesing, C Kobayashi, H Kochenda, L Kochetkov, V Koehler, D Kohama, T Kopytine, M Kotchetkov, D Kozlov, A Kroon, PJ Kuberg, CH Kurita, K Kuroki, Y Kweon, MJ Kwon, Y Kyle, GS Lacey, R Ladygin, V Lajoie, JG Lebedev, A Leckey, S Lee, DM Lee, S Leitch, MJ Li, XH Lim, H Litvinenko, A Liu, MX Liu, Y Maguire, CF Makdisi, YI Malakhov, A Manko, VI Mao, Y Martinez, G Marx, MD Masui, H Matathias, F Matsumoto, T McGaughey, PL Melnikov, E Messer, F Miake, Y Milan, J Miller, TE Milov, A Mioduszewski, S Mischke, RE Mishra, GC Mitchell, JT Mohanty, AK Morrison, DP Moss, JM Muhlbacher, F Mukhopadhyay, D Muniruzzaman, M Murata, J Nagamiya, S Nagle, JL Nakamura, T Nandi, BK Nara, M Newby, J Nilsson, P Nyanin, AS Nystrand, J O'Brien, E Ogilvie, CA Ohnishi, H Ojha, ID Okada, K Ono, M Onuchin, V Oskarsson, A Otterlund, I Oyama, K Ozawa, K Pal, D Palounek, APT Pantuev, V Papavassiliou, V Park, J Parmar, A Pate, SF Peitzmann, T Peng, JC Peresedov, V Pinkenburg, C Pisani, RP Plasil, F Purschke, ML Purwar, AK Rak, J Ravinovich, I Read, KF Reuter, M Reygers, K Riabov, V Riabov, Y Roche, G Romana, A Rosati, M Rosnet, P Ryu, SS Sadler, ME Saito, N Sakaguchi, T Sakai, M Sakai, S Samsonov, V Sanfratello, L Santo, R Sato, HD Sato, S Sawada, S Schutz, Y Semenov, V Seto, R Shaw, MR Shea, TK Shibata, TA Shigaki, K Shiina, T Silva, CL Silvermyr, D Sim, KS Singh, CP Singh, V Sivertz, M Soldatov, A Soltz, RA Sondheim, WE Sorensen, SP Sourikova, IV Staley, F Stankus, PW Stenlund, E Stepanov, M Ster, A Stoll, SP Sugitate, T Sullivan, JP Takagui, EM Taketani, A Tamai, M Tanaka, KH Tanaka, Y Tanida, K Tannenbaum, MJ Tarjan, P Tepe, JD Thomas, TL Tojo, J Torii, H Towell, RS Tserruya, I Tsuruoka, H Tuli, SK Tydesjo, H Tyurin, N van Hecke, HW Velkovska, J Velkovsky, M Veszpremi, V Villatte, L Vinogradov, AA Volkov, MA Vznuzdaev, E Wang, XR Watanabe, Y White, SN Wohn, FK Woody, CL Xie, W Yang, Y Yanovich, A Yokkaichi, S Young, GR Yushmanov, IE Zajc, WA Zhang, C Zhou, S Zhou, SJ Zolin, L AF Adler, SS Afanasiev, S Aidala, C Ajitanand, NN Akiba, Y Alexander, J Amirikas, R Aphecetche, L Aronson, SH Averbeck, R Awes, TC Azmoun, R Babintsev, V Baldisseri, A Barish, KN Barnes, PD Bassalleck, B Bathe, S Batsouli, S Baublis, V Bazilevsky, A Belikov, S Berdnikov, Y Bhagavatula, S Boissevain, JG Borel, H Borenstein, S Brooks, ML Brown, DS Bruner, N Bucher, D Buesching, H Bumazhnov, V Bunce, G Burward-Hoy, JM Butsyk, S Camard, X Chai, JS Chand, P Chang, WC Chernichenko, S Chi, CY Chiba, J Chiu, M Choi, IJ Choi, J Choudhury, RK Chujo, T Cianciolo, V Cobigo, Y Cole, BA Constantin, P d'Enterria, D David, G Delagrange, H Denisov, A Deshpande, A Desmond, EJ Devismes, A Dietzsch, O Drapier, O Drees, A Drees, KA du Rietz, R Durum, A Dutta, D Efremenko, YV Chenawi, KE Enokizono, A En'yo, H Esumi, S Ewell, L Fields, DE Fleuret, F Fokin, SL Fox, BD Fraenkel, Z Frantz, JE Franz, A Frawley, AD Fung, SY Garpman, S Ghosh, TK Glenn, A Gogiberidze, G Gonin, M Gosset, J Goto, Y de Cassagnac, RG Grau, N Greene, SV Perdekamp, MG Guryn, W Gustafsson, HA Hachiya, T Haggerty, JS Hamagaki, H Hansen, AG Hartouni, EP Harvey, M Hayano, R Hayashi, N He, X Heffner, M Hemmick, TK Heuser, JM Hibino, M Hill, JC Holzmann, W Homma, K Hong, B Hoover, A Ichihara, T Ikonnikov, VV Imai, K Isenhower, D Ishihara, M Issah, M Isupov, A Jacak, BV Jang, WY Jeong, Y Jia, J Jinnouchi, O Johnson, BM Johnson, SC Joo, KS Jouan, D Kametani, S Kamihara, N Kang, JH Kapoor, SS Katou, K Kelly, S Khachaturov, B Khanzadeev, A Kikuchi, J Kim, DH Kim, DJ Kim, DW Kim, E Kim, GB Kim, HJ Kistenev, E Kiyomichi, A Kiyoyama, K Klein-Boesing, C Kobayashi, H Kochenda, L Kochetkov, V Koehler, D Kohama, T Kopytine, M Kotchetkov, D Kozlov, A Kroon, PJ Kuberg, CH Kurita, K Kuroki, Y Kweon, MJ Kwon, Y Kyle, GS Lacey, R Ladygin, V Lajoie, JG Lebedev, A Leckey, S Lee, DM Lee, S Leitch, MJ Li, XH Lim, H Litvinenko, A Liu, MX Liu, Y Maguire, CF Makdisi, YI Malakhov, A Manko, VI Mao, Y Martinez, G Marx, MD Masui, H Matathias, F Matsumoto, T McGaughey, PL Melnikov, E Messer, F Miake, Y Milan, J Miller, TE Milov, A Mioduszewski, S Mischke, RE Mishra, GC Mitchell, JT Mohanty, AK Morrison, DP Moss, JM Muhlbacher, F Mukhopadhyay, D Muniruzzaman, M Murata, J Nagamiya, S Nagle, JL Nakamura, T Nandi, BK Nara, M Newby, J Nilsson, P Nyanin, AS Nystrand, J O'Brien, E Ogilvie, CA Ohnishi, H Ojha, ID Okada, K Ono, M Onuchin, V Oskarsson, A Otterlund, I Oyama, K Ozawa, K Pal, D Palounek, APT Pantuev, V Papavassiliou, V Park, J Parmar, A Pate, SF Peitzmann, T Peng, JC Peresedov, V Pinkenburg, C Pisani, RP Plasil, F Purschke, ML Purwar, AK Rak, J Ravinovich, I Read, KF Reuter, M Reygers, K Riabov, V Riabov, Y Roche, G Romana, A Rosati, M Rosnet, P Ryu, SS Sadler, ME Saito, N Sakaguchi, T Sakai, M Sakai, S Samsonov, V Sanfratello, L Santo, R Sato, HD Sato, S Sawada, S Schutz, Y Semenov, V Seto, R Shaw, MR Shea, TK Shibata, TA Shigaki, K Shiina, T Silva, CL Silvermyr, D Sim, KS Singh, CP Singh, V Sivertz, M Soldatov, A Soltz, RA Sondheim, WE Sorensen, SP Sourikova, IV Staley, F Stankus, PW Stenlund, E Stepanov, M Ster, A Stoll, SP Sugitate, T Sullivan, JP Takagui, EM Taketani, A Tamai, M Tanaka, KH Tanaka, Y Tanida, K Tannenbaum, MJ Tarjan, P Tepe, JD Thomas, TL Tojo, J Torii, H Towell, RS Tserruya, I Tsuruoka, H Tuli, SK Tydesjo, H Tyurin, N van Hecke, HW Velkovska, J Velkovsky, M Veszpremi, V Villatte, L Vinogradov, AA Volkov, MA Vznuzdaev, E Wang, XR Watanabe, Y White, SN Wohn, FK Woody, CL Xie, W Yang, Y Yanovich, A Yokkaichi, S Young, GR Yushmanov, IE Zajc, WA Zhang, C Zhou, S Zhou, SJ Zolin, L CA PHENIX Collaborat TI Measurement of single electron event anisotropy in Au plus Au collisions at root s(NN)=200 GeV SO PHYSICAL REVIEW C LA English DT Article ID PHENIX; FLOW; AU+AU AB The transverse momentum dependence of the azimuthal anisotropy parameter v(2), the second harmonic of the azimuthal distribution, for electrons at midrapidity (vertical bar eta vertical bar < 0.35) has been measured with the PHENIX detector in Au+Au collisions at root s(NN) = 200 GeV. The measurement was made with respect to the reaction plane defined at high rapidities (vertical bar eta vertical bar = 3.1-3.9). From the result we have measured the v(2) of electrons from heavy flavor decay after subtraction of the v(2) of electrons from other sources such as photon conversions and Dalitz decay from light neutral mesons. We observe a nonzero single electron v(2) with a 90% confidence level in the intermediate-p(T) region. The precision of the present data set does not permit us to conclude definitively that heavy quarks exhibit thermalization with the transverse flow of the bulk matter. C1 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. Brookhaven Natl Lab, Upton, NY 11973 USA. Univ Calif Riverside, Riverside, CA 92521 USA. China Inst Atom Energy, Beijing, Peoples R China. Univ Tokyo, Grad Sch Sci, Ctr Nucl Study, Bunkyo Ku, Tokyo 1130033, Japan. Nevis Labs, New York, NY 10533 USA. Columbia Univ, New York, NY 10027 USA. CEA Saclay, F-91191 Gif Sur Yvette, France. Univ Debrecen, H-4010 Debrecen, 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. Iowa State Univ, Ames, IA 50011 USA. Joint Inst Nucl Res, Dubna 141980, Russia. KAERI, Cyclotron Appl Lab, Seoul, South Korea. Kangnung Natl Univ, Kangnung 210702, South Korea. KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan. Hungarian Acad Sci, KFKI, Res Inst Particle & Nucl Phys, H-1525 Budapest, Hungary. Korea Univ, Seoul 136701, South Korea. Russell Res Ctr, SV Kurashov Med Inst, Moscow, Russia. Kyoto Univ, Kyoto 6068502, Japan. Ecole Polytech, CNRS, Lab Leprince Ringuet, 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, CNRS, IN2P3, LPC, F-63177 Clermont Ferrand, France. Lund Univ, Dept Phys, SE-22100 Lund, Sweden. Univ Munster, Inst Kernphys, D-48149 Munster, Germany. Myongji Univ, Kyonggi Do 449728, South Korea. Nagaski 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. PNPI, Petersburg Nucl Phys Inst, St Petersburg 188300, Russia. RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan. Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA. St Petersburg State Univ, St Petersburg, Russia. 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, CNRS, IN2P3, SUBATECH, 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), Abilene Christian Univ, Abilene, TX 79699 USA. RI seto, richard/G-8467-2011; du Rietz, Rickard/I-3794-2013; 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; Taketani, Atsushi/E-1803-2017; Semenov, Vitaliy/E-9584-2017 OI du Rietz, Rickard/0000-0002-9884-9058; Hayano, Ryugo/0000-0002-1214-7806; Taketani, Atsushi/0000-0002-4776-2315; NR 21 TC 63 Z9 62 U1 6 U2 7 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 AUG PY 2005 VL 72 IS 2 AR 024901 DI 10.1103/PhysRevC.72.0249001 PG 10 WC Physics, Nuclear SC Physics GA 960BH UT WOS:000231564700041 ER PT J AU Ashwood, NI Freer, M Millener, DJ Orr, NA Carstoiu, F Ahmed, S Angelique, JC Bouchat, V Catford, WN Clarke, NM Curtis, N Hanappe, F Horoi, M Kerckx, Y Lecouey, JL Marques, FM Materna, T Normand, G Pain, S Soic, N Timis, C Unshakova, A Ziman, VA AF Ashwood, NI Freer, M Millener, DJ Orr, NA Carstoiu, F Ahmed, S Angelique, JC Bouchat, V Catford, WN Clarke, NM Curtis, N Hanappe, F Horoi, M Kerckx, Y Lecouey, JL Marques, FM Materna, T Normand, G Pain, S Soic, N Timis, C Unshakova, A Ziman, VA TI High-energy two-neutron removal from Be-10 SO PHYSICAL REVIEW C LA English DT Article ID LIGHT-NUCLEI; SCATTERING; STATES; SHELL; DECAY; MODEL; B-9; 9BE AB A kinetically complete measurement of the C-12(Be-10, alpha+alpha+n) and (Be-10, alpha+alpha) reactions has been performed at a beam energy of 30 MeV/nucleon. The charged beam velocity particles were detected in an array of Si-CsI detectors placed at zero degrees, and the neutrons in an 81-element neutron array. The coincident detection of the final-state particles, produced in the breakup of Be-10, allowed the reconstruction of the excitation energy in the Be-8 and Be-9 systems. States in Be-8 were identified, in particular the ground and first-excited states; and in Be-9, states at 1.68, 2.43, and (2.78, 3.05) MeV were observed. The population of these levels, in particular the 2.43 MeV 5/2(-) level, suggests that collective excitations play an important role in the neutron removal process. Distorted wave Born approximation and Glauber-type calculations have been used to model the direct neutron removal from the Be-10 ground state and the two-step removal via inelastic excitations of the Be-10(2(+)) and Be-9(5/2(-)) excited states. C1 Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England. Brookhaven Natl Lab, Upton, NY 11973 USA. ISMRA Univ Caen, Phys Corpusculaire Lab, F-14050 Caen, France. Univ Caen, CNRS, IN2P3, F-14050 Caen, France. IFIN, HH, RO-76900 Bucharest, Romania. Free Univ Brussels, B-1050 Brussels, Belgium. Univ Surrey, Sch Elect & Phys Sci, Guildford GU2 7XH, Surrey, England. Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA. Joint Inst Nucl Res, RU-141980 Dubna, Moscow Region, Russia. RP Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England. RI Pain, Steven/E-1188-2011; Soic, Neven/J-3911-2012; Freer, Martin/F-9379-2013; Unzhakova, Anna/C-4880-2015 OI Pain, Steven/0000-0003-3081-688X; Unzhakova, Anna/0000-0002-7259-7833 NR 36 TC 8 Z9 9 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD AUG PY 2005 VL 72 IS 2 AR 024314 DI 10.1103/PhysRevC.72.024314 PG 8 WC Physics, Nuclear SC Physics GA 960BH UT WOS:000231564700026 ER PT J AU Fischer, SM Anderson, T Kerns, P Mesoloras, G Svelnys, D Lister, CJ Balamuth, DP Hausladen, PA Sarantites, DG AF Fischer, SM Anderson, T Kerns, P Mesoloras, G Svelnys, D Lister, CJ Balamuth, DP Hausladen, PA Sarantites, DG TI Shape coexistence in Br-71 and the question of the ground-state spin of Kr-71 SO PHYSICAL REVIEW C LA English DT Article ID BETA-DECAY; NUCLEUS; FRAGMENTATION; ISOTOPES; SE-70 AB When the N=Z line approaches the proton dripline above Ni-56 an increasing distortion of mirror symmetry is expected as the proton-rich partner becomes marginally bound. Urkedal and Hamamoto have considered Kr-71 and suggest the distortion could lead to a different ground-state spin to its mirror partner Br-71, based on the reinterpretation of a beta-decay measurement. This would be a unique situation in T=1/2 nuclei. We have performed a new in-beam spectroscopic measurement of Br-71, following the Ca-40(Ca-40,2 alpha p) reaction at 160 MeV and using Gammasphere. Many new states have been found, with candidates for eight Nilsson bandheads below 1 MeV. Cross-linking decays tightly constrain most of the angular momentum assignments. The Kr-71 beta-decay data, seen in the light of this new information on Br-71, support the original ground-state assignment of Kr-71 as J(pi)=5/2(-), as would be normally expected for the mirror partner of J(pi)=5/2(-) Br-71. C1 De Paul Univ, Dept Phys, Chicago, IL 60614 USA. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA. Washington Univ, Dept Chem, St Louis, MO 63130 USA. RP Fischer, SM (reprint author), De Paul Univ, Dept Phys, Chicago, IL 60614 USA. NR 38 TC 4 Z9 4 U1 0 U2 1 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 AUG PY 2005 VL 72 IS 2 AR 024321 DI 10.1103/PhysRevC.72.024321 PG 16 WC Physics, Nuclear SC Physics GA 960BH UT WOS:000231564700033 ER PT J AU Juodagalvis, A Dean, DJ AF Juodagalvis, A Dean, DJ TI Gamow-Teller GT(+) distributions in nuclei with mass A=90-97 SO PHYSICAL REVIEW C LA English DT Article ID MODEL MONTE-CARLO; WEAK INTERACTION RATES; FP-SHELL NUCLEI; RANGE A=45-65; DECAY AB We investigate the Gamow-Teller strength distributions in the electron-capture direction in nuclei having mass A=90-97, assuming a Sr-88 core and using a realistic interaction that reasonably reproduces nuclear spectroscopy for a wide range of nuclei in the region as well as experimental data on Gamow-Teller strength distributions. We discuss the systematics of the distributions and their centroids. We also predict the strength distributions for several nuclei involving stable isotopes that should be experimentally accessible for one-particle exchange reactions in the near future. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. RP Juodagalvis, A (reprint author), Oak Ridge Natl Lab, Div Phys, POB 2008, Oak Ridge, TN 37831 USA. OI Dean, David/0000-0002-5688-703X NR 32 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 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD AUG PY 2005 VL 72 IS 2 AR 024306 DI 10.1103/PhysRevC.72.024306 PG 10 WC Physics, Nuclear SC Physics GA 960BH UT WOS:000231564700018 ER PT J AU Kahana, DE Kahana, SH AF Kahana, DE Kahana, SH TI Cronin effect and high-p(perpendicular to) suppression in d+Au collisions SO PHYSICAL REVIEW C LA English DT Article ID ULTRARELATIVISTIC NUCLEAR COLLISIONS; LARGE TRANSVERSE-MOMENTUM; HEAVY-ION COLLISIONS; DUAL PARTON MODEL; PARTICLE-PRODUCTION; SEMIHARD PROCESSES; HADRON-COLLISIONS; SMALL-X; QCD; THERMALIZATION AB Great interest has attached to recent d+Au, root s = 200A GeV data at RHIC, obtained with the BRAHMS detector. Between pseudorapidities eta = 0 and eta = 3.2 the appropriately defined ratio R[dAu/pp], comparing transverse-momentum spectra of d+Au to pp, exhibits a steady decrease with.. This diminution is examined within a two-stage simulation. In the first stage, initial nucleon-nucleon interactions are treated in parallel, as if occurring simultaneously, whereas the second stage is a considerably reduced energy hadronic cascade. This approach is by no means a standard hadronic cascade, never entailing an overly high density of cascading particles. Indeed a condition is imposed on the total multiplicity at the outset of the second stage permitting no overlap of intermediate interacting prehadrons. The result is an adequate description of the data, including the so-called Cronin effect. Additionally there is, in the second stage, clear evidence for suppression of relatively high transverse momentum eta = 0 leading mesons (i.e., the Cronin effect is appreciably muted by final state interactions). C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP 31 Pembrook Dr, Stony Brook, NY 11790 USA. OI Kahana, David Ewan/0000-0003-1266-9089 NR 70 TC 6 Z9 6 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 AUG PY 2005 VL 72 IS 2 AR 024903 DI 10.1103/PhysRevC.72.024903 PG 7 WC Physics, Nuclear SC Physics GA 960BH UT WOS:000231564700043 ER PT J AU Kohama, A Iida, K Oyamatsu, K AF Kohama, A Iida, K Oyamatsu, K TI Reaction cross section described by a black sphere approximation of nuclei SO PHYSICAL REVIEW C LA English DT Article ID PROTON ELASTIC-SCATTERING; INTERMEDIATE ENERGY-RANGE; INELASTIC-SCATTERING; POLARIZED PROTONS; DENSITY-DISTRIBUTION; 1-GEV PROTONS; 0.8-GEV; PB-208; CA-40; C-12 AB We identify a length scale that simultaneously accounts for the observed proton-nucleus reaction cross section and diffraction peak in the proton elastic differential cross section. This scale is the nuclear radius, a, deduced from proton elastic scattering data of incident energies higher than similar to 800 MeV by assuming that the target nucleus is a "black" sphere. The values of a are determined so as to reproduce the angle of the first diffraction maximum in the scattering data for stable nuclei. We find that the absorption cross section, pi a(2), agrees with the empirical total reaction cross section for C, Sn, and Pb to within error bars. This agreement persists in the case of the interaction cross section measured for a carbon target. We also find that root 3/5a systematically deviates from the empirically deduced values of the root-mean-square matter radius for nuclei having masses less than about 50, while it almost completely agrees with the deduced values for A greater than or similar to 50. This tendency suggests a significant change of the nuclear matter distribution from a rectangular one for A less than or similar to 50, which is consistent with the behavior of the empirical charge distribution. C1 RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan. Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA. Aichi Shukutoku Univ, Dept Med Theories & Prod, Aichi 4801197, Japan. Nagoya Univ, Dept Phys, Chigusa Ku, Nagoya, Aichi 4648602, Japan. RP RIKEN, Inst Phys & Chem Res, 2-1 Hirosawa, Wako, Saitama 3510198, Japan. NR 57 TC 17 Z9 17 U1 1 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD AUG PY 2005 VL 72 IS 2 AR 024602 DI 10.1103/PhysRevC.72.024602 PG 5 WC Physics, Nuclear SC Physics GA 960BH UT WOS:000231564700035 ER PT J AU Krassnigg, A AF Krassnigg, A TI Axial-vector mesons in a relativistic point-form approach SO PHYSICAL REVIEW C LA English DT Article ID CONSTITUENT-QUARK-MODEL; HADRONIC DECAYS; BARYON RESONANCES; CHROMODYNAMICS; LIGHT AB The Poincare invariant coupled-channel formalism for two-particle systems interacting via one-particle exchange, which has been developed and applied to vector mesons, is now applied to axial vector mesons. We thereby extend the previous study of a dynamical treatment of the Goldstone-boson exchange by comparison with the commonly used instantaneous approximation to the case of orbital angular momentum l=1. Effects in the mass shifts show more variations than for the vector-meson case. Results for the decay widths are sizable, but comparison with sparse experimental data is inconclusive. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. NR 28 TC 6 Z9 6 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 AUG PY 2005 VL 72 IS 2 AR 028201 DI 10.1103/PhysRevC.72.028201 PG 4 WC Physics, Nuclear SC Physics GA 960BH UT WOS:000231564700073 ER PT J AU Laget, JM AF Laget, JM TI Three-body mechanisms in the He-3(e,e(')p) reactions at high missing momentum SO PHYSICAL REVIEW C LA English DT Article ID FEW-BODY SYSTEMS; PION-PHOTOPRODUCTION; ABSORPTION; HE-3; REGION AB A particular three-body mechanism is responsible for the missing strength that has been reported in He-3(e,e(')p) reactions at missing momentum above 700 MeV/c. It corresponds to the absorption of the virtual photon by a nucleon at rest which subsequently propagates on shell and emits a meson which is reabsorbed by the pair formed by the two other nucleons. Its amplitude, which is negligible in photon-induced reactions as well as in the electroproduction of an on-shell meson, becomes maximal in the quasifree kinematics (X=1). This mechanism relates the amplitude of the He-3(e,e(')p)H-2 reaction to the amplitude of pd elastic scattering at backward angles. C1 CEA Saclay, Serv Phys Nucl, F-91191 Gif Sur Yvette, France. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Laget, JM (reprint author), CEA Saclay, Serv Phys Nucl, F-91191 Gif Sur Yvette, France. NR 21 TC 7 Z9 7 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 AUG PY 2005 VL 72 IS 2 AR 024001 DI 10.1103/PhysRevC.72.024001 PG 4 WC Physics, Nuclear SC Physics GA 960BH UT WOS:000231564700006 ER PT J AU Laget, JM AF Laget, JM TI The Primakoff effect on a proton target SO PHYSICAL REVIEW C LA English DT Article ID NEUTRAL PI-MESONS; SINGLE PHOTOPRODUCTION; HIGH-ENERGIES; HYDROGEN; DIRECTION; ANGLES; WIDTH AB The Primakoff effect offers us a way to determine the radiative decay width of pseudoscalar mesons when they are photoproduced in the electromagnetic field of hadronic systems. Taking advantage of recent developments in the Regge description of the production of mesons in the strong hadronic field, this paper evaluates the relative importance of the electromagnetic and the strong amplitudes and assesses the possibilities that have become opened because of modern experimental facilities. C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Laget, JM (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. EM laget@jlab.org NR 16 TC 15 Z9 15 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 AUG PY 2005 VL 72 IS 2 AR 022202 DI 10.1103/PhysRevC.72.022202 PG 4 WC Physics, Nuclear SC Physics GA 960BH UT WOS:000231564700004 ER PT J AU Lee, D Schafer, T AF Lee, D Schafer, T TI Neutron matter on the lattice with pionless effective field theory SO PHYSICAL REVIEW C LA English DT Article ID NUCLEAR-MATTER; SYSTEMS; HOT AB We study neutron matter by combining pionless effective field theory with nonperturbative lattice methods. The neutron contact interaction is determined by zero-temperature scattering data. We simulate neutron matter on the lattice at temperatures of 4 and 8 MeV and densities below one-fifth normal nuclear matter density. Our results at different lattice spacings agree with one another and match bubble-chain calculations at low densities. The equation of state of pure neutron matter obtained from our simulations agrees quantitatively with variational calculations based on realistic potentials. C1 N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA. Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA. RP N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA. NR 30 TC 39 Z9 39 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 AUG PY 2005 VL 72 IS 2 AR 024006 DI 10.1103/PhysRevC.72.024006 PG 12 WC Physics, Nuclear SC Physics GA 960BH UT WOS:000231564700011 ER PT J AU Lemaire, S Talou, P Kawano, T Chadwick, MB Madland, DG AF Lemaire, S Talou, P Kawano, T Chadwick, MB Madland, DG TI Monte Carlo approach to sequential neutron emission from fission fragments SO PHYSICAL REVIEW C LA English DT Article ID U-235; MULTIPLICITIES; SPECTRUM; FORMULA; ENERGY AB We have implemented a Monte Carlo simulation of fission fragment statistical decay by sequential neutron emission. Within this approach, we calculate the center-of-mass and laboratory prompt neutron energy spectra as a function of the mass of fission fragments and integrated over the whole mass distribution. We also assess the prompt neutron multiplicity distribution P(.), both the average number of emitted neutrons and the average neutron energy as a function of the mass of the fission fragments [respectively (nu) over bar (A) and < e >(A)]. We investigate the average total energy available for prompt gamma-ray emission as a function of the mass of the fission fragments (E) over bar (gamma) ( A). We also calculate neutron- neutron correlations such as the full matrix O.( A, TKE) as well as correlations between neutron energies. Two assumptions for partitioning the total available excitation energy among the light and heavy fragments are considered. Results are reported for the neutron-induced fission of U-235 ( at neutron energy of 0.53 MeV) and for the spontaneous fission of Cf-252. C1 Los Alamos Natl Lab, Theoret Div Nucl Phys Grp, Los Alamos, NM 87545 USA. RP Lemaire, S (reprint author), Los Alamos Natl Lab, Theoret Div Nucl Phys Grp, POB 1663, Los Alamos, NM 87545 USA. NR 26 TC 83 Z9 83 U1 0 U2 2 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 AUG PY 2005 VL 72 IS 2 AR 024601 DI 10.1103/PhysRevC.72.024601 PG 12 WC Physics, Nuclear SC Physics GA 960BH UT WOS:000231564700034 ER PT J AU Matsui, K Sato, T Lee, TSH AF Matsui, K Sato, T Lee, TSH TI Quark-hadron duality and parity violating asymmetry of electroweak reactions in the Delta region SO PHYSICAL REVIEW C LA English DT Article ID NUCLEON SCATTERING; RESONANCE REGION; LOCAL DUALITY; FORM-FACTORS; HIGHER TWIST; LOW ENERGIES; SUM-RULES; ELECTROPRODUCTION; MODEL; EXCITATION AB A dynamical model [T. Sato and T.-S. H. Lee, Phys. Rev. C 54, 2660 (1996); 63, 055201 (2001); T. Sato, D. Uno, and T.-S. H. Lee, ibid. 67, 065201 (2003)] of electroweak pion production reactions in the Delta(1232) region has been extended to include the neutral current contributions for examining the local quark-hadron duality in neutrino-induced reactions and for investigating how the axial N-Delta form factor can be determined by the parity violating asymmetry of N(e(->),e(')) reactions. We first show that the recent data of (e,e(')) structure functions F-1 and F-2, which exhibit the quark-hadron duality, are in good agreement with our predictions. For possible future experimental tests, we then predict that the structure functions F-1,F-2, and F-3 for (nu,e) and (nu,nu(')) processes also show the similar quark-hadron duality. The spin-dependent structure functions g(1) and g(2) of (e,e(')) have also been calculated from our model. It is found that the local quark-hadron duality is not seen in the calculated g(1) and g(2), while our results for g(1) and some polarization observables associated with the exclusive p((e) over right arrow ,e(')pi) and (p) over right arrow((e) over right arrow ,e(')pi) reactions are in reasonably good agreement with the recent data. In the study of parity violating asymmetry A of N((e) over right arrow ,e(')) reactions, the relative importance between the nonresonant mechanisms and the Delta excitation is investigated by taking into account the unitarity condition. Predictions are made for using the data of A to test the axial N-Delta form factors determined previously in the studies of N(nu(mu),mu(-)pi) reactions. The predicted asymmetry A are also compared with the parton model predictions for future experimental investigations of quark-hadron duality. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Osaka Univ, Dept Phys, Osaka 5600043, Japan. RP Matsui, K (reprint author), Osaka Univ, Dept Phys, Osaka 5600043, Japan. NR 66 TC 27 Z9 28 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 AUG PY 2005 VL 72 IS 2 AR 025204 DI 10.1103/PhysRevC.72.025204 PG 14 WC Physics, Nuclear SC Physics GA 960BH UT WOS:000231564700053 ER PT J AU Prakhov, S Nefkens, BMK Allgower, CE Bekrenev, V Briscoe, WJ Clajus, M Comfort, JR Craig, K Grosnick, D Huber, GM Isenhower, D Knecht, N Koetke, D Koulbardis, A Kozlenko, N Kruglov, S Lolos, G Lopatin, I Manley, DM Manweiler, R Marusic, A McDonald, S Olmsted, J Papandreou, Z Peaslee, D Phaisangittisakul, N Price, JW Ramirez, AF Sadler, M Shafi, A Spinka, H Stanislaus, TDS Starostin, A Staudenmaier, HM Supek, I Tippens, WB AF Prakhov, S Nefkens, BMK Allgower, CE Bekrenev, V Briscoe, WJ Clajus, M Comfort, JR Craig, K Grosnick, D Huber, GM Isenhower, D Knecht, N Koetke, D Koulbardis, A Kozlenko, N Kruglov, S Lolos, G Lopatin, I Manley, DM Manweiler, R Marusic, A McDonald, S Olmsted, J Papandreou, Z Peaslee, D Phaisangittisakul, N Price, JW Ramirez, AF Sadler, M Shafi, A Spinka, H Stanislaus, TDS Starostin, A Staudenmaier, HM Supek, I Tippens, WB CA Crystal Ball Collaboration TI Measurement of the branching ratio for eta ->pi(0)gamma gamma decay SO PHYSICAL REVIEW C LA English DT Article ID CHIRAL PERTURBATION-THEORY; ETA-MESON; SLOPE PARAMETER; MODEL AB The branching ratio (BR) for the rare decay eta ->pi(0)gamma gamma was measured with the Crystal Ball multiphoton spectrometer. The result, BR(eta ->pi(0)gamma gamma)=(3.5 +/- 0.7(stat)+/- 0.6(syst))x10(-4), is in agreement with calculations of chiral perturbation theory to third order. We have used a sample of 28 million eta mesons produced at the BNL Alternating Gradient Synchrotron using the pi(-)p ->eta n reaction close to threshold. We detail the intricate extraction of the signal, which has about 1.6 thousand eta ->pi(0)gamma gamma events, from the overwhelming background of eta -> 3 pi(0) decays and from the pi(-)p ->pi(0)pi(0)n reaction. C1 Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Petersburg Nucl Phys Inst, RU-188350 Gatchina, Russia. George Washington Univ, Washington, DC 20052 USA. Arizona State Univ, Tempe, AZ 85287 USA. Valparaiso Univ, Valparaiso, IN 46383 USA. Abilene Christian Univ, Abilene, TX 79699 USA. Univ Regina, Regina, SK S4S 0A2, Canada. Kent State Univ, Kent, OH 44242 USA. Univ Maryland, College Pk, MD 20742 USA. Univ Karlsruhe, D-76128 Karlsruhe, Germany. Rudjer Boskovic Inst, Zagreb 10002, Croatia. RP Univ Calif Los Angeles, Los Angeles, CA 90095 USA. RI Marusic, Ana/E-7683-2013 OI Marusic, Ana/0000-0001-6272-0917 NR 26 TC 19 Z9 19 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 AUG PY 2005 VL 72 IS 2 AR 025201 DI 10.1103/PhysRevC.72.025201 PG 18 WC Physics, Nuclear SC Physics GA 960BH UT WOS:000231564700050 ER PT J AU Shergur, J Wohr, A Walters, WB Kratz, KL Arndt, O Brown, BA Cederkall, J Dillmann, I Fraile, LM Hoff, P Joinet, A Koster, U Pfeiffer, B AF Shergur, J Wohr, A Walters, WB Kratz, KL Arndt, O Brown, BA Cederkall, J Dillmann, I Fraile, LM Hoff, P Joinet, A Koster, U Pfeiffer, B TI Identification of shell-model states in Sb-135 populated via beta(-) decay of Sn-135 SO PHYSICAL REVIEW C LA English DT Article ID NUCLEI AB The beta decay of Sn-135 was studied at CERN/ISOLDE using a resonance ionization laser ion source and mass separator to achieve elemental and mass selectivity, respectively. gamma-ray singles and gamma-gamma coincidence spectra were collected as a function of time with the laser on and with the laser off. These data were used to establish the positions of new levels in Sb-135, including new low-spin states at 440 and 798 keV, which are given tentative spin and parity assignments of 3/2(+) and 9/2(+), respectively. The observed levels of Sb-135 are compared with shell-model calculations using different single-particle energies and different interactions. C1 Univ Maryland, Dept Chem, College Pk, MD 20742 USA. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. Johannes Gutenberg Univ Mainz, Inst Kernchem, D-55128 Mainz, Germany. Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA. CERN, ISOLDE, PH Dept, CH-1211 Geneva, Switzerland. Univ Complutense, Dept Fist Atom Mol & Nucl, E-28030 Madrid, Spain. Univ Oslo, Dept Chem, NO-1163 Oslo, Norway. RP Shergur, J (reprint author), Univ Maryland, Dept Chem, College Pk, MD 20742 USA. RI Fraile, Luis/B-8668-2011 OI Fraile, Luis/0000-0002-6281-3635 NR 22 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 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD AUG PY 2005 VL 72 IS 2 AR 024305 DI 10.1103/PhysRevC.72.024305 PG 9 WC Physics, Nuclear SC Physics GA 960BH UT WOS:000231564700017 ER PT J AU Simons, AJ Wadsworth, R Jenkins, DG Clark, RM Cromaz, M Deleplanque, MA Diamond, RM Fallon, P Lane, GJ Lee, IY Macchiavelli, AO Stephens, FS Svensson, CE Vetter, K Ward, D Frauendorf, S Gu, Y AF Simons, AJ Wadsworth, R Jenkins, DG Clark, RM Cromaz, M Deleplanque, MA Diamond, RM Fallon, P Lane, GJ Lee, IY Macchiavelli, AO Stephens, FS Svensson, CE Vetter, K Ward, D Frauendorf, S Gu, Y TI Investigation of antimagnetic rotation in light Cadmium nuclei: Cd-106,Cd-108 SO PHYSICAL REVIEW C LA English DT Article ID SHEARS MECHANISM; A-SIMILAR-TO-110 REGION; COLLECTIVITY; CD-108; PROTON; BANDS AB The lifetimes of excited states belonging to the lowest lying positive-parity bands in Cd-106,Cd-108 have been measured using the Doppler-shift attenuation method. The resulting B(E2) transition rates show a significant decrease with increasing spin in Cd-106, whereas in Cd-108 there is tentative evidence for a similar effect. The results are compared with cranking and semiclassical model calculations, which indicate that the structures have the properties expected from an "antimagnetic" rotational band resulting from the coupling of g(9/2) proton holes to aligned pairs of h(11/2) and g(7/2) neutron particles. C1 Univ York, Dept Phys, York Y010 5DD, N Yorkshire, England. Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. FZ Rossendorf, D-01314 Dresden, Germany. RP Simons, AJ (reprint author), Univ York, Dept Phys, York Y010 5DD, N Yorkshire, England. RI Gu, Yingqiong/A-8228-2010; Lane, Gregory/A-7570-2011; gu, yingqiong/J-8394-2012 OI Lane, Gregory/0000-0003-2244-182X; NR 23 TC 26 Z9 28 U1 0 U2 2 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 AUG PY 2005 VL 72 IS 2 AR 024318 DI 10.1103/PhysRevC.72.024318 PG 7 WC Physics, Nuclear SC Physics GA 960BH UT WOS:000231564700030 ER PT J AU Urban, W Rzaaca-Urban, T Pinston, JA Durell, JL Phillips, WR Smith, AG Varley, BJ Ahmad, I Schulz, N AF Urban, W Rzaaca-Urban, T Pinston, JA Durell, JL Phillips, WR Smith, AG Varley, BJ Ahmad, I Schulz, N TI Near-yrast, medium-spin structure of the Mo-107 nucleus SO PHYSICAL REVIEW C LA English DT Article ID FISSION FRAGMENTS; ROTATIONAL BANDS; GROUND-STATES; ISOTOPES; DEFORMATION; SR; IDENTIFICATION; REGION; ZR AB Excited states in Mo-107, populated in spontaneous fission of Cm-248, were studied by use of the EUROGAM2 multidetector array. Spins and parities of the ground state and the 66.0-, 152.1-, and 458.5-keV excited levels, reported previously, were changed based on conversion-coefficient and angular-correlation measurements. Octupole deformation reported previously in Mo-107 is dismissed, and we explain the near-yrast structure of Mo-107 in terms of rotational bands built on the 5/2(+)[413], 3/2(+)[411], and 7/2(-)[523] orbitals. C1 Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland. Univ Grenoble 1, Lab Phys Subatom & Cosmol, IN2P3, CNRS, F-38026 Grenoble, France. Univ Manchester, Dept Phys & Astron, Manchester M13 9PL, Lancs, England. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Strasbourg 1, F-67037 Strasbourg, France. CNRS, Inst Rech Subatom, UMR 7500, IN2P3, F-67037 Strasbourg, France. RP Urban, W (reprint author), Univ Warsaw, Fac Phys, Ul Hoza 69, PL-00681 Warsaw, Poland. NR 23 TC 22 Z9 23 U1 0 U2 1 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 AUG PY 2005 VL 72 IS 2 AR 027302 DI 10.1103/PhysRevC.72.027302 PG 4 WC Physics, Nuclear SC Physics GA 960BH UT WOS:000231564700069 ER PT J AU Acosta, D Adelman, J Affolder, T Akimoto, T Albrow, MG Ambrose, D Amerio, S Amidei, D Anastassov, A Anikeev, K Annovi, A Antos, J Aoki, M Apollinari, G Arisawa, T Arguin, JF Artikov, A Ashmanskas, W Attal, A Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Badgett, W Barbaro-Galtieri, A Barker, GJ Barnes, VE Barnett, BA Baroiant, S Bauer, G Bedeschi, F Behari, S Belforte, S Bellettini, G Bellinger, J Belloni, A Ben-Haim, E Benjamin, D Beretvas, A Berry, T Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Bocci, A Bodek, A Bolla, G Bolshov, A Bortoletto, D Boudreau, J Bourov, S Brau, B Bromberg, C Brubaker, E Budagov, J Budd, HS Burkett, K Busetto, G Bussey, P Byrum, KL Cabrera, S Campanelli, M Campbell, M Canelli, F Canepa, A Casarsa, M Carlsmith, D Carosi, R Carron, S Cavalli-Sforza, M Castro, A Catastini, P Cauz, D Cerri, A Cerrito, L Chapman, J Chen, YC Chertok, M Chiarelli, G Chlachidze, G Chlebana, F Cho, I Cho, K Chokheli, D Chou, JP Chuang, S Chung, K Chung, WH Chung, YS Cijliak, M Ciobanu, CI Ciocci, MA Clark, AG Clark, D Coca, M Connolly, A Convery, M Conway, J Cooper, B Copic, K Cordelli, M Cortiana, G Cranshaw, J Cuevas, J Cruz, A Culbertson, R Currat, C Cyr, D Dagenhart, D Da Ronco, S D'Auria, S de Barbaro, P De Cecco, S Deisher, A De Lentdecker, G Dell'Orso, M Demers, S Demortier, L Deninno, M De Pedis, D Derwent, PF Dionisi, C Dittmann, JR DiTuro, P Dorr, C Dominguez, A Donati, S Donega, M Donini, J D'Onofrio, M Dorigo, T Ebina, K Efron, J Ehlers, J Erbacher, R Erdmann, M Errede, D Errede, S Eusebi, R Fang, HC Farrington, S Fedorko, I Fedorko, WT Feild, RG Feindt, M Fernandez, JP Field, RD Flanagan, G Flores-Castillo, LR Foland, A Forrester, S Foster, GW Franklin, M Freeman, JC Fujii, Y Furic, I Gajjar, A Gallinaro, M Galyardt, J Garcia-Sciveres, M Garfinkel, AF Gay, C Gerberich, H Gerdes, DW Gerchtein, E Giagu, S Giannetti, P Gibson, A Gibson, K Ginsburg, C Giolo, K Giordani, M Giunta, M Giurgiu, G Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, D Goldstein, J Gomez, G Gomez-Ceballos, G Goncharov, M Gonzalez, O Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Gresele, A Griffiths, M Grosso-Pilcher, C Grundler, U Guimaraes da Costa, J Haber, C Hahn, K Hahn, SR Halkiadakis, E Hamilton, A Han, BY Handler, R Happacher, F Hara, K Hare, M Harr, RF Harris, RM Hartmann, F Hatakeyama, K Hauser, J Hays, C Hayward, H Heinemann, B Heinrich, J Hennecke, M Herndon, M Hill, C Hirschbuehl, D Hocker, A Hoffman, KD Holloway, A Hou, S Houlden, MA Huffman, BT Huang, Y Hughes, RE Huston, J Ikado, K Incandela, J Introzzi, G Iori, M Ishizawa, Y Issever, C Ivanov, A Iwata, Y Iyutin, B James, E Jang, D Jayatilaka, B Jeans, D Jensen, H Jeon, EJ Jones, M Joo, KK Jun, SY Junk, T Kamon, T Kang, J Karagoz Unel, M Karchin, PE Kato, Y Kemp, Y Kephart, R Kerzel, U Khotilovich, V Kilminster, B Kim, DH Kim, HS Kim, JE Kim, MJ Kim, MS Kim, SB Kim, SH Kim, YK Kirby, M Kirsch, L Klimenko, S Klute, M Knuteson, B Ko, BR Kobayashi, H Kong, DJ Kondo, K Konigsberg, J Kordas, K Korn, A Korytov, A Kotwal, AV Kovalev, A Kraus, J Kravchenko, I Kreymer, A Kroll, J Kruse, M Krutelyov, V Kuhlmann, SE Kwang, S Laasanen, AT Lai, S Lami, S Lammel, S Lancaster, M Lander, R Lannon, K Lath, A Latino, G Lazzizzera, I Lecci, C LeCompte, T Lee, J Lee, J Lee, SW Lefevre, R Leonardo, N Leone, S Levy, S Lewis, JD Li, K Lin, C Lin, CS Lindgren, M Lipeles, E Liss, TM Lister, A Litvintsev, DO Liu, T Liu, Y Lockyer, NS Loginov, A Loreti, M Loverre, P Lu, RS Lucchesi, D Lujan, P Lukens, P Lungu, G Lyons, L Lys, J Lysak, R Lytken, E MacQueen, D Madrak, R Maeshima, K Maksimovic, P Manca, G Margaroli Marginean, R Marino, C Martin, A Martin, M Martin, V Martinez, M Maruyama, T Matsunaga, H Mattson, M Mazzanti, P McFarland, KS McGivern, D McIntyre, PM McNamara, P McNulty Mehta, A Menzemer, S Menzione, A Merkel, P Mesropian, C Messina, A Miao, T Miladinovic, N Miles, J Miller, L Miller, R Miller, JS Mills, C Miquel, R Miscetti, S Mitselmakher, G Miyamoto, A Moggi, N Mohr, B Moore, R Morello, M Fernandez, PAM Muelmenstaedt, J Mukherjee, A Mulhearn, M Muller, T Mumford, R Munar, A Murat, P Nachtman, J Nahn, S Nakano, I Napier, A Napora, R Naumov, D Necula, V Nelson, T Neu, C Neubauer, MS Nielsen, J Nigmanov, T Nodulman, L Norniella, O Ogawa, T Oh, SH Oh, YD Ohsugi, T Okusawa, T Oldeman, R Orava, R Orejudos, W Osterberg, K Pagliarone, C Palencia, E Paoletti, R Papadimitriou, V Paramonov, AA Pashapour, S Patrick, J Pauletta, G Paulini, M Paus, C Pellett, D Penzo, A Phillips, TJ Piacentino, G Piedra, J Pitts, KT Plager, C Pondrom, L Pope, G Portell, X Poukhov, O Pounder, N Prakoshyn, F Pronko, A Proudfoot, J Ptohos, F Punzi, G Rademacker, J Rahaman, MA Rakitine, A Rappoccio, S Ratnikov, F Ray, H Reisert, B Rekovic, V Renton, P Rescigno, M Rimondi, F Rinnert, K Ristori, L Robertson, WJ Robson, A Rodrigo, T Rolli, S Roser, R Rossin, R Rott, C Russ, J Rusu, V Ruiz, A Ryan, D Saarikko, H Sabik, S Safonov, A St Denis, R Sakumoto, WK Salamanna, G Saltzberg, D Sanchez, C Santi, L Sarkar, S Sato, K Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Schwarz, T Scodellaro, L Scott, AL Scribano, A Scuri, F Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Sexton-Kennedy, L Sfiligoi, I Shapiro, MD Shears, T Shepard, PF Sherman, D Shimojima, M Shochet, M Shon, Y Shreyber, I Sidoti, A Sill, A Sinervo, P Sisakyan, A Sjolin, J Skiba, A Slaughter, AJ Sliwa, K Smirnov, D Smith, JR Snider, FD Snihur, R Soderberg, M Soha, A Somalwar, SV Spalding, J Spezziga, M Spinella, F Squillacioti, P Stadie, H Stanitzki, M Stelzer, B Stelzer-Chilton, O Stentz, D Strologas, J Stuart, D Suh, JS Sukhanov, A Sumorok, K Sun, H Suzuki, T Taffard, A Tafirout, R Takano, H Takashima, R Takeuchi, Y Takikawa, K Tanaka, M Tanaka, R Tanimoto, N Tecchio, M Teng, PK Terashi, K Tesarek, RJ Tether, S Thom, J Thompson, AS Thomson, E Tipton, P Tiwari, V Tkaczyk, S Toback, D Tollefson, K Tomura, T Tonelli, D Tonnesmann, M Torre, S Torretta, D Tourneur, S Trischuk, W Tsuchiya, R Tsuno, S Tsybychev, D Turini, N Ukegawa, F Unverhau, T Uozumi, S Usynin, D Vacavant, L Vaiciulis, A Varganov, A Vejcik, S Velev, G Veszpremi, V Veramendi, G Vickey, T Vidal, R Vila, I Vilar, R Vollrath, I Volobouev, I von der Mey, M Wagner, P Wagner, RG Wagner, RL Wagner, W Wallny, R Walter, T Wan, Z Wang, MJ Wang, SM Warburton, A Ward, B Waschke, S Waters, D Watts, T Weber, M Wester, WC Whitehouse, B Whiteson, D Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Wittich, P Wolbers, S Wolfe, C Wolter, M Worcester, M Worm, S Wright, T Wu, X Wurthwein, F Wyatt, A Yagil, A Yamashita, T Yamamoto, K Yamaoka, J Yang, C Yang, UK Yao, W Yeh, GP Yoh, J Yorita, K Yoshida, T Yu, I Yu, S Yun, JC Zanello, L Zanetti, A Zaw, I Zetti, F Zhou, J Zucchelli, S AF Acosta, D Adelman, J Affolder, T Akimoto, T Albrow, MG Ambrose, D Amerio, S Amidei, D Anastassov, A Anikeev, K Annovi, A Antos, J Aoki, M Apollinari, G Arisawa, T Arguin, JF Artikov, A Ashmanskas, W Attal, A Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Badgett, W Barbaro-Galtieri, A Barker, GJ Barnes, VE Barnett, BA Baroiant, S Bauer, G Bedeschi, F Behari, S Belforte, S Bellettini, G Bellinger, J Belloni, A Ben-Haim, E Benjamin, D Beretvas, A Berry, T Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Bocci, A Bodek, A Bolla, G Bolshov, A Bortoletto, D Boudreau, J Bourov, S Brau, B Bromberg, C Brubaker, E Budagov, J Budd, HS Burkett, K Busetto, G Bussey, P Byrum, KL Cabrera, S Campanelli, M Campbell, M Canelli, F Canepa, A Casarsa, M Carlsmith, D Carosi, R Carron, S Cavalli-Sforza, M Castro, A Catastini, P Cauz, D Cerri, A Cerrito, L Chapman, J Chen, YC Chertok, M Chiarelli, G Chlachidze, G Chlebana, F Cho, I Cho, K Chokheli, D Chou, JP Chuang, S Chung, K Chung, WH Chung, YS Cijliak, M Ciobanu, CI Ciocci, MA Clark, AG Clark, D Coca, M Connolly, A Convery, M Conway, J Cooper, B Copic, K Cordelli, M Cortiana, G Cranshaw, J Cuevas, J Cruz, A Culbertson, R Currat, C Cyr, D Dagenhart, D Da Ronco, S D'Auria, S de Barbaro, P De Cecco, S Deisher, A De Lentdecker, G Dell'Orso, M Demers, S Demortier, L Deninno, M De Pedis, D Derwent, PF Dionisi, C Dittmann, JR DiTuro, P Dorr, C Dominguez, A Donati, S Donega, M Donini, J D'Onofrio, M Dorigo, T Ebina, K Efron, J Ehlers, J Erbacher, R Erdmann, M Errede, D Errede, S Eusebi, R Fang, HC Farrington, S Fedorko, I Fedorko, WT Feild, RG Feindt, M Fernandez, JP Field, RD Flanagan, G Flores-Castillo, LR Foland, A Forrester, S Foster, GW Franklin, M Freeman, JC Fujii, Y Furic, I Gajjar, A Gallinaro, M Galyardt, J Garcia-Sciveres, M Garfinkel, AF Gay, C Gerberich, H Gerdes, DW Gerchtein, E Giagu, S Giannetti, P Gibson, A Gibson, K Ginsburg, C Giolo, K Giordani, M Giunta, M Giurgiu, G Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, D Goldstein, J Gomez, G Gomez-Ceballos, G Goncharov, M Gonzalez, O Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Gresele, A Griffiths, M Grosso-Pilcher, C Grundler, U Guimaraes da Costa, J Haber, C Hahn, K Hahn, SR Halkiadakis, E Hamilton, A Han, BY Handler, R Happacher, F Hara, K Hare, M Harr, RF Harris, RM Hartmann, F Hatakeyama, K Hauser, J Hays, C Hayward, H Heinemann, B Heinrich, J Hennecke, M Herndon, M Hill, C Hirschbuehl, D Hocker, A Hoffman, KD Holloway, A Hou, S Houlden, MA Huffman, BT Huang, Y Hughes, RE Huston, J Ikado, K Incandela, J Introzzi, G Iori, M Ishizawa, Y Issever, C Ivanov, A Iwata, Y Iyutin, B James, E Jang, D Jayatilaka, B Jeans, D Jensen, H Jeon, EJ Jones, M Joo, KK Jun, SY Junk, T Kamon, T Kang, J Karagoz Unel, M Karchin, PE Kato, Y Kemp, Y Kephart, R Kerzel, U Khotilovich, V Kilminster, B Kim, DH Kim, HS Kim, JE Kim, MJ Kim, MS Kim, SB Kim, SH Kim, YK Kirby, M Kirsch, L Klimenko, S Klute, M Knuteson, B Ko, BR Kobayashi, H Kong, DJ Kondo, K Konigsberg, J Kordas, K Korn, A Korytov, A Kotwal, AV Kovalev, A Kraus, J Kravchenko, I Kreymer, A Kroll, J Kruse, M Krutelyov, V Kuhlmann, SE Kwang, S Laasanen, AT Lai, S Lami, S Lammel, S Lancaster, M Lander, R Lannon, K Lath, A Latino, G Lazzizzera, I Lecci, C LeCompte, T Lee, J Lee, J Lee, SW Lefevre, R Leonardo, N Leone, S Levy, S Lewis, JD Li, K Lin, C Lin, CS Lindgren, M Lipeles, E Liss, TM Lister, A Litvintsev, DO Liu, T Liu, Y Lockyer, NS Loginov, A Loreti, M Loverre, P Lu, RS Lucchesi, D Lujan, P Lukens, P Lungu, G Lyons, L Lys, J Lysak, R Lytken, E MacQueen, D Madrak, R Maeshima, K Maksimovic, P Manca, G Margaroli Marginean, R Marino, C Martin, A Martin, M Martin, V Martinez, M Maruyama, T Matsunaga, H Mattson, M Mazzanti, P McFarland, KS McGivern, D McIntyre, PM McNamara, P McNulty Mehta, A Menzemer, S Menzione, A Merkel, P Mesropian, C Messina, A Miao, T Miladinovic, N Miles, J Miller, L Miller, R Miller, JS Mills, C Miquel, R Miscetti, S Mitselmakher, G Miyamoto, A Moggi, N Mohr, B Moore, R Morello, M Fernandez, PAM Muelmenstaedt, J Mukherjee, A Mulhearn, M Muller, T Mumford, R Munar, A Murat, P Nachtman, J Nahn, S Nakano, I Napier, A Napora, R Naumov, D Necula, V Nelson, T Neu, C Neubauer, MS Nielsen, J Nigmanov, T Nodulman, L Norniella, O Ogawa, T Oh, SH Oh, YD Ohsugi, T Okusawa, T Oldeman, R Orava, R Orejudos, W Osterberg, K Pagliarone, C Palencia, E Paoletti, R Papadimitriou, V Paramonov, AA Pashapour, S Patrick, J Pauletta, G Paulini, M Paus, C Pellett, D Penzo, A Phillips, TJ Piacentino, G Piedra, J Pitts, KT Plager, C Pondrom, L Pope, G Portell, X Poukhov, O Pounder, N Prakoshyn, F Pronko, A Proudfoot, J Ptohos, F Punzi, G Rademacker, J Rahaman, MA Rakitine, A Rappoccio, S Ratnikov, F Ray, H Reisert, B Rekovic, V Renton, P Rescigno, M Rimondi, F Rinnert, K Ristori, L Robertson, WJ Robson, A Rodrigo, T Rolli, S Roser, R Rossin, R Rott, C Russ, J Rusu, V Ruiz, A Ryan, D Saarikko, H Sabik, S Safonov, A St Denis, R Sakumoto, WK Salamanna, G Saltzberg, D Sanchez, C Santi, L Sarkar, S Sato, K Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Schwarz, T Scodellaro, L Scott, AL Scribano, A Scuri, F Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Sexton-Kennedy, L Sfiligoi, I Shapiro, MD Shears, T Shepard, PF Sherman, D Shimojima, M Shochet, M Shon, Y Shreyber, I Sidoti, A Sill, A Sinervo, P Sisakyan, A Sjolin, J Skiba, A Slaughter, AJ Sliwa, K Smirnov, D Smith, JR Snider, FD Snihur, R Soderberg, M Soha, A Somalwar, SV Spalding, J Spezziga, M Spinella, F Squillacioti, P Stadie, H Stanitzki, M Stelzer, B Stelzer-Chilton, O Stentz, D Strologas, J Stuart, D Suh, JS Sukhanov, A Sumorok, K Sun, H Suzuki, T Taffard, A Tafirout, R Takano, H Takashima, R Takeuchi, Y Takikawa, K Tanaka, M Tanaka, R Tanimoto, N Tecchio, M Teng, PK Terashi, K Tesarek, RJ Tether, S Thom, J Thompson, AS Thomson, E Tipton, P Tiwari, V Tkaczyk, S Toback, D Tollefson, K Tomura, T Tonelli, D Tonnesmann, M Torre, S Torretta, D Tourneur, S Trischuk, W Tsuchiya, R Tsuno, S Tsybychev, D Turini, N Ukegawa, F Unverhau, T Uozumi, S Usynin, D Vacavant, L Vaiciulis, A Varganov, A Vejcik, S Velev, G Veszpremi, V Veramendi, G Vickey, T Vidal, R Vila, I Vilar, R Vollrath, I Volobouev, I von der Mey, M Wagner, P Wagner, RG Wagner, RL Wagner, W Wallny, R Walter, T Wan, Z Wang, MJ Wang, SM Warburton, A Ward, B Waschke, S Waters, D Watts, T Weber, M Wester, WC Whitehouse, B Whiteson, D Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Wittich, P Wolbers, S Wolfe, C Wolter, M Worcester, M Worm, S Wright, T Wu, X Wurthwein, F Wyatt, A Yagil, A Yamashita, T Yamamoto, K Yamaoka, J Yang, C Yang, UK Yao, W Yeh, GP Yoh, J Yorita, K Yoshida, T Yu, I Yu, S Yun, JC Zanello, L Zanetti, A Zaw, I Zetti, F Zhou, J Zucchelli, S CA CDF Collaborat TI Measurement of the t(t)over bar production cross section in p(p)over bar collisions at root s=1.96 TeV using lepton plus jets events with semileptonic B decays to muons SO PHYSICAL REVIEW D LA English DT Article ID PHYSICS; SUPERSYMMETRY AB We present a measurement of the t (t) over bar production cross section using 194 pb(-1) of CDF II data using events with a high transverse momentum electron or muon, three or more jets, and missing transverse energy. The measurement assumes 100% t -> Wb branching fraction. Events consistent with t (t) over bar decay are found by identifying jets containing heavy-flavor semileptonic decays to muons. The dominant backgrounds are evaluated directly from the data. Based on 20 candidate events and an expected background of 9.5 +/- 1.1 events, we measure a production cross section of 5.3 +/- 3.3(-1.0)(+1.3) pb, in agreement with the standard model. C1 Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain. Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy. Brandeis Univ, Waltham, MA 02254 USA. Univ Calif Davis, Davis, CA 95616 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Cantabria, CSIC, Inst Fis, E-39005 Santander, Spain. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Joint Inst Nucl Res, RU-141980 Dubna, Russia. Duke Univ, Durham, NC 27708 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Florida, Gainesville, FL 32611 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Geneva, CH-1211 Geneva, Switzerland. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Harvard Univ, Cambridge, MA 02138 USA. Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00044 Helsinki, Finland. Helsinki Inst Phys, FIN-00044 Helsinki, Finland. Hiroshima Univ, Higashihiroshima 724, Japan. Univ Illinois, Urbana, IL 61801 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany. KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, Japan. Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea. Seoul Natl Univ, Seoul 151742, South Korea. Sungkyunkwan Univ, Suwon 440746, South Korea. Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Liverpool, Liverpool L69 7ZE, Merseyside, England. UCL, London WC1E 6BT, England. MIT, Cambridge, MA 02139 USA. McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada. Univ Toronto, Toronto, ON M5S 1A7, Canada. Univ Michigan, Ann Arbor, MI 48109 USA. Michigan State Univ, E Lansing, MI 48824 USA. Inst Theoret & Expt Phys, Moscow 117259, Russia. Univ New Mexico, Albuquerque, NM 87131 USA. Northwestern Univ, Evanston, IL 60208 USA. Ohio State Univ, Columbus, OH 43210 USA. Okayama Univ, Okayama 7008530, Japan. Osaka City Univ, Osaka 588, Japan. Univ Oxford, Oxford OX1 3RH, England. Univ Padua, Ist Nazl Fis Nucl, Sez Padova Trento, I-35131 Padua, Italy. Univ Penn, Philadelphia, PA 19104 USA. Univ Pisa, Ist Nazl Fis Nucl, Siena, Italy. Scuola Normale Super Pisa, I-56127 Pisa, Italy. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Purdue Univ, W Lafayette, IN 47907 USA. Univ Rochester, Rochester, NY 14627 USA. Rockefeller Univ, New York, NY 10021 USA. Univ Roma La Sapienza, Sez Roma 1, Ist Nazl Fis Nucl, I-00185 Rome, Italy. Rutgers State Univ, Piscataway, NJ 08855 USA. Texas A&M Univ, College Stn, TX 77843 USA. Texas Tech Univ, Lubbock, TX 79409 USA. Univ Trieste, Ist Nazl Fis Nucl, Udine, Italy. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Tufts Univ, Medford, MA 02155 USA. Waseda Univ, Tokyo 169, Japan. Wayne State Univ, Detroit, MI 48201 USA. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06520 USA. RP Acad Sinica, Inst Phys, Taipei 11529, Taiwan. RI Muelmenstaedt, Johannes/K-2432-2015; Introzzi, Gianluca/K-2497-2015; Gorelov, Igor/J-9010-2015; Leonardo, Nuno/M-6940-2016; Canelli, Florencia/O-9693-2016; Ivanov, Andrew/A-7982-2013; Lancaster, Mark/C-1693-2008; Ruiz, Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; Wolter, Marcin/A-7412-2012; St.Denis, Richard/C-8997-2012; Chiarelli, Giorgio/E-8953-2012; Azzi, Patrizia/H-5404-2012; manca, giulia/I-9264-2012; Amerio, Silvia/J-4605-2012; Punzi, Giovanni/J-4947-2012; messina, andrea/C-2753-2013; Annovi, Alberto/G-6028-2012; Warburton, Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014; Lysak, Roman/H-2995-2014; Scodellaro, Luca/K-9091-2014; Connolly, Amy/J-3958-2013; Paulini, Manfred/N-7794-2014; Russ, James/P-3092-2014; Lazzizzera, Ignazio/E-9678-2015; Cabrera Urban, Susana/H-1376-2015; Cavalli-Sforza, Matteo/H-7102-2015; ciocci, maria agnese /I-2153-2015; Prokoshin, Fedor/E-2795-2012 OI Muelmenstaedt, Johannes/0000-0003-1105-6678; Introzzi, Gianluca/0000-0002-1314-2580; Gorelov, Igor/0000-0001-5570-0133; Leonardo, Nuno/0000-0002-9746-4594; Canelli, Florencia/0000-0001-6361-2117; Ivanov, Andrew/0000-0002-9270-5643; Ruiz, Alberto/0000-0002-3639-0368; Chiarelli, Giorgio/0000-0001-9851-4816; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Annovi, Alberto/0000-0002-4649-4398; Warburton, Andreas/0000-0002-2298-7315; Scodellaro, Luca/0000-0002-4974-8330; Paulini, Manfred/0000-0002-6714-5787; Russ, James/0000-0001-9856-9155; Lazzizzera, Ignazio/0000-0001-5092-7531; ciocci, maria agnese /0000-0003-0002-5462; Prokoshin, Fedor/0000-0001-6389-5399 NR 28 TC 30 Z9 30 U1 1 U2 6 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD AUG PY 2005 VL 72 IS 3 AR 032002 DI 10.1103/PhysRevD.72.032002 PG 20 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BJ UT WOS:000231564900007 ER PT J AU Anderson, PR Molina-Paris, C Mottola, E AF Anderson, PR Molina-Paris, C Mottola, E TI Short distance and initial state effects in inflation: Stress tensor and decoherence SO PHYSICAL REVIEW D LA English DT Review ID ENERGY-MOMENTUM TENSOR; QUANTUM-FIELD-THEORY; COSMOLOGICAL PARTICLE CREATION; DE-SITTER SPACE; ADIABATIC REGULARIZATION; SCALAR FIELD; CURVED SPACETIME; DESITTER SPACE; BACK-REACTION; SCHRODINGER-PICTURE AB We present a consistent low energy effective field theory framework for parametrizing the effects of novel short distance physics in inflation, and their possible observational signatures in the cosmic microwave background. We consider the class of general homogeneous, isotropic initial states for quantum scalar fields in Robertson-Walker (RW) spacetimes, subject to the requirement that their ultraviolet behavior be consistent with renormalizability of the covariantly conserved stress tensor which couples to gravity. In the functional Schrodinger picture such states are coherent, squeezed, mixed states characterized by a Gaussian density matrix. This Gaussian has parameters which approach those of the adiabatic vacuum at large wave number, and evolve in time according to an effective classical Hamiltonian. The one complex parameter family of alpha squeezed states in de Sitter spacetime does not fall into this UV allowed class, except for the special value of the parameter corresponding to the Bunch-Davies state. We determine the finite contributions to the inflationary power spectrum and stress tensor expectation value of general UV allowed adiabatic states, and obtain quantitative limits on the observability and backreaction effects of some recently proposed models of short distance modifications of the initial state of inflation. For all UV allowed states, the second order adiabatic basis provides a good description of particles created in the expanding RW universe. Because of the absence of particle creation for the massless, minimally coupled scalar field in de Sitter space, there is no phase decoherence in the simplest free field inflationary models. We apply adiabatic regularization to the renormalization of the decoherence functional in cosmology to corroborate this result. C1 Wake Forest Univ, Dept Phys, Winston Salem, NC 27109 USA. Univ Leeds, Dept Appl Math, Leeds LS2 9JT, W Yorkshire, England. Univ San Pablo, CEU, Fac Farm, Dept Matemat Fis Aplicada & Fis Quim, E-28660 Madrid, Spain. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Anderson, PR (reprint author), Wake Forest Univ, Dept Phys, Winston Salem, NC 27109 USA. NR 112 TC 60 Z9 60 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1550-7998 J9 PHYS REV D JI Phys. Rev. D PD AUG PY 2005 VL 72 IS 4 AR 043515 DI 10.1103/PhysRevD.72.043515 PG 38 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BK UT WOS:000231565000029 ER PT J AU Andreotti, M Bagnasco, S Baldini, W Bettoni, D Borreani, G Buzzo, A Calabrese, R Cester, R Cibinetto, G Dalpiaz, P Garzoglio, G Gollwitzer, KE Graham, M Hu, M Joffe, D Kasper, J Lasio, G Lo Vetere, M Luppi, E Macri, M Mandelkern, M Marchetto, F Marinelli, M Menichetti, E Metreveli, Z Mussa, R Negrini, M Obertino, MM Pallavicini, M Pastrone, N Patrignani, C Pedlar, TK Pordes, S Robutti, E Roethel, W Rosen, JL Rumerio, P Rusack, R Santroni, A Schultz, J Seo, SH Seth, KK Stancari, G Stancari, M Tomaradze, A Uman, I Vidnovic, T Werkema, S Zweber, P AF Andreotti, M Bagnasco, S Baldini, W Bettoni, D Borreani, G Buzzo, A Calabrese, R Cester, R Cibinetto, G Dalpiaz, P Garzoglio, G Gollwitzer, KE Graham, M Hu, M Joffe, D Kasper, J Lasio, G Lo Vetere, M Luppi, E Macri, M Mandelkern, M Marchetto, F Marinelli, M Menichetti, E Metreveli, Z Mussa, R Negrini, M Obertino, MM Pallavicini, M Pastrone, N Patrignani, C Pedlar, TK Pordes, S Robutti, E Roethel, W Rosen, JL Rumerio, P Rusack, R Santroni, A Schultz, J Seo, SH Seth, KK Stancari, G Stancari, M Tomaradze, A Uman, I Vidnovic, T Werkema, S Zweber, P CA Fermilab E835 Collaborat TI Results of a search for the h(c)(P-1(1)) state of charmonium in the eta(c)gamma and J/psi pi(0) decay modes SO PHYSICAL REVIEW D LA English DT Article ID HEAVY-QUARKONIUM; QCD AB We report evidence for the h(c) state of charmonium in its eta(c)gamma decay mode and lack of evidence in the J/psi pi(0) mode. We studied these channels in (p) over barp annihilations near the center of gravity of the P-3(J) states, where the h(c) was reported in the J/psi pi(0) mode by E760, our previous experiment, at 3526.2 +/- 0.15 +/- 0.2 MeV, with Gamma(R)<= 1 MeV. We observe an event excess in the eta(c)gamma mode near 3526 MeV. Testing the null hypothesis of a linearly varying background cross section against the alternate hypothesis that includes a resonance near 3526 MeV, we reject the null hypothesis with P similar to 0.001. The resonance mass is 3525.8 +/- 0.2 +/- 0.2 MeV and the resonance width <= 1 MeV. We estimate 10.0 +/- 3.5 u transitions in B- -> (DK-)-K-0 and B- -> (DK-)-K-*0 SO PHYSICAL REVIEW D LA English DT Article ID CP VIOLATION; MATRIX; DECAYS; GAMMA AB We search for B-->(D) over tilde K-0(-) and B-->(D) over tilde K-*0(-) and charge conjugates. Here the symbol D-0 indicates decay of a D-0 or (D) over bar (0) into K(+)pi(-), while the symbol (D) over tilde (*0) indicates decay of a D-*0 or (D) over bar (*0) to D(0)pi(0) or D(0)gamma. These final states can be reached through the b -> c transition B--> (DK-)-K-(*)0 followed by the doubly Cabibbo-Kobayashi-Maskawa (CKM)-suppressed D-0-> K(+)pi(-), or the b -> u transition B-->(D) over bar K-(*)0(-) followed by the CKM-favored (D) over bar (0)-> K(+)pi(-). The interference of these two amplitudes is sensitive to the angle gamma of the unitarity triangle. Our results are based on 232x10(6) Upsilon(4S)-> B (B) over bar decays collected with the BABAR detector at SLAC. We find no significant evidence for these decays. We set a limit r(B)equivalent to vertical bar A(B-->(D) over bar K-0(-))/A(B--> (DK-)-K-0)vertical bar < 0.23 at 90% C.L. using the most conservative assumptions on the values of the CKM angle gamma and the strong phases in the B and D decay amplitudes. In the case of the D-* we set a 90% C.L. limit r(B)(*2)equivalent to A(B-->(D) over bar K-*0(-))/A(B--> (DK-)-K-*0)(2)<(0.16)(2) which is independent of assumptions on gamma and strong phases. C1 Lab Phys Particules, F-74941 Annecy Le Vieux, France. Univ Autonoma Barcelona, IFAE, E-08193 Barcelona, Spain. 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 Expt Phys, 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. Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany. Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany. Ecole Polytech, LLR, F-91128 Palaiseau, France. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. 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. Heidelberg Univ, 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. Queen Mary Univ London, 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 Fisiche, I-80126 Naples, Italy. Ist Nazl Fis Nucl, I-80126 Naples, Italy. NIKHEF, Natl Inst Nucl Phys & High Energy Phys, 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 Penn, Philadelphia, PA 19104 USA. Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy. Ist Nazl Fis Nucl, I-06100 Perugia, Italy. 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. Univ Oregon, Eugene, OR 97403 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. Univ Valencia, IFIC, CSIC, E-46071 Valencia, Spain. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Univ Basilicata, I-85100 Potenza, Italy. RP Lab Phys Particules, F-74941 Annecy Le Vieux, France. RI Neri, Nicola/G-3991-2012; Roe, Natalie/A-8798-2012; Rotondo, Marcello/I-6043-2012; Lo Vetere, Maurizio/J-5049-2012; de Sangro, Riccardo/J-2901-2012; Saeed, Mohammad Alam/J-7455-2012; Negrini, Matteo/C-8906-2014; Lusiani, Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Grancagnolo, Sergio/J-3957-2015; Della Ricca, Giuseppe/B-6826-2013; Mir, Lluisa-Maria/G-7212-2015; M, Saleem/B-9137-2013; Oyanguren, Arantza/K-6454-2014; Lista, Luca/C-5719-2008; Cavallo, Nicola/F-8913-2012; Patrignani, Claudia/C-5223-2009; Kravchenko, Evgeniy/F-5457-2015; Forti, Francesco/H-3035-2011; Martinez Vidal, F*/L-7563-2014; Monge, Maria Roberta/G-9127-2012; Kolomensky, Yury/I-3510-2015; Di Lodovico, Francesca/L-9109-2016; Morandin, Mauro/A-3308-2016; Bellini, Fabio/D-1055-2009; Calabrese, Roberto/G-4405-2015; Luppi, Eleonora/A-4902-2015; Frey, Raymond/E-2830-2016; Pappagallo, Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; crosetti, nanni/H-3040-2011; Sarti, Alessio/I-2833-2012 OI Neri, Nicola/0000-0002-6106-3756; Rotondo, Marcello/0000-0001-5704-6163; Lo Vetere, Maurizio/0000-0002-6520-4480; de Sangro, Riccardo/0000-0002-3808-5455; Saeed, Mohammad Alam/0000-0002-3529-9255; Negrini, Matteo/0000-0003-0101-6963; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Peters, Klaus/0000-0001-7133-0662; Grancagnolo, Sergio/0000-0001-8490-8304; Della Ricca, Giuseppe/0000-0003-2831-6982; Mir, Lluisa-Maria/0000-0002-4276-715X; Oyanguren, Arantza/0000-0002-8240-7300; Patrignani, Claudia/0000-0002-5882-1747; Forti, Francesco/0000-0001-6535-7965; Martinez Vidal, F*/0000-0001-6841-6035; Monge, Maria Roberta/0000-0003-1633-3195; Kolomensky, Yury/0000-0001-8496-9975; Di Lodovico, Francesca/0000-0003-3952-2175; Morandin, Mauro/0000-0003-4708-4240; Bellini, Fabio/0000-0002-2936-660X; Calabrese, Roberto/0000-0002-1354-5400; Luppi, Eleonora/0000-0002-1072-5633; Frey, Raymond/0000-0003-0341-2636; Pappagallo, Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826; Sarti, Alessio/0000-0001-5419-7951 NR 24 TC 374 Z9 376 U1 2 U2 23 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 AUG PY 2005 VL 72 IS 3 AR 032004 DI 10.1103/PhysRevD.72.032004 PG 14 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BJ UT WOS:000231564900009 ER PT J AU Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges, E Palano, A Pappagallo, M Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Battaglia, M 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 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 Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP Chevalier, N Cottingham, WN Kelly, MP Cuhadar-Donszelmann, T Fulsom, BG Hearty, C Knecht, NS Mattison, TS McKenna, JA Khan, A Kyberd, P Saleem, M Teodorescu, L Blinov, AE Blinov, VE Bukin, AD Druzhinin, VP Golubev, VB Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bondioli, M Bruinsma, M Chao, M Eschrich, I Kirkby, D Lankford, AJ Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Weinstein, AJR Foulkes, SD Gary, JW Long, O Shen, BC Wang, K Zhang, L del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Cunha, A Dahmes, B Hong, TM Mazur, MA Richman, JD Verkerke, W Beck, TW Eisner, AM Flacco, CJ 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 Andreassen, R Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Blanc, F Bloom, P Chen, S Ford, WT Nauenberg, U Olivas, A Rankin, P Ruddick, WO Smith, JG Ulmer, KA Wagner, SR Zhang, J Chen, A Eckhart, EA Soffer, A Toki, WH Wilson, RJ Zeng, Q Altenburg, D Feltresi, E Hauke, A Spaan, B Brandt, T Brose, J Dickopp, M Klose, V Lacker, HM Nogowski, R Otto, S Petzold, A Schott, G Schubert, J Schubert, KR Schwierz, R Sundermann, JE Bernard, D Bonneaud, GR Grenier, P Schrenk, S Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Clark, PJ Gradl, W Muheim, F Playfer, S Xie, Y Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L 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 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 Wu, J Dubitzky, RS Langenegger, U Marks, J Schenk, S Uwer, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Flack, RL Gaillard, JR Morton, GW Nash, JA Nikolich, MB Taylor, GP Vazquez, WP Charles, MJ 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SJ Spitznagel, M Taylor, F Yamamoto, RK Kim, H 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 Viaud, B Nicholson, H Cavallo, N De Nardo, G 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 Benelli, G Gan, KK Honscheid, K Hufnagel, D Jackson, PD Kagan, H Kass, R Pulliam, T Rahimi, AM Ter-Antonyan, R Wong, QK Brau, J Frey, R Igonkina, O Lu, M Potter, CT Sinev, NB Strom, D Strube, J Torrence, E Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Voci, C Benayoun, M Briand, H Chauveau, J David, P Buono, LD de la Vaissiere, C Hamon, O John, MJJ Leruste, P Malcles, J Ocariz, J Roos, L Therin, G Behera, PK Gladney, L Guo, QH Panetta, J Biasini, M Covarelli, R Pacetti, S Pioppi, M Angelini, C Batignani, G Bettarini, S Bucci, F Calderini, G Carpinelli, M Cenci, R Forti, F Giorgi, MA Lusiani, A Marchiori, G Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Walsh, J Haire, M Judd, D Wagoner, DE Biesiada, J Danielson, N Elmer, P Lau, YP Lu, C Olsen, J Smith, AJS Telnov, AV Bellini, F Cavoto, G D'Orazio, A Di Marco, E Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Piredda, G Polci, F Tehrani, FS Voena, C Schroder, H Wagner, G Waldi, R Adye, T De Groot, N Franek, B Gopal, GP Olaiya, EO Wilson, FF Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF Graziani, G de Monchenault, GH Kozanecki, W Legendre, M London, GW Mayer, B Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Abe, T Allen, MT Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Claus, R Convery, MR Cristinziani, M Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W 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 Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Stelzer, J Su, D Sullivan, MK Suzuki, K Swain, S Thompson, JM Va'vra, J Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Yi, K Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Roat, C Ahmed, M Ahmed, S Alam, MS Ernst, JA Saeed, MA Wappler, FR Zain, SB Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Williams, G Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Bomben, M Bosisio, L Cartaro, C Cossutti, F Ricca, GD Dittongo, S Grancagnolo, S Lanceri, L Vitale, L Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Kowalewski, R Roney, JM Sobie, RJ Back, JJ Harrison, PF Latham, TE Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mellado, B Mihalyi, A Pan, Y Prepost, R Tan, P von Wimmersperg-Toeller, JH Wu, SL Yu, Z Neal, H AF Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges, E Palano, A Pappagallo, M Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Battaglia, M 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 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 Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP Chevalier, N Cottingham, WN Kelly, MP Cuhadar-Donszelmann, T Fulsom, BG Hearty, C Knecht, NS Mattison, TS McKenna, JA Khan, A Kyberd, P Saleem, M Teodorescu, L Blinov, AE Blinov, VE Bukin, AD Druzhinin, VP Golubev, VB Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bondioli, M Bruinsma, M Chao, M Eschrich, I Kirkby, D Lankford, AJ Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Weinstein, AJR Foulkes, SD Gary, JW Long, O Shen, BC Wang, K Zhang, L del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Cunha, A Dahmes, B Hong, TM Mazur, MA Richman, JD Verkerke, W Beck, TW Eisner, AM Flacco, CJ 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 Andreassen, R Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Blanc, F Bloom, P Chen, S Ford, WT Nauenberg, U Olivas, A Rankin, P Ruddick, WO Smith, JG Ulmer, KA Wagner, SR Zhang, J Chen, A Eckhart, EA Soffer, A Toki, WH Wilson, RJ Zeng, Q Altenburg, D Feltresi, E Hauke, A Spaan, B Brandt, T Brose, J Dickopp, M Klose, V Lacker, HM Nogowski, R Otto, S Petzold, A Schott, G Schubert, J Schubert, KR Schwierz, R Sundermann, JE Bernard, D Bonneaud, GR Grenier, P Schrenk, S Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Clark, PJ Gradl, W Muheim, F Playfer, S Xie, Y Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L 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 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 Wu, J Dubitzky, RS Langenegger, U Marks, J Schenk, S Uwer, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Flack, RL Gaillard, JR Morton, GW Nash, JA Nikolich, MB Taylor, GP Vazquez, WP Charles, MJ Mader, WF Mallik, U Mohapatra, AK Cochran, J Crawley, HB Eyges, V Meyer, WT Prell, S Rosenberg, EI Rubin, AE Yi, J Arnaud, N Davier, M Giroux, X Grosdidier, G Hocker, A Le Diberder, F Lepeltier, V Lutz, AM Oyanguren, A Petersen, TC Pierini, M Plaszczynski, S Rodier, S Roudeau, P Schune, MH Stocchi, A Wormser, G Cheng, CH Lange, DJ Simani, MC Wright, DM Bevan, AJ Chavez, CA Coleman, JP Forster, IJ Fry, JR Gabathuler, E Gamet, R George, KA Hutchcroft, DE Parry, RJ Payne, DJ Schofield, KC Touramanis, C Cormack, CM Di Lodovico, F Sacco, R Brown, CL Cowan, G Flaecher, HU Green, MG Hopkins, DA Jackson, PS McMahon, TR Ricciardi, S Salvatore, F Brown, D Davis, CL Allison, J Barlow, NR Barlow, RJ Hodgkinson, MC Lafferty, GD Naisbit, MT Williams, JC Chen, C Farbin, A Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Simi, G Blaylock, G Dallapiccola, C Hertzbach, SS Kofler, R Koptchev, VB Li, X Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Koeneke, K Sciolla, G Sekula, SJ Spitznagel, M Taylor, F Yamamoto, RK Kim, H 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 Viaud, B Nicholson, H Cavallo, N De Nardo, G 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 Benelli, G Gan, KK Honscheid, K Hufnagel, D Jackson, PD Kagan, H Kass, R Pulliam, T Rahimi, AM Ter-Antonyan, R Wong, QK Brau, J Frey, R Igonkina, O Lu, M Potter, CT Sinev, NB Strom, D Strube, J Torrence, E Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Voci, C Benayoun, M Briand, H Chauveau, J David, P Buono, LD de la Vaissiere, C Hamon, O John, MJJ Leruste, P Malcles, J Ocariz, J Roos, L Therin, G Behera, PK Gladney, L Guo, QH Panetta, J Biasini, M Covarelli, R Pacetti, S Pioppi, M Angelini, C Batignani, G Bettarini, S Bucci, F Calderini, G Carpinelli, M Cenci, R Forti, F Giorgi, MA Lusiani, A Marchiori, G Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Walsh, J Haire, M Judd, D Wagoner, DE Biesiada, J Danielson, N Elmer, P Lau, YP Lu, C Olsen, J Smith, AJS Telnov, AV Bellini, F Cavoto, G D'Orazio, A Di Marco, E Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Piredda, G Polci, F Tehrani, FS Voena, C Schroder, H Wagner, G Waldi, R Adye, T De Groot, N Franek, B Gopal, GP Olaiya, EO Wilson, FF Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF Graziani, G de Monchenault, GH Kozanecki, W Legendre, M London, GW Mayer, B Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Abe, T Allen, MT Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Claus, R Convery, MR Cristinziani, M Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W 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 Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Stelzer, J Su, D Sullivan, MK Suzuki, K Swain, S Thompson, JM Va'vra, J Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Yi, K Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Roat, C Ahmed, M Ahmed, S Alam, MS Ernst, JA Saeed, MA Wappler, FR Zain, SB Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Williams, G Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Bomben, M Bosisio, L Cartaro, C Cossutti, F Ricca, GD Dittongo, S Grancagnolo, S Lanceri, L Vitale, L Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Kowalewski, R Roney, JM Sobie, RJ Back, JJ Harrison, PF Latham, TE Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mellado, B Mihalyi, A Pan, Y Prepost, R Tan, P von Wimmersperg-Toeller, JH Wu, SL Yu, Z Neal, H CA BABAR Collaboration TI Measurement of double charmonium production in e(+)e(-) annihilations at root s=10.6 GeV SO PHYSICAL REVIEW D LA English DT Article AB We study e(+)e(-)-> J/psi c ($) over bar by measuring the invariant mass distribution recoiling against fully reconstructed J/psi decays, using 124 fb(-1) of data collected at a center-of-mass energy of 10.6 GeV with the BABAR detector. We observe signals for eta(c)(1S), chi(c0), and eta(c)(2S) in the recoil mass distribution, thus confirming previous measurements. We measure sigma(e(+)e(-)-> J/psi+c (c) over bar )B(c (c) over bar ->> 2 charged) to be 17.6 +/- 2.8(stat)(-2.1)(+1.5)(syst) fb, 10.3 +/- 2.5(stat)(-1.8)(+1.4)(syst) fb, and 16.4 +/- 3.7(stat)(-3.0)(+2.4)(syst) fb with c (c) over bar=eta(c)(1S), chi(c0), and eta(c)(2S), respectively. C1 Lab Phys Particules, F-74941 Annecy Le Vieux, France. Univ Autonoma Barcelona, IFAE, E-08193 Barcelona, Spain. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Univ Bari, Dipartmento Fis, 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 Expt Phys, 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. Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany. Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany. Ecole Polytech, 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. 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. Heidelberg Univ, 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. Queen Mary Univ London, 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 Fisiche, I-80126 Naples, Italy. Ist Nazl Fis Nucl, I-80126 Naples, Italy. NIKHEF, Natl Inst Nucl Phys & High Energy Phys, 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 Penn, Philadelphia, PA 19104 USA. Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy. Ist Nazl Fis Nucl, I-06100 Perugia, Italy. 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, Dipartmento Fis, I-34127 Trieste, Italy. Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Univ Valencia, IFIC, CSIC, E-46071 Valencia, Spain. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. RP Lab Phys Particules, F-74941 Annecy Le Vieux, France. RI Neri, Nicola/G-3991-2012; Roe, Natalie/A-8798-2012; Rotondo, Marcello/I-6043-2012; Lo Vetere, Maurizio/J-5049-2012; de Sangro, Riccardo/J-2901-2012; Saeed, Mohammad Alam/J-7455-2012; Negrini, Matteo/C-8906-2014; Lusiani, Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Grancagnolo, Sergio/J-3957-2015; Della Ricca, Giuseppe/B-6826-2013; Mir, Lluisa-Maria/G-7212-2015; M, Saleem/B-9137-2013; Oyanguren, Arantza/K-6454-2014; Lista, Luca/C-5719-2008; Cavallo, Nicola/F-8913-2012; Patrignani, Claudia/C-5223-2009; Kravchenko, Evgeniy/F-5457-2015; Forti, Francesco/H-3035-2011; Martinez Vidal, F*/L-7563-2014; Monge, Maria Roberta/G-9127-2012; Kolomensky, Yury/I-3510-2015; Di Lodovico, Francesca/L-9109-2016; Morandin, Mauro/A-3308-2016; Bellini, Fabio/D-1055-2009; Calabrese, Roberto/G-4405-2015; Luppi, Eleonora/A-4902-2015; Frey, Raymond/E-2830-2016; Pappagallo, Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; crosetti, nanni/H-3040-2011; Sarti, Alessio/I-2833-2012 OI Neri, Nicola/0000-0002-6106-3756; Rotondo, Marcello/0000-0001-5704-6163; Lo Vetere, Maurizio/0000-0002-6520-4480; de Sangro, Riccardo/0000-0002-3808-5455; Saeed, Mohammad Alam/0000-0002-3529-9255; Negrini, Matteo/0000-0003-0101-6963; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Peters, Klaus/0000-0001-7133-0662; Grancagnolo, Sergio/0000-0001-8490-8304; Della Ricca, Giuseppe/0000-0003-2831-6982; Mir, Lluisa-Maria/0000-0002-4276-715X; Oyanguren, Arantza/0000-0002-8240-7300; Patrignani, Claudia/0000-0002-5882-1747; Forti, Francesco/0000-0001-6535-7965; Martinez Vidal, F*/0000-0001-6841-6035; Monge, Maria Roberta/0000-0003-1633-3195; Kolomensky, Yury/0000-0001-8496-9975; Di Lodovico, Francesca/0000-0003-3952-2175; Morandin, Mauro/0000-0003-4708-4240; Bellini, Fabio/0000-0002-2936-660X; Calabrese, Roberto/0000-0002-1354-5400; Luppi, Eleonora/0000-0002-1072-5633; Frey, Raymond/0000-0003-0341-2636; Pappagallo, Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826; Sarti, Alessio/0000-0001-5419-7951 NR 19 TC 374 Z9 376 U1 2 U2 23 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 AUG PY 2005 VL 72 IS 3 AR 031101 DI 10.1103/PhysRevD.72.031101 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BJ UT WOS:000231564900001 ER PT J AU Berge, S Nadolsky, PM Olness, FI Yuan, CP AF Berge, S Nadolsky, PM Olness, FI Yuan, CP TI Transverse momentum resummation at small x for the Fermilab Tevatron and CERN LHC SO PHYSICAL REVIEW D LA English DT Article ID DEEP-INELASTIC-SCATTERING; HIGGS-BOSON PRODUCTION; PERPENDICULAR-TO HADRONS; INITIAL-STATE RADIATION; SOFT GLUON RESUMMATION; ENERGY-FLOW; PERTURBATION-THEORY; CROSS-SECTIONS; LEADING-ORDER; EP SCATTERING AB Analysis of semi-inclusive hadroproduction in deep inelastic scattering suggests broadening of transverse momentum distributions at x below a few 10(-3), which can be modeled in the Collins-Soper-Sterman formalism by a modification of impact-parameter-dependent parton densities. We discuss the consequences of such a modification for the production of electroweak bosons at hadron-hadron colliders. If substantial small-x broadening is observed in forward Z(0) boson production in the Tevatron Run-2, it will strongly affect predicted q(T) distributions for W+/-, Z(0), and Higgs boson production at the Large Hadron Collider. C1 So Methodist Univ, Dept Phys, Dallas, TX 75275 USA. Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA. Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. RP So Methodist Univ, Dept Phys, Dallas, TX 75275 USA. EM berge@mail.physics.smu.edu; nadolsky@hep.anl.gov; olness@smu.edu; yuan@pa.msu.edu NR 80 TC 31 Z9 31 U1 0 U2 0 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 AUG PY 2005 VL 72 IS 3 AR 033015 DI 10.1103/PhysRevD.72.033015 PG 16 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BJ UT WOS:000231564900025 ER PT J AU Bern, Z Dixon, LJ Kosower, DA AF Bern, Z Dixon, LJ Kosower, DA TI All next-to-maximally-helicity-violating one-loop gluon amplitudes in N=4 super-Yang-Mills theory SO PHYSICAL REVIEW D LA English DT Article ID GAUGE-THEORY AMPLITUDES; TWISTOR SPACE; MULTIPLE BREMSSTRAHLUNG; CROSS-SECTIONS; QCD AMPLITUDES; MHV VERTICES; SCATTERING; UNITARITY; ANNIHILATION; COEFFICIENTS AB We compute the next-to-MHV one-loop n-gluon amplitudes in N=4 super-Yang-Mills theory. These amplitudes contain three negative-helicity gluons and an arbitrary number of positive-helicity gluons, and are the first infinite series of amplitudes beyond the simplest, MHV, amplitudes. We also discuss some aspects of their twistor-space structure. C1 Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. CEA Saclay, Serv Phys Theor, F-91191 Gif Sur Yvette, France. RP Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. NR 72 TC 80 Z9 80 U1 0 U2 0 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 AUG PY 2005 VL 72 IS 4 AR 045014 DI 10.1103/PhysRevD.72.045014 PG 17 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BK UT WOS:000231565000092 ER PT J AU Cardall, CY Lentz, EJ Mezzacappa, A AF Cardall, CY Lentz, EJ Mezzacappa, A TI Conservative special relativistic radiative transfer for multidimensional astrophysical simulations: Motivation and elaboration SO PHYSICAL REVIEW D LA English DT Article ID BOLTZMANN NEUTRINO TRANSPORT; CORE-COLLAPSE SUPERNOVAE; POSTBOUNCE EVOLUTION; COMPTON-SCATTERING; IA SUPERNOVAE; MOVING-MEDIA; HYDRODYNAMICS; TIME; MULTIGROUP; MECHANISM AB Many astrophysical phenomena exhibit relativistic radiative flows. While velocities in excess of v similar to 0.1c can occur in these systems, it has been common practice to approximate radiative transfer to O(v/c). In the case of neutrino transport in core-collapse supernovas, this approximation gives rise to an inconsistency between lepton number transfer and lab-frame energy transfer, which have different O(v/c) limits. A solution used in spherically symmetric O(v/c) simulations has been to retain, for energy accounting purposes, the O(v(2)/c(2)) terms in the lab-frame energy transfer equation that arise from the O(v/c) neutrino number transport equation. Avoiding the proliferation of such extra O(v(2)/c(2)) terms in the absence of spherical symmetry motivates a special relativistic formalism, which we exhibit in coordinates sufficiently general to encompass Cartesian, spherical, and cylindrical coordinate systems. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA. RP Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. EM cardallcy@ornl.gov; lentz@phy.ornl.gov; mezzacappaa@ornl.gov RI Lentz, Eric/M-7173-2015; Mezzacappa, Anthony/B-3163-2017 OI Lentz, Eric/0000-0002-5231-0532; Mezzacappa, Anthony/0000-0001-9816-9741 NR 35 TC 18 Z9 18 U1 0 U2 0 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 AUG PY 2005 VL 72 IS 4 AR 043007 DI 10.1103/PhysRevD.72.043007 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BK UT WOS:000231565000012 ER PT J AU Christensen, J Wilcox, W Lee, FX Zhou, LM AF Christensen, J Wilcox, W Lee, FX Zhou, LM TI Electric polarizability of neutral hadrons from lattice QCD SO PHYSICAL REVIEW D LA English DT Article ID COMPTON-SCATTERING; ELECTROMAGNETIC STRUCTURE; DECAY CONSTANTS; NUCLEON; EIGENVALUES; DEFLATION; MASSES; ORDER AB By simulating a uniform electric field on a lattice and measuring the change in the rest mass, we calculate the electric polarizability of neutral mesons and baryons using the methods of quenched lattice QCD. Specifically, we measure the electric polarizability coefficient from the quadratic response to the electric field for 10 particles: the vector mesons rho(0) and K-*0; the octet baryons n, Sigma(0), Lambda(0), and Xi(0); and the decuplet baryons Delta(0), Sigma(*0), and Xi(*0). Independent calculations using two fermion actions were done for consistency and comparison purposes. One calculation uses Wilson fermions with a lattice spacing of a=0.10 fm. The other uses tadpole-improved Luscher-Weisz gauge fields and clover quark action with a lattice spacing a=0.17 fm. Our results for neutron electric polarizability are compared to experiment. C1 McMurry Univ, Dept Phys, Abilene, TX 79697 USA. Baylor Univ, Dept Phys, Waco, TX 76798 USA. George Washington Univ, Ctr Nucl Studies, Washington, DC 20052 USA. Jefferson Lab, Newport News, VA 23606 USA. RP Christensen, J (reprint author), McMurry Univ, Dept Phys, Abilene, TX 79697 USA. OI Lee, Frank/0000-0001-8169-3440 NR 23 TC 30 Z9 30 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1550-7998 J9 PHYS REV D JI Phys. Rev. D PD AUG PY 2005 VL 72 IS 3 AR 034503 DI 10.1103/PhysRevD.72.034503 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BJ UT WOS:000231564900068 ER PT J AU Diaz-Cruz, JL Ferrandis, J AF Diaz-Cruz, JL Ferrandis, J TI Solving the supersymmetric CP problem with flavor breaking F terms SO PHYSICAL REVIEW D LA English DT Review ID ELECTRIC-DIPOLE MOMENTS; RADIATIVE FERMION MASSES; LARGE TAN-BETA; B-MESON DECAY; PI-PI DECAYS; X-S-GAMMA; STANDARD MODEL; QCD FACTORIZATION; SPLIT SUPERSYMMETRY; CHARGINO CONTRIBUTIONS AB Supersymmetric flavor models for the radiative generation of fermion masses offer an alternative way to solve the SUSY-CP problem. We assume that the supersymmetric theory is flavor and CP conserving. CP violating phases are associated to the vacuum expectation values of flavor violating SUSY-breaking fields. As a consequence, phases appear at tree level only in the soft supersymmetry-breaking matrices. Using a U(2) flavor model as an example we show that it is possible to generate radiatively the first and second generation of quark masses and mixings as well as the Cabibbo-Kobayashi-Maskawa (CKM) CP phase. The one-loop supersymmetric contributions to electric dipole moments are automatically zero since all the relevant parameters in the Lagrangian are flavor conserving and as a consequence real. The size of the flavor and CP mixing in the SUSY-breaking sector is mostly determined by the fermion mass ratios and CKM elements. We calculate the contributions to epsilon, epsilon(') and to the CP asymmetries in the B decays to psi K-s, phi K-s, eta(')K(s) and X(s)gamma. We analyze a case study with maximal predictivity in the fermion sector. For this worst case scenario the measurements of Delta m(K), Delta m(B) and epsilon constrain the model requiring extremely heavy squark spectra. C1 Cuerpo Acad Particulas, Campos & Relat FCFM, Puebla 72000, Mexico. Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA. RP Cuerpo Acad Particulas, Campos & Relat FCFM, Ap Postal 1364, Puebla 72000, Mexico. EM lorenzo.diaz@fcfm.buap.mx; ferrandis@mac.com NR 233 TC 12 Z9 12 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 AUG PY 2005 VL 72 IS 3 AR 035003 DI 10.1103/PhysRevD.72.035003 PG 22 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BJ UT WOS:000231564900075 ER PT J AU Diehl, M Kugler, W Schafer, A Weiss, C AF Diehl, M Kugler, W Schafer, A Weiss, C TI Exclusive channels in semi-inclusive production of pions and kaons SO PHYSICAL REVIEW D LA English DT Article ID GENERALIZED PARTON DISTRIBUTIONS; INELASTIC LEPTON SCATTERING; FORM-FACTOR; PSEUDOSCALAR MESONS; ELECTROPRODUCTION; QCD; HERMES; HYDROGEN; NUCLEON; GLUONS AB We investigate the role of exclusive channels in semi-inclusive electroproduction of pions and kaons. Using the QCD factorization theorem for hard exclusive processes we evaluate the cross sections for exclusive pseudoscalar and vector meson production in terms of generalized parton distributions and meson distribution amplitudes. We investigate the uncertainties arising from the modeling of the nonperturbative input quantities. Combining these results with available experimental data, we compare the cross sections for exclusive channels to that obtained from quark fragmentation in semi-inclusive deep inelastic scattering. We find that rho(0) production is the only exclusive channel with significant contributions to semi-inclusive pion production at large z and moderate Q(2). The corresponding contribution to kaon production from the decay of exclusively produced phi and K-* is rather small. C1 DESY, Deutsch Elektron Synchroton, D-22603 Hamburg, Germany. Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany. Jefferson Lab, Theory Grp, Newport News, VA 23606 USA. RP DESY, Deutsch Elektron Synchroton, D-22603 Hamburg, Germany. NR 65 TC 15 Z9 15 U1 0 U2 0 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 AUG PY 2005 VL 72 IS 3 AR 034034 DI 10.1103/PhysRevD.72.034034 PG 24 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BJ UT WOS:000231564900062 ER PT J AU Goity, JL Scoccola, NN AF Goity, JL Scoccola, NN TI Decays of nonstrange positive parity excited baryons in the 1/N-c expansion SO PHYSICAL REVIEW D LA English DT Article ID LARGE-N-C; MASSES; QCD AB The decays of nonstrange positive parity excited baryons via emission of a pseudoscalar meson are studied in the framework of the 1/N-c expansion to order 1/N-c. In particular, the pionic decays of the l=0 Roper baryons and of the l=2 baryons in the mass interval 1680-1950 MeV are analyzed using the available partial decay widths. Decay widths by emission of an eta meson are shown to be suppressed by a factor 1/N-c(2) with respect to the pionic ones. C1 Hampton Univ, Dept Phys, Hampton, VA 23668 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Comis Nacl Energia Atom, Dept Phys, RA-1429 Buenos Aires, DF, Argentina. Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, Argentina. Univ Favaloro, RA-1078 Buenos Aires, DF, Argentina. RP Hampton Univ, Dept Phys, Hampton, VA 23668 USA. EM goity@jlab.org; scoccola@tandar.cnea.gov.ar NR 23 TC 17 Z9 17 U1 0 U2 3 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 AUG PY 2005 VL 72 IS 3 AR 034024 DI 10.1103/PhysRevB.72.034024 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BJ UT WOS:000231564900052 ER PT J AU Linder, EV AF Linder, EV TI Cosmic growth history and expansion history SO PHYSICAL REVIEW D LA English DT Article ID LIGHT-PROPAGATION; DARK ENERGY; INHOMOGENEOUS UNIVERSES; APPROXIMATION SCHEME; GENERAL-RELATIVITY; MODELS; PERTURBATIONS; CONSTRAINTS; PRESSURE AB The cosmic expansion history tests the dynamics of the global evolution of the universe and its energy density contents, while the cosmic growth history tests the evolution of the inhomogeneous part of the energy density. Precision comparison of the two histories can distinguish the nature of the physics responsible for the accelerating cosmic expansion: an additional smooth component-dark energy-or a modification of the gravitational field equations. With the aid of a new fitting formula for linear perturbation growth accurate to 0.05%-0.2%, we separate out the growth dependence on the expansion history and introduce a new growth index parameter gamma that quantifies the gravitational modification. C1 Lawrence Berkeley Lab, Div Phys, Berkeley, CA 94720 USA. RP Lawrence Berkeley Lab, Div Phys, Berkeley, CA 94720 USA. NR 39 TC 386 Z9 386 U1 1 U2 10 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 AUG PY 2005 VL 72 IS 4 AR 043529 DI 10.1103/PhysRevD.72.043529 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BK UT WOS:000231565000043 ER PT J AU Linder, EV Huterer, D AF Linder, EV Huterer, D TI How many dark energy parameters? SO PHYSICAL REVIEW D LA English DT Article ID POWER SPECTRA; QUINTESSENCE; MATTER AB For exploring the physics behind the accelerating Universe a crucial question is how much we can learn about the dynamics through next generation cosmological experiments. For example, in defining the dark energy behavior through an effective equation of state, how many parameters can we realistically expect to tightly constrain? Through both general and specific examples (including new parametrizations and principal component analysis) we argue that the answer is two. Cosmological parameter analyses involving a measure of the equation of state value at some epoch (e.g. w(0)) and a measure of the change in equation of state (e.g. w(')) are therefore realistic in projecting dark energy parameter constraints. More elaborate parametrizations could have some uses (e.g. testing for bias or comparison with model features), but do not lead to accurately measured dark energy parameters. C1 Lawrence Berkeley Lab, Div Phys, Berkeley, CA 94720 USA. Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA. Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA. RP Lawrence Berkeley Lab, Div Phys, Berkeley, CA 94720 USA. NR 33 TC 91 Z9 92 U1 0 U2 0 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 AUG PY 2005 VL 72 IS 4 AR 043509 DI 10.1103/PhysRevD.72.043509 PG 10 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BK UT WOS:000231565000023 ER PT J AU Londergan, JT Murdock, DP Thomas, AW AF Londergan, JT Murdock, DP Thomas, AW TI Experimental tests of charge symmetry violation in parton distributions SO PHYSICAL REVIEW D LA English DT Article ID DEEP-INELASTIC SCATTERING; QUARK DISTRIBUTIONS; GOTTFRIED SUM; HIGH ENERGIES; DRELL-YAN; PROTON; PION; COLLISIONS; NUCLEON; LEPTOPRODUCTION AB Recently, a global phenomenological fit to high energy data has included charge symmetry breaking terms, leading to limits on the allowed magnitude of such effects. We discuss two possible experiments that could search for isospin violation in valence parton distributions. We show that, given the magnitude of charge symmetry violation consistent with existing global data, such experiments might expect to see effects at a level of several percent. Alternatively, such experiments could significantly decrease the upper limits on isospin violation in parton distributions. C1 Indiana Univ, Dept Phys, Bloomington, IN 47405 USA. Indiana Univ, Ctr Nucl Theory, Bloomington, IN 47405 USA. Tennessee Technol Univ, Dept Phys, Cookeville, TN 38505 USA. Jefferson Lab, Newport News, VA 23606 USA. RP Londergan, JT (reprint author), Indiana Univ, Dept Phys, Bloomington, IN 47405 USA. EM tlonderg@indiana.edu; murdock@tntech.edu; awthomas@jlab.org RI Thomas, Anthony/G-4194-2012 OI Thomas, Anthony/0000-0003-0026-499X NR 35 TC 4 Z9 4 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1550-7998 J9 PHYS REV D JI Phys. Rev. D PD AUG PY 2005 VL 72 IS 3 AR 036010 DI 10.1103/PhysRevD.72.036010 PG 10 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BJ UT WOS:000231564900100 ER PT J AU Majumder, A Wang, XN AF Majumder, A Wang, XN TI Evolution of the parton dihadron fragmentation functions SO PHYSICAL REVIEW D LA English DT Article ID ENERGY-LOSS; PERTURBATIVE QCD; SMALL-X; SCATTERING; JETS; DISTRIBUTIONS; NUCLEI; ANNIHILATION; COLLISIONS; ORDER AB Quark and gluon parton dihadron fragmentation functions and their evolution are studied in the process of e(+)e(-) annihilation. We provide definitions of such dihadron fragmentation functions in terms of parton matrix elements and derive the momentum sum rules and their connection to single hadron fragmentation functions. We parametrize results from the Lund Monte Carlo model JETSET as the initial conditions for the parton dihadron fragmentation functions at the scale Q(0)(2)=2 GeV2. The evolution equations for the quark and gluon fragmentation functions are solved numerically and the results at different higher scales Q(2) agree well with JETSET results. The importance of the input from the single fragmentation functions is pointed out. C1 Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Majumder, A (reprint author), Lawrence Berkeley Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. OI Wang, Xin-Nian/0000-0002-9734-9967 NR 37 TC 21 Z9 21 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1550-7998 J9 PHYS REV D JI Phys. Rev. D PD AUG PY 2005 VL 72 IS 3 AR 034007 DI 10.1103/PhysRevD.72.034007 PG 14 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BJ UT WOS:000231564900035 ER PT J AU Marandella, G Schappacher, C Strumia, A AF Marandella, G Schappacher, C Strumia, A TI Little-Higgs corrections to precision data after CERN LEP2 SO PHYSICAL REVIEW D LA English DT Article ID SUPERSYMMETRIC STANDARD MODEL; ELECTROWEAK SYMMETRY-BREAKING; PSEUDO-GOLDSTONE PARTICLES; TECHNICOLOR THEORIES; LOOP CALCULATIONS; PARAMETERS; DIMENSIONS; FEYNARTS; HIERARCHY; FORMCALC AB We reconsider little-Higgs corrections to precision data. In five models with global symmetries SU(5), SU(6), SO(9) corrections are (although not explicitly) of "universal" type. We get simple expressions for the (S) over cap,(T) over cap ,W,Y parameters, which summarize all effects. In all models W,Y >= 0 and in almost all models S<^>>(W+Y)/2. Results differ from previous analyses, which are sometimes incomplete, sometimes incorrect, and because we add LEP2 e (e) over bar -> f (f) over bar cross sections to the data set. Depending on the model, the constraint on f ranges between 2 and 20 TeV. We next study the simplest little-Higgs model (and propose a related model) which is not universal and affects precision data due to the presence of an extra Z(') vector. By restricting the data set to the most accurate leptonic data we show how corrections to precision data generated by a generic Z' can be encoded in four effective (S) over cap,(T) over cap ,W,Y parameters, giving their expressions. C1 Los Alamos Natl Lab, Theoret Div T8, Los Alamos, NM 87545 USA. Univ Karlsruhe, Inst Theoret Phys, D-7500 Karlsruhe, Germany. Univ Pisa, Dipartimento Fis, Pisa, Italy. Ist Nazl Fis Nucl, Pisa, Italy. RP Los Alamos Natl Lab, Theoret Div T8, Los Alamos, NM 87545 USA. NR 54 TC 83 Z9 83 U1 0 U2 0 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 AUG PY 2005 VL 72 IS 3 AR 035014 DI 10.1103/PhysRevD.72.035014 PG 11 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BJ UT WOS:000231564900086 ER PT J AU Mehen, T Springer, RP AF Mehen, T Springer, RP TI Even- and odd-parity charmed meson masses in heavy hadron chiral perturbation theory SO PHYSICAL REVIEW D LA English DT Article ID QUARK EFFECTIVE THEORY; SCALAR MESONS; B-DECAYS; SYMMETRY; STATES; MODEL; DYNAMICS; WAVE AB We derive mass formulas for the ground state, J(P)=0(-) and 1(-), and first excited even-parity, J(P)=0(+) and 1(+), charmed mesons including one-loop chiral corrections and O(1/m(c)) counterterms in heavy hadron chiral perturbation theory. We show that including these counterterms is critical for fitting the current data. We find that certain parameter relations in the parity doubling model are not renormalized at one-loop, providing a natural explanation for the observed equality of the hyperfine splittings of ground state and excited doublets. C1 Duke Univ, Dept Phys, Durham, NC 27708 USA. Jefferson Lab, Newport News, VA 23606 USA. RP Duke Univ, Dept Phys, Durham, NC 27708 USA. EM mehen@phy.duke.edu; rps@phy.duke.edu NR 62 TC 22 Z9 22 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD AUG PY 2005 VL 72 IS 3 AR 034006 DI 10.1103/PhysRevD.72.034006 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BJ UT WOS:000231564900034 ER PT J AU Mukherjee, A Stratmann, M Vogelsang, W AF Mukherjee, A Stratmann, M Vogelsang, W TI Next-to-leading order QCD corrections to single-inclusive hadron production in transversely polarized pp and p(p)over-bar collisions SO PHYSICAL REVIEW D LA English DT Article ID PROMPT PHOTON PRODUCTION; DRELL-YAN PROCESSES; ODD PARTON DISTRIBUTIONS; HARD SCATTERING; FACTORIZATION; PROTONS; RENORMALIZATION; CONSTRAINTS; PREDICTIONS; QUARKS AB We present a calculation of the next-to-leading order QCD corrections to the partonic cross sections contributing to single-inclusive high-p(T) hadron production in collisions of transversely polarized hadrons. We use a recently developed projection technique for treating the phase-space integrals in the presence of the cos(2 Phi) azimuthal-angular dependence associated with transverse polarization. Our phenomenological results show that the double-spin asymmetry A(TT)(pi) for neutral-pion production is expected to be very small for polarized pp scattering at RHIC and could be much larger for the proposed experiments with an asymmetric (p) over barp collider at the GSI. C1 Leiden Univ, Inst Lorentz, NL-2300 RA Leiden, Netherlands. Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA. RP Mukherjee, A (reprint author), Leiden Univ, Inst Lorentz, NL-2300 RA Leiden, Netherlands. NR 55 TC 11 Z9 11 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1550-7998 J9 PHYS REV D JI Phys. Rev. D PD AUG PY 2005 VL 72 IS 3 AR 034011 DI 10.1103/PhysRevB.72.034011 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BJ UT WOS:000231564900039 ER PT J AU Sasaki, K Sasaki, S AF Sasaki, K Sasaki, S TI Excited baryon spectroscopy from lattice QCD: Finite size effect and hyperfine mass splitting SO PHYSICAL REVIEW D LA English DT Article ID ROPER RESONANCE; HADRON MASSES; SPECTRUM; NUCLEON; STATES AB A study of the finite-size effect is carried out for spectra of both ground-state and excited-state baryons in quenched lattice QCD using Wilson fermions. Our simulations are performed at beta=6/g(2)=6.2 with three different spatial sizes, La similar to 1.6, 2.2 and 3.2 fm. It is found that the physical lattice size larger than 3 fm is required for Delta states in all spin-parity (J(P)=1/2(+/-),3/2(+/-)) channels and also negative-parity nucleon (N-*) state (J(P)=1/2(-)) even in the rather heavy quark mass region (M-pi similar to 1.0 GeV). We also find a peculiar behavior of the finite-size effect on the hyperfine mass splittings between the nucleon and the Delta in both parity channels. C1 Univ Tokyo, Dept Phys, Tokyo 1130033, Japan. Brookhaven Natl Lab, RIKEN, BNL, Res Ctr, Upton, NY 11973 USA. RP Univ Tokyo, Dept Phys, Tokyo 1130033, Japan. NR 33 TC 27 Z9 27 U1 0 U2 0 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 AUG PY 2005 VL 72 IS 3 AR 034502 DI 10.1103/PhysRevD.72.034502 PG 13 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BJ UT WOS:000231564900067 ER PT J AU Tackmann, FJ AF Tackmann, FJ TI Full-phase-space twist expansion in semileptonic and radiative B-meson decays SO PHYSICAL REVIEW D LA English DT Article ID UB-VERTICAL-BAR; V-UB; REPARAMETERIZATION INVARIANCE; LEPTON SPECTRUM; MASS-SPECTRUM; QCD; DISTRIBUTIONS; FACTORIZATION; B->X(S)GAMMA AB We study the Lambda(QCD)/M-B corrections from subleading shape functions in inclusive B-meson decays. We propose a natural and smooth interpolation from the endpoint region to the full phase space, and derive expressions for the triple differential decay rate in B -> X(u)l (nu) over bar (l) and the photon energy spectrum in B -> X-s gamma. Our results are valid to order Lambda(QCD)/M-B for hadronic invariant masses of order Lambda M-QCD(B) and to order Lambda(2)(QCD)/M-B(2) for larger hadronic masses. They allow a systematic investigation of the transition between the separate regimes of the local and nonlocal expansions, and can be used to study decay distributions in any kinematic variables. We consider several examples of interest and point out that a combined measurement of hadronic energy and invariant mass provides an alternative to the extraction of parallel to V-ub parallel to which is largely independent of shape-function effects and in principle allows a higher accuracy than the combined measurement of leptonic and hadronic invariant masses. We perform the expansion directly in QCD light-cone operators, and give a discussion of the general basis of light-cone operators. Reparametrization invariance under the change of the light-cone direction reduces the number of independent shape functions. We show that differing previous results for the lepton energy spectrum obtained from different choices of light-cone coordinates are in agreement. C1 Univ Calif Berkeley, Dept Phys, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Dept Phys, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. NR 50 TC 11 Z9 11 U1 0 U2 0 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 AUG PY 2005 VL 72 IS 3 AR 034036 DI 10.1103/PhysRevD.72.034036 PG 29 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BJ UT WOS:000231564900064 ER PT J AU White, AR AF White, AR TI Physics of a sextet quark sector - art. no. 063007 SO PHYSICAL REVIEW D LA English DT Article ID HIGH-ENERGY AMPLITUDES; ABELIAN GAUGE-THEORIES; MULTI-REGGE THEORY; YANG-MILLS THEORY; COSMIC-RAYS; SUPERCRITICAL POMERON; QCD; COLLISIONS; SCATTERING; EVENTS AB Electroweak symmetry breaking may be a consequence of color sextet quark chiral symmetry breaking. A special solution of QCD is involved, with a high-energy S-Matrix that can be constructed "semiperturbatively" via the chiral anomaly and Reggeon diagrams. An infrared fixed point and color superconductivity are crucial components of the construction. Infinite-momentum physical states contain both quarks and a universal "anomalous wee gluon" component, and the spectrum is more limited than is required by confinement and chiral symmetry breaking. The Pomeron is approximately a Regge pole and the Critical Pomeron describes asymptotic cross sections. The strong coupling of the Pomeron to the electroweak sector could produce large x and Q(2) events at HERA, and vector boson pairs at Fermilab. Further evidence for the sextet sector at Fermilab would be a large E-T jet excess, due in part to the nonevolution of alpha(s), and other phenomena related to the possibility that top quark production is due to the eta(6). The sextet proton and neutron are the only new baryonic states. Sextet states dominate high-energy hadronic cross sections and stable sextet neutrons could produce both dark matter and ultrahigh energy cosmic rays. The cosmic ray spectrum knee suggests the effective sextet threshold is between Fermilab and LHC energies, with large cross-section effects expected at the LHC. Jet and vector boson cross sections will be very much larger than expected, and sextet baryons should also be produced. Double Pomeron produced states could provide definitive evidence for the existence of the sextet sector in the initial low luminosity running. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM arw@hep.anl.gov NR 54 TC 11 Z9 11 U1 0 U2 0 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 AUG PY 2005 VL 72 IS 3 AR 036007 DI 10.1103/PhysRevD.72.036007 PG 37 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 960BJ UT WOS:000231564900097 ER PT J AU Ben-Naim, E Machta, B Machta, J AF Ben-Naim, E Machta, B Machta, J TI Power-law velocity distributions in granular gases SO PHYSICAL REVIEW E LA English DT Article ID HIGH-ENERGY TAILS; BOLTZMANN EQUATIONS; HYDRODYNAMICS; INSTABILITY; COLLISIONS; DYNAMICS; COLLAPSE; FLOWS; MEDIA AB The kinetic theory of granular gases is studied for spatially homogeneous systems. At large velocities, the equation governing the velocity distribution becomes linear, and it admits stationary solutions with a power-law tail, f(v)similar to v(-sigma). This behavior holds in arbitrary dimension for arbitrary collision rates including both hard spheres and Maxwell molecules. Numerical simulations show that driven steady states with the same power-law tail can be realized by injecting energy into the system at very high energies. In one dimension, we also obtain self-similar time-dependent solutions where the velocities collapse to zero. At small velocities there is a steady state and a power-law tail but at large velocities, the behavior is time dependent with a stretched exponential decay. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Brown Univ, Dept Phys, Providence, RI 02912 USA. Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA. RP Ben-Naim, E (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM ebn@lanl.gov; benjamin_machta@brown.edu; machta@physics.umass.edu RI Machta, Jonathan/A-9472-2009; Ben-Naim, Eli/C-7542-2009 OI Ben-Naim, Eli/0000-0002-2444-7304 NR 55 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 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD AUG PY 2005 VL 72 IS 2 AR 021302 DI 10.1103/PhysRevE.72.021302 PN 1 PG 10 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 960BA UT WOS:000231564000018 ER PT J AU Cao, HB Wang, CZ Ho, KM AF Cao, HB Wang, CZ Ho, KM TI Fast method for estimating the energy distribution of globular states of proteins SO PHYSICAL REVIEW E LA English DT Article ID STATISTICAL-MECHANICS; STRUCTURE PREDICTION; SEQUENCE; COPOLYMERS; MODEL AB By an enumeration study, we show that the energy distributions of a lattice protein sequence on all possible compact lattice configurations can be approximated by the energy distribution of shuffled sequences on a given lattice structure. We also show that the random energy model (REM) gives a good analytical approximation for the energy distribution of shuffled sequences on lattice structures. For real proteins, when a gapped threading method is used, REM calculations systematically underestimate the mean value of the energy distributions. We found that this discrepancy can be roughly compensated by a linear correction obtained from empirical fits. This result can be used to greatly reduce the computational effort in protein threading calculations. C1 Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. Iowa State Univ, Ames Lab, USDOE, Ames, IA 50011 USA. RP Cao, HB (reprint author), Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. NR 25 TC 0 Z9 0 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD AUG PY 2005 VL 72 IS 2 AR 021907 DI 10.1103/PhysRevE.72.021907 PN 1 PG 5 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 960BA UT WOS:000231564000071 ER PT J AU Hartemann, FV Gibson, DJ Kerman, AK AF Hartemann, FV Gibson, DJ Kerman, AK TI Classical theory of Compton scattering: Assessing the validity of the Dirac-Lorentz equation SO PHYSICAL REVIEW E LA English DT Article ID DEGREES THOMSON SCATTERING; X-RAY SOURCE; SHORT-PULSE; RELATIVISTIC ELECTRONS; RADIATION REACTION; CHARGED-PARTICLES; RETARDED FIELDS; LASER-PULSES; ELECTRODYNAMICS; BEAMS AB The Dirac-Lorentz equation describes the dynamics of a classical point charge in an electromagnetic field, accounting for radiative effects in a manifestly covariant and gauge-invariant manner. The validity of this equation is assessed by direct comparison between the Dirac-Lorentz dynamics of an electron subjected to a plane wave in vacuum and the well-known recoil associated with Compton scattering. In the small recoil limit, the classical Dirac-Lorentz is shown to yield the correct momentum transfer. For larger values of the recoil, the quantum scale appears explicitly, and the classical Dirac-Lorentz equation does not properly model this situation, as shown by deriving an exact analytical solution for a monochromatic plane wave of wave number k(0) to any order in k(0)r(0), where r(0) is the classical electron radius. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. MIT, Cambridge, MA 02139 USA. RP Hartemann, FV (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 49 TC 16 Z9 17 U1 0 U2 7 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD AUG PY 2005 VL 72 IS 2 AR 026502 DI 10.1103/PhysRevE.72.026502 PN 2 PG 9 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 960BB UT WOS:000231564100105 PM 16196728 ER PT J AU Lages, J Dobrovitski, VV Katsnelson, MI De Raedt, HA Harmon, BN AF Lages, J Dobrovitski, VV Katsnelson, MI De Raedt, HA Harmon, BN TI Decoherence by a chaotic many-spin bath SO PHYSICAL REVIEW E LA English DT Article ID QUANTUM CHAOS; SYSTEMS; DECAY AB We numerically investigate decoherence of a two-spin system (central system) by a bath of many spins 1/2. By carefully adjusting parameters, the dynamical regime of the bath has been varied from quantum chaos to regular, while all other dynamical characteristics have been kept practically intact. We explicitly demonstrate that for a many-body quantum bath, the onset of quantum chaos leads to significantly faster and stronger decoherence compared to an equivalent nonchaotic bath. Moreover, the nondiagonal elements of the system's density matrix, the linear entropy, and the fidelity of the central system decay differently for chaotic and nonchaotic baths. Therefore, knowledge of the basic parameters of the bath (strength of the system-bath interaction, and the bath's spectral density of states) is not always sufficient, and much finer details of the bath's dynamics can strongly affect the decoherence process. C1 Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Dept Phys & Astron, Ames, IA 50011 USA. Radboud Univ Nijmegen, Inst Mol & Mat, NL-6525 ED Nijmegen, Netherlands. Univ Groningen, Ctr Mat Sci, Dept Appl Phys, NL-9747 AG Groningen, Netherlands. RP Lages, J (reprint author), Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. RI Katsnelson, Mikhail/D-4359-2012; Lages, Jose/D-6660-2013; OI Lages, Jose/0000-0001-5965-8876; De Raedt, Hans/0000-0001-8461-4015 NR 40 TC 42 Z9 42 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD AUG PY 2005 VL 72 IS 2 AR 026225 DI 10.1103/PhysRevE.72.026225 PN 2 PG 10 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 960BB UT WOS:000231564100079 PM 16196702 ER PT J AU Maniadis, P Kalosakas, G Rasmussen, KO Bishop, AR AF Maniadis, P Kalosakas, G Rasmussen, KO Bishop, AR TI ac conductivity in a DNA charge transport model SO PHYSICAL REVIEW E LA English DT Article ID ELECTRON-TRANSFER; DOUBLE HELIX; DISORDERED DNA; TRANSCRIPTION; FLUCTUATIONS; MOLECULES AB We present the ac response of a DNA charge transport model, where the charge in the pi-stack interacts with the base-pair opening dynamics of the double strand. The calculated ac conductivity exhibits prominent peaks at polaron normal modes with electronic character, while weaker response appears at lower frequencies in the vibrational part of the polaron normal mode spectrum. Examples of the former, strong peaks, show redshifts as the amplitude of the ac field increases. C1 Max Planck Inst Phys Complex Syst, D-01187 Dresden, Germany. Los Alamos Natl Lab, Theoret Div, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. RP Maniadis, P (reprint author), Max Planck Inst Phys Complex Syst, Nothnitzer Str 38, D-01187 Dresden, Germany. RI Rasmussen, Kim/B-5464-2009; Maniadis, Panagiotis/A-7861-2012; Kalosakas, George/L-6211-2013 OI Rasmussen, Kim/0000-0002-4029-4723; Kalosakas, George/0000-0001-7763-718X NR 31 TC 20 Z9 21 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD AUG PY 2005 VL 72 IS 2 AR 021912 DI 10.1103/PhysRevE.72.021912 PN 1 PG 4 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 960BA UT WOS:000231564000076 PM 16196609 ER PT J AU Peleg, A Dohnal, T Chung, Y AF Peleg, A Dohnal, T Chung, Y TI Effects of dissipative disorder on front formation in pattern forming systems SO PHYSICAL REVIEW E LA English DT Article ID GINZBURG-LANDAU-EQUATION; SOLITON-SOLUTIONS; WAVE SOLUTIONS; MEDIA; STABILITY; PULSES; NOISE AB We study the effects of weak disorder in the linear gain coefficient on front formation in pattern forming systems described by the cubic-quintic nonlinear Schrodinger equation. We calculate the statistics of the front amplitude and position. We show that the distribution of the front amplitude has a loglognormal diverging form at the maximum possible amplitude and that the distribution of the front position has a lognormal tail. The theory is in good agreement with our numerical simulations. We show that these results are valid for other types of dissipative disorder and relate the loglognormal divergence of the amplitude distribution to the form of the emerging front tail. C1 Univ Arizona, Dept Math, Tucson, AZ 85721 USA. LANL, Theoret Div, Los Alamos, NM 87545 USA. Univ New Mexico, Dept Math & Stat, Albuquerque, NM 87131 USA. RP Peleg, A (reprint author), Univ Arizona, Dept Math, Tucson, AZ 85721 USA. NR 27 TC 2 Z9 2 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD AUG PY 2005 VL 72 IS 2 AR 027203 DI 10.1103/PhysRevE.72.027203 PN 2 PG 4 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 960BB UT WOS:000231564100134 PM 16196757 ER PT J AU Rybin, AV Vadeiko, IP Bishop, AR AF Rybin, AV Vadeiko, IP Bishop, AR TI Theory of slow-light solitons SO PHYSICAL REVIEW E LA English DT Article ID ELECTROMAGNETICALLY INDUCED TRANSPARENCY; ATOMIC MEDIUM; PULSES; SYSTEM; PROPAGATION; STORAGE; VAPOR; GAS AB In the framework of the nonlinear Lambda model we investigate propagation of solitons in atomic vapors and Bose-Einstein condensates. We show how the complicated nonlinear interplay between fast solitons and slow-light solitons in the Lambda-type media points to the possibility to create optical gates and, thus, to control the optical transparency of the Lambda-type media. We provide an exact analytic description of decelerating, stopping and reaccelerating of slow-light solitons in atomic media in the nonadiabatic regime. Dynamical control over slow-light solitons is realized via a controlling field generated by an auxiliary laser. For a rather general time dependence of the field; we find the dynamics of the slow-light soliton inside the medium. We provide an analytical description for the nonlinear dependence of the velocity of the signal on the controlling field. If the background field is turned off at some moment of time, the signal stops. We find the location and shape of the spatially localized memory bit imprinted into the medium. We discuss physically interesting features of our solution, which are in a good agreement with recent experiments. C1 Univ Jyvaskyla, Dept Phys, FIN-40351 Jyvaskyla, Finland. Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. RP Rybin, AV (reprint author), Univ Jyvaskyla, Dept Phys, POB 35, FIN-40351 Jyvaskyla, Finland. EM andrei.rybin@phys.jyu.fi; iv3@st-andrews.ac.uk; arb@lanl.gov NR 31 TC 21 Z9 21 U1 3 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD AUG PY 2005 VL 72 IS 2 AR 026613 DI 10.1103/PhysRevE.72.026613 PN 2 PG 13 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 960BB UT WOS:000231564100118 PM 16196741 ER PT J AU Stygar, WA Cuneo, ME Vesey, RA Ives, HC Mazarakis, MG Chandler, GA Fehl, DL Leeper, RJ Matzen, MK McDaniel, DH McGurn, JS McKenney, JL Muron, DJ Olson, CL Porter, JL Ramirez, JJ Seamen, JF Speas, CS Spielman, RB Struve, KW Torres, JA Waisman, EM Wagoner, TC Gilliland, TL AF Stygar, WA Cuneo, ME Vesey, RA Ives, HC Mazarakis, MG Chandler, GA Fehl, DL Leeper, RJ Matzen, MK McDaniel, DH McGurn, JS McKenney, JL Muron, DJ Olson, CL Porter, JL Ramirez, JJ Seamen, JF Speas, CS Spielman, RB Struve, KW Torres, JA Waisman, EM Wagoner, TC Gilliland, TL TI Theoretical z-pinch scaling relations for thermonuclear-fusion experiments SO PHYSICAL REVIEW E LA English DT Article ID ARRAY Z-PINCHES; RAYLEIGH-TAYLOR INSTABILITY; X-RAY POWER; WIRE-NUMBER; DRIVEN HOHLRAUMS; PLASMA FORMATION; NUMERICAL-SIMULATION; CAPSULE IMPLOSIONS; RADIATION SYMMETRY; ENERGY AB We have developed wire-array z-pinch scaling relations for plasma-physics and inertial-confinement-fusion (ICF) experiments. The relations can be applied to the design of z-pinch accelerators for high-fusion-yield (similar to 0.4 GJ/shot) and inertial-fusion-energy (similar to 3 GJ/shot) research. We find that (delta(a)/delta(RT))proportional to(m/center dot)(1/4)(R Gamma)(-1/2), where delta(a) is the imploding-sheath thickness of a wire-ablation-dominated pinch, delta(RT) is the sheath thickness of a Rayleigh-Taylor-dominated pinch, m is the total wire-array mass, center dot is the axial length of the array, R is the initial array radius, and Gamma is a dimensionless functional of the shape of the current pulse that drives the pinch implosion. When the product R Gamma is held constant the sheath thickness is, at sufficiently large values of m/center dot, determined primarily by wire ablation. For an ablation-dominated pinch, we estimate that the peak radiated x-ray power P(r)proportional to(I/tau(i))R-3/2 center dot Phi Gamma, where I is the peak pinch current, tau(i) is the pinch implosion time, and Phi is a dimensionless functional of the current-pulse shape. This scaling relation is consistent with experiment when 13 MA <= I <= 20 MA, 93 ns <=tau(i)<= 169 ns, 10 mm <= R <= 20 mm, 10 mm <=center dot <= 20 mm, and 2.0 mg/cm <= m/center dot <= 7.3 mg/cm. Assuming an ablation-dominated pinch and that R center dot Phi Gamma is held constant, we find that the x-ray-power efficiency eta(x)equivalent to P-r/P-a of a coupled pinch-accelerator system is proportional to (tau(i)P(r)(7/9))(-1), where P-a is the peak accelerator power. The pinch current and accelerator power required to achieve a given value of P-r are proportional to tau(i), and the requisite accelerator energy E-a is proportional to tau(i)(2). These results suggest that the performance of an ablation-dominated pinch, and the efficiency of a coupled pinch-accelerator system, can be improved substantially by decreasing the implosion time tau(i). For an accelerator coupled to a double-pinch-driven hohlraum that drives the implosion of an ICF fuel capsule, we find that the accelerator power and energy required to achieve high-yield fusion scale as tau(i)(0.36) and tau(i)(1.36), respectively. Thus the accelerator requirements decrease as the implosion time is decreased. However, the x-ray-power and thermonuclear-yield efficiencies of such a coupled system increase with tau(i). We also find that increasing the anode-cathode gap of the pinch from 2 to 4 mm increases the requisite values of P-a and E-a by as much as a factor of 2. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Ktech Corp Inc, Albuquerque, NM 87123 USA. RP Stygar, WA (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 93 TC 41 Z9 42 U1 0 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD AUG PY 2005 VL 72 IS 2 AR 026404 DI 10.1103/PhysRevE.72.026404 PN 2 PG 21 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 960BB UT WOS:000231564100092 PM 16196715 ER PT J AU Tartakovsky, A Meakin, P AF Tartakovsky, A Meakin, P TI Modeling of surface tension and contact angles with smoothed particle hydrodynamics SO PHYSICAL REVIEW E LA English DT Article ID FRACTURED POROUS-MEDIA; LATTICE-BOLTZMANN; CAPILLARY RISE; HETEROGENEOUS SURFACE; APPLIED MECHANICS; DYNAMICS; FLOWS; INTERFACE; HYSTERESIS; THRESHOLD AB A two-dimensional numerical model based on smoothed particle hydrodynamics (SPH) was used to simulate unsaturated (multiphase) flow through fracture junctions. A combination of standard SPH equations with pairwise fluid-fluid and fluid-solid particle-particle interactions allowed surface tension and three-phase contact dynamics to be simulated. The model was validated by calculating the surface tension in four different ways: (i) from small-amplitude oscillations of fluid drops, (ii) from the dependence of the capillary pressure on drop radius, (iii) from capillary rise simulations, and (iv) from the behavior of a fluid drop confined between parallel walls under the influence of gravity. All four simulations led to consistent values for the surface tension. The dependence of receding and advancing contact angles on droplet velocity was studied. Incorporation of surface tension and fluid-solid interactions allowed unsaturated flow through fracture junctions to be realistically simulated, and the simulation results compare well with the laboratory experiments of Dragila and Weisbrod. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA. RP Tartakovsky, A (reprint author), Pacific NW Natl Lab, POB 999,MS K1-85, Richland, WA 99352 USA. EM Alexandre.Tartakovsky@pnl.gov NR 40 TC 91 Z9 100 U1 3 U2 65 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD AUG PY 2005 VL 72 IS 2 AR 026301 DI 10.1103/PhysRevE.72.026301 PN 2 PG 9 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 960BB UT WOS:000231564100082 PM 16196705 ER PT J AU Zaslavsky, GM Carreras, BA Lynch, VE Garcia, L Edelman, M AF Zaslavsky, GM Carreras, BA Lynch, VE Garcia, L Edelman, M TI Topological instability along invariant surfaces and pseudochaotic transport SO PHYSICAL REVIEW E LA English DT Article ID MAGNETIC FIELD IRREGULARITIES; FRACTIONAL KINETICS; DYNAMICS; DESTRUCTION; BILLIARDS; TOKAMAKS; ENTROPY; SYSTEMS AB The paper describes the complex topological structure of invariant surfaces that appears in a quasistationary regime of the tokamak plasma, and it considers in detail anomalous transport of particles along the invariant surfaces (isosurfaces) that have topological genus greater than 1. Such dynamics is pseudochaotic; i.e. it has a zero Lyapunov exponent. Simulations discover such surfaces in confined plasmas under a fairly low ratio of pressure to the magnetic field energy (beta). The isosurfaces correspond to quasicoherent structures called "streamers," and the streamers are connected by filaments. We study distribution of time of particle separation, Poincare recurrences of trajectories, and first time arrival to the system's edge. A model of a multibar-in-square billiard, introduced by Carreras [Chaos 13, 1175 (2003)] is studied with renormalization group method to obtain a distribution of the first time of particles arrival to the edge as a function of the number of bars, which appears to be power-like. The characteristic exponent of this distribution is discussed with respect to its dependence on the number of filaments that connect adjacent streamers. C1 NYU, Courant Inst Math Sci, New York, NY 10012 USA. NYU, Dept Phys, New York, NY 10003 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Carlos III Madrid, Madrid 28911, Spain. RP Zaslavsky, GM (reprint author), NYU, Courant Inst Math Sci, 251 Mercer St, New York, NY 10012 USA. RI Lynch, Vickie/J-4647-2012; Garcia, Luis/A-5344-2015 OI Lynch, Vickie/0000-0002-5836-7636; Garcia, Luis/0000-0002-0492-7466 NR 40 TC 6 Z9 6 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD AUG PY 2005 VL 72 IS 2 AR 026227 DI 10.1103/PhysRevE.72.026227 PN 2 PG 11 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 960BB UT WOS:000231564100081 PM 16196704 ER PT J AU Kubo, K Mtingwa, SK Wolski, A AF Kubo, K Mtingwa, SK Wolski, A TI Intrabeam scattering formulas for high energy beams SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB We derive completely integrated formulas for emittance growth times due to intrabeam scattering for charged particle beams in the high energy limit, including the effect of lattice parameters that vary around the accelerator ring. Using accelerator lattices for the prototype damping ring called the Accelerator Test Facility at KEK and those for two proposed International Linear Collider damping rings, we compare our results with other calculations. C1 N Carolina Agr & Tech State Univ, Greensboro, NC 27411 USA. KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki, Japan. Harvard Univ, Cambridge, MA 02138 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Mtingwa, SK (reprint author), N Carolina Agr & Tech State Univ, Greensboro, NC 27411 USA. NR 18 TC 11 Z9 11 U1 3 U2 4 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD AUG PY 2005 VL 8 IS 8 AR 081001 DI 10.1103/PhysRevSTAB.8.081001 PG 8 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 960BQ UT WOS:000231565600005 ER PT J AU Luo, Y Bai, M Pilat, F Satogata, T Trbojevic, D AF Luo, Y Bai, M Pilat, F Satogata, T Trbojevic, D TI Measurement of IR optics with linear coupling's action-angle parametrization SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB Linear coupling's action-angle parametrization is convenient for interpretation of turn-by-turn beam position monitor (BPM) data. We demonstrate how to apply this parametrization to extract Twiss and coupling parameters in interaction regions (IRs), using BPMs on each side of a long IR drift region. Example data were acquired at the Relativistic Heavy Ion Collider, using an ac dipole to excite a single transverse eigenmode. We have measured the waist of the beta function and its Twiss and coupling parameters. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Luo, Y (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM yluo@bnl.gov NR 17 TC 3 Z9 3 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD AUG PY 2005 VL 8 IS 8 AR 084001 DI 10.1103/PhysRevSTAB.8.084001 PG 6 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 960BQ UT WOS:000231565600006 ER PT J AU Russell, SJ Wang, ZF Haynes, WB Wheat, RM Carlsten, BE Earley, LM Humphries, S Ferguson, P AF Russell, SJ Wang, ZF Haynes, WB Wheat, RM Carlsten, BE Earley, LM Humphries, S Ferguson, P TI First observation of elliptical sheet beam formation with an asymmetric solenoid lens SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB Currently ongoing at Los Alamos National Laboratory is a program to develop high-power, planar 100 300 GHz traveling-wave tubes. A necessary part of this effort is a sheet electron beam source. Previously, we have described a novel asymmetric solenoid lens concept for transforming the circular beam from a high-perveance electron gun to a planar configuration. The lens is a standard electromagnetic solenoid with elliptical, instead of circular, pole apertures. The elliptical pole openings result in asymmetric focusing, which in turn forms an elliptical sheet beam suitable for our planar structures. Here we report the first experimental demonstration of this lens. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Field Precis, Albuquerque, NM USA. MDS Co, Oakland, CA USA. RP Russell, SJ (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. OI Russo, Stefano/0000-0002-8747-3446 NR 7 TC 33 Z9 36 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD AUG PY 2005 VL 8 IS 8 AR 080401 DI 10.1103/PhysRevSTAB.8.080401 PG 8 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 960BQ UT WOS:000231565600001 ER PT J AU Li, H Li, LY Strachan, DM AF Li, H Li, LY Strachan, DM TI Structural aspects of Judd-Ofelt oscillator strength parameters: relationship between Nd dissolution and its local environments in borosilicate glasess SO PHYSICS AND CHEMISTRY OF GLASSES LA English DT Article; Proceedings Paper CT 9th International Conference on the Structure of Non-Crystalline Materials (NCM9) CY JUL 11-15, 2004 CL Alfred Univ, Corning, NY HO Alfred Univ ID SODIUM-ALUMINOBOROSILICATE GLASSES; RADIATIVE TRANSITION-PROBABILITIES; NUCLEAR-MAGNETIC-RESONANCE; RARE-EARTH IONS; PHOSPHATE-GLASSES; SILICATE-GLASSES; TRIVALENT NEODYMIUM; OPTICAL-PROPERTIES; OXIDE GLASSES; GADOLINIUM AB Judd-Ofelt (JO) theory derived oscillator strength parameters (Omega(2), Omega(4), Omega(6)) of electronic transitions of the trivalent lanthanides (Ln) qualitatively describe the local Ln environment. Recently, we have systematically studied the JO parameters as a function of Nd concentration in a single Na-rich aluminoborosilicate glass. Based on Nd partitioning scheme as its dissolution mechanism for borosilicate glasses, we simulated the extent of borate saturation by Nd as a function of Nd concentration using a stable local Nd-metaborate structure derived from our previous studies. The best results indicated that the first onset of the Omega(2) discontinuity resultedfrom the saturation of the borate sites by Nd. Combining with our earlier study of the JO parameters for an Al-rich borosilicate glass without Na, we further conclude that the index of saturation of boron by Nd, IS[B]=[Nd2O3](B-site)/1/3{[B2O3](ex)+[Al2O3](ex)}, provides a general physical description of Nd partitioning in the borate sites for complex Na2O-Al2O3-B2O3-SiO2 glasses, whereas for the Na-rich glass reported in this study, [Al2O3](ex)=0. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Li, H (reprint author), PPG Ind Inc, Glass Technol Ctr, Fundamental Sci, Fibre Glass Sci & Technol, POB 11310, Pittsburgh, PA 15230 USA. NR 37 TC 3 Z9 3 U1 0 U2 2 PU SOC GLASS TECHNOLOGY PI SHEFFIELD PA THORNTON 20 HALLAM GATE ROAD, SHEFFIELD S10 5BT, S YORKSHIRE, ENGLAND SN 0031-9090 J9 PHYS CHEM GLASSES JI Phys. Chem. Glasses PD AUG PY 2005 VL 46 IS 4 BP 412 EP 419 PG 8 WC Chemistry, Physical; Materials Science, Ceramics SC Chemistry; Materials Science GA 002FQ UT WOS:000234597300021 ER PT J AU Corrales, LR Du, JC AF Corrales, LR Du, JC TI Thermal kinetics of glass simulations SO PHYSICS AND CHEMISTRY OF GLASSES LA English DT Article; Proceedings Paper CT 9th International Conference on the Structure of Non-Crystalline Materials (NCM9) CY JUL 11-15, 2004 CL Alfred Univ, Corning, NY HO Alfred Univ ID MOLECULAR-DYNAMICS SIMULATIONS; SILICATE-GLASSES; TEMPERATURE AB A novel glass quenching method along with traditional glass quenching methods are used to create simulated silica glass, and their affect on the final glass structure is determined. The most distinct changes are seen to occur in the medium range structure, specifically in the population of the different ring sizes. Some differences in the number of defects formed are also observed. The implications are that the modified glass forming method creates glasses that are at least as good as traditional simulated glass forming methods. The objective of this work is to validate the new glass forming algorithm that can be used in a systematic study of thermal dissipation in simulated systems to better understand the role of simulated quenching algorithms in controlling structural results. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Corrales, LR (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM rene.corrales@pnl.gov NR 14 TC 18 Z9 18 U1 0 U2 4 PU SOC GLASS TECHNOLOGY PI SHEFFIELD PA THORNTON 20 HALLAM GATE ROAD, SHEFFIELD S10 5BT, S YORKSHIRE, ENGLAND SN 0031-9090 J9 PHYS CHEM GLASSES JI Phys. Chem. Glasses PD AUG PY 2005 VL 46 IS 4 BP 420 EP 424 PG 5 WC Chemistry, Physical; Materials Science, Ceramics SC Chemistry; Materials Science GA 002FQ UT WOS:000234597300022 ER PT J AU Mei, Q Teredesai, PV Benmore, CJ Sampath, S Yarger, JL Bychkov, E Neuefeind, J Lienenweber, K AF Mei, Q Teredesai, PV Benmore, CJ Sampath, S Yarger, JL Bychkov, E Neuefeind, J Lienenweber, K TI The structure of permanently densified GeSe2 glasses SO PHYSICS AND CHEMISTRY OF GLASSES LA English DT Article; Proceedings Paper CT 9th International Conference on the Structure of Non-Crystalline Materials (NCM9) CY JUL 11-15, 2004 CL Alfred Univ, Corning, NY HO Alfred Univ ID INTERMEDIATE-RANGE ORDER; HIGH-PRESSURE; LIQUID GESE2; DIFFRACTION; MOLTEN AB GeSe2 is an archetypal tetrahedral glass that differs from both vitreous silica and germania in that it forms a network of both edge and corner sharing tetrahedra with a substantial number of homopolar bonds at normal pressure. A combination of high energy diffraction measurements and Raman spectroscopy have been performed on glassy GeSe2 samples with densities of 3 and 4% greater than the normal glass. The samples were pressurised in a multi-anvil cell and recovered to ambient pressure for the experiments. The higher density samples show a dramatic decrease in the first sharp diffraction peak height and shift to higher Q-values on densification. This is related to a breakdown of intermediate range order arising from the Ge-Ge interactions. X-ray difference functions suggest there is an increase in Ge-Ge corner sharing tetrahedra for the 4% denser glass compared to the normal glass. The Raman data also show a decrease in ratio of edge sharing.-corner sharing tetrahedra indicating a change in the distribution of large ring structures that form the glassy network. C1 Univ Wyoming, Dept Chem, Laramie, WY 82071 USA. Argonne Natl Lab, IPNS, Argonne, IL 60439 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. Univ Littoral, LPCA, CNRS, UMR 8101, F-59140 Dunkerque, France. Arizona State Univ, Dept Chem & Biochem, Tempe, AZ 85287 USA. RP Benmore, CJ (reprint author), Univ Wyoming, Dept Chem, Laramie, WY 82071 USA. EM benmore@anl.gov RI Neuefeind, Joerg/D-9990-2015; Yarger, Jeff/L-8748-2014 OI Neuefeind, Joerg/0000-0002-0563-1544; Yarger, Jeff/0000-0002-7385-5400 NR 19 TC 6 Z9 6 U1 0 U2 1 PU SOC GLASS TECHNOLOGY PI SHEFFIELD PA THORNTON 20 HALLAM GATE ROAD, SHEFFIELD S10 5BT, S YORKSHIRE, ENGLAND SN 0031-9090 J9 PHYS CHEM GLASSES JI Phys. Chem. Glasses PD AUG PY 2005 VL 46 IS 4 BP 483 EP 486 PG 4 WC Chemistry, Physical; Materials Science, Ceramics SC Chemistry; Materials Science GA 002FQ UT WOS:000234597300033 ER PT J AU Weber, JKR Rix, JE Hiera, KJ Tangeman, JA Benmore, CJ Hart, RT Siewenie, JE Santodonato, LJ AF Weber, JKR Rix, JE Hiera, KJ Tangeman, JA Benmore, CJ Hart, RT Siewenie, JE Santodonato, LJ TI Neutron diffraction from levitated liquids - a technique for measurements under extreme conditions SO PHYSICS AND CHEMISTRY OF GLASSES LA English DT Article; Proceedings Paper CT 9th International Conference on the Structure of Non-Crystalline Materials (NCM9) CY JUL 11-15, 2004 CL Alfred Univ, Corning, NY HO Alfred Univ ID HIGH-TEMPERATURE; SYNCHROTRON-RADIATION; PHASE-TRANSFORMATION; UNDOPED ZIRCONIA; GLASSES; ALUMINA AB A miniature aerodynamic levitation device was integrated with CO2 laser beam heating and a pulsed neutron source. Liquid and solid oxide samples were studied at temperatures from 300-3300 K The total neutron structure factors, S-N(Q), were obtained for 64:36 mololo CaO:Al2O3- composition liquid at ca. 2000 K, YAG at 300-2300 K and ZrO2 at 300-3300 K The pair distribution functions were derived from S(Q). In the CA liquid, the Al and Ca ions were in higher coordination with oxygen than in the corresponding glasses. The thermal expansion coefficient of crystalline YAG was calculated to be 10 X 10(-6) /K in the temperature interval 300-1800 K from refined data. The average metal ion coordination in YAG composition glass was lower than in the equilibrium crystalline YAG phase. The garnet phase was stable to a temperature of at least 1800 K and marked diffrences in connectivity and coordination were observed between a YAG-composition glass and the hot crystalline solid. The ZrO2 showed three crystalline polymorphs when it was heated. The density of the ZrO2 solid increased at ca. 3000 K, slightly below the melting point. C1 Containerless Res Inc, Evanston, IL 60201 USA. Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA. Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37830 USA. RP Weber, JKR (reprint author), Containerless Res Inc, Evanston, IL 60201 USA. EM weber@containerless.com OI Benmore, Chris/0000-0001-7007-7749 NR 22 TC 4 Z9 4 U1 0 U2 7 PU SOC GLASS TECHNOLOGY PI SHEFFIELD PA THORNTON 20 HALLAM GATE ROAD, SHEFFIELD S10 5BT, S YORKSHIRE, ENGLAND SN 0031-9090 J9 PHYS CHEM GLASSES JI Phys. Chem. Glasses PD AUG PY 2005 VL 46 IS 4 BP 487 EP 491 PG 5 WC Chemistry, Physical; Materials Science, Ceramics SC Chemistry; Materials Science GA 002FQ UT WOS:000234597300034 ER PT J AU Levitas, VI Preston, DL AF Levitas, VI Preston, DL TI Thermomechanical lattice instability and phase field theory of martensitic phase transformations, twinning and dislocations at large strains SO PHYSICS LETTERS A LA English DT Article ID MOLECULAR-DYNAMICS; CRYSTALS; METALS; MODEL AB Using the second law of thermodynamics, a criterion for the instability of a crystal lattice with respect to a change in order parameters is derived for finite strains and lattice rotations. An explicit relation for lattice rotation is derived. A Gibbs (Landau) potential describing martensitic phase transformations, twinning, and dislocation nucleation is derived for a prescribed nonsymmetric nominal stress tensor and small elastic strain, but finite transformation strain and rotations. The equilibrium and transformation conditions are obtained. Martensitic phase transformations in NiAl, BN and C are analyzed and the importance of finite-strain corrections is demonstrated. (c) 2005 Elsevier B.V. All rights reserved. C1 Texas Tech Univ, Ctr Mechanochem & Synth New Mat, Dept Mech Engn, Lubbock, TX 79409 USA. Los Alamos Natl Lab, Phys Div, Los Alamos, NM 87545 USA. RP Levitas, VI (reprint author), Texas Tech Univ, Ctr Mechanochem & Synth New Mat, Dept Mech Engn, Lubbock, TX 79409 USA. EM valery.levitas@ttu.edu NR 24 TC 21 Z9 21 U1 1 U2 14 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 AUG 1 PY 2005 VL 343 IS 1-3 BP 32 EP 39 DI 10.1016/j.physleta.2005.05.034 PG 8 WC Physics, Multidisciplinary SC Physics GA 946QH UT WOS:000230586700006 ER PT J AU Cheng, BL Glimm, J Sharp, DH Yu, Y AF Cheng, BL Glimm, J Sharp, DH Yu, Y TI A multiphase flow model for the unstable mixing of incompressible layered materials SO PHYSICS OF FLUIDS LA English DT Article ID RAYLEIGH-TAYLOR INSTABILITY; INERTIAL-CONFINEMENT-FUSION; 2-PHASE FLOW; DEPENDENCE; INTERFACES; FLUIDS; WAVES AB In this paper, a model for the unstable mixing of n parallel or concentric incompressible fluid layers is proposed. The approach in constructing this model is pairwise, based on a known two-incompressible-fluid mixing model. The problem complexity increases significantly in going from two to three fluids, but the increase in complexity is relatively small thereafter. We present a detailed study of the n=3 problem, which displays all of the difficult modeling issues applicable to arbitrary n >= 3 while still being reasonably tractable. (c) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Div Appl Phys, Los Alamos, NM 87545 USA. SUNY Stony Brook, Dept Appl Math & Stat, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Ctr Comp Sci, Upton, NY 11793 USA. Los Alamos Natl Lab, Div Theoret, Div Appl Phys, Los Alamos, NM 87545 USA. RP Cheng, BL (reprint author), Los Alamos Natl Lab, Div Appl Phys, POB 1663, Los Alamos, NM 87545 USA. EM bcheng@lanl.gov NR 21 TC 2 Z9 2 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-6631 J9 PHYS FLUIDS JI Phys. Fluids PD AUG PY 2005 VL 17 IS 8 AR 087102 DI 10.1063/1.2001007 PG 8 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA 957RW UT WOS:000231392000037 ER PT J AU Kumar, S Orlicz, G Tomkins, C Goodenough, C Prestridge, K Vorobieff, P Benjamin, R AF Kumar, S Orlicz, G Tomkins, C Goodenough, C Prestridge, K Vorobieff, P Benjamin, R TI Stretching of material lines in shock-accelerated gaseous flows SO PHYSICS OF FLUIDS LA English DT Article ID RICHTMYER-MESHKOV INSTABILITY; THIN FLUID LAYER; LAGRANGIAN COHERENT STRUCTURES; UNSTABLE GAS-CYLINDERS; CHAOTIC FLOWS; MATERIAL-SURFACES; RAYLEIGH-TAYLOR; GROWTH; PROPAGATION; INTERFACES AB A Mach 1.2 planar shock wave impulsively accelerates one of five different configurations of heavy-gas (SF6) cylinders surrounded by lighter gas (air), producing one or more pairs of interacting vortex columns. The interaction of the columns is investigated with planar laser-induced fluorescence in the plane normal to the axes of the cylinders. For the first time, we experimentally measure the early time stretching rate (in the first 220 mu s after shock interaction before the development of secondary instabilities) of material lines in shock-accelerated gaseous flows resulting from the Richtmyer-Meshkov instability at Reynolds number similar to 25 000 and Schmidt number similar to 1. The early time specific stretching rate exponent associated with the stretching of material lines is measured in these five configurations and compared with the numerical computations of Yang [AIAA J. 31, 854 (1993)] in some similar configurations and time range. The stretching rate is found to depend on the configuration and orientation of the gaseous cylinders, as these affect the refraction of the shock and thus vorticity deposition. Integral scale measurements fail to discriminate between the various configurations over the same time range, however, suggesting that integral measures are insufficient to characterize early time mixing in these flows. (c) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA. Univ New Mexico, Dept Mech Engn, Albuquerque, NM 87131 USA. RP Kumar, S (reprint author), Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA. RI Vorobieff, Peter/B-3376-2011; Prestridge, Kathy/C-1137-2012; OI Prestridge, Kathy/0000-0003-2425-5086; Vorobieff, Peter/0000-0003-0631-7263 NR 56 TC 20 Z9 26 U1 3 U2 7 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-6631 J9 PHYS FLUIDS JI Phys. Fluids PD AUG PY 2005 VL 17 IS 8 AR 082107 DI 10.1063/1.2031347 PG 11 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA 957RW UT WOS:000231392000013 ER PT J AU Livescu, D AF Livescu, D TI Reply to "response to 'comment on "compressible Rayleigh-Taylor instabilities in supernova remnants"'" [Phys. Fluids 17, 069102 (2005)] SO PHYSICS OF FLUIDS LA English DT Editorial Material C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Livescu, D (reprint author), Los Alamos Natl Lab, CCS-2 MS B296, Los Alamos, NM 87545 USA. EM livescu@lanl.gov OI Livescu, Daniel/0000-0003-2367-1547 NR 6 TC 7 Z9 7 U1 0 U2 5 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-6631 J9 PHYS FLUIDS JI Phys. Fluids PD AUG PY 2005 VL 17 IS 8 AR 089101 DI 10.1063/1.2001688 PG 2 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA 957RW UT WOS:000231392000049 ER PT J AU Fu, GY Berk, HL Pletzer, A AF Fu, GY Berk, HL Pletzer, A TI Kinetic damping of toroidal Alfven eigenmodes SO PHYSICS OF PLASMAS LA English DT Article ID FUSION ALPHA-PARTICLES; EXCITATION; TOKAMAKS; PLASMAS; CASTOR; WAVES AB The damping of Toroidal Alfven Eigenmodes in Joint European Torus (JET) [P. H. Rebut and B. E. Kenn, Fusion Technol.11, 13 (1987)] plasmas is investigated by using a reduced kinetic model. Typically no significant damping is found to occur near the center of the plasma due to mode conversion to kinetic Alfven waves. In contrast, continuum damping from resonance near the plasma edge may be significant, and when it is, it gives rise to damping rates that are compatible with the experimental observations. (c) 2005 American Institute of Physics. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Inst Fus Studies, Austin, TX 78712 USA. Geophys Fluid Dynam Lab, Princeton, NJ 08540 USA. RP Fu, GY (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 16 TC 28 Z9 28 U1 1 U2 6 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD AUG PY 2005 VL 12 IS 8 AR 082505 DI 10.1063/1.1995007 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 956OX UT WOS:000231310800030 ER PT J AU Hicks, DG Boehly, TR Celliers, PM Eggert, JH Vianello, E Meyerhofer, DD Collins, GW AF Hicks, DG Boehly, TR Celliers, PM Eggert, JH Vianello, E Meyerhofer, DD Collins, GW TI Shock compression of quartz in the high-pressure fluid regime SO PHYSICS OF PLASMAS LA English DT Article ID EQUATION-OF-STATE; WAVE COMPRESSION; SOLID DEUTERIUM; DENSE MATTER; STISHOVITE; ALUMINUM; SILICA; TEMPERATURES; PHASE; SIO2 AB The Hugoniot of quartz has been measured using laser-driven shock waves with pressures from 2 to 15 Mbars. Within this pressure range silica transforms from a liquid near melt into a dense plasma. Results are in good agreement with previous studies in part of this range performed using explosive- and nuclear-driven shocks indicating the absence of time-dependent effects for time scales between several hundred picoseconds and several hundred microseconds. These data combined with earlier data at lower pressures clearly show the increasing compressibility of silica as it transitions from solid to liquid to dense plasma regimes. (c) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA. Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA. Univ Rochester, Dept Engn Mech, Rochester, NY 14627 USA. RP Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM hicks13@llnl.gov RI Collins, Gilbert/G-1009-2011; Hicks, Damien/B-5042-2015 OI Hicks, Damien/0000-0001-8322-9983 NR 46 TC 59 Z9 63 U1 1 U2 26 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 1070-664X EI 1089-7674 J9 PHYS PLASMAS JI Phys. Plasmas PD AUG PY 2005 VL 12 IS 8 AR 082702 DI 10.1063/1.2009528 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 956OX UT WOS:000231310800041 ER PT J AU Hill, JM Key, MH Hatchett, SP Freeman, RR AF Hill, JM Key, MH Hatchett, SP Freeman, RR TI Beam-Weibel filamentation instability in near-term and fast-ignition experiments SO PHYSICS OF PLASMAS LA English DT Article ID RELATIVISTIC ELECTRON-BEAMS; LASER-PLASMA INTERACTIONS; NONLINEAR DEVELOPMENT; 2-STREAM INSTABILITY; HOT-ELECTRONS; DENSITY; DRIVEN; PULSES; SIMULATION; TARGETS AB High intensity laser-plasma interactions accelerate electrons to suprathermal velocities. Their current is neutralized by an induced cold electron return current. These inter-penetrating and anti-parallel currents are subject to electrostatic and electromagnetic instability. Two analytical models for electron transport are used to predict the growth rates of the linear electromagnetic beam-Weibel filamentation instability in both near-term laser-solid experiments as well as in future fast-ignition experiments. Specifications and calculations of the relevant physical parameters are made. Both models predict that instability growth is significant for the fast-ignition case. Instability development in near-term experiments is also significant, but with a greater difference between the models' predictions at low densities. (c) 2005 American Institute of Physics. C1 Ohio State Univ, Coll Math & Phys Sci, Columbus, OH 43210 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Ohio State Univ, Coll Math & Phys Sci, Columbus, OH 43210 USA. RP Hill, JM (reprint author), Ohio State Univ, Coll Math & Phys Sci, Columbus, OH 43210 USA. EM jerhill@ieee.org; key1@llnl.gov; hatchett1@llnl.gov; freeman@mps.ohio-state.edu NR 44 TC 31 Z9 31 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD AUG PY 2005 VL 12 IS 8 AR 082304 DI 10.1063/1.1986988 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 956OX UT WOS:000231310800021 ER PT J AU Kulsrud, R Ji, H Fox, W Yamada, M AF Kulsrud, R Ji, H Fox, W Yamada, M TI An electromagnetic drift instability in the magnetic reconnection experiment and its importance for magnetic reconnection SO PHYSICS OF PLASMAS LA English DT Article AB The role which resistivity plays in breaking magnetic field lines, heating the plasma, and plasma-field slippage during magnetic reconnection is discussed. Magnetic fluctuations are observed in the MRX (magnetic reconnection experiment) [M. Yamada, H. Ji, S. Hsu, T. Carter, R. Kulsrud, N. Bertz, F. Jobes, Y. Ono, and F. Perkins, Phys. Plasmas 4, 1936 (1997)] that are believed to provide resistive friction or wave resistivity. A localized linear theory has been proposed for their origin as an obliquely propagating lower hybrid drift instability. In this paper, the linear theory of the instability is summarized, and the resulting heating and slippage are calculated from quasilinear theory. Making use of measured amplitudes of the magnetic fluctuations in the MRX, the amount of these effects is estimated. Within the experimental uncertainties they are shown to be quite important for the magnetic reconnection process. (c) 2005 American Institute of Physics. C1 Princeton Univ, Plasma Phys Lab, Ctr Magnet Self Org, Lab Astrophys Plasmas, Princeton, NJ 08543 USA. RP Kulsrud, R (reprint author), Princeton Univ, Plasma Phys Lab, Ctr Magnet Self Org, Lab Astrophys Plasmas, POB 451, Princeton, NJ 08543 USA. EM rmk@pppl.gov RI Yamada, Masaaki/D-7824-2015 OI Yamada, Masaaki/0000-0003-4996-1649 NR 17 TC 25 Z9 25 U1 0 U2 5 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD AUG PY 2005 VL 12 IS 8 AR 082301 DI 10.1063/1.1949225 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 956OX UT WOS:000231310800018 ER PT J AU Polomarov, OV Theodosiou, CE Kaganovich, ID AF Polomarov, OV Theodosiou, CE Kaganovich, ID TI Enhanced collisionless heating in a nonuniform plasma at the bounce resonance condition SO PHYSICS OF PLASMAS LA English DT Article ID GAS-DISCHARGES; REGIME AB The importance of accounting for a nonuniform density profile for modeling of collisionless electron heating in a bounded low-pressure plasma is demonstrated. A drastic enhancement of the power transfer into an inductive plasma under the condition of a bounce resonance is observed if the nonuniformity of the plasma density profile is accounted for. This enhanced plasma heating is attributed to the increase of the number of resonant electrons, for which the bounce frequency of electrons confined inside the plasma potential is equal to the rf field frequency. (c) 2005 American Institute of Physics. C1 Univ Toledo, Dept Phys & Astron, Toledo, OH 43606 USA. Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Polomarov, OV (reprint author), Univ Toledo, Dept Phys & Astron, 2801 W Bancroft St, Toledo, OH 43606 USA. NR 24 TC 21 Z9 21 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD AUG PY 2005 VL 12 IS 8 AR 080704 DI 10.1063/1.1986163 PG 4 WC Physics, Fluids & Plasmas SC Physics GA 956OX UT WOS:000231310800004 ER PT J AU Ryutov, DD Cohen, BI Cohen, RH Hooper, EB Sovinec, CR AF Ryutov, DD Cohen, BI Cohen, RH Hooper, EB Sovinec, CR TI The effect of artificial diffusivity on the flute instability SO PHYSICS OF PLASMAS LA English DT Article ID STABILITY; DIPOLE AB Sometimes, in order to improve the performance of magnetohydrodynamical codes, artificial diffusivity (D) is introduced in the mass continuity equation. In this communication, an analysis of the effect of the artificial diffusivity on the low-beta plasma stability in a simple geometry is presented. It is shown that, at low diffusivity, one recovers classical results, whereas at high diffusivity the plasma becomes more unstable. Dependence of the stability on D is suppressed if the volume of the flux tube varies insignificantly in the course of the perturbation growth. These observations may help the code developers and users to identify the regimes where the artificial diffusivity is not affecting the results (or vice versa). (c) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA. RP Ryutov, DD (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. EM ryutov1@llnl.gov NR 11 TC 7 Z9 7 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD AUG PY 2005 VL 12 IS 8 AR 084504 DI 10.1063/1.2030367 PG 4 WC Physics, Fluids & Plasmas SC Physics GA 956OX UT WOS:000231310800056 ER PT J AU Shadwick, BA Tarkenton, GM Esarey, E Schroeder, CB AF Shadwick, BA Tarkenton, GM Esarey, E Schroeder, CB TI Fluid and Vlasov models of low-temperature, collisionless, relativistic plasma interactions (vol 12, art no 056710, 2005) SO PHYSICS OF PLASMAS LA English DT Correction C1 Inst Adv Phys, Conifer, CO 80433 USA. Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Shadwick, BA (reprint author), Inst Adv Phys, Suite 199,10875 US Hwy 285, Conifer, CO 80433 USA. EM bashadwick@lbl.gov NR 1 TC 0 Z9 0 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD AUG PY 2005 VL 12 IS 8 AR 089902 DI 10.1063/1.2006689 PG 1 WC Physics, Fluids & Plasmas SC Physics GA 956OX UT WOS:000231310800063 ER PT J AU Strait, EJ Garofalo, AM Okabayashi, M AF Strait, EJ Garofalo, AM Okabayashi, M TI Comment on "The interaction of error fields and resistive wall modes" SO PHYSICS OF PLASMAS LA English DT Editorial Material ID DIII-D PLASMAS; STABILIZATION AB Experimental evidence from DIII-D shows that the resistive wall mode can be stabilized by plasma rotation, contrary to the interpretation of the data suggested by Gimblett and Hastie [Phys. Plasmas 11, 1019 (2004)]. (c) 2005 American Institute of Physics. C1 Gen Atom Co, San Diego, CA 92186 USA. Columbia Univ, New York, NY 10027 USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Strait, EJ (reprint author), Gen Atom Co, San Diego, CA 92186 USA. NR 10 TC 1 Z9 1 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD AUG PY 2005 VL 12 IS 8 AR 084701 DI 10.1063/1.1995668 PG 2 WC Physics, Fluids & Plasmas SC Physics GA 956OX UT WOS:000231310800060 ER PT J AU Takechi, M Fukuyama, A Ishikawa, M Cheng, CZ Shinohara, K Ozeki, T Kusama, Y Takeji, S Fujita, T Oikawa, T Suzuki, T Oyama, N Morioka, A Gorelenkov, NN Kramer, GJ Nazikian, R AF Takechi, M Fukuyama, A Ishikawa, M Cheng, CZ Shinohara, K Ozeki, T Kusama, Y Takeji, S Fujita, T Oikawa, T Suzuki, T Oyama, N Morioka, A Gorelenkov, NN Kramer, GJ Nazikian, R CA JT-60 Team TI Alfven eigenmodes in reversed shear plasmas in JT-60U negative-ion-based neutral beam injection discharges SO PHYSICS OF PLASMAS LA English DT Article ID AXISYMMETRICAL TOROIDAL PLASMAS; MODE-STABILITY; TOKAMAKS; DRIVEN; WAVE AB Rapid frequency sweeping modes observed in reversed magnetic shear (RS) plasmas on the Japan Atomic Energy Research Institute Tokamak 60 Upgrade (JT-60U) [H. Ninomiya and the JT-60 Team, Phys. Fluids B 4, 2070 (1992)] have been identified as reversed-shear-induced Alfven eigenmodes (RSAEs), which are ideal magnetohydrodynamic Alfven eigenmodes (AEs) localized to the region of minimum safety factor, q(min), and are excited by negative-ion-based neutral beam injection. The chirping and subsequent saturation of the mode frequency are consistent with theoretical predictions for the transition from RSAEs to toroidal Alfven eigenmodes (TAEs). The previously observed rapid frequency sweeping modes in ion cyclotron wave heated plasmas in JT-60U can also be similarly explained. The observed AE amplitude is largest during the transition from RSAEs to TAEs, and fast ion loss is observed when the AE amplitude is largest at this transition. It is preferable to operate outside the transition range of q(min), e.g., 2.4 < q(min)< 2.7 for the n=1 AE to avoid substantial fast ion loss in RS plasmas. (c) 2005 American Institute of Physics. C1 Japan Atom Energy Res Inst, Naka Fus Res Estab, Naka, Ibaraki 31101, Japan. Kyoto Univ, Dept Nucl Engn, Kyoto 6068501, Japan. Univ Tsukuba, Plant Res Ctr, Tsukuba, Ibaraki 3058877, Japan. Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Takechi, M (reprint author), Japan Atom Energy Res Inst, Naka Fus Res Estab, Naka, Ibaraki 31101, Japan. RI Cheng, Chio/K-1005-2014; Kikuchi, Mitsuru/O-1036-2015 OI Kikuchi, Mitsuru/0000-0002-5485-8737 NR 29 TC 24 Z9 25 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD AUG PY 2005 VL 12 IS 8 AR 082509 DI 10.1063/1.1938973 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 956OX UT WOS:000231310800034 ER PT J AU Ginocchio, JN AF Ginocchio, JN TI Relativistic symmetries in nuclei and hadrons SO PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS LA English DT Review DE symmetry; Dirac equation; pseudospin; nuclear and hadron spectroscopy ID HEAVY DEFORMED-NUCLEI; SURFACE DELTA INTERACTION; MAGNETIC DIPOLE OPERATOR; GAMOW-TELLER TRANSITIONS; SKYRME TYPE INTERACTIONS; PSEUDO-SPIN ALIGNMENT; HARTREE-FOCK MODELS; NEUTRON DRIP-LINE; QUANTIZED ALIGNMENT; IDENTICAL BANDS AB Relativistic symmetries of the Dirac Hamiltonian had been discovered many years ago but only recently have these symmetries been recognized empirically in nuclear and hadronic spectroscopy. The empirical data supporting spin symmetry in hadron spectroscopy and pseudospin symmetry in nuclear spectroscopy are reviewed. Realistic relativistic mean field calculations of nuclei and QCD sum rules are reviewed and shown to support approximate pseudospin symmetry. These revelations suggest a more fundamental rationale for pseudospin symmetry motivating an investigation for pseudospin conservation in the nucleon-nucleon interaction. Open questions regarding hadron spin symmetry and nuclear pseudospin symmetry are discussed. (c) 2005 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, MS B238, Los Alamos, NM 87545 USA. EM gino@lanl.gov NR 172 TC 299 Z9 307 U1 3 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-1573 EI 1873-6270 J9 PHYS REP JI Phys. Rep.