FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Majumdar, S AF Majumdar, S TI Structural analysis of electrosleeved tubes under severe accident transients SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article; Proceedings Paper CT 27th Water Reactor Safety Information Meeting (WRSM) CY OCT 25-27, 1999 CL BETHESDA, MARYLAND AB A flow stress model was developed for predicting failure of electrosleeved PWR steam generator tubing under severe accident transients. The electrosleeve, which is nanocrystalline pure nickel, loses its strength at temperatures greater than 400 degreesC during severe accidents because of grain growth. A grain growth model and the Hall-Petch relationship were used to calculate the loss of flow stress as a function of time and temperature during the accident. Available tensile test data, as well as high-temperature failure tests, on notched electrosleeved tube specimens were used to derive the basic parameters of the failure model. The model was used to predict the failure temperatures of electrosleeved tubes with throughwall and part-throughwall axial cracks in the parent tube during a postulated severe accident transient. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA. RP Majumdar, S (reprint author), Argonne Natl Lab, Div Energy Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 8 TC 2 Z9 2 U1 0 U2 0 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 SEP PY 2001 VL 208 IS 2 BP 167 EP 179 DI 10.1016/S0029-5493(01)00374-0 PG 13 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 469MR UT WOS:000170819900005 ER PT J AU Diamond, DJ Aronson, A Jo, J Avvakumov, A Malofeev, V Sidorov, V Ferraresi, P Gouin, C Aniel, S Royer, ME AF Diamond, DJ Aronson, A Jo, J Avvakumov, A Malofeev, V Sidorov, V Ferraresi, P Gouin, C Aniel, S Royer, ME TI Intercomparison of results for a PWR rod ejection accident SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article; Proceedings Paper CT 27th Water Reactor Safety Information Meeting (WRSM) CY OCT 25-27, 1999 CL BETHESDA, MARYLAND AB This study is part of an overall program to understand the uncertainty in best-estimate calculations of the local fuel enthalpy during the rod ejection accident. Local fuel enthalpy is used as the acceptance criterion for this design-basis event and can also be used to estimate fuel damage for the purpose of determining radiological consequences. The study used results from neutron kinetics models in PARCS, BARS, and CRONOS2, codes developed in the United States, the Russian Federation, and France, respectively. Since BARS uses a heterogeneous representation of the fuel assembly as opposed to the homogeneous representations in PARCS and CRONOS, the effect of the intercomparison was primarily to compare different intra-assembly models. Quantitative comparisons for core power, reactivity, assembly fuel enthalpy and pin power were carried out. In general, the agreement between methods was very good, providing additional confidence in the codes and providing a starting point for a quantitative assessment of the uncertainty in calculated fuel enthalpy using best-estimate methods. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Brookhaven Natl Lab, Energy Sci & Technol Dept, Nucl Energy & Infrastruct Syst Div, Upton, NY 11973 USA. Russian Res Ctr, Kurchatov Inst, Moscow, Russia. Inst Protect & Nucl Safety, Cadarache, France. CEA, Atom Energy Commiss, Saclay, France. RP Diamond, DJ (reprint author), Brookhaven Natl Lab, Energy Sci & Technol Dept, Nucl Energy & Infrastruct Syst Div, Bldg 130,POB 5000, Upton, NY 11973 USA. NR 6 TC 3 Z9 3 U1 0 U2 2 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 SEP PY 2001 VL 208 IS 2 BP 181 EP 189 DI 10.1016/S0029-5493(01)00375-2 PG 9 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 469MR UT WOS:000170819900006 ER PT J AU Chung, HM Strain, RV Shack, WJ AF Chung, HM Strain, RV Shack, WJ TI Tensile and stress corrosion cracking properties of type 304 stainless steel irradiated to a very high dose SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article AB Certain safety-related core internal structural components of light water reactors, usually fabricated from Type 304 or 316 austenitic stainless steels (SSs), accumulate very high levels of irradiation damage (20-100 displacement per atom or dpa) by the end of life. Our databases and mechanistic understanding of the degradation of such highly irradiated components, however, are not well established. A key question is the nature of irradiation-assisted intergranular cracking at very high doses, i.e. is it purely mechanical failure or is it stress-corrosion cracking? In this work, hot-cell tests and microstructural characterization were performed on Type 304 SS from the hexagonal fuel can of the decommissioned EBR-II reactor after irradiation to approximate to 50 dpa at approximate to 370 degreesC. Slow-strain-rate tensile tests were conducted at 289 degreesC in air and in water at several levels of electrochemical potential (ECP), and microstructural characteristics were analyzed by scanning and transmission electron microscopies. The material deformed significantly by twinning and exhibited surprisingly high ductility in air, but was susceptible to severe intergranular stress corrosion cracking (IGSCC) at high ECP. Low levels of dissolved O and ECP were effective in suppressing the susceptibility of the heavily irradiated material to IGSCC, indicating that the stress corrosion process associated with irradiation-induced grain-boundary Cr depletion, rather than purely mechanical separation of grain boundaries, plays the dominant role. However, although IGSCC was suppressed, the material was susceptible to dislocation channeling at a low ECP, and this susceptibility led to a poor work-hardening capability and low ductility. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA. RP Chung, HM (reprint author), Argonne Natl Lab, Div Energy Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 34 TC 10 Z9 10 U1 1 U2 10 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 SEP PY 2001 VL 208 IS 3 BP 221 EP 234 DI 10.1016/S0029-5493(01)00411-3 PG 14 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 489ZX UT WOS:000172024100001 ER PT J AU Kramer, GJ Cheng, CZ Kusama, Y Nazikian, R Takeji, S Tobita, K AF Kramer, GJ Cheng, CZ Kusama, Y Nazikian, R Takeji, S Tobita, K TI Magnetic safety factor profile before and after sawtooth crashes investigated with toroidicity and ellipticity induced Alfven eigenmodes SO NUCLEAR FUSION LA English DT Article ID FUSION TEST REACTOR; NEUTRAL BEAM INJECTION; FAST-ION TRANSPORT; DIII-D TOKAMAK; TOROIDAL PLASMAS; ALPHA-PARTICLES; OSCILLATIONS; DRIVEN; JT-60U; MODES AB A study of toroidicity and ellipticity induced Alfven eigenmodes (TAEs and EAES) that are excited before and after sawtooth crashes during ion cyclotron range of frequency (ICRF) heating in JT-60U is presented. From the TAEs that are observed before sav.,teeth and that reside inside the q = 1 surface an upper limit has been set for q in the plasma centre at the time of the crash. After the sawtooth crash, EAEs that reside at the q = 1 surface are often observed. In a number of discharges the start uf the EAE activity is delayed to up to 150 ms after the crash. In some cases TAE activity was observed between the sawtooth crash and the onset of the EAE activity. These TAEs could be modelled successfully only when it was assumed that the central safety factor (q(o)) rises above unity after the giant sawtooth crash, The appearance of the TAE activity immediately after the giant sawtooth crash is a strong indication that the fast particle drive remains in the plasma centre. This is consistent with theoretical estimates for the confinement of deeply trapped ICRF ions. The delayed appearance of (lie EAEs is also consistent with the disappearance of the q = 1 surface from the plasma at the giant sawtooth crash. The only way to obtain agreement between the experimentally measured EAE frequencies and the NOVA-K simulations is to assume that the q = 1 surface reappears in the plasma at the start of the. EAE activity. The delayed appearance of the EAF activity seems to be correlated with the electron temperature just before the crash. C1 Japan Atom Energy Res Inst, Naka Fus Res Estab, Naka, Ibaraki 31101, Japan. Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Kramer, GJ (reprint author), Japan Atom Energy Res Inst, Naka Fus Res Estab, Naka, Ibaraki 31101, Japan. RI Cheng, Chio/K-1005-2014 NR 62 TC 24 Z9 24 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 SEP PY 2001 VL 41 IS 9 BP 1135 EP 1151 DI 10.1088/0029-5515/41/9/302 PG 17 WC Physics, Fluids & Plasmas SC Physics GA 474QM UT WOS:000171118400002 ER PT J AU Garofalo, AM Chu, MS Fredrickson, ED Gryaznevich, M Jensen, TH Johnson, LC La Haye, RJ Navratil, GA Okabayashi, M Scoville, JT Strait, EJ Turnbull, AD AF Garofalo, AM Chu, MS Fredrickson, ED Gryaznevich, M Jensen, TH Johnson, LC La Haye, RJ Navratil, GA Okabayashi, M Scoville, JT Strait, EJ Turnbull, AD CA DIII-D Team TI Resistive wall mode dynamics and active feedback control in DIII-D SO NUCLEAR FUSION LA English DT Article ID ADVANCED TOKAMAK; PLASMA ROTATION; HIGH-BETA; STABILIZATION AB Recent DIII-D experiments have shown that the growth of the n = 1 resistive wall mode (RWM) can be influenced by an external magnetic field applied in closed loop feedback using a six element error field correction coil (C coil). The RWM constitutes the primary limitation to normalized beta in recent DIII-D advanced tokamak plasma experiments. The toroidal rotation of DIII-D plasmas does not seem sufficient to completely suppress the RWM: a very slowly growing (growth rate gamma << 1/tau (omega)) or saturated RWM is often observed at normalized beta above the no wall limit and this small RWM blows the rotation. As the rotation decreases, there is a transition to more rapid growth (gamma similar to 1/tau (omega) where tau (omega) is the resistive time constant of the wall). The application of magnetic feedback is able to hold the RWM to a very small amplitude, prolonging the plasma duration above the no wall limit. for times much longer than tau (omega). These initial experimental results are being used to compare control algorithms. to benchmark models of the feedback stabilization process and to guide the design of an upgraded coil sensor system for stabilization of the RWM at normalized beta values closer to the ideal wall limit. C1 Columbia Univ, New York, NY 10027 USA. Gen Atom Co, San Diego, CA USA. Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. UKAEA, Culham Lab, Abingdon OX14 3DB, Oxon, England. RP Garofalo, AM (reprint author), Columbia Univ, New York, NY 10027 USA. NR 18 TC 83 Z9 84 U1 0 U2 6 PU INT ATOMIC ENERGY AGENCY PI VIENNA PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA SN 0029-5515 J9 NUCL FUSION JI Nucl. Fusion PD SEP PY 2001 VL 41 IS 9 BP 1171 EP 1176 DI 10.1088/0029-5515/41/9/305 PG 6 WC Physics, Fluids & Plasmas SC Physics GA 474QM UT WOS:000171118400005 ER PT J AU Sakakibara, S Yamada, H Watanabe, K Narushima, Y Toi, K Ohdachi, S Takechi, M Yamamoto, S Narihara, K Tanaka, K Ashikawa, N De Vries, P Emoto, M Funaba, H Goto, M Ida, K Idei, H Ikeda, K Inagaki, S Inoue, N Isobe, T Kado, S Kaneko, O Kawahata, K Khlopenkov, K Kobuchi, T Komori, A Kubo, S Kumazawa, R Liang, Y Masuzaki, S Minami, T Miyazawa, J Morisaki, T Morita, S Murakami, S Muto, S Mutol, T Nagayama, Y Nakamura, Y Nakanishi, H Nishimura, K Noda, N Notake, T Ohyabu, N Oka, Y Osakabe, M Ozaki, T Pavlichenko, RO Peterson, BJ Sagara, A Saito, K Sakamoto, R Sasao, H Sasao, M Sato, K Sato, M Seki, T Shimozuma, T Shoji, M Suzuki, H Takeiri, Y Tamura, N Tokuzawa, T Torii, Y Tsumori, K Yamada, I Yamaguchi, S Yokoyama, M Yoshimura, Y Watari, T Nakajima, N Ichiguchi, K Takahashi, H Cooper, AW Yamazaki, K Motojima, O Hamada, Y Fujiwara, M AF Sakakibara, S Yamada, H Watanabe, K Narushima, Y Toi, K Ohdachi, S Takechi, M Yamamoto, S Narihara, K Tanaka, K Ashikawa, N De Vries, P Emoto, M Funaba, H Goto, M Ida, K Idei, H Ikeda, K Inagaki, S Inoue, N Isobe, T Kado, S Kaneko, O Kawahata, K Khlopenkov, K Kobuchi, T Komori, A Kubo, S Kumazawa, R Liang, Y Masuzaki, S Minami, T Miyazawa, J Morisaki, T Morita, S Murakami, S Muto, S Mutol, T Nagayama, Y Nakamura, Y Nakanishi, H Nishimura, K Noda, N Notake, T Ohyabu, N Oka, Y Osakabe, M Ozaki, T Pavlichenko, RO Peterson, BJ Sagara, A Saito, K Sakamoto, R Sasao, H Sasao, M Sato, K Sato, M Seki, T Shimozuma, T Shoji, M Suzuki, H Takeiri, Y Tamura, N Tokuzawa, T Torii, Y Tsumori, K Yamada, I Yamaguchi, S Yokoyama, M Yoshimura, Y Watari, T Nakajima, N Ichiguchi, K Takahashi, H Cooper, AW Yamazaki, K Motojima, O Hamada, Y Fujiwara, M TI MHD characteristics in the high beta regime of the Large Helical Device SO NUCLEAR FUSION LA English DT Article ID HEATED PLASMAS; HELIOTRON-E; CURRENTLESS; DISCHARGES; STABILITY; TRANSPORT; CHS AB The highest volume averaged beta values beta (t) of 2.2% at B-t = 0.75 T (gas puff) and 2.4% at D-t = 1.3 T (pellet) in helical devices have been achieved in LHD. The beta (t) dependence of MHD activities has been investigated in NBI plasmas. The n/m = 1/2 mode, excited in the core region, and the t = 1 resonant modes, in the peripheral region, have been observed. Both of the fluctuation amplitudes increase with beta (t) and pressure gradient. The strong n/m = 1/2 mode, which affects the plasma profile., has been observed in high beta (t) discharges, and the abrupt disappearance of the mode leads to restoration of the T-e profile. Violent instabilities which terminate the plasma and degradation of global energy confinement have not been observed so far. C1 Nagoya Univ, Dept Energy Engn & Sci, Nagoya, Aichi, Japan. Grad Univ Adv Studies, Dept Fus Sci, Hayama, Japan. Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Ecole Polytech Fed Lausanne, Ctr Rech Phys Plasmas, Lausanne, Switzerland. RP Nagoya Univ, Dept Energy Engn & Sci, Nagoya, Aichi, Japan. EM sakaksi@lhd.nifs.ac.jp RI Murakami, Sadayoshi/A-2191-2016; Ida, Katsumi/E-4731-2016; Sakamoto, Ryuichi/E-7557-2013 OI Murakami, Sadayoshi/0000-0002-2526-7137; Ida, Katsumi/0000-0002-0585-4561; Sakamoto, Ryuichi/0000-0002-4453-953X NR 17 TC 35 Z9 35 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0029-5515 EI 1741-4326 J9 NUCL FUSION JI Nucl. Fusion PD SEP PY 2001 VL 41 IS 9 BP 1177 EP 1183 DI 10.1088/0029-5515/41/9/306 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 474QM UT WOS:000171118400006 ER PT J AU Miner, WH Valanju, PM Hirshman, SP Brooks, A Pomphrey, N AF Miner, WH Valanju, PM Hirshman, SP Brooks, A Pomphrey, N TI Use of a genetic algorithm for compact stellarator coil design SO NUCLEAR FUSION LA English DT Article AB A new global optimization technique for designing stellarator coils has been developed and applied to the design of coils for the National Compact Stellarator Experiment. Using this technique coil sets were found with fewer coils and lower current densities than those obtained with traditional methods. A new coil design procedure which uses a genetic algorithm as the core optimization method is described and the resulting advanced coil designs presented. C1 Univ Texas, Fus Res Ctr, Austin, TX 78712 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Univ Texas, Fus Res Ctr, Austin, TX 78712 USA. EM miner@mail.utexas.edu RI pomphrey, neil/G-4405-2010 NR 16 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0029-5515 EI 1741-4326 J9 NUCL FUSION JI Nucl. Fusion PD SEP PY 2001 VL 41 IS 9 BP 1185 EP 1195 DI 10.1088/0029-5515/41/9/307 PG 11 WC Physics, Fluids & Plasmas SC Physics GA 474QM UT WOS:000171118400007 ER PT J AU Menard, JE LeBlanc, BP Sabbagh, SA Bell, MG Bell, RE Fredrickson, ED Gates, DA Jardin, SC Johnson, DW Kaye, SM Kugel, HW Maingi, R Maqueda, RJ Mueller, D Ono, M Paoletti, F Paul, SF Skinner, CH Stutman, D AF Menard, JE LeBlanc, BP Sabbagh, SA Bell, MG Bell, RE Fredrickson, ED Gates, DA Jardin, SC Johnson, DW Kaye, SM Kugel, HW Maingi, R Maqueda, RJ Mueller, D Ono, M Paoletti, F Paul, SF Skinner, CH Stutman, D CA NSTX Res Team TI Ohmic flux consumption during initial operation of the NSTX spherical torus SO NUCLEAR FUSION LA English DT Article ID ASPECT-RATIO TOKAMAKS; BOOTSTRAP-CURRENT; START; PLASMAS; DISCHARGES; EQUILIBRIA; TRANSPORT; PHYSICS; TFTR AB Spherical tokamaks, because of their blender central columns, have very limited volt second capability relative to that of standard aspect ratio tokamaks of similar plasma cross-section. Recent experiments on NSTX have begun to quantify and optimize the ohmic current drive efficiency in an MA class ST device. Sustainable ramp rates in excess of 5 MA/s during the current rise phase have been achieved on NSTX, while faster ramps generate significant MHD activity. Discharges with I-p exceeding 1 MA have been achieved in NSTX with nominal parameters: aspect ratio A = 1.3 1.4, elongation kappa = 2-2.2, triangularity delta = 0.4, internal inductance l(i) = 0.6, Ejima coefficient C-E = 0.35. Flux consumption efficiency results, performance improvements associated with first boronization and comparisons with neoclassical resistivity are described. C1 Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Columbia Univ, New York, NY USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. Johns Hopkins Univ, Baltimore, MD USA. Los Alamos Natl Lab, Los Alamos, NM USA. RP Menard, JE (reprint author), Princeton Univ, Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. RI Jardin, Stephen/E-9392-2010; Sabbagh, Steven/C-7142-2011; Stutman, Dan/P-4048-2015; OI Menard, Jonathan/0000-0003-1292-3286 NR 34 TC 16 Z9 17 U1 0 U2 2 PU INT ATOMIC ENERGY AGENCY PI VIENNA PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA SN 0029-5515 J9 NUCL FUSION JI Nucl. Fusion PD SEP PY 2001 VL 41 IS 9 BP 1197 EP 1206 DI 10.1088/0029-5515/41/9/308 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 474QM UT WOS:000171118400008 ER PT J AU Whyte, DG West, WP Wong, CPC Bastasz, R Brooks, JN Wampler, WR Brooks, NH Davis, JW Doerner, RP Haasz, AA Isler, RC Jackson, GL Macaulay-Newcombe, RG Wade, MR AF Whyte, DG West, WP Wong, CPC Bastasz, R Brooks, JN Wampler, WR Brooks, NH Davis, JW Doerner, RP Haasz, AA Isler, RC Jackson, GL Macaulay-Newcombe, RG Wade, MR TI The effect of detachment on carbon divertor erosion/redeposit ion in the DIII-D tokamak SO NUCLEAR FUSION LA English DT Article ID PLASMAS; CODE; JET AB An operational scenario has been demonstrated on the DIII-D tokamak where the graphite covered divertor is free of net erosion. Reduction of divertor carbon erosion is accomplished using a low temperature (detached) divertor plasma that eliminates physical sputtering. Likewise. the carbon influx arising from chemical erosion is found to be very low in the detached divertor, although Uncertainties exist concerning chemical erosion yield due to the unknown effect of detachment on hydrocarbon transport. Near strike point regions, the rate of carbon deposition is approximate to3 cm/burn-year, with a corresponding hydrogenic co-deposition rate greater than 1 kg/(m(2) burn-year): rates which are problematic for steady state fusion reactors. The carbon net deposition rate in the divertor is consistent with carbon arriving from the core plasma region. Carbon ion influx from the main wall is measured to be relatively large in the high density detached regime and is of sufficient magnitude to account for the deposition rate in the divertor. Divertor redeposition is, therefore, determined by non-divertor erosion and transport. Despite the success in reducing divertor erosion on DIII-D with detachment, no significant reduction is found in the core plasma carbon density, illustrating the importance of non-divertor erosion and the complex coupling between erosion/re-deposition and impurity plasma transport. C1 Univ Calif San Diego, Fus Energy Res Program, San Diego, CA 92103 USA. Gen Atom Co, San Diego, CA USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Toronto, Inst Aerosp Studies, Toronto, ON, Canada. Oak Ridge Natl Lab, Oak Ridge, TN USA. RP Whyte, DG (reprint author), Univ Calif San Diego, Fus Energy Res Program, San Diego, CA 92103 USA. OI Isler, Ralph/0000-0002-5368-7200 NR 27 TC 35 Z9 35 U1 0 U2 5 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 SEP PY 2001 VL 41 IS 9 BP 1243 EP 1252 DI 10.1088/0029-5515/41/9/313 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 474QM UT WOS:000171118400013 ER PT J AU Litvinenko, VN Park, SH Pinayev, IV Wu, Y AF Litvinenko, VN Park, SH Pinayev, IV Wu, Y TI Performance of the OK-4/Duke storage ring FEL SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 13th Conference on National Synchrotron Radiation CY JUL 17-21, 2000 CL NOVOSIBIRSK, RUSSIA DE free electron laser; storage ring; optical klystron; coherence ID FREE-ELECTRON LASER; OPTICAL KLYSTRON; OPERATION; SYSTEM; UV AB In this paper, we report measured parameters of the OK-4 FEL driven by the Duke storage ring. The OK-4 FEL was being operated continuously for 2 yr in the broad wavelength range for user applications utilising spontaneous and coherent XUV and UV radiation as well as Compton back-scattered gamma -rays in the range of 2-58 MeV. During this time, the OK-4 FEL lased in the range from 193.7 to about 730 nm using Five sets of mirrors and electron beam energies from 240 to 800 MeV. Our predictions for the OK-4 FEL are compared with measured performance, both in the CW and in the giant pulse mode. We discuss our future plans for the OK-4 FEL operation as well as the construction and commissioning of the OK-5 FEL with helical wigglers. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Duke Univ, Dept Phys, Free Electron Laser Lab, Durham, NC 27708 USA. Lawrence Berkeley Natl Lab, ALS, Berkeley, CA 94720 USA. RP Litvinenko, VN (reprint author), Duke Univ, Dept Phys, Free Electron Laser Lab, POB 90319, Durham, NC 27708 USA. NR 21 TC 10 Z9 10 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 SEP 1 PY 2001 VL 470 IS 1-2 BP 66 EP 75 DI 10.1016/S0168-9002(01)01025-7 PG 10 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 472HX UT WOS:000170979000015 ER PT J AU Tolar, DR AF Tolar, DR TI A transport condensed history algorithm for electron Monte Carlo simulations SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article ID DISTRIBUTIONS AB An advanced multiple scattering algorithm for the Monte Carlo simulation of electron transport problems is developed. Unlike established multiple scattering algorithms, this new method, called transport condensed history (TCH), is a true transport process-it simulates a transport equation that approximates the exact Boltzmann transport process. In addition to having a larger mean free path and a more isotropic scattering operator than the Boltzmann equation, the approximate transport equation also preserves the zeroth- and first-order angular moments of the exact equation. These features enable TCH to accurately predict electron position as a function of energy (path length) and to move particles across material boundaries and interfaces with acceptable accuracy and efficiency. Numerical results and dose calculations are shown to reveal the advantages of TCH over conventional condensed history schemes. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA. RP Tolar, DR (reprint author), Lawrence Livermore Natl Lab, POB 808,L-95, Livermore, CA 94551 USA. NR 20 TC 7 Z9 7 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD SEP PY 2001 VL 139 IS 1 BP 47 EP 65 PG 19 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 464TJ UT WOS:000170547600004 ER PT J AU Richards, BKS York, B West, DB Li, R Churchill, GA Belton, BN Mancuso, JJ Poole, AC AF Richards, BKS York, B West, DB Li, R Churchill, GA Belton, BN Mancuso, JJ Poole, AC TI Quantitative trait loci linked to self-selected consumption of dietary fat or carbohydrate. SO OBESITY RESEARCH LA English DT Meeting Abstract C1 Pennington Biomed Res Ctr, Baton Rouge, LA USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Jackson Lab, Bar Harbor, ME 04609 USA. NR 0 TC 1 Z9 1 U1 0 U2 1 PU NORTH AMER ASSOC STUDY OBESITY PI ROCHESTER PA C/O DR MICHAEL JENSEN, MAYO MEDICAL CENTER, MAYO CLIN 200 FIRST ST, SW, ROCHESTER, MN 55905 USA SN 1071-7323 J9 OBES RES JI Obes. Res. PD SEP PY 2001 VL 9 SU 3 BP 72S EP 72S PG 1 WC Endocrinology & Metabolism; Nutrition & Dietetics SC Endocrinology & Metabolism; Nutrition & Dietetics GA 473YF UT WOS:000171076300078 ER PT J AU Boyer, BB Heo, MS Banerjee, P Knowles, JA Leibel, RL Chung, WK Ebbesson, SOE Allison, DB AF Boyer, BB Heo, MS Banerjee, P Knowles, JA Leibel, RL Chung, WK Ebbesson, SOE Allison, DB TI Analysis of 21 candidate genes for linkage in the presence of association with obesity and HDL concentration in Alaska Natives SO OBESITY RESEARCH LA English DT Meeting Abstract C1 Univ Alaska, Inst Arctic Biol, Fairbanks, AK 99775 USA. St Lukes Roosevelt Hosp, Obes Res Ctr, New York, NY 10025 USA. Columbia Univ, New York, NY 10027 USA. Lawrence Berkeley Natl Lab, Genome Sci Dept, Berkeley, CA USA. Columbia Univ, Dept Psychiat, New York, NY 10027 USA. Columbia Univ, Div Mol Genet, New York, NY 10027 USA. Univ Alabama, Dept Biostat, Birmingham, AL 35294 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NORTH AMER ASSOC STUDY OBESITY PI ROCHESTER PA C/O DR MICHAEL JENSEN, MAYO MEDICAL CENTER, MAYO CLIN 200 FIRST ST, SW, ROCHESTER, MN 55905 USA SN 1071-7323 J9 OBES RES JI Obes. Res. PD SEP PY 2001 VL 9 SU 3 BP 105S EP 105S PG 1 WC Endocrinology & Metabolism; Nutrition & Dietetics SC Endocrinology & Metabolism; Nutrition & Dietetics GA 473YF UT WOS:000171076300210 ER PT J AU Hunt, AG AF Hunt, AG TI Michael Pollak and transport in disordered systems SO PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES LA English DT Editorial Material C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Hunt, AG (reprint author), Pacific NW Natl Lab, 3200Q St,Mail Stop K9-30,POB 999, Richland, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI LONDON PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND SN 0141-8637 J9 PHILOS MAG B JI Philos. Mag. B-Phys. Condens. Matter Stat. Mech. Electron. Opt. Magn. Prop. PD SEP PY 2001 VL 81 IS 9 BP 813 EP 817 PG 5 WC Materials Science, Multidisciplinary; Mechanics; Physics, Applied; Physics, Condensed Matter SC Materials Science; Mechanics; Physics GA 471BC UT WOS:000170906100001 ER PT J AU Chang, CM Castro Neto, AH Bishop, AR AF Chang, CM Castro Neto, AH Bishop, AR TI Nonlinear excitations in one-dimensional correlated insulators SO PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES LA English DT Article ID RANGE ELECTRON-TRANSFER; DNA DOUBLE HELIX; CHARGE-TRANSFER; SOLITON EXCITATIONS; TRANSPORT; GAS; CONDUCTORS; MECHANISM; SYSTEMS; POLYACETYLENE AB In this work we investigate charge transport in one-dimensional insulators via semiclassical and perturbative renormalization group methods. We consider the problem of electron-electron. electron-phonon and electron-two-level system interactions. We show that nonlinear collective modes such as polarons and solitons are responsible for transport. We find a new excitation in the Mott insulator: the polaronic soliton. We discuss the differences between band and Mott insulators in terms of their spin spectrum and obtain the charge and spin gaps in each one of these systems. We show that electron-electron interactions provide strong renormalizations of the energy scales in the problem. C1 Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA. Boston Univ, Dept Phys, Boston, MA 02215 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. RP Chang, CM (reprint author), Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA. EM neto@bu.edu RI Castro Neto, Antonio/C-8363-2014 OI Castro Neto, Antonio/0000-0003-0613-4010 NR 44 TC 5 Z9 5 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0141-8637 J9 PHILOS MAG B JI Philos. Mag. B-Phys. Condens. Matter Stat. Mech. Electron. Opt. Magn. Prop. PD SEP PY 2001 VL 81 IS 9 BP 827 EP 846 DI 10.1080/13642810108205775 PG 20 WC Materials Science, Multidisciplinary; Mechanics; Physics, Applied; Physics, Condensed Matter SC Materials Science; Mechanics; Physics GA 471BC UT WOS:000170906100003 ER PT J AU Hunt, AG AF Hunt, AG TI Ac hopping conduction: perspective from percolation theory SO PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES LA English DT Article ID DISORDERED-SYSTEMS; AMORPHOUS-SEMICONDUCTORS; DIELECTRIC-RELAXATION; CHALCOGENIDE GLASSES; IONIC GLASSES; POROUS-MEDIA; FERMI GLASS; TRANSPORT; SOLIDS; MODEL AB The origin of the sublinear frequency dependence of the ac conductivity is discussed using percolation theory. Different physical bases for calculation in different frequency regimes are discussed. Both the crossover frequencies separating the frequency regimes and the different results for the conductivity are given. The appropriate analogies between one- and three-dimensional systems are summarized. Some important comparisons with results from effective-medium theories are given, Results for the ac conductivity in one dimension and three dimensions are summarized in tabular and graphical (schematic) forms. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Hunt, AG (reprint author), Pacific NW Natl Lab, Mail Stop K9-30,POB 999, Richland, WA 99352 USA. NR 86 TC 69 Z9 69 U1 1 U2 8 PU TAYLOR & FRANCIS LTD PI LONDON PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND SN 0141-8637 J9 PHILOS MAG B JI Philos. Mag. B-Phys. Condens. Matter Stat. Mech. Electron. Opt. Magn. Prop. PD SEP PY 2001 VL 81 IS 9 BP 875 EP 913 DI 10.1080/13642810110060133 PG 39 WC Materials Science, Multidisciplinary; Mechanics; Physics, Applied; Physics, Condensed Matter SC Materials Science; Mechanics; Physics GA 471BC UT WOS:000170906100007 ER PT J AU Khraishi, TA Zbib, HM de la Rubia, TD Victoria, M AF Khraishi, TA Zbib, HM de la Rubia, TD Victoria, M TI Modelling of irradiation-induced hardening in metals using dislocation dynamics SO PHILOSOPHICAL MAGAZINE LETTERS LA English DT Article ID PLASTIC-DEFORMATION; TENSILE PROPERTIES; SINGLE-CRYSTALS; STRESS-FIELD; BCC METALS; SIMULATION; FCC; DISPLACEMENT; ACCUMULATION; CASCADES AB A new simulation technique (three-dimensional dislocation dynamics) enabling the capture of a hardening effect in metals due to irradiation is reported. When bombarded with high-energy particles, metals accrue internal damage. In irradiated Pd, for example, damage takes the form of interstitial loops. Such loops are nano-sized and typically have a high number density. The stress field of a loop is given from dislocation theory. It is shown here the hardening is due to the elastic interaction of gliding dislocations with a high number or spatially dispersed interstitial loops. Results are found to correlate well with experiments. C1 Univ New Mexico, Dept Mech Engn, Albuquerque, NM 87131 USA. Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Ecole Polytech Fed Lausanne, Ctr Rech Phys Plasmas, CH-5232 Villigen, Switzerland. RP Khraishi, TA (reprint author), Univ New Mexico, Dept Mech Engn, Albuquerque, NM 87131 USA. NR 29 TC 16 Z9 16 U1 0 U2 3 PU TAYLOR & FRANCIS LTD PI LONDON PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND SN 0950-0839 J9 PHIL MAG LETT JI Philos. Mag. Lett. PD SEP PY 2001 VL 81 IS 9 BP 583 EP 593 DI 10.1080/09500830110069297 PG 11 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 471BA UT WOS:000170905900001 ER PT J AU Rhee, M Lassila, DH Bulatov, VV Hsiung, L de la Rubia, TD AF Rhee, M Lassila, DH Bulatov, VV Hsiung, L de la Rubia, TD TI Dislocation multiplication in bcc molybdenum: a dislocation dynamics simulation SO PHILOSOPHICAL MAGAZINE LETTERS LA English DT Article ID DEFORMATION; CRYSTALS; SLIP AB Plastic deformation of Mo single crystals is examined by direct simulation of dislocation dynamics under stress. Initial dislocation populations bare made to mimic real dislocation microstructures observed in transmission electron microscopy cross-sections of pure annealed Mo single crystals. No a priori sources for dislocation multiplication are introduced, and yet multiplication takes place through a sequence involving aggregation of grown-in superjogs, bowing of screw dislocation segments and fast lateral motion of edge segments, producing a large number of elongated loops and a characteristic cross-grid pattern of screw dislocations. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Rhee, M (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 18 TC 8 Z9 8 U1 0 U2 7 PU TAYLOR & FRANCIS LTD PI LONDON PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND SN 0950-0839 J9 PHIL MAG LETT JI Philos. Mag. Lett. PD SEP PY 2001 VL 81 IS 9 BP 595 EP 605 DI 10.1080/09500830110069594 PG 11 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 471BA UT WOS:000170905900002 ER PT J AU Soneda, N Ishino, S de la Rubia, TD AF Soneda, N Ishino, S de la Rubia, TD TI Vacancy loop formation by 'cascade collapse' in alpha-Fe: a molecular dynamics study of 50 keV cascades SO PHILOSOPHICAL MAGAZINE LETTERS LA English DT Article ID HEAVY-ION IRRADIATION; EMBEDDED ATOM METHOD; DISPLACEMENT CASCADES; DEFECT PRODUCTION; BCC METALS; COMPUTER-SIMULATION; ANNEALING KINETICS; TENSILE PROPERTIES; IRON; EVOLUTION AB Direct formation of a large vacancy loop by displacement cascade in alpha -Fe has been observed for the first time in a molecular dynamics (MD) computer simulation study. This phenomenon occurred in one anomalous run out of 100 simulations of 50 keV primary knock-on atom energy cascades, in which one large displacement cascade was produced instead of the formation of smaller subcascades. Two large self-interstitial atom clusters were produced at the periphery of the cascade core, followed by the formation of;a very high concentration region of vacancies at the centre of the cascade during the quenching of the thermal spike phase. Finally, one large vacancy loop with Burgers vector b = a(0) (100) was formed by cascade collapse. A very-low-probability, one hundredth or probably less, for vacancy loop formation in the present MD simulation is consistent with the experimental observation of a low defect yield in irradiated alpha -Fe. C1 Cent Res Inst Elect Power Ind, Komae, Tokyo 2018511, Japan. Tokai Univ, Hiratsuka, Kanagawa 2591292, Japan. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Soneda, N (reprint author), Cent Res Inst Elect Power Ind, 2-11-1 Iwato Kita, Komae, Tokyo 2018511, Japan. NR 23 TC 30 Z9 30 U1 2 U2 16 PU TAYLOR & FRANCIS LTD PI LONDON PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND SN 0950-0839 J9 PHIL MAG LETT JI Philos. Mag. Lett. PD SEP PY 2001 VL 81 IS 9 BP 649 EP 659 DI 10.1080/09500830110062799 PG 11 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 471BA UT WOS:000170905900008 ER PT J AU Koshelev, I Paulikas, AP Beno, M Jennings, G Linton, J Uran, S Veal, BW AF Koshelev, I Paulikas, AP Beno, M Jennings, G Linton, J Uran, S Veal, BW TI Characterization of the scale on oxidized Fe-Ni-Cr alloys using grazing emission X-ray fluorescence SO PHYSICA B LA English DT Article DE grazing emission X-ray fluorescence (GEXRF); oxide; chromia scale ID GROWN OXIDE SCALES; NUMERICAL INVERSION; LAPLACE TRANSFORM; STAINLESS-STEEL; OXIDATION; DEPLETION; CORROSION AB Grazing emission X-ray fluorescence (GEXRF. or refracted X-ray fluorescence - RXF) has been used to characterize the oxide scale (predominately chromia) which formed on an alloy of 55Fe-25Cr-20Ni (wt%) after oxidation for 4 h at 750 degreesC in O-2 Angle dependent X-ray emission spectra I(theta) were acquired for three elements, Cr, Fe and Ni. The measured data were fit by adjusting scale parameters in the calculated spectra such that I(theta) data were simultaneously fit for all three elements. It is shown that the calculated spectra are sensitive to scale thickness. to the Cr depletion zone that develops in the substrate at the scale-metal interface, and to the concentration of Fe and Ni atoms dissolved in the scale. The very demanding requirements imposed by simultaneously fitting all three measured I(theta) curves provide a satisfactory determination of these scale parameters. The GEXRF measurements showed that the scale was about 0.5 mum thick, with an underlying Cr depletion zone extending about 4 mum (midpoint) into the substrate. The average Cr concentration in this depletion zone was reduced from the preoxidized value of 25 to 22.2wt%. The scale contained about 2.4at% of Fe and less than 0.5at% Ni. These measurements demonstrate that GEXRF can, in a single nondestructive measurement. provide key information needed to characterize a thermally grown chromia scale. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Veal, BW (reprint author), Argonne Natl Lab, Div Mat Sci, MSD 223,9700 S Cass Ave, Argonne, IL 60439 USA. NR 13 TC 3 Z9 3 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD SEP PY 2001 VL 304 IS 1-4 BP 256 EP 266 DI 10.1016/S0921-4526(01)00557-9 PG 11 WC Physics, Condensed Matter SC Physics GA 465MC UT WOS:000170591900033 ER PT J AU Machida, M Koyama, T Tachiki, M AF Machida, M Koyama, T Tachiki, M TI Direct numerical experiments for electromagnetic wave emissions with collective Josephson vortex dynamics SO PHYSICA C LA English DT Article; Proceedings Paper CT International Symposium on Intrinsic Josephson Effects and Plasma Oscillation in High-Tc Syperconductors CY AUG 22-24, 2000 CL SENDAI, JAPAN DE intrinsic Josephson junction; flux motion; plasma; Sine-Gordon equation ID LAYERED SUPERCONDUCTORS; JUNCTIONS; VORTICES; BEHAVIOR AB We perform numerical simulations solving the coupled sine-Gordon equation for intrinsic Josephson junction and the Maxwell equation for the wave guide attached at a neighbor of junction sites in order to simulate actual emission process of electromagnetic wave caused by the Josephson vortex flow. The simulation results reveal that the power of emitted electromagnetic waves becomes the maximum at the highest resonant voltage estimated from the dispersion relations of the Josephson plasma modes of the system and the flowing vortex configuration is almost complete rectangular lattice at the maximum point. (C) 2001 Published by Elsevier Science B.V. C1 Argonne Natl Lab, Mat Sci Div MSD 223, Argonne, IL 60439 USA. Japan Atom Energy Res Inst, Meguro Ku, Tokyo 1530061, Japan. Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan. Natl Res Inst Met, Tsukuba, Ibaraki 3050047, Japan. RP Machida, M (reprint author), Argonne Natl Lab, Mat Sci Div MSD 223, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Koyama, Tomio/A-8135-2011 NR 11 TC 28 Z9 29 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD SEP PY 2001 VL 362 BP 16 EP 22 DI 10.1016/S0921-4534(01)00641-4 PG 7 WC Physics, Applied SC Physics GA 476HM UT WOS:000171220200004 ER PT J AU Helm, C Keller, J Preis, C Sergeev, A AF Helm, C Keller, J Preis, C Sergeev, A TI Static charge coupling of intrinsic Josephson junctions SO PHYSICA C LA English DT Article; Proceedings Paper CT International Symposium on Intrinsic Josephson Effects and Plasma Oscillation in High-Tc Syperconductors CY AUG 22-24, 2000 CL SENDAI, JAPAN DE layered superconductors; intrinsic Josephson effect; SN junction; Shapiro steps ID T-C SUPERCONDUCTORS; LAYERED SUPERCONDUCTORS; LINEAR-RESPONSE; SINGLE-CRYSTALS; OSCILLATIONS; BI2SR2CACU2O8+DELTA; DYNAMICS AB A microscopic theory for the coupling of intrinsic Josephson oscillations due to charge fluctuations on the quasi-two- dimensional superconducting layers is presented. Thereby in close analogy to the normal state the effect of the scalar potential on the transport current is taken into account consistently. The dispersion of collective modes is derived and an estimate of the coupling constant is given. It is shown that the correct treatment of the quasiparticle current is essential in order to get the correct position of Shapiro steps. In this case the influence of the coupling on de properties like the I-V curve is negligible. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Los Alamos Natl Lab, Div T11, Los Alamos, NM 87545 USA. Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany. Wayne State Univ, ECE Dept, Detroit, MI 48202 USA. RP Helm, C (reprint author), Los Alamos Natl Lab, Div T11, M-S B-262, Los Alamos, NM 87545 USA. NR 22 TC 18 Z9 18 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD SEP PY 2001 VL 362 BP 43 EP 50 DI 10.1016/S0921-4534(01)00645-1 PG 8 WC Physics, Applied SC Physics GA 476HM UT WOS:000171220200008 ER PT J AU Preis, C Helm, C Schmalzl, K Keller, J Kleiner, R Muller, P AF Preis, C Helm, C Schmalzl, K Keller, J Kleiner, R Muller, P TI Phonons in intrinsic Josephson systems with parallel magnetic field SO PHYSICA C LA English DT Article; Proceedings Paper CT International Symposium on Intrinsic Josephson Effects and Plasma Oscillation in High-Tc Syperconductors CY AUG 22-24, 2000 CL SENDAI, JAPAN DE Josephson systems; phonons; flux motion ID SUBGAP STRUCTURES; LAYERED SUPERCONDUCTORS; SINGLE-CRYSTALS; JUNCTIONS; TL2BA2CA2CU3O10+DELTA; BI2SR2CACU2O8+DELTA; OSCILLATIONS AB Subgap resonances in the I-V curves of layered superconductors are explained by the coupling between Josephson oscillations and phonons with dispersion in c-direction. In the presence of a magnetic field applied parallel to the layers additional structures due to fluxon motion appear. Their coupling with phonons is investigated theoretically and a shift of the phonon resonances in strong magnetic fields is predicted. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Tubingen, Inst Phys, D-72076 Tubingen, Germany. Univ Erlangen Nurnberg, Inst Phys 3, D-91058 Erlangen, Germany. RP Keller, J (reprint author), Univ Regensburg, Inst Theoret Phys, Univ Str 31, D-93040 Regensburg, Germany. RI Muller, Paul/H-2179-2013 NR 16 TC 11 Z9 11 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD SEP PY 2001 VL 362 BP 51 EP 57 DI 10.1016/S0921-4534(01)00646-3 PG 7 WC Physics, Applied SC Physics GA 476HM UT WOS:000171220200009 ER PT J AU Latyshev, YI Kim, SJ Pavlenko, VN Yamashita, T Bulaevskii, LN AF Latyshev, YI Kim, SJ Pavlenko, VN Yamashita, T Bulaevskii, LN TI Interlayer tunneling of quasiparticles and Cooper pairs in Bi-2212 from experiments on small stacks SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS LA English DT Article; Proceedings Paper CT International Symposium on Intrinsic Josephson Effects and Plasma Oscillation in High-Tc Superconductors CY AUG 22-24, 2000 CL SENDAI, JAPAN DE interlayer tunneling coherency; gap symmetry; pseudogap; charging effects ID SUPERCONDUCTING GAP; JUNCTION STACKS; BI2SR2CACU2O8+DELTA; PSEUDOGAP; WHISKERS AB The interlayer tunneling has been studied on high quality Bi-2212 stacks of micron to the submicron lateral size. We found that low temperature and low voltage tunneling I-V characteristics can be self-consistently described by Fermi-liquid model for a d-wave superconductor with a, significant contribution from coherent interlayer tunneling. For micron-sized stacks we found very clear Fraunhofer type dependence of critical current across the stack on parallel magnetic field with periodicity corresponding to one flux quantum per elementary junction. The gap and pseudogap interplay with variation of temperature and magnetic field has been extracted from the I-V characteristics. We consider also the role of charging effects for submicron stacks. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Tohoku Univ, Elect Commun Res Inst, Aoba Ku, Sendai, Miyagi 9808577, Japan. Russian Acad Sci, Inst Radioengn & Elect, Moscow 101999, Russia. Japan Sci & Technol Corp, CREST, Tsukuba, Ibaraki, Japan. Los Alamos Natl Lab, Div Theory, Los Alamos, NM 87545 USA. RP Latyshev, YI (reprint author), Russian Acad Sci, Inst Radio Engn & Elect, 11 Mokhovaya St, Moscow 103907, Russia. EM lat@mail.cplire.ru NR 30 TC 21 Z9 21 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD SEP PY 2001 VL 362 BP 156 EP 163 DI 10.1016/S0921-4534(01)00663-3 PG 8 WC Physics, Applied SC Physics GA 476HM UT WOS:000171220200026 ER PT J AU Beiersdorfer, P Utter, SB Wong, KL Lopez-Urrutia, JRC Britten, JA Chen, H Harris, CL Thoe, RS Thorn, DB Trabert, E AF Beiersdorfer, P Utter, SB Wong, KL Lopez-Urrutia, JRC Britten, JA Chen, H Harris, CL Thoe, RS Thorn, DB Trabert, E TI Hyperfine structure of hydrogenlike thallium isotopes SO PHYSICAL REVIEW A LA English DT Article ID ELASTIC ELECTRON-SCATTERING; BEAM ION-TRAP; GROUND-STATE; TRANSITION; MOMENTS AB The hyperfine splitting of the 1s ground state of hydrogenlike T1 has been measured for the two stable isotopes using emission spectroscopy in the SuperEBIT electron-beam ion trap, giving 3858.22 +/-0.30 Angstrom for Tl-203(80+) and 3821.84 +/-0.34 Angstrom for Tl-205(80+) with a wavelength difference Delta lambda =36.38 +/-0.35 Angstrom. This difference is consistent with estimates based on hyperfine anomaly data for neutral T1 only if finite size effects are included in the calculation. By using previously determined nuclear magnetic moments, and applying appropriate corrections for the nuclear charge distribution and radiative effects, the experimental splittings can be interpreted in terms of nuclear magnetization radii (1/2)=5.83(14) fm for Tl-203 and (1/2) = 5.89(14) fm for Tl-205. These values are 10% larger than derived from single-particle nuclear magnetization models, and are slightly larger than the corresponding charge distributions. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Gothenburg, SE-41296 Gothenburg, Sweden. Chalmers Univ Technol, SE-41296 Gothenburg, Sweden. Ruhr Univ Bochum, Fak Phys & Astron, D-4630 Bochum, Germany. Univ Liege, IPNAS, B-4000 Liege, Belgium. Univ Nevada, Dept Phys, Reno, NV 89557 USA. RP Beiersdorfer, P (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RI Forssen, Christian/C-6093-2008; Crespo Lopez-Urrutia, Jose R./F-7069-2011 OI Forssen, Christian/0000-0003-3458-0480; Crespo Lopez-Urrutia, Jose R./0000-0002-2937-8037 NR 34 TC 66 Z9 67 U1 0 U2 4 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 SEP PY 2001 VL 64 IS 3 AR 032506 DI 10.1103/PhysRevA.64.032506 PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 472HT UT WOS:000170978600044 ER PT J AU Beiersdorfer, P von Goeler, S Bitter, M Thorn, DB AF Beiersdorfer, P von Goeler, S Bitter, M Thorn, DB TI Measurement of the 3d -> 2p resonance to intercombination line-intensity ratio in neonlike Fe XVII, Ge XXIII, and Se XXV SO PHYSICAL REVIEW A LA English DT Article ID ALCATOR-C TOKAMAK; X-RAY-SPECTRA; OSCILLATOR-STRENGTHS; COLLISION STRENGTHS; ATOMIC DATA; SATELLITE SPECTRA; ACTIVE-REGION; KR-XXVII; IONS; HELIUMLIKE AB Measurements of the 3d --> 2p resonance and intercombination lines were made on the PLT tokamak for the neonlike ions Fe XVII, Ge XXIII, and Se XXV at several electron temperatures. The observed ratios agree with measurements of the ratios of the electron-impact excitation cross sections measured at the Livermore EBIT-II electron beam ion trap indicating that the effects of indirect excitation processes active in a plasma environment are minor for this line pair. However, the measured ratios are significantly smaller than theoretical predictions of their relative oscillator strengths or electron-impact excitation rates, illustrating the need to use laboratory measurements to calibrate this line pair at the level necessary for spectral diagnostics. C1 Univ Calif Lawrence Livermore Natl Lab, Dept Phys & Adv Technol, Livermore, CA 94551 USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Beiersdorfer, P (reprint author), Univ Calif Lawrence Livermore Natl Lab, Dept Phys & Adv Technol, Livermore, CA 94551 USA. NR 42 TC 28 Z9 28 U1 1 U2 5 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 SEP PY 2001 VL 64 IS 3 AR 032705 DI 10.1103/PhysRevA.64.032705 PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 472HT UT WOS:000170978600050 ER PT J AU Mezei, JZ Mitroy, J Lovas, RG Varga, K AF Mezei, JZ Mitroy, J Lovas, RG Varga, K TI Properties of some exotic five-particle systems SO PHYSICAL REVIEW A LA English DT Article ID QUANTUM MONTE-CARLO; POSITRONIUM HYDRIDE; GROUND-STATE; STABILITY; COMPLEXES AB The stability of a number of exotic systems consisting of N=5 unit charge particles is investigated using the stochastic variational method. Several interesting exotic molecules are found to be stable. The properties of the are investigated most intriguing systems consisting of two electrons and two positrons (e.g., e(+) PsH or Li+ Ps(2) ) in great detail. C1 Hungarian Acad Sci, Inst Nucl Res, ATOMKI, H-4000 Debrecen, Hungary. No Terr Univ, Fac Sci, Casuarina, NT 0909, Australia. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37830 USA. RP Mezei, JZ (reprint author), Hungarian Acad Sci, Inst Nucl Res, ATOMKI, POB 51, H-4000 Debrecen, Hungary. RI Mitroy, Jim/B-6371-2009; Varga, Kalman/A-7102-2013; Mitroy, James/N-2162-2013 OI Mitroy, James/0000-0002-2477-1251 NR 35 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 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD SEP PY 2001 VL 64 IS 3 AR 032501 DI 10.1103/PhysRevA.64.032501 PG 10 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 472HT UT WOS:000170978600039 ER PT J AU Moller, SP Biryukov, V Datz, S Grafstrom, P Knudsen, H Krause, HF Scheidenberger, C Uggerhoj, UI Vane, CR AF Moller, SP Biryukov, V Datz, S Grafstrom, P Knudsen, H Krause, HF Scheidenberger, C Uggerhoj, UI Vane, CR TI Random and channeled energy loss of 33.2-TeV Pb nuclei in silicon single crystals SO PHYSICAL REVIEW A LA English DT Article ID HEAVY-IONS AB Measurements of the energy loss and the energy-loss distributions of 160 GeV/amu fully stripped lead ions traversing a silicon single crystal are presented. The energy loss is measured using the silicon crystal as an intrinsic detector. Hence the measured energy loss is a restricted energy loss excluding very large energy transfers. For random incidence, the observed energy-loss distributions are very narrow and Gaussian-like. For well-channeled particles, the energy loss is strongly reduced as compared to so-called random particles. The observed energy loss is compared to calculations as well as simulations. Due to the small straggling, the energy-loss distributions are reflecting directly the distribution in transverse energy. C1 Aarhus Univ, Inst Storage Ring Facil, DK-8000 Aarhus C, Denmark. Inst High Energy Phys, Beam Dept, Protvino 142284, Moscow Region, Russia. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. CERN, CH-1211 Geneva 23, Switzerland. Aarhus Univ, Inst Phys & Astron, DK-8000 Aarhus C, Denmark. Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany. RP Moller, SP (reprint author), Aarhus Univ, Inst Storage Ring Facil, DK-8000 Aarhus C, Denmark. EM FYSSP@IFA.AU.DK RI Uggerhoj, Ulrik/A-1802-2012 OI Uggerhoj, Ulrik/0000-0002-8229-1512 NR 9 TC 8 Z9 8 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD SEP PY 2001 VL 64 IS 3 AR 032902 DI 10.1103/PhysRevA.64.032902 PG 5 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 472HT UT WOS:000170978600067 ER PT J AU Munro, WJ James, DFV White, AG Kwiat, PG AF Munro, WJ James, DFV White, AG Kwiat, PG TI Maximizing the entanglement of two mixed qubits SO PHYSICAL REVIEW A LA English DT Article ID PODOLSKY-ROSEN CHANNELS; QUANTUM CRYPTOGRAPHY; EXPERIMENTAL REALIZATION; BELL INEQUALITIES; SEPARABLE STATES; PHOTONS; COMPUTATION; VOLUME; SET AB Two-qubit states occupy a large and relatively unexplored Hilbert space. Such states can be succinctly characterized by their degree of entanglement and purity. In this article we investigate entangled mixed states and present a class of states that have the maximum amount of entanglement for a given linear entropy. C1 Univ Queensland, Special Res Ctr Quantum Comp Technol, Brisbane, Qld, Australia. Hewlett Packard Labs, Bristol BS34 8QZ, Avon, England. Univ Calif Los Alamos Natl Lab, Div Theory, Los Alamos, NM 87544 USA. Univ Illinois, Dept Phys, Urbana, IL 61801 USA. RP Munro, WJ (reprint author), Univ Queensland, Special Res Ctr Quantum Comp Technol, Brisbane, Qld, Australia. EM bill_munro@hp.com RI James, Daniel/B-9805-2009; White, Andrew/A-1088-2009; Munro, William/A-8453-2011 OI James, Daniel/0000-0003-3981-4602; White, Andrew/0000-0001-9639-5200; Munro, William/0000-0003-1835-2250 NR 34 TC 188 Z9 197 U1 5 U2 11 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 SEP PY 2001 VL 64 IS 3 AR 030302 DI 10.1103/PhysRevA.64.030302 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 472HT UT WOS:000170978600002 ER PT J AU Nesbet, RK Mazevet, S Morrison, MA AF Nesbet, RK Mazevet, S Morrison, MA TI Procedure for correcting variational R-matrix calculations for polarization response SO PHYSICAL REVIEW A LA English DT Article ID ELECTRON-MOLECULE-SCATTERING; DIFFERENTIAL CROSS-SECTIONS; VIBRATIONAL-EXCITATION; CO2; APPROXIMATION; COLLISIONS; EQUATIONS; PROGRAM; IMPACT; NUCLEI AB Using standard bound-state methodology, variational calculations of molecular R matrices can severely underestimate polarization response in the near-target region inside the R-matrix boundary. An "DeltaR" procedure is proposed here as an easily implemented but significant improvement of such R matrices. The efficacy of this procedure is demonstrated in calculations of differential and integral cross sections for vibrationally elastic e-CO2 scattering at and below 1 eV. C1 IBM Corp, Almaden Res Ctr, San Jose, CA 95120 USA. Univ Calif Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Oklahoma, Dept Phys & Astron, Norman, OK 73019 USA. RP Morrison, MA (reprint author), IBM Corp, Almaden Res Ctr, 650 Harry Rd, San Jose, CA 95120 USA. EM morrison@mail.nhn.ou.edu NR 28 TC 3 Z9 3 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 SEP PY 2001 VL 64 IS 3 AR 034702 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 472HT UT WOS:000170978600128 ER PT J AU Trabert, E Beiersdorfer, P Brown, GV Chen, H Pinnington, EH Thorn, DB AF Trabert, E Beiersdorfer, P Brown, GV Chen, H Pinnington, EH Thorn, DB TI Experimental M1 transition rates in KXI, KXV, and KXVI SO PHYSICAL REVIEW A LA English DT Article ID BEAM ION-TRAP; BERYLLIUM ISOELECTRONIC SEQUENCE; MAGNETIC DIPOLE TRANSITION; DIRAC-FOCK CALCULATION; MEASURED LIFETIMES; FORBIDDEN; LINES; EBIT AB Transition probabilities of three magnetic dipole (M1) transitions in multiply charged ions of potassium have been measured using the Livermore electron beam ion trap EBIT-2. Our results for the atomic level lifetimes are 4.44 +/- 0.10 ms for K XI (F-like) 2s(2) 2p(5) P-2(1/2)o, 4.47 +/- 0.10 ms for K xv (B-like) 2s(2) 2P P-2(3/2)o and 7.6 +/- 0.5 ms for K XVI (Be-like) 2s2p P-3(2)n. The results confirm the accuracy of most predictions to within 3% of ground-state and 7% of excited-state transitions. C1 Univ Calif Lawrence Livermore Natl Lab, Dept Phys & Space Technol, Livermore, CA 94550 USA. Univ Liege, IPNAS, B-4000 Liege, Belgium. Ruhr Univ Bochum, Fak Phys & Astron, D-44780 Bochum, Germany. Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada. RP Trabert, E (reprint author), Univ Calif Lawrence Livermore Natl Lab, Dept Phys & Space Technol, Livermore, CA 94550 USA. EM traebert@ep3.ruhr-uni-bochum.de NR 22 TC 29 Z9 29 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD SEP PY 2001 VL 64 IS 3 AR 034501 DI 10.1103/PhysRevA.64.034501 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 472HT UT WOS:000170978600126 ER PT J AU Zhang, HL Nahar, SN Pradhan, AK AF Zhang, HL Nahar, SN Pradhan, AK TI Relativistic close-coupling calculations for photoionization and recombination of Ne-like Fe XVII SO PHYSICAL REVIEW A LA English DT Article ID ELECTRON-ION RECOMBINATION; ATOMIC DATA; DIELECTRONIC RECOMBINATION; OSCILLATOR-STRENGTHS; CROSS-SECTIONS; IRON PROJECT; SEQUENCE AB Relativistic and channel coupling effects in photoionization and unified electronic recombination of Fe XVII are demonstrated with an extensive 60-level close-coupling calculation using the Breit-Pauli R-matrix method. A multiconfiguration eigenfunction expansion up to the n = 3 levels of the core ion Fe XVIII is employed with five spectroscopic configurations 2s(2)2p(5), 2s2p(6), 2s(2)2p(4) 3s,3p,3d, and a number of correlation configurations. The unified e + ion recombination calculations for e + Fe XVIII-->Fe XVII include both the nonresonant and resonant recombination ("radiative" and "dielectronic recombination"-RR and DR). Photoionization and e + ion recombination calculations are carried out for the total and the level-specific cross sections, including the ground and several hundred excited bound levels of Fe XVII (up to fine-structure levels with n = 10). The low-energy and the high-energy cross sections are compared from (i) a three-level calculation including only the 2s(2)p(5) (2p(1/2,3/2)(o)) and 2s2p(6) (S-2(1/2)) levels of Fe XVIII, and (ii) the first 60-level calculation with Deltan > 0 coupled channels. Strong channel coupling effects are demonstrated throughout the energy ranges considered, in particular via giant photoexcitation-of-core (PEC) resonances due to L-M shell dipole transition arrays 2p(5)-->2p4 3s, 3d in Fe XIII that enhance effective cross sections by orders of magnitude. Comparison is made with previous theoretical and experimental works on photoionization and recombination that considered the relatively small low-energy region (i), and the weaker Deltan = 0 couplings. While the simpler three-level results describe the near-threshold photoionization and recombination, they are inadequate for practical applications that also require the higher-energy cross sections for modeling ionization balance of Fe XVII in laboratory and astrophysical plasmas. The present 60-level results should provide reasonably complete and accurate datasets for both photoionization and e + ion recombination of Fe XVII. C1 Univ Calif Los Alamos Natl Lab, Appl Theoret & Computat Phys Div, Los Alamos, NM 87545 USA. Ohio State Univ, Dept Astron, Columbus, OH 43210 USA. RP Zhang, HL (reprint author), Univ Calif Los Alamos Natl Lab, Appl Theoret & Computat Phys Div, POB 1663, Los Alamos, NM 87545 USA. NR 33 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 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD SEP PY 2001 VL 64 IS 3 AR 032719 PG 12 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 472HT UT WOS:000170978600064 ER PT J AU Abrikosov, AA AF Abrikosov, AA TI Properties of the pseudogap phase in high-T-c superconductors SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; SADDLE-POINT MODEL; FERMI-SURFACE; NORMAL-STATE; GAP; BI2SR2CACU2O8+DELTA; FLUCTUATIONS AB Several physical properties of the pseudogap phase are calculated on the basis of the spatially inhomogenous Franz-Millis model of superconducting fluctuations, consisting of small superconducting domains with uncorrelated supercurrents. The variation of this domain structure with time is supposed to be slow. A distribution function of superfluid velocities is found based on the assumption of the dominant role of extended saddle point singularities ("hot spots"). The model is used for calculation of the spectral function, the inelastic neutron scattering cross section, and the spin susceptibility entering the Knight shift. In all cases the calculated curves are qualitatively close to experimental results. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Abrikosov, AA (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 23 TC 20 Z9 21 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 SEP 1 PY 2001 VL 64 IS 10 AR 104521 DI 10.1103/PhysRevB.64.104521 PG 10 WC Physics, Condensed Matter SC Physics GA 472HQ UT WOS:000170978400092 ER PT J AU Akerman, JJ Venturini, EL Siegal, MP Yun, SH Karlsson, UO Rao, KV AF Akerman, JJ Venturini, EL Siegal, MP Yun, SH Karlsson, UO Rao, KV TI Two-stage crossover from thermal to quantum flux creep of dilute vortex ensembles in various high-T-c superconducting thin films SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNETIC-RELAXATION; SINGLE-CRYSTAL; II SUPERCONDUCTORS; AC SUSCEPTIBILITY; BULK SUPERCONDUCTORS; COLLECTIVE CREEP; COLUMNAR DEFECTS; CURRENT-DENSITY; VORTICES AB The thermal-to-quantum flux creep crossover at low vortex densities has been studied in YBa2Cu3O7, TlBa2CaCu2O7-delta, and HgBa2CaCu2O6+delta thin films using ac susceptibility. The crossover temperatures T-cr are 10-11, 17, and 30 K, respectively. Both thermal and quantum flux creep is suppressed as the vortex density is decreased. We observe a two-stage nature in the crossover behavior which appears to be a general property of all the three materials studied. C1 Royal Inst Technol, Dept Mat Sci Tmfy MSE, S-10044 Stockholm, Sweden. Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. Royal Inst Technol, Dept Mat Phys, S-10044 Stockholm, Sweden. RP Akerman, JJ (reprint author), Royal Inst Technol, Dept Mat Sci Tmfy MSE, S-10044 Stockholm, Sweden. RI Akerman, Johan/B-5726-2008; Rao, K.V./F-4577-2011 OI Akerman, Johan/0000-0002-3513-6608; NR 64 TC 4 Z9 4 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 2001 VL 64 IS 9 AR 094509 PG 5 WC Physics, Condensed Matter SC Physics GA 467WD UT WOS:000170726000100 ER PT J AU Asta, M Ozolins, V AF Asta, M Ozolins, V TI Structural, vibrational, and thermodynamic properties of Al-Sc alloys and intermetallic compounds SO PHYSICAL REVIEW B LA English DT Article ID TOTAL-ENERGY CALCULATIONS; TRANSITION-METAL ALUMINIDES; INITIO MOLECULAR-DYNAMICS; WAVE BASIS-SET; ELECTRONIC-STRUCTURE; PHASE-STABILITY; DISORDERED NI3AL; 1ST-PRINCIPLES CALCULATIONS; SOLID SOLUBILITY; SPECIAL POINTS AB We present results of a theoretical study of the temperature-dependent structural and thermodynamic properties of solid-phase Al-Sc alloys and compounds based upon first-principles calculations of electronic free energies and ionic vibrational spectra. This work extends a previous first-principles study of the fcc portion of the Al-Sc phase diagram which demonstrated a large effect of vibrational free energy upon calculated Sc solid-solubility limits [V. Ozolins and M. Asta, Phys. Rev. Lett. 86, 448 (2001)]. Here the contributions of nonconfigurational (electronic and vibrational) entropies to the free energies of solid-phase Al-Sc alloys and compounds are analyzed in further detail, and the accuracy of the approximations employed in these calculations is assessed. For each of the reported inter-metallic compounds in this system, calculated formation enthalpies agree to within 10% (0.05 eV/atom) of published calorimetry measurements. Large negative entropies of formation, equal to -0.77k(B) /atom. -0.58k(B)/atom, and -0.24k(B)/atom are calculated for cubic Al3Sc, cubic AlSc, and orthorhombic AlSc compounds, respectively, resulting primarily from the stiffening of nearest-neighbor Al-Sc bonds in the intermetallic phases relative to elemental Al and Sc. The net effects of nonconfigurational free energy contributions to the fcc portion of the Al-Sc phase diagram are 100 and 450 K decreases in the calculated Al solvus phase boundary temperatures associated with electronic and vibrational entropy, respectively, at the maximum measured Sc solid-solubility limit. C1 Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA. Sandia Natl Labs, Livermore, CA 94551 USA. RP Asta, M (reprint author), Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA. RI Ozolins, Vidvuds/D-4578-2009 NR 78 TC 58 Z9 60 U1 5 U2 18 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 2001 VL 64 IS 9 AR 094104 DI 10.1103/PhysRevB.64.094104 PG 14 WC Physics, Condensed Matter SC Physics GA 467WD UT WOS:000170726000037 ER PT J AU Belashchenko, KD van Schilfgaarde, M Antropov, VP AF Belashchenko, KD van Schilfgaarde, M Antropov, VP TI Coexistence of covalent and metallic bonding in the boron intercalation superconductor MgB2 SO PHYSICAL REVIEW B LA English DT Article ID GRAPHITE AB Chemical bonding and electronic structure of MgB2, a boron-based newly discovered superconductor, is studied using self-consistent band-structure techniques. Analysis of the transformation of the band structure for the hypothetical series of graphite-primitive graphite-primitive graphitelike boron-intercalated boron, shows that the band structure of MgB2 is graphitelike, with pi bands falling deeper than in ordinary graphite. These bands possess a typically delocalized and metallic, as opposed to covalent, character. The in-plane sigma bands retain their two-dimensional (2D) covalent character, but exhibit a metallic hole-type conductivity. The coexistence of 2D covalent in-plane and three-dimensional (3D) metallic-type interlayer conducting bands is a peculiar feature of MgB2 We analyze the 2D and 3D features of the band structure of MgB2 and related compounds, and their contributions to conductivity. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Sandia Natl Labs, Livermore, CA 94551 USA. RP Belashchenko, KD (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. RI Belashchenko, Kirill/A-9744-2008 OI Belashchenko, Kirill/0000-0002-8518-1490 NR 17 TC 106 Z9 107 U1 1 U2 5 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 SEP 1 PY 2001 VL 64 IS 9 AR 092503 DI 10.1103/PhysRevB.64.092503 PG 4 WC Physics, Condensed Matter SC Physics GA 467WD UT WOS:000170726000023 ER PT J AU Bonca, J Trugman, SA AF Bonca, J Trugman, SA TI Bipolarons in the extended Holstein hubbard model SO PHYSICAL REVIEW B LA English DT Article ID POLARON FORMATION AB We numerically and analytically calculate the properties of the bipolaron in an extended Hubbard-Holstein model, which has a longer-ran-ge electron-phonon coupling like the Frohlich model. In the strong-coupling regime, the effective mass of the bipolaron in the extended model is much smaller than the Holstein bipolaron mass. In contrast to the Holstein bipolaron, the bipolaron in the extended model has a lower binding energy and remains bound with substantial binding energy even in the large-U limit. In comparison with the Holstein model where only a singlet bipolaron is bound, in the extended Holstein model a triplet bipolaron can also form a bound state. We discuss the possibility of phase separation in the case of finite electron doping. C1 Univ Ljubljana, FMF, Ljubljana 1000, Slovenia. Jozef Stefan Inst, Ljubljana 1000, Slovenia. Los Alamos Natl Lab, Div Theory, Los Alamos, NM 87545 USA. RP Bonca, J (reprint author), Univ Ljubljana, FMF, Ljubljana 1000, Slovenia. NR 14 TC 68 Z9 68 U1 1 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 2001 VL 64 IS 9 AR 094507 DI 10.1103/PhysRevB.64.094507 PG 4 WC Physics, Condensed Matter SC Physics GA 467WD UT WOS:000170726000098 ER PT J AU Bourdarot, F Lynn, JW Baggio-Saitovitch, E Huang, Q Sanchez, DR Skanthakumar, S AF Bourdarot, F Lynn, JW Baggio-Saitovitch, E Huang, Q Sanchez, DR Skanthakumar, S TI Magnetic behavior of the rare-earth compounds RNiBC by neutron scattering SO PHYSICAL REVIEW B LA English DT Article ID MOSSBAUER-SPECTROSCOPY; CRYSTAL-STRUCTURE; SUPERCONDUCTIVITY; ORDER; YBNIBC; HONIBC; IONS AB Neutron diffraction and small angle neutron scattering measurements have been carried out on RNiBC (R=Er, Th, Dy) to investigate the crystallography, magnetic correlations, and long range magnetic ordering. Crystallographic refinements show a strong boron-carbon and nickel-carbon bonding similar to RNiZB2C, but the rare-earth-carbon plane exhibits a buckling which does not exist in the RNi2B2C series. The magnetism in the RNiBC series is quite simple, with a magnetic moment direction going from the a-b plane to the c axis as the atomic number of the rare-earth increases. Er becomes ferromagnetic at T-C= 4.6 K, with a saturated moment of 7.2 mu (B) along the c axis. Th orders ferromagnetically at T-C= 15 K. Below 12.5 K an incommensurate modulation develops with a modulation wave vector of (0 0 1/8), as well as an antiferromagnetic component with k= (0 0 1/2). The moments, which vary in both magnitude and direction, are in the a-b plane with an average value of 7.79 mu (B). DyNiBC exhibits the same behavior, with a T-C and T-N of 17.5 and 13.5 K, respectively. C1 NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA. CEA Grenoble, SPSMS,MDN, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble 9, France. Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, Brazil. Univ Maryland, College Pk, MD 20742 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Bourdarot, F (reprint author), NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA. RI Candela, Dalber/G-3636-2012; Saitovitch, Elisa/A-6769-2015 NR 22 TC 7 Z9 7 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 SEP 1 PY 2001 VL 64 IS 10 AR 104410 DI 10.1103/PhysRevB.64.104410 PG 12 WC Physics, Condensed Matter SC Physics GA 472HQ UT WOS:000170978400047 ER PT J AU Casa, D Keimer, B von Zimmermann, M Hill, JP Habermeier, HU Razavi, FS AF Casa, D Keimer, B von Zimmermann, M Hill, JP Habermeier, HU Razavi, FS TI Unusual x-ray transport phenomena in La1-xSrxMnO3 SO PHYSICAL REVIEW B LA English DT Article ID METAL-INSULATOR-TRANSITION; STRUCTURAL TRANSITION; THIN-FILMS; CHARGE; MANGANITES; INTERPLAY; PHASE; LA0.875SR0.125MNO3; MAGNETORESISTANCE; ORDER AB An interesting memory effect occurs when La1-xSrxMnO3 (x similar to 1/8) is repeatedly exposed to x rays. While the "dark" conductivity remains unaffected by the irradiation history, the conductivity is markedly enhanced upon exposure to x rays at low temperatures. Immediately after renewed exposure, it recovers the value attained at the end of the previous exposure. We provide a qualitative explanation of this unusual effect in terms of three distinct states with different orbital correlations. C1 Princeton Univ, Dept Phys, Princeton, NJ 08544 USA. Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Brock Univ, Dept Phys, St Catharines, ON L2S 3A1, Canada. RP Casa, D (reprint author), Argonne Natl Lab, Adv Photon Source, CMC, CAT, Argonne, IL 60439 USA. RI Casa, Diego/F-9060-2016 NR 24 TC 17 Z9 17 U1 0 U2 4 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 SEP 1 PY 2001 VL 64 IS 10 AR 100404 DI 10.1103/PhysRevB.64.100404 PG 4 WC Physics, Condensed Matter SC Physics GA 472HQ UT WOS:000170978400008 ER PT J AU Cimpoiasu, E Levin, GA Almasan, CC Paulikas, AR Veal, BW AF Cimpoiasu, E Levin, GA Almasan, CC Paulikas, AR Veal, BW TI Magnetotransport mechanisms in strongly underdoped YBa2Cu3Ox single crystals SO PHYSICAL REVIEW B LA English DT Article ID OF-PLANE MAGNETORESISTANCE; RESISTIVITY; INPLANE AB We report magnetoresistivity measurements on strongly underdoped YBa2Cu3Ox (x = 6.25 and 6.36) single crystals in applied magnetic fields H parallel toc axis. We identify two different contributions to both in-plane Delta rho (ab)/rho (ab) and out-of-plane Delta rho (c)/rho (c) magnetoresistivities. The first contribution has the same sign as the temperature coefficient of the resistivity partial derivative ln rho (i)/partial derivativeT (i={c,ab}). This contribution reflects the incoherent nature of the out-of-plane transport. The second contribution is positive, quadratic in field, with an onset temperature that correlates to the antiferromagnetic ordering. C1 Kent State Univ, Dept Phys, Kent, OH 44242 USA. Kent State Univ, Dept Phys, Kent, OH 44242 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Cimpoiasu, E (reprint author), Kent State Univ, Dept Phys, Kent, OH 44242 USA. NR 16 TC 0 Z9 0 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 SEP 1 PY 2001 VL 64 IS 10 AR 104514 PG 4 WC Physics, Condensed Matter SC Physics GA 472HQ UT WOS:000170978400085 ER PT J AU Crowhurst, JC Abramson, EH Slutsky, LJ Brown, JM Zaug, JM Harrell, MD AF Crowhurst, JC Abramson, EH Slutsky, LJ Brown, JM Zaug, JM Harrell, MD TI Surface acoustic waves in the diamond anvil cell: An application of impulsive stimulated light scattering SO PHYSICAL REVIEW B LA English DT Article ID BRILLOUIN-SCATTERING; FORCES AB Impulsive stimulated light scattering (ISS) has been used to probe the pressure dependence of the surface acoustic waves supported at the interfaces formed by single crystals of Ge and Ta in contact with the pressure-transmitting media liquid methanol and solid Ar, respectively. In the former system, the relevant excitation is a Scholte wave; its velocity has been measured as function of direction in the crystal surface to a pressure of 2.2 GPa. In the latter system, the velocity of the Stoneley wave has been measured in the same way to a pressure of 7.7 GPa. In both cases, calculated velocities, obtained by evaluating the surface perpendicular elastodynamic Green's function, agree closely with measured velocities. When combined with additional information, such as the bulk modulus, these type of measurements provide a means to precisely determine the high pressure behavior of the individual elastic constants of opaque materials. C1 Univ Washington, Dept Chem, Seattle, WA 98195 USA. Univ Washington, Geophys Program, Seattle, WA 98195 USA. Univ Calif Lawrence Livermore Natl Lab, Livermore, CA 95441 USA. Univ Washington, Dept Geol Sci, Seattle, WA 98195 USA. RP Crowhurst, JC (reprint author), Univ Washington, Dept Chem, Seattle, WA 98195 USA. NR 10 TC 2 Z9 2 U1 0 U2 6 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 SEP 1 PY 2001 VL 64 IS 10 AR 100103 PG 4 WC Physics, Condensed Matter SC Physics GA 472HQ UT WOS:000170978400003 ER PT J AU Fitzsimmons, MR Leighton, C Hoffmann, A Yashar, PC Nogues, J Liu, K Majkrzak, CF Dura, JA Fritzsche, H Schuller, IK AF Fitzsimmons, MR Leighton, C Hoffmann, A Yashar, PC Nogues, J Liu, K Majkrzak, CF Dura, JA Fritzsche, H Schuller, IK TI Influence of interfacial disorder and temperature on magnetization reversal in exchange-coupled bilayers SO PHYSICAL REVIEW B LA English DT Article ID UNIDIRECTIONAL ANISOTROPY; THIN-FILMS; BIAS; SYSTEMS; MODEL; MULTILAYERS; DEPENDENCE; COERCIVITY; STATE AB Polarized neutron reflectometry is used to measure the thermal response of the net-magnetization vector of polycrystalline ferromagnetic (F) Fe films exchange coupled to twinned (110) MnF2 antiferromagnetic (AF) layers. We observe a strong correlation between the temperature dependencies of the net sample magnetization perpendicular to the applied field at coercivity and exchange bias. For cooling field and measurement conditions involving magnetization reversal via rotation, we find a range of temperature dependencies. For the smoothest F-AF interface, the temperature dependence of exchange bias compares well to a S=5/2 Brillouin function-an observation predicted by some theoretical models. This temperature dependence is expected for the sublattice magnetization and,the square root of the anisotropy constant rootK(1) of bulk MnF2. In contrast, for a rough F-A-F interface the magnetization reversal process (and exchange bias) showed little temperature dependence up to temperatures approaching the AF Neel point-a clear consequence of increasing interfacial disorder in a F-AF epitaxial system. C1 Univ Calif Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA. Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Spain. NIST, Gaithersburg, MD 20899 USA. Hahn Meitner Inst Kernforsch Berlin GmbH, D-1000 Berlin, Germany. RP Leighton, C (reprint author), Univ Calif Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Dura, Joseph/B-8452-2008; Liu, Kai/B-1163-2008; Nogues, Josep/D-7791-2012; Lujan Center, LANL/G-4896-2012; Hoffmann, Axel/A-8152-2009; OI Dura, Joseph/0000-0001-6877-959X; Liu, Kai/0000-0001-9413-6782; Nogues, Josep/0000-0003-4616-1371; Hoffmann, Axel/0000-0002-1808-2767; Fritzsche, Helmut/0000-0001-5288-8302 NR 40 TC 25 Z9 25 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 SEP 1 PY 2001 VL 64 IS 10 AR 104415 DI 10.1103/PhysRevB.64.104415 PG 5 WC Physics, Condensed Matter SC Physics GA 472HQ UT WOS:000170978400052 ER PT J AU Furukawa, Y Watanabe, K Kumagai, K Borsa, F Gatteschi, D AF Furukawa, Y Watanabe, K Kumagai, K Borsa, F Gatteschi, D TI Magnetic structure and spin dynamics of the ground state of the molecular cluster Mn12O12 acetate studied by Mn-55 NMR SO PHYSICAL REVIEW B LA English DT Article ID PROTON NMR; NEUTRON-SCATTERING; MU-SR; RELAXATION; MN-12-ACETATE; MN12O12-ACETATE; EXCITATIONS; MN-12 AB Mn-55 nuclear magnetic resonance (NMR) measurements have been carried out in an oriented powder sample of Mn12 acetate at low temperature (1.4-3 K) in order to investigate locally the static and dynamic magnetic properties of the molecule in its high-spin S=10 ground state. We report the observation of three 55Mn NMR lines under zero external magnetic field. From the resonance frequency and the width of the lines we derive the internal hyperfine field and the quadrupole coupling constant at each of the three nonequivalent Mn ion sites. From the field dependence of the spectrum we obtain a direct confirmation of the standard picture, in which spin moments of Mn4+ ions (S=3/2) of the inner tetrahedron are polarized antiparallel to that of Mn3+ ions (S=2) of the outer ring with no measurable canting from the easy axis up to an applied field of 6 T. It is found that the splitting of the Mn-55-NMR lines when a magnetic field is applied at low temperature allows one to monitor the off-equilibrium population of the molecules in the different low lying magnetic states. The measured nuclear spin-lattice relaxation time T, strongly depends on temperature and magnetic field. The behavior could be fitted well by considering the local-field fluctuations at the nuclear Mn-55 site due to the thermal reorientation of the total S=10 spin of the molecule. From the fit of the data one can derive the product of the spin-phonon coupling constant times the mean-square value of the fluctuating hyperfine field. The two constants could be estimated separately by making some assumptions. The comparison of the mean-square fluctuation from,relaxation with the static hyperfine field from the spectrum suggests that nonuniform terms (q not equal0) are important in describing the spin dynamics of the local Mn moments in the ground state. C1 Hokkaido Univ, Grad Sch Sci, Div Phys, Sapporo, Hokkaido 0600810, Japan. Iowa State Univ, Ames Lab, Dept Phys & Astron, Ames, IA 50011 USA. Unita INFM Pavia, Dipartimento Fis A Volta, I-271000 Pavia, Italy. Univ Florence, Dept Chem, I-50144 Florence, Italy. RP Furukawa, Y (reprint author), Hokkaido Univ, Grad Sch Sci, Div Phys, Sapporo, Hokkaido 0600810, Japan. RI Gatteschi, Dante/B-5429-2008 NR 29 TC 36 Z9 36 U1 1 U2 11 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 SEP 1 PY 2001 VL 64 IS 10 AR 104401 DI 10.1103/PhysRevB.64.104401 PG 7 WC Physics, Condensed Matter SC Physics GA 472HQ UT WOS:000170978400038 ER PT J AU Furukawa, Y Kumagai, K Lascialfari, A Aldrovandi, S Borsa, F Sessoli, R Gatteschi, D AF Furukawa, Y Kumagai, K Lascialfari, A Aldrovandi, S Borsa, F Sessoli, R Gatteschi, D TI NMR study of the molecular nanomagnet [Fe-8(N3C6H15)(6)O-2(OH)(12)]center dot[Br-8 center dot 9H(2)O] in the high-spin magnetic ground state SO PHYSICAL REVIEW B LA English DT Article ID CLUSTER NANOMAGNET; IRON(III) CATION; IRON CLUSTER; PROTON NMR; RELAXATION; MN12O12-ACETATE; MN-12-ACETATE; MANGANESE; CRYSTAL; ACETATE AB The magnetic molecular cluster [Fe-8(N3C6H15)(6)O-2(OH)(12)](8+)[Br-8.9H(2)O](8-), in short Fe8, has been investigated at low temperature by H-1-NMR and relaxation measurements. Some measurements of D-2-NMR in partially deuterated Fe8 clusters will also be reported. Upon decreasing temperature the NMR spectra display a very broad and structured signal which is the result of the internal local fields at the proton sites due to the local moments of the Fe(III) ions in the total S=10 magnetic ground state. The proton and deuteron NMR spectra have been analyzed and the different resonance peaks have been attributed to the different proton groups in the molecule. The simulation of the spectra by using a dipolar hyperfine field and the accepted model for the orientation of the Fe(III) local moments do not agree with the experiments even when the magnitude of the local Fc(III) moments is allowed to vary, It is concluded that a positive contact hyperfine interaction of the same order of magnitude as the dipolar interaction is present for all proton sites except the water molecules. The temperature and magnetic field dependence of the nuclear spin-lattice relaxation rate is ascribed to the fluctuations of the local Fe(III) moments, which follow rigidly the fluctuations of the total ground state magnetization of the nanomagnet. By using a simple model already utilized for the Mn 12 cluster, we derive the value of the spin phonon coupling constant which determines the lifetime broadening of the different magnetic quantum number m substates of the S=10 ground state. It is shown that the lifetime broadening decreases rapidly on lowering the temperature. When the lifetime becomes longer than the reciprocal of the frequency shift of the proton lines a structure emerges in the NMR spectrum reflecting the "frozen" local moment configuration. C1 Hokkaido Univ, Grad Sch Sci, Div Phys, Sapporo, Hokkaido 0600810, Japan. Dipartimento Fis A Volta, I-271000 Pavia, Italy. Unita INFM Pavia, I-271000 Pavia, Italy. Iowa State Univ Sci & Technol, Ames Lab, Dept Phys & Astron, Ames, IA 50011 USA. Univ Florence, Dept Chem, I-50144 Florence, Italy. RP Furukawa, Y (reprint author), Hokkaido Univ, Grad Sch Sci, Div Phys, Sapporo, Hokkaido 0600810, Japan. RI Gatteschi, Dante/B-5429-2008 NR 33 TC 39 Z9 39 U1 0 U2 4 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 SEP 1 PY 2001 VL 64 IS 9 AR 094439 DI 10.1103/PhysRevB.64.094439 PG 9 WC Physics, Condensed Matter SC Physics GA 467WD UT WOS:000170726000091 ER PT J AU Gaididei, YB Bishop, AR Rasmussen, KO Vanossi, A Bortolani, V AF Gaididei, YB Bishop, AR Rasmussen, KO Vanossi, A Bortolani, V TI Energy localization in pumped systems SO PHYSICAL REVIEW B LA English DT Article ID MODEL AB Considering a local nonlinear oscillator interacting with a chain of coupled Linear oscillators, we demonstrate that the dynamics of the local oscillator is characterized by a frequency-dependent damping constant, related to the frequency-dependent density of states of the linear modes. Further, we demonstrate how this intrinsic damping provides possibilities for multiple steady states of the nonlinear oscillator, and how these steady states may create local potentials for electrons that are adiabatically coupled with the linear modes. Finally, the implications on coarse-grained mode-ling of hard, softy and biological matter are discussed. C1 Ukrainian Acad Sci, Inst Theoret Phys, UA-252143 Kiev, Ukraine. Univ Calif Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Calif Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Univ Bologna, Dipartimento Fis, I-40127 Bologna, Italy. Univ Modena, INFM, I-41100 Modena, Italy. Univ Modena, Dipartimento Fis, I-41100 Modena, Italy. RP Gaididei, YB (reprint author), Ukrainian Acad Sci, Inst Theoret Phys, UA-252143 Kiev, Ukraine. RI Rasmussen, Kim/B-5464-2009 OI Rasmussen, Kim/0000-0002-4029-4723 NR 11 TC 0 Z9 0 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 SEP 1 PY 2001 VL 64 IS 10 AR 104303 PG 6 WC Physics, Condensed Matter SC Physics GA 472HQ UT WOS:000170978400035 ER PT J AU Goncharov, AF Struzhkin, VV Gregoryanz, E Hu, JZ Hemley, RJ Mao, HK Lapertot, G Bud'ko, SL Canfield, PC AF Goncharov, AF Struzhkin, VV Gregoryanz, E Hu, JZ Hemley, RJ Mao, HK Lapertot, G Bud'ko, SL Canfield, PC TI Raman spectrum and lattice parameters of MgB2 as a function of pressure SO PHYSICAL REVIEW B LA English DT Article ID GRUNEISEN PARAMETERS; STATE; SCATTERING; EQUATIONS; MODES AB We report Raman spectra and synchrotron x-ray diffraction measurements of lattice parameters of polycrystalline MgB2 under hydrostatic pressure conditions up to 15 GPa. An anomalously broadened Raman band at 620 cm(-1) is observed that exhibits a large linear pressure shift of its frequency. The large mode damping and Gruneisen parameter indicate the vibration is highly anharmonic, broadly consistent with theoretical predictions for the E-2g in-plane boron stretching mode. The results obtained may provide additional constraints on the electron-phonon coupling in the system. C1 Iowa State Univ, Ames Lab, Ames, IA 50010 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50010 USA. Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA. Carnegie Inst Sci, Ctr High Pressure Res, Washington, DC 20015 USA. RP Iowa State Univ, Ames Lab, Ames, IA 50010 USA. RI LAPERTOT, Gerard/B-3354-2008; Struzhkin, Viktor/J-9847-2013; Canfield, Paul/H-2698-2014 OI Struzhkin, Viktor/0000-0002-3468-0548; NR 33 TC 102 Z9 102 U1 3 U2 13 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 2001 VL 64 IS 10 AR 100509 DI 10.1103/PhysRevB.64.100509 PG 4 WC Physics, Condensed Matter SC Physics GA 472HQ UT WOS:000170978400019 ER PT J AU Haskel, D Stern, EA Polinger, V Dogan, F AF Haskel, D Stern, EA Polinger, V Dogan, F TI Ni-induced local distortions in La1.85Sr0.15Cu1-yNiyO4 and their relevance to T-c suppression: An angular-resolved XAFS study SO PHYSICAL REVIEW B LA English DT Article ID NEAR-EDGE STRUCTURE; ELECTRONIC-STRUCTURE; BOUND-STATES; IMPURITY; SUPERCONDUCTIVITY; GAP; LA2-XSRXCUO4; LA2-XSRXNIO4+DELTA; ND2-XCEXCUO4-Y; SUBSTITUTION AB We present results from angular-resolved x-ray-absorption fine-structure (XAFS) measurements at the Ni, La, and Sr K edges of oriented powders of La1.85Sr0.15Cu1-yNiyO4, with y=0.01, 0.03, 0.06 A special magnetic alignment procedure allowed us to measure pure (c) over cap- and ab-oriented XAFS at the Ni K edge in identical fluorescence geometries. Both the x-ray-absorption near-ed.-e structure and the XAFS unequivocally show that the NiO6 octahedra are contracted along the c axis by approximate to0.32 Angstrom relative to CuO6 octahedra while the in-plane distances of NiO6 and CuO6 octahedra are the same within 0.01 Angstrom. The NiO6 octahedral contraction drives the averaged axis contraction measured by diffraction with increasing content of Ni. The local axis shows strong spatial fluctuations, due to the different NiO6 and CuO6 octahedral configurations and the stronger bonding of a La3+ ion than a Sr2+ ion to the O(2) apical oxygens of such octahedra. We discuss the relevance of these findings to the mechanisms of loss of superconductivity at y approximate to0.03 and hole localization above y approximate to0.05 by Ni dopants. C1 Argonne Natl Lab, Adv Photon Source, Expt Facil Div, Argonne, IL 60439 USA. Univ Washington, Dept Phys, Seattle, WA 98195 USA. Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England. Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA. RP Haskel, D (reprint author), Argonne Natl Lab, Adv Photon Source, Expt Facil Div, Argonne, IL 60439 USA. NR 37 TC 15 Z9 15 U1 1 U2 5 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 SEP 1 PY 2001 VL 64 IS 10 AR 104510 DI 10.1103/PhysRevB.64.104510 PG 10 WC Physics, Condensed Matter SC Physics GA 472HQ UT WOS:000170978400081 ER PT J AU Hastings, MB Sondhi, SL AF Hastings, MB Sondhi, SL TI Breakdown of conformal invariance at strongly random critical points SO PHYSICAL REVIEW B LA English DT Article ID DISORDERED-SYSTEMS; FIELD-THEORY; DELOCALIZATION; FLUCTUATIONS; CHAINS; STATES AB We consider the breakdown of conformal and scale invariance in random systems with strongly random critical points. Extending previous results on one-dimensional systems, we provide an example of a three-dimensional system that has a strongly random critical point. The average correlation functions of this system demonstrate a breakdown of conformal invariance, while the typical correlation functions demonstrate a breakdown of scale invariance. The breakdown of conformal invariance is due to the vanishing of the correlation functions at the infinite disorder fixed point, causing the critical correlation functions to be controlled by a dangerously irrelevant operator describing the approach to the fixed point. We relate the computation of average correlation functions to a problem of persistence in the renormalization group flow. C1 Los Alamos Natl Lab, CNLS, Los Alamos, NM 87545 USA. Princeton Univ, Dept Phys, Princeton, NJ 08544 USA. RP Los Alamos Natl Lab, CNLS, MS B258, Los Alamos, NM 87545 USA. EM hastings@cnls.lanl.gov NR 28 TC 7 Z9 7 U1 0 U2 0 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 SEP 1 PY 2001 VL 64 IS 9 AR 094204 DI 10.1103/PhysRevB.64.094204 PG 9 WC Physics, Condensed Matter SC Physics GA 467WD UT WOS:000170726000045 ER PT J AU Klemm, RA Luban, M AF Klemm, RA Luban, M TI Zero-field time correlation functions of four classical Heisenberg spins on a ring SO PHYSICAL REVIEW B LA English DT Article ID INFINITE-TEMPERATURE; DYNAMICS; QUANTUM; MAGNETS; MODEL; HYDRODYNAMICS; BREAKDOWN; DIFFUSION; BEHAVIOR; CLUSTER AB A model relevant for the study of certain molecular magnets is the ring of N=4 classical spins with equal near neighbor isotropic Heisenberg exchange interactions. Assuming classical Heisenberg spin dynamics, we solve explicitly for the time evolution of each of the spins. Exact triple integral representations are derived for the auto, near-neighbor, and next-nearest-neighbor time correlation functions for any temperature. At infinite temperature, the correlation functions are reduced to quadrature. We then evaluate the Fourier transforms of these functions in closed form, which are double integrals. At low temperatures, the Fourier transform functions explicitly demonstrate the presence of magnons. Our exact results for the infinite-temperature correlation functions in the long-time asymptotic limit differ, qualitatively from those obtained assuming diffusive spin dynamics. Whether such explicitly nonhydrodynamic behavior would be maintained for large-N rings is discussed. C1 Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Klemm, RA (reprint author), Max Planck Inst Phys Komplexer Syst, Nothnitzer Str 38, D-01187 Dresden, Germany. NR 39 TC 10 Z9 10 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 2001 VL 64 IS 10 AR 104424 DI 10.1103/PhysRevB.64.104424 PG 16 WC Physics, Condensed Matter SC Physics GA 472HQ UT WOS:000170978400061 ER PT J AU Kortright, JB Kim, SK Denbeaux, GP Zeltzer, G Takano, K Fullerton, EE AF Kortright, JB Kim, SK Denbeaux, GP Zeltzer, G Takano, K Fullerton, EE TI Soft-x-ray small-angle scattering as a sensitive probe of magnetic and charge heterogeneity SO PHYSICAL REVIEW B LA English DT Article ID RESONANCE EXCHANGE SCATTERING; FILMS; MULTILAYER AB Cobalt 2p resonant scattering from Co/Pt multilayers with perpendicular anisotropy results from magnetic and chemical heterogeneity having very different length scales. Magnetic and chemical scattering result from domains and the crystalline grain structure, respectively, as confirmed by field-dependent scattering and by imaging using magnetic x-ray and atomic force microscopy. Magnetic and charge scattering have distinct energy spectra that are quantitatively modeled using measured Co scattering factors. Domain and chemical correlations remain uncoupled throughout the reversal process. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. IBM Corp, Almaden Res Ctr, San Jose, CA 95120 USA. RP Kortright, JB (reprint author), Korea Adv Inst Sci & Technol, Dept Phys, Taejon 305701, South Korea. RI Fullerton, Eric/H-8445-2013; Kim, Sang-Koog/J-4638-2014; Zeltzer, Gabriel/L-1475-2016 OI Fullerton, Eric/0000-0002-4725-9509; Zeltzer, Gabriel/0000-0001-7573-4170 NR 21 TC 58 Z9 58 U1 0 U2 11 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 SEP 1 PY 2001 VL 64 IS 9 AR 092401 DI 10.1103/PhysRevB.64.092401 PG 4 WC Physics, Condensed Matter SC Physics GA 467WD UT WOS:000170726000007 ER PT J AU Mahajan, AV Venkataramani, N AF Mahajan, AV Venkataramani, N TI Magnetic properties of Ni-doped Sr2CuO3 SO PHYSICAL REVIEW B LA English DT Article ID HEISENBERG ANTIFERROMAGNETIC CHAIN; SUSCEPTIBILITY; YBA2CU3O6+X; IMPURITIES AB We report the effects of doping Ni (S = 1) in place of Cu (S = 1/2) in the quasi-one-dimensional Heisenberg antiferromagnetic (1DHAF) chain compound Sr2CuO3. For the low doping levels considered here, Sr2Cu1-xNixO3 (0 less than or equal tox less than or equal to0.03), the lattice parameters do not change significantly upon doping. The magnetic susceptibility chi (ratio of the magnetization M to the applied field H) is found to have a Curie-like dependence at low temperatures. While the Curie constant Cw is found to increase with Ni doping, its magnitude is considerably smaller than expected from isolated S=1 Ni magnetic moments. This would seem to arise from the unusual nature of the ground state of the S=1/2 1DHAF compound Sr2CuO3. C1 Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India. Indian Inst Technol, Adv Ctr Res Elect, Bombay 400076, Maharashtra, India. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys, Ames, IA 50011 USA. RP Mahajan, AV (reprint author), Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India. NR 15 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 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 2001 VL 64 IS 9 AR 092410 DI 10.1103/PhysRevB.64.092410 PG 4 WC Physics, Condensed Matter SC Physics GA 467WD UT WOS:000170726000016 ER PT J AU Marian, J Wirth, BD Perlado, JM Odette, GR de la Rubia, TD AF Marian, J Wirth, BD Perlado, JM Odette, GR de la Rubia, TD TI Dynamics of self-interstitial migration in Fe-Cu alloys SO PHYSICAL REVIEW B LA English DT Article ID COMPUTER-SIMULATION; MOLECULAR-DYNAMICS; MICROSTRUCTURAL EVOLUTION; DISPLACEMENT CASCADES; STRAIN FIELD; ALPHA-IRON; METALS; BCC; CLUSTERS; DAMAGE AB We have performed molecular dynamics simulations of self-interstitial atom diffusion in pure alpha -Fe and in a dilute Fe-1.0-at. % Cu alloy. We find that the presence of this oversized substitutional solute significantly alters the self-interstitial diffusion properties. We explain this through a mechanism directly based on the atomic strain field interactions between the Cu and the self-interstitial atom. C1 Lawrence Livermore Natl Lab, Chem Mat Sci Directorate, Livermore, CA 94550 USA. Univ Politecn Madrid, Inst Fus Nucl, E-28006 Madrid, Spain. Univ Calif Santa Barbara, Dept Mech & Environm Engn, Santa Barbara, CA 93106 USA. RP Marian, J (reprint author), Lawrence Livermore Natl Lab, Chem Mat Sci Directorate, POB 808,L-353, Livermore, CA 94550 USA. RI Wirth, Brian/O-4878-2015 OI Wirth, Brian/0000-0002-0395-0285 NR 24 TC 30 Z9 30 U1 1 U2 15 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 SEP 1 PY 2001 VL 64 IS 9 AR 094303 DI 10.1103/PhysRevB.64.094303 PG 5 WC Physics, Condensed Matter SC Physics GA 467WD UT WOS:000170726000052 ER PT J AU McGuire, JJ Room, T Pronin, A Timusk, T Schlueter, JA Kelly, ME Kini, AM AF McGuire, JJ Room, T Pronin, A Timusk, T Schlueter, JA Kelly, ME Kini, AM TI Incoherent interplane conductivity of kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br SO PHYSICAL REVIEW B LA English DT Article ID PRESSURE ORGANIC SUPERCONDUCTOR; INFRARED OPTICAL-PROPERTIES; BEDT-TTF; AMBIENT-PRESSURE; TEMPERATURE-DEPENDENCE; ELECTRONIC-STRUCTURE; RAMAN-SPECTRA; CRYSTAL; KAPPA-(BEDT-TTF)(2)CU(NCS)(2); RESISTIVITY AB The interplane optical spectrum of the organic superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br was investigated in the frequency range from 40 to 40 000 cm(-1). The optical conductivity was obtained by Kramers-Kronig analysis of the reflectance. The absence of a Drude peak at low frequency is consistent with incoherent conductivity but in apparent contradiction to the metallic temperature dependence of the dc resistivity. We set an upper limit to the interplane transfer integral of t(b)(2)/t(ac)approximate to 10(-7) eV. A model of defect-assisted interplane transport can account for this discrepancy. We also assign the phonon lines in the conductivity to the asymmetric modes of the BEDT-TTF molecule. C1 McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. NICPB, EE-12618 Tallinn, Estonia. RP McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada. RI Room, Toomas/A-6412-2008; Kini, Aravinda/F-4467-2012; Pronin, Artem/D-7809-2016 OI Room, Toomas/0000-0002-6165-8290; NR 47 TC 24 Z9 24 U1 2 U2 7 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 SEP 1 PY 2001 VL 64 IS 9 AR 094503 DI 10.1103/PhysRevB.64.094503 PG 8 WC Physics, Condensed Matter SC Physics GA 467WD UT WOS:000170726000094 ER PT J AU Pagliuso, PG Petrovic, C Movshovich, R Hall, D Hundley, MF Sarrao, JL Thompson, JD Fisk, Z AF Pagliuso, PG Petrovic, C Movshovich, R Hall, D Hundley, MF Sarrao, JL Thompson, JD Fisk, Z TI Coexistence of magnetism and superconductivity in CeRh1-xIrxIn5 SO PHYSICAL REVIEW B LA English DT Article ID HEAVY AB We report a thermodynamic and transport study of the phase diagram of CeRh1-xIrxIn5. Bulk superconductivity is observed over a broad range of doping, 0.31, including a substantial range (0.365 GPa for both La and Pr. For PrFeO3 up to 90 GPa, the highest pressure reached with MS in this compound, and for LaFeO3 between 70-120 GPa, magnetic spin-spin relaxation spectra are observed suggesting the presence of a weak magnetic exchange. This coincides with a drastic decrease in the resistance. The observation of spin-lattice paramagnetic relaxation in spectra in the 120- to 170-GPa range for LaFeO3 Concurs with the onset of a metallic state with noninteracting moments as evidenced by R(P,T) studies. It is predicted that a normal metal, with no moments, will be established in LaFeO3 at similar to 240 GPa. A detailed analysis of the magnetic interactions in an antiferromagnetic insulator at very high pressures and a Mott-Hubbard phase diagram are presented in terms of the pressure versus the magnetic moment. C1 Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Xu, WM (reprint author), Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel. NR 17 TC 65 Z9 65 U1 2 U2 18 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 2001 VL 64 IS 9 AR 094411 DI 10.1103/PhysRevB.64.094411 PG 9 WC Physics, Condensed Matter SC Physics GA 467WD UT WOS:000170726000063 ER PT J AU Allgower, CE Ball, J Beddo, ME Bystricky, J Chamouard, PA Combet, M Demierre, P Fontaine, JM Grosnick, DP Hess, R Janout, Z Janout, ZF Kalinnikov, VA Kasprzyk, TE Khachaturov, BA Kunne, R Lehar, F de Lesquen, A Lopiano, D Pisarev, IL Popov, AA Prokofiev, AN Rapin, D Sans, JL Spinka, HM Teglia, A Usov, YA Vikhrov, VV Vuaridel, B Zhdanov, AA AF Allgower, CE Ball, J Beddo, ME Bystricky, J Chamouard, PA Combet, M Demierre, P Fontaine, JM Grosnick, DP Hess, R Janout, Z Janout, ZF Kalinnikov, VA Kasprzyk, TE Khachaturov, BA Kunne, R Lehar, F de Lesquen, A Lopiano, D Pisarev, IL Popov, AA Prokofiev, AN Rapin, D Sans, JL Spinka, HM Teglia, A Usov, YA Vikhrov, VV Vuaridel, B Zhdanov, AA TI Angular dependence of the pp elastic scattering spin correlation parameter A(00n)(n) between 0.8 and 2.8 GeV. II. Results for higher energies SO PHYSICAL REVIEW C LA English DT Article ID ANALYZING POWER; SATURNE-II; POLARIZATION; PROTON; BEAM; OBSERVABLES; APPARATUS; TARGET; REGION; ANN AB Measurements at 18 beam kinetic energies between 1975 and 2795 MeV and at 795 MeV are reported for the pp elastic scattering spin correlation parameter A(00nn) = (N.N,0,0)= C-NN=A(NN). The c.m. angular range is typically 60 degrees -100 degrees. These results are compared to previous data from Saturne II and other accelerators. A search for energy-dependent structure at fixed c.m. angles is performed. Comparisons are made to phase shift analysis and theoretical model predictions of this spin observable. C1 Argonne Natl Lab, HEP Div, Argonne, IL 60439 USA. CEA, DSM, F-91191 Gif Sur Yvette, France. IN2P3, CNRS, Natl Saturne Lab, F-91191 Gif Sur Yvette, France. CEA, DAPNIA, F-91191 Gif Sur Yvette, France. Univ Geneva, DPNC, CH-1211 Geneva 4, Switzerland. Joint Inst Nucl Res Dubna, Lab Nucl Problems, RU-141980 Dubna, Moscow Region, Russia. Petersburg Nucl Phys Inst, RU-188350 Gatchina, Russia. RP Allgower, CE (reprint author), Indiana Univ, Cyclotron Facil, Bloomington, IN 47408 USA. NR 29 TC 8 Z9 10 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 2001 VL 64 IS 3 AR 034003 DI 10.1103/PhysRevC.64.034003 PG 12 WC Physics, Nuclear SC Physics GA 472KV UT WOS:000170983800011 ER PT J AU Davids, CN Esbensen, H AF Davids, CN Esbensen, H TI Particle-vibration coupling in proton decay of near-spherical nuclei SO PHYSICAL REVIEW C LA English DT Article ID EXCITED-STATES; DRIP-LINE; EMITTERS; RADIOACTIVITY; LU-151 AB A particle-vibration coupling model is applied to explain the spectroscopic factors and decay rates of odd-A and odd-odd near-spherical proton emitters, as well as the branching ratio for the recently observed fine structure in the decay of Tm-145. In addition, a deformed solution for Tm-145 with K = 5/2(-) is presented. Using particle-vibration coupling, good agreement is achieved with observed spectroscopic factors for the near-spherical emitters, including d(3/2) cases. For the odd-odd emitters, the unpaired neutron is treated as a spectator. The single-particle potential used in this work has the same parameters as that used to successfully describe the decay rates of the deformed proton emitters Eu-131 and Ho-141. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Davids, CN (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. NR 32 TC 41 Z9 42 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 SEP PY 2001 VL 64 IS 3 AR 034317 DI 10.1103/PhysRevC.64.034317 PG 7 WC Physics, Nuclear SC Physics GA 472KV UT WOS:000170983800031 ER PT J AU Ding, KY Cizewski, JA Seweryniak, D Amro, H Carpenter, MP Davids, CN Fotiades, N Janssens, RVF Lauritsen, T Lister, CJ Nisius, D Reiter, P Uusitalo, J Wiedenhover, I Macchiavelli, AO AF Ding, KY Cizewski, JA Seweryniak, D Amro, H Carpenter, MP Davids, CN Fotiades, N Janssens, RVF Lauritsen, T Lister, CJ Nisius, D Reiter, P Uusitalo, J Wiedenhover, I Macchiavelli, AO TI Excited states in Yb-155 and Lu-155,Lu-156,Lu-157 from recoil-decay tagging SO PHYSICAL REVIEW C LA English DT Article ID HIGH-SPIN STATES; YRAST STATES; NUCLEUS; ISOMERS AB The 270-MeV Ni-58 + Pd-102 reaction was used for the first recoil-decay tagging measurement with Gamma-sphere coupled to the Fragment Mass Analyzer at Argonne National Laboratory. Level structures of Yb-155, Lu-156, and Lu-157, as well as the excited states associated with the 25/2(-) isomer in Lu-155, are identified for the first time. The systematical behavior of the energy levels is compared with that of neighboring isotones and isotopes. The attractive interaction between h(11/2) protons and h(9/2) neutrons plays an important role in the structure of Yb-155 and Lu-155,Lu-156. C1 Rutgers State Univ, Dept Phys & Astron, New Brunswick, NJ 08903 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Ding, KY (reprint author), Telcordia Technol, Piscataway, NJ 08854 USA. RI Carpenter, Michael/E-4287-2015 OI Carpenter, Michael/0000-0002-3237-5734 NR 27 TC 17 Z9 17 U1 4 U2 27 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 SEP PY 2001 VL 64 IS 3 AR 034315 DI 10.1103/PhysRevC.64.034315 PG 13 WC Physics, Nuclear SC Physics GA 472KV UT WOS:000170983800029 ER PT J AU Ernst, DJ AF Ernst, DJ TI Mesonic cloud contribution to the nucleon and Delta masses SO PHYSICAL REVIEW C LA English DT Article ID RELATIVIZED QUARK-MODEL; PI-N SCATTERING; CHEW-LOW THEORY; ELASTIC-SCATTERING; BARYON RESONANCES; SEPARABLE POTENTIALS; NONSTRANGE BARYONS; FORM-FACTOR; BAG MODEL; DECAYS AB Pion-nucleon elastic scattering in the dominant P-33 channel is examined in the model in which the interaction is of the form pi +N<->N, Delta (1232). New expressions are found for the elastic pion-nucleon scattering amplitude which differ from existing formula both in the kinematics and in the treatment of the renormalization of the nucleon mass and coupling constant. Fitting the model to the phase shifts in the P-33 channel does not uniquely fix the parameters of the model. The cutoff for the pion-nucleon form factor is found to lie in the range beta = 750+/-350 MeV/c. The masses of the nucleon and the Delta which would arise if there were no coupling to mesons are found to be m(N)((0)) = 1200+/-200 MeV and m(Delta)((0)) =1500+/-200 MeV. The difference in these bare masses, a quantity which would be accounted for by a residual gluon interaction, is found to be deltam((0)) = 350 +/-100 MeV. C1 Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. Jefferson Lab, Newport News, VA 23606 USA. RP Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. NR 67 TC 1 Z9 1 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 2001 VL 64 IS 3 AR 035201 PG 11 WC Physics, Nuclear SC Physics GA 472KV UT WOS:000170983800046 ER PT J AU Gayou, O Wijesooriya, K Afanasev, A Amarian, M Aniol, K Becher, S Benslama, K Bimbot, L Bosted, P Brash, E Calarco, J Chai, Z Chang, CC Chang, T Chen, JP Choi, S Chudakov, E Churchwell, S Crovelli, D Dieterich, S Dumalski, S Dutta, D Epstein, M Fissum, K Fox, B Frullani, S Gao, H Gao, J Garibaldi, F Gilman, R Glamazdin, S Glashausser, C Gomez, J Gorbenko, V Hansen, O Holt, RJ Hovdebo, J Huber, GM de Jager, CW Jiang, X Jones, C Jones, MK Kelly, J Kinney, E Kooijman, E Kumbartzki, G Kuss, M LeRose, J Liang, M Lindgren, R Liyanage, N Malov, S Margaziotis, DJ Markowitz, P McCormick, K Meekins, D Meziani, ZE Michaels, R Mitchell, J Morand, L Perdrisat, CF Pomatsalyuk, R Punjabi, V Ransome, RD Roche, R Rvachev, M Saha, A Sarty, A Schulte, EC Simon, D Strauch, S Suleiman, R Todor, L Ulmer, PE Urciuoli, GM Wojtsekhowski, B Xiong, F Xu, W AF Gayou, O Wijesooriya, K Afanasev, A Amarian, M Aniol, K Becher, S Benslama, K Bimbot, L Bosted, P Brash, E Calarco, J Chai, Z Chang, CC Chang, T Chen, JP Choi, S Chudakov, E Churchwell, S Crovelli, D Dieterich, S Dumalski, S Dutta, D Epstein, M Fissum, K Fox, B Frullani, S Gao, H Gao, J Garibaldi, F Gilman, R Glamazdin, S Glashausser, C Gomez, J Gorbenko, V Hansen, O Holt, RJ Hovdebo, J Huber, GM de Jager, CW Jiang, X Jones, C Jones, MK Kelly, J Kinney, E Kooijman, E Kumbartzki, G Kuss, M LeRose, J Liang, M Lindgren, R Liyanage, N Malov, S Margaziotis, DJ Markowitz, P McCormick, K Meekins, D Meziani, ZE Michaels, R Mitchell, J Morand, L Perdrisat, CF Pomatsalyuk, R Punjabi, V Ransome, RD Roche, R Rvachev, M Saha, A Sarty, A Schulte, EC Simon, D Strauch, S Suleiman, R Todor, L Ulmer, PE Urciuoli, GM Wojtsekhowski, B Xiong, F Xu, W TI Measurements of the elastic electromagnetic form factor ratio mu(p)G(Ep)/G(Mp) via polarization transfer SO PHYSICAL REVIEW C LA English DT Article ID ELECTRON-SCATTERING; PROTON AB We present measurements of the ratio of the proton elastic electromagnetic form factors, mu (p)G(Ep)/G(Mp). The Jefferson Lab Hall A Focal Plane Polarimeter was used to determine the longitudinal and transverse components of the recoil proton polarization in ep elastic scattering; the ratio of these polarization components is proportional to the ratio of the two for-in factors. These data reproduce the observation of Jones et al. [Phys, Rev. Lett. 84, 1398 (2000)], that the form factor ratio decreases significantly from unity above Q(2) = 1 GeV2. C1 Rutgers State Univ, Piscataway, NJ 08854 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Clermont Ferrand, IN2P3, F-63177 Clermont Ferrand, France. CALTECH, Pasadena, CA 91125 USA. Calif State Univ Los Angeles, Los Angeles, CA 90032 USA. Univ Colorado, Boulder, CO 80309 USA. DAPNIA, Saclay, France. Duke Univ, Durham, NC 27706 USA. Florida Int Univ, Miami, FL 33199 USA. Florida State Univ, Tallahassee, FL 32306 USA. Univ Georgia, Athens, GA 30602 USA. Univ Illinois, Urbana, IL 61801 USA. Ist Nazl Fis Nucl, Sez Sanita, I-00161 Rome, Italy. Ist Super Sanita, Fis Lab, I-00161 Rome, Italy. Kent State Univ, Kent, OH 44242 USA. Kharkov Phys & Technol Inst, UA-310108 Kharkov, Ukraine. Lund Univ, S-22100 Lund, Sweden. Univ Maryland, College Pk, MD 20742 USA. Univ Massachusetts, Amherst, MA 01003 USA. MIT, Cambridge, MA 02139 USA. Univ New Hampshire, Durham, NH 03824 USA. Norfolk State Univ, Norfolk, VA 23504 USA. N Carolina Cent Univ, Durham, NC 27707 USA. Old Dominion Univ, Norfolk, VA 23529 USA. Inst Phys Nucl, F-91406 Orsay, France. Univ Regina, Regina, SK S4S 0A2, Canada. Temple Univ, Philadelphia, PA 19122 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Univ Virginia, Charlottesville, VA 22901 USA. Coll William & Mary, Williamsburg, VA 23187 USA. RP Gilman, R (reprint author), Rutgers State Univ, Piscataway, NJ 08854 USA. EM gilman@jlab.org RI Gao, Haiyan/G-2589-2011; Simon, Daniel/H-3027-2011; Kuss, Michael/H-8959-2012; Holt, Roy/E-5803-2011; Sarty, Adam/G-2948-2014; OI Simon, Daniel/0000-0002-2799-3490; Glamazdin, Alexander/0000-0002-4172-7324; Afanasev, Andrei/0000-0003-0679-3307 NR 32 TC 199 Z9 199 U1 0 U2 4 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 SEP PY 2001 VL 64 IS 3 AR 038202 DI 10.1103/PhysRevC.64.038202 PG 4 WC Physics, Nuclear SC Physics GA 472KV UT WOS:000170983800058 ER PT J AU Hartley, DJ Riedinger, LL Riley, MA Balabanski, DL Kondev, FG Laird, RW Pfohl, J Archer, DE Brown, TB Clark, RM Devlin, M Fallon, P Hibbert, IM Joss, DT LaFosse, DR Nolan, PJ O'Brien, NJ Paul, ES Sarantites, DG Sheline, RK Shepherd, SL Simpson, J Wadsworth, R Zhang, JY Semmes, PB Donau, F AF Hartley, DJ Riedinger, LL Riley, MA Balabanski, DL Kondev, FG Laird, RW Pfohl, J Archer, DE Brown, TB Clark, RM Devlin, M Fallon, P Hibbert, IM Joss, DT LaFosse, DR Nolan, PJ O'Brien, NJ Paul, ES Sarantites, DG Sheline, RK Shepherd, SL Simpson, J Wadsworth, R Zhang, JY Semmes, PB Donau, F TI Detailed spectroscopy of the chiral-twin candidate bands in Pm-136 SO PHYSICAL REVIEW C LA English DT Article ID ROTATIONAL BANDS; TILTED ROTATION; ODD; CROSSINGS; PR-134; NUCLEI; MODEL AB The chiral-twin candidate bands recently observed in Pm-136 have been extended to high spins [I=(21)] using the Gammasphere gamma -ray spectrometer and the Microball charged-particle detector array. A more-detailed spectroscopy of the bands was possible. where the rotational alignments and B(M1)/B(E2) ratios confirm that both sequences have the pih(11/2)nuh(11/2) configuration. Particle-rotor calculations of intraband and interband transition strength ratios of the chiral-twin bands are compared with experimental values for the first time. Good agreement was found between the predicted transition strength ratios and the experimental values, thus supporting the possible chiral nature of the pih(11/2)nuh(11/2) configuration in Pm-136. C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. Washington Univ, Dept Chem, St Louis, MO 63110 USA. Univ York, Dept Phys, York YO1 5DD, N Yorkshire, England. Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England. CLRC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England. Tennessee Technol Univ, Dept Phys, Cookeville, TN 38505 USA. Forschungszentrum Rossendorf EV, D-01314 Dresden, Germany. St Kliment Ohridsky Univ Sofia, Fac Phys, BG-1164 Sofia, Bulgaria. RP Hartley, DJ (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. RI Devlin, Matthew/B-5089-2013 OI Devlin, Matthew/0000-0002-6948-2154 NR 19 TC 71 Z9 73 U1 2 U2 4 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 SEP PY 2001 VL 64 IS 3 AR 031304 DI 10.1103/PhysRevC.64.031304 PG 5 WC Physics, Nuclear SC Physics GA 472KV UT WOS:000170983800005 ER PT J AU Hung, CT Yang, SN Lee, TSH AF Hung, CT Yang, SN Lee, TSH TI Meson-exchange pi N models in three-dimensional Bethe-Salpeter formulation SO PHYSICAL REVIEW C LA English DT Article ID REACTION NEAR-THRESHOLD; NUCLEON-NUCLEON-INTERACTION; CROSS-SECTION; SCATTERING; PP->PP-PI(0); EQUATION; PHOTOPRODUCTION; ABSORPTION; IMPOSSIBILITY AB The pion-nucleon scattering is investigated by using several three-dimensional reduction schemes of the Bethe-Salpeter equation for a model Lagrangian involving pi, N, Delta, rho, and sigma fields. It is found that all of the resulting meson-exchange models can give similar good descriptions of the piN scattering data up to 400 MeV. However they have significant differences in describing the pi NN and piN Delta form factors and the piN off-shell t-matrix elements. We point out that these differences can be best distinguished by investigating the near threshold pion production from nucleon-nucleon collisions and pion photoproduction on the nucleon. The consequences of using these models to investigate various pion-nucleus reactions are also discussed. C1 Chung Hua Inst Technol, Taipei 11571, Taiwan. Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Hung, CT (reprint author), Chung Hua Inst Technol, Taipei 11571, Taiwan. NR 39 TC 35 Z9 35 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 SEP PY 2001 VL 64 IS 3 AR 034309 DI 10.1103/PhysRevC.64.034309 PG 10 WC Physics, Nuclear SC Physics GA 472KV UT WOS:000170983800023 ER PT J AU Mahmud, H Davids, CN Woods, PJ Davinson, T Heinz, A Poli, GL Ressler, JJ Schmidt, K Seweryniak, D Smith, MB Sonzogni, AA Uusitalo, J Walters, WB AF Mahmud, H Davids, CN Woods, PJ Davinson, T Heinz, A Poli, GL Ressler, JJ Schmidt, K Seweryniak, D Smith, MB Sonzogni, AA Uusitalo, J Walters, WB TI Proton radioactivity of La-117 SO PHYSICAL REVIEW C LA English DT Article ID NUCLEI AB A new more precise measurement of the ground-state proton decay of La-117 is presented [E-p =806(5) keV, t(1/2,p)=26(3) ms]. La-117 was produced via the p4n fusion-evaporation channel by bombarding a Zn-64 target with 310 and 295 MeV Ni-58 beams. The proton decay rate is consistent with emission from a prolate deformed 3/2(+) or 3/2(-) Nilsson state. No evidence is found for a previously reported proton decay from a high spin isomer in La-117. An upper limit for the production cross section for proton decay of La-116 at a bombarding energy of 325 MeV was established. C1 Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Univ Maryland, Dept Chem, College Pk, MD 20742 USA. Rutgers State Univ, Dept Phys & Astron, New Brunswick, NJ 08903 USA. Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA. Univ Jyvaskyla, Dept Phys, Jyvaskyla, Finland. RP Mahmud, H (reprint author), Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland. RI Ressler, Jennifer Jo/F-2279-2010; Heinz, Andreas/E-3191-2014 NR 17 TC 19 Z9 19 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 SEP PY 2001 VL 64 IS 3 AR 031303 DI 10.1103/PhysRevC.64.031303 PG 3 WC Physics, Nuclear SC Physics GA 472KV UT WOS:000170983800004 ER PT J AU Wang, E Wang, XN AF Wang, E Wang, XN TI Interplay of soft and hard processes and hadron p(T) spectra in pA and AA collisions SO PHYSICAL REVIEW C LA English DT Article ID LARGE-TRANSVERSE-MOMENTUM; RADIATIVE ENERGY-LOSS; HEAVY-ION COLLISIONS; QUARK-GLUON PLASMA; NUCLEAR COLLISIONS; PB+PB COLLISIONS; 200 AGEV; 158A GEV; QCD; DISTRIBUTIONS AB Motivated by a schematic model of multiple parton scattering within the Glauber formalism, the transverse momentum spectra in pA and AA collisions are analyzed in terms of a nuclear modification factor with respect to pp collisions. The existing data at the CERN Super Proton Synchrotron energies are shown to be consistent with the picture of Glauber multiple scattering in which the interplay between soft and hard processes and the effect of absorptive processes lead to nontrivial nuclear modification of the particle spectra. Relative to the additive model of incoherent hard scattering, the spectra are enhanced at large p(T) (hard) by multiple scattering while suppressed at low p(T) (soft) by absorptive correction with the transition occurring at around a scale p(0) similar to 1 - 2 GeV/c that separates soft and hard processes. Around the same scale, the p(T) spectra in pp collisions also change from an exponential form at low p(T) to a power-law behavior at high p(T). At very large p(T)>>p(0), the nuclear enhancement is shown to decrease as 1/p(T)(2). Implications of these nuclear effects on the study of jet quenching, parton thermalization, and collective radial flow in high-energy AA collisions are discussed. C1 Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Wang, E (reprint author), Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China. NR 52 TC 38 Z9 38 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 SEP PY 2001 VL 64 IS 3 AR 034901 DI 10.1103/PhysRevC.64.034901 PG 8 WC Physics, Nuclear SC Physics GA 472KV UT WOS:000170983800044 ER PT J AU Zhu, SL Puglia, S Holstein, BR Ramsey-Musolf, MJ AF Zhu, SL Puglia, S Holstein, BR Ramsey-Musolf, MJ TI Subleading corrections to parity-violating pion photoproduction SO PHYSICAL REVIEW C LA English DT Article ID CHIRAL PERTURBATION-THEORY; ANAPOLE MOMENT; NUCLEON COUPLINGS; F-18; SCATTERING; PHYSICS AB We compute the photon asymmetry B-gamma for near threshold parity-violating (PV) pion photoproduction through subleading order. We show that subleading contributions involve a new combination of PV couplings not included in previous analyses of hadronic PV. We argue that existing constraints on the leading order contribution to B-gamma-obtained from the PV gamma -decay of F-18-suggest that the impact of the subleading contributions may be more significant than expected from naturalness arguments. C1 CALTECH, Kellogg Radiat Lab 106 38, Pasadena, CA 91125 USA. Univ Connecticut, Dept Phys, Storrs, CT 06269 USA. Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA. Thomas Jefferson Natl Accelerator Facil, Theory Grp, Newport News, VA 23606 USA. RP Zhu, SL (reprint author), CALTECH, Kellogg Radiat Lab 106 38, Pasadena, CA 91125 USA. NR 39 TC 12 Z9 12 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 SEP PY 2001 VL 64 IS 3 AR 035502 PG 10 WC Physics, Nuclear SC Physics GA 472KV UT WOS:000170983800052 ER PT J AU Affolder, T Akimoto, H Akopian, A Albrow, MG Amaral, P Amendolia, SR Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Asakawa, T Ashmanskas, W Atac, M Azfar, F Azzi-Bacchetta, P Bacchetta, N Bailey, MW Bailey, S de Barbaro, P Barbaro-Galtieri, A Barnes, VE Barnett, BA Barone, M Bauer, G Bedeschi, F Belforte, S Bellettini, G Bellinger, J Benjamin, D Bensinger, J Beretvas, A Berge, JP Berryhill, J Bevensee, B Bhatti, A Binkley, M Bisello, D Blair, RE Blocker, C Bloom, K Blumenfeld, B Blusk, SR Bocci, A Bodek, A Bokhari, W Bolla, G Bonushkin, Y Bortoletto, D Boudreau, J Brandl, A van den Brink, S Bromberg, C Brozovic, M Bruner, N Buckley-Geer, E Budagov, J Budd, HS Burkett, K Busetto, G Byon-Wagner, A Byrum, KL Calafiura, P Campbell, M Carithers, W Carlson, J Carlsmith, D Cassada, J Castro, A Cauz, D Cerri, A Chan, AW Chang, PS Chang, PT Chapman, J Chen, C Chen, YC Cheng, MT Chertok, M Chiarelli, G Chirikov-Zorin, I Chlachidze, G Chlebana, F Christofek, L Chu, ML Chung, YS Ciobanu, CI Clark, AG Connolly, A Conway, J Cooper, J Cordelli, M Cranshaw, J Cronin-Hennessy, D Cropp, R Culbertson, R Dagenhart, D DeJongh, F Dell'Agnello, S Dell'Orso, M Demina, R Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Donati, S Done, J Dorigo, T Eddy, N Einsweiler, K Elias, JE Engels, E Erdmann, W Errede, D Errede, S Fan, Q Feild, RG Ferretti, C Field, RD Fiori, I Flaugher, B Foster, GW Franklin, M Freeman, J Friedman, J Fukui, Y Furic, I Galeotti, S Gallinaro, M Gao, T Garcia-Sciveres, M Garfinkel, AF Gatti, P Gay, C Geer, S Gerdes, DW Giannetti, P Giromini, P Glagolev, V Gold, M Goldstein, J Gordon, A Goshaw, AT Gotra, Y Goulianos, K Green, C Groer, L Grosso-Pilcher, C Guenther, M Guillian, G da Costa, JG Guo, RS Haas, RM Haber, C Hafen, E Hahn, SR Hall, C Handa, T Handler, R Hao, W Happacher, F Hara, K Hardman, AD Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Heiss, A Herndon, M Hoffman, KD Holck, C Hollebeek, R Holloway, L Hughes, R Huston, J Huth, J Ikeda, H Incandela, J Introzzi, G Iwai, J Iwata, Y James, E Jensen, H Jones, M Joshi, U Kambara, H Kamon, T Kaneko, T Karr, K Kasha, H Kato, Y Keaffaber, TA Kelley, K Kelly, M Kennedy, RD Kephart, R Khazins, D Kikuchi, T Kilminster, B Kirby, M Kirk, M Kim, BJ Kim, DH Kim, HS Kim, MJ Kim, SH Kim, YK Kirsch, L Klimenko, S Koehn, P Kongeter, A Kondo, K Konigsberg, J Kordas, K Korn, A Korytov, A Kovacs, E Kroll, J Kruse, M Kuhlmann, SE Kurino, K Kuwabara, T Laasanen, AT Lai, N Lami, S Lammel, S Lamoureux, JI Lancaster, M Latino, G LeCompte, T Lee, AM Leone, S Lewis, JD Lindgren, M Liss, TM Liu, JB Liu, YC Lockyer, N Loken, J Loreti, M Lucchesi, D Lukens, P Lusin, S Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Mariotti, M Martignon, G Martin, A Matthews, JAJ Mayer, J Mazzanti, P McFarland, KS McIntyre, P McKigney, E Menguzzato, M Menzione, A Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Minato, H Miscetti, S Mishina, M Mitselmakher, G Moggi, N Moore, E Moore, R Morita, Y Muelhearn, M Mukherjee, A Muller, T Munar, A Murat, P Murgia, S Musy, M Nachtman, J Nahn, S Nakada, H Nakaya, T Nakano, I Nelson, C Neuberger, D Newman-Holmes, C Ngan, CYP Nicolaidi, P Niu, H Nodulman, L Nomerotski, A Oh, SH Ohmoto, T Ohsugi, T Oishi, R Okusawa, T Olsen, J Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Pappas, SP Partos, D Patrick, J Pauletta, G Paulini, M Paus, C Pescara, L Phillips, TJ Piacentino, G Pitts, KT Plunkett, R Pompos, A Pondrom, L Pope, G Popovic, M Prokoshin, F Proudfoot, J Ptohos, F Pukhov, O Punzi, G Ragan, K Rakitine, A Reher, D Reichold, A Riegler, W Ribon, A Rimondi, F Ristori, L Riveline, M Robertson, WJ Robinson, A Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Safonov, A Sakumoto, WK Saltzberg, D Sansoni, A Santi, L Sato, H Savard, P Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scott, A Scribano, A Segler, S Seidel, S Seiya, Y Semenov, A Semeria, F Shah, T Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Siegrist, J Signorelli, G Sill, A Sinervo, P Singh, P Slaughter, AJ Sliwa, K Smith, C Snider, FD Solodsky, A Spalding, J Speer, T Sphicas, P Spinella, F Spiropulu, M Spiegel, L Steele, J Stefanini, A Strologas, J Strumia, F Stuart, D Sumorok, K Suzuki, T Takano, T Takashima, R Takikawa, K Tamburello, P Tanaka, M Tannenbaum, B Taylor, W Tecchio, M Teng, PK Terashi, K Tether, S Theriot, D Thurman-Keup, R Tipton, P Tkaczyk, S Tollefson, K Tollestrup, A Toyoda, H Trischuk, W de Troconiz, JF Tseng, J Turini, N Ukegawa, F Vaiciulis, T Valls, J Vejcik, S Velev, G Vidal, R Vilar, R Volobouev, I Vucinic, D Wagner, RG Wagner, RL Wahl, J Wallace, NB Walsh, AM Wang, C Wang, CH Wang, MJ Watanabe, T Waters, D Watts, T Webb, R Wenzel, H Wester, WC Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Winn, D Wolbers, S Wolinski, D Wolinski, J Wolinski, S Worm, S Wu, X Wyss, J Yagil, A Yao, W Yeh, GP Yeh, P Yoh, J Yosef, C Yoshida, T Yu, I Yu, S Yu, Z Zanetti, A Zetti, F Zucchelli, S AF Affolder, T Akimoto, H Akopian, A Albrow, MG Amaral, P Amendolia, SR Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Asakawa, T Ashmanskas, W Atac, M Azfar, F Azzi-Bacchetta, P Bacchetta, N Bailey, MW Bailey, S de Barbaro, P Barbaro-Galtieri, A Barnes, VE Barnett, BA Barone, M Bauer, G Bedeschi, F Belforte, S Bellettini, G Bellinger, J Benjamin, D Bensinger, J Beretvas, A Berge, JP Berryhill, J Bevensee, B Bhatti, A Binkley, M Bisello, D Blair, RE Blocker, C Bloom, K Blumenfeld, B Blusk, SR Bocci, A Bodek, A Bokhari, W Bolla, G Bonushkin, Y Bortoletto, D Boudreau, J Brandl, A van den Brink, S Bromberg, C Brozovic, M Bruner, N Buckley-Geer, E Budagov, J Budd, HS Burkett, K Busetto, G Byon-Wagner, A Byrum, KL Calafiura, P Campbell, M Carithers, W Carlson, J Carlsmith, D Cassada, J Castro, A Cauz, D Cerri, A Chan, AW Chang, PS Chang, PT Chapman, J Chen, C Chen, YC Cheng, MT Chertok, M Chiarelli, G Chirikov-Zorin, I Chlachidze, G Chlebana, F Christofek, L Chu, ML Chung, YS Ciobanu, CI Clark, AG Connolly, A Conway, J Cooper, J Cordelli, M Cranshaw, J Cronin-Hennessy, D Cropp, R Culbertson, R Dagenhart, D DeJongh, F Dell'Agnello, S Dell'Orso, M Demina, R Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Donati, S Done, J Dorigo, T Eddy, N Einsweiler, K Elias, JE Engels, E Erdmann, W Errede, D Errede, S Fan, Q Feild, RG Ferretti, C Field, RD Fiori, I Flaugher, B Foster, GW Franklin, M Freeman, J Friedman, J Fukui, Y Furic, I Galeotti, S Gallinaro, M Gao, T Garcia-Sciveres, M Garfinkel, AF Gatti, P Gay, C Geer, S Gerdes, DW Giannetti, P Giromini, P Glagolev, V Gold, M Goldstein, J Gordon, A Goshaw, AT Gotra, Y Goulianos, K Green, C Groer, L Grosso-Pilcher, C Guenther, M Guillian, G da Costa, JG Guo, RS Haas, RM Haber, C Hafen, E Hahn, SR Hall, C Handa, T Handler, R Hao, W Happacher, F Hara, K Hardman, AD Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Heiss, A Herndon, M Hoffman, KD Holck, C Hollebeek, R Holloway, L Hughes, R Huston, J Huth, J Ikeda, H Incandela, J Introzzi, G Iwai, J Iwata, Y James, E Jensen, H Jones, M Joshi, U Kambara, H Kamon, T Kaneko, T Karr, K Kasha, H Kato, Y Keaffaber, TA Kelley, K Kelly, M Kennedy, RD Kephart, R Khazins, D Kikuchi, T Kilminster, B Kirby, M Kirk, M Kim, BJ Kim, DH Kim, HS Kim, MJ Kim, SH Kim, YK Kirsch, L Klimenko, S Koehn, P Kongeter, A Kondo, K Konigsberg, J Kordas, K Korn, A Korytov, A Kovacs, E Kroll, J Kruse, M Kuhlmann, SE Kurino, K Kuwabara, T Laasanen, AT Lai, N Lami, S Lammel, S Lamoureux, JI Lancaster, M Latino, G LeCompte, T Lee, AM Leone, S Lewis, JD Lindgren, M Liss, TM Liu, JB Liu, YC Lockyer, N Loken, J Loreti, M Lucchesi, D Lukens, P Lusin, S Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Mariotti, M Martignon, G Martin, A Matthews, JAJ Mayer, J Mazzanti, P McFarland, KS McIntyre, P McKigney, E Menguzzato, M Menzione, A Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Minato, H Miscetti, S Mishina, M Mitselmakher, G Moggi, N Moore, E Moore, R Morita, Y Muelhearn, M Mukherjee, A Muller, T Munar, A Murat, P Murgia, S Musy, M Nachtman, J Nahn, S Nakada, H Nakaya, T Nakano, I Nelson, C Neuberger, D Newman-Holmes, C Ngan, CYP Nicolaidi, P Niu, H Nodulman, L Nomerotski, A Oh, SH Ohmoto, T Ohsugi, T Oishi, R Okusawa, T Olsen, J Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Pappas, SP Partos, D Patrick, J Pauletta, G Paulini, M Paus, C Pescara, L Phillips, TJ Piacentino, G Pitts, KT Plunkett, R Pompos, A Pondrom, L Pope, G Popovic, M Prokoshin, F Proudfoot, J Ptohos, F Pukhov, O Punzi, G Ragan, K Rakitine, A Reher, D Reichold, A Riegler, W Ribon, A Rimondi, F Ristori, L Riveline, M Robertson, WJ Robinson, A Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Safonov, A Sakumoto, WK Saltzberg, D Sansoni, A Santi, L Sato, H Savard, P Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scott, A Scribano, A Segler, S Seidel, S Seiya, Y Semenov, A Semeria, F Shah, T Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Siegrist, J Signorelli, G Sill, A Sinervo, P Singh, P Slaughter, AJ Sliwa, K Smith, C Snider, FD Solodsky, A Spalding, J Speer, T Sphicas, P Spinella, F Spiropulu, M Spiegel, L Steele, J Stefanini, A Strologas, J Strumia, F Stuart, D Sumorok, K Suzuki, T Takano, T Takashima, R Takikawa, K Tamburello, P Tanaka, M Tannenbaum, B Taylor, W Tecchio, M Teng, PK Terashi, K Tether, S Theriot, D Thurman-Keup, R Tipton, P Tkaczyk, S Tollefson, K Tollestrup, A Toyoda, H Trischuk, W de Troconiz, JF Tseng, J Turini, N Ukegawa, F Vaiciulis, T Valls, J Vejcik, S Velev, G Vidal, R Vilar, R Volobouev, I Vucinic, D Wagner, RG Wagner, RL Wahl, J Wallace, NB Walsh, AM Wang, C Wang, CH Wang, MJ Watanabe, T Waters, D Watts, T Webb, R Wenzel, H Wester, WC Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Winn, D Wolbers, S Wolinski, D Wolinski, J Wolinski, S Worm, S Wu, X Wyss, J Yagil, A Yao, W Yeh, GP Yeh, P Yoh, J Yosef, C Yoshida, T Yu, I Yu, S Yu, Z Zanetti, A Zetti, F Zucchelli, S TI Measurement of the W boson mass with the Collider Detector at Fermilab SO PHYSICAL REVIEW D LA English DT Article ID QED RADIATIVE-CORRECTIONS; CENTRAL ELECTROMAGNETIC CALORIMETER; CENTRAL TRACKING CHAMBER; SILICON VERTEX DETECTOR; UNIVERSAL MONTE-CARLO; TOP-QUARK MASS; E(+)E(-) COLLISIONS; HADRONIC COLLISIONS; ACCURATE MEASUREMENT; PAIR-PRODUCTION AB We present a measurement of the W boson mass using data collected with the CDF detector during the 1994-1995 collider run at the Fermilab Tevatron. A fit to the transverse mass spectrum of a sample of 30115 W --> ev events recorded in an integrated luminosity of 84 pb(-1) gives a mass M-W=80.473 +/-0.065(stat) +/-0.092(syst) GeV/c(2). A fit to the transverse mass spectrum of a sample of 14740 W --> muv events from 80 pb(-1) gives a mass M-W=80,465 +/-0.100(stat)+/-0.103(syst) Ge V/c(2) The dominant contributions to the systematic uncertainties are the uncertainties in the electron energy scale and the muon momentum scale, 0.075 GeV/c(2) and 0.085 GeV/c(2), respectively. The combined value for the electron and muon channel is M-W=80.470 +/-0.089-GeV/c(2). When combined with previously published CDF measurements, we obtain M-W=80.433 +/-0.079 GeV/c(2). C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy. Brandeis Univ, Waltham, MA 02254 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain. 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 4, Switzerland. Harvard Univ, Cambridge, MA 02138 USA. 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. Kyungpook Natl Univ, Korean Hadron Collider Lab, Taegu 702701, South Korea. Seoul Natl Univ, Seoul 151742, South Korea. Sungkyunkwan Univ, Suwon 440746, South Korea. High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, Japan. 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. Univ New Mexico, Albuquerque, NM 87131 USA. Ohio State Univ, Columbus, OH 43210 USA. Osaka City Univ, Osaka 588, Japan. Univ Oxford, Oxford OX1 3RH, England. Univ Padua, Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy. Univ Penn, Philadelphia, PA 19104 USA. Univ Pisa, Ist Nazl Fis Nucl, I-56100 Pisa, Italy. Scuola Normale Super Pisa, I-56100 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. 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 Udine, Ist Nazl Fis Nucl, Udine, Italy. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Tufts Univ, Medford, MA 02155 USA. Waseda Univ, Tokyo 169, Japan. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06520 USA. RP Affolder, T (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RI Lancaster, Mark/C-1693-2008; Vucinic, Dejan/C-2406-2008; Nomerotski, Andrei/A-5169-2010; Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; Chiarelli, Giorgio/E-8953-2012; Scodellaro, Luca/K-9091-2014; vilar, rocio/P-8480-2014; Introzzi, Gianluca/K-2497-2015; Prokoshin, Fedor/E-2795-2012 OI Signorelli, Giovanni/0000-0001-8262-8245; Goldstein, Joel/0000-0003-1591-6014; Lami, Stefano/0000-0001-9492-0147; Paulini, Manfred/0000-0002-6714-5787; CHANG, PAO-TI/0000-0003-4064-388X; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Chiarelli, Giorgio/0000-0001-9851-4816; Scodellaro, Luca/0000-0002-4974-8330; Introzzi, Gianluca/0000-0002-1314-2580; Prokoshin, Fedor/0000-0001-6389-5399 NR 80 TC 158 Z9 159 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 1 PY 2001 VL 64 IS 5 AR 052001 DI 10.1103/PhysRevD.64.032001 PG 39 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 467WF UT WOS:000170726200001 ER PT J AU Albuquerque, IFM Smoot, GEF AF Albuquerque, IFM Smoot, GEF TI Measuring atmospheric neutrino oscillations with neutrino telescopes SO PHYSICAL REVIEW D LA English DT Article ID GOING MUONS; FLUX; SOUDAN-2; RATIO AB Neutrino telescopes with large detection volumes can demonstrate whether the current indications of neutrino oscillation are correct or if a better description can be achieved with nonstandard alternatives. Observations of contained muons produced by atmospheric neutrinos can better constrain the allowed region for oscillations or determine the relevant parameters of nonstandard models. We analyze the possibility of neutrino telescopes measuring atmospheric neutrino oscillations. We suggest adjustments to improve this potential. An addition of four densely instrumented strings to the AMANDA II detector makes oscillation observations feasible. Such a configuration is competitive with current and proposed experiments. C1 Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA. Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Phys, Berkeley, CA 94720 USA. RP Albuquerque, IFM (reprint author), Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA. EM IFAlbuquerque@lbl.gov; GFSmoot@lbl.gov RI Albuquerque, Ivone/H-4645-2012 OI Albuquerque, Ivone/0000-0001-7328-0136 NR 34 TC 8 Z9 8 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 1 PY 2001 VL 64 IS 5 AR 053008 DI 10.1103/PhysRevD.64.053008 PG 14 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 467WF UT WOS:000170726200011 ER PT J AU Ambrogiani, M Argiro, S Bagnasco, S Baldini, W Bettoni, D Borreani, G Buzzo, A Calabrese, R Cester, R Dalpiaz, P Garzoglio, G Gollwitzer, KE Hahn, A Jin, S Kasper, J Lasio, G Lo Vetere, M Luppi, E Maas, P Macri, M Mandelkern, M Marchetto, F Marinelli, N Marsh, W Martini, M Menichetti, E Mussa, R Obertino, MM Pallavicini, M Pastrone, N Patrignani, C Peoples, J Pordes, S Robutti, E Rosen, J Rumerio, P Santroni, A Savrie, M Schultz, J Stancari, G Stancari, M Streets, J Werkema, S Zioulas, G AF Ambrogiani, M Argiro, S Bagnasco, S Baldini, W Bettoni, D Borreani, G Buzzo, A Calabrese, R Cester, R Dalpiaz, P Garzoglio, G Gollwitzer, KE Hahn, A Jin, S Kasper, J Lasio, G Lo Vetere, M Luppi, E Maas, P Macri, M Mandelkern, M Marchetto, F Marinelli, N Marsh, W Martini, M Menichetti, E Mussa, R Obertino, MM Pallavicini, M Pastrone, N Patrignani, C Peoples, J Pordes, S Robutti, E Rosen, J Rumerio, P Santroni, A Savrie, M Schultz, J Stancari, G Stancari, M Streets, J Werkema, S Zioulas, G CA E835 Collaboration TI Search for the eta '(c) (2(1)S(0)) charmonium resonance SO PHYSICAL REVIEW D LA English DT Article ID FERMILAB; EXPERIMENT-835; CALORIMETER; MESONS; MODEL; E760; LEP AB We report on a search by Fermilab experiment E835 for the eta'(c) (2 S-1(0)) charmonium resonance in the process (p) over barp --> eta'(c)--> gamma gamma. No signal was observed and, based on 34 pb(-1) integrated luminosity, we determine the following upper limits (90% confidence level) to the product of the branching ratios for a resonance mass in the region 3575-3660 MeV/c(2): Br(eta'(c)-->(p) over barp) x Br(eta'(c)--> gamma gamma)< 12.0x10(-8) for = 5 MeV; <5.9x 10(-8) for =10 MeV; <4.8x 10(-8) for = 15 MeV. Combiing the present data with those of the predecessor experiment, E760, the upper limits become 8.0x10(-8), 5.0x10(-8), and 4.5x10(-8), respectively. In the restricted region 3589-3599 MeV/c(2), where a candidate was reported by the Crystal Ball experiment, we obtain the following limits from the combined E760-E835 experiments: Br(eta'(c)-->(p) over barp) x Br(eta'(c)--> gamma gamma)<5.6x10(-8) for =5 MeV; <3.7x10(-8) for = 8 MeV. A comparison of these with other experimental results is presented. C1 Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Ferrara, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, I-16146 Genoa, Italy. Univ Genoa, I-16146 Genoa, Italy. Univ Calif Irvine, Irvine, CA 92697 USA. Northwestern Univ, Evanston, IL 60208 USA. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Turin, I-10125 Turin, Italy. RP Ambrogiani, M (reprint author), Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. RI Patrignani, Claudia/C-5223-2009; Messier, Claude/A-2322-2008; Luppi, Eleonora/A-4902-2015; Calabrese, Roberto/G-4405-2015; Lo Vetere, Maurizio/J-5049-2012; Pallavicini, Marco/G-5500-2012 OI Patrignani, Claudia/0000-0002-5882-1747; Messier, Claude/0000-0002-4791-1763; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; Lo Vetere, Maurizio/0000-0002-6520-4480; Pallavicini, Marco/0000-0001-7309-3023 NR 27 TC 22 Z9 22 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 1 PY 2001 VL 64 IS 5 AR 052003 DI 10.1103/PhysRevD.64.052003 PG 11 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 467WF UT WOS:000170726200003 ER PT J AU Gelis, F Schiff, D Serreau, J AF Gelis, F Schiff, D Serreau, J TI Simple out-of-equilibrium field theory formalism? SO PHYSICAL REVIEW D LA English DT Article ID REAL-TIME; FINITE-TEMPERATURE; PERTURBATION-SERIES; PINCH SINGULARITIES; RESUMMATION; SCALAR AB In this paper, we determine a condition of the applicability of a very simple formalism for the calculation of a fast process taking place in a nonequilibrium medium, in which the particle distribution functions are frozen in time. Indeed, a well-known obstacle for the use of such a naive formalism is the appearance of the so-called "pinch singularities." We argue that these potentially dangerous terms can be regularized, and that they are negligible if the characteristic time scale of the process under study is small compared to the relaxation time of the system. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Univ Paris 11, Phys Theor Lab, F-91405 Orsay, France. European Ctr Theoret Studies Nucl Phys & Related, Trent, Italy. RP Gelis, F (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. NR 23 TC 11 Z9 11 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 1 PY 2001 VL 64 IS 5 AR 056006 DI 10.1103/PhysRevD.64.056006 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 467WF UT WOS:000170726200056 ER PT J AU Hall, L Nomura, Y AF Hall, L Nomura, Y TI Gauge unification in higher dimensions SO PHYSICAL REVIEW D LA English DT Article ID GRAND-UNIFICATION; EXTRA DIMENSIONS; FERMION MASSES; PROTON DECAY; SUPERSYMMETRY; CONSERVATION; SUPERGRAVITY; BREAKING; MODELS; SU(5) AB A complete 5-dimensional SU(5) unified theory is constructed which, on compactification on the orbifold with two different Z(2)'s (Z(2) and Z(2)'), yields the minimal supersymmetric standard model. The orbifold accomplishes SU(5) gauge symmetry breaking, doublet-triplet splitting, and a vanishing of proton decay from operators of dimension 5. Until 4D supersymmetry is broken, all proton decay from dimension 4 and dimension 5 operators is forced to vanish by an exact U(1)(R) symmetry. Quarks and leptons and their Yukawa interactions are located at the Z(2) orbifold fixed points, where SU(5) is unbroken. A new mechanism for introducing SU(5) breaking into the quark and lepton masses is introduced, which originates from the SU(5) violation in the zero-mode structure of bulk multiplets. Even though SU(5) is absent at the Z(2)' orbifold fixed point, the brane threshold corrections to gauge coupling unification are argued to be negligibly small, while the logarithmic corrections are small and in a direction which improves the agreement with the experimental measurements of the gauge couplings. Furthermore, the X gauge boson mass is lowered, so that p --> e(+) pi (0) is expected with a rate within about one order of magnitude of the current limit. Supersymmetry breaking occurs on the Z(2)' orbifold fixed point, and is felt directly by the gauge and Higgs sectors, while squarks and sleptons acquire mass via gaugino mediation, solving the supersymmetric flavor problem. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA. RP Hall, L (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. OI Nomura, Yasunori/0000-0002-1497-1479 NR 32 TC 383 Z9 383 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 1 PY 2001 VL 64 IS 5 AR 055003 DI 10.1103/PhysRevD.64.055003 PG 10 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 467WF UT WOS:000170726200042 ER PT J AU Isgur, N Jeschonnek, S Melnitchouk, W Van Orden, JW AF Isgur, N Jeschonnek, S Melnitchouk, W Van Orden, JW TI Quark-hadron duality in structure functions SO PHYSICAL REVIEW D LA English DT Article ID DEEP-INELASTIC SCATTERING; QCD SUM-RULES; RESONANCE PHYSICS; HEAVY MESONS; FORM-FACTORS; MODEL; EXPANSION; DECAY; BEHAVIOR; BARYONS AB While quark-hadron duality is well established experimentally, the current theoretical understanding of this important phenomenon is quite limited. To expose the essential features of the dynamics behind duality, we use a simple model in which the hadronic spectrum consists of narrow resonances made of valence quarks. We qualitatively reproduce the features of duality as seen in electron scattering data within our model. We show that in order to observe duality, it is essential to use the appropriate scaling variable and scaling function. In addition to its great intrinsic interest in connecting the quark-gluon and hadronic pictures, an understanding of quark-hadron duality could lead to important benefits in extending the applicability of scaling into previously inaccessible regions. C1 Jefferson Lab, Newport News, VA 23606 USA. Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia. Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA. RP Isgur, N (reprint author), Jefferson Lab, 12000 Jefferson Ave, Newport News, VA 23606 USA. NR 58 TC 56 Z9 56 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 1 PY 2001 VL 64 IS 5 AR 054005 DI 10.1103/PhysRevD.64.054005 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 467WF UT WOS:000170726200026 ER PT J AU Lee, WJ AF Lee, WJ TI Perturbative matching of the staggered four-fermion operators for epsilon'/epsilon SO PHYSICAL REVIEW D LA English DT Article ID DIRECT CP VIOLATION; 4-FERMION OPERATORS; MATRIX-ELEMENTS; LATTICE; DECAYS; RENORMALIZATION AB Using staggered fermions, we calculate the perturbative corrections to the bilinear and four-fermion operators that are used in the numerical study of weak matrix elements for epsilon'/epsilon. We present results for one-loop matching coefficients between continuum operators, calculated in the naive dimensional regularization (NDR) scheme, and gauge invariant staggered fermion operators. In particular, we concentrate on Feynman diagrams of the current-current insertion type. We also present results for the tadpole improved operators. These results, combined with existing results for penguin diagrams, provide a complete one-loop renormalization of the staggered four-fermion operators. Therefore, using our results, it is possible to match a lattice calculation of K-0-(K) over bar (0) mixing and K --> pi pi decays to the continuum NDR results with all corrections of O(g(2)) included. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Lee, WJ (reprint author), Los Alamos Natl Lab, Mail Stop B285, Los Alamos, NM 87545 USA. EM wlee@gita.lanl.gov NR 31 TC 9 Z9 9 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 1 PY 2001 VL 64 IS 5 AR 054505 DI 10.1103/PhysRevD.64.054505 PG 20 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 467WF UT WOS:000170726200037 ER PT J AU Page, PR AF Page, PR TI (Field) symmetrization selection rules SO PHYSICAL REVIEW D LA English DT Article ID N-C QCD; MESONS AB QCD and QED exhibit an infinite set of three-point Green's functions that contain only Okubo-Zweig-Iizuka (OZI) rule violating contributions, and (for QCD) are subleading in the large N-c expansion. The Green's functions describe the "decay" of a J(PC) = {1,3,5,...}(-+) exotic hybrid meson current to two J = 0 (hybrid) meson currents with identical P and C. We prove that the QCD amplitude for a neutral hybrid {1,3,5.... }(-) (+) exotic current to create eta pi (0) only comes from OZI rule violating contributions under certain conditions, and is subleading in N-c. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Page, PR (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM prp@lanl.gov RI Page, Philip/L-1885-2015 OI Page, Philip/0000-0002-2201-6703 NR 19 TC 5 Z9 5 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 1 PY 2001 VL 64 IS 5 AR 056009 DI 10.1103/PhysRevD.64.056009 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 467WF UT WOS:000170726200059 ER PT J AU Towell, RS McGaughey, PL Awes, TC Beddo, ME Brooks, ML Brown, CN Bush, JD Carey, TA Chang, TH Cooper, WE Gagliardi, CA Garvey, GT Geesaman, DF Hawker, EA He, XC Isenhower, LD Kaplan, DM Kaufman, SB Kirk, PN Koetke, DD Kyle, G Lee, DM Lee, WM Leitch, MJ Makins, N Moss, JM Mueller, BA Nord, PM Papavassiliou, V Park, BK Peng, JC Petitt, G Reimer, PE Sadler, ME Sondheim, WE Stankus, PW Thompson, TN Tribble, RE Vasiliev, MA Wang, YC Wang, ZF Webb, JC Willis, JL Wise, DK Young, GR AF Towell, RS McGaughey, PL Awes, TC Beddo, ME Brooks, ML Brown, CN Bush, JD Carey, TA Chang, TH Cooper, WE Gagliardi, CA Garvey, GT Geesaman, DF Hawker, EA He, XC Isenhower, LD Kaplan, DM Kaufman, SB Kirk, PN Koetke, DD Kyle, G Lee, DM Lee, WM Leitch, MJ Makins, N Moss, JM Mueller, BA Nord, PM Papavassiliou, V Park, BK Peng, JC Petitt, G Reimer, PE Sadler, ME Sondheim, WE Stankus, PW Thompson, TN Tribble, RE Vasiliev, MA Wang, YC Wang, ZF Webb, JC Willis, JL Wise, DK Young, GR CA FNAL NuSea Collaboration TI Improved measurement of the (d)over-bar/(u)over-bar asymmetry in the nucleon sea SO PHYSICAL REVIEW D LA English DT Article ID LIGHT-QUARK SEA; CHARGE-SYMMETRY VIOLATION; DYNAMICAL PARTON DISTRIBUTIONS; DEEP-INELASTIC SCATTERING; DRELL-YAN PROCESS; NN FORM-FACTOR; 280 GEV-C; FLAVOR ASYMMETRY; DIMUON PRODUCTION; CROSS-SECTIONS AB Measurements of the ratio of Drell-Yan yields from an 800 GeV/c proton beam incident on liquid hydrogen and deuterium targets are reported. Approximately 360 000 Drell-Yan muon pairs remained after all cuts on the data. From these data, the ratio of down antiquark ((d) over bar) to up ((u) over bar) antiquark distributions in the proton sea is determined over a wide range in Bjorken-x. These results confirm previous measurements by E866 and extend them to lower x. From these data, ((d) over bar-(u) over bar) and integral((d) over bar-(u) over bar )dx are evaluated for 0.0152, negative ions convert to electrons during their diffusion towards the walls. The presence of detached electrons results in "self-trapping" of the negative ions, due to emerging electric fields, and the negative ion flux to the walls is extremely small. In the case T-i< D abstraction cross-section, sigma (R), on Pt(111) and the (2 x 2) and (root3 x root3)R30 degrees -Sn/Pt(111) surface alloys were determined to be 0.21, 0.93, and 1.7 Angstrom (2), respectively. The corresponding D --> H abstraction cross-sections for the two alloys were determined to be 0.8, and 1.5 Angstrom (2), respectively. The values of sigma (R) for both H --> D and D --> H reactions increase with Theta (Sn) and indicate a significant structural sensitivity for H abstraction reactions. There is no significant kinetic isotope effect on either alloy surface, however there is evidence that incident H atoms are slightly more efficient in abstracting adsorbed D atoms than vice versa. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Univ So Calif, Dept Chem, Los Angeles, CA 90089 USA. Los Alamos Natl Lab, Chem Sci & Technol Div, Los Alamos, NM 87544 USA. RP Paffett, MT (reprint author), Univ So Calif, Dept Chem, SSC 606, Los Angeles, CA 90089 USA. RI Koel, Bruce/H-3857-2013 OI Koel, Bruce/0000-0002-0032-4991 NR 66 TC 6 Z9 6 U1 4 U2 17 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD SEP 1 PY 2001 VL 490 IS 1-2 BP 133 EP 143 DI 10.1016/S0039-6028(01)01323-1 PG 11 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 470AZ UT WOS:000170849400020 ER PT J AU Paul, M Dewey, SL Gardner, EL Brodie, JD Ashby, CR AF Paul, M Dewey, SL Gardner, EL Brodie, JD Ashby, CR TI Gamma-vinyl GABA (GVG) blocks expression of the conditioned place preference response to heroin in rats SO SYNAPSE LA English DT Article DE conditioned place preference; drug abuse; heroin; gamma-vinyl GABA AB We examined the effect of gamma-vinyl GABA (GVG) on the expression of the conditioned place preference response to intraperitoneally (i.p.) administered heroin in rats. Heroin, but not vehicle, produced a significant conditioned place preference response. Pretreatment of animals with 300 mg/kg of GVG significantly attenuated the expression of the heroin-induced conditioned place preference response. These results are the first to suggest that systemic GVG may provide an effective alternative to methadone maintenance in the treatment of heroin addiction, since it is without abuse potential and can be used for treatment outside an institutional setting. Synapse 41: 219-220,2001. (C) 2001 Wiley-Liss, Inc. C1 St Johns Univ, Coll Pharm & Allied Hlth Profess, Pharmaceut Hlth Sci Dept, Jamaica, NY 11439 USA. Eon Labs Mfg Inc, Laurelton, NY 11413 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. Albert Einstein Coll Med, Dept Psychiat, Bronx, NY 10461 USA. Albert Einstein Coll Med, Dept Neurosci, Bronx, NY 10461 USA. NYU, Sch Med, Dept Psychiat, New York, NY 10016 USA. RP Ashby, CR (reprint author), St Johns Univ, Coll Pharm & Allied Hlth Profess, Pharmaceut Hlth Sci Dept, 8000 Utopia Pkwy, Jamaica, NY 11439 USA. NR 6 TC 21 Z9 21 U1 1 U2 2 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0887-4476 J9 SYNAPSE JI Synapse PD SEP PY 2001 VL 41 IS 3 BP 219 EP 220 DI 10.1002/syn.1078 PG 2 WC Neurosciences SC Neurosciences & Neurology GA 459GQ UT WOS:000170243000006 PM 11391783 ER PT J AU Medina, M Collins, TM Walsh, PJ AF Medina, M Collins, TM Walsh, PJ TI mtDNA ribosomal gene phylogeny of sea hares in the genus Aplysia (Gastropoda, Opisthobranchia, Anaspidea): Implications for comparative neurobiology SO SYSTEMATIC BIOLOGY LA English DT Article DE Anaspidea; Aplysia phylogeny; neurobiology of inking; neurobiology of swimming; Opisthobranchia; sea hare ID LEARNING-RELATED NEUROMODULATION; PARAPODIAL SWIM MUSCLE; CENTRAL PROGRAM; NEURAL CIRCUIT; DNA-SEQUENCES; CALIFORNICA; BRASILIANA; INKING; EVOLUTION; NEURONS AB Sea hares within the genus Aplysia are important neurobiological model organisms; as more studies based on different Aplysia species are appearing in the literature, a phylogenetic framework has become essential. We present a phylogenetic hypothesis for fl-tis genus, based on portions of two mitochondrial genes (12S and 16S). In addition, we reconstruct the evolution of several behavioral characters of interest to neurobiologists to illustrate the potential benefits of a phylogeny for the genus Aplysia. These benefits include determination of ancestral traits, direction and timing of evolution of characters, prediction of the distribution of traits, and identification of cases of independent acquisition of traits within linea es. This last benefit may prove especially useful in understanding the linkage between behaviors and their underlying neurological bases. C1 Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Marine Biol & Fisheries, Miami, FL 33149 USA. Florida Int Univ, Dept Biol Sci, Miami, FL 33199 USA. RP Medina, M (reprint author), DOE Joint Genome Inst, Comparat Genom Grp, 2800 Mitchell Dr B400, Walnut Creek, CA 94598 USA. FU NCRR NIH HHS [RR 10294] NR 50 TC 13 Z9 14 U1 1 U2 2 PU TAYLOR & FRANCIS LTD PI LONDON PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND SN 1063-5157 J9 SYST BIOL JI Syst. Biol. PD SEP-OCT PY 2001 VL 50 IS 5 BP 676 EP 688 PG 13 WC Evolutionary Biology SC Evolutionary Biology GA 492CK UT WOS:000172149600005 PM 12116938 ER PT J AU Demir, I Zbib, HM Khaleel, M AF Demir, I Zbib, HM Khaleel, M TI Microscopic analysis of crack propagation for multiple cracks, inclusions and voids SO THEORETICAL AND APPLIED FRACTURE MECHANICS LA English DT Article ID KINKED CRACKS; SOLIDS; GROWTH AB The elastic crack interaction with internal defects, such as microcracks, voids and rigid inclusions, is investigated in this study for the purpose of analyzing crack propagation. The elastic stress field is obtained using linear theory of elasticity for isotropic materials. The cracks are modeled as pile-ups of edge dislocations resulting into a coupled set of integral equations, whose kernels are those of a dislocation in a medium with or without an inclusion or void. The numerical solution of these equations gives the stress intensity factors and the complete stress field in the given domain. The solution is valid for a general solid, however the propagation analysis is valid mostly for brittle materials. Among different propagation models the ones based on maximum circumferential stress and minimum strain energy density theories, are employed. A special emphasis is given to the estimation of the crack propagation direction that defines the direction of crack branching or kinking. Once a propagation direction is determined, an improved model dealing with kinked cracks must be employed to follow the propagation behavior. (C) 2001 Elsevier Science Ltd. All rights reserved. C1 Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA. King Saud Univ, Dept Mech Engn, Riyadh 11421, Saudi Arabia. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Zbib, HM (reprint author), Washington State Univ, Sch Mech & Mat Engn, POB 642929, Pullman, WA 99164 USA. OI khaleel, mohammad/0000-0001-7048-0749 NR 22 TC 7 Z9 7 U1 0 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-8442 J9 THEOR APPL FRACT MEC JI Theor. Appl. Fract. Mech. PD SEP-OCT PY 2001 VL 36 IS 2 BP 147 EP 164 DI 10.1016/S0167-8442(01)00065-9 PG 18 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA 483JE UT WOS:000171631600007 ER PT J AU Renne, R Fouillet, X Maurer, J Assaad, A Morgan, K Hahn, F Nikula, K Gillet, N Copley, M AF Renne, R Fouillet, X Maurer, J Assaad, A Morgan, K Hahn, F Nikula, K Gillet, N Copley, M TI Recommendation of optimal method for formalin fixation of rodent lungs in routine toxicology studies SO TOXICOLOGIC PATHOLOGY LA English DT Article C1 Battelle Toxicol NW, Richland, WA 99352 USA. Bracco Res SA, Geneva, Switzerland. Pathol Assoc, W Chester, OH USA. US EPA, Washington, DC 20460 USA. Glaxo Wellcome Inc, Res Triangle Pk, NC 27709 USA. Pharmacia, St Louis, MO USA. Sierra Biomed, Sparks, NV USA. RP Renne, R (reprint author), Battelle Toxicol NW, POB 999, Richland, WA 99352 USA. NR 3 TC 14 Z9 14 U1 0 U2 0 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA SN 0192-6233 J9 TOXICOL PATHOL JI Toxicol. Pathol. PD SEP-OCT PY 2001 VL 29 IS 5 BP 587 EP 589 DI 10.1080/019262301317226401 PG 3 WC Pathology; Toxicology SC Pathology; Toxicology GA 574KM UT WOS:000176888500012 PM 11695577 ER PT J AU Schultz, IR Sylvester, SR AF Schultz, IR Sylvester, SR TI Stereospecific toxicokinetics of bromochloro- and chlorofluoroacetate: Effect of GST-zeta depletion SO TOXICOLOGY AND APPLIED PHARMACOLOGY LA English DT Article DE GST-zeta CFA; BCA; chiral; cytosol ID GLUTATHIONE TRANSFERASE-ZETA; DICHLOROACETIC-ACID; DRINKING-WATER; B6C3F1 MICE; DIBROMOACETIC ACID; IN-VITRO; CATALYZED BIOTRANSFORMATION; TRICHLOROACETIC-ACID; URINARY METABOLITES; TREATED RATS AB The chloro- and bromohaloacetates are drinking water disinfection by-products and rodent carcinogens. Chloro-bromo dihaloacetates are also mechanism-based inhibitors of glutathione S-transferase-zeta (GSTZ1-1). We studied the stereospecific toxicokinetics and in vitro metabolism of two chiral dihaloacetates in male F344 rats: (-),(+)-bromochloroacetate (BCA) and racemic chlorofluoroacetate (CFA), a non-GST-zeta -inhibiting dihaloacetate. These experiments were repeated in animals that had previously been treated with dichloroacetate (DCA) to deplete GST-zeta activity. Results indicated that the elimination half-Life of (-)BCA was 0.07 compared to 0.40 h for (+)-BCA in naive rats. A comparable difference in elimination half-life was also observed for the CFA stereoisomers (0.79 vs 0.11 h). In GST-zeta -depleted rats, stereospecific elimination of (-),(+)-BCA was absent, with both stereoisomers having an elimination half-life of approximately 0.4 h. This finding was in contrast to results for CFA, which still maintained the same relative difference in elimination rate between its stereoisomers, although overall elimination was diminished in GST-zeta -depleted rats. Results of in vitro metabolism experiments indicated (-)-BCA was affected by modulating GST- activity, with the intrinsic metabolic clearance decreasing from 2.81 to 0.15 ml h(-1) mg.protein(-1) (naive, GST-C depleted) compared with values for (+)-BCA (0.30 and 0.31 ml h(-1) mg.protein(-1)). Incubations with 350 muM diethyldithiocarbamate preferentially decreased (+)-BCA metabolism in naive and GST-depleted cytosol. These results indicate (+)-BCA is a poor substrate for GST- and its metabolism is controlled by an additional GST isoenzyme. (C) 2001 Academic Press. C1 Battelle Pacific NW Div, Mol Biosci Dept, Richland, WA 99352 USA. Washington State Univ, Vancouver, WA 98686 USA. RP Schultz, IR (reprint author), Battelle Pacific NW Div, Mol Biosci Dept, Richland, WA 99352 USA. NR 44 TC 14 Z9 14 U1 0 U2 1 PU ACADEMIC PRESS INC PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0041-008X J9 TOXICOL APPL PHARM JI Toxicol. Appl. Pharmacol. PD SEP 1 PY 2001 VL 175 IS 2 BP 104 EP 113 DI 10.1006/taap.2001.9250 PG 10 WC Pharmacology & Pharmacy; Toxicology SC Pharmacology & Pharmacy; Toxicology GA 472YE UT WOS:000171011900002 PM 11543642 ER PT J AU Hanson, PJ Todd, DE Amthor, JS AF Hanson, PJ Todd, DE Amthor, JS TI A six-year study of sapling and large-tree growth and mortality responses to natural and induced variability in precipitation and throughfall (vol 21, pg 345, 2001) SO TREE PHYSIOLOGY LA English DT Correction C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. RP Hanson, PJ (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA. RI Hanson, Paul J./D-8069-2011 OI Hanson, Paul J./0000-0001-7293-3561 NR 1 TC 0 Z9 0 U1 0 U2 6 PU HERON PUBLISHING PI VICTORIA PA 202, 3994 SHELBOURNE ST, VICTORIA, BC V8N 3E2, CANADA SN 0829-318X J9 TREE PHYSIOL JI Tree Physiol. PD SEP PY 2001 VL 21 IS 15 BP 1158 EP 1158 PG 1 WC Forestry SC Forestry GA 478QF UT WOS:000171356300009 ER PT J AU Blau, PJ AF Blau, PJ TI Introduction to the special issue on friction test methods for research and applications SO TRIBOLOGY INTERNATIONAL LA English DT Editorial Material C1 Oak Ridge Natl Lab, ASTM Comm Wear & Eros G2, Oak Ridge, TN 37381 USA. RP Blau, PJ (reprint author), Oak Ridge Natl Lab, ASTM Comm Wear & Eros G2, POB 2008,Mail Stop 6063, Oak Ridge, TN 37381 USA. NR 3 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0301-679X J9 TRIBOL INT JI Tribol. Int. PD SEP PY 2001 VL 34 IS 9 BP 581 EP 583 DI 10.1016/S0301-679X(01)00049-4 PG 3 WC Engineering, Mechanical SC Engineering GA 474BC UT WOS:000171083600001 ER PT J AU Blau, PJ AF Blau, PJ TI The significance and use of the friction coefficient SO TRIBOLOGY INTERNATIONAL LA English DT Article DE friction; friction coefficient; kinetic friction; static friction; tribology terminology AB The quantity known as the friction coefficient (or 'coefficient of friction') has long been used in science and engineering. It is easy to define, but not easy to understand on a fundamental level. Conceptually defined as the ratio of two forces acting, respectively, perpendicular and parallel to an interface between two bodies under relative motion or impending relative motion, this dimensionless quantity turns out to be convenient for depicting the relative ease with which materials slide over one another under particular circumstances. Despite the fact that both static and kinetic friction coefficients can be measured with little difficulty under laboratory conditions, the time- and condition-dependent characteristics of friction coefficients associated with both clean and lubricated surfaces have proven exceedingly difficult to predict a priori from first principles. The shaky nature of friction's fundamental underpinnings, has not prevented investigators from compiling lists of friction coefficients and publishing them for general use. Problems often arise, however, when engineers attempt to use tabulated friction coefficients to solve specific problems in mechanical design or failure analysis. The systems-dependence of frictional behavior is sometimes ignored, leading to misapplication of published data. This is particularly true for applications in nano-technology and others that differ from typical laboratory size scales. This paper will review the measurement and use of static and kinetic friction coefficients, discuss their usefulness, and describe the sources of frictional resistances in terms of shear localization. (C) 2001 Elsevier Science Ltd. All rights reserved. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Blau, PJ (reprint author), Oak Ridge Natl Lab, POB 2008,Mail Stop 6063, Oak Ridge, TN 37831 USA. NR 19 TC 122 Z9 126 U1 2 U2 40 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0301-679X J9 TRIBOL INT JI Tribol. Int. PD SEP PY 2001 VL 34 IS 9 BP 585 EP 591 DI 10.1016/S0301-679X(01)00050-0 PG 7 WC Engineering, Mechanical SC Engineering GA 474BC UT WOS:000171083600002 ER PT J AU Cooper, CA Glass, RJ Tyler, SW AF Cooper, CA Glass, RJ Tyler, SW TI Effect of buoyancy ratio on the development of double-diffusive finger convection in a Hele-Shaw cell SO WATER RESOURCES RESEARCH LA English DT Article ID SALT FINGERS; STABILITY; DISPERSION; TRANSPORT; FRACTURES AB We consider the evolution of double-diffusive finger convection for a two-solute (salt-sucrose) system in a Hele-Shaw cell. A high-resolution, full-field, light transmission technique was used to study the development of the instability that resulted from layering a lighter sucrose solution over a denser salt solution. The buoyancy ratio (R-rho), which is a ratio of fluid density contributions by the two solutes and defines the degree of system disequilibrium, was varied systematically from conditions that were nearly stable (R-rho = 2.8) to those that were moderately unstable (R-rho = 1.4). In all experiments, fingers are found to form continuously throughout time from a finger "generation" zone that straddles the location of the initial interface between solutions. At low R-rho, fingers develop rapidly, merge with adjacent fingers, and grow far beyond the finger generation zone through a series of finger "conduits." In the higher R-rho experiments, fingers are slower to evolve, do not interact as dynamically, and do not grow far beyond the generation zone. Solute mass fluxes at low R-rho quickly reach a constant many times greater than that of a purely diffusive system; at high R-rho, mass fluxes decay as t(-1/2) and behave diffusively but with effective diffusion coefficients much greater than those for molecular diffusion. C1 Desert Res Inst, Reno, NV 89512 USA. Sandia Natl Labs, Flow Visualizat & Proc Lab, Albuquerque, NM 87185 USA. Univ Nevada, Dept Environm & Resource Sci, Reno, NV 89557 USA. Univ Nevada, Dept Geol Sci, Reno, NV 89557 USA. RP Cooper, CA (reprint author), Desert Res Inst, 2215 Raggio Pkwy, Reno, NV 89512 USA. NR 26 TC 12 Z9 12 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD SEP PY 2001 VL 37 IS 9 BP 2323 EP 2332 DI 10.1029/2001WR000343 PG 10 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA 466AV UT WOS:000170622900004 ER PT J AU McLeod, KW Reed, MR Nelson, EA AF McLeod, KW Reed, MR Nelson, EA TI Influence of a willow canopy on tree seedling establishment for wetland restoration SO WETLANDS LA English DT Article DE restoration; reforestation; competition; black willow; bottomland hardwood; southeastern United States ID GROWTH; SURVIVAL AB Black willow (Salix nigra) is a well-known pioneer species of disturbed riparian areas. It competes for nutrients, light, and water, but it may also act as a "nurse" crop, providing shelter for other species from high light and temperature; so, the overall effect on species planted under a willow canopy could be positive or negative. This experiment examined the response of container-grown seedlings of four tree species outplanted into three habitats: 1) an existing willow stand, 2) a similar habitat, but with the willow canopy removed, and 3) an adjacent grass-dominated area free of willow. After three years, survival rates of overcup oak (Quercus lyrata), baldcypress (Taxodium distichum), and water hickory (Carya aquatica) were not reduced under the willow canopy relative to the other two treatments. Laurel oak (Q. laurifolia) was killed by several floods during the first growing season. Height of baldcypress seedlings planted under a willow canopy was less than for seedlings where the willow had been removed. Water hickory and overcup oak height were not affected by the willow canopy. Elevation of the planting sites, indicating probable soil wetness, was a good indicator of survival when used in conjunction with the species flood-tolerance. The existing willow stand was not detrimental to survival of three of the outplanted tree species. Thus, willow removal is unnecessary for successful outplanting, saving time and money. C1 Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA. Westinghouse Savannah River Co, Savannah River Technol Ctr, Aiken, SC 29802 USA. RP McLeod, KW (reprint author), Univ Georgia, Savannah River Ecol Lab, PO Drawer E, Aiken, SC 29802 USA. NR 20 TC 11 Z9 12 U1 3 U2 17 PU SOC WETLAND SCIENTISTS PI LAWRENCE PA 810 E TENTH ST, P O BOX 1897, LAWRENCE, KS 66044 USA SN 0277-5212 J9 WETLANDS JI Wetlands PD SEP PY 2001 VL 21 IS 3 BP 395 EP 402 DI 10.1672/0277-5212(2001)021[0395:IOAWCO]2.0.CO;2 PG 8 WC Ecology; Environmental Sciences SC Environmental Sciences & Ecology GA 477KB UT WOS:000171281800008 ER PT J AU Martin, RR Sham, TK Won, GW Jones, KW Feng, H AF Martin, RR Sham, TK Won, GW Jones, KW Feng, H TI Synchrotron x-ray fluorescence and secondary ion mass spectrometry in tree ring microanalysis: applications to dendroanalysis SO X-RAY SPECTROMETRY LA English DT Article ID TRACE-ELEMENT; WOOD; CD; PB AB Mining operations in the Sudbury district of northern Ontario have resulted in environmental damage caused by acid rain and heavy metal pollution. Remedial liming (Ca/MgCO3) has been used in an attempt to restore the pH of the lake water and soil to natural levels. The spatial and temporal variation of metal concentrations in the annual growth rings of trees may be a useful indicator of the effects of the pollutants and the liming operation. We used synchrotron radiation-induced x-ray emission (SRIXE) and secondary ion mass spectrometry (SIMS) to examine the distribution of selected metals in the annual growth rings of red pine (Pinus resinosa) from an area damaged by acid rain and heavy metal pollution which had been subjected to remedial liming (Ca/MgCO3). The results show a non-uniform distribution of metals in the stemwood, including seasonal variations and changes in the Ca/Mn ratio consistent with the increased soil pH following liming. Copyright (C) 2001 John Wiley & Sons, Ltd. C1 Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada. Brookhaven Natl Lab, Dept Environm Sci, Upton, NY 11973 USA. RP Martin, RR (reprint author), Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada. NR 13 TC 15 Z9 16 U1 1 U2 6 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX PO19 1UD, ENGLAND SN 0049-8246 J9 X-RAY SPECTROM JI X-Ray Spectrom. PD SEP-OCT PY 2001 VL 30 IS 5 BP 338 EP 341 DI 10.1002/xrs.507 PG 4 WC Spectroscopy SC Spectroscopy GA 476NW UT WOS:000171234700010 ER PT J AU Mozharivskyj, Y Kaczorowski, D Franzen, HF AF Mozharivskyj, Y Kaczorowski, D Franzen, HF TI Symmetry-breaking transitions in HoCuAs2-xPx and ErCuAs2-xPx (x=0-2): Crystal structure, application of Landau theory, magnetic and electrical properties SO ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE LA English DT Article DE copper; holmium; erbium; pnictides; crystal structure; symmetry-breaking transitions; Landau theory ID EARTH; CU AB Crystal structures of compounds undergoing symmetry-breaking transitions have been investigated by the Xray single crystal and powder methods. While the phases HoCuAs2 through HoCuAs1.33P0.67 and ErCuAs2 through ErCuAsP retain the tetragonal HfCuSi2 structure (P4/nmm space group), the compounds HoCuAsP through HoCuAs0.33P1.67 and ErCuAs0.67P1.33 through ErCuAs0.33P1.67 undergo orthorhombic distortions to the GdCuAs1.15P0.85 structure (Pmmn space group). Further distortions follow in the phosphides: HoCuP2 adopts a larger orthorhombic cell (Cmma, a = 5.273(3), b = 5.305(3). c = 9.645(5) Angstrom) and ErCuP2 has a monoclinic cell with a doubled parameter, the b parameter in the monoclinic cell (P2(1)/n, a = 3.737(3). b = 19.239(15), c = 3.728(3) Angstrom, beta = 90.09(1)degrees). Zigzag chains are formed in the phosphorus laver of ErCuP2. According to Landau theory the transitions from HoCuAs1.33P0.67 to HoCuAsP and from ErCuAsP to ErCuAs0.67P1.33 can be continuous, and the transitions from HoCuAs0.33P1.67 to HoCuP2 and from ErCuAs0.33P1.67 to ErCuP2 are necessarily first-order. The results of magnetic and electrical measurements for HoCuAs2 and HoCuP2 are reported. Due to the magnetic moments localized on Ho atoms both compounds order antiferromagnetically at low temperatures. They exhibit metallic conductivity. C1 Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. Polish Acad Sci, W Trzebiatowski Inst Low Temp & Struct Res, PL-00901 Warsaw, Poland. RP Franzen, HF (reprint author), Iowa State Univ, Ames Lab, US DOE, 342 Spedding Hall, Ames, IA 50011 USA. RI Kaczorowski, Dariusz/M-6572-2014 NR 18 TC 16 Z9 16 U1 1 U2 4 PU WILEY-V C H VERLAG GMBH PI BERLIN PA PO BOX 10 11 61, D-69451 BERLIN, GERMANY SN 0044-2313 J9 Z ANORG ALLG CHEM JI Z. Anorg. Allg. Chem. PD SEP PY 2001 VL 627 IS 9 BP 2163 EP 2172 DI 10.1002/1521-3749(200109)627:9<2163::AID-ZAAC2163>3.0.CO;2-N PG 10 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 478HB UT WOS:000171339000025 ER PT J AU Simonian, AL Grimsley, JK Flounders, AW Schoeniger, JS Cheng, TC DeFrank, JJ Wild, JR AF Simonian, AL Grimsley, JK Flounders, AW Schoeniger, JS Cheng, TC DeFrank, JJ Wild, JR TI Enzyme-based biosensor for the direct detection of fluorine-containing organophosphates SO ANALYTICA CHIMICA ACTA LA English DT Article DE organophosphorus acid anhydrolase; OPAA; pH-FET; ENFET; biosensor; diisopropyl fluorophosphate; paraoxon; demeton-S ID RECOMBINANT ESCHERICHIA-COLI; NERVE AGENT DECONTAMINATION; IMMOBILIZED CHOLINESTERASES; PSEUDOMONAS-DIMINUTA; SENSITIVE DETECTION; BACTERIAL ENZYME; PESTICIDES; HYDROLASE; PHOSPHOTRIESTERASE; INSECTICIDES AB The ability of the enzyme organophosphorus acid anhydrolase (OPAA) to selectively hydrolyze the P-F bond of fluorine containing organophosphates has been used to develop a biosensor for specific detection of these compounds. Hydrolysis rate of diisopropyl fluorophosphate (DFP), paraoxon and demeton-S, by soluble and immobilized OPAA was measured. These compounds were selected as representative substrates of OPAA hydrolysis of P-F, P-O and P-S bonds, respectively. Results indicate that hydrolysis of phosphofluoridates such as DFP is dominant while hydrolysis of phosphotriesters such as paraoxon or of phosphothiolates such as demeton-S, is negligible. Two experimental approaches were used for biosensor development. In the first, OPAA was covalently immobilized on silica gel and used in batch-mode measurements with flat a ges due to P-X bond cleavage. In the second approach, the enzyme was covalently glass pH electrode to detect pH changes immobilized to the porous silica modified gate insulator of a pH-sensitive field effect transistor (pH-FET) and changes in pH relative to a second non-enzyme coated pH-FET were measured in stop-flow mode. Concentrations of DFP down to 25 muM with the glass electrode and 20 muM with the pH-FET were readily detected. No sensor response was observed with paraoxon or demeton-S indicating that such OPAA-based biosensors could be useful for direct and discriminative detection of fluorine containing organophosphorus neurotoxins (such as the G-type chemical warfare agents sarin GB and soman GD) in samples also containing multiple organophosphate pesticides. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Texas A&M Univ, Dept Biochem & Biophys, College Stn, TX 77843 USA. Sandia Natl Labs, Chem & Radiat Detect Lab, Livermore, CA USA. USA, Edgewood Chem Biol Ctr, Livermore, CA USA. RP Simonian, AL (reprint author), Texas A&M Univ, Dept Biochem & Biophys, College Stn, TX 77843 USA. NR 25 TC 62 Z9 62 U1 4 U2 19 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 AUG 31 PY 2001 VL 442 IS 1 BP 15 EP 23 DI 10.1016/S0003-2670(01)01131-X PG 9 WC Chemistry, Analytical SC Chemistry GA 467NB UT WOS:000170709700002 ER PT J AU Song, XD Swanson, BI AF Song, XD Swanson, BI TI Rapid assay for avidin and biotin based on fluorescence quenching SO ANALYTICA CHIMICA ACTA LA English DT Article DE multivalent interaction; fluorescence self-quenching; assay; avidin; biotin ID LIQUID-CHROMATOGRAPHY; MULTIVALENT PROTEINS; COMPLEX; BINDING; TOXINS; RESONANCE; BIOSENSOR; VESICLES; SYSTEM AB Biotin was covalently tagged with a BODIPY dye which can undergo an efficient distance-dependent fluorescence self-quenching. Multivalent binding of avidin with the BODIPY-labeled biotin (B-581/591-biotin, either in aqueous buffer, or anchored on the surfaces of lipid vesicles or lipid bilayers coated on glass beads) induces aggregation of the BODIPY dye (up to four dyes for each avidin) to result in a decrease in fluorescence intensity due to fluorescence self-quenching. The system can be used to perform a rapid, direct assay for avidin and competitive assay for biotin with high sensitivity (< 50 pM for avidin and <0.2 nM for biotin) and selectivity. The assay method is generally applicable for detection of all the species involved in a multivalent binding interaction. Published by Elsevier Science B.V. C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. RP Song, XD (reprint author), Los Alamos Natl Lab, Biosci Div, POB 1663, Los Alamos, NM 87545 USA. NR 19 TC 25 Z9 26 U1 2 U2 13 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 AUG 31 PY 2001 VL 442 IS 1 BP 79 EP 87 DI 10.1016/S0003-2670(01)01128-X PG 9 WC Chemistry, Analytical SC Chemistry GA 467NB UT WOS:000170709700009 ER PT J AU Sato, Y Nakanishi, K Hirao, K Jinnai, H Shibayama, M Melnichenko, YB Wignall, GD AF Sato, Y Nakanishi, K Hirao, K Jinnai, H Shibayama, M Melnichenko, YB Wignall, GD TI Formation of ordered macropores and templated nanopores in silica sol-gel system incorporated with EO-PO-EO triblock copolymer SO COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS LA English DT Article; Proceedings Paper CT 2nd International TRI/Princeton Workshop on Characterization of Porous Materials CY JUN 19-21, 2000 CL PRINCETON, NEW JERSEY DE silica; phase separation; self-organization; sol-gel; SANS ID MESOPOROUS MOLECULAR-SIEVES; FILMS AB Silica gels with well-defined co-continuous gel skeletons and pore in the micrometer range have been prepared using a poly(ethylene oxide-propylene oxide-ethylene oxide (EO-PO-EO)) triblock copolymer. Being essentially independent of the micrometer-range structure, the mesopore exhibited narrow distributions around an identical median size and its volume was correlated well to the concentration of triblock copolymer. Small-angle neutron scattering of wet, dried and heat-treated gels revealed that the mesopore structure had been already templated at the sol-gel transition, and was preserved or even enhanced during the removal of solvent and carbonaceous constituents. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Kyoto Univ, Grad Sch Engn, Dept Mat Chem, Sakyo Ku, Kyoto 6068501, Japan. Kyoto Inst Technol, Dept Polymer Sci & Engn, Sakyo Ku, Kyoto 6068585, Japan. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. RP Sato, Y (reprint author), Kyoto Univ, Grad Sch Engn, Dept Mat Chem, Sakyo Ku, Kyoto 6068501, Japan. RI Nakanishi, Kazuki/A-1814-2012; Jinnai, Hiroshi/F-8456-2014; Shibayama, Mitsuhiro/E-1646-2015; OI Shibayama, Mitsuhiro/0000-0002-8683-5070; Wignall, George/0000-0002-3876-3244 NR 19 TC 39 Z9 41 U1 0 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0927-7757 J9 COLLOID SURFACE A JI Colloid Surf. A-Physicochem. Eng. Asp. PD AUG 31 PY 2001 VL 187 BP 117 EP 122 DI 10.1016/S0927-7757(01)00626-4 PG 6 WC Chemistry, Physical SC Chemistry GA 454AV UT WOS:000169951000011 ER PT J AU Jiang, L Liaw, PK Brooks, CR Somieski, B Klarstrom, DL AF Jiang, L Liaw, PK Brooks, CR Somieski, B Klarstrom, DL TI Nondestructive evaluation of fatigue damage in ULTIMET (R) superalloy SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE fatigue; nondestructive evaluation; acoustic emission; positron spectroscopy ID ACOUSTIC-EMISSION AB Acoustic emission (AE) and positron spectroscopy were used to study fatigue damage in ULTIMET alloy. The linear-location method of AE was employed for identifying the positions of crack initiation for a cylindrical specimen subjected to fatigue. Positron lifetime spectroscopy, as a sensitive nondestructive technique, was utilized to reveal the fatigue damage. The results obtained by the AE system were generally in good agreement with those of the average positron lifetimes by positron spectroscopy. The detected crack initiation was further investigated by scanning electron microscopy, which was found to be consistent with the AE and positron spectroscopy results. The crack-initiation stage of ULTIMET alloy subjected to high-cycle fatigue was characterized. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Chem Analyt Sci Div, Oak Ridge, TN 37831 USA. Haynes Int Inc, Kokomo, IN 46904 USA. RP Liaw, PK (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. NR 15 TC 9 Z9 12 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 AUG 31 PY 2001 VL 313 IS 1-2 BP 153 EP 159 DI 10.1016/S0921-5093(01)00935-2 PG 7 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 450YR UT WOS:000169772900016 ER PT J AU Finn, JT AF Finn, JT TI British science: A toast to teatime SO SCIENCE LA English DT Letter C1 Sandia Natl Labs, Syst Res Dept, Livermore, CA 94551 USA. RP Finn, JT (reprint author), Sandia Natl Labs, Syst Res Dept, Livermore, CA 94551 USA. NR 2 TC 0 Z9 0 U1 0 U2 1 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 AUG 31 PY 2001 VL 293 IS 5535 BP 1589 EP 1589 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 469FA UT WOS:000170802900020 PM 11550702 ER PT J AU Huston, MA AF Huston, MA TI People and biodiversity in Africa SO SCIENCE LA English DT Letter ID SPECIES RICHNESS C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. RP Huston, MA (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA. RI Huston, Michael/B-1434-2009 OI Huston, Michael/0000-0001-9513-1166 NR 4 TC 10 Z9 10 U1 1 U2 4 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 AUG 31 PY 2001 VL 293 IS 5535 BP 1591 EP 1591 DI 10.1126/science.293.5535.1591 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 469FA UT WOS:000170802900023 PM 11550704 ER PT J AU Chan, GCY Chan, WT Mao, XL Russo, RE AF Chan, GCY Chan, WT Mao, XL Russo, RE TI Comparison of matrix effects in inductively coupled plasma using laser ablation and solution nebulization for dry and wet plasma conditions SO SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY LA English DT Article DE matrix effects; ICP; water loading; laser ablation; plasma diagnostics ID ATOMIC-EMISSION-SPECTROMETRY; EASILY IONIZABLE ELEMENT; ELECTRON NUMBER DENSITIES; GAS-FLOW RATE; ANALYTE EMISSION; ARGON PLASMA; SAMPLE INTRODUCTION; LINE-INTENSITIES; EXCITATION; WATER AB Matrix effects of calcium in inductively coupled plasma-atomic emission spectrometry were investigated. Matrix effects were studied by monitoring the excitation conditions of the plasma using Zn ionic to atomic spectral line intensity ratios. Dry and wet inductively coupled plasmas with robust and non-robust conditions were compared. Laser ablation and solution nebulization sample introduction were used to produce the dry and wet plasma conditions, respectively. Low (0.61/min) and high (1.01/min) carrier gas flow rates were used to produce the robust and non-robust conditions, respectively. No differences in the trend of matrix effects for dry and wet plasmas were observed at vertical positions above normal observation height (> 8 mm height above load coil) for low and high carrier gas flow rates. However, matrix effects in the lower part of the plasma (< 8 mm height above load coil) were significantly different between dry and wet plasmas when a high carrier gas flow was used. The differences are likely due to the desolvation process. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Russo, RE (reprint author), Univ Hong Kong, Dept Chem, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China. NR 45 TC 18 Z9 18 U1 0 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0584-8547 J9 SPECTROCHIM ACTA B JI Spectroc. Acta Pt. B-Atom. Spectr. PD AUG 31 PY 2001 VL 56 IS 8 BP 1375 EP 1386 DI 10.1016/S0584-8547(01)00252-X PG 12 WC Spectroscopy SC Spectroscopy GA 478TT UT WOS:000171362000004 ER PT J AU Mozharivskyj, Y Franzen, HF AF Mozharivskyj, Y Franzen, HF TI Crystal structure of rare-earth-rich platinum pnictides RE5Pt2X (RE=Y, Gd, Tb, Dy, Ho, Er, Tm, Lu; X=Sb, Bi) and magnetic properties of Er5Pt2Bi SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article DE rare-earth compounds; pnictides AB Fifteen new rare-earth antimonides and bismuthides RE5Pt2X (see Table 1) have been synthesized and characterized by X-ray powder methods. The compounds are isostructural to previously reported RE5M2X pnictides and adopt the Mo3B2Si structure (space group 141mcm, an ordered version of Cr5B3). The RE5M2X series now includes 47 antimonides and bismuthides with M=Ni, Pd, Pt and the heavy rare earths except for ytterbium. Atomic and thermal parameters have been refined and the magnetic susceptibility was measured for Er5Pt2Bi. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. Iowa State Univ, US DOE, Ames, IA 50011 USA. RP Franzen, HF (reprint author), Iowa State Univ, Ames Lab, 342 Spedding Hall, Ames, IA 50011 USA. NR 6 TC 9 Z9 9 U1 1 U2 3 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD AUG 30 PY 2001 VL 327 IS 1-2 BP 78 EP 81 DI 10.1016/S0925-8388(01)01360-3 PG 4 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA 471RT UT WOS:000170943000018 ER PT J AU Takano, M Itoh, A Akabori, M Ogawa, T AF Takano, M Itoh, A Akabori, M Ogawa, T TI Oxygen solubility in dysprosium mononitride prepared by carbothermic synthesis SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article DE nitride materials; chemical synthesis; composition; X-ray diffraction ID (U,PU)N FUEL PELLETS; FABRICATION AB Dysprosium mononitride was prepared by carbothermic reduction of the sesquioxide in nitrogen gas stream. A variety of the initial C/Dy molar ratios were chosen to prepare the series of Dy(N, O) solid solutions. The residual carbon in the products was removed by additional heating with nitrogen and hydrogen mixed gas stream. The lattice parameter and composition of Dy(N, O) were determined by X-ray diffraction and quantitative analyses on N, O, and C. The lattice parameter of Dy(N, O) decreased with increasing oxygen content. The oxygen solubility in DyN-DY2O3 pseudo-binary system under I atm of nitrogen increased linearly with increasing temperature from similar to9 mol% DyO at 1623 K to similar to 14 mol% DyO at 2075 K. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Japan Atom Energy Res Inst, Dept Mat Sci, Tokai, Ibaraki 3191195, Japan. RP Takano, M (reprint author), Oak Ridge Natl Lab, Bid 5505,POB 2008,Mail Stop 6375, Oak Ridge, TN 37831 USA. NR 10 TC 10 Z9 10 U1 0 U2 11 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD AUG 30 PY 2001 VL 327 IS 1-2 BP 235 EP 239 DI 10.1016/S0925-8388(01)01443-8 PG 5 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA 471RT UT WOS:000170943000045 ER PT J AU Bartels, DM Gosztola, D Jonah, CD AF Bartels, DM Gosztola, D Jonah, CD TI Spur decay kinetics of the solvated electron in heavy water radiolysis SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID HYDRATED ELECTRON; LIQUID WATER; ABSORPTION-SPECTROSCOPY; SUBEXCITATION ELECTRONS; TRANSIENT ABSORPTION; RATE CONSTANTS; SOLID WATER; DEPENDENCE; H2O; D2O AB Spur decay kinetics of the hydrated electron following picosecond pulse radiolysis of heavy water have been measured using a time-correlated absorption spectroscopy (TCAS) technique. The TCAS data collected for the first 40 ns of the decay was matched up with single-shot transient digitizer data out to microsecond time scales. The decay shape in heavy water looks exactly like the decay in light water except in the first 10 ns. The "time zero" solvated electron yield in heavy water radiolysis must be approximately 7% larger than in light water, to match the best available scavenger product measurements. We propose an explanation in terms of the larger distances traveled by electrons in heavy water prior to localization. The implication is that presolvated H2O+ "holes" are very efficient scavengers for the presolvated conduction band electrons. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Bartels, DM (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Gosztola, David/D-9320-2011 OI Gosztola, David/0000-0003-2674-1379 NR 30 TC 23 Z9 23 U1 2 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 AUG 30 PY 2001 VL 105 IS 34 BP 8069 EP 8072 DI 10.1021/jp012153u PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 467XY UT WOS:000170730100015 ER PT J AU Fenter, P McBride, MT Srajer, G Sturchio, NC Bosbach, D AF Fenter, P McBride, MT Srajer, G Sturchio, NC Bosbach, D TI Structure of barite (001)- and (210)-water interfaces SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID X-RAY-REFLECTIVITY; ATOMIC-FORCE MICROSCOPY; IN-SITU; ELECTROLYTE INTERFACE; AQUEOUS-SOLUTION; SURFACE; CALCITE; GROWTH; DISSOLUTION; DIFFRACTION AB The structures of the barite (001) and (210) cleavage surfaces were measured in contact with deionized water at 25 degreesC. High resolution (similar to1 Angstrom) specular X-ray reflectivity and atomic force microscopy were used to probe the step structures of the cleaved surfaces and the atomic structures of the barite-water interfaces including the structures of water near the barite-water interfaces. The barite (001) and (210) cleavage surfaces are characterized by large (> 2500 Angstrom) domains separated by unit-cell steps (7.15 and 3.44 Angstrom steps for the (001) and (210) surfaces, respectively). This observation was unanticipated for the (001) surface in which adjacent BaSO4 layers are displaced vertically by c/2 and symmetry related through a 2(1) screw axis along (001). The atomic structures of the two cleavage surfaces derived by X-ray reflectivity reveal that near-surface sulfate groups exhibit significant (similar to0.4 Angstrom) structural displacements, while Ba surface ion displacements are significantly smaller (similar to0.07 Angstrom). Water adsorbs to the barite surfaces in a manner consistent, in both number and height, with the saturation of broken Ba-O bonds; no evidence was found for additional structuring of the fluid water near the surface. C1 Argonne Natl Lab, Div Environm Res, Argonne, IL 60439 USA. Lawrence Livermore Natl Lab, Div Mat & Chem Sci, Livermore, CA 94551 USA. Argonne Natl Lab, Adv Photon Source, Expt Facil Div, Argonne, IL 60439 USA. Univ Illinois, Dept Earth & Environm Sci, Chicago, IL 60607 USA. Forschungszentrum Karlsruhe, Inst Nukl Entsorgung, D-76021 Karlsruhe, Germany. RP Fenter, P (reprint author), Argonne Natl Lab, Div Environm Res, ER-203,9700 S Cass Ave, Argonne, IL 60439 USA. RI Bosbach, Dirk/C-7764-2011; OI Bosbach, Dirk/0000-0002-6099-0400; Fenter, Paul/0000-0002-6672-9748 NR 29 TC 54 Z9 55 U1 2 U2 21 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1089-5647 J9 J PHYS CHEM B JI J. Phys. Chem. B PD AUG 30 PY 2001 VL 105 IS 34 BP 8112 EP 8119 DI 10.1021/jp0105600 PG 8 WC Chemistry, Physical SC Chemistry GA 467XL UT WOS:000170729000010 ER PT J AU Plass, R Last, JA Bartelt, NC Kellogg, GL AF Plass, R Last, JA Bartelt, NC Kellogg, GL TI Nanostructures - Self-assembled domain patterns SO NATURE LA English DT Article ID TRANSITIONS; SURFACE; LEED; PB C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Sandia Natl Labs, Livermore, CA 94551 USA. RP Plass, R (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 10 TC 150 Z9 150 U1 2 U2 23 PU MACMILLAN PUBLISHERS LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD AUG 30 PY 2001 VL 412 IS 6850 BP 875 EP 875 DI 10.1038/35091143 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 467EG UT WOS:000170689000033 PM 11528467 ER PT J AU Belitsky, AV Korchemsky, GP Sterman, G AF Belitsky, AV Korchemsky, GP Sterman, G TI Energy flow in QCD and event shape functions SO PHYSICS LETTERS B LA English DT Article DE QCD jets; hadronization; event shape distributions ID POWER CORRECTIONS; QUANTUM CHROMODYNAMICS; CROSS-SECTIONS; DISTRIBUTIONS; JETS AB Hadronization corrections to the thrust and related event shape distributions in the two-jet kinematical region of e(+)e(-) annihilation are summarized by nonperturbative shape functions. The moments of shape functions are given by universal matrix elements in QCD, which describe the energy flow in QCD final states. We show how the nonperturbative structure of these matrix elements may be inferred from resummed perturbation theory and Lorentz invariance. This analysis suggests the same functional forms for the shape functions as were found in phenomenological studies, and sheds light on the physical significance of the parameters that characterize these functions, (C) 2001 Published by Elsevier Science B.V. C1 SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA. Univ Paris 11, Phys Theor Lab, CNRS UMR 8627, F-91405 Orsay, France. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Belitsky, AV (reprint author), SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA. NR 26 TC 39 Z9 39 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 30 PY 2001 VL 515 IS 3-4 BP 297 EP 307 DI 10.1016/S0370-2693(01)00899-1 PG 11 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 468NC UT WOS:000170762900009 ER PT J AU Isgur, N Kostelecky, VA Szczepaniak, AP AF Isgur, N Kostelecky, VA Szczepaniak, AP TI Background enhancement of CPT reach at an asymmetric phi factory SO PHYSICS LETTERS B LA English DT Article ID HIGHER-DIMENSIONAL THEORIES; LOCAL LORENTZ INVARIANCE; SPATIAL ANISOTROPY; NEUTRAL KAON; TESTING CPT; VIOLATION; LIMITS; SYMMETRY; STRINGS; DECAYS AB Photoproduction of neutral-kaon pairs is studied from the perspective of CP and CPT studies. Interference of the P- and S-waves, with the former due to diffractive phi production and the latter to f(0)/a(0) production, is shown to enhance the CPT reach. Results are presented of Monte Carlo studies based on rates expected in future experiments. (C) 2001 Published by Elsevier Science B.V. C1 Jefferson Lab, Newport News, VA 23606 USA. Indiana Univ, Dept Phys, Bloomington, IN 47405 USA. Indiana Univ, Ctr Nucl Theory, Bloomington, IN 47405 USA. RP Isgur, N (reprint author), Jefferson Lab, MS 12H2, Newport News, VA 23606 USA. NR 72 TC 55 Z9 55 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 30 PY 2001 VL 515 IS 3-4 BP 333 EP 340 DI 10.1016/S0370-2693(01)00891-7 PG 8 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 468NC UT WOS:000170762900012 ER PT J AU Ellis, J Heinemeyer, S Olive, KA Weiglein, G AF Ellis, J Heinemeyer, S Olive, KA Weiglein, G TI Observability of the lightest CMSSM Higgs boson at hadron colliders SO PHYSICS LETTERS B LA English DT Article ID SUPERSYMMETRIC STANDARD MODEL; RADIATIVE-CORRECTIONS; FERMILAB TEVATRON; QCD CORRECTIONS; MSSM; MASSES; COUPLINGS; PROGRAM; LHC AB We discuss the observability of the lightest neutral Higgs boson in the constrained MSSM (CMSSM), with universal soft supersymmetry-breaking parameters, at hadron colliders such as the Tevatron and the LHC. We take account of the constraints on parameter space provided by LEP, the measured rate of g(mu) --> s gamma decay, the cosmological relic density Ohm chih(2), and the recent measurement of g(mu) - 2. We normalize products of the expected CMSSM Higgs production cross sections and decay branching ratios sigma x B relative to those expected for a Standard Model Higgs boson of the same mass. In the It yy channel, we find that [sigma (gg --> h) x B(h --> gamma gamma)](CMSSM) greater than or similar to0.85 x [sigma (gg --> h) x B(h --> gamma gamma)](SM). In the W+/-/(t) over bart + h, h --> (b) over barb channels, we find that [sigma (W+/-/(t) over bart + h) x B(h --> (b) over barb)](CMSSM) similar to 1.05 x [sigma (W +/-/(t) over bart + h) x B(h --> (b) over barb)](SM). We conclude that the lightest CMSSM Higgs boson should be almost as easy to see as the Standard Model Higgs boson: in particular, it should be discoverable with about 15 fb(-1) of luminosity at the Tevatron or 10 fb(-1) of luminosity at the LHC. (C) 2001 Elsevier Science B.V. All rights reserved. C1 CERN, Div TH, CH-1211 Geneva, Switzerland. Brookhaven Natl Lab, High Energy Theory Grp, Upton, NY 11973 USA. Univ Minnesota, Sch Phys & Astron, Inst Theoret Phys, Minneapolis, MN 55455 USA. Univ Durham, Inst Particle Phys Phenomenol, Durham DH1 3LR, England. RP Ellis, J (reprint author), CERN, Div TH, CH-1211 Geneva, Switzerland. NR 52 TC 42 Z9 42 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 30 PY 2001 VL 515 IS 3-4 BP 348 EP 358 DI 10.1016/S0370-2693(01)00823-1 PG 11 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 468NC UT WOS:000170762900014 ER PT J AU Cheng, HC Kaplan, DE Schmaltz, M Skiba, W AF Cheng, HC Kaplan, DE Schmaltz, M Skiba, W TI Deconstructing gaugino mediation SO PHYSICS LETTERS B LA English DT Article ID DYNAMICAL SUPERSYMMETRY BREAKING; ANOMALOUS MAGNETIC-MOMENT; SUPERGRAVITY; DIMENSIONS AB We present a model of supersymmetry breaking which produces gaugino masses and negligible scalar masses at a high scale. The model is inspired by "deconstructing" or "latticizing" models in extra dimensions where supersymmetry breaking and visible matter are spatially separated. We find a simple four-dimensional model which only requires two lattice sites (or gauge groups) to reproduce the phenomenology. (C) 2001 Published by Elsevier Science B.V. C1 Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Argonne Natl Lab, HEP Div, Argonne, IL 60439 USA. Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA. MIT, CTP, Cambridge, MA 02139 USA. RP Univ Chicago, Enrico Fermi Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA. EM hcheng@theory.uchicago.edu; dkaplan@theory.uchicago.edu; schmaltz@fnal.gov; skiba@mit.edu NR 25 TC 59 Z9 59 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD AUG 30 PY 2001 VL 515 IS 3-4 BP 395 EP 399 DI 10.1016/S0370-2693(01)00879-6 PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 468NC UT WOS:000170762900020 ER PT J AU Cooper, F Khare, A Rose, H AF Cooper, F Khare, A Rose, H TI Classical limit of time-dependent quantum field theory - a Schwinger-Dyson approach SO PHYSICS LETTERS B LA English DT Article ID EVOLUTION AB We rewrite the Martin-Siggia-Rose (MSR) formalism for the statistical dynamics of classical fields in a covariant second order form appropriate for the statistical dynamics of relativistic field theory. This second order formalism is related to a rotation of Schwinger's closed time path (CTP) formalism for quantum dynamics, with the main difference being that certain vertices are absent in the classical theory. These vertices are higher order in an ht expansion. The structure of the second order formulation of the Schwinger-Dyson (S-D) equations is identical to that of the rotated CTP formalism apart from initial conditions on the Green's functions and the absence of these vertices. We then discuss self-consistent truncation schemes based on keeping certain graphs in the two-particle irreducible effective action made up of bare vertices and exact Green's functions. (C) 2001 Published by Elsevier Science B.V. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Inst Phys, Bhubaneswar, Orissa 751005, India. RP Cooper, F (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. NR 23 TC 16 Z9 16 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 30 PY 2001 VL 515 IS 3-4 BP 463 EP 469 DI 10.1016/S0370-2693(01)00872-3 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 468NC UT WOS:000170762900031 ER PT J AU Dove, MFA Benkic, P Platte, C Richardson, TJ Bartlett, N AF Dove, MFA Benkic, P Platte, C Richardson, TJ Bartlett, N TI Concerning the crystal structure of BrF3 center dot AuF3 SO JOURNAL OF FLUORINE CHEMISTRY LA English DT Article DE BrF3 center dot AuF3; synthesis; vibrational spectroscopy; crystal structure ID BROMINE TRIFLUORIDE; AG(2); SALTS AB Crystals of the adduct, BrF3.AuF3, are monoclinic, with: a = 5.356(4) Angstrom, b = 5.766(4) Angstrom, c = 8.649(3) Angstrom, beta = 101.39(4)degrees, V = 261.8(5) Angstrom (3), z = 2, D-c = 4.96 g/cm(3) An ordered structure in P2(1) was found, but is of low precision (R-1 = 0.082) because of crystal deformation. The structure has planar BrF4 units sharing F ligands cis with planar AuF4 groups, each AuF4 being similarly linked to two BrF4. This generates a ribbon, creased at the bridging F along y, the gold on one side of the crease, the bromine on the other. Such ribbons are stacked parallel along y, with nearest neighbors related by twofold screw axes. This sandwiches each AuF4 strip of a ribbon symmetrically between like strips. These contacts between the Au-strips bring up, to each Au-atom, two "non-bridging Au-F ligands" of each of the two neighboring strips, to give eight coordination in F. The bromine side of the creased ribbon is unsymmetrically sandwiched between a screw-axis related relative, and the edge of a Au-containing strip oriented almost perpendicular to it. This brings two nonbridging F of the nearest-strip BrF4 and two non-bridging F of the AuF4 strip into the secondary coordination sphere of the Br atom. Raman spectra of the BrF3.AuF3, molecular BrF3, and polymeric AuF3 suggest that the Br-F and Au-F stretching vibrations of BrF3.AuF3 are shifted slightly from those of the parent BrF3 and AuF3, and indicate some BrF2+AuF4- character. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem, Div Chem Sci, Berkeley, CA 94720 USA. Jozef Stefan Inst, SI-1000 Ljubljana, Slovenia. RP Bartlett, N (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem, Div Chem Sci, Berkeley, CA 94720 USA. NR 18 TC 1 Z9 1 U1 0 U2 2 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0022-1139 J9 J FLUORINE CHEM JI J. Fluor. Chem. PD AUG 29 PY 2001 VL 110 IS 2 SI SI BP 83 EP 86 DI 10.1016/S0022-1139(01)00414-6 PG 4 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA 471TM UT WOS:000170944800002 ER PT J AU Fir, BA Mercier, HPA Sanders, JCP Dixon, DA Schrobilgen, GJ AF Fir, BA Mercier, HPA Sanders, JCP Dixon, DA Schrobilgen, GJ TI Structural and theoretical studies of Xe(OChF(5))(2) and [XeOChF(5)][AsF6] (Ch = Se, Te) SO JOURNAL OF FLUORINE CHEMISTRY LA English DT Article DE xenon; oxopentafluorotellurium(VI); oxopentafluoroselenium(VI); X-ray crystallography; density functional theory; vibrational spectroscopy ID NUCLEAR-MAGNETIC-RESONANCE; RAY CRYSTAL-STRUCTURE; EFFECTIVE CORE POTENTIALS; RAMAN-SPECTROSCOPY; BOND ORDERS; MOLECULAR CALCULATIONS; ELECTRON-DIFFRACTION; XENON(II) COMPOUNDS; TE-125 NMR; SCF THEORY AB The XeOSeF5+ cation has been synthesized for the first time and characterized in solution by F-19, Se-77 and Xe-129 NMR spectroscopy and in the solid state by X-ray crystallography and Raman spectroscopy with AsF6- as its counter anion. The X-ray crystal structures of the tellurium analogue and of the Xe(OChF(5))(2) derivatives have also been determined: [XeOChF(5)][AsF6] crystallize in tetragonal systems, P4/n, a=6.1356(l) Angstrom, c = 13.8232(2) Angstrom, V = 520.383(14) Angstrom (3), Z = 2 and R-1 = 0.0453 at -60 degreesC (Te) and a = 6.1195 (7) Angstrom, c = 13.0315 (2) Angstrom, V=488.01(8) Angstrom (3), Z = 2 and R-1 = 0.0730 at -113 degreesC (Se); Xe(OTeF5)(2) crystallizes in a monoclinic system, P2(i)/c, a = 10.289(2) Angstrom, b=9.605(2) Angstrom, c = 10.478(2) degrees, beta = 106.599(4)degrees, V = 992.3(3) Angstrom (3), Z = 4 and R-i = 0.0680 at -127 degreesC; Xe(OSeF5)(2) crystallizes in a triclinic system, R (3) over bar, a = 8.3859(6) Angstrom, c = 12.0355(13) Angstrom, V = 732.98(11) Angstrom (3), Z = 3 and R-1 = 0.0504 at -45 degreesC. The energy minimized geometries and vibrational frequencies of the XeOChF(5)(+) cations and Xe(OChF(5))(2) were calculated using density functional theory, allowing for definitive assignments of their experimental vibrational spectra. (C) 2001 Elsevier Science B.V. All rights reserved. C1 McMaster Univ, Dept Chem, Hamilton, ON L8S 4M1, Canada. Pacific NW Natl Lab, William R Wiley Environm Mol Sci Lab, Richland, WA 99352 USA. RP McMaster Univ, Dept Chem, 1280 Main St W, Hamilton, ON L8S 4M1, Canada. EM schrobil@mcmaster.ca NR 69 TC 17 Z9 17 U1 0 U2 0 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0022-1139 EI 1873-3328 J9 J FLUORINE CHEM JI J. Fluor. Chem. PD AUG 29 PY 2001 VL 110 IS 2 SI SI BP 89 EP 107 DI 10.1016/S0022-1139(01)00416-X PG 19 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA 471TM UT WOS:000170944800004 ER PT J AU Walters, KA Ley, KD Cavalaheiro, CSP Miller, SE Gosztola, D Wasielewski, MR Bussandri, AP van Willigen, H Schanze, KS AF Walters, KA Ley, KD Cavalaheiro, CSP Miller, SE Gosztola, D Wasielewski, MR Bussandri, AP van Willigen, H Schanze, KS TI Photophysics of pi-conjugated metal-organic oligomers: Aryleneethynylenes that contain the (bpy)Re(CO)(3)Cl chromophore SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID POLYMERS INCORPORATING 2,2'-BIPYRIDINES; CHARGE-TRANSFER CHROMOPHORES; ELECTRONIC-ENERGY TRANSFER; TRANSFER EXCITED-STATES; MOLECULAR SCALE WIRES; SOLID-PHASE SYNTHESES; OPTICAL-PROPERTIES; INTRAMOLECULAR ELECTRON; ALPHA-OLIGOTHIOPHENES; RUTHENIUM(II) COMPLEX AB A comprehensive study of a series of four monodisperse, metal-organic T-conjugated oligomers of varying length is reported. The oligomers are based on the aryleneethynylene architecture, and they contain a 2,2 ' -bipyridine-5,5 ' -diyl (bpy) metal binding unit. The photophysical properties of the free oligomers and their complexes with the (L)Re-I(CO)(3)X chromophore (where L = the bpy-oligomer and X = Cl or NCCH3) were explored by a variety of methods including electrochemistry, UV-visible absorption, variable temperature photoluminescence (PL), transient absorption (TA), and time-resolved electron paramagnetic spectroscopy (TREPR). The absorption of the free oligomers and the metal complexes is dominated by the pi,pi* transitions of the pi -conjugated oligomers. The free oligomers feature a strong blue fluorescence that is quenched entirely in the (L)Re-I(CO)3X complexes. The metal-oligomers feature a weak, relatively long-lived red photoluminescence that is assigned to emission from both the 3 pi,pi* manifold of the pi -conjugated system and the d pi Re --> pi* bpy-oligomer metal-to-ligand charge transfer ((MLCT)-M-3) state. On the basis of a detailed analysis of the PL, TA, and TREPR results an excited-state model is developed which indicates that the oligomer-based (3)pi,pi* state and the (MLCT)-M-3 states are in close energetic proximity. Consequently the photophysical properties reflect a composite of the properties of the two excited-state manifolds. C1 Univ Florida, Dept Chem, Gainesville, FL 32611 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. Northwestern Univ, Dept Chem, Evanston, IL 60208 USA. Univ Massachusetts, Dept Chem, Boston, MA 02125 USA. RP Schanze, KS (reprint author), Univ Florida, Dept Chem, POB 117200, Gainesville, FL 32611 USA. RI Gosztola, David/D-9320-2011; Cavalheiro, Carla/C-7741-2012; Schanze, Kirk/A-7200-2009; OI Gosztola, David/0000-0003-2674-1379; Cavalheiro, Carla/0000-0001-9952-4741; Schanze, Kirk/0000-0003-3342-4080; Walters, Keith/0000-0002-5997-1579 NR 85 TC 79 Z9 80 U1 1 U2 13 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 AUG 29 PY 2001 VL 123 IS 34 BP 8329 EP 8342 DI 10.1021/ja015813h PG 14 WC Chemistry, Multidisciplinary SC Chemistry GA 467XX UT WOS:000170730000017 PM 11516282 ER PT J AU Takano, H Porter, MD AF Takano, H Porter, MD TI Monitoring chemical transformations at buried organic interfaces by electric force microscopy SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID SURFACES; POTENTIOMETRY; DISULFIDES; MONOLAYER; FILMS C1 Iowa State Univ Sci & Technol, Ames Lab, US DOE, Dept Chem, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Microanalyt Instrumentat Ctr, Ames, IA 50011 USA. RP Porter, MD (reprint author), Iowa State Univ Sci & Technol, Ames Lab, US DOE, Dept Chem, Ames, IA 50011 USA. NR 17 TC 6 Z9 7 U1 0 U2 1 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 AUG 29 PY 2001 VL 123 IS 34 BP 8412 EP 8413 DI 10.1021/ja016353v PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 467XX UT WOS:000170730000032 PM 11516297 ER PT J AU Lee, Y Hriljac, JA Vogt, T Parise, JB Edmondson, MJ Anderson, PA Corbin, DR Nagai, T AF Lee, Y Hriljac, JA Vogt, T Parise, JB Edmondson, MJ Anderson, PA Corbin, DR Nagai, T TI Phase transition of zeolite RHO at high-pressure SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID X-RAY; POWDER DIFFRACTION; NEUTRON C1 SUNY Stony Brook, Dept Geosci, Stony Brook, NY 11794 USA. Univ Birmingham, Sch Chem, Birmingham B15 2TT, W Midlands, England. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Dupont Co Inc, Cent Res & Dev, Expt Stn, Wilmington, DE 19880 USA. Osaka Univ, Dept Earth & Space Sci, Toyonaka, Osaka 5600043, Japan. RP Parise, JB (reprint author), SUNY Stony Brook, Dept Geosci, Stony Brook, NY 11794 USA. RI Vogt, Thomas /A-1562-2011; Lee, Yongjae/K-6566-2016 OI Vogt, Thomas /0000-0002-4731-2787; NR 12 TC 33 Z9 33 U1 1 U2 16 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 29 PY 2001 VL 123 IS 34 BP 8418 EP 8419 DI 10.1021/ja0161554 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 467XX UT WOS:000170730000035 PM 11516300 ER PT J AU Schmidt, JAR Arnold, J AF Schmidt, JAR Arnold, J TI Reactivity of a tantalum-lithium alkylidene supported by an anionic triazacyclononane ligand SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID NIOBOCENE KETENE; IMIDO COMPLEXES; NIOBIUM; INSERTION; PINCER; PH; CO C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Arnold, J (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. RI Arnold, John/F-3963-2012 OI Arnold, John/0000-0001-9671-227X NR 24 TC 12 Z9 12 U1 0 U2 1 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 AUG 29 PY 2001 VL 123 IS 34 BP 8424 EP 8425 DI 10.1021/ja016143i PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 467XX UT WOS:000170730000038 PM 11516303 ER PT J AU Burnett, PDS Chambers, DM Heading, D Machacek, A Schnittker, M Moss, WC Young, P Rose, S Lee, RW Wark, JS AF Burnett, PDS Chambers, DM Heading, D Machacek, A Schnittker, M Moss, WC Young, P Rose, S Lee, RW Wark, JS TI Detailed simulations of sonoluminescence spectra SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Letter ID SINGLE-BUBBLE SONOLUMINESCENCE; CASIMIR LIGHT; EMISSION; MODEL AB We present detailed simulations of the optical spectra emitted from an argon plasma whose conditions correspond to those thought to prevail within sonoluminescing bubbles. The model incorporates detailed atomic physics based on atomic. data from the Opacity Project database, and includes bound-bound, bound-free and free-free transitions. Line broadening is treated using the modified semi-empirical method. The spectral model is used as a postprocessor of hydrodynamic simulations. While finding excellent agreement with the shape of experimental spectra, we calculate an intensity that is a factor of 100 greater than that in experiment. We also predict that whilst the majority of the optical emission corresponds to bound-free transitions, there remains the possibility of observing broad line emission in both the UV and IR regions of the spectrum. C1 Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. JET, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Burnett, PDS (reprint author), Univ Oxford, Dept Phys, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England. OI Rose, Steven/0000-0001-6808-6355 NR 34 TC 4 Z9 5 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-4075 J9 J PHYS B-AT MOL OPT JI J. Phys. B-At. Mol. Opt. Phys. PD AUG 28 PY 2001 VL 34 IS 16 BP L511 EP L518 DI 10.1088/0953-4075/34/16/102 PG 8 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 472BT UT WOS:000170963900002 ER PT J AU Kosmoski, JV Ackerman, EJ Smerdon, MJ AF Kosmoski, JV Ackerman, EJ Smerdon, MJ TI DNA repair of a single UV photoproduct in a designed nucleosome SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID NUCLEOTIDE EXCISION-REPAIR; RIBOSOMAL-RNA GENE; CORE DNA; 6-4 PHOTOPRODUCTS; XENOPUS OOCYTES; HUMAN CHROMATIN; BINDING; TRANSCRIPTION; SEQUENCE; DAMAGE AB Eukaryotic DNA repair enzymes must interact with the architectural hierarchy of chromatin. The challenge of finding damaged DNA complexed with histone proteins in nucleosomes is complicated by the need to maintain local chromatin structures involved in regulating other DNA processing events. The heterogeneity of lesions induced by DNA-damaging agents has led us to design homogeneously damaged substrates to directly compare repair of naked DNA with that of nucleosomes. Here we report that nucleotide excision repair in Xenopus nuclear extracts can effectively repair a single UV radiation photoproduct located 5 bases from the dyad center of a positioned nucleosome, although the nucleosome is repaired at about half the rate at which the naked DNA fragment is. Extract repair within the nucleosome is > 50-fold more rapid than either enzymatic photoreversal or endonuclease cleavage of the lesion in vitro. Furthermore, nucleosome formation occurs (after repair) only on damaged naked DNA (165-bp fragments) during a 1-h incubation in these extracts, even in the presence of a large excess of undamaged DNA. This is an example of selective nucleosome assembly by Xenopus nuclear extracts on a short linear DNA fragment containing a DNA lesion. C1 Washington State Univ, Sch Mol Biosci, Pullman, WA 99164 USA. Pacific NW Natl Lab, Mol Biosci Dept, Richland, WA 99352 USA. RP Smerdon, MJ (reprint author), Washington State Univ, Sch Mol Biosci, POB 644660, Pullman, WA 99164 USA. FU NIEHS NIH HHS [ES04106, R01 ES004106] NR 44 TC 38 Z9 38 U1 0 U2 0 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD AUG 28 PY 2001 VL 98 IS 18 BP 10113 EP 10118 DI 10.1073/pnas.181073398 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 468BJ UT WOS:000170738000020 PM 11517308 ER PT J AU Liao, XZ Zou, J Cockayne, DJH Wan, J Jiang, ZM Jin, G Wang, KL AF Liao, XZ Zou, J Cockayne, DJH Wan, J Jiang, ZM Jin, G Wang, KL TI Annealing effects on the microstructure of Ge/Si(001) quantum dots SO APPLIED PHYSICS LETTERS LA English DT Article ID INTERDIFFUSION; SUPERLATTICES; ISLANDS; EELS AB Ge/Si(001) multilayer islands produced by gas-source molecular-beam epitaxy at 575 degreesC were investigated using energy-filtering transmission electron microscopy. Results show, for as-grown samples, not only a continuous enlargement of island size in upper layers but also a continuous increase of Ge concentration within islands in upper layers. As a result of the increasing island size and Ge concentration within the islands, the island density in upper layers decreases. For samples annealed at 900 degreesC for 5 min, the aspect ratio of buried islands increases significantly, and the average Ge concentration within islands of different layers becomes uniform. (C) 2001 American Institute of Physics. C1 Univ Sydney, Australian Key Ctr Microscopy & Microanal, Sydney, NSW 2006, Australia. Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. Univ Oxford, Dept Mat, Oxford OX1 3PH, England. Univ Calif Los Angeles, Dept Elect Engn, Device Res Lab, Los Angeles, CA 90095 USA. Fudan Univ, Surface Phys Lab, Shanghai 200433, Peoples R China. RP Liao, XZ (reprint author), Univ Sydney, Australian Key Ctr Microscopy & Microanal, Sydney, NSW 2006, Australia. RI Liao, Xiaozhou/B-3168-2009; Zou, Jin/B-3183-2009 OI Liao, Xiaozhou/0000-0001-8565-1758; Zou, Jin/0000-0001-9435-8043 NR 19 TC 16 Z9 18 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 27 PY 2001 VL 79 IS 9 BP 1258 EP 1260 DI 10.1063/1.1398615 PG 3 WC Physics, Applied SC Physics GA 465LQ UT WOS:000170590800012 ER PT J AU Venezia, VC Pelaz, L Gossmann, HJL Haynes, TE Rafferty, CS AF Venezia, VC Pelaz, L Gossmann, HJL Haynes, TE Rafferty, CS TI Binding energy of vacancy clusters generated by high-energy ion implantation and annealing of silicon SO APPLIED PHYSICS LETTERS LA English DT Article ID TRANSIENT ENHANCED DIFFUSION; POINT-DEFECTS; SI; DOPANTS; SB AB We have measured the evolution of the excess-vacancy region created by a 2 MeV, 10(16)/cm(2) Si implant in the silicon surface layer of silicon-on-insulator substrates. Free vacancy supersaturations were measured with Sb dopant diffusion markers during postimplant annealing at 700, 800, and 900 degreesC, while vacancy clusters were detected by Au labeling. We demonstrate that a large free vacancy supersaturation exists for short times, during the very early stages of annealing between the surface and the buried oxide (1 mum below). Afterwards, the free vacancy concentration returns to equilibrium in the presence of vacancy clusters. These vacancy clusters form at low temperatures and are stable to high temperatures, i.e., they have a low formation energy and high binding energy. (C) 2001 American Institute of Physics. C1 Lucent Technol, Bell Labs, Murray Hill, NJ 07974 USA. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. Univ Valladolid, Valladolid 49011, Spain. RP Venezia, VC (reprint author), Philips Res Leuven, Kapledreef 75, B-3001 Louvain, Belgium. RI Pelaz, Lourdes/M-1766-2014; Haynes, Tony/P-8932-2015 OI Haynes, Tony/0000-0003-2871-4745 NR 16 TC 20 Z9 20 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 27 PY 2001 VL 79 IS 9 BP 1273 EP 1275 DI 10.1063/1.1385192 PG 3 WC Physics, Applied SC Physics GA 465LQ UT WOS:000170590800017 ER PT J AU Seong, MJ Mascarenhas, A Geisz, JF AF Seong, MJ Mascarenhas, A Geisz, JF TI Gamma-L-X mixed symmetry of nitrogen-induced states in GaAs1-xNx probed by resonant Raman scattering SO APPLIED PHYSICS LETTERS LA English DT Article ID BAND-GAP REDUCTION; DOPED GAAS; ALLOYS; TRANSITIONS; GIANT AB A resonant Raman scattering study near the nitrogen-induced E+ state in GaAs1-xNx at 80 K with special emphasis on all the zone-boundary phonons is used to investigate the full symmetry of the E+ state. We have observed that various phonons at the L- and X-zone boundaries not only emerge as strong and sharp Raman features for excitations near the E+ transition but also exhibit the same intensity resonance enhancement as observed for the zone center phonons, longitudinal-optical (Gamma) and transverse-optical (Gamma). Our data provide strong evidence of significant L and X components in the wave function of the nitrogen-induced E+ state in GaAs1-xNx. (C) 2001 American Institute of Physics. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Seong, MJ (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. EM mseong@nrel.gov NR 23 TC 26 Z9 27 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 27 PY 2001 VL 79 IS 9 BP 1297 EP 1299 DI 10.1063/1.1399010 PG 3 WC Physics, Applied SC Physics GA 465LQ UT WOS:000170590800025 ER PT J AU Welp, U Vlasko-Vlasov, VK Crabtree, GW Thompson, C Metlushko, V Ilic, B AF Welp, U Vlasko-Vlasov, VK Crabtree, GW Thompson, C Metlushko, V Ilic, B TI Magnetic domain formation in perforated permalloy films SO APPLIED PHYSICS LETTERS LA English DT Article ID CROSS-TIE WALL; FORCE MICROSCOPY; ANTIDOT ARRAYS; THIN-FILMS; ANISOTROPY AB The magnetization behavior of permalloy films containing a square array of holes has been studied using magnetometry, magneto-optical imaging, and magnetic force microscopy. Two types of domain boundaries are observed. The hole array induces a strongly pinned, complex domain structure on the microscopic level (i.e., within one unit cell of the hole array). We show that magnetization reversal occurs through the nucleation and motion of a domain wall that separates areas of oppositely polarized microscopic domain patterns. These walls display highly mobile kinks that induce the reversal of the microscopic patterns. The interplay between intrinsic anisotropy and pinning by the hole array induces a pronounced anisotropy in the domain patterns and switching mechanism. (C) 2001 American Institute of Physics. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA. Univ Illinois, Dept Elect Engn & Comp Sci, Chicago, IL 60607 USA. Cornell Univ, Sch Appl & Engn Phys, Ithaca, NY 14853 USA. RP Welp, U (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Ilic, Rob/N-1359-2014; OI Thompson, Carol/0000-0003-3832-4855 NR 16 TC 38 Z9 38 U1 0 U2 8 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 27 PY 2001 VL 79 IS 9 BP 1315 EP 1317 DI 10.1063/1.1396623 PG 3 WC Physics, Applied SC Physics GA 465LQ UT WOS:000170590800031 ER PT J AU Park, JW McEuen, PL AF Park, JW McEuen, PL TI Formation of a p-type quantum dot at the end of an n-type carbon nanotube SO APPLIED PHYSICS LETTERS LA English DT Article ID SINGLE; WIRES; TRANSPORT; ROPES AB We use field effect doping to study both electron- (n) and hole- (p) type conduction in a semiconducting carbon nanotube. We find that, in the n-type region, the ends of the tube remain p- type due to doping by the metal contacts. As a result, a p-n junction forms near the contact, creating a small, p-type quantum dot between the p-n junction and the contact. This zero-dimensional quantum dot at the end of a one-dimensional semiconductor is the reduced dimensional analog of the two-dimensional inversion layer that forms at the boundary of a gated three-dimensional semiconductor. (C) 2001 American Institute of Physics. C1 Cornell Univ, Atom & Solid State Phys Lab, Ithaca, NY 14853 USA. RP Park, JW (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. EM mceuen@ccmr.cornell.edu RI Park, Jiwoong/C-2327-2013 NR 17 TC 70 Z9 71 U1 1 U2 7 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 27 PY 2001 VL 79 IS 9 BP 1363 EP 1365 DI 10.1063/1.1396318 PG 3 WC Physics, Applied SC Physics GA 465LQ UT WOS:000170590800047 ER PT J AU Eagle, AA Tiekink, ERT George, GN Young, CG AF Eagle, AA Tiekink, ERT George, GN Young, CG TI Synthesis, characterization, and electrochemistry of cis-oxothio- and cis-bis(thio)tungsten(VI) complexes of hydrotris(3,5-dimethylpyrazol-1-yl)borate SO INORGANIC CHEMISTRY LA English DT Article ID OXYGEN-ATOM TRANSFER; ALDEHYDE FERREDOXIN OXIDOREDUCTASE; ABSORPTION FINE-STRUCTURE; RAY CRYSTAL-STRUCTURE; IRON-SULFUR PROTEIN; X-RAY; DIOXOMOLYBDENUM(VI) COMPLEXES; XANTHINE-OXIDASE; HYDROTRIS(3,5-DIMETHYL-1-PYRAZOLYL)BORATE LIGAND; HYPERTHERMOPHILIC ARCHAEBACTERIUM AB The complexes Tp*WO2X react with sulfiding agents such as B2S3 or P4S10 to give the oxothio- and bis(thio)tungsten(VI) complexes Tp*WOSX (X = Cl-) and Tp*WS2X [X = Cl, S2PPh2-; Tp* = hydrotris(3,5-dimethylpyrazol-1-yl)borate]. The reaction of Tp*WS2Cl with (i) PPh3 in pyridine and (ii) dimethyl sulfoxide affords Tp*WOSCl in good overall yield. The chloro complexes undergo metathesis with alkali metal salts to yield species of the type Tp*WOSX and Tp*WS2X [X = OPh-, SPh-, SePh-, (-)-mentholate]. The diamagnetic complexes exhibit NMR spectra indicative of C-1 (Tp*WOSX) or C-s (Tp*WS2X) Symmetry and IR spectra consistent with terminal oxo and thio ligation (v(W=O), 940-925 cm(-1); v(W=S) or V(WS2), 495-475 cm(-1)). Crystals of (R,S)-Tp*WOS {(-)-mentholate} are monoclinic, space group P2(1), with a = 11.983(2) Angstrom, b = 18.100(3) Angstrom, c 13.859(3) Angstrom, beta = 91.60(2) degrees ,V = 3004.6(8) Angstrom (3), and Z = 4. Crystals of Tp*WS2(OPh)-CH2Cl2 are orthorhombic, space group Pbca, with a 16.961(4) Angstrom, b = 33.098(7) Angstrom, c = 9.555(2) Angstrom, V = 5364(2) Angstrom (3), and Z = 8. The mononuclear, distorted-octahedral tungsten centers are coordinated by a tridentate Tp* ligand, an alkoxy or aryloxy ligand, and two terminal chalcogenide ligands. The average W=O and W=S distances are 1.726(7) and 2.125(2) Angstrom, respectively, and the O=W=S and S=W=S angles 102.9(3) and 102.9(1)degrees, respectively. The tungsten and sulfur X-ray absorption spectra of Tp*WOSCl and Tp*WS2Cl are consistent with the presence of terminal pi -bonded thio ligands in both complexes. The thio complexes generally undergo a reversible one-electron reduction at potentials significantly more positive than their oxo analogues. The chemical, spectroscopic, and electrochemical properties of the complexes are heavily influenced by the presence of W=S pi* frontier orbitals. C1 Univ Melbourne, Sch Chem, Melbourne, Vic 3010, Australia. Univ Adelaide, Dept Chem, Adelaide, SA 5005, Australia. Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA. RP Young, CG (reprint author), Univ Melbourne, Sch Chem, Melbourne, Vic 3010, Australia. RI George, Graham/E-3290-2013 NR 84 TC 22 Z9 22 U1 0 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD AUG 27 PY 2001 VL 40 IS 18 BP 4563 EP 4573 DI 10.1021/ic010084s PG 11 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 466JN UT WOS:000170642600012 PM 11511200 ER PT J AU Mizoguchi, TJ Kuzelka, J Spingler, B DuBois, JL Davydov, RM Hedman, B Hodgson, KO Lippard, SJ AF Mizoguchi, TJ Kuzelka, J Spingler, B DuBois, JL Davydov, RM Hedman, B Hodgson, KO Lippard, SJ TI Synthesis and spectroscopic studies of non-heme diiron(III) species with a terminal hydroperoxide ligand: Models for hemerythrin SO INORGANIC CHEMISTRY LA English DT Article ID ABSORPTION FINE-STRUCTURE; METHANE MONOOXYGENASE; RIBONUCLEOTIDE REDUCTASE; PARAMAGNETIC-RESONANCE; DIOXYGEN COMPLEXES; METAL-COMPLEXES; ACTIVE-SITE; IRON CENTER; OXO; BIOLOGY AB Two compounds, [Fe-2(mu -OH)(mu -Ph(4)DBA)(TMEDA)(2)(OTf)] (4) and [Fe-2(mu -OH)(mu -Ph(4)DBA)(DPE)(2)(OTf)] (7), where Ph(4)DBA(2-) is the dinucleating bis(carboxylate) ligand dibenzofuran-4,6-bis(diphenylacetate), have been prepared as synthetic models for the dioxygen-binding non-heme diiron protein hemerythrin (Hr). X-ray crystallography reveals that, in the solid state, these compounds contain the asymmetric coordination environment found at the diiron center in the reduced form of the protein, deoxyHr. Mossbauer spectra of the models (4, delta = DeltaE(Q) = 2.87(2) min s(-1); 7, delta (av), = 1.23(1), DeltaE(Qav) = 2.79(1) mm s(-1)) and deoxyHr (delta = 1.19, DeltaE(Q) = 2.81 s(-1)) are also in good agreement. Oxygenation of the diiron(II) complexes dissolved in CH2Cl2 containing 3 equiv of N-MeIm (4) or neat EtCN (7) at -78 'C affords a red-orange solution with optical bands at 336 nm (7300 M-1 cm(-1)) and 470 nm (2600 M-1 cm(-1)) for 4 and at 334 run (6400 M-1 cm(-1)) and 484 nm (2350 M-1 cm(-1)) for 7. These spectra are remarkably similar to that of oxyHr, 330 nm (6800 M-1 cm(-1)) and 500 ran (2200 M-1 cm(-1)). The electron paramagnetic resonance (EPR) spectrum of the cryoreduced, mixed-valence dioxygen adduct of 7 displays properties consistent with a (mu -oxo)diiron(II,III) core. An investigation of 7 and its dioxygen-bound adduct by extended X-ray absorption fine structure (EXAFS) spectroscopy indicates that the oxidized species contains a (mu -oxo)diiron(III) core with iron-ligand distances in agreement with those expected for oxide, carboxylate, and amine/hydroperoxide donor atoms. The analogous cobalt complex [Co-2(mu -OH)(mu -Ph(4)DBA)-(TMEDA)(2)(OTf)] (6) was synthesized and structurally characterized, but it was unreactive toward dioxygen. C1 Northwestern Univ, Dept Chem, Evanston, IL 60208 USA. MIT, Dept Chem, Cambridge, MA 02139 USA. Stanford Univ, Dept Chem, Stanford, CA 94305 USA. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Davydov, RM (reprint author), Northwestern Univ, Dept Chem, Evanston, IL 60208 USA. OI Spingler, Bernhard/0000-0003-3402-2016 FU NCRR NIH HHS [RR-01209]; NIGMS NIH HHS [GM32134] NR 51 TC 25 Z9 25 U1 0 U2 10 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 AUG 27 PY 2001 VL 40 IS 18 BP 4662 EP 4673 DI 10.1021/ic010076b PG 12 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 466JN UT WOS:000170642600025 PM 11511213 ER PT J AU Suszcynsky, DM Light, TE Davis, S Green, JL Guillen, JLL Myre, W AF Suszcynsky, DM Light, TE Davis, S Green, JL Guillen, JLL Myre, W TI Coordinated observations of optical lightning from space using the FORTE photodiode detector and CCD imager SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID SATELLITE; CLOUDS AB This paper presents an overview of the coordinated observation of optical lightning from space using the photodiode detector (PDD) and CCD-based imager known as the Lightning Location System (LLS) aboard the Fast On-Orbit Recording of Transient Events (FORTE) satellite. PDD/LLS coincidence statistics are presented and show that both the detected energy density and the detected peak irradiance of optical lightning events are proportional to the number of LLS pixels (pixel multiplicity) which are activated during the event. The inference is that LLS pixel multiplicity is more a function of the detected intensity and horizontal extent of the optical event rather than a direct indicator of the degree of scattering. PDD/LLS event coincidence is also used to improve upon traditional recurrence/clustering algorithms that discriminate against false LLS events due to energetic particles and glint. Energy density measurements of coincident events show that about 4% of the optical energy detected by the broadband PDD appears in the narrowband LLS. This is in general agreement with ground-based measurements and with assumptions incorporated into the design of current and planned CCD-imaging sensors. C1 Los Alamos Natl Lab, Space & Atmospher Sci Grp, Los Alamos, NM 87545 USA. Univ Tulsa, Dept Phys & Engn, Tulsa, OK 74104 USA. Sandia Natl Labs, Sensors & Elect Dept, Albuquerque, NM 87185 USA. RP Suszcynsky, DM (reprint author), Los Alamos Natl Lab, Space & Atmospher Sci Grp, MS D466, Los Alamos, NM 87545 USA. EM dsuszcynsky@lanl.gov RI Davis, Sean/C-9570-2011 OI Davis, Sean/0000-0001-9276-6158 NR 24 TC 28 Z9 30 U1 0 U2 4 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-897X J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD AUG 27 PY 2001 VL 106 IS D16 BP 17897 EP 17906 DI 10.1029/2001JD900199 PG 10 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 465FR UT WOS:000170579400015 ER PT J AU Li, YF Bidleman, TF Barrie, LA AF Li, YF Bidleman, TF Barrie, LA TI Toxaphene in the United States 2. Emissions and residues SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID GREAT-LAKES; ORGANOCHLORINE PESTICIDES; POLYCHLORINATED-BIPHENYLS; ATMOSPHERIC DEPOSITION; CENTRAL-AMERICA; AMBIENT AIR; EXCHANGE; CANADA; WATER; HEXACHLOROCYCLOHEXANE AB Emission factors of toxaphene for spraying and tilling events are distributed for the United States on a 1 degrees x1 degrees latitude and longitude grid system. By using the gridded usage and emission factors, inventories of gridded toxaphene emissions and residues in agricultural soil in the United States with 1/6 degrees x 1/4 degrees latitude and longitude resolution have been created. Total toxaphene emissions were around 190 kt between 1947 and 1999. At the beginning of 2000, almost 20 years after banning the use of toxaphene, there were still around 29 kt of toxaphene left in the agricultural soil, of which 360 t will emit to the air in 2000. The calculated toxaphene emissions and residues are in general consistent with published monitoring data. The trends of toxaphene emissions due to current use and residues in agricultural soil in the United States match both the historical atmospheric input function for toxaphene extending over the past 40 years derived from the composition of toxaphene in peat core from eastern Minnesota to Nova Scotia, and the trends of air concentration of toxaphene in the Arctic. This indicates that toxaphene residues in the United States agricultural soil could be a major source of toxaphene in the Canadian Arctic and the Great Lakes region. C1 Environm Canada, Modelling & Integrat Res Div, Meteorol Serv Canada, Downsview, ON M3H 5T4, Canada. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99362 USA. Environm Canada, Proc Res Div, Air Qual Res Branch, Meteorol Serv Canada, Downsview, ON M3H 5T4, Canada. RP Li, YF (reprint author), Environm Canada, Modelling & Integrat Res Div, Meteorol Serv Canada, 4905 Dufferin St, Downsview, ON M3H 5T4, Canada. RI Bidleman, Terry/F-6287-2011 OI Bidleman, Terry/0000-0001-7469-0532 NR 52 TC 32 Z9 32 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0747-7309 J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD AUG 27 PY 2001 VL 106 IS D16 BP 17929 EP 17938 DI 10.1029/2000JD900823 PG 10 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 465FR UT WOS:000170579400018 ER PT J AU Husar, RB Tratt, DM Schichtel, BA Falke, SR Li, F Jaffe, D Gasso, S Gill, T Laulainen, NS Lu, F Reheis, MC Chun, Y Westphal, D Holben, BN Gueymard, C McKendry, I Kuring, N Feldman, GC McClain, C Frouin, RJ Merrill, J DuBois, D Vignola, F Murayama, T Nickovic, S Wilson, WE Sassen, K Sugimoto, N Malm, WC AF Husar, RB Tratt, DM Schichtel, BA Falke, SR Li, F Jaffe, D Gasso, S Gill, T Laulainen, NS Lu, F Reheis, MC Chun, Y Westphal, D Holben, BN Gueymard, C McKendry, I Kuring, N Feldman, GC McClain, C Frouin, RJ Merrill, J DuBois, D Vignola, F Murayama, T Nickovic, S Wilson, WE Sassen, K Sugimoto, N Malm, WC TI Asian dust events of April 1998 SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID NORTH PACIFIC; HAWAIIAN-ISLANDS; ECOSYSTEM DEVELOPMENT; CHANGING SOURCES; AIR-POLLUTION; MAUNA-LOA; TRANSPORT; AEROSOL; OCEAN; NETWORK AB On April 15 and 19, 1998, two intense dust storms were generated over the Gobi desert by springtime low-pressure systems descending from the northwest. The windblown dust was detected and its evolution followed by its yellow color on SeaWiFS satellite images, routine surface-based monitoring, and through serendipitous observations. The April 15 dust cloud was recirculating, and it was removed by a precipitating weather system over east Asia. The April 19 dust cloud crossed the Pacific Ocean in 5 days, subsided to the surface along the mountain ranges between British Columbia and California, and impacted severely the optical and the concentration environments of the region. In east Asia the dust clouds increased the albedo over the cloudless ocean and land by up to 10-20%, but it reduced the near-UNI cloud reflectance, causing a yellow coloration of all surfaces. The yellow colored backscattering by the dust eludes a plausible explanation using simple Mie theory with constant refractive index. Over the West Coast the dust layer has increased the spectrally uniform optical depth to about 0.4, reduced the direct solar radiation by 30-40%, doubled the diffuse radiation, and caused a whitish discoloration of the blue sky. On April 29 the average excess surface-level dust aerosol concentration over the valleys of the West Coast was about 20-50 mug/m(3) with local peaks > 100 mug/m(3). The dust mass mean diameter was 2-3 mum, and the dust chemical fingerprints were evident throughout the West Coast and extended to Minnesota. The April 1998 dust event has impacted the surface aerosol concentration 2-4 times more than any other dust event since 1988. The dust events were observed and interpreted by an ad hoc international web-based virtual community. It would be useful to set up a community-supported web-based infrastructure to monitor the global aerosol pattern for such extreme aerosol events, to alert and to inform the interested communities, and to facilitate collaborative analysis for improved air quality and disaster management. C1 Washington Univ, Ctr Air Pollut Impact & Trend Anal, St Louis, MO 63130 USA. CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA. Univ Washington, Seattle, WA 98195 USA. Texas Tech Univ, Dept Geosci, Lubbock, TX 79409 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. China Meteorol Adm, Natl Satellite Meteorol Ctr, Beijing, Peoples R China. US Geol Survey, Washington, DC 20242 USA. Meteorol Res Inst, Seoul, South Korea. Naval Res Lab, Monterey, CA 93943 USA. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Univ Cent Florida, Orlando, FL 32816 USA. Univ British Columbia, Dept Geog, Vancouver, BC, Canada. Univ San Diego, Scripps Inst Oceanog, La Jolla, CA 92110 USA. Univ Rhode Isl, Ctr Atmospher Chem Studies, Kingston, RI 02881 USA. New Mexico Environm Dept, Air Qual Bur, Santa Fe, NM 87505 USA. Univ Oregon, Solar Monitoring Lab, Eugene, OR 97403 USA. Tokyo Univ Mercantile Marine, Dept Phys, Tokyo, Japan. Univ Malta, Euro Mediterranean Ctr Insular Coastal Dynam ICoD, Valletta, Malta. US EPA, Natl Ctr Environm Assessment, Res Triangle Pk, NC 27711 USA. Univ Utah, Dept Meteorol, Salt Lake City, UT 84112 USA. Natl Inst Environm Studies, Tsububa, Iburaki, Japan. Colorado State Univ, NPS Air Resources Div, Ft Collins, CO 80521 USA. RP Husar, RB (reprint author), Washington Univ, Ctr Air Pollut Impact & Trend Anal, Campus Box 1124, St Louis, MO 63130 USA. RI Husar, Rudolf/A-9000-2009; Tratt, David/A-7884-2009; Sugimoto, Nobuo/C-5189-2015; DuBois, David/F-6380-2015; Gasso, Santiago/H-9571-2014; OI Tratt, David/0000-0002-3942-6848; Sugimoto, Nobuo/0000-0002-0545-1316; DuBois, David/0000-0003-2560-505X; Gasso, Santiago/0000-0002-6872-0018; Gill, Thomas E/0000-0001-9011-4105 NR 51 TC 485 Z9 519 U1 7 U2 63 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0747-7309 J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD AUG 27 PY 2001 VL 106 IS D16 BP 18317 EP 18330 DI 10.1029/2000JD900788 PG 14 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 465FR UT WOS:000170579400046 ER PT J AU Sinha, SK AF Sinha, SK TI Theory of inelastic x-ray scattering from condensed matter SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article AB We review the basic formation for the inelastic scattering of x-rays by matter. The differential cross sections are related to the scattering function S(q, omega), which in turn can be expressed in terms of various correlation functions and response functions of the electron system. We show how the scattering by electronic excitations may be related to the dielectric function of the electron gas at high energy transfers, while at low energy transfers we derive the cross section for scattering by phonon excitations. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Sinha, SK (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. NR 14 TC 20 Z9 20 U1 1 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 27 PY 2001 VL 13 IS 34 BP 7511 EP 7523 DI 10.1088/0953-8984/13/34/304 PG 13 WC Physics, Condensed Matter SC Physics GA 470EL UT WOS:000170857400005 ER PT J AU Sinn, H AF Sinn, H TI Spectroscopy with meV energy resolution SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID X-RAY-SCATTERING AB Inelastic x-ray scattering has become a powerful tool in condensed matter physics in recent years. This is due to the advent of the third-generation synchrotron radiation sources, which provide an intense and collimated x-ray beam, and due to improvements in x-ray optics. This article is an introduction to the basic principles of inelastic x-ray scattering with meV resolution. In particular the geometric and crystal contributions for monochromator and analyser crystals are discussed. Also, an estimation of phonon intensities, obtained with a meV spectrometer, is derived. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Sinn, H (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. NR 20 TC 26 Z9 26 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 27 PY 2001 VL 13 IS 34 BP 7525 EP 7537 DI 10.1088/0953-8984/13/34/305 PG 13 WC Physics, Condensed Matter SC Physics GA 470EL UT WOS:000170857400006 ER PT J AU Alp, EE Sturhahn, W Toellner, TS AF Alp, EE Sturhahn, W Toellner, TS TI Lattice dynamics and inelastic nuclear resonant x-ray scattering SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID SYNCHROTRON-RADIATION; THIN-FILMS; ABSORPTION AB Measurements of thermal and elastic properties of materials, such as the phonon density of states, specific heat, and speed of sound, by a new xray scattering technique are presented. Inelastic nuclear resonant scattering of x-rays produced from new electron storage rings, coupled with advances in high-energy-resolution crystal optics, and fast detectors have enabled the development of a new method of analysing the energy loss in a scattering process with a resolution of 10(7) or better in the x-ray region of 6-30 keV. Some unique aspects such as element (isotope) selectivity, the amount of material needed for analysis (nanograms), and the physical size to which x-rays can be focused (5 mum or better) favour this approach over the more established techniques of neutron scattering and Mossbauer and Raman spectroscopy. Applications to several unique cases-for example, those of multilayers. and high pressure-are discussed. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Alp, EE (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. NR 30 TC 16 Z9 16 U1 1 U2 7 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 27 PY 2001 VL 13 IS 34 BP 7645 EP 7658 DI 10.1088/0953-8984/13/34/311 PG 14 WC Physics, Condensed Matter SC Physics GA 470EL UT WOS:000170857400012 ER PT J AU Sage, JT Paxson, C Wyllie, GRA Sturhahn, W Durbin, SM Champion, PM Alp, EE Scheidt, WR AF Sage, JT Paxson, C Wyllie, GRA Sturhahn, W Durbin, SM Champion, PM Alp, EE Scheidt, WR TI Nuclear resonance vibrational spectroscopy of a protein active-site mimic SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID SOLUBLE GUANYLATE-CYCLASE; SYNCHROTRON-RADIATION; NITRIC-OXIDE; MOLECULAR STEREOCHEMISTRY; GAMMA-RAYS; SUM-RULES; SCATTERING; ABSORPTION; MYOGLOBIN; DYNAMICS AB For many years, Mossbauer spectroscopy has been applied to measure recoilless absorption of x-ray photons by nuclei. Recently, synchrotron radiation sources have enabled the observation of weaker features separated from the recoilless resonance by the energy of vibrational quanta. This enables a form of vibrational spectroscopy with a unique sensitivity to the probe nucleus. Biological applications are particularly promising, because it is possible to selectively probe vibrations of a single atom at the active site of a complex biomolecule, while avoiding interference from the vibrations of thousands of other atoms. In contrast with traditional site-selective vibrational spectroscopies, nuclear resonance vibrational spectroscopy (NRVS) is not hampered by solvent interference and faces selection rule limitations only if the probe nucleus lies on a symmetry element. Here, we formulate a mathematical language appropriate for understanding NRVS measurements on molecular systems and apply it to analyse NRVS data recorded on ferrous nitrosyl tetraphenylporphyrin, Fe(TPP)(NO). This compound mimics the haem group found at the active site of many proteins involved in the biological usage of oxygen and nitric oxide. Measurements on such model compounds provide a baseline for evaluating the extent to which vibrations are localized at the active site of a protein, with the goal of elucidating the mechanisms of biological processes, such as intersite communication in allosteric proteins. C1 Northeastern Univ, Dept Phys, Boston, MA 02115 USA. Northeastern Univ, Ctr Interdisciplinary Res Complex Syst, Boston, MA 02115 USA. Univ Notre Dame, Dept Chem, Notre Dame, IN 46556 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA. RP Sage, JT (reprint author), Northeastern Univ, Dept Phys, Boston, MA 02115 USA. EM jtsage@neu.edu NR 42 TC 91 Z9 91 U1 1 U2 14 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 27 PY 2001 VL 13 IS 34 BP 7707 EP 7722 DI 10.1088/0953-8984/13/34/315 PG 16 WC Physics, Condensed Matter SC Physics GA 470EL UT WOS:000170857400016 ER PT J AU Mao, HK Kao, CC Hemley, RJ AF Mao, HK Kao, CC Hemley, RJ TI Inelastic x-ray scattering at ultrahigh pressures SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID EARTHS INNER-CORE; MAGNETIC CIRCULAR-DICHROISM; CHARGE-TRANSFER EXCITATIONS; RESONANT RAMAN-SCATTERING; DYNAMIC STRUCTURE FACTOR; GPA 1.4 MBAR; MEGABAR PRESSURES; SOLID HYDROGEN; MOLECULAR-HYDROGEN; PHONON-DISPERSION AB Inelastic x-ray scattering (IXS) provides high-pressure research with an arsenal of analytical capabilities for key measurements that were previously unattainable, and high-pressure research provides IXS with numerous applications. where the technique has unique advantages over other methods. High-pressure investigations can now be conducted using non-resonant IXS, resonant IXS, nuclear resonant IXS and x-ray emission spectroscopy with energy resolutions of 100 meV to 1 eV for electronic transitions and I to 10 meV for phonon studies. By pressure-tuning materials over a wide range, we are able to investigate fundamental properties of the electron gas, strongly correlated electron systems, high-energy electronic excitations and phonons in energy and momentum space. The results have important implications for a variety of materials problem applications as well as providing basic information for understanding the deep interior of the Earth and other planets. C1 Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA. Carnegie Inst Sci, HPCAT, Washington, DC 20015 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Carnegie Inst Sci, Geophys Lab, 5251 Broad Branch Rd NW, Washington, DC 20015 USA. NR 96 TC 28 Z9 28 U1 1 U2 10 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 EI 1361-648X J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 27 PY 2001 VL 13 IS 34 BP 7847 EP 7858 DI 10.1088/0953-8984/13/34/323 PG 12 WC Physics, Condensed Matter SC Physics GA 470EL UT WOS:000170857400024 ER PT J AU Carena, M Delgado, A Lykken, J Pokorski, S Quiros, M Wagner, CEM AF Carena, M Delgado, A Lykken, J Pokorski, S Quiros, M Wagner, CEM TI Brane effects on extra-dimensional scenarios: a tale of two gravitons SO NUCLEAR PHYSICS B LA English DT Article ID INDUCED GRAVITATIONAL CONSTANT; MILLIMETER; BREAKING; SPACE AB We analyze the propagation of a scalar field in multidimensional theories which include kinetic corrections in the brane, as a prototype for gravitational interactions in a four-dimensional brane located in a (nearly) flat extra-dimensional bulk. We regularize the theory by introducing an infrared cutoff given by the size of the extra dimensions, R, and a physical ultraviolet cutoff of the order of the fundamental Planck scale in the higher-dimensional theory, M. We show that, having implemented cutoffs, the radius of the extra dimensions cannot be arbitrarily large for M greater than or similar to 1 TeV. Moreover, for finite radii, the gravitational effects localized on the brane can substantially alter the phenomenology of collider and/or table-top gravitational experiments. This phenomenology is dictated by the presence of a massless graviton, with standard couplings to the matter fields, and a massive graviton which couples to matter in a much stronger way. While graviton KK modes lighter than the massive graviton couple to matter in a standard way, the couplings to matter of the heavier KK modes are strongly suppressed. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Argonne Natl Lab, HEP Div, Argonne, IL 60439 USA. CSIC, Inst Estructura Mat, E-28006 Madrid, Spain. Univ Warsaw, Inst Theoret Phys, PL-00681 Warsaw, Poland. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. RP Carena, M (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 20 TC 24 Z9 24 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD AUG 27 PY 2001 VL 609 IS 3 BP 499 EP 517 DI 10.1016/S0550-3213(01)00317-0 PG 19 WC Physics, Particles & Fields SC Physics GA 468LF UT WOS:000170758600012 ER PT J AU Afonin, AG Baranov, VT Biryukov, VM Breese, MBH Chepegin, VN Chesnokov, YA Guidi, V Ivanov, YM Kotov, VI Martinelli, G Scandale, W Stefancich, M Terekhov, VI Trbojevic, D Troyanov, EF Vincenzi, D AF Afonin, AG Baranov, VT Biryukov, VM Breese, MBH Chepegin, VN Chesnokov, YA Guidi, V Ivanov, YM Kotov, VI Martinelli, G Scandale, W Stefancich, M Terekhov, VI Trbojevic, D Troyanov, EF Vincenzi, D TI High-efficiency beam extraction and collimation using channeling in very short bent crystals SO PHYSICAL REVIEW LETTERS LA English DT Article ID COMPUTER-SIMULATION; CERN-SPS; PROTONS AB A silicon crystal was used to channel and extract 70 GeV protons from the U-70 accelerator with an efficiency of 85.3 +/-2.8%, as measured for a beam of similar to 10(12) protons directed towards crystals of similar to2 mm length in spills of similar to2 s duration. The experimental data follow very well the prediction of Monte Carlo simulations. This demonstration is important in devising a more efficient use of the U-70 accelerator in Protvino and provides crucial support for implementing crystal-assisted slow extraction and collimation in other machines, such as the Tevatron, RHIC, the AGS, the SNS, COSY, and the LHC. C1 Inst High Energy Phys, Protvino 142281, Russia. Univ Surrey, Guildford GU2 5XH, Surrey, England. Univ Ferrara, Dept Phys, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. INFM, I-44100 Ferrara, Italy. Petersburg Nucl Phys Inst, Gatchina 188350, Russia. CERN, CH-1211 Geneva, Switzerland. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Afonin, AG (reprint author), Inst High Energy Phys, Protvino 142281, Russia. RI Breese, Mark/G-2068-2012; Vincenzi, Donato/J-5064-2012; Biryukov, Valery/C-8432-2017 OI Biryukov, Valery/0000-0002-3591-7762 NR 25 TC 104 Z9 105 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 AUG 27 PY 2001 VL 87 IS 9 BP art. no. EP 094802 DI 10.1103/PhysRevLett.87.094802 PG 4 WC Physics, Multidisciplinary SC Physics GA 467JE UT WOS:000170698000014 PM 11531570 ER PT J AU Berman, GP Brown, GW Hawley, ME Tsifrinovich, VI AF Berman, GP Brown, GW Hawley, ME Tsifrinovich, VI TI Solid-state quantum computer based on scanning tunneling microscopy SO PHYSICAL REVIEW LETTERS LA English DT Article ID SILICON AB We propose a solid-state nuclear-spin quantum computer based on application of scanning tunneling microscopy (STM) and well-developed silicon technology. It requires the measurement of tunneling-current modulation caused by the Larmor precession of a single electron spin. Our envisioned STM quantum computer would operate at the high magnetic field (similar to 10 T) and at low temperature similar to1 K. C1 Los Alamos Natl Lab, CNLS, Los Alamos, NM 87545 USA. Polytech Univ, IDS Dept, Brooklyn, NY 11201 USA. RP Berman, GP (reprint author), Los Alamos Natl Lab, CNLS, T-13, Los Alamos, NM 87545 USA. NR 7 TC 29 Z9 29 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 AUG 27 PY 2001 VL 87 IS 9 BP art. no. EP 097902 DI 10.1103/PhysRevLett.87.097902 PG 3 WC Physics, Multidisciplinary SC Physics GA 467JE UT WOS:000170698000043 ER PT J AU Larochelle, S Mehta, A Kaneko, N Mang, PK Panchula, AF Zhou, L Arthur, J Greven, M AF Larochelle, S Mehta, A Kaneko, N Mang, PK Panchula, AF Zhou, L Arthur, J Greven, M TI Nature of e(g) electron order in La1-xSr1+xMnO4 SO PHYSICAL REVIEW LETTERS LA English DT Article ID X-RAY-SCATTERING; PHASE-SEPARATION; MANGANESE OXIDES; WIGNER-CRYSTAL; BI-STRIPE; CHARGE; LA0.5SR1.5MNO4; LA0.5CA0.5MNO3; LA1-XCAXMNO3; PHYSICS AB X-ray scattering measurements of the low-temperature structure of La1-xSr1+xMnO4 (0.33 less than or equal to x less than or equal to 0.67) indicate the existence of three distinct regions: a disordered phase (x < 0.4), a charge-ordered phase (x 0.5), and a mixed phase (0.4 less than or equal to x < 0.5). For x > 0.5, the modulation vector associated with the charge order is incommensurate with the lattice and depends linearly on the concentration of e(g) electrons. The primary superlattice reflections are strongly suppressed along the modulation direction and the higher harmonics are weak, implying the existence of a largely transverse and nearly sinusoidal structural distortion, consistent with a charge-density wave of the e(g) electrons. C1 Stanford Univ, Dept Phys, Stanford, CA 94305 USA. Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA. Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA. Stanford Univ, TH Geballe Lab Adv Mat, Stanford, CA 94305 USA. RP Larochelle, S (reprint author), Stanford Univ, Dept Phys, Stanford, CA 94305 USA. NR 24 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 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 27 PY 2001 VL 87 IS 9 BP art. no. EP 095502 DI 10.1103/PhysRevLett.87.095502 PG 4 WC Physics, Multidisciplinary SC Physics GA 467JE UT WOS:000170698000017 PM 11531573 ER PT J AU Aubert, B Boutigny, D Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Palano, A Chen, GP Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Reinertsen, PL Stugu, B Abbott, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Clark, AR Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kluth, S Kolomensky, YG Kral, JF LeClerc, C Levi, ME Liu, T Lynch, G Meyer, AB Momayezi, M Oddone, PJ Perazzo, A Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Zisman, MS Bright-Thomas, PG Harrison, TJ Hawkes, CM Knowles, DJ O'Neale, SW Penny, RC Watson, AT Watson, NK Deppermann, T Goetzen, K Koch, H Krug, J Kunze, M Lewandowski, B Peters, K Schmuecker, H Steinke, M Andress, JC Barlow, NR Bhimji, W Chevalier, N Clark, PJ Cottingham, WN De Groot, N Dyce, N Foster, B McFall, JD Wallom, D Wilson, FF Abe, K Hearty, C Mattison, TS McKenna, JA Thiessen, D Jolly, S McKemey, AK Tinslay, J Blinov, VE Bukin, AD Bukin, DA Buzykaev, AR Golubev, VB Ivanchenko, VN Korol, AA Kravchenko, EA Onuchin, AP Salnikov, AA Serednyakov, SI Skovpen, YL Telnov, VI Yushkov, AN Best, D Lankford, AJ Mandelkern, M McMahon, S Stoker, DP Ahsan, A Arisaka, K Buchanan, C Chun, S Branson, JG MacFarlane, DB Prell, S Rahatlou, S Raven, G Sharma, V Campagnari, C Dahmes, B Hart, PA Kuznetsova, N Levy, SL Long, O Lu, A Richman, JD Verkerke, W Witherell, M Yellin, S Beringer, J Dorfan, DE Eisner, AM Frey, A Grillo, AA Grothe, M Heusch, CA Johnson, RP Kroeger, W Lockman, WS Pulliam, T Sadrozinski, H Schalk, T Schmitz, RE Schumm, BA Seiden, A Turri, M Walkowiak, W Williams, DC Wilson, MG Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Metzler, S Oyang, J Porter, FC Ryd, A Samuel, A Weaver, M Yang, S Zhu, RY Devmal, S Geld, TL Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Barillari, T Bloom, P Dima, MO Fahey, S Ford, WT Johnson, DR Nauenberg, U Olivas, A Park, H Rankin, P Roy, J Sen, S Smith, JG van Hoek, WC Wagner, DL Blouw, J Harton, JL Krishnamurthy, M Soffer, A Toki, WH Wilson, RJ Zhang, J Brandt, T Brose, J Colberg, T Dahlinger, G Dickopp, M Dubitzky, RS Hauke, A Maly, E Muller-Pfefferkorn, R Otto, S Schubert, KR Schwierz, R Spaan, B Wilden, L Behr, L Bernard, D Bonneaud, GR Brochard, F Cohen-Tanugi, J Ferrag, S Roussot, E T'Jampens, S Thiebaux, C Vasileiadis, G Verderi, M Anjomshoaa, A Bernet, R Khan, A Lavin, D Muheim, F Playfer, S Swain, JE Falbo, M Borean, C Bozzi, C Dittongo, S Folegani, M Piemontese, L Treadwell, E Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Falciai, D Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Xie, Y Zallo, A Bagnasco, S Buzzo, A Contri, R Crosetti, G Fabbricatore, P Farinon, S Lo Vetere, M Macri, M Monge, MR Musenich, R Pallavicini, M Parodi, R Passaggio, S Pastore, FC Patrignani, C Pia, MG Priano, C Robutti, E Santroni, A Morii, M Bartoldus, R Dignan, T Hamilton, R Mallik, U Cochran, J Crawley, HB Fischer, RA Lamsa, J Meyer, WT Rosenberg, EI Benkebil, M Grosdidier, G Hast, C Hocker, A Lacker, HM Laplace, S Lepeltier, V Lutz, AM Plaszczynski, S Schune, MH Trincaz-Duvoid, S Valassi, A Wormser, G Bionta, RM Brigljevic, V Lange, DJ Mugge, M Shi, X van Bibber, K Wenaus, TJ Wright, DM Wuest, CR Carroll, M Fry, JR Gabathuler, E Gamet, R George, M Kay, M Payne, DJ Sloane, RJ Touramanis, C Aspinwall, ML Bowerman, DA Dauncey, PD Egede, U Eschrich, E Gunawardane, NJW Nash, JA Sanders, P Smith, D Azzopardi, DE Back, JJ Dixon, P Harrison, PF Potter, RJL Shorthouse, HW Strother, P Vidal, PB Williams, MI Cowan, G George, S Green, MG Kurup, A Marker, CE McGrath, P McMahon, TR Ricciardi, S Salvatore, F Scott, I Vaitsas, G Brown, D Davis, CL Allison, J Barlow, RJ Boyd, JT Forti, AC Fullwood, J Jackson, F Lafferty, GD Savvas, N Simopoulos, ET Weatherall, JH Farbin, A Jawahery, A Lillard, V Olsen, J Roberts, DA Schieck, JR Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Moore, TB Staengle, H Willocq, S Brau, B Cowan, R Sciolla, G Taylor, F Yamamoto, RK Milek, M Patel, PM Trischuk, J Lanni, F Palombo, F Bauer, JM Booke, M Cremaldi, L Eschenburg, V Kroeger, R Reidy, J Sanders, DA Summers, DJ Martin, JP Nief, JY Seitz, R Taras, P Zacek, V Nicholson, H Sutton, CS Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C LoSecco, JM Alsmiller, JRG Gabriel, TA Handler, T Brau, J Frey, R Iwasaki, M Sinev, NB Strom, D Colecchia, F Dal Corso, F Dorigo, A Galeazzi, F Margoni, M Michelon, G Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Torassa, E Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O Le Diberder, F Leruste, P Lory, J Roos, L Stark, J Versille, S Manfredi, PF Re, V Speziali, V Frank, ED Gladney, L Guo, QH Panetta, JH Angelini, C Batignani, G Bettarini, S Bondioli, M Carpinelli, M Forti, F Giorgi, MA Lusiani, A Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Simi, G Triggiani, G Walsh, J Haire, M Judd, D Paick, K Turnbull, L Wagoner, DE Albert, J Bula, C Elmer, P Lu, C McDonald, KT Miftakov, V Schaffner, SF Smith, AJS Tumanov, A Varnes, EW Cavoto, G del Re, D Faccini, R Ferrarotto, F Ferroni, F Fratini, K Lamanna, E Leonardi, E Mazzoni, MA Morganti, S Piredda, G Tehrani, FS Serra, M Voena, C Christ, S Waldi, R Adye, T Franek, B Geddes, NI Gopal, GP Xella, SM Aleksan, R De Domenico, G Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M London, GW Mayer, B Serfass, B Vasseur, G Yeche, C Zito, M Copty, N Purohit, MV Singh, H Yumiceva, FX Adam, I Anthony, PL Aston, D Baird, K Berger, JP Bloom, E Boyarski, AM Bulos, F Calderini, G Claus, R Convery, MR Coupal, DP Coward, DH Dorfan, J Doser, M Dunwoodie, W Field, RC Glanzman, T Godfrey, GL Gowdy, SJ Grosso, P Himel, T Hryn'ova, T Huffer, ME Innes, WR Jessop, CP Kelsey, MH Kim, P Kocian, ML Langenegger, U Leith, DWGS Luitz, S Luth, V Lynch, HL Marsiske, H Menke, S Messner, R Moffeit, KC Mount, R Muller, DR O'Grady, CP Perl, M Petrak, S Quinn, H Ratcliff, BN Robertson, SH Rochester, LS Roodman, A Schietinger, T Schindler, RH Schwiening, J Seeman, JT Serbo, VV Snyder, A Soha, A Spanier, SM Stelzer, J Su, D Sullivan, MK Tanaka, HA Va'vra, J Wagner, SR Weinstein, AJR Wienands, U Wisniewski, WJ Wright, DH Young, CC Burchat, PR Cheng, CH Kirkby, D Meyer, TI Roat, C Henderson, R Bugg, W Cohn, H Weidemann, AW Izen, JM Kitayama, I Lou, XC Turcotte, M Bianchi, F Bona, M Di Girolamo, B Gamba, D Smol, A Zanin, D Bosisio, L Della Ricca, G Lanceri, L Pompili, A Poropat, P Vuagnin, G Panvini, RS Brown, CM De Silva, A Kowalewski, R Roney, JM Band, HR Charles, E Dasu, S Di Lodovico, F Eichenbaum, AM Hu, H Johnson, JR Liu, R Nielsen, J Pan, Y Prepost, R Scott, IJ Sekula, SJ von Wimmersperg-Toeller, JH Wu, SL Yu, Z Zobernig, H Kordich, TMB Neal, H AF Aubert, B Boutigny, D Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Palano, A Chen, GP Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Reinertsen, PL Stugu, B Abbott, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Clark, AR Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kluth, S Kolomensky, YG Kral, JF LeClerc, C Levi, ME Liu, T Lynch, G Meyer, AB Momayezi, M Oddone, PJ Perazzo, A Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Zisman, MS Bright-Thomas, PG Harrison, TJ Hawkes, CM Knowles, DJ O'Neale, SW Penny, RC Watson, AT Watson, NK Deppermann, T Goetzen, K Koch, H Krug, J Kunze, M Lewandowski, B Peters, K Schmuecker, H Steinke, M Andress, JC Barlow, NR Bhimji, W Chevalier, N Clark, PJ Cottingham, WN De Groot, N Dyce, N Foster, B McFall, JD Wallom, D Wilson, FF Abe, K Hearty, C Mattison, TS McKenna, JA Thiessen, D Jolly, S McKemey, AK Tinslay, J Blinov, VE Bukin, AD Bukin, DA Buzykaev, AR Golubev, VB Ivanchenko, VN Korol, AA Kravchenko, EA Onuchin, AP Salnikov, AA Serednyakov, SI Skovpen, YL Telnov, VI Yushkov, AN Best, D Lankford, AJ Mandelkern, M McMahon, S Stoker, DP Ahsan, A Arisaka, K Buchanan, C Chun, S Branson, JG MacFarlane, DB Prell, S Rahatlou, S Raven, G Sharma, V Campagnari, C Dahmes, B Hart, PA Kuznetsova, N Levy, SL Long, O Lu, A Richman, JD Verkerke, W Witherell, M Yellin, S Beringer, J Dorfan, DE Eisner, AM Frey, A Grillo, AA Grothe, M Heusch, CA Johnson, RP Kroeger, W Lockman, WS Pulliam, T Sadrozinski, H Schalk, T Schmitz, RE Schumm, BA Seiden, A Turri, M Walkowiak, W Williams, DC Wilson, MG Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Metzler, S Oyang, J Porter, FC Ryd, A Samuel, A Weaver, M Yang, S Zhu, RY Devmal, S Geld, TL Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Barillari, T Bloom, P Dima, MO Fahey, S Ford, WT Johnson, DR Nauenberg, U Olivas, A Park, H Rankin, P Roy, J Sen, S Smith, JG van Hoek, WC Wagner, DL Blouw, J Harton, JL Krishnamurthy, M Soffer, A Toki, WH Wilson, RJ Zhang, J Brandt, T Brose, J Colberg, T Dahlinger, G Dickopp, M Dubitzky, RS Hauke, A Maly, E Muller-Pfefferkorn, R Otto, S Schubert, KR Schwierz, R Spaan, B Wilden, L Behr, L Bernard, D Bonneaud, GR Brochard, F Cohen-Tanugi, J Ferrag, S Roussot, E T'Jampens, S Thiebaux, C Vasileiadis, G Verderi, M Anjomshoaa, A Bernet, R Khan, A Lavin, D Muheim, F Playfer, S Swain, JE Falbo, M Borean, C Bozzi, C Dittongo, S Folegani, M Piemontese, L Treadwell, E Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Falciai, D Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Xie, Y Zallo, A Bagnasco, S Buzzo, A Contri, R Crosetti, G Fabbricatore, P Farinon, S Lo Vetere, M Macri, M Monge, MR Musenich, R Pallavicini, M Parodi, R Passaggio, S Pastore, FC Patrignani, C Pia, MG Priano, C Robutti, E Santroni, A Morii, M Bartoldus, R Dignan, T Hamilton, R Mallik, U Cochran, J Crawley, HB Fischer, RA Lamsa, J Meyer, WT Rosenberg, EI Benkebil, M Grosdidier, G Hast, C Hocker, A Lacker, HM Laplace, S Lepeltier, V Lutz, AM Plaszczynski, S Schune, MH Trincaz-Duvoid, S Valassi, A Wormser, G Bionta, RM Brigljevic, V Lange, DJ Mugge, M Shi, X van Bibber, K Wenaus, TJ Wright, DM Wuest, CR Carroll, M Fry, JR Gabathuler, E Gamet, R George, M Kay, M Payne, DJ Sloane, RJ Touramanis, C Aspinwall, ML Bowerman, DA Dauncey, PD Egede, U Eschrich, E Gunawardane, NJW Nash, JA Sanders, P Smith, D Azzopardi, DE Back, JJ Dixon, P Harrison, PF Potter, RJL Shorthouse, HW Strother, P Vidal, PB Williams, MI Cowan, G George, S Green, MG Kurup, A Marker, CE McGrath, P McMahon, TR Ricciardi, S Salvatore, F Scott, I Vaitsas, G Brown, D Davis, CL Allison, J Barlow, RJ Boyd, JT Forti, AC Fullwood, J Jackson, F Lafferty, GD Savvas, N Simopoulos, ET Weatherall, JH Farbin, A Jawahery, A Lillard, V Olsen, J Roberts, DA Schieck, JR Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Moore, TB Staengle, H Willocq, S Brau, B Cowan, R Sciolla, G Taylor, F Yamamoto, RK Milek, M Patel, PM Trischuk, J Lanni, F Palombo, F Bauer, JM Booke, M Cremaldi, L Eschenburg, V Kroeger, R Reidy, J Sanders, DA Summers, DJ Martin, JP Nief, JY Seitz, R Taras, P Zacek, V Nicholson, H Sutton, CS Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C LoSecco, JM Alsmiller, JRG Gabriel, TA Handler, T Brau, J Frey, R Iwasaki, M Sinev, NB Strom, D Colecchia, F Dal Corso, F Dorigo, A Galeazzi, F Margoni, M Michelon, G Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Torassa, E Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O Le Diberder, F Leruste, P Lory, J Roos, L Stark, J Versille, S Manfredi, PF Re, V Speziali, V Frank, ED Gladney, L Guo, QH Panetta, JH Angelini, C Batignani, G Bettarini, S Bondioli, M Carpinelli, M Forti, F Giorgi, MA Lusiani, A Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Simi, G Triggiani, G Walsh, J Haire, M Judd, D Paick, K Turnbull, L Wagoner, DE Albert, J Bula, C Elmer, P Lu, C McDonald, KT Miftakov, V Schaffner, SF Smith, AJS Tumanov, A Varnes, EW Cavoto, G del Re, D Faccini, R Ferrarotto, F Ferroni, F Fratini, K Lamanna, E Leonardi, E Mazzoni, MA Morganti, S Piredda, G Tehrani, FS Serra, M Voena, C Christ, S Waldi, R Adye, T Franek, B Geddes, NI Gopal, GP Xella, SM Aleksan, R De Domenico, G Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M London, GW Mayer, B Serfass, B Vasseur, G Yeche, C Zito, M Copty, N Purohit, MV Singh, H Yumiceva, FX Adam, I Anthony, PL Aston, D Baird, K Berger, JP Bloom, E Boyarski, AM Bulos, F Calderini, G Claus, R Convery, MR Coupal, DP Coward, DH Dorfan, J Doser, M Dunwoodie, W Field, RC Glanzman, T Godfrey, GL Gowdy, SJ Grosso, P Himel, T Hryn'ova, T Huffer, ME Innes, WR Jessop, CP Kelsey, MH Kim, P Kocian, ML Langenegger, U Leith, DWGS Luitz, S Luth, V Lynch, HL Marsiske, H Menke, S Messner, R Moffeit, KC Mount, R Muller, DR O'Grady, CP Perl, M Petrak, S Quinn, H Ratcliff, BN Robertson, SH Rochester, LS Roodman, A Schietinger, T Schindler, RH Schwiening, J Seeman, JT Serbo, VV Snyder, A Soha, A Spanier, SM Stelzer, J Su, D Sullivan, MK Tanaka, HA Va'vra, J Wagner, SR Weinstein, AJR Wienands, U Wisniewski, WJ Wright, DH Young, CC Burchat, PR Cheng, CH Kirkby, D Meyer, TI Roat, C Henderson, R Bugg, W Cohn, H Weidemann, AW Izen, JM Kitayama, I Lou, XC Turcotte, M Bianchi, F Bona, M Di Girolamo, B Gamba, D Smol, A Zanin, D Bosisio, L Della Ricca, G Lanceri, L Pompili, A Poropat, P Vuagnin, G Panvini, RS Brown, CM De Silva, A Kowalewski, R Roney, JM Band, HR Charles, E Dasu, S Di Lodovico, F Eichenbaum, AM Hu, H Johnson, JR Liu, R Nielsen, J Pan, Y Prepost, R Scott, IJ Sekula, SJ von Wimmersperg-Toeller, JH Wu, SL Yu, Z Zobernig, H Kordich, TMB Neal, H CA BABAR Collaboration TI Observation of CP violation in the B-0 meson system SO PHYSICAL REVIEW LETTERS LA English DT Article ID DECAYS AB We present an updated measurement of time-dependent CP-violating asymmetries in neutral B decays with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. This result uses an additional sample of Y(4S) decays collected in 2001, bringing the data available to 32 x 10(6) B (B) over bar pairs. We select events in which one neutral B meson is fully reconstructed in a final state containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the standard model is proportional to sin2 beta, is derived from the decay time distributions in such events. The result sin2 beta = 0.59 +/-0.14(stat) +/-0.05(syst) establishes CP violation in the B-0 meson system. We also determine \ gimel \ = 0.93 +/-0.09(stat) +/-0.03(syst), consistent with no direct CP violation. C1 Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. Univ Bari, Dipartmento Fis, I-70126 Bari, Italy. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Bergen, Inst Phys, N-5007 Bergen, Norway. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany. Univ Bristol, Bristol BS8 1TL, Avon, England. Univ British Columbia, Vancouver, BC V6T 1Z1, Canada. Brunel Univ, Uxbridge UB8 3PH, Middx, England. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif 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. Colorado State Univ, Ft Collins, CO 80523 USA. Univ Colorado, Boulder, CO 80309 USA. Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany. Ecole Polytech, F-91128 Palaiseau, France. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Elon Univ, Elon, NC 27244 USA. Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Florida A&M Univ, Tallahassee, FL 32307 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Ist Nazl Fis Nucl, I-16146 Genoa, Italy. Harvard Univ, Cambridge, MA 02138 USA. Univ 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 3BX, Merseyside, England. Univ London, Imperial Coll, London SW7 2BW, 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 2, Dipartimento Sci Fis, I-80126 Naples, Italy. Ist Nazl Fis Nucl, I-80126 Naples, Italy. Univ Notre Dame, Notre Dame, IN 46556 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 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 HE, F-75252 Paris, France. Univ Paris 07, Lab Phys Nucl HE, F-75252 Paris, France. Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy. Ist Nazl Fis Nucl, I-27100 Pavia, Italy. Univ Penn, Philadelphia, PA 19104 USA. Univ Pisa, Scuola Normale Super Pisa, I-56010 Pisa, Italy. Ist Nazl Fis Nucl, I-56010 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, 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. TRIUMF, Vancouver, BC V6T 2A3, Canada. Univ Tennessee, Knoxville, TN 37996 USA. Univ Texas, Richardson, TX 75083 USA. Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy. Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Univ Perugia, I-06100 Perugia, Italy. Univ Basilicata, I-85100 Potenza, Italy. RP Aubert, B (reprint author), Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. RI 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; Telnov, Valery/C-6900-2009; Cavallo, Nicola/F-8913-2012; Patrignani, Claudia/C-5223-2009; Monge, Maria Roberta/G-9127-2012; Kravchenko, Evgeniy/F-5457-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Lamanna, Ernesto/C-7658-2012; Pallavicini, Marco/G-5500-2012; Lusiani, Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Valassi, Andrea/K-7506-2012; Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; Levy, Stephen/C-3493-2011; Schaffner, Stephen/D-1189-2011; Roe, Natalie/A-8798-2012; Frank, Edward/A-8865-2012; Pia, Maria Grazia/C-7034-2012; Torassa, Ezio/I-1788-2012; Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; de Sangro, Riccardo/J-2901-2012 OI 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; Telnov, Valery/0000-0002-8312-8119; Patrignani, Claudia/0000-0002-5882-1747; Monge, Maria Roberta/0000-0003-1633-3195; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Lamanna, Ernesto/0000-0002-7844-8230; Pallavicini, Marco/0000-0001-7309-3023; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Valassi, Andrea/0000-0001-9322-9565; Peters, Klaus/0000-0001-7133-0662; Pia, Maria Grazia/0000-0002-3579-9639; Forti, Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163; de Sangro, Riccardo/0000-0002-3808-5455 NR 17 TC 439 Z9 442 U1 2 U2 24 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 AUG 27 PY 2001 VL 87 IS 9 AR 091801 DI 10.1103/PhysRevLett.87.091801 PG 8 WC Physics, Multidisciplinary SC Physics GA 467JE UT WOS:000170698000004 PM 11580690 ER PT J AU Hill, ME Adolphsen, C Baumgartner, W Callin, RS Lin, XTE Seidel, M Slaton, T Whittum, DH AF Hill, ME Adolphsen, C Baumgartner, W Callin, RS Lin, XTE Seidel, M Slaton, T Whittum, DH TI High-gradient millimeter-wave accelerator on a planar dielectric substrate SO PHYSICAL REVIEW LETTERS LA English DT Article AB We report the first high-gradient studies of a millimeter-wave accelerator, employing for the first time a planar dielectric accelerator, powered by means of a 0.5-A, 300-MeV, 11.424-GHz drive electron beam, synchronous at the 8th harmonic, 91.392 GHz. Embedded in a ring-resonator circuit within the electron beam line vacuum, this structure was operated at 20 MeV/m, with a circulating power of 200 kW, for 2 x 10(5) pulses, with no sign of break-down, dielectric charging, or other deleterious high-gradient phenomena. We also present the first measurement of the quadrupolar content of an accelerating mode. C1 Harvard Univ, Dept Phys, Cambridge, MA 02138 USA. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Harvard Univ, Dept Phys, Cambridge, MA 02138 USA. EM marc@physics.harvard.edu NR 16 TC 21 Z9 21 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 27 PY 2001 VL 87 IS 9 AR 094801 DI 10.1103/PhysRevLett.87.094801 PG 4 WC Physics, Multidisciplinary SC Physics GA 467JE UT WOS:000170698000013 PM 11531569 ER PT J AU Nieto, MM Truax, DR AF Nieto, MM Truax, DR TI The Schrodinger system H =-1/2e(Y(t-to))rho(xx)+1/2 omega(2)e-(Y(t-to))x(2) SO ANNALS OF PHYSICS LA English DT Article ID ISOMORPHIC SYMMETRY ALGEBRAS; OPERATOR SQUEEZED STATES; TIME-DEPENDENT SYSTEMS; HARMONIC-OSCILLATOR; EQUATIONS; EVOLUTION; MASS AB In this paper, we attack the specific time-dependent Hamiltonian problem H = -1/2e(gamma (1-t0))partial derivative (xx) + 1/2 omega (2)e(-gamma (1-t0))x(2). This corresponds to a time dependent mass (TM) Schrodinger equation. We give the specific transformations to (i) the more general quadratic (TQ) Schrodinger equation and to (ii) a different time-dependent oscillator (TO) equation. For each Schrodinger system, we give the Lie algebra of space-time symmetries, the number states, the coherent states, the squeezed-states, and the time-dependent (x), (p), (Deltax)(2,) (Deltap)(2), and uncertainty product. (C) 2001 Academic Press. C1 Los Alamos Natl Lab, Theoret Div MS B285, Los Alamos, NM 87545 USA. Univ Calgary, Dept Chem, Calgary, AB T2N 1N4, Canada. RP Nieto, MM (reprint author), Los Alamos Natl Lab, Theoret Div MS B285, POB 1663, Los Alamos, NM 87545 USA. NR 30 TC 1 Z9 1 U1 1 U2 1 PU ACADEMIC PRESS INC PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0003-4916 J9 ANN PHYS-NEW YORK JI Ann. Phys. PD AUG 25 PY 2001 VL 292 IS 1 BP 1 EP 22 DI 10.1006/aphy.2001.6144 PG 22 WC Physics, Multidisciplinary SC Physics GA 471JY UT WOS:000170927300001 ER PT J AU Nieto, MM Truax, DR AF Nieto, MM Truax, DR TI The Schrodinger system H =-1/2(to/t)(a)delta(xx)+1/2 omega(2)(t/to)(b)x(2) SO ANNALS OF PHYSICS LA English DT Article ID ISOMORPHIC SYMMETRY ALGEBRAS; EQUATIONS AB We attack the specific time-dependent Hamiltonian problem H = -(1/2)(t(o)/t)(u)partial derivative (xx) + (1/2)omega (2) (t/t(o))(b)x(2). This corresponds to a time-dependent mass (TV) Schrodinger equation. We give the specific transformations to a different time-dependent quadratic Schrodinger equation (TQ) and to a different time-dependent oscillator (TO) equation. For each Schrodinger system, we give the Lie algebra of space-time symmetries, the number states, the squeezed-state and

(with their classical motion). (Deltax)(2), (Deltap)(2), and the uncertainty product. (C) 2001 Academic Press. C1 Los Alamos Natl Lab, Theoret Div MS B285, Los Alamos, NM 87545 USA. Univ Calgary, Dept Chem, Calgary, AB T2N 1N4, Canada. RP Nieto, MM (reprint author), Los Alamos Natl Lab, Theoret Div MS B285, POB 1663, Los Alamos, NM 87545 USA. NR 7 TC 3 Z9 3 U1 1 U2 1 PU ACADEMIC PRESS INC PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0003-4916 J9 ANN PHYS-NEW YORK JI Ann. Phys. PD AUG 25 PY 2001 VL 292 IS 1 BP 23 EP 41 DI 10.1006/aphy.2001.6145 PG 19 WC Physics, Multidisciplinary SC Physics GA 471JY UT WOS:000170927300002 ER PT J AU Horan, B Gardner, EL Dewey, SL Brodie, JD Ashby, CR AF Horan, B Gardner, EL Dewey, SL Brodie, JD Ashby, CR TI The selective sigma(1) receptor agonist, 1-(3,4-dimethoxyphenethyl)-4-(phenylpropyl) piperazine (SA4503), blocks the acquisition of the conditioned place preference response to (-)-nicotine in rats SO EUROPEAN JOURNAL OF PHARMACOLOGY LA English DT Article DE conditioned place preference; nicotine; sigma receptor AB We examined the effect of the sigma (1) receptor agonist, 1-(3,4-dimethoxyphenethyl)-4-(phenylpropyl)piperazine (SA4503), on the acquisition of the conditioned place preference response to subcutaneously administered (-)-nicotine in rats. (-)-Nicotine, but not SA4503 or vehicle, produced a significant conditioned place preference response. Pretreatment of animals with either 1 or 3 mg/kg of SA4503 significantly attenuated the conditioned place preference response to)-nicotine. (C) 2001 Published by Elsevier Science B.V. C1 St Johns Univ, Coll Pharm & Allied Hlth Profess, Pharmaceut Hlth Sci Dept, Jamaica, NY 11439 USA. NYU, Sch Med, Dept Psychiat, New York, NY 10016 USA. NIDA, Intramural Res Program, NIH, Baltimore, MD 21224 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP Ashby, CR (reprint author), St Johns Univ, Coll Pharm & Allied Hlth Profess, Pharmaceut Hlth Sci Dept, 8000 Utopia Pkwy, Jamaica, NY 11439 USA. NR 8 TC 16 Z9 17 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0014-2999 J9 EUR J PHARMACOL JI Eur. J. Pharmacol. PD AUG 24 PY 2001 VL 426 IS 1-2 BP R1 EP R2 DI 10.1016/S0014-2999(01)01229-8 PG 2 WC Pharmacology & Pharmacy SC Pharmacology & Pharmacy GA 470NX UT WOS:000170879000020 PM 11525784 ER PT J AU Greenberg, RB Alberti, M Hearst, JE Chua, MA Saffran, WA AF Greenberg, RB Alberti, M Hearst, JE Chua, MA Saffran, WA TI Recombinational and mutagenic repair of psoralen interstrand cross-links in Saccharomyces cerevisiae SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID NUCLEOTIDE EXCISION-REPAIR; MAMMALIAN-CELL EXTRACTS; GENE CONVERSION TRACTS; DOUBLE-STRAND BREAKS; ESCHERICHIA-COLI; DNA-POLYMERASE; RECIPROCAL RECOMBINATION; 8-METHOXYPSORALEN PLUS; PLASMID RECOMBINATION; THYMINE DIMER AB Psoralen photoreacts with DNA to form interstrand cross-links, which can be repaired by both nonmutagenic nucleotide excision repair and recombinational repair pathways and by mutagenic pathways. In the yeast Saccharomyces cerevisiae, psoralen cross-links are processed by nucleotide excision repair to form double-strand breaks (DSBs). In yeast, DSBs are repaired primarily by homologous recombination, predicting that cross-link and DSB repair should induce similar recombination end points. We compared psoralen cross-link, psoralen monoadduct, and DSB repair using plasmid substrates with site-specific lesions and measured the patterns of gene conversion, crossing over, and targeted mutation. Psoralen cross-link induced both recombination and mutations, whereas DSBs induced only recombination, and monoadducts were neither recombinogenic nor mutagenic. Although the cross-link- and DSB-induced patterns of plasmid integration and gene conversion were similar in most respects, they showed opposite asymmetries in their unidirectional conversion tracts: primarily upstream from the damage site for cross-links but downstream for DSBs. Cross-links induced targeted mutations in 5% of the repaired plasmids; all were base substitutions, primarily T --> C transitions. The major pathway of psoralen cross-link repair in yeast is error-free and involves the formation of DSB intermediates followed by homologous recombination. A fraction of the cross-links enter an error-prone pathway, resulting in mutations at the damage site. C1 CUNY Queens Coll, Dept Chem & Biochem, Flushing, NY 11367 USA. Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Dept Chem, Berkeley, CA 94720 USA. RP CUNY Queens Coll, Dept Chem & Biochem, 65-30 Kissena Blvd, Flushing, NY 11367 USA. EM Wilma_Saffran@qc.edu FU NCI NIH HHS [CA42377]; NIGMS NIH HHS [GM47945] NR 57 TC 26 Z9 26 U1 1 U2 1 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA SN 0021-9258 EI 1083-351X J9 J BIOL CHEM JI J. Biol. Chem. PD AUG 24 PY 2001 VL 276 IS 34 BP 31551 EP 31560 DI 10.1074/jbc.M103588200 PG 10 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 465WT UT WOS:000170613500013 PM 11390398 ER PT J AU Chen, YB Kele, M Quinones, I Sellergren, B Guiochon, G AF Chen, YB Kele, M Quinones, I Sellergren, B Guiochon, G TI Influence of the pH on the behavior of an imprinted polymeric stationary phase - supporting evidence for a binding site model SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article DE pH effects; imprinted polymeric stationary phase; stationary phases; Lc; enantiomer separation; adsorption isotherms; molecular imprinting; binding site model; phenylalanine anilide ID NONCOVALENT INTERACTIONS; CHIRAL SEPARATION; SOLUTE RETENTION; RECOGNITION; CHROMATOGRAPHY; ENANTIOMERS; TEMPERATURE; MIXTURES; W/W AB The equilibrium isotherms of the two enantiomers of phenylalanine anilide (PA) were measured by conventional frontal analysis at three different pH on a thermally-treated imprinted stationary phase selective for the L enantiomer. The first of these pH (buffer pH=3.0, pH(app)=4.0) is well below the apparent pK(a) (6.4) of the two solutes, the second (buffer pH=5.8, pH(app)=7.0) slightly below this pK(a), and the third (buffer pH=7.0, pH(app)=8.3) well above it. The experimental data were fitted to several isotherm models. The best estimates of the parameters of these models are reported and discussed. The corresponding isotherms are compared with the experimental ones. The contributions of the enantioselective and nonselective interactions could be separated. The results obtained show that the saturation capacity is always smaller for D-PA than for L-PA, the template. The analytical separation is best at pH=3.0 because of a good separation factor (2.82) and short retention times. A good compromise between the resolution and the saturation capacity is obtained at pH=5.8, for which the best preparative separation is found. Both analytical and preparative results are poor at pH=7.0 because the separation factor is low (1.32). At this pH, the isotherm remains nearly linear in the whole concentration range accessible to measurements. The number of nonselective sites increases with increasing mobile phase pH slightly faster than the number of selective sites, suggesting different pK(a) ranges for the two type of sites. Moreover, the binding energy and the homogeneity of the selective sites decreases with increasing pH. These results agree with a binding site model involving more than one carboxylic acid group, providing charge complementarity and hydrogen bond donors for binding Of L-PA. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem & Analyt Sci, Oak Ridge, TN 37831 USA. Univ Mainz, Dept Inorgan Chem & Analyt Chem, D-55099 Mainz, Germany. RP Guiochon, G (reprint author), Univ Tennessee, Dept Chem, 552 Buchler Hall, Knoxville, TN 37996 USA. NR 24 TC 62 Z9 63 U1 1 U2 12 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR A JI J. Chromatogr. A PD AUG 24 PY 2001 VL 927 IS 1-2 BP 1 EP 17 DI 10.1016/S0021-9673(01)01019-6 PG 17 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA 484YJ UT WOS:000171716900001 PM 11572378 ER PT J AU Clark, AJ Inwood, W Cloutier, T Dhillon, TS AF Clark, AJ Inwood, W Cloutier, T Dhillon, TS TI Nucleotide sequence of coliphage HK620 and the evolution of lambdoid phages SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE lambdoid bacteriophages; bacteriophage diversity; bacteriophage genomes; integrase phylogeny; bacteriophage evolution ID ESCHERICHIA-COLI K-12; SHIGELLA-FLEXNERI BACTERIOPHAGE-SF6; SRL RECA-REGION; SALMONELLA PHAGE-P22; SECONDARY ENDOSYMBIONT; TAILSPIKE PROTEIN; DNA-SEQUENCES; N-PROTEIN; RECOMBINATION; HK022 AB HK620 is a temperate lambdoid bacteriophage that adsorbs to the O-antigen of its host, Escherichia coli H. The genome of a temperature-sensitive clear-plaque mutant consists of 38,297 nucleotides in which we recognize 60 open reading frames (orfs). Eighteen of these lie in a region of the genome that we call the virion structure domain. The other 42 orfs lie in what we call the metabolic domain. Virions of HK620 resemble those of phage P22. The virion structural orfs encode three kinds of putative proteins relative to the virion proteins of P22: (1) those that are nearly (about 90%) identical; (2) those that are weakly (about 30%) identical; and (3) those composed of nearly and weakly identical segments. We hypothesize that these composite proteins form bridges between the virion proteins of the other two kinds. Three of the putative virion proteins that are only weakly identical to P22 proteins are 71, 60 and 79% identical to proteins encoded by the phage APSE-1, whose virions also resemble those of P22. Because the hosts of APSE-1 and HK620 have been separated from each other by an estimated 200 My, we propose using the amino acid differences that have accumulated in these proteins to estimate a biological clock for temperate lambdoid phages. The putative transcriptional regulatory gene circuitry of HK620 seems to resemble that of phage lambda. Integration, on the other hand, resembles that of satellite phage P4 in that the attP sequence lies between the leftward promoter and int rather than downstream of int. Comparing the metabolic domains of several lambdoid phage genomes reveals seven short conserved sequences roughly defining boundaries of functional modules. We propose that these boundary sequences are foci of genetic recombination that serve to assort the modules and make the metabolic domain highly mosaic genetically. (C) 2001 Academic Press. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Mol & Cell Biol, Div Life Sci, Berkeley, CA 94720 USA. RP Clark, AJ (reprint author), Univ Arizona, Dept Mol & Cellular Biol, POB 210106, Tucson, AZ 85721 USA. FU NIAID NIH HHS [AI05371] NR 57 TC 82 Z9 89 U1 0 U2 7 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD AUG 24 PY 2001 VL 311 IS 4 BP 657 EP 679 DI 10.1006/jmbi.2001.4868 PG 23 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 466RR UT WOS:000170659500003 PM 11518522 ER PT J AU Canady, MA Tsuruta, H Johnson, JE AF Canady, MA Tsuruta, H Johnson, JE TI Analysis of rapid, large-scale protein quaternary structural changes: Time-resolved X-ray solution scattering of Nudaurelia capensis omega virus (N omega V) maturation SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE tetravirus; cooperativity; virus maturation; conformational change ID CONFORMATIONAL-CHANGES; CAPSID MATURATION; RNA; TRANSFORMATIONS; CRYSTALLOGRAPHY; PROCAPSIDS; RESOLUTION; PROGRAM; SYSTEM; FORMS AB Time-resolved small-angle X-ray scattering (TR-SAXS) was used to study the kinetics of a large conformational change that occurs during the maturation of an icosahedral virus. Virus-like particles (VLPs) of the T = 4 non-enveloped RNA virus Nudaurelia capensis omega virus (N omegaV) were shown to undergo a large pH-dependent conformational change. Electron cryo-microscopy (cryoEM) and X-ray solution scattering were used to show that the precursor VLP (procapsid) was 16% larger in diameter, than the resulting capsid, which was shown by the cryoEM study to, closely resemble the infectious mature virion. The procapsid. form of the VLPs was observed at pH 7.5 and was converted to the capsid form at pH 5.0. Static SAXS measurements of the VLPs in solutions ranging between these pH values determined that the half-titration point of the transition was pH 6.0. Time-resolved SAXS experiments were performed on VLP solutions by initiating a pH change from 7.5 to 5.0 using a stopped-flow device, and the time-scale of the conformational change occurred in the subsecond range. Using a less drastic pH change (lowering the pH to 5.8 or 5.5), the conformational change occurred more slowly, on the subminute or minute time-scale, with the detection of a fast-forming intermediate in the transition. Further characterization using static SAXS measurements showed that the conformational change was initially reversible but became irreversible after autoproteolytic maturation was about 15% complete. In addition to characterizing the large quaternary conformational change, we have been able for the first time to demonstrate that it takes place on the subsecond time-scale, a regime comparable to that observed in other multisubunit assemblies. (C) 2001 Academic Press. C1 Scripps Res Inst, Dept Mol Biol, La Jolla, CA 92037 USA. Stanford Univ, SLAC, SSRL, Menlo Pk, CA 94025 USA. RP Johnson, JE (reprint author), Scripps Res Inst, Dept Mol Biol, La Jolla, CA 92037 USA. FU NIGMS NIH HHS [GM54076] NR 32 TC 58 Z9 58 U1 0 U2 7 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD AUG 24 PY 2001 VL 311 IS 4 BP 803 EP 814 DI 10.1006/jmbi.2001.4896 PG 12 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 466RR UT WOS:000170659500013 PM 11518532 ER PT J AU Richards, MA Yang, WS Baumgardner, JR Bunge, HP AF Richards, MA Yang, WS Baumgardner, JR Bunge, HP TI Role of a low-viscosity zone in stabilizing plate tectonics: Implications for comparative terrestrial planetology SO GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS LA English DT Article DE plate tectonics; mantle convection; mantle viscosity; rheology; Venus; lithosphere; dynamics of lithosphere and mantle, general; planetary tectonics; plate motions, general; rheology, mantle ID TEMPERATURE-DEPENDENT VISCOSITY; NON-NEWTONIAN RHEOLOGY; MANTLE CONVECTION; THERMAL-CONVECTION; VENUS; MODELS; FLOW; LITHOSPHERE; SURFACE; STRESS AB [1] Earth's near-surface layer, its lithosphere, is broken into quasi-rigid plates that form the upper thermal boundary layer for mantle convection. Since the discovery of plate tectonics, it has been widely conjectured but only recently demonstrated that this peculiar style of convection may be facilitated by an upper mantle low viscosity zone (LVZ) over which the plates glide easily. The LVZ, or "asthenosphere," concept dates from 19th century investigations of isostatic support of mountain belts and is supported by modern evidence for a seismic low velocity zone and by studies of postglacial rebound and dynamic compensation of the Earth's gravity field. Here we show in both two-dimensional (2-D) Cartesian and 3-D spherical Earth models that combining a pronounced LVZ and a plastic yield stress to allow localized weakening of the cold thermal boundary layer results in a distinctly plate tectonic style of convection, with similar to 30% toroidal surface motion for the 3-D case. Recycling of water into the upper mantle at subduction zones is a plausible cause of Earth's LVZ, whereas Venus is dry and lacks both an LVZ and plate tectonics. C1 Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. Los Alamos Natl Lab, Inst Geophys & Planetary Phys, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Princeton Univ, Dept Geosci, Princeton, NJ 08540 USA. RP Richards, MA (reprint author), Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. NR 47 TC 97 Z9 97 U1 2 U2 9 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 1525-2027 J9 GEOCHEM GEOPHY GEOSY JI Geochem. Geophys. Geosyst. PD AUG 23 PY 2001 VL 2 AR 2000GC000115 PG 16 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 465UZ UT WOS:000170609500001 ER PT J AU Vaknin, D Miller, LL Eshel, M Bino, A AF Vaknin, D Miller, LL Eshel, M Bino, A TI Magnetic molecules at the air/water interface SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID C-60-PROPYLAMINE ADDUCT MONOLAYERS AB X-ray Reflectivity (XR) and grazing angles of incidence X-ray diffraction (GIXD) were conducted to determine the structure of Cr8O4(O2CPh)(16) Langmuir films at the air/water interface at various surface pressures pi. The molecular area versus pressure, pi -A isotherm, reflectivity, and GIXD variation (width and peak position) with compression, all imply the formation of a homogeneous monolayer at very low surface pressures. The film is disordered with a liquidlike or glassy structure factor at all pressures, with correlation lengths that extend over a few molecular distances. The liquidlike state of the monolayer and an incomplete formation of a second layer have implications on the quality of transferred Langmuir-Blodgett films. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. Hebrew Univ Jerusalem, Dept Inorgan & Analyt Chem, IL-91904 Jerusalem, Israel. RP Vaknin, D (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. RI Vaknin, David/B-3302-2009 OI Vaknin, David/0000-0002-0899-9248 NR 10 TC 4 Z9 4 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1089-5647 J9 J PHYS CHEM B JI J. Phys. Chem. B PD AUG 23 PY 2001 VL 105 IS 33 BP 8014 EP 8017 DI 10.1021/jp011100+ PG 4 WC Chemistry, Physical SC Chemistry GA 463ZH UT WOS:000170506800022 ER PT J AU Key, MH AF Key, MH TI Fast track to fusion energy SO NATURE LA English DT Editorial Material ID IGNITION; LASERS; GAIN C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Key, MH (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. NR 7 TC 59 Z9 61 U1 1 U2 11 PU MACMILLAN PUBLISHERS LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD AUG 23 PY 2001 VL 412 IS 6849 BP 775 EP 776 DI 10.1038/35090666 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 465ET UT WOS:000170577200020 PM 11518946 ER PT J AU McElhanon, JR Wheeler, DR AF McElhanon, JR Wheeler, DR TI Thermally responsive dendrons and dendrimers based on reversible furan-maleimide Diels-Alder adducts SO ORGANIC LETTERS LA English DT Article ID MOLECULAR RECOGNITION; POLYPHENYLENE DENDRIMERS; MACROMOLECULES; POLYMERS; COPOLYMERS; CHEMISTRY; MOIETIES; RESINS AB [GRAPHICS] Benzyl aryl ether dendrons and dendrimers containing thermally reversible furan-malelmide Diels-Alder adducts were prepared up to the third generation. The covalent cleavage and reassembly of the dendrons and dendrimers were evaluated by H-1 NMR. C1 Sandia Natl Labs, Organ Mat Dept, Albuquerque, NM 87185 USA. RP McElhanon, JR (reprint author), Sandia Natl Labs, Organ Mat Dept, POB 5800, Albuquerque, NM 87185 USA. NR 37 TC 102 Z9 104 U1 6 U2 29 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1523-7060 J9 ORG LETT JI Org. Lett. PD AUG 23 PY 2001 VL 3 IS 17 BP 2681 EP 2683 DI 10.1021/ol0101281 PG 3 WC Chemistry, Organic SC Chemistry GA 465PZ UT WOS:000170600300016 PM 11506608 ER PT J AU Bender, M Nazarewicz, W Reinhard, PG AF Bender, M Nazarewicz, W Reinhard, PG TI Shell stabilization of super- and hyperheavy nuclei without magic gaps SO PHYSICS LETTERS B LA English DT Article ID CA-48+PU-244 REACTION; ELEMENTS; PARAMETRIZATION; DISCOVERY; STABILITY; DECAY AB Quantum stabilization of superheavy elements is quantified in terms of the shell-correction energy. We compute the shell correction at spherical shape using self-consistent nuclear models: the non-relativistic Skyrme-Hartree-Fock approach and the relativistic mean-field model, for a number of parametrizations. All the forces applied predict a broad valley of shell stabilization around Z = 120 and N = 172-184. We also predict two broad regions of shell stabilization in hyperheavy elements with N approximate to 258 and N approximate to 308. Due to the large single-particle level density, shell corrections in the superheavy elements differ markedly from those in lighter nuclei. With increasing proton and neutron numbers, the regions of nuclei stabilized by shell effects become poorly localized in particle number, and the familiar pattern of shells separated by magic gaps is basically gone. (C) 2001 Published by Elsevier Science B.V. C1 Gesell Schwerionenforsch, D-64291 Darmstadt, Germany. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Warsaw, Inst Theoret Phys, PL-00681 Warsaw, Poland. Univ Erlangen Nurnberg, Inst Theoret Phys 2, D-91058 Erlangen, Germany. Oak Ridge Natl Lab, Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA. RP Bender, M (reprint author), Gesell Schwerionenforsch, Planckstr 1, D-64291 Darmstadt, Germany. RI Bender, Michael/B-9004-2009 NR 36 TC 128 Z9 133 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 23 PY 2001 VL 515 IS 1-2 BP 42 EP 48 DI 10.1016/S0370-2693(01)00863-2 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 466DA UT WOS:000170628000007 ER PT J AU Lipkin, HJ AF Lipkin, HJ TI Systematics of large axial vector meson production in heavy flavor weak decays SO PHYSICS LETTERS B LA English DT Article AB Branching ratios observed for D and B decays to final states a(1)(1260)X+/- are comparable to those for corresponding decays to pi X+/- and rho X+/- and much larger than those for all other decays. Implications are discussed of a "vector-dominance model" in which a W is produced and immediately turns into an axial vector, vector or pseudoscalar meson. Data for decays to all such final states are shown to have large branching ratios and satisfy universality relations. Upper limits on small strong phase differences between amplitudes relevant to CP violation models are obtained from analysis of the predicted and observed suppression of B-0 decays into neutral final states pi X-0(0), rho X-0(0) and a(1)(0)X(0). Branching ratios of approximate to 1% are predicted for the as yet unobserved presence of the D-s1 (2536) charmed-strange axial vector in B decays. (C) 2001 Published by Elsevier Science B.V. C1 Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel. Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys & Astron, IL-69978 Tel Aviv, Israel. Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA. RP Lipkin, HJ (reprint author), Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel. NR 12 TC 14 Z9 14 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 23 PY 2001 VL 515 IS 1-2 BP 81 EP 88 DI 10.1016/S0370-2693(01)00747-X PG 8 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 466DA UT WOS:000170628000012 ER PT J AU Tsouris, C Blankenship, KD Dong, JH DePaoli, DW AF Tsouris, C Blankenship, KD Dong, JH DePaoli, DW TI Enhancement of distillation efficiency by application of an electric field SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Article ID ELECTROSTATIC DISPERSION; FLUIDS AB The effects of an applied electric field on distillation were investigated using a laboratory-scale two-stage column. The electric field was applied in the liquid region between a distillation plate and a rod-shaped electrode immersed in the liquid and placed parallel to the plate. It was found that the distillation column performance, i.e., the plate efficiency and distillate flow rate, can be increased by application of a direct-current (DC) electric field to the liquid phase of the plate. The cause for such an increase in the distillation efficiency appears to be the enhancement in mass- and heat-transfer rates under the applied electric field. For a binary system of water and 2-propanol, a 2.2% increase in the plate efficiency of the second stage and a 4-fold increase in the distillate flow rate were obtained by application of a voltage of 14 kV. A 20% increase in the heat energy input was observed under this voltage. These enhancements were not observed in the distillation of a nonconductive binary system containing 2-butanone and toluene with applied voltages of up to 30 kV. C1 Oak Ridge Natl Lab, Div Chem Technol, Oak Ridge, TN 37831 USA. RP Tsouris, C (reprint author), Oak Ridge Natl Lab, Div Chem Technol, Oak Ridge, TN 37831 USA. RI Tsouris, Costas/C-2544-2016 OI Tsouris, Costas/0000-0002-0522-1027 NR 16 TC 4 Z9 5 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0888-5885 J9 IND ENG CHEM RES JI Ind. Eng. Chem. Res. PD AUG 22 PY 2001 VL 40 IS 17 BP 3843 EP 3847 DI 10.1021/ie000869q PG 5 WC Engineering, Chemical SC Engineering GA 465DD UT WOS:000170573600016 ER PT J AU Mattsson, AE Kohn, W AF Mattsson, AE Kohn, W TI An energy functional for surfaces SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ELECTRON-GAS; DENSITY; APPROXIMATION AB We propose a simple way of correcting general gradient and local density approximation surface energies for errors of these approximations intrinsic to surfaces by the appropriate use of reference systems with an exponential surface potential v(eff)(z)proportional toe((z/a)). A test of this approach applied to general gradient and local density approximation surface exchange energies for half jellium systems removes most of the surface-intrinsic errors and yields excellent results. We suggest that the same procedure would also be successful for surface correlation effects. We conclude with some general remarks about future directions of density functional theory. (C) 2001 American Institute of Physics. C1 Royal Inst Technol, Dept Phys, S-10044 Stockholm, Sweden. Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA. RP Sandia Natl Labs, Surface & Interface Sci Dept MS 1415, POB 5800, Albuquerque, NM 87185 USA. NR 11 TC 54 Z9 55 U1 2 U2 4 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-9606 EI 1089-7690 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 22 PY 2001 VL 115 IS 8 BP 3441 EP 3443 DI 10.1063/1.1396649 PG 3 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 462AP UT WOS:000170396300002 ER PT J AU Feller, D Dixon, DA AF Feller, D Dixon, DA TI Extended benchmark studies of coupled cluster theory through triple excitations SO JOURNAL OF CHEMICAL PHYSICS LA English DT Review ID QUARTIC FORCE-FIELD; BASIS-SET CONVERGENCE; CORRELATED MOLECULAR CALCULATIONS; DIATOMIC DISSOCIATION-ENERGIES; EQUILIBRIUM POTENTIAL-ENERGY; ELECTRONIC-STRUCTURE METHODS; DENSITY-FUNCTIONAL THEORIES; HIGHER-ORDER CORRELATION; INITIO BINDING-ENERGIES; DIPOLE-MOMENT FUNCTIONS AB Coupled cluster theory through quasiperturbative triple excitations [CCSD(T)] was used with large correlation consistent basis sets to obtain optimized structures, harmonic vibrational frequencies and atomization energies for 37 molecules from the G2/97 test set. In some cases, it proved possible to include the triple excitations iteratively via CCSDT. Use of various correlation consistent basis set sequences facilitated estimation of frozen core energies in the complete basis set limit. Tight d functions were added for all second row atoms in order to improve the basis set convergence properties. Core/valence correlation corrections were obtained from all electron CCSD(T)/cc-pCVQZ calculations. Scalar relativistic contributions to the atomization energy were obtained from configuration interaction mass-velocity/one-electron Darwin calculations and CCSD(T) Douglas-Kroll-Hess calculations. By combining results from the present work with previously reported findings, a total of 114 comparisons with reliable experimental data for molecular atomization energies were possible. A statistical analysis of the level of agreement with experiment was performed, leading to a mean absolute deviation of 0.8 kcal/mol and maximum absolute error of -4.4 kcal/mol. This represents the most thorough study to date of the reliability of a composite approach to computational thermochemistry based on coupled cluster theory. The approach avoids the use of additivity approximations to estimate the complete basis set limit and does not include empirical corrections to the electronic energy. Results from three parameterized methods (G2, G3, and CBS-Q) for the same set of molecules are compared to the coupled cluster results. (C) 2001 American Institute of Physics. C1 Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. RP Feller, D (reprint author), Pacific NW Natl Lab, Environm Mol Sci Lab, MS K8-91,POB 999, Richland, WA 99352 USA. NR 102 TC 192 Z9 192 U1 0 U2 12 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 22 PY 2001 VL 115 IS 8 BP 3484 EP 3496 DI 10.1063/1.1388045 PG 13 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 462AP UT WOS:000170396300008 ER PT J AU Lenzer, T Yourshaw, I Furlanetto, MR Pivonka, NL Neumark, DM AF Lenzer, T Yourshaw, I Furlanetto, MR Pivonka, NL Neumark, DM TI Characterization of ArnCl(-) clusters (n=2-15) using zero electron kinetic energy and partially discriminated threshold photodetachment spectroscopy SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID DYNAMIC MULTIPOLE POLARIZABILITIES; NONADDITIVE INTERMOLECULAR FORCES; RARE-GAS SURFACES; OPEN-SHELL ATOMS; I-XEN CLUSTERS; EXCITED-STATES; DIPOLE POLARIZABILITIES; DISPERSION COEFFICIENTS; HALOGEN CHEMISTRY; TDMP2 CALCULATION AB ArnCl- clusters have been investigated by anion zero electron kinetic energy (ZEKE) and partially discriminated threshold photodetachment spectroscopy. The experiments yield size-dependent electron affinities (EAs) and electronic state splittings for the X, I, and II states accessed by photodetachment. Cluster minimum energy structures have been determined from calculations based on a "simulated annealing" approach employing our recently presented Ar-Cl(-) pair potentials from anion ZEKE spectroscopy [T. Lenzer, I. Yourshaw, M. R. Furlanetto, G. Reiser, and D. M. Neumark, J. Chem. Phys. 110, 9578 (1999)] and various nonadditive terms. The EAs calculated without many-body effects overestimate the experimental EAs by up to 1500 cm(-1). Repulsive many-body induction in the anion clusters is found to be the dominant nonadditive effect. In addition, the attractive interaction between the chloride charge and the Ar-2 exchange quadrupole is important. These findings are consistent with our earlier results for XenI-, ArnI-, and ArnBr- clusters and highlight again the necessity of an adequate implementation of many-body effects to describe the energetics of such systems. For ArnCl- clusters with n > 12 we find some deviations between experimental and calculated (0 K) EA which can be explained by the population of less stable anion structures due to the finite temperatures of the clusters in our experiments. This results in lower EAs than predicted for the corresponding global minimum energy structures. (C) 2001 American Institute of Physics. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Neumark, DM (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. RI Neumark, Daniel/B-9551-2009 OI Neumark, Daniel/0000-0002-3762-9473 NR 49 TC 27 Z9 27 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 22 PY 2001 VL 115 IS 8 BP 3578 EP 3589 DI 10.1063/1.1388202 PG 12 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 462AP UT WOS:000170396300018 ER PT J AU Bratko, D Curtis, RA Blanch, HW Prausnitz, JM AF Bratko, D Curtis, RA Blanch, HW Prausnitz, JM TI Interaction between hydrophobic surfaces with metastable intervening liquid SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID MOLECULAR-DYNAMICS SIMULATION; MONTE-CARLO METHOD; CAPILLARY EVAPORATION; PRESSURE-DEPENDENCE; NONWETTING LIQUID; HYDRATION FORCES; PHASE-TRANSITION; WATER INTERFACE; CONFINED FLUID; LENNARD-JONES AB Molecular simulation is used to elucidate hydrophobic interaction at atmospheric pressure where liquid water between apolar walls is metastable with respect to capillary evaporation. The steep increase of the estimated activation barrier of evaporation with surface-surface separation explains the apparent stability of the liquid at distances more than an order of magnitude below the thermodynamic threshold of evaporation. Solvation by metastable liquid results in a short-ranged oscillatory repulsion which gives rise to an irreversible potential barrier between approaching walls. The barrier increases with external pressure in accord with measured pressure-induced slowing of conformational transitions of biopolymers with strong hydrophobic interactions. At a sufficiently small separation, the force abruptly turns attractive signaling nucleation of the vapor phase. This behavior is consistent with the cavitation-induced hysteresis observed in a number of surface-force measurements for strongly hydrophobic surfaces at ambient conditions. (C) 2001 American Institute of Physics. C1 Univ Calif Berkeley, Coll Chem, Dept Chem Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Bratko, D (reprint author), Univ Calif Berkeley, Coll Chem, Dept Chem Engn, Berkeley, CA 94720 USA. NR 60 TC 80 Z9 81 U1 1 U2 17 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 22 PY 2001 VL 115 IS 8 BP 3873 EP 3877 DI 10.1063/1.1386926 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 462AP UT WOS:000170396300050 ER PT J AU Halley, JW Duan, Y Nielsen, B Redfern, PC Curtiss, LA AF Halley, JW Duan, Y Nielsen, B Redfern, PC Curtiss, LA TI Simulation of polyethylene oxide: Improved structure using better models for hydrogen and flexible walls SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID COMPUTER-SIMULATION; SAMPLES; LIQUID AB We describe calculations of the structure of amorphous polyethylene oxide using a previously reported model, but with better treatment of hydrogen positions and in a code which allows relaxation of stresses in the polymerized sample by Rahman-Parrinello techniques. We also report the effects of two different intermolecular force field potentials and find that our earlier, empirical force field produces better agreement with experimental neutron scattering results than a force field derived from ab initio electronic structure calculations. (C) 2001 American Institute of Physics. C1 Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Halley, JW (reprint author), Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA. NR 16 TC 14 Z9 14 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 22 PY 2001 VL 115 IS 8 BP 3957 EP 3966 DI 10.1063/1.1386922 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 462AP UT WOS:000170396300059 ER PT J AU Liu, XZ Wu, ZZ Cai, H Yang, YH Chen, TN Vallet, CE Zuhr, RA Beach, DB Peng, ZH Wu, YD Concolino, TE Rheingold, AL Xue, ZL AF Liu, XZ Wu, ZZ Cai, H Yang, YH Chen, TN Vallet, CE Zuhr, RA Beach, DB Peng, ZH Wu, YD Concolino, TE Rheingold, AL Xue, ZL TI Reactions of tetrakis(dimethylamide)-titanium, -zirconium and -hafnium with silanes: Synthesis of unusual amide hydride complexes and mechanistic studies of titanium-silicon-nitride (Ti-Si-N) formation SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Review ID CHEMICAL-VAPOR-DEPOSITION; ANIONIC PI-LIGANDS; COPPER INTERCONNECT APPLICATIONS; DIFFUSION-BARRIERS; THIN-FILMS; PHASE CHEMISTRY; SILYL; REACTIVITY; ALKYL; ELIMINATION AB M(NMe2)(4) (M = Ti, Zr, Hf) were found to react with H2SiR ' Ph (R ' = H, Me, Ph) to yield H-2, arninosilanes, and black solids. Unusual amide hydride complexes [(Me2N)(3)M(mu -H)(mu -NMe2)(2)](2)M (M = Zr, 1; Hf, 2) were observed to be intermediates and characterized by single-crystal X-ray diffraction. [(Me2N)(3)M(mu -D)(mu -NMC2)(2)](2)M (1d(2), 2d(2)) were prepared through reactions of M(NMe2)(4) with D2SiPh2. Reactions of (Me2N)(3)ZrSi(SiMe3)(3) (5) with H2SiR ' Ph were found to give aminosilanes and (Me2N)(2)Zr(H)Si(SiMe3)(3) (6). These reactions are reversible through unusual equilibria such as (Me2N)(3)ZrSi(SiMe3)(3) (5) + H2SiPh2 reversible arrow (Me2N)(2)Zr(H)Si(SiMe3)(3) (6) + HSi(NMe2)Ph-2. The deuteride ligand in (Me2N)(2)Zr(D)Si(SiMe3)(3) (6-d(1)) undergoes H-D exchange with H2SiR ' Ph (R ' = Me, H) to give 6 and HDSiR ' Ph. The reaction of Ti(NMe2)(4) with SiH4 in chemical vapor deposition at 450 degreesC yielded thin Ti-Si-N ternary films containing TiN and Si3N4. Ti(NMe2)(4) reacts with SiH4 at 23 degreesC to give H-2, HSi(NMe2)(3), and a black solid. HNMe2 was not detected in this reaction. The reaction mixture, upon heating, gave TiN and Si3N4 powders. Analyses and reactivities of the black solid revealed that it contained -H and unreacted -NMe2 ligands but no silicon-containing ligand. Ab initio quantum chemical calculations of the reactions of Ti(NR2)(4) (R = Me, H) with SiH4 indicated that the formation of aminosilanes and HTi(NR2)(3) was favored. These calculations also showed that HTi(NH2)(3) (3b) reacted with SiH4 or H3Si-NH2 in the following step to give H2Ti(NH2)(2) (4b) and aminosilanes. The results in the current studies indicated that the role of SiH4 in its reaction with Ti(NMe2)4 was mainly to remove amide ligands as HSi(NMe2)3. The removal of amide ligands is incomplete, and the reaction thus yielded "=Ti(H)(NMe2)" as the black solid. Subsequent heating of the black solid and HSi-(NMe2)(3) may then yield TiN and Si3N4, respectively, as the Ti-Si-N materials. C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem & Analyt Sci, SMAC, Res Ctr, Oak Ridge, TN 37831 USA. Hong Kong Univ Sci & Technol, Dept Chem, Hong Kong, Hong Kong, Peoples R China. Univ Delaware, Dept Chem & Biochem, Newark, DE 19716 USA. RP Beach, DB (reprint author), Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. RI Wu, Yun-Dong/G-8463-2013 NR 121 TC 41 Z9 41 U1 2 U2 23 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 AUG 22 PY 2001 VL 123 IS 33 BP 8011 EP 8021 DI 10.1021/ja010744s PG 11 WC Chemistry, Multidisciplinary SC Chemistry GA 463TW UT WOS:000170494200007 PM 11506557 ER PT J AU Saxena, S Wong-Foy, A Moule, AJ Seeley, JA McDermott, R Clarke, J Pines, A AF Saxena, S Wong-Foy, A Moule, AJ Seeley, JA McDermott, R Clarke, J Pines, A TI Resolution of Xe-129 chemical shifts at ultralow magnetic field SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID LASER-POLARIZED XE-129; CRYPTOPHANE-A; NOBLE-GAS; NMR-SPECTROSCOPY; XENON NMR; ENHANCEMENT; RESONANCE; ZEOLITE; MRI; ADSORPTION C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. RP Pines, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RI Moule, Adam/B-9484-2013; OI Moule, Adam/0000-0003-1354-3517; Saxena, Sunil/0000-0001-9098-6114 NR 39 TC 9 Z9 9 U1 0 U2 6 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 AUG 22 PY 2001 VL 123 IS 33 BP 8133 EP 8134 DI 10.1021/ja011064s PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 463TW UT WOS:000170494200027 PM 11506577 ER PT J AU Mojet, BL Eckert, J van Santen, RA Albinati, A Lechner, RE AF Mojet, BL Eckert, J van Santen, RA Albinati, A Lechner, RE TI Evidence for chemisorbed molecular hydrogen in Fe-ZSM5 from inelastic neutron scattering SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID FE/ZSM-5 CATALYSTS; NA-A; ZEOLITES; NOX; OXIDATION; SPECTROSCOPY; REDUCTION; COMPLEXES; SURFACES; DYNAMICS C1 Los Alamos Natl Lab, Los Alamos, NM USA. Eindhoven Univ Technol, Schuit Inst Catalysis, NL-5600 MB Eindhoven, Netherlands. Univ Milan, Ist Chim Farmaceut, I-20131 Milan, Italy. Hahn Meitner Inst Kernforsch Berlin GmbH, D-14109 Berlin, Germany. RP Eckert, J (reprint author), Los Alamos Natl Lab, LANSCE MS H805, Los Alamos, NM USA. RI van Santen, Rutger/B-4771-2013; Albinati, Alberto/I-1262-2015 OI Albinati, Alberto/0000-0002-8779-3327 NR 26 TC 31 Z9 31 U1 2 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 22 PY 2001 VL 123 IS 33 BP 8147 EP 8148 DI 10.1021/ja016078c PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 463TW UT WOS:000170494200034 PM 11506584 ER PT J AU List, EJW Kim, CH Graupner, W Leising, G Shinar, J AF List, EJW Kim, CH Graupner, W Leising, G Shinar, J TI Singlet exciton quenching by polarons in pi-conjugated wide bandgap semiconductors: a combined optical and charge transport study SO MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY LA English DT Article; Proceedings Paper CT 2nd Asia Pacific Symposium of Organic Electroluminescent Materials and Devices (APOELMD)/International-Union-of-Materials-Research-Societies (IUMRS-ICA2000) CY 2000 CL CITY UNIV HONG KONG, HONG KONG, PEOPLES R CHINA HO CITY UNIV HONG KONG DE photoluminescence; photoluminescence-detected magnetic resonance; singlet excitons; PL-quenching ID LADDER-TYPE POLY(PARA-PHENYLENE); EXCITATIONS; POLYMERS; POLY(P-PHENYLENEVINYLENE); PHOTOGENERATION; OLIGOMERS; DEFECTS; FILMS AB The photoluminescence (PL)-detected magnetic resonance (PLDMR) of various pi -conjugated materials, such as methyl-substituted ladder-type poly(p-phenylene), para-hexaphenyl (PHP) films. and ladder-type oligophenylenes are described. The optical measurements are compared to a thermally stimulated current (TSC) study of defects in m-LPPP and PHP. As TSC probes the density of mobile charge carriers after detrapping and PLDMR reveals the influence of trapped charges on the PL, their combination yields the concentration of traps, their energetic position, and their contribution to PL quenching. The TSC measurements reveal trap densities greater than or equal to 1.6 x 10(16) and 1.4 x 10(14) cm(-3) in m-LPPP and PHP, respectively. From a comparison of the PLDMR and TSC results one finds that the interaction and hence the nonradiative quenching of singlet excitons (SE's) at polarons is stronger in PHP than in m-LPPP due to a higher diffusivity of SE's in PHP. All of the results are in excellent quantitative agreement with a rate-equation model in which the positive (PL-enhancing) spin 1/2 PLDMR is due to the role of polarons in nonradiative quenching of SE's. The results also suggest that this quenching process is very significant in luminescent pi -conjugated materials and organic light-emitting devices, and should be taken into account, especially at high excitation densities such as in lasing action. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Iowa State Univ Sci & Technol, Ames Lab, USDOE, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Dept Phys & Astron, Ames, IA 50011 USA. Graz Tech Univ, Inst Festkorperphys, A-8010 Graz, Austria. Virginia Tech, Dept Phys, Blacksburg, VA 24061 USA. EMagin Corp, Hopewell Jct, NY 12533 USA. RP Shinar, J (reprint author), Iowa State Univ Sci & Technol, Ames Lab, USDOE, Ames, IA 50011 USA. RI List-Kratochvil, Emil/M-5312-2013 NR 23 TC 8 Z9 8 U1 1 U2 6 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5107 J9 MAT SCI ENG B-SOLID JI Mater. Sci. Eng. B-Solid State Mater. Adv. Technol. PD AUG 22 PY 2001 VL 85 IS 2-3 SI SI BP 218 EP 223 DI 10.1016/S0921-5107(01)00588-8 PG 6 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA 459JR UT WOS:000170247700030 ER PT J AU Savvate'ev, V Friedl, JH Zou, L Shinar, J Christensen, K Oldham, W Rothberg, LJ Chen-Esterlit, Z Kopelman, R AF Savvate'ev, V Friedl, JH Zou, L Shinar, J Christensen, K Oldham, W Rothberg, LJ Chen-Esterlit, Z Kopelman, R TI Nanosecond electroluminescence spikes from multilayer blue 4,4 '-bis(2,2 '-diphenyl vinyl)-1,1 '-biphenyl (DPVBi) organic light-emitting devices SO MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY LA English DT Article; Proceedings Paper CT 2nd Asia Pacific Symposium of Organic Electroluminescent Materials and Devices (APOELMD)/International-Union-of-Materials-Research-Societies (IUMRS-ICA2000) CY 2000 CL CITY UNIV HONG KONG, HONG KONG, PEOPLES R CHINA HO CITY UNIV HONG KONG DE transient electroluminescence; nanosecond electroluminescence; EL spike; 4,4 '-bis(2,2 ' diphenyl vinyl)-1,1 '-biphenyl (DPVBi) ID TRANSIENT ELECTROLUMINESCENCE; DIODES; CATHODE AB Nanosecond electroluminescence (EL) spikes observed at the voltage turn-off when multilayer blue DPVBi-based organic light-emitting devices (OLEDs) are excited by rectangular voltage pulses are described. The spikes exceed the cw brightness by up to an order of magnitude. Time-resolved images of the devices demonstrate that the emission from most of the sample surface decays with a single time constant tau (1) = 13 +/- 3 ns. This decay is attributed to recombination of charges, which accumulate at the interface of the electron and hole transporting layers, possibly at intrinsic trapping sites. In areas of increased electron injection and EL such as cathode edges and morphological defects, a second slower decay time 20 ns < tau (2) < 1 ?s is observed, apparently due to release of carriers from localized trap states in the organic/cathode interface. Only marginal variations in tau (1) are found between bright and dim areas of the devices. At a bias of 10 V, the amplitude of the spike is found to peak at a pulse duration of similar to 20 mus. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Iowa State Univ Sci & Technol, Ames Lab, USDOE, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Dept Phys & Astron, Ames, IA 50011 USA. Univ Michigan, Sch Med, Dept Microbiol & Immunol, Ann Arbor, MI 48109 USA. Univ Rochester, Dept Chem, Rochester, NY 14627 USA. Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA. RP Shinar, J (reprint author), Iowa State Univ Sci & Technol, Ames Lab, USDOE, Ames, IA 50011 USA. RI Christensen, Kenneth/D-3460-2017 NR 10 TC 3 Z9 3 U1 2 U2 3 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5107 J9 MAT SCI ENG B-SOLID JI Mater. Sci. Eng. B-Solid State Mater. Adv. Technol. PD AUG 22 PY 2001 VL 85 IS 2-3 SI SI BP 224 EP 227 DI 10.1016/S0921-5107(01)00589-X PG 4 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA 459JR UT WOS:000170247700031 ER PT J AU Jeong, B Wang, LQ Gutowska, A AF Jeong, B Wang, LQ Gutowska, A TI Biodegradable thermoreversible gelling PLGA-g-PEG copolymers SO CHEMICAL COMMUNICATIONS LA English DT Article ID TRIBLOCK COPOLYMERS; AQUEOUS-SOLUTIONS; ASSOCIATION; RELEASE AB The thermogelling aqueous Solution Of poly(DL-lactic acid-co-glycolic acid) grafted with poly(ethylene glycol)s is developed, and the elegant instrumental methods to determine sol-gel transition temperature and the method to control get duration are reported. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Jeong, B (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd,POB 999,K2-44, Richland, WA 99352 USA. NR 15 TC 53 Z9 56 U1 3 U2 18 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD,, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1359-7345 J9 CHEM COMMUN JI Chem. Commun. PD AUG 21 PY 2001 IS 16 BP 1516 EP 1517 DI 10.1039/b102819g PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 465AD UT WOS:000170564800047 ER PT J AU Groves, JT Mahal, LK Bertozzi, CR AF Groves, JT Mahal, LK Bertozzi, CR TI Control of cell adhesion and growth with micropatterned supported lipid membranes SO LANGMUIR LA English DT Letter ID SELF-ASSEMBLED MONOLAYERS; PHOSPHOLIPID-BILAYERS; ENDOTHELIAL-CELLS; PLANAR MEMBRANES; LATERAL MOBILITY; MAMMALIAN-CELLS; T-CELLS; SURFACES; PROTEINS; RECOGNITION AB In this work, phospholipid bilayers are employed as biomimetic coating materials to modulate the adhesion and growth of cells on solid substrates. A variety of lipid compositions and charge densities are examined. Culturing cells on these supported membranes reveals that fluid lipid bilayers generally block cell adhesion with a notable exception provided by membranes containing phosphatidylserine, which strongly promote adhesion and growth. This dichotomy is utilized with micropatterned membrane technology to selectively direct cell growth to specified regions on a substrate. Lipid composition in micropatterned membrane arrays is demonstrated to be a simple and effective means of patterning cell growth on surfaces. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA. RP Groves, JT (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. RI Wunder, Stephanie/B-5066-2012; Zdilla, Michael/B-4145-2011 NR 41 TC 98 Z9 100 U1 1 U2 26 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD AUG 21 PY 2001 VL 17 IS 17 BP 5129 EP 5133 DI 10.1021/la010481f PG 5 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 465DF UT WOS:000170573800002 ER PT J AU Baringer, P Bross, A Buescher, V Canelli, F Davis, G Del Signore, K Desai, S Estrada, J Ginther, G Gordeev, A Grannis, P Grunendahl, S Hou, S Kotcher, J Lincoln, D Liu, M Mayorov, AA Neal, HA Nunnemann, T Patwa, A Qian, J Rijssenbeek, M Rubinov, P Sawyer, L Talalaevskii, A Turcot, AS Van Kooten, R Wang, ZM Warchol, J Wayne, M Yamin, P Yip, K Zhou, B AF Baringer, P Bross, A Buescher, V Canelli, F Davis, G Del Signore, K Desai, S Estrada, J Ginther, G Gordeev, A Grannis, P Grunendahl, S Hou, S Kotcher, J Lincoln, D Liu, M Mayorov, AA Neal, HA Nunnemann, T Patwa, A Qian, J Rijssenbeek, M Rubinov, P Sawyer, L Talalaevskii, A Turcot, AS Van Kooten, R Wang, ZM Warchol, J Wayne, M Yamin, P Yip, K Zhou, B TI Cosmic-ray tests of the DO preshower detector SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID SCINTILLATING STRIPS AB The DO preshower detector consists of scintillator strips with embedded wavelength-shifting fibers, and a readout using Visible Light Photon Counters. The response to minimum ionizing particles has been tested with cosmic-ray muons. We report results on the gain calibration and light-yield distributions. The spatial resolution is investigated taking into account the light sharing between strips, the effects of multiple scattering and various systematic uncertainties. The detection efficiency and noise contamination are also investigated. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Kansas, Lawrence, KS 66045 USA. Univ Rochester, Rochester, NY 14627 USA. Univ Michigan, Ann Arbor, MI 48109 USA. SUNY Stony Brook, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. Indiana Univ, Bloomington, IN 47405 USA. Louisiana Tech Univ, Ruston, LA 71272 USA. Univ Notre Dame, Notre Dame, IN 46556 USA. RP Hou, S (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. RI Yip, Kin/D-6860-2013; Canelli, Florencia/O-9693-2016 OI Yip, Kin/0000-0002-8576-4311; Canelli, Florencia/0000-0001-6361-2117 NR 20 TC 11 Z9 11 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 21 PY 2001 VL 469 IS 3 BP 295 EP 310 DI 10.1016/S0168-9002(01)00781-1 PG 16 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 470DJ UT WOS:000170854900001 ER PT J AU Kudenko, YG Littenberg, LS Mayatski, VA Mineev, OV Yershov, NV AF Kudenko, YG Littenberg, LS Mayatski, VA Mineev, OV Yershov, NV TI Extruded plastic counters with WLS fiber readout SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE extruded plastics; lead-plastic sandwich; WLS readout ID SCINTILLATOR AB Extruded plastic scintillation counters with WLS fiber readout are described. For a 7 mm thick counter with 4.3 m long double-clad fibers spaced at 7 mm a light yield of 18.7 photoelectrons/MeV and a time resolution of 0.71 ns (sigma) were obtained. A prototype photon veto module consisting of 10 layers of 7 mm thick grooved plastic slabs interleaved with 1 mm lead sheets was also tested, which yielded 122 photoelectrons per minimum ionizing particle and time resolution of 360 ps. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia. Brookhaven Natl Lab, Upton, NY 11973 USA. AO Uniplast, Vladimir 600016, Russia. RP Mineev, OV (reprint author), Russian Acad Sci, Inst Nucl Res, 60Th October Revol Pr 7A, Moscow 117312, Russia. OI Littenberg, Laurence/0000-0001-8373-7179 NR 7 TC 19 Z9 19 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD AUG 21 PY 2001 VL 469 IS 3 BP 340 EP 346 DI 10.1016/S0168-9002(01)00780-X PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 470DJ UT WOS:000170854900006 ER PT J AU Georgsson, M Anders, W Kramer, D Byrd, JM AF Georgsson, M Anders, W Kramer, D Byrd, JM TI Design and commissioning of third harmonic cavities at BESSY II SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE accelerators; cavities; Touschek lifetime; Landau damping; bunch lengthening; higher order modes AB We report on the design and commissioning of passive third ham-ionic cavities that have been installed in BESSY-II, a third generation high brightness synchrotron light source, Four cavities were installed to lengthen the electron bunches and increase the beam lifetime which is dominated by large angle intrabeam (Touschek) scattering. During routine user operation the system is running stable in a low power mode resulting in a current dependent bunch lengthening of up to a factor of 1.4, resulting in a significant improvement of beam lifetime. We also observed longitudinal stabilization of the beam using the cavities without the use of longitudinal feedback. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Lund Univ, Max Lab, S-22100 Lund, Sweden. BESSY, D-12489 Berlin, Germany. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. RP Georgsson, M (reprint author), Lund Univ, Max Lab, Box 118, S-22100 Lund, Sweden. NR 7 TC 5 Z9 5 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 21 PY 2001 VL 469 IS 3 BP 373 EP 381 DI 10.1016/S0168-9002(01)00783-5 PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 470DJ UT WOS:000170854900010 ER PT J AU Foy, BR McVey, BD Petrin, RR Tiee, JJ Wilson, CW AF Foy, BR McVey, BD Petrin, RR Tiee, JJ Wilson, CW TI Remote mapping of vegetation and geological features by lidar in the 9-11-mu m region SO APPLIED OPTICS LA English DT Article ID LASER-INDUCED FLUORESCENCE; TARGET REFLECTANCE MEASUREMENTS; ANGLE SPECKLE CORRELATION; CO2 LIDAR; 2-DIMENSIONAL FRAUNHOFER; CO2-LASER WAVELENGTHS; SURFACE-ROUGHNESS; SCANNING LIDAR; SYSTEM; AVIRIS AB We report examples of the use of a scanning tunable CO2 laser lidar system in the 9-11-mum region to construct images of vegetation and rocks at ranges as far as 5 km from the instrument. Range information is combined with horizontal and vertical distances to yield an image with three spatial dimensions simultaneous with the classification of target type. Object classification is based on reflectance spectra, which are sufficiently distinct to allow discrimination between several tree species, between trees and scrub vegetation, and between natural and artificial targets. Limitations imposed by laser speckle noise are discussed. (C) 2001 Optical Society of America. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Foy, BR (reprint author), Los Alamos Natl Lab, POB 1663,MS J567, Los Alamos, NM 87545 USA. EM bfoy@lanl.gov NR 53 TC 8 Z9 8 U1 1 U2 2 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 1559-128X EI 2155-3165 J9 APPL OPTICS JI Appl. Optics PD AUG 20 PY 2001 VL 40 IS 24 BP 4344 EP 4352 DI 10.1364/AO.40.004344 PG 9 WC Optics SC Optics GA 464QM UT WOS:000170543300046 PM 18360475 ER PT J AU Merkulov, VI Guillorn, MA Lowndes, DH Simpson, ML Voelkl, E AF Merkulov, VI Guillorn, MA Lowndes, DH Simpson, ML Voelkl, E TI Shaping carbon nanostructures by controlling the synthesis process SO APPLIED PHYSICS LETTERS LA English DT Article ID GROWTH; NANOTUBES AB The ability to control the nanoscale shape of nanostructures in a large-scale synthesis process is an essential and elusive goal of nanotechnology research. Here, we report significant progress toward that goal. We have developed a technique that enables controlled synthesis of nanoscale carbon structures with conical and cylinder-on-cone shapes and provides the capability to dynamically change the nanostructure shape during the synthesis process. In addition, we present a phenomenological model that explains the formation of these nanostructures and provides insight into methods for precisely engineering their shape. Since the growth process we report is highly deterministic in allowing large-scale synthesis of precisely engineered nanoscale components at defined locations, our approach provides an important tool for a practical nanotechnology. (C) 2001 American Institute of Physics. C1 Oak Ridge Natl Lab, Mol Scale Engn & Nanoscale Technol Res Grp, Oak Ridge, TN 37831 USA. Univ Tennessee, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Merkulov, VI (reprint author), Oak Ridge Natl Lab, Mol Scale Engn & Nanoscale Technol Res Grp, Oak Ridge, TN 37831 USA. RI Simpson, Michael/A-8410-2011 OI Simpson, Michael/0000-0002-3933-3457 NR 7 TC 143 Z9 147 U1 1 U2 21 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 20 PY 2001 VL 79 IS 8 BP 1178 EP 1180 DI 10.1063/1.1395517 PG 3 WC Physics, Applied SC Physics GA 462PM UT WOS:000170429000036 ER PT J AU Robinson, GP AF Robinson, GP TI Nuclear weapons - A role beyond MAD SO AVIATION WEEK & SPACE TECHNOLOGY LA English DT Editorial Material C1 Sandia Natl Labs, Livermore, CA 94550 USA. RP Robinson, GP (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MCGRAW HILL INC PI NEW YORK PA 1221 AVENUE OF THE AMERICAS, NEW YORK, NY 10020 USA SN 0005-2175 J9 AVIAT WEEK SPACE TEC JI Aviat. Week Space Technol. PD AUG 20 PY 2001 VL 155 IS 8 BP 78 EP 78 PG 1 WC Engineering, Aerospace SC Engineering GA 465WW UT WOS:000170613800036 ER PT J AU Kevrekidis, PG Rasmussen, KO Bishop, AR AF Kevrekidis, PG Rasmussen, KO Bishop, AR TI The discrete nonlinear Schrodinger equation: A survey of recent results SO INTERNATIONAL JOURNAL OF MODERN PHYSICS B LA English DT Review ID INTRINSIC LOCALIZED MODES; WAVE-GUIDE ARRAYS; DIFFERENTIAL-DIFFERENCE EQUATIONS; SELF-TRAPPING EQUATION; STATISTICAL-MECHANICS; DNA DENATURATION; OSCILLATORY INSTABILITIES; INTERNAL-MODES; SOLITARY WAVES; 2-DIMENSIONAL SOLITONS AB In this paper we review a number of recent developments in the study of the Discrete Nonlinear Schrodinger (DNLS) equation. Results concerning ground and excited states, their construction, stability and bifurcations are presented in one and two spatial dimensions. Combinations of such steady states lead to the study of coherent structure bound states. A special case of such structures axe the so-called twisted modes and their two-dimensional discrete vortex generalization. The ideas oil such multi-coherent structures and their interactions are also useful in treating finite system effects through the image method. The statistical mechanics of the system is also analyzed and the partition function calculated in one spatial dimension using the transfer integral method. Finally, a number of open problems and future directions in the field are proposed. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. RP Kevrekidis, PG (reprint author), Univ Massachusetts, Dept Math & Stat, Amherst, MA 01003 USA. RI Rasmussen, Kim/B-5464-2009 OI Rasmussen, Kim/0000-0002-4029-4723 NR 136 TC 275 Z9 277 U1 3 U2 25 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0217-9792 J9 INT J MOD PHYS B JI Int. J. Mod. Phys. B PD AUG 20 PY 2001 VL 15 IS 21 BP 2833 EP 2900 DI 10.1142/S0217979201007105 PG 68 WC Physics, Applied; Physics, Condensed Matter; Physics, Mathematical SC Physics GA 481HQ UT WOS:000171514200001 ER PT J AU Cohen, ML AF Cohen, ML TI Nanotubes, nanoscience, and nanotechnology SO MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS LA English DT Article DE nanotubes; nanoscience; nanotechnology ID BORON-NITRIDE NANOTUBES; CARBON NANOTUBES; ELECTRONIC-PROPERTIES; GRAPHITIC CARBON; QUANTUM DOTS; TUBULE FORMS; SOLID C-36; PSEUDOPOTENTIALS; NANOCRYSTALS; MICROTUBULES AB The theoretical underpinnings of the properties of nanostructures has become a frontier activity in materials science. Although ab initio and empirically based calculations of the properties of bulk materials and their surfaces have advanced significantly in the past several decades, the extension of these methods to nanocrystals, nanotubes, and large molecular structures is not trivial or automatic. However, considerable progress has been made. Here, we review the status of the theoretical efforts to predict and explain properties of bulk solids and then describe extensions and applications to nanoscience and nanotechnology. (C) 2001 Elsevier Science B.V. All lights reserved. C1 Univ Calif Berkeley, Dept Phys 7300, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Cohen, ML (reprint author), Univ Calif Berkeley, Dept Phys 7300, Berkeley, CA 94720 USA. EM mlcohen@uclink.berkeley.edu NR 66 TC 69 Z9 69 U1 2 U2 18 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0928-4931 J9 MAT SCI ENG C-BIO S JI Mater. Sci. Eng. C-Biomimetic Supramol. Syst. PD AUG 20 PY 2001 VL 15 IS 1-2 SI SI BP 1 EP 11 DI 10.1016/S0928-4931(01)00221-1 PG 11 WC Materials Science, Multidisciplinary SC Materials Science GA 467NA UT WOS:000170709600001 ER PT J AU Desnica, UV Gamulin, O Tonejc, A Ivanda, M White, CW Sonder, E Zuhr, RA AF Desnica, UV Gamulin, O Tonejc, A Ivanda, M White, CW Sonder, E Zuhr, RA TI CdS nanocrystals formed in SiO2 substrates by ion implantation SO MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS LA English DT Article DE nanocrystals; cadmium sulfide; CdS; II-VI; implantation ID CRYSTALLITES AB In this work, CdS nanocrystal were formed in SiO2 substrates by implantation of Cd and S atoms (up to 10(17)/cm(2)) and subsequent annealing (up to 900 degreesC). The implanted and annealed layer was studied by X-ray diffraction (XRD), UV transmittance and reflectance measurements (energy range 1.4-6.5 eV), and Raman spectroscopy. Upon annealing, all methods proved the synthesis of CdS crystallites from the starting components, and the features characteristic of the CdS-phase were strongly and consistently dependent on ion dose and annealing temperature. The analysis of the results shows that by implantation and post-implantation treatment, the average size of CdS crystallites can be controlled, and that smaller CdS nanocrystals are obtained for lower doses and lower annealing temperatures. (C) 2001 Elsevier Science BN. All rights reserved. C1 Rudjer Boskovic Inst, Dept Phys, Div Mat Phys, Semicond Lab, HR-10000 Zagreb, Croatia. Univ Zagreb, Sch Med, HR-10000 Zagreb, Croatia. Univ Zagreb, Dept Phys, HR-10000 Zagreb, Croatia. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Desnica, UV (reprint author), Rudjer Boskovic Inst, Dept Phys, Div Mat Phys, Semicond Lab, Bijenicka 54, HR-10000 Zagreb, Croatia. RI Ivanda, Mile/J-3772-2012; OI Ivanda, Mile/0000-0002-3785-8321; Gamulin, Ozren/0000-0001-6046-9773 NR 8 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0928-4931 J9 MAT SCI ENG C-BIO S JI Mater. Sci. Eng. C-Biomimetic Supramol. Syst. PD AUG 20 PY 2001 VL 15 IS 1-2 SI SI BP 105 EP 107 DI 10.1016/S0928-4931(01)00262-4 PG 3 WC Materials Science, Multidisciplinary SC Materials Science GA 467NA UT WOS:000170709600024 ER PT J AU Cabelli, DE Shafiq, F Creutz, C Bullock, RM AF Cabelli, DE Shafiq, F Creutz, C Bullock, RM TI Pulse radiolysis studies of water-soluble tungsten hydride complexes: One-electron reduction of metal hydrides and hydrogen atom transfer reactions SO ORGANOMETALLICS LA English DT Article ID AQUEOUS-SOLUTION; INTRINSIC BARRIERS; CARBONYL HYDRIDES; HOMOGENEOUS CATALYSIS; MARCUS THEORY; RADICALS; PROTON; BONDS; OXIDATION; RATES AB The reactivity of the previously (Organometallics 2000, 19, 824-833) prepared hydride complexes (C5H4CO2H)L(CO)(2)WH (L = CO, PMe3) and the corresponding metal-metal dimers [(C5H4CO2H)L(CO)(2)W](2) in pulse radiolysis studies in aqueous solution is reported. The disappearance of e(aq)(-) was monitored to determine the rate constants for one-electron reduction. The smallest reduction rate constant was obtained for the dianion (C5H4CO2)-(CO)(3) W2- (4.3 x 10(9) M-1 s(-1)), and the largest value (1.2 x 10(10) M-1 s(-1)) was observed for its conjugate acid (C5H4CO2)(CO)(3)WH-. For the PMe3-substituted complexes, the dimer reduction rate constant was about twice as large as that for the hydride (k = 8.4 x 10(9) M-1 s(-1)). Rate constants for reaction with CO2-, 3.2 x 10(8) (pH 5) and 3.0 x 10(7) (pH 9.7) M-1 s(-1), were determined for (C5H4CO2)(CO)(3)WH- and (C5H4CO2)(PMe3)(CO)(2)WH-, respectively. Rate constants for the reactions of the hydride complexes with the carbon-centered radical from tert-butyl alcohol and the a-hydroxy radicals from ethanol and 2-propanol radicals were in the ranges (0.9-4.8) x 10(8) and (0.3-0.6) x 10(9) M-1 s(-1) for (C5H4CO2)(CO)(3)WH- and (C5H4CO2)(PMe3)(CO)(2)WH-, respectively. The transient produced in all of these reactions was the metal radical, which was observed to dimerize with k = 2.4 x 10(9) and 2.2 x 10(8) M-1 s(-1) for (C5H4CO2)(CO)(3)WH- and (C5H4CO2)(PMe3)(CO)(2)WH-, respectively. C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP Cabelli, DE (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RI Bullock, R. Morris/L-6802-2016 OI Bullock, R. Morris/0000-0001-6306-4851 NR 70 TC 7 Z9 7 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD AUG 20 PY 2001 VL 20 IS 17 BP 3729 EP 3737 DI 10.1021/om010209089 PG 9 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA 464CM UT WOS:000170515600021 ER PT J AU Adler, C Ahammed, Z Allgower, C Amonett, J Anderson, BD Anderson, M Averichev, GS Balewski, J Barannikova, O Barnby, LS Baudot, J Bekele, S Belaga, VV Bellwied, R Berger, J Bichsel, H Bland, LC Blyth, CO Bonner, BE Bossingham, R Boucham, A Brandin, A Cadman, RV Caines, H Sanchez, MCD Cardenas, A Carroll, J Castillo, J Castro, M Cebra, D Chattopadhyay, S Chen, ML Chen, Y Chernenko, SP Cherney, M Chikanian, A Choi, B Christie, W Coffin, JP Conin, L Cormier, TM Cramer, JG Crawford, HJ DeMello, M Deng, WS Derevschikov, AA Didenko, L Draper, JE Dunin, VB Dunlop, JC Eckardt, V Efimov, LG Emelianov, V Engelage, J Eppley, G Erazmus, B Fachini, P Faine, V Finch, E Fisyak, Y Flierl, D Foley, KJ Fu, J Gagunashvili, N Gans, J Gaudichet, L Germain, M Geurts, F Ghazikhanian, V Grabski, J Grachov, O Greiner, D Grigoriev, V Guedon, M Gushin, E Hallman, TJ Hardtke, D Harris, JW Heffner, M Heppelmann, S Herston, T Hippolyte, B Hirsch, A Hjort, E Hoffmann, GW Horsley, M Huang, HZ Humanic, TJ Hummler, H Igo, G Ishihara, A Ivanshin, YI Jacobs, P Jacobs, WW Janik, M Johnson, I Jones, PG Judd, E Kaneta, M Kaplan, M Keane, D Kisiel, A Klay, J Klein, SR Klyachko, A Konstantinov, AS Kotchenda, L Kovalenko, AD Kramer, M Kravtsov, P Krueger, K Kuhn, C Kulikov, AI Kunde, GJ Kunz, CL Kutuev, RK Kuznetsov, AA Lakehal-Ayat, L Lamas-Valverde, J Lamont, MAC Landgraf, JM Lange, S Lansdell, CP Lasiuk, B Laue, F Lebedev, A LeCompte, T Lednicky, R Leontiev, VM LeVine, MJ Li, Q Li, Q Lindenbaum, SJ Lisa, MA Ljubicic, T Llope, WJ LoCurto, G Long, H Longacre, RS Lopez-Noriega, M Love, WA Lynn, D Majka, R Margetis, S Martin, L Marx, J Matis, HS Matulenko, YA McShane, TS Meissner, F Melnick, Y Meschanin, A Messer, M Miller, ML Milosevich, Z Minaev, NG Mitchell, J Moiseenko, VA Moltz, D Moore, CF Morozov, V de Moura, MM Munhoz, MG Mutchler, GS Nelson, JM Nevski, P Nikitin, VA Nogach, LV Norman, B Nurushev, SB Odyniec, G Ogawa, A Okorokov, V Oldenburg, M Olson, D Paic, G Pandey, SU Panebratsev, Y Panitkin, SY Pavlinov, AI Pawlak, T Perevoztchikov, V Peryt, W Petrov, VA Pinganaud, W Platner, E Pluta, J Porile, N Porter, J Poskanzer, AM Potrebenikova, E Prindle, D Pruneau, C Radomski, S Rai, G Ravel, O Ray, RL Razin, SV Reichhold, D Reid, JG Retiere, F Ridiger, A Ritter, HG Roberts, JB Rogachevski, OV Romero, JL Roy, C Russ, D Rykov, V Sakrejda, I Sandweiss, J Saulys, AC Savin, I Schambach, J Scharenberg, RP Schweda, K Schmitz, N Schroeder, LS Schuttauf, A Seger, J Seliverstov, D Seyboth, P Shahaliev, E Shestermanov, KE Shimanskii, SS Shvetcov, VS Skoro, G Smirnov, N Snellings, R Sowinski, J Spinka, HM Srivastava, B Stephenson, EJ Stock, R Stolpovsky, A Strikhanov, M Stringfellow, B Stroebele, H Struck, C Suaide, AAP Sugarbaker, E Suire, C Sumbera, M Symons, TJM de Toledo, AS Szarwas, P Takahashi, J Tang, AH Thomas, JH Tikhomirov, V Trainor, TA Trentalange, S Tokarev, M Tonjes, MB Trofimov, V Tsai, O Turner, K Ullrich, T Underwood, DG Van Buren, G VanderMolen, AM Vanyashin, A Vasilevski, IM Vasiliev, AN Vigdor, SE Voloshin, SA Wang, F Ward, H Watson, JW Wells, R Wenaus, T Westfall, GD Whitten, C Wieman, H Willson, R Wissink, SW Witt, R Xu, N Xu, Z Yakutin, AE Yamamoto, E Yang, J Yepes, P Yokosawa, A Yurevich, VI Zanevski, YV Zborovsky, I Zhang, WM Zoulkarneev, R Zubarev, AN AF Adler, C Ahammed, Z Allgower, C Amonett, J Anderson, BD Anderson, M Averichev, GS Balewski, J Barannikova, O Barnby, LS Baudot, J Bekele, S Belaga, VV Bellwied, R Berger, J Bichsel, H Bland, LC Blyth, CO Bonner, BE Bossingham, R Boucham, A Brandin, A Cadman, RV Caines, H Sanchez, MCD Cardenas, A Carroll, J Castillo, J Castro, M Cebra, D Chattopadhyay, S Chen, ML Chen, Y Chernenko, SP Cherney, M Chikanian, A Choi, B Christie, W Coffin, JP Conin, L Cormier, TM Cramer, JG Crawford, HJ DeMello, M Deng, WS Derevschikov, AA Didenko, L Draper, JE Dunin, VB Dunlop, JC Eckardt, V Efimov, LG Emelianov, V Engelage, J Eppley, G Erazmus, B Fachini, P Faine, V Finch, E Fisyak, Y Flierl, D Foley, KJ Fu, J Gagunashvili, N Gans, J Gaudichet, L Germain, M Geurts, F Ghazikhanian, V Grabski, J Grachov, O Greiner, D Grigoriev, V Guedon, M Gushin, E Hallman, TJ Hardtke, D Harris, JW Heffner, M Heppelmann, S Herston, T Hippolyte, B Hirsch, A Hjort, E Hoffmann, GW Horsley, M Huang, HZ Humanic, TJ Hummler, H Igo, G Ishihara, A Ivanshin, YI Jacobs, P Jacobs, WW Janik, M Johnson, I Jones, PG Judd, E Kaneta, M Kaplan, M Keane, D Kisiel, A Klay, J Klein, SR Klyachko, A Konstantinov, AS Kotchenda, L Kovalenko, AD Kramer, M Kravtsov, P Krueger, K Kuhn, C Kulikov, AI Kunde, GJ Kunz, CL Kutuev, RK Kuznetsov, AA Lakehal-Ayat, L Lamas-Valverde, J Lamont, MAC Landgraf, JM Lange, S Lansdell, CP Lasiuk, B Laue, F Lebedev, A LeCompte, T Lednicky, R Leontiev, VM LeVine, MJ Li, Q Li, Q Lindenbaum, SJ Lisa, MA Ljubicic, T Llope, WJ LoCurto, G Long, H Longacre, RS Lopez-Noriega, M Love, WA Lynn, D Majka, R Margetis, S Martin, L Marx, J Matis, HS Matulenko, YA McShane, TS Meissner, F Melnick, Y Meschanin, A Messer, M Miller, ML Milosevich, Z Minaev, NG Mitchell, J Moiseenko, VA Moltz, D Moore, CF Morozov, V de Moura, MM Munhoz, MG Mutchler, GS Nelson, JM Nevski, P Nikitin, VA Nogach, LV Norman, B Nurushev, SB Odyniec, G Ogawa, A Okorokov, V Oldenburg, M Olson, D Paic, G Pandey, SU Panebratsev, Y Panitkin, SY Pavlinov, AI Pawlak, T Perevoztchikov, V Peryt, W Petrov, VA Pinganaud, W Platner, E Pluta, J Porile, N Porter, J Poskanzer, AM Potrebenikova, E Prindle, D Pruneau, C Radomski, S Rai, G Ravel, O Ray, RL Razin, SV Reichhold, D Reid, JG Retiere, F Ridiger, A Ritter, HG Roberts, JB Rogachevski, OV Romero, JL Roy, C Russ, D Rykov, V Sakrejda, I Sandweiss, J Saulys, AC Savin, I Schambach, J Scharenberg, RP Schweda, K Schmitz, N Schroeder, LS Schuttauf, A Seger, J Seliverstov, D Seyboth, P Shahaliev, E Shestermanov, KE Shimanskii, SS Shvetcov, VS Skoro, G Smirnov, N Snellings, R Sowinski, J Spinka, HM Srivastava, B Stephenson, EJ Stock, R Stolpovsky, A Strikhanov, M Stringfellow, B Stroebele, H Struck, C Suaide, AAP Sugarbaker, E Suire, C Sumbera, M Symons, TJM de Toledo, AS Szarwas, P Takahashi, J Tang, AH Thomas, JH Tikhomirov, V Trainor, TA Trentalange, S Tokarev, M Tonjes, MB Trofimov, V Tsai, O Turner, K Ullrich, T Underwood, DG Van Buren, G VanderMolen, AM Vanyashin, A Vasilevski, IM Vasiliev, AN Vigdor, SE Voloshin, SA Wang, F Ward, H Watson, JW Wells, R Wenaus, T Westfall, GD Whitten, C Wieman, H Willson, R Wissink, SW Witt, R Xu, N Xu, Z Yakutin, AE Yamamoto, E Yang, J Yepes, P Yokosawa, A Yurevich, VI Zanevski, YV Zborovsky, I Zhang, WM Zoulkarneev, R Zubarev, AN CA STAR Collaboration TI Pion interferometry of root s(NN)=130 GeV Au+Au collisions at RHIC SO PHYSICAL REVIEW LETTERS LA English DT Article ID HEAVY-ION COLLISIONS; RELATIVISTIC NUCLEAR COLLISIONS; BOSE-EINSTEIN CORRELATIONS; 2-PION CORRELATIONS; STAR TPC; PB+PB COLLISIONS; PB COLLISIONS; AGS; HYDRODYNAMICS; PLASMA AB Two-pion correlation functions in An + Au collisions at roots(NN) = 130 GeV have been measured by the STAR (solenoidal tracker at RHIC) detector. The source size extracted by fitting the correlations grows with event multiplicity and decreases with transverse momentum. Anomalously large sizes or emission durations, which have been suggested as signals of quark-gluon plasma formation and rehadronization, are not observed. The Hanbury Brown-Twiss parameters display a weak energy dependence over a broad range in roots(NN). C1 Univ Frankfurt, D-6000 Frankfurt, Germany. Argonne Natl Lab, Argonne, IL 60439 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. Univ Birmingham, Birmingham, W Midlands, England. Univ Calif Berkeley, Berkeley, CA 94720 USA. Univ Calif Davis, Davis, CA 95616 USA. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Creighton Univ, Omaha, NE 68178 USA. Joint Inst Nucl Res Dubna, Lab High Energy, Dubna, Russia. Joint Inst Nucl Res Dubna, Particle Phys Lab, Dubna, Russia. Indiana Univ, Bloomington, IN 47408 USA. Inst Rech Subatom, Strasbourg, France. Kent State Univ, Kent, OH 44242 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany. Michigan State Univ, E Lansing, MI 48824 USA. Moscow Phys Engn Inst, Moscow, Russia. CUNY City Coll, New York, NY 10031 USA. Ohio State Univ, Columbus, OH 43210 USA. Penn State Univ, University Pk, PA 16802 USA. Inst High Energy Phys, Protvino, Russia. Purdue Univ, W Lafayette, IN 47907 USA. Rice Univ, Houston, TX 77251 USA. Univ Sao Paulo, Sao Paulo, Brazil. SUBATECH, Nantes, France. Univ Texas, Austin, TX 78712 USA. Warsaw Univ Technol, Warsaw, Poland. Univ Washington, Seattle, WA 98195 USA. Wayne State Univ, Detroit, MI 48201 USA. Yale Univ, New Haven, CT 06520 USA. RP Adler, C (reprint author), Univ Frankfurt, D-6000 Frankfurt, Germany. RI Skoro, Goran/F-3642-2010; Skoro, Goran/P-1229-2014; Barnby, Lee/G-2135-2010; Takahashi, Jun/B-2946-2012; Chen, Yu/E-3788-2012; Witt, Richard/H-3560-2012; Castillo Castellanos, Javier/G-8915-2013; Vanyashin, Aleksandr/H-7796-2013; Voloshin, Sergei/I-4122-2013; Johnson, Ian/I-2439-2013; Lednicky, Richard/K-4164-2013; Zborovsky, Imrich/G-7964-2014; Sumbera, Michal/O-7497-2014; Strikhanov, Mikhail/P-7393-2014; Kisiel, Adam/O-8754-2015; Tikhomirov, Vladimir/M-6194-2015; Suaide, Alexandre/L-6239-2016 OI Skoro, Goran/0000-0001-7745-9045; Barnby, Lee/0000-0001-7357-9904; Takahashi, Jun/0000-0002-4091-1779; Castillo Castellanos, Javier/0000-0002-5187-2779; Vanyashin, Aleksandr/0000-0002-0367-5666; Sumbera, Michal/0000-0002-0639-7323; Strikhanov, Mikhail/0000-0003-2586-0405; Kisiel, Adam/0000-0001-8322-9510; Tikhomirov, Vladimir/0000-0002-9634-0581; Suaide, Alexandre/0000-0003-2847-6556 NR 35 TC 47 Z9 47 U1 0 U2 4 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 AUG 20 PY 2001 VL 87 IS 8 AR 082301 DI 10.1103/PhysRevLett.87.082301 PG 6 WC Physics, Multidisciplinary SC Physics GA 465MJ UT WOS:000170592500010 ER PT J AU Edwards, MJ MacKinnon, AJ Zweiback, J Shigemori, K Ryutov, D Rubenchik, AM Keilty, KA Liang, E Remington, BA Ditmire, T AF Edwards, MJ MacKinnon, AJ Zweiback, J Shigemori, K Ryutov, D Rubenchik, AM Keilty, KA Liang, E Remington, BA Ditmire, T TI Investigation of ultrafast laser-driven radiative blast waves SO PHYSICAL REVIEW LETTERS LA English DT Article ID ATOMIC CLUSTERS; SHOCK; INSTABILITIES; HYDRODYNAMICS AB We have examined the evolution of cylindrically symmetric blast waves produced by the deposition of femtosecond laser pulses in gas jets. In high-Z gases radiative effects become important. We observe the production of an ionization precursor ahead of the shock front and deceleration parameters below the adiabatic value of 1/2 (for a cylinder), an effect expected when the blast wave loses energy by radiative cooling. Despite significant radiative cooling, the blast waves do not appear to develop thin shell instabilities expected for strongly radiative waves. This is believed to be due to the stabilizing effect of a relatively thick blast wave shell resulting in part from electron thermal conduction effects. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Osaka Univ, Inst Laser Engn, Osaka 5650871, Japan. Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. Rice Univ, Dept Space Phys & Astron, Houston, TX 77005 USA. RP Ditmire, T (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RI MacKinnon, Andrew/P-7239-2014 OI MacKinnon, Andrew/0000-0002-4380-2906 NR 17 TC 66 Z9 67 U1 0 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 AUG 20 PY 2001 VL 87 IS 8 AR 085004 DI 10.1103/PhysRevLett.87.085004 PG 4 WC Physics, Multidisciplinary SC Physics GA 465MJ UT WOS:000170592500024 PM 11497951 ER PT J AU Ismail-Beigi, S Chang, EK Louie, SG AF Ismail-Beigi, S Chang, EK Louie, SG TI Coupling of nonlocal potentials to electromagnetic fields SO PHYSICAL REVIEW LETTERS LA English DT Article ID OPTICAL-PROPERTIES; 2ND-HARMONIC GENERATION; DIELECTRIC RESPONSE; SEMICONDUCTORS; SILICON; SUSCEPTIBILITY; GERMANIUM AB Nonlocal Hamiltonians are used widely in first-principles quantum calculations; the nonlocality stems from eliminating undesired degrees of freedom, e.g., core electrons. To date, attempts to couple nonlocal systems to external electromagnetic (EM) fields have been heuristic or limited to weak or long wavelength fields. Using Feynman path integrals, we derive an exact, closed-form coupling of arbitrary EM fields to nonlocal systems. Our results justify and clarify the couplings used to date and are essential for systematic computation of linear and especially nonlinear responses. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Ismail-Beigi, S (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. RI Ismail-Beigi, Sohrab/F-2382-2014 OI Ismail-Beigi, Sohrab/0000-0002-7331-9624 NR 28 TC 26 Z9 26 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 AUG 20 PY 2001 VL 87 IS 8 AR 087402 DI 10.1103/PhysRevLett.87.087402 PG 4 WC Physics, Multidisciplinary SC Physics GA 465MJ UT WOS:000170592500055 PM 11497982 ER PT J AU Neil, GR Benson, SV Biallas, G Gubeli, J Jordan, K Myers, S Shinn, MD AF Neil, GR Benson, SV Biallas, G Gubeli, J Jordan, K Myers, S Shinn, MD TI Second harmonic FEL oscillation SO PHYSICAL REVIEW LETTERS LA English DT Article ID FREE-ELECTRON-LASER; SPECTRUM; ENERGY AB We have produced and measured for the first time second harmonic oscillation in the infrared region by a free electron laser. Although such lasing is ideally forbidden, since the gain of a plane wave is zero on axis for an electron beam perfectly aligned with a wiggler, a transverse mode antisymmetry allows sufficient gain in this experiment for lasing to occur. We lased at pulse rates up to 74.85 MHz and could produce over 4.5 W average and 40 kW peak of IR power in a 40 mn FWHM bandwidth at 2925 nm. In agreement with predictions, the source preferentially lased in a TEM01 mode. C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Neil, GR (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. NR 15 TC 1 Z9 1 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 AUG 20 PY 2001 VL 87 IS 8 AR 084801 DI 10.1103/PhysRevLett.87.084801 PG 4 WC Physics, Multidisciplinary SC Physics GA 465MJ UT WOS:000170592500020 ER PT J AU Policastro, G Son, DT Starinets, AO AF Policastro, G Son, DT Starinets, AO TI Shear viscosity of strongly coupled N=4 supersymmetric Yang-Mills plasma SO PHYSICAL REVIEW LETTERS LA English DT Article ID TRANSPORT-COEFFICIENTS; STRING THEORY; FIELD-THEORY; ABSORPTION; BRANES; THERMODYNAMICS; 3-BRANES AB Using the anti-de Sitter/conformal field theory correspondence, we relate the shear viscosity eta of the finite-temperature N = 4 supersymmetric Yang-Mills theory in the large N, strong-coupling regime with the absorption cross section of low-energy gravitons by a near-extremal black three-brane. We show that in the limit of zero frequency this cross section coincides with the area of the horizon. From this result we find eta = pi /8N(2)T(3). We conjecture that for finite 't Hooft coupling g(YM)(2)N the shear viscosity is eta = f(g(YM)(2)N)(NT3)-T-2, where f(x) is a monotonic function that decreases from O(x(-2) ln(-1) (1/x)) at small x to pi /8 when x --> infinity. C1 NYU, Dept Phys, New York, NY 10003 USA. Scuola Normale Super Pisa, I-56100 Pisa, Italy. Columbia Univ, Dept Phys, New York, NY 10027 USA. Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA. RP Policastro, G (reprint author), NYU, Dept Phys, 4 Washington Pl, New York, NY 10003 USA. NR 26 TC 942 Z9 946 U1 0 U2 13 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 AUG 20 PY 2001 VL 87 IS 8 AR 081601 DI 10.1103/PhysRevLett.87.081601 PG 4 WC Physics, Multidisciplinary SC Physics GA 465MJ UT WOS:000170592500006 PM 11497933 ER PT J AU Wang, MHLS Berisso, MC Christian, DC Felix, J Gara, A Gottschalk, E Gutierrez, G Hartouni, EP Knapp, BC Kreisler, MN Lee, S Markianos, K Moreno, G Reyes, MA Sosa, M Wehmann, A Wesson, D AF Wang, MHLS Berisso, MC Christian, DC Felix, J Gara, A Gottschalk, E Gutierrez, G Hartouni, EP Knapp, BC Kreisler, MN Lee, S Markianos, K Moreno, G Reyes, MA Sosa, M Wehmann, A Wesson, D TI Diffractively produced charm final states in 800-GeV/c pp collisions SO PHYSICAL REVIEW LETTERS LA English DT Article ID MESON PRODUCTION; INTRINSIC CHARM; PROTON; PHYSICS AB We report the first observation of diffractively produced open charm in 800-GeV/c pp collisions of the type pp --> pD*X. We measure cross sections of sigma (diff)(D*+) = (0.185 +/- 0.044 +/- 0.054) mub and sigma (diff)(D*-) = (0.174 +/- 0.034 +/- 0.029) mub. Our measurements are based on 4.3 X 10(9) events recorded by FNAL E690 in the fixed-target run of 1991. We compare our results with previous fixed-target charm experiments. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Massachusetts, Amherst, MA 01003 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Guanajuato, Leon, Guanajuato, Mexico. Columbia Univ, Nevis Lab, Irvington, NY 10533 USA. Univ Michoacana, Morelia, Michoacan, Mexico. RP Wang, MHLS (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 25 TC 9 Z9 9 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 20 PY 2001 VL 87 IS 8 AR 082002 DI 10.1103/PhysRevLett.87.082002 PG 4 WC Physics, Multidisciplinary SC Physics GA 465MJ UT WOS:000170592500009 PM 11497936 ER PT J AU Zhu, H Ahmidouch, A Anklin, H Arenhovel, H Armstrong, C Bernet, C Boeglin, W Breuer, H Brindza, P Brown, D Bultmann, S Carlini, R Chant, N Cowley, A Crabb, D Danagoulian, S Day, DB Eden, T Ent, R Farah, Y Fatemi, R Garrow, K Harris, C Hauger, M Honegger, A Jourdan, J Kaufmann, M Khandaker, M Kubon, G Lichtenstadt, J Lindgren, R Lourie, R Lung, A Mack, D Malik, S Markowitz, P McFarlane, K McKee, P McNulty, D Milanovich, G Mitchell, J Mkrtchyan, H Muhlbauer, M Petitjean, T Prok, Y Rohe, D Rollinde, E Rondon, OA Roos, P Sawafta, R Sick, I Smith, C Southern, T Steinacher, M Stepanyan, S Tadevosyan, V Tieulent, R Tobias, A Vulcan, W Warren, G Wohrle, H Wood, S Yan, C Zeier, M Zhao, J Zihlmann, B AF Zhu, H Ahmidouch, A Anklin, H Arenhovel, H Armstrong, C Bernet, C Boeglin, W Breuer, H Brindza, P Brown, D Bultmann, S Carlini, R Chant, N Cowley, A Crabb, D Danagoulian, S Day, DB Eden, T Ent, R Farah, Y Fatemi, R Garrow, K Harris, C Hauger, M Honegger, A Jourdan, J Kaufmann, M Khandaker, M Kubon, G Lichtenstadt, J Lindgren, R Lourie, R Lung, A Mack, D Malik, S Markowitz, P McFarlane, K McKee, P McNulty, D Milanovich, G Mitchell, J Mkrtchyan, H Muhlbauer, M Petitjean, T Prok, Y Rohe, D Rollinde, E Rondon, OA Roos, P Sawafta, R Sick, I Smith, C Southern, T Steinacher, M Stepanyan, S Tadevosyan, V Tieulent, R Tobias, A Vulcan, W Warren, G Wohrle, H Wood, S Yan, C Zeier, M Zhao, J Zihlmann, B TI Measurement of the electric form factor of the neutron through (d)over-right-arrow((e)over-right-arrow, e ' n)p at Q(2)=0.5 (GeV/c)(2) SO PHYSICAL REVIEW LETTERS LA English DT Article ID POLARIZED TARGET; SCATTERING; NUCLEON AB We report the first measurement using a solid polarized target of the neutron electric form factor G(E)(n) via (d) over right arrow((e) over right arrow, e' n)p. G(E)(n) was determined from the beam-target asymmetry in the scattering of longitudinally polarized electrons from polarized deuterated ammonia ((ND3)-N-15). The measurement was performed in Hall C at Thomas Jefferson National Accelerator Facility in quasifree kinematics with the target polarization perpendicular to the momentum transfer. The electrons were detected in a magnetic spectrometer in coincidence with neutrons in a large solid angle segmented detector. We find G(E)(n) = 0.04632 +/- 0.00616(stat) +/- 0.00341(syst) at Q(2) = 0.495 (GeV/c)(2). C1 Univ Virginia, Inst Nucl & Particle Phys, Charlottesville, VA 22903 USA. N Carolina Agr & Tech State Univ, Greensboro, NC 27411 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Florida Int Univ, Miami, FL 33199 USA. Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany. Univ Basel, CH-4056 Basel, Switzerland. Univ Maryland, College Pk, MD 20742 USA. Norfolk State Univ, Norfolk, VA 23504 USA. Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel. SUNY Stony Brook, Stony Brook, NY 11794 USA. Yerevan Phys Inst, Yerevan 375036, Armenia. Univ Stellenbosch, Dept Phys, ZA-7602 Matieland, South Africa. RP Zhu, H (reprint author), Univ Virginia, Inst Nucl & Particle Phys, Charlottesville, VA 22903 USA. RI Rondon Aramayo, Oscar/B-5880-2013; Day, Donal/C-5020-2015 OI Day, Donal/0000-0001-7126-8934 NR 31 TC 137 Z9 137 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 AUG 20 PY 2001 VL 87 IS 8 AR 081801 DI 10.1103/PhysRevLett.87.081801 PG 4 WC Physics, Multidisciplinary SC Physics GA 465MJ UT WOS:000170592500007 PM 11497934 ER PT J AU Kolesnichenko, YI Lutsenko, VV White, RB Yakovenko, YV AF Kolesnichenko, YI Lutsenko, VV White, RB Yakovenko, YV TI Transport of energetic ions during relaxation oscillations in plasmas of spherical tori SO PHYSICS LETTERS A LA English DT Article DE spherical tori; diamagnetism; reconnection events; energetic ions ID SAWTOOTH OSCILLATIONS; PARTICLE; TOKAMAK; MODE AB It is shown that high ( is the ratio of plasma pressure to the magnetic field pressure) may deteriorate the confinement of trapped energetic ions in spherical tori during MHD reconnection. events. This result indicates that moderate rather than very high may be preferable in STs. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Sci Ctr Inst Nucl Res, UA-03680 Kiev, Ukraine. RP White, RB (reprint author), Princeton Univ, Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. RI White, Roscoe/D-1773-2013; OI White, Roscoe/0000-0002-4239-2685; Yakovenko, Yuriy/0000-0002-3499-5275 NR 18 TC 6 Z9 6 U1 0 U2 3 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 20 PY 2001 VL 287 IS 1-2 BP 131 EP 136 DI 10.1016/S0375-9601(01)00432-7 PG 6 WC Physics, Multidisciplinary SC Physics GA 468NB UT WOS:000170762800022 ER PT J AU Rajh, T Poluektov, O Dubinski, AA Wiederrecht, G Thurnauer, MC Trifunac, AD AF Rajh, T Poluektov, O Dubinski, AA Wiederrecht, G Thurnauer, MC Trifunac, AD TI Spin polarization mechanisms in early stages of photoinduced charge separation in surface-modified TiO2 nanoparticles SO CHEMICAL PHYSICS LETTERS LA English DT Article ID RADICAL PAIRS; RHODOBACTER-SPHAEROIDES; NANOCRYSTALLINE TIO2; ELECTRON; RESONANCE; COLLOIDS; DYNAMICS; EPR; ABSORPTION; REDUCTION AB Steady-state and time-resolved electron paramagnetic resonance (EPR) experiments reveal that photoinduced charge separation in surface-modified nanoparticles yields interacting electron-hole radical pairs with spectral features indicative of a range of dynamic properties (Radical Pair Model and emissive Triplet Model CIDEP). Fast exchange in the radical pair is indicated by the presence of a central line at the midpoint, (g(ave) = (g(h) + g(e))/2), of electron and hole g-factors. Excess emission is consistent with the triplet character of the exciton precursor. A subset of electron-hole radical pairs exhibits the spin feature characteristic of correlated radical pair polarization (CRPP) reflecting a weak interaction between photogenerated holes and electrons. (C) 2001 Published by Elsevier Science B.V. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. Russian Acad Sci, Inst Chem Phys, Moscow 117977, Russia. RP Rajh, T (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 35 TC 44 Z9 44 U1 2 U2 19 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD AUG 17 PY 2001 VL 344 IS 1-2 BP 31 EP 39 DI 10.1016/S0009-2614(01)00733-3 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 465ZE UT WOS:000170619200006 ER PT J AU Deutsch, PW Curtiss, LA Blaudeau, JP AF Deutsch, PW Curtiss, LA Blaudeau, JP TI Electron affinities of germanium anion clusters, Ge-n(-) (n=2-5) SO CHEMICAL PHYSICS LETTERS LA English DT Article ID KINETIC-ENERGY SPECTROSCOPY; SMALL SILICON CLUSTERS; PHOTOELECTRON-SPECTROSCOPY; GE-N; GAUSSIAN-2 THEORY; SEMICONDUCTOR CLUSTERS; BINDING-ENERGIES; GA-KR; GEOMETRIES; STATES AB Gaussian-2 (G2) theory for third-row non-transition elements is used to calculate accurate electron affinities of germanium clusters, Ge-n (n = 2-5). The results for n = 2-4 are in agreement with experiment while there is some disagreement for Ge-5, The electron affinities are also calculated using G2 theory modified by adding a diffuse function to the basis set for MP2 geometry optimizations and using the B3LYP density functional method with the 6-311 +G(3df,2p) basis set. (C) 2001 Published by Elsevier Science B.V. C1 Penn State Univ, Dept Phys, Monaca, PA 15061 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Ohio Supercomp Ctr, Wright Patterson AFB, OH 45433 USA. RP Deutsch, PW (reprint author), Penn State Univ, Dept Phys, Monaca, PA 15061 USA. NR 29 TC 11 Z9 11 U1 1 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD AUG 17 PY 2001 VL 344 IS 1-2 BP 101 EP 106 DI 10.1016/S0009-2614(01)00734-5 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 465ZE UT WOS:000170619200016 ER PT J AU Muller, A Luban, M Schroder, C Modler, R Kogerler, P Axenovich, M Schnack, J Canfield, PC Bud'ko, S Harrison, N AF Muller, A Luban, M Schroder, C Modler, R Kogerler, P Axenovich, M Schnack, J Canfield, PC Bud'ko, S Harrison, N TI Classical and quantum magnetism in giant keplerate magnetic molecules SO CHEMPHYSCHEM LA English DT Editorial Material DE cage compounds; cluster compounds; magnetic properties; polyoxometalates; topology ID HEISENBERG-MODEL; CLUSTERS; SPIN; TEMPERATURE; DYNAMICS; CRYSTAL; CENTERS; SPHERES; UNITS AB What might be effective for understanding the magnetism of emerging mesoscopic magnetic molecules? Three theoretical modelling methods successfully explain the experimental data on the largest paramagnet synthesized to date, the nano-sized Keplerate {Mo-VI(72) Fe-III(30)}. Surprisingly, this molecule follows the classical Heisenberg model even down to as low as 50 mK and its 30 spins exhibit highly symmetric order at low temperatures. Nearest-neighbor spin vectors (see picture) are canted by an external magnetic field while their projections maintain a frustration angle of 120 degrees. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. Univ Bielefeld, Lehrstuhl Anorgan Chem 1, D-33501 Bielefeld, Germany. Telelog GMBH, D-33602 Bielefeld, Germany. Iowa State Univ, Dept Math, Ames, IA 50011 USA. Univ Osnabruck, Fachbereich Phys, D-49069 Osnabruck, Germany. Natl High Magnet Field Lab, Los Alamos, NM 87505 USA. RP Iowa State Univ, Ames Lab, Ames, IA 50011 USA. EM luban@ameslab.gov RI Schnack, Jurgen/A-4079-2008; Canfield, Paul/H-2698-2014; Kogerler, Paul/H-5866-2013; OI Schnack, Jurgen/0000-0003-0702-2723; Kogerler, Paul/0000-0001-7831-3953; Muller, Achim/0000-0003-0117-4021 NR 30 TC 151 Z9 151 U1 1 U2 23 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA POSTFACH 101161, 69451 WEINHEIM, GERMANY SN 1439-4235 EI 1439-7641 J9 CHEMPHYSCHEM JI ChemPhysChem PD AUG 17 PY 2001 VL 2 IS 8-9 BP 517 EP + DI 10.1002/1439-7641(20010917)2:8/9<517::AID-CPHC517>3.0.CO;2-1 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 467QB UT WOS:000170714300005 PM 23686989 ER PT J AU Hsu, LS Chen, GD Lee, LS Chi, CW Cheng, JF Chen, JY AF Hsu, LS Chen, GD Lee, LS Chi, CW Cheng, JF Chen, JY TI Human Ca2+/calmodulin-dependent protein kinase kinase beta gene encodes multiple isoforms that display distinct kinase activity SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID ADULT-RAT BRAIN; MOLECULAR-CLONING; 2 ISOFORMS; MESSENGER-RNAS; CALMODULIN; ACTIVATION; CASCADE; EXPRESSION; CALCIUM; LOCALIZATION AB Ca+2/calmodulin-dependent protein kinases (CaMKs) are activated upon binding of Ca+2/calmodulin. To gain maximal activity, CaMK I and CaMK TV can be further phosphorylated by an upstream kinase, CaMK kinase (CaMKK). We previously isolated cDNA clones encoding human CaMKK beta isoforms that are heterogeneous in their 3 ' -sequences (Hsu, L.-S., Tsou, A.-P., Chi, C.-W,, Lee, C.-H., and Chen, J.-Y. (1998) J. Biomed. Sci. 5,141-149). In the present study, we examined the genomic organization and transcription of the human CaMKK beta gene. The human CaMKK beta locus spans more than 40 kilobase pairs and maps to chromosome 12q24.2. It is organized into 18 exons and 17 introns that are flanked by typical splice donor and acceptor sequences. Two major species of transcripts, namely the beta1 (5.6 kilobase pairs) and beta2 (2.9 kilobase pairs), are generated through differential usage of polyadenylation sites located in the last and penultimate exons. Additional forms of CaMKK beta transcripts were also identified that resulted from alternative splicing of the internal exons 14 and/or 16. These isoforms display differential expression patterns in human tissues and tumor-derived cell lines. They also exhibit a distinct ability to undergo autophosphorylation and to phosphorylate the downstream kinases CaMK I and CaMK IV. The differential expression of CaMKK beta isoforms with distinct activity further suggests the complexity of the regulation of the CaMKK/CaMK cascade and an important role for CaMKK in the action of Ca+2- mediated cellular responses. C1 Acad Sinica, Inst Biomed Sci, Taipei, Taiwan. Natl Def Med Ctr, Grad Inst Life Sci, Taipei, Taiwan. Inst Neurol, Taipei, Taiwan. Vet Gen Hosp, Med Res & Educ Dept, Taipei, Taiwan. Natl Yang Ming Univ, Taipei 112, Taiwan. Lawrence Berkeley Lab, Genome Sci Dept, Berkeley, CA 94720 USA. RP Chen, JY (reprint author), Acad Sinica, Inst Biomed Sci, Taipei, Taiwan. NR 47 TC 21 Z9 24 U1 0 U2 2 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 USA SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD AUG 17 PY 2001 VL 276 IS 33 BP 31113 EP 31123 DI 10.1074/jbc.M011720200 PG 11 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 463JG UT WOS:000170472900070 PM 11395482 ER PT J AU Yamakov, V Wolf, D Salazar, M Phillpot, SR Gleiter, H AF Yamakov, V Wolf, D Salazar, M Phillpot, SR Gleiter, H TI Length-scale effects in the nucleation of extended dislocations in nanocrystalline Al by molecular-dynamics simulation SO ACTA MATERIALIA LA English DT Article DE computer simulation; nanocrystal; aluminium; dislocations; grain boundaries ID AMORPHOUS INTERGRANULAR FILMS; MECHANICAL-PROPERTIES; COVALENT MATERIALS; GRAIN-BOUNDARIES; POTENTIALS; STABILITY; DIFFUSION; BEHAVIOR; FLOW; SIZE AB The nucleation of extended dislocations from the grain boundaries in nanocrystalline aluminum is studied by molecular-dynamics simulation. The length of the stacking fault connecting the two Shockley partials that form the extended dislocation, i.e., the dislocation splitting distance, r(split) depends not only on the stacking-fault energy but also on the resolved nucleation stress. Our simulations for columnar grain microstructures with a grain diameter, d, of up to 70 nm reveal that the magnitude of r(split) relative to d represents a critical length scale controlling the low-temperature mechanical behavior of nanocrystalline materials. For r(split)>d, the first partials nucleated from the boundaries glide across the grains and become incorporated into the boundaries on the opposite side, leaving behind a grain transected by a stacking fault. By contrast, for r(split) Ce4+; Zr-0 --> Zr2+). The NO, species desorbed from the oxides at temperatures ranging from 400 to 800 K, leaving N adatoms on the surfaces. The effects of Zr on the electronic and chemical properties of ceria are discussed and compared to those of other common dopant agents (Ca, Ti, and Cu). C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. RP Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. EM Rodrigez@bnl.gov RI Hrbek, Jan/I-1020-2013; OI Peden, Charles/0000-0001-6754-9928 NR 80 TC 95 Z9 96 U1 4 U2 56 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 AUG 16 PY 2001 VL 105 IS 32 BP 7762 EP 7770 DI 10.1021/jp011224m PG 9 WC Chemistry, Physical SC Chemistry GA 463TU UT WOS:000170494000022 ER PT J AU Zurek, WH AF Zurek, WH TI Sub-Planck structure in phase space and its relevance for quantum decoherence SO NATURE LA English DT Article ID CHAOS; EVOLUTION AB Heisenberg's principle(1) states that the product of uncertainties of position and momentum should be no less than the limit set by Planck's constant, (h) over bar /2. This is usually taken to imply that phase space structures associated with sub-Planck scales (<< (h) over bar) do not exist, or at least that they do not matter. Here I show that this common assumption is false: non-local quantum superpositions (or 'Schrodinger's cat' states) that are confined to a phase space volume characterized by the classical action A, much larger than (h) over bar, develop spotty structure on the sub-Planck scale, a = (h) over bar (2)/A. Structure saturates on this scale particularly quickly in quantum versions of classically chaotic systems-such as gases that are modelled by chaotic scattering of molecules-because their exponential sensitivity to perturbations(2) causes them to be driven into non-local 'cat' states. Most importantly, these sub-Planck scales are physically significant: a determines the sensitivity of a quantum system or environment to perturbations. Therefore, this scale controls the effectiveness of decoherence and the selection of preferred pointer states by the environment(3-8). It will also be relevant in setting limits on the sensitivity of quantum meters. C1 Los Alamos Natl Lab, Div Theory, Los Alamos, NM 87545 USA. RP Zurek, WH (reprint author), Los Alamos Natl Lab, Div Theory, T-6,MS B288, Los Alamos, NM 87545 USA. EM whz@LANL.gov NR 24 TC 156 Z9 157 U1 0 U2 14 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD AUG 16 PY 2001 VL 412 IS 6848 BP 712 EP 717 DI 10.1038/35089017 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 462ZB UT WOS:000170450200038 PM 11507634 ER PT J AU Lee, SJ Song, C AF Lee, SJ Song, C TI The native oxide effects on the optical properties of TbFe2 SO PHYSICA STATUS SOLIDI A-APPLIED RESEARCH LA English DT Article ID FILMS AB The native oxide effects on the optical properties of a polycrystalline TbFe2 were studied using spectroscopic ellipsometry and the grazing-incident X-ray reflectivity technique. The spectra of the dielectric functions for the TbFe2 sample exposed to air at room temperature were measured, as the sample was oxidized. The spectra of the reflectance, optical conductivity, and skin depth were obtained in a 12 h interval. As the thickness of the oxide layer gets larger, the magnitude of the optical conductivity decreases. The thickness of the native oxide layer for the fully oxidized surface was estimated using an X-ray reflectivity measurement. C1 Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Dept Phys & Astron, Ames, IA 50011 USA. RP Lee, SJ (reprint author), Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. NR 13 TC 1 Z9 1 U1 0 U2 1 PU WILEY-V C H VERLAG GMBH PI BERLIN PA PO BOX 10 11 61, D-69451 BERLIN, GERMANY SN 0031-8965 J9 PHYS STATUS SOLIDI A JI Phys. Status Solidi A-Appl. Res. PD AUG 16 PY 2001 VL 186 IS 3 BP 487 EP 492 PG 6 WC Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA 469YW UT WOS:000170844500015 ER PT J AU Frabetti, PL Cheung, HWK Cumalat, JP Dallapiccola, C Ginkel, JF Johns, WE Nehring, MS Vandering, EW Butler, JN Cihangir, S Gaines, I Garbinclus, PH Garren, L Gourlay, SA Harding, DJ Kasper, P Kreymer, A Lebrun, P Shukla, S Vittone, M Baldini-Ferroli, R Bianco, S Fabbri, FL Sarwar, S Zallo, A Cawlfield, C Culbertson, R Gardner, RW Gottschalk, E Greene, R Park, K Rahimi, A Wiss, J Alimonti, G Bellini, G Boschini, M Brambilla, D Caccianiga, B Cinquini, L DiCorato, M Dini, P Giammarchi, M Inzani, P Leveraro, F Malvezzi, S Menasce, D Meroni, E Milazzo, L Moroni, L Pedrini, D Perasso, L Prelz, F Sala, A Sala, S Toretta, D Buchholz, D Claes, D Gobbi, B O'Reilly, B Bishop, JM Cason, NM Kennedy, CJ Kim, GN Lin, TF Puseljic, DL Ruchti, RC Shephard, WD Swiatek, JA Wu, ZY Arena, V Boca, G Bonomi, G Castoldi, C Gianini, G Merlo, M Ratti, SP Riccardi, C Viola, L Vitulo, P Lopez, AM Mendez, L Mirles, A Montiel, E Olaya, D Ramirez, JE Rivera, C Zhang, Y Link, JM Paolone, VS Yager, PM Wilson, JR Cao, J Hosack, M Sheldon, PD Davenport, F Cho, K Danyo, K Handler, T Cheon, BG Chung, YS Kang, JS Kim, KY Lee, KB Myung, SS AF Frabetti, PL Cheung, HWK Cumalat, JP Dallapiccola, C Ginkel, JF Johns, WE Nehring, MS Vandering, EW Butler, JN Cihangir, S Gaines, I Garbinclus, PH Garren, L Gourlay, SA Harding, DJ Kasper, P Kreymer, A Lebrun, P Shukla, S Vittone, M Baldini-Ferroli, R Bianco, S Fabbri, FL Sarwar, S Zallo, A Cawlfield, C Culbertson, R Gardner, RW Gottschalk, E Greene, R Park, K Rahimi, A Wiss, J Alimonti, G Bellini, G Boschini, M Brambilla, D Caccianiga, B Cinquini, L DiCorato, M Dini, P Giammarchi, M Inzani, P Leveraro, F Malvezzi, S Menasce, D Meroni, E Milazzo, L Moroni, L Pedrini, D Perasso, L Prelz, F Sala, A Sala, S Toretta, D Buchholz, D Claes, D Gobbi, B O'Reilly, B Bishop, JM Cason, NM Kennedy, CJ Kim, GN Lin, TF Puseljic, DL Ruchti, RC Shephard, WD Swiatek, JA Wu, ZY Arena, V Boca, G Bonomi, G Castoldi, C Gianini, G Merlo, M Ratti, SP Riccardi, C Viola, L Vitulo, P Lopez, AM Mendez, L Mirles, A Montiel, E Olaya, D Ramirez, JE Rivera, C Zhang, Y Link, JM Paolone, VS Yager, PM Wilson, JR Cao, J Hosack, M Sheldon, PD Davenport, F Cho, K Danyo, K Handler, T Cheon, BG Chung, YS Kang, JS Kim, KY Lee, KB Myung, SS CA E687 Collaboration TI Evidence for a narrow dip structure at 1.9 GeV/c(2) in 3 pi(+)3 pi(-) diffractive photoproduction SO PHYSICS LETTERS B LA English DT Article ID TIME-LIKE REGION; FLUX-TUBE MODEL; THRESHOLD; LATTICE; HYBRID; MESONS AB A narrow dip structure has been observed at 1.9 GeV/c(2) in a study of diffractive photoproduction of the 3 pi (+)3 pi (-) final state performed by the Fermilab experiment E687. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy. Ist Nazl Fis Nucl, I-40126 Bologna, Italy. 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 Illinois, Urbana, IL 61801 USA. Univ Milan, Dipartimento Fis, I-20133 Milan, Italy. Ist Nazl Fis Nucl, I-20133 Milan, Italy. Northwestern Univ, Evanston, IL 60208 USA. Univ Notre Dame, Notre Dame, IN 46556 USA. Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy. Ist Nazl Fis Nucl, I-27100 Pavia, Italy. Univ Puerto Rico, Mayaguez, PR 00681 USA. Univ Calif Davis, Davis, CA 95616 USA. Univ S Carolina, Columbia, SC 29208 USA. Vanderbilt Univ, Nashville, TN 37235 USA. Univ N Carolina, Asheville, NC 28804 USA. Univ Tennessee, Knoxville, TN 37996 USA. Korea Univ, Seoul 136701, South Korea. RP Frabetti, PL (reprint author), Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy. EM adriano.zallo@lnf.infn.it RI Bonomi, Germano/G-4236-2010; Link, Jonathan/L-2560-2013; Menasce, Dario Livio/A-2168-2016; OI Bonomi, Germano/0000-0003-1618-9648; Link, Jonathan/0000-0002-1514-0650; Menasce, Dario Livio/0000-0002-9918-1686; bianco, stefano/0000-0002-8300-4124 NR 24 TC 38 Z9 39 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD AUG 16 PY 2001 VL 514 IS 3-4 BP 240 EP 246 DI 10.1016/S0370-2693(01)00797-3 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 463LH UT WOS:000170477300006 ER PT J AU Hiller, G Schmaltz, M AF Hiller, G Schmaltz, M TI Solving the strong CP problem with supersymmetry SO PHYSICS LETTERS B LA English DT Article ID ELECTRIC-DIPOLE MOMENT; STRONG P; QUANTUM CHROMODYNAMICS; EXTRA DIMENSIONS; VIOLATION; BREAKING; NEUTRON; INVARIANCE; COUPLINGS; LIMIT AB We propose a new solution to the strong CP problem based on supersymmetric non-renormalization theorems. CP is broken spontaneously and it's breaking is communicated to the MSSM by radiative corrections. The strong CP phase is protected by a susy non-renormalization theorem and remains exactly zero while loops can generate a large CKM phase from wave function renormalization. We present a concrete model as an example but stress that our framework is general. We also discuss constraints on susy breaking and point out experimental signatures. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Stanford Univ, SLAC, Stanford, CA 94309 USA. Fermilab Natl Accelerator Lab, Theory Dept, Batavia, IL 60510 USA. RP Stanford Univ, SLAC, Stanford, CA 94309 USA. EM ghiller@slac.stanford.edu; schmaltz@fnal.gov NR 49 TC 26 Z9 26 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD AUG 16 PY 2001 VL 514 IS 3-4 BP 263 EP 268 DI 10.1016/S0370-2693(01)00814-0 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 463LH UT WOS:000170477300009 ER PT J AU Afanasev, AV Akushevich, I Ilyichev, A Merenkov, NP AF Afanasev, AV Akushevich, I Ilyichev, A Merenkov, NP TI QED radiative corrections to asymmetries of elastic ep-scattering in hadronic variables SO PHYSICS LETTERS B LA English DT Article ID POLARIZATION AB Compact analytical formulae for QED radiative corrections in the processes of elastic e-p scattering are obtained in the case when kinematic variables are reconstructed from the recoil proton momentum measured. Numerical analysis is presented under kinematic conditions of current experiments at JLab. (C) 2001 Published by Elsevier Science B.V. C1 N Carolina Cent Univ, Durham, NC 27707 USA. Jefferson Lab, Newport News, VA 23606 USA. Natl Ctr Particle & High Energy Phys, Minsk 220040, Byelarus. NSC Kharkov Inst Phys & Technol 63108, Kharkov, Ukraine. RP Afanasev, AV (reprint author), N Carolina Cent Univ, Durham, NC 27707 USA. OI Afanasev, Andrei/0000-0003-0679-3307 NR 12 TC 24 Z9 24 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 16 PY 2001 VL 514 IS 3-4 BP 269 EP 278 DI 10.1016/S0370-2693(01)00816-4 PG 10 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 463LH UT WOS:000170477300010 ER PT J AU Harnisch, JA Gazda, DB Anderegg, JW Porter, MD AF Harnisch, JA Gazda, DB Anderegg, JW Porter, MD TI Chemical modification of carbonaceous stationary phases by the reduction of diazonium salts SO ANALYTICAL CHEMISTRY LA English DT Article ID MODULATED LIQUID-CHROMATOGRAPHY; POROUS GRAPHITIC CARBON; SELF-ASSEMBLED MONOLAYERS; RADIO-FREQUENCY PLASMAS; ELECTROCHEMICAL REDUCTION; ENANTIOMERIC SEPARATIONS; COVALENT MODIFICATION; SURFACES; SELECTIVITY; ELECTRODES AB This paper describes a new strategy for the creation of chemically modified carbonaceous stationary phases. The strategy exploits the electroreduction of arenediazonium salts as a means for functionalizing the surface of glassy carbon (GC) and porous graphitic carbon (PGC) stationary phases. The one-electron reduction of these salts forms an arene radical which then couples via a carbon-carbon linkage to the carbon framework at the surface of the stationary phase. Two arenediazonium-based modifiers were used in evaluating the potential utility of this strategy: 4-nitrobenzenediazonium tetrafluoroborate for the GC and PGC phases and 4-hexylbenzenediazonium tetrafluoroborate for only the PGC phases. Modifications were carried out by packing the phases into a column used for electrochemically modulated liquid chromatography. The effectiveness of the modifications was assessed by X-ray photoelectron spectroscopy and by comparing the liquid separation of a series of mixtures before and after coating deposition. For the nitrobenzyl-modified GC phase, the test mixture contained both anisole and fluoranthene. The performance of the nitrobenzyl- and hexylbenzyl-modified PGC stationary phases was characterized by the separations of substituted phenols (i.e., nitrophenol and resorcinol) and a few important pharmaceutical agents (i.e., hexobarbital, oxazepam, and nitrazepam). The potential utility of this modification procedure to form stationary phases that are stable upon extended exposure to aggressive mobile phases is discussed and briefly examined. C1 US DOE, Ames Lab, Microanalyt Instrumentat Ctr, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Dept Chem, Ames, IA 50011 USA. RP Porter, MD (reprint author), US DOE, Ames Lab, Microanalyt Instrumentat Ctr, Ames, IA 50011 USA. NR 45 TC 45 Z9 46 U1 0 U2 20 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD AUG 15 PY 2001 VL 73 IS 16 BP 3954 EP 3959 DI 10.1021/ac010398x PG 6 WC Chemistry, Analytical SC Chemistry GA 463NT UT WOS:000170482800024 PM 11534722 ER PT J AU Kane, RS Glink, PT Chapman, RG McDonald, JC Jensen, PK Gao, HY Pasa-Tolic, L Smith, RD Whitesides, GM AF Kane, RS Glink, PT Chapman, RG McDonald, JC Jensen, PK Gao, HY Pasa-Tolic, L Smith, RD Whitesides, GM TI Basicity of the amino groups of the aminoglycoside amikacin using capillary electrophoresis and coupled CE-MS-MS techniques SO ANALYTICAL CHEMISTRY LA English DT Article ID PROTEIN CHARGE LADDERS; ELECTROSTATIC CONTRIBUTIONS; BINDING; SPECTROSCOPY; ANTIBIOTICS AB This paper describes the use of capillary electrophoresis (CE), and coupled CE and mass spectrometric techniques, to measure the values of the pK(a) of the amino groups of the aminoglycoside antibiotic amikacin and of its acetylated derivatives. These values of pK(a) (8.4, 6.7, 9.7, 8.4) were determined by measuring the electrophoretic mobilities of the molecules as a function of pH; they are within 0.7 unit of certain values reported in the literature (by C-13 and (NNMR)-N-15 spectroscopies) but resolved ambiguities left by these earlier studies. The range of values of pKa of amino groups also indicates the complex dependence of the acidity of a functional group (and thus the extent of ionization at a specified value of pH) on the molecular environment of that group. C1 Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. RP Whitesides, GM (reprint author), Harvard Univ, Dept Chem & Chem Biol, 12 Oxford St, Cambridge, MA 02138 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 FU NIGMS NIH HHS [GM 51559] NR 18 TC 26 Z9 28 U1 1 U2 23 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD AUG 15 PY 2001 VL 73 IS 16 BP 4028 EP 4036 DI 10.1021/ac010173m PG 9 WC Chemistry, Analytical SC Chemistry GA 463NT UT WOS:000170482800034 PM 11534732 ER PT J AU McKnight, TE Culbertson, CT Jacobson, SC Ramsey, JM AF McKnight, TE Culbertson, CT Jacobson, SC Ramsey, JM TI Electroosmotically induced hydraulic pumping with integrated electrodes on microfluidic devices SO ANALYTICAL CHEMISTRY LA English DT Article ID MICELLAR ELECTROKINETIC CHROMATOGRAPHY; OPEN-CHANNEL ELECTROCHROMATOGRAPHY; CAPILLARY-ELECTROPHORESIS; GLASS CHIPS; SAMPLE INJECTION; FLUID-FLOW; MICROCHIP; SEPARATIONS; SYSTEMS; DNA AB Electroosmotic manipulation of fluids was demonstrated using thin metal electrodes integrated within microfluidic channels at the substrate and cover plate interface. Devices were fabricated by photolithographically patterning electrodes on glass cover plates that were then bonded to polymeric substrates into which the channels were cast. Polymeric substrates were used to provide a permeable membrane for the transport and removal of gaseous electrolysis products generated at the electrodes. Electroosmotic flow between interdigitated electrodes was demonstrated and provided electric field-free pumping of fluids in sections of the channel outside of the electrode pairs. The resultant pumping velocities were shown to be dependent on the applied voltage, not on the applied field strength, and independent of the length of the electroosmotically pumped region. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP McKnight, TE (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. RI McKnight, Tim/H-3087-2011; OI McKnight, Tim/0000-0003-4326-9117; Culbertson, Christopher/0000-0002-6833-3237 FU NCRR NIH HHS [RR14551-02] NR 38 TC 98 Z9 104 U1 3 U2 30 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD AUG 15 PY 2001 VL 73 IS 16 BP 4045 EP 4049 DI 10.1021/ac010048a PG 5 WC Chemistry, Analytical SC Chemistry GA 463NT UT WOS:000170482800036 PM 11534734 ER PT J AU Barrett, CL Mortveit, HS Reidys, CM AF Barrett, CL Mortveit, HS Reidys, CM TI Elements of a theory of simulation III: equivalence of SDS SO APPLIED MATHEMATICS AND COMPUTATION LA English DT Article DE sequential dynamical systems; equivalence; fixed points; orbits ID RANDOM GRAPHS AB In the development of mathematical foundations for a theory of simulation, a certain class of discrete sequential dynamical systems (SDS) is of particular importance. These systems which we refer to as SDS consist of: (a) a graph Y with vertex set {1,2,..., n}, where each vertex has associated a binary state, (b) a vertex labeled set of functions F-i,F-Y : F-2(n) --> F-2(n), and (c) a permutation pi is an element of S-n. The function F-i,F-Y update the state of vertex i as a function of the states of vertex i and its Y-neighbors and leaves all other states invariant. By composing these functions in the order given by pi, we obtain the SDS [F-Y, pi] = (n)Pi (i=1) F-pi (i),F-Y : F-2(n) --> F-2(n). In this paper, we give a combinatorial upper bound for the number of non-equivalent SDS for a given graph, and we compute this bound explicitly for certain classes of graphs. We give a full characterization of invertible SDS; and analyze the set of fixed points of sequential and parallel cellular automata. Further, we introduce the concept of Maj-type SDS and show that systems of this class only have fixed points as attractors. Finally, we analyze SDS that are fixed point free for arbitrary base graphs. Published by Elsevier Science Inc. C1 Univ Calif Los Alamos Natl Lab, TSA DO SA, Los Alamos, NM 87545 USA. Norwegian Univ Sci & Technol, Dept Math Sci, N-7034 Trondheim, Norway. RP Barrett, CL (reprint author), Univ Calif Los Alamos Natl Lab, TSA DO SA, Mailstop TA-0,SM-1237,MS M997, Los Alamos, NM 87545 USA. NR 5 TC 31 Z9 31 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 USA SN 0096-3003 J9 APPL MATH COMPUT JI Appl. Math. Comput. PD AUG 15 PY 2001 VL 122 IS 3 BP 325 EP 340 DI 10.1016/S0096-3003(00)00042-4 PG 16 WC Mathematics, Applied SC Mathematics GA 455KL UT WOS:000170026000004 ER PT J AU Kachadourian, R Liochev, SI Cabelli, DE Patel, MN Fridovich, I Day, BJ AF Kachadourian, R Liochev, SI Cabelli, DE Patel, MN Fridovich, I Day, BJ TI 2-Methoxyestradiol does not inhibit superoxide dismutase SO ARCHIVES OF BIOCHEMISTRY AND BIOPHYSICS LA English DT Article DE 2-methoxyestradiol; 2-hydroxyestradiol; superoxide; superoxide dismutase; aconitase; lactate dehydrogenase; human leukemia HL-60 cells ID FREE-RADICALS; ESTROGEN; ANION; CARCINOGENESIS; OXIDATION; INDUCTION; CANCER; DAMAGE; CELLS; ASSAY AB It has been reported in the literature that the endogenous estrogen metabolite 2-methoxyestradiol (2-ME) inhibits both manganese and copper,zinc superoxide dismutases (Mn and Cu,Zn SODs) and that this mechanism is responsible for 2-ME's ability to kill cancer cells. In fact, as demonstrated using several SOD assays including pulse radiolysis, 2-ME does not inhibit SOD but rather interferes with the SOD assay originally used. Nevertheless, as confirmed by aconitase inactivation measurements and lactate dehydrogenase release in human leukemia HL-60 cells, 2-ME does increase superoxide production in these cells and is more toxic than its non-O-methylated precursor 2-hydroxyestradiol. Other mechanisms previously suggested in the literature may explain 2-ME's ability to increase intracellular superoxide levels in tumor cells. (C) 2001 Academic Press. C1 Natl Jewish Med & Res Ctr, Dept Med, Denver, CO 80206 USA. Duke Univ, Med Ctr, Dept Biochem, Durham, NC 27708 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP Day, BJ (reprint author), Natl Jewish Med & Res Ctr, Dept Med, 1400 Jackson St, Denver, CO 80206 USA. FU NHLBI NIH HHS [HL59602, HL31992] NR 24 TC 54 Z9 55 U1 0 U2 3 PU ACADEMIC PRESS INC PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0003-9861 J9 ARCH BIOCHEM BIOPHYS JI Arch. Biochem. Biophys. PD AUG 15 PY 2001 VL 392 IS 2 BP 349 EP 353 DI 10.1006/abbi.2001.2455 PG 5 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 463UF UT WOS:000170495100023 PM 11488612 ER PT J AU Yu, EY Pickering, IJ George, GN Prince, RC AF Yu, EY Pickering, IJ George, GN Prince, RC TI In situ observation of the generation of isothiocyanates from sinigrin in horseradish and wasabi SO BIOCHIMICA ET BIOPHYSICA ACTA-GENERAL SUBJECTS LA English DT Article DE X-ray absorption spectroscopy; isothiocyanate; sinigrin; myrosinase ID RAY-ABSORPTION SPECTROSCOPY; SULFUR; INHIBITION; HYDROLYSIS; MYROSINASE; VEGETABLES; PROGRAM AB Sulfur K-edge X-ray absorption spectroscopy has been used to determine the chemical identity of the sulfur-containing species in horseradish (Armoracia lapthifolia) and wasabi (Wasabia japonica) in situ, before and after cell disruption. The major sulfur-containing species in the intact root is sinigrin (1-thio-beta -D-glucopyranose 1-N-(sulfoxy)-3-buteneimidate) and related congeners. Disrupting the cells by applying local pressure allowed the conversion of the sulfur moieties in sinigrin to isothiocyanates and sulfate in approximately equimolar amounts. In contrast to previous suggestions, no detectable thiocyanates were formed, but an unusual thio intermediate may have been identified for the first time. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. Exxon Res & Engn Co, Annandale, NJ 08801 USA. RP George, GN (reprint author), Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. RI George, Graham/E-3290-2013; Pickering, Ingrid/A-4547-2013; OI Pickering, Ingrid/0000-0002-0936-2994 FU NIGMS NIH HHS [GM57375] NR 25 TC 23 Z9 26 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-4165 J9 BBA-GEN SUBJECTS JI Biochim. Biophys. Acta-Gen. Subj. PD AUG 15 PY 2001 VL 1527 IS 3 BP 156 EP 160 DI 10.1016/S0304-4165(01)00161-1 PG 5 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 461QN UT WOS:000170375100008 PM 11479032 ER PT J AU Jaju, RJ Fidler, C Haas, OA Strickson, AJ Watkins, F Clark, K Cross, NCP Cheng, JF Aplan, PD Kearney, L Boultwood, J Wainscoat, JS AF Jaju, RJ Fidler, C Haas, OA Strickson, AJ Watkins, F Clark, K Cross, NCP Cheng, JF Aplan, PD Kearney, L Boultwood, J Wainscoat, JS TI A novel gene, NSD1, is fused to NUP98 in the t(5;11)(q35;p15.5) in de novo childhood acute myeloid leukemia SO BLOOD LA English DT Article ID ACUTE MYELOGENOUS LEUKEMIA; CHROMOSOME-TRANSLOCATION; NUCLEOPORIN NUP98; FUSION; T(7-11)(P15-P15); COACTIVATORS; RECURRENT; CANCER; HOXA9; SITE AB The recurrent translocation t(5;11)(q35; p15.5) associated with a 5q deletion, del(5q), has been reported in childhood acute myeloid leukemia (AML). We report the cloning of the translocation breakpoints in de novo childhood AML harboring a cryptic t(5;11)(q35;p15.5). Fluorescence in situ hybridization (FISH) analysis demonstrated that the nucleoporin gene (NUP98) at 11p15.5 was disrupted by this translocation. By using 3'-rapid amplification of complementary DNA ends (3'-RACE) polymerase chain reaction, we identified a chimeric messenger RNA that results in the in-frame fusion of NUP98 to a novel gene, NSD1. The NSD1 gene has 2596 amino acid residues and a 85% homology to the murine Nsd1 with the domain structure being conserved. The NSD1 gene was localized to 5q35 by FISH and is widely expressed. The reciprocal transcript, NSDI-NUP98, was also detected by reverse transcriptase-polymerase chain reaction. This is the first report in which the novel gene NSD1 has been implicated in human malignancy. C1 Univ Oxford, John Radcliffe Hosp, Nuffield Dept Clin Lab Sci, LRF Mol Haematol Unit, Oxford OX3 9DU, England. Univ Oxford, John Radcliffe Hosp, Inst Mol Med, MRC,Mol Haematol Unit, Oxford OX3 9DU, England. St Anna Childrens Hosp, Childrens Canc Res Inst, A-1090 Vienna, Austria. Hammersmith Hosp, Imperial Coll Sch Med, Dept Haematol, London, England. Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA USA. NCI, Div Clin Sci, Gaithersburg, MD USA. RP Jaju, RJ (reprint author), Univ Oxford, John Radcliffe Hosp, Nuffield Dept Clin Lab Sci, LRF Mol Haematol Unit, Oxford OX3 9DU, England. RI Cross, Nicholas/B-4817-2009; Aplan, Peter/K-9064-2016 OI Cross, Nicholas/0000-0001-5481-2555; NR 20 TC 154 Z9 162 U1 0 U2 5 PU AMER SOC HEMATOLOGY PI WASHINGTON PA 1900 M STREET. NW SUITE 200, WASHINGTON, DC 20036 USA SN 0006-4971 J9 BLOOD JI Blood PD AUG 15 PY 2001 VL 98 IS 4 BP 1264 EP 1267 DI 10.1182/blood.V98.4.1264 PG 4 WC Hematology SC Hematology GA 461KU UT WOS:000170364100054 PM 11493482 ER PT J AU Gamerdinger, AP Kaplan, DI AF Gamerdinger, AP Kaplan, DI TI Colloid transport and deposition in water-saturated yucca mountain tuff as determined by ionic strength SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID HETEROGENEOUS POROUS-MEDIA; GROUND-WATER; PARTICLES; AQUIFER; MOBILIZATION; PLUTONIUM; KAOLINITE; COLUMNS; SHALLOW; CESIUM AB Colloid mobility and deposition were determined in model systems consisting of quartz sand or crushed Yucca Mountain tuff, latex microspheres (colloidal particles), and simulated groundwater. Ionic strength ( was manipulated as a first step in defining limiting conditions for colloid transport in a system modeled after geochemical conditions at the Yucca Mountain site. Solutions of deionized water (DI), 0.1 x, 1 x, and 10 x (the ionic strength of simulated groundwater) (I = 0.0116 M) were used in saturated columns under steady-state flow conditions. Separate experiments with conservative tracers indicated stable hydrodynamic conditions that were independent of I. Colloids were completely mobile (no deposition) in the DI and 0.1 x solutions; deposition increased to 11-13% for 1 x and to 89-97% for 10x treatments with similar results for sand and tuff. Deposition was described as a pseudo-first-order process; however, a decreasing rate of deposition was apparent for colloid transport at the 10x condition through the tuff. A linear dependence of colloid removal (extent and deposition rate coefficient) on I is illustrated for the model Yucca Mountain system and for a glass-KCI system reported in the literature. This simple relationship for saturated systems may be useful for predicting deposition efficiencies under conditions of varying ionic strength. C1 Washington State Univ, Dept Chem, Richland, WA 99352 USA. Washington State Univ, Ctr Multiphase Environm Res, Richland, WA 99352 USA. Pacific NW Natl Lab, Richland, WA USA. Westinghouse Savannah River Co, Savannah River Technol Ctr, Aiken, SC 29808 USA. RP Gamerdinger, AP (reprint author), Washington State Univ, Dept Chem, Richland, WA 99352 USA. NR 37 TC 9 Z9 16 U1 0 U2 16 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD AUG 15 PY 2001 VL 35 IS 16 BP 3326 EP 3331 DI 10.1021/es0015949 PG 6 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 464GL UT WOS:000170524800009 PM 11529572 ER PT J AU Bayne, CK Dindal, AB Jenkins, RA Crumbling, DM Koglin, EN AF Bayne, CK Dindal, AB Jenkins, RA Crumbling, DM Koglin, EN TI Meeting data quality objectives with interval information SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article AB Immunoassay test kits are promising technologies for measuring analytes under field conditions, Frequently, these field-test kits report the analyte concentrations as falling in an interval between minimum and maximum values. Many project managers use field-test kits only for screening purposes when characterizing waste sites because the results are presented as semiquantitative intervals. However, field-test kits that report results as intervals can also be used to make project-related decisions in compliance with false-rejection and false-acceptance decision error rates established during a quantitative data quality objective process. Sampling and analysis plans can be developed that rely on field-test kits to meet certain data needs of site remediation projects. C1 Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Chem & Analyt Sci, Oak Ridge, TN 37831 USA. US EPA, Washington, DC 20460 USA. US EPA, Las Vegas, NV 89193 USA. RP Bayne, CK (reprint author), Oak Ridge Natl Lab, Div Math & Comp Sci, POB 2008, Oak Ridge, TN 37831 USA. NR 21 TC 0 Z9 0 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD AUG 15 PY 2001 VL 35 IS 16 BP 3350 EP 3355 DI 10.1021/es001572m PG 6 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 464GL UT WOS:000170524800013 PM 11529576 ER PT J AU Gu, BH Brown, GM Maya, L Lance, MJ Moyer, BAA AF Gu, BH Brown, GM Maya, L Lance, MJ Moyer, BAA TI Regeneration of perchlorate (ClO4-)-loaded anion exchange resins by a novel tetrachloroferrate (FeCl4-) displacement technique SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID IMPROVED SELECTIVITY; PERTECHNETATE; KINETICS AB Selective ion exchange is one of the preferred treatment technologies for removing low levels of perchlorate (ClO4-) from contaminated water because of its high efficiency and minimal impact on water quality through the addition or removal of chemicals and nutrients. However, the exceptionally high affinity of ClO4--for type I anion-exchange resins makes regeneration with conventional NaCl brine extremely difficult and costly for practical applications. The present study entails the development of a novel regeneration methodology applicable to highly-selective anion-exchange resins. Tetrachloroferrate (FeCl4-) anions, formed in a solution of ferric chloride and hydrochloric acid (e.g., 1 M FeCl3 and 4 M HCl), were found to effectively displace ClO4- anions that were sorbed on the resin. A mass-balance analysis indicated that a nearly 100% recovery of ion-exchange sites was achieved by washing with as little as similar to5 bed volumes of the regenerant solution in a column flow-through experiment. There was no significant deterioration of the resin's performance with respect to ClO4- removal after repeated loading and regeneration cycles. Thus, the new methodology may offer a cost-effective means to regenerate ClO4- -loaded resins with improved regeneration of efficiency, recovery, and waste minimization in comparison with conventional brine regeneration techniques. C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Chem & Analyt Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Gu, BH (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA. RI Solominow, Sonia/A-4021-2008; Gu, Baohua/B-9511-2012; Lance, Michael/I-8417-2016; Moyer, Bruce/L-2744-2016 OI Gu, Baohua/0000-0002-7299-2956; Lance, Michael/0000-0001-5167-5452; Moyer, Bruce/0000-0001-7484-6277 NR 26 TC 90 Z9 99 U1 1 U2 27 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD AUG 15 PY 2001 VL 35 IS 16 BP 3363 EP 3368 DI 10.1021/es0105604i PG 6 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 464GL UT WOS:000170524800015 PM 11529578 ER PT J AU McPherson, BJOL Lichtner, PC Forster, CB Cole, BS AF McPherson, BJOL Lichtner, PC Forster, CB Cole, BS TI Regional-scale permeability by heat flow calibration in the Powder River basin, Wyoming SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID SEDIMENTARY BASIN; GROUNDWATER-FLOW AB Forward modeling of coupled fluid and heat flow in the Powder River basin, Wyoming, is used to explain anomalously high heat flow values observed in the southern portion of the basin. Effective basin-scale permeabilities of selected Powder River basin aquifers and aquitards were calibrated by matching surface heat flow measurements to simulation results. Fractures associated with a large anticline in the southwestern part of the basin were found to play a major role in the basin's thermal regime. While the model results are non-unique, they demonstrate that regional structural features play an important role in a basin's overall energy budget and fluid flow regime. With the results of the basin-scale model it is possible to evaluate regional-scale flow and transport processes. C1 New Mexico Inst Min & Technol, Dept Earth & Environm Sci, Hydrol Program, Socorro, NM 87801 USA. Univ Utah, Dept Geol & Geophys, Salt Lake City, UT 84112 USA. Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. RP McPherson, BJOL (reprint author), New Mexico Inst Min & Technol, Dept Earth & Environm Sci, Hydrol Program, Socorro, NM 87801 USA. NR 20 TC 1 Z9 1 U1 1 U2 3 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 AUG 15 PY 2001 VL 28 IS 16 BP 3211 EP 3214 DI 10.1029/2000GL012591 PG 4 WC Geosciences, Multidisciplinary SC Geology GA 461CV UT WOS:000170348100039 ER PT J AU Knill, E Laflamme, R AF Knill, E Laflamme, R TI Quantum computing and quadratically signed weight enumerators SO INFORMATION PROCESSING LETTERS LA English DT Article DE quantum computing; theory of computing; combinatorial problems; computational complexity ID COMPUTATION AB We prove that quantum computing is polynomially equivalent to classical probabilistic computing with an oracle for estimating the value of simple sums, quadratically signed weight enumerators (QWGTs). The problem of estimating these sums is cast in terms of promise problems and has two interesting variants. An oracle for the unconstrained variant may be more powerful than quantum computing, while an oracle for a more constrained variant is efficiently solvable in the one-bit model of quantum computing. Thus, problems involving QWGTs yield new problems in BQPP (BQP promise problems) and a natural BQPP complete problem. They can be used to define and study complexity classes and their relationships to quantum computing. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Knill, E (reprint author), Los Alamos Natl Lab, MS B265, Los Alamos, NM 87545 USA. EM knill@lanl.gov; laflamme@lanl.gov NR 19 TC 14 Z9 14 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0020-0190 EI 1872-6119 J9 INFORM PROCESS LETT JI Inf. Process. Lett. PD AUG 15 PY 2001 VL 79 IS 4 BP 173 EP 179 DI 10.1016/S0020-0190(00)00222-2 PG 7 WC Computer Science, Information Systems SC Computer Science GA 459RR UT WOS:000170265700004 ER PT J AU Menikoff, R AF Menikoff, R TI Compaction wave profiles: Simulations of gas gun experiments SO JOURNAL OF APPLIED PHYSICS LA English DT Article AB Mesoscale simulations of a compaction wave in a granular bed of HMX have been performed. The grains are fully resolved in order that the compaction, i.e., the porosity behind the wave front, is determined by the elastic-plastic response of the grains rather than by an empirical law for the porosity as a function of pressure. Numerical wave profiles of the pressure and velocity are compared with data from a gas gun experiment. The experiment used an initial porosity of 36%, and the wave had a pressure comparable to the yield strength of the grains. The profiles are measured at the front and back of the granular bed. The transit time for the compaction wave to propagate between the gauges determines the wave speed. The wave speed depends on the porosity behind the wave and is affected by the strength model. The yield strength needed to match the experimental wave speed is discussed. Analysis of the lead wave through the granular bed, based on impedance matches using the Hugoniot loci, indicates that the compaction wave triggers a small amount of burn, less than 1% mass fraction, on the microsecond time scale of the experiment. (C) 2001 American Institute of Physics. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Menikoff, R (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. NR 12 TC 13 Z9 13 U1 1 U2 5 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 2001 VL 90 IS 4 BP 1754 EP 1760 DI 10.1063/1.1385568 PG 7 WC Physics, Applied SC Physics GA 458YN UT WOS:000170223200014 ER PT J AU Guedes, I Hirano, Y Grimsditch, M Wakabayashi, N Loong, CK Boatner, LA AF Guedes, I Hirano, Y Grimsditch, M Wakabayashi, N Loong, CK Boatner, LA TI Raman study of phonon modes in ErVO4 single crystals SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID DOPED LUTETIUM ORTHOPHOSPHATE; TEMPERATURE-DEPENDENCE; OPTICAL SPECTROSCOPY; LATTICE-PARAMETERS; ZIRCON-TYPE; VANADATES; YTTRIUM; SCATTERING; NEODYMIUM; XENOTIME AB The phonon modes of a pure ErVO4 crystal were determined at room temperature using Raman scattering methods, and the observed frequencies were assigned according to group theory in terms of the internal modes of the VO43- ions and the external modes of the Er(VO4) lattice. The assignments of the phonon modes match well with the overall phonon systematics of the rare-earth orthovanadate series, and the results presented here reinforce the general trend of bonding strength in the zircon series of RVO4, RAsO4, and RPO4 materials. (C) 2001 American Institute of Physics. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Keio Univ, Dept Phys, Yokohama, Kanagawa 2238522, Japan. Argonne Natl Lab, Div Intense Pulsed Neutron Source, Argonne, IL 60439 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Fed Ceara, Dept Fis, BR-60455760 Fortaleza, Ceara, Brazil. RP Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. EM ckloong@anl.gov RI GUEDES, ILDE/C-3451-2013; Boatner, Lynn/I-6428-2013; UFC, DF/E-1564-2017; Universidade Federal do Ceara, Physics Department/J-4630-2016; OI Boatner, Lynn/0000-0002-0235-7594; Universidade Federal do Ceara, Physics Department/0000-0002-9247-6780; GUEDES, ILDE/0000-0002-1040-5891 NR 43 TC 24 Z9 25 U1 3 U2 12 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-8979 EI 1089-7550 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 2001 VL 90 IS 4 BP 1843 EP 1846 DI 10.1063/1.1384858 PG 4 WC Physics, Applied SC Physics GA 458YN UT WOS:000170223200028 ER PT J AU Zou, P Xiao, LL Sun, X Gai, W Wong, T AF Zou, P Xiao, LL Sun, X Gai, W Wong, T TI Hybrid dielectric and iris-loaded periodic accelerating structure SO JOURNAL OF APPLIED PHYSICS LA English DT Article AB One disadvantage of conventional iris-loaded accelerating structures is the high ratio of the peak surface electric field to the peak axial electric field useful for accelerating a beam. Typically this ratio E-s/E(a)greater than or equal to2. The high surface electric field relative to the accelerating gradient may prove to be a limitation for realizing technologies for very high gradient accelerators. In this article, we present a scheme that uses a hybrid dielectric and iris-loaded periodic structure to reduce E-s/E-a to near unity, while the shunt impedance per unit length r and the quality factor Q compare favorably with conventional metallic structures. The analysis based on MAFIA simulations of such structures shows that we can lower the peak surface electric field close to the accelerating gradient while maintaining high acceleration efficiency as measured by r/Q. Numerical examples of X-band hybrid accelerating structures are given. (C) 2001 American Institute of Physics. C1 Argonne Natl Lab, Argonne, IL 60439 USA. IIT, Chicago, IL 60616 USA. RP Zou, P (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 14 TC 4 Z9 5 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 2001 VL 90 IS 4 BP 2017 EP 2023 DI 10.1063/1.1383578 PG 7 WC Physics, Applied SC Physics GA 458YN UT WOS:000170223200056 ER PT J AU Miller, JT Marshall, CL Kropf, AJ AF Miller, JT Marshall, CL Kropf, AJ TI (CO)MoS2/alumina hydrotreating catalysts: An EXAFS study of the chemisorption and partial oxidation with O-2 SO JOURNAL OF CATALYSIS LA English DT Article DE hydrodesulfurization; EXAFS; molybdenum; cobalt; COMO catalyst; HDS catalyst; O-2 chemisorption ID MOSSBAUER EMISSION-SPECTROSCOPY; MO-S PHASE; MOLYBDENUM SULFIDE CATALYSTS; DYNAMIC OXYGEN-CHEMISORPTION; HYDRODESULFURIZATION CATALYSTS; ACTIVE-SITES; ALUMINA CATALYSTS; CO; CARBON; COBALT AB The adsorption Of O-2 on alumina-supported (Co)MoS2 catalysts and the subsequent mild oxidation of the (CO)MoS2 by O-2 have been studied by extended X-ray absorption fine-structure (EXAFS) spectroscopy. By analyzing the difference between spectra before and after O-2 exposure, small changes in the structure could be determined, which were not resolved using standard methods. At 20 degreesC on MoS2/alumina and (CO)MoS2/alumina, O-2 is chemisorbed at the edge of the MoS2 particles at a Mo-O distance of 1.73(2) Angstrom. The O-2 chemisorption results at the Mo edge indicate that, despite the large fraction of Co at the surface of the MoS2 crystallite in (CO)MoS2/alumina, some of the Mo atoms are exposed to the reacting gases. At 100 degreesC, there is partial substitution of S by O atoms in the Mo coordination sphere. The resulting decrease in both the Mo-S and Mo-Mo coordination numbers indicates partial disruption of the MoS2 crystallites. At 20 degreesC, O-2 chemisorption on (Co)MoS2/alumina also leads to displacement of the terminal Co-S bond and the formation of one Co-O bond at a distance of about 2.01(5) Angstrom. The terminal Co-S bond distance is 2.26(2) Angstrom and is significantly longer than the four bridging Mo-S-Co bonds, which are 2.18(2) Angstrom. At 100 degreesC, the latter are unreactive to O-2, although the Co ion coordination increases to about six, i.e., four bridging Co-S and two terminal Co-O bonds. The Co chemisorption results suggest that the terminal Co-S is the reactive bond that has been displaced by the oxygen adsorbate. (C) 2001 Academic Press. C1 BP Res Ctr, Naperville, IL 60563 USA. Argonne Natl Lab, Div Chem Technol, Argonne, IL 60439 USA. RP Miller, JT (reprint author), BP Res Ctr, E-1F,150 Warrenville Rd, Naperville, IL 60563 USA. RI ID, MRCAT/G-7586-2011; Kropf, Arthur/B-8665-2015; Marshall, Christopher/D-1493-2015 OI Marshall, Christopher/0000-0002-1285-7648 NR 52 TC 19 Z9 19 U1 3 U2 21 PU ACADEMIC PRESS INC 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 AUG 15 PY 2001 VL 202 IS 1 BP 89 EP 99 DI 10.1006/jcat.2001.3273 PG 11 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA 463TR UT WOS:000170493800009 ER PT J AU Yang, X Wang, XB Wang, LS AF Yang, X Wang, XB Wang, LS TI Photodetachment of F-(H2O)(n) (n=1-4): Observation of charge-transfer states [F-(H2O)(n)(+)] and the transition state of F+H2O hydrogen abstraction reaction SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID NEGATIVE ELECTRON-BINDING; X = F; AB-INITIO; PHOTOELECTRON-SPECTROSCOPY; VIBRATIONAL SPECTROSCOPY; WATER CLUSTERS; I CLUSTERS; ENERGY; ENERGETICS; SPECTRA AB We report a photoelectron spectroscopic study of F-(H2O)(n) (n=1-4) at 193 and 157 nm. In addition to a detachment feature from F-, we observed a higher binding energy feature in all spectra due to ionization of the solvent molecules leading to F-(H2O)(n)(+) charge-transfer states. Detachment of an electron from F- in F-(H2O) reaches the transition state region of the reaction, F+H2O --> HF+OH. The bound to non-bound transition resulted in a long tail at the low binding energy side in the photoelectron spectrum of F-(H2O). We estimated that the neutral F . . .H2O complex at the anion geometry, which is near the transition state region of the H-abstraction reaction, is 6 +/-1 kcal/mol above the F+H2O asymptote, consistent with a previous estimation of a 4 kcal/mol entrance barrier height for this reaction. (C) 2001 American Institute of Physics. C1 Washington State Univ, Dept Phys, Richland, WA 99352 USA. Pacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, Richland, WA 99352 USA. RP Wang, LS (reprint author), Washington State Univ, Dept Phys, Richland, WA 99352 USA. NR 32 TC 35 Z9 36 U1 0 U2 7 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 15 PY 2001 VL 115 IS 7 BP 2889 EP 2892 DI 10.1063/1.1394758 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 459YC UT WOS:000170278200002 ER PT J AU Wang, HB Thoss, M Miller, WH AF Wang, HB Thoss, M Miller, WH TI Systematic convergence in the dynamical hybrid approach for complex systems: A numerically exact methodology SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID SPIN-BOSON PROBLEM; ELECTRONICALLY NONADIABATIC DYNAMICS; DEPENDENT HARTREE METHOD; THERMAL RATE CONSTANTS; PATH-INTEGRAL APPROACH; SEMICLASSICAL THEORY; MOLECULE COLLISIONS; DISSIPATIVE DYNAMICS; CHEMICAL-REACTIONS; QUANTUM DYNAMICS AB An efficient method, the self-consistent hybrid method, is proposed for accurately simulating time-dependent quantum dynamics in complex systems. The method is based on an iterative convergence procedure for a dynamical hybrid approach. In this approach, the overall system is first partitioned into a "core" and a "reservoir" (an initial guess). The former is treated via an accurate quantum mechanical method, namely, the time-dependent multiconfiguration self-consistent field or multiconfiguration time-dependent Hartree approach, and the latter is treated via a more approximate method, e.g., classical mechanics, semiclassical initial value representations, quantum perturbation theories, etc. Next, the number of "core" degrees of freedom, as well as other variational parameters, is systematically increased to achieve numerical convergence for the overall quantum dynamics. The method is applied to two examples of quantum dissipative dynamics in the condensed phase: the spin-boson problem and the electronic resonance decay in the presence of a vibrational bath. It is demonstrated that the method provides a practical way of obtaining accurate quantum dynamical results for complex systems. (C) 2001 American Institute of Physics. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Kenneth S Pitzer Ctr Theoret Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Thoss, M (reprint author), Tech Univ Munich, D-85747 Garching, Germany. RI Wang, Haobin/E-1208-2011; Thoss, Michael/C-5976-2013 NR 52 TC 113 Z9 113 U1 3 U2 19 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 15 PY 2001 VL 115 IS 7 BP 2979 EP 2990 DI 10.1063/1.1385561 PG 12 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 459YC UT WOS:000170278200013 ER PT J AU Thoss, M Wang, HB Miller, WH AF Thoss, M Wang, HB Miller, WH TI Self-consistent hybrid approach for complex systems: Application to the spin-boson model with Debye spectral density SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ELECTRON-TRANSFER REACTIONS; QUANTUM RELAXATION DYNAMICS; DISSIPATIVE 2-STATE SYSTEM; POTENTIAL-ENERGY SURFACES; PATH-INTEGRAL APPROACH; MIXED-VALENCE SYSTEMS; WAVE-PACKET DYNAMICS; ZERO-POINT ENERGY; VIBRATIONAL COHERENCE; SEMICLASSICAL THEORY AB The self-consistent hybrid approach [H. Wang, M. Thoss, and W. H. Miller, J. Chem. Phys. 115, 2979 (2001), preceding paper] is applied to the spin-boson problem with Debye spectral density as a model for electron-transfer reactions in a solvent exhibiting Debye dielectric relaxation. The population dynamics of the donor and acceptor states in this system is studied for a broad range of parameters, including the adiabatic (slow bath), nonadiabatic (fast bath), as well as the intermediate regime. Based on illustrative examples we discuss the transition from damped coherent dynamics to purely incoherent decay. Using the numerically exact results of the self-consistent hybrid approach as a benchmark, several approximate theories that have been widely used to describe the dynamics in the spin-boson model are tested: the noninteracting blip approximation, the Bloch-Redfield theory, the Smoluchowski-equation treatment of the reaction coordinate (Zusman equations), and the classical path approach (Ehrenfest model). The parameter range where the different methods are applicable are discussed in some detail. (C) 2001 American Institute of Physics. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Kenneth S Pitzer Ctr Theoret Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Thoss, M (reprint author), Tech Univ Munich, D-85747 Garching, Germany. RI Wang, Haobin/E-1208-2011; Thoss, Michael/C-5976-2013 NR 97 TC 132 Z9 132 U1 2 U2 27 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 15 PY 2001 VL 115 IS 7 BP 2991 EP 3005 DI 10.1063/1.1385562 PG 15 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 459YC UT WOS:000170278200014 ER PT J AU Zhao, CY Balasubramanian, K AF Zhao, CY Balasubramanian, K TI Geometries and spectroscopic properties of germanium and tin hexamers (Ge-6, Ge-6(+), Ge-6(-), Sn-6, Sn-6(+), and Sn-6(-)) SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID POTENTIAL-ENERGY SURFACES; SMALL SILICON CLUSTERS; RELATIVISTIC EFFECTIVE POTENTIALS; ANION PHOTOELECTRON-SPECTROSCOPY; SPIN-ORBIT OPERATORS; LOW-LYING STATES; ELECTRONIC STATES; MASS-SPECTROMETRY; INFRARED-SPECTRA; SI3 AB Ground and excited electronic states of neutral, cationic and anionic germanium and tin hexamers (Ge-6 and Sn-6) are investigated. Different geometries such as tetragonal bipyramid (D-4h,D-2h) and edge-caped trigonal bipyramid (C-2v) (ECTBP) were studied. We have employed a number of high level electron correlation techniques such as large scale multireference singles+doubles configuration interaction (MRSDCI) computations that included up to 16 million configurations, complete active-space multiconfiguration self-consistent filed (CAS-MCSCF), and Moller-Plesset (MP2) techniques to investigate the low-lying electronic states, their geometries and energy separations. A (1)A(1g) tetragonal bipyramid structure (D-4h symmetry) is found as the ground state for both Ge-6 and Sn-6, in accord with the previously suggested experimental assignments. The excitation energies, atomization energies, ionization potentials and vertical and adiabatic electron affinities are computed and compared with the experimental results. Our computations of the excited states of these species have facilitated assignment of the anion photodetachment spectra of the anions of these clusters and comparison with the photoionization spectra of the neutral species. (C) 2001 American Institute of Physics. C1 Univ Calif Davis, Coll Engn, Dept Appl Sci, Livermore, CA 94550 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, Coll Engn, Dept Appl Sci, POB 808,L-794, Livermore, CA 94550 USA. NR 51 TC 15 Z9 15 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 15 PY 2001 VL 115 IS 7 BP 3121 EP 3133 DI 10.1063/1.1386795 PG 13 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 459YC UT WOS:000170278200028 ER PT J AU Defazio, P Petrongolo, C Gray, SK Oliva, C AF Defazio, P Petrongolo, C Gray, SK Oliva, C TI Wave packet dynamics of the N(S-4)+O-2(X (3)Sigma(-)(g))-> NO(X (2)Pi)+O(P-3) reaction on the X (2)A ' potential energy surface SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID RATE CONSTANTS; RATE COEFFICIENTS; QUANTUM DYNAMICS; SCATTERING; PROBABILITIES AB We report three-dimensional quantum calculations of total angular momentum J=0 reaction probabilities, J-shifting cross sections, and rate constants of the title reaction. Employing the real wave packet approach, we propagate wave packets corresponding to several O-2(v,j) initial levels on the X (2)A(') potential surface of Sayos As collision energy increases, the average probabilities first increase monotonically and then become nearly constant, while the cross sections rise in the overall energy range. Numerous probability resonances point out the formation of NOO collision complexes and NO final states. Rotational excitation in O-2 decreases the collisional energy thresholds and enhances the state-resolved rate constants, mainly at low temperature. O-2 vibrational excitation inhibits the reactivity, although the energy thresholds are still reduced. With respect to previous quasiclassical and mixed quantum-classical studies, we obtain lower thresholds and cross sections but similar rate constants, which are however lower than experimental rates. By inspection of the average properties of the wave packets, we suggest a qualitative reaction mechanism, we propose a modified J-shifting approximation, and we find a possible explanation of the low quantum reactivity on the present potential. (C) 2001 American Institute of Physics. C1 Univ Siena, Dipartimento Chim, I-53100 Siena, Italy. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. Univ Barcelona, Dept Quim Fis, E-08028 Barcelona, Spain. Univ Barcelona, Ctr Recerca Quim Teor, E-08028 Barcelona, Spain. RP Defazio, P (reprint author), Univ Siena, Dipartimento Chim, Via A Moro, I-53100 Siena, Italy. EM petro@hal.icqem.pi.cnr.it NR 25 TC 13 Z9 13 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 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 15 PY 2001 VL 115 IS 7 BP 3208 EP 3214 DI 10.1063/1.1386653 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 459YC UT WOS:000170278200036 ER PT J AU Qi, SY Chakraborty, AK Balsara, NP AF Qi, SY Chakraborty, AK Balsara, NP TI Microphase segregation in molten randomly grafted copolymers SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID CORRELATED RANDOM COPOLYMERS; MEAN-FIELD THEORY; BLOCK-COPOLYMERS; RANDOM HETEROPOLYMERS; FLUCTUATION CORRECTIONS; MULTIBLOCK COPOLYMERS; MELTS; SEPARATION; THERMODYNAMICS; TRANSITION AB We study microphase ordering of molten randomly grafted copolymers (RGCs) by using a mean field theory and the replica method to calculate the quenched average. Our results illustrate that in the weak segregation limit (WSI), the optimal wave vector q* of the lamellar phase formed by molten RGCs, has a temperature dependence different from either linear random copolymers (LRCs) or diblock copolymers (DCPs): when close, but below the microphase separation transition (MST) temperature, q* increases sharply with decreasing temperature; then q* gradually acquires an asymptotic value determined by the length of the branch and the average distance between branch points on the backbone. Our results are compared with recent experiments, and the effects of chain architecture on the microphase separation characteristics of RGCs are delineated. Our results suggest a new method for controlling the microphase spacing by exploiting quenched disorder. (C) 2001 American Institute of Physics. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem, Berkeley, CA 94720 USA. RP Qi, SY (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem Engn, Berkeley, CA 94720 USA. NR 37 TC 13 Z9 13 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 15 PY 2001 VL 115 IS 7 BP 3387 EP 3400 DI 10.1063/1.1382856 PG 14 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 459YC UT WOS:000170278200057 ER PT J AU Qi, SY Chakraborty, AK AF Qi, SY Chakraborty, AK TI The phase diagram of molten randomly grafted copolymers SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID CORRELATED RANDOM COPOLYMERS; MICROPHASE SEPARATION; RANDOM HETEROPOLYMERS; FLUCTUATION CORRECTIONS; MULTIBLOCK COPOLYMERS; MELTS; THERMODYNAMICS; POLYMERS; BEHAVIOR; ARRAYS AB We study the microphase segregation of molten randomly grafted copolymers (RGCs) using a Landau field theory. Under one wave number approximation, we find three equilibrium ordered microphases: lamellar phase (LAM), hexagonal cylinder phase (HEX), and bcc sphere phase (BCC). The stability of these phases strongly depends on the architectural parameters describing the RGC chains (e.g., the backbone length, the branch length, and the number of branches). Our calculation reveals that RGCs with high average composition of backbone monomers or with low branching density tend to form LAM microstructures. For a small average composition of backbone monomers, HEX and BCC microphases appear in turn with increasing branching density. Independent of the architectural parameters and composition, the disorder to order transition for molten RGCs is always from the disordered phase to the LAM microphase. The physical reasons underlying this behavior and experimentally testable predictions are discussed. (C) 2001 American Institute of Physics. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Qi, SY (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem Engn, Berkeley, CA 94720 USA. NR 32 TC 10 Z9 10 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 15 PY 2001 VL 115 IS 7 BP 3401 EP 3405 DI 10.1063/1.1382857 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 459YC UT WOS:000170278200058 ER PT J AU Messinger, J Robblee, JH Bergmann, U Fernandez, C Glatzel, P Visser, H Cinco, RM McFarlane, KL Bellacchio, E Pizarro, SA Cramer, SP Sauer, K Klein, MP Yachandra, VK AF Messinger, J Robblee, JH Bergmann, U Fernandez, C Glatzel, P Visser, H Cinco, RM McFarlane, KL Bellacchio, E Pizarro, SA Cramer, SP Sauer, K Klein, MP Yachandra, VK TI Absence of Mn-centered oxidation in the S-2 -> S-3 Transition: Implications for the mechanism of photosynthetic water oxidation SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Review ID X-RAY-ABSORPTION; OXYGEN-EVOLVING COMPLEX; ELECTRON-PARAMAGNETIC-RES; MULTILINE EPR SIGNAL; PHOTOSYSTEM-II PARTICLES; S-1-STATE MANGANESE CLUSTER; S-STATE TRANSITIONS; GALACTOSE-OXIDASE; ACTIVE-SITE; OXIDIZING COMPLEX AB A key question for the understanding of photosynthetic water oxidation is whether the four oxidizing equivalents necessary to oxidize water to dioxygen are accumulated on the four Mn ions of the oxygen-evolving complex (OEC), or whether some ligand-centered oxidations take place before the formation and release of dioxygen during the S-3 --> [S-4] --> So transition. Progress in instrumentation and flash sample preparation allowed us to apply Mn K beta X-ray emission spectroscopy (K beta XES) to this problem for the first time. The K beta XES results, in combination with Mn X-ray absorption near-edge structure (XANES) and electron paramagnetic resonance (EPR) data obtained from the same set of samples, show that the S-2 --> S3 transition, in contrast to the S-0 --> S-1 and S-1 --> S-2 transitions. does not involve a Mn-centered oxidation. On the basis of new structural data from the S-3-state, manganese mu -oxo bridge radical formation is proposed for the S-2 --> S-3 transition, and three possible mechanisms for the O-O bond formation are presented. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Melvin Calvin Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. RP Messinger, J (reprint author), Tech Univ Berlin, Max Volmer Lab, PC 14,Str 17 Juni 135, D-10623 Berlin, Germany. RI Fernandez, Carmen/C-9546-2012; Glatzel, Pieter/E-9958-2010; Institute of Chemistry - USP, Dept. of Chemistry/B-8988-2012 OI Fernandez, Carmen/0000-0003-2201-6241; Glatzel, Pieter/0000-0001-6532-8144; FU NIGMS NIH HHS [R01 GM055302, R56 GM055302] NR 136 TC 199 Z9 201 U1 3 U2 47 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 AUG 15 PY 2001 VL 123 IS 32 BP 7804 EP 7820 DI 10.1021/ja004307+ PG 17 WC Chemistry, Multidisciplinary SC Chemistry GA 463ZD UT WOS:000170506400007 PM 11493054 ER PT J AU Gregg, BA Cormier, RA AF Gregg, BA Cormier, RA TI Doping molecular semiconductors: n-Type doping of liquid crystal perylene diimide SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID CONDUCTING POLYMERS; THIN-FILMS; PENTACENE C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. Metropolitan State Coll, Dept Chem, Denver, CO 80204 USA. RP Gregg, BA (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. NR 21 TC 139 Z9 140 U1 3 U2 27 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 15 PY 2001 VL 123 IS 32 BP 7959 EP 7960 DI 10.1021/ja016410k PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 463ZD UT WOS:000170506400044 PM 11493091 ER PT J AU Stevens, PW Hall, JG Lyamichev, V Neri, BP Lu, MC Wang, LM Smith, LM Kelso, DM AF Stevens, PW Hall, JG Lyamichev, V Neri, BP Lu, MC Wang, LM Smith, LM Kelso, DM TI Analysis of single nucleotide polymorphisms with solid phase invasive cleavage reactions SO NUCLEIC ACIDS RESEARCH LA English DT Article ID FRAGMENT LENGTH POLYMORPHISM; SIGNAL AMPLIFICATION REACTION; OLIGONUCLEOTIDE ARRAYS; DNA HYBRIDIZATION; IDENTIFICATION; MICROPARTICLES; REPLICATION; POLYMERASE; MUTATION AB Using microparticles as the capture surface and fluorescence resonance energy transfer as the detection technology, we have demonstrated the feasibility of performing the invasive cleavage reaction on a solid phase. An effective tool for many genomic applications, the solution phase invasive cleavage assay is a signal amplification method capable of distinguishing nucleic acids that differ by only a single base mutation. The method positions two overlapping oligonucleotides, the probe and upstream oligonucleotides, on the target nucleic acid to create a complex recognized and cleaved by a structure-specific 5'-nuclease. For microarray and other multiplex applications, however, the method must be adapted to a solid phase platform. Effective cleavage of the probe oligonucleotide occurred when either of the two required overlapping oligonucleotides was configured as the particle-bound reagent and also when both oligonucleotides were attached to the solid phase. Positioning probe oligonucleotides away from the particle surface via long tethers improved both the signal and the reaction rates. The particle-based invasive cleavage reaction was capable of distinguishing the ApoE Cys158 and Arg158 alleles at target concentrations as low as 100 amol/assay (0.5 pM). C1 Northwestern Univ, Robert R McCormick Sch Engn & Appl Sci, Dept Biomed Engn, Evanston, IL 60208 USA. Argonne Natl Lab, Biosci Div, Argonne, IL 60439 USA. Third Wave Technol, Madison, WI 53719 USA. Univ Wisconsin, Dept Chem, Madison, WI 53706 USA. RP Stevens, PW (reprint author), Northwestern Univ, Robert R McCormick Sch Engn & Appl Sci, Dept Biomed Engn, 2145 Sheridan Rd, Evanston, IL 60208 USA. RI Kelso, David/B-7619-2009; Kelso, David/F-5622-2013 NR 26 TC 20 Z9 20 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PD AUG 15 PY 2001 VL 29 IS 16 BP art. no. EP e77 PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 466BD UT WOS:000170623700024 ER PT J AU Thorsmolle, VK Averitt, RD Maley, MP Bulaevskii, LN Helm, C Taylor, AJ AF Thorsmolle, VK Averitt, RD Maley, MP Bulaevskii, LN Helm, C Taylor, AJ TI C-axis Josephson plasma resonance observed in Tl2Ba2CaCu2O8 superconducting thin films by use of terahertz time-domain spectroscopy SO OPTICS LETTERS LA English DT Article ID LAYERED SUPERCONDUCTORS; BI2SR2CACU2O8+DELTA AB We have unambiguously observed the c-axis Josephson plasma resonance (JPR) in high-critical-temperature (T-c) cuprate (Tl2Ba2CaCu2O8) superconducting thin films, employing terahertz time-domain spectroscopy in transmission as a function of temperature in zero magnetic field. These are believed to be the first measurements of the JPR temperature dependence of a high-T-c material in transmission. With increasing temperature, the JPR shifts from 705 GHz at 10 K to similar to 170 GHz at 98 K, corresponding to an increase in c-axis penetration depth from 22.4 +/- 0.6 mum to 94 +/- 9 mum. The linewidth of the JPR peak increases with temperature, which indicates an increase in the quasi-particle scattering rate. We have probed the onset of the c-axis phase coherence to similar to0.95 T-c. The JPR vanishes above T-c as expected. (C) 2001 Optical Society of America. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Thorsmolle, VK (reprint author), Los Alamos Natl Lab, MS K763, Los Alamos, NM 87545 USA. RI Thorsmolle, Verner/M-1095-2015 OI Thorsmolle, Verner/0000-0002-5890-4403 NR 10 TC 26 Z9 26 U1 0 U2 3 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD AUG 15 PY 2001 VL 26 IS 16 BP 1292 EP 1294 DI 10.1364/OL.26.001292 PG 3 WC Optics SC Optics GA 462GC UT WOS:000170411500028 PM 18049590 ER PT J AU Cha, YS AF Cha, YS TI Magnetic diffusion and dissipation in high-T-c superconductors subjected to sinusoidal applied fields SO PHYSICA C LA English DT Article DE magnetic diffusion; AC loss; fault current limiter; critical state model; transient response of high-T-c superconductors ID FAULT CURRENT LIMITER; TUBE AB Solution of the linear magnetic diffusion equation of a superconductor slab with a sinusoidal applied field is used to explain recently reported experimental results on the transient response of a high-T-c superconductor tube. The developed linear model can qualitatively explain very well the experimentally observed delay between the applied field and the penetrated field, and other salient features of the experiments. The analysis shows that the linear magnetic-flux-density profile of Bean's critical-state model is not approached, even under quasi-steady-state conditions. A direct consequence of magnetic diffusion is that, under AC steady-state condition, dissipation is always associated with rhoJ(2), in addition to the hysterestic loss. The results of the analysis can also be used to explain qualitatively the characteristics of a superconductor-shielded core reactor. The effects of nonlinear magnetic diffusion and heating are discussed. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Energy Technol Div 335, Argonne, IL 60439 USA. RP Cha, YS (reprint author), Argonne Natl Lab, Energy Technol Div 335, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 14 TC 9 Z9 9 U1 0 U2 0 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 15 PY 2001 VL 361 IS 1 BP 1 EP 12 DI 10.1016/S0921-4534(01)00287-8 PG 12 WC Physics, Applied SC Physics GA 465BV UT WOS:000170569300001 ER PT J AU Al-Lehyani, I Widom, M Wang, Y Moghadam, N Stocks, GM Moriarty, JA AF Al-Lehyani, I Widom, M Wang, Y Moghadam, N Stocks, GM Moriarty, JA TI Transition-metal interactions in aluminum-rich intermetallics SO PHYSICAL REVIEW B LA English DT Article ID AL-CU-CO; PRINCIPLES INTERATOMIC POTENTIALS; GENERALIZED PSEUDOPOTENTIAL THEORY; DENSITY-FUNCTIONAL FORMULATION; DECAGONAL QUASI-CRYSTAL; ELECTRONIC-STRUCTURE; PHASE-DIAGRAMS; STABILITY; QUASICRYSTALS; DYNAMICS AB The extension of the first-principles generalized pseudopotential theory (GPT) to transition-metal (TM) aluminides produces pair and many-body interactions that allow efficient calculations of total energies. In aluminum-rich systems treated at the pair-potential level, one practical limitation is a transition-metal overbinding that creates an unrealistic TM-TM attraction at short separations in the absence of balancing many-body contributions. Even with this limitation, the GPT pair potentials have been used effectively in total-energy calculations for Al-TM systems with TM atoms at separations greater than 4 Angstrom. An additional potential term may be added for systems with shorter TM atom separations, formally folding repulsive contributions of the three- and higher-body interactions into the pair potentials, resulting in structure-dependent TM-TM potentials. Towards this end, we have performed numerical ab initio total-energy calculations using the Vienna ab initio simulation package for an Al-Co-Ni compound in a particular quasicrystalline approximant structure. The results allow us to fit a short-ranged, many-body correction of the form a (r(0)/r)(b) to the GPT pair potentials for Co-Co, Co-Ni, and Ni-Ni interactions. C1 Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA. King Abdulaziz Univ, Dept Phys, Jeddah, Saudi Arabia. Pittsburgh Supercomp Ctr, Pittsburgh, PA 15213 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA. RI Widom, Michael/P-2531-2014; Stocks, George Malcollm/Q-1251-2016 OI Widom, Michael/0000-0001-5972-5696; Stocks, George Malcollm/0000-0002-9013-260X NR 35 TC 22 Z9 22 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 15 PY 2001 VL 64 IS 7 AR 075109 DI 10.1103/PhysRevB.64.075109 PG 7 WC Physics, Condensed Matter SC Physics GA 463WU UT WOS:000170500900039 ER PT J AU Caspersen, KJ Evans, JW AF Caspersen, KJ Evans, JW TI Metal homoepitaxial growth at very low temperatures: Lattice-gas-models with restricted downward funneling SO PHYSICAL REVIEW B LA English DT Article ID THIN-FILM GROWTH; EPITAXIAL-GROWTH; RANDOM-DEPOSITION; 2+1 DIMENSIONS; SMOOTH GROWTH; TRANSITION; OSCILLATIONS; DEPENDENCE; MORPHOLOGY; SCATTERING AB We develop and analyze 1 + 1- and 2 + 1-dimensional (d) models for multilayer homoepitaxial growth of metal films at low temperatures (T), where intralayer terrace diffusion is inoperative. This work is motivated by recent variable-temperature scanning tunneling microscopy studies of Ag/Ag(100) homoepitaxy down to 50 K. Adsorption sites are bridge sites in our 1 + 1d models, and fourfold hollow sites in our 2 + 1d models for fcc(100) or bcc(100) surfaces. For growth at 0 K, we introduce a "restricted downward funneling" model, wherein deposited atoms can be trapped on the sides of steep nanoprotrusions rather than always funneling down to lower adsorption sites. This leads to the formation of overhangs and internal defects (or voids), and associated "rough" growth. Upon increasing T, we propose that a series of interlayer diffusion processes become operative, with activation barriers below that for terrace diffusion. This leads to "smooth" growth of the film for higher T (but still within the regime where terrace diffusion is absent), similar to that observed in models incorporating "complete downward funneling." C1 Iowa State Univ Sci & Technol, Dept Chem, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Dept Math, Ames, IA 50011 USA. RP Caspersen, KJ (reprint author), Iowa State Univ Sci & Technol, Dept Chem, Ames, IA 50011 USA. NR 36 TC 14 Z9 14 U1 0 U2 4 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 15 PY 2001 VL 64 IS 7 AR 075401 DI 10.1103/PhysRevB.64.075401 PG 11 WC Physics, Condensed Matter SC Physics GA 463WU UT WOS:000170500900081 ER PT J AU Chambers, SA Droubay, T AF Chambers, SA Droubay, T TI Role of oxide ionicity in electronic screening at oxide/metal interfaces SO PHYSICAL REVIEW B LA English DT Article ID EPITAXIAL-GROWTH; PT(111); FILMS; CHROMIUM; SURFACE; METALS; CR2O3 AB Metal and oxygen core-level Auger and photoemission spectra have been measured for ultrathin epitaxial films of alpha -Cr2O3 and alpha -Fe2O3 on Pt(111). The binding-energy shifts of monolayer films relative to thicker films suggest a much smaller extent of screening by the metal substrate than that reported earlier for MgO/ Ag(001) [S. Altieri, L. H. Tjeng, F. C. Voogt, T. Hibma, and G. A. Sawatsky, Phys. Rev. B 59, R2517 (1999)]. This finding suggests that the higher degree of bond covalency in alpha -Cr2O3 and alpha -Fe2O3 relative to MgO results in more effective intrinsic screening of charge-transfer processes, rendering the metal much less effective for extrinsic screening. As a result, the metal is expected to have a negligible effect on the optical, electronic, and magnetic properties of the oxide. C1 Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. RP Chambers, SA (reprint author), Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. RI Droubay, Tim/D-5395-2016 OI Droubay, Tim/0000-0002-8821-0322 NR 16 TC 37 Z9 37 U1 1 U2 11 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 15 PY 2001 VL 64 IS 7 AR 075410 DI 10.1103/PhysRevB.64.075410 PG 6 WC Physics, Condensed Matter SC Physics GA 463WU UT WOS:000170500900090 ER PT J AU Kang, JS Park, JG McEwen, KA Olson, CG Kwon, SK Min, BI AF Kang, JS Park, JG McEwen, KA Olson, CG Kwon, SK Min, BI TI Temperature-dependent valence-band photoemission study of UNiSn SO PHYSICAL REVIEW B LA English DT Article ID METALLIC MAGNET UNISN; ELECTRONIC-STRUCTURE; XPS SPECTRA; QUADRUPOLAR; TRANSITION; SYSTEMS AB The electronic structure of UNiSn has been investigated using photoemission spectroscopy (PES). The U 5f partial spectral weight (PSW) exhibits a broad peak centered at approximate to0.3 eV below E-F. The Ni 3d PSW shows the main peak well below E-F and a very low density of states (DOS) at E-F. The h nu dependence of the valence-band spectrum reveals a dominant U 5f electron character for the states near the Fermi level E-F, with a small contribution from the U 6d, Ni 3d, and Sn sp states. Comparison of the measured PES spectra to the LSDA+ U band structure calculation indicates the importance of the on-site Coulomb interaction between U 5f electrons in UNiSn. The high-resolution photoemission spectrum of UNiSn is described well by a V-shaped metallic DOS near E-F, suggesting a finite but reduced DOS at E-F. A possible origin for the reduced DOS at E-F might be the hybridization of the U 5f states to the Ni 3d states that have a very low DOS at E-F. T-dependent high-resolution PES for UNiSn reveals a finite DOS at E-F even above T-N. C1 Catholic Univ Korea, Dept Phys, Puchon 420743, South Korea. Inha Univ, Dept Phys, Inchon, South Korea. UCL, Dept Phys & Astron, London WC1E 6BT, England. Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. Pohang Univ Sci & Technol, Dept Phys, Pohang 780784, South Korea. RP Kang, JS (reprint author), Catholic Univ Korea, Dept Phys, Puchon 420743, South Korea. RI Park, Je Geun/K-8571-2013 NR 29 TC 10 Z9 10 U1 0 U2 4 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 15 PY 2001 VL 64 IS 8 AR 085101 DI 10.1103/PhysRevB.64.085101 PG 8 WC Physics, Condensed Matter SC Physics GA 466AW UT WOS:000170623000020 ER PT J AU Kralj, M Siber, A Pervan, P Milun, M Valla, T Johnson, PD Woodruff, DP AF Kralj, M Siber, A Pervan, P Milun, M Valla, T Johnson, PD Woodruff, DP TI Temperature dependence of photoemission from quantum-well states in Ag/V(100): Moving surface-vacuum barrier effects SO PHYSICAL REVIEW B LA English DT Article ID ANGLE-RESOLVED PHOTOEMISSION; THIN SILVER FILMS; INVERSE-PHOTOEMISSION; V(100) SURFACE; ELECTRON; ENERGY; SPECTROSCOPY; CU(111); CU(100); SYSTEM AB The temperature dependence of angle-resolved photoemission from quantum-well states in ultrathin films of Ag on V(100) has been examined for films from 1-8 ML thickness within the temperature range 45-600 K. Contrary to bulk solids, the photoemission peaks shift to higher binding energy as the temperature is increased. The temperature dependence of the peak widths is linear, consistent with the expected behavior for electron-phonon coupling, but the coupling parameter lambda is found to show a strong oscillatory dependence on film thickness, with some values many times larger than those found for bulk silver. The observations are explained in terms of the influence on both the initial and final states in the photoemission process of the static and dynamic movements of the surface-vacuum interface barrier induced by temperature changes. C1 Inst Phys, Zagreb 10000, Croatia. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. RP Kralj, M (reprint author), Inst Phys, POB 304, Zagreb 10000, Croatia. RI Kralj, Marko/A-8232-2008; Pervan, Petar/F-8142-2010; Siber, Antonio/B-8881-2008; Milun, Milorad/A-3420-2010 OI Kralj, Marko/0000-0002-9786-3130; Pervan, Petar/0000-0002-0273-2737; Siber, Antonio/0000-0003-1665-6541; NR 41 TC 27 Z9 27 U1 0 U2 4 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 15 PY 2001 VL 64 IS 8 AR 085411 DI 10.1103/PhysRevB.64.085411 PG 9 WC Physics, Condensed Matter SC Physics GA 466AW UT WOS:000170623000094 ER PT J AU Magri, R Zunger, A AF Magri, R Zunger, A TI Effects of interfacial atomic segregation on optical properties of InAs/GaSb superlattices SO PHYSICAL REVIEW B LA English DT Article ID HETEROSTRUCTURES AB Largely because of the lack of detailed microscopic information on the interfacial morphology, most electronic structure calculations on superlattices and quantum wells assume abrupt interfaces. Cross-sectional scanning tunneling microscopy (STM) measurements have now resolved atomic features of segregated interfaces. We fit a layer-by-layer growth model to the observed STM profiles, extracting surface-to-subsurface atomic exchange energies. These are then used to obtain a detailed simulated model of segregated InAs/GaSb superlattices with atomic resolution. Applying pseudopotential calculations to such structures reveals remarkable electronic consequences of segregation, including a blueshift of interband transitions, lowering of polarization anisotropy, and reduction of the amplitude of heavy-hole wave functions at the inverted interface. C1 Univ Modena & Reggio Emilia, Ist Nazl Fis Mat, Modena, Italy. Univ Modena & Reggio Emilia, Dipartimento Fis, Modena, Italy. Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Magri, R (reprint author), Univ Modena & Reggio Emilia, Ist Nazl Fis Mat, Modena, Italy. RI Zunger, Alex/A-6733-2013; Magri, Rita/O-5267-2016 OI Magri, Rita/0000-0003-2945-0374 NR 17 TC 31 Z9 32 U1 1 U2 7 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 2001 VL 64 IS 8 AR 081305 DI 10.1103/PhysRevB.64.081305 PG 4 WC Physics, Condensed Matter SC Physics GA 466AW UT WOS:000170623000010 ER PT J AU Migas, DB Miglio, L Henrion, W Rebien, M Marabelli, F Cook, BA Shaposhnikov, VL Borisenko, VE AF Migas, DB Miglio, L Henrion, W Rebien, M Marabelli, F Cook, BA Shaposhnikov, VL Borisenko, VE TI Electronic and optical properties of isostructural beta-FeSi2 and OsSi2 SO PHYSICAL REVIEW B LA English DT Article ID SEMICONDUCTING IRON DISILICIDE; LIGHT-EMITTING DIODE; ION-BEAM SYNTHESIS; SINGLE-CRYSTALS; THIN-FILMS; MU-M; HOLE EXCITATIONS; BAND-GAP; SI; FESI2 AB We present both theoretical and experimental investigations of electronic and optical properties of isostructural beta -FeSi2 and OsSi2 by means of a full-potential linear augmented plane wave method and optical measurements. We report also ellipsometric and reflectance measurements on samples of polycrystalline osmium disilicide prepared by mechanical alloying. From ab initio calculations these compounds are found to be indirect band-gap semiconductors with the fundamental gap of OsSi2 larger some 0.3-0.4 eV than the one of beta -FeSi2. In addition to that, a low value of the oscillator strength is predicted for the first direct transitions in both cases. Computed optical functions for these materials were compared to the ones deduced from optical measurements, indicating very good agreement and the presence of some anisotropic effects. C1 Univ Milano Bicocca, INFM, I-20125 Milan, Italy. Univ Milano Bicocca, Dipartimento Sci Mat, I-20125 Milan, Italy. Hahn Meitner Inst Kernforsch Berlin GmbH, D-12489 Berlin, Germany. Univ Pavia, INFM, I-27100 Pavia, Italy. Univ Pavia, Dipartimento Fis A Volta, I-27100 Pavia, Italy. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Belarusian State Univ Informat & Radioelect, Minsk 220013, Byelarus. RP Migas, DB (reprint author), Univ Milano Bicocca, INFM, Via Cozzi 53, I-20125 Milan, Italy. NR 43 TC 30 Z9 31 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 15 PY 2001 VL 64 IS 7 AR 075208 PG 7 WC Physics, Condensed Matter SC Physics GA 463WU UT WOS:000170500900057 ER PT J AU Montalenti, F Voter, AF AF Montalenti, F Voter, AF TI Normal-incidence steering effect in crystal growth: Ag/Ag(100) SO PHYSICAL REVIEW B LA English DT Article ID THIN-FILM GROWTH; MOLECULAR-DYNAMICS SIMULATION; GRAZING-INCIDENCE; METAL-DEPOSITION; TEMPERATURE; SCATTERING; SURFACES; ATOMS AB During crystal growth by vapor deposition, normal incident atoms are deflected toward three-dimensional surface structures. The effect becomes strong when the atoms are deposited with a low initial kinetic energy. At low T this steering effect induces an instability in the growth process, causing a perfectly flat surface to become rough after a few monolayers are deposited. Quantitative results for the initial stages of growth of Ag/Ag(100) at T similar to0 K are presented. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Montalenti, F (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM montalenti@tl2.lanl.gov RI Montalenti, Francesco/A-7738-2010 OI Montalenti, Francesco/0000-0001-7854-8269 NR 19 TC 42 Z9 42 U1 1 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 15 PY 2001 VL 64 IS 8 AR 081401 DI 10.1103/PhysRevB.64.081401 PG 4 WC Physics, Condensed Matter SC Physics GA 466AW UT WOS:000170623000016 ER PT J AU Ocko, M Drobac, D Sarrao, JL Fisk, Z AF Ocko, M Drobac, D Sarrao, JL Fisk, Z TI Thermopower of YbIn1-xAgCu4 alloys (x <= 0.275) SO PHYSICAL REVIEW B LA English DT Article ID TRANSPORT-PROPERTIES; PHASE-TRANSITION AB We report results of thermopower measurements of the YbIn1-xAgxCu4 alloys (x = 0, 0.15, and 0.275) and of the nonmagnetic LuInCu4 compound. The thermopower investigations are complemented by resistivity and ac-susceptibility measurements. The results are explained within a two-phase model with different characteristic temperatures. For x = 0.15, one can observe Fermi liquid behavior up to 20 K: the - a T-1 dependence of the thermopower and the rho (01) + b(1)T(2) dependence of the resistivity. For higher temperatures approaching the valence transition temperature T-v, the resistivity can be described by rho (02) + b(2) T-3, while the thermopower is again proportional to T. Similar trends are observed for other values of x as well. C1 Univ Zagreb, Inst Phys, Zagreb 10000, Croatia. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Natl High Magnet Field Lab, Tallahassee, FL 32306 USA. RP Ocko, M (reprint author), Univ Zagreb, Inst Phys, PP 304, Zagreb 10000, Croatia. NR 13 TC 11 Z9 11 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 2001 VL 64 IS 8 AR 085103 PG 5 WC Physics, Condensed Matter SC Physics GA 466AW UT WOS:000170623000022 ER PT J AU Perebeinos, V Allen, PB AF Perebeinos, V Allen, PB TI Multiphonon resonant Raman scattering predicted in LaMnO3 from the Franck-Condon process via self-trapped excitons SO PHYSICAL REVIEW B LA English DT Article ID JAHN-TELLER TRANSITION; ELECTRONIC-STRUCTURE; PHOTOEMISSION SPECTRA; OPTICAL-CONDUCTIVITY; LAYERED MANGANITES; MATRIX-ELEMENTS; GROUND-STATE; PSEUDOPOTENTIALS; LA1-XCAXMNO3; EXCITATIONS AB Resonant behavior of the Raman process is predicted when the laser frequency is close to the orbital excitation energy of LaMnO3 at 2 eV. The incident photon creates a vibrationally excited self-trapped "orbiton" state from the orbitally ordered Jahn-Teller (JT) ground state. Trapping occurs by local oxygen rearrangement. Then the Franck-Condon mechanism activates multiphonon Raman scattering. The amplitude of the n-phonon process is first order in the electron-phonon coupling g. The resonance occurs via a dipole forbidden d to d transition. We previously suggested that this transition (also seen in optical reflectivity) becomes allowed because of asymmetric oxygen fluctuations. Here we calculate the magnitude of the corresponding matrix element using local spin-density functional theory, This calculation agrees to better than a factor of two with our previous value extracted from experiment. This allows us to calculate the absolute value of the Raman tensor for multiphonon scattering. Observation of this effect would be a direct confirmation of the importance of the JT electron-phonon term and the presence of self-trapped orbital excitons, or "orbitons." C1 SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA. RP Perebeinos, V (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. NR 59 TC 32 Z9 33 U1 2 U2 11 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 15 PY 2001 VL 64 IS 8 AR 085118 DI 10.1103/PhysRevB.64.085118 PG 6 WC Physics, Condensed Matter SC Physics GA 466AW UT WOS:000170623000037 ER PT J AU Sato, T Kumigashira, H Ionel, D Takahashi, T Hase, I Ding, H Campuzano, JC Shamoto, S AF Sato, T Kumigashira, H Ionel, D Takahashi, T Hase, I Ding, H Campuzano, JC Shamoto, S TI Evolution of metallic states from the Hubbard band in the two-dimensional Mott system BaCo1-xNixS2 SO PHYSICAL REVIEW B LA English DT Article ID SINGLE-CRYSTAL GROWTH; INSULATOR TRANSITIONS; ELECTRONIC-STRUCTURE; FERMI-SURFACE; TRANSPORT; BANIS2; PHOTOEMISSION; PHASE AB We report angle-resolved photoemission spectroscopy on the layered Mott system BaCo1-xNixS2. (x = 0.18, 0.28) across the phase transition from the antiferromagnetic insulator to anomalous metal. We found that the lower Hubbard band in the insulating phase possesses a remnant of the Fermi surface in the metallic phase and gradually evolves into the metallic bands with carrier doping. We compare the experimental result with those of the high-T-c cuprates to discuss the absence of superconductivity in BaCo1-xNixS2. C1 Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan. Electrotech Lab, Tsukuba, Ibaraki 3058568, Japan. Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA. Univ Illinois, Dept Phys, Chicago, IL 60607 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Tohoku Univ, Dept Appl Phys, Sendai, Miyagi 9808579, Japan. RP Sato, T (reprint author), Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan. RI Sato, Takafumi/E-5094-2010; Tohoku, Arpes/A-4890-2010; Takahashi, Takashi/E-5080-2010 NR 21 TC 3 Z9 3 U1 1 U2 6 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 15 PY 2001 VL 64 IS 7 AR 075103 DI 10.1103/PhysRevB.64.075103 PG 6 WC Physics, Condensed Matter SC Physics GA 463WU UT WOS:000170500900033 ER PT J AU Turchi, PEA Mayou, D AF Turchi, PEA Mayou, D TI Real-space electronic structure approach to transport in alloys SO PHYSICAL REVIEW B LA English DT Article ID COHERENT-POTENTIAL APPROXIMATION; CONTINUED-FRACTION COEFFICIENTS AB We present a method for calculating dc and ac conductivities of alloys in the framework of a tight-binding description of their electronic structure. The method is entirely derived in real space, and thus requires no spatial symmetry of the underlying lattice on which the alloy is based. It also allows a calculation of conductivity in alloy cases where the chemical randomness is treated within the coherent potential approximation. Applications to simple model systems are given to illustrate the basic features, the advantages, and the range of applicability of the method. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. LEPES, CNRS, F-38042 Grenoble 9, France. RP Turchi, PEA (reprint author), Lawrence Livermore Natl Lab, L-353,POB 808, Livermore, CA 94551 USA. NR 21 TC 1 Z9 1 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 2001 VL 64 IS 7 AR 075113 PG 9 WC Physics, Condensed Matter SC Physics GA 463WU UT WOS:000170500900043 ER PT J AU Turchi, PEA Gonis, A Drchal, V Kudrnovsky, J AF Turchi, PEA Gonis, A Drchal, V Kudrnovsky, J TI First-principles study of stability and local order in substitutional Ta-W alloys SO PHYSICAL REVIEW B LA English DT Article ID X-RAY-SCATTERING; BINARY-ALLOYS; GROUND-STATE; ENERGIES; TRANSFORMATIONS; SYSTEMS AB A parameter-free electronic structure approach is applied to the study of stability and chemical order in substitutional bcc-based Ta-W alloys. The method is based on a Green's function description of the electronic structure of the random alloys. Configurational order is treated within the generalized perturbation method, and temperature effects are examined with a generalized mean-field approach. In contrast to the results summarized in the assessed phase diagram, an unambiguous tendency toward order with a B2 superstructure in a broad range of alloy composition is predicted. The details of the thermodynamics analysis, phase diagram, and short-range order are given for Ta-W alloys as a function of temperature and concentration. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Acad Sci Czech Republ, Inst Phys, CZ-18040 Prague 8, Czech Republic. RP Turchi, PEA (reprint author), Lawrence Livermore Natl Lab, L-353,POB 808, Livermore, CA 94551 USA. RI KUDRNOVSKY, Josef/G-5581-2014; Drchal, Vaclav/G-6259-2014 OI KUDRNOVSKY, Josef/0000-0002-9968-6748; Drchal, Vaclav/0000-0002-6628-7417 NR 30 TC 26 Z9 27 U1 0 U2 5 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 15 PY 2001 VL 64 IS 8 AR 085112 DI 10.1103/PhysRevB.64.085112 PG 8 WC Physics, Condensed Matter SC Physics GA 466AW UT WOS:000170623000031 ER PT J AU Wu, J Shan, W Walukiewicz, W Yu, KM Ager, JW Haller, EE Xin, HP Tu, CW AF Wu, J Shan, W Walukiewicz, W Yu, KM Ager, JW Haller, EE Xin, HP Tu, CW TI Effect of band anticrossing on the optical transitions in GaAs1-xNx/GaAs multiple quantum wells SO PHYSICAL REVIEW B LA English DT Article ID NITROGEN-INDUCED INCREASE; GAINNAS ALLOYS; LASER-DIODES; GAAS; ABSORPTION; LUMINESCENCE; GANAS/GAAS; GANXAS1-X; GAP AB Interband transitions in GaAs1-xNx/GaAs multiple quantum wells were studied at room temperature by photomodulated reflectance spectroscopy as a function of well width (3-9 nm). the nitrogen concentration (0.012 p+p+e(-) interactions produced by B-8 solar neutrinos at the sudbury neutrino observatory SO PHYSICAL REVIEW LETTERS LA English DT Article ID RADIATIVE-CORRECTIONS; REAL-TIME; SCATTERING; KAMIOKANDE; DETECTOR AB Solar neutrinos from B-8 decay have been detected at the Sudbury Neutrino Observatory via the charged current (CC) reaction on deuterium and the elastic scattering (ES) of electrons. The flux of nu (e)'s is measured by the CC reaction rate to be phi (CC)(nu (e)) = 1.75 +/-0.07(stat)(-0.11)(+0.12)(syst) +/-0.05(theor) x 10(6) cm(-2) s(-1). Comparison of phi (CC)(nu (e)) to the Super-Kamiokande Collaboration's precision value of the flux inferred from the ES reaction yields a 3.3o sigma difference, assuming the systematic uncertainties are normally distributed, providing evidence of an active non=nu (e) component in the solar flux. The total flux of active B-8 neutrinos is determined to be 5.44 +/-0.99 x 10(6) cm(-2) s(-1). C1 Univ Washington, Ctr Expt Nucl Phys & Astrophys, Seattle, WA 98195 USA. Atom Energy Canada Ltd, Chalk River Nucl Labs, Chalk River, ON K0J 1J0, Canada. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. Carleton Univ, Ottawa, ON K1S 5B6, Canada. Laurentian Univ, Dept Phys & Astron, Sudbury, ON P3E 2C6, Canada. Univ Calif Berkeley, Lawrence Berkeley Lab, Inst Nucl & Particle Astrophys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Natl Res Council Canada, Ottawa, ON K1A 0R6, Canada. Princeton Univ, Dept Phys, Princeton, NJ 08544 USA. Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada. Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada. Univ Calif Irvine, Dept Phys, Irvine, CA 92717 USA. Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada. Univ Oxford, Nucl & Astrophys Lab, Oxford OX1 3RH, England. Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA. Univ Washington, Dept Phys, Seattle, WA 98195 USA. Univ London Birkbeck Coll, London WC1E 7HX, England. TRIUMF, Vancouver, BC V6T 2A3, Canada. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. Univ Sussex, Dept Phys & Astron, Brighton BN1 9QH, E Sussex, England. RP Univ Washington, Ctr Expt Nucl Phys & Astrophys, Seattle, WA 98195 USA. RI Kirch, Klaus/A-4601-2010; Hallin, Aksel/H-5881-2011; Frank, Edward/A-8865-2012; Kyba, Christopher/I-2014-2012; Dai, Xiongxin/I-3819-2013; Orrell, John/E-9313-2015 OI Kyba, Christopher/0000-0001-7014-1843; Orrell, John/0000-0001-7968-4051 NR 32 TC 1351 Z9 1354 U1 7 U2 46 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 AUG 13 PY 2001 VL 87 IS 7 AR 071301 DI 10.1103/PhysRevLett.87.071301 PG 6 WC Physics, Multidisciplinary SC Physics GA 463LU UT WOS:000170478300005 PM 11497878 ER PT J AU Alavi-Harati, A Alexopoulos, T Arenton, M Arisaka, K Averitte, S Barker, AR Bellantoni, L Bellavance, A Belz, J Ben-David, R Bergman, DR Blucher, E Bock, GJ Bown, C Bright, S Chen, E Childress, S Coleman, R Corcoran, MD Corti, G Cox, B Crisler, MB Erwin, AR Ford, R Glazov, A Golossanov, A Graham, G Graham, J Hagan, K Halkiadakis, E Hamm, J Hanagaki, K Hidaka, S Hsiung, YB Jejer, V Jensen, DA Kessler, R Kobrak, HGE LaDue, J Lath, A Ledovskoy, A McBride, PL Mikelsons, P Monnier, E Nakaya, T Nelson, KS Nguyen, H O'Dell, V Pang, M Pordes, R Prasad, V Quinn, B Ramberg, EJ Ray, RE Roodman, A Sadamoto, M Schnetzer, S Senyo, K Shanahan, P Shawhan, PS Shields, J Slater, W Solomey, N Somalwar, SV Stone, RL Swallow, EC Taegar, SA Tesarek, RJ Thomson, GB Toale, PA Tripathi, A Tschirhart, R Turner, SE Wah, YW Wang, J White, HB Whitmore, J Winstein, B Winston, R Yamanaka, T Zimmerman, ED AF Alavi-Harati, A Alexopoulos, T Arenton, M Arisaka, K Averitte, S Barker, AR Bellantoni, L Bellavance, A Belz, J Ben-David, R Bergman, DR Blucher, E Bock, GJ Bown, C Bright, S Chen, E Childress, S Coleman, R Corcoran, MD Corti, G Cox, B Crisler, MB Erwin, AR Ford, R Glazov, A Golossanov, A Graham, G Graham, J Hagan, K Halkiadakis, E Hamm, J Hanagaki, K Hidaka, S Hsiung, YB Jejer, V Jensen, DA Kessler, R Kobrak, HGE LaDue, J Lath, A Ledovskoy, A McBride, PL Mikelsons, P Monnier, E Nakaya, T Nelson, KS Nguyen, H O'Dell, V Pang, M Pordes, R Prasad, V Quinn, B Ramberg, EJ Ray, RE Roodman, A Sadamoto, M Schnetzer, S Senyo, K Shanahan, P Shawhan, PS Shields, J Slater, W Solomey, N Somalwar, SV Stone, RL Swallow, EC Taegar, SA Tesarek, RJ Thomson, GB Toale, PA Tripathi, A Tschirhart, R Turner, SE Wah, YW Wang, J White, HB Whitmore, J Winstein, B Winston, R Yamanaka, T Zimmerman, ED CA KTeV Collaboration TI Measurement of the branching ratio and form factor of K-L -> mu(+) mu(-) gamma SO PHYSICAL REVIEW LETTERS LA English DT Article ID DECAY-RATE; KL->E+E-GAMMA AB We report on the analysis of the rare decay K-L--> mu (+)mu (-)gamma the 1997 data from the KTeV experiment at Fermilab. A total of 9327 candidate events are observed with 2.4% background, representing a factor of 40 increase in statistics over the current world sample. We find that B(K-L --> mu (+)mu (-)gamma) = (3.62 +/-0.04(stat)+/-0.08(syst)) x 10(-7). The form factor parameter alpha (K*) is measured to be alpha (K*) = -0.160(-0.028)(+0.026). In addition, we make the first measurement of the parameter alpha from the D'Ambrosio-Isidori-Portoles form factor, finding alpha = -1.54 +/-0.10. In that model, this alpha measurement limits the Cabibbo-Kobayashi-Maskawa parameter rho > -0.2. C1 Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Univ Arizona, Tucson, AZ 85721 USA. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Colorado, Boulder, CO 80309 USA. Elmhurst Coll, Elmhurst, IL 60126 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Osaka Univ, Osaka 5600043, Japan. Rice Univ, Houston, TX 77005 USA. Rutgers State Univ, Piscataway, NJ 08854 USA. Univ Virginia, Dept Phys, Charlottesville, VA 22901 USA. Univ Virginia, Inst Nucl & Particle Phys, Charlottesville, VA 22901 USA. Univ Wisconsin, Madison, WI 53706 USA. RP Quinn, B (reprint author), Univ Chicago, Enrico Fermi Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA. NR 20 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 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 13 PY 2001 VL 87 IS 7 AR 071801 DI 10.1103/PhysRevLett.87.071801 PG 4 WC Physics, Multidisciplinary SC Physics GA 463LU UT WOS:000170478300006 ER PT J AU Formaggio, JA Yu, J Adams, T Alton, A Avvakumov, S de Barbaro, L de Barbaro, P Bernstein, RH Bodek, A Bolton, T Brau, J Buchholz, D Budd, H Bugel, L Conrad, JM Drucker, RB Fleming, BT Foster, J Frey, R Goldman, J Goncharov, M Harris, DA Johnson, RA Kim, JH Koutsoliotas, S Lamm, MJ Marsh, W Mason, D McDonald, J McFarland, KS McNulty, C Naples, D Nienaber, P Romosan, A Sakumoto, WK Schellman, HM Shaevitz, MH Spentzouris, P Stern, EG Suwonjandee, N Vakili, M Vaitaitis, A Yang, UK Zeller, GP Zimmerman, ED AF Formaggio, JA Yu, J Adams, T Alton, A Avvakumov, S de Barbaro, L de Barbaro, P Bernstein, RH Bodek, A Bolton, T Brau, J Buchholz, D Budd, H Bugel, L Conrad, JM Drucker, RB Fleming, BT Foster, J Frey, R Goldman, J Goncharov, M Harris, DA Johnson, RA Kim, JH Koutsoliotas, S Lamm, MJ Marsh, W Mason, D McDonald, J McFarland, KS McNulty, C Naples, D Nienaber, P Romosan, A Sakumoto, WK Schellman, HM Shaevitz, MH Spentzouris, P Stern, EG Suwonjandee, N Vakili, M Vaitaitis, A Yang, UK Zeller, GP Zimmerman, ED TI Search for the lepton family number violating process (nu)over-bar(mu)e(-)->mu(-)(nu)over-bar(e) SO PHYSICAL REVIEW LETTERS LA English DT Article ID SINGLE PION-PRODUCTION; ANTIMUONIUM CONVERSION; MUON DECAY; NEUTRINO; CALIBRATION; CALORIMETER; LIMITS AB The NuTeV experiment at Fermilab has used a sign-selected neutrino beam to perform a search for the lepton number violating process <()over bar>(mu)e(-) --> mu-<()over bar>(e), and to measure the cross section of the standard model inverse muon decay process nu (mu)e --> mu-nu (e). NuTeV measures the inverse muon decay asymptotic cross-section slope sigma /E to be (13.8 +/-1.2 +/-1.4) x 10(-42) cm(2)/GeV. The experiment also observes no evidence for lepton number violation and places one of the most restrictive limits on the cross-section ratio sigma(<()over bar>(mu)e(-)--> mu-<()over bar>(e))/sigma(nu (mu)e(-)--> mu (-)nu (e)) less than or equal to1.7% at 90% C.L. for V-A couplings and less than or equal to0.6% for scalar couplings. C1 Columbia Univ, New York, NY 10027 USA. Univ Cincinnati, Cincinnati, OH 45221 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Kansas State Univ, Manhattan, KS 66506 USA. Northwestern Univ, Evanston, IL 60208 USA. Univ Oregon, Eugene, OR 97403 USA. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Univ Rochester, Rochester, NY 14627 USA. RP Formaggio, JA (reprint author), Columbia Univ, New York, NY 10027 USA. RI Frey, Raymond/E-2830-2016 OI Frey, Raymond/0000-0003-0341-2636 NR 23 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 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 13 PY 2001 VL 87 IS 7 AR 071803 DI 10.1103/PhysRevLett.87.071803 PG 4 WC Physics, Multidisciplinary SC Physics GA 463LU UT WOS:000170478300008 PM 11497881 ER PT J AU Ginocchio, JN Leviatan, A AF Ginocchio, JN Leviatan, A TI Test of nuclear wave functions for pseudospin symmetry SO PHYSICAL REVIEW LETTERS LA English DT Article ID ALIGNMENT; STATES AB Using the fact that pseudospin is an approximate symmetry of the Dirac Hamiltonian with realistic scalar and vector mean fields, we derive the wave functions of the pseudospin partners of eigenstates of a realistic Dirac Hamiltonian and compare these wave functions with the wave functions of the Dirac eigenstates. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel. RP Ginocchio, JN (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. NR 16 TC 60 Z9 61 U1 1 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 13 PY 2001 VL 87 IS 7 AR 072502 DI 10.1103/PhysRevLett.87.072502 PG 4 WC Physics, Multidisciplinary SC Physics GA 463LU UT WOS:000170478300013 PM 11497886 ER PT J AU Jhi, SH Louie, SG Cohen, ML Morris, JW AF Jhi, SH Louie, SG Cohen, ML Morris, JW TI Mechanical instability and ideal shear strength of transition metal carbides and nitrides SO PHYSICAL REVIEW LETTERS LA English DT Article ID STABILITY; HARDNESS AB The ideal shear strength of transition metal carbides and nitrides is calculated with the use of the ab initio pseudopotential density functional method. The microscopic mechanism that limits the ideal strength is studied using full atomic and structural relaxation and the results of electronic structure calculations. It is shown that plasticity in perfect crystals can be triggered by electronic instabilities at finite strains. Our study explicitly demonstrates that the ideal strength in these materials is limited by the elastic instability which is in turn initiated by electronic instabilities. The potential application of alloy hardening due to the onset of instabilities at different strains is also discussed. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Mat Sci & Mineral Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. NR 22 TC 77 Z9 78 U1 2 U2 18 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 AUG 13 PY 2001 VL 87 IS 7 AR 075503 DI 10.1103/PhysRevLett.87.075503 PG 4 WC Physics, Multidisciplinary SC Physics GA 463LU UT WOS:000170478300026 PM 11497899 ER PT J AU McQueeney, RJ Sarrao, JL Pagliuso, PG Stephens, PW Osborn, R AF McQueeney, RJ Sarrao, JL Pagliuso, PG Stephens, PW Osborn, R TI Mixed lattice and electronic states in high-temperature superconductors SO PHYSICAL REVIEW LETTERS LA English DT Article ID PHONON ANOMALIES; CUPRATE OXIDES; BI2SR2CACU2O8+DELTA; LA2-XSRXCUO4; DISPERSION; LA1.85SR0.15CUO4; TRANSITION AB Inelastic neutron scattering measurements are presented which show the abrupt development of new oxygen lattice vibrations near the doping-induced metal-insulator transition in La2-xSrxCuO4. A direct correlation is established between these lattice modes and the electronic susceptibility (as measured by photoemission) inferring that such modes mix strongly with charge fluctuations. This electron-lattice coupling can be characterized as a localized one-dimensional response of the lattice to short-ranged metallic charge fluctuations. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM mcqueeney@lanl.gov RI Osborn, Raymond/E-8676-2011; McQueeney, Robert/A-2864-2016; Pagliuso, Pascoal/C-9169-2012 OI Osborn, Raymond/0000-0001-9565-3140; McQueeney, Robert/0000-0003-0718-5602; NR 25 TC 106 Z9 106 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 13 PY 2001 VL 87 IS 7 AR 077001 DI 10.1103/PhysRevLett.87.077001 PG 4 WC Physics, Multidisciplinary SC Physics GA 463LU UT WOS:000170478300035 PM 11497908 ER PT J AU Retsch, CC McNulty, I AF Retsch, CC McNulty, I TI X-ray speckle contrast variation across absorption edges SO PHYSICAL REVIEW LETTERS LA English DT Article ID SMECTIC-A FILMS; SCATTERING AB We measured static x-ray speckle contrast variation with the incident photon energy across a sample-specific absorption edge. In this paper, we present a theoretical description of this energy dependency consistent with our data. We found that the contrast depends mainly on the imaginary part of the complex index of refraction in the sample, as well as on the instrumental resolution. The speckle contrast decreases as the absorption cross section in the sample increases at the absorption edge. This result is not predicted by commonly used theory. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Retsch, CC (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 21 TC 8 Z9 8 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 13 PY 2001 VL 87 IS 7 AR 077401 DI 10.1103/PhysRevLett.87.077401 PG 4 WC Physics, Multidisciplinary SC Physics GA 463LU UT WOS:000170478300041 PM 11497914 ER PT J AU Szczepaniak, AP Swanson, ES AF Szczepaniak, AP Swanson, ES TI Chiral extrapolation, renormalization, and the viability of the quark model SO PHYSICAL REVIEW LETTERS LA English DT Article ID PERTURBATION-THEORY; CONDENSED VACUUM; NUCLEAR-FORCES; LATTICE QCD; SYMMETRY; LAGRANGIANS; HADRONS; MASSES; MESONS AB The relationship of the quark model to the known chiral properties of QCD is a long-standing problem in the interpretation of low-energy QCD. In particular, how can the pion be viewed as both a collective Goldstone-boson quasiparticle and as a valence-quark-antiquark bound state? A comparison of the many-body solution of a simplified model of QCD to the constituent-quark model demonstrates that the quark model is sufficiently flexible to describe meson hyperfine splitting provided proper renormalization conditions and correct degrees of freedom are employed consistently. C1 Indiana Univ, Dept Phys, Bloomington, IN 47405 USA. Indiana Univ, Ctr Nucl Theory, Bloomington, IN 47405 USA. Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA. Jefferson Lab, Newport News, VA 23606 USA. RP Szczepaniak, AP (reprint author), Indiana Univ, Dept Phys, Bloomington, IN 47405 USA. NR 27 TC 32 Z9 32 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 AUG 13 PY 2001 VL 87 IS 7 AR 072001 DI 10.1103/PhysRevLett.87.072001 PG 4 WC Physics, Multidisciplinary SC Physics GA 463LU UT WOS:000170478300011 PM 11497884 ER PT J AU Wang, ZL Farris, GM Newman, LS Shou, YL Maier, LA Smith, HN Marrone, BL AF Wang, ZL Farris, GM Newman, LS Shou, YL Maier, LA Smith, HN Marrone, BL TI Beryllium sensitivity is linked to HLA-DP genotype SO TOXICOLOGY LA English DT Article DE beryllium; chronic beryllium disease; immune response; genetic susceptibility; lymphocyte proliferation test; HLA-DP alleles ID LYMPHOCYTE-PROLIFERATION TEST; T-CELLS; DISEASE; IMMUNOGENETICS; EXPOSURE; ALLELES AB Chronic beryllium disease (CBD) appears to arise from a combination of both exposure and genetic risk factors. A distinguishing feature of CBD is beryllium hypersensitivity. which can be measured in vitro by a lymphocyte proliferation test. The objective of this study was to determine whether certain allelic variations of the HLA-DPB1 gene, which had been observed previously in CBD, could be found in a group of individuals having beryllium hypersensitivity, but no symptoms of CBD. A flow cytometry-based Lymphocyte Proliferation Test combined with immunophenotyping (Immuno-LPT) was used to detect CD4+ and CD8+ T cell proliferation in response to in vitro stimulation with beryllium. The HLA-DPB1 haplotypes of the same individuals were determined by automated DNA sequencing. Twenty-two out of 25 beryllium-sensitive, non-CBD individuals were found to be carriers of the HLA-DPB1 gene having a substitution of a glutamic acid at position 69 in Exon 2 (Glu69). and a significantly high percentage (24%) were Glu69 homozygotes. Most of the CD4+ responders on the Immuno-LPT (10/14) carried rare, non-*0201 Glu69 DPB1 alleles: while most or the non-CD4+ responders (9/11) were common Glu69 carriers (*0201 or *0202) or non-Glu69 individuals (non-Glu69/non-Glu69). This is the first direct evidence that HLA-DP genotype is linked to a phenotypic response that Occurs in beryllium sensitization in the absence of clinical CBD. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved. C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. Natl Jewish Med & Res Ctr, Denver, CO USA. Univ Colorado, Hlth Sci Ctr, Denver, CO USA. RP Marrone, BL (reprint author), Los Alamos Natl Lab, Biosci Div, B-2,M888, Los Alamos, NM 87545 USA. FU NCRR NIH HHS [M01 RR 00051, P41-RR013150]; NHLBI NIH HHS [K08 HL-03887]; NIEHS NIH HHS [ES-06538] NR 22 TC 55 Z9 56 U1 0 U2 2 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0300-483X J9 TOXICOLOGY JI Toxicology PD AUG 13 PY 2001 VL 165 IS 1 BP 27 EP 38 DI 10.1016/S0300-483X(01)00410-3 PG 12 WC Pharmacology & Pharmacy; Toxicology SC Pharmacology & Pharmacy; Toxicology GA 465KB UT WOS:000170587200003 PM 11551429 ER PT J AU Stevens, R Lacy, M AF Stevens, R Lacy, M TI Two-colour photometric selection of high-redshift galaxies SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE galaxies : distances and redshifts; galaxies : formation; galaxies : fundamental parameters; galaxies : photometry ID LYMAN-BREAK GALAXIES; LOW-MASS STARS; STELLAR MODELS; SPECTRAL EVOLUTION; STANDARD STARS; FIELD; LIMIT; ULTRAVIOLET; COUNTS; GRIDS AB In this paper we describe a set of models to predict the colours of galaxies over a wide range of redshifts. We present examples of output from the simulations, and discuss their application to the selection of galaxies at high redshifts, particularly through identification of the Lyman break. Additionally we consider the optimal choices of filters for selection at a range of redshifts. An interface to a subset of the simulations has been made available on the World Wide Web for the benefit of the community at the location http://www-astro.physics.ox.ac.uk/similar to rejs/ research/galcols.html/. C1 Univ Oxford, Dept Phys, Oxford OX1 3RH, England. Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. RP Stevens, R (reprint author), Univ Oxford, Comp Serv, 13 Banbury Rd, Oxford OX2 6NN, England. NR 34 TC 4 Z9 4 U1 0 U2 0 PU BLACKWELL SCIENCE LTD PI OXFORD PA P O BOX 88, OSNEY MEAD, OXFORD OX2 0NE, OXON, ENGLAND SN 0035-8711 J9 MON NOT R ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD AUG 11 PY 2001 VL 325 IS 3 BP 897 EP 906 DI 10.1046/j.1365-8711.2001.04475.x PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 466VG UT WOS:000170666400001 ER PT J AU Gao, F Trask, SA Hui, HX Mamaeva, O Chen, YL Theodore, TS Foley, BT Korber, BT Shaw, GM Hahn, BH AF Gao, F Trask, SA Hui, HX Mamaeva, O Chen, YL Theodore, TS Foley, BT Korber, BT Shaw, GM Hahn, BH TI Molecular characterization of a highly divergent HIV type 1 isolate obtained early in the AIDS epidemic from the Democratic Republic of Congo SO AIDS RESEARCH AND HUMAN RETROVIRUSES LA English DT Article ID ACQUIRED IMMUNODEFICIENCY SYNDROME; ORIGIN AB Numerous complete human immunodeficiency virus type 1 (HIV-1) genomes have been characterized for contemporary viruses, but few isolates obtained early in the HIV-1 epidemic have been studied. In this article, we describe the molecular characterization of an HIV-1 isolate (83CD003) that was obtained from an AIDS patient in Kinshasa, Democratic Republic of Congo (DRC) in 1983. The complete 83CD003 genome was sequenced in its entirety and found to encode uninterrupted open reading frames for all viral genes. Phylogenetic analysis revealed that 83CD003 was a member of the major (M) group of HIV-1, but did not group with any of the known subtypes. Rather, it formed an independent lineage in all regions of its genome that was roughly equidistant from representatives of all other subtypes. Similarly, 83CD003 also did not cluster with any of several unclassified group M sequences that have been reported more recently to circulate in the DRC, suggesting that it may represent an early group M lineage that is either rare or has gone extinct. The molecular clone of 83CD003 yielded an infectious virus after transfection into mammalian cells and its biological properties can be further studied. C1 Univ Alabama, Dept Med, Birmingham, AL 35294 USA. NIAID, Mol Microbiol Lab, NIH, Bethesda, MD 20892 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Alabama, Howard Hughes Med Inst, Birmingham, AL 35294 USA. Univ Alabama, Dept Microbiol, Birmingham, AL 35294 USA. RP Gao, F (reprint author), Univ Alabama, Dept Med, 701 19th St S,LHRB 639, Birmingham, AL 35294 USA. OI Foley, Brian/0000-0002-1086-0296; Korber, Bette/0000-0002-2026-5757 FU NIAID NIH HHS [N01 AI 85338, P20 AI 27767, R01 AI 40951, UO1 AI 41530] NR 19 TC 11 Z9 12 U1 0 U2 0 PU MARY ANN LIEBERT INC PUBL PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 USA SN 0889-2229 J9 AIDS RES HUM RETROV JI Aids Res. Hum. Retrovir. PD AUG 10 PY 2001 VL 17 IS 12 BP 1217 EP 1222 DI 10.1089/088922201316912826 PG 6 WC Immunology; Infectious Diseases; Virology SC Immunology; Infectious Diseases; Virology GA 464XA UT WOS:000170557600013 PM 11522191 ER PT J AU Silberman, L Dekel, A Eldar, A Zehavi, I AF Silberman, L Dekel, A Eldar, A Zehavi, I TI Cosmological density and power spectrum from peculiar velocities: Nonlinear corrections and principal component analysis SO ASTROPHYSICAL JOURNAL LA English DT Article DE cosmology : observations; cosmology : theory; dark matter; galaxies : clusters : general; galaxies : distances and redshifts; large-scale structure of universe ID TULLY-FISHER RELATION; LARGE-SCALE STRUCTURE; REDSHIFT SURVEY; BACKGROUND-RADIATION; INITIAL FLUCTUATIONS; LIKELIHOOD ANALYSIS; DISTANCE DATA; HUBBLE FLOW; SC GALAXIES; UNIVERSE AB We allow for nonlinear effects in the likelihood analysis of galaxy peculiar velocities and obtain similar to 35% lower values for the cosmological density parameter Omega (m) and for the amplitude of mass density fluctuations sigma (8) Omega (0.6)(m). This result is obtained under the assumption that the power spectrum in the linear regime is of the flat Lambda CDM model (h = 0.65, n = 1, COBE normalized) with only Omega (m) as a free parameter. Since the likelihood is driven by the nonlinear regime, we "break" the power spectrum at k(b) similar to 0.2 (h(-1) Mpc)(-1) and fit a power law at k > k(b). This allows for independent matching of the nonlinear behavior and an unbiased fit in the linear regime. The analysis assumes Gaussian fluctuations and errors and a linear relation between velocity and density. Tests using mock catalogs that properly simulate nonlinear effects demonstrate that this procedure results in a reduced bias and a better fit. We find for the Mark III and SFI data Omega (m) = 0.32 +/- 0.06 and 0.37 +/- 0.09, respectively, with sigma (8) Omega (0.6)(m) = 0.49 +/- 0.06 and 0.63 +/- 0.08, in agreement with constraints from other data. The quoted 90% errors include distance errors and cosmic variance, for fixed values of the other parameters. The improvement in the likelihood due to the nonlinear correction is very significant for Mark III and moderately significant for SFI. When allowing deviations from Lambda CDM, we find an indication for a wiggle in the power spectrum: an excess near k similar to 0.05 (h(-1) Mpc)(-1) and a deficiency at k similar to 0.1 (h(-1) Mpc)(-1), or a "cold flow." This may be related to the wiggle seen in the power spectrum from redshift surveys and the second peak in the cosmic microwave background (CMB) anisotropy. A chi (2) test applied to modes of a principal component analysis (PCA) shows that the nonlinear procedure improves the goodness of fit and reduces a spatial gradient that was of concern in the purely linear analysis. The PCA allows us to address spatial features of the data and to evaluate and fine-tune the theoretical and error models. It demonstrates in particular that the models used are appropriate for the cosmological parameter estimation performed. We address the potential for optimal data compression using PCA. C1 Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel. Fermilab Natl Accelerator Lab, NASA, Fermilab Astrophys Grp, Batavia, IL 60510 USA. RP Silberman, L (reprint author), Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel. NR 72 TC 25 Z9 25 U1 1 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 10 PY 2001 VL 557 IS 1 BP 102 EP 116 DI 10.1086/321663 PN 1 PG 15 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 464XF UT WOS:000170558100010 ER PT J AU Janiuk, A Czerny, B Madejski, GM AF Janiuk, A Czerny, B Madejski, GM TI The nature of the emission components in the quasar/NLS1 PG 1211+143 SO ASTROPHYSICAL JOURNAL LA English DT Article DE accretion, accretion disks; quasars : emission lines; quasars : individual (PG 1211+143); X-rays : galaxies ID ACTIVE GALACTIC NUCLEI; X-RAY VARIABILITY; BLACK-HOLE CANDIDATES; BROAD-LINE REGION; ACCRETION DISKS; ENERGY-DISTRIBUTIONS; ULTRAVIOLET EXCESS; VERTICAL STRUCTURE; BINARY-SYSTEMS; CORONA MODEL AB We present the study of the emission properties of the quasar PG 1211+143, which belongs to the class of narrow line Seyfert 1 galaxies. On the basis of observational data analyzed by us and collected from the literature, we study the temporal and spectral variability of the source in the optical/UV/X-ray bands, and we propose a model that explains the spectrum emitted in this broad energy range. In this model, the intrinsic emission originating in the warm skin of the accretion disk is responsible for the spectral component that is dominant in the softest X-ray range. The shape of reflected spectrum as wen as Fe K line detected in hard X-rays require the reflecting medium to be mildly ionized (xi similar to 500). We identify this reflector with the warm skin of the disk, and we show that the heating of the skin is consistent with the classical alphaP(tot) prescription, while alphaP(gas) option is at least 2 orders of magnitude too low to provide the required heating. We find that the mass of the central black hole is relatively small (M-BH similar to 10(7)-10(8) M.), which is consistent with the broad line region mapping results and characteristic for NLS1 class. C1 Nicolaus Copernicus Astron Ctr, PL-00716 Warsaw, Poland. Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RP Janiuk, A (reprint author), Nicolaus Copernicus Astron Ctr, Bartycka 18, PL-00716 Warsaw, Poland. RI Czerny, Bozena/A-2363-2015 OI Czerny, Bozena/0000-0001-5848-4333 NR 87 TC 25 Z9 26 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 10 PY 2001 VL 557 IS 1 BP 408 EP 420 DI 10.1086/321617 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 464XF UT WOS:000170558100040 ER PT J AU Brown, GV Beiersdorfer, P Chen, H Chen, MH Reed, KJ AF Brown, GV Beiersdorfer, P Chen, H Chen, MH Reed, KJ TI Diagnostic utility of the relative intensity of 3C to 3D in Fe XVII SO ASTROPHYSICAL JOURNAL LA English DT Article DE atomic data; line : identification; stars : coronae; Sun : Corona; Sun : X-rays, gamma rays; X-rays : general ID X-RAY-SPECTRA; INNER-SHELL EXCITATION; LABORATORY MEASUREMENTS; COLLISION STRENGTHS; ELECTRON-BEAM; LINE EMISSION; ACTIVE-REGION; IONS; SPECTROMETER; TRANSMISSION AB The relative intensity R of the resonance and intercombination line in neon-like Fe XVII, located at 15.01 and 15.26 Angstrom, respectively, has been measured at the Lawrence Livermore National Laboratory electron beam ion trap EBIT-II as a function of the relative abundance of sodium-like Fe XVI. Our measurements identify several Fe xvi lines and one Fe XV line in this region. We show that an Fe xvi inner shell satellite line coincides with the intercombination line and can significantly reduce the apparent R. We measure R = 1.90 +/- 0.11 when the relative abundance of Fe XVI to Fe XVII is similar to1. This explains the anomalously low ratios observed in the solar and stellar coronae. The fact that the apparent relative intensity of the resonance and intercombination line in Fe XVII is sensitive to the strength of an Fe XVI inner shell satellite, and therefore, the relative abundance of Fe XVI to Fe XVII, makes the line ratio a diagnostic of temperature. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Brown, GV (reprint author), Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. NR 36 TC 65 Z9 67 U1 0 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 10 PY 2001 VL 557 IS 1 BP L75 EP L78 DI 10.1086/323004 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 464XG UT WOS:000170558200018 ER PT J AU Jung, MH Jaime, M Lacerda, AH Boebinger, GS Kang, WN Kim, HJ Choi, EM Lee, SI AF Jung, MH Jaime, M Lacerda, AH Boebinger, GS Kang, WN Kim, HJ Choi, EM Lee, SI TI Anisotropic superconductivity in epitaxial MgB2 films SO CHEMICAL PHYSICS LETTERS LA English DT Article AB We measure the in-plane electrical resistivity of epitaxial MgB2 thin films in magnetic fields to 60 T and estimate the superconducting upper critical field H-p(c) (0) 24 +/-3 T for field oriented along the c-axis, and H-g(ab)(0)approximate to 30 +/-2 T in the plane of the film. We find the zero-temperature coherence lengths xi (c)(0)approximate to 30 Angstrom and xi (ab)(0)approximate to 37 Angstrom to be shorter than the calculated electronic mean free path l approximate to 100 +/- 50 Angstrom, which places our films in the clean limit. These large upper critical fields make MgB2 a strong candidate for technological applications. (C) 2001 Published by Elsevier Science B.V. C1 Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA. Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea. Pohang Univ Sci & Technol, Natl Creat Res Initiat Ctr Superconduct, Pohang 790784, South Korea. RP Jung, MH (reprint author), Los Alamos Natl Lab, Natl High Magnet Field Lab, MS E536, Los Alamos, NM 87545 USA. RI Jaime, Marcelo/F-3791-2015 OI Jaime, Marcelo/0000-0001-5360-5220 NR 18 TC 79 Z9 80 U1 0 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD AUG 10 PY 2001 VL 343 IS 5-6 BP 447 EP 451 DI 10.1016/S0009-2614(01)00778-3 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 461JH UT WOS:000170360800001 ER PT J AU Lightstone, FC Schwegler, E Hood, RQ Gygi, F Galli, G AF Lightstone, FC Schwegler, E Hood, RQ Gygi, F Galli, G TI A first principles molecular dynamics simulation of the hydrated magnesium ion SO CHEMICAL PHYSICS LETTERS LA English DT Article ID DENSITY-FUNCTIONAL THEORY; X-RAY-DIFFRACTION; NEUTRON-DIFFRACTION; AQUEOUS-SOLUTIONS; AB-INITIO; WATER; ENERGIES; CATIONS; MG2+; SOLVATION AB First principles molecular dynamics has been used to investigate the solvation of Mg2+ in water. In agreement with experiment, we find that the first solvation shell around Mg2+. contains six water molecules in an octahedral arrangement. The electronic structure of first solvation shell water molecules has been examined with a localized orbital analysis. We find that water molecules tend to asymmetrically coordinate Mg2+ through one of the oxygen lone pair orbitals and that the first solvation shell dipole moments increase by 0.2 Debye relative to pure liquid water. (C) 2001 Published by Elsevier Science B.V. C1 Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Livermore, CA 94550 USA. Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94550 USA. RP Lightstone, FC (reprint author), Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Livermore, CA 94550 USA. RI Schwegler, Eric/F-7294-2010; Schwegler, Eric/A-2436-2016 OI Schwegler, Eric/0000-0003-3635-7418 NR 35 TC 122 Z9 123 U1 1 U2 25 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD AUG 10 PY 2001 VL 343 IS 5-6 BP 549 EP 555 DI 10.1016/S0009-2614(01)00735-7 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 461JH UT WOS:000170360800017 ER PT J AU Trugman, SA Bonca, J Ku, LC AF Trugman, SA Bonca, J Ku, LC TI Statics and dynamics of coupled electron-phonon systems SO INTERNATIONAL JOURNAL OF MODERN PHYSICS B LA English DT Article; Proceedings Paper CT International Conference on Strongly Correlated Electron Systems (SCES-Y2K) CY OCT 23-28, 2000 CL CALCUTTA, INDIA ID POLARON; MODEL AB We review recent variational methods that provide extremely accurate solutions for the problem of one and two electrons coupled to dynamical, quantum phonons, including retardation effects. The dynamics of these systems far from equilibrium is explored, including the dynamics of polaron formation after electron injection by an STM. An examination of three-point functions suggests a qualitative modification of the traditional picture of a polaron. Long-range electron-phonon interactions are studied in some generality, including vector and frustrated Frohlich models, and bounds are obtained on the possible mass enhancement. C1 Univ Calif Los Alamos Natl Lab, Div Theory, Los Alamos, NM 87545 USA. Univ Ljubljana, FMF, Ljubljana 1000, Slovenia. Jozef Stefan Inst, Ljubljana 1000, Slovenia. RP Trugman, SA (reprint author), Univ Calif Los Alamos Natl Lab, Div Theory, POB 1663, Los Alamos, NM 87545 USA. NR 23 TC 17 Z9 17 U1 2 U2 4 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 912805, SINGAPORE SN 0217-9792 J9 INT J MOD PHYS B JI Int. J. Mod. Phys. B PD AUG 10 PY 2001 VL 15 IS 19-20 BP 2707 EP 2717 DI 10.1142/S0217979201006483 PG 11 WC Physics, Applied; Physics, Condensed Matter; Physics, Mathematical SC Physics GA 472UW UT WOS:000171004200015 ER PT J AU Chertock, A Levy, D AF Chertock, A Levy, D TI Particle methods for dispersive equations SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article DE particle methods; dispersive equations; diffusion-velocity; dispersion-velocity; compacton equations ID VORTEX METHODS; 3 DIMENSIONS; CONVERGENCE; COMPACTONS; SIMULATIONS; ALGORITHM; DIFFUSION; SCHEME AB We introduce a new dispersion-velocity particle method for approximating solutions of linear and nonlinear dispersive equations. This is the first time in which particle methods are being used for solving such equations. Our method is based on an extension of the diffusion-velocity method of Degond and Mustieles (SIAM J. Sci. Stat. Comput. 11(2), 293 (1990)) to the dispersive framework. The main analytical result we provide is the short time existence and uniqueness of a solution to the resulting dispersion-velocity transport equation. We numerically test our new method for a variety of linear and nonlinear problems. In particular we are interested in nonlinear equations which generate structures that have nonsmooth fronts. Our simulations show that this particle method is capable of capturing the nonlinear regime of a compacton-compacton type interaction. (C) 2001 Academic Press. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Stanford Univ, Dept Math, Stanford, CA 94305 USA. Univ Calif Berkeley, Dept Math, Berkeley, CA 94720 USA. RP Chertock, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RI Chertock, Alina/I-3676-2013 OI Chertock, Alina/0000-0003-4978-1314 NR 39 TC 59 Z9 60 U1 0 U2 2 PU ACADEMIC PRESS INC PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD AUG 10 PY 2001 VL 171 IS 2 BP 708 EP 730 DI 10.1006/jcph.2001.6803 PG 23 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 464AJ UT WOS:000170509800011 ER PT J AU Catlos, EJ Harrison, TM Kohn, MJ Grove, M Ryerson, FJ Manning, CE Upreti, BN AF Catlos, EJ Harrison, TM Kohn, MJ Grove, M Ryerson, FJ Manning, CE Upreti, BN TI Geochronologic and thermobarometric constraints on the evolution of the Main Central Thrust, central Nepal Himalaya SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Review ID P-T PATHS; POSITIONING SYSTEM MEASUREMENTS; LANGTANG-NATIONAL-PARK; BENEATH SOUTHERN TIBET; INVERTED METAMORPHISM; TECTONIC IMPLICATIONS; GRADE METAMORPHISM; THERMAL EVOLUTION; MARSYANDI VALLEY; LESSER HIMALAYA AB The Main Central Thrust (MCT) juxtaposes the high-grade Greater Himalayan Crystallines over the lower-grade Lesser Himalaya Formation; an apparent inverted metamorphic sequence characterizes the shear zone that underlies the thrust. Garnet-bearing assemblages sampled along the Marysandi River and Darondi Khola in the Annapurna region of central Nepal show striking differences in garnet zoning of Mn, Ca, Mg, and Fe above and below the MCT, Thermobarometry of MCT footwall rocks yields apparent inverted temperature and pressure gradients of similar to 18 degreesC km(-1) and similar to0.06 km MPa-1 respectively. Pressure-temperature (P-T) paths calculated for upper Lesser Himalaya samples that preserve prograde compositions show evidence of decompression during heating, whereas garnets from the structurally lower sequences grew during an increase in both pressure and temperature. In situ (i.e., analyzed in thin section) ion microprobe ages of monazites from rocks immediately beneath the Greater Himalayan Crystallines yield ages from 18 to 22 Ma, whereas late Miocene and Pliocene monazite ages characterize rocks within the apparent inverted metamorphic sequence. A Lesser Himalayan sample collected near the garnet isograd along the Marysandi River transect contains 3.3 +/-0.1 Ma monazite ages (P approximate to 0.72 GPa, T approximate to 535 degreesC). This remarkably young age suggests that this portion of the MCT shear zone accommodated a minimum of similar to 30 km of slip over the last 3 Ma (i.e., a slip rate of > 10 mm yr(-1)) and thus could account for nearly half of the convergence across the Himalaya in this period. The distribution of acres and P-T histories reported here are consistent with a thermokinematic model in which the inverted metamorphic sequences underlying the MCT formed by the transposition of right-way-up metamorphic sequences during late Miocene-Pliocene shearing. C1 Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA USA. Univ South Carolina, Dept Geol Sci, Columbia, SC 29208 USA. Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94602 USA. Tribhuvan Univ, Dept Geol, Kathmandu, Nepal. Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA. RP Catlos, EJ (reprint author), Univ Calif Los Angeles, Dept Earth & Space Sci, 3806 Geol, Los Angeles, CA 90095 USA. EM catlos@argon.ess.ucla.edu; tmh@argon.ess.ucla.edu; mjk@geol.sc.edu; marty@oro.ess.ucla.edu; ryerson1@llnl.gov; manning@ess.ucla.edu; bnupreti@wlink.com.np RI Catlos, Elizabeth/B-7943-2011; Harrison, Timothy/E-7443-2012; Manning, Craig/A-1118-2009; Kohn, Matthew/A-2562-2012; UCLA, SIMS/A-1459-2011 OI Manning, Craig/0000-0002-1463-3701; NR 126 TC 171 Z9 172 U1 1 U2 15 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9313 EI 2169-9356 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD AUG 10 PY 2001 VL 106 IS B8 BP 16177 EP 16204 DI 10.1029/2000JB900375 PG 28 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 461LF UT WOS:000170365200009 ER PT J AU Putnam, CD Clancy, SB Tsuruta, H Gonzalez, S Wetmur, JG Tainer, JA AF Putnam, CD Clancy, SB Tsuruta, H Gonzalez, S Wetmur, JG Tainer, JA TI Structure and mechanism of the RuvB Holliday junction branch migration motor SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE AAA plus -class ATPases; arginine finger; branch migration; Holliday junction; recombination ID ESCHERICHIA-COLI RUVA; MEDIATED ATP HYDROLYSIS; SMALL-ANGLE SCATTERING; DNA HELICASE ACTIVITY; COMPLEX IN-VITRO; CRYSTAL-STRUCTURE; THERMOTOGA-MARITIMA; REPLICATION FORKS; STRAND EXCHANGE; HEXAMERIC RINGS AB The RuvB hexamer is the chemomechanical motor of the RuvAB complex that migrates Holliday junction branch-points in DNA recombination and the rescue of stalled DNA replication forks. The 1.6 Angstrom crystal structure of Thermotoga maritima RuvB together with five mutant structures reveal that RuvB is an ATPase-associated with diverse cellular activities (AAA + -class ATPase) with a winged-helix DNA-binding domain. The RuvB-ADP complex structure and mutagenesis suggest how AAA + class ATPases couple nucleotide binding and hydrolysis to interdomain conformational. changes and asymmetry within the RuvB hexamer implied by the crystallographic packing and small-angle X-ray scattering in solution. ATP-driven domain motion is positioned to move double-stranded DNA through the hexamer and drive conformational changes between subunits by altering the complementary hydrophilic protein-protein interfaces. Structural and biochemical analysis of five motifs in the protein suggest that ATP binding is a strained conformation recognized both by sensors and the Walker motifs and that intersubunit activation occurs by an arginine finger motif reminiscent of the GTPase-activating proteins. Taken together, these results provide insights into how RuvB functions as a motor for branch migration of Holliday junctions. (C) 2001 Academic Press. C1 Scripps Res Inst, Skaggs Inst Chem Biol, Dept Biol Mol, La Jolla, CA 92037 USA. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA. CUNY Mt Sinai Sch Med, Dept Microbiol, New York, NY 10029 USA. RP Tainer, JA (reprint author), Scripps Res Inst, Skaggs Inst Chem Biol, Dept Biol Mol, MB 4 10550 N Torrey Pines Rd, La Jolla, CA 92037 USA. FU NCI NIH HHS [CA76431] NR 62 TC 125 Z9 130 U1 1 U2 6 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD AUG 10 PY 2001 VL 311 IS 2 BP 297 EP 310 DI 10.1006/jmbi.2001.4852 PG 14 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 461TU UT WOS:000170380200007 PM 11478862 ER PT J AU Brown, MJ Muller, C Wang, G Costigan, K AF Brown, MJ Muller, C Wang, G Costigan, K TI Meteorological simulations of boundary-layer structure during the 1996 Paso del Norte Ozone Study SO SCIENCE OF THE TOTAL ENVIRONMENT LA English DT Article DE boundary-layer meteorology; mesoscale modeling; border air quality; field study ID TURBULENCE CLOSURE-MODEL; NOCTURNAL DRAINAGE FLOWS; NUMERICAL SIMULATIONS; DYNAMICS; VALLEY; CLOUDS AB Meteorological simulations centered around the border cities of El Paso and Ciudad Juarez have been performed during an ozone episode that occurred on August 13. 