FN Thomson Reuters Web of Science™ VR 1.0 PT J AU KAN, XB ROBERTSON, JL MOSS, SC KULIK, J ISHIMASA, T MORI, M QUIVY, A GRATIAS, D ELSER, V ZSCHACK, P AF KAN, XB ROBERTSON, JL MOSS, SC KULIK, J ISHIMASA, T MORI, M QUIVY, A GRATIAS, D ELSER, V ZSCHACK, P TI CRYSTALLOGRAPHIC CHARACTERIZATION OF A SINGLE QUASI-CRYSTAL OF AL-CU-FE SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON QUASICRYSTALS CY MAY 31-JUN 05, 1992 CL WASHINGTON UNIV, ST LOUIS, MO SP WASHINGTON UNIV, NATL SCI FDN, US DOE, AMER LAB, INT UNION CRYSTALLOG, JEOL HO WASHINGTON UNIV ID QUASI-CRYSTALS; ALLOYS; RU AB Large, single-quasicrystalline grains, both cooled from the melt and annealed on cooling at approximately 825-degrees, were ground approximately into spheres with a resultant diameter of approximately 0.2 mm. These crystals were then studied at the NSLS where, using lambda = 1 angstrom, integrated intensities on more than 1300 (inequivalent) reflections were collected out to Q(perpendicular-to) greater than 1.7 angstrom-1 (Q(parrallel-to) units). A crucial aspect of this work has been the careful characterization of crystal quality. For example, Bragg radial (theta-2theta) scans reveal a nearly perfect Gaussian profile while omega (omega) scans show essentially a pure Lorentzian shape. The Q-width (FWHM) of the radial scans increases from approximately 0.006 to 0.009 angstrom-1 as Q(parallel-to) increases from 1 to 11 angstrom-1. The FWHM in omega is characteristically about 0.065-degrees with a mean variation of approximately 0.01-degrees, and its lineshape appears to be associated with a true mosaic spread as it does not depend in any essential way on angle or on Q(perpendicular-to) or Q(parallel-to). Through depth-dependent measurements we show that the Lorentzian profile is substantially enhanced by mechanical grinding, although an unground crystal fragment still displays Lorentzian wings. TEM on unground samples from both sources reveals sharp diffraction spots with ideal icosahedral symmetry and images that indicate an icosahedral phase rather than an ensemble of approximant domains. C1 UNIV HOUSTON,DEPT PHYS,HOUSTON,TX 77204. NIST,DIV REACTOR RADIAT,GAITHERSBURG,MD 20899. UNIV HOUSTON,TEXAS CTR SUPERCONDUCT,HOUSTON,TX 77004. NAGOYA UNIV,COLL GEN EDUC,NAGOYA 46401,JAPAN. CECM,CNRS,F-94400 VITRY,FRANCE. CORNELL UNIV,DEPT PHYS,ITHACA,NY 14853. BROOKHAVEN NATL LAB,NSLS,ORAU,UPTON,NY 11973. RI Ishimasa, Tsutomu/F-4509-2010 NR 14 TC 9 Z9 9 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD FEB PY 1993 VL 153 BP 33 EP 39 DI 10.1016/0022-3093(93)90309-L PG 7 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA KP936 UT WOS:A1993KP93600009 ER PT J AU LIBBERT, JL KELTON, KF GIBBONS, PC GOLDMAN, AI AF LIBBERT, JL KELTON, KF GIBBONS, PC GOLDMAN, AI TI LARGE UNIT-CELL CRYSTAL APPROXIMANT IN TI-CR-SI ALLOYS SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON QUASICRYSTALS CY MAY 31-JUN 05, 1992 CL WASHINGTON UNIV, ST LOUIS, MO SP WASHINGTON UNIV, NATL SCI FDN, US DOE, AMER LAB, INT UNION CRYSTALLOG, JEOL HO WASHINGTON UNIV ID ICOSAHEDRAL PHASE; AL-MN; QUASICRYSTAL AB We report the discovery of a new, apparently stable, large unit cell bcc structure in slowly cooled Ti-Cr-Si alloys. This bcc phase, which is also found in Ti-Mn-Si and Ti-V-Si alloys, is likely the crystal approximant related to i-phase formation in the Ti-3d transition metal alloys. Single phase samples of this material were obtained by prolonged annealing at 1200-degrees-C. We report the results of a Rietveld structural analysis performed on X-ray powder data obtained from these single phase samples which indicate that this phase is closely related to the alpha(Al-Mn-Si) phase. a crystal approximant related to the icosahedral phase in Al-Mn-Si systems. C1 US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES,IA 50011. RP LIBBERT, JL (reprint author), WASHINGTON UNIV,DEPT PHYS,1 BROOKINGS DR,ST LOUIS,MO 63130, USA. NR 11 TC 16 Z9 16 U1 2 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD FEB PY 1993 VL 153 BP 53 EP 57 DI 10.1016/0022-3093(93)90313-M PG 5 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA KP936 UT WOS:A1993KP93600013 ER PT J AU SHIN, MC STRANDBURG, KJ AF SHIN, MC STRANDBURG, KJ TI RANDOM TILING APPROACH TO THE STRUCTURE OF DECAGONAL QUASI-CRYSTALS SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON QUASICRYSTALS CY MAY 31-JUN 05, 1992 CL WASHINGTON UNIV, ST LOUIS, MO SP WASHINGTON UNIV, NATL SCI FDN, US DOE, AMER LAB, INT UNION CRYSTALLOG, JEOL HO WASHINGTON UNIV AB The properties of random tiling models for the structure of decagonal quasicrystals are studied using computer simulation. In these models the individual layers are random tilings or binary random tilings and the tiling configurations of adjacent layers are coupled. We simulate the equilibrium behavior of the model and compute elastic constants and entropy. We use of the atomic structure models to decorate the tilings and produce simulated electron micrographs and compare them with the images obtained in high-resolution electron microscopy (HREM) experiments. We also compute the diffraction intensities. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60208. 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 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD FEB PY 1993 VL 153 BP 253 EP 257 DI 10.1016/0022-3093(93)90352-X PG 5 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA KP936 UT WOS:A1993KP93600052 ER PT J AU SMITH, AP AF SMITH, AP TI THE SPHERE PACKING PROBLEM IN QUASI-CRYSTALS SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON QUASICRYSTALS CY MAY 31-JUN 05, 1992 CL WASHINGTON UNIV, ST LOUIS, MO SP WASHINGTON UNIV, NATL SCI FDN, US DOE, AMER LAB, INT UNION CRYSTALLOG, JEOL HO WASHINGTON UNIV ID QUASI-CRYSTAL MODELS; DENSITIES AB The higher-dimensional viewpoint is used to analyze the problem of finding quasicrystals that pack spheres well, and this implies a search for 'maximal' acceptance domains. The basic constraints are symmetry and non-intersection under certain perpendicular-space translations and the maximal convex domains are just the polyhedral Voronoi domains. When disconnected pieces are allowed, significant improvement in packing fraction is possible, and inflation rules for a dodecagonal triangle-square tiling produce beautifully intricate disconnected acceptance domains. A numerical approach to acceptance domain maximization produces similar structures, and also provides a lower bound for the 'deterministic entropy' associated with the many different allowed maximal domains. RP SMITH, AP (reprint author), ARGONNE NATL LAB,DIV MAT SCI,BLDG 223,ARGONNE,IL 60439, USA. OI Smith, Arthur/0000-0002-6035-7736 NR 20 TC 21 Z9 21 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD FEB PY 1993 VL 153 BP 258 EP 263 DI 10.1016/0022-3093(93)90353-Y PG 6 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA KP936 UT WOS:A1993KP93600053 ER PT J AU SHASTRI, A BORSA, F GOLDMAN, AI SHIELD, JE TORGESON, DR AF SHASTRI, A BORSA, F GOLDMAN, AI SHIELD, JE TORGESON, DR TI NMR-STUDY OF THE ELECTRONIC-PROPERTIES OF AL-CU-FE AND AL-CU-RU QUASI-CRYSTALS SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON QUASICRYSTALS CY MAY 31-JUN 05, 1992 CL WASHINGTON UNIV, ST LOUIS, MO SP WASHINGTON UNIV, NATL SCI FDN, US DOE, AMER LAB, INT UNION CRYSTALLOG, JEOL HO WASHINGTON UNIV ID ALLOYS AB Al-27 and Cu-63 Knight shift (K) and relaxation rates (T1(-1)) are compared for the quasicrystalline (QC) phase and the crystalline (C) phase of Al65Cu23Fe12, and for quasicrystals of Al85-xCuxRu15 with x = 17, 20. The (Al K)-Al-27 is small (K = 0.013 +/- 0.003%) and temperature independent. Within error, no differences were found between QC- and C-phases of A]CuFe, nor between AlCuRu samples with x = 17, 20. Al-27 and Cu-63 T1(-1) vs T in AlCuRu displays Korringa-like behavior in the range 5 < T < 50 K with T1T independent of composition. The NMR results are compared with specific heat data which change as a function of concentration x, suggesting large changes of density of states (DOS) at the Fermi level. The two sets of measurements could be reconciled by separating the s-band and d-band effects but the possibility that some of the observed effects are due to disorder modes cannot be ruled out. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. RP SHASTRI, A (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011, USA. NR 13 TC 14 Z9 14 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD FEB PY 1993 VL 153 BP 347 EP 352 DI 10.1016/0022-3093(93)90371-4 PG 6 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA KP936 UT WOS:A1993KP93600071 ER PT J AU SHIELD, JE MCCALLUM, RW GOLDMAN, AI GIBBONS, PC KELTON, KF AF SHIELD, JE MCCALLUM, RW GOLDMAN, AI GIBBONS, PC KELTON, KF TI PHASE STABILITIES IN THE AL-CU-RU SYSTEM SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON QUASICRYSTALS CY MAY 31-JUN 05, 1992 CL WASHINGTON UNIV, ST LOUIS, MO SP WASHINGTON UNIV, NATL SCI FDN, US DOE, AMER LAB, INT UNION CRYSTALLOG, JEOL HO WASHINGTON UNIV ID RAPID SOLIDIFICATION; ORDERED STRUCTURES; QUASICRYSTALS; ALLOYS AB Isothermal sections of the Al-Cu-Ru phase diagram at 500 and 800-degrees-C have been determined for Al concentrations greater than 60 at.%. At 500-degrees-C, the icosahedral phase is not thermodynamically stable, whereas at 800-degrees-C it is stable over a fairly broad compositional region. The formation of the fci phase from the low temperature tetragonal phase is by a nucleation and growth process. The first-order transformation to the fci phase is endothermic, indicating that the fci phase is at a higher energy than the tetragonal phase. C1 WASHINGTON UNIV,DEPT PHYS,ST LOUIS,MO 63130. RP SHIELD, JE (reprint author), IOWA STATE UNIV SCI & TECHNOL,USDOE,AMES LAB,AMES,IA 50011, USA. NR 20 TC 7 Z9 7 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD FEB PY 1993 VL 153 BP 504 EP 507 DI 10.1016/0022-3093(93)90404-L PG 4 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA KP936 UT WOS:A1993KP93600104 ER PT J AU DEBOISSIEU, M BOUDARD, M MOUDDEN, H QUILICHINI, M BELLISSENT, R HENNION, B CURRAT, R GOLDMAN, A JANOT, C AF DEBOISSIEU, M BOUDARD, M MOUDDEN, H QUILICHINI, M BELLISSENT, R HENNION, B CURRAT, R GOLDMAN, A JANOT, C TI DYNAMIC PROPERTIES OF THE ALPDMN ICOSAHEDRAL PHASE SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article; Proceedings Paper CT 4TH INTERNATIONAL CONF ON QUASICRYSTALS CY MAY 31-JUN 05, 1992 CL WASHINGTON UNIV, ST LOUIS, MO SP WASHINGTON UNIV, NATL SCI FDN, US DOE, AMER LAB, INT UNION CRYSTALLOG, JEOL HO WASHINGTON UNIV ID INELASTIC-NEUTRON-SCATTERING; AL-PD-MN; QUASI-CRYSTAL; LATTICE; PHONONS AB A centimetre-sized single grain of the perfect AlPdMn icosahedral phase can be grown by slow cooling from the liquid. This phase has been shown to have perfect icosahedral symmetry, i.e. without any frozen phason strain. The dynamical properties of this icosahedral phase have been studied by mean of inelastic measurements on triple axis spectrometers. The dispersion relations around several Bragg reflections were measured. Pseudo-zone boundaries can be defined, similarly to those previously obtained in the AlLiCu phase. A dispersionless optic mode was identified around 4 THz. C1 ILL GRENOBLE,F-38042 GRENOBLE 9,FRANCE. LAB CRISTALLOG GRENOBLE,CNRS,F-38042 GRENOBLE,FRANCE. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,USDOE,AMES,IA 50011. CENS,LLB,F-91190 GIF SUR YVETTE,FRANCE. RP DEBOISSIEU, M (reprint author), ENSEEG,LTPCM,BP 75,F-38402 ST MARTIN DHERES,FRANCE. NR 16 TC 10 Z9 10 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD FEB PY 1993 VL 153 BP 552 EP 556 DI 10.1016/0022-3093(93)90413-R PG 5 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA KP936 UT WOS:A1993KP93600113 ER PT J AU KELTON, KF GIBBONS, PC GOLDMAN, AI AF KELTON, KF GIBBONS, PC GOLDMAN, AI TI PROCEEDINGS OF THE 4TH INTERNATIONAL-CONFERENCE ON QUASI-CRYSTALS ST-LOUIS, MO, USA, MAY 31 JUNE 5, 1992 - FOREWORD SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Editorial Material C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP KELTON, KF (reprint author), WASHINGTON UNIV,DEPT PHYS,ST LOUIS,MO 63130, 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 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD FEB PY 1993 VL 153 BP R7 EP R8 DI 10.1016/0022-3093(93)90301-D PG 2 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA KP936 UT WOS:A1993KP93600001 ER PT J AU PHIFER, CC AF PHIFER, CC TI THE STRUCTURE OF BARIUM ZINC ALUMINATE GLASSES SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article ID EARTH BOROALUMINATE CRYSTALS; LOCAL-STRUCTURE; BAO-ZNO-AL2O3; SYSTEM AB An alternative structural model is proposed for glasses in the BaO-ZnO-Al2O3 system. The original discovers of the glasses assumed that the zinc atoms are three-coordinate, a condition which is at variance with known crystal structures. The assumptions that zinc is four-coordinate, oxygen can be three-coordinate, and aluminum can be four- or five-coordinate form the basis for a more realistic description of the glass structure. RP PHIFER, CC (reprint author), SANDIA NATL LABS,DIV 1845,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 21 TC 2 Z9 2 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD FEB PY 1993 VL 152 IS 2-3 BP 157 EP 160 DI 10.1016/0022-3093(93)90245-S PG 4 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA KN171 UT WOS:A1993KN17100008 ER PT J AU MAGRUDER, RH HENDERSON, DO MORGAN, SH ZUHR, RA AF MAGRUDER, RH HENDERSON, DO MORGAN, SH ZUHR, RA TI OPTICAL-SPECTRA OF PB IMPLANTED FUSED-SILICA SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article ID ION-IMPLANTATION; GLASSES; SIO2 AB The extinction coefficient over the spectral range of 1.8-6.2 eV and the infrared reflectance over the 5000 cm-1 to 75 cm-1 range were measured for a series of Pb ion-implanted high-purity silica substrates. The samples were implanted at room temperature with an energy of 320 keV for nominal doses of 1, 3 and 6x10(16) ions/cm2 . A sample implanted with a nominal dose of 6x10(16) ions/cm2 was annealed in air at 800-degrees-C for 1 h. The Pb ions form both elemental Pb and Pb-O particles in the as-implanted state. The extent of formation for each chemical state is dose-dependent. Upon annealing, the elemental Pb and Pb-O particles form a lead silicate phase in the implanted layer that is similar to conventionally prepared bulk lead silicate glasses. C1 BELMONT UNIV,DEPT PHYS,NASHVILLE,TN 37212. FISK UNIV,DEPT PHYS,NASHVILLE,TN 37208. OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. NR 27 TC 29 Z9 29 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD FEB PY 1993 VL 152 IS 2-3 BP 258 EP 266 DI 10.1016/0022-3093(93)90259-Z PG 9 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA KN171 UT WOS:A1993KN17100022 ER PT J AU ZINKLE, SJ SINGH, BN AF ZINKLE, SJ SINGH, BN TI ANALYSIS OF DISPLACEMENT DAMAGE AND DEFECT PRODUCTION UNDER CASCADE DAMAGE CONDITIONS SO JOURNAL OF NUCLEAR MATERIALS LA English DT Review ID MOLECULAR-DYNAMICS SIMULATION; NEUTRON-IRRADIATED METALS; FREELY-MIGRATING DEFECTS; DISLOCATION LOOPS; RADIATION-DAMAGE; ION-IRRADIATION; LOW-TEMPERATURE; RECOIL ENERGY; FCC METALS; ELEVATED-TEMPERATURES AB The production, annihilation, and accumulation of point defects in metals during displacive irradiation is dependent on a variety of physical conditions, including the nature and energy of the projectile particles and the irradiation temperature. This paper briefly reviews the evolution of the defect population in an isolated displacement cascade, and outlines a proposed framework for identifying the relevant components of displacement damage and defect production under cascade damage conditions. The most significant aspect of energetic cascades is that the concepts of atomic displacements and residual defect production must be treated separately. An evaluation of experimental and computer defect production studies indicates that the overall fraction of defects surviving correlated annihilation in an energetic displacement cascade in copper decreases from about 30% of the Norgett-Robinson-Torrens (NRT) calculated displacements at 4 K to about 10% of the NRT displacements at 300 K. Due to differences in the thermal stability of vacancy versus interstitial clusters, the fractions of freely migrating defects available for inducing microstructural changes at elevated temperatures may be higher for vacancies than for interstitials. The available evidence suggests that the fraction of freely migrating vacancies at temperatures relevant for void swelling in copper is greater than or similar to 5% of the calculated NRT displacements. C1 RISO NATL LAB,DEPT MAT,DK-4000 ROSKILDE,DENMARK. RP ZINKLE, SJ (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. OI Zinkle, Steven/0000-0003-2890-6915 NR 124 TC 112 Z9 113 U1 5 U2 40 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 FEB PY 1993 VL 199 IS 3 BP 173 EP 191 DI 10.1016/0022-3115(93)90140-T PG 19 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA KK430 UT WOS:A1993KK43000001 ER PT J AU DING, YS FOWLER, JS DEWEY, SL WOLF, AP LOGAN, J GATLEY, SJ VOLKOW, ND SHEA, C TAYLOR, DP AF DING, YS FOWLER, JS DEWEY, SL WOLF, AP LOGAN, J GATLEY, SJ VOLKOW, ND SHEA, C TAYLOR, DP TI SYNTHESIS AND PET STUDIES OF FLUORINE-18-BMY-14802 - A POTENTIAL ANTIPSYCHOTIC DRUG SO JOURNAL OF NUCLEAR MEDICINE LA English DT Article ID POSITRON EMISSION TOMOGRAPHY; SIGMA-RECEPTORS; BMY-14802; INVIVO AB BMY 14802 is a compound containing fluorine developed as a potential antipsychotic drug. It has a moderate affinity for the sigma binding site and a very low affinity for dopamine D2 receptors and has been predicted to have antipsychotic properties without the side effect potential of existing drugs. To assess the brain uptake, pharmacokinetics, stereoselectivity and binding properties of this potential antipsychotic drug, enantiomerically pure samples of (-) and (+)-[F-18]BMY 14802 were examined in a baboon with PET. A tissue distribution with racemic labeled BMY 14802 was also carried out in mice. Radiochemical yields of 15% at the end of bombardment (EOB) for the racemic mixture, and 5% for each enantiomer with a specific activity of 2-5 Ci/mumol at EOB were obtained. In baboons, [F-18]BMY 14802 cleared rapidly from the plasma and the glucuronidated [F-18]BMY 14802 appeared. Radioactivity peaked (0.04-0.07% dose/cc) in all areas of the brain examined at about 5 min postinjection. It then rapidly cleared to about 30% of peak value by 20 min postinjection and to less than 10% of peak by 60 min postinjection in all regions. A similar rapid clearance from brain was also observed in mice. Pretreatment with unlabeled BMY 14802 (7 mg/kg), did not produce the expected reductions in distribution volume and clearance halftimes consistent with receptor binding. Although the rapid kinetics of [F-18]BMY 14802 made it difficult to resolve the processes of transport and binding of the labeled drug, the lack of regional distribution consistent with the known distribution of sigma binding sites as well as the lack of stereoselectivity suggest that the behavior of BMY 14802 in the brain is dominated by its transport properties in tissue rather than its binding to sigma sites. Moreover, its rapid clearance from brain may be a limiting factor in its use ar as antipsychotic drug. C1 BRISTOL MYERS SQUIBB, PHARMACEUT RES INST, WALLINGFORD, CT USA. RP BROOKHAVEN NATL LAB, DEPT CHEM, BLDG 555, LEWIS RD, UPTON, NY 11973 USA. FU NINDS NIH HHS [NS-15638, NS-15380] NR 34 TC 28 Z9 32 U1 0 U2 1 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 EI 1535-5667 J9 J NUCL MED JI J. Nucl. Med. PD FEB PY 1993 VL 34 IS 2 BP 246 EP 254 PG 9 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA KK926 UT WOS:A1993KK92600017 PM 8094094 ER PT J AU HEYMSFIELD, SB YASUMURA, S AF HEYMSFIELD, SB YASUMURA, S TI SYMPOSIUM - AGING AND BODY-COMPOSITION - TECHNOLOGICAL ADVANCES AND PHYSIOLOGICAL INTERRELATIONSHIPS - INTRODUCTION SO JOURNAL OF NUTRITION LA English DT Editorial Material C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. RP HEYMSFIELD, SB (reprint author), COLUMBIA UNIV,COLL PHYS & SURG,ST LUKES ROOSEVELT HOSP,DEPT MED,OBES RES CTR,NEW YORK,NY 10025, USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU AMER INST NUTRITION PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0022-3166 J9 J NUTR JI J. Nutr. PD FEB PY 1993 VL 123 IS 2 SU S BP 430 EP 431 PG 2 WC Nutrition & Dietetics SC Nutrition & Dietetics GA KM528 UT WOS:A1993KM52800034 ER PT J AU HEYMSFIELD, SB WANG, ZM BAUMGARTNER, RN DILMANIAN, FA MA, RM YASUMURA, S AF HEYMSFIELD, SB WANG, ZM BAUMGARTNER, RN DILMANIAN, FA MA, RM YASUMURA, S TI BODY-COMPOSITION AND AGING - A STUDY BY INVIVO NEUTRON-ACTIVATION ANALYSIS SO JOURNAL OF NUTRITION LA English DT Article; Proceedings Paper CT SYMP ON HISTORICAL VIEW OF THE SAFETY OF THE FOOD SUPPLY, AT THE 76TH ANNUAL MEETING OF THE FEDERATION OF AMERICAN SOC FOR EXPERIMENTAL BIOLOGY CY APR 28, 1992 CL ANAHEIM, CA SP AMER SOC EXPTL BIOL DE BODY COMPOSITION; INVIVO NEUTRON-ACTIVATION ANALYSIS; 2-COMPARTMENT MODEL; AGING ID HUMANS; MODELS; FAT AB Human body composition can be organized into five levels; atomic, molecular, cellular, tissue-system and whole body. Six elements (carbon, nitrogen, calcium, potassium, sodium and chlorine) can be directly measured in vivo at the atomic level using three neutron-activation systems at Brookhaven National Laboratory. When combined with an estimate of total body water, the six elements can be used to quantify the major chemical components at molecular level. In the present report, we first describe the neutron-activation approach to evaluating chemical compartments in vivo. Then, we present an example of how in vivo estimates of human chemical composition can be used to study the validity of two-compartment indirect methods of quantifying total body fat in the elderly. Our studies and the work of other investigators at Brookhaven National Laboratory suggest that neutron activation analysis provides an important opportunity to study the relation between aging and changes in elemental and chemical composition of humans in vivo. C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. UNIV NEW MEXICO,SCH MED,CLIN NUTR RES LAB,ALBUQUERQUE,NM 87133. RP HEYMSFIELD, SB (reprint author), COLUMBIA UNIV,COLL PHYS & SURG,ST LUKES ROOSEVELT HOSP,DEPT MED,OBES RES CTR,NEW YORK,NY 10025, USA. FU NIDDK NIH HHS [P01-DK42618] NR 14 TC 30 Z9 30 U1 1 U2 4 PU AMER INST NUTRITION PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0022-3166 J9 J NUTR JI J. Nutr. PD FEB PY 1993 VL 123 IS 2 SU S BP 432 EP 437 PG 6 WC Nutrition & Dietetics SC Nutrition & Dietetics GA KM528 UT WOS:A1993KM52800035 PM 8429399 ER PT J AU YASUMURA, S JONES, K SPANNE, P SCHIDLOVSKY, G WIELOPOLSKI, L REN, X GLAROS, D XATZIKONSTANTINOU, Y AF YASUMURA, S JONES, K SPANNE, P SCHIDLOVSKY, G WIELOPOLSKI, L REN, X GLAROS, D XATZIKONSTANTINOU, Y TI INVIVO ANIMAL-MODELS OF BODY-COMPOSITION IN AGING SO JOURNAL OF NUTRITION LA English DT Article; Proceedings Paper CT SYMP ON HISTORICAL VIEW OF THE SAFETY OF THE FOOD SUPPLY, AT THE 76TH ANNUAL MEETING OF THE FEDERATION OF AMERICAN SOC FOR EXPERIMENTAL BIOLOGY CY APR 28, 1992 CL ANAHEIM, CA SP AMER SOC EXPTL BIOL DE RAT BODY COMPOSITION; BODY PROTEIN; MICROCOMPUTED TOMOGRAPHY OF BONE; X-RAY FLUORESCENCE OF BONE; NEUTRON ACTIVATION ANALYSIS ID BONE AB We developed several techniques that provide data on body elemental composition from in vivo measurements in rats. These methods include total body potassium by whole-body counting of endogenous K-40; total body calcium (TBCa), sodium and chloride by in vivo neutron activation analysis and total body phosphorus (TBP) and nitrogen (TBN) by photon activation analysis. These elements provide information on total body fat, total body protein and skeletal mass. Measurements were made in 6-, 12- and 24-month-old rats. TBN increased slightly between 6 and 12 months but was significantly lower by 24 months, indicating a substantial loss in total body protein. Working at the National Synchrotron Light Source, we studied rat femurs by computed microtomography (CMT), and the elemental profile of the femur cortex by synchrotron-radiation induced X-ray emission (SRIXE). Although there were no significant changes in TBCa and TBP, indices of skeletal mass, CMT revealed a marked increase in the size and number of cavities in the endosteal region of the femur cortex with increasing age. The SRIXE analysis of this cortical bone revealed a parallel decrease in the endosteal Ca/P ratio. Thus, there are major alterations in bone morphology and regional elemental composition despite only modest changes in total skeletal mass. C1 SUNY HLTH SCI CTR,BROOKLYN,NY. SUNY HLTH SCI CTR,STONY BROOK,NY. UNIV IOANNINA,IOANNINA,GREECE. RP YASUMURA, S (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 12 TC 17 Z9 17 U1 0 U2 0 PU AMER INST NUTRITION PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0022-3166 J9 J NUTR JI J. Nutr. PD FEB PY 1993 VL 123 IS 2 SU S BP 459 EP 464 PG 6 WC Nutrition & Dietetics SC Nutrition & Dietetics GA KM528 UT WOS:A1993KM52800040 PM 8429404 ER PT J AU Vinsome, PKW Shook, GM AF Vinsome, P. K. W. Shook, G. M. TI Multi-purpose simulation SO JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING LA English DT Article AB Vinsome, P.K.W. and Shook, G.M., 1993. Multi-purpose simulation. J. Pet. Sci. Eng., 9: 29-38. The accumulated advances and unifications that have been made through the years now make it possible to include in one numerical simulator a whole variety of different simulation types. The overhead involved in doing this is very small, and it also greatly reduces the amount of simulator maintenance required. This paper describes the methods we have implemented to achieve this goal. C1 [Vinsome, P. K. W.] DYAD 88 Software Inc, Calgary, AB, Canada. [Shook, G. M.] Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA. RP Vinsome, PKW (reprint author), DYAD 88 Software Inc, Calgary, AB, Canada. FU U.S. Department of Energy, Office of Utility Technology, under DOE [DE-AC07-761D01570] FX Mike Shook's work is supported by the U.S. Department of Energy, Assistant Secretary of Conservation and Renewable Energy, Office of Utility Technology, under DOE Contract DE-AC07-761D01570. NR 12 TC 20 Z9 20 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-4105 J9 J PETROL SCI ENG JI J. Pet. Sci. Eng. PD FEB PY 1993 VL 9 IS 1 BP 29 EP 38 DI 10.1016/0920-4105(93)90026-B PG 10 WC Energy & Fuels; Engineering, Petroleum SC Energy & Fuels; Engineering GA V26TD UT WOS:000208567000004 ER PT J AU LI, DQ ZHANG, JD DOWBEN, PA GARRISON, K AF LI, DQ ZHANG, JD DOWBEN, PA GARRISON, K TI EVIDENCE FOR IMPERFECT FERROMAGNETIC COUPLING BETWEEN THE GD(0001) SURFACE AND THE BULK SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Letter ID GD; PHOTOEMISSION; STATE; ADLAYERS; FE(100) AB We have investigated ordered Gd(0001) films deposited on W(110) by spin-polarized photoemission at temperatures well below the Curie temperature. The gadolinium valence band including the 5d surface state, the 5d bulk, the 4f levels and the background exhibit considerable spin polarization along the same direction in the plane of the film, indicative of ferromagnetic coupling between the surface and the bulk. The 4f spin-polarized photoemission data provide strong evidence that the surface 4f polarization differs from the bulk 4f polarization for Gd(0001). We attribute the differences between surface and bulk polarizations to a component of magnetization normal to the surface in the surface magnetization which is not present in the bulk. Dilute amounts of contamination at the surface result in a more perfect ferromagnetic coupling between the surface and the bulk. C1 BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE,UPTON,NY 11973. RP LI, DQ (reprint author), SYRACUSE UNIV,DEPT PHYS,SYRACUSE,NY 13244, USA. NR 20 TC 25 Z9 25 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD FEB 1 PY 1993 VL 5 IS 5 BP L73 EP L76 DI 10.1088/0953-8984/5/5/002 PG 4 WC Physics, Condensed Matter SC Physics GA KL070 UT WOS:A1993KL07000002 ER PT J AU JONES, BK EMERY, AF MARBURGER, SJ AF JONES, BK EMERY, AF MARBURGER, SJ TI DESIGN AND ANALYSIS OF A TEST COUPON FOR FUSION-WELDING SO JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME LA English DT Article AB The objective of a weld coupon is to provide a simple test to determine the effects of different welding parameters and constraints on the final state of fusion welds. With such a test it will be possible to judge the performance of a particular weld under known states of temperature and external restraint. This paper describes the experiments and analyses performed on a thin coupon with a circular weld bead which was designed to simulate a typical manufacturing geometry. The temperatures and deformations measured in the experiments corresponded closely to those of the analyses. It was found that such a geometry provides a high degree of restraint regardless of the radius of the circular weld bead. Experimental and analytical stresses indicate that extensive yielding occurs throughout the coupon. C1 SANDIA NATL LABS,DIV PROC DEV & FABRICAT,LIVERMORE,CA 94550. RP JONES, BK (reprint author), UNIV WASHINGTON,DEPT MECH ENGN,SEATTLE,WA 98195, USA. NR 34 TC 1 Z9 1 U1 0 U2 0 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0094-9930 J9 J PRESS VESS-T ASME JI J. Press. Vessel Technol.-Trans. ASME PD FEB PY 1993 VL 115 IS 1 BP 38 EP 46 DI 10.1115/1.2929493 PG 9 WC Engineering, Mechanical SC Engineering GA KP829 UT WOS:A1993KP82900005 ER PT J AU MASRI, AR DIBBLE, RW BARLOW, RS AF MASRI, AR DIBBLE, RW BARLOW, RS TI RAMAN-RAYLEIGH SCATTERING MEASUREMENTS IN REACTING AND NONREACTING DILUTE 2-PHASE FLOWS SO JOURNAL OF RAMAN SPECTROSCOPY LA English DT Article ID TURBULENT NONPREMIXED FLAMES; METHANE; EXTINCTION AB Simultaneous space- and time-resolved measurements of scalars were made in reacting and non-reacting dilute, two-phase, jet flows of methanol. The spontaneous Raman-Rayleigh scattering technique was used to measure temperature and the concentrations of CH3OH, O2, N2, H-2, H2O, CO and CO2. In the reacting case, laser-induced fluorescence from the hydroxyl radical was jointly measured. The two-phase flow is formed at atmospheric pressure at the exit of an axisymmetric jet centered in a co-flowing stream of air. At the measurement location of ten fuel jet diameters downstream of the nozzle exit plane the volume percentage of liquid in the center of the jet is estimated at about 0.015%. The Rayleigh-scattered signal can only be used as a marker for the existence of liquid in the measurement volume as it is overwhelmed by Mie and possibly geometrical scattering from droplets. The methanol Raman signal from the liquid-gas mixture increases, mainly owing to the increase in the number density of molecules and the local field effect. Raman signals from other gaseous species are not affected by the existence of droplets in the measurement volume. Gas-phase temperature is obtained from the sum of the species number densities. The fluorescence from OH shows occasional unrealistic overshoots for rich mixtures, which indicates some interference due to the existence of droplets. C1 UNIV CALIF BERKELEY,DEPT MECH ENGN,BERKELEY,CA 94720. SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94550. RP MASRI, AR (reprint author), UNIV SYDNEY,DEPT MECH ENGN,SYDNEY,NSW 2006,AUSTRALIA. NR 22 TC 8 Z9 8 U1 0 U2 0 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0377-0486 J9 J RAMAN SPECTROSC JI J. Raman Spectrosc. PD FEB PY 1993 VL 24 IS 2 BP 83 EP 89 DI 10.1002/jrs.1250240205 PG 7 WC Spectroscopy SC Spectroscopy GA KN695 UT WOS:A1993KN69500004 ER PT J AU ELLIOTT, DC BAKER, EG BUTNER, RS SEALOCK, LJ AF ELLIOTT, DC BAKER, EG BUTNER, RS SEALOCK, LJ TI BENCH-SCALE REACTOR TESTS OF LOW-TEMPERATURE, CATALYTIC GASIFICATION OF WET INDUSTRIAL-WASTES SO JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article AB Bench-scale reactor tests are under way at Pacific Northwest Laboratory to develop a low temperature, catalytic gasification system. The system, licensed under the trade name Thermochemical Environmental Energy System (TEES(R)), is designed for to a wide variety of feedstocks ranging from dilute organics in water to waste sludges from food processing. The current research program is focused on the use of a continuous feed, tubular reactor. The catalyst is nickel metal on an inert support. Typical results show that feedstocks such as solutions of 2 percent para-cresol or 5 percent and 10 percent lactose in water or cheese whey can be processed to >99 percent reduction of chemical oxygen demand (COD) at a rate of up to 2 L/hr. The estimated residence time is less than 5 min at 360-degrees-C and 3000 psig, not including 1 to 2 min required in the preheating zone of the reactor. The liquid hourly space velocity has been varied from 1.8 to 2.9 L feedstock/L catalyst/hr depending on the feedstock. The product fuel gas contains 40 percent to 55 percent methane, 35 percent to 50 percent carbon dioxide, and 5 percent to 10 percent hydrogen with as much as 2 percent ethane, but less than 0.1 percent ethylene or carbon monoxide, and small amounts of higher hydrocarbons. The byproduct water stream carries residual organics amounting to less than 500 mg/L COD. RP ELLIOTT, DC (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 11 TC 8 Z9 9 U1 1 U2 9 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0199-6231 J9 J SOL ENERG-T ASME JI J. Sol. Energy Eng. Trans.-ASME PD FEB PY 1993 VL 115 IS 1 BP 52 EP 56 DI 10.1115/1.2930024 PG 5 WC Energy & Fuels; Engineering, Mechanical SC Energy & Fuels; Engineering GA KP697 UT WOS:A1993KP69700008 ER PT J AU PITZER, KS SHI, YW AF PITZER, KS SHI, YW TI THERMODYNAMICS OF CALCIUM-CHLORIDE IN HIGHLY CONCENTRATED AQUEOUS-SOLUTION AND IN HYDRATED CRYSTALS SO JOURNAL OF SOLUTION CHEMISTRY LA English DT Article DE CALCIUM CHLORIDE; ACTIVITY COEFFICIENT; OSMOTIC COEFFICIENT; THERMODYNAMICS ID ELECTROLYTE MIXTURES AB Measured values of the pressure of H2O over saturated solutions in equilibrium with the dihydrate, tetrahydrate or hexahydrate of CaCl2 are converted to osmotic coefficients and compared with literature values for solutions of smaller molality. It is found that the osmotic coefficient is constant, within the uncertainty,from about 7 mol-kg-1 to saturation al all temperatures from 25 to 100-degrees-C. From this simple approximation, the activity coefficient is calculated for high molalities and at saturation. By combination of these results with other established data, entropies and Gibbs energies of formation are calculated for the crystalline hydrates of CaCl2. C1 TIANJIN UNIV,DEPT CHEM,TIANJIN 30072,PEOPLES R CHINA. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP PITZER, KS (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. NR 13 TC 17 Z9 17 U1 1 U2 5 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0095-9782 J9 J SOLUTION CHEM JI J. Solut. Chem. PD FEB PY 1993 VL 22 IS 2 BP 99 EP 105 DI 10.1007/BF00650677 PG 7 WC Chemistry, Physical SC Chemistry GA KN427 UT WOS:A1993KN42700001 ER PT J AU BELL, JLS WESOLOWSKI, DJ PALMER, DA AF BELL, JLS WESOLOWSKI, DJ PALMER, DA TI THE DISSOCIATION QUOTIENTS OF FORMIC-ACID IN SODIUM-CHLORIDE SOLUTIONS TO 200-DEGREES-C SO JOURNAL OF SOLUTION CHEMISTRY LA English DT Article DE FORMIC ACID; METHANOIC ACID; DISSOCIATION CONSTANT; THERMODYNAMICS; POTENTIOMETRY; IONIC STRENGTH ID ELECTROLYTES; MEDIA; WATER; THERMODYNAMICS; IONIZATION; ANIONS AB The dissociation quotients of formic acid were measured potentiometrically from 25 to 200-degrees-C in NaCl solutions at ionic strengths of 0.1, 0.3 1.0, 3.0, and 5.0 mol-kg-1. The experiments were carried out in a concentration cell with hydrogen electrodes. The resulting molal acid dissociation quotients for formic acid, as well as a set of infinite dilution literature values and a calorimetrically-determined enthalpy of reaction, were fitted by an empirical equation involving an extended Debye Huckel term and seven adjustable parameters involving functions of temperature and ionic strength. This regressional analysis yielded the following thermodynamic quantities for 25-degrees-C: logK = -3.755 +/- 0.002, DELTAH-degrees = -0.09 +/- 0.15 kJ-mol-1, DELTAS-degrees = -72.2 +/- 0.5 J-K-1-mol-1, and DELTAC(p)-degrees = -147 +/- 4 J-K-1-mol-1. The isocoulombic form of the equilibrium constant is recommended for extrapolation to higher temperatures. C1 OAK RIDGE NATL LAB,DIV CHEM,BLDG 4500S,POB 2008,OAK RIDGE,TN 37831. NR 29 TC 26 Z9 26 U1 0 U2 2 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0095-9782 J9 J SOLUTION CHEM JI J. Solut. Chem. PD FEB PY 1993 VL 22 IS 2 BP 125 EP 136 DI 10.1007/BF00650679 PG 12 WC Chemistry, Physical SC Chemistry GA KN427 UT WOS:A1993KN42700003 ER PT J AU FOUREST, B BURY, R MORSS, LR HALLA, JM DAVID, F AF FOUREST, B BURY, R MORSS, LR HALLA, JM DAVID, F TI CONDUCTOMETRIC STUDIES OF DYCL3 IN DILUTE AQUEOUS-SOLUTION SO JOURNAL OF SOLUTION CHEMISTRY LA English DT Article DE CONDUCTIVITY; DY-3+ ION; ELECTROLYTE MIXTURES; HYDROLYSIS ID HYDRATED RADII; TRIVALENT LANTHANIDE; IONS; ELECTROMIGRATION AB The limiting conductivity of Dy3+(aq) has been determined for the first time by linear extrapolation of conductivity measured in dilute aqueous solutions of (DyCl3 + HCI) at 25-degrees-C as lambda-degrees(Dy3+ , aq) = (62.9 +/- 0.7) S-cm2-eq-1. A second set of conductivity measurements in dilute aqueous solutions of DyCl3 has given evidence of very slight hydrolysis of the cation, with a first hydrolysis constant of 6 x 10(-8) mol-dm-3 (pK = 7.2 +/- 0.5) calculated by applying the Onsager-Kim law of electrolyte mixtures. C1 UNIV PARIS 06,F-75230 PARIS 05,FRANCE. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. FAC SCI TECH MONASTIR,MONASTIR,TUNISIA. RP FOUREST, B (reprint author), INST PHYS NUCL,F-91406 ORSAY,FRANCE. NR 20 TC 1 Z9 1 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0095-9782 J9 J SOLUTION CHEM JI J. Solut. Chem. PD FEB PY 1993 VL 22 IS 2 BP 151 EP 162 DI 10.1007/BF00650681 PG 12 WC Chemistry, Physical SC Chemistry GA KN427 UT WOS:A1993KN42700005 ER PT J AU GERASIMOV, A AF GERASIMOV, A TI RESONANT RESPONSE OF A THERMALIZED ENSEMBLE OF NONLINEAR OSCILLATORS SO JOURNAL OF STATISTICAL PHYSICS LA English DT Article DE NONLINEAR RESONANCE; DISTRIBUTION FUNCTION; FOKKER-PLANCK EQUATION AB The analysis is carried out of the response of the center of gravity (dipole moment) of the distribution of noninteracting thermalized nonlinear oscillators to a sinusoidal driving force. Heat bath coupling is modeled by damping and noise. The driving is weak, but the frequency is resonant, so that there is a nonlinear resonance in the phase space. The response has a linear part that can be obtained from the perturbation analysis and a small nonlinear correction that is specific for the resonant structure. RP GERASIMOV, A (reprint author), UNIV RES ASSOC,FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60505, USA. NR 9 TC 0 Z9 0 U1 0 U2 0 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 FEB PY 1993 VL 70 IS 3-4 BP 939 EP 948 DI 10.1007/BF01053601 PG 10 WC Physics, Mathematical SC Physics GA KN561 UT WOS:A1993KN56100019 ER PT J AU CHAJES, MJ ROMSTAD, KM MCCALLEN, DB AF CHAJES, MJ ROMSTAD, KM MCCALLEN, DB TI ANALYSIS OF MULTIPLE-BAY FRAMES USING CONTINUUM MODEL SO JOURNAL OF STRUCTURAL ENGINEERING-ASCE LA English DT Article ID LATTICE STRUCTURES; BEAM-LIKE; TRUSSES AB An approximate method that can be used to determine displacements and member forces of multiple-bay frames is presented. The method utilizes simple continuum models. Finite-element representations of building frameworks resulting from continuum methodology require significantly fewer degrees of freedom than classical discrete finite-element models, which individually model each of the beam and column elements. As a result, the use of continuum models to analyze structures can result in considerable savings in terms of computational effort. This makes the method attractive for use in the analysis of large frames, especially during the preliminary design stage. This paper reviews the continuum methodology and presents a method for computing discrete element forces from the continuum element displacements. In determining element forces, the effects of deep-beam-type cross-sectional warping are approximated. Examples including the analysis of fixed- and pinned-base single- and multiple-bay plane frames illustrate the accuracy of the continuum analyses procedure. C1 UNIV CALIF DAVIS,DEPT CIVIL ENGN,DAVIS,CA 95616. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP CHAJES, MJ (reprint author), UNIV DELAWARE,DEPT CIVIL ENGN,137 DUPONT HALL,NEWARK,DE 19716, USA. NR 25 TC 9 Z9 9 U1 1 U2 3 PU ASCE-AMER SOC CIVIL ENGINEERS PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2398 SN 0733-9445 J9 J STRUCT ENG-ASCE JI J. Struct. Eng.-ASCE PD FEB PY 1993 VL 119 IS 2 BP 522 EP 546 DI 10.1061/(ASCE)0733-9445(1993)119:2(522) PG 25 WC Construction & Building Technology; Engineering, Civil SC Construction & Building Technology; Engineering GA KK553 UT WOS:A1993KK55300010 ER PT J AU NORRIS, AN WICKHAM, G AF NORRIS, AN WICKHAM, G TI ELASTIC HELMHOLTZ RESONATORS SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article AB The influence of wall elasticity on the response of a Helmholtz resonator is examined by analyzing the canonical case of a thin elastic spherical shell with a circular aperture subject to plane wave excitation. By neglecting the thickness of the wall and representing the elasticity via a ''thin shell'' theory the problem is reduced to one of solving an integral equation over the aperture for the polarization velocity, which is related to, but distinct from, the radial particle velocity of the fluid. The integral equation can be solved by asymptotic methods for small apertures, yielding closed-form expressions for the major resonator parameters. In general, wall compliance reduces the resonance frequency in comparison with an identically shaped rigid cavity. The Q value of the resonance is increased and the scattering strength of the cavity at resonance is enhanced by wall compliance. The asymptotic results are supported and supplemented by numerical calculations for thin steel shells in water. C1 IOWA STATE UNIV SCI & TECHNOL,INST PHYS RES & TECHNOL,AMES LAB,AMES,IA 50011. RP NORRIS, AN (reprint author), RUTGERS STATE UNIV,PISCATAWAY,NJ 08855, USA. OI Norris, Andrew/0000-0001-7577-3698 NR 25 TC 15 Z9 17 U1 0 U2 4 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 FEB PY 1993 VL 93 IS 2 BP 617 EP 630 DI 10.1121/1.405481 PG 14 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA KL820 UT WOS:A1993KL82000004 ER PT J AU MOLBURG, JC AF MOLBURG, JC TI THE UTILITY INDUSTRY RESPONSE TO TITLE .4. GENERATION MIX, FUEL CHOICE, EMISSIONS AND COSTS SO JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION LA English DT Article AB The Clean Air Act Amendments of 1990 incorporate, for the first time, provisions aimed specifically at the control of acid rain. These provisions restrict emissions of sulfur dioxide and oxides of nitrogen from electric power generating stations. The restrictions on sulfur dioxide take the form of an overall cap on the aggregate emissions from major generating plants, allowing substantial flexibility in the industry's response to those restrictions. This report describes one response scenario through the year 2030, which was examined by simulation of the utility industry under assumptions consistent with a reference case that was used for analysis of the National Energy Strategy. Emissions that would result from the use of existing and new capacity and the associated additional costs of meeting demand subject to the emission limitations imposed by the Clean Air Act are projected. Fuel use effects, including coal market shifts, consistent with the response scenario are also described. These results, while dependent on specific assumptions for this scenario, provide insight into the general character of the likely utility industry response to Title IV. RP MOLBURG, JC (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 8 TC 4 Z9 4 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 FEB PY 1993 VL 43 IS 2 BP 180 EP 186 PG 7 WC Engineering, Environmental; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA KM952 UT WOS:A1993KM95200002 ER PT J AU APTE, MG TRAYNOR, GW AF APTE, MG TRAYNOR, GW TI POLLUTANT EMISSION RATES FROM A RADIANT FIBER-MATRIX GAS-BURNER SO JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION LA English DT Note RP APTE, MG (reprint author), LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,INDOOR ENVIRONM PROGRAM,BERKELEY,CA 94720, USA. NR 6 TC 0 Z9 0 U1 0 U2 1 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 FEB PY 1993 VL 43 IS 2 BP 223 EP 225 PG 3 WC Engineering, Environmental; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA KM952 UT WOS:A1993KM95200009 ER PT J AU JERVIS, TR NASTASI, M HUBBARD, KM HIRVONEN, JP AF JERVIS, TR NASTASI, M HUBBARD, KM HIRVONEN, JP TI EXCIMER-LASER SURFACE PROCESSING OF CERAMICS - PROCESS AND PROPERTIES SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article; Proceedings Paper CT 94TH ANNUAL MEETING OF THE AMERICAN CERAMIC SOC CY APR 12-16, 1992 CL MINNEAPOLIS, MN SP AMER CERAM SOC ID NICKEL OVERLAYERS; SILICON-CARBIDE; IMPLANTATION; TRIBOLOGY AB Surface modification of ceramics has proved to be of benefit in a number of applications. Excimer laser light provides a rapid and efficient means for surface alloying and modification of ceramic materials. The laser pulse can melt the surface of the ceramic as well as a deposited metal layer. This results in diffusional mixing in the liquid state, which is followed by rapid resolidification. The high temperatures involved can overcome kinetic barriers to mixing found in ion beam experiments. Tribological measurements on surface treated materials show reduced friction and increased surface toughness. Increased fracture toughness in laser surface alloyed ceramics has also been observed. Excimer laser processes therefore may enable the use of ceramic materials in applications for which they are not now suitable. C1 LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545. RP JERVIS, TR (reprint author), LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545, USA. NR 32 TC 20 Z9 20 U1 0 U2 1 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 FEB PY 1993 VL 76 IS 2 BP 350 EP 355 DI 10.1111/j.1151-2916.1993.tb03791.x PG 6 WC Materials Science, Ceramics SC Materials Science GA LE277 UT WOS:A1993LE27700016 ER PT J AU ZALESKI, MA JERVIS, TR MAYER, JW AF ZALESKI, MA JERVIS, TR MAYER, JW TI TRIBOLOGY AND HARDNESS OF EXCIMER-LASER-PROCESSED TITANIUM LAYERS ON CUBIC ZIRCONIA SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID AISI-304 STAINLESS-STEEL; BEAM-MODIFIED CERAMICS; ION-BEAM; MECHANICAL-PROPERTIES; FRICTION; WEAR; FILMS; TI AB We have examined the wear and friction and surface hardness of excimer-laser-processed Ti layers on cubic zirconia substrates. The film exhibits a complex array of cracking following processing that is related to the crystallographic orientation of the substrate. The friction between the laser-processed layers and both steel and ruby pins is reduced by approximately one-third relative to that of untreated zirconia. In the untreated case, wear is characterized by pin wear and debris, whereas the laser-processed layer wears by film transfer to the pin. The surface hardness of the processed layer is lower than that of both the untreated zirconia and the deposited Ti film. Indentation tests indicate that the surface is brittle following processing. C1 CORNELL UNIV,DEPT MAT SCI & ENGN,ITHACA,NY 14853. LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. NR 20 TC 7 Z9 8 U1 0 U2 2 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 FEB PY 1993 VL 76 IS 2 BP 356 EP 361 DI 10.1111/j.1151-2916.1993.tb03792.x PG 6 WC Materials Science, Ceramics SC Materials Science GA LE277 UT WOS:A1993LE27700017 ER PT J AU FAHRENHOLTZ, WG SMITH, DM CESARANO, J AF FAHRENHOLTZ, WG SMITH, DM CESARANO, J TI EFFECT OF PRECURSOR PARTICLE-SIZE ON THE DENSIFICATION AND CRYSTALLIZATION BEHAVIOR OF MULLITE SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article; Proceedings Paper CT 94TH ANNUAL MEETING OF THE AMERICAN CERAMIC SOC CY APR 12-16, 1992 CL MINNEAPOLIS, MN SP AMER CERAM SOC ID DIPHASIC ALUMINOSILICATE GELS; MECHANICAL-PROPERTIES; PHASE; COMPOSITES; CERAMICS AB Stoichiometric mullite, 3Al2O3.2SiO2, has been prepared from a variety of colloidal and solution precursors. In order to change the level of mixing, the size of the silica particles has been varied while keeping the alumina (boehmite) particle size constant. The effect of varying particle size on the crystallization and densification behavior has been studied. Densification behavior was characterized by measuring the bulk density of pellets as a function of heat treatment temperature and by dilatometry. Phase development was examined by thermal analysis and X-ray diffraction. Results showed that the formation of crystalline phases including mullite inhibited densification. The formation of mullite was controlled by the initial segregation of alumina and silica in the gel. A heat treatment time-temperature profile designed to optimize the densification of the colloidal powders was investigated in order to compare the ability of the different gels to densify. C1 SANDIA NATL LABS,DIV INORGAN MAT CHEM,ALBUQUERQUE,NM 87185. RP FAHRENHOLTZ, WG (reprint author), UNIV NEW MEXICO,NSF CTR MICROENGINEERED CERAM,ALBUQUERQUE,NM 87131, USA. OI Fahrenholtz, William/0000-0002-8497-0092 NR 27 TC 24 Z9 24 U1 0 U2 1 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 FEB PY 1993 VL 76 IS 2 BP 433 EP 437 DI 10.1111/j.1151-2916.1993.tb03802.x PG 5 WC Materials Science, Ceramics SC Materials Science GA LE277 UT WOS:A1993LE27700027 ER PT J AU SMITH, SM SINGH, JP SCATTERGOOD, RO AF SMITH, SM SINGH, JP SCATTERGOOD, RO TI PROCESSING AND CHARACTERIZATION OF SIC-WHISKER-REINFORCED ALUMINA-MATRIX COMPOSITES SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID TOUGHENING BEHAVIOR; CRACK DEFLECTION; SILICON-CARBIDE; CERAMICS AB Brittle monolithic alumina can be reinforced with high-strength single-crystal SiC whiskers with the effect of increasing fracture toughness. In this study, well-mixed and nearly fully dense SiC whisker/alumina composites were fabricated by wet-blending the constituents and uniaxially hot-pressing the resulting powder. The alumina-matrix grain size depended on whisker volume fraction, whisker surface-oxygen content, and hot-pressing environment. Fracture toughness, measured by an indentation-fracture method, increased from 3.0 MPa.m1/2 for the hot-pressed unreinforced alumina to 10.7 MPa.m1/2 for the composite containing 25 vol% SiC whiskers. Fracture surfaces revealed evidence of toughening by the mechanisms of crack deflection, pullout, and crack bridging by the whiskers. The observed increase in fracture toughness of alumina due to the addition of SiC whiskers was correlated with existing models of toughening mechanisms. C1 N CAROLINA STATE UNIV,DEPT MAT SCI & ENGN,RALEIGH,NC 27695. RP SMITH, SM (reprint author), ARGONNE NATL LAB,DIV MAT & COMPONENTS TECHNOL,ARGONNE,IL 60439, USA. RI Scattergood, Ronald/D-5204-2009 NR 21 TC 28 Z9 28 U1 0 U2 1 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 FEB PY 1993 VL 76 IS 2 BP 497 EP 502 DI 10.1111/j.1151-2916.1993.tb03813.x PG 6 WC Materials Science, Ceramics SC Materials Science GA LE277 UT WOS:A1993LE27700038 ER PT J AU AJAYI, OO ERDEMIR, A LEE, RH NICHOLS, FA AF AJAYI, OO ERDEMIR, A LEE, RH NICHOLS, FA TI SLIDING WEAR OF SILICON-CARBIDE TITANIUM BORIDE CERAMIC-MATRIX COMPOSITE SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID MECHANICAL-PROPERTIES; FRICTION; BEHAVIOR; WHISKER AB The tribological behavior of a SiC-TiB2 ceramic-matrix composite was evaluated using a pin-on-flat contact configuration in reciprocating sliding. A steady-state friction coefficient of about 0.55 and an average specific wear rate of about 2 x 10(-6) mm3.N-1.m-1 were measured. The mechanisms of material removal involved failure of the particle-matrix interface, resulting in particle pullout and chipping of the matrix material. The generated wear debris was often recycled through the contact interface, resulting in the production of submicrometer fine particles that reattached to the surface and were later removed in flake form. Transitions were observed in the specific wear rate from higher to lower values as sliding progressed. These transitions were accompanied by transitions in the nominal contact pressure. RP AJAYI, OO (reprint author), ARGONNE NATL LAB, DIV MAT & COMPONENTS TECHNOL DIV, ARGONNE, IL 60439 USA. NR 26 TC 15 Z9 15 U1 0 U2 1 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0002-7820 EI 1551-2916 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD FEB PY 1993 VL 76 IS 2 BP 511 EP 517 DI 10.1111/j.1151-2916.1993.tb03815.x PG 7 WC Materials Science, Ceramics SC Materials Science GA LE277 UT WOS:A1993LE27700040 ER PT J AU ADLER, TC MCLARNON, FR CAIRNS, EJ AF ADLER, TC MCLARNON, FR CAIRNS, EJ TI LOW-ZINC-SOLUBILITY ELECTROLYTES FOR USE IN ZINC NICKEL-OXIDE CELLS SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID HYDROXIDE; KOH AB Novel electrolytes, prepared by substituting KF and K2CO3 for a portion of the KOH traditionally used in Zn/KOH/NiOOH cells, were investigated in order to determine their effect on the rate of Zn active material redistribution (shape change) and Zn/NiOOH cell cycle-life performance. The solubilities of Zn species in these electrolytes are 20-25% of the Zn solubility in strongly alkaline [approximately 30 weight percent (w/o)] electrolytes. The rate of Zn electrode shape change was significantly less than that in cells with KOH, KOH-KF, or KOH-K2CO3 electrolytes. Vented cells constructed with KOH-KF electrolytes showed capacity-loss rates as low as 0.07%/cycle, which may be compared to values of 0.4-0.5%/cycle in cells with approximately 30 w/o KOH electrolyte. A sealed cell constructed with the novel KOH-KF-K2CO3 electrolyte showed a capacity-loss rate of 0.09%/cycle, and exhibited no dendritic shorts after 575 cycles at 100% depth of discharge. C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. RP ADLER, TC (reprint author), LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,BERKELEY,CA 94720, USA. RI Cairns, Elton/E-8873-2012 OI Cairns, Elton/0000-0002-1179-7591 NR 17 TC 50 Z9 54 U1 3 U2 15 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 FEB PY 1993 VL 140 IS 2 BP 289 EP 294 DI 10.1149/1.2221039 PG 6 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA KL863 UT WOS:A1993KL86300005 ER PT J AU DEMAREE, JD WAS, GS SORENSEN, NR AF DEMAREE, JD WAS, GS SORENSEN, NR TI CHEMICAL AND STRUCTURAL EFFECTS OF PHOSPHORUS ON THE CORROSION BEHAVIOR OF ION-BEAM MIXED FE-CR-P ALLOYS SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID METALLOID METALLIC GLASSES; AMORPHOUS IRON-ALLOYS; PASSIVE FILMS; CHEMISTRY; AUGER AB Ion beam mixing has been used to produce a variety of thin films of Fe-Cr-P metallic glasses to study the relative importance of alloy chemistry and amorphicity on the corrosion resistance of those alloys. Films of Fe-10Cr-xP [0 less-than-or-equal-to x less-than-or-equal-to 35 atom percent (a/o)] were produced by multilayer evaporation of iron, chromium, and iron phosphide, and ion beam mixed to homogenize the layers and induce the amorphous phase transformation. Films with 25 and 35 a/o phosphorus were entirely amorphous, films with 15 a/o were mixtures of crystalline and amorphous phases, and films with 0 and 8 a/o were entirely crystalline (P in solid solution bcc Fe-Cr). The amorphous films were devitrified by heat-treating. The alloy films produced in this study exhibited remarkable corrosion resistance in sulfuric acid solutions, with and without chloride additions. The addition of large amounts of phosphorus to Fe-10Cr lowered the passive current density by nearly two orders of magnitude. The active dissolution regime was eliminated by the addition of phosphorus, lowering the open-circuit corrosion rate by four orders of magnitude, primarily by suppressing the anodic dissolution reaction. Devitrification of the amorphous phase had no significant effect on the corrosion behavior of the resistant alloys. Examination of the passive oxides by x-ray photoelectron spectroscopy indicated that the presence of phosphorus increased chromium enrichment in the passive oxide, but that the major mechanism of protection was the development of a phosphate-rich oxide which may act as a chemical shield to prevent anodic dissolution of the underlying metal. C1 UNIV MICHIGAN,DEPT NUCL ENGN,ANN ARBOR,MI 48109. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 35 TC 10 Z9 10 U1 0 U2 2 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 FEB PY 1993 VL 140 IS 2 BP 331 EP 343 DI 10.1149/1.2221047 PG 13 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA KL863 UT WOS:A1993KL86300013 ER PT J AU PILLAY, B NEWMAN, J AF PILLAY, B NEWMAN, J TI MODELING DIFFUSION AND MIGRATION IN DILUTE ELECTROCHEMICAL SYSTEMS USING THE QUASI-POTENTIAL TRANSFORMATION SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID DISK AB The quasi-potential transformation, based on the Kirchhoff transformation, simplifies the equations governing mass transfer in steady-state, nonconvective electrolytic systems. The major assumption is that the species concentrations can be written as single-valued functions of the electrostatic potential. Methods are developed, based on a theorem presented by Gibbs, to solve the system-specific calculations, those calculations that are dependent only on the specific chemical system used. Results are presented for the binary aqueous copper sulfate system with variable transport properties and for the acidic aqueous copper sulfate system accounting for variations in the dissociation constant of the bisulfate ions. These results are combined with solutions of Laplace's equation for some simple boundary conditions to give complete solutions for the disk and hemisphere electrodes. The effect of migration on limiting currents is discussed. C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. RP PILLAY, B (reprint author), LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720, USA. RI Newman, John/B-8650-2008 OI Newman, John/0000-0002-9267-4525 NR 16 TC 31 Z9 31 U1 3 U2 9 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 FEB PY 1993 VL 140 IS 2 BP 414 EP 420 DI 10.1149/1.2221060 PG 7 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA KL863 UT WOS:A1993KL86300026 ER PT J AU MAYER, ST PEKALA, RW KASCHMITTER, JL AF MAYER, ST PEKALA, RW KASCHMITTER, JL TI THE AEROCAPACITOR - AN ELECTROCHEMICAL DOUBLE-LAYER ENERGY-STORAGE DEVICE SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID GLASSY-CARBON; ORGANIC AEROGELS; SURFACE; ELECTRODES AB We have applied unique types of carbon foams developed at Lawrence Livermore National Laboratory to make an ''Aerocapacitor.'' The aerocapacitor is a high power-density, high energy-density, electrochemical double-layer capacitor which uses carbon aerogels as electrodes. These electrodes possess very high surface area per unit volume and are electrically continuous in both the carbon and electrolyte phase on a 10 nm scale. Aerogel surface areas range from 100 to 700 m2/cm3 (as measured by BET analysis), with bulk densities of 0.3-1.0 g/cm3. This morphology permits stored energy to be released rapidly, resulting in high power densities (7.5 kW/kg). Materials parameterization has been performed, and device capacitances of several tens of Farads per gram and per cm3 of aerogel have been achieved. RP MAYER, ST (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 24 TC 310 Z9 339 U1 8 U2 71 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 FEB PY 1993 VL 140 IS 2 BP 446 EP 451 DI 10.1149/1.2221066 PG 6 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA KL863 UT WOS:A1993KL86300032 ER PT J AU WEITSMAN, Y ZHU, H AF WEITSMAN, Y ZHU, H TI MULTI-FRACTURE OF CERAMIC COMPOSITES SO JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS LA English DT Article ID MATRIX COMPOSITES; FIBER; TOUGHNESS; STRENGTH AB THIS WORK presents a mechanistic model for the multi-fracture process of uniaxially reinforced fibrous ceramic composites under monotonically increasing tension parallel to the fiber direction. The model employs an energy criterion to account for the progression of matrix cracks, bridged by intact fibers, and Weibull failure statistics to relate the failure of the fibers. Consideration is given to the interactions between the foregoing failure processes as well as to the effects of various material parameters on the response of the composite. C1 OAK RIDGE NATL LAB,DIV ENGN TECHNOL,OAK RIDGE,TN 37831. RP WEITSMAN, Y (reprint author), UNIV TENNESSEE,DEPT ENGN SCI & MECH,KNOXVILLE,TN 37996, USA. NR 24 TC 39 Z9 40 U1 0 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-5096 J9 J MECH PHYS SOLIDS JI J. Mech. Phys. Solids PD FEB PY 1993 VL 41 IS 2 BP 351 EP 388 DI 10.1016/0022-5096(93)90012-5 PG 38 WC Materials Science, Multidisciplinary; Mechanics; Physics, Condensed Matter SC Materials Science; Mechanics; Physics GA KK034 UT WOS:A1993KK03400006 ER PT J AU MATSUDA, M BIRGENEAU, RJ CHOU, H ENDOH, Y KASTNER, MA KOJIMA, H KURODA, K SHIRANE, G TANAKA, I YAMADA, K AF MATSUDA, M BIRGENEAU, RJ CHOU, H ENDOH, Y KASTNER, MA KOJIMA, H KURODA, K SHIRANE, G TANAKA, I YAMADA, K TI LOW-ENERGY SPIN FLUCTUATIONS IN LA2-XSRXCU1-YZNYO4 (X=0.14, Y=0.012) SO JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN LA English DT Letter DE HIGH-TC OXIDE SUPERCONDUCTOR; IMPURITY EFFECT; NEUTRON SCATTERING; SPIN DYNAMICS ID MAGNETIC EXCITATIONS; NEUTRON-SCATTERING; TEMPERATURE AB Neutron scattering experiments have been performed to study the dynamic spin properties of single-crystal La1.86Sr0.14Cu0.988 Zn0.012O4 (T(C)= 16 K). The width of S (Q, omega) in momentum space decreases at low omega and at low temperatures. The intensity at low energies at the incommensurate peak position (pi(1-delta), pi)) shows a broad maximum as a function of temperature around the superconducting transition temperature T(C). This behavior is qualitatively similar to that observed by Thurston et al. in La1.85, Sr0.15 CuO4 (T(C) = 33 K). C1 MIT, DEPT PHYS, CAMBRIDGE, MA 02139 USA. BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA. YAMANASHI UNIV, FAC ENGN, INST INORGAN SYNTHESIS, KOFU, YAMANASHI 400, JAPAN. RP TOHOKU UNIV, DEPT PHYS, SENDAI, MIYAGI 980, JAPAN. RI Yamada, Kazuyoshi/C-2728-2009; Tanaka, Isao/D-1519-2012; Matsuda, Masaaki/A-6902-2016 OI Matsuda, Masaaki/0000-0003-2209-9526 NR 17 TC 19 Z9 19 U1 0 U2 1 PU PHYSICAL SOC JAPAN PI TOKYO PA YUSHIMA URBAN BUILDING 5F, 2-31-22 YUSHIMA, BUNKYO-KU, TOKYO, 113-0034, JAPAN SN 0031-9015 J9 J PHYS SOC JPN JI J. Phys. Soc. Jpn. PD FEB PY 1993 VL 62 IS 2 BP 443 EP 446 DI 10.1143/JPSJ.62.443 PG 4 WC Physics, Multidisciplinary SC Physics GA KT150 UT WOS:A1993KT15000016 ER PT J AU WHELTON, BD MORETTI, ES PETERSON, DP BHATTACHARYYA, MH AF WHELTON, BD MORETTI, ES PETERSON, DP BHATTACHARYYA, MH TI CD-109 METABOLISM IN MICE .1. ORGAN RETENTION IN MICE FED A NUTRITIONALLY SUFFICIENT DIET DURING SUCCESSIVE ROUNDS OF GESTATION AND LACTATION SO JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH LA English DT Article ID GASTROINTESTINAL ABSORPTION; IRON-DEFICIENCY; RATS; EXPOSURE; CALCIUM AB Organ retention of Cd-109 was studied in multiparous and virgin female mice provided tracer amounts of Cd-109 in drinking water and stable Cd appropriate for the itai-itai experience in an otherwise nutrient replete solid diet. Breeder females maximally experienced 6 consecutive, 42-d rounds of gestation/lactation. On a round-by-round basis, breeder organ Cd-109 content and concentration values were compared with those from their time-matched virgin controls. By the end of round 5, the Cd-109 contents of some organs appeared to have plateaued in consecutive breeders. Comparing breeder with control values at that point, the following increases were observed. whole body (minus gastrointestinal tract), 4.7-fold, mammary tissue, 14.1-fold; liver 5.9-fold; and kidney, 3.8-fold. For Cd-109 concentrations, analogous increases were mammary tissue, 15.3-fold; liver, 4.0-fold, and kidney, 2.4-fold. Through the six rounds, a temporal shift in fractional Cd-109 distribution was noted for breeder tissues where transfer occurred from those of the mammaries, remaining carcass, and liver to the kidneys. In spite of this shift, at the end of round 6 Cd-109 content in hepatic tissue still exceeded that in renal tissue; however, Cd-109 concentration was 3.3-fold greater in the kidneys. For virgin female mice over the same period, a relatively smaller shift was observed from remaining carcass to kidneys. Unlike breeders, Cd-109 content was identical in hepatic and renal tissues, while Cd-109 concentration was 4.6-fold greater in the kidneys. With respect to renal Cd-109 increases, the larger portion of these shifts had occurred by the end of round 2 for virgin mice and by the end of round 6 for breeder mice. Comparison of content and concentration measures for a single, time-matched, virgin male group with those from a virgin female group at the end of round 6 revealed distinguishable differences only for the mammary tissues; by either measure these were about threefold higher in the female one. C1 ARGONNE NATL LAB,DIV BIOL & MED RES,ENVIRONM HLTH SECT,ARGONNE,IL 60439. RP WHELTON, BD (reprint author), EASTERN WASHINGTON UNIV,DEPT CHEM & BIOCHEM,MS 74,CHENEY,WA 99004, USA. NR 19 TC 6 Z9 6 U1 0 U2 0 PU TAYLOR & FRANCIS PI BRISTOL PA 1900 FROST ROAD, SUITE 101, BRISTOL, PA 19007-1598 SN 0098-4108 J9 J TOXICOL ENV HEALTH JI J. Toxicol. Environ. Health PD FEB PY 1993 VL 38 IS 2 BP 115 EP 129 PG 15 WC Environmental Sciences; Public, Environmental & Occupational Health; Toxicology SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Toxicology GA KM835 UT WOS:A1993KM83500002 PM 8433397 ER PT J AU WHELTON, BD MORETTI, ES PETERSON, DP BHATTACHARYYA, MH AF WHELTON, BD MORETTI, ES PETERSON, DP BHATTACHARYYA, MH TI CD-109 METABOLISM IN MICE .2. ORGAN RETENTION IN MICE FED A NUTRITIONALLY DEFICIENT DIET DURING SUCCESSIVE ROUNDS OF GESTATION AND LACTATION SO JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH LA English DT Article ID RATS; ABSORPTION; CALCIUM; BONE AB Organ retention of Cd-109 was studied in multiparous and virgin female mice provided trace amounts of Cd-109 in drinking water and stable Cd as well as certain nutrient minerals, vitamins, and fat all apportioned in solid diet in amounts appropriate for the itai-itai experience. Breeder females maximally experienced 4 nonconsecutive rounds of gestation/lactation in a total of 5 such 42-d periods. On a round-by-round basis, breeder organ Cd-109 content and concentration values were compared with those from their time-matched virgin controls. By the end of round 5, most organ Cd-109 content values in breeders were still increasing. Relative to control values at that point, the following increases were observed. whole body (minus gastrointestinal tract), 4.7-fold; mammary tissue, 12.5-fold, liver, 4.7-fold, and kidney, 4.8-fold. Analogous increases in Cd-109 concentration values were mammary tissue, 9.8-fold; liver, 2.8-fold, and kidney, 2.9-fold. Through the five rounds, a temporal shift in fractional Cd distribution was noted for breeder tissues where transfer occurred from those of the mammaries and remaining carcass to kidneys. Although by the end of the period Cd-109 content in the liver still exceeded that in the kidneys, Cd-109 concentration was 4.7-fold greater in renal tissues-an increase not matched by other breeder females consuming nutrient-replete rather than nutrient-deficient (itai-itai) diet. For virgin female mice over the same period, a shift of similar magnitude was observed from remaining carcass to kidneys. Not unlike the breeders, hepatic Cd-109 content again exceeded that in renal tissues, while Cd-109 concentration was 4.5-fold greater in the kidneys. With respect to renal Cd-109 increases, the greater portion of these shifts had occurred by the end of round 3 for both breeder and virgin mice. Comparison of both content and concentration measures for a single, time-matched, virgin male group with those from a virgin female one at the end of round 3 showed only those tor mammary tissues to be distinguishable, and by either measure were about fourfold higher in the female group. C1 ARGONNE NATL LAB,DIV BIOL & MED RES,ENVIRONM HLTH SECT,ARGONNE,IL 60439. RP WHELTON, BD (reprint author), EASTERN WASHINGTON UNIV,DEPT CHEM & BIOCHEM,MS 74,CHENEY,WA 99004, USA. NR 14 TC 3 Z9 3 U1 0 U2 0 PU TAYLOR & FRANCIS PI BRISTOL PA 1900 FROST ROAD, SUITE 101, BRISTOL, PA 19007-1598 SN 0098-4108 J9 J TOXICOL ENV HEALTH JI J. Toxicol. Environ. Health PD FEB PY 1993 VL 38 IS 2 BP 131 EP 145 PG 15 WC Environmental Sciences; Public, Environmental & Occupational Health; Toxicology SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Toxicology GA KM835 UT WOS:A1993KM83500003 PM 8433398 ER PT J AU WHELTON, BD PETERSON, DP MORETTI, ES BHATTACHARYYA, MH AF WHELTON, BD PETERSON, DP MORETTI, ES BHATTACHARYYA, MH TI CD-109 METABOLISM IN MICE .3. ORGAN RETENTION IN MICE OVARIECTOMIZED AFTER EXPERIENCING MULTIPLE ROUNDS OF GESTATION AND LACTATION SO JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH LA English DT Article AB Organ retention of Cd-109 was studied in multiparous female mice 6 wk after ovariectomy or sham-control surgery. Females previously had experienced from three to five rounds of gestation/lactation during a maximum of 5 successive, 42-d reproductive periods. Throughout the experiment, mice were provided with tracer amounts of Cd-109 in drinking water as well as stable Cd appropriate for the itai-itai experience in solid diets otherwise sufficient or deficient in nutrient quality For sufficient-diet females, organ Cd-109 content and concentration values were somewhat lower in the ovariectomized group compared to the sham control group. For deficient-diet females, the opposite trend occurred. When ovariectomized groups were compared with round 5 breeder groups of the same dietary experience, in almost all instances organ Cd-109 content and concentration values were lower in the ovariectomized animals. Exceptions to this trend occurred in hepatic and especially renal tissues, where Cd-109 concentrations were higher in the deficient-diet, ovariectomized group. Finally, when the deficient-diet, ovariectomized group was compared with its sufficient-diet counterpart, significantly higher Cd-109 content values were found for liver kidneys, and whole body (minus GI tract) in the former group. Conversely, when the same tissue content values were compared between the sham-control groups, differences without exception proved to be nonsignificant. C1 ARGONNE NATL LAB,DIV BIOL & MED RES,ENVIRONM HLTH SECT,ARGONNE,IL 60439. RP WHELTON, BD (reprint author), EASTERN WASHINGTON UNIV,DEPT CHEM & BIOCHEM,MS 74,CHENEY,WA 99004, USA. NR 10 TC 3 Z9 3 U1 0 U2 0 PU TAYLOR & FRANCIS PI BRISTOL PA 1900 FROST ROAD, SUITE 101, BRISTOL, PA 19007-1598 SN 0098-4108 J9 J TOXICOL ENV HEALTH JI J. Toxicol. Environ. Health PD FEB PY 1993 VL 38 IS 2 BP 147 EP 157 PG 11 WC Environmental Sciences; Public, Environmental & Occupational Health; Toxicology SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Toxicology GA KM835 UT WOS:A1993KM83500004 PM 8433399 ER PT J AU CASTNER, DG LEWIS, KB FISCHER, DA RATNER, BD GLAND, JL AF CASTNER, DG LEWIS, KB FISCHER, DA RATNER, BD GLAND, JL TI DETERMINATION OF SURFACE-STRUCTURE AND ORIENTATION OF POLYMERIZED TETRAFLUOROETHYLENE FILMS BY NEAR-EDGE X-RAY ABSORPTION FINE-STRUCTURE, X-RAY PHOTOELECTRON-SPECTROSCOPY, AND STATIC SECONDARY ION MASS-SPECTROMETRY SO LANGMUIR LA English DT Article ID SIMS AB Films of conventional and radio frequency glow discharge (RFGD) polymerized tetrafluoroethylene (TFE) were examined by ultrasoft X-ray absorption spectroscopy (XAS), X-ray photoelectron spectroscopy (XPS),and static secondary ion mass spectrometry (SIMS). The polarization-dependent intensity changes of transitions to C-C and C-F sigma* orbitals in the carbon and fluorine near-edge X-ray absorption fine structure (NEXAFS) spectra revealed different CF2 chain orientations. The surface region of skived poly(tetrafluoroethylene) (PTFE) was composed of CF2 chains oriented along the surface striations present in PTFE. XPS confirmed only CF2 groups were present in the PTFE surface region. Fluorocarbon (FC) films prepared by RFGD deposition of TFE onto substrates placed directly in the visible glow (TFE-I) were randomly oriented. XPS showed the TFE-I films had CF, CF2, and CF3 groups in the surface region. Static SIMS indicated that the TFE-I film surface contained CF3 and C2F5 groups. XPS showed the FC films prepared by RFGD deposition of TFE onto substrates placed downstream from the visible glow (TFE-II) contained approximately 90% CF2 groups. The strong polarization dependence of the C and F NEXAFS spectra of these films indicated the CF2 groups were aligned in vertical chains on the substrate. Static SIMS and XPS results suggested the outermost surface of the CF2 chains are terminated with CF3 groUPs. For thin (50-500 angstrom) FC RFGD films deposited onto polymeric substrates such as poly(methyl methacrylate) or poly(ethylene terephthalate), fluorescence yield detection XAS could be used to examine the substrate, while XPS, static SIMS, and electron yield detection XAS could be used to examine the FC overlayer. These results demonstrate the complementary nature of ultrasoft XAS, XPS, and static SIMS for detailed surface structural characterization of polymers. C1 UNIV WASHINGTON,CTR BIOENGN,SEATTLE,WA 98195. BROOKHAVEN NATL LAB,NATL INST STAND & TECHNOL PRT,UPTON,NY 11973. UNIV MICHIGAN,DEPT CHEM,ANN ARBOR,MI 48109. RP CASTNER, DG (reprint author), UNIV WASHINGTON,NATL ESCA & SURFACE ANAL CTR BIOMED PROBLEMS,DEPT CHEM ENGN,BF-10,SEATTLE,WA 98195, USA. NR 26 TC 90 Z9 90 U1 1 U2 16 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0743-7463 J9 LANGMUIR JI Langmuir PD FEB PY 1993 VL 9 IS 2 BP 537 EP 542 DI 10.1021/la00026a029 PG 6 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA KN160 UT WOS:A1993KN16000029 ER PT J AU MARKOVIC, N ROSS, PN AF MARKOVIC, N ROSS, PN TI EFFECT OF ANIONS ON THE UNDERPOTENTIAL DEPOSITION OF CU ON PT(111) AND PT(100) SURFACES SO LANGMUIR LA English DT Article ID PLATINUM-ELECTRODES; AUGER-SPECTROSCOPY; CRYSTAL-SURFACES; ADSORPTION; COPPER; LEED; ELECTROSORPTION; CHEMISTRY; ELECTROCHEMISTRY; HYDROGEN AB The effect of chloride and (bi)sulfate anions in the supporting acid electrolyte on the chemistry of underpotential deposition of Cu on Pt(lll) and Pt(100) single crystal surfaces was studied using a combination of electrochemical and nonelectrochemical techniques. The presence of these anions above a threshold concentration caused a splitting in the voltammetry peaks for Cu UPD on both Pt(lll) and Pt(100), with the second or split-off peak at a lower underpotential. This splitting was attributed to competition between the Cu adatoms and the adsorbed anions and the increase in thermodynamic driving force needed to displace the anions from the Pt substrate in order to form a Cu monolayer. The magnitude of the splitting appeared to be proportional to the relative strengths of the anion-Pt bonding, being larger for chloride than (bi)sulfate on either surface and being larger for the (100) surface than for the (111) surface for either anion. By the use of ex situ AES and LEED, we determined that in nearly ''Cl-free'' supporting electrolyte Cu appeared to be deposited at underpotential in metallic islands (or ''patches'') having the Pt lattice constant (pseudomorphic growth). In the presence of Cl- the Cu was deposited at underpotentials into a Cu-Cl adlattice. At the Nernst potential, however, in both ''Cl-free'' and Cl-containing electrolyte, Cu formed a uniform metallic monolayer having the Pt lattice constant, i.e. a pseudomorphic monolayer. C1 UNIV BELGRADE,ICTM,INST ELECTROCHEM,BELGRADE,YUGOSLAVIA. RP MARKOVIC, N (reprint author), LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720, USA. NR 38 TC 118 Z9 118 U1 0 U2 28 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0743-7463 J9 LANGMUIR JI Langmuir PD FEB PY 1993 VL 9 IS 2 BP 580 EP 590 DI 10.1021/la00026a037 PG 11 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA KN160 UT WOS:A1993KN16000037 ER PT J AU DAVIS, JI JACOBS, RR AF DAVIS, JI JACOBS, RR TI LIVERMORES CALEOT STRENGTHENS LASER INDUSTRY SO LASER FOCUS WORLD LA English DT Editorial Material C1 LAWRENCE LIVERMORE NATL LAB,CALEOT,LIVERMORE,CA 94550. RP DAVIS, JI (reprint author), LAWRENCE LIVERMORE NATL LAB,NEW TECHNOL INITIAT LASER PROGRAMS,LIVERMORE,CA 94550, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PENNWELL PUBL CO PI NASHUA PA 5TH FLOOR TEN TARA BOULEVARD, NASHUA, NH 03062-2801 SN 0740-2511 J9 LASER FOCUS WORLD JI Laser Focus World PD FEB PY 1993 VL 29 IS 2 BP 55 EP 56 PG 2 WC Optics SC Optics GA MC380 UT WOS:A1993MC38000018 ER PT J AU GUENTHER, AH AF GUENTHER, AH TI OPTICS DAMAGE CONSTRAINS LASER DESIGN AND PERFORMANCE SO LASER FOCUS WORLD LA English DT Editorial Material RP GUENTHER, AH (reprint author), SANDIA NATL LABS,DEPT LAB,ALBUQUERQUE,NM 87185, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PENNWELL PUBL CO PI NASHUA PA 5TH FLOOR TEN TARA BOULEVARD, NASHUA, NH 03062-2801 SN 0740-2511 J9 LASER FOCUS WORLD JI Laser Focus World PD FEB PY 1993 VL 29 IS 2 BP 83 EP & PG 0 WC Optics SC Optics GA MC380 UT WOS:A1993MC38000024 ER PT J AU PATTEN, TE NOVAK, BM AF PATTEN, TE NOVAK, BM TI ORGANOTITANIUM(IV) COMPOUNDS AS CATALYSTS FOR THE POLYMERIZATION OF ISOCYANATES - THE POLYMERIZATION OF ISOCYANATES WITH FUNCTIONALIZED SIDE-CHAINS SO MACROMOLECULES LA English DT Article ID 2-ISOCYANATOETHYL METHACRYLATE IEM; LIQUID-CRYSTALLINE POLYMERS; DENDRITIC MACROMOLECULES; CONVERGENT APPROACH; POLYISOCYANATES; REACTANT; SIZE AB Catalysts of the form CpTiCl2X, where X = -OCH2CF3, -N(CH3)2, or -CH3 (IIa, IIb, IIc; Cp = eta5-cyclopentadienyl), Cp*TiCl2OCH2CF3 (III; Cp* = eta5-pentamethylcyclopentadienyl), and Cp2TiClOCH2-CF3 (IV) were used to polymerize a variety of isocyanates. Titanium-alkoxide, -amide, and -alkyl bonds were all found to be active in initiating the insertion of isocyanate monomer. An advantageous consequence of the lesser Lewis acidity of IIa-c relative to TiCl3OCH2CF3 (I) is that the polymerization of highly functio monomers is possible using IIa-c and not I. 2-Isocyanatoethyl methacrylate (2IEM) was polymerized, IIb, through the isocyanato group to a linear polymer; the resulting properties of this material were found to be quite different from what was reported by Grabam et al.12 2IEM trimer was synthesized and subsequently cross-linked using a free-radical initiator, and it was found that the properties of this material matched those of the earlier report. The Diels-Alder adduct of 2IEM with cyclopentadiene, 2-((2-isocyanatoethoxy)carbonyl)-2-methylbicyclo[2.2.1]hept-5-ene (2IECMBH) was prepared and also polymerized using IIb. The use of cyclopentadienyltitanium trichloride derivatives also provides a general route through which a wide variety of end groups may be incorporated onto the end of the polyisocyanate chain. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,CTR ADV MAT,DIV MAT SCI,BERKELEY,CA 94720. NR 25 TC 75 Z9 77 U1 1 U2 13 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD FEB 1 PY 1993 VL 26 IS 3 BP 436 EP 439 DI 10.1021/ma00055a005 PG 4 WC Polymer Science SC Polymer Science GA KK470 UT WOS:A1993KK47000005 ER PT J AU ZHAO, W ZHAO, X RAFAILOVICH, MH SOKOLOV, J COMPOSTO, RJ SMITH, SD SATKOWSKI, M RUSSELL, TP DOZIER, WD MANSFIELD, T AF ZHAO, W ZHAO, X RAFAILOVICH, MH SOKOLOV, J COMPOSTO, RJ SMITH, SD SATKOWSKI, M RUSSELL, TP DOZIER, WD MANSFIELD, T TI SEGREGATION OF CHAIN ENDS TO POLYMER MELT SURFACES AND INTERFACES SO MACROMOLECULES LA English DT Article ID SIMULATIONS C1 CUNY QUEENS COLL, DEPT PHYS, FLUSHING, NY 11367 USA. UNIV PENN, DEPT MAT SCI, PHILADELPHIA, PA 19104 USA. PROCTER & GAMBLE CO, CINCINNATI, OH 45239 USA. ARGONNE NATL LAB, ARGONNE, IL 60439 USA. UNIV MASSACHUSETTS, AMHERST, MA 01003 USA. IBM CORP, DIV RES, ALMADEN RES CTR, SAN JOSE, CA 95120 USA. NR 9 TC 80 Z9 81 U1 4 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD FEB 1 PY 1993 VL 26 IS 3 BP 561 EP 562 DI 10.1021/ma00055a026 PG 2 WC Polymer Science SC Polymer Science GA KK470 UT WOS:A1993KK47000026 ER PT J AU WEBER, WJ TULLER, HL MASON, TO CORMACK, AN AF WEBER, WJ TULLER, HL MASON, TO CORMACK, AN TI RESEARCH NEEDS AND OPPORTUNITIES IN HIGHLY CONDUCTING ELECTROCERAMICS SO MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY LA English DT Review ID CHEMICAL VAPOR-DEPOSITION; GRAIN-BOUNDARY CHEMISTRY; AC LEAKAGE COMPONENTS; OXIDE-ION CONDUCTION; YB-DOPED SRCEO3; DEFECT STRUCTURE; STRONTIUM-TITANATE; COMPUTER-SIMULATION; SOLID ELECTROLYTES; CRYSTAL-STRUCTURES AB A workshop on Highly Conducting Electroceramics was held at Teton Village, Wyoming (USA) from July 9 to 13, 1990, under the auspices of the Division of Materials Sciences, Office of Basic Energy Sciences, US Department of Energy. The workshop covered emerging applications, new materials, the latest experimental observations, theory/modeling, and the current understanding related to electronic and ionic transport in ceramic materials. One of the major conclusions was that a better understanding of charge transport and reaction mechanisms at and along interfaces and boundaries is a critical research need. The highlights of the workshop are reviewed and recommendations are made for future research. C1 NORTHWESTERN UNIV, DEPT MAT SCI & ENGN, EVANSTON, IL 60208 USA. MIT, DEPT MAT SCI & ENGN, CAMBRIDGE, MA 02139 USA. ALFRED UNIV, NEW YORK STATE COLL CERAM, ALFRED, NY 14802 USA. RP WEBER, WJ (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. RI Mason, Thomas/B-7528-2009; Weber, William/A-4177-2008 OI Weber, William/0000-0002-9017-7365 NR 153 TC 15 Z9 15 U1 2 U2 9 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5107 J9 MAT SCI ENG B-SOLID JI Mater. Sci. Eng. B-Solid State Mater. Adv. Technol. PD FEB 1 PY 1993 VL 18 IS 1 BP 52 EP 71 DI 10.1016/0921-5107(93)90111-Y PG 20 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA KP580 UT WOS:A1993KP58000003 ER PT J AU LUDTKA, GM OAKES, RE BRIDGES, RL GRIFFITH, JL AF LUDTKA, GM OAKES, RE BRIDGES, RL GRIFFITH, JL TI AN INVESTIGATION OF SUPERPLASTICITY IN A THERMOMECHANICALLY PROCESSED U-2MO (ALPHA+DELTA) ALLOY SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article AB A uranium-2 molybdenum (U-2Mo) alloy was shown to exhibit superplastic behavior over the beta + gamma two-phase field temperature regime and over a limited temperature span in the alpha + gamma field. At Oak Ridge, two distinct processes were developed that evolved microstructures conducive to superplasticity. These microstructures were shown to exhibit superplasticity (elongations > 500 pct) over a broad range of strain rates, from 2.5 x 10(-4) to 1 x 10(-2) s-1. A maximum value of 700 pct elongation was reached at 695-degrees-C and a true constant strain rate of 2.5 x 10(-3) s-1. This study details the processing sequences, microstructures, strain-rate sensitivity, and maximum elongation data generated to characterize the superplastic U-2Mo alloy. In addition, the fracture and cavitation analyses conducted on constant strain-rate tensile test specimens are discussed. C1 MARTIN MARIETTA ENERGY SYST INC,OAK RIDGE,TN 37831. RP LUDTKA, GM (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 11 TC 2 Z9 3 U1 2 U2 3 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0360-2133 J9 METALL TRANS A PD FEB PY 1993 VL 24 IS 2 BP 369 EP 377 DI 10.1007/BF02657324 PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA KK981 UT WOS:A1993KK98100012 ER PT J AU LUDTKA, GM OAKES, RE MACKIEWICZLUDTKA, G BRIDGES, RL GRIFFITH, JL AF LUDTKA, GM OAKES, RE MACKIEWICZLUDTKA, G BRIDGES, RL GRIFFITH, JL TI AN INVESTIGATION OF SUPERPLASTICITY IN A THERMOMECHANICALLY PROCESSED U-6NB (ALPHA+GAMMA-2) ALLOY SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article AB A uranium-6 niobium alloy was shown to exhibit superplasticity. A thermomechanical processing (TMP) sequence was used to develop the ultrafine grain size essential for superplastic behavior. Strain-rate sensitivity, maximum elongation, and flow curve data indicated that this alloy is superplastic above the monotectoid temperature (647-degrees-C) in the equilibrium gamma1, single-phase, temperature regime. The existence of superplasticity in the single-phase temperature regime was explained by the presence of metastable gamma2 at these higher temperatures. Sluggish niobium diffusion and the resultant slow dissolution kinetics were shown to be responsible for this anomalous ''single-phase'' superplastic behavior. An engineering elongation of 658 pct was obtained at 685-degrees-C for a constant true strain rate of 2.5 x 10(-4) s-1, which required an initial flow stress of only 2.8 MPa. A grain growth kinetic study, along with flow curve information, has also shown that superplastic forming (SPF) must be completed within 2 hours at 670-degrees-C to obtain maximum ductility with the lowest forming pressure. C1 MARTIN MARIETTA ENERGY SYST INC,OAK RIDGE,TN 37831. RP LUDTKA, GM (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 10 TC 6 Z9 8 U1 0 U2 2 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0360-2133 J9 METALL TRANS A PD FEB PY 1993 VL 24 IS 2 BP 379 EP 388 DI 10.1007/BF02657325 PG 10 WC Materials Science, Multidisciplinary SC Materials Science GA KK981 UT WOS:A1993KK98100013 ER PT J AU BROWNLIE, RM BRAHMBHATT, HN WHITE, DC FOUNTAIN, MW ROHDE, M WEHLAND, J TIMMIS, KN AF BROWNLIE, RM BRAHMBHATT, HN WHITE, DC FOUNTAIN, MW ROHDE, M WEHLAND, J TIMMIS, KN TI STIMULATION OF SECRETORY ANTIBODIES AGAINST BORDETELLA-PERTUSSIS ANTIGENS IN THE LUNGS OF MICE AFTER ORAL OR INTRANASAL ADMINISTRATION OF LIPOSOME-INCORPORATED CELL-SURFACE ANTIGENS SO MICROBIAL PATHOGENESIS LA English DT Article DE BORDETELLA-PERTUSSIS; LIPOSOMES; VACCINE; OUTER-MEMBRANE PROTEINS; LIPOPOLYSACCHARIDE ID IMMUNOLOGICAL ADJUVANTS; POLYACRYLAMIDE GELS; PROTEIN; IMMUNIZATION; VARIANTS C1 CSIRO,MCMASTER LAB,PRIVATE BAG 1,GLEBE,NSW 2037,AUSTRALIA. GBF,NATL RES CTR BIOTECHNOL,DEPT MICROBIOL,BRAUNSCHWEIG,GERMANY. UNIV TENNESSEE,OAK RIDGE NATL LAB,INST APPL MICROBIOL,KNOXVILLE,TN 37932. FOUNTAIN PHARMACEUT INC,LARGO,FL 34643. NR 25 TC 13 Z9 14 U1 0 U2 1 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0882-4010 J9 MICROB PATHOGENESIS JI Microb. Pathog. PD FEB PY 1993 VL 14 IS 2 BP 149 EP 160 DI 10.1006/mpat.1993.1015 PG 12 WC Immunology; Microbiology SC Immunology; Microbiology GA LB715 UT WOS:A1993LB71500007 PM 8502163 ER PT J AU MENSAHBINEY, R HEPWORTH, MT REID, KJ AF MENSAHBINEY, R HEPWORTH, MT REID, KJ TI LOADING OF GOLD BROMO SPECIES ONTO ANION-EXCHANGE RESIN SO MINERALS ENGINEERING LA English DT Article DE GOLD-BROMO SPECIES; ANION EXCHANGE RESIN; ELUTION AB The loading characteristics of gold-bromo species onto an anion exchange resin were evaluated using a batch system. The observed apparent saturation capacity for gold-bromo species by the resin was found to be 64 meq Au/g dry resin (4000 kg Au/tonne resin), substantially higher than the salt-splitting capacity of 12.5 meq Cl/g. The overall extraction of gold onto the resin continues indefinitely (within the experimental range) so long as there is gold in solution, and it appears to be irreversible. Therefore equilibrium considerations were not of much use, but rate considerations were important. The loading capacity increased with increasing temperature and decreasing initial gold concentration in solution. The apparent saturation capacity was proportional to the ratio of mass of gold in solution to mass of adsorbent used. The correlation between the apparent saturation capacity and the ratio was described by an empirical linear equation. The mechanism for the loading of gold-bromo species onto the resin is postulated to consist of the initial adsorption of Au[Br4]- species by a simple ion exchange process and the reduction of ionic gold species to elemental Au0 by an electron exchange reduction reaction. Elution of gold from the loaded resin was feasible provided the resin had not been loaded to high capacity levels. If the gold loading is carried to high levels, complete elution becomes impractical and the gold may be recovered by ashing the loaded resin. The abnormally high loading capacity of the resin for gold may have potential economic benefits for the bromine process for gold recovery. C1 UNIV MINNESOTA,DEPT CIVIL & MINERAL ENGN,MINNEAPOLIS,MN 55455. RP MENSAHBINEY, R (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 10 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 0892-6875 J9 MINER ENG JI Miner. Eng. PD FEB PY 1993 VL 6 IS 2 BP 173 EP 191 DI 10.1016/0892-6875(93)90131-6 PG 19 WC Engineering, Chemical; Mineralogy; Mining & Mineral Processing SC Engineering; Mineralogy; Mining & Mineral Processing GA KA983 UT WOS:A1993KA98300005 ER PT J AU BUXTON, J DAVIES, J SHELBOURNE, P YOKOBATA, K WILLIAMSON, R JOHNSON, K AF BUXTON, J DAVIES, J SHELBOURNE, P YOKOBATA, K WILLIAMSON, R JOHNSON, K TI ISOLATION AND ORDERING OF BACTERIOPHAGE GENOMIC CLONES CORRESPONDING TO 2 YACS FROM 19Q13.3 SO MOLECULAR AND CELLULAR PROBES LA English DT Article DE BACTERIOPHAGE CONTIGS; CHROMOSOME-19; INTER-ALU PCR; YACS ID POLYMERASE CHAIN-REACTION; MYOTONIC-DYSTROPHY LOCUS; REPEATED SEQUENCES; YEAST; DNA; LIBRARIES; VECTORS C1 CHARING CROSS & WESTMINSTER MED SCH,DEPT ANAT,LONDON W6 8RF,ENGLAND. LAWRENCE LIVERMORE NATL LAB,DIV BIOMED SCI,LIVERMORE,CA 94404. ST MARYS HOSP,IMPERIAL COLL,SCH MED,DEPT BIOCHEM & MOLEC GENET,LONDON W2 1PG,ENGLAND. RI Buxton, Jessica/I-4033-2014 OI Buxton, Jessica/0000-0002-0918-9335 NR 22 TC 1 Z9 1 U1 0 U2 0 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0890-8508 J9 MOL CELL PROBE JI Mol. Cell. Probes PD FEB PY 1993 VL 7 IS 1 BP 75 EP 80 DI 10.1006/mcpr.1993.1010 PG 6 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Cell Biology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Cell Biology GA KN199 UT WOS:A1993KN19900010 PM 8455645 ER PT J AU WOLK, CP ELHAI, J KURITZ, T HOLLAND, D AF WOLK, CP ELHAI, J KURITZ, T HOLLAND, D TI AMPLIFIED EXPRESSION OF A TRANSCRIPTIONAL PATTERN FORMED DURING DEVELOPMENT OF ANABAENA SO MOLECULAR MICROBIOLOGY LA English DT Article ID BACTERIOPHAGE-T7 RNA-POLYMERASE; CYANOBACTERIUM ANABAENA; CLONING SITES; VECTORS; GENES; PLASMID; DIFFERENTIATION; HETEROCYSTS; SELECTION; SEQUENCE AB The cyanobacterium Anabaena responds to nitrogen deprivation by producing heterocysts, cells specialized for nitrogen fixation, at well-spaced intervals along its filaments. The gene hepA, required for heterocyst maturation, is expressed in response to nitrogen deprivation, prior to visible differentiation. A spatial pattern of hepA expression indistinguishable from the eventual pattern of heterocysts was made visible by fusing the hepA promoter to luxAB, which encodes bacterial luciferase. Because the resulting signal did not greatly exceed instrumental background, T7 RNA polymerase was used to increase luminescence. The hepA promoter was fused to the gene for that polymerase, and a promoter recognized by that polymerase was fused to luxAB. Filaments containing these two fusions showed spaced luminescing cells many hours before differentiation became discernible morphologically. RP WOLK, CP (reprint author), MICHIGAN STATE UNIV,DOE PLANT RES LAB,E LANSING,MI 48824, USA. NR 27 TC 48 Z9 50 U1 1 U2 4 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0950-382X J9 MOL MICROBIOL JI Mol. Microbiol. PD FEB PY 1993 VL 7 IS 3 BP 441 EP 445 DI 10.1111/j.1365-2958.1993.tb01135.x PG 5 WC Biochemistry & Molecular Biology; Microbiology SC Biochemistry & Molecular Biology; Microbiology GA KK976 UT WOS:A1993KK97600011 PM 8459770 ER PT J AU FINN, MG BAKER, JG AF FINN, MG BAKER, JG TI FUTURE JOBS IN NATURAL-SCIENCE AND ENGINEERING - SHORTAGE OR SURPLUS SO MONTHLY LABOR REVIEW LA English DT Note RP FINN, MG (reprint author), OAK RIDGE INST SCI & EDUC,DIV SCI ENGN EDUC,LAB & POLICY STUDIES PROGRAM,OAK RIDGE,TN, USA. NR 13 TC 1 Z9 1 U1 0 U2 0 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0098-1818 J9 MON LABOR REV JI Mon. Labor Rev. PD FEB PY 1993 VL 116 IS 2 BP 54 EP 61 PG 8 WC Industrial Relations & Labor SC Business & Economics GA KQ796 UT WOS:A1993KQ79600007 ER PT J AU PERLACK, RD AF PERLACK, RD TI DIAGNOSIS OF ENERGY-SYSTEMS IN DEVELOPING-COUNTRIES - GIROD,J SO NATURAL RESOURCES FORUM LA English DT Book Review RP PERLACK, RD (reprint author), OAK RIDGE NATL LAB,DIV ENERGY,OAK RIDGE,TN 37831, USA. NR 1 TC 0 Z9 0 U1 0 U2 3 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0165-0203 J9 NAT RESOUR FORUM PD FEB PY 1993 VL 17 IS 1 BP 67 EP 67 PG 1 WC Environmental Sciences; Environmental Studies SC Environmental Sciences & Ecology GA KW734 UT WOS:A1993KW73400008 ER PT J AU EDMONDS, J AF EDMONDS, J TI BUYING GREENHOUSE INSURANCE - THE ECONOMIC COSTS OF CO2 EMISSION LIMITS - MANNE,AS, RICHELS,RG SO NATURAL RESOURCES FORUM LA English DT Book Review RP EDMONDS, J (reprint author), PACIFIC NW LAB, 901 D ST SW, WASHINGTON, DC 20024 USA. NR 9 TC 0 Z9 0 U1 1 U2 1 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0165-0203 J9 NAT RESOUR FORUM PD FEB PY 1993 VL 17 IS 1 BP 71 EP 72 PG 2 WC Environmental Sciences; Environmental Studies SC Environmental Sciences & Ecology GA KW734 UT WOS:A1993KW73400012 ER PT J AU WHITFIELD, RP AF WHITFIELD, RP TI UNITED-STATES DOE CLEANUP PROGRAM - AN UPDATE SO NUCLEAR ENGINEERING INTERNATIONAL LA English DT Article RP WHITFIELD, RP (reprint author), US DOE,OFF ENVIRONM RESTORAT,WASHINGTON,DC 20585, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU REED BUSINESS PUBLISHING LTD PI SUTTON PA QUADRANT HOUSE THE QUADRANT, SUTTON, SURREY, ENGLAND SM2 5AS SN 0029-5507 J9 NUCL ENG INT JI Nucl. Eng. Int. PD FEB PY 1993 VL 38 IS 463 BP 25 EP 27 PG 3 WC Nuclear Science & Technology SC Nuclear Science & Technology GA KP443 UT WOS:A1993KP44300005 ER PT J AU JAEGER, EF BATCHELOR, DB STALLINGS, DC AF JAEGER, EF BATCHELOR, DB STALLINGS, DC TI INFLUENCE OF VARIOUS PHYSICS PHENOMENA ON FAST WAVE CURRENT DRIVE IN TOKAMAKS SO NUCLEAR FUSION LA English DT Article ID MODE CONVERSION; PLASMAS; PROPAGATION; EFFICIENCY AB The paper presents an analysis of the influence of various physics phenomena (which are not necessarily independent) on current drive performance in tokamaks. Such phenomena include diffraction and other non-geometrical optics processes, k(parallel-to) modification, and multiple-pass absorption as well as antenna characteristics such as recessed cavity and septa geometry, poloidal extent and poloidal location of the current straps. The two-and-one-half-dimensional (2 1/2-D) full-wave code PICES is used for modelling ion cyclotron resonance heating and current drive. PICES is based on poloidal mode and reduced-order expansions. By 2 1/2-D, we mean that 3-D wave fields are calculated in axisymmetric geometry (2-D solution domain -rho, theta), while the correct toroidal dependence of the antenna source currents is obtained from a 2-D (rho, phi) recessed antenna code. The calculation includes the poloidal and toroidal structure of the antenna, modification of the k(parallel-to) spectrum due to the poloidal magnetic field and a complete solution for E(parallel-to). A semi-analytic model for current drive, including trapped electron effects, is employed. These calculations are used extensively to model fast wave current drive in DIII-D, ITER and other tokamaks. RP JAEGER, EF (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 27 TC 38 Z9 40 U1 0 U2 0 PU INT ATOMIC ENERGY AGENCY PI VIENNA PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA SN 0029-5515 J9 NUCL FUSION JI Nucl. Fusion PD FEB PY 1993 VL 33 IS 2 BP 179 EP 195 DI 10.1088/0029-5515/33/2/I01 PG 17 WC Physics, Fluids & Plasmas SC Physics GA KV459 UT WOS:A1993KV45900001 ER PT J AU BERK, HL COHEN, RH RYUTOV, DD TSIDULKO, YA XU, XQ AF BERK, HL COHEN, RH RYUTOV, DD TSIDULKO, YA XU, XQ TI ELECTRON-TEMPERATURE GRADIENT INDUCED INSTABILITY IN TOKAMAK SCRAPE-OFF LAYERS SO NUCLEAR FUSION LA English DT Article ID HELMHOLTZ VORTEX FORMATION; FIELD PLASMA SHEATH; PARTICLE-TRANSPORT; TURBULENCE; DIVERTOR; MODEL AB An electron temperature instability driven by the Kunkel-Guillory sheath impedance has been applied to the scrape-off layer of tokamaks. The formalism has been generalized in order to more fully account for parallel wavelength dynamics, to differentiate between electromagnetic and electrostatic perturbations and to account for particle recycling effects. It is conjectured that this conducting wall instability leads to edge fluctuations in tokamaks that produce scrape-off layers tens of ion gyroradii thick. The predicted instability characteristics have similarities to experimental edge fluctuation data, and the scrape-off layer width in the DIII-D experiment agrees with theoretical estimates that can be derived from mixing length theory. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. BUDKER INST NUCL PHYS,NOVOSIBIRSK,RUSSIA. UNIV CALIF BERKELEY,DEPT ELECT ENGN,BERKELEY,CA 94720. RP BERK, HL (reprint author), UNIV TEXAS,INST FUS STUDIES,AUSTIN,TX 78712, USA. NR 26 TC 74 Z9 74 U1 4 U2 10 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 FEB PY 1993 VL 33 IS 2 BP 263 EP 282 DI 10.1088/0029-5515/33/2/I07 PG 20 WC Physics, Fluids & Plasmas SC Physics GA KV459 UT WOS:A1993KV45900007 ER PT J AU ONGENA, J CONRADS, H GAIGNEAUX, M MESSIAEN, AM WEYNANTS, RR BARBIAN, E BERTSCHINGER, G BORGERMANS, P BUDNY, RV DELVIGNE, T DUMORTIER, P DURODIE, F ESSER, HG EURINGER, H FUCHS, G GIESEN, B GRAFFMANN, E HILLIS, DL HOENEN, F HUTTEMANN, P JADOUL, M KEVER, H KOCH, R KOHLHAAS, W KONEN, L KORTEN, M KOSLOWSKI, HR KRAMERFLECKEN, A LOCHTER, M MANK, G POSPIESZCZYK, A SAMM, U SCHWEER, B SOLTWISCH, H TELESCA, G UHLEMANN, R VANDENPLAS, PE VANNIEUWENHOVE, R VANOOST, G VERVIER, M VANWASSENHOVE, G WAIDMANN, G WINTER, J WOLF, GH AF ONGENA, J CONRADS, H GAIGNEAUX, M MESSIAEN, AM WEYNANTS, RR BARBIAN, E BERTSCHINGER, G BORGERMANS, P BUDNY, RV DELVIGNE, T DUMORTIER, P DURODIE, F ESSER, HG EURINGER, H FUCHS, G GIESEN, B GRAFFMANN, E HILLIS, DL HOENEN, F HUTTEMANN, P JADOUL, M KEVER, H KOCH, R KOHLHAAS, W KONEN, L KORTEN, M KOSLOWSKI, HR KRAMERFLECKEN, A LOCHTER, M MANK, G POSPIESZCZYK, A SAMM, U SCHWEER, B SOLTWISCH, H TELESCA, G UHLEMANN, R VANDENPLAS, PE VANNIEUWENHOVE, R VANOOST, G VERVIER, M VANWASSENHOVE, G WAIDMANN, G WINTER, J WOLF, GH TI IMPROVED CONFINEMENT IN TEXTOR SO NUCLEAR FUSION LA English DT Article ID TOKAMAK AB A new regime of enhanced confinement (1-mode) is found in plasmas with circular cross-section in the pump limiter tokamak TEXTOR with boronized walls. This regime is obtained with three types of auxiliary heating, namely NBI co-injection, NBI counter-injection + ICRH and NBI co-injection + NBI counter-injection, and has many similarities with the H-mode regime obtained in divertor tokamaks. The energy confinement times obtained in these discharges scale as favourably as those in stationary H-mode discharges with edge localized modes. A detailed analysis of the scaling of the confinement time with plasma current, heating power and plasma density is presented. Characteristic electron density and temperature profiles are observed, with large central values and well developed edge pedestals. They are compared with those found in H-mode discharges and supershots. A poloidal beta limit of 1.6 is found in the I-mode discharges of TEXTOR. The maximum toroidal beta values obtained reach nearly 1%, i.e. 0.7 times the Troyon limit in TEXTOR. I-mode confinement is always linked with low recycling and absence of MHD activity. If these conditions are not met, L-mode scaling is retrieved. MHD activity, which is more likely to occur at low plasma densities and currents, can cause a sudden drop to L-mode scaling. So far, no transition from the L-mode scaling to the I-mode scaling has been observed. C1 ASSOC EURATOM KFA,FORSCHUNGSZENTRUM JULICH GMBH,INST PLASMAPHYS,JULICH,GERMANY. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. PRINCETON PLASMA PHYS LAB,PRINCETON,NJ. RP ONGENA, J (reprint author), ECOLE ROYALE MIL,KONINKLIJKE MIL SCH,ASSOC EURATOM BELG STAAT,ASSOC EURATOM ETAT BELG,BRUSSELS,BELGIUM. NR 24 TC 27 Z9 27 U1 0 U2 2 PU INT ATOMIC ENERGY AGENCY PI VIENNA PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA SN 0029-5515 J9 NUCL FUSION JI Nucl. Fusion PD FEB PY 1993 VL 33 IS 2 BP 283 EP 300 DI 10.1088/0029-5515/33/2/I08 PG 18 WC Physics, Fluids & Plasmas SC Physics GA KV459 UT WOS:A1993KV45900008 ER PT J AU COLCHIN, RJ ACETO, SC ENGLAND, AC ISLER, RC MURAKAMI, M RASMUSSEN, DA UCKAN, T WILGEN, JB ZIELINSKI, JJ AF COLCHIN, RJ ACETO, SC ENGLAND, AC ISLER, RC MURAKAMI, M RASMUSSEN, DA UCKAN, T WILGEN, JB ZIELINSKI, JJ TI PLASMA PROFILE MODIFICATIONS USING MAGNETIC-FIELD PERTURBATIONS IN THE ATF TORSATRON SO NUCLEAR FUSION LA English DT Article AB Effects of deliberately introduced magnetic field perturbations on plasma conditions have been studied in the Advanced Toroidal Facility (ATF) torsatron. Magnetic dipole coils, located above the plasma at two positions 180-degrees apart, created a perturbation B(z0)/B(phi0) less-than-or-equal-to 1.4%, which produced a large i = 1/2 island. Two modes of plasma operation were employed: (1) constant gas feed allowing the electron density to vary and (2) constant density with the gas feedback controlled. Without density control, the density and the stored energy were approximately halved. With density control, the stored energy decreased only slightly and the potential increased in the vicinity of the island. It was found that both with and without density control, the pressure profile narrowed and the particle confinement was lowered substantially when the perturbations were applied. Thus. field perturbations provide an external control on the pressure profile and the particle confinement time. C1 RENSSELAER POLYTECH INST,TROY,NY 12181. RP COLCHIN, RJ (reprint author), OAK RIDGE NATL LAB,DIV FUS ENERGY,OAK RIDGE,TN 37831, USA. OI Isler, Ralph/0000-0002-5368-7200 NR 24 TC 7 Z9 7 U1 0 U2 0 PU INT ATOMIC ENERGY AGENCY PI VIENNA PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA SN 0029-5515 J9 NUCL FUSION JI Nucl. Fusion PD FEB PY 1993 VL 33 IS 2 BP 323 EP 332 DI 10.1088/0029-5515/33/2/I11 PG 10 WC Physics, Fluids & Plasmas SC Physics GA KV459 UT WOS:A1993KV45900011 ER PT J AU SOLDNER, FX BARTIROMO, R LEUTERER, F ZARNSTORFF, MC BOSCH, HS FAHRBACH, HU MULLER, ER MURMANN, HD STEUER, KH VOLLMER, O AF SOLDNER, FX BARTIROMO, R LEUTERER, F ZARNSTORFF, MC BOSCH, HS FAHRBACH, HU MULLER, ER MURMANN, HD STEUER, KH VOLLMER, O TI COMBINED OPERATION OF LOWER HYBRID CURRENT DRIVE AND HEATING AND NEUTRAL BEAM INJECTION ON ASDEX SO NUCLEAR FUSION LA English DT Article ID JT-60 TOKAMAK AB Current drive and heating with lower hybrid (LH) waves were combined with neutral beam injection (NBI) heating on ASDEX up to total powers of 4.2 MW. The same LH current drive efficiency as in Ohmic target plasmas was obtained. For the energy confinement time, similar parametric dependences on heating power, plasma current and q(a) value as in plateau-like scaling were found for combined operation of NBI and LH current drive in the L-mode. H-modes were triggered routinely by injection of LH waves during NBI. Peaked current density profiles give better global confinement than broad profiles in combined NBI and LH current drive. C1 ENEA,CTR RIC ENERGIA FRASCATI,FRASCATI,ITALY. PRINCETON PLASMA PHYS LAB,PRINCETON,NJ. RP SOLDNER, FX (reprint author), MAX PLANCK INST PLASMA PHYS,EURATOM IPP ASSOC,W-8046 GARCHING,GERMANY. RI Bosch, Hans-Stephan/F-9527-2015 NR 21 TC 8 Z9 9 U1 0 U2 1 PU INT ATOMIC ENERGY AGENCY PI VIENNA PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA SN 0029-5515 J9 NUCL FUSION JI Nucl. Fusion PD FEB PY 1993 VL 33 IS 2 BP 333 EP 347 DI 10.1088/0029-5515/33/2/I12 PG 15 WC Physics, Fluids & Plasmas SC Physics GA KV459 UT WOS:A1993KV45900012 ER PT J AU MONTICELLO, DA AF MONTICELLO, DA TI ADVANCES IN SIMULATION AND MODELING OF THERMONUCLEAR PLASMAS - REPORT ON THE IAEA TECHNICAL COMMITTEE MEETING HELD AT MONTREAL, QUEBEC, CANADA, 15-17 JUNE 1992 SO NUCLEAR FUSION LA English DT Editorial Material RP MONTICELLO, DA (reprint author), PRINCETON PLASMA PHYS LAB,PRINCETON,NJ, USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU INT ATOMIC ENERGY AGENCY PI VIENNA PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA SN 0029-5515 J9 NUCL FUSION JI Nucl. Fusion PD FEB PY 1993 VL 33 IS 2 BP 359 EP 363 DI 10.1088/0029-5515/33/2/415 PG 5 WC Physics, Fluids & Plasmas SC Physics GA KV459 UT WOS:A1993KV45900015 ER PT J AU AUBERT, B BAZAN, A BEAUGIRAUD, B COLAS, J LEFLOUR, T MAIRE, M VIALLE, JP WINGERTERSEEZ, I ZOLNIEROWSKI, YP GORDON, HA RADEKA, V RAHM, D STEPHANI, D BULGAKOV, N CHEVALLEY, JL FABJAN, CW FOURNIER, D GILDEMEISTER, O JENNI, P NESSI, M NESSITEDALDI, F PEPE, M RICHTER, W SODERQVIST, J VUILLEMIN, V BAZE, JM GOSSET, L LAVOCAT, P LOTTIN, JP MANSOULIE, B MEYER, JP RENARDY, JR TEIGER, J ZACCONE, H BATTISTONI, G CAMIN, DV CAVALLI, D COSTA, G CRAVERO, A FERRARI, A GIANOTTI, F MANDELLI, L MAZZANTI, M PERINI, L SCIAMANNA, M AUGE, E CHASE, R CHOLLET, JC DELATAILLE, C FAYARD, L HRISOHO, A JEAN, P ICONOMIDOUFAYARD, L LEMEUR, G MERKEL, B NOPPE, JM PARROUR, G PETROFF, P REPELLIN, JP SCHAFFER, A SEGUIN, N UNAL, G FUGLESANG, C LEFEBVRE, M AF AUBERT, B BAZAN, A BEAUGIRAUD, B COLAS, J LEFLOUR, T MAIRE, M VIALLE, JP WINGERTERSEEZ, I ZOLNIEROWSKI, YP GORDON, HA RADEKA, V RAHM, D STEPHANI, D BULGAKOV, N CHEVALLEY, JL FABJAN, CW FOURNIER, D GILDEMEISTER, O JENNI, P NESSI, M NESSITEDALDI, F PEPE, M RICHTER, W SODERQVIST, J VUILLEMIN, V BAZE, JM GOSSET, L LAVOCAT, P LOTTIN, JP MANSOULIE, B MEYER, JP RENARDY, JR TEIGER, J ZACCONE, H BATTISTONI, G CAMIN, DV CAVALLI, D COSTA, G CRAVERO, A FERRARI, A GIANOTTI, F MANDELLI, L MAZZANTI, M PERINI, L SCIAMANNA, M AUGE, E CHASE, R CHOLLET, JC DELATAILLE, C FAYARD, L HRISOHO, A JEAN, P ICONOMIDOUFAYARD, L LEMEUR, G MERKEL, B NOPPE, JM PARROUR, G PETROFF, P REPELLIN, JP SCHAFFER, A SEGUIN, N UNAL, G FUGLESANG, C LEFEBVRE, M TI PERFORMANCE OF A LIQUID ARGON ELECTROMAGNETIC CALORIMETER WITH A CYLINDRICAL ACCORDION GEOMETRY SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB A Prototype of a lead liquid argon accordion calorimeter with two types of cylindrical geometry was constructed and equipped with high speed readout electronics. The energy resolution for electrons is 10%/square-root E (GeV) with a local constant term of 0.65%. The resolutions obtained for position and angular measurements are given. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. CERN,CH-1211 GENEVA 23,SWITZERLAND. DAPNIA SPP SACLAY,GIF ZUR YVETTE,FRANCE. UNIV MILAN,DIPARTIMENTO FIS,I-20122 MILAN,ITALY. INFN,MILAN,ITALY. LAL,ORSAY,FRANCE. MANNE SIEGBAHN INST,STOCKHOLM,SWEDEN. UNIV VICTORIA,VICTORIA V8W 2Y2,BC,CANADA. RP AUBERT, B (reprint author), LAPP,ANNECY,FRANCE. NR 9 TC 6 Z9 6 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 FEB 1 PY 1993 VL 325 IS 1-2 BP 116 EP 128 DI 10.1016/0168-9002(93)91012-C PG 13 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KJ367 UT WOS:A1993KJ36700007 ER PT J AU VALENTINE, JD MOSES, WW DERENZO, SE WEHE, DK KNOLL, GF AF VALENTINE, JD MOSES, WW DERENZO, SE WEHE, DK KNOLL, GF TI TEMPERATURE-DEPENDENCE OF CSI(TL) GAMMA-RAY EXCITED SCINTILLATION CHARACTERISTICS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID CRYSTAL AB The gamma-ray excited, temperature dependent scintillation characteristics of CsI(Tl) are reported over the temperature range of -100 to +50-degrees-C. The modified Bollinger-Thomas and shaped square wave methods were used to measure the rise and decay times. Emission spectra were measured using a monochromator and corrected for monochromator and photocathode spectral efficiencies. The shaped square wave method was also used to determine the scintillation yield as was a current mode method. The thermoluminescence emissions of CsI(Tl) were measured using the same current mode method. At room temperature, CsI(Tl) was found to have two primary decay components with decay time constants of tau1 = 679 +/- 10 ns (63.7%) and tau2 = 3.34 +/- 0.14 mus (36.1%), and to have emission bands at about 400 and 560 nm. The tau1 luminescent state was observed to be populated by an exponential process with a resulting rise time constant of 19.6 +/- 1.9 ns at room temperature. An ultra-fast decay component with a < 0.5 ns decay time was found to emit about 0.2% (about 100 photons/MeV) of the total scintillation light. Except for the ultra-fast decay time, the rise and decay time constants were observed to increase exponentially with inverse temperature. At -80-degrees-C tau1 and tau2 were determined to be 2.22 +/- 0.33 mus and 18.0 +/- 2.59 mus, respectively, while the 400 nm emission band was not observed below -50-degrees-C. At +50-degrees-C the decay constants were found to be 628 ns (70.5%) and 2.63 mus (29.3%) and both emission bands were present. The scintillation yield of CsI(Tl) was observed to be only slightly temperature dependent between -30 and +50-degrees-C, peaking at about -30-degrees-C (about 6% above the room temperature yield) and monotonically decreasing above and below this temperature. Four different commercially available CsI(Tl) crystals were used. Minimal variations in the measured scintillation characteristics were observed among these four crystals. Thermoluminescence emissions were observed to have peak yields at -90, -65, -40, +20, and possibly -55-degrees-C. The relative magnitudes and number of thermoluminescence peaks were found to vary from crystal to crystal. C1 LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. RP VALENTINE, JD (reprint author), UNIV MICHIGAN, DEPT NUCL ENGN, ANN ARBOR, MI 49109 USA. NR 23 TC 78 Z9 78 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 EI 1872-9576 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD FEB 1 PY 1993 VL 325 IS 1-2 BP 147 EP 157 DI 10.1016/0168-9002(93)91015-F PG 11 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KJ367 UT WOS:A1993KJ36700010 ER PT J AU BROSS, AD PLADALMAU, A SPANGLER, CW AF BROSS, AD PLADALMAU, A SPANGLER, CW TI NEW FLUORESCENT COMPOUNDS FOR PLASTIC SCINTILLATOR APPLICATIONS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID 3-HYDROXYFLAVONE AB The fluorescent compound 3-hydroxyflavone (3HF) has been modified in order to study the resulting structure-fluorescence relationship. A series of twelve derivatives, bearing different substituents at various positions on the phenyl ring, has been synthesized. Each derivative has been tested as a dopant for plastic scintillator applications by incorporating it in a polystyrene matrix. The absorption, fluorescence, and scintillation light yield characteristics of these compounds in polystyrene have been determined. In addition, emission time distributions have been measured and decay time constants have been calculated from these data. C1 NO ILLINOIS UNIV, DEPT CHEM, DE KALB, IL 60115 USA. RP FERMILAB NATL ACCELERATOR LAB, PARTICLE DETECTOR GRP, POB 500, BATAVIA, IL 60510 USA. NR 20 TC 13 Z9 13 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 EI 1872-9576 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD FEB 1 PY 1993 VL 325 IS 1-2 BP 168 EP 175 DI 10.1016/0168-9002(93)91018-I PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KJ367 UT WOS:A1993KJ36700013 ER PT J AU LANGENBRUNNER, J BARAKAT, MB HUNGERFORD, EV PILLAI, CT TANAKA, N THIESSEN, HA RYBARCYK, LJ JONES, KW BARLOW, DB MCCLELLAND, JB DRESSMAN, DC PILTCH, SC MIHAILIDIS, DN DONAHUE, JB MORRIS, CL WERBECK, RD AF LANGENBRUNNER, J BARAKAT, MB HUNGERFORD, EV PILLAI, CT TANAKA, N THIESSEN, HA RYBARCYK, LJ JONES, KW BARLOW, DB MCCLELLAND, JB DRESSMAN, DC PILTCH, SC MIHAILIDIS, DN DONAHUE, JB MORRIS, CL WERBECK, RD TI PION-PRODUCTION AT SMALL ANGLES SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID PROTONS; NUCLEI AB Pi+ and pi- production cross sections for 800-MeV proton on C and Cu have been measured at laboratory angles of 0-degrees, 3-degrees, 5-degrees, 7-degrees, 10-degrees, 15-degrees, and 20-degrees. Pions were analyzed using the High Resolution Proton Spectrometer (HRS) facility for momenta from 364 to 675 MeV/c. Particle identification was made utilizing a time-of-flight method. We estimate the total systematic and statistical error to be +/- 15% for measurements at 0-degrees and 3-degrees and +/- 10% at other angles. These data have been used to determine the optimum energy and pion production angle for injection into a proposed superconducting accelerator for pions. Protons are the main source of contamination for a pi+ beam. Proton-to-pion ratios are given for laboratory angles of 5-degrees and larger. C1 UNIV HOUSTON,DEPT PHYS,HOUSTON,TX 77204. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP LANGENBRUNNER, J (reprint author), UNIV MINNESOTA,DEPT PHYS,MINNEAPOLIS,MN 55455, USA. NR 19 TC 3 Z9 3 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 FEB 1 PY 1993 VL 325 IS 1-2 BP 187 EP 195 DI 10.1016/0168-9002(93)91020-N PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KJ367 UT WOS:A1993KJ36700015 ER PT J AU MATULEWICZ, T HENNING, W EMLING, H FREIFELDER, R GREIN, H GROSSE, E HERRMANN, N HOLZMANN, R KULESSA, R SIMON, RS WOLLERSHEIM, HJ SCHOCH, B VOGT, J WILHELM, M KRATZ, JV SCHMIDT, R JANSSENS, RVF AF MATULEWICZ, T HENNING, W EMLING, H FREIFELDER, R GREIN, H GROSSE, E HERRMANN, N HOLZMANN, R KULESSA, R SIMON, RS WOLLERSHEIM, HJ SCHOCH, B VOGT, J WILHELM, M KRATZ, JV SCHMIDT, R JANSSENS, RVF TI RESPONSE OF BGO DETECTORS TO PHOTONS OF 3-50 MEV ENERGY SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID SPECTROMETER; RADIATION; SCINTILLATORS; PERFORMANCE; TAPS AB The response of an array of 7 hexagonal BGO detectors each 7.5 cm long (6.7 radiation lengths) with 3.6 cm side-to-side distance was measured using monochromatic photons from the tagged-photon facility at the electron accelerator MAMI A at Mainz. The experimental spectra of the deposited energy for a single detector and for the array of seven modules compare very well with the predictions of Monte Carlo shower simulations using the code GEANT3. Significant improvement of the energy resolution is observed for the summed energy spectra compared to the resolution of a single module. This improvement deteriorates at higher photon energies because the length of the detector is not sufficient to absorb the forward component of the electromagnetic shower. C1 UNIV MAINZ,INST KERNPHYS,W-6500 MAINZ,GERMANY. UNIV MAINZ,INST KERNCHEM,W-6500 MAINZ,GERMANY. ARGONNE NATL LAB,ARGONNE,IL 60439. JAGIELLONIAN UNIV,PL-31007 KRAKOW,POLAND. RP MATULEWICZ, T (reprint author), GESELL SCHWERIONENFORSCH GMBH,W-6100 DARMSTADT,GERMANY. NR 15 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD FEB 1 PY 1993 VL 325 IS 1-2 BP 216 EP 223 DI 10.1016/0168-9002(93)91023-G PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KJ367 UT WOS:A1993KJ36700018 ER PT J AU CARPENTER, JM MILDNER, DFR AF CARPENTER, JM MILDNER, DFR TI IMPROVING THE RESOLUTION OF CHOPPER SPECTROMETERS AT PULSED NEUTRON SOURCES SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB We examine the relationships between intensity and resolution in pulsed-source chopper spectrometers, including the effects of Soller collimation, narrower rotor slits and higher rotor speeds. The basis is a simplified description of a spectrometer, approximately optimizing the rotor pulse and lighthouse effects. The analysis includes a new treatment of the angular distribution transmitted through a system consisting of a coarse collimator and a Soller collimator. The results encourage the prospect for a reasonably easily accomplished, higher resolution, optional configuration of the pulsed-source chopper spectrometers. C1 UNIV MISSOURI,RES REACTOR FACIL,COLUMBIA,MO 65211. UNIV MISSOURI,DEPT PHYS,COLUMBIA,MO 65211. RP CARPENTER, JM (reprint author), ARGONNE NATL LAB,INTENSE PULSED NEUTRON SOURCE,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 6 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD FEB 1 PY 1993 VL 325 IS 1-2 BP 255 EP 265 DI 10.1016/0168-9002(93)91027-K PG 11 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KJ367 UT WOS:A1993KJ36700022 ER PT J AU ALTON, GD AF ALTON, GD TI ION SOURCES FOR ACCELERATORS IN MATERIALS RESEARCH SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Review ID SURFACE-PLASMA SOURCES; NEGATIVE-ION; EMISSION CHARACTERISTICS; EMITTANCE MEASUREMENTS; VELOCITY DEPENDENCE; ENERGY-DISTRIBUTION; H PRODUCTION; ECR SOURCE; FIELD; GALLIUM AB Reviews are presented of the principal sources that are presently being utilized or can be potentially used for materials science applications, with particular emphasis placed OD recent improvements to existing sources and new source developments that show promise for such applications. Specifically, status reports will be given on a number of state-of-the-art positive and negative ion sources routinely used for many materials research applications, including implantation, ion beam deposition, isotope separation, modification of surface properties, ion beam lithography, secondary ion mass spectrometry (SIMS), accelerator mass spectrometry (AMS), Rutherford backscattering spectroscopy (RBS), and proton-induced X-ray emission (PIXE). RP ALTON, GD (reprint author), OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831, USA. NR 319 TC 37 Z9 37 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 FEB PY 1993 VL 73 IS 2 BP 221 EP 288 DI 10.1016/0168-583X(93)95738-Q PG 68 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KL011 UT WOS:A1993KL01100016 ER PT J AU FUJIBAYASHI, Y SOM, P YONEKURA, Y KNAPP, FF TAMAKI, N YAMAMOTO, K KONISHI, J YOKOYAMA, A AF FUJIBAYASHI, Y SOM, P YONEKURA, Y KNAPP, FF TAMAKI, N YAMAMOTO, K KONISHI, J YOKOYAMA, A TI MYOCARDIAL ACCUMULATION OF IODINATED BETA-METHYL-BRANCHED FATTY-ACID ANALOG, [I-125] (P-IODOPHENYL)-3-(R,S)-METHYLPENTADECANOIC ACID (BMIPP), AND CORRELATION TO ATP CONCENTRATION .2. STUDIES IN SALT-INDUCED HYPERTENSIVE RATS SO NUCLEAR MEDICINE AND BIOLOGY LA English DT Article ID LEFT-VENTRICULAR HYPERTROPHY; METABOLISM AB This study investigates the possible relationship between myocardial [I-125]BMIPP accumulation and ATP concentration, in the salt-induced hypertensive Dahl-strain rats. [I-125]BMIPP accumulation in the myocardium was inversely related to the degree of hypertension. On the other hand, ATP levels increased in the myocardium of rats with higher blood pressure showing an inverse relationship with BMIPP accumulation. Further studies are required for elucidating these possible inter-related phenomena. C1 KYOTO UNIV,FAC PHARMACEUT SCI,DEPT RADIOPHARMACEUT CHEM,SHIMOADACHI CHO,SAKYO KU,KYOTO 606,JAPAN. KYOTO UNIV,SCH MED,KYOTO 606,JAPAN. OAK RIDGE NATL LAB,OAK RIDGE,TN 37830. BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. RI Yasuda, Kazunori/D-4156-2012 NR 18 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 0883-2897 J9 NUCL MED BIOL JI Nucl. Med. Biol. PD FEB PY 1993 VL 20 IS 2 BP 163 EP 166 DI 10.1016/0969-8051(93)90109-8 PG 4 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA KL023 UT WOS:A1993KL02300006 PM 8448569 ER PT J AU OSTER, ZH SOM, P RHODES, BA WONG, CTC CABAHUG, C SACKER, DF WANG, GJ MEINKEN, GE AF OSTER, ZH SOM, P RHODES, BA WONG, CTC CABAHUG, C SACKER, DF WANG, GJ MEINKEN, GE TI ABSCESS SCINTIGRAPHY WITH TC-99M-HUMAN IMMUNOGLOBULIN (IGG) USING A ONE-STEP LABELING METHOD SO NUCLEAR MEDICINE AND BIOLOGY LA English DT Article ID INFLAMMATION; LEUKOCYTES; LOCALIZATION; INFECTION; FRAGMENTS; TUMOR AB It was shown earlier that non-specific human gamma globulin (IgG) labeled with In-111 can be used as an agent for abscess localization. We describe experimental results with Tc-99m-IgG in animals bearing abscesses and tumors using a one-step labeling method with Tc-99m. We studied this compound in several animal models: mice bearing turpentine abscesses and subcutaneously transplanted sarcomas, in rats with turpentine or E. coli abscesses and intracerebrally implanted gliomas and in rabbits with E. coli or turpentine abscesses. Blood clearance was studied in dogs. It was found that the absolute concentration of In-111-IgG in abscess and tumor was higher than that of Tc-99m-IgG. However, the abscess-to-tumor ratio was higher for Tc-99m-IgG. The Tc-99m-IgG images were of high quality and abscesses could be detected as early as 30 min post-injection (p.i.). It appears that Tc-99m-IgG has many potential advantages over, In-111-IgG because of better physical properties of Tc-99m, simpler preparation, lower cost and greater availability and the possibility of using higher Tc-99m doses. C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. SUNY STONY BROOK,DEPT RADIOL,STONY BROOK,NY 11794. RHO MED INC,ALBUQUERQUE,NM. NR 18 TC 2 Z9 3 U1 0 U2 0 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 FEB PY 1993 VL 20 IS 2 BP 225 EP 230 DI 10.1016/0969-8051(93)90119-F PG 6 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA KL023 UT WOS:A1993KL02300016 PM 8448577 ER PT J AU JARZYNSKI, C SWIATECKI, WJ AF JARZYNSKI, C SWIATECKI, WJ TI A UNIVERSAL ASYMPTOTIC VELOCITY DISTRIBUTION FOR INDEPENDENT PARTICLES IN A TIME-DEPENDENT IRREGULAR CONTAINER SO NUCLEAR PHYSICS A LA English DT Article ID NUCLEUS-NUCLEUS COLLISIONS; DYNAMICS; RESEPARATION; COALESCENCE; SYSTEMS; FUSION AB We show that the velocity distribution f(v) for a gas of non-interacting particles bouncing around in a deforming irregular container of fixed volume tends to a universal function independent of its original form and of the container's shape or time evolution. This function turns out to be the exponential velocity distribution f(v) is-proportional-to e(-v/c), where c is one third of the instantaneous average particle speed. This may be contrasted with the gaussian Maxwell-Boltzmann distribution appropriate in the case of a gas of interacting particles. C1 LAWRENCE BERKELEY LAB,DIV NUCL SCI,1 CYCLOTRON RD,BERKELEY,CA 94720. RI Jarzynski, Christopher/B-4490-2009 OI Jarzynski, Christopher/0000-0002-3464-2920 NR 30 TC 24 Z9 24 U1 0 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD FEB 1 PY 1993 VL 552 IS 1 BP 1 EP 9 DI 10.1016/0375-9474(93)90327-T PG 9 WC Physics, Nuclear SC Physics GA KN854 UT WOS:A1993KN85400001 ER PT J AU BRONDI, A DEANGELIS, G DONOFRIO, A LARANA, G MORO, R ROCA, V SPADACCINI, G TERRASI, F VIGILANTE, M ALBA, R BELLIA, G DELZOPPO, A RUSSO, G SAPIENZA, P DELCAMPO, JG AF BRONDI, A DEANGELIS, G DONOFRIO, A LARANA, G MORO, R ROCA, V SPADACCINI, G TERRASI, F VIGILANTE, M ALBA, R BELLIA, G DELZOPPO, A RUSSO, G SAPIENZA, P DELCAMPO, JG TI ENERGY SHARING IN BINARY REACTIONS INDUCED BY F-19 ON NI-64 AT 118 MEV SO NUCLEAR PHYSICS A LA English DT Article DE NI-64(F-19, X); E = 118 MEV; MEASURED (PARTICLE) GAMMA-COIN; I-GAMMA(THETA) DEDUCED O-18; C-13 EXCITED LEVELS-SIGMA; ENERGY SHARING; ENRICHED TARGET ID STRONGLY DAMPED COLLISIONS; COMPLEX-FRAGMENT EMISSION; EXCITATION-ENERGY; PARTITION; NUCLEON; 11-MEV AB Complex fragments have been detected in singles and in gamma-particle coincidence measurements for the F-19+64Ni system, at 118 MeV incident energy. Cross sections for the excited states of the complex fragments were measured detecting the characteristic gamma-transitions deexciting these states. The measurement of cross sections for the population of the ground and excited states of O-18 and C-13, as well as of the production cross sections of heavy residues in coincidence with these ejectiles, as a function of the total dissipated energy, indicate an evolution of energy sharing, with increasing mass transfer, from equipartition to thermal equilibrium. C1 LAB NAZL SUD,CATANIA,ITALY. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV CATANIA,DIPARTIMENTO FIS,I-95124 CATANIA,ITALY. RP BRONDI, A (reprint author), UNIV FEDERICO II,IST NAZL FIS NUCL,DIPARTIMENTO SCI FIS,PAD 20 MOSTRA OLTREMARE,I-80125 NAPLES,ITALY. RI spadaccini, giulio/K-7633-2015; Bellia, Giorgio/A-5684-2008 OI spadaccini, giulio/0000-0002-6327-432X; Bellia, Giorgio/0000-0003-3063-5739 NR 20 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 FEB 1 PY 1993 VL 552 IS 1 BP 113 EP 124 DI 10.1016/0375-9474(93)90334-T PG 12 WC Physics, Nuclear SC Physics GA KN854 UT WOS:A1993KN85400008 ER PT J AU SPRIGGS, GD AF SPRIGGS, GD TI 2 ROSSI-ALPHA TECHNIQUES FOR MEASURING THE EFFECTIVE DELAYED NEUTRON FRACTION SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article AB Two techniques for measuring the effective delayed neutron fraction have been developed. The techniques are based on a combination of the Rossi-alpha technique and the source-multiplication technique. They require minimal knowledge of the assembly, use variables that can be measured, and are independent of the detector efficiency and the neutron lifetime. RP SPRIGGS, GD (reprint author), LOS ALAMOS NATL LAB,POB 1663,MS G783,LOS ALAMOS,NM 87545, USA. NR 26 TC 24 Z9 25 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 FEB PY 1993 VL 113 IS 2 BP 161 EP 172 PG 12 WC Nuclear Science & Technology SC Nuclear Science & Technology GA KK439 UT WOS:A1993KK43900006 ER PT J AU FAWCETT, LR AF FAWCETT, LR TI ANALYSIS OF TRITIUM PRODUCTION IN A SPHERE OF 6LID WITH ORALLOY CORE IRRADIATED BY 14-MEV NEUTRONS SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article ID (LID)-LI-6 AB Tritium production in a sphere of Li-6D with an Oralloy core irradiated by a central source of 14-Me V neutrons has been calculated and compared with experimental measurements. The experimental assembly consisted of an Oralloy sphere surrounded by three solid Li-6D concentric shells with ampoules of Li-6H and Li-7H located in several positions throughout the assembly. The Los Alamos Monte Carlo Neutron Photon Transport Code (MCNP) was used to calculate neutron transport throughout the system and tritium production in the ampoules. The MCNP calculations were three-dimensional and employed ENDF/B-V cross sections. The overall experimentally observed-to-calculated ratios of tritium production were 0.996 (+/-2.5%) in Li-6H ampoules and 0.903 (+/-5.2%) in Li-7H ampoules. Tritium production in a sphere of Li-6D without an Oralloy core has been reanalyzed using ENDF/B-V cross sections, and the results are reported. The reanalyzed observed-to-calculated values of tritium production were 1.053 (+/-2.1%) in Li-6H and 0.999 (+/-2.1%) in Li-7H. The foregoing several uncertainties do not include an estimated <6% systematic error in the observed values. C1 LONGWOOD COLL,PHYS & PREENGN PROGRAM,FARMVILLE,VA 23901. RP FAWCETT, LR (reprint author), LOS ALAMOS NATL LAB,DIV APPL THEORET PHYS,BOX 1663,LOS ALAMOS,NM 87545, USA. NR 14 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 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD FEB PY 1993 VL 113 IS 2 BP 173 EP 183 PG 11 WC Nuclear Science & Technology SC Nuclear Science & Technology GA KK439 UT WOS:A1993KK43900007 ER PT J AU EDWARDS, LL FREIS, RP PETERS, LG GUDIKSEN, PH PITOVRANOV, SE AF EDWARDS, LL FREIS, RP PETERS, LG GUDIKSEN, PH PITOVRANOV, SE TI THE USE OF NONLINEAR-REGRESSION ANALYSIS FOR INTEGRATING POLLUTANT CONCENTRATION MEASUREMENTS WITH ATMOSPHERIC DISPERSION MODELING FOR SOURCE TERM ESTIMATION SO NUCLEAR TECHNOLOGY LA English DT Article DE SOURCE TERM ESTIMATION; ATMOSPHERIC DISPERSION; NONLINEAR REGRESSION AB The accuracy associated with assessing the environmental consequences of an accidental release of radio-activity is highly dependent on the knowledge of the source term characteristics, which are generally poorly known. The development of an automated numerical technique that integrates the radiological measurements with atmospheric dispersion modeling for more accurate source term estimation is reported. Often, this process of parameter estimation is performed by an emergency response assessor, who takes an intelligent first guess at the model parameters, then, comparing the model results with whatever measurements are available, makes an intuitive, informed next guess of the model parameters. This process may be repeated any number of times until the assessor feels that the model results are reasonable in terms of the measured observations. This process may be a most time-consuming activity that is not always suitable for real-time source term and dose assessment. Furthermore, this approach does not necessarily achieve the optimal solution because of the complicated, nonlinear relationships between the input parameters and the model predictions, because of the generally time-varying nature of source emissions and meteorology. A new approach, based on a nonlinear least-squares regression scheme coupled with the existing Atmospheric Release Advisory Capability three-dimensional atmospheric dispersion models, is to supplement the assessor's intuition with automated mathematical methods that do not significantly increase the response time of the existing predictive models. The viability of the approach is evaluated by estimation of the known SF6 tracer release rates associated with the Mesoscale Atmospheric Transport Studies tracer experiments conducted at the Savannah River Laboratory during 1983. These 19 experiments resulted in 14 successful, separate tracer releases with sampling of the tracer plumes along the cross-plume arc situated approximately 30 km from the release site. The regression technique optimizes the agreement between the measured and model-predicted tracer concentrations by varying the model input parameters within reasonable ranges of uncertainties. The technique generally estimated the measured tracer release rates within a factor of 2, with the worst estimate being within a factor of 5. This level of accuracy is quite reasonable in view of the sparse tracer concentration measurements (none closer than 30 km), the uncertainties associated with the spatial representativeness of the meteorological data, and the limitations of the models. These results, albeit for a relatively simple source term, suggest that the regression methodology is sufficiently promising to warrant further development and testing for more complex source terms. C1 RUSSIAN ACAD SCI,INST SYST STUDIES,MOSCOW,RUSSIA. RP EDWARDS, LL (reprint author), LAWRENCE LIVERMORE NATL LAB,DIV ATMOSPHER & GEOPHYS SCI,MODEL APPLICAT & NUCL EFFECTS GRP,LIVERMORE,CA 94550, USA. NR 18 TC 6 Z9 6 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 FEB PY 1993 VL 101 IS 2 BP 168 EP 180 PG 13 WC Nuclear Science & Technology SC Nuclear Science & Technology GA KH309 UT WOS:A1993KH30900006 ER PT J AU MYERS, RL PAYSON, RA CHOTANI, MA DEAVEN, LL CHIU, IM AF MYERS, RL PAYSON, RA CHOTANI, MA DEAVEN, LL CHIU, IM TI GENE STRUCTURE AND DIFFERENTIAL EXPRESSION OF ACIDIC FIBROBLAST GROWTH-FACTOR MESSENGER-RNA - IDENTIFICATION AND DISTRIBUTION OF 4 DIFFERENT TRANSCRIPTS SO ONCOGENE LA English DT Article ID SMOOTH-MUSCLE CELLS; FACTOR-II GENE; FACTOR FAMILY; HUMAN GLIOMAS; TISSUES; MENINGIOMAS; PROMOTERS; SEQUENCE; CULTURE; CLASS-1 AB We have isolated four cDNA clones coding for human acidic fibroblast growth factor (aFGF) containing alternative 5' untranslated exons. Using RNAase protection analyses, we demonstrated the presence of at least four upstream, untranslated exons that are alternatively spliced to the first protein-coding exon. We designate these four untranslated exons, - 1A, - 1B, - 1C and - 1D. Splicing of these exons to the first coding exon will generate mRNA 1.A, 1.B, 1.C and 1.D respectively. Expression of these transcripts is regulated in a tissue-specific manner, as the major aFGF transcript in human brain frontal cortex differs from that in kidney. Furthermore, the pattern of aFGF transcripts in several glioblastoma cell fines tested is different from that in normal brain tissue. We isolated nine overlapping genomic clones containing these four upstream, untranslated exons. These four exons were localized on these clones by Southern hybridization and nucleotide sequence analysis. The overlapping clones are