FN Thomson Reuters Web of Science™ VR 1.0 PT J AU CHAN, ST AF CHAN, ST TI NUMERICAL SIMULATIONS OF LNG VAPOR DISPERSION FROM A FENCED STORAGE AREA SO JOURNAL OF HAZARDOUS MATERIALS LA English DT Article AB The FEM3A model, with minor modifications, has been applied to simulate the vapor dispersion of four large-scale LNG vapor barrier field experiments and a comparison was made with relevant field data. The model was able to reproduce the major results of the experiments within a factor of two under most circumstances. For Falcon-1, with additional heat flux over the source area to model the superheating effects, results consistent with field observations were obtained. In particular, a vapor cloud overfilling the fenced enclosure was reproduced, in contrast with a vapor cloud essentially contained within the fence at all times observed in a pre-spill wind tunnel simulation. The simple approach currently taken to model turbulence and heat transfer in the source area has performed reasonably well; however, more sophisticated modeling of the source may be necessary for more accurate predictions at all locations. Results from simulations of the Falcon-4 experiment indicate that an LNG vapor fence can significantly reduce the downwind distance and hazardous area of the flammable vapor clouds. However, a vapor fence could also prolong the cloud persistence time in the source area, thus increasing the potential for ignition and combustion within the vapor fence and the area nearby. RP CHAN, ST (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,POB 808,L-262,LIVERMORE,CA 94551, USA. NR 14 TC 18 Z9 19 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-3894 J9 J HAZARD MATER JI J. Hazard. Mater. PD APR PY 1992 VL 30 IS 2 BP 195 EP 224 DI 10.1016/0304-3894(92)85078-F PG 30 WC Engineering, Environmental; Engineering, Civil; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA HR872 UT WOS:A1992HR87200004 ER PT J AU OLACK, G EDELSON, R OROSKAR, A PEAK, M GASPARRO, F AF OLACK, G EDELSON, R OROSKAR, A PEAK, M GASPARRO, F TI PHOTOCHEMICAL CHARACTERIZATION OF WATER-SOLUBLE PSORALEN DERIVATIVES SO JOURNAL OF INVESTIGATIVE DERMATOLOGY LA English DT Meeting Abstract C1 YALE UNIV,DEPT DERMATOL,NEW HAVEN,CT 06520. ARGONNE NATL LAB,DIV BIOL & MED RES,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BLACKWELL PUBLISHING INC PI MALDEN PA 350 MAIN ST, MALDEN, MA 02148 USA SN 0022-202X J9 J INVEST DERMATOL JI J. Invest. Dermatol. PD APR PY 1992 VL 98 IS 4 BP 654 EP 654 PG 1 WC Dermatology SC Dermatology GA HL846 UT WOS:A1992HL84600883 ER PT J AU BOYD, STP SWIFT, GW AF BOYD, STP SWIFT, GW TI SLOW GROWTH OF HE-3-B INTO HYPERCOOLED HE-3-A SO JOURNAL OF LOW TEMPERATURE PHYSICS LA English DT Article ID B PHASE-BOUNDARY; SUPERFLUID HE-3; INTERFACE; DYNAMICS AB We report observations of the first-order phase transition between the two superfluid phases of He-3. We supercool a long cylindrical sample of the higher-temperature A phase in a magnetic field in a simple dc magnetometer. We then introduce B phase at one end of the sample and observe its growth into the supercooled A phase via the magnetometer signal. For temperatures above a certain value, the phase interface travels up the tube with a nearly time-independent velocity, whose temperature dependence is in reasonable agreement with theory. We also investigate the dependence of this velocity on tube diameter and magnetic field. Our measured values of the difference between A phase and B phase magnetization agree with previous dynamic (NMR) measurements. We also derive thermodynamic data on the AB transition from the measurements of magnetization difference and the dependence of the transition temperature on magnetic field. C1 UNIV CALIF LOS ALAMOS SCI LAB,CONDENSED MATTER & THERMAL PHYS GRP,LOS ALAMOS,NM 87544. NR 18 TC 16 Z9 16 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0022-2291 J9 J LOW TEMP PHYS JI J. Low Temp. Phys. PD APR PY 1992 VL 87 IS 1-2 BP 35 EP 61 DI 10.1007/BF00141566 PG 27 WC Physics, Applied; Physics, Condensed Matter SC Physics GA HR472 UT WOS:A1992HR47200003 ER PT J AU WANG, ZY JAU, T NORRIS, JR AF WANG, ZY JAU, T NORRIS, JR TI THE TIME DEVELOPMENT OF THE MAGNETIC-MOMENT OF CORRELATED RADICAL PAIRS SO JOURNAL OF MAGNETIC RESONANCE LA English DT Article ID FOURIER-TRANSFORM; SPIN POLARIZATION; MODEL; PHOTOSYNTHESIS; RESONANCE C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. RP WANG, ZY (reprint author), UNIV CHICAGO,DEPT CHEM,CHICAGO,IL 60637, USA. NR 21 TC 22 Z9 22 U1 0 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0022-2364 J9 J MAGN RESON JI J. Magn. Reson. PD APR PY 1992 VL 97 IS 2 BP 322 EP 334 DI 10.1016/0022-2364(92)90317-Z PG 13 WC Biochemical Research Methods; Physics, Atomic, Molecular & Chemical; Spectroscopy SC Biochemistry & Molecular Biology; Physics; Spectroscopy GA HL675 UT WOS:A1992HL67500009 ER PT J AU DEVINE, MK KAMINSKI, DA SIPAHI, LB JILES, DC AF DEVINE, MK KAMINSKI, DA SIPAHI, LB JILES, DC TI DETECTION OF FATIGUE IN STRUCTURAL-STEELS BY MAGNETIC PROPERTY MEASUREMENTS SO JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE LA English DT Article AB The magnetic properties of ferromagnetic materials are sensitive to the mechanical and microstructural condition of the material. Fatigue can affect the magnetic properties due to microstructural changes, primarily dislocation production. Magnetic hysteresis measurements have been used to monitor the changes in the parameters due to low cycle fatigue, with the overall objective of developing a new tool to enhance the present NDE techniques for detecting failure. The magnetic measurements were performed using the Magnescope, a portable magnetic inspection system. Materials for fatiguing included plain low carbon steel and samples of quenched and tempered AISI 4340. The coercivity and remanence of the low carbon steel samples increased during the early stages of fatigue, reflecting strain hardening. As cycling progressed, the magnetic parameters leveled off and dropped sharply shortly before failure. The coercivity and remanence of the 4340 samples decreased during the initial stages of cycling, reflecting fatigue softening. The parameters plateaued, then decreased shortly before failure. The amount of change in the magnetic parameters was found to depend on the strain amplitude of the cycling. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP DEVINE, MK (reprint author), IOWA STATE UNIV SCI & TECHNOL,CTR NDE,AMES,IA 50011, USA. RI Jiles, David/H-9548-2012 NR 1 TC 12 Z9 12 U1 0 U2 4 PU ASM INTERNATIONAL PI MATERIALS PARK PA SUBSCRIPTIONS SPECIALIST CUSTOMER SERVICE, MATERIALS PARK, OH 44073-0002 SN 1059-9495 J9 J MATER ENG PERFORM JI J. Mater. Eng. Perform. PD APR PY 1992 VL 1 IS 2 BP 249 EP 254 DI 10.1007/BF02648624 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA JZ415 UT WOS:A1992JZ41500012 ER PT J AU WARD, TL KODAS, TT CARIM, AH KROEGER, DM HSU, H AF WARD, TL KODAS, TT CARIM, AH KROEGER, DM HSU, H TI POWDER CHARACTERISTICS AND SINTERING BEHAVIOR OF AG-DOPED YBA2CU3O(7-X) PRODUCED BY AEROSOL DECOMPOSITION SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID BA-CU-O; SUPERCONDUCTING PROPERTIES; COMPOSITE SUPERCONDUCTORS; OXYGEN-PRESSURE; GRAIN-GROWTH; SILVER; MICROSTRUCTURE; ENHANCEMENT; CERAMICS; LIQUIDUS AB YBa2Cu3O7-x(1-2-3) powders and 1-2-3 powders doped with 14 wt.% Ag (AgYBa2Cu3O7-x) were produced using aerosol decomposition of nitrate solutions. Powder produced at T > 900-degrees-C consisted of submicron particles and had T(c) almost-equal-to 92 K in magnetic susceptibility measurements. As-produced Ag-doped powder was a composite of nearly phase-pure 1-2-3 and crystalline Ag (by x-ray diffraction) for reactor temperatures between 900-degrees-C and 950-degrees-C, whereas powder produced at T greater-than-or-equal-to 970-degrees-C contained significant amounts of Y2BaCuO5 which were not found in 1-2-3 synthesis in the absence of Ag. This implied that the melting of Ag (approximately 960-degrees-C) or the Ag-O eutectic (approximately 940-degrees-C) promoted decomposition of 1-2-3 during powder synthesis. Dilatometry showed that 1-2-3 and Ag/1-2-3 powders densified rapidly between 800-degrees-C and 875-degrees-C, achieving nearly 90% of theoretical density after heating to 875-degrees-C at 5-degrees-C/min in air. Pellets of the Ag-doped powder were also sintered for 2-60 h at 895-degrees-C in air. Scanning electron and optical microscopy revealed that Ag grains remained fine and uniformly distributed, varying in size from approximately 1-mu-m after 2 h to 3-7-mu-m after 60 h, while 1-2-3 grains became plate-shaped with thicknesses of 1-5-mu-m and lengths of 10-30-mu-m after 60 h. Thus, the use of aerosol Ag/1-2-3 powders allows the use of lower processing temperatures and shorter times to produce dense ceramics with smaller Ag and 1-2-3 grain sizes than can be obtained using solid-state reaction routes. C1 UNIV NEW MEXICO, DEPT CHEM & NUCL ENGN, CTR MICROENGINEERED CERAM, ALBUQUERQUE, NM 87131 USA. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. NR 41 TC 19 Z9 19 U1 0 U2 1 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA SN 0884-2914 EI 2044-5326 J9 J MATER RES JI J. Mater. Res. PD APR PY 1992 VL 7 IS 4 BP 827 EP 836 DI 10.1557/JMR.1992.0827 PG 10 WC Materials Science, Multidisciplinary SC Materials Science GA HP370 UT WOS:A1992HP37000010 ER PT J AU RUBINS, RS TRYBULA, Z WAPLAK, S DRUMHELLER, JE SHI, DL XU, M AF RUBINS, RS TRYBULA, Z WAPLAK, S DRUMHELLER, JE SHI, DL XU, M TI MODULATED MICROWAVE-ABSORPTION IN SINGLE-CRYSTAL BI-SR-CA-CU-O SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID HIGH-TC SUPERCONDUCTORS; FLUX-QUANTIZATION; FIELD PENETRATION; OXIDES; SYSTEM; YBA2CU3O7-DELTA; TEMPERATURE; DEPENDENCE; SAMPLES; STATE AB Modulated microwave absorption measurements at 9.3 GHz were made on the low field absorption observed in the superconducting phase of Bi-Sr-Ca-Cu-O. The line intensity observed with a low modulation amplitude of 50 mOe showed a maximum between 70 K and 80 K and dropped to zero near 95 K. With a modulation amplitude of 10 Oe, an additional broad line absorption was observed above 88 K, peaking in intensity near 95 K, and disappearing above 100 K. Hysteresis, associated with flux trapping, occurred when the maximum field H(max) in a sweep cycle exceeded a critical value H*(T), which varied from about 7 Oe at 59 K to 1 Oe at 82 K. For H(max) > H*, the hysteresis splitting at first varied linearly with (H(max) - H*), later saturating at a value delta-H(max)(T). Above 70 K, the relationship delta-H(max) = b(T0 - T) was obeyed with T0 = 92.3 K and b perpendicular-to = -0.3 Oe/K for H perpendicular and b parallel-to = -0.23 Oe/K for H parallel to the c-axis. C1 MONTANA STATE UNIV,DEPT PHYS,BOZEMAN,MT 59717. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP RUBINS, RS (reprint author), UNIV TEXAS,DEPT PHYS,BOX 19059,ARLINGTON,TX 76017, USA. NR 43 TC 0 Z9 0 U1 1 U2 1 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD APR PY 1992 VL 7 IS 4 BP 837 EP 843 DI 10.1557/JMR.1992.0837 PG 7 WC Materials Science, Multidisciplinary SC Materials Science GA HP370 UT WOS:A1992HP37000011 ER PT J AU SHEN, Y RICHARDS, DR HINKS, DG MITCHELL, AW AF SHEN, Y RICHARDS, DR HINKS, DG MITCHELL, AW TI CHEMISTRY AND STRUCTURAL MODULATIONS IN BI2SR2CUO6 SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID CU-O SYSTEM; SUPERCONDUCTING PHASE; CRYSTAL SUBSTRUCTURE; SR; FILMS AB A series of samples along the composition lines Bi2+xSr2-xCuOy and Bi2Sr2-xCuOy have been used to study the structural modulation, chemistry, and superconducting properties of pseudo-tetragonal Bi2Sr2CuO6 (2201). The 2201 phase can be formed from crystallization of thin glassy platelets. The sample displayed a strong crystallographic (00l) orientation which made it possible to determine incommensurate modulations near (00l) reflections using a conventional x-ray theta-2-theta scan. From the crystallization of the 2201 phase, it was found that structural modulation was intrinsic to the phase, and ordering of the structure required a long time at high temperature. High temperature in situ x-ray diffraction of a 2201 Bi2Sr1.85CuOy platelet showed that the modulation existed at 875-degrees-C in O2 (T(melt) almost-equal-to 892-degrees-C in O2). These suggest that the structural modulation cannot be caused solely by oxygen ordering and that metal-ion displacement must be involved. By removing 0.04 to 0.05 oxygen atom per formula unit from Bi2Sr2CuOy and Bi2Sr1.85CuOy, the c* components of the modulation changed from 0.31 to 0.26 and from 0.38 to 0.31, respectively, while the b* component of the modulation remained approximately 0.2. This demonstrates that oxygen, while not the sole cause, does play a role in the formation of the structural modulation. However, the invariance of b(mod) with respect to the change in oxygen content does not support the model that explained the modulation by inserting extra oxygen in the BiO plane. By varying metal-ion concentrations of Bi and Sr we found that both the lattice parameters and the modulation vectors depended more on the Bi/Sr ratio than on the Sr concentration alone. As the Bi/Sr ratio increased from 1.0 to 1.35, the modulation lines moved toward the (00l) reflections. The corresponding superstructural periodicities were calculated to vary from approximately 1/5 b* + 0.32 c* to approximately 1/5 b* + 0.63 c*. Effects of oxygen content and metal-ion concentration on the 2201 phase formation and the superconducting properties will also be discussed. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCONDUCT,ARGONNE,IL 60439. NR 33 TC 3 Z9 3 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD APR PY 1992 VL 7 IS 4 BP 844 EP 852 DI 10.1557/JMR.1992.0844 PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA HP370 UT WOS:A1992HP37000012 ER PT J AU SCHNEIBEL, JH HAZZLEDINE, PM AF SCHNEIBEL, JH HAZZLEDINE, PM TI THE CRYSTALLOGRAPHY OF CLEAVAGE FRACTURE IN AL3SC SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID BEHAVIOR; COMPRESSION; MICROSTRUCTURE; CRYSTALS; DUCTILE; ALLOYS; AL3TI AB The intermetallic compound Al3Sc is a trialuminide with the L1(2) structure, which deforms easily in compression at room temperature, with yield stresses around 100 MPa. As shown by single crystal compression experiments, slip occurs on {111} planes. In tension Al3Sc fractures transgranularly in a brittle manner. The predominant cleavage plane is {011}. In a scanning electron microscope (SEM) numerous cleavage steps, which are aligned in three major crystallographic directions, are observed. The fracture surfaces almost always show microscopic waviness along the traces of intersecting slip planes. Regions that are flat within the experimental resolution of the SEM are only occasionally observed. Some of the cleavage steps consist of {111} or {001} planes, but others are not distinctly crystallographic. Plastic deformation involving dislocation motion or twinning may have occurred at these steps. Reactions among different types of steps are also observed. One type of cleavage pattern found is strikingly similar to the typical appearance of fracture surfaces of fcc or fcc related materials after stress corrosion cracking. However, this particular pattern is only rarely observed in Al3Sc and can therefore not be taken as evidence for stress corrosion cracking in this material. Our observations indicate that an interpretation of cleavage fracture in Al3Sc in terms of surface energies alone is unlikely to be successful. Similarly, any criterion that categorizes its fracture behavior into either fully brittle or fully ductile is faced with difficulties. A full understanding of the fracture morphology of Al3Sc will therefore require detailed atomistic simulations. RP SCHNEIBEL, JH (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. NR 19 TC 15 Z9 17 U1 0 U2 4 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD APR PY 1992 VL 7 IS 4 BP 868 EP 875 DI 10.1557/JMR.1992.0868 PG 8 WC Materials Science, Multidisciplinary SC Materials Science GA HP370 UT WOS:A1992HP37000015 ER PT J AU PHARR, GM OLIVER, WC COOK, RF KIRCHNER, PD KROLL, MC DINGER, TR CLARKE, DR AF PHARR, GM OLIVER, WC COOK, RF KIRCHNER, PD KROLL, MC DINGER, TR CLARKE, DR TI ELECTRICAL-RESISTANCE OF METALLIC CONTACTS ON SILICON AND GERMANIUM DURING INDENTATION SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID HIGH-PRESSURE; HARDNESS; GE; TRANSITIONS; BEHAVIOR; SI AB The effects of indentation on the electrical resistance of rectifying gold-chromium contacts on silicon and germanium have been studied using nanoindentation techniques. The DC resistance of circuits consisting of positively and negatively biased contacts with silicon and germanium in the intervening gap was measured while indenting either directly in the gap or on the contacts. Previous experiments showed that a large decrease in resistance occurs when an indentation bridges a gap, which was used to support the notion that a transformation from the semiconducting to the metallic state occurs beneath the indenter. The experimental results reported here, however, show that a large portion of the resistance drop is due to decreases in the resistance of the metal-to-semiconductor interface rather than the bulk semiconductor. Experimental evidence supporting this is presented, and a simple explanation for the physical processes involved is developed which still relies on the concept of an indentation-induced, semiconducting-to-metallic phase transformation. C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. IBM CORP,DIV RES,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598. UNIV CALIF SANTA BARBARA,DEPT MAT,SANTA BARBARA,CA 93106. RP PHARR, GM (reprint author), RICE UNIV,DEPT MAT SCI,POB 1892,HOUSTON,TX 77251, USA. RI Clarke, David/D-2616-2009; Albe, Karsten/F-1139-2011 NR 27 TC 92 Z9 94 U1 4 U2 17 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD APR PY 1992 VL 7 IS 4 BP 961 EP 972 DI 10.1557/JMR.1992.0961 PG 12 WC Materials Science, Multidisciplinary SC Materials Science GA HP370 UT WOS:A1992HP37000028 ER PT J AU MAYO, MJ SIEGEL, RW LIAO, YX NIX, WD AF MAYO, MJ SIEGEL, RW LIAO, YX NIX, WD TI NANOINDENTATION OF NANOCRYSTALLINE ZNO SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID HARDNESS INDENTATION PROBLEMS; SODA-LIME GLASS; DISLOCATION MODEL; SUPERPLASTICITY; COMPOSITE AB A number of nanocrystalline ceramics have been fabricated by the gas phase condensation technique. The mechanical properties of one of the first ceramics produced by this method, nanophase TiO2, have been discussed in an earlier study 1. This paper reports a similar study undertaken to examine the properties of nanocrystalline ZnO. Nanoindenter techniques are used to determine hardness, Young's modulus, and strain rate sensitivity in ultra-fine grained ZnO. Significant properties variations are experienced within a given sample, indicating a large degree of microstructural inhomogeneity. Nevertheless, a distinct evolution in properties can be observed as a function of sintering temperature. Young's modulus and hardness values increase almost linearly with increasing sintering temperature, and, in addition, there also appears to be a linear correlation between the development of the two materials properties. In contrast, strain rate sensitivity is shown to have an inverse dependence on sintering temperature. This dependence appears to be linked to the strong influence of grain size on strain rate sensitivity, so that the lower sintering temperatures, which provide the finer grain sizes, tend to promote strain rate sensitivity. The results of this study are strikingly similar to those obtained earlier for nanophase TiO2, and they indicate that the earlier results could probably be generalized to a much broader range of nanocrystalline ceramics. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. STANFORD UNIV,DEPT MAT SCI & ENGN,STANFORD,CA 94305. RP MAYO, MJ (reprint author), PENN STATE UNIV,DEPT MAT SCI & ENGN,UNIV PK,PA 16802, USA. NR 22 TC 114 Z9 122 U1 4 U2 23 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD APR PY 1992 VL 7 IS 4 BP 973 EP 979 DI 10.1557/JMR.1992.0973 PG 7 WC Materials Science, Multidisciplinary SC Materials Science GA HP370 UT WOS:A1992HP37000029 ER PT J AU GODBOLE, MJ PEDRAZA, AJ LOWNDES, DH THOMPSON, JR AF GODBOLE, MJ PEDRAZA, AJ LOWNDES, DH THOMPSON, JR TI ROLE OF INTERFACIAL THERMAL-RESISTANCE AND LASER ENERGY DENSITY DURING LASER PROCESSING OF COPPER-SAPPHIRE COUPLES SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID FILMS; ADHESION AB The effect of the interfacial thermal resistance and the laser energy density on film morphology and the extent of evaporation was studied in the excimer laser processing of copper-sapphire couples. Copper films of 80 nm thickness were sputter-deposited on sapphire substrates and laser-irradiated with energy densities in the range of 0.2 to 3.5 J/cm2. The changes in film morphology and thickness as a function of laser energy density were analyzed by energy dispersive x-ray spectroscopy. Four regimes can be established as a function of the laser energy density. First, for low energy densities up to a critical value, the film is partially removed by thermal stresses. Second, as the energy density is increased above that critical value, larger portions of the film remain attached to the substrate. In this regime adhesion enhancement takes place. Third, a further increase in the energy density results in film evaporation. Finally, the decrease in the specific mass removal rate of copper is related to the formation of a laser generated plasma that shields the sample from the incoming radiation. In this last regime, an intermediate compound may form at the substrate surface. The data were correlated with results from a computer model of the heat flow during laser processing of metal-ceramic couples. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996. RP GODBOLE, MJ (reprint author), UNIV TENNESSEE,DEPT MAT SCI & ENGN,KNOXVILLE,TN 37996, USA. NR 15 TC 4 Z9 4 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD APR PY 1992 VL 7 IS 4 BP 1004 EP 1010 DI 10.1557/JMR.1992.1004 PG 7 WC Materials Science, Multidisciplinary SC Materials Science GA HP370 UT WOS:A1992HP37000033 ER PT J AU SUGAMA, T TAYLOR, C AF SUGAMA, T TAYLOR, C TI PYROLYSIS-INDUCED POLYMETALLOSILOXANE COATINGS FOR ALUMINUM SUBSTRATES SO JOURNAL OF MATERIALS SCIENCE LA English DT Article ID X-RAY PHOTOELECTRON; ADHESION; CARBIDE; FILMS; XPS AB Inorganic amorphous polymetallosiloxane (PMS) coating films on aluminium substrate were produced through the polycondensation-pyrolysis reaction mechanisms of a sol-precursor solution. The precursor solution was formed by HCl-catalysed hydrolysis of a mixture of N-[3-(triethoxysilyl)propyl]-4,5-dihydroimidazole (TSPI) and M(OC3H7)n, (M = Zr, Ti and Al, n = 3 or 4). The TSPI/Zr(OC3H7)4 or Ti(OC3H7)4 precursor systems formed higher quality thin coating films, compared to the /Al(OC3H7) system. This was because of the critical formation of the polyorganosiloxane terminated by end groups containing zirconium and titanium oxides. These end groups were derived by a dechlorinating reaction between the Cl, bonded to the propyl C in organosilane, and the hydroxylated Zr or Ti compounds in the sintering stages of the film production. Good film-forming performance resulted from moderate degrees of cross-linking of metal oxides to polysiloxane chains and of the densification of metal -O-Si linkages in the pyrolysis-induced PMS network. In addition to these factors, the formation of an oxane bond at the interface between PMS and aluminium provided corrosion protection for the aluminium substrate. C1 UNIV VIRGINIA,DEPT CHEM,CHARLOTTESVILLE,VA 22901. RP SUGAMA, T (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV PROC SCI,UPTON,NY 11973, USA. NR 23 TC 15 Z9 16 U1 0 U2 3 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD APR 1 PY 1992 VL 27 IS 7 BP 1723 EP 1734 DI 10.1007/BF01107196 PG 12 WC Materials Science, Multidisciplinary SC Materials Science GA HM062 UT WOS:A1992HM06200003 ER PT J AU KIM, YS YEH, L AF KIM, YS YEH, L TI E(2)-SYMMETRICAL 2-MODE SHEARED STATES SO JOURNAL OF MATHEMATICAL PHYSICS LA English DT Article ID PHASE-SPACE METHODS; LINEAR CANONICAL-TRANSFORMATIONS; NONCOMMUTING OPERATORS; QUANTUM MECHANICS; SQUEEZED STATES; CALCULUS; WIGNER; COHERENT AB It is noted that the symmetry of two-mode squeezed states of light is governed by the group Sp (4) that is locally isomorphic to O (3,2). This group has subgroups that are locally isomorphic to the two-dimensional Euclidean group. Two-mode states having the E(2) symmetry are constructed. The translation-like transformations of this symmetry group shear the Wigner distribution function defined over the four-dimensional phase space consisting of two pairs of canonical variables. Sheared states are constructed in the Schrodinger picture of quantum mechanics and in the Fock space for photon numbers. It is shown that the Wigner phase-space picture is a convenient representation of quantum mechanics for calculating measurable quantities of the sheared states. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP KIM, YS (reprint author), UNIV MARYLAND,DEPT PHYS & ASTRON,COLLEGE PK,MD 20742, USA. NR 26 TC 8 Z9 8 U1 0 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0022-2488 J9 J MATH PHYS JI J. Math. Phys. PD APR PY 1992 VL 33 IS 4 BP 1237 EP 1246 DI 10.1063/1.529701 PG 10 WC Physics, Mathematical SC Physics GA HK650 UT WOS:A1992HK65000001 ER PT J AU RANGARAJAN, G NERI, F AF RANGARAJAN, G NERI, F TI CANONICAL REPRESENTATIONS OF SP(2N,R) SO JOURNAL OF MATHEMATICAL PHYSICS LA English DT Article AB In this paper a rather unconventional real basis for the real symplectic algebra sp(2n,R) is studied. This basis is valid for representations carried by homogeneous polynomials of the 2n phase-space variables. The utility of this basis for practical computations is demonstrated by giving a simple derivation of the second- and fourth-order indices of irreducible representations of sp(2n,R). C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV AT,LOS ALAMOS,NM 87545. RP RANGARAJAN, G (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 10 TC 1 Z9 1 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0022-2488 J9 J MATH PHYS JI J. Math. Phys. PD APR PY 1992 VL 33 IS 4 BP 1247 EP 1251 DI 10.1063/1.529702 PG 5 WC Physics, Mathematical SC Physics GA HK650 UT WOS:A1992HK65000002 ER PT J AU MITCHELL, MA GARNER, FA AF MITCHELL, MA GARNER, FA TI NEUTRON-INDUCED SWELLING OF BINARY NI-AL ALLOYS SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article AB Five Ni-Al binary alloys with aluminum levels of 1.1, 2.6, 4.2, 7.1 and 13.3 wt% were irradiated at eight temperatures ranging from 400 to 650-degrees-C in the EBR-II fast reactor. The density changes induced during irradiation were found to be strongly dependent on both aluminum content and the irradiation temperature. Dynamic solute redistribution caused by radiation-induced segregation and the temperature-dependent formation of gamma' phase also appear to contribute significantly to the density changes. C1 PACIFIC NW LAB, MAT RES DEPT, RICHLAND, WA 99352 USA. RP MITCHELL, MA (reprint author), UNIV ILLINOIS, DEPT NUCL ENGN, URBANA, IL 61801 USA. NR 13 TC 4 Z9 4 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD APR PY 1992 VL 187 IS 2 BP 103 EP 108 DI 10.1016/0022-3115(92)90540-2 PG 6 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA HM902 UT WOS:A1992HM90200001 ER PT J AU SAWAI, T SUZUKI, M MAZIASZ, PJ HISHINUMA, A AF SAWAI, T SUZUKI, M MAZIASZ, PJ HISHINUMA, A TI COMPARISON OF IMMERSION DENSITY AND IMPROVED MICROSTRUCTURAL CHARACTERIZATION METHODS FOR MEASURING SWELLING IN SMALL IRRADIATED DISK SPECIMENS SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article ID STAINLESS-STEELS; HFIR AB The procedure of obtaining microstructural data from reactor-irradiated specimens has been carefully checked for accuracy by comparison of swelling data obtained from transmission electron microscopy (TEM) observations of cavities with density-change data measured using the Precision Densitometer at Oak Ridge National Laboratory (ORNL). Comparison of data measured by both methods on duplicate or, in some cases, on the same specimen has shown some appreciable discrepancies for US/Japan collaborative experiments irradiated in the High Flux Isotope Reactor (HFIR). The contamination spot separation (CSS) method was used in the past to determine the thickness of a TEM foil. Recent work has revealed an appreciable error in this method that can result in an overestimation of the foil thickness. This error causes lower swelling values to be measured by TEM microstructural observation relative to the Precision Densitometer. An improved method is proposed for determining the foil thickness by the CSS method, which includes a correction for the systematic overestimation of foil thickness. C1 OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. RP SAWAI, T (reprint author), JAPAN ATOM ENERGY RES INST, TOKAI, IBARAKI 31911, JAPAN. OI Maziasz, Philip/0000-0001-8207-334X NR 17 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 EI 1873-4820 J9 J NUCL MATER JI J. Nucl. Mater. PD APR PY 1992 VL 187 IS 2 BP 146 EP 152 DI 10.1016/0022-3115(92)90546-W PG 7 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA HM902 UT WOS:A1992HM90200007 ER PT J AU BELL, GEC INAZUMI, T KENIK, EA KONDO, T AF BELL, GEC INAZUMI, T KENIK, EA KONDO, T TI ELECTROCHEMICAL AND MICROSTRUCTURAL CHARACTERIZATION OF AN AUSTENITIC STAINLESS-STEEL IRRADIATED BY HEAVY-IONS AT 515-DEGREES-C SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article ID PASSIVE FILMS; SEGREGATION AB The electrochemical and microstructural behavior of a solution-annealed, heavy-ion-irradiated, austenitic stainless steel, designated LS1A, have been investigated at 515-degrees-C after doses of 1, 10 and 30 displacements per atom (dpa). Changes in electrochemical properties due to radiation-induced segregation in thin radiation-affected layers of the material were detected by the electrochemical potentiokinetic reactivation (EPR) technique using TEM disk specimens. At all doses, the Flade potential and reactivation charge were greater than those measured for thermally-aged control specimens. Grain face etching, similar to that found on EPR-tested neutron irradiated austenitic stainless steels, was observed on all specimens after testing. Duplicate heavy ion irradiated specimens were also examined by high resolution analytical electron microscopy (AEM). The 1 dpa specimen showed only a high density of small faulted dislocations (approximately 10 nm), and no grain boundary precipitation or grain boundary segregation was detected. AEM confirmed chromium and molybdenum depletion at grain boundaries as measured by EPR for the 10 and 30 dpa specimens. C1 JAPAN ATOM ENERGY RES INST,TOKAI,IBARAKI 31911,JAPAN. RP BELL, GEC (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. NR 13 TC 12 Z9 12 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD APR PY 1992 VL 187 IS 2 BP 170 EP 179 DI 10.1016/0022-3115(92)90549-Z PG 10 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA HM902 UT WOS:A1992HM90200010 ER PT J AU AXLER, KM SHELDON, RI AF AXLER, KM SHELDON, RI TI THE EFFECT OF INITIAL COMPOSITION ON PUOCL FORMATION IN THE DIRECT OXIDE REDUCTION OF PUO2 SO JOURNAL OF NUCLEAR MATERIALS LA English DT Letter RP AXLER, KM (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV NUCL MAT TECHNOL,LOS ALAMOS,NM 87545, USA. NR 10 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD APR PY 1992 VL 187 IS 2 BP 183 EP 185 DI 10.1016/0022-3115(92)90551-U PG 3 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA HM902 UT WOS:A1992HM90200012 ER PT J AU VOLKOW, ND FOWLER, JS WOLF, AP WANG, GJ LOGAN, J MACGREGOR, R DEWEY, SL SCHLYER, D HITZEMANN, R AF VOLKOW, ND FOWLER, JS WOLF, AP WANG, GJ LOGAN, J MACGREGOR, R DEWEY, SL SCHLYER, D HITZEMANN, R TI DISTRIBUTION AND KINETICS OF CARBON-11-COCAINE IN THE HUMAN-BODY MEASURED WITH PET SO JOURNAL OF NUCLEAR MEDICINE LA English DT Article ID VENTRICULAR-FIBRILLATION; CHROMAFFIN CELLS; COCAINE; BRAIN; RECEPTORS; HEART; NOREPINEPHRINE; NORADRENALINE; ABUSE; SITES AB The extent to which the toxic properties of cocaine are related to its accumulation in various organs is not known. This study investigates cocaine uptake in the human body using C-11-cocaine and PET in 14 healthy males. The rate of uptake and clearance of C-11-cocaine varied among organs: peak uptake occurred in the lungs at 45 sec, in the heart and kidneys at 2-3 min, in the adrenals at 7-9 min, and in the liver at 10-15 min. Half-peak clearances were 90 sec in the lungs, 10 min in the heart and kidneys and 22 min in the adrenals. Liver radioactivity plateaued 10-15 min after injection and remained constant thereafter (40 min). Lung radioactivity paralleled that of plasma. The average uptake at peak was 0.007% (s.d., 0.001) dose/cc in the heart, 0.014% (s.d., 0.002) dose/cc in the kidney, 0.014% (s.d., 0.002) dose/cc in the liver and 0.034% (s.d., 0.001) dose/cc in the adrenals. The significant accumulation of cocaine in human heart, kidneys, adrenals and liver could contribute to its toxicity. C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. SUNY STONY BROOK,DEPT PSYCHIAT,STONY BROOK,NY 11794. RP VOLKOW, ND (reprint author), BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973, USA. FU NIDA NIH HHS [R01 DA 06278] NR 42 TC 52 Z9 52 U1 2 U2 2 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD APR PY 1992 VL 33 IS 4 BP 521 EP 525 PG 5 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA HM082 UT WOS:A1992HM08200015 PM 1552335 ER PT J AU OBRIEN, MH TELSCHOW, KL KNIBLOE, JR AF OBRIEN, MH TELSCHOW, KL KNIBLOE, JR TI ANALYSIS OF AS-MACHINED NUCLEAR GRAPHITE PARTS USING CONVENTIONAL AND LASER ULTRASONIC TECHNIQUES SO JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY LA English DT Article DE NONDESTRUCTIVE TESTING; NONCONTACTING LASER ULTRASONICS; MONITORING; GRAPHITE; GRAIN SIZE; MICROSTRUCTURE; ANISOTROPY; X-RAY DIFFRACTION; ELECTRICAL RESISTIVITY; CONTACTING ULTRASONICS; FEASIBILITY STUDIES ID TEXTURE AB The feasibility of remote, in-service monitoring of as-machined nuclear graphite parts using noncontacting laser ultrasonics was investigated. The anisotropy sensitivities of laser ultrasonics and several other conventional techniques were compared for three significantly different nuclear-grade graphites. Laser ultrasonics using a Fabry-Perot interferometer proved sufficiently sensitive to detect the anisotropy in a bulk graphite having moderate grain size. In contrast, a coarse-grained graphite was difficult or impossible to investigate using any of the techniques. Laser ultrasonic monitoring of some graphites may be useful in future nuclear operations, particularly for in-service applications where contacting and destructive analyses are unsuitable. RP EG&G IDAHO INC, IDAHO NATL ENGN LAB, POB 1625, IDAHO FALLS, ID 83415 USA. NR 13 TC 1 Z9 1 U1 2 U2 4 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0022-3131 EI 1881-1248 J9 J NUCL SCI TECHNOL JI J. Nucl. Sci. Technol. PD APR PY 1992 VL 29 IS 4 BP 378 EP 387 DI 10.1080/18811248.1992.9731537 PG 10 WC Nuclear Science & Technology SC Nuclear Science & Technology GA HX228 UT WOS:A1992HX22800008 ER PT J AU GUAN, XJ LANGSTON, MA AF GUAN, XJ LANGSTON, MA TI PARALLEL METHODS FOR SOLVING FUNDAMENTAL FILE REARRANGEMENT PROBLEMS SO JOURNAL OF PARALLEL AND DISTRIBUTED COMPUTING LA English DT Note C1 UNIV TENNESSEE,DEPT COMP SCI,KNOXVILLE,TN 37996. RP GUAN, XJ (reprint author), OAK RIDGE NATL LAB,DIV ENGN PHYS & MATH,OAK RIDGE,TN 37831, USA. RI Langston, Michael/A-9484-2011 NR 5 TC 0 Z9 0 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0743-7315 J9 J PARALLEL DISTR COM JI J. Parallel Distrib. Comput. PD APR PY 1992 VL 14 IS 4 BP 436 EP 439 DI 10.1016/0743-7315(92)90082-X PG 4 WC Computer Science, Theory & Methods SC Computer Science GA HM081 UT WOS:A1992HM08100008 ER PT J AU SMITH, AB GUENTHER, PT WHALEN, JF CHIBA, S AF SMITH, AB GUENTHER, PT WHALEN, JF CHIBA, S TI FAST-NEUTRON TOTAL AND SCATTERING CROSS-SECTIONS OF NI-58 AND NUCLEAR-MODELS SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS LA English DT Article ID OPTICAL-MODEL; ENERGY-DEPENDENCE; ELASTIC-SCATTERING; STATE; INDIUM; NI-60 AB Neutron total cross sections of Ni-58 are measured from congruent-to 1 to > 10 MeV using white-source techniques. Differential neutron elastic scattering cross sections are measured from congruent-to 4.5 to 10 MeV at congruent-to 0.5 MeV intervals with greater-than-or-equal-to 75 differential values per distribution. Differential neutron inelastic scattering cross sections are measured, corresponding to fourteen levels with excitations up to congruent-to 4.8 MeV. The measured results, combined with relevant data available in the literature, are interpreted and the physical implications discussed in the contexts of optical-statistical, dispersive-optical and coupled-channels models. C1 JAPAN ATOM ENERGY RES INST,TOKAI,IBARAKI 31911,JAPAN. RP SMITH, AB (reprint author), ARGONNE NATL LAB,DIV ENGN PHYS,BLDG 314,9700 S CASS,ARGONNE,IL 60439, USA. RI Chiba, Satoshi/E-8193-2014 NR 61 TC 10 Z9 10 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0954-3899 J9 J PHYS G NUCL PARTIC JI J. Phys. G-Nucl. Part. Phys. PD APR PY 1992 VL 18 IS 4 BP 629 EP 654 DI 10.1088/0954-3899/18/4/004 PG 26 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA HK791 UT WOS:A1992HK79100004 ER PT J AU LIU, H YEH, TF LEE, HS SKOTHEIM, TA OKAMOTO, Y AF LIU, H YEH, TF LEE, HS SKOTHEIM, TA OKAMOTO, Y TI THE EFFECT OF THE STERIC HINDRANCE ON METALLIC CATION CONDUCTION IN POLYMER ELECTROLYTES SO JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY LA English DT Article DE POLYISOCYANATES; POLYMER ELECTROLYTES; METALLIC CATION CONDUCTING POLYMERS; STERIC HINDERED PHENOLS AB 2,6-Di-t-butylphenol and oligo(ethylene oxide) bound covalently to polyisocyanate were synthesized and characterized. The ionic conductivities of their Li, Na, and K phenolates were studied at various temperatures. The conductivities were in the range of 10(-7)-10(-5) S/cm at 30-degrees-C. The conductivity of Na and K salts was approximately 10(2) greater than that of the Li salts. The t-butyl groups serve to dissociate K and Na ions from the phenoxide. The cations, therefore, are more mobile as a result increasing the conductivity. The temperature dependence of ionic conductivity suggests that the migration of ions is controlled by segmental motion of the polymer, shown by linear curves obtained in Vogel-Tammann-Fulchere plots. The polyisocyanate backbone is a rather stiff structure, however, a flexible oligo(ethylene oxide) side chain forms complexes with metal ion. Since the ion transport is associated with the local movement of polymer segments, the rigidity of the polymer backbone does not have much influence on the ion mobility. C1 POLYTECH INST NEW YORK,DEPT CHEM,333 JAY ST,BROOKLYN,NY 11201. POLYTECH INST NEW YORK,INST POLYMER RES,BROOKLYN,NY 11201. BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. NR 22 TC 7 Z9 7 U1 0 U2 2 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0887-624X J9 J POLYM SCI POL CHEM JI J. Polym. Sci. Pol. Chem. PD APR PY 1992 VL 30 IS 5 BP 879 EP 885 DI 10.1002/pola.1992.080300519 PG 7 WC Polymer Science SC Polymer Science GA HJ494 UT WOS:A1992HJ49400019 ER PT J AU KELLER, BJ MCKIBBIN, TT ERIKSON, AL FILBY, CW AF KELLER, BJ MCKIBBIN, TT ERIKSON, AL FILBY, CW TI THE SEQUENTIAL SEPARATION OF TC-99 AND I-129 IN WASTE SAMPLES SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES LA English DT Article AB A unique Procedure permitting the determination of Tc-99 and I-129 in the same portion of sample is presented. Various matrices of environmental waste samples are spiked with Tc-95 and iodide carrier, ashed, fused, and analyzed. The matrices analyzed included various types of filters, resin, evaporator salts, floor silt, sludge and charcoal. The technetium isotopes and iodine isotopes are sequentially separated by organic extraction techniques. RP KELLER, BJ (reprint author), WESTINGHOUSE IDAHO NUCL CO,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83403, USA. NR 3 TC 10 Z9 10 U1 0 U2 0 PU AKADEMIAI KIADO PI BUDAPEST PA PO BOX 245, H-1519 BUDAPEST, HUNGARY SN 0236-5731 J9 J RADIOAN NUCL CH AR JI J. Radioanal. Nucl. Chem.-Artic. PD APR PY 1992 VL 158 IS 1 BP 75 EP 78 DI 10.1007/BF02034774 PG 4 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA HT272 UT WOS:A1992HT27200008 ER PT J AU HALL, HL AF HALL, HL TI RADIOCHEMICAL EXTRACTION OF PALLADIUM WITH DIMETHYLGLYOXIME SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES LA English DT Note AB The solvent extraction behavior of the palladium-dimethylglyoxime complex has been studied in acidic media under conditions applicable for radiochemical studies of short-lived activities. Distribution coefficients have been determined in HCl, HNO3, and HClO4 as a function of acid concentration for the extraction of carrier-free palladium by dimethylglyoxime in chloroform. RP HALL, HL (reprint author), UNIV CALIF L233 LAWRENCE LIVERMORE NATL LAB,DIV NUCL CHEM,LIVERMORE,CA 94551, USA. OI Hall, Howard/0000-0002-4080-5159 NR 7 TC 2 Z9 3 U1 1 U2 1 PU AKADEMIAI KIADO PI BUDAPEST PA PO BOX 245, H-1519 BUDAPEST, HUNGARY SN 0236-5731 J9 J RADIOAN NUCL CH AR JI J. Radioanal. Nucl. Chem.-Artic. PD APR PY 1992 VL 158 IS 1 BP 211 EP 214 DI 10.1007/BF02034787 PG 4 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA HT272 UT WOS:A1992HT27200021 ER PT J AU DINGMAN, SE INGBER, MS MONDY, LA ABBOTT, JR BRENNER, H AF DINGMAN, SE INGBER, MS MONDY, LA ABBOTT, JR BRENNER, H TI PARTICLE TRACKING IN 3-DIMENSIONAL STOKES-FLOW SO JOURNAL OF RHEOLOGY LA English DT Article ID HYDRODYNAMIC INTERACTIONS; VISCOUS-FLUID; MULTIPARTICLE SYSTEMS; DYNAMIC SIMULATION; SPHERES; SUSPENSIONS AB The three-dimensional motions of particles settling in Stokes flow are tracked numerically and experimentally. The numerical simulations are performed using a boundary element representation of the Stokes flow equations coupled with an Euler parameter representation of the particle kinematics. The experiments provide quantitative, three-dimensional results for particle trajectories in Stokes flow. The experimental and numerical results are compared and found to agree to within the experimental uncertainty. The numerical results are also benchmarked against previously reported results for two test problems. C1 UNIV NEW MEXICO,DEPT MECH ENGN,ALBUQUERQUE,NM 87131. SANDIA NATL LABS,DIV COMPUTAT FLUID DYNAM,ALBUQUERQUE,NM 87185. MIT,DEPT CHEM ENGN,BOSTON,MA 02139. RP DINGMAN, SE (reprint author), SANDIA NATL LABS,DIV REACTOR SYST SAFETY ANAL,ALBUQUERQUE,NM 87185, USA. NR 31 TC 10 Z9 10 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0148-6055 J9 J RHEOL JI J. Rheol. PD APR PY 1992 VL 36 IS 3 BP 413 EP 440 DI 10.1122/1.550352 PG 28 WC Mechanics SC Mechanics GA HM929 UT WOS:A1992HM92900001 ER PT J AU RAVITCH, D AF RAVITCH, D TI THE ROLE OF THE FEDERAL-GOVERNMENT IN PROMOTING HEALTH THROUGH THE SCHOOLS - REPORT FROM THE DEPARTMENT-OF-EDUCATION SO JOURNAL OF SCHOOL HEALTH LA English DT Editorial Material RP RAVITCH, D (reprint author), US DOE,OFF EDUC RES & IMPROVEMENT,555 NEW JERSEY AVE NW,ROOM 600,WASHINGTON,DC 20208, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SCHOOL HEALTH ASSOC PI KENT PA PO BOX 708, KENT, OH 44240 SN 0022-4391 J9 J SCHOOL HEALTH JI J. Sch. Health PD APR PY 1992 VL 62 IS 4 BP 141 EP 142 PG 2 WC Education & Educational Research; Education, Scientific Disciplines; Health Care Sciences & Services; Public, Environmental & Occupational Health SC Education & Educational Research; Health Care Sciences & Services; Public, Environmental & Occupational Health GA HZ497 UT WOS:A1992HZ49700011 PM 1507865 ER PT J AU MCDOWELL, HK CLOGSTON, AM AF MCDOWELL, HK CLOGSTON, AM TI EXACT TIME CORRELATION-FUNCTION FOR A NONLINEARLY COUPLED VIBRATIONAL SYSTEM SO JOURNAL OF STATISTICAL PHYSICS LA English DT Article DE TIME CORRELATION FUNCTION; LONG-TIME TAIL; NONLINEAR; GENERALIZED LANGEVIN EQUATION ID LANGEVIN EQUATION THEORY; DIMENSIONAL MOLECULAR-CRYSTALS; VIBRON SOLITONS; POLARON FORMATION; EQUIVALENT CHAIN; OSCILLATOR; SPECTRA AB The time correlation function chi(t) = Re [[c(t), c+(0)]], which is related to the dipole spectrum and is the main focus of quantum molecular time scale generalized Langevin equation theory, is calculated for the Hamiltonian system in which a single oscillator is coupled by a nonlinear Davydov term to a chain of oscillators comprising a phonon heat bath. An exact expression for chi(t) is obtained. At long times we find that the time correlation function decays as a small power law at T = 0K, but switches to exponential decay at higher temperature. This is a new result and bears on the long-standing issue of the existence of long-time tails. RP MCDOWELL, HK (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,CTR MAT SCI,CLS-2 MS J565,LOS ALAMOS,NM 87545, USA. NR 25 TC 8 Z9 8 U1 0 U2 1 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0022-4715 J9 J STAT PHYS JI J. Stat. Phys. PD APR PY 1992 VL 67 IS 1-2 BP 331 EP 346 DI 10.1007/BF01049038 PG 16 WC Physics, Mathematical SC Physics GA HR915 UT WOS:A1992HR91500015 ER PT J AU GAUTESEN, AK AF GAUTESEN, AK TI ON THE ASYMPTOTIC SOLUTION TO THE INTEGRAL-EQUATIONS CORRESPONDING TO THE SCATTERING BY METALLIC DISKS SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID HIGH-FREQUENCY SCATTERING; GRIFFITH CRACK; INCIDENT PLANE AB For the steady-state problem of the scattering of plane electromagnetic waves by metallic disks, the leading order term of the high-frequency asymptotic expansion of the surface current density is found. For the far-field coefficient, good agreement is found with numerical results for both amplitude and phase. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT MATH,AMES,IA 50011. RP GAUTESEN, AK (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 12 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD APR PY 1992 VL 91 IS 4 BP 1805 EP 1808 DI 10.1121/1.403710 PN 1 PG 4 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA HP367 UT WOS:A1992HP36700001 ER PT J AU SEGALMAN, DJ LOBITZ, DW AF SEGALMAN, DJ LOBITZ, DW TI A METHOD TO OVERCOME COMPUTATIONAL DIFFICULTIES IN THE EXTERIOR ACOUSTICS PROBLEM SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID BOUNDARY AB When the boundary integral equation method is applied to exterior acoustics problems, singularities occur in the resulting algebraic equations at various frequencies associated with the eigenvalues of an interior problem. These frequencies are referred to as "forbidden," and various methods have been devised to overcome the computational difficulties presented at these frequencies. The work presented here is an extension to the CHIEF method in that higher derivatives, in addition to the function itself, are constrained to be zero at selected points in the interior domain. Whereas the relative success of either method depends on the quantity and selection of interior points, the SuperCHIEF method requires fewer interior points and is less sensitive to point selection, resulting in improved robustness without a significant increase in computational complexity. RP SEGALMAN, DJ (reprint author), SANDIA NATL LABS,DIV APPL MECH 1524,ALBUQUERQUE,NM 87185, USA. NR 8 TC 19 Z9 19 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD APR PY 1992 VL 91 IS 4 BP 1855 EP 1861 DI 10.1121/1.403715 PN 1 PG 7 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA HP367 UT WOS:A1992HP36700006 ER PT J AU GROSS, J FRICKE, J HRUBESH, LW AF GROSS, J FRICKE, J HRUBESH, LW TI SOUND-PROPAGATION IN SIO2 AEROGELS SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article AB The longitudinal sound velocity upsilon(L) of pure SiO2 aerogels with densities in the range of 5 to 500 kg m-3, either made from TEOS (tetraethoxysilane), TMOS (tetramethoxysilane), or waterglass was measured. The variation of upsilon(L) with density rho for evacuated aerogels is more complex than described earlier: The simple scaling law upsilon(L) is-proportional-to rho(alpha), with alpha = 1.3, only holds for rho > 100 kg m-3; below this density alpha almost-equal-to 0.8 is valid. Data are also collected for sintered SiO2 aerogels. For specimens with densities around 100 kg m-3 or below, sound velocity measurements under variation of air pressure have also been performed. The dependence of the sound velocity on air pressure can be correctly described by a simple theory involving quasi-isothermal compression of the gas within the pores. From these findings a reliable method to determine the macroscopic aerogel density is derived. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP GROSS, J (reprint author), UNIV WURZBURG,INST PHYS,W-8700 WURZBURG,GERMANY. NR 14 TC 45 Z9 46 U1 1 U2 13 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD APR PY 1992 VL 91 IS 4 BP 2004 EP 2006 DI 10.1121/1.403684 PN 1 PG 3 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA HP367 UT WOS:A1992HP36700022 ER PT J AU FUSCO, AM WARD, WC SWIFT, GW AF FUSCO, AM WARD, WC SWIFT, GW TI 2-SENSOR POWER MEASUREMENTS IN LOSSY DUCTS SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID ACOUSTIC PROPERTIES; FLOW AB Theory and measurements of the use of two adjacent pressure sensors to measure acoustic power flow of a simple harmonic sound wave in a duct are presented. This theory differs from the usual intensity-times-area formulation of this problem by including the phase shift between pressure gradient and velocity, which is caused by viscous drag on the gas at the duct wall. For high standing-wave ratios, the power obtained by this method differs significantly from the product of mid-duct intensity and duct area. These measurements confirm the method to an accuracy of 5%, even at high amplitudes where the acoustic flow is turbulent and the theory might not necessarily be valid. RP FUSCO, AM (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. NR 18 TC 83 Z9 92 U1 1 U2 7 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD APR PY 1992 VL 91 IS 4 BP 2229 EP 2235 DI 10.1121/1.403656 PN 1 PG 7 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA HP367 UT WOS:A1992HP36700046 PM 1597611 ER PT J AU COULTER, RL SHANNON, JD MARTIN, TJ COOK, DR AF COULTER, RL SHANNON, JD MARTIN, TJ COOK, DR TI A PORTABLE SYSTEM FOR PREDICTION OF A TRANSIENT PLUME SO JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION LA English DT Article AB Field tests of a highly portable system coupling a minisodar that measures vertical profiles of wind and turbulence with a dispersion model are described. The field tests used SO2 plumes from a large, elevated source near Oak Ridge, Tennessee, as targets of opportunity to demonstrate the capabilities of the system. Subjective model verification measurements were made with instruments mounted on a mobile vehicle. Model results seem to be consistent with limited observational data, but a more rigorous evaluation involving more extensive measurements of a unique tracer is desirable. RP COULTER, RL (reprint author), ARGONNE NATL LAB,DIV ENVIRONM RES,ARGONNE,IL 60439, USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU AIR & WASTE MANAGEMENT ASSOC PI PITTSBURGH PA PO BOX 2861, PITTSBURGH, PA 15230 SN 1047-3289 J9 J AIR WASTE MANAGE JI J. Air Waste Manage. Assoc. PD APR PY 1992 VL 42 IS 4 BP 433 EP 436 PG 4 WC Engineering, Environmental; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA HR022 UT WOS:A1992HR02200004 ER PT J AU STUMP, DM AF STUMP, DM TI EDGE-CRACK RESISTANCE CURVES IN SUPERCRITICAL CERAMICS SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID TRANSFORMATION-TOUGHENED CERAMICS; GROWTH AB The growth of edge cracks in zirconia-reinforced ceramics is analyzed theoretically with the "supercritical" transformation model. The injection of an initial edge crack by a damage process is modeled in an approximate manner. Subsequent crack growth under the application of a remote tensile stress models the evolution of the transformed region as the crack advances. For the range of initial crack sizes considered, "nominal" resistance curves depend strongly on a transformation-toughening parameter. The analysis may have a bearing on the indentation/bend method of testing fracture toughnesses. C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545. NR 10 TC 5 Z9 5 U1 0 U2 0 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD APR PY 1992 VL 75 IS 4 BP 889 EP 895 DI 10.1111/j.1151-2916.1992.tb04156.x PG 7 WC Materials Science, Ceramics SC Materials Science GA HN328 UT WOS:A1992HN32800019 ER PT J AU FISHER, ES MANGHNANI, MH WANG, JF ROUTBORT, JL AF FISHER, ES MANGHNANI, MH WANG, JF ROUTBORT, JL TI ELASTIC PROPERTIES OF AL2O3 AND SI3N4 MATRIX COMPOSITES WITH SIC WHISKER REINFORCEMENT SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID ALUMINA; CREEP AB A study of the elastic moduli of Al2O3 and Si3N4 ceramics reinforced with 0 to 25 wt% SiC whiskers has been performed. The Young's moduli, shear moduli, and longitudinal modulus are compared with calculated predictions for aligned fiber composites by Hill and Hashin and Rosen, and for fibers randomly oriented in three dimensions by Christensen and Waal. The measured values are in excellent quantitative agreement with those derived for the random orientation of the SiC whiskers. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. MAT CONSULTING SERV,MINNETONKA,MN 55343. RP FISHER, ES (reprint author), UNIV HAWAII,SCH OCEAN & EARTH SCI & TECHNOL,DEPT GEOL & GEOPHYS,HONOLULU,HI 96822, USA. NR 32 TC 19 Z9 19 U1 1 U2 4 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD APR PY 1992 VL 75 IS 4 BP 908 EP 914 DI 10.1111/j.1151-2916.1992.tb04159.x PG 7 WC Materials Science, Ceramics SC Materials Science GA HN328 UT WOS:A1992HN32800022 ER PT J AU MCBREEN, J LIN, IC AF MCBREEN, J LIN, IC TI X-RAY ABSORPTION STUDIES OF PEO-ZNBR2 COMPLEXES SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID AQUEOUS-SOLUTION; POLYMERIC ELECTROLYTES; ZINC BROMIDE; DIFFRACTION; HYDRATION; EXAFS; ZNSO4 AB Polyethylene oxide (PEO)-ZnBr2 complexes, of the composition ZnBr2(PEO)8, were investigated by extended x-ray absorption fine structure spectroscopy in the temperature range 25 to 120-degrees-C. The results at all temperatures were very similar, and were consistent with the presence of largely undissociated ZnBr2 species that were coordinated with four oxygens from the PEO. The respective calculated Zn-Br and Zn-O bond lengths were 2.34 and 2.23 angstrom. There is evidence of some ZnBr2 dissociation at higher temperatures. A mechanism, based on Br- ion hopping between anchored species of ZnBr2 and ZnBr+ in PEO, is proposed to explain reported transport number and conductivity data. RP MCBREEN, J (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973, USA. NR 32 TC 22 Z9 23 U1 0 U2 0 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD APR PY 1992 VL 139 IS 4 BP 960 EP 966 DI 10.1149/1.2069375 PG 7 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA HN522 UT WOS:A1992HN52200008 ER PT J AU LILLARD, RS MORAN, PJ ISAACS, HS AF LILLARD, RS MORAN, PJ ISAACS, HS TI A NOVEL METHOD FOR GENERATING QUANTITATIVE LOCAL ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID VIBRATING ELECTRODE TECHNIQUE; CORROSION; ALUMINUM; STEEL AB A local electrochemical impedance spectroscopy (LEIS) technique for mapping the ac impedance distribution, as a function of frequency, of an electrode has been developed. In LEIS, as in traditional ac impedance methods, a sinusoidal voltage perturbation between the working and reference electrode is maintained by driving an ac current between the working electrode and a distant counterelectrode with a potentiostat. Local ac impedances are then derived from the ratio of the applied ac voltage and the local ac solution current density. The local ac current density is obtained from potential difference measurements near the electrode surface using a probe consisting of two micro-electrodes. By measuring the ac potential difference between the micro-electrodes, and knowing their separation distance and the solution conductivity, the local ac solution current density is derived. The accuracy of the local ac impedance data generated with this technique was established by investigating two model systems. The first provided a homogeneous electrode which allowed LEIS measurements to be compared to traditional EIS, while the second system provided a heterogeneity of known size and location whose components were easily characterized with traditional techniques. It is shown that area-normalized scanning ac impedance measurements of the homogeneous electrode agreed well with traditional results. In addition, because LEIS maps the impedance properties of an electrode, the defect in the heterogeneous electrode was easily detected, while traditional ac impedance of this electrode gave little indication of its presence. C1 USN ACAD,DEPT MECH ENGN,ANNAPOLIS,MD 21402. BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. RP LILLARD, RS (reprint author), JOHNS HOPKINS UNIV,DEPT MAT SCI & ENGN,BALTIMORE,MD 21218, USA. NR 24 TC 117 Z9 119 U1 1 U2 23 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD APR PY 1992 VL 139 IS 4 BP 1007 EP 1012 DI 10.1149/1.2069332 PG 6 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA HN522 UT WOS:A1992HN52200016 ER PT J AU BLOOM, I HASH, MC AF BLOOM, I HASH, MC TI CERAMIC GLASS ELECTROLYTES FOR SODIUM-ION-CONDUCTING APPLICATIONS SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID COMPOSITE ELECTROLYTES AB Composites electrolytes made from beta"-Al2O3 and Na2O-Al2O3-SiO2 glasses have been developed. The resulting composite is a highly conductive material. At 250-degrees-C, its resistivity is about 20 OMEGA-cm, which appears to be adequate for use as the electrolyte in high-performance Na/S or Na/NiCl2 cells. Further testing is needed to evaluate the composite's chemical stability against sodium. RP BLOOM, I (reprint author), ARGONNE NATL LAB,DIV CHEM TECHNOL,ELECTROCHEM TECHNOL PROGRAM,ARGONNE,IL 60439, USA. NR 24 TC 1 Z9 1 U1 2 U2 4 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD APR PY 1992 VL 139 IS 4 BP 1115 EP 1118 DI 10.1149/1.2069349 PG 4 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA HN522 UT WOS:A1992HN52200033 ER PT J AU HOU, PY SHUI, ZR CHUANG, GY STRINGER, J AF HOU, PY SHUI, ZR CHUANG, GY STRINGER, J TI EFFECT OF REACTIVE ELEMENT OXIDE COATINGS ON THE HIGH-TEMPERATURE OXIDATION BEHAVIOR OF A FECRAL ALLOY SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID AL2O3 SCALES; ADHERENCE; ADDITIONS; ADHESION; DISPERSIONS; MECHANISM; YTTRIUM AB Thin coatings of nitrate-converted oxides of Y, Zr, Hf, Ce, La, Ca, and Al have been applied to the surface of a Fe-18 weight percent (w/o) Cr-5 w/o Al alloy by hot-dipping. The influence of these coatings on the oxidation behavior of the alloy was studied at 1100 and 1200-degrees-C. Results were also compared with the oxidation of a 1 w/o Hf-containing alloy of the same base composition, with or without the application of selected coatings. It was found that all of the coated FeCrAl samples, apart from that coated with aluminum oxide, developed extremely convoluted Al2O3 scales. Oxide ridges several times larger than those formed on the untreated alloy developed at the oxidation temperature. These convoluted scales showed good spallation resistance after isothermal testing, but failed under thermal cyclic conditions. A thin layer of sulfur was found everywhere at the scale/alloy interface. The primary effect of the surface coatings was to increase the number of buckles in the oxide at the early stage of oxidation. Growth of the buckled oxide into large ridges took place by way of aluminum vapor phase transport and oxide lateral growth. The results are discussed in relation to the effect of reactive elements in improving scale adhesion, and it is suggested that the mechanisms governing this effect may be different for Al2O3-forming and for Cr2O3-forming alloys. C1 ELECT POWER RES INST,PALO ALTO,CA 94304. RP HOU, PY (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720, USA. NR 22 TC 60 Z9 66 U1 1 U2 10 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD APR PY 1992 VL 139 IS 4 BP 1119 EP 1126 DI 10.1149/1.2069350 PG 8 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA HN522 UT WOS:A1992HN52200034 ER PT J AU CHEN, LC KURISU, W LJUNG, BM GOLDMAN, ES MOORE, D SMITH, HS AF CHEN, LC KURISU, W LJUNG, BM GOLDMAN, ES MOORE, D SMITH, HS TI HETEROGENEITY FOR ALLELIC LOSS IN HUMAN BREAST-CANCER SO JOURNAL OF THE NATIONAL CANCER INSTITUTE LA English DT Article ID HETEROZYGOSITY; PROGRESSION; TUMORS; HOMOZYGOSITY; ALLELOTYPE; CARCINOMA; GENES AB Background: Loss of heterozygosity (LOH) at specific chromosomal regions in the tumor cells implicates the presence of tumor suppressor genes. However, it is also possible for an LOH to be randomly acquired and irrelevant to tumor development. Purpose: To determine whether a particular LOH in human breast carcinomas represents a loss of tumor suppressor gene or merely a random loss, we analyzed untreated primary breast cancers for LOH. Methods: Ninety-eight primary human breast cancers from previously untreated patients were analyzed for LOH at 12 chromosomal regions including five randomly selected regions and seven regions previously reported in other cancer types and/or breast cancers. Results: The baseline incidence of LOH was five out of 124 tests (4%) using randomly selected probes on chromosomes 1p, 2p, 4p, 11q, and Xq. Incidences of LOH significantly greater than background were seen in the following chromosomal regions: 22q (10 of 26 cases, 38%); 18p (five of 24 cases, 21%); 17p (30 of 59 cases, 51%); 13q (five of 14 cases, 36 %); 3p (13 of 28 cases, 46%); and 1q (18 of 70 cases, 26%). In contrast to previous reports, the incidence of LOH was not significantly different from background for 11p15. In all cases, results were the same for metastatic lymph nodes and primary tumors, suggesting that the losses occurred early in the malignant progression. In cases with LOH at more than one locus, the same DNA sample often varied in degree of signal reduction for the missing alleles. Conclusion: These observations indicate the presence of both intertumor and intratumor heterogeneity for LOH. C1 CALIF PACIFIC MED CTR,GERALDINE BRUSH CANC RES INST,2330 CLAY ST,SAN FRANCISCO,CA 94115. UNIV CALIF SAN FRANCISCO,SCH MED,SAN FRANCISCO,CA 94143. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DIV BIOMED SCI,LIVERMORE,CA 94550. FU NCI NIH HHS [CA-44768] NR 20 TC 148 Z9 148 U1 0 U2 0 PU NATL CANCER INSTITUTE PI BETHESDA PA 9030 OLD GEORGETOWN RD, BETHESDA, MD 20814 SN 0027-8874 J9 J NATL CANCER I JI J. Natl. Cancer Inst. PD APR 1 PY 1992 VL 84 IS 7 BP 506 EP 510 DI 10.1093/jnci/84.7.506 PG 5 WC Oncology SC Oncology GA HM284 UT WOS:A1992HM28400017 PM 1312176 ER PT J AU MAULBECKER, C MOHR, I GLUZMAN, Y BARTHOLOMEW, J BOTCHAN, M AF MAULBECKER, C MOHR, I GLUZMAN, Y BARTHOLOMEW, J BOTCHAN, M TI A DELETION IN THE SIMIAN VIRUS-40 LARGE T-ANTIGEN IMPAIRS LYTIC REPLICATION IN MONKEY CELLS INVIVO BUT ENHANCES DNA-REPLICATION INVITRO - NEW COMPLEMENTATION FUNCTION OF T-ANTIGEN SO JOURNAL OF VIROLOGY LA English DT Article ID LARGE-TUMOR-ANTIGEN; SV40 LARGE-T; RETINOBLASTOMA SUSCEPTIBILITY GENE; DEFECTIVE-MUTANTS; HUMAN-FIBROBLASTS; CELLULAR PROTEIN; POLYMERASE-ALPHA; TRANS-ACTIVATION; ORIGIN-BINDING; TRANSFORMATION AB We describe a new complementation function within the simian virus 40 (SV40) A gene. This function is required for viral DNA replication and virus production in vivo but, surprisingly, does not affect any of the intrinsic enzymatic functions of T antigen directly required for in vitro DNA replication. Other well-characterized SV40 T-antigen mutants, whether expressed stably from integrated genomes or in cotransfection experiments, complement these mutants for in vivo DNA replication and plaque formation. These new SV40 mutants were isolated and cloned from human cells which stably carry the viral DNA. The alteration in the large-T-antigen gene was shown by marker rescue and nucleotide sequence analysis to be a deletion of 322 bp spanning the splice-donor site of the first exon, creating a 14-amino-acid deletion in the large T antigen. The mutant gene was expressed in H293 human cells from an adenovirus vector, and the protein was purified by immunoaffinity chromatography. The mutant protein directs greater levels of DNA replication in vitro than does the wild-type protein. Moreover, the mutant protein reduces the lag time for in vitro DNA synthesis and can be diluted to lower levels than wild-type T antigen and still promote good replication, which is in clear contrast to the in vivo situation. These biochemical features of the protein are independent of the source of the cellular replication factors (i.e., HeLa, H293, COS 7, or CV1 cells) and the cells from which the T antigens were purified. The mutant T antigen does not transform Rat-2 cells. Several different models which might reconcile the differences observed in vivo and in vitro are outlined. We propose that the function of T antigen affected prepares cells for SV40 replication by activation of a limiting cellular replication factor. Furthermore, a link between the induction of a cellular replication factor and transformation by SV40 is discussed. C1 UNIV CALIF BERKELEY,DEPT MOLEC & CELLULAR BIOL,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CHEM BIODYNAM LAB,BERKELEY,CA 94720. COLD SPRING HARBOR LAB,COLD SPRING HARBOR,NY 11724. FU NCI NIH HHS [CA 30490]; NIEHS NIH HHS [ES01896] NR 77 TC 18 Z9 19 U1 0 U2 0 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0022-538X J9 J VIROL JI J. Virol. PD APR PY 1992 VL 66 IS 4 BP 2195 EP 2207 PG 13 WC Virology SC Virology GA HJ504 UT WOS:A1992HJ50400044 PM 1312627 ER PT J AU ONEILL, RV GARDNER, RH TURNER, MG ROMME, WH AF ONEILL, RV GARDNER, RH TURNER, MG ROMME, WH TI EPIDEMIOLOGY THEORY AND DISTURBANCE SPREAD ON LANDSCAPES SO LANDSCAPE ECOLOGY LA English DT Article DE DISTURBANCE; SPATIAL PATTERN; LANDSCAPE ECOLOGY AB Epidemiology models, modified to include landscape pattern, are used to examine the relative importance of landscape geometry and disturbance dynamics in determining the spatial extent of a disturbance, such as a fire. The models indicate that, except for very small values for the probability of spread, a disturbance tends to propagate to all susceptible sites that can be reached. Therefore, spatial pattern, rather than disturbance dynamics, will ordinarily determine the total extent of a single disturbance event. The models also indicate that a single disturbance will seldom become endemic, i.e., always present on the landscape. However, increasing disturbance frequency can lead to a landscape in which the proportion of susceptible, disturbed, and recovering sites are relatively constant. RP ONEILL, RV (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831, USA. RI Turner, Monica/B-2099-2010; Romme, William/C-7317-2016 NR 0 TC 24 Z9 25 U1 1 U2 5 PU S P B ACADEMIC PUBLISHING BV PI LELYSTAD PA PLATINASTRAAT 33, 8211 AR LELYSTAD, NETHERLANDS SN 0921-2973 J9 LANDSCAPE ECOL JI Landsc. Ecol. PD APR PY 1992 VL 7 IS 1 BP 19 EP 26 DI 10.1007/BF02573954 PG 8 WC Ecology; Geography, Physical; Geosciences, Multidisciplinary SC Environmental Sciences & Ecology; Physical Geography; Geology GA HX809 UT WOS:A1992HX80900002 ER PT J AU ONEILL, RV GARDNER, RH TURNER, MG AF ONEILL, RV GARDNER, RH TURNER, MG TI A HIERARCHICAL NEUTRAL MODEL FOR LANDSCAPE ANALYSIS SO LANDSCAPE ECOLOGY LA English DT Article DE HIERARCHY THEORY; PERCOLATION THEORY; CURDLING AB Empirical studies have revealed scaled structure on a variety of landscapes. Understanding processes that produce these structures requires neutral models with hierarchical structure. The present study presents a method for generating random maps possessing a variety of hierarchical structures. The properties of these scaled landscapes are analyzed and compared to patterns on totally random, unstructured landscapes. Hierarchical structure permits percolation (i.e., continuous habitat spanning the landscape) under a greater variety of conditions than found on totally random landscapes. Habitat clusters on structured maps tend to have smaller perimeters. The clusters tend to be less clumped on sparsely occupied landscapes and more clumped in densely occupied conditions. Hierarchical structure changes the expected spatial properties of the landscape, indicating a strong need for this new generation of neutral models. RP ONEILL, RV (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831, USA. RI Turner, Monica/B-2099-2010 NR 0 TC 78 Z9 86 U1 3 U2 13 PU S P B ACADEMIC PUBLISHING BV PI LELYSTAD PA PLATINASTRAAT 33, 8211 AR LELYSTAD, NETHERLANDS SN 0921-2973 J9 LANDSCAPE ECOL JI Landsc. Ecol. PD APR PY 1992 VL 7 IS 1 BP 55 EP 61 DI 10.1007/BF02573957 PG 7 WC Ecology; Geography, Physical; Geosciences, Multidisciplinary SC Environmental Sciences & Ecology; Physical Geography; Geology GA HX809 UT WOS:A1992HX80900005 ER PT J AU ITON, LE TROUW, F BRUN, TO EPPERSON, JE WHITE, JW HENDERSON, SJ AF ITON, LE TROUW, F BRUN, TO EPPERSON, JE WHITE, JW HENDERSON, SJ TI SMALL-ANGLE NEUTRON-SCATTERING STUDIES OF THE TEMPLATE-MEDIATED CRYSTALLIZATION OF ZSM-5-TYPE ZEOLITE SO LANGMUIR LA English DT Letter AB Small-angle neutron scattering is a useful new approach to the study of zeolite crystallization from aluminosilicate gels and the action of template molecules. It has been applied to gels for synthesis of zeolite ZSM-5 using tetrapropylammonium ions as templates where the scattering length densities of the gel particles and their texture were determined by using contrast variation methods. Gels formulated from soluble silicate incorporate template molecules promptly into an amorphous "embryonic" structure, and crystallization ensues via a solid hydrogel transformation mechanism. Gels formulated from colloidal silica show different scattering behavior, and a liquid-phase transport mechanism is inferred. C1 ARGONNE NATL LAB,DIV PULSED NEUTRON SOURCE,ARGONNE,IL 60439. AUSTRALIAN NATL UNIV,RES SCH CHEM,CANBERRA,ACT 2600,AUSTRALIA. RP ITON, LE (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 8 TC 57 Z9 58 U1 3 U2 24 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0743-7463 J9 LANGMUIR JI Langmuir PD APR PY 1992 VL 8 IS 4 BP 1045 EP 1048 DI 10.1021/la00040a005 PG 4 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA HP262 UT WOS:A1992HP26200005 ER PT J AU SMITH, DH NWOSU, SN JOHNSON, GK LIM, KH AF SMITH, DH NWOSU, SN JOHNSON, GK LIM, KH TI MORPHOLOGIES OF EMULSIONS OF CONJUGATE PHASE PAIRS OF AMPHIPHILE OIL-WATER MICROEMULSION TIE TRIANGLES SO LANGMUIR LA English DT Article ID SYSTEMS; INVERSION AB Electrical conductivity measurements were made on emulsions formed, respectively, from the conjugate top-middle, top-bottom, and middle-bottom phase pairs that define the three sides of various nonionic amphiphile/oil/water "microemulsion" tie triangles. Effective-medium conductivity models and observations of creaming behavior were used to substantiate assignments of steady-state emulsion morphologies. The phase volume fractions at which morphology changes occurred were measured for both directions along each tie line, and the hysteresis was obtained as the difference between the volume fractions for the two directions. The results support the dispersion morphology diagram previously postulated, including the formation of mixtures of emulsions whose morphologies are the inverse of each other. C1 US DOE,MORGANTOWN ENERGY TECHNOL CTR,MORGANTOWN,WV 26507. NR 32 TC 20 Z9 20 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0743-7463 J9 LANGMUIR JI Langmuir PD APR PY 1992 VL 8 IS 4 BP 1076 EP 1081 DI 10.1021/la00040a011 PG 6 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA HP262 UT WOS:A1992HP26200011 ER PT J AU ERCK, RA ERDEMIR, A FENSKE, GR HSIEH, JH AF ERCK, RA ERDEMIR, A FENSKE, GR HSIEH, JH TI ION-BEAM-ASSISTED SURFACE MODIFICATIONS FOR FRICTION AND WEAR REDUCTION SO LUBRICATION ENGINEERING LA English DT Review ID THIN-FILMS; MODIFIED CERAMICS; DIAMOND FILMS; CARBON-FILMS; VAPOR-PHASE; DEPOSITION; IMPLANTATION; BOMBARDMENT; MICROSTRUCTURE; STRESS AB The use of techniques to modify the surfaces of engineering materials is expanding. The purpose of these modifications and treatments is to impart favorable properties, such as wear resistance and lubricity, to the surfaces, while retaining the strength or toughness of the bulk materials. High- and low-energy ion bombardment can be used to modify the structural and chemical properties of surfaces or applied coatings. Ion implantation has been used successfully for many years. Recently, other surface-modification techniques, including ion-beam mixing and ion-beam-assisted deposition, have attracted attention because they permit the application of highly adherent lubricious and wear-resistant films. In this paper, ion-beam techniques are described from the viewpoint of ion-surface interactions. Some recent results in promoting lubricity and wear resistance are reviewed, and some avenues for the engineering of tribological surfaces are presented. RP ERCK, RA (reprint author), ARGONNE NATL LAB,DIV MAT & COMPONENTS TECHNOL,ARGONNE,IL 60439, USA. NR 114 TC 2 Z9 2 U1 0 U2 1 PU SOC TRIBOLOGISTS & LUBRICATION ENGINEERS PI PARK RIDGE PA 838 BUSSE HIGHWAY, PARK RIDGE, IL 60068 SN 0024-7154 J9 LUBR ENG JI Lubric. Eng. PD APR PY 1992 VL 48 IS 4 BP 307 EP 317 PG 11 WC Engineering, Mechanical SC Engineering GA HP259 UT WOS:A1992HP25900008 ER PT J AU BRAMBLE, JH PASCIAK, JE AF BRAMBLE, JH PASCIAK, JE TI THE ANALYSIS OF SMOOTHERS FOR MULTIGRID ALGORITHMS SO MATHEMATICS OF COMPUTATION LA English DT Article ID VARIATIONAL-PROBLEMS; V-CYCLE; CONVERGENCE AB The purpose of this paper is to provide a general technique for defining and analyzing smoothing operators for use in multigrid algorithms. The smoothing operators considered are based on subspace decomposition and include point, line, and block versions of Jacobi and Gauss-Seidel iteration as well as generalizations. We shall show that these smoothers will be effective in multigrid algorithms provided that the subspace decomposition satisfies two simple conditions. In many applications, these conditions are trivial to verify. C1 BROOKHAVEN NATL LAB, DEPT APPL SCI, UPTON, NY 11973 USA. RP CORNELL UNIV, DEPT MATH, ITHACA, NY 14853 USA. NR 19 TC 44 Z9 47 U1 0 U2 0 PU AMER MATHEMATICAL SOC PI PROVIDENCE PA 201 CHARLES ST, PROVIDENCE, RI 02940-2213 USA SN 0025-5718 EI 1088-6842 J9 MATH COMPUT JI Math. Comput. PD APR PY 1992 VL 58 IS 198 BP 467 EP 488 DI 10.2307/2153197 PG 22 WC Mathematics, Applied SC Mathematics GA HM494 UT WOS:A1992HM49400002 ER PT J AU WILLIAMS, PT KRAUSS, RM VRANIZAN, KM ALBERS, JJ WOOD, PDS AF WILLIAMS, PT KRAUSS, RM VRANIZAN, KM ALBERS, JJ WOOD, PDS TI EFFECTS OF WEIGHT-LOSS BY EXERCISE AND BY DIET ON APOLIPOPROTEINS A-I AND A-II AND THE PARTICLE-SIZE DISTRIBUTION OF HIGH-DENSITY-LIPOPROTEINS IN MEN SO METABOLISM-CLINICAL AND EXPERIMENTAL LA English DT Article ID LONG-DISTANCE RUNNERS; SET-POINT THEORY; SERUM-LIPOPROTEINS; PROLONGED EXERCISE; SKELETAL-MUSCLE; LIPASE ACTIVITY; OVERWEIGHT MEN; ADIPOSE-TISSUE; PLASMA-LIPIDS; SEDENTARY MEN C1 STANFORD UNIV,MED CTR,SCH MED,STANFORD CTR RES DIS PREVENT,STANFORD,CA 94305. UNIV WASHINGTON,DEPT MED,NW LIPID RES LABS,SEATTLE,WA 98195. RP WILLIAMS, PT (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV RES MED & RADIAT BIOPHYS,BLDG 934,CYCLOTRON RD,BERKELEY,CA 94720, USA. FU NHLBI NIH HHS [HL-18574, P01 HL030086, HL-02183, HL-24462]; NIA NIH HHS [R03 AG032004-01A1, R03 AG032004] NR 38 TC 56 Z9 57 U1 0 U2 1 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0026-0495 J9 METABOLISM JI Metab.-Clin. Exp. PD APR PY 1992 VL 41 IS 4 BP 441 EP 449 DI 10.1016/0026-0495(92)90082-L PG 9 WC Endocrinology & Metabolism SC Endocrinology & Metabolism GA HM394 UT WOS:A1992HM39400017 PM 1556953 ER PT J AU MAZIASZ, PJ BRADLEY, S AF MAZIASZ, PJ BRADLEY, S TI STRUCTURE AND PROPERTIES OF FINE AND ULTRAFINE PARTICLES, SURFACES, AND INTERFACES - FOREWORD SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Editorial Material RP MAZIASZ, PJ (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0360-2133 J9 METALL TRANS A PD APR PY 1992 VL 23 IS 4 BP 1049 EP 1050 DI 10.1007/BF02665036 PG 2 WC Materials Science, Multidisciplinary SC Materials Science GA HL915 UT WOS:A1992HL91500001 ER PT J AU CRAWFORD, DC WAS, GS AF CRAWFORD, DC WAS, GS TI THE ROLE OF GRAIN-BOUNDARY MISORIENTATION IN INTERGRANULAR CRACKING OF NI-16CR-9FE IN 360-DEGREES-C ARGON AND HIGH-PURITY WATER SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article ID STRESS-CORROSION-CRACKING; ALLOY 600; MICROSTRUCTURE; POLYCRYSTALS; CAVITATION; BICRYSTALS; BEHAVIOR; PATTERNS; NICKEL; CREEP AB The effect of grain boundary misorientation on the intergranular cracking behavior of pure Ni-16Cr-9Fe was assessed by determining if low-angle boundaries (LABs) or coincident site lattice boundaries (CSLBs) are more crack resistant than general high-angle boundaries (GHABs) in argon and high-purity water. Cracking susceptibility of boundary types was determined using constant extension rate tensile tests (CERTs) in 360-degrees-C argon and in dearated, high-purity water. Annealed samples contained 12 to 20 pct CSLBs, while CSLB-enhanced samples contained 27 to 44 pct CSLBs; GHAB proportions varied accordingly. Cracked boundary fractions for CSLB-enhanced samples tested in either environment ranged from 0.01 to 0.08, while those for annealed samples ranged from 0.07 to 0.10, indicating that samples with increased proportions of CSLBs are more crack resistant. No LABs cracked in either environment. In annealed samples, the proportion of CSLBs that cracked in water was 6.7 pct compared to 1.5 pct in argon; the proportion of GHABs that cracked in water was 9.3 pct compared to 6.6 pct for argon. Thus, CSLBs are more crack resistant than GHABs in either environment, and both are more crack resistant in argon than in water. The higher amounts of cracking and the higher CSLB cracking susceptibility in high-purity water indicate the presence of an environmental effect on cracking behavior. The beneficial effect of LABs and CSLBs is likely due to the ability of these boundaries to induce slip in neighboring grains by either transmitting or absorbing and re-emitting lattice dislocations, thereby reducing grain boundary stresses and the propensity for crack initiation. The results indicate that control of grain boundary proportions can improve the intergranular stress corrosion cracking susceptibility of pure Ni-16Cr-9Fe. C1 UNIV MICHIGAN,NUCL ENGN,ANN ARBOR,MI 48109. RP CRAWFORD, DC (reprint author), ARGONNE NATL LAB,DIV FUELS & ENGN,IDAHO FALLS,ID 83403, USA. OI Crawford, Douglas/0000-0001-5639-7885 NR 52 TC 105 Z9 106 U1 1 U2 13 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0360-2133 J9 METALL TRANS A PD APR PY 1992 VL 23 IS 4 BP 1195 EP 1206 DI 10.1007/BF02665051 PG 12 WC Materials Science, Multidisciplinary SC Materials Science GA HL915 UT WOS:A1992HL91500016 ER PT J AU SUNWOO, AJ MORRIS, JW LUCEY, GK AF SUNWOO, AJ MORRIS, JW LUCEY, GK TI THE GROWTH OF CU-SN INTERMETALLICS AT A PRETINNED COPPER-SOLDER INTERFACE SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article ID 60SN-40PB SOLDER; JOINTS; CU3SN AB This article reports a comparative study of the formation and growth of intermetallic phases at the interface of Cu wetted with a thick solder joint or a thin, pretinned solder layer. The eta-phase (Cu6Sn5) forms when Cu is wet with eutectic solder at temperatures below 400-degrees-C. The intermetallic layer is essentially unaffected by aging at 70-degrees-C for as long as 13 weeks. On aging a eutectic joint at 170-degrees-C, the eta-phase intermetallic layer thickens and epsilon-phase (Cu3Sn) nucleates at the Cu/intermetallic interface and grows to a thickness comparable to that of the eta-phase, while a Pb-rich boundary layer forms in the solder. The aging behavior of a thin, pretinned eutectic layer is qualitatively different. At 170-degrees-C, the Sn in the eutectic is rapidly consumed to form eta-phase intermetallic, which converts to epsilon-phase. The residual Pb withdraws into isolated islands, and the solderability of the surface deteriorates. When the pretinned layer is Pb-rich (95Pb-5Sn), the Sn in the layer is also rapidly converted into eta-phase, in the form of dendrites penetrating from the intermetallic at the Cu interface and discrete precipitates in the bulk. However, the development of the intermetallic largely ceases when the Sn is consumed; epsilon-phase does not form, and the residual Pb remains as an essentially continuous layer, preserving the solderability of the sample. These observations are interpreted in light of the Cu-Sn and Pb-Sn phase diagrams, the temperature of initial wetting, and the relative diffusivities of Cu and Sn in the solder and intermetallic phases. C1 USA,HARRY DIAMOND LABS,PRODUCIBIL TECHNOL BRANCH,ADELPHI,MD 20783. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720. RP SUNWOO, AJ (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 29 TC 140 Z9 142 U1 0 U2 16 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0360-2133 J9 METALL TRANS A PD APR PY 1992 VL 23 IS 4 BP 1323 EP 1332 DI 10.1007/BF02665064 PG 10 WC Materials Science, Multidisciplinary SC Materials Science GA HL915 UT WOS:A1992HL91500029 ER PT J AU HOWIE, A LANZEROTTI, MY WANG, ZL AF HOWIE, A LANZEROTTI, MY WANG, ZL TI INCOHERENCE EFFECTS IN REFLECTION ELECTRON-MICROSCOPY SO MICROSCOPY MICROANALYSIS MICROSTRUCTURES LA English DT Article ID IMAGE-CONTRAST; SURFACE; STEPS AB The phase contrast imaging of surface steps in reflection electron microscopy is analysed. It is shown that the typical images are seriously affected by incoherence effects and that this arises, not from the strong inelastic scattering which is often present, but from the effective angular spread in the illumination which is frequently determined by the width of the Bragg reflection. C1 CORNELL UNIV,DEPT PHYS,ITHACA,NY 14853. OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RP HOWIE, A (reprint author), UNIV CAMBRIDGE,CAVENDISH LAB,MADINGLEY RD,CAMBRIDGE CB3 0HE,ENGLAND. RI Wang, Zhong Lin/E-2176-2011 OI Wang, Zhong Lin/0000-0002-5530-0380 NR 27 TC 2 Z9 2 U1 0 U2 0 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 1154-2799 J9 MICROSC MICROANAL M JI Microsc. Microanal. Microstruct. PD APR-JUN PY 1992 VL 3 IS 2-3 BP 233 EP 241 DI 10.1051/mmm:0199200302-3023300 PG 9 WC Microscopy; Spectroscopy SC Microscopy; Spectroscopy GA JX195 UT WOS:A1992JX19500016 ER PT J AU PICRAUX, T AF PICRAUX, T TI ESTABLISHING AN MRS ROLE IN NATIONAL SCIENCE POLICY SO MRS BULLETIN LA English DT Editorial Material RP PICRAUX, T (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0883-7694 J9 MRS BULL JI MRS Bull. PD APR PY 1992 VL 17 IS 4 BP 6 EP 6 PG 1 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA HP201 UT WOS:A1992HP20100001 ER PT J AU BENDER, MA PRESTON, RJ LEONARD, RC PYATT, BE GOOCH, PC AF BENDER, MA PRESTON, RJ LEONARD, RC PYATT, BE GOOCH, PC TI ON THE DISTRIBUTION OF SPONTANEOUS SCE IN HUMAN PERIPHERAL-BLOOD LYMPHOCYTES SO MUTATION RESEARCH LA English DT Article DE SPONTANEOUS SCE; SISTER-CHROMATID EXCHANGES, SPONTANEOUS; HUMAN LYMPHOCYTES; LYMPHOCYTES, HUMAN; DISTRIBUTIONS ID CHROMATID EXCHANGE FREQUENCIES; HUMAN-POPULATION SAMPLE; CHROMOSOMAL ABERRATION; SISTER C1 CHEM IND INST TOXICOL,RES TRIANGLE PK,NC 27709. ARCO CHEM CO,HLTH RISK MANAGEMENT,NEWTOWN SQ,PA 19073. OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37830. RP BENDER, MA (reprint author), BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973, USA. FU NIEHS NIH HHS [Y01-ES-20101, Y01-ES-20099] NR 11 TC 31 Z9 32 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-8262 J9 MUTAT RES PD APR PY 1992 VL 281 IS 4 BP 227 EP 232 DI 10.1016/0165-7992(92)90013-8 PG 6 WC Genetics & Heredity; Toxicology SC Genetics & Heredity; Toxicology GA HN036 UT WOS:A1992HN03600001 PM 1373214 ER PT J AU MARTINGALLARDO, A MCCOMBIE, WR GOCAYNE, JD FITZGERALD, MG WALLACE, S LEE, BMB LAMERDIN, J TRAPP, S KELLEY, JM LIU, LI DUBNICK, M JOHNSTONDOW, LA KERLAVAGE, AR DEJONG, P CARRANO, A FIELDS, C VENTER, JC AF MARTINGALLARDO, A MCCOMBIE, WR GOCAYNE, JD FITZGERALD, MG WALLACE, S LEE, BMB LAMERDIN, J TRAPP, S KELLEY, JM LIU, LI DUBNICK, M JOHNSTONDOW, LA KERLAVAGE, AR DEJONG, P CARRANO, A FIELDS, C VENTER, JC TI AUTOMATED DNA SEQUENCING AND ANALYSIS OF 106 KILOBASES FROM HUMAN CHROMOSOME-19Q13.3 SO NATURE GENETICS LA English DT Article ID REPAIR GENE ERCC-1; HUMAN GENOME; ALU FAMILY; CYCLIC-AMP; TRANSCRIPTION; PROTEIN; REGION; IDENTIFICATION; ORGANIZATION; LIBRARIES AB A total of 116,118 basepairs (bp) derived from three cosmids spanning the ERCC1 locus of human chromosome 19q13.3 have been sequenced with automated fluorescence-based sequencers and analysed by polymerase chain reaction amplification and computer methods. The assembled sequence forms two contigs totalling 105,831 bp, which contain a human fosB proto-oncogene, a gene encoding a protein phosphatase, two genes of unknown function and the previously-characterized ERCC1 DNA repair gene. This light band region has a high average density of 1.4 Alu repeats per kilobase. Human chromosome light bands could therefore contain up to 75,000 genes and 1.5 million Alu repeats. C1 NINCDS,RECEPTOR BIOCHEM & MOLEC BIOL SECT,BETHESDA,MD 20892. LAWRENCE LIVERMORE NATL LAB,CTR HUMAN GENOME,LIVERMORE,CA 94551. APPL BIOSYST INC,FOSTER CITY,CA 94404. RI Lee, Brian/F-8380-2013; OI Lee, Brian/0000-0002-0269-7812; Fields, Chris/0000-0002-4812-0744; McCombie, W. Richard/0000-0003-1899-0682 NR 50 TC 81 Z9 82 U1 0 U2 1 PU NATURE PUBLISHING CO PI NEW YORK PA 345 PARK AVE SOUTH, NEW YORK, NY 10010-1707 SN 1061-4036 J9 NAT GENET JI Nature Genet. PD APR PY 1992 VL 1 IS 1 BP 34 EP 39 DI 10.1038/ng0492-34 PG 6 WC Genetics & Heredity SC Genetics & Heredity GA JC978 UT WOS:A1992JC97800009 PM 1301997 ER PT J AU SETLOW, RB AF SETLOW, RB TI INTRODUCTION TO THE REVIEW OF THE AACR SPECIAL CONFERENCE ON CELLULAR-RESPONSES TO ENVIRONMENTAL DNA DAMAGE SO NEW BIOLOGIST LA English DT Editorial Material RP SETLOW, RB (reprint author), BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973, USA. NR 2 TC 0 Z9 0 U1 1 U2 1 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 1043-4674 J9 NEW BIOL PD APR PY 1992 VL 4 IS 4 BP 304 EP 305 PG 2 WC Biochemistry & Molecular Biology; Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics GA JR312 UT WOS:A1992JR31200006 ER PT J AU BRADY, MC SANDERS, TL AF BRADY, MC SANDERS, TL TI A VALIDATED METHODOLOGY FOR EVALUATING BURN-UP CREDIT IN SPENT FUEL CASKS SO NUCLEAR ENERGY-JOURNAL OF THE BRITISH NUCLEAR ENERGY SOCIETY LA English DT Article; Proceedings Paper CT INTERNATIONAL CONF ON NUCLEAR CRITICALITY SAFETY ( ICNC 91 ) CY SEP 09-13, 1991 CL CHRIST CHURCH, ENGLAND SP ORG ECON COOPERAT DEV, NUCL ENERGY AGCY, INT ATOM ENERGY AGCY, BRIT NUCL ENERGY SOC AB The concept of allowing reactivity credit for the transmuted state of spent fuel offers both economic and risk incentives. This Paper presents a general overview of the technical work being performed in support of the US Department of Energy (USDOE) programme to resolve issues related to the implementation of burn-up credit. An analysis methodology is presented along with information representing the validation of the method against available experimental data. The experimental data that are applicable to burn-up credit include chemical assay data for the validation of the isotopic prediction models, fresh fuel critical experiments for the validation of criticality calculations for various cask geometries, and reactor re-start critical data to validate criticality calculations with spent fuel. The methodology has been specifically developed to be simple and generally applicable, therefore giving rise to uncertainties or sensitivities which are identified and quantified in terms of a percent bias in k(eff). Implementation issues affecting licensing requirements and operational procedures are discussed briefly. RP BRADY, MC (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN, USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU BRITISH NUCLEAR ENERGY SOC PI WESTMINSTER, LONDON PA 1-7 GREAT GEORGE ST, WESTMINSTER, LONDON, ENGLAND SW1P 3AA SN 0140-4067 J9 NUCL ENERG-J BR NUCL JI Nucl. Energy-J. Br. Nucl. Energy Soc. PD APR PY 1992 VL 31 IS 2 BP 135 EP 142 PG 8 WC Nuclear Science & Technology SC Nuclear Science & Technology GA HQ896 UT WOS:A1992HQ89600008 ER PT J AU MCLAUGHLIN, TP AF MCLAUGHLIN, TP TI PROCESS CRITICALITY ACCIDENT LIKELIHOODS, CONSEQUENCES AND EMERGENCY PLANNING SO NUCLEAR ENERGY-JOURNAL OF THE BRITISH NUCLEAR ENERGY SOCIETY LA English DT Article; Proceedings Paper CT INTERNATIONAL CONF ON NUCLEAR CRITICALITY SAFETY ( ICNC 91 ) CY SEP 09-13, 1991 CL CHRIST CHURCH, ENGLAND SP ORG ECON COOPERAT DEV, NUCL ENERGY AGCY, INT ATOM ENERGY AGCY, BRIT NUCL ENERGY SOC AB Evaluation of criticality accident risks in the processing of significant quantities of fissile materials is both complex and subjective, largely due to the lack of accident statistics. Thus, complying with national and international standards and regulations which require an evaluation of the net benefit of a criticality accident alarm system, is also subjective. A review of guidance found in the literature on potential accident magnitudes is presented for different material forms and arrangements. Reasoned arguments are also presented concerning accident prevention and accident likelihoods for these material forms and arrangements. RP MCLAUGHLIN, TP (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87544, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU BRITISH NUCLEAR ENERGY SOC PI WESTMINSTER, LONDON PA 1-7 GREAT GEORGE ST, WESTMINSTER, LONDON, ENGLAND SW1P 3AA SN 0140-4067 J9 NUCL ENERG-J BR NUCL JI Nucl. Energy-J. Br. Nucl. Energy Soc. PD APR PY 1992 VL 31 IS 2 BP 143 EP 147 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA HQ896 UT WOS:A1992HQ89600009 ER PT J AU BARNETT, CS AF BARNETT, CS TI A PROBABILISTIC MODEL FOR ESTIMATING THE WAITING TIME UNTIL THE SIMULTANEOUS COLLAPSE OF 2 CONTINGENCIES SO NUCLEAR ENERGY-JOURNAL OF THE BRITISH NUCLEAR ENERGY SOCIETY LA English DT Article; Proceedings Paper CT INTERNATIONAL CONF ON NUCLEAR CRITICALITY SAFETY ( ICNC 91 ) CY SEP 09-13, 1991 CL CHRIST CHURCH, ENGLAND SP ORG ECON COOPERAT DEV, NUCL ENERGY AGCY, INT ATOM ENERGY AGCY, BRIT NUCL ENERGY SOC AB The double contingency principle (DCP) is widely applied to criticality safety practice in the United States. Most practitioners base their application of the principle on qualitative and intuitive assessments. The recent trend toward probabilistic safety assessments provides a motive for a search for a quantitative and probabilistic foundation for the DCP. A Markov model is tractable and leads to relatively simple results. The model yields estimates of mean time to simultaneous collapse of two contingencies, as functions of estimates of mean failure times and mean recovery times of two independent contingencies. The model is a tool that can be used to supplement the qualitative methods now used to assess the effectiveness of the DCP. RP BARNETT, CS (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BRITISH NUCLEAR ENERGY SOC PI WESTMINSTER, LONDON PA 1-7 GREAT GEORGE ST, WESTMINSTER, LONDON, ENGLAND SW1P 3AA SN 0140-4067 J9 NUCL ENERG-J BR NUCL JI Nucl. Energy-J. Br. Nucl. Energy Soc. PD APR PY 1992 VL 31 IS 2 BP 155 EP 157 PG 3 WC Nuclear Science & Technology SC Nuclear Science & Technology GA HQ896 UT WOS:A1992HQ89600011 ER PT J AU BASS, BR KEENEYWALKER, J CHANG, SJ PARROT, JS PUGH, CE HORNBERGER, K SCHWARTZ, CW AF BASS, BR KEENEYWALKER, J CHANG, SJ PARROT, JS PUGH, CE HORNBERGER, K SCHWARTZ, CW TI VISCOPLASTIC MODELING OF DYNAMIC FRACTURE EVENTS IN REACTOR PRESSURE-VESSEL STEELS SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article; Proceedings Paper CT 7TH INTERNATIONAL SEMINAR ON INELASTIC ANALYSIS, FRACTURE AND LIFE PREDICTION CY AUG, 1989 CL UNIV CALIFORNIA SANTA BARBARA, SANTA BARBARA, CA HO UNIV CALIFORNIA SANTA BARBARA ID THERMAL-SHOCK; CRACK-GROWTH; MECHANICS AB The Heavy-Section Steel Technology Program at the Oak Ridge National Laboratory under the sponsorship of the U.S. Nuclear RegulatorY Commission is continuing to improve the understanding of conditions that govern the initiation, rapid propagation, arrest, and ductile tearing of cracks in reactor pressure vessel steels. Nonlinear rate-dependent effects in crack run-arrest events in ductile materials are being investigated through the development and application of viscoplastic-dynamic finite-element analysis techniques. This paper describes a portion of these studies wherein various viscoplastic constitutive models. dynamic crack-propagation algorithms, and proposed nonlinear fracture criteria are being evaluated through their use in the general-purpose ADINA finite-element computer program. The predictive capabilities of the nonlinear techniques are being examined by comparing analytical and experimental results for the crack-arrest tests of large nonisothermal plate specimens. Values of the fracture parameters calculated by elastodynamic and viscoplastic dynamic techniques are compared to assess the impact of including viscoplastic effects in the computational models. Recent studies are described that examine the convergence problems associated with energy-based fracture parameters in viscoplastic-dynamic fracture applications. Alternative techniques that have potential for achieving convergent solutions for the fracture parameters in the context of viscoplastic-dynamic models are discussed. C1 KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH,W-7500 KARLSRUHE 1,GERMANY. UNIV MARYLAND,COLLEGE PK,MD 20742. RP BASS, BR (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 40 TC 0 Z9 0 U1 0 U2 1 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD APR PY 1992 VL 133 IS 3 BP 419 EP 431 DI 10.1016/0029-5493(92)90167-T PG 13 WC Nuclear Science & Technology SC Nuclear Science & Technology GA HW091 UT WOS:A1992HW09100011 ER PT J AU PONTER, ARS LECKIE, FA PUGH, CE BAYLAC, G AF PONTER, ARS LECKIE, FA PUGH, CE BAYLAC, G TI EXTENDED AND UPDATED SELECTED PAPERS FROM THE SMIRT-10 POST-CONFERENCE SEMINAR-5 ON INELASTIC ANALYSIS, FRACTURE AND LIFE PREDICTION AUGUST 1989, UNIVERSITY-OF-CALIFORNIA, SANTA-BARBARA, USA - PREFACE SO NUCLEAR ENGINEERING AND DESIGN LA English DT Editorial Material C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP PONTER, ARS (reprint author), UNIV LEICESTER,DEPT ENGN,LEICESTER LE1 7RH,ENGLAND. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD APR PY 1992 VL 133 IS 3 BP R1 EP R1 DI 10.1016/0029-5493(92)90157-Q PG 1 WC Nuclear Science & Technology SC Nuclear Science & Technology GA HW091 UT WOS:A1992HW09100001 ER PT J AU FISCH, NJ RAX, JM AF FISCH, NJ RAX, JM TI CURRENT DRIVE BY LOWER HYBRID WAVES IN THE PRESENCE OF ENERGETIC ALPHA-PARTICLES SO NUCLEAR FUSION LA English DT Article ID OHMIC-HEATING TRANSFORMER; TOKAMAK AB Many experiments have proved the effectiveness of lower hybrid waves for driving toroidal current in tokamaks. However, the use of these waves to provide all the current in a reactor is thought to be uncertain because it may happen that the waves do not penetrate into the centre of the more energetic reactor plasma and, if they do, the wave power may be absorbed by alpha particles rather than by electrons, The paper addresses mathematically the interaction between lower hybrid waves and alpha particles. C1 CEA FUS CONTROLEE, ASSOC EURATOM, CTR ETUD NUCL CADARACHE, F-13108 ST PAUL DURANCE, FRANCE. RP FISCH, NJ (reprint author), PRINCETON UNIV, PRINCETON PLASMA PHYS LAB, PRINCETON, NJ 08544 USA. NR 19 TC 46 Z9 46 U1 1 U2 3 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 APR PY 1992 VL 32 IS 4 BP 549 EP 556 DI 10.1088/0029-5515/32/4/I02 PG 8 WC Physics, Fluids & Plasmas SC Physics GA HR978 UT WOS:A1992HR97800002 ER PT J AU BOSCH, HS HALE, GM AF BOSCH, HS HALE, GM TI IMPROVED FORMULAS FOR FUSION CROSS-SECTIONS AND THERMAL REACTIVITIES SO NUCLEAR FUSION LA English DT Article ID MAXWELLIAN REACTIVITIES; LOW ENERGIES; BEAM AB For interpreting fusion rate measurements in present fusion experiments and predicting the fusion performance of future devices or of d-t experiments in present devices, it is important to know the fusion cross-sections as precisely as possible. Usually, it is not measured data that are used, but parametrizations of the cross-section as a function of the ion energy and parametrizations of the Maxwellian reactivity as a function of the ion temperature. Since the publication of the parametrizations now in use. new measurements have been made and evaluations of the measured data have been improved by applying R-matrix theory. The paper shows that the old parametrizations no longer adequately represent the experimental data and presents new parametrizations based on R-matrix calculations for fusion cross-sections and Maxwellian reactivities for the reactions D(d,n)He-3, D(d,p)T, T(d,n)He-4 and He-3(d,p)He-4. C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP BOSCH, HS (reprint author), MAX PLANCK INST PLASMA PHYS,EURATOM IPP ASSOC,W-8046 GARCHING,GERMANY. RI Bosch, Hans-Stephan/F-9527-2015 NR 99 TC 332 Z9 333 U1 4 U2 32 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 APR PY 1992 VL 32 IS 4 BP 611 EP 631 DI 10.1088/0029-5515/32/4/I07 PG 21 WC Physics, Fluids & Plasmas SC Physics GA HR978 UT WOS:A1992HR97800007 ER PT J AU BURGDORFER, J AF BURGDORFER, J TI DYNAMIC SCREENING AND WAKE EFFECTS ON ELECTRONIC EXCITATION IN ION SOLID AND ION SURFACE COLLISIONS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 14TH INTERNATIONAL CONF ON ATOMIC COLLISIONS IN SOLIDS ( ICACIS-14 ) CY JUL 28-AUG 02, 1991 CL UNIV SALFORD, SALFORD, ENGLAND SP UNIV SALFORD, CITY SALFORD, BRIT AEROSP, B & P ENGN, ELSEVIER PUBL, FARMER NORTON INT, MANCHESTER INT AIRPORT, MARKEM SYST, VACUUM 91 CONF EXHIBIT, VERTEC HO UNIV SALFORD ID HIGHLY CHARGED IONS; CONVOY ELECTRONS; CHANNELED IONS; EMISSION; PHYSICS; STATES AB The collective electronic response in a solid effectively alters ionic and atomic potentials giving rise to dynamic screening and to a "wake" of density fluctuations trailing ions as they propagate through the solid. The presence of dynamic screening modifies electronic excitation processes of projectiles in ion-solid collisions as compared to binary ion-atom collisions. We review recent theoretical and experimental studies directed al the search for and identification of signatures of dynamic screening and wake effects. Examples include the formation of excited projectile bound states under channeling conditions, radiative electron capture, the search for "wake-riding" electrons in antiproton-solid collisions, and the neutralization of highly charged ions near surfaces. C1 OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. RP BURGDORFER, J (reprint author), UNIV TENNESSEE, DEPT PHYS, KNOXVILLE, TN 37996 USA. NR 54 TC 25 Z9 25 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD APR PY 1992 VL 67 IS 1-4 BP 1 EP 10 DI 10.1016/0168-583X(92)95760-O PG 10 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HR308 UT WOS:A1992HR30800003 ER PT J AU SIGMUND, P AF SIGMUND, P TI SCATTERING AND STOPPING OF SWIFT DIATOMIC-MOLECULES UNDER COULOMB EXPLOSION SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 14TH INTERNATIONAL CONF ON ATOMIC COLLISIONS IN SOLIDS ( ICACIS-14 ) CY JUL 28-AUG 02, 1991 CL UNIV SALFORD, SALFORD, ENGLAND SP UNIV SALFORD, CITY SALFORD, BRIT AEROSP, B & P ENGN, ELSEVIER PUBL, FARMER NORTON INT, MANCHESTER INT AIRPORT, MARKEM SYST, VACUUM 91 CONF EXHIBIT, VERTEC HO UNIV SALFORD ID MULTIPLE-SCATTERING; THIN FOILS; IONS; H-2+ AB The scattering and stopping of the fragments of a fast diatomic molecule under Coulomb explosion has been analysed theoretically. The central assumption in the scheme is the dominance of Coulomb explosion, while electronic stopping (including wake forces) and elastic scattering are treated as perturbations. Charge exchange has been neglected. Coulomb images of penetration phenomena are heavily distorted. For small penetrated layer thicknesses, images appear contracted in the direction of the molecular axis, and expanded perpendicular to it. This distortion is described quantitatively by a linear transformation. General expressions have been derived for the effect of continuous and stochastic forces on the distribution of fragment velocities from Coulomb explosion (the "ring pattern"). Moreover, relations have been found that allow to scale velocity distributions valid in the absence of Coulomb explosion into distributions allowing for Coulomb explosion. Applications concern the shift in ring pattern due to electronic stopping, the lateral broadening due to multiple scattering, and the effect of zero-point motion on the Coulomb image of a molecule. C1 ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439. RP SIGMUND, P (reprint author), ODENSE UNIV,DEPT PHYS,DK-5230 ODENSE,DENMARK. RI Sigmund, Peter/B-1115-2012 OI Sigmund, Peter/0000-0002-2959-1305 NR 15 TC 17 Z9 17 U1 2 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD APR PY 1992 VL 67 IS 1-4 BP 11 EP 16 DI 10.1016/0168-583X(92)95761-F PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HR308 UT WOS:A1992HR30800004 ER PT J AU ZAJFMAN, D KANTER, EP GRABER, T VAGER, Z NAAMAN, R AF ZAJFMAN, D KANTER, EP GRABER, T VAGER, Z NAAMAN, R TI QUANTITATIVE MOLECULAR-SPECTROSCOPY USING COULOMB EXPLOSIONS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 14TH INTERNATIONAL CONF ON ATOMIC COLLISIONS IN SOLIDS ( ICACIS-14 ) CY JUL 28-AUG 02, 1991 CL UNIV SALFORD, SALFORD, ENGLAND SP UNIV SALFORD, CITY SALFORD, BRIT AEROSP, B & P ENGN, ELSEVIER PUBL, FARMER NORTON INT, MANCHESTER INT AIRPORT, MARKEM SYST, VACUUM 91 CONF EXHIBIT, VERTEC HO UNIV SALFORD ID BAYESIAN DECONVOLUTION; IONS; H2O+ AB A quantitative analysis of the influence of multiple scattering on fast molecules dissociating in solids is made using a Monte Carlo technique. The simulations allow the computation of asymptotic velocities of all of the fragments after Coulomb explosion including the effects of ion-solid interactions. Examples for deducing molecular structure using this method are given for two well-known molecular ions. C1 UNIV ILLINOIS,DEPT PHYS,CHICAGO,IL 60680. WEIZMANN INST SCI,DEPT NUCL PHYS,IL-76100 REHOVOT,ISRAEL. RP ZAJFMAN, D (reprint author), ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439, USA. NR 23 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD APR PY 1992 VL 67 IS 1-4 BP 22 EP 25 DI 10.1016/0168-583X(92)95763-H PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HR308 UT WOS:A1992HR30800006 ER PT J AU OVERBURY, SH MEYER, FW ROBINSON, MT AF OVERBURY, SH MEYER, FW ROBINSON, MT TI COMPUTER-SIMULATIONS OF RELAXATION PROCESSES IN SCATTERING OF MULTICHARGED IONS FROM METAL-SURFACES SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 14TH INTERNATIONAL CONF ON ATOMIC COLLISIONS IN SOLIDS ( ICACIS-14 ) CY JUL 28-AUG 02, 1991 CL UNIV SALFORD, SALFORD, ENGLAND SP UNIV SALFORD, CITY SALFORD, BRIT AEROSP, B & P ENGN, ELSEVIER PUBL, FARMER NORTON INT, MANCHESTER INT AIRPORT, MARKEM SYST, VACUUM 91 CONF EXHIBIT, VERTEC HO UNIV SALFORD ID ELECTRON-EMISSION; TUNGSTEN SURFACE; NEUTRALIZATION AB The dynamics of KLL Auger electron production resulting from the scattering of multi-charged, hydrogenlike ions from solid surfaces has been modeled by scattering simulations. The model is based upon two sequential steps involving L-shell filling followed by KLL Auger decay. Simulated results are found to adequately describe experimental Auger yields and their dependence upon scattering conditions. Depth distribution of the electron emission is discussed along with the dependence of the yields upon model parameters, incident azimuthal angle and the effects of crystal damage. RP OVERBURY, SH (reprint author), OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831, USA. RI Overbury, Steven/C-5108-2016 OI Overbury, Steven/0000-0002-5137-3961 NR 16 TC 3 Z9 3 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD APR PY 1992 VL 67 IS 1-4 BP 126 EP 131 DI 10.1016/0168-583X(92)95785-P PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HR308 UT WOS:A1992HR30800028 ER PT J AU KEMMLER, J BURGDORFER, J REINHOLD, CO AF KEMMLER, J BURGDORFER, J REINHOLD, CO TI HIGH L-STATE POPULATION IN O7+ PRODUCED IN ION SOLID COLLISIONS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 14TH INTERNATIONAL CONF ON ATOMIC COLLISIONS IN SOLIDS ( ICACIS-14 ) CY JUL 28-AUG 02, 1991 CL UNIV SALFORD, SALFORD, ENGLAND SP UNIV SALFORD, CITY SALFORD, BRIT AEROSP, B & P ENGN, ELSEVIER PUBL, FARMER NORTON INT, MANCHESTER INT AIRPORT, MARKEM SYST, VACUUM 91 CONF EXHIBIT, VERTEC HO UNIV SALFORD ID EXCITED-STATES; RYDBERG STATES; EXCITATION; OXYGEN; C+ AB The high l-state population of fast ions excited in ion-solid interactions is very different from l-state populations produced under single collision conditions. A study of the population dynamics of electronic excitation and transport within the framework of a classical transport theory for O2+ (2 MeV/u) ions traversing carbon foils shows good agreement with experimental results from delayed photon emission spectroscopy. We investigate the dependence of the characteristic exponent for the power-law decay of delayed Ly(alpha) and Ly(beta) radiation on the initial (n,l) distribution. From our simulations we find evidence that the very high l-state populations produced in ion-solid collisions are the consequence of a high I-state diffusion under the influence of multiple inelastic and elastic collisions in the bulk of the solid. C1 UNIV TENNESSEE,KNOXVILLE,TN 37916. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP KEMMLER, J (reprint author), CTR INTERDISCIPLINAIRE RECH SCI CIRIL,RUE CLAUDE BLOCH,BP 5133,F-14040 CAEN,FRANCE. OI Reinhold, Carlos/0000-0003-0100-4962 NR 18 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD APR PY 1992 VL 67 IS 1-4 BP 168 EP 171 DI 10.1016/0168-583X(92)95795-S PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HR308 UT WOS:A1992HR30800038 ER PT J AU SHARMA, RP REHN, LE BALDO, PM DOWNEY, JW KESTEL, B VANE, R KRAUSE, HF DITTNER, PF AF SHARMA, RP REHN, LE BALDO, PM DOWNEY, JW KESTEL, B VANE, R KRAUSE, HF DITTNER, PF TI ION CHANNELING INVESTIGATIONS IN HIGH-TC MATERIALS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 14TH INTERNATIONAL CONF ON ATOMIC COLLISIONS IN SOLIDS ( ICACIS-14 ) CY JUL 28-AUG 02, 1991 CL UNIV SALFORD, SALFORD, ENGLAND SP UNIV SALFORD, CITY SALFORD, BRIT AEROSP, B & P ENGN, ELSEVIER PUBL, FARMER NORTON INT, MANCHESTER INT AIRPORT, MARKEM SYST, VACUUM 91 CONF EXHIBIT, VERTEC HO UNIV SALFORD ID RADIATIVE ELECTRON-CAPTURE; YBA2CU3O7-DELTA AB A clear evidence of an abrupt change (approximately 0.015 angstrom) in the atomic displacement amplitude (u) of Cu atoms in Y/ErBa2Cu3O7-delta across the superconducting transition (T(c) = 92 K) is obtained. This variation is associated with T(c). Channeling scans across [301] and [331] directions have given diagnostics of inherent twinning in these crystals. Preliminary studies of the energy loss of 4 MeV protons and 6 MeV alpha-particles transmitted along the [001] direction of 7-10-mu-m YBa2Cu3O7-delta crystals show 3-4% less loss of energy as the sample temperature is taken from 100 to 30 K. In the same temperature range the REC X-rays produced by 80 MeV fully stripped F ions channeled along the [001] direction are seen to reduce by approximately 20% in intensity. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37830. RP SHARMA, RP (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 8 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD APR PY 1992 VL 67 IS 1-4 BP 194 EP 198 DI 10.1016/0168-583X(92)95800-7 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HR308 UT WOS:A1992HR30800043 ER PT J AU VANE, CR DITTNER, PF KRAUSE, HF DELCAMPO, JG JONES, NL VANEMMICHOVEN, PAZ BECHTHOLD, U DATZ, S AF VANE, CR DITTNER, PF KRAUSE, HF DELCAMPO, JG JONES, NL VANEMMICHOVEN, PAZ BECHTHOLD, U DATZ, S TI ENERGY-LOSS DEPENDENCE OF X-RAYS EMITTED BY TITANIUM IONS CHANNELED IN A THIN GOLD SINGLE-CRYSTAL SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 14TH INTERNATIONAL CONF ON ATOMIC COLLISIONS IN SOLIDS ( ICACIS-14 ) CY JUL 28-AUG 02, 1991 CL UNIV SALFORD, SALFORD, ENGLAND SP UNIV SALFORD, CITY SALFORD, BRIT AEROSP, B & P ENGN, ELSEVIER PUBL, FARMER NORTON INT, MANCHESTER INT AIRPORT, MARKEM SYST, VACUUM 91 CONF EXHIBIT, VERTEC HO UNIV SALFORD ID ELECTRON-IMPACT IONIZATION; CAPTURE AB X-rays generated by fully stripped titanium ions channeled along the [100] axis of a thin gold single crystal have been measured in coincidence with charge-changed ions as a function of ion energy loss. X-rays from the process of radiative electron capture are used to derive mean target electron densities for three values of mean energy loss. These densities are compared with densities calculated from a free-electron gas model for stopping. The results are used in a model calculation for Lyman series X-ray emission yields which includes effects of strong competition from secondary electron impact excitation and ionization of excited-state hydrogenic ions formed by electron capture in the crystal. RP VANE, CR (reprint author), OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831, USA. NR 17 TC 10 Z9 10 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD APR PY 1992 VL 67 IS 1-4 BP 256 EP 261 DI 10.1016/0168-583X(92)95813-7 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HR308 UT WOS:A1992HR30800056 ER PT J AU ROBINSON, MT AF ROBINSON, MT TI COMPUTER-SIMULATION STUDIES OF HIGH-ENERGY COLLISION CASCADES SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 14TH INTERNATIONAL CONF ON ATOMIC COLLISIONS IN SOLIDS ( ICACIS-14 ) CY JUL 28-AUG 02, 1991 CL UNIV SALFORD, SALFORD, ENGLAND SP UNIV SALFORD, CITY SALFORD, BRIT AEROSP, B & P ENGN, ELSEVIER PUBL, FARMER NORTON INT, MANCHESTER INT AIRPORT, MARKEM SYST, VACUUM 91 CONF EXHIBIT, VERTEC HO UNIV SALFORD ID SOLIDS AB A modified binary-collision-approximation algorithm allowing the proper order of the collisions in time was used to study cascades in Cu and Au at primary kinetic energies up to 100 keV. Nonlinearities were approximated by letting already-stopped cascade atoms become targets in later collisions, using an improved method of locating potential targets to extend the calculations to energies much higher than heretofore. Beside the effect of the approximate nonlinearity, the effect of thermal disorder in the targets was examined. Target redisplacements reduce the damage in Cu by 3% at most, but in Au they reduce it by amounts up to 20% at 100 keV. Thermal disorder is also important: by disrupting crystal effects, the damage is reduced significantly. RP ROBINSON, MT (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,POB 2008,OAK RIDGE,TN 37831, USA. NR 11 TC 38 Z9 38 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD APR PY 1992 VL 67 IS 1-4 BP 396 EP 400 DI 10.1016/0168-583X(92)95839-J PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HR308 UT WOS:A1992HR30800082 ER PT J AU ZHOU, B KISSEL, L PRATT, RH AF ZHOU, B KISSEL, L PRATT, RH TI SIMPLE COMPUTATIONAL SCHEMES FOR X-RAY ANOMALOUS SCATTERING FACTORS FOR IONS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article ID ANGLE RAYLEIGH-SCATTERING; ATOMS; ENERGIES; ELEMENTS AB Simple computational schemes to calculate the anomalous scattering factors g' and g" for ions, which utilize only the subshell photoionization cross sections of neutral atoms (modified only through adjustment in outer shell occupation number) and ionic edge positions, without any ionic photoionization cross sections, are proposed. The schemes give a way to estimate photon (Rayleigh) scattering from ions in the X-ray photon energy region without actually generating the large ionic photoeffect data base. A demonstration of the schemes is given for the case of neon ions. C1 SANDIA NATL LABS,DIV TEST PLANNING & DIAGNOST,ALBUQUERQUE,NM 87185. RP ZHOU, B (reprint author), UNIV PITTSBURGH,DEPT PHYS & ASTRON,PITTSBURGH,PA 15260, USA. NR 21 TC 16 Z9 16 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD APR PY 1992 VL 66 IS 3 BP 307 EP 312 DI 10.1016/0168-583X(92)95989-5 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HQ859 UT WOS:A1992HQ85900001 ER PT J AU KROPP, J AMBROSE, KR KNAPP, FF NISSEN, HP BIERSACK, HJ AF KROPP, J AMBROSE, KR KNAPP, FF NISSEN, HP BIERSACK, HJ TI INCORPORATION OF RADIOIODINATED IPPA AND BMIPP FATTY-ACID ANALOGS INTO COMPLEX LIPIDS FROM ISOLATED RAT HEARTS SO NUCLEAR MEDICINE AND BIOLOGY LA English DT Article ID PERFORMANCE LIQUID-CHROMATOGRAPHY; HEPTADECANOIC ACID; HYPERTENSIVE RATS; MASS DETECTOR; PHOSPHOLIPIDS; METABOLISM AB Heart lipids were extracted by the Folch technique from Langendorff-perfused rat hearts after administration of 15-(p-[I-131]iodophenyl)pentadecanoic acid and 15-(p-[I-125]iodophenyl)-3-R,S-methylpentadecanoic acid. Techniques utilizing successive high performance liquid chromatographic (HPLC) analyses have been developed for the evaluation of the uptake of the tracers into neutral lipids and phospholipids of the rat hearts. Phospholipids were separated on a SiO2 column eluted with a gradient of acetonitrile/water (97.5/2.5) and acetonitrile/water (85/15) followed by separation of the neutral lipids on a C-18 reversed phase column with a gradient consisting of acetonitrile and 2-propanol/hexane (60/40) containing 1 N H2SO4 (5-mu-L/100 mL). Both tracers show the incorporation into the expected major lipid classes. C1 UNIV BONN,DEPT DERMATOL,W-5300 BONN 1,GERMANY. OAK RIDGE NATL LAB,NUCL MED GRP,OAK RIDGE,TN 37831. RP KROPP, J (reprint author), UNIV BONN,DEPT NUCL MED,SIGMUND FREUD STR 25,W-5300 BONN 1,GERMANY. NR 24 TC 20 Z9 20 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0883-2897 J9 NUCL MED BIOL JI Nucl. Med. Biol. PD APR PY 1992 VL 19 IS 3 BP 283 EP 288 PG 6 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA HL213 UT WOS:A1992HL21300006 ER PT J AU MUHLHEIM, MD AF MUHLHEIM, MD TI 19TH WATER-REACTOR SAFETY INFORMATION MEETING SO NUCLEAR SAFETY LA English DT Article AB This article is a brief review of the Nineteenth Water Reactor Safety Information Meeting, one of an ongoing series of meetings sponsored by the U.S. Nuclear Regulatory Commission (NRC), Office of Nuclear Regulatory Research. The purpose of these meetings is to give the nuclear safety community up-to-date information on NRC-sponsored and other research in the nuclear power-reactor safety field. A table lists all the papers and authors, and some of the highlights of the meeting are summarized. RP MUHLHEIM, MD (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37830, USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0029-5604 J9 NUCL SAFETY JI Nucl. Saf. PD APR-JUN PY 1992 VL 33 IS 2 BP 155 EP 169 PG 15 WC Environmental Sciences; Nuclear Science & Technology SC Environmental Sciences & Ecology; Nuclear Science & Technology GA KD775 UT WOS:A1992KD77500001 ER PT J AU ECKERMAN, KF LEGGETT, RW AF ECKERMAN, KF LEGGETT, RW TI REVIEW OF NCRP-108 - CONCEPTUAL BASIS FOR CALCULATIONS OF ABSORBED-DOSE DISTRIBUTIONS SO NUCLEAR SAFETY LA English DT Editorial Material RP ECKERMAN, KF (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37830, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0029-5604 J9 NUCL SAFETY JI Nucl. Saf. PD APR-JUN PY 1992 VL 33 IS 2 BP 219 EP 219 PG 1 WC Environmental Sciences; Nuclear Science & Technology SC Environmental Sciences & Ecology; Nuclear Science & Technology GA KD775 UT WOS:A1992KD77500007 ER PT J AU MUHLHEIM, MD SILVER, EG AF MUHLHEIM, MD SILVER, EG TI ACTIVITIES RELATED TO WASTE AND SPENT FUEL-MANAGEMENT SO NUCLEAR SAFETY LA English DT Article RP MUHLHEIM, MD (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37830, USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0029-5604 J9 NUCL SAFETY JI Nucl. Saf. PD APR-JUN PY 1992 VL 33 IS 2 BP 229 EP 236 PG 8 WC Environmental Sciences; Nuclear Science & Technology SC Environmental Sciences & Ecology; Nuclear Science & Technology GA KD775 UT WOS:A1992KD77500009 ER PT J AU BERTING, FM BAILEY, WJ AF BERTING, FM BAILEY, WJ TI SUMMARY OF FUEL PERFORMANCE ANNUAL-REPORT FOR 1989 SO NUCLEAR SAFETY LA English DT Article AB This article summarizes NUREG/CR-3950, (PNL-5210, Vol. 7), Fuel Performance Annual Report for 1989, published in June 1992. This twelfth annual report provides a summary description of fuel performance in domestic commercial nuclear power plants and an indication of trends during 1989. Brief summaries of fuel design changes, fuel surveillance programs,fuel operating experience,fuel problems, and high-burnup fuel experience are provided. References are included for additional information. RP BERTING, FM (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. NR 82 TC 1 Z9 1 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0029-5604 J9 NUCL SAFETY JI Nucl. Saf. PD APR-JUN PY 1992 VL 33 IS 2 BP 237 EP 261 PG 25 WC Environmental Sciences; Nuclear Science & Technology SC Environmental Sciences & Ecology; Nuclear Science & Technology GA KD775 UT WOS:A1992KD77500010 ER PT J AU CLETCHER, JW AF CLETCHER, JW TI REACTOR SHUTDOWN EXPERIENCE SO NUCLEAR SAFETY LA English DT Article RP CLETCHER, JW (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37830, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0029-5604 J9 NUCL SAFETY JI Nucl. Saf. PD APR-JUN PY 1992 VL 33 IS 2 BP 262 EP 264 PG 3 WC Environmental Sciences; Nuclear Science & Technology SC Environmental Sciences & Ecology; Nuclear Science & Technology GA KD775 UT WOS:A1992KD77500011 ER PT J AU MURPHY, GA AF MURPHY, GA TI SELECTED SAFETY-RELATED EVENTS SO NUCLEAR SAFETY LA English DT Article RP MURPHY, GA (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37830, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0029-5604 J9 NUCL SAFETY JI Nucl. Saf. PD APR-JUN PY 1992 VL 33 IS 2 BP 265 EP 268 PG 4 WC Environmental Sciences; Nuclear Science & Technology SC Environmental Sciences & Ecology; Nuclear Science & Technology GA KD775 UT WOS:A1992KD77500012 ER PT J AU MUHLHEIM, MD SILVER, EG AF MUHLHEIM, MD SILVER, EG TI OPERATING UNITED-STATES POWER-REACTORS SO NUCLEAR SAFETY LA English DT Article RP MUHLHEIM, MD (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37830, USA. NR 12 TC 0 Z9 0 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0029-5604 J9 NUCL SAFETY JI Nucl. Saf. PD APR-JUN PY 1992 VL 33 IS 2 BP 269 EP 289 PG 21 WC Environmental Sciences; Nuclear Science & Technology SC Environmental Sciences & Ecology; Nuclear Science & Technology GA KD775 UT WOS:A1992KD77500013 ER PT J AU HARKER, YD ANDERL, RA BECKER, GK MILLER, LG AF HARKER, YD ANDERL, RA BECKER, GK MILLER, LG TI SPECTRAL CHARACTERIZATION OF THE EPITHERMAL NEUTRON BEAM AT THE BROOKHAVEN MEDICAL-RESEARCH REACTOR SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article AB Neutron spectrum measurements are performed on the aluminum-oxide-filtered neutron beam at the Brookhaven Medical Research Reactor (BMRR). Two independent measurement techniques are used in the spectrum characterization: (a) foil activation spectrometry and (b) proton-recoil spectrometry. Activation foil assemblies are irradiated at the exit port of the beam facility. Dominant resonances in selected activation reactions are used to measure the epithermal neutron spectrum. The intermediate and fast energy ranges of the neutron spectrum are measured by threshold reactions and the B-10-filtered U-235 fission reaction. Neutron spectral data are derived from the activation data by two approaches: (a) an analysis that yields neutron flux values at the energies of the dominant or primary resonances in the epithermal activation reactions and (b) an analysis that utilizes all the activation data simultaneously in a spectrum unfolding process using the FERRET data adjustment code. Hydrogen-filled proton-recoil proportional chambers are used at the beam port exit to acquire data of a higher energy resolution than that obtainable through foil activation techniques. These measurements are made to determine if structure in the aluminum scattering cross section would produce significant structure in the filtered spectrum in the fast neutron region. RP HARKER, YD (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 11 TC 16 Z9 16 U1 0 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD APR PY 1992 VL 110 IS 4 BP 355 EP 368 PG 14 WC Nuclear Science & Technology SC Nuclear Science & Technology GA HP316 UT WOS:A1992HP31600005 ER PT J AU ANDERSON, KR STUBBINS, JF GARNER, FA AF ANDERSON, KR STUBBINS, JF GARNER, FA TI THE PROPERTIES OF SELECTED SPINODALLY STRENGTHENED COPPER-ALLOYS FOLLOWING HIGH-TEMPERATURE NEUTRON-IRRADIATION SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article ID DAMAGE; EVOLUTION; DEFECTS AB Three spinodally strengthened copper alloys were irradiated with fast neutrons to 34 displacements per atom (dpa) at 414-degrees-C, 50 dpa at 411-degrees-C, and 32 dpa at 529-degrees-C in order to assess their suitability for high-temperature service in neutron environments. Density, electrical conductivity, tensile property, and fracture behavior changes were determined with emphasis on the microstructural reasons for the changes observed. These spinodally strengthened alloys were found to exhibit improved properties following irradiation, and they show merit for use in high-temperature neutron environments, although their low initial conductivity may be a limitation. The results are compared to those of high-purity, unalloyed copper. C1 UNIV ILLINOIS, DEPT NUCL ENGN, URBANA, IL 61801 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 44 TC 4 Z9 4 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD APR PY 1992 VL 110 IS 4 BP 394 EP 407 PG 14 WC Nuclear Science & Technology SC Nuclear Science & Technology GA HP316 UT WOS:A1992HP31600009 ER PT J AU RHODES, EA BAUER, TH STANFORD, GS REGIS, JP DICKERMAN, CE AF RHODES, EA BAUER, TH STANFORD, GS REGIS, JP DICKERMAN, CE TI FUEL MOTION IN OVERPOWER TESTS OF METALLIC INTEGRAL FAST-REACTOR FUEL SO NUCLEAR TECHNOLOGY LA English DT Article DE FAST NEUTRON HODOSCOPE; TRANSIENT REACTOR TEST FACILITY; FUEL MOTION ID TREAT AB Results from hodoscope data analyses are presented for transient overpower (TOP) tests M5, M6, and M7 at the Transient Reactor Test Facility, with emphasis on transient feedback mechanisms, including prefailure expansion at the tops of the fuel pins, subsequent dispersive axial fuel motion, and losses in relative worth of the fuel pins during the tests. Tests M5 and M6 were the first TOP tests of margin to cladding breach and prefailure elongation of D9-clad ternary (U-Pu-Zr) integral fast reactor-type fuel. Test M7 extended these results to high-burnup fuel and also initiated transient testing of HT-9-clad binary (U-Zr) Fast Flux Test Facility driver fuel. Results show significant prefailure negative reactivity feedback and strongly negative feedback from fuel driven to failure. RP RHODES, EA (reprint author), ARGONNE NATL LAB,DIV REACTOR ENGN,EXPTL PHYS SECT,ARGONNE,IL 60439, USA. NR 5 TC 1 Z9 1 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD APR PY 1992 VL 98 IS 1 BP 91 EP 99 PG 9 WC Nuclear Science & Technology SC Nuclear Science & Technology GA HJ983 UT WOS:A1992HJ98300008 ER PT J AU GROSS, KC STRAIN, RV AF GROSS, KC STRAIN, RV TI SINUSOIDAL SOURCE PERTURBATION EXPERIMENTS WITH A BREACHED FUEL SUBASSEMBLY IN THE EXPERIMENTAL BREEDER REACTOR II SO NUCLEAR TECHNOLOGY LA English DT Article DE FAILED FUEL; SPECTRAL ANALYSIS; FISSION PRODUCTS AB A bifrequency reactivity oscillation procedure (ROP) was devised at the Experimental Breeder Reactor II (EBR-II) to be used as a diagnostic tool for characterizating mechanisms responsible for the release and transport of short-lived fission products from the surface of exposed fuel. A series of ROP experiments was conducted during operation at 74% of full power with a breached fuel pin in the core. Detailed analyses of the results using bivariate spectral decomposition and cross-correlation techniques are presented. Comparison of the results of these experiments with those obtained from earlier tests with an unclad fuel source provides conclusive evidence that all nonrecoil fission product release phenomena originate from mechanisms acting inside the breached element itself. Implications of the findings from this study in terms of the goals of high-sensitivity fission product surveillance are discussed. C1 ARGONNE NATL LAB,DIV FUELS & ENGN,EXPT ANAL GRP,ARGONNE,IL 60439. RP GROSS, KC (reprint author), ARGONNE NATL LAB,REACTOR SIMULAT & CONTROLS LAB,ARGONNE,IL 60439, USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD APR PY 1992 VL 98 IS 1 BP 113 EP 123 PG 11 WC Nuclear Science & Technology SC Nuclear Science & Technology GA HJ983 UT WOS:A1992HJ98300010 ER PT J AU DOERNER, RC BAUER, TH MORMAN, JA HOLLAND, JW AF DOERNER, RC BAUER, TH MORMAN, JA HOLLAND, JW TI FEATURES OF POSTFAILURE FUEL BEHAVIOR IN TRANSIENT OVERPOWER AND TRANSIENT UNDERCOOLED OVERPOWER TESTS IN THE TRANSIENT REACTOR TEST FACILITY SO NUCLEAR TECHNOLOGY LA English DT Article DE PROTOTYPE FAST REACTOR TRANSIENT REACTOR TEST; LIQUID-METAL REACTOR ACCIDENT SIMULATIONS; POSTFAILURE FUEL MOTIONS AB Prototypic oxide fuel was subjected to simulated, fast reactor severe accident conditions in a series of in-pile tests in the Transient Reactor Test Facility reactor. Seven experiments were performed on fresh and previously irradiated oxide fuel pins under transient overpower and transient undercooled/overpower accident conditions. For each of the tests, fuel motions were observed by the hodoscope. Hodoscope data are correlated with coolant flow, pressure, and temperature data recorded by the loop instrumentation. Data were analyzed from the onset of initial failure to a final mass distribution at the end of the test. Results of these analyses are compared to pre- and posttest accident calculations and to posttest metallographic examinations and computed tomographic reconstructions from neutron radiographs. RP DOERNER, RC (reprint author), ARGONNE NATL LAB,TRANSIENT REACTOR TEST FACIL,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 13 TC 2 Z9 2 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD APR PY 1992 VL 98 IS 1 BP 124 EP 136 PG 13 WC Nuclear Science & Technology SC Nuclear Science & Technology GA HJ983 UT WOS:A1992HJ98300011 ER PT J AU GARTEN, CT TAYLOR, GE AF GARTEN, CT TAYLOR, GE TI FOLIAR DELTA C-13 WITHIN A TEMPERATURE DECIDUOUS FOREST - SPATIAL, TEMPORAL, AND SPECIES SOURCES OF VARIATION SO OECOLOGIA LA English DT Article DE STABLE ISOTOPES; DECIDUOUS FORESTS; C-13 C-12 RATIOS; TOPOGRAPHIC VARIATION; WATER USE EFFICIENCY ID WATER-USE EFFICIENCY; LEAF CARBON ISOTOPE; LEAVES; PHOTOSYNTHESIS; DISCRIMINATION; STRATIFICATION; DIOXIDE; CANOPY; PLANTS; RATIOS AB Foliar C-13-abundance (delta-C-13) was analyzed in the dominant trees of a temperate deciduous forest in east Tennessee (Walker Branch Watershed) to investigate the variation in foliar delta-C-13 as a function of time (within-year and between years), space (canopy height, watershed topography and habitat) and species (deciduous and coniferous taxa). Various hypotheses were tested by analyzing (i) samples collected from the field during the growing season and (ii) foliar tissues maintained in an archived collection. The delta-C-13-value for leaves from the tops of trees was 2 to 3 parts per thousand more positive than for leaves sampled at lower heights in the canopy. Quercus prinus leaves sampled just prior to autumn leaf fall had significantly more negative delta-C-13-values than those sampled during midsummer. On the more xeric ridges, needles of Pinus spp. had more positive delta-C-13-values than leaves from deciduous species. Foliar delta-C-13-values differed significantly as a function of topography. Deciduous leaves from xeric sites (ridges and slopes) had more positive delta-C-13-values than those from mesic (riparian and cove) environments. On the more xeric sites, foliar delta-C-13 was significantly more positive in 1988 (a dry year) relative to that in 1989 (a year with above-normal precipitation). In contrast, leaf delta-C-13 in trees from mesic valley bottoms did not differ significantly among years with disparate precipitation. Patterns in foliar delta-C-13 indicated a higher ratio of net CO2 assimilation to transpiration (A/E) for trees in more xeric versus mesic habitats, and for trees in xeric habitats during years of drought versus years of normal precipitation. However, A/E (units of mmol CO2 fixed/mol H2O transpired) calculated on the basis of delta-C-13-values for leaves from the more xeric sites was higher in a wet year (6.6 +/- 1.2) versus a dry year (3.4 +/- 0.4). This difference was attributed to higher transpiration (and therefore lower A/E) in the year with lower relative humidity and higher average daily temperature. The calculated A/E values for the forest in 1988-89, based on delta-C-13, were within +/- 55% of estimates made over a 17 day period at this site in 1984 using micrometeorological methods. C1 UNIV NEVADA,CTR BIOL SCI,DESERT RES INST,RENO,NV 89506. UNIV NEVADA,DEPT ENVIRONM & RESOURCE SCI,RENO,NV 89506. RP GARTEN, CT (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,OAK RIDGE,TN 37830, USA. NR 19 TC 151 Z9 173 U1 2 U2 39 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0029-8549 J9 OECOLOGIA JI Oecologia PD APR PY 1992 VL 90 IS 1 BP 1 EP 7 DI 10.1007/BF00317801 PG 7 WC Ecology SC Environmental Sciences & Ecology GA HP012 UT WOS:A1992HP01200001 PM 28312263 ER PT J AU KRAUS, HG AF KRAUS, HG TI CHARACTERISTIC PATHLENGTH FRESNEL NUMBER EQUATIONS AND IDEAL LENS WAVE-FRONT KIRCHHOFF FORMULATION - ANALYSIS OF FOCUSED GAUSSIAN-BEAM DIFFRACTION FIELDS SO OPTICS AND LASER TECHNOLOGY LA English DT Article DE FRESNEL NUMBERS; GAUSSIAN BEAMS; KIRCHHOFF DIFFRACTION FORMULATION; CIRCULAR APERTURES; FOCAL SHIFT ID LASER-BEAMS; FOCAL SHIFT; APERTURE AB The characteristic optical pathlength Fresnel number equation for a paraxial lens Gaussian laser beam diffracted and spherically focused by an 'ideal' circular is derived. The maximum inside and outside pathlength Fresnel numbers are quantified. The maximum outside pathlength Fresnel number, simplified via the paraxial approximation, is shown to be equal to the classical focal Fresnel number of the lens-aperture combination. A unique Kirchhoff diffraction integral formulation of this configuration is derived, and calculations show that the diffraction fields for a circular-aperture-truncated focused Gaussian beam are identical in characteristic shape to the same but non-focused diffraction fields, as long as significant focal shift effects are not present. Example applications of the optical pathlength Fresnel number equation are given. RP KRAUS, HG (reprint author), IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 20 TC 1 Z9 1 U1 0 U2 0 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0030-3992 J9 OPT LASER TECHNOL JI Opt. Laser Technol. PD APR PY 1992 VL 24 IS 2 BP 77 EP 87 DI 10.1016/0030-3992(92)90039-5 PG 11 WC Optics; Physics, Applied SC Optics; Physics GA HZ699 UT WOS:A1992HZ69900004 ER PT J AU PERRY, MD DARROW, C COVERDALE, C CRANE, JK AF PERRY, MD DARROW, C COVERDALE, C CRANE, JK TI MEASUREMENT OF THE LOCAL ELECTRON-DENSITY BY MEANS OF STIMULATED RAMAN-SCATTERING IN A LASER-PRODUCED GAS-JET PLASMA SO OPTICS LETTERS LA English DT Article AB By measuring the spectrum of the backscattered light from a short-pulse laser-produced plasma in a gas jet, a direct and highly accurate measurement of the local electron density can be obtained. The measurement is based on the density-dependent spectral shift of the backscattered Raman wave. RP PERRY, MD (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,POB 808,L-493,LIVERMORE,CA 94550, USA. NR 17 TC 35 Z9 35 U1 0 U2 4 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD APR 1 PY 1992 VL 17 IS 7 BP 523 EP 525 DI 10.1364/OL.17.000523 PG 3 WC Optics SC Optics GA HK744 UT WOS:A1992HK74400021 PM 19794546 ER PT J AU WORLEY, PH AF WORLEY, PH TI THE EFFECT OF MULTIPROCESSOR RADIUS ON SCALING SO PARALLEL COMPUTING LA English DT Article DE ALGORITHM-INDEPENDENT BOUNDS; COMMUNICATION COST; MASSIVELY PARALLEL COMPUTATION; MULTIPROCESSOR SCALING; MULTIPROCESSOR RADIUS; PARALLEL EXECUTION TIME; PROBLEM SCALING ID ARCHITECTURES; ALGORITHMS; COMPUTATIONS; COMPLEXITY; SYSTEMS AB In earlier work, it was established that, for a large class of linear partial differential equations (PDEs), increasing the problem size necessarily increases the amount of data that is needed to approximate the solution of some scalar value in the solution field. In consequence, increasing the problem size of these PDEs increases the execution time, independent of the algorithm, the number of processors, and the interprocessor communication network used to solve the problem. In this paper, the analysis is extended to take into account the effect of the radius of the interprocessor communication network on the growth in the execution time. It is shown that the increasing amount of data also contributes to an increase in the time spent in interprocessor communication in optimal parallel algorithms for the problem. In particular, for any physically-realizable multiprocessor, the time spent on interprocessor communication will be the dominant constraint on the performance of optimal algorithms when the problem and multiprocessor sizes are large. RP WORLEY, PH (reprint author), OAK RIDGE NATL LAB,MATH SCI SECT,POB 2008,BLDG 6012,OAK RIDGE,TN 37831, USA. NR 21 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-8191 J9 PARALLEL COMPUT JI Parallel Comput. PD APR PY 1992 VL 18 IS 4 BP 361 EP 376 DI 10.1016/0167-8191(92)90133-R PG 16 WC Computer Science, Theory & Methods SC Computer Science GA HV429 UT WOS:A1992HV42900001 ER PT J AU THOMPSON, CP COWELL, WR LEAF, GK AF THOMPSON, CP COWELL, WR LEAF, GK TI ON THE PARALLELIZATION OF AN ADAPTIVE MULTIGRID ALGORITHM FOR A CLASS OF FLOW PROBLEMS SO PARALLEL COMPUTING LA English DT Article DE PARALLEL MULTIGRID; ADAPTIVE GRIDDING; INCOMPRESSIBLE NAVIER-STOKES EQUATIONS; GLOBAL SHARED MEMORY; LOAD BALANCING; PARALLEL PERFORMANCE SIMULATION AND MEASUREMENT AB We describe the parallelization of an adaptive multigrid code that solves the steady, laminar, incompressible Navier-Stokes equations. Parallelism was achieved as loop concurrency on a shared-memory multiprocessor. Analysis of the code for parallelism, in particular the location of data dependencies that inhibit parallelism, was aided by the use of the software tool VecPar_77(R). We present speedup results obtained on a Sequent Symmetry(R). We describe the scalability of the algorithm by presenting results from an execution simulator, analyzed using a model of loop-based, shared-memory parallel computation. C1 ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439. RP THOMPSON, CP (reprint author), UKAEA,PETR SERV,HARWELL LAB,HARWELL OX11 0RA,BERKS,ENGLAND. OI Thompson, Christopher/0000-0003-1939-6749 NR 10 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-8191 J9 PARALLEL COMPUT JI Parallel Comput. PD APR PY 1992 VL 18 IS 4 BP 449 EP 466 DI 10.1016/0167-8191(92)90140-3 PG 18 WC Computer Science, Theory & Methods SC Computer Science GA HV429 UT WOS:A1992HV42900008 ER PT J AU GUPTA, L UPADHYE, AM DENBY, B AMENDOLIA, SR GRIECO, G AF GUPTA, L UPADHYE, AM DENBY, B AMENDOLIA, SR GRIECO, G TI NEURAL NETWORK TRIGGER ALGORITHMS FOR HEAVY QUARK EVENT SELECTION IN A FIXED TARGET HIGH-ENERGY PHYSICS EXPERIMENT SO PATTERN RECOGNITION LA English DT Article DE NEURAL NETWORKS; HEAVY QUARK PHYSICS; FIXED TARGET EXPERIMENT; TRIGGER ALGORITHMS ID SHAPE CLASSIFICATION; MOMENT INVARIANTS; DYNAMIC ALIGNMENT; RECOGNITION AB The study of particles containing heavy quarks is currently a major topic in high energy physics. In this paper, neural net trigger algorithms are developed to distinghish heavy quark (signal) events from light quark (background) events in a fixed target experiment. The event tracks which are parametrized by the impact parameter D and the angle-PHI of the track with respect to the beam line, vary in number and in position in the PHI-D plane. An invariant second-order moment feature set and an invariant D-sequence representation are derived to characterize the signal and background event track patterns in the PHI-D plane. A three-layer perceptron is trained to classify events as signal/background via the moments and D-sequences. A nearest neighbor classifier is also developed to serve as a benchmark for comparing the performance of the neural net triggers. Results indicate that the selected moment feature set and the D-sequence representation contain essential signal/background discriminatory information. The results also show that the neural network trigger algorithms are superior to the nearest neighbor trigger algorithms. A very high discrimination against background events and a very high efficiency for selecting signal events is obtained with the D-sequence neural net trigger algorithm. C1 FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV SASSARI,I-07100 SASSARI,ITALY. IST NAZL FIS NUCL,PISA,ITALY. RP GUPTA, L (reprint author), SO ILLINOIS UNIV,DEPT ELECT ENGN,CARBONDALE,IL 62901, USA. NR 21 TC 3 Z9 3 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0031-3203 J9 PATTERN RECOGN JI Pattern Recognit. PD APR PY 1992 VL 25 IS 4 BP 413 EP 421 DI 10.1016/0031-3203(92)90089-2 PG 9 WC Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic SC Computer Science; Engineering GA HU493 UT WOS:A1992HU49300006 ER PT J AU CAI, ZX ZHU, YM WELCH, DO AF CAI, ZX ZHU, YM WELCH, DO TI OXYGEN ORDERING AND FE CONFIGURATION IN REDUCED AND RE-OXIDIZED YBA2CU3-XFEXOY SO PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES LA English DT Article ID MONTE-CARLO; YBA2CU3O7-DELTA; SUPERCONDUCTIVITY; PHASE AB Bulk samples of YBa2Cu3-xFexO7-delta (x = 0.09 and x = 0.36) were produced by a conventional sintering method. Transmission electron microscopy studies show that after reduction and subsequent low-temperature re-oxidation of the sintered sample, the orthorhombicity of the sample increases drastically. The strongly 'tweed' morphology changed into a strongly twinned one with weak tweed contrast. A two-dimensional lattice-gas model is established to study the effect of reduction and subsequent low-temperature re-oxidation on the oxygen ordering and Fe distribution in these systems. Monto Carlo simulations using Kawasaki dynamics are performed to investigate the Fe cluster formation and its effect on oxygen ordering for various Fe concentrations. The results are in very good agreement with experiments, suggesting that the structure change during the reduction and re-oxidation process can be explained by Fe clustering in CuO plane. RP CAI, ZX (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973, USA. NR 11 TC 2 Z9 2 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0141-8610 J9 PHILOS MAG A JI Philos. Mag. A-Phys. Condens. Matter Struct. Defect Mech. Prop. PD APR PY 1992 VL 65 IS 4 BP 931 EP 942 PG 12 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA HN945 UT WOS:A1992HN94500010 ER PT J AU CLAVERIE, A LILIENTALWEBER, Z AF CLAVERIE, A LILIENTALWEBER, Z TI STRUCTURE AND ORIENTATION OF AS PRECIPITATES IN GAAS GROWN AT LOW-TEMPERATURE BY MOLECULAR-BEAM EPITAXY SO PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES LA English DT Article AB The structure and orientation relationships of the precipitates found in arsenic-rich GaAs layers grown at low temperature by molecular beam epitaxy after annealing have been elucidated by high resolution electron microscopy, transmission electron diffraction and computer simulation of the diffraction patterns. These small precipitates are hexagonal arsenic with an orientation relationship which is of high symmetry (3m). Therefore, symmetry group theory predicts the existence of four orientation variants which are indeed experimentally observed. This orientation relationship usually provides the lowest interfacial and elastic energies obtainable by the precipitates within this matrix. The absence of well-defined facets in the interfacial regions seems to indicate that the hexagonal structure may not be the initial nucleation structure. Other orientation relationships are found in some precipitates but they are identified as 'accidental' and then thought to be subject to experimental (growth and annealing) conditions. We have also used the moire fringe technique to obtain evidence of strain distribution within precipitates. It has been found that the strain within precipitates is strongly anisotropic, leading to lattice spacing compression in some directions and expansion in other. Lattice spacings vary by up to 3% near the interfacial regions. The resulting matrix stress in the surrounding regions can be easily relaxed from one variant to the other through a 90-degrees rotation along a <100>GaAs direction. C1 CEMES,CNRS,F-31055 TOULOUSE,FRANCE. RP CLAVERIE, A (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. RI Schaff, William/B-5839-2009; Liliental-Weber, Zuzanna/H-8006-2012 NR 18 TC 22 Z9 22 U1 0 U2 1 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0141-8610 J9 PHILOS MAG A JI Philos. Mag. A-Phys. Condens. Matter Struct. Defect Mech. Prop. PD APR PY 1992 VL 65 IS 4 BP 981 EP 1002 PG 22 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA HN945 UT WOS:A1992HN94500013 ER PT J AU DABROWSKI, B RADAELLI, P HINKS, DG MITCHELL, AW VAUGHEY, JT GROENKE, DA POEPPELMEIER, KR AF DABROWSKI, B RADAELLI, P HINKS, DG MITCHELL, AW VAUGHEY, JT GROENKE, DA POEPPELMEIER, KR TI NEW FAMILY OF SUPERCONDUCTING COPPER OXIDES - GASR2LN1-XCAXCU2O7 SO PHYSICA C LA English DT Article AB We have prepared a new copper oxide, GaSr2Y1-xCaxCu2O7 (0 less-than-or-equal-to x less-than-or-equal-to 0.4), that becomes superconducting after high-pressure oxygen annealing. While the undoped parent compound, x = 0, does not show three-dimensional magnetic order above 4 K, probably due to the presence of the thick ionic region separating the CuO2 layers, superconductivity with a high-T(c) (approximately 70 K) is possible for the doped compositions. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. NORTHWESTERN UNIV,DEPT CHEM,EVANSTON,IL 60208. RP DABROWSKI, B (reprint author), NO ILLINOIS UNIV,DEPT PHYS,DE KALB,IL 60115, USA. RI Radaelli, Paolo/C-2952-2011 OI Radaelli, Paolo/0000-0002-6717-035X NR 8 TC 43 Z9 43 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 APR 1 PY 1992 VL 193 IS 1-2 BP 63 EP 67 DI 10.1016/0921-4534(92)90869-E PG 5 WC Physics, Applied SC Physics GA HP252 UT WOS:A1992HP25200010 ER PT J AU FENG, AG LUO, L MARTIN, J MAGGIORE, CJ AF FENG, AG LUO, L MARTIN, J MAGGIORE, CJ TI INSITU GROWTH OF Y1BA2CU3O7-X THIN-FILMS DIRECTLY ON SAPPHIRE BY TEMPERATURE-CONTROLLED CHEMICAL VAPOR-DEPOSITION SO PHYSICA C LA English DT Article AB A temperature-controlled chemical vapor deposition (TC-CVD) process was developed for in-situ growth of highly c-axis orientated Y1Ba2Cu3O7+x (YBCO) thin films directly on sapphire substrates. This new CVD process, for the first time, uses programmable temperature controllers to optimize and tailor the qualities of deposited YBCO films by precisely control the temperatures of substrates and source compounds in pre-determined temperature profiles. By employing a substrate temperature (T(s)) ramping from T(s) (high) of 825-degrees-C to T(s) (low) of 735-degrees-C during deposition, we were able to grow highest T(c) and J(c) YBCO thin films on sapphire without buffer layer. DC transport four point measurement on the as-deposited films gave a T(c(onset)) at 92 K and T(c(zero)) at 84 K. Critical current density of 4 x 10(4) A/cm2 at 77 K and zero magnetic field was obtained for the films. The as-deposited films were also characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). C1 UNIV CALIF LOS ALAMOS SCI LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. RP FENG, AG (reprint author), SUNY ALBANY,DEPT PHYS,ALBANY,NY 12222, USA. NR 11 TC 3 Z9 3 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD APR 1 PY 1992 VL 193 IS 1-2 BP 105 EP 109 DI 10.1016/0921-4534(92)90875-D PG 5 WC Physics, Applied SC Physics GA HP252 UT WOS:A1992HP25200016 ER PT J AU SCHIRBER, JE OVERMYER, DL VENTURINI, EL GINLEY, DS MOROSIN, B AF SCHIRBER, JE OVERMYER, DL VENTURINI, EL GINLEY, DS MOROSIN, B TI PRESSURE-DEPENDENCE OF THE SUPERCONDUCTING TRANSITION-TEMPERATURE OF TL2BA2CUO(6+DELTA) FOR DELTA-]0 SO PHYSICA C LA English DT Article AB We report studies of Tl2Ba2CuO6+delta for material where delta --> 0. This results in the highest T(c) (near 93 K) yet achieved in this system and a relatively large positive value of dT(c)/dP to be contrasted with material with delta approximately 0.2 where T(c) is near 40 K and dT(c)/dP is large and negative. RP SCHIRBER, JE (reprint author), SANDIA NATL LABS,ORG 1090,ALBUQUERQUE,NM 87185, USA. NR 7 TC 9 Z9 9 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 APR 1 PY 1992 VL 193 IS 1-2 BP 126 EP 128 DI 10.1016/0921-4534(92)90878-G PG 3 WC Physics, Applied SC Physics GA HP252 UT WOS:A1992HP25200019 ER PT J AU GEETA, Y DABROWSKI, B MINI, SM RAMANATHAN, M ALP, EE AF GEETA, Y DABROWSKI, B MINI, SM RAMANATHAN, M ALP, EE TI OXIDATION-STATE OF COPPER IN RE2CUO4 COMPOUNDS DETERMINED VIA XANES AND BOND VALENCE METHODS SO PHYSICA C LA English DT Article ID HIGH-TC SUPERCONDUCTORS; OXYGEN SITES; OXIDES; CHARGE; ND2-XCEXCUO4; CRYSTALS; HOLES AB The copper oxidation state was determined from bond valence sums and X-ray absorption near edge structure for the simple T' structure. There is a similarity in the overall dependence of copper valence with respect to the lattice constant, a, for both XANES as well as BVS. The XANES data confirm electron diffraction and pair distribution function measurements which show that the local structure is significantly distorted from the average T' structure. C1 NO ILLINOIS UNIV,DEPT PHYS,DE KALB,IL 60115. RP GEETA, Y (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 24 TC 3 Z9 3 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD APR 1 PY 1992 VL 193 IS 1-2 BP 212 EP 216 DI 10.1016/0921-4534(92)90889-K PG 5 WC Physics, Applied SC Physics GA HP252 UT WOS:A1992HP25200030 ER PT J AU COOPER, F SIMMONS, LM SODANO, P AF COOPER, F SIMMONS, LM SODANO, P TI TOPOLOGICAL KINKS IN PHI(2N) FIELD-THEORIES - A VARIATIONAL APPROACH SO PHYSICA D LA English DT Article ID ANTIKINK INTERACTIONS AB The delta-expansion and the linear delta-expansion are analytical perturbation techniques that enable one to find approximate analytic solutions to nonlinear problems. These expansions, augmented by new variational strategies, often yield excellent results already in first order. We study in this paper the static kinks in scalar field theories with V[phi] = - 1/2m2-phi-2 + g-phi-2n using these techniques. We find excellent agreement between the lowest order variational approximation in both methods and the exact answer. We also estimate the energy of the first excited quantum state by considering small oscillations about the kink motion and using our variational wave functions and a shape parameter ansatz for the first excited state wave function. C1 UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. UNIV PERUGIA,SEZ IST NAZL FIS NUCL,I-06100 PERUGIA,ITALY. UNIV PERUGIA,DIPARTIMENTO FIS,I-06100 PERUGIA,ITALY. SANTA FE INST,SANTA FE,NM 87501. RP COOPER, F (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 23 TC 8 Z9 8 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2789 J9 PHYSICA D JI Physica D PD APR PY 1992 VL 56 IS 1 BP 68 EP 83 DI 10.1016/0167-2789(92)90051-N PG 16 WC Mathematics, Applied; Physics, Multidisciplinary; Physics, Mathematical SC Mathematics; Physics GA HT165 UT WOS:A1992HT16500005 ER PT J AU MILONNI, PW SHIH, ML AF MILONNI, PW SHIH, ML TI SOURCE THEORY OF THE CASIMIR FORCE SO PHYSICAL REVIEW A LA English DT Article ID LIFSHITZ THEORY AB We show how the Casimir force between dielectrics can be calculated in terms of source fields, with no explicit reference to zero-point-field energy. Using Feynman's interpretation of the Lamb shift, the commutativity of equal-time electron and field operators, and a relation between a Green function and a vacuum-field-correlation function, we show why the theories of Lifshitz, van Kampen, and Schwinger produce identical results, even though they appear to be based on very different physical premises. We suggest the possibility of modifying van der Waals-Casimir forces with any external field having some degree of spatial coherence. RP MILONNI, PW (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,MAIL STOP B212,LOS ALAMOS,NM 87545, USA. NR 40 TC 55 Z9 58 U1 1 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 APR 1 PY 1992 VL 45 IS 7 BP 4241 EP 4253 DI 10.1103/PhysRevA.45.4241 PN A PG 13 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HN474 UT WOS:A1992HN47400010 ER PT J AU CHEW, GF AF CHEW, GF TI QUANTUM-ELECTRODYNAMIC MODEL OF ISOLATED MACROSCOPIC SYSTEMS WITH A RECORDABLE CONNECTION TO SURROUNDINGS SO PHYSICAL REVIEW A LA English DT Article AB Intermediate-range "high-frequency" electromagnetic interaction between varying-sized mesoscopic chunks of semicondensed electrically neutral matter favors spatial clustering of larger chunks into "isolated" macroscopic systems. A complementary aspect of QED provides, via lower-frequency coherent states (with a classical-radiation interpretation) and the Raman effect, quantum-mechanical meaning for "awareness of surroundings" by isolated macroscopic systems. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV PHYS,THEORET PHYS GRP,BERKELEY,CA 94720. RP CHEW, GF (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 7 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 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD APR 1 PY 1992 VL 45 IS 7 BP 4312 EP 4318 DI 10.1103/PhysRevA.45.4312 PN A PG 7 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HN474 UT WOS:A1992HN47400018 ER PT J AU BRUCH, R SCHNEIDER, D CHEN, MH CHUNG, KT DAVIS, BF AF BRUCH, R SCHNEIDER, D CHEN, MH CHUNG, KT DAVIS, BF TI ATOMIC K-SHELL BINDING-ENERGIES OF MULTIPLY CHARGED NEON IONS STUDIED BY ZERO-DEGREE AUGER-ELECTRON SPECTROSCOPY SO PHYSICAL REVIEW A LA English DT Article ID SADDLE-POINT TECHNIQUE; BE-LIKE SYSTEMS; 1S2S2P25-RHO-1S2P35S0 TRANSITION; FINE-STRUCTURE; IONIZED NEON; SPECTRA; RECALIBRATION; SCATTERING; RESONANCES; COLLISIONS AB In this work we report an improved experimental determination of K-shell binding energies from Be-like Ne6+, B-like Ne5+, and C-like Ne4+ ground-state multiply charged ions using high-resolution Ne-K Auger-electron spectroscopy. The derived energy differences, namely, Ne6+ E(1s(2)2s2)1S-Ne7+ E(1s2s2)2S, Ne5+ E(1s(2)2s(2)2p)2P-degrees-Ne6+ E(1s2s(2)2p)3P-degrees, and Ne4+ E(1s(2)2s(2)2p2)3P-Ne5+ E(1s2s(2)2p2(P3))4P are 1099.1, 1048.5, and 1001.8 eV, respectively. These energies are accurate to within +/- 0.1 eV. Theoretically, we have studied relativistic binding energies of Ne(q)+ (q = 6, 5, and 4) by using the (i) saddle-point technique, (ii) 1/Z method, and (iii) multiconfiguration Dirac-Fock model. Excellent agreement with experiment is obtained. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DIV HIGH TEMP PHYS,LIVERMORE,CA 94550. N CAROLINA STATE UNIV,DEPT PHYS,RALEIGH,NC 27650. UNIV N CAROLINA,DEPT PHYS,WILMINGTON,NC 28403. RP BRUCH, R (reprint author), UNIV NEVADA,DEPT PHYS,RENO,NV 89557, USA. OI Davis, Brian/0000-0003-4043-8077 NR 43 TC 4 Z9 4 U1 1 U2 2 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 APR 1 PY 1992 VL 45 IS 7 BP 4476 EP 4480 DI 10.1103/PhysRevA.45.4476 PN A PG 5 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HN474 UT WOS:A1992HN47400036 ER PT J AU LYNCH, DL SCHNEIDER, BI AF LYNCH, DL SCHNEIDER, BI TI MOLECULAR PHOTOIONIZATION USING THE COMPLEX KOHN VARIATIONAL METHOD SO PHYSICAL REVIEW A LA English DT Article ID PHOTO-IONIZATION; ELECTRON-IMPACT; CROSS-SECTIONS; COLLISIONS; SCATTERING; EXCITATION; EXPRESSIONS; PRINCIPLE AB We have applied the complex Kohn variational method to the study of molecular-photoionization processes. This requires electron-ion scattering calculations enforcing incoming boundary conditions. The sensitivity of these results to the choice of the cutoff function in the Kohn method has been studied and we have demonstrated that a simple matching of the irregular function to a linear combination of regular functions produces accurate scattering phase shifts. C1 BROWN UNIV,DEPT CHEM,PROVIDENCE,RI 02912. UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORY,LOS ALAMOS,NM 87545. NR 27 TC 15 Z9 15 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 APR 1 PY 1992 VL 45 IS 7 BP 4494 EP 4498 DI 10.1103/PhysRevA.45.4494 PN A PG 5 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HN474 UT WOS:A1992HN47400039 ER PT J AU INOKUTI, M KOWARI, K KIMURA, M AF INOKUTI, M KOWARI, K KIMURA, M TI STATISTICAL FLUCTUATIONS IN THE YIELD OF IONIZATION DUE TO PROTONS OR ALPHA-PARTICLES SO PHYSICAL REVIEW A LA English DT Article ID TIME-DEPENDENT ASPECTS; ELECTRON DEGRADATION; CROSS-SECTIONS; FANO FACTOR; COLLISIONS; ARGON; AR AB An analytic method is presented for the calculation of various indices that characterize statistical fluctuations in ionization yields, specifically for the incidence of an ion such as a proton or alpha-particle at a high speed. A general expression for the Fano factor for ion incidence is derived, and the relation to the Fano factor for electron incidence is clarified. For an illustration, the theory is applied to protons incident on argon. The resulting Fano factor for protons of energies between 0.1 and 2 MeV is nearly the same as that for electrons at the same speeds, and it is considerably lower than the values measured with alpha-particles. RP INOKUTI, M (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 28 TC 4 Z9 4 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 APR 1 PY 1992 VL 45 IS 7 BP 4499 EP 4506 DI 10.1103/PhysRevA.45.4499 PN A PG 8 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HN474 UT WOS:A1992HN47400040 ER PT J AU WANG, JY REINHOLD, CO BURGDORFER, J AF WANG, JY REINHOLD, CO BURGDORFER, J TI ELECTRON-ELECTRON INTERACTION AND 2-CENTER EFFECTS IN PROJECTILE IONIZATION AT BACKWARD EMISSION ANGLES SO PHYSICAL REVIEW A LA English DT Article ID DIFFERENTIAL CROSS-SECTIONS; ION-ATOM COLLISIONS; CHARGE-TRANSFER; HE COLLISIONS; IMPACT; CONTINUUM; CAPTURE; HYDROGEN; PARTICLE; SPECTRA AB We analyze the electron emission spectrum into backward angles for projectile ionization in 0.5-MeV/u H0 and He+ on He collisions. The energy and angular distributions of the ejected electron are calculated taking into account both scattering correlations and two-center effects. Two-center effects are treated using the continuum-distorted-wave approximation and the classical-trajectory Monte Carlo method. Correlation effects are described in terms of a Born series including contributions up to second order. Both contributions are found to enhance significantly the electron-loss cross section in near-symmetric projectile-target collision systems. We find improved agreement with experiment for He+ on He collisions. Extensions to heavier targets are also discussed. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP WANG, JY (reprint author), UNIV TENNESSEE,KNOXVILLE,TN 37996, USA. NR 51 TC 21 Z9 21 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 APR 1 PY 1992 VL 45 IS 7 BP 4507 EP 4518 DI 10.1103/PhysRevA.45.4507 PN A PG 12 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HN474 UT WOS:A1992HN47400041 ER PT J AU REED, KJ CHEN, MH AF REED, KJ CHEN, MH TI DISTORTED-WAVE CALCULATIONS OF CROSS-SECTIONS FOR ELECTRON-IMPACT IONIZATION OF LITHIUM-LIKE IONS SO PHYSICAL REVIEW A LA English DT Article ID BE-LIKE IONS; EXCITATION-AUTOIONIZATION; C-3+ IONS; AUGER; EMISSION; FE-15+; RATES; O-5+ AB We used distorted-wave and multiconfigurational Dirac-Fock methods to calculate direct and indirect contributions to cross sections for electron-impact ionization of C3+, N4+, O5+, and F6+. The features due to excitation autoionization and resonant excitation double autoionization observed in recent cross-beam measurements [G. Hofmann et al., Z. Phys. D 16, 113 (1990)] are well reproduced in our results. Our cross sections are also in good agreement with reported results of nonrelativistic close-coupling calculations [S. S. Tayal and R. J. W. Henry, Phys, Rev. A 42, 1831 (1990); 44, 2955 (1991)] over most of the energy range studied. We examine the effects of radiative decay on the intermediate states, and we show that neglect of certain channels in the close-coupling calculation results in overestimation of the cross sections in the region of the 1s2s2pnl resonances. RP REED, KJ (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DIV HIGH TEMP PHYS,LIVERMORE,CA 94550, USA. NR 24 TC 17 Z9 17 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD APR 1 PY 1992 VL 45 IS 7 BP 4519 EP 4524 DI 10.1103/PhysRevA.45.4519 PN A PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HN474 UT WOS:A1992HN47400042 ER PT J AU CHEN, MH REED, KJ AF CHEN, MH REED, KJ TI ELECTRON-IMPACT IONIZATION OF HIGHLY CHARGED LITHIUM-LIKE IONS SO PHYSICAL REVIEW A LA English DT Article ID LI-LIKE IONS; DOUBLE AUGER PROCESSES; RAY-EMISSION RATES; BE-LIKE IONS; EXCITATION-AUTOIONIZATION; CROSS-SECTIONS; RELATIVISTIC AUGER; C-3+ IONS; FE-15+; BREIT AB We have calculated electron-impact ionization cross sections for Li-like Ar15+, Fe23+, Kr33+, and Xe51+ ions for incident electron energies between 3 and 4 times the ionization threshold using the relativistic distorted-wave and the multiconfiguration Dirac-Fock methods. The calculations include direct-ionization, excitation-autoionization and resonant-excitation-double-autoionization processes. There are many narrow resonances due to the excitation of the 1s2s3lnl' states. The effect of indirect processes persists to very highly charged ions in the isoelectronic sequence. RP CHEN, MH (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DIV HIGH TEMP PHYS,LIVERMORE,CA 94550, USA. NR 25 TC 15 Z9 16 U1 1 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD APR 1 PY 1992 VL 45 IS 7 BP 4525 EP 4529 DI 10.1103/PhysRevA.45.4525 PN A PG 5 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HN474 UT WOS:A1992HN47400043 ER PT J AU GULYAS, L SARKADI, L PALINKAS, J KOVER, A VAJNAI, T SZABO, G VEGH, J BERENYI, D ELSTON, SB AF GULYAS, L SARKADI, L PALINKAS, J KOVER, A VAJNAI, T SZABO, G VEGH, J BERENYI, D ELSTON, SB TI CUSP-SHAPE STUDIES WITH HE+ IONS AT 1.41-AU AND 2.41-AU IMPACT VELOCITIES SO PHYSICAL REVIEW A LA English DT Article ID CONTINUUM STATES; ELECTRON-CAPTURE; SPECTRA; ECC AB The electron loss to the continuum (ELC) process was investigated in He+-(He,Ar) collisions at 1.41- and 2.41-a.u. impact velocities. The cusp-shaped energy distributions of electrons ejected into the forward direction were measured in coincidence with the scattered He2+ projectile ions. The shape of these cusps was studied by fitting the multipole series expansion [Meckbach, Nemirovsky, and Garibotti, Phys. Rev. A 24, 1793 (1981)] of the measured spectra using B(nj), the nth-order expansion coefficients of the jth-order Legendre polynomials, as fitting parameters. The observed skewness of the spectra (nonzero beta(1) = B(01)/B(00) values) indicates the importance of the higher-order theories in the description of the distribution of ELC electrons. A dip at the top of the peak ("cusp inversion"), reflected by a positive beta(2) = B(02)/B(00) value, was observed in the 1.41-a.u. He+-He collision. C1 UNIV MISKOLC,DEPT PHYS,H-3515 MISKOLC,HUNGARY. UNIV TENNESSEE,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP GULYAS, L (reprint author), HUNGARIAN ACAD SCI,ATOMKI,INST NUCL RES,POB 51,H-4001 DEBRECEN,HUNGARY. RI Vegh, Janos/A-7200-2008; Kover, Akos/C-2408-2008; Palinkas, Jozsef/B-2993-2011; OI Vegh, Janos/0000-0002-3247-7810 NR 18 TC 9 Z9 9 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 APR 1 PY 1992 VL 45 IS 7 BP 4535 EP 4541 DI 10.1103/PhysRevA.45.4535 PN A PG 7 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HN474 UT WOS:A1992HN47400045 ER PT J AU CHEN, MH AF CHEN, MH TI RESONANT TRANSFER AND EXCITATION IN COLLISIONS OF CHLORINE-LIKE IONS WITH H-2 TARGETS SO PHYSICAL REVIEW A LA English DT Article ID + AR COLLISIONS; CROSS-SECTIONS; LIGHT TARGETS; ELECTRON-TRANSFER; ATOM COLLISIONS; HE; CAPTURE; SPECTROSCOPY; CA-17+; AUGER AB The resonant transfer and excitation cross sections through the LMM transitions in collisions of chlorinelike Fe9+, Nb24+, and La40+ with H-2 targets were calculated in impulse approximation using the multiconfiguration Dirac-Fock method. The effect of relativity reduces the total LMM resonance strength for La40+ by 29%. The angular distribution corrections at theta = 90-degrees increase the cross sections by an amount less than 10%. The present theoretical predictions for La40+ colliding with H-2 are in reasonable agreement with the experimental observations. RP CHEN, MH (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DIV HIGH TEMP PHYS,LIVERMORE,CA 94550, USA. NR 26 TC 3 Z9 3 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 APR 1 PY 1992 VL 45 IS 7 BP 4604 EP 4609 DI 10.1103/PhysRevA.45.4604 PN A PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HN474 UT WOS:A1992HN47400052 ER PT J AU COLLINS, LA SCHNEIDER, BI NOBLE, CJ AF COLLINS, LA SCHNEIDER, BI NOBLE, CJ TI ELECTRON-SCATTERING FROM H-2(+) - RESONANCES IN THE PI-SYMMETRIES SO PHYSICAL REVIEW A LA English DT Article ID SIMPLE DISCRETIZATION METHOD; LINEAR-ALGEBRAIC APPROACH; MATRIX PROPAGATION PROGRAM; DISSOCIATIVE-RECOMBINATION; AUTOIONIZATION WIDTHS; MOLECULE COLLISIONS; INTERFERING RESONANCES; DIFFERENTIAL-EQUATIONS; VARIATIONAL METHOD; COUPLED EQUATIONS AB We present the results of calculations for e- + H-2+ scattering in the region below the first excited state. We employ three distinct and independent methods, close-coupling linear algebraic, effective-optical-potential linear algebraic, and R matrix, to examine the collision at the highest level of sophistication and to provide a valuable check on the results of a single technique. For the (1)PI(u) and (3)PI(u) symmetries, we find strong interference effects between various autoionizing series, leading to significant variations of the resonance width with internuclear separation R. Such variations may have profound effects on such processes as photoionization, dissociation, and recombination. For the (1)PI(g) and (3)PI(g) symmetries, we observe monotonic behavior of the width with R and find no evidence of strong interference effects or rapid changes. C1 SERC, DARESBURY NATL LAB, DIV TCS, WARRINGTON WA4 4AD, ENGLAND. RP COLLINS, LA (reprint author), UNIV CALIF LOS ALAMOS SCI LAB, DIV T, LOS ALAMOS, NM 87544 USA. NR 78 TC 25 Z9 25 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD APR 1 PY 1992 VL 45 IS 7 BP 4610 EP 4620 DI 10.1103/PhysRevA.45.4610 PN A PG 11 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HN474 UT WOS:A1992HN47400053 ER PT J AU SMITH, AV RAYMOND, TD RILEY, ME AF SMITH, AV RAYMOND, TD RILEY, ME TI MEASUREMENT OF SELECT TRANSITION STRENGTHS AND AUTOIONIZING LIFETIMES IN ATOMIC OXYGEN SO PHYSICAL REVIEW A LA English DT Article ID VACUUM-ULTRAVIOLET TRANSITIONS; ABSOLUTE OSCILLATOR STRENGTHS; ELECTRON-IMPACT MEASUREMENT; DIPOLE-ALLOWED TRANSITIONS; CROSS-SECTIONS; 2-PHOTON ABSORPTION; O-I; DISSOCIATIVE EXCITATION; CONTAINING MOLECULES; STATES AB We have located the (2D-degree)4p'3F and (2D-degree)3p'3P autoionizing states of atomic oxygen and measured the autoionization-dominated lifetimes for the (2D-degree)3p'1.3P, and (2D-degree)3p'3D, 3F states. In addition, we have measured transition strengths for the (4S-degree)3p 3P to (2D-degree)3s'3D-degree and (2D-degree)3s'3D-degree to (2D-degree)3p'1,3P,3D,3F transitions, and characterized the 2p4 3P to (4S-degree)3p 3P two-photon resonance for saturating light intensities. In making these original measurements, we use a variety of multiphoton-ionization methods, including Rabi-oscillation and damped-Rabi-oscillation methods. RP SMITH, AV (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 51 TC 5 Z9 5 U1 0 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 APR 1 PY 1992 VL 45 IS 7 BP 4688 EP 4696 DI 10.1103/PhysRevA.45.4688 PN A PG 9 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HN474 UT WOS:A1992HN47400063 ER PT J AU MCCORMACK, EF PRATT, ST DEHMER, PM DEHMER, JL AF MCCORMACK, EF PRATT, ST DEHMER, PM DEHMER, JL TI DOUBLE-RESONANCE SPECTROSCOPY OF A COMPLEX RESONANCE IN MOLECULAR NITROGEN SO PHYSICAL REVIEW A LA English DT Article ID QUANTUM-DEFECT THEORY; HIGH-RESOLUTION; MULTIPHOTON IONIZATION; ALTERNATIVE PARAMETERS; CHANNEL INTERACTIONS; PHOTOIONIZATION; AUTOIONIZATION; ABSORPTION; SERIES; STATES AB Double-resonance spectroscopy via several rotational levels of the N2 alpha (1)PI(g), upsilon' = 5 state has been used to probe the rotational structure of a complex autoionizing resonance observed just below the X (2)SIGMA(g)+, upsilon+ = 1 threshold. A multichannel-quantum-defect-theory (MQDT) analysis confirms that the complex resonance is produced by the interaction of two interloping states with the np and nf Rydberg series converging to the X (2)SIGMA(g)+, upsilon+ = 1 limit. The quantum defects of the interlopers and their interaction strengths with the two Rydberg series are determined from fits of the MQDT model to the energies of the peaks observed in the complex resonance. The experimentally determined interaction parameters and those available from ab initio calculations are in fair agreement. The present results complete the interpretation of the photoionization spectrum of N2 in the energy region between the X (2)SIGMA(g)+, upsilon+ = 0 and 1 thresholds. RP MCCORMACK, EF (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 26 TC 11 Z9 11 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 APR 1 PY 1992 VL 45 IS 7 BP 4697 EP 4705 DI 10.1103/PhysRevA.45.4697 PN A PG 9 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HN474 UT WOS:A1992HN47400064 ER PT J AU OREG, J BERGMANN, K SHORE, BW ROSENWAKS, S AF OREG, J BERGMANN, K SHORE, BW ROSENWAKS, S TI POPULATION TRANSFER WITH DELAYED PULSES IN 4-STATE SYSTEMS SO PHYSICAL REVIEW A LA English DT Article ID ATOM-MOLECULE COLLISIONS; VIBRATIONAL LEVELS; RABI OSCILLATIONS; LASER; PASSAGE; BEAMS AB We present explicit analytic expressions for adiabatic dressed states which, in suitable limits, produce complete population transfer between initial and final states of a four-state excitation chain without ever placing appreciable population into intermediate states. The population-transfer scheme is a generalization of the three-state stimulated Raman adiabatic passage that makes use of counterintuitive pulse sequences. We demonstrate analytically and numerically that the four-state system differs in a very significant qualitative way from previously studied N-state systems with odd N. In particular, we find that the presence of modest detuning from single-photon resonance is critical to the success of population transfer. C1 UNIV KAISERSLAUTERN,DEPT PHYS,W-6750 KAISERSLAUTERN,GERMANY. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. BEN GURION UNIV NEGEV,DEPT PHYS,IL-84105 BEER SHEVA,ISRAEL. RP OREG, J (reprint author), NUCL RES CTR NEGEV,IL-84190 BEER SHEVA,ISRAEL. RI BERGMANN, KLAAS/D-5543-2011 NR 25 TC 69 Z9 70 U1 0 U2 2 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 APR 1 PY 1992 VL 45 IS 7 BP 4888 EP 4896 DI 10.1103/PhysRevA.45.4888 PN B PG 9 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HN476 UT WOS:A1992HN47600010 ER PT J AU KRAUSE, JL SCHAFER, KJ KULANDER, KC AF KRAUSE, JL SCHAFER, KJ KULANDER, KC TI CALCULATION OF PHOTOEMISSION FROM ATOMS SUBJECT TO INTENSE LASER FIELDS SO PHYSICAL REVIEW A LA English DT Article ID HARMONIC-GENERATION; MULTIPHOTON IONIZATION; OPTICAL HARMONICS; SIMPLIFIED MODEL; HYDROGEN-ATOM; RARE-GASES; RADIATION; SCATTERING; PULSES; RATES AB We use a nonperturbative method to solve the time-dependent Schrodinger equation for an electronic state of an atom subject to a very intense (> 10(13) W/cm2) laser. The oscillating, time-dependent dipole induced by the laser serves as a source for the photoemission. Calculations of single-atom photospectra reveal peaks at the odd harmonics of the incident laser field superimposed on a broad continuous background. We discuss a series of calculations for the hydrogen atom and a short-range Yukawa potential containing a variable number of bound states. At intensities up to a few times 10(13) W/cm2 at 1064 nm, we achieve stable, converged spectra that agree very well with previously published results. As the intensity increases to 10(14) W/cm2, the ionization rate increases to about 1% of the laser frequency, and converged results become extremely difficult to obtain, even for impractically large integration volumes. These difficulties are caused by a rising background due to electron density far from the nucleus and the increasing importance of the interaction of the wave function with the edges of the grid. We discuss the implications of our findings for calculations at high intensity and suggest alternative ways to calculate harmonic emission rates in the strong-ionization regime. RP KRAUSE, JL (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT PHYS,LIVERMORE,CA 94550, USA. NR 39 TC 366 Z9 372 U1 6 U2 25 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD APR 1 PY 1992 VL 45 IS 7 BP 4998 EP 5010 DI 10.1103/PhysRevA.45.4998 PN B PG 13 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HN476 UT WOS:A1992HN47600023 ER PT J AU RITCHIE, B AF RITCHIE, B TI TIME-DEPENDENT WAVE-PACKET THEORY FOR ELECTRON-SCATTERING SO PHYSICAL REVIEW A LA English DT Note ID HARTREE-FOCK THEORY; MULTIPHOTON IONIZATION; SCHRODINGER-EQUATION; COLLISIONS; EXCHANGE; HYDROGEN AB Time-dependent wave-packet theory is formulated for fairly-low-energy elastic electron scattering. The Schrodinger equation is solved numerically in the time and two spatial dimensions for e-He scattering in the static-local-exchange approximation. The angular distribution is calculated from a single pass through the region of the target and shows good agreement with the angular distribution calculated with knowledge of the phase shifts from the solution of the set of time-independent radial equations. RP RITCHIE, B (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 17 TC 7 Z9 7 U1 1 U2 2 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 APR 1 PY 1992 VL 45 IS 7 BP R4207 EP R4209 PN A PG 3 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HN474 UT WOS:A1992HN47400001 ER PT J AU KERR, WC HAWTHORNE, AM GOODING, RJ BISHOP, AR KRUMHANSL, JA AF KERR, WC HAWTHORNE, AM GOODING, RJ BISHOP, AR KRUMHANSL, JA TI 1ST-ORDER DISPLACIVE STRUCTURAL PHASE-TRANSITIONS STUDIED BY COMPUTER-SIMULATION SO PHYSICAL REVIEW B LA English DT Article ID TOTAL-ENERGY CALCULATIONS; ORDER-DISORDER SYSTEMS; MOLECULAR-DYNAMICS; INCOMMENSURATE SYSTEMS; VIBRATIONAL FREQUENCIES; UNIFIED APPROACH; BCC PHASE; MODEL; TRANSFORMATION; SCATTERING AB We have constructed a lattice-dynamical model which possesses many of the features occurring at first-order structural phase transitions in solids. The model includes an asymmetric nonlinear on-site potential and anharmonic interparticle interactions. The anharmonicity in the interaction is introduced in a way which lowers the phonon frequencies in the high-temperature, metastable phase. The interaction provides a mechanism for a vibrational-entropy-driven first-order phase transition. We present results from molecular-dynamics calculations which show (i) clear evidence in the thermodynamic functions for the existence of a first-order phase transition produced by heating from low temperature, and (ii) unusual properties for the position probability distribution and the dynamic structure factor. These spectral functions have significant intensity in the quasielastic region, and this contribution is strongly maximized near the transtion temperature. The wave-vector dependence of this "central peak" clearly points to the existence of propagating nonlinear modes. C1 QUEENS UNIV,DEPT PHYS,KINGSTON K7L 3N6,ONTARIO,CANADA. UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545. CORNELL UNIV,ATOM & SOLID STATE PHYS LAB,ITHACA,NY 14853. RP KERR, WC (reprint author), WAKE FOREST UNIV,OLIN PHYS LAB,WINSTON SALEM,NC 27109, USA. NR 56 TC 29 Z9 29 U1 1 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 13 BP 7036 EP 7053 DI 10.1103/PhysRevB.45.7036 PG 18 WC Physics, Condensed Matter SC Physics GA HL993 UT WOS:A1992HL99300007 ER PT J AU QIU, ZQ PEARSON, J BADER, SD AF QIU, ZQ PEARSON, J BADER, SD TI ADDITIVITY OF THE MAGNETOOPTIC KERR SIGNAL IN ULTRATHIN FE(110)/AG(111) SUPERLATTICES SO PHYSICAL REVIEW B LA English DT Article ID FE/CU BILAYERED FILMS; LAYERED STRUCTURES; THIN-FILMS; ENHANCEMENT; ROTATION; CO/PT; MEDIA; FE AB Fe(110)/Ag(111) superlattices were fabricated by molecular-beam epitaxy and investigated by means of the surface magneto-optic Kerr effect (SMOKE). Reflection high- and low-energy electron diffraction and Auger spectroscopy were used to determine that both Fe(110) on Ag(111) and Ag(111) on Fe(110) grow epitaxially. In situ SMOKE measurements were made as a function of the number of bilayers for four superlattice samples with bilayer thicknesses ranging from 19 to 25 angstrom. We find that the Kerr signal initially depends only on the total thickness of Fe and is independent of the intervening Ag layers. This result confirms that anticipated from a general macroscopic formalism evaluated in the thin-film limit. RP QIU, ZQ (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. RI Bader, Samuel/A-2995-2013; Qiu, Zi Qiang/O-4421-2016 OI Qiu, Zi Qiang/0000-0003-0680-0714 NR 29 TC 39 Z9 39 U1 2 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 13 BP 7211 EP 7216 DI 10.1103/PhysRevB.45.7211 PG 6 WC Physics, Condensed Matter SC Physics GA HL993 UT WOS:A1992HL99300025 ER PT J AU WU, RQ FREEMAN, AJ AF WU, RQ FREEMAN, AJ TI POSSIBLE 4D FERROMAGNETISM OF RH AND RU OVERLAYERS ON A AG(001) SUBSTRATE SO PHYSICAL REVIEW B LA English DT Article ID THIN-FILM MAGNETISM; PERPENDICULAR SURFACE ANISOTROPY; KERR-EFFECT OBSERVATION; ELECTRONIC-STRUCTURE; NI MONOLAYER; PD; METAMAGNETISM; PALLADIUM; SUSCEPTIBILITY; INTERFACES AB The possibility of 4d ferromagnetism is explored for Rh and Ru overlayers on a Ag(001) substrate using the full-potential linearized augmented-plane-wave method. The overlayer relaxation is found to be very small and to have no significant effect on the electronic and magnetic properties. The ferromagnetism of Rh/Ag(001) can be destroyed by an additional Ag layer-which attributes the lack of ferromagnetism in recent surface magneto-optic Kerr-effect experiments to the surface segregation between Rh and Ag atoms. However, Ru/Ag(001) is predicted to be ferromagnetic with both a larger magnetic moment and larger magnetic energy even after being covered by a Ag layer, and thus is more suitable for experimental verification. For both the Rh and Ru cases, the total hyperfine field is predicted to be too small for detecting these possible magnetism. Finally, the considerably strong overlayer-substrate Coulomb repulsion effect indicates that Ag is no longer the "benign" substrate for 4d overlayer magnetism that it is for the 3d metals. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP WU, RQ (reprint author), NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60208, USA. RI Wu, Ruqian/C-1395-2013 OI Wu, Ruqian/0000-0002-6156-7874 NR 43 TC 71 Z9 73 U1 0 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 13 BP 7222 EP 7228 DI 10.1103/PhysRevB.45.7222 PG 7 WC Physics, Condensed Matter SC Physics GA HL993 UT WOS:A1992HL99300027 ER PT J AU RUNGE, KJ AF RUNGE, KJ TI QUANTUM MONTE-CARLO CALCULATION OF THE LONG-RANGE ORDER IN THE HEISENBERG-ANTIFERROMAGNET SO PHYSICAL REVIEW B LA English DT Article ID SPIN-WAVE THEORY; SQUARE-LATTICE; GROUND-STATE; TEMPERATURE PROPERTIES; MODEL; LA2CUO4 AB A Green's-function Monte Carlo (GFMC) method is used to compute the staggered magnetization m dagger in the two-dimensional, spin-1/2 Heisenberg antiferromagnet on L X L square lattices, up to L = 12. Unlike previous GFMC calculations, the present method, which uses the forward-walking algorithm is unbiased and projects out the exact, rotationally invariant ground state. These calculations provide confirmation of the existence of long-range antiferromagnetic order in the ground state. A known relationship between m dagger and the leading finite-size correction, coupled with high-precision ground-state-energy calculations, is used to reduce the error in extrapolating to the thermodynamic limit. The data extrapolate to m dagger = 0.3075 +/- 0.0025, only slightly different from the spin-wave-theory result, 0.3034. Several perfect singlet trial wave functions used to reduce the statistical error are discussed. A possible explanation as to why exact-diagonalization extrapolations tend to yield low values of m dagger is presented. RP RUNGE, KJ (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 44 TC 77 Z9 77 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 13 BP 7229 EP 7236 DI 10.1103/PhysRevB.45.7229 PG 8 WC Physics, Condensed Matter SC Physics GA HL993 UT WOS:A1992HL99300028 ER PT J AU GRONBECHJENSEN, N AF GRONBECHJENSEN, N TI ZERO-VOLTAGE STATES IN AC-DRIVEN LONG JOSEPHSON-JUNCTIONS SO PHYSICAL REVIEW B LA English DT Article ID PHASE-LOCKING; DYNAMICS AB Magnetic coupling to long Josephson junctions is analyzed by use of a recently proposed model. The model is discussed in detail, and for a specific geometry of the system we are able to make analytical predictions of zero-voltage steps in the I-V characteristic of the junction embedded in an ac magnetic field. Good agreement is found when comparisons are made to numerical experiments performed on the nonsimplified system. C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545. UNIV CALIF LOS ALAMOS SCI LAB,ADV COMP LAB,LOS ALAMOS,NM 87545. RP GRONBECHJENSEN, N (reprint author), STANFORD UNIV,DEPT APPL PHYS,STANFORD,CA 94305, USA. NR 18 TC 13 Z9 13 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 13 BP 7315 EP 7320 DI 10.1103/PhysRevB.45.7315 PG 6 WC Physics, Condensed Matter SC Physics GA HL993 UT WOS:A1992HL99300039 ER PT J AU RUNDE, M ROUTBORT, JL ROTHMAN, SJ GORETTA, KC MUNDY, JN XU, X BAKER, JE AF RUNDE, M ROUTBORT, JL ROTHMAN, SJ GORETTA, KC MUNDY, JN XU, X BAKER, JE TI TRACER DIFFUSION OF OXYGEN IN BI2SR2CACU2OX SO PHYSICAL REVIEW B LA English DT Article ID CU-O SUPERCONDUCTOR; SR; TC; MODULATION AB Tracer diffusion of O-18 has been investigated in dense polycrystals and in the c direction in single crystals of Bi2Sr2CaCu2Ox between 300 and 700-degrees-C under one atmosphere of oxygen. Penetration profiles were determined by secondary-ion mass spectrometry. The diffusional anisotropy as measured by the ratio of the diffusion coefficients in the polycrystals [D = 1.7 x 10(-5) exp(-0.93 eV/kT) cm2/s] to the diffusion coefficients parallel to the c axis of the single crystals [D = 0.6 exp(-2.20 eV/kT) cm2/s] is large and temperature dependent. The results suggest that diffusion in the ab plane and in the c direction takes place by different mechanisms. C1 ARGONNE NATL LAB,DIV MAT & COMPONENTS TECHNOL,ARGONNE,IL 60439. UNIV ILLINOIS,CTR MICROANAL MAT,URBANA,IL 61801. NORWEGIAN ELECT POWER RES INST,N-7034 TRONDHEIM,NORWAY. RP RUNDE, M (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 22 TC 72 Z9 73 U1 1 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 13 BP 7375 EP 7382 DI 10.1103/PhysRevB.45.7375 PG 8 WC Physics, Condensed Matter SC Physics GA HL993 UT WOS:A1992HL99300046 ER PT J AU KEIMER, B AHARONY, A AUERBACH, A BIRGENEAU, RJ CASSANHO, A ENDOH, Y ERWIN, RW KASTNER, MA SHIRANE, G AF KEIMER, B AHARONY, A AUERBACH, A BIRGENEAU, RJ CASSANHO, A ENDOH, Y ERWIN, RW KASTNER, MA SHIRANE, G TI NEEL TRANSITION AND SUBLATTICE MAGNETIZATION OF PURE AND DOPED LA2CUO4 SO PHYSICAL REVIEW B LA English DT Article ID HEISENBERG-ANTIFERROMAGNET; PHASE-TRANSITIONS; SPIN CORRELATIONS; LOW-TEMPERATURES; DYNAMICS; CONDUCTIVITY; EXCITATIONS; YBA2CU3O6+X AB We have measured the sublattice magnetization of stoichiometric La2CuO4 (T(N) = 325 K) and La2Cu0.95Zn0.05O4 (T(N) = 157 K). We discuss the data for La2CuO4 and other lamellar copper oxides in terms of the quantum Heisenberg model including weak XY anisotropy and interlayer coupling. Spin-wave theory and a generalized Schwinger-boson mean-field theory are used to predict the ordered moment as a function of temperature without adjustable parameters. We also discuss the influence of different dopants on the Neel temperature and sublattice magnetization. C1 TEL AVIV UNIV, SCH PHYS & ASTRON, IL-69978 TEL AVIV, ISRAEL. BOSTON UNIV, DEPT PHYS, BOSTON, MA 02215 USA. TOHOKU UNIV, DEPT PHYS, SENDAI, MIYAGI 980, JAPAN. NATL INST STAND & TECHNOL, GAITHERSBURG, MD 20899 USA. BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. RP MIT, CTR MAT SCI & ENGN, CAMBRIDGE, MA 02139 USA. NR 33 TC 131 Z9 131 U1 1 U2 9 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 13 BP 7430 EP 7435 DI 10.1103/PhysRevB.45.7430 PG 6 WC Physics, Condensed Matter SC Physics GA HL993 UT WOS:A1992HL99300056 ER PT J AU PHILLIPS, R DENG, H CARLSSON, AE DAW, MS AF PHILLIPS, R DENG, H CARLSSON, AE DAW, MS TI IMPROVEMENT OF 6-DIMENSIONAL PROJECTION MODELS FOR THE ATOMIC-STRUCTURE OF QUASI-CRYSTALS SO PHYSICAL REVIEW B LA English DT Note ID ICOSAHEDRAL PHASE; ALLOYS; STABILITY AB Many six-dimensional-to-three-dimensional projection models for quasicrystals yield reasonable agreement with diffraction experiments but are still energetically unfavorable. We describe a procedure for improving the energetics of these models based upon the filling of vacant spaces, Monte Carlo chemical decoration techniques, and structural relaxations. A simplified pair-potential calculation indicates that these procedures reduce the total energy of the Ti-Mn system by more than 0.25 eV/atom. C1 SANDIA NATL LABS,LIVERMORE,CA 94550. WASHINGTON UNIV,ST LOUIS,MO 63130. NR 18 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 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 13 BP 7463 EP 7466 DI 10.1103/PhysRevB.45.7463 PG 4 WC Physics, Condensed Matter SC Physics GA HL993 UT WOS:A1992HL99300063 ER PT J AU BUZDIN, AI DAMJANOVIC, VP SIMONOV, AY AF BUZDIN, AI DAMJANOVIC, VP SIMONOV, AY TI THERMODYNAMIC PROPERTIES OF ATOMIC SUPERCONDUCTOR NORMAL-METAL MULTILAYERS SO PHYSICAL REVIEW B LA English DT Note ID CA-CU-O; ENERGY-GAP; LAYERED SUPERCONDUCTORS; RAMAN-SCATTERING; SINGLE-CRYSTALS; EXCITATIONS AB The densities of electronic states of superconducting (S) and normal-metal (N) layers in S/N superlattices are calculated. As follows from our consideration, the energy corresponding to the density-of-states maxima may be much higher than the BCS value, 1.76T(c). The connection of this result with tunneling spectra of high-T(c) superconductors is discussed. C1 TITOGRAD UNIV,DEPT PHYS,TITOGRAD,YUGOSLAVIA. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. RP BUZDIN, AI (reprint author), MV LOMONOSOV STATE UNIV,DEPT PHYS,HIGH TC SUPERCOND LAB,MOSCOW 117234,USSR. RI Buzdin, Alexander/I-6038-2013; Simonov, Andrei/C-1697-2015 OI Simonov, Andrei/0000-0001-6452-0214 NR 15 TC 15 Z9 15 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 13 BP 7499 EP 7502 DI 10.1103/PhysRevB.45.7499 PG 4 WC Physics, Condensed Matter SC Physics GA HL993 UT WOS:A1992HL99300073 ER PT J AU BOETTGER, JC TRICKEY, SB NOBEL, JA AF BOETTGER, JC TRICKEY, SB NOBEL, JA TI TOTAL-ENERGY CALCULATIONS OF SOLID H, LI, NA, K, RB, AND CS - COMMENT SO PHYSICAL REVIEW B LA English DT Letter ID METALLIC HYDROGEN; STRUCTURAL-PROPERTIES; ELECTRONIC-STRUCTURE; ALKALI-METALS; GROUND-STATE; PRESSURE; LITHIUM; PHASE; SUPERCONDUCTIVITY; 1ST-PRINCIPLES AB The presentation of recent augmented-plane-wave calculations of alkali-metal equilibrium crystal structures by Sigalas et al. [Phys. Rev. B 42, 11 637 (1990)] ignored what is known from both non-muffin-tin- (all-electron and pseudopotential) and muffin-tin-orbital calculations about the ground-state symmetry of those metals, and in some instances contradicted it. To illustrate the problem we give a thorough summary of the situation in Li, with brief remarks on other systems. C1 UNIV CALIF LOS ALAMOS SCI LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. UNIV FLORIDA,DEPT PHYS,QUANTUM THEORY PROJECT,GAINESVILLE,FL 32611. UNIV FLORIDA,DEPT CHEM,GAINESVILLE,FL 32611. RP BOETTGER, JC (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 25 TC 10 Z9 10 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 13 BP 7503 EP 7506 DI 10.1103/PhysRevB.45.7503 PG 4 WC Physics, Condensed Matter SC Physics GA HL993 UT WOS:A1992HL99300074 ER PT J AU FEENSTRA, R CHRISTEN, DK KLABUNDE, CE BUDAI, JD AF FEENSTRA, R CHRISTEN, DK KLABUNDE, CE BUDAI, JD TI ROLE OF OXYGEN VACANCIES IN THE FLUX-PINNING MECHANISM, AND HOLE-DOPING LATTICE DISORDER IN HIGH-CURRENT-DENSITY YBA2CU3O7-X FILMS SO PHYSICAL REVIEW B LA English DT Note ID THIN-FILMS AB Critical-current measurements on epitaxial YBa2Cu3O7-x films with 0 less-than-or-equal-to x less-than-or-equal-to 0.2 demonstrate that chain-site oxygen vacancies are not strong flux-pinning centers in high-J(c) films. J(c) decreased steadily with increasing x, consistent with the predicted, monotonic dependence of pinning energy on mobile-charge-carrier density in strongly pinned systems. A correlation between the oxygen pressure p(O2) during high-temperature growth and subsequent response to low-temperature variation of x was observed for T(c). Specifically, films grown at low p(O2) = 0.00026 atm appeared overdoped with holes after oxidation at p(O2) = 1.0 atm, indicative of hole-doping defect formation at low initial oxygen contents. RP FEENSTRA, R (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831, USA. RI Christen, David/A-9709-2008; Budai, John/R-9276-2016 OI Budai, John/0000-0002-7444-1306 NR 18 TC 44 Z9 44 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 13 BP 7555 EP 7558 DI 10.1103/PhysRevB.45.7555 PG 4 WC Physics, Condensed Matter SC Physics GA HL993 UT WOS:A1992HL99300090 ER PT J AU KIM, DH GRAY, KE KANG, JH AF KIM, DH GRAY, KE KANG, JH TI JOSEPHSON TUNNELING FOR MAGNETIC-FIELDS PERPENDICULAR TO DISCRETE NB JUNCTIONS - IMPLICATIONS FOR THE IRREVERSIBILITY CROSSOVER IN HIGH-TEMPERATURE SUPERCONDUCTORS SO PHYSICAL REVIEW B LA English DT Note ID TAILS AB It was recently suggested that coupling between the superconducting Cu-O bilayer or trilayer units in the highly anisotropic, high-temperature superconductors (HAHTS) can be described by incoherent Josephson tunneling. This paper confirms the assumed inverse dependence of the coupling energy on field, H, through measurements of the zero-bias resistance of discrete, high-quality, thin-film Nb Josephson junctions. This 1/H dependence was used to explain the flux-motion-induced broadening of resistive transitions in HAHTS for equivalent geometry with H parallel to the c axis. The Nb junction results also unambiguously confirm another recent suggestion: that field-induced dissipation can occur in Josephson junctions without the motion of vortices from an externally applied field, which in this case are pinned in the Nb electrodes. C1 WESTINGHOUSE ELECT CORP,CTR SCI & TECHNOL,PITTSBURGH,PA 15235. RP KIM, DH (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 13 TC 21 Z9 21 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 13 BP 7563 EP 7565 DI 10.1103/PhysRevB.45.7563 PG 3 WC Physics, Condensed Matter SC Physics GA HL993 UT WOS:A1992HL99300092 ER PT J AU MALEY, MP KUNG, PJ COULTER, JY CARTER, WL RILEY, GN MCHENRY, ME AF MALEY, MP KUNG, PJ COULTER, JY CARTER, WL RILEY, GN MCHENRY, ME TI BEHAVIOR OF CRITICAL CURRENTS IN BI-PB-SR-CA-CU-O/AG TAPES FROM TRANSPORT AND MAGNETIZATION MEASUREMENTS - DEPENDENCE UPON TEMPERATURE, MAGNETIC-FIELD, AND FIELD ORIENTATION SO PHYSICAL REVIEW B LA English DT Note ID CURRENT-DENSITY; SUPERCONDUCTORS; CREEP AB We have measured the dependence of the transport critical-current density on magnetic field and temperature of a high-J(c) Bi-Sr-Ca-Cu-O/Ag tape sample. At low temperature, J(c) > 10(4) A/cm2 extends to high fields as previously reported by several groups. For T > 20 K and with the applied field parallel to the c axis, J(c) declines precipitously with increasing field and temperature, reflecting the properties of intragranular pinning. The variation of J(c) with the angle between B and the tape normal is consistent with a two-dimensional model of the vortex lattice. Independent determination of J(c) by magnetic hysteresis measurement shows rough agreement with transport J(c)'s at low fields but falls below by a factor that increases with increasing field and temperature. This can be accounted for by a model for thermally activated flux motion. C1 AMER SUPERCOND CORP,WATERTOWN,MA 02172. CARNEGIE MELLON UNIV,PITTSBURGH,PA 15213. RP MALEY, MP (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. RI McHenry, Michael/B-8936-2009 NR 16 TC 74 Z9 74 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 13 BP 7566 EP 7569 DI 10.1103/PhysRevB.45.7566 PG 4 WC Physics, Condensed Matter SC Physics GA HL993 UT WOS:A1992HL99300093 ER PT J AU ZHENG, XY LOWNDES, DH ZHU, S BUDAI, JD WARMACK, RJ AF ZHENG, XY LOWNDES, DH ZHU, S BUDAI, JD WARMACK, RJ TI EARLY STAGES OF YBA2CU3O7-DELTA EPITAXIAL-GROWTH ON MGO AND SRTIO3 SO PHYSICAL REVIEW B LA English DT Note ID TILT BOUNDARIES; HETEROEPITAXY AB The initial stages of epitaxial growth of c-axis-perpendicular laser-ablated YBa2Cu3O7-delta (YBCO) thin films on SrTiO3 and MgO substrates were studied by scanning tunneling microscopy. Surface images of films grown on SrTiO3 with a sequential thickness variation reveal a transition from layerlike to island growth between 8 and 16 unit cells thickness, i.e., YBCO grows on SrTiO3 by a Stranski-Krastanov mechanism. Evidence also points to the existence of a slightly larger critical thickness for the introduction of screw dislocations into those films. In contrast, even the thinnest (approximately 8 cell thick) YBCO films were found to grow on MgO by an island mechanism, with screw-growth features clearly present. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,OAK RIDGE,TN 37831. RP ZHENG, XY (reprint author), UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996, USA. RI Budai, John/R-9276-2016 OI Budai, John/0000-0002-7444-1306 NR 18 TC 89 Z9 89 U1 0 U2 11 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 13 BP 7584 EP 7587 DI 10.1103/PhysRevB.45.7584 PG 4 WC Physics, Condensed Matter SC Physics GA HL993 UT WOS:A1992HL99300098 ER PT J AU SCHUTTLER, HB FEDRO, AJ AF SCHUTTLER, HB FEDRO, AJ TI COPPER-OXYGEN CHARGE EXCITATIONS AND THE EFFECTIVE-SINGLE-BAND THEORY OF CUPRATE SUPERCONDUCTORS SO PHYSICAL REVIEW B LA English DT Note ID HIGH-TC SUPERCONDUCTIVITY; EXTENDED HUBBARD-MODEL; DENSITY-FUNCTIONAL THEORY; STRONG-COUPLING MODELS; ELECTRONIC-STRUCTURE; WANNIER FUNCTIONS; OXIDE SUPERCONDUCTORS; CU OXIDES; LA2CUO4; HOLE AB We propose a formally controlled perturbative method for constructing an effective-single-band (SB) Hubbard theory from a multiband (MB) model for cuprate systems. Our SB theory explicitly incorporates the lowest MB Cu-O charge excitations, and thus possible charge-transfer instabilities, and remains valid, even for the extreme charge-fluctuation limit of the MB model, up to excitation energies of typically approximately 3-4 eV. This is contrasted with recent approximate slave-boson and diagrammatic studies of the MB model. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. NO ILLINOIS UNIV,DEPT PHYS,DE KALB,IL 60115. RP SCHUTTLER, HB (reprint author), UNIV GEORGIA,CTR SIMULAT PHYS,ATHENS,GA 30602, USA. NR 48 TC 105 Z9 105 U1 1 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 13 BP 7588 EP 7591 DI 10.1103/PhysRevB.45.7588 PG 4 WC Physics, Condensed Matter SC Physics GA HL993 UT WOS:A1992HL99300099 ER PT J AU SOUKOULIS, CM LI, QM GREST, GS AF SOUKOULIS, CM LI, QM GREST, GS TI QUANTUM PERCOLATION IN 3-DIMENSIONAL SYSTEMS SO PHYSICAL REVIEW B LA English DT Article ID SIZE SCALING APPROACH; DISORDERED-SYSTEMS; ANDERSON LOCALIZATION; RENORMALIZATION-GROUP; 3 DIMENSIONS; TRANSITION; STATES; MODEL AB The quantum site- and bond-percolation problems, which are defined by a disordered tight-binding Hamiltonian with a binary probability distribution, are studied using finite-size scaling methods. For the simple-cubic lattice, the dependence of the mobility edge on the strength of the disorder is obtained for both the site- and bond-percolation case. We find that the quantum percolation threshold is p(q)s = 0.44 +/- 0.01 for the site case and p(q)b = 0.32 +/- 0.01 for the bond case. A detailed numerical study of the density of states (DOS) is also presented. A rich structure in the DOS is obtained and its dependence on the concentration and strength of disorder is presented. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. MIT,DEPT CHEM,CAMBRIDGE,MA 02139. EXXON RES & ENGN CO,CORP RES SCI LAB,ANNANDALE,NJ 08801. RP SOUKOULIS, CM (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. RI Soukoulis, Costas/A-5295-2008 NR 31 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 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 14 BP 7724 EP 7729 DI 10.1103/PhysRevB.45.7724 PG 6 WC Physics, Condensed Matter SC Physics GA HN477 UT WOS:A1992HN47700013 ER PT J AU RICKMAN, JM VINALS, J SEKERKA, RF MULLINS, WW AF RICKMAN, JM VINALS, J SEKERKA, RF MULLINS, WW TI EFFECTS OF LONG-RANGE CRYSTALLINE ORDER ON COLLECTIVE DIFFUSION IN BINARY SOLIDS SO PHYSICAL REVIEW B LA English DT Article ID SIMULATION AB We examine in quantitative detail the effects of long-range crystalline order on the collective diffusion of an interstitial species that is dissolved in a coherent, binary hard-sphere crystal. A linear constitutive law relating the flux of diffusing interstitials to the chemical driving force for diffusion is derived within the framework of linear response theory. We use this law to argue that, by contrast with tracer diffusion, collective diffusion in coherent, deformable crystalline solids may be spatially nonlocal (i.e., non-Fickian) in some instances due to effective elastic interactions among the diffusing interstitials. We demonstrate this by performing a molecular-dynamics simulation of interstitial diffusion in a binary hard-sphere crystal. A diffusion response function as a function of orientation in reciprocal space is calculated from the simulation. We find that the limit of the diffusion response function as the wave vector tends to zero remains a function of orientation in reciprocal space, implying that the equation that describes the diffusion of the interstitial species is spatially nonlocal. Our results are consistent with earlier predictions by Cahn concerning the effects of compositional strain on collective diffusion in coherent crystalline solids. C1 ARGONNE NATL LAB, DIV MAT SCI, ARGONNE, IL 60439 USA. FLORIDA STATE UNIV, SUPERCOMP COMPUTAT RES INST, TALLAHASSEE, FL 32306 USA. CARNEGIE MELLON UNIV, DEPT PHYS, PITTSBURGH, PA 15213 USA. CARNEGIE MELLON UNIV, DEPT MATH, PITTSBURGH, PA 15213 USA. CARNEGIE MELLON UNIV, DEPT MET & MAT SCI, PITTSBURGH, PA 15213 USA. RP UNIV MICHIGAN, DEPT MAT SCI & ENGN, ANN ARBOR, MI 48109 USA. RI Vinals, Jorge/J-6198-2016 OI Vinals, Jorge/0000-0002-9361-0646 NR 24 TC 4 Z9 4 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 APR 1 PY 1992 VL 45 IS 14 BP 7750 EP 7761 DI 10.1103/PhysRevB.45.7750 PG 12 WC Physics, Condensed Matter SC Physics GA HN477 UT WOS:A1992HN47700016 ER PT J AU GARNER, J SPANBAUER, M BENEDEK, R STRANDBURG, KJ WRIGHT, S PLASSMANN, P AF GARNER, J SPANBAUER, M BENEDEK, R STRANDBURG, KJ WRIGHT, S PLASSMANN, P TI CRITICAL FIELDS OF JOSEPHSON-COUPLED SUPERCONDUCTING MULTILAYERS SO PHYSICAL REVIEW B LA English DT Article ID GINZBURG-LANDAU EQUATIONS; HIGH-TC SUPERCONDUCTORS; LAYERED SUPERCONDUCTORS; II SUPERCONDUCTORS AB The lattice-gauge representation of the Ginzburg-Landau free-energy functional introduced by Doria, Gubernatis, and Rainer is generalized to treat Josephson-coupled superconductor-insulator multilayer materials. Numerical calculations are performed for an applied field parallel to the layers, primarily for kappa = 5. Results are presented for the upper and lower critical fields as well as the slope of the magnetization at the upper critical field. The calculations for the lower critical field are compared with the recent analytical formulation of Clem and Coffey and Clem, Coffey, and Hao. No previous prediction is available for the slope of the magnetization curve in a layered system. C1 BRADLEY UNIV,DEPT PHYS,PEORIA,IL 61625. NORTHWESTERN UNIV,DEPT PHYS,EVANSTON,IL 60208. ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439. RP GARNER, J (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 25 TC 8 Z9 8 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 14 BP 7973 EP 7983 DI 10.1103/PhysRevB.45.7973 PG 11 WC Physics, Condensed Matter SC Physics GA HN477 UT WOS:A1992HN47700038 ER PT J AU ROMANO, LT SMITH, MG OESTERREICHER, H TAYLOR, RD AF ROMANO, LT SMITH, MG OESTERREICHER, H TAYLOR, RD TI TRANSMISSION-ELECTRON-MICROSCOPY STUDY OF THE TRANSITION FROM TETRAGONAL TO ORTHORHOMBIC YBA2(CU1-XFEX)3O6+Y SO PHYSICAL REVIEW B LA English DT Article ID SUPERCONDUCTING PROPERTIES; THERMAL TREATMENTS; TC AB We report on the difference in microstructure of conventionally prepared YBa2(Cu1-xFex)3O6+y (x = 0.06 and 0.10) compared to materials that have been cooled under N2 (reducing atmosphere preparation) and subsequently reoxygenated near 350-degrees-C. The microstructure of conventionally prepared tetragonal materials shows a complex structure (with small-scale orthogonal striations). Materials prepared under reducing conditions, however, are orthorhombic and show a microstructure that is a mixture of a twin structure and a structure with small-scale striations of order 100 angstrom only along the [110] direction, of which about every sixth appears to be supporting a twin boundary. This can be related to Mossbauer evidence for the formation of extended Fe-O clusters. We propose that the ordered striations in the Cu(1) plane are regions of Fe enrichments. This dilutes Fe from the matrix and leaves T(c) relatively unaffected, compared with the parent compound. C1 UNIV TEXAS,CTR MAT SCI & ENGN,AUSTIN,TX 78712. UNIV CALIF LOS ALAMOS SCI LAB,DIV PHYS,LOS ALAMOS,NM 87545. UNIV CALIF SAN DIEGO,DEPT CHEM,LA JOLLA,CA 92093. RP ROMANO, LT (reprint author), UNIV OXFORD,DEPT MAT,PARKS RD,OXFORD OX1 3PH,ENGLAND. NR 15 TC 13 Z9 13 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 14 BP 8042 EP 8045 DI 10.1103/PhysRevB.45.8042 PG 4 WC Physics, Condensed Matter SC Physics GA HN477 UT WOS:A1992HN47700047 ER PT J AU LOONG, CK VASHISHTA, P KALIA, RK JIN, W DEGANI, MH HINKS, DG PRICE, DL JORGENSEN, JD DABROWSKI, B MITCHELL, AW RICHARDS, DR ZHENG, Y AF LOONG, CK VASHISHTA, P KALIA, RK JIN, W DEGANI, MH HINKS, DG PRICE, DL JORGENSEN, JD DABROWSKI, B MITCHELL, AW RICHARDS, DR ZHENG, Y TI PHONON DENSITY OF STATES AND OXYGEN-ISOTOPE EFFECT IN BA1-XKXBIO3 SO PHYSICAL REVIEW B LA English DT Article ID MOLECULAR-DYNAMICS; SUPERCONDUCTING BA1-XKXBIO3; STRUCTURAL CORRELATIONS; TUNNELING SPECTROSCOPY; SILICON MICROCLUSTERS; ENERGY-GAP; SYSTEM; BA0.6K0.4BIO3; TEMPERATURE AB The phonon densities of states (DOS) of insulating BaBiO3 and superconducting Ba0.6K0.4BiO3 and the variation of the phonon spectrum of the superconducting compound upon oxygen-isotope (O-16, O-18) substitution are determined by inelastic neutron scattering (INS) and molecular-dynamics (MD) simulations. The MD simulations are carried out with an effective interaction potential which includes steric effects, Coulomb interactions, and the charge-dipole interactions due to the electronic polarizability of O2-. The MD results are in good agreement with the INS experiments and electron-tunneling measurements. Partial DOS of Ba, K, Bi, and O in BaBiO3 and Ba0.6K0.4BiO3 are also determined from MD simulations. In the superconducting material, the phonon spectrum softens and is comprised of broad bands around 15, 30, and 60 meV. The partial DOS reveal that phonons above 20 meV are due to oxygen vibrations, whereas phonons below 20 meV are due to Ba, K, and Bi. The reference oxygen-isotope-effect exponent, alpha(Or) = - partial derivative 1n/partial derivative 1nM(o), of Ba0.6K0.4BiO3 is determined to be alpha(Or) = 0.42 +/- 0.05 from the mass (M(o)) variation of the first moment of the phonon DOS, O-16 and O-18. This value is close to the oxygen-isotope-effect exponent, alpha(o), determined from the variation of T(c) (0.41 +/- 0.03 by Hinks et al. and 0.35 +/- 0.05 by Kondoh et al.), indicating that Ba0.6K0.4BiO3 is a weak- to moderate-coupling BCS-like superconductor and that the high T(c) (approximately 30 K) results from large electron-phonon matrix elements involving high-energy oxygen-related phonons. C1 LOUISIANA STATE UNIV,CONCURRENT COMP LAB MAT SIMULAT,BATON ROUGE,LA 70803. LOUISIANA STATE UNIV,DEPT PHYS & ASTRON,BATON ROUGE,LA 70803. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. UNIV SAO PAULO,INST FIS & QUIM SAO CARLOS,BR-13560 SAO CARLOS,SP,BRAZIL. RP LOONG, CK (reprint author), ARGONNE NATL LAB,INTENSE PULSED NEUTRON SOURCE,ARGONNE,IL 60439, USA. RI Price, David Long/A-8468-2013 NR 67 TC 42 Z9 42 U1 0 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD APR 1 PY 1992 VL 45 IS 14 BP 8052 EP 8064 DI 10.1103/PhysRevB.45.8052 PG 13 WC Physics, Condensed Matter SC Physics GA HN477 UT WOS:A1992HN47700049 ER PT J AU MANTICA, PF ZIMMERMAN, BE WALTERS, WB RIKOVSKA, J STONE, NJ AF MANTICA, PF ZIMMERMAN, BE WALTERS, WB RIKOVSKA, J STONE, NJ TI LEVEL STRUCTURE OF XE-126 - POPULATION OF LOW-SPIN LEVELS IN THE DECAY OF 1+ CS-126 AND THEORETICAL DESCRIPTION OF ADJACENT EVEN-EVEN XE NUCLIDES SO PHYSICAL REVIEW C LA English DT Article ID INTERACTING BOSON MODEL; O(6)-LIKE NUCLEI; INTRUDER STATES; REGION; BA; DEFORMATION; TRIAXIALITY; INTERPLAY; ISOTOPES; PROTON AB The low-spin structure of Xe-126 has been investigated following the decay of 1.6-min 1+ Cs-126. Gamma-ray singles, gamma-gamma coincidences, and conversion-electron spectra have been measured. Several new levels have been identified and some new spins and parities have been suggested. The structure of Xe-126 and adjacent Xe nuclides has been investigated through interacting boson model-2 (IBM-2) calculations. The results of these calculations are discussed along with a number of other calculations of the structure of even-even Xe nuclides. Both these IBM-2 calculations and the total Routhian surface calculations suggest notable changes in structure for Xe-130. C1 OAK RIDGE ASSOCIATED UNIV,UNISOR,OAK RIDGE,TN 37831. UNIV OXFORD,CLARENDON LAB,OXFORD OX1 3PU,ENGLAND. RP MANTICA, PF (reprint author), UNIV MARYLAND,DEPT CHEM & BIOCHEM,COLLEGE PK,MD 20742, USA. NR 41 TC 18 Z9 18 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD APR PY 1992 VL 45 IS 4 BP 1586 EP 1596 DI 10.1103/PhysRevC.45.1586 PG 11 WC Physics, Nuclear SC Physics GA HN248 UT WOS:A1992HN24800020 ER PT J AU WALKIEWICZ, TA RAMAN, S JURNEY, ET STARNER, JW LYNN, JE AF WALKIEWICZ, TA RAMAN, S JURNEY, ET STARNER, JW LYNN, JE TI THERMAL-NEUTRON CAPTURE BY MAGNESIUM ISOTOPES SO PHYSICAL REVIEW C LA English DT Article ID GAMMA-RAYS; MG-26 AB We have studied the primary and secondary gamma-rays (33 in Mg-25, 212 in Mg-26, and 35 in Mg-27) following thermal-neutron capture by the stable Mg-24, Mg-25, and Mg-26 isotopes. Almost all of these gamma-rays have been incorporated into the corresponding level schemes consisting of 9 excited levels in Mg-25, 55 in Mg-26, and 10 in Mg-27. In each case, the observed gamma-rays account for nearly 100% of all captures. The measured neutron separation energies for Mg-25, Mg-26, and Mg-27 are, respectively, 7330.65 +/- 0.05, 11 093.18 +/- 0.05, and 6443.40 +/- 0.05 keV. The measured thermal-neutron capture cross sections for Mg-24, Mg-25, and Mg-26 are, respectively, 54.1 +/- 1.3, 200 +/- 3, and 39.0 +/- 0.8 mb. In all three cases, primary electric-dipole (E1) transitions account for the bulk of the total capture cross section. We have calculated these E1 partial cross sections using direct-capture theory. We have also speculated on the mechanism responsible for the magnetic-dipole (M1) transitions which are quite strong in Mg-26. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. NR 34 TC 36 Z9 36 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 APR PY 1992 VL 45 IS 4 BP 1597 EP 1608 DI 10.1103/PhysRevC.45.1597 PG 12 WC Physics, Nuclear SC Physics GA HN248 UT WOS:A1992HN24800021 ER PT J AU CHINN, CR BERGER, JF GOGNY, D WEISS, MS AF CHINN, CR BERGER, JF GOGNY, D WEISS, MS TI LIMITS ON THE LIFETIME OF THE SHAPE ISOMER OF U-238 SO PHYSICAL REVIEW C LA English DT Article ID HARTREE-FOCK; ISOTOPES AB A theoretical calculation of the partial lifetime of the fission isomer in U-238 decaying via electric quadrupole radiation to the lowest 2+ state is presented and compared to experiment. This is a fully microscopic nuclear structure calculation using the constrained Hartree-Fock-Bogoliubov method, where the only input is the finite-ranged D1S interaction. The low-lying collective states are obtained via the Gaussian overlap approximation of the generator coordinate method. Rotational symmetry is restored within the rotor approximation. The computation of the transition rates provides an upper limit on the gamma-decay lifetime of the isomer, since only axial quadrupole deformations are considered. C1 CTR ETUD BRUYERES LE CHATEL,SERV PHYS NEUTRON & NUCL,F-91680 BRUYERES CHATEL,FRANCE. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT PHYS,LIVERMORE,CA 94550. CEA,CESTA,F-33114 LE BARP,FRANCE. NR 26 TC 21 Z9 21 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD APR PY 1992 VL 45 IS 4 BP 1700 EP 1708 DI 10.1103/PhysRevC.45.1700 PG 9 WC Physics, Nuclear SC Physics GA HN248 UT WOS:A1992HN24800032 ER PT J AU BUSH, BW BERTSCH, GF BROWN, BA AF BUSH, BW BERTSCH, GF BROWN, BA TI SHAPE DIFFUSION IN THE SHELL-MODEL SO PHYSICAL REVIEW C LA English DT Article ID GIANT-DIPOLE RESONANCE; NUCLEAR DISSIPATION; NEUTRON EMISSION; ONE-BODY; FISSION; FLUCTUATIONS; SCATTERING AB The diffusion coefficient for quadrupolar shape changes is derived in a model based on the mixing of static Hartree-Fock configurations by the residual interaction. The model correctly predicts the width of single-particle configurations. We find a diffusion rate depending on temperature as T3, consistent with at least one other theoretical estimate. However, our diffusion rate is an order of magnitude lower than two values extracted from data. C1 MICHIGAN STATE UNIV,CYCLOTRON LAB,E LANSING,MI 48824. MICHIGAN STATE UNIV,DEPT PHYS,E LANSING,MI 48824. RP BUSH, BW (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. OI Bush, Brian/0000-0003-2864-7028 NR 36 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 APR PY 1992 VL 45 IS 4 BP 1709 EP 1719 DI 10.1103/PhysRevC.45.1709 PG 11 WC Physics, Nuclear SC Physics GA HN248 UT WOS:A1992HN24800033 ER PT J AU CHOU, WT WARBURTON, EK AF CHOU, WT WARBURTON, EK TI CONSTRUCTION OF SHELL-MODEL INTERACTIONS FOR Z-GREATER-THAN-OR-EQUAL-TO-50, N-GREATER-THAN-OR-EQUAL-TO-82 NUCLEI - PREDICTIONS FOR A=133-134 BETA-DECAYS SO PHYSICAL REVIEW C LA English DT Article AB Two shell-model interactions are constructed in the model space of the five proton and six neutron orbits just above the double shell closure at Sn132. One interaction uses the two-body matrix elements calculated by Kuo and Herling for use near Pb-208. For the other, the proton-proton two-body matrix elements are replaced with effective ones of Kruse and Wildenthal and selected proton-neutron matrix elements were varied in order to better reproduce the known energy spectra of Sb134. The main difficulty in this construction is the determination of the neutron single-particle energies. This determination was done by comparison of theoretical and experimental (d,p) spectroscopic factors for the N = 83, Z = 54, 56, and 58 isotones. The DELTA-J not-equal 0 first-forbidden beta- decays of Sn133(7/2-), 134Sn(0+), 134Sb(0-), and 134Sb(7-) were considered in order to exemplify the application of these interactions. C1 CLARK UNIV,WORCESTER,MA 01610. RP CHOU, WT (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 25 TC 37 Z9 37 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 APR PY 1992 VL 45 IS 4 BP 1720 EP 1729 DI 10.1103/PhysRevC.45.1720 PG 10 WC Physics, Nuclear SC Physics GA HN248 UT WOS:A1992HN24800034 ER PT J AU HARVEY, BG AF HARVEY, BG TI BEAM-VELOCITY FRAGMENT YIELDS AND MOMENTA IN NUCLEUS-NUCLEUS COLLISIONS FROM 20 MEV NUCLEON TO 200 GEV NUCLEON SO PHYSICAL REVIEW C LA English DT Article ID HADRONIC COLLISIONS; CROSS-SECTIONS; DECAY; EMISSION; PROTONS; AU-197 AB New measurements of beam-velocity fragment yields from O-16 projectiles at energies of 50 and 70 MeV/nucleon show that the yields of fragments with Z > 1 are remarkably independent of beam energy from 20 MeV/nucleon to 200 GeV/nucleon. The yields of H-2 + H-3 increase by a factor of only 1.7 between 50 and 2000 MeV/nucleon. Statistical decay of primary fragments accounts reasonably well for the measured fragment and coincidence channel cross sections, and for the fragment momentum distributions from O-16 projectiles at energies from 70 MeV/nucleon to 200 GeV/nucleon and from C-12 projectiles at 2 GeV/nucleon. RP HARVEY, BG (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720, USA. NR 22 TC 6 Z9 6 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 APR PY 1992 VL 45 IS 4 BP 1748 EP 1756 DI 10.1103/PhysRevC.45.1748 PG 9 WC Physics, Nuclear SC Physics GA HN248 UT WOS:A1992HN24800037 ER PT J AU VINEYARD, MF BAUER, JS CRUM, JF GOSDIN, CH TROTTER, RS KOVAR, DG BECK, C HENDERSON, DJ JANSSENS, RVF WILKINS, BD MAGUIRE, CF MATEJA, JF PROSSER, FW STEPHANS, GSF AF VINEYARD, MF BAUER, JS CRUM, JF GOSDIN, CH TROTTER, RS KOVAR, DG BECK, C HENDERSON, DJ JANSSENS, RVF WILKINS, BD MAGUIRE, CF MATEJA, JF PROSSER, FW STEPHANS, GSF TI FUSION EVAPORATION-RESIDUE CROSS-SECTIONS FOR SI-28+CA-40 AT E(SI-28)=309, 397, AND 452 MEV SO PHYSICAL REVIEW C LA English DT Article ID SURFACE-BARRIER DETECTORS; ASYMMETRIC FISSION; INCOMPLETE FUSION; HEAVY-IONS; NI-56; MODEL; NUCLEON; DECAY; ONSET AB Velocity distributions of mass-identified evaporation residues produced in the Si-28 + Ca-40 reaction have been measured at bombarding energies of 309, 397, and 452 MeV using time-of-flight techniques. These distributions were used to identify evaporation residues and to separate the complete-fusion and incomplete-fusion components. Angular distributions and upper limits for the total evaporation-residue and complete-fusion evaporation-residue cross sections were extracted at all three bombarding energies. The complete-fusion evaporation-residue cross sections and the deduced critical angular momenta are compared with earlier measurements and the predictions of existing models. The ratios of the complete-fusion evaporation-residue cross section to the total evaporation-residue cross section, along with those measured for the Si-28 + C-12 and Si-28 + Si-28 systems at the same energies, support the entrance-channel mass-asymmetry dependence of the incomplete-fusion evaporation-residue process reported earlier. C1 ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439. VANDERBILT UNIV,DEPT PHYS & ASTRON,NASHVILLE,TN 37235. ARGONNE NATL LAB,DIV EDUC PROGRAMS,ARGONNE,IL 60439. UNIV KANSAS,DEPT PHYS,LAWRENCE,KS 66045. MIT,NUCL SCI LAB,CAMBRIDGE,MA 02139. RP VINEYARD, MF (reprint author), UNIV RICHMOND,DEPT PHYS,RICHMOND,VA 23173, USA. NR 23 TC 23 Z9 23 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 APR PY 1992 VL 45 IS 4 BP 1784 EP 1790 DI 10.1103/PhysRevC.45.1784 PG 7 WC Physics, Nuclear SC Physics GA HN248 UT WOS:A1992HN24800040 ER PT J AU PARK, BK RAPAPORT, J ULLMANN, JL LING, AG SORENSON, DS BRADY, FP ROMERO, JL HOWELL, CR TORNOW, W RONNQVIST, CT AF PARK, BK RAPAPORT, J ULLMANN, JL LING, AG SORENSON, DS BRADY, FP ROMERO, JL HOWELL, CR TORNOW, W RONNQVIST, CT TI GAMOW-TELLER AND DIPOLE STRENGTH DISTRIBUTION IN CA-40(N,P)K-40 REACTION SO PHYSICAL REVIEW C LA English DT Article ID INELASTIC ELECTRON-SCATTERING; OPTICAL-MODEL ANALYSIS; SPIN-DIPOLE; GIANT-RESONANCES; SHELL NUCLEI; MEAN FIELD; BETA-DECAY; CA-40; EXCITATIONS; APPROXIMATION AB Double differential cross-section angular distributions covering 0-degrees less-than-or-equal-to theta(lab) less-than-or-equal-to 40-degrees have been measured for the Ca-40(n,p)K-40 charge exchange reaction. With the white neutron source at LAMPF-WNR, we were able to study not only the angular distribution but also the energy dependence of this charge exchange reaction covering simultaneously incident neutron energies between 60 and 260 MeV. The identification of Gamow-Teller (GT) transitions and L = 1 dipole resonance was carried out using a multipole decomposition technique. The empirically deduced GT strength in the Ca-40(n,p)K-40 reaction evaluated up to 15 MeV excitation energy is compared to theoretical values. We have used a simple one-particle-one-hole shell model calculation to study the excitation of the giant dipole resonance and the giant spin-dipole resonance, which are compared with empirical results. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87544. UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616. DUKE UNIV,DEPT PHYS,DURHAM,NC 27706. TRIANGLE UNIV NUCL LAB,DURHAM,NC 27706. UNIV UPPSALA,DEPT NEUTRON RES,S-75105 UPPSALA,SWEDEN. RP PARK, BK (reprint author), OHIO UNIV,DEPT PHYS,ATHENS,OH 45701, USA. NR 56 TC 18 Z9 18 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 APR PY 1992 VL 45 IS 4 BP 1791 EP 1802 DI 10.1103/PhysRevC.45.1791 PG 12 WC Physics, Nuclear SC Physics GA HN248 UT WOS:A1992HN24800041 ER PT J AU COMER, LM REBER, EL KEMPER, KW ROBSON, D BROWN, JD TALLEY, TL AF COMER, LM REBER, EL KEMPER, KW ROBSON, D BROWN, JD TALLEY, TL TI SURVEY OF THE (BE-9,HE-6) REACTION ON BE-9, B-10, B-11, AND C-12 SO PHYSICAL REVIEW C LA English DT Article ID ELASTIC-SCATTERING; POTENTIALS AB Elastic scattering and (Be-9,He-6) reaction data have been taken at a Be-9 bombarding energy of 40 MeV. The reaction data are consistent with (Be-9,He-6) being a direct He-3 cluster transfer, so that population of T> = 3/2 final states from T = 0 targets is unlikely. Contributions to the elastic scattering arising from the identity of the target and projectile have been calculated. Large deviations from standard optical model calculations do not occur until scattering angles are larger than 90-degrees c.m. C1 PRINCETON UNIV,JOSEPH HENRY LABS,PRINCETON,NJ 08544. UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP COMER, LM (reprint author), FLORIDA STATE UNIV,DEPT PHYS,TALLAHASSEE,FL 32306, USA. NR 19 TC 6 Z9 6 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 APR PY 1992 VL 45 IS 4 BP 1803 EP 1809 DI 10.1103/PhysRevC.45.1803 PG 7 WC Physics, Nuclear SC Physics GA HN248 UT WOS:A1992HN24800042 ER PT J AU LEE, TSH MILLER, GA AF LEE, TSH MILLER, GA TI COLOR TRANSPARENCY AND HIGH-ENERGY (P,2P) NUCLEAR-REACTIONS SO PHYSICAL REVIEW C LA English DT Article ID IMPULSE-APPROXIMATION CALCULATIONS; ELASTIC-SCATTERING; QCD AB Predictions relevant for exploring color transparency in (p,2p) nuclear reactions are often made by using simplified treatments of nuclear dynamics. We examine the extent to which the earlier predictions are valid by carrying out calculations using an improved treatment of the proton scattering wave functions, nucleon Fermi motion, and the effects of long- and short-range nuclear correlations. The consequences of two existing models of color transparency are also presented. C1 UNIV WASHINGTON,DEPT PHYS FM15,SEATTLE,WA 98195. RP LEE, TSH (reprint author), ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439, USA. NR 37 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 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD APR PY 1992 VL 45 IS 4 BP 1863 EP 1870 DI 10.1103/PhysRevC.45.1863 PG 8 WC Physics, Nuclear SC Physics GA HN248 UT WOS:A1992HN24800050 ER PT J AU SATCHLER, GR SINGHAM, MK JOHNSON, MB AF SATCHLER, GR SINGHAM, MK JOHNSON, MB TI PION-SCATTERING FROM K-39 AND NI-58 AND VIRTUAL EXCITATION EFFECTS ON ELASTIC-SCATTERING - COMMENT SO PHYSICAL REVIEW C LA English DT Note ID COUPLED-CHANNELS CALCULATIONS; NUCLEI AB We comment on a recent paper from Zhang Yu-shun in which it is claimed that virtual excitation of low vibrational states has strong effects on the elastic scattering of pions. We find a substantially weaker influence of these excitations, using fully coupled-channels calculations with both phenomenological and microscopic models for the interaction. Further, higher-order effects on the inelastic cross sections are also weak for typical vibrational nuclei. C1 CASE WESTERN RESERVE UNIV,DEPT PHYS,CLEVELAND,OH 44106. UNIV CALIF LOS ALAMOS SCI LAB,DIV MEDIUM ENERGY PHYS,LOS ALAMOS,NM 87545. RP SATCHLER, GR (reprint author), OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831, USA. NR 15 TC 0 Z9 0 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD APR PY 1992 VL 45 IS 4 BP 2027 EP 2029 DI 10.1103/PhysRevC.45.2027 PG 3 WC Physics, Nuclear SC Physics GA HN248 UT WOS:A1992HN24800069 ER PT J AU BARRETT, BR CASTEN, RF GINOCCHIO, JN SELIGMAN, T WEIDENMULLER, HA AF BARRETT, BR CASTEN, RF GINOCCHIO, JN SELIGMAN, T WEIDENMULLER, HA TI IS THERE INCOMPLETE MIXING OF STATES WITH DIFFERENT K-QUANTUM NUMBERS IN THE NEUTRON RESONANCE REGION SO PHYSICAL REVIEW C LA English DT Note ID FLUCTUATION PROPERTIES AB A recent publication claimed incomplete mixing of states with different K quantum numbers in the neutron resonance region. We discuss the theoretical implications of such a claim and show that it leads to serious discrepancies with the statistical model. We, therefore, reexamine the experimental data on which such a claim is based. The totality of the evidence invalidates the claim that K mixing in the resonance region is incomplete. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545. UNIV AUTONOMA MEXICO,DEPT PHYS,GUEMAVACA,MEXICO. MAX PLANCK INST NUCL PHYS,W-6900 HEIDELBERG 1,GERMANY. RP BARRETT, BR (reprint author), UNIV ARIZONA,DEPT PHYS,TUCSON,AZ 85719, USA. NR 19 TC 14 Z9 14 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD APR PY 1992 VL 45 IS 4 BP R1417 EP R1419 PG 3 WC Physics, Nuclear SC Physics GA HN248 UT WOS:A1992HN24800002 ER PT J AU CASTEN, RF ZAMFIR, NV VONBRENTANO, P CHOU, WT AF CASTEN, RF ZAMFIR, NV VONBRENTANO, P CHOU, WT TI IDENTICAL BANDS IN WIDELY DISPERSED NUCLEI SO PHYSICAL REVIEW C LA English DT Note ID F-SPIN MULTIPLETS AB Low spin identical bands are found in sets of widely dispersed nuclei, spanning as much as 24 mass units. Moreover, they occur in regions of rapid structural and shape changes. A correlation ansatz to identify such nuclei, based on the concepts of N(p)N(n) and F spin, is discussed. C1 UNIV COLOGNE,INST KERNPHYS,W-5000 COLOGNE 41,GERMANY. INST ATOM PHYS,BUCHAREST,ROMANIA. CLARK UNIV,WORCESTER,MA 01610. RP CASTEN, RF (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. RI Zamfir, Nicolae Victor/F-2544-2011 NR 17 TC 47 Z9 47 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 APR PY 1992 VL 45 IS 4 BP R1413 EP R1416 PG 4 WC Physics, Nuclear SC Physics GA HN248 UT WOS:A1992HN24800001 ER PT J AU COFFMAN, D DEJONGH, F DUBOIS, GP EIGEN, G HITLIN, DG MATTHEWS, CG MINCER, A RICHMAN, J WEINSTEIN, AJ WISNIEWSKI, WJ ZHU, Y BOLTON, T BUNNELL, KO CASSELL, RE COWARD, DH KIM, PC LABS, J ODIAN, A PITMAN, D SCHINDLER, RH TOKI, W WASSERBAECH, S DRINKARD, JJ GATTO, C HEUSCH, CA LOCKMAN, WS SCARLATELLA, M SADROZINSKI, HFW SCHALK, TL SEIDEN, A WESELER, S EISENSTEIN, BI FREESE, T GLADDING, G IZEN, JM STOCKDALE, IE TRIPSAS, B MALLIK, U WANG, MZ BROWN, J BURNETT, TH LI, AD MIR, R MOCKETT, PM NEMATI, B PARRISH, L WILLUTZKI, H AF COFFMAN, D DEJONGH, F DUBOIS, GP EIGEN, G HITLIN, DG MATTHEWS, CG MINCER, A RICHMAN, J WEINSTEIN, AJ WISNIEWSKI, WJ ZHU, Y BOLTON, T BUNNELL, KO CASSELL, RE COWARD, DH KIM, PC LABS, J ODIAN, A PITMAN, D SCHINDLER, RH TOKI, W WASSERBAECH, S DRINKARD, JJ GATTO, C HEUSCH, CA LOCKMAN, WS SCARLATELLA, M SADROZINSKI, HFW SCHALK, TL SEIDEN, A WESELER, S EISENSTEIN, BI FREESE, T GLADDING, G IZEN, JM STOCKDALE, IE TRIPSAS, B MALLIK, U WANG, MZ BROWN, J BURNETT, TH LI, AD MIR, R MOCKETT, PM NEMATI, B PARRISH, L WILLUTZKI, H TI RESONANT SUBSTRUCTURE IN KBAR-PI-PI-PI DECAYS OF D-MESONS SO PHYSICAL REVIEW D LA English DT Article ID BRANCHING FRACTIONS; LEPTONIC DECAYS; D+/ DECAYS; ENERGY; DS+/ AB We determine the resonant substructure of D --> K-pi-pi-piBAR decays, extracting the relative fractions and phases of the amplitudes contributing to the K- pi+pi+pi-, K0BAR pi+pi+pi-, K- pi+pi+pi(0), and K0BAR pi+pi-pi(0) final states. We find that two-body decay modes account for at least 75% of these decays. We obtain branching ratios for D --> Ka1BAR (1260), D --> K*BAR rho, D --> K1BAR (1270)pi, D --> K1BAR (1400)pi, and D0 --> K0omegaBAR decay modes, as well as for several three- and four-body decay modes. In the case of D --> Ka1BAR (1260) and D --> K*BAR rho, we obtain the branching ratios for all three possible isospin combinations, enabling us to extract the isospin-1/2 and -3/2 amplitudes, and their relative phases. We find that the isospin-3/2 amplitudes are suppressed relative to the isospin-1/2 amplitudes. This implies that the widths of the D+ modes are suppressed relative to those of the D0, confirming that an understanding of the lifetime difference of the D0 and D+ depends on an understanding of two-body hadronic decays. For the D --> K*BAR rho decay modes, we obtain detailed information on the polarization of the K*BAR and rho. This enables us to place constraints on the form factors for D --> K*BAR and D --> rho-transitions. A comparison of our results on D --> K*BAR rho decays with recent results on semileptonic decays allows us to test the factorization hypothesis. C1 CALTECH,PASADENA,CA 91125. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305. UNIV CALIF SANTA CRUZ,SANTA CRUZ,CA 95064. UNIV ILLINOIS,URBANA,IL 61801. UNIV IOWA,IOWA CITY,IA 52242. UNIV WASHINGTON,SEATTLE,WA 98195. NR 35 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 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD APR 1 PY 1992 VL 45 IS 7 BP 2196 EP 2211 DI 10.1103/PhysRevD.45.2196 PG 16 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HK953 UT WOS:A1992HK95300006 ER PT J AU ADERHOLZ, M AGGARWAL, MM AKBARI, H ALLPORT, PP BADYAL, SK BALLAGH, HC BARTH, M BATON, JP BINGHAM, HH BRUCKER, EB BURNSTEIN, RA CAMPBELL, JR CENCE, RJ CHATTERJEE, TK CLAYTON, EF CORRIGAN, G COUTURES, C DEPROSPO, D DEVANAND DEWOLF, EA FAULKNER, PJW FOETH, H FRETTER, WB GUPTA, VK HANLON, J HARIGEL, G HARRIS, FA JABIOL, MA JACQUES, P JAIN, V JONES, GT JONES, MD KAFKA, T KALELKAR, M KASPER, P KOHLI, JM KOLLER, EL KRAWIEC, RJ LAUKO, M LYS, JE MARAGE, P MILBURN, RH MILLER, DB MITTRA, IS MOBAYYEN, MM MOREELS, J MORRISON, DRO MYATT, G NAILOR, P NAON, R NAPIER, A NEVEU, M PASSMORE, D PETERS, MW PETERSON, VZ PLANO, R RAO, NK RUBIN, HA SACTON, J SAMBYAL, SS SCHMITZ, N SCHNEPS, J SINGH, JB SMART, W STAMER, P VARVELL, KE VERLUYTEN, L WACHSMUTH, H WAINSTEIN, S WILLOCQ, S YOST, GP AF ADERHOLZ, M AGGARWAL, MM AKBARI, H ALLPORT, PP BADYAL, SK BALLAGH, HC BARTH, M BATON, JP BINGHAM, HH BRUCKER, EB BURNSTEIN, RA CAMPBELL, JR CENCE, RJ CHATTERJEE, TK CLAYTON, EF CORRIGAN, G COUTURES, C DEPROSPO, D DEVANAND DEWOLF, EA FAULKNER, PJW FOETH, H FRETTER, WB GUPTA, VK HANLON, J HARIGEL, G HARRIS, FA JABIOL, MA JACQUES, P JAIN, V JONES, GT JONES, MD KAFKA, T KALELKAR, M KASPER, P KOHLI, JM KOLLER, EL KRAWIEC, RJ LAUKO, M LYS, JE MARAGE, P MILBURN, RH MILLER, DB MITTRA, IS MOBAYYEN, MM MOREELS, J MORRISON, DRO MYATT, G NAILOR, P NAON, R NAPIER, A NEVEU, M PASSMORE, D PETERS, MW PETERSON, VZ PLANO, R RAO, NK RUBIN, HA SACTON, J SAMBYAL, SS SCHMITZ, N SCHNEPS, J SINGH, JB SMART, W STAMER, P VARVELL, KE VERLUYTEN, L WACHSMUTH, H WAINSTEIN, S WILLOCQ, S YOST, GP TI STUDY OF HIGH-ENERGY NEUTRINO NEUTRAL-CURRENT INTERACTIONS SO PHYSICAL REVIEW D LA English DT Article ID STANDARD MODEL; PARAMETERS; SCATTERING; BEAM AB From an exposure of the Fermilab 15-foot bubble chamber to the Tevatron quadrupole triplet neutrino beam, we have determined the ratio of neutral-current (NC) to charged-current (CC) interactions to be 0.288 +/- 0.032 for events with visible hadron momentum above 10 GeV/c. The mean nu (nuBAR) event energy is 150 (110) GeV, which is higher than that for any previous beam. This result agrees with those from previous experiments at lower energies. The NC/CC ratio is derived for a combined sample of nu and nuBAR events. A value of 0.274 +/- 0.038 is obtained for the dominant nu-component assuming nuBAR NC/CC = 0.39 +/- 0.08. For events with visible hadron momentum above 25 GeV/c, where the neutral hadron contamination remaining in the NC sample is assumed to be negligible, the combined NC/CC is 0.323 +/- 0.025 and the K0 production rates are 0.375 +/- 0.064 per CC and 0.322 +/- 0.073 per NC event. The corresponding LAMBDA-rates are 0.161 +/- 0.030 per CC and 0.113 +/- 0.030 per NC event. The K0 and LAMBDA-distributions of the fractional hadron energy variable z in NC events are consistent with those in CC events. C1 UNIV JAMMU,JAMMU 180001,INDIA. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,LONDON SW7 2AZ,ENGLAND. PUNJAB UNIV,CHANDIGARH 160014,INDIA. CERN,CH-1211 GENEVA 23,SWITZERLAND. UNIV CALIF BERKELEY,BERKELEY,CA 94720. UNIV BIRMINGHAM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND. FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV HAWAII,HONOLULU,HI 96822. IIT,CHICAGO,IL 60616. RUTGERS STATE UNIV,NEW BRUNSWICK,NJ 08903. STEVENS INST TECHNOL LIB,HOBOKEN,NJ 07030. TUFTS UNIV,MEDFORD,MA 02155. INTERUNIV INST HIGH ENERGIES,B-1050 BRUSSELS,BELGIUM. UNIV OXFORD,DEPT NUCL PHYS,OXFORD OX1 3RH,ENGLAND. CENS,DEPT PHYS PARTICULES ELEMENTAIRES,F-91191 GIF SUR YVETTE,FRANCE. RP ADERHOLZ, M (reprint author), MAX PLANCK INST PHYS & ASTROPHYS,W-8000 MUNICH 40,GERMANY. NR 13 TC 5 Z9 5 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 APR 1 PY 1992 VL 45 IS 7 BP 2232 EP 2243 DI 10.1103/PhysRevD.45.2232 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HK953 UT WOS:A1992HK95300008 ER PT J AU SARMIENTO, M MOONEY, P BISHOP, JM BISWAS, N CASON, NM DAUWE, L GODFREY, J KENNEY, VP PEMPER, R ROJEK, E RUCHTI, RC SHEPHARD, WD EDELSTEIN, RM FORSYTH, CP GAMARNIK, K GINTHER, G KREYMER, AE LIPTON, R MCQUADE, JM POTTER, DM RUSS, JS SPIEGEL, L JOHNSON, DE BUCHHOLZ, D CREMALDI, L DELCHAMPS, SW MAO, HS ROSEN, JL SAKUMOTO, W SCHLUTER, RA SONTZ, SB WINTER, C AF SARMIENTO, M MOONEY, P BISHOP, JM BISWAS, N CASON, NM DAUWE, L GODFREY, J KENNEY, VP PEMPER, R ROJEK, E RUCHTI, RC SHEPHARD, WD EDELSTEIN, RM FORSYTH, CP GAMARNIK, K GINTHER, G KREYMER, AE LIPTON, R MCQUADE, JM POTTER, DM RUSS, JS SPIEGEL, L JOHNSON, DE BUCHHOLZ, D CREMALDI, L DELCHAMPS, SW MAO, HS ROSEN, JL SAKUMOTO, W SCHLUTER, RA SONTZ, SB WINTER, C TI INCLUSIVE NEUTRAL-D PRODUCTION IN 205-GEV/C PI-BE INTERACTIONS SO PHYSICAL REVIEW D LA English DT Article ID D-MESON PRODUCTION; PROMPT SINGLE MUONS; D-STAR PRODUCTION; PP INTERACTIONS; CHARM STATES; SEARCH AB Hadronic charm production was investigated with a two-arm magnetic spectrometer. The experiment was triggered on muons from the semileptonic decay of charm particles in one arm while reconstructing the mass of the associatively produced partners in the other arm. An excess of 153 +/- 46 combinations above background for the neutral D --> K-pi mode was observed. This corresponds to a model-dependent DDBAR production cross section of 41 +/- 12(-11)+15-mu-b per nucleon, where the first uncertainty is statistical and the second is systematic. C1 UNIV NOTRE DAME,NOTRE DAME,IN 46556. CARNEGIE MELLON UNIV,PITTSBURGH,PA 15213. FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. RP SARMIENTO, M (reprint author), NORTHWESTERN UNIV,EVANSTON,IL 60208, USA. RI Russ, James/P-3092-2014 OI Russ, James/0000-0001-9856-9155 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 APR 1 PY 1992 VL 45 IS 7 BP 2244 EP 2248 DI 10.1103/PhysRevD.45.2244 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HK953 UT WOS:A1992HK95300009 ER PT J AU ABE, F AMIDEI, D APOLLINARI, G ATAC, M AUCHINCLOSS, P BADEN, AR BACCHETTA, N BAILEY, MW BAMBERGER, A DEBARBARO, P BARNETT, BA BARBAROGALTIERI, A BARNES, VE BAUMANN, T BEDESCHI, F BEHRENDS, S BELFORTE, S BELLETTINI, G BELLINGER, J BENJAMIN, D BENSINGER, J BERETVAS, A BERGE, JP BERTOLUCCI, S BHADRA, S BINKLEY, M BLAIR, R BLOCKER, C BOLOGNESI, V BOOTH, AW BOSWELL, C BRANDENBURG, G BROWN, D BUCKLEYGEER, E BUDD, HS BUSETTO, G BYONWAGNER, A BYRUM, KL CAMPAGNARI, C CAMPBELL, M CANER, A CAREY, R CARITHERS, W CARLSMITH, D CARROLL, JT CASHMORE, R CASTRO, A CERVELLI, F CHADWICK, K CHIARELLI, G CHINOWSKY, W CIHANGIR, S CLARK, AG CONNOR, D CONTRERAS, M COOPER, J CORDELLI, M CRANE, D CURATOLO, M DAY, C DEJONGH, F DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DERWENT, PF DEVLIN, T DIBITONTO, D DICKSON, M DRUCKER, RB EINSWEILER, K ELIAS, JE ELY, R ENO, S ERREDE, S ESPOSITO, B FLAUGHER, B FOSTER, GW FRANKLIN, M FREEMAN, J FRISCH, H FUESS, T FUKUI, Y FUNAYAMA, Y GARFINKEL, AF GAUTHIER, A GEER, S GERDES, DW GIANNETTI, P GIOKARIS, N GIROMINI, P GLADNEY, L GOLD, M GOULIANOS, K GRASSMANN, H GROSSOPILCHER, C HABER, C HAHN, SR HANDLER, R HARA, K HARRIS, RM HAUSER, J HAWK, C HESSING, T HOLLEBEEK, R HOLLOWAY, L HU, P HUBBARD, B HUFFMAN, BT HUGHES, R HURST, P HUTH, J HYLEN, J INCAGLI, M INO, T ISO, H JENSEN, H JESSOP, CP JOHNSON, RP JOSHI, U KADEL, RW KAMON, T KANDA, S KARDELIS, DA KARLINER, I KEARNS, E KEEBLE, L KEPHART, R KESTEN, P KEUP, RM KEUTELIAN, H KIM, D KIM, S KIRSCH, L KONDO, K KONIGSBERG, J KOVACS, E KUHLMANN, SE KUNS, E LAASANEN, AT LAMOUREUX, JI LEONE, S LI, W LIMON, P LISS, TM LOCKYER, N LUCHINI, CB LUKENS, P MAAS, P MAESHIMA, K MANGANO, M MARRINER, JP MARIOTTI, M MARKELOFF, R MARKOSKY, LA MATTINGLY, R MCINTYRE, P MENZIONE, A MEYER, T MIKAMO, S MILLER, M MIMASHI, T MISCETTI, S MISHINA, M MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A NAKAE, LF NAKANO, I NELSON, C NEWMANHOLMES, C NG, JST NINOMIYA, M NODULMAN, L OGAWA, S PAOLETTI, R PARA, A PARE, E PARK, S PATRICK, J PHILLIPS, TJ PTOHOS, F PLUNKETT, R PONDROM, L PROUDFOOT, J PUNZI, G QUARRIE, D RAGAN, K REDLINGER, G RHOADES, J ROACH, M RIMONDI, F RISTORI, L ROHALY, T ROODMAN, A SAKUMOTO, WK SANSONI, A SARD, RD SAVOYNAVARRO, A SCARPINE, V SCHLABACH, P SCHMIDT, EE SCHNEIDER, O SCHUB, MH SCHWITTERS, R SCRIBANO, A SEGLER, S SEIYA, Y SEKIGUCHI, M SHAPIRO, M SHAW, NM SHEAFF, M SHOCHET, M SIEGRIST, J SINERVO, P SKARHA, J SLIWA, K SMITH, DA SNIDER, FD SONG, L SPAHN, M STDENIS, R STEFANINI, A SULLIVAN, G SWARTZ, RL TAKANO, M TARTARELLI, F TAKIKAWA, K TAREM, S THERIOT, D TIMKO, M TIPTON, P TKACZYK, S TOLLESTRUP, A TONNISON, J TRISCHUK, W TURINI, N TSAY, Y UKEGAWA, F UNDERWOOD, D VEJCIK, S VIDAL, R WAGNER, RG WAGNER, RL WAINER, N WALSH, J WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WHITE, SN WICKLUND, AB WILLIAMS, HH WINER, BL WYSS, J YAGIL, A YAMASHITA, A YASUOKA, K YEH, GP YOH, J YOKOYAMA, M YUN, JC ZANETTI, A ZETTI, F ZUCCHELLI, S AF ABE, F AMIDEI, D APOLLINARI, G ATAC, M AUCHINCLOSS, P BADEN, AR BACCHETTA, N BAILEY, MW BAMBERGER, A DEBARBARO, P BARNETT, BA BARBAROGALTIERI, A BARNES, VE BAUMANN, T BEDESCHI, F BEHRENDS, S BELFORTE, S BELLETTINI, G BELLINGER, J BENJAMIN, D BENSINGER, J BERETVAS, A BERGE, JP BERTOLUCCI, S BHADRA, S BINKLEY, M BLAIR, R BLOCKER, C BOLOGNESI, V BOOTH, AW BOSWELL, C BRANDENBURG, G BROWN, D BUCKLEYGEER, E BUDD, HS BUSETTO, G BYONWAGNER, A BYRUM, KL CAMPAGNARI, C CAMPBELL, M CANER, A CAREY, R CARITHERS, W CARLSMITH, D CARROLL, JT CASHMORE, R CASTRO, A CERVELLI, F CHADWICK, K CHIARELLI, G CHINOWSKY, W CIHANGIR, S CLARK, AG CONNOR, D CONTRERAS, M COOPER, J CORDELLI, M CRANE, D CURATOLO, M DAY, C DEJONGH, F DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DERWENT, PF DEVLIN, T DIBITONTO, D DICKSON, M DRUCKER, RB EINSWEILER, K ELIAS, JE ELY, R ENO, S ERREDE, S ESPOSITO, B FLAUGHER, B FOSTER, GW FRANKLIN, M FREEMAN, J FRISCH, H FUESS, T FUKUI, Y FUNAYAMA, Y GARFINKEL, AF GAUTHIER, A GEER, S GERDES, DW GIANNETTI, P GIOKARIS, N GIROMINI, P GLADNEY, L GOLD, M GOULIANOS, K GRASSMANN, H GROSSOPILCHER, C HABER, C HAHN, SR HANDLER, R HARA, K HARRIS, RM HAUSER, J HAWK, C HESSING, T HOLLEBEEK, R HOLLOWAY, L HU, P HUBBARD, B HUFFMAN, BT HUGHES, R HURST, P HUTH, J HYLEN, J INCAGLI, M INO, T ISO, H JENSEN, H JESSOP, CP JOHNSON, RP JOSHI, U KADEL, RW KAMON, T KANDA, S KARDELIS, DA KARLINER, I KEARNS, E KEEBLE, L KEPHART, R KESTEN, P KEUP, RM KEUTELIAN, H KIM, D KIM, S KIRSCH, L KONDO, K KONIGSBERG, J KOVACS, E KUHLMANN, SE KUNS, E LAASANEN, AT LAMOUREUX, JI LEONE, S LI, W LIMON, P LISS, TM LOCKYER, N LUCHINI, CB LUKENS, P MAAS, P MAESHIMA, K MANGANO, M MARRINER, JP MARIOTTI, M MARKELOFF, R MARKOSKY, LA MATTINGLY, R MCINTYRE, P MENZIONE, A MEYER, T MIKAMO, S MILLER, M MIMASHI, T MISCETTI, S MISHINA, M MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A NAKAE, LF NAKANO, I NELSON, C NEWMANHOLMES, C NG, JST NINOMIYA, M NODULMAN, L OGAWA, S PAOLETTI, R PARA, A PARE, E PARK, S PATRICK, J PHILLIPS, TJ PTOHOS, F PLUNKETT, R PONDROM, L PROUDFOOT, J PUNZI, G QUARRIE, D RAGAN, K REDLINGER, G RHOADES, J ROACH, M RIMONDI, F RISTORI, L ROHALY, T ROODMAN, A SAKUMOTO, WK SANSONI, A SARD, RD SAVOYNAVARRO, A SCARPINE, V SCHLABACH, P SCHMIDT, EE SCHNEIDER, O SCHUB, MH SCHWITTERS, R SCRIBANO, A SEGLER, S SEIYA, Y SEKIGUCHI, M SHAPIRO, M SHAW, NM SHEAFF, M SHOCHET, M SIEGRIST, J SINERVO, P SKARHA, J SLIWA, K SMITH, DA SNIDER, FD SONG, L SPAHN, M STDENIS, R STEFANINI, A SULLIVAN, G SWARTZ, RL TAKANO, M TARTARELLI, F TAKIKAWA, K TAREM, S THERIOT, D TIMKO, M TIPTON, P TKACZYK, S TOLLESTRUP, A TONNISON, J TRISCHUK, W TURINI, N TSAY, Y UKEGAWA, F UNDERWOOD, D VEJCIK, S VIDAL, R WAGNER, RG WAGNER, RL WAINER, N WALSH, J WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WHITE, SN WICKLUND, AB WILLIAMS, HH WINER, BL WYSS, J YAGIL, A YAMASHITA, A YASUOKA, K YEH, GP YOH, J YOKOYAMA, M YUN, JC ZANETTI, A ZETTI, F ZUCCHELLI, S TI PROPERTIES OF EVENTS WITH LARGE TOTAL TRANSVERSE ENERGY PRODUCED IN PROTON-ANTIPROTON COLLISIONS AT SQUARE-ROOT-S = 1.8 TEV SO PHYSICAL REVIEW D LA English DT Article ID PBARP COLLISIONS; DETECTOR AB The properties of proton-antiproton interactions in which the total transverse energy exceeds 400 GeV are described. These events have been recorded at the Fermilab Tevatron collider operating at a center-of-mass energy of 1.8 TeV. The differential cross section, jet rates, jet transverse-momentum and pseudorapidity distributions, single-jet shapes, and the multijet rates and kinematics are compared with QCD predictions. There is no evidence for a significant deviation from standard-model expectations that would be signaled by the presence of an excess of isolated high-transverse-momentum leptons or photons, or an excess of events with unusual jet rates or characteristics. C1 TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53706. IST NAZL FIS NUCL,LAB NAZL FRASCATI,FRASCATI,ITALY. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. UNIV PADUA,INST NAZL FIS NUCL,I-35131 PADUA,ITALY. UNIV PISA,IST NAZL FIS NUCL,I-56100 PISA,ITALY. PURDUE UNIV,W LAFAYETTE,IN 47907. ROCKEFELLER UNIV,NEW YORK,NY 10021. RUTGERS STATE UNIV,PISCATAWAY,NJ 08854. UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN. ARGONNE NATL LAB,ARGONNE,IL 60439. BRANDEIS UNIV,WALTHAM,MA 02254. FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV CHICAGO,CHICAGO,IL 60637. HARVARD UNIV,CAMBRIDGE,MA 02138. UNIV ILLINOIS,URBANA,IL 61801. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV PENN,PHILADELPHIA,PA 19104. SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY. UNIV ROCHESTER,ROCHESTER,NY 14627. TEXAS A&M UNIV SYST,COLLEGE STN,TX 77843. RP ABE, F (reprint author), NATL LAB HIGH ENERGY PHYS,OHO,IBARAKI 305,JAPAN. RI St.Denis, Richard/C-8997-2012; Chiarelli, Giorgio/E-8953-2012; Punzi, Giovanni/J-4947-2012 OI Chiarelli, Giorgio/0000-0001-9851-4816; Punzi, Giovanni/0000-0002-8346-9052 NR 13 TC 13 Z9 13 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 APR 1 PY 1992 VL 45 IS 7 BP 2249 EP 2263 DI 10.1103/PhysRevD.45.2249 PG 15 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HK953 UT WOS:A1992HK95300010 ER PT J AU EICHTEN, EJ HINCHLIFFE, I QUIGG, C AF EICHTEN, EJ HINCHLIFFE, I QUIGG, C TI FLAVOR ASYMMETRY IN THE LIGHT-QUARK SEA OF THE NUCLEON SO PHYSICAL REVIEW D LA English DT Article ID INELASTIC MUON SCATTERING; HIGH Q2; DISTRIBUTIONS; PROTON; MODEL AB Parton distributions with an excess of down quarks over up quarks in the sea can reproduce data on the structure functions F2(mu-p), F2(mu-n), and xF3(v N). A model calculation in chiral field theory shows how an up-down asymmetry can arise from the dissociation of a quark into a quark plus a pion within the nucleon. This effect is large enough to account for the Gottfried-sum-rule defect reported by the New Muon Collaboration. Similar calculations may advance the understanding of other quasistatic properties of hadrons. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP EICHTEN, EJ (reprint author), FERMI NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. NR 40 TC 191 Z9 192 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 APR 1 PY 1992 VL 45 IS 7 BP 2269 EP 2275 DI 10.1103/PhysRevD.45.2269 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HK953 UT WOS:A1992HK95300012 ER PT J AU ATWOOD, D SONI, A AF ATWOOD, D SONI, A TI ANALYSIS FOR MAGNETIC-MOMENT AND ELECTRIC-DIPOLE MOMENT FORM-FACTORS OF THE TOP QUARK VIA E+E-]TTBAR SO PHYSICAL REVIEW D LA English DT Article AB Phenomenological analysis for determining the magnetic moment and electic dipole moment form factors of the top quark via the reaction e+ e- --> ttBAR, followed by the decays t --> bW+ and tBAR --> bW-BAR, is presented, with analytic expressions for the differential cross section and decay given. Various experimental observables are studied and their efficacy for the determination of form factors is considered and compared with the optimal resolution of form factors in the tt-gammaBAR and tt-ZBAR vertices. We find that with a sample of 10 000 events it is possible to put limits of 10(-18) -10(-19) e cm for the form factors considered, evaluated at q2 = s when unroofed radical s almost-equal-to 500 GeV. RP ATWOOD, D (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 17 TC 171 Z9 171 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 APR 1 PY 1992 VL 45 IS 7 BP 2405 EP 2413 DI 10.1103/PhysRevD.45.2405 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HK953 UT WOS:A1992HK95300024 ER PT J AU NEUBERT, M AF NEUBERT, M TI HEAVY-MESON FORM-FACTORS FROM QCD SUM-RULES SO PHYSICAL REVIEW D LA English DT Article ID LEPTONIC DECAY CONSTANTS; EFFECTIVE FIELD-THEORY; INTERMEDIATE MOMENTUM-TRANSFER; B-MESON; QUARK MASSES; QUANTUM CHROMODYNAMICS; RESONANCE PHYSICS; PERTURBATIVE QCD; MATRIX-ELEMENTS; LIGHT AB A consistent framework is developed for studying hadronic form factors of heavy mesons using QCD sum rules in the heavy-quark effective theory, including the next-to-leading-order renormalization-group improvement. Sum rules are derived for the asymptotic value of the meson decay constant f(P) and for the universal Isgur-Wise form factor. It is shown that renormalization-group effects considerably enhance the prediction for f(P) and bring its asymptotic value in accordance with recent lattice results. Including finite-mass corrections, the dependence of the physical decay constant on the meson mass is investigated. We obtain f(D) congruent-to 170 +/- 30 MeV and f(B) congruent-to 190 +/- 50 MeV. The origin of the breakdown of the heavy-quark expansion for f(D) is analyzed. In the case of heavy-meson transition form factors, both the QCD and 1/m(Q) corrections are moderate and under control. A sum rule for the renormalized Isgur-Wise function is derived and evaluated. The theoretical result is compared to experimental data. RP NEUBERT, M (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305, USA. NR 79 TC 220 Z9 220 U1 1 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 APR 1 PY 1992 VL 45 IS 7 BP 2451 EP 2466 DI 10.1103/PhysRevD.45.2451 PG 16 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HK953 UT WOS:A1992HK95300030 ER PT J AU FROGGATT, CD MOORHOUSE, RG KNOWLES, IG AF FROGGATT, CD MOORHOUSE, RG KNOWLES, IG TI LEADING RADIATIVE-CORRECTIONS IN 2-SCALAR-DOUBLET MODELS SO PHYSICAL REVIEW D LA English DT Article ID VECTOR BOSON MASSES; LARGE HIGGS MASS; ELECTRIC-DIPOLE MOMENT; WEAK-INTERACTIONS; 2-HIGGS-DOUBLET MODEL; SYMMETRY-BREAKING; ISOSPIN BREAKING; NEUTRAL CURRENTS; STANDARD MODEL; CP VIOLATION AB The leading radiative corrections arising from scalar contributions to the vector-boson self-energies, oblique corrections, are analyzed for extensions of the standard model involving two scalar doublets. We employ the most general such model which is compatible with natural flavor conservation, but allowing the possibility of soft discrete-symmetry-breaking terms. Several interesting, special cases are discussed. C1 ARGONNE NATL LAB,DIV HIGH ENERGY PHYS,ARGONNE,IL 60439. RP FROGGATT, CD (reprint author), UNIV GLASGOW,DEPT PHYS & ASTRON,GLASGOW G12 8QQ,SCOTLAND. NR 67 TC 50 Z9 50 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 APR 1 PY 1992 VL 45 IS 7 BP 2471 EP 2481 DI 10.1103/PhysRevD.45.2471 PG 11 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HK953 UT WOS:A1992HK95300032 ER PT J AU ANJOS, JC APPEL, JA BEAN, A BRACKER, SB BROWDER, TE CREMALDI, LM DUBOSCQ, JE ELLIOTT, JR ESCOBAR, CO GIBNEY, MC HARTNER, GF HUBER, J KARCHIN, PE KUMAR, BR LOSTY, MJ LUSTE, GJ MANTSCH, PM MARTIN, JF MCHUGH, S MENARY, SR MORRISON, RJ NASH, T PINFOLD, J PUNKAR, G PUROHIT, MV ROSS, WR SANTORO, AFS SCHMIDT, DM SHOUP, AL SLIWA, K SOKOLOFF, MD SOUZA, MHG SPERKA, DJ STREETMAN, ME STUNDZIA, AB WITHERELL, MS AF ANJOS, JC APPEL, JA BEAN, A BRACKER, SB BROWDER, TE CREMALDI, LM DUBOSCQ, JE ELLIOTT, JR ESCOBAR, CO GIBNEY, MC HARTNER, GF HUBER, J KARCHIN, PE KUMAR, BR LOSTY, MJ LUSTE, GJ MANTSCH, PM MARTIN, JF MCHUGH, S MENARY, SR MORRISON, RJ NASH, T PINFOLD, J PUNKAR, G PUROHIT, MV ROSS, WR SANTORO, AFS SCHMIDT, DM SHOUP, AL SLIWA, K SOKOLOFF, MD SOUZA, MHG SPERKA, DJ STREETMAN, ME STUNDZIA, AB WITHERELL, MS TI STUDY OF THE DECAYS D-]K-PI-PI-EV AND D-]K-STAR-PI-EV SO PHYSICAL REVIEW D LA English DT Note ID D-MESON AB We have searched for the exclusive semileptonic decay modes D+ --> K-pi-pi-eBAR+ nu(e) and D+ --> KBAR* pi-e+ nu(e) in the data from the Fermilab photoproduction experiment E691. With good sensitivity, we observe no signals in the channels D+ --> K- pi+pi(0)e+ nu(e) and D+ --> K0BAR pi+pi-e+ nu(e), and set upper limits of B(D+ --> all K*BAR pi-e+ nu(e)) < 1.2% and B(D+ --> all K-pi-pi-eBAR+ nu(e)) < 0.9%, at the 90% confidence level. (For these limits we use isospin invariance to extract limits which include all charge states.) These modes are expected to be the most common semileptonic decays next to the dominant Ke+BAR v(e) and K*E+BAR v(e), but the observed limits represent a small fraction of the inclusive semileptonic branching ratio of (17.0 +/- 1.9 +/- 1.7)%. C1 UNIV CALIF SANTA BARBARA, SANTA BARBARA, CA 93106 USA. CARLETON UNIV, OTTAWA K1S 5B6, ONTARIO, CANADA. UNIV CINCINNATI, CINCINNATI, OH 45221 USA. UNIV COLORADO, BOULDER, CO 80309 USA. FERMI NATL ACCELERATOR LAB, BATAVIA, IL 60510 USA. NATL RES COUNCIL CANADA, OTTAWA K1A 0R6, ONTARIO, CANADA. PRINCETON UNIV, PRINCETON, NJ 08544 USA. UNIV SAO PAULO, SAO PAULO, BRAZIL. UNIV TORONTO, TORONTO M5S 1A7, ONTARIO, CANADA. UNIV MISSISSIPPI, OXFORD, MS 38677 USA. YALE UNIV, NEW HAVEN, CT 06511 USA. RP CTR BRASILEIRO PESQUISAS FIS, BR-20000 RIO DE JANEIRO, BRAZIL. RI Anjos, Joao/C-8335-2013 NR 8 TC 7 Z9 7 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD APR 1 PY 1992 VL 45 IS 7 BP R2177 EP R2180 DI 10.1103/PhysRevD.45.R2177 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HK953 UT WOS:A1992HK95300001 ER PT J AU HSUEH, SY PALESTINI, S AF HSUEH, SY PALESTINI, S TI WIDTH OF THE J/PSI RESONANCE SO PHYSICAL REVIEW D LA English DT Note ID E+E ANNIHILATION AB Measurements of the J/psi total width and branching ratios for decays to lepton pairs and hadronic final states are reviewed. New values for the overall best fits are provided. C1 IST NAZL FIS NUCL,I-10125 TURIN,ITALY. RP HSUEH, SY (reprint author), FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510, USA. NR 7 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 APR 1 PY 1992 VL 45 IS 7 BP R2181 EP R2182 PG 2 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HK953 UT WOS:A1992HK95300002 ER PT J AU MANDULA, JE OGILVIE, MC AF MANDULA, JE OGILVIE, MC TI LATTICE IMPLEMENTATION OF THE ISGUR-WISE LIMIT SO PHYSICAL REVIEW D LA English DT Note ID EFFECTIVE FIELD-THEORY; SPIN-DEPENDENT FORCES; HEAVY MESONS; FORM-FACTORS; QUARK; APPROXIMATION AB We construct the Isgur-Wise limit of QCD in a form appropriate for measurement by lattice-gauge-theory techniques. The coordinate-space fermion propagator in the presence of a background gauge field has a systematic expansion in powers of the inverse quark mass about the Isgur-Wise limit. The formulation permits a calculation of heavy-quark processes even when the momentum transfers are much larger than the inverse lattice spacing. Applications include semileptonic heavy-quark decay and scattering processes, including the computation of the nonperturbative part of the Isgur-Wise universal function. C1 WASHINGTON UNIV,DEPT PHYS,ST LOUIS,MO 63130. RP MANDULA, JE (reprint author), US DOE,DIV HIGH ENERGY PHYS,WASHINGTON,DC 20585, USA. NR 17 TC 28 Z9 28 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 APR 1 PY 1992 VL 45 IS 7 BP R2183 EP R2187 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HK953 UT WOS:A1992HK95300003 ER PT J AU BROW, RK PHIFER, CC XU, XJ DAY, DE AF BROW, RK PHIFER, CC XU, XJ DAY, DE TI AN X-RAY PHOTOELECTRON-SPECTROSCOPY STUDY OF ANION BONDING IN TIN(II) FLUOROPHOSPHATE GLASS SO PHYSICS AND CHEMISTRY OF GLASSES LA English DT Article ID CRYSTAL-STRUCTURE; PHOSPHATE; OXIDE AB We have used x-ray photoelectron spectroscopy to examine the structural environments of F and O in several series of SnF2-SnO-P2O5 glasses. The F 1s spectra indicate that F is incorporated primarily in F-P bonds in glasses containing 40 and 50 mol% P2O5, whereas F-Sn bonds coexist with F-P species in glasses with 30 mol% P2O5. The O 1s spectra reveal that bridging oxygens (P-O-P) are consumed as SnF2 replaces SnO. Using these results, along with reported Sn(II) crystal structures, we have developed a qualitative structural model that helps explain the composition/property relationships of these interesting glasses. In particular, the lone electron pair typically associated with Sn(II) oxides and fluorides produces highly asymmetric Sn polyhedra which lead to high thermal expansions and low glass transition temperatures. C1 UNIV MISSOURI,DEPT CERAM ENGN,ROLLA,MO 65401. RP BROW, RK (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 24 TC 38 Z9 38 U1 0 U2 4 PU SOC GLASS TECHNOLOGY PI SHEFFIELD PA THORNTON 20 HALLAM GATE ROAD, SHEFFIELD, S YORKSHIRE, ENGLAND S10 5BT SN 0031-9090 J9 PHYS CHEM GLASSES JI Phys. Chem. Glasses PD APR PY 1992 VL 33 IS 2 BP 33 EP 39 PG 7 WC Chemistry, Physical; Materials Science, Ceramics SC Chemistry; Materials Science GA HN440 UT WOS:A1992HN44000001 ER PT J AU MONTIERTH, LM NEUMAN, WA MORSE, RL AF MONTIERTH, LM NEUMAN, WA MORSE, RL TI FLUID MODEL TREATMENT OF SURFACE PLASMA STRUCTURES SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID THERMAL CONDUCTION; REGIME AB A fluid model is presented for the purpose of calculating numerically the structures of surface plasmas with neutrals returning from the surface, in collision-dominated parameter regimes. Limiting corrections to thermal conduction and viscous pressure are obtained through comparisons with previous Fokker-Planck transport calculations. The model includes removal by pumping, as well as by ionization, of some of the returning neutrals, and solutions are obtained for different relative strengths of pumping. Increasing velocities of plasma flow toward the surface and increasing plasma temperatures near the surface are seen with increased pumping. In the asymptotic region, far from the surface, agreement is found between these families of numerical model solutions and two classes of analytic solutions. Applications to other fundamental and applied problems are discussed. C1 UNIV ARIZONA,TUCSON,AZ 85721. RP MONTIERTH, LM (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. NR 19 TC 6 Z9 6 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD APR PY 1992 VL 4 IS 4 BP 784 EP 795 DI 10.1063/1.860233 PG 12 WC Physics, Fluids & Plasmas SC Physics GA HM774 UT WOS:A1992HM77400004 ER PT J AU TESSAROTTO, M WHITE, RB AF TESSAROTTO, M WHITE, RB TI MULTISPECIES TRANSPORT-THEORY FOR AXISYMMETRICAL ROTATING PLASMAS SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID ION-TRANSPORT; REGIME AB A reduced gyrokinetic equation is derived for a multispecies toroidal axisymmetric plasma with arbitrary toroidal differential rotation speeds and in the presence of a finite induced electric field. The kinetic equation obtained, extending previous results obtained by Hinton and Wong [Phys. Fluids 28, 3082 (1985)] and by Catto et al. [Phys. Fluids 30, 2784 (1987)], has a form suited for transport applications, via variational techniques; in particular it exhibits the feature that all source terms, including the Spitzer source term, carrying the contribution due to the inductive electric field, appear to be acted upon by the collision operator. Moreover, the equation displays a new contribution due to "explicit" velocity perturbations, here proven to be consistent with transport ordering, whose evaluation appears relevant for transport calculations. In addition, general expressions are obtained for the neoclassical fluxes in terms of a variational principle, as well as for the classical ones, retaining, in both cases, the contributions due to Spitzer's inductive terms. C1 PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. RP TESSAROTTO, M (reprint author), UNIV TRIESTE,DIPARTIMENTO SCI MATEMAT,TRIESTE,ITALY. RI White, Roscoe/D-1773-2013 OI White, Roscoe/0000-0002-4239-2685 NR 13 TC 17 Z9 17 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD APR PY 1992 VL 4 IS 4 BP 859 EP 871 DI 10.1063/1.860240 PG 13 WC Physics, Fluids & Plasmas SC Physics GA HM774 UT WOS:A1992HM77400011 ER PT J AU WARE, AS DIAMOND, PH BIGLARI, H CARRERAS, BA CHARLTON, LA LEBOEUF, JN WOOTTON, AJ AF WARE, AS DIAMOND, PH BIGLARI, H CARRERAS, BA CHARLTON, LA LEBOEUF, JN WOOTTON, AJ TI THEORY OF IONIZATION-DRIVEN DRIFT WAVE TURBULENCE SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID TOKAMAK EDGE TURBULENCE; TRANSPORT; PLASMA; INSTABILITIES; MODE AB The theory of ionization-driven drift wave turbulence is presented in the context of a quasilocal model. Linear analysis reveals that ionization effects can destabilize collisional drift waves and can possibly induce parallel shear flow instabilities, as well. Nonlinear analysis indicates that energy is transferred from large to small stable scales and converted to ion kinetic energy. Results indicate mode coupling effects are dominant. Large fluctuation levels, in excess of mixing length expectations, are predicted. The ionization source drives a purely inward particle flux, which can explain the anomalously rapid uptake of particles that occurs in response to gas puffing. C1 PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08544. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV TEXAS,FUS RES CTR,AUSTIN,TX 78712. GEN ATOM CO,SAN DIEGO,CA 92138. RP WARE, AS (reprint author), UNIV CALIF SAN DIEGO,DEPT PHYS,LA JOLLA,CA 92093, USA. NR 26 TC 54 Z9 54 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD APR PY 1992 VL 4 IS 4 BP 877 EP 887 DI 10.1063/1.860242 PG 11 WC Physics, Fluids & Plasmas SC Physics GA HM774 UT WOS:A1992HM77400013 ER PT J AU POMPHREY, N REIMAN, A AF POMPHREY, N REIMAN, A TI EFFECT OF NONAXISYMMETRIC PERTURBATIONS ON THE STRUCTURE OF A TOKAMAK POLOIDAL DIVERTOR SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID PLASMA AB The effects of n = 1 nonaxisymmetric perturbations on a tokamak poloidal divertor are described. Despite the existence of a region of chaotic field line trajectories outside the last closed flux surface, the footprint of the trajectories on the divertor plates is found to be largely coherent, forming a spiral structure. At a fixed toroidal angle, the footprint exhibits a bifurcation similar to that seen experimentally on DIII-D [Nucl. Fusion 28, 902 (1988)]. For field errors of the magnitude that exist in present-day tokamaks, the width of the nonaxisymmetric structure in the divertor footprint is comparable to the width of the scrape-off layer. RP POMPHREY, N (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543, USA. RI pomphrey, neil/G-4405-2010 NR 16 TC 34 Z9 34 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD APR PY 1992 VL 4 IS 4 BP 938 EP 948 DI 10.1063/1.860110 PG 11 WC Physics, Fluids & Plasmas SC Physics GA HM774 UT WOS:A1992HM77400020 ER PT J AU HORTON, W LINDBERG, D KIM, JY DONG, JQ HAMMETT, GW SCOTT, SD ZARNSTORFF, MC HAMAGUCHI, S AF HORTON, W LINDBERG, D KIM, JY DONG, JQ HAMMETT, GW SCOTT, SD ZARNSTORFF, MC HAMAGUCHI, S TI ION-TEMPERATURE-GRADIENT-DRIVEN TRANSPORT IN A DENSITY MODIFICATION EXPERIMENT ON THE TOKAMAK FUSION TEST REACTOR SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID DRIFT MODES DRIVEN; BALLOONING MODES; PRESSURE-GRADIENTS; TOROIDAL PLASMAS; TFTR TOKAMAK; TURBULENCE; INSTABILITIES; DISCHARGES; MOMENTUM; LIMIT AB Tokamak Fusion Test Reactor (TFTR) profiles from a supershot density-modification experiment [Zarnstorff et al., Plasma Physics and Controlled Nuclear Fusion Research, 1990, Proceedings of the 12th International Conference, Washington (IAEA, Vienna, 1991), Vol. I, p. 109] are analyzed for their local and ballooning stability to toroidal eta(i) modes in order to understand the initially puzzling results showing no increase in chi(i) when a pellet is used to produce an abrupt and large increase in the eta(i) parameter. The local stability analysis assumes that k parallel-to = 1/qR and ignores the effects of shear, but makes no assumption on the magnitude of k parallel-to upsilon(ti)/omega. The ballooning stability analysis determines a self-consistent linear spectrum of k parallel-to 's including the effect of shear and toroidicity, but it expands in k parallel-to upsilon(ti)/omega less-than-or-equal-to 1, which is a marginal assumption for this experiment. Nevertheless, the two approaches agree well and show that the mixing length estimate of the transport rate does not change appreciably during the density modification and has a value close to or less than the observed chi(i), in contrast to most previous theories, which predicted chi(i)'s that were over an order-of-magnitude too large. However, still to be explained is the observed increase of chi(i) (r) with minor radius by adding the effects of (i) the finite-beta drift wave-magnetohydrodynamic (MHD) mode coupling, (ii) the slablike mode, or (iii) the trapped-electron response. The experimental tracking 0.2 < chi(e)/chi(i) < 0.7 suggests that both grad T(i) and trapped-electron driving mechanisms are operating. C1 PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08544. IBM CORP,THOMAS J WATSON RES CTR,DIV RES,YORKTOWN HTS,NY 10598. RP HORTON, W (reprint author), UNIV TEXAS,INST FUS STUDIES,AUSTIN,TX 78712, USA. RI Hammett, Gregory/D-1365-2011 OI Hammett, Gregory/0000-0003-1495-6647 NR 43 TC 40 Z9 40 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD APR PY 1992 VL 4 IS 4 BP 953 EP 966 DI 10.1063/1.860112 PG 14 WC Physics, Fluids & Plasmas SC Physics GA HM774 UT WOS:A1992HM77400022 ER PT J AU REMINGTON, BA HAAN, SW GLENDINNING, SG KILKENNY, JD MUNRO, DH WALLACE, RJ AF REMINGTON, BA HAAN, SW GLENDINNING, SG KILKENNY, JD MUNRO, DH WALLACE, RJ TI LARGE GROWTH, PLANAR RAYLEIGH-TAYLOR EXPERIMENTS ON NOVA SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID HYDRODYNAMIC STABILITY; LASER-FUSION; INSTABILITY; DRIVEN; TARGETS; PLASMA; SIMULATIONS; IMPLOSIONS; ABLATION; MODEL AB A set of indirect-drive experiments to study large growth Rayleigh-Taylor instability using shaped laser pulses at the Nova laser facility has been conducted. Planar foils of fluorosilicone were accelerated by x-ray ablation. The foil trajectory was measured using edge-on radiography. In separate experiments using face-on radiography, contrast in optical depth was measured as a function of time, from which the evolution of 50-mu-m wavelength initially sinusoidal surface perturbations was deduced. Holding other parameters fixed, the amplitude of the initial perturbation was varied by up to a factor of 30 in separate shots. The foils with the smallest initial perturbation exhibited growth factors of 75 in contrast. Foils with large initial amplitude perturbation gave growth factors of 6 or less, and displayed the "bubble-and-spike" shape characteristic of the nonlinear Rayleigh-Taylor instability. Comparisons of two-dimensional computer simulations with both the measured foil trajectory and the perturbation growth show good agreement, provided that a suitable opacity model is chosen. In the linear regime the observed growth rates are 60%-75% of classical, the reduction attributed primarily to ablative stabilization. The observed onset of harmonic generation, signaling the transition into the nonlinear regime, is well predicted by third-order theory. RP REMINGTON, BA (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 72 TC 76 Z9 80 U1 0 U2 9 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD APR PY 1992 VL 4 IS 4 BP 967 EP 978 DI 10.1063/1.860113 PG 12 WC Physics, Fluids & Plasmas SC Physics GA HM774 UT WOS:A1992HM77400023 ER PT J AU BOSCH, RA BERGER, RL FAILOR, BH DELAMATER, ND CHARATIS, G KAUFFMAN, RL AF BOSCH, RA BERGER, RL FAILOR, BH DELAMATER, ND CHARATIS, G KAUFFMAN, RL TI COLLISION AND INTERPENETRATION OF PLASMAS CREATED BY LASER-ILLUMINATED DISKS SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID DRIVEN GOLD DISKS; SPECTROSCOPY; EVOLUTION AB Supersonic, counterstreaming plasmas were produced by ablating plasma from the inside surfaces of two parallel disks made of aluminum and magnesium, respectively, with a 0.53-mu-m laser at an intensity of 10(14) W/cm2 for 1.3 nsec. Diagnostics included holographic interferometry, a time-integrated x-ray pinhole camera and a gated x-ray crystal spectrograph with imaging slits. The plasmas interpenetrate for the first half of the laser pulse but stagnate once the electron density exceeds 5 x 10(20) cm-3. Spectroscopic measurements suggest a coronal electron temperature of approximately 800 eV and an ion temperature of approximately 15 keV in the stagnated plasma. The observations are in good agreement with a two ion fluid model of interpenetrating plasmas in which the dominant slowing down process is ion-ion collisions. C1 KMS FUSION INC,ANN ARBOR,MI 48106. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 15 TC 49 Z9 49 U1 0 U2 7 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD APR PY 1992 VL 4 IS 4 BP 979 EP 988 DI 10.1063/1.860114 PG 10 WC Physics, Fluids & Plasmas SC Physics GA HM774 UT WOS:A1992HM77400024 ER PT J AU POLLAINE, SM BERGER, RL KEANE, CJ AF POLLAINE, SM BERGER, RL KEANE, CJ TI STAGNATION AND INTERPENETRATION OF LASER-CREATED COLLIDING PLASMAS SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article AB An experiment that observed the collision of aluminum laser produced (Al) and magnesium (Mg) plasmas is described in an accompanying paper [Phys. Fluids B 4, 979 (1992)]. Time-and space-resolved measurements were made of the electron density, Ly(alpha) and He(alpha) lines of Al and Mg, and x-ray pinhole images. These measurements are interpreted with the use of a two ion fluid hydrodynamic model and a time-dependent atomic physics model. The qualitatively successful modeling of the line emission confirms that at early times, the Al interpenetrates the counterstreaming Mg plasma and deposits in the dense Mg region. At late times, the Al plasma stagnates against the Mg plasma, approximately halfway between the initial disk surfaces. RP POLLAINE, SM (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT PHYS,LIVERMORE,CA 94550, USA. NR 5 TC 18 Z9 18 U1 0 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD APR PY 1992 VL 4 IS 4 BP 989 EP 991 DI 10.1063/1.860457 PG 3 WC Physics, Fluids & Plasmas SC Physics GA HM774 UT WOS:A1992HM77400025 ER PT J AU CESAREO, R HANSON, AL GIGANTE, GE PEDRAZA, LJ MAHTABOALLY, SQG AF CESAREO, R HANSON, AL GIGANTE, GE PEDRAZA, LJ MAHTABOALLY, SQG TI INTERACTION OF KEV PHOTONS WITH MATTER AND NEW APPLICATIONS SO PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS LA English DT Review ID X-RAY-FLUORESCENCE; COHERENT-COMPTON-SCATTERING; POLARIZED SYNCHROTRON RADIATION; BOUND ELECTRON STATES; BONE-MINERAL CONTENT; RAYLEIGH-SCATTERING; TRABECULAR BONE; CROSS-SECTION; MOMENTUM DISTRIBUTION; MULTIPLE-SCATTERING AB The fundamental interactions of keV photons with matter, i.e. photoelectric effect and coherent and incoherent scattering are treated from a non-traditional point of view. Section 1 is designed to lay a foundation of the basic science. Section 2 deals with non-imaging analytical techniques that have been developed over the past 20 or so years. These techniques include energy-dispersive X-ray fluorescence, Compton profile measurements, and general scattering techniques. In section 3, imaging techniques are described. These imaging techniques utilize the details of section 1, and some expand on techniques described in section 2. This section finishes with discussions of "traditional" computerized tomography (CT) techniques followed by newer developments such as differential tomography, Compton tomography, coherent scatter tomography, and fluorescent X-ray tomography. C1 UNIV ROME LA SAPIENZA,DIPARTIMENTO ENERGET,I-00185 ROME,ITALY. BROOKHAVEN NATL LAB,UPTON,NY 11973. INT ATOM ENERGY AGCY,A-1011 VIENNA,AUSTRIA. UNIV RAJASTHAN,DEPT PHYS,JAIPUR 302004,RAJASTHAN,INDIA. RP CESAREO, R (reprint author), UNIV ROME LA SAPIENZA,CTR INGN BIOMED,I-00185 ROME,ITALY. OI Gigante, Giovanni Ettore/0000-0001-5943-9366 NR 125 TC 80 Z9 80 U1 0 U2 12 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-1573 J9 PHYS REP JI Phys. Rep.-Rev. Sec. Phys. Lett. PD APR PY 1992 VL 213 IS 3 BP 117 EP 178 DI 10.1016/0370-1573(92)90086-F PG 62 WC Physics, Multidisciplinary SC Physics GA HV470 UT WOS:A1992HV47000001 ER PT J AU BERRY, G GREENE, J BOWEN, S AF BERRY, G GREENE, J BOWEN, S TI MORE EDUCATIONAL OUTREACH PROGRAMS SO PHYSICS TODAY LA English DT Letter RP BERRY, G (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD APR PY 1992 VL 45 IS 4 BP 114 EP 114 PG 1 WC Physics, Multidisciplinary SC Physics GA HN496 UT WOS:A1992HN49600024 ER PT J AU MORE, R AF MORE, R TI ATOMS IN PLASMAS SO PHYSICS WORLD LA English DT Article RP MORE, R (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT PHYS,POB 808,LIVERMORE,CA 94550, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-8585 J9 PHYS WORLD JI Phys. World PD APR PY 1992 VL 5 IS 4 BP 38 EP 42 PG 5 WC Physics, Multidisciplinary SC Physics GA HM242 UT WOS:A1992HM24200032 ER PT J AU JACOBSON, AR ERICKSON, WC AF JACOBSON, AR ERICKSON, WC TI WAVE-NUMBER-RESOLVED OBSERVATIONS OF IONOSPHERIC WAVES USING THE VERY LARGE ARRAY RADIOTELESCOPE SO PLANETARY AND SPACE SCIENCE LA English DT Article ID ATMOSPHERIC GRAVITY-WAVES; RADIO AB During a campaign of observations in 1990, we used the Very Large Array (VLA) radiotelescope to study ionospheric waves via their transient signatures in the line of sight total electron content (TEC). The data analysis exploited the fact that VLA baselines (less-than-or-equal-to 35 km) are comparable with the waves' horizontal scale-lengths lambda/(2-pi), thus enabling us to measure the waves' horizontal phase velocity V. The observed waves consist of two main groups: as seen by numerous earlier studies, traveling ionospheric disturbances (TIDs) dominate at long periods (> 10(3) s); their horizontal phase speeds are typically V < 0.2 km s-1, and their azimuth distributions are quasi-isotropic. However, at short periods (< 3 x 10(2) s) the dominant waves are magnetic-eastward directed (MED), and these have phase speeds in the range 0.1 less-than-or-equal-to V < km s-1. The MED disturbances are too fast to be F-region drifting irregularities but are usually too slow to be acoustic waves. The MED waves observed to date cause very small r.m.s. TEC perturbations (less-than-or-equal-to 2 x 10(13) m-2). They are more active at night and are much more visible along South- rather than North-directed lines of sight. We are not aware of any prior reports of such waves. C1 UNIV MARYLAND,ASTRON PROGRAM,COLLEGE PK,MD 20742. RP JACOBSON, AR (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV SPACE SCI & TECHNOL,ATMOSPHER SCI GRP,MAIL STOP D466,LOS ALAMOS,NM 87545, USA. NR 11 TC 20 Z9 20 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0032-0633 J9 PLANET SPACE SCI JI Planet Space Sci. PD APR PY 1992 VL 40 IS 4 BP 447 EP 455 DI 10.1016/0032-0633(92)90163-I PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HR354 UT WOS:A1992HR35400003 ER PT J AU BAKER, DN FAIRFIELD, DH SLAVIN, JA RICHARDSON, IG OWEN, CJ CRAVEN, JD FRANK, LA ELPHIC, RC SINGER, HJ ZWICKL, RD AF BAKER, DN FAIRFIELD, DH SLAVIN, JA RICHARDSON, IG OWEN, CJ CRAVEN, JD FRANK, LA ELPHIC, RC SINGER, HJ ZWICKL, RD TI THE SUBSTORM EVENT OF 28 JANUARY 1983 - A DETAILED GLOBAL STUDY SO PLANETARY AND SPACE SCIENCE LA English DT Article C1 UNIV ALASKA,INST GEOPHYS,FAIRBANKS,AK 99701. UNIV IOWA,DEPT PHYS & ASTRON,IOWA CITY,IA 52242. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87549. PHG,GEOPHYS LAB,BEDFORD,MA 01731. SPACE ENVIRONM LAB,BOULDER,CO 80302. RP BAKER, DN (reprint author), NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771, USA. RI Owen, Christopher/C-2999-2008; Slavin, James/H-3170-2012 OI Owen, Christopher/0000-0002-5982-4667; Slavin, James/0000-0002-9206-724X NR 2 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0032-0633 J9 PLANET SPACE SCI JI Planet Space Sci. PD APR PY 1992 VL 40 IS 4 BP 589 EP 590 DI 10.1016/0032-0633(92)90273-Q PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HR354 UT WOS:A1992HR35400015 ER PT J AU FLAHERTY, L MESSER, A RUSSELL, LB RINCHIK, EM AF FLAHERTY, L MESSER, A RUSSELL, LB RINCHIK, EM TI CHLORAMBUCIL-INDUCED MUTATIONS IN MICE RECOVERED IN HOMOZYGOTES SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE CHEMICAL MUTAGENESIS; INBREEDING SCHEMES; REELER; POLYCYSTIC KIDNEYS; NEUROLOGICAL DEFECTS ID ALBINO-DELETION COMPLEX; GENE; MOUSE; ORGANIZATION; CDNA AB Chlorambucil induced a number of recessive visible mutations in the mouse. Induction of these mutations was studied in two mating schemes, each designed to recover mutations after two intercrosses. In scheme 1, 10 mutations were detected in 82 mice; in scheme 2, 1 mutation was detected in 19 mice. We have estimated that the proportion of gametes carrying a recessive visible mutation may be as high as 25% after a dose of 10 mg of chlorambucil per kg to early spermatids. Seven of these mutations caused morphologically distinct abnormalities, including (i) a cerebellar abnormality similar to that expressed in homozygotes for the reeler (rl) mutation; (ii) open eyelids at birth; (iii) a rostral head hemangioma; (iv) abnormally small spleens, anemia, and umbilical hemorrhages; (v) immobility at birth; (vi) polycystic kidneys; and (vii) a circling behavior. Four additional mutations resulted in growth retardation and a runting syndrome. Because, in earlier studies, all molecularly characterized mutations induced by chlorambucil in poststem cells have proved to be deletions, these recessive visible mutations are probably deletions as well. These mutations may be useful in isolating and characterizing the genes responsible for the observed phenotypes. C1 OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. SUNY ALBANY,DEPT BIOMED SCI,ALBANY,NY 12201. RP FLAHERTY, L (reprint author), WADSWORTH CTR LABS & RES,MOLEC GENET PROGRAM,EMPIRE STATE PLAZA,POB 509,ALBANY,NY 12201, USA. FU NIEHS NIH HHS [Y01-ES-10067]; NIGMS NIH HHS [GM37947] NR 24 TC 39 Z9 39 U1 0 U2 2 PU NATL ACAD PRESS PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD APR 1 PY 1992 VL 89 IS 7 BP 2859 EP 2863 DI 10.1073/pnas.89.7.2859 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HL816 UT WOS:A1992HL81600072 PM 1557392 ER PT J AU PRATT, LR POHORILLE, A AF PRATT, LR POHORILLE, A TI THEORY OF HYDROPHOBICITY - TRANSIENT CAVITIES IN MOLECULAR LIQUIDS SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE SOLUBILITIES; SCALED PARTICLE MODEL; CAVITY SIZE DISTRIBUTIONS; CAVITY FORMATION WORK; SURFACE TENSION ID NONPOLAR SOLUTES; VAPOR INTERFACE; MONTE-CARLO; WATER; DYNAMICS; EQUATION AB Observation of the size distribution of transient cavities in computer simulations of water, n-hexane, and n-dodecane under benchtop conditions shows that the sizes of cavities are more sharply defined in liquid water but the most-probable-size cavities are about the same size in each of these liquids. The calculated solvent atomic density in contract with these cavities shows that water applies more force per unit area of cavity surface than do the hydrocarbon liquids. This contact density, or "squeezing" force, reaches a maximum near cavity diameters of 2.4 angstrom. The results for liquid water are compared to the predictions of simple theories and, in addition, to results for a reference simple liquid. The numerical data for water at a range of temperatures are analyzed to extract a surface free energy contribution to the work of formation of atomic-size cavities. Comparison with the liquid-vapor interfacial tensions of the model liquids studied here indicates that the surface free energies extracted for atomic-size cavities cannot be accurately identified with the macroscopic surface tensions of the systems. C1 UNIV CALIF BERKELEY, DEPT CHEM, BERKELEY, CA 94720 USA. NASA, AMES RES CTR, MOFFETT FIELD, CA 94035 USA. RP PRATT, LR (reprint author), UNIV CALIF LOS ALAMOS SCI LAB, LOS ALAMOS, NM 87545 USA. RI Pratt, Lawrence/H-7955-2012 OI Pratt, Lawrence/0000-0003-2351-7451 FU NCI NIH HHS [NCA-2 315] NR 36 TC 176 Z9 176 U1 1 U2 24 PU NATL ACAD PRESS PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD APR 1 PY 1992 VL 89 IS 7 BP 2995 EP 2999 DI 10.1073/pnas.89.7.2995 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HL816 UT WOS:A1992HL81600100 PM 11537863 ER PT J AU SCHUMAN, J AF SCHUMAN, J TI COOL DAYLIGHT + NEW GLAZING PRODUCTS FOR WINDOW DESIGN SO PROGRESSIVE ARCHITECTURE LA English DT Article C1 CCAC,SAN FRANCISCO,CA. RP SCHUMAN, J (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 6 TC 3 Z9 3 U1 0 U2 0 PU PENTON PUBL INC PI CLEVELAND PA 1100 SUPERIOR AVE, CLEVELAND, OH 44114 SN 0033-0752 J9 PROG ARCHIT JI Progress. Archit. PD APR PY 1992 VL 73 IS 4 BP 136 EP 141 PG 6 WC Architecture SC Architecture GA HN502 UT WOS:A1992HN50200033 ER PT J AU SCHIFFER, M CHANG, CH STEVENS, FJ AF SCHIFFER, M CHANG, CH STEVENS, FJ TI THE FUNCTIONS OF TRYPTOPHAN RESIDUES IN MEMBRANE-PROTEINS SO PROTEIN ENGINEERING LA English DT Article ID PHOTOSYNTHETIC REACTION CENTER; RHODOPSEUDOMONAS-VIRIDIS; INSERTION; INTERFACE; PEPTIDES; TOPOLOGY; MODEL AB Membrane proteins have a significantly higher Trp content than do soluble proteins. This is especially true for the M and L subunits of the photosynthetic reaction center from purple bacteria. The Trp residues are not uniformly distributed through the membrane but are concentrated at the periplasmic side of the complex. In addition, Trp residues are not randomly aligned. Within the protein subunits, many form hydrogen bonds with carbonyl oxygens of the main chain, thereby stabilizing the protein. On the surface of the molecule, they are correctly positioned to form hydrogen bonds with the lipid head groups while their hydrophobic rings are immersed in the lipid part of the bilayer. These observations suggest that Trp residues are involved in the translocation of protein through the membrane and that following translocation, Trp residues serve as anchors on the periplasmic side of the membrane. RP SCHIFFER, M (reprint author), ARGONNE NATL LAB,BIOL & MED RES DIV,ARGONNE,IL 60439, USA. FU NIGMS NIH HHS [GM36598] NR 15 TC 301 Z9 304 U1 4 U2 10 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0269-2139 J9 PROTEIN ENG JI Protein Eng. PD APR PY 1992 VL 5 IS 3 BP 213 EP 214 DI 10.1093/protein/5.3.213 PG 2 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU212 UT WOS:A1992HU21200003 PM 1409540 ER PT J AU BROCKERHOFF, SE EDMONDS, CG DAVIS, TN AF BROCKERHOFF, SE EDMONDS, CG DAVIS, TN TI STRUCTURAL-ANALYSIS OF WILD-TYPE AND MUTANT YEAST CALMODULINS BY LIMITED PROTEOLYSIS AND ELECTROSPRAY IONIZATION MASS-SPECTROMETRY SO PROTEIN SCIENCE LA English DT Article DE CALCIUM-BINDING PROPERTIES; CALMODULIN; ESI MASS SPECTROMETRY; MUTANT; WILD TYPE; YEAST ID SACCHAROMYCES-CEREVISIAE; BINDING PROTEINS; BOVINE BRAIN; TROPONIN-C; FRAGMENTS; SEQUENCE; GENE; POLYPEPTIDES; RESOLUTION; VERTEBRATE AB Calmodulin from Saccharomyces cerevisiae was expressed in Escherichia coli and purified. The purified protein was structurally characterized using limited proteolysis followed by ESI mass spectrometry to identify the fragments. In the presence of Ca2+, yeast calmodulin is sequentially cleaved at arginine 126, then lysine 115, and finally at lysine 77. The rapid cleavage at Arg-126 suggests that the fourth Ca2+-binding loop does not bind Ca2+. In the presence of EGTA, yeast calmodulin is more susceptible to proteolysis and is preferentially cleaved at Lys-106. In addition, mutant proteins carrying I1OON, E104V or both mutations, which together confer temperature sensitivity to yeast, were characterized. The mutant proteins are more susceptible than wild-type calmodulin to proteolysis, suggesting that each mutation disrupts the structure of calmodulin. Furthermore, whereas wild-type calmodulin is cut at Lys-106 only in the presence of EGTA, this cleavage site is accessible in the mutants in the presence of Ca2+ as well. In these ways, the structural consequence of each mutation mimics the loss of a calcium ion in the third loop. In addition, although wild-type calmodulin binds to four proteins in a yeast crude extract in the presence of Ca2+, the mutants bind only to a subset of these. Thus, the inability to adopt the stable Ca2+-bound conformation in the third Ca2+-binding loop alters the ability of calmodulin to interact with yeast proteins in a Ca2+-dependent manner. C1 UNIV WASHINGTON, DEPT BIOCHEM, SEATTLE, WA 98195 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. OI Davis, Trisha/0000-0003-4797-3152 FU NHGRI NIH HHS [HG00327]; NIGMS NIH HHS [GM40506] NR 51 TC 35 Z9 37 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0961-8368 J9 PROTEIN SCI JI Protein Sci. PD APR PY 1992 VL 1 IS 4 BP 504 EP 516 PG 13 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA HT175 UT WOS:A1992HT17500005 PM 1304352 ER PT J AU ARNOLD, GE DUNKER, AK JOHNS, SJ DOUTHART, RJ AF ARNOLD, GE DUNKER, AK JOHNS, SJ DOUTHART, RJ TI USE OF CONDITIONAL PROBABILITIES FOR DETERMINING RELATIONSHIPS BETWEEN AMINO-ACID-SEQUENCE AND PROTEIN SECONDARY STRUCTURE SO PROTEINS-STRUCTURE FUNCTION AND GENETICS LA English DT Article DE PROTEIN SECONDARY STRUCTURE; AMINO ACID SEQUENCE; DISTRIBUTIONS ID GLOBULAR-PROTEINS; STRUCTURE PREDICTION; HYDROPHOBIC MOMENT; ALPHA-HELICES; RECOGNITION; SIMILARITY; NMR AB The conditional probability, P(sigma\x), is a statement of the probability that the value of sigma will be found given the prior information that a value of x has been observed. Here sigma represents any one of the secondary structure types, alpha, beta, tau, and rho for helix, sheet, turn, and random, respectively, and x represents a sequence attribute, including, but not limited to: (1) hydropathy; (2) hydrophobic moments assuming helix and sheet; (3) Richardson and Richardson helical N-cap and C-cap values; (4) Chou-Fasman conformational parameters for helix, P(alpha), for sheet, P(beta), and for turn, P(tau); and (5) Garnier, Osguthorpe, and Robson (GOR) information values for helix, I(alpha), for sheet, I(beta), for turn, I(tau), and for random structure, I(rho). Plots of P(sigma\x) vs. x are demonstrated to provide information about the correlation between structure and attribute, sigma and x. The separations between different P(sigma\x) vs. x curves indicate the capacity of a given attribute to discriminate between different secondary structural types and permit comparison of different attributes. P(alpha\x), P(beta\x), P(tau\x) and P(rho\x) vs. x plots show that the most useful attributes for discriminating helix are, in order: hydrophobic moment assuming helix > P(alpha) > > N-cap > C-cap almost-equal-to I(alpha) almost-equal-to I(tau). The information value for turns, I(tau), was found to discriminate helix better than turns. Discrimination for sheet was found to be in the following order: I(beta) >> P(beta) almost-equal-to hydropathy > I(rho) almost-equal-to hydrophobic moment assuming sheet. Three attributes, at their low values, were found to give significant discrimination for the absence of helix: I(alpha) almost-equal-to P(alpha) almost-equal-to hydrophobic moment assuming helix. Also, three other attributes were found to indicate the absence of sheet: P(beta) >> I(rho) almost-equal-to hydropathy. Indications of the absence of sigma could be as useful for some applications as the indication of the presence of sigma. C1 WASHINGTON STATE UNIV, DEPT BIOCHEM & BIOPHYS, PULLMAN, WA 99164 USA. PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. WASHINGTON STATE UNIV, CTR VISUALIZAT ANAL & DESIGN MOLEC SCI, PULLMAN, WA 99164 USA. PACIFIC NW LAB, CTR LIFE SCI, RICHLAND, WA 99352 USA. FU NCRR NIH HHS [RR07097]; NIGMS NIH HHS [GM25937] NR 53 TC 13 Z9 13 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0887-3585 J9 PROTEINS JI Proteins PD APR PY 1992 VL 12 IS 4 BP 382 EP 399 DI 10.1002/prot.340120410 PG 18 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA HJ852 UT WOS:A1992HJ85200009 PM 1579571 ER PT J AU SOMORJAI, GA STARKE, U AF SOMORJAI, GA STARKE, U TI MONOLAYER SURFACE-STRUCTURE ANALYSIS SO PURE AND APPLIED CHEMISTRY LA English DT Article; Proceedings Paper CT INTERNATIONAL CONGRESS OF ANALYTICAL SCIENCES CY AUG 25-31, 1991 CL CHIBA, JAPAN ID RECONSTRUCTION; ADSORPTION; PLATINUM; RH(111); CO AB Modern surface science techniques provide atomic spatial resolution (scanning tunneling microscopy), improved time and energy resolution (laser spectroscopies) and determination of structure on both sides of the surface chemical bonds (tensor LEED). Solid-solid, solid-liquid, and liquid-gas interfaces are increasingly investigated in addition to the solid-gas interface. The restructuring of surfaces during chemisorption and catalytic reactions lead to the development of new dynamic models for explaining surface reactivity. The knowledge of surface structure, bonding and gas-surface interactions has been utilized to gain a better understanding of adsorption, heterogeneous catalysis, adhesion, lubrication, optical and electron transport properties. Examples will be given and discussed. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP SOMORJAI, GA (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DEPT CHEM,BERKELEY,CA 94720, USA. NR 25 TC 9 Z9 9 U1 0 U2 2 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0033-4545 J9 PURE APPL CHEM JI Pure Appl. Chem. PD APR PY 1992 VL 64 IS 4 BP 509 EP 527 DI 10.1351/pac199264040509 PG 19 WC Chemistry, Multidisciplinary SC Chemistry GA HM383 UT WOS:A1992HM38300006 ER PT J AU PELLIN, MJ AF PELLIN, MJ TI LASER IONIZATION OF SPUTTERED ATOMS - TRACE ANALYSIS OF SAMPLES WITH ATOMIC DIMENSIONS - (TECHNICAL REPORT) SO PURE AND APPLIED CHEMISTRY LA English DT Article ID NONRESONANT MULTIPHOTON IONIZATION; ION MASS-SPECTROMETRY; SURFACE-ANALYSIS; SECONDARY ION; RESONANCE IONIZATION; CHEMICAL SURFACE; SPECTROSCOPY; SIMS; NEUTRALS; DEPTH AB Many technologically important problems involve trace analysis of samples containing only a few atoms. These problems are particularly difficult since they present the simultaneous requirements of efficient sample utilization (high useful yield) and good discrimination (trace impurities). For many analytical techniques these requirements are mutually exclusive. Recent experimental work using laser ionization of sputtered secondary neutral atoms has demonstrated that this technique can achieve part per trillion detection efficiencies with useful yields in excess of 1%. This paper will review and assess this new technique. RP PELLIN, MJ (reprint author), ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439, USA. RI Pellin, Michael/B-5897-2008 OI Pellin, Michael/0000-0002-8149-9768 NR 67 TC 2 Z9 2 U1 0 U2 0 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0033-4545 J9 PURE APPL CHEM JI Pure Appl. Chem. PD APR PY 1992 VL 64 IS 4 BP 591 EP 598 DI 10.1351/pac199264040591 PG 8 WC Chemistry, Multidisciplinary SC Chemistry GA HM383 UT WOS:A1992HM38300011 ER PT J AU HOLROYD, RA NORTON, E AF HOLROYD, RA NORTON, E TI RADIATION-CHEMISTRY OF TETRAMETHYLGERMANE SO RADIATION PHYSICS AND CHEMISTRY LA English DT Article ID LIQUIDS AB A study of the Co-60 gamma-irradiation of tetramethylgermane is reported. The major products are identified and their yields given. Both carbon-hydrogen and carbon-germanium bond scission occur. Hydrogen and methane are the major gaseous products. Ethyltrimethylgermane, hexamethyldigermane, bis(trimethylgermyl)methane and bis(trimethylgermyl)ethane are the major heavier products. The total yield of products indicates that the yield of disappearance of tetramethylgermane, G[-Ge(CH3)4], is 10.2 molecules per 100 eV absorbed. An (unidentified) product is formed which captures electrons. RP HOLROYD, RA (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. NR 7 TC 3 Z9 3 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0146-5724 J9 RADIAT PHYS CHEM JI Radiat. Phys. Chem. PD APR PY 1992 VL 39 IS 4 BP 345 EP 347 PG 3 WC Chemistry, Physical; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical SC Chemistry; Nuclear Science & Technology; Physics GA HR681 UT WOS:A1992HR68100007 ER PT J AU BOIS, FY PAXMAN, DG AF BOIS, FY PAXMAN, DG TI AN ANALYSIS OF EXPOSURE RATE EFFECTS FOR BENZENE USING A PHYSIOLOGICALLY BASED PHARMACOKINETIC MODEL SO REGULATORY TOXICOLOGY AND PHARMACOLOGY LA English DT Article ID B6C3F1 MICE; PHENOL; METABOLISM; DISPOSITION; VARIABILITY; INVIVO; HYDROQUINONE; PRINCIPLES; INHALATION; RISK C1 UNIV CALIF BERKELEY,SCH PUBL HLTH,CTR OCCUPAT & ENVIRONM HLTH,BERKELEY,CA 94720. RP BOIS, FY (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,INDOOR AIR PROGRAM,MAIL STOP 90-3058,BERKELEY,CA 94720, USA. RI Bois, Frederic/E-9241-2012 OI Bois, Frederic/0000-0002-4154-0391 FU NIEHS NIH HHS [P42 ES04705] NR 42 TC 24 Z9 24 U1 0 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0273-2300 J9 REGUL TOXICOL PHARM JI Regul. Toxicol. Pharmacol. PD APR PY 1992 VL 15 IS 2 BP 122 EP 136 DI 10.1016/0273-2300(92)90044-A PN 1 PG 15 WC Medicine, Legal; Pharmacology & Pharmacy; Toxicology SC Legal Medicine; Pharmacology & Pharmacy; Toxicology GA HT560 UT WOS:A1992HT56000002 PM 1626064 ER PT J AU NUGENT, KA TREBES, JE AF NUGENT, KA TREBES, JE TI COHERENCE MEASUREMENT TECHNIQUE FOR SHORT-WAVELENGTH LIGHT-SOURCES SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID RAY AB This paper proposes and analyzes a technique that will allow the spatial coherence properties of short-wavelength radiation sources to be measured. The technique is based on the analysis of the partially coherent diffraction patterns produced by a uniformly redundant array. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP NUGENT, KA (reprint author), UNIV MELBOURNE,SCH PHYS,PARKVILLE,VIC 3052,AUSTRALIA. RI Nugent, Keith/J-2699-2012; Nugent, Keith/I-4154-2016 OI Nugent, Keith/0000-0003-1522-8991; Nugent, Keith/0000-0002-4281-3478 NR 18 TC 19 Z9 19 U1 1 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2146 EP 2151 DI 10.1063/1.1143130 PN 1 PG 6 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL552 UT WOS:A1992HL55200006 ER PT J AU ZHANG, J SHELDON, P AHRENKIEL, RK AF ZHANG, J SHELDON, P AHRENKIEL, RK TI A HALL PROBE TECHNIQUE FOR CHARACTERIZING HIGH-TEMPERATURE SUPERCONDUCTORS SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID FILMS AB Thin-film GaAs Hall probes were fabricated by molecular beam epitaxy technology. A contactless technique was developed to characterize thin-film, high-temperature superconducting (HTSC) materials. The Hall probes detected the ac magnetic flux penetration through the high-temperature superconducting materials. The Hall detector has advantages over the mutual inductance magnetic flux detector. C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. RP ZHANG, J (reprint author), UNIV COLORADO,DEPT ELECT & COMP ENGN,BOULDER,CO 80309, USA. NR 6 TC 1 Z9 1 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2259 EP 2262 DI 10.1063/1.1143147 PN 1 PG 4 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL552 UT WOS:A1992HL55200024 ER PT J AU NOWLIN, CH AF NOWLIN, CH TI LOW-NOISE LUMPED-ELEMENT TIMING FILTERS WITH RISE-TIME INVARIANT CROSSOVER TIMES SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article AB Herein are described low-noise, lumped-element pulse-shaping filters that produce output pulses with zero-crossing times that are invariant with changes in input pulse amplitude and invariant with changes in input pulse rise time for input pulses with linearly increasing leading edges. Design equations and circuit diagrams are given. In addition, equations are derived that show that, in general, the noise-caused timing variance is inversely proportional to the crossover time, provided the crossover time occurs during the linearly increasing leading edge. The noise-caused timing variances of these lumped-element filters are only a few percent worse than the best that can be achieved for the same crossover time with a conventional delay-line constant-fraction filter in cascade with a resistance-capacitance low-pass filter. Neither delay lines nor delay-line approximates are used in these filters. RP NOWLIN, CH (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 7 TC 12 Z9 12 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2322 EP 2326 DI 10.1063/1.1143828 PN 1 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL552 UT WOS:A1992HL55200034 ER PT J AU BROWN, IG AF BROWN, IG TI METAL VAPOR VACUUM-ARC ION SOURCES SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID ALLOY CATHODES; BEAMS; PLASMA; IMPLANTATION; TRANSPORT; EROSION; GENERATION; COMPOUND; SPECTRA AB High current beams of metal ions can be produced efficiently using a metal vapor vacuum arc to establish the metal plasma from which the beam is formed. Pulsed beam currents of several amperes of metallic ions have been produced from nearly all of the solid metals of the periodic table, and in some recent tests dc beams have been produced also. Beam extraction voltage up to 100 kV has been used and since the ions produced in the vacuum arc plasma are in general multiply ionized the ion energy is up to several hundred keV. These kinds of sources are finding application for heavy-ion synchrotron injection, metallurgical ion implantation, and other uses. A number of different embodiments of the source have been developed at Berkeley and elsewhere around the world. Interesting features include multiple cathodes and the ability to switch between up to 18 separate cathode materials simply and quickly, and broad beam source versions (up to 50 cm diameter) as well as miniature versions (about "thumb size"). Here we review the design features, operational behavior, and beam performance characteristics of these sources from the perspective of the Berkeley program. RP BROWN, IG (reprint author), UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. NR 59 TC 25 Z9 27 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0034-6748 EI 1089-7623 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2351 EP 2356 DI 10.1063/1.1142927 PN 2 PG 6 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300002 ER PT J AU BROWN, IG DICKINSON, MR GALVIN, JE MACGILL, RA AF BROWN, IG DICKINSON, MR GALVIN, JE MACGILL, RA TI DEVELOPMENT OF A DC, BROAD BEAM, MEVVA ION-SOURCE SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS ID VAPOR VACUUM-ARC; EROSION AB We are developing an embodiment of metal vapor vacuum arc (Mevva) ion source which will operate dc and have a very large area beam. In preliminary testing, a dc titanium ion beam was formed with a current of approximately 0.6 A at an extraction voltage of 9 kV (about 18 keV ion energy, by virtue of the ion-charge state distribution) using an 18-cm-diameter set of multiaperture extraction grids. Separately, we have tested and formed a beam from a 50-cm-diameter (2000 cm2) set of grids using a pulsed plasma gun. This configuration appears to be very efficient in terms of plasma utilization, and we have formed beams with a diameter of 33 cm (FWHM) and ion current up to 7 A at an extraction voltage of 50 kV (about 100 keV mean ion energy) and up to 20 A peak at the current overshoot part of the beam pulse. Here we describe this part of our Mevva development program and summarize the results obtained to date. RP BROWN, IG (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 19 TC 19 Z9 19 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2417 EP 2419 DI 10.1063/1.1142948 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300018 ER PT J AU ALTON, GD AF ALTON, GD TI A MULTIPLE-SAMPLE, CESIUM-SPUTTER, NEGATIVE-ION SOURCE SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS AB A multiple-sample, cesium-sputter, negative-ion source which permits sample changes without disruption of on-line tandem electrostatic accelerator operations is described. The source is equipped with provisions for remotely selecting and moving into the beam position any one of 60 samples by means of stepping motors equipped with absolute shaft encoders. A spherical-sector cesium ionizer is used to produce the cesium beam for sputtering the sample material. The source is equipped with a three-element electrode system which has been designed to increase the perveance for cesium ion beam generation and to improve negative ion beam extraction from the source. RP ALTON, GD (reprint author), OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831, USA. NR 10 TC 3 Z9 3 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2450 EP 2452 DI 10.1063/1.1142907 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300029 ER PT J AU ALTON, GD AF ALTON, GD TI A SIMPLE, HIGH-EFFICIENCY, NEGATIVE SURFACE-IONIZATION SOURCE SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS ID INTENSE BEAMS; CESIUM AB A spherical-geometry, self-extraction negative ion source has been designed and fabricated. The source utilizes direct surface ionization to form negative ion beams resulting from interactions between high electron affinity gaseous elemental or molecular materials and a negatively biased, spherical-sector LaB6 surface ionizer maintained at approximately 1300 K. The design features of this source and principles upon which the source is based are discussed in this report. RP ALTON, GD (reprint author), OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831, USA. NR 18 TC 7 Z9 7 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2453 EP 2454 DI 10.1063/1.1142908 PN 2 PG 2 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300030 ER PT J AU ALTON, GD AF ALTON, GD TI A PULSED-MODE, HIGH-INTENSITY, HEAVY NEGATIVE-ION SOURCE SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS AB A high intensity, plasma-sputter, negative ion source, which utilizes multicusp, magnetic-field, plasma confinement techniques is described. The source is an axial-geometry version of a radial-geometry source which has demonstrated a pulsed-mode peak intensity level of several mA for a wide spectrum of heavy negative ion species. The mechanical design features include provisions for fast interchange of sputter samples, ease of maintenance, direct cooling of the discharge chamber, and the use of easily replaced coaxial LaB6 cathodes. RP ALTON, GD (reprint author), OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831, USA. NR 14 TC 1 Z9 1 U1 1 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2455 EP 2457 DI 10.1063/1.1142909 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300031 ER PT J AU VOLK, K KLEIN, H LEUNG, KN AF VOLK, K KLEIN, H LEUNG, KN TI BEAM INVESTIGATIONS AT A MULTICUSP ION-SOURCE SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS AB In cooperation with the Lawrence Berkeley Laboratory, a multicusp ion source has been investigated. The goal of these investigations is to generate a nearly pure atomic nitrogen (N+) ion beam. To achieve this, the discharge chamber is divided into two parts of different plasma parameters by means of a filter magnetic field. As beam diagnostics, a bending magnet and a faraday cup have been used. Measurements of the beam current density and the ion composition for a wide range of discharge conditions have been performed. By using a Langmuir probe, we have performed measurements of electron temperature and electron density. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP VOLK, K (reprint author), UNIV FRANKFURT,INST ANGEW PHYS,ROBERT MAYER STR 2-4,W-6000 FRANKFURT,GERMANY. NR 3 TC 1 Z9 1 U1 1 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2607 EP 2609 DI 10.1063/1.1142852 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300077 ER PT J AU HERSHCOVITCH, AI ALESSI, JG DEVITO, B KPONOU, AE AF HERSHCOVITCH, AI ALESSI, JG DEVITO, B KPONOU, AE TI THE NEW BNL POLARIZED NEGATIVE-ION SOURCE SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS ID HYDROGEN AB A new ground state source of negative hydrogen ions with polarized nuclei (H-) is being developed at BNL. Extensive developmental research has been aimed at improving each element of (H-) production: cold H-degrees beam, spin selection and focusing magnets, and ionizer. These elements have recently been integrated into a source. A first test with the accommodator nozzle cooled only to liquid nitrogen temperatures resulted in 5-mu-A of H-. Tests at liquid helium temperatures are now beginning. RP HERSHCOVITCH, AI (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2628 EP 2630 DI 10.1063/1.1142860 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300084 ER PT J AU HISKES, JR AF HISKES, JR TI ATOMIC PROCESSES, CROSS-SECTIONS, AND REACTION-RATES NECESSARY FOR MODELING HYDROGEN NEGATIVE-ION SOURCES AND IDENTIFICATION OF OPTIMUM H-CURRENT DENSITIES SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS ID DISSOCIATIVE ATTACHMENT; H-2; EXCITATION AB The principal electron excitation cross sections for vibrational excitation in a hydrogen discharge are reported. In the first chamber of a two-chamber hydrogen negative-ion-source system subject to the beam-line constraint of a maximum gas pressure, the density of vibrationally excited molecules reaches an asymptote for increasing discharge current or the equivalent fast electron density. Operating near this first-chamber asymptote, there exists a spatially dependent maximum negative-ion density in the second chamber. With the extraction grid placed at this maximum the optimum performance of a hydrogen-based system is determined. This optimum performance provides a criterion for the selection of differing source types for fusion applications. RP HISKES, JR (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 14 TC 9 Z9 9 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2702 EP 2704 DI 10.1063/1.1142828 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300102 ER PT J AU KWAN, JW ANDERSON, OA CHAN, CF COOPER, WS DEVRIES, GJ KUNKEL, WB LEUNG, KN LIETZKE, AF STEELE, WF VANOS, CFA WELLS, RP WILLIAMS, MD AF KWAN, JW ANDERSON, OA CHAN, CF COOPER, WS DEVRIES, GJ KUNKEL, WB LEUNG, KN LIETZKE, AF STEELE, WF VANOS, CFA WELLS, RP WILLIAMS, MD TI DEVELOPMENT OF A DC LOW-PRESSURE D- SURFACE-CONVERSION SOURCE USING A 10-CM-DIAM SOLID BARIUM CONVERTER SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS ID NEGATIVE-ION SOURCE; H PRODUCTION; EXTRACTION; DISCHARGE AB A D- surface-conversion source using a solid barium converter is designed for steady-state operation to produce 200 mA of D-. A similar ion source of twice the size as the one discussed here will meet the requirements set by the present US-ITER neutral beam injector design. Among the possible types of ion sources being considered for the US-ITER neutral beam design, the barium converter surface-conversion source is the only kind that does not use cesium in the discharge. This absence of cesium will minimize the number of accelerator breakdowns. RP KWAN, JW (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 15 TC 6 Z9 6 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2705 EP 2707 DI 10.1063/1.1142829 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300103 ER PT J AU PRELEC, K ALESSI, JG AF PRELEC, K ALESSI, JG TI BNL VOLUME H- SOURCE SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS AB The volume H- ion source under development at Brookhaven is unique in that it has a toroidal plasma region, which feeds ions into the central extraction region through a conically shaped filter field. In pulsed operation, it produces 25 mA of H- in a 1 cm2 aperture, with an electron-to-H- ratio of almost-equal-to 3. At 19 mA, a normalized, 90% emittance of 0.44-pi mm mrad has been measured. Up to 50 mA has been extracted through a 1.87 cm2 aperture. Although not designed for steady state operation, up to 6 mA has been extracted dc. The addition of xenon to the discharge was found to improve the source output by 20%-70%. The circular magnetic cusp field geometry was found to be more favorable than radial cusp fields. RP PRELEC, K (reprint author), BROOKHAVEN NATL LAB,DEPT AGS,UPTON,NY 11973, USA. NR 4 TC 1 Z9 1 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2717 EP 2719 DI 10.1063/1.1142833 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300107 ER PT J AU SMITH, HV SHERMAN, JD GEISIK, C ALLISON, P AF SMITH, HV SHERMAN, JD GEISIK, C ALLISON, P TI H- TEMPERATURE DEPENDENCES IN A PENNING SURFACE-PLASMA SOURCE SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS AB Simple analysis of the nearly Maxwellian angular distributions of the ribbon H ion beams extracted from a long, narrow slit on the 8X source yields the H- temperature, kT(H-). The derived kT(H-) are 0.1-0.3 eV for a 2-A dc discharge and 0.7-1.3 eV for a 400-A pulsed discharge. Because this diagnostic method relies on simple electronic techniques, it allows rapid study of the dependences of kT(H-) on the source parameters, such as gas flow and discharge current. These variations of kT(H-) in the 8X source are qualitatively similar to those observed for the H-atom temperature, kT(H0), in the 4X source, another Penning surface-plasma source. RP SMITH, HV (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. NR 12 TC 5 Z9 5 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2723 EP 2725 DI 10.1063/1.1142835 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300109 ER PT J AU ANDERSON, OA CHAN, CF LEUNG, KN SOROKA, L WELLS, RP AF ANDERSON, OA CHAN, CF LEUNG, KN SOROKA, L WELLS, RP TI LOW-ENERGY INJECTOR DESIGN FOR SSC SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS AB An injector is being designed for SSC that will deliver 30 mA of H- at 35 keV, matched to the RFQ input. The H- ions are produced by a new rf-driven multicusp source that uses no cesium. The ions are extracted by a high-perveance accelerator designed to handle the large electron content of this type of source. The low-energy beam transport system (LEBT) uses electrostatic focusing; gas-neutralized magnetic focusing is ruled out because pulse lengths (7-35-mu-s) are shorter than plasma buildup times and because pulse intervals are longer than plasma decay times. Plasma buildup is prevented by the LEBT electric fields, so the system is noise free and stable. The advantages of electrostatic LEBTs were demonstrated by a previous design tested at LBL, which showed negligible emittance growth, confirming the results of computer modeling. The object of our new LEBT design is to preserve the emittance of the rf-driven source, which is less than 0.01 pi-mrad cm (normalized rms), and thereby produce a beam well within the SSC RFQ acceptance of 0.018 pi-mrad cm. C1 PARTICLE BEAM CONSULTANTS,BERKELEY,CA. RP ANDERSON, OA (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 4 TC 1 Z9 1 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2738 EP 2740 DI 10.1063/1.1142840 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300114 ER PT J AU MCDONALD, DS BACHMAN, DA DIVERGILIO, WF KUNKEL, WB LEUNG, KN WILLIAMS, MD AF MCDONALD, DS BACHMAN, DA DIVERGILIO, WF KUNKEL, WB LEUNG, KN WILLIAMS, MD TI PRELIMINARY-STUDY ON THE CHARACTERISTICS OF A RF-DRIVEN H- SOURCE SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS AB The use of a rf-induction discharge as a H- source is attractive for long life, pulsed, or cw operation. Recently, a new rf-driven, magnetically filtered multicusp source has been developed at LBL to generate volume-produced H- beams with extracted current densities higher than 200 mA/cm2. A total current of approximately 40 mA can be obtained with a 5.6 mm diam aperture and a rf input power of 50 kW. The operating frequency is approximately 2 MHz. As part of a study of the H- production mechanism in rf plasmas, measurements of the electron energy distribution have been undertaken. Initial measurements were made with a modification of the standard Langmuir probe method. The probe characteristics were sampled at different phases of the rf cycle. Results show that the electron density does not vary significantly during the rf cycle. The dependence of electron density and temperature on source pressure and axial position has been investigated and the results are summarized. C1 ION SOURCERY LTD,SAN LUIS OBISPO,CA 93401. RP MCDONALD, DS (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 2 TC 5 Z9 5 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2741 EP 2743 DI 10.1063/1.1142841 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300115 ER PT J AU YOUNG, AT STUTZIN, GC CHEN, P KUNKEL, WB LEUNG, KN AF YOUNG, AT STUTZIN, GC CHEN, P KUNKEL, WB LEUNG, KN TI MEASUREMENT OF ATOMIC AND MOLECULAR-HYDROGEN IN A TANDEM MAGNETIC MULTICUSP H- ION-SOURCE BY VUV SPECTROSCOPY SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS ID VIBRATIONAL-EXCITATION; DISSOCIATION; SURFACES; H2+ AB The populations of ground electronic state atomic hydrogen and ground electronic state, vibrationally-rotationally excited hydrogen molecule in a negative hydrogen ion source discharge have been measured using vacuum ultraviolet (VUV) laser absorption spectroscopy. These populations have been measured under a variety of discharge conditions in two different regions of a tandem chamber ion source. Preliminary results of the measurements in the driver region and filter region are given. It is observed that the atomic hydrogen density decreases as one goes from the driver to the filter region. This indicates that the surfaces directly adjacent to the filter region are net sinks for hydrogen atoms. In contrast, the molecular vibrational population distribution shows only a small difference between the two regions, indicating that these surfaces are not net sinks for the excited molecules. RP YOUNG, AT (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. RI Chen, Pin/B-1112-2008 OI Chen, Pin/0000-0003-1195-9666 NR 9 TC 3 Z9 3 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2744 EP 2746 DI 10.1063/1.1142842 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300116 ER PT J AU BECKER, R HERRMANNSFELDT, WB AF BECKER, R HERRMANNSFELDT, WB TI IGUN - A PROGRAM FOR THE SIMULATION OF POSITIVE-ION EXTRACTION INCLUDING MAGNETIC-FIELDS SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS AB IGUN is a program for the simulation of positive ion extraction from plasmas. It is based on the well known program EGUN for the calculation of electron and ion trajectories in electron guns and lenses. The mathematical treatment of the plasma sheath is based on a simple analytical model, which provides a numerically stable calculation of the sheath potentials. In contrast to other ion extraction programs, IGUN is able to determine the extracted ion current in succeeding cycles of iteration by itself. However, it is also possible to set values of current, plasma density, or ion current density. Either axisymmetric or rectangular coordinates can be used, including axisymmetric or transverse magnetic fields. C1 STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. RP BECKER, R (reprint author), JW GOETHE UNIV,INST ANGEW PHYS,W-6000 FRANKFURT,GERMANY. NR 10 TC 135 Z9 137 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2756 EP 2758 DI 10.1063/1.1142795 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300120 ER PT J AU MICHAUT, C DEVYNCK, P BACAL, M SLEDZIEWSKI, Z VALCKX, FPG WHEALTON, JH RARIDON, RJ AF MICHAUT, C DEVYNCK, P BACAL, M SLEDZIEWSKI, Z VALCKX, FPG WHEALTON, JH RARIDON, RJ TI NEGATIVE-ION BEAM ACCELERATION AND TRANSPORT SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS AB The optimum conditions for focusing a negative ion beam are discussed. The distribution of the current between the Faraday cup and a large ring collector, surrounding this cup, has been investigated experimentally and theoretically, at constant extraction voltage (1.9 kV), with the acceleration voltage being varied in a wide range. The effects of beam space charge, negative ion temperature, and stripping are analyzed. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP MICHAUT, C (reprint author), ECOLE POLYTECH,CNRS,PHYS MILIEUX IONISES LAB,F-91128 PALAISEAU,FRANCE. NR 5 TC 4 Z9 4 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2774 EP 2775 DI 10.1063/1.1142801 PN 2 PG 2 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300126 ER PT J AU PENETRANTE, BM SCHNEIDER, D MARRS, RE BARDSLEY, JN AF PENETRANTE, BM SCHNEIDER, D MARRS, RE BARDSLEY, JN TI MODELING THE ION-SOURCE PERFORMANCE OF AN ELECTRON-BEAM ION TRAP (INVITED) SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS ID HIGHLY CHARGED IONS; CROSS-SECTIONS AB Several key features of the electron-beam ion trap (EBIT) enable it to provide superior ion-source performance for many applications requiring ultra-high-charged ions. This paper briefly reviews these features and the operating conditions in the existing EBITs. The present performance of the EBIT as an ion source is demonstrated by producing and extracting ions up to Th80+ and U70+ at microsecond-wide ion beam pulses of about 10(4) ions per second. Using as examples the production of U92+, U90+, and Dy66+, modeling results are presented to show how the fundamental processes limit the quality and quantity of ions that can be obtained from an upscaled EBIT. RP PENETRANTE, BM (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DIV HIGH TEMP PHYS,LIVERMORE,CA 94550, USA. NR 18 TC 10 Z9 10 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2806 EP 2811 DI 10.1063/1.1142812 PN 2 PG 6 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300134 ER PT J AU STIEBING, KE HOFMANN, D SCHMIDTBOCKING, H BETHGE, K STREITZ, H FROHLICH, O SCHEMPP, A KLEIN, H ZSCHORNACK, G LYNEIS, C AF STIEBING, KE HOFMANN, D SCHMIDTBOCKING, H BETHGE, K STREITZ, H FROHLICH, O SCHEMPP, A KLEIN, H ZSCHORNACK, G LYNEIS, C TI THE FRANKFURT ECR-RFQ FACILITY SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS AB An ion beam facility for high-intensity beams of highly charged ions in the energy range between 1 and 200 keV/u has been funded and will be installed in 1992 at the Institut fur Kernphysik, Frankfurt am Main, Germany. The facility is based on a 14.6 GHz ECR ion source and a variable-energy RFQ as postaccelerator. The facility is intended for atomicphysics and materials research. C1 UNIV FRANKFURT,INST ANGEW PHYS,W-6000 FRANKFURT,GERMANY. TECH UNIV DRESDEN,INST KERN & ATOMPHYS,SEKT PHYS,O-8027 DRESDEN,GERMANY. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP STIEBING, KE (reprint author), UNIV FRANKFURT,INST KERNPHYS,W-6000 FRANKFURT,GERMANY. NR 7 TC 7 Z9 8 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2897 EP 2899 DI 10.1063/1.1142791 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300164 ER PT J AU BROWN, I AF BROWN, I TI PROCEEDINGS OF THE 4TH INTERNATIONAL-CONFERENCE ON ION SOURCES - 30 SEPTEMBER 4 OCTOBER 1991 - BENSHEIM, GERMANY - SUMMARY SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Editorial Material CT 4TH INTERNATIONAL CONF ON ION SOURCES ( ICIS 91 ) CY SEP 30-OCT 04, 1991 CL BENSHEIM, GERMANY SP GESELL SCHWERIONENFORSCH, DEUT FORSCHUNGSGEMEINSCH, BALZERS, AMER PHYS SOC, AMER VACUUM SOC, DEUT PHYS GESELL, EUROPEAN PHYS SOC, INT UNION PURE & APPL PHYS RP BROWN, I (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD APR PY 1992 VL 63 IS 4 BP 2910 EP 2910 PN 2 PG 1 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA HL553 UT WOS:A1992HL55300169 ER PT J AU MYERS, SM BASKES, MI BIRNBAUM, HK CORBETT, JW DELEO, GG ESTREICHER, SK HALLER, EE JENA, P JOHNSON, NM KIRCHHEIM, R PEARTON, SJ STAVOLA, MJ AF MYERS, SM BASKES, MI BIRNBAUM, HK CORBETT, JW DELEO, GG ESTREICHER, SK HALLER, EE JENA, P JOHNSON, NM KIRCHHEIM, R PEARTON, SJ STAVOLA, MJ TI HYDROGEN INTERACTIONS WITH DEFECTS IN CRYSTALLINE SOLIDS SO REVIEWS OF MODERN PHYSICS LA English DT Review ID ELECTRONIC-STRUCTURE CALCULATIONS; ION-IMPLANTED DEUTERIUM; EMBEDDED-ATOM METHOD; SHALLOW-ACCEPTOR IMPURITIES; SI-SIO2 INTERFACE DEFECTS; THERMAL DONOR FORMATION; HIGH-PURITY GERMANIUM; CENTERED INTERSTITIAL HYDROGEN; AUSTENITIC STAINLESS-STEEL; ULTRA-PURE GERMANIUM AB Hydrogen interactions with imperfections in crystalline metals and semiconductors are reviewed. Emphasis is given to mechanistic experiments and theoretical advances contributing to predictive understanding. Important directions for future research are discussed. C1 SANDIA NATL LABS, LIVERMORE, CA 94550 USA. UNIV ILLINOIS, MAT RES LAB, URBANA, IL 61801 USA. SUNY ALBANY, DEPT PHYS, ALBANY, NY 12222 USA. LEHIGH UNIV, DEPT PHYS, BETHLEHEM, PA 18015 USA. TEXAS TECH UNIV, DEPT PHYS, LUBBOCK, TX 79409 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV MAT & CHEM SCI, BERKELEY, CA 94720 USA. VIRGINIA COMMONWEALTH UNIV, DEPT PHYS, RICHMOND, VA 23284 USA. XEROX CORP, PALO ALTO RES CTR, PALO ALTO, CA 94304 USA. MAX PLANCK INST MET RES, INST WERKSTOFFWISSENSCH, W-7000 STUTTGART 80, GERMANY. AT&T BELL LABS, MURRAY HILL, NJ 07974 USA. RP SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. NR 544 TC 312 Z9 318 U1 8 U2 70 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0034-6861 EI 1539-0756 J9 REV MOD PHYS JI Rev. Mod. Phys. PD APR PY 1992 VL 64 IS 2 BP 559 EP 617 DI 10.1103/RevModPhys.64.559 PG 59 WC Physics, Multidisciplinary SC Physics GA HN233 UT WOS:A1992HN23300005 ER PT J AU BOUZAHER, A VERGERGAUGRY, JL BONNET, R AF BOUZAHER, A VERGERGAUGRY, JL BONNET, R TI DILATATION FIELD OF A REGULAR HEXAGONAL NETWORK OF MISFIT DISLOCATIONS - APPLICATION TO (111)SI//(111)COSI2 SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article ID ELASTIC FIELD C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,NATL CTR ELECTRON MICROSCOPY,BERKELEY,CA 94720. RP BOUZAHER, A (reprint author), INST NATL POLYTECH GRENOBLE,ECOLE NATL SPOR ELECTROCHIM & ELECTROMET GRENOBLE,F-38402 ST MARTIN DHERES,FRANCE. NR 19 TC 4 Z9 4 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0956-716X J9 SCRIPTA METALL MATER JI Scr. Metall. Materialia PD APR 1 PY 1992 VL 26 IS 7 BP 1107 EP 1112 DI 10.1016/0956-716X(92)90238-A PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA HK521 UT WOS:A1992HK52100018 ER PT J AU HONG, SI LAIRD, C AF HONG, SI LAIRD, C TI DEVIATIONS FROM COTTRELL-STOKES LAW IN CYCLIC DEFORMATION SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article ID AL SINGLE-CRYSTALS; STRESS; BEHAVIOR; CU-16 C1 UNIV PENN,DEPT MAT SCI & ENGN,PHILADELPHIA,PA 19104. RP HONG, SI (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV MAT SCI & TECHNOL,MS K762,LOS ALAMOS,NM 87545, USA. NR 25 TC 1 Z9 1 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0956-716X J9 SCRIPTA METALL MATER JI Scr. Metall. Materialia PD APR 1 PY 1992 VL 26 IS 7 BP 1113 EP 1118 DI 10.1016/0956-716X(92)90239-B PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA HK521 UT WOS:A1992HK52100019 ER PT J AU GARBEY, M KAPER, HG LEAF, GK MATKOWSKY, BJ AF GARBEY, M KAPER, HG LEAF, GK MATKOWSKY, BJ TI QUASI-PERIODIC WAVES AND THE TRANSFER OF STABILITY IN CONDENSED-PHASE SURFACE COMBUSTION SO SIAM JOURNAL ON APPLIED MATHEMATICS LA English DT Article DE COMBUSTION; BIFURCATION; TRAVELING WAVES; STANDING WAVES; TRANSITION OF STABILITY; QUASI-PERIODIC WAVES ID DEGENERATE HOPF BIFURCATIONS; SPIN COMBUSTION; GASLESS SYSTEMS; O(2) SYMMETRY; MODES; CLASSIFICATION AB This article is concerned with the structure and stability properties of a combustion front propagating in the axial direction along the outer surface of a cylindrical solid fuel element. A nonlinear analysis is given that explains the occurrence of spinning and standing wave patterns as bifurcations from a uniformly propagating plane circular front. Particular attention is given to a stability transfer mechanism between standing and spinning waves by means of quasi-periodic waves. C1 UNIV CLAUDE BERNARD LYON 1,ANAL NUMER LAB,VILLEURBANNE,FRANCE. NORTHWESTERN UNIV,DEPT ENGN SCI & APPL MATH,EVANSTON,IL 60208. RP GARBEY, M (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439, USA. RI Matkowsky, Bernard/B-7371-2009 NR 17 TC 8 Z9 8 U1 0 U2 1 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 SN 0036-1399 J9 SIAM J APPL MATH JI SIAM J. Appl. Math. PD APR PY 1992 VL 52 IS 2 BP 384 EP 395 DI 10.1137/0152021 PG 12 WC Mathematics, Applied SC Mathematics GA HL296 UT WOS:A1992HL29600006 ER PT J AU CHEN, PC AF CHEN, PC TI HEURISTIC SAMPLING - A METHOD FOR PREDICTING THE PERFORMANCE OF TREE SEARCHING PROGRAMS SO SIAM JOURNAL ON COMPUTING LA English DT Article DE HEURISTICS; STRATIFIED SAMPLING; SEARCH TREE; FEASIBILITY TESTING; COSTESTIMATION; MONTE-CARLO METHOD; ANALYSIS OF ALGORITHMS AB Determining the feasibility of a particular search program is important in practical situations, especially when the computation involved can easily require days, or even years. To help make such predictions, a simple procedure based on a stratified sampling approach is presented. This new method, which is called heuristic sampling, is a generalization of Knuth's original algorithm for estimating the efficiency of backtrack programs. With the aid of simple heuristics, this method can produce significantly more accurate cost estimates for commonly used tree search algorithms such as depth-first, breadth-first, best-first, and iterative-deepening. RP CHEN, PC (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 10 TC 18 Z9 18 U1 0 U2 0 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 SN 0097-5397 J9 SIAM J COMPUT JI SIAM J. Comput. PD APR PY 1992 VL 21 IS 2 BP 295 EP 315 DI 10.1137/0221022 PG 21 WC Computer Science, Theory & Methods; Mathematics, Applied SC Computer Science; Mathematics GA HL126 UT WOS:A1992HL12600007 ER PT J AU SZYLD, DB JONES, MT AF SZYLD, DB JONES, MT TI 2-STAGE AND MULTISPLITTING METHODS FOR THE PARALLEL SOLUTION OF LINEAR-SYSTEMS SO SIAM JOURNAL ON MATRIX ANALYSIS AND APPLICATIONS LA English DT Article DE SOLUTION OF LINEAR SYSTEMS; BLOCK ITERATIVE METHODS; PARALLEL METHODS ID SPLITTINGS AB Two-stage and multisplitting methods for the parallel solution of linear systems are studied. A two-stage multisplitting method is presented that reduces to each of the others in particular cases. Conditions for its convergence are given. In the particular case of a multisplitting method related to block Jacobi, it is shown that it is equivalent to a two-stage method with only one inner iteration per outer iteration. A fixed number of iterations of this method, say, p, is compared with a two-stage method with p inner iterations. The asymptotic rate of convergence of the first method is faster, but, depending on the structure of the matrix and the parallel architecture, it takes more time to converge. This is illustrated with numerical experiments. C1 ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439. RP SZYLD, DB (reprint author), TEMPLE UNIV,DEPT MATH,PHILADELPHIA,PA 19122, USA. RI Szyld, Daniel/G-1388-2014 OI Szyld, Daniel/0000-0001-8010-0391 NR 13 TC 52 Z9 61 U1 0 U2 0 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 SN 0895-4798 J9 SIAM J MATRIX ANAL A JI SIAM J. Matrix Anal. Appl. PD APR PY 1992 VL 13 IS 2 BP 671 EP 679 DI 10.1137/0613042 PG 9 WC Mathematics, Applied SC Mathematics GA HJ949 UT WOS:A1992HJ94900015 ER PT J AU SELVIN, S SCHULMAN, J MERRILL, DW AF SELVIN, S SCHULMAN, J MERRILL, DW TI DISTANCE AND RISK MEASURES FOR THE ANALYSIS OF SPATIAL DATA - A STUDY OF CHILDHOOD CANCERS SO SOCIAL SCIENCE & MEDICINE LA English DT Article DE DISTANCE; RELATIVE RISK; SPATIAL DATA; CHILDHOOD CANCER; SPATIAL ANALYSIS; BRAIN CANCER; LYMPHATIC CANCER AND LEUKEMIA ID DISEASE; POINT; CLUSTERS AB Three statistical approaches, used to detect spatial clusters of disease associated with a point source exposure, are applied to childhood cancer data for the city of San Francisco (1973-88). The distributions of incident cases of leukemia (51 cases), brain cancer (35 cases), and lymphatic cancer (37 cases) among individuals less than 21 years of age are described using three measures of clustering: distance on a geopolitical map, distance on a density equalized transformed map, and relative risk. The point source of exposure investigated is a large microwave tower located southwest of the center of the city (Sutro Tower). The three analytic approaches indicate that the patterns of the major childhood cancers are essentially random with respect to the point source. These results and a statistical model for spatial clustering are used to explore distance and risk measures in the analysis of spatial data. Both types of measures of spatial clustering are shown to perform similarly when a specific area of exposure can be defined. C1 MARCH DIMES BIRTH DEFECTS FDN,CALIF BIRTH DEFECTS MONITORING PROGRAM,EMERYVILLE,CA 94608. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV INFORMAT & COMP SCI,BERKELEY,CA 94720. RP SELVIN, S (reprint author), UNIV CALIF BERKELEY,DEPT BIOMED & ENVIRONM HLTH SCI,BERKELEY,CA 94720, USA. NR 11 TC 38 Z9 39 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0277-9536 J9 SOC SCI MED JI Soc. Sci. Med. PD APR PY 1992 VL 34 IS 7 BP 769 EP 777 DI 10.1016/0277-9536(92)90364-V PG 9 WC Public, Environmental & Occupational Health; Social Sciences, Biomedical SC Public, Environmental & Occupational Health; Biomedical Social Sciences GA HN338 UT WOS:A1992HN33800007 PM 1604371 ER PT J AU INHESTER, B BIRN, J HESSE, M AF INHESTER, B BIRN, J HESSE, M TI THE EVOLUTION OF LINE-TIED CORONAL ARCADES INCLUDING A CONVERGING FOOTPOINT MOTION SO SOLAR PHYSICS LA English DT Article ID FREE MAGNETIC-FIELDS; SOLAR ERUPTIVE PROCESSES; MASS EJECTIONS; RECONNECTION; PROMINENCES; INSTABILITIES; DISSIPATION; HELICITY; LIMITS; FLARES AB It has been demonstrated in the past that single, two-dimensional coronal arcades are very unlikely driven unstable by a simple shear of the photospheric footpoints of the magnetic field lines. By means of two-dimensional, time-dependent MHD simulations, we present evidence that a resistive instability can result if in addition to the footpoint shear a slow motion of the footpoints towards the photospheric neutral line is included. Unlike the model recently proposed by van Ballegooijen and Martens (1989), the photospheric footpoint velocity in our model is nonsingular and the shear dominates everywhere. Starting from a planar potential field geometry for the arcade, we find that after some time a current sheet is formed which is unstable with respect to the tearing instability. The time of its onset scales with the logarithm of the magnetic diffusivity assumed in our calculation. In its nonlinear phase, a quasi-stationary situation arises in the vicinity of the x-line with an almost constant reconnection rate. The height of the x-line above the photosphere and the distance of the separatrix footpoints remain almost constant in this phase, while the helical flux tube, formed above the neutral line, continuously grows in size. C1 MAX PLANCK INST AERON,W-411 KATLENBURG DUHM,GERMANY. RP INHESTER, B (reprint author), LOS ALAMOS NATL LAB,SPACE PLASMA PHYS GRP,LOS ALAMOS,NM 87545, USA. RI Hesse, Michael/D-2031-2012 NR 33 TC 79 Z9 79 U1 1 U2 2 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0038-0938 J9 SOL PHYS JI Sol. Phys. PD APR PY 1992 VL 138 IS 2 BP 257 EP 281 DI 10.1007/BF00151915 PG 25 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HX292 UT WOS:A1992HX29200004 ER PT J AU ROMERO, DB PORTER, CD TANNER, DB FORRO, L MANDRUS, D MIHALY, L CARR, GL WILLIAMS, GP AF ROMERO, DB PORTER, CD TANNER, DB FORRO, L MANDRUS, D MIHALY, L CARR, GL WILLIAMS, GP TI ON THE PHENOMENOLOGY OF THE INFRARED PROPERTIES OF THE COPPER-OXIDE SUPERCONDUCTORS SO SOLID STATE COMMUNICATIONS LA English DT Article ID NORMAL-STATE; CONDUCTIVITY; YBA2CU3O7; CRYSTAL; GAP AB The temperature dependent infrared conductivities of Bi2Sr2CaCu2O8 (T(c) congruent-to 82 K) and Bi2Sr2CuO6 (T(c) less-than-or-similar-to 5 K) are compared with non-Fermi liquid approaches to the normal state of the high T(c) superconductors. We find reasonable agreement with our data only for omega less-than-or-similar-to 0.12 eV. We attribute the remaining spectral weight to a low-energy excitation in copper-oxide superconductors doped well above the metal-insulator transition. C1 UNIV FLORIDA,DEPT PHYS,GAINESVILLE,FL 32611. SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794. GRUMMAN CORP RES CTR,BETHPAGE,NY 11714. BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE,UPTON,NY 11973. RI Mandrus, David/H-3090-2014 NR 18 TC 30 Z9 30 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD APR PY 1992 VL 82 IS 3 BP 183 EP 187 DI 10.1016/0038-1098(92)90261-7 PG 5 WC Physics, Condensed Matter SC Physics GA HR365 UT WOS:A1992HR36500009 ER PT J AU FUCHS, HD GREIN, CH CARDONA, M HANSEN, WL ITOH, K HALLER, EE AF FUCHS, HD GREIN, CH CARDONA, M HANSEN, WL ITOH, K HALLER, EE TI ISOTOPIC DISORDER-EFFECTS ON THE PHONONS IN GERMANIUM SO SOLID STATE COMMUNICATIONS LA English DT Article AB High-resolution (+/- 0.02 cm-1) Raman and infrared transmission (ir) measurements were used to study the effect of isotopic disorder on the vibrational properties of Ge crystals. Calculations using the coherent potential and the self-consistent Born approximations were performed and compared with the experiment. The linewidth of the Raman modes is predominantly determined by the anharmonic decay of the optical phonons into lower-energy phonons, with a characteristic decay time of 6.1 (+/- 0.1) ps in natural Ge. The phonon energies of the Raman active phonon and the transverse optical ir modes at the Brillouin zone boundary (L, K, W, X - critical point) are shifted by the isotopic disorder in the material. The frequency shifts and the line broadenings are in good agreement with the theoretical calculations. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,BERKELEY,CA 94720. RP FUCHS, HD (reprint author), MAX PLANCK INST FESTKORPERFORSCH,HEISENBERGSTR 1,W-7000 STUTTGART 80,GERMANY. RI Itoh, Kohei/C-5738-2014 NR 9 TC 29 Z9 29 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD APR PY 1992 VL 82 IS 4 BP 225 EP 228 DI 10.1016/0038-1098(92)90631-I PG 4 WC Physics, Condensed Matter SC Physics GA HR366 UT WOS:A1992HR36600004 ER PT J AU BELLO, JM NARAYANAN, VA VO-DINH, T AF BELLO, JM NARAYANAN, VA VO-DINH, T TI SURFACE-ENHANCED RAMAN-SCATTERING INTERACTION OF PARA-AMINOBENZOIC ACID ON A SILVER-COATED ALUMINA SUBSTRATE SO SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY LA English DT Article ID ADSORBED MOLECULES; METAL-FILMS; SPECTROMETRY; SPECTROSCOPY; SERS; ELECTRODE AB The adsorption behavior of p-aminobenzoic acid (PABA) molecules on a silver-coated alumina surface-enhanced Raman scattering (SERS) substrate was investigated. For spotted PABA and PABA in non-polar solvents, the PABA molecule is adsorbed flat on the surface of the SERS substrate. In this orientation, the benzene ring is pi-bonded to the substrate, and the molecule is further anchored to the substrate by the binding of the lone pairs of NH2 and COO- groups onto the metal surface. On the other hand, the adsorption behavior of PABA in a polar solvent is greatly influenced by the hydrogen bonding of the amine group with the polar solvent. In this orientation, the molecule is preferentially adsorbed through the COO- and assumes a non-flat orientation on the metal surface. C1 OAK RIDGE NATL LAB, DIV HLTH & SAFETY RES, ADV MONITORING DEV GRP, OAK RIDGE, TN 37381 USA. RP VO-DINH, T (reprint author), OAK RIDGE NATL LAB, DIV HLTH & SAFETY RES, ADV MONITORING DEV GRP, OAK RIDGE, TN 37381 USA. NR 25 TC 15 Z9 15 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1386-1425 J9 SPECTROCHIM ACTA A JI Spectroc. Acta Pt. A-Molec. Biomolec. Spectr. PD APR PY 1992 VL 48 IS 4 BP 563 EP 567 DI 10.1016/0584-8539(92)80047-Z PG 5 WC Spectroscopy SC Spectroscopy GA HN361 UT WOS:A1992HN36100010 ER PT J AU GOUDER, T COLMENARES, CA NAEGELE, JR SPIRLET, JC VERBIST, J AF GOUDER, T COLMENARES, CA NAEGELE, JR SPIRLET, JC VERBIST, J TI A SURFACE SPECTROSCOPY STUDY OF THE OXIDATION PROPERTIES OF UNI2 AND UNI5 SO SURFACE SCIENCE LA English DT Article ID RAY AB Ultraviolet photoelectron, X-ray photoelectron and X-ray induced Auger electron spectroscopies (UPS, XPS and XAES, respectively) were used to study the surface oxidation of UNi2 and UNi5. O2 adsorption results in a preferential oxidation of U to sub- and hyper-stoichiometric UO2 depending on the exposure and temperature. Ni stays metallic but disappears from the surface. The influence of temperature and exposure on the Ni surface concentration was established. UNi5 was shown to be more resistant towards decomposition than UNi2. The binding energy of the Ni 3d electrons changes during surface oxidation, which may be explained by a change in the surface concentration of U metal. C1 COMMISS EUROPEAN COMMUNITIES, JOINT RES CTR, INST TRANSURANIUM ELEMENTS, W-7500 KARLSRUHE, GERMANY. FAC UNIV NOTRE DAME PAIX, SPECT ELECTR LAB, B-5000 NAMUR, BELGIUM. RP GOUDER, T (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. NR 22 TC 4 Z9 4 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD APR 1 PY 1992 VL 265 IS 1-3 BP 175 EP 186 DI 10.1016/0039-6028(92)90498-U PG 12 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA HL015 UT WOS:A1992HL01500020 ER PT J AU TRINGIDES, MC GOMER, R AF TRINGIDES, MC GOMER, R TI ADSORBATE ADSORBATE INTERACTION EFFECTS IN SURFACE-DIFFUSION SO SURFACE SCIENCE LA English DT Article ID COEFFICIENTS; DESORPTION AB The results of MC simulations of the fluctuation, LID and mean-square diffusion distance methods of determining D for circular probed regions are presented for attractive and repulsive nearest-neighbor interactions, respectively, over a wide temperature range. In the absence of interactions all three methods give identical D values. For attractive interactions D from mean-square dispacements is larger than that obtained from the LID method which in turn is bigger than the equilibrium value obtained from the fluctuation method, while the inverse order holds for repulsive interactions. The activation energies obtained from the LID method differ by several J (J being the nn interaction energy) from the equilibrium values, but, possibly fortuitously the prefactors D0 are very similar to the equilibrium values. The reason for the difference in E is that the LID method measures a complicated average over different coverages, while deviations from mean coverage are very small in the fluctuation method. It was also shown that Boltzmann-Matano analysis cannot be carried out for cylindrical geometry, because the relevant solutions do not take the form c(r, t) = f(r/t1/2). C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. UNIV CHICAGO,JAMES FRANCK INST,CHICAGO,IL 60637. UNIV CHICAGO,DEPT CHEM,CHICAGO,IL 60637. RP TRINGIDES, MC (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011, USA. NR 12 TC 57 Z9 57 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD APR 1 PY 1992 VL 265 IS 1-3 BP 283 EP 292 DI 10.1016/0039-6028(92)90508-4 PG 10 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA HL015 UT WOS:A1992HL01500030 ER PT J AU LEDUC, N DOUGLAS, GC MONNIER, M AF LEDUC, N DOUGLAS, GC MONNIER, M TI METHODS FOR NON-STIGMATIC POLLINATION IN TRIFOLIUM-REPENS (PAPILIONACEAE) - SEED SET WITH SELF- AND CROSS-POLLINATIONS INVITRO SO THEORETICAL AND APPLIED GENETICS LA English DT Article DE INVITRO CULTURE; SELF-COMPATIBILITY; POLLINATION; TRIFOLIUM-REPENS ID POLLEN-TUBE GROWTH; PISUM-SATIVUM-L; PLACENTAL POLLINATION; FERTILIZATION; OVULES; HYBRIDIZATION; PLANTS; STYLE AB The stigma and style of Trifolium repens L. was successfully by-passed, and viable seed was obtained by placing pollen on a perforation made in either the ovary wall or in the base of the style. The application of pollen to the stump of the style also succeeded in producing viable seed. The presence of the calyx and corolla facilitated seed set in cultured florets. An incision made along the entire length of the ovary to permit pollen entry resulted in necrosis of the floret. Perforation of the ovary did not affect the yield of seeds obtained from stigmatic pollinations. Growth of pollen tubes was observed on wounded tissues and also within the style and cavity of the ovary. A mean yield of 20 embryos was obtained per 100 florets in non-stigmatic pollinations, whereas with stigmatic pollinations in vitro the yield was 148. Non-stigmatic pollinations also gave seeds when T. repens was self pollinated, which showed that the gametophytic system of self-incompatibility (SI) could be by-passed. With one genotype, self-pollination via the stigma failed, whereas embryos were obtained via non-stigmatic pollinations. C1 TEAGASC,AGR & FOOD DEV AUTHOR,KINSEALY RES CTR,MALAHIDE RD,DUBLIN 17,IRELAND. UNIV PARIS 06,HISTOPHYSIOL VEGETALE LAB,F-75005 PARIS,FRANCE. NR 40 TC 4 Z9 4 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0040-5752 J9 THEOR APPL GENET JI Theor. Appl. Genet. PD APR PY 1992 VL 83 IS 6-7 BP 912 EP 918 PG 7 WC Agronomy; Plant Sciences; Genetics & Heredity; Horticulture SC Agriculture; Plant Sciences; Genetics & Heredity GA HP307 UT WOS:A1992HP30700034 PM 24202771 ER PT J AU SACCOGIBSON, N CHAUDHRY, S BROCK, A SICKLES, AB PATEL, B HEGSTAD, R JOHNSTON, S PETERSON, D BHATTACHARYYA, M AF SACCOGIBSON, N CHAUDHRY, S BROCK, A SICKLES, AB PATEL, B HEGSTAD, R JOHNSTON, S PETERSON, D BHATTACHARYYA, M TI CADMIUM EFFECTS ON BONE METABOLISM - ACCELERATED RESORPTION IN OVARIECTOMIZED, AGED BEAGLES SO TOXICOLOGY AND APPLIED PHARMACOLOGY LA English DT Article ID CIGARETTE-SMOKING; SKELETAL CHANGES; OVARIAN-FUNCTION; RATS; OSTEOPOROSIS; DOGS; INVITRO; MICE; OOPHORECTOMY; INTERLEUKIN-1 C1 ARGONNE NATL LAB,DIV EDUC PROGRAMS,IDAHO FALLS,ID 83401. UNIV MINNESOTA,COLL VET MED,DEPT CLIN & POPULAT SCI,ENDOCRINOL LAB,ST PAUL,MN 55108. RP SACCOGIBSON, N (reprint author), ARGONNE NATL LAB,DIV BIOL & MED RES,IDAHO FALLS,ID 83401, USA. FU NIEHS NIH HHS [ES04816] NR 69 TC 45 Z9 47 U1 2 U2 4 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0041-008X J9 TOXICOL APPL PHARM JI Toxicol. Appl. Pharmacol. PD APR PY 1992 VL 113 IS 2 BP 274 EP 283 DI 10.1016/0041-008X(92)90125-C PG 10 WC Pharmacology & Pharmacy; Toxicology SC Pharmacology & Pharmacy; Toxicology GA HP304 UT WOS:A1992HP30400014 PM 1561636 ER PT J AU VOGEL, JS TURTELTAUB, KW AF VOGEL, JS TURTELTAUB, KW TI BIOMOLECULAR TRACING THROUGH ACCELERATOR MASS-SPECTROMETRY SO TRAC-TRENDS IN ANALYTICAL CHEMISTRY LA English DT Article ID TANDEM ACCELERATOR AB Accelerator mass spectrometry (AMS) has been developed through the past decade into a sensitive tool for the detection of radio-isotopes, primarily for isotope tracing and chronometry in the earth sciences and archaeology. In the past few years, initial experiments have demonstrated the usefulness of this technique for detection of C-14, Al-26, and Ca-41 in biomolecular tracing. We review the advantages of using AMS detection of radio-isotopes in biomedical research. RP VOGEL, JS (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 42 TC 30 Z9 30 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0165-9936 J9 TRAC-TREND ANAL CHEM JI Trac-Trends Anal. Chem. PD APR PY 1992 VL 11 IS 4 BP 142 EP 149 DI 10.1016/0165-9936(92)87076-V PG 8 WC Chemistry, Analytical SC Chemistry GA HT173 UT WOS:A1992HT17300012 ER PT J AU WATSON, JS BELL, JT AF WATSON, JS BELL, JT TI SEPARATION TECHNOLOGY IN ENERGY-PRODUCTION SO TRAC-TRENDS IN ANALYTICAL CHEMISTRY LA English DT Editorial Material RP WATSON, JS (reprint author), MARTIN MARIETTA ENERGY SYST INC,OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0165-9936 J9 TRAC-TREND ANAL CHEM JI Trac-Trends Anal. Chem. PD APR PY 1992 VL 11 IS 4 BP R9 EP R9 DI 10.1016/0165-9936(92)87071-Q PG 1 WC Chemistry, Analytical SC Chemistry GA HT173 UT WOS:A1992HT17300007 ER PT J AU PALLAVICINI, MG FLAKE, AW MADDEN, D BETHEL, C DUNCAN, B GONZALGO, ML HAENDEL, S MONTOYA, T ROBERTS, L AF PALLAVICINI, MG FLAKE, AW MADDEN, D BETHEL, C DUNCAN, B GONZALGO, ML HAENDEL, S MONTOYA, T ROBERTS, L TI HEMATOPOIETIC CHIMERISM IN RODENTS TRANSPLANTED INUTERO WITH FETAL HUMAN HEMATOPOIETIC-CELLS SO TRANSPLANTATION PROCEEDINGS LA English DT Article; Proceedings Paper CT 1ST INTERNATIONAL CONGRESS ON XENOTRANSPLANTATION CY AUG 25-28, 1991 CL MINNEAPOLIS, MN SP UNIV MINNESOTA, DEPT SURG ID HEMATOPOIETIC STEM-CELLS; MOUSE FETUSES; TOLERANCE; DIFFERENTIATION; MICE C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DIV BIOMED SCI,LIVERMORE,CA 94550. RP PALLAVICINI, MG (reprint author), UNIV CALIF SAN FRANCISCO,SCH MED,DEPT LAB MED,MCB 230,SAN FRANCISCO,CA 94143, USA. FU NIAID NIH HHS [AI27909] NR 15 TC 27 Z9 27 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0041-1345 J9 TRANSPLANT P JI Transplant. Proc. PD APR PY 1992 VL 24 IS 2 BP 542 EP 543 PG 2 WC Immunology; Surgery; Transplantation SC Immunology; Surgery; Transplantation GA HN857 UT WOS:A1992HN85700054 PM 1348887 ER PT J AU ERDEMIR, A AJAYI, OO FENSKE, GR ERCK, RA HSIEH, JH AF ERDEMIR, A AJAYI, OO FENSKE, GR ERCK, RA HSIEH, JH TI THE SYNERGISTIC EFFECTS OF SOLID AND LIQUID LUBRICATION ON THE TRIBOLOGICAL BEHAVIOR OF TRANSFORMATION-TOUGHENED ZRO2 CERAMICS SO TRIBOLOGY TRANSACTIONS LA English DT Article ID WEAR; FRICTION; ZIRCONIA AB In this study, the authors investigated the synergistic effects of liquid and solid lubrication on the tribological behavior of yttria-stabilized zirconia (ZrO2) ceramics. Thin silver films 1 to 2-mu-m thick were produced on ZrO2 flats by ion-beam-assisted deposition (IBAD) and used as the solid lubricant. A fully formulated synthetic oil (polyolester-based) served as the liquid lubricant. Wear tests were performed on an oscillating-slider wear test machine at temperatures up to 250-degrees-C. For the specific test conditions explored, it was found that: (a) without any type of lubrication, the friction coefficients of ZrO2/ZrO2 test pairs were on the order of 0.6, and the average wear rates of pins were in the range of 5 x 10(-5) to 10(-4) mm3.N-1.m-1, depending on the test temperature; (b) the use of solid-lubricant silver films alone reduced the friction coefficients of sliding pairs by factors of two to four, and the wear rates of pins by three orders of magnitude; (c) the use of liquid lubricants reduced the friction coefficients of ZrO2/ZrO2 test pairs by a factor of about five and the wear rates of pins by one to two orders of magnitude; and (d) the concurrent use of silver films and lubricant oil resulted in the virtual elimination of the wear of both the pins and the flats, and in a significant reduction of the friction coefficients at room temperature and at 250-degrees-C. RP ERDEMIR, A (reprint author), ARGONNE NATL LAB,DIV MAT & COMPONENTS TECHNOL,ARGONNE,IL 60429, USA. NR 38 TC 12 Z9 16 U1 1 U2 8 PU SOC TRIBOLOGISTS & LUBRICATION ENGINEERS PI PARK RIDGE PA 838 BUSSE HIGHWAY, PARK RIDGE, IL 60068 SN 0569-8197 J9 TRIBOL T JI Tribol. Trans. PD APR PY 1992 VL 35 IS 2 BP 287 EP 297 DI 10.1080/10402009208982120 PG 11 WC Engineering, Mechanical SC Engineering GA HP626 UT WOS:A1992HP62600010 ER PT J AU WILDE, EW SHEALY, RL AF WILDE, EW SHEALY, RL TI CHLORINATION AND DECHLORINATION OF NUCLEAR-REACTOR COOLING WATER SO WATER RESEARCH LA English DT Note DE CHLORINATION; CHLORINE DEMAND; COOLING WATER; COOLING TOWER; DECHLORINATION; SODIUM SULFITE ID FATHEAD MINNOWS; TOXICITY AB Effects from chlorination and dechlorination of Savannah River water were studied during the development of biofouling countermeasures for a proposed cooling tower system required for thermal mitigation of nuclear reactor cooling water effluent. Testing was conducted to assess chlorine demand and dissipation rates as well as the environmental acceptability of using sodium sulfite as a dechlorinating agent. Chlorine demand varied significantly, but in an unpredictable manner during seven seasonal sampling dates. A chlorine dosage of 3-5 mg/l was generally adequate to provide a free chlorine residual of 1 mg/l. Static 48-h bioassays with bluegill showed no acute toxicity for chlorinated/dechlorinated cooling water containing up to 64 times the calculated stoichiometric concentration of sodium sulfite required for dechlorination. Experiments measuring the depletion of dissolved oxygen and flow-through (96-h) bioassays with bluegill and largemouth bass further substantiated the environmental acceptability of using sodium sulfite as a dechlorinating agent. C1 SHEALY ENVIRONM SERV INC,COLUMBIA,SC 29205. RP WILDE, EW (reprint author), WESTINGHOUSE SAVANNAH RIVER CO,SAVANNAH RIVER SITE,AIKEN,SC 29808, USA. NR 12 TC 8 Z9 8 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0043-1354 J9 WATER RES JI Water Res. PD APR PY 1992 VL 26 IS 4 BP 539 EP 545 DI 10.1016/0043-1354(92)90055-9 PG 7 WC Engineering, Environmental; Environmental Sciences; Water Resources SC Engineering; Environmental Sciences & Ecology; Water Resources GA HM291 UT WOS:A1992HM29100017 ER PT J AU SHAN, C FALTA, RW JAVANDEL, I AF SHAN, C FALTA, RW JAVANDEL, I TI ANALYTICAL SOLUTIONS FOR STEADY-STATE GAS-FLOW TO A SOIL VAPOR EXTRACTION WELL SO WATER RESOURCES RESEARCH LA English DT Article ID UNSATURATED ZONE; TRANSPORT; DESIGN; MODEL AB Analytical solutions are developed for modeling steady state gas flow to a single vacuum extraction well in the unsaturated zone. The solutions are applicable to isotropic as well as anisotropic homogeneous subsurface media in which the ground surface is open to the atmosphere. Analytic expressions are given for the gas pressure field, and for the stream function distribution. Streamline travel times are computed using a simple numerical technique employing the analytical solutions. The pressure solution may be used to analyze in situ gas pumping tests to determine average horizontal and vertical gas permeabilities. The stream function solution and streamline travel times may be used to optimize the design of vapor extraction systems for volatile organic chemical removal from the unsaturated zone. Application of the solutions to several examples illustrates the strong effect of screen location and anisotropy on the induced gas flow field, and dimensionless type curves are given for a variety of gas well geometries. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DEPT STRAHLENBIOL,BERKELEY,CA 94720. CLEMSON UNIV,DEPT EARTH SCI,CLEMSON,SC 29634. NR 32 TC 72 Z9 76 U1 0 U2 8 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD APR PY 1992 VL 28 IS 4 BP 1105 EP 1120 DI 10.1029/91WR02986 PG 16 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA HN113 UT WOS:A1992HN11300016 ER PT J AU HILBERATH, T BECKER, S BOLLEN, G KLUGE, HJ KRONERT, U PASSLER, G RIKOVSKA, J WYSS, R AF HILBERATH, T BECKER, S BOLLEN, G KLUGE, HJ KRONERT, U PASSLER, G RIKOVSKA, J WYSS, R TI GROUND-STATE PROPERTIES OF NEUTRON-DEFICIENT PLATINUM ISOTOPES SO ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI LA English DT Article ID NUCLEAR-QUADRUPOLE MOMENTS; CHARGE-RADIUS CHANGES; LIGHT GOLD ISOTOPES; SHAPE COEXISTENCE; HYPERFINE-STRUCTURE; LASER SPECTROSCOPY; EVEN-EVEN; DROPLET-MODEL; SHIFTS; TRANSITION AB The hyperfine structure splitting and the isotope shift in the lambda = 266 nm transition of Pt isotopes within the mass range 183 less-than-or-equal-to A less-than-or-equal-to 198 have been determined by Resonance Ionization Mass Spectroscopy (RIMS) in combination with Pulsed-Laser Induced Desorption (PLID). The Pt isotopes were obtained at the on-line isotope separator ISOLDE-3/CERN as daughters of the primarily produced Hg isotopes. Magnetic moments, quadrupole moments, and changes in the mean-square charge radii are deduced and compared with results of a particle-triaxial rotor model and mean field calculations. Good agreement with experimental data (including nuclear level schemes and transition probabilities) can only be obtained if triaxial shape is admitted. The calculations yield a smooth transition in the shape of odd-A Pt nuclei from a slightly deformed, nearly oblate Pt-195 via triaxial Pt-193-Pt-187 to a strongly deformed nearly prolate 177Pt. C1 OAK RIDGE NATL LAB,JOINT INST HEAVY ION RES,OAK RIDGE,TN 37831. UNIV OXFORD,CLARENDON LAB,OXFORD,ENGLAND. CERN,CH-1211 GENEVA 23,SWITZERLAND. RP HILBERATH, T (reprint author), UNIV MAINZ,INST PHYS,POSTFACH 3980,W-6500 MAINZ,GERMANY. NR 95 TC 81 Z9 81 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0939-7922 J9 Z PHYS A-HADRON NUCL JI Z. Phys. A.-Hadrons Nuclei PD APR PY 1992 VL 342 IS 1 BP 1 EP 15 DI 10.1007/BF01294481 PG 15 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA HN887 UT WOS:A1992HN88700001 ER PT J AU BIRGENEAU, RJ ERWIN, RW GEHRING, PM KASTNER, MA KEIMER, B SATO, M SHAMOTO, S SHIRANE, G TRANQUADA, J AF BIRGENEAU, RJ ERWIN, RW GEHRING, PM KASTNER, MA KEIMER, B SATO, M SHAMOTO, S SHIRANE, G TRANQUADA, J TI TEMPERATURE SCALING OF THE INTEGRATED DYNAMIC SUSCEPTIBILITY IN YBA2CU3O6.5 (T(C) = 50-K) SO ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER LA English DT Article ID MAGNETIC EXCITATIONS; NEUTRON-SCATTERING; NORMAL STATE; SUPERCONDUCTIVITY; OXIDES AB The magnetic neutron scattering cross section in a crystal YBa2Cu3O6.5 (T(c) = 50 K) has been measured for energies between 4.5 meV and 15 meV and temperatures between 10 K and 275 K. From these data we extract the generalized susceptibility integrated around the (pi, pi) position [GRAPHICS] with those at 8.3 and 33.1 meV from a previous study. It is found that I(omega, T) exhibits the simple temperature scaling form found previously in La2-xSrxCuO4. Specifically, in YBa2Cu3O6.5, I(omega, T) = I(omega, 0) 2/pi tan-1 (omega/0.9 T). Implications of this behavior for the d.c. and infrared conductivity are discussed. C1 NATL INST STAND & TECHNOL, GAITHERSBURG, MD 20899 USA. NAGOYA UNIV, NAGOYA 46401, JAPAN. BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA. RP BIRGENEAU, RJ (reprint author), MIT, DEPT PHYS, CAMBRIDGE, MA 02139 USA. RI Tranquada, John/A-9832-2009; OI Tranquada, John/0000-0003-4984-8857; Gehring, Peter/0000-0002-9236-2046 NR 27 TC 45 Z9 45 U1 0 U2 1 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0722-3277 J9 Z PHYS B CON MAT JI Z. Phys. B-Condens. Mat. PD APR PY 1992 VL 87 IS 1 BP 15 EP 19 DI 10.1007/BF01308252 PG 5 WC Physics, Condensed Matter SC Physics GA HM032 UT WOS:A1992HM03200002 ER PT J AU CHAN, Y LIAO, D LEE, SW COOPER, BR MONTANO, PA AF CHAN, Y LIAO, D LEE, SW COOPER, BR MONTANO, PA TI ELECTRON-ENERGY LOSS STUDY OF TIC [111] SO ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER LA English DT Article ID LOSS SPECTROSCOPY; BAND-STRUCTURE; COLLECTIVE EXCITATIONS; FERROMAGNETIC IRON; SINGLE-PARTICLE; LOSS SPECTRA; SURFACES; TIC(111); TITANIUM; AUTOIONIZATION AB The electron energy loss (EEL) spectra of TiC (111) were measured over a wide range of electron primary energies. The electron energy losses below 16 eV were analyzed using the theoretical band calculations of Price and Cooper [11]. The volume and surface plasma excitations were identified from their electron primary energy dependence. Energy losses due to core electrons autoinization effects were identified above 35 eV. We observed a difference in the electronic structure of the surface vs the bulk of TiC. The temperature dependence of the EEL spectra was studied between 300 to 1250 K. The reaction of the TiC surface with ethylene and oxygen was also investigated. The ethylene bonding to the TiC surface was found to be very weak. There is evidence of the formation of surface defects on the TiC (111) surface at high temperatures. C1 HONGIK UNIV, DEPT PHYS, SEOUL, SOUTH KOREA. W VIRGINIA UNIV, DEPT PHYS, MORGANTOWN, WV 26506 USA. ARGONNE NATL LAB, MSD, ARGONNE, IL 60439 USA. RP CHAN, Y (reprint author), CUNY BROOKLYN COLL, DEPT PHYS, BROOKLYN, NY 11210 USA. NR 49 TC 3 Z9 3 U1 2 U2 2 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0722-3277 J9 Z PHYS B CON MAT JI Z. Phys. B-Condens. Mat. PD APR PY 1992 VL 87 IS 1 BP 117 EP 125 DI 10.1007/BF01308266 PG 9 WC Physics, Condensed Matter SC Physics GA HM032 UT WOS:A1992HM03200016 ER PT J AU KARCH, K ANTREASYAN, D BARTELS, HW BESSET, D BIELER, C BIENLEIN, JK BIZZETI, A BLOOM, ED BROCK, I BROCKMULLER, K CABENDA, R CARTACCI, A CAVALLISFORZA, M CLARE, R COMPAGNUCCI, A CONFORTO, G COOPER, S COWAN, R COYNE, D ENGLER, A FAIRFIELD, K FOLGER, G FRIDMAN, A GAISER, J GELPHMAN, D GLASER, G GODFREY, G GRAAF, K HEIMLICH, FH HEINSIUS, FH HOFSTADTER, R IRION, J JAKUBOWSKI, Z JANSSEN, H KEH, S KIEL, T KILIAN, H KIRKBRIDE, I KOIBER, T KOBEL, M KOCH, W KONIG, AC KONIGSMANN, K KRAEMER, RW KRUGER, S LANDI, G LEE, R LEFFLER, S LEKEBUSCH, R LESIAK, T LITKE, AM LOCKMAN, W LOWE, S LURZ, B MARLOW, D MARSISKE, H MASCHMANN, W MCBRIDE, P MESSING, F METZGER, WJ MEYER, H MONTELEONI, B MURYN, B NERNST, R NICZYPORUK, B NOWAK, G PECK, C PELFER, PG POLLOCK, B PORTER, FC PRINDLE, D RATOFF, P REIDENBACH, M RENGER, B RIPPICH, C SCHEER, M SCHMITT, P SCHOTANUS, J SCHUTTE, J SCHWARZ, A SIEVERS, D SKWARNICKI, T STOCK, V STRAUCH, K STROHBUSCH, U TOMPKINS, J TROST, HJ VANUITERT, B VANDEWALLE, RT VOGEL, H VOIGT, A VOLLAND, U WACHS, K WACKER, K WALK, W WEGENER, H WILLIAMS, DA ZSCHORSCH, P AF KARCH, K ANTREASYAN, D BARTELS, HW BESSET, D BIELER, C BIENLEIN, JK BIZZETI, A BLOOM, ED BROCK, I BROCKMULLER, K CABENDA, R CARTACCI, A CAVALLISFORZA, M CLARE, R COMPAGNUCCI, A CONFORTO, G COOPER, S COWAN, R COYNE, D ENGLER, A FAIRFIELD, K FOLGER, G FRIDMAN, A GAISER, J GELPHMAN, D GLASER, G GODFREY, G GRAAF, K HEIMLICH, FH HEINSIUS, FH HOFSTADTER, R IRION, J JAKUBOWSKI, Z JANSSEN, H KEH, S KIEL, T KILIAN, H KIRKBRIDE, I KOIBER, T KOBEL, M KOCH, W KONIG, AC KONIGSMANN, K KRAEMER, RW KRUGER, S LANDI, G LEE, R LEFFLER, S LEKEBUSCH, R LESIAK, T LITKE, AM LOCKMAN, W LOWE, S LURZ, B MARLOW, D MARSISKE, H MASCHMANN, W MCBRIDE, P MESSING, F METZGER, WJ MEYER, H MONTELEONI, B MURYN, B NERNST, R NICZYPORUK, B NOWAK, G PECK, C PELFER, PG POLLOCK, B PORTER, FC PRINDLE, D RATOFF, P REIDENBACH, M RENGER, B RIPPICH, C SCHEER, M SCHMITT, P SCHOTANUS, J SCHUTTE, J SCHWARZ, A SIEVERS, D SKWARNICKI, T STOCK, V STRAUCH, K STROHBUSCH, U TOMPKINS, J TROST, HJ VANUITERT, B VANDEWALLE, RT VOGEL, H VOIGT, A VOLLAND, U WACHS, K WACKER, K WALK, W WEGENER, H WILLIAMS, DA ZSCHORSCH, P TI ANALYSIS OF THE ETA-PI-0-PI-O FINAL-STATE IN PHOTON-PHOTON COLLISIONS SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID 2-PHOTON; CHROMODYNAMICS; ETA' AB The reaction e+ e- --> e+e- eta-pi(0)pi(0) --> e+ e- 6-gamma has been analysed using the full data sample taken with the Crystal Ball detector at the DORIS II storage ring at DESY. The eta-pi(0)pi(0) invariant mass spectrum is dominated by the eta', for which we determine the radiative width GAMMA(gamma-gamma)(eta') to be (4.5 +/- 0.3 +/- 0.5) keV. Near 1.9 GeV/c2 we observe a second enhancement in the eta-pi(0)pi(0) mass distribution. Assuming that these events are created by the production and subsequent decay of a wide resonance X(1900), we have investigated the decay modes, the invariant mass distributions of the eta-pi(0) and pi(0)pi(0) subsystems and the angular distributions of the final state mesons. We find that the data is best described by J(PC) = 2-+. For this J(P) assignment the resonance parameters are GAMMA(gamma-gamma)(X) BR (X --> eta-pi-pi) = (0.95 +/- 0.27 +/- 0.20) keV, GAMMA(tot)(X) = (221 +/- 92 +/- 44) MeV, and M(X) = (1881 +/- 32 +/- 40) MeV/c2. C1 CENS, DPHPE, F-91191 GIF SUR YVETTE, FRANCE. AGH Univ Sci & Technol, INST PHYS & NUCL TECH, PL-30055 KRAKOW, POLAND. UNIV CALIF SANTA CRUZ, SANTA CRUZ, CA 95064 USA. CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA. CRACOW INST NUCL PHYS, PL-30055 KRAKOW, POLAND. DESY, W-2000 HAMBURG, GERMANY. UNIV ERLANGEN NURNBERG, W-8520 ERLANGEN, GERMANY. IST NAZL FIS NUCL, I-50125 FLORENCE, ITALY. UNIV HAMBURG, INST EXPTL PHYS 1, W-2000 HAMBURG 13, GERMANY. HARVARD UNIV, CAMBRIDGE, MA 02138 USA. CATHOLIC UNIV NIJMEGEN, 6525 ED NIJMEGEN, NETHERLANDS. NIKHEF NIJMEGEN, 6525 ED NIJMEGEN, NETHERLANDS. PRINCETON UNIV, PRINCETON, NJ 08544 USA. STANFORD UNIV, DEPT PHYS, HEPL, STANFORD, CA 94309 USA. STANFORD UNIV, STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94309 USA. UNIV WURZBURG, W-8700 WURZBURG, GERMANY. RP CALTECH, PASADENA, CA 91125 USA. RI Marlow, Daniel/C-9132-2014; Cavalli-Sforza, Matteo/H-7102-2015; Vogel, Helmut/N-8882-2014 OI Vogel, Helmut/0000-0002-6109-3023 NR 28 TC 31 Z9 31 U1 1 U2 1 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD APR PY 1992 VL 54 IS 1 BP 33 EP 44 PG 12 WC Physics, Particles & Fields SC Physics GA HP408 UT WOS:A1992HP40800004 ER PT J AU ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOTNER, O BOUQUET, B BOURDARIOS, C BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHAPKIN, M CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P DASILVA, W DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J DOLL, O DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DULINSKI, W EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FASSOULIOTIS, D FEINDT, M FENYUK, A ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F FORBES, KAJ FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIUKHIN, V KOURKOUMELIS, C KRAMER, PH KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J KRUNERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIEB, E LIKO, D LILLETHUN, E LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAGNUSSEN, N MAILLARD, J MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MONIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V OESTERBERG, K OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONJIN, V RONNQVIST, C ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S TCHIKILEV, O THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOMARADZE, A TORASSA, E TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UBERSCHAR, B UBERSCHAR, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDOMINCK, WK VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VILANOVA, D VISHNEVSKY, N VITALE, L VLASOV, E VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J AF ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOTNER, O BOUQUET, B BOURDARIOS, C BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHAPKIN, M CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P DASILVA, W DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J DOLL, O DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DULINSKI, W EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FASSOULIOTIS, D FEINDT, M FENYUK, A ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F FORBES, KAJ FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIUKHIN, V KOURKOUMELIS, C KRAMER, PH KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J KRUNERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIEB, E LIKO, D LILLETHUN, E LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAGNUSSEN, N MAILLARD, J MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MONIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V OESTERBERG, K OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONJIN, V RONNQVIST, C ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S TCHIKILEV, O THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOMARADZE, A TORASSA, E TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UBERSCHAR, B UBERSCHAR, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDOMINCK, WK VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VILANOVA, D VISHNEVSKY, N VITALE, L VLASOV, E VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J TI DETERMINATION OF ALPHA-S IN 2ND-ORDER QCD FROM HADRONIC-Z DECAYS SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID INELASTIC MUON SCATTERING; LUND MONTE-CARLO; JET PRODUCTION-RATES; E+E-ANNIHILATION; QUANTUM CHROMODYNAMICS; PERTURBATION-THEORY; HIGH Q2; SIMULATION; RESONANCE; ENERGIES AB Distributions of event shape variables obtained from 120600 hadronic Z decays measured with the DELPHI detector are compared to the predictions of QCD based event generators. Values of the strong coupling constant alpha(s) are derived as a function of the renormalization scale from a quantitative analysis of eight hadronic distributions. The final result, alpha(s) (M(Z)) = 0.113 +/- 0.007, is based on second order perturbation theory and uses two hadronization corrections, one computed with a parton shower model and the other with a QCD matrix element model. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM. VRIJE UNIV BRUSSELS,IIHE,B-1050 BRUSSELS,BELGIUM. UNIV ETAT MONS,FAC SCI,SERV PHYS PART ELEM,B-7000 MONS,BELGIUM. UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE. UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY. UNIV BOLOGNA,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY. IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY. COLL FRANCE,PHYS CORPUSCULAIRE LAB,F-75231 PARIS 05,FRANCE. CERN,CH-1211 GENEVA 23,SWITZERLAND. CNR,DELPHI GRP,DIV HAUTES ENERGIES,F-67037 STRASBOURG,FRANCE. LEPSI,F-67037 STRASBOURG,FRANCE. NCSR DEMOKRITOS,INST NUCL PHYS,GR-15310 ATHENS,GREECE. UNIV GENOA,DIPARTIMENTO FIS,I-16146 GENOA,ITALY. IST NAZL FIS NUCL,I-16146 GENOA,ITALY. UNIV GRENOBLE 1,INST SCI NUCL,F-38026 GRENOBLE,FRANCE. UNIV HELSINKI,HIGH ENERGY PHYS RES INST,SF-00170 HELSINKI 17,FINLAND. DUBNA JOINT INST NUCL RES,MOSCOW 101000,USSR. UNIV KARLSRUHE,INST EXPTL KERNPHYS,W-7500 KARLSRUHE 1,GERMANY. INST NUCL PHYS,HIGH ENERGY PHYS LAB,PL-30055 KRAKOW 30,POLAND. UNIV PARIS 11,ACCELERATEUR LINEAIRE LAB,F-91405 ORSAY,FRANCE. UNIV LANCASTER,SCH PHYS & MAT,LANCASTER LA1 4YB,ENGLAND. LIP,P-1000 LISBON,PORTUGAL. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,ENGLAND. UNIV PARIS 06,LPNHE,F-75230 PARIS 05,FRANCE. UNIV PARIS 07,LPNHE,F-75230 PARIS 05,FRANCE. UNIV LUND,DEPT PHYS,S-22363 LUND,SWEDEN. UNIV LYON 1,F-69622 VILLEURBANNE,FRANCE. UNIV COMPLUTENSE MADRID,E-28040 MADRID,SPAIN. UNIV AIX MARSEILLE 2,F-13288 MARSEILLE 09,FRANCE. UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY. IST NAZL FIS NUCL,I-20133 MILAN,ITALY. NIELS BOHR INST,DK-2100 COPENHAGEN 0,DENMARK. NIKHEF H,1009 DB AMSTERDAM,NETHERLANDS. NATL TECH UNIV ATHENS,DEPT PHYS,GR-15773 ATHENS,GREECE. UNIV OSLO,DEPT PHYS,N-1000 OSLO 3,NORWAY. UNIV OXFORD,NUCL PHYS LAB,OXFORD OX1 3RH,ENGLAND. UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY. IST NAZL FIS NUCL,I-35131 PADUA,ITALY. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV ROME 2,DIPARTIMENTO FIS,I-00173 ROME,ITALY. IST NAZL FIS NUCL,I-00173 ROME,ITALY. CENS,DDHPE,F-91191 GIF SUR YVETTE,FRANCE. IST NAZL FIS NUCL,IST SUPER SANITA,I-00161 ROME,ITALY. UNIV SANTANDER,FAC CIENCIAS,E-39005 SANTANDER,SPAIN. PROTVINO HIGH ENERGY PHYS INST,PROTVINO,USSR. UNIV STOCKHOLM,INST PHYS,S-11346 STOCKHOLM,SWEDEN. UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10125 TURIN,ITALY. IST NAZL FIS NUCL,I-10125 TURIN,ITALY. UNIV TRIESTE,DIPARTIMENTO FIS,I-34127 TRIESTE,ITALY. IST NAZL FIS NUCL,I-34127 TRIESTE,ITALY. UNIV UDINE,IST FIS,I-33100 UDINE,ITALY. UNIV UPPSALA,DEPT RADIAT SCI,S-75121 UPPSALA,SWEDEN. UNIV VALENCIA,CSIC,CTR MIXTO,INST FIS CORPUSCULAR,VALENCIA,SPAIN. UNIV VALENCIA,DEPT FIS ATOM MOLEC & NUCL,E-46100 BURJASSOT,SPAIN. AUSTRIAN ACAD SCI,INST HOCHENERGIEPHYS,A-1050 VIENNA,AUSTRIA. INST NUCL STUDIES,PL-00681 WARSAW,POLAND. UNIV WARSAW,PL-00681 WARSAW,POLAND. BERG UNIV GESAMTHSCH WUPPERTAL,W-5600 WUPPERTAL 1,GERMANY. RP ABREU, P (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. RI Rovelli, Tiziano/K-4432-2015; Fernandez-Alonso, Mercedes/F-2557-2016; Lozano-Bahilo, Julio/F-4881-2016; Olshevskiy, Alexander/I-1580-2016; Paganoni, Marco/A-4235-2016; Contreras Gonzalez, Jose Luis/K-7255-2014; Hernandez-Rey, Juan Jose/N-5955-2014; Abreu, Pedro/L-2220-2014; Barao, Fernando/O-2357-2016; Zaitsev, Alexandre/B-8989-2017; Vaz, Pedro/K-2464-2013; Monge, Maria Roberta/G-9127-2012; Ridky, Jan/H-6184-2014; Zukanovich Funchal, Renata/C-5829-2013; Pimenta, Mario/M-1741-2013; Gomez Cadenas, Juan Jose/L-2003-2014; Ragazzi, Stefano/D-2463-2009; Roditi, Itzhak/O-7448-2014; Zuniga, Juan/P-4385-2014; Michelotto, Michele/A-9571-2013; Matorras, Francisco/I-4983-2015; Ferrer, Antonio/H-2942-2015; de Groot, Nicolo/A-2675-2009; Katsanevas, Stavros/A-4297-2011; Ruiz, Alberto/E-4473-2011; branchini, paolo/A-4857-2011; Shellard, Ronald/G-4825-2012; Torassa, Ezio/I-1788-2012; Giacomelli, Paolo/B-8076-2009; Fruhwirth, Rudolf/H-2529-2012; Dracos, Marcos/K-2335-2012; Hallgren, Allan/A-8963-2013; Botner, Olga/A-9110-2013; Zalewski, Piotr/H-7335-2013; Marti-Garcia, Salvador/F-3085-2011 OI Rovelli, Tiziano/0000-0002-9746-4842; Fernandez-Alonso, Mercedes/0000-0002-1311-5275; Lozano-Bahilo, Julio/0000-0003-0613-140X; Olshevskiy, Alexander/0000-0002-8902-1793; Paganoni, Marco/0000-0003-2461-275X; Contreras Gonzalez, Jose Luis/0000-0001-7282-2394; Hernandez-Rey, Juan Jose/0000-0002-1527-7200; Abreu, Pedro/0000-0002-9973-7314; Barao, Fernando/0000-0002-8346-9941; Zaitsev, Alexandre/0000-0002-4961-8368; Vaz, Pedro/0000-0002-7186-2359; Monge, Maria Roberta/0000-0003-1633-3195; Ridky, Jan/0000-0001-6697-1393; Zukanovich Funchal, Renata/0000-0001-6749-0022; Pimenta, Mario/0000-0002-2590-0908; Gomez Cadenas, Juan Jose/0000-0002-8224-7714; Ragazzi, Stefano/0000-0001-8219-2074; Roditi, Itzhak/0000-0003-2363-5626; Zuniga, Juan/0000-0002-1041-6451; Michelotto, Michele/0000-0001-6644-987X; Matorras, Francisco/0000-0003-4295-5668; Ferrer, Antonio/0000-0003-0532-711X; Ruiz, Alberto/0000-0002-3639-0368; Shellard, Ronald/0000-0002-2983-1815; Dracos, Marcos/0000-0003-0514-193X; NR 68 TC 45 Z9 45 U1 0 U2 9 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD APR PY 1992 VL 54 IS 1 BP 55 EP 73 PG 19 WC Physics, Particles & Fields SC Physics GA HP408 UT WOS:A1992HP40800006 ER PT J AU DECAMP, D DESCHIZEAUX, B GOY, C LEES, JP MINARD, MN ALEMANY, R CRESPO, JM DELFINO, M FERNANDEZ, E GAITAN, V GARRIDO, L MIR, LM PACHECO, A CATANESI, MG CREANZA, D DEPALMA, M FARILLA, A IASELLI, G MAGGI, G MAGGI, M NATALI, S NUZZO, S QUATTROMINI, M RANIERI, A RASO, G ROMANO, F RUGGIERI, E SELVAGGI, G SILVESTRIS, L TEMPESTA, P ZITO, G GAO, Y HU, H HUANG, D HUANG, X LIN, J LOU, J QIAO, C RUAN, T WANG, T XIE, Y XU, D XU, R ZHANG, J ZHAO, W ATWOOD, WB BAUERDICK, LAT BIRD, F BLUCHER, E BONVICINI, G BOSSI, F BOUDREAU, J BURNETT, TH DREVERMANN, H FORTY, RW GRAB, C HAGELBERG, R HAYWOOD, S HILGART, J JOST, B KASEMANN, M KNOBLOCH, J LACOURT, A LANCON, E LEHRAUS, I LOHSE, T LUSIANI, A MARCHIORO, A MARTINEZ, M MATO, P MENARY, S MEYER, T MINTEN, A MIOTTO, A MIQUEL, R MOSER, HG NASH, J PALAZZI, P RANJARD, F REDLINGER, G ROLANDI, L ROTH, A ROTHBERG, J SAICH, M SCHLATTER, D SCHMELLING, M TEJESSY, W WACHSMUTH, H WASSERBAECH, S WIEDENMANN, W WITZELING, W WOTSCHACK, J AJALTOUNI, Z BADAUD, F BARDADINOTWINOWSKA, M BENCHEIKH, AM ELFELLOUS, R FALVARD, A GAY, P GUICHENEY, C HENRARD, P JOUSSET, J MICHEL, B MONTRET, JC PALLIN, D PERRET, P PIETRZYK, B PRORIOL, J PRULHIERE, F STIMPFL, G HANSEN, JD HANSEN, JR HANSEN, PH MOLLERUD, R NILSSON, BS EFTHYMIOPOULOS, I SIMOPOULOU, E VAYAKI, A BADIER, J BLONDEL, A BONNEAUD, G BRIENT, JC FOUQUE, G GAMESS, A HARVEY, J ORTEU, S ROSOWSKY, A ROUGE, A RUMPF, M TANAKA, R VIDEAU, H CANDLIN, DJ VEITCH, E MONETA, L PARRINI, G CORDEN, M GEORGIOPOULOS, C IKEDA, M LANNUTTI, J LEVINTHAL, D MERMIKIDES, M SAWYER, L ANTONELLI, A BALDINI, R BENCIVENNI, G BOLOGNA, G CAMPANA, P CAPON, G CERUTTI, F CHIARELLA, V DETTORREPIAZZOLI, B FELICI, G LAURELLI, P MANNOCCHI, G MURTAS, F MURTAS, GP PASSALACQUA, L PEPEALTARELLI, M PICCHI, P ZOGRAFOU, P ALTOON, B BOYLE, O COLRAIN, P HALLEY, AW TENHAVE, I LYNCH, JG MAITLAND, W MORTON, WT RAINE, C SCARR, JM SMITH, K THOMPSON, AS TURNBULL, RM BRANDL, B BRAUN, O GEIGES, R GEWENIGER, C HANKE, P HEPP, V KLUGE, EE MAUMARY, Y PUTZER, A RENSCH, B STAHL, A TITTEL, K WUNSCH, M BELK, AT BEUSELINCK, R BINNIE, DM CAMERON, W CATTANEO, M DORNAN, PJ DUGEAY, S GREENE, AM HASSARD, JF LIESKE, NM PATTON, SJ PAYNE, DG PHILLIPS, MJ SEDGBEER, JK TAYLOR, G TOMALIN, IR WRIGHT, AG GIRTLER, P KUHN, D RUDOLPH, G BOWDERY, CK BRODBECK, TJ FINCH, AJ FOSTER, F HUGHES, G JACKSON, D KEEMER, NR NUTTALL, M PATEL, A SLOAN, T SNOW, SW WHELAN, EP BARCZEWSKI, T KLEINKNECHT, K RAAB, J RENK, B ROEHN, S SANDER, HG SCHMIDT, H STEEG, F WALTHER, SM WOLF, B AUBERT, JJ BENCHOUK, C BERNARD, V BONISSENT, A CARR, J COYLE, P DRINKARD, J ETIENNE, F PAPALEXIOU, S PAYRE, P QIAN, Z ROUSSEAU, D SCHWEMLING, P TALBY, M ADLUNG, S BECKER, H BLUM, W BROWN, D CATTANEO, P COWAN, G DEHNING, B DIETL, H DYDAK, F FERNANDEZBOSMAN, M HANSLKOZANECKA, T JAHN, A KOZANECKI, W LANGE, E LAUBER, J LUTJENS, G LUTZ, G MANNER, W PAN, Y RICHTER, R ROTSCHEIDT, H SCHRODER, J SCHWARZ, AS SETTLES, R STIERLIN, U STIEGLER, U STDENIS, R TAKASHIMA, M THOMAS, J WOLF, G BERTIN, V BOUCROT, J CALLOT, O CHEN, X CORDIER, A DAVIER, M GRIVAZ, JF HEUSSE, P JANOT, P KIM, DW LEDIBERDER, F LEFRANCOIS, J LUTZ, AM SCHUNE, MH VEILLET, JJ VIDEAU, I ZHANG, Z ZOMER, F ABBANEO, D AMENDOLIA, SR BAGLIESI, G BATIGNANI, G BOSISIO, L BOTTIGLI, U BRADASCHIA, C CARPINELLI, M CIOCCI, MA DELLORSO, R FERRANTE, I FIDECARO, F FOA, L FOCARDI, E FORTI, F GATTO, C GIASSI, A GIORGI, MA LIGABUE, F MANNELLI, EB MARROCCHESI, PS MESSINEO, A PALLA, F SANGUINETTI, G STEINBERGER, J TENCHINI, R TONELLI, G TRIGGIANI, G VANNINI, C VENTURI, A VERDINI, PG WALSH, J CARTER, JM GREEN, MG MARCH, PV MEDCALF, T QUAZI, IS STRONG, JA WEST, LR WILDISH, T BOTTERILL, DR CLIFFT, RW EDGECOCK, TR EDWARDS, M FISHER, SM JONES, TJ NORTON, PR SALMON, DP THOMPSON, JC BLOCHDEVAUX, B COLAS, P LOCCI, E LOUCATOS, S MONNIER, E PEREZ, P PERLAS, JA PERRIER, F RANDER, J RENARDY, JF ROUSSARIE, A SCHULLER, JP SCHWINDLING, J VALLAGE, B ASHMAN, JG BOOTH, CN BUTTAR, C CARNEY, RE CARTWRIGHT, S COMBLEY, F DOGRU, M HATFIELD, F MARTIN, J PARKER, D REEVES, P THOMPSON, LF BARBERIO, E BRANDT, S GRUPEN, C MEINHARD, H MIRABITO, L SCHAFER, U SEYWERD, H GANIS, G GIANNINI, G GOBBO, B RAGUSA, F BELLANTONI, L CINABRO, D CONWAY, JS COWEN, DE FENG, Z FERGUSON, DPS GAO, YS GRAHL, J HARTON, JL JARED, RC JOHNSON, RP LECLAIRE, BW LISHKA, C PAN, YB PATER, JR SAADI, Y SHARMA, V SHI, ZH TANG, YH WALSH, AM WEAR, JA WEBER, FV WHITNEY, MH WU, SL ZOBERNIG, G AF DECAMP, D DESCHIZEAUX, B GOY, C LEES, JP MINARD, MN ALEMANY, R CRESPO, JM DELFINO, M FERNANDEZ, E GAITAN, V GARRIDO, L MIR, LM PACHECO, A CATANESI, MG CREANZA, D DEPALMA, M FARILLA, A IASELLI, G MAGGI, G MAGGI, M NATALI, S NUZZO, S QUATTROMINI, M RANIERI, A RASO, G ROMANO, F RUGGIERI, E SELVAGGI, G SILVESTRIS, L TEMPESTA, P ZITO, G GAO, Y HU, H HUANG, D HUANG, X LIN, J LOU, J QIAO, C RUAN, T WANG, T XIE, Y XU, D XU, R ZHANG, J ZHAO, W ATWOOD, WB BAUERDICK, LAT BIRD, F BLUCHER, E BONVICINI, G BOSSI, F BOUDREAU, J BURNETT, TH DREVERMANN, H FORTY, RW GRAB, C HAGELBERG, R HAYWOOD, S HILGART, J JOST, B KASEMANN, M KNOBLOCH, J LACOURT, A LANCON, E LEHRAUS, I LOHSE, T LUSIANI, A MARCHIORO, A MARTINEZ, M MATO, P MENARY, S MEYER, T MINTEN, A MIOTTO, A MIQUEL, R MOSER, HG NASH, J PALAZZI, P RANJARD, F REDLINGER, G ROLANDI, L ROTH, A ROTHBERG, J SAICH, M SCHLATTER, D SCHMELLING, M TEJESSY, W WACHSMUTH, H WASSERBAECH, S WIEDENMANN, W WITZELING, W WOTSCHACK, J AJALTOUNI, Z BADAUD, F BARDADINOTWINOWSKA, M BENCHEIKH, AM ELFELLOUS, R FALVARD, A GAY, P GUICHENEY, C HENRARD, P JOUSSET, J MICHEL, B MONTRET, JC PALLIN, D PERRET, P PIETRZYK, B PRORIOL, J PRULHIERE, F STIMPFL, G HANSEN, JD HANSEN, JR HANSEN, PH MOLLERUD, R NILSSON, BS EFTHYMIOPOULOS, I SIMOPOULOU, E VAYAKI, A BADIER, J BLONDEL, A BONNEAUD, G BRIENT, JC FOUQUE, G GAMESS, A HARVEY, J ORTEU, S ROSOWSKY, A ROUGE, A RUMPF, M TANAKA, R VIDEAU, H CANDLIN, DJ VEITCH, E MONETA, L PARRINI, G CORDEN, M GEORGIOPOULOS, C IKEDA, M LANNUTTI, J LEVINTHAL, D MERMIKIDES, M SAWYER, L ANTONELLI, A BALDINI, R BENCIVENNI, G BOLOGNA, G CAMPANA, P CAPON, G CERUTTI, F CHIARELLA, V DETTORREPIAZZOLI, B FELICI, G LAURELLI, P MANNOCCHI, G MURTAS, F MURTAS, GP PASSALACQUA, L PEPEALTARELLI, M PICCHI, P ZOGRAFOU, P ALTOON, B BOYLE, O COLRAIN, P HALLEY, AW TENHAVE, I LYNCH, JG MAITLAND, W MORTON, WT RAINE, C SCARR, JM SMITH, K THOMPSON, AS TURNBULL, RM BRANDL, B BRAUN, O GEIGES, R GEWENIGER, C HANKE, P HEPP, V KLUGE, EE MAUMARY, Y PUTZER, A RENSCH, B STAHL, A TITTEL, K WUNSCH, M BELK, AT BEUSELINCK, R BINNIE, DM CAMERON, W CATTANEO, M DORNAN, PJ DUGEAY, S GREENE, AM HASSARD, JF LIESKE, NM PATTON, SJ PAYNE, DG PHILLIPS, MJ SEDGBEER, JK TAYLOR, G TOMALIN, IR WRIGHT, AG GIRTLER, P KUHN, D RUDOLPH, G BOWDERY, CK BRODBECK, TJ FINCH, AJ FOSTER, F HUGHES, G JACKSON, D KEEMER, NR NUTTALL, M PATEL, A SLOAN, T SNOW, SW WHELAN, EP BARCZEWSKI, T KLEINKNECHT, K RAAB, J RENK, B ROEHN, S SANDER, HG SCHMIDT, H STEEG, F WALTHER, SM WOLF, B AUBERT, JJ BENCHOUK, C BERNARD, V BONISSENT, A CARR, J COYLE, P DRINKARD, J ETIENNE, F PAPALEXIOU, S PAYRE, P QIAN, Z ROUSSEAU, D SCHWEMLING, P TALBY, M ADLUNG, S BECKER, H BLUM, W BROWN, D CATTANEO, P COWAN, G DEHNING, B DIETL, H DYDAK, F FERNANDEZBOSMAN, M HANSLKOZANECKA, T JAHN, A KOZANECKI, W LANGE, E LAUBER, J LUTJENS, G LUTZ, G MANNER, W PAN, Y RICHTER, R ROTSCHEIDT, H SCHRODER, J SCHWARZ, AS SETTLES, R STIERLIN, U STIEGLER, U STDENIS, R TAKASHIMA, M THOMAS, J WOLF, G BERTIN, V BOUCROT, J CALLOT, O CHEN, X CORDIER, A DAVIER, M GRIVAZ, JF HEUSSE, P JANOT, P KIM, DW LEDIBERDER, F LEFRANCOIS, J LUTZ, AM SCHUNE, MH VEILLET, JJ VIDEAU, I ZHANG, Z ZOMER, F ABBANEO, D AMENDOLIA, SR BAGLIESI, G BATIGNANI, G BOSISIO, L BOTTIGLI, U BRADASCHIA, C CARPINELLI, M CIOCCI, MA DELLORSO, R FERRANTE, I FIDECARO, F FOA, L FOCARDI, E FORTI, F GATTO, C GIASSI, A GIORGI, MA LIGABUE, F MANNELLI, EB MARROCCHESI, PS MESSINEO, A PALLA, F SANGUINETTI, G STEINBERGER, J TENCHINI, R TONELLI, G TRIGGIANI, G VANNINI, C VENTURI, A VERDINI, PG WALSH, J CARTER, JM GREEN, MG MARCH, PV MEDCALF, T QUAZI, IS STRONG, JA WEST, LR WILDISH, T BOTTERILL, DR CLIFFT, RW EDGECOCK, TR EDWARDS, M FISHER, SM JONES, TJ NORTON, PR SALMON, DP THOMPSON, JC BLOCHDEVAUX, B COLAS, P LOCCI, E LOUCATOS, S MONNIER, E PEREZ, P PERLAS, JA PERRIER, F RANDER, J RENARDY, JF ROUSSARIE, A SCHULLER, JP SCHWINDLING, J VALLAGE, B ASHMAN, JG BOOTH, CN BUTTAR, C CARNEY, RE CARTWRIGHT, S COMBLEY, F DOGRU, M HATFIELD, F MARTIN, J PARKER, D REEVES, P THOMPSON, LF BARBERIO, E BRANDT, S GRUPEN, C MEINHARD, H MIRABITO, L SCHAFER, U SEYWERD, H GANIS, G GIANNINI, G GOBBO, B RAGUSA, F BELLANTONI, L CINABRO, D CONWAY, JS COWEN, DE FENG, Z FERGUSON, DPS GAO, YS GRAHL, J HARTON, JL JARED, RC JOHNSON, RP LECLAIRE, BW LISHKA, C PAN, YB PATER, JR SAADI, Y SHARMA, V SHI, ZH TANG, YH WALSH, AM WEAR, JA WEBER, FV WHITNEY, MH WU, SL ZOBERNIG, G TI A STUDY OF BOSE-EINSTEIN CORRELATIONS IN E+E- ANNIHILATION AT 91 GEV SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID MULTIPLE PRODUCTION; MONTE-CARLO; PARTICLES; COHERENCE; LEP AB This paper describes a study of Bose-Einstein correlations made using the ALEPH detector at LEP. The correlations are found to enhance the two particle differential cross section for pairs of identical pions by a factor which can be roughly parametrized by R(Q) = 1 + lambda exp(-Q2-sigma(2)), where Q is the difference in the 3-momenta of the two pions in their centre of mass frame, lambda = 0.51 +/- 0.04 +/- 0.11 and sigma = 3.3 +/- 0.2 +/- 0.8 GeV-1, which corresponds to a source size of 0.65 +/- 0.04 +/- 0.16 fm. The large systematic errors on these results reflect their strong dependence on the choice of the reference sample used in the analysis. This problem is believed to occur primarily because of uncertainties in the rates of resonance production and a lack of knowledge about the pion-pion strong interaction. No significant correlations are seen amongst like-charged pion-kaon pairs. C1 UNIV AUTONOMA BARCELONA,FIS ATLAS ENERGIAS LAB,E-08193 BARCELONA,SPAIN. UNIV BARI,DIPARTIMENTO FIS,I-70126 BARI,ITALY. IST NAZL FIS NUCL,BARI,ITALY. CHINESE ACAD SCI,INST HIGH ENERGY PHYS,BEIJING,PEOPLES R CHINA. CERN,EUROPEAN LAB PARTICLE PHYS,CH-1211 GENEVA 23,SWITZERLAND. UNIV CLERMONT FERRAND,PHYS CORPUSCULAIRE LAB,CNRS,IN3P3,F-63177 CLERMONT FERRAND,FRANCE. NIELS BOHR INST,DK-2100 COPENHAGEN,DENMARK. DEMOCRITOS NUCL RES CTR,ATHENS,GREECE. ECOLE POLYTECH,PHYS NUCL & HAUTES ENERGIES LAB,CNRS,IN2P3,F-91128 PALAISEAU,FRANCE. UNIV EDINBURGH,DEPT PHYS,EDINBURGH EH9 3JZ,MIDLOTHIAN,SCOTLAND. UNIV FLORENCE,IST NAZL FIZ NUCL,DIPARTIMENTO FIS,I-50125 FLORENCE,ITALY. FLORIDA STATE UNIV,SUPERCOMP COMPUTAT RES INST,TALLAHASSEE,FL 32306. FLORIDA STATE UNIV,DEPT PHYS,TALLAHASSEE,FL 32306. IST NAZL FIS NUCL,LAB NAZ,I-00044 FRASCATI,ITALY. UNIV GLASGOW,DEPT PHYS & ASTRON,GLASGOW G12 8QQ,SCOTLAND. UNIV HEIDELBERG,INST HOCHENERGIEPHYS,W-6900 HEIDELBERG,GERMANY. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,DEPT PHYS,LONDON SW7 2BZ,ENGLAND. UNIV LANCASTER,DEPT PHYS,LANCASTER LA1 4YB,ENGLAND. UNIV MAINZ,INST PHYS,W-6500 MAINZ,GERMANY. FAC SCI LUMINY,CTR PHYS PARTICULES,CNRS,IN2P3,F-13288 MARSEILLE,FRANCE. MAX PLANCK INST PHYS & ASTROPHYS,WERNER HEISENBERG INST PHYS,W-8000 MUNICH 40,GERMANY. UNIV PARIS 11,ACCELERATEUR LINEAIRE LAB,CNRS,IN2P3,F-91405 ORSAY,FRANCE. UNIV PISA,IST NAZL FIZ NUCL,DIPARTIMENTO FIS,I-56010 PISA,ITALY. SCUOLA NORMAL SUPER,I-56010 PISA,ITALY. UNIV LONDON,ROYAL HOLLOWAY & BEDFORD NEW COLL,DEPT PHYS,SURREY TW20 0EX,ENGLAND. RUTHERFORD APPLETON LAB,DEPT PARTICLE PHYS,DIDCOT OX11 0QX,OXON,ENGLAND. CENS,DEPT PHYS PARTICULES ELEMENTAIRES,F-91191 GIF SUR YVETTE,FRANCE. UNIV SHEFFIELD,DEPT PHYS,SHEFFIELD S3 7RH,S YORKSHIRE,ENGLAND. UNIV SIEGEN,FACHBEREICH PHYS,W-5900 SIEGEN,GERMANY. UNIV TRIESTE,DIPARTIMENTO FIS,I-34127 TRIESTE,ITALY. IST NAZL FIS NUCL,I-34127 TRIESTE,ITALY. UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706. STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. UNIV WASHINGTON,SEATTLE,WA 98195. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV TURIN,IST FIS GEN,I-10124 TURIN,ITALY. CNR,IST COSMOGEOFIS,TURIN,ITALY. NAPLES UNIV,DIPARTIMENTO SCI PHYS,I-80138 NAPLES,ITALY. RP DECAMP, D (reprint author), CNRS,PHYS PARTICULES LAB,IN2P3,F-74019 ANNECY LE VIEUX,FRANCE. RI Delfino, Manuel/A-1545-2012; ANTONELLI, ANTONELLA/C-6238-2011; Buttar, Craig/D-3706-2011; Stahl, Achim/E-8846-2011; Passalacqua, Luca/F-5127-2011; St.Denis, Richard/C-8997-2012; Forti, Francesco/H-3035-2011; Focardi, Ettore/E-7376-2012; Venturi, Andrea/J-1877-2012; Perrier, Frederic/A-5953-2011; Rolandi, Luigi (Gigi)/E-8563-2013; Colas, Paul/F-2876-2013; Bosman, Martine/J-9917-2014; Fernandez, Enrique/L-5387-2014; Mir, Lluisa-Maria/G-7212-2015; ciocci, maria agnese /I-2153-2015; Hansen, John/B-9058-2015; Lusiani, Alberto/N-2976-2015; Marrocchesi, Pier Simone/N-9068-2015; Lusiani, Alberto/A-3329-2016; Murtas, Fabrizio/B-5729-2012; Booth, Christopher/B-5263-2016; Pacheco Pages, Andres/C-5353-2011; Ferrante, Isidoro/F-1017-2012; Ligabue, Franco/F-3432-2014; OI Delfino, Manuel/0000-0002-9468-4751; Stahl, Achim/0000-0002-8369-7506; Forti, Francesco/0000-0001-6535-7965; Focardi, Ettore/0000-0002-3763-5267; Rolandi, Luigi (Gigi)/0000-0002-0635-274X; Bosman, Martine/0000-0002-7290-643X; Fernandez, Enrique/0000-0002-6405-9488; Mir, Lluisa-Maria/0000-0002-4276-715X; ciocci, maria agnese /0000-0003-0002-5462; Hansen, John/0000-0002-8422-5543; Lusiani, Alberto/0000-0002-6876-3288; Marrocchesi, Pier Simone/0000-0003-1966-140X; Lusiani, Alberto/0000-0002-6876-3288; Booth, Christopher/0000-0002-6051-2847; Pacheco Pages, Andres/0000-0001-8210-1734; Ferrante, Isidoro/0000-0002-0083-7228; Palazzi, Paolo/0000-0002-4861-391X; RASO, Giuseppe/0000-0002-5660-3711; Bottigli, Ubaldo/0000-0002-0666-3433; Ligabue, Franco/0000-0002-1549-7107; Bloch-Devaux, Brigitte/0000-0002-2463-1232; Murtas, Fabrizio/0000-0002-7041-6541; Garrido Beltran, Lluis/0000-0001-8883-6539 NR 28 TC 88 Z9 88 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD APR PY 1992 VL 54 IS 1 BP 75 EP 85 PG 11 WC Physics, Particles & Fields SC Physics GA HP408 UT WOS:A1992HP40800007 ER PT J AU CLOSE, FE LI, ZP AF CLOSE, FE LI, ZP TI A UNIFIED FORMALISM FOR GAMMA-GAMMA-] MESON AND PSI-]GAMMA-X WITH POSSIBLE TESTS FOR HYBRID AND GLUONIC HADRONS SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID QUARK-MODEL; MIT BAG; RESONANCES; STATES; QCD; ELECTROPRODUCTION; PHOTOPRODUCTION; COLLISIONS; STAR AB The couplings of conventional and hybrid mesons to gamma-gamma (real and virtual) and their production amplitudes in psi --> gamma-M are described in a unified manner. Existing results for heavy quarks are recovered, extensions to light quarks and to virtual gamma-couplings are made and phenomenological applications discussed. In particular we discuss relativistic corrections to gamma-gamma --> 0+, 1+, 2+ for both real and virtual photons and offer a resolution to a long standing puzzle in perturbative QCD concerning the helicity structure of psi --> gamma-2++. We suggest that the production of f2(1720) involves gluons in an essential way or that this meson has J not-equal 2. C1 OAK RIDGE NATL LAB,DEPT PHYS,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,CTR COMPUTAT INTENS PROBLEMS,OAK RIDGE,TN 37831. RUTHERFORD APPLETON LAB,DIV THEORY,DIDCOT OX11 0QX,OXON,ENGLAND. RP CLOSE, FE (reprint author), UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996, USA. NR 45 TC 17 Z9 17 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD APR PY 1992 VL 54 IS 1 BP 147 EP 162 DI 10.1007/BF01881718 PG 16 WC Physics, Particles & Fields SC Physics GA HP408 UT WOS:A1992HP40800016 ER PT J AU SHORE, BW BERGMANN, K OREG, J AF SHORE, BW BERGMANN, K OREG, J TI COHERENT POPULATION TRANSFER - STIMULATED RAMAN ADIABATIC PASSAGE AND THE LANDAU-ZENER PICTURE SO ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS LA English DT Article ID 3-LEVEL SYSTEM DRIVEN; DELAYED LASER-PULSES; MULTILEVEL SYSTEMS; VIBRATIONAL LEVELS; RABI OSCILLATIONS; 3-STATE SYSTEMS; SCATTERING; MODEL; BEAMS AB We show that three-state coherent excitation by pulsed lasers, sometimes termed Stimulated Raman Adiabatic Passage (STIRAP), can be regarded as a limiting case of four-state excitation involving pairs of two-state transitions (pump and Stokes) that couple coherently. A complementary limiting case of our four-state model is recognizable as a pair of Landau-Zener curve crossings. In each of these regimes it is possible to have complete population transfer by adiabatic passage. With the aid of analytical expressions and numerical computations we show the differences between these two mechanisms. C1 UNIV KAISERSLAUTERN,FACHBEREICH PHYS,W-6750 KAISERSLAUTERN,GERMANY. NUCL RES CTR NEGEV,IL-84190 BEER SHEVA,ISRAEL. RP SHORE, BW (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,1 CYCLOTRON RD,LIVERMORE,CA 94550, USA. RI BERGMANN, KLAAS/D-5543-2011 NR 27 TC 38 Z9 39 U1 0 U2 11 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0178-7683 J9 Z PHYS D ATOM MOL CL JI Z. Phys. D-Atoms Mol. Clusters PD APR PY 1992 VL 23 IS 1 BP 33 EP 39 PG 7 WC Physics, Atomic, Molecular & Chemical SC Physics GA HQ504 UT WOS:A1992HQ50400007 ER PT J AU PARISE, JB CORBIN, DR GIER, TE HARLOW, RL ABRAMS, L VONDREELE, RB AF PARISE, JB CORBIN, DR GIER, TE HARLOW, RL ABRAMS, L VONDREELE, RB TI FLEXIBILITY OF THE RHO FRAMEWORK - A COMPARISON OF THE RB-EXCHANGED ZEOLITE AND THE NOVEL COMPOSITION RB24BE24AS24O96.3.2 D2O SO ZEOLITES LA English DT Article DE RHO; BERYLLIUM ARSENATE; CRYSTAL STRUCTURE; SYNTHESIS; FLEXIBILITY ID POWDER DIFFRACTION AB The structure of D2O-exchanged partially dehydrated Rb24Be24As24O96.3.2 D2O was refined using a combination of neutron and X-ray powder diffraction data coupled with interatomic distance constraints. This material crystallizes with the framework of zeolite RHO [I23, a = 14.001(1)angstrom]. The 24 Rb+ are distributed as follows: The six double 8-ring sites (D8R) are fully occupied, two single 6-ring sites (S6R) are occupied by an average of 15 Rb+, and the remaining Rb+ are randomly distributed over the 12 single 8-ring sites (S8R). The structure of the analogous D2O-exchanged, dehydrated aluminosilicate RHO, Rb10Al10Si38O96 [I43mBAR, a = 14.374(1)angstrom] was refined using neutron powder diffraction data. The Rb+ ions are located, in order of preference, at the D8R and at only one of the S6R-sites at (x,x,x); x = 0.191 (1). The relative framework distortion parameters for the elliptical 8-rings, DELTA/a, are 0.14 and 0.22 for the aluminosilicate and berylloarsenate, respectively. This variation of distortion with the unit cell parameter follows the same trend as that established for a number of materials with the RHO framework. C1 DUPONT CO,EXPTL STN,WILMINGTON,DE 19898. UNIV CALIF LOS ALAMOS SCI LAB,LANSCE,LOS ALAMOS,NM 87544. RP PARISE, JB (reprint author), SUNY STONY BROOK,DEPT EARTH & SPACE SCI,STONY BROOK,NY 11794, USA. NR 15 TC 20 Z9 20 U1 1 U2 3 PU BUTTERWORTH-HEINEMANN PI WOBURN PA 225 WILDWOOD AVE #UNITB PO BOX 4500, WOBURN, MA 01801-2084 SN 0144-2449 J9 ZEOLITES JI Zeolites PD APR-MAY PY 1992 VL 12 IS 4 BP 360 EP 368 PG 9 WC Chemistry, Physical SC Chemistry GA HU808 UT WOS:A1992HU80800005 ER PT J AU BUDINGER, TF AF BUDINGER, TF TI EMERGING NUCLEAR-MAGNETIC-RESONANCE TECHNOLOGIES - HEALTH AND SAFETY SO ANNALS OF THE NEW YORK ACADEMY OF SCIENCES LA English DT Article ID REDUCTION PLANT WORKERS; MORTALITY; FIELDS RP BUDINGER, TF (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 25 TC 18 Z9 18 U1 0 U2 0 PU NEW YORK ACAD SCIENCES PI NEW YORK PA 2 E 63RD ST, NEW YORK, NY 10021 SN 0077-8923 J9 ANN NY ACAD SCI JI Ann. N.Y. Acad. Sci. PD MAR 31 PY 1992 VL 649 BP 1 EP 18 DI 10.1111/j.1749-6632.1992.tb49592.x PG 18 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA JM217 UT WOS:A1992JM21700001 PM 1580484 ER PT J AU LIBURDY, RP AF LIBURDY, RP TI BIOLOGICAL INTERACTIONS OF CELLULAR-SYSTEMS WITH TIME-VARYING MAGNETIC-FIELDS SO ANNALS OF THE NEW YORK ACADEMY OF SCIENCES LA English DT Article ID ELECTROMAGNETIC-FIELDS; CELLS; EXPOSURE; CALCIUM; STIMULATION; ACTIVATION; THYMOCYTES; HZ RP LIBURDY, RP (reprint author), LAWRENCE BERKELEY LAB,DIV RES MED & RADIAT BIOPHYS,BIOELECTROMAGNET RES GRP,BERKELEY,CA 94720, USA. FU NCI NIH HHS [CA53711] NR 19 TC 42 Z9 42 U1 0 U2 0 PU NEW YORK ACAD SCIENCES PI NEW YORK PA 2 E 63RD ST, NEW YORK, NY 10021 SN 0077-8923 J9 ANN NY ACAD SCI JI Ann. N.Y. Acad. Sci. PD MAR 31 PY 1992 VL 649 BP 74 EP 95 DI 10.1111/j.1749-6632.1992.tb49599.x PG 22 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA JM217 UT WOS:A1992JM21700007 PM 1580520 ER PT J AU LIBURDY, RP DEMANINCOR, DJ ROOS, MS BRENNAN, KM AF LIBURDY, RP DEMANINCOR, DJ ROOS, MS BRENNAN, KM TI PERMEABILITY OF THE BLOOD-BRAIN-BARRIER OF THE RAT IS NOT SIGNIFICANTLY ALTERED BY NMR EXPOSURE SO ANNALS OF THE NEW YORK ACADEMY OF SCIENCES LA English DT Article C1 LAWRENCE BERKELEY LAB,NMR RES GRP,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV RES MED & RADIAT BIOPHYS,BERKELEY,CA 94720. RP LIBURDY, RP (reprint author), LAWRENCE BERKELEY LAB,BIOELECTROMAGNET RES GRP,BERKELEY,CA 94720, USA. NR 8 TC 6 Z9 7 U1 0 U2 0 PU NEW YORK ACAD SCIENCES PI NEW YORK PA 2 E 63RD ST, NEW YORK, NY 10021 SN 0077-8923 J9 ANN NY ACAD SCI JI Ann. N.Y. Acad. Sci. PD MAR 31 PY 1992 VL 649 BP 345 EP 349 DI 10.1111/j.1749-6632.1992.tb49626.x PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA JM217 UT WOS:A1992JM21700029 PM 1580507 ER PT J AU ROBINSON, MT MCCALL, MR RUBIN, E LAUER, S LABELLE, M FORTE, TM AF ROBINSON, MT MCCALL, MR RUBIN, E LAUER, S LABELLE, M FORTE, TM TI APOLIPOPROTEIN-B GENETIC POLYMORPHISMS IN SEVERAL HUMAN HEPATOMA DERIVED LIVER-CELL LINES SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS LA English DT Article ID LOW-DENSITY LIPOPROTEIN; CORONARY HEART-DISEASE; DNA POLYMORPHISMS; HYPERVARIABLE REGION; HEP-G2; HEPG2; POLYMERASE; SECRETION; SEQUENCE; LIPASE C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,1 CYCLOTRON RD,BERKELEY,CA 94720. GLADSTONE FDN LABS CARDIOVASC DIS,SAN FRANCISCO,CA 94140. FU NCRR NIH HHS [RR 05918]; NHLBI NIH HHS [HL 18574, HL 07279] NR 26 TC 0 Z9 0 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0006-291X J9 BIOCHEM BIOPH RES CO JI Biochem. Biophys. Res. Commun. PD MAR 31 PY 1992 VL 183 IS 3 BP 1224 EP 1229 DI 10.1016/S0006-291X(05)80321-3 PG 6 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA HM246 UT WOS:A1992HM24600044 PM 1348933 ER PT J AU BAKER, JP STEPHENS, DR BLANCH, HW PRAUSNITZ, JM AF BAKER, JP STEPHENS, DR BLANCH, HW PRAUSNITZ, JM TI SWELLING EQUILIBRIA FOR ACRYLAMIDE-BASED POLYAMPHOLYTE HYDROGELS SO MACROMOLECULES LA English DT Article ID GELS AB Polyampholyte hydrogels were synthesized by copolymerizing acrylamide with the cationic monomer methacrylamidopropyl trimethylammonium chloride and the anionic monomer sodium styrene sulfonate. The total nominal charge density of the hydrogels was held constant at 4.7 +/- 0.1 mol % (dry basis), while the molar ratio of anionic to cationic moieties within the hydrogels was varied. Swelling equilibria were measured in water and in aqueous sodium chloride solutions ranging in ionic strength from 10(-5) to 1.0 M. The hydrogels showed increasing insensitivity to ionic strength as the molar ratio of anionic to cationic moieties in the hydrogel approached unity. Donnan membrane equilibria qualitatively explain the experimental results. C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. NR 17 TC 100 Z9 104 U1 2 U2 16 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD MAR 30 PY 1992 VL 25 IS 7 BP 1955 EP 1958 DI 10.1021/ma00033a019 PG 4 WC Polymer Science SC Polymer Science GA HL912 UT WOS:A1992HL91200019 ER PT J AU ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B ASTIER, P AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M BONESINI, M BONIVENTO, W BOOTH, PSL BORATAV, M BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOTNER, O BOUQUET, B BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHARPENTIER, P CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DERKAOUI, J DICIACCIO, L DIJKSTRA, H DJAMA, F DOLBEAU, J DOLL, O DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DULINSKI, W EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FASSOULIOTIS, D FEINDT, M FENYUK, A ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F FORBES, KAJ FORSBACH, H FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GLITZA, KW GOKIELI, R GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROS, MH GROSDIDIER, G GROSS, E GROSSETETE, B GROSSEWIESMANN, P GUMENYUK, S GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW HENKES, T HERBST, I HERNANDEZ, JJ HERQUET, P HERR, H HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONOREPF HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KOSTRIKOV, M KOURKOUMELIS, C KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIKO, D LIEB, E LILLETHUN, E LINDGREN, J LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B LOKAJICEK, M LOKEN, JG AGUERA, MAL LOPEZFERNANDEZ, A LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUCOCK, R LUTZ, P LYONS, L MAEHLUM, G MAGNUSSEN, N MAILLARD, J MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G MATVEEV, M MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MENICHETTI, E MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MYATT, G NARAGHI, F NAUKORZEN, U NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A PYYHTIA, J RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMITH, GR SMIRNOV, N SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S THEODOSIOU, G TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O UVAROV, VA VALENTI, G VALLAZZA, E FERRER, JAV VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VANDERVELDE, C VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VIBERT, L VILANOVA, D VITALE, L VLASOV, EV VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J AF ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B ASTIER, P AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M BONESINI, M BONIVENTO, W BOOTH, PSL BORATAV, M BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOTNER, O BOUQUET, B BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHARPENTIER, P CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DERKAOUI, J DICIACCIO, L DIJKSTRA, H DJAMA, F DOLBEAU, J DOLL, O DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DULINSKI, W EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FASSOULIOTIS, D FEINDT, M FENYUK, A ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F FORBES, KAJ FORSBACH, H FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GLITZA, KW GOKIELI, R GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROS, MH GROSDIDIER, G GROSS, E GROSSETETE, B GROSSEWIESMANN, P GUMENYUK, S GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW HENKES, T HERBST, I HERNANDEZ, JJ HERQUET, P HERR, H HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONOREPF HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KOSTRIKOV, M KOURKOUMELIS, C KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIKO, D LIEB, E LILLETHUN, E LINDGREN, J LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B LOKAJICEK, M LOKEN, JG AGUERA, MAL LOPEZFERNANDEZ, A LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUCOCK, R LUTZ, P LYONS, L MAEHLUM, G MAGNUSSEN, N MAILLARD, J MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G MATVEEV, M MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MENICHETTI, E MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MYATT, G NARAGHI, F NAUKORZEN, U NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A PYYHTIA, J RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMITH, GR SMIRNOV, N SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S THEODOSIOU, G TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O UVAROV, VA VALENTI, G VALLAZZA, E FERRER, JAV VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VANDERVELDE, C VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VIBERT, L VILANOVA, D VITALE, L VLASOV, EV VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J TI A SEARCH FOR NEUTRAL HIGGS PARTICLES IN Z(0) DECAYS SO NUCLEAR PHYSICS B LA English DT Article ID MASS SCALAR BOSON; Z0 DECAY; SUPERSYMMETRIC MODELS; STANDARD MODEL; E+E COLLISIONS; NUCLEAR DECAY; LIGHT SCALAR; LIMITS; LEP; PHYSICS AB The search in DELPHI data for neutral Higgs bosons is described. No candidate for the Standard Model Higgs is seen in Z0 decays to H-0-nu-nuBAR, H-0-mu+-mu- or H-0-tau+-tau- after selections that proved efficient for finding simulated H-0. One remaining candidate for Z0 --> H-0e+ e- is consistent with background. Together with our earlier studies, these results restrict the H-0 mass to be above 38 GeV/c2 at the 95% confidence level. No signal is found for decays of Minimal Supersymmetric Standard Model neutral Higgs bosons to tau+-tau-. Limits are obtained for their decays to produce four jets. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM. UNIV ETAT MONS,FAC SCI,SERV PHYS PARTICULES ELEMENTS,B-7000 MONS,BELGIUM. UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE. UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY. COLL FRANCE,PHYS CORPUSCULAIRE LAB,F-75231 PARIS 05,FRANCE. CTR RECH NUCL,DIV HAUTES ENERGIES,GRP DELPHI,F-67037 STRASBOURG,FRANCE. UNIV GRENOBLE 1,INST SCI NUCL,F-38026 GRENOBLE,FRANCE. DEMOCRITOS NUCL RES CTR,INST NUCL PHYS,GR-15310 ATHENS,GREECE. UNIV GENOA,DIPARTIMENTO FIS,I-16126 GENOA,ITALY. IST NAZL FIS NUCL,I-16146 GENOA,ITALY. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. VRIJE UNIV BRUSSELS,IIHE,B-1050 BRUSSELS,BELGIUM. UNIV BOLOGNA,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY. CERN,CH-1211 GENEVA 23,SWITZERLAND. CTR RECH NUCL,GRP LEPSI,F-67037 STRASBOURG,FRANCE. UNIV HELSINKI,HIGH ENERGY PHYS RES INST,SF-00710 HELSINKI 71,FINLAND. IST NAZL FIS NUCL,BOLOGNA,ITALY. JOINT INST NUCL RES,MOSCOW 101000,USSR. UNIV KARLSRUHE,INST EXPTL KERNPHYS,W-7500 KARLSRUHE 1,GERMANY. INST NUCL PHYS,HIGH ENERGY PHYS LAB,PL-30055 KRAKOW 30,POLAND. UNIV PARIS 11,ACCELERATEUR LINEAIRE LAB,F-91405 ORSAY,FRANCE. UNIV LANCASTER,SCH PHYS & MAT,LANCASTER LA1 4YB,ENGLAND. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,ENGLAND. UNIV LUND,DEPT PHYS,S-22363 LUND,SWEDEN. UNIV LYON 1,F-69622 VILLEURBANNE,FRANCE. UNIV COMPLUTENSE MADRID,E-28040 MADRID,SPAIN. FAC SCI OUJDA,DEPT PHYS,OUJDA,MOROCCO. UNIV AIX MARSEILLE 2,F-13288 MARSEILLE 09,FRANCE. UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY. NIELS BOHR INST,DK-2100 COPENHAGEN 0,DENMARK. NATL INST NUCL PHYS,MILAN,ITALY. NATL TECH UNIV ATHENS,DEPT PHYS,GR-15773 ATHENS,GREECE. UNIV OSLO,DEPT PHYS,N-1000 OSLO 3,NORWAY. UNIV OXFORD,NUCL PHYS LAB,OXFORD OX1 3RH,ENGLAND. UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY. IST NAZL FIS NUCL,PADUA,ITALY. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. CENS,F-91191 GIF SUR YVETTE,FRANCE. IST NAZL FIS NUCL,IST SUPER SANITA,I-00161 ROME,ITALY. UNIV SANTANDER,FAC CIENCIAS,E-39005 SANTANDER,SPAIN. PROTVINO HIGH ENERGY PHYS INST,PROTVINO,USSR. UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10125 TURIN,ITALY. UNIV TRIESTE,DIPARTIMENTO FIS,I-34127 TRIESTE,ITALY. UNIV VALENCIA,CSIC,CTR MIXTO,INST FIS CORPUSCULAR,VALENCIA,SPAIN. AUSTRIAN ACAD SCI,INST HOCHENERGIEPHYS,A-1050 VIENNA,AUSTRIA. INST NUCL STUDIES,PL-00681 WARSAW,POLAND. UNIV WARSAW,PL-00681 WARSAW,POLAND. UNIV UPPSALA,DEPT RADIAT SCI,S-75121 UPPSALA,SWEDEN. UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,W-5600 WUPPERTAL 1,GERMANY. UNIV UDINE,IST FIS,I-33100 UDINE,ITALY. UNIV VALENCIA,DEPT FIS ATOM MOLEC & NUCL,E-46100 BURJASSOT,SPAIN. UNIV PARIS 07,F-75221 PARIS 05,FRANCE. UNIV ROME 2,DIPARTIMENTO FIS,I-00173 ROME,ITALY. NATL INST NUCL PHYS,ROME,ITALY. UNIV STOCKHOLM,INST PHYS,S-11346 STOCKHOLM,SWEDEN. UNIV PARIS 06,LPNHE,F-75230 PARIS 05,FRANCE. RP ABREU, P (reprint author), LIP,AV ELIAS GARCIA 14 LE,P-1000 LISBON,PORTUGAL. RI Fernandez-Alonso, Mercedes/F-2557-2016; Lozano-Bahilo, Julio/F-4881-2016; Olshevskiy, Alexander/I-1580-2016; Paganoni, Marco/A-4235-2016; Contreras Gonzalez, Jose Luis/K-7255-2014; Hernandez-Rey, Juan Jose/N-5955-2014; Abreu, Pedro/L-2220-2014; Barao, Fernando/O-2357-2016; Zaitsev, Alexandre/B-8989-2017; Monge, Maria Roberta/G-9127-2012; Ridky, Jan/H-6184-2014; Zukanovich Funchal, Renata/C-5829-2013; Pimenta, Mario/M-1741-2013; Gomez Cadenas, Juan Jose/L-2003-2014; Ragazzi, Stefano/D-2463-2009; Roditi, Itzhak/O-7448-2014; Zuniga, Juan/P-4385-2014; Michelotto, Michele/A-9571-2013; Matorras, Francisco/I-4983-2015; Ferrer, Antonio/H-2942-2015; Rovelli, Tiziano/K-4432-2015; de Groot, Nicolo/A-2675-2009; Katsanevas, Stavros/A-4297-2011; Ruiz, Alberto/E-4473-2011; Vaz, Pedro/K-2464-2013; branchini, paolo/A-4857-2011; Shellard, Ronald/G-4825-2012; Giacomelli, Paolo/B-8076-2009; Fruhwirth, Rudolf/H-2529-2012; Dracos, Marcos/K-2335-2012; Hallgren, Allan/A-8963-2013; Botner, Olga/A-9110-2013; Zalewski, Piotr/H-7335-2013; Marti-Garcia, Salvador/F-3085-2011; OI Fernandez-Alonso, Mercedes/0000-0002-1311-5275; Lozano-Bahilo, Julio/0000-0003-0613-140X; Olshevskiy, Alexander/0000-0002-8902-1793; Paganoni, Marco/0000-0003-2461-275X; Contreras Gonzalez, Jose Luis/0000-0001-7282-2394; Hernandez-Rey, Juan Jose/0000-0002-1527-7200; Abreu, Pedro/0000-0002-9973-7314; Barao, Fernando/0000-0002-8346-9941; Zaitsev, Alexandre/0000-0002-4961-8368; Matteuzzi, Clara/0000-0002-4047-4521; Monge, Maria Roberta/0000-0003-1633-3195; Ridky, Jan/0000-0001-6697-1393; Zukanovich Funchal, Renata/0000-0001-6749-0022; Pimenta, Mario/0000-0002-2590-0908; Gomez Cadenas, Juan Jose/0000-0002-8224-7714; Ragazzi, Stefano/0000-0001-8219-2074; Roditi, Itzhak/0000-0003-2363-5626; Zuniga, Juan/0000-0002-1041-6451; Michelotto, Michele/0000-0001-6644-987X; Matorras, Francisco/0000-0003-4295-5668; Ferrer, Antonio/0000-0003-0532-711X; Rovelli, Tiziano/0000-0002-9746-4842; Ruiz, Alberto/0000-0002-3639-0368; Vaz, Pedro/0000-0002-7186-2359; Shellard, Ronald/0000-0002-2983-1815; Dracos, Marcos/0000-0003-0514-193X; DE MIN, ALBERTO/0000-0002-8130-9389; Demaria, Natale/0000-0003-0743-9465; Bonesini, Maurizio/0000-0001-5119-1896; Sannino, Mario/0000-0001-7700-8383; De Lotto, Barbara/0000-0003-3624-4480; Benlloch Baviera, Jose Maria/0000-0001-6073-1436; Tabarelli de Fatis, Tommaso/0000-0001-6262-4685; Lacasta, Carlos/0000-0002-2623-6252 NR 53 TC 46 Z9 46 U1 0 U2 10 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 MAR 30 PY 1992 VL 373 IS 1 BP 3 EP 34 DI 10.1016/0550-3213(92)90447-J PG 32 WC Physics, Particles & Fields SC Physics GA HN232 UT WOS:A1992HN23200001 ER PT J AU ARMSTRONG, TA BETTONI, D BHARADWAJ, V BIINO, C BORREANI, G BROEMMELSIEK, DR BUZZO, A CALABRESE, R CECCUCCI, A CESTER, R CHURCH, MD DALPAIZ, P DALPIAZ, PF DAMERI, M DIMITROYANNIS, D FABBRI, M FAST, JE FERRONI, S GEE, M GINSBURG, CM GOLLWITZER, KE HAHN, AA HASAN, MA HSUEH, SY LEWIS, RA LUPPI, E MACRI, M MAJEWSKA, AM MANDELKERN, MA MARCHETTO, F MARINELLI, M MARQUES, JL MARSH, W MARTINI, M MASUZAWA, M MENICHETTI, E MIGLIORI, A MUSSA, R PALESTINI, S PASTRONE, N PATRIGNANI, C PEOPLES, J PESANDO, L PETRUCCI, F PIA, MG PORDES, S RAPIDIS, PA RAY, RE REID, JD RINAUDO, G ROSEN, JL SANTRONI, A SARMIENTO, M SAVRIE, M SCHULTZ, J SETH, KK SMITH, GA TECCHIO, L TOMMASINI, S TROKENHEIM, S WEBER, MF WERKEMA, SJ ZHANG, Y ZHAO, JL ZIOULAS, G ZITO, M AF ARMSTRONG, TA BETTONI, D BHARADWAJ, V BIINO, C BORREANI, G BROEMMELSIEK, DR BUZZO, A CALABRESE, R CECCUCCI, A CESTER, R CHURCH, MD DALPAIZ, P DALPIAZ, PF DAMERI, M DIMITROYANNIS, D FABBRI, M FAST, JE FERRONI, S GEE, M GINSBURG, CM GOLLWITZER, KE HAHN, AA HASAN, MA HSUEH, SY LEWIS, RA LUPPI, E MACRI, M MAJEWSKA, AM MANDELKERN, MA MARCHETTO, F MARINELLI, M MARQUES, JL MARSH, W MARTINI, M MASUZAWA, M MENICHETTI, E MIGLIORI, A MUSSA, R PALESTINI, S PASTRONE, N PATRIGNANI, C PEOPLES, J PESANDO, L PETRUCCI, F PIA, MG PORDES, S RAPIDIS, PA RAY, RE REID, JD RINAUDO, G ROSEN, JL SANTRONI, A SARMIENTO, M SAVRIE, M SCHULTZ, J SETH, KK SMITH, GA TECCHIO, L TOMMASINI, S TROKENHEIM, S WEBER, MF WERKEMA, SJ ZHANG, Y ZHAO, JL ZIOULAS, G ZITO, M TI STUDY OF THE CHI-1 AND CHI-2 CHARMONIUM STATES FORMED IN (P)BAR-P ANNIHILATIONS SO NUCLEAR PHYSICS B LA English DT Article ID ALUMINIZED MYLAR TUBES; P-WAVE QUARKONIUM; CHARGE DIVISION; DECAYS; CHAMBER; SPECTROSCOPY; FERMILAB; BARYONS; SYSTEM; QCD AB We report on a study of the chi-1(P-3(1)) and chi-2(P-3(2)) states of charmonium formed in antiproton-proton annihilations. An energy scan through the resonances, performed with a very narrow momentum-band beam of antiprotons intersecting a hydrogen jet target, enables us to perform very precise measurements of the mass and the total width of the two resonances. From a sample of 513-chi-1 and 585-chi-2 events, we find M(chi-1) = (3510.53 +/- 0. 13) MeV/c2, M(chi-2) = (3556.15 +/- 0.14) MeV/c2, GAMMA(chi-1) = (0-88 +/- 0.14) MeV and GAMMA(chi-2) = (1.98 +/- 0.18) MeV. From our measurement of the quantity GAMMA(R --> ppBAR) X BR(R --> J/psi-gamma) x BR(J/psi --> e+ e-), using known branching ratios, we obtain GAMMA(chi-1 --> ppBAR) = (69 +/- 13) eV and GAMMA(chi-2 --> ppBAR) = (180 +/- 31) eV. C1 UNIV GENOA,I-16146 GENOA,ITALY. NORTHWESTERN UNIV,EVANSTON,IL 60208. IST NAZL FIS NUCL,TURIN,ITALY. FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV FERRARA,I-44100 FERRARA,ITALY. UNIV CALIF IRVINE,IRVINE,CA 92717. UNIV TURIN,I-10125 TURIN,ITALY. IST NAZL FIS NUCL,FERRARA,ITALY. RP ARMSTRONG, TA (reprint author), PENN STATE UNIV,UNIV PK,PA 16802, USA. RI Patrignani, Claudia/C-5223-2009; Luppi, Eleonora/A-4902-2015; Calabrese, Roberto/G-4405-2015; Pia, Maria Grazia/C-7034-2012 OI Patrignani, Claudia/0000-0002-5882-1747; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; Pia, Maria Grazia/0000-0002-3579-9639 NR 38 TC 77 Z9 77 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD MAR 30 PY 1992 VL 373 IS 1 BP 35 EP 54 DI 10.1016/0550-3213(92)90448-K PG 20 WC Physics, Particles & Fields SC Physics GA HN232 UT WOS:A1992HN23200002 ER PT J AU MAINIERI, R AF MAINIERI, R TI ZETA-FUNCTION FOR THE LYAPUNOV EXPONENT OF A PRODUCT OF RANDOM MATRICES SO PHYSICAL REVIEW LETTERS LA English DT Article ID WEAK DISORDER EXPANSION; STRANGE SETS; SYSTEMS AB A cycle expansion for the Lyapunov exponent of a product of random matrices is derived. The formula is nonperturbative and numerically effective, which allows the Lyapunov exponent to be computed to high accuracy. In particular, the free energy and the heat capacity are computed for the one-dimensional Ising model with quenched disorder. The formula is derived by using a Bernoulli dynamical system to mimic the randomness. C1 UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP MAINIERI, R (reprint author), NEILS BOHR INST,BLEGDAMSVEJ 17,DK-2100 COPENHAGEN 0,DENMARK. NR 18 TC 18 Z9 18 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 MAR 30 PY 1992 VL 68 IS 13 BP 1965 EP 1968 DI 10.1103/PhysRevLett.68.1965 PG 4 WC Physics, Multidisciplinary SC Physics GA HL670 UT WOS:A1992HL67000001 ER PT J AU DIMOPOULOS, S HALL, LJ RABY, S AF DIMOPOULOS, S HALL, LJ RABY, S TI PREDICTIVE FRAMEWORK FOR FERMION MASSES IN SUPERSYMMETRIC THEORIES SO PHYSICAL REVIEW LETTERS LA English DT Article ID GRAND UNIFIED THEORIES; QUARK MASSES; UNIFICATION; WEAK; DECAYS; SU(5); GUTS AB The fermion masses and mixings are derived from a small number of input parameters. The resulting six predictions are consistent with data and have interesting consequences for future experiments. The top quark is heavy, near 188 GeV; its precise mass is sensitive to V(cb). C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP DIMOPOULOS, S (reprint author), STANFORD UNIV,DEPT PHYS,STANFORD,CA 94305, USA. NR 26 TC 234 Z9 234 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 MAR 30 PY 1992 VL 68 IS 13 BP 1984 EP 1987 DI 10.1103/PhysRevLett.68.1984 PG 4 WC Physics, Multidisciplinary SC Physics GA HL670 UT WOS:A1992HL67000006 ER PT J AU BEYERMANN, WP HUNDLEY, MF THOMPSON, JD DIEDERICH, FN GRUNER, G AF BEYERMANN, WP HUNDLEY, MF THOMPSON, JD DIEDERICH, FN GRUNER, G TI LOW-TEMPERATURE SPECIFIC-HEAT OF C-60 SO PHYSICAL REVIEW LETTERS LA English DT Article ID CARBON AB We have measured a large specific heat of polycrystalline C60 from T = 1.4 to 20 K. The data were adequately fitted by a model containing Debye terms, Einstein oscillators, and a linear contribution. An analysis incorporating both vibrational and strongly coupled rotational degrees of freedom expected for the simple-cubic structure at low temperatures is proposed. We also discuss a possible interpretation based on a fairly narrow feature in the excitation spectrum. The large linear term may be a consequence of disorder resulting in a distribution of two-level tunneling centers. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024. UNIV CALIF LOS ANGELES,DEPT CHEM,LOS ANGELES,CA 90024. UNIV CALIF LOS ANGELES,CTR SOLID STATE SCI,LOS ANGELES,CA 90024. NR 21 TC 92 Z9 92 U1 0 U2 8 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 MAR 30 PY 1992 VL 68 IS 13 BP 2046 EP 2049 DI 10.1103/PhysRevLett.68.2046 PG 4 WC Physics, Multidisciplinary SC Physics GA HL670 UT WOS:A1992HL67000022 ER PT J AU JESSON, DE PENNYCOOK, SJ BARIBEAU, JM HOUGHTON, DC AF JESSON, DE PENNYCOOK, SJ BARIBEAU, JM HOUGHTON, DC TI STEP-DRIVEN LATERAL SEGREGATION AND LONG-RANGE ORDERING DURING SIXGE1-X EPITAXIAL-GROWTH SO PHYSICAL REVIEW LETTERS LA English DT Article ID SCANNING TUNNELING MICROSCOPY; SI1-XGEX; SI(001); CRYSTALS; SURFACE; SILICON AB Lateral segregation occurring at advancing steps is identified as the origin of a new long-range ordered phase in SixGe1-x alloys, which has been imaged directly. The segregation occurs at monolayer height type-S(B) steps under island growth conditions and is strongly dependent on growth kinetics. C1 NATL RES COUNCIL CANADA, INST MICROSTRUCT SCI, OTTAWA K1A 0R6, ONTARIO, CANADA. RP JESSON, DE (reprint author), OAK RIDGE NATL LAB, DIV SOLID STATE, OAK RIDGE, TN 37831 USA. OI Jesson, David/0000-0003-0897-1445 NR 23 TC 50 Z9 50 U1 0 U2 3 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 30 PY 1992 VL 68 IS 13 BP 2062 EP 2065 DI 10.1103/PhysRevLett.68.2062 PG 4 WC Physics, Multidisciplinary SC Physics GA HL670 UT WOS:A1992HL67000026 ER PT J AU ROJO, AG MAHAN, GD AF ROJO, AG MAHAN, GD TI CURRENT DRAG FROM THE VANDERWAALS INTERACTION SO PHYSICAL REVIEW LETTERS LA English DT Article AB We consider the van der Waals interaction for systems carrying a nonzero current. We show that in simple cases like two parallel wires or sheets, the van der Waals attraction increases quadratically with the difference between the currents in the two subsystems. This implies a nonzero current drag at zero temperature, a new effect that could be detected experimentally. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP ROJO, AG (reprint author), UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996, USA. NR 16 TC 46 Z9 46 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 MAR 30 PY 1992 VL 68 IS 13 BP 2074 EP 2077 DI 10.1103/PhysRevLett.68.2074 PG 4 WC Physics, Multidisciplinary SC Physics GA HL670 UT WOS:A1992HL67000029 ER PT J AU EILAM, G HEWETT, JL SONI, A AF EILAM, G HEWETT, JL SONI, A TI CP ASYMMETRIES INDUCED BY PARTICLE WIDTHS - APPLICATION TO TOP-QUARK DECAYS - REPLY SO PHYSICAL REVIEW LETTERS LA English DT Letter C1 UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706. BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. TECHNION ISRAEL INST TECHNOL,DEPT PHYS,IL-32000 HAIFA,ISRAEL. RP EILAM, G (reprint author), MICHIGAN STATE UNIV,DEPT PHYS & ASTRON,E LANSING,MI 48824, USA. NR 2 TC 18 Z9 18 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 MAR 30 PY 1992 VL 68 IS 13 BP 2103 EP 2103 DI 10.1103/PhysRevLett.68.2103 PG 1 WC Physics, Multidisciplinary SC Physics GA HL670 UT WOS:A1992HL67000037 ER PT J AU KOGAN, VG SIMONOV, AY AF KOGAN, VG SIMONOV, AY TI PROXIMITY EFFECT IN YBA2CU3O7/Y0.6PR0.4BA2CU3O7/YBA2CU3O7 JUNCTIONS - COMMENT SO PHYSICAL REVIEW LETTERS LA English DT Letter ID NORMAL-METAL C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. RP KOGAN, VG (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011, USA. RI Simonov, Andrei/C-1697-2015 OI Simonov, Andrei/0000-0001-6452-0214 NR 4 TC 12 Z9 12 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 MAR 30 PY 1992 VL 68 IS 13 BP 2106 EP 2106 DI 10.1103/PhysRevLett.68.2106 PG 1 WC Physics, Multidisciplinary SC Physics GA HL670 UT WOS:A1992HL67000040 ER PT J AU FRANCE, LL KIELECZAWA, J DUNN, JJ HIND, G SUTHERLAND, JC AF FRANCE, LL KIELECZAWA, J DUNN, JJ HIND, G SUTHERLAND, JC TI STRUCTURAL-ANALYSIS OF AN OUTER SURFACE PROTEIN FROM THE LYME-DISEASE SPIROCHETE, BORRELIA-BURGDORFERI, USING CIRCULAR-DICHROISM AND FLUORESCENCE SPECTROSCOPY SO BIOCHIMICA ET BIOPHYSICA ACTA LA English DT Article DE SPIROCHETE; LYME DISEASE; OUTER SURFACE PROTEIN; PROTEIN STRUCTURE; CIRCULAR DICHROISM; FLUORESCENCE SPECTROSCOPY ID SECONDARY-STRUCTURE; GLOBULAR-PROTEINS; PREDICTION; ACID; CONFORMATION; SPECTROMETER; ABSORPTION; SEQUENCE; OSPA AB The etiological agent of Lyme disease is the tick-borne spirochete, Borrelia burgdorferi. A major antigen of B. burgdorferi is a 31 kDa lipoprotein called outer surface protein A (OspA). Recently, a truncated form of OspA (lac-king 17 amino acids at the N-terminus) was cloned, expressed and purified in large quantities (Dunn, J.J., Lade, B.A. and Barbour, A.G. (1990) Protein Expression and Purification 1, 159-168). The truncated protein (OspA-257) is water-soluble, retains the ability to bind antibodies from the sera of Lyme disease patients and may prove useful in development of a vaccine against Lyme disease. We have used far UV circular dichroism (CD) and fluorescence spectroscopy to characterize the secondary structure of and to study conformational changes in OspA-257. CD spectra from 260 to 178 nm predict five classes of secondary structure: alpha-helix (11%), anti-parallel beta-sheet (32%), parallel beta-sheet (10%), beta-turns (18%) and aperiodic structures (including 'random coil') (30%). Analysis of the primary sequence of OspA yielded the most likely sites for a-helical regions (residues 100-107, 121-134, 253-273) and for antigenic determinants (Lys-46, Asp-82, Lys-231). CD spectra of the native protein show little change from pH 3 to 11. Thermal denaturation curves, indicate that 'salt bridges' play a role in stabilizing the native protein. Both thermal and chemical denaturations that eliminate all secondary structure as judged by CD or fluorescence are reversible. Denaturation by guanidine-HCl (gdn-HCl) appears to be a cooperative, two-state transition, as indicated by a sudden change in the CD spectrum at approximately 0.75 M gdn-HCl, and an isodichroic point at 208 nm in all CD spectra measured from 0.0-1.75 M gdn-HCl. C1 BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. FU NIGMS NIH HHS [GM34662] NR 34 TC 19 Z9 21 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0006-3002 J9 BIOCHIM BIOPHYS ACTA PD MAR 27 PY 1992 VL 1120 IS 1 BP 59 EP 68 DI 10.1016/0167-4838(92)90424-C PG 10 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA HN827 UT WOS:A1992HN82700008 PM 1554741 ER PT J AU TAVANI, M BROOKSHAW, L AF TAVANI, M BROOKSHAW, L TI THE ORIGIN OF PLANETS ORBITING MILLISECOND PULSARS SO NATURE LA English DT Article ID ECLIPSING BINARY; TERZAN-5; MASS AB AT least two Earth-sized planets have been discovered around the 6-ms pulsar PSR1257 + 12 (ref. 1), which, like millisecond pulsars in general, has probably been spun up by accretion of material from a companion star. In addition, two 'star-vaporizing' millisecond pulsars (SVPs), 1957 + 20 (ref. 2) and 1744-24A (refs 3, 4), show evidence of mass outflows from their low-mass companions, which are thought to be vaporized by pulsar radiation. Building on this, we suggest a model for the formation of planets around millisecond pulsars such as 1257 + 12, which no longer have stellar companions. We present detailed hydrodynamical models which suggest that planet formation can occur either in a low-mass X-ray binary progenitor to a progenitor of an SVP when the neutron star is accreting material driven off its companion by X-ray irradiation (refs 5, 6), or after a pulsar has formed and is vaporizing its companion 5,7-9. In both cases a circum-binary disk is created in which planets can form on a timescale of 10(5)-10(6) years 10 (which is short compared with the binary evolution timescales of the parent systems) and the planets can survive a second phase in which the companion star moves towards the pulsar and is completely vaporized 5. C1 UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720. RP TAVANI, M (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA 94550, USA. OI Tavani, Marco/0000-0003-2893-1459 NR 25 TC 23 Z9 23 U1 0 U2 0 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD MAR 26 PY 1992 VL 356 IS 6367 BP 320 EP 322 DI 10.1038/356320a0 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HK794 UT WOS:A1992HK79400056 ER PT J AU BLANK, ML SMITH, ZL SNYDER, F AF BLANK, ML SMITH, ZL SNYDER, F TI CONTRIBUTING FACTORS IN THE TRAFFICKING OF [H-3] ARACHIDONATE BETWEEN PHOSPHOLIPIDS SO BIOCHIMICA ET BIOPHYSICA ACTA LA English DT Article DE ARACHIDONIC ACID; ARACHIDONATE; ARACHIDONATE MOVEMENT; HL-60 CELL; PHOSPHOLIPID, PLASMALOGEN AND ETHER-LINKED ID PLATELET-ACTIVATING FACTOR; RABBIT ALVEOLAR MACROPHAGES; PERFORMANCE LIQUID-CHROMATOGRAPHY; AORTIC ENDOTHELIAL-CELLS; CULTURED NEURO-BLASTOMA; ARACHIDONIC-ACID; ETHER PHOSPHOLIPIDS; FATTY-ACIDS; RAT PLATELETS; POLYMORPHONUCLEAR LEUKOCYTES AB Cultured human promyelocytic leukemia cells (HL-60), depleted of arachidonic acid by continued growth in serum-free media, were used as a model system to examine various factors that control the incorporation and distribution of [H-3]arachidonic acid into classes and subclasses of cellular lipids. Increasing the culture media concentration of [H-3]arachidonic acid from 1.10(-8) M to 1.10(-5) M caused a greater percentage of the cellular tritium to be distributed into triacylglycerols (from < 1% at 1.10(-8) M to 38% at 1.10(-5) M) with a corresponding decrease in cellular [H-3]diradylglycerophosphoethanolamine (from 53% at 1.10(-8) M to 12% at 1.10(-5) M) during 2 h incubations. A greater proportion of the tritium present in diradylglycerophosphoethanolamine and diradylglycerophosphocholine, at the higher media concentration of [H-3]arachidonic acid (1.10(-5) M), was found in the diacyl subclasses of these two lipids than was observed at the lower concentrations (< 1.10(-6) M) of [H-3]arachidonic acid. Significant amounts of diarachidonoyl molecular species were found in the phosphatidyl-ethanolamine (10%) and phosphatidylcholine (15%) of HL-60 cells that were labeled for 2 h with 1.10(-5) M [H-3]arachidonic acid. This was the only molecular species of phosphatidylcholine to completely disappear when prelabeled cells were placed in arachidonate-free media for 22 h. Prelabeling-chase experiments with 1.10(-5) M [H-3]arachidonic acid were consistent with movement of [H-3]arachidonate from triacylglycerols into diradylglycerophosphatides and from diacylphospholipids into ether-linked phospholipids. Increasing the concentration of HL-60 cells in the incubations influenced the distribution of [H-3]arachidonic acid in cellular lipid classes in a manner analogous to decreasing the concentration of [H-3]arachidonic acid in the media. Increasing the endogenous level of cellular arachidonate in phospholipid classes with supplements of unlabeled arachidonic acid changed the subsequent lipid class distribution of a low concentration (1.10(-8) M) of [H-3]arachidonic acid to resemble results obtained with a much higher mass level of [H-3]arachidonate in arachidonate depleted cells. HL-60 cells differentiated into granulocytes by treatment with dimethyl sulfoxide incorporated less [H-3]arachidonic acid but had a greater proportion associated with alkylacylglycerophosphocholine and alk-1-enylacylglycerophosphoethanolamine than undifferentiated HL-60 cells. C1 OAK RIDGE ASSOCIATED UNIV,DIV MED SCI,POB 117,OAK RIDGE,TN 37830. FU PHS HHS [35495-04A1-02] NR 53 TC 26 Z9 26 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0006-3002 J9 BIOCHIM BIOPHYS ACTA PD MAR 25 PY 1992 VL 1124 IS 3 BP 262 EP 272 DI 10.1016/0005-2760(92)90138-L PG 11 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA HN137 UT WOS:A1992HN13700007 PM 1576167 ER PT J AU GSCHNEIDER, KA AF GSCHNEIDER, KA TI AN ODYSSEY THROUGH THE RARE-EARTHS - A QUEST FOR KNOWLEDGE SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article; Proceedings Paper CT 19TH CONF ON RARE EARTH RESEARCH CY JUL 14-19, 1991 CL LEXINGTON, KY SP UNIV KENTUCKY, RARE EARTH RES CONF ID HIGH MAGNETIC-FIELDS; HEAT-CAPACITY; ALPHA-CERIUM AB Research highlights on rare earth materials are described from the earliest days as a graduate student during the mid 1950s, through the six years at Los Alamos, to the last 28 at Iowa State University. The early work was concerned with the rare earth carbides which led to an appreciation of systematics of the properties of rare earth materials. Use of the systematic variation of properties and behaviors is a powerful tool in understanding the nature of certain phenomena - in particular solid solution formation and the role of 4f electrons in bonding (4f hybridization). Some of the anomalous 4f properties of cerium metal and cerium compounds, and the quenching of spin fluctuations in exchanged enhanced materials, are also discussed. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT MAT SCI & ENGN,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,CTR RARE EARTH INFORMAT,AMES,IA 50011. RP GSCHNEIDER, KA (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 34 TC 2 Z9 2 U1 1 U2 3 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD MAR 25 PY 1992 VL 180 BP 1 EP 13 DI 10.1016/0925-8388(92)90358-G PG 13 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA HN683 UT WOS:A1992HN68300004 ER PT J AU STUMP, NA PESTERFIELD, LL SCHWEITZER, GK PETERSON, JR AF STUMP, NA PESTERFIELD, LL SCHWEITZER, GK PETERSON, JR TI A HIGH-RESOLUTION SPECTRAL STUDY OF LI3EU(2,6-PYRIDINEDICARBOXYLATO)3 SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article; Proceedings Paper CT 19TH CONF ON RARE EARTH RESEARCH CY JUL 14-19, 1991 CL LEXINGTON, KY SP UNIV KENTUCKY, RARE EARTH RES CONF ID RARE-EARTH CARBOXYLATES; MOLECULAR STRUCTURE; CRYSTAL AB Several electronic levels of Li3Eu(2,6-pyridinedicarboxylato)3 have been studied through the use of low-temperature high-resolution single- and two-photon excitation emission spectroscopy. The observed shifts in the emission spectrum are described. The spectrum obtained exhibits the emission transitions characteristic for a Eu(III) ion in a distorted D3h symmetry site. C1 OAK RIDGE NATL LAB,DIV CHEM,TRANSURANIUM RES LAB,OAK RIDGE,TN 37831. RP STUMP, NA (reprint author), UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996, USA. NR 7 TC 12 Z9 12 U1 1 U2 1 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD MAR 25 PY 1992 VL 180 BP 141 EP 149 DI 10.1016/0925-8388(92)90373-H PG 9 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA HN683 UT WOS:A1992HN68300019 ER PT J AU LIU, GK BEITZ, JV KANELLAKOPULOS, B AF LIU, GK BEITZ, JV KANELLAKOPULOS, B TI LASER-INDUCED FLUORESCENCE STUDIES OF TERBIUM TRISCYCLOPENTADIENIDE SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article; Proceedings Paper CT 19TH CONF ON RARE EARTH RESEARCH CY JUL 14-19, 1991 CL LEXINGTON, KY SP UNIV KENTUCKY, RARE EARTH RES CONF ID COORDINATION; COMPLEXES; ADDUCTS AB Time- and wavelength-resolved studies of luminescence from the 5D4 state of Tb3+ in thin films of Tb(C5H5)3 have been carried out at temperatures as low as 4 K. The energy level structure of the 5D4 old and the 7F septet have been determined from excitation and emission spectra. Spectral evidence for two major Tb3+ ion sites has been obtained. With increasing excitation intensity at 4 K (or even at low excitation intensity and above 20 K), emission attributable to Tb3+ on new sites occurs. Observed non-exponential luminescence decays are explained in terms of energy transfer processes among Tb3+ ions on major ion and defect or trap sites. C1 KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH,INST HEISSE CHEM,W-7500 KARLSRUHE 1,GERMANY. RP LIU, GK (reprint author), ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439, USA. NR 17 TC 3 Z9 3 U1 0 U2 1 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD MAR 25 PY 1992 VL 180 BP 157 EP 163 DI 10.1016/0925-8388(92)90375-J PG 7 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA HN683 UT WOS:A1992HN68300021 ER PT J AU PESTERFIELD, LL STUMP, NA SCHWEITZER, GK PETERSON, JR AF PESTERFIELD, LL STUMP, NA SCHWEITZER, GK PETERSON, JR TI PERTURBATIONS OF THE LUMINESCENCE SPECTRA OF EUROPIUM-EDTA SALTS CAUSED BY SELECTED MONOVALENT COUNTERIONS SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article; Proceedings Paper CT 19TH CONF ON RARE EARTH RESEARCH CY JUL 14-19, 1991 CL LEXINGTON, KY SP UNIV KENTUCKY, RARE EARTH RES CONF ID COMPLEXES AB High resolution emission studies of europium-EDTA salts of the form M(I)Eu(EDTA), where M = Li, Na, K, Rb, Cs, Ag and Tl, have been carried out. Each europium-EDTA salt produced a distinct luminescence spectrum recorded over the spectral range which included the transitions in the europium(III) ion from the 5D0 level to the F-7(0-4) levels. Spectral changes included slight shifts in peak position and varying line splitting patterns. Evaluations of the splitting patterns suggest that the site symmetries of the europium(III) ion in all compounds are low. Tentative site symmetry assignments have been made to fit best the observed luminescence spectra. C1 OAK RIDGE NATL LAB,DIV CHEM,TRANSURANIUM RES LAB,OAK RIDGE,TN 37831. RP PESTERFIELD, LL (reprint author), UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996, USA. NR 13 TC 7 Z9 7 U1 0 U2 3 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD MAR 25 PY 1992 VL 180 BP 201 EP 207 DI 10.1016/0925-8388(92)90381-I PG 7 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA HN683 UT WOS:A1992HN68300027 ER PT J AU CLARK, DL SATTELBERGER, AP VANDERSLUYS, WG WATKIN, JG AF CLARK, DL SATTELBERGER, AP VANDERSLUYS, WG WATKIN, JG TI NEW DEVELOPMENT IN ACTINIDE ALKOXIDE CHEMISTRY SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article; Proceedings Paper CT 19TH CONF ON RARE EARTH RESEARCH CY JUL 14-19, 1991 CL LEXINGTON, KY SP UNIV KENTUCKY, RARE EARTH RES CONF ID HYDROGEN-DEUTERIUM EXCHANGE; CRYSTAL-STRUCTURE; ARYLOXIDE COMPLEX; URANIUM; COORDINATION; DERIVATIVES; ACTIVATION; ADDUCTS; THORIUM; BOND AB Much new information on the synthesis, physicochemical properties, solid state structures, and reaction chemistry of actinide alkoxide complexes has begun to emerge in the last decade. We have developed several new starting materials that facilitate easy entry into thorium and uranium alkoxide chemistry. Synthetic pathways employed in our laboratories to obtain alkoxide and aryloxide complexes of the actinides include (1) metathesis of the iodide ligands in Ul3(THF)4 and Thl4(THF)4 with potassium salts of the desired ligand, or (2) protonolysis of metal-nitrogen or metal-carbon bonds by alcohols or phenols. The rich structural and reaction chemistry of these new complexes is described along with prospects for future developments in the field. RP CLARK, DL (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV ISOTOPE & NUCL CHEM,LOS ALAMOS,NM 87545, USA. RI Clark, David/A-9729-2011 NR 30 TC 25 Z9 25 U1 0 U2 3 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD MAR 25 PY 1992 VL 180 BP 303 EP 315 DI 10.1016/0925-8388(92)90396-Q PG 13 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA HN683 UT WOS:A1992HN68300042 ER PT J AU REDDMANN, H SCHULTZE, H AMBERGER, HD SHALIMOFF, GV EDELSTEIN, NM AF REDDMANN, H SCHULTZE, H AMBERGER, HD SHALIMOFF, GV EDELSTEIN, NM TI THE ELECTRONIC-STRUCTURE OF ORGANOMETALLIC COMPLEXES OF THE F ELEMENTS .28. INTERPRETATION OF THE OPTICAL AND MAGNETOCHEMICAL DATA OF A CYCLOHEXYLISOCYANIDE ADDUCT DERIVED FROM TRIS(ETA-5-CYCLOPENTADIENYL)SAMARIUM(III) SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article; Proceedings Paper CT 19TH CONF ON RARE EARTH RESEARCH CY JUL 14-19, 1991 CL LEXINGTON, KY SP UNIV KENTUCKY, RARE EARTH RES CONF ID FIELD SPLITTING PATTERN; ABSORPTION-SPECTRUM; PARAMETERIZATION AB The absorption spectrum of Cp3Sm . CNC6H11 has been measured at room temperature and at low temperatures in a hydrocarbon glass and in a KBr pellet. Electron paramagnetic resonance and magnetic susceptibility measurements are also reported in this paper. The observed optical bands were assigned on the basis of calculations which assumed that the crystal field parameters of the samarium complex were the same as for the previously analyzed Cp3Pr . CNC8H11. The parameters of an empirical Hamiltonian were fitted to the energies of 39 levels to give an r.m.s. deviation of 21 cm-1. On the basis of the wavefunctions of the crystal field.ground state obtained from the fit, the ground state g values and the temperature-dependent magnetic susceptibility were calculated and compared with the experimental values. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RP REDDMANN, H (reprint author), UNIV HAMBURG,INST ANORGAN & ANGEW CHEM,MARTIN LUTHER KING PLATZ 6,W-2000 HAMBURG 13,GERMANY. NR 14 TC 10 Z9 10 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD MAR 25 PY 1992 VL 180 BP 337 EP 341 DI 10.1016/0925-8388(92)90399-T PG 5 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA HN683 UT WOS:A1992HN68300045 ER PT J AU NASH, KL HORWITZ, EP GATRONE, RC RICKERT, PG AF NASH, KL HORWITZ, EP GATRONE, RC RICKERT, PG TI THE EFFECT OF LIGAND RIGIDITY ON THE STABILITY OF EUROPIUM(III) COMPLEXES WITH SUBSTITUTED DIGLYCOLIC ACIDS SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article; Proceedings Paper CT 19TH CONF ON RARE EARTH RESEARCH CY JUL 14-19, 1991 CL LEXINGTON, KY SP UNIV KENTUCKY, RARE EARTH RES CONF AB The stability of europium(III) complexes with substituted diglycolic acids is altered by changing the ligand rigidity. The diglycolate analog tetrahydrofuran-2,3,4,5-tetracarboxylic acid (THFTCA) achieves nearly an order of magnitude stronger binding of europium(III) in dilute acidic solutions, partly as a result of favorable complexation geometry forced by the tetrahydrofuran ring. The analogous aromatic ring systems furan-2,3,4,5-tetracarboxylic acid and furan-2,5-dicarboxylic acid, which force the carboxylate groups to assume a planar configuration, exhibit much lower affinity for europium(III) in dilute acid. The observed increase in stability for the THCA complex implies that one or two of the six geometric isomers of THFTCA must be dominant. RP NASH, KL (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 13 TC 5 Z9 5 U1 2 U2 5 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD MAR 25 PY 1992 VL 180 BP 375 EP 381 DI 10.1016/0925-8388(92)90405-X PG 7 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA HN683 UT WOS:A1992HN68300051 ER PT J AU SILBER, HB AF SILBER, HB TI PROCEEDINGS OF THE 19TH RARE-EARTH RESEARCH CONFERENCE, LEXINGTON, KENTUCKY, JULY 14-19, 1991 .1. - PREFACE SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Editorial Material C1 ARGONNE NATL LAB,ARGONNE,IL 60439. RP SILBER, HB (reprint author), SAN JOSE STATE UNIV,SAN JOSE,CA 95192, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD MAR 25 PY 1992 VL 180 BP R17 EP R17 DI 10.1016/0925-8388(92)90356-E PG 1 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA HN683 UT WOS:A1992HN68300002 ER PT J AU DIECKMAN, SL RIZO, P GOPALSAMI, N HEESCHEN, JP BOTTO, RE AF DIECKMAN, SL RIZO, P GOPALSAMI, N HEESCHEN, JP BOTTO, RE TI 3-DIMENSIONAL MICROSCOPIC H-1-NMR IMAGING OF RIGID POLYMERS SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Note ID SOLIDS; IMAGES C1 CEN,CEA,DEPT SYST,ELECTR & TECHNOL INFORMAT LAB,F-38041 GRENOBLE,FRANCE. DOW CHEM CO USA,MIDLAND,MI 48667. RP DIECKMAN, SL (reprint author), ARGONNE NATL LAB,DIV MAT & COMPONENTS TECHNOL,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 20 TC 13 Z9 13 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAR 25 PY 1992 VL 114 IS 7 BP 2717 EP 2719 DI 10.1021/ja00033a055 PG 3 WC Chemistry, Multidisciplinary SC Chemistry GA HK671 UT WOS:A1992HK67100055 ER PT J AU ORTIZ, JV HAY, PJ MARTIN, RL AF ORTIZ, JV HAY, PJ MARTIN, RL TI ROLE OF D-ORBITALS AND F-ORBITALS IN THE GEOMETRIES OF LOW-VALENT ACTINIDE COMPOUNDS - ABINITIO STUDIES OF U(CH3)3, NP(CH3)3, AND PU(CH3)3 SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Note ID COMPLEXES; COORDINATION; MOLECULES C1 UNIV NEW MEXICO,DEPT CHEM,ALBUQUERQUE,NM 87131. RP ORTIZ, JV (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 18 TC 88 Z9 88 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAR 25 PY 1992 VL 114 IS 7 BP 2736 EP 2737 DI 10.1021/ja00033a068 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA HK671 UT WOS:A1992HK67100068 ER PT J AU RITCHIE, JP AF RITCHIE, JP TI SOME COMMENTS CONCERNING THE USE OF STATIC CHARGE-DISTRIBUTIONS FOR PREDICTING CHEMICAL-REACTIVITY SO THEOCHEM-JOURNAL OF MOLECULAR STRUCTURE LA English DT Article ID ELECTROPHILIC AROMATIC-SUBSTITUTION; NITROARENES; MOLECULES; DIPROTONATION; PARAMETERS; BENZENE; ATOMS AB Static charge distributions are frequently used for interpreting and predicting chemical reactivity. As examples, the electrophilic aromatic substitution of nitrobenzene and aniline were specifically examined with the use of a proton as a model electrophile. The electrostatic potentials of these compounds and energies and geometries of the protonated products were calculated. It was found that the minimum in the potential may indeed indicate the site most susceptible to electrophilic attack. Nevertheless, this site may not be the one found substituted under normal laboratory conditions. Some experimental evidence is pointed out that demonstrates the intermediacy of these initially formed protonated species. Consequently, static charge distributions will have limited use in predicting substitution sites of electrophilic reactions, unless prior experience in a series of compounds is available. A generalization is stated: the charge distribution of the reactant most nearly resembles the transition state nearest in energy. Thus, the static charge distribution should indicate sites of kinetic attack by incoming reagents. Similarly, the static charge distribution is most closely related to complexes that perturb the initial distribution the least. Examples are likely to be the formation of encounter complexes and hydrogen-bonded complexes. RP RITCHIE, JP (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,MS-B214,LOS ALAMOS,NM 87545, USA. NR 38 TC 1 Z9 1 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-1280 J9 THEOCHEM-J MOL STRUC JI Theochem-J. Mol. Struct. PD MAR 24 PY 1992 VL 87 BP 297 EP 308 PG 12 WC Chemistry, Physical SC Chemistry GA HM949 UT WOS:A1992HM94900017 ER PT J AU KOIKE, J PARKIN, DM MITCHELL, TE AF KOIKE, J PARKIN, DM MITCHELL, TE TI DISPLACEMENT THRESHOLD ENERGY FOR TYPE-IIA DIAMOND SO APPLIED PHYSICS LETTERS LA English DT Article AB A type IIa natural diamond was irradiated at room temperature with energetic electrons. The threshold energy for displacement of atoms from their lattice sites was determined for three principal crystallographic directions by observing the formation of defect clusters during irradiation in a transmission electron microscope. The displacement-threshold energies were found to be 37.5 +/- 1.2 eV for the electron incident in the [100] direction, 45.0 +/- 1.3 eV in the [111] direction, and 47.6 +/- 1.3 eV in the [110] direction. C1 UNIV CALIF LOS ALAMOS SCI LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. NR 19 TC 114 Z9 116 U1 0 U2 8 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 23 PY 1992 VL 60 IS 12 BP 1450 EP 1452 DI 10.1063/1.107267 PG 3 WC Physics, Applied SC Physics GA HK373 UT WOS:A1992HK37300014 ER PT J AU GEHRING, K BAO, K NIKAIDO, H AF GEHRING, K BAO, K NIKAIDO, H TI UV DIFFERENCE SPECTROSCOPY OF LIGAND-BINDING TO MALTOSE-BINDING PROTEIN SO FEBS LETTERS LA English DT Article DE MALTOSE; MALTODEXTRIN; UV DIFFERENCE SPECTROSCOPY; ANOMER SPECIFICITY; PERIPLASMIC BINDING PROTEIN ID ESCHERICHIA-COLI; TRANSPORT-SYSTEM; FLUORESCENCE; TRYPTOPHAN; CHEMOTAXIS; COMPONENT; RECEPTOR AB We have used UV absorbance spectroscopy to study the binding of linear and circular maltodextrins to maltose-binding protein (MBP). Titrations with maltose yield three isosbestic points in the difference spectrum of MBP, consistent with two protein conformations: ligand-free and ligand-bound. In contrast, titrations with maltotetraose reveal three conformations: ligand-free, a low-affinity liganded state, and a high affinity liganded state. These results confirm and extend the results from tritium NMR spectroscopy, namely, that MBP can bind maltodextrin either by the sugar's anomeric end (high affinity) or by the middle of the maltodextrin chain (low affinity). C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DEPT CELL & MOLEC BIOL,MACROMOLEC STRUCT GRP,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT MOLEC & CELL BIOL,BERKELEY,CA 94720. RP GEHRING, K (reprint author), ECOLE POLYTECH,BIOPHYS GRP,F-91128 PALAISEAU,FRANCE. RI Gehring, Kalle/I-4403-2013 OI Gehring, Kalle/0000-0001-6500-1184 FU NCRR NIH HHS [RR05918]; NIAID NIH HHS [AI-09644]; NIGMS NIH HHS [GM36884] NR 23 TC 9 Z9 9 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0014-5793 J9 FEBS LETT JI FEBS Lett. PD MAR 23 PY 1992 VL 300 IS 1 BP 33 EP 38 DI 10.1016/0014-5793(92)80159-E PG 6 WC Biochemistry & Molecular Biology; Biophysics; Cell Biology SC Biochemistry & Molecular Biology; Biophysics; Cell Biology GA HK982 UT WOS:A1992HK98200009 PM 1547886 ER PT J AU NAGY, Z CURTISS, LA HUNG, NC ZURAWSKI, DJ YONCO, RM AF NAGY, Z CURTISS, LA HUNG, NC ZURAWSKI, DJ YONCO, RM TI CATALYTIC EFFECT OF UNDER-POTENTIAL DEPOSITED LAYERS ON THE FERROUS FERRIC OUTER-SPHERE ELECTRODE-REACTION SO JOURNAL OF ELECTROANALYTICAL CHEMISTRY LA English DT Article ID EFFECTIVE CORE POTENTIALS; FOREIGN METAL ADATOMS; MOLECULAR CALCULATIONS; ELECTROCATALYTIC PROPERTIES; CHLORIDE-IONS; KINETICS; ABINITIO; ADSORPTION; COMPLEXES; ATOMS AB The influence of the electrode metal on the kinetics of outer-sphere redox reactions is still an unsettled question with contradictory results being reported in the literature. Some theoretical and experimental results indicate the complete absence of an effect, while there is also experimental evidence that underpotential deposited (UPD) metal layers can influence the rate of outer-sphere redox reactions. Furthermore, it has been suggested that some of the reported catalytic effect may be experimental artifacts caused by anion adsorption on the electrodes. We have carried out a coupled experimental/theoretical investigation of the effect of UPD-metal layers on the rate of the Fe2+/Fe3+ redox reaction on polycrystalline gold and platinum electrodes in perchloric acid solutions rigorously purified to remove catalytic anions (e.g., chloride ions), with copper, silver, and bismuth UPD layers. Our experimental results indicate clearly that the catalytic effect of UPD-metal layers on outer-sphere redox reactions cannot be explained generally by anion adsorption, since the phenomenon persisted in rigorously purified solutions. We also suggest a possible theoretical explanation of this phenomenon. In a recent study, we found the Fe2+/Fe3+ heterogeneous electron transfer at a gold surface to be non-adiabatic, i.e. electronic coupling contributed significantly to the rate. In the work reported here we have investigated, by means of electronic structure calculations, whether the catalytic effect observed for this reaction at a gold electrode with a UPD-copper monolayer may be due to changes in electronic coupling. We have found that, while the nature of the electronic coupling remains unchanged by the UPD-copper layer, the observed catalytic effect may still be due to a larger electronic coupling because the hydrated ion approaches closer to the UPD-layer-covered surface than the bare surface, thus increasing the electronic coupling and the rate of the reaction. C1 ARGONNE NATL LAB,DIV CHEM TECHNOL,ARGONNE,IL 60439. WHEATON COLL,DEPT CHEM,WHEATON,IL 60187. RP NAGY, Z (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 33 TC 16 Z9 16 U1 1 U2 8 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0022-0728 J9 J ELECTROANAL CHEM JI J. Electroanal. Chem. PD MAR 23 PY 1992 VL 325 IS 1-2 BP 313 EP 324 DI 10.1016/0022-0728(92)80121-J PG 12 WC Chemistry, Analytical; Electrochemistry SC Chemistry; Electrochemistry GA JB272 UT WOS:A1992JB27200023 ER PT J AU MCGOWAN, FK JOHNSON, NR BAKTASH, C LEE, IY SCHUTZ, Y WELLS, JC LARABEE, A AF MCGOWAN, FK JOHNSON, NR BAKTASH, C LEE, IY SCHUTZ, Y WELLS, JC LARABEE, A TI TRANSITION QUADRUPOLE-MOMENTS OF HIGH-SPIN STATES IN YB-162,YB-163 SO NUCLEAR PHYSICS A LA English DT Article DE CD-116(TI-50,XN)YB-166-X, E = 215 MEV; MEASURED BETA-SPECTRA, MEASURED LIFETIMES OF STATES BY DOPPLER-SHIFT RECOIL-DISTANCE METHOD; YB-162 DEDUCED QT VALUES IN YRAST AND NEGATIVE-PARITY BANDS, B(E1), B(M1); YB-163 DEDUCED QT VALUES IN I13/2 BAND; YB-162; CRANKED-HFB CALCULATIONS, DEFORMATION PARAMETERS BETA-2, BETA-4, GAMMA ID SHELL-MODEL DICTIONARY; RARE-EARTH NUCLEI; OCTUPOLE DEFORMATION; QUASIPARTICLE LEVELS; YRAST; COLLECTIVITY; SPECTROSCOPY; SYSTEMATICS; ROTATION; YB-160 AB Lifetimes of states in 162Yb, 163Yb have been measured by the Doppler-shift recoil-distance method using the reaction Cd-116(Ti-50, xn) 166-xYb at 215 MeV. The data were collected in coincidence with a total-energy filter to provide some discrimination on reaction channel. The experimental transition quadrupole moments, Q(t), do not agree in detail with predictions from cranked Hartree-Fock-Bogoliubov (HFB) calculations for the yrast band of 162Yb. In particular, the loss of collectivity occurs at much lower angular momentum than predicted by the calculations. These discrepancies are not understood in state of the art calculations of the nuclear shape. The interaction strength V between the g- and the s-band extracted from the data is very small (\V\ congruent-to 1 keV). The E1/E2 branching ratios and E1 transition probabilities for decay of states at low spins in the (-, 1) band are large (B(E1) = 10(-3) B(E1)sp). The origin of these effects suggests that the (-, 1) band at low frequencies in 162Yb is predominately an octupole band. Although no stable octupole deformation has been predicted in this mass region, the experimental evidence points to some octupole instability for 162Yb. C1 TENNESSEE TECHNOL UNIV,COOKEVILLE,TN 38505. UNIV TENNESSEE,KNOXVILLE,TN 37916. RP MCGOWAN, FK (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 37 TC 19 Z9 19 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD MAR 23 PY 1992 VL 539 IS 2 BP 276 EP 294 DI 10.1016/0375-9474(92)90271-K PG 19 WC Physics, Nuclear SC Physics GA HK468 UT WOS:A1992HK46800006 ER PT J AU CRESCIMANNO, M HOTES, SA AF CRESCIMANNO, M HOTES, SA TI MONOPOLES, MODULAR INVARIANCE AND CHERN-SIMONS FIELD-THEORY SO NUCLEAR PHYSICS B LA English DT Article ID GAUGE-FIELDS; 2 DIMENSIONS; FUSION RULES; WORLD SHEET; QUANTIZATION; ALGEBRAS; STRINGS; MODELS AB We develop an operator construction of Chern-Simons effective quantum mechanics. A correspondence between the resulting Hilbert space and the conformal blocks of the WZW model is made. Under this identification the fusion algebra is derived. Some properties of the modular transformations in higher genus of rational conformal field theories are understood by including monopole backgrounds to the theory at genus one. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 30 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD MAR 23 PY 1992 VL 372 IS 3 BP 683 EP 700 DI 10.1016/0550-3213(92)90371-H PG 18 WC Physics, Particles & Fields SC Physics GA HM895 UT WOS:A1992HM89500007 ER PT J AU CHAU, LL YAMANAKA, I AF CHAU, LL YAMANAKA, I TI CANONICAL FORMULATION OF THE SELF-DUAL YANG-MILLS SYSTEM - ALGEBRAS AND HIERARCHIES SO PHYSICAL REVIEW LETTERS LA English DT Article ID 4-DIMENSIONAL EUCLIDEAN-SPACE; SUPERSYMMETRIC GAUGE-THEORIES; QUANTUM-FIELD-THEORY; LAGRANGIAN THEORY; MODULI SPACES; EQUATIONS; CONSTRAINTS; TOPOLOGY; MOTION AB We construct a canonical formulation of the self-dual Yang-Mills system formulated in the gauge-invariant group-valued J fields and derive their Hamiltonian and the quadratic algebras of the fundamental Dirac brackets. We also show that the quadratic algebras satisfy Jacobi identities and their structure matrices satisfy modified Yang-Baxter equations. From these quadratic algebras, we construct Kac-Moody-like and Virasoro-like algebras. We also discuss their related symmetries, involutive conserved quantities, and hierarchies of nonlinear and linear equations. C1 UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP CHAU, LL (reprint author), UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616, USA. NR 38 TC 15 Z9 15 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 23 PY 1992 VL 68 IS 12 BP 1807 EP 1810 DI 10.1103/PhysRevLett.68.1807 PG 4 WC Physics, Multidisciplinary SC Physics GA HK319 UT WOS:A1992HK31900006 ER PT J AU GAVIN, S MILANA, J AF GAVIN, S MILANA, J TI ENERGY-LOSS AT LARGE XF IN NUCLEAR COLLISIONS SO PHYSICAL REVIEW LETTERS LA English DT Article ID J-PSI PRODUCTION; QCD; DEPENDENCE; ENHANCEMENT; SCATTERING; GLUON; J/PSI AB Measurements of the Drell-Yan process and of charmonium and bottomonium production at CERN and Fermilab show a depletion at high Feynman x in large relative to small nuclear targets. We can attribute this depletion to energy loss of initial and final states, provided that the loss is (dE/dz)Drell-Yan = 4/9 (dE/dz)charm approximately 1.5 GeV/fm at the highest x(F) measured. This small loss is magnified in the differential cross section due to the strong behavior approximately (1 - x)n of the projectile's structure functions at large x. C1 COLL WILLIAM & MARY, DEPT PHYS, WILLIAMSBURG, VA 23185 USA. RP BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA. NR 29 TC 93 Z9 94 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 MAR 23 PY 1992 VL 68 IS 12 BP 1834 EP 1837 DI 10.1103/PhysRevLett.68.1834 PG 4 WC Physics, Multidisciplinary SC Physics GA HK319 UT WOS:A1992HK31900013 ER PT J AU SATOGATA, T CHEN, T COLE, B FINLEY, D GERASIMOV, A GODERRE, G HARRISON, M JOHNSON, R KOURBANIS, I MANZ, C MERMINGA, N MICHELOTTI, L PEGGS, S PILAT, F PRUSS, S SALTMARSH, C SARITEPE, S TALMAN, R TRAHERN, CG TSIRONIS, G AF SATOGATA, T CHEN, T COLE, B FINLEY, D GERASIMOV, A GODERRE, G HARRISON, M JOHNSON, R KOURBANIS, I MANZ, C MERMINGA, N MICHELOTTI, L PEGGS, S PILAT, F PRUSS, S SALTMARSH, C SARITEPE, S TALMAN, R TRAHERN, CG TSIRONIS, G TI DRIVEN RESPONSE OF A TRAPPED-PARTICLE BEAM SO PHYSICAL REVIEW LETTERS LA English DT Article AB The dynamics of a metastable beam of particles "injected" into artificially excited resonance islands in the Fermilab Tevatron is studied. Evolution of the captured beam distribution is measured by an externally detectable coherent signal. Dynamical partitions observed in the control space of amplitude and tune of a focusing modulation are consistent with an equivalent model of an ensemble of driven gravity pendula. The model's single parameter, the island tune Q1 of small oscillations, is inferred as the central frequency of resonant detrapping under this weak drive. C1 CORNELL UNIV,NEWMAN LAB NUCL STUDIES,ITHACA,NY 14853. SSC LAB,DALLAS,TX 75237. BROOKHAVEN NATL LAB,UPTON,NY 11973. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305. UNIV N TEXAS,DEPT PHYS,DENTON,TX 76203. RP SATOGATA, T (reprint author), FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510, USA. RI Tsironis, George/C-2683-2011; OI Johnson, Rolland/0000-0001-7205-1913 NR 8 TC 17 Z9 17 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 23 PY 1992 VL 68 IS 12 BP 1838 EP 1841 DI 10.1103/PhysRevLett.68.1838 PG 4 WC Physics, Multidisciplinary SC Physics GA HK319 UT WOS:A1992HK31900014 ER PT J AU LE, LP LUKE, GM STERNLIEB, BJ WU, WD UEMURA, YJ BREWER, JH RISEMAN, TM STRONACH, CE SAITO, G YAMOCHI, H WANG, HH KINI, AM CARLSON, KD WILLIAMS, JM AF LE, LP LUKE, GM STERNLIEB, BJ WU, WD UEMURA, YJ BREWER, JH RISEMAN, TM STRONACH, CE SAITO, G YAMOCHI, H WANG, HH KINI, AM CARLSON, KD WILLIAMS, JM TI MUON-SPIN-RELAXATION MEASUREMENTS OF MAGNETIC PENETRATION DEPTH IN ORGANIC SUPERCONDUCTORS (BEDT-TTF)2-X - X=CU(NCS)2 AND CU[N(CN)2]BR SO PHYSICAL REVIEW LETTERS LA English DT Article ID ROTATION EXPERIMENTS; TEMPERATURE; TC; KAPPA-(BEDT-TTF)2CU(NCS)2; SYSTEMS; FIELDS; UBE13; STATE AB The magnetic-field penetration depth-lambda in the organic superconductors kappa-(BEDT-TTF)2Cu(NCS)2 and kappa-(BEDT-TTF)2Cu[N(CN)2]Br has been measured over a wide temperature region 20 mK less-than-or-equal-to T less-than-or-equal-to 15 K via the muon-spin-relaxation technique. Linear variation of lambda with T at low temperatures, found in both systems, is consistent with anisotropic superconducting pairings with line nodes in the energy gap. In the latter compound, we observe flux depinning at T approximately 5 K, well below T(c) = 12 K. C1 UNIV BRITISH COLUMBIA,DEPT PHYS,VANCOUVER V6T 2A3,BC,CANADA. VIRGINIA STATE COLL,DEPT PHYS,PETERSBURG,VA 23803. KYOTO UNIV,DEPT CHEM,KYOTO 606,JAPAN. ARGONNE NATL LAB,DIV CHEM & MAT SCI,ARGONNE,IL 60439. RP LE, LP (reprint author), COLUMBIA UNIV,DEPT PHYS,NEW YORK,NY 10027, USA. RI Kini, Aravinda/F-4467-2012; Luke, Graeme/A-9094-2010; OI Luke, Graeme/0000-0003-4762-1173; Brewer, Jesse H./0000-0002-8211-1235 NR 30 TC 121 Z9 121 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 MAR 23 PY 1992 VL 68 IS 12 BP 1923 EP 1926 DI 10.1103/PhysRevLett.68.1923 PG 4 WC Physics, Multidisciplinary SC Physics GA HK319 UT WOS:A1992HK31900036 ER PT J AU KIM, B ANDREWS, AB ERSKINE, JL KIM, KJ HARMON, BN AF KIM, B ANDREWS, AB ERSKINE, JL KIM, KJ HARMON, BN TI TEMPERATURE-DEPENDENT CONDUCTION-BAND EXCHANGE SPLITTING IN FERROMAGNETIC HCP GADOLINIUM - THEORETICAL PREDICTIONS AND PHOTOEMISSION EXPERIMENTS SO PHYSICAL REVIEW LETTERS LA English DT Article ID ITINERANT FERROMAGNETISM; RESOLVED PHOTOEMISSION; CURIE-TEMPERATURE; MAGNETIC ORDER; ENERGY-BANDS; GD(0001); SURFACE; NI; SYSTEMS; METALS AB Angle-resolved photoemission is used to determine the temperature-dependent electronic properties of ferromagnetic bulk Gd along GAMMA-A of the three-dimensional Brillouin zone. The DELTA-2 band exchange splitting (0.85 eV) and dispersion (0.5 eV) are in reasonably good agreement with self-consistent local spin-density approximation calculations. The conduction-band magnetic exchange splitting vanishes at the Curie temperature following a conventional power law with a Heisenberg critical exponent. This "Stoner model" collapse of the exchange splitting is in striking contrast to corresponding results observed in transition-metal ferromagnets. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. RP KIM, B (reprint author), UNIV TEXAS,DEPT PHYS,AUSTIN,TX 78712, USA. NR 37 TC 108 Z9 108 U1 2 U2 8 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 MAR 23 PY 1992 VL 68 IS 12 BP 1931 EP 1934 DI 10.1103/PhysRevLett.68.1931 PG 4 WC Physics, Multidisciplinary SC Physics GA HK319 UT WOS:A1992HK31900038 ER PT J AU LU, ZW WEI, SH ZUNGER, A AF LU, ZW WEI, SH ZUNGER, A TI ORIGINS OF COMPOSITIONAL ORDER IN NIPT ALLOYS - COMMENT SO PHYSICAL REVIEW LETTERS LA English DT Letter RP LU, ZW (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. NR 4 TC 21 Z9 21 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 MAR 23 PY 1992 VL 68 IS 12 BP 1961 EP 1961 DI 10.1103/PhysRevLett.68.1961 PG 1 WC Physics, Multidisciplinary SC Physics GA HK319 UT WOS:A1992HK31900047 ER PT J AU PINSKI, FJ GINATEMPO, B JOHNSON, DD STAUNTON, JB STOCKS, GM GYORFFY, BL AF PINSKI, FJ GINATEMPO, B JOHNSON, DD STAUNTON, JB STOCKS, GM GYORFFY, BL TI COMMENT ON ORIGINS OF COMPOSITIONAL ORDER IN NIPT ALLOYS - REPLY SO PHYSICAL REVIEW LETTERS LA English DT Letter C1 UNIV MESSINA,IST FIS TEORICA,I-98166 MESSINA,ITALY. SANDIA NATL LABS,DIV THEORET,LIVERMORE,CA 94550. UNIV WARWICK,DEPT PHYS,COVENTRY CV4 7AL,W MIDLANDS,ENGLAND. OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. UNIV BRISTOL,HH WILLS PHYS LAB,BRISTOL BS8 1TL,AVON,ENGLAND. UNIV MESSINA,CTR INTERUNIV STRUTTURA MAT,UNITA GRP NAZL STRUTTURA MAT,I-98166 MESSINA,ITALY. RP PINSKI, FJ (reprint author), UNIV CINCINNATI,DEPT PHYS,CINCINNATI,OH 45212, USA. RI Stocks, George Malcollm/Q-1251-2016 OI Stocks, George Malcollm/0000-0002-9013-260X NR 5 TC 12 Z9 12 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 MAR 23 PY 1992 VL 68 IS 12 BP 1962 EP 1962 DI 10.1103/PhysRevLett.68.1962 PG 1 WC Physics, Multidisciplinary SC Physics GA HK319 UT WOS:A1992HK31900048 ER PT J AU CREAGH, SC LITTLEJOHN, RG AF CREAGH, SC LITTLEJOHN, RG TI SEMICLASSICAL TRACE FORMULAS FOR SYSTEMS WITH NON-ABELIAN SYMMETRY SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article ID PERIODIC-ORBITS; QUANTUM SPECTRA; BOUND SPECTRUM; WAVE-EQUATION; FINITE DOMAIN; EIGENFREQUENCIES; QUANTIZATION; TERMS AB We derive generalizations of the trace formula of Gutzwiller and Balian and Bloch that are valid in the presence of a non-Abelian continuous symmetry. The usual trace formula must be modified in such cases because periodic orbits occur in continuous families, whereas the usual trace formula requires that the periodic orbits be isolated at a given energy. These calculations extend the results of a previous paper, in which we considered Abelian continuous symmetries. The most important application of the results of this paper is to systems with full three-dimensional rotational symmetry, and we give this case special consideration. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. NR 28 TC 63 Z9 63 U1 1 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD MAR 21 PY 1992 VL 25 IS 6 BP 1643 EP 1669 DI 10.1088/0305-4470/25/6/021 PG 27 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA HK799 UT WOS:A1992HK79900021 ER PT J AU OLSSON, WA AF OLSSON, WA TI THE EFFECT OF SLIP ON THE FLOW OF FLUID THROUGH A FRACTURE SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID ROCK FRACTURE; STRESS AB To measure the changes in fluid volume flow rates through an artificial fracture undergoing slip, silicone oil was pumped through a sawcut in welded tuff in the radial flow geometry during rotary shear. The flow rates at constant normal stress and constant fluid pressure gradient were measured at different amounts of fracture slip. The fluid volume flow rate for a smooth fracture increases at first then decreases with ongoing slip. For a rougher fracture the flow rate decreases over the whole range of slip. The results have implications for fluid withdrawal from reservoirs and underground waste disposal. RP OLSSON, WA (reprint author), SANDIA NATL LABS,DIV 6232,ALBUQUERQUE,NM 87185, USA. NR 14 TC 7 Z9 7 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD MAR 20 PY 1992 VL 19 IS 6 BP 541 EP 543 DI 10.1029/92GL00197 PG 3 WC Geosciences, Multidisciplinary SC Geology GA HK981 UT WOS:A1992HK98100005 ER PT J AU LEE, TT YEUNG, ES AF LEE, TT YEUNG, ES TI HIGH-SENSITIVITY LASER-INDUCED FLUORESCENCE DETECTION OF NATIVE PROTEINS IN CAPILLARY ELECTROPHORESIS SO JOURNAL OF CHROMATOGRAPHY LA English DT Article ID ZONE ELECTROPHORESIS; SEQUENCE AB A highly sensitive laser-induced (LIF) detection scheme for native, tryptophan- or tyosine-containing proteins in capillary electrophoresis (CE) has been demonstrated. The 275.4 nm line from an argon-ion laser is used to excite native protein fluorescence. A limit of detection (LOD) (S/N = 2) of 1 . 10(-10) M for conalbumin represents a 140-fold improvement over earlier reports. With stacking at injection, the LOD is 3 . 10(-12) M. Linear dynamic ranges of at least 5 and 4 orders of magnitude for, respectively, tryptophan and bovine serum albumin are found. The practical performance and blueprint of an easily constructed, rugged, compact and user-friendly LIF detector for CE are shown. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. NR 28 TC 160 Z9 161 U1 0 U2 21 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR PD MAR 20 PY 1992 VL 595 IS 1-2 BP 319 EP 325 DI 10.1016/0021-9673(92)85174-R PG 7 WC Chemistry, Analytical SC Chemistry GA HM930 UT WOS:A1992HM93000031 PM 1577911 ER PT J AU LAGOMARSINO, RJ LATNER, N AF LAGOMARSINO, RJ LATNER, N TI WIDE DYNAMIC-RANGE ELECTRON-CAPTURE DETECTION USING THE ELECTRON-CAPTURE DETECTOR PULSE FREQUENCY SIGNAL SO JOURNAL OF CHROMATOGRAPHY LA English DT Note AB A method has been developed that extends the dynamic range of the Varian constant-current, pulse-modulated detector by employing pulse frequency as the chromatographic output signal. A description of the technique of acquiring and utilizing the pulse frequency signal for gas chromatography-electron capture detection analysis is presented. Application of the system for the measurement of perfluorocarbon tracer compounds in ambient air samples is demonstrated. RP LAGOMARSINO, RJ (reprint author), US DOE,ENVIRONM MEASUREMENTS LAB,376 HUDSON ST,NEW YORK,NY 10014, USA. NR 14 TC 7 Z9 7 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR PD MAR 20 PY 1992 VL 595 IS 1-2 BP 359 EP 363 DI 10.1016/0021-9673(92)85182-S PG 5 WC Chemistry, Analytical SC Chemistry GA HM930 UT WOS:A1992HM93000039 ER PT J AU RANDALL, DA CESS, RD BLANCHET, JP BOER, GJ DAZLICH, DA DELGENIO, AD DEQUE, M DYMNIKOV, V GALIN, V GHAN, SJ LACIS, AA LETREUT, H LI, ZX LIANG, XZ MCAVANEY, BJ MELESHKO, VP MITCHELL, JFB MORCRETTE, JJ POTTER, GL RIKUS, L ROECKNER, E ROYER, JF SCHLESE, U SHEININ, DA SLINGO, J SOKOLOV, AP TAYLOR, KE WASHINGTON, WM WETHERALD, RT YAGAI, I ZHANG, MH AF RANDALL, DA CESS, RD BLANCHET, JP BOER, GJ DAZLICH, DA DELGENIO, AD DEQUE, M DYMNIKOV, V GALIN, V GHAN, SJ LACIS, AA LETREUT, H LI, ZX LIANG, XZ MCAVANEY, BJ MELESHKO, VP MITCHELL, JFB MORCRETTE, JJ POTTER, GL RIKUS, L ROECKNER, E ROYER, JF SCHLESE, U SHEININ, DA SLINGO, J SOKOLOV, AP TAYLOR, KE WASHINGTON, WM WETHERALD, RT YAGAI, I ZHANG, MH TI INTERCOMPARISON AND INTERPRETATION OF SURFACE-ENERGY FLUXES IN ATMOSPHERIC GENERAL-CIRCULATION MODELS SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID CLIMATE FEEDBACK; CLOUD AB We have analyzed responses of the surface energy budgets and hydrologic cycles of 19 atmospheric general circulation models to an imposed, globally uniform sea surface temperature perturbation of 4 K. The responses of the simulated surface energy budgets are extremely diverse and are closely linked to the responses of the simulated hydrologic cycles. The response of the net surface energy flux is not controlled by cloud effects; instead, it is determined primarily by the response of the latent heat flux. The prescribed warming of the oceans leads to major increases in the atmospheric water vapor content and the rates of evaporation and precipitation. The increased water vapor amount drastically increases the downwelling infrared radiation at the Earth's surface, but the amount of the change varies dramatically from one model to another. C1 DEPT ENVIRONM, CANADIAN CLIMATE CTR, ATMOSPHER ENVIRONM SERV, 4905 DUFFERIN ST, TORONTO M3H 5T4, ONTARIO, CANADA. COLORADO STATE UNIV, DEPT ATMOSPHER SCI, FT COLLINS, CO 80523 USA. SUNY STONY BROOK, INST TERR & PLANETARY ATMOSPHERES, STONY BROOK, NY 11794 USA. NASA, GODDARD INST SPACE STUDIES, NEW YORK, NY 10025 USA. CTR NATL RECH METEOROL, DIRECT METEOROL, TOULOUSE, FRANCE. ACAD SCI USSR, DEPT NUMER MATH, MOSCOW V-71, USSR. UNIV CALIF LAWRENCE LIVERMORE NATL LAB, PROGRAM CLIMATE MODEL DIAG & INTERCOMPARISON, LIVERMORE, CA 94550 USA. LAB METEOROL DYNAM, PARIS, FRANCE. SUNY STONY BROOK, DEPT MECH ENGN, STONY BROOK, NY 11794 USA. BUR METEOROL RES CTR, MELBOURNE, VIC, AUSTRALIA. VOEIKOV MAIN GEOPHYS OBSERV, ST PETERSBURG, USSR. METEOROL OFF, BRACKNELL, BERKS, ENGLAND. EUROPEAN CTR MEDIUM RANGE WEATHER FORECASTS, READING, BERKS, ENGLAND. PRINCETON UNIV, NOAA, GEOPHYS FLUID DYNAM LAB, PRINCETON, NJ 08544 USA. METEOROL RES INST, IBARAKI, JAPAN. UNIV HAMBURG, INST METEOROL, W-2000 HAMBURG 13, GERMANY. UNIV READING, DEPT METEOROL, READING RG6 2AH, BERKS, ENGLAND. NATL CTR ATMOSPHER RES, DIV CLIMATE & GLOBAL DYNAM, BOULDER, CO 80307 USA. RI Taylor, Karl/F-7290-2011; Del Genio, Anthony/D-4663-2012; Lacis, Andrew/D-4658-2012; Randall, David/E-6113-2011; Meleshko, Valentin/D-2157-2016; Ghan, Steven/H-4301-2011; OI Taylor, Karl/0000-0002-6491-2135; Del Genio, Anthony/0000-0001-7450-1359; Randall, David/0000-0001-6935-4112; Ghan, Steven/0000-0001-8355-8699; Li, Laurent/0000-0002-3855-3976 NR 23 TC 79 Z9 79 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 MAR 20 PY 1992 VL 97 IS D4 BP 3711 EP 3724 PG 14 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA HK021 UT WOS:A1992HK02100002 ER PT J AU GALE, JM TOBEY, RA DANNA, JA AF GALE, JM TOBEY, RA DANNA, JA TI LOCALIZATION AND DNA-SEQUENCE OF A REPLICATION ORIGIN IN THE RHODOPSIN GENE LOCUS OF CHINESE-HAMSTER CELLS SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE REPLICATION; SEQUENCE; ORIGINS; DNA; CHINESE HAMSTER OVARY CELLS ID DIHYDROFOLATE-REDUCTASE DOMAIN; EARLY S-PHASE; C-MYC GENE; BINDING PROTEINS; CHO CELLS; AUTONOMOUS REPLICATION; EUKARYOTIC DNA; ARS ELEMENTS; YEAST; SITES C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV LIFE SCI,POB 1663 MS-M880,LOS ALAMOS,NM 87545. NR 65 TC 72 Z9 73 U1 0 U2 0 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD MAR 20 PY 1992 VL 224 IS 2 BP 343 EP 358 DI 10.1016/0022-2836(92)90999-Z PG 16 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA HL812 UT WOS:A1992HL81200006 PM 1560457 ER PT J AU MOCK, JE AF MOCK, JE TI GEOTHERMAL-ENERGY FUTURE SO SCIENCE LA English DT Letter RP MOCK, JE (reprint author), US DOE,DIV GEOTHERMAL,WASHINGTON,DC 20585, USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD MAR 20 PY 1992 VL 255 IS 5051 BP 1490 EP 1490 DI 10.1126/science.255.5051.1490 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HJ809 UT WOS:A1992HJ80900002 PM 17820144 ER PT J AU BUSMAN, M ROCKWOOD, AL SMITH, RD AF BUSMAN, M ROCKWOOD, AL SMITH, RD TI ACTIVATION-ENERGIES FOR GAS-PHASE DISSOCIATIONS OF MULTIPLY CHARGED IONS FROM ELECTROSPRAY IONIZATION MASS-SPECTROMETRY SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Letter ID INTERNAL ENERGY; CYTOCHROME-C; BIOMOLECULES; PROTEINS AB The reactions of multiply protonated melittin molecular ions of various charge states produced from an electrospray ionization source have been studied. The flow of ions entrained in gas through a heated metal capillary inlet serves as a reaction vessel for gas-phase measurements of molecular ion reaction rates using mass spectrometry. Activation energies for the unimolecular dissociation reactions are calculated from the temperature dependence of the reaction kinetics. The differences in activation energies for the reactions of the different charge states are attributed to the destabilizing effect of Coulombic repulsion for highly charged ions. C1 PACIFIC NW LAB, DEPT CHEM SCI, RICHLAND, WA 99352 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 18 TC 63 Z9 63 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 19 PY 1992 VL 96 IS 6 BP 2397 EP 2400 DI 10.1021/j100185a001 PG 4 WC Chemistry, Physical SC Chemistry GA HK717 UT WOS:A1992HK71700001 ER PT J AU RAGHAVACHARI, K ROHLFING, CM AF RAGHAVACHARI, K ROHLFING, CM TI IMPERFECT FULLERENE STRUCTURES - ISOMERS OF C-60 SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID CARBON CLUSTERS; ELECTRONIC-STRUCTURE; ICOSAHEDRAL C-60; BUCKMINSTERFULLERENE; MOLECULES; REHYBRIDIZATION; STABILITY; SYSTEMS; CAGES AB The structures and energies of several alternative isomeric structures of C60 spheroids have been computed with semiempirical (MNDO) and ab initio Hartree-Fock molecular orbital techniques. Unlike the ideal icosahedral structure, these isomers are characterized by the presence of two or more pairs of adjacent pentagonal rings. The energy contributions of these adjacent pentagonal defects are roughly additive, with each defect making the structure less stable by congruent-to 1 eV. The lowest energy alternative isomer of C60 has C2-upsilon symmetry and lies congruent-to 2 eV higher in energy than the icosahedral ground-state structure. C1 SANDIA NATL LABS,LIVERMORE,CA 94550. RP RAGHAVACHARI, K (reprint author), AT&T BELL LABS,MURRAY HILL,NJ 07974, USA. NR 22 TC 60 Z9 60 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 19 PY 1992 VL 96 IS 6 BP 2463 EP 2466 DI 10.1021/j100185a014 PG 4 WC Chemistry, Physical SC Chemistry GA HK717 UT WOS:A1992HK71700014 ER PT J AU SUMPTER, BG GETINO, C NOID, DW AF SUMPTER, BG GETINO, C NOID, DW TI NEURAL NETWORK PREDICTIONS OF ENERGY-TRANSFER IN MACROMOLECULES SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID UNIMOLECULAR REACTIONS; DYNAMICS AB A neural network is trained to predict the dynamical behavior of internal energy in macromolecules. Energy flow out of localized sites within a polyethylene chain is studied as a function of time, excitation level, and temperature. Computations were examined for CH stretch excitation levels between upsilon = 2 and 14, temperatures between T = 20 and 350 K, and time from 0 to 200 ps. The results show that the neural network predictions are accurate to within 8% error of those calculated from molecular dynamics. This difference is related to statistical fluctuations in the molecular dynamics calculations which result from small ensemble averages. In fact, the neural network acts to "filter out" those fluctuations, providing results which are more concordant with the limit of a very large ensemble average. In addition to this desirable property, the trained network can predict energy flow behavior for any reasonable excitation level, temperature (energies must be bound), and time scale, thereby significantly extending the computational limits of the molecular dynamics method. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. RP SUMPTER, BG (reprint author), OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831, USA. RI Sumpter, Bobby/C-9459-2013 OI Sumpter, Bobby/0000-0001-6341-0355 NR 25 TC 14 Z9 14 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 19 PY 1992 VL 96 IS 6 BP 2761 EP 2767 DI 10.1021/j100185a066 PG 7 WC Chemistry, Physical SC Chemistry GA HK717 UT WOS:A1992HK71700066 ER PT J AU LAFEMINA, JP CARTER, DR BASS, MB AF LAFEMINA, JP CARTER, DR BASS, MB TI PHOTOPHYSICAL PROPERTIES, INTERMOLECULAR INTERACTIONS, AND MOLECULAR-DYNAMICS OF POLY(ETHYLENE-TEREPHTHALATE) SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID ELECTRONIC-STRUCTURE; POLY(ETHYLENE-TEREPHTHALATE) FILMS; POLYETHYLENE TEREPHTHALATE; FLUORESCENCE; SPECTROSCOPY; POLYIMIDE; ORIENTATION; ABSORPTION; POLYMERS; IRRADIATION AB Classical molecular dynamics simulations and quantum-mechanical computations (using the spectroscopically parameterized CNDO/S3 model) are performed to characterize the dynamic structure, intermolecular interactions, and photophysical properties of poly(ethylene terephthalate). These studies indicate that the 368- and 534-nm emissions-unexplainable in terms of single-strand monomeric properties-do not arise as a result of interactions between polymer strands in their crystalline orientation but must originate in the amorphous regions of the polymer films. RP LAFEMINA, JP (reprint author), PACIFIC NW LAB, MOLEC SCI RES CTR, POB 999, RICHLAND, WA 99352 USA. NR 58 TC 6 Z9 6 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 19 PY 1992 VL 96 IS 6 BP 2767 EP 2772 DI 10.1021/j100185a067 PG 6 WC Chemistry, Physical SC Chemistry GA HK717 UT WOS:A1992HK71700067 ER PT J AU HOUSTON, JE MICHALSKE, TA AF HOUSTON, JE MICHALSKE, TA TI THE INTERFACIAL-FORCE MICROSCOPE SO NATURE LA English DT Article RP HOUSTON, JE (reprint author), SANDIA NATL LABS,DIV SURFACE SCI 1114,ALBUQUERQUE,NM 87185, USA. NR 9 TC 62 Z9 62 U1 0 U2 7 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD MAR 19 PY 1992 VL 356 IS 6366 BP 266 EP 267 DI 10.1038/356266a0 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HJ944 UT WOS:A1992HJ94400068 ER PT J AU KAHANA, SH RIPKA, G AF KAHANA, SH RIPKA, G TI STABILIZING THE VACUUM IN THE GAUGED CHIRAL SIGMA-MODEL SO PHYSICS LETTERS B LA English DT Article ID FIELD-THEORIES; INSTABILITY; QUARKS AB The introduction of vector mesons as fundamental fields coupling to quarks can remove vacuum instabilities in a purely quark-scalar meson theory used to describe low and intermediate energy hadron physics. The requirement that there be no Landau ghost in the quark-scalar meson sector translates into an interesting restriction on the constituent quark mass, or in the case of a meson-nucleon theory on the nucleon mass. If these coupling constant constraints are satisfied the quark-scalar sector becomes asymptotically free. C1 CENS,SERV PHYS THEOR,F-91191 GIF SUR YVETTE,FRANCE. RP KAHANA, SH (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. OI Kahana, Sidney/0000-0002-5790-9384 NR 14 TC 5 Z9 5 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 MAR 19 PY 1992 VL 278 IS 1-2 BP 11 EP 14 DI 10.1016/0370-2693(92)90702-6 PG 4 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HN247 UT WOS:A1992HN24700003 ER PT J AU DECAMP, D DESCHIZEAUX, B GOY, C LEES, JP MINARD, MN ALEMANY, R ARIZTIZABAL, F CRESPO, JM DELFINO, M FERNANDEZ, E GAITAN, V GARRIDO, L MIR, LM PACHECO, A PASCUAL, A CATANESI, MG CREANZA, D DEPALMA, M FARILLA, A IASELLI, G MAGGI, G MAGGI, M NATALI, S NUZZO, S QUATTROMINI, M RANIERI, A RASO, G ROMANO, F RUGGIERI, F SELVAGGI, G SILVESTRIS, L TEMPESTA, P ZITO, G GAO, Y HU, H HUANG, D HUANG, X LIN, J LOU, J QIAO, C WANG, T XIE, Y XU, D XU, R ZHANG, J ZHAO, W ATWOOD, WB BAUERDICK, LAT BIRD, F BLUCHER, E BONVICINI, G BOSSI, F BOUDREAU, J BURNETT, TH DREVERMANN, H FORTY, RW GRAB, C HAGELBERG, R HAYWOOD, S HILGART, J JOST, E KASEMANN, M KNOBLOCH, J LACOURT, A LANCON, E LEHRAUS, I LOHSE, T LUSIANI, A MARTINEZ, M MATO, P MENARY, S MEYER, T MINTEN, A MIOTTO, A MIQUEL, R MOSER, HG NASH, J PALAZZI, P PERLAS, JA RANJARD, F REDLINGER, G ROLANDI, L ROTH, A ROTHBERG, J RUAN, T SAICH, M SCHLATTER, D SCHMELLING, M TEJESSY, W WACHSMUTH, H WIEDENMANN, W WITZELING, W WOTSCHACK, J AJALTOUNI, Z BADAUD, F BARDADINOTWINOWSKA, M BENCHEIKH, AM ELFELLOUS, R FALVARD, A GAY, P GUICHENEY, C HENRARD, P JOUSSET, J MICHEL, B MONTRET, JC PALLIN, D PERRET, P PIETRZYK, B PRORIOL, J PRULHIERE, F STIMPFL, G HANSEN, JD HANSEN, JR HANSEN, PH MOLLERUD, R NILSSON, BS EFTHYMIOPOULOS, I SIMOPOULOU, E VAYAKI, A BADIER, J BLONDEL, A BONNEAUD, G BRIENT, JC FOUQUE, G GAMESS, A HARVEY, J ORTEU, S ROSOWSKY, A ROUGE, A RUMPF, M TANAKA, R VIDEAU, H CANDLIN, DJ PARSONS, MI VEITCH, E MONETA, L PARRINI, G CORDEN, M GEORGIOPOULOS, C LKEDA, M LANNUTTI, J LEVINTHAL, D MERMIKIDES, M SAWYER, L WASSERBAECH, S ANTONELLI, A BALDINI, R BENCIVENNI, G BOLOGNA, G CAMPANA, P CAPON, G CERUTTI, F CHIARELLA, V DETTORREPIAZZOLI, B FELICI, G LAURELLI, P MANNOCCHI, G MURTAS, F MURTAS, GP PASSALACQUA, L PEPEALTARELLI, M PICCHI, P ZOGRAFOU, P ALTOON, B BOYLE, O COLRAIN, P HALLEY, AW TENHAVE, I LYNCH, JG MAITLAND, W MORTON, WT RAINE, C SCARR, JM SMITH, K THOMPSON, AS TURNBULL, RM BRANDL, B BRAUN, O GEIGES, R GEWENIGER, C HANKE, P HEPP, V KLUGE, EE MAUMARY, Y PUTZER, A RENSCH, B STAHL, A TITTEL, K WUNSCH, M BELK, AT BEUSELINCK, R BINNIE, DM CAMERON, W CATTANEO, M COLLING, DJ DORNAN, PJ DUGEAY, S GREENE, AM HASSARD, JF LIESKE, NM PATTON, SJ PAYNE, DG PHILLIPS, MJ SEDGBEER, JK TAYLOR, G TOMALIN, IR WRIGHT, AG GIRTLER, P KUHN, D RUDOLPH, G BOWDERY, CK BRODBECK, TJ FINCH, AJ FOSTER, F HUGHES, G JACKSON, D KEEMER, NR NUTTALL, M PATEL, A SLOAN, T SNOW, SW WHELAN, EP BARCZEWSKI, T KLEINKNECHT, K RAAB, J RENK, B ROEHN, S SANDER, HG SCHMIDT, H STEEG, F WALTHER, SM WOLF, B AUBERT, JJ BENCHOUK, C BERNARD, V BONISSENT, A CARR, J COYLE, P DRINKARD, J ETIENNE, F PAPALEXIOU, S PAYRE, P QIAN, Z ROUSSEAU, D SCHWERNLING, P TALBY, M ADLUNG, S BECKER, H BLUM, W BROWN, D CATTANEO, P COWAN, G DEHNING, B DIETL, H DYDAK, F FERNANDEZBOSMAN, M HANSLKOZANECKA, T JAHN, A LANGE, E LAUBER, J LUTJENS, G LUTZ, G MANNER, W PAN, Y RICHTER, R ROTSCHEIDT, H SCHRODER, J SCHWARZ, AS SETTLES, R STIERLIN, U STIEGLER, U STDENIS, R TAKASHIMA, M THOMAS, J WOLF, G BERTIN, V BOUCROT, J CALLOT, O CHEN, X CORDIER, A DAVIER, M GRIVAZ, JF HEUSSE, P JANOT, P KIM, DW LEDIBERDER, F LEFRANCOIS, J LUTZ, AM SCHUNE, MH VEILLET, JJ VIDEAU, I ZHANG, Z ZOMER, F ABBANEO, D AMENDOLIA, SR BAGLIESI, G BATIGNANI, G BOSISIO, L BOTTIGLI, U BRADASCHIA, C CARPINELLI, M CIOCCI, MA DELLORSO, R FERRANTE, I FIDECARO, F FOA, L FOCARDI, E FORTI, F GATTO, C GIASSI, A GIORGI, MA LIGABUE, F MANNELLI, EB MARROCCHESI, PS MESSINEO, A PALLA, F SANGUINETTI, G STEINBERGER, J TENCHINI, R TONELLI, G TRIGGIANI, G VANNINI, C VENTURI, A VERDINI, PG WALSH, J CARTER, JM GREEN, MG MARCH, PV MEDCALF, T QUAZI, IS STRONG, JA WEST, LR WILDISH, T BOTTERILL, DR CLIFFT, RW EDGECOCK, TR EDWARDS, M FISHER, SM JONES, TJ NORTON, PR SALMON, DP THOMPSON, JC BLOCHDEVAUX, B COLAS, P KOZANECKI, W LOCCI, E LOUCATOS, S MONNIER, E PEREZ, P PERRIER, F RANDER, J RENARDY, JF ROUSSARIE, A SCHULLER, JP SCHWINDLING, J VALLAGE, B JOHNSON, RP LITKE, AM WEAR, J ASHMAN, JG BOOTH, CN BUTTAR, C CARNEY, RE CARTWRIGHT, S COMBLEY, F DOGRU, M HATFIELD, F MARTIN, J PARKER, D REEVES, P THOMPSON, LF BARBERIO, E BRANDT, S GRUPEN, C MEINHARD, H MIRABITO, L SCHAFER, U SEYWERD, H GANIS, G GIANNINI, G GOBBO, B RAGUSA, F BELLANTONI, L CINABRO, D CONWAY, JS COWEN, DF FENG, Z FERGUSON, DPS GAO, YS GRAHL, J HARTON, JL JARED, RC LECLAIRE, BW LISHKA, C PAN, YB PATER, JR SAADI, Y SHARMA, V SCHMITT, M SHI, ZH TANG, YH WALSH, AM WEBER, FV WHITNEY, MH WU, SL WU, X ZOBERNIG, G AF DECAMP, D DESCHIZEAUX, B GOY, C LEES, JP MINARD, MN ALEMANY, R ARIZTIZABAL, F CRESPO, JM DELFINO, M FERNANDEZ, E GAITAN, V GARRIDO, L MIR, LM PACHECO, A PASCUAL, A CATANESI, MG CREANZA, D DEPALMA, M FARILLA, A IASELLI, G MAGGI, G MAGGI, M NATALI, S NUZZO, S QUATTROMINI, M RANIERI, A RASO, G ROMANO, F RUGGIERI, F SELVAGGI, G SILVESTRIS, L TEMPESTA, P ZITO, G GAO, Y HU, H HUANG, D HUANG, X LIN, J LOU, J QIAO, C WANG, T XIE, Y XU, D XU, R ZHANG, J ZHAO, W ATWOOD, WB BAUERDICK, LAT BIRD, F BLUCHER, E BONVICINI, G BOSSI, F BOUDREAU, J BURNETT, TH DREVERMANN, H FORTY, RW GRAB, C HAGELBERG, R HAYWOOD, S HILGART, J JOST, E KASEMANN, M KNOBLOCH, J LACOURT, A LANCON, E LEHRAUS, I LOHSE, T LUSIANI, A MARTINEZ, M MATO, P MENARY, S MEYER, T MINTEN, A MIOTTO, A MIQUEL, R MOSER, HG NASH, J PALAZZI, P PERLAS, JA RANJARD, F REDLINGER, G ROLANDI, L ROTH, A ROTHBERG, J RUAN, T SAICH, M SCHLATTER, D SCHMELLING, M TEJESSY, W WACHSMUTH, H WIEDENMANN, W WITZELING, W WOTSCHACK, J AJALTOUNI, Z BADAUD, F BARDADINOTWINOWSKA, M BENCHEIKH, AM ELFELLOUS, R FALVARD, A GAY, P GUICHENEY, C HENRARD, P JOUSSET, J MICHEL, B MONTRET, JC PALLIN, D PERRET, P PIETRZYK, B PRORIOL, J PRULHIERE, F STIMPFL, G HANSEN, JD HANSEN, JR HANSEN, PH MOLLERUD, R NILSSON, BS EFTHYMIOPOULOS, I SIMOPOULOU, E VAYAKI, A BADIER, J BLONDEL, A BONNEAUD, G BRIENT, JC FOUQUE, G GAMESS, A HARVEY, J ORTEU, S ROSOWSKY, A ROUGE, A RUMPF, M TANAKA, R VIDEAU, H CANDLIN, DJ PARSONS, MI VEITCH, E MONETA, L PARRINI, G CORDEN, M GEORGIOPOULOS, C LKEDA, M LANNUTTI, J LEVINTHAL, D MERMIKIDES, M SAWYER, L WASSERBAECH, S ANTONELLI, A BALDINI, R BENCIVENNI, G BOLOGNA, G CAMPANA, P CAPON, G CERUTTI, F CHIARELLA, V DETTORREPIAZZOLI, B FELICI, G LAURELLI, P MANNOCCHI, G MURTAS, F MURTAS, GP PASSALACQUA, L PEPEALTARELLI, M PICCHI, P ZOGRAFOU, P ALTOON, B BOYLE, O COLRAIN, P HALLEY, AW TENHAVE, I LYNCH, JG MAITLAND, W MORTON, WT RAINE, C SCARR, JM SMITH, K THOMPSON, AS TURNBULL, RM BRANDL, B BRAUN, O GEIGES, R GEWENIGER, C HANKE, P HEPP, V KLUGE, EE MAUMARY, Y PUTZER, A RENSCH, B STAHL, A TITTEL, K WUNSCH, M BELK, AT BEUSELINCK, R BINNIE, DM CAMERON, W CATTANEO, M COLLING, DJ DORNAN, PJ DUGEAY, S GREENE, AM HASSARD, JF LIESKE, NM PATTON, SJ PAYNE, DG PHILLIPS, MJ SEDGBEER, JK TAYLOR, G TOMALIN, IR WRIGHT, AG GIRTLER, P KUHN, D RUDOLPH, G BOWDERY, CK BRODBECK, TJ FINCH, AJ FOSTER, F HUGHES, G JACKSON, D KEEMER, NR NUTTALL, M PATEL, A SLOAN, T SNOW, SW WHELAN, EP BARCZEWSKI, T KLEINKNECHT, K RAAB, J RENK, B ROEHN, S SANDER, HG SCHMIDT, H STEEG, F WALTHER, SM WOLF, B AUBERT, JJ BENCHOUK, C BERNARD, V BONISSENT, A CARR, J COYLE, P DRINKARD, J ETIENNE, F PAPALEXIOU, S PAYRE, P QIAN, Z ROUSSEAU, D SCHWERNLING, P TALBY, M ADLUNG, S BECKER, H BLUM, W BROWN, D CATTANEO, P COWAN, G DEHNING, B DIETL, H DYDAK, F FERNANDEZBOSMAN, M HANSLKOZANECKA, T JAHN, A LANGE, E LAUBER, J LUTJENS, G LUTZ, G MANNER, W PAN, Y RICHTER, R ROTSCHEIDT, H SCHRODER, J SCHWARZ, AS SETTLES, R STIERLIN, U STIEGLER, U STDENIS, R TAKASHIMA, M THOMAS, J WOLF, G BERTIN, V BOUCROT, J CALLOT, O CHEN, X CORDIER, A DAVIER, M GRIVAZ, JF HEUSSE, P JANOT, P KIM, DW LEDIBERDER, F LEFRANCOIS, J LUTZ, AM SCHUNE, MH VEILLET, JJ VIDEAU, I ZHANG, Z ZOMER, F ABBANEO, D AMENDOLIA, SR BAGLIESI, G BATIGNANI, G BOSISIO, L BOTTIGLI, U BRADASCHIA, C CARPINELLI, M CIOCCI, MA DELLORSO, R FERRANTE, I FIDECARO, F FOA, L FOCARDI, E FORTI, F GATTO, C GIASSI, A GIORGI, MA LIGABUE, F MANNELLI, EB MARROCCHESI, PS MESSINEO, A PALLA, F SANGUINETTI, G STEINBERGER, J TENCHINI, R TONELLI, G TRIGGIANI, G VANNINI, C VENTURI, A VERDINI, PG WALSH, J CARTER, JM GREEN, MG MARCH, PV MEDCALF, T QUAZI, IS STRONG, JA WEST, LR WILDISH, T BOTTERILL, DR CLIFFT, RW EDGECOCK, TR EDWARDS, M FISHER, SM JONES, TJ NORTON, PR SALMON, DP THOMPSON, JC BLOCHDEVAUX, B COLAS, P KOZANECKI, W LOCCI, E LOUCATOS, S MONNIER, E PEREZ, P PERRIER, F RANDER, J RENARDY, JF ROUSSARIE, A SCHULLER, JP SCHWINDLING, J VALLAGE, B JOHNSON, RP LITKE, AM WEAR, J ASHMAN, JG BOOTH, CN BUTTAR, C CARNEY, RE CARTWRIGHT, S COMBLEY, F DOGRU, M HATFIELD, F MARTIN, J PARKER, D REEVES, P THOMPSON, LF BARBERIO, E BRANDT, S GRUPEN, C MEINHARD, H MIRABITO, L SCHAFER, U SEYWERD, H GANIS, G GIANNINI, G GOBBO, B RAGUSA, F BELLANTONI, L CINABRO, D CONWAY, JS COWEN, DF FENG, Z FERGUSON, DPS GAO, YS GRAHL, J HARTON, JL JARED, RC LECLAIRE, BW LISHKA, C PAN, YB PATER, JR SAADI, Y SHARMA, V SCHMITT, M SHI, ZH TANG, YH WALSH, AM WEBER, FV WHITNEY, MH WU, SL WU, X ZOBERNIG, G TI EVIDENCE FOR B-BARYONS IN Z-DECAYS SO PHYSICS LETTERS B LA English DT Article ID BEAUTY AB In 160 000 hadronic Z decays recorded with the ALEPH detector at LEP, the yields of LAMBDA-l- and LAMBDA-l+ combinations have been measured. The observed excess of LAMBDA-l- over LAMBDA-l+ of 53 +/- 13 is interpreted as evidence for b baryons and their semileptonic decay. Assuming that three body decay processes such as LAMBDA(b) --> LAMBDA(c)+ l- vBAR dominate the semileptonic decay of b baryons, this excess corresponds to a product branching ratio BR(b --> LAMBDA(b)).BR(LAMBDA(b) --> LAMBDA(c)+ l- vBAR).BR(LAMBDA(c)+ --> LAMBDA-X) = (0.95 +/- 0.22 (stat.) +/- 0.21 (syst.))%, where LAMBDA(b) and LAMBDA(c)+ denote the bottom and charm baryons respectively. C1 UNIV AUTONOMA BARCELONA,INST FIS ALTES ENERGIES,E-08193 BARCELONA,SPAIN. IST NAZL FIS NUCL,BARI,ITALY. UNIV BARI,DIPARTIMENTO FIS,I-70126 BARI,ITALY. CHINESE ACAD SCI,INST HIGH ENERGY PHYS,BEIJING,PEOPLES R CHINA. CERN,EUROPEAN LAB PARTICLE PHYS,CH-1211 GENEVA 23,SWITZERLAND. UNIV CLERMONT FERRAND,PHYS CORPUSCULAIRE LAB,CNRS,INST NATL PHYS NUCL & PHYS PARTICULES,F-63177 CLERMONT FERRAND,FRANCE. NIELS BOHR INST,DK-2100 COPENHAGEN 0,DENMARK. DEMOCRITOS NUCL RES CTR,ATHENS,GREECE. ECOLE POLYTECH,CNRS,INST NATL PHYS NUCL & PHYS PARTICULES,F-91128 PALAISEAU,FRANCE. UNIV EDINBURGH,DEPT PHYS,EDINBURGH EH8 9JZ,MIDLOTHIAN,SCOTLAND. UNIV FLORENCE,IST NAZL FIZ NUCL,DIPARTIMENTO FIS,I-50125 FLORENCE,ITALY. FLORIDA STATE UNIV,SUPERCOMP COMPUTAT RES INST,TALLAHASSEE,FL 32306. FLORIDA STATE UNIV,DEPT PHYS,TALLAHASSEE,FL 32306. IST NAZL FIS NUCL,NAZL LAB,I-00044 FRASCATI,ITALY. UNIV GLASGOW,DEPT PHYS & ASTRON,GLASGOW G12 8QQ,SCOTLAND. UNIV HEIDELBERG,INST HOCHENERGIEPHYS,W-6900 HEIDELBERG,GERMANY. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,DEPT PHYS,LONDON SW7 2BZ,ENGLAND. UNIV INNSBRUCK,INST EXPTL PHYS,A-6020 INNSBRUCK,AUSTRIA. UNIV LANCASTER,DEPT PHYS,LANCASTER LA1 4YB,ENGLAND. UNIV MAINZ,INST PHYS,W-6500 MAINZ,GERMANY. FAC SCI LUMINY,CTR PHYS PARTICULES,CNRS,INST NATL PHYS NUCL & PHYS PARTICULES,F-13288 MARSEILLE,FRANCE. MAX PLANCK INST PHYS & ASTROPHYS,WERNER HEISENBERG INST PHYS,W-8000 MUNICH 40,GERMANY. UNIV PARIS 11,CNRS,INST NATL PHYS NUCL & PHYS PARTICULES,F-91405 ORSAY,FRANCE. UNIV PISA,IST NAZL FIZ NUCL,DIPARTIMENTO FIS,I-56100 PISA,ITALY. SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY. UNIV LONDON,ROYAL HOLLOWAY & BEDFORD NEW COLL,DEPT PHYS,EGHAM TW20 0EX,SURREY,ENGLAND. RUTHERFORD APPLETON LAB,DEPT PARTICLE PHYS,DIDCOT OX11 0QX,OXON,ENGLAND. CENS,DEPT PHYS PARTICULES ELEMENTAIRES,F-91191 GIF SUR YVETTE,FRANCE. UNIV CALIF SANTA CRUZ,INST PARTICLE PHYS,SANTA CRUZ,CA 95064. UNIV SHEFFIELD,DEPT PHYS,SHEFFIELD S3 7RH,S YORKSHIRE,ENGLAND. UNIV SIEGEW,FACHBEREICH PHYS,W-5900 SIEGEW,GERMANY. UNIV TRIESTE,DIPARTIMENTO FIS,I-34127 TRIESTE,ITALY. IST NAZL FIS NUCL,TRIESTE,ITALY. UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706. STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. UNIV WASHINGTON,SEATTLE,WA 98195. UNIV TURIN,IST FIS GEN,I-10124 TURIN,ITALY. NAPLES UNIV,DIPARTIMENTO SCI FIS,I-80138 NAPLES,ITALY. CNR,IST COSMO GEOFIS,TURIN,ITALY. CERN,DIV PPE,CH-1211 GENEVA 23,SWITZERLAND. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP DECAMP, D (reprint author), CNRS,INST NATL PHYS NUCL & PHYS PARTICULES,PHYS PARTICULES LAB,F-74019 ANNECY LE VIEUX,FRANCE. RI ANTONELLI, ANTONELLA/C-6238-2011; Buttar, Craig/D-3706-2011; Stahl, Achim/E-8846-2011; Passalacqua, Luca/F-5127-2011; St.Denis, Richard/C-8997-2012; Forti, Francesco/H-3035-2011; Focardi, Ettore/E-7376-2012; Venturi, Andrea/J-1877-2012; Perrier, Frederic/A-5953-2011; Rolandi, Luigi (Gigi)/E-8563-2013; Colas, Paul/F-2876-2013; Delfino, Manuel/A-1545-2012; Ligabue, Franco/F-3432-2014; Bosman, Martine/J-9917-2014; Fernandez, Enrique/L-5387-2014; Mir, Lluisa-Maria/G-7212-2015; ciocci, maria agnese /I-2153-2015; Hansen, John/B-9058-2015; Lusiani, Alberto/N-2976-2015; Marrocchesi, Pier Simone/N-9068-2015; Lusiani, Alberto/A-3329-2016; Murtas, Fabrizio/B-5729-2012; Booth, Christopher/B-5263-2016; Pacheco Pages, Andres/C-5353-2011; Ferrante, Isidoro/F-1017-2012 OI Stahl, Achim/0000-0002-8369-7506; Forti, Francesco/0000-0001-6535-7965; Focardi, Ettore/0000-0002-3763-5267; Rolandi, Luigi (Gigi)/0000-0002-0635-274X; Delfino, Manuel/0000-0002-9468-4751; Palazzi, Paolo/0000-0002-4861-391X; RASO, Giuseppe/0000-0002-5660-3711; Bottigli, Ubaldo/0000-0002-0666-3433; Ligabue, Franco/0000-0002-1549-7107; Bloch-Devaux, Brigitte/0000-0002-2463-1232; Martinez Rodriguez, Manel/0000-0002-9763-9155; Murtas, Fabrizio/0000-0002-7041-6541; Garrido Beltran, Lluis/0000-0001-8883-6539; Edgecock, Rob/0000-0002-7896-3312; Bosman, Martine/0000-0002-7290-643X; Fernandez, Enrique/0000-0002-6405-9488; Mir, Lluisa-Maria/0000-0002-4276-715X; ciocci, maria agnese /0000-0003-0002-5462; Hansen, John/0000-0002-8422-5543; Lusiani, Alberto/0000-0002-6876-3288; Marrocchesi, Pier Simone/0000-0003-1966-140X; Lusiani, Alberto/0000-0002-6876-3288; Booth, Christopher/0000-0002-6051-2847; Pacheco Pages, Andres/0000-0001-8210-1734; Ferrante, Isidoro/0000-0002-0083-7228 NR 23 TC 30 Z9 30 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 MAR 19 PY 1992 VL 278 IS 1-2 BP 209 EP 216 DI 10.1016/0370-2693(92)90736-N PG 8 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HN247 UT WOS:A1992HN24700037 ER PT J AU ROODT, A LEIPOLDT, JG DEUTSCH, EA SULLIVAN, JC AF ROODT, A LEIPOLDT, JG DEUTSCH, EA SULLIVAN, JC TI KINETIC AND STRUCTURAL STUDIES ON THE OXOTETRACYANOTECHNETATE(V) CORE - PROTONATION AND LIGATION OF DIOXOTETRACYANOTECHNETATE(V) IONS AND CRYSTAL-STRUCTURE OF 2,2'-BIPYRIDINIUM TRANS-OXOTHIOCYANATOTETRACYANOTECHNETATE(V) SO INORGANIC CHEMISTRY LA English DT Article ID SUBSTITUTION-REACTIONS; RE-186(SN) HEDP; COMPLEXES; TECHNETIUM; CHEMISTRY; MECHANISM; LIGANDS; ADDUCT AB The tetracyanodioxotechnetate(V) ion undergoes protonation reactions in the acidic aqueous solutions, forming the [TcO(OH)(CN)4]2- (1) and [TcO(OH2)(CN)4]- (2) complexes. A dimeric species, [Tc2O3(CN)8]4- (3), is rapidly formed from the hydroxo oxo complex, and it is therefore impossible to isolate complex 1. The coordinated water of [TcO(H2O)(CN)4]- can be displaced by monodentate ligands such as thiocyanate. The reaction with thiocyanate ions gives [TcO(NCS)(CN)4]2- (4), the composition and structure of which was confirmed by means of an X-ray crystal structure determination. 2,2'-Bipyridinium oxothio-cyanatotetracyanotechnetate(V) (C25H18N9OSTc) crystallizes in the monoclinic space group, C2/c, with a = 18.210 (4) angstrom, b = 19.473 (1) angstrom, c = 15.501 (3) angstrom, beta = 107.501 (14)-degrees, Z = 8, rho(calc) = 1.490 g cm-3. A final R value of 6.4% resulted from refinement of 1868 observed reflections. The first acid dissociation constant of 2 (at 15.0-degrees-C), the forward and reverse rate constants, and the equilibrium quotient for the reaction (at 25.0-degrees-C) trans-[TcO(H2O)(CN)4]- + NCS- reversible k-1 k1,k1 trans-]TcO(NCS)(CN)4)2- + H2O have been determined in 1.0 M (KNO3) ionic strength aqueous medium as 10(-2.90 (5)), 22.2 (3) M-1 s-1, 0.43 (4) s-1, and 4 (2) M-1, respectively. C1 UNIV ORANGE FREE STATE,DEPT CHEM,BLOEMFONTEIN 9300,SOUTH AFRICA. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. RP ROODT, A (reprint author), UNIV CINCINNATI,BIOMED CHEM RES CTR,CINCINNATI,OH 45221, USA. RI Roodt, Andreas/F-4696-2012 OI Roodt, Andreas/0000-0002-7349-6436 NR 33 TC 44 Z9 45 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD MAR 18 PY 1992 VL 31 IS 6 BP 1080 EP 1085 DI 10.1021/ic00032a030 PG 6 WC Chemistry, Inorganic & Nuclear SC Chemistry GA HK158 UT WOS:A1992HK15800030 ER PT J AU BAKAC, A JANNI, JA ESPENSON, JH AF BAKAC, A JANNI, JA ESPENSON, JH TI A NOVEL PHOTOCHEMICAL, PH-CONTROLLED SYNTHESIS OF ORGANOCHROMIUM COMPLEXES SO INORGANIC CHEMISTRY LA English DT Article ID TRANSITION-METAL COMPLEXES; AQUEOUS-SOLUTION; ELECTRON-TRANSFER; KINETICS; CHROMIUM(II); GENERATION; RADICALS; IONS AB The irradiation of aqueous solutions of Cr2+ and RX (R = primary, secondary, and tertiary alkyl; X = Br, Cl) at 254 nm and pH 3 yields the organochromium cations (H2O)5CrR2+. The method is based on the photochemical generation of hydrated electrons and subsequent reduction of the alkyl halides to carbon-centered radicals. The colligation with Cr2+ then yields the desired organochromium complexes. In the presence of alcohols as cosolvents the nature of the group R in (H2O)5CrR2+ depends on the pH. At pH 3, R is derived from RX, and at pH 0, from the alcohol. The photochemical method was used to prepare, among others, the novel tert-butylchromium(III) ion (H2O)5CrC(CH3)3(2+). In the presence of scavengers for Cr2+ and/or .C(CH3)3 this complex decomposes rapidly by homolysis of the Cr-C bond, k(h) = 0.60 s-1 at 25.0-degrees-C. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP BAKAC, A (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 21 TC 1 Z9 1 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD MAR 18 PY 1992 VL 31 IS 6 BP 1088 EP 1090 DI 10.1021/ic00032a032 PG 3 WC Chemistry, Inorganic & Nuclear SC Chemistry GA HK158 UT WOS:A1992HK15800032 ER PT J AU BAKAC, A ESPENSON, JH AF BAKAC, A ESPENSON, JH TI A HIGH-YIELD ONE-STEP SYNTHESIS OF TRANS-[CR([14]ANEN4)CL2]CL AND ITS CONVERSION TO TRANS-[CR([14]ANEN4)(H2O)2](CF3SO3)3 SO INORGANIC CHEMISTRY LA English DT Note ID CHROMIUM(III) COMPLEXES; TRANS-DIAMMINE(1,4,8,11-TETRAAZACYCLOTETRADECANE)CHROMIUM(III); LIGANDS C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP BAKAC, A (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 12 TC 21 Z9 21 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD MAR 18 PY 1992 VL 31 IS 6 BP 1108 EP 1110 DI 10.1021/ic00032a038 PG 3 WC Chemistry, Inorganic & Nuclear SC Chemistry GA HK158 UT WOS:A1992HK15800038 ER PT J AU KARRAKER, DG SMITH, PK AF KARRAKER, DG SMITH, PK TI ALPHA-FEF3.3H2O AND BETA-FEF3.3H2O REVISITED - CRYSTAL-STRUCTURE AND FE-57 MOSSBAUER-SPECTRA SO INORGANIC CHEMISTRY LA English DT Note RP KARRAKER, DG (reprint author), WESTINGHOUSE SAVANNAH RIVER CO,SAVANNAH RIVER SITE,AIKEN,SC 29808, USA. NR 9 TC 19 Z9 20 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD MAR 18 PY 1992 VL 31 IS 6 BP 1118 EP 1120 DI 10.1021/ic00032a042 PG 3 WC Chemistry, Inorganic & Nuclear SC Chemistry GA HK158 UT WOS:A1992HK15800042 ER PT J AU ANDERSON, SL DATYE, AK BRAUNSCHWEIG, EJ PEDEN, CHF AF ANDERSON, SL DATYE, AK BRAUNSCHWEIG, EJ PEDEN, CHF TI REACTIVITY OF NOVEL ION-EXCHANGED NICKEL HYDROUS TITANATE CATALYSTS SO APPLIED CATALYSIS A-GENERAL LA English DT Article DE HYDROUS METAL OXIDES; NICKEL; TITANATES; TRANSMISSION ELECTRON MICROSCOPY ID N-BUTANE; HYDROGENOLYSIS; SURFACE; SUPPORT AB Hydrous metal oxides constitute a new class of catalyst supports that can stabilize metals in a state of high dispersion even at high metal loadings. [Dosch et al., U.S. patent 4 511 455 (1985)]. Hydrous metal oxide supports are prepared by the reaction of a metal alkoxide and sodium hydroxide followed by hydrolysis. In this study, an amorphous hydrous titanium oxide (HTO) with approximate composition of NaTi2O5 was used. The sodium was quantitatively exchanged for nickel to yield a highly dispersed nickel catalyst. TEM, hydrogen chemisorption, benzene hydrogenation and butane hydrogenolysis were used to characterize the state of nickel and provide comparisons to conventionally prepared nickel catalysts. Elemental analysis of numerous areas within the sample with a 100 angstrom diameter probe in the TEM confirmed that the nickel was uniformly dispersed in the as-prepared Ni/HTO catalyst. Using butane hydrogenolysis as a test reaction, it was found that the catalyst had to be reduced at a temperature of at least 623 K before appreciable reactivity could be achieved. At this stage, a significant fraction of the nickel was found to have aggregated into large particles (> 100 angstrom) and the catalyst behaved very much like a conventional nickel catalyst supported on titania. Therefore, although nickel could be deposited on the HTO support in a state of high dispersion, reduction of the nickel led to agglomeration into large metallic particles, and the active catalyst resembled conventionally prepared nickel catalysts. C1 UNIV NEW MEXICO,DEPT CHEM & NUCL ENGN,ALBUQUERQUE,NM 87131. CTR MICRO ENGINEERED CERAM,ALBUQUERQUE,NM 87131. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. OI Peden, Charles/0000-0001-6754-9928; Datye, Abhaya/0000-0002-7126-8659 NR 20 TC 5 Z9 5 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0926-860X J9 APPL CATAL A-GEN JI Appl. Catal. A-Gen. PD MAR 16 PY 1992 VL 82 IS 2 BP 185 EP 198 DI 10.1016/0926-860X(92)85004-U PG 14 WC Chemistry, Physical; Environmental Sciences SC Chemistry; Environmental Sciences & Ecology GA HK837 UT WOS:A1992HK83700004 ER PT J AU ABREFAH, J OLANDER, DR BALOOCH, M SIEKHAUS, WJ AF ABREFAH, J OLANDER, DR BALOOCH, M SIEKHAUS, WJ TI VAPOR-PRESSURE OF BUCKMINSTERFULLERENE SO APPLIED PHYSICS LETTERS LA English DT Article ID CARBON AB The vapor pressures of the fullerenes C60 and C70 have been measured over the temperature range 400-600-degrees-C by the Knudsen-effusion thermogravimetric technique. For C60, a heat of sublimation of 38 +/- 1 kcal/mol is obtained, and the value for C70 is 45 +/- 1 kcal/mol. The vapor pressure of C60 ranges from 1.8 X 10(-5) and 1.4 X 10(-2) Torr and that of C70 is between 1.4 X 10(-5) and 8.7 X 10(-3) Torr over the temperature range investigated. At 500-degrees-C, the vapor pressure of C60 is about 10(35) that of graphite. The entropy of vaporization of C60 obeys Trouton's rule. C1 UNIV CALIF BERKELEY,DEPT NUCL ENGN,BERKELEY,CA 94720. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,DIV CONDENSED MATTER & ANALYT SCI,LIVERMORE,CA 94550. RP ABREFAH, J (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720, USA. NR 3 TC 193 Z9 194 U1 1 U2 16 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 16 PY 1992 VL 60 IS 11 BP 1313 EP 1314 DI 10.1063/1.107327 PG 2 WC Physics, Applied SC Physics GA HH876 UT WOS:A1992HH87600013 ER PT J AU WU, XD LUO, L MUENCHAUSEN, RE SPRINGER, KN FOLTYN, S AF WU, XD LUO, L MUENCHAUSEN, RE SPRINGER, KN FOLTYN, S TI CREATION OF 45-DEGREES GRAIN-BOUNDARY JUNCTIONS BY LATTICE ENGINEERING SO APPLIED PHYSICS LETTERS LA English DT Article ID DC SQUIDS; DEPOSITION; FILMS AB The in-plane, orientational relationships between LaAlO3, SrTiO3, yttria-stabilized zirconia, MgO, CeO2, BaZrO3, and YBa2Cu3O7-delta (YBCO) are studied. Using a idea of continuous lattice match and photolithographic technique, a 45-degrees YBCO grain-boundary junction can be created on most substrates. The key element of the process is the utilization of a bridge layer. In addition to MgO bridge material, BaZrO3 was found to work functionally well. The crystallinity of the bridge layer is critical to obtain a clean boundary junction. C1 UNIV CALIF LOS ALAMOS SCI LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. RP WU, XD (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,CTR EXPLORATORY RES & DEV,LOS ALAMOS,NM 87545, USA. NR 16 TC 46 Z9 51 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 16 PY 1992 VL 60 IS 11 BP 1381 EP 1383 DI 10.1063/1.107297 PG 3 WC Physics, Applied SC Physics GA HH876 UT WOS:A1992HH87600036 ER PT J AU LI, MF YU, PY WEBER, ER AF LI, MF YU, PY WEBER, ER TI OCCUPANCY OF THE DX CENTER IN N-AL0.32GA0.68AS UNDER UNIAXIAL-STRESS - COMMENT SO APPLIED PHYSICS LETTERS LA English DT Letter ID ALLOYS C1 UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP LI, MF (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 8 TC 0 Z9 0 U1 1 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 16 PY 1992 VL 60 IS 11 BP 1404 EP 1404 DI 10.1063/1.107305 PG 1 WC Physics, Applied SC Physics GA HH876 UT WOS:A1992HH87600044 ER PT J AU WOO, LK MAURYA, MR JACOBSON, RA YANG, SM RINGROSE, SL AF WOO, LK MAURYA, MR JACOBSON, RA YANG, SM RINGROSE, SL TI A COMPARISON OF 2 STRUCTURAL FORMS OF ALPHA,ALPHA-5,15-BIS(ORTHO-NICOTINOYLAMIDOPHENYL)-2,8,12,18-TETRAETHYL-3 ,7,13,17-TETRAMETHYLPORPHYRINATO NICKEL(II) SO INORGANICA CHIMICA ACTA LA English DT Article ID MOLECULAR-STRUCTURE; (5,10,15,20-TETRAMETHYLPORPHYRINATO)NICKEL(II); METHANOBACTERIUM AB The structure of alpha,alpha-5,15-bis(omicron-nicotinoylamidophenyl)-2,8,12-18-tetraethyl-3,7,13,17-tetramethylporphyrinato nickel(II), [Ni(DPE)]-(py)2 has been determined by single-crystal X-ray diffraction analysis. [Ni(DPE)]-(py)2.H2O crystallizes from wet DMF/CH3OH with one water molecule solvate, C56H54N8O3Ni in the space group P2(1)/n with a = 14.240(2), b = 25.418(4), c = 14.725(5) angstrom, beta = 117.20(6)-degrees, V = 4740(4) angstrom3, Z = 4, R = 0.0807 and R(w) = 0.1072. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP WOO, LK (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 18 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0020-1693 J9 INORG CHIM ACTA JI Inorg. Chim. Acta PD MAR 16 PY 1992 VL 193 IS 2 BP 143 EP 147 PG 5 WC Chemistry, Inorganic & Nuclear SC Chemistry GA HW792 UT WOS:A1992HW79200004 ER PT J AU ILIADIS, C GIESEN, U GORRES, J WIESCHER, M GRAFF, SM AZUMA, RE BARNES, CA AF ILIADIS, C GIESEN, U GORRES, J WIESCHER, M GRAFF, SM AZUMA, RE BARNES, CA TI DIRECT PROTON CAPTURE ON S-32 SO NUCLEAR PHYSICS A LA English DT Article AB The S-32(p, gamma)Cl-33 reaction has been measured in the proton-energy range E(p) = 0.4-2.0 MeV. Non-resonant gamma-transitions were observed to the final states in Cl-33 at E(x) = 0, 811 and 2846 keV. The corresponding spectroscopic factors have been extracted from fits to the excitation functions and are compared to values from stripping data as well as theoretical model calculations. The astrophysical aspects of the S-32(p, gamma)Cl-33 reaction are also discussed. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. UNIV TORONTO,MCLENNAN PHYS LABS,TORONTO M5S 1A7,ONTARIO,CANADA. CALTECH,WK KELLOGG RADIAT LAB,PASADENA,CA 91125. RP ILIADIS, C (reprint author), UNIV NOTRE DAME,COLL SCI,DEPT PHYS,NOTRE DAME,IN 46556, USA. NR 25 TC 16 Z9 16 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD MAR 16 PY 1992 VL 539 IS 1 BP 97 EP 111 DI 10.1016/0375-9474(92)90237-E PG 15 WC Physics, Nuclear SC Physics GA HK466 UT WOS:A1992HK46600006 ER PT J AU SCHMITZ, W YANG, CX HUBEL, H BYRNE, AP MUSSELER, R SINGH, N MAIER, KH KUHNERT, A WYSS, R AF SCHMITZ, W YANG, CX HUBEL, H BYRNE, AP MUSSELER, R SINGH, N MAIER, KH KUHNERT, A WYSS, R TI HIGH-SPIN STATES IN LU-163 SO NUCLEAR PHYSICS A LA English DT Article DE 130LA(SI-28,4N); E = 150 MEV; MEASURED GAMMA-GAMMA-COINCIDENCES; GAMMA-GAMMA-(THETA); 163LU DEDUCED LEVELS; J, CRANKED SHELL MODEL AND TOTAL ROUTHIAN SURFACE CALCULATIONS ID RARE-EARTH NUCLEI; TRANSITION-PROBABILITIES; BAND; INTRUDER; DEFORMATION; ENERGIES; CROSSINGS; TM-159; REGION; SM-135 AB High-spin states in 163Lu were investigated by in-beam gamma-ray spectroscopy using the multidetector array OSIRIS. One decoupled and two strongly coupled bands were observed up to high spins and a fragment of a second decoupled band was established. The band structures are connected to previously known low-spin states. An anomalously low-frequency second band crossing is observed in one of the strongly coupled bands. Band crossing frequencies and aligned angular momenta are interpreted within the framework of the cranked shell model. B(M1)/B(E2) ratios are determined and compared to calculated values. Evidence is presented that the decoupled band may have a much larger deformation than the coupled bands. We suggest that it is built on the proton i13/2 intruder configuration. C1 JOINT INST HEAVY ION RES,OAK RIDGE,TN 37831. INST ATOM ENERGY,BEIJING,PEOPLES R CHINA. AUSTRALIAN NATL UNIV,DEPT NUCL PHYS,CANBERRA,ACT 2601,AUSTRALIA. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. HAHN MEITNER INST KERNFORSCH,W-1000 BERLIN,GERMANY. PUNJAB UNIV,DEPT PHYS,CHANDIGARH 160014,INDIA. RP SCHMITZ, W (reprint author), UNIV BONN,INST STRAHLEN & KERNPHYS,NUSSALLEE 14-16,W-5300 BONN,GERMANY. OI Byrne, Aidan/0000-0002-7096-6455 NR 35 TC 58 Z9 64 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD MAR 16 PY 1992 VL 539 IS 1 BP 112 EP 136 DI 10.1016/0375-9474(92)90238-F PG 25 WC Physics, Nuclear SC Physics GA HK466 UT WOS:A1992HK46600007 ER PT J AU GRIFFIN, PA AF GRIFFIN, PA TI SOLVING 3+1 QCD ON THE TRANSVERSE LATTICE USING 1+1 CONFORMAL FIELD-THEORY SO NUCLEAR PHYSICS B LA English DT Article ID MASSIVE SCHWINGER MODEL; WESS-ZUMINO MODEL; 2 DIMENSIONS; QUANTIZATION AB A new transverse lattice model of 3 + 1 Yang - Mills theory is constructed by introducing Wess - Zumino terms into the 2D unitary non-linear sigma model action for link fields on a 2D lattice. The Wess - Zumino terms permit one to solve the basic non-linear sigma model dynamics of each link, for discrete values of the bare QCD coupling constant, by applying the representation theory of non-abelian current (Kac - Moody) algebras. This construction eliminates the need to approximate the non-linear sigma model dynamics of each link with a linear sigma model theory, as in previous transverse lattice formulations. The non-perturbative behavior of the non-linear sigma model is preserved by this construction. While the new model is in principle solvable by a combination of conformal field theory, discrete light-cone, and lattice gauge theory techniques, it is more realistically suited for study with a Tamm - Dancoff truncation of excited states. In this context, it may serve as a useful framework for the study of non-perturbative phenomena in QCD via analytic techniques. RP GRIFFIN, PA (reprint author), FERMI NATL ACCELERATOR LAB,THEORY GRP,MS 106,POB 500,BATAVIA,IL 60510, USA. NR 23 TC 17 Z9 17 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD MAR 16 PY 1992 VL 372 IS 1-2 BP 270 EP 292 DI 10.1016/0550-3213(92)90320-B PG 23 WC Physics, Particles & Fields SC Physics GA HP995 UT WOS:A1992HP99500012 ER PT J AU CAI, ZX SEN, S MAHANTI, SD AF CAI, ZX SEN, S MAHANTI, SD TI LONG-TIME DYNAMICS VIA DIRECT SUMMATION OF INFINITE CONTINUED FRACTIONS SO PHYSICAL REVIEW LETTERS LA English DT Article ID RECURRENCE RELATIONS; HEISENBERG CHAIN; FORMALISM; MODEL AB Mori theory leads to in(finite) continued fractions [I(F)CF's] which upon inverse Laplace transformation (ILT) give the dynamical correlations in Hamiltonian systems. We propose a direct summation method to evaluate these ICF's, e.g., 1/[z + DELTA-1(z + ... to infinity)], by replacing them with FCF's with poles L = 10-zeta 2 less-than-or-equal-to zeta less-than-or-equal-to 5, for DELTA(mu) = mu(phi), phi < 2. Long-time dynamics is obtained upon an ILT of the ICF for 0 less-than-or-equal-to t less-than-or-equal-to tau with tau = f(phi,zeta) being large. Our studies on dynamical correlations for boundary spins in S = 1/2 XY chains agree very well with a recent exact solution for these correlations. C1 MICHIGAN STATE UNIV,DEPT PHYS,E LANSING,MI 48824. RP CAI, ZX (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,BLDG 480,UPTON,NY 11973, USA. NR 24 TC 34 Z9 34 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 MAR 16 PY 1992 VL 68 IS 11 BP 1637 EP 1640 DI 10.1103/PhysRevLett.68.1637 PG 4 WC Physics, Multidisciplinary SC Physics GA HJ807 UT WOS:A1992HJ80700005 ER PT J AU SIVERS, D URETSKY, JL AF SIVERS, D URETSKY, JL TI S-MATRIX BOOTSTRAP OF A SCALAR HIGGS BOSON SO PHYSICAL REVIEW LETTERS LA English DT Article ID DYNAMICAL SYMMETRY BREAKING AB We use the N/D formalism to perform a bootstrap calculation of a neutral, scalar resonance coupled to longitudinal W,Z gauge bosons. We find that a consistent solution only exists for a mass value very close to 2.01 gauge-boson masses. The solution does not constrain the couplings and requires large scattering lengths. C1 COLL DUPAGE,GLEN ELLYN,IL 61137. RP SIVERS, D (reprint author), ARGONNE NATL LAB,DIV HIGH ENERGY PHYS,ARGONNE,IL 60439, USA. NR 18 TC 4 Z9 4 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 MAR 16 PY 1992 VL 68 IS 11 BP 1649 EP 1652 DI 10.1103/PhysRevLett.68.1649 PG 4 WC Physics, Multidisciplinary SC Physics GA HJ807 UT WOS:A1992HJ80700008 ER PT J AU CRUTCHFIELD, WY SNYDERMAN, NJ BROWN, VR AF CRUTCHFIELD, WY SNYDERMAN, NJ BROWN, VR TI DEUTERON IN THE SKYRME MODEL SO PHYSICAL REVIEW LETTERS LA English DT Article ID CURRENT-ALGEBRA; SPECTRUM; BARYONS; SYSTEM AB Classical bound-state solutions for the baryon number = 2 sector of the Skyrme model have been found by numerical simulation in 3 + 1 dimensions. The Bohr-Sommerfeld level of quantization is implemented. Properties of the deuteron obtained by quantization about the periodic classical solution improve on previous work based on quantization about the minimum energy static toroidal configuration. RP CRUTCHFIELD, WY (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 28 TC 17 Z9 17 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 MAR 16 PY 1992 VL 68 IS 11 BP 1660 EP 1662 DI 10.1103/PhysRevLett.68.1660 PG 3 WC Physics, Multidisciplinary SC Physics GA HJ807 UT WOS:A1992HJ80700011 ER PT J AU BRODA, R MAYER, RH BEARDEN, IG BENET, P DALY, PJ GRABOWSKI, ZW CARPENTER, MP JANSSENS, RVF KHOO, TL LAURITSEN, T MOORE, EF LUNARDI, S BLOMQVIST, J AF BRODA, R MAYER, RH BEARDEN, IG BENET, P DALY, PJ GRABOWSKI, ZW CARPENTER, MP JANSSENS, RVF KHOO, TL LAURITSEN, T MOORE, EF LUNARDI, S BLOMQVIST, J TI YRAST ISOMERS IN TIN NUCLEI FROM HEAVY-ION COLLISIONS AND THE VH11/2 SUBSHELL FILLING SO PHYSICAL REVIEW LETTERS LA English DT Article ID TRANSITION-PROBABILITIES; ISOTOPES; STATES AB Long-lived 10+ isomers in Sn-122 and 124Sn have been identified among the products of 124Sn = 325 MeV Ge-76 collisions. The measurements virtually complete a series of B(E2) determinations for (vh11/2)n states in Sn-116-130, which pinpoint half filling of the vh11/2 subshell very close to N = 73. Results for these Z = 50 isotopes and for the N = 82 isotones are contrasted, and an enlightening comparison between the effective E2 charges observed in tin and lead isotopes is developed. C1 PURDUE UNIV,DEPT PHYS,W LAFAYETTE,IN 47907. ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439. UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY. MANNE SIEGBAHN INST PHYS,S-10405 STOCKHOLM,SWEDEN. RP BRODA, R (reprint author), PURDUE UNIV,DEPT CHEM,W LAFAYETTE,IN 47907, USA. RI Bearden, Ian/M-4504-2014; Carpenter, Michael/E-4287-2015 OI Bearden, Ian/0000-0003-2784-3094; Carpenter, Michael/0000-0002-3237-5734 NR 17 TC 79 Z9 81 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 MAR 16 PY 1992 VL 68 IS 11 BP 1671 EP 1674 DI 10.1103/PhysRevLett.68.1671 PG 4 WC Physics, Multidisciplinary SC Physics GA HJ807 UT WOS:A1992HJ80700014 ER PT J AU DEWITT, DR SCHNEIDER, D CHEN, MH CLARK, MW MCDONALD, JW SCHNEIDER, MB AF DEWITT, DR SCHNEIDER, D CHEN, MH CLARK, MW MCDONALD, JW SCHNEIDER, MB TI DIELECTRONIC RECOMBINATION CROSS-SECTIONS OF NEON-LIKE XENON SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGHLY CHARGED IONS; EXCITATION; OXYGEN AB High-resolution measurements of dielectronic recombination cross sections for neonlike xenon (Xe44+) are presented. The experimental method consists of the formation and interaction of ions with electrons in an ion trap followed by an analysis of the extracted ions to determine relative yields. Low beam currents are used to obtain an energy resolution of 16 eV FWHM. Reductions in the number of initial ions of more than 3 orders of magnitude are observed as the strongest resonances are scanned. The relative contributions of the LMM, LMN, LMO, LMP, and LMQ groups of resonances are compared to theoretical calculations. The agreement with theory is excellent. RP DEWITT, DR (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 16 TC 27 Z9 29 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 MAR 16 PY 1992 VL 68 IS 11 BP 1694 EP 1697 DI 10.1103/PhysRevLett.68.1694 PG 4 WC Physics, Multidisciplinary SC Physics GA HJ807 UT WOS:A1992HJ80700020 ER PT J AU CHAKOUMAKOS, BC LAGER, GA FERNANDEZBACA, JA AF CHAKOUMAKOS, BC LAGER, GA FERNANDEZBACA, JA TI REFINEMENT OF THE STRUCTURES OF SR3AL2O6 AND THE HYDROGARNET SR3AL2(O4D4)3 BY RIETVELD ANALYSIS OF NEUTRON POWDER DIFFRACTION DATA SO ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS LA English DT Article ID X-RAY; GARNETS AB Sr3Al2O6, M(r) = 412.81, cubic, Pa3, a = 15.8556 (4) angstrom, V = 3986.0 (5) angstrom 3, Z = 24, D(x) = 4.126 g cm-3, lambda = 1.400 angstrom, mu-R = 0.020, T = 295 K, R(exp) = 0.0295, R(wp) = 0.0447 for 2415 step intensities, R(Bragg) = 0.0168 for 1606 reflections. The noteworthy feature of the strontium aluminate structure is a puckered six-membered AlO4 tetrahedral ring, with the average bridging Al-O bond length, 1.768 (8) angstrom, slightly greater than the average non-bridging Al-O bond length, 1.746 (5) angstrom. Sr3Al2(O4D4)3, M(r) = 532.98, cubic, Ia3d, a = 13.0319 (1) angstrom, V = 2213.2 (2) angstrom 3, Z = 8, D(x) = 3.128 g cm-3, lambda = 1.400 angstrom, mu-R = 0.012, T = 295 K, R(exp) = 0.0316, R(wp) = 0.0464 for 2400 step intensities, R(Bragg) = 0.0148 for 224 reflections. Sr3Al2(O4D4)3 has the hydrogarnet structure, which in contrast to the silicate garnets, has the D4O4 unit in place of the SiO4 unit. The O-D distance is 0.914 (4) angstrom, and the refined D content of the H position is 90%. Both the Sr hydrogarnet and the aluminate are isostructural with the Ca analogs. The enhanced reactivity of Sr3Al2O6 to form the hydrogarnet as compared to that of Ca3Al2O6 is ascribed to the increased cell size and strain caused by the substitution of the larger sized Sr for Ca. C1 UNIV LOUISVILLE,DEPT GEOL,LOUISVILLE,KY 40292. RP CHAKOUMAKOS, BC (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37830, USA. RI Fernandez-Baca, Jaime/C-3984-2014; Chakoumakos, Bryan/A-5601-2016 OI Fernandez-Baca, Jaime/0000-0001-9080-5096; Chakoumakos, Bryan/0000-0002-7870-6543 NR 22 TC 42 Z9 46 U1 4 U2 20 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0108-2701 J9 ACTA CRYSTALLOGR C JI Acta Crystallogr. Sect. C-Cryst. Struct. Commun. PD MAR 15 PY 1992 VL 48 BP 414 EP 419 DI 10.1107/S0108270191010211 PN 3 PG 6 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA HK302 UT WOS:A1992HK30200003 ER PT J AU SCHRIER, SL MOHANDAS, N AF SCHRIER, SL MOHANDAS, N TI GLOBIN-CHAIN SPECIFICITY OF OXIDATION-INDUCED CHANGES IN RED-BLOOD-CELL MEMBRANE-PROPERTIES SO BLOOD LA English DT Article ID ERYTHROCYTE-MEMBRANE; BETA-THALASSEMIA; HEINZ BODIES; DEFORMABILITY; STABILITY C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CELL & MOLEC BIOL,BERKELEY,CA 94720. RP SCHRIER, SL (reprint author), STANFORD UNIV,MED CTR,SCH MED,DIV HEMATOL,5161,STANFORD,CA 94305, USA. FU NIDDK NIH HHS [DK 13682, DK 26263] NR 21 TC 54 Z9 55 U1 1 U2 1 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD MAR 15 PY 1992 VL 79 IS 6 BP 1586 EP 1592 PG 7 WC Hematology SC Hematology GA HH745 UT WOS:A1992HH74500029 PM 1547347 ER PT J AU SEED, TM KASPAR, LV AF SEED, TM KASPAR, LV TI ACQUIRED RADIORESISTANCE OF HEMATOPOIETIC PROGENITORS (GRANULOCYTE MONOCYTE COLONY-FORMING-UNITS) DURING CHRONIC RADIATION LEUKEMOGENESIS SO CANCER RESEARCH LA English DT Article ID GAMMA-IRRADIATION; DOSE RATE; ULTRASTRUCTURE; REPAIR; DOG AB Protracted exposure of dogs to low daily doses of whole-body gamma-radiation (7.5 cGy/day for duration of life) elicits a high incidence of myeloid leukemia or related myeloproliferative disorders. Under such exposure, vital hematopoietic progenitors [granulocyte/monocyte colony-forming units in agar (CFU-GM)] acquire increased radioresistance along with renewed proliferative capacity at an early phase of evolving myeloid leukemia. To further characterize the expression of acquired radioresistance by CFU-GM, we evaluated the effects of various exposure rates, cumulative radiation doses, and times of exposure and postexposure in several groups of long-lived dogs under two conditions of irradiation: (a) continuous, duration-of-life exposures at dose rates of 0.3 - 7.5 cGy/day; and (b) discontinuous, fraction-of-life exposures at dose rates of 3.8 - 26.3 cGy/day, with cumulative doses of 450-3458 cGy and postexposure times of 14-4702 days. Results indicated that (a) under protracted continuous irradiation, the degree of radioresistance expressed by CFU-GM in vitro increased markedly in a biphasic pattern with rising daily rates of exposure; (b) under discontinuous, fraction-of-life exposure regimens, elevated levels of radioresistance were expressed and stably maintained by CFU-GM only following large radiation doses accumulated at high dose rates; and (c) with extended postexposure times, the magnitude of expressed radioresistance appeared to wane. These results continue to support the hypothesis that the acquisition of radioresistance and associated repair functions by vital lineage-committed progenitors, under the strong selective and mutagenic pressure of chronic irradiation, is tied temporally and causally to leukemogenic transformation elicited by radiation exposure. RP SEED, TM (reprint author), ARGONNE NATL LAB,DIV BIOL & MED RES BIM202,RADIAT HEMATOL GRP,9700 S CASS AVE,ARGONNE,IL 60439, USA. FU NCI NIH HHS [Y01-CP-50503] NR 36 TC 9 Z9 10 U1 0 U2 0 PU AMER ASSOC CANCER RESEARCH PI PHILADELPHIA PA PUBLIC LEDGER BLDG, SUITE 816, 150 S. INDEPENDENCE MALL W., PHILADELPHIA, PA 19106 SN 0008-5472 J9 CANCER RES JI Cancer Res. PD MAR 15 PY 1992 VL 52 IS 6 BP 1469 EP 1476 PG 8 WC Oncology SC Oncology GA HJ145 UT WOS:A1992HJ14500016 PM 1540954 ER PT J AU SUMPTER, BG NOID, DW AF SUMPTER, BG NOID, DW TI COMPUTATIONAL EXPERIMENTS ON THE INTRAMOLECULAR ENERGY-FLOW IN MACROMOLECULES SO CHEMICAL PHYSICS LA English DT Article ID OVERTONE-INDUCED ISOMERIZATION; VIBRATIONAL-RELAXATION; HYDROGEN-PEROXIDE; SEMICLASSICAL CALCULATION; UNIMOLECULAR REACTIONS; CLASSICAL DYNAMICS; MULTIDIMENSIONAL SYSTEM; INDUCED DISSOCIATION; CD OVERTONES; BOUND-STATES AB The microscopic details of the flow of energy in a single chain of polyethylene containing 300 atoms is discussed. The intramolecular dynamics of the polyethylene molecule is studied as a function of CH stretch excitation, temperature, and pressure. The rate of energy flow from CH stretching modes is found to be very rapid and irreversible, occurring on a timescale of less than 0.5 ps at low temperatures, and increases with temperature. A general characteristic two-phase energy flow behavior is observed, where there is initially a very rapid flow (due to the decay of the initial excitation) followed by a slower flow (due to energy redistribution throughout the system). The mechanism for the initial facile energy flow is shown to involve strong resonant pathways. In particular, a CH stretch/HCH bend Fermi (1:2) resonance is shown to dominate the short-time dynamics and facilitates the overall process of energy redistribution. The increase in the rate of energy flow as a function of the backbone temperature is found to be due to the increase in the density of the bath states for energy redistribution which subsequently results in the formation of new low-order resonant interactions (1:1, etc). The long-time dynamics, associated to complete redistribution of the initial CH stretch energy with all of the 894 available vibrational modes, occurs within a time of 2 ps. This timescale corresponds to the time for intramolecular redistribution. A comparison of the intramolecular redistribution time to that of intermolecular redistribution (redistribution in the condensed or solid phase as opposed to a single chain) is also made. A preliminary study of energy flow in a crystal of polyethylene (system containing 19 polyethylene chains) shows that the energy flow exhibits two very different time behaviors. The first is for the intramolecular redistribution as in the single chain study and the second is for intermolecular (chain-to-chain) redistribution. The timescale for intermolecular redistribution is found to be on the order of 0.2 ns at room temperature and pressure, about two orders of magnitude larger than the intramolecular timescale. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. RP SUMPTER, BG (reprint author), OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831, USA. RI Sumpter, Bobby/C-9459-2013 OI Sumpter, Bobby/0000-0001-6341-0355 NR 72 TC 6 Z9 6 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0301-0104 J9 CHEM PHYS JI Chem. Phys. PD MAR 15 PY 1992 VL 160 IS 3 BP 393 EP 403 DI 10.1016/0301-0104(92)80006-H PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HH324 UT WOS:A1992HH32400006 ER PT J AU BAILEY, IL BERMAN, SM JACOBS, RJ BULLIMORE, MA GANDHI, N GREENHOUSE, DS AF BAILEY, IL BERMAN, SM JACOBS, RJ BULLIMORE, MA GANDHI, N GREENHOUSE, DS TI OBJECTIVE AND SUBJECTIVE ASSESSMENT OF DISCOMFORT GLARE SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,SCH OPTOMETRY,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV AUCKLAND,DEPT OPTOMETRY,AUCKLAND,NEW ZEALAND. NR 0 TC 0 Z9 0 U1 0 U2 1 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD MAR 15 PY 1992 VL 33 IS 4 BP 966 EP 966 PG 1 WC Ophthalmology SC Ophthalmology GA HK135 UT WOS:A1992HK13501367 ER PT J AU TAO, F KHORRAMI, A MEDVEDOVSKY, C DAVID, J BROGLIO, T POWERSRISIUS, P ALPEN, EL WORGUL, BV AF TAO, F KHORRAMI, A MEDVEDOVSKY, C DAVID, J BROGLIO, T POWERSRISIUS, P ALPEN, EL WORGUL, BV TI EFFECTS OF HEAVY-IONS ON CELLULAR-PARAMETERS IN THE LENS SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 COLUMBIA UNIV,NEW YORK,NY 10027. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD MAR 15 PY 1992 VL 33 IS 4 BP 1170 EP 1170 PG 1 WC Ophthalmology SC Ophthalmology GA HK135 UT WOS:A1992HK13502396 ER PT J AU MARCH, G PACKER, S CODERRE, J SVITRA, P GURZENDA, E HANSROTE, J AF MARCH, G PACKER, S CODERRE, J SVITRA, P GURZENDA, E HANSROTE, J TI BORON NEUTRON-CAPTURE THERAPY OF CHOROIDAL MELANOMA SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. CORNELL UNIV,N SHORE UNIV HOSP,COLL MED,DEPT OPHTHALMOL,MANHASSET,NY 11030. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD MAR 15 PY 1992 VL 33 IS 4 BP 1253 EP 1253 PG 1 WC Ophthalmology SC Ophthalmology GA HK135 UT WOS:A1992HK13502798 ER PT J AU VERGHESE, S RICHARDS, PL CHAR, K FORK, DK GEBALLE, TH AF VERGHESE, S RICHARDS, PL CHAR, K FORK, DK GEBALLE, TH TI FEASIBILITY OF INFRARED IMAGING ARRAYS USING HIGH-TC SUPERCONDUCTING BOLOMETERS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID YBA2CU3O7 THIN-FILMS; OPTICAL-RESPONSE; DETECTORS; MICROBOLOMETER; FLUCTUATIONS; RESISTANCE; NOISE; SI AB The design of high-T(c) superconducting bolometers for applications such as infrared imaging arrays is discussed. The dependence of bolometer sensitivity on excess voltage noise in the thermometer is a function of the detector area and thus of the wavelength to be detected. Measurements of the voltage noise in thin films of YBa2Cu3O7-delta on Si, Si3N4, and sapphire substrates are used to predict the performance of different bolometer architectures. Useful opportunities exist for bolometers made on both Si and Si3N4 membranes. A readout scheme for two-dimensional arrays of bolometers is also described in which real-time signal integration is performed on the chip. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. CONDUCTUS INC,SUNNYVALE,CA 94086. XEROX CORP,PALO ALTO RES CTR,PALO ALTO,CA 94304. STANFORD UNIV,DEPT APPL PHYS,STANFORD,CA 94305. RP VERGHESE, S (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 44 TC 46 Z9 46 U1 0 U2 5 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAR 15 PY 1992 VL 71 IS 6 BP 2491 EP 2498 DI 10.1063/1.351063 PG 8 WC Physics, Applied SC Physics GA HJ655 UT WOS:A1992HJ65500001 ER PT J AU MONAZAM, ER MALONEY, DJ AF MONAZAM, ER MALONEY, DJ TI TEMPERATURE TRANSIENTS ASSOCIATED WITH PULSED HEATING OF SINGLE PARTICLES SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID ELECTRODYNAMIC BALANCE; THERMAL-CONDUCTIVITY; AEROSOL-PARTICLE; THIN-FILMS; COAL; COMBUSTION; SIZE; MASS AB The transient thermal response of a single spherical particle in a cold quiescent gas is considered when the particle is heated by a sequence of well-characterized radiation pulses. The equations describing particle heating and cooling are formulated and a numerical solution is presented. The sensitivity of particle temperature as a function of heating pulse, particle, and gas properties is illustrated. Measured temperature histories of single particles suspended in an electrodynamic balance and pulse heated with a CO2 laser are presented in support of the analysis. The combination of unique state of the art instrumentation with the heat transfer analysis described results in a powerful new method for characterizing thermophysical properties of materials such as heat capacity and absorptivity. C1 US DOE,MORGANTOWN ENERGY TECHNOL CTR,POB 880,MORGANTOWN,WV 26507. NR 26 TC 9 Z9 9 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAR 15 PY 1992 VL 71 IS 6 BP 2552 EP 2559 DI 10.1063/1.351071 PG 8 WC Physics, Applied SC Physics GA HJ655 UT WOS:A1992HJ65500011 ER PT J AU DESNICA, UV WAGNER, J HAYNES, TE HOLLAND, OW AF DESNICA, UV WAGNER, J HAYNES, TE HOLLAND, OW TI RAMAN AND ION CHANNELING ANALYSIS OF DAMAGE IN ION-IMPLANTED GAAS - DEPENDENCE ON ION DOSE AND DOSE-RATE SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID SPECTRA AB Raman scattering and ion channeling techniques were used to investigate the damage in GaAs implanted at room temperature with 100-keV Si+ ions. The ion-induced damage was analyzed for different ion doses and dose rates (current densities). The development of different damage components was monitored by comparing a Raman signal which is specific to amorphization in GaAs to ion channeling results which are sensitive to small-volume crystalline defects, as well as to amorphous regions. Raman analysis showed that the rate of growth of the amorphous fraction with implant dose was comparable to the growth rate of the total damage as determined by ion channeling. However, while Raman analysis indicated a weak dependence of damage on dose rate, the ion channeling results showed a substantially stronger dependence. These results demonstrate that the damage morphology in GaAs is dependent upon both dose and dose rate, and that the dose-rate-dependent component of the total damage consists primarily of crystalline defects. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. FRAUNHOFER INST APPL SOLID STATE PHYS,W-7800 FREIBURG,GERMANY. RP DESNICA, UV (reprint author), RUDJER BOSKOVIC INST,YU-41000 ZAGREB,YUGOSLAVIA. RI Haynes, Tony/P-8932-2015 OI Haynes, Tony/0000-0003-2871-4745 NR 12 TC 20 Z9 20 U1 1 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAR 15 PY 1992 VL 71 IS 6 BP 2591 EP 2595 DI 10.1063/1.351077 PG 5 WC Physics, Applied SC Physics GA HJ655 UT WOS:A1992HJ65500017 ER PT J AU XIA, W PAPPERT, SA ZHU, B CLAWSON, AR YU, PKL LAU, SS POKER, DB WHITE, CW SCHWARZ, SA AF XIA, W PAPPERT, SA ZHU, B CLAWSON, AR YU, PKL LAU, SS POKER, DB WHITE, CW SCHWARZ, SA TI ION MIXING OF III-V-COMPOUND SEMICONDUCTOR LAYERED STRUCTURES SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID GAAS SUPER-LATTICE; QUANTUM-WELL STRUCTURES; ZN DIFFUSION; HETEROSTRUCTURE LASERS; IMPURITY DIFFUSION; ALAS SUPERLATTICES; ALGAAS INTERFACES; X-RAY; IMPLANTATION; SILICON AB Compositional disordering of III-V compound superlattice structures has received considerable attention recently due to its potential application for photonic devices. The conventional method to induce compositional disorder in a layered structure is to implant a moderate dose of impurity ions (approximately 10(15)/cm2) into the structure at room temperature, followed by a high-temperature annealing step (this process is referred to as IA here). Ion irradiation at room temperature alone does not cause any significant intermixing of layers. The subsequent high-temperature annealing step tends to restrict device processing flexibility. Ion mixing (IM) is capable of enhancing compositional disordering of layers at a rate which increases exponentially with the ion irradiation temperature. As a processing technique to planarize devices, ion mixing appears to be an attractive technology. In this work, we investigate compositional disordering in the AlGaAs/GaAs and the InGaAs/InP systems using ion mixing. We found that the ion mixing behavior of these two systems shows a thermally activated regime as well as an athermal regime, similar to that observed for metal-metal and metal-semiconductor systems. Ion mixing is observed to induce compositional disordering at significantly lower temperatures than that for the IA process. We have compared the two processes in terms of five parameters: (1) irradiation temperature, (2) dose dependence, (3) dose rate dependence, (4) annealing, and (5) ion dependence (including electrical effects and mass dependence). We found that the IM process is more efficient in utilizing the defects generated by ion irradiation to cause disordering. Both the physical mechanism of ion mixing and possible device implications will be discussed. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. BELLCORE,RED BANK,NJ 07701. RP XIA, W (reprint author), UNIV CALIF SAN DIEGO,DEPT ELECT & COMP ENGN,LA JOLLA,CA 92093, USA. NR 54 TC 18 Z9 23 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAR 15 PY 1992 VL 71 IS 6 BP 2602 EP 2610 DI 10.1063/1.351079 PG 9 WC Physics, Applied SC Physics GA HJ655 UT WOS:A1992HJ65500019 ER PT J AU JACOBSEN, C HOWELLS, MR AF JACOBSEN, C HOWELLS, MR TI A TECHNIQUE FOR PROJECTION X-RAY-LITHOGRAPHY USING COMPUTER-GENERATED HOLOGRAMS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID IMAGE-RECONSTRUCTION AB X-ray projection lithography has recently been explored as a method for the manufacture of < 200 nm linewidth integrated circuits. A method is described whereby projected lithographic images can be formed with x rays by means of a transmission hologram. The form of the hologram is computed by an algorithm that eliminates the unwanted signals normally present as systematic errors in in-line holographic images. Example calculations are shown in which holograms are constructed to generate images of a given test pattern. The holographic images are shown to have excellent fidelity with respect to both resolution and contrast. Such an approach to projection x-ray lithography requires an x-ray beam with very little coherence and is thus compatible with high wafer throughput schemes; in addition, image fidelity remains high even when moderately small contaminant particles block the light from small regions of the hologram. Fabrication limits for the single optic involved are compatible with current technological limits. The approach is applicable over a large range of soft-x-ray wavelengths, indicating the feasibility of a 100 nm resolution system with 6-mu-m depth of field using a carbon mask system operating at 5 nm, or other materials at shorter wavelengths. C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, ADV LIGHT SOURCE, BERKELEY, CA 94720 USA. RP SUNY STONY BROOK, DEPT PHYS, STONY BROOK, NY 11794 USA. RI Jacobsen, Chris/E-2827-2015 OI Jacobsen, Chris/0000-0001-8562-0353 NR 27 TC 13 Z9 13 U1 0 U2 0 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 MAR 15 PY 1992 VL 71 IS 6 BP 2993 EP 3001 DI 10.1063/1.351003 PG 9 WC Physics, Applied SC Physics GA HJ655 UT WOS:A1992HJ65500080 ER PT J AU FORD, VA STRINGER, C KENNEL, SJ AF FORD, VA STRINGER, C KENNEL, SJ TI THROMBOMODULIN IS PREFERENTIALLY EXPRESSED IN BALB-C LUNG MICROVESSELS SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID MONOCLONAL-ANTIBODY ASSAY; HUMAN-PLACENTA; PROTEIN-C; NATURAL ANTICOAGULANT; FACTOR-V; THROMBIN; ENDOTHELIUM; ANTIGEN; LOCALIZATION; ACTIVATION AB Previously, two rat monoclonal antibodies where developed which bind distinct epitopes on a murine glycoprotein, P112, which is expressed primarily in lung capillary endothelium. In this paper we show that P112 is identical to the endothelial anticoagulant protein, thrombomodulin (TM). Several lines of evidence support this conclusion. First, amino acid analysis of P112 shows a high degree of homology to TM, and both molecules exhibit the same mobility in gel electrophoresis. Second, P112 and TM share reactivity for two different monoclonal antibodies. Third, purified P112, like TM, acts as a cofactor for protein C activation. Finally, two cDNA clones identified with P112 polyclonal antiserum contain sequence identity with the known TM cDNA sequence. Quantitative analysis of TM (P112) expression using a two-site monoclonal antibody assay demonstrates that significantly higher levels of TM are found in lung in comparison with other highly vascularized organs, i.e. the kidney and liver. Quantitative Northern blot data coincides with the two-site assay data and demonstrates that the high level of TM expression in lung is not due to preferential binding of the monoclonal antibodies to lung TM but rather to increased production of TM mRNA in the lung relative to other highly vascularized organs. It is suggested that expression of TM is highest in cells from continuous endothelium. C1 OAK RIDGE NATL LAB,DIV BIOL SCI,OAK RIDGE,TN 37831. UNIV TENNESSEE,OAK RIDGE GRAD SCH BIOMED SCI,OAK RIDGE,TN 37831. FU NCI NIH HHS [CA 09104] NR 43 TC 42 Z9 43 U1 0 U2 0 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD MAR 15 PY 1992 VL 267 IS 8 BP 5446 EP 5450 PG 5 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA HH747 UT WOS:A1992HH74700068 PM 1372003 ER PT J AU KIM, BS HUNTER, PL JOHNSTON, HS AF KIM, BS HUNTER, PL JOHNSTON, HS TI NO3 RADICAL STUDIED BY LASER-INDUCED FLUORESCENCE SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID VIBRATIONAL-SPECTRA; ABINITIO; STATE; BAND; SPECTROSCOPY; GEOMETRY AB The fluorescence emission spectra of NO3 excited at 14 742, 15 109, 15 882, 16 053, and 16 555 cm-1 are reported. On the basis of fundamentals, overtones, and combination of five vibrational frequencies (368, 753, 1053, 1500, and 2010 cm-1) we assign 18 out of 20 observed bands. The fluorescence bands exhibit two different shapes, one shows a sharp spike overlapped with a broadband, and the other shows a broadband only. From the literature we obtain a potential-energy surface that has D3h symmetry with three identical shallow minima, each representative of a local C2-upsilon structure and located with threefold symmetry around the central axis. Such a potential-energy function can split degenerate D3h vibrational modes, giving "pseudorotations," as a structure with one long and two short bonds permutes around the three minima. On the time scale of molecular rotations, vibrational motions average over the three local C2-upsilon structures to give D3h structure and rotational spectra. This model qualitatively explains both the five fundamental frequencies observed by fluorescence and the definite D3h properties of high-resolution infrared spectra. We suggest that a molecular theoretical model with fine spatial resolution sees the miniwells and reports C2-upsilon as minimum-energy structure, but a model with less fine resolution overlooks the three shallow minima and reports the larger-scale D3h structure. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RP KIM, BS (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. RI kim, Bongsoo/E-4808-2012; Kim, Bongsoo/C-1545-2011 NR 24 TC 34 Z9 34 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAR 15 PY 1992 VL 96 IS 6 BP 4057 EP 4067 DI 10.1063/1.461861 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HK019 UT WOS:A1992HK01900001 ER PT J AU KRAUSE, JL KULANDER, KC LIGHT, JC OREL, AE AF KRAUSE, JL KULANDER, KC LIGHT, JC OREL, AE TI QUANTUM-MECHANICAL CALCULATIONS OF THE DISSOCIATION OF H-3 RYDBERG STATES SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID TRIATOMIC HYDROGEN; MOLECULAR PHOTOFRAGMENTATION; VIBRATIONAL FREQUENCIES; ABINITIO CALCULATION; BOUND-STATES; WAVE PACKET; SCATTERING; DYNAMICS; SURFACES; PHOTODISSOCIATION AB We present three-dimensional, time-dependent quantum-mechanical calculations of the dynamics of the dissociation of H-3 Rydberg states at total energies up to 6 eV. The method used in this work employs a Chebychev propagator in time, and computes the kinetic-energy operators in the discrete variable representation. We calculate the total dissociation cross section, as well as partial vibrational and rotational cross sections, and compare our results to previous two-dimensional calculations and to experiment. The results display clear three-dimensional effects, and indicate the importance of including both sheets of the H-3 ground potential-energy surface in the dynamics. C1 UNIV CALIFORNIA DAVIS,DEPT APPL SCI,LIVERMORE,CA 94550. UNIV CHICAGO,DEPT CHEM,CHICAGO,IL 60637. UNIV CHICAGO,JAMES FRANCK INST,CHICAGO,IL 60637. RP KRAUSE, JL (reprint author), UNIV CALIF LAWRENCE LIVERMORE NATL LAB,THEORET ATOM & MOLEC PHYS GRP,LIVERMORE,CA 94550, USA. NR 45 TC 29 Z9 29 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAR 15 PY 1992 VL 96 IS 6 BP 4283 EP 4292 DI 10.1063/1.462822 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HK019 UT WOS:A1992HK01900026 ER PT J AU ALFORD, WJ AF ALFORD, WJ TI STATE-TO-STATE RATE CONSTANTS FOR QUENCHING OF XENON 6P LEVELS BY RARE-GASES SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID DEACTIVATION RATE CONSTANTS; COLLISIONAL DEACTIVATION; RADIATIVE LIFETIMES; EXCITED XENON; ATOMIC XENON; 5P5 6P; LASER; AR; XE AB State-to-state rate constants have been measured for xenon 6p[3/2]1,2, 6p[5/2]2,3, 6p[1/2]1, and 6s'[1/2]1 levels quenched by helium, neon, argon, and xenon. Some total rate constants and 6p radiative transition probabilities have also been measured. The time-dependent fluorescence from pumped and collisionally populated levels following pulsed excitation of a single level is observed. Data for different gas pressures are fit using a rate equation model that includes all relevant levels. Neon is found to have small total rate constants, while xenon has large total rate constants. Both neon and xenon quench to a number of nearby levels. Helium and argon have total rate constants varying greatly with 6p level. Helium tends to quench to the next lower level while argon usually quenches to many levels. RP ALFORD, WJ (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 25 TC 67 Z9 67 U1 0 U2 5 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAR 15 PY 1992 VL 96 IS 6 BP 4330 EP 4340 DI 10.1063/1.462862 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HK019 UT WOS:A1992HK01900031 ER PT J AU CHANG, YT MINICHINO, C MILLER, WH AF CHANG, YT MINICHINO, C MILLER, WH TI CLASSICAL TRAJECTORY STUDIES OF THE MOLECULAR DISSOCIATION DYNAMICS OF FORMALDEHYDE - H2CO-]H-2+CO SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID POTENTIAL-ENERGY SURFACES; QUANTUM-STATE CORRELATIONS; ANGULAR-MOMENTUM VECTORS; PHOTO-DISSOCIATION; PHOTODISSOCIATION DYNAMICS; ROTATIONAL DISTRIBUTIONS; VIBRATIONAL-RELAXATION; ABINITIO CALCULATION; TRANSITION-STATE; RECOIL VELOCITY AB Classical trajectory calculations have been carried out to simulate the unimolecular decomposition of formaldehyde in the ground electronic state (S0). Global potential-energy surfaces were constructed using the empirical valence-bond (EVB) approach. Two sets of ab initio input were used to characterize two different EVB potential-energy surfaces, and trajectory calculations using one of these gives excellent agreement with experimental data for the product-state distributions of H-2 and CO. The trajectory study of vector correlations with prompt dissociation of the parent molecule provides understanding of the dissociation dynamics in the molecular frame. From comparison with some of the experimental results and information from a few ab initio calculations, some improvements for the current potential surfaces are suggested. C1 UNIV BASILICATA,DIPARTIMENTO CHIM,I-85100 POTENZA,ITALY. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP CHANG, YT (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. NR 51 TC 81 Z9 81 U1 2 U2 10 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAR 15 PY 1992 VL 96 IS 6 BP 4341 EP 4355 DI 10.1063/1.462826 PG 15 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HK019 UT WOS:A1992HK01900032 ER PT J AU SCHWARK, DW VEZIE, DL REFFNER, JR THOMAS, EL ANNIS, BK AF SCHWARK, DW VEZIE, DL REFFNER, JR THOMAS, EL ANNIS, BK TI CHARACTERIZATION OF THE SURFACE-MORPHOLOGY OF DIBLOCK COPOLYMERS VIA LOW-VOLTAGE, HIGH-RESOLUTION SCANNING ELECTRON-MICROSCOPY AND ATOMIC FORCE MICROSCOPY SO JOURNAL OF MATERIALS SCIENCE LETTERS LA English DT Article ID BLOCK COPOLYMERS; MICRODOMAINS; POLYMERS; FILMS C1 OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831. RP SCHWARK, DW (reprint author), MIT,DEPT MAT SCI & ENGN,CAMBRIDGE,MA 02139, USA. NR 15 TC 41 Z9 41 U1 0 U2 2 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0261-8028 J9 J MATER SCI LETT JI J. Mater. Sci. Lett. PD MAR 15 PY 1992 VL 11 IS 6 BP 352 EP 355 DI 10.1007/BF00729180 PG 4 WC Materials Science, Multidisciplinary SC Materials Science GA HK025 UT WOS:A1992HK02500016 ER PT J AU BOWNDS, JM RIZK, TA AF BOWNDS, JM RIZK, TA TI THE INVERSE LAPLACE TRANSFORM OF AN EXACT ANALYTICAL SOLUTION FOR A BVP IN GROUNDWATER THEORY SO JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS LA English DT Article C1 N CAROLINA STATE UNIV,RALEIGH,NC 27607. RP BOWNDS, JM (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 9 TC 1 Z9 1 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0022-247X J9 J MATH ANAL APPL JI J. Math. Anal. Appl. PD MAR 15 PY 1992 VL 165 IS 1 BP 144 EP 155 DI 10.1016/0022-247X(92)90072-L PG 12 WC Mathematics, Applied; Mathematics SC Mathematics GA HH494 UT WOS:A1992HH49400008 ER PT J AU BARLOW, DB KRAUS, RH LOBB, CT MENZEL, MT WALSTROM, PL AF BARLOW, DB KRAUS, RH LOBB, CT MENZEL, MT WALSTROM, PL TI COMPACT HIGH-FIELD SUPERCONDUCTING QUADRUPOLE MAGNET WITH HOLMIUM POLES SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB A compact high-field superconducting quadrupole magnet was designed and built with poles made of the rare-earth metal holmium. The magnet is intended for use in superconducting coupled-cavity linear accelerators where compact high-field quadrupoles are needed, but where the use of permanent magnets is ruled out because of trapped-flux losses. The magnet has a clear bore diameter of 1.8 cm, outside diameter of 11 cm, length of 11 cm, and pole tip length of 6 cm. The effect of using holmium. a material with a higher saturation field than iron, was investigated by replacing poles made of iron with identical poles made of holmium. The magnet was operated at a temperature of 4.2 K and reached a peak quadrupole field gradient of 355 T/m, a 10% increase over the same magnet with iron poles. This increase in performance is consistent with calculations based on B - H curves that were measured for holmium at 4.2 K. C1 GRUMMAN SPACE SYST LOS ALAMOS,LOS ALAMOS,NM 87545. RP BARLOW, DB (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. NR 4 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 15 PY 1992 VL 313 IS 3 BP 311 EP 314 DI 10.1016/0168-9002(92)90805-E PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HL486 UT WOS:A1992HL48600001 ER PT J AU KRISHNAGOPAL, S SIEMANN, R AF KRISHNAGOPAL, S SIEMANN, R TI SOME ASPECTS OF THE 2 BEAM PERFORMANCE OF DCI SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID LUMINOSITY AB The results of beam-beam simulations that model DCI operating as an e+e- collider are reported. The simulation techniques, including a new procedure for incorporating synchrotron radiation, are described. Phase advance errors between the interaction points explain the beam-beam limit at the operating point q(x) = q(y) = 0.725 (q denotes the fractional part of the tune). The effects of radiation damping are also studied near that operating point. Simulation and experiments disagree in a second operating region, q(x) = q(y) approximately 0.795, indicating additional physics outside the scope of our model. C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. RP KRISHNAGOPAL, S (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 26 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 15 PY 1992 VL 313 IS 3 BP 328 EP 336 DI 10.1016/0168-9002(92)90807-G PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HL486 UT WOS:A1992HL48600003 ER PT J AU BYRD, RC MCGAUGHEY, PL SAILOR, WC HAMMOCK, RC YARIV, Y AF BYRD, RC MCGAUGHEY, PL SAILOR, WC HAMMOCK, RC YARIV, Y TI MEASUREMENTS AND CALCULATIONS OF THE PERFORMANCE OF A MULTIELEMENT NEUTRON DETECTOR SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID SCINTILLATION-COUNTERS; DETECTION EFFICIENCY; ENERGIES; CALIBRATION AB Large, multi-element scintillation detectors are increasingly being used in neutron experiments, particularly at medium energies, to provide the coincidence requirements needed for kinematic constraints and background rejection. These arrays involve specialized techniques for event processing and calibration, and their development has created the need for new simulation programs. We describe the design and testing of such a program, including detailed discussions of procedures for event reconstruction, detector calibration, and resolution measurements for segmented detectors. The discussions are illustrated using a prototype array composed of three 51 x 16 x 4 cm3 planes, each consisting of four scintillator bars 51 cm in length. Comparisons are made to measurements obtained with tagged beams of neutrons and protons at energies of 100-200 MeV. Very good agreement is obtained for efficiencies, resolutions, energy losses, inter-element velocities, and angular distributions. The results allow detailed analyses of the effect of charge-particle vetos and the assumptions about carbon breakup reactions in organic scintillators. C1 SOREQ NUCL RES CTR,DIV APPL RADIAT TECHNOL,IL-70600 YAVNE,ISRAEL. RP BYRD, RC (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. NR 30 TC 14 Z9 14 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 MAR 15 PY 1992 VL 313 IS 3 BP 437 EP 451 DI 10.1016/0168-9002(92)90822-L PG 15 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HL486 UT WOS:A1992HL48600018 ER PT J AU AMIAN, WB MEIER, MM BYRD, RC GOULDING, CA MORGAN, GL MOSS, CE AF AMIAN, WB MEIER, MM BYRD, RC GOULDING, CA MORGAN, GL MOSS, CE TI EFFICIENCY CALIBRATION OF A CYLINDRICAL BC418 NEUTRON DETECTOR AT NEUTRON ENERGIES BETWEEN 135 AND 800 MEV SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID CROSS-SECTIONS; MEV PROTONS; SCINTILLATORS; SYSTEMATICS; TARGETS AB The neutron detection efficiency of a cylindrical (5.08 cm diameter by 5.08 cm long) BC418 detector has been measured for neutrons at 780 MeV, using the time-of-flight technique to identify the transitions to the ground and first excited states in the Li-7(p, n01)Be-7 reaction at 0-degrees. For energies between 135 and 800 MeV, an energy-dependent efficiency was also derived using published values of the zero-degree differential cross section for the Pb(p, n) reaction. Differences between the two approaches point to inconsistencies between the Li-7(p, n) and Pb(p, n) cross-section data. A comparison with predictions from a standard Monte Carlo code is given. For reference, also given are the attenuation length for 800 MeV neutrons in heavy concrete shielding and the total cross section in iron for neutrons from 110-725 MeV. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP AMIAN, WB (reprint author), FORSCHUNGSZENTRUM JULICH GMBH,W-5170 JULICH,GERMANY. NR 18 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 15 PY 1992 VL 313 IS 3 BP 452 EP 456 DI 10.1016/0168-9002(92)90823-M PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HL486 UT WOS:A1992HL48600019 ER PT J AU BYRD, RC SAILOR, WC YARIV, Y CAREY, TA GAVRON, A AF BYRD, RC SAILOR, WC YARIV, Y CAREY, TA GAVRON, A TI MEASUREMENTS AND CALCULATIONS OF THE GAMMA RESPONSE OF NEUTRON SCINTILLATORS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID ORGANIC SCINTILLATORS; DETECTOR; CALIBRATION; COUNTERS; NE-213; EFFICIENCY; ENERGIES AB By adapting routines from existing simulation programs for the interaction of neutrons and gammas with organic scintillators, a code has been produced to calculate the response of multi-element detectors to neutrons below 200 MeV and gammas below 10 MeV. The approach for the gamma calculations is similar to the macroscopic model used for neutron interactions. To test the approximations concerning gamma multiple-scattering and electron range-energy relations, measurements were made for the response of plastic scintillators to gammas at energies up to 1.3 MeV. The measurements focus on count rates and light-output distributions, and their analysis includes discussions of energy-to-light conversion and detector resolution. All measurements and calculations are in good agreement. The conclusions are discussed in terms of calculations of detection efficiencies for neutrons at energies of 1-200 MeV. C1 SOREQ NUCL RES CTR,DIV APPL RADIAT TECHNOL,IL-70600 YAVNE,ISRAEL. RP BYRD, RC (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. NR 21 TC 4 Z9 4 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 15 PY 1992 VL 313 IS 3 BP 457 EP 463 DI 10.1016/0168-9002(92)90824-N PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HL486 UT WOS:A1992HL48600020 ER PT J AU LU, MS TEICHMANN, T AF LU, MS TEICHMANN, T TI A GENERALIZED-MODEL FOR NEUTRON COINCIDENCE COUNTING SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB A generalized model for neutron coincidence counting is developed, based on the use of a dual probability generating function, introduced here. The model, which takes explicit account of neutron absorption and leakage, and gives a clear picture of the underlying processes involved, is an extension of the formalism of Bohnel [Nucl. Sci. Eng. 90 (1985) 75] and Hage and Cifarelli [Nucl. Instr. and Meth. A236 (1985) 165]. Applications include active and passive neutron coincidence counting in standard configurations and in forked counters. Extensions to more complex situations are also suggested. RP LU, MS (reprint author), BROOKHAVEN NATL LAB,TECH SUPPORT ORG,UPTON,NY 11973, USA. NR 12 TC 7 Z9 7 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 MAR 15 PY 1992 VL 313 IS 3 BP 471 EP 476 DI 10.1016/0168-9002(92)90826-P PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HL486 UT WOS:A1992HL48600022 ER PT J AU GARNETT, RW BURLESON, GR AF GARNETT, RW BURLESON, GR TI A SIMPLE 3-DIMENSIONAL MAGNETIC-FIELD INTERPOLATION TECHNIQUE SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB A simple technique based on the least-squares method for interpolating a magnetic field in three-dimensions is discussed. The technique has been used successfully in a Monte Carlo model for a neutron-proton elastic scattering experiment performed at the Los Alamos meson physics facility. Results from this model are given as an example. Some of the methods should be useful in other applications in which it is necessary to generate a smooth function that is constrained to pass through a set of measured points. C1 NEW MEXICO STATE UNIV,DEPT PHYS,LAS CRUCES,NM 88003. RP GARNETT, RW (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV ACCELERATOR TECHNOL,LOS ALAMOS,NM 87545, USA. NR 7 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 15 PY 1992 VL 313 IS 3 BP 501 EP 505 DI 10.1016/0168-9002(92)90830-W PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA HL486 UT WOS:A1992HL48600026 ER PT J AU SMEDSKJAER, LC BANSIL, A WELP, U FANG, Y BAILEY, KG AF SMEDSKJAER, LC BANSIL, A WELP, U FANG, Y BAILEY, KG TI A TEMPERATURE-DEPENDENT 2D-ACAR STUDY OF UNTWINNED METALLIC YBA2CU3O7-X SO PHYSICA C LA English DT Article ID POSITRON-ANNIHILATION; FERMI-SURFACE; ELECTRONIC-STRUCTURE; MOMENTUM DENSITY; 2D ACAR; SUPERCONDUCTIVITY AB We have carried out 2D-ACAR measurements in the c-axis projection on an untwinned single crystal of YBa2Cu3O7-x as a function of temperature, for five temperatures ranging from 30 K to 300 K. These temperature dependent 2D-ACAR spectra can be approximated by a superposition of two temperature independent spectra with temperature dependent weighting factors. We discuss how the temperature dependence of the data can be exploited to obtain a "background corrected" experimental spectrum, which is found to be in remarkable accord with the corresponding band theory based predictions, including for the first time the overall amplitude of the anisotropy in the 2D-ACAR. The corrected data also shows clear signatures of the ridge Fermi surface and an indication of the pillbox surface. C1 ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCONDUCT,ARGONNE,IL 60439. NORTHEASTERN UNIV,DEPT PHYS,BOSTON,MA 02115. RP SMEDSKJAER, LC (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 35 TC 36 Z9 36 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 MAR 15 PY 1992 VL 192 IS 3-4 BP 259 EP 271 DI 10.1016/0921-4534(92)90830-6 PG 13 WC Physics, Applied SC Physics GA HM225 UT WOS:A1992HM22500001 ER PT J AU MCCARTY, KF LIU, JZ JIA, YX SHELTON, RN RADOUSKY, HB AF MCCARTY, KF LIU, JZ JIA, YX SHELTON, RN RADOUSKY, HB TI COMPARISON OF THE RAMAN-ACTIVE PHONONS OF YBA2CU3O7 CRYSTALS GROWN IN GOLD AND ZIRCONIA CRUCIBLES SO PHYSICA C LA English DT Article ID SINGLE-CRYSTALS; TEMPERATURE-DEPENDENCE; OXYGEN STOICHIOMETRY; SUPERCONDUCTING GAP; SCATTERING; RBA2CU3O7-DELTA; POLARIZATION; ANISOTROPY; TRANSITION; SPECTRUM AB Three single-domain crystals of YBa2Cu3O7 grown in either gold or zirconia crucibles have been studied by Raman scattering. Two of the crystals were annealed and mechanically detwinned after growth, while the third was only detwinned. There are crystal-to-crystal variations in the absolute values of the phonon line widths. However, the line widths of the A(g) phonons exhibit nearly the same temperature trends in the three crystals. Below T(c), the phonons at 340, 440 and 500 cm-1 sharpen dramatically, sharpen slightly, and broaden, respectively. When interpreted within the framework of conventional theories of superconductivity, the line-width behavior supports a superconducting energy gap 2DELTA between 440 and 500 cm-1 (2DELTA = 6.8-7.7 k(B)T(c)). The line shapes of the 120, 150, 340 and 500 cm-1 phonons can be asymmetric. Only the 500 cm-1 phonon becomes less symmetric below T(c). The intensities of the A(g) phonons vary little with temperature below T(c). Raman peaks, possibly defect modes, are observed at approximately 232 cm-1 and approximately 143 cm-1 in the as-grown crystal, but not in annealed crystals. The frequency of the approximately 143 cm-1 peak largely decreases with decreasing temperature, opposite of the behavior found for the adjacent A(g) phonons. In addition, the temperature dependence of the B2g and B3g phonons of gold-grown YBa2Cu3O7 has been studied. For the most part, the frequency behavior is not remarkable. In gold-grown YBa2Cu3O7, the line widths of 11 phonons from about 70 to 500 cm-1 have been measured above and below T(c). Only the phonon at 500 cm-1 is found to broaden below T(c). C1 UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP MCCARTY, KF (reprint author), SANDIA NATL LABS,LIVERMORE,CA 94551, USA. RI McCarty, Kevin/F-9368-2012 OI McCarty, Kevin/0000-0002-8601-079X NR 44 TC 21 Z9 21 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 MAR 15 PY 1992 VL 192 IS 3-4 BP 331 EP 350 DI 10.1016/0921-4534(92)90839-5 PG 20 WC Physics, Applied SC Physics GA HM225 UT WOS:A1992HM22500010 ER PT J AU LUO, JS MERCHANT, N MARONI, VA GRUEN, DM TANI, BS SANDHAGE, KH CRAVEN, CA AF LUO, JS MERCHANT, N MARONI, VA GRUEN, DM TANI, BS SANDHAGE, KH CRAVEN, CA TI GROWTH OF C-AXIS-ORIENTED FILMS OF YBBA2CU3O7-DELTA ON SINGLE AND POLYCRYSTALLINE MGO SUBSTRATES BY OXIDATION OF A LIQUID ALLOY PRECURSOR SO PHYSICA C LA English DT Article ID HIGH-TC SUPERCONDUCTOR; OXIDIZATION; OXIDE; AIR AB Textured superconducting films of YbBa2Cu3O7-delta supported on both single and polycrystalline MgO substrates were prepared by oxidation of a liquid precursor alloy. The substrates were coated by dipping them into the molten alloy (YbBa2Cu3, melting point approximately 870-degrees-C). After withdrawal from the melt, the adhering metal was oxidized to the corresponding oxide phase, i.e., YbBa2Cu3O7-delta, which exhibited a superconducting transition at approximately 80 K following annealing in pure O2 at 500-degrees-C. With MgO(100) substrates, evidence was seen for the epitaxial growth of YbBa2Cu3O7-delta crystals having their c-axis parallel to the [100] direction of the substrate. For polycrystalline MgO, X-ray diffraction and microstructural examination showed that the high-T(c) crystallites in the films were also oriented with their c-axis perpendicular to the substrate surface, but the directions of the a and b axes were disordered rather than epitaxial. The superconducting properties of as-prepared films are discussed together with the effects of key processing parameters on composition and microstructure. C1 AMER SUPERCONDUCTOR CORP,WATERTOWN,MA 02172. RP LUO, JS (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 18 TC 4 Z9 4 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 MAR 15 PY 1992 VL 192 IS 3-4 BP 356 EP 361 DI 10.1016/0921-4534(92)90841-Y PG 6 WC Physics, Applied SC Physics GA HM225 UT WOS:A1992HM22500012 ER PT J AU HWANG, HY CHEONG, SW COOPER, AS RUPP, LW BATLOGG, B KWEI, GH TAN, Z AF HWANG, HY CHEONG, SW COOPER, AS RUPP, LW BATLOGG, B KWEI, GH TAN, Z TI CRYSTALLOGRAPHIC EVOLUTION, T'-]T-ASTERISK-]T, IN PR2-XSRXCUO4-DELTA SO PHYSICA C LA English DT Article ID X-RAY ABSORPTION; SUPERCONDUCTIVITY; PHASE; VALENCE; SYSTEM; SR; PR AB In our comprehensive crystallographic investigation of the quasi-binary Pr2CuO4-Sr2CuO3 system, we observe the structural evolution T' --> T* --> T --> Sr2CuO3 phase with increasing Sr substitution in Pr2-xSrxCuO4-delta, that is distinctly different from the behavior in Sr-doped La2CuO4 or Nd2CuO4. From the results of structural refinement using neutron powder diffraction and valence study from PrL3 X-ray absorption, we find that the stabilization of the T* phase in Pr1.6Sr0.4CuO4 is associated with the preferential occupation of large Sr ions in the T-type half unit cell and the presence of Pr ions in the T'-type half unit cell having an average valence larger than 3+. Furthermore, the presence of large in-plane oxygen deficiency is related to the stabilization of the T structure in Pr1.0Sr1.0CuO3.6. Formal Cu valence in the T* or T compound, deduced from an oxygen stoichiometry study using thermogravimetric analysis and neutron structural refinement, is larger than 2+; however, neither superconductivity nor metallic behavior is observed. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP HWANG, HY (reprint author), AT&T BELL LABS,MURRAY HILL,NJ 07974, USA. RI Hwang, Harold/I-6943-2012 NR 17 TC 25 Z9 25 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 MAR 15 PY 1992 VL 192 IS 3-4 BP 362 EP 371 DI 10.1016/0921-4534(92)90842-Z PG 10 WC Physics, Applied SC Physics GA HM225 UT WOS:A1992HM22500013 ER PT J AU KIRCHER, J HUMLICEK, J GARRIGA, M CARDONA, M FUCHS, D HABERMEIER, HU JEPSEN, O GOPALAN, S ANDERSEN, OK FANG, Y WELP, U VANDERVOORT, KG CRABTREE, GW AF KIRCHER, J HUMLICEK, J GARRIGA, M CARDONA, M FUCHS, D HABERMEIER, HU JEPSEN, O GOPALAN, S ANDERSEN, OK FANG, Y WELP, U VANDERVOORT, KG CRABTREE, GW TI INTERBAND-TRANSITIONS IN YBA2CU3O7 SO PHYSICA C LA English DT Article ID SINGLE-CRYSTALS; REFLECTIVITY AB Using rotating analyzer ellipsometry we have measured all three components of the dielectric tensor of YBa2Cu3O7 from the near-infrared to the vacuum-ultraviolet (0.7-24 eV). In the low-energy region the spectra for a-b polarization can be well modelled by a Drude free-carrier response with a frequency independent scattering rate. Below 10 eV we observe strongly anisotropic interband transitions involving the partially filled valence band and the conduction band. At higher energies the anisotropy becomes smaller. In that region we see two prominent double structures around 16 and 20 eV that we assign to transitions from lower-lying bands with O s and Ba p character to states close to the Fermi level. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. MASARYK UNIV,FAC SCI,DEPT SOLID STATE PHYS,CS-61137 BRNO,CZECHOSLOVAKIA. RP KIRCHER, J (reprint author), MAX PLANCK INST FESTKORPERFORSCH,HEISENBERGSTR 1,W-7000 STUTTGART 80,GERMANY. RI Humlicek, Josef/G-5245-2014; Garriga, Miquel/F-9738-2011 OI Garriga, Miquel/0000-0002-6683-0790 NR 26 TC 16 Z9 16 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 MAR 15 PY 1992 VL 192 IS 3-4 BP 473 EP 480 DI 10.1016/0921-4534(92)90856-8 PG 8 WC Physics, Applied SC Physics GA HM225 UT WOS:A1992HM22500027 ER PT J AU MAINIERI, R AF MAINIERI, R TI THERMODYNAMIC-ZETA FUNCTIONS FOR ISING-MODELS WITH LONG-RANGE INTERACTIONS SO PHYSICAL REVIEW A LA English DT Article ID STRANGE SETS; KONDO PROBLEM; EXPANDING MAPS; SYSTEMS; QUANTIZATION; TEMPERATURE; ENERGY; CHAIN AB The use of cycle expansions for spin systems with long-range interactions is explored numerically. It is found that the thermodynamic zeta function is an effective tool, both in practice and in principle, for the study of Ising models with power-law interactions. To deal with phase transitions the cycle expansion is factorized, and accurate phase-transition points for several power-law models are obtained, together with other thermodynamic quantities. RP MAINIERI, R (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,MAIL STOP B258,LOS ALAMOS,NM 87545, USA. NR 35 TC 13 Z9 13 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD MAR 15 PY 1992 VL 45 IS 6 BP 3580 EP 3591 DI 10.1103/PhysRevA.45.3580 PG 12 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HK384 UT WOS:A1992HK38400028 ER PT J AU SCHARF, R SUNDARAM, B AF SCHARF, R SUNDARAM, B TI QUANTUM SIGNATURES OF HOMOCLINIC TANGLES AND SEPARATRICES SO PHYSICAL REVIEW A LA English DT Article ID ANDERSON LOCALIZATION; PERIODIC-ORBITS; WAVE-FUNCTIONS; SYSTEMS; SCARS; IONIZATION; CHAOS; TRANSFORMATION; SUPPRESSION; DYNAMICS AB The influence of homoclinic tangles and separatrices on the eigenstates and quasienergies of a quantized, nonintegrable, piecewise-linear standard map is investigated both analytically and numerically. The strength of scarring on hyperbolic fixed points is found to depend strongly on the phase-space area covered by the corresponding homoclinic tangles. It is particularly pronounced when the tangle degenerates to an unbroken separatrix and is seen to decrease with decreasing hBAR. In the case of the unbroken separatrix, an interesting resonance phenomenon, which occurs for certain values of hBAR, is also discussed. This effect is related to a degeneracy in the quasienergy differences for a triplet of states which lie energetically below, on, and above the saddle. This degeneracy is shown to give rise to periodic recurrences for a coherent state initially placed at the hyperbolic fixed point. The relevant time scale T is calculated semiclassically and exhibits the asymptotic behavior T is-proportional-to ln hBAR. The implications of these results to other systems is also discussed. C1 UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP SCHARF, R (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. RI Sundaram, Bala/A-6532-2010 OI Sundaram, Bala/0000-0002-1728-704X NR 37 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 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD MAR 15 PY 1992 VL 45 IS 6 BP 3615 EP 3628 DI 10.1103/PhysRevA.45.3615 PG 14 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HK384 UT WOS:A1992HK38400032 ER PT J AU BRAND, HR DEISSLER, RJ AF BRAND, HR DEISSLER, RJ TI ECKHAUS AND BENJAMIN-FEIR INSTABILITIES NEAR A WEAKLY INVERTED BIFURCATION SO PHYSICAL REVIEW A LA English DT Article ID GINZBURG-LANDAU EQUATION; CONVECTIVE INSTABILITY; TRAVELING WAVES; PATTERNS; SYSTEMS; MIXTURE; STATES AB We investigate how the criteria for two prototype instabilities in one-dimensional pattern-forming systems, namely for the Eckhaus instability and for the Benjamin-Feir instability, change as one goes from a continuous bifurcation to a spatially periodic or spatially and/or time-periodic state to the corresponding weakly inverted, i.e., hysteretic, cases. We also give the generalization to two-dimensional patterns in systems with anisotropy as they arise, for example, for hydrodynamic instabilities in nematic liquid crystals. C1 UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. NASA,LEWIS RES CTR,INST COMPUTAT MECH PROP,CLEVELAND,OH 44135. RP BRAND, HR (reprint author), UNIV ESSEN GESAMTHSCH,FACHBEREICH PHYS 7,W-4300 ESSEN 1,GERMANY. NR 35 TC 11 Z9 11 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD MAR 15 PY 1992 VL 45 IS 6 BP 3732 EP 3736 DI 10.1103/PhysRevA.45.3732 PG 5 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HK384 UT WOS:A1992HK38400043 ER PT J AU ABDALLAH, J CLARK, REH PEEK, JM AF ABDALLAH, J CLARK, REH PEEK, JM TI STEADY-STATE IONIZATION-BALANCE CALCULATIONS FOR A SELENIUM PLASMA SO PHYSICAL REVIEW A LA English DT Article ID X-RAY LASER; DIELECTRONIC RECOMBINATION; IONS AB A steady-state model is used to calculate the ionization balance for a selenium plasma at electron temperatures where the Ne-like stage is dominant. In this model, the ion distribution and free-electron density are calculated for a specified particle density and temperature. In addition, each state of a given ion is connected to appropriate states of the same ion by excitation and deexcitation and connected to the appropriate states of adjacent ions by ionization and recombination. Excited states including autoionizing states are treated explicitly. Rate coefficients for all processes are based consistently on atomic-structure calculations. The calculations indicate that hundreds of electron configurations are necessary to obtain suitable results and that electron configurations must be included consistently across ion stages. Autoionizing states are shown to be the major influence in determining the ionization balance. The use of plane-wave Born collision strengths instead of better distorted-wave collision strengths appears to have a negligible effect on the overall ion stage distribution at moderate densities. The results may explain why F-like lasing transitions were not observed in the experiments by Matthews et al. [Phys. Rev. Lett. 54, 110 (1985)]. RP ABDALLAH, J (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. NR 27 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 MAR 15 PY 1992 VL 45 IS 6 BP 3980 EP 3986 DI 10.1103/PhysRevA.45.3980 PG 7 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HK384 UT WOS:A1992HK38400070 ER PT J AU WHEALTON, JH MURPHY, BD RARIDON, RJ ROTHE, KE BECRAFT, WR OWENS, TL AF WHEALTON, JH MURPHY, BD RARIDON, RJ ROTHE, KE BECRAFT, WR OWENS, TL TI NONLINEAR BEAM-DYNAMICS CALCULATIONS WITH AN ILLUSTRATIVE EXAMPLE SO PHYSICAL REVIEW A LA English DT Article ID PLASMA; OPTICS AB Nonlinear beam-dynamics calculations are described that account for space-charge and image-charge effects. The calculation technique is explained and, as an illustration, is applied to two elements in an intense beam-combining funnel: an rf rebuncher and an rf deflector. For the case of the rebuncher, the calculations make use of the cylindrical symmetry of the device. For the deflector, both two-dimensional and three-dimensional calculations are performed. Emittance growth is analyzed for both the rebuncher and the deflector. For the rebuncher, a technique is proposed that considerably reduces the emittance growth. C1 GRUMMAN SPACE SYST,OAK RIDGE,TN 37831. RP WHEALTON, JH (reprint author), OAK RIDGE NATL LAB,POB 2009,OAK RIDGE,TN 37831, USA. NR 17 TC 2 Z9 2 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD MAR 15 PY 1992 VL 45 IS 6 BP 4036 EP 4044 DI 10.1103/PhysRevA.45.4036 PG 9 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HK384 UT WOS:A1992HK38400076 ER PT J AU CHEN, PS AF CHEN, PS TI LUMINOSITY ENHANCEMENT BY FOCUSING AND COLLIDING BEAMS IN A PLASMA SO PHYSICAL REVIEW A LA English DT Note ID LENS AB The potential gain of luminosity by both focusing and colliding e+e- beams in an underdense plasma is investigated. We first suggest the possibility of creating the plasma by the beam self-induced "tunneling ionization" of a gas. We then study the beam optics in the continuous focusing environment provided by the plasma, and the subsequent e+e- beam-beam interaction in the same plasma. When applied to a range of beam parameters based upon the present Stanford Linear Collider conditions, we find that a gain up to a factor of 10 in luminosity is possible. The sensitivity of various nonideal situations is discussed. RP CHEN, PS (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 15 TC 8 Z9 8 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD MAR 15 PY 1992 VL 45 IS 6 BP R3398 EP R3402 PG 5 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA HK384 UT WOS:A1992HK38400009 ER PT J AU MA, Y CHEN, CT MEIGS, G SETTE, F ILLING, G SHIGAKAWA, H AF MA, Y CHEN, CT MEIGS, G SETTE, F ILLING, G SHIGAKAWA, H TI POTASSIUM-INDUCED CHARGE REDISTRIBUTION ON SI(111) SURFACES STUDIED BY CORE-LEVEL PHOTOEMISSION SPECTROSCOPY SO PHYSICAL REVIEW B LA English DT Article ID ALKALI-METAL ADSORPTION; SCANNING TUNNELING MICROSCOPY; ELECTRONIC-STRUCTURE; STATES; CHEMISORPTION; SI(001)-(2X1); SILICON; BORON; CS AB High-resolution core-level photoemission spectra of the K/Si(111)(7 x 7) surface system are presented. The Si 2p results show that potassium adsorption induces a Si 2p core level to shift to higher binding energy, i.e., to the opposite direction than that expected from the Si-K electronegativity differences. This result is compared with that of the K/Si(111)(unroofed radical 3BAR x unroofed radical 3BAR)R 30-degrees-B system and is interpreted in terms of the K-induced charge redistribution between the Si-adatom-rest-atom pair. C1 PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. AT&T BELL LABS, MURRAY HILL, NJ 07974 USA. RUHR UNIV BOCHUM, DEPT CHEM, W-4630 BOCHUM, GERMANY. UNIV TSUKUBA, INST MAT SCI, TSUKUBA, IBARAKI 305, JAPAN. NR 30 TC 25 Z9 25 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1992 VL 45 IS 11 BP 5961 EP 5964 DI 10.1103/PhysRevB.45.5961 PG 4 WC Physics, Condensed Matter SC Physics GA HJ812 UT WOS:A1992HJ81200025 ER PT J AU SCHILDBACH, MA HAMZA, AV AF SCHILDBACH, MA HAMZA, AV TI SAPPHIRE (112BAR0) SURFACE - STRUCTURE AND LASER-INDUCED DESORPTION OF ALUMINUM SO PHYSICAL REVIEW B LA English DT Article ID KNUDSEN-LAYER FORMATION; ELECTRONIC-STRUCTURE; ALPHA-ALUMINA; BAND STRUCTURE; 111 SURFACE; THIN-FILMS; EXCITATION; EMISSION; EXCIMER; AUGER AB The laser-induced desorption of particles from a well-characterized sapphire (1120BAR) surface at laser wavelengths of 1064 nm (1.17 eV) and 355 nm (3.51 eV) was investigated by time-of-flight mass spectrometry. Below the laser ablation threshold, only aluminum ions were observed to desorb with average kinetic energies of 7.0 +/- 0.7 eV at both photon energies. The high kinetic energies of the desorbing aluminum ions indicate that the desorption mechanism is electronic. The surface atomic and electronic structure was studied with low-energy electron diffraction (LEED), reflection electron-energy-loss spectroscopy, and Auger electron spectroscopy. After heating the surface to over 1500 K, a reconstructed surface exhbiting a (12 x 4) LEED pattern was established. The electron-energy-loss spectrum from the (12 x 4) surface revealed the presence of surface electronic states in the bulk band gap of sapphire as evidenced by a broad (approximately 2 eV full width at half maximum) energy-loss feature centered at 3.6 eV. The surface electronic states are believed to participate in the photon-absorption process. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94550. RP SCHILDBACH, MA (reprint author), UNIV CALIF DAVIS,DEPT APPL SCI,LIVERMORE,CA 94550, USA. NR 54 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 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1992 VL 45 IS 11 BP 6197 EP 6206 DI 10.1103/PhysRevB.45.6197 PG 10 WC Physics, Condensed Matter SC Physics GA HJ812 UT WOS:A1992HJ81200054 ER PT J AU FROTA, HO MAHAN, GD AF FROTA, HO MAHAN, GD TI BAND TAILS AND BANDWIDTH IN SIMPLE METALS SO PHYSICAL REVIEW B LA English DT Note ID ANGLE-RESOLVED PHOTOEMISSION; ABSORPTION K-EDGE; NA; SPECTRA AB Electron-electron interactions are included in a calculation of the density of states for the homogeneous electron gas. The shift of the chemical potential is investigated from band tails and quasiparticle renormalization. These effects largely cancel, and the shift of the chemical potential is small. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. UNIV AMAZONAS,INST CIENCIAS EXATAS,DEPT FIS,BR-69068 MANAUS,BRAZIL. RP FROTA, HO (reprint author), UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996, USA. NR 25 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 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1992 VL 45 IS 11 BP 6243 EP 6246 DI 10.1103/PhysRevB.45.6243 PG 4 WC Physics, Condensed Matter SC Physics GA HJ812 UT WOS:A1992HJ81200059 ER PT J AU WEMAN, H TREACY, GM HJALMARSON, HP LAW, KK MERZ, JL GOSSARD, AC AF WEMAN, H TREACY, GM HJALMARSON, HP LAW, KK MERZ, JL GOSSARD, AC TI IMPACT IONIZATION OF EXCITONS AND DONORS IN ALXGA1-XAS/(N-TYPE GAAS)-SI QUANTUM-WELLS SO PHYSICAL REVIEW B LA English DT Note ID ELECTRIC-FIELD; LUMINESCENCE; PHOTOLUMINESCENCE; HETEROSTRUCTURES; ENERGY; EDGE AB We have investigated the effect of a parallel electric field on the low-temperature photoluminescence from AlxGa1-xAs/(n-type GaAs):Si quantum wells. We have studied the electric-field effect in a number of molecular-beam-epitaxy-grown AlxGa1-xAs/GaAs quantum-well structures doped with Si in the center of the well with well widths from 40 to 190 angstrom. We observe sharp thresholds in the quenching of luminescence from the free and bound excitons at fields near a few tens of V/cm, accompanied by a sharp increase in the current. The actual threshold is critically dependent on the well width of the sample, which is qualitatively explained by the differences in carrier mobility. The mechanism responsible for the observed effects will be shown to be due to impact ionization of the excitons by the free carriers heated in the electric field. C1 LINKOPING UNIV,DEPT PHYS & MEASUREMENT TECHNOL,S-58183 LINKOPING,SWEDEN. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. UNIV CALIF SANTA BARBARA,DEPT ELECT & COMP ENGN,SANTA BARBARA,CA 93106. UNIV CALIF SANTA BARBARA,DEPT MAT,SANTA BARBARA,CA 93106. RP WEMAN, H (reprint author), UNIV CALIF SANTA BARBARA,CTR QUANTIZED ELECTR STRUCT QUEST,SANTA BARBARA,CA 93106, USA. RI Weman, Helge/A-6245-2013 NR 22 TC 11 Z9 11 U1 2 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1992 VL 45 IS 11 BP 6263 EP 6266 DI 10.1103/PhysRevB.45.6263 PG 4 WC Physics, Condensed Matter SC Physics GA HJ812 UT WOS:A1992HJ81200064 ER PT J AU KARIMI, M MOSTOLLER, M AF KARIMI, M MOSTOLLER, M TI EMBEDDED-ATOM-METHOD STUDY OF (110) SURFACE RELAXATION AND BULK VIBRATIONS IN PB SO PHYSICAL REVIEW B LA English DT Note ID ENERGY ELECTRON-DIFFRACTION; MULTILAYER RELAXATION; OSCILLATORY RELAXATION; TRANSITION-METALS; CU(110) SURFACE; PB(110) SURFACE; ALLOYS; MODEL; NI; PHONONS AB The relaxation at the Pb(110) surface is studied using the embedded-atom method (EAM), and the predictions are compared to the very large measured changes in interplanar spacings. The EAM potentials are also used to calculate bulk phonon-dispersion curves for comparison with the anomalous phonon spectra observed for Pb by inelastic neutron scattering. In neither case does EAM give the kind of agreement with the experimental results normally found. Parallel calculations for Cu(110) and bulk Cu are presented to place the results for Pb in context. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP KARIMI, M (reprint author), ALABAMA A&M UNIV,DEPT PHYS,NORMAL,AL 35762, USA. NR 29 TC 10 Z9 10 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1992 VL 45 IS 11 BP 6289 EP 6292 DI 10.1103/PhysRevB.45.6289 PG 4 WC Physics, Condensed Matter SC Physics GA HJ812 UT WOS:A1992HJ81200071 ER PT J AU GAMMEL, JT SAXENA, A BATISTIC, I BISHOP, AR PHILLPOT, SR AF GAMMEL, JT SAXENA, A BATISTIC, I BISHOP, AR PHILLPOT, SR TI 2-BAND MODEL FOR HALOGEN-BRIDGED MIXED-VALENCE TRANSITION-METAL COMPLEXES .1. GROUND-STATE AND EXCITATION SPECTRUM SO PHYSICAL REVIEW B LA English DT Article ID N-ELECTRONS SYSTEM; PEIERLS-HUBBARD MODEL; CHARGE-TRANSFER INSTABILITY; ONE-DIMENSIONAL CRYSTALS; LINEAR-CHAIN COMPLEXES; MEAN FIELD-THEORY; RESONANCE RAMAN; PLATINUM COMPLEXES; STRUCTURAL-CHANGE; POLARONIC STATES AB We consider a 3/4-filled, two-band discrete tight-binding Peierls-Hubbard model for an isolated chain of a halogen-bridged, mixed-valence, transition-metal linear-chain complex (HMMC or MX chain). We have employed the adiabatic approximation in which the quantum fluctuations associated with phonons are implicitly treated as an external field for the electrons, and treat electron-electron effects in the Hartree-Fock approximation. We investigate ground states as functions of the model parameters and doping-induced and photoinduced excitations-kinks, polarons, bipolarons, and excitons. Results for several experimental observables, including the lattice distortion, the excess charge and spin densities of defects, and the optical absorption, are compiled. For the ground state, we find that the bond-order-wave (BOW) portion of the one-band phase diagram is eliminated from the two-band phase diagram, in agreement with the lack of real materials in the pure BOW phase. The extent of electron-hole asymmetry and of spatial localization or delocalization of defects is explored. Two separate solitons or polarons are compared with corresponding bipolarons. We demonstrate explicitly the need to employ the two-band model for a realistic modeling of the M X systems, focusing on three specific systems: (a) highly distorted, valence-localized (strongly charge-disproportionated) PtCl, (b) moderately distorted PtBr, and (c) weakly distorted, valence-delocalized (weak charge-density wave) PtI. The compilation of results reported here constitutes a reference resource against which the rapidly expanding experimental data can be compared. C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545. UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP GAMMEL, JT (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,CTR MAT SCI,LOS ALAMOS,NM 87545, USA. RI Phillpot, Simon/J-9117-2012; OI Phillpot, Simon/0000-0002-7774-6535 NR 100 TC 224 Z9 230 U1 2 U2 16 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1992 VL 45 IS 12 BP 6408 EP 6434 DI 10.1103/PhysRevB.45.6408 PG 27 WC Physics, Condensed Matter SC Physics GA HL049 UT WOS:A1992HL04900006 ER PT J AU WEBERMILBRODT, SM GAMMEL, JT BISHOP, AR LOH, EY AF WEBERMILBRODT, SM GAMMEL, JT BISHOP, AR LOH, EY TI 2-BAND MODEL FOR HALOGEN-BRIDGED MIXED-VALENCE TRANSITION-METAL COMPLEXES .2. ELECTRON-ELECTRON CORRELATIONS AND QUANTUM PHONONS SO PHYSICAL REVIEW B LA English DT Article ID PEIERLS-HUBBARD MODEL; CHARGE-TRANSFER INSTABILITY; HIGH-TC SUPERCONDUCTIVITY; LINEAR-CHAIN COMPLEXES; MEAN FIELD-THEORY; STRUCTURAL-CHANGE; FREE STATE; SYSTEM; EXCITON; SOLITON AB We study the effects of electron-electron interactions in halogen-bridged mixed-valence transition-metal linear-chain complexes (MX chains) applying a simple 3/4-filled two-band discrete tight-binding (extended) Peierls-Hubbard model with both on-site and intersite electron-phonon couplings. We employ a variety of methods: perturbation theory, Hartree-Fock approximation, and exact diagonalization in the limit of classical adiabatic phonons, and a variational approach allowing for a finite phonon frequency, i.e., quantum phonons and isotope effect. This variety of methods has proven necessary to obtain a complete picture, due to the structural richness of this model. We investigate the competition between the electron-electron and electron-phonon interactions in a wide range of parameter regimes for both ground and excited states. We focus on values relevant to the MX chains, probing the experimental variation as X and M are varied among X = Cl, Br, and I and M = Pt, Pd, and Ni (spanning electron-phonon-interaction-dominated to electron-electron-interaction-dominated materials). C1 UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. UNIV CALIF LOS ALAMOS SCI LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. UNIV CALIF LOS ALAMOS SCI LAB,DIV MAT SCI,LOS ALAMOS,NM 87545. THINKING MACHINES CORP,CAMBRIDGE,MA 02142. RP WEBERMILBRODT, SM (reprint author), UNIV BAYREUTH,INST PHYS,W-8580 BAYREUTH,GERMANY. NR 85 TC 103 Z9 104 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1992 VL 45 IS 12 BP 6435 EP 6458 DI 10.1103/PhysRevB.45.6435 PG 24 WC Physics, Condensed Matter SC Physics GA HL049 UT WOS:A1992HL04900007 ER PT J AU DELACRUZ, RM PAREJA, R GONZALEZ, R BOATNER, LA CHEN, Y AF DELACRUZ, RM PAREJA, R GONZALEZ, R BOATNER, LA CHEN, Y TI EFFECT OF THERMOCHEMICAL REDUCTION ON THE ELECTRICAL, OPTICAL-ABSORPTION, AND POSITRON-ANNIHILATION CHARACTERISTICS OF ZNO CRYSTALS SO PHYSICAL REVIEW B LA English DT Article ID VACANCIES; STATES; GAAS; MGO AB The electrical properties, optical-absorption characteristics, and position-annihilation lifetimes have been determined for nominally pure ZnO single crystals that were thermochemically reduced in Zn vapor in the temperature range between 1100 and 1500 K. Electrical-conductivity and Hall-effect measurements indicate that donors are produced as a result of the thermochemical reduction process. Additionally, optical measurements show that the reduction results in an increase in the optical absorption near the two fundamental absorption edges. Positron-annihilation studies reveal that a well-defined positron state having a lifetime of 169 +/- 2 ps exists in the reduced crystals, in contrast to the lifetime of 180 +/- 3 ps characteristic of colorless, high-resistivity as-grown crystals. The lifetime of 169 ps is attributed to positron annihilation in the bulk material. It is concluded that defects produced by thermochemical reduction of ZnO are not efficient positron traps-indicating that the defects either exist as interstitials or that they are positively charged. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP DELACRUZ, RM (reprint author), UNIV COMPLUTENSE MADRID,FAC CIENCIAS FIS,DEPT FIS MAT,E-28040 MADRID,SPAIN. RI Boatner, Lynn/I-6428-2013; OI Boatner, Lynn/0000-0002-0235-7594; CRUZ, ROSA MARIA DE LA/0000-0002-6633-1676 NR 25 TC 58 Z9 58 U1 3 U2 7 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1992 VL 45 IS 12 BP 6581 EP 6586 DI 10.1103/PhysRevB.45.6581 PG 6 WC Physics, Condensed Matter SC Physics GA HL049 UT WOS:A1992HL04900018 ER PT J AU MIN, BJ LEE, YH WANG, CZ CHAN, CT HO, KM AF MIN, BJ LEE, YH WANG, CZ CHAN, CT HO, KM TI TIGHT-BINDING MODEL FOR HYDROGEN-SILICON INTERACTIONS SO PHYSICAL REVIEW B LA English DT Article ID SURFACE VIBRATIONAL EXCITATIONS; MOLECULAR-DYNAMICS; CRYSTALLINE SILICON; SEMICONDUCTOR SURFACES; STRUCTURAL-PROPERTIES; AMORPHOUS-SILICON; SI; DIFFUSION; SIMULATION; CLUSTERS AB We have developed an empirical tight-binding model for use in molecular-dynamics simulations to study hydrogen-silicon systems. The hydrogen-silicon interaction is constructed to reproduce the electronic energy levels and vibration frequencies of silane (SiH4). Further use of the model in the studies of disilane (Si2H6) and of hydrogen on the Si(111) surface also yields results in good agreement with first-principles calculations and experiments. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,DEPT PHYS & ASTRON,AMES,IA 50011. RP MIN, BJ (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,MICROELECTR RES CTR,AMES,IA 50011, USA. RI Lee, Young Hee/A-5424-2013 NR 47 TC 36 Z9 37 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1992 VL 45 IS 12 BP 6839 EP 6843 DI 10.1103/PhysRevB.45.6839 PG 5 WC Physics, Condensed Matter SC Physics GA HL049 UT WOS:A1992HL04900047 ER PT J AU MOLLERACH, S MATARRESE, S AF MOLLERACH, S MATARRESE, S TI NONSCALE-INVARIANT DENSITY PERTURBATIONS FROM CHAOTIC EXTENDED INFLATION SO PHYSICAL REVIEW D LA English DT Article ID NONSTANDARD PRIMORDIAL FLUCTUATIONS; COSMOLOGICAL PERTURBATIONS; GENERAL-RELATIVITY; TENSOR THEORY; UNIVERSE; GRAVITY; VARIABILITY; CONSTANT; SPECTRA; FIELD AB Chaotic inflation is analyzed in the frame of scalar-tensor theories of gravity. Fluctuations in the energy density arise from quantum fluctuations of the Brans-Dicke field and of the inflaton field. The spectrum of perturbations is studied for a class of models: it is non-scale-invariant and, for certain values of the parameters, it has a peak. If the peak appears at astrophysically interesting scales it may help to reconcile the cold-dark-matter scenario for structure formation with large-scale observations. C1 UNIV PADUA,DIPARTIMENTO FIS GALILEO GALILEI,I-35131 PADUA,ITALY. RP MOLLERACH, S (reprint author), NASA,FERMILAB ASTROPHYS CTR,POB 500,BATAVIA,IL 60510, USA. NR 57 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 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD MAR 15 PY 1992 VL 45 IS 6 BP 1961 EP 1970 DI 10.1103/PhysRevD.45.1961 PG 10 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HJ691 UT WOS:A1992HJ69100011 ER PT J AU ANTONIADIS, I MOTTOLA, E AF ANTONIADIS, I MOTTOLA, E TI 4-DIMENSIONAL QUANTUM-GRAVITY IN THE CONFORMAL SECTOR SO PHYSICAL REVIEW D LA English DT Article ID DE-SITTER SPACE; COSMOLOGICAL CONSTANT; FIELD-THEORY; STRINGS; INSTABILITY; DIMENSIONS; GEOMETRY; PROPAGATOR; AMPLITUDES; ANOMALIES AB We study the trace-anomaly-induced dynamics of the conformal factor of four-dimensional (4D) quantum gravity. The resulting effective scalar theory is ultraviolet renormalizable, and possesses a nontrivial, infrared stable fixed point. The exact anomalous scaling dimension of the conformal factor at the critical point is derived. We argue that this theory describes 4D gravity at large distances and provides a framework for a dynamical solution of the cosmological-constant problem. C1 UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP ANTONIADIS, I (reprint author), ECOLE POLYTECH,CTR PHYS THEOR,F-91128 PALAISEAU,FRANCE. NR 53 TC 202 Z9 203 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 MAR 15 PY 1992 VL 45 IS 6 BP 2013 EP 2025 DI 10.1103/PhysRevD.45.2013 PG 13 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HJ691 UT WOS:A1992HJ69100017 ER PT J AU GAILLARD, MK PAPADOPOULOS, A PIERCE, DM AF GAILLARD, MK PAPADOPOULOS, A PIERCE, DM TI STRING-INSPIRED SUPERGRAVITY MODEL AT ONE LOOP SO PHYSICAL REVIEW D LA English DT Article ID EFFECTIVE FIELD-THEORIES; SUPERSYMMETRY BREAKING; SUPERSTRING MODELS; TARGET SPACE; DUALITY; CONDENSATION; SYMMETRY AB We study a prototype supergravity model from superstrings, with three generations of matter fields in the untwisted sector, nonperturbatively induced supersymmetry breaking and including threshold corrections in conformity with modular invariance. The scale degeneracy of the vacuum is lifted at the one-loop level, allowing a determination of the fundamental parameters of the effective low-energy theory. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP GAILLARD, MK (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 36 TC 5 Z9 5 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 MAR 15 PY 1992 VL 45 IS 6 BP 2057 EP 2065 DI 10.1103/PhysRevD.45.2057 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HJ691 UT WOS:A1992HJ69100021 ER PT J AU TRUEMAN, TL AF TRUEMAN, TL TI FINITE-SIZE EFFECTS ON PLASMONLIKE EXCITATIONS IN RELATIVISTIC HEAVY-ION COLLISIONS SO PHYSICAL REVIEW D LA English DT Article ID QUARK-GLUON PLASMA; TEMPERATURE; QCD AB The modifications of plasmonlike excitations in hot hadronic or quark-gluon matter due to the finite size of the systems that will be produced in relativistic heavy-ion collisions are investigated. It is shown that the relevant parameter is RM2/\q\ where R is the size of the system, M is the mass of the plasmon in an infinite system, and q is its three-momentum in the plasmon. If RM2/\Q\ << 1, the plasmon excitations will not be produced. This has important implications for plasmons generated in heavy-ion collisions by electromagnetic interactions which have been suggested by some authors. RP TRUEMAN, TL (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD MAR 15 PY 1992 VL 45 IS 6 BP 2125 EP 2128 DI 10.1103/PhysRevD.45.2125 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HJ691 UT WOS:A1992HJ69100031 ER PT J AU BRAATEN, E PISARSKI, RD AF BRAATEN, E PISARSKI, RD TI SIMPLE EFFECTIVE LAGRANGIAN FOR HARD THERMAL LOOPS SO PHYSICAL REVIEW D LA English DT Note ID HOT GAUGE-THEORIES; TEMPERATURE; QCD; AMPLITUDES; INVARIANCE; PLASMA AB Rapid Communications are intended for important new results which deserve accelerated publication, and are therefore given priority in editorial processing and production. A Rapid Communication in Physical Review D should be no longer than five printed pages and must be accompanied by an abstract. Page proofs are sent to authors, but because of the accelerated schedule, publication is generally not delayed for receipt of corrections unless requested by the author. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP BRAATEN, E (reprint author), NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60208, USA. NR 19 TC 275 Z9 275 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 MAR 15 PY 1992 VL 45 IS 6 BP R1827 EP R1830 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HJ691 UT WOS:A1992HJ69100001 ER PT J AU GIOMETTI, CS GEMMELL, MA TAYLOR, J TOLLAKSEN, SL ANGELETTI, R GLUECKSOHNWAELSCH, S AF GIOMETTI, CS GEMMELL, MA TAYLOR, J TOLLAKSEN, SL ANGELETTI, R GLUECKSOHNWAELSCH, S TI EVIDENCE FOR REGULATORY GENES ON MOUSE CHROMOSOME-7 THAT AFFECT THE QUANTITATIVE EXPRESSION OF PROTEINS IN THE FETAL AND NEWBORN LIVER SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE C3H DELETION; C14COS DELETION; QUANTITATIVE EFFECTS; 2-DIMENSIONAL ELECTROPHORESIS ID GEL-ELECTROPHORESIS; 2-DIMENSIONAL ANALYSIS; TISSUE PROTEINS; CELL FRACTIONS; MESSENGER-RNA; SEQUENCE; MICE; DELETIONS; MUTATIONS; SERUM AB A series of deletions around the albino locus on mouse chromosome 7 is believed to include one or more regulatory genes that control the activities of a cluster of liver enzymes. To further characterize the functions of this region of the mouse genome, we have used quantitative two-dimensional electrophoresis to analyze the effects of two of these deletions, C3H and c14coS, on the expression of liver proteins. More than 400 distinct protein gene products were quantitated in livers from fetal and newborn wild-type homozygous (c(ch)/c(ch), heterozygous (c(ch)/C3H or c(ch)/c14CoS), and deletion homozygous (c3H/c3H or c14CoS/c14CoS) mice. Livers of fetal and newborn c3H heterozygotes and homozygous wild-type littermates produced qualitatively identical protein patterns after two-dimensional electrophoresis. In livers of c3H homozygous fetuses, however, abnormal amounts (either increased or decreased relative to homozygous wild-type and heterozygous littermates) of 29 proteins were found. Twenty-eight of these 29 protein anomalies were also found in livers of newborn c3H homozygotes. Livers of fetal and newborn mice homozygous for the c14Cos deletion, which overlaps the c3H deletion and produces a similar phenotype, expressed normal amounts of these proteins. One of the 29 proteins (MSN807) has an amino-terminal sequence similar to a 23-kDa translationally controlled protein abundant in mouse erythroleukemia and sarcoma-180 cells. These results suggest that normal chromosome 7 contains genes, located within the region of the c3H but not the c14CoS deletion, that regulate the abundance of specific proteins in the liver. These proteins cannot be related to the phenotypic alterations shared by the C3H and C14CoS deletions. C1 YESHIVA UNIV ALBERT EINSTEIN COLL MED,DEPT MOLEC GENET,BRONX,NY 10461. YESHIVA UNIV ALBERT EINSTEIN COLL MED,DEPT DEV BIOL & CANC,BRONX,NY 10461. RP GIOMETTI, CS (reprint author), ARGONNE NATL LAB,DIV BIOL & MED RES,ARGONNE,IL 60439, USA. FU NIGMS NIH HHS [GM7250]; NINDS NIH HHS [NS22697] NR 18 TC 6 Z9 6 U1 0 U2 0 PU NATL ACAD PRESS PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD MAR 15 PY 1992 VL 89 IS 6 BP 2448 EP 2452 DI 10.1073/pnas.89.6.2448 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HJ053 UT WOS:A1992HJ05300093 PM 1549608 ER PT J AU MARLEY, NA GAFFNEY, JS ORLANDINI, KA PICEL, KC CHOPPIN, GR AF MARLEY, NA GAFFNEY, JS ORLANDINI, KA PICEL, KC CHOPPIN, GR TI CHEMICAL CHARACTERIZATION OF SIZE-FRACTIONATED HUMIC AND FULVIC MATERIALS IN AQUEOUS SAMPLES SO SCIENCE OF THE TOTAL ENVIRONMENT LA English DT Article; Proceedings Paper CT SYMP ON HUMIC SUBSTANCES : GEOCHEMISTRY, STRUCTURE, AGRICULTURAL AND ENVIRONMENTAL ROLE, AND INDUSTRIAL UTILIZATION, AT 198TH MEETING OF THE AMERICAN CHEMICAL SOC CY SEP 10-15, 1989 CL MIAMI BEACH, FL SP AMER CHEM SOC, DIV GEOCHEM DE HUMICS; FULVICS; ULTRAFILTRATION; CHEMICAL CHARACTERIZATION; POLLUTANT TRANSPORT ID DIFFUSE REFLECTANCE; SUBSTANCES; SOILS; ACIDS; SPECTROSCOPY; COMPLEXATION; H-1-NMR; WATER; IR AB Humic and fulvic acids have been shown to be potentially important transport agents for inorganic and organic contaminants, including radionuclides, in surface and groundwaters. In this work, the possibility of characterizing humic and fulvic materials in the colloidal and macromolecular size ranges (i.e., between 3000 molecular weight (1 nm) and 0.45-mu-m) after size fractionation and collection with hollow-fiber ultrafilters has been investigated. Three surface waters have been examined as test cases. Using ultrafiltration, sized samples of humic and fulvic acids were chemically characterized with C-13-nuclear magnetic resonance spectroscopy (NMR), Fourier transform infrared spectroscopy (FTIR) using diffuse reflectance, and pyrolysis/gas chromatography (GC). These test cases demonstrate that sufficient material can be obtained by ultrafiltration with minimal or no alteration to the materials. In addition, inorganic analyses performed on the size fractions show that ultrafiltration can also allow the binding capacity of the humic materials in each fraction to be measured. Substantial variability among the different humic and fulvic fractions demonstrates the importance of sizing submicron materials in attempts to understand the mechanisms of pollutant transport by natural humic materials. C1 FLORIDA STATE UNIV,DEPT CHEM,TALLAHASSEE,FL 32306. RP MARLEY, NA (reprint author), ARGONNE NATL LAB,DIV ENVIRONM RES,BLDG 203,ARGONNE,IL 60439, USA. NR 27 TC 27 Z9 27 U1 1 U2 8 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 MAR 15 PY 1992 VL 113 IS 1-2 BP 159 EP 177 DI 10.1016/0048-9697(92)90023-L PG 19 WC Environmental Sciences SC Environmental Sciences & Ecology GA HN580 UT WOS:A1992HN58000012 ER PT J AU GOUDER, T COLMENARES, CA NAEGELE, JR SPIRLET, JC VERBIST, J AF GOUDER, T COLMENARES, CA NAEGELE, JR SPIRLET, JC VERBIST, J TI STUDY OF THE CO ADSORPTION ON U, UNI2 AND UNI5 SO SURFACE SCIENCE LA English DT Article ID RAY PHOTOELECTRON-SPECTROSCOPY; VIBRATIONAL PROPERTIES; SYNCHROTRON RADIATION; ELECTRONIC-STRUCTURE; SURFACE; URANIUM; CHEMISORPTION; PHOTOEMISSION; ALLOYS; OXYGEN AB Ultraviolet and X-ray photoelectron spectroscopies (UPS and XPS, respectively) were used to study the CO adsorption on U, UNi2 and UNi5 in the temperature range from 73 to 573 K. At 73 K both dissociative adsorption and molecular chemisorption were observed at CO dosages below 6 L (L = langmuir). The role of the Ni surface atoms as sites for the molecular chemisorption was demonstrated, while U surface atoms were sites for the dissociative adsorption of CO. However, Ni atoms lose this property with increasing U surface concentration, which is attributed to a change of their electronic structure. At dosages above 6 L, CO is physisorbed on all samples. At temperatures at and above 300 K only dissociative CO adsorption was observed. A surface oxidic compound which is not a simple uranium oxide (UO(y), y = 2 to 3) is formed. It is characterized by an emission at the Fermi level with a predominant U 5f character. We believe it is a uranium oxycarbide UOxC1-x. C1 FAC UNIV NOTRE DAME PAIX,SPECT ELECTR LAB,B-5000 NAMUR,BELGIUM. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP GOUDER, T (reprint author), EUROPEAN INST TRANSURANIUM ELEMENTS,COMMISS EUROPEAN COMMUNITIES,JOINT RES CTR,POSTFACH 2340,W-7500 KARLSRUHE,GERMANY. NR 33 TC 26 Z9 29 U1 3 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD MAR 15 PY 1992 VL 264 IS 3 BP 354 EP 364 DI 10.1016/0039-6028(92)90191-8 PG 11 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA HJ952 UT WOS:A1992HJ95200009 ER PT J AU NOURBAKHSH, S YIN, HM LIAO, CL NG, CY AF NOURBAKHSH, S YIN, HM LIAO, CL NG, CY TI A 193 NM PHOTODISSOCIATION TIME-OF-FLIGHT MASS-SPECTROMETRIC STUDY OF C6H5SH AND C6H5SCH3 SO CHEMICAL PHYSICS LETTERS LA English DT Article ID PHOTOFRAGMENTATION AB The kinetic energy releases of the photodissociation processes C6H5SH + h-nu (193 nm) --> C6H5 + SH, and C6H5SCH3 + h-nu (193 nm) --> C6H5 + SCH3 and C6H5S + CH3, have been measured by the time-of-flight mass spectrometric method. The available energies for these processes are found to appear predominantly (almost-equal-to 70-80%) as internal excitations for the photofragments. Based on the thresholds of kinetic energy release spectra, we obtain values of 87.4 +/- 2.0, 87 +/- 3, and < 81 +/- 7 kcal/mol for the dissociation energies of the C6H5-SH, C6H5S-CH3, and C6H5S-CH3 bonds at 0 K. C1 DALIAN INST CHEM PHYS,DALIAN,PEOPLES R CHINA. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP NOURBAKHSH, S (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011, USA. NR 15 TC 13 Z9 13 U1 1 U2 3 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 MAR 13 PY 1992 VL 190 IS 5 BP 469 EP 475 DI 10.1016/0009-2614(92)85175-A PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HK445 UT WOS:A1992HK44500014 ER PT J AU SINGER, S AF SINGER, S TI FREE-ELECTRON LASER SO SCIENCE LA English DT Letter RP SINGER, S (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIRECTED ENERGY SCI TECHNOL,LOS ALAMOS,NM 87545, USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD MAR 13 PY 1992 VL 255 IS 5050 BP 1335 EP 1335 DI 10.1126/science.255.5050.1335-b PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HH744 UT WOS:A1992HH74400004 PM 17801192 ER PT J AU YATES, JT ALVEY, MD DRESSER, MJ HENDERSON, MA KISKINOVA, M RAMSIER, RD SZABO, A AF YATES, JT ALVEY, MD DRESSER, MJ HENDERSON, MA KISKINOVA, M RAMSIER, RD SZABO, A TI DIRECT OBSERVATION OF CHEMICAL-BOND DYNAMICS ON SURFACES SO SCIENCE LA English DT Article ID ELECTRON-STIMULATED-DESORPTION; ION ANGULAR-DISTRIBUTIONS; NITRIC-OXIDE ADSORPTION; CO-ADSORPTION; INFRARED-SPECTROSCOPY; THEORETICAL ASPECTS; ADSORBATE LAYERS; PT(111) SURFACE; ESDIAD; NI(110) AB The dynamics of chemisorbed species as they swing to-and-fro on their adsorption sites may be directly observed with electron-stimulated desorption. The observation of the thermal disorder in adsorbate chemical bond directions, through studies of the thermal excitation of librational modes, allows one to visualize the potential energy surfaces controlling the structure and dynamics of adsorbates on single crystal metal and semiconductor surfaces. This information may be useful in understanding surface diffusion as well as the spatial aspects of surface chemical reactions. C1 WASHINGTON STATE UNIV, DEPT PHYS, PULLMAN, WA 99164 USA. SINCROTRONE TRIESTE, I-34012 TRIESTE, ITALY. UNIV WASHINGTON, DEPT CHEM, SEATTLE, WA 98195 USA. PACIFIC NW LAB, RICHLAND, WA 99357 USA. RP YATES, JT (reprint author), UNIV PITTSBURGH, DEPT CHEM, CTR SURFACE SCI, PITTSBURGH, PA 15260 USA. NR 72 TC 38 Z9 38 U1 1 U2 11 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD MAR 13 PY 1992 VL 255 IS 5050 BP 1397 EP 1403 DI 10.1126/science.255.5050.1397 PG 7 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HH744 UT WOS:A1992HH74400044 PM 17801228 ER PT J AU WANG, J DAVENPORT, AJ ISAACS, HS OCKO, BM AF WANG, J DAVENPORT, AJ ISAACS, HS OCKO, BM TI SURFACE-CHARGE INDUCED ORDERING OF THE AU(111) SURFACE SO SCIENCE LA English DT Article ID SCANNING TUNNELING MICROSCOPY; 100 CRYSTAL FACES; ELECTROCHEMICAL-CELL; ELECTRODE SURFACES; GOLD; RECONSTRUCTION; INSITU; DIFFRACTION; RESOLUTION; PLATINUM AB Synchrotron surface x-ray scattering (SXS) studies have been carried out at the Au(111)/electrolyte interface to determine the influence of surface charge on the microscopic arrangement of gold surface atoms. At the electrochemical interface, the surface charge density can be continuously varied by controlling the applied potential. The top layer of gold atoms undergoes a reversible phase transition between the (1 x 1) bulk termination and a (23 x square-root 3) reconstructed phase on changing the electrode potential. In order to differentiate the respective roles of surface charge and adsorbates, studies were carried out in 0.1 M NaF, NaCl, and NaBr solutions. The phase transition occurs at an induced surface charge density of 0.07 +/- 0.02 electron per atom in all three solutions. C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. RI Wang, Jia/B-6346-2011; Davenport, Alison/J-6089-2013 OI Davenport, Alison/0000-0003-0853-515X NR 29 TC 94 Z9 96 U1 3 U2 31 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD MAR 13 PY 1992 VL 255 IS 5050 BP 1416 EP 1418 DI 10.1126/science.255.5050.1416 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HH744 UT WOS:A1992HH74400049 PM 17801231 ER PT J AU KANG, C ZHANG, XH RATLIFF, R MOYZIS, R RICH, A AF KANG, C ZHANG, XH RATLIFF, R MOYZIS, R RICH, A TI CRYSTAL-STRUCTURE OF 4-STRANDED OXYTRICHA TELOMERIC DNA SO NATURE LA English DT Article ID POLYINOSINIC ACID; POLYGUANYLIC ACID; FIBER DIFFRACTION; 3' TERMINUS; X-RAY AB The sequence d(GGGGTTTTGGGG) from the 3' over-hang of the Oxytricha telomere has been crystallized and its three-dimensional structure solved to 2.5 angstrom resolution. The oligonucleotide forms hairpins, two of which join to make a four-stranded helical structure with the loops containing four thymine residues at either end. The guanine residues are held together by cyclic hydrogen bonding and an ion is located in the centre. The four guanine residues in each segment have a glycosyl conformation that alternates between anti and syn. There are two four-stranded molecules in the asymmetric unit showing that the structure has some intrinsic flexibility. C1 UNIV CALIF LOS ALAMOS SCI LAB,CTR HUMAN GENOME STUDIES,LOS ALAMOS,NM 87545. RP KANG, C (reprint author), MIT,DEPT BIOL,CAMBRIDGE,MA 02139, USA. NR 30 TC 517 Z9 521 U1 3 U2 16 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD MAR 12 PY 1992 VL 356 IS 6365 BP 126 EP 131 DI 10.1038/356126a0 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HH731 UT WOS:A1992HH73100049 PM 1545863 ER PT J AU FRANCIS, AJ DODGE, CJ GILLOW, JB AF FRANCIS, AJ DODGE, CJ GILLOW, JB TI BIODEGRADATION OF METAL CITRATE COMPLEXES AND IMPLICATIONS FOR TOXIC-METAL MOBILITY SO NATURE LA English DT Article ID BACILLUS-SUBTILIS; AQUEOUS-SOLUTION; MAGNESIUM; ACONITASE; TRANSPORT; SYSTEMS; WASTES; IONS AB THE presence of synthetic and naturally occurring chelating agents in nuclear and toxic-metal wastes is a major concern because of their potential to enhance mobilization of metal ions away from the disposal sites 1-3. Of particular interest is citric acid, which is present in low-level and transuranic radioactive wastes 4,5 and in domestic and industrial wastes (as washing fluids, for instance), as well as being found naturally. Citrate ions form multidentate, stable complexes with a variety of toxic metals and radionuclides; but biodegradation of these complexes, precipitating the metal ions as insoluble hydroxides, oxides or other salts, may retard migration. Here we report a study of the biodegradation of citrate complexes of Ca, Fe(II), Fe(III), Cd, Cu, Ni, Pb and U. Several of these complexes were not readily degraded by bacteria, and the biodegradability depended on the chemical nature of the complex, not on the toxicity of the metal to the bacteria. This resistance to biodegradation implies that citrate complexation may play an important part in migration of these hazardous wastes. RP FRANCIS, AJ (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973, USA. NR 26 TC 194 Z9 204 U1 3 U2 33 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD MAR 12 PY 1992 VL 356 IS 6365 BP 140 EP 142 DI 10.1038/356140a0 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HH731 UT WOS:A1992HH73100054 ER PT J AU CONNELLY, JP CRANNELL, H FAGG, LW OBRIEN, JT PETRAITIS, M SOBER, DI RAMAN, S DEININGER, JR WILLIAMSON, SE AF CONNELLY, JP CRANNELL, H FAGG, LW OBRIEN, JT PETRAITIS, M SOBER, DI RAMAN, S DEININGER, JR WILLIAMSON, SE TI MAGNETIC DIPOLE STRENGTH IN CA-46 OBSERVED WITH 180-DEGREES ELECTRON-SCATTERING SO PHYSICS LETTERS B LA English DT Article ID TRANSITION AB Results are presented from a search for M1 strength in Ca-46 by means of 180-degrees electron scattering at low momentum transfer. We report the presence of a 1+ state at 13.02 +/- 0.04 MeV with a reduced electromagnetic transition strength, B(M1) = 2.47 +/- 0.77-mu(N)2. The excitation energy of this level is approximately 2 MeV higher than strong 1+ states seen in other even-even calcium isotopes. No evidence was seen for M1 strength in the 10 MeV excitation energy region where strength is predicted by shell model calculations. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801. UNIV ILLINOIS,NUCL PHYS LAB,URBANA,IL 61801. RP CONNELLY, JP (reprint author), CATHOLIC UNIV AMER,DEPT PHYS,WASHINGTON,DC 20064, USA. NR 11 TC 2 Z9 2 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 MAR 12 PY 1992 VL 277 IS 4 BP 383 EP 386 DI 10.1016/0370-2693(92)91798-E PG 4 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HL568 UT WOS:A1992HL56800001 ER PT J AU JIN, HQ RIEDINGER, LL YU, CH NAZAREWICZ, W WYSS, R ZHANG, JY BAKTASH, C GARRETT, JD JOHNSON, NR LEE, IY MCGOWAN, FK AF JIN, HQ RIEDINGER, LL YU, CH NAZAREWICZ, W WYSS, R ZHANG, JY BAKTASH, C GARRETT, JD JOHNSON, NR LEE, IY MCGOWAN, FK TI ELECTROMAGNETIC PROPERTIES OF THE [(303)TILDE]5/2, 7/2 PSEUDOSPIN DOUBLET IN RE-175 SO PHYSICS LETTERS B LA English DT Article ID RARE-EARTH NUCLEI; HIGH SPINS; DEFORMATIONS; STATES AB High-spin states in 175Re were studied using the Gd-156(Na-23, 4n) reaction. Five rotational decay sequences have been identified and assigned to proton configurations. Eight strong interband transitions are observed connecting the members of the [303] 5/2, 7/2 pseudo-spin doublet. Both the interband and intraband M1 and E2 transition rates can be understood in the pseudo SU (3) formalism with Coriolis mixing. C1 OAK RIDGE NATL LAB,JOINT INST HEAVY ION RES,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. UNIV WARSAW,INST THEORET PHYS,PL-00681 WARSAW,POLAND. INST MODERN PHYS,LANZHOU,PEOPLES R CHINA. RP JIN, HQ (reprint author), UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996, USA. NR 15 TC 19 Z9 20 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 MAR 12 PY 1992 VL 277 IS 4 BP 387 EP 392 DI 10.1016/0370-2693(92)91799-F PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HL568 UT WOS:A1992HL56800002 ER PT J AU KIM, UJ SHIZUYA, H DEJONG, PJ BIRREN, B SIMON, MI AF KIM, UJ SHIZUYA, H DEJONG, PJ BIRREN, B SIMON, MI TI STABLE PROPAGATION OF COSMID SIZED HUMAN DNA INSERTS IN AN F-FACTOR BASED VECTOR SO NUCLEIC ACIDS RESEARCH LA English DT Article ID HOST; SEQUENCES; CLONING AB Instability of complex mammalian genomic DNA inserts is commonplace in cosmid libraries constructed in conventional multicopy vectors. To develop a means to construct stable libraries, we have developed a low copy number cosmid vector based on the E. coli F factor replicon (Fosmid). We have tested relative stability of human DNA inserts in Fosmids and in two conventional multicopy vectors (Lawrist 16 and Supercos) by comparing the frequency of changes in restriction patterns of the inserts after propagating randomly picked human genomic clones based on these vectors. We found that the clones based on Fosmid vector undergo detectable changes at a greatly reduced frequency. We also observed that sequences that undergo drastic rearrangements and deletions during propagation in a conventional vector were stably propagated when recloned as Fosmids. The results indicate that Fosmid system may be useful for constructing stable libraries from complex genomes. C1 CALTECH,DIV BIOL 14775,PASADENA,CA 91125. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,HUMAN GENOME CTR L452,LIVERMORE,CA 94550. NR 8 TC 185 Z9 200 U1 0 U2 6 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PD MAR 11 PY 1992 VL 20 IS 5 BP 1083 EP 1085 DI 10.1093/nar/20.5.1083 PG 3 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA HK001 UT WOS:A1992HK00100017 PM 1549470 ER PT J AU WIJMENGA, C DEAVEN, L FRANTS, RR AF WIJMENGA, C DEAVEN, L FRANTS, RR TI DINUCLEOTIDE REPEAT POLYMORPHISM ADJACENT TO THE ANT1 GENE ON 4Q35 SO NUCLEIC ACIDS RESEARCH LA English DT Note C1 LEIDEN UNIV,MGC,DEPT HUMAN GENET,2300 RA LEIDEN,NETHERLANDS. LOS ALAMOS NAT LIB,LOS ALAMOS,NM. RI Wijmenga, Cisca/D-2173-2009 NR 1 TC 2 Z9 2 U1 0 U2 0 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PD MAR 11 PY 1992 VL 20 IS 5 BP 1161 EP 1161 DI 10.1093/nar/20.5.1161 PG 1 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA HK001 UT WOS:A1992HK00100051 PM 1549496 ER PT J AU ILES, DE SEGERS, B DEJONG, P ALLEMAN, J WIERINGA, B AF ILES, DE SEGERS, B DEJONG, P ALLEMAN, J WIERINGA, B TI TRINUCLEOTIDE REPEAT POLYMORPHISM AT THE D19S190 LOCUS SO NUCLEIC ACIDS RESEARCH LA English DT Note C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,CTR HUMAN GENOME,DIV BIOMED SCI L452,LIVERMORE,CA 94550. RP ILES, DE (reprint author), CATHOLIC UNIV NIJMEGEN,SCH MED SCI,DEPT CELL BIOL & HISTOL,POB 9101,6500 HB NIJMEGEN,NETHERLANDS. RI Wieringa, Berend/A-5346-2011 OI Wieringa, Berend/0000-0001-9192-8020 NR 1 TC 13 Z9 13 U1 0 U2 0 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PD MAR 11 PY 1992 VL 20 IS 5 BP 1170 EP 1170 PG 1 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA HK001 UT WOS:A1992HK00100069 PM 1549506 ER PT J AU ILES, DE SEGERS, B DEJONG, P ALLEMAN, J WIERINGA, B AF ILES, DE SEGERS, B DEJONG, P ALLEMAN, J WIERINGA, B TI DINUCLEOTIDE REPEAT POLYMORPHISM AT THE D19S191 LOCUS SO NUCLEIC ACIDS RESEARCH LA English DT Note C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,CTR HUMAN GENOME,DIV BIOMED SCI L452,LIVERMORE,CA 94550. RP ILES, DE (reprint author), CATHOLIC UNIV NIJMEGEN,SCH MED SCI,DEPT CELL BIOL & HISTOL,POB 9101,6500 HB NIJMEGEN,NETHERLANDS. RI Wieringa, Berend/A-5346-2011 OI Wieringa, Berend/0000-0001-9192-8020 NR 1 TC 13 Z9 13 U1 0 U2 0 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PD MAR 11 PY 1992 VL 20 IS 5 BP 1170 EP 1170 PG 1 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA HK001 UT WOS:A1992HK00100070 PM 1549506 ER PT J AU CASTOR, JI DYKEMA, PG KLEIN, RI AF CASTOR, JI DYKEMA, PG KLEIN, RI TI A NEW SCHEME FOR MULTIDIMENSIONAL LINE TRANSFER .2. ETLA METHOD IN ONE DIMENSION WITH APPLICATION TO IRON K-ALPHA LINES SO ASTROPHYSICAL JOURNAL LA English DT Article DE ATOMIC PROCESSES; GALAXIES, ACTIVE; GALAXIES, NUCLEI; RADIATIVE TRANSFER; X-RAYS, INTERSTELLAR ID TCHEBYCHEV ITERATION; EMISSION; NGC-1068; MODELS; NUCLEI; IONS AB The one-dimensional version of the radiation hydrodynamics computer code ALTAIR is described. It is an implementation of the equivalent two-level atom method, and also incorporates a variety of other iterative techniques to achieve a fast, accurate solution of the problem of coupled atomic kinetics and radiative transfer. All the techniques are described in sufficient detail to enable their use by others. The application of the program is illustrated by a set of calculations of the iron X-ray emission spectrum from intercloud hot gas that may exist in the broad-line region of active galactic nuclei. These calculations demonstrate that such spectra may be a rich lode to mine for information about the hot gas in AGNs, and also that the concept of "the iron, K-alpha line" inadequately depicts the spectrum. C1 UNIV CALIF BERKELEY, DEPT ASTRON, BERKELEY, CA 94720 USA. RP UNIV CALIF LAWRENCE LIVERMORE NATL LAB, L-23, POB 808, LIVERMORE, CA 94550 USA. NR 30 TC 23 Z9 23 U1 2 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD MAR 10 PY 1992 VL 387 IS 2 BP 561 EP 571 DI 10.1086/171107 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HF938 UT WOS:A1992HF93800013 ER PT J AU GRIFFIN, PA HERNANDEZ, OF AF GRIFFIN, PA HERNANDEZ, OF TI STRUCTURE OF IRREDUCIBLE SU(2) PARAFERMION MODULES DERIVED VIA THE FEIGIN-FUCHS CONSTRUCTION SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A LA English DT Article AB We show how the Feigin-Fuchs Coulomb-gas construction, with two free Gaussian bosons, can be used to derive the representation theory of the SU(2) parafermion models. We identify the generators of the chiral algebra within the bosonic Fock space and derive the chiral algebra of the finitely reducible models, which correspond to the SU(2) and SU(1, 1) parafermion algebras. We then focus on the SU(2) highest-weight modules in the remainder of the paper. Unitarity of the modules requires that the states of the parafermion theory be independent of the zero modes of two fermionic vertex operators of the bosonic theory. The expressions for the Virasoro highest weights of the models are doubly degenerate in the bosonic Fock space. We formulate the correlation functions of these operators in the parafermion Hilbert space, and in particular, the fusion rules for the Virasoro highest weights are derived in an elegant way. Finally, the irreducible parafermion characters are derived. We discuss the connection between our analysis and previous work on representation theory based on BRST cohomology. RP GRIFFIN, PA (reprint author), FERMI NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. NR 0 TC 7 Z9 7 U1 0 U2 1 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0217-751X J9 INT J MOD PHYS A JI Int. J. Mod. Phys. A PD MAR 10 PY 1992 VL 7 IS 6 BP 1233 EP 1265 DI 10.1142/S0217751X92000533 PG 33 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA HC868 UT WOS:A1992HC86800007 ER PT J AU CONSTABLE, S SHANKLAND, TJ DUBA, A AF CONSTABLE, S SHANKLAND, TJ DUBA, A TI THE ELECTRICAL-CONDUCTIVITY OF AN ISOTROPIC OLIVINE MANTLE SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID INTERSITE DISTRIBUTION; TEMPERATURE; PRESSURE; MG AB In order to extend the useful temperature range of interpretation of olivine electrical conductivity-sigma we have used the nonlinear iterative Marquardt technique to fit experimental data over the range 720-degrees-1500-degrees-C to the parametric form sigma = sigma-1e(-A1/kT) + sigma-2e(-A2/kT), where k is Boltzmann's constant and T is absolute temperature. The model describes conduction by migration of two different thermally activated defect populations with activation energies A1 and A2, and preexponential terms sigma-1 and sigma-2 that depend on number of charge carriers and their mobility and that may be different for each crystallographic direction. A combined interpretation of recent high (San Carlos olivine) and low (Jackson County dunite) temperature measurements has been made that demonstrates that a single activation energy A1 for all three crystallographic directions adequately fits the data. The parametric fits show that the high-temperature conduction mechanism has far greater anisotropy than the low-temperature mechanism, consistent with previous assignments to ionic and electronic conduction, respectively. The geometric mean of the conductivity in the three directions is approximately sigma-BAR 10(2.402)e-1.60eV/kT + 10(9.17)e-4.25eV/kT S/m and is presented as a model for isotropic olivine, SO2, appropriate from 720-degrees-C to above 1500-degrees-C, at oxygen fugacities near the center of the olivine stability field. It is observed that the magnitudes of sigma-1 for the three crystal directions are similar to the ratios of the inter-ionic distances between the M1 magnesium sites in olivine, to within 5%, consistent with Fe3+ preferring the M1 site below 1200-degrees-C. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP CONSTABLE, S (reprint author), UNIV CALIF SAN DIEGO,SCRIPPS INST OCEANOG,INST GEOPHYS & PLANETARY PHYS,0225,LA JOLLA,CA 92093, USA. RI Constable, Steven/B-8959-2008 NR 24 TC 113 Z9 121 U1 2 U2 7 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD MAR 10 PY 1992 VL 97 IS B3 BP 3397 EP 3404 DI 10.1029/91JB02453 PG 8 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA HG748 UT WOS:A1992HG74800012 ER PT J AU JOYCE, SA HOUSTON, JE MICHALSKE, TA AF JOYCE, SA HOUSTON, JE MICHALSKE, TA TI DIFFERENTIATION OF TOPOGRAPHICAL AND CHEMICAL STRUCTURES USING AN INTERFACIAL FORCE MICROSCOPE SO APPLIED PHYSICS LETTERS LA English DT Article ID TUNGSTEN TIP; FILMS; SURFACES AB The forces between a tungsten tip and a self-assembled monolayer of hexadecylthiol (C16H33SH) on a thin gold film have been studied using a newly developed interfacial-force microscope. Imaging of the surface, combined with spatially resolved force versus separation measurements, allow for the distinction of topographical and chemical features of the surface. Several distinct regions are observed for this system. The first, characterized by a very weak interfacial interaction between tip and sample, is representative of the self-assembled monolayer. The other regions show relatively strong, long-range attractive forces, which are associated with gross defects in the film. RP JOYCE, SA (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. RI Joyce, Stephen/Q-7804-2016 OI Joyce, Stephen/0000-0003-1330-7362 NR 13 TC 15 Z9 15 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 9 PY 1992 VL 60 IS 10 BP 1175 EP 1177 DI 10.1063/1.107396 PG 3 WC Physics, Applied SC Physics GA HH874 UT WOS:A1992HH87400009 ER PT J AU ABE, F AMIDEI, D APOLLINARI, G ATAC, M AUCHINCLOSS, P BADEN, AR BACCHETTA, N BAILEY, MW BAMBERGER, A BARNETT, BA BARBAROGALTIERI, A BARNES, VE BAUMANN, T BEDESCHI, F BEHRENDS, S BELFORTE, S BELLETTINI, G BELLINGER, J BENJAMIN, D BENSINGER, J BERETVAS, A BERGE, JP BERTOLUCCI, S BHADRA, S BINKLEY, M BLAIR, R BLOCKER, C BOLOGNESI, V BOOTH, AW BOSWELL, C BRANDENBURG, G BROWN, D BUCKLEYGEER, F BUDD, HS BUSETTO, G BYONWAGNER, A BYRUM, KL CAMPAGNARI, C CAMPBELL, M CANER, A CAREY, R CARITHERS, W CARLSMITH, D CARROLL, JT CASHMORE, R CASTRO, A CERVELLI, F CHADWICK, K CHIARELLI, G CHINOWSKY, W CIHANGIR, S CLARK, AG CONNOR, D CONTRERAS, M COOPER, J CORDELLI, M CRANE, D CURATOLO, M DAY, C DEJONGH, F DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DERWENT, PF DEVLIN, T DIBITONTO, D DICKSON, M DRUCKER, RB EINSWEILER, K ELIAS, JE ELY, R ENO, S ERREDE, S ESPOSITO, B FLAUGHER, B FOSTER, GW FRANKLIN, M FREEMAN, J FRISCH, H FUESS, T FUKUI, Y FUNAYAMA, Y GARFINKEL, AF GAUTHIER, A GEER, S GERDES, DW GIANNETTI, P GIOKARIS, N GIROMINI, P GLADNEY, L GOLD, M GOULIANOS, K GRASSMANN, H GROSSOPILCHER, C HABER, C HAHN, SR HANDLER, R HARA, K HARRIS, RM HAUSER, J HAWK, C HESSING, T HOLLEBEEK, R HOLLOWAY, L HU, P HUBBARD, B HUFFMAN, BT HUGHES, R HURST, P HUTH, J HYLEN, J INCAGLI, M INO, T ISO, H JENSEN, H JESSOP, CP JOHNSON, RP JOSHI, U KADEL, RW KAMON, T KANDA, S KARDELIS, DA KARLINER, I KEARNS, E KEEBLE, L KEPHART, R KESTEN, P KEUP, RM KEUTELIAN, H KIM, D KIM, S KIRSCH, L KONDO, K KONIGSBERG, J KOVACS, E KUHLMANN, SE KUNS, E LAASANEN, AT LAMOUREUX, JI LEONE, S LI, W LISS, TM LOCKYER, N LUCHINI, CB LUKENS, P MAAS, P MAESHIMA, K MANGANO, M MARRINER, JP MARIOTTI, M MARKELOFF, R MARKOSKY, LA MATTINGLY, R MCINTYRE, P MENZIONE, A MEYER, T MIKAMO, S MILLER, M MIMASHI, T MISCETTI, S MISHINA, M MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A NAKAE, LF NAKANO, I NELSON, C NEWMANHOLMES, C NG, JST NINOMIYA, M NODULMAN, L OGAWA, S PAOLETTI, R PARA, A PARE, E PARK, S PATRICK, J PHILLIPS, TJ PTOHOS, F PLUNKETT, R PONDROM, L PROUDFOOT, J PUNZI, G QUARRIE, D RAGAN, K REDLINGER, G RHOADES, J ROACH, M RIMONDI, F RISTORI, L ROHALY, T ROODMAN, A SAKUMOTO, WK SANSONI, A SARD, RD SAVOYNAVARRO, A SCARPINE, V SCHLABACH, P SCHMIDT, EE SCHNEIDER, O SCHUB, MH SCHWITTERS, R SCRIBANO, A SEGLER, S SEIYA, Y SEKIGUCHI, M SHAPIRO, M SHAW, NM SHEAFF, M SHOCHET, M SIEGRIST, J SINERVO, P SKARHA, J SLIWA, K SMITH, DA SNIDER, FD SONG, L SPAHN, M STDENIS, R STEFANINI, A SULLIVAN, G SWARTZ, RL TAKANO, M TARTARELLI, F TAKIKAWA, K TAREM, S THERIOT, D TIMKO, M TIPTON, P TKACZYK, S TOLLESTRUP, A TONNISON, J TRISCHUK, W TURINI, N TSAY, Y UKEGAWA, F UNDERWOOD, D VEJCIK, S VIDAL, R WAGNER, RG WAGNER, RL WAINER, N WALSH, J WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WHITE, SN WICKLUND, AB WILLIAMS, HH WINER, BL WYSS, J YAGIL, A YAMASHITA, A YASUOKA, K YEH, GP YOH, J YOKOYAMA, M YUN, JC ZANETTI, A ZETTI, F ZUCCHELLI, S AF ABE, F AMIDEI, D APOLLINARI, G ATAC, M AUCHINCLOSS, P BADEN, AR BACCHETTA, N BAILEY, MW BAMBERGER, A BARNETT, BA BARBAROGALTIERI, A BARNES, VE BAUMANN, T BEDESCHI, F BEHRENDS, S BELFORTE, S BELLETTINI, G BELLINGER, J BENJAMIN, D BENSINGER, J BERETVAS, A BERGE, JP BERTOLUCCI, S BHADRA, S BINKLEY, M BLAIR, R BLOCKER, C BOLOGNESI, V BOOTH, AW BOSWELL, C BRANDENBURG, G BROWN, D BUCKLEYGEER, F BUDD, HS BUSETTO, G BYONWAGNER, A BYRUM, KL CAMPAGNARI, C CAMPBELL, M CANER, A CAREY, R CARITHERS, W CARLSMITH, D CARROLL, JT CASHMORE, R CASTRO, A CERVELLI, F CHADWICK, K CHIARELLI, G CHINOWSKY, W CIHANGIR, S CLARK, AG CONNOR, D CONTRERAS, M COOPER, J CORDELLI, M CRANE, D CURATOLO, M DAY, C DEJONGH, F DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DERWENT, PF DEVLIN, T DIBITONTO, D DICKSON, M DRUCKER, RB EINSWEILER, K ELIAS, JE ELY, R ENO, S ERREDE, S ESPOSITO, B FLAUGHER, B FOSTER, GW FRANKLIN, M FREEMAN, J FRISCH, H FUESS, T FUKUI, Y FUNAYAMA, Y GARFINKEL, AF GAUTHIER, A GEER, S GERDES, DW GIANNETTI, P GIOKARIS, N GIROMINI, P GLADNEY, L GOLD, M GOULIANOS, K GRASSMANN, H GROSSOPILCHER, C HABER, C HAHN, SR HANDLER, R HARA, K HARRIS, RM HAUSER, J HAWK, C HESSING, T HOLLEBEEK, R HOLLOWAY, L HU, P HUBBARD, B HUFFMAN, BT HUGHES, R HURST, P HUTH, J HYLEN, J INCAGLI, M INO, T ISO, H JENSEN, H JESSOP, CP JOHNSON, RP JOSHI, U KADEL, RW KAMON, T KANDA, S KARDELIS, DA KARLINER, I KEARNS, E KEEBLE, L KEPHART, R KESTEN, P KEUP, RM KEUTELIAN, H KIM, D KIM, S KIRSCH, L KONDO, K KONIGSBERG, J KOVACS, E KUHLMANN, SE KUNS, E LAASANEN, AT LAMOUREUX, JI LEONE, S LI, W LISS, TM LOCKYER, N LUCHINI, CB LUKENS, P MAAS, P MAESHIMA, K MANGANO, M MARRINER, JP MARIOTTI, M MARKELOFF, R MARKOSKY, LA MATTINGLY, R MCINTYRE, P MENZIONE, A MEYER, T MIKAMO, S MILLER, M MIMASHI, T MISCETTI, S MISHINA, M MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A NAKAE, LF NAKANO, I NELSON, C NEWMANHOLMES, C NG, JST NINOMIYA, M NODULMAN, L OGAWA, S PAOLETTI, R PARA, A PARE, E PARK, S PATRICK, J PHILLIPS, TJ PTOHOS, F PLUNKETT, R PONDROM, L PROUDFOOT, J PUNZI, G QUARRIE, D RAGAN, K REDLINGER, G RHOADES, J ROACH, M RIMONDI, F RISTORI, L ROHALY, T ROODMAN, A SAKUMOTO, WK SANSONI, A SARD, RD SAVOYNAVARRO, A SCARPINE, V SCHLABACH, P SCHMIDT, EE SCHNEIDER, O SCHUB, MH SCHWITTERS, R SCRIBANO, A SEGLER, S SEIYA, Y SEKIGUCHI, M SHAPIRO, M SHAW, NM SHEAFF, M SHOCHET, M SIEGRIST, J SINERVO, P SKARHA, J SLIWA, K SMITH, DA SNIDER, FD SONG, L SPAHN, M STDENIS, R STEFANINI, A SULLIVAN, G SWARTZ, RL TAKANO, M TARTARELLI, F TAKIKAWA, K TAREM, S THERIOT, D TIMKO, M TIPTON, P TKACZYK, S TOLLESTRUP, A TONNISON, J TRISCHUK, W TURINI, N TSAY, Y UKEGAWA, F UNDERWOOD, D VEJCIK, S VIDAL, R WAGNER, RG WAGNER, RL WAINER, N WALSH, J WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WHITE, SN WICKLUND, AB WILLIAMS, HH WINER, BL WYSS, J YAGIL, A YAMASHITA, A YASUOKA, K YEH, GP YOH, J YOKOYAMA, M YUN, JC ZANETTI, A ZETTI, F ZUCCHELLI, S TI LEPTON ASYMMETRY IN W-BOSON DECAYS FROM PBARP COLLISIONS AT SQUARE-ROOT-S=1.8TEV SO PHYSICAL REVIEW LETTERS LA English DT Article ID PARTON DISTRIBUTIONS; SCATTERING; ENERGIES AB The charge asymmetry of leptons from W-boson decay has been measured using ppBAR data from the Collider Detector at Fermilab at square-root s = 1.8 TeV. The observed asymmetry is well described by most of the available parton distributions. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. BRANDEIS UNIV,WALTHAM,MA 02254. UNIV CHICAGO,CHICAGO,IL 60637. FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. IST NAZL FIS NUCL,LAB NAZL FRASCATI,FRASCATI,ITALY. HARVARD UNIV,CAMBRIDGE,MA 02138. UNIV ILLINOIS,URBANA,IL 61801. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV PADUA,IST NAZL FIS NUCL,I-35131 PADUA,ITALY. UNIV PENN,PHILADELPHIA,PA 19104. IST NAZL FIS NUCL,PISA,ITALY. SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY. PURDUE UNIV,W LAFAYETTE,IN 47907. UNIV ROCHESTER,ROCHESTER,NY 14627. ROCKEFELLER UNIV,NEW YORK,NY 10021. RUTGERS STATE UNIV,PISCATAWAY,NJ 08854. TEXAS A&M UNIV SYST,COLLEGE STN,TX 77843. TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53706. UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN. RP ABE, F (reprint author), NATL LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 305,JAPAN. RI St.Denis, Richard/C-8997-2012; Chiarelli, Giorgio/E-8953-2012; Punzi, Giovanni/J-4947-2012 OI Chiarelli, Giorgio/0000-0001-9851-4816; Punzi, Giovanni/0000-0002-8346-9052 NR 12 TC 10 Z9 10 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 MAR 9 PY 1992 VL 68 IS 10 BP 1458 EP 1462 DI 10.1103/PhysRevLett.68.1458 PG 5 WC Physics, Multidisciplinary SC Physics GA HG680 UT WOS:A1992HG68000005 ER PT J AU ABE, F AMIDEI, D APOLLINARI, G ATAC, M AUCHINCLOSS, P BADEN, AR BACCHETTA, N BAILEY, MW BAMBERGER, A DEBARBARO, P BARNETT, BA BARBAROGALTIERI, A BARNES, VE BAUMANN, T BEDESCHI, F BEHRENDS, S BELFORTE, S BELLETTINI, G BELLINGER, J BENJAMIN, D BENSINGER, J BERETVAS, A BERGE, JP BERTOLUCCI, S BHADRA, S BINKLEY, M BLAIR, R BLOCKER, C BOLOGNESI, V BOOTH, AW BOSWELL, C BRANDENBURG, G BROWN, D BUCKLEYGEER, E BUDD, HS BUSETTO, G BYONWAGNER, A BYRUM, KL CAMPAGNARI, C CAMPBELL, M CANER, A CAREY, R CARITHERS, W CARLSMITH, D CARROLL, JT CASHMORE, R CASTRO, A CERVELLI, F CHADWICK, K CHIARELLI, G CHINOWSKY, W CIHANGIR, S CLARK, AG CONNOR, D CONTRERAS, M COOPER, J CORDELLI, M CRANE, D CURATOLO, M DAY, C DEJONGH, F DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DERWENT, PF DEVLIN, T DIBITONTO, D DICKSON, M DRUCKER, RB EINSWEILER, K ELIAS, JE ELY, R ENO, S ERREDE, S ESPOSITO, B FLAUGHER, B FOSTER, GW FRANKLIN, M FREEMAN, J FRISCH, H FUESS, T FUKUI, Y FUNAYAMA, Y GARFINKEL, AF GAUTHIER, A GEER, S GERDES, DW GIANNETTI, P GIOKARIS, N GIROMINI, P GLADNEY, L GOLD, M GOULIANOS, K GRASSMANN, H GROSSOPILCHER, C HABER, C HAHN, SR HANDLER, R HARA, K HARRIS, RM HAUSER, J HAWK, C HESSING, T HOLLEBEEK, R HOLLOWAY, L HU, P HUBBARD, B HUFFMAN, BT HUGHES, R HURST, P HUTH, J HYLEN, J INCAGLI, M INO, T ISO, H JENSEN, H JESSOP, CP JOHNSON, RP JOSHI, U KADEL, RW KAMON, T KANDA, S KARDELIS, DA KARLINER, I KEARNS, E KEEBLE, L KEPHART, R KESTEN, P KEUP, RM KEUTELIAN, H KIM, D KIM, S KIRSCH, L KONDO, K KONIGSBERG, J KOVACS, E KUHLMANN, SE KUNS, E LAASANEN, AT LAMOUREUX, JI LEONE, S LEWIS, J LI, W LIMON, P LISS, TM LOCKYER, N LUCHINI, CB LUKENS, P MAAS, P MAESHIMA, K MANGANO, M MARRINER, JP MARIOTTI, M MARKELOFF, R MARKOSKY, LA MATTINGLY, R MCINTYRE, P MENZIONE, A MEYER, T MIKAMO, S MILLER, M MIMASHI, T MISCETTI, S MISHINA, M MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A NAKAE, LF NAKANO, I NELSON, C NEWMANHOLMES, C NG, JST NINOMIYA, M NODULMAN, L OGAWA, S PAOLETTI, R PARA, A PARE, E PARK, S PATRICK, J PHILLIPS, TJ PTOHOS, F PLUNKETT, R PONDROM, L PROUDFOOT, J PUNZI, G QUARRIE, D RAGAN, K REDLINGER, G RHOADES, J ROACH, M RIMONDI, F RISTORI, L RODRIGO, T ROHALY, T ROODMAN, A SAKUMOTO, WK SANSONI, A SARD, RD SAVOYNAVARRO, A SCARPINE, V SCHLABACH, P SCHMIDT, EE SCHNEIDER, O SCHUB, MH SCHWITTERS, R SCRIBANO, A SEGLER, S SEIYA, Y SEKIGUCHI, M SHAPIRO, M SHAW, NM SHEAFF, M SHOCHET, M SIEGRIST, J SINERVO, P SKARHA, J SLIWA, K SMITH, DA SNIDER, FD SONG, L SPAHN, M SPHICAS, P STDENIS, R STEFANINI, A SULLIVAN, G SWARTZ, RL TAKANO, M TARTARELLI, F TAKIKAWA, K TAREM, S THERIOT, D TIMKO, M TIPTON, P TKACZYK, S TOLLESTRUP, A TONNISON, J TRISCHUK, W TURINI, N TSAY, Y UKEGAWA, F UNDERWOOD, D VEJCIK, S VIDAL, R WAGNER, RG WAGNER, RL WAINER, N WALSH, J WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WHITE, SN WICKLUND, AB WILLIAMS, HH WINER, BL WYSS, J YAGIL, A YAMASHITA, A YASUOKA, K YEH, GP YOH, J YOKOYAMA, M YUN, JC ZANETTI, A ZETTI, F ZUCCHELLI, S AF ABE, F AMIDEI, D APOLLINARI, G ATAC, M AUCHINCLOSS, P BADEN, AR BACCHETTA, N BAILEY, MW BAMBERGER, A DEBARBARO, P BARNETT, BA BARBAROGALTIERI, A BARNES, VE BAUMANN, T BEDESCHI, F BEHRENDS, S BELFORTE, S BELLETTINI, G BELLINGER, J BENJAMIN, D BENSINGER, J BERETVAS, A BERGE, JP BERTOLUCCI, S BHADRA, S BINKLEY, M BLAIR, R BLOCKER, C BOLOGNESI, V BOOTH, AW BOSWELL, C BRANDENBURG, G BROWN, D BUCKLEYGEER, E BUDD, HS BUSETTO, G BYONWAGNER, A BYRUM, KL CAMPAGNARI, C CAMPBELL, M CANER, A CAREY, R CARITHERS, W CARLSMITH, D CARROLL, JT CASHMORE, R CASTRO, A CERVELLI, F CHADWICK, K CHIARELLI, G CHINOWSKY, W CIHANGIR, S CLARK, AG CONNOR, D CONTRERAS, M COOPER, J CORDELLI, M CRANE, D CURATOLO, M DAY, C DEJONGH, F DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DERWENT, PF DEVLIN, T DIBITONTO, D DICKSON, M DRUCKER, RB EINSWEILER, K ELIAS, JE ELY, R ENO, S ERREDE, S ESPOSITO, B FLAUGHER, B FOSTER, GW FRANKLIN, M FREEMAN, J FRISCH, H FUESS, T FUKUI, Y FUNAYAMA, Y GARFINKEL, AF GAUTHIER, A GEER, S GERDES, DW GIANNETTI, P GIOKARIS, N GIROMINI, P GLADNEY, L GOLD, M GOULIANOS, K GRASSMANN, H GROSSOPILCHER, C HABER, C HAHN, SR HANDLER, R HARA, K HARRIS, RM HAUSER, J HAWK, C HESSING, T HOLLEBEEK, R HOLLOWAY, L HU, P HUBBARD, B HUFFMAN, BT HUGHES, R HURST, P HUTH, J HYLEN, J INCAGLI, M INO, T ISO, H JENSEN, H JESSOP, CP JOHNSON, RP JOSHI, U KADEL, RW KAMON, T KANDA, S KARDELIS, DA KARLINER, I KEARNS, E KEEBLE, L KEPHART, R KESTEN, P KEUP, RM KEUTELIAN, H KIM, D KIM, S KIRSCH, L KONDO, K KONIGSBERG, J KOVACS, E KUHLMANN, SE KUNS, E LAASANEN, AT LAMOUREUX, JI LEONE, S LEWIS, J LI, W LIMON, P LISS, TM LOCKYER, N LUCHINI, CB LUKENS, P MAAS, P MAESHIMA, K MANGANO, M MARRINER, JP MARIOTTI, M MARKELOFF, R MARKOSKY, LA MATTINGLY, R MCINTYRE, P MENZIONE, A MEYER, T MIKAMO, S MILLER, M MIMASHI, T MISCETTI, S MISHINA, M MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A NAKAE, LF NAKANO, I NELSON, C NEWMANHOLMES, C NG, JST NINOMIYA, M NODULMAN, L OGAWA, S PAOLETTI, R PARA, A PARE, E PARK, S PATRICK, J PHILLIPS, TJ PTOHOS, F PLUNKETT, R PONDROM, L PROUDFOOT, J PUNZI, G QUARRIE, D RAGAN, K REDLINGER, G RHOADES, J ROACH, M RIMONDI, F RISTORI, L RODRIGO, T ROHALY, T ROODMAN, A SAKUMOTO, WK SANSONI, A SARD, RD SAVOYNAVARRO, A SCARPINE, V SCHLABACH, P SCHMIDT, EE SCHNEIDER, O SCHUB, MH SCHWITTERS, R SCRIBANO, A SEGLER, S SEIYA, Y SEKIGUCHI, M SHAPIRO, M SHAW, NM SHEAFF, M SHOCHET, M SIEGRIST, J SINERVO, P SKARHA, J SLIWA, K SMITH, DA SNIDER, FD SONG, L SPAHN, M SPHICAS, P STDENIS, R STEFANINI, A SULLIVAN, G SWARTZ, RL TAKANO, M TARTARELLI, F TAKIKAWA, K TAREM, S THERIOT, D TIMKO, M TIPTON, P TKACZYK, S TOLLESTRUP, A TONNISON, J TRISCHUK, W TURINI, N TSAY, Y UKEGAWA, F UNDERWOOD, D VEJCIK, S VIDAL, R WAGNER, RG WAGNER, RL WAINER, N WALSH, J WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WHITE, SN WICKLUND, AB WILLIAMS, HH WINER, BL WYSS, J YAGIL, A YAMASHITA, A YASUOKA, K YEH, GP YOH, J YOKOYAMA, M YUN, JC ZANETTI, A ZETTI, F ZUCCHELLI, S TI SEARCH FOR NEW GAUGE BOSONS IN PBARP COLLISIONS AT SQUARE-ROOT-S=1.8TEV SO PHYSICAL REVIEW LETTERS LA English DT Article ID VECTOR-BOSON; E6 MODELS; MASS AB We have searched for the production of a neutral gauge boson (Z') with mass above 100 GeV/c2 in ppBAR collisions with the Collider Detector at Fermilab. We present a 95% confidence level (C.L.) limit on the Z' --> mu+-mu- production cross section. We combine the Z' limit with that from our previous dielectron search; the combined result sets a limit of M(z') > 412 GeV/c2 (95% C.L.), assuming standard-model coupling strengths. In addition, the absence of any evidence for an effective muon-quark contact interaction is used to set a lower limit of 1.6 TeV (95% C.L.) on an associated muon-quark compositeness scale. C1 ARGONNE NATL LAB, ARGONNE, IL 60439 USA. UNIV CHICAGO, CHICAGO, IL 60637 USA. FERMI NATL ACCELERATOR LAB, BATAVIA, IL 60510 USA. IST NAZL FIS NUCL, LAB NAZL FRASCATI, FRASCATI, ITALY. UNIV PADUA, IST NAZL FIS NUCL, I-35131 PADUA, ITALY. UNIV TSUKUBA, TSUKUBA, IBARAKI 305, JAPAN. HARVARD UNIV, CAMBRIDGE, MA 02138 USA. UNIV ILLINOIS, URBANA, IL 61801 USA. JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. UNIV PENN, PHILADELPHIA, PA 19104 USA. IST NAZL FIS NUCL, PISA, ITALY. SCUOLA NORMALE SUPER PISA, I-56100 PISA, ITALY. PURDUE UNIV, W LAFAYETTE, IN 47907 USA. UNIV ROCHESTER, ROCHESTER, NY 14627 USA. RUTGERS STATE UNIV, PISCATAWAY, NJ 08854 USA. ROCKEFELLER UNIV, NEW YORK, NY 10021 USA. TEXAS A&M UNIV SYST, COLLEGE STN, TX 77843 USA. TUFTS UNIV, MEDFORD, MA 02155 USA. UNIV WISCONSIN, MADISON, WI 53706 USA. RP ABE, F (reprint author), NATL LAB HIGH ENERGY PHYS, TSUKUBA, IBARAKI 305, JAPAN. RI St.Denis, Richard/C-8997-2012; Chiarelli, Giorgio/E-8953-2012; Punzi, Giovanni/J-4947-2012 OI Chiarelli, Giorgio/0000-0001-9851-4816; Punzi, Giovanni/0000-0002-8346-9052 NR 28 TC 52 Z9 53 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 MAR 9 PY 1992 VL 68 IS 10 BP 1463 EP 1467 DI 10.1103/PhysRevLett.68.1463 PG 5 WC Physics, Multidisciplinary SC Physics GA HG680 UT WOS:A1992HG68000006 ER PT J AU ARMSTRONG, TA BETTONI, D BHARADWAJ, V BIINO, C BORREANI, G BROEMMELSIEK, D BUZZO, A CALABRESE, R CECCUCCI, A CESTER, R CHURCH, MD DALPIAZ, P DALPIAZ, PF FAST, JE FERRONI, S GINSBURG, CM GOLLWITZER, KE HAHN, AA HASAN, MA HSUEH, SY LEWIS, RA LUPPI, E MACRI, M MAJEWSKA, A MANDELKERN, MA MARCHETTO, F MARINELLI, M MARQUES, JL MARSH, W MARTINI, M MASUZAWA, M MENICHETTI, E MIGLIORI, A MUSSA, R PALESTINI, S PASTRONE, N PATRIGNANI, C PEOPLES, J PESANDO, L PETRUCCI, F PIA, MG PORDES, S RAPIDIS, PA RAY, RE REID, JD RINAUDO, G ROSEN, JL SANTRONI, A SARMIENTO, M SAVRIE, M SCHULTZ, J SETH, KK SMITH, GA TECCHIO, L TOMMASINI, F TROKENHEIM, S WEBER, MF WERKEMA, SJ ZHAO, JL ZITO, M AF ARMSTRONG, TA BETTONI, D BHARADWAJ, V BIINO, C BORREANI, G BROEMMELSIEK, D BUZZO, A CALABRESE, R CECCUCCI, A CESTER, R CHURCH, MD DALPIAZ, P DALPIAZ, PF FAST, JE FERRONI, S GINSBURG, CM GOLLWITZER, KE HAHN, AA HASAN, MA HSUEH, SY LEWIS, RA LUPPI, E MACRI, M MAJEWSKA, A MANDELKERN, MA MARCHETTO, F MARINELLI, M MARQUES, JL MARSH, W MARTINI, M MASUZAWA, M MENICHETTI, E MIGLIORI, A MUSSA, R PALESTINI, S PASTRONE, N PATRIGNANI, C PEOPLES, J PESANDO, L PETRUCCI, F PIA, MG PORDES, S RAPIDIS, PA RAY, RE REID, JD RINAUDO, G ROSEN, JL SANTRONI, A SARMIENTO, M SAVRIE, M SCHULTZ, J SETH, KK SMITH, GA TECCHIO, L TOMMASINI, F TROKENHEIM, S WEBER, MF WERKEMA, SJ ZHAO, JL ZITO, M TI PRECISION-MEASUREMENTS OF CHARMONIUM STATES FORMED IN PBARP ANNIHILATION SO PHYSICAL REVIEW LETTERS LA English DT Article ID PSI AB Fermilab experiment E-760 studies the resonant formation of charmonium states in proton-antiproton interactions using a hydrogen gas-jet target in the Antiproton Accumulator ring at Fermilab. Precision measurements of the mass and width of the charmonium states chi-c1,chi-c2, a direct measurement of the psi' width, and a new precision measurement of the J/psi mass are presented. C1 IST NAZL FIS NUCL,I-16146 GENOA,ITALY. FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV FERRARA,I-44100 FERRARA,ITALY. IST NAZL FIS NUCL,I-44100 FERRARA,ITALY. UNIV GENOA,I-16146 GENOA,ITALY. UNIV CALIF IRVINE,IRVINE,CA 92717. NORTHWESTERN UNIV,EVANSTON,IL 60201. UNIV TURIN,I-10125 TURIN,ITALY. IST NAZL FIS NUCL,TURIN,ITALY. RP ARMSTRONG, TA (reprint author), PENN STATE UNIV,UNIV PK,PA 16802, USA. RI Pia, Maria Grazia/C-7034-2012; Patrignani, Claudia/C-5223-2009; Luppi, Eleonora/A-4902-2015; Calabrese, Roberto/G-4405-2015 OI Pia, Maria Grazia/0000-0002-3579-9639; Patrignani, Claudia/0000-0002-5882-1747; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400 NR 7 TC 34 Z9 34 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 MAR 9 PY 1992 VL 68 IS 10 BP 1468 EP 1471 DI 10.1103/PhysRevLett.68.1468 PG 4 WC Physics, Multidisciplinary SC Physics GA HG680 UT WOS:A1992HG68000007 ER PT J AU WANG, XN GYULASSY, M AF WANG, XN GYULASSY, M TI GLUON SHADOWING AND JET QUENCHING IN A+A COLLISIONS AT SQUARE-ROOT-S=200A GEV SO PHYSICAL REVIEW LETTERS LA English DT Article ID NUCLEUS-NUCLEUS COLLISIONS; LUND MONTE-CARLO; FRAGMENTATION MODEL; HADRON-NUCLEUS; E+E-PHYSICS AB The sensitivity of moderate P(T) less-than-or-similar-to 8 GeV/c singles inclusive spectra in nuclear collisions to gluon shadowing and jet quenching is estimated using the HIJING Monte Carlo model. We show how the systematic study of the nuclear dependence of those spectra in p + A can be used to determine the magnitude of gluon shadowing and how the enhanced suppression in A + A would provide information on the energy loss mechanisms in dense partonic matter. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. RP WANG, XN (reprint author), DUKE UNIV,DEPT PHYS,DURHAM,NC 27706, USA. OI Wang, Xin-Nian/0000-0002-9734-9967 NR 32 TC 597 Z9 604 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 MAR 9 PY 1992 VL 68 IS 10 BP 1480 EP 1483 DI 10.1103/PhysRevLett.68.1480 PG 4 WC Physics, Multidisciplinary SC Physics GA HG680 UT WOS:A1992HG68000010 ER PT J AU PICKLESIMER, A RICE, RA BRANDENBURG, R AF PICKLESIMER, A RICE, RA BRANDENBURG, R TI TRINUCLEAR-DELTA COMPONENTS AND THE TRITON BINDING-ENERGY SO PHYSICAL REVIEW LETTERS LA English DT Article ID 3-NUCLEON FORCE; NUCLEAR-MATTER; FREEDOM AB The influence of trinuclear one-DELTA and DELTA-DELTA-components on the triton binding energy is studied nonperturbatively using the Hannover and Argonne force models. This is the first such study of DELTA-DELTA-effects, and these are found to be appreciable. In the Hannover model, repulsive DELTA-dispersive effects and attractive DELTA-three-body-force effects cancel almost exactly, yielding little net DELTA-effect. A similar result obtains for the Argonne model, yielding a net A repulsive effect of only approximately 380 keV. Implications for current approaches which make simplifying assumptions about DELTA-effects are indicated. C1 UNIV BASEL, INST PHYS, CH-3056 BASEL, SWITZERLAND. PURDUE UNIV, DEPT PHYS, W LAFAYETTE, IN 47907 USA. RP PICKLESIMER, A (reprint author), UNIV CALIF LOS ALAMOS SCI LAB, DIV PHYS, LOS ALAMOS, NM 87545 USA. NR 25 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 MAR 9 PY 1992 VL 68 IS 10 BP 1484 EP 1487 DI 10.1103/PhysRevLett.68.1484 PG 4 WC Physics, Multidisciplinary SC Physics GA HG680 UT WOS:A1992HG68000011 ER PT J AU JUDSON, RS RABITZ, H AF JUDSON, RS RABITZ, H TI TEACHING LASERS TO CONTROL MOLECULES SO PHYSICAL REVIEW LETTERS LA English DT Article AB We simulate a method to teach a laser pulse sequences to excite specified molecular states. We use a learning procedure to direct the production of pulses based on "fitness" information provided by a laboratory measurement device. Over a series of pulses the algorithm learns an optimal sequence. The experimental apparatus, which consists of a laser, a sample of molecules, and a measurement device, acts as an analog computer that solves Schrodinger's equation exactly, in real time. We simulate an apparatus that learns to excite specified rotational states in a diatomic molecule. C1 PRINCETON UNIV,DEPT CHEM,PRINCETON,NJ 08544. RP JUDSON, RS (reprint author), SANDIA NATL LABS,CTR COMPUTAT ENGN,LIVERMORE,CA 94551, USA. OI Judson, Richard/0000-0002-2348-9633 NR 11 TC 1211 Z9 1222 U1 5 U2 49 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 MAR 9 PY 1992 VL 68 IS 10 BP 1500 EP 1503 DI 10.1103/PhysRevLett.68.1500 PG 4 WC Physics, Multidisciplinary SC Physics GA HG680 UT WOS:A1992HG68000015 ER PT J AU HALSEY, TC MARTIN, JE ADOLF, D AF HALSEY, TC MARTIN, JE ADOLF, D TI RHEOLOGY OF ELECTRORHEOLOGICAL FLUIDS SO PHYSICAL REVIEW LETTERS LA English DT Article ID SUSPENSIONS AB We present experimental and theoretical results on the shear thinning of electrorheological fluids. Rheological measurements on a model fluid consisting of monodisperse silica spheres immersed in a dielectric liquid show a power-law dependence-mu is-proportional-to gamma(-DELTA) of the apparent viscosity-mu on the strain rate-gamma, with DELTA in the range DELTA = 0.68-0.93. We present a theoretical treatment of steady-state cluster formation in applied electric and shear fields, which correctly predicts the observed power-law shear thinning, albeit with an exponent DELTA = 2/3 . We observe no true yield stress in this material. C1 UNIV CHICAGO,DEPT PHYS,CHICAGO,IL 60637. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP HALSEY, TC (reprint author), UNIV CHICAGO,JAMES FRANCK INST,5640 S ELLIS AVE,CHICAGO,IL 60637, USA. NR 10 TC 133 Z9 134 U1 2 U2 12 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 MAR 9 PY 1992 VL 68 IS 10 BP 1519 EP 1522 DI 10.1103/PhysRevLett.68.1519 PG 4 WC Physics, Multidisciplinary SC Physics GA HG680 UT WOS:A1992HG68000020 ER PT J AU RAX, JM WHITE, RB AF RAX, JM WHITE, RB TI EFFECTIVE DIFFUSION AND NONLOCAL HEAT-TRANSPORT IN A STOCHASTIC MAGNETIC-FIELD SO PHYSICAL REVIEW LETTERS LA English DT Article ID ANOMALOUS DIFFUSION AB Heat transport in a stochastic magnetic-field configuration is investigated analytically and numerically with two complementary models: a Chirikov-Taylor map model and a Gaussian random-field model. Numerical solution of the Chirikov-Taylor model shows a short-time nonlocal regime, but at large time the Rechester-Rosenbluth effective diffusion regime is confirmed numerically. The Gaussian model, for which the associated nonlocal propagator is calculated, describes this short-time behavior. C1 EURATOM,CEA,F-13108 ST PAUL DURANCE,FRANCE. RP RAX, JM (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,PRINCETON,NJ 08544, USA. RI White, Roscoe/D-1773-2013 OI White, Roscoe/0000-0002-4239-2685 NR 17 TC 45 Z9 45 U1 0 U2 6 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 MAR 9 PY 1992 VL 68 IS 10 BP 1523 EP 1526 DI 10.1103/PhysRevLett.68.1523 PG 4 WC Physics, Multidisciplinary SC Physics GA HG680 UT WOS:A1992HG68000021 ER PT J AU SAMARA, GA VOOK, DW GIBBONS, JF AF SAMARA, GA VOOK, DW GIBBONS, JF TI BREATHING-MODE RELAXATION ASSOCIATED WITH ELECTRON-EMISSION AND CAPTURE PROCESSES OF EL2 IN GAAS SO PHYSICAL REVIEW LETTERS LA English DT Article ID ARSENIC-ANTISITE DEFECT; PRESSURE-DEPENDENCE; HYDROSTATIC-PRESSURE; SEMICONDUCTORS; LEVEL; IDENTIFICATION; TRANSITION; SILICON AB Analysis of the effects of hydrostatic pressure on the electronic emission and capture properties of the (0/+) and (+/++) deep levels of the EL2 defect in GaAs leads to the following conclusions: (1) Both levels move higher in the band gap with pressure; (2) relatively large inward (outward) lattice relaxations accompany electron emission (capture) from (by) these levels; and (3) the magnitudes of the relaxations agree quantitatively with theoretical results which identify EL2 as the As antisite defect. These results which emphasize the antibonding character of the orbitals which describe EL 2 are consistent with this identification. C1 STANFORD UNIV,STANFORD,CA 94305. RP SAMARA, GA (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 18 TC 15 Z9 15 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 9 PY 1992 VL 68 IS 10 BP 1582 EP 1585 DI 10.1103/PhysRevLett.68.1582 PG 4 WC Physics, Multidisciplinary SC Physics GA HG680 UT WOS:A1992HG68000036 ER PT J AU ROMERO, DB PORTER, CD TANNER, DB FORRO, L MANDRUS, D MIHALY, L CARR, GL WILLIAMS, GP AF ROMERO, DB PORTER, CD TANNER, DB FORRO, L MANDRUS, D MIHALY, L CARR, GL WILLIAMS, GP TI QUASI-PARTICLE DAMPING IN BI2SR2CACU2O8 AND BI2SR2CUO6 SO PHYSICAL REVIEW LETTERS LA English DT Article ID NORMAL-STATE; CU-O; GAP; SUPERCONDUCTORS; CONDUCTIVITY; CRYSTAL AB The low-frequency conductivity sigma-1(omega) of Bi2Sr2CaCu2O8 has a Drude-like component below T(c). Interpreting the width of this component as the quasiparticle relaxation rate (tau--1), we find that tau--1 decreases dramatically just below T(c), in sharp contrast with the T-linear tau--1 above T(c) and in Bi2Sr2CuO6. This decrease causes a peak in sigma-1(omega --> 0, T) for T just below T(c), a peak which is due to the scattering rate and not to pair coherence effects, consistent with the lack of a coherence peak in the NMR relaxation rate. This result implies that the excitations which scatter the carriers are suppressed below T(c). C1 UNIV FLORIDA,DEPT PHYS,GAINESVILLE,FL 32611. SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794. GRUMMAN CORP RES CTR,BETHPAGE,NY 11714. BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE,UPTON,NY 11973. RI Mandrus, David/H-3090-2014 NR 25 TC 140 Z9 140 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 MAR 9 PY 1992 VL 68 IS 10 BP 1590 EP 1593 DI 10.1103/PhysRevLett.68.1590 PG 4 WC Physics, Multidisciplinary SC Physics GA HG680 UT WOS:A1992HG68000038 ER PT J AU BECK, RG FARRELL, DE RICE, JP GINSBERG, DM KOGAN, VG AF BECK, RG FARRELL, DE RICE, JP GINSBERG, DM KOGAN, VG TI MELTING OF THE ABRIKOSOV FLUX LATTICE IN ANISOTROPIC SUPERCONDUCTORS SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-TC SUPERCONDUCTORS; SINGLE-CRYSTAL YBA2CU3O7; MECHANICAL MEASUREMENTS; BI2.2SR2CA0.8CU2O8 AB It has been proposed that the Abrikosov flux lattice in high-T(c), superconductors is melt over a significant fraction of the phase diagram. We provide a thermodynamic argument which establishes that the angular dependence of the melting temperature is controlled by the superconducting mass anisotropy. Using a low-frequency torsional-oscillator technique, this relationship has been tested in untwinned single-crystal YBa2Cu3O7-delta. The results offer decisive support for the melting proposal. C1 UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801. UNIV ILLINOIS,MAT RES LAB,URBANA,IL 61801. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. RP BECK, RG (reprint author), CASE WESTERN RESERVE UNIV,DEPT PHYS,CLEVELAND,OH 44106, USA. NR 22 TC 104 Z9 104 U1 1 U2 6 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 MAR 9 PY 1992 VL 68 IS 10 BP 1594 EP 1596 DI 10.1103/PhysRevLett.68.1594 PG 3 WC Physics, Multidisciplinary SC Physics GA HG680 UT WOS:A1992HG68000039 ER PT J AU JIN, DS CARTER, SA ELLMAN, B ROSENBAUM, TF HINKS, DG AF JIN, DS CARTER, SA ELLMAN, B ROSENBAUM, TF HINKS, DG TI UNIAXIAL-STRESS ANISOTROPY OF THE DOUBLE SUPERCONDUCTING TRANSITION IN UPT3 SO PHYSICAL REVIEW LETTERS LA English DT Article ID PHASE-DIAGRAM; TEMPERATURE-DEPENDENCE; MAGNETIC-FIELD; ORDER; HEAT; SYMMETRY; PRESSURE AB We study the specific heat of single-crystal UPt3 for uniaxial stress 0 -less-than-or-equal-to S less-than-or-equal-to 4 kbar. For S parallel-to c, the lower and upper superconducting transitions move towards each other in temperature and merge by S = 2 kbar and T = 485 mK. In the normal state, the Sommerfeld constant-gamma increases 12% by 2 kbar and then plateaus. By contrast, for S parallel-to a, gamma-decreases steadily and the onset T(c)'s of the two superconducting transitions remain essentially unchanged, although the specific-heat peaks broaden markedly. Residual strain in the basal plane may account for some crystals of UPt3 showing only one broad superconducting transition. C1 UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP JIN, DS (reprint author), UNIV CHICAGO,JAMES FRANCK INST,CHICAGO,IL 60637, USA. NR 27 TC 36 Z9 36 U1 2 U2 6 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 MAR 9 PY 1992 VL 68 IS 10 BP 1597 EP 1600 DI 10.1103/PhysRevLett.68.1597 PG 4 WC Physics, Multidisciplinary SC Physics GA HG680 UT WOS:A1992HG68000040 ER PT J AU CANRIGHT, GS ROJO, AG AF CANRIGHT, GS ROJO, AG TI SOME CONSEQUENCES OF PT SYMMETRY FOR OPTICAL-ROTATION EXPERIMENTS SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-TC SUPERCONDUCTORS; TIME-REVERSAL SYMMETRY; THIN-FILMS AB We perform a general symmetry analysis of optical experiments on samples in the "PT state," that is, samples for which 3D inversion symmetry P and time inversion symmetry T are each broken, but which are invariant under the product PT. We show that PT symmetry is compatible with all known results on optical rotation in the high-temperature superconductors. We also find a unique and accessible experimental signature for the PT state. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP CANRIGHT, GS (reprint author), UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996, USA. NR 24 TC 25 Z9 25 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 MAR 9 PY 1992 VL 68 IS 10 BP 1601 EP 1604 DI 10.1103/PhysRevLett.68.1601 PG 4 WC Physics, Multidisciplinary SC Physics GA HG680 UT WOS:A1992HG68000041 ER PT J AU GRIFFIN, PA AF GRIFFIN, PA TI TRANSVERSE LATTICE CONSTRUCTION OF 2+1 CHERN-SIMONS THEORY SO MODERN PHYSICS LETTERS A LA English DT Article AB A transverse lattice model, with one lattice dimension and two continuum dimensions, is constructed by introducing Wess-Zumino terms into the gauged (1 + 1)-dimensional nonlinear sigma model action of the link fields. Its continuum limit is the pure Chern-Simons gauge theory in 2 + 1 dimensions. The lattice model is quantized, and some simple expectation values for Wilson loops on M2 x S1 are evaluated. This construction provides an explicit connection between Chem-Simons theory and the gauged Wess-Zumino-Witten model. RP GRIFFIN, PA (reprint author), FERMI NATL ACCELERATOR LAB,THEORY GRP,MS 106,POB 500,BATAVIA,IL 60510, USA. NR 0 TC 9 Z9 9 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0217-7323 J9 MOD PHYS LETT A JI Mod. Phys. Lett. A PD MAR 7 PY 1992 VL 7 IS 7 BP 601 EP 610 DI 10.1142/S0217732392000574 PG 10 WC Physics, Nuclear; Physics, Particles & Fields; Physics, Mathematical SC Physics GA HL019 UT WOS:A1992HL01900007 ER PT J AU GRAY, JA PAUL, PH DURANT, JL AF GRAY, JA PAUL, PH DURANT, JL TI ELECTRONIC QUENCHING RATES FOR NO(A2-SIGMA+) MEASURED IN A SHOCK-TUBE SO CHEMICAL PHYSICS LETTERS LA English DT Article ID LASER-INDUCED FLUORESCENCE; NITRIC-OXIDE; RYDBERG STATES; NO; MECHANISM AB We report rate coefficients for electronic quenching of NO (A 2-SIGMA+) by NO(X 2-PI), CO2, Ar and He measured at high temperature behind reproducible shock waves. NO and CO2 are efficient quenchers at temperatures between 300 and 2100 K while the rare gases quench much less efficiently. We develop a model to predict the temperature dependence of NO(A 2-SIGMA+) quenching by collision partners that have a large electron affinity and thereby enable a charge-transfer complex (NO+X-) to mediate the transition between the A 2-SIGMA+ nu' = 0 and X 2-PI states of NO. RP GRAY, JA (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551, USA. NR 21 TC 28 Z9 28 U1 0 U2 1 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 MAR 6 PY 1992 VL 190 IS 3-4 BP 266 EP 270 DI 10.1016/0009-2614(92)85337-A PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA HJ837 UT WOS:A1992HJ83700020 ER PT J AU KIM, SH AF KIM, SH TI BETA-RIBBON - A NEW DNA RECOGNITION MOTIF SO SCIENCE LA English DT Editorial Material ID BINDING; PROTEIN; RNA; MODEL C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP KIM, SH (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. NR 12 TC 14 Z9 14 U1 0 U2 1 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD MAR 6 PY 1992 VL 255 IS 5049 BP 1217 EP 1218 DI 10.1126/science.1546321 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HG677 UT WOS:A1992HG67700031 PM 1546321 ER PT J AU PILAT, JF AF PILAT, JF TI IRAQ AND THE FUTURE OF NUCLEAR NONPROLIFERATION - THE ROLES OF INSPECTIONS AND TREATIES SO SCIENCE LA English DT Article AB In the aftermath of the Gulf War, revelations about Iraq's extensive program to develop nuclear weapons challenge the future of the international nuclear nonproliferation regime. Until inspections sanctioned by the U.N. Security Council began, Iraq's violations of its obligations under the Treaty on the Nonproliferation of Nuclear Weapons and its related safeguards agreement with the International Atomic Energy Agency went undetected. The ultimate impact of Iraq's behavior on the regime cannot yet be determined, but there is now an opportunity to improve safeguards and other aspects of the regime, including strengthening export controls and proliferation intelligence collection and sharing and the development of appropriate response capabilities. RP PILAT, JF (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,CTR NATL SECUR STUDIES,LOS ALAMOS,NM 87545, USA. NR 16 TC 2 Z9 2 U1 0 U2 0 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD MAR 6 PY 1992 VL 255 IS 5049 BP 1224 EP 1229 DI 10.1126/science.255.5049.1224 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HG677 UT WOS:A1992HG67700033 PM 17816828 ER PT J AU MAHADEVAN, M TSILFIDIS, C SABOURIN, L SHUTLER, G AMEMIYA, C JANSEN, G NEVILLE, C NARANG, M BARCELO, J OHOY, K LEBLOND, S EARLEMACDONALD, J DEJONG, PJ WIERINGA, B KORNELUK, RG AF MAHADEVAN, M TSILFIDIS, C SABOURIN, L SHUTLER, G AMEMIYA, C JANSEN, G NEVILLE, C NARANG, M BARCELO, J OHOY, K LEBLOND, S EARLEMACDONALD, J DEJONG, PJ WIERINGA, B KORNELUK, RG TI MYOTONIC-DYSTROPHY MUTATION - AN UNSTABLE CTG REPEAT IN THE 3' UNTRANSLATED REGION OF THE GENE SO SCIENCE LA English DT Article AB Myotonic dystrophy (DM) is the most common inherited neuromuscular disease in adults, with a global incidence of 1 in 8000 individuals. DM is an autosomal dominant, multisystemic disorder characterized primarily by myotonia and progressive muscle weakness. Genomic and complementary DNA probes that map to a 10-kilobase Eco RI genomic fragment from human chromosome 19q13.3 have been used to detect a variable length polymorphism in individuals with DM. Increases in the size of the allele in patients with DM are now shown to be due to an increased number of trinucleotide CTG repeats in the 3' untranslated region of a DM candidate gene. An increase in the severity of the disease in successive generations (genetic anticipation) is accompanied by an increase in the number of trinucleotide repeats. Nearly all cases of DM (98 percent or 253 of 258 individuals) displayed expansion of the CTG repeat region. These results suggest that DM is primarily caused by mutations that generate an amplification of a specific CTG repeat. C1 UNIV OTTAWA,DEPT MICROBIOL & IMMUNOL,OTTAWA K1H 8L1,ONTARIO,CANADA. CHILDRENS HOSP EASTERN ONTARIO,RES INST,OTTAWA K1H 8L1,ONTARIO,CANADA. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. CATHOLIC UNIV NIJMEGEN,DEPT HUMAN GENET,6500 HB NIJMEGEN,NETHERLANDS. CATHOLIC UNIV NIJMEGEN,DEPT CELL BIOL & HISTOL,6500 HB NIJMEGEN,NETHERLANDS. RI Wieringa, Berend/A-5346-2011 OI Wieringa, Berend/0000-0001-9192-8020 NR 15 TC 1163 Z9 1179 U1 2 U2 32 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD MAR 6 PY 1992 VL 255 IS 5049 BP 1253 EP 1255 DI 10.1126/science.1546325 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HG677 UT WOS:A1992HG67700042 PM 1546325 ER PT J AU FU, YH PIZZUTI, A FENWICK, RG KING, J RAJNARAYAN, S DUNNE, PW DUBEL, J NASSER, GA ASHIZAWA, T DEJONG, P WIERINGA, B KORNELUK, R PERRYMAN, MB EPSTEIN, HF CASKEY, CT AF FU, YH PIZZUTI, A FENWICK, RG KING, J RAJNARAYAN, S DUNNE, PW DUBEL, J NASSER, GA ASHIZAWA, T DEJONG, P WIERINGA, B KORNELUK, R PERRYMAN, MB EPSTEIN, HF CASKEY, CT TI AN UNSTABLE TRIPLET REPEAT IN A GENE RELATED TO MYOTONIC MUSCULAR-DYSTROPHY SO SCIENCE LA English DT Article ID DEPENDENT PROTEIN-KINASE AB Synthetic oligonucleotides containing GC-rich triplet sequences were used in a scanning strategy to identify unstable genetic sequences at the myotonic dystrophy (DM) locus. A highly polymorphic GCT repeat was identified and found to be unstable, with an increased number of repeats occurring in DM patients. In the case of severe congenital DM, the paternal triplet allele was inherited unaltered while the maternal, DM-associated allele was unstable. These studies suggest that the mutational mechanism leading to DM is triplet amplification, similar to that occurring in the fragile X syndrome. The triplet repeat sequence is within a gene (to be referred to as myotonin-protein kinase), which has a sequence similar to protein kinases. C1 BAYLOR COLL MED,INST MOLEC GENET,HOUSTON,TX 77030. BAYLOR COLL MED,CTR HUMAN GENOME,HOUSTON,TX 77030. BAYLOR COLL MED,DEPT NEUROL,HOUSTON,TX 77030. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. CATHOLIC UNIV NIJMEGEN,DEPT CELL BIOL & HISTOL,NIJMEGEN,NETHERLANDS. CHILDRENS HOSP EASTERN ONTARIO,DEPT GENET,OTTAWA K1H 8L1,ONTARIO,CANADA. BAYLOR COLL MED,DEPT CARDIOL,HOUSTON,TX 77030. BAYLOR COLL MED,HOWARD HUGHES MED INST,HOUSTON,TX 77030. RI Wieringa, Berend/A-5346-2011 OI Wieringa, Berend/0000-0001-9192-8020 FU NCRR NIH HHS [5-M01-RR00350]; NHGRI NIH HHS [P30-HG00210]; NHLBI NIH HHS [P50HL42267-01] NR 21 TC 1095 Z9 1116 U1 4 U2 30 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD MAR 6 PY 1992 VL 255 IS 5049 BP 1256 EP 1258 DI 10.1126/science.1546326 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HG677 UT WOS:A1992HG67700043 PM 1546326 ER PT J AU BURLEY, SK DAVID, PR SWEET, RM TAYLOR, A LIPSCOMB, WN AF BURLEY, SK DAVID, PR SWEET, RM TAYLOR, A LIPSCOMB, WN TI STRUCTURE DETERMINATION AND REFINEMENT OF BOVINE LENS LEUCINE AMINOPEPTIDASE AND ITS COMPLEX WITH BESTATIN SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE EXOPEPTIDASE; LEUCINE AMINOPEPTIDASE; BESTATIN; MULTIPLE ISOMORPHOUS REPLACEMENT; X-RAY CRYSTALLOGRAPHY ID SITE-SPECIFIC RECOMBINATION; MULTIWIRE AREA DETECTOR; RAY-DIFFRACTION DATA; LARGE UNIT CELLS; ESCHERICHIA-COLI; PROTEIN STRUCTURES; CRYSTALLOGRAPHIC REFINEMENT; METAL-IONS; EYE LENS; MACROMOLECULAR CRYSTALLOGRAPHY C1 HARVARD UNIV,GIBBS CHEM LAB,CAMBRIDGE,MA 02138. BRIGHAM & WOMENS HOSP,DEPT MED,BOSTON,MA 02115. BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. TUFTS UNIV,USDA,HUMAN NUTR RES CTR AGING,BOSTON,MA 02111. FU NIGMS NIH HHS [GM06920] NR 98 TC 189 Z9 191 U1 0 U2 2 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD MAR 5 PY 1992 VL 224 IS 1 BP 113 EP 140 DI 10.1016/0022-2836(92)90580-D PG 28 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA HJ808 UT WOS:A1992HJ80800010 PM 1548695 ER PT J AU MILDER, SJ BRUNSCHWIG, BS AF MILDER, SJ BRUNSCHWIG, BS TI FACTORS AFFECTING NONRADIATIVE DECAY - TEMPERATURE-DEPENDENCE OF THE PICOSECOND FLUORESCENCE LIFETIME OF PT2(POP)4(4-) SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID TRIPLET EXCITED-STATE; BINUCLEAR PLATINUM(II) PHOTOCHEMISTRY; RHODIUM ISOCYANIDE COMPLEXES; ELECTRON-TRANSFER PROCESSES; METAL-METAL INTERACTIONS; RESONANCE RAMAN-SPECTRA; ENERGY-GAP LAW; PHOTOPHYSICAL PROPERTIES; TETRAKIS(MU-PYROPHOSPHITO)DIPLATINUM(II) TETRAANION; ORGANOMETALLIC HYDRIDES AB The lifetime of the picosecond fluorescence of Pt2(pop)4(4-)(pop = mu-P2O5H2) has been observed to increase with decreasing temperature (e.g., from 40 ps at 290 K to 740 ps at 80 K in H2O:glycerol (1:2)). The longer lifetimes at the lower temperatures are attributed to a decrease in the rate of the nonradiative decay of the short-lived emissive state, 1A2u, to the long-lived emissive state, 3A2u, of the complex. The variation of the lifetime of the 1A2u state with temperature has been fit to two-channel expressions that include both a temperature-independent term and a term that is derived from a single-mode quantum treatment of nonradiative decay in either its normal or high-temperature limit. The temperature dependence of the lifetime in each solven yields sufficient information to define only three parameters, while the two-channel, single-mode quantum expression has five independent parameters. Thus, even when one of the five parameters is held constant, a range of values of the other four parameters gives reasonable fits to the data. When a two-channel expression with a single-mode quantum term in the high-temperature limit is used (k(obs) = k0 + (A/square-root RT) exp(-E(a)/RT)), the three independent parameters can be well defined in each solvent. In nondeuterated solvents the decay of the 1A2u state gives values of A that vary from 9.2 x 10(12) to 6.0 x 10(14) s-1, values of E(a) that vary from 890 to 1590 cm-1, values of k0 that are almost independent of solvent ((1.5 +/- 0.2) x 10(9) s-1), and low-temperature lifetimes that vary from 620 to 850 ps. Upon solvent deuteration, the low-temperature lifetime of the 1A2u state increases to 2170 ps. The temperature-dependent component of the 1A2u decay is attributed to a nonradiative pathway involving strong coupling between the fluorescent 1A2u (1d-sigma*p-sigma) state and a primarily ligand-field 3B2u (3d-sigma*d(x2-y2)) state; this pathway ultimately leads to population of the long-lived 3A2u (3d-sigma*p-sigma) state. The temperature-independent component of the 1A2u decay is dominated by a nonradiative pathway involving weak coupling between the 1A2u and 3A2u states in which the high-energy modes of the solvent are important accepting modes. C1 BROOKHAVEN NATL LAB, DEPT CHEM, UPTON, NY 11973 USA. RI Brunschwig, Bruce/G-4249-2011 NR 48 TC 25 Z9 25 U1 2 U2 15 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 5 PY 1992 VL 96 IS 5 BP 2189 EP 2196 DI 10.1021/j100184a030 PG 8 WC Chemistry, Physical SC Chemistry GA HG753 UT WOS:A1992HG75300030 ER PT J AU DOREY, N MATTIS, MP AF DOREY, N MATTIS, MP TI TROUBLE IN THE VALLEY - INSTANTONS AND MULTI-INSTANTONS IN ANOMALOUS SCATTERING SO PHYSICS LETTERS B LA English DT Article ID ELECTROWEAK INTERACTIONS; ENERGY AB The valley method is a nonperturbative tool for summing final-state corrections in high-energy baryon number (B) violation. We use it to analyze recent claims that multi-instanton chains dominate the B-violating cross section sigma(B) at energies for which the one-instanton contribution is still exponentially suppressed. We present a toy model in which this claim is incorrect, and is an artifact of retaining only nearest-neighbor instanton-anti-instanton forces. As a separate issue, we also examine the valley method itself, in the one-instanton sector. We show that for some choices of metric on configuration space, the valley bifurcates at a critical energy, at which point the smooth exponential rise of sigma(B) towards an observably large value apparently comes to a halt, and sigma(B) remains unobservably small. RP DOREY, N (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET T8,LOS ALAMOS,NM 87545, USA. NR 31 TC 10 Z9 10 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 MAR 5 PY 1992 VL 277 IS 3 BP 337 EP 344 DI 10.1016/0370-2693(92)90755-S PG 8 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HJ859 UT WOS:A1992HJ85900018 ER PT J AU ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOTNER, O BOUQUET, B BOURDARIOS, C BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P DASILVA, W DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DULINSKI, W EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FASSOULIOTIS, D FEINDT, M FENYUK, A ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F FORBES, KAJ FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A FRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B GUMENYUK, S GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIUKHIN, V KOSTRIKOV, M KOURKOUMELIS, C KRAMER, PH KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIEB, E LIKO, D LILLETHUN, E LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MENICHETTI, E MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V OESTERBERG, K OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMIRNOV, N SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TORASSA, E TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VILANOVA, D VITALE, L VLASOV, E VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J AF ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOTNER, O BOUQUET, B BOURDARIOS, C BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P DASILVA, W DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DULINSKI, W EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FASSOULIOTIS, D FEINDT, M FENYUK, A ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F FORBES, KAJ FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A FRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B GUMENYUK, S GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIUKHIN, V KOSTRIKOV, M KOURKOUMELIS, C KRAMER, PH KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIEB, E LIKO, D LILLETHUN, E LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MENICHETTI, E MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V OESTERBERG, K OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMIRNOV, N SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TORASSA, E TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VILANOVA, D VITALE, L VLASOV, E VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J TI A MEASUREMENT OF SIN2-THETA-W FROM THE CHARGE ASYMMETRY OF HADRONIC EVENTS AT THE Z0 PEAK SO PHYSICS LETTERS B LA English DT Article ID LUND MONTE-CARLO; E+E ANNIHILATION; JET FRAGMENTATION; Z-DECAYS; PHYSICS AB The weak mixing angle has been measured from the charge asymmetry of hadronic events with two different approaches using the DELPHI detector at LEP. Both methods are based on a momentum-weighted charge sum to determine the jet charge in both event hemispheres. In a data sample of 247 300 multihadronic Z0 decays a charge asymmetry of [Q(F)] - [Q(B)] = -0.0076 +/- 0.0012(stat.) +/- O.0005(exp. syst.) +/- 0.0014(frag.) and a raw forward-backward asymmetry of A(FB)raw = 0.0109 +/- 0.0020(stat.) +/- 0.0010(exp.syst.) +/- 0.0017(frag.) have been measured. This result corresponds to a value of sin2-theta(eff) = 0.2345 +/- 0.0030(exp.) +/- 0.0027(frag.) +/- sin2-theta(MSBAR) = 0.2341 +/- 0.0030(exp.) +/- 0.0027(frag.) and to sin2-theta(w) = 1 -m(w)2/m(z)2 = 0.2299 +/- 0.0030(exp.) +/- 0.0027(frag.) +/- 0.0028 (theor.). The experimental error is the quadratic sum of the statistical and the experimental systematic error and the theoretical error originates from a value of m(t) = 130 +/- 40 GeV/c2 and a range of m(H) from 45 GeV/c2 to 100 GeV/c2. C1 AUSTRIAN ACAD SCI,INST HOCHENERGIEPHYS,A-1050 VIENNA,AUSTRIA. CENS,DPHPE,F-91191 GIF SUR YVETTE,FRANCE. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV LUND,DEPT PHYS,S-22363 LUND,SWEDEN. JOINT INST NUCL RES,MOSCOW 101000,USSR. UNIV VALENCIA,CTR MIXTO,CSIC,INST FIS CORPUSCULAR,E-46100 BURJASSOT,SPAIN. UNIV VALENCIA,DEPT FIS ATOM MOLEC & NUCL,E-46100 BURJASSOT,SPAIN. UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY. CERN,CH-1211 GENEVA 23,SWITZERLAND. UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE. UNIV LYON 1,F-69622 VILLEURBANNE,FRANCE. UNIV KARLSRUHE,INST EXPTL KERNPHYS,W-7500 KARLSRUHE 1,GERMANY. UNIV STOCKHOLM,INST PHYS,S-11346 STOCKHOLM,SWEDEN. UNIV PARIS 11,ACCELERATEUR LINEAIRE LAB,F-91405 ORSAY,FRANCE. UNIV GRENOBLE 1,INST SCI NUCL,F-38026 GRENOBLE,FRANCE. UNIV TRIESTE,DIPARTIMENTO FIS,I-34127 TRIESTE,ITALY. IST NAZL FIS NUCL,I-34127 TRIESTE,ITALY. UNIV UDINE,IST FIS,I-33100 UDINE,ITALY. IST NAZL FIS NUCL,IST SUPER SANITA,I-00161 ROME,ITALY. UNIV OXFORD,NUCL PHYS LAB,OXFORD OX1 3RM,ENGLAND. UNIV MILANO,DIPARTIMENTO,I-20133 MILAN,ITALY. IST NAZL FIS NUCL,I-2033 MILAN,ITALY. UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,W-5600 WUPPERTAL 1,GERMANY. IST NAZL FIS NUCL,I-16146 GENOA,ITALY. UNIV GENOA,DIPARTIMENTO FIS,I-16146 GENOA,ITALY. COLL FRANCE,PHYS CORPUSCULAIRE LAB,F-75231 PARIS 05,FRANCE. PROTVINO HIGH ENERGY PHYS INST,PROTVINO 142284,USSR. UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM. UNIV ETAT MONS,FAC SCI,SERV PHYS PARTICULES ELEMENTAIRES,B-7000 MONS,BELGIUM. UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10125 TURIN,ITALY. IST NAZL FIS NUCL,I-10125 TURIN,ITALY. UNIV ROME 2,DIPARTIMENTO FIS,I-00173 ROME,ITALY. IST NAZL FIS NUCL,I-00173 ROME,ITALY. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,ENGLAND. UNIV UPPSALA,DEPT RADIAT SCI,S-75121 UPPSALA,SWEDEN. UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY. IST NAZL FIS NUCL,I-35131 PADUA,ITALY. UNIV HELSINKI,DEPT HIGH ENERGY PHYS,SF-00170 HELSINKI 17,FINLAND. UNIV OSLO,DEPT PHYS,N-1000 OSLO 3,NORWAY. UNIV SANTANDER,FAC CIENCIAS,E-39005 SANTANDER,SPAIN. UNIV BOLOGNA,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. UNIV COMPLUTENSE,E-28040 MADRID,SPAIN. NIELS BOHR INST,DK-2100 COPENHAGEN 0,DENMARK. UNIV WARSAW,PL-00681 WARSAW,POLAND. INST NUCL STUDIES,PL-00681 WARSAW,POLAND. NATL TECH UNIV ATHENS,DEPT PHYS,GR-15773 ATHENS,GREECE. INST NUCL STUDIES,HIGH ENERGY PHYS LAB,PL-30055 KRAKOW 30,POLAND. UNIV LANCASTER,SCH PHYS & MAT,LANCASTER LA1 4YB,ENGLAND. UNIV AIX MARSEILLE 2,F-13288 MARSEILLE 09,FRANCE. NATL INST NUCL PHYS & HIGH ENERGY PHYS,1009 DB AMSTERDAM,NETHERLANDS. UNIV PARIS 06 & 07,LPNHE,F-75230 PARIS 05,FRANCE. NCSR DEMOKRITOS,INST NUCL PHYS,GR-15310 ATHENS,GREECE. CTR RECH NUCL,DELPHI GRP,DIV HAUTES ENERGIES,F-67037 STRASBOURG,FRANCE. LEPSI,F-67037 STRASBOURG,FRANCE. UNIV LIBRE BRUXELLES VRIJE UNIV BRUSSEL,IIHE,B-1050 BRUSSELS,BELGIUM. RP ABREU, P (reprint author), LIP,AV ELIAS GARCIA 14 LE,P-1000 LISBON,PORTUGAL. RI Hallgren, Allan/A-8963-2013; Botner, Olga/A-9110-2013; Zalewski, Piotr/H-7335-2013; Marti-Garcia, Salvador/F-3085-2011; de Groot, Nicolo/A-2675-2009; Katsanevas, Stavros/A-4297-2011; Ruiz, Alberto/E-4473-2011; branchini, paolo/A-4857-2011; Shellard, Ronald/G-4825-2012; Torassa, Ezio/I-1788-2012; Giacomelli, Paolo/B-8076-2009; Fruhwirth, Rudolf/H-2529-2012; Dracos, Marcos/K-2335-2012; Rovelli, Tiziano/K-4432-2015; Lozano-Bahilo, Julio/F-4881-2016; Olshevskiy, Alexander/I-1580-2016; Paganoni, Marco/A-4235-2016; Contreras Gonzalez, Jose Luis/K-7255-2014; Hernandez-Rey, Juan Jose/N-5955-2014; Abreu, Pedro/L-2220-2014; Zaitsev, Alexandre/B-8989-2017; Vaz, Pedro/K-2464-2013; Monge, Maria Roberta/G-9127-2012; Ridky, Jan/H-6184-2014; Zukanovich Funchal, Renata/C-5829-2013; Pimenta, Mario/M-1741-2013; Gomez Cadenas, Juan Jose/L-2003-2014; Ragazzi, Stefano/D-2463-2009; Roditi, Itzhak/O-7448-2014; Zuniga, Juan/P-4385-2014; Michelotto, Michele/A-9571-2013; Matorras, Francisco/I-4983-2015; Ferrer, Antonio/H-2942-2015 OI Ruiz, Alberto/0000-0002-3639-0368; Shellard, Ronald/0000-0002-2983-1815; Dracos, Marcos/0000-0003-0514-193X; Sannino, Mario/0000-0001-7700-8383; De Lotto, Barbara/0000-0003-3624-4480; Rovelli, Tiziano/0000-0002-9746-4842; Lozano-Bahilo, Julio/0000-0003-0613-140X; Olshevskiy, Alexander/0000-0002-8902-1793; Paganoni, Marco/0000-0003-2461-275X; Contreras Gonzalez, Jose Luis/0000-0001-7282-2394; Hernandez-Rey, Juan Jose/0000-0002-1527-7200; Abreu, Pedro/0000-0002-9973-7314; Zaitsev, Alexandre/0000-0002-4961-8368; Matteuzzi, Clara/0000-0002-4047-4521; DE MIN, ALBERTO/0000-0002-8130-9389; Demaria, Natale/0000-0003-0743-9465; Vaz, Pedro/0000-0002-7186-2359; Monge, Maria Roberta/0000-0003-1633-3195; Ridky, Jan/0000-0001-6697-1393; Zukanovich Funchal, Renata/0000-0001-6749-0022; Pimenta, Mario/0000-0002-2590-0908; Gomez Cadenas, Juan Jose/0000-0002-8224-7714; Ragazzi, Stefano/0000-0001-8219-2074; Roditi, Itzhak/0000-0003-2363-5626; Zuniga, Juan/0000-0002-1041-6451; Michelotto, Michele/0000-0001-6644-987X; Matorras, Francisco/0000-0003-4295-5668; Ferrer, Antonio/0000-0003-0532-711X NR 24 TC 21 Z9 21 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD MAR 5 PY 1992 VL 277 IS 3 BP 371 EP 382 DI 10.1016/0370-2693(92)90760-2 PG 12 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA HJ859 UT WOS:A1992HJ85900023 ER PT J AU MOUNTFORD, HS SPREER, LO OTVOS, JW CALVIN, M BREWER, KJ RICHTER, M SCOTT, B AF MOUNTFORD, HS SPREER, LO OTVOS, JW CALVIN, M BREWER, KJ RICHTER, M SCOTT, B TI STRUCTURE AND PROPERTIES OF A BIMETALLIC COMPLEX WITH A CONJUGATED BRIDGE BETWEEN IRON ATOMS IN 2 MACROCYCLES SO INORGANIC CHEMISTRY LA English DT Note ID METAL AB The structure of a unique dinuclear bis-macrocyclic iron complex with a conjugated link between the low-spin iron(II) ions has been determined. This compound has unusually short iron-imine nitrogen bond lengths; it also has an intense near-infrared electronic transition (lambda = 874 nm, epsilon = 14 000 M-1 cm-1) that is assigned to an MLCT. Each iron has two axial CH3CN ligands. C1 UNIV PACIFIC,DEPT CHEM,STOCKTON,CA 95211. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. WASHINGTON STATE UNIV,DEPT CHEM,PULLMAN,WA 99164. NR 10 TC 21 Z9 21 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD MAR 4 PY 1992 VL 31 IS 5 BP 717 EP & DI 10.1021/ic00031a001 PG 0 WC Chemistry, Inorganic & Nuclear SC Chemistry GA HG901 UT WOS:A1992HG90100001 ER PT J AU HUSTON, P ESPENSON, JH BAKAC, A AF HUSTON, P ESPENSON, JH BAKAC, A TI KINETICS OF FORMATION AND REACTIONS OF THIYL RADICALS IN AQUEOUS-SOLUTION SO INORGANIC CHEMISTRY LA English DT Note ID ELECTRON-TRANSFER-REACTIONS; PULSE-RADIOLYSIS; AQUATION KINETICS; OXIDATION; ION AB Very few kinetic data are available that describe reactions of sulfur-centered radicals, despite their importance in biological systems. Thiyl radicals may be produced by generating carbon-centered radicals using visible laser flash photolysis and taking advantage of the repair reaction. Thiyl radicals are difficult to detect directly and require the use of a kinetic probe such as ABTS2- or TMPD. Kinetic studies of these reactions as well as reactions of ethanethiyl radicals with hexaaqua complexes of chromium(II), vanadium(II), and iron(II) are described. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 28 TC 20 Z9 20 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD MAR 4 PY 1992 VL 31 IS 5 BP 720 EP & DI 10.1021/ic00031a003 PG 0 WC Chemistry, Inorganic & Nuclear SC Chemistry GA HG901 UT WOS:A1992HG90100003 ER PT J AU KLINGLER, RJ RATHKE, JW AF KLINGLER, RJ RATHKE, JW TI THERMODYNAMICS FOR THE HYDROGENATION OF DIMANGANESE DECACARBONYL SO INORGANIC CHEMISTRY LA English DT Article ID TRANSITION-METAL HYDRIDES; FREE-RADICAL MECHANISM; HYDROFORMYLATION REACTION; THERMAL-DECOMPOSITION; DICOBALT OCTACARBONYL; BOND STRENGTHS; CATALYSIS; CHEMISTRY; COMPLEXES; CO2(CO)8 AB The equilibrium constant for the hydrogenation of Mn2(CO)10 in supercritical carbon dioxide has been measured under carbon monoxide and hydrogen at total system pressures of 142-300 atm by in situ Mn-55 and H-1 NMR spectroscopy over the temperature range 165-220-degrees-C. The hydrogenation of Mn2(CO)10 is efficiently promoted by the addition of Co2(CO)8 to the system. The rate of HMn(CO)5 production at 100-degrees-C is increased by 2 orders of magnitude with the addition of 1 equiv of Co2(CO)8. The magnitude of this promotional effect has extended the range of temperatures down to 80-degrees-C over which it is feasible to determine the equilibrium constant for Mn2(CO)10 hydrogenation. van't Hoff plots for the hydrogenation of Mn2(CO)10 in the presence and absence of the Co2(CO)8 promoter were found to yield standard enthalpy and entropy changes that agree to within the statistical error limit of the equilibrium constant measurements. The resultant analysis for the combined data set yields DELTA-H-degrees = 8.7 +/- 0.3 kcal/mol and DELTA-S-degrees = 8.5 +/- 0.8 cal/(K.mol) for the hydrogenation of Mn2(CO)10. The heterobimetallic dimer Mn(CO)5-Co(CO)4 is observed as an additional reaction product in both the Mn-55 and the Co-59 NMR spectra, within the mixed-metal system. The thermodynamics for the redistribution reaction yielding 2 equiv of MnCo(CO)9 from the homonuclear dimers, Mn2(CO)10 and Co2(CO)8, was found to be nearly thermal neutral exhibiting DELTA-H-degrees = 0.8 +/- 0.3 kcal/mol and DELTA-S-degrees = 0.7 +/- 0.8 cal/(K.mol), respectively. RP KLINGLER, RJ (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 53 TC 17 Z9 17 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD MAR 4 PY 1992 VL 31 IS 5 BP 804 EP 808 DI 10.1021/ic00031a021 PG 5 WC Chemistry, Inorganic & Nuclear SC Chemistry GA HG901 UT WOS:A1992HG90100021 ER PT J AU WOO, LK MAURYA, MR JACOBSON, RA YANG, SM RINGROSE, SL AF WOO, LK MAURYA, MR JACOBSON, RA YANG, SM RINGROSE, SL TI MONONUCLEAR AND DINUCLEAR COMPLEXES OF A NEW BINUCLEATING PORPHYRIN, ALPHA,ALPHA-5,15-BIS(ORTHO-(NICOTINOYLAMINO)PHENYL)-2,8,12,18-TETRAETHYL -3,7,13,17-TETRAMETHYLPORPHYRIN - CRYSTAL-STRUCTURES OF A MONONUCLEAR NICKEL(II) COMPLEX AND A BINUCLEAR CU-PT COMPLEX SO INORGANIC CHEMISTRY LA English DT Article ID MOLECULAR-STRUCTURE; LIGAND; MODELS AB The synthesis and characterization of a new binucleating porphyrin ligand, alpha,alpha-5,15-bis(o-(nicotinoylamido)phenyl)-2,8,12,18-tetraethyl-3,7,13,17-tetramethylporphyrin, [H-2(DPE)]-(py)2 is reported. Treatment of [H-2(DPE)]-(py)2 with methanol solutions of Ni(II) or Cu(II) leads to the formation of mononuclear metal complexes, [M(DPE)]-(py)2, in which the metal has inserted into the porphyrin core, leaving the pyridine binding site free. Addition of a second metal to form a binuclear complex, [M-(DPE)]-(py)2M'Cl2, can be accomplished using the reagent M'(DMSO)2Cl2, M' = Pd, Pt, and Zn. [Ni(DPE)]-(py)2 and [Cu(DPE)]-(py)2PtCl2 have been characterized by single-crystal X-ray analysis. Crystal data for [Ni(DPE)]-(py)2: NiO2N8-C56H52.2CHCl3, triclinic, P1BAR, a = 14.306 (4) angstrom, b = 14.719 (5) angstrom, c = 14.296 (5) angstrom, alpha = 94.86 (3)-degrees, beta = 96.38 (3)-degrees, gamma = 63.45 (2)-degrees, Z = 2, R = 0.049, and R(w) = 0.064. Crystal data for [Cu(DPE)]-(py)2PtCl2: CuPtO2N8C56H52, triclinic, P1BAR, a = 19.333 (1) angstrom, b = 23.74 (1) angstrom, c = 12.984 (5) angstrom, alpha = 103.28 (4)-degrees, beta = 108.29 (3)-degrees, gamma = 76.47 (3)-degrees, Z = 4, R = 0.073, and R(w) = 0.085. Pt-Pt distances between the two molecules in the asymmetric unit are 3.766 (3) angstrom. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP WOO, LK (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 30 TC 15 Z9 15 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD MAR 4 PY 1992 VL 31 IS 5 BP 913 EP 919 DI 10.1021/ic00031a039 PG 7 WC Chemistry, Inorganic & Nuclear SC Chemistry GA HG901 UT WOS:A1992HG90100039 ER PT J AU FUSELIER, SA THOMSEN, MF AF FUSELIER, SA THOMSEN, MF TI HE-2+ IN FIELD-ALIGNED BEAMS - ISEE RESULTS SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID EARTHS BOW SHOCK; ION-BEAMS; ALPHA-PARTICLES; SOLAR-WIND; UPSTREAM; FORESHOCK; EVENTS; ORIGIN AB He2+ concentrations are determined for 14 field-aligned proton beam events observed in the ion foreshock region upstream from the Earth's bow shock by the ISEE spacecraft. For all 14 events, most under normal solar wind conditions, the He2+ concentrations were a factor of 10 or more below the H+ concentrations in the field-aligned beams when normalized by the solar wind He2+ to H+ density ratio. These results indicate that field-aligned beams do not provide the principal He2+ seed population for ion acceleration in the ion foreshock region. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. RP FUSELIER, SA (reprint author), LOCKHEED PALO ALTO RES LABS,D91-20 B255,3251 HANOVER ST,PALO ALTO,CA 94304, USA. NR 19 TC 16 Z9 16 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD MAR 3 PY 1992 VL 19 IS 5 BP 437 EP 440 DI 10.1029/92GL00375 PG 4 WC Geosciences, Multidisciplinary SC Geology GA HH091 UT WOS:A1992HH09100003 ER PT J AU MAGENHEIM, AJ BAYHURST, G ALT, JC GIESKES, JM AF MAGENHEIM, AJ BAYHURST, G ALT, JC GIESKES, JM TI ODP LEG-137, BOREHOLE FLUID CHEMISTRY IN HOLE-504B SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID CRUSTAL GEOTHERMAL MEASUREMENTS; WATERS; SEAWATER; BASEMENT AB Borehole fluid samples collected from Site 504B, during ODP Leg 137, provide the best opportunity to date to study water-rock interaction within the ocean crust. Chemical composition of the borehole fluids reveal the results of seawater-basalt interaction at elevated temperatures. The borehole fluids can be described as a two component mixture, consisting of a reacted fluid component and seawater which has convectively mixed into the borehole from the seafloor. Progressive trends in fluid chemistry with time suggest that the fluid-rock reactions have changed as the borehole has been drilled deeper into the hotter formation Based on data from this study and comparisons to fluid studies from past visits to Site 504B, indications are that these reactions are occurring within the borehole environment. C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. SCRIPPS INST OCEANOG,DIV MARINE RES,LA JOLLA,CA 92037. RP MAGENHEIM, AJ (reprint author), UNIV MICHIGAN,DEPT GEOL SCI,ANN ARBOR,MI 48109, USA. NR 15 TC 3 Z9 3 U1 0 U2 2 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD MAR 3 PY 1992 VL 19 IS 5 BP 521 EP 524 DI 10.1029/91GL02948 PG 4 WC Geosciences, Multidisciplinary SC Geology GA HH091 UT WOS:A1992HH09100024 ER PT J AU ADE, H KO, CH ANDERSON, E AF ADE, H KO, CH ANDERSON, E TI ASTIGMATISM CORRECTION IN X-RAY-SCANNING PHOTOEMISSION MICROSCOPE WITH USE OF ELLIPTIC ZONE PLATE SO APPLIED PHYSICS LETTERS LA English DT Article AB We report the impact of an elliptical, high resolution zone plate on the performance of an initially astigmatic soft x-ray scanning photoemission microscope. A zone plate with carefully calibrated eccentricity has been used to eliminate astigmatism arising from transport optics, and an improvement of about a factor of 3 in spatial resolution was achieved. The resolution is still dominated by the source size and chromatic aberrations rather than by diffraction and coma, and a further gain of about a factor of 2 in resolution is possible. Sub 100 nm photoemission microscopy with primary photoelectrons is now within reach. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR XRAY OPT,BERKELEY,CA 94720. RP ADE, H (reprint author), SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794, USA. RI Ade, Harald/E-7471-2011 NR 16 TC 15 Z9 15 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 2 PY 1992 VL 60 IS 9 BP 1040 EP 1042 DI 10.1063/1.106437 PG 3 WC Physics, Applied SC Physics GA HF856 UT WOS:A1992HF85600002 ER PT J AU MARTENS, JS ZIPPERIAN, TE VAWTER, GA GINLEY, DS HIETALA, VM TIGGES, CP AF MARTENS, JS ZIPPERIAN, TE VAWTER, GA GINLEY, DS HIETALA, VM TIGGES, CP TI TL-CA-BA-CU-O STEP-EDGE JOSEPHSON-JUNCTIONS SO APPLIED PHYSICS LETTERS LA English DT Article ID CRITICAL CURRENTS AB There has been considerable progress in the development of nonhysteretic Josephson junction microelectronic technologies for YBaCuO. Such a technology for Tl-Ca-Ba-Cu-O junctions would be interesting because of the higher operating temperatures and the very different grain boundary structures in the different cuprate superconductors. We have successfully made step-edge junctions with TlCaBaCuO grown on ion-milled LaAlO3. Nonhysteretic grain boundary-based junctions have been demonstrated with critical current-normal state resistance products exceeding 5 mV at 77 K, critical current densities ranging from 500 to 25 000 A/cm2, and critical current versus field profiles suggesting very uniform junctions. Yield has exceeded 70% on over 250 junctions tested and operation has been demonstrated to 100 K. RP MARTENS, JS (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 9 TC 10 Z9 10 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 2 PY 1992 VL 60 IS 9 BP 1141 EP 1143 DI 10.1063/1.107458 PG 3 WC Physics, Applied SC Physics GA HF856 UT WOS:A1992HF85600036 ER PT J AU CHENG, SZD CHEN, JH BARLEY, JS ZHANG, AQ HABENSCHUSS, A ZSCHACK, PR AF CHENG, SZD CHEN, JH BARLEY, JS ZHANG, AQ HABENSCHUSS, A ZSCHACK, PR TI ISOTHERMAL THICKENING AND THINNING PROCESSES IN LOW-MOLECULAR-WEIGHT POLY(ETHYLENE OXIDE) FRACTIONS CRYSTALLIZED FROM THE MELT .3. MOLECULAR-WEIGHT DEPENDENCE SO MACROMOLECULES LA English DT Article ID LONGITUDINAL ACOUSTIC MODE; SELF-SEEDED POLYMERS; GROWTH-RATE; SINGLE-CRYSTALS; POLYETHYLENE FRACTIONS; LONG PARAFFINS; MORPHOLOGY; REPTATION; FUSION; ONSET AB The existence of nonintegral folding chain (NIF) crystals in a series of poly(ethylene oxide) (PEO) fractions with molecular weight ranging between 3000 and 23 000 has been observed through time-resolved synchrotron small-angle X-ray scattering (SAXS), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM) experiments. It has been found that with increasing molecular weight the isothermal thickening and/or thinning processes which lead to formation of the final integral folding chain (IF) crystals are increasingly hampered. At sufficiently high molecular weights, NIF crystals may be permanently retained. The thermodynamic driving force for these processes is discussed. An explanation of the NIF to IF transformation consists of both a thermodynamic reason (Gibbs free energy change) and a kinetic effect (chain diffusional motion and chain fold number). Of additional interest, the fold length of initial NIF crystals increases with crystallization temperature (or decreasing supercooling) for each fraction as commonly observed in polymer lamellar crystals with a relationship of l = C2 + C1/DELTA-T. However, the slope C1 increases with molecular weight instead of remaining constant as theoretically predicted. This may be caused by a change of the fold surface free energy due to loose folds, chain ends, and hydrogen bonding in the NIF crystals. C1 UNIV AKRON,COLL POLYMER SCI & POLYMER ENGN,DEPT POLYMER SCI,AKRON,OH 44325. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP CHENG, SZD (reprint author), UNIV AKRON,COLL POLYMER SCI & POLYMER ENGN,INST POLYMER SCI,AKRON,OH 44325, USA. NR 33 TC 90 Z9 91 U1 2 U2 33 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD MAR 2 PY 1992 VL 25 IS 5 BP 1453 EP 1460 DI 10.1021/ma00031a015 PG 8 WC Polymer Science SC Polymer Science GA HG439 UT WOS:A1992HG43900015 ER PT J AU BEENE, JR BERTRAND, FE AF BEENE, JR BERTRAND, FE TI GIANT-RESONANCES AND INTERMEDIATE ENERGY HEAVY-IONS - ELECTROMAGNETIC DECAY EXPERIMENTS SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON NUCLEUS-NUCLEUS COLLISIONS CY JUN 10-15, 1991 CL RIKEN INST PHYS & CHEM RES, KANAZAWA, JAPAN SP INT UNION PURE & APPL PHYS, SCI COUNCIL JAPAN, PHYS SOC JAPAN, KANAZAWA UNIV, NATL LAB HIGH ENERGY PHYS, JAPAN ATOM ENERGY RES INST, UNIV TOKYO, INST NUCL STUDY, KYOTO UNIV, YUKAWA INST THEORET PHYS, OSAKA UNIV, RES CTR NUCL PHYS HO RIKEN INST PHYS & CHEM RES ID QUADRUPOLE-RESONANCE; DIPOLE RESONANCE; COULOMB-EXCITATION; MACROSCOPIC MODELS; COLLECTIVE STATES; NEUTRON DECAY; CROSS-SECTION; PHOTON DECAY; PB-208; COMPOUND AB We briefly explore how large cross sections for excitation of both isoscalar and isovector giant multipole resonances which can be obtained using intermediate energy heavy-ion reactions can be utilized in photon-decay coincidence experiments to provide new information on subjects ranging from basic nuclear structure properties to resonance damping and pre-compound decay. We also discuss experiments in which photon-decay techniques are used as a tag to isolate and identify very weakly excited modes, enabling us to explore such diverse subjects as hadronic excitation of the giant dipole resonance, the distribution of isovector quadrupole strength in Pb-208, and the excitation of two-phonon giant resonance strength. RP BEENE, JR (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 29 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD MAR 2 PY 1992 VL 538 BP C553 EP C563 PG 11 WC Physics, Nuclear SC Physics GA HM169 UT WOS:A1992HM16900052 ER PT J AU GYULASSY, M PLUMER, M THOMA, M WANG, XN AF GYULASSY, M PLUMER, M THOMA, M WANG, XN TI HIGH PT PROBES OF NUCLEAR COLLISIONS SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON NUCLEUS-NUCLEUS COLLISIONS CY JUN 10-15, 1991 CL RIKEN INST PHYS & CHEM RES, KANAZAWA, JAPAN SP INT UNION PURE & APPL PHYS, SCI COUNCIL JAPAN, PHYS SOC JAPAN, KANAZAWA UNIV, NATL LAB HIGH ENERGY PHYS, JAPAN ATOM ENERGY RES INST, UNIV TOKYO, INST NUCL STUDY, KYOTO UNIV, YUKAWA INST THEORET PHYS, OSAKA UNIV, RES CTR NUCL PHYS HO RIKEN INST PHYS & CHEM RES ID LUND MONTE-CARLO; QUARK-GLUON PLASMAS; JET FRAGMENTATION; CROSS-SECTIONS; SMALL VALUES; E+E-PHYSICS; QCD; ENERGY; SCATTERING; MODEL AB Jet quenching in high energy nuclear collisions is shown to provide new information on the energy loss mechanisms in dense matter near the quark-gluon plasma transition. In addition it is shown that A dependence of the inclusive pT spectra in p + A provides novel constraints on gluon shadowing in nuclei. RP GYULASSY, M (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,MAILSTOP 70A-3307,BERKELEY,CA 94720, USA. NR 48 TC 67 Z9 67 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD MAR 2 PY 1992 VL 538 BP C37 EP C49 PG 13 WC Physics, Nuclear SC Physics GA HM169 UT WOS:A1992HM16900004 ER PT J AU IKEZOE, H SHIKAZONO, N NAGAME, Y OHTSUKI, T SUGIYAMA, Y TOMITA, Y IDENO, K KANNO, I KIM, HJ QI, BJ IWAMOTO, A AF IKEZOE, H SHIKAZONO, N NAGAME, Y OHTSUKI, T SUGIYAMA, Y TOMITA, Y IDENO, K KANNO, I KIM, HJ QI, BJ IWAMOTO, A TI CHARGED-PARTICLE EMISSIONS IN FISSION PROCESS SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON NUCLEUS-NUCLEUS COLLISIONS CY JUN 10-15, 1991 CL RIKEN INST PHYS & CHEM RES, KANAZAWA, JAPAN SP INT UNION PURE & APPL PHYS, SCI COUNCIL JAPAN, PHYS SOC JAPAN, KANAZAWA UNIV, NATL LAB HIGH ENERGY PHYS, JAPAN ATOM ENERGY RES INST, UNIV TOKYO, INST NUCL STUDY, KYOTO UNIV, YUKAWA INST THEORET PHYS, OSAKA UNIV, RES CTR NUCL PHYS HO RIKEN INST PHYS & CHEM RES ID FUSION-FISSION; NEUTRON EMISSION; TERNARY FISSION; HE-4; NUCLEI; ENERGY; SYSTEMATICS; MECHANISMS; SCISSION; BARRIERS AB Pre- and post-scission multiplicities of proton and alpha-particle have been measured in the reactions of F-19 + Ta-181, Au-197, Pb-208 and Si-28 + Au-197, Pb-208 and O-16 + Au-197. Pre-scission data show no systematic deviation from statistical model calculations if measured emission barriers for charged particles are taken into account in the transmission coefficient calculations. This suggests that the transient time during which fission widths reach a stationary value at saddle point is less than about 10(-20) sec. Post-scission multiplicities of proton and alpha-particle show steep increases with compound nucleus excitation energies. C1 INST ATOM ENERGY,BEIJING 102413,PEOPLES R CHINA. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP IKEZOE, H (reprint author), JAPAN ATOM ENERGY RES INST,DEPT PHYS,TOKAI,IBARAKI 31911,JAPAN. NR 26 TC 8 Z9 8 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD MAR 2 PY 1992 VL 538 BP C299 EP C305 PG 7 WC Physics, Nuclear SC Physics GA HM169 UT WOS:A1992HM16900028 ER PT J AU RANDRUP, J BURGIO, GF CHOMAZ, P AF RANDRUP, J BURGIO, GF CHOMAZ, P TI DYNAMIC FLUCTUATIONS AND NUCLEAR MULTIFRAGMENTATION SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON NUCLEUS-NUCLEUS COLLISIONS CY JUN 10-15, 1991 CL RIKEN INST PHYS & CHEM RES, KANAZAWA, JAPAN SP INT UNION PURE & APPL PHYS, SCI COUNCIL JAPAN, PHYS SOC JAPAN, KANAZAWA UNIV, NATL LAB HIGH ENERGY PHYS, JAPAN ATOM ENERGY RES INST, UNIV TOKYO, INST NUCL STUDY, KYOTO UNIV, YUKAWA INST THEORET PHYS, OSAKA UNIV, RES CTR NUCL PHYS HO RIKEN INST PHYS & CHEM RES ID HEAVY-ION COLLISIONS AB Energetic nucleus-nucleus collisions display spontaneous symmetry breaking, such as multifragmentation, and we report on current efforts to extend BUU-type dynamical models to incorporate the fluctuations arising from the stochastic nature of the two-body collision integral, in the presence of the instabilities caused by the effective one-body field. RP RANDRUP, J (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720, USA. NR 12 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD MAR 2 PY 1992 VL 538 BP C393 EP C402 PG 10 WC Physics, Nuclear SC Physics GA HM169 UT WOS:A1992HM16900037 ER PT J AU SCHROEDER, LS AF SCHROEDER, LS TI PROBING NUCLEAR-MATTER WITH DIELECTRONS RESULTS FROM THE BEVALAC SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON NUCLEUS-NUCLEUS COLLISIONS CY JUN 10-15, 1991 CL RIKEN INST PHYS & CHEM RES, KANAZAWA, JAPAN SP INT UNION PURE & APPL PHYS, SCI COUNCIL JAPAN, PHYS SOC JAPAN, KANAZAWA UNIV, NATL LAB HIGH ENERGY PHYS, JAPAN ATOM ENERGY RES INST, UNIV TOKYO, INST NUCL STUDY, KYOTO UNIV, YUKAWA INST THEORET PHYS, OSAKA UNIV, RES CTR NUCL PHYS HO RIKEN INST PHYS & CHEM RES ID P-BE COLLISIONS AB The use of dielectrons to probe extreme conditions in nuclear matter is discussed. Earlier results from p-A and A-A studies by the Dilepton Spectrometer (DLS) collaboration at the Bevalac are briefly reviewed. Preliminary results on the yield of dielectrons in p-p and p-d interactions at 1.0 and 4.9 GeV are presented. Future directions of the DLS program, with the expectation of higher statistics, is outlined. RP SCHROEDER, LS (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720, USA. NR 14 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD MAR 2 PY 1992 VL 538 BP C177 EP C185 PG 9 WC Physics, Nuclear SC Physics GA HM169 UT WOS:A1992HM16900017 ER PT J AU YOUNG, GR AF YOUNG, GR TI PHYSICS AND EXPERIMENTS AT RHIC SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON NUCLEUS-NUCLEUS COLLISIONS CY JUN 10-15, 1991 CL RIKEN INST PHYS & CHEM RES, KANAZAWA, JAPAN SP INT UNION PURE & APPL PHYS, SCI COUNCIL JAPAN, PHYS SOC JAPAN, KANAZAWA UNIV, NATL LAB HIGH ENERGY PHYS, JAPAN ATOM ENERGY RES INST, UNIV TOKYO, INST NUCL STUDY, KYOTO UNIV, YUKAWA INST THEORET PHYS, OSAKA UNIV, RES CTR NUCL PHYS HO RIKEN INST PHYS & CHEM RES ID QUARK-GLUON PLASMA; PION INTERFEROMETRY; PHASE-TRANSITION; SIGNAL RP YOUNG, GR (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 12 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD MAR 2 PY 1992 VL 538 BP C649 EP C658 PG 10 WC Physics, Nuclear SC Physics GA HM169 UT WOS:A1992HM16900061 ER PT J AU MENG, RB OLNESS, FI SOPER, DE AF MENG, RB OLNESS, FI SOPER, DE TI SEMIINCLUSIVE DEEPLY INELASTIC-SCATTERING AT ELECTRON PROTON COLLIDERS SO NUCLEAR PHYSICS B LA English DT Article ID LEPTON-PAIR PRODUCTION; HIGH-PT W; QUANTUM CHROMODYNAMICS; TRANSVERSE-MOMENTUM; ENERGY CORRELATIONS; POSITRON ANNIHILATION; HADRON COLLISIONS; BOSON PRODUCTION; QCD PREDICTIONS; CROSS-SECTIONS AB Measurement of the distribution of hadronic energy in the final state in deeply inelastic electron scattering at HERA can provide a good test of our understanding of perturbative QCD. For this purpose, we define an energy distribution function, which can be computed in terms of parton distribution functions for the incoming hadron without involving parton decay functions for the outgoing partons. We expand the energy distribution in terms of functions of certain angles times scalar functions that describe the hadronic structure. Finally, we compute these hadronic structure functions (away from the direction corresponding to zero transverse momentum) at order alpha(s). The gluon-initiated contribution can yield as much as 50% of the total; therefore, this process can play a significant role in determining the gluon distribution. C1 CERN,DIV THEORET,CH-1211 GENEVA 23,SWITZERLAND. UNIV OREGON,INST THEORET SCI,EUGENE,OR 97403. RP MENG, RB (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. OI Meng, Ruibin/0000-0002-4846-4619 NR 41 TC 44 Z9 44 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 MAR 2 PY 1992 VL 371 IS 1-2 BP 79 EP 110 DI 10.1016/0550-3213(92)90230-9 PG 32 WC Physics, Particles & Fields SC Physics GA HK314 UT WOS:A1992HK31400004 ER PT J AU BJORKEN, JD DUNIETZ, I TARON, J AF BJORKEN, JD DUNIETZ, I TARON, J TI INCLUSIVE SEMILEPTONIC DECAYS OF BOTTOM BARYONS AND MESONS INTO CHARMED AND UNCHARMED FINAL-STATES - THE CASE OF INFINITELY HEAVY B-QUARKS AND C-QUARKS SO NUCLEAR PHYSICS B LA English DT Article ID FORM-FACTORS AB Spectator model decay rates are predicted for inclusive semileptonic decays of the LAMBDA(b) baryon and the B meson, in the limit of a very heavy b quark, in lowest order Of perturbative QCD. For charmless final states the result is only achieved in a short distance limit, sharing similarities with the deep inelastic scattering situation, and allowing for a parton model interpretation. In all cases these results are expressed in terms of sum rules derived with the help of equal-time, local current algebra. C1 CERN,DIV THEORET,CH-1211 GENEVA 23,SWITZERLAND. RP BJORKEN, JD (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 12 TC 65 Z9 65 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD MAR 2 PY 1992 VL 371 IS 1-2 BP 111 EP 140 DI 10.1016/0550-3213(92)90231-Y PG 30 WC Physics, Particles & Fields SC Physics GA HK314 UT WOS:A1992HK31400005 ER PT J AU WUOSMAA, AH BETTS, RR BACK, BB FREER, M GLAGOLA, BG HAPP, T HENDERSON, DJ WILT, P BEARDEN, IG AF WUOSMAA, AH BETTS, RR BACK, BB FREER, M GLAGOLA, BG HAPP, T HENDERSON, DJ WILT, P BEARDEN, IG TI EVIDENCE FOR ALPHA-PARTICLE CHAIN CONFIGURATIONS IN MG-24 SO PHYSICAL REVIEW LETTERS LA English DT Article ID CLUSTER MODEL; POINT SYMMETRY; RESONANCES; SCATTERING; STATE; O-16; S-32; BAND AB We have observed a strong peak in the excitation function for the inelastic scattering reaction C-12(C-12, C-12(0(2)+))C-12(0(2)+) at an energy of E(c.m.) = 32.5 MeV. A recoil coincidence arrangement between two double-sided silicon strip detectors was used to detect the alpha-particles from the decaying C-12 nuclei, and the reconstructed reaction kinematics were used to calculate the two-body scattering Q value. This excitation-function structure may be interpreted as arising from very highly deformed alpha-particle chain configurations in the nucleus Mg-24. C1 PURDUE UNIV,DEPT PHYS,W LAFAYETTE,IN 47907. RP WUOSMAA, AH (reprint author), ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439, USA. RI Freer, Martin/F-9379-2013; Bearden, Ian/M-4504-2014 OI Bearden, Ian/0000-0003-2784-3094 NR 22 TC 114 Z9 114 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 MAR 2 PY 1992 VL 68 IS 9 BP 1295 EP 1297 DI 10.1103/PhysRevLett.68.1295 PG 3 WC Physics, Multidisciplinary SC Physics GA HF890 UT WOS:A1992HF89000012 ER PT J AU INDELICATO, P BIRKETT, BB BRIAND, JP CHARLES, P DIETRICH, DD MARRUS, R SIMIONOVICI, A AF INDELICATO, P BIRKETT, BB BRIAND, JP CHARLES, P DIETRICH, DD MARRUS, R SIMIONOVICI, A TI HYPERFINE QUENCHING AND PRECISION-MEASUREMENT OF THE 23P0-23P1 FINE-STRUCTURE SPLITTING IN HELIUM-LIKE GADOLINIUM (GD62+) SO PHYSICAL REVIEW LETTERS LA English DT Article ID 2-ELECTRON IONS; ISOELECTRONIC SEQUENCE; STATE; SPECTROSCOPY; ENERGIES; ELECTRON; LIFETIME; ATOMS; TESTS AB The hyperfine-quenched transition 2P-3(0)-1S-1(0) has been observed in heliumlike gadolinium (Gd62+) in the two isotopes Gd-155 and Gd-157. The lifetime for the transition (tau-0) has been measured for each isotope and found to be tau-0(155) = 13.43(27) x 10(-12) sec and tau-0(157) = 7.65(55) x 10(-12) sec. From the measured lifetimes a value is inferred for the absolute value of the 2P-3(0)-2P-3(1) fine-structuring splitting \DELTA-E0-1\ in Gd62+ with the result \DELTA-E0-1\ = 18.57(19) eV, where the error represents 1 standard deviation. This result is compared with calculations based on the multiconfiguration Dirac-Fock method and on the unified method. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. CEN,LAB GRENOBLOIS RECH IONS PLASMAS & PHYS ATOM,F-38041 GRENOBLE,FRANCE. RP INDELICATO, P (reprint author), UNIV PARIS 06,INST RADIUM,PHYS ATOM & NUCL LAB,T12,BOITE 93,F-75252 PARIS 05,FRANCE. RI Indelicato, Paul/D-7636-2011 OI Indelicato, Paul/0000-0003-4668-8958 NR 26 TC 44 Z9 44 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 MAR 2 PY 1992 VL 68 IS 9 BP 1307 EP 1310 DI 10.1103/PhysRevLett.68.1307 PG 4 WC Physics, Multidisciplinary SC Physics GA HF890 UT WOS:A1992HF89000015 ER PT J AU QIU, ZQ PEARSON, J BERGER, A BADER, SD AF QIU, ZQ PEARSON, J BERGER, A BADER, SD TI SHORT-PERIOD OSCILLATIONS IN THE INTERLAYER MAGNETIC COUPLING OF WEDGED FE(100)/MO(100)/FE(100) GROWN ON MO(100) BY MOLECULAR-BEAM EPITAXY SO PHYSICAL REVIEW LETTERS LA English DT Article ID MAGNETORESISTANCE AB (100)-oriented Fe/Mo/Fe sandwiches were grown by molecular-beam epitaxy onto a Mo(100) crystal and were investigated in situ by means of the magneto-optic Kerr effect. The Fe layers are each 14 monolayers (ML) thick, and the intervening Mo is wedge shaped to facilitate the study of the magnetic coupling between the two Fe films as a function of Mo thickness in the range 1-18 ML. Five oscillations between antiferromagnetic and ferromagnetic coupling were observed with a periodicity of approximately 3 ML of Mo. C1 FORSCHUNGSZENTRUM JULICH, INST GRENZFLACHENFORSCH & VAKUUMPHYS, W-5170 JULICH 1, GERMANY. RP QIU, ZQ (reprint author), ARGONNE NATL LAB, DIV MAT SCI, ARGONNE, IL 60439 USA. RI Bader, Samuel/A-2995-2013; Berger, Andreas/D-3706-2015; Qiu, Zi Qiang/O-4421-2016 OI Berger, Andreas/0000-0001-5865-6609; Qiu, Zi Qiang/0000-0003-0680-0714 NR 20 TC 61 Z9 66 U1 0 U2 4 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 2 PY 1992 VL 68 IS 9 BP 1398 EP 1401 DI 10.1103/PhysRevLett.68.1398 PG 4 WC Physics, Multidisciplinary SC Physics GA HF890 UT WOS:A1992HF89000038 ER PT J AU MASON, TE AEPPLI, G MOOK, HA AF MASON, TE AEPPLI, G MOOK, HA TI MAGNETIC DYNAMICS OF SUPERCONDUCTING LA1.86SR0.14CUO4 SO PHYSICAL REVIEW LETTERS LA English DT Article ID EXCITATIONS; SCATTERING AB The general magnetic response function chi(Q, omega) of a superconducting (T(c) = 33 K) single crystal of La1.86Sr0.14CuO4 is measured using inelastic neutron scattering. There is no gap in the magnetic fluctuation spectrum of the normal state. Superconductivity reduces chi"(Q, omega) in progressively greater proportion as HBAR-omega decreases below 6 meV. The superconducting transition coincides with a sharp maximum in the temperature-dependent chi"(Q, omega) for HBAR-omega = 4 meV and Q fixed at the incommensurate wave vector characterizing the magnetic fluctuations in the normal state. C1 RISO NATL LAB,DK-4000 ROSKILDE,DENMARK. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP MASON, TE (reprint author), AT&T BELL LABS,MURRAY HILL,NJ 07974, USA. RI Mason, Thomas/M-5809-2014 OI Mason, Thomas/0000-0003-1880-3971 NR 21 TC 295 Z9 295 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 MAR 2 PY 1992 VL 68 IS 9 BP 1414 EP 1417 DI 10.1103/PhysRevLett.68.1414 PG 4 WC Physics, Multidisciplinary SC Physics GA HF890 UT WOS:A1992HF89000042 ER PT J AU MUTO, V CHRISTIANSEN, PL LOMDAHL, PS AF MUTO, V CHRISTIANSEN, PL LOMDAHL, PS TI PERIODIC TRAVELING-WAVE SOLUTIONS OF A SET OF COUPLED BOUSSINESQ-LIKE EQUATIONS SO PHYSICS LETTERS A LA English DT Article AB The equations of motion of a Toda lattice with a transversal degree of freedom lead to a set of coupled partial differential equations of Boussinesq type in the continuum limit. A hybrid travelling wave solution is derived for finite length of the system with periodic boundary conditions. The stability of this cnoidal wave is investigated numerically. C1 UNIV CALIF LOS ALAMOS SCI LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. UNIV BASQUE COUNTRY, DEPT MATEMAT APL, E-48080 BILBAO, SPAIN. TECH UNIV DENMARK, APPL MATH PHYS LAB, DK-2800 LYNGBY, DENMARK. RP MUTO, V (reprint author), UNIV CALIF LOS ALAMOS SCI LAB, CTR NONLINEAR STUDIES, LOS ALAMOS, NM 87545 USA. RI Christiansen, Peter /A-7978-2011 OI Christiansen, Peter /0000-0002-1465-9987 NR 5 TC 2 Z9 2 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 MAR 2 PY 1992 VL 162 IS 6 BP 453 EP 456 DI 10.1016/0375-9601(92)90005-7 PG 4 WC Physics, Multidisciplinary SC Physics GA HJ106 UT WOS:A1992HJ10600005 ER PT J AU DIETZ, ML AF DIETZ, ML TI RACIST RELICS SO SCIENTIST LA English DT Letter RP DIETZ, ML (reprint author), ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439, USA. NR 1 TC 0 Z9 0 U1 1 U2 5 PU SCIENTIST INC PI PHILADELPHIA PA 3600 MARKET ST SUITE 450, PHILADELPHIA, PA 19104 SN 0890-3670 J9 SCIENTIST JI Scientist PD MAR 2 PY 1992 VL 6 IS 5 BP 12 EP 12 PG 1 WC Information Science & Library Science; Multidisciplinary Sciences SC Information Science & Library Science; Science & Technology - Other Topics GA HF426 UT WOS:A1992HF42600012 ER PT J AU WACHTER, EA MOORE, AK HAAS, JW AF WACHTER, EA MOORE, AK HAAS, JW TI FABRICATION OF TAILORED NEEDLE SUBSTRATES FOR SURFACE-ENHANCED RAMAN-SCATTERING SO VIBRATIONAL SPECTROSCOPY LA English DT Article DE RAMAN SPECTROMETRY; NEEDLE SUBSTRATES ID PARTICLES; FILMS AB Large-area arrays of metal needles have proved to be excellent substrates for surface-enhanced Raman scattering (SERS). Traditionally, these arrays are grown in a stochastic pattern on inherently rough surfaces using grazing-angle metal-vapor deposition. Control of needle spacing under such conditions is extremely difficult, making tailoring of optical performance impossible. Initial results from a new method for needle production, utilizing a carefully fabricated base layer as a foundation for needles having a regular, readily controlled pattern of growth, are presented. Needles ca. 50-75 nm in diameter with aspect ratios of 5:1 or greater are readily achieved. Further, arbitrary needle spacing appears possible by varying the characteristics of the base layer. Data are provided for several representative surfaces. RP WACHTER, EA (reprint author), OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,OAK RIDGE,TN 37831, USA. NR 10 TC 19 Z9 19 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0924-2031 J9 VIB SPECTROSC JI Vib. Spectrosc. PD MAR 2 PY 1992 VL 3 IS 1 BP 73 EP 78 DI 10.1016/0924-2031(92)85026-W PG 6 WC Chemistry, Analytical; Chemistry, Physical; Spectroscopy SC Chemistry; Spectroscopy GA HM943 UT WOS:A1992HM94300008 ER PT J AU BIEDENHARN, LC BINCER, AM LOHE, MA LOUCK, JD AF BIEDENHARN, LC BINCER, AM LOHE, MA LOUCK, JD TI NEW RELATIONS AND IDENTITIES FOR GENERALIZED HYPERGEOMETRIC COEFFICIENTS SO ADVANCES IN APPLIED MATHEMATICS LA English DT Article ID BIEDENHARN G-FUNCTIONS; TENSOR-OPERATORS; SERIES; SU(N); POLYNOMIALS; U(N); SYMMETRY; TABLEAUX; U(3) C1 UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706. NO TERR UNIV,DEPT MATH,CASUARINA,NT 0811,AUSTRALIA. UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP BIEDENHARN, LC (reprint author), DUKE UNIV,DEPT PHYS,DURHAM,NC 27706, USA. NR 35 TC 8 Z9 8 U1 1 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0196-8858 J9 ADV APPL MATH JI Adv. Appl. Math. PD MAR PY 1992 VL 13 IS 1 BP 62 EP 121 DI 10.1016/0196-8858(92)90004-G PG 60 WC Mathematics, Applied SC Mathematics GA HE307 UT WOS:A1992HE30700003 ER PT J AU STRICKLAND, JH AMOS, DE AF STRICKLAND, JH AMOS, DE TI FAST SOLVER FOR SYSTEMS OF AXISYMMETRICAL RING VORTICES SO AIAA JOURNAL LA English DT Article AB A method that is capable of efficient calculation of the axisymmetric flowfield produced by a large system of ring vortices is presented in this paper. The system of ring vortices can, in turn, be used to model body surfaces and wakes in incompressible unsteady axisymmetric flowfields. This method takes advantage of source-point and field-point series expansions, which enables one to make calculations for interactions between groups of vortices that are in well-separated spatial domains rather than having to consider interactions between every pair of vortices. A Fortran computer code RSOLV has been written to execute the fast solution technique. Test cases have been run to optimize the code and to benchmark the truncation errors and CPU time savings associated with the method. For 100 vortices in the field, there is virtually no CPU time savings with the fast solver. For 10,000 vortices in the flow, the fast solver obtains solutions in about 1-3% of the time required for the direct solution technique. Formulas for the self-induced velocity of discretized regions of the flowfield have been developed. Use of these formulas allows one to correctly convect discretized patches of vorticity in the flowfield. C1 SANDIA NATL LABS,DIV NUMER MATH,TECH STAFF,ALBUQUERQUE,NM 87185. RP STRICKLAND, JH (reprint author), SANDIA NATL LABS,DIV PARACHUTE SYST,TECH STAFF,ALBUQUERQUE,NM 87185, USA. NR 6 TC 10 Z9 10 U1 0 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0001-1452 J9 AIAA J JI AIAA J. PD MAR PY 1992 VL 30 IS 3 BP 737 EP 746 DI 10.2514/3.10979 PG 10 WC Engineering, Aerospace SC Engineering GA HJ908 UT WOS:A1992HJ90800021 ER PT J AU MASSOUDI, M RAJAGOPAL, KR EKMANN, JM MATHUR, MP AF MASSOUDI, M RAJAGOPAL, KR EKMANN, JM MATHUR, MP TI REMARKS ON THE MODELING OF FLUIDIZED SYSTEMS SO AICHE JOURNAL LA English DT Note ID HYDRODYNAMICS; BED; JET RP MASSOUDI, M (reprint author), US DOE,PITTSBURGH ENERGY TECHNOL CTR,PITTSBURGH,PA 15236, USA. NR 19 TC 40 Z9 44 U1 0 U2 3 PU AMER INST CHEMICAL ENGINEERS PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0001-1541 J9 AICHE J JI AICHE J. PD MAR PY 1992 VL 38 IS 3 BP 471 EP 472 DI 10.1002/aic.690380317 PG 2 WC Engineering, Chemical SC Engineering GA HJ889 UT WOS:A1992HJ88900016 ER PT J AU MYERS, G MACINNES, K KORBER, B AF MYERS, G MACINNES, K KORBER, B TI THE EMERGENCE OF SIMIAN HUMAN IMMUNODEFICIENCY VIRUSES SO AIDS RESEARCH AND HUMAN RETROVIRUSES LA English DT Article ID AFRICAN-GREEN MONKEYS; NUCLEOTIDE-SEQUENCE ANALYSIS; SEROEPIDEMIOLOGIC SURVEY; PHYLOGENETIC HISTORY; GENOME ORGANIZATION; AIDS VIRUSES; RETROVIRUSES; TYPE-1; LENTIVIRUSES; EVOLUTION AB Molecular evolutionary analyses strongly support the hypothesis that human immunodeficiency viruses have recently arisen from a diverse pool of nonhuman primate immunodeficiency viruses. Our understanding of the molecular phylogenetic relationships between primate and nonprimate lentiviruses is less certain, partly because key intermediate forms are still to be discovered. DNA and protein sequence comparisons reveal uncanny dissimilarities, as well as similarities, among the genetic sequences of these complex retroviruses, thereby giving rise to the notion that primate lentiviruses are participants in "fast-forward" evolution. RP MYERS, G (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,T-10 MSK710,LOS ALAMOS,NM 87545, USA. OI Korber, Bette/0000-0002-2026-5757 NR 91 TC 115 Z9 115 U1 0 U2 0 PU MARY ANN LIEBERT INC PUBL PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 SN 0889-2229 J9 AIDS RES HUM RETROV JI Aids Res. Hum. Retrovir. PD MAR PY 1992 VL 8 IS 3 BP 373 EP 386 DI 10.1089/aid.1992.8.373 PG 14 WC Immunology; Infectious Diseases; Virology SC Immunology; Infectious Diseases; Virology GA HK848 UT WOS:A1992HK84800007 PM 1571197 ER PT J AU SUPERKO, HR AF SUPERKO, HR TI EFFECTS OF ACUTE AND CHRONIC ALCOHOL-CONSUMPTION ON POSTPRANDIAL LIPEMIA IN HEALTHY NORMOTRIGLYCERIDEMIC MEN SO AMERICAN JOURNAL OF CARDIOLOGY LA English DT Note ID LIPOPROTEINS; ETHANOL C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV RES MED,CHOLESTEROL RES CTR,BERKELEY,CA 94720. OI Superko, H. Robert/0000-0002-3542-0393 NR 9 TC 14 Z9 14 U1 0 U2 0 PU EXCERPTA MEDICA INC PI NEW YORK PA 245 WEST 17TH STREET, NEW YORK, NY 10011 SN 0002-9149 J9 AM J CARDIOL JI Am. J. Cardiol. PD MAR 1 PY 1992 VL 69 IS 6 BP 701 EP 704 DI 10.1016/0002-9149(92)90172-U PG 4 WC Cardiac & Cardiovascular Systems SC Cardiovascular System & Cardiology GA HF437 UT WOS:A1992HF43700029 PM 1536126 ER PT J AU MCCRAY, PB BETTENCOURT, JD BASTACKY, J AF MCCRAY, PB BETTENCOURT, JD BASTACKY, J TI DEVELOPING BRONCHOPULMONARY EPITHELIUM OF THE HUMAN FETUS SECRETES FLUID SO AMERICAN JOURNAL OF PHYSIOLOGY LA English DT Article DE FETAL PULMONARY EPITHELIAL CELLS; SECRETION; ION TRANSPORT; HUMAN FETAL LUNG DEVELOPMENT; FETAL CELLS; ORGAN CULTURE ID FETAL LUNG INVITRO; ION-TRANSPORT; II CELLS; TRACHEAL EPITHELIA; SUBMERSION CULTURE; ALVEOLAR; MONOLAYERS; LIQUID; ABSORPTION; LAMB AB We studied human fetal lung tissue in submersion organ culture to determine whether the bronchopulmonary epithelium secretes fluid during development. In this system the acinar tubules continued to grow, secrete fluid, and become progressively dilated. Baseline transepithelial potential differences (PSI(t)) of -0.5 to -11 mV (mean, -3.8 mV, lumen negative, n = 27) were measured with microelectrodes after 3-8 days in culture, suggesting active electrolyte transport. Bumetanide (500-mu-M), an inhibitor of chloride secretion in other systems, decreased the basal PSI(t) from -5 +/- 1.5 to -3.2 +/- 1.6 (SE) mV (P < 0.05, n = 6), suggesting that chloride transport contributed to the voltage. Isoproterenol (5-mu-M) increased the baseline PSI(t) from -5.6 +/- 2.1 to -9.2 +/- 2.5 (SE) mV (P < 0.05, n = 4). Subsequent addition of bumetanide inhibited the isoproterenol-induced stimulation of the PSI(t) by 20% (P < 0.05). 8-(4-chlorophenylthio)adenosine 3',5'-cyclic monophosphate. (CPT-cAMP, 50-mu-M) and 3-isobutyl 1-methylxanthine (IBMX, 100-mu-M) had similar effects, causing an increase in the PSI(t) from -2.2 +/- 0.5 to -8 +/- 1.6 (SE) mV, an effect that was inhibited by the addition of bumetanide (P < 0.005, n = 6). Both isoproterenol and CPT-cAMP/IBMX produced significant increases in the percentage luminal area of the explants at 12 and 24 h after exposure compared with control. We conclude that 1) the developing bronchopulmonary epithelium (acinar tubules) contributes to lung fluid production in the human fetus, 2) fetal lung fluid secretion is chloride dependent, and 3) chloride secretion and fluid secretion may be stimulated by a beta-agonist and cAMP. C1 CHILDRENS HOSP,DEPT PULM,OAKLAND,CA 94609. CHILDRENS HOSP,PULM RES INST,OAKLAND,CA 94609. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. FU NHLBI NIH HHS [HL-40521]; NICHD NIH HHS [HD-000836]; NIDCR NIH HHS [DE-AC03-76SF00098] NR 30 TC 37 Z9 37 U1 0 U2 0 PU AMER PHYSIOLOGICAL SOC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0002-9513 J9 AM J PHYSIOL JI Am. J. Physiol. PD MAR PY 1992 VL 262 IS 3 BP L270 EP L279 PN 1 PG 10 WC Physiology SC Physiology GA HK362 UT WOS:A1992HK36200085 PM 1372486 ER PT J AU CRAGLE, DL FETCHER, A AF CRAGLE, DL FETCHER, A TI RISK-FACTORS ASSOCIATED WITH THE CLASSIFICATION OF UNSPECIFIED AND OR UNEXPLAINED CAUSES OF DEATH IN AN OCCUPATIONAL COHORT SO AMERICAN JOURNAL OF PUBLIC HEALTH LA English DT Note AB In a matched case-control study of an occupational cohort in East Tennessee, data from the death certificates of 608 cases and controls were abstracted and analyzed in order to investigate possible risk factors associated with the certification on the death certificate of an ill-defined cause of death. There was a very strong association between the ill-defined classification and the certifier, especially if the certifier was a medical examiner (OR = 10.4, 95% CI: 6.0, 18.0). C1 UNIV TENNESSEE,KNOXVILLE,TN 37996. RP CRAGLE, DL (reprint author), OAK RIDGE ASSOCIATED UNIV,CTR EPIDEMIOL RES,POB 117,OAK RIDGE,TN 37831, USA. NR 4 TC 6 Z9 6 U1 0 U2 1 PU AMER PUBLIC HEALTH ASSOC INC PI WASHINGTON PA 1015 FIFTEENTH ST NW, WASHINGTON, DC 20005 SN 0090-0036 J9 AM J PUBLIC HEALTH JI Am. J. Public Health PD MAR PY 1992 VL 82 IS 3 BP 455 EP 457 DI 10.2105/AJPH.82.3.455 PG 3 WC Public, Environmental & Occupational Health SC Public, Environmental & Occupational Health GA HL802 UT WOS:A1992HL80200028 PM 1536370 ER PT J AU WELLER, RE BAER, JF VALENTINE, NB BUSCHBOM, RL RAGAN, HA MALAGA, CA AF WELLER, RE BAER, JF VALENTINE, NB BUSCHBOM, RL RAGAN, HA MALAGA, CA TI SUSCEPTIBILITY OF OWL MONKEYS TO PLASMODIUM-FALCIPARUM IN RELATION TO HEMOGLOBIN AND KARYOTYPE SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE LA English DT Article ID AOTUS-TRIVIRGATUS; INFECTIONS AB Humans with inherited abnormalities of hemoglobin (Hb) synthesis have less frequent and less severe infections of malaria. This study sought to determine if karyotypic variation in the owl monkey was expressed as differences in Hb moieties and if it offered a selective advantage in susceptibility to malaria. Five karyotypes of owl monkey were evaluated on the basis of the electrophoretic mobility of their major and minor Hb components. The results of 40 owl monkeys of different karyotypes demonstrated that statistically significant differences exist among karyotype I animals and those with karyotypes II, III, and V, particularly with regard to their HbA2 concentrations. This finding is of interest in light of the fact that karyotype I animals are considered to be less susceptible to infection with human strains of Plasmodium falciparum than karyotypes II, III, and V, which are viewed as being highly susceptible. RP WELLER, RE (reprint author), PACIFIC NW LAB, DEV TOXICOL SECT, RICHLAND, WA 99352 USA. NR 25 TC 4 Z9 4 U1 0 U2 0 PU AMER SOC TROP MED & HYGIENE PI MCLEAN PA 8000 WESTPARK DRIVE SUITE 130, MCLEAN, VA 22101 SN 0002-9637 J9 AM J TROP MED HYG JI Am. J. Trop. Med. Hyg. PD MAR PY 1992 VL 46 IS 3 BP 366 EP 370 PG 5 WC Public, Environmental & Occupational Health; Tropical Medicine SC Public, Environmental & Occupational Health; Tropical Medicine GA HM470 UT WOS:A1992HM47000019 PM 1558276 ER PT J AU GUTHRIE, GD AF GUTHRIE, GD TI BIOLOGICAL EFFECTS OF INHALED MINERALS SO AMERICAN MINERALOGIST LA English DT Review ID CHINA-CLAY WORKERS; CYTO-TOXICITY; CROCIDOLITE ASBESTOS; QUANTITATIVE-ANALYSIS; FIBROUS ERIONITE; KAOLIN WORKERS; ORGAN-CULTURES; FIBERS; LUNG; INVITRO AB Numerous studies present data on the biological effects of inhaled minerals, but these data are often disseminated within reports that primarily address the asbestos minerals. Furthermore, these reports are normally published in journals that are unfamiliar to most minerals scientists. This review compiles these data in order to facilitate an understanding of the known biological effects of minerals. An introduction to the types of studies from which the data were drawn is given so that those unfamiliar with such studies can assess the data critically. In general, minerals exhibit a range of biological activities from apparently inactive or slightly active, such as hematite, to highly fibrogenic and carcinogenic, such as fibrous brucite ("nemalite"). The zeolites also exhibit such a range, with some mordenite being slightly active and erionite being highly active; however, erionite is the only zeolite that has been studied extensively. Although several mechanisms have been proposed to explain how minerals induce disease, it is still unclear why minerals exhibit a range in biological activity. The diversity of mineral species holds great potential for probing these mechanisms, especially when mineralogical data are integrated with biological data. Unfortunately, many of the studies reporting data on the biological effects of inhaled minerals fail to report detailed mineralogical information; hence, it is difficult at present to interpret the biological activities of minerals in terms of their physical and chemical properties. More collaboration between minerals scientists and health scientists would benefit this area of research by enabling an integration of mineralogical and biological data. Important mineralogical data that are only rarely considered in biological research include exact mineral content of the specimen (i.e., identification and abundance of contaminants), physical and chemical properties of minerals, and surface properties of minerals. RP GUTHRIE, GD (reprint author), UNIV CALIF LOS ALAMOS SCI LAB, MS D469, LOS ALAMOS, NM 87545 USA. NR 142 TC 50 Z9 50 U1 0 U2 0 PU MINERALOGICAL SOC AMER PI CHANTILLY PA 3635 CONCORDE PKWY STE 500, CHANTILLY, VA 20151-1125 USA SN 0003-004X EI 1945-3027 J9 AM MINERAL JI Am. Miner. PD MAR-APR PY 1992 VL 77 IS 3-4 BP 225 EP 243 PG 19 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA HP581 UT WOS:A1992HP58100001 ER PT J AU BISH, DL BURNHAM, CW AF BISH, DL BURNHAM, CW TI RIETVELD REFINEMENT OF THE CRYSTAL-STRUCTURE OF FIBROLYTIC SILLIMANITE USING NEUTRON POWDER DIFFRACTION DATA SO AMERICAN MINERALOGIST LA English DT Article ID AL2SIO5 POLYMORPHS; PHASE-DIAGRAM; ANDALUSITE AB The crystal structure of natural fibrolite collected from a granulite in Brittany, France, has been refined using time-of-flight neutron powder diffraction data and the Rietveld method. Lattice parameters [a = 7.4841(3) angstrom, b = 7.6720(3) angstrom, and c = 5.7707(2) angstrom] and structural parameters, including temperature factors, are in close agreement with those previously reported for sillimanite. Both refined site occupancies and [4]Si,Al-O interatomic distances, however, show that this fibrolite has tetrahedral site occupancies reflecting approximately 18% disorder (i.e., approximately 9% Al in the [4]Si site and approximately 9% Si in the [4]Al site). The neutron diffraction profile parameters reveal little or no crystallite-size broadening but a small amount of isotropic strain broadening, possibly due to a combination of the partial Al-Si disorder and the defect structure of fibrolite. Analysis of sillimanite disordering thermodynamics strongly suggests that the observed tetrahedral cation disorder is not the result of an equilibrium disordering process. C1 HARVARD UNIV,DEPT EARTH & PLANETARY SCI,CAMBRIDGE,MA 02138. RP BISH, DL (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,MS 0469,LOS ALAMOS,NM 87545, USA. NR 25 TC 9 Z9 9 U1 1 U2 6 PU MINERALOGICAL SOC AMER PI WASHINGTON PA 1130 17TH ST NW SUITE 330, WASHINGTON, DC 20036 SN 0003-004X J9 AM MINERAL JI Am. Miner. PD MAR-APR PY 1992 VL 77 IS 3-4 BP 374 EP 379 PG 6 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA HP581 UT WOS:A1992HP58100015 ER PT J AU DONOVAN, JJ RIVERS, ML ARMSTRONG, JT AF DONOVAN, JJ RIVERS, ML ARMSTRONG, JT TI PRSUPR - AUTOMATION AND ANALYSIS SOFTWARE FOR WAVELENGTH DISPERSIVE ELECTRON-BEAM MICROANALYSIS ON A PC SO AMERICAN MINERALOGIST LA English DT Article AB PRSUPR, an integrated program to acquire data from multiple fixed or scanning spectrometer electron microprobes, is described. X-ray count and coordinate data are automatically stored to random-access disk files for on-line or off-line data processing using the CITZAF sample matrix correction library. A complete set of unknown and standard sample automation features is fully integrated into the program. Extensive documentation and a simple installation program are provided for the nonprogrammer. The program operates on a standard IBM PC or compatible and supports automation, acquisition, and quantitative analysis for a wide variety of microprobe hardware configurations. C1 BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE,UPTON,NY 11973. CALTECH,DIV GEOL & PLANETARY SCI,PASADENA,CA 91125. RP DONOVAN, JJ (reprint author), UNIV CALIF BERKELEY,DEPT GEOL & GEOPHYS,BERKELEY,CA 94720, USA. NR 6 TC 19 Z9 19 U1 2 U2 2 PU MINERALOGICAL SOC AMER PI WASHINGTON PA 1130 17TH ST NW SUITE 330, WASHINGTON, DC 20036 SN 0003-004X J9 AM MINERAL JI Am. Miner. PD MAR-APR PY 1992 VL 77 IS 3-4 BP 444 EP 445 PG 2 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA HP581 UT WOS:A1992HP58100024 ER PT J AU FELDMAN, DL AF FELDMAN, DL TI THE REACH AND GRASP OF POLICY ANALYSIS - COMPARATIVE VIEWS OF THE CRAFT - HOFFERBERT,RI SO AMERICAN POLITICAL SCIENCE REVIEW LA English DT Book Review RP FELDMAN, DL (reprint author), UNIV TENNESSEE,OAK RIDGE NATL LAB,KNOXVILLE,TN 37996, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER POLITICAL SCIENCE ASSOC PI WASHINGTON PA 1527 NEW HAMPSHIRE N W, WASHINGTON, DC 20036 SN 0003-0554 J9 AM POLIT SCI REV JI Am. Polit. Sci. Rev. PD MAR PY 1992 VL 86 IS 1 BP 240 EP 240 DI 10.2307/1964059 PG 1 WC Political Science SC Government & Law GA HK862 UT WOS:A1992HK86200073 ER PT J AU BIERMAN, P GILLESPIE, A HARRINGTON, C RAYMOND, R RENEAU, S MCFADDEN, L WELLS, S AF BIERMAN, P GILLESPIE, A HARRINGTON, C RAYMOND, R RENEAU, S MCFADDEN, L WELLS, S TI THROWING ROCKS SO AMERICAN SCIENTIST LA English DT Letter C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87544. UNIV NEW MEXICO,ALBUQUERQUE,NM 87131. UNIV CALIF RIVERSIDE,RIVERSIDE,CA 92521. RP BIERMAN, P (reprint author), UNIV WASHINGTON,SEATTLE,WA 98195, USA. NR 10 TC 1 Z9 1 U1 0 U2 1 PU SIGMA XI-SCI RES SOC PI RES TRIANGLE PK PA PO BOX 13975, RES TRIANGLE PK, NC 27709 SN 0003-0996 J9 AM SCI JI Am. Scientist PD MAR-APR PY 1992 VL 80 IS 2 BP 110 EP & PG 0 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA HL862 UT WOS:A1992HL86200005 ER PT J AU PAL, A WATTS, W CARAWAY, J VO-DINH, T AF PAL, A WATTS, W CARAWAY, J VO-DINH, T TI ENHANCED ROOM-TEMPERATURE PHOSPHORESCENCE USING SODIUM LAURYL SULFATE TREATED SOLID SUBSTRATE SO ANALUSIS LA English DT Article DE ROOM-TEMPERATURE PHOSPHORESCENCE; AROCLOR; SOIL ID POLYCHLORINATED-BIPHENYLS; LUMINESCENCE AB The analytical usefulness of a simple method based on room-temperature phosphorescence (RTP) using paper substrate treated with sodium lauryl sulfate (NaLS) in conjunction with thallium acetate has been investigated. This approach is practical and rapid and has been found to be sensitive for a variety of mixtures of polychlorinated biphenyls (PCBs) used as the model compounds. Experimental parameters, such as LOD, enhancement factors (F), relative standard deviation (RSD), phosphorescence lifetimes, excitation and emission wavelengths for several PCB mixtures were illustrated. Other factors including the concentration of NaLS, the sequence of delivery of analyte, NaLS, and heavy atom salts, the type of paper substrate and PCB-spiked soil extract samples were also investigated. The use of NaLS as an enhancing agent in RTP measurement of environmental samples is attractive since the procedure offers sensitivity and can be readily applied to the routine analysis of contaminated environmental soil samples containing trace levels of organic pollutants. C1 OAK RIDGE NATL LAB, DIV HLTH & SAFETY RES, ADV MONITORING DEV GRP, OAK RIDGE, TN 37831 USA. NR 12 TC 14 Z9 14 U1 0 U2 0 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0365-4877 J9 ANALUSIS JI Analusis PD MAR PY 1992 VL 20 IS 3 BP 149 EP 153 PG 5 WC Chemistry, Analytical SC Chemistry GA HG357 UT WOS:A1992HG35700026 ER PT J AU MACNEILL, G DUFFY, JT CUNNINGHAM, JD COULTER, B DIAMOND, S MCAULAY, IR MORAN, D AF MACNEILL, G DUFFY, JT CUNNINGHAM, JD COULTER, B DIAMOND, S MCAULAY, IR MORAN, D TI TRANSFER CHARACTERISTICS OF RADIOCESIUM FROM SOILS TO PERMANENT PASTURE SO ANALYST LA English DT Article; Proceedings Paper CT 27TH INTERNATIONAL COLLOQUIUM ON SPECTROSCOPY CY JUN, 1991 CL NORWAY DE RADIOCESIUM; SOIL; PASTURE; SOIL PARAMETERS; CONCENTRATION RATIO AB Depth profile measurements of Cs-137 and Cs-134 were carried out in 11 permanent pastures that had been exposed to fallout from the Chernobyl accident. In addition to gamma-ray spectrometric analysis, the selected pastures were characterized by several soil parameters, the influence of which on transfer was investigated. Sampling of soil and pasture grass was undertaken during a period extending from the Spring of 1987 to the Autumn of 1988. The results show that there has been limited downward migration of Chernobyl-derived caesium. In October 1988 more than 88% of the Cs-137 attributable to Chernobyl was mainly confined to the top 10 cm of undisturbed soil, with 79% on average in the top 5 cm. The distribution of pre-Chernobyl caesium at the 11 sites was also evaluated. In an investigation of the influence of soil parameters on transfer to grass, a negative correlation with pH was observed in 1987. In April 1987 concentration ratios for Cs-137 in grass ranged from 0.03 to 0.49. In general, comparison of the concentration ratio values showed a decreasing trend over the 18 months. C1 NUCL ENERGY BOARD,3 CLONSKEAGH SQ,CLONSKEAGH RD,DUBLIN 14,IRELAND. TEAGASC,AGR & FOOD DEV AUTHOR,WEXFORD,IRELAND. UNIV DUBLIN TRINITY COLL,DEPT PURE & APPL PHYS,DUBLIN 2,IRELAND. NR 12 TC 2 Z9 2 U1 0 U2 0 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND CB4 4WF SN 0003-2654 J9 ANALYST JI Analyst PD MAR PY 1992 VL 117 IS 3 BP 521 EP 524 DI 10.1039/an9921700521 PG 4 WC Chemistry, Analytical SC Chemistry GA HM863 UT WOS:A1992HM86300055 PM 1580393 ER PT J AU SHUM, SCK NEDDERSEN, R HOUK, RS AF SHUM, SCK NEDDERSEN, R HOUK, RS TI ELEMENTAL SPECIATION BY LIQUID-CHROMATOGRAPHY INDUCTIVELY COUPLED PLASMA MASS-SPECTROMETRY WITH DIRECT INJECTION NEBULIZATION SO ANALYST LA English DT Article; Proceedings Paper CT 27TH INTERNATIONAL COLLOQUIUM ON SPECTROSCOPY CY JUN, 1991 CL NORWAY DE SPECIATION; INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY; DIRECT INJECTION NEBULIZER; LIQUID CHROMATOGRAPHY; ARSENIC AND TIN SPECIES ID ATOMIC EMISSION-SPECTROMETRY; CONCOMITANT ELEMENTS; SAMPLE INTRODUCTION; ORGANIC-SOLVENTS; ANALYTE SIGNAL; ICP-MS; INTERFERENCES; SPECTROSCOPY; SUPPRESSION; DETECTOR AB A new version of the direct injection nebulizer (DIN) is used to interface liquid chromatographic (LC) separations with element-selective detection using inductively coupled plasma mass spectrometry (ICP-MS). The DIN injects all of the sample into the ICP and has a dead volume of less than 1-mu-l. Charged species of arsenic and tin are separated as ion pairs on a micro-scale (1 mm i.d.), packed, reversed-phase column. Detection limits are 0.2-0.6 pg for arsenic and 8-10 pg for tin. For methanol + water eluents, the signal is highest at 25% methanol and stays within 25% of this maximum as the methanol fraction is varied from 20 to 80%. Compared with LC-ICP-MS with conventional nebulizers, the absolute detection limits and chromatographic resolution are substantially superior, and the dependence of analyte signal on solvent composition is somewhat less severe with the DIN. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,US DOE,AMES LAB,AMES,IA 50011. NR 41 TC 108 Z9 110 U1 1 U2 8 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND CB4 4WF SN 0003-2654 J9 ANALYST JI Analyst PD MAR PY 1992 VL 117 IS 3 BP 577 EP 582 DI 10.1039/an9921700577 PG 6 WC Chemistry, Analytical SC Chemistry GA HM863 UT WOS:A1992HM86300067 PM 1580404 ER PT J AU NOGAR, NS ESTLER, RC AF NOGAR, NS ESTLER, RC TI CHROMIUM DETECTION BY LASER DESORPTION AND RESONANCE IONIZATION MASS-SPECTROMETRY SO ANALYTICAL CHEMISTRY LA English DT Article ID INDUCED FLUORESCENCE; OPTICAL-DAMAGE; TRACE ANALYSIS; SPECTROSCOPY; ABLATION; BEHAVIOR; SOLIDS; ATOMS; SOILS; FORMS AB Chromium was measured by resonance Ionization mass spectrometry combined with laser desorption. The desorption process produced a plume of analyte with a temperature almost-equal-to 1000 K. Ionization was effected by a 2 + 1 (photons to resonance + photons to ionize) process, with the first step involving two-photon excitation of the (3d5(5)s1) S-7(3) <-- (3d5(4)s1) S(7)3 transition. Saturation curves were used to estimate the cross sections for these processes: model parameter fits indicate sigma(2h-nu) = (5 +/- 2) x 10(-44) cm4.s, sigma(I) = (7 +/- 4) X 10(-18) cm2. The detection limit for this analysis was almost-equal-to 10 fg. This limit could be improved significantly by altering the geometry for the analysis. C1 FT LEWIS COLL,DEPT CHEM,DURANGO,CO 81301. RP NOGAR, NS (reprint author), LOS ALAMOS NATL LAB,DIV CHEM & LASER SCI,MS J565,LOS ALAMOS,NM 87545, USA. NR 40 TC 17 Z9 17 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD MAR 1 PY 1992 VL 64 IS 5 BP 465 EP 468 DI 10.1021/ac00029a003 PG 4 WC Chemistry, Analytical SC Chemistry GA HF872 UT WOS:A1992HF87200006 ER PT J AU SPIEGEL, DR CALAWAY, WF DAVIS, AM BURNETT, JW PELLIN, MJ COON, SR YOUNG, CE CLAYTON, RN GRUEN, DM AF SPIEGEL, DR CALAWAY, WF DAVIS, AM BURNETT, JW PELLIN, MJ COON, SR YOUNG, CE CLAYTON, RN GRUEN, DM TI 3-COLOR RESONANCE IONIZATION OF TITANIUM SPUTTERED FROM METAL AND OXIDES FOR COSMOCHEMICAL ANALYSES - MEASUREMENTS OF SELECTIVITY AND ISOTOPE ANOMALIES SO ANALYTICAL CHEMISTRY LA English DT Article ID MURCHISON CARBONACEOUS CHONDRITE; MASS-SPECTROMETRY; REFRACTORY INCLUSIONS; PRIMITIVE METEORITES; MURRAY HIBONITES; TI-50 ANOMALIES; ION-BOMBARDMENT; SPECTROSCOPY; RATIOS; ATOMS AB Three-color resonance ionization mass spectrometry (RIMS) measurements of sputtered Ti have been carried out on several oxides containing both Ti and (isobarically interfering) Ca in order to evaluate microbeam RIMS as a tool for isotopic analyses of meteoritic samples. The elemental selectivities of Ti over Ca, all measured at saturating laser intensities, are in the range of 100 +/- 20 to 500 +/- 150, with the largest selectivity obtained in hibonite. We have also carried out experiments on TiO2 and Ti metal. RIMS measurements of Ti isotope ratios are reported for each material. We find that the odd ratios (47/48, 49/48) are consistently enhanced over standard values by as much as 48%, while the even ratios (46/48, 50/48) are much closer to their standard values. This odd-even effect probably arises from differences in laser ionization efficiencies due to hyperfine structure and should not hinder RIMS searches for isotope anomalles if isotopic abundances are measured in both an unknown and a standard. Finally, we have tested the precision and sensitivity of the SARISA apparatus for meteoritic applications by using a three-color RIMS scheme to measure Ti isotope anomalies in BB-5, a hibonite-rich inclusion taken from the Murchison meteorite. A Ti-50 deficit (previously observed in SIMS studies) and a neutron activation-induced Ti-49 excess are readily measurable by the SARISA technique. Less than 5 X 10(10)) Ti atoms were removed from the BB-5 sample during the acquisition of the RIMS data. C1 UNIV CHICAGO,ENRICO FERMI INST,CHICAGO,IL 60637. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV CHEM TECHNOL,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. RI Pellin, Michael/B-5897-2008 OI Pellin, Michael/0000-0002-8149-9768 NR 46 TC 27 Z9 27 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD MAR 1 PY 1992 VL 64 IS 5 BP 469 EP 475 DI 10.1021/ac00029a004 PG 7 WC Chemistry, Analytical SC Chemistry GA HF872 UT WOS:A1992HF87200007 ER PT J AU LEE, I CALLCOTT, TA ARAKAWA, ET AF LEE, I CALLCOTT, TA ARAKAWA, ET TI LASER-INDUCED SURFACE-PLASMON DESORPTION OF DYE MOLECULES FROM ALUMINUM FILMS SO ANALYTICAL CHEMISTRY LA English DT Article ID INDUCED THERMAL-DESORPTION; NONRESONANT MULTIPHOTON IONIZATION; VIBRATIONAL-EXCITATION; MASS-SPECTROMETRY; METAL PARTICLES; PHOTODESORPTION; PHOTODISSOCIATION; ADSORBATES; RESONANCE AB Rhodamine B molecules were desorbed without fragmentation from the surface of an Al film by surface-plasmon-induced desorption. Surface plasmons were excited in the Al film by the second harmonic of a Nd:YAG laser in an attenuated-total-reflection (ATR) geometry. The desorbed neutrals were ionized by a XeCl excimer laser and detected by a time-of-flight mass spectrometer. The desorption yields of both Al and rhodamine B showed a dependence with incidence angle which peaked at the plasmon resonance angle. The thresholds for desorption of Al and rhodamine B occur at the same laser fluence. Two models are proposed to explain these observations. C1 UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996. RP LEE, I (reprint author), OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,OAK RIDGE,TN 37830, USA. NR 30 TC 15 Z9 16 U1 1 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD MAR 1 PY 1992 VL 64 IS 5 BP 476 EP 478 DI 10.1021/ac00029a005 PG 3 WC Chemistry, Analytical SC Chemistry GA HF872 UT WOS:A1992HF87200008 ER PT J AU WHANG, CW YEUNG, ES AF WHANG, CW YEUNG, ES TI TEMPERATURE PROGRAMMING IN CAPILLARY ZONE ELECTROPHORESIS SO ANALYTICAL CHEMISTRY LA English DT Article ID LIQUID-CHROMATOGRAPHY; SILICA CAPILLARIES; MICELLAR SOLUTIONS; PH GRADIENTS; SEPARATION; PROTEINS; FLUORESCEIN; GENERATION; EFFICIENCY; COLUMN AB A new type of selectivity In capillary zone electrophoresis (CZE) based on temperature programming is presented. By using a buffer system with a large temperature coefficient, e.g. Tris buffer, the pH within the capillary can be adjusted In situ by simply controlling the temperature of the capillary. The electromigration behavior of weak acids is found to be influenced by both temperature-induced pH changes and viscosity changes. The effect of pH on the electrophoretic mobilities of analytes is most significant if the range of pH change matches the acidity constants, pK(a), of the analytes. The implementation of temperature programming in both temporal and positional modes in CZE are illustrated by the separation of a mixture of fluorescent organic acids. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 29 TC 39 Z9 40 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD MAR 1 PY 1992 VL 64 IS 5 BP 502 EP 506 DI 10.1021/ac00029a010 PG 5 WC Chemistry, Analytical SC Chemistry GA HF872 UT WOS:A1992HF87200013 ER PT J AU JACOBSON, KB ARLINGHAUS, HF AF JACOBSON, KB ARLINGHAUS, HF TI DEVELOPMENT OF RESONANCE IONIZATION SPECTROSCOPY FOR DNA SEQUENCING AND GENOME MAPPING SO ANALYTICAL CHEMISTRY LA English DT Article ID POLYMERASE CHAIN-REACTION; ONE-ATOM DETECTION; PROJECT C1 ATOM SCI INC,OAK RIDGE,TN 37830. UNIV TENNESSEE,GRAD SCH BIOMED SCI,OAK RIDGE,TN. RP JACOBSON, KB (reprint author), OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831, USA. NR 28 TC 15 Z9 15 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD MAR 1 PY 1992 VL 64 IS 5 BP A315 EP & DI 10.1021/ac00029a001 PG 0 WC Chemistry, Analytical SC Chemistry GA HF872 UT WOS:A1992HF87200004 PM 1575318 ER PT J AU PEREZ, RB OTADUY, PJ ABDALLA, M AF PEREZ, RB OTADUY, PJ ABDALLA, M TI NONLINEAR CLOSED-LOOP CONTROL-THEORY SO ANNALS OF NUCLEAR ENERGY LA English DT Article C1 OAK RIDGE NATL LAB,DIV INSTRUMENTAT & CONTROLS,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,DIV ENGN TECHNOL,OAK RIDGE,TN 37831. RP PEREZ, RB (reprint author), UNIV TENNESSEE,DEPT NUCL ENGN,POB 2008,KNOXVILLE,TN 37996, USA. NR 14 TC 2 Z9 2 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0306-4549 J9 ANN NUCL ENERGY JI Ann. Nucl. Energy PD MAR PY 1992 VL 19 IS 3 BP 123 EP 143 DI 10.1016/S0306-4549(06)80010-1 PG 21 WC Nuclear Science & Technology SC Nuclear Science & Technology GA HG339 UT WOS:A1992HG33900002 ER PT J AU LEE, YY GOODMAN, BJ AF LEE, YY GOODMAN, BJ TI THERMAL, CHEMICAL, AND BIOLOGICAL PROCESSING SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Editorial Material C1 SOLAR ENERGY RES INST,GOLDEN,CO 80401. RP LEE, YY (reprint author), AUBURN UNIV,AUBURN,AL 36830, USA. NR 0 TC 21 Z9 21 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 3 EP 4 DI 10.1007/BF02920529 PG 2 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500002 ER PT J AU TORGET, R HIMMEL, M GROHMANN, K AF TORGET, R HIMMEL, M GROHMANN, K TI DILUTE-ACID PRETREATMENT OF 2 SHORT-ROTATION HERBACEOUS CROPS - SCIENTIFIC NOTE SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 13TH SYMP ON BIOTECHNOLOGY FOR FUELS AND CHEMICALS CY MAY 06-10, 1991 CL COLORADO SPRINGS, CO SP US DOE, NATL RENEWABLE ENERGY LAB, OAK RIDGE NATL LAB, GAS RES INST, BADGER ENGINEERS, COLORADO INST RES BIOTECHNOL, AMER CHEM SOC DE DILUTE-ACID PRETREATMENT; SHORT-ROTATION CROPS; HERBACEOUS; CELLULASE DIGESTION ID PLANT RP TORGET, R (reprint author), SOLAR ENERGY RES INST,DIV FUELS & CHEM RES & ENGN,BIOTECHNOL RES BRANCH,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 20 TC 30 Z9 31 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 115 EP 123 DI 10.1007/BF02920538 PG 9 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500011 ER PT J AU STRANDBERG, GW DEMAIN, AL AF STRANDBERG, GW DEMAIN, AL TI APPLIED BIOLOGICAL-RESEARCH SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Editorial Material C1 MIT,CAMBRIDGE,MA 02139. RP STRANDBERG, GW (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 133 EP 134 DI 10.1007/BF02920540 PG 2 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500013 ER PT J AU BAKER, JO TATSUMOTO, K GROHMANN, K WOODWARD, J WICHERT, JM SHOEMAKER, SP HIMMEL, ME AF BAKER, JO TATSUMOTO, K GROHMANN, K WOODWARD, J WICHERT, JM SHOEMAKER, SP HIMMEL, ME TI THERMAL-DENATURATION OF TRICHODERMA-REESEI CELLULASES STUDIED BY DIFFERENTIAL SCANNING CALORIMETRY AND TRYPTOPHAN FLUORESCENCE SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article DE THERMAL PROTEIN DENATURATION; T-REESEI CELLULASES ID CELLOBIOHYDROLASE-I; CORE PROTEIN; ENDOGLUCANASE; SYNERGISM; CELLULOSE; BINDING; ENZYME; DOMAIN; GENE; STRAIN-L27 AB The thermal denaturation of four purified Trichoderma reesei cellulase components, cellobiohydrolase (CBH) I, CBH II, endoglucanase (EG) I, and EG II, has been monitored using a combination of classical temperature/activity profiles, differential scanning calorimetry (DSC), and thermal scanning fluorescence emission spectrometry. Significant correlations were found between the results of enzyme activity studies and the results obtained through the more direct physical approaches, in that both DSC and the activity studies showed EG II (T(m) = 75-degrees-C) to be much more thermostable (by 10-11-degrees-C) than the other three enzymes, all three of which were shown by both activity profiles and DSC to be very similar in thermal stability. The temperature dependence of the wavelength of maximum tryptophan emission showed a parallel result, with the three enzymes exhibiting less thermostable activity being grouped together in this regard, and EG II differing from the other three in maintaining a less-exposed tryptophan microenvironment at temperatures as high as 73-degrees-C. The DSC results suggested that at least two transitions are involved in the unfolding of each of the cellulase components, the first (lower-temperature) of which may be the one correlated with activity loss. C1 OAK RIDGE NATL LAB, DIV CHEM TECHNOL, OAK RIDGE, TN 37811 USA. UNIV CALIF DAVIS, DEPT FOOD SCI & TECHNOL, DAVIS, CA 95616 USA. RP BAKER, JO (reprint author), SOLAR ENERGY RES INST, DIV FUELS & CHEM RES & ENGN, BIOTECHNOL RES BRANCH, GOLDEN, CO 80401 USA. NR 35 TC 20 Z9 20 U1 0 U2 6 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 217 EP 231 DI 10.1007/BF02920547 PG 15 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500020 ER PT J AU DUNAHAY, TG JARVIS, EE ZEILER, KG ROESSLER, PG BROWN, LM AF DUNAHAY, TG JARVIS, EE ZEILER, KG ROESSLER, PG BROWN, LM TI GENETIC-ENGINEERING OF MICROALGAE FOR FUEL PRODUCTION - SCIENTIFIC NOTE SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article DE TRANSFORMATION; LUCIFERASE; DNA COMPOSITION; NITRATE REDUCTASE; ACETYL-COA CARBOXYLASE; OROTIDINE-5-PHOSPHATE DECARBOXYLASE; ELECTROPORATION; CHLORELLA-ELLIPSOIDEA; CYCLOTELLA-CRYPTICA; MONORAPHIDIUM-MINUTUM ID DIATOM CYCLOTELLA-CRYPTICA; FIREFLY LUCIFERASE GENE; ESCHERICHIA-COLI; CHLAMYDOMONAS-REINHARDTII; NUCLEAR TRANSFORMATION; SILICON DEFICIENCY; SELECTABLE MARKER; NEUROSPORA-CRASSA; SEQUENCE-ANALYSIS; PLASMID DNA RP NATL RENEWABLE ENERGY LAB, BIOTECHNOL RES BRANCH, 1617 COLE BLVD, GOLDEN, CO 80401 USA. NR 35 TC 14 Z9 15 U1 7 U2 20 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA SN 0273-2289 EI 1559-0291 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 331 EP 339 DI 10.1007/BF02920556 PG 9 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500029 ER PT J AU WOODWARD, J CAPPS, KM AF WOODWARD, J CAPPS, KM TI CELLOBIOSE HYDROLYSIS BY GLUTARALDEHYDE-TREATED BETA-GLUCOSIDASE ENTRAPPED IN PROPYLENE-GLYCOL ALGINATE BONE GELATIN SPHERES - SCIENTIFIC NOTE SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 13TH SYMP ON BIOTECHNOLOGY FOR FUELS AND CHEMICALS CY MAY 06-10, 1991 CL COLORADO SPRINGS, CO SP US DOE, NATL RENEWABLE ENERGY LAB, OAK RIDGE NATL LAB, GAS RES INST, BADGER ENGINEERS, COLORADO INST RES BIOTECHNOL, AMER CHEM SOC DE ASPERGILLUS-NIGER; CELLOBIASE; CELLOBIOSE; GLUTARALDE-HYDE CROSS-LINKING; GEL ENTRAPMENT ID CELLULASE; FUNGAL RP WOODWARD, J (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831, USA. NR 14 TC 7 Z9 7 U1 0 U2 1 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 341 EP 347 DI 10.1007/BF02920557 PG 7 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500030 ER PT J AU DONCHECK, JA HIMMEL, ME AF DONCHECK, JA HIMMEL, ME TI BIOPROCESSING RESEARCH SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Editorial Material C1 SOLAR ENERGY RES INST,GOLDEN,CO 80401. RP DONCHECK, JA (reprint author), BIOTECH RESOURCES,MANITOWOC,WI 54220, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 393 EP 393 DI 10.1007/BF02920563 PG 1 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500036 ER PT J AU BUSCHE, RM SCOTT, CD DAVISON, BH LYND, LR AF BUSCHE, RM SCOTT, CD DAVISON, BH LYND, LR TI ETHANOL, THE ULTIMATE FEEDSTOCK - A TECHNOECONOMIC EVALUATION OF ETHANOL MANUFACTURE IN FLUIDIZED-BED BIOREACTORS OPERATING WITH IMMOBILIZED CELLS SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 13TH SYMP ON BIOTECHNOLOGY FOR FUELS AND CHEMICALS CY MAY 06-10, 1991 CL COLORADO SPRINGS, CO SP US DOE, NATL RENEWABLE ENERGY LAB, OAK RIDGE NATL LAB, GAS RES INST, BADGER ENGINEERS, COLORADO INST RES BIOTECHNOL, AMER CHEM SOC DE ETHANOL; TECHNOECONOMICS; FLUIDIZED BIOREACTOR; IMMOBILIZED CELLS; RENEWABLE BIOMASS ID ZYMOMONAS-MOBILIS; SACCHAROMYCES-CEREVISIAE; FERMENTATION AB Ethanol appears to be a key factor in the "biomass alternative" to fossil feedstocks for producing fuels and chemicals. If produced at a low enough price relative to crude oil, it and its derivates could account for 159 billion pounds, or 50%, of the US production of synthetic organic chemicals, presently valued at $113 billion. This use would consume 4.2 billion bushels, or about 54%, of the corn crop. This study evaluated the potential savings in ethanol manufacture to be gained by applying advanced process engineering or genetic engineering of improved organisms, centering on the use of fluidized bed bioreactors operating at high cell densities with immobilized cells of either the Saccharomyces yeast or the bacterium: Zymomonas mobilis. A new continuous plant could produce at about $1.82/gal based on Zymomonas or $1.97/gal based on the Saccharomyces yeast. The bacterium has a competitive edge as a result of its lower sensitivity to product inhibition. There appears to be no inherent design limitation to effect the engineering improvements required for the advanced process. In a longer-term, more difficult research effort, it might be possible to reduce or, eliminate product inhibition to reduce cost even further. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. DARTMOUTH COLL,HANOVER,NH 03755. RP BUSCHE, RM (reprint author), BIO ENGENEER ASSOCIATES INC,WILMINGTON,DE, USA. RI Lynd, Lee/N-1260-2013; Davison, Brian/D-7617-2013 OI Lynd, Lee/0000-0002-5642-668X; Davison, Brian/0000-0002-7408-3609 NR 51 TC 13 Z9 13 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 395 EP 417 DI 10.1007/BF02920564 PG 23 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500037 ER PT J AU DAVISON, BH THOMPSON, JE AF DAVISON, BH THOMPSON, JE TI SIMULTANEOUS FERMENTATION AND SEPARATION OF LACTIC-ACID IN A BIPARTICLE FLUIDIZED-BED BIOREACTOR SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 13TH SYMP ON BIOTECHNOLOGY FOR FUELS AND CHEMICALS CY MAY 06-10, 1991 CL COLORADO SPRINGS, CO SP US DOE, NATL RENEWABLE ENERGY LAB, OAK RIDGE NATL LAB, GAS RES INST, BADGER ENGINEERS, COLORADO INST RES BIOTECHNOL, AMER CHEM SOC DE FERMENTATION; ADSORPTION; LACTIC ACID; FLUIDIZED BED ID EXTRACTIVE FERMENTATION; ETHANOL-PRODUCTION; ACETONE-BUTANOL; RECOVERY; ADSORPTION AB A bioreactor configuration has been tested for simultaneous fermentation and separation of the desired inhibitory product, lactic acid. The bioreactor is a fluidized bed of immobilized Lactobacillus delbreuckii. Another solid phase of denser sorbent particles (a polyvinyl pyridine resin) was added to this fluidized bed. These sorbent particles fell through the bed, absorbed the product, and were removed. In test fermentations, the addition of the sorbent enhanced the fermentation and moderated the fall of the pH. The biparticle fluidized-bed bioreactor utilizing immobilized microorganisms and adsorbent particles has been shown to enhance the production of lactic acid fourfold in this nonoptimized system. RP DAVISON, BH (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. RI Davison, Brian/D-7617-2013 OI Davison, Brian/0000-0002-7408-3609 NR 21 TC 29 Z9 29 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 431 EP 439 DI 10.1007/BF02920566 PG 9 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500039 ER PT J AU GRABNER, RW SCOTT, CD AF GRABNER, RW SCOTT, CD TI BIOENGINEERING RESEARCH SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Editorial Material C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP GRABNER, RW (reprint author), MONSANTO CO,CHESTERFIELD,MO 63198, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 513 EP 514 DI 10.1007/BF02920574 PG 2 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500047 ER PT J AU PHILIPPIDIS, GP SPINDLER, DD WYMAN, CE AF PHILIPPIDIS, GP SPINDLER, DD WYMAN, CE TI MATHEMATICAL-MODELING OF CELLULOSE CONVERSION TO ETHANOL BY THE SIMULTANEOUS SACCHARIFICATION AND FERMENTATION PROCESS SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 13TH SYMP ON BIOTECHNOLOGY FOR FUELS AND CHEMICALS CY MAY 06-10, 1991 CL COLORADO SPRINGS, CO SP US DOE, NATL RENEWABLE ENERGY LAB, OAK RIDGE NATL LAB, GAS RES INST, BADGER ENGINEERS, COLORADO INST RES BIOTECHNOL, AMER CHEM SOC DE CELLULOSE HYDROLYSIS; SSF MODELING; BIOMASS CONVERSION; ETHANOL PRODUCTION ID ENZYMATIC-HYDROLYSIS; INSOLUBLE CELLULOSE; TRICHODERMA-REESEI; ADSORPTION; KINETICS; INHIBITION; SUBSTRATE; RATES; WOOD AB Ethanol, a promising alternative fuel, can be produced by the simultaneous saccharification and fermentation (SSF) of lignocellulosic biomass, which combines the enzymatic hydrolysis of cellulose to glucose and the fermentation of glucose to ethanol by yeast in a single step. A mathematical model that depicts the kinetics of SSF has been developed based on considerations of the quality of the substrate and enzyme, and the substrate-enzyme-microorganism interactions. Critical experimentation has been performed in conjunction with multiresponse nonlinear regression analysis to determine key model parameters regarding cell growth and ethanol production. The model will be used for rational SSF optimization and scale-up. RP PHILIPPIDIS, GP (reprint author), NATL RENEWABLE ENERGY LAB,DIV FUELS & CHEM RES & ENGN,BIOTECHNOL RES BRANCH,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 39 TC 41 Z9 41 U1 2 U2 7 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 543 EP 556 DI 10.1007/BF02920577 PG 14 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500050 ER PT J AU HINMAN, ND SCHELL, DJ RILEY, CJ BERGERON, PW WALTER, PJ AF HINMAN, ND SCHELL, DJ RILEY, CJ BERGERON, PW WALTER, PJ TI PRELIMINARY ESTIMATE OF THE COST OF ETHANOL-PRODUCTION FOR SSF TECHNOLOGY SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 13TH SYMP ON BIOTECHNOLOGY FOR FUELS AND CHEMICALS CY MAY 06-10, 1991 CL COLORADO SPRINGS, CO SP US DOE, NATL RENEWABLE ENERGY LAB, OAK RIDGE NATL LAB, GAS RES INST, BADGER ENGINEERS, COLORADO INST RES BIOTECHNOL, AMER CHEM SOC DE ETHANOL PRODUCTION COSTS; SIMULTANEOUS SACCHARIFICATION AND FERMENTATION; ETHANOL FROM BIOMASS ID CELLULASE AB The Solar Energy Research Institute (SERI) recently completed a detailed engineering and economic analysis of the simultaneous saccharification and fermentation (SSF) based wood-to-ethanol process. The reference-case design was based on a plant capacity of 1920 dry t/d and a wood cost of $42/dry t. For this case, the preliminary estimate of the production cost of the ethanol product is about $1.22/gal. The combined effects of optimizing SSF enzyme loading, increasing plant capacity to 10,000 dry t/d, and reducing wood cost to $34/dry t are to reduce the preliminary estimate of the production cost to about $0.95/gal. Other technological improvements may further reduce the production cost. Certain technical assumptions, inherent in the analysis, are being investigated further. C1 SOLAR ENERGY RES INST,DIV FUELS & CHEM RES & ENGN,GOLDEN,CO 80401. NR 12 TC 142 Z9 144 U1 0 U2 9 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 639 EP 649 DI 10.1007/BF02920584 PG 11 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500057 ER PT J AU SCHELL, DJ WALTER, PJ JOHNSON, DK AF SCHELL, DJ WALTER, PJ JOHNSON, DK TI DILUTE SULFURIC-ACID PRETREATMENT OF CORN STOVER AT HIGH SOLIDS CONCENTRATIONS - SCIENTIFIC NOTE SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Note ID ENZYMATIC-HYDROLYSIS; ETHANOL; FERMENTATION; SUGARS C1 NATL RENEWABLE ENERGY LAB,DIV FUELS & CHEM RES & ENGN,CHEM CONVERS BRANCH,GOLDEN,CO 80401. RP SCHELL, DJ (reprint author), NATL RENEWABLE ENERGY LAB,DIV FUELS & CHEM RES & ENGN,BIOTECHNOL RES BRANCH,1617 COLE BLVD,GOLDEN,CO 80401, USA. RI Johnson, David/G-4959-2011 OI Johnson, David/0000-0003-4815-8782 NR 11 TC 22 Z9 22 U1 0 U2 4 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 659 EP 665 DI 10.1007/BF02920586 PG 7 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500059 ER PT J AU SRIVASTAVA, VJ BERGERON, PW AF SRIVASTAVA, VJ BERGERON, PW TI BIOTECHNOLOGY, BIOENGINEERING, AND ENVIRONMENTAL-PROBLEMS SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Editorial Material C1 SOLAR ENERGY RES INST,GOLDEN,CO 80401. RP SRIVASTAVA, VJ (reprint author), INST GAS TECHNOL,CHICAGO,IL 60616, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 669 EP 670 DI 10.1007/BF02920587 PG 2 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500060 ER PT J AU RIVARD, CJ ADNEY, WS HIMMEL, ME MITCHELL, DJ VINZANT, TB GROHMANN, K MOENS, L CHUM, H AF RIVARD, CJ ADNEY, WS HIMMEL, ME MITCHELL, DJ VINZANT, TB GROHMANN, K MOENS, L CHUM, H TI EFFECTS OF NATURAL POLYMER ACETYLATION ON THE ANAEROBIC BIOCONVERSION TO METHANE AND CARBON-DIOXIDE SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 13TH SYMP ON BIOTECHNOLOGY FOR FUELS AND CHEMICALS CY MAY 06-10, 1991 CL COLORADO SPRINGS, CO SP US DOE, NATL RENEWABLE ENERGY LAB, OAK RIDGE NATL LAB, GAS RES INST, BADGER ENGINEERS, COLORADO INST RES BIOTECHNOL, AMER CHEM SOC DE ACETYLATION; CELLULOSE; STARCH; XYLAN; ANAEROBIC DIGESTION; XYLANASE AB The successful production of novel biodegradable plastic copolymers incorporating both synthetic plastic formulations, such as polystyrene, and naturally occurring biodegradable polymer components, such as cellulose, starch, or xylan, requires stable chemical bonding between these polymers. Modification of the natural polymers through acetylation of the available hydroxyl groups permits the formation of appropriate film-forming plastic copolymers. However, modification of natural polymers has been demonstrated to result in decreased attack by microbial catalysts. For this study, the abundant natural polymers cellulose, starch, and xylan were substituted with acetate to various degrees, and the effect of this modification on the anaerobic biodegradation was assessed using the biochemical methane potential (BMP) protocol. Significant reduction in anaerobic biodegradability resulted with all polymers at substitution levels of between 1.2-1.7. For the xylan acetate series, the trends for anaerobic biodegradation were in good agreement with reduced enzymatic hydyolysis using commercially available xylanase preparations. C1 NATL RENEWABLE ENERGY LAB,DIV FUELS & CHEM RES & ENGN,CHEM CONVERSION RES BRANCH,GOLDEN,CO 80401. RP RIVARD, CJ (reprint author), NATL RENEWABLE ENERGY LAB,DIV FUELS & CHEM RES & ENGN,BIOTECHNOL RES BRAN,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 22 TC 31 Z9 31 U1 1 U2 3 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 725 EP 736 DI 10.1007/BF02920592 PG 12 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500065 ER PT J AU NAGLE, NJ RIVARD, CJ ADNEY, WS HIMMEL, ME AF NAGLE, NJ RIVARD, CJ ADNEY, WS HIMMEL, ME TI EFFICACY OF HYDROLYTIC ENZYME AUGMENTATION AND THERMOCHEMICAL PRETREATMENTS FOR INCREASED SECONDARY ANAEROBIC-DIGESTION OF TREATED MUNICIPAL SEWAGE SLUDGES SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 13TH SYMP ON BIOTECHNOLOGY FOR FUELS AND CHEMICALS CY MAY 06-10, 1991 CL COLORADO SPRINGS, CO SP US DOE, NATL RENEWABLE ENERGY LAB, OAK RIDGE NATL LAB, GAS RES INST, BADGER ENGINEERS, COLORADO INST RES BIOTECHNOL, AMER CHEM SOC DE SEWAGE SLUDGE; PRETREATMENT; THERMOCHEMICAL; ENZYME; ANAEROBIC DIGESTION; CSTR; HIGH SOLIDS; BMP AB Rising costs for landfill disposal of municipal sewage residues have prompted evaluation of alternative methods for reducing the bulk of the final waste. Representative samples of municipal sewage sludge residues were obtained from three major treatment plants in the United States, including Los Angeles (Hyperion), Denver (North Metro), and Chicago (Stickney). The majority of the treated, de-watered sewage sludge solids was found to be volatile (50-60%) and, presumably, biodegradable. Additionally, much of the volatile content was solubilized by both acid detergent fiber and neutral detergent fiber treatments, and was presumed to be proteineous microbial biomass in nature. Both low- and high-solids anaerobic digester systems, as well as the standard biochemical methane potential (BMP) assay, were utilized to evaluate the anaerobic digestibility of these sewage sludge residues. The low methane yields and, thus, the poor organic waste conversion indicated the need for treatment prior to bioconversion. The effectivenesss of various pretreatments based on assessment of increased soluble protein or organics and anaerobic digestibility as determined by the BMP assay was evaluated. RP NAGLE, NJ (reprint author), SOLAR ENERGY RES INST,DIV FUELS & CHEM RES & ENGN,BIOTECHNOL RES BRANCH,GOLDEN,CO 80401, USA. NR 30 TC 7 Z9 7 U1 2 U2 9 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 737 EP 751 DI 10.1007/BF02920593 PG 15 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500066 ER PT J AU BRYANT, PS PETERSEN, JN LEE, JM BROUNS, TM AF BRYANT, PS PETERSEN, JN LEE, JM BROUNS, TM TI SORPTION OF HEAVY-METALS BY UNTREATED RED FIR SAWDUST SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 13TH SYMP ON BIOTECHNOLOGY FOR FUELS AND CHEMICALS CY MAY 06-10, 1991 CL COLORADO SPRINGS, CO SP US DOE, NATL RENEWABLE ENERGY LAB, OAK RIDGE NATL LAB, GAS RES INST, BADGER ENGINEERS, COLORADO INST RES BIOTECHNOL, AMER CHEM SOC DE SAWDUST; WOOD; ADSORPTION; HEAVY METALS ID BINDING; IONS AB Equilibrium and rate relationships have been determined for the sorption of divalent copper (Cu2+) and hexavalent chromium (Cr6+) onto untreated Red Fir sawdust. For both ions, the equilibrium sorption levels were determined to be a function of the solution pH and temperature. The equilibrium adsorption capacity of the sawdust for Cu2+ was found to increase with increasing pH. However, for Cr6+ the sorption capacity increased with decreasing pH. For both ions, the rate of adsorption and the equilibrium adsorption capacity increased with temperature. The sorption capacity of alpha-cellulose was at least an order of magnitude less than the untreated sawdust. C1 WASHINGTON STATE UNIV, DEPT CHEM ENGN, PULLMAN, WA 99164 USA. PACIFIC NW LAB, DEPT WASTE TREATMENT, RICHLAND, WA 99352 USA. RI Petersen, James/B-8924-2008; OI Bryant, Patrick/0000-0003-3537-3934 NR 23 TC 44 Z9 46 U1 0 U2 4 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 777 EP 788 DI 10.1007/BF02920596 PG 12 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500069 ER PT J AU WOODWARD, CA MACINNIS, JM LEWIS, SN GREENBAUM, E AF WOODWARD, CA MACINNIS, JM LEWIS, SN GREENBAUM, E TI CHEMICAL INTERACTION OF FLUE-GAS COMPONENTS WITH THE GROWTH OF CYANIDIUM-CALDARIUM - SCIENTIFIC NOTE SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Note C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,POB 2008,OAK RIDGE,TN 37831. NR 5 TC 2 Z9 2 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP 819 EP 826 DI 10.1007/BF02920600 PG 8 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500073 ER PT J AU WYMAN, CE WOODWARD, J AF WYMAN, CE WOODWARD, J TI INTRODUCTION TO THE PROCEEDINGS OF THE 13TH SYMPOSIUM ON BIOTECHNOLOGY FOR FUELS AND CHEMICALS SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Editorial Material C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP WYMAN, CE (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. NR 12 TC 0 Z9 0 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1992 VL 34-5 BP R3 EP R4 DI 10.1007/BF02920528 PG 2 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA HU375 UT WOS:A1992HU37500001 ER PT J AU CERRE, N DEFORNEL, F GOUDONNET, JP AF CERRE, N DEFORNEL, F GOUDONNET, JP TI REFLECTION SCANNING MICROSCOPY SO APPLIED OPTICS LA English DT Article ID OPTICAL MICROSCOPY AB To image nontransparent samples we have utilized a special type of scanning-probe microscope that is referred to here as a reflection scanning microscope. The reflection scanning microscope provides a method for producing a scanned point light source as well as a system for collecting the light that is reflected by the sample. The system, which uses an optical fiber coupler, is easily installed on an existing photon scanning tunneling microscope. A calculation of the coupling coefficient between the natural propagation mode of the optical fiber and the light that is reflected by the sample is presented along with a comparison between calculated and measured values of the intensity of the light that is detected. Several images of different samples are presented that show the actual resolution of the microscope. C1 OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,OAK RIDGE,TN 37831. RP CERRE, N (reprint author), UNIV BOURGOGNE,FAC SCI MIRANDE,SOLIDE LAB,PHOTOELECT GRP,BP 138,F-21004 DIJON,FRANCE. NR 12 TC 19 Z9 19 U1 0 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD MAR 1 PY 1992 VL 31 IS 7 BP 903 EP 908 PG 6 WC Optics SC Optics GA HE657 UT WOS:A1992HE65700008 PM 20720699 ER PT J AU CARROLL, MK MILLER, RM KELLER, RA HIEFTJE, GM AF CARROLL, MK MILLER, RM KELLER, RA HIEFTJE, GM TI ON THE FEASIBILITY OF PASSIVE OPTICAL-SEPARATION OF SCATTER AND FLUORESCENCE SO APPLIED SPECTROSCOPY LA English DT Article DE PASSIVE OPTICAL TIME RESOLUTION; FRESNEL LENSES; HOLOGRAPHIC OPTICAL ELEMENTS; INSTRUMENTATION, TIME-RESOLVED FLUORESCENCE; INSTRUMENTATION; SCATTERING ID RAMAN-SPECTROSCOPY; SUPPRESSION; ELIMINATION; SPECTRA; TIME AB The use of "flat" focusing devices, such as Fresnel lenses and holographic optical elements, for the passive optical separation of fluorescence and scattered light is evaluated theoretically and experimentally. Although "flat" lenses do not focus incident light isochronically, and should therefore have different spatial focusing characteristics for very short pulses (scattered light) and pseudo-continuous-wave signals (fluorescence), the optical quality of the flat lenses tested is insufficient to achieve such discrimination. Additionally, if the coherence length of the fluorescence is less than the difference in optical pathlength from extreme positions on the flat lens, fluorescence cannot be considered to be a pseudo-cw signal; this limitation constrains the potential applications of such instrumentation. C1 INDIANA UNIV,DEPT CHEM,BLOOMINGTON,IN 47405. UNILEVER RES,PORT SUNLIGHT LAB,MERSEYSIDE L63 3JW,ENGLAND. UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. NR 17 TC 1 Z9 1 U1 2 U2 6 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA 201B BROADWAY ST, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD MAR PY 1992 VL 46 IS 3 BP 442 EP 447 DI 10.1366/0003702924125302 PG 6 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA HK265 UT WOS:A1992HK26500007 ER PT J AU KE, HYD BIRNBAUM, ER DARNALL, DW JACKSON, PJ RAYSON, GD AF KE, HYD BIRNBAUM, ER DARNALL, DW JACKSON, PJ RAYSON, GD TI INVESTIGATION OF EU(III) BINDING-SITES ON DATURA-INNOXIA USING EU(III) LUMINESCENCE SO APPLIED SPECTROSCOPY LA English DT Article DE LASER-INDUCED FLUORESCENCE SPECTROSCOPY; EU(III) LUMINESCENCE; EXCITATION SPECTRUM; FLUORESCENCE LIFETIME; LUMINESCENCE SPECTRAL ANALYSIS; BIOMASS MATERIAL ID 7F0->-5D0 TRANSITION FREQUENCY; NUCLEAR-MAGNETIC-RESONANCE; STICHOCOCCUS-BACILLARIS; QUANTITATIVE CORRELATION; EXCITATION SPECTROSCOPY; EUROPIUM(III) COMPLEXES; TOTAL CHARGE; ION BINDING; CADMIUM; ONCOMODULIN AB A pulsed tunable dye laser has been used to obtain excitation spectra and fluorescence decay curves of solid Eu(III)-Datura innoxia and from a series of Eu(III)-containing complexes. Carboxyl and sulfate groups have been demonstrated to be the dominant functional groups for forming binding sites on the cell wall of Datura innoxia at high (greater-than-or-equal-to 4) and low (less-than-or-equal-to 3) pH conditions, respectively. The excitation spectra associated with the 7F0 --> 5D0 electronic transition of Eu(III) luminescence have been used to provide a measure of the electronic structure factors contributing to the interaction between Eu(III) ions and the binding sites on the cell wall of D. innoxia. The noticeably broadened and asymmetric excitation spectra obtained at high pH conditions are ascribed to multiple binding sites. The corresponding lifetime decay curves exhibited a bi-exponential decay. A pK of 4.5 was determined for the binding of Eu(III) to the cell wall at pH greater-than-or-equal-to 4. Kinetic and thermodynamic studies were also undertaken. C1 NEW MEXICO STATE UNIV,DEPT CHEM,LAS CRUCES,NM 88003. UNIV CALIF LOS ALAMOS SCI LAB,DIV LIFE SCI LS3,LOS ALAMOS,NM 87545. NR 37 TC 30 Z9 30 U1 0 U2 0 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA 201B BROADWAY ST, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD MAR PY 1992 VL 46 IS 3 BP 479 EP 488 DI 10.1366/0003702924125258 PG 10 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA HK265 UT WOS:A1992HK26500014 ER PT J AU DAI, S YOUNG, JP MAMANTOV, G WANG, JT WILLIAMS, F AF DAI, S YOUNG, JP MAMANTOV, G WANG, JT WILLIAMS, F TI MEASUREMENT OF RADICAL CATION UV-VISIBLE SPECTRUM IN A POLYCRYSTALLINE FREON MATRIX AT LIQUID-NITROGEN TEMPERATURE BY DIFFUSE REFLECTANCE SPECTROSCOPY SO APPLIED SPECTROSCOPY LA English DT Note DE RADICAL CATION; OPTICAL SPECTRA; REFLECTANCE SPECTRA; LOW TEMPERATURE C1 OAK RIDGE NATL LAB,DIV ANALYT CHEM,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. RI Dai, Sheng/K-8411-2015 OI Dai, Sheng/0000-0002-8046-3931 NR 12 TC 0 Z9 0 U1 0 U2 1 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA 201B BROADWAY ST, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD MAR PY 1992 VL 46 IS 3 BP 545 EP 546 DI 10.1366/0003702924125357 PG 2 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA HK265 UT WOS:A1992HK26500025 ER PT J AU CRAIN, JS GALLIMORE, DL AF CRAIN, JS GALLIMORE, DL TI INDUCTIVELY COUPLED PLASMA-MASS SPECTROMETRY OF SYNTHETIC ELEMENTS - TC-99 SO APPLIED SPECTROSCOPY LA English DT Note DE ANALYSIS FOR TC-99; INSTRUMENTATION; ICP-MS; MASS SPECTROSCOPY; SPECTRAL FEATURES; SPECTROSCOPIC TECHNIQUES RP CRAIN, JS (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,DIV CHEM & LASER SCI,ANALYT CHEM GRP,POB 1663,MAIL STOP G740,LOS ALAMOS,NM 87545, USA. NR 7 TC 19 Z9 19 U1 0 U2 1 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA 201B BROADWAY ST, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD MAR PY 1992 VL 46 IS 3 BP 547 EP 549 DI 10.1366/0003702924125384 PG 3 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA HK265 UT WOS:A1992HK26500026 ER PT J AU WILLIAMS, PT KRAUSS, RM VRANIZAN, KM STEFANICK, ML WOOD, PDS LINDGREN, FT AF WILLIAMS, PT KRAUSS, RM VRANIZAN, KM STEFANICK, ML WOOD, PDS LINDGREN, FT TI ASSOCIATIONS OF LIPOPROTEINS AND APOLIPOPROTEINS WITH GRADIENT GEL-ELECTROPHORESIS ESTIMATES OF HIGH-DENSITY-LIPOPROTEIN SUBFRACTIONS IN MEN AND WOMEN SO ARTERIOSCLEROSIS AND THROMBOSIS LA English DT Article DE GRADIENT GEL ELECTROPHORESIS; VERY LOW DENSITY LIPOPROTEINS; LOW DENSITY LIPOPROTEINS; HIGH DENSITY LIPOPROTEINS; SEX DIFFERENCES ID CORONARY-ARTERY DISEASE; PARTICLE-SIZE DISTRIBUTION; MYOCARDIAL-INFARCTION; SERUM-CHOLESTEROL; SUBCLASS PATTERNS; HEART-DISEASE; PLASMA; RISK; PRECIPITATION; QUANTITATION AB We examined the relations of gender and lipoproteins to subclasses of high density lipoproteins (HDLs) in a cross-sectional sample of moderately overweight men (n = 116) and women (n = 78). The absorbance of protein-stained polyacrylamide gradient gels was used as an index of mass concentrations of HDL at intervals of 0.01 nm across the entire HDL particle size range (7.2-12 nm). At least five HDL subclasses have been identified by their particle sizes: HDL3c (7.2-7.8 nm), HDL3b (7.8-8.2 nm), HDL3a (8.2-8.8 nm), HDL2a (8.8-9.7 nm), and HDL2b (9.7-12 nm). Men had significantly higher HDL3b and significantly lower HDL2a and HDL2b than did women. Correlations of HDL subclasses with concentrations of other lipoprotein variables were generally as strong for gradient gel electrophoresis as for analytical ultracentrifugation measurements of HDL particle distributions. In both sexes, high levels of HDL3b were associated with coronary heart disease risk factors, including high concentrations of triglycerides, apolipoprotein B, small low density lipoproteins, intermediate density lipoproteins, and very low density lipoproteins and low concentrations of HDL2 cholesterol and HDL2 mass. Plasma concentrations of HDL3 cholesterol were unrelated to protein-stained HDL3b levels. HDL3 cholesterol concentrations also did not exhibit the sex difference or the relations with lipoprotein concentrations that characterized HDL3b. Thus, low HDL3b levels may contribute in part to the low heart disease risk in men and women who have high HDL cholesterol. Measurements of HDL3 cholesterol may not identify clinically important relations involving HDL3b. C1 STANFORD UNIV,MED CTR,STANFORD CTR RES DIS PREVENT,STANFORD,CA 94305. RP WILLIAMS, PT (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV RES MED & RADIAT BIOPHYS,BLDG 934,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. FU NHLBI NIH HHS [HL-18574]; NICHD NIH HHS [HD-02183, HD-24462] NR 37 TC 77 Z9 78 U1 0 U2 2 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 1049-8834 J9 ARTERIOSCLER THROMB JI Arterioscler. Thromb. PD MAR PY 1992 VL 12 IS 3 BP 332 EP 340 PG 9 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA HJ916 UT WOS:A1992HJ91600010 PM 1547192 ER PT J AU VANBREUGEL, WJM FANTI, C FANTI, R STANGHELLINI, C SCHILIZZI, RT SPENCER, RE AF VANBREUGEL, WJM FANTI, C FANTI, R STANGHELLINI, C SCHILIZZI, RT SPENCER, RE TI COMPACT STEEP-SPECTRUM 3-CR SOURCES - VLA OBSERVATIONS AT 1.5, 15 AND 22.5 GHZ SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE RADIO CONTINUUM, GALAXIES; QUASARS, GENERAL; GALAXIES, JETS; TECHNIQUES, INTERFEROMETRIC ID RADIO-SOURCES; GALAXIES; MERLIN; SCALE; CORES; VLBI AB We present observations of a sample of Compact Steep-Spectrum Sources (CSS) from the 3 CR catalogue, made with the Very Large Array at the frequencies of 1.5, 15 and 22.5 GHz, and with angular resolutions ranging from 0.08 to 4 arcsec. We also present 8.4 GHz observations of 3C 286 and 3C 305.1. Large-scale structure has only been detected in the vicinity of 3C 216, 3C 299, 3C 346 and 3C 380. The low resolution 1.5 GHz data allow stringent upper limits to be set to any large scale (tens of kiloparsecs) low brightness emission in the remaining sources. The observations at the higher frequencies provide maps with the best resolution which can be achieved with the VLA (0.08-0.15 arcsec), and give additional spectral and polarization information. C1 CNR, IST RADIOASTRON, VIA IRNERIO 46, I-40126 BOLOGNA, ITALY. UNIV CALIF LAWRENCE LIVERMORE NATL LAB, INST GEOPHYS & PLANETARY PHYS, LIVERMORE, CA 94550 USA. DIPARTIMENTO ASTRON, I-40126 BOLOGNA, ITALY. NETHERLANDS FDN RES ASTRON RADIOSTERRENWACHT DWING, 7990 AA DWINGELOO, NETHERLANDS. UNIV MANCHESTER, NUFFIELD RADIO ASTRON LABS, MACCLESFIELD SK11 9L, CHESHIRE, ENGLAND. NR 30 TC 77 Z9 78 U1 0 U2 0 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAR PY 1992 VL 256 IS 1 BP 56 EP 78 PG 23 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HH020 UT WOS:A1992HH02000012 ER PT J AU CLINE, DB GAO, YT AF CLINE, DB GAO, YT TI COSMOLOGICAL GAMMA-RAYS FROM THE DECAY OF 4TH FAMILY NEUTRINOS - POSSIBILITY AND CONSTRAINTS SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE COSMOLOGY; ELEMENTARY PARTICLES; GAMMA-RAYS, GENERAL; OBSERVATIONAL METHODS; RADIATION MECHANISMS, GENERAL ID UNSTABLE NEUTRINOS; BACKGROUND-RADIATION; RELIC PARTICLES; NUMBER; UNIVERSE; MASSES; Z0; WIDTH; LEP AB A fourth-family neutrino, nu(4), when sufficiently massive, is allowed by the LEP/SLC results. We find that the nu(4) radiative decay in the early Universe may yield a bump or spike in the spectrum of the extragalactic gamma-ray background, around 10-10(2) MeV. From the existing data, we estimate, with large uncertainties, loose constraints on the nu(4) properties, which may of some value for the future observations. The spike/bump feature, if observed with the new generation of gamma-ray telescopes, would strongly support the existence of the fourth generation of neutrinos. C1 UNIV CALIF LOS ANGELES, DEPT PHYS, LOS ANGELES, CA 90024 USA. FERMI NATL ACCELERATOR LAB, BATAVIA, IL 60510 USA. UNIV MICHIGAN, DEPT PHYS, ANN ARBOR, MI 48109 USA. RP CLINE, DB (reprint author), UNIV CALIF LOS ANGELES, DEPT CHEM ENGN, LOS ANGELES, CA 90024 USA. NR 36 TC 3 Z9 3 U1 0 U2 1 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAR PY 1992 VL 256 IS 2 BP 351 EP 353 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HL037 UT WOS:A1992HL03700008 ER PT J AU KENT, SM AF KENT, SM TI GALACTIC STRUCTURE FROM THE SPACELAB INFRARED TELESCOPE .3. A DYNAMIC-MODEL FOR THE MILKY-WAY BULGE SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXY KINEMATICS AND DYNAMICS ID MASSIVE BLACK-HOLE; SPIRAL GALAXIES; SPHERICAL GALAXIES; ELLIPTIC GALAXIES; ROTATION CURVE; NUCLEAR BULGE; DARK-MATTER; M GIANTS; KINEMATICS; DISK AB The Milky Way bulge is modeled as an oblate isotropic rotator with constant M/L ratio. A model with M/L2.2-mu-m) = 1 successfully reproduces a variety of stellar velocity dispersion measurements for 2 < R < 1200 pc. An observed increase in the stellar velocity dispersion inside 2 pc requires either that there be an additional central mass of order 3 x 10(6) M. or that the stellar motions become anisotropic there. The model has insufficient mass to reproduce the observed peak in the H I and CO rotation curve of 250 km s-1 at 300 pc; it is argued that the peak arises from noncircular gas motions and does not reflect the true mass of the bulge. C1 FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. RP KENT, SM (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,MAIL STOP 20,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 64 TC 193 Z9 193 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 1 PY 1992 VL 387 IS 1 BP 181 EP 188 DI 10.1086/171070 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HF369 UT WOS:A1992HF36900016 ER PT J AU EPSTEIN, RI BAYM, G AF EPSTEIN, RI BAYM, G TI VORTEX DRAG AND THE SPIN-UP TIME SCALE FOR PULSAR GLITCHES SO ASTROPHYSICAL JOURNAL LA English DT Article DE STARS NEUTRON; STARS PULSARS GENERAL ID ROTATING SUPERFLUIDS; NEUTRON STARS; TEMPERATURE; HYDRODYNAMICS AB We investigate the coupling of the superfluid of a neutron star with the solid crust arising from the scattering of individual nuclei in the inner crust with dynamical vortex lines of the superfluid. Such interactions generate quantized Kelvin mode vortex oscillations (kelvons). We calculate the rate of kelvon production and the consequent drag produced on the superfluid. The coupling is sufficiently strong to permit glitch spin-up time scales less-than-or-similar-to 60 times the rotation period. Catastrophic vortex-unpinning events are therefore capable of producing giant glitches with rapid spin-ups on the scale observed in the Vela pulsar. C1 UNIV ILLINOIS,LOOMIS LAB PHYS,URBANA,IL 61801. RP EPSTEIN, RI (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,MS D436,LOS ALAMOS,NM 87545, USA. NR 27 TC 87 Z9 87 U1 1 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 1 PY 1992 VL 387 IS 1 BP 276 EP 287 DI 10.1086/171079 PN 1 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HF369 UT WOS:A1992HF36900025 ER PT J AU KETO, E BALL, R ARENS, J JERNIGAN, G MEIXNER, M AF KETO, E BALL, R ARENS, J JERNIGAN, G MEIXNER, M TI MIDINFRARED IMAGING OF MARKARIAN-231 AND ARP-220 SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, NUCLEI ID BRIGHT GALAXY SAMPLE; CO EMISSION; RESOLUTION AB High angular resolution observations of Arp 220 and Mrk 231 provide images of the nuclei and show that the source of the strong mid-IR emission is confined to regions less than about 0".5 or 400 pc in diameter in Mrk 231 and less than 1".5 x 0".9 or 320 x 530 pc in Arp 220. If much of the far-IR emission also derives from such a small region, the implied radiation densities are quite high, equivalent to one O star pc-3. Although in normal galaxies the near-IR traces an older population of evolved, cool stars, such high radiation densities in the IR bright galaxies suggest the possibility that the spatial correlation observed between the near-IR, mid-IR, and radio may hold because emission in all three bands is associated with hot interstellar gas and dust. C1 UNIV HAWAII,NASA,INFRARED TELESCOPE FACIL,HONOLULU,HI 96822. UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA 94550. RP KETO, E (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 23 TC 15 Z9 15 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 1 PY 1992 VL 387 IS 1 BP L17 EP L19 DI 10.1086/186295 PN 2 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HF370 UT WOS:A1992HF37000004 ER PT J AU SCOTT, BC LUECKEN, DJ AF SCOTT, BC LUECKEN, DJ TI THE SENSITIVITY OF MODELED SULFATE WET DEPOSITION TO THE METEOROLOGICAL VALUES USED AS INPUT SO ATMOSPHERIC ENVIRONMENT PART A-GENERAL TOPICS LA English DT Article DE PRECIPITATION SCAVENGING; ACID DEPOSITION; MODELING ID CHEMISTRY MODEL; FORMULATION AB Variations in the wet deposition of sulfate, resulting from uncertainties in key meteorological variables, have been calculated using a scavenging model with a steady-state meteorology and a time-dependent, non-linear chemical mechanism. Input data to initialize this model are representative of data measured during an actual storm event. The results are presented in terms of the deposition uncertainty that would result if the maximum prescribed uncertainty occurred simultaneously in all input meteorological variables. For stratiform clouds, sulfate deposition uncertainties of up to 33% of the computed value were calculated. For convective clouds, the sulfate deposition uncertainties ranged from near 30% at low grid-averaged precipitation rates to near 60% at higher precipitation rates. The largest contributor to deposition uncertainty was the area of convective cloud coverage. For a mixed convective-stratiform cloud system, uncertainties in deposition remained below 40% as long as the convective contribution to total precipitation was less than 75% of the total rainfall amount. In the mixed convective-stratiform system, the uncertainties in deposition were associated principally with uncertain areas of cloud coverage and uncertain precipitation contributions by each cloud type. Uncertainties in precipitation rate, cloud top height, and cloud base height were of secondary importance for the mixed cloud system and contributed roughly equally to the remaining deposition uncertainty. In all simulations, uncertainties calculated as the standard deviation from the known value are about half of the maximum value. RP SCOTT, BC (reprint author), PACIFIC NW LAB, DEPT ATMOSPHER SCI, POB 999, RICHLAND, WA 99352 USA. NR 16 TC 4 Z9 4 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0004-6981 J9 ATMOS ENVIRON A-GEN PD MAR PY 1992 VL 26 IS 4 BP 559 EP 569 DI 10.1016/0960-1686(92)90169-L PG 11 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA HD029 UT WOS:A1992HD02900005 ER PT J AU VOGT, R AF VOGT, R TI RATE ESTIMATES FOR VECTOR-MESON AND DRELL-YAN PAIR PRODUCTION IN RELATIVISTIC HEAVY-ION COLLISIONS SO ATOMIC DATA AND NUCLEAR DATA TABLES LA English DT Article ID NUCLEUS-NUCLEUS COLLISIONS; J-PSI-SUPPRESSION; QUARK-GLUON PLASMA; MOMENTUM DISTRIBUTION; HADRONIC PRODUCTION; DIMUON PRODUCTION; J/PSI-PRODUCTION; MUON PAIRS; DEPENDENCE; HADROPRODUCTION RP UNIV CALIF LAWRENCE LIVERMORE NATL LAB, POB 808, LIVERMORE, CA 94550 USA. NR 37 TC 13 Z9 13 U1 0 U2 0 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0092-640X EI 1090-2090 J9 ATOM DATA NUCL DATA JI Atom. Data Nucl. Data Tables PD MAR PY 1992 VL 50 IS 2 BP 343 EP 363 DI 10.1016/0092-640X(92)90038-J PG 21 WC Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Physics GA HK269 UT WOS:A1992HK26900003 ER PT J AU CHRISTOPHOROU, LG DATSKOS, PG CARTER, JG AF CHRISTOPHOROU, LG DATSKOS, PG CARTER, JG TI EFFECT OF TEMPERATURE ON THE DISSOCIATIVE AND NONDISSOCIATIVE ELECTRON-ATTACHMENT TO FREONS SO BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article; Proceedings Paper CT DISCUSSION MEETING ON PHYSICS AND CHEMISTRY OF THE ATMOSPHERE CY OCT 07-09, 1991 CL SCHLIERSEE, GERMANY SP DEUT BUNSEN GESELL PHYS CHEM DE ELECTROCHEMISTRY; ELEMENTARY REACTIONS; GASES; MASS SPECTROMETRY; RADIATION CHEMISTRY AB The attachment of slow electrons to freons (including many atmospheric halocarbons) depends rather strongly on the gas temperature. In general, as the temperature increases, dissociative electron attachment increases and nondissociative electron attachment decreases; the former behavior is principally due to increase in autodissociation and the latter principally due to increase in autodetachment of the transient anion. C1 OAK RIDGE NATL LAB,ATOM MOLEC & HIGH VOLTAGE PHYS GRP HLTH,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,DIV SAFETY RES,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. NR 3 TC 4 Z9 4 U1 1 U2 1 PU VCH PUBLISHERS INC PI DEERFIELD BEACH PA 303 NW 12TH AVE, DEERFIELD BEACH, FL 33442-1788 SN 0005-9021 J9 BER BUNSEN PHYS CHEM JI Ber. Bunsen-Ges. Phys. Chem. Chem. Phys. PD MAR PY 1992 VL 96 IS 3 BP 448 EP 450 PG 3 WC Chemistry, Physical SC Chemistry GA HR523 UT WOS:A1992HR52300041 ER PT J AU Kong, S Johnstone, DL Yonge, DR Petersen, JN Brouns, TM AF Kong, Sungho Johnstone, Donald L. Yonge, David R. Petersen, James N. Brouns, Thomas M. TI COMPARISON OF CHROMIUM ADSORPTION TO STARVED AND FRESH SUBSURFACE BACTERIAL CONSORTIUM SO BIOTECHNOLOGY TECHNIQUES LA English DT Article AB The adsorption of chromium (Cr+6) to a denitrifying consortium was investigated for starved and fresh cells under three pH values (pH 6.0, 7.5 and 9.0). Cells starved 50 days adsorbed approximately 10-15% more Cr+6 than fresh (0 day) cells at those three pH conditions. C1 [Kong, Sungho; Johnstone, Donald L.; Yonge, David R.] Washington State Univ, Dept Civil & Environm Engn, Pullman, WA 99164 USA. [Petersen, James N.] Washington State Univ, Dept Chem Engn, Pullman, WA 99164 USA. [Brouns, Thomas M.] Battelle Pacific NW Labs, Richland, WA 99352 USA. RP Johnstone, DL (reprint author), Washington State Univ, Dept Civil & Environm Engn, Pullman, WA 99164 USA. FU Battelle Pacific Northwest Laboratories, Richland, WA FX This work was supported by Battelle Pacific Northwest Laboratories, Richland, WA. NR 16 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0951-208X J9 BIOTECHNOL TECH JI Biotechnol. Tech. PD MAR PY 1992 VL 6 IS 2 BP 143 EP 148 PG 6 WC Biochemical Research Methods; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA V03YU UT WOS:000207026900010 ER PT J AU WAUGH, RE NARLA, M JACKSON, CW MUELLER, TJ SUZUKI, T DALE, GL AF WAUGH, RE NARLA, M JACKSON, CW MUELLER, TJ SUZUKI, T DALE, GL TI RHEOLOGIC PROPERTIES OF SENESCENT ERYTHROCYTES - LOSS OF SURFACE-AREA AND VOLUME WITH RED-BLOOD-CELL AGE SO BLOOD LA English DT Article ID REFLECT SPECTRIN DEFICIENCIES; HEREDITARY SPHEROCYTOSIS; SICKLE ERYTHROCYTES; MEMBRANE; INVIVO; ANEMIA C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV CELL & MOLEC BIOL, BERKELEY, CA 94720 USA. ST JUDE CHILDRENS RES HOSP, DEPT HEMATOL ONCOL, MEMPHIS, TN 38101 USA. ST JUDE CHILDRENS RES HOSP, DEPT BIOCHEM, MEMPHIS, TN 38101 USA. Scripps Res Inst, RES INST, DEPT MOLEC & EXPTL MED, LA JOLLA, CA 92037 USA. RP WAUGH, RE (reprint author), UNIV ROCHESTER, SCH MED & DENT, DEPT PHYSIOL & BIOPHYS, 601 ELMWOOD AVE, ROCHESTER, NY 14642 USA. FU NHLBI NIH HHS [HL18208]; NIA NIH HHS [AG08545]; NIDDK NIH HHS [DK26263] NR 36 TC 139 Z9 145 U1 2 U2 7 PU AMER SOC HEMATOLOGY PI WASHINGTON PA 2021 L ST NW, SUITE 900, WASHINGTON, DC 20036 USA SN 0006-4971 EI 1528-0020 J9 BLOOD JI Blood PD MAR 1 PY 1992 VL 79 IS 5 BP 1351 EP 1358 PG 8 WC Hematology SC Hematology GA HF638 UT WOS:A1992HF63800035 PM 1536958 ER PT J AU SCHWARTZMAN, G OPRESKO, DM AF SCHWARTZMAN, G OPRESKO, DM TI INFRARED-SPECTRUM OF THE SKELETAL AXIS OF ANTIPATHARIAN CORALS (CNIDARIA, ANTHOZOA) SO BULLETIN OF MARINE SCIENCE LA English DT Note C1 OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,OAK RIDGE,TN 37831. RP SCHWARTZMAN, G (reprint author), UNIV S FLORIDA,NEW COLL,5700 N TAMIAMI TRAIL,SARASOTA,FL 34233, USA. NR 10 TC 4 Z9 4 U1 0 U2 1 PU ROSENSTIEL SCH MAR ATMOS SCI PI MIAMI PA 4600 RICKENBACKER CAUSEWAY, MIAMI, FL 33149 SN 0007-4977 J9 B MAR SCI JI Bull. Mar. Sci. PD MAR PY 1992 VL 50 IS 2 BP 352 EP 356 PG 5 WC Marine & Freshwater Biology; Oceanography SC Marine & Freshwater Biology; Oceanography GA HV546 UT WOS:A1992HV54600011 ER PT J AU HILL, WR BOSTON, HL STEINMAN, AD AF HILL, WR BOSTON, HL STEINMAN, AD TI GRAZERS AND NUTRIENTS SIMULTANEOUSLY LIMIT LOTIC PRIMARY PRODUCTIVITY SO CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES LA English DT Article ID PERIPHYTON RESPONSES; CADDISFLY POPULATION; NITROGEN LIMITATION; WOODLAND STREAM; ALGAE; GROWTH; PHOSPHORUS; PHOTOSYNTHESIS; PHYTOPLANKTON; COMMUNITIES AB Nitrate and phosphate were added to two of four flow through channels in a second-order stream in eastern Tennessee to raise nutrient concentrations to 3-4 times background, while two of four sets of colonized ceramic tiles in each channel were raised above the substratum to exclude grazing snails (Elimia clavaeformis). Snail grazing maintained a thin layer of periphyton dominated by Stigeoclonium basal cells, regardless of nutrient regime. Although nutrient effects on periphyton ash-free dry mass were statistically insignificant, nutrient additions significantly increased chlorophyll a, especially where snails were excluded. Snail densities were 89% higher in nutrient-enriched channels. Photosynthesis-irradiance data suggested that nutrient enrichment increased self-shading in the periphyton. Areal-specific productivity was simultaneously limited by grazing and low nutrient concentrations: snail exclusion and nutrient enrichment both increased productivity > 2 times. The negative effect of snails on areal-specific productivity was due to (1) reduction in biomass by cropping and (2) depression of chlorophyll-specific productivity. The means by which Elimia depresses chlorophyll-specific productivity is unclear, but the depression is clearly disadvantageous to food-limited grazers. Because Elimia was the dominant invertebrate, our results indicate that low nutrient concentrations limit secondary as well as primary production in autumn. RP HILL, WR (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,OAK RIDGE,TN 37831, USA. OI Steinman, Alan/0000-0002-4886-4305 NR 65 TC 96 Z9 98 U1 1 U2 29 PU NATL RESEARCH COUNCIL CANADA PI OTTAWA PA RESEARCH JOURNALS, MONTREAL RD, OTTAWA ON K1A 0R6, CANADA SN 0706-652X J9 CAN J FISH AQUAT SCI JI Can. J. Fish. Aquat. Sci. PD MAR PY 1992 VL 49 IS 3 BP 504 EP 512 DI 10.1139/f92-059 PG 9 WC Fisheries; Marine & Freshwater Biology SC Fisheries; Marine & Freshwater Biology GA HJ150 UT WOS:A1992HJ15000010 ER PT J AU BEAUCHAMP, JJ CHRISTENSEN, SW SMITH, EP AF BEAUCHAMP, JJ CHRISTENSEN, SW SMITH, EP TI SELECTION OF FACTORS AFFECTING THE PRESENCE OF BROOK TROUT (SALVELINUS-FONTINALIS) IN ADIRONDACK LAKES - A CASE-STUDY SO CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES LA English DT Article ID FISH SPECIES RICHNESS; LOGISTIC-REGRESSION; ONTARIO LAKES; ACIDIFICATION; DIAGNOSTICS; AREA; PH AB We used multiple logistic regression techniques to develop models for estimating the probability of brook trout (Salvelinus fontinalis) presence/absence as a function of observable water chemistry variables and watershed characteristics. The data set consists of the Adirondack Lakes Survey Corporation data collected on 1469 lakes during 1984-87. Two models fitted to a randomly selected development subset of lakes, using two sets of candidate explanatory/predictor variables of particular interest, were compared on the basis of coefficient consistency and predictive ability. In addition to the usual maximum likelihood logistic regression results, we also applied collinearity and other associated diagnostics and variable-selection procedures designed specifically for the logistic regression model to arrive at parsimonious models. Both models correctly predicted fish presence in more than 85% of the model development set and more than 80% of the lakes in the verification data. For those variables appearing in both models, the signs of the estimated coefficients were the same and in agreement with expectation. The removal of influential observations, as indicated by the logistic regression diagnostics, caused all of the estimated coefficients to increase in absolute magnitude. This results in a model which is more sensitive to changes in the explanatory variables. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,ECOSYST STUDIES SECT,OAK RIDGE,TN 37831. VIRGINIA POLYTECH INST & STATE UNIV,DEPT STAT,BLACKSBURG,VA 24061. RP BEAUCHAMP, JJ (reprint author), OAK RIDGE NATL LAB,DIV ENGN PHYS & MATH,MATH SCI SECT,OAK RIDGE,TN 37831, USA. NR 25 TC 6 Z9 6 U1 0 U2 1 PU NATL RESEARCH COUNCIL CANADA PI OTTAWA PA RESEARCH JOURNALS, MONTREAL RD, OTTAWA ON K1A 0R6, CANADA SN 0706-652X J9 CAN J FISH AQUAT SCI JI Can. J. Fish. Aquat. Sci. PD MAR PY 1992 VL 49 IS 3 BP 597 EP 608 DI 10.1139/f92-069 PG 12 WC Fisheries; Marine & Freshwater Biology SC Fisheries; Marine & Freshwater Biology GA HJ150 UT WOS:A1992HJ15000020 ER PT J AU TUSKAN, GA RENSEMA, TR AF TUSKAN, GA RENSEMA, TR TI CLONAL DIFFERENCES IN BIOMASS CHARACTERISTICS, COPPICE ABILITY, AND BIOMASS PREDICTION EQUATIONS AMONG 4 POPULUS CLONES GROWN IN EASTERN NORTH-DAKOTA SO CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE LA English DT Article ID INTENSIVE CULTURE; ENERGY; SELECTION; REGRESSION; CROPS AB Differences in biomass characteristics and biomass prediction equations were quantified for four hybrid poplar clones: 'Siouxland', 'Robusta', 'Eugenei', and 'Northwest'. Twenty trees per clone were destructively sampled, separated into 'component parts, and compared using analysis of variance and regression techniques. Significant differences in clonal means were detected for all biomass components. The functional relationship, however, between standing-tree measurements and biomass yields did not generally vary among clones. There were differences in regression equation slopes among clones for leaf green weight, limb green weight, and leaf dry weight. These differences appear to be related to the annual infection of the clone 'Northwest' by Melampsora leaf rust. All clones coppiced satisfactorily despite a late summer harvest. Clonal differences did exist in coppice ability and sprout growth vigor. C1 MAINE ARMY NATL GUARD,AUGUSTA,ME 04333. RP TUSKAN, GA (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,BLDG 1503,OAK RIDGE,TN 37831, USA. RI Tuskan, Gerald/A-6225-2011 OI Tuskan, Gerald/0000-0003-0106-1289 NR 34 TC 30 Z9 32 U1 1 U2 7 PU NATL RESEARCH COUNCIL CANADA PI OTTAWA PA RESEARCH JOURNALS, MONTREAL RD, OTTAWA ON K1A 0R6, CANADA SN 0045-5067 J9 CAN J FOREST RES JI Can. J. For. Res.-Rev. Can. Rech. For. PD MAR PY 1992 VL 22 IS 3 BP 348 EP 354 DI 10.1139/x92-045 PG 7 WC Forestry SC Forestry GA JF878 UT WOS:A1992JF87800010 ER PT J AU TJOELKER, MG MCLAUGHLIN, SB DICOSTY, RJ LINDBERG, SE NORBY, RJ AF TJOELKER, MG MCLAUGHLIN, SB DICOSTY, RJ LINDBERG, SE NORBY, RJ TI SEASONAL-VARIATION IN NITRATE REDUCTASE-ACTIVITY IN NEEDLES OF HIGH-ELEVATION RED SPRUCE TREES SO CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE LA English DT Article ID SCOTS PINE-SEEDLINGS; FOREST ECOSYSTEMS; DRY DEPOSITION; AIR-POLLUTION; HNO3 VAPOR; NITROGEN; AMMONIUM; INDUCTION; PLANTS; ASSIMILATION AB To assess seasonal and site variation in foliar nitrate reductase activity and its utility as a biochemical marker for the uptake of nitrogen oxide pollutants in high-elevation forests, we measured nitrate reductase activity in current-year needles of red spruce (Picea rubens Sarg.) saplings at two high-elevation stands (1935 and 1720 m) in the Great Smoky Mountains, North Carolina. Measurements spanned two growing seasons between September 1987 and September 1988. Nitrate reductase activity peaked near 60 nmol . g-1 . h-1 at both sites in September and October 1987 and August 1988 and declined 80% in November 1987 and 65% in September 1988. Although nitrate reductase activity was 30% greater in saplings at the higher site relative to the lower site in September and October 1987, activity dropped to approximately 10 nmol . g-1 . h-1 at both sites in November 1987. No differences among sites were evident the following year. Comparing deposition of nitric acid vapor at a nearby site to nitrate reductase activity suggests that needle nitrate reductase activity is not an unequivocal marker for foliar uptake of nitrogen oxides during air pollutant episodes. The changes in soil nitrate levels in this system provide preliminary evidence that foliar nitrate assimilation may, in part, include nitrate taken up from the soil, as the highest activity occurred during periods of higher A-horizon nitrate concentrations in 1988. These measurements of nitrate reductase activity suggest that red spruce are capable of assimilating nitrate in foliage in the field and that the nitrate assimilation capacity varies throughout the year. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. RI Norby, Richard/C-1773-2012; Tjoelker, Mark/M-2413-2016 OI Norby, Richard/0000-0002-0238-9828; Tjoelker, Mark/0000-0003-4607-5238 NR 38 TC 7 Z9 7 U1 0 U2 1 PU NATL RESEARCH COUNCIL CANADA PI OTTAWA PA RESEARCH JOURNALS, MONTREAL RD, OTTAWA ON K1A 0R6, CANADA SN 0045-5067 J9 CAN J FOREST RES JI Can. J. For. Res.-Rev. Can. Rech. For. PD MAR PY 1992 VL 22 IS 3 BP 375 EP 380 DI 10.1139/x92-049 PG 6 WC Forestry SC Forestry GA JF878 UT WOS:A1992JF87800014 ER PT J AU RAY, FA KRAEMER, PM AF RAY, FA KRAEMER, PM TI FREQUENT DELETIONS IN 9 NEWLY IMMORTAL HUMAN CELL-LINES SO CANCER GENETICS AND CYTOGENETICS LA English DT Article ID HUMAN-DIPLOID FIBROBLASTS; CHINESE-HAMSTER CELLS; MALIGNANT TRANSFORMATION; COLORECTAL CARCINOMAS; DNA; GENE; CHROMOSOME-17; EVOLUTION; ANTIGEN; CANCER AB Nine newly immortal lines of human fibroblasts transfected with SV 40 T antigen were examined for recurrent chromosome losses. In order of decreasing frequency, all nine lines had three or more of the following minimal deletions specifically associated with the immortalization event: del(6)(q21), del(3)(p24), del(1)(p34), del(4)(p25), del(5)(p14), del(11)(p11), del(11)(q14), del(12)(P12), and del(14)(p?). Many other chromosome changes were not clearly associated with immortalization, but were acquired during other stages of this multistep model of neoplastic transformation. We propose that these chromosome loci associated with immortalization are candidates for the location of genes involved in cellular senescence. C1 UNIV CALIF LOS ALAMOS SCI LAB,CELLULAR & MOLEC BIOL GRP,MAIL STOP M888,LOS ALAMOS,NM 87545. NR 35 TC 36 Z9 36 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0165-4608 J9 CANCER GENET CYTOGEN JI Cancer Genet. Cytogenet. PD MAR PY 1992 VL 59 IS 1 BP 39 EP 44 DI 10.1016/0165-4608(92)90155-2 PG 6 WC Oncology; Genetics & Heredity SC Oncology; Genetics & Heredity GA HM018 UT WOS:A1992HM01800008 PM 1313331 ER PT J AU HE, XM OSTROWSKI, LE VONWRONSKI, MA FRIEDMAN, HS WIKSTRAND, CJ BIGNER, SH RASHEED, A BATRA, SK MITRA, S BRENT, TP BIGNER, DD AF HE, XM OSTROWSKI, LE VONWRONSKI, MA FRIEDMAN, HS WIKSTRAND, CJ BIGNER, SH RASHEED, A BATRA, SK MITRA, S BRENT, TP BIGNER, DD TI EXPRESSION OF O6-METHYLGUANINE-DNA METHYLTRANSFERASE IN 6 HUMAN MEDULLOBLASTOMA CELL-LINES SO CANCER RESEARCH LA English DT Article ID MAMMALIAN O-6-ALKYLGUANINE-DNA ALKYLTRANSFERASE; HUMAN-TUMOR-CELLS; O-6-METHYLGUANINE-DNA METHYLTRANSFERASE; ESCHERICHIA-COLI; ALKYLATING-AGENTS; HUMAN-BRAIN; DNA; REPAIR; GENE; CHEMOTHERAPY AB Six well characterized human medulloblastoma cell lines (D283 Med, Daoy, D341 Med, D384 Med, D425 Med, and D458 Med) were examined for the expression of O6-methylguanine-DNA methyltransferase (MGMT) by activity and Western and Northern blot analysis. High levels of MGMT activity were present in D283 Med, Daoy, D341 Med, and D384 Med (1.36, 0.80, 1.68, and 1.62 pmol/mg of protein, respectively), but negligible MGMT activity was detected in D425 Med and D458 Med (0.06 and 0.05 pmol/mg of protein, respectively), which were derived separately at different times from the same patient. The presence of MGMT protein and its transcript was demonstrated in D283 Med, Daoy, D341 Med, and D384 Med, but both the protein and the mRNA were undetectable in D425 Med and D458 Med. Nevertheless, all six cell lines contained an apparently unaltered MGMT gene, as determined by Southern blot analysis. The absence of MGMT activity in D425 Med and D458 Med is likely due to the absence of the protein, resulting from a lack of transcription of the MGMT gene. The varying levels of expression of MGMT in medulloblastoma cells found in this study should provide a molecular basis for drug design and selection in chemotherapy of this tumor. C1 DUKE UNIV, MED CTR, DEPT PEDIAT, DURHAM, NC 27710 USA. DUKE UNIV, MED CTR, PREUSS LAB BRAIN TUMOR RES, DURHAM, NC 27710 USA. ST JUDE CHILDRENS RES HOSP, DEPT BIOCHEM & CLIN PHARMACOL, MEMPHIS, TN 38101 USA. UNIV TENNESSEE, OAK RIDGE GRAD SCH BIOMED SCI, OAK RIDGE, TN 37830 USA. OAK RIDGE NATL LAB, DIV BIOL, OAK RIDGE, TN 37831 USA. RP BIGNER, DD (reprint author), DUKE UNIV, MED CTR, DEPT PATHOL, POB 3156, DURHAM, NC 27710 USA. FU NCI NIH HHS [CA 11898, CA 32672]; NINDS NIH HHS [NS 20023] NR 40 TC 31 Z9 31 U1 0 U2 1 PU AMER ASSOC CANCER RESEARCH PI PHILADELPHIA PA 615 CHESTNUT ST, 17TH FLOOR, PHILADELPHIA, PA 19106-4404 USA SN 0008-5472 J9 CANCER RES JI Cancer Res. PD MAR 1 PY 1992 VL 52 IS 5 BP 1144 EP 1148 PG 5 WC Oncology SC Oncology GA HF637 UT WOS:A1992HF63700014 PM 1737373 ER PT J AU MATTHEWS, DC BADGER, CC FISHER, DR HUI, TE NOURIGAT, C APPELBAUM, FR MARTIN, PJ BERNSTEIN, ID AF MATTHEWS, DC BADGER, CC FISHER, DR HUI, TE NOURIGAT, C APPELBAUM, FR MARTIN, PJ BERNSTEIN, ID TI SELECTIVE RADIATION OF HEMATOLYMPHOID TISSUE DELIVERED BY ANTI-CD45 ANTIBODY SO CANCER RESEARCH LA English DT Article ID MONOCLONAL-ANTIBODY; MURINE LYMPHOMA; RADIOIMMUNOTHERAPY; GLYCOPROTEIN; LOCALIZATION; ANTIGEN; TUMORS; T200 AB The ability to deliver radiation selectively to lymphohematopoietic tissues may have utility in conditions treated by myeloablative regimens followed by bone marrow transplantation. Since the CD45 antigen is the most broadly expressed of hematopoietic antigens, we examined the biodistribution of radiolabeled anti-CD45 monoclonal antibodies in normal mice. Trace I-125 or I-131-labeled monoclonal antibodies 30G12 (rat IgG2a), 30F11 (rat IgG2b), and F(ab')2 fragments of 30F11 were injected i.v. at doses of 5 to 1000-mu-g. For both intact antibodies, a higher percentage of injected dose/g (% ID/g tissue) in blood was achieved with higher antibody doses. However, as the dose of antibody was increased, the % ID/g in the target organs of spleen, marrow, and lymph nodes decreased. At doses between 5 and 10-mu-g, % ID/g in these tissues exceeded that in lung, the normal organ with the highest concentration of radiolabel. In contrast, thymus was the only hematopoietic organ in which the % ID/g increased with increasing antibody dose, although at high dose the % ID/g was still far below that achieved in the other hematopoietic organs. Antibody 30F11 F(ab')2 fragments were cleared more quickly than intact antibody from blood and from both target and nontarget organs, although the relationship between increasing antibody dose and decreasing % ID/g in spleen, marrow, and lymph nodes was observed. The time-activity curves for each dose of antibody were used to calculate estimates of radiation absorbed dose to each organ. At the 10-mu-g dose of 30G12, the spleen was estimated to receive a radiation dose that was 13 times more than lung, the lymph nodes 3 to 4 times more, and the bone marrow 3 times more than lung. For each antibody fragment dose, the radiation absorbed dose per MBq I-131 administered was lower because the residence times of the fragments were shorter than those of the intact antibody. Thus these estimates suggested that the best "therapeutic ratio" of radiation delivered to target organ as compared to lung was achieved with lower doses of intact antibody. We have demonstrated that radiolabeled anti-CD45 monoclonal antibodies can deliver radiation to lymphohematopoietic tissues with relative selectivity and that the relative uptake and retention in different hematolymphoid tissues change with increasing antibody dose. C1 UNIV WASHINGTON, DEPT PEDIAT, SEATTLE, WA 98195 USA. UNIV WASHINGTON, DEPT MED, SEATTLE, WA 98195 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. RP MATTHEWS, DC (reprint author), FRED HUTCHINSON CANC RES CTR, DIV CLIN RES, SEATTLE, WA 98104 USA. FU NCI NIH HHS [CA 26836] NR 19 TC 34 Z9 37 U1 0 U2 0 PU AMER ASSOC CANCER RESEARCH PI PHILADELPHIA PA PUBLIC LEDGER BLDG, SUITE 816, 150 S. INDEPENDENCE MALL W., PHILADELPHIA, PA 19106 SN 0008-5472 J9 CANCER RES JI Cancer Res. PD MAR 1 PY 1992 VL 52 IS 5 BP 1228 EP 1234 PG 7 WC Oncology SC Oncology GA HF637 UT WOS:A1992HF63700029 PM 1531324 ER PT J AU KENNEL, SJ AF KENNEL, SJ TI EFFECTS OF TARGET ANTIGEN COMPETITION ON DISTRIBUTION OF MONOCLONAL-ANTIBODY TO SOLID TUMORS SO CANCER RESEARCH LA English DT Article ID PROTEIN; CANCER; RADIOIMMUNODETECTION; BIODISTRIBUTION; ALPHA-6-BETA-4; LOCALIZATION; XENOGRAFTS; COMPLEXES; KINETICS; F(AB')2 AB Monoclonal antibody (MoAb) 11A and MoAb 13A recognize normal murine cell surface glycoproteins, which are also expressed in high concentrations on Line 1 lung carcinoma. Studies were initiated to examine the competition in vivo for radiolabeled MoAb between sites on the tumor versus sites on normal tissue. Quantitative 2-site assay of the alpha-6-beta-4 integrin recognized by MoAb 11A showed that major sites of expression are tumor, intestine, and skin. Microdistribution studies show that at doses of I-125-labeled MoAb 11A less than the total body antigen load, the MoAb bound to beta-4 endothelial cells with little extravasation to epithelial sites. As the MoAb dose was increased, and endothelial sites became saturated, deposition at epithelial sites including skin and tumor became apparent. Quantitative radioimmunoassay with MoAb 13A, recognizing CD44 (P100), demonstrated major sites of expression as tumor, intestine, liver and, to a lesser extent, spleen and skin. Microdistribution studies at low doses of I-125-labeled MoAb showed deposition mainly in the liver and spleen sinusoids, whereas higher doses were necessary to maximize MoAb accumulation in tumor. The rapid access of MoAb to target antigen is the most important parameter in efficient localization of MoAb. Access of antigen outside the vascular space is regulated at least in part by the permeability of the endothelial barrier. Of the organs studied, antigen accessibility increases in the following order: lung epithelium < skin epithelium < intestine and uterus epithelium < epithelial tumors < liver and spleen sinusoids < intervascular sites. Antigens in easily accessible sites interact with MoAb first and must be saturated before MoAb will penetrate to less accessible areas. Thus, the extent of competition of antigen for available MoAb depends not only on the amount of antigen, but also on the site at which it is expressed. Doses that achieve maximum binding to tumor sites can be predicted if accurate target antigen quantities and sites of expression are known. RP KENNEL, SJ (reprint author), OAK RIDGE NATL LAB,DIV BIOL,POB 2009,OAK RIDGE,TN 37831, USA. NR 32 TC 20 Z9 20 U1 0 U2 0 PU AMER ASSOC CANCER RESEARCH PI PHILADELPHIA PA PUBLIC LEDGER BLDG, SUITE 816, 150 S. INDEPENDENCE MALL W., PHILADELPHIA, PA 19106 SN 0008-5472 J9 CANCER RES JI Cancer Res. PD MAR 1 PY 1992 VL 52 IS 5 BP 1284 EP 1290 PG 7 WC Oncology SC Oncology GA HF637 UT WOS:A1992HF63700037 PM 1737391 ER PT J AU RYDBERG, B QIU, ZH DOSANJH, MK SINGER, B AF RYDBERG, B QIU, ZH DOSANJH, MK SINGER, B TI PARTIAL-PURIFICATION OF A HUMAN DNA GLYCOSYLASE ACTING ON THE CYCLIC CARCINOGEN ADDUCT 1,N6-ETHENODEOXYADENOSINE SO CANCER RESEARCH LA English DT Note ID VINYL-CHLORIDE; CALF THYMUS; GENERATION; RESIDUES; URACIL AB We previously reported that a variety of human cells and tissues contained a M(r) 35,000 DNA-binding protein which selectively recognized a single 1,N6-ethenoadenine in a defined 25-base double-stranded oligonucleotide (B. Rydberg et al., Proc. Natl. Acad. Sci. USA, 88: 6839-6842, 1991). We now demonstrate that incubation of the same duplex with 50-fold partially purified binding protein from human placenta results in release of the free 1,N6-ethenoadenine base, indicative of DNA glycosylase action. This enzyme activity appears unique in that it excises a cyclic adduct resulting from a known human carcinogen. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DONNER LAB,DIV CELL & MOLEC BIOL,BERKELEY,CA 94720. FU NCI NIH HHS [CA47723] NR 17 TC 32 Z9 32 U1 0 U2 0 PU AMER ASSOC CANCER RESEARCH PI PHILADELPHIA PA PUBLIC LEDGER BLDG, SUITE 816, 150 S. INDEPENDENCE MALL W., PHILADELPHIA, PA 19106 SN 0008-5472 J9 CANCER RES JI Cancer Res. PD MAR 1 PY 1992 VL 52 IS 5 BP 1377 EP 1379 PG 3 WC Oncology SC Oncology GA HF637 UT WOS:A1992HF63700053 PM 1737401 ER PT J AU RAMAKRISHNA, NVS DEVANESAN, PD ROGAN, EG CAVALIERI, EL JEONG, H JANKOWIAK, R SMALL, GJ AF RAMAKRISHNA, NVS DEVANESAN, PD ROGAN, EG CAVALIERI, EL JEONG, H JANKOWIAK, R SMALL, GJ TI MECHANISM OF METABOLIC-ACTIVATION OF THE POTENT CARCINOGEN 7, 12-DIMETHYLBENZ[A]ANTHRACENE SO CHEMICAL RESEARCH IN TOXICOLOGY LA English DT Article ID ONE-ELECTRON OXIDATION; AROMATIC HYDROCARBON CARCINOGENESIS; TUMOR-INITIATING ACTIVITY; RAT-LIVER MICROSOMES; HORSERADISH-PEROXIDASE; RADICAL CATIONS; DNA ADDUCTS; NUCLEOSIDE ADDUCTS; CATALYZED BINDING; SENCAR MICE AB The DNA adducts of 7,12-dimethylbenz[a]anthracene (DMBA) previously identified in vitro and in vivo are stable adducts formed by reaction of the bay-region diol epoxides of DMBA with dG and dA. In this paper we report identification of several new DMBA-DNA adducts formed by one-electron oxidation, including two adducts lost from DNA by depurination, DMBA bound at the 12-methyl to the N-7 of adenine (Ade) or guanine (Gua) [7-methylbenz[a]anthracene (MBA-12-CH2-N7Ade or 7-MBA-12-CH2-N7Gua, respectively]. The in vitro systems used to study DNA adduct formation were DMBA activated by horseradish peroxidase or 3-methyl-cholanthrene-induced rat liver microsomes. The biologically-formed depurination adducts were identified by high-pressure liquid chromatography and by fluorescence line narrowing spectroscopy. Stable DMBA-DNA adducts were analyzed by the P-32-postlabeling method. Quantitation of DMBA-DNA adducts formed by microsomes showed about 99% as depurination adducts: 7-MBA-12-CH2-N7Ade (82%) and 7-MBA-12-CH2-N7Gua (17%). Stable adducts (1.4% of total) included one adduct spot that may contain adduct(s) formed from the diol epoxide (0.2%) and unidentified adducts (1.2%). Activation of DMBA by horseradish peroxidase afforded 56% of stable unidentified adducts and 44% of depurination adducts, with 36% of 7-MBA-12-CH2-N7Ade and 8% of 7-MBA-12-CH2-N7Gua. Adducts containing the bond to the DNA base at the 7-CH3 group of DMBA were not detected. These results show that with activation by cytochrome P-450 the DMBA-DNA adducts are predominantly formed by one-electron oxidation and lost from DNA by depurination, and the adducts formed by the diol epoxide pathway are very minor. The 12-CH3 group is shown to be critical in metabolic activation of DMBA, a finding consistent with the results of carcinogenicity studies in rodents. C1 UNIV NEBRASKA,MED CTR,EPPLEY INST RES CANC & ALLIED DIS,600 S 42ND ST,OMAHA,NE 68198. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES,IA 50011. FU NCI NIH HHS [R01 CA44686, R01 CA25176, P01 CA49210] NR 44 TC 57 Z9 58 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0893-228X J9 CHEM RES TOXICOL JI Chem. Res. Toxicol. PD MAR-APR PY 1992 VL 5 IS 2 BP 220 EP 226 DI 10.1021/tx00026a011 PG 7 WC Chemistry, Medicinal; Chemistry, Multidisciplinary; Toxicology SC Pharmacology & Pharmacy; Chemistry; Toxicology GA HK929 UT WOS:A1992HK92900011 PM 1643251 ER PT J AU DEVANESAN, PD RAMAKRISHNA, NVS TODOROVIC, R ROGAN, EG CAVALIERI, EL JEONG, H JANKOWIAK, R SMALL, GJ AF DEVANESAN, PD RAMAKRISHNA, NVS TODOROVIC, R ROGAN, EG CAVALIERI, EL JEONG, H JANKOWIAK, R SMALL, GJ TI IDENTIFICATION AND QUANTITATION OF BENZO[A]PYRENE DNA ADDUCTS FORMED BY RAT-LIVER MICROSOMES INVITRO SO CHEMICAL RESEARCH IN TOXICOLOGY LA English DT Article ID AROMATIC HYDROCARBON CARCINOGENESIS; ONE-ELECTRON OXIDATION; RADICAL CATIONS; DIOL-EPOXIDE; BINDING; INVIVO AB The two DNA adducts of benzo[a]pyrene (BP) previously identified in vitro and in vivo are the stable adduct formed by reaction of the bay-region diol epoxide of BP (BPDE) at C-10 with the 2-amino group of dG (BPDE-10-N2dG) and the adduct formed by reaction of BP radical cation at C-6 with the N-7 of Gua (BP-6-N7Gua), which is lost from DNA by depurination. In this paper we report identification of several new BP-DNA adducts formed by one-electron oxidation and the diol epoxide pathway, namely, BP bound at C-6 to the C-8 of Gua (BP-6-C8Gua) and the N-7 of Ade (BP-6-N7Ade) and BPDE bound at C-10 to the N-7 of Ade (BPDE-10-N7Ade). The in vitro systems used to study DNA adduct formation were BP activated by horseradish peroxidase or 3-methylcholanthrene-induced rat liver microsomes, BP 7,8-dihydrodiol activated by microsomes, and BPDE reacted with DNA. Identification of the biologically-formed depurination adducts was achieved by comparison of their retention times on high-pressure liquid chromatography in two different solvent systems and by comparison of their fluorescence line narrowing spectra with those of authentic adducts. The quantitation of BP-DNA adducts formed by rat liver microsomes showed 81% as depurination adducts: BP-6-N7Ade (58%), BP-6-N7Gua (10%), BP-6-C8Gua (12%), and BPDE-10-N7Ade (0.5%). Stable adducts (19% of total) included BPDE-10-N2dG (15%) and unidentified adducts (4%). Microsomal activation of BP 7,8-dihydrodiol yielded 80% stable adducts, with 77% as BPDE-10-N2dG and 20% of the depurination adduct BPDE-10-N7Ade. The percentage of BPDE-10-N2dG (94%) was higher when BPDE was reacted with DNA, and only 1.8% of BPDE-10-N7Ade was obtained. Activation of BP by horseradish peroxidase afforded 32% of stable unidentified adducts and 68% of depurination adducts, with 48% of BP-6-N7Ade, 9% of BP-6-N7Gua, and 11% of BP-6-C8Gua. These results show that with activation by cytochrome P-450 the BP-DNA adducts are predominantly formed by one-electron oxidation and lost from DNA by depurination. C1 UNIV NEBRASKA,MED CTR,EPPLEY INST RES CANC & ALLIED DIS,600 S 42ND ST,OMAHA,NE 68198. IOWA STATE UNIV SCI & TECHNOL,US DOE,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. FU NCI NIH HHS [R01-CA25176, R01-CA44686, P01-CA49210] NR 18 TC 111 Z9 112 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0893-228X J9 CHEM RES TOXICOL JI Chem. Res. Toxicol. PD MAR-APR PY 1992 VL 5 IS 2 BP 302 EP 309 DI 10.1021/tx00026a024 PG 8 WC Chemistry, Medicinal; Chemistry, Multidisciplinary; Toxicology SC Pharmacology & Pharmacy; Chemistry; Toxicology GA HK929 UT WOS:A1992HK92900024 PM 1643262 ER PT J AU WANG, HH GEISER, U WILLIAMS, JM CARLSON, KD KINI, AM MASON, JM PERRY, JT CHARLIER, HA CROUCH, AVS HEINDL, JE LATHROP, MW LOVE, BJ WATKINS, DM YACONI, GA AF WANG, HH GEISER, U WILLIAMS, JM CARLSON, KD KINI, AM MASON, JM PERRY, JT CHARLIER, HA CROUCH, AVS HEINDL, JE LATHROP, MW LOVE, BJ WATKINS, DM YACONI, GA TI PHASE SELECTIVITY IN THE SIMULTANEOUS SYNTHESIS OF THE TC = 12.8-K (0.3-KBAR) ORGANIC SUPERCONDUCTOR KAPPA-(BEDT-TTF)2CU[N(CN)2]CL OR THE SEMICONDUCTOR (BEDT-TTF)CU[N(CN)2]2 SO CHEMISTRY OF MATERIALS LA English DT Note ID CRYSTAL; SALT C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP WANG, HH (reprint author), ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439, USA. RI Kini, Aravinda/F-4467-2012 NR 16 TC 18 Z9 18 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD MAR-APR PY 1992 VL 4 IS 2 BP 247 EP 249 DI 10.1021/cm00020a003 PG 3 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA HL702 UT WOS:A1992HL70200003 ER PT J AU TOLMAN, CA JACKSON, NB AF TOLMAN, CA JACKSON, NB TI PUZZLING CHEMISTRY SO CHEMTECH LA English DT Article ID ZEOLITES C1 SANDIA NATL LABS,DIV PROC RES,ALBUQUERQUE,NM 87185. RP TOLMAN, CA (reprint author), DUPONT CO,DEPT CENT RES & DEV,EXPTL STN,POB 80328,WILMINGTON,DE 19880, USA. NR 19 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0009-2703 J9 CHEMTECH JI Chemtech PD MAR PY 1992 VL 22 IS 3 BP 168 EP 171 PG 4 WC Chemistry, Applied SC Chemistry GA HG542 UT WOS:A1992HG54200009 ER PT J AU NEELIN, JD LATIF, M ALLAART, MAF CANE, MA CUBASCH, U GATES, WL GENT, PR GHIL, M GORDON, C LAU, NC MECHOSO, CR MEEHL, GA OBERHUBER, JM PHILANDER, SGH SCHOPF, PS SPERBER, KR STERL, A TOKIOKA, T TRIBBIA, J ZEBIAK, SE AF NEELIN, JD LATIF, M ALLAART, MAF CANE, MA CUBASCH, U GATES, WL GENT, PR GHIL, M GORDON, C LAU, NC MECHOSO, CR MEEHL, GA OBERHUBER, JM PHILANDER, SGH SCHOPF, PS SPERBER, KR STERL, A TOKIOKA, T TRIBBIA, J ZEBIAK, SE TI TROPICAL AIR-SEA INTERACTION IN GENERAL-CIRCULATION MODELS SO CLIMATE DYNAMICS LA English DT Review ID EASTERN EQUATORIAL PACIFIC; NINO SOUTHERN OSCILLATION; PLANETARY BOUNDARY-LAYER; WIND STRESS PATTERNS; EL-NINO; SURFACE TEMPERATURE; OCEAN MODEL; WORLD OCEAN; SEASONAL CYCLE; ATMOSPHERIC CIRCULATION AB An intercomparison is undertaken of the tropical behavior of 17 coupled ocean-atmosphere models in which at least one component may be termed a general circulation model (GCM). The aim is to provide a taxonomy-a description and rough classification-of behavior across the ensemble of models, focusing on interannual variability. The temporal behavior of the sea surface temperature (SST) field along the equator is presented for each model, SST being chosen as the primary variable for intercomparison due to its crucial role in mediating the coupling and because it is a sensitive indicator of climate drift. A wide variety of possible types of behavior are noted among the models. Models with substantial interannual tropical variability may be roughly classified into cases with propagating SST anomalies and cases in which the SST anomalies develop in place. A number of the models also exhibit significant drift with respect to SST climatology. However, there is not a clear relationship between climate drift and the presence or absence of interannual oscillations. In several cases, the mode of climate drift within the tropical Pacific appears to involve coupled feedback mechanisms similar to those responsible for El Nino variability. Implications for coupled-model development and for climate prediction on seasonal to interannual time scales are discussed. Overall, the results indicate considerable sensitivity of the tropical coupled ocean-atmosphere system and suggest that the simulation of the warm-pool/cold-tongue configuration in the equatorial Pacific represents a challenging test for climate model parameterizations. C1 MAX PLANCK INST METEOROL, W-2000 HAMBURG, GERMANY. KONINKLIJK NEDERLANDS METEOROL INST, DE BILDT, NETHERLANDS. GEOPHYS FLUID DYNAM LAB, PRINCETON, NJ 08542 USA. PRINCETON UNIV, ATMOSPHER & OCEAN SCI PROGRAM, PRINCETON, NJ 08542 USA. METEOROL RES INST, TSUKUBA, IBARAKI 305, JAPAN. COLUMBIA UNIV, LAMONT DOHERTY GEOL OBSERV, PALISADES, NY 10964 USA. UNIV CALIF LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. NATL CTR ATMOSPHER RES, BOULDER, CO 80307 USA. UNIV CALIF LOS ANGELES, INST GEOPHYS & PLANETARY PHYS, LOS ANGELES, CA 90024 USA. NASA, GODDARD SPACE FLIGHT CTR, HYDROSPHER PROC LAB, GREENBELT, MD 20771 USA. UNIV OXFORD, CLARENDON LAB, HOOKE INST ATMOSPHERE RES, METEOROL UNIT, OXFORD OX1 3PU, ENGLAND. RP NEELIN, JD (reprint author), UNIV CALIF LOS ANGELES, DEPT ATMOSPHER SCI, LOS ANGELES, CA 90024 USA. RI Neelin, J. David/H-4337-2011; Cane, Mark/I-8086-2012; Sperber, Kenneth/H-2333-2012; Latif, Mojib/C-2428-2016 OI Latif, Mojib/0000-0003-1079-5604 NR 136 TC 157 Z9 165 U1 1 U2 12 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0930-7575 J9 CLIM DYNAM JI Clim. Dyn. PD MAR PY 1992 VL 7 IS 2 BP 73 EP 104 PG 32 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA HL450 UT WOS:A1992HL45000002 ER PT J AU GRIFFITHS, SK NILSON, RH AF GRIFFITHS, SK NILSON, RH TI SIMILARITY ANALYSIS OF FRACTURE GROWTH AND FLAME SPREAD IN DEFORMABLE SOLID-PROPELLANTS SO COMBUSTION AND FLAME LA English DT Article ID DETONATION TRANSITION; DEFLAGRATION; COMBUSTION AB Fracture growth and flame spread in deformable gas-generating pyrotechnics are analyzed using a transient one-dimensional model of the fluid motion along the fracture, coupled with a quasi-steady model of the two-dimensional elastic deformation of a brittle material having negligible fracture toughness. Fracture wall recession and the associated mass generation within the fracture are described by a pressure dependent burning rate of the form ap(n), and the gaseous combustion products are considered ideal and isothermal. For fully turbulent flow, the fracture speed and flame spreading rate are constant in time, and the profiles of the pressure, aperture. and fluid velocity along the fracture are self-similar. A broad range of similarity solutions is presented to illustrate the dependence of the propagation speed and internal pressure distribution on material properties, burning rate constants, confining stress and fracture inlet pressure. Additional solutions are presented for an alternate scaling appropriate to very large burning Fates, and for cases in which the burning rate exhibits a low-pressure threshold. C1 S CUBED INC,LA JOLLA,CA 92038. RP GRIFFITHS, SK (reprint author), SANDIA NATL LABS,LIVERMORE,CA 94551, USA. NR 25 TC 1 Z9 1 U1 0 U2 3 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0010-2180 J9 COMBUST FLAME JI Combust. Flame PD MAR PY 1992 VL 88 IS 3-4 BP 369 EP 383 DI 10.1016/0010-2180(92)90040-V PG 15 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA HJ453 UT WOS:A1992HJ45300007 ER PT J AU CHEN, JY KOLLMANN, W AF CHEN, JY KOLLMANN, W TI PDF MODELING AND ANALYSIS OF THERMAL NO FORMATION IN TURBULENT NONPREMIXED HYDROGEN AIR-JET FLAMES SO COMBUSTION AND FLAME LA English DT Article ID NITRIC-OXIDE FORMATION; DIFFUSION FLAMES AB A numerical model is developed based on the probability density function (pdf) approach to study the thermal No formation in turbulent nonpremixed hydrogen jet flames. In particular, the effects of nonequilibrium chemistry and radiation heat loss on the thermal NO formation are examined. The numerical results indicate that when the NOx emission index is scaled with a properly defined flame residence time, it shows the negative one-half power dependence on the Damkohler number as observed by Chen and Driscoll [Twenty-Third Symposium (International) on Combustion]. An analysis is performed suggesting that the observed power dependence is due to the nonequilibrium chemistry effect, and it depends on the self-similar laws for jets. Comparisons of numerical results obtained with and without radiation heat loss show a significant impact on the thermal NO formation for jet flames with radiant fractions greater than 5%. C1 SANDIA NATL LABS, COMBUST RES FACIL, LIVERMORE, CA 94550 USA. UNIV CALIF DAVIS, DEPT MECH ENGN, DAVIS, CA 95616 USA. NR 29 TC 52 Z9 54 U1 1 U2 2 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0010-2180 EI 1556-2921 J9 COMBUST FLAME JI Combust. Flame PD MAR PY 1992 VL 88 IS 3-4 BP 397 EP 412 DI 10.1016/0010-2180(92)90042-N PG 16 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA HJ453 UT WOS:A1992HJ45300009 ER PT J AU VU, HX BRACKBILL, JU AF VU, HX BRACKBILL, JU TI CELEST1D - AN IMPLICIT, FULLY KINETIC-MODEL FOR LOW-FREQUENCY, ELECTROMAGNETIC PLASMA SIMULATION SO COMPUTER PHYSICS COMMUNICATIONS LA English DT Article ID INDUCED SURFACE TRANSPORT; LASER-IRRADIATED FOILS; PARTICLE SIMULATION; ION-BEAM; EVOLUTION; SHOCKS AB An implicit, one-dimensional, fully-electromagnetic particle simulation code (CELEST1D) is presented in which both electrons and ions are treated kinetically using finite-size particles. The implicit time-advanced field equations are cast in a form convenient for Gaussian elimination, and the field equations are solved directly for arbitrary time steps without iteration. CELEST1D has been tested on a number of standard problems, and the results are similar to those obtained by existing one-dimensional electromagnetic particle and hybrid codes. Results from the simulations of the electrostatic two-stream instability, of the electrostatic sheath-plasma oscillation, and of the electromagnetic, low-density ion-beam instability are presented. RP VU, HX (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. NR 29 TC 59 Z9 59 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0010-4655 J9 COMPUT PHYS COMMUN JI Comput. Phys. Commun. PD MAR-APR PY 1992 VL 69 IS 2-3 BP 253 EP 276 DI 10.1016/0010-4655(92)90165-U PG 24 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA HN520 UT WOS:A1992HN52000005 ER PT J AU HAN, JH LEBOEUF, JN AF HAN, JH LEBOEUF, JN TI PARTICLE SIMULATION-MODEL OF THE LORENTZ COLLISION OPERATOR IN GUIDING-CENTER PLASMAS SO COMPUTER PHYSICS COMMUNICATIONS LA English DT Article AB A simulation model of the Lorentz collision operator has been developed for guiding-center electron plasmas. In this model both the energy and the magnetic moment of the magnetized electrons are conserved. We implemented a two-and-one-half-dimensional (2 1/2-D) guiding-center particle code with this model to study low-frequency electrostatic resistive interchange modes in sheared slab geometry. The growth rates and linear eigenmode widths obtained from the particle simulation and from linear kinetic theory agree very well. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP HAN, JH (reprint author), UNIV TEXAS,INST FUS STUDIES,AUSTIN,TX 78712, USA. NR 10 TC 0 Z9 0 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0010-4655 J9 COMPUT PHYS COMMUN JI Comput. Phys. Commun. PD MAR-APR PY 1992 VL 69 IS 2-3 BP 277 EP 286 DI 10.1016/0010-4655(92)90166-V PG 10 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA HN520 UT WOS:A1992HN52000006 ER PT J AU WULLSCHLEGER, SD OOSTERHUIS, DM AF WULLSCHLEGER, SD OOSTERHUIS, DM TI CANOPY LEAF-AREA DEVELOPMENT AND AGE-CLASS DYNAMICS IN COTTON SO CROP SCIENCE LA English DT Article ID GOSSYPIUM-HIRSUTUM-L; CARBON PRODUCTION; GROWTH; LEAVES; PHOTOSYNTHESIS; YIELD; SENESCENCE; WATER AB Leaf senescence contributes to reduced canopy photosynthesis when new leaf initiation cannot compensate for increased leaf aging after canopy closure. However, since leaf aging is seldom addressed in whole-plant investigations, it is difficult to evaluate how age-class composition influences crop productivity. Field studies were conducted to examine leaf area development in cotton (Gossypium hirsutum L.) and to incorporate this information into a simulation model for assessing canopy age-class dynamics. Simulated results indicated that leaf area produced during rapid canopy expansion (60 DAP [days after planting], LAI [leaf area index] = 2.3) was largely composed of young leaves, with > 35% of the LAI being < 14 d old. However, 30 d later (90 DAP, LAI = 4.5) leaf area production was no longer sufficient to offset leaf aging and the percentage LAI < 14 d old decreased to < 10%, while leaves > 29 d old increased to 75%. This shift in age-class composition toward progressively older leaves altered the relative contribution of C from differing layers within the canopy. The middle portion of the canopy was the most important contributor of C early in crop growth, supplemented by roughly equal contributions from the lower and upper canopies. However, after 90 DAP the supply of assimilate from the upper canopy rapidly increased to > 45% and that of the lower canopy decreased dramatically. Towards the end of the season (120 DAP), the middle and upper portions of the canopy were about equally divided in their importance to late-season C production. These results highlight the dynamic nature of age-related processes within the cotton canopy and the importance of leaf area development in sustaining whole-plant C production. C1 UNIV ARKANSAS,ALTHEIMER LAB,DEP AGRON,FAYETTEVILLE,AR 72701. RP WULLSCHLEGER, SD (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,OAK RIDGE,TN 37831, USA. RI Wullschleger, Stan/B-8297-2012 OI Wullschleger, Stan/0000-0002-9869-0446 NR 29 TC 13 Z9 21 U1 0 U2 3 PU CROP SCIENCE SOC AMER PI MADISON PA 677 S SEGOE ROAD, MADISON, WI 53711 SN 0011-183X J9 CROP SCI JI Crop Sci. PD MAR-APR PY 1992 VL 32 IS 2 BP 451 EP 456 PG 6 WC Agronomy SC Agriculture GA HQ302 UT WOS:A1992HQ30200035 ER EF