-Rev. Sec. Phys. Lett. PD AUG PY 2005 VL 414 IS 4-5 BP 165 EP 261 DI 10.1016/j.physrep.2005.04.003 PG 97 WC Physics, Multidisciplinary SC Physics GA 943NK UT WOS:000230360600001 ER PT J AU Seltzer, SM Inokuti, M AF Seltzer, SM Inokuti, M TI Martin Jacob Berger SO PHYSICS TODAY LA English DT Biographical-Item C1 Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Seltzer, SM (reprint author), Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA. NR 1 TC 0 Z9 0 U1 1 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD AUG PY 2005 VL 58 IS 8 BP 67 EP 68 DI 10.1063/1.2062927 PG 2 WC Physics, Multidisciplinary SC Physics GA 951NI UT WOS:000230937000027 ER PT J AU Crease, RP AF Crease, RP TI Judging the bomb builders SO PHYSICS WORLD LA English DT Editorial Material C1 SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Crease, RP (reprint author), SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 USA. EM rcrease@notes.cc.sunysb.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8585 J9 PHYS WORLD JI Phys. World PD AUG PY 2005 VL 18 IS 8 BP 15 EP 15 PG 1 WC Physics, Multidisciplinary SC Physics GA 976JG UT WOS:000232729000018 ER PT J AU Formisano, V Angrilli, F Arnold, G Atreya, S Bianchini, G Biondi, D Blanco, A Blecka, MI Coradini, A Colangeli, L Ekonomov, A Esposito, F Fonti, S Giuranna, M Grassi, D Gnedykh, V Grigoriev, A Hansen, G Hirsh, H Khatuntsev, I Kiselev, A Ignatiev, N Jurewicz, A Lellouch, E Moreno, JL Marten, A Mattana, A Maturilli, A Mencarelli, E Michalska, M Moroz, V Moshkin, B Nespoli, F Nikolsky, Y Orfei, R Orleanski, P Orofino, V Palomba, E Patsaev, D Piccioni, G Rataj, M Rodrigo, R Rodriguez, J Rossi, M Saggin, B Titov, D Zasova, L AF Formisano, V Angrilli, F Arnold, G Atreya, S Bianchini, G Biondi, D Blanco, A Blecka, MI Coradini, A Colangeli, L Ekonomov, A Esposito, F Fonti, S Giuranna, M Grassi, D Gnedykh, V Grigoriev, A Hansen, G Hirsh, H Khatuntsev, I Kiselev, A Ignatiev, N Jurewicz, A Lellouch, E Moreno, JL Marten, A Mattana, A Maturilli, A Mencarelli, E Michalska, M Moroz, V Moshkin, B Nespoli, F Nikolsky, Y Orfei, R Orleanski, P Orofino, V Palomba, E Patsaev, D Piccioni, G Rataj, M Rodrigo, R Rodriguez, J Rossi, M Saggin, B Titov, D Zasova, L TI The Planetary Fourier Spectrometer (PFS) onboard the European Mars Express mission SO PLANETARY AND SPACE SCIENCE LA English DT Article DE instrumentation; atmosphere; Mars; Mars Express ID MARTIAN ATMOSPHERE; SURFACE AB The Planetary Fourier Spectrometer (PFS) for the Mars Express mission is an infrared spectrometer optimised for atmospheric studies. This instrument has a short wave (SW) channel that covers the spectral range from 1700 to 8200.0 cm(-1) (1.2-5.5 mu m) and a long-wave (LW) channel that covers 250-1700 cm(-1) (5.5-45 mu m). Both channels have a uniform spectral resolution of 1.3 cm(-1). The instrument field of view FOV is about 1.6 degrees (FWHM) for the Short Wavelength channel (SW) and 2.8 degrees (FWHM) for the Long Wavelength channel (LW) which corresponds to a spatial resolution of 7 and 12 km when Mars is observed from an height of 250 km. PFS can provide unique data necessary to improve our knowledge not only of the atmosphere properties but also about mineralogical composition of the surface and the surface-atmosphere interaction. The SW channel uses a PbSe detector cooled to 200-220K while the LW channel is based on a pyroelectric (LiTaO3) detector working at room temperature. The intensity of the interferogram. is measured every 150 nm of physical mirrors displacement, corresponding to 600 nm optical path difference, by using a laser diode monochromatic light interferogram (a sine wave), whose zero crossings control the double pendulum motion. PFS works primarily around the pericentre of the orbit, only occasionally observing Mars from large distances. Each measurements take 4 s, with a repetition time of 8.5 s. By working roughly 0.6 h around pericentre, a total of 330 measurements per orbit will be acquired 270 looking at Mars and 60 for calibrations. PFS is able to take measurements at all local times, facilitating the retrieval of surface temperatures and atmospheric vertical temperature profiles on both the day and the night side. (c) 2005 Elsevier Ltd. All rights reserved. C1 INAF, IFSI, I-00133 Rome, Italy. Univ Padua, CISAS, I-35131 Padua, Italy. Russian Acad Sci, IKI, Inst Space Res, Moscow 117997, Russia. Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA. Univ Lecce, Dipartimento Fis, I-73100 Lecce, Italy. SRC PAS, PL-00716 Warsaw, Poland. Osserv Astron Capodimonte, INAF, I-80131 Naples, Italy. Planetary Sci Inst, Pacific NW Div, Dept Earth & Space Sci, Seattle, WA USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Observ Paris, LESIA, F-92195 Meudon, France. IASF, INAF, I-00133 Rome, Italy. Politecn Milan, Dipartimento Meccan, Milan, Italy. DLR, German Aerosp Ctr, Opt Informat Syst, D-12489 Berlin, Germany. RP Formisano, V (reprint author), INAF, IFSI, Via Fosso Cavaliere 100, I-00133 Rome, Italy. EM vittorio.formisano@ifsi.rm.cnr.it RI Khatuntsev, Igor/B-4248-2015; OI Khatuntsev, Igor/0000-0002-3256-122X; Esposito, Francesca/0000-0001-9962-1648; Biondi, David/0000-0002-8860-5674; Mattana, Andrea/0000-0002-0496-0098; Piccioni, Giuseppe/0000-0002-7893-6808; GIURANNA, Marco/0000-0001-8967-9184; saggin, bortolino/0000-0002-4033-3585; Palomba, Ernesto/0000-0002-9101-6774 NR 22 TC 81 Z9 83 U1 1 U2 17 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0032-0633 J9 PLANET SPACE SCI JI Planet Space Sci. PD AUG PY 2005 VL 53 IS 10 BP 963 EP 974 DI 10.1016/j.pss.2004.12.006 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 950PX UT WOS:000230870600003 ER PT J AU Hansen, G Giuranna, M Formisano, V Fonti, S Grassi, D Hirsh, H Ignatiev, N Maturilli, A Orleanski, P Piccioni, G Rataj, M Saggin, B Zasova, L AF Hansen, G Giuranna, M Formisano, V Fonti, S Grassi, D Hirsh, H Ignatiev, N Maturilli, A Orleanski, P Piccioni, G Rataj, M Saggin, B Zasova, L TI PFS-MEX observation of ices in the residual south polar cap of Mars SO PLANETARY AND SPACE SCIENCE LA English DT Article ID CARBON-DIOXIDE; CO2 FROST; MU-M; SURFACE; SPECTROMETER; ATMOSPHERE; BEHAVIOR; SIZE AB The Mars Express spacecraft has a highly inclined orbit around Mars and so has been able to observe the south pole of Mars in illuminated conditions at the end of the southern summer (L-s = 330). Spectra from the planetary Fourier spectrometer (PFS) short wavelength (SW) channel were recorded over the permanent ice cap to study its composition in terms Of CO2 ice and H2O ice. Models are fitted to the observed data, which include a spatial mixture of soil (not covered by ice) and CO2 frost (with a specific grain size and a small amount of included dust and H2O ice). Two different kinds of spectra were observed: those over the permanent polar cap with almost pure CO2 ice, negligible water ice, no soil fraction required, and bright; and those over mixed terrain (at the edge of the cap or near troughs) containing a significant soil spatial fraction, more water ice and smaller CO2 grain size. The amount of water ice given by fits to scaled albedo models is less than 10 ppm by weight. When using multi-stream reflectance models with the appropriate lighting geometry, the water amount must be 2-5 times greater than the albedo fit (less than 50 ppm). At the periphery of the residual polar cap, we found a region almost completely covered by water frost, modeled as a mixture of micron-sized and sub-mm sized grains. Our result using a granular mixture of micron-sized grains of water ice and dust with the CO2 grains is different from the modeling of OMEGA polar cap observations using molecular mixtures. (c) 2005 Elsevier Ltd. All rights reserved. C1 Univ Washington, Dept Earth & Space Sci, Pacific NW Div, Planetary Sci Inst, Seattle, WA 98195 USA. INAF, IFSI, I-00133 Rome, Italy. Univ Lecce, Dipartimento Fis, I-73100 Lecce, Italy. DLR, German Aerosp Ctr, Opt Informat Syst, D-12489 Berlin, Germany. Russian Acad Sci, Space Res Inst, IKI, Moscow 117997, Russia. PAS, SRC, PL-00716 Warsaw, Poland. IASF, INAF, I-00133 Rome, Italy. Politecn Milan, Dipartimento Meccan, Lecce, Italy. RP Hansen, G (reprint author), Univ Washington, Dept Earth & Space Sci, Pacific NW Div, Planetary Sci Inst, Box 351310, Seattle, WA 98195 USA. EM ghansen@rad.ess.washington.edu OI Piccioni, Giuseppe/0000-0002-7893-6808; GIURANNA, Marco/0000-0001-8967-9184; saggin, bortolino/0000-0002-4033-3585 NR 15 TC 14 Z9 16 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0032-0633 J9 PLANET SPACE SCI JI Planet Space Sci. PD AUG PY 2005 VL 53 IS 10 BP 1089 EP 1095 DI 10.1016/j.pss.2004.12.011 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 950PX UT WOS:000230870600013 ER PT J AU Karnosky, DF Pregitzer, KS Zak, DR Kubiske, ME Hendrey, GR Weinstein, D Nosal, M Percy, KE AF Karnosky, DF Pregitzer, KS Zak, DR Kubiske, ME Hendrey, GR Weinstein, D Nosal, M Percy, KE TI Scaling ozone responses of forest trees to the ecosystem level in a changing climate SO PLANT CELL AND ENVIRONMENT LA English DT Article DE Populus tremuloides; carbon accumulation and allocation; carbon dioxide; C and N cycling; climate change; ecosystem scaling; modelling; pest interactions; trembling aspen; tropospheric ozone ID ASPEN POPULUS-TREMULOIDES; ELEVATED CARBON-DIOXIDE; OXIDANT AIR-POLLUTION; CO2 AND/OR O-3; TREMBLING ASPEN; TROPOSPHERIC OZONE; BETULA-PAPYRIFERA; ATMOSPHERIC CO2; INTERACTING OZONE; GROWTH-RESPONSES AB Many uncertainties remain regarding how climate change will alter the structure and function of forest ecosystems. At the Aspen FACE experiment in northern Wisconsin, we are attempting to understand how an aspen/birch/maple forest ecosystem responds to long-term exposure to elevated carbon dioxide (CO(2)) and ozone (O(3)), alone and in combination, from establishment onward. We examine how O(3) affects the flow of carbon through the ecosystem from the leaf level through to the roots and into the soil micro-organisms in present and future atmospheric CO(2) conditions. We provide evidence of adverse effects of O(3), with or without co-occurring elevated CO(2), that cascade through the entire ecosystem impacting complex trophic interactions and food webs on all three species in the study: trembling aspen (Populus tremuloides Michx.), paper birch (Betula papyrifera Marsh), and sugar maple (Acer saccharum Marsh). Interestingly, the negative effect of O(3) on the growth of sugar maple did not become evident until 3 years into the study. The negative effect of O(3) effect was most noticeable on paper birch trees growing under elevated CO(2). Our results demonstrate the importance of long-term studies to detect subtle effects of atmospheric change and of the need for studies of interacting stresses whose responses could not be predicted by studies of single factors. In biologically complex forest ecosystems, effects at one scale can be very different from those at another scale. For scaling purposes, then, linking process with canopy level models is essential if O(3) impacts are to be accurately predicted. Finally, we describe how outputs from our long-term multispecies Aspen FACE experiment are being used to develop simple, coupled models to estimate productivity gain/loss from changing O(3). C1 Michigan Technol Univ, Sch Forest Resources & Environm Sci, Houghton, MI 49931 USA. Univ Michigan, Sch Nat Resources & Environm, Ann Arbor, MI 48109 USA. US Forest Serv, USDA, N Cent res Stn, Forestry Sci Lab, Rhinelander, WI 54501 USA. CUNY Queens Coll, Flushing, NY 11367 USA. Brookhaven Natl Lab, Flushing, NY 11367 USA. Cornell Univ, Boyce Thompson Inst Plant Res, Ithaca, NY 14853 USA. Univ Calgary, Dept Math & Stat, Calgary, AB T2N 1N4, Canada. Canadian Forest Serv, Atlantic Forestry Ctr, Nat Resources Canada, Fredericton, NB E3B 5P7, Canada. RP Karnosky, DF (reprint author), Michigan Technol Univ, Sch Forest Resources & Environm Sci, 1400 Townsend Dr, Houghton, MI 49931 USA. EM karnosky@mtu.edu RI Zak, Donald/C-6004-2012 NR 89 TC 163 Z9 178 U1 5 U2 44 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0140-7791 J9 PLANT CELL ENVIRON JI Plant Cell Environ. PD AUG PY 2005 VL 28 IS 8 BP 965 EP 981 DI 10.1111/j.1365-3040.2005.01362.x PG 17 WC Plant Sciences SC Plant Sciences GA 944MC UT WOS:000230432100002 ER PT J AU Zimeri, AM Dhankher, OP McCaig, B Meagher, RB AF Zimeri, AM Dhankher, OP McCaig, B Meagher, RB TI The plant MT1 metallothioneins are stabilized by binding cadmiums and are required for cadmium tolerance and accumulation SO PLANT MOLECULAR BIOLOGY LA English DT Article DE cysteine spacing pattern; evolution; metal accumulation; RNA interference; thiol reactivity ID ARABIDOPSIS-THALIANA; ESCHERICHIA-COLI; ZINC TRANSFER; GLUCOCORTICOID RECEPTOR; ALCOHOL-DEHYDROGENASE; ARSENATE REDUCTASE; GENE FAMILY; I GENE; EXPRESSION; METAL AB The small Arabidopsis genome contains nine metallothionein-like (MT) sequences with classic, cysteine-rich domains separated by spacer sequences, quite unlike the small conserved MT families found vertebrate genomes. Phylogenetic analysis revealed four ancient and divergent classes of plant MTs that predate the monocot-dicot divergence. A distinct cysteine spacing pattern suggested differential metal ion specificity for each class. The in vivo stability of representatives of the four classes of plant MT proteins and a mouse MT2 control expressed in E. coli were enhanced by cadmium (Cd). Particular MTs were also stabilized by arsenic (As), copper (Cu), and or zinc (Zn). To understand why plants have such a diversity of MT sequences, the Arabidopsis MT1 class, comprised of three genes, MT1a, MT1b, and MT1c, was characterized in more detail in plants. MT1 family transcripts were knocked down to less than 5-10% of wild-type levels in Arabidopsis by expression of a RNA interference (RNAi) construct. The MT1 knockdown plant lines were all hypersensitive to Cd and accumulated several fold lower levels of As, Cd, and Zn than wildtype, while Cu and Fe levels were unaffected. The ancient class of MT1 protein sequences may be preserved in plant genomes, because it has distinct metal-binding properties, confers tolerance to cadmium, and can assist with zinc homeostasis. C1 Univ Georgia, Dept Genet, Athens, GA 30602 USA. Michigan State Univ, DOE Plant Res Labs, E Lansing, MI 48824 USA. RP Meagher, RB (reprint author), Univ Georgia, Dept Genet, Athens, GA 30602 USA. EM zimeri@uga.edu; meagher@uga.edu RI Dhankher, Om Parkash/P-1880-2016; OI Dhankher, Om Parkash/0000-0003-0737-6783 NR 66 TC 73 Z9 77 U1 3 U2 16 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0167-4412 J9 PLANT MOL BIOL JI Plant Mol.Biol. PD AUG PY 2005 VL 58 IS 6 BP 839 EP 855 DI 10.1007/s11103-005-8268-3 PG 17 WC Biochemistry & Molecular Biology; Plant Sciences SC Biochemistry & Molecular Biology; Plant Sciences GA 976WA UT WOS:000232763000007 PM 16240177 ER PT J AU Yong, WD Link, B O'Malley, R Tewari, J Hunter, CT Lu, CA Li, XM Bleecker, AB Koch, KE McCann, MC McCarty, DR Patterson, SE Reiter, WD Staiger, C Thomas, SR Vermerris, W Carpita, NC AF Yong, WD Link, B O'Malley, R Tewari, J Hunter, CT Lu, CA Li, XM Bleecker, AB Koch, KE McCann, MC McCarty, DR Patterson, SE Reiter, WD Staiger, C Thomas, SR Vermerris, W Carpita, NC TI Genomics of plant cell wall biogenesis SO PLANTA LA English DT Article DE Arabidopsis thaliana; Zea mays; cell wall; mutants; polysaccharides; lignin; biosynthesis; genomics; infrared spectroscopy; chemometrics; artificial neural networks ID ARABIDOPSIS-THALIANA; GENE FAMILY; PROTEINS; SYNTHASE; WIDE; ARCHITECTURE; EXPRESSION; DEPOSITION; MUTANTS; ENZYMES C1 Purdue Univ, Dept Bot & Plant Pathol, W Lafayette, IN 47907 USA. Univ Connecticut, Dept Mol & Cell Biol, Storrs, CT 06269 USA. Univ Wisconsin, Dept Bot, Madison, WI 53706 USA. Univ Wisconsin, Dept Hort, Madison, WI 53706 USA. Purdue Univ, Dept Biol Sci, W Lafayette, IN 47907 USA. Univ Florida, Dept Hort Sci, Gainesville, FL 32611 USA. Natl Bioenergy Ctr, Natl Renewable Energy Lab, Golden, CO 80401 USA. Purdue Univ, Dept Agron, W Lafayette, IN 47907 USA. Purdue Univ, Dept Agr, W Lafayette, IN 47907 USA. Purdue Univ, Dept Biol Engn, W Lafayette, IN 47907 USA. RP Carpita, NC (reprint author), Purdue Univ, Dept Bot & Plant Pathol, 915 W State St, W Lafayette, IN 47907 USA. EM carpita@purdue.edu NR 35 TC 53 Z9 59 U1 1 U2 12 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0032-0935 J9 PLANTA JI Planta PD AUG PY 2005 VL 221 IS 6 BP 747 EP 751 DI 10.1007/s00425-005-1563-z PG 5 WC Plant Sciences SC Plant Sciences GA 956PV UT WOS:000231313200001 PM 15981004 ER PT J AU Cohen, RH Ryutov, DD AF Cohen, RH Ryutov, DD TI On the possibility of the sheath-driven, finite-beta modes localized near the divertor plate SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article ID TEMPERATURE-GRADIENT INSTABILITY; SCRAPE-OFF LAYER; CONDUCTING END-WALLS; MAGNETIC-FIELD; PLASMA; TURBULENCE; TOKAMAKS AB It is shown that, in a finite beta plasma, there may exist sheath-driven modes whose amplitude decreases exponentially with the distance from the divertor plate. The modes are sensitive to the radial tilt of the divertor plate. The short-wavelength branch of the instability, with the cross-field wavelength lambda of the order of a few ion gyro-radii, is present in the case of a 'positive' tilt of the divertor plate, whereas the long-wavelength branch, with lambda, of the order of the 10 or so gyro-radii is unstable for the opposite sign of the tilt. The parallel e-folding length becomes less than the distance from the plate to the X-point (thereby making the mode insensitive to the processes near the X-point and the upper scrape-off layer) at plasma betas exceeding (2-3) x 10(-4). A detailed analysis of the dispersion relations is provided. The features of the modes that can be used for their experimental identification are discussed. It is pointed out that the analogue of these modes may also exist in linear plasma devices with shaped end electrodes. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Cohen, RH (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. EM rcohen@llnl.gov NR 22 TC 3 Z9 3 U1 1 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD AUG PY 2005 VL 47 IS 8 BP 1187 EP 1206 DI 10.1088/0741-3335/47/8/004 PG 20 WC Physics, Fluids & Plasmas SC Physics GA 960PU UT WOS:000231606400004 ER PT J AU Lin, Y Wukitch, S Parisot, A Wright, JC Basse, N Bonoli, P Edlund, E Lin, L Porkolab, M Schilling, G Phillips, P AF Lin, Y Wukitch, S Parisot, A Wright, JC Basse, N Bonoli, P Edlund, E Lin, L Porkolab, M Schilling, G Phillips, P TI Observation and modelling of ion cyclotron range of frequencies waves in the mode conversion region of Alcator C-Mod SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article ID TOKAMAK PLASMAS; BERNSTEIN WAVES; PROFILE; TFTR AB The fastmagnetosonic wave, mode converted ion cyclotron wave (MC ICW) and mode converted ion Bernstein wave (MC IBW) have all been observed and unambiguously identified in the mode conversion region of Alcator C-Mod. The influences of the species mix, mode conversion location and B-pol/B-tot have been studied in D(He-3) plasmas at B-0 similar to 5.4T (f(RF) = 50 MHz) and B-0 similar to 8 T (f(RF) = 78 MHz). The RF waves were measured by a phase contrast imaging (PCI) system. The experimental observation is compared with the result from a synthetic PCI diagnostic based upon the full wave code TORIC. Good agreement between the observation and modelling has been obtained on the spatial structure of the RF waves. When the mode conversion layer was off axis, both MC ICW and MC IBW were observed. In 5.4 T near-axis mode conversion discharges, the double hump spatial structure of the MC waves was observed experimentally and reproduced by the synthetic PCI. Such a structure is an indication of the up-down asymmetry of the MC ICW. In 8 T near-axis mode conversion discharges, we had the first definitive observation of IBW dominated MC in Alcator C-Mod. C1 MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Univ Texas, Fus Res Ctr, Austin, TX 78712 USA. RP Lin, Y (reprint author), MIT, Plasma Sci & Fus Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA. EM ylin@psfc.mit.edu RI Lin, Yijun/B-5711-2009; Lin, Liang/H-2255-2011; OI Basse, Nils/0000-0002-4513-8869 NR 29 TC 23 Z9 23 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD AUG PY 2005 VL 47 IS 8 BP 1207 EP 1228 DI 10.1088/0741-3335/47/8/005 PG 22 WC Physics, Fluids & Plasmas SC Physics GA 960PU UT WOS:000231606400005 ER PT J AU Lee, W Onge, RPS Proctor, M Flaherty, P Jordan, MI Arkin, AP Davis, RW Nislow, C Giaever, G AF Lee, W Onge, RPS Proctor, M Flaherty, P Jordan, MI Arkin, AP Davis, RW Nislow, C Giaever, G TI Genome-wide requirements for resistance to functionally distinct DNA-damaging agents SO PLOS GENETICS LA English DT Article ID SACCHAROMYCES-CEREVISIAE GENOME; SENSITIVE MUTANTS; HOMOLOGOUS RECOMBINATION; ANTICANCER AGENTS; DRUG-RESISTANCE; GENE DISRUPTION; BUDDING YEAST; MITOMYCIN-C; I-DNA; REPAIR AB The mechanistic and therapeutic differences in the cellular response to DNA-damaging compounds are not completely understood, despite intense study. To expand our knowledge of DNA damage, we assayed the effects of 12 closely related DNA-damaging agents on the complete pool of similar to 4,700 barcoded homozygous deletion strains of Saccharomyces cerevisiae. In our protocol, deletion strains are pooled together and grown competitively in the presence of compound. Relative strain sensitivity is determined by hybridization of PCR-amplified barcodes to an oligonucleotide array carrying the barcode complements. These screens identified genes in well-characterized DNA-damage-response pathways as well as genes whose role in the DNA-damage response had not been previously established. High-throughput individual growth analysis was used to independently confirm microarray results. Each compound produced a unique genome-wide profile. Analysis of these data allowed us to determine the relative importance of DNA-repair modules for resistance to each of the 12 profiled compounds. Clustering the data for 12 distinct compounds uncovered both known and novel functional interactions that comprise the DNA-damage response and allowed us to define the genetic determinants required for repair of interstrand cross-links. Further genetic analysis allowed determination of epistasis for one of these functional groups. C1 Stanford Univ, Dept Biochem, Sch Med, Stanford Genome Technol Ctr, Palo Alto, CA 94304 USA. Stanford Univ, Dept Genet, Sch Med, Stanford, CA 94305 USA. Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA USA. Univ Calif Berkeley, Div Comp Sci, Dept Stat, Berkeley, CA 94720 USA. Univ Calif Berkeley, Howard Hughes Med Inst, Dept Bioengn, Berkeley, CA 94720 USA. RP Giaever, G (reprint author), Stanford Univ, Dept Biochem, Sch Med, Stanford Genome Technol Ctr, Palo Alto, CA 94304 USA. EM ggiaever@stanford.edu RI Arkin, Adam/A-6751-2008; Flaherty, Patrick/A-1720-2011; OI Arkin, Adam/0000-0002-4999-2931; Nislow, Corey/0000-0002-4016-8874 NR 82 TC 105 Z9 115 U1 1 U2 10 PU PUBLIC LIBRARY SCIENCE PI SAN FRANCISCO PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA SN 1553-7390 J9 PLOS GENET JI PLoS Genet. PD AUG PY 2005 VL 1 IS 2 BP 235 EP 246 AR e24 DI 10.1371/journal.pgen.0010024 PG 12 WC Genetics & Heredity SC Genetics & Heredity GA 003WZ UT WOS:000234714200011 PM 16121259 ER PT J AU Hobbs, ML AF Hobbs, ML TI Modeling epoxy foams exposed to fire-like heat fluxes SO POLYMER DEGRADATION AND STABILITY LA English DT Article DE removable epoxy foam; decomposition; confinement; pressurization; adsorbed gases ID POLYURETHANE FOAM; COAL; DEVOLATILIZATION; KINETICS AB A decomposition chemistry and heat transfer model to predict the response of removable epoxy foam (REF) exposed to fire-like heat fluxes is described. The epoxy foam was created using a perfluorohexane blowing agent with a surfactant. The model includes desorption of the blowing agent and surfactant, thermal degradation of the epoxy polymer, polymer fragment transport, and vapor-liquid equilibrium. An effective thermal conductivity model describes changes in thernial conductivity with reaction extent. Pressurization is modeled assuming: (1) no strain in the condensed-phase, (2) no resistance to gas-phase transport, (3) spatially uniform stress fields, and (4) no mass loss from the system due to venting. The model has been used to predict mass loss, pressure rise, and decomposition front locations for various small-scale and large-scale experiments performed by others. The framework of the model is suitable for polymeric foams with absorbed gases. Published by Elsevier Ltd. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Hobbs, ML (reprint author), Sandia Natl Labs, POB 5800,MS-0836, Albuquerque, NM 87185 USA. EM mlhobbs@sandia.gov NR 28 TC 11 Z9 11 U1 1 U2 3 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0141-3910 J9 POLYM DEGRAD STABIL JI Polym. Degrad. Stabil. PD AUG PY 2005 VL 89 IS 2 BP 353 EP 372 DI 10.1016/j.polymdegradstab.2005.01.021 PG 20 WC Polymer Science SC Polymer Science GA 940PR UT WOS:000230156900018 ER PT J AU Patel, M Skinner, AR Maxwell, RS AF Patel, M Skinner, AR Maxwell, RS TI Sensitivity of condensation cured polysiloxane rubbers to sealed and open-to air thermal ageing regimes SO POLYMER TESTING LA English DT Article DE polysiloxane rubber; tin catalyst; open and sealed ageing; chain dynamics ID POLYDIMETHYLSILOXANE AB The results of a study investigating the thermal ageing properties in sealed and open to air regimes of a unfilled condensation curing (tin catalysed) organosiloxane polymer from Dow Corning (MS2420) and a room temperature vulcanising siloxane (RTV5370) from Rhodia silicones is presented. MS2420 samples were aged in air at 60 degrees C for 6 months and 90 degrees C for 1 month. Changes to the non-network species in aged MS2420 samples was assessed principally by GCMS and GPC of the solvent extractable matter. Closed system ageing generated cure reversion (thermally activated degradation processes involving chain scission) of the non-network chains whilst open system ageing results in loss of low molecular weight species. Suppressing volatile emission, as in sealed ageing, promotes cure reversion leading to the build-up of low molecular weight species in the rubber network. Excess residual catalyst levels cause postcure effects that reduce the amount of non-network siloxane species. In a separate set of experiments, cured RTV5370 siloxane rubbers have been thermally aged in open to air and sealed (inert atmosphere) regimes at temperatures up to 200 degrees C. Changes to the polymer network in aged RTV5370 samples was assessed by Instron compression tests, rubber hardness (IRHD) and segmental chain dynamics using solid-state nuclear magnetic resonance. The observed trend in sealed ageing regimes is that of softening of the rubber with loss of compressive strength and increased segmental chain dynamics. Studies on real-time aged RTV5370 rubbers derived from field trials suggest that a sealed polymer ageing methodology best represents the in-service ageing regime. In summary, our results show that the thermal ageing behaviour of condensation cured polysiloxane rubbers is sensitive to the ageing regime. These finding help define the best accelerated ageing methodology for the polymer system which in turn may lead to increased confidence in lifetime prediction studies. Crown Copyright (c) 2005 Published by Elsevier Ltd. All rights reserved. C1 Atom Weapons Estab, Reading RG7 4PR, Berks, England. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Patel, M (reprint author), Atom Weapons Estab, Reading RG7 4PR, Berks, England. EM mogon.patel@ztwe.co.uk NR 9 TC 25 Z9 25 U1 1 U2 34 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0142-9418 J9 POLYM TEST JI Polym. Test PD AUG PY 2005 VL 24 IS 5 BP 663 EP 668 DI 10.1016/j.polymertesting.2005.03.013 PG 6 WC Materials Science, Characterization & Testing; Polymer Science SC Materials Science; Polymer Science GA 938DB UT WOS:000229979000019 ER PT J AU Green, MA Emery, K King, DL Igari, S Warta, W AF Green, MA Emery, K King, DL Igari, S Warta, W TI Solar cell efficiency tables - (Version 26) SO PROGRESS IN PHOTOVOLTAICS LA English DT Article DE solar cell efficiency; photovoltaic efficiency; energy conversion efficiency AB Consolidated tables showing an extensive listing of the highest independently confirmed efficiencies for solar cells and modules are presented. Guidelines for inclusion of results into these tables are outlined and new entries since January, 2005 are reviewed. Copyright (c) 2005 John Wiley & Sons, Ltd. C1 Univ New S Wales, Ctr Photovolta Engn, Sydney, NSW 2052, Australia. Natl Renewable Energy Lab, Golden, CO 80401 USA. Sandia Natl Labs, Albuquerque, NM 87123 USA. Natl Inst Adv Ind Sci & Technol, AIST, RCPV, Tsukuba, Ibaraki, Japan. Fraunhofer Inst Solar Energy Syst, Dept Solar Cells Mat & Technol, D-79106 Freiburg, Germany. RP Green, MA (reprint author), Univ New S Wales, Ctr Photovolta Engn, Sydney, NSW 2052, Australia. EM m.green@unsw.edu.au NR 50 TC 17 Z9 18 U1 2 U2 12 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 1062-7995 J9 PROG PHOTOVOLTAICS JI Prog. Photovoltaics PD AUG PY 2005 VL 13 IS 5 BP 387 EP 392 DI 10.1002/pip.651 PG 6 WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied SC Energy & Fuels; Materials Science; Physics GA 947RN UT WOS:000230664000003 ER PT J AU Frechet, JMJ AF Frechet, JMJ TI Functional polymers: from plastic electronics to polymer-assisted therapeutics SO PROGRESS IN POLYMER SCIENCE LA English DT Article; Proceedings Paper CT 40th International Symposium on Macromolecules CY JUL 04-09, 2004 CL Paris, FRANCE SP IUPC DE functional polymer; organic electronics; polymer therapeutics; light emitting diode; photovoltaics; organic transistor; drug delivery; vaccine carrier ID REMOVABLE SOLUBILIZING GROUPS; PROTEIN-BASED VACCINES; LIGHT-EMITTING-DIODES; HYBRID SOLAR-CELLS; DRUG-DELIVERY; MOLECULAR-WEIGHT; ELECTROPHOSPHORESCENT DEVICES; DENDRITIC MACROMOLECULES; CONJUGATED POLYMERS; DIVERGENT SYNTHESIS AB Functional macromolecules once sought almost exclusively for their mechanical or thermal properties are now finding numerous applications in a great variety of areas. In some cases, newly designed functional polymers provide such an array of new properties and functions that they effectively create fields rather than extend or support them. This brief account focusing largely on the work of the author's own laboratory explores recent advances in the design of functional polymers in two seemingly very disparate areas: organic or 'plastic' electronics and polymer therapeutics. While at first glance the requirements for functional polymers appear to be quite different for these two areas, the same general design concepts apply, focusing first on the definition of the key properties to be achieved, followed by the establishment of a synthetic blueprint encompassing these aims, and concluding with proof of concept studies. The examples given in this account illustrate the vibrant nature of research in the area of functional polymers and its great potential impact on to-morrow's technologies. (c) 2005 Elsevier Ltd. All rights reserved. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA USA. RP Frechet, JMJ (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM frechet@berkeley.edu OI Frechet, Jean /0000-0001-6419-0163 NR 54 TC 57 Z9 57 U1 4 U2 19 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0079-6700 J9 PROG POLYM SCI JI Prog. Polym. Sci. PD AUG-SEP PY 2005 VL 30 IS 8-9 BP 844 EP 857 DI 10.1016/j.progpolymsci.2005.06.005 PG 14 WC Polymer Science SC Polymer Science GA 968OB UT WOS:000232170700004 ER PT J AU Maezawa, Y Hatsuda, T Sasaki, S AF Maezawa, Y Hatsuda, T Sasaki, S TI Strange tribaryons as nona-quark states SO PROGRESS OF THEORETICAL PHYSICS LA English DT Article ID SKYRME MODEL; BAG MODEL; BARYON; MASSES AB Strange tribaryons as nona-quark (nine quark) states are studied in an attempt to describe the S resonance S-o(3115) recently discovered in the reaction K- + He-4 --> S-o + p. We have identified S-o(3115) as a member of a flavor 27-plet, specifically, (F-flavor) I-isospin, J(spin)) = (27, 1, 1/2) or (27, 1, 3/2). We investigate the mass splittings of the nona-quark system from the point of view of the color-magnetic interaction and the flavor SUF (3) breaking. The color-magnetic interaction between quarks favors small multiplets in flavor and spin, which leads to the natural explanation that I = 1 is the lowest state among the S = -1 tribaryons with J = -/2. Classification of the S+ state recently reported as well as possible locations of other light strange tribaryons, such as (10*, 0, 3/2) with S = -1, (8, 1/2, 1/2) with S = -2, and (1, 0 3/2) with S = -3, is also studied. C1 Univ Tokyo, Dept Phys, Tokyo 1130033, Japan. Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA. RP Maezawa, Y (reprint author), Univ Tokyo, Dept Phys, Tokyo 1130033, Japan. RI Hatsuda, Tetsuo/C-2901-2013 NR 22 TC 5 Z9 5 U1 0 U2 0 PU PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE PI KYOTO PA C/O KYOTO UNIV, YUKAWA HALL, KYOTO, 606-8502, JAPAN SN 0033-068X J9 PROG THEOR PHYS JI Prog. Theor. Phys. PD AUG PY 2005 VL 114 IS 2 BP 317 EP 327 DI 10.1143/PTP.114.317 PG 11 WC Physics, Multidisciplinary SC Physics GA 963BP UT WOS:000231778100003 ER PT J AU Miller, KD Weaver-Feldhaus, J Gray, SA Siegel, RW Feldhaus, MJ AF Miller, KD Weaver-Feldhaus, J Gray, SA Siegel, RW Feldhaus, MJ TI Production, purification, and characterization of human scFv antibodies expressed in Saccharomyces cerevisiae, Pichia pastoris, and Escherichia coli SO PROTEIN EXPRESSION AND PURIFICATION LA English DT Article DE scFv; expression; activity; purification ID SINGLE-CHAIN ANTIBODY; HIGH-LEVEL EXPRESSION; FV ANTIBODY; FUNCTIONAL EXPRESSION; SURFACE DISPLAY; FRAGMENT; CLONING; CYTOPLASM; LIBRARY; STABILITY AB Single chain (scFv) antibodies are used as affinity reagents for diagnostics, therapeutics, and proteomic analyses. The antibody discovery platform we use to identify novel antigen binders involves discovery, characterization, and production. The discovery and characterization components have previously been characterized but in order to fully utilize the capabilities of affinity reagents from our yeast surface display library, efforts were focused on developing a production component to obtain purified, soluble, and active scFvs. Instead of optimizing conditions to achieve maximum yield, efforts were focused on using a system that could quickly and easily produce and process hundreds of scFv antibodies. Heterologous protein expression in Saccharomyces cerevisiae, Pichia pastoris, and Escherichia coli were evaluated for their ability to rapidly, efficaciously, and consistently produce scFv antibodies for use in downstream proteomic applications. Following purification, the binding activity of several scFv antibodies were quantified using a novel Biacore assay. All three systems produced soluble scFv antibodies which ranged in activity from 0 to 99%. scFv antibody yields from Saccharomyces, Pichia, and E coli were 1.5-4.2, 0.4-7.3, and 0.63-16.4 mg L-1 culture, respectively. For our purposes, expression in E coli proved to be the quickest and most consistent way to obtain and characterize purified scFv for downstream applications. The E coli expression system was subsequently used to study three scFv variants engineered to determine structure-function relationships. (c) 2005 Elsevier Inc. All rights reserved. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Feldhaus, MJ (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd,POB 999, Richland, WA 99352 USA. EM mfeldhaus@merrimackpharma.com OI Siegel, Robert/0000-0002-0833-5580 FU NCRR NIH HHS [RR18522] NR 40 TC 51 Z9 60 U1 3 U2 17 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 1046-5928 EI 1096-0279 J9 PROTEIN EXPRES PURIF JI Protein Expr. Purif. PD AUG PY 2005 VL 42 IS 2 BP 255 EP 267 DI 10.1016/j.pep.2005.04.015 PG 13 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA 951EO UT WOS:000230912100004 PM 15946857 ER PT J AU Strop, P Brunger, AT AF Strop, P Brunger, AT TI Refractive index-based determination of detergent concentration and its application to the study of membrane proteins SO PROTEIN SCIENCE LA English DT Article DE refractive index; detergent concentration; dn/dc; micelle size ID SIZE-EXCLUSION CHROMATOGRAPHY; LIGHT-SCATTERING; CRYSTALLIZATION AB The concentration of detergent in membrane protein preparations can have a critical role on protein stability, function, and the potential for crystallization. Unfortunately, dialysis or protein concentration can lead to an unknown amount of detergent in the final membrane protein preparations. Here we present a method for the determination of detergent concentration based on refractive index of the detergent solution. This method was applied to quantitate the amount of detergent remaining in solution after concentration in various concentrators. We found that the ability of the tested detergents to pass through the molecular weight cutoff membrane correlates well with detergent micelle size. Therefore, the micelle size can be used as a rough guide to estimate the retention of a given detergent in various molecular weight cutoff concentrators. The refractive index method is exceptionally informative when coupled with size exclusion chromatography and light scattering, and can be used to determine the oligomeric state of the membrane protein, the size of a protein-associated micelle, as well as the amount and size of the unbound detergent micelle. C1 Stanford Univ, Sch Med, Howard Hughes Med Inst, James H Clark Ctr, Stanford, CA 94305 USA. Stanford Univ, James H Clark Ctr, Dept Mol & Cellular Physiol, Stanford, CA 94305 USA. Stanford Univ, James H Clark Ctr, Dept Neurol & Neurol Sci, Stanford, CA 94305 USA. Stanford Univ, James H Clark Ctr, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA. RP Brunger, AT (reprint author), Stanford Univ, Sch Med, Howard Hughes Med Inst, James H Clark Ctr, E300-C,318 Campus Dr, Stanford, CA 94305 USA. EM brunger@stanford.edu OI Brunger, Axel/0000-0001-5121-2036 NR 19 TC 99 Z9 101 U1 1 U2 23 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0961-8368 EI 1469-896X J9 PROTEIN SCI JI Protein Sci. PD AUG PY 2005 VL 14 IS 8 BP 2207 EP 2211 DI 10.1110/ps.051543805 PG 5 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 950QT UT WOS:000230872900029 PM 16046633 ER PT J AU Elias, DA Monroe, ME Marshall, MJ Romine, MF Belieav, AS Fredrickson, JK Anderson, GA Smith, RD Lipton, MS AF Elias, DA Monroe, ME Marshall, MJ Romine, MF Belieav, AS Fredrickson, JK Anderson, GA Smith, RD Lipton, MS TI Global detection and characterization of hypothetical proteins in Shewanella oneidensis MR-1 using LC-MS based proteomics SO PROTEOMICS LA English DT Article DE accurate mass and time tag; hypothetical protein; MS proteomics; Shewanella ID MICROBIAL GENE IDENTIFICATION; GRAM-NEGATIVE BACTERIA; PUTREFACIENS MR-1; GENOME SEQUENCE; MEMBRANE-VESICLES; MN(IV) REDUCTION; FE(III); ION; SECRETION; CALCIUM AB The availability of whole genome sequences has enabled the application of powerful tools for assaying global expression patterns in environmentally relevant bacteria such as Shewanella oneidensis MR-1. A large number of genes in prokaryote genomes, including MR-1, have been annotated as hypothetical, indicating that no similar protein has yet been identified in other organisms. Using high-sensitivity MS coupled with accurate mass and time (AMT) tag methodology, 1078 tryptic peptides were collectively detected in MR-1 cultures, 671 of which were unique to their parent protein. Using only these unique tryptic peptides and a minimum of two peptides per protein, we identified, with high confidence, the expression of 258 hypothetical proteins. These proteins ranged from 3.5 to 139 kDa, with 47 being 100 amino acid residues or less. Using a combination of information including detection in cells grown under specific culture conditions, presence within a specific cell fraction, and predictive algorithms such as PSORT and PSORT-B, possible/plausible functions are proposed for some hypothetical proteins. Further, by applying this approach a number of proteins were found not only to be expressed, but only expressed under certain culturing conditions, thereby suggesting function while at the same time isolating several proteins to distinct locales of the cell. These results demonstrate the utility of the AMT tag methodology for comprehensive profiling of the microbial proteome while confirming the expression of a large number of hypothetical genes. C1 Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA. RP Lipton, MS (reprint author), Pacific NW Natl Lab, Div Biol Sci, POB 999,MSIN K8-098, Richland, WA 99352 USA. EM mary.lipton@pnl.gov RI Elias, Dwayne/B-5190-2011; Smith, Richard/J-3664-2012; OI Elias, Dwayne/0000-0002-4469-6391; Smith, Richard/0000-0002-2381-2349; Romine, Margaret/0000-0002-0968-7641 NR 29 TC 41 Z9 44 U1 0 U2 11 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1615-9853 J9 PROTEOMICS JI Proteomics PD AUG PY 2005 VL 5 IS 12 BP 3120 EP 3130 DI 10.1002/pmic.200401140 PG 11 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 956QW UT WOS:000231315900016 PM 16038018 ER PT J AU Omenn, GS States, DJ Adamski, M Blackwell, TW Menon, R Hermjakob, H Apweiler, R Haab, BB Simpson, RJ Eddes, JS Kapp, EA Moritz, RL Chan, DW Rai, AJ Admon, A Aebersold, R Eng, J Hancock, WS Hefta, SA Meyer, H Paik, YK Yoo, JS Ping, PP Pounds, J Adkins, J Qian, XH Wang, R Wasinger, V Wu, CY Zhao, XH Zeng, R Archakov, A Tsugita, A Beer, I Pandey, A Pisano, M Andrews, P Tammen, H Speicher, DW Hanash, SM AF Omenn, GS States, DJ Adamski, M Blackwell, TW Menon, R Hermjakob, H Apweiler, R Haab, BB Simpson, RJ Eddes, JS Kapp, EA Moritz, RL Chan, DW Rai, AJ Admon, A Aebersold, R Eng, J Hancock, WS Hefta, SA Meyer, H Paik, YK Yoo, JS Ping, PP Pounds, J Adkins, J Qian, XH Wang, R Wasinger, V Wu, CY Zhao, XH Zeng, R Archakov, A Tsugita, A Beer, I Pandey, A Pisano, M Andrews, P Tammen, H Speicher, DW Hanash, SM TI Overview of the HUPO Plasma Proteome Project: Results from the pilot phase with 35 collaborating laboratories and multiple analytical groups, generating a core dataset of 3020 proteins and a publicly-available database SO PROTEOMICS LA English DT Article DE database; HUPO Plasma Proteome Project; plasma; serum ID TANDEM MASS-SPECTROMETRY; HUMAN SERUM PROTEOME; SEQUENCE DATABASES; STATISTICAL-MODEL; SCALE PROTEOMICS; YEAST PROTEOME; SPECTRAL DATA; HUMAN GENOME; IDENTIFICATION; PEPTIDE AB HUPO initiated the Plasma Proteome Project (PPP) in 2002. Its pilot phase has (1) evaluated advantages and limitations of many depletion, fractionation, and MS technology platforms; (2) compared PPP reference specimens of human serum and EDTA, heparin, and citrate-anticoagulated plasma; and (3) created a publicly-available knowledge base (www.bioinformatics.med.umich.edu/hupo/ppp; www.ebi.ac.uk/pride). Thirty-five participating laboratories in 13 countries submitted datasets. Working groups addressed (a) specimen stability and protein concentrations; (b) protein identifications from 18 MS/MS datasets; (c) independent analyses from raw MS-MS spectra; (d) search engine performance, subproteome analyses, and biological insights; (e) antibody arrays; and (f) direct MS/SELDI analyses. MS-MS datasets had 15 710 different International Protein Index (IPI) protein IDs; our integration algorithm applied to multiple matches of peptide sequences yielded 9504 IPI proteins identified with one or more peptides and 3020 proteins identified with two or more peptides (the Core Dataset). These proteins have been characterized with Gene Ontology, InterPro, Novartis Atlas, OMIM, and immunoassay-based concentration determinations. The database permits examination of many other subsets, such as 1274 proteins identified with three or more peptides. Reverse protein to DNA matching identified proteins for 118 previously unidentified ORFs. We recommend use of plasma instead of serum, with EDTA (or citrate) for anticoagulation. To improve resolution, sensitivity and reproducibility of peptide identifications and protein matches, we recommend combinations of depletion, fractionation, and MS/MS technologies, with explicit criteria for evaluation of spectra, use of search algorithms, and integration of homologous protein matches. This Special Issue of PROTEOMICS presents papers integral to the collaborative analysis plus many reports of supplementary work on various aspects of the PPP workplan. These PPP results on complexity, dynamic range, incomplete sampling, false-positive matches, and integration of diverse datasets for plasma and serum proteins lay a foundation for development and validation of circulating protein biomarkers in health and disease. C1 Univ Michigan, Ann Arbor, MI 48109 USA. European Bioinformat Inst, Hinxton, England. Van Andel Res Inst, Grand Rapids, MI USA. Ludwig Inst Canc Res, Melbourne, Vic 3050, Australia. Johns Hopkins Univ, Baltimore, MD USA. Technion Israel Inst Technol, Haifa, Israel. Swiss Fed Inst Technol, ETH, Zurich, Switzerland. Inst Syst Biol, Seattle, WA USA. Northeastern Univ, Boston, MA 02115 USA. Ruhr Univ Bochum, D-4630 Bochum, Germany. Yonsei Res Ctr, Seoul, South Korea. Korea Basic Sci Inst, Seoul, South Korea. Univ Calif Los Angeles, Los Angeles, CA USA. Pacific NW Natl Lab, Richland, WA USA. Inst Radiat Med, Beijing, Peoples R China. CUNY Mt Sinai Sch Med, New York, NY 10029 USA. Univ New S Wales, Kensington, NSW 2033, Australia. Chinese Acad Med Sci, Beijing 100037, Peoples R China. Shanghai Inst Biol Sci, Shanghai, Peoples R China. Inst Biomed Chem, Moscow, Russia. NEC Proteom Res Lab, Tsukuba, Ibaraki, Japan. IBM Corp, Haifa, Israel. Proteom Res Serv Inc, Ann Arbor, MI USA. BioVisioN AG, Hannover, Germany. Wistar Inst Anat & Biol, Philadelphia, PA 19104 USA. Fred Hutchinson Canc Res Ctr, Seattle, WA 98104 USA. RP Omenn, GS (reprint author), Univ Michigan, MSRB 1,1150 W Med Ctr Dr, Ann Arbor, MI 48109 USA. EM gomenn@umich.edu RI Pandey, Akhilesh/B-4127-2009; Eddes, James/F-1670-2011; Archakov, Alexander/B-5194-2012; Eng, Jimmy/I-4202-2012; Adkins, Joshua/B-9881-2013; Wang, Rong/A-8721-2009; Eng, Jimmy/C-6556-2017; OI Ping, Peipei/0000-0003-3583-3881; Hermjakob, Henning/0000-0001-8479-0262; Pandey, Akhilesh/0000-0001-9943-6127; Eng, Jimmy/0000-0001-6352-6737; Adkins, Joshua/0000-0003-0399-0700; Eng, Jimmy/0000-0001-6352-6737; Apweiler, Rolf/0000-0001-7078-200X; Omenn, Gilbert S./0000-0002-8976-6074; Andrews, Philip/0000-0001-6843-5420; Pounds, Joel/0000-0002-6616-1566 FU PHS HHS [84942] NR 62 TC 532 Z9 569 U1 2 U2 74 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1615-9853 J9 PROTEOMICS JI Proteomics PD AUG PY 2005 VL 5 IS 13 BP 3226 EP 3245 DI 10.1002/pmic.200500358 PG 20 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 958VZ UT WOS:000231477600002 PM 16104056 ER PT J AU Haab, BB Geierstanger, BH Michailidis, G Vitzthum, F Forrester, S Okon, R Saviranta, P Brinker, A Sorette, M Perlee, L Suresh, S Drwal, G Adkins, JN Omenn, GS AF Haab, BB Geierstanger, BH Michailidis, G Vitzthum, F Forrester, S Okon, R Saviranta, P Brinker, A Sorette, M Perlee, L Suresh, S Drwal, G Adkins, JN Omenn, GS TI Immunoassay and antibody microarray analysis of the HUPO Plasma Proteome Project reference specimens: Systematic variation between sample types and calibration of mass spectrometry data SO PROTEOMICS LA English DT Article DE antibody microarrays; anticoagulants; immunoassays; plasma proteome ID SCATTERING SUBMICROSCOPIC PARTICLES; HIGHLY FLUORESCENT ANALOGS; BIOLOGICAL APPLICATIONS; TRACER LABELS; PROTEINS; SERUM; AMPLIFICATION; HEMOGLOBIN; PLATFORM; FORMAT AB Four different immunoassay and antibody microarray methods performed at four different sites were used to measure the levels of a broad range of proteins (N = 323 assays; 39, 88, 168, and 28 assays at the respective sites; 237 unique analytes) in the human serum and plasma reference specimens distributed by the Plasma Proteome Project (PPP) of the HUPO. The methods provided a means to (1) assess the level of systematic variation in protein abundances associated with blood preparation methods (serum, citrate-anticoagulated-plasma, EDTA-anticoagulated-plasma, or heparin-anticoagulated-plasma) and (2) evaluate the dependence on concentration of MS-based protein identifications from data sets using the HUPO specimens. Some proteins, particularly cytokines, had highly variable concentrations between the different sample preparations, suggesting specific effects of certain anticoagulants on the stability or availability of these proteins. The linkage of antibody-based measurements from 66 different analytes with the combined MS/MS data from 18 different laboratories showed that protein detection and the quality of MS data increased with analyte concentration. The conclusions from these initial analyses are that the optimal blood preparation method is variable between analytes and that the discovery of blood proteins by MS can be extended to concentrations below the ng/mL range under certain circumstances. Continued developments in antibody-based methods will further advance the scientific goals of the PPP. C1 Van Andel Res Inst, Grand Rapids, MI 49503 USA. Novartis Res Fdn, Genom Inst, San Diego, CA USA. Univ Michigan, Dept Stat, Ann Arbor, MI 48109 USA. Dade Behring Marburg GmbH, Marburg, Germany. Mol Staging, New Haven, CT USA. Int Tech Pk, Inst Bioinformat, Bangalore, Karnataka, India. Ohio State Univ, Sch Biomed Sci, Columbus, OH 43210 USA. Pacific NW Natl Lab, Richland, WA USA. Univ Michigan, Sch Med, Ann Arbor, MI USA. RP Haab, BB (reprint author), Van Andel Res Inst, 333 Bostwick NE, Grand Rapids, MI 49503 USA. EM brian.haab@vai.org RI Adkins, Joshua/B-9881-2013; OI Adkins, Joshua/0000-0003-0399-0700; Omenn, Gilbert S./0000-0002-8976-6074 FU NCPDCID CDC HHS [NCI-84982]; NCRR NIH HHS [1P41RR018627-01] NR 28 TC 107 Z9 113 U1 3 U2 6 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1615-9853 J9 PROTEOMICS JI Proteomics PD AUG PY 2005 VL 5 IS 13 BP 3278 EP 3291 DI 10.1002/pmic.200401276 PG 14 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 958VZ UT WOS:000231477600005 PM 16038022 ER PT J AU Adkins, JN Monroe, ME Auberry, KJ Shen, YF Jacobs, JM Camp, DG Vitzthum, F Rodland, KD Zangar, RC Smith, RD Pounds, JG AF Adkins, JN Monroe, ME Auberry, KJ Shen, YF Jacobs, JM Camp, DG Vitzthum, F Rodland, KD Zangar, RC Smith, RD Pounds, JG TI A proteomic study of the HUPO Plasma Proteome Project's pilot samples using an accurate mass and time tag strategy SO PROTEOMICS LA English DT Article DE blood; cluster analysis; HUPO; cLC-FT-ICR MS; mass spectrometry; plasma; serum ID HUMAN SERUM PROTEOME; HUMAN GROWTH-HORMONE; PEPTIDE IDENTIFICATION; STATISTICAL-MODEL; 2-DIMENSIONAL ELECTROPHORESIS; PLATELET PROTEOME; YEAST PROTEOME; SPECTROMETRY; PROTEINS; TECHNOLOGY AB Characterization of the human blood plasma proteome is critical to the discovery of routinely useful clinical biomarkers. We used an accurate mass and time (AMT) tag strategy with high-resolution mass accuracy cLC-FT-ICR MS to perform a global proteomic analysis of pilot study samples as part of the HUPO Plasma Proteome Project. HUPO reference serum and citrated plasma samples from African Americans, Asian Americans, and Caucasian Americans were analyzed, in addition to a Pacific Northwest National Laboratory reference serum and plasma. The AMT tag strategy allowed us to leverage two previously published "shotgun" proteomics experiments to perform global analyses on these samples in triplicate in less than 4 days total analysis time. A total of 722 (22% with multiple peptide identifications) International Protein Index redundant proteins, or 377 protein families by ProteinProphet, were identified over the six individual HUPO serum and plasma samples. The samples yielded a similar number of identified redundant proteins in the plasma samples (average 446 +/- 23) as found in the serum samples (average 440 +/- 20). These proteins were identified by an average of 956 35 unique peptides in plasma and 930 +/- 11 unique peptides in serum. In addition to this high-throughput analysis, the AMT tag approach was used with a Z-score normalization to compare relative protein abundances. This analysis highlighted both known differences in serum and citrated plasma such as fibrinogens, and reproducible differences in peptide abundances from proteins such as soluble activin receptor-like kinase 7b and glycoprotein m6b. The AMT tag strategy not only improved our sample throughput but also provided a basis for estimated quantitation. C1 Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. Dade Behring Marburg GmbH, Marburg, Germany. RP Pounds, JG (reprint author), Pacific NW Natl Lab, Div Biol Sci, Box 999,MSIN P7-58, Richland, WA 99352 USA. EM joel.pounds@pnl.gov RI Smith, Richard/J-3664-2012; Adkins, Joshua/B-9881-2013; OI Smith, Richard/0000-0002-2381-2349; Adkins, Joshua/0000-0003-0399-0700; Pounds, Joel/0000-0002-6616-1566 FU NCI NIH HHS [CA78722]; NCRR NIH HHS [P41 RR018522, RR18522] NR 54 TC 45 Z9 50 U1 0 U2 3 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1615-9853 J9 PROTEOMICS JI Proteomics PD AUG PY 2005 VL 5 IS 13 BP 3454 EP 3466 DI 10.1002/pmic.200401333 PG 13 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 958VZ UT WOS:000231477600020 PM 16052625 ER PT J AU Kapp, EA Schutz, F Connolly, LM Chakel, JA Meza, JE Miller, CA Fenyo, D Eng, JK Adkins, JN Omenn, GS Simpson, RJ AF Kapp, EA Schutz, F Connolly, LM Chakel, JA Meza, JE Miller, CA Fenyo, D Eng, JK Adkins, JN Omenn, GS Simpson, RJ TI An evaluation, comparison, and accurate benchmarking of several publicly available MS/MS search algorithms: Sensitivity and specificity analysis SO PROTEOMICS LA English DT Article DE MASCOT; mass spectrometry; PeptideProphet; SEQUEST; sonar; spectrum mill; X!Tandem ID TANDEM MASS-SPECTROMETRY; LARGE-SCALE PROTEOMICS; HUMAN PLASMA PROTEOME; STATISTICAL-MODEL; YEAST PROTEOME; DATABASE; IDENTIFICATION; PROTEINS; PEPTIDE; SPECTRA AB MS/MS and associated database search algorithms are essential proteomic tools for identifying peptides. Due to their widespread use, it is now time to perform a systematic analysis of the various algorithms currently in use. Using blood specimens used in the HUPO Plasma Proteome Project, we have evaluated five search algorithms with respect to their sensitivity and specificity, and have also accurately benchmarked them based on specified false-positive (FP) rates. Spectrum Mill and SEQUEST performed well in terms of sensitivity, but were inferior to MASCOT, X!Tandem, and Sonar in terms of specificity. Overall, MASCOT, a probabilistic search algorithm, correctly identified most peptides based on a specified FP rate. The rescoring algorithm, PeptideProphet, enhanced the overall performance of the SEQUEST algorithm, as well as provided predictable FP error rates. Ideally, score thresholds should be calculated for each peptide spectrum or minimally, derived from a reversed-sequence search as demonstrated in this study based on a validated data set. The availability of open-source search algorithms, such as X!Tandem, makes it feasible to further improve the validation process (manual or automatic) on the basis of "consensus scoring", i.e., the use of multiple (at least two) search algorithms to reduce the number of FPs. C1 Ludwig Inst Canc Res, Joint Prot Lab, Melbourne Branch, Walter & Eliza Hall Inst Med Res, Parkville, Vic, Australia. Agilent Technol, Santa Clara, CA USA. GE Healthcare, Piscataway, NJ USA. Inst Syst Biol, Seattle, WA USA. Pacific NW Natl Lab, Richland, WA USA. Univ Michigan, Sch Med, Ann Arbor, MI USA. RP Simpson, RJ (reprint author), Royal Melbourne Hosp, Joint Prot Lab, Ludwig Inst Canc Res, POB 2008, Parkville, Vic 3050, Australia. EM richard.simpson@ludwig.edu.au RI Eng, Jimmy/I-4202-2012; Adkins, Joshua/B-9881-2013; Eng, Jimmy/C-6556-2017; OI Eng, Jimmy/0000-0001-6352-6737; Adkins, Joshua/0000-0003-0399-0700; Eng, Jimmy/0000-0001-6352-6737; Omenn, Gilbert S./0000-0002-8976-6074; Fenyo, David/0000-0001-5049-3825 NR 41 TC 249 Z9 259 U1 0 U2 21 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1615-9853 J9 PROTEOMICS JI Proteomics PD AUG PY 2005 VL 5 IS 13 BP 3475 EP 3490 DI 10.1002/pmic.200500126 PG 16 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 958VZ UT WOS:000231477600022 PM 16047398 ER PT J AU Steinbring, E Faber, SM Macintosh, BA Gavel, D Gates, EL AF Steinbring, E Faber, SM Macintosh, BA Gavel, D Gates, EL TI Characterizing the adaptive optics off-axis point-spread function. II. Methods for use in laser guide star observations SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC LA English DT Article ID SYSTEM; PERFORMANCE; DESIGN AB Most current astronomical adaptive optics (AO) systems rely on the availability of a bright star to measure the distortion of the incoming wave front. Replacing the guide star with an artificial laser beacon alleviates this dependency on bright stars and therefore increases sky coverage, but it does not eliminate another serious problem for AO observations. This is the issue of PSF variation with time and field position near the guide star. In fact, because a natural guide star is still necessary for correction of the low-order phase error, characterization of laser guide star ( LGS) AO PSF spatial variation is more complicated than for a natural guide star alone. We discuss six methods for characterizing LGS AO PSF variation that can potentially improve the determination of the PSF away from the laser spot; that is, off-axis. Calibration images of dense star fields are used to determine the change in PSF variation with field position. This is augmented by AO system telemetry and simple computer simulations to determine a more accurate off-axis PSF. We report on tests of the methods using the laser AO system on the Lick Observatory Shane Telescope. We observed with offsets typical of separations between dim science targets and the nearest suitably bright tip-tilt guide star, up to 20 ''. If the tip-tilt guide star is used as the PSF reference, the predicted Strehl ratio within an 8 '' radius of the LGS can be more than a factor of 2 too high, as it does not take into account the field-dependent anisoplanatism. A better result may be obtained by an improved empirical approach: repositioning the tip-tilt guide star to compensate for the additional 8 '' offset. This would result in a 27% relative error in Strehl ratio. A simple Gaussian model of PSF variation can reduce the error in the prediction to similar to 20%. Some further improvement may be obtained semianalytically by using telemetry from the AO system (14% error) plus a more sophisticated theoretical model of PSF variation (13% error). It should be noted, however, that all but the first method achieve comparable accuracy in predicting PSF FWHM. This is important because the last method, unlike the others, is not directly applicable to 10 m apertures without further computational complexity. C1 Natl Res Council Canada, Herzberg Inst Astrophys, Ctr Adapt Opt, Victoria, BC V9E 2E7, Canada. Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, Ctr Adapt Opt, Santa Cruz, CA 95064 USA. Lawrence Livermore Natl Lab, Ctr Adapt Opt, Livermore, CA 94551 USA. Univ Calif Santa Cruz, Lick Observ, Ctr Adapt Opt, Mt Hamilton, CA 95140 USA. RP Steinbring, E (reprint author), Natl Res Council Canada, Herzberg Inst Astrophys, Ctr Adapt Opt, Victoria, BC V9E 2E7, Canada. OI Steinbring, Eric/0000-0003-1259-0813 NR 14 TC 10 Z9 10 U1 0 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6280 J9 PUBL ASTRON SOC PAC JI Publ. Astron. Soc. Pac. PD AUG PY 2005 VL 117 IS 834 BP 847 EP 859 DI 10.1086/431725 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 953WW UT WOS:000231113400007 ER PT J AU Hendrix, DK Brenner, SE Holbrook, SR AF Hendrix, Donna K. Brenner, Steven E. Holbrook, Stephen R. TI RNA structural motifs: building blocks of a modular biomolecule SO QUARTERLY REVIEWS OF BIOPHYSICS LA English DT Review ID PHENYLALANINE TRANSFER-RNA; LARGE RIBOSOMAL-SUBUNIT; UNUSUALLY STABLE RNA; SARCIN RICIN LOOP; CRYSTAL-STRUCTURE; ANGSTROM RESOLUTION; NUCLEIC-ACIDS; 3-DIMENSIONAL STRUCTURES; DISTINCTIVE FEATURES; STRUCTURE PREDICTION AB RNAs are modular biomolecules, composed largely of conserved structural subunits, or motifs. These structural motifs comprise the secondary structure of RNA and are knit together via tertiary interactions into a compact, functional, three-dimensional structure and are to be distinguished from motifs defined by sequence or function. A relatively small number of structural motifs are found repeatedly in RNA hairpin and internal loops, and are observed to be composed of a limited number of common 'structural elements'. In addition to secondary and tertiary structure motifs, there are functional motifs specific for certain biological roles and binding motifs that serve to complex metals or other ligands. Research is continuing into the identification and classification of RNA structural motifs and is being initiated to predict motifs from sequence, to trace their phylogenetic relationships and to use them as building blocks in RNA engineering. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biol Div, Dept Biol Struct, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720 USA. RP Holbrook, SR (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biol Div, Dept Biol Struct, MS 64R0121, Berkeley, CA 94720 USA. EM srholbrook@lbl.gov RI Brenner, Steven/A-8729-2008 OI Brenner, Steven/0000-0001-7559-6185 FU NHGRI NIH HHS [1R01HG002665, K22 HG00056]; NIGMS NIH HHS [1R01GM66199] NR 125 TC 88 Z9 91 U1 1 U2 14 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA SN 0033-5835 J9 Q REV BIOPHYS JI Q. Rev. Biophys. PD AUG PY 2005 VL 38 IS 3 BP 221 EP 243 DI 10.1017/S0033583506004215 PG 23 WC Biophysics SC Biophysics GA 091ED UT WOS:000241008300001 PM 16817983 ER PT J AU Leggett, RW Eckerman, KE Khokhryakov, VE Suslova, KG Krahenbuhl, MP Miller, SC AF Leggett, RW Eckerman, KE Khokhryakov, VE Suslova, KG Krahenbuhl, MP Miller, SC TI Mayak worker study: An improved doses from internally biokinetic model for reconstructing deposited plutonium SO RADIATION RESEARCH LA English DT Article ID TRANS-URANIUM REGISTRY; UNITED-STATES; PRODUCTION-ASSOCIATION; URINARY-EXCRETION; CANCER-MORTALITY; LUNG-CANCER; LIVER; METABOLISM; AMERICIUM; RETENTION AB The plutonium production facility known as the Mayak Production Association was put into operation in June 1948. A high incidence of cancer in the Mayak workers has been related to the level of exposure to plutonium, but uncertainties in tissue doses have hampered development of dose-risk relationships. As part of an effort to improve dose estimates for these workers, the systemic biokinetic model for plutonium currently recommended by the International Commission on Radiological Protection (ICRP) has been modified to reflect recently developed data and facilitate interpretation of casespecific information. This paper describes the proposed model and discusses its implications for dose reconstruction for the Mayak workers. (c) 2005 by Radiation Research Society. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Utah, Div Radiobiol, Salt Lake City, UT 84108 USA. RP Leggett, RW (reprint author), Oak Ridge Natl Lab, 1060 Commerce Pk, Oak Ridge, TN 37831 USA. EM rwl@ornl.gov NR 51 TC 63 Z9 63 U1 0 U2 6 PU RADIATION RESEARCH SOC PI LAWRENCE PA 810 E TENTH STREET, LAWRENCE, KS 66044 USA SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD AUG PY 2005 VL 164 IS 2 BP 111 EP 122 DI 10.1667/RR3371 PG 12 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA 949OR UT WOS:000230798500001 PM 16038582 ER PT J AU Semenenko, VA Stewart, RD Ackerman, EJ AF Semenenko, VA Stewart, RD Ackerman, EJ TI Monte Carlo simulation of base and nucleotide excision repair of clustered DNA damage sites. I. Model properties and predicted trends SO RADIATION RESEARCH LA English DT Article ID DOUBLE-STRAND BREAKS; PURIFIED HUMAN PROTEINS; MAMMALIAN-CELLS; IONIZING-RADIATION; POLYMERASE-BETA; THYMINE GLYCOL; ESCHERICHIA-COLI; OXIDATIVE DAMAGE; SENSITIVE SITES; ABASIC SITES AB DNA is constantly damaged through endogenous processes and by exogenous agents, such as ionizing radiation. Base excision repair (BER) and nucleotide excision repair (NER) help maintain the stability of the genome by removing many different types of DNA damage. We present a Monte Carlo excision repair (MCER) model that simulates key steps in the short-patch and long-patch BER pathways and the NER pathway. The repair of both single and clustered damages, except double-strand breaks (DSBs), is simulated in the MCER model. Output from the model includes estimates of the probability that a cluster is repaired correctly, the fraction of the clusters converted into DSBs through the action of excision repair enzymes, the fraction of the clusters repaired with mutations, and the expected number of repair cycles needed to completely remove a clustered damage site. The quantitative implications of alternative hypotheses regarding the postulated repair mechanisms are investigated through a series of parameter sensitivity studies. These sensitivity studies are also used to help define the putative repair characteristics of clustered damage sites other than DSBs. (c) 2005 by Radiation Research Society. C1 Purdue Univ, Sch Hlth Sci, W Lafayette, IN 47907 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Stewart, RD (reprint author), Purdue Univ, Sch Hlth Sci, 550 Stadium Mall Dr, W Lafayette, IN 47907 USA. EM trebor@purdue.edu RI Stewart, Rob/A-2511-2009; Stewart, Robert/A-3609-2013 OI Stewart, Robert/0000-0001-5946-0595 NR 84 TC 31 Z9 33 U1 0 U2 4 PU RADIATION RESEARCH SOC PI LAWRENCE PA 810 E TENTH STREET, LAWRENCE, KS 66044 USA SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD AUG PY 2005 VL 164 IS 2 BP 180 EP 193 DI 10.1667/RR3402 PG 14 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA 949OR UT WOS:000230798500009 PM 16038589 ER PT J AU Wignall, GD Melnichenko, YB AF Wignall, GD Melnichenko, YB TI Recent applications of small-angle neutron scattering in strongly interacting soft condensed matter SO REPORTS ON PROGRESS IN PHYSICS LA English DT Review ID SUPERCRITICAL CARBON-DIOXIDE; X-RAY-SCATTERING; LOW-DENSITY POLYETHYLENE; POLYSTYRENE POLYVINYL METHYL-ETHER); LIQUID PHASE-SEPARATION; BINARY POLYMER BLENDS; DIFFERENTIAL SCANNING CALORIMETRY; CHARGED POLYELECTROLYTE SOLUTIONS; CHAIN-BRANCHED POLYETHYLENES; DYNAMIC LIGHT-SCATTERING AB Before the application of small-angle neutron scattering (SANS) to the study of polymer structure, chain conformation studies were limited to light and small-angle x-ray scattering techniques, usually conducted in dilute solution owing to the difficulties of separating the inter- and intrachain contributions to the structure. The unique role of neutron scattering in soft condensed matter arises from the difference in the coherent scattering length between deuterium (b(D) = 0.67 x 10(-12) cm) and hydrogen (b(H) = -0.37 x 10(-12) cm), which results in a marked difference in scattering power (contrast) between molecules synthesized from normal (hydrogeneous) and deuterated monomer units. Thus, deuterium labelling techniques may be used to 'stain' molecules and make them 'visible' in the condensed state and other crowded environments, such as concentrated solutions of overlapping chains. For over two decades, SANS has proved to be a powerful tool for studies of structure-property relationships in polymeric systems and has made it possible to extract unique information about their size, shape, conformational changes and molecular associations. These applications are now so numerous that an exhaustive review of the field is no longer practical, so the authors propose to focus on the use of SANS for studies of strongly interacting soft matter systems. This paper will therefore discuss basic theory and practical aspects of the technique and will attempt to explain the physics of scattering with the minimum of unnecessary detail and mathematical rigour. Examples will be given to demonstrate the power of SANS and to show how it has helped to unveil universal aspects of the behaviour of macromolecules in such apparently diverse systems as polymer solutions, blends, polyelectrolytes and supercritical mixtures. The aim of the authors is to aid potential users who have a general scientific background, but no specialist knowledge of scattering, to understand the potential of the technique and, if they so choose, to apply it to provide new information in areas of their own particular research interests. C1 Oak Ridge Natl Lab, Ctr Neutron Scattering, Oak Ridge, TN 37831 USA. RP Wignall, GD (reprint author), Oak Ridge Natl Lab, Ctr Neutron Scattering, POB 2008, Oak Ridge, TN 37831 USA. OI Wignall, George/0000-0002-3876-3244 NR 222 TC 54 Z9 55 U1 3 U2 35 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0034-4885 J9 REP PROG PHYS JI Rep. Prog. Phys. PD AUG PY 2005 VL 68 IS 8 BP 1761 EP 1810 DI 10.1088/0034-4885/68/8/R02 PG 50 WC Physics, Multidisciplinary SC Physics GA 960FS UT WOS:000231576200002 ER PT J AU Saripalli, KP Brown, CF Lindberg, MJ AF Saripalli, KP Brown, CF Lindberg, MJ TI Development of cellular absorptive tracers for quantitative characterization of microbial mass in flow systems SO RESEARCH IN MICROBIOLOGY LA English DT Article DE cellular absorptive tracer; flow system; bacterial mass; quantitative characterization AB We report a new cellular absorptive tracer (CAT) method for simple, nondestructive characterization of bacterial mass in flow systems. Results show that adsorption of a CAT molecule into the cellular mass results in its slowdown during flow, which is an accurate quantitative measurement of biomass quantity and distribution. No such methods are currently available for quantitative characterization of cell mass. (c) 2005 Elsevier SAS. All rights reserved. C1 Battelle Pacific NW Natl Lab, Richland, WA 99352 USA. RP Saripalli, KP (reprint author), Battelle Pacific NW Natl Lab, 1318 Sigma V,K6-81, Richland, WA 99352 USA. EM prasad.saripalli@pnl.gov NR 6 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0923-2508 J9 RES MICROBIOL JI Res. Microbiol. PD AUG PY 2005 VL 156 IS 7 BP 790 EP 792 DI 10.1016/j.resmic.2005.03.012 PG 3 WC Microbiology SC Microbiology GA 967NN UT WOS:000232098000003 PM 16125906 ER PT J AU Arenholz, E Prestemon, SO AF Arenholz, E Prestemon, SO TI Design and performance of an eight-pole resistive magnet for soft x-ray magnetic dichroism measurements SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID CIRCULAR-DICHROISM; ABSORPTION; PROBE; IRON AB To take full advantage of the strengths of soft x-ray magnetic dichroism (XMD) measurements for the detailed and quantitative characterization of multielement magnetic materials, we developed an eight-pole electromagnet that provides magnetic fields up to 0.9 T in any direction relative to the incoming x-ray beam. The setup allows us to measure magnetic circular and linear dichroism spectra as well as to thoroughly study magnetization reversal processes with very high precision. Design constraints and system optimization for maximum peak field are discussed. The predicted current-field relation is in excellent agreement with experimental findings. A brief discussion of the key technical difficulties in developing a similar superconducting device with peak fields of 5 T and ramping rates suitable for point-by-point full-field reversal in an XMD experiment is presented. (c) 2005 American Institute of Physics. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Engn, Berkeley, CA 94720 USA. RP Arenholz, E (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Engn, Berkeley, CA 94720 USA. EM earenholz@lbl.gov NR 23 TC 55 Z9 55 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 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD AUG PY 2005 VL 76 IS 8 AR 083908 DI 10.1063/1.2008027 PG 8 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 956CN UT WOS:000231276600044 ER PT J AU Chen, EF Wen, YX Lewis, JW Goldbeck, RA Kliger, DS Strauss, CEM AF Chen, EF Wen, YX Lewis, JW Goldbeck, RA Kliger, DS Strauss, CEM TI Nanosecond laser temperature-jump optical rotatory dispersion: Application to early events in protein folding/unfolding SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID RESOLVED CIRCULAR-DICHROISM; MILLISECOND TIME RESOLUTION; RIBONUCLEASE-A; NONDENATURING ENVIRONMENT; SPECTRAL MEASUREMENTS; ELECTRON-TRANSFER; CYTOCHROME-C; SPECTROSCOPY; RELAXATION; PHOTOLYSIS AB Nanosecond time-resolved optical rotatory dispersion (TRORD) techniques are coupled with laser temperature-jump (T-jump) triggering in an instrument that measures ultrafast protein folding-unfolding dynamics with high specificity to secondary structure. Far-ultraviolet (UV) ORD can be measured with this instrument over a wide wavelength range at times as early as 35 ns after a 3 ns laser T-jump pulse. The fundamental of a Nd:YAG laser is passed through a D-2-filled Raman shifter to generate a pulse of 1.5 mu m infrared (IR) light that is efficiently absorbed by water. The resulting T-jump is stable for at least 1 ms before decaying back to the starting temperature with a time constant of similar to 30 ms. The ability to measure entire TRORD band shapes during this temporal window makes it possible to distinguish between changes in the signal due to a genuine unfolding or refolding process and changes due to artifacts. The technique, applicable to a wide variety of proteins, is demonstrated here in submillisecond unfolding studies of RNAse A and cytochrome c. (c) 2005 American Institute of Physics. C1 Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95064 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Chen, EF (reprint author), Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95064 USA. EM chen@chemistry.ucsc.edu NR 42 TC 12 Z9 12 U1 0 U2 12 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD AUG PY 2005 VL 76 IS 8 AR 083120 DI 10.1063/1.2009847 PG 7 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 956CN UT WOS:000231276600021 ER PT J AU Gushenets, VI Bugaev, AS Oks, EM Hershcovitch, A Johnson, BM Kulevoy, TV Poole, HJ Svarovsky, AY AF Gushenets, VI Bugaev, AS Oks, EM Hershcovitch, A Johnson, BM Kulevoy, TV Poole, HJ Svarovsky, AY TI Enhanced beam currents of P2+, P3+, and P4+ for use in semiconductor ion implanters SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID IMPLANTATION AB Considerably enhanced yields of P2+ (8.6 pmA), P3+ (1.9 pmA), and P4+ (0.12 pmA) were obtained using a modified Bernas-Calutron ion source. The source design, experimental layout, and results of extensive optimization studies are described. The improved production of multiply charged ions is of particular interest for applications in semiconductor ion implantation facilities. (c) 2005 American Institute of Physics. C1 Russian Acad Sci, Inst High Current Elect, Tomsk 634055, Russia. Brookhaven Natl Lab, Upton, NY 11973 USA. Inst Theoet & Expt Phys, Moscow 117218, Russia. PVI, Oxnard, CA 93031 USA. AA Bochvara Sci Res Inst Inorgan Mat, Siberian Div, Russian Natl Res Ctr, Seversk 636070, Russia. RP Gushenets, VI (reprint author), Russian Acad Sci, Inst High Current Elect, Tomsk 634055, Russia. EM brant@bnl.gov RI Oks, Efim/A-9409-2014; OI Oks, Efim/0000-0002-9323-0686; Yushkov, Georgy/0000-0002-7615-6058 NR 17 TC 4 Z9 4 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD AUG PY 2005 VL 76 IS 8 AR 083301 DI 10.1063/1.1988181 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 956CN UT WOS:000231276600022 ER PT J AU Peele, AG De Carlo, F McMahon, PJ Dhal, BB Nugent, KA AF Peele, AG De Carlo, F McMahon, PJ Dhal, BB Nugent, KA TI X-ray phase contrast tomography with a bending magnet source SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID ADVANCED-PHOTON-SOURCE; SYNCHROTRON-RADIATION; MICROSCOPY; BEAMLINE; MICROTOMOGRAPHY; LITHOGRAPHY; ATTENUATION; TABULATION; RESOLUTION; RETRIEVAL AB X-ray radiography and x-ray tomography are important tools for noninvasive characterization of materials. Historically, the contrast mechanism used with these techniques has been absorption. However, for any given sample there are x-ray energies for which absorption contrast is poor. Alternatively, when good contrast can be obtained, radiation damage from an excessive dose may become an issue. Consequently, phase-contrast methods have in recent years been implemented at both synchrotron and laboratory facilities. A range of radiographic and tomographic demonstrations have now been made, typically utilizing the coherent flux from an insertion device at a synchrotron or a microfocus laboratory source. In this paper we demonstrate that useful results may be obtained using a bending magnet source at a synchrotron. In particular we show that the same beamline can be used to make and characterize a sample made by x-ray lithographic methods. (c) 2005 American Institute of Physics. C1 La Trobe Univ, Dept Phys, Bundoora, Vic 3086, Australia. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia. RP Peele, AG (reprint author), La Trobe Univ, Dept Phys, Bundoora, Vic 3086, Australia. RI Nugent, Keith/J-2699-2012; Nugent, Keith/I-4154-2016 OI Nugent, Keith/0000-0003-1522-8991; Nugent, Keith/0000-0002-4281-3478 NR 38 TC 23 Z9 23 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 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD AUG PY 2005 VL 76 IS 8 AR 083707 DI 10.1063/1.2005447 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 956CN UT WOS:000231276600032 ER PT J AU Barnard, A Saponjic, Z Tiede, D Rajh, T Curtiss, L AF Barnard, A Saponjic, Z Tiede, D Rajh, T Curtiss, L TI Multi-scale modeling of titanium dioxide: Controlling shape with surface chemistry SO REVIEWS ON ADVANCED MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT 2nd International Conference on Nanomaterials and Nanotechnologies CY JUN 14-18, 2005 CL Crete, GREECE ID GEL-SOL METHOD; ANATASE TIO2 NANOPARTICLES; CHARGE SEPARATION; SIZE; NANOCRYSTALS; PARTICLES; ADSORPTION AB An important aspect in the use of titanium dioxide at the nanoscale for advanced photochemical applications is the controlled manipulation of the size, phase and morphology of the nanoparticles in solution. Solution pH is often used to alter such properties at the nanoscale. We have used a multi-scale thermodynamic model to investigate the effects of pH on the shape and phase stability of titanium dioxide nanoparticles. As input for the model, surface energies and surface tension of low index stoichiometric surfaces of anatase and rutile under hydrogen rich and hydrogen poor conditions have been calculated using density functional theory. Our results show how the anatase phase is stabilized in acidic solution while the rutile phase is stabilized in alkaline solution, and that pH may also be used to induce structural and phase transitions. C1 Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA. Argonne Natl Lab, Div Sci Mat, Argonne, IL 60439 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Barnard, A (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA. EM amanda.barnard@anl.gov RI Barnard, Amanda/A-7340-2011 OI Barnard, Amanda/0000-0002-4784-2382 NR 32 TC 15 Z9 15 U1 0 U2 14 PU INST PROBLEMS MECHANICAL ENGINEERING-RUSSIAN ACADEMY SCIENCES PI ST PTERSBURG PA BOLSHOJ 61, VAS OSTROV, ST PTERSBURG, 199178, RUSSIA SN 1606-5131 J9 REV ADV MATER SCI JI Rev. Adv. Mater. Sci. PD AUG PY 2005 VL 10 IS 1 BP 21 EP 27 PG 7 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary SC Science & Technology - Other Topics; Materials Science GA 955VP UT WOS:000231256000004 ER PT J AU Helton, JC Oberkampf, WL Johnson, JD AF Helton, JC Oberkampf, WL Johnson, JD TI Competing failure risk analysis using evidence theory SO RISK ANALYSIS LA English DT Article DE aleatory uncertainty; competing failure; epistemic uncertainty; evidence theory; Monte Carlo; risk analysis; strong link; weak link ID COMPLEX-SYSTEMS; SENSITIVITY ANALYSIS; UNCERTAINTY; PROBABILITY; VARIABILITY; ASSESSMENTS; PERFORMANCE; DESIGN; RULES; PROPAGATION AB Safety systems are important components of high-consequence systems that are intended to prevent the unintended operation of the system and thus the potentially significant negative consequences that could result from such an operation. This presentation investigates and illustrates formal procedures for assessing the uncertainty in the probability that a safety system will fail to operate as intended in an accident environment. Probability theory and evidence theory are introduced as possible mathematical structures for the representation of the epistemic uncertainty associated with the performance of safety systems, and a representation of this type is illustrated with a hypothetical safety system involving one weak link and one strong link that is exposed to a high temperature fire environment. Topics considered include (1) the nature of diffuse uncertainty information involving a system and its environment, (2) the conversion of diffuse uncertainty information into the mathematical structures associated with probability theory and evidence theory, and (3) the propagation of these uncertainty structures through a model for a safety system to obtain representations in the context of probability theory and evidence theory of the uncertainty in the probability that the safety system will fail to operate as intended. The results suggest that evidence theory provides a potentially valuable representational tool for the display of the implications of significant epistemic uncertainty in inputs to complex analyses. C1 Sandia Natl Labs, Validat & Uncertainty Quantificat Dept, Albuquerque, NM 87185 USA. Arizona State Univ, Dept Math & Stat, Tempe, AZ 85287 USA. ProStat, Mesa, AZ 85204 USA. RP Helton, JC (reprint author), Sandia Natl Labs, Dept 6874, MS 0779, Albuquerque, NM 87185 USA. EM jchelto@sandia.gov NR 86 TC 13 Z9 13 U1 0 U2 4 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0272-4332 J9 RISK ANAL JI Risk Anal. PD AUG PY 2005 VL 25 IS 4 BP 973 EP 995 DI 10.1111/j.1539-6924.2005.00644.x PG 23 WC Public, Environmental & Occupational Health; Mathematics, Interdisciplinary Applications; Social Sciences, Mathematical Methods SC Public, Environmental & Occupational Health; Mathematics; Mathematical Methods In Social Sciences GA 977AJ UT WOS:000232774500017 PM 16268945 ER PT J AU Rechard, RP Tierney, MS AF Rechard, RP Tierney, MS TI Improbability of igneous intrusion promoting a critical event in spent nuclear fuel disposed in unsaturated tuff SO RISK ANALYSIS LA English DT Review DE igneous intrusive event; nuclear critical event; nuclear waste repository; performance assessment; radioactive waste disposal; risk assessment; Yucca Mountain Project ID RADIOACTIVE-WASTE REPOSITORY; NATURAL FISSION REACTOR; ISOLATION PILOT-PLANT; YUCCA MOUNTAIN; BASALTIC VOLCANISM; SOUTHERN NEVADA; PERFORMANCE; CONSTRAINTS; URANIUM; GABON AB In their regulations, the U.S. Environmental Protection Agency and the U.S. Nuclear Regulatory Commission permit the omission of features, events, or processes with probabilities of < 10(-4) in 10(4) yr (e.g., a constant frequency of < 10(-8) per yr) in assessments of the performance of radioactive waste disposal systems. Igneous intrusion (or "volcanism") of a geologic repository at Yucca Mountain for radioactive waste is one disruptive event that has a probability with a range of uncertainty that straddles this regulatory criterion and is considered directly in performance assessment calculations. A self-sustained nuclear chain reaction (or "criticality") is another potentially disruptive event to consider, although it was never found to be important when evaluating the efficacy of radioactive waste disposal since the early 1970s. The thesis of this article is that the consideration of the joint event-volcanism and criticality-occurring in any 10,000-year period following closure can be eliminated from performance calculations at Yucca Mountain. The probability of the joint event must be less than the fairly well-accepted but low probability of volcanism. Furthermore, volcanism does not "remove" or "fail" existing hydrologic or geochemical constraints at Yucca Mountain that tend to prevent concentration of fissile material. Prior to general corrosion failure of waste packages, the mean release of fissile mass caused by a low-probability, igneous intrusive event is so small that the probability of a critical event is remote, even for highly enriched spent nuclear fuel owned by the U.S. Department of Energy. After widespread failure of packages occurs, the probability of the joint event is less than the probability of criticality because of the very small influence of volcanism on the mean fissile mass release. Hence, volcanism plays an insignificant role in inducing criticality over any 10(4)-yr period. We also argue that the Oklo reactors serve as a natural analogue and provide a rough bound on probability of criticality given favorable hydrologic or geochemical conditions on the scale of the repository that is less than 0.10. Because the product of this bound with the probability of volcanism represents the probability of the joint event and the product is less than 10(-4) in 10(4) yr, consideration of the joint event can be eliminated from performance calculations. C1 Sandia Natl Labs, Performance Assessment Dept 6853, Albuquerque, NM 87185 USA. Plantae Res Associates, Santa Fe, NM 87505 USA. RP Rechard, RP (reprint author), Sandia Natl Labs, Performance Assessment Dept 6853, POB 5800, Albuquerque, NM 87185 USA. EM rprecha@sandia.gov NR 149 TC 7 Z9 7 U1 0 U2 10 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0272-4332 J9 RISK ANAL JI Risk Anal. PD AUG PY 2005 VL 25 IS 4 BP 997 EP 1028 DI 10.1111/j.1539-6924.2005.00653.x PG 32 WC Public, Environmental & Occupational Health; Mathematics, Interdisciplinary Applications; Social Sciences, Mathematical Methods SC Public, Environmental & Occupational Health; Mathematics; Mathematical Methods In Social Sciences GA 977AJ UT WOS:000232774500018 PM 16268946 ER PT J AU Boyack, KW Klavans, R Borner, K AF Boyack, KW Klavans, R Borner, K TI Mapping the backbone of science SO SCIENTOMETRICS LA English DT Article ID JOURNAL COCITATION ANALYSIS; SCIENTIFIC JOURNALS; SIMILARITY MEASURES; INFORMATION-THEORY; KNOWLEDGE DOMAINS; NEURAL-NETWORKS; MAPS; INDICATORS; MANAGEMENT; AREAS AB This paper presents a new map representing the structure of all of science, based on journal articles, including both the natural and social sciences. Similar to cartographic maps of our world, the map of science provides a bird's eye view of today's scientific landscape. It can be used to visually identify major areas of science, their size, similarity, and interconnectedness. In order to be useful, the map needs to be accurate on a local and on a global scale. While our recent work has focused on the former aspect,1 this paper summarizes results on how to achieve structural accuracy. Eight alternative measures of journal similarity were applied to a data set of 7,121 journals covering over 1 million documents in the combined Science Citation and Social Science Citation Indexes. For each journal similarity measure we generated two-dimensional spatial layouts using the force-directed graph layout tool, VxOrd. Next, mutual information values were calculated for each graph at different clustering levels to give a measure of structural accuracy for each map. The best co-citation and inter-citation maps according to local and structural accuracy were selected and are presented and characterized. These two maps are compared to establish robustness. The inter-citation map is then used to examine linkages between disciplines. Biochemistry appears as the most interdisciplinary discipline in science. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. SciTech Strategies Inc, Berwyn, PA USA. Indiana Univ, Sch Lib & Informat Sci, Bloomington, IN USA. RP Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM kboyack@sandia.gov OI Boyack, Kevin/0000-0001-7814-8951 NR 39 TC 317 Z9 323 U1 25 U2 237 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0138-9130 EI 1588-2861 J9 SCIENTOMETRICS JI Scientometrics PD AUG PY 2005 VL 64 IS 3 BP 351 EP 374 DI 10.1007/s11192-005-0255-6 PG 24 WC Computer Science, Interdisciplinary Applications; Information Science & Library Science SC Computer Science; Information Science & Library Science GA 954MB UT WOS:000231158100006 ER PT J AU Klueh, RL Hashimoto, N Maziasz, PJ AF Klueh, RL Hashimoto, N Maziasz, PJ TI Development of new nano-particle-strengthened martensitic steels SO SCRIPTA MATERIALIA LA English DT Article DE thermomechanical processing; tension test; creep test; analytical electron microscopy; martensitic steel ID COAL POWER-PLANTS; MICROSTRUCTURAL STABILITY; CHROMIUM STEELS; FERRITIC STEEL; BEHAVIOR; ALLOYS AB Nano-sized precipitates were produced in nitrogen-containing commercial martensitic steels by a new thermomechanical treatment (TMT). A steel with the TMT should have a maximum operating temperature > 50 degrees C over the steel given a conventional heat treatment. A > 100 degrees C increase should be possible for a steel developed for the TMT. Published by Elsevier Ltd. on behalf of Acta Materialia Inc. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Klueh, RL (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, POB 2008,MS 6138, Oak Ridge, TN 37831 USA. EM kluehrl@ornl.gov RI HASHIMOTO, Naoyuki/D-6366-2012; OI Maziasz, Philip/0000-0001-8207-334X NR 25 TC 74 Z9 83 U1 3 U2 24 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD AUG PY 2005 VL 53 IS 3 BP 275 EP 280 DI 10.1016/j.scriptamat.2005.04.019 PG 6 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 937XC UT WOS:000229958500002 ER PT J AU Gruber, J George, DC Kuprat, AP Rohrer, GS Rollett, AD AF Gruber, J George, DC Kuprat, AP Rohrer, GS Rollett, AD TI Effect of anisotropic grain boundary properties on grain boundary plane distributions during grain growth SO SCRIPTA MATERIALIA LA English DT Article DE grain growth; grain boundaries; grain boundary energy; grain boundary mobility; anisotropy ID MODELING MICROSTRUCTURE EVOLUTION; 5 MACROSCOPIC PARAMETERS; COMPUTER-SIMULATION; 3 DIMENSIONS; MOBILITY; ENERGY AB The effects of anisotropic grain boundary properties on the evolution of boundary plane distributions were studied using three-dimensional finite element simulations of normal grain growth. The distribution of boundary planes was affected by energy anisotropy whereas no effect was observed for comparatively larger mobility anisotropy. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. C1 Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Carnegie Mellon Univ, Dept Mat Sci & Engn, 5000 Forbes Ave, Pittsburgh, PA 15213 USA. EM jgruber@andrew.cmu.edu RI Rollett, Anthony/A-4096-2012; Rohrer, Gregory/A-9420-2008; OI Rollett, Anthony/0000-0003-4445-2191; Rohrer, Gregory/0000-0002-9671-3034; Kuprat, Andrew/0000-0003-4159-918X NR 16 TC 44 Z9 44 U1 0 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD AUG PY 2005 VL 53 IS 3 BP 351 EP 355 DI 10.1016/j.scriptamat.2005.04.004 PG 5 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 937XC UT WOS:000229958500016 ER PT J AU Ugurlu, O Chumbley, LS Schlagel, DL Lograsso, TA Tsokol, AO AF Ugurlu, O Chumbley, LS Schlagel, DL Lograsso, TA Tsokol, AO TI Identification of thin plates seen in R-5(SixGe1-x)(4) alloys, where R is Gd, Tb, Dy, and Er SO SCRIPTA MATERIALIA LA English DT Article DE scanning electron microscopy (SEM); transmission electron microscopy (TEM); rare earth; microstructure; Gd-5(Si-x,Ge1-x)(4) ID PHASES AB R-5(SixGe1-x)(4) alloys, where R is Tb, Dy, and Er, have been examined. Their microstructures consisted of large grains with thin plates of a second phase. Energy dispersive spectrometry of the plates revealed a rare earth rich composition. It is proposed that the plates are R-5(SixGe1-x)(3) compounds, similar to results seen in Gd-5(SixGe1-x)(4). Published by Elsevier Ltd. on behalf of Acta Materialia Inc. C1 Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Dept Mat Sci & Engn, Ames, IA 50011 USA. RP Ugurlu, O (reprint author), Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. EM ozan@iastate.edu NR 13 TC 11 Z9 11 U1 1 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD AUG PY 2005 VL 53 IS 3 BP 373 EP 377 DI 10.1016/j.scriptamat.2005.03.052 PG 5 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 937XC UT WOS:000229958500020 ER PT J AU Pint, BA Schneibel, JH AF Pint, BA Schneibel, JH TI The effect of carbon and reactive element dopants on oxidation lifetime of FeAl (vol 52, pg 1199, 2005) SO SCRIPTA MATERIALIA LA English DT Correction C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Pint, BA (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA. EM pintba@ornl.gov RI Pint, Bruce/A-8435-2008 OI Pint, Bruce/0000-0002-9165-3335 NR 1 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD AUG PY 2005 VL 53 IS 3 BP 379 EP 379 DI 10.1016/j.scriptamat.2005.04.012 PG 1 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 937XC UT WOS:000229958500021 ER PT J AU Law, M Zhang, XF Yu, R Kuykendall, T Yang, PD AF Law, M Zhang, XF Yu, R Kuykendall, T Yang, PD TI Thermally driven interfacial dynamics of metal/oxide bilayer nanoribbons SO SMALL LA English DT Article DE interfaces; mechanical properties; nanoribbons; template synthesis; wetting ID ELECTRON-MICROSCOPY; BIAXIAL NANOWIRES; METAL-FILMS; GROWTH; SURFACES; COPPER; PALLADIUM; CU; ZNO(0001)-O; NANOBELTS AB Solid-solid interjacial processes greatly affect the performance of electronic and composite materials, but probing the dynamics of buried interfaces is challenging and often involves lengthy or invasive sample preparation. We show that bilayer nanoribbons-made here of tin dioxide and copper- are convenient structures for observing as-made interfaces as they respond to changing temperature in a transmission electron microscope (TEM). At low temperatures (< 200 degrees C), differential thermal expansion causes the bilayers to bend when heated or cooled, with the motion determined by the extent of Cu-SnO2 epitaxy. At higher temperatures, we are able to watch-in real time and with nanometer resolution -a progression of grain growth, interdiffusion, island formation, solid-state chemical reactions, and melting. This novel TEM geometry is readily applicable to other nanoribbon/coating combinations and is well suited to observing interfacial phenomena driven thermally or by the application of mechanical, electrical, or magnetic forces. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Yang, PD (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM p_yang@berkeley.edu RI Yu, Rong/A-3011-2008 OI Yu, Rong/0000-0003-1687-3597 NR 37 TC 22 Z9 22 U1 1 U2 11 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1613-6810 J9 SMALL JI Small PD AUG PY 2005 VL 1 IS 8-9 BP 858 EP 865 DI 10.1002/smll.200500114 PG 8 WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA 951DR UT WOS:000230909800018 PM 17193540 ER PT J AU Kim, KH Moldovan, N Ke, CH Espinosa, HD Xiao, XC Carlisle, JA Auciello, O AF Kim, KH Moldovan, N Ke, CH Espinosa, HD Xiao, XC Carlisle, JA Auciello, O TI Novel ultrananocrystalline diamond probes for high-resolution low-wear nanolithographic techniques SO SMALL LA English DT Article DE AFM; diamond; dip-pen nanolithography; nanocrystalline materials; probe tips ID DIP-PEN NANOLITHOGRAPHY; SPREADING RESISTANCE MICROSCOPY; ATOMIC-FORCE MICROSCOPY; THIN-FILMS; FABRICATION; MEMS; DEPOSITION; TIPS AB A hard, low-wear probe for contact-mode writing techniques, such as dip-pen nanolithography (DPN), was fabricated using ultrananocrystalline diamond (UNCD). Molding within anisotropically etched and oxidized pyramidal pits in silicon was used to obtain diamond tips with radii down to 30 nm through growth of UNCD films followed by selective etching of the silicon template substrate. The probes were monolithically integrated with diamond cantilevers and subsequently integrated into a chip body obtained by metal electroforming. The probes were characterized in terms of their mechanical properties, wear, and atomic force microscopy imaging capabilities. The developed probes performed exceptionally well in DPN molecular writing/imaging mode. Furthermore, the integration of UNCD films with appropriate substrates and the use of directed microfabrication techniques are particularly suitable for fabrication of one- and two-dimensional arrays of probes that can be used for massive parallel fabrication of nanostructures by the DPN method. C1 Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Espinosa, HD (reprint author), Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA. EM espinosa@northwestern.edu RI Espinosa, Horatio/B-6693-2009; Ke, Changhong/C-4064-2008; OI Ke, Changhong/0000-0002-5170-9859 NR 37 TC 52 Z9 52 U1 1 U2 9 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1613-6810 J9 SMALL JI Small PD AUG PY 2005 VL 1 IS 8-9 BP 866 EP 874 DI 10.1002/smll.200500028 PG 9 WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA 951DR UT WOS:000230909800019 PM 17193541 ER PT J AU Zavarin, M Doner, HE AF Zavarin, M Doner, HE TI Effect of P and Se(IV) on calcite precipitation inhibition SO SOIL SCIENCE LA English DT Article DE phosphate; Se(IV); calcite; precipitation ID ION ACTIVITY PRODUCTS; CARBONATE SOLUBILITY; ENHANCED SOLUBILITY; PHOSPHATE SORPTION; CALCAREOUS SOILS; SEA-WATER; KINETICS; GROWTH; SUPERSATURATION; CRYSTALLIZATION AB We studied the role of inorganic P and Se(IV) in calcite precipitation inhibition in a Panoche Creek, California, soil. Calcite precipitation inhibition by inorganic P and Se(IV) was first examined in simple Ca2+- Na+-Cl--HCO3 solutions. In these simple solutions, the presence of small quantities (similar to 0.2 mg L-1) of inorganic phosphate (similar to those typically found in soil solutions) completely inhibited calcite precipitation over the short time period examined. Se(IV) had a similar effect, though its concentration would need to be much higher to exhibit an equivalent degree of precipitation inhibition. A linear relation was found between relative precipitation rate decrease and P [or Se(IV)] concentration in solution when pH and PCO2 were held constant. The inhibition of calcite precipitation by P and Se(IV) was further investigated in more complex real and synthetic soil solutions. Calcite and gypsum saturation states in Panoche Creek, California, soil solutions were examined, and two soil horizons were found to be supersaturated with respect to calcite. Gypsum supersaturation. was not observed. Calcite precipitation inhibition experiments using synthetic supersaturated Panoche Creek soil solutions indicated that soil solutions with > 0.2 mg L-1 inorganic P could completely inhibit calcite precipitation. Se(IV) concentrations in Panoche Creek soil solutions were too low to significantly inhibit calcite precipitation. Calcite precipitation inhibition by Mg, Si, S, Ba, and Sr in synthetic soil solutions was not observed. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Zavarin, M (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave,L-221, Livermore, CA 94551 USA. EM zavarin1@llnl.gov NR 51 TC 1 Z9 1 U1 1 U2 11 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0038-075X J9 SOIL SCI JI Soil Sci. PD AUG PY 2005 VL 170 IS 8 BP 612 EP 623 DI 10.1097/01.ss.0000178204.28299.7c PG 12 WC Soil Science SC Agriculture GA 959ML UT WOS:000231521800004 ER PT J AU Specht, P Ho, JC Xu, X Armitage, R Weber, ER Erni, R Kisielowski, C AF Specht, P Ho, JC Xu, X Armitage, R Weber, ER Erni, R Kisielowski, C TI Band transitions in wurtzite GaN and InN determined by valence electron energy loss spectroscopy SO SOLID STATE COMMUNICATIONS LA English DT Article DE indium-nitride; bandgap; VEELS ID MOLECULAR-BEAM EPITAXY; INDIUM NITRIDE; ABSORPTION; GROWTH; FILMS; EDGE AB Valence electron energy loss spectroscopy (VEELS) was applied to determine band transitions in wurtzite InN, deposited by molecular beam epitaxy on (0001) sapphire substrates or GaN buffer layers. The GaN buffer layer was used as VEELS reference. At room temperature a band transition for wurtzite InN was found at (1.7 +/- 0.2 eV) and for wurtzite GaN at (3.3 +/- 0.2 eV) that are ascribed to the fundamental bandgap. Additional band transitions could be identified at higher and lower energy losses. The latter may be related to transitions involving defect bands. In InN, neither oxygen related crystal phases nor indium metal clusters were observed in the areas of the epilayers investigated by VEELS. Consequently, the obtained results mainly describe the properties of the InN host crystal. (c) 2005 Elsevier Ltd. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Mat Sci & Engn Dept, Berkeley, CA 94720 USA. Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA. LBNL, Natl Ctr Electron Microscopy, Berkeley, CA USA. RP Specht, P (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM specht@socrates.berkeley.edu RI Ho, Johnny/K-5275-2012; Erni, Rolf/P-7435-2014 OI Ho, Johnny/0000-0003-3000-8794; Erni, Rolf/0000-0003-2391-5943 NR 18 TC 35 Z9 35 U1 0 U2 12 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD AUG PY 2005 VL 135 IS 5 BP 340 EP 344 DI 10.1016/j.ssc.2005.04.041 PG 5 WC Physics, Condensed Matter SC Physics GA 948HO UT WOS:000230706900013 ER PT J AU Carter, JC Scaffidi, J Burnett, S Vasser, B Sharma, SK Angel, SM AF Carter, JC Scaffidi, J Burnett, S Vasser, B Sharma, SK Angel, SM TI Stand-off Raman detection using dispersive and tunable filter based systems SO SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY LA English DT Article; Proceedings Paper CT 6th International Conference on Raman Spectroscopy Applied to the Earth and Planetary Sciences CY JUN 06-11, 2004 CL Honolulu, HI SP US Natl Sci Fdn, Univ Hawaii DE stand-off Raman; Raman imaging; AOTF; tunable filters; minerals; Mars ID PLANETARY SURFACES; IN-SITU; SPECTROSCOPY; SPECTROMETRY; MICROSCOPE; POINT; PROBE AB Small, transportable Raman systems are being developed for stand-off Raman measurements at intermediate ranges (e.g. < 20 m) for planetary measurements. Four variations of stand-off Raman systems are described that use a small telescope for light collection that is either fiber-optic or lens-coupled to a detection system. The performance of an acousto-optic tunable filter for wavelength selection and spectral imaging is tested by comparing signal-to-noise ratio and throughput to similar measurements using a conventional spectrograph, and by measuring a variety of organic and inorganic mineral samples at distances up to 15 m. We also determine optimal ICCD gate widths for acquiring remote Raman spectra under high ambient light conditions. (c) 2005 Published by Elsevier B.V. C1 Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA. Univ Hawaii, Hawaii Inst Geophys & Planetol, Honolulu, HI 96822 USA. Lawrence Livermore Natl Lab, Div M, Forens Sci Ctr, Livermore, CA 94550 USA. RP Angel, SM (reprint author), Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA. EM angel@mail.chem.sc.edu OI Angel, Stanley/0000-0002-0328-0568 NR 35 TC 26 Z9 26 U1 2 U2 13 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1386-1425 J9 SPECTROCHIM ACTA A JI Spectroc. Acta Pt. A-Molec. Biomolec. Spectr. PD AUG PY 2005 VL 61 IS 10 BP 2288 EP 2298 DI 10.1016/j.saa.2005.02.028 PG 11 WC Spectroscopy SC Spectroscopy GA 952TE UT WOS:000231027600004 PM 15967708 ER PT J AU Wiens, RC Sharma, SK Thompson, J Misra, A Lucey, PG AF Wiens, RC Sharma, SK Thompson, J Misra, A Lucey, PG TI Joint analyses by laser-induced breakdown spectroscopy (LIBS) and Raman spectroscopy at stand-off distances SO SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY LA English DT Article; Proceedings Paper CT 6th International Conference on Raman Spectroscopy Applied to the Earth and Planetary Sciences CY JUN 06-11, 2004 CL Honolulu, HI SP US Natl Sci Fdn, Univ Hawaii DE Raman spectroscopy; LIBS; spectrographs ID GLASSY STATES; MICRO-RAMAN; SPECTRA; GYPSUM; IDENTIFICATION; CRYSTALLINE; RANGE; SPECTROMETRY; CAPABILITIES; EXPLORATION AB Raman spectroscopy and laser-induced breakdown spectroscopy (LIBS) of solid samples have both been shown to be feasible with sample-to-instrument distances of many meters. The two techniques are very useful together, as the combination of elemental compositions from LIBS and molecular vibrational information from Raman spectroscopy strongly complement each other. Remote LIBS and Raman spectroscopy spectra were taken together on a number of mineral samples including sulfates, carbonates and silicates at a distance of 8.3 in. The complementary nature of these spectra is highlighted and discussed. A factor of similar to 20 difference in intensity was observed between the brightest Raman line of calcite, at optimal laser power, and the brighter Ca I LIBS emission line measured with 55 mJ/pulse laser power. LIBS and Raman spectroscopy have several obstacles to devising a single instrument capable of both techniques. These include the differing spectral ranges and required detection sensitivity. The current state of technology in these areas is discussed. (c) 2005 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87544 USA. Univ Hawaii, Hawaii Inist Geophys & Planetol, Honolulu, HI 96822 USA. RP Wiens, RC (reprint author), Los Alamos Natl Lab, Mail Stop D-466, Los Alamos, NM 87544 USA. EM rwiens@lanl.gov NR 49 TC 64 Z9 67 U1 5 U2 34 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1386-1425 J9 SPECTROCHIM ACTA A JI Spectroc. Acta Pt. A-Molec. Biomolec. Spectr. PD AUG PY 2005 VL 61 IS 10 BP 2324 EP 2334 DI 10.1016/j.saa.2005.02.031 PG 11 WC Spectroscopy SC Spectroscopy GA 952TE UT WOS:000231027600007 PM 16029853 ER PT J AU Ming, LC Sharma, SK Jayaraman, AJ Kobayashi, Y Suzuki, E Endo, S Prakapenka, V Yang, D AF Ming, LC Sharma, SK Jayaraman, AJ Kobayashi, Y Suzuki, E Endo, S Prakapenka, V Yang, D TI X-ray diffraction and Raman studies of the CuGeO3(III)-(IV) transformation under high pressures SO SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY LA English DT Article; Proceedings Paper CT 6th International Conference on Raman Spectroscopy Applied to the Earth and Planetary Sciences CY JUN 06-11, 2004 CL Honolulu, HI SP US Natl Sci Fdn, Univ Hawaii DE phase transformation; synchrotron radiation; X-ray diffraction; Raman spectroscopy; CuGeO3 ID INDUCED PHASE-TRANSITIONS; SYNCHROTRON-RADIATION; CRYSTAL-STRUCTURE; CUGEO3 AB Both X-ray diffraction and Raman spectroscopy measurement were carried out on the same powder sample of CuGeO3(HI) in a diamond anvil cell to high pressures at room temperature. The phase transformation of (III)-(IV) phase was observed at about 7 GPa with both methods and the results were also in accord with previous powder diffraction and Raman measurements, respectively. However, the powder diffraction data were strikingly different from those reported in a recent single-crystal study on the phase (M). It is, therefore, evident that the phase transformations in CuGeO3(III) would be as complicated as those in CuGeO3(l) and that the monoclinic phase obtained from single-crystal phase (III) at approximately 7 GPa [P. Dera, A. Jayaraman, C.T. Prewitt, S.A. Gramsch, Phys. Rev. B 65 (2002) 13415-1-13415- 10] is not the phase (IV) previously observed but rather a new phase (IVa) in CuGeO3. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Hawaii, HIGP, SOEST, Honolulu, HI 96822 USA. Osaka Univ, Res Ctr Mat Extreme Condit, Toyonaka, Osaka 560, Japan. Univ Chicago, CARS, APS, Argonne Natl Lab, Argonne, IL 60439 USA. Argonne Natl Lab, HPCAT, APS, Argonne, IL 60439 USA. RP Ming, LC (reprint author), Univ Hawaii, HIGP, SOEST, 1680 East West Rd,Post 602, Honolulu, HI 96822 USA. EM ming@soest.hawaii.edu RI Ding, Yang/K-1995-2014 OI Ding, Yang/0000-0002-8845-4618 NR 10 TC 7 Z9 7 U1 0 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1386-1425 J9 SPECTROCHIM ACTA A JI Spectroc. Acta Pt. A-Molec. Biomolec. Spectr. PD AUG PY 2005 VL 61 IS 10 BP 2418 EP 2422 DI 10.1016/j.saa.2005.02.024 PG 5 WC Spectroscopy SC Spectroscopy GA 952TE UT WOS:000231027600020 PM 15979395 ER PT J AU Singh, R Martin, M Dahotre, NB AF Singh, R Martin, M Dahotre, NB TI Influence of laser surface modification on corrosion behavior of stainless steel 316L and Ti-6Al-4V in simulated biofluid SO SURFACE ENGINEERING LA English DT Article DE biomaterials; corrosion resistance; dendritic microstructure; electrochemical polarisation; E-pH diagram; laser surface melting; metal ion release; open circuit potential; passive current; pitting corrosion; Ringer's solution; SS316L; surface modification; Ti6Al4V; TiO2 ID METALLIC BIOMATERIALS; TITANIUM-ALLOY; RESISTANCE; MICROSTRUCTURE; IMPLANTATION AB Laser surface engineering has been explored as a possible method for improving the functional surface properties of biomedical materials such as stainless steels and titanium alloys. This study emphasises the influence of laser surface processing, carried out at a range of laser powers from 500 to 1500 W in ambient atmosphere, on the surface microstructure and corrosion behaviour of stainless steel 316L (SS316L) and Ti-6Al-4V, and metal ions released during the corrosion process. A homogeneous surface microstructure includes columnar dendrites and fine grains in the resolidified region of SS316L. A gradual increase in grain size from the processed surface towards the substrate was revealed, The laser processing of Ti-6Al-4V produced a surface full of dendrites followed by acicular martensite in the interface region. The corrosion studies in Ringer's physiological solution showed an increase in the open circuit potential (OCP) as a result of laser surface treatment of both SS316L and Ti-6Al-4V (more noble than untreated). After laser processing, the corrosion properties of SS316L were seen to deteriorate, and those of Ti-6Al-4V to improve, as compared to their respective untreated counterparts. The variation of laser power influenced the corrosion resistance of SS316L, while that of Ti-6Al-4V did not vary significantly. Laser surface treatments at higher powers (> 1000 W) reduced the leaching of specific metallic ions from SS316L and Ti-6Al-4V during corrosion in Ringer's physiological solution. C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. Natl Met Lab, Jamshedpur 831007, Bihar, India. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Mat Proc Grp, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Dahotre, NB (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. EM ndahotre@utk.edu RI Martin, Madhavi/A-5268-2011; Sahu, Anjani/E-7590-2015 NR 34 TC 15 Z9 15 U1 2 U2 14 PU MANEY PUBLISHING PI LEEDS PA HUDSON RD, LEEDS LS9 7DL, ENGLAND SN 0267-0844 J9 SURF ENG JI Surf. Eng. PD AUG PY 2005 VL 21 IS 4 BP 297 EP 306 DI 10.1179/174329405X55320 PG 10 WC Materials Science, Coatings & Films SC Materials Science GA 968CG UT WOS:000232138900005 ER PT J AU Barbarich-Marsteller, NC Marsteller, DA Alexoff, DL Fowler, JS Dewey, SL AF Barbarich-Marsteller, NC Marsteller, DA Alexoff, DL Fowler, JS Dewey, SL TI MicroPET imaging in an animal model of anorexia nervosa SO SYNAPSE LA English DT Article DE neuroimaging; (18)FDG uptake; eating disorders; rodents; food restriction ID 5-HT2A RECEPTOR-BINDING; TERM WEIGHT RESTORATION; RAT-BRAIN; SEROTONIN ACTIVITY; RESTRICTING-TYPE; FEMALE RATS; RECOVERY; OLANZAPINE; HYPOMETABOLISM; FLUOXETINE AB Anorexia nervosa is a life-threatening psychiatric disorder characterized by severe weight loss and high rates of comorbidity and mortality. The current study assessed the feasibility of using microPET imaging to study the effects of chronic food restriction in an animal model of anorexia nervosa. To establish preliminary support for this model, we hypothesized that chronic food restriction would decrease relative 2-deoxy-2-[F-18]fluoro-D-glucose ((18)FDG) uptake in the rat, in effect modeling cerebral glucose hypometabolism reported in the clinical population of anorexia nervosa. Nine adolescent Wistar female rats received a baseline (18)FDG scan. The control group received free access to food for a period of 25 days. The food restricted (FR) group received 40% of their baseline daily food intake until a 30% weight loss occurred; body weight was then maintained at 70% of baseline by adjusting daily food intake. The FR group also had free access to a running wheel for a mean period of 10.8 +/- 6.1 days. Both groups received a follow-up (18)FDG scan. Relative (18)FDG uptake was significantly increased in the cerebellum and significantly decreased in the hippocampus and striatum in the FR group compared to controls. Moreover, there was a trend towards a decrease in relative (18)FDG uptake in the thalamus in the FR compared to control group. This is the first study to establish support for the use of microPET imaging in an animal model of anorexia nervosa as a means for studying the neurobiological changes that occur due to chronic food restriction. (c) 2005 Wiley-Liss, Inc. C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. SUNY Stony Brook, Grad Program Neurosci, Dept Neurobiol & Behav, Stony Brook, NY 11794 USA. SUNY Stony Brook, Grad Program Mol & Cellular Pharmacol, Stony Brook, NY 11794 USA. NYU, Sch Med, Dept Psychiat, New York, NY 10016 USA. RP Barbarich-Marsteller, NC (reprint author), Brookhaven Natl Lab, Dept Chem, Bldg 555, Upton, NY 11973 USA. EM nbarbarich@yahoo.com FU NIDA NIH HHS [DA15082, DA015041] NR 32 TC 12 Z9 13 U1 1 U2 1 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0887-4476 J9 SYNAPSE JI Synapse PD AUG PY 2005 VL 57 IS 2 BP 85 EP 90 DI 10.1002/syn.20160 PG 6 WC Neurosciences SC Neurosciences & Neurology GA 938JW UT WOS:000229996900003 PM 15906391 ER PT J AU Burr, TL Fry, HA AF Burr, TL Fry, HA TI Biased regression: The case for cautious application SO TECHNOMETRICS LA English DT Article DE cross-validation; minmax; partial least squares; principal components; ridge regression ID PARTIAL LEAST-SQUARES; PRINCIPAL COMPONENT REGRESSION; RIDGE-REGRESSION; LINEAR-REGRESSION; CROSS-VALIDATION; ESTIMATORS; CALIBRATION; SHRINKAGE; SELECTION; EXPLICIT AB Biased regression (BR) methods have received only lukewarm approval, largely because of the practical difficulty in using data-driven methods to find a biased estimator that is better than ordinary least squares (OLS). Nevertheless, we believe there are situations where BR methods are worthy contenders. For example, we focus on multivariate calibration using chemical spectra where the goal is to predict all component concentrations. We illustrate a cautious application of several BR methods on both real and simulated data in which we keep the OLS solution unless there is strong evidence that the BR solution is better. C1 Los Alamos Natl Lab, Stat Sci Grp, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Chem React Kinet & Dynam Grp, Los Alamos, NM 87545 USA. RP Burr, TL (reprint author), Los Alamos Natl Lab, Stat Sci Grp, POB 1663, Los Alamos, NM 87545 USA. EM tburr@lanl.gov NR 48 TC 3 Z9 3 U1 1 U2 7 PU AMER STATISTICAL ASSOC PI ALEXANDRIA PA 1429 DUKE ST, ALEXANDRIA, VA 22314 USA SN 0040-1706 J9 TECHNOMETRICS JI Technometrics PD AUG PY 2005 VL 47 IS 3 BP 284 EP 296 DI 10.1198/004017005000000012 PG 13 WC Statistics & Probability SC Mathematics GA 949RS UT WOS:000230806400005 ER PT J AU Kamasa, P Myslinski, P Pyda, M AF Kamasa, P Myslinski, P Pyda, M TI Thermal expansivity of polystyrene determined by multi-frequency dilatometry SO THERMOCHIMICA ACTA LA English DT Article DE thermal expansibility; polystyrene; multi-frequency dilatometry ID TEMPERATURE THERMOMECHANICAL ANALYSIS; HEAT-CAPACITY; DSC AB Thermal expansibility and heat capacity of solids in general are linked by the first Gruneisen parameter. While the thermal expansion results from molecular motion in an anharminic potential, contribution to the heat capacity results from all kinds of motion. Similar to the temperature modulated DSC, thermal expansion can be measured by modulated temperature dilatometry (MT-DIL). One component corresponding to the reversing dilatation contributes to both the total and the modulated dimension change, while the non-reversing gives a characteristic easily distinguishable spike. In the present work a multi-frequency temperature modulated program was applied in push-rod dilatometer to measure a coefficient of thermal expansion (CTE) of polystyrene in the temperature range up to glass transition. At the temperature just below glass transition, the frequency dependence of CTE is observed, similar to the heat capacity behavior by MT-DSC. (c) 2004 Published by Elsevier B.V. C1 Hungarian Acad Sci, Res Inst Solid State Phys & Opt, Dept Met Res, H-1525 Budapest, Hungary. Tech Univ Koszalin, PL-75620 Koszalin, Poland. Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Chem & Analyt Sci Div, Oak Ridge, TN 37831 USA. RP Kamasa, P (reprint author), Hungarian Acad Sci, Res Inst Solid State Phys & Opt, Dept Met Res, POB 49, H-1525 Budapest, Hungary. EM kamasa@szfki.hu NR 13 TC 5 Z9 5 U1 0 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0040-6031 J9 THERMOCHIM ACTA JI Thermochim. Acta PD AUG 1 PY 2005 VL 433 IS 1-2 BP 93 EP 97 DI 10.1016/j.tca.2004.11.014 PG 5 WC Thermodynamics; Chemistry, Analytical; Chemistry, Physical SC Thermodynamics; Chemistry GA 946OB UT WOS:000230580600013 ER PT J AU Gao, W Klie, R Altman, EI AF Gao, W Klie, R Altman, EI TI Growth of anatase films on vicinal and flat LaAlO3 (110) substrates by oxygen plasma assisted molecular beam epitaxy SO THIN SOLID FILMS LA English DT Article DE molecular beam epitaxial; titanium oxide; electron diffraction; scanning tunneling microscopy; transmission electon microscopy ID ELECTRON-ENERGY-LOSS; TITANIUM-DIOXIDE; TIO2 FILMS; ROOM-TEMPERATURE; THIN-FILMS; SURFACE; PHOTOCATALYSIS; FERROMAGNETISM; TIO2(001); RUTILE AB The heteroepitaxial growth and surface structures of TiO2 films on vicinal and flat LaAlO3 (110) were characterized. The films were grown by oxygen plasma assisted molecular beam epitaxy at low growth rates and temperatures between 825 and 875 K. Bulk characterization by low energy electron loss spectroscopy indicated that only the anatase structure formed. Both X-ray diffraction and scanning transmission electron microscopy indicated that the films grew with anatase (102) planes parallel to the interface. The surfaces of the films were characterized by reflection high energy electron diffraction (RHEED) during growth, and photoelectron spectroscopy, low energy electron diffraction (LEED), and scanning tunneling microscopy (STM) following growth. The photoelectron spectra were consistent with the growth of stoichiometric TiO2. Both RHEED and LEED, however, showed patterns expected of anatase (10 1) surfaces, not anatase (102). Further, STM images revealed the oblique unit cell expected of anatase (101) along with many parallel steps. The (101) surface is the lowest energy anatase surface and it is suggested that the film surface facets towards (101) to reduce the surface energy. Anatase (101) is also a much better geometric match to LaAlO3 (110) than anatase (102); however, unlike the [102] orientation, the [101] orientation places Ti cations directly above substrate cations increasing the interfacial energy. Thus the film structure and surface morphology is determined by the interplay between geometric and electronic matching at the interface and the energy of the free surface. (c) 2005 Published by Elsevier B.V. C1 Yale Univ, Dept Chem Engn, New Haven, CT 06520 USA. Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA. RP Altman, EI (reprint author), Yale Univ, Dept Chem Engn, New Haven, CT 06520 USA. EM eric.altman@yale.edu NR 34 TC 18 Z9 18 U1 2 U2 25 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0040-6090 J9 THIN SOLID FILMS JI Thin Solid Films PD AUG 1 PY 2005 VL 485 IS 1-2 BP 115 EP 125 DI 10.1016/j.tsf.2005.03.041 PG 11 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA 946XX UT WOS:000230607700018 ER PT J AU Salmeron, M AF Salmeron, M TI The nature of the catalytic sites for H-2 dissociation SO TOPICS IN CATALYSIS LA English DT Article ID SCANNING TUNNELING MICROSCOPE; REFLECTION-ABSORPTION SPECTROSCOPY; RAY PHOTOELECTRON-SPECTROSCOPY; SUM-FREQUENCY GENERATION; IN-SITU; CO ADSORPTION; SINGLE ATOMS; GAS-PHASE; PRESSURE; DYNAMICS AB Scanning Tunneling Microscopy (STM) can reveal the nature of active sites on the surface of heterogeneous catalysts. This is shown for the case of the dissociation of molecular hydrogen on Pd(111), which has been studied recently both experimentally and theoretically. STM can image in real time to generate movies of adsorbed atoms diffusing on the catalyst surface and forming aggregates. Of particular interest is the behavior near saturation coverage, a situation that is common when catalysts operate under the gas pressures typical of many industrial reactions. Under these conditions, active catalyst sites are formed as a result of density fluctuations that free atoms at the catalyst surface of adsorbates, so that they become available for new reactions. Little is known about the structure of the sites generated in this process. While the end state of a dissociative adsorption of a diatomic molecule requires at least two empty sites to accommodate the reaction products, the initial state where the molecule adsorbs and dissociates, might be more complicated and its nature is unknown. The review shows how STM can provide an improved understanding of the nature of these initial sites. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Salmeron, M (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. NR 42 TC 8 Z9 8 U1 2 U2 12 PU SPRINGER/PLENUM PUBLISHERS PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1022-5528 J9 TOP CATAL JI Top. Catal. PD AUG PY 2005 VL 36 IS 1-4 BP 55 EP 63 DI 10.1007/s11244-005-7862-6 PG 9 WC Chemistry, Applied; Chemistry, Physical SC Chemistry GA 984BB UT WOS:000233276400007 ER PT J AU Min, BK Alemozafar, AR Biener, MM Biener, J Friend, CM AF Min, BK Alemozafar, AR Biener, MM Biener, J Friend, CM TI Reaction of Au(111) with sulfur and oxygen: Scanning tunneling microscopic study SO TOPICS IN CATALYSIS LA English DT Article DE scanning tunneling microscopy; STM; gold; Au(111); sulfur; oxygen; reconstruction; restructuring ID INDUCED SURFACE STRESS; CATALYTIC-ACTIVITY; CO OXIDATION; GOLD; ADSORPTION; RECONSTRUCTION; NANOCLUSTERS; CLUSTERS; METHANOL; DEFECTS AB The reaction of sulfur and oxygen with the gold surface is important in many technological applications, including heterogeneous catalysis, corrosion, and chemical sensors. We have studied reactions on Au(111) using scanning tunneling microscopy (STM) in order to better understand the surface structure and the origin of gold's catalytic activity. We find that the Au(111) surface dynamically restructures during deposition of sulfur and oxygen and that these changes in structure promote the reactivity of Au with respect to SO2 and O-2 dissociation. Specifically, the Au(111) herringbone reconstruction lifts when either S or O is deposited on the surface. We attribute this structural change to the reduction of tensile surface stress via charge redistribution by these electronegative adsorbates. This lifting of the reconstruction was accompanied by the release of gold atoms from the herringbone structure. At high coverage, clusters of gold sulfides or gold oxides form by abstraction of gold atoms from regular terrace sites of the surface. Concomitant with the restructuring is the release of gold atoms from the herringbone structure to produce a higher density of low-coordinated Au sites by forming serrated step edges or small gold islands. These undercoordinated Au atoms may play an essential role in the enhancement of catalytic activity of gold in reactions such as oxygen dissociation or SO2 decomposition. Our results further elucidate the interaction between sulfur and oxygen and the Au(111) surface and indicate that the reactivity of Au nanoclusters on reducible metal oxides is probably related to the facile release of Au from the edges of these small islands. Our results provide insight into the sintering mechanism which leads to deactivation of Au nanoclusters and into the fundamental limitation in the edge definition in soft lithography using thiol-based self-assembled monolayers (SAMs) on Au. Furthermore, the enhanced reactivity of Au after release of undercoordinated atoms from the surface indicate a relatively insignificant role of an oxide support for high reactivity. C1 Harvard Univ, Dept Chem & Biol Chem, Cambridge, MA 02138 USA. Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA. Lawrence Livermore Natl Lab, Nanoscale Synth & Characterizat Lab, Livermore, CA 94550 USA. RP Friend, CM (reprint author), Harvard Univ, Dept Chem & Biol Chem, 12 Oxford St, Cambridge, MA 02138 USA. EM cfriend@deas.harvard.edu NR 50 TC 80 Z9 80 U1 6 U2 82 PU SPRINGER/PLENUM PUBLISHERS PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1022-5528 J9 TOP CATAL JI Top. Catal. PD AUG PY 2005 VL 36 IS 1-4 BP 77 EP 90 DI 10.1007/s11244-005-7864-4 PG 14 WC Chemistry, Applied; Chemistry, Physical SC Chemistry GA 984BB UT WOS:000233276400009 ER PT J AU Sordelet, D Yang, XY AF Sordelet, D Yang, XY TI Linkage between oxygen content and metastable phase formation in melt spun Zr80Pt20 alloys SO TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS LA English DT Article; Proceedings Paper CT 2nd International Conference on Solidification Science and Processing CY NOV 17-20, 2004 CL Bangalore, INDIA SP Indian Inst Technol Kharagpur ID METALLIC GLASSES; CRYSTALLIZATION AB This report continues previous studies that show melt spun Zr80Pt20 ribbons having oxygen contents ranging from < 200 to approximately 5000 mass ppm form various metastable phases during quenching, In the presence of sufficient oxygen, a big cube Zr6Pt30 phase forms, but this structure is destabilized towards an icosahedral quasicrystalline structure at lower oxygen levels. Further reduction of oxygen promotes increasingly stable Zr-Pt bonds, and a metastable beta-Zr(Pt) structure is formed. C1 Iowa State Univ, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA. RP Sordelet, D (reprint author), Iowa State Univ, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA. EM sordeled@ameslab.gov NR 20 TC 0 Z9 0 U1 0 U2 1 PU INDIAN INST METALS PI CALCUTTA PA METAL HOUSE, PLOT 13/4, BLOCK AQ, SECTOR V, SALT LAKE, CALCUTTA 700 091, INDIA SN 0019-493X J9 T INDIAN I METALS JI Trans. Indian Inst. Met. PD AUG PY 2005 VL 58 IS 4 BP 749 EP 760 PG 12 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA 970TO UT WOS:000232332700035 ER PT J AU Breidenbach, MA Brunger, AT AF Breidenbach, MA Brunger, AT TI New insights into clostridial neurotoxin-SNARE interactions SO TRENDS IN MOLECULAR MEDICINE LA English DT Review ID A BOTULINUM NEUROTOXIN; TOXIN TYPE-A; BLOCK NEUROTRANSMITTER RELEASE; MEDIATED MEMBRANE-FUSION; TETANUS TOXIN; CRYSTAL-STRUCTURE; LIGHT-CHAIN; STRUCTURAL-ANALYSIS; SYNAPTIC VESICLES; ANGSTROM RESOLUTION AB Botulinum neurotoxin serotype A (BoNT/A) has achieved a dichotomous status in modern medicine; it is both a versatile treatment for several neurological disorders and a lethal poison responsible for causing the neuroparalytic syndrome botulism. The extent of paralysis largely depends on the dosage of toxin received. The toxins block neurotransmitter release by delivering their Zn2+-dependent protease components to the presynaptic side of chemical synapses. These highly specialized enzymes exclusively hydrolyze peptide bonds within SNARE (soluble N-ethylmaleiamidesensitive factor attachment protein receptor) proteins. Recently, the structural basis for the highly specific interaction between BoNT/A and its target SNARE, SNAP-25 (synaptosomal-associated protein of 25 kDa), was elucidated. Now details regarding the nature of the toxin-SNARE interactions could be exploited for novel inhibitor design. C1 Stanford Univ, Howard Hughes Med Inst, Stanford, CA 94305 USA. Stanford Univ, Dept Cellular & Mol Physiol, Stanford, CA 94305 USA. Stanford Univ, Dept Neurol & Neurol Sci, Stanford, CA 94305 USA. Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA. RP Brunger, AT (reprint author), Stanford Univ, Howard Hughes Med Inst, Stanford, CA 94305 USA. EM brunger@stanford.edu OI Brunger, Axel/0000-0001-5121-2036 FU NIMH NIH HHS [1R01 MH 063105-01] NR 70 TC 44 Z9 46 U1 2 U2 11 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 1471-4914 J9 TRENDS MOL MED JI Trends Mol. Med PD AUG PY 2005 VL 11 IS 8 BP 377 EP 381 DI 10.1016/j.molmed.2005.06.012 PG 5 WC Biochemistry & Molecular Biology; Cell Biology; Medicine, Research & Experimental SC Biochemistry & Molecular Biology; Cell Biology; Research & Experimental Medicine GA 959MH UT WOS:000231521400008 PM 16006188 ER PT J AU Hastings, BK Breshears, DD Smith, FM AF Hastings, BK Breshears, DD Smith, FM TI Spatial variability in rainfall erosivity versus rainfall depth: Implications for sediment yield SO VADOSE ZONE JOURNAL LA English DT Article ID PINYON-JUNIPER WOODLAND; CLIMATE VARIATION; NEW-MEXICO; RUNOFF; EROSION; SCALE; DISTURBANCE; VEGETATION; ARIZONA AB Rainfall depth within small semiarid watersheds can have high spatial variability, but spatial variability in rainfall erosivity, a more direct determinant of sediment yield, has not been quantified. Using 12 tipping-bucket rain gauges within a 40-ha pinon [Pinus edulis Engelm)-juniper (Juniperus monosperma (Engelm.) Sarg.] woodland New Mexico, we measured rainfall erosivity (EI30) and associated and erosion metrics for 14 convective thunderstorms. Spatial variability in EI30 had a median CV across storms of 22% (range: 9-73%), exceeded the median CV for rainfall depth (15%, range: 5-26%), and varied by up to a factor of five (5-25 N h(-1)) within 300 m. EI30 was better correlated with sediment yield measured in <0.1-ha microwatersheds (r(2) = 0.67; p < 0.001) than rainfall depth (r(2) = 0.43; p < 0.001). Our results highlight the potential importance for erosion related assessments of spatial variability in erosivity, which can be as great or greater than spatial variability in rainfall depth. The spatial variability in rainfall erosivity that we document here is to erosion and contaminant transport issues near Los Alamos National Laboratory and may be applicable to other extensive semiarid areas. C1 Balance Hydrol Inc, Berkeley, CA 94710 USA. Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. Colorado State Univ, Dept Earth Resources, Ft Collins, CO 80523 USA. RP Hastings, BK (reprint author), Balance Hydrol Inc, 841 Folger Ave, Berkeley, CA 94710 USA. EM bhastings@balancehydro.com RI Breshears, David/B-9318-2009 OI Breshears, David/0000-0001-6601-0058 NR 34 TC 8 Z9 8 U1 0 U2 5 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 500 EP 504 DI 10.2136/vzj2004.0036 PG 5 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400001 ER PT J AU Springer, EP AF Springer, EP TI Statistical exploration of matrix hydrologic properties for the Bandelier Tuff, Los Alamos, New Mexico SO VADOSE ZONE JOURNAL LA English DT Article ID UNSATURATED SOILS; FLOW AB The Bandelier Tuff forms the top of the thick vadose zone at Los Alamos National Laboratory (LANL). Subsurface pathway performance or risk assessments at Los Alamos require characterizing the hydrologic properties of the Bandelier Tuff. The objective of this study was to analyze available unsaturated zone matrix hydrologic properties data for the Bandelier Tuff from the Los Alamos for the purpose of developing estimates of properties and parameters for modeling vadose zone flow and transport. The hydrologic properties bulk density, saturated hydraulic conductivity, and the van Genuchten equation parameters, residual and saturated water contents , alpha, and n, were measured or estimated from measured data. A nonparametric statistical approach was used because of the small sample size leading to nonnormal distribution of the samples. The following differences were investigated: (i) between boreholes for a given unit within a site and (ii) between sites for a given unit. Results for borehole analyses within a location found that properties were different at one location and could be combined at another. The testing between locations found that samples could be readily combined. Linear correlation analyses of the one geologic unit that was the most consistent across the Los Alamos site found that there was essentially no relationship between matrix hydrologic properties or parameters to allow surrogate properties to be used for prediction. This preliminary analysis indicated that investigations at LANL will require more detailed sampling on a site-specific basis because properties cannot be transferred or estimated with any confidence. C1 Los Alamos Natl Lab, Atmospher Climate & Environm Dynam Grp, Los Alamos, NM 87545 USA. RP Springer, EP (reprint author), Los Alamos Natl Lab, Atmospher Climate & Environm Dynam Grp, Mail Stop J 495, Los Alamos, NM 87545 USA. EM everetts@lanl.gov RI Springer, Everett/B-6376-2012 OI Springer, Everett/0000-0002-9816-8148 NR 17 TC 9 Z9 9 U1 1 U2 3 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 505 EP 521 DI 10.2136/vzj2004.0067 PG 17 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400002 ER PT J AU Broxton, DE Vaniman, DT AF Broxton, DE Vaniman, DT TI Geologic framework of a groundwater system on the margin of a rift basin, Pajarito Plateau, north-central New Mexico SO VADOSE ZONE JOURNAL LA English DT Review ID RIO-GRANDE RIFT; JEMEZ VOLCANIC FIELD; CERRO TOLEDO RHYOLITE; VALLES-CALDERA; ESPANOLA BASIN; AR-40/AR-39 GEOCHRONOLOGY; MOUNTAINS; EVOLUTION; ERUPTIONS; ZONE AB The Pajarito Plateau is an important source of abundant potable groundwater for Los Alamos National Laboratory (LANL) and the communities of Los Alamos and White Rock. Geologic investigations were undertaken as part of a plateau-wide hydrogeological investigation to develop conceptual models of the groundwater system as a for numerical simulations of groundwater flow. The Pajarito Plateau is located in the western part of the Espanola basin where rocks of the Jemez and Cerros del Rio volcanic fields overlie and interfinger with Neogene basin-fill sedimentary rocks. The vadose zone is about 200 m (600 ft) thick beneath mesas on the east side of the plateau and more than 375 m (1245 ft) thick on the west side. Groundwater occurs as shallow groundwater in canyon-floor alluvium, moderately deep groundwater perched in bedrock units of the vadose zone, and groundwater associated with the regional saturated zone. The most productive rocks of the regional aquifer occur in a westward-thickening wedge of coarse-grained, Miocene and Pliocene volcaniclastic rocks derived from the Jemez volcanic field. Eastern aquifer rocks consist of fine-grained, somewhat less productive Miocene sedimentary deposits derived from highland sources to the east and north. Intermediate and mafic lavas interbedded with the Miocene and Pliocene sedimentary deposits are components of the regional aquifer locally. The hydrogeology of the Pajarito Plateau is probably typical of groundwater systems along the margins of the Rio Grande rift where arid to semiarid, sediment-filled basins receive most of their from adjacent mountainous areas. C1 Los Alamos Natl Lab, Hydrol Geochem & Geol Grp, Los Alamos, NM 87544 USA. RP Broxton, DE (reprint author), Los Alamos Natl Lab, Hydrol Geochem & Geol Grp, POB 1663, Los Alamos, NM 87544 USA. EM broxton@lanl.gov NR 107 TC 27 Z9 27 U1 0 U2 7 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 522 EP 550 DI 10.2136/vzj2004.0073 PG 29 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400003 ER PT J AU Newman, BD Robinson, BA AF Newman, BD Robinson, BA TI The hydrogeology of Los Alamos National Laboratory: Site history and overview of vadose zone and groundwater issues SO VADOSE ZONE JOURNAL LA English DT Article AB This summary paper describes the hydrogeologic setting and site history for the Los Alamos National Laboratory (LANL), and as such, serves as an introduction to this special section in Vadose Zone Journal on the LANL site. Since 1943, LANL has operated on the Pajarito Plateau of north-central New Mexico, performing national security research and development, particularly involving nuclear weapons design and engineering. There is an ongoing environmental characterization and remediation program as a result of the legacy of these operations. The flow and transport processes in the thick vadose zone in this semiarid region have been examined extensively at this site, and significant scientific findings have advanced our understanding and predictive abilities. This special section highlights the noteworthy field and modeling investigations conducted at LANL. The authors believe that these articles will be of benefit to the community of hydrologists working on vadose zone flow and transport by providing complex observational data sets and accompanying modeling studies to the field data. C1 Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. RP Newman, BD (reprint author), Los Alamos Natl Lab, Div Earth & Environm Sci, POB 1663,MS J495, Los Alamos, NM 87545 USA. EM bnewman@lanl.gov RI Robinson, Bruce/F-6031-2010 NR 24 TC 7 Z9 7 U1 0 U2 1 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 614 EP 619 DI 10.2136/vzj2005.0072 PG 6 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400009 ER PT J AU Birdsell, KH Newman, BD Broxton, DE Robinson, BA AF Birdsell, KH Newman, BD Broxton, DE Robinson, BA TI Conceptual models of vadose zone flow and transport beneath the Pajarito Plateau, Los Alamos, New Mexico SO VADOSE ZONE JOURNAL LA English DT Article ID GROUNDWATER RECHARGE; CONSTRAINTS; WATER; TUFF AB The Pajarito Plateau in northern New Mexico, on which the Los Alamos National Laboratory is situated, is characterized by a thick vadose zone overlying the regional aquifer of the western Espanola Basin. In this study, conceptual models of vadose zone flow and transport processes are presented and then supported through the interpretation of field data, including synthesis with numerical models. The conceptual models differentiate the rate of percolation by their location and surface hydrologic setting, including wet and dry canyons, wet, dry, and disturbed mesas. Net infiltration beneath wet canyons is the highest, with rates on the order of a meter per year (100-1000 mm yr(-1)). Transport to the regional aquifer beneath the wettest canyons is likely on the order of several years to several decades, depending on the thicknesses of the various hydrostratigraphic layers. Perched water is sometimes found beneath wetter canyons and is associated with near-surface alluvial systems and at depths along low-permeability interfaces such as buried soils or unfractured regions of basalt flows. Percolation through the volcanic tuffs is generally considered to be via matrix-dominated flow, whereas fracture flow may play a key role in contaminant transport through densely welded tuffs or basalt units beneath wet canyons. Infiltration beneath dry canyons and dry mesas is much slower (10 mm yr(-1) or less), yielding transport times to the aquifer of hundreds to several thousands of years. However, long-term surface disturbances at mesa-top locations may alter infiltration rates such that at a local scale, the infiltration rates temporarily approach those of wetter canyons. C1 Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. RP Birdsell, KH (reprint author), Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. EM khb@lanl.gov RI Robinson, Bruce/F-6031-2010 NR 73 TC 18 Z9 19 U1 0 U2 11 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 620 EP 636 DI 10.2136/vzj2004.0172 PG 17 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400010 ER PT J AU Robinson, BA Broxton, DE Vaniman, DT AF Robinson, BA Broxton, DE Vaniman, DT TI Observations and modeling of deep perched water beneath the Pajarito Plateau SO VADOSE ZONE JOURNAL LA English DT Article ID RECHARGE RATE ESTIMATION; HYDROLOGIC CONSTRAINTS; ARID ENVIRONMENTS; YUCCA MOUNTAIN; BODIES AB Geologic characterization of the Pajarito Plateau, in support of environmental investigations of potential groundwater contamination at Los Alamos National Laboratory, has provided the opportunity to examine the nature and extent of deep perched groundwater in this semiarid setting. Deep perched groundwater occurs at widely dispersed locations across the Pajarito Plateau. A total of 33 perched-zone occurrences were identified in 29 wells. The saturated thickness of perched zones is highly variable, ranging from about 1 to > 122 m (>400 ft). Observations are consistent with a conceptual model of low-permeability horizons on which infiltrating water sits. Deep perched ground-water is most often found beneath wet canyons, suggesting that in addition to perching horizons, locally high percolation rates are required to yield saturated conditions. Two conceptual models of perching systems are considered, one relatively stagnant and one more dynamic. To simulate deep perched groundwater in vadose zone flow a new method is developed that considers the interfaces between hydrogeologic units to be the horizons where the saturated permeability is lower than either of the units above or below the interface. A constant multiplier called the permeability reduction factor is applied at the interface between two hydrostratigraphic units to simulate the perching horizon. We demonstrate the method with two-dimensional numerical simulations performed for Los Alamos Canyon, replicating perched saturation as observed and showing how contaminant dispersal may be enhanced in certain perched systems compared with dispersion in the underlying zone of regional saturation. C1 Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. RP Robinson, BA (reprint author), Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. EM robinson@lanl.gov RI Robinson, Bruce/F-6031-2010 NR 28 TC 9 Z9 9 U1 0 U2 4 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 637 EP 652 DI 10.2136/vzj2004.0168 PG 16 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400011 ER PT J AU Keating, EH Robinson, BA Vesselinov, VV AF Keating, EH Robinson, BA Vesselinov, VV TI Development and application of numerical models to estimate fluxes through the regional aquifer beneath the Pajarito Plateau SO VADOSE ZONE JOURNAL LA English DT Article ID GROUNDWATER-FLOW; NEW-MEXICO; BASIN AB Before recent drilling and characterization efforts in the vicinity of Los Alamos National Laboratory (LANL), conceptual models had been developed for recharge and discharge in the regional aquifer on the basis of sparse data. By integrating site-wide data into a numerical model of the aquifer beneath the plateau we provide new insight into large-scale aquifer properties and fluxes. This model is useful for hydrologic mechanisms, assessing the magnitudes of terms in the overall water budget, and, through sampling, for interpreting contaminant migration velocities in the overlying vadose zone. Modeling results suggest that the majority of water produced in well fields on the plateau, extracted at rates approaching 70% of total annual recharge, is derived from storage. This result is insensitive to assumptions about the percentage of total recharge that occurs in the near vicinity of water supply wells, because of strong anisotropy the aquifer that prevents fast transport of local recharge to deeper from which production occurs. Robust estimates of fluxes in the shallow portion of the aquifer immediately down gradient of LANL are important for contaminant transport simulations. Our model calculations show that these fluxes have decreased in the past 50 years by approximately 10% because of production in water supply wells. To explore the role of parameter uncertainty in flux prediction, a predictive analysis method was applied. Results showed that predicted flux through older basalts in the aquifer can vary by a factor of three because of uncertainty in aquifer properties and total recharge. We explored the impact of model parameter uncertainty on these results; however, the true uncertainty of our predictions, including the impact of possible conceptual model errors, is likely to be larger and is difficult to quantify. C1 Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87544 USA. RP Keating, EH (reprint author), Los Alamos Natl Lab, Div Earth & Environm Sci, T003, Los Alamos, NM 87544 USA. EM ekeating@lanl.gov RI Robinson, Bruce/F-6031-2010; Vesselinov, Velimir/P-4724-2016 OI Vesselinov, Velimir/0000-0002-6222-0530 NR 55 TC 12 Z9 12 U1 1 U2 3 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 653 EP 671 DI 10.2136/vzj2004.0101 PG 19 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400012 ER PT J AU Kwicklis, E Witkowski, M Birdsell, K Newman, B Walther, D AF Kwicklis, E Witkowski, M Birdsell, K Newman, B Walther, D TI Development of an infiltration map for the Los Alamos area, New Mexico SO VADOSE ZONE JOURNAL LA English DT Article ID ARID SYSTEM HYDRODYNAMICS; DESERT AB Using new and previously published estimates of point infiltration in upland areas and estimates of stream-flow losses and gains along canyon bottoms, we created a map of net infiltration for the Los Alamos area, New Mexico for the pre-Cerro Grande fire period. The point infiltration estimates are based on a combination of techniques that include the use of the Richards equation, the chloride mass-method, and numerical modeling. The infiltration rates estimated with these techniques were extrapolated to uncharacterized parts of the study area using maps of environmental variables that are correlated with infiltration (such as topography, vegetation cover, and surficial geology and structure) and spatial algorithms implemented with GIS software that use the mapped variables. The map indicates that infiltration rates on mesas of the Pajarito Plateau are generally <2 mm yr(-1), except near faults, where infiltration rates may be several tens to hundreds of millimeters per year. Infiltration rates at higher elevations in the Sierra de los Valles are typically >25 mm yr(-1) in mixed conifer areas and >200 mm yr(-1) in areas vegetated by An irregular transition zone with infiltration rates between 2 to <5 mm yr(-1) exists near the western edge of the Pajarito Plateau adjacent to the Sierra de los Valles. This transition zone extends to lower elevations on the north-facing slopes of deeply incised canyons. Canyon-bottom infiltration rates are highly variable, ranging from several hundred millimeters per year in canyons with large watersheds that have their headwaters in the Sierra de los Valles or in canyons that receive effluent from Laboratory operations, to several millimeters per year in canyons that have their headwaters on the Pajarito Plateau but do not receive Laboratory effluent. The total net infiltration of approximately 10.6 x 10(6) m(3) yr(-1) (8600 acre-ft yr(-1)) is consistent estimates of the steady-state groundwater discharge to perennial streams in the study area, whereas the relative rates of infiltration within the study area are consistent with the distribution of natural and anthropogenic tracers such as tritium in perched and regional groundwaters. Limitations of the study are that it does not address the effects of the Cerro Grande fire on the hydrology of the study area, nor does it completely capture the complex and sometimes incompletely documented history of Laboratory generated discharges during its 60-yr history. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Kwicklis, E (reprint author), Los Alamos Natl Lab, EES-6,MS T0003, Los Alamos, NM 87545 USA. EM kwicklis@lanl.gov NR 62 TC 15 Z9 15 U1 1 U2 9 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 672 EP 693 DI 10.2136/vzj2004.0176 PG 22 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400013 ER PT J AU Robinson, BA McLin, SG Viswanathan, HS AF Robinson, BA McLin, SG Viswanathan, HS TI Hydrologic behavior of unsaturated, fractured tuff: Interpretation and modeling of a wellbore injection test SO VADOSE ZONE JOURNAL LA English DT Article ID YUCCA MOUNTAIN; POROUS-MEDIUM; FLOW; REPOSITORY; SIMULATION; TRANSPORT; NEVADA; MEDIA; SITE AB A previously reported injection zone test in the Tshirege Member of the Bandelier tuff has been interpreted and modeled using a variety of conceptual models ranging from a single continuum model (SCM) to a dual permeability model (DKM). The agreement of the numerical models and the data was quite acceptable, both qualitatively and The migration of water injected in an open interval the wellbore exhibited flow that was controlled by gravity and, to a lesser extent, capillary forces. A sensitivity analysis showed that the behavior is well captured with laboratory determined hydrologic parameters and less so if rocks with higher capillary suction are simulated. More complex model formulations that explicitly account for fractures were also tested, but it was found that these models reproduce the field behavior only when parameters are selected that minimize the role of fractures. Therefore, the SCM is favored due to its simpler formulation and ease with which it is implemented in large-scale flow and transport simulations. Discrete fracture simulations are used to illustrate that fractures are predicted to play a minor role in most subunits of the Bandelier tuff: high matrix permeability allows water entering fractures to quickly imbibe into the matrix, thereby reducing the tendency of these rocks to exhibit preferential fracture flow. In contrast, water flow through Basalts present on the Pajarito Plateau is predicted to be dominated by fractures. C1 Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Environm Stewardship Div, Los Alamos, NM 87545 USA. RP Robinson, BA (reprint author), Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. EM robinson@lanl.gov RI Robinson, Bruce/F-6031-2010 NR 26 TC 9 Z9 9 U1 1 U2 1 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 694 EP 707 DI 10.2136/vzj2004.0080 PG 14 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400014 ER PT J AU Stauffer, PH Stone, WJ AF Stauffer, PH Stone, WJ TI Surface water-groundwater connection at the Los Alamos Canyon weir site: Part 2. Modeling of tracer test results SO VADOSE ZONE JOURNAL LA English DT Article ID BASALT VADOSE ZONE; FLOW; TRANSPORT AB Field observations of bromide transport in the unsaturated zone are used to constrain simulations that provide estimates of bulk porosity and permeability for the Cerros del Rio. The Cerros del Rio basalt of particular interest because it underlies many of the potential waste sites at the Los Alamos National Laboratory. A highly simplified model is able to capture the general behavior of the breakthrough data. The simplifying assumption is that the basalt can be modeled as a homogeneous continuum with high permeability and low porosity. We estimate that the permeability of the bulk rock is 10(-11) to 10(-12) m(2), whereas the porosity is estimated to lie between 0.001 and 0.01. The porosity estimates from this study are particularly useful for kilometer-scale simulations that include flow and transport through the Cerros del Rio basalt because estimates based on other methods, such as core testing, are highly scale dependent and should not be extrapolated to larger scales. Although this model does not include the complex physics of flow in the fractured basalt, it is useful for simulations on the kilometer scale that require averaging of rock properties and optimization of computational speed. The porosity and permeability values obtained from this analysis will help to weight probability distributions used in the kilometer-scale simulations of contaminant transport. C1 Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. RP Stauffer, PH (reprint author), Los Alamos Natl Lab, Div Earth & Environm Sci, EES-6, Los Alamos, NM 87545 USA. EM stauffer@lanl.gov OI Stauffer, Philip/0000-0002-6976-221X NR 22 TC 6 Z9 6 U1 0 U2 4 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 718 EP 728 DI 10.2136/vzj2004.0121 PG 11 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400016 ER PT J AU Robinson, BA Cole, G Carey, JW Witkowski, M Gable, CW Lu, ZM Gray, R AF Robinson, BA Cole, G Carey, JW Witkowski, M Gable, CW Lu, ZM Gray, R TI A vadose zone flow and transport model for Los Alamos Canyon, Los Alamos, New Mexico SO VADOSE ZONE JOURNAL LA English DT Article AB A vadose zone flow and transport model for Los Alamos Canyon is presented that demonstrates that a comprehensive understanding of vadose zone hydrologic processes can be obtained by integrating data from geologic, hydrologic, and site characterization sources. The hydrostratigraphy of the canyon is captured using geologic characterization of extensive deep-well drilling samples, along with surface mapping. A water budget study for the surface and shallow hydrology is used to estimate spatially varying infiltration rates along the canyon. Three-dimensional flow model results show that mesa-top infiltration rates on the order of 1 mm yr(-1), and canyon-bottom rates several orders of magnitude higher, capture the water content profiles from available wells within the model domain. However, a range of a factor of three higher and lower than these mean values is also consistent with the data. Transient flow simulations show that episodic infiltration events can be effectively averaged in steady-complex state flow modeling, but transients that last on the order of a decade or more, such as climate related or anthropogenically induced transients, significantly change the predicted water content. Modeling of tritium transport through the vadose zone indicates that even for a nonsorbing contaminant, most, but not all, of the contaminant released since the past 40 yr should still be present in the vadose zone. The mass to reach the water table is primarily in locations in the canyon where the Bandelier Tuff is not present. Available ground-water surveillance data for regional aquifer water are consistent with this result. C1 Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. Daniel B Stephens Inc, Albuquerque, NM 87109 USA. RP Robinson, BA (reprint author), Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. EM robinson@lanl.gov RI Robinson, Bruce/F-6031-2010; Carey, James/B-4421-2011; Gable, Carl/B-4689-2011; OI Lu, Zhiming/0000-0001-5800-3368; Gable, Carl/0000-0001-7063-0815 NR 18 TC 6 Z9 6 U1 0 U2 3 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 729 EP 743 DI 10.2136/vzj2004.0169 PG 15 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400017 ER PT J AU Reid, KD Reneau, SL Newman, BD Hickmott, DD AF Reid, KD Reneau, SL Newman, BD Hickmott, DD TI Barium and high explosives in a semiarid alluvial system, Canon de Valle, New Mexico SO VADOSE ZONE JOURNAL LA English DT Article ID PONDEROSA PINE HILLSLOPE; NATURAL ATTENUATION; HYPORHEIC ZONE; RDX; STREAM; FATE; SOIL; GROUNDWATER; AQUIFER; HEXAHYDRO-1,3,5-TRINITRO-1,3,5-TRIAZINE AB Concentrations and distributions of Ba, a component of the high explosive baritol, and RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine), a high explosive, were evaluated from 1996 to 2002 within a semiarid alluvial system in Canon de Valle, New Mexico. A high explosive machining facility discharged effluent containing these chemicals to the canyon from 1951 to 1996. The connectivity between alluvial groundwater, surface water, and sediment was specifically addressed understand the distributions and dynamics of Ba and RDX in alluvial system. Surface water, groundwater, and sediment were characterized by conducting hydrologic measurements, geomorphic mapping, and collecting samples. Barium and RDX in sediment preferentially reside in fine-grained deposits that represent the suspended load redeposited on floodplains following channel scour. However, RDX and Ba show markedly different behaviors in surface water and alluvial groundwater because of contrasting geochemical characteristics and transport mechanisms. Barium precipitates in sediments as barite and witherite and readily sorbs to sediment minerals. Therefore, transport is an important control on its distribution in the In contrast, RDX appears to occur predominantly in the dissolved phase, behaves conservatively, and is most significant in groundwater. There is a strong correlation between RDX concentrations in water and the saturated thickness of the alluvial aquifer. During prolonged wet periods, the alluvial aquifer enlarges, causing more RDX to be mobilized within the alluvial system. Subsurface processes in the alluvial aquifer are therefore most important in controlling present RDX transport, whereas surface processes associated with floods are most important in controlling Ba transport. C1 TerranearPMC, Los Alamos, NM 87544 USA. Los Alamos Natl Lab, Environm Geol & Spatial Anal Grp, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Atmospher Climate & Environm Dynam Grp, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Hydrol Geochem & Geol Grp, Los Alamos, NM 87545 USA. RP Reid, KD (reprint author), TerranearPMC, 1911 Cent Ave, Los Alamos, NM 87544 USA. EM kreid@terranearpmc.com RI Hickmott, Donald/C-2886-2011 NR 48 TC 6 Z9 7 U1 2 U2 5 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 744 EP 759 DI 10.2136/vzj2004.0174 PG 16 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400018 ER PT J AU Stauffer, PH Birdsell, KH Witkowski, MS Hopkins, JK AF Stauffer, PH Birdsell, KH Witkowski, MS Hopkins, JK TI Vadose zone transport of 1,1,1-trichloroethane: Conceptual model validation through numerical simulation SO VADOSE ZONE JOURNAL LA English DT Article ID POROUS-MEDIA; GAS; DIFFUSION; TRICHLOROETHYLENE; SOILS AB A conceptual model is developed to better understand vadose zone vapor-phase diffusion within the mesas of the Pajarito Plateau at Los Alamos National Laboratory. We focus on 1,1,1-trichloroethane (TCA) vapor transport from a liquid-waste disposal site. The conceptual model incorporates several physical processes, including partitioning of TCA into the liquid phase, saturation-dependent diffusion, diffusion through asphalt, and interaction with the atmosphere. Three-dimensional numerical simulations that use the conceptual model of TCA transport are then calibrated to pore-gas monitoring data. Adjustable parameters in the numerical simulations are limited to (i) the vapor-phase diffusion coefficients for the different geologic units, asphalt cover, and land-atmosphere boundary layer and (ii) the fixed concentrations in the two shaft clusters. By including all of the components of the conceptual model in our numerical simulations we were able to achieve a reasonable match between the simulated plume and site data for two alternate conceptual models of asphalt, one with asphalt as a diffusive and one without asphalt as a diffusive barrier. A goodness-of-fit analysis shows that the best-fit simulations are highly correlated to 132 data points from 21 boreholes. The simulations demonstrate that diffusive behavior describes the general characteristics of the current subsurface vapor plume. Effective vapor-phase diffusion coefficients used in the simulations that best fit the data suggest that barometric pumping is not contributing to diffusion in the deep vadose zone; however, it is likely that barometric pumping is occurring in fractures near the mesa edge. We conclude that asphalt is most likely acting as a barrier to diffusion at this site. The numerical simulations validate the conceptual model developed for this study is a useful tool for analyzing TCA transport within the mesas of the Pajarito Plateau. C1 Los Alamos Natl Lab, Div Earth & Environm Sci, Geol Hydrol & Geochem Grp EES6, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Earth & Environm Sci, Environm Geol & Spatial Anal Grp EES9, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Risk Reduct & Environm Sci Div, Environm Characterizat & Remediat Grp RRES ECR, Los Alamos, NM 87545 USA. RP Stauffer, PH (reprint author), Los Alamos Natl Lab, Div Earth & Environm Sci, Geol Hydrol & Geochem Grp EES6, Los Alamos, NM 87545 USA. EM stauffer@lanl.gov OI Stauffer, Philip/0000-0002-6976-221X NR 46 TC 11 Z9 12 U1 0 U2 3 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 760 EP 773 DI 10.2136/vzj2004.0120 PG 14 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400019 ER PT J AU McLin, SG Newman, BD Broxton, DE AF McLin, SG Newman, BD Broxton, DE TI Vadose zone characterization and monitoring beneath waste disposal pits using horizontal boreholes SO VADOSE ZONE JOURNAL LA English DT Article ID BAROMETRIC-PRESSURE CYCLES; YUCCA MOUNTAIN; WATER-MOVEMENT; DESERT SOILS; NEW-MEXICO; TEST-SITE; TRANSPORT; NEVADA; FLOW; FIELD AB Vadose zone characterization and monitoring immediately below landfills using horizontal boreholes is an emerging technology. However, this topic has received little attention in the peer-reviewed literature. The value of this approach is that activities are conducted below the waste, providing clear and rapid verification of containment. Here report on two studies that examined the utility of horizontal boreholes for environmental characterization and monitoring under radioactive waste disposal pits. Both studies used core sample analyses to determine the presence of various radionuclides, organic compounds, or metals. At one borehole site, water content and pore-water chloride concentrations were also used to interpret vadose zone behavior. At another site, we examined the feasibility of using flexible membrane liners in uncased boreholes for periodic monitoring. For this demonstration, these retrievable liners were air-injected into boreholes on multiple occasions carrying different instrument packages for environmental surveillance. These included a neutron logging device to measure volumetric water at regular intervals, high-absorbency collectors that wicked available water from borehole walls, or vent tubes that used to measure air permeability and collect air samples. The flexible and retrievable liner system was an effective way to monitor water content and measure in situ air permeability. The high-absorbency collectors were efficient at extracting liquid water for contaminant analyses even at volumetric water contents below 10%, and revealed tritium migration below one disposal pit. Both demonstration studies proved that effective characterization and periodic monitoring in horizontal boreholes is both feasible and adaptable to many waste disposal problems and locations. C1 Los Alamos Natl Lab, Water Qual & Hydrol Grp, Los Alamos, NM 87544 USA. Los Alamos Natl Lab, Atmospher Climate & Environm Dynam Grp, Los Alamos, NM 87544 USA. Los Alamos Natl Lab, Hydrol Geochem & Geol Grp, Los Alamos, NM 87544 USA. RP McLin, SG (reprint author), Los Alamos Natl Lab, Water Qual & Hydrol Grp, POB 1663,Mail Stop K497, Los Alamos, NM 87544 USA. EM sgm@lanl.gov NR 60 TC 5 Z9 5 U1 0 U2 5 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 774 EP 788 DI 10.2136/vzj2004.0106 PG 15 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400020 ER PT J AU Levitt, DG Hartmann, MJ Kisiel, KC Criswell, CW Farley, PD Christensen, C AF Levitt, DG Hartmann, MJ Kisiel, KC Criswell, CW Farley, PD Christensen, C TI Comparison of the water balance of an asphalt cover and an evapotranspiration cover at technical area 49 at the Los Alamos National Laboratory SO VADOSE ZONE JOURNAL LA English DT Article AB Two different types of waste covers, an asphalt cap and an evapotranspiration (ET) cover, have been used to contain a contaminated site at Technical Area (TA) 49 at the Los Alamos National Laboratory (LANL). In 1961, a 2.5- to 20-cm-thick asphalt cap and gravel and clay cover was constructed to isolate contamination of surface soils associated with subcritical hydronuclear safety experiments conducted at TA-49 between 1959 and 1961. The asphalt cap remained in place for 37 yr until 1998 when it was replaced with an ET cover. Cracks and subsidence features in the asphalt cap were periodically filled during that time. The thickness of the ET cover is 2.1 m at its center, tapering to zero thickness at its edges. The ET cover is instrumented with three neutron logging access tubes, and four time domain reflectometry (TDR) probes, and covered by a galvanized steel mesh bio-intrusion layer. Soil moisture monitoring was conducted immediately after the removal of the asphalt cap in 1998, and continuously since 1999 within the ET cover, providing a unique comparison of the performance of these cap and cover types at a semiarid site. Soil moisture monitoring results indicate that the soils within and beneath ET cover have been drying since its installation, and infiltration of precipitation and snowmelt has been minimized. The replacement of the asphalt cap with the ET cover has significantly decreased shallow subsurface moisture contents. With continued growth of vegetation and increased transpiration, the site should continue its return to native conditions where net infiltration and associated groundwater recharge rates are <7 mm yr(-1). C1 Apogen Technol Inc, Energy & Environm Engn Div, Los Alamos, NM 87544 USA. Los Alamos Natl Lab, Risk Reduct & Environm Stewardship Remediat Serv, Los Alamos, NM 87545 USA. RP Levitt, DG (reprint author), Apogen Technol Inc, Energy & Environm Engn Div, 1350 Cent Ave,3rd Floor, Los Alamos, NM 87544 USA. EM daniel.levitt@apogentech.com NR 13 TC 3 Z9 3 U1 0 U2 3 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 789 EP 797 DI 10.2136/vzj2004.0171 PG 9 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400021 ER PT J AU Breshears, DD Nyhan, JW Davenport, DW AF Breshears, DD Nyhan, JW Davenport, DW TI Ecohydrology monitoring and excavation of semiarid landfill covers a decade after installation SO VADOSE ZONE JOURNAL LA English DT Article ID PONDEROSA PINE HILLSLOPE; PINYON-JUNIPER WOODLAND; WASTE-BURIAL SITE; WATER-BALANCE; POCKET GOPHERS; SOIL-MOISTURE; GRASSLAND/FOREST CONTINUUM; SPATIAL-PATTERN; LONG-TERM; EROSION AB Landfill covers are intended to protect buried waste from water seepage and biointrusion for thirty to thousands of years, yet most cover studies are limited to a few years and do not directly investigate changes in the soil profile that affect changing landfill performance. We evaluated water balances, vegetation cover, rooting patterns, and soil profiles of two landfill-cover designs (two plots each) more than a decade after installation at semiarid Los Alamos National Laboratory, NM, USA: a conventional design of 20 cm of topsoil over compacted crushed-tuff and an integrated design of 71 cm of topsoil over an engineered barrier designed to induce lateral flow (geotextile overlying 46 cm of gravel). Water balances for both designs had similar to 3% of precipitation as seepage; the integrated plots lost <1% of water as interflow, probably because the barrier interface had only a 5% slope. The conventional design had a net loss of stored soil water and proportionally more evapotranspiration than the integrated design. After more than a decade, (i) vegetation changes included increased biomass and species diversity on most plots, with proportionally fewer invading species and more extensive rooting in the integrated plots; (ii) the geotextile was largely unchanged; and (iii) infiltration and subsequent water penetration occurred primarily via macropores, including root channels and animal burrows. Both cover designs effectively minimized seepage during their initial decade, but observed effects of environmental processes such as succession and burrowing are expected to become progressively more important determinants of cover performance over additional decades. C1 Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ecol Grp, Risk Reduct & Environm Stewardship Div, Los Alamos, NM 87545 USA. RP Breshears, DD (reprint author), Univ Arizona, Sch Nat Resources, Inst Study Planet Earth, Tucson, AZ 85721 USA. EM daveb@ag.arizona.edu RI Breshears, David/B-9318-2009 OI Breshears, David/0000-0001-6601-0058 NR 74 TC 13 Z9 13 U1 0 U2 11 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 798 EP 810 DI 10.2136/vzj2004.0038 PG 13 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400022 ER PT J AU Martens, SN Breshears, DD AF Martens, SN Breshears, DD TI Assessing contaminant transport vulnerability in complex topography using a distributed hydrologic model SO VADOSE ZONE JOURNAL LA English DT Article ID PONDEROSA PINE HILLSLOPE; PINYON-JUNIPER WOODLAND; EROSION; RUNOFF; VEGETATION AB Modeling of vadose zone hydrology is required to address a variety of applied problems in general and risk assessments associated with contaminants in particular. Risk assessments increasingly must focus on multisite, multipathway analyses as opposed to single-site, single pathway analyses. Such assessments can be particularly challenging when contaminants are widely dispersed in complex topography. Here highlight how a set of contaminated sites situated within complex topography can be effectively prioritized relative to vulnerability of contaminant transport from surface and subsurface flows. We used a distributed hydrologic model, SPLASH, to assess the lateral flows of surface and subsurface water following the simulation of a 100-year precipitation event, which could correspond to an intense thunder-storm. Our case study was conducted in the North Ancho watershed of Los Alamos National Laboratory, in northern New Mexico, USA, an area with widely dispersed contaminants and diverse topography. Simulated surface flows generally exceeded subsurface flows by more than four orders of magnitude, indicating the relative importance of redistribution of contaminants by surface flows for this type precipitation event. For the 18 potential contaminant release sites the maximum surface flow varied by more than an order of magnitude across the sites. Half of the sites had surface flows <25% of the maximum surface flow for a site, allowing for prioritization of those sites with the greatest vulnerability. Our results highlight how risks of contaminant transport can be effectively assessed in complex topography using distributed hydrologic modeling. C1 Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 USA. Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. RP Breshears, DD (reprint author), Univ Arizona, Sch Nat Resources, Inst Study Planet Earth, Tucson, AZ 85721 USA. EM daveb@ag.arizona.edu RI Breshears, David/B-9318-2009 OI Breshears, David/0000-0001-6601-0058 NR 26 TC 3 Z9 3 U1 0 U2 2 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 811 EP 818 DI 10.2136/vzj2004-0037 PG 8 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400023 ER PT J AU Tartakovsky, AM Meakin, P AF Tartakovsky, AM Meakin, P TI Simulation of unsaturated flow in complex fractures using smoothed particle hydrodynamics SO VADOSE ZONE JOURNAL LA English DT Article ID APPLIED MECHANICS; SURFACE-TENSION; POROUS-MEDIA; DROPS; MODEL; SPH AB Smoothed particle hydrodynamics (SPH) models were used to simulate unsaturated flow in fractures with complex geometries. The SPH is a fully Lagrangian particle-based method that allows the dynamics of interfaces separating fluids to be modeled without employing complex front tracking schemes. In SPH simulations, the fluid density field is represented by a superposition of weighting functions centered on particles which represent the fluids. The pressure is related the fluid density through an equation of state, and the particles move in response to the pressure gradient. The SPH does not require the construction of grids that would otherwise introduce numerical dispersion. The model can be used to simulate complex free-surface flow phenomenon such as invasion of wetting and nonwetting fluids into three-dimensional fractures. These processes are a severe challenge for grid-based methods. Surface tension was simulated by using a van der Waals equation of state and a combination of short-range repulsive and longer-range attractive interactions between fluid particles. The wetting behavior was simulated using similar interactions between mobile fluid particles and stationary boundary particles. The fracture geometry was generated from self-affine fractal surfaces. The fractal model was based on a large body of experimental work, which indicates that fracture surfaces have a self-affine fractal geometry characterized by a material independent (quasi universal) Hurst exponent of about 0.75. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA. RP Tartakovsky, AM (reprint author), Pacific NW Natl Lab, POB 999,MS K1-85, Richland, WA 99352 USA. EM Alexandre.Tartakovsky@pnl.gov NR 18 TC 36 Z9 36 U1 0 U2 9 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 1539-1663 J9 VADOSE ZONE J JI Vadose Zone J. PD AUG PY 2005 VL 4 IS 3 BP 848 EP 855 DI 10.2136/vzj2004.0178 PG 8 WC Environmental Sciences; Soil Science; Water Resources SC Environmental Sciences & Ecology; Agriculture; Water Resources GA 957GS UT WOS:000231358400027 ER PT J AU Kim, Y Teslow, HL Park, J Rosocha, LA Herrmann, HW AF Kim, Y Teslow, HL Park, J Rosocha, LA Herrmann, HW TI CF4/O-2/He reaction chemistry in an atmospheric pressure plasma jet SO JOURNAL OF ADVANCED OXIDATION TECHNOLOGIES LA English DT Article; Proceedings Paper CT 4th International Symposium on Non-Thermal Plasma Technology for Pollution Control Sustainable Energy Development (ISNTPT-4) CY MAY 10-14, 2004 CL Panama City Beach, FL SP Natl Sci Fdn, Hitachi Inc, Fl Dept Environm Protect, WRS Infrastruct & Environm Inc ID DISCHARGE; KINETICS; HELIUM AB An atmospheric pressure plasma jet (APPJ) operated with a CF4/O-2/He gas mixture has recently been demonstrated to decontaminate actinide materials such as plutonium and uranium. However, a comprehensive study of the chemical kinetics for an atmospheric plasma containing CF4/O-2/He does not exist. To understand and optimize the decontamination process, ultraviolet (UV) absorption spectroscopy was employed to measure chemically active species, such as dioxygen fluoride (O2F) and ozone (O-3), inside and outside the APPJ. At room temperature operation, O2F was found to be a significant long-lived radical, which lasted up to 10 ms in the effluent with a density of about 10(15) cm(-3). The concentration of O-3 does not fall off and keeps its density constant up to 10 ms, which indicates the absence of atomic fluorine (F) outside the APPJ. Measurements were in good agreement with a gas-phase post-plasma simulation. In summary, atomic fluorine produced inside the APPJ recombines with O-2 molecules, producing O2F molecules, which can live long enough to etch metal surfaces. C1 Los Alamos Natl Lab, Plasma Phys Grp, Los Alamos, NM 87545 USA. APJeT Inc, Santa Fe, NM 87507 USA. RP Los Alamos Natl Lab, Plasma Phys Grp, POB 1663, Los Alamos, NM 87545 USA. EM rosocha@lanl.gov NR 18 TC 3 Z9 3 U1 0 U2 3 PU SYCAMORE GLOBAL PUBLICATIONS LLC PI TERRE HAUTE PA 6815 E MANOR DR, TERRE HAUTE, IN 47802 USA SN 1203-8407 J9 J ADV OXID TECHNOL JI J. Adv. Oxid. Technol. PD JUL 31 PY 2005 VL 8 IS 2 BP 182 EP 187 PG 6 WC Chemistry, Physical SC Chemistry GA 949QS UT WOS:000230803800009 ER PT J AU Kim, Y Stange, SM Rosocha, LA Ferreri, VW AF Kim, Y Stange, SM Rosocha, LA Ferreri, VW TI Enhancement of propane flame stability by dielectric barrier discharges SO JOURNAL OF ADVANCED OXIDATION TECHNOLOGIES LA English DT Article; Proceedings Paper CT 4th International Symposium on Non-Thermal Plasma Technology for Pollution Control Sustainable Energy Development (ISNTPT-4) CY MAY 10-14, 2004 CL Panama City Beach, FL SP Natl Sci Fdn, Hitachi Inc, Fl Dept Environm Protect, WRS Infrastruct & Environm Inc ID CROSS-SECTIONS; ELECTRON COLLISIONS; COMBUSTION AB Non-thermal plasmas have recently found novel applications in improving fuel combustion. Typical electron temperatures in such plasmas are of order a few electron volts. Such electrons are sufficient to break down fuel molecules and to produce free radicals which mad significantly affect combustion efficiency. In this work, we use a dielectric barrier discharge (DBD) to activate propane (C3H8) fuel before it is mixed with air and ;ignited. The use of activated propane enables us to operate combustion in very lean-burn conditions; for 0.2 lpm propane, air flow was 38 lpm, compared with an air flow of 26 lpm in the absence of a plasma. A residual gas analyzer (RGA) measures the decomposition products of the propane discharge, indicating that atomic and molecular hydrogen are produced in the plasma and that their concentrations depend on the DBD energy density. Based on the observations discussed in this work, we have shown that by activating propane, the DBD increases combustion stability. C1 Los Alamos Natl Lab, Plasma Phys Grp, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Plasma Phys Grp, POB 1663, Los Alamos, NM 87545 USA. EM rosocha@lanl.gov NR 12 TC 8 Z9 8 U1 0 U2 6 PU SYCAMORE GLOBAL PUBLICATIONS LLC PI TERRE HAUTE PA 6815 E MANOR DR, TERRE HAUTE, IN 47802 USA SN 1203-8407 J9 J ADV OXID TECHNOL JI J. Adv. Oxid. Technol. PD JUL 31 PY 2005 VL 8 IS 2 BP 188 EP 192 PG 5 WC Chemistry, Physical SC Chemistry GA 949QS UT WOS:000230803800010 ER PT J AU Teghil, R D'Alessio, L De Bonis, A Galasso, A Villani, P Zaccagnino, M Santagata, A Sordelet, DJ AF Teghil, R D'Alessio, L De Bonis, A Galasso, A Villani, P Zaccagnino, M Santagata, A Sordelet, DJ TI Ultrashort pulsed laser vaporisation of icosahedral Al-Pd-Mn SO APPLIED SURFACE SCIENCE LA English DT Article; Proceedings Paper CT 4th International Conference on Photo-Excited Processes and Applications CY SEP 05-09, 2004 CL Lecce, ITALY DE laser ablation; laser deposition; quasicrystals ID THIN-FILMS; ABLATION; DEPOSITION; PHASE AB In this work, Al70Pd20Mn10 quasicrystalline targets were evaporated by a doubled Nd:glass laser with a pulse duration of 250 fs. The produced plasma has been analysed by time of flight mass spectrometry, optical emission spectroscopy and fast imaging. The results indicate that the plume is more complex as compared to other quasi crystalline systems with the presence of quite large clusters and with a higher ionisation degree. The analyses on the deposited films indicate that the vaporisation is not congruent. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Basilicata, Dipartimento Chim, I-85100 Potenza, Italy. CNR, IMIP, Tito, Italy. Iowa State Univ, Ames Lab, Met & Ceram Sci Program, Ames, IA USA. RP Teghil, R (reprint author), Univ Basilicata, Dipartimento Chim, Via N Sauro 85, I-85100 Potenza, Italy. EM teghil@unibas.it OI TEGHIL, ROBERTO/0000-0002-8528-8669; De Bonis, Angela/0000-0002-1177-2896; Santagata, Antonio/0000-0002-1409-3135 NR 17 TC 5 Z9 5 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-4332 J9 APPL SURF SCI JI Appl. Surf. Sci. PD JUL 30 PY 2005 VL 248 IS 1-4 BP 304 EP 308 DI 10.1016/j.apsusc.2005.03.038 PG 5 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA 943AZ UT WOS:000230325400060 ER PT J AU Stock, GM Granger, DE Sasowsky, ID Anderson, RS Finkel, RC AF Stock, GM Granger, DE Sasowsky, ID Anderson, RS Finkel, RC TI Comparison of U-Th, paleomagnetism, and cosmogenic burial methods for dating caves: Implications for landscape evolution studies SO EARTH AND PLANETARY SCIENCE LETTERS LA English DT Article DE geochronology; Uranium-series; paleomagnetism; cosmogenic nuclides; caves; landscape evolution; Sierra Nevada ID SIERRA-NEVADA; ALLUVIAL SEDIMENT; FLUVIAL TERRACES; SPELEOTHEM DATES; LIMESTONE CAVES; STREAM-INCISION; UPLIFT RATES; MAMMOTH CAVE; WIND RIVER; HALF-LIFE AB Caves are useful in landscape evolution studies because they often mark the level of previous water tables and, when dated, yield incision rates. Dating caves is problematic, however, because their ages are only constrained by the oldest deposits contained within, which may be far younger than the cave itself. We dated cave deposits in the Sierra Nevada using U-Th dating of speleothems, paleomagnetic dating of fine sediment, and cosmogenic Al-26/Be-10 burial dating of coarse sediment. The sampled caves formed sequentially as the water table lowered, providing an important stratigraphic test for the dating methods. Large discrepancies between deposit ages from similar cave levels demonstrate that, even when accurately determined, deposit ages can seriously underestimate the timing of cave development. Drip-type speleothems are most prone to this minimum age bias because they can accumulate long after caves form, and because the U-Th method is limited to similar to 400 ka. Paleomagnetic dating requires correlation with the global reversal chronology, and is hindered by a lack of continuous stratigraphy. The fine sediment analyzed for paleomagnetism is also highly susceptible to remobilization and deposition in cave passages well above base level. Cosmogenic Al-26/Be-10 dates bedload material deposited when caves were at or very near river level, and can date material as old as similar to 5 Ma. In the Sierra Nevada, speleothem U-Th ages and sediment burial ages from the same cave levels differ by as much as an order of magnitude. These results suggest speleothem ages alone may significantly underestimate cave ages and thereby overestimate rates of landscape evolution. Cosmogenic burial dating of coarse elastic sediment appears to be the most reliable method for dating cave development in mountainous regions. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95064 USA. Purdue Univ, Dept Earth & Atmospher Sci, W Lafayette, IN 47907 USA. Univ Akron, Dept Geol, Off Terr Records & Environm Change, Akron, OH 44325 USA. Univ Akron, Ctr Environm Studies, Akron, OH 44325 USA. Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA. Univ Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309 USA. Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry & Geosci & Envi, Livermore, CA 94550 USA. RP Univ Michigan, Dept Geol Sci, 1006 CC Little Bldg, Ann Arbor, MI 48109 USA. EM gstock@umich.edu; dgranger@purdue.edu; ids@uakron.edu; andersrs@colorado.edu; finkel1@llnl.gov NR 54 TC 45 Z9 47 U1 0 U2 13 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0012-821X EI 1385-013X J9 EARTH PLANET SC LETT JI Earth Planet. Sci. Lett. PD JUL 30 PY 2005 VL 236 IS 1-2 BP 388 EP 403 DI 10.1016/j.epsl.2005.04.024 PG 16 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 958GM UT WOS:000231432700029 ER PT J AU Gosling, JT Skoug, RM Haggerty, DK McComas, DJ AF Gosling, JT Skoug, RM Haggerty, DK McComas, DJ TI Absence of energetic particle effects associated with magnetic reconnection exhausts in the solar wind SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID ADVANCED COMPOSITION EXPLORER; ALPHA MONITOR; ELECTRON; PROTON; ACCELERATION; INJECTIONS; SUBSTORM AB We have examined energetic particle data (> 38 keV for electrons and > 47 keV for protons) obtained in intervals surrounding a set of 7 encounters with Petschek-type reconnection exhausts in the solar wind by the Advanced Composition Explorer. We find no evidence for any substantial increases in energetic particle intensity associated with those encounters. This indicates that local reconnection is not a significant source of energetic particles in the solar wind and suggests the possibility that reconnection itself may not be a particularly effective process for populating other space and astrophysical environments with energetic particles. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA. SW Res Inst, San Antonio, TX 78228 USA. RP Gosling, JT (reprint author), Los Alamos Natl Lab, MS D466, Los Alamos, NM 87545 USA. EM jack.gosling@lasp.colorado.edu NR 16 TC 67 Z9 67 U1 1 U2 8 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD JUL 30 PY 2005 VL 32 IS 14 AR L14113 DI 10.1029/2005GL023357 PG 4 WC Geosciences, Multidisciplinary SC Geology GA 951MR UT WOS:000230935100005 ER PT J AU Arsene, I Bearden, IG Beavis, D Besliu, C Budick, B Boggild, H Chasman, C Christensen, CH Christiansen, P Cibor, J Debbe, R Enger, E Gaardhoje, JJ Germinario, M Hagel, K Ito, H Jipa, A Jordre, JI Jundt, F Jorgensen, CE Karabowicz, R Kim, EJ Kozik, T Larsen, TM Lee, JH Lee, YK Lindal, S Lystad, R Lovhoiden, G Majka, Z Makeev, A Mikelsen, M Murray, M Natowitz, J Neuman, B Nielsen, BS Ouerdane, D Planeta, R Rami, F Ristea, C Ristea, O Rohrich, D Samset, BH Sandberg, D Sanders, SJ Sheetz, RA Staszel, P Tveter, TS Videbaek, F Wada, R Yin, Z Zgura, IS AF Arsene, I Bearden, IG Beavis, D Besliu, C Budick, B Boggild, H Chasman, C Christensen, CH Christiansen, P Cibor, J Debbe, R Enger, E Gaardhoje, JJ Germinario, M Hagel, K Ito, H Jipa, A Jordre, JI Jundt, F Jorgensen, CE Karabowicz, R Kim, EJ Kozik, T Larsen, TM Lee, JH Lee, YK Lindal, S Lystad, R Lovhoiden, G Majka, Z Makeev, A Mikelsen, M Murray, M Natowitz, J Neuman, B Nielsen, BS Ouerdane, D Planeta, R Rami, F Ristea, C Ristea, O Rohrich, D Samset, BH Sandberg, D Sanders, SJ Sheetz, RA Staszel, P Tveter, TS Videbaek, F Wada, R Yin, Z Zgura, IS TI Recent results from the BRAHMS experiment at RHIC SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A LA English DT Article; Proceedings Paper CT 8th Workshop on Non-Perturbative Quantum Chromodynamics CY JUN 07-11, 2004 CL Paris, FRANCE ID NUCLEUS-NUCLEUS COLLISIONS; BARYON RAPIDITY LOSS; PLUS AU COLLISIONS; 0.9 TEV; DISTRIBUTIONS; QCD AB We present the results obtained by the BRAHMS experiment at the Relativistic Heavy Ion Collider (RHIC) for three colliding systems, namely: An + An, d + An and p + p at root SNN = 200 GeV. The main focus here is to give an overview of the main results on the reaction dynamics and on the properties of hot and high energy density matter produced in utra-relativistic heavy ion collisions. Measurement of particle production, particle spectra over a large rapidity interval as well as high pt measurements related to nuclear modification in An + An and d + An collision are discussed. The observed number of charged particles produced per unit of rapidity at the central rapidity region indicates that a high energy density ( > 5 GeV/fm(3)) system is created at the initial stage of the An + An reaction. From the particle spectra we deduced significant radial expansion (beta approximate to 0.75) which is consistent with the large initial energy density. For An + An at eta = 0 we observe the suppression of the high PT particles as compared to the elementary collisions, whereas for the d + An reaction the Cronin type enhancement is observed. We also discuss to what extent these results can be taken as evidence for the quark gluon plasma (QGP). Finally, we present the nuclear modification effects in d + An reaction as a function of rapidity and consider whether the observed suppression at forward rapidities constitutes sufficient evidence for a possible precursor state to the QGP, i.e. the Color Glass Condensate (CGC). C1 Jagiellonian Univ, Inst Phys, PL-30059 Krakow, Poland. Brookhaven Natl Lab, Upton, NY 11973 USA. Inst Rech Subatom, Strasbourg, France. Univ Strasbourg 1, Strasbourg, France. Inst Nucl Phys, Krakow, Poland. Johns Hopkins Univ, Baltimore, MD 21218 USA. NYU, New York, NY 10003 USA. Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark. Texas A&M Univ, College Stn, TX 77843 USA. Univ Bergen, Dept Phys, Bergen, Norway. Univ Bucharest, Bucharest, Romania. Univ Kansas, Lawrence, KS 66049 USA. Univ Oslo, Dept Phys, Oslo, Norway. RP Arsene, I (reprint author), Jagiellonian Univ, Inst Phys, Ul Reymonta 4, PL-30059 Krakow, Poland. EM ufstasze@if.uj.edu.pl RI Christensen, Christian Holm/A-4901-2010; Christensen, Christian/D-6461-2012; Bearden, Ian/M-4504-2014; Samset, Bjorn H./B-9248-2012; OI Christensen, Christian Holm/0000-0002-1850-0121; Christensen, Christian/0000-0002-1850-0121; Bearden, Ian/0000-0003-2784-3094; Samset, Bjorn H./0000-0001-8013-1833; Gaardhoje, Jens-Jorgen/0000-0001-6122-4698 NR 29 TC 1 Z9 1 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0217-751X J9 INT J MOD PHYS A JI Int. J. Mod. Phys. A PD JUL 30 PY 2005 VL 20 IS 19 BP 4369 EP 4379 PG 11 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 962WN UT WOS:000231764100003 ER PT J AU Castillo, J AF Castillo, J CA STAR Collaboration TI STAR highlights SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A LA English DT Article; Proceedings Paper CT 8th Workshop on Non-Perturbative Quantum Chromodynamics CY JUN 07-11, 2004 CL Paris, FRANCE ID HEAVY-ION COLLISIONS; ROOT(S)(NN)=200 GEV; AU+AU COLLISIONS; ELLIPTIC FLOW; INTERFEROMETRY; PREDICTIONS; DEPENDENCE AB We present selected results from the STAR collaboration at RHIC. Recent results on jetlike correlations and nuclear modification factors of identified hadrons at intermediate and transverse momentum are discussed. The expansion of the created system is characterized by the measurements of two particle interferometry and the transverse elliptic flow of multi-strange baryons Xi and Omega. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Castillo, J (reprint author), Univ Utrecht, Utrecht, Netherlands. EM JECastillo@lbl.gov NR 32 TC 4 Z9 4 U1 0 U2 2 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0217-751X EI 1793-656X J9 INT J MOD PHYS A JI Int. J. Mod. Phys. A PD JUL 30 PY 2005 VL 20 IS 19 BP 4380 EP 4386 DI 10.1142/S0217751X05027953 PG 7 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 962WN UT WOS:000231764100004 ER PT J AU Back, BB Baker, MD Ballintijn, M Barton, DS Betts, RR Bickley, AA Bindel, R Budzanowski, A Busza, W Carroll, A Chai, Z Decowski, MP Garcia, E Gburek, T George, N Gulbrandsen, K Gushue, S Halliwell, C Hamblen, J Hauer, M Heintzelman, GA Henderson, C Hofman, DJ Hollis, RS Holynski, R Holzman, B Iordanova, A Johnson, E Kane, JL Katzy, J Khan, N Kucewicz, W Kulinich, P Kuo, CM Lin, WT Manly, S McLeod, D Mignerey, AC Nouicer, R Olszewski, A Pak, R Park, IC Pernegger, H Reed, C Remsberg, LP Reuter, M Roland, C Roland, G Rosenberg, L Sagerer, J Sarin, P Sawicki, P Seals, H Sedykh, I Skulski, W Smith, CE Stankiewicz, MA Steinberg, P Stephans, GSF Sukhanov, A Tang, JL Tonjes, MB Trzupek, A Vale, C van Nieuwenhuizen, GJ Vaurynovich, SS Verdier, R Veres, GI Wenger, E Wolfs, FLH Wosiek, B Wozniak, K Wuosmaa, AH Wyslouch, B AF Back, BB Baker, MD Ballintijn, M Barton, DS Betts, RR Bickley, AA Bindel, R Budzanowski, A Busza, W Carroll, A Chai, Z Decowski, MP Garcia, E Gburek, T George, N Gulbrandsen, K Gushue, S Halliwell, C Hamblen, J Hauer, M Heintzelman, GA Henderson, C Hofman, DJ Hollis, RS Holynski, R Holzman, B Iordanova, A Johnson, E Kane, JL Katzy, J Khan, N Kucewicz, W Kulinich, P Kuo, CM Lin, WT Manly, S McLeod, D Mignerey, AC Nouicer, R Olszewski, A Pak, R Park, IC Pernegger, H Reed, C Remsberg, LP Reuter, M Roland, C Roland, G Rosenberg, L Sagerer, J Sarin, P Sawicki, P Seals, H Sedykh, I Skulski, W Smith, CE Stankiewicz, MA Steinberg, P Stephans, GSF Sukhanov, A Tang, JL Tonjes, MB Trzupek, A Vale, C van Nieuwenhuizen, GJ Vaurynovich, SS Verdier, R Veres, GI Wenger, E Wolfs, FLH Wosiek, B Wozniak, K Wuosmaa, AH Wyslouch, B CA PHOBOS Collaboration TI Ultra-relativistic Au+Au and d+Au collisions: Experimental studies by PHOBOS SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A LA English DT Article; Proceedings Paper CT 8th Workshop on Non-Perturbative Quantum Chromodynamics CY JUN 07-11, 2004 CL Paris, FRANCE DE relativistic heavy-ion reactions ID CHARGED-PARTICLE MULTIPLICITY; SUPERDENSE MATTER; ENERGIES; DISTRIBUTIONS; QCD AB In this talk I will review PHOBOS data on charged particle multiplicities, obtained in Au+Au and d+Au collisions at RHIC. The general features of the Au+Au pseudorapidity distributions results will be discussed and compared to those of pp collisions. The total charged particle multiplicity, scaled by the number of participant pairs, is observed to be about 40% higher in Au+Au collisions than in pp and d+Au systems, but, surprisingly at the same level of e(+)e(-) collisions. Limiting fragmentation scaling is seen to be obeyed in Au+Au collisions. C1 Argonne Natl Lab, Argonne, IL 60439 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. PAN, Inst Nucl Phys, Krakow, Poland. MIT, Cambridge, MA 02139 USA. Natl Cent Univ, Chungli 32054, Taiwan. Univ Illinois, Chicago, IL 60607 USA. Univ Maryland, College Pk, MD 20742 USA. Univ Rochester, Rochester, NY 14627 USA. RP Back, BB (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM back@anl.gov RI Decowski, Patrick/A-4341-2011; Mignerey, Alice/D-6623-2011 NR 25 TC 0 Z9 0 U1 1 U2 2 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0217-751X J9 INT J MOD PHYS A JI Int. J. Mod. Phys. A PD JUL 30 PY 2005 VL 20 IS 19 BP 4405 EP 4411 DI 10.1142/S0217751X05027990 PG 7 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 962WN UT WOS:000231764100008 ER PT J AU Pisarski, RD AF Pisarski, RD TI Gross-Witten point and deconfinement SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A LA English DT Article; Proceedings Paper CT 8th Workshop on Non-Perturbative Quantum Chromodynamics CY JUN 07-11, 2004 CL Paris, FRANCE DE temperature; deconfinement; Gross-Witten ID POLYAKOV LOOP; TRANSITION AB Following Aharony et al., we analyze the deconfining phase transition in a SU(infinity) gauge theory in mean field approximation. The Gross-Witten model emerges as an "ultra"-critical point for deconfinement: while thermodynamically of first order, masses vanish, asymmetrically, at the transition. Potentials for N = 3 are also shown. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Niels Bohr Inst, DK-2100 Copenhagen, Denmark. Univ Frankfurt, Frankfurt Inst Adv Study, D-60054 Frankfurt, Germany. RP Pisarski, RD (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM pisarski@quark.phy.bnl.gov NR 17 TC 1 Z9 1 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0217-751X J9 INT J MOD PHYS A JI Int. J. Mod. Phys. A PD JUL 30 PY 2005 VL 20 IS 19 BP 4469 EP 4474 DI 10.1142/S0217751X05028089 PG 6 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 962WN UT WOS:000231764100017 ER PT J AU Parsons, J Holmes, JB Rojas, JM Tsai, J Strauss, CEM AF Parsons, J Holmes, JB Rojas, JM Tsai, J Strauss, CEM TI Practical conversion from torsion space to Cartesian space for in silico protein synthesis SO JOURNAL OF COMPUTATIONAL CHEMISTRY LA English DT Article DE conversion; torsion space; Cartesian space; protein synthesis ID STRUCTURE PREDICTION; ROBETTA SERVER AB Many applications require a method for translating a large list of bond angles and bond lengths to precise atomic Cartesian coordinates. This simple but computationally consuming task occurs ubiquitously in modeling proteins, DNA, and other polymers as well as in many other fields such as robotics. To find an optimal method, algorithms can be compared by a number of operations, speed, intrinsic numerical stability, and parallelization. We discuss five established methods for growing a protein backbone by serial chain extension from bond angles and bond lengths. We introduce the Natural Extension Reference Frame (NeRF) method developed for Rosetta's chain extension subroutine, as well as an improved implementation. In comparison to traditional two-step rotations, vector algebra, or Quaternion product algorithms, the NeRF algorithm is superior for this application: it requires 47% fewer floating point operations, demonstrates the best intrinsic numerical stability, and offers prospects for parallel processor acceleration. The NeRF formalism factors the mathematical operations of chain extension into two independent terms with orthogonal subsets of the dependent variables; the apparent irreducibility of these factors hint that the minimal operation set may have been identified. Benchmarks are made on Intel Pentium and Motorola PowerPC CPUs. (c) 2005 Wiley Periodicals, Inc. C1 Texas A&M Univ, Texas Agr Expt Stn, College Stn, TX 77843 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Strauss, CEM (reprint author), Texas A&M Univ, Texas Agr Expt Stn, College Stn, TX 77843 USA. EM cems@lanl.gov OI Parsons, Jerod/0000-0002-4184-343X NR 14 TC 22 Z9 22 U1 1 U2 5 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 JUL 30 PY 2005 VL 26 IS 10 BP 1063 EP 1068 DI 10.1002/jcc.20237 PG 6 WC Chemistry, Multidisciplinary SC Chemistry GA 934IQ UT WOS:000229702900010 PM 15898109 ER PT J AU Weinberger, LS Burnett, JC Toettcher, JE Arkin, AP Schaffer, DV AF Weinberger, LS Burnett, JC Toettcher, JE Arkin, AP Schaffer, DV TI Stochastic gene expression in a lentiviral positive-feedback loop: HIV-1 Tat fluctuations drive phenotypic diversity SO CELL LA English DT Article ID HUMAN-IMMUNODEFICIENCY-VIRUS; COUPLED CHEMICAL-REACTIONS; DNA METHYLATION; SINGLE-CELL; TRANSCRIPTIONAL ACTIVITY; LATENT INFECTION; TYPE-1; GENOME; INTEGRATION; VECTOR AB HIV-1 Tat transactivation is vital for completion of the viral life cycle and has been implicated in determining proviral latency. We present an extensive experimental/computational study of an HIV-1 model vector (LTR-GFP-IRES-Tat) and show that stochastic fluctuations in Tat influence the viral latency decision. Low GFP/Tat expression was found to generate bifurcating phenotypes with clonal populations derived from single proviral integrations simultaneously exhibiting very high and near zero GFP expression. Although phenotypic bifurcation (PheB) was correlated with distinct genomic integration patterns, neither these patterns nor other extrinsic cellular factors (cell cycle/size, aneuploidy, chromatin silencing, etc.) explained PheB. Stochastic computational modeling successfully accounted for PheB and correctly predicted the dynamics of a Tat mutant that were subsequently confirmed by experiment. Thus, Tat stochastics appear sufficient to generate PheB (and potentially proviral latency), illustrating the importance of stochastic fluctuations in gene expression in a mammalian system. C1 Univ Calif Berkeley, Biophys Grad Grp, Berkeley, CA 94720 USA. Univ Calif Berkeley, Howard Hughes Med Inst, Dept Bioengn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Helen Wills Neurosci Inst, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA. RP Weinberger, LS (reprint author), Princeton Univ, Dept Mol Biol, Princeton, NJ 08544 USA. EM leor@princeton.edu; aparkin@lbl.gov RI Arkin, Adam/A-6751-2008; OI Arkin, Adam/0000-0002-4999-2931; Burnett, John/0000-0002-8817-6064 FU NIGMS NIH HHS [R01 GM73058] NR 53 TC 297 Z9 301 U1 0 U2 14 PU CELL PRESS PI CAMBRIDGE PA 1100 MASSACHUSETTS AVE, CAMBRIDGE, MA 02138 USA SN 0092-8674 J9 CELL JI Cell PD JUL 29 PY 2005 VL 122 IS 2 BP 169 EP 182 DI 10.1016/j.cell.2005.06.006 PG 14 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 951CR UT WOS:000230907000006 PM 16051143 ER PT J AU Pruess, K AF Pruess, K TI Numerical studies of fluid leakage from a geologic disposal reservoir for CO2 show self-limiting feedback between fluid flow and heat transfer SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID CARBON-DIOXIDE; AQUIFER DISPOSAL; SIMULATION; ERUPTIONS; NYOS; SEQUESTRATION; INDONESIA; ORIGIN; MEDIA; DIENG AB Leakage of CO2 from a hypothetical geologic storage reservoir along an idealized fault zone has been simulated, including transitions between supercritical, liquid, and gaseous CO2. We find strong non-isothermal effects due to boiling and Joule-Thomson cooling of expanding CO2. Leakage fluxes are limited by limitations in conductive heat transfer to the fault zone. The interplay between multiphase flow and heat transfer effects produces non-monotonic leakage behavior. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. RP Pruess, K (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. EM k_pruess@lbl.gov NR 24 TC 38 Z9 40 U1 0 U2 10 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD JUL 29 PY 2005 VL 32 IS 14 AR L14404 DI 10.1029/2005GL023250 PG 4 WC Geosciences, Multidisciplinary SC Geology GA 951MO UT WOS:000230934800007 ER PT J AU Gary, SP Smith, CW Skoug, RM AF Gary, SP Smith, CW Skoug, RM TI Signatures of Alfven-cyclotron wave-ion scattering: Advanced Composition Explorer (ACE) solar wind observations SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID PITCH-ANGLE DIFFUSION; ULYSSES OBSERVATIONS; CORONAL HOLES; ALFVEN/CYCLOTRON FLUCTUATIONS; VELOCITY DISTRIBUTIONS; TEMPERATURE ANISOTROPY; PARTICLE INTERACTIONS; HYBRID SIMULATIONS; COULOMB COLLISIONS; KINETIC-MODEL AB [1] Theory and simulations predict that Alfven-cyclotron fluctuations of sufficiently short wavelengths and at propagation approximately parallel or antiparallel to the background magnetic field B-o in collisionless plasmas scatter ions so as to increase their energies in the directions perpendicular to B-o. Linear Vlasov theory for a homogeneous, isotropic plasma of electrons, protons, and alpha particles predicts that alpha particle cyclotron resonance properties and ion cyclotron damping of such fluctuations are sensitive functions of the alpha/proton relative velocity. If a strong ion resonance corresponds to strong ion pitch-angle scattering, linear theory implies observable signatures in the anisotropies of solar wind alphas and protons. Statistical analyses of proton and alpha particle anisotropies measured in the solar wind near 1 AU by the plasma and magnetic field instruments on the Advanced Composition Explorer ( ACE) spacecraft are reported which are largely consistent with such signatures. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA. RP Los Alamos Natl Lab, MS D466, Los Alamos, NM 87545 USA. EM pgary@lanl.gov; charles.smith@unh.edu; rskoug@lanl.gov NR 56 TC 11 Z9 11 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9380 EI 2169-9402 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD JUL 29 PY 2005 VL 110 IS A7 AR A07108 DI 10.1029/2004JA010569 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 951QG UT WOS:000230944900001 ER PT J AU Liu, JY Huang, CD Shin, DH Yokota, H Jancarik, J Kim, JS Adams, PD Kim, R Kim, SH AF Liu, JY Huang, CD Shin, DH Yokota, H Jancarik, J Kim, JS Adams, PD Kim, R Kim, SH TI Crystal structure of a heat-inducible transcriptional repressor HrcA from Thermotoga maritima: Structural insight into DNA binding and dimerization SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE structural genomics; crystal structure; HrcA; CIRCE; GroES/GroEL ID BACILLUS-SUBTILIS; CAULOBACTER-CRESCENTUS; STAPHYLOCOCCUS-AUREUS; NEGATIVE REGULATION; SHOCK RESPONSE; PROTEIN; OPERON; CIRCE; MOTIF; GENE AB All cells have a defense mechanism against a sudden heat-shock stress. Commonly, they express a set of proteins that protect cellular proteins from being denatured by heat. Among them, GroE and DnaK chaperones are representative defending systems, and their transcription is regulated by a heat-shock repressor protein HrcA. HrcA repressor controls the transcription of groE and dnaK operons by binding the palindromic CIRCE element, presumably as a dimer, and the activity of HrcA repressor is modulated by GroE chaperones. Here, we report the first crystal structure of a heat-inducible transcriptional repressor, HrcA, from Thermotoga maritima at 2.2 angstrom resolution. The Tm_HrcA protein crystallizes as a dimer. The monomer is composed of three domains: an N-terminal winged helix-turn-helix domain (WH), a GAF-like domain, and an inserted dimerizing domain (IDD). The IDD shows a unique structural fold with an anti-parallel beta-sheet composed of three beta-strands sided by four a-helices. The Tm_HrcA dimer structure is formed through hydrophobic contact between the IDDs and a limited contact that involves conserved residues between the GAF-like domains. In the overall dimer structure, the two WH domains are exposed, but the conformation of these two domains seems to be incompatible with DNA binding. We suggest that our structure may represent an inactive form of the HrcA repressor. Structural implication on how the inactive form of HrcA may be converted to the active form by GroEL binding to a conserved C-terminal sequence region of HrcA is discussed. (c) 2005 Elsevier Ltd. All rights reserved. C1 Lawrence Berkeley Lab, Phys Biosci Div, Berkeley Struct Genom Ctr, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. RP Kim, SH (reprint author), Lawrence Berkeley Lab, Phys Biosci Div, Berkeley Struct Genom Ctr, Berkeley, CA 94720 USA. EM shkim@cchem.berkeley.edu RI Adams, Paul/A-1977-2013 OI Adams, Paul/0000-0001-9333-8219 FU NIGMS NIH HHS [GM 62412] NR 40 TC 8 Z9 9 U1 0 U2 0 PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD JUL 29 PY 2005 VL 350 IS 5 BP 987 EP 996 DI 10.1016/j.jmb.2005.04.021 PG 10 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 948FL UT WOS:000230701300014 PM 15979091 ER PT J AU Abazov, VM Abbott, B Abolins, M Acharya, BS Adams, M Adams, T Agelou, M Agram, JL Ahn, SH Ahsan, M Alexeev, GD Alkhazov, G Alton, A Alverson, G Alves, GA Anastasoaie, M Andeen, T Anderson, S Andrieu, B Arnoud, Y Askew, A Asman, B Jesus, ACSS Atramentov, O Autermann, C Avila, C Badaud, F Baden, A Baldin, B Balm, PW Banerjee, S Barberis, E Bargassa, P Baringer, P Barnes, C Barreto, J Bartlett, JF Bassler, U Bauer, D Bean, A Beauceron, S Begel, M Bellavance, A Beri, SB Bernardi, G Bernhard, R Bertram, I Besancon, M Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Binder, M Biscarat, C Black, KM Blackler, I Blazey, G Blekman, F Blessing, S Bloch, D Blumenschein, U Boehnlein, A Boeriu, O Bolton, TA Borcherding, F Borissov, G Bos, K Bose, T Brandt, A Brock, R Brooijmans, G Bross, A Buchanan, NJ Buchholz, D Buehler, M Buescher, V Burdin, S Burnett, TH Busato, E Butler, JM Bystricky, J Caron, S Carvalho, W Casey, BCK Cason, NM Castilla-Valdez, H Chakrabarti, S Chakraborty, D Chan, KM Chandra, A Chapin, D Charles, F Cheu, E Cho, DK Choi, S Choudhary, B Christiansen, T Christofek, L Claes, D Clement, B Clement, C Coadou, Y Cooke, M Cooper, WE Coppage, D Corcoran, M Cothenet, A Cousinou, MC Cox, B Crepe-Renaudin, S Cristetiu, M Cutts, D da Motta, H Davies, B Davies, G Davis, GA De, K de Jong, P de Jong, SJ De La Cruz-Burelo, E De Oliveira Martins, C Dean, S Degenhardt, JD Deliot, F Demarteau, M Demina, R Demine, P Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Doidge, M Dong, H Doulas, S Dudko, LV Duflot, L Dugad, SR Duperrin, A Dyer, J Dyshkant, A Eads, M Edmunds, D Edwards, T Ellison, J Elmsheuser, J Elvira, VD Eno, S Ermolov, P Eroshin, OV Estrada, J Evans, D Evans, H Evdokimov, A Evdokimov, VN Fast, J Fatakia, SN Feligioni, L Ferbel, T Fiedler, F Filthaut, F Fisher, W Fisk, HE Fleck, I Fortner, M Fox, H Fu, S Fuess, S Gadfort, T Galea, CF Gallas, E Galyaev, E Garcia, C Garcia-Bellido, A Gardner, J Gavrilov, V Gay, P Gele, D Gelhaus, R Genser, K Gerber, CE Gershtein, Y Ginther, G Golling, T Gomez, B Gounder, K Goussiou, A Grannis, PD Greder, S Greenlee, H Greenwood, ZD Gregores, EM Gris, P Grivaz, JF Groer, L Grunendahl, S Grunewald, MW Gurzhiev, SN Gutierrez, G Gutierrez, P Haas, A Hadley, NJ Hagopian, S Hall, I Hall, RE Han, C Han, L Hanagaki, K Harder, K Harrington, R Hauptman, JM Hauser, R Hays, J Hebbeker, T Hedin, D Heinmiller, JM Heinson, AP Heintz, U Hensel, C Hesketh, G Hildreth, MD Hirosky, R Hobbs, JD Hoeneisen, B Hohlfeld, M Hong, SJ Hooper, R Houben, P Hu, Y Huang, J Iashvili, I Illingworth, R Ito, AS Jabeen, S Jaffre, M Jain, S Jain, V Jakobs, K Jenkins, A Jesik, R Johns, K Johnson, M Jonckheere, A Jonsson, P Juste, A Kafer, D Kahl, W Kahn, S Kajfasz, E Kalinin, AM Kalk, J Karmanov, D Kasper, J Kau, D Kaur, R Kehoe, R Kermiche, S Kesisoglou, S Khanov, A Kharchilava, A Kharzheev, YM Kim, H Klima, B Klute, M Kohli, JM Kopal, M Korablev, VM Kotcher, J Kothari, B Koubarovsky, A Kozelov, AV Kozminski, J Kryemadhi, A Krzywdzinski, S Kuleshov, S Kulik, Y Kumar, A Kunori, S Kupco, A Kurca, T Kvita, J Lager, S Lahrichi, N Landsberg, G Lazoflores, J Le Bihan, AC Lebrun, P Lee, WM Leflat, A Lehner, F Leonidopoulos, C Leveque, J Lewis, P Li, J Li, QZ Lima, JGR Lincoln, D Linn, SL Linnemann, J Lipaev, VV Lipton, R Lobo, L Lobodenko, A Lokajicek, M Lounis, A Love, P Lubatti, HJ Lueking, L Lynker, M Lyon, AL Maciel, AKA Madaras, RJ Mattig, P Magass, C Magerkurth, A Magnan, AM Makovec, N Mal, PK Malbouisson, HB Malik, S Malyshev, VL Mao, HS Maravin, Y Martens, M Mattingly, SEK Mayorov, AA McCarthy, R McCroskey, R Meder, D Melanson, HL Melnitchouk, A Mendes, A Merkin, M Merritt, KW Meyer, A Michaut, M Miettinen, H Mitrevski, J Mokhov, N Molina, J Mondal, NK Moore, RW Muanza, GS Mulders, M Mutaf, YD Nagy, E Narain, M Naumann, NA Neal, HA Negret, JP Nelson, S Neustroev, P Noeding, C Nomerotski, A Novaes, SF Nunnemann, T Nurse, E O'Dell, V O'Neil, DC Oguri, V Oliveira, N Oshima, N Garzon, GJO Padley, P Parashar, N Park, SK Parsons, J Partridge, R Parua, N Patwa, A Perea, PM Perez, E Petroff, P Petteni, M Phaf, L Piegaia, R Pleier, MA Podesta-Lerma, PLM Podstavkov, VM Pogorelov, Y Pope, BG Prado da Silva, WL Prosper, HB Protopopescu, S Qian, J Quadt, A Quinn, B Rani, KJ Ranjan, K Rapidis, PA Ratoff, PN Reay, NW Reucroft, S Rijssenbeek, M Ripp-Baudot, I Rizatdinova, F Rodrigues, RF Royon, C Rubinov, P Ruchti, R Rud, VI Sajot, G Sanchez-Hernandez, A Sanders, MP Santoro, A Savage, G Sawyer, L Scanlon, T Schaile, D Schamberger, RD Schellman, H Schieferdecker, P Schmitt, C Schwartzman, A Schwienhorst, R Sengupta, S Severini, H Shabalina, E Shamim, M Shary, V Shchukin, AA Shephard, WD Shivpuri, RK Shpakov, D Sidwell, RA Simak, V Sirotenko, V Skubic, P Slattery, P Smith, RP Smolek, K Snow, GR Snow, J Snyder, S Soldner-Rembold, S Song, X Sonnenschein, L Sopczak, A Sosebee, M Soustruznik, K Souza, M Spurlock, B Stanton, NR Stark, J Steele, J Stevenson, K Stolin, V Stone, A Stoyanova, DA Strandberg, J Strang, MA Strauss, M Strohmer, R Strom, D Strovink, M Stutte, L Sumowidagdo, S Sznajder, A Talby, M Tamburello, P Taylor, W Telford, P Temple, J Thomas, E Thooris, B Tomoto, M Toole, T Torborg, J Towers, S Trefzger, T Trincaz-Duvoid, S Tuchming, B Tully, C Turcot, AS Tuts, PM Uvarov, L Uvarov, S Uzunyan, S Vachon, B Van Kooten, R van Leeuwen, WM Varelas, N Varnes, EW Vartapetian, A Vasilyev, IA Vaupel, M Verdier, P Vertogradov, LS Verzocchi, M Villeneuve-Seguier, F Vlimant, JR Von Toerne, E Vreeswijk, M Vu Anh, T Wahl, HD Walker, R Wang, L Wang, ZM Warchol, J Watts, G Wayne, M Weber, M Weerts, H Wegner, M Wermes, N White, A White, V Wicke, D Wijngaarden, DA Wilson, GW Wimpenny, SJ Wittlin, J Wobisch, M Womersley, J Wood, DR Wyatt, TR Xu, Q Xuan, N Yacoob, S Yamada, R Yan, M Yasuda, T Yatsunenko, YA Yen, Y Yip, K Yoo, HD Youn, SW Yu, J Yurkewicz, A Zabi, A Zatserklyaniy, A Zdrazil, M Zeitnitz, C Zhang, D Zhang, X Zhao, T Zhao, Z Zhou, B Zhu, J Zielinski, M Zieminska, D Zieminski, A Zitoun, R Zutshi, V Zverev, EG AF Abazov, VM Abbott, B Abolins, M Acharya, BS Adams, M Adams, T Agelou, M Agram, JL Ahn, SH Ahsan, M Alexeev, GD Alkhazov, G Alton, A Alverson, G Alves, GA Anastasoaie, M Andeen, T Anderson, S Andrieu, B Arnoud, Y Askew, A Asman, B Jesus, ACSS Atramentov, O Autermann, C Avila, C Badaud, F Baden, A Baldin, B Balm, PW Banerjee, S Barberis, E Bargassa, P Baringer, P Barnes, C Barreto, J Bartlett, JF Bassler, U Bauer, D Bean, A Beauceron, S Begel, M Bellavance, A Beri, SB Bernardi, G Bernhard, R Bertram, I Besancon, M Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Binder, M Biscarat, C Black, KM Blackler, I Blazey, G Blekman, F Blessing, S Bloch, D Blumenschein, U Boehnlein, A Boeriu, O Bolton, TA Borcherding, F Borissov, G Bos, K Bose, T Brandt, A Brock, R Brooijmans, G Bross, A Buchanan, NJ Buchholz, D Buehler, M Buescher, V Burdin, S Burnett, TH Busato, E Butler, JM Bystricky, J Caron, S Carvalho, W Casey, BCK Cason, NM Castilla-Valdez, H Chakrabarti, S Chakraborty, D Chan, KM Chandra, A Chapin, D Charles, F Cheu, E Cho, DK Choi, S Choudhary, B Christiansen, T Christofek, L Claes, D Clement, B Clement, C Coadou, Y Cooke, M Cooper, WE Coppage, D Corcoran, M Cothenet, A Cousinou, MC Cox, B Crepe-Renaudin, S Cristetiu, M Cutts, D da Motta, H Davies, B Davies, G Davis, GA De, K de Jong, P de Jong, SJ De La Cruz-Burelo, E De Oliveira Martins, C Dean, S Degenhardt, JD Deliot, F Demarteau, M Demina, R Demine, P Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Doidge, M Dong, H Doulas, S Dudko, LV Duflot, L Dugad, SR Duperrin, A Dyer, J Dyshkant, A Eads, M Edmunds, D Edwards, T Ellison, J Elmsheuser, J Elvira, VD Eno, S Ermolov, P Eroshin, OV Estrada, J Evans, D Evans, H Evdokimov, A Evdokimov, VN Fast, J Fatakia, SN Feligioni, L Ferbel, T Fiedler, F Filthaut, F Fisher, W Fisk, HE Fleck, I Fortner, M Fox, H Fu, S Fuess, S Gadfort, T Galea, CF Gallas, E Galyaev, E Garcia, C Garcia-Bellido, A Gardner, J Gavrilov, V Gay, P Gele, D Gelhaus, R Genser, K Gerber, CE Gershtein, Y Ginther, G Golling, T Gomez, B Gounder, K Goussiou, A Grannis, PD Greder, S Greenlee, H Greenwood, ZD Gregores, EM Gris, P Grivaz, JF Groer, L Grunendahl, S Grunewald, MW Gurzhiev, SN Gutierrez, G Gutierrez, P Haas, A Hadley, NJ Hagopian, S Hall, I Hall, RE Han, C Han, L Hanagaki, K Harder, K Harrington, R Hauptman, JM Hauser, R Hays, J Hebbeker, T Hedin, D Heinmiller, JM Heinson, AP Heintz, U Hensel, C Hesketh, G Hildreth, MD Hirosky, R Hobbs, JD Hoeneisen, B Hohlfeld, M Hong, SJ Hooper, R Houben, P Hu, Y Huang, J Iashvili, I Illingworth, R Ito, AS Jabeen, S Jaffre, M Jain, S Jain, V Jakobs, K Jenkins, A Jesik, R Johns, K Johnson, M Jonckheere, A Jonsson, P Juste, A Kafer, D Kahl, W Kahn, S Kajfasz, E Kalinin, AM Kalk, J Karmanov, D Kasper, J Kau, D Kaur, R Kehoe, R Kermiche, S Kesisoglou, S Khanov, A Kharchilava, A Kharzheev, YM Kim, H Klima, B Klute, M Kohli, JM Kopal, M Korablev, VM Kotcher, J Kothari, B Koubarovsky, A Kozelov, AV Kozminski, J Kryemadhi, A Krzywdzinski, S Kuleshov, S Kulik, Y Kumar, A Kunori, S Kupco, A Kurca, T Kvita, J Lager, S Lahrichi, N Landsberg, G Lazoflores, J Le Bihan, AC Lebrun, P Lee, WM Leflat, A Lehner, F Leonidopoulos, C Leveque, J Lewis, P Li, J Li, QZ Lima, JGR Lincoln, D Linn, SL Linnemann, J Lipaev, VV Lipton, R Lobo, L Lobodenko, A Lokajicek, M Lounis, A Love, P Lubatti, HJ Lueking, L Lynker, M Lyon, AL Maciel, AKA Madaras, RJ Mattig, P Magass, C Magerkurth, A Magnan, AM Makovec, N Mal, PK Malbouisson, HB Malik, S Malyshev, VL Mao, HS Maravin, Y Martens, M Mattingly, SEK Mayorov, AA McCarthy, R McCroskey, R Meder, D Melanson, HL Melnitchouk, A Mendes, A Merkin, M Merritt, KW Meyer, A Michaut, M Miettinen, H Mitrevski, J Mokhov, N Molina, J Mondal, NK Moore, RW Muanza, GS Mulders, M Mutaf, YD Nagy, E Narain, M Naumann, NA Neal, HA Negret, JP Nelson, S Neustroev, P Noeding, C Nomerotski, A Novaes, SF Nunnemann, T Nurse, E O'Dell, V O'Neil, DC Oguri, V Oliveira, N Oshima, N Garzon, GJO Padley, P Parashar, N Park, SK Parsons, J Partridge, R Parua, N Patwa, A Perea, PM Perez, E Petroff, P Petteni, M Phaf, L Piegaia, R Pleier, MA Podesta-Lerma, PLM Podstavkov, VM Pogorelov, Y Pope, BG Prado da Silva, WL Prosper, HB Protopopescu, S Qian, J Quadt, A Quinn, B Rani, KJ Ranjan, K Rapidis, PA Ratoff, PN Reay, NW Reucroft, S Rijssenbeek, M Ripp-Baudot, I Rizatdinova, F Rodrigues, RF Royon, C Rubinov, P Ruchti, R Rud, VI Sajot, G Sanchez-Hernandez, A Sanders, MP Santoro, A Savage, G Sawyer, L Scanlon, T Schaile, D Schamberger, RD Schellman, H Schieferdecker, P Schmitt, C Schwartzman, A Schwienhorst, R Sengupta, S Severini, H Shabalina, E Shamim, M Shary, V Shchukin, AA Shephard, WD Shivpuri, RK Shpakov, D Sidwell, RA Simak, V Sirotenko, V Skubic, P Slattery, P Smith, RP Smolek, K Snow, GR Snow, J Snyder, S Soldner-Rembold, S Song, X Sonnenschein, L Sopczak, A Sosebee, M Soustruznik, K Souza, M Spurlock, B Stanton, NR Stark, J Steele, J Stevenson, K Stolin, V Stone, A Stoyanova, DA Strandberg, J Strang, MA Strauss, M Strohmer, R Strom, D Strovink, M Stutte, L Sumowidagdo, S Sznajder, A Talby, M Tamburello, P Taylor, W Telford, P Temple, J Thomas, E Thooris, B Tomoto, M Toole, T Torborg, J Towers, S Trefzger, T Trincaz-Duvoid, S Tuchming, B Tully, C Turcot, AS Tuts, PM Uvarov, L Uvarov, S Uzunyan, S Vachon, B Van Kooten, R van Leeuwen, WM Varelas, N Varnes, EW Vartapetian, A Vasilyev, IA Vaupel, M Verdier, P Vertogradov, LS Verzocchi, M Villeneuve-Seguier, F Vlimant, JR Von Toerne, E Vreeswijk, M Vu Anh, T Wahl, HD Walker, R Wang, L Wang, ZM Warchol, J Watts, G Wayne, M Weber, M Weerts, H Wegner, M Wermes, N White, A White, V Wicke, D Wijngaarden, DA Wilson, GW Wimpenny, SJ Wittlin, J Wobisch, M Womersley, J Wood, DR Wyatt, TR Xu, Q Xuan, N Yacoob, S Yamada, R Yan, M Yasuda, T Yatsunenko, YA Yen, Y Yip, K Yoo, HD Youn, SW Yu, J Yurkewicz, A Zabi, A Zatserklyaniy, A Zdrazil, M Zeitnitz, C Zhang, D Zhang, X Zhao, T Zhao, Z Zhou, B Zhu, J Zielinski, M Zieminska, D Zieminski, A Zitoun, R Zutshi, V Zverev, EG TI Study Z gamma events and limits on anomalous ZZ gamma and Z gamma gamma couplings in pp(-) collisions at root s=1.96 Tev SO PHYSICAL REVIEW LETTERS LA English DT Article ID GAUGE-BOSON COUPLINGS; P(P)OVER-BAR COLLISIONS; LEP; E(+)E(-); SEARCH AB We present a measurement of the Z gamma production cross section and limits on anomalous ZZ gamma and Z gamma gamma couplings for form-factor scales of Lambda=750 and 1000 GeV. The measurement is based on 138 (152) candidates in the ee gamma (mu mu gamma) final state using 320(290) pb(-1) of p (p) over bar collisions at root s=1.96 TeV. The 95% C.L. limits on real and imaginary parts of individual anomalous couplings are vertical bar h(10,30)(Z)vertical bar < 0.23, vertical bar h(20,40)(Z)vertical bar < 0.020, vertical bar h(10,30)(gamma)vertical bar < 0.23, and vertical bar h(20,40)(gamma)vertical bar < 0.019 for Lambda=1000 GeV. C1 Joint Inst Nucl Res, Dubna, Russia. Univ Buenos Aires, RA-1053 Buenos Aires, DF, Argentina. Ctr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, Brazil. Univ Estado Rio De Janeiro, Rio De Janeiro, Brazil. Univ Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, Brazil. Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada. Univ Alberta, Edmonton, AB T6G 2M7, Canada. York Univ, Toronto, ON M3J 2R7, Canada. McGill Univ, Montreal, PQ H3A 2T5, Canada. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Sci & Technol China, Hefei 230026, Peoples R China. Univ Los Andes, Bogota, Colombia. Charles Univ Prague, Ctr Particle Phys, Prague, Czech Republic. Czech Tech Univ, CR-16635 Prague, Czech Republic. Acad Sci Czech Republic, Inst Phys, Ctr Particle Phys, Prague, Czech Republic. Univ San Francisco Quito, Quito, Ecuador. Univ Clermont Ferrand, CNRS, IN2P3, Phys Corpusculaire Lab, Clermont Ferrand, France. Univ Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, France. Univ Aix Marseille 2, CNRS, IN2P3, CPPM, Marseille, France. CNRS, IN2P3, Accelerateur Lineaire Lab, F-91405 Orsay, France. Univ Paris 06, CNRS, IN2P3, LPNHE, Paris, France. Univ Paris 07, CNRS, IN2P3, LPNHE, Paris, France. CEA, DAPNIA, Serv Phys Particules, Saclay, France. Univ Louis Pasteur Strasbourg 1, CNRS, IN2P3, IReS, Strasbourg, France. Univ Haute Alsace, Mulhouse, France. Univ Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, France. Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany. Univ Bonn, Inst Phys, D-5300 Bonn, Germany. Univ Freiburg, Inst Phys, D-7800 Freiburg, Germany. Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany. Univ Munich, Munich, Germany. Univ Wuppertal, Fachbereich Phys, Wuppertal, Germany. Panjab Univ, Chandigarh 160014, India. Univ Delhi, Delhi 110007, India. Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India. Univ Coll Dublin, Dublin 2, Ireland. Korea Univ, Korea Detector Lab, Seoul 136701, South Korea. CINVESTAV, Mexico City 14000, DF, Mexico. NIKHEF H, FOM Inst, NL-1009 DB Amsterdam, Netherlands. Univ Amsterdam, NIKHEF H, Amsterdam, Netherlands. Radboud Univ Nijmegen, NIKHEF H, Nijmegen, Netherlands. Inst Theoret & Expt Phys, Moscow 117259, Russia. Moscow MV Lomonosov State Univ, Moscow, Russia. Inst High Energy Phys, Protvino, Russia. Petersburg Nucl Phys Inst, St Petersburg, Russia. Lund Univ, Lund, Sweden. Royal Inst Technol, Stockholm, Sweden. Stockholm Univ, S-10691 Stockholm, Sweden. Uppsala Univ, S-75105 Uppsala, Sweden. Univ Lancaster, Lancaster LA1 4YW, England. Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England. Univ Manchester, Manchester M13 9PL, Lancs, England. Univ Arizona, Tucson, AZ 85721 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Calif State Univ Fresno, Fresno, CA 93740 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Florida State Univ, Tallahassee, FL 32306 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Illinois, Chicago, IL 60607 USA. No Illinois Univ, De Kalb, IL 60115 USA. Northwestern Univ, Evanston, IL 60208 USA. Indiana Univ, Bloomington, IN 47405 USA. Univ Notre Dame, Notre Dame, IN 46556 USA. Iowa State Univ Sci & Technol, Ames, IA 50011 USA. Univ Kansas, Lawrence, KS 66045 USA. Kansas State Univ, Manhattan, KS 66506 USA. Louisiana Tech Univ, Ruston, LA 71272 USA. Univ Maryland, College Pk, MD 20742 USA. Boston Univ, Boston, MA 02215 USA. Northeastern Univ, Boston, MA 02115 USA. Univ Michigan, Ann Arbor, MI 48109 USA. Michigan State Univ, E Lansing, MI 48824 USA. Univ Mississippi, University, MS 38677 USA. Univ Nebraska, Lincoln, NE 68588 USA. Princeton Univ, Princeton, NJ 08544 USA. Columbia Univ, New York, NY 10027 USA. Univ Rochester, Rochester, NY 14627 USA. SUNY Stony Brook, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. Langston Univ, Langston, OK 73050 USA. Univ Oklahoma, Norman, OK 73019 USA. Brown Univ, Providence, RI 02912 USA. Univ Texas, Arlington, TX 76019 USA. So Methodist Univ, Dallas, TX 75275 USA. Rice Univ, Houston, TX 77005 USA. Univ Virginia, Charlottesville, VA 22901 USA. Univ Washington, Seattle, WA 98195 USA. RP Joint Inst Nucl Res, Dubna, Russia. RI Oguri, Vitor/B-5403-2013; Alves, Gilvan/C-4007-2013; Deliot, Frederic/F-3321-2014; Sharyy, Viatcheslav/F-9057-2014; Sznajder, Andre/L-1621-2016; Telford, Paul/B-6253-2011; De, Kaushik/N-1953-2013; Fisher, Wade/N-4491-2013; Nomerotski, Andrei/A-5169-2010; Shivpuri, R K/A-5848-2010; Gutierrez, Phillip/C-1161-2011; Leflat, Alexander/D-7284-2012; Dudko, Lev/D-7127-2012; Merkin, Mikhail/D-6809-2012; Novaes, Sergio/D-3532-2012; Yip, Kin/D-6860-2013; Kuleshov, Sergey/D-9940-2013 OI Sharyy, Viatcheslav/0000-0002-7161-2616; Sznajder, Andre/0000-0001-6998-1108; De, Kaushik/0000-0002-5647-4489; Dudko, Lev/0000-0002-4462-3192; Novaes, Sergio/0000-0003-0471-8549; Yip, Kin/0000-0002-8576-4311; Kuleshov, Sergey/0000-0002-3065-326X NR 22 TC 15 Z9 15 U1 0 U2 3 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 JUL 29 PY 2005 VL 95 IS 5 AR 051802 DI 10.1103/PhysRevLett.95.051802 PG 7 WC Physics, Multidisciplinary SC Physics GA 950VW UT WOS:000230887500013 ER PT J AU Acosta, D Affolder, T Albrow, MG Ambrose, D Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Badgett, W Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Behari, S Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Beretvas, A Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Bocci, A Bodek, A Bolla, G Bolshov, A Bortoletto, D Boudreau, J Bromberg, C Brubaker, E Budagov, J Budd, HS Burkett, K Busetto, G Byrum, KL Cabrera, S Campbell, M Carithers, W Carlsmith, D Castro, A Cauz, D Cerri, A Cerrito, L Chapman, J Chen, C Chen, YC Chertok, M Chiarelli, G Chlachidze, G Chlebana, F Chu, ML Chung, JY Chung, WH Chung, YS Ciobanu, CI Clark, AG Coca, M Connolly, A Convery, M Conway, J Cordelli, M Cranshaw, J Culbertson, R Dagenhart, D D'Auria, S de Barbaro, P De Cecco, S Dell'Agnello, S Dell'Orso, M Demers, S Demortier, L Deninno, M De Pedis, D Derwent, PF Dionisi, C Dittmann, JR Dominguez, A Donati, S D'Onofrio, M Dorigo, T Eddy, N Erbacher, R Errede, D Errede, S Eusebi, R Farrington, S Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Flores-Castillo, LR Foster, GW Franklin, M Friedman, J Frisch, H Furic, I Gallinaro, M Garcia-Sciveres, M Garfinkel, AF Gay, C Gerdes, DW Gerstein, E Giagu, S Giannetti, P Giolo, K Giordani, M Giromini, P Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, J Gomez, G Goncharov, M Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Gresele, A Grosso-Pilcher, C Guenther, M Guimaraes da Costa, J Haber, C Hahn, SR Halkiadakis, E Handler, R Happacher, F Hara, K Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Hennecke, M Herndon, M Hill, C Hocker, A Hoffman, KD Hou, S Huffman, BT Hughes, R Huston, J Issever, C Incandela, J Introzzi, G Iori, M Ivanov, A Iwata, Y Iyutin, B James, E Jones, M Kamon, T Kang, J Karagoz Unel, M Kartal, S Kasha, H Kato, Y Kennedy, RD Kephart, R Kilminster, B Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, TH Kim, YK Kirby, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kroll, J Kruse, M Krutelyov, V Kuhlmann, SE Kuznetsova, N Laasanen, AT Lami, S Lammel, S Lancaster, J Lannon, K Lancaster, M Lander, R Lath, A Latino, G LeCompte, T Le, Y Lee, J Lee, SW Leonardo, N Leone, S Lewis, JD Li, K Lin, CS Lindgren, M Liss, TM Liu, T Litvintsev, DO Lockyer, NS Loginov, A Loreti, M Lucchesi, D Lukens, P Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Manca, G Mariotti, M Martin, M Martin, A Martin, V Martinez, M Mazzanti, P McFarland, KS McIntyre, P Menguzzato, M Menzione, A Merkel, P Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Miscetti, S Mitselmakher, G Moggi, N Moore, R Moulik, T Mulhearn, M Mukherjee, A Muller, T Munar, A Murat, P Nachtman, J Nahn, S Nakano, I Napora, R Niell, F Nelson, C Nelson, T Neu, C Neubauer, MS Newman-Holmes, C Nigmanov, T Nodulman, L Oh, SH Oh, YD Ohsugi, T Okusawa, T Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Patrick, J Pauletta, G Paulini, M Pauly, T Paus, C Pellett, D Penzo, A Phillips, TJ Piacentino, G Piedra, J Pitts, KT Pompos, A Pondrom, L Pope, G Pratt, T Prokoshin, F Proudfoot, J Ptohos, F Poukhov, O Punzi, G Rademacker, J Rakitine, A Ratnikov, F Ray, H Reichold, A Renton, P Rescigno, M Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Ryan, D Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sarkar, S Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scribano, A Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Sill, A Sinervo, P Slaughter, AJ Sliwa, K Snider, FD Snihur, R Spezziga, M Spinella, F Spiropulu, M Spiegel, L Stefanini, A Strologas, J Stuart, D Sukhanov, A Sumorok, K Suzuki, T Takashima, R Takikawa, K Tanaka, M Tecchio, M Tesarek, RJ Teng, PK Terashi, K Tether, S Thom, J Thompson, AS Thomson, E Tipton, P Tkaczyk, S Toback, D Tollefson, K Tonelli, D Tonnesmann, M Toyoda, H Trischuk, W Tseng, J Tsybychev, D Turini, N Ukegawa, F Unverhau, T Vaiciulis, T Varganov, A Vataga, E Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Wagner, RG Wagner, RL Wagner, W Wan, Z Wang, C Wang, MJ Wang, SM Ward, B Waschke, S Waters, D Watts, T Weber, M Wester, WC Whitehouse, B Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Wolbers, S Wolter, M Worm, S Wu, X Wurthwein, F Yang, UK Yao, W Yeh, GP Yi, K Yoh, J Yoshida, T Yu, I Yu, S Yun, JC Zanello, L Zanetti, A Zetti, F Zucchelli, S AF Acosta, D Affolder, T Albrow, MG Ambrose, D Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Badgett, W Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Behari, S Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Beretvas, A Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Bocci, A Bodek, A Bolla, G Bolshov, A Bortoletto, D Boudreau, J Bromberg, C Brubaker, E Budagov, J Budd, HS Burkett, K Busetto, G Byrum, KL Cabrera, S Campbell, M Carithers, W Carlsmith, D Castro, A Cauz, D Cerri, A Cerrito, L Chapman, J Chen, C Chen, YC Chertok, M Chiarelli, G Chlachidze, G Chlebana, F Chu, ML Chung, JY Chung, WH Chung, YS Ciobanu, CI Clark, AG Coca, M Connolly, A Convery, M Conway, J Cordelli, M Cranshaw, J Culbertson, R Dagenhart, D D'Auria, S de Barbaro, P De Cecco, S Dell'Agnello, S Dell'Orso, M Demers, S Demortier, L Deninno, M De Pedis, D Derwent, PF Dionisi, C Dittmann, JR Dominguez, A Donati, S D'Onofrio, M Dorigo, T Eddy, N Erbacher, R Errede, D Errede, S Eusebi, R Farrington, S Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Flores-Castillo, LR Foster, GW Franklin, M Friedman, J Frisch, H Furic, I Gallinaro, M Garcia-Sciveres, M Garfinkel, AF Gay, C Gerdes, DW Gerstein, E Giagu, S Giannetti, P Giolo, K Giordani, M Giromini, P Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, J Gomez, G Goncharov, M Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Gresele, A Grosso-Pilcher, C Guenther, M Guimaraes da Costa, J Haber, C Hahn, SR Halkiadakis, E Handler, R Happacher, F Hara, K Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Hennecke, M Herndon, M Hill, C Hocker, A Hoffman, KD Hou, S Huffman, BT Hughes, R Huston, J Issever, C Incandela, J Introzzi, G Iori, M Ivanov, A Iwata, Y Iyutin, B James, E Jones, M Kamon, T Kang, J Karagoz Unel, M Kartal, S Kasha, H Kato, Y Kennedy, RD Kephart, R Kilminster, B Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, TH Kim, YK Kirby, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kroll, J Kruse, M Krutelyov, V Kuhlmann, SE Kuznetsova, N Laasanen, AT Lami, S Lammel, S Lancaster, J Lannon, K Lancaster, M Lander, R Lath, A Latino, G LeCompte, T Le, Y Lee, J Lee, SW Leonardo, N Leone, S Lewis, JD Li, K Lin, CS Lindgren, M Liss, TM Liu, T Litvintsev, DO Lockyer, NS Loginov, A Loreti, M Lucchesi, D Lukens, P Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Manca, G Mariotti, M Martin, M Martin, A Martin, V Martinez, M Mazzanti, P McFarland, KS McIntyre, P Menguzzato, M Menzione, A Merkel, P Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Miscetti, S Mitselmakher, G Moggi, N Moore, R Moulik, T Mulhearn, M Mukherjee, A Muller, T Munar, A Murat, P Nachtman, J Nahn, S Nakano, I Napora, R Niell, F Nelson, C Nelson, T Neu, C Neubauer, MS Newman-Holmes, C Nigmanov, T Nodulman, L Oh, SH Oh, YD Ohsugi, T Okusawa, T Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Patrick, J Pauletta, G Paulini, M Pauly, T Paus, C Pellett, D Penzo, A Phillips, TJ Piacentino, G Piedra, J Pitts, KT Pompos, A Pondrom, L Pope, G Pratt, T Prokoshin, F Proudfoot, J Ptohos, F Poukhov, O Punzi, G Rademacker, J Rakitine, A Ratnikov, F Ray, H Reichold, A Renton, P Rescigno, M Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Ryan, D Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sarkar, S Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scribano, A Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Sill, A Sinervo, P Slaughter, AJ Sliwa, K Snider, FD Snihur, R Spezziga, M Spinella, F Spiropulu, M Spiegel, L Stefanini, A Strologas, J Stuart, D Sukhanov, A Sumorok, K Suzuki, T Takashima, R Takikawa, K Tanaka, M Tecchio, M Tesarek, RJ Teng, PK Terashi, K Tether, S Thom, J Thompson, AS Thomson, E Tipton, P Tkaczyk, S Toback, D Tollefson, K Tonelli, D Tonnesmann, M Toyoda, H Trischuk, W Tseng, J Tsybychev, D Turini, N Ukegawa, F Unverhau, T Vaiciulis, T Varganov, A Vataga, E Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Wagner, RG Wagner, RL Wagner, W Wan, Z Wang, C Wang, MJ Wang, SM Ward, B Waschke, S Waters, D Watts, T Weber, M Wester, WC Whitehouse, B Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Wolbers, S Wolter, M Worm, S Wu, X Wurthwein, F Yang, UK Yao, W Yeh, GP Yi, K Yoh, J Yoshida, T Yu, I Yu, S Yun, JC Zanello, L Zanetti, A Zetti, F Zucchelli, S CA CDF Collaboration TI Search for Higgs bosons decaying into bb(-) and produced in association with a Vector boson in pp- collisions at root s=1.8 TeV SO PHYSICAL REVIEW LETTERS LA English DT Article ID COLLIDER DETECTOR; FERMILAB TEVATRON; TOP-QUARK; MASS AB We present a new search for (HV)-V-0 production, where H-0 is a scalar Higgs boson decaying into b (b) over bar with branching ratio beta, and V is a Z(0) boson decaying into e(+)e(-), mu(+)mu(-), or v (v) over bar. This search is then combined with previous searches for (HV)-V-0 where V is a W+/- boson or a hadronically decaying Z(0). The data sample consists of 106 +/- 4 pb(-1) of p (p) over bar collisions at root s=1.8 TeV accumulated by the Collider Detector at Fermilab. Observing no evidence of a signal, we set 95% Bayesian credibility level upper limits on sigma(p (p) over bar -> (HV)-V-0)x beta. For H-0 masses of 90, 110, and 130 GeV/c(2), the limits are 7.8, 7.2, and 6.6 pb, respectively. C1 Univ Florida, Gainesville, FL 32611 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Penn, Philadelphia, PA 19104 USA. Univ Michigan, Ann Arbor, MI 48109 USA. MIT, Cambridge, MA 02139 USA. Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Waseda Univ, Tokyo 169, Japan. Joint Nucl Res Inst, RU-141980 Dubna, Russia. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Oxford, Oxford OX1 3RH, England. Univ Padua, Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Purdue Univ, W Lafayette, IN 47907 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Calif Davis, Davis, CA 95616 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Pisa, Ist Nazl Fis Nucl, I-56100 Pisa, Italy. Scuola Normale Super Pisa, I-56100 Pisa, Italy. Univ Trieste, Ist Nazl Fis Nucl, Udine, Italy. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Univ Wisconsin, Madison, WI 53706 USA. Duke Univ, Durham, NC 27708 USA. Rockefeller Univ, New York, NY 10021 USA. Brandeis Univ, Waltham, MA 02254 USA. Univ Rochester, Rochester, NY 14627 USA. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Michigan State Univ, E Lansing, MI 48824 USA. Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy. Univ Illinois, Urbana, IL 61801 USA. Ohio State Univ, Columbus, OH 43210 USA. Univ Geneva, CH-1211 Geneva, Switzerland. Rutgers State Univ, Piscataway, NJ 08855 USA. Texas Tech Univ, Lubbock, TX 79409 USA. Univ Rome La Sapienza 1, Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy. Yale Univ, New Haven, CT 06520 USA. Harvard Univ, Cambridge, MA 02138 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Univ New Mexico, Albuquerque, NM 87131 USA. Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain. Texas A&M Univ, College Stn, TX 77843 USA. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Hiroshima Univ, Higashihiroshima 724, Japan. Northwestern Univ, Evanston, IL 60208 USA. Osaka City Univ, Osaka 588, Japan. Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea. Sungkyunkwan Univ, Suwon 440746, South Korea. Seoul Natl Univ, Seoul 151742, South Korea. UCL, London WC1E 6BT, England. Inst Theoret & Expt Phys, Moscow 117259, Russia. Tufts Univ, Medford, MA 02155 USA. Univ Toronto, Inst Particle Phys, Toronto, ON M5S 1A7, Canada. RP Acosta, D (reprint author), Univ Florida, Gainesville, FL 32611 USA. RI De Cecco, Sandro/B-1016-2012; Wolter, Marcin/A-7412-2012; St.Denis, Richard/C-8997-2012; Azzi, Patrizia/H-5404-2012; manca, giulia/I-9264-2012; Punzi, Giovanni/J-4947-2012; Chiarelli, Giorgio/E-8953-2012; Ivanov, Andrew/A-7982-2013; Kim, Soo-Bong/B-7061-2014; Scodellaro, Luca/K-9091-2014; Lancaster, Mark/C-1693-2008; Ruiz, Alberto/E-4473-2011; Connolly, Amy/J-3958-2013; Paulini, Manfred/N-7794-2014; vilar, rocio/P-8480-2014; Cabrera Urban, Susana/H-1376-2015; Prokoshin, Fedor/E-2795-2012; Introzzi, Gianluca/K-2497-2015; Gorelov, Igor/J-9010-2015; Leonardo, Nuno/M-6940-2016 OI Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Chiarelli, Giorgio/0000-0001-9851-4816; Ivanov, Andrew/0000-0002-9270-5643; Scodellaro, Luca/0000-0002-4974-8330; Ruiz, Alberto/0000-0002-3639-0368; Paulini, Manfred/0000-0002-6714-5787; Prokoshin, Fedor/0000-0001-6389-5399; Introzzi, Gianluca/0000-0002-1314-2580; Gorelov, Igor/0000-0001-5570-0133; Leonardo, Nuno/0000-0002-9746-4594 NR 14 TC 13 Z9 13 U1 1 U2 4 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 29 PY 2005 VL 95 IS 5 AR 051801 DI 10.1103/PhysRevLett.95.051801 PG 6 WC Physics, Multidisciplinary SC Physics GA 950VW UT WOS:000230887500012 ER PT J AU Andonian, G Murokh, A Rosenzweig, JB Agustsson, R Babzien, M Ben-Zvi, I Frigola, P Huang, JY Palumbo, L Pellegrini, C Reiche, S Travish, G Vicario, C Yakimenko, V AF Andonian, G Murokh, A Rosenzweig, JB Agustsson, R Babzien, M Ben-Zvi, I Frigola, P Huang, JY Palumbo, L Pellegrini, C Reiche, S Travish, G Vicario, C Yakimenko, V TI Observation of anomalously large spectral bandwidth in a high-gain self-amplified spontaneous emission free-electron laser SO PHYSICAL REVIEW LETTERS LA English DT Article ID POWER AB Observation of ultrawide bandwidth, up to 15% full-width, high-gain operation of a self-amplified spontaneous emission free-election laser (SASE FEL) is reported. This type of lasing is obtained with a strongly chirped beam (delta E/E similar to 1.7%) emitted from the accelerator. Because of nonlinear pulse compression during transport, a short, high current bunch with strong mismatch errors is injected into the undulator, giving high FEL gain. Start-to-end simulations reproduce key features of the measurements and provide insight into mechanisms, such as angular spread in emitted photon and electron trajectory distributions, which yield novel features in the radiation spectrum. C1 Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. Brookhaven Natl Lab, Accelerator Test Facil, Upton, NY 11973 USA. Univ Roma La Sapienza, I-00161 Rome, Italy. RP Andonian, G (reprint author), Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. RI Travish, Gil/H-4937-2011 OI Travish, Gil/0000-0002-4787-0949 NR 18 TC 8 Z9 8 U1 0 U2 1 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 JUL 29 PY 2005 VL 95 IS 5 AR 054801 DI 10.1103/PhysRevLett.95.054801 PG 4 WC Physics, Multidisciplinary SC Physics GA 950VW UT WOS:000230887500031 PM 16090882 ER PT J AU Camarero, J Sort, J Hoffmann, A Garcia-Martin, JM Dieny, B Miranda, R Nogues, J AF Camarero, J Sort, J Hoffmann, A Garcia-Martin, JM Dieny, B Miranda, R Nogues, J TI Origin of the asymmetric magnetization reversal behavior in exchange-biased systems: Competing anisotropies SO PHYSICAL REVIEW LETTERS LA English DT Article ID BILAYERS AB The magnetization reversal in exchange-biased ferromagnetic-antiferromagnetic (FM-AFM) bilayers is investigated. Different reversal pathways on each branch of the hysteresis loop, i.e., asymmetry, are obtained both experimentally and theoretically when the magnetic field is applied at certain angles from the anisotropy direction. The range of angles and the magnitude of this asymmetry are determined by the ratio between the FM anisotropy and the interfacial FM-AFM exchange anisotropy. The occurrence of asymmetry is linked with the appearance of irreversibility, i.e., finite coercivity, as well as with the maximum of exchange bias, increasing for larger anisotropy ratios. Our results indicate that asymmetric hysteresis loops are intrinsic to exchange-biased systems and the competition between anisotropies determines the asymmetric behavior of the magnetization reversal. C1 Univ Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, Spain. Univ Autonoma Madrid, Inst Nicolas Cabrera, E-28049 Madrid, Spain. CEA, CNRS, URA2512, SPINTEC, F-38054 Grenoble, France. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA. CSIC, Inst Microelect, Tres Cantos 28760, Spain. Univ Autonoma Barcelona, ICREA, Bellaterra 08193, Spain. Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Spain. RP Univ Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, Spain. RI Garcia-Martin, Jose Miguel/H-4434-2011; Nogues, Josep/D-7791-2012; Microelectronica de Madrid, Instituto de/D-5173-2013; Hoffmann, Axel/A-8152-2009; Sort, Jordi/F-6582-2014; Camarero, Julio/C-4375-2014; OI Garcia-Martin, Jose Miguel/0000-0002-5908-8428; Nogues, Josep/0000-0003-4616-1371; Microelectronica de Madrid, Instituto de/0000-0003-4211-9045; Hoffmann, Axel/0000-0002-1808-2767; Sort, Jordi/0000-0003-1213-3639; Camarero De Diego, Julio/0000-0003-0078-7280 NR 28 TC 199 Z9 204 U1 4 U2 60 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 JUL 29 PY 2005 VL 95 IS 5 AR 057204 DI 10.1103/PhysRevLett.95.057204 PG 4 WC Physics, Multidisciplinary SC Physics GA 950VW UT WOS:000230887500064 PM 16090915 ER PT J AU Cloet, IC Bentz, W Thomas, AW AF Cloet, IC Bentz, W Thomas, AW TI Spin-dependent structure functions in nuclear matter and the polarized EMC effect SO PHYSICAL REVIEW LETTERS LA English DT Article ID EXTENDED NJL MODEL; SCATTERING; DEUTERIUM AB An excellent description of both spin-independent and spin-dependent quark distributions and structure functions has been obtained with a modified Nambu-Jona-Lasinio model, which is free of unphysical thresholds for nucleon decay into quarks-hence incorporating an important aspect of confinement. We utilize this model to investigate nuclear medium modifications to structure functions and find that we are readily able to reproduce both nuclear matter saturation and the experimental F-2N(A)/F-2N ratio, that is, the European Muon Collaboration (EMC) effect. Applying this framework to determine g(1p)(A), we find that the ratio g(1p)(A)/g(1p) differs significantly from unity, with the quenching caused by the nuclear medium being about twice that of the spin-independent case. This represents an exciting result, which, if confirmed experimentally, will reveal much about the quark structure of nuclear matter. C1 Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia. Univ Adelaide, Dept Phys & Math Phys, Adelaide, SA 5005, Australia. Jefferson Lab, Newport News, VA 23606 USA. Tokai Univ, Sch Sci, Dept Phys, Hiratsuka, Kanagawa 2591292, Japan. RP Cloet, IC (reprint author), Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia. EM icloet@physics.adelaide.edu.au; bentz@keyaki.cc.u-tokai.ac.jp; awthomas@jlab.org RI Thomas, Anthony/G-4194-2012 OI Thomas, Anthony/0000-0003-0026-499X NR 21 TC 40 Z9 40 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 JUL 29 PY 2005 VL 95 IS 5 AR 052302 DI 10.1103/PhysRevLett.95.052302 PG 4 WC Physics, Multidisciplinary SC Physics GA 950VW UT WOS:000230887500018 PM 16090869 ER PT J AU Gupta, M Gupta, RP Singh, DJ AF Gupta, M Gupta, RP Singh, DJ TI Origin of the anomalous absence of hydride formation by ZrPd2 SO PHYSICAL REVIEW LETTERS LA English DT Article ID INTERMETALLIC COMPOUNDS; HYDROGEN ABSORPTION; ELECTRONIC-STRUCTURE; MOSI2-TYPE STRUCTURE; BAND-STRUCTURE; ALLOYS; BINARY; SITES; HEAT; H-2 AB Intermetallic compounds based on hydrogen absorbing elements usually form stable hydrides. This is the case for PdZr2. Surprisingly, ZrPd2 does not absorb hydrogen although both compounds have the same crystal structure and satisfy the empirical geometrical criteria for hydride formation. Results of ab initio calculations reveal an unanticipated purely electronic origin. These results have implications in the search for new intermetallics for hydrogen storage. C1 Univ Paris 11, Inst Sci Mat, F-91405 Orsay, France. Ctr Etud Nucl Saclay, Serv Rech Met Phys, F-91191 Gif Sur Yvette, France. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RP Gupta, M (reprint author), Univ Paris 11, Inst Sci Mat, EA3547,Batiment 415, F-91405 Orsay, France. RI Singh, David/I-2416-2012 NR 27 TC 13 Z9 13 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 JUL 29 PY 2005 VL 95 IS 5 AR 056403 DI 10.1103/PhysRevLett.95.056403 PG 4 WC Physics, Multidisciplinary SC Physics GA 950VW UT WOS:000230887500046 PM 16090897 ER PT J AU Hogan, MJ Barnes, CD Clayton, CE Decker, FJ Deng, S Emma, P Huang, C Iverson, RH Johnson, DK Joshi, C Katsouleas, T Krejcik, P Lu, W Marsh, KA Mori, WB Muggli, P O'Connell, CL Oz, E Siemann, RH Walz, D AF Hogan, MJ Barnes, CD Clayton, CE Decker, FJ Deng, S Emma, P Huang, C Iverson, RH Johnson, DK Joshi, C Katsouleas, T Krejcik, P Lu, W Marsh, KA Mori, WB Muggli, P O'Connell, CL Oz, E Siemann, RH Walz, D TI Multi-GeV energy gain in a plasma-wakefield accelerator SO PHYSICAL REVIEW LETTERS LA English DT Article ID ELECTRON ACCELERATION; BEAM AB A plasma-wakefield accelerator has accelerated particles by over 2.7 GeV in a 10 cm long plasma module. A 28.5 GeV electron beam with 1.8x10(10) electrons is compressed to 20 mu m longitudinally and focused to a transverse spot size of 10 mu m at the entrance of a 10 cm long column of lithium vapor with density 2.8x10(17) atoms/cm(3). The electron bunch fully ionizes the lithium vapor to create a plasma and then expels the plasma electrons. These electrons return one-half plasma period later driving a large amplitude plasma wake that in turn accelerates particles in the back of the bunch by more than 2.7 GeV. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Univ So Calif, Los Angeles, CA 90089 USA. RP Hogan, MJ (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RI Lu, Wei/F-2504-2016 NR 26 TC 112 Z9 114 U1 0 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 JUL 29 PY 2005 VL 95 IS 5 AR 054802 DI 10.1103/PhysRevLett.95.054802 PG 4 WC Physics, Multidisciplinary SC Physics GA 950VW UT WOS:000230887500032 PM 16090883 ER PT J AU Katsura, H Nagaosa, N Balatsky, AV AF Katsura, H Nagaosa, N Balatsky, AV TI Spin current and magnetoelectric effect in noncollinear magnets SO PHYSICAL REVIEW LETTERS LA English DT Article ID WEAK FERROMAGNETISM; ANTIFERROMAGNETICS; EXCHANGE AB A new mechanism of the magnetoelectric effect based on the spin supercurrent is theoretically presented in terms of a microscopic electronic model for noncollinear magnets. The electric polarization (P) over right arrow (ij) produced between the two magnetic moments (S) over right arrow (i) and (S) over right arrow (j) is given by (P) over right arrow proportional to e(ij)x((S) over right arrow (i)x (S) over right arrow (j)) with (e) over right arrow (ij) being the unit vector connecting the sites i and j. Applications to the spiral spin structure and the gauge theoretical interpretation are discussed. C1 Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan. AIST Tsukuba, CERC, Tsukuba, Ibaraki 3058562, Japan. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Katsura, H (reprint author), Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan. RI Nagaosa, Naoto/G-7057-2012 NR 22 TC 1129 Z9 1138 U1 16 U2 172 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 JUL 29 PY 2005 VL 95 IS 5 AR 057205 DI 10.1103/PhysRevLett.95.057205 PG 4 WC Physics, Multidisciplinary SC Physics GA 950VW UT WOS:000230887500065 PM 16090916 ER PT J AU Link, JM Yager, PM Anjos, JC Bediaga, I Castromonte, C Machado, AA Magnin, J Massafferi, A de Miranda, JM Pepe, IM Polycarpo, E dos Reis, AC Carrillo, S Casimiro, E Cuautle, E Sanchez-Hernandez, A Uribe, C Vazquez, F Agostino, L Cinquini, L Cumalat, JP O'Reilly, B Segoni, I Stenson, K Butler, JN Cheung, HWK Chiodini, G Gaines, I Garbincius, PH Garren, LA Gottschalk, E Kasper, PH Kreymer, AE Kutschke, R Wang, M Benussi, L Bertani, M Bianco, S Fabbri, FL Pacetti, S Zallo, A Reyes, M Cawlfield, C Kim, DY Rahimi, A Wiss, J Gardner, R Kryemadhi, A Chung, YS Kang, JS Ko, BR Kwak, JW Lee, KB Cho, K Park, H Alimonti, G Barberis, S Boschini, M Cerutti, A D'Angelo, P DiCorato, M Dini, P Edera, L Erba, S Inzani, P Leveraro, F Malvezzi, S Menasce, D Mezzadri, M Milazzo, L Moroni, L Pedrini, D Pontoglio, C Prelz, F Rovere, M Sala, S Davenport, TF Arena, V Boca, G Bonomi, G Gianini, G Liguori, G Pegna, DL Merlo, MM Pantea, D Ratti, SP Riccardi, C Vitulo, P Gobel, C Hernandez, H Lopez, AM Mendez, H Paris, A Quinones, J Ramirez, JE Zhang, Y Wilson, JR Handler, T Mitchell, R Engh, D Hosack, M Johns, WE Luiggi, E Moore, JE Nehring, M Sheldon, PD Vaandering, EW Webster, M Sheaff, M AF Link, JM Yager, PM Anjos, JC Bediaga, I Castromonte, C Machado, AA Magnin, J Massafferi, A de Miranda, JM Pepe, IM Polycarpo, E dos Reis, AC Carrillo, S Casimiro, E Cuautle, E Sanchez-Hernandez, A Uribe, C Vazquez, F Agostino, L Cinquini, L Cumalat, JP O'Reilly, B Segoni, I Stenson, K Butler, JN Cheung, HWK Chiodini, G Gaines, I Garbincius, PH Garren, LA Gottschalk, E Kasper, PH Kreymer, AE Kutschke, R Wang, M Benussi, L Bertani, M Bianco, S Fabbri, FL Pacetti, S Zallo, A Reyes, M Cawlfield, C Kim, DY Rahimi, A Wiss, J Gardner, R Kryemadhi, A Chung, YS Kang, JS Ko, BR Kwak, JW Lee, KB Cho, K Park, H Alimonti, G Barberis, S Boschini, M Cerutti, A D'Angelo, P DiCorato, M Dini, P Edera, L Erba, S Inzani, P Leveraro, F Malvezzi, S Menasce, D Mezzadri, M Milazzo, L Moroni, L Pedrini, D Pontoglio, C Prelz, F Rovere, M Sala, S Davenport, TF Arena, V Boca, G Bonomi, G Gianini, G Liguori, G Pegna, DL Merlo, MM Pantea, D Ratti, SP Riccardi, C Vitulo, P Gobel, C Hernandez, H Lopez, AM Mendez, H Paris, A Quinones, J Ramirez, JE Zhang, Y Wilson, JR Handler, T Mitchell, R Engh, D Hosack, M Johns, WE Luiggi, E Moore, JE Nehring, M Sheldon, PD Vaandering, EW Webster, M Sheaff, M TI Measurement of the D-s(+) lifetime SO PHYSICAL REVIEW LETTERS LA English DT Article ID FOCUS; SPECTROMETER AB A high statistics measurement of the D-s(+) lifetime from the Fermilab fixed-target FOCUS photoproduction experiment is presented. We describe the analysis of the two decay modes, D-s(+)->phi(1020)pi(+) and D-s(+)->(K) over bar*(892)K-0(+), used for the measurement. The measured lifetime is 507.4 +/- 5.5(stat)+/- 5.1(syst) fs using 8961 +/- 105 D-s(+)->phi(1020)pi(+) and 4680 +/- 90 D-s(+)->(K) over bar*(892)K-0(+) decays. This is a significant improvement over the present world average. C1 Univ Calif Davis, Davis, CA 95616 USA. Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil. CINVESTAV, Mexico City 07000, DF, Mexico. Univ Colorado, Boulder, CO 80309 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Guanajuato, Guanajuato 37150, Mexico. Univ Illinois, Urbana, IL 61801 USA. Indiana Univ, Bloomington, IN 47405 USA. Korea Univ, Seoul 136701, South Korea. Kyungpook Natl Univ, Taegu 702701, South Korea. Ist Nazl Fis Nucl, I-20133 Milan, Italy. Univ Milan, I-20133 Milan, Italy. Univ N Carolina, Asheville, NC 28804 USA. Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy. Ist Nazl Fis Nucl, I-27100 Pavia, Italy. Pontificia Univ Catolica Rio de Janeiro, Rio De Janeiro, Brazil. Univ Puerto Rico, Mayaguez, PR 00681 USA. Univ S Carolina, Columbia, SC 29208 USA. Univ Tennessee, Knoxville, TN 37996 USA. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Wisconsin, Madison, WI 53706 USA. RP Univ Calif Davis, Davis, CA 95616 USA. RI Bonomi, Germano/G-4236-2010; Kwak, Jungwon/K-8338-2012; Anjos, Joao/C-8335-2013; Link, Jonathan/L-2560-2013; Castromonte Flores, Cesar Manuel/O-6177-2014; Benussi, Luigi/O-9684-2014; Gobel Burlamaqui de Mello, Carla /H-4721-2016 OI Bonomi, Germano/0000-0003-1618-9648; Link, Jonathan/0000-0002-1514-0650; Castromonte Flores, Cesar Manuel/0000-0002-9559-3704; Benussi, Luigi/0000-0002-2363-8889; Gobel Burlamaqui de Mello, Carla /0000-0003-0523-495X NR 21 TC 5 Z9 5 U1 0 U2 3 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 JUL 29 PY 2005 VL 95 IS 5 AR 052003 DI 10.1103/PhysRevLett.95.052003 PG 5 WC Physics, Multidisciplinary SC Physics GA 950VW UT WOS:000230887500016 PM 16090867 ER PT J AU Ren, Y Yamada, M Gerhardt, S Ji, HT Kulsrud, R Kuritsyn, A AF Ren, Y Yamada, M Gerhardt, S Ji, HT Kulsrud, R Kuritsyn, A TI Experimental verification of the hall effect during magnetic reconnection in a laboratory plasma SO PHYSICAL REVIEW LETTERS LA English DT Article ID SWEET-PARKER; DISSIPATION; CHALLENGE AB In this Letter we report a clear and unambiguous observation of the out-of-plane quadrupole magnetic field suggested by numerical simulations in the reconnecting current sheet in the magnetic reconnection experiment. Measurements show that the Hall effect is large in the collisionless regime and becomes small as the collisionality increases, indicating that the Hall effect plays an important role in collisionless reconnection. C1 Princeton Univ, Princeton Plasma Phys Lab, Ctr Magnet Self Org Lab & Astrophys Plasmas, Princeton, NJ 08543 USA. RP Ren, Y (reprint author), Princeton Univ, Princeton Plasma Phys Lab, Ctr Magnet Self Org Lab & Astrophys Plasmas, Princeton, NJ 08543 USA. RI Yamada, Masaaki/D-7824-2015 OI Yamada, Masaaki/0000-0003-4996-1649 NR 21 TC 89 Z9 90 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 JUL 29 PY 2005 VL 95 IS 5 AR 055003 DI 10.1103/PhysRevLett.95.055003 PG 4 WC Physics, Multidisciplinary SC Physics GA 950VW UT WOS:000230887500035 PM 16090886 ER PT J AU Campbell, CT Peden, CHF AF Campbell, CT Peden, CHF TI Chemistry - Oxygen vacancies and catalysis on ceria surfaces SO SCIENCE LA English DT Editorial Material ID GAS-SHIFT REACTION; TIO2(110) SURFACE; MICROSCOPIC OBSERVATIONS; CEO2(111) SURFACES; HYDROGEN; BEHAVIOR; ATOMS; AU C1 Univ Washington, Dept Chem, Seattle, WA 98195 USA. Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA. RP Campbell, CT (reprint author), Univ Washington, Dept Chem, Seattle, WA 98195 USA. EM campbell@chem.washington.edu NR 22 TC 426 Z9 446 U1 44 U2 374 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 JUL 29 PY 2005 VL 309 IS 5735 BP 713 EP 714 DI 10.1126/science.1113955 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 951NU UT WOS:000230938200030 PM 16051777 ER PT J AU Wang, Q Kretlow, A Beekes, M Naumann, D Miller, L AF Wang, Q Kretlow, A Beekes, M Naumann, D Miller, L TI In situ characterization of prion protein structure and metal accumulation in scrapie-infected cells by synchrotron infrared and X-ray imaging SO VIBRATIONAL SPECTROSCOPY LA English DT Article; Proceedings Paper CT 3rd International Conference on Shedding Light on Disease - Optical Diagnostics for the New Millenium (SPEC 2004) CY JUN 19-23, 2004 CL Newark, NJ DE transmissible spongiform encephalopathies; prion protein; fluorescence microprobe ID PESTICIDE-INITIATED MODIFICATION; COPPER-BINDING; IR SPECTROSCOPY; TERMINAL DOMAIN; NERVOUS-SYSTEM; UK EPIDEMIC; SLOW VIRUS; IDENTIFICATION; BSE; MICROSPECTROSCOPY AB Transmissible spongiform encephalopathies (TSEs) such as scrapie are neurodegenerative diseases that are characterized by the accumulation of a misfolded prion protein. During the pathogenesis, the normally a-helical prion protein (PrP(C)) refolds to the proteinase K-resistant abnormal form (PrP(Sc)), which is high in beta-sheet content. In this study, dorsal root ganglia from the 263K hamster model of scrapie were cut into 8 mu m thin sections and mounted onto an aluminium-coated glass slide. Single neuronal cells were mapped with synchrotron infrared microspectroscopy to study protein structure and X-ray fluorescence microprobe to determine metal accumulation. Both techniques provide a spatial resolution of 5-10 mu m. Results showed that some IR spectra of the infected cells exhibited a significant frequency shift of the amide I band, where an increased peak intensity was observed at similar to 1631 cm(-1) (attributed to beta-sheet) and a decreased peak intensity at 1658 cm(-1) was also seen (attributed to a-helix). These shifts were not observed in non-infected cells. Adjacent sections were also stained with an antibody for the prion protein in order to confirm that the IR observations were associated with accumulated PrP(Sc). Finally, the same cells were measured by X-ray fluorescence microprobe, which provided the first direct comparison of PrP(Sc) formation and metal ion accumulation. Results showed an accumulation of Fe in cells infected with PrP(Sc). (c) 2005 Elsevier B.V. All rights reserved. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Robert Koch Inst, D-13353 Berlin, Germany. RP Miller, L (reprint author), Brookhaven Natl Lab, Bldg 725D, Upton, NY 11973 USA. EM lmiller@bnl.gov RI Wang, Qi/C-5478-2012; ID, BioCAT/D-2459-2012; OI Beekes, Michael/0000-0002-6454-6657 NR 46 TC 23 Z9 23 U1 0 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0924-2031 J9 VIB SPECTROSC JI Vib. Spectrosc. PD JUL 29 PY 2005 VL 38 IS 1-2 BP 61 EP 69 DI 10.1016/j.vibspec.2005.02.023 PG 9 WC Chemistry, Analytical; Chemistry, Physical; Spectroscopy SC Chemistry; Spectroscopy GA 952UP UT WOS:000231031300010 ER PT J AU Wang, Q Sanad, W Miller, LM Voigt, A Klingel, K Kandolf, R Stangl, K Baumann, G AF Wang, Q Sanad, W Miller, LM Voigt, A Klingel, K Kandolf, R Stangl, K Baumann, G TI Infrared imaging of compositional changes in inflammatory cardiomyopathy SO VIBRATIONAL SPECTROSCOPY LA English DT Article; Proceedings Paper CT 3rd International Conference on Shedding Light on Disease - Optical Diagnostics for the New Millenium (SPEC 2004) CY JUN 19-23, 2004 CL Newark, NJ DE myocarditis; cardiomyopathy; infrared imaging; extracellular matrix remodeling ID IDIOPATHIC DILATED CARDIOMYOPATHY; SYRIAN-HAMSTER; MICROSPECTROSCOPY; MYOCARDITIS; SPECTROSCOPY; COLLAGEN; VIRUS; HEART; PREVALENCE; MICROSCOPY AB Myocarditis is an inflammatory disorder that affects heart muscle cells and results in their dysfunction. The group B coxsackieviruses are the most common agents of myocarditis. In most cases the disease is self-limiting; however, idiopathic dilated cardiomyopathy may in many instances represent the end stage of an immunologically mediated disease initiated by an episode of enteroviral myocarditis. Studies indicated that inflammatory dilated cardiomyopathy accounts for about 25% of the cases of heart failure in the United States. Earlier studies on a cardiomyopathic Syrian hamster model have shown that extracellular matrix remodeling plays a significant role in the cardiac dysfunction [I.M. Dixon, H. Ju, N.L. Reid, T. Scammell-La Fleur, J.P. Werner, G. Jasmin, J. Mol. Cell. Cardiol. 29 (7) (1997) 1837-1850] and previous FTIR microspectroscopy studies demonstrated elevated fibrillar collagen in the pathological myocardium [K.M. Gough, D. Zelinski, R. Wiens, M. Rak, I.M. Dixon, Anal. Biochem. 316 (2) (2003) 232-242]. The aim of this study was to investigate the chemical composition of the myocardium in an immuno-resistant (C57BL/6) and an immuno-permissive (ABY/SnJ) mouse model of cardiomyopathy, using Fourier transform infrared imaging (FTIRI). Cross-sections (8 mu m thick) of heart muscle tissue from murine CVB-models were acquired at 4, 8, and 28 days post-inoculation with the virus, mounted on infrared-reflective glass slides, and FTIRI was performed (n = 2 for each stage). Age-matched controls were also examined (n = 3). The composition and distribution of proteins and lipids were obtained at a pixel resolution of 6.25 mu m. Specifically, the lipid/protein ratio (area ratio of 3000-2800/1700-1600 cm(-1)) and the collagen content (correlation analysis from 1400 to 1000 cm(-1)) were determined. Results from both mouse models showed that the lipid/protein ratio decreased as the collagen content increased, suggesting extracellular matrix remodeling. In the permissive model (ABY/SnJ), the lipid/protein ratio decreased and the collagen content increased continuously as the disease progressed. However, in the resistant model (C57BL/6), the lipid/protein ratio decreased and the collagen content increased in the early stages of the disease (4 and 8 days), but then reversed in the later stages (28 days), suggesting a recovery from the disease. These results demonstrate chemical differences between the inflammatory responses in these two mouse models, providing insight into why the disease can be self-limiting in some cases while fatal in others. (c) 2005 Elsevier B.V. All rights reserved. C1 Brookhaven Natl Lab, Natsyn, Upton, NY 11973 USA. Humboldt Univ, Charite Med Sch, Berlin, Germany. Univ Tubingen, Inst Pathol, D-7400 Tubingen, Germany. RP Miller, LM (reprint author), Brookhaven Natl Lab, Natsyn, Bldg 725D, Upton, NY 11973 USA. EM lmiller@bnl.gov RI Wang, Qi/C-5478-2012; Voigt, Antje/E-4332-2013 NR 34 TC 15 Z9 15 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0924-2031 J9 VIB SPECTROSC JI Vib. Spectrosc. PD JUL 29 PY 2005 VL 38 IS 1-2 BP 217 EP 222 DI 10.1016/j.vibspec.2005.02.011 PG 6 WC Chemistry, Analytical; Chemistry, Physical; Spectroscopy SC Chemistry; Spectroscopy GA 952UP UT WOS:000231031300030 ER PT J AU Miller, LM Smith, RJ AF Miller, LM Smith, RJ TI Synchrotrons versus globars, point-detectors versus focal plane arrays: Selecting the best source and detector for specific infrared microspectroscopy and imaging applications SO VIBRATIONAL SPECTROSCOPY LA English DT Article; Proceedings Paper CT 3rd International Conference on Shedding Light on Disease - Optical Diagnostics for the New Millenium (SPEC 2004) CY JUN 19-23, 2004 CL Newark, NJ DE synchrotrons; globar; point-detectors; focal plane arrays; FTIRM; FTIRI ID RADIATION; PERFORMANCE AB Fourier transform infrared microspectroscopy (FTIRM) and imaging (FTIRI) have become valuable techniques for examining the chemical composition of materials on a microscopic scale. Most IR microscopes are equipped with conventional thermal (globar) IR sources and single-element (point) detectors. Recently, the spatial resolution of IR microspectroscopy has been dramatically improved by using synchrotron light as the IR source. Also, the data collection rates of the technique have radically increased through the implementation of one- and two-dimensional focal plane array detectors. The choice of IR source and detector is important, and depends on the particular application. In this work, we show the differences between conventional globar IR sources and synchrotron light, and between a single-point-detector and focal plane array (FPA). These comparisons provide guidance for the preferable IR source and detector based on the type of application. (c) 2005 Elsevier B.V. All rights reserved. C1 Brookhaven Natl Lab, Natl Synchroton Light Source, Upton, NY 11973 USA. RP Miller, LM (reprint author), Brookhaven Natl Lab, Natl Synchroton Light Source, Bldg 725D,POB 5000, Upton, NY 11973 USA. EM lmiller@bnl.gov NR 14 TC 63 Z9 63 U1 0 U2 16 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0924-2031 J9 VIB SPECTROSC JI Vib. Spectrosc. PD JUL 29 PY 2005 VL 38 IS 1-2 BP 237 EP 240 DI 10.1016/j.vibspec.2005.03.010 PG 4 WC Chemistry, Analytical; Chemistry, Physical; Spectroscopy SC Chemistry; Spectroscopy GA 952UP UT WOS:000231031300033 ER PT J AU Ding, J Ye, WJ Gray, LJ AF Ding, J Ye, WJ Gray, LJ TI An accelerated surface discretization-based BEM approach for non-homogeneous linear problems in 3-D complex domains SO INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING LA English DT Article DE Poisson equation; BEM; volume integral; fast algorithm; precorrected-FFT technique ID BOUNDARY; INTEGRALS; GEOMETRIES; ALGORITHM; EQUATIONS AB For non-homogeneous or non-linear problems, a major difficulty in applying the boundary element method (BEM) is the treatment of the volume integrals that arise. An accurate scheme that requires no volume discretization is highly desirable. In this paper, we describe an efficient approach, based on the precorrected-FFT technique, for the evaluation of volume integrals resulting from non-homogeneous linear problems. In this approach, the 3-D uniform grid constructed initially to accelerate surface integration is used as the baseline mesh for the evaluation of volume integrals. As such, no volume discretization of the interior problem domain is necessary. Moreover, with the uniform 3-D grid, the matrix sparsification techniques (such as the precorrected-FFT technique used in this work) can be extended to accelerate volume integration in addition to surface integration, thus greatly reducing the computational time. The accuracy and efficiency of our approach are demonstrated through several examples. A 3-D accelerated BEM solver for Poisson equations has been developed and has been applied to a 3-D multiply-connected problem with complex geometries. Good agreement between simulation results and analytical solutions has been obtained. Copyright (c) 2005 John Wiley & Sons, Ltd. C1 Georgia Inst Technol, Woodruff Sch Mech Engn, Atlanta, GA 30332 USA. Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN USA. RP Ye, WJ (reprint author), Georgia Inst Technol, Woodruff Sch Mech Engn, Atlanta, GA 30332 USA. EM wenjing.ye@me.gatech.edu NR 30 TC 14 Z9 14 U1 0 U2 2 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0029-5981 J9 INT J NUMER METH ENG JI Int. J. Numer. Methods Eng. PD JUL 28 PY 2005 VL 63 IS 12 BP 1775 EP 1795 DI 10.1002/nme.1346 PG 21 WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary Applications SC Engineering; Mathematics GA 946JG UT WOS:000230567700006 ER PT J AU Hairston, MR Drake, KA Skoug, R AF Hairston, MR Drake, KA Skoug, R TI Saturation of the ionospheric polar cap potential during the October-November 2003 superstorms SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID INTERPLANETARY MAGNETIC-FIELD; AURORAL RADAR NETWORK; LATITUDE ELECTRIC POTENTIALS; CONVECTION; MODELS; DROP; DMSP AB The question of whether the cross polar cap potential drop in the Earth's ionosphere saturates under conditions of extreme electric field in the solar wind has been tested observationally during the past several years. The challenge to proving the existence of this phenomenon is that periods of such extreme electric fields in the solar wind are relatively rare. The three superstorms of October and November 2003 provided ideal cases for testing this idea. We first review the earlier evidence of the saturation seen by the DMSP-F13 spacecraft during the 31 March 2001 superstorm and other storm events during the 1998-2002 time period. Then we present observations from the DMSP-F13 spacecraft during the October and November 2003 superstorms that show definite evidence of this saturation. In addition, some of the electric fields during these superstorms were almost twice as large as the largest fields previously studied, thus increasing the range of our sample set and further increasing our confidence in the existence of the saturation phenomenon. The data are compared with the saturated potentials predicted by the Hill-Siscoe model to test its validity. The DMSP measurements indicate that the saturation limit of the cross polar cap is about 260 kV. C1 Univ Texas, Ctr Space Sci, Richardson, TX 75083 USA. Los Alamos Natl Lab, Grp ISR1, Los Alamos, NM 87545 USA. RP Hairston, MR (reprint author), Univ Texas, Ctr Space Sci, POB 830638,MS FO22,2601 N Floyd Rd, Richardson, TX 75083 USA. EM hairston@utdallas.edu OI Hairston, Marc/0000-0003-4524-4837 NR 24 TC 41 Z9 42 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD JUL 28 PY 2005 VL 110 IS A9 AR A09S26 DI 10.1029/2004JA010864 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 951QN UT WOS:000230945700002 ER PT J AU McCunn, LR Krisch, MJ Liu, Y Butler, LJ Shu, JN AF McCunn, LR Krisch, MJ Liu, Y Butler, LJ Shu, JN TI A study of the unimolecular dissociation of the 2-buten-2-yl radical via the 193 nm photodissociation of 2-chloro-2-butene SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID THERMAL-ISOMERIZATION; SHOCK-WAVES; 1,3-BUTADIENE; DECOMPOSITION; DEPENDENCE; PYROLYSIS; 2-BUTYNE; DYNAMICS; CHANNELS; ISOMERS AB This work investigates the unimolecular dissociation of the 2-buten-2-yl radical. This radical has three potentially competing reaction pathways: C-C fission to form CH3 + propyne, C-H fission to form H + 1,2-butadiene, and C-H fission to produce H + 2-butyne. The experiments were designed to probe the branching to the three unimolecular dissociation pathways of the radical and to test theoretical predictions of the relevant dissociation barriers. Our crossed laser-molecular beam studies show that 193 nm photolysis of 2-chloro-2-butene produces 2-buten-2-yl in the initial photolytic step. A minor C-CI bond fission channel forms electronically excited 2-buten-2-yl radicals and the dominant C-Cl bond fission channel produces ground-state 2-buten-2-yl radicals with a range of internal energies that spans the barriers to dissociation of the radical. Detection of the stable 2-buten-2-yl radicals allows a determination of the translational, and therefore internal, energy that marks the onset of dissociation of the radical. The experimental determination of the lowest-energy dissociation barrier gave 31 +/- 2 kcal/mol, in agreement with the 32.8 +/- 2 kcal/mol barrier to C-C fission at the G3//B3LYP level of theory. Our experiments detected products of all three dissociation channels of unstable 2-buten-2-yl as well as a competing HCI elimination channel in the photolysis of 2-chloro2-butene. The results allow us to benchmark electronic structure calculations on the unimolecular dissociation reactions of the 2-buten-2-yl radical as well as the CH3 + propyne and H + 1,2-butadiene bimolecular reactions. They also allow us to critique prior experimental work on the H + 1,2-butadiene reaction. C1 Univ Chicago, James Franck Inst, Chicago, IL 60637 USA. Univ Chicago, Dept Chem, Chicago, IL 60637 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Butler, LJ (reprint author), Univ Chicago, James Franck Inst, Chicago, IL 60637 USA. EM L-Butler@uchicago.edu NR 34 TC 7 Z9 7 U1 1 U2 5 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 JUL 28 PY 2005 VL 109 IS 29 BP 6430 EP 6439 DI 10.1021/jp050970e PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 948DK UT WOS:000230696000006 PM 16833987 ER PT J AU Chen, XY Jensen, MP Liu, GK AF Chen, XY Jensen, MP Liu, GK TI Analysis of energy level structure and excited-state dynamics in a Sm3+ complex with soft-donor ligands: Sm(Et(2)Dtc)(3)(bipy) SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID RARE-EARTH IONS; SELECTIVE COMPLEXATION; TRIVALENT LANTHANIDE; MOLECULAR-STRUCTURE; OPTICAL ABSORPTION; CRYSTAL; INTENSITIES; SPECTRA; CERIUM(III); Y2O3 AB Using both laser-excited fluorescence and optical absorption methods, we have determined 57 crystal-field (CF) energy levels of Sm3+ in crystals of Sm(Et(2)Dtc)(3)(bipy). The analysis of the energy levels is based on a model Hamiltonian consisting of both free-ion and CF terms. The CF modeling of the experimental energy levels yielded physically reasonable Hamiltonian parameters with a final rms deviation of 17.3 cm(-1). in comparison with Sm3+ in other hosts, the CF splitting of Sm3+ in the lattice of Sm(Et2Dtc)3(bipy) is rather weak. The observed fluorescence decay of the (4)G(5/2) manifold is single-exponential, with a lifetime of 24.5 mu s, indicating only one site of Sm3+ in the lattice. According to the Judd-Ofelt theory, values of three intensity parameters were obtained (Omega(2,4,6) = 1.57, 2.65, and 3.65, in units of 10(-20) cm(-1)). The calculated branching ratios for transitions from the (4)G(5/2) manifold are in agreement with experimental values. The calculated radiative lifetime of the (4)G(5/2) manifold is 3.24 ms, and the corresponding fluorescence quantum efficiency is only 0.75%. Efficient multiphonon relaxation processes induced by the localized high-frequency vibrational modes in the bipyridyl group may lead to the extremely low quantum efficiency observed. The thermal line broadening and shifts of the (4)G(5/2)(1)) -> F-6(1/2) transition were observed and fitted very well by the McCumber-Sturge equations with an assumption of Raman phonon scattering processes as the leading relaxation mechanism. The Debye temperature for this crystal is predicted to be 350 K. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Liu, GK (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. EM gkliu@anl.gov RI Chen, Xueyuan/C-5613-2012; Jensen, Mark/G-9131-2012 OI Chen, Xueyuan/0000-0003-0493-839X; Jensen, Mark/0000-0003-4494-6693 NR 31 TC 24 Z9 24 U1 1 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1520-6106 J9 J PHYS CHEM B JI J. Phys. Chem. B PD JUL 28 PY 2005 VL 109 IS 29 BP 13991 EP 13999 DI 10.1021/jp0516700 PG 9 WC Chemistry, Physical SC Chemistry GA 948EF UT WOS:000230698100022 PM 16852756 ER PT J AU Xiong, G Elam, JW Feng, H Han, CY Wang, HH Iton, LE Curtiss, LA Pellin, MJ Kung, M Kung, H Stair, PC AF Xiong, G Elam, JW Feng, H Han, CY Wang, HH Iton, LE Curtiss, LA Pellin, MJ Kung, M Kung, H Stair, PC TI Effect of atomic layer deposition coatings on the surface structure of anodic aluminum oxide membranes SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID RAMAN-SPECTRA; CATALYSTS; FILM; ELECTRODEPOSITION; FABRICATION; TEMPLATES; CHEMISTRY; GROWTH AB Anodic aluminum oxide (AAO) membranes were characterized by UV Raman and FT-IR spectroscopies before and after coating the entire surface (including the interior pore walls) of the AAO membranes by atomic layer deposition (ALD). UV Raman reveals the presence of aluminum oxalate in bulk AAO, both before and after ALD coating with Al2O3, because of acid anion incorporation during the anodization process used to produce AAO membranes. The aluminum oxalate in AAO exhibits remarkable thermal stability, not totally decomposing in air until exposed to a temperature > 900 degrees C. ALD was used to cover the surface of AAO with either Al2O3 or TiO2. Uncoated AAO have FT-IR spectra with two separate types of OH stretches that can be assigned to isolated OH groups and hydrogen-bonded surface OH groups, respectively. In contrast, AAO surfaces coated by ALD with Al2O3 display a single, broad band of hydrogen-bonded OH groups. AAO substrates coated with TiO2 show a more complicated behavior. UV Raman results show that very thin TiO2 coatings (1 nm) are not stable upon annealing to 500 degrees C. In contrast, thicker coatings can totally cover the contaminated alumina surface and are stable at temperatures in excess of 500 degrees C. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. Argonne Natl Lab, Div Energy Syst, Argonne, IL 60439 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Northwestern Univ, Dept Chem, Evanston, IL 60208 USA. Northwestern Univ, Ctr Catalysis & Surface Sci, Evanston, IL 60208 USA. Northwestern Univ, Inst Environm Catalysis, Evanston, IL 60208 USA. RP Curtiss, LA (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Pellin, Michael/B-5897-2008 OI Pellin, Michael/0000-0002-8149-9768 NR 20 TC 76 Z9 78 U1 6 U2 68 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 JUL 28 PY 2005 VL 109 IS 29 BP 14059 EP 14063 DI 10.1021/jp0503415 PG 5 WC Chemistry, Physical SC Chemistry GA 948EF UT WOS:000230698100031 PM 16852765 ER PT J AU Davis, VT Aguilar, A Covington, AM Thompson, JS Calabrese, D Cisneros, C Gulley, MS Halka, M Hanstorp, D Sandstrom, J McLaughlin, BM Gribakin, GF Pegg, DJ AF Davis, VT Aguilar, A Covington, AM Thompson, JS Calabrese, D Cisneros, C Gulley, MS Halka, M Hanstorp, D Sandstrom, J McLaughlin, BM Gribakin, GF Pegg, DJ TI Photo-double detachment from the F- ion SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Article ID INNER-SHELL PHOTODETACHMENT; 2-ELECTRON PHOTOIONIZATION; THRESHOLD; STRENGTHS; STATES; HE AB The correlated process of photodetaching two electrons from the F- ion following the absorption of a single photon has been investigated over an energy range 20-62 eV. In the experiment, a beam of photons from the Advanced Light Source was collinearly merged with a counter-propagating beam of F- ions from a sputter ion source. The F+ ions produced in the interaction region were detected, and the normalized signal was used to monitor the relative cross section for the double-detachment reaction. An absolute scale for the cross section was established by measuring the spatial overlap of the two beams and by determining the efficiency for collection and detection of the F+ ions. The measured cross section is compared with R-matrix and random phase approximation calculations. These calculations show that the Auger decay of the 2s2p(6) core-excited state of the F atom plays a minor role in the production of F+ ions and that double detachment is likely to be dominated by simultaneous correlated ejection of two valence electrons at energies well above threshold. C1 US Mil Acad, Dept Phys, West Point, NY 10996 USA. Univ Nevada, Dept Phys, Reno, NV 89557 USA. Univ Nevada, Chem Phys Program, Reno, NV 89557 USA. Sierra Coll, Dept Phys, Rocklin, CA 95677 USA. Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62251, Morelos, Mexico. Los Alamos Natl Lab, LANCSE Div, Los Alamos, NM 87545 USA. Embry Riddle Aeronaut Univ, Dept Phys, Prescott, AZ 86301 USA. Chalmers, Dept Phys, SE-41296 Gothenburg, Sweden. Univ Gothenburg, SE-41296 Gothenburg, Sweden. Queens Univ Belfast, Dept Appl Math & Theoret Phys, Belfast BT7 1NN, Antrim, North Ireland. Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA. RP Davis, VT (reprint author), US Mil Acad, Dept Phys, West Point, NY 10996 USA. OI Thompson, Jeffrey/0000-0001-9699-5767; Calabrese, Dominic/0000-0003-3933-0739 NR 31 TC 7 Z9 7 U1 1 U2 6 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0953-4075 J9 J PHYS B-AT MOL OPT JI J. Phys. B-At. Mol. Opt. Phys. PD JUL 28 PY 2005 VL 38 IS 14 BP 2579 EP 2589 DI 10.1088/0953-4075/38/14/020 PG 11 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 957BS UT WOS:000231344900022 ER PT J AU Araki, T Enomoto, S Furuno, K Gando, Y Ichimura, K Ikeda, H Inoue, K Kishimoto, Y Koga, M Koseki, Y Maeda, T Mitsui, T Motoki, M Nakajima, K Ogawa, H Ogawa, M Owada, K Ricol, JS Shimizu, I Shirai, J Suekane, F Suzuki, A Tada, K Takeuchi, S Tamae, K Tsuda, Y Watanabe, H Busenitz, J Classen, T Djurcic, Z Keefer, G Leonard, D Piepke, A Yakushev, E Berger, BE Chan, YD Decowski, MP Dwyer, DA Freedman, SJ Fujikawa, BK Goldman, J Gray, F Heeger, KM Hsu, L Lesko, KT Luk, KB Murayama, H O'Donnell, T Poon, AWP Steiner, HM Winslow, LA Mauger, C McKeown, RD Vogel, P Lane, CE Miletic, T Guillian, G Learned, JG Maricic, J Matsuno, S Pakvasa, S Horton-Smith, GA Dazeley, S Hatakeyama, S Rojas, A Svoboda, R Dieterle, BD Detwiler, J Gratta, G Ishii, K Tolich, N Uchida, Y Batygov, M Bugg, W Efremenko, Y Kamyshkov, Y Kozlov, A Nakamura, Y Karwowski, HJ Markoff, DM Nakamura, K Rohm, RM Tornow, W Wendell, R Chen, MJ Wang, YF Piquemal, F AF Araki, T Enomoto, S Furuno, K Gando, Y Ichimura, K Ikeda, H Inoue, K Kishimoto, Y Koga, M Koseki, Y Maeda, T Mitsui, T Motoki, M Nakajima, K Ogawa, H Ogawa, M Owada, K Ricol, JS Shimizu, I Shirai, J Suekane, F Suzuki, A Tada, K Takeuchi, S Tamae, K Tsuda, Y Watanabe, H Busenitz, J Classen, T Djurcic, Z Keefer, G Leonard, D Piepke, A Yakushev, E Berger, BE Chan, YD Decowski, MP Dwyer, DA Freedman, SJ Fujikawa, BK Goldman, J Gray, F Heeger, KM Hsu, L Lesko, KT Luk, KB Murayama, H O'Donnell, T Poon, AWP Steiner, HM Winslow, LA Mauger, C McKeown, RD Vogel, P Lane, CE Miletic, T Guillian, G Learned, JG Maricic, J Matsuno, S Pakvasa, S Horton-Smith, GA Dazeley, S Hatakeyama, S Rojas, A Svoboda, R Dieterle, BD Detwiler, J Gratta, G Ishii, K Tolich, N Uchida, Y Batygov, M Bugg, W Efremenko, Y Kamyshkov, Y Kozlov, A Nakamura, Y Karwowski, HJ Markoff, DM Nakamura, K Rohm, RM Tornow, W Wendell, R Chen, MJ Wang, YF Piquemal, F TI Experimental investigation of geologically produced antineutrinos with KamLAND SO NATURE LA English DT Article ID EARTH; GEOPHYSICS; OSCILLATIONS; TERRESTRIAL; NEUTRINOS; DECAY; FLUX AB The detection of electron antineutrinos produced by natural radioactivity in the Earth could yield important geophysical information. The Kamioka liquid scintillator antineutrino detector (KamLAND) has the sensitivity to detect electron antineutrinos produced by the decay of U-238 and Th-232 within the Earth. Earth composition models suggest that the radiogenic power from these isotope decays is 16 TW, approximately half of the total measured heat dissipation rate from the Earth. Here we present results from a search for geoneutrinos with KamLAND. Assuming a Th/U mass concentration ratio of 3.9, the 90 per cent confidence interval for the total number of geoneutrinos detected is 4.5 to 54.2. This result is consistent with the central value of 19 predicted by geophysical models. Although our present data have limited statistical power, they nevertheless provide by direct means an upper limit (60 TW) for the radiogenic power of U and Th in the Earth, a quantity that is currently poorly constrained. C1 Tohoku Univ, Res Ctr Neutrino Sci, Sendai, Miyagi 9808578, Japan. Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. CALTECH, WK Kellogg Radiat Lab, Pasadena, CA 91125 USA. Drexel Univ, Dept Phys, Philadelphia, PA 19104 USA. Univ Hawaii Manoa, Dept Phys & Astron, Honolulu, HI 96822 USA. Kansas State Univ, Dept Phys, Manhattan, KS 66506 USA. Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA. Univ New Mexico, Dept Phys, Albuquerque, NM 87131 USA. Stanford Univ, Dept Phys, Stanford, CA 94305 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Duke Univ, Dept Phys, Durham, NC 27008 USA. N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA. Univ N Carolina, Dept Phys, Chapel Hill, NC 27599 USA. Inst High Energy Phys, Beijing 100039, Peoples R China. CEN Bordeaux Gradignan, IN2P3, CNRS, F-33175 Gradignan, France. Univ Bordeaux 1, F-33175 Gradignan, France. RP Enomoto, S (reprint author), Tohoku Univ, Res Ctr Neutrino Sci, Sendai, Miyagi 9808578, Japan. EM sanshiro@awa.tohoku.ac.jp; nrtolich@lbl.gov RI MOTOKI, Masakazu/B-4212-2009; Decowski, Patrick/A-4341-2011; Murayama, Hitoshi/A-4286-2011; Horton-Smith, Glenn/A-4409-2011; Kamyshkov, Yuri/J-7999-2016; OI Horton-Smith, Glenn/0000-0001-9677-9167; Kamyshkov, Yuri/0000-0002-3789-7152; Gray, Frederick/0000-0003-4073-8336 NR 29 TC 204 Z9 209 U1 1 U2 29 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD JUL 28 PY 2005 VL 436 IS 7050 BP 499 EP 503 DI 10.1038/nature03980 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 949LE UT WOS:000230788800050 PM 16049478 ER PT J AU Mayorga, E Aufdenkampe, AK Masiello, CA Krusche, AV Hedges, JI Quay, PD Richey, JE Brown, TA AF Mayorga, E Aufdenkampe, AK Masiello, CA Krusche, AV Hedges, JI Quay, PD Richey, JE Brown, TA TI Young organic matter as a source of carbon dioxide outgassing from Amazonian rivers SO NATURE LA English DT Article ID SOIL RESPIRATION; SYSTEM; C-14; CO2; FRACTIONATION; GEOCHEMISTRY; RADIOCARBON; DYNAMICS; STREAM; AGE AB Rivers are generally supersaturated with respect to carbon dioxide, resulting in large gas evasion fluxes that can be a significant component of regional net carbon budgets(1,2). Amazonian rivers were recently shown to outgas more than ten times the amount of carbon exported to the ocean in the form of total organic carbon or dissolved inorganic carbon(1). High carbon dioxide concentrations in rivers originate largely from in situ respiration of organic carbon(1-3), but little agreement exists about the sources or turnover times of this carbon(2,4,5). Here we present results of an extensive survey of the carbon isotope composition (C-13 and C-14) of dissolved inorganic carbon and three size-fractions of organic carbon across the Amazonian river system. We find that respiration of contemporary organic matter (less than five years old) originating on land and near rivers is the dominant source of excess carbon dioxide that drives outgassing in medium to large rivers, although we find that bulk organic carbon fractions transported by these rivers range from tens to thousands of years in age. We therefore suggest that a small, rapidly cycling pool of organic carbon is responsible for the large carbon fluxes from land to water to atmosphere in the humid tropics. C1 Univ Washington, Sch Oceanog, Seattle, WA 98195 USA. Stroud Water Res Ctr, Avondale, PA 19311 USA. Rice Univ, Dept Earth Sci, Houston, TX 77005 USA. USP, CENA, Lab Ecol Isotop, BR-13400970 Piracicaba, SP, Brazil. Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94551 USA. RP Mayorga, E (reprint author), Univ Washington, Sch Oceanog, Seattle, WA 98195 USA. EM emiliomayorga@alum.mit.edu RI Masiello, Caroline/A-2653-2011; OI Masiello, Caroline/0000-0003-2102-6229; Mayorga, Emilio/0000-0003-2574-4623 NR 30 TC 252 Z9 258 U1 5 U2 131 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD JUL 28 PY 2005 VL 436 IS 7050 BP 538 EP 541 DI 10.1038/nature03880 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 949LE UT WOS:000230788800057 PM 16049484 ER PT J AU Lim, HB Kim, D Jung, T Houk, RS Kim, Y AF Lim, HB Kim, D Jung, T Houk, RS Kim, Y TI A radiofrequency plasma in a polydimethylsiloxane (PDMS) microchip SO ANALYTICA CHIMICA ACTA LA English DT Article DE microchip; RF plasma; emission spectroscopy; optical emission sensor ID DIELECTRIC BARRIER DISCHARGE; EMISSION DETECTOR; MICROSTRIP TECHNOLOGY; GAS-CHROMATOGRAPHY; CHIP; MICROPLASMA; SPECTROSCOPY AB This is the first report of an analytical plasma in a polymer (polydimethylsiloxane, PDMS) microchip. The plasma channel has dimensions 2 mm diameter x 50 mm long, is operated at atmospheric pressure in Ar, 27.12 MHz and 70 W, and is viewed axially through a purged fiber optic cable. CF4 gas at 0.1 % in argon yields mainly C, emission bands. This PDMS microchip is manufactured easily, inexpensive, and more tolerant to fluorocarbons than microchip plasmas in silica. Based on these initial results, this PDMS microchip plasma could become useful as a sensor for the fluorocarbon gases emitted in semiconductor process or as a gas chromatography (GC) detector for potential application. (c) 2005 Elsevier B.V. All rights reserved. C1 Dankook Univ, Dept Chem, Seoul 140714, South Korea. Iowa State Univ, Dept Chem, US Dept Energy, Ames Lab, Ames, IA 50010 USA. Proteonik Inc, Ansan 425170, South Korea. RP Lim, HB (reprint author), Dankook Univ, Dept Chem, Hannam Dong Mt 8, Seoul 140714, South Korea. EM plasma@dankook.ac.kr NR 12 TC 8 Z9 8 U1 2 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0003-2670 J9 ANAL CHIM ACTA JI Anal. Chim. Acta PD JUL 27 PY 2005 VL 545 IS 2 BP 119 EP 121 DI 10.1016/j.aca.2005.04.067 PG 3 WC Chemistry, Analytical SC Chemistry GA 944RA UT WOS:000230445300001 ER PT J AU Jeong, S Achermann, M Nanda, J Lvanov, S Klimov, VI Hollingsworth, JA AF Jeong, S Achermann, M Nanda, J Lvanov, S Klimov, VI Hollingsworth, JA TI Effect of the thiol-thiolate equilibrium on the photophysical properties of aqueous CdSe/ZnS nanocrystal quantum dots SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID CDTE C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Hollingsworth, JA (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM jenn@lanl.gov RI Ivanov, Sergei/B-5505-2011; Achermann, Marc/A-1849-2011; OI Achermann, Marc/0000-0002-3939-9309; Jeong, Sohee/0000-0002-9863-1374 NR 17 TC 155 Z9 156 U1 3 U2 53 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 JUL 27 PY 2005 VL 127 IS 29 BP 10126 EP 10127 DI 10.1021/ja042591p PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 948FF UT WOS:000230700700002 PM 16028897 ER PT J AU Zaitseva, N Dai, ZR Leon, FR Krol, D AF Zaitseva, N Dai, ZR Leon, FR Krol, D TI Optical properties of CdSe superlattices SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID QUANTUM-DOT SOLIDS; NANOCRYSTAL SUPERLATTICES; MONODISPERSE NANOCRYSTALS; NANOPARTICLES; PHOTOLUMINESCENCE; ORGANIZATION; GROWTH AB Three-dimensional, faceted assemblies of CdSe nanocrystals were grown to microscopic sizes sufficient for identification and direct characterization. Analyses made by optical, fluorescence, and transmission electron microscopy showed that individual, faceted superlattices are composed of nearly single-size nanocrystals assembled into fee lattices. Photoluminescence was measured in individual superlattices, and the results were compared to the same measurements made in amorphous solid layers and solutions of nanocrystals. Differences in the shape and peak positions of photoluminescence spectra are explained by energy transfer processes determined by nanocrystal size distribution, structure of solid layers, and presence of aggregates in solutions. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Zaitseva, N (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave, Livermore, CA 94551 USA. EM zaitseva1@llnl.gov RI Dai, Zurong/E-6732-2010 NR 30 TC 59 Z9 59 U1 2 U2 18 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 JUL 27 PY 2005 VL 127 IS 29 BP 10221 EP 10226 DI 10.1021/ja051069f PG 6 WC Chemistry, Multidisciplinary SC Chemistry GA 948FF UT WOS:000230700700038 PM 16028933 ER PT J AU Li, M Ellern, A Espenson, JH AF Li, M Ellern, A Espenson, JH TI Studies of C-S bond cleavage reactions of Re(V) dithiolates: Synthesis, reactivity, and mechanism SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID OXYGEN-ATOM TRANSFER; ELECTRONIC-STRUCTURE; TERTIARY PHOSPHINES; THIOLATE LIGANDS; COMPLEXES; RHENIUM; ARYL; OXO; MONOMERIZATION; CHEMISTRY AB A series of rhenium(V) complexes, [(X)(ReO)(dt)(PPh3)] and [(o-SC6H4PPh2)(ReO)(mtp)], were prepared to explore electronic effects on the C-S cleavage reaction that occurs upon reaction with PAr3 at ambient temperature [where X = S(C6H4-P-Z) (Z = OMe, Me, H, F, Cl), OPh, Cl, and SC2H5, and dt is the chelating dithiolate ligand derived from 2-(mercaptomethyl)thiophenol, 1,2-ethanedithiol, 1,3-propanedithiol, 1,3-butanedithiol, and 2,4-pentanedithiol]. The scope and selectivity of the C-S activation were examined. The C-S bond cleavage to form metallacyclic Re(V) complexes with a Re equivalent to S core occurs only for the complexes with mtp and pdt frameworks and X = SAr and SC2H5. The difference in reactivity is due to the different donating abilities of ancillary and dithiolate ligands, especially their,pi-donating ability, which plays a critical role in C-S activation. The kinetics of the C-S activation process was determined; nucleophilic attack of PPh3 on the oxo group of the (ReO)-O-V core appears to be the rate-controlling step. The reaction is accelerated by electron-poor ArS ligands, but is unaffected by the substituents on phosphines. A detailed mechanistic study is presented. The results represent a rare example of migration of alkanethiolate leading to the formation of alkylthiolato complexes. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. RP Espenson, JH (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. EM espenson@iastate.edu NR 43 TC 18 Z9 18 U1 1 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 JUL 27 PY 2005 VL 127 IS 29 BP 10436 EP 10447 DI 10.1021/ja0519334 PG 12 WC Chemistry, Multidisciplinary SC Chemistry GA 948FF UT WOS:000230700700063 PM 16028958 ER PT J AU Covello, P Rodrigue, G AF Covello, P Rodrigue, G TI Solving the Eikonal equation on an adaptive mesh SO APPLIED MATHEMATICS AND COMPUTATION LA English DT Article DE Eikonal equation; fast marching method; line-of-site; adaptive mesh refinement; front propagation ID ALGORITHM; FRONTS; SHAPE AB A fast marching method (FMM) using the line-of-site calculation to solve the eikonal equation is applied to an adaptive mesh. The criteria for refinement are the curvature of the propagating front. It is shown empirically that for cases involving an initial front initiated from a single point in an open three dimensional domain and constant front propagating speed that the FMM with adaptive mesh refinement (AMR) uses roughly an order of magnitude less CPU time and an order of magnitude less CPU memory than the non-AMR FMM to attain a similar level of accuracy. It is also shown that the AMR-FMM refines when the curvature is caused by boundary irregularities and also non-constant front propagating speed. (c) 2004 Elsevier Inc. All rights reserved. C1 Univ Calif Davis, US Dept Energy, Lawrence Livermore Natl Lab, Dept Appl Sci, Livermore, CA 94550 USA. RP Covello, P (reprint author), Univ Calif Davis, US Dept Energy, Lawrence Livermore Natl Lab, Dept Appl Sci, POB 808,L-764, Livermore, CA 94550 USA. EM covello1@llnl.gov; ghrodrigue@ucdavis.edu NR 14 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0096-3003 J9 APPL MATH COMPUT JI Appl. Math. Comput. PD JUL 26 PY 2005 VL 166 IS 3 BP 678 EP 695 DI 10.1016/j.amc.2004.06.061 PG 18 WC Mathematics, Applied SC Mathematics GA 943MX UT WOS:000230359200015 ER PT J AU Gokulan, K Khare, S Ronning, DR Linthicum, SD Sacchettini, JC Rupp, B AF Gokulan, K Khare, S Ronning, DR Linthicum, SD Sacchettini, JC Rupp, B TI Cocrystal structures of NC6.8 Fab identify key interactions for high potency sweetener recognition: Implications for the design of synthetic sweeteners SO BIOCHEMISTRY LA English DT Article ID PROTEIN-COUPLED RECEPTORS; TASTE RECEPTORS; 3-DIMENSIONAL STRUCTURE; CONFORMATIONAL-CHANGES; MONOCLONAL-ANTIBODIES; ELECTRON-DENSITY; MOLECULAR THEORY; TRANSDUCTION; RESPONSES; COMPLEX AB The crystal structures of the murine monoclonal IgG2b(kappa) antibody NC6.8 Fab fragment complexed with high-potency sweetener compound SC45647 and nontasting high-affinity antagonist TES have been determined. The crystal structures show how sweetener potency is fine-tuned by multiple interactions between specific receptor residues and the functionally different groups of the sweeteners. Comparative analysis with the structure of NC6.8 complexed with the super-potency sweetener NC174 reveals that although the same residues in the antigen binding pocket of NC6.8 interact with the zwitterionic, trisubstituted guanidinium sweeteners as well as TES, specific differences exist and provide guidance for the design of new artificial sweeteners. In case of the nonsweetener TES, the interactions with the receptor are indirectly mediated through a hydrogen bonded water network, while the sweeteners bind with high affinity directly to the receptor. The presence of a hydrophobic group interacting with multiple receptor residues as a major determinant for sweet taste has been confirmed. The nature of the hydrophobic group is likely a discriminator for super-versus high-potency sweeteners, which can be exploited in the design of new, highly potent sweetener compounds. Overall similarities and partial conservation of interactions indicate that the NC6.8 Fab surrogate is representing crucial features of the T1R2 taste receptor VFTM binding site. C1 Lawrence Livermore Natl Lab, LLNL BBRP, Livermore, CA 94551 USA. Texas A&M Univ, Dept Biochem & Biophys, College Stn, TX 77843 USA. Texas A&M Univ, Dept Vet Pathobiol, College Stn, TX 77843 USA. RP Sacchettini, JC (reprint author), Lawrence Livermore Natl Lab, LLNL BBRP, L448, Livermore, CA 94551 USA. EM Sacchett@tamu.edu FU NIGMS NIH HHS [P50 GM62410] NR 47 TC 10 Z9 10 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD JUL 26 PY 2005 VL 44 IS 29 BP 9889 EP 9898 DI 10.1021/bi050613u PG 10 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 947FF UT WOS:000230628100008 PM 16026161 ER PT J AU Wu, W Xing, EP Myers, C Mian, IS Bissell, MJ AF Wu, W Xing, EP Myers, C Mian, IS Bissell, MJ TI Evaluation of normalization methods for cDNA microarray data by k-NN classification SO BMC BIOINFORMATICS LA English DT Article ID GENE-EXPRESSION PATTERNS; SOLID TUMORS; RANKING; CANCERS; ERROR AB Background: Non-biological factors give rise to unwanted variations in cDNA microarray data. There are many normalization methods designed to remove such variations. However, to date there have been few published systematic evaluations of these techniques for removing variations arising from dye biases in the context of downstream, higher-order analytical tasks such as classification. Results: Ten location normalization methods that adjust spatial- and/or intensity-dependent dye biases, and three scale methods that adjust scale differences were applied, individually and in combination, to five distinct, published, cancer biology-related cDNA microarray data sets. Leave-one-out cross-validation (LOOCV) classification error was employed as the quantitative end-point for assessing the effectiveness of a normalization method. In particular, a known classifier, k-nearest neighbor (k-NN), was estimated from data normalized using a given technique, and the LOOCV error rate of the ensuing model was computed. We found that k-NN classifiers are sensitive to dye biases in the data. Using NONRM and GMEDIAN as baseline methods, our results show that single-bias-removal techniques which remove either spatial-dependent dye bias ( referred later as spatial effect) or intensity-dependent dye bias ( referred later as intensity effect) moderately reduce LOOCV classification errors; whereas double-bias-removal techniques which remove both spatial- and intensity effect reduce LOOCV classification errors even further. Of the 41 different strategies examined, three two-step processes, IGLOESS-SLFILTERW7, ISTSPLINE-SLLOESS and IGLOESS-SLLOESS, all of which removed intensity effect globally and spatial effect locally, appear to reduce LOOCV classification errors most consistently and effectively across all data sets. We also found that the investigated scale normalization methods do not reduce LOOCV classification error. Conclusion: Using LOOCV error of k-NNs as the evaluation criterion, three double-bias-removal normalization strategies, IGLOESS-SLFILTERW7, ISTSPLINE-SLLOESS and IGLOESS-SLLOESS, outperform other strategies for removing spatial effect, intensity effect and scale differences from cDNA microarray data. The apparent sensitivity of k-NN LOOCV classification error to dye biases suggests that this criterion provides an informative measure for evaluating normalization methods. All the computational tools used in this study were implemented using the R language for statistical computing and graphics. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. Univ Pittsburgh, Med Ctr, Richard P Simmons Ctr Interstitial Lung Dis, Div Pulm Allergy & Crit Care Med, Pittsburgh, PA 15213 USA. Carnegie Mellon Univ, Sch Comp Sci, Ctr Automated Learning & Discovery, Pittsburgh, PA 15213 USA. Carnegie Mellon Univ, Sch Comp Sci, Language Technol Inst, Pittsburgh, PA 15213 USA. RP Wu, W (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. EM wuw2@upmc.edu; epxing@cs.cmu.edu; camyers@lbl.gov; smian@lbl.gov; mjbissell@lbl.gov FU NCI NIH HHS [CA64786 8744] NR 50 TC 34 Z9 36 U1 0 U2 0 PU BIOMED CENTRAL LTD PI LONDON PA MIDDLESEX HOUSE, 34-42 CLEVELAND ST, LONDON W1T 4LB, ENGLAND SN 1471-2105 J9 BMC BIOINFORMATICS JI BMC Bioinformatics PD JUL 26 PY 2005 VL 6 AR 191 DI 10.1186/1471-2105-6-191 PG 21 WC Biochemical Research Methods; Biotechnology & Applied Microbiology; Mathematical & Computational Biology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Mathematical & Computational Biology GA 962UK UT WOS:000231758300001 PM 16045803 ER PT J AU Jain, GR Yang, JS Balasubramanian, M Xu, JJ AF Jain, GR Yang, JS Balasubramanian, M Xu, JJ TI Synthesis, electrochemistry, and structural studies of lithium intercalation of a nanocrystalline Li2MnO3-like compound SO CHEMISTRY OF MATERIALS LA English DT Article ID MANGANESE OXIDES; ION BATTERIES; INSERTION MATERIAL; CRYSTAL-STRUCTURE; SYSTEM; DIFFRACTION; ELECTRODES; CATHODE; NMR; LINI1/2MN1/2O2 AB A nanocrystalline lithium-rich manganese (IV) oxide, synthesized by a low-temperature sol-gel route, is reported as a surprising lithium intercalation host. The composition of the material is very close to Li2MnO3. X-ray diffraction (XRD), electron diffraction, and high-resolution transmission electron microscopy analyses establish that the material possesses a nanocrystalline structure, similar to that of the rock salt monoclinic Li2MnO3, with a crystallite size of about 5 nm. X-ray absorption spectroscopy (XAS) analysis at the Mn K edge indicates that the Mn is in the 4+ oxidation state and in a local atomic/electronic environment similar to that in the rock salt monoclinic Li2MnO3. Unlike the microcrystalline Li2MnO3, which is known to be electrochemically inactive for lithium intercalation or deintercalation, this nanocrystalline counterpart surprisingly yields a reversible intercalation capacity of 0.71-0.87 Li per formula or 163-200 (mA h)/g and a specific energy density of 400-450 (mW h)/g, at different current rates, with excellent capacity retention over repeated cycling. In situ XAS analysis, conducted during discharge and charge, shows the occurrence of highly reversible Faradaic processes, with reduction and oxidation of Mn. Electrochemical data, namely, low hysteresis in the charge/discharge voltage profiles, excellent cycling performance, and the charge coefficient being constantly at unity, in conj. unction with structural data, namely, XAS and XRD collected during/after electrochemical tests showing that the material retains its original structure, establish the excellent electrochemical and structural stability and reversibility of the compound. The role of nanocrystallinity, lack of long-range order, defects, disorder, and nanostructured morphology are discussed to relate to the surprising intercalation properties of this nanocrystalline compound. C1 Rutgers State Univ, Piscataway, NJ 08854 USA. Argonne Natl Lab, Exp Facil Div, Argonne, IL 60439 USA. RP Xu, JJ (reprint author), Rutgers State Univ, Piscataway, NJ 08854 USA. EM johnxu@rci.rutgers.edu NR 53 TC 45 Z9 46 U1 1 U2 80 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD JUL 26 PY 2005 VL 17 IS 15 BP 3850 EP 3860 DI 10.1021/cm0503329 PG 11 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 950HR UT WOS:000230848700009 ER PT J AU Leonard, KJ Sathyamurthy, S Paranthaman, MP AF Leonard, KJ Sathyamurthy, S Paranthaman, MP TI Characterization of BaZrO3 nanoparticles prepared by reverse micelle synthesis SO CHEMISTRY OF MATERIALS LA English DT Article ID SCANNING-TUNNELING-MICROSCOPY; SURFACE-STRUCTURE; BARIUM ZIRCONATE; NANOCRYSTALLINE NICKEL; ALKOXIDE PRECURSORS; LOW-TEMPERATURE; THIN-FILMS; SRTIO3; SPECTROSCOPY; LAMNO3 AB Nanoparticles of BaZrO3 have been prepared through a reverse micelle synthesis. The as-processed particles consisted of amorphous Ba-Zr-O and crystalline Zr0.95O2 particles with an average diameter of approximately 7.5 nm. Conversion of the powders to crystalline BaZrO3 nanoparticles occurred upon heat treatment at 700 degrees C in air for 0.5 h. The heat-treated powder consisted primarily of BaZrO3 and a small quantity of ZrO2, with an average particle size increase to 17.3 nm. The as-processed and heat treated nanoparticles were analyzed by both X-ray diffraction and transmission electron microscopy. The nanocrystalline BaZrO3 particles were characterized as having a faceted octahedral shape with {100} and {111} surfaces. A brief evaluation of the stability of these surfaces is also discussed. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Leonard, KJ (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. EM leonardk@ornl.gov RI Paranthaman, Mariappan/N-3866-2015 OI Paranthaman, Mariappan/0000-0003-3009-8531 NR 52 TC 20 Z9 20 U1 0 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD JUL 26 PY 2005 VL 17 IS 15 BP 4010 EP 4017 DI 10.1021/cm0506454 PG 8 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 950HR UT WOS:000230848700030 ER PT J AU Sabra, KG Gerstoft, P Roux, P Kuperman, WA Fehler, MC AF Sabra, KG Gerstoft, P Roux, P Kuperman, WA Fehler, MC TI Surface wave tomography from microseisms in Southern California SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID NOISE CROSS-CORRELATION; AMBIENT NOISE; FIELDS AB Since it has already been demonstrated that point-to-point seismic propagation Green Functions can be extracted from seismic noise, it should be possible to image Earth structure using the ambient noise field. Seismic noise data from 148 broadband seismic stations in Southern California were used to extract the surface wave arrival-times between all station pairs in the network. The seismic data were then used in a simple, but densely sampled tomographic procedure to estimate the surface wave velocity structure within the frequency range of 0.1-0.2 Hz for a region in Southern California. The result compares favorably with previous estimates obtained using more conventional and elaborate inversion procedures. This demonstrates that coherent noise field between station pairs can be used for seismic imaging purposes. C1 Univ Calif San Diego, Scripps Inst Oceanog, Marine Phys Lab, La Jolla, CA 92093 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Univ Calif San Diego, Scripps Inst Oceanog, Marine Phys Lab, La Jolla, CA 92093 USA. EM ksabra@mpl.ucsd.edu RI Gerstoft, Peter/B-2842-2009; roux, philippe/B-8538-2014; OI Gerstoft, Peter/0000-0002-0471-062X NR 23 TC 258 Z9 270 U1 3 U2 24 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 EI 1944-8007 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD JUL 26 PY 2005 VL 32 IS 14 AR L14311 DI 10.1029/2005GL023155 PG 4 WC Geosciences, Multidisciplinary SC Geology GA 951MJ UT WOS:000230934300006 ER PT J AU Moon, YJ Cho, KS Chae, JC Choe, GS Kim, YH Bong, SC Park, YD AF Moon, YJ Cho, KS Chae, JC Choe, GS Kim, YH Bong, SC Park, YD TI New extrapolation method for coronal mass ejection onset time estimation SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID SOLAR-FLARES; MAGNETIC RECONNECTION; KINEMATIC EVOLUTION; ACCELERATION; PROPAGATION; ERUPTION; CMES; INTERPLANETARY; BURSTS; MODELS AB The onset time of a coronal mass ejection (CME) is usually extrapolated from its speed in a coronagraph using the constant speed method. In this study, we present a new empirical method for extrapolating the onset times of flare-associated CMEs. For this we reexamined seven well-observed CME-flare events whose initial eruption speeds are estimated to be about a few tens of kilometers per second from LASCO C1 coronagraph or loop displacements seen in SOHO/EIT and TRACE images. In this study, the CME onset time is assumed to be the earliest observable time of eruption from these images. We estimated the onset time differences between the CMEs and the associated flares observed in soft X rays. We then compared them with the onset time differences estimated by the constant speed extrapolation method from LASCO C2 positions. It is noted that there is a certain quadratic relation between the CME speed first observed in the LASCO C2 field of view and the observed CME travel time from near the solar surface to the C2 field of view in units of the travel time estimated by the constant speed method. This empirical relation thus enables us to determine the onset times of CMEs without any assumption in CME kinematics. We have applied the new empirical method to 91 flare-associated CMEs that were accompanied by type II bursts. The onset time difference for these events as well as the well-observed events shows that in most cases (about 80%) the CME initiation precedes the onset of the associated flare. This result provides an important clue to the mechanism and relation of CMEs and flares. C1 Korea Astron & Space Sci Inst, Taejon 305348, South Korea. Seoul Natl Univ, Sch Earth & Environm Sci, Astron Program, Seoul, South Korea. Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Korea Astron & Space Sci Inst, 61-1 Whaamdong, Taejon 305348, South Korea. EM yjmoon@kasi.re.kr RI Moon, Yong-Jae/E-1711-2013; Choe, Gwangson/E-2366-2013 NR 35 TC 1 Z9 1 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9380 EI 2169-9402 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD JUL 26 PY 2005 VL 110 IS A7 AR A07103 DI 10.1029/2005JA011098 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 951PZ UT WOS:000230944200004 ER PT J AU Liang, CO Frechet, JMJ AF Liang, CO Frechet, JMJ TI Incorporation of functional guest molecules into an internally functionalizable dendrimer through olefin metathesis SO MACROMOLECULES LA English DT Review ID ENCAPSULATED METAL NANOPARTICLES; POLY(PROPYLENE IMINE) DENDRIMERS; DRUG-DELIVERY APPLICATIONS; LIGHT-EMITTING-DIODES; IN-VIVO EVALUATION; SITE-ISOLATION; ORGANIC CATALYSIS; CORE DENDRIMERS; POLYAMIDOAMINE DENDRIMERS; SUPRAMOLECULAR CHEMISTRY AB A poly(aryl ether) dendrimer bearing 22 allyl groups throughout the interior of the molecule has been prepared using a convergent synthetic approach. The internal functionalities of this dendrimer can be used to attach small molecule guests to the interior of the dendrimer using olefin metathesis. A ruthenium-based Grubbs catalyst was used to covalently attach an allylated pyrene and imidazolidinone via cross-metathesis. The extent of coupling was estimated by UV, NMR, and elemental analysis data. The high tolerance of cross-metathesis to a range of functional groups enables the incorporation of a wide range of molecules and provides access to different inner environments in one step from a single source of dendrimer. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Frechet, JMJ (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM frechet@berkeley.edu OI Frechet, Jean /0000-0001-6419-0163 NR 112 TC 29 Z9 29 U1 2 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD JUL 26 PY 2005 VL 38 IS 15 BP 6276 EP 6284 DI 10.1021/ma050818a PG 9 WC Polymer Science SC Polymer Science GA 947EU UT WOS:000230627000010 ER PT J AU Lovestead, TM Berchtold, KA Bowman, CN AF Lovestead, TM Berchtold, KA Bowman, CN TI An investigation of chain length dependent termination and reaction diffusion controlled termination during the free radical photopolymerization of multivinyl monomers SO MACROMOLECULES LA English DT Article ID CONTROLLED VINYL POLYMERIZATION; PULSED-LASER POLYMERIZATION; BIMOLECULAR TERMINATION; RATE COEFFICIENTS; HIGH-CONVERSION; RATE-CONSTANT; ANALYTICAL EXPRESSION; METHYL-METHACRYLATE; VOLUME RELAXATION; KINETICS AB Recent investigations of dimethacrylate monomers reveal that chain length dependent termination (CLDT) is important during network formation; however, the importance is not a trivial function of double bond conversion or monomer chemistry. Poly(ethylene glycol)-600 dimethacrylate (PEG600DMA) simultaneously exhibits CLDT and reaction diffusion controlled termination and a reaction diffusion coefficient that depends on the cure condition. To investigate this behavior, the impact of light intensity, monomer chemistry, and network formation on the termination mechanism was investigated. The copolymerization of PEG600DMA with increasing di(ethylene glycol) dimethacrylate (DEGDMA) concentrations reveals that the importance of CLDT during reaction diffusion controlled termination is a function of the rubbery or glassy nature of the resulting polymer network. As well, the addition of nonreactive PEG600 to the DEGDMA polymerization increases the importance of CLDT throughout the polymerization and elevates the reaction diffusion coefficient. Finally, electron paramagnetic resonance (EPR) spectroscopy unsteady-state experiments reveal a strong chain length dependence of the termination kinetic constant for long radical chains during the high double bond conversion of both rubbery and glassy dimethacrylates. C1 Los Alamos Natl Lab, Div Mat Sci & Technol, MST7, Los Alamos, NM 87545 USA. Univ Colorado, Dept Biol & Chem Engn, Boulder, CO 80309 USA. Univ Colorado, Hlth Sci Ctr, Dept Restorat Dent, Aurora, CO 80045 USA. RP Bowman, CN (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, MST7, Mail Stop E-549, Los Alamos, NM 87545 USA. EM Christopher.Bowman@colorado.edu RI Bowman, Christopher/B-1490-2008 OI Bowman, Christopher/0000-0001-8458-7723 NR 62 TC 18 Z9 18 U1 1 U2 18 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD JUL 26 PY 2005 VL 38 IS 15 BP 6374 EP 6381 DI 10.1021/ma0505191 PG 8 WC Polymer Science SC Polymer Science GA 947EU UT WOS:000230627000022 ER PT J AU Buonassisi, T Istratov, AA Pickett, MD Marcus, MA Hahn, G Riepe, S Isenberg, J Warta, W Willeke, G Ciszek, TF Weber, ER AF Buonassisi, T Istratov, AA Pickett, MD Marcus, MA Hahn, G Riepe, S Isenberg, J Warta, W Willeke, G Ciszek, TF Weber, ER TI Quantifying the effect of metal-rich precipitates on minority carrier diffusion length in multicrystalline silicon using synchrotron-based spectrally resolved x-ray beam-induced current SO APPLIED PHYSICS LETTERS LA English DT Article ID SOLAR-CELLS; IMPURITY; RECOMBINATION; DEFECT AB Synchrotron-based, spectrally resolved x-ray beam-induced current (SR-XBIC) is introduced as a technique to locally measure the minority carrier diffusion length in semiconductor devices. Equivalence with well-established diffusion length measurement techniques is demonstrated. The strength of SR-XBIC is that it can be combined in situ with other synchrotron-based analytical techniques, such as x-ray fluorescence microscopy (mu-XRF) and x-ray absorption microspectroscopy (mu-XAS), yielding information about the distribution, elemental composition, chemical nature, and effect on minority carrier diffusion length of individual transition metal species in multicrystalline silicon. SR-XBIC, mu-XRF, and mu-XAS measurements were performed on intentionally contaminated multicrystalline silicon, revealing a strong correlation between local concentrations of copper and nickel silicide precipitates and a decrease of minority carrier diffusion length. In addition, the reduction of minority carrier diffusion length due to submicron-sized Cu3Si and NiSi2 precipitates could be decoupled from the influence of homogeneously distributed nanoprecipitates and point defects. (c) 2005 American Institute of Physics. C1 Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Konstanz, Dept Phys, D-78457 Constance, Germany. Fraunhofer Inst Solar Energy Syst, D-79110 Freiburg, Germany. Natl Renewable Energy Lab, Golden, CO USA. RP Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. EM istratov@berkeley.edu RI Buonassisi, Tonio/J-2723-2012; Hahn, Giso/D-3111-2013 NR 16 TC 13 Z9 13 U1 0 U2 11 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0003-6951 EI 1077-3118 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JUL 25 PY 2005 VL 87 IS 4 AR 044101 DI 10.1063/1.1997274 PG 3 WC Physics, Applied SC Physics GA 948OP UT WOS:000230725900073 ER PT J AU Chen, WR Zhang, FC Miao, J Xu, B Dong, XL Cao, LX Qiu, XG Zhao, BR Dai, PC AF Chen, WR Zhang, FC Miao, J Xu, B Dong, XL Cao, LX Qiu, XG Zhao, BR Dai, PC TI Re-entrant spin glass behavior in Mn-rich YMnO3 SO APPLIED PHYSICS LETTERS LA English DT Article ID MANGANESE OXIDES; FRUSTRATION; ALLOY; STATE; ORDER AB We use magnetism and specific heat measurements to investigate the hexagonal Mn-rich YMnO3. It is found that upon cooling from a high temperature, the compound first orders antiferromagnetically at T-N similar to 72 K and then undergoes a re-entrant spin glass (RSG) transition at T-SG similar to 42 K. This RSG behavior results from the competition between the ferromagnetic interaction and the antiferromagnetic interaction, which is related to the intrinsic geometric magnetic frustration in this system. (c) 2005 American Institute of Physics. C1 Chinese Acad Sci, Lab Superconduct, Inst Phys, Beijing 100080, Peoples R China. Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37830 USA. RP Chinese Acad Sci, Lab Superconduct, Inst Phys, POB 603, Beijing 100080, Peoples R China. EM brzhao@aphy.iphy.ac.cn RI Dai, Pengcheng /C-9171-2012 OI Dai, Pengcheng /0000-0002-6088-3170 NR 22 TC 32 Z9 32 U1 3 U2 21 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0003-6951 EI 1077-3118 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JUL 25 PY 2005 VL 87 IS 4 AR 042508 DI 10.1063/1.1991980 PG 3 WC Physics, Applied SC Physics GA 948OP UT WOS:000230725900042 ER PT J AU Hur, N Park, S Guha, S Borissov, A Kiryukhin, V Cheong, SW AF Hur, N Park, S Guha, S Borissov, A Kiryukhin, V Cheong, SW TI Low-field magnetodielectric effect in terbium iron garnets SO APPLIED PHYSICS LETTERS LA English DT Article ID POLARIZATION; TB3FE5O12 AB Materials exhibiting low-field magnetoelectric and magnetodielectric (MD) effects are necessary for utilization of these effects in multifunctional devices. Since large magnetic fields (H) or electric fields (E) are required to produce any significant effect in existing single-phase magnetoelectrics, recent efforts have been largely devoted to the investigation of laminates or thin film composites made of piezoelectric and magnetostrictive materials. In this work, we report large MD effect Delta epsilon/epsilon similar to 3% at remarkably low fields (H < 2 kOe) in a single-phase material, terbium iron garnet. Our results suggest a route towards future applications of the MD effect in advanced devices. (c) 2005 American Institute of Physics. C1 Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA. RP Hur, N (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87544 USA. EM nhur@lanl.gov RI Hur, Namjung/G-3752-2013 NR 22 TC 45 Z9 46 U1 0 U2 14 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JUL 25 PY 2005 VL 87 IS 4 AR 042901 DI 10.1063/1.1997272 PG 3 WC Physics, Applied SC Physics GA 948OP UT WOS:000230725900044 ER PT J AU Seo, KI McIntyre, PC Sun, S Lee, DI Pianetta, P Saraswat, KC AF Seo, KI McIntyre, PC Sun, S Lee, DI Pianetta, P Saraswat, KC TI Chemical states and electronic structure of a HfO2/Ge(001) interface SO APPLIED PHYSICS LETTERS LA English DT Article ID BAND OFFSETS; GERMANIUM; HFO2; FILMS; PHOTOEMISSION; SUBSTRATE; OXIDATION; GE AB We report the chemical bonding structure and valence band alignment at the HfO2/Ge(001) interface by systematically probing various core level spectra as well as valence band spectra using soft x rays at the Stanford Synchrotron Radiation Laboratory. We investigated the chemical bonding changes as a function of depth through the dielectric stack by taking a series of synchrotron photoemission spectra as we etched through the HfO2 film using a dilute hydrogen fluoride solution. We found that a very nonstoichiometric GeOx layer exists at the HfO2/Ge interface. The valence band spectra near the Fermi level in each different film structure were carefully analyzed, and as a result, the valence band offset between Ge and GeOx was determined to be Delta E-v (Ge-GeOx)=2.2 +/- 0.15 eV, and that between Ge and HfO2, Delta E-v (Ge-HfO2)=2.7 +/- 0.15 eV. (c) 2005 American Institute of Physics. C1 Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA. Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA. Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA. RP Seo, KI (reprint author), Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA. EM kiseo@stanford.edu NR 16 TC 43 Z9 43 U1 2 U2 15 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JUL 25 PY 2005 VL 87 IS 4 AR 042902 DI 10.1063/1.2006211 PG 3 WC Physics, Applied SC Physics GA 948OP UT WOS:000230725900045 ER PT J AU Zhang, YF Russo, RE Mao, SS AF Zhang, YF Russo, RE Mao, SS TI Quantum efficiency of ZnO nanowire nanolasers SO APPLIED PHYSICS LETTERS LA English DT Article ID WAVE-GUIDES; LASERS AB Crystalline ZnO nanowires were grown on sapphire and silicon substrates using pulsed-laser deposition. The optical properties of nanowire nanolasers, including their absolute light emission intensity and external and internal quantum efficiencies were experimentally determined. The external differential quantum efficiency was measured to be as high as 60% for lasing ZnO nanowires of 7.5 mu m in length, compared to a value of approximately 10% for photoluminescence. The absolute light emission intensity for individual nanowires was found to be in the vicinity of 0.1 mW. By measuring the dependence of external differential quantum efficiency on the cavity length, the internal quantum efficiency of ZnO nanowire nanolasers was determined to be about 85%. (c) 2005 American Institute of Physics. C1 Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA. RP Mao, SS (reprint author), Lawrence Berkeley Lab, Berkeley, CA 94720 USA. EM ssmao@lbl.gov NR 12 TC 75 Z9 79 U1 2 U2 24 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JUL 25 PY 2005 VL 87 IS 4 AR 043106 DI 10.1063/1.2001754 PG 3 WC Physics, Applied SC Physics GA 948OP UT WOS:000230725900054 ER PT J AU Jang, SB Kang, SH Amine, K Bae, YC Sun, YK AF Jang, SB Kang, SH Amine, K Bae, YC Sun, YK TI Synthesis and improved electrochemical performance of Al (OH)(3)-coated Li[Ni1/3Mn1/3Co1/3]O-2 cathode materials at elevated temperature SO ELECTROCHIMICA ACTA LA English DT Article DE hydroxide; layered cathode materials; coating; rate capability; DSC ID COATED LINI0.5MN1.5O4 SPINEL; LITHIUM-ION BATTERIES; LICOO2 AB Spherical Li[Ni1/3Co1/3Mn1/3]O-2 powders were synthesized from LiOH center dot H2O and coprecipitated spherical metal hydroxide, (Ni1/3Mn1/3Co1/3)(OH)(2) and coated with Al(OH)(3). The Al(OH)(3)-coated Li[Ni1/3Co1/3Mn1/3]O-2 showed a capacity retention of 80% at 320 mA g(-1) (2C-rate) based on 20 mA g(-1)(0.1 C-rate), while the pristine Li[Ni1/3Co1/3Mn1/3]O-2 delivered only 45% at the same current density. Also, unlike pristine Li[Ni1/3Co1/3Mn1/3]O-2, the Al(OH)(3)-coated Li[Ni1/3Co1/3Mn1/3]O-2 cathode exhibits excellent rate capability and good thermal stability. (c) 2005 Elsevier Ltd. All rights reserved. C1 Hanyang Univ, Dept Chem Engn, Ctr Informat & Commun Mat, Seoul 133791, South Korea. Argonne Natl Lab, Electrochem Technol Program, Div Chem Technol, Argonne, IL 60439 USA. RP Sun, YK (reprint author), Hanyang Univ, Dept Chem Engn, Ctr Informat & Commun Mat, Seoul 133791, South Korea. EM yksun@hanyang.ac.kr RI Kang, Sun-Ho/E-7570-2010; Sun, Yang-Kook/B-9157-2013; Amine, Khalil/K-9344-2013 OI Sun, Yang-Kook/0000-0002-0117-0170; NR 15 TC 70 Z9 81 U1 8 U2 49 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0013-4686 J9 ELECTROCHIM ACTA JI Electrochim. Acta PD JUL 25 PY 2005 VL 50 IS 20 BP 4168 EP 4173 DI 10.1016/j.electacta.2005.01.037 PG 6 WC Electrochemistry SC Electrochemistry GA 948GT UT WOS:000230704800018 ER PT J AU Bean, AC Abney, K Scott, BL Runde, W AF Bean, AC Abney, K Scott, BL Runde, W TI Structural characterization of the first hydroxo-bridged plutonium compound, (PuO2)(2)(IO3)(mu(2)-OH)(3) SO INORGANIC CHEMISTRY LA English DT Article ID TRANSITION-METAL IODATES; CRYSTAL-STRUCTURE; SPECIATION; RAMAN AB The hydrothermal reaction of a Pu-239(IV) stock solution in the presence of iodic acid and 1 M KOH produces reddish-brown single crystals Of (PuO2)(2)(IO3)(OH)(3). The structure consists of two-dimensional layers forming in the ac plane and is the first single-crystal structure of plutonium(VI) connected through hydroxide anions. The additional linkage of plutonium centers is completed through iodate ligands. C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Nucl Mat Div, Los Alamos, NM 87545 USA. RP Runde, W (reprint author), Los Alamos Natl Lab, Div Chem, POB 1663, Los Alamos, NM 87545 USA. EM runde@lanl.gov RI Scott, Brian/D-8995-2017 OI Scott, Brian/0000-0003-0468-5396 NR 16 TC 9 Z9 9 U1 1 U2 6 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 JUL 25 PY 2005 VL 44 IS 15 BP 5209 EP 5211 DI 10.1021/ic0507464 PG 3 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 947FX UT WOS:000230629900006 PM 16022517 ER PT J AU Lymar, SV Shafirovich, V Poskrebyshev, GA AF Lymar, SV Shafirovich, V Poskrebyshev, GA TI One-electron reduction of aqueous nitric oxide: A mechanistic revision SO INORGANIC CHEMISTRY LA English DT Article ID INFRARED-SPECTRA; PULSE-RADIOLYSIS; RATE CONSTANTS; SOLID NEON; RADICALS; NITROXYL; SPECTROSCOPY; REACTIVITY; (NO)(2)(-); OXYGEN AB The pulse radiolysis of aqueous NO has been reinvestigated, the variances with the prior studies are discussed, and a mechanistic revision is suggested. Both the hydrated electron and the hydrogen atom reduce NO to yield the ground-state triplet (NO-)-N-3 and singlet (HNO)-H-1, respectively, which further react with NO to produce the N2O2- radical, albeit with the very different specific rates, k((NO-)-N-3 + NO) = (3.0 +/- 0.8) x 10(9) and k((HNO)-H-1 + NO) = (5.8 +/- 0.2) x 10(6) M-1 s(-1). These reactions occur much more rapidly than the spin-forbidden acid-base equilibration of (NO-)-N-3 and (HNO)-H-1 under all experimentally accessible conditions. As a result, (NO-)-N-3 and (HNO)-H-1 give rise to two reaction pathways that are well separated in time but lead to the same intermediates and products. The N2O2- radical extremely rapidly acquires another NO, k(N2O2- + NO) = (5.4 +/- 1.4) x 10(9) M-1 s(-1), producing the closed-shell N3O3- anion, which unimolecularly decays to the final N2O + NO2- products with a rate constant of similar to 300 s(-1). Contrary to the previous belief, N2O2- is Stable with respect to NO elimination, and so is N3O3-. The optical spectra of all intermediates have also been reevaluated. The only intermediate whose spectrum can be cleanly observed in the pulse radiolysis experiments is the N3O3- anion (lambda(max) = 380 nm, epsilon(max) = 3.76 x 10(3) M-1 x cm(-1)). The spectra previously assigned to the NO- anion and to the N2O2- radical are due, in fact, to a mixture of species (mainly N2O2- and N3O3-) and to the N3O3- anion, respectively. Spectral and kinetic evidence suggests that the same reactions occur when (NO-)-N-3 and (HNO)-H-1 are generated by photolysis of the monoprotonated anion of Angeli's salt, HN2O3-, in NO-containing solutions. C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. NYU, Dept Chem, New York, NY 10003 USA. NYU, Radiat & Solid State Lab, New York, NY 10003 USA. RP Lymar, SV (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. EM lymar@bnl.gov RI Poskrebyshev, Gregory/I-9122-2016 OI Poskrebyshev, Gregory/0000-0002-8920-7037 FU NIEHS NIH HHS [5R01 ES11589] NR 38 TC 42 Z9 43 U1 1 U2 15 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 JUL 25 PY 2005 VL 44 IS 15 BP 5212 EP 5221 DI 10.1021/ic0501317 PG 10 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 947FX UT WOS:000230629900007 PM 16022518 ER PT J AU Gracia, FJ Guerrero, S Wolf, EE Miller, JT Kropf, A AF Gracia, FJ Guerrero, S Wolf, EE Miller, JT Kropf, A TI Kinetics, operando FTIR, and controlled atmos here EXAFS study of the effect of sulfur on Pt-supported catalysts during CO oxidation SO JOURNAL OF CATALYSIS LA English DT Article DE sulfur poisoning; Pt/alumina; Pt/silica; hydrocarbon oxidation; EXAFS; IR of adsorbed CO ID RAY-ABSORPTION-SPECTROSCOPY; CARBON-MONOXIDE; 3-WAY CATALYSTS; PARTICLE-SIZE; PLATINUM; ADSORPTION; SURFACE; SO2; PROPANE; RHODIUM AB The effect of the presence of sulfur on the state of the catalytic surface during oxidation reactions on supported Pt catalysts has been investigated by kinetic studies and operando infrared (IR) and in situ extended X-ray absorption fine structure (EXAFS) spectroscopies. The experimental results clearly show that the catalytic surface is not static, and the reaction atmosphere strongly affects the state of the surface and consequently the catalytic activity. The activity results show that the light-off temperature for CO oxidation increases with ex situ H(2)S addition. In Situ IR results show a shift of the linear CO band, indicating a change in the bonding of adsorbed CO due to the presence of Sulfur. Continuous co-feeding of 20 ppm of SO(2) with the reactant mixture also increases the light-off temperature. Activity and IR results demonstrate that alumina acts as a sulfur storage reservoir. This delays the initial deactivation, but after extended time on stream in the presence of SO(2) the activities of the silica- and alumina-supported catalysts are similar. The results indicate that sulfur poisoning is not only due to blocking of the sites where oxygen preferentially adsorbs, but also to modification of the Pt-CO bonding. (c) 2005 Published by Elsevier Inc. C1 Univ Notre Dame, Dept Chem Engn, Notre Dame, IN 46556 USA. BP Res Ctr, Naperville, IL 60563 USA. Argonne Natl Lab, Div Chem Engn, Argonne, IL 60439 USA. RP Wolf, EE (reprint author), Univ Notre Dame, Dept Chem Engn, Notre Dame, IN 46556 USA. EM eduardo.e.wolf.l@nd.edu RI ID, MRCAT/G-7586-2011; Gracia, Francisco/I-2145-2013 OI Gracia, Francisco/0000-0001-5266-3234 NR 35 TC 29 Z9 29 U1 0 U2 28 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9517 J9 J CATAL JI J. Catal. PD JUL 25 PY 2005 VL 233 IS 2 BP 372 EP 387 DI 10.1016/j.jcat.2005.04.016 PG 16 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA 949ET UT WOS:000230768400013 ER PT J AU Voskoboinikov, RE Osetsky, YN Bacon, DJ AF Voskoboinikov, RE Osetsky, YN Bacon, DJ TI Core structure, dislocation energy and Peierls stress for 1/3 {11(2)over-bar-0} edge dislocations with (0001) and {1(1)over-bar-00} slip planes in alpha-Zr SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Intenational Conference on Fundamentals of Plastic Deformation CY SEP 13-17, 2004 CL La Colle sur Loup, FRANCE DE atomic-scale modelling; dislocation core; extended dislocation; stacking fault; Peierls stress AB Atomic-scale simulations of edge dislocations of the 1/3 < 1 1 (2) over bar 0 > (0 0 0 1) and 1/3 < 1 1 (2) over bar 0 > {1 (1) over bar 0 0} slip systems have been carried out using a Finnis-Sinclair-type interatomic potential for a-zirconium. The distribution of atomic displacements in the dislocation core shows that in this model the edge dislocation in the basal plane dissociates into two Shockley partials whereas the dislocation in the prism plane remains undissociated. The effective core radius and core energy are estimated, and dislocation response to increasing applied shear strain is investigated. The core properties and the critical stress for dislocation glide (Peierls stress) depend sensitively on whether the core extends or not. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Liverpool, Dept Engn, Liverpool L69 3BX, Merseyside, England. Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. RP Voskoboinikov, RE (reprint author), Math Inst, OCIAM, 24-29 St Giles, Oxford OX1 3LB, England. EM voskoboynikov@maths.ox.ac.uk NR 10 TC 18 Z9 18 U1 1 U2 5 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 JUL 25 PY 2005 VL 400 BP 45 EP 48 DI 10.1016/j.msea.2005.03.089 PG 4 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 947XZ UT WOS:000230681900009 ER PT J AU Voskoboinikov, RE Osetsky, YN Bacon, DJ AF Voskoboinikov, RE Osetsky, YN Bacon, DJ TI Interaction of 1/3 {11(2)over-bar-0} (0001) edge dislocation with point defect clusters created in displacement cascades in alpha-zirconium SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Intenational Conference on Fundamentals of Plastic Deformation CY SEP 13-17, 2004 CL La Colle sur Loup, FRANCE DE computer simulation; point defect clusters; zirconium; extended dislocation; dislocation-obstacle strength AB Atomic-scale details of the interaction of a 1/3 < 1 1 (2) over bar 0 > (0 0 0 1) edge dislocation, which dissociates in the basal plane, with four typical vacancy and self-interstitial atom (SIA) clusters created by displacement cascades in alpha-zirconium are investigated by computer modelling. A triangular cluster of SIAs lying within a basal atomic plane adjacent to the dislocation glide plane is not absorbed by the dislocation but is pushed along by the leading partial. A 3-D SIA cluster lying across the glide plane is completely absorbed by the dislocation by creation of two super-jogs. The dislocation also climbs by interaction with a prismatic vacancy cluster, but only half of the vacancies are absorbed in this case. For a cluster formed from a basal platelet of vacancies, the dislocation experiences a glide resistance, but both the line and cluster are fully restored after breakaway. Stress-strain curves and the critical stress for dislocation breakaway from a cluster are presented. (c) 2005 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. Univ Liverpool, Dept Engn, Liverpool L69 3GH, Merseyside, England. Univ Liverpool, Dept Engn, Liverpool L69 3GH, Merseyside, England. Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. RP Voskoboinikov, RE (reprint author), Math Inst, OCIAM, 24-29 St Giles, Oxford OX1 3LB, England. EM voskoboynikov@maths.ox.ac.uk NR 9 TC 15 Z9 15 U1 1 U2 3 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 JUL 25 PY 2005 VL 400 BP 49 EP 53 DI 10.1016/j.msea.2005.03.055 PG 5 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 947XZ UT WOS:000230681900010 ER PT J AU Voskoboynikov, RE Osetsky, YN Bacon, DJ AF Voskoboynikov, RE Osetsky, YN Bacon, DJ TI Self-interstitial atom clusters as obstacles to glide of 1/3 {11(2)over-bar-0} {1(1)over-bar-00} edge dislocations in alpha-zirconium SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Intenational Conference on Fundamentals of Plastic Deformation CY SEP 13-17, 2004 CL La Colle sur Loup, FRANCE DE computer simulation; point defect clusters; zirconium; dislocation-obstacle strength; dislocation loop AB Atomic-scale details of interaction of a 1/3 < 1 1 (2) over bar 0 > {1 (1) over bar 0 0} edge dislocation with clusters of self-interstitial atoms (SIAs) in alpha-zirconium has been studied by computer simulation. Four typical clusters are considered. A triangular cluster of five SIAs lying within a basal plane bisected by the dislocation glide plane is not absorbed by the dislocation but acts as a moderately strong obstacle. A 3-D SIA cluster lying across the glide plane is completely absorbed by the dislocation by creation of super-jogs, and is a weak obstacle. Interaction of the dislocation with glissile SIA loops with perfect Burgers vector inclined at 60 degrees to the dislocation glide plane shows that the process depends on the vector orientation. Defects of the two orientations are strong obstacles, and one, which initially forms a sessile segment on the dislocation line, is particularly so. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Liverpool, Dept Engn, Liverpool L69 3GH, Merseyside, England. Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. RP Voskoboynikov, RE (reprint author), Math Inst, OCIAM, 24-29 St Giles, Oxford OX1 3LB, England. EM voskoboynikov@maths.ox.ac.uk NR 9 TC 19 Z9 19 U1 0 U2 1 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD JUL 25 PY 2005 VL 400 BP 54 EP 58 DI 10.1016/j.msea.2005.03.056 PG 5 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 947XZ UT WOS:000230681900011 ER PT J AU Zhou, Z Dudarev, SL Jenkins, ML Sutton, AP Kirk, MA AF Zhou, Z Dudarev, SL Jenkins, ML Sutton, AP Kirk, MA TI On the atomic displacement fields of small interstitial dislocation loops SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Intenational Conference on Fundamentals of Plastic Deformation CY SEP 13-17, 2004 CL La Colle sur Loup, FRANCE DE dislocation loops; displacement fields; anisotropic elasticity; electron diffuse scattering ID BCC METALS; FE AB The atomic displacement fields of dislocation loops of size 1-5 nm formed by self-interstitial atoms in alpha-Fe have been calculated using isotropic elasticity theory and anisotropic elasticity theory, and compared with atomic simulations for loops formed by 43-275 self-interstitial atoms. The atomic displacements predicted by anisotropic elasticity theory were in good agreement with those given by the atomistic simulations at distances greater than 3 nm from the loop plane, but the displacements predicted by isotropic elasticity theory showed significant discrepancies at distances up to 15 nm. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Oxford, Dept Mat, Oxford OX1 3PH, England. UKAEA Euratom Fus Assoc, Theory & Modelling Dept, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England. Helsinki Univ Technol, Lab Computat Engn, FIN-02015 Helsinki, Finland. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Zhou, Z (reprint author), Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England. EM zhongfu.zhou@materials.oxford.ac.uk NR 11 TC 3 Z9 3 U1 0 U2 9 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD JUL 25 PY 2005 VL 400 BP 80 EP 83 DI 10.1016/j.msea.2005.03.065 PG 4 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 947XZ UT WOS:000230681900016 ER PT J AU Tapasa, K Bacon, DJ Osetsky, YN AF Tapasa, K Bacon, DJ Osetsky, YN TI Simulation of dislocation glide in dilute Fe-Cu alloys SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Intenational Conference on Fundamentals of Plastic Deformation CY SEP 13-17, 2004 CL La Colle sur Loup, FRANCE DE iron; copper solute; critical resolved shear stress; solute strengthening; Fe-Cu alloy ID DYNAMICS; MODEL AB The effects on dislocation glide of the substitutional element copper in solution in alpha-iron are being investigated by computer simulation. In the first phase, the critical stress for a 1/2 (1 1 1) {1 1 0} edge dislocation to overcome configurations of either a single or two nearest-neighbour solute atoms is simulated. Molecular statics and dynamics methods are used to simulate effects at temperature equal to and greater than 0 K, respectively. Single copper atoms and nearest-neighbour pairs in the first atomic plane below the glide plane give the strongest barrier to dislocation glide, in partial agreement with elasticity theory. In addition to temperature, obstacle-spacing effects are considered. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Liverpool, Dept Engn, Liverpool L69 3GH, Merseyside, England. RP Tapasa, K (reprint author), Oak Ridge Natl Lab, Div Math & Comp Sci, POB 2008, Oak Ridge, TN 37831 USA. EM kanit@liv.ac.uk OI Osetskiy, Yury/0000-0002-8109-0030 NR 8 TC 9 Z9 9 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 JUL 25 PY 2005 VL 400 BP 109 EP 113 DI 10.1016/j.msea.2005.03.057 PG 5 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 947XZ UT WOS:000230681900023 ER PT J AU Barabash, RI Ice, GE Pang, JWL AF Barabash, RI Ice, GE Pang, JWL TI Gradients of geometrically necessary dislocations from white beam microdiffraction SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Intenational Conference on Fundamentals of Plastic Deformation CY SEP 13-17, 2004 CL La Colle sur Loup, FRANCE DE X-ray diffraction; strain gradient; synchrotron radiation; dislocations ID RAY STRUCTURAL MICROSCOPY; COPPER SINGLE-CRYSTALS; BOUNDARIES; SURFACE; WALLS AB Variations in the local crystallographic orientation due to the presence of geometrically necessary dislocations and dislocation boundaries smear the distribution of intensity near Lane reflections. Here, some simple model distributions of geometrically necessary dislocations, GNDs, are used to estimate the dislocation tensor field from the intensity distribution of Lane peaks. Streaking of the Lane spots is found to be quantitatively and qualitatively distinct depending on the ratio between the absorption coefficient and the GND density gradient. In addition, different slip systems cause distinctly different Laue-pattern streaking. Experimental Lane patterns are therefore sensitive to stored dislocations and GNDs. As an example, white beam microdiffraction was applied to characterize the dislocation arrangement in a deformed polycrystalline Ni grain during in situ uniaxial tension. (c) 2005 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. RP Barabash, RI (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA. EM barabashr@ornl.gov NR 28 TC 21 Z9 21 U1 0 U2 9 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD JUL 25 PY 2005 VL 400 BP 125 EP 131 DI 10.1016/j.msea.2005.03.036 PG 7 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 947XZ UT WOS:000230681900026 ER PT J AU Thomson, R Koslowski, A LeSar, R AF Thomson, R Koslowski, A LeSar, R TI Energetics and noise in dislocation patterning SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Intenational Conference on Fundamentals of Plastic Deformation CY SEP 13-17, 2004 CL La Colle sur Loup, FRANCE DE dislocation microstructures; stochastic dynamics ID PLASTIC-DEFORMATION AB The competition between energy and noise in the patterning transition in deformation is explored by employing a two-dimensional model of parallel straight edge dislocations. We define a generalized force for ordering and show that at mechanical equilibrium, the ordering force is equal to the average back stress noise on the slip plane. (c) 2005 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Thomson, R (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM robbm@toast.net RI LeSar, Richard/G-1609-2012 NR 6 TC 2 Z9 2 U1 1 U2 1 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD JUL 25 PY 2005 VL 400 BP 199 EP 201 DI 10.1016/j.msea.2005.02.086 PG 3 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 947XZ UT WOS:000230681900041 ER PT J AU Robertson, IM Beaudoin, A Al-Fadhalah, K Chun-Ming, L Robach, J Wirth, BD Arsenlis, A Ahn, D Sofronis, P AF Robertson, IM Beaudoin, A Al-Fadhalah, K Chun-Ming, L Robach, J Wirth, BD Arsenlis, A Ahn, D Sofronis, P TI Dislocation-obstacle interactions: Dynamic experiments to continuum modeling SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Intenational Conference on Fundamentals of Plastic Deformation CY SEP 13-17, 2004 CL La Colle sur Loup, FRANCE DE dislocations; obstacles; stress-strain ID TRANSMISSION ELECTRON-MICROSCOPY; CASCADE DAMAGE CONDITIONS; ION-IRRADIATED COPPER; PLASTIC-DEFORMATION; TENSILE PROPERTIES; BCC-METALS; ALLOYS; MICROSTRUCTURE; POLYCRYSTALS; SIMULATION AB Incorporating the interaction of dislocations with obstacles remains a challenge in the development of predictive large-scale plasticity models. The need is particularly important in the elastic-plastic transition region where these interactions can dominate the behavior. By combining post-mortem analysis with dynamic straining in the transmission electron microscope, the atomic processes governing glissile dislocation reactions and interactions with obstacles has been determined. This information has been incorporated at least phenomenologically in models to assess the macroscopic stress-strain response. Two examples will be presented to demonstrate the methodology, The first example considers the interaction of dislocations with small vacancy Frank loops and the formation of defect-free channels in copper, and the second with the influence of imperfect annealing twin boundaries on the macroscopic stress-strain response in silver. In both examples, the importance of grain and twin boundaries as dislocation sources will be demonstrated. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA. Univ Illinois, Dept Mech & Ind Engn, Urbana, IL 61801 USA. Univ Illinois, Dept Theoret & Appl Mech, Urbana, IL 61801 USA. Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA. Lawrence Livermore Natl Lab, Livermore, CA USA. RP Robertson, IM (reprint author), Univ Illinois, Dept Mat Sci & Engn, 1304 W Green St, Urbana, IL 61801 USA. EM ianr@uiuc.edu RI Al-Fadhalah, Khaled/O-3049-2013; Wirth, Brian/O-4878-2015 OI Wirth, Brian/0000-0002-0395-0285 NR 37 TC 20 Z9 21 U1 2 U2 14 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 JUL 25 PY 2005 VL 400 BP 245 EP 250 DI 10.1016/j.msea.2005.04.002 PG 6 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 947XZ UT WOS:000230681900052 ER PT J AU Bacon, DJ Osetsky, YN AF Bacon, DJ Osetsky, YN TI Modelling dislocation-obstacle interactions in metals exposed to an irradiation environment SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Intenational Conference on Fundamentals of Plastic Deformation CY SEP 13-17, 2004 CL La Colle sur Loup, FRANCE DE atomic-scale modelling; dislocations; yield stress; radiation damage ID STACKING-FAULT TETRAHEDRON; 111 SCREW DISLOCATION; ALPHA-IRON; COMPUTER-SIMULATION; MOLECULAR-DYNAMICS; EDGE DISLOCATIONS; CORE STRUCTURE; DISPLACEMENT CASCADES; INTERSTITIAL CLUSTERS; COPPER AB Tadiation of metals with high-energy atomic particles creates obstacles to glide, such as voids, dislocation loops, stacking-fault tetrahedra and irradiation-induced precipitates through which dislocations have to move during plastic flow. Approximations based on the elasticity theory of defects offer the simplest treatment of strengthening, but are deficient in many respects. It is now widely recognised that a multiscale modelling approach should be used, wherein the mechanisms and strength parameters of interaction are derived by simulation of the atomic level to feed higher-level treatments based on continuum mechanics. Atomic-scale simulation has been developed to provide quantitative information on the influence of stress, strain rate and temperature. Recent results of modelling dislocations gliding under stress against obstacles in a variety of metals across a range of temperature are considered. The effects observed include cutting, absorbing and dragging obstacles. Simulations of 0 K provide for direct comparison with results from continuum mechanics, and although some processes can be represented within the continuum treatment of dislocations, others cannot. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Liverpool, Dept Engn Mat Sci & Engn, Liverpool L69 3GH, Merseyside, England. Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA. RP Bacon, DJ (reprint author), Univ Liverpool, Dept Engn Mat Sci & Engn, Brownlow Hill, Liverpool L69 3GH, Merseyside, England. EM djbacon@liv.ac.uk OI Osetskiy, Yury/0000-0002-8109-0030 NR 35 TC 33 Z9 33 U1 5 U2 26 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 JUL 25 PY 2005 VL 400 BP 353 EP 361 DI 10.1016/j.msea.2005.01.061 PG 9 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 947XZ UT WOS:000230681900072 ER PT J AU Kubota, A Wolfer, WG AF Kubota, A Wolfer, WG TI Transition pathways in the unfaulting of dislocation loops SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Intenational Conference on Fundamentals of Plastic Deformation CY SEP 13-17, 2004 CL La Colle sur Loup, FRANCE DE dislocation loops; molecular dynamics; simulation of dislocation dynamics ID METALS; VACANCY AB In order to study the dynamic mechanism of loop unfaulting, we performed large-scale classical molecular dynamics simulations involving computational cells with several millions of atoms. To induce dislocation loop unfaulting, we launched 1 ps duration traction stress pulses at a free surface of the computational box. In many cases, we observe unfaulting to involve both intuitive and complex dislocation processes with multiple Shockley partial dislocations. However, in some instances, we observe unfaulting to occur by a sudden instability of the stacking fault without clear traces of dislocation reactions. (c) 2005 Elsevier B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Wolfer, WG (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. EM wolfer1@llnl.gov NR 14 TC 5 Z9 5 U1 0 U2 0 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 JUL 25 PY 2005 VL 400 BP 362 EP 365 DI 10.1016/j.msea.2005.01.080 PG 4 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 947XZ UT WOS:000230681900073 ER PT J AU Matsukawa, Y Osetsky, YN Stoller, RE Zinkle, SJ AF Matsukawa, Y Osetsky, YN Stoller, RE Zinkle, SJ TI The collapse of stacking-fault tetrahedra by interaction with gliding dislocations SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Intenational Conference on Fundamentals of Plastic Deformation CY SEP 13-17, 2004 CL La Colle sur Loup, FRANCE ID METALS AB The collapse of stacking-fault tetrahedra (SFIF) by gliding dislocations was observed in in situ straining experiments in a transmission electron microscope (TEM). A stacking-fault tetrahedron was collapsed by intersection with a gliding perfect dislocation: only the base portion divided by the gliding plane of the dislocation annihilated, while the apex portion remained intact. As a result of analysis on evolution of atom configuration induced by intersection with perfect dislocation in SFT, it was found that an unusual atom configuration inevitably appeared in one of the ledges formed on stacking-fault planes, which is traditionally called I-ledge: the atoms on adjacent (1 1 1) planes were overlapping each other. The overlapping configuration provides a strong repulsive force, being a conceivable driving force to induce a chain reaction of atom displacements that collapses the SFT base portion. (c) 2005 Published by Elsevier B.V. C1 Oak Ridge Natl Lab, Met & Ceram Div, Oak Ridge, TN 37831 USA. RP Matsukawa, Y (reprint author), Oak Ridge Natl Lab, Met & Ceram Div, Oak Ridge, TN 37831 USA. EM ym2@ornl.gov RI Matsukawa, Yoshitaka/C-2274-2011; Stoller, Roger/H-4454-2011; OI Matsukawa, Yoshitaka/0000-0002-7888-3478; Zinkle, Steven/0000-0003-2890-6915; Osetskiy, Yury/0000-0002-8109-0030 NR 13 TC 20 Z9 20 U1 0 U2 11 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 JUL 25 PY 2005 VL 400 BP 366 EP 369 DI 10.1016/j.msea.2005.01.063 PG 4 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 947XZ UT WOS:000230681900074 ER PT J AU Osetsky, YN Stoller, RE Rodney, D Bacon, DJ AF Osetsky, YN Stoller, RE Rodney, D Bacon, DJ TI Atomic-scale details of dislocation-stacking fault tetrahedra interaction SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Intenational Conference on Fundamentals of Plastic Deformation CY SEP 13-17, 2004 CL La Colle sur Loup, FRANCE DE dislocation; stacking fault tetrahedra; defect-free channels ID DYNAMICS; METALS; ACCUMULATION; MODEL AB Stacking fault tetrahedra (SFTs) are formed during irradiation of f.c.c. metals and alloys with low stacking fault energy. The high number density of SFTs observed suggests that they should contribute to radiation-induced hardening and, therefore, be taken into account when estimating mechanical property changes of irradiated materials. The key issue is to describe the interaction between a moving dislocation and an individual SFT, which is characterized by a small physical scale of about 100 nm.In this paper we present results of an atomistic simulation of edge and screw dislocations interacting with small SFTs at different temperatures and strain rates and present mechanisms which can explain the formation of defect-free channels observed experimentally. Published by Elsevier B.V. C1 Oak Ridge Natl Lab, Comp Sci & Math Div, Computat Mat Sci Grp, Oak Ridge, TN 37831 USA. CNRS, UMR 5010, F-38402 St Martin Dheres, France. Univ Liverpool, Dept Engn, Liverpool L69 3GH, Merseyside, England. RP Osetsky, YN (reprint author), Oak Ridge Natl Lab, Comp Sci & Math Div, Computat Mat Sci Grp, POB 2008, Oak Ridge, TN 37831 USA. EM osetskiyyn@ornl.gov RI Stoller, Roger/H-4454-2011; Rodney, David/I-1688-2012; OI Osetskiy, Yury/0000-0002-8109-0030 NR 11 TC 42 Z9 43 U1 7 U2 24 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 JUL 25 PY 2005 VL 400 BP 370 EP 373 DI 10.1016/j.msea.2005.03.038 PG 4 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 947XZ UT WOS:000230681900075 ER PT J AU Osetsky, YN Bacon, DJ AF Osetsky, YN Bacon, DJ TI Comparison of void strengthening in fcc and bcc metals: Large-scale atomic-level modelling SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Intenational Conference on Fundamentals of Plastic Deformation CY SEP 13-17, 2004 CL La Colle sur Loup, FRANCE DE molecular dynamics; voids; dislocation-obstacle interactions; yield stress; Cu; Fe AB Strengthening due to voids can be a significant radiation effect in metals. Treatment of this by elasticity theory of dislocations is difficult when atomic structure of the obstacle and dislocation is influential. In this paper, we report results of large-scale atomic-level modelling of edge dislocation-void interaction in fcc (copper) and bcc (iron) metals. Voids of up to 5 nm diameter were studied over the temperature range C from 0 to 600 K. We demonstrate that atomistic modelling is able to reveal important effects, which are beyond the continuum approach. Some arise from features of the dislocation core and crystal structure, others involve dislocation climb and temperature effects. Published by Elsevier B.V. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Liverpool, Dept Engn, Liverpool L69 3GH, Merseyside, England. RP Osetsky, YN (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. EM osetskiyyn@ornl.gov OI Osetskiy, Yury/0000-0002-8109-0030 NR 8 TC 46 Z9 46 U1 0 U2 18 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 JUL 25 PY 2005 VL 400 BP 374 EP 377 DI 10.1016/j.msea.2005.02.083 PG 4 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 947XZ UT WOS:000230681900076 ER PT J AU Rong, ZW Bacon, D Osetsky, Y AF Rong, ZW Bacon, D Osetsky, Y TI Dynamics of drag of self-interstitial clusters by an edge dislocation in iron SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Intenational Conference on Fundamentals of Plastic Deformation CY SEP 13-17, 2004 CL La Colle sur Loup, FRANCE DE MD simulation; edge dislocations; self-interstitial loop; loop drag; diffusion ID METALS; MIGRATION; FE AB Self-interstitial atom (SIA) clusters are created in metals under fast neutron irradiation and are believed to interact with dislocations and increase the flow stress. In this paper, atomic-scale computer simulations are used to investigate the dynamic interaction between an edge dislocation and small SIA loops that do not intersect the dislocation glide plane and whose Burgers vector is parallel to it. Such loops can be dragged by a moving dislocation and this effect is simulated as a function of temperature and loop size, spacing, stand-off distance and Burgers vector orientation. The results can be understood in terms of the one-dimensional mobility of SIA loops. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Liverpool, Dept Engn, Liverpool L69 3GH, Merseyside, England. Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA. RP Rong, ZW (reprint author), Univ Liverpool, Dept Engn, Liverpool L69 3GH, Merseyside, England. EM zhouwen@liv.ac.uk OI Osetskiy, Yury/0000-0002-8109-0030 NR 11 TC 9 Z9 9 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 JUL 25 PY 2005 VL 400 BP 378 EP 381 DI 10.1016/j.msea.2005.03.066 PG 4 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 947XZ UT WOS:000230681900077 ER PT J AU Hungerford, AL Fryer, CL Timmes, FX McGhee, K AF Hungerford, AL Fryer, CL Timmes, FX McGhee, K TI Nucleosynthetic signatures of asymmetric supernovae - Lessons from 1-dimensional explosions SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID II SUPERNOVAE; COLLAPSE; STARS AB We review the evidence for asymmetries in explosions, and in particular, the nucleosynthetic signatures from these asymmetries. To guide our intuition for these yields, we have modeled a series of spherically symmetric explosions with a range of explosion energies. Here we present the results from these 1-dimensional simulations, focusing on the yields of the radioactive elements Ti-44 and Ni-56. We find that, although the abundance yields of Ti-44 do depend sensitively on the explosion energy, the trend (whether it increases or decreases with explosion energy) depends very sensitively on the model. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Hungerford, AL (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 13 TC 4 Z9 4 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 JUL 25 PY 2005 VL 758 SI SI BP 15C EP 18C DI 10.1016/j.nuclphysa.2005.05.007 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500005 ER PT J AU Frohlich, C Hauser, P Liebendorfer, M Martinez-Pinedo, G Bravo, E Hix, WR Zinner, NT Thielemann, FK AF Frohlich, C Hauser, P Liebendorfer, M Martinez-Pinedo, G Bravo, E Hix, WR Zinner, NT Thielemann, FK TI The innermost ejecta of core collapse supernovae SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID NEUTRINO TRANSPORT; MASSIVE STARS; NUCLEOSYNTHESIS; EVOLUTION; HYDRODYNAMICS; MECHANISM AB We ensure successful explosions (of otherwise non-explosive models) by enhancing the neutrino luminosity via reducing the neutrino scattering cross sections or by increasing the heating efficiency via enhancing the neutrino absorption cross sections in the heating region. Our investigations show that the resulting electron fraction Y-e in the innermost ejecta is close to 0.5, in some areas even exceeding 0.5. We present the effects of the resulting values for Y-e on the nucleosynthesis yields of the innermost zones of core collapse supernovae. C1 Univ Basel, Dept Phys & Astron, Basel, Switzerland. Univ Toronto, CITA, Toronto, ON, Canada. ICREA, Barcelona, Spain. Inst Estudis Espacials Catalunya, Barcelona, Spain. Univ Politecn Catalunya, Barcelona, Spain. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Aarhus Univ, Inst Phys & Astron, Aarhus, Denmark. RP Frohlich, C (reprint author), Univ Basel, Dept Phys & Astron, Basel, Switzerland. RI Hix, William/E-7896-2011; Bravo, Eduardo/B-1790-2008; Frohlich, Carla/C-4841-2012; Martinez-Pinedo, Gabriel/A-1915-2013; OI Hix, William/0000-0002-9481-9126; Martinez-Pinedo, Gabriel/0000-0002-3825-0131; Bravo, Eduardo/0000-0003-0894-6450 NR 16 TC 4 Z9 4 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD JUL 25 PY 2005 VL 758 SI SI BP 27C EP 30C DI 10.1016/j.nuclphysa.2005.05.009 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500007 ER PT J AU Hix, WR Messer, OEB Mezzacappa, A Sampaio, J Langanke, K Martinez-Pinedo, G Liebendorfer, M Dean, DJ AF Hix, WR Messer, OEB Mezzacappa, A Sampaio, J Langanke, K Martinez-Pinedo, G Liebendorfer, M Dean, DJ TI Nuclear electron capture in core collapse supernovae SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID GRAVITATIONAL COLLAPSE; EQUATION; MODEL; STATE AB The dynamics of stellar core collapse are strongly dependent on nuclear electron capture, primarily on nuclei with masses larger than 60. In prior simulations of core collapse, electron capture on those nuclei has been treated in a highly parameterized fashion, if not ignored. Recent advances in nuclear structure theory have allowed a more realistic treatment to be dew-doped. With this new treatment of electron capture on heavy nuclei come significant changes in the hydrodynamics of core collapse and bounce. We discuss these as well as the sensitivity of these results to the strength of nuclear electron capture. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Univ Chicago, Ctr Astrophys Thermonucl Flashes, Chicago, IL 60637 USA. Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA. Univ Aarhus, Inst Phys & Astron, DK-8000 Aarhus, Denmark. Inst Estudis Espacials Catalunya, E-08034 Barcelona, Spain. Inst Catalana Recerca & Estudis Avancats, E-08010 Barcelona, Spain. Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada. RP Hix, WR (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RI Hix, William/E-7896-2011; Messer, Bronson/G-1848-2012; Martinez-Pinedo, Gabriel/A-1915-2013; Sampaio, Jorge/M-4750-2013; Mezzacappa, Anthony/B-3163-2017 OI Dean, David/0000-0002-5688-703X; Hix, William/0000-0002-9481-9126; Messer, Bronson/0000-0002-5358-5415; Martinez-Pinedo, Gabriel/0000-0002-3825-0131; Sampaio, Jorge/0000-0003-4359-493X; Mezzacappa, Anthony/0000-0001-9816-9741 NR 11 TC 4 Z9 4 U1 0 U2 1 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 JUL 25 PY 2005 VL 758 SI SI BP 31C EP 34C DI 10.1016/j.nuclphysa.2005.05.010 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500008 ER PT J AU Lewis, R Caggiano, J Parikh, A Deibel, C Visser, D Fear, K Parker, P Hix, WR AF Lewis, R Caggiano, J Parikh, A Deibel, C Visser, D Fear, K Parker, P Hix, WR TI Al-26(g,m)+p resonances studied via proton decays of Si-27 SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nuclei in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA C1 Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Yale Univ, Wright Nucl Struct Lab, 272 Whitney Ave, New Haven, CT 06520 USA. EM rachel.lewis@yale.edu RI Visser, Dale/A-8117-2009; Hix, William/E-7896-2011; Fear, Kathleen/B-3463-2015 OI Visser, Dale/0000-0002-2891-4731; Hix, William/0000-0002-9481-9126; Fear, Kathleen/0000-0003-4608-6949 NR 1 TC 1 Z9 1 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 JUL 25 PY 2005 VL 758 SI SI BP 84C EP 85C DI 10.1016/j.nuclphysa.2005.05.166 PG 2 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500020 ER PT J AU Escher, J Ahle, L Bernstein, L Church, JA Dietrich, F Forssen, C Hoffman, R AF Escher, J Ahle, L Bernstein, L Church, JA Dietrich, F Forssen, C Hoffman, R TI Surrogate Nuclear Reactions and the origin of the heavy elements SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nuclei in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID FISSION CROSS-SECTIONS; ACTINIDE NUCLEI AB An innovative method for indirectly determining reaction cross sections via Surrogate Nuclear Reactions is presented. Exploring indirect approaches for obtaining reaction cross sections is important since a large number of nuclear reactions relevant to astrophysics cannot be measured with currently available techniques. A program is outlined for developing a comprehensive framework for planing and interpreting experiments that can yield the cross sections of interest. The applications will focus on reactions involving unstable nuclei that play a key role in the production of the elements between iron and uranium. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA. EM escher1@llnl.gov RI Forssen, Christian/C-6093-2008 OI Forssen, Christian/0000-0003-3458-0480 NR 12 TC 8 Z9 8 U1 1 U2 2 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 JUL 25 PY 2005 VL 758 SI SI BP 86C EP 89C DI 10.1016/j.nuelphysa.2005.05.167 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500021 ER PT J AU Blackmon, JC AF Blackmon, JC TI Measurements with radioactive ion beams: progress and prospects SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nuclei in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID NUCLEAR-REACTIONS; R-PROCESS; SEPARATOR; FRAGMENTATION; INTENSE; MODELS; DECAY AB Radioactive nuclei play an important role in many astrophysical phenomena. Beams of radioactive ions allow the structure of unstable nuclei to be studied and cross sections for reactions of astrophysical interest to be directly measured. Some recent results obtained with radioactive ion beams that are of interest to nuclear astrophysics are surveyed. The capabilities of some radioactive ion beam facilities and prospects for future work are also briefly discussed. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Oak Ridge Natl Lab, Div Phys, POB 2008, Oak Ridge, TN 37831 USA. NR 59 TC 2 Z9 2 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 JUL 25 PY 2005 VL 758 SI SI BP 102C EP 109C DI 10.1016/j.nuclphysa.2005.05.022 PG 8 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500024 ER PT J AU Church, JA Ahle, L Bernstein, LA Cooper, J Dietrich, FS Escher, J Forssen, C Ai, H Amro, H Babilon, M Beausang, C Caggiano, J Heinz, A Hughes, R McCutchan, E Meyer, D Plettner, C Ressler, J Zamfir, V AF Church, JA Ahle, L Bernstein, LA Cooper, J Dietrich, FS Escher, J Forssen, C Ai, H Amro, H Babilon, M Beausang, C Caggiano, J Heinz, A Hughes, R McCutchan, E Meyer, D Plettner, C Ressler, J Zamfir, V TI Determining neutron capture cross sections with the Surrogate Reaction Technique: Measuring decay probabilities with STARS SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nuclei in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA AB Neutron-induced reaction cross sections are sometimes difficult to measure due to target or beam limitations. For two-step reactions proceeding through an equilibrated intermediate state, an alternate "surrogate reaction" technique [1-3] can be applicable, and is currently undergoing investigation at LLNL. Measured decay probabilities for the intermediate nucleus formed in a light-ion reaction can be combined with optical-model calculations for the formation of the same intermediate nucleus via the neutron-induced reaction. The result is an estimation for overall (n,gamma/n/2n) cross sections. As a benchmark, the reaction Zr-92(alpha,alpha'), surrogate for n+Zr-91, was studied at the A.W. Wright Nuclear Structure Laboratory at Yale. Particles were detected in the silicon telescope STARS (Silicon Telescope Array for Reaction Studies) and gamma-ray energies measured with germanium clover detectors from the YRAST (Yale Rochester Array for SpecTroscopy) ball. The experiment and preliminary observations will be discussed. C1 Lawrence Livermore Natl Lab, N Div, Livermore, CA 94550 USA. Yale Univ, AW Wright Nucl Struct Lab, New Haven, CT 06511 USA. RP Lawrence Livermore Natl Lab, N Div, 7000 E Ave,L-414, Livermore, CA 94550 USA. RI Forssen, Christian/C-6093-2008; Ressler, Jennifer Jo/F-2279-2010; Escher, Jutta/E-1965-2013; Heinz, Andreas/E-3191-2014 OI Forssen, Christian/0000-0003-3458-0480; NR 6 TC 8 Z9 8 U1 0 U2 2 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 JUL 25 PY 2005 VL 758 SI SI BP 126C EP 129C DI 10.1016/j.nuclphysa.2005.05.169 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500029 ER PT J AU Forssen, C Ahle, L Bernstein, LA Church, JA Dietrich, FS Escher, J Hoffman, RD AF Forssen, C Ahle, L Bernstein, LA Church, JA Dietrich, FS Escher, J Hoffman, RD TI Theoretical challenges of determining low-energy neutron-capture cross sections via the Surrogate Technique SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA AB Cross sections for radiative neutron capture on unstable nuclei at low energies are difficult to calculate with high precision, and can be impossible to measure directly. It is therefore important to explore alternative methods. The prospects of one such method, the Surrogate Nuclear Reaction Technique, is currently being investigated at Lawrence Livermore National Laboratory. The purpose of this paper is to outline the strategy for combining the results from a surrogate experiment with theoretical calculations in order to extract the desired cross section. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Forssen, C (reprint author), Lawrence Livermore Natl Lab, POB 808,L-414, Livermore, CA 94551 USA. RI Forssen, Christian/C-6093-2008; Escher, Jutta/E-1965-2013 OI Forssen, Christian/0000-0003-3458-0480; NR 3 TC 4 Z9 4 U1 1 U2 2 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 JUL 25 PY 2005 VL 758 SI SI BP 130C EP 133C DI 10.1016/j.nuclphysa.2005.05.026 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500030 ER PT J AU Nesaraja, CD Lingerfelt, EL Scott, JP Smith, MS Hix, WR Bardayan, DW Blackmon, JC Chae, K Guidry, MW Meyer, RA AF Nesaraja, CD Lingerfelt, EL Scott, JP Smith, MS Hix, WR Bardayan, DW Blackmon, JC Chae, K Guidry, MW Meyer, RA TI A new computational infrastructure for nuclear astrophysics SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA AB We discuss the development of a new computational infrastructure to enable the rapid incorporation of the latest nuclear physics results in astrophysics models. This infrastructure includes programs that simplify the generation of reaction rates, manage rate databases, visualize reaction rates, run element synthesis simulations, and visualize simulation results, all hosted at the website www.nucastrodata.org. Features of the program suite and future development are presented. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. RAME Inc, Teaticket, MA 02536 USA. RP Nesaraja, CD (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RI Hix, William/E-7896-2011; OI Hix, William/0000-0002-9481-9126; Nesaraja, Caroline/0000-0001-5571-8341 NR 4 TC 0 Z9 0 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 JUL 25 PY 2005 VL 758 SI SI BP 174C EP 177C DI 10.1016/j.nuclphysa.2005.05.173 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500041 ER PT J AU Sonzogni, AA AF Sonzogni, AA TI Next-generation nuclear data web services SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA AB The National Nuclear Data Center collects, evaluates, and disseminates nuclear physics data for basic nuclear research and applied nuclear technologies. We have recently produced a nuclear data portal featuring modern and powerful servers, relational database software, Linux operating system, and Java programming language. The portal includes nuclear structure, decay and reaction data, as well as literature information. Data can be searched for using optimized query forms; results are presented in tables and interactive plots. Additionally, a number of nuclear science tools, codes, applications, and links are provided. A brief tutorial of the different databases and products will be provided. C1 Natl Nucl Data Ctr, Brookhaven Natl Lab, Upton, NY 11973 USA. RP Sonzogni, AA (reprint author), Natl Nucl Data Ctr, Brookhaven Natl Lab, Bldg 197D, Upton, NY 11973 USA. NR 1 TC 0 Z9 0 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 JUL 25 PY 2005 VL 758 SI SI BP 178C EP 181C DI 10.1016/j.nuclphysa.2005.05.034 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500042 ER PT J AU Johnson, JA Herwig, F Beers, TC Christlieb, N AF Johnson, JA Herwig, F Beers, TC Christlieb, N TI Nitrogen in the early Universe SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID METAL-POOR STARS; NEUTRON-CAPTURE ELEMENTS; INTERMEDIATE-MASS STARS; HAMBURG/ESO SURVEY; CARBON STARS; EVOLUTION; RATIO AB The most important contributor to the nitrogen production in the Universe is predicted to be intermediate mass (IM) asymptotic giant branch (AGB) stars. We test this prediction through observations of the C and N abundances on the surfaces of metal-poor stars that are believed to have accreted material from a (now gone) AGB companion. The [C/N] measurement from our sample and from the literature show [C/N] ratios that are too high to come from IMS AGB stars that have undergone hot bottom burning. We discuss possible solutions to the problem. C1 DAO, HIA, NRC, Victoria, BC V9E 2E7, Canada. Los Alamos Natl Lab, Theoret Astrophys Grp, Los Alamos, NM 87545 USA. Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. Michigan State Univ, Joint Inst Nucl Astrophys, E Lansing, MI 48824 USA. Univ Hamburg, Hamburger Sternwarte, D-21029 Hamburg, Germany. RP Johnson, JA (reprint author), DAO, HIA, NRC, 5071 W Saanich Rd, Victoria, BC V9E 2E7, Canada. NR 17 TC 2 Z9 2 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 JUL 25 PY 2005 VL 758 SI SI BP 221C EP 224C DI 10.1016/j.nuclphysa.2005.05.174 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500049 ER PT J AU Bisterzo, S Pompeia, L Gallino, R Pignatari, M Cunha, K Heger, A Smith, V AF Bisterzo, S Pompeia, L Gallino, R Pignatari, M Cunha, K Heger, A Smith, V TI Cu and Zn in different stellar populations: Inferring their astrophysical origin. SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID DWARF SPHEROIDAL GALAXIES; VLT/UVES ABUNDANCES; CHEMICAL EVOLUTION; GLOBULAR-CLUSTER; OMEGA-CENTAURI; MASSIVE STARS; NUCLEOSYNTHESIS; COPPER; EXPLOSION; PATTERNS AB Copper and Zinc behave differently in unevolved stars of various metallicities and stellar populations. Current hypotheses on the astrophysical origin of both elements are highly debated. It has been advanced in previous works ([1,2]) that most solar Cu and Zn were synthesized in Type Ia Supernovae, although present theory of SNIe explosions predicts very little contribution to both elements [3]. We have collected a large sample of recent high-resolution spectroscopic observations of unevolved stars in the Galactic halo, thick-disk and thin-disk, in bulge-like stars, globular clusters, Omega Cell, and Dwarf Spheroidal systems. Then we compare spectroscopic observations of Cu and Zu with present stellar nucleosynthesis theory. Cu is the best signature of a secondary-like production in massive stars by neutron captures with a small primary contribution by explosive nucleosynthesis. Zn needs a more complex description. No need of extra contribution by SNIa is required. C1 Univ Turin, Dipartimento Fis Gen, I-10125 Turin, Italy. Univ Sao Paulo, Sao Paulo, Brazil. Los Alamos Natl Lab, Los Alamos, NM USA. Univ Texas, El Paso, TX 79968 USA. RP Bisterzo, S (reprint author), Univ Turin, Dipartimento Fis Gen, Via P Giuria 1, I-10125 Turin, Italy. EM sarabisterzo@hotmail.com; luciana.pompeia@obspm.fr; gailino@ph.unito.it; cygno1@yahoo.it OI Pignatari, Marco/0000-0002-9048-6010 NR 22 TC 10 Z9 10 U1 0 U2 2 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 JUL 25 PY 2005 VL 758 SI SI BP 284C EP 287C DI 10.1016/j.nuclphysa.2005.05.049 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500060 ER PT J AU Plag, R Heil, M Kappeler, F Reifarth, R Wisshak, K AF Plag, R Heil, M Kappeler, F Reifarth, R Wisshak, K TI An independent measurement of the C-12(alpha, gamma)O-16 cross section with the Karlsruhe 4 pi BaF2 detector SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nuclei in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID STELLAR ENERGIES AB An independent approach for the measurement of the C-12(alpha, gamma)O-16 cross section at low energies has been performed at Forschungszentrum Karlsruhe using the 4 pi BaF2 detector and the pulsed 3.7 MV Van de Graaff accelerator. Covering the full solid angle, the Karlsruhe 4 pi BaF2 detector combines high gamma-ray efficiency with a 42-fold segmentation. This allows one to measure the total C-12(alpha,gamma)O-16 cross section and the angular distribution simultaneously. The Van de Graaff accelerator was operated in pulsed mode in order to discriminate neutron background from the C-13(alpha,n)O-16 reaction. With a pulse width below 2 ns and beam currents of up to 6 mu A, the cross section could be measured at center of mass energies between 1.0 and 1.51 MeV yielding angular distributions with up to 12 angles. C1 Forschungszentrum Karlsruhe, Inst Kernphys, D-76021 Karlsruhe, Germany. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Forschungszentrum Karlsruhe, Inst Kernphys, Postfach 3640, D-76021 Karlsruhe, Germany. NR 8 TC 7 Z9 7 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 JUL 25 PY 2005 VL 758 SI SI BP 415C EP 418C DI 10.1016/j.nuclphysa.2005.05.076 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500090 ER PT J AU Starrfield, S Hix, WR Timmes, FX Sion, EM Sparks, WM Dwyer, SJ AF Starrfield, S Hix, WR Timmes, FX Sion, EM Sparks, WM Dwyer, SJ TI Studies of accretion onto hot, massive white dwarfs: The growth to the Chandrasekhar Limit? SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID HYDROGEN SHELL FLASHES; X-RAY SOURCES; SUPERNOVAE; VARIABLES AB We report on studies of accretion of material of solar composition at a variety of rates onto hot, massive white dwarfs (WDs). Evolutionary sequences for 1.25 M-circle dot and 1,35 M-circle dot WDs with mass accretion rates varying from 1.6 x 10(-10) M-circle dot yr(-1) to 3.5 x 10(-7) M-circle dot, yr(-1) have now been studied and, in all these cases, the WDs grow in mass to near the Chandrasekhar Limit. The surface conditions of our simulations are similar to observations of Super Soft X-ray binary sources. Our results provide the first confirmation of previous suggestions that some of the Super Soft X-ray binaries may be the progenitors of thermonuclear supernovae. We observe that the abundances in the accreted layers (including carbon and oxygen) are sensitive to the accretion rate, potentially affecting the dynamics of the supernova, explosion and observations of elemental distributions. C1 Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Villanova Univ, Dept Astron & Astrophys, Villanova, PA 19085 USA. Sci Applicat Int Corp, San Diego, CA 92121 USA. RP Hix, WR (reprint author), Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287 USA. RI Hix, William/E-7896-2011 OI Hix, William/0000-0002-9481-9126 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 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD JUL 25 PY 2005 VL 758 SI SI BP 455C EP 458C DI 10.1016/j.nuclphysa.2005.05.084 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500098 ER PT J AU Mathews, GJ Wilson, JR Dearborn, DSP AF Mathews, GJ Wilson, JR Dearborn, DSP TI Supernovae from white dwarfs near black holes SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nuclei in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA AB We describe a new thermonuclear explosion model for Type I (or Type II) supernovae whereby relativistic terms enhance the self gravity of a carbon-oxygen white dwarf (or red-giant core) as it passes or orbits near a black hole. This relativistic compression can cause the central density to exceed the threshold for pycnonuclear or thermonuclear reactions so that an explosion ensues. We have considered three possible environments: 1) white dwarfs orbiting a low-mass (similar to 10 - 20 MD) black hole; 2) white dwarfs encountering a massive (-1 - 3 x 10(3) MD) black hole in a dense globular cluster; and 3) white dwarfs passing a supermassive (similar to 10(6) - log M-circle dot) black hole in a dense galactic core. We estimate the rate at which such events could occur to be significantly less than the rate of normal Type la supernovae for all three classes. Nevertheless, they should be frequent enough to warrant a search for this new class of supernova. We show results of three-dimensional thermonuclear burn calculations of white dwarfs or red-giant cores ignited near a supermassive black hole. Such an event might have produced the observed "mixed-morphology" Sgr A East supernova remnant (SNR) in the Galactic core. C1 Univ Notre Dame, Dept Phys, Ctr Astrophys, Notre Dame, IN 46556 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Univ Notre Dame, Dept Phys, Ctr Astrophys, Notre Dame, IN 46556 USA. NR 8 TC 1 Z9 1 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 JUL 25 PY 2005 VL 758 SI SI BP 467C EP 469C DI 10.1016/j.nuclphysa.2005.05.179 PG 3 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500101 ER PT J AU Lattanzio, JC Lugaro, MA AF Lattanzio, JC Lugaro, MA TI What we do and do not know about the s-process in AGB stars SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID ASYMPTOTIC GIANT BRANCH; GALACTIC CHEMICAL EVOLUTION; NEUTRON-CAPTURE; WHITE-DWARFS; NUCLEOSYNTHESIS; OVERSHOOT; ELEMENTS; BARIUM; RATES; LEAD AB AGB stars are the source for the main component of the s-process. Here we discuss both the properties which are reasonably well known and those which still suffer from substantial uncertainties. In the former case, we are fairly sure that the s-process contribution from AGB stars comes from masses between about 1 and 3 M-circle dot, and the dominant neutron source is the C-13(alpha,n)O-16 reaction. In the latter category remains the formation mechanism for the C-13-pocket. Attempts at including rotation seem to inhibit neutron capture reactions. Explaining the observations seems to require a spread in the size of the C-13-pocket so some stochastic process, such as rotation, must be involved. C1 Monash Univ, Ctr Stellar & Planetary Astrophys, Clayton, Vic 3168, Australia. Lawrence Livermore Natl Lab, IGPP, Livermore, CA 94550 USA. Univ Cambridge, Inst Astron, Cambridge CB2 1TN, England. RP Lattanzio, JC (reprint author), Monash Univ, Ctr Stellar & Planetary Astrophys, Clayton, Vic 3168, Australia. NR 25 TC 14 Z9 14 U1 0 U2 1 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 JUL 25 PY 2005 VL 758 SI SI BP 477C EP 484C DI 10.1016/j.nuclphysa.2005.05.088 PG 8 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500103 ER PT J AU Koehler, PE AF Koehler, PE TI Progress and challenges in determining reaction rates for the s and p processes SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nuclei in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID CAPTURE CROSS-SECTIONS; GIANT BRANCH STARS; NEUTRON-CAPTURE; TRANSMISSION MEASUREMENTS; NUCLEOSYNTHESIS; ANOMALIES; ISOTOPES; SILICON; BARIUM; GRAINS AB Advances in abundance measurements in primitive meteorites and stars as well as progress in astrophysical models are driving the need for more as well as more accurate (n,gamma) reaction-rate measurements. I will describe some recent successes as well as some remaining challenges in measuring the needed rates. In addition, I will briefly discuss how (n,alpha) measurements are helping to constrain (gamma,alpha) rates for the p process, but at the same time have turned up some surprises. C1 Oak Ridge Natl Lab, Phys Div, Oak Ridge, TN 37831 USA. RP Oak Ridge Natl Lab, Phys Div, MS 6356, Oak Ridge, TN 37831 USA. OI Koehler, Paul/0000-0002-6717-0771 NR 30 TC 1 Z9 1 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 JUL 25 PY 2005 VL 758 SI SI BP 493C EP 500C DI 10.1016/j.nuclphysa.2005.05.091 PG 8 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500106 ER PT J AU Abbondanno, U Aerts, G Alvarez-Velarde, F Alvarez-Pol, H Andriamonje, S Andrzejewski, J Badurek, G Baumann, P Becvar, F Benlliure, J Berthoumieux, E Calvino, F Cano-Ott, D Capote, R Cennini, P Chepel, V Chiaveri, E Colonna, N Cortes, G Cortina, D Couture, A Cox, J Dababneh, S Dahlfors, M David, S Dolfini, R Domingo-Pardo, C Duran, I Embid-Segura, M Ferrant, L Ferrari, A Ferreira-Marques, R Frais-Kolbl, H Furman, W Goncalves, I Gallino, R Gonzalez-Romero, E Goverdovski, A Gramegna, F Griesmayer, E Gunsing, F Haas, B Haight, R Heil, M Herrera-Martinez, A Isaev, S Jericha, E Kappeler, F Kadi, Y Karadimos, D Kerveno, M Ketlerov, V Koehler, P Konovalov, V Krticka, M Lamboudis, C Leeb, H Lindote, A Lopes, I Lorusso, G Lozano, M Lukic, S Marganiec, J Marrone, S Martinez-Val, J Mastinu, P Mengoni, A Milazzo, PM Molina-Coballes, A Moreau, C Mosconi, M Neves, F Oberhummer, H O'Brien, S Pancin, J Papaevangelou, T Paradela, C Pavlik, A Pavlopoulos, P Perlado, JM Perrot, L Pignatari, M Plag, R Plompen, A Plukis, A Poch, A Policarpo, A Pretel, C Quesada, J Rapp, W Rauscher, T Reifarth, R Rosetti, M Rubbia, C Rudolf, G Rullhusen, P Salgado, J Soares, JC Stephan, C Tagliente, G Tain, JL Tassan-Got, L Tavora, L Terlizzi, R Vannini, G Vaz, P Ventura, A Villamarin, D Vincente, MC Vlachoudis, V Voss, F Wendler, H Wiescher, M Wisshak, K AF Abbondanno, U Aerts, G Alvarez-Velarde, F Alvarez-Pol, H Andriamonje, S Andrzejewski, J Badurek, G Baumann, P Becvar, F Benlliure, J Berthoumieux, E Calvino, F Cano-Ott, D Capote, R Cennini, P Chepel, V Chiaveri, E Colonna, N Cortes, G Cortina, D Couture, A Cox, J Dababneh, S Dahlfors, M David, S Dolfini, R Domingo-Pardo, C Duran, I Embid-Segura, M Ferrant, L Ferrari, A Ferreira-Marques, R Frais-Kolbl, H Furman, W Goncalves, I Gallino, R Gonzalez-Romero, E Goverdovski, A Gramegna, F Griesmayer, E Gunsing, F Haas, B Haight, R Heil, M Herrera-Martinez, A Isaev, S Jericha, E Kappeler, F Kadi, Y Karadimos, D Kerveno, M Ketlerov, V Koehler, P Konovalov, V Krticka, M Lamboudis, C Leeb, H Lindote, A Lopes, I Lorusso, G Lozano, M Lukic, S Marganiec, J Marrone, S Martinez-Val, J Mastinu, P Mengoni, A Milazzo, PM Molina-Coballes, A Moreau, C Mosconi, M Neves, F Oberhummer, H O'Brien, S Pancin, J Papaevangelou, T Paradela, C Pavlik, A Pavlopoulos, P Perlado, JM Perrot, L Pignatari, M Plag, R Plompen, A Plukis, A Poch, A Policarpo, A Pretel, C Quesada, J Rapp, W Rauscher, T Reifarth, R Rosetti, M Rubbia, C Rudolf, G Rullhusen, P Salgado, J Soares, JC Stephan, C Tagliente, G Tain, JL Tassan-Got, L Tavora, L Terlizzi, R Vannini, G Vaz, P Ventura, A Villamarin, D Vincente, MC Vlachoudis, V Voss, F Wendler, H Wiescher, M Wisshak, K TI Neutron capture cross section measurements for nuclear astrophysics at CERN n_TOF SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID NUCLEOSYNTHESIS; AGE AB A series of neutron capture cross section measurements of interest to nuclear astrophysics have been recently performed at n-TOF, the neutron spallation source operating at CERN. The low repetition frequency of the proton beam driver, the extremely high instantaneous neutron flux, and the low background conditions in the experimental area are optimal for capture cross section measurements on low-mass or radioactive samples. An overview of the measurements performed during the two experimental campaigns in 2002 and 2003 is presented with special emphasis on the measurement of the capture cross sections of the Os isotopes relevant for the cosmochronology based on the Re/Os clock. C1 Tech Univ, Vienna, Austria. Univ Vienna, Inst Isotopenforsch & Kernphys, Vienna, Austria. Fachhchsch Wiener Neustadt, Neustadt, Germany. CERN, Geneva, Switzerland. IPN, IP2P3, Ctr Natl Rech Sci, Orsay, France. IReS, IP2P3, Ctr Natl Rech Sci, Orsay, France. CEA Saclay, Gif Sur Yvette, France. Univ Ioannina, GR-45110 Ioannina, Greece. Aristotle Univ Thessaloniki, GR-54006 Thessaloniki, Greece. ENEA, Bologna, Italy. Lab Nazl Legnaro, Legnaro, Italy. Ist Nazl Fis Nucl, Bari, Italy. Ist Nazl Fis Nucl, Trieste, Italy. Ist Nazl Fis Nucl, Trieste, Italy. Univ Pavia, I-27100 Pavia, Italy. CEC JRC IRMM, Geel, Belgium. Univ Coimbra, Dept Fis, Coimbra, Portugal. Frank Lab Neutron Phys, Joint Inst Nucl Res, Dubna, Russia. Inst Phys & Power Engn, Obninsk, Russia. Ctr Invest Energet Medioambientales & Technol, Madrid, Spain. Univ Valencia, Consejo Super Invest Cientificas, E-46003 Valencia, Spain. Univ Politecn, Madrid, Spain. Univ Sevilla, Seville, Spain. Univ Santiago Compostela, Santiago De Compostela, Spain. Univ Politecn Catalunya, Barcelona, Spain. Univ Basel, Dept Phys & Astron, Basel, Switzerland. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Notre Dame, Notre Dame, IN 46556 USA. Inst Tecnol & Nucl, Lisbon, Portugal. Charles Univ, Prague, Czech Republic. Ctr Natl Rech Sci, Bordeaux, France. Univ Lodz, PL-90131 Lodz, Poland. Pole Univ Leonard Vinci, Paris, France. Univ Bologna, Dipartimento Fis, Bologna, Italy. Sez INFN, Bologna, Italy. Univ Turin, Dipartimento Fis Gen, I-10125 Turin, Italy. Sez INFN, I-10125 Turin, Italy. RP Mengoni, A (reprint author), Tech Univ, Vienna, Austria. EM alberto.mengoni@cern.ch RI Martinez-Val, Jose/D-3871-2013; Papaevangelou, Thomas/G-2482-2016; Dababneh, Saed/E-7281-2017; Mengoni, Alberto/I-1497-2012; Gonzalez Romero, Enrique/L-7561-2014; Pretel Sanchez, Carme/L-8287-2014; Capote Noy, Roberto/M-1245-2014; Duran, Ignacio/H-7254-2015; Alvarez Pol, Hector/F-1930-2011; Cortina-Gil, Dolores/H-9626-2015; Paradela, Carlos/J-1492-2012; Gramegna, Fabiana/B-1377-2012; Calvino, Francisco/K-5743-2014; Benlliure, Jose/K-8407-2014; Rauscher, Thomas/D-2086-2009; Jericha, Erwin/A-4094-2011; Ventura, Alberto/B-9584-2011; Lindote, Alexandre/H-4437-2013; Neves, Francisco/H-4744-2013; Vaz, Pedro/K-2464-2013; Lopes, Isabel/A-1806-2014; Cortes, Guillem/B-6869-2014; Tain, Jose L./K-2492-2014; Cano Ott, Daniel/K-4945-2014; Quesada Molina, Jose Manuel/K-5267-2014; OI Martinez-Val, Jose/0000-0002-6325-6981; Papaevangelou, Thomas/0000-0003-2829-9158; Dababneh, Saed/0000-0002-7376-1084; Mengoni, Alberto/0000-0002-2537-0038; Pavlik, Andreas/0000-0001-7526-3372; Goncalves, Isabel/0000-0002-1997-955X; Paradela Dobarro, Carlos/0000-0003-0175-8334; Gonzalez Romero, Enrique/0000-0003-2376-8920; Capote Noy, Roberto/0000-0002-1799-3438; Alvarez Pol, Hector/0000-0001-9643-6252; Cortina-Gil, Dolores/0000-0001-7672-9912; Gramegna, Fabiana/0000-0001-6112-0602; Calvino, Francisco/0000-0002-7198-4639; Benlliure, Jose/0000-0002-5114-1298; Rauscher, Thomas/0000-0002-1266-0642; Jericha, Erwin/0000-0002-8663-0526; Ventura, Alberto/0000-0001-6748-7931; Lindote, Alexandre/0000-0002-7965-807X; Neves, Francisco/0000-0003-3635-1083; Vaz, Pedro/0000-0002-7186-2359; Lopes, Isabel/0000-0003-0419-903X; Cano Ott, Daniel/0000-0002-9568-7508; Quesada Molina, Jose Manuel/0000-0002-2038-2814; Marques, Rui/0000-0003-3549-8198; Chepel, Vitaly/0000-0003-0675-4586; Lozano Leyva, Manuel Luis/0000-0003-2853-4103; Koehler, Paul/0000-0002-6717-0771; Domingo-Pardo, Cesar/0000-0002-2915-5466; Pignatari, Marco/0000-0002-9048-6010 NR 7 TC 4 Z9 4 U1 1 U2 9 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 JUL 25 PY 2005 VL 758 SI SI BP 501C EP 504C DI 10.1016/j.nuclphysa.2005.05.180 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500107 ER PT J AU Heil, M Dababneh, S Kappeler, F Plag, R Juseviciute, A Winckler, N Reifarth, R O'Brien, S AF Heil, M Dababneh, S Kappeler, F Plag, R Juseviciute, A Winckler, N Reifarth, R O'Brien, S TI A neutron source to measure stellar neutron capture cross sections at kT=5 keV SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID S-PROCESS; NUCLEOSYNTHESIS AB Since 1980 the Li-7(p,n)(7) Be reaction was intensively used for activation measurements. With a proton energy of E-p= 1911 keV the resulting neutron spectrum resembles a Maxwell-Boltzmann distribution with a thermal energy of kT=25 keV. Therefore, this neutron source is ideal to determine Maxwellian-averaged neutron capture cross sections (MACS) close to a temperature of 250 million Kelvin (kT=23 keV) which is typical for the 8 process in red giant stars. Meanwhile, detailed stellar models indicate that the dominant neutron exposure of the main s-process component in low mass AGB stars occurs at a lower temperature of 90 million Kelvin (kT=8 keV). Hence, the necessary stellar reaction rates had to be extrapolated from 25 keV to the lower thermal energy. In order to avoid the corresponding additional uncertainties, we report on the O-18(p,n)F-18 neutron source, which allows one to produce a Maxwell-Boltzmann spectrum close to the lower thermal energy of kT=8 keV. First results of activation measurements for Ba-138(n,gamma) Ba-139, La-139(n,gamma)La-140, and Lu-175(n,gamma) Lu-176(m) will be presented. C1 Forschungszentrum Karlsruhe, Inst Kernphys, D-76021 Karlsruhe, Germany. Los Alamos Natl Lab, Los Angeles, NM 87545 USA. Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. RP Heil, M (reprint author), Forschungszentrum Karlsruhe, Inst Kernphys, Postfach 3640, D-76021 Karlsruhe, Germany. EM michael.heil@ik.fzk.de RI Dababneh, Saed/E-7281-2017 OI Dababneh, Saed/0000-0002-7376-1084 NR 8 TC 2 Z9 2 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 JUL 25 PY 2005 VL 758 SI SI BP 529C EP 532C DI 10.1016/j.nuclphysa.2005.05.183 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500114 ER PT J AU Marrone, S Abbondanno, U Aerts, G Alvarez-Velarde, F Alvarez-Pol, H Andriamonje, S Andrzejewski, J Badurek, C Baumann, P Becvar, F Benlliure, J Berthoumieux, E Calvino, F Cano-Ott, D Capote, R Cennini, P Chepel, V Chiaveri, E Colonna, N Cortes, G Cortina, D Couture, A Cox, J Dababneh, S Dahlfors, M David, S Dolfini, R Domingo-Pardo, C Duran, I Embid-Segura, M Ferrant, L Ferrari, A Ferreira-Marques, R Frais-Koelbl, H Furman, W Goncalves, I Gallino, R Gonzalez-Romero, E Goverdovski, A Gramegna, F Griesmayer, E Gunsing, F Haas, B Haight, R Heil, M Herrera-Martinez, A Isaev, S Jericha, E Kappeler, F Kadi, Y Karadimos, D Kerveno, M Ketlerov, V Koehler, P Konovalov, V Krticka, M Lamboudis, C Leeb, H Lindote, A Lopes, I Lozano, M Lukic, S Marganiec, J Martinez-Val, J Mastinu, P Mengoni, A Milazzo, PM Molina-Coballes, A Moreau, C Mosconi, M Neves, F Oberhummer, H O'Brien, S Pancin, J Papaevangelou, T Paradela, C Pavlik, A Pavlopoulos, P Perlado, JM Perrot, L Pignatari, M Plag, R Plompen, A Plukis, A Poch, A Policarpo, A Pretel, C Quesada, J Raman, S Rapp, W Rauscher, T Reifarth, R Rosetti, M Rubbia, C Rudolf, G Rullhusen, P Salgado, J Soares, JC Stephan, C Tagliente, G Tain, JL Tassan-Got, L Tavora, L Terlizzi, R Vannini, G Vaz, P Ventura, A Villamarin, D Vincente, MC Vlachoudis, V Voss, F Wendler, H Wiescher, M Wisshak, K AF Marrone, S Abbondanno, U Aerts, G Alvarez-Velarde, F Alvarez-Pol, H Andriamonje, S Andrzejewski, J Badurek, C Baumann, P Becvar, F Benlliure, J Berthoumieux, E Calvino, F Cano-Ott, D Capote, R Cennini, P Chepel, V Chiaveri, E Colonna, N Cortes, G Cortina, D Couture, A Cox, J Dababneh, S Dahlfors, M David, S Dolfini, R Domingo-Pardo, C Duran, I Embid-Segura, M Ferrant, L Ferrari, A Ferreira-Marques, R Frais-Koelbl, H Furman, W Goncalves, I Gallino, R Gonzalez-Romero, E Goverdovski, A Gramegna, F Griesmayer, E Gunsing, F Haas, B Haight, R Heil, M Herrera-Martinez, A Isaev, S Jericha, E Kappeler, F Kadi, Y Karadimos, D Kerveno, M Ketlerov, V Koehler, P Konovalov, V Krticka, M Lamboudis, C Leeb, H Lindote, A Lopes, I Lozano, M Lukic, S Marganiec, J Martinez-Val, J Mastinu, P Mengoni, A Milazzo, PM Molina-Coballes, A Moreau, C Mosconi, M Neves, F Oberhummer, H O'Brien, S Pancin, J Papaevangelou, T Paradela, C Pavlik, A Pavlopoulos, P Perlado, JM Perrot, L Pignatari, M Plag, R Plompen, A Plukis, A Poch, A Policarpo, A Pretel, C Quesada, J Raman, S Rapp, W Rauscher, T Reifarth, R Rosetti, M Rubbia, C Rudolf, G Rullhusen, P Salgado, J Soares, JC Stephan, C Tagliente, G Tain, JL Tassan-Got, L Tavora, L Terlizzi, R Vannini, G Vaz, P Ventura, A Villamarin, D Vincente, MC Vlachoudis, V Voss, F Wendler, H Wiescher, M Wisshak, K TI Measurement of the Sm-151(n,gamma)Sm-152 cross section at n_TOF SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID S-PROCESS; NEUTRON-CAPTURE; NUCLEOSYNTHESIS AB The Sm-151(n,gamma) Sm-152 cross section, which is important for the interpretation of the Sm-151 branching as an s-process thermometer, was measured from 1 eV up to 1 MeV at the innovative n-TOF facility at CERN. Based on these data, the Maxwellian-averaged cross section at kT=30 keV is found to be 3100 +/- 160 nib. This value can be used to constrain the thermodynamical conditions in Asymptotic Giant Branch (AGB) stars during He-shell burning. C1 Tech Univ Vienna, Atom Inst Osterreich, A-1060 Vienna, Austria. Univ Vienna, Inst Isotopenforsch & Kernphys, Vienna, Austria. Fachsch Wiener Neustadt, Wiener Neustadt, Austria. CERN, Geneva, Switzerland. CNRS, IN2P3, IPN, F-91405 Orsay, France. CNRS, IN2P3, IReS, Strasbourg, France. CEA Saclay, DSM, F-91191 Gif Sur Yvette, France. Forschungszentrum Karlsruhe GmbH, Inst Kernphys, Karlsruhe, Germany. Univ Ioannina, GR-45110 Ioannina, Greece. Aristotle Univ Thessaloniki, GR-54006 Thessaloniki, Greece. ENEA, Bologna, Italy. Lab Nazl Legnaro, I-35020 Legnaro, Italy. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Ist Nazl Fis Nucl, Trieste, Italy. Univ Pavia, I-27100 Pavia, Italy. CEC, JRC, IRMM, Geel, Belgium. Univ Coimbra, LIP Coimbra, Coimbra, Portugal. Univ Coimbra, Dept Fis, Coimbra, Portugal. Joint Nucl Res Inst, Frank Lab Neutron Phys, Dubna 141980, Russia. Inst Phys & Power Engn, Obninsk, Russia. Ctr Invest Energet Medioambientales & Tecnol, Madrid, Spain. Univ Valencia, Consejo Super Invest Cientif, Valencia, Spain. Univ Politecn Madrid, Madrid, Spain. Univ Sevilla, Seville, Spain. Univ Santiago de Compostela, Santiago De Compostela, Spain. Univ Politecn Catalunya, Barcelona, Spain. Univ Basel, Dept Phys & Astron, Basel, Switzerland. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. Univ Notre Dame, Notre Dame, IN 46556 USA. Inst Tecnol & Nucl, Lisbon, Portugal. Charles Univ, Prague, Czech Republic. CNRS, IN2P3, CENBG, F-33077 Bordeaux, France. Univ Lodz, PL-90131 Lodz, Poland. Pole Univ Leonard de Vinci, Paris, France. Univ Bologna, Dipartimento Fis, Bologna, Italy. Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy. Univ Turin, Dipartimento Fis Gen, I-10125 Turin, Italy. Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy. RP Perlado, JM (reprint author), Tech Univ Vienna, Atom Inst Osterreich, A-1060 Vienna, Austria. EM stefano.marrone@ba.infn.it RI Gonzalez Romero, Enrique/L-7561-2014; Pretel Sanchez, Carme/L-8287-2014; Capote Noy, Roberto/M-1245-2014; Duran, Ignacio/H-7254-2015; Alvarez Pol, Hector/F-1930-2011; Cortina-Gil, Dolores/H-9626-2015; Paradela, Carlos/J-1492-2012; Gramegna, Fabiana/B-1377-2012; Papaevangelou, Thomas/G-2482-2016; Calvino, Francisco/K-5743-2014; Benlliure, Jose/K-8407-2014; Neves, Francisco/H-4744-2013; Vaz, Pedro/K-2464-2013; Lopes, Isabel/A-1806-2014; Tain, Jose L./K-2492-2014; Cano Ott, Daniel/K-4945-2014; Rauscher, Thomas/D-2086-2009; Jericha, Erwin/A-4094-2011; Quesada Molina, Jose Manuel/K-5267-2014; Ventura, Alberto/B-9584-2011; Martinez-Val, Jose/D-3871-2013; Lindote, Alexandre/H-4437-2013; Dababneh, Saed/E-7281-2017; Mengoni, Alberto/I-1497-2012; OI Gonzalez Romero, Enrique/0000-0003-2376-8920; Capote Noy, Roberto/0000-0002-1799-3438; Alvarez Pol, Hector/0000-0001-9643-6252; Cortina-Gil, Dolores/0000-0001-7672-9912; Gramegna, Fabiana/0000-0001-6112-0602; Papaevangelou, Thomas/0000-0003-2829-9158; Calvino, Francisco/0000-0002-7198-4639; Benlliure, Jose/0000-0002-5114-1298; Neves, Francisco/0000-0003-3635-1083; Vaz, Pedro/0000-0002-7186-2359; Lopes, Isabel/0000-0003-0419-903X; Cano Ott, Daniel/0000-0002-9568-7508; Rauscher, Thomas/0000-0002-1266-0642; Jericha, Erwin/0000-0002-8663-0526; Quesada Molina, Jose Manuel/0000-0002-2038-2814; Ventura, Alberto/0000-0001-6748-7931; Martinez-Val, Jose/0000-0002-6325-6981; Lindote, Alexandre/0000-0002-7965-807X; Dababneh, Saed/0000-0002-7376-1084; Mengoni, Alberto/0000-0002-2537-0038; Pavlik, Andreas/0000-0001-7526-3372; Goncalves, Isabel/0000-0002-1997-955X; Chepel, Vitaly/0000-0003-0675-4586; Lozano Leyva, Manuel Luis/0000-0003-2853-4103 NR 8 TC 4 Z9 4 U1 1 U2 6 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 JUL 25 PY 2005 VL 758 SI SI BP 533C EP 536C DI 10.1016/j.nuclphysa.2005.05.096 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500115 ER PT J AU Tagliente, C Abbondanno, U Aerts, G Alvarez-Velarde, F Alvarez-Pol, H Andriamonje, S Andrzejewski, J Badurek, G Baumann, P Becvar, F Benlliure, J Berthoumieux, E Calvino, F Cano-Ott, D Capote, R Cennini, P Chepel, V Chiaveri, E Colonna, N Cortes, G Cortina, D Couture, A Cox, J Dababneh, S Dahlfors, M David, S Dolfini, R Domingo-Pardo, C Duran, I Embid-Segura, M Ferrant, L Ferrari, A Ferreira-Marques, R Frais-Koelb, H Furman, W Goncalves, I Gallino, R Gonzalez-Romero, E Goverdovski, A Gramegna, F Griesmayer, E Gunsing, F Haas, B Haight, R Heil, M Herrera-Martinez, A Isaev, S Jericha, E Kappeler, F Kadi, Y Karadimos, D Kerveno, M Ketlerov, V Koehler, P Konovalov, V Krticka, M Lamboudis, C Leeb, H Lindote, A Lopes, I Lorusso, G Lozano, M Lukic, S Marganiec, J Marrone, S Martinez-Val'u, J Mastinu, P Mengoni, A Milazzo, PM Molina-Coballes, A Moreau, C Mosconi, M Neves, F Oberhummer, H O'Brien, S Pancin, J Papaevangelou, T Paradela, C Pavlik, A Pavlopoulos, P Perlado, JM Perrot, L Pignatari, M Plag, R Plompen, A Plukis, A Poch, A Policarpo, A Pretel, C Quesada, J Rapp, W Rauscher, T Reifarth, R Rosetti, M Rubbia, C Rudolf, G Rullhusen, P Salgado, J Soares, JC Stephan, C Tain, JL Tassan-Got, L Tavora, L Terlizzi, R Vannini, C Vaz, P Ventura, A Villamarin, D Vincente, MC Vlachoudis, V Voss, F Wandler, H Wiescher, M Wisshak, K AF Tagliente, C Abbondanno, U Aerts, G Alvarez-Velarde, F Alvarez-Pol, H Andriamonje, S Andrzejewski, J Badurek, G Baumann, P Becvar, F Benlliure, J Berthoumieux, E Calvino, F Cano-Ott, D Capote, R Cennini, P Chepel, V Chiaveri, E Colonna, N Cortes, G Cortina, D Couture, A Cox, J Dababneh, S Dahlfors, M David, S Dolfini, R Domingo-Pardo, C Duran, I Embid-Segura, M Ferrant, L Ferrari, A Ferreira-Marques, R Frais-Koelb, H Furman, W Goncalves, I Gallino, R Gonzalez-Romero, E Goverdovski, A Gramegna, F Griesmayer, E Gunsing, F Haas, B Haight, R Heil, M Herrera-Martinez, A Isaev, S Jericha, E Kappeler, F Kadi, Y Karadimos, D Kerveno, M Ketlerov, V Koehler, P Konovalov, V Krticka, M Lamboudis, C Leeb, H Lindote, A Lopes, I Lorusso, G Lozano, M Lukic, S Marganiec, J Marrone, S Martinez-Val'u, J Mastinu, P Mengoni, A Milazzo, PM Molina-Coballes, A Moreau, C Mosconi, M Neves, F Oberhummer, H O'Brien, S Pancin, J Papaevangelou, T Paradela, C Pavlik, A Pavlopoulos, P Perlado, JM Perrot, L Pignatari, M Plag, R Plompen, A Plukis, A Poch, A Policarpo, A Pretel, C Quesada, J Rapp, W Rauscher, T Reifarth, R Rosetti, M Rubbia, C Rudolf, G Rullhusen, P Salgado, J Soares, JC Stephan, C Tain, JL Tassan-Got, L Tavora, L Terlizzi, R Vannini, C Vaz, P Ventura, A Villamarin, D Vincente, MC Vlachoudis, V Voss, F Wandler, H Wiescher, M Wisshak, K CA n TOF Collaborat TI Measurements of the 90,91,92,94,96Zr(n, gamma) cross-sections at n_TOF SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nuclei in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA AB Neutron capture cross sections of the 90,91,91,94,96Zr have been measured over the energy range from 1 eV to 1 MeV at the spallation neutron facility n-TOF at CERN in 2003. The innovative features of the neutron beam, in particular the high instantaneous flux, the high energy resolution and low background, together with improvements of the neutron sensitivity of the capture detectors make this facility unique for neutron-induced reaction cross section measurements with much improved accuracy. The preliminary results of the Zr measurements show capture resonance strengths generally smaller than in previous measurements. C1 Ist Nazl Fis Nucl, I-70126 Bari, Italy. Ist Nazl Fis Nucl, Trieste, Italy. CEA Saclay, DSM, F-91191 Gif Sur Yvette, France. Ctr Invest Energet Medioambientales & Tehcnol, Madrid, Spain. Univ Santiago de Compostela, Santiago De Compostela, Spain. Univ Lodz, PL-90131 Lodz, Poland. Vienna Univ Technol, Atominst Osterreich, A-1060 Vienna, Austria. IN2P3, CNRS, IReS, Strasbourg, France. Charles Univ Prague, Prague, Czech Republic. Univ Politecn Cataluna, Barcelona, Spain. Univ Seville, Seville, Spain. CERN, Geneva, Switzerland. Univ Coimbra, LIP, Coimbra, Portugal. Univ Coimbra, Dept Fis, Coimbra, Portugal. Univ Notre Dame, Notre Dame, IN 46556 USA. Forschungszentrum Karlsruhe, Karlsruhe, Germany. CNRS, IN2P3, IPN, Orsay, France. Univ Pavia, I-27100 Pavia, Italy. Univ Valencia, CSIC, Valencia, Spain. Fachsch Wiener Neustadt, Wiener Neustadt, Austria. Frank Lab Neutron Phys, Joint Inst Nucl Res, Dubna, Russia. Inst Tecnol & Nucl, Lisbon, Portugal. Univ Turin, Dipartimento Fis Gen, I-10125 Turin, Italy. Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy. Obninsk Phys & Power Engn Inst, Obninsk 249020, Russia. Lab Nazl Legnaro, I-35020 Legnaro, Italy. CNRS, IN2P3, CENBG, F-33077 Bordeaux, France. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Ioannina, GR-45110 Ioannina, Greece. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN USA. Aristotle Univ Thessaloniki, GR-54006 Thessaloniki, Greece. Univ Politecn Madrid, Madrid, Spain. Univ Vienna, Inst Isotopenforsch & Kernphys, Vienna, Austria. Pole Univ Leonard de Vinci, Paris, France. CEC, JRC, IRMM, Geel, Belgium. Univ Basel, Dept Phys & Astron, Basel, Switzerland. ENEA, Bologna, Italy. Univ Bologna, Dipartimento Fis, Bologna, Italy. Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy. RP Ist Nazl Fis Nucl, I-70126 Bari, Italy. EM giuseppe.tagliente@ba.infn.it RI Gonzalez Romero, Enrique/L-7561-2014; Pretel Sanchez, Carme/L-8287-2014; Rauscher, Thomas/D-2086-2009; Jericha, Erwin/A-4094-2011; Ventura, Alberto/B-9584-2011; Lindote, Alexandre/H-4437-2013; Neves, Francisco/H-4744-2013; Vaz, Pedro/K-2464-2013; Lopes, Isabel/A-1806-2014; Tain, Jose L./K-2492-2014; Cano Ott, Daniel/K-4945-2014; Quesada Molina, Jose Manuel/K-5267-2014; Mengoni, Alberto/I-1497-2012; Capote Noy, Roberto/M-1245-2014; Duran, Ignacio/H-7254-2015; Alvarez Pol, Hector/F-1930-2011; Cortina-Gil, Dolores/H-9626-2015; Paradela, Carlos/J-1492-2012; Gramegna, Fabiana/B-1377-2012; Papaevangelou, Thomas/G-2482-2016; Calvino, Francisco/K-5743-2014; Benlliure, Jose/K-8407-2014; Martinez-Val, Jose/D-3871-2013; Dababneh, Saed/E-7281-2017 OI Gonzalez Romero, Enrique/0000-0003-2376-8920; Rauscher, Thomas/0000-0002-1266-0642; Jericha, Erwin/0000-0002-8663-0526; Ventura, Alberto/0000-0001-6748-7931; Lindote, Alexandre/0000-0002-7965-807X; Neves, Francisco/0000-0003-3635-1083; Vaz, Pedro/0000-0002-7186-2359; Lopes, Isabel/0000-0003-0419-903X; Cano Ott, Daniel/0000-0002-9568-7508; Quesada Molina, Jose Manuel/0000-0002-2038-2814; Mengoni, Alberto/0000-0002-2537-0038; Pavlik, Andreas/0000-0001-7526-3372; Goncalves, Isabel/0000-0002-1997-955X; Chepel, Vitaly/0000-0003-0675-4586; Lozano Leyva, Manuel Luis/0000-0003-2853-4103; Capote Noy, Roberto/0000-0002-1799-3438; Alvarez Pol, Hector/0000-0001-9643-6252; Cortina-Gil, Dolores/0000-0001-7672-9912; Gramegna, Fabiana/0000-0001-6112-0602; Papaevangelou, Thomas/0000-0003-2829-9158; Calvino, Francisco/0000-0002-7198-4639; Benlliure, Jose/0000-0002-5114-1298; Martinez-Val, Jose/0000-0002-6325-6981; Dababneh, Saed/0000-0002-7376-1084 NR 11 TC 2 Z9 2 U1 1 U2 9 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 JUL 25 PY 2005 VL 758 SI SI BP 573C EP 576C DI 10.1016/j.nuclphysa.2005.05.184 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500125 ER PT J AU Fryer, CL Hungerford, AL Timmes, FX AF Fryer, CL Hungerford, AL Timmes, FX TI Changing the r-process paradigm SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID PROCESS NUCLEOSYNTHESIS; SUPERNOVA EXPLOSIONS; COLLAPSE; STARS; WINDS AB Supernovae are now known to be far from symmetric. At the very least, rotation and convective instabilities alter the spherically symmetric picture producing asymmetric explosions and leaving behind aspherical neutron stars. These asymmetries may be critical to the mechanism behind supernova explosions. Similarly, asphericities in the core just after the launch of the supernova explosion may well change the yield of r-process nucleosynthesis. Rotation and fallback are two of the major aspherical effects altering the r-process yield. They produce asymmetric winds and can increase the entropy and propogation time of the r-process material. Here review both these processes to show the role they may play in the r-process yields. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Fryer, CL (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 14 TC 0 Z9 0 U1 0 U2 1 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 JUL 25 PY 2005 VL 758 SI SI BP 599C EP 602C DI 10.1016/j.nuclphysa.2005.05.186 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500130 ER PT J AU Montes, F Schatz, H Aprahamian, A Arndt, O Estrade, A Kratz, KL Liddick, SN Mantica, PF Mueller, WF Hosmer, P Morton, AC Ouellette, M Pellegrini, E Pfeiffer, B Reeder, P Santi, P Stolz, A Tomlin, BE Walters, WB Wohr, A AF Montes, F Schatz, H Aprahamian, A Arndt, O Estrade, A Kratz, KL Liddick, SN Mantica, PF Mueller, WF Hosmer, P Morton, AC Ouellette, M Pellegrini, E Pfeiffer, B Reeder, P Santi, P Stolz, A Tomlin, BE Walters, WB Wohr, A TI beta-decay studies close to the N=82 r-process path SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA AB New half-lives for neutron-rich ruthenium, rhodium and palladium isotopes close to the r-process path along the N=82 closed shell have been measured at the National Superconducting Cyclotron Laboratory at Michigan State University. The studied isotopes are close to the critical A=118-126 mass region in the astrophysical r-process, where incorrect nuclear structure development towards the shell closure may have the most pronounced effect on the abundances of elements produced. Neutron-rich nuclei were produced by fragmentation of a 120-MeV per nucleon Xe-136 beam on Be and were separated by the A1900 fragment separator. The nuclei of interest were implanted into a double-sided Si strip detector at the center of the MSU beta counting system. Charge states and fully-stripped isotopes were distinguished by a measurement of the total kinetic energy of each implant. Our measured half-lives will provide first clues on whether our understanding of nuclear structure evolution in this mass region is correct. C1 Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA. Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. Michigan State Univ, Joint Inst Nucl Astrophys, E Lansing, MI 48824 USA. Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. Univ Mainz, Inst Kernchem, D-55128 Mainz, Germany. Michigan State Univ, Virtual Inst Nucl Struct & Astrophys, E Lansing, MI 48824 USA. Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA. RP Montes, F (reprint author), Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA. NR 4 TC 2 Z9 2 U1 1 U2 3 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 JUL 25 PY 2005 VL 758 SI SI BP 643C EP 646C PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500139 ER PT J AU Thomas, JS Bardayan, DW Blackmon, JC Cizewski, JA Fitzgerald, RP Greife, U Gross, CJ Johnson, MS Jones, KL Kozub, RL Liang, JF Livesay, RJ Ma, Z Moazen, BH Nesaraja, CD Shapira, D Smith, MS Visser, DW AF Thomas, JS Bardayan, DW Blackmon, JC Cizewski, JA Fitzgerald, RP Greife, U Gross, CJ Johnson, MS Jones, KL Kozub, RL Liang, JF Livesay, RJ Ma, Z Moazen, BH Nesaraja, CD Shapira, D Smith, MS Visser, DW TI Neutron single-particle states in r-process nuclei near closed shells SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA AB We have begun a program to measure (d,p) reactions on neutron-rich nuclei, probing the single-particle states near the N = 50 and N = 82 closed shells. We have measured the neutron transfer on two N = 50 isotones, Ge-82 and Se-84, at the Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory. We have also performed a test measurement of transfer on Sn-124 to develop the techniques to study the H-2(Sn-130,Sn-132,p)(131,133) Sn reactions. Preliminary results for Se-85 are consistent with 5/2(+) ground state and 1/2(+) first excited state assignments, and the successful measurement of the H-2(Sn-124,p) Sn-125 reaction demonstrates the feasibility to measure the (d,p) reaction with neutron-rich Sn-130,Sn-132 beams. C1 Rutgers State Univ, Dept Phys & Astron, New Brunswick, NJ 08903 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA. Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA. Tennessee Technol Univ, Dept Phys, Cookeville, TN 38505 USA. Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA. RP Thomas, JS (reprint author), Rutgers State Univ, Dept Phys & Astron, New Brunswick, NJ 08903 USA. RI Visser, Dale/A-8117-2009; Jones, Katherine/B-8487-2011; Fitzgerald, Ryan/H-6132-2016 OI Visser, Dale/0000-0002-2891-4731; Jones, Katherine/0000-0001-7335-1379; NR 7 TC 1 Z9 1 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 JUL 25 PY 2005 VL 758 SI SI BP 663C EP 666C PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500144 ER PT J AU Reitzner, SD Boyd, RN LeCompte, TJ Talaga, RL AF Reitzner, SD Boyd, RN LeCompte, TJ Talaga, RL TI Lead based supernova neutrino detectors SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA AB Information on the process of core collapse in supernovae can potentially be found in the neutrinos emitted from such an event. Lead, due to its relatively large cross section for high energy neutrinos, is an ideal detector for supernova neutrinos. Computer simulations axe being used to help design various lead based supernova neutrino detectors. C1 Ohio State Univ, Dept Phys, Columbus, OH 43210 USA. Ohio State Univ, Dept Astron, Columbus, OH 43210 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Reitzner, SD (reprint author), Ohio State Univ, Dept Phys, 174 W 18th Ave, Columbus, OH 43210 USA. NR 8 TC 0 Z9 0 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 JUL 25 PY 2005 VL 758 SI SI BP 701C EP 704C PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500152 ER PT J AU Kubono, S Teranishi, T Notani, M Yamaguchi, H Saito, A He, JJ Wakabayashi, M Fujikawa, H Amadio, G Baba, H Fukuchi, T Shimoura, S Michimasa, S Nishimura, S Nishimura, M Gono, Y Odahara, A Kato, S Moon, JY Lee, JH Lee, CS Kim, JC Hahn, KI Ishikawa, T Hashimoto, T Ishiyama, H Watanabe, YX Tanaka, MH Miyatake, H Fulop, Z Guimaraes, V Lichtenthaler, R AF Kubono, S Teranishi, T Notani, M Yamaguchi, H Saito, A He, JJ Wakabayashi, M Fujikawa, H Amadio, G Baba, H Fukuchi, T Shimoura, S Michimasa, S Nishimura, S Nishimura, M Gono, Y Odahara, A Kato, S Moon, JY Lee, JH Lee, CS Kim, JC Hahn, KI Ishikawa, T Hashimoto, T Ishiyama, H Watanabe, YX Tanaka, MH Miyatake, H Fulop, Z Guimaraes, V Lichtenthaler, R TI Study of stellar reactions in explosive hydrogen burning with CRIB SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID RADIOACTIVE NUCLEAR BEAMS; HOT CNO CYCLE; ASTROPHYSICS; NE-18 AB With using low-energy RI beams from an in-flight RIB separator, CRIB, the most crucial stellar reaction O-14(alpha,p)F-17 for the onset of the high-temperature rp-process was directly investigated and the transitions through the states at around 6.2 MeV in Ne-18 were first observed, confirming the importance predicted before. The (alpha,p) reaction leading to the first excited state in F-17 was also found to have a large contribution. A proton resonance search experiment of Mg-23 + p was also discussed, which is a part of our series of resonance search studies relevant to the early stage of the rp-process. C1 Univ Tokyo, RIKEN, Ctr Nucl Study, Wako Branch, Wako, Saitama 3510198, Japan. Kyushu Univ, Dept Phys, Fukuoka 8128581, Japan. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan. Nishi Nippon Inst Technol, Karita, Fukuoka 8000394, Japan. Yamagata Univ, Dept Phys, Yamagata 9998560, Japan. Chung Ang Univ, Dept Phys, Seoul 156756, South Korea. Seoul Natl Univ, Dept Phys, Seoul 151742, South Korea. Ewha Womans Univ, Dept Sci Educ, Seoul 120750, South Korea. KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki 3050801, Japan. Hungarian Acad Sci, Inst Nucl Res, ATOMKI, H-4001 Debrecen, Hungary. Univ Sao Paulo, Dept Fys Nucl, BR-05508 Sao Paulo, Brazil. RP Kubono, S (reprint author), Univ Tokyo, RIKEN, Ctr Nucl Study, Wako Branch, Hirosawa 2-1, Wako, Saitama 3510198, Japan. RI Fulop, Zsolt/B-2262-2008; Teranishi, Takashi/D-2166-2012; Shimoura, Susumu/E-8692-2012; Lichtenthaler, Rubens/K-7278-2012; Guimaraes, Valdir/B-4958-2014; Amadio, Guilherme/M-3195-2015; Fukuchi, Tomonori/D-3855-2017 OI Shimoura, Susumu/0000-0003-4741-2865; Lichtenthaler, Rubens/0000-0001-8317-2630; Guimaraes, Valdir/0000-0003-3715-0726; Amadio, Guilherme/0000-0002-2102-7945; Fukuchi, Tomonori/0000-0003-3566-9954 NR 12 TC 0 Z9 0 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 JUL 25 PY 2005 VL 758 SI SI BP 733C EP 736C DI 10.1016/j.nuclphysa.2005.05.132 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500159 ER PT J AU Bardayan, DW Blackmon, JC del Campo, JG Kozub, RL Liang, JF Ma, Z Sahin, L Shapira, D Smith, MS AF Bardayan, DW Blackmon, JC del Campo, JG Kozub, RL Liang, JF Ma, Z Sahin, L Shapira, D Smith, MS TI New Ne-19 level observed with a thick target F-18(p,p)F-18 measurement SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nuclei in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID REACTION-RATES; SCATTERING; NOVAE AB The rates of the F-18 (p, alpha)O-15 and F-18(p, gamma)Ne-19 reactions in astrophysical environments depend on the properties of Ne-19 levels above the F-18 + p threshold. There are at least 8 levels in the mirror nucleus F-19 for which analogs have not been observed in Ne-19 in the excitation energy range E-x = 6.4 - 7.6 MeV. These levels may significantly enhance the F-18 + p reaction rates, and thus we have made a search for these levels by measuring the H-1(F-18,p)F-18 excitation function over the energy range E-c.m. = 0.3 - 1.3 MeV. We have identified and measured the properties of a newly observed level at E-x = 7.420 +/- 0.014 MeV. which is most likely the mirror to the J(pi) = (7)/(+)(2) F-19 level at 7.56 MeV. We have additionally found a significant discrepancy with a recent compilation for the properties of a Ne-19 state at E-x = 7.5 MeV and set upper limits on the proton widths of missing levels. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Tennessee Technol Univ, Dept Phys, Cookeville, TN 38505 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA. Dumlupinar Univ, Dept Phys, TR-43100 Kutahya, Turkey. RP Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. NR 17 TC 1 Z9 1 U1 0 U2 1 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 JUL 25 PY 2005 VL 758 SI SI BP 737C EP 740C DI 10.1016/j.nuclphysa.2005.05.133 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500160 ER PT J AU Jenkins, DG Fulton, BR Lister, CJ Janssens, RVF Khoo, TL Moore, EF Rehm, KE Truett, B Wuosmaa, AH Freer, M Jose, J AF Jenkins, DG Fulton, BR Lister, CJ Janssens, RVF Khoo, TL Moore, EF Rehm, KE Truett, B Wuosmaa, AH Freer, M Jose, J TI Reevaluation of the Na-22(p,gamma) reaction rate SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nuclei in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID NA-22; NOVAE AB Understanding the processes which create and destroy Na-22 is important for diagnosing classical nova outbursts. Conventional 22Na(p,gamma) studies are complicated by the need to employ radioactive targets. In contrast, we have formed the particle-unbound states of interest through the heavy-ion fusion reaction, C-12(C-12,n)Mg-23 and used the Gammasphere array to investigate their radiative decay branches. Detailed spectroscopy was possible and the Na-22(p,gamma) reaction rate has been re-evaluated. Hydrodynamical calculations incorporating the revised rate indicate a reduction in the yield of Na-22 by a factor of four from previous estimates implying a reduction by a factor of two for the maximum detectability distance for Na-22 gamma rays from novae. C1 Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Univ Birmingham, Dept Phys, Birmingham B15 2TT, W Midlands, England. UPC, Dept Fis & Engn Nucl, E-08800 Vilanova i la Geltru, Spain. Inst Estudis Espacials Catalunya, E-08034 Barcelona, Spain. RP Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England. RI Freer, Martin/F-9379-2013 NR 14 TC 2 Z9 2 U1 0 U2 1 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 JUL 25 PY 2005 VL 758 SI SI BP 749C EP 752C DI 10.1016/j.nuclphysa.2005.05.134 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500163 ER PT J AU Kozub, RL Bardayan, DW Batchelder, JC Blackmon, JC Brune, CR Champagne, AE Cizewski, JA Davinson, T Greife, U Gross, CJ Jewett, CC Livesay, RJ Ma, Z Moazen, BH Nesaraja, CD Scott, JP Sahin, L Shapira, D Smith, MS Thomas, JS Woods, PJ AF Kozub, RL Bardayan, DW Batchelder, JC Blackmon, JC Brune, CR Champagne, AE Cizewski, JA Davinson, T Greife, U Gross, CJ Jewett, CC Livesay, RJ Ma, Z Moazen, BH Nesaraja, CD Scott, JP Sahin, L Shapira, D Smith, MS Thomas, JS Woods, PJ TI New limits for the F-18(p,alpha)O-15 rate in Novae SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nuclei in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA AB The degree to which the (p, gamma) and (p, alpha) reactions destroy F-18 at temperatures similar to 14x10(8) K is important for understanding the synthesis of nuclei in nova explosions and for using the long-lived radionuclide F-18, a target of gamma ray astronomy, as a diagnostic of nova mechanisms. The reactions are dominated by low-lying proton resonances near the F-18+p threshold (E-x=6.411 MeV in Ne-19). To gain further information about these resonances, we have used the d (F-18,p)F-19 neutron transfer reaction to selectively populate corresponding mirror states in F-19. The results would suggest F-18(p, gamma)Ne-19 and F-18(p, alpha)O-15 reaction rates that are 2-3 times lower than reported previously. C1 Tennessee Technol Univ, Dept Phys, Cookeville, TN 38505 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA. Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA. Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA. Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA. Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland. Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Dumlupinar Univ, Dept Phys, TR-43100 Kutahya, Turkey. RP Tennessee Technol Univ, Dept Phys, Cookeville, TN 38505 USA. OI Nesaraja, Caroline/0000-0001-5571-8341 NR 20 TC 9 Z9 9 U1 0 U2 2 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 JUL 25 PY 2005 VL 758 SI SI BP 753C EP 756C DI 10.1016/j.nuclphysa.2005.05.135 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500164 ER PT J AU Gomi, T Motobayashi, T Ando, Y Aoi, N Baba, H Demichi, K Elekes, Z Fukuda, N Fulop, Z Futakami, U Hasegawa, H Higurashi, Y Ieki, K Imai, N Ishihara, M Ishikawa, K Iwasa, N Iwasaki, H Kanno, S Kondo, Y Kubo, T Kubono, S Kunibu, M Kurita, K Matsuyama, YU Michimasa, S Minemura, T Miura, M Murakami, H Nakamura, T Notani, M Ota, S Saito, A Sakurai, H Serata, M Shimoura, S Sugimoto, T Takeshita, E Takeuchi, S Togano, Y Ue, K Yamada, K Yanagisawa, Y Yoneda, K Yoshida, A AF Gomi, T Motobayashi, T Ando, Y Aoi, N Baba, H Demichi, K Elekes, Z Fukuda, N Fulop, Z Futakami, U Hasegawa, H Higurashi, Y Ieki, K Imai, N Ishihara, M Ishikawa, K Iwasa, N Iwasaki, H Kanno, S Kondo, Y Kubo, T Kubono, S Kunibu, M Kurita, K Matsuyama, YU Michimasa, S Minemura, T Miura, M Murakami, H Nakamura, T Notani, M Ota, S Saito, A Sakurai, H Serata, M Shimoura, S Sugimoto, T Takeshita, E Takeuchi, S Togano, Y Ue, K Yamada, K Yanagisawa, Y Yoneda, K Yoshida, A TI Coulomb dissociation of Al-23 for the stellar Mg-22(p,gamma)Al-23 reaction SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nuclei in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID NOVA OUTBURSTS; WHITE-DWARFS; NUCLEOSYNTHESIS; EMISSION; NA-22; LINE C1 Rikkyo Univ, Dept Phys, Tokyo 1718501, Japan. Hungarian Acad Sci, Inst Nucl Res, ATOMKI, H-4001 Debrecen, Hungary. Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan. Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan. Univ Tokyo, Dept Phys, Tokyo 1130033, Japan. Argonne Natl Lab, Argonne, IL 60439 USA. RI Fulop, Zsolt/B-2262-2008; Shimoura, Susumu/E-8692-2012; Elekes, Zoltan/J-4531-2012; SAKURAI, HIROYOSHI/G-5085-2014; Nakamura, Takashi/N-5390-2015; Takeuchi, Satoshi/O-1529-2016; OI Shimoura, Susumu/0000-0003-4741-2865; Nakamura, Takashi/0000-0002-1838-9363; Elekes, Zoltan/0000-0003-0571-8719 NR 8 TC 15 Z9 15 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 JUL 25 PY 2005 VL 758 SI SI BP 761C EP 764C DI 10.1016/j.nuclphysa.2005.05.137 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500166 ER PT J AU Reifarth, R Heil, M Plag, R Besserer, U Dababneh, S Dorr, L Gorres, J Haight, RC Kappeler, F Mengoni, A O'Brien, S Patronis, N Rundberg, RS Wiescher, M Wilhelmy, JB AF Reifarth, R Heil, M Plag, R Besserer, U Dababneh, S Dorr, L Gorres, J Haight, RC Kappeler, F Mengoni, A O'Brien, S Patronis, N Rundberg, RS Wiescher, M Wilhelmy, JB TI Stellar neutron eapture rates of C-14 SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 8th International Symposium on Nucle in the Cosmos (NIC8) CY JUL 19-23, 2004 CL Vancouver, CANADA ID CROSS-SECTION; ISOTOPES; CAPTURE AB We report on new measurements of the C-14 (n,gamma)C-15 cross section with averaged neutron energies of 30, 150, and 500 keV using the fast cyclic activation technique. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Forschungszentrum Karlsruhe, D-76021 Karlsruhe, Germany. Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. CERN, CH-1211 Geneva, Switzerland. Univ Ioannina, Dept Phys, GR-45110 Ioannina, Greece. RP Dababneh, S (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Patronis, Nikolaos/A-3836-2008; Dababneh, Saed/E-7281-2017; Mengoni, Alberto/I-1497-2012 OI Dababneh, Saed/0000-0002-7376-1084; Mengoni, Alberto/0000-0002-2537-0038 NR 11 TC 13 Z9 13 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 JUL 25 PY 2005 VL 758 SI SI BP 787C EP 790C DI 10.1016/j.nuclphysa.2005.05.141 PG 4 WC Physics, Nuclear SC Physics GA 947QG UT WOS:000230660500172 ER PT J AU Quaranta, V Weaver, AM Cummings, PT Anderson, ARA AF Quaranta, V Weaver, AM Cummings, PT Anderson, ARA TI Mathematical modeling of cancer: The future of prognosis and treatment SO CLINICA CHIMICA ACTA LA English DT Article; Proceedings Paper CT International Conference on Laboratory Medicine CY OCT 29, 2002 CL Padua, ITALY SP Int Soc Enzymol DE mathematical modeling; cancer; invasion; computation; metastasis ID EPITHELIAL-MESENCHYMAL TRANSITION; TUMOR-INDUCED ANGIOGENESIS; SOLID TUMORS; GROWTH; INVASION; SIMULATION; METASTASIS; EXPRESSION; DIFFUSION; MIGRATION AB Background: Cancer research has undergone radical changes in the past few years. Producing information both at the basic and clinical levels is no longer the issue. Rather, how to handle this information has become the major obstacle to progress. Intuitive approaches are no longer feasible. The next big step will be to implement mathematical modeling approaches to interrogate the enormous amount of data being produced and extract useful answers (a "top-down" approach to biology and medicine). Methods: Quantitative simulation of clinically relevant cancer situations-based on experimentally validated mathematical modeling-provides an opportunity for the researcher, and eventually the clinician, to address data and information in the context of well-formulated questions and "what if' scenarios. Results and conclusions: At the Vanderbilt Integrative Cancer Biology Center (VICBC), we are integrating cancer researchers, oncologists, chemical and biological engineers, computational biologists, computer modelers, theoretical and applied mathematicians, and imaging scientists, in order to implement a vision for a combined web site and computational server that will be a home for our mathematical modeling of cancer invasion. The web site (www.vanderbilt.edu/VICBC/) will serve as a portal to our code, which simulates turner growth by calculating the dynamics of individual cancer cells (an experimental "bottom-up" approach to complement the top-down model). Eventually, cancer researchers outside of Vanderbilt will be able to initiate a simulation based on providing individual cell data through a web page. We envision placing the web site and computer cluster directly in the hands of biological researchers involved in data mining and mathematical modeling. Furthermore, the web site will also contain teaching props for a new generation of biomedical researchers fluent in both mathematics and biology. This is unconventional bioinformatics: We will be incorporating biological data and functional information into a unified community-based mathematical framework. The result will be a tool for cancer modeling that will ultimately have basic research, therapeutic and educational value. (c) 2005 Elsevier B.V. All rights reserved. C1 Vanderbilt Univ, Ctr Matrix Biol, Sch Med, Dept Canc Biol, Nashville, TN 37232 USA. Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37232 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN USA. Univ Dundee, Dept Math, Dundee, Scotland. RP Quaranta, V (reprint author), Vanderbilt Univ, Ctr Matrix Biol, Sch Med, Dept Canc Biol, 771 Preston Bldg, Nashville, TN 37232 USA. EM vito.quaranta@vanderbilt.edu RI Anderson, Alexander/A-2713-2011; Quaranta, Vito/G-6512-2016; Cummings, Peter/B-8762-2013 OI Anderson, Alexander/0000-0002-2536-4383; Quaranta, Vito/0000-0001-7491-8672; Cummings, Peter/0000-0002-9766-2216 FU NCI NIH HHS [1 P50 CA113007-01] NR 35 TC 56 Z9 57 U1 2 U2 27 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-8981 J9 CLIN CHIM ACTA JI Clin. Chim. Acta PD JUL 24 PY 2005 VL 357 IS 2 SI SI BP 173 EP 179 DI 10.1016/j.cccn.2005.03.023 PG 7 WC Medical Laboratory Technology SC Medical Laboratory Technology GA 950IN UT WOS:000230850900009 PM 15907826 ER PT J AU St-Jean, M Lafrance-Vanasse, J Liotard, B Sygusch, J AF St-Jean, M Lafrance-Vanasse, J Liotard, B Sygusch, J TI High resolution reaction intermediates of rabbit muscle fructose-1,6-bisphosphate aldolase - Substrate cleavage and induced fit SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID FRUCTOSE 1,6-BISPHOSPHATE ALDOLASE; SCHIFF-BASE FORMATION; CRYSTAL-STRUCTURE; ACTIVE-SITE; MECHANISTIC IMPLICATIONS; CARBINOLAMINE FORMATION; DIPHOSPHATE ALDOLASE; BINDING; COMPLEXES; RESIDUE AB Crystal structures were determined to 1.8 angstrom resolution of the glycolytic enzyme fructose-1,6-bis(phosphate) aldolase trapped in complex with its substrate and a competitive inhibitor, mannitol-1,6-bis(phosphate). The enzyme substrate complex corresponded to the postulated Schiff base intermediate and has reaction geometry consistent with incipient C-3-C-4 bond cleavage catalyzed by Glu-187, which is adjacent to the Schiff base forming Lys-229. Atom arrangement about the cleaved bond in the reaction intermediate mimics a pericyclic transition state occurring in nonenzymatic aldol condensations. Lys-146 hydrogen-bonds the substrate C-4 hydroxyl and assists substrate cleavage by stabilizing the developing negative charge on the C-4 hydroxyl during proton abstraction. Mannitol-1,6-bis(phosphate) forms a noncovalent complex in the active site whose binding geometry mimics the covalent carbinolamine precursor. Glu-187 hydrogen-bonds the C-2 hydroxyl of the inhibitor in the enzyme complex, substantiating a proton transfer role by Glu-187 in catalyzing the conversion of the carbinolamine intermediate to Schiff base. Modeling of the acyclic substrate configuration into the active site shows Glu-187, in acid form, hydrogen-bonding both substrate C-2 carbonyl and C-4 hydroxyl, thereby aligning the substrate ketose for nucleophilic attack by Lys-229. The multifunctional role of Glu-187 epitomizes a canonical mechanistic feature conserved in Schiff base-forming aldolases catalyzing carbohydrate metabolism. Trapping of tagatose-1,6-bis(phosphate), a diastereoisomer of fructose 1,6-bis(phosphate), displayed stereospecific discrimination and reduced ketohexose binding specificity. Each ligand induces homologous conformational changes in two adjacent alpha-helical regions that promote phosphate binding in the active site. C1 Univ Montreal, Dept Biochem, Montreal, PQ H3C 3J7, Canada. Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA. RP Sygusch, J (reprint author), Univ Montreal, Dept Biochem, CP 6128,Stn Ctr Ville, Montreal, PQ H3C 3J7, Canada. EM Jurgen.Sygusch@UMontreal.CA RI Lafrance-Vanasse, Julien/B-1952-2009 NR 47 TC 43 Z9 43 U1 3 U2 10 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 JUL 22 PY 2005 VL 280 IS 29 BP 27262 EP 27270 DI 10.1074/jbc.M502413200 PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 946RI UT WOS:000230589500075 PM 15870069 ER PT J AU Krishnan, VV Lau, EY Tsvetkova, NM Feeney, RE Fink, WH Yeh, Y AF Krishnan, VV Lau, EY Tsvetkova, NM Feeney, RE Fink, WH Yeh, Y TI Characterization of the restricted rotation of the dimethyl groups in chemically N-terminal C-13-labeled antifreeze glycoproteins: A temperature-dependent study in water to ice through the supercooled state SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID STRUCTURAL BIOLOGY; NMR-SPECTROSCOPY; POLAR FISH; MOLECULAR-DYNAMICS; INTERNAL-ROTATION; PROTON-EXCHANGE; PROTEIN NMR; BASE-PAIR; RELAXATION; MECHANISMS AB Site-specific chemical modification, especially with isotopically enriched groups, allows one to study the structure and dynamics of proteins for which uniform enrichment is difficult. When the N-terminal alanine in antifreeze glycoprotein (AFGP) is replaced with an N,N-dimethyl alanine the methyl groups show signatures of slow rotation about the C-N bond. In order to separate the local dynamics of the N-terminus from the overall protein dynamics, we present a complete characterization of this dynamics. Temperature-dependent nuclear magnetic-resonance experiments from room temperature to subzero temperatures, including the supercooled state and in the presence of ice, are presented. Quantum chemical calculations are also performed on a localized N-terminus of the AFGP. Our results show that in the solution state at room temperature and in the super cooled regime, the dimethyl groups undergo a slow, restricted rotation with an unequal distribution of population between two major conformations. At lower temperatures in the presence of ice, the dynamics become much more complex due to freezing out of several conformational states. Based on these results, we conclude that the segmental dynamics of the N-terminus are local to the first residue and do not affect the overall dynamics of the protein. (C) 2005 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Biosci Directorate, Livermore, CA 94551 USA. Univ Calif Davis, Sect Mol & Cellular Biol, Davis, CA 95616 USA. Univ Calif Davis, Dept Food Sci & Technol, Davis, CA 95616 USA. Univ Calif Davis, Dept Chem, Davis, CA 95616 USA. Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. RP Krishnan, VV (reprint author), Lawrence Livermore Natl Lab, Biosci Directorate, Livermore, CA 94551 USA. EM krish@llnl.gov RI Krishnan, Krish/A-6859-2010 FU NHLBI NIH HHS [HL57810-01, HL61204] NR 52 TC 3 Z9 3 U1 1 U2 5 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JUL 22 PY 2005 VL 123 IS 4 AR 044702 DI 10.1063/1.1924549 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 952GK UT WOS:000230991800042 PM 16095379 ER PT J AU Niklasson, AMN Weber, V Challacombe, M AF Niklasson, AMN Weber, V Challacombe, M TI Nonorthogonal density-matrix perturbation theory SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ELECTRONIC-STRUCTURE CALCULATIONS; CONSISTENT-FIELD THEORY; LINEAR SCALING COMPUTATION; BINDING MOLECULAR-DYNAMICS; AB-INITIO CALCULATIONS; SYSTEM-SIZE; TIGHT-BINDING; FUNCTIONAL CALCULATIONS; LOCALIZED ORBITALS; FOCK MATRIX AB Recursive density-matrix perturbation theory [A.M.N. Niklasson and M. Challacombe, Phys. Rev. Lett. 92, 193001 (2004)] provides an efficient framework for the linear scaling computation of materials response properties [V. Weber, A.M.N. Niklasson, and M. Challacombe, Phys. Rev. Lett. 92, 193002 (2004)]. In this article, we generalize the density-matrix perturbation theory to include properties computed with a perturbation-dependent nonorthogonal basis. Such properties include analytic derivatives of the energy with respect to nuclear displacement, as well as magnetic response computed with a field-dependent basis. The theory is developed in the context of linear scaling purification methods, which are briefly reviewed. (C) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Fribourg, Dept Chem, CH-1700 Fribourg, Switzerland. RP Niklasson, AMN (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM amn@lanl.gov NR 69 TC 17 Z9 17 U1 0 U2 8 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JUL 22 PY 2005 VL 123 IS 4 AR 044107 DI 10.1063/1.1944725 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 952GK UT WOS:000230991800009 PM 16095346 ER PT J AU Weber, V Niklasson, AMN Challacombe, M AF Weber, V Niklasson, AMN Challacombe, M TI Higher-order response in O(N) by perturbed projection SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ELECTRONIC-STRUCTURE CALCULATIONS; DENSITY-FUNCTIONAL THEORY; NONLINEAR OPTICAL-PROPERTIES; LINEAR SCALING COMPUTATION; CONVERGENCE ACCELERATION; HARTREE-FOCK; TIGHT-BINDING; MATRIX; IMPLEMENTATION; PURIFICATION AB Perturbed projection for linear scaling solution of the coupled-perturbed self-consistent-field equations [V. Weber, A.M.N. Niklasson, and M. Challacombe, Phys. Rev. Lett. 92, 193002 (2004)] is extended to the computation of higher-order static response properties. Although generally applicable, perturbed projection is further developed here in the context of the self-consistent first and second electric hyperpolarizabilities at the Hartree-Fock level of theory. Nonorthogonal, density-matrix analogs of Wigner's 2n+1 rule valid for linear one-electron perturbations are given up to fourth order. Linear scaling and locality of the higher-order response densities under perturbation by a global electric field are demonstrated for three-dimensional water clusters. (C) 2005 American Institute of Physics. C1 Univ Fribourg, Dept Chem, CH-1700 Fribourg, Switzerland. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Weber, V (reprint author), Univ Fribourg, Dept Chem, CH-1700 Fribourg, Switzerland. EM valery.weber@unifr.ch; mchalla@lanl.gov NR 56 TC 16 Z9 16 U1 0 U2 5 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JUL 22 PY 2005 VL 123 IS 4 AR 044106 DI 10.1063/1.1944724 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 952GK UT WOS:000230991800008 PM 16095345 ER PT J AU McFarlane, SA Marchand, RT Ackerman, TP AF McFarlane, SA Marchand, RT Ackerman, TP TI Retrieval of cloud phase and crystal habit from Multiangle Imaging Spectroradiometer ( MISR) and Moderate Resolution Imaging Spectroradiometer ( MODIS) data SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID MICROPHYSICAL PROPERTIES; TROPICAL CIRRUS; DOPPLER RADAR; ICE CRYSTALS; MODELS; SIZE; PARAMETERIZATION; INSTRUMENT; SHAPES; SCHEME AB A method of retrieving cloud phase and the dominant ice crystal habit from radiances measured by the Multiangle Imaging Spectroradiometer (MISR) and the Moderate Resolution Imaging Spectroradiometer (MODIS) has been developed. The retrieval method takes advantage of the differences in the phase function of various particle shapes as a function of scattering angle. Three case studies are presented which illustrate the retrieval method. A comparison with semi-coincident in situ observations for one case study indicates that the retrieved crystal habits are consistent with the observations. C1 Pacific NW Natl Lab, Climate Phys Grp, Richland, WA 99352 USA. RP McFarlane, SA (reprint author), Pacific NW Natl Lab, Climate Phys Grp, POB 999,MS K9-24, Richland, WA 99352 USA. EM sally.mcfarlane@pnl.gov RI McFarlane, Sally/C-3944-2008 NR 22 TC 11 Z9 11 U1 0 U2 3 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-897X EI 2169-8996 J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD JUL 22 PY 2005 VL 110 IS D14 AR D14201 DI 10.1029/2004JD004831 PG 11 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 951GS UT WOS:000230918100001 ER PT J AU Denton, MH Thomsen, MF Korth, H Lynch, S Zhang, JC Liemohn, MW AF Denton, MH Thomsen, MF Korth, H Lynch, S Zhang, JC Liemohn, MW TI Bulk plasma properties at geosynchronous orbit SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID RING CURRENT; ION COMPOSITION; MAGNETOSPHERIC PLASMA; SHEET ACCESS; GEOTAIL OBSERVATIONS; SUBSTORM INJECTIONS; INNER MAGNETOSPHERE; MAGNETIC STORM; SOLAR-ACTIVITY; LONG-TERM AB [1] We present a comprehensive study of plasma properties at geosynchronous orbit for electron and ion energies between similar to 1 eV and similar to 45 keV, between 1990 and 2001. The variations of temperature and density are analyzed as functions of local time, magnetospheric convection strength, and the strength of the ring current. Various parameters derived from temperature and density are calculated to elucidate the temporal and spatial location of delivery of plasma sheet material into the inner magnetosphere. We find that the electron and proton densities are greatest in the dawn region for the periods of highest convection and ring current strength. We perform a superposed epoch analysis of 283 geomagnetic storms which occurred between 1991 and 2001 and examine the temporal variation of the plasma at geosynchronous orbit as a function of storm phase. This analysis demonstrates the local time variability of delivery from the plasma sheet into the inner magnetosphere and the concurrent changes in temperature and pressure. We demonstrate that the density of electrons in the plasma sheet is strongly dependent upon the magnetospheric convection strength and, for the first time, upon solar activity. Electron density at geosynchronous orbit is strongly correlated with solar activity. The average plasma sheet electron density at solar maximum can be a factor of two or more higher than that at solar minimum. We also outline a method to estimate the composition of the plasma sheet from MPA measurements and calculate the O+ and H+ density variations with solar cycle as a function of Kp and local time. We show that the O+ and H+ plasma sheet densities increase with increasing solar activity, as does the O+/ H+ density ratio. During times of high solar activity and strong convection, the O+ and H+ densities may be comparable. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Johns Hopkins Univ, Appl Phys Lab, Space Phys Grp, Laurel, MD 20723 USA. Univ Calif San Diego, Scripps Inst Oceanog, Marine Phys Lab, La Jolla, CA 92093 USA. Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA. RP Denton, MH (reprint author), Los Alamos Natl Lab, ISR-1,POB 1633,MS D466, Los Alamos, NM 87545 USA. EM mhdenton@lanl.gov; mthomsen@lanl.gov; haje.korth@jhuapl.edu; slynch@mpl.ucsd.edu; jichunz@engin.umich.edu; liemohn@umich.edu RI Zhang, Jichun/A-4586-2008; Zhang, Jichun/A-6648-2009; Liemohn, Michael/H-8703-2012; OI Liemohn, Michael/0000-0002-7039-2631; Denton, Michael/0000-0002-1748-3710 NR 38 TC 86 Z9 87 U1 0 U2 3 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD JUL 22 PY 2005 VL 110 IS A7 AR A07223 DI 10.1029/2004JA010861 PG 17 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 951HT UT WOS:000230920900006 ER PT J AU Sessler, JL Cho, WS Gross, DE Shriver, JA Lynch, VM Marquez, M AF Sessler, JL Cho, WS Gross, DE Shriver, JA Lynch, VM Marquez, M TI Anion binding studies of fluorinated expanded calixpyrroles SO JOURNAL OF ORGANIC CHEMISTRY LA English DT Article ID HOST-GUEST CHEMISTRY; CALIX<6> PYRROLE; EXTENDED-CAVITY; HYBRID; CALIX<4>PYRROLES; RECOGNITION; RECEPTORS AB The anion binding properties of fluorinated calix[n]pyrroles (n = 4-6) in aprotic solvents (acetonitrile and DMSO) and modified reaction conditions allowing for the synthesis and isolation of the hitherto missing dodecafluorocalix[6]pyrrole from the condensation of 3,4-difluoro-1H-pyrrole and acetone are described. In acetonitrile solution containing 2% water, the association constants for the 1:1 binding interaction between octafluorocalix[4]pyrrole and chloride anion obtained with isothermal titration calorimetry (ITC) and H-1 NMR titration methods were found to match reasonably well. As compared to its nonfluorinated congener, octafluorocalix[4]pyrrole was found to display enhanced binding affinities for several representative anions in pure acetonitrile as judged from ITC analyses. Similar analyses of the fluorinated calix[n]pyrroles revealed an increase in the relative affinity for bromide over chloride with increasing macrocycle size, as manifest in a decrease in the binding ratio Ka((Cl))/K-a(Br). Anion binding studies in the solid state, involving single-crystal X-ray diffraction analyses of the chloride and acetate anion complexes of octafluorocalix[4]pyrrole and decafluorocalix[5]pyrrole, respectively, confirmed the expected hydrogen bond interactions between the pyrrolic NH protons and the bound anions. C1 Univ Texas, Dept Chem & Biochem, Austin, TX 78712 USA. Los Alamos Natl Lab, Chem Sci & Technol Div, Los Alamos, NM 87545 USA. PMUSA, New Technol Res Dept, INEST, Richmond, VA 23298 USA. RP Sessler, JL (reprint author), Univ Texas, Dept Chem & Biochem, 1 Univ Stn,A5300, Austin, TX 78712 USA. EM sessler@mail.utexas.edu RI Gross, Dustin/B-4249-2011 OI Gross, Dustin/0000-0001-8668-3380 NR 38 TC 53 Z9 53 U1 2 U2 14 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0022-3263 J9 J ORG CHEM JI J. Org. Chem. PD JUL 22 PY 2005 VL 70 IS 15 BP 5982 EP 5986 DI 10.1021/jo050662c PG 5 WC Chemistry, Organic SC Chemistry GA 947FV UT WOS:000230629700026 PM 16018694 ER PT J AU Jain, D Kim, Y Maxwell, KL Beasley, S Zhang, RG Gussin, GN Edwards, AM Darst, SA AF Jain, D Kim, Y Maxwell, KL Beasley, S Zhang, RG Gussin, GN Edwards, AM Darst, SA TI Crystal structure of bacteriophage lambda cII and its DNA complex SO MOLECULAR CELL LA English DT Article ID POLYMERASE-ALPHA-SUBUNIT; C-TERMINAL DOMAIN; COLI RNA-POLYMERASE; CATABOLITE ACTIVATOR PROTEIN; TRANSCRIPTION ACTIVATION; PHAGE-LAMBDA; MACROMOLECULAR STRUCTURES; PROMOTER RECOGNITION; DEPENDENT PROMOTERS; BACTERIAL PROMOTERS AB The tetrameric cll protein from bacteriophage lambda activates transcription from the phage promoters P-RE, P-i, and P-AQ by binding to two direct repeats that flank the promoter -35 element. Here, we present the X-ray crystal structure of cll alone (2.8 angstrom resolution) and in complex with its DNA operator from PRE (1.7 angstrom resolution). The structures provide a basis for modeling of the activation complex with the RNA polymerase holoenzyme, and point to the key role for the RNA polymerase alpha subunit C-terminal domain (alpha CTD) in cll-dependent activation, which forms a bridge of protein/protein interactions between cll and the RNA polymerase sigma subunit. The model makes specific predictions for protein/protein interactions between cll and alpha CTD, and between aCTD and sigma, which are supported by previous genetic studies. C1 Rockefeller Univ, New York, NY 10021 USA. Argonne Natl Lab, Struct Biol Ctr, Biosci Div, Argonne, IL 60439 USA. Univ Toronto, Banting & Best Dept Med Res, Ontario Ctr Struct Prot, Toronto, ON M5G 1L6, Canada. Univ Iowa, Dept Biol Sci, Iowa City, IA 52242 USA. RP Darst, SA (reprint author), Rockefeller Univ, 1230 York Ave, New York, NY 10021 USA. EM darst@rockefeller.edu OI Jain, Deepti/0000-0002-8631-7230 FU NIGMS NIH HHS [GM53759, GM62414] NR 66 TC 26 Z9 27 U1 1 U2 3 PU CELL PRESS PI CAMBRIDGE PA 1100 MASSACHUSETTS AVE, CAMBRIDGE, MA 02138 USA SN 1097-2765 J9 MOL CELL JI Mol. Cell PD JUL 22 PY 2005 VL 19 IS 2 BP 259 EP 269 DI 10.1016/j.molcel.2005.06.006 PG 11 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 949EC UT WOS:000230766700011 PM 16039594 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 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 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 Safai Tehrani, F 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 Hamel de Monchenault, G 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 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Geddes, NI Gopal, GP Olaiya, EO Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF Hamel de Monchenault, G 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 TI Search for the rare leptonic decay B-->tau(-)nu(tau) SO PHYSICAL REVIEW LETTERS LA English DT Article ID DETECTOR; PHYSICS; LIMIT AB We present a search for the decay B- -> tau(-)<(nu)over bar >(tau) in a sample of 88.9 x 10(6) B (B) over bar pairs recorded with the BABAR detector at the Stanford Linear Accelerator Center B factory. One of the two B mesons from the Upsilon(4S) is reconstructed in a hadronic or a semileptonic final state, and the decay products of the other B in the event are analyzed for consistency with a B- -> tau(-)<(nu)over bar >(tau) decay. We find no evidence of a signal and set an upper limit on the branching fraction of B((B) over bar -> tau(-)<(nu)over bar >(tau)) < 4.2 x 10(-4) at the 90% confidence level. C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France. Univ Bari, Dipartimento Fis, I-70126 Bari, Italy. Univ Bari, 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 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. 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RI de Sangro, Riccardo/J-2901-2012; M, Saleem/B-9137-2013; Cavallo, Nicola/F-8913-2012; Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; crosetti, nanni/H-3040-2011; Roe, Natalie/A-8798-2012; Neri, Nicola/G-3991-2012; Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani, Claudia/C-5223-2009; Lusiani, Alberto/A-3329-2016; Lo Vetere, Maurizio/J-5049-2012; Saeed, Mohammad Alam/J-7455-2012; Negrini, Matteo/C-8906-2014; Luppi, Eleonora/A-4902-2015; Martinez Vidal, F*/L-7563-2014; Monge, Maria Roberta/G-9127-2012; Kolomensky, Yury/I-3510-2015; Grancagnolo, Sergio/J-3957-2015; Mir, Lluisa-Maria/G-7212-2015; Della Ricca, Giuseppe/B-6826-2013; Sarti, Alessio/I-2833-2012; Kravchenko, Evgeniy/F-5457-2015; Pappagallo, Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Lusiani, Alberto/N-2976-2015; Morandin, Mauro/A-3308-2016; Di Lodovico, Francesca/L-9109-2016; Calabrese, Roberto/G-4405-2015; Oyanguren, Arantza/K-6454-2014 OI de Sangro, Riccardo/0000-0002-3808-5455; Peters, Klaus/0000-0001-7133-0662; 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; Lusiani, Alberto/0000-0002-6876-3288; Lo Vetere, Maurizio/0000-0002-6520-4480; Saeed, Mohammad Alam/0000-0002-3529-9255; Negrini, Matteo/0000-0003-0101-6963; Luppi, Eleonora/0000-0002-1072-5633; Martinez Vidal, F*/0000-0001-6841-6035; Monge, Maria Roberta/0000-0003-1633-3195; Kolomensky, Yury/0000-0001-8496-9975; Grancagnolo, Sergio/0000-0001-8490-8304; Mir, Lluisa-Maria/0000-0002-4276-715X; Della Ricca, Giuseppe/0000-0003-2831-6982; Sarti, Alessio/0000-0001-5419-7951; Pappagallo, Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; Di Lodovico, Francesca/0000-0003-3952-2175; Calabrese, Roberto/0000-0002-1354-5400; Oyanguren, Arantza/0000-0002-8240-7300 NR 14 TC 26 Z9 26 U1 0 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 JUL 22 PY 2005 VL 95 IS 4 AR 041804 DI 10.1103/PhysRevLett.95.041804 PG 7 WC Physics, Multidisciplinary SC Physics GA 947XG UT WOS:000230680000018 PM 16090798 ER PT J AU Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges-Pous, E Palano, A Pappagallo, M 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 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 Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP Chevalier, N Cottingham, WN Kelly, MP Cuhadar-Donszelmann, T Hearty, C Knecht, NS Mattison, TS McKenna, JA Thiessen, D Khan, A Kyberd, P 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Sullivan, MK Thompson, J Va'vra, J Wagner, SR Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Roat, C Ahmed, M 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 Bomben, M Bosisio, L Cartaro, C Cossutti, F Ricca, GD Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Jackson, PD Kowalewski, R Roney, JM Sobie, RJ Back, JJ Harrison, PF Latham, TE Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mellado, B Mihalyi, A Pan, Y Prepost, R Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Greene, MG Neal, H TI Measurement of the branching fraction of Upsilon(4S)->(BB0)-B-0 SO PHYSICAL REVIEW LETTERS LA English DT Article ID NEUTRAL B-MESONS AB We report the first measurement of the branching fraction f(00) for Upsilon(4S) -> B-0(B) over bar (0). The data sample consists of 81.7 fb(-1) collected at the Upsilon(4S) resonance with the BABAR detector at the SLAC PEP-II asymmetric-energy e(+)e(-) storage ring. Using partial reconstruction of the decay (B) over bar (0) -> D(*+)l(-)<(nu)over bar >(l) in which only the charged lepton and the soft pion from the decay D*+ -> D(0)pi(+) are reconstructed, we obtain f(00) = 0.487 +/- 0.010(stat) +/- 0.008(syst). Our result does not depend on the branching fractions of (B) over bar (0) -> D(*+)l(-)<(nu)over bar >(l) and D*+ -> D(0)pi(+) decays, on the ratio of the charged and neutral B meson lifetimes, nor on the assumption of isospin symmetry. C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France. Univ Autonoma Barcelona, IFAE, E-08193 Barcelona, Spain. Univ Bari, Dipartmento Fis, I-70126 Bari, Italy. Univ Bari, Ist Nazl Fis Nucl, I-70126 Bari, Italy. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Bergen, Dept Phys, N-5007 Bergen, Norway. 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Univ Texas, Richardson, TX 75083 USA. Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy. Univ Turin, Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy. Univ Trieste, Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Univ Basilicata, I-85100 Potenza, Italy. RP Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France. RI Negrini, Matteo/C-8906-2014; 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; Lusiani, Alberto/A-3329-2016; Morandin, Mauro/A-3308-2016; Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; 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; M, Saleem/B-9137-2013; Sarti, Alessio/I-2833-2012; Cavallo, Nicola/F-8913-2012; Saeed, Mohammad Alam/J-7455-2012; Della Ricca, Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016 OI Negrini, Matteo/0000-0003-0101-6963; 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; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; Peters, Klaus/0000-0001-7133-0662; 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; Della Ricca, Giuseppe/0000-0003-2831-6982; Di Lodovico, Francesca/0000-0003-3952-2175; Pappagallo, Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636 NR 23 TC 1 Z9 1 U1 0 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. 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Mazzoni, MA Morganti, S Piredda, G Polci, F Tehrani, FS Voena, C Christ, S Schroder, H Wagner, G Waldi, R Adye, T De Groot, N Franek, B Gopal, GP Olaiya, EO Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF Graziani, G Hamel de Monchenault, G Kozanecki, W Legendre, M London, GW Mayer, B Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Abe, T Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Claus, R Convery, MR Cristinziani, M De Nardo, G Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W 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 Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Soha, A Stelzer, J Strube, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Roat, C Ahmed, M 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 Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Jackson, PD Kowalewski, R Roney, JM Sobie, RJ Yun, Z Back, JJ Harrison, PF Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mihalyi, A Pan, Y Prepost, R Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Greene, MG Neal, H TI Search for lepton flavor violation in the decay tau(+/-)->mu(+/-)gamma SO PHYSICAL REVIEW LETTERS LA English DT Article ID JETS AB A search for the nonconservation of lepton flavor number in the decay tau(+/-)->mu(+/-)gamma has been performed using 2.07 x 10(8) e(+)e(-)->tau(+)tau(-) events produced at a center-of-mass energy near 10.58 GeV with the BABAR detector at the PEP-II storage ring. 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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. Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. RP Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France. RI Peters, Klaus/C-2728-2008; Cavallo, Nicola/F-8913-2012; Saeed, Mohammad Alam/J-7455-2012; de Groot, Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; crosetti, nanni/H-3040-2011; Roe, Natalie/A-8798-2012; 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; Negrini, Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Oyanguren, Arantza/K-6454-2014; 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; Sarti, Alessio/I-2833-2012; M, Saleem/B-9137-2013; Lusiani, Alberto/N-2976-2015; Morandin, Mauro/A-3308-2016; Lusiani, Alberto/A-3329-2016; Della Ricca, Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016 OI Peters, Klaus/0000-0001-7133-0662; Saeed, Mohammad Alam/0000-0002-3529-9255; 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; Negrini, Matteo/0000-0003-0101-6963; Monge, Maria Roberta/0000-0003-1633-3195; Oyanguren, Arantza/0000-0002-8240-7300; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; 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; Sarti, Alessio/0000-0001-5419-7951; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; Lusiani, Alberto/0000-0002-6876-3288; Della Ricca, Giuseppe/0000-0003-2831-6982; Di Lodovico, Francesca/0000-0003-3952-2175; Pappagallo, Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636 NR 24 TC 196 Z9 197 U1 0 U2 10 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 JUL 22 PY 2005 VL 95 IS 4 AR 041802 DI 10.1103/PhysRevLett.95.041802 PG 7 WC Physics, Multidisciplinary SC Physics GA 947XG UT WOS:000230680000016 PM 16197131 ER PT J AU Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges-Pous, E 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 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 Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP 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 Weinstein, AJR Foulkes, SD Gary, JW Long, O Shen, BC Wang, K del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Cunha, A Dahmes, B Hong, TM Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Eisner, AM Flacco, CJ 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 Blanc, F Bloom, P Chen, S Ford, WT Nauenberg, U Olivas, A Rankin, P Ruddick, WO Smith, JG Ulmer, KA Zhang, J Zhang, L Chen, A Eckhart, EA Harton, JL Soffer, A Toki, WH Wilson, RJ Zeng, Q Spaan, B Altenburg, D Brandt, T Brose, J Dickopp, M Feltresi, E Hauke, A Lacker, HM Maly, E Nogowski, R Otto, S Petzold, A Schott, G Schubert, J Schubert, KR Schwierz, R Sundermann, JE Bernard, D Bonneaud, GR Grenier, P Schrenk, S Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Clark, PJ 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 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 Marks, J Uwer, 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 Mohapatra, AK Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Rubin, AE Yi, J Arnaud, N Davier, M Giroux, X Grosdidier, G Hocker, A Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Pierini, M Plaszczynski, S Schune, MH 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 Touramanis, C Cormack, CM Di Lodovico, F 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 Naisbit, MT Williams, JC Chen, C Farbin, A Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Koeneke, K Sciolla, G Sekula, SJ Taylor, F Yamamoto, RK 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 Benelli, G 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 Lu, M 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 Voci, C Benayoun, M Briand, H Chauveau, J David, P Buono, LD de la Vaissiere, C Hamon, O John, MJJ Leruste, P Malcles, J Ocariz, J Roos, L Therin, G Behera, PK Gladney, L Guo, QH Panetta, J Biasini, M Covarelli, R Pioppi, M Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Simi, G 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 D'Orazio, A Di Marco, E Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Piredda, G Polci, F Tehrani, FS Voena, C Christ, S Schroder, H Wagner, G Waldi, R Adye, T De Groot, N Franek, B Gopal, GP Olaiya, EO Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF Graziani, G Hamel de Monchenault, G Kozanecki, W Legendre, M London, GW Mayer, B Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Abe, T Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Claus, R Convery, MR Cristinziani, M De Nardo, G Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W 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 Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Soha, A Stelzer, J Strube, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Roat, C Ahmed, M 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 Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Jackson, PD Kowalewski, R Roney, JM Sobie, RJ Back, JJ Harrison, PF Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mihalyi, A 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 Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges-Pous, E 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 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 Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP 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 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Schune, MH 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 Touramanis, C Cormack, CM Di Lodovico, F 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 Naisbit, MT Williams, JC Chen, C Farbin, A Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Koeneke, K Sciolla, G Sekula, SJ Taylor, F Yamamoto, RK 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 Benelli, G 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 Lu, M 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 Voci, C Benayoun, M Briand, H Chauveau, J David, P Buono, LD de la Vaissiere, C Hamon, O John, MJJ Leruste, P Malcles, J Ocariz, J Roos, L Therin, G Behera, PK Gladney, L Guo, QH Panetta, J Biasini, M Covarelli, R Pioppi, M Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Simi, G 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 D'Orazio, A Di Marco, E Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Piredda, G Polci, F Tehrani, FS Voena, C Christ, S Schroder, H Wagner, G Waldi, R Adye, T De Groot, N Franek, B Gopal, GP Olaiya, EO Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF Graziani, G Hamel de Monchenault, G Kozanecki, W Legendre, M London, GW Mayer, B Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Abe, T Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Claus, R Convery, MR Cristinziani, M De Nardo, G Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W 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 Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Soha, A Stelzer, J Strube, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Roat, C Ahmed, M 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 Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Jackson, PD Kowalewski, R Roney, JM Sobie, RJ Back, JJ Harrison, PF Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mihalyi, A Pan, Y Prepost, R Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Greene, MG Neal, H TI Search for strange-pentaquark production in e(+)e(-) annihilation at root s=10.58 GeV SO PHYSICAL REVIEW LETTERS LA English DT Article ID POSITIVE-STRANGENESS; PHOTOPRODUCTION; RESONANCE; BARYON; DETECTOR; PHYSICS; STATE; MASS AB We search for strange-pentaquark states that have been previously reported by other experiments-the Theta(1540)(+), Xi(5)(1860)(--), and Xi(5)(1860)(0)-in 123 fb(-1) of data recorded with the BABAR detector at the PEP-II e(+)e(-) storage ring. We find no evidence for these states and set 95% confidence level upper limits on the number of Theta(1540)(+) and Xi(5)(1860)(--) pentaquarks produced per e(+)e(-) annihilation into q (q) over bar and per Upsilon(4S) decay. For q (q) over bar events the Theta(1540)(+) [Xi(5)(1860)(--)] limit is about 8 [4] times lower than the rates measured for ordinary baryons of similar mass. C1 Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. Univ Autonoma Barcelona, IFAE, E-08193 Barcelona, Spain. Univ Bari, Dipartimento Fis, I-70126 Bari, Italy. Univ Bari, 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 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. 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RI Saeed, Mohammad Alam/J-7455-2012; Negrini, Matteo/C-8906-2014; 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; Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; crosetti, nanni/H-3040-2011; Roe, Natalie/A-8798-2012; 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; Cavallo, Nicola/F-8913-2012; 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 OI 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; 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; Peters, Klaus/0000-0001-7133-0662; 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; 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 NR 13 TC 27 Z9 29 U1 0 U2 6 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. 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Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote, D Taras, P Viaud, B Nicholson, H Cavallo, N De Nardo, G 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 Benelli, G Gan, KK Honscheid, K Hufnagel, D Jackson, PD Kagan, H Kass, R Pulliam, T Rahimi, AM Ter-Antonyan, R Wong, QK Brau, J Frey, R Igonkina, O Lu, M 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 Voci, C Benayoun, M Briand, H Chauveau, J David, P Del Buono, L de la Vaissiere, C Hamon, O John, MJJ Leruste, P Malcles, J Ocariz, J Roos, L Therin, G Behera, PK Gladney, L Guo, QH Panetta, J Biasini, M Covarelli, R Pioppi, M Angelini, C Batignani, G Bettarini, S Bucci, F Calderini, G Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Simi, G Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Biesiada, J Danielson, N Elmer, P Lau, YP Lu, C Olsen, J Smith, AJS Telnov, AV Bellini, F Cavoto, G D'Orazio, A Di Marco, E Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Piredda, G Polci, F Tehrani, FS Voena, C Christ, S Schroder, H Wagner, G Waldi, R Adye, T De Groot, N Franek, B Gopal, GP Olaiya, EO Wilson, FF Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF Graziani, G Hamel de Monchenault, G Kozanecki, W Legendre, M London, GW Mayer, B Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Abe, T Allen, MT Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Claus, R Convery, MR Cristinziani, M Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W Fan, S Field, RC Glanzman, T Gowdy, SJ Hadig, T Halyo, V Hast, C Hryn'ova, T Innes, WR Kazuhito, S 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 Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Soha, A Stelzer, J Strube, J Su, D Sullivan, MK Thompson, JM Va'vra, J Wagner, SR Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Roat, C Ahmed, M Ahmed, S Alam, MS Ernst, JA Saeed, MA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Bomben, M Bosisio, L Cartaro, C Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Kowalewski, R Roney, JM Sobie, RJ Back, JJ Harrison, PF Latham, TE Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mellado, B Mihalyi, A Pan, Y Prepost, R Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Greene, MG Neal, H TI Improved measurement of the Cabibbo-Kobayashi-Maskawa angle alpha using B-0(B)->rho(+)rho(-) decays SO PHYSICAL REVIEW LETTERS LA English DT Article AB We present results from an analysis of B-0 ((B) over bar (0)) -> rho(+)p(-) using 232 x 10(6) Upsilon(4S) -> B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We measure the longitudinal polarization fraction f(L) = 0.978 +/- 0.014(stat)(-0.029)(+0.021)(syst) and the CP-violating parameters S-L = -0.33 +/- 0.24(stat)(-0.14)(+0.08)(syst) and C-L = -0.03 +/- 0.18(stat) +/- 0.09(syst). Using an isospin analysis of B -> rho rho decays, we determine the unitarity triangle parameter alpha. The solution compatible with the standard model is alpha = (100 +/- 13)degrees. C1 Lab Phys Particules, F-74941 Annecy Le Vieux, France. Univ Autonoma Barcelona, IFAE, E-08193 Bellaterra, Barcelona, Spain. Univ Bari, Dipartimento Fis, I-70126 Bari, Italy. Univ Bari, Ist Nazl Fis Nucl, I-70126 Bari, Italy. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Bargen, Inst Phys, N-5007 Bergen, Norway. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, England. Ruhr Univ Bochum, Inst Exp Phys 1, D-44780 Bochum, Germany. Univ Bristol, Bristol BS8 1TL, England. Univ British Columbia, Vancouver, BC V6T 1Z1, Canada. Brunel Univ, Uxbridge UB8 3PH, Middlesex, 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. Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany. Tech Univ Dresden, Inst Kern Teilchenphys, D-01062 Dresden, Germany. Ecole Polytech, LLR, F-91128 Palaiseau, France. Univ Edinburgh, Edinburgh EH9 3JZ, Scotland. Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy. Univ Ferrara, Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Univ Genoa, Ist Nazl Fis Nucl, I-16146 Genoa, Italy. Harvard Univ, Cambridge, MA 02138 USA. Heidelberg Univ, Phys Inst, 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 Lab, Livermore, CA 94550 USA. Univ Liverpool, Liverpool L69 72E, England. Queen Mary Univ London, 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, 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. Univ Milan, 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. Univ Naples Federico II, 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-35100 Padua, Italy. Univ Padua, Ist Nazl Fis Nucl, I-35100 Padua, Italy. Univ Paris 06, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France. Univ Paris 07, Lab Phys Nucl & Hautes Energies, F-75221 Paris, France. Univ Penn, Philadelphia, PA 19104 USA. Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy. Univ Perugia, Ist Nazl Fis Nucl, I-06100 Perugia, Italy. Univ Pisa, Dipartimento Fis, Scuola Normale Super, I-56127 Pisa, Italy. Univ Pisa, 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. Univ Roma La Sapienza, 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. Univ Turin, Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy. Univ Trieste, Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06520 USA. RI Lusiani, Alberto/N-2976-2015; Morandin, Mauro/A-3308-2016; Lusiani, Alberto/A-3329-2016; Della Ricca, Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Negrini, Matteo/C-8906-2014; Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; 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; Cavallo, Nicola/F-8913-2012; Saeed, Mohammad Alam/J-7455-2012; 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; Roe, Natalie/A-8798-2012 OI Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; Lusiani, Alberto/0000-0002-6876-3288; Della Ricca, Giuseppe/0000-0003-2831-6982; Di Lodovico, Francesca/0000-0003-3952-2175; Pappagallo, Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Negrini, Matteo/0000-0003-0101-6963; Peters, Klaus/0000-0001-7133-0662; 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; 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; NR 19 TC 36 Z9 36 U1 0 U2 6 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 22 PY 2005 VL 95 IS 4 AR 041805 DI 10.1103/PhysRevLett.95.041805 PG 7 WC Physics, Multidisciplinary SC Physics GA 947XG UT WOS:000230680000019 PM 16090799 ER PT J AU Bei, H George, EP Hay, JL Pharr, GM AF Bei, H George, EP Hay, JL Pharr, GM TI Influence of indenter tip geometry on elastic deformation during nanoindentation SO PHYSICAL REVIEW LETTERS LA English DT Article ID INCIPIENT PLASTICITY; SINGLE-CRYSTALS; YIELD-POINT; THIN-FILMS; INDENTATION; BEHAVIOR; MODULUS; LOAD AB Nanoindentation with a Berkovich indenter is commonly used to investigate the mechanical behavior of small volumes of materials. To date, most investigators have made the simplifying assumption that the tip is spherical. In reality, indenter tips are much more complex. Here, we develop a new method to describe the tip shape using the experimentally determined area function of the indenter at small depths (0-100 nm). Our analysis accurately predicts the elastic load-displacement curve and allows the theoretical strength of a material to be determined from pop-in data. Application of our new method to single crystal Cr3Si shows that the predicted theoretical strengths are within 12% of the ideal strength G/2 pi, where G is the shear modulus. C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. MTS Syst Corp, Nano Instruments Innovat Ctr, Oak Ridge, TN 37830 USA. RP Bei, H (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. RI Wagner, Martin/A-6880-2008; George, Easo/L-5434-2014; OI Bei, Hongbin/0000-0003-0283-7990 NR 18 TC 119 Z9 121 U1 6 U2 55 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 JUL 22 PY 2005 VL 95 IS 4 AR 045501 DI 10.1103/PhysRevLett.95.045501 PG 4 WC Physics, Multidisciplinary SC Physics GA 947XG UT WOS:000230680000038 PM 16090818 ER PT J AU Brodsky, SJ Carlson, CE Hiller, JR Hwang, DS AF Brodsky, SJ Carlson, CE Hiller, JR Hwang, DS TI Constraints on proton structure from precision atomic-physics measurements - Reply SO PHYSICAL REVIEW LETTERS LA English DT Editorial Material ID POLARIZABILITY CONTRIBUTION; HYDROGEN; ZEMACH C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Coll William & Mary, Dept Phys, Particle Theory Grp, Williamsburg, VA 23187 USA. Univ Minnesota, Dept Phys, Duluth, MN 55812 USA. Sejong Univ, Dept Phys, Seoul 143747, South Korea. RP Brodsky, SJ (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. NR 8 TC 5 Z9 5 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 JUL 22 PY 2005 VL 95 IS 4 AR 049102 DI 10.1103/PhysRevLett.95.049102 PG 1 WC Physics, Multidisciplinary SC Physics GA 947XG UT WOS:000230680000071 ER PT J AU Burch, KS Schafgans, A Butch, NP Sayles, TA Maple, MB Sales, BC Mandrus, D Basov, DN AF Burch, KS Schafgans, A Butch, NP Sayles, TA Maple, MB Sales, BC Mandrus, D Basov, DN TI Optical study of interactions in a d-electron kondo lattice with ferromagnetism SO PHYSICAL REVIEW LETTERS LA English DT Article ID HEAVY-FERMION COMPOUNDS; COLOSSAL MAGNETORESISTANCE; TRANSPORT-PROPERTIES; YB14MNSB11; TRANSITION; EXCHANGE; STATE AB We report on a comprehensive optical, transport, and thermodynamic study of the Zintl compound Yb(14)MnSb(11), demonstrating that it is the first ferromagnetic Kondo lattice compound in the underscreened limit. We propose a scenario whereby the combination of Kondo and Jahn-Teller effects provides a consistent explanation of both transport and optical data. C1 Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA. Univ Calif San Diego, Inst Pure & Appl Phys Sci, La Jolla, CA 92093 USA. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RP Burch, KS (reprint author), Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA. EM burch@physics.ucsd.edu RI Mandrus, David/H-3090-2014; OI Burch, Kenneth/0000-0002-7541-0245 NR 24 TC 30 Z9 30 U1 3 U2 9 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 22 PY 2005 VL 95 IS 4 AR 046401 DI 10.1103/PhysRevLett.95.046401 PG 4 WC Physics, Multidisciplinary SC Physics GA 947XG UT WOS:000230680000045 PM 16090825 ER PT J AU Faoro, L Bergli, J Altshuler, BL Galperin, YM AF Faoro, L Bergli, J Altshuler, BL Galperin, YM TI Models of environment and T-1 relaxation in Josephson charge qubits SO PHYSICAL REVIEW LETTERS LA English DT Article ID MACROSCOPIC QUANTUM STATES; OSCILLATIONS AB A theoretical interpretation of the recent experiments of Astafiev et al. on the T-1-relaxation rate in Josephson charge qubits is proposed. The experimentally observed reproducible nonmonotonic dependence of T-1 on the splitting E-J of the qubit levels suggests further specification of the previously proposed models of the background charge noise. From our point of view the most promising is the "Andreev fluctuator" model of the noise. In this model the fluctuator is a Cooper pair that tunnels from a superconductor and occupies a pair of localized electronic states. Within this model one can naturally explain both the average linear T-1(E-J) dependence and the irregular fluctuations. C1 Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA. Princeton Univ, Dept Phys, Princeton, NJ 08544 USA. NEC Labs Amer Inc, Princeton, NJ 08540 USA. Univ Oslo, Dept Phys, N-0316 Oslo, Norway. Russian Acad Sci, AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia. Argonne Natl Lab, Argonne, IL 60439 USA. RP Faoro, L (reprint author), Rutgers State Univ, Dept Phys & Astron, 136 Frelinghuysen Rd, Piscataway, NJ 08854 USA. EM jbergli@fys.uio.no RI Galperin, Yuri/A-1851-2008; Bergli, Joakim/A-1707-2008 OI Galperin, Yuri/0000-0001-7281-9902; NR 9 TC 45 Z9 45 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 JUL 22 PY 2005 VL 95 IS 4 AR 046805 DI 10.1103/PhysRevLett.95.046805 PG 4 WC Physics, Multidisciplinary SC Physics GA 947XG UT WOS:000230680000054 PM 16090834 ER PT J AU Friar, JL Sick, I AF Friar, JL Sick, I TI Constraints on proton structure from precision atomic-physics measurements SO PHYSICAL REVIEW LETTERS LA English DT Editorial Material ID HYDROGEN C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Basel, CH-4056 Basel, Switzerland. RP Friar, JL (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. NR 7 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 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 22 PY 2005 VL 95 IS 4 AR 049101 DI 10.1103/PhysRevLett.95.049101 PG 1 WC Physics, Multidisciplinary SC Physics GA 947XG UT WOS:000230680000070 PM 16090850 ER PT J AU Guo, J Lee, G Plummer, EW AF Guo, J Lee, G Plummer, EW TI Intertwined electronic and structural phase transitions in the In/Si(111) interface SO PHYSICAL REVIEW LETTERS LA English DT Article ID QUANTUM CHAINS; SILICON; SURFACE; STATE AB The structural (4x1) to (8x2) transition and the electronic metal to semimetal transition at the In/Si interface are studied with scanning tunneling microscopy and spectroscopy. Both transitions are gradual, resulting in a complex domain structure in the transition temperature regime. At these intermediate temperatures, the metallic (4x1) and semimetallic (8x2) domains coexist with each other and with new nanophases. By probing the two intertwined but distinguishable transitions at the atomic level, the interaction between different phases is visualized directly. C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Inha Univ, Dept Phys, Inchon 402751, South Korea. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RP Guo, J (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. RI Guo, Jiandong/F-2081-2015 OI Guo, Jiandong/0000-0002-7893-022X NR 19 TC 50 Z9 51 U1 2 U2 6 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 22 PY 2005 VL 95 IS 4 AR 046102 DI 10.1103/PhysRevLett.95.046102 PG 4 WC Physics, Multidisciplinary SC Physics GA 947XG UT WOS:000230680000044 PM 16090824 ER PT J AU Litvinov, YA Burvenich, TJ Geissel, H Novikov, YN Patyk, Z Scheidenberger, C Attallah, F Audi, G Beckert, K Bosch, F Falch, M Franzke, B Hausmann, M Kerscher, T Klepper, O Kluge, HJ Kozhuharov, C Lobner, KEG Madland, DG Maruhn, JA Munzenberg, G Nolden, F Radon, T Steck, M Typel, S Wollnik, H AF Litvinov, YA Burvenich, TJ Geissel, H Novikov, YN Patyk, Z Scheidenberger, C Attallah, F Audi, G Beckert, K Bosch, F Falch, M Franzke, B Hausmann, M Kerscher, T Klepper, O Kluge, HJ Kozhuharov, C Lobner, KEG Madland, DG Maruhn, JA Munzenberg, G Nolden, F Radon, T Steck, M Typel, S Wollnik, H TI Isospin dependence in the odd-even staggering of nuclear binding energies SO PHYSICAL REVIEW LETTERS LA English DT Article ID SCHOTTKY MASS-SPECTROMETRY; MEAN-FIELD MODELS; PROJECTILE FRAGMENTS; NUBASE EVALUATION; DECAY PROPERTIES; PAIRING GAPS; NEUTRON; GSI; HEAVY; FACILITY AB The FRS-ESR facility at GSI provides unique conditions for precision measurements of large areas on the nuclear mass surface in a single experiment. Values for masses of 604 neutron-deficient nuclides (30 <= Z <= 92) were obtained with a typical uncertainty of 30 mu u. The masses of 114 nuclides were determined for the first time. The odd-even staggering (OES) of nuclear masses was systematically investigated for isotopic chains between the proton shell closures at Z=50 and Z=82. The results were compared with predictions of modern nuclear models. The comparison revealed that the measured trend of OES is not reproduced by the theories fitted to masses only. The spectral pairing gaps extracted from models adjusted to both masses, and density related observables of nuclei agree better with the experimental data. C1 Gesell Schwerionenforsch GSI, D-64291 Darmstadt, Germany. JLU Giessen, Inst Phys 2, D-35392 Giessen, Germany. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Max Planck Inst Kernphys, D-69117 Heidelberg, Germany. St Petersburg Nucl Phys Inst, Gatchina 188350, Russia. Soltan Inst Nucl Studies, PL-00681 Warsaw, Poland. CNRS, IN2P3, CSNSM, F-91405 Orsay, France. LMU Munchen, Sekt Phys, D-85748 Garching, Germany. JWGU Frankfurt, Inst Theoret Phys, D-60054 Frankfurt, Germany. RP Gesell Schwerionenforsch GSI, Planckstr 1, D-64291 Darmstadt, Germany. RI Novikov, Iurii/M-7784-2013 OI Novikov, Iurii/0000-0002-5369-7142 NR 35 TC 37 Z9 37 U1 0 U2 3 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 JUL 22 PY 2005 VL 95 IS 4 AR 042501 DI 10.1103/PhysRevLett.95.042501 PG 4 WC Physics, Multidisciplinary SC Physics GA 947XG UT WOS:000230680000022 PM 16090802 ER EF