1996 during the 1996 Paso del Norte Ozone Study field campaign. Simulations were performed using the HOTMAC boundary-layer meteorological model using a 1, 2, 4 and 8-km horizontal grid size nested mesh system. Investigation of the vertical structure and evolution of the atmospheric boundary layer for the August 12-14 time period is emphasized in this paper due to its suspected importance in precipitating the ozone episode [Sci Total Environ (2001)]. This period was characterized by a slowly-evolving high pressure system over the region, a persistent upper-level jet at 2500-3500 m above ground level (agl), deep daytime mixed layer heights of 3500 rn depth and unusually deep nighttime stable layers extending up to 2500 rn above the ground. The fact that the boundary-layer growth stalled on the morning of August 13 relative to that on August 12 has been suggested as a possible reason for the ozone episode on the 13th. In addition, relatively weak surface-level winds were measured on August 13. Using both model results and experimental data we hypothesize explanations for the slower mixed-layer growth on the morning of the 13th and the stronger surface-level winds found on the 12th and 14th. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Los Alamos Natl Lab, Grp TSA4, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Grp TSA10, Los Alamos, NM 87545 USA. Arizona State Univ, Tempe, AZ 85287 USA. Los Alamos Natl Lab, Grp EES8, Los Alamos, NM 87545 USA. RP Brown, MJ (reprint author), Los Alamos Natl Lab, Grp TSA4, POB 1663,MS F604, Los Alamos, NM 87545 USA. OI Brown, Michael J./0000-0002-8069-0835 NR 23 TC 10 Z9 10 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0048-9697 J9 SCI TOTAL ENVIRON JI Sci. Total Environ. PD AUG 10 PY 2001 VL 276 IS 1-3 BP 111 EP 133 DI 10.1016/S0048-9697(01)00775-6 PG 23 WC Environmental Sciences SC Environmental Sciences & Ecology GA 464LB UT WOS:000170533100008 PM 11516132 ER PT J AU McCarty, KF Nobel, JA Bartelt, NC AF McCarty, KF Nobel, JA Bartelt, NC TI Vacancies in solids and the stability of surface morphology SO NATURE LA English DT Article ID POINT-DEFECTS; SELF-DIFFUSION; RELAXATION; ENERGY; NICKEL; STEPS AB Determining how thermal vacancies are created and destroyed in solids is crucial for understanding many of their physical properties, such as solid-state diffusion. Surfaces are known to be good sources and sinks for bulk vacancies, but directly determining where the exchange between the surface and the bulk occurs is difficult. Here we show that vacancy generation (and annihilation) on the (110) surface of an ordered nickel-aluminium intermetallic alloy does not occur over the entire surface, but only near atomic step edges. This has been determined by oscillating the sample's temperature and observing in real time the response of the surface structure as a function of frequency (a version of Angstrom's method of measuring thermal conductivity(1)) using low-energy electron microscopy. Although the surface-exchange process is slow compared with bulk diffusion, the vacancy-generation rate nevertheless controls the dynamics of the alloy surface morphology. These observations, demonstrating that surface smoothing can occur through bulk vacancy transport rather than surface diffusion, should have important implications for the stability of fabricated nanoscale structures. C1 Sandia Natl Labs, Livermore, CA 94551 USA. RP McCarty, KF (reprint author), Sandia Natl Labs, Livermore, CA 94551 USA. EM mccarty@sandia.gov RI McCarty, Kevin/F-9368-2012 OI McCarty, Kevin/0000-0002-8601-079X NR 22 TC 83 Z9 84 U1 4 U2 38 PU MACMILLAN PUBLISHERS LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD AUG 9 PY 2001 VL 412 IS 6847 BP 622 EP 625 DI 10.1038/35088026 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 460PP UT WOS:000170318000036 PM 11493916 ER PT J AU McLerran, L Schaffner-Bielich, J AF McLerran, L Schaffner-Bielich, J TI Intrinsic broadening of the transverse momentum spectra in ultrarelativistic heavy-ion collisions? SO PHYSICS LETTERS B LA English DT Article ID PROTON-ANTIPROTON COLLISIONS; WILSON RENORMALIZATION-GROUP; MULTIPLICITY DEPENDENCE; SQUARE-ROOT-S=1.8 TEV; PARTICLE-PRODUCTION; NUCLEUS; QUARK; MODEL; DENSITY; FIELDS AB The mean transverse momentum in high energy nuclear collisions is studied. The formation of a Color Glass Condensate results in an increase of the square of the mean transverse momentum with the charged multiplicity per unit rapidity and unit transverse area. This prediction is in agreement with the presently available data, in particular with the heavy-ion data, lending support to the notion that the transverse momentum spectra in ultrarelativistic collisions of heavy nuclei might be controlled by intrinsic PT broadening and not by hadronic rescattering, i.e., transverse flow. (C) 2001 Published by Elsevier Science B.V. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA. RP McLerran, L (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. NR 34 TC 33 Z9 33 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 9 PY 2001 VL 514 IS 1-2 BP 29 EP 32 DI 10.1016/S0370-2693(01)00795-X PG 4 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 463LG UT WOS:000170477200004 ER PT J AU Kogut, JB Toublan, D Sinclair, DK AF Kogut, JB Toublan, D Sinclair, DK TI Diquark condensation at nonzero chemical potential and temperature SO PHYSICS LETTERS B LA English DT Article ID FINITE BARYON DENSITY; QUANTUM CHROMODYNAMICS; 2-COLOR QCD; SUPERCONDUCTIVITY AB SU(2) lattice gauge theory with four flavors of quarks is studied at nonzero chemical potential mu and temperature T by computer simulation and Effective Lagrangian techniques. Simulations are done on 8(4), 8(3) x 4 and 12(3) x 6 lattices and the diquark condensate, chiral order parameter, Wilson line, fermion energy and number densities are measured. Simulations at a fixed, nonzero quark mass provide evidence for a tricritical point in the mu -T plane associated with diquark condensation. For low T, increasing tt takes the system through a line of second order phase transitions to a diquark condensed phase. Increasing T at high mu, the system passes through a line of first order transitions from the diquark phase to the quark-gluon plasma phase. Using Effective Lagrangians we estimate the position of the tricritical point and ascribe its existence to trilinear couplings that increase with mu and T. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Univ Illinois, Dept Phys, Urbana, IL 61801 USA. Argonne Natl Lab, HEP Div, Argonne, IL 60439 USA. RP Kogut, JB (reprint author), Univ Illinois, Dept Phys, Urbana, IL 61801 USA. NR 20 TC 52 Z9 52 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 9 PY 2001 VL 514 IS 1-2 BP 77 EP 87 DI 10.1016/S0370-2693(01)00586-X PG 11 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 463LG UT WOS:000170477200011 ER PT J AU Gray, HN Jorgensen, B McClaugherty, DL Kippenberger, A AF Gray, HN Jorgensen, B McClaugherty, DL Kippenberger, A TI Smart polymeric coatings for surface decontamination SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Article ID TEMPERATURE; LIGANDS AB Polymeric "smart" coatings have been developed that are capable of both detecting and removing hazardous nuclear and heavy metal contaminants from contaminated surfaces. These coatings consist of strippable polymeric compositions containing blends of polymers, copolymers and additives that can be brushed or sprayed onto a surface as a solution or dispersion in aqueous media. Upon drying, these coatings form strong films that can easily be peeled or stripped from the surface. When applied to a contaminated surface, these coatings display responsive behavior. Areas of contamination are indicated by a color change. As the coatings dry, the contaminants are drawn into and fixed in the polymer matrix. Subsequent removal of the coating with entrapped contaminants results in some degree of surface decontamination. Here we report the development and investigation of a smart, decontaminating coating developed for uranium and plutonium. C1 Univ Texas, Dept Chem, Tyler, TX 75799 USA. Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. RP Gray, HN (reprint author), Univ Texas, Dept Chem, 3900 Univ Blvd, Tyler, TX 75799 USA. RI Gray, Howard/B-8012-2013 OI Gray, Howard/0000-0002-1389-4627 NR 27 TC 17 Z9 17 U1 6 U2 36 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0888-5885 J9 IND ENG CHEM RES JI Ind. Eng. Chem. Res. PD AUG 8 PY 2001 VL 40 IS 16 BP 3540 EP 3546 DI 10.1021/ie010034v PG 7 WC Engineering, Chemical SC Engineering GA 463EE UT WOS:000170463200015 ER PT J AU Raptis, CA Pratt, ST AF Raptis, CA Pratt, ST TI Two-photon spectroscopy of autoionizing states of ammonia SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID VACUUM-ULTRAVIOLET ENERGIES; SUB-DOPPLER SPECTROSCOPY; RYDBERG STATES; PHOTOELECTRON-SPECTROSCOPY; PHOTOIONIZATION DYNAMICS; IONIZATION; SELECTION; BANDS; NH3+; ND3 AB Two-photon ionization spectra of jet-cooled NH3 have been obtained in the region between the adiabatic ionization potential and the NH3+ (X) over tilde (2)A(2)(")(0200) ionization threshold. Fairly intense np and nf Rydberg series are observed converging to selected rotational levels of the (X) over tilde (2)A(2)(")(0100) and (0200) states. Rydberg series converging to higher vibrational thresholds and requiring vibrational autoionization by Deltav(i)less than or equal to -2 are also observed. Photoelectron spectroscopy reveals that many of the molecules in the latter series do not autoionize, but instead are ionized by the absorption of an additional photon. The new two-photon spectra are compared with previously reported double resonance spectra in the same energy region, providing insight into questions of the spectroscopic assignments. (C) 2001 American Institute of Physics. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 27 TC 5 Z9 5 U1 0 U2 5 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-9606 EI 1089-7690 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 8 PY 2001 VL 115 IS 6 BP 2483 EP 2491 DI 10.1063/1.1386646 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 458BA UT WOS:000170172300013 ER PT J AU Dixon, DA Feller, D Peterson, KA AF Dixon, DA Feller, D Peterson, KA TI Heats of formation and ionization energies of NHx, x=0-3 SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID TOTAL ATOMIZATION ENERGIES; CORRELATED MOLECULAR CALCULATIONS; BASIS-SET CONVERGENCE; QUARTIC FORCE-FIELD; GAUSSIAN-BASIS SETS; PROTON AFFINITIES; WAVE-FUNCTIONS; PHOTOELECTRON-SPECTROSCOPY; TRIPLE EXCITATIONS; LASER SPECTROSCOPY AB The heats of formation of NH3, NH2, NH and the ionization energies of NH3, NH2, NH, and N have been calculated at high levels of ab initio molecular orbital theory at 0 K. Geometries and frequencies were calculated with coupled cluster theory, including a perturbative treatment of the connected triple excitations and with correlation consistent basis sets up through augmented sextuple zeta in quality. Subsequent extrapolation of the total energies to the complete one-particle basis set limit was performed to further reduce the basis set truncation error. Additional improvements in the atomization energy were achieved by applying corrections for core/valence correlation, scalar relativistic, spin-orbit, and higher order correlation effects. Zero point energies were taken from anharmonic force fields where available or are based on appropriately scaled values. Using the R/UCCSD(T) method, we find the following heats of formation (kcal/mol) at 0 K: DeltaH(f)(NH3)=-9.10+/-0.17 (calc.) versus -9.30+/-0.10 (expt.); DeltaH(f)(NH2)=45.27+/-0.12 (calc.) versus 45.17+/-0.09 (expt.); DeltaH(f)(NH)=85.92+/-0.08 (calc.) versus 90.0+/-4 (expt.); DeltaH(f)(NH3+)=225.44+/-0.23 (calc.) versus 225.59+/-0.08 (expt.); DeltaH(f)(NH2+)=303.00+/-0.20 (calc.) versus 302.60+/-0.08 (expt.); and DeltaH(f)(NH+)=396.56+/-0.12 (calc.). (C) 2001 American Institute of Physics. C1 Pacific NW Natl Lab, William R Wiley Environm Mol Sci Lab, Richland, WA 99352 USA. Washington State Univ, Dept Chem, Richland, WA 99352 USA. RP Dixon, DA (reprint author), Pacific NW Natl Lab, William R Wiley Environm Mol Sci Lab, Richland, WA 99352 USA. NR 52 TC 107 Z9 107 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 8 PY 2001 VL 115 IS 6 BP 2576 EP 2581 DI 10.1063/1.1367283 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 458BA UT WOS:000170172300023 ER PT J AU Song, Y Qian, XM Lau, KC Ng, CY Liu, JB Chen, WW AF Song, Y Qian, XM Lau, KC Ng, CY Liu, JB Chen, WW TI High-resolution energy-selected study of the reaction NH3+-> NH2++H: Accurate thermochemistry for the NH2/NH2+ and NH3/NH3+ systems SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID FIELD IONIZATION PHOTOELECTRON; STATE AMMONIA MOLECULES; SYNCHROTRON-RADIATION; PHOTOION COINCIDENCE; PHOTODISSOCIATION DYNAMICS; DISSOCIATION THRESHOLD; SPECTROSCOPY; RANGE; BANDS; ION AB Employing the newly developed high-resolution pulsed field ionization-photoelectron (PFI-PE)-photoion coincidence (PFI-PEPICO) technique, we have examined the dissociation of energy-selected NH3+ to form NH2++H near its threshold. The breakdown curves for NH2+ and NH3+ thus obtained yield a value of 15.765+/-0.001 eV for the 0 K dissociation threshold or appearance energy (AE) for NH2+ from NH3. This value, together with the known ionization energy (IE=10.1864+/-0.0001 eV) and 0 K bond dissociation energy (D-0=4.6017+/-0.0025 eV) for NH3, allows the determination of the D-0(NH2+-H) and IE(NH2), which are 5.5786+/-0.0010 and 11.1633+/-0.0025 eV, respectively. Using the known 0 K heats of formation (DeltaH(f0)(degrees)) for NH3 and H and the AE(NH2+), we obtain the DeltaH(f0)(degrees)(NH2+)=302.60 +/-0.08 kcal/mol. The PFI-PE spectrum for NH3 exhibits a step-like feature at the 0 K AE(NH2+), indicating that the dissociation of excited NH3 in high-n (n greater than or equal to 100) Rydberg states at energies slightly above the dissociation threshold occurs on a time scale less than or equal to 10(-7) s. This step confirms the AE(NH2+) value derived from the PFI-PEPICO measurements. Highly accurate energetic data with well-founded error limits, such as those obtained in the present and other studies using the PFI techniques, are expected to play an important role for the development of the next generation of ab initio quantum computation procedures. This experiment has stimulated a state-of-the-art ab initio quantum chemical calculation [Dixon , J. Chem. Phys. 115, 2576 (2001)]. The comparison between theoretical predictions and the best experimental results for the NH2/NH2+ and NH3/NH3+ systems indicates that the accuracy of the computational scheme used is less than or equal to0.4 kcal/mol. (C) 2001 American Institute of Physics. C1 US DOE, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Ng, CY (reprint author), US DOE, Ames Lab, Ames, IA 50011 USA. OI LAU, Kai Chung /0000-0003-2125-6841 NR 52 TC 38 Z9 38 U1 0 U2 9 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 8 PY 2001 VL 115 IS 6 BP 2582 EP 2589 DI 10.1063/1.1385523 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 458BA UT WOS:000170172300024 ER PT J AU Viecelli, JA Bastea, S Glosli, JN Ree, FH AF Viecelli, JA Bastea, S Glosli, JN Ree, FH TI Phase transformations of nanometer size carbon particles in shocked hydrocarbons and explosives SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID MELTING TEMPERATURE; DETONATION PROPERTIES; WAVE COMPRESSION; LIQUID CARBON; HIGH-PRESSURE; GRAPHITE; STATE; DISSOCIATION; DEPENDENCE; TRANSITION AB Estimates for the displacement of the phase equilibrium lines for small carbon particles containing from several hundred to several tens of thousands of atoms are made, and an error analysis of the uncertainties in these estimates is derived and evaluated using available experimental data. Hugoniot calculations for methane, benzene, polyethylene, and polybutene, based on a carbon particle surface energy adjusted equation of state, are in better agreement with shock pressure-volume and temperature data than those obtained with a bulk carbon equation of state. The results suggest that carbon particles, of order 10(3)-10(4) atoms, can exist in the liquid state at lower temperatures than bulk carbon. (C) 2001 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM viecelli1@llnl.gov NR 34 TC 27 Z9 30 U1 6 U2 31 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-9606 EI 1089-7690 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 8 PY 2001 VL 115 IS 6 BP 2730 EP 2736 DI 10.1063/1.1386418 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 458BA UT WOS:000170172300040 ER PT J AU Liu, HM Sullivan, RM Hanson, JC Grey, CP Martin, JD AF Liu, HM Sullivan, RM Hanson, JC Grey, CP Martin, JD TI Kinetics and mechanism of the beta- to alpha-CuAlCl4 phase transition: A time-resolved Cu-63 MAS NMR and powder X-ray diffraction study SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID MAGNETIC-RESONANCE; CRYSTAL-STRUCTURE; CHEMICAL-SHIFTS; FRAMEWORK; REFINEMENT; MOLECULES; X=CL; NQR; BR AB The beta and alpha phases of CuAlCl4 have been characterized by solid-state Al-27 and Cu-63 magic angle spinning nuclear magnetic resonance. The very short spin-lattice relaxation times of the copper spins, and the sensitivity of the I = (3)/(2) Cu-63 nucleus to the small differences in the local structure of Cu in the two phases, allowed Cu-63 spectra to be acquired in very short time periods (1 min), in which the beta and alpha phases were clearly resolved. This time resolution was exploited to follow the phase transition from the pseudohexagonal close-packed beta -CuAlCl4 into the pseudocubic close-packed alpha -CuAlCl4, which occurs above 100 degreesC. In situ time-resolved Cu-63 MAS NMR and synchrotron X-ray diffraction experiments were used to measure the kinetics of this phase transition as a function of temperature. The transformation was shown to be a first-order phase transition involving no intermediate phases with an activation energy of 138 kJ/mol. The kinetic data obey a first-order Avrami-Erofe'ev rate law. A one-dimensional growth mechanism is proposed that involves a combination of Cu+ ion self-diffusion and a translational reorganization of the close-packed anion layers imposed by the periodic rotations of [AlCl4](-) tetrahedra. This beta to alpha phase transformation can be induced at ambient temperatures by low partial pressures of ethylene. C1 N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA. SUNY Stony Brook, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Grey, CP (reprint author), N Carolina State Univ, Dept Chem, Box 8204, Raleigh, NC 27695 USA. RI Hanson, jonathan/E-3517-2010; OI Martin, James/0000-0001-7414-2683 NR 71 TC 18 Z9 18 U1 0 U2 8 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 AUG 8 PY 2001 VL 123 IS 31 BP 7564 EP 7573 DI 10.1021/ja010688v PG 10 WC Chemistry, Multidisciplinary SC Chemistry GA 460GL UT WOS:000170299800012 PM 11480977 ER PT J AU Baldelli, S Mailhot, G Ross, PN Somorjai, GA AF Baldelli, S Mailhot, G Ross, PN Somorjai, GA TI Potential-dependent vibrational spectroscopy of solvent molecules at the Pt(111) electrode in a water/acetonitrile mixture studied by sum frequency generation SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID INFRARED-SPECTROSCOPY; WATER; SURFACES; INTERFACES; SPECTRA AB Sum frequency generation (SFG) vibrational spectra of D2O and/or acetonitrile (CH3CN) on a Pt(111) single-crystal electrode were obtained as a function of applied potential in a 5 mol % water/acetonitrile mixed solvent with different 0.1 molar MSO3CF3 Salts (M = H+, Li+, Na+, K+, and Cs+). The results provide a very specific model for the composition of the inner Helmholtz layer as a function of potential and surface charge. Acetonitrile dominates the inner layer with, the CN group directed toward the metal at potentials where the metal has a positive charge. As the surface becomes negatively charged, the acetonitrile orientation flips 180 degrees, with the CH3 group pointing toward the surface. At even more negative surface charge, D2O displaces acetonitrile from the inner layer and is the predominant molecule on the surface. Here water is present as an oriented molecule with the oxygen end pointing toward the metal. The potential (and surface charge) where water is the dominant molecule in the inner Helmholtz layer is determined by the solvation energy of the cation. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Clermont Ferrand, CNRS, UMR 6505, Lab Photochim, Aubiere, France. RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. NR 35 TC 31 Z9 32 U1 1 U2 13 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 AUG 8 PY 2001 VL 123 IS 31 BP 7697 EP 7702 DI 10.1021/ja016063e PG 6 WC Chemistry, Multidisciplinary SC Chemistry GA 460GL UT WOS:000170299800029 PM 11480994 ER PT J AU Goldstein, RZ Volkow, ND Wang, GJ Fowler, JS Rajaram, S AF Goldstein, RZ Volkow, ND Wang, GJ Fowler, JS Rajaram, S TI Addiction changes orbitofrontal gyrus function: involvement in response inhibition SO NEUROREPORT LA English DT Article DE alcohol; anterior cingulate; cocaine; drug addiction; orbitofrontal cortex; PET FDG; Stroop interference score ID ANTERIOR CINGULATE CORTEX; COCAINE; ALCOHOLICS; ABUSERS; PET AB We used the Stroop task as a measure of the ability to inhibit a prepotent response tendency and examined its association with relative glucose metabolism in selected prefrontal brain regions in cocaine addicts, alcoholics, and controls (17 per group). Results revealed that for the substance abusers, higher orbitofrontal gyrus (OFG) activation was associated with lower conflict (higher score; r = 0.32, p < 0.05). For the controls, higher OFG activation was associated with higher conflict (lower score; r = -0.42, p < 0.05). Thus, at baseline, increased relative activation of the OFG is associated with worse performance in controls and better performance in substance abusers on the Stroop task, suggesting reversal of the role of the OFG as a function of addiction. NeuroReport 12:2595-2599 (C) 2001 Lippincott Williams & Wilkins. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. SUNY Stony Brook, Dept Psychol, Stony Brook, NY 11794 USA. RP Goldstein, RZ (reprint author), Brookhaven Natl Lab, Bldg 490,30 Bell Ave, Upton, NY 11973 USA. FU NIAAA NIH HHS [AA/ODO9481-04]; NIDA NIH HHS [DA06891-06, K23 DA015517, R01 DA006891] NR 19 TC 103 Z9 105 U1 2 U2 6 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0959-4965 J9 NEUROREPORT JI Neuroreport PD AUG 8 PY 2001 VL 12 IS 11 BP 2595 EP 2599 DI 10.1097/00001756-200108080-00060 PG 5 WC Neurosciences SC Neurosciences & Neurology GA 457MP UT WOS:000170141600061 PM 11496155 ER PT J AU Miodownik, MA Smereka, P Srolovitz, DJ Holm, EA AF Miodownik, MA Smereka, P Srolovitz, DJ Holm, EA TI Scaling of dislocation cell structures: diffusion in orientation space SO PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES LA English DT Article DE dislocations; scaling; cell structures; diffusion; orientation space ID DEFORMATION; DISORIENTATIONS; CRYSTAL AB This paper examines the idea that the evolution of self-organizing dislocation cells is dominated by random fluctuations in cell orientation. The development of the dislocation cell misorientation distributions during deformation is treated on the basis that noise causes the cell orientations to random walk in orientation space. We solve the orientation equivalent of Fick's second law to get a time-dependent solution for the orientation distributions, misorientation distributions and the strain dependence of the average misorientation angle. In the low-angle limit, average misorientation is proportional to the square root of the strain, and the misorientation distributions scale with the average misorientation angle, in agreement with the experiment. The analysis predicts an infinite number of possible scaling states and not a universal curve, as seen in practice. This discrepancy is discussed. C1 Kings Coll London, Dept Mech Engn, London WC2R 2LS, England. Univ Michigan, Dept Math, Ann Arbor, MI 48109 USA. Princeton Univ, Princeton Mat Inst, Princeton, NJ 08544 USA. Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA. Univ Michigan, Dept Math, Ann Arbor, MI 48109 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA. RP Miodownik, MA (reprint author), Kings Coll London, Dept Mech Engn, London WC2R 2LS, England. RI Smereka, Peter/F-9974-2013; Holm, Elizabeth/S-2612-2016 OI Holm, Elizabeth/0000-0003-3064-5769 NR 22 TC 14 Z9 14 U1 0 U2 4 PU ROYAL SOC PI LONDON PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND SN 1364-5021 EI 1471-2946 J9 P ROY SOC A-MATH PHY JI Proc. R. Soc. A-Math. Phys. Eng. Sci. PD AUG 8 PY 2001 VL 457 IS 2012 BP 1807 EP 1819 PG 13 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 462PH UT WOS:000170428100003 ER PT J AU Savikhin, S Xu, W Martinsson, P Chitnis, PR Struve, WS AF Savikhin, S Xu, W Martinsson, P Chitnis, PR Struve, WS TI Kinetics of charge separation and A(0)(-)-> A(1) electron transfer in photosystem reaction centers SO BIOCHEMISTRY LA English DT Article ID SYNECHOCYSTIS SP PCC-6803; I REACTION-CENTER; PHOTOSYNTHETIC REACTION-CENTER; ULTRAFAST PRIMARY PROCESSES; 4-ANGSTROM RESOLUTION; ENERGY-TRANSFER; CHLOROPHYLL-A; ANTENNA; P700; FLUORESCENCE AB The charge separation P700*A(0) --> P700(+)A(0)(-) and the subsequent electron transfer from the primary to secondary electron acceptor have been studied by subtracting absorption difference profiles for cyanobacterial photosystem I (PS I) complexes with open and closed reaction centers. Samples were excited at 660 run, which lies toward the blue edge of the core antenna absorption spectrum. The resulting PS I kinetics were analyzed in terms of the relevant P700, P700(+), A(0), and A(0)(-) absorption spectra. In our kinetic model, the radical pair P700+A(0)(-) forms with 1.3 ps rise kinetics after creation of electronically excited P700*. The formation of A(1)(-) via electron transfer from A(0) requires similar to 13 ps. The kinetics of the latter step are appreciably faster than previously estimated by other groups (20-50 ps). C1 Iowa State Univ, US Dept Energy, Ames Lab, Dept Chem, Ames, IA 50011 USA. Iowa State Univ, Dept Biochem Biophys & Mol Biol, Ames, IA 50011 USA. RP Struve, WS (reprint author), Iowa State Univ, US Dept Energy, Ames Lab, Dept Chem, Ames, IA 50011 USA. NR 39 TC 39 Z9 48 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD AUG 7 PY 2001 VL 40 IS 31 BP 9282 EP 9290 DI 10.1021/bi0104165 PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 460HA UT WOS:000170301100025 PM 11478895 ER PT J AU Masion, A Doelsch, E Rose, J Moustier, S Bottero, JY Bertsch, PM AF Masion, A Doelsch, E Rose, J Moustier, S Bottero, JY Bertsch, PM TI Speciation and crystal chemistry of Iron(III) chloride hydrolyzed in the presence of SiO4 ligands. 3. Semilocal scale structure of the aggregates SO LANGMUIR LA English DT Article ID X-RAY-SCATTERING; NATURAL ORGANIC-MATTER; FE(III) NITRATE SOLUTIONS; K-EDGE EXAFS; GROWTH MECHANISMS; PO4 IONS; IRON OXYHYDROXIDES; FE OXYHYDROXIDE; FERRIHYDRITE; NUCLEATION AB A series of fresh and 7 day aged Fe-Si samples have been investigated at the semilocal scale by small-angle X-ray scattering (SAXS), All the scattering curves are typical of amorphous aggregates. The subunits of the precipitates could not be determined precisely. However, the trend derived from SAXS modeling indicates that almost all the Fe is within subunits smaller than 7.5 Angstrom. The high fractal dimension (D-f) values of the aggregates ranging from about 2.0 to 2.7 are attributed to the presence of Si ligands. However, the value of D-f as a function of pH and Si concentration varies linearly with the polymerization state of iron. C1 Europole Mediterraneen Arbois, UMR 6635 CNRS Aix Marseille 3, CEREGE, F-13545 Aix En Provence 04, France. Univ Georgia, Savannah River Ecol Lab, AACES, Aiken, SC 29802 USA. RP Masion, A (reprint author), Europole Mediterraneen Arbois, UMR 6635 CNRS Aix Marseille 3, CEREGE, BP 80, F-13545 Aix En Provence 04, France. RI doelsch, emmanuel/C-1404-2008 OI doelsch, emmanuel/0000-0002-7478-4296 NR 35 TC 13 Z9 13 U1 0 U2 10 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD AUG 7 PY 2001 VL 17 IS 16 BP 4753 EP 4757 DI 10.1021/la001650j PG 5 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 460JV UT WOS:000170305200014 ER PT J AU Barabash, R Ice, GE Larson, BC Pharr, GM Chung, KS Yang, W AF Barabash, R Ice, GE Larson, BC Pharr, GM Chung, KS Yang, W TI White microbeam diffraction from distorted crystals SO APPLIED PHYSICS LETTERS LA English DT Article ID X-RAY MICROBEAMS; STRAIN; DEFORMATION; TEXTURE; FILMS AB We present a general description of white-beam (Laue) scattering from grains with dislocations. This approach is applied to examples with equal numbers of positive and negative Burger's vectors (paired) and with unpaired dislocations of one sign (geometrically necessary). We find that streaking of the Laue reflections is sensitive to both long-range geometrical rotations introduced by unpaired edge dislocations and to local rotation fluctuations introduced by the total number of dislocations (paired and unpaired). We demonstrate the technique by analyzing the dislocation distribution in a nanoindented Cu single crystal. (C) 2001 American Institute of Physics. C1 Oak Ridge Natl Lab, Div Met, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Ceram, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. RP Barabash, R (reprint author), Oak Ridge Natl Lab, Div Met, POB 2008, Oak Ridge, TN 37831 USA. RI Yang, Wenge/H-2740-2012 NR 20 TC 84 Z9 84 U1 1 U2 17 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 6 PY 2001 VL 79 IS 6 BP 749 EP 751 DI 10.1063/1.1389321 PG 3 WC Physics, Applied SC Physics GA 458YM UT WOS:000170223100016 ER PT J AU Dhote, AM Auciello, O Gruen, DM Ramesh, R AF Dhote, AM Auciello, O Gruen, DM Ramesh, R TI Studies of thin film growth and oxidation processes for conductive Ti-Al diffusion barrier layers via in situ surface sensitive analytical techniques SO APPLIED PHYSICS LETTERS LA English DT Article ID INTEGRATION; CAPACITORS; MEMORIES; KINETICS; SILICON AB Conducting diffusion barrier layers play a critical role in high-density memory integration. We recently demonstrated that Ti-Al can be used as a diffusion barrier layer for the integration of ferroelectric capacitors with complementary metal-oxide semiconductor devices for the fabrication of nonvolatile ferroelectric random access memories (NVFRAMs). Here, we discuss results from systematic studies designed to understand Ti-Al film growth and oxidation processes using in situ ion beam sputter deposition in conjunction with complementary in situ atomic layer-resolution mass spectroscopy of recoil ion (MSRI) and surface sensitive x-ray photoelectron spectroscopy (XPS). The concurrent MSRI/XPS analysis revealed that amorphous Ti-Al layers produced by tailored sputter-deposition methods are resistant to oxidation to at least 600 degreesC, and that oxidation occurs only when the a-Ti-Al layers are exposed to oxygen at > 600 degreesC, via the segregation of Ti species to the surface and TiO2 formation. The a-Ti-Al layers discussed in this letter could be used in the double functionality of a bottom electrode/diffusion barrier for the integration of ferroelectric capacitors with Si substrates for the fabrication of NVFRAMs and other devices. (C) 2001 American Institute of Physics. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Univ Maryland, Dept Mat & Nucl Engn, College Pk, MD 20742 USA. RP Dhote, AM (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 14 TC 17 Z9 17 U1 1 U2 5 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 6 PY 2001 VL 79 IS 6 BP 800 EP 802 DI 10.1063/1.1391237 PG 3 WC Physics, Applied SC Physics GA 458YM UT WOS:000170223100033 ER PT J AU Zurbuchen, MA Schlom, DG Streiffer, SK AF Zurbuchen, MA Schlom, DG Streiffer, SK TI Comment on "High-resolution electron microscopy investigations on stacking faults in SrBi2Ta2O9 ferroelectric thin films" [Appl. Phys. Lett. 78, 973 (2001)] SO APPLIED PHYSICS LETTERS LA English DT Editorial Material ID CRYSTAL C1 Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16803 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Zurbuchen, MA (reprint author), Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16803 USA. RI Streiffer, Stephen/A-1756-2009; Zurbuchen, Mark/H-1664-2012; Schlom, Darrell/J-2412-2013 OI Zurbuchen, Mark/0000-0002-8947-6309; Schlom, Darrell/0000-0003-2493-6113 NR 6 TC 4 Z9 4 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 6 PY 2001 VL 79 IS 6 BP 887 EP 888 DI 10.1063/1.1390315 PG 2 WC Physics, Applied SC Physics GA 458YM UT WOS:000170223100062 ER PT J AU Manaa, MR AF Manaa, MR TI A comparative study of cubic B4N4 and C-8 SO JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM LA English DT Article; Proceedings Paper CT 9th Annual Conference on Current Trends in Computational Chemistry (CCTCC) CY NOV 03-04, 2000 CL VICKSBURG, MS SP Natl Sci Fdn, NHI, USA High Performance Comp Res Ctr, Naval Oceanog Off, CRAY Inc DE B4N4; C-8; IR; cubic; ab initio ID QUADRATIC CONFIGURATION-INTERACTION; SMALL CARBON CLUSTERS; BORON-NITRIDE; THERMOCHEMISTRY; VIBRATIONS AB We report density functional (BLYP, B3LYP, and B3PW91), MP2, MP4, configuration interaction (CISD) and (QCISD), and coupled cluster (CCSD) electronic structure calculations on the highly symmetric cubic forms of carbon and boron nitride. Based on these calculations, the experimental IR assignment of simple: cubic B4N4 needs reassessment. The cubic C-8 structure is about 103 kcal mol(-1) above the cyclic planar structure at the QCISD/DZP level, which differs considerably from an earlier MP2/6-31G* determination of 65 kcal mol(-1). As expected, the B-N single-bond character is longer than the C-C bond. Atomization energies for both clusters are reported. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, Energet Mat Ctr, Livermore, CA 94551 USA. RP Manaa, MR (reprint author), Lawrence Livermore Natl Lab, Energet Mat Ctr, L-282,POB 808, Livermore, CA 94551 USA. EM manaal@llnl.gov NR 27 TC 6 Z9 6 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-1280 J9 J MOL STRUC-THEOCHEM JI Theochem-J. Mol. Struct. PD AUG 6 PY 2001 VL 549 SI SI BP 23 EP 26 DI 10.1016/S0166-1280(01)00486-9 PG 4 WC Chemistry, Physical SC Chemistry GA 467CZ UT WOS:000170684100004 ER PT J AU Carlino, G Konishi, K Kumar, SP Murayama, H AF Carlino, G Konishi, K Kumar, SP Murayama, H TI Vacuum structure and flavor symmetry breaking in supersymmetric SO(n(c)) gauge theories SO NUCLEAR PHYSICS B LA English DT Article ID YANG-MILLS THEORY; SUPERCONFORMAL FIELD-THEORIES; ELECTRIC-MAGNETIC DUALITY; 4 DIMENSIONS; MODULI SPACE; SUPER-QCD; CONFINEMENT; MONOPOLES; DYNAMICS AB We determine the vacuum structure and phases of N = 1 theories obtained via a mass mu for the adjoint chiral superfield in N = 2, SO(n(c)) SQCD. For large number of flavors these theories have two groups of vacua. The first exhibits dynamical breaking of flavor symmetry USp(2n f) --> U(n f) and arises as a relevant deformation of a non-trivial superconformal theory. These are in the confined phase. The second group, in an IR-free phase with unbroken flavor symmetry, is produced from a Coulomb branch singularity with Seiberg's dual gauge symmetry. In the large-mu regime both groups of vacua are well-described by dual quarks and mesons, and dynamical symmetry breaking in the first group occurs via meson condensation. We follow the description of these vacua from weak to strong coupling and demonstrate a nontrivial agreement between the phases and the number of vacua in the two regimes. We construct the semiclassical monopole flavor multiplets and argue that their multiplicity is consistent with the number of N = 1 vacua. (C) 2001 Published by Elsevier Science B.V. C1 Univ Coll Swansea, Dept Phys, Swansea SA2 8PP, W Glam, Wales. Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy. Ist Nazl Fis Nucl, Sez Pisa, Pisa, Italy. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Univ Coll Swansea, Dept Phys, Swansea SA2 8PP, W Glam, Wales. EM g.carlino@swansea.ac.uk RI Murayama, Hitoshi/A-4286-2011 NR 27 TC 34 Z9 34 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 EI 1873-1562 J9 NUCL PHYS B JI Nucl. Phys. B PD AUG 6 PY 2001 VL 608 IS 1-2 BP 51 EP 102 DI 10.1016/S0550-3213(01)00253-X PG 52 WC Physics, Particles & Fields SC Physics GA 463MT UT WOS:000170480500002 ER PT J AU Ji, XD Osborne, J AF Ji, XD Osborne, J TI An analysis of the next-to-leading order corrections to the g(T)(=g(1)+g(2)) scaling function SO NUCLEAR PHYSICS B LA English DT Article ID DEEP-INELASTIC-SCATTERING; SPIN STRUCTURE-FUNCTION; POLARIZED STRUCTURE FUNCTIONS; NUCLEON STRUCTURE FUNCTIONS; STRUCTURE-FUNCTION G(2); FREE GAUGE-THEORIES; SUM-RULES; PARTON DISTRIBUTIONS; ELECTRON-SCATTERING; POWER CORRECTIONS AB We present a general method for obtaining the quantum chromodynamical radiative corrections to the higher-twist (power-suppressed) contributions to inclusive deep-inelastic scattering in terms of light-cone correlation functions of the fundamental fields of quantum chromodynamics. Using this procedure, we calculate the previously unknown O(alpha (S)) corrections to the twist-three part of the spin scaling function g(T) (x(B), Q(2))(= g(1) (x(B), Q(2)) + g(2)(x(B), Q(2))) and the corresponding forward Compton amplitude ST (v, Q2). Expanding our result about the unphysical point x(B) = infinity, we arrive at an operator product expansion of the nonlocal product of two electromagnetic current operators involving twist-two and -three operators valid to O(alpha (S)) for forward matrix elements. We find that the Wandzura-Wilczek relation between g(1) (x(B), Q(2)) and the twist-two part of g(T) (X-B, Q(2)) is respected in both the singlet and non-singlet sectors at this order, and argue its validity to all orders. The large-N-C limit does not appreciably simplify the twist-three Wilson coefficients. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Univ Maryland, Dept Phys, College Pk, MD 20742 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Univ Maryland, Dept Phys, College Pk, MD 20742 USA. EM jaosborne@lbl.gov NR 64 TC 11 Z9 11 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 EI 1873-1562 J9 NUCL PHYS B JI Nucl. Phys. B PD AUG 6 PY 2001 VL 608 IS 1-2 BP 235 EP 278 DI 10.1016/S0550-3213(01)00249-8 PG 44 WC Physics, Particles & Fields SC Physics GA 463MT UT WOS:000170480500009 ER PT J AU Abazov, VM Abbott, B Abdesselam, A Abolins, M Abramov, V Acharya, BS Adams, DL Adams, M Ahmed, SN Alexeev, GD Alves, GA Amos, N Anderson, EW Baarmand, MM Babintsev, VV Babukhadia, L Bacon, TC Baden, A Baldin, B Balm, PW Banerjee, S Barberis, E Baringer, P Barreto, J Bartlett, JF Bassler, U Bauer, D Bean, A Begel, M Belyaev, A Beri, SB Bernardi, G Bertram, I Besson, A Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Bhattacharjee, M Blazey, G Blessing, S Boehnlein, A Bojko, NI Borcherding, F Bos, K Brandt, A Breedon, R Briskin, G Brock, R Brooijmans, G Bross, A Buchholz, D Buehler, M Buescher, V Burtovoi, VS Butler, JM Canelli, F Carvalho, W Casey, D Casilum, Z Castilla-Valdez, H Chakraborty, D Chan, KM Chekulaev, SV Cho, DK Choi, S Chopra, S Christenson, JH Chung, M Claes, D Clark, AR Cochran, J Coney, L Connolly, B Cooper, WE Coppage, D Cummings, MAC Cutts, D Davis, GA Davis, K De, K de Jong, SJ Del Signore, K Demarteau, M Demina, R Demine, P Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Di Loreto, G Doulas, S Draper, P Ducros, Y Dudko, LV Duensing, S Duflot, L Dugad, SR Dyshkant, A Edmunds, D Ellison, J Elvira, VD Engelmann, R Eno, S Eppley, G Ermolov, P Eroshin, OV Estrada, J Evans, H Evdokimov, VN Fahland, T Feher, S Fein, D Ferbel, T Filthaut, F Fisk, HE Fisyak, Y Flattum, E Fleuret, F Fortner, M Frame, KC Fuess, S Gallas, E Galyaev, AN Gao, M Gavrilov, V Genik, RJ Genser, K Gerber, CE Gershtein, Y Gilmartin, R Ginther, G Gomez, B Gomez, G Goncharov, PI Solis, JLG Gordon, H Goss, LT Gounder, K Goussiou, A Graf, N Graham, G Grannis, PD Green, JA Greenlee, H Grinstein, S Groer, L Grunendahl, S Gupta, A Gurzhiev, SN Gutierrez, G Gutierrez, P Hadley, NJ Haggerty, H Hagopian, S Hagopian, V Hall, RE Hanlet, P Hansen, S Hauptman, JM Hays, C Hebert, C Hedin, D Heinson, AP Heintz, U Heuring, T Hildreth, MD Hirosky, R Hobbs, JD Hoeneisen, B Huang, Y Illingworth, R Ito, AS Jaffre, M Jain, S Jesik, R Johns, K Johnson, M Jonckheere, A Jones, M Jostlein, H Juste, A Kahn, S Kajfasz, E Kalinin, AM Karmanov, D Karmgard, D Kehoe, R Kharchilava, A Kim, SK Klima, B Knuteson, B Ko, W Kohli, JM Kostritskiy, AV Kotcher, J Kotwal, AV Kozelov, AV Kozlovsky, EA Krane, J Krishnaswamy, MR Krivkova, P Krzywdzinski, S Kubantsev, M Kuleshov, S Kulik, Y Kunori, S Kupco, A Kuznetsov, VE Landsberg, G Leflat, A Leggett, C Lehner, F Li, J Li, QZ Lima, JGR Lincoln, D Linn, SL Linnemann, J Lipton, R Lucotte, A Lueking, L Lundstedt, C Luo, C Maciel, AKA Madaras, RJ Malyshev, VL Manankov, V Mao, HS Marshall, T Martin, MI Martin, RD Mauritz, KM May, B Mayorov, AA McCarthy, R McDonald, J McMahon, T Melanson, HL Merkin, M Merritt, KW Miao, C Miettinen, H Mihalcea, D Mishra, CS Mokhov, N Mondal, NK Montgomery, HE Moore, RW Mostafa, M da Motta, H Nagy, E Nang, F Narain, M Narasimham, VS Neal, HA Negret, JP Negroni, S Nunnemann, T O'Neil, D Oguri, V Olivier, B Oshima, N Padley, P Pan, LJ Papageorgiou, K Para, A Parashar, N Patridge, R Parua, N Paterno, M Patwa, A Pawlik, B Perkins, J Peters, M Peters, O Petroff, P Piegaia, R Piekarz, H Pope, BG Popkov, E Prosper, HB Protopopescu, S Qian, J Raja, R Rajagopalan, S Ramberg, E Rapidis, PA Reay, NW Reucroft, S Rha, J Ridel, M Rijssenbeek, M Rockwell, T Roco, M Rubinov, P Ruchti, R Rutherfoord, J Sabirov, BM Santoro, A Sawyer, L Schamberger, RD Schellman, H Schwartzman, A Sen, N Shabalina, E Shivpuri, RK Shpakov, D Shupe, M Sidwell, RA Simak, V Singh, H Singh, JB Sirotenko, V Slattery, P Smith, E Smith, RP Snihur, R Snow, GR Snow, J Snyder, S Solomon, J Sorin, V Sosebee, M Sotnikova, N Soustruznik, K Souza, M Stanton, NR Steinbruck, G Stephens, RW Stichelbaut, F Stoker, D Stolin, V Stoyanova, DA Strauss, M Strovink, M Stutte, L Sznajder, A Taylor, W Tentindo-Repond, S Tripathi, SM Trippe, TG Turcot, AS Tuts, PM van Gemmeren, P Vaniev, V Van Kooten, R Varelas, N Vertogradov, LS Volkov, AA Vorobiev, AP Wahl, HD Wang, H Wang, ZM Warchol, J Watts, G Wayne, M Weerts, H White, A White, JT Whiteson, D Wightman, JA Wijngaarden, DA Willis, S Wimpenny, SJ Womersley, J Wood, DR Yamada, R Yamin, P Yasuda, T Yatsunenko, YA Yip, K Youssef, S Yu, J Yu, Z Zanabria, M Zheng, H Zhou, Z Zielinski, M Zieminska, D Zieminski, A Zutshi, V Zverev, EG Zylberstejn, A AF Abazov, VM Abbott, B Abdesselam, A Abolins, M Abramov, V Acharya, BS Adams, DL Adams, M Ahmed, SN Alexeev, GD Alves, GA Amos, N Anderson, EW Baarmand, MM Babintsev, VV Babukhadia, L Bacon, TC Baden, A Baldin, B Balm, PW Banerjee, S Barberis, E Baringer, P Barreto, J Bartlett, JF Bassler, U Bauer, D Bean, A Begel, M Belyaev, A Beri, SB Bernardi, G Bertram, I Besson, A Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Bhattacharjee, M Blazey, G Blessing, S Boehnlein, A Bojko, NI Borcherding, F Bos, K Brandt, A Breedon, R Briskin, G Brock, R Brooijmans, G Bross, A Buchholz, D Buehler, M Buescher, V Burtovoi, VS Butler, JM Canelli, F Carvalho, W Casey, D Casilum, Z Castilla-Valdez, H Chakraborty, D Chan, KM Chekulaev, SV Cho, DK Choi, S Chopra, S Christenson, JH Chung, M Claes, D Clark, AR Cochran, J Coney, L Connolly, B Cooper, WE Coppage, D Cummings, MAC Cutts, D Davis, GA Davis, K De, K de Jong, SJ Del Signore, K Demarteau, M Demina, R Demine, P Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Di Loreto, G Doulas, S Draper, P Ducros, Y Dudko, LV Duensing, S Duflot, L Dugad, SR Dyshkant, A Edmunds, D Ellison, J Elvira, VD Engelmann, R Eno, S Eppley, G Ermolov, P Eroshin, OV Estrada, J Evans, H Evdokimov, VN Fahland, T Feher, S Fein, D Ferbel, T Filthaut, F Fisk, HE Fisyak, Y Flattum, E Fleuret, F Fortner, M Frame, KC Fuess, S Gallas, E Galyaev, AN Gao, M Gavrilov, V Genik, RJ Genser, K Gerber, CE Gershtein, Y Gilmartin, R Ginther, G Gomez, B Gomez, G Goncharov, PI Solis, JLG Gordon, H Goss, LT Gounder, K Goussiou, A Graf, N Graham, G Grannis, PD Green, JA Greenlee, H Grinstein, S Groer, L Grunendahl, S Gupta, A Gurzhiev, SN Gutierrez, G Gutierrez, P Hadley, NJ Haggerty, H Hagopian, S Hagopian, V Hall, RE Hanlet, P Hansen, S Hauptman, JM Hays, C Hebert, C Hedin, D Heinson, AP Heintz, U Heuring, T Hildreth, MD Hirosky, R Hobbs, JD Hoeneisen, B Huang, Y Illingworth, R Ito, AS Jaffre, M Jain, S Jesik, R Johns, K Johnson, M Jonckheere, A Jones, M Jostlein, H Juste, A Kahn, S Kajfasz, E Kalinin, AM Karmanov, D Karmgard, D Kehoe, R Kharchilava, A Kim, SK Klima, B Knuteson, B Ko, W Kohli, JM Kostritskiy, AV Kotcher, J Kotwal, AV Kozelov, AV Kozlovsky, EA Krane, J Krishnaswamy, MR Krivkova, P Krzywdzinski, S Kubantsev, M Kuleshov, S Kulik, Y Kunori, S Kupco, A Kuznetsov, VE Landsberg, G Leflat, A Leggett, C Lehner, F Li, J Li, QZ Lima, JGR Lincoln, D Linn, SL Linnemann, J Lipton, R Lucotte, A Lueking, L Lundstedt, C Luo, C Maciel, AKA Madaras, RJ Malyshev, VL Manankov, V Mao, HS Marshall, T Martin, MI Martin, RD Mauritz, KM May, B Mayorov, AA McCarthy, R McDonald, J McMahon, T Melanson, HL Merkin, M Merritt, KW Miao, C Miettinen, H Mihalcea, D Mishra, CS Mokhov, N Mondal, NK Montgomery, HE Moore, RW Mostafa, M da Motta, H Nagy, E Nang, F Narain, M Narasimham, VS Neal, HA Negret, JP Negroni, S Nunnemann, T O'Neil, D Oguri, V Olivier, B Oshima, N Padley, P Pan, LJ Papageorgiou, K Para, A Parashar, N Patridge, R Parua, N Paterno, M Patwa, A Pawlik, B Perkins, J Peters, M Peters, O Petroff, P Piegaia, R Piekarz, H Pope, BG Popkov, E Prosper, HB Protopopescu, S Qian, J Raja, R Rajagopalan, S Ramberg, E Rapidis, PA Reay, NW Reucroft, S Rha, J Ridel, M Rijssenbeek, M Rockwell, T Roco, M Rubinov, P Ruchti, R Rutherfoord, J Sabirov, BM Santoro, A Sawyer, L Schamberger, RD Schellman, H Schwartzman, A Sen, N Shabalina, E Shivpuri, RK Shpakov, D Shupe, M Sidwell, RA Simak, V Singh, H Singh, JB Sirotenko, V Slattery, P Smith, E Smith, RP Snihur, R Snow, GR Snow, J Snyder, S Solomon, J Sorin, V Sosebee, M Sotnikova, N Soustruznik, K Souza, M Stanton, NR Steinbruck, G Stephens, RW Stichelbaut, F Stoker, D Stolin, V Stoyanova, DA Strauss, M Strovink, M Stutte, L Sznajder, A Taylor, W Tentindo-Repond, S Tripathi, SM Trippe, TG Turcot, AS Tuts, PM van Gemmeren, P Vaniev, V Van Kooten, R Varelas, N Vertogradov, LS Volkov, AA Vorobiev, AP Wahl, HD Wang, H Wang, ZM Warchol, J Watts, G Wayne, M Weerts, H White, A White, JT Whiteson, D Wightman, JA Wijngaarden, DA Willis, S Wimpenny, SJ Womersley, J Wood, DR Yamada, R Yamin, P Yasuda, T Yatsunenko, YA Yip, K Youssef, S Yu, J Yu, Z Zanabria, M Zheng, H Zhou, Z Zielinski, M Zieminska, D Zieminski, A Zutshi, V Zverev, EG Zylberstejn, A CA D0 Collaboration TI Search for heavy particles decaying into electron-positron pairs in p(p)over-bar collisions SO PHYSICAL REVIEW LETTERS LA English DT Article ID LOW-SCALE TECHNICOLOR; ASSISTED TECHNICOLOR; ROOT-S=1.8 TEV; GAUGE BOSONS AB We present results of searches for technirho (rho (T)), techniomega (omega (T)), and Z' particles, using the decay channels rho (T), omega (T), Z' --> e(+)e(-). The search is based on 124.8 pb(-1) of data collected by the DO detector at the Fermilab Tevatron during 1992-1996. In the absence of a signal, we set 95% C.L. upper limits on the cross sections for the processes p (p) over bar --> rho (T), omega (T), Z' - e(+)e(-) as a function of the mass of the decaying particle. For certain model parameters, we exclude the existence of degenerate rho (T) and omega (T) states with masses below about 200 GeV. We exclude a Z' with mass below 670 GeV, assuming that it has the same couplings to fermions as the Z boson. C1 Joint Inst Nucl Res, Dubna, Russia. Univ Buenos Aires, Buenos Aires, DF, Argentina. Ctr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, Brazil. Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Los Andes, Bogota, Colombia. Charles Univ Prague, Ctr Particle Phys, Prague, Czech Republic. Acad Sci, Inst Phys, Ctr Particle Phys, Prague, Czech Republic. Univ San Francisco Quito, Quito, Ecuador. Univ Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, France. Univ Aix Marseille 2, CNRS, IN2P3, CPPM, Marseille, France. CNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, France. Univ Paris 06 & 7, LPNHE, CNRS, IN2P3, Paris, France. CEA Saclay, Serv Phys Particules, DAPNIA, Saclay, France. Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany. Panjab Univ, Chandigarh 160014, India. Univ Delhi, Delhi 110007, India. Tata Inst Fundamental Res, Mumbai, India. Seoul Natl Univ, Seoul, South Korea. CINVESTAV, Mexico City 14000, DF, Mexico. NIKHEF, FOM Inst, Amsterdam, Netherlands. Univ Amsterdam, NIKHEF, Amsterdam, Netherlands. Univ Nijmegen, NIKHEF, Nijmegen, Netherlands. Inst Nucl Phys, Krakow, Poland. Inst Theoret & Expt Phys, Moscow 117259, Russia. Moscow MV Lomonosov State Univ, Moscow, Russia. Inst High Energy Phys, Protvino, Russia. Univ Lancaster, Lancaster, England. Univ London Imperial Coll Sci & Technol, London, England. Univ Arizona, Tucson, AZ 85721 USA. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. Univ Calif Davis, Davis, CA 95616 USA. Calif State Univ Fresno, Fresno, CA 93740 USA. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Florida State Univ, Tallahassee, FL 32306 USA. Univ Hawaii, Honolulu, HI 96822 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, 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 Nebraska, Lincoln, NE 68588 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. Texas A&M Univ, College Stn, TX 77843 USA. Rice Univ, Houston, TX 77005 USA. Univ Virginia, Charlottesville, VA 22901 USA. Univ Washington, Seattle, WA 98195 USA. RP Abazov, VM (reprint author), Joint Inst Nucl Res, Dubna, Russia. RI Sznajder, Andre/L-1621-2016; Canelli, Florencia/O-9693-2016; Shivpuri, R K/A-5848-2010; Gutierrez, Phillip/C-1161-2011; Kim, Sun Kee/G-2042-2015; Dudko, Lev/D-7127-2012; Leflat, Alexander/D-7284-2012; Merkin, Mikhail/D-6809-2012; Yip, Kin/D-6860-2013; Kuleshov, Sergey/D-9940-2013; De, Kaushik/N-1953-2013; Oguri, Vitor/B-5403-2013; Alves, Gilvan/C-4007-2013; Belyaev, Alexander/F-6637-2015; Chekulaev, Sergey/O-1145-2015 OI Sznajder, Andre/0000-0001-6998-1108; Canelli, Florencia/0000-0001-6361-2117; Kim, Sun Kee/0000-0002-0013-0775; Dudko, Lev/0000-0002-4462-3192; Yip, Kin/0000-0002-8576-4311; Kuleshov, Sergey/0000-0002-3065-326X; De, Kaushik/0000-0002-5647-4489; Belyaev, Alexander/0000-0002-1733-4408; NR 12 TC 24 Z9 24 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 AUG 6 PY 2001 VL 87 IS 6 AR 061802 DI 10.1103/PhysRevLett.87.061802 PG 6 WC Physics, Multidisciplinary SC Physics GA 460LZ UT WOS:000170310200007 PM 11497822 ER PT J AU Aranson, I Gurevich, A Vinokur, V AF Aranson, I Gurevich, A Vinokur, V TI Vortex avalanches and magnetic flux fragmentation in superconductors SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; CURRENT FLOW; FILMS; LATTICE; GROWTH; INSTABILITY; RELAXATION; DEFECTS AB We report the results of numerical simulations of nonisothermal dendritic flux penetration in type-II superconductors. We propose a generic mechanism of dynamic branching of a propagating hot spot of a flux flow/normal state triggered by a local heat pulse. The branching occurs when the flux hot spot reflects from inhomogeneities or the boundary on which magnetization currents either vanish, or change direction. The hot spot then undergoes a cascade of successive splittings, giving rise to a dissipative dendritic-type flux structure. This dynamic state eventually cools down, turning into a frozen multifilamentary pattern of magnetization currents. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Univ Wisconsin, Ctr Appl Superconduct, Madison, WI 53706 USA. RP Aranson, I (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Gurevich, Alex/A-4327-2008; Aranson, Igor/I-4060-2013 OI Gurevich, Alex/0000-0003-0759-8941; NR 26 TC 58 Z9 58 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 AUG 6 PY 2001 VL 87 IS 6 AR 067003 DI 10.1103/PhysRevLett.87.067003 PG 4 WC Physics, Multidisciplinary SC Physics GA 460LZ UT WOS:000170310200030 PM 11497845 ER PT J AU Bhattacharyya, P Daly, PJ Zhang, CT Grabowski, ZW Saha, SK Broda, R Fornal, B Ahmad, I Seweryniak, D Wiedenhover, I Carpenter, MP Janssens, RVF Khoo, TL Lauritsen, T Lister, CJ Reiter, P Blomqvist, J AF Bhattacharyya, P Daly, PJ Zhang, CT Grabowski, ZW Saha, SK Broda, R Fornal, B Ahmad, I Seweryniak, D Wiedenhover, I Carpenter, MP Janssens, RVF Khoo, TL Lauritsen, T Lister, CJ Reiter, P Blomqvist, J TI Magic nucleus Sn-132 and its one-neutron-hole neighbor Sn-131 SO PHYSICAL REVIEW LETTERS LA English DT Article ID PB-208; DECAY AB Prompt and delayed gamma -ray cascades in doubly magic Sn-132 and its neighbor Sn-131 have been studied at Gammasphere using a Cm-248 fission source. Isotopic assignments of unknown gamma rays were based on coincidences with known transitions in A = 112-116 Pd fission partners. The yrast level spectra of both tin nuclei are interpreted using empirical nucleon-nucleon interactions from the Sn-132 and Pb-208 regions. Results include identification of the (nuf(7/2) h(11/2)(-1))9(+) aligned state in Sn-132 and of extensive (nuf(7/2)h(11/2)(-2)) (nuf(7/2)d(3/2)(-1)h(11/2)(-1)) and (nuh(11/2)(-1) x 3(-)) multiplets in Sn-131. The previously reported beta (-) decay of an unusual In-131 high-spin isomer to levels in Sn-131 is also elucidated. C1 Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA. Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA. H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Royal Inst Technol, Dept Phys Frescati, S-10405 Stockholm, Sweden. RP Saha, SK (reprint author), Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA. RI Carpenter, Michael/E-4287-2015 OI Carpenter, Michael/0000-0002-3237-5734 NR 11 TC 22 Z9 23 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 AUG 6 PY 2001 VL 87 IS 6 AR 062502 DI 10.1103/PhysRevLett.87.062502 PG 4 WC Physics, Multidisciplinary SC Physics GA 460LZ UT WOS:000170310200010 PM 11497825 ER PT J AU Chernyshev, AL Chen, YC Castro Neto, AH AF Chernyshev, AL Chen, YC Castro Neto, AH TI Long-range order and low-energy spectrum of diluted 2D quantum antiferromagnet SO PHYSICAL REVIEW LETTERS LA English DT Article ID HEISENBERG-ANTIFERROMAGNET; NQR RELAXATION; SQUARE LATTICE; SPIN-WAVES; LA2CUO4; IMPURITIES; STATES; HOLES AB The problem of a diluted two-dimensional quantum antiferromagnet on a square lattice is studied using spin-wave theory. The influence of impurities on static and dynamic properties is investigated and a good agreement with experiments and Monte Carlo data is found. The hydrodynamic description of spin waves breaks down at characteristic wavelengths Lambda greater than or similar to exp(const/x), x being an impurity concentration, while the order parameter is free from anomalies. We argue that this dichotomy originates from strong scattering of the low-energy excitations in two dimensions. C1 Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. Russian Acad Sci, Inst Semicond Phys, Novosibirsk 630090, Russia. RP Chernyshev, AL (reprint author), Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA. RI Chen, Yu-Chang/C-6012-2008; Castro Neto, Antonio/C-8363-2014 OI Chen, Yu-Chang/0000-0001-8115-7189; Castro Neto, Antonio/0000-0003-0613-4010 NR 27 TC 22 Z9 22 U1 1 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 6 PY 2001 VL 87 IS 6 AR 067209 DI 10.1103/PhysRevLett.87.067209 PG 4 WC Physics, Multidisciplinary SC Physics GA 460LZ UT WOS:000170310200043 PM 11497858 ER PT J AU Ivanov, IA Mitroy, J Varga, K AF Ivanov, IA Mitroy, J Varga, K TI Elastic positronium-atom scattering using the stochastic variational method SO PHYSICAL REVIEW LETTERS LA English DT Article ID FEW-BODY PROBLEMS; HELIUM; ANNIHILATION; GASES; MOMENTUM AB The stochastic variational method is used in conjunction with stabilization ideas to compute the low energy phase shifts and scattering lengths for positronium-atom scattering. Results are obtained for the Ps-H, Ps-Li(+), Ps-He, and Ps-Ps systems. The Ps-H scattering lengths are probably accurate to better than 5% and are the most accurate so far computed. The results for Ps-Li(+) and Ps-Ps scattering represent the first published scattering lengths for these systems. The positive scattering length for completely spin-aligned (3)Ps-(3)Ps scattering, namely 2.95a(o), is particularly significant since it demonstrates the feasibility of forming a stable Bose-Einstein condensate of (3)Ps atoms. C1 No Terr Univ, Fac Sci, Darwin, NT 0909, Australia. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. RP Ivanov, IA (reprint author), No Terr Univ, Fac Sci, Darwin, NT 0909, Australia. RI Mitroy, Jim/B-6371-2009; Varga, Kalman/A-7102-2013; Mitroy, James/N-2162-2013; Ivanov, Igor/F-8462-2014; OI Mitroy, James/0000-0002-2477-1251; Ivanov, Igor/0000-0003-3856-1658 NR 34 TC 59 Z9 60 U1 1 U2 7 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 6 PY 2001 VL 87 IS 6 AR 063201 DI 10.1103/PhysRevLett.87.063201 PG 4 WC Physics, Multidisciplinary SC Physics GA 460LZ UT WOS:000170310200012 PM 11497827 ER PT J AU MacLaughlin, DE Bernal, OO Heffner, RH Nieuwenhuys, GJ Rose, MS Sonier, JE Andraka, B Chau, R Maple, MB AF MacLaughlin, DE Bernal, OO Heffner, RH Nieuwenhuys, GJ Rose, MS Sonier, JE Andraka, B Chau, R Maple, MB TI Glassy spin dynamics in non-fermi-liquid UCu5-xPdx, x=1.0 and 1.5 SO PHYSICAL REVIEW LETTERS LA English DT Article ID KONDO DISORDER; BEHAVIOR; SYSTEMS; RELAXATION; PHASE; NMR AB Local f-electron spin dynamics in the non-Fermi-liquid heavy-fermion alloys UCu5-xPdx, x = 1.0 and 1.5, have been studied using muon spin-lattice relaxation. The sample-averaged asymmetry function (G) over bar (t) indicates strongly inhomogeneous spin fluctuations and exhibits the scaling (G) over bar (t, H) = (G) over bar (t/H-gamma) expected from glassy dynamics. At 0.05 K gamma (x = 1.0) = 0.35 +/- 0.1, but gamma (x = 1.5) = 0.7 +/- 0.1. This is in contrast to inelastic neutron scattering results, which yield gamma = 0.33 for both concentrations. There is no sign of static magnetism greater than or similar to 10(-3) mu (B)/U ion in either material above 0.05 K. Our results strongly suggest that both alloys are quantum spin glasses. C1 Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA. Calif State Univ Los Angeles, Dept Phys, Los Angeles, CA 90032 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Leiden Univ, Kamerlingh Onnes Lab, NL-2300 RA Leiden, Netherlands. Univ Florida, Dept Phys, Gainesville, FL 32611 USA. Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA. RP Sonier, JE (reprint author), Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA. NR 21 TC 32 Z9 32 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 AUG 6 PY 2001 VL 87 IS 6 AR 066402 DI 10.1103/PhysRevLett.87.066402 PG 4 WC Physics, Multidisciplinary SC Physics GA 460LZ UT WOS:000170310200021 PM 11497836 ER PT J AU Mahadevan, P Terakura, K Sarma, DD AF Mahadevan, P Terakura, K Sarma, DD TI Spin, charge, and orbital ordering in La0.5Sr1.5MnO4 SO PHYSICAL REVIEW LETTERS LA English DT Article ID X-RAY-SCATTERING; JAHN-TELLER DISTORTION; MAGNETIC ORDER; MANGANITES; LAMNO3; OXIDES; PHASE AB We have analyzed the experimental evidence of charge and orbital ordering in La0.5Sr1.5MnO4 using first principles band structure calculations. Our results suggest the presence of two types of Mn sites in the system. One of the Mn sites behaves as an Mn3+ ion, favoring a Jahn-Teller distortion of the surrounding oxygen atoms, while the distortion around the other is not a simple breathing mode kind. Band structure effects are found to dominate the experimental spectrum for orbital and charge ordering, providing an alternate explanation for the experimentally observed results. C1 JRCAT, Tsukuba, Ibaraki 3050046, Japan. AIST, Tsukuba, Ibaraki 3050046, Japan. JRCAT, Tsukuba, Ibaraki 3058562, Japan. RICS, AIST, Tsukuba, Ibaraki 3058568, Japan. Indian Inst Sci, SSCU, Bangalore 560012, Karnataka, India. RP Mahadevan, P (reprint author), NREL, Golden, CO 80401 USA. RI Sarma, D. D./B-2576-2010 OI Sarma, D. D./0000-0001-6433-1069 NR 30 TC 50 Z9 50 U1 1 U2 10 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 AUG 6 PY 2001 VL 87 IS 6 AR 066404 DI 10.1103/PhysRevLett.87.066404 PG 4 WC Physics, Multidisciplinary SC Physics GA 460LZ UT WOS:000170310200023 PM 11497838 ER PT J AU Martinez-Pinedo, G Schwerdtfeger, P Caurier, E Langanke, K Nazarewicz, W Sohnel, T AF Martinez-Pinedo, G Schwerdtfeger, P Caurier, E Langanke, K Nazarewicz, W Sohnel, T TI Nuclear quadrupole moment of Fe-57 from microscopic nuclear and atomic calculations SO PHYSICAL REVIEW LETTERS LA English DT Article ID SHELL-MODEL CALCULATION AB The nuclear quadrupole moment (NQM) of the I-pi = 3/2(-) excited nuclear state of Fe-57 at 14.41 keV, important in Mossbauer spectroscopy, is determined from the large-scale nuclear shell-model calculations or Fe-54, Fe-57, and also from the electronic ab initio and density functional theory calculations including solid state and electron correlation effects for the molecules Fe(CO)(5) and Fe(C5H5)(2). Both independent methods yield very similar results. The recommended value is 0.15 (2) e b. The NQM of the isomeric 10+ in Fe-54 has also been calculated. The new NQM values for Fe-54 and Fe-57 are consistent with the perturbed angular distribution data. C1 Aarhus Univ, Inst Fys & Astron, DK-8000 Aarhus C, Denmark. Univ Basel, Dept Phys & Astron, Basel, Switzerland. Univ Auckland, Dept Chem, Auckland, New Zealand. Univ Strasbourg 1, CNRS, IN2P3, Inst Rech Subatom, F-67037 Strasbourg, France. Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Warsaw, Inst Theoret Phys, PL-00681 Warsaw, Poland. RP Martinez-Pinedo, G (reprint author), Aarhus Univ, Inst Fys & Astron, DK-8000 Aarhus C, Denmark. RI Sohnel, Tilo/C-9321-2009; Martinez-Pinedo, Gabriel/A-1915-2013 OI Martinez-Pinedo, Gabriel/0000-0002-3825-0131 NR 28 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 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 6 PY 2001 VL 87 IS 6 AR 062701 DI 10.1103/PhysRevLett.87.062701 PG 4 WC Physics, Multidisciplinary SC Physics GA 460LZ UT WOS:000170310200011 PM 11497826 ER PT J AU Rischke, DH Son, DT Stephanov, MA AF Rischke, DH Son, DT Stephanov, MA TI Asymptotic deconfinement in high-density QCD SO PHYSICAL REVIEW LETTERS LA English DT Article ID COLOR-FLAVOR-LOCKING; LATTICE GAUGE-THEORY; QUARK MATTER; BARYON DENSITY; SUPERCONDUCTIVITY; TEMPERATURE; PHASE; LIMIT AB We discuss QCD with two light flavors at large baryon chemical potential A. Color superconductivity leads to partial breaking of the color SU(3) group. We show that the infrared physics is governed by the gluodynamics of the remaining SU(2) group with an exponentially soft confinement scale Lambda'(QCD) similar to Delta exp[- a mu/(g Delta)], where Delta << mu is the superconducting gap, g is the strong coupling, and a = 2 root2 pi /11. We estimate that, at moderate baryon densities, Lambda'(QCD) is O(10 MeV) or smaller. The confinement radius increases exponentially with density, leading to "asymptotic deconfinement." The velocity of the SU(2) gluons is small due to the large dielectric constant of the medium. C1 Brookhaven Natl Lab, Nucl Theory Grp, Upton, NY 11973 USA. Columbia Univ, Dept Phys, New York, NY 10027 USA. Univ Illinois, Dept Phys, Chicago, IL 60607 USA. Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA. RP Rischke, DH (reprint author), Brookhaven Natl Lab, Nucl Theory Grp, Upton, NY 11973 USA. NR 30 TC 52 Z9 52 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 AUG 6 PY 2001 VL 87 IS 6 AR 062001 DI 10.1103/PhysRevLett.87.062001 PG 4 WC Physics, Multidisciplinary SC Physics GA 460LZ UT WOS:000170310200008 PM 11497823 ER PT J AU Zasadzinski, JF Ozyuzer, L Miyakawa, N Gray, KE Hinks, DG Kendziora, C AF Zasadzinski, JF Ozyuzer, L Miyakawa, N Gray, KE Hinks, DG Kendziora, C TI Correlation of tunneling spectra in Bi2Sr2CaCu2O8+delta with the resonance spin excitation SO PHYSICAL REVIEW LETTERS LA English DT Article ID PREDOMINANTLY SUPERCONDUCTING ORIGIN; LARGE ENERGY GAPS; UNDERDOPED BI2SR2CACU2O8+DELTA; OVERDOPED BI2SR2CACU2O8+DELTA; SINGLE-CRYSTALS; QUASI-PARTICLE; SPECTROSCOPY; STATES; TEMPERATURE; DENSITY AB New break-junction tunneling data are reported in Bi2Sr2CaCu2O8+delta over a wide range of hole concentration from underdoped (T-c = 74 K) to optimal doped (T-c = 95 K) to overdoped (T-c = 48 K). The conductances exhibit sharp dips at a voltage, Omega /e, measured with respect to the superconducting gap. Clear trends are found such that the dip strength is maximum at optimal doping and that fl scales as 4.9 kT(c) over the entire doping range. These features link the dip to the resonance spin excitation and suggest quasiparticle interactions with this mode are important for superconductivity. C1 IIT, Div Phys, Chicago, IL 60616 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Izmir Inst Technol, Dept Phys, TR-35437 Izmir, Turkey. Tokyo Univ Sci, Dept Appl Phys, Tokyo 162, Japan. USN, Res Lab, Washington, DC 20375 USA. RP Zasadzinski, JF (reprint author), IIT, Div Phys, Chicago, IL 60616 USA. RI Ozyuzer, Lutfi/H-3142-2011 NR 27 TC 129 Z9 129 U1 0 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 6 PY 2001 VL 87 IS 6 AR 067005 DI 10.1103/PhysRevLett.87.067005 PG 4 WC Physics, Multidisciplinary SC Physics GA 460LZ UT WOS:000170310200032 PM 11497847 ER PT J AU Chantler, CT Tran, CQ Paterson, D Cookson, D Barnea, Z AF Chantler, CT Tran, CQ Paterson, D Cookson, D Barnea, Z TI X-ray extended-range technique for precision measurement of the X-ray mass attenuation coefficient and Im(f) for copper using synchrotron radiation SO PHYSICS LETTERS A LA English DT Article ID ABSORPTION FINE-STRUCTURE; MATCHED ION CHAMBERS; CROSS-SECTIONS; MONITORING FLUCTUATIONS; ANOMALOUS SCATTERING; INTERNATIONAL-UNION; DIFFERENCE METHOD; FORM-FACTOR; SILICON; DIFFRACTION AB We reconsider the long-standing problem of accurate measurement of atomic form factors for fundamental and applied problems. We discuss the X-ray extended-range technique for accurate measurement of the mass attenuation coefficient and the imaginary component of the atomic form factor. Novelties of this approach include the use of a synchrotron with detector normalisation, the direct calibration of dominant systematics using multiple thicknesses, and measurement over wide energy ranges with a resulting improvement of accuracies by an order of magnitude. This new technique achieves accuracies of 0.27-0.5% and reproducibility of 0.02% for attenuation of copper from 8.84 to 20 keV, compared to accuracies of 10% using atomic vapours. This precision challenges available theoretical calculations. Discrepancies of 10% between current theory and experiments can now be addressed. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia. Argonne Natl Lab, Chem Mat CARS CAT, Argonne, IL 60439 USA. Australian Nucl Sci & Technol Org, Menai, NSW 2234, Australia. RP Chantler, CT (reprint author), Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia. RI Chantler, Christopher/D-4744-2013; Tran, Chanh/M-7868-2015 OI Chantler, Christopher/0000-0001-6608-0048; NR 52 TC 37 Z9 37 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9601 J9 PHYS LETT A JI Phys. Lett. A PD AUG 6 PY 2001 VL 286 IS 5 BP 338 EP 346 DI 10.1016/S0375-9601(01)00444-3 PG 9 WC Physics, Multidisciplinary SC Physics GA 464NH UT WOS:000170538300005 ER PT J AU Wang, P Dai, S Waezsada, SD Tsao, AY Davison, BH AF Wang, P Dai, S Waezsada, SD Tsao, AY Davison, BH TI Enzyme stabilization by covalent binding in nanoporous sol-gel glass for nonaqueous biocatalysis SO BIOTECHNOLOGY AND BIOENGINEERING LA English DT Article DE nonaqueous biocatalysis; sol-gel silica glass; alpha-chymotrypsin; organic solvents; enzyme immobilization ID ORGANIC-SOLVENTS; ALPHA-CHYMOTRYPSIN; MESOPOROUS SILICA; STABILITY; POLYMERS; SURFACTANT; SUPPORT; LIPASE AB A unique nanoporous sol-gel glass possessing a highly ordered porous structure (with a pore size of 153 Angstrom in diameter) was examined for use as a support material for enzyme immobilization. A model enzyme, a-chymotrypsin, was efficiently bound onto the glass via a bifunctional ligand, trimethoxysilylpropanal, with an active enzyme loading of 0.54 wt%. The glass-bound chymotrypsin exhibited greatly enhanced stability both in aqueous solution and organic solvents. The half-life of the glass-bound alpha -chymotrypsin was >1000-fold higher than that of the native enzyme, as measured either in aqueous buffer or anhydrous methanol. The enhanced stability in methanol, which excludes the possibility of enzyme autolysis, particularly reflected that the covalent binding provides effective protection against enzyme inactivation caused by structural denaturation. In addition, the activity of the immobilized alpha -chymotrypsin was also much higher than that of the native enzyme in various organic solvents. From these results, it appears that the glass-enzyme complex developed in the present work can be used as a high-performance biocatalyst for various chemical processing applications, particularly in organic media. C1 Oak Ridge Natl Lab, Div Chem Technol, Oak Ridge, TN 37831 USA. Univ Akron, Dept Chem Engn, Akron, OH 44325 USA. RP Davison, BH (reprint author), Oak Ridge Natl Lab, Div Chem Technol, Oak Ridge, TN 37831 USA. RI Davison, Brian/D-7617-2013; Dai, Sheng/K-8411-2015 OI Davison, Brian/0000-0002-7408-3609; Dai, Sheng/0000-0002-8046-3931 NR 32 TC 140 Z9 147 U1 7 U2 43 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0006-3592 J9 BIOTECHNOL BIOENG JI Biotechnol. Bioeng. PD AUG 5 PY 2001 VL 74 IS 3 BP 249 EP 255 DI 10.1002/bit.1114 PG 7 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA 449KP UT WOS:000169684000007 PM 11400098 ER PT J AU Boyukata, M Guvenc, ZB Ozcelik, S Durmus, P Jellinek, J AF Boyukata, M Guvenc, ZB Ozcelik, S Durmus, P Jellinek, J TI Structure and reactivity of Ni(n) (n=7-14, 19) clusters SO INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY LA English DT Article DE nickel clusters; structure; reactivity; diatomic molecule; molecular dynamics ID TRANSITION-METAL CLUSTERS; NICKEL CLUSTERS; DISSOCIATIVE CHEMISORPTION; D2; H-2; DEPENDENCE; DEUTERIUM; DYNAMICS; SURFACES; ISOMERS AB Results of a computer simulation study of Ni(n) (n = 7-14, 19) clusters, their structures, energetics, and reactivity with a D(2) molecule are presented. The clusters are described by an embedded atom potential, whereas the interaction between the molecule and the clusters is modeled by an LEPS (London-Eyring-Polanyi-Sato) potential energy function. The focus is on structures of the dusters and their reactive channels. The total numbers of stable isomers of the clusters are obtained by sampling their phase space, and the isomers' energy spectra are determined. On the reactive side, dissociative chemisorptions cross sections and decay-rate constants are calculated. (C) 2001 John Wiley & Sons, Inc. C1 Cankaya Univ, Dept Comp Engn, TR-06530 Ankara, Turkey. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. Univ Massachusetts, Dept Chem, Amherst, MA 01003 USA. Erciyes Univ, Dept Phys, Yozgat, Turkey. Gazi Univ, Dept Phys, TR-06500 Ankara, Turkey. RP Guvenc, ZB (reprint author), Cankaya Univ, Dept Comp Engn, TR-06530 Ankara, Turkey. EM guvenc@cankaya.edu.tr RI Ozcelik, Suleyman/J-6494-2014 OI Ozcelik, Suleyman/0000-0002-3761-3711 NR 25 TC 18 Z9 18 U1 1 U2 5 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0020-7608 J9 INT J QUANTUM CHEM JI Int. J. Quantum Chem. PD AUG 5 PY 2001 VL 84 IS 2 BP 208 EP 215 DI 10.1002/qua.1323 PG 8 WC Chemistry, Physical; Mathematics, Interdisciplinary Applications; Physics, Atomic, Molecular & Chemical SC Chemistry; Mathematics; Physics GA 451BN UT WOS:000169781400007 ER PT J AU Chiarelli, PA Johal, MS Casson, JL Roberts, JB Robinson, JM Wang, HL AF Chiarelli, PA Johal, MS Casson, JL Roberts, JB Robinson, JM Wang, HL TI Controlled fabrication of polyelectrolyte multilayer thin films using spin-assembly SO ADVANCED MATERIALS LA English DT Article ID COATED POLYMER-FILMS; SOLVENT-EVAPORATION; THICKNESS; DEPOSITION; AZOBENZENE; TOPOGRAPHY AB Spin-assembly is an excellent method for controlling the amount and thickness of adsorbed polyelectrolyte in fabricating multilayer thin films. These films are investigated by means of ellipsometry and UV-vis spectroscopy and their spectral properties are used to determine the effect of the polyelectrolyte concentration, the speed of rotation, and other experimental parameters on the film thickness and uniformity. Adjusting these parameters allows fine-tuning of the multilayer thin films and provides the spin-assembly method with a control tool for many future applications. C1 Los Alamos Natl Lab, Div Biosci, Los Alamos, NM 87545 USA. Pomona Coll, Dept Chem, Claremont, CA 91711 USA. Univ S Florida, New Coll, Div Nat Sci, Sarasota, FL 34243 USA. Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. RP Wang, HL (reprint author), Los Alamos Natl Lab, Div Biosci, MS J586, Los Alamos, NM 87545 USA. NR 31 TC 148 Z9 150 U1 5 U2 68 PU WILEY-V C H VERLAG GMBH PI BERLIN PA PO BOX 10 11 61, D-69451 BERLIN, GERMANY SN 0935-9648 J9 ADV MATER JI Adv. Mater. PD AUG 3 PY 2001 VL 13 IS 15 BP 1167 EP + DI 10.1002/1521-4095(200108)13:15<1167::AID-ADMA1167>3.0.CO;2-A 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 464JL UT WOS:000170529400009 ER PT J AU Pang, YP Xu, K Kollmeyer, TM Perola, E McGrath, WJ Green, DT Mangel, WF AF Pang, YP Xu, K Kollmeyer, TM Perola, E McGrath, WJ Green, DT Mangel, WF TI Discovery of a new inhibitor lead of adenovirus proteinase: steps toward selective, irreversible inhibitors of cysteine proteinases SO FEBS LETTERS LA English DT Article DE computational screening; in silico screening; structure-based drug design; molecular docking; antiviral agent; cysteine proteinase inhibitor; drug discovery; development ID NITRIC-OXIDE; MIXED DISULFIDES; CONJUNCTIVITIS; PROTEASE; PEPTIDE; PAPAIN; ACID AB Using the computer docking program EUDOC, in silico screening of a chemical database for inhibitors of human adenovirus cysteine proteinase (hAVCP) identified 2,4,5,7-tetranitro-9-fluorenone that selectively and irreversibly inhibits hAVCP in a two-step reaction: reversible binding (K-i = 3.09 muM) followed by irreversible inhibition (k(i) = 0.006 s(-1)). The reversible binding is due to molecular complementarity between the inhibitor and the active site of hAVCP, which confers the selectivity of the inhibitor. The irreversible inhibition is due to substitution of a nitro group of the inhibitor by the nearby Cys122 in the active site of hAVCP. These findings suggest a new approach to selective, irreversible inhibitors of cysteine proteinases involved in normal and abnormal physiological processes ranging from embryogenesis to apoptosis and pathogen invasions. (C) 2001 Published by Elsevier Science B.V. on behalf of the Federation of European Biochemical Societies. C1 Mayo Fdn Med Educ & Res, Mayo Clin Canc Ctr, Rochester, MN 55905 USA. Mayo Fdn Med Educ & Res, Tumor Biol Program, Rochester, MN 55905 USA. Mayo Fdn Med Educ & Res, Dept Mol Pharmacol & Expt Therapeut, Rochester, MN 55905 USA. Mayo Fdn Med Educ & Res, Mol Neurosci Program, Rochester, MN 55905 USA. Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. RP Pang, YP (reprint author), Mayo Fdn Med Educ & Res, Mayo Clin Canc Ctr, 200 1st St SW, Rochester, MN 55905 USA. OI Pang, Yuan-Ping/0000-0003-0838-2560 FU NCI NIH HHS [CA75926]; NIAID NIH HHS [AI41599] NR 26 TC 34 Z9 35 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0014-5793 J9 FEBS LETT JI FEBS Lett. PD AUG 3 PY 2001 VL 502 IS 3 BP 93 EP 97 DI 10.1016/S0014-5793(01)02672-2 PG 5 WC Biochemistry & Molecular Biology; Biophysics; Cell Biology SC Biochemistry & Molecular Biology; Biophysics; Cell Biology GA 462VV UT WOS:000170441200005 PM 11583118 ER PT J AU Samuel, BU Mohandas, N Harrison, T McManus, H Rosse, W Reid, M Haldar, K AF Samuel, BU Mohandas, N Harrison, T McManus, H Rosse, W Reid, M Haldar, K TI The role of cholesterol and glycosylphosphatidylinositol-anchored proteins of erythrocyte rafts in regulating raft protein content and malarial infection SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID TERMINAL COMPLEMENT COMPLEXES; PLASMA-MEMBRANE CHOLESTEROL; PLASMODIUM-FALCIPARUM; CELL-SURFACE; TYROSINE PHOSPHORYLATION; BIOLOGICAL-MEMBRANES; BETA-CYCLODEXTRIN; GLYCOPHORIN-A; INVASION; MICRODOMAINS AB Human erythrocytes are terminally differentiated, non-endocytic cells that lack all intracellular organelles. Here we show that their plasma membranes contain detergent-resistant membrane rafts that constitute a small fraction (4%) of the total membrane protein, with a complex mixture of proteins that differentially associate with rafts. Depletion of raft-cholesterol abrogates association of all proteins with no significant effect on cholesterol:protein ratios in the rest of the membrane, lipid asymmetry, deformability, or transport properties of the bilayer, indicating that cholesterol is critical for protein assembly into rafts and suggesting that rafts have little influence on several erythrocyte functions. Erythrocytes from patients with paroxysmal nocturnal hemoglobinuria, which lack glycosylphosphatidylinositol-anchored proteins, show significant elevation in raft-cholesterol but no increase in raft protein association, suggesting that raft assembly does not require glycosylphosphatidylinositol-anchored proteins, raft proteins do not bind directly to cholesterol, and only threshold levels of raft-cholesterol are critical for protein recruitment. Loss of glycosylphosphatidylinositol-anchored proteins had no effect on erythrocytic infection by malarial parasite or movement of raft markers into the parasite's vacuole. However, infection is blocked following raft-cholesterol disruption, suggesting that erythrocyte rafts can be functionally exploited and providing the first evidence for the involvement of host rafts in an apicomplexan infection. C1 Northwestern Univ, Sch Med, Dept Pathol, Chicago, IL 60611 USA. Northwestern Univ, Sch Med, Dept Microbiol Immunol, Chicago, IL 60611 USA. Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. Duke Univ, Med Ctr, Dept Med, Div Hematol, Durham, NC 27710 USA. New York Blood Ctr, New York, NY 10021 USA. RP Haldar, K (reprint author), Northwestern Univ, Sch Med, Dept Pathol, 303 E Chicago Ave,Ward 3210, Chicago, IL 60611 USA. RI Haldar, Kasturi/C-6685-2014 FU NIAID NIH HHS [AI39071]; NIDDK NIH HHS [DK 32094] NR 49 TC 126 Z9 129 U1 0 U2 3 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 USA SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD AUG 3 PY 2001 VL 276 IS 31 BP 29319 EP 29329 DI 10.1074/jbc.M101268200 PG 11 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 461BX UT WOS:000170346000092 PM 11352913 ER PT J AU Kaczmarski, K Antos, D Sajonz, H Sajonz, P Guiochon, G AF Kaczmarski, K Antos, D Sajonz, H Sajonz, P Guiochon, G TI Comparative modeling of breakthrough curves of bovine serum albumin in anion-exchange chromatography SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article DE kinetic studies; general rate model; lumped pore diffusion model; transport-dispersive model; equilibrium-dispersive model; mathematical modeling; mass transfer; breakthrough volumes; dispersion; albumin ID CONCENTRATION-DEPENDENCE; PROTEIN ADSORPTION; LIGHT-SCATTERING; MASS-TRANSFER; DIFFUSION; COEFFICIENT; SIMULATION; DESORPTION; SINGLE AB The experimental results of a previous study of the mass transfer kinetics of bovine serum albumin (BSA) in ion-exchange chromatography, under nonlinear conditions, were reevaluated using the general rate model of chromatography. Solutions of this model were obtained numerically. The influences of axial dispersion, the resistance to mass transfer from the bulk mobile phase to the surface of the packing particles, and the intraparticle mass transfer resistances on the profiles of the breakthrough curves of BSA were investigated. The results obtained are compared to those of a previous investigation of the same data, using the simple transport-dispersive model and the lumped pore diffusion model. The results obtained show that the use of an oversimplified model for the analysis of chromatographic data can lead to erroneous interpretations of the experimental data and to misunderstandings of the fundamentals of the processes involved. Finally, a theoretical comparison between the properties and the range of application of the three models is provided. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem & Analyt Sci, Oak Ridge, TN 37831 USA. Rzeszow Univ Technol, Fac Chem, PL-35959 Rzeszow, Poland. RP Guiochon, G (reprint author), Univ Tennessee, Dept Chem, 552 Buehler Hall, Knoxville, TN 37996 USA. NR 27 TC 85 Z9 88 U1 3 U2 19 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR A JI J. Chromatogr. A PD AUG 3 PY 2001 VL 925 IS 1-2 BP 1 EP 17 DI 10.1016/S0021-9673(01)01035-4 PG 17 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA 462QW UT WOS:000170432100001 PM 11519795 ER PT J AU Shediac, R Ngola, SM Throckmorton, DJ Anex, DS Shepodd, TJ Singh, AK AF Shediac, R Ngola, SM Throckmorton, DJ Anex, DS Shepodd, TJ Singh, AK TI Reversed-phase electrochromatography of amino acids and peptides using porous polymer monoliths SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article DE electrochromatography; monolithic columns; stationary phases, electrochromatography; derivatization, electrochromatography; chip technology; amino acids; peptides ID PERFORMANCE LIQUID-CHROMATOGRAPHY; FLIGHT MASS DETECTOR; CAPILLARY ELECTROCHROMATOGRAPHY; SEPARATION MEDIA; STATIONARY PHASES; ELECTROPHORETIC MOBILITIES; FLUORESCENCE DETECTION; CONTINUOUS BEDS; PROTEINS; DERIVATIZATION AB Efficient and rapid separation of minute levels of amino acids and bioactive peptides is of significant importance in the emerging field of proteomics as well as in the clinical and pharmaceutical arena. We have developed novel UV-initiated acrylate-based porous polymer monoliths as stationary phases for capillary- and chip-electrochromatography of cationic, anionic, and neutral amino acids and peptides, followed by absorbance or laser-induced fluorescence detection. The rigid monoliths are cast-to-shape and are tunable for charge and hydrophobicity. For separations at low pH, monoliths containing quaternary amine moieties were used to achieve high electroosmotic flow, and for high pH separations monoliths with acidic sulfonic acid groups were employed. Efficient and reproducible separations of phenylthiohydantoin-labeled amino acids, native peptides, and amino acids and peptides labeled with naphthalene-2,3-dicarboxaldehyde (NDA) were achieved using both negatively- and positively-charged polymer monoliths in capillaries. Separation efficiencies in the range of 65 000-371 000 plates/m were obtained with capillary electrochromatography. Buffer composition and the degree of column hydrophobicity were studied systematically to optimize separations. The monoliths were also cast in the microchannels of glass chips and electrochromatographic separation followed by laser-induced fluorescence detection of three NDA-labeled bioactive peptides was obtained. (C) 2001 Elsevier Science BY All rights reserved. C1 Sandia Natl Labs, Chem & Radiat Detect Labs, Livermore, CA 94551 USA. RP Singh, AK (reprint author), Sandia Natl Labs, Chem & Radiat Detect Labs, Mailstop 9951, Livermore, CA 94551 USA. NR 38 TC 90 Z9 94 U1 2 U2 18 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR A JI J. Chromatogr. A PD AUG 3 PY 2001 VL 925 IS 1-2 BP 251 EP 263 DI 10.1016/S0021-9673(01)01036-6 PG 13 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA 462QW UT WOS:000170432100023 PM 11519810 ER PT J AU Lammerhofer, M Svec, F Frechet, JMJ Lindner, W AF Lammerhofer, M Svec, F Frechet, JMJ Lindner, W TI Capillary electrochromatography in anion-exchange and normal-phase mode using monolithic stationary phases SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article DE stationary phases, electrochromatograpy; electrochromatography; monoliths; profens; benzoic acids; porous polymers ID PERFORMANCE LIQUID-CHROMATOGRAPHY; CONTINUOUS POLYMER BEDS; SEPARATION MEDIA; QUINIDINE FUNCTIONALITY; MACROPOROUS POLYMERS; CHIRAL SEPARATIONS; POROUS PROPERTIES; COLUMNS; PROTEINS; FLOW AB Hydrophilic macroporous weak and strong anion-exchange stationary phases have been prepared in a monolithic format within untreated fused-silica capillaries by the simple thermally or UV-initiated polymerization of 2-dimethylaminoethyl methacrylate, 2-hydroxyethyl methacrylate and ethylene dimethacrylate in the presence of a binary porogenic mixture of dodecanol and cyclohexanol. The tertiary amino functionalities were then alkylated in situ to afford strong anion-exchangers. These new monolithic stationary phases with optimized porous properties were used for the CEC separation of various organic anions. Thus, a mixture of 2-substituted propionic acid drugs (profens) was separated in 13 min and high column efficiencies of up to 231 000 plates/m were achieved. The separation of substituted benzoic acids indicates that the selectivity results primarily from the anion-exchange interactions, while electrophoretic migration contributes only slightly. In addition, these hydrophilic anion-exchangers are also able to separate weakly acidic, neutral and basic compounds such as phenols, xanthines and aromatic amines in normal-phase electrochromatographic mode. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EO Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Vienna, Inst Analyt Chem, A-1090 Vienna, Austria. RP Frechet, JMJ (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. OI Frechet, Jean /0000-0001-6419-0163 FU NIGMS NIH HHS [GM-48364] NR 38 TC 96 Z9 99 U1 1 U2 20 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR A JI J. Chromatogr. A PD AUG 3 PY 2001 VL 925 IS 1-2 BP 265 EP 277 DI 10.1016/S0021-9673(01)01034-2 PG 13 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA 462QW UT WOS:000170432100024 PM 11519811 ER PT J AU Hathorn, BC Sumpter, BG Noid, DW AF Hathorn, BC Sumpter, BG Noid, DW TI On the distribution of fragment sizes in the fragmentation of polymer chains SO MACROMOLECULAR THEORY AND SIMULATIONS LA English DT Article ID THERMAL-DEGRADATION; MOLECULAR-DYNAMICS; POLYETHYLENE AB The fragmentation pattern of a single-step cleavage of a polymer is calculated using a simple model based on Transition State Theory to describe the distribution of fragment sizes. Subsequent molecular fragmentations can be simulated by repeated application of the model. The results for the fragmentation pattern are compared to those observed for molecular dynamics calculations performed at high temperatures. Calculated fragmentation pattern for a polymer with 100 units after 15 timesteps with a 15% fragmentation rate at each timestep. The point at 100 monomer units represents the residual of the parent peak after 15 successive fractionations. [GRAPHICS] C1 Oak Ridge Natl Lab, Div Chem & Analyt Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. RP Noid, DW (reprint author), Oak Ridge Natl Lab, Div Chem & Analyt Sci, Oak Ridge, TN 37831 USA. RI Sumpter, Bobby/C-9459-2013 OI Sumpter, Bobby/0000-0001-6341-0355 NR 15 TC 5 Z9 5 U1 0 U2 1 PU WILEY-V C H VERLAG GMBH PI BERLIN PA PO BOX 10 11 61, D-69451 BERLIN, GERMANY SN 1022-1344 J9 MACROMOL THEOR SIMUL JI Macromol. Theory Simul. PD AUG 3 PY 2001 VL 10 IS 6 BP 587 EP 591 DI 10.1002/1521-3919(20010701)10:6<587::AID-MATS587>3.0.CO;2-P PG 5 WC Polymer Science SC Polymer Science GA 464JD UT WOS:000170528700004 ER PT J AU Shkrob, IA Liu, AD Sauer, MC Trifunac, AD AF Shkrob, IA Liu, AD Sauer, MC Trifunac, AD TI High mobility solvent holes in methylcyclohexane SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID REVERSIBLE-REACTIONS; CYCLOALKANE LIQUIDS; RADICAL-CATION; TRANS-DECALIN(CENTER-DOT+); CIS-DECALIN(CENTER-DOT+) AB Using time-resolved dc photoconductivity, the migration patterns and reactions of solvent hole in liquid methylcyclohexane between 230 and 350 K have been studied. It is shown that solvent holes in liquid methylcyclohexane are reversibly scavenged by solutes whose liquid-state ionization potentials are 0.2-0.3 eV below that of the solvent. The reversible electron transfer is driven mainly by the reaction heat (60-90%); further decrease in the free energy is due to increase, in entropy following the destruction of solvent structure around the hole. Between 133 and 360 K, the solvent hole diffuses with activation energy of 7.8 kJ/mol; the fastest electron-transfer reactions (ca. 8.7 x, 10(10) M-1 s(-1) at 25 degreesC) have activation energies between 3.9 and 5.3 kJ/mol (250 to 350 K). Unusually large scavenging radii, 1.5-3 run, were obtained for these charge-transfer reactions. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Shkrob, IA (reprint author), Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. NR 16 TC 1 Z9 1 U1 1 U2 1 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 AUG 2 PY 2001 VL 105 IS 30 BP 7211 EP 7215 DI 10.1021/jp003052j PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 457TJ UT WOS:000170152700011 ER PT J AU Dimitrijevic, NM Takahashi, K Bartels, DM Jonah, CD AF Dimitrijevic, NM Takahashi, K Bartels, DM Jonah, CD TI Pulse radiolysis studies of solvated electrons in supercritical ethane with methanol as cosolvent SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID CARBON-DIOXIDE; FLUIDS; DYNAMICS; PROPANE; CO2 AB Pulse radiolysis has been used to study the solvated electron in supercritical ethane with methanol as a cosolvent. These measurements give information about the liquid structure of the cosolvent in these systems. The results show that at temperatures below 110 degreesC, there are high local concentrations of alcohol molecules (clusters), which are capable of solvating an electron. The agglomeration number of methanol clusters depends on mole fraction of alcohol at a fixed temperature. Addition of salts increases the size of methanol clusters. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Jonah, CD (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Takahashi, Kenji/C-8846-2011; Takahashi, Kenji/F-4885-2014 NR 22 TC 13 Z9 14 U1 1 U2 2 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 AUG 2 PY 2001 VL 105 IS 30 BP 7236 EP 7240 DI 10.1021/jp010855d PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 457TJ UT WOS:000170152700014 ER PT J AU Miller, JA Klippenstein, SJ AF Miller, JA Klippenstein, SJ TI The recombination of propargyl radicals: Solving the master equation SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID UNIMOLECULAR REACTIONS; THEORETICAL-ANALYSIS; AROMATICS FORMATION; PREMIXED ACETYLENE; TRANSITION-STATES; ENERGY-TRANSFER; MULTIPLE-WELL; LOW-PRESSURE; FLAMES; ISOMERIZATION AB We have investigated theoretically the recombination reaction between two propargyl (C3H3) radicals using previously published BAC-MP4 calculations (supplemented by DFT-B3LYP results) to characterize the potential energy surface, RRKM theory to compute microcanonical rate coefficients, and solutions to the time-dependent, multiple-well master equation to predict thermal rate coefficients and product distributions as a function of temperature and pressure. The thermal rate coefficient k(Tp) drops off precipitously at high temperature, regardless of the pressure. Below 500 K, k(Tp) approximate to k(infinity)(T), the high-pressure limit rate coefficient for initial complex formation, independent of p. For 500 K < T < 2000 K, the rate coefficient increases with increasing pressure, as one would normally expect. At 2000 K, the "coalescence temperature" for this reaction, k(T,p) = k(0)(T), the zero-pressure rate coefficient, and only bimolecular products (phenyl + H) are predicted, no matter how high we make the pressure. The latter effect is a consequence of all the intermediate complexes reaching, their "stabilization limits," a concept discussed extensively in the text. Below 800 K, many C6H6 isomers are formed as products, and the pressure and temperature dependence of the branching fractions is easily understood from conventional reasoning. Above 800 K, the product distributions begin to be dominated by isomers reaching their stabilization limits and disappearing as important products. Above 1200 K, the only significant products are fulvene, benzene, and phenyl + H. Beyond 1700 K fulvene disappears, and for T > 2000 K the only products are phenyl + H. We discuss our results in terms of the eigenvalues and eigenvectors of G, the transition matrix of the master equation. A "good" rate coefficient exists only when the rate is controlled by a single eigenvalue of G. A jump of the k(T,p) curve for any pressure from ones eigenvalue to another is triggered by the reaching of critical stabilization limits, producing "avoided crossings" of the eigenvalue. curves. It is at such avoided crossings that biexponential reactant decays occur. C1 Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA. RP Miller, JA (reprint author), Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA. OI Klippenstein, Stephen/0000-0001-6297-9187 NR 71 TC 91 Z9 91 U1 3 U2 31 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD AUG 2 PY 2001 VL 105 IS 30 BP 7254 EP 7266 DI 10.1021/jp0102973 PG 13 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 457TJ UT WOS:000170152700017 ER PT J AU Lee, Y Reisner, BA Hanson, JC Jones, GA Parise, JB Corbin, DR Toby, BH Freitag, A Larese, JZ AF Lee, Y Reisner, BA Hanson, JC Jones, GA Parise, JB Corbin, DR Toby, BH Freitag, A Larese, JZ TI New insight into cation relocations within the pores of zeolite Rho: In situ synchrotron X-ray and neutron powder diffraction studies of Pb- and Cd-exchanged Rho SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID STRUCTURAL-CHARACTERIZATION; RIETVELD REFINEMENT; PHASE-TRANSITION; FLEXIBILITY; FRAMEWORK; DEHYDRATION; NMR AB Upon heating, certain cations exchanged into zeolite RHO undergo large shifts in their positions within the pores. In several of these materials, negative thermal expansion is observed in conjunction with these cation relocations. Rather than being the purely temperature-driven effects presumed in previous reports, a combination of in situ time-resolved synchrotron X-ray and neutron powder diffraction studies indicates that the cation relocations and framework distortions observed in Pb- and Cd-exchanged zeolite rho are mediated by the presence of water in specific sites in the pores of RHO. Rietveld refinements using these data reveal that the initial unit cell contraction (50 degreesC less than or equal to T less than or equal to 100 degreesC) is due to the loss of unbound water in the -cages of rho. Water molecules in the double eight-ring (D8R) building units persist after this step, bound to the extraframework cations. The framework then contracts as water molecules are gradually removed (200 degreesC :less than or equal to T less than or equal to 400 degreesC). During this period, the extraframework cations migrate from the single eight-ring (S8R) site to the double eight-ring (D8R) sites in a concerted manner with the dehydration at the D8R. Upon complete removal of bound waters (400 degreesC less than or equal to T less than or equal to 500 degreesC), lead and cadmium cations experience different rearrangements. Cd(2+) ions relocate from the D8R and S8R sites to the single six-ring (S6R) site, while all Pb(2+) ions migrate from the S8R site to the D8R site. Neither transition is reversible upon cooling to room temperature in vacuo although both are reversible in the presence of water vapor. The role of water in these samples appears to determine the coordination environment of the extraframework cations uniquely since other sorbates. such as Kr, methanol, and CO. do not cause significant changes in either extraframework cation or framework atomic positions. C1 SUNY Stony Brook, Dept Geosci, Stony Brook, NY 11794 USA. SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. DuPont Co Inc, Expt Stn, Chem Res & Dev, Wilmington, DE 19880 USA. RP Lee, Y (reprint author), SUNY Stony Brook, Dept Geosci, Stony Brook, NY 11794 USA. RI Hanson, jonathan/E-3517-2010; Toby, Brian/F-3176-2013; Lee, Yongjae/K-6566-2016; OI Toby, Brian/0000-0001-8793-8285; Reisner, Barbara/0000-0003-3160-0351 NR 24 TC 37 Z9 37 U1 1 U2 15 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1520-6106 J9 J PHYS CHEM B JI J. Phys. Chem. B PD AUG 2 PY 2001 VL 105 IS 30 BP 7188 EP 7199 DI 10.1021/jp0100349 PG 12 WC Chemistry, Physical SC Chemistry GA 457TL UT WOS:000170152900005 ER PT J AU Lanzara, A Bogdanov, PV Zhou, XJ Kellar, SA Feng, DL Lu, ED Yoshida, T Eisaki, H Fujimori, A Kishio, K Shimoyama, JI Noda, T Uchida, S Hussain, Z Shen, ZX AF Lanzara, A Bogdanov, PV Zhou, XJ Kellar, SA Feng, DL Lu, ED Yoshida, T Eisaki, H Fujimori, A Kishio, K Shimoyama, JI Noda, T Uchida, S Hussain, Z Shen, ZX TI Evidence for ubiquitous strong electron-phonon coupling in high-temperature superconductors SO NATURE LA English DT Article ID T-C SUPERCONDUCTORS; NORMAL-STATE; BI2SR2CACU2O8+DELTA; PHOTOEMISSION; LA1.85SR0.15CUO4; DISPERSION; PSEUDOGAP; SPECTRA; ENERGY AB Coupling between electrons and phonons (lattice vibrations) drives the formation of the electron pairs responsible for conventional superconductivity(1). The lack of direct evidence for electron-phonon coupling in the electron dynamics of the high-transition-temperature superconductors has driven an intensive search for an alternative mechanism. A coupling of an electron with a phonon would result in an abrupt change of its velocity and scattering rate near the phonon energy. Here we use angle-resolved photoemission spectroscopy to probe electron dynamics-velocity and scattering rate-for three different families of copper oxide superconductors. We see in all of these materials an abrupt change of electron velocity at 50-80 meV, which we cannot explain by any known process other than to invoke coupling with the phonons associated with the movement of the oxygen atoms. This suggests that electron-phonon coupling strongly influences the electron dynamics in the high-temperature superconductors, and must therefore be included in any microscopic theory of superconductivity. C1 Stanford Univ, Dept Phys, Stanford, CA 94305 USA. Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1138656, Japan. Univ Tokyo, Dept Appl Chem, Bunkyo Ku, Tokyo 1138656, Japan. Univ Tokyo, Dept Superconduct, Bunkyo Ku, Tokyo 133, Japan. RP Shen, ZX (reprint author), Stanford Univ, Dept Phys, Stanford, CA 94305 USA. NR 29 TC 939 Z9 944 U1 18 U2 133 PU MACMILLAN PUBLISHERS LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD AUG 2 PY 2001 VL 412 IS 6846 BP 510 EP 514 DI 10.1038/35087518 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 458PC UT WOS:000170202900037 PM 11484045 ER PT J AU Abazov, VM Abbott, B Abdesselam, A Abolins, M Abramov, V Acharya, BS Adams, DL Adams, M Ahmed, SN Alexeev, GD Alves, GA Amos, N Anderson, EW Baarmand, MM Babintsev, VV Babukhadia, L Bacon, TC Baden, A Baldin, B Balm, PW Banerjee, S Barberis, E Baringer, P Barreto, J Bartlett, JF Bassler, U Bauer, D Bean, A Begel, M Belyaev, A Beri, SB Bernardi, G Bertram, I Besson, A Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Bhattacharjee, M Blazey, G Blessing, S Boehnlein, A Bojko, NI Borcherding, F Bos, K Brandt, A Breedon, R Briskin, G Brock, R Brooijmans, G Bross, A Buchholz, D Buehler, M Buescher, V Burtovoi, VS Butler, JM Canelli, F Carvalho, W Casey, D Casilum, Z Castilla-Valdez, H Chakraborty, D Chan, KM Chekulaev, SV Cho, DK Choi, S Chopra, S Christenson, JH Chung, M Claes, D Clark, AR Cochran, J Coney, L Connolly, B Cooper, WE Coppage, D Cummings, MAC Cutts, D Davis, GA Davis, K De, K de Jong, SJ Del Signore, K Demarteau, M Demina, R Demine, P Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Di Loreto, G Doulas, S Draper, P Ducros, Y Dudko, LV Duensing, S Duflot, L Dugad, SR Dyshkant, A Edmunds, D Ellison, J Elvira, VD Engelmann, R Eno, S Eppley, G Ermolov, P Eroshin, OV Estrada, J Evans, H Evdokimov, VN Fahland, T Feher, S Fein, D Ferbel, T Filthaut, F Fisk, HE Fisyak, Y Flattum, E Fleuret, F Fortner, M Frame, KC Fuess, S Gallas, E Galyaev, AN Gao, M Gavrilov, V Genik, RJ Genser, K Gerber, CE Gershtein, Y Gilmartin, R Ginther, G Gomez, B Gomez, G Goncharov, PI Solis, JLG Gordon, H Goss, LT Gounder, K Goussiou, A Graf, N Graham, G Grannis, PD Green, JA Greenlee, H Grinstein, S Groer, L Grunendahl, S Gupta, A Gurzhiev, SN Gutierrez, G Gutierrez, P Hadley, NJ Haggerty, H Hagopian, S Hagopian, V Hall, RE Hanlet, P Hansen, S Hauptman, JM Hays, C Hebert, C Hedin, D Heinson, AP Heintz, U Heuring, T Hildreth, MD Hirosky, R Hobbs, JD Hoeneisen, B Huang, Y Illingworth, R Ito, AS Jaffre, M Jain, S Jesik, R Johns, K Johnson, M Jonckheere, A Jones, M Jostlein, H Juste, A Kahn, S Kajfasz, E Kalinin, AM Karmanov, D Karmgard, D Kehoe, R Kharchilava, A Kim, SK Klima, B Knuteson, B Ko, W Kohli, JM Kostritskiy, AV Kotcher, J Kotwal, AV Kozelov, AV Kozlovsky, EA Krane, J Krishnaswamy, MR Krivkova, P Krzywdzinski, S Kubantsev, M Kuleshov, S Kulik, Y Kunori, S Kupco, A Kuznetsov, VE Landsberg, G Leflat, A Leggett, C Lehner, F Li, J Li, QZ Lima, JGR Lincoln, D Linn, SL Linnemann, J Lipton, R Lucotte, A Lueking, L Lundstedt, C Luo, C Maciel, AKA Madaras, RJ Malyshev, VL Manankov, V Mao, HS Marshall, T Martin, MI Martin, RD Mauritz, KM May, B Mayorov, AA McCarthy, R McDonald, J McMahon, T Melanson, HL Merkin, M Merritt, KW Miao, C Miettinen, H Mihalcea, D Mishra, CS Mokhov, N Mondal, NK Montgomery, HE Moore, RW Mostafa, M da Motta, H Nagy, E Nang, F Narain, M Narasimham, VS Neal, HA Negret, JP Negroni, S Nunnemann, T O'Neil, D Oguri, V Olivier, B Oshima, N Padley, P Pan, LJ Papageorgiou, K Para, A Parashar, N Partridge, R Parua, N Paterno, M Patwa, A Pawlik, B Perkins, J Peters, M Peters, O Petroff, P Piegaia, R Piekarz, H Pope, BG Popkov, E Prosper, HB Protopopescu, S Qian, J Raja, R Rajagopalan, S Ramberg, E Rapidis, PA Reay, NW Reucroft, S Rha, J Ridel, M Rijssenbeek, M Rockwell, T Roco, M Rubinov, P Ruchti, R Rutherfoord, J Sabirov, BM Santoro, A Sawyer, L Schamberger, RD Schellman, H Schwartzman, A Sen, N Shabalina, E Shivpuri, RK Shpakov, D Shupe, M Sidwell, RA Simak, V Singh, H Singh, JB Sirotenko, V Slattery, P Smith, E Smith, RP Snihur, R Snow, GR Snow, J Snyder, S Solomon, J Sorin, V Sosebee, M Sotnikova, N Soustruznik, K Souza, M Stanton, NR Steinbruck, G Stephens, RW Stichelbaut, F Stoker, D Stolin, V Stoyanova, DA Strauss, M Strovink, M Stutte, L Sznajder, A Taylor, W Tentindo-Repond, S Tripathi, SM Trippe, TG Turcot, AS Tuts, PM van Gemmeren, P Vaniev, V Van Kooten, R Varelas, N Vertogradov, LS Volkov, AA Vorobiev, AP Wahl, HD Wang, H Wang, ZM Warchol, J Watts, G Wayne, M Weerts, H White, A White, JT Whiteson, D Wightman, JA Wijngaarden, DA Willis, S Wimpenny, SJ Womersley, J Wood, DR Yamada, R Yamin, P Yasuda, T Yatsunenko, YA Yip, K Youssef, S Yu, J Yu, Z Zanabria, M Zheng, H Zhou, Z Zielinski, M Zieminska, D Zieminski, A Zutshi, V Zverev, EG Zylberstejn, A AF Abazov, VM Abbott, B Abdesselam, A Abolins, M Abramov, V Acharya, BS Adams, DL Adams, M Ahmed, SN Alexeev, GD Alves, GA Amos, N Anderson, EW Baarmand, MM Babintsev, VV Babukhadia, L Bacon, TC Baden, A Baldin, B Balm, PW Banerjee, S Barberis, E Baringer, P Barreto, J Bartlett, JF Bassler, U Bauer, D Bean, A Begel, M Belyaev, A Beri, SB Bernardi, G Bertram, I Besson, A Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Bhattacharjee, M Blazey, G Blessing, S Boehnlein, A Bojko, NI Borcherding, F Bos, K Brandt, A Breedon, R Briskin, G Brock, R Brooijmans, G Bross, A Buchholz, D Buehler, M Buescher, V Burtovoi, VS Butler, JM Canelli, F Carvalho, W Casey, D Casilum, Z Castilla-Valdez, H Chakraborty, D Chan, KM Chekulaev, SV Cho, DK Choi, S Chopra, S Christenson, JH Chung, M Claes, D Clark, AR Cochran, J Coney, L Connolly, B Cooper, WE Coppage, D Cummings, MAC Cutts, D Davis, GA Davis, K De, K de Jong, SJ Del Signore, K Demarteau, M Demina, R Demine, P Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Di Loreto, G Doulas, S Draper, P Ducros, Y Dudko, LV Duensing, S Duflot, L Dugad, SR Dyshkant, A Edmunds, D Ellison, J Elvira, VD Engelmann, R Eno, S Eppley, G Ermolov, P Eroshin, OV Estrada, J Evans, H Evdokimov, VN Fahland, T Feher, S Fein, D Ferbel, T Filthaut, F Fisk, HE Fisyak, Y Flattum, E Fleuret, F Fortner, M Frame, KC Fuess, S Gallas, E Galyaev, AN Gao, M Gavrilov, V Genik, RJ Genser, K Gerber, CE Gershtein, Y Gilmartin, R Ginther, G Gomez, B Gomez, G Goncharov, PI Solis, JLG Gordon, H Goss, LT Gounder, K Goussiou, A Graf, N Graham, G Grannis, PD Green, JA Greenlee, H Grinstein, S Groer, L Grunendahl, S Gupta, A Gurzhiev, SN Gutierrez, G Gutierrez, P Hadley, NJ Haggerty, H Hagopian, S Hagopian, V Hall, RE Hanlet, P Hansen, S Hauptman, JM Hays, C Hebert, C Hedin, D Heinson, AP Heintz, U Heuring, T Hildreth, MD Hirosky, R Hobbs, JD Hoeneisen, B Huang, Y Illingworth, R Ito, AS Jaffre, M Jain, S Jesik, R Johns, K Johnson, M Jonckheere, A Jones, M Jostlein, H Juste, A Kahn, S Kajfasz, E Kalinin, AM Karmanov, D Karmgard, D Kehoe, R Kharchilava, A Kim, SK Klima, B Knuteson, B Ko, W Kohli, JM Kostritskiy, AV Kotcher, J Kotwal, AV Kozelov, AV Kozlovsky, EA Krane, J Krishnaswamy, MR Krivkova, P Krzywdzinski, S Kubantsev, M Kuleshov, S Kulik, Y Kunori, S Kupco, A Kuznetsov, VE Landsberg, G Leflat, A Leggett, C Lehner, F Li, J Li, QZ Lima, JGR Lincoln, D Linn, SL Linnemann, J Lipton, R Lucotte, A Lueking, L Lundstedt, C Luo, C Maciel, AKA Madaras, RJ Malyshev, VL Manankov, V Mao, HS Marshall, T Martin, MI Martin, RD Mauritz, KM May, B Mayorov, AA McCarthy, R McDonald, J McMahon, T Melanson, HL Merkin, M Merritt, KW Miao, C Miettinen, H Mihalcea, D Mishra, CS Mokhov, N Mondal, NK Montgomery, HE Moore, RW Mostafa, M da Motta, H Nagy, E Nang, F Narain, M Narasimham, VS Neal, HA Negret, JP Negroni, S Nunnemann, T O'Neil, D Oguri, V Olivier, B Oshima, N Padley, P Pan, LJ Papageorgiou, K Para, A Parashar, N Partridge, R Parua, N Paterno, M Patwa, A Pawlik, B Perkins, J Peters, M Peters, O Petroff, P Piegaia, R Piekarz, H Pope, BG Popkov, E Prosper, HB Protopopescu, S Qian, J Raja, R Rajagopalan, S Ramberg, E Rapidis, PA Reay, NW Reucroft, S Rha, J Ridel, M Rijssenbeek, M Rockwell, T Roco, M Rubinov, P Ruchti, R Rutherfoord, J Sabirov, BM Santoro, A Sawyer, L Schamberger, RD Schellman, H Schwartzman, A Sen, N Shabalina, E Shivpuri, RK Shpakov, D Shupe, M Sidwell, RA Simak, V Singh, H Singh, JB Sirotenko, V Slattery, P Smith, E Smith, RP Snihur, R Snow, GR Snow, J Snyder, S Solomon, J Sorin, V Sosebee, M Sotnikova, N Soustruznik, K Souza, M Stanton, NR Steinbruck, G Stephens, RW Stichelbaut, F Stoker, D Stolin, V Stoyanova, DA Strauss, M Strovink, M Stutte, L Sznajder, A Taylor, W Tentindo-Repond, S Tripathi, SM Trippe, TG Turcot, AS Tuts, PM van Gemmeren, P Vaniev, V Van Kooten, R Varelas, N Vertogradov, LS Volkov, AA Vorobiev, AP Wahl, HD Wang, H Wang, ZM Warchol, J Watts, G Wayne, M Weerts, H White, A White, JT Whiteson, D Wightman, JA Wijngaarden, DA Willis, S Wimpenny, SJ Womersley, J Wood, DR Yamada, R Yamin, P Yasuda, T Yatsunenko, YA Yip, K Youssef, S Yu, J Yu, Z Zanabria, M Zheng, H Zhou, Z Zielinski, M Zieminska, D Zieminski, A Zutshi, V Zverev, EG Zylberstejn, A CA DO Collaborat TI Differential cross section for w boson production as a function of transverse momentum in p(p)over-bar collisions at root s=1.8 TeV SO PHYSICS LETTERS B LA English DT Article ID COLLABORATION; DISTRIBUTIONS; MASS AB We report a measurement of the differential cross section for W boson production as a function of its transverse momentum in proton-antiproton collisions at roots = 1.8 TeV The data were collected by the DO experiment at the Fermilab Tevatron Collider during 1994-1995 and correspond to an integrated luminosity of 85 pb(-1). The results are in good agreement with quantum chromodynamics over the entire range of transverse momentum. (C) 2001 Elsevier Science B.V All rights reserved. C1 Joint Nucl Res Inst, Dubna 141980, Russia. Univ Buenos Aires, Buenos Aires, DF, Argentina. Ctr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, Brazil. Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Los Andes, Bogota, Colombia. Charles Univ, Ctr Particle Phys, Prague, Czech Republic. Acad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech Republic. Univ San Francisco, Quito, Ecuador. Univ Grenoble 1, CNRS, IN2P3, Inst Nucl Sci, Grenoble, France. Univ Mediterranee, CNRS, IN2P3, CPPM, Marseille, France. CNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, France. Univ Paris 06, LPNHE, CNRS, IN2P3, Paris, France. Univ Paris 07, LPNHE, CNRS, IN2P3, Paris, France. CEA, DAPNIA, Serv Phys Particules, Saclay, France. Univ Mainz, Inst Phys, D-6500 Mainz, Germany. Panjab Univ, Chandigarh 160014, India. Univ Delhi, Delhi 110007, India. Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India. Seoul Natl Univ, Seoul, South Korea. CINVESTAV, Mexico City 14000, DF, Mexico. FOM Inst NIKHEF, Amsterdam, Netherlands. Univ Amsterdam, NIKHEF, Amsterdam, Netherlands. Univ Nijmegen, NIKHEF, Nijmegen, Netherlands. Inst Nucl Phys, Krakow, Poland. Inst Theoret & Expt Phys, Moscow 117259, Russia. Moscow MV Lomonosov State Univ, Moscow, Russia. Inst High Energy Phys, Protvino, Russia. Univ Lancaster, Lancaster, England. Univ London Imperial Coll Sci & Technol, London, England. Univ Arizona, Tucson, AZ 85721 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. Univ Calif Davis, Davis, CA 95616 USA. Calif State Univ Fresno, Fresno, CA 93740 USA. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Florida State Univ, Tallahassee, FL 32306 USA. Univ Hawaii, Honolulu, HI 96822 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, 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 Nebraska, Lincoln, NE 68588 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. Texas A&M Univ, College Stn, TX 77843 USA. Rice Univ, Houston, TX 77005 USA. Univ Virginia, Charlottesville, VA 22901 USA. Univ Washington, Seattle, WA 98195 USA. RP Abazov, VM (reprint author), Joint Nucl Res Inst, Dubna 141980, Russia. RI Sznajder, Andre/L-1621-2016; Canelli, Florencia/O-9693-2016; Shivpuri, R K/A-5848-2010; Gutierrez, Phillip/C-1161-2011; Dudko, Lev/D-7127-2012; Leflat, Alexander/D-7284-2012; Merkin, Mikhail/D-6809-2012; Yip, Kin/D-6860-2013; Kuleshov, Sergey/D-9940-2013; De, Kaushik/N-1953-2013; Oguri, Vitor/B-5403-2013; Alves, Gilvan/C-4007-2013; Belyaev, Alexander/F-6637-2015; Kim, Sun Kee/G-2042-2015; Chekulaev, Sergey/O-1145-2015 OI Sznajder, Andre/0000-0001-6998-1108; Canelli, Florencia/0000-0001-6361-2117; Dudko, Lev/0000-0002-4462-3192; Yip, Kin/0000-0002-8576-4311; Kuleshov, Sergey/0000-0002-3065-326X; De, Kaushik/0000-0002-5647-4489; Belyaev, Alexander/0000-0002-1733-4408; Kim, Sun Kee/0000-0002-0013-0775; NR 22 TC 27 Z9 27 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 2 PY 2001 VL 513 IS 3-4 BP 292 EP 300 DI 10.1016/S0370-2693(01)00628-1 PG 9 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 458YT UT WOS:000170223600007 ER PT J AU Airapetian, A Akopov, N Akopov, Z Amarian, M Arrington, J Aschenauer, EC Avakian, H Avakian, R Avetissian, A Avetissian, E Bailey, P Bains, B Baumgarten, C Beckmann, M Belostotski, S Bernreuther, S Bianchi, N Bottcher, H Borissov, A Bouwhuis, M Brack, J Brauksiepe, S Braun, B Bruckner, W Brull, A Budz, P Bulten, HJ Capitani, GP Carter, P Chumney, P Cisbani, E Court, GR Dalpiaz, PF De Leo, R De Nardo, L De Sanctis, E De Schepper, D Devitsin, E Huberts, PKAD Di Nezza, P Djordjadze, V Duren, M Dvoredsky, A Elbakian, G Ely, J Fantoni, A Fechtchenko, A Felawka, L Ferro-Luzzi, M Fiedler, K Filippone, BW Fischer, H Fox, B Franz, J Frullani, S Garber, Y Garibaldi, F Garutti, E Gavrilov, G Gharibyan, V Golendukhin, A Graw, G Grebeniouk, O Green, PW Greeniaus, LG Gute, A Haeberli, W Hartig, M Hasch, D Heesbeen, D Heinsius, FH Henoch, M Hertenberger, R Hesselink, W Hofman, G Holler, Y Holt, RJ Hommez, B Iarygin, G Iodice, M Izotov, A Jackson, HE Jgoun, A Jung, P Kaiser, R Kanesaka, J Kinney, E Kisselev, A Kitching, P Kobayashi, H Koch, N Konigsmann, K Kolster, H Korotkov, V Kotik, E Kozlov, V Krivokhijine, VG Kyle, G Lagamba, L Laziev, A Lenisa, P Lindemann, T Lorenzon, W Makins, NCR Martin, JW Marukyan, H Masoli, F McAndrew, M McIlhany, K McKeown, RD Meissner, F Menden, F Metz, A Meyners, N Mikloukho, O Miller, CA Milner, R Muccifora, V Mussa, R Nagaitsev, A Nappi, E Naryshkin, Y Nass, A Negodaeva, K Nowak, WD Oganessyan, K O'Neill, TG Openshaw, R Ouyang, J Owen, BR Pate, SF Potashov, S Potterveld, DH Rakness, G Rappoport, V Redwine, R Reggiani, D Reolon, AR Ristinen, R Rith, K Robinson, D Rostomyan, A Ruh, M Ryckbosch, D Sakemi, Y Sato, F Savin, I Scarlett, C Schafer, A Schill, C Schmidt, F Schnell, G Schuler, KP Schwind, A Seibert, J Seitz, B Shibata, TA Shin, T Shutov, V Simani, C Simon, A Sinram, K Steffens, E Steijger, JJM Stewart, J Stosslein, U Suetsugu, K Sutter, M Szymanowski, L Taroian, S Terkulov, A Teryaev, O Tessarin, S Thomas, E Tipton, B Tytgat, M Urciuoli, GM van den Brand, JFJ van der Steenhoven, G van de Vyver, R van Hunen, JJ Vetterli, MC Vikhrov, V Vincter, MG Visser, J Volk, KE Weiskopf, C Wendland, J Wilbert, J Wise, T Yen, S Yoneyama, S Zohrabian, H AF Airapetian, A Akopov, N Akopov, Z Amarian, M Arrington, J Aschenauer, EC Avakian, H Avakian, R Avetissian, A Avetissian, E Bailey, P Bains, B Baumgarten, C Beckmann, M Belostotski, S Bernreuther, S Bianchi, N Bottcher, H Borissov, A Bouwhuis, M Brack, J Brauksiepe, S Braun, B Bruckner, W Brull, A Budz, P Bulten, HJ Capitani, GP Carter, P Chumney, P Cisbani, E Court, GR Dalpiaz, PF De Leo, R De Nardo, L De Sanctis, E De Schepper, D Devitsin, E Huberts, PKAD Di Nezza, P Djordjadze, V Duren, M Dvoredsky, A Elbakian, G Ely, J Fantoni, A Fechtchenko, A Felawka, L Ferro-Luzzi, M Fiedler, K Filippone, BW Fischer, H Fox, B Franz, J Frullani, S Garber, Y Garibaldi, F Garutti, E Gavrilov, G Gharibyan, V Golendukhin, A Graw, G Grebeniouk, O Green, PW Greeniaus, LG Gute, A Haeberli, W Hartig, M Hasch, D Heesbeen, D Heinsius, FH Henoch, M Hertenberger, R Hesselink, W Hofman, G Holler, Y Holt, RJ Hommez, B Iarygin, G Iodice, M Izotov, A Jackson, HE Jgoun, A Jung, P Kaiser, R Kanesaka, J Kinney, E Kisselev, A Kitching, P Kobayashi, H Koch, N Konigsmann, K Kolster, H Korotkov, V Kotik, E Kozlov, V Krivokhijine, VG Kyle, G Lagamba, L Laziev, A Lenisa, P Lindemann, T Lorenzon, W Makins, NCR Martin, JW Marukyan, H Masoli, F McAndrew, M McIlhany, K McKeown, RD Meissner, F Menden, F Metz, A Meyners, N Mikloukho, O Miller, CA Milner, R Muccifora, V Mussa, R Nagaitsev, A Nappi, E Naryshkin, Y Nass, A Negodaeva, K Nowak, WD Oganessyan, K O'Neill, TG Openshaw, R Ouyang, J Owen, BR Pate, SF Potashov, S Potterveld, DH Rakness, G Rappoport, V Redwine, R Reggiani, D Reolon, AR Ristinen, R Rith, K Robinson, D Rostomyan, A Ruh, M Ryckbosch, D Sakemi, Y Sato, F Savin, I Scarlett, C Schafer, A Schill, C Schmidt, F Schnell, G Schuler, KP Schwind, A Seibert, J Seitz, B Shibata, TA Shin, T Shutov, V Simani, C Simon, A Sinram, K Steffens, E Steijger, JJM Stewart, J Stosslein, U Suetsugu, K Sutter, M Szymanowski, L Taroian, S Terkulov, A Teryaev, O Tessarin, S Thomas, E Tipton, B Tytgat, M Urciuoli, GM van den Brand, JFJ van der Steenhoven, G van de Vyver, R van Hunen, JJ Vetterli, MC Vikhrov, V Vincter, MG Visser, J Volk, KE Weiskopf, C Wendland, J Wilbert, J Wise, T Yen, S Yoneyama, S Zohrabian, H CA HERMES Collaborat TI Double-spin asymmetry in the cross section for exclusive rho(0) production in lepton-proton scattering SO PHYSICS LETTERS B LA English DT Article DE lepton-nucleon scattering; rho production; asymmetries; photoabsorbtion ID VIRTUAL COMPTON-SCATTERING; VECTOR-MESONS; ELECTROPRODUCTION; LEPTOPRODUCTION; PHOTONS; NUCLEON; HERA; PHOTOPRODUCTION; POLARIZATION; HYDROGEN AB Evidence for a positive longitudinal double-spin asymmetry = 0.24 +/- 0.11(stat) +/- 0.02(syst) in the cross section for exclusive diffractive rho (0)(770) vector-meson production in polarised lepton-proton scattering was observed by the HERMES experiment. The longitudinally polarised 27.56 GeV HERA positron beam was scattered off a longitudinally polarised pure hydrogen gas target. The average invariant mass of the photon-proton system has a value of = 4.9 GeV, while the average negative squared four-momentum of the virtual photon is = 1.7 GeV2. The ratio of the present result to the corresponding spin asymmetry in inclusive deep-inelastic scattering is in agreement with an early theoretical prediction based on the generalised vector-meson dominance model. (C) 2001 Published by Elsevier Science B.V. C1 Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Ist Nazl Fis Nucl, Sez Bari, I-70124 Bari, Italy. CALTECH, WK Kellogg Radiat Lab, Pasadena, CA 91125 USA. Univ Colorado, Nucl Phys Lab, Boulder, CO 80309 USA. DESY, D-22603 Hamburg, Germany. DESY Zeuthen, D-15738 Zeuthen, Germany. Joint Inst Nucl Res, Dubna 141980, Russia. Univ Erlangen Nurnberg, Inst Phys, D-91057 Erlangen, Germany. Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany. State Univ Ghent, Dept Subatom & Radiat Phys, B-9000 Ghent, Belgium. Max Planck Inst Kernphys, D-69029 Heidelberg, Germany. Univ Illinois, Dept Phys, Urbana, IL 61801 USA. Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England. Univ Wisconsin, Dept Phys, Madison, WI 53706 USA. MIT, Nucl Sci Lab, Cambridge, MA 02139 USA. Univ Michigan, Randall Lab Phys, Ann Arbor, MI 48109 USA. PN Lebedev Phys Inst, Moscow 117924, Russia. Univ Munich, Sekt Phys, D-85748 Garching, Germany. New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA. NIKHEF, NL-1009 DB Amsterdam, Netherlands. Petersburg Nucl Phys Inst, Gatchina 188350, Russia. Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany. Ist Nazl Fis Nucl, Sez Roma 1, Grp Sanita, I-00161 Rome, Italy. Ist Super Sanita, Phys Lab, I-00161 Rome, Italy. Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada. TRIUMF, Vancouver, BC V6T 2A3, Canada. Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan. Free Univ Amsterdam, Dept Phys & Astron, NL-1081 HV Amsterdam, Netherlands. Yerevan Phys Inst, Yerevan 375036, Armenia. RP Airapetian, A (reprint author), Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada. RI Arrington, John/D-1116-2012; Gavrilov, Gennady/C-6260-2013; Holt, Roy/E-5803-2011; Messier, Claude/A-2322-2008; Kozlov, Valentin/M-8000-2015; Terkulov, Adel/M-8581-2015; Cisbani, Evaristo/C-9249-2011 OI Arrington, John/0000-0002-0702-1328; Messier, Claude/0000-0002-4791-1763; Cisbani, Evaristo/0000-0002-6774-8473 NR 42 TC 22 Z9 22 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 2 PY 2001 VL 513 IS 3-4 BP 301 EP 310 DI 10.1016/S0370-2693(01)00639-6 PG 10 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 458YT UT WOS:000170223600008 ER PT J AU Chasman, RR Egido, JL Robledo, LM AF Chasman, RR Egido, JL Robledo, LM TI Persistence of deformed shapes in the neutron-deficient Pb region SO PHYSICS LETTERS B LA English DT Article ID INTRUDER STATES; EXCITED-STATES; ALPHA-DECAY; SHELL; COEXISTENCE; ISOTOPES; PB-186; NUCLEI; BANDS AB Calculations are presented for low-lying 0(+) excited states in the neutron deficient Pb isotopes Pb182-190 using both the HFB method with a Gogny interaction and a many-body method with phenomenological interaction strengths. The calculations suggest the presence of an as yet unobserved oblate 0(+) state in Pb-184. (C) 2001 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Univ Autonoma Madrid, Dept Fis Teor C XI, E-28049 Madrid, Spain. RP Chasman, RR (reprint author), Argonne Natl Lab, Div Phys, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Robledo, Luis Miguel/L-2557-2013; Egido, J. Luis/F-4921-2017 OI Robledo, Luis Miguel/0000-0002-6061-1319; Egido, J. Luis/0000-0002-8292-6127 NR 22 TC 28 Z9 29 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 2 PY 2001 VL 513 IS 3-4 BP 325 EP 329 DI 10.1016/S0370-2693(01)00382-3 PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 458YT UT WOS:000170223600011 ER PT J AU Abbatt, J Sokolov, O Clegg, S AF Abbatt, J Sokolov, O Clegg, S TI Uptake of SO2, H2O2 and oxygenated organics by ice surfaces under conditions of the free troposphere. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, Canada. Sandia Natl Labs, Albuquerque, NM USA. NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 190-PHYS BP U207 EP U207 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690101121 ER PT J AU Adzic, R Wang, J AF Adzic, R Wang, J TI Oxygen reduction kinetics: Structural effects of metal and anion adlayers. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 58-COLL BP U321 EP U321 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690001646 ER PT J AU Ainsworth, CC Serne, JR McKinley, JP Schaef, HT Zachara, JM AF Ainsworth, CC Serne, JR McKinley, JP Schaef, HT Zachara, JM TI Hanford sediments under the SX-108 high level waste tank: Current geochemical status. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 47-GEOC BP U492 EP U492 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002525 ER PT J AU Alferink, SM Farnham, J Fowler, MM Schulte, LD Wong, AS AF Alferink, SM Farnham, J Fowler, MM Schulte, LD Wong, AS TI Solution In-Line alpha-Counter and its applications. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Univ Missouri, Dept Nucl Engn, Rolla, MO 65409 USA. Los Alamos Natl Lab, LANSCE 9, Los Alamos, NM USA. Los Alamos Natl Lab, Los Alamos, NM USA. Los Alamos Natl Lab, Div Nucl Mat Technol, Los Alamos, NM USA. Los Alamos Natl Lab, NMT 9, Los Alamos, NM USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 7-NUCL BP U6 EP U6 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100004 ER PT J AU Allen, PG Sylwester, ER Zhao, PH Kersting, AB Zavarin, M AF Allen, PG Sylwester, ER Zhao, PH Kersting, AB Zavarin, M TI Surface interactions and reactivity of actinide ions with mineral colloids. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Lawrence Livermore Natl Lab, Seaborg Inst, Livermore, CA 94551 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 42-GEOC BP U491 EP U491 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002520 ER PT J AU Anderson, RR Martello, DV Strazisar, BM White, CM AF Anderson, RR Martello, DV Strazisar, BM White, CM TI Qualitative and semi-quantitative analysis of semi-volatile organics from ambient air fine-particulate matter, PM2.5. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 83-FUEL BP U472 EP U472 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002414 ER PT J AU Antonio, MR Francesconi, LA AF Antonio, MR Francesconi, LA TI Polyoxometalates for actinide element coordination and immobilization. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. CUNY Hunter Coll, Dept Chem, New York, NY 10021 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 158-NUCL BP U30 EP U30 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100147 ER PT J AU Arena, DA Tobin, JG Shuh, DK Schulze, RK Boyd, P AF Arena, DA Tobin, JG Shuh, DK Schulze, RK Boyd, P TI ASES: An end station for synchrotron-based photoelectron spectroscopy of actinide and other highly reactive samples. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Lawrence Berkeley Natl Lab, Berkeley, CA USA. EM daarena@lbl.gov RI Tobin, James/O-6953-2015 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 92-NUCL BP U19 EP U19 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100084 ER PT J AU Assink, RA Celina, M Harris, DJ AF Assink, RA Celina, M Harris, DJ TI Degradation analysis and lifetime prediction of a polyurethane propellant binder. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Sandia Natl Labs, Dept Organ Mat, Albuquerque, NM 87185 USA. Queensland Univ Technol, Brisbane, Qld, Australia. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 153-NUCL BP U29 EP U29 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100142 ER PT J AU Barnett, MO Turner, RR Singer, PC AF Barnett, MO Turner, RR Singer, PC TI Formation and stability of mercuric sulfide. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Auburn Univ, Dept Civil Engn, Auburn, AL USA. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Univ N Carolina, Chapel Hill, NC 27515 USA. NR 0 TC 0 Z9 0 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 43-ENVR BP U425 EP U425 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002164 ER PT J AU Barnett, MO Roden, EE Jardine, PM Brooks, SC AF Barnett, MO Roden, EE Jardine, PM Brooks, SC TI Biogeochemical interactions of uranium and Fe(III) oxides in subsurface environments. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Auburn Univ, Dept Civil Engn, Auburn, AL 36830 USA. Univ Alabama, Dept Biol Sci, Tuscaloosa, AL 35487 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. RI Brooks, Scott/B-9439-2012 OI Brooks, Scott/0000-0002-8437-9788 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 118-NUCL BP U23 EP U23 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100107 ER PT J AU Bartels, DM Coe, JV AF Bartels, DM Coe, JV TI Absolute single ion hydration enthalpies, entropies, and heat capacities: Using cluster data and ab initio calculations to remove the extra-thermodynamic assumption. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. Ohio State Univ, Dept Chem, Columbus, OH 43210 USA. NR 0 TC 0 Z9 0 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 277-PHYS BP U219 EP U219 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690101208 ER PT J AU Bartels, DM Cline, JA Jonah, CD Takahashi, K AF Bartels, DM Cline, JA Jonah, CD Takahashi, K TI Hydrated electron spectrum: From clusters to supercritical fluid. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. NR 0 TC 1 Z9 1 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 263-PHYS BP U217 EP U217 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690101194 ER PT J AU Becker, JA Bernstein, LA Younes, W McNabb, DP Garrett, PE Archer, D McGrath, CA Stoyer, MA Chen, H Ormand, WE Nelson, RO Chadwick, MB Johns, GD Drake, D Young, PG Devlin, M Fotiades, N Wilbum, WS AF Becker, JA Bernstein, LA Younes, W McNabb, DP Garrett, PE Archer, D McGrath, CA Stoyer, MA Chen, H Ormand, WE Nelson, RO Chadwick, MB Johns, GD Drake, D Young, PG Devlin, M Fotiades, N Wilbum, WS TI Partial gamma-ray cross sections for the reaction Pu-239(n,2n gamma i) and the Pu-239 cross sections. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RI McGrath, Christopher/E-8995-2013; Devlin, Matthew/B-5089-2013 OI Devlin, Matthew/0000-0002-6948-2154 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 129-NUCL BP U25 EP U25 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100118 ER PT J AU Benedict, L Grossman, JG Puzder, A Williamson, A Galli, G AF Benedict, L Grossman, JG Puzder, A Williamson, A Galli, G TI Simulation of the electronic and optical properties of semiconductor nanostructures. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 91-NUCL BP U19 EP U19 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100083 ER PT J AU Bernstein, LA Stoyer, MA Garrett, PE Younes, W Becker, JA AF Bernstein, LA Stoyer, MA Garrett, PE Younes, W Becker, JA TI Radioactive ion beam experiments for stockpile stewardship. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Lawrence Livermore Natl Lab, N Div, Livermore, CA 94551 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 38-NUCL BP U10 EP U11 PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100030 ER PT J AU Berry, DA Surdoval, WA Williams, MC AF Berry, DA Surdoval, WA Williams, MC TI Solid state energy conversion alliance: Program to produce mass manufactured ceramic fuel cells. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE, Natl Energy Technol Lab, Strateg Ctr Nat Gas, Morgantown, WV 26507 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 66-FUEL BP U469 EP U469 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002397 ER PT J AU Bertulani, C AF Bertulani, C TI Strong electromagnetic fields in relativistic heavy ion collisions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Nucl Theory Grp, Dept Phys, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 174-NUCL BP U32 EP U32 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100163 ER PT J AU Bhatia, SR Crichton, M Mourchid, A Prud'homme, RK Lal, J AF Bhatia, SR Crichton, M Mourchid, A Prud'homme, RK Lal, J TI Tuning interactions between novel polyelectrolyte micelles. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Univ Massachusetts, Dept Chem Engn, Amherst, MA 01003 USA. CNRS Rhodia, Complex Fluids Lab, Cranbury, NJ USA. Princeton Univ, Dept Chem Engn, Princeton, NJ 08544 USA. Argonne Natl Lab, Div Intense Pulsed Neutron Source, Argonne, IL 60439 USA. RI Bhatia, Surita/B-4536-2008 NR 0 TC 0 Z9 0 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 130-POLY BP U260 EP U260 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690101460 ER PT J AU Birnbaum, ER McCleskey, TM Rack, JJ Yates, MZ Campbell, ML AF Birnbaum, ER McCleskey, TM Rack, JJ Yates, MZ Campbell, ML TI Water-in-carbon dioxide microemulsions for metal extractions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Los Alamos Natl Lab, CACS, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, CSIC, Los Alamos, NM 87545 USA. RI McCleskey, Thomas/J-4772-2012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 162-NUCL BP U31 EP U31 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100151 ER PT J AU Bitterwolf, T Kline, DL Linehan, J Addleman, RS Yonker, C Franz, J AF Bitterwolf, T Kline, DL Linehan, J Addleman, RS Yonker, C Franz, J TI Rh(CO)(PMe3)(2)Cl photochemistry in supercritical CO2 and ethane. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Univ Idaho, Dept Chem, Moscow, ID 83843 USA. Pacific NW Natl Lab, Richland, WA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 36-INOR BP U551 EP U551 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002764 ER PT J AU Bloom, PD Baikerikar, KG Anderson, BC Mallapragada, SK Sheares, VV AF Bloom, PD Baikerikar, KG Anderson, BC Mallapragada, SK Sheares, VV TI Ultra high molecular weight polyethylene quasicrystal composites for hip arthroplasty femoral components. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Iowa State Univ, Dept Chem, Ames, IA 50011 USA. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Chem Engn, Ames, IA 50011 USA. RI Mallapragada, Surya/F-9375-2012 NR 0 TC 1 Z9 1 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 352-PMSE BP U394 EP U394 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690102223 ER PT J AU Bolstad, DB Chandler-Ferguson, D DeFina, SC Gerdes, JM Walker, MA Weller, ML Wilson, PA Ono, MY Taylor, SE AF Bolstad, DB Chandler-Ferguson, D DeFina, SC Gerdes, JM Walker, MA Weller, ML Wilson, PA Ono, MY Taylor, SE TI Sertonin transporter inhibitor ligands: Synthesis and biochemical studies of 2 '-methoxymethyl-6-nitroquipazine. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Cent Washington Univ, Dept Chem, Ellensburg, WA 98926 USA. Lawrence Berkeley Natl Lab, Ctr Funct Imaging, Berkeley, CA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 53-MEDI BP U648 EP U648 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690003381 ER PT J AU Borup, RL Inbody, MA Morton, BL Brown, LF AF Borup, RL Inbody, MA Morton, BL Brown, LF TI Fuel processing for fuel cells: Effects on catalyst durability and carbon formation. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Los Alamos Natl Lab, ESA, EPE, Los Alamos, NM 87545 USA. NR 0 TC 2 Z9 2 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 130-FUEL BP U479 EP U479 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002461 ER PT J AU Bozell, JJ AF Bozell, JJ TI NREL and renewable resources. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 7-SCHB BP U406 EP U406 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690102281 ER PT J AU Braddock-Wilking, J Corey, JY Katz, E Wang, QZ AF Braddock-Wilking, J Corey, JY Katz, E Wang, QZ TI Activation of Si-H bonds by platinum-phosphine complexes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 21-INOR BP U548 EP U549 PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002749 ER PT J AU Brockman, F Rockhold, M Yarwood, R Niemet, M Spadoni, T Bradley, S Selker, J AF Brockman, F Rockhold, M Yarwood, R Niemet, M Spadoni, T Bradley, S Selker, J TI Microbial dynamics in unsaturated porous media under static and flow conditions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Environm Microbiol Grp, Richland, WA 99352 USA. Oregon State Univ, Dept Bioresource Engn, Corvallis, OR 97331 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 121-NUCL BP U24 EP U24 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100110 ER PT J AU Brown, GM Bonnesen, PV Gu, BH Moyer, BA Porter, WD Alexandratos, SD Klingshirn, MA AF Brown, GM Bonnesen, PV Gu, BH Moyer, BA Porter, WD Alexandratos, SD Klingshirn, MA TI Novel bifunctional anion exchange resins for the highly selective sorption of perchlorate and pertechnetate. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Oak Ridge Natl Lab, Div Chem & Analyt Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN USA. Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. RI Solominow, Sonia/A-4021-2008; Moyer, Bruce/L-2744-2016 OI Moyer, Bruce/0000-0001-7484-6277 NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 77-IEC BP U518 EP U518 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002672 ER PT J AU Buchholz, BA Cheng, AS Dibble, RW AF Buchholz, BA Cheng, AS Dibble, RW TI Isotopic tracing of fuel components in emissions from a diesel engine. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA. RI Buchholz, Bruce/G-1356-2011 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 40-NUCL BP U11 EP U11 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100032 ER PT J AU Buchinger, F Crawford, J Gulick, S Lee, J Hamilton, A Moir, R Cassidy, A Gliga, S Liang, CF Savard, G Rastikerdar, S AF Buchinger, F Crawford, J Gulick, S Lee, J Hamilton, A Moir, R Cassidy, A Gliga, S Liang, CF Savard, G Rastikerdar, S TI Gas cell-ion guide system for laser spectroscopy at McGill. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 McGill Univ, Montreal, PQ H3A 2T8, Canada. CSNSM, Orsay, France. ANL, Argonne, IL USA. Isfahan Univ, Esfahan, Iran. RI Gliga, Sebastian/K-4019-2015 OI Gliga, Sebastian/0000-0003-1729-1070 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 48-NUCL BP U12 EP U12 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100040 ER PT J AU Budil, KS Ault, ER Shepp, TA Colvin, JD King, WE Zimmerman, H Hackel, L Kumar, M Clauson, T Thoe, R AF Budil, KS Ault, ER Shepp, TA Colvin, JD King, WE Zimmerman, H Hackel, L Kumar, M Clauson, T Thoe, R TI Laser shock experiments investigating spall in metals. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Lawrence Livermore Natl Lab, B Div, Livermore, CA 94550 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 36-NUCL BP U10 EP U10 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100028 ER PT J AU Burger, C Liu, LZ Hsiao, BS Chu, B Hanson, J Hori, T Glimcher, MJ AF Burger, C Liu, LZ Hsiao, BS Chu, B Hanson, J Hori, T Glimcher, MJ TI Synchrotron SAXS/WAXS study of the composite nature of bone. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. Harvard Univ, Sch Med, Childrens Hosp, Cambridge, MA 02138 USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 101-PMSE BP U355 EP U355 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690101972 ER PT J AU Burnham, CJ Xantheas, SS AF Burnham, CJ Xantheas, SS TI From water clusters to ice polymorphs. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. RI Xantheas, Sotiris/L-1239-2015 NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 51-PHYS BP U187 EP U187 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100983 ER PT J AU Burns, CJ Duval, PB Golden, JT Scott, BL AF Burns, CJ Duval, PB Golden, JT Scott, BL TI Reactivity of uranium organoimido complexes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 237-INOR BP U582 EP U582 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002965 ER PT J AU Cai, H Chen, TN Wang, XP Schultz, AJ Koetzle, TF Xue, ZL AF Cai, H Chen, TN Wang, XP Schultz, AJ Koetzle, TF Xue, ZL TI eta(2)-imine formation from the reactions of pentakis(dimethylamide)tantalum with silanes: Neutron and X-ray diffraction structure of a dihydride imine complex. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 20-INOR BP U548 EP U548 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002748 ER PT J AU Caliebe, WA Kao, CC Ocko, BM AF Caliebe, WA Kao, CC Ocko, BM TI Scattering methods applied to polymer research at the NSLS. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 106-PMSE BP U356 EP U356 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690101977 ER PT J AU Calo, JM Hall, PJ Houtmann, S Winans, RE Seifert, S AF Calo, JM Hall, PJ Houtmann, S Winans, RE Seifert, S TI In situ determination of porosity during gasification via SAXS/TGA. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Brown Univ, Div Engn, Providence, RI 02912 USA. Univ Strathclyde, Dept Chem Engn, Glasgow G1 1XQ, Lanark, Scotland. Univ Strathclyde, Dept Pure & Appl Chem, Glasgow, Lanark, Scotland. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RI Hall, Peter/F-6948-2010 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 117-FUEL BP U477 EP U477 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002448 ER PT J AU Camaioni, DM Dupuis, M Willey, WR AF Camaioni, DM Dupuis, M Willey, WR TI Characterization of intermediates in high level waste. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Environm & Mol Sci Lab, Richland, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 76-NUCL BP U17 EP U17 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100068 ER PT J AU Camaioni, DM Meisel, D Orlando, T AF Camaioni, DM Meisel, D Orlando, T TI Radiation chemistry and stored defense nuclear waste. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Pacific NW Natl Lab, William R Willey Environm & Mol Sci Lab, Richland, WA 99352 USA. Univ Notre Dame, Radiat Lab, Notre Dame, IN 46556 USA. Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA. Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 405-CHED BP U253 EP U253 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690001292 ER PT J AU Cantrell, KJ Yabusaki, S Olsen, K Amonette, JE Thornton, EC AF Cantrell, KJ Yabusaki, S Olsen, K Amonette, JE Thornton, EC TI H2S oxidation by iron oxide: Experimental determination of rates and mechanisms for modeling gas phase treatment of the vadose zone. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Richland, WA 99353 USA. Pacific NW Natl Lab, Field Hydrol & Chem Grp, Richland, WA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 64-GEOC BP U494 EP U494 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002542 ER PT J AU Carmichael, I Hug, GL Meisel, D Camaioni, DM AF Carmichael, I Hug, GL Meisel, D Camaioni, DM TI NOx ions and radicals in homogeneous and heterogeneous nuclear waste. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Univ Notre Dame, Radiat Lab, Notre Dame, IN 46556 USA. Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA. Pacific NW Natl Lab, William R Willey Environm & Mol Sci Lab, Richland, WA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 144-NUCL BP U28 EP U28 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100133 ER PT J AU Carroll, S Steefel, C Roberts, S Zhao, PH AF Carroll, S Steefel, C Roberts, S Zhao, PH TI Cesium transport in Hanford sediments: Application of an experimentally based cation exchange model. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RI Steefel, Carl/B-7758-2010 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 66-GEOC BP U495 EP U495 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002544 ER PT J AU Catalano, JG Warner, JA Chen, CC Yamakawa, I Newville, M Sutton, SR Ainsworth, CC Zachara, JM Traina, SJ Brown, GE AF Catalano, JG Warner, JA Chen, CC Yamakawa, I Newville, M Sutton, SR Ainsworth, CC Zachara, JM Traina, SJ Brown, GE TI X-ray spectroscopic and fluorescence study of the speciation and distribution of chromium in Hanford S-SX Tank Farm core samples. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Stanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305 USA. Ohio State Univ, Sch Nat Resources, Columbus, OH 43210 USA. Univ Chicago, Consortium Adv Radiat Sources, GSECARS, Chicago, IL 60637 USA. Pacific NW Natl Lab, Interfacial Geochem Grp, Richland, WA USA. RI Catalano, Jeffrey/A-8322-2013 OI Catalano, Jeffrey/0000-0001-9311-977X NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 52-GEOC BP U492 EP U493 PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002530 ER PT J AU Chandler, E Moriarty, J de la Rubia, TD Couch, R AF Chandler, E Moriarty, J de la Rubia, TD Couch, R TI LLNL's dynamics of metals program: Multi-scale modeling of plasticity and dynamic failure. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 54-NUCL BP U13 EP U13 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100046 ER PT J AU Chang, TM Dang, LX AF Chang, TM Dang, LX TI Solvation of ammonium ion in water with polarizable potentials: A molecular dynamics study. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Univ Wisconsin Parkside, Dept Chem, Kenosha, WI 53141 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 268-PHYS BP U218 EP U218 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690101199 ER PT J AU Chen, KD Ressini, C Argyle, M Bell, AT Iglesia, E AF Chen, KD Ressini, C Argyle, M Bell, AT Iglesia, E TI UV-visible spectroscopy studies of dispersed oxide catalysts for oxidative dehydrogenation of alkanes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RI Argyle, Morris/A-8702-2009; Argyle, Morris/D-4952-2013 OI Argyle, Morris/0000-0001-9430-9145 NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 17-COLL BP U314 EP U314 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690001605 ER PT J AU Chen, LX Liu, T Jennings, G Scaltrio, DV Meyer, GJ AF Chen, LX Liu, T Jennings, G Scaltrio, DV Meyer, GJ TI Catching molecular devices in action by determination of transient molecular structure using laser pump/x-ray probe XAFS. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Johns Hopkins Univ, Dept Chem, Baltimore, MD 21218 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 156-PHYS BP U201 EP U202 PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690101087 ER PT J AU Chen, PP Rahimian, K Loy, D AF Chen, PP Rahimian, K Loy, D TI Butylene-bridged disilaoxacyclopentanes, liquid precursors for non-shrinking polycarbosiloxanes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Sandia Natl Labs, Dept Organ Mat, Albuquerque, NM 87185 USA. Sandia Natl Labs, Dept Catalysts & Mat, Albuquerque, NM 87185 USA. RI Loy, Douglas/D-4847-2009 OI Loy, Douglas/0000-0001-7635-9958 NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 132-POLY BP U261 EP U261 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690101462 ER PT J AU Cheng, LW Fenter, P Sturchio, NC Nagy, KL Schlegel, M AF Cheng, LW Fenter, P Sturchio, NC Nagy, KL Schlegel, M TI X-ray reflectivity study of the muscovite(001)-water interface. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Argonne Natl Lab, Argonne, IL 60439 USA. Univ Illinois, Chicago, IL 60680 USA. Univ Colorado, Boulder, CO 80309 USA. RI Cheng, Likwan/C-1436-2013 NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 41-ENVR BP U425 EP U425 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002162 ER PT J AU Chidsey, CED Sikes, HD Dudek, SP Feldberg, SW Smalley, JF Newton, MD Van Ryswyk, H AF Chidsey, CED Sikes, HD Dudek, SP Feldberg, SW Smalley, JF Newton, MD Van Ryswyk, H TI Rates of interfacial electron transfer through pi-conjugated bridges. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Stanford Univ, Dept Chem, Stanford, CA 94305 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. Harvey Mudd Coll, Dept Chem, Claremont, CA 91711 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 28-COLL BP U316 EP U316 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690001616 ER PT J AU Chin, CJ Yiacoumi, S Tsouris, C AF Chin, CJ Yiacoumi, S Tsouris, C TI Influence of metal ion sorption on colloidal surface forces measured by atomic force microscopy. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA. Oak Ridge Natl Lab, Div Chem Technol, Oak Ridge, TN 37831 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 9-ENVR BP U420 EP U420 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002130 ER PT J AU Chin, YH Dagle, RA Hu, JL Wang, Y Baker, EG AF Chin, YH Dagle, RA Hu, JL Wang, Y Baker, EG TI Methanol-steam reforming using microchannel chemical reactors. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Chem Proc Dev Grp, Richland, WA 99352 USA. RI Wang, Yong/C-2344-2013 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 112-FUEL BP U476 EP U477 PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002443 ER PT J AU Cho, JD Garrett, JT Xu, RJ Yeh, FJ Hsiao, BS Lin, JS Runt, J AF Cho, JD Garrett, JT Xu, RJ Yeh, FJ Hsiao, BS Lin, JS Runt, J TI Crystallization and structure formation of strongly-interacting polymer mixtures: Poly(ethylene oxide) and styrene-hydroxystyrene random copolymers. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 257-PMSE BP U380 EP U380 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690102128 ER PT J AU Clark, SB Maddison, A Yates, L Rao, L Jiang, J Wood, S AF Clark, SB Maddison, A Yates, L Rao, L Jiang, J Wood, S TI Influence of temperature on actinide complexation equilibria: Providing a scientific basis for modeling actinide speciation in high-level radioactive waste. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Washington State Univ, Dept Chem, Pullman, WA 99164 USA. Lawrence Berkeley Natl Lab, Berkeley, CA USA. Univ Idaho, Moscow, ID 83843 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 138-NUCL BP U27 EP U27 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100127 ER PT J AU Cline, JA Jonah, CD Takahashi, K Bartels, DM AF Cline, JA Jonah, CD Takahashi, K Bartels, DM TI Radiation chemistry in supercritical water. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. NR 0 TC 0 Z9 0 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 352-CHED BP U245 EP U245 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690001239 ER PT J AU Cornelius, CJ Loy, DA AF Cornelius, CJ Loy, DA TI Engineering permeability and selectivy properties from polysilsesquioxanes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RI Loy, Douglas/D-4847-2009 OI Loy, Douglas/0000-0001-7635-9958 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 63-COLL BP U322 EP U322 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690001651 ER PT J AU Cowin, JP Laskin, A Iedema, MJ AF Cowin, JP Laskin, A Iedema, MJ TI Ammonium sulfates in Houston: Automated time-tagged archiving of field collected aerosols for laboratory single particle analysis. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 365-PHYS BP U232 EP U232 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690101296 ER PT J AU Crowell, RA AF Crowell, RA TI Ultrafast pulse radiolysis. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 319-CHED BP U241 EP U241 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690001206 ER PT J AU Dadmun, MD Arlen, MA Hamilton, WA Smith, G AF Dadmun, MD Arlen, MA Hamilton, WA Smith, G TI Using neutron reflectivity to determine the diffusive properties of copolymers in a homopolymer matrix. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN USA. Los Alamos Natl Lab, Neutron Scattering Ctr, Los Alamos, NM USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 52-PMSE BP U348 EP U348 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690101923 ER PT J AU Dai, S Liang, CD AF Dai, S Liang, CD TI Ionic liquids: A new class of sensing materials for detection of organic vapor based on quartz crystal microbalance. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Oak Ridge Natl Lab, Div Chem Technol, Oak Ridge, TN 37831 USA. RI Liang, Chengdu/G-5685-2013; Dai, Sheng/K-8411-2015 OI Dai, Sheng/0000-0002-8046-3931 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 85-ANYL BP U92 EP U92 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690000387 ER PT J AU Datskos, P Sepaniak, M Headrick, J Lavrik, NV Tipple, CA AF Datskos, P Sepaniak, M Headrick, J Lavrik, NV Tipple, CA TI Micro-mechanical sensors. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Oak Ridge Natl Lab, Div Engn Technol, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. RI Lavrik, Nickolay/B-5268-2011 OI Lavrik, Nickolay/0000-0002-9543-5634 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 189-NUCL BP U35 EP U35 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100178 ER PT J AU Datz, S Vane, CR Thomas, R Rosen, S Larsson, M van der Zande, W AF Datz, S Vane, CR Thomas, R Rosen, S Larsson, M van der Zande, W TI Dynamics of three-body dissociative recombination of dihydrides. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Stockholm, Dept Phys, Stockholm, Sweden. FOM Inst AMOLF, Nieuwegein, Netherlands. RI van der Zande, Wim/D-2506-2009 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 90-PHYS BP U192 EP U192 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690101022 ER PT J AU Davis, ES Gerdes, JM Walker, MA Weller, ML Wilson, PA DeVietti, TL Renk, KJ Ono, MY Taylor, SE AF Davis, ES Gerdes, JM Walker, MA Weller, ML Wilson, PA DeVietti, TL Renk, KJ Ono, MY Taylor, SE TI Studies of the serotonin transporter: Synthetic, pharmacological, and whole animal investigations of inhibitor 2 '-methyl-6-nitroquipazine. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Cent Washington Univ, Dept Chem, Ellensburg, WA 98926 USA. Cent Washington Univ, Dept Psychol, Ellensburg, WA 98926 USA. Lawrence Berkeley Natl Lab, Ctr Funct Imaging, Berkeley, CA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 55-MEDI BP U648 EP U648 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690003383 ER PT J AU Davis, S Torn, M Phillips, A Fournel, F Hall, K AF Davis, S Torn, M Phillips, A Fournel, F Hall, K TI Improving the accuracy of stable isotope analysis of atmospheric and soil trace gases using automated multiple sampling combined with a standard trace gas pre-concentration system. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Micromass UK Ltd, Manchester M23 9LZ, Lancs, England. Lawrence Berkeley Natl Lab, Berkeley, CA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 16-GEOC BP U486 EP U486 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002494 ER PT J AU Dempsey, JF AF Dempsey, JF TI Design to analysis and the science behind stockpile stewardship. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 56-NUCL BP U13 EP U13 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100048 ER PT J AU Deng, BL Kim, CS Lan, YQ Thornton, EC AF Deng, BL Kim, CS Lan, YQ Thornton, EC TI Chromium (VI) reduction by hydrogen sulfide in aquatic systems. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 New Mexico Inst Min & Technol, Dept Environm Engn, Socorro, NM 87801 USA. Nanjing Agr Coll, Coll Sci, Nanjing, Peoples R China. Pacific NW Natl Lab, Field Hydrol & Chem Grp, Richland, WA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 142-NUCL BP U27 EP U27 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100131 ER PT J AU DePaolo, DJ Maher, K Conrad, ME AF DePaolo, DJ Maher, K Conrad, ME TI Quantifying infiltration fluxes at the Hanford site using the Sr isotope ratios of groundwater. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. E O Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 62-GEOC BP U494 EP U494 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002540 ER PT J AU Dietz, ML Chiarizia, R Horwitz, EP AF Dietz, ML Chiarizia, R Horwitz, EP TI Recent advances in the development of extraction chromatographic materials for the isolation of radionuclides from biological and environmental samples. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. PG Res Fdn Inc, Darien, IL USA. Eichrom Technol Inc, Darien, IL USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 60-NUCL BP U14 EP U14 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100052 ER PT J AU Dimitrijevic, NM Takahashi, K Bartels, DM Jonah, CD AF Dimitrijevic, NM Takahashi, K Bartels, DM Jonah, CD TI Radiolytically induced synthesis of silver nanoparticles in supercritical ethane. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 118-CHED BP U214 EP U214 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690001006 ER PT J AU Ding, M Schroeder, NC Reimus, PW AF Ding, M Schroeder, NC Reimus, PW TI Zero-valent iron as a reducing "getter" for immobilization of technetium. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Los Alamos Natl Lab, E ET, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 149-ENVR BP U443 EP U443 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002270 ER PT J AU Ding, M Reimus, P Sullivan, EJ Ware, SD AF Ding, M Reimus, P Sullivan, EJ Ware, SD TI Transport of Neptunium-237 in saturated alluvium south of Yucca Mountain, Nevada. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Los Alamos Natl Lab, E ET, Los Alamos, NM 87545 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 148-ENVR BP U442 EP U442 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002269 ER PT J AU Dodge, CJ Francis, AJ Gillow, JB Halada, GP Eng, C AF Dodge, CJ Francis, AJ Gillow, JB Halada, GP Eng, C TI Association of uranium with iron oxides commonly found on corroding steel surfaces. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Dept Environm Sci, Upton, NY 11973 USA. SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA. NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 117-NUCL BP U23 EP U23 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100106 ER PT J AU Drenzek, NJ Reddy, CM Eglinton, TI Sturchio, NC Heraty, LJ Tarr, CH Shiner, VJ AF Drenzek, NJ Reddy, CM Eglinton, TI Sturchio, NC Heraty, LJ Tarr, CH Shiner, VJ TI Stable chlorine and carbon isotopic compositions of selected semi-volatile organic contaminants. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Woods Hole Oceanog Inst, Dept Marine Chem & Geochem, Woods Hole, MA 02543 USA. Univ Illinois, Chicago, IL USA. Argonne Natl Lab, Environm Res Grp, Argonne, IL 60439 USA. Indiana Univ, Dept Chem, Bloomington, IN 47405 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 15-GEOC BP U486 EP U486 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002493 ER PT J AU Dueker, SR Lin, Y Lemke, SL Follett, JR Clifford, AJ Buchholz, BA Vogel, JS AF Dueker, SR Lin, Y Lemke, SL Follett, JR Clifford, AJ Buchholz, BA Vogel, JS TI Long-term pharmacokinetics of nutrients at physiological doses using Accelerator Mass Spectrometry. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Univ Calif Davis, Dept Nutr, Davis, CA 95616 USA. LLNL, Ctr Accelerator Mass Spectrometry, Livermore, CA USA. RI Buchholz, Bruce/G-1356-2011 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 41-NUCL BP U11 EP U11 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100033 ER PT J AU Duff, MC Urbanik-Couglin, J Hunter, DB AF Duff, MC Urbanik-Couglin, J Hunter, DB TI Characterization of uranium in Fe-rich sediments and in Fe-oxide minerals. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Westinghouse Savannah River Co, Savannah River Technol Ctr, Aiken, SC 29808 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 43-GEOC BP U491 EP U491 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002521 ER PT J AU Dunning, TH van Mourik, T Peterson, KA AF Dunning, TH van Mourik, T Peterson, KA TI Advances in the calculation of electron affinities. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 N Carolina Supercomputing Ctr, Res Triangle Pk, NC 27709 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA USA. RI van Mourik, Tanja/A-4007-2008 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 396-PHYS BP U237 EP U237 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690101327 ER PT J AU Duran, BL Ehler, DS Sauer, NN AF Duran, BL Ehler, DS Sauer, NN TI Pilot scale testing of chemical treatment process for remediation of mixed waste. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 134-ENVR BP U440 EP U440 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002255 ER PT J AU Dzielawa, JA Dietz, ML AF Dzielawa, JA Dietz, ML TI 1-alkyl-3-methylimidazolium-based room-temperature ionic liquids as solvents in the extraction of alkaline earth cations from acidic nitrate media by crown ethers. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 27-IEC BP U511 EP U511 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002622 ER PT J AU Egorov, O DeVol, T Grate, J AF Egorov, O DeVol, T Grate, J TI Advances in automated radioanalytical chemistry: From groundwater monitoring to nuclear waste analysis. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. Clemson Univ, Clemson, SC 29631 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 183-NUCL BP U34 EP U34 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100172 ER PT J AU Ehler, DS McCleskey, TM Sauer, NN Jarvinen, GD AF Ehler, DS McCleskey, TM Sauer, NN Jarvinen, GD TI Separations of metal ions using modified alumina membranes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Div Chem, C SIC, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RI McCleskey, Thomas/J-4772-2012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 32-IEC BP U511 EP U511 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002627 ER PT J AU Erickson, KL Borek, TT Renlund, AM Ulibarri, TA Clayton, D Fletcher, TH AF Erickson, KL Borek, TT Renlund, AM Ulibarri, TA Clayton, D Fletcher, TH TI Thermal decomposition chemistry of a rigid polyurethane foam. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Sandia Natl Labs, Thermal Fluids Expt Sci Dept, Albuquerque, NM 87185 USA. Brigham Young Univ, Provo, UT 84602 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 154-NUCL BP U29 EP U29 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100143 ER PT J AU Espada, LI Mange, JT Orler, EB Wrobleski, DA Langlois, DA Hjelm, RP AF Espada, LI Mange, JT Orler, EB Wrobleski, DA Langlois, DA Hjelm, RP TI Partitioning of a plasticizer in the domain structure of a segmented poly(ester urethane) using small angle neutron scattering. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Los Alamos Neutron Sci Ctr, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Dynam Expt Div, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Polymer & Coatings Grp, Los Alamos, NM 87545 USA. RI Lujan Center, LANL/G-4896-2012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 472-POLY BP U326 EP U326 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690101802 ER PT J AU Estes, JC MacGowan, P Bryant, JL Wieda, KJ Reinkens, K AF Estes, JC MacGowan, P Bryant, JL Wieda, KJ Reinkens, K TI Partnership between the Pacific Northwest National Laboratory and the Washington Mathematics, Engineering & Science Achievement Program as a means of helping to fill the science pipeline with women and underrepresented minority students. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Sci Educ Programs, Richland, WA 99352 USA. Pacific NW Natl Lab, Environm Technol Div, Richland, WA USA. Washington State Univ Tri Cities, Yakima Valley Tri Cities MESA, Richland, WA USA. NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 7-WCC BP U438 EP U438 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690102414 ER PT J AU Evans, JC Dresel, PE Farmer, OT AF Evans, JC Dresel, PE Farmer, OT TI ICP/MS isotopic determination of nuclear wastes sources associated with Hanford tank leaks. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Environm Technol Div, Richland, WA 99352 USA. Pacific NW Natl Lab, Natl Secur Div, Richland, WA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 61-GEOC BP U494 EP U494 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002539 ER PT J AU Fenter, P McBride, MT Srajer, G Sturchio, NC Bosbach, D AF Fenter, P McBride, MT Srajer, G Sturchio, NC Bosbach, D TI Structure of HEDP adsorbed at the barite-water interface. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Argonne Natl Lab, Div Environm Res, Argonne, IL 60439 USA. Lawrence Livermore Natl Lab, Div Chem & Mat Sci, Livermore, CA USA. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Illinois, Chicago, IL USA. Forschungszentrum Karlsruhe, Inst Nukl Entsorgung, D-76021 Karlsruhe, Germany. RI Bosbach, Dirk/C-7764-2011 OI Bosbach, Dirk/0000-0002-6099-0400 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 24-GEOC BP U488 EP U488 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002502 ER PT J AU Fluss, M Wirth, B Wall, M Felter, T Caturla, M De La Rubia, TD AF Fluss, M Wirth, B Wall, M Felter, T Caturla, M De La Rubia, TD TI Kondo effect and other temperature dependent properties of radiation damage in Fcc Pu(Ga): Defect kinetics and electron scattering. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Lawrence Livermore Natl Lab, Dept Chem & Mat Sci, Livermore, CA 94550 USA. RI Caturla, Maria /D-6241-2012; Wirth, Brian/O-4878-2015 OI Caturla, Maria /0000-0002-4809-6553; Wirth, Brian/0000-0002-0395-0285 NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 113-NUCL BP U22 EP U23 PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100102 ER PT J AU Francis, AJ Dodge, CJ McDonald, JA Gillow, JB Halada, GP AF Francis, AJ Dodge, CJ McDonald, JA Gillow, JB Halada, GP TI Decontamination of uranium contaminated steel surfaces by hydroxycarboxylic acids with uranium recovery. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Dept Environm Sci, Upton, NY 11973 USA. Louisiana State Univ, Dept Environm Studies, Baton Rouge, LA 70803 USA. SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 161-NUCL BP U30 EP U31 PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100150 ER PT J AU Fried, LE Glaesemann, KR AF Fried, LE Glaesemann, KR TI First principles calculations of vibrations in van der Waals clusters. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Lawrence Livermore Natl Lab, Dept Chem & Mat Sci, Livermore, CA 94551 USA. Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94551 USA. RI Glaesemann, Kurt/B-4841-2010; Fried, Laurence/L-8714-2014 OI Fried, Laurence/0000-0002-9437-7700 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 208-PHYS BP U209 EP U209 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690101139 ER PT J AU Friese, J Clark, SB Zhang, Z Rao, L Rai, D AF Friese, J Clark, SB Zhang, Z Rao, L Rai, D TI Separation and speciation of Cr(III) oligomers under alkaline conditions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Washington State Univ, Dept Chem, Pullman, WA 99164 USA. Lawrence Berkeley Natl Lab, Berkeley, CA USA. Pacific NW Natl Lab, Environm & Hlth Sci Div, Richland, WA USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 141-NUCL BP U27 EP U27 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100130 ER PT J AU Fryxell, GE Lin, YH Mattigod, SV Wu, H Fiskum, S Zemanian, TS Kemner, K Birnbaum, JC Kelly, SD AF Fryxell, GE Lin, YH Mattigod, SV Wu, H Fiskum, S Zemanian, TS Kemner, K Birnbaum, JC Kelly, SD TI Separation and stabilization of radionuclides using self-assembled monolayers on mesoporous supports. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RI Lin, Yuehe/D-9762-2011; ID, MRCAT/G-7586-2011 OI Lin, Yuehe/0000-0003-3791-7587; NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 164-NUCL BP U31 EP U31 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467EU UT WOS:000170690100153 ER PT J AU Fu, XJ Rubio, LHG Olivares, JA Alupoaei, C Smith, A AF Fu, XJ Rubio, LHG Olivares, JA Alupoaei, C Smith, A TI Rapid detection and identification of microorganisms by multiwavelength spectroscopy. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Univ S Florida, Dept Chem Engn, Tampa, FL 33620 USA. Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 18-BIOL BP U118 EP U118 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690000532 ER PT J AU Fuller, CC Bargar, JR AF Fuller, CC Bargar, JR TI Characterization of uranium sorption by apatite in a permeable reactive barrier. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US Geol Survey, Div Water Resources, Menlo Pk, CA 94025 USA. Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA. NR 0 TC 1 Z9 1 U1 3 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG PY 2001 VL 222 MA 41-GEOC BP U491 EP U491 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 467ET UT WOS:000170690002519 ER EF