shown to be contiguous with our previously isolated genomic clones that contain the three aFGF-coding exons. The sizes of the four introns are 82.9, 71.1, 29.3 and 6.9 kbp. The transcriptional start sites of the two most upstream exons (- 1A and - 1B) have been mapped using RNAase protection and primer extension analyses. The sequences upstream of the start sites for aFGF 1.B mRNA do not contain a consensus TATA box. In contrast, the canonical CCAAT and TATA sequences are located at the proper distances from the transcription start site of aFGF 1.A mRNA. C1 OHIO STATE UNIV, DEPT INTERNAL MED, DAVIS MED RES CTR, 480 W 9TH AVE, COLUMBUS, OH 43210 USA. OHIO STATE UNIV, CTR COMPREHENS CANC, COLUMBUS, OH 43210 USA. LOS ALAMOS NATL LAB, CTR HUMAN GENOME STUDIES, LOS ALAMOS, NM 87545 USA. RI Chotani, Maqsood/E-2891-2011; Chiu, Ing-Ming/B-1534-2008 FU NCI NIH HHS [P30 CA16058, T32 CA09338, R01 CA45611] NR 48 TC 54 Z9 56 U1 0 U2 2 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0950-9232 J9 ONCOGENE JI Oncogene PD FEB PY 1993 VL 8 IS 2 BP 341 EP 349 PG 9 WC Biochemistry & Molecular Biology; Oncology; Cell Biology; Genetics & Heredity SC Biochemistry & Molecular Biology; Oncology; Cell Biology; Genetics & Heredity GA KN006 UT WOS:A1993KN00600013 PM 7678925 ER PT J AU KRAUS, HG AF KRAUS, HG TI FINITE-ELEMENT AREA AND LINE INTEGRAL-TRANSFORMS FOR GENERALIZATION OF APERTURE FUNCTION AND GEOMETRY IN KIRCHHOFF SCALAR DIFFRACTION THEORY SO OPTICAL ENGINEERING LA English DT Article DE NEAR-FIELD AND FRESNEL DIFFRACTION; SPHERICAL WAVES; GAUSSIAN BEAMS; MULTIPLE-MIRROR TELESCOPES; SYNTHETIC APERTURE ARRAYS; SECONDARY OBSTRUCTIONS; SPIDER SUPPORTS; APODIZATION; OFF-AXIS APERTURES ID GAUSSIAN LASER-BEAMS; FRESNEL-DIFFRACTION; PHYSICAL OPTICS; FORMULATION AB Two finite element-based methods for calculating Fresnel region and near-field region intensities resulting from diffraction of light by two-dimensional apertures are presented. The first is derived using the Kirchhoff area diffraction integral and the second is derived using a displaced vector potential to achieve a line integral transformation. The specific form of each of these formulations is presented for incident spherical waves and for Gaussian laser beams. The geometry of the two-dimensional diffracting aperture(s) is based on biquadratic isoparametric elements, which are used to define apertures of complex geometry. These elements are also used to build complex amplitude and phase functions across the aperture(s), which may be of continuous or discontinuous form. The finite element transform integrals are accurately and efficiently integrated numerically using Gaussian quadrature. The power of these methods is illustrated in several examples which include secondary obstructions, secondary spider supports, multiple mirror arrays, synthetic aperture arrays, apertures covered by screens, apodization, phase plates, and off-axis apertures. Typically, the finite element line integral transform results in significant gains in computational efficiency over the finite element Kirchhoff transform method, but is also subject to some loss in generality. RP KRAUS, HG (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 30 TC 7 Z9 8 U1 1 U2 1 PU SOC PHOTO-OPT INSTRUM ENG PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD FEB PY 1993 VL 32 IS 2 BP 368 EP 383 DI 10.1117/12.60856 PG 16 WC Optics SC Optics GA KL365 UT WOS:A1993KL36500025 ER PT J AU LAUCKS, ML DOWELL, DH LOWREY, AR BENDER, SC LUMPKIN, AH BENTZ, MP AF LAUCKS, ML DOWELL, DH LOWREY, AR BENDER, SC LUMPKIN, AH BENTZ, MP TI OPTICAL DIAGNOSTICS FOR A RING RESONATOR FREE-ELECTRON LASER SO OPTICAL ENGINEERING LA English DT Article; Proceedings Paper CT CONF ON FIBER OPTIC MEDICAL AND FLUORESCENT SENSORS AND APPLICATIONS CY JAN, 1992 CL LOS ANGELES, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS DE OPTICAL DIAGNOSTICS; RING RESONATORS; FREE-ELECTRON LASERS ID FEL AB The optical cavity of the Boeing free-electron laser (FEL) was reconfigured as a semiconfocal ring resonator with two glancing incidence hyperboloid-paraboloid telescopes. The challenge for this experiment was the complexity of the ring resonator compared to the simplicity of a concentric cavity. The ring resonator's nonspherical mirror surfaces, its multiple elements, and the size of the components contributed to the problems of keeping the optical mode of the resonator matched to the electron beam in the wiggler. Several new optical diagnostics were developed to determine when the optical mode in the FEL was spatially and temporally matched to the electron beam through the wiggler. These included measurements of the focus position and Rayleigh range of the ring resonator optics to determine the spatial match of the optical mode through the wiggler, and a measurement of the position of the optical axis for multiple passes around the ring resonator to determine the stability of the resonator alignment. This paper also describes the optical measurements that were necessary to achieve reliable lasing. The techniques for measuring ring resonator Rayleigh range and focus position, multiple pass alignment, cavity length, optical energy per micropulse, peak power, optical extraction, small signal gain, ringdown loss, lasing wavelength, electron bunch pulse width, and energy slew are discussed. C1 BOEING CO,DEF & SPACE GRP,SEATTLE,WA 98124. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. ROCKWELL INT CORP,ROCKETDYNE DIV,CANOGA PK,CA 91303. BOEING CO,FEL FACIL,SEATTLE,WA 98124. NR 13 TC 0 Z9 0 U1 0 U2 0 PU SOC PHOTO-OPT INSTRUM ENG PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD FEB PY 1993 VL 32 IS 2 BP 384 EP 394 DI 10.1117/12.60853 PG 11 WC Optics SC Optics GA KL365 UT WOS:A1993KL36500026 ER PT J AU SMITH, LK PAYNE, SA KRUPKE, WF DELOACH, LD MORRIS, R ODELL, EW NELSON, DJ AF SMITH, LK PAYNE, SA KRUPKE, WF DELOACH, LD MORRIS, R ODELL, EW NELSON, DJ TI LASER-EMISSION FROM THE TRANSITION-METAL COMPOUND LISRCRF6 SO OPTICS LETTERS LA English DT Article ID LICAALF6-CR-3+ AB We have demonstrated laser action in the transition-metal compound LiSrCrF6. A Ti:sapphire laser was employed to pump into the long-wavelength absorption wing in order to mimic the AlGaAs laser-diode wavelengths. Slope efficiencies greater than 30% were measured with a crystal having passive losses of the order of 3-5%/cm. C1 ALLIED SIGNAL INC,MORRISTOWN,NJ 07962. RP SMITH, LK (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 5508,LIVERMORE,CA 94550, USA. NR 19 TC 11 Z9 11 U1 0 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD FEB 1 PY 1993 VL 18 IS 3 BP 200 EP 202 DI 10.1364/OL.18.000200 PG 3 WC Optics SC Optics GA KH453 UT WOS:A1993KH45300008 PM 19802083 ER PT J AU MIEDANER, A DUBOIS, DL CURTIS, CJ HALTIWANGER, RC AF MIEDANER, A DUBOIS, DL CURTIS, CJ HALTIWANGER, RC TI GENERATION OF METAL FORMYL COMPLEXES USING NICKEL AND PLATINUM HYDRIDES AS REDUCING AGENTS SO ORGANOMETALLICS LA English DT Article ID COORDINATED CARBON-MONOXIDE; ELECTROCHEMICAL REDUCTION; CATALYTIC-HYDROGENATION; ELECTRON-TRANSFER; CO; REACTIVITY; TEMPERATURE; LIGAND; ELECTROREDUCTION; CONVERSION AB The five-coordinate nickel hydride complex [Ni(dmpe)2H]PF6, (1) [dmpe = 1,2-bis-(dimethylphosphino)ethane] was synthesized by protonation of Ni(dmpe)2 with NH4PF6. The platinum analog, [Pt(dmpe)2H]PF6 (2), and [Pt(depe)2H]PF6 (3) [depe = 1,2-bis(diethylphos-phino)ethane] were synthesized by reduction of the corresponding Pt(II) complexes with NaBH4 on alumina. Complexes 1 and 3 can also be synthesized electrochemically. Reduction of Ni-(dmpe)2(2+) by two electrons in the presence of ammonium ion generates 1, and reduction of Pt(depe)2(2+) in methanol or wet acetonitrile produces 3. These hydrides react with a variety of cationic metal carbonyl complexes to produce known metal formyl complexes. The structure of 3 was determined by X-ray diffraction. Complex 3 crystallizes in a monoclinic unit cell with P2(1)/c symmetry with a = 14.258 (4) angstrom, b = 9.648 (3) angstrom, c = 21.898 (5) angstrom, beta = 91.17 (2)-degrees, V = 3011.7 (14) angstrom3, Z = 4, and d(calcd) = 1.662 g/cm3. Full-matrix least-squares refinement converged with residuals R = 4.52% and R(w) = 5.90%. C1 NATL RENEWABLE ENERGY LAB,DIV BASIC SCI,1617 COLE BLVD,GOLDEN,CO 80401. UNIV COLORADO,DEPT CHEM,BOULDER,CO 80309. NR 45 TC 51 Z9 51 U1 0 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD FEB PY 1993 VL 12 IS 2 BP 299 EP 303 DI 10.1021/om00026a014 PG 5 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA KM318 UT WOS:A1993KM31800014 ER PT J AU SCHRAG, DP DEPAOLO, DJ AF SCHRAG, DP DEPAOLO, DJ TI DETERMINATION OF DELTA-O-18 OF SEAWATER IN THE DEEP OCEAN DURING THE LAST GLACIAL MAXIMUM SO PALEOCEANOGRAPHY LA English DT Article ID DSDP INTERSTITIAL WATERS; BARBADOS; ISOTOPE; OXYGEN; RECORD; CRUST AB We present a method for determining the deltaO-18 of seawater in the deep ocean during the last glacial maximum from the measured deltaO-18 values of deep sea pore fluids. Using data from Deep Sea Drilling Project (DSDP) site 576 in the Western Pacific, this method yields a glacial to interglacial change in deltaO-18(sw) of 1.0+/-0.25 parts per thousand. This value for DELTAdeltaO-18(sw) is the first direct measurement of deep ocean deltaO-18 for the last glacial maximum and avoids the problems of spatial and temporal variability of the deltaO-18 of surface water implicit in previous determinations. More precise, higher-resolution pore fluid measurements are required to improve this determination. C1 UNIV CALIF BERKELEY,DEPT GEOL & GEOPHYS,BERKELEY CTR ISOTOPE GEOCHEM,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV EARTH SCI,BERKELEY,CA 94720. NR 20 TC 47 Z9 47 U1 2 U2 6 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0883-8305 J9 PALEOCEANOGRAPHY JI Paleoceanography PD FEB PY 1993 VL 8 IS 1 BP 1 EP 6 DI 10.1029/92PA02796 PG 6 WC Geosciences, Multidisciplinary; Oceanography; Paleontology SC Geology; Oceanography; Paleontology GA KZ517 UT WOS:A1993KZ51700001 ER PT J AU NG, E AF NG, E TI SUPERNODAL SYMBOLIC CHOLESKY FACTORIZATION ON A LOCAL-MEMORY MULTIPROCESSOR SO PARALLEL COMPUTING LA English DT Article DE LINEAR ALGEBRA; CHOLESKY FACTORIZATION; SPARSE MATRICES; DISTRIBUTED-MEMORY MULTIPROCESSOR; SYMBOLIC FACTORIZATION ID NESTED DISSECTION; ELIMINATION TREES; SPARSE; HYPERCUBE; ALGORITHM; SYSTEMS AB In this paper, we consider the symbolic factorization step in computing the Cholesky factorization of a sparse symmetric positive definite matrix on distributed-memory multiprocessor systems. By exploiting the supernodal structure in the Cholesky factor, the performance of a previous parallel symbolic factorization algorithm is improved. Empirical tests demonstrate that there can be drastic reduction in the execution time required by the new algorithm on an Intel iPSC/2 hypercube. RP NG, E (reprint author), OAK RIDGE NATL LAB,MATH SCI SECT,POB 2008,BLDG 6012,OAK RIDGE,TN 37831, USA. NR 23 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 FEB PY 1993 VL 19 IS 2 BP 153 EP 162 DI 10.1016/0167-8191(93)90045-M PG 10 WC Computer Science, Theory & Methods SC Computer Science GA KN744 UT WOS:A1993KN74400003 ER PT J AU HEINISCH, HL SINGH, BN AF HEINISCH, HL SINGH, BN TI ON THE STRUCTURE OF IRRADIATION-INDUCED COLLISION CASCADES IN METALS AS A FUNCTION OF RECOIL ENERGY AND CRYSTAL-STRUCTURE SO PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES LA English DT Article ID DISPLACEMENT CASCADES; DEFECT PRODUCTION; COMPUTER-SIMULATION; FRACTAL-GEOMETRY; FCC METALS; TEMPERATURE; SUBCASCADE; SPECTRUM AB The binary collision code MARLOWE is used to study cascade sizes, defect densities and subcascade configurations in f.c.c., b.c.c. and h.c.p. metals as a function of recoil energy up to 1 MeV. The threshold energies for the formation of subcascades are determined using a definition based on the defect configuration after the collisional phase of the cascade. A computational method was devised for identifying subcascades, and it was used to determine the number and spacing of subcascades as a function of recoil energy. The results are presented to illustrate the effect of recoil energy, atomic mass density and crystal structure on cascade volume and vacancy density after the collisional phase of the cascade, and on the number of subcascades and the subcascade spacing. The cascade morphology in the collisional phase sets the initial conditions for defect production and clustering during the development of each cascade, as well as influencing the global evolution of the microstructure. Comparisons with experimental observations illustrate fundamental differences in cascade structure for cascades of high and low energy density. C1 RISO NATL LAB, DK-4000 ROSKILDE, DENMARK. RP HEINISCH, HL (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 28 TC 55 Z9 55 U1 0 U2 5 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 FEB PY 1993 VL 67 IS 2 BP 407 EP 424 PG 18 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA KP951 UT WOS:A1993KP95100010 ER PT J AU BAKER, I HORTON, JA AF BAKER, I HORTON, JA TI INSITU STRAINING OF FE-AL IN A TRANSMISSION ELECTRON-MICROSCOPE SO PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES LA English DT Article ID SINGLE-CRYSTALS; HIGH-TEMPERATURES; SLIP DIRECTIONS; COOLING RATE; ALLOYS; DEFORMATION; STOICHIOMETRY; VACANCIES; FRACTURE; NI3AL AB In situ straining experiments have been performed in a transmission electron microscope in an attempt to understand the differences in fracture behaviour that occur as a function of composition in Fe-Al. These experiments could not find differences in the dislocation behaviour in thin foils, suggesting that bulk brittle intergranular fracture of stoichiometric FeAl does not involve dislocation motion. In all compositions, dislocation generation was profuse at the foil edges and at grain boundaries. The grain boundaries presented little barrier to slip. Slip was planar, occurring in broad bands and often on multiple systems within an individual grain. Dipoles and loops were left as debris behind gliding dislocations, even though there was no evidence of dislocation interactions, suggesting that the loops formed through a double cross-slip mechanism. C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RP BAKER, I (reprint author), DARTMOUTH COLL,THAYER SCH ENGN,HANOVER,NH 03755, USA. NR 25 TC 28 Z9 28 U1 0 U2 2 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 FEB PY 1993 VL 67 IS 2 BP 479 EP 489 PG 11 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA KP951 UT WOS:A1993KP95100015 ER PT J AU GILMAN, JJ AF GILMAN, JJ TI SHEAR-INDUCED METALLIZATION SO PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES LA English DT Article ID DIAMOND; SILICON AB It is well known that compression causes insulators and semiconductors to become metallic when the concentration of the matrix atoms (or of impurity atoms) reaches a critical value given by the theories of Herzfeld, Mott, Hubbard, Edwards and Sienko, and others. It is argued here, based on the observed transitions in diamond-framework semiconductors, that microscopic shear strains are sometimes more important than dilatations. The simple theory of hybridized covalent bonds indicates that the energy gaps in these materials should vanish when compression causes the tetrahedral bond angle (109.5-degrees) to increase to 148.2-degrees. This is close to the average observed transformation angle of 149.2-degrees (homopolar crystals). Implications for various phenomena are outlined. RP GILMAN, JJ (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 20 TC 90 Z9 91 U1 1 U2 2 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0141-8637 J9 PHILOS MAG B JI Philos. Mag. B-Phys. Condens. Matter Stat. Mech. Electron. Opt. Magn. Prop. PD FEB PY 1993 VL 67 IS 2 BP 207 EP 214 DI 10.1080/13642819308207868 PG 8 WC Materials Science, Multidisciplinary; Mechanics; Physics, Applied; Physics, Condensed Matter SC Materials Science; Mechanics; Physics GA KP952 UT WOS:A1993KP95200007 ER PT J AU DEMCZYK, BG ARONSON, MC COLES, BR SMITH, JL AF DEMCZYK, BG ARONSON, MC COLES, BR SMITH, JL TI OBSERVATION OF A SECONDARY STRUCTURAL PHASE IN THE HEAVY-FERMION SUPERCONDUCTOR UPT(3) SO PHILOSOPHICAL MAGAZINE LETTERS LA English DT Article ID UPT3; DEPENDENCE; PRESSURE AB Atomic-resolution transmission electron microscopy is used to investigate the microstructure of polycrystalline UPt3. While the host material is the previously reported hexagonal Ni3Sn structure, a second phase having the double-hexagonal Ni3Ti structure is also identified. C1 UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,LONDON SW7 2AZ,ENGLAND. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP DEMCZYK, BG (reprint author), UNIV MICHIGAN,ANN ARBOR,MI 48109, USA. NR 21 TC 10 Z9 10 U1 0 U2 2 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0950-0839 J9 PHIL MAG LETT JI Philos. Mag. Lett. PD FEB PY 1993 VL 67 IS 2 BP 85 EP 88 DI 10.1080/09500839308243856 PG 4 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA KP049 UT WOS:A1993KP04900004 ER PT J AU ZHU, YM BUDHANI, RC CAI, ZX WELCH, DO SUENAGA, M YOSHIZAKI, R IKEDA, H AF ZHU, YM BUDHANI, RC CAI, ZX WELCH, DO SUENAGA, M YOSHIZAKI, R IKEDA, H TI STRUCTURE OF AU-24+-ION-IRRADIATION-INDUCED DEFECTS IN HIGH-T(C) SUPERCONDUCTORS SO PHILOSOPHICAL MAGAZINE LETTERS LA English DT Article ID THERMAL-CONDUCTIVITY AB Irradiation of YBa2Cu3O7-delta and Bi2Sr2Ca3Cu3Ox superconductors with 300 MeV gold ions leads to the formation of columnar defects along the ion trajectory. These columns consist of amorphized material within the envelope of a displacement-strain field which propagates into the crystal lattice. The morphology of the defects shows a characteristic shape and size depending on the direction of the incident ion with respect to the crystallographic planes of the superconductors. The defects have a circular symmetry for the ion beam directed perpendicular to the a-b plane, while they are larger and elliptical when the beam is parallel to the a-c or b-c planes. A simple model based on the idea of ion-induced localized melting and anisotropic thermal conductivity of these materials helps us to understand the size and shape of these defects. C1 UNIV TSUKUBA,INST APPL PHYS,TSUKUBA 305,JAPAN. UNIV TSUKUBA,CTR CRYOGEN,TSUKUBA 305,JAPAN. RP ZHU, YM (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV MAT SCI,UPTON,NY 11973, USA. NR 12 TC 23 Z9 23 U1 0 U2 1 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0950-0839 J9 PHIL MAG LETT JI Philos. Mag. Lett. PD FEB PY 1993 VL 67 IS 2 BP 125 EP 130 DI 10.1080/09500839308243862 PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA KP049 UT WOS:A1993KP04900010 ER PT J AU BLAZEK, ER ALDERFER, JL TABACZYNSKI, WA STAMOUDIS, VC CHURCHILL, ME PEAK, JG PEAK, MJ AF BLAZEK, ER ALDERFER, JL TABACZYNSKI, WA STAMOUDIS, VC CHURCHILL, ME PEAK, JG PEAK, MJ TI A 5-4 PYRIMIDINE-PYRIMIDONE PHOTOPRODUCT PRODUCED FROM MIXTURES OF THYMINE AND 4-THIOURIDINE IRRADIATED WITH 334 NM LIGHT SO PHOTOCHEMISTRY AND PHOTOBIOLOGY LA English DT Article ID INTRINSIC PHOTOAFFINITY PROBE; ESCHERICHIA-COLI; TRANSFER-RNA; ULTRAVIOLET-LIGHT; NEAR-ULTRAVIOLET; CROSS-LINKING; GROWTH DELAY; DNA; OLIGODEOXYNUCLEOTIDES; PHOTOCHEMISTRY AB The nucleoside 4-thiouridine, present in some bacterial tRNA species, is known to be a chromophore and a target for near-UV light-induced growth delay and also mediates both photoprotection and near-UV cell killing in various bacterial strains. To investigate the photoreaction of 4-thiouridine with DNA or its precursors, we irradiated aqueous mixtures of thymine and 4-thiouridine with 334 nm light and then separated photoproducts using two or more stages of reversed-phase high performance liquid chromatography. The two equally abundant major photoproducts were analyzed by UV absorbance spectrophotometry, fast-atom bombardment and electron-impact mass spectrometry, and H-1- and C-13-NMR spectroscopy, and have been identified as two diastereomers of 6-hydroxy-5-[1-(beta-D-erythro-pentofuranosyl)-4'-pyrimidin-2'-one]dihydrothymine (0(6)hThy[5-4]Pdo), of molecular weight = 370.32. These two diastereomers, although stable at room temperature or below, are interconvertible by heating (90-degrees-C for 5 min) in aqueous solution. The possible biological significance of this photoproduct is discussed, and an application as a crosslinker for oligonucleotides to selectively block replication is suggested. C1 ARGONNE NATL LAB,DIV BIOL & MED RES,ARGONNE,IL 60439. NEW YORK STATE DEPT HLTH,ROSWELL PK MEM INST,DEPT BIOPHYS,BUFFALO,NY 14263. ARGONNE NATL LAB,DEPT ENVIRONM SAFETY & HLTH,ARGONNE,IL 60439. RP BLAZEK, ER (reprint author), RUSH PRESBYTERIAN ST LUKES MED CTR,DEPT THERAPEUT RADIOL,1653 W CONGRESS PKWY,CHICAGO,IL 60612, USA. FU NCI NIH HHS [2 R01-CA37848, 1 R01-CA34492, 3 R01-CA39027] NR 46 TC 6 Z9 6 U1 0 U2 1 PU AMER SOC PHOTOBIOLOGY PI AUGUSTA PA BIOTECH PARK, 1021 15TH ST, SUITE 9, AUGUSTA, GA 30901-3158 SN 0031-8655 J9 PHOTOCHEM PHOTOBIOL JI Photochem. Photobiol. PD FEB PY 1993 VL 57 IS 2 BP 255 EP 265 DI 10.1111/j.1751-1097.1993.tb02284.x PG 11 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA KP079 UT WOS:A1993KP07900007 PM 8451287 ER PT J AU AKERA, H MACDONALD, AH NORMAN, MR AF AKERA, H MACDONALD, AH NORMAN, MR TI LANDAU-LEVEL QUANTIZATION AND SUPERCONDUCTIVITY SO PHYSICA B LA English DT Article; Proceedings Paper CT 33RD YAMADA CONF / 10TH INTERNATIONAL CONF ON THE APPLICATION OF HIGH MAGNETIC FIELDS IN SEMICONDUCTOR PHYSICS ( HMSP 92 ) CY AUG 03-07, 1992 CL CHIBA, JAPAN SP YAMADA SCI FDN, GOVT CHIBA PREFECTURE, GOVT TOMIURA CITY ID MAGNETIC-FIELDS; LATTICE AB A microscopic calculation of vortex-lattice states in two-dimensional electron systems at strong magnetic fields is made taking fully the Landau level quantization into account within the mean field scheme. Results of the order parameter and the local density of states are presented both in the limit of pairing in a single Landau level and in the semiclassical regime of weaker fields, and differences from the Abrikosov vortex state are discussed. C1 INDIANA UNIV,DEPT PHYS,BLOOMINGTON,IN 47401. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP AKERA, H (reprint author), HOKKAIDO UNIV,FAC ENGN,SAPPORO,HOKKAIDO 060,JAPAN. RI Norman, Michael/C-3644-2013 NR 15 TC 7 Z9 7 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD FEB PY 1993 VL 184 IS 1-4 BP 337 EP 340 DI 10.1016/0921-4526(93)90377-I PG 4 WC Physics, Condensed Matter SC Physics GA KU621 UT WOS:A1993KU62100068 ER PT J AU SHAKED, H JORGENSEN, JD HINKS, DG HITTERMAN, RL DABROWSKI, B AF SHAKED, H JORGENSEN, JD HINKS, DG HITTERMAN, RL DABROWSKI, B TI STRUCTURAL-PROPERTIES OF YBA2CU3O6+X AT ELEVATED-TEMPERATURES IN CONTROLLED OXYGEN ATMOSPHERES SO PHYSICA C LA English DT Article ID TETRAGONAL PHASE-TRANSITION; NEUTRON POWDER DIFFRACTION; X-RAY-SCATTERING; DEFICIENT YBA2CU3O7-DELTA; ELECTRON-DIFFRACTION; PARTIAL-PRESSURE; RANGE ORDER; EQUILIBRIUM; DIAGRAM; SUPERCONDUCTIVITY AB The structural properties of YBa2Cu3O6+x have been determined at elevated temperatures in controlled oxygen partial pressure by in situ neutron powder diffraction. Diffraction data were obtained as a function of the oxygen partial pressure at constant temperatures of 490-degrees-C and 440-degrees-C. These data, taken in thermodynamic equilibrium, provide information that cannot be obtained from metastable oxygen-deficient samples studied at room temperature. For example, the orthorhombic-to-tetragonal phase transition is observed to be continuous, as expected for a second order phase transition. Sequential diffraction measurements following each change in experimental conditions were used to monitor the approach to equilibrium by observing changes in lattice constants. A considerable increase in equilibration time (following a step-like change in oxygen partial pressure) was found as the orthorhombic-to-tetragonal phase transition was approached. No phases other than the high-temperature orthorhombic (ortho-I) and tetragonal phases were observed. C1 BEN GURION UNIV NEGEV,NUCL RES CTR NEGEV,DEPT PHYS,IL-84105 BEER SHEVA,ISRAEL. RP SHAKED, H (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 47 TC 28 Z9 28 U1 1 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 FEB 1 PY 1993 VL 205 IS 3-4 BP 225 EP 239 DI 10.1016/0921-4534(93)90387-6 PG 15 WC Physics, Applied SC Physics GA KL682 UT WOS:A1993KL68200002 ER PT J AU LI, BA WONG, CY AF LI, BA WONG, CY TI NUCLEAR STOPPING POWER AND RECOILING NUCLEONS SO PHYSICA SCRIPTA LA English DT Article ID HEAVY-ION COLLISIONS; MULTI-CHAIN MODEL; ULTRARELATIVISTIC ENERGIES; FRAGMENTATION; MOMENTUM; DYNAMICS AB We examine the use of the momentum distribution of recoiling nucleons to study the stopping power law of nuclear matter for incident nucleons with high energies. The dependence of the momentum distribution on the stopping power index is studied in detail for both leading nucleons and recoiling nucleons in p + d reactions. There are two regions where the momentum distribution of the recoiling nucleons is sensitive to the stopping power law. This sensitivity can be used to study the stopping power law experimentally. C1 HAHN MEITNER INST KERNFORSCH BERLIN GMBH,BEREICH KERN & STRAHLENPHYS,W-1000 BERLIN 39,GERMANY. RP LI, BA (reprint author), OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831, USA. NR 28 TC 6 Z9 8 U1 1 U2 1 PU ROYAL SWEDISH ACAD SCIENCES PI STOCKHOLM PA PUBL DEPT BOX 50005, S-104 05 STOCKHOLM, SWEDEN SN 0281-1847 J9 PHYS SCRIPTA JI Phys. Scr. PD FEB PY 1993 VL 47 IS 2 BP 151 EP 159 DI 10.1088/0031-8949/47/2/004 PG 9 WC Physics, Multidisciplinary SC Physics GA KR416 UT WOS:A1993KR41600004 ER PT J AU FLA, T WYLLER, J AF FLA, T WYLLER, J TI NONLINEAR MODULATED WAVES NEAR MARGINAL STATE OF INSTABILITY SO PHYSICA SCRIPTA LA English DT Article ID LINEAR SCHRODINGER-EQUATION; BENJAMIN-FEIR INSTABILITY; ALFVEN SOLITONS; ION WAVE; RECURRENCE; PLASMA AB We formulate a model equation for nonlinear modulated waves valid near the marginal state of instability. This equation we henceforth call the Extended Derivative Nonlinear Schrodinger equation (EDNLS). EDLNS has the same form as the Derivative Nonlinear Schrodinger equation (DNLS) except for a quintic nonlinear term which in special cases might be zero. EDNLS has three conservation laws which correspond to the first three of the conservation laws of the DNLS equation. We find the following criterion for modulational instability, k0 > -2a0(2)sigma. (Here k0, a0 and sigma are the normalized background wavenumber and amplitude and the coefficient for the quintic term in the EDNLS equation.) In addition we classify the solitary and cnoidal waves for the EDNLS equation and study the nonlinear behavior of the modulational instability. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV LULEA,DEPT APPL MATH,S-95187 LULEA,SWEDEN. NR 23 TC 6 Z9 6 U1 0 U2 0 PU ROYAL SWEDISH ACAD SCIENCES PI STOCKHOLM PA PUBL DEPT BOX 50005, S-104 05 STOCKHOLM, SWEDEN SN 0281-1847 J9 PHYS SCRIPTA JI Phys. Scr. PD FEB PY 1993 VL 47 IS 2 BP 214 EP 220 DI 10.1088/0031-8949/47/2/015 PG 7 WC Physics, Multidisciplinary SC Physics GA KR416 UT WOS:A1993KR41600015 ER PT J AU STAPP, HP AF STAPP, HP TI SIGNIFICANCE OF AN EXPERIMENT OF THE GREENBERGER-HORNE-ZEILINGER KIND SO PHYSICAL REVIEW A LA English DT Article AB Restrictive conditions on the class of allowed physical theories are drawn from the assumption that the predictions of quantum theory are valid for an experiment of the kind proposed by Greenberger, Horne, and Zeilinger [in Bell's Theorem, Quantum Theory and Conceptions of the Universe, edited by M. Kafatos (Kluwer Academic, Dordrecht, 1989)]. It is shown that no theory can be compatible with the following four conditions. (1) The choices to be made by the three experimenters can be treated, in this context, as three independent free variables. (2) For each of the six possible local measurements under consideration, if that local measurement were to be performed, then exactly one of the alternative possible outcomes of this measurement must be selected as the actual outcome. (3) For each triad of measurements in a certain set of possible triads, if that triad were to be performed, then the corresponding triad of selected outcomes must satisfy the correlation condition predicted by quantum theory. (4) For each of the six possible local measurements, if that local measurement were to be performed, then the selected outcome must, according to the theory, be independent of which two experiments will later, in some frame of reference, be performed in the other two regions. RP STAPP, HP (reprint author), LAWRENCE BERKELEY LAB,DIV PHYS,THEORET PHYS GRP,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 22 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 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD FEB PY 1993 VL 47 IS 2 BP 847 EP 853 DI 10.1103/PhysRevA.47.847 PG 7 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KV979 UT WOS:A1993KV97900020 ER PT J AU PATTERSON, CW AF PATTERSON, CW TI CORRECTIONS TO THE BORN-OPPENHEIMER APPROXIMATION FOR A HARMONIC-OSCILLATOR SO PHYSICAL REVIEW A LA English DT Article ID ION AB We derive simple expressions for the energy corrections to the Born-Oppenheimer approximation valid for a harmonic oscillator. We apply these corrections to the electronic and rotational ground state of H-2+ and show that the diabatic energy corrections are linearly dependent on the vibrational quantum numbers as seen in recent variational calculations [D. A. Kohl and E. J. Shipsey, J. Chem. Phys. 84, 2707 (1986)]. RP PATTERSON, CW (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 10 TC 1 Z9 1 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD FEB PY 1993 VL 47 IS 2 BP 879 EP 883 DI 10.1103/PhysRevA.47.879 PG 5 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KV979 UT WOS:A1993KV97900024 ER PT J AU CHENG, S BERRY, HG DUNFORD, RW GEMMELL, DS KANTER, EP ZABRANSKY, BJ LIVINGSTON, AE CURTIS, LJ BAILEY, J NOLEN, JA AF CHENG, S BERRY, HG DUNFORD, RW GEMMELL, DS KANTER, EP ZABRANSKY, BJ LIVINGSTON, AE CURTIS, LJ BAILEY, J NOLEN, JA TI BRANCHING RATIO FOR THE M1 DECAY OF THE 2(2)S1/2 STATE IN ONE-ELECTRON KRYPTON SO PHYSICAL REVIEW A LA English DT Article ID SI(LI) DETECTORS; 22S1/2 STATE; LAMB SHIFT; RATES; HYDROGENLIKE; ATOMS; IONS; HELIUMLIKE; EFFICIENCY; ARGON AB We report a measurement of the lifetime of the 2 2S1/2 state in one-electron krypton and a direct determination of the branching ratio for the M1 decay of this state. The branching-ratio measurement provides a sensitive test of the relativistic corrections to the decay rate. The lifetime measurement yields (36.8+/-1.4) ps and the branching ratio is found to be 0.356(15), both in good agreement with the theoretical values of 37.008 ps and 0.3643, respectively. From these measurements we also deduce the corresponding magnetic-dipole decay rate A(M1) = 9.68(55) X 10(9) s-1 and the two-photon decay rate A2E1 = 1.750(78) X 10(10) s-1. C1 UNIV NOTRE DAME,DEPT PHYS,NOTRE DAME,IN 46556. MICHIGAN STATE UNIV,NATL SUPERCONDUCTING CYCLOTRON LAB,E LANSING,MI 48824. RP CHENG, S (reprint author), ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439, USA. NR 31 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 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD FEB PY 1993 VL 47 IS 2 BP 903 EP 910 DI 10.1103/PhysRevA.47.903 PG 8 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KV979 UT WOS:A1993KV97900028 ER PT J AU FONTES, CJ SAMPSON, DH ZHANG, HL AF FONTES, CJ SAMPSON, DH ZHANG, HL TI INCLUSION OF THE GENERALIZED BREIT INTERACTION IN EXCITATION OF HIGHLY CHARGED IONS BY ELECTRON-IMPACT SO PHYSICAL REVIEW A LA English DT Article ID ATOMIC-STRUCTURE; CROSS-SECTIONS; HEAVY ATOMS; SCATTERING; SPECTRA; AUGER AB The generalized Breit interaction is included in the scattering matrix elements when determining collision strengths for electron-impact excitation of highly charged ions. We use a relativistic distorted-wave approach that employs a Dirac-Fock-Slater potential to calculate the free-electron wave functions. This same potential is used to calculate the atomic-structure data. Collision strengths are presented for H-like, He-like, and Li-like ions for a range of Z values and impact-electron energies. Good agreement is obtained when comparing to the few existing calculations for hydrogenic ions. The effect of including the interaction is found to be small for ions with Z almost-equal-to 26, but increases steadily with Z. Changes of nearly 70% are observed for Z = 92. Effects for the more complex He-like and Li-like ions are greater than for the hydrogenic analogs for the entire range of Z values considered. The accuracy of some simpler forms of the Breit interaction is also discussed. C1 PENN STATE UNIV,DEPT PHYS & ASTRON,UNIV PK,PA 16802. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP FONTES, CJ (reprint author), PENN STATE UNIV,DEPT PHYS,UNIV PK,PA 16802, USA. NR 34 TC 46 Z9 47 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 FEB PY 1993 VL 47 IS 2 BP 1009 EP 1022 DI 10.1103/PhysRevA.47.1009 PG 14 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KV979 UT WOS:A1993KV97900042 ER PT J AU XU, J HULETT, LD LEWIS, TA DONOHUE, DL MCLUCKEY, SA GLISH, GL AF XU, J HULETT, LD LEWIS, TA DONOHUE, DL MCLUCKEY, SA GLISH, GL TI POSITRON-INDUCED DISSOCIATION OF ORGANIC-MOLECULES SO PHYSICAL REVIEW A LA English DT Article ID IONIZATION MASS-SPECTROMETRY; ENERGY-DEPENDENCE; IONS; FRAGMENTATION; ATOMS AB We have measured positron-ionization time-of-flight mass spectra of butylbenzene, decane, tetraethylsilane, and other organic molecules as a function of the positron kinetic energy. Our data show that fragment ions are produced at onset energies above the positronium- (Ps) formation threshold, while the molecular ions are formed starting at the Ps threshold. The onset energies have been found to depend strongly on the nature of the fragment and to be equal to the dissociation energy of the fragmentation reaction. Decreases in the molecular-ion populations in the mass spectra were observed to be accompanied by increases in fragment-ion populations. A two-step process, stripping followed by unimolecular dissociation, is proposed to be responsible for the production of the fragment ions. The degree of dissociation can be controlled by selecting the positron incident energy. RP XU, J (reprint author), OAK RIDGE NATL LAB,PO 2008,MS 6142,OAK RIDGE,TN 37831, USA. RI McLuckey, Scott/B-2203-2009 OI McLuckey, Scott/0000-0002-1648-5570 NR 23 TC 21 Z9 21 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD FEB PY 1993 VL 47 IS 2 BP 1023 EP 1030 DI 10.1103/PhysRevA.47.1023 PG 8 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KV979 UT WOS:A1993KV97900043 ER PT J AU HALLETT, WA DIETRICH, DD SILVER, JD AF HALLETT, WA DIETRICH, DD SILVER, JD TI MEASUREMENT OF 1S2S(3)S1-1S2P(3)P2,0 WAVELENGTHS IN HELIUM-LIKE NEON SO PHYSICAL REVIEW A LA English DT Article ID MULTICONFIGURATION DIRAC-FOCK; ARGON RECOIL IONS; LAMB SHIFT; 2-ELECTRON IONS; ISOELECTRONIC SEQUENCE; 23S-23P TRANSITIONS; LASER SPECTROSCOPY; 2S-2P TRANSITIONS; SELF-ENERGY; TESTS AB We have measured the vacuum-ultraviolet 1s2s3S1-1s2p3P2,0 transition wavelengths in heliumlike neon by photographic spectroscopy of a recoil-ion source. The results are 1248.10+/-0.01 and 1277.74+/-0.04 angstrom, respectively, and are a sensitive test of present relativistic and quantum-electrodynamic calculations. Earlier photographic data have been reanalyzed for comparison with these results. C1 LAWRENCE LIVERMORE NATL LAB,DIV HIGH TEMP PHYS,LIVERMORE,CA 94550. RP HALLETT, WA (reprint author), UNIV OXFORD,DEPT PHYS,CLARENDON LAB,PARKS RD,OXFORD OX1 3PU,ENGLAND. NR 37 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 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD FEB PY 1993 VL 47 IS 2 BP 1130 EP 1135 DI 10.1103/PhysRevA.47.1130 PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KV979 UT WOS:A1993KV97900056 ER PT J AU CANNON, BD AF CANNON, BD TI HYPERFINE SPECTRA OF THE RADIOACTIVE ISOTOPES KR-81 AND KR-85 SO PHYSICAL REVIEW A LA English DT Article ID NUCLEAR-CHARGE RADII; RESOLUTION LASER SPECTROSCOPY; MILK RIVER AQUIFER; IONIZATION SPECTROSCOPY; 4P55P CONFIGURATION; ARC SPECTRUM; KR-I; SHIFTS; KRYPTON; SPLITTINGS AB Isotope shifts and hyperfine constants are reported for the radioactive isotopes Kr-81 and Kr-85 and the stable isotope Kr-83. The previously unreported nuclear moments of Kr-81 were determined to be mu(I) = -0.909(4) nuclear magneton and Q= +0.630(13) b from the hyperfine constants. This work increases the number of transitions for which Kr-85 hyperfine constants and isotope shifts have been measured from 1 to 4. The hyperfine anomaly for krypton reported in the previous measurement of Kr-85 hyperfine constants [H. Gerhardt et al., Hyperfine Interact. 9, 175 (1981)] is not supported by this work. The isotope shifts and hyperfine constants of Kr-83 measured in this work are in excellent agreement with previous work. Saturation spectroscopy was used to study transitions from krypton's metastable 1s5 state to the 2p9, 2p7, and 2p6 states. In saturation spectra, different line shapes were observed for the even- and odd-mass krypton isotopes. This even- versus odd-line-mass shape difference can be explained using the large cross section that has been reported for collisional transfer of the 1s5 state excitation between krypton atoms. Two-color two-photon laser-induced fluorescence was used to measure the hyperfine spectra of the 1s5-4d4' transition using the 2p9 state as the intermediate state. This technique proved to be more sensitive than saturation spectroscopy. RP CANNON, BD (reprint author), PACIFIC NW LAB, MS P8-08, POB 999, RICHLAND, WA 99352 USA. NR 45 TC 17 Z9 17 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 FEB PY 1993 VL 47 IS 2 BP 1148 EP 1158 DI 10.1103/PhysRevA.47.1148 PG 11 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KV979 UT WOS:A1993KV97900058 ER PT J AU ELLIOTT, S BEIERSDORFER, P NILSEN, J AF ELLIOTT, S BEIERSDORFER, P NILSEN, J TI MEASUREMENT OF LINE OVERLAP FOR RESONANT PHOTOPUMPING OF TRANSITIONS IN NEON-LIKE IONS BY NICKEL-LIKE IONS SO PHYSICAL REVIEW A LA English DT Article ID X-RAY LASER AB A measurement is made of the 3d-4f transition energies in the Ni-like ions Re47+, Ir49+, Pt50+, Au51+, and Bi55+ and the 2p-4d transition energies in the Ne-like ions Br25+, Kr26+, Rb27+, and Y29+ using the Livermore electron-beam ion trap. The ions studied are candidates for an x-ray laser scheme based on resonant photopumping which predicts lasing among the 3p-3s transitions in a Ne-like ion. The results of the measurements are compared to multiconfiguration Dirac-Fock calculations and systematic differences are found. The best resonance is found for the Pt-Rb pair at 2512 eV, whose energies differ by 0.4+/-0.1 eV, that is, by only 160 ppm. RP ELLIOTT, S (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 13 TC 19 Z9 19 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 FEB PY 1993 VL 47 IS 2 BP 1403 EP 1406 DI 10.1103/PhysRevA.47.1403 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KV979 UT WOS:A1993KV97900084 ER PT J AU LAGATTUTA, KJ AF LAGATTUTA, KJ TI ABOVE-THRESHOLD IONIZATION OF ATOMIC-HYDROGEN VIA RESONANT INTERMEDIATE STATES SO PHYSICAL REVIEW A LA English DT Note AB We performed state-of-the-art calculations of the emitted-electron kinetic-energy distribution for atomic hydrogen, initially in its ground state, and interacting with a linearly polarized laser field. The laser had frequencies in the one-photon-resonant (1s + omega --> 2p), two-photon-ionization regime, and irradiances between 10(13) and 10(14) W/cm2. A direct numerical solution of the time-dependent Schrodinger equation was performed using a standard method, and incorporating ''slow'' laser turn-on and turn-off pulse envelope switching functions. Structure was observed, in addition to the usual above-threshold-ionization peaks. This was deduced to be an effect of the Rabi coupling between the 1s and 2p states. The precise form of this structure was found to depend on both the laser detuning and the irradiance, but was unaffected by the turn-on transient. RP LAGATTUTA, KJ (reprint author), LOS ALAMOS NATL LAB,DIV APPL THEORET PHYS,LOS ALAMOS,NM 87545, USA. NR 13 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 FEB PY 1993 VL 47 IS 2 BP 1560 EP 1563 DI 10.1103/PhysRevA.47.1560 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KV979 UT WOS:A1993KV97900111 ER PT J AU AMENDT, P EDER, DC LONDON, RA ROSEN, MD AF AMENDT, P EDER, DC LONDON, RA ROSEN, MD TI PLASMA DISPERSION IN ULTRASHORT-PULSE X-RAY LASERS SO PHYSICAL REVIEW A LA English DT Note ID FIELD-INDUCED IONIZATION; RECOMBINATION AB The effect of plasma dispersion in longitudinally pumped x-ray lasers prepared by optical-field-induced ionization is investigated. Dispersion is shown to bound the x-ray peak intensity along the laser and to stretch the pulse in time, thus coincidentally giving a saturated output energy fluence that increases linearly with laser length as in the nondispersive regime. High output efficiencies eta > 10(-4) in Li-like Ne at 98 angstrom are thus accessible in x-ray lasing plasmas of high density n(e) > 5 X 10(20) cm-3, low temperature T(e) < 40 eV, and large radius a > 20 mum, despite significant dispersion. RP AMENDT, P (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 18 TC 7 Z9 7 U1 2 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 FEB PY 1993 VL 47 IS 2 BP 1572 EP 1575 DI 10.1103/PhysRevA.47.1572 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KV979 UT WOS:A1993KV97900114 ER PT J AU CALDWELL, CD KRAUSE, MO AF CALDWELL, CD KRAUSE, MO TI K-SHELL AUGER SPECTRUM OF ATOMIC OXYGEN SO PHYSICAL REVIEW A LA English DT Note ID PHOTOELECTRON; SPECTROSCOPY; ION AB We have observed the K-shell Auger spectrum in atomic oxygen. A total of ten transitions originating from the decay of the 4P and 2P states of the O+(1s-1) ion are identified and assigned to final states of the O2+ ion. Relative intensities for each of these transitions are obtained, allowing the extraction of the dependence of the Auger decay on the multiplet structure in both the initial and final states of this basic open-shell atom. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP CALDWELL, CD (reprint author), UNIV CENT FLORIDA,DEPT PHYS,ORLANDO,FL 32816, USA. NR 18 TC 19 Z9 19 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD FEB PY 1993 VL 47 IS 2 BP R759 EP R762 DI 10.1103/PhysRevA.47.R759 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KV979 UT WOS:A1993KV97900005 ER PT J AU EBERHARD, PH AF EBERHARD, PH TI BACKGROUND LEVEL AND COUNTER EFFICIENCIES REQUIRED FOR A LOOPHOLE-FREE EINSTEIN-PODOLSKY-ROSEN EXPERIMENT SO PHYSICAL REVIEW A LA English DT Note ID QUANTUM AB An analysis is made of the background level and counter efficiencies actually necessary to perform a loophole-free Einstein-Podolsky-Rosen experiment. Both requirements axe correlated. Photon counters do not absolutely have to have more than 82.8% efficiency if the signal-over-noise ratio is very high. RP EBERHARD, PH (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 11 TC 180 Z9 183 U1 0 U2 6 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 FEB PY 1993 VL 47 IS 2 BP R747 EP R750 DI 10.1103/PhysRevA.47.R747 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KV979 UT WOS:A1993KV97900002 ER PT J AU BALLESTEROS, C GONZALEZ, R CHEN, Y KOKTA, MR AF BALLESTEROS, C GONZALEZ, R CHEN, Y KOKTA, MR TI PRECIPITATION OF COPPER AND CHROMIUM IMPURITIES IN LANTHANUM MAGNESIUM ALUMINATE CRYSTALS DURING THERMOCHEMICAL REDUCTION SO PHYSICAL REVIEW B LA English DT Article ID SINGLE-CRYSTALS; MGO; LA1-XNDXMGAL11O19; COLLOIDS; OXIDE AB Thermochemical reduction at high temperatures has been performed on chromium-doped lanthanum magnesium aluminate crystals. Analytical transmission-electron-microscopy and optical-absorption techniques were used to characterize the crystals. Copper impurities inherently present in the crystals began to aggregate and form Cu-rich particles at 1500 K near the surface region. Below 1870 K there was no evidence of chromium precipitates being formed. However, Cr-rich particles were formed at 2020 K. The distribution of the precipitates was very inhomogeneous and the precipitates were also concentrated near the surface region. C1 UNIV CARLOS III,ESCUELA POLITECN SUPER,DEPT INGN,E-28913 LEGANES,SPAIN. OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. UNION CARBIDE CORP,WASHOUGAL,WA 98671. US DOE,DIV MAT SCI,WASHINGTON,DC 20585. RP BALLESTEROS, C (reprint author), UNIV COMPLUTENSE,DEPT FIS MAT,E-28040 MADRID,SPAIN. OI BALLESTEROS, CARMEN INES/0000-0002-8983-4751 NR 19 TC 7 Z9 7 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 FEB 1 PY 1993 VL 47 IS 5 BP 2460 EP 2464 DI 10.1103/PhysRevB.47.2460 PG 5 WC Physics, Condensed Matter SC Physics GA KL789 UT WOS:A1993KL78900004 ER PT J AU JAYANETTI, JKDS HEALD, SM TAN, Z AF JAYANETTI, JKDS HEALD, SM TAN, Z TI STRUCTURAL STUDY OF THE SN/GE INTERFACE OF HIGHLY MILLED SN-GE POWDERS SO PHYSICAL REVIEW B LA English DT Article ID ABSORPTION FINE-STRUCTURE; MOLECULAR-BEAM-EPITAXY; ALLOYS AB Structural changes occurring at the Sn/Ge interface of highly milled Sn-Ge powders were examined using extended x-ray-absorption fine-structure spectroscopy (EXAFS). X-ray diffraction and differential scanning calorimetry were also used as supporting techniques. Samples of varying compositions were prepared for analysis. Systematic changes in EXAFS and x-ray diffraction are observed with decreasing Sn concentration. These changes are found to be due to the fact that Sn appears in two different states, i.e., the metallic phase and an alpha-Sn/Ge alloy phase several monolayers thick that forms at the Sn/Ge interface. When the Sn concentration is 20 vol % the alloy phase becomes the dominant phase, leaving essentially no Sn in the normal beta-Sn phase. The results can be used to explain previously observed reductions in melting enthalpy and a low-temperature tail in the melting transition. The thermal stability of the alloy above the melting point of bulk Sn accounts for the reduction in melting enthalpy of Sn, and residual small Sn particles are the likely cause for the low-temperature tail in melting. RP BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. NR 23 TC 2 Z9 2 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1993 VL 47 IS 5 BP 2465 EP 2472 DI 10.1103/PhysRevB.47.2465 PG 8 WC Physics, Condensed Matter SC Physics GA KL789 UT WOS:A1993KL78900005 ER PT J AU GUTHOFF, F PETRY, W STASSIS, C HEIMING, A HENNION, B HERZIG, C AF GUTHOFF, F PETRY, W STASSIS, C HEIMING, A HENNION, B HERZIG, C TI PHONON-DISPERSION OF BCC LA SO PHYSICAL REVIEW B LA English DT Article ID GROUP-IV METALS; NEUTRON-SCATTERING; LATTICE-DYNAMICS; OMEGA-PHASE; ZR; CURVES AB The phonon-dispersion curves of the high-temperature bcc phase of La (gamma-La) have been measured at 1163 K. A characteristic valley of transverse and low-energy phonons extends along the [xixi0] and [xixi2xi] propagation directions. The eigenvectors of these modes are in the direction of the displacements needed for phase transitions to low-temperature close-packed structures. On the one hand they are indicative of the low potential barrier of the bcc phase for displacements toward these close-packed structures, whereas on the other hand the bcc structure is stabilized by the contribution of these low-energy modes to the lattice entropy. All these modes are strongly damped and have lifetimes of a few vibrational periods. Interference effects due to multiphonons can be the origin of the observed pronounced alterations of the one-phonon scattering law. C1 UNIV MUNSTER,INST MET FORSCH,W-4400 MUNSTER,GERMANY. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. CENS,LAB LEON BRILLOUIN,F-91191 GIF SUR YVETTE,FRANCE. RP GUTHOFF, F (reprint author), INST MAX VON LAUE PAUL LANGEVIN,BOITE POSTALE 165,F-38042 GRENOBLE,FRANCE. RI Petry, Winfried/K-4998-2016 OI Petry, Winfried/0000-0001-5208-7070 NR 23 TC 26 Z9 26 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1993 VL 47 IS 5 BP 2563 EP 2572 DI 10.1103/PhysRevB.47.2563 PG 10 WC Physics, Condensed Matter SC Physics GA KL789 UT WOS:A1993KL78900018 ER PT J AU LI, Q SUENAGA, M KIMURA, T KISHIO, K AF LI, Q SUENAGA, M KIMURA, T KISHIO, K TI MAGNETIC PENETRATION DEPTH OF (LA1-XSRX)2CUO4 SINGLE-CRYSTALS SO PHYSICAL REVIEW B LA English DT Article ID REVERSIBLE MAGNETIZATION; TRANSITION; YBA2CU3O7-DELTA; SUPERCONDUCTORS; BI2SR2CACU2O8; TRANSPORT; TC AB We have performed magnetization measurements on a series of high-quality, large single crystals of (La1-xSrx)2CuO4 over a composition range of x = 0.05-0.10, with magnetic fields parallel to the c axis. In order to avoid the large fluctuation effects near T(c) in the analysis of the magnetization of these layered superconductors, a method of data analysis, based on the variational model developed by Hao and Clem, is used for the determination of the magnetic penetration depth lambda(ab)(T) of this family. The conventional London approximation for the determination of lambda(T) from mixed-state magnetization isotherms M (H, T) is also reevaluated, and found generally to overestimate lambda(ab)(T) of (La1-xSrx)2CuO4 by as much as 20%. Our derived values of lambda(ab)(0) by the Hao-Clem model shows a minimum for the crystal (x = 0.077) having the highest T(c)(= 35.05 K). This minimum value of lambda(ab)(0) (= 2545+/-40 angstrom) is in agreement with the earlier reported value of lambda(0) (approximately 2500 angstrom) for a polycrystalline sample of (La1-xSrx)2CuO4 with x = 0.075 obtained by using the muon-spin-relaxation technique. C1 UNIV TOKYO,DEPT IND CHEM,BUNKYO KU,TOKYO 113,JAPAN. RP LI, Q (reprint author), BROOKHAVEN NATL LAB,DIV MAT SCI,UPTON,NY 11973, USA. NR 26 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 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1993 VL 47 IS 5 BP 2854 EP 2860 DI 10.1103/PhysRevB.47.2854 PG 7 WC Physics, Condensed Matter SC Physics GA KL789 UT WOS:A1993KL78900055 ER PT J AU HARSHMAN, DR BRANDT, EH FIORY, AT INUI, M MITZI, DB SCHNEEMEYER, LF WASZCZAK, JV AF HARSHMAN, DR BRANDT, EH FIORY, AT INUI, M MITZI, DB SCHNEEMEYER, LF WASZCZAK, JV TI LONGITUDINAL DISORDERING OF VORTEX LATTICES IN ANISOTROPIC SUPERCONDUCTORS SO PHYSICAL REVIEW B LA English DT Note ID MUON-SPIN-ROTATION; HIGH-TC SUPERCONDUCTORS; PENETRATION DEPTH; SINGLE-CRYSTAL; II SUPERCONDUCTORS; BI2SR2CACU2O8 AB Vortex disordering in superconducting crystals is shown to be markedly sensitive to penetration-depth anisotropy. At low temperature and high magnetic field, the muon-spin-rotation spectra for the highly anisotropic Bi2Sr2CaCu2O8+delta material are found to be anomalously narrow and symmetric about the applied field, in a manner consistent with a layered vortex sublattice structure with pinning-induced misalignment between layers. In contrast, spectra for the less-anisotropic YBa2Cu3O7-delta compounds taken at comparable fields are broader and asymmetric, showing that the vortex lattices are aligned parallel to the applied-field direction. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598. RP HARSHMAN, DR (reprint author), AT&T BELL LABS,MURRAY HILL,NJ 07974, USA. RI Mitzi, David/B-6260-2012 OI Mitzi, David/0000-0001-5189-4612 NR 27 TC 33 Z9 33 U1 3 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 FEB 1 PY 1993 VL 47 IS 5 BP 2905 EP 2908 DI 10.1103/PhysRevB.47.2905 PG 4 WC Physics, Condensed Matter SC Physics GA KL789 UT WOS:A1993KL78900067 ER PT J AU ALEXANDER, DE WAS, GS AF ALEXANDER, DE WAS, GS TI THERMAL-SPIKE TREATMENT OF ION-INDUCED GRAIN-GROWTH - THEORY AND EXPERIMENTAL COMPARISON SO PHYSICAL REVIEW B LA English DT Article ID THIN-FILMS; METAL-FILMS; IMPLANTATION; BOMBARDMENT AB Grain growth commonly observed during heavy-ion irradiation of initially fine-grained (less-than-or-equal-to 100 angstrom diameter) thin films is modeled as a thermal-spike phenomenon in which temperature spikes caused by ions and recoils induce atomic jumps across grain boundaries, promoting boundary migration. In elemental and homogeneous alloy systems, in which grain growth is driven solely by the reduction of boundary surface area, the model predicts that the ion-induced grain-boundary mobility is linearly proportional to the quantity, F(D)2/DELTAH(coh)3, in which F(D) is the ion and recoil energy deposited in elastic collisions and DELTAH(coh) is the cohesive energy of the target. The model was evaluated with respect to data from two previously published ion-induced grain-growth experiments on elemental and coevaporated alloy films. The results were consistent with the thermal-spike model. Combining analytical results of the model with the experimental data it was possible to determine the value of the proportionality constant beta relating the cohesive energy to the activation energy Q for grain growth (Q = -betaDELTAH(coh)). The value of beta for the coevaporated and elemental films, respectively, was 0.07 and 0.15, which is less than or about equal to the value previously determined for the thermal-spike treatment of ion beam mixing (beta(IM) = 0.14). The smaller value of beta determined for the coevaporated films is consistent with the idea that atom migration across grain boundaries is easier than migration within the lattice. The thermal-spike treatment was also applied to ion-induced grain growth in multilayer films. The presence of concentration gradients in these systems adds another driving force affecting grain growth. In addition, the influence of the heat of mixing (DELTAH(mix)) on atomic mobility and boundary migration was incorporated in the model via a Darken effect. C1 UNIV MICHIGAN,DEPT NUCL ENGN,ANN ARBOR,MI 48109. RP ALEXANDER, DE (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 32 TC 60 Z9 60 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 FEB 1 PY 1993 VL 47 IS 6 BP 2983 EP 2994 DI 10.1103/PhysRevB.47.2983 PG 12 WC Physics, Condensed Matter SC Physics GA KM953 UT WOS:A1993KM95300004 ER PT J AU BALAKRISHNAN, R BISHOP, AR DANDOLOFF, R AF BALAKRISHNAN, R BISHOP, AR DANDOLOFF, R TI ANHOLONOMY OF A MOVING SPACE CURVE AND APPLICATIONS TO CLASSICAL MAGNETIC CHAINS SO PHYSICAL REVIEW B LA English DT Article ID CONTINUUM SPIN SYSTEM; BERRY PHASE; SOLITONS; FERROMAGNETS; DYNAMICS AB The subject of space curves finds many applicatons in physics such as optical fibers, magnetic spin chains, and vortex filaments in a fluid. We show that the time evolution of a space curve is associated with a geometric phase. Using the concept of Fermi-Walker parallel transport, we show that this phase arises because of the path dependence of the rotation of the natural Frenet-Serret triad as one moves along the curve. We employ Lamb's formalism for space-curve dynamics to derive an expression for the anholonomy density and the geometric phase for a general time evolution. This anholonomy manifests itself as a gauge potential with a monopolelike structure in the space of the tangent vector to the space curve. Our classical approach is amenable to a quantum generalization, which can prove useful in applications. We study the application of our constructive formalism to ferromagnetic and antiferromagnetic (classical) spin chains by first presenting certain classes of exact, physically interesting solutions to these nonlinear dynamical systems and then computing the corresponding geometric phases. C1 LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. UNIV CERGY PONTOISE,PHYS GRP,F-95806 CERGY,FRANCE. RP BALAKRISHNAN, R (reprint author), INST MATH SCI,MADRAS 600113,INDIA. NR 27 TC 29 Z9 29 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1993 VL 47 IS 6 BP 3108 EP 3117 DI 10.1103/PhysRevB.47.3108 PG 10 WC Physics, Condensed Matter SC Physics GA KM953 UT WOS:A1993KM95300022 ER PT J AU BONI, P MOOK, HA MARTINEZ, JL SHIRANE, G AF BONI, P MOOK, HA MARTINEZ, JL SHIRANE, G TI COMPARISON OF THE PARAMAGNETIC SPIN FLUCTUATIONS IN NICKEL WITH ASYMPTOTIC RENORMALIZATION-GROUP THEORY SO PHYSICAL REVIEW B LA English DT Article ID DYNAMICAL CORRELATION-FUNCTION; TEMPERATURE-DEPENDENCE; ISOTROPIC FERROMAGNETS; NEUTRON-SCATTERING; DIPOLAR FERROMAGNETS; CURIE-POINT; HEISENBERG-FERROMAGNET; MAGNETIC EXCITATIONS; SHAPE FUNCTIONS; TC AB The paramagnetic spin fluctuations in Ni have been investigated at small momentum q and energy transfer HBARomega by means of inelastic-neutron-scattering techniques. For fixed energy transferred from the neutron to the spin system [S(q,omega=const)], peaks at finite momentum are observed. Their positions are very sensitive to the low-intensity parts of the magnetic cross section. The results are compared with an analytical expression for the dynamical correlation function for an isotropic ferromagnet introduced by Iro. The agreement with the theory is good near T(c) for excitation energies 1 meV less-than-or-equal-to HBARomega < k(B)T(c) congruent-to 50 meV. Further away from T(c) serious discrepancies occur, mainly because the spin fluctuations slow down more quickly than expected on the basis of mode-mode coupling or renormalization-group theory. If the experimentally determined scaling function is used, then the results can be well parametrized. The additional slowing down, which affects also the line shape at T(c), is most likely caused by the interaction of the 3d moments with the conduction electrons, i.e., by an itinerant effect. We have also extracted from our data the asymptotic behavior of the scattering function at very large energy transfers, i.e., S(I)(q,omega-->infinity) is-proportional-to omega-(z+4)/z at T(c) and the results are in reasonable agreement with renormalization-group theory. No indications for a breakdown of dynamical scaling has been found within the q and E ranges investigated. C1 PAUL SCHERRER INST,VILLIGEN,SWITZERLAND. OAK RIDGE NATL LAB,OAK RIDGE,TN 37830. UNIV AUTONOMA MADRID,INST CIENCIA MAT,E-28034 MADRID,SPAIN. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP BONI, P (reprint author), ETH,LABOR NEUTRONENSTREUUNG,CH-5232 VILLIGEN PSI,SWITZERLAND. RI Martinez, Jose/B-5371-2013 OI Martinez, Jose/0000-0001-9046-8237 NR 38 TC 14 Z9 14 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 FEB 1 PY 1993 VL 47 IS 6 BP 3171 EP 3179 DI 10.1103/PhysRevB.47.3171 PG 9 WC Physics, Condensed Matter SC Physics GA KM953 UT WOS:A1993KM95300029 ER PT J AU BARNES, T DAGOTTO, E RIERA, J SWANSON, ES AF BARNES, T DAGOTTO, E RIERA, J SWANSON, ES TI EXCITATION SPECTRUM OF HEISENBERG SPIN LADDERS SO PHYSICAL REVIEW B LA English DT Article ID HALDANE-GAP; GROUND-STATE; MONTE-CARLO; ANTIFERROMAGNET; CHAIN; SUPERCONDUCTIVITY; MODEL AB Heisenberg antiferromagnetic spin ''ladders'' (two coupled spin chains) are low-dimensional magnetic systems which for S=1/2 interpolate between half-integer-spin chains, when the chains are decoupled, and effective integer-spin one-dimensional chains in the strong-coupling limit. The spin-1/2 ladder may be realized in nature by vanadyl pyrophosphate, (VO)2P2O7. In this paper we apply strong-coupling perturbation theory, spin-wave theory, Lanczos techniques, and a Monte Carlo method to determine the ground-state energy and the low-lying excitation spectrum of the ladder. We find evidence of a nonzero spin gap for all interchain couplings J(perpendicular-to) > 0. A band of spin-triplet excitations above the gap is also analyzed. These excitations are unusual for an antiferromagnet, since their long-wavelength dispersion relation behaves as (k-k0)2 (in the strong-coupling limit J(perpendicular-to) >> J, where J is the in-chain antiferromagnetic coupling). Their band is folded, with a minimum energy at k0=pi, and a maximum between k1=pi/2 (for J(perpendicular-to)=0) and 0 (for J(perpendicular-to)=infinity). We also give numerical results for the dynamical structure factor S(q,omega), which can be determined in neutron scattering experiments. Finally, possible experimental techniques for studying the excitation spectrum are discussed. C1 OAK RIDGE NATL LAB, CTR COMPUTAT INTENS PHYS, OAK RIDGE, TN 37831 USA. FLORIDA STATE UNIV, SUPERCOMP COMPUTAT RES INST, TALLAHASSEE, FL 32306 USA. MIT, CTR THEORET PHYS, CAMBRIDGE, MA 02139 USA. FAC CIENCIA EXACTAS ROSARIO, DEPT FIS, RA-2000 ROSARIO, ARGENTINA. UNIV TENNESSEE, DEPT PHYS, KNOXVILLE, TN 37996 USA. FLORIDA STATE UNIV, CTR MAT RES & TECHNOL, DEPT PHYS, TALLAHASSEE, FL 32306 USA. RP OAK RIDGE NATL LAB, DIV PHYS, OAK RIDGE, TN 37831 USA. RI Riera, Jose/A-1234-2008 OI Riera, Jose/0000-0003-4546-1137 NR 29 TC 341 Z9 342 U1 1 U2 18 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 FEB 1 PY 1993 VL 47 IS 6 BP 3196 EP 3203 DI 10.1103/PhysRevB.47.3196 PG 8 WC Physics, Condensed Matter SC Physics GA KM953 UT WOS:A1993KM95300032 ER PT J AU ZHANG, L JAIN, JK EMERY, VJ AF ZHANG, L JAIN, JK EMERY, VJ TI IMPORTANCE OF THE LOCAL CONSTRAINT IN SLAVE-BOSON THEORIES SO PHYSICAL REVIEW B LA English DT Article ID ANDERSON MODEL; SUPERCONDUCTIVITY; EXPANSION AB Slave bosons are commonly introduced in order to implement an infinite Hubbard U by means of a local constraint. The usual starting point for investigations within this scheme is a mean-field theory in which the constraint is taken to be global. This approximate treatment of the constraint is studied in the context of a two-band Hubbard model, and it is shown that (i) the ground state has a significant number of doubly occupied sites, despite the infinite on-site repulsion in the original model, and (ii) there is an unphysical tendency for pairing. However, it is found that if the local constraint is retained for the insulator at half filling, then mean-field theory gives the correct result that the double occupancy is zero. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. RP ZHANG, L (reprint author), SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794, USA. NR 15 TC 24 Z9 24 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 FEB 1 PY 1993 VL 47 IS 6 BP 3368 EP 3373 DI 10.1103/PhysRevB.47.3368 PG 6 WC Physics, Condensed Matter SC Physics GA KM953 UT WOS:A1993KM95300053 ER PT J AU KOT, WK EDELSTEIN, NM ABRAHAM, MM BOATNER, LA AF KOT, WK EDELSTEIN, NM ABRAHAM, MM BOATNER, LA TI ELECTRON-PARAMAGNETIC RESONANCE OF PU-3+ AND CF-3+ IN SINGLE-CRYSTALS OF LUPO4 SO PHYSICAL REVIEW B LA English DT Note ID SCPO4; YPO4; RES AB Electron-paramagnetic-resonance (EPR) spectroscopy has been used to investigate the ground-state properties of the actinide ions Pu3+ (5f5) and Cf3+ (5f9) incorporated as dilute impurities in single crystals of the tetragonal-symmetry host LuPO4. The g values of the electronic ground states were determined experimentally at a sample temperature of 4 K. These values are compared to those calculated using the free-ion parameters available from previous crystal-field analyses of Pu3+ and Cf3+ ions diluted in LaCl3-host single crystals and a set of crystal-field parameters reported earlier for Cm3+ (5f7) ions in LuPO4. These crystal-field parameters were obtained from spin-Hamiltonian parameters using operator-equivalent factors and the assumption that the zero-field splitting of the ground state of the 5f7 ion is due primarily to intermediate-coupling effects. The relatively poor agreement between the experimental and calculated g values indicates that the crystal-field parameters obtained for Cm3+ in LuPO4 cannot be used to predict the correct electronic ground-state properties of the other actinide ions Pu3+ and Cf3+ in the identical host single-crystal LuPO4. Accordingly, in the case of actinide impurity ions in single crystals, there is no simple correspondence between the spin-Hamiltonian parameters and the crystal-field parameters. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP KOT, WK (reprint author), UNIV CALIF BERKELEY,DIV CHEM SCI,BERKELEY,CA 94720, USA. RI Boatner, Lynn/I-6428-2013 OI Boatner, Lynn/0000-0002-0235-7594 NR 8 TC 6 Z9 6 U1 1 U2 10 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 FEB 1 PY 1993 VL 47 IS 6 BP 3412 EP 3414 DI 10.1103/PhysRevB.47.3412 PG 3 WC Physics, Condensed Matter SC Physics GA KM953 UT WOS:A1993KM95300060 ER PT J AU CARLSON, J PANDHARIPANDE, VR SCHIAVILLA, R AF CARLSON, J PANDHARIPANDE, VR SCHIAVILLA, R TI VARIATIONAL MONTE-CARLO CALCULATIONS OF H-3 AND HE-4 WITH A RELATIVISTIC HAMILTONIAN SO PHYSICAL REVIEW C LA English DT Article ID NUCLEAR-MATTER; BINDING-ENERGY; STATE AB The two-nucleon phase shifts and deuteron properties are fitted using relativistic, (m2+p2)1/2, kinetic-energy operators to obtain realistic models of upsilon(ij), the two-nucleon interaction in the frame in which the total momentum P(ij) of the interacting pair is zero. The relativistic Hamiltonian H(R) contains the relativistic kinetic energy, upsilon(ij), and deltaupsilon(ij)(P(ij)) which describes the dependence of the interaction on the total momentum of the pair. The deltaupsilon(ij)(P(ij)) are obtained from the upsilon(ij) using relativistic mechanisms. The ground states of H-3 and He-4 are calculated using the H(R) with the variational Monte Carlo method, and the results are compared with those obtained using the nonrelativistic H(NR). Results of calculations including the three-nucleon interaction are also reported. The relativistic effects reduce the binding energies of H-3 and He-4 by approximately 0.34 and 2.02 MeV, and they do not change the momentum distribution of the nucleons in these nuclei significantly. C1 UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801. IST NAZL FIS NUCL,I-73100 LECCE,ITALY. ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439. RP CARLSON, J (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 27 TC 51 Z9 51 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 FEB PY 1993 VL 47 IS 2 BP 484 EP 497 DI 10.1103/PhysRevC.47.484 PG 14 WC Physics, Nuclear SC Physics GA KM954 UT WOS:A1993KM95400014 ER PT J AU HOREN, DJ AUBLE, RL DELCAMPO, JG SATCHLER, GR VARNER, RL BEENE, JR LUND, B BROWN, VR ANTHONY, PL MADSEN, VA AF HOREN, DJ AUBLE, RL DELCAMPO, JG SATCHLER, GR VARNER, RL BEENE, JR LUND, B BROWN, VR ANTHONY, PL MADSEN, VA TI SYSTEMATICS OF ISOSPIN CHARACTER OF TRANSITIONS TO THE 21+ AND 31- STATES IN ZR-90, ZR-92, ZR-94, ZR-96 SO PHYSICAL REVIEW C LA English DT Article ID GIANT QUADRUPOLE-RESONANCE; COUPLED-CHANNELS CALCULATIONS; EVEN-EVEN NUCLIDES; INELASTIC-SCATTERING; COULOMB-EXCITATION; CORE POLARIZATION; MATRIX-ELEMENTS; PB-208; SN-118; OCTUPOLE AB Differential cross sections for exciting the 2+ and 3- states of Zr-90, Zr-92, Zr-94, Zr-96 with 70-MeV Li-6 ions have been measured. Calculations of the cross sections have been performed using a deformed optical model potential (DOMP) with OMP deduced from fits to the elastic data, as well as a folding model with an effective nucleon-nucleon interaction with a Yukawa form factor obtained from fits to the elastic data and transition densities obtained from open-shell random phase approximation (RPA) calculations. The DOMP fits to the data yield values of M(n)/M(p) which are in good agreement with those predicted using the RPA. For the 21(1)+ states, we find M(n)/M(p) increases from less than N/Z to greater than N/Z in going from Zr-90 to Zr-96. However, for the 3(1)- states M(n)/M(p) remains less than N/Z for all cases, a result which is in disagreement with previous works. The folding model, with the RPA transition densities, provides good agreement with the 2(1)+ measurements, but underpredicts the cross sections for the 3(1) states. A reanalysis of the earlier data from excitation of these states by (a,a') reactions removes much of the apparent discrepancies between those measurements and other measurements, including the ones reported here. The localization of the Li-6 interaction is also discussed. C1 YALE UNIV,DEPT PHYS,NEW HAVEN,CT 06511. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. OREGON STATE UNIV,DEPT PHYS,CORVALLIS,OR 97331. RP HOREN, DJ (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 48 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 FEB PY 1993 VL 47 IS 2 BP 629 EP 647 DI 10.1103/PhysRevC.47.629 PG 19 WC Physics, Nuclear SC Physics GA KM954 UT WOS:A1993KM95400030 ER PT J AU WARD, H APPLEGATE, JM AUERBACH, N BECK, J JOHNSON, J KOCH, K MOORE, CF MORDECHAI, S MORRIS, CL ODONNELL, JM RAWOOLSULLIVAN, M RITCHIE, BG WATSON, DL WHITLEY, C AF WARD, H APPLEGATE, JM AUERBACH, N BECK, J JOHNSON, J KOCH, K MOORE, CF MORDECHAI, S MORRIS, CL ODONNELL, JM RAWOOLSULLIVAN, M RITCHIE, BG WATSON, DL WHITLEY, C TI SYSTEMATICS OF THE DOUBLE ISOBARIC ANALOG STATE CROSS-SECTION AT 50 MEV SO PHYSICAL REVIEW C LA English DT Article ID DOUBLE-CHARGE-EXCHANGE; PION INELASTIC-SCATTERING; NUCLEAR SHELL-MODEL; T-PI-APPROXIMATELY-292 MEV; ANGULAR-DISTRIBUTIONS; LOW-ENERGY; C-12; TRANSITIONS; EXCITATION; MASS AB Double charge exchange cross sections for 50 MeV pions to double isobaric analog states in Ca-44, Fe-56, and Nb-93 were measured. The results indicate that the effective double charge exchange operator at this energy has a strong short-range component. In addition, evidence is presented tending to implicate isospin mixing as the mechanism for excitation of the analog of the antianalog in Nb-93. C1 BEN GURION UNIV NEGEV,IL-84105 BEER SHEVA,ISRAEL. UNIV YORK,YORK YO1 5DD,N YORKSHIRE,ENGLAND. TEL AVIV UNIV,IL-69978 TEL AVIV,ISRAEL. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NEW MEXICO STATE UNIV,LAS CRUCES,NM 88003. UNIV TEXAS,AUSTIN,TX 78712. RP WARD, H (reprint author), KANTONSSPITAL,CH-8006 ZURICH,SWITZERLAND. NR 37 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 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD FEB PY 1993 VL 47 IS 2 BP 687 EP 692 DI 10.1103/PhysRevC.47.687 PG 6 WC Physics, Nuclear SC Physics GA KM954 UT WOS:A1993KM95400036 ER PT J AU CHRISTIE, WB OLSON, DL TULL, CE BRADY, FP GRIM, GP OSBORNE, JH PARTLAN, ML ROMERO, JL CHANG, J FUNG, SY KANG, J ZHANG, S KEANE, D BEAVIS, D DARDENNE, Y AF CHRISTIE, WB OLSON, DL TULL, CE BRADY, FP GRIM, GP OSBORNE, JH PARTLAN, ML ROMERO, JL CHANG, J FUNG, SY KANG, J ZHANG, S KEANE, D BEAVIS, D DARDENNE, Y TI PION CORRELATIONS FOR 1.2A GEV LANTHANUM ON LANTHANUM SO PHYSICAL REVIEW C LA English DT Article ID HEAVY-ION COLLISIONS; NUCLEAR COLLISIONS; ABRASION-ABLATION; SOURCE PARAMETERS; INTERFEROMETRY; AR; DISTRIBUTIONS; KCL AB Results are presented for pion interferometry measurements of 1.2A GeV La+La at the Lawrence Berkeley Laboratory Heavy Ion Spectrometer System. The experiment's acceptance is at forward angles in the center-of-mass system. The fit parameters R, tau, lambda, R(perpendicular-to), and R(parallel-to) are presented. The extracted shape of the pion source is oblate. The correlation between the extracted size of the pion source and the centrality of the collision is investigated as well as the dependence of the source size on the mean momentum of the pion pairs. We conclude that the fitted radius parameters scale with mass for symmetric systems. We observe a dependence of the fitted size of the pion source on the mean momentum of the pion pairs. Comparisons are made with previous results. C1 LOUISIANA STATE UNIV,BATON ROUGE,LA 70803. UNIV CALIF DAVIS,DAVIS,CA 95616. UNIV CALIF RIVERSIDE,RIVERSIDE,CA 92521. KENT STATE UNIV,KENT,OH 44242. BROOKHAVEN NATL LAB,UPTON,NY 11973. MICHIGAN STATE UNIV,E LANSING,MI 48823. RP CHRISTIE, WB (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 28 TC 9 Z9 9 U1 3 U2 5 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 FEB PY 1993 VL 47 IS 2 BP 779 EP 787 DI 10.1103/PhysRevC.47.779 PG 9 WC Physics, Nuclear SC Physics GA KM954 UT WOS:A1993KM95400044 ER PT J AU RILEY, MA PETTERS, T SHICK, J ARCHER, DE DORING, J HOLCOMB, JW JOHNS, GD JOHNSON, TD TEKYIMENSAH, ON TABOR, SL WOMBLE, PC WOOD, VA BAKTASH, C HALBERT, ML HENSLEY, DC LEE, IY CHARITY, RJ SARANTITES, DG WITTMER, LL SIMPSON, J AF RILEY, MA PETTERS, T SHICK, J ARCHER, DE DORING, J HOLCOMB, JW JOHNS, GD JOHNSON, TD TEKYIMENSAH, ON TABOR, SL WOMBLE, PC WOOD, VA BAKTASH, C HALBERT, ML HENSLEY, DC LEE, IY CHARITY, RJ SARANTITES, DG WITTMER, LL SIMPSON, J TI HIGHLY DEFORMED BAND IN PM-136 AND THE ANOMALOUS DYNAMIC MOMENT OF INERTIA BEHAVIOR IN THE A-SIMILAR-TO-135 SUPERDEFORMED REGION SO PHYSICAL REVIEW C LA English DT Note ID RESPONSE CHARACTERISTICS; LIFETIME MEASUREMENTS; MULTIDETECTOR SYSTEM; INTRUDER BAND; MASS REGION; DEFORMATION; INSTRUMENTATION; SM-135; NUCLEI; DESIGN AB A highly deformed rotational band has been observed in the odd-odd nucleus Pm-136. This band sheds important new light on the anomalous behavior of the dynamical moments of inertia of rotational bands previously observed in the Ce-Nd-Sm A approximately 135 superdeformed region which has been a theoretical puzzle for several years. C1 OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. WASHINGTON UNIV,DEPT CHEM,ST LOUIS,MO 63130. DARESBURY LAB,SCI & ENGN RES COUNCIL,WARRINGTON WA4,ENGLAND. RP RILEY, MA (reprint author), FLORIDA STATE UNIV,DEPT PHYS,TALLAHASSEE,FL 32306, USA. NR 25 TC 14 Z9 14 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 FEB PY 1993 VL 47 IS 2 BP R441 EP R446 DI 10.1103/PhysRevC.47.R441 PG 6 WC Physics, Nuclear SC Physics GA KM954 UT WOS:A1993KM95400006 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 DIBENEDETTO, R DIMITROYANNIS, D FABBRI, M FAST, JE GIANOLI, A 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 PALLAVICINI, M PASSAGGIO, S PASTRONE, N PATRIGNANI, C PEOPLES, J PESANDO, L PETRUCCI, F PIA, MG PORDES, S RAPIDIS, PA RAY, RE REID, JD RINAUDO, G ROCUZZO, B ROSEN, JL SANTRONI, A SARMIENTO, M SAVRIE, M SCALISI, A SCHULTZ, J SETH, KK SMITH, A SMITH, GA SOZZI, M TECCHIO, L 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, D BUZZO, A CALABRESE, R CECCUCCI, A CESTER, R CHURCH, MD DALPIAZ, P DALPIAZ, PF DIBENEDETTO, R DIMITROYANNIS, D FABBRI, M FAST, JE GIANOLI, A 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 PALLAVICINI, M PASSAGGIO, S PASTRONE, N PATRIGNANI, C PEOPLES, J PESANDO, L PETRUCCI, F PIA, MG PORDES, S RAPIDIS, PA RAY, RE REID, JD RINAUDO, G ROCUZZO, B ROSEN, JL SANTRONI, A SARMIENTO, M SAVRIE, M SCALISI, A SCHULTZ, J SETH, KK SMITH, A SMITH, GA SOZZI, M TECCHIO, L TROKENHEIM, S WEBER, MF WERKEMA, SJ ZHANG, Y ZHAO, JL ZIOULAS, G ZITO, M TI MEASUREMENT OF THE J/PSI AND PSI' RESONANCE PARAMETERS IN (P)OVER-BAR ANNIHILATION SO PHYSICAL REVIEW D LA English DT Article ID ALUMINIZED MYLAR TUBES; CHARGE DIVISION; CALORIMETER; CHAMBER; FERMILAB-E760 AB We report new measurements for the mass, width, and branching ratios for the J/psi and the psi'. These charmonium states are formed exclusively in ppBAR annihilations at the Fermilab Antiproton Accumulator ring, where stochastically cooled antiprotons are brought into collision with the protons of an internal hydrogen gas jet target. The antiproton energy is precisely controlled and measured allowing an accurate measurement of the resonance parameters. From the shape of the excitation curves we find that the widths of J/psi and psi' are GAMMA(J/psi) = 99 +/- 12 +/- 6 keV and GAMMA(psi')=306+/-36+/-16 keV, and that the mass of the J/psi is 3096.87 +/- 0.03 +/- 0.03 MeV/c2. For the J/psi we obtain B(J/psi --> ppBAR)B(J/psi --> e+e-) = (1.14(-0.12)+0.16 +/- 0.10) x 10(-4); for the psi' we obtain B(psi' --> ppBAR)[B(psi' --> e+e-) + B(psi' --> J/psiX)B(J/psi --> e+e-)] = (1.17(-0.12)+0.14 +/- 0.08) x 10(-5). C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. IST NAZL FIS NUCL,I-44100 FERRARA,ITALY. UNIV FERRARA,I-44100 FERRARA,ITALY. IST NAZL FIS NUCL,I-16146 GENOA,ITALY. UNIV GENOA,I-16146 GENOA,ITALY. UNIV CALIF IRVINE,IRVINE,CA 92717. NORTHWESTERN UNIV,EVANSTON,IL 60208. IST NAZL FIS NUCL,TURIN,ITALY. UNIV TURIN,I-10124 TURIN,ITALY. RP ARMSTRONG, TA (reprint author), PENN STATE UNIV,UNIV PK,PA 16802, USA. RI Pia, Maria Grazia/C-7034-2012; Sozzi, Marco/H-1674-2011; Patrignani, Claudia/C-5223-2009; Luppi, Eleonora/A-4902-2015; Calabrese, Roberto/G-4405-2015; Pallavicini, Marco/G-5500-2012; Gianoli, Alberto/H-5544-2015 OI Pia, Maria Grazia/0000-0002-3579-9639; Sozzi, Marco/0000-0002-2923-1465; Patrignani, Claudia/0000-0002-5882-1747; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; Pallavicini, Marco/0000-0001-7309-3023; Gianoli, Alberto/0000-0002-2456-8667 NR 32 TC 71 Z9 71 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 FEB 1 PY 1993 VL 47 IS 3 BP 772 EP 783 DI 10.1103/PhysRevD.47.772 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KK819 UT WOS:A1993KK81900007 ER PT J AU LARSON, KD NOBLE, AJ BASSALLECK, B BURKHARDT, H FICKINGER, WJ HALL, JR HALLIN, AL HASINOFF, MD HORVATH, D JONES, PG LOWE, J MCINTYRE, EK MEASDAY, DF MILLER, JP ROBERTS, BL ROBINSON, DK SAKITT, M SALOMON, M STANISLAUS, S WALTHAM, CE WARNER, TM WHITEHOUSE, DA WOLFE, DM AF LARSON, KD NOBLE, AJ BASSALLECK, B BURKHARDT, H FICKINGER, WJ HALL, JR HALLIN, AL HASINOFF, MD HORVATH, D JONES, PG LOWE, J MCINTYRE, EK MEASDAY, DF MILLER, JP ROBERTS, BL ROBINSON, DK SAKITT, M SALOMON, M STANISLAUS, S WALTHAM, CE WARNER, TM WHITEHOUSE, DA WOLFE, DM TI WEAK RADIATIVE DECAY LAMBDA-]N-GAMMA AND THE RADIATIVE-CAPTURE REACTION K-P-]SIGMA(1385)GAMMA SO PHYSICAL REVIEW D LA English DT Article ID BRANCHING RATIO; ASYMMETRY PARAMETER; KAON CAPTURE; SIGMA+->P-GAMMA DECAY; HYPERON DECAYS; QUARK-MODEL; BARYONS; REANALYSIS AB The branching ratio for the A weak radiative decay LAMBDA --> ngamma has been measured. Three statistically independent results from the same experiment (Brookhaven E811) are reported here. They are combined with a previously published measurement, also from Brookhaven E811, to yield a result of (LAMBDA --> ngamma)/(LAMBDA --> anything) = (1.75+/-0.15) X 10(-3), based on 1800 events after background subtraction. This represents a factor of 75 increase in statistics over the previous world total. A comparison with recent theoretical papers shows that no existing model provides a completely satisfactory description of all data on weak radiative decays. A search is also reported for the radiative capture process K-p --> SIGMA(1385)gamma at rest. No signal was observed and an upper limit on the branching ratio of [K-p --> SIGMA(1385)gamma]/[K-p --> anything] < 4 X 10(-4) (90% C.L.) was determined. C1 UNIV BIRMINGHAM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND. BOSTON UNIV,BOSTON,MA 02215. UNIV BRITISH COLUMBIA,VANCOUVER V6T 1Z1,BC,CANADA. BROOKHAVEN NATL LAB,UPTON,NY 11973. CASE WESTERN RESERVE UNIV,CLEVELAND,OH 44106. HUNGARIAN ACAD SCI,CENT RES INST PHYS,H-1525 BUDAPEST,HUNGARY. LOS ALAMOS MESON PHYS FACIL,LOS ALAMOS,NM 87545. UNIV NEW MEXICO,ALBUQUERQUE,NM 87131. UNIV NOTTINGHAM,NOTTINGHAM NG7 2RD,ENGLAND. PRINCETON UNIV,PRINCETON,NJ 08544. TRIUMF,VANCOUVER V6T 2A3,BC,CANADA. RI Horvath, Dezso/A-4009-2011; Hallin, Aksel/H-5881-2011 NR 63 TC 7 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 FEB 1 PY 1993 VL 47 IS 3 BP 799 EP 810 DI 10.1103/PhysRevD.47.799 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KK819 UT WOS:A1993KK81900010 ER PT J AU FREEDMAN, SJ FUJIKAWA, BK NAPOLITANO, J NELSON, JE MCKEOWN, RD LESKO, KT DONAHUE, JB GARVEY, GT SANDBERG, VD CHOI, WC FAZELY, A IMLAY, RL METCALF, WJ DURKIN, LS HARPER, RW LING, TY MITCHELL, JW ROMANOWSKI, TA SMITH, ES TIMKO, M AF FREEDMAN, SJ FUJIKAWA, BK NAPOLITANO, J NELSON, JE MCKEOWN, RD LESKO, KT DONAHUE, JB GARVEY, GT SANDBERG, VD CHOI, WC FAZELY, A IMLAY, RL METCALF, WJ DURKIN, LS HARPER, RW LING, TY MITCHELL, JW ROMANOWSKI, TA SMITH, ES TIMKO, M TI LIMITS ON NEUTRINO OSCILLATIONS FROM (NU)OVER-BAR(E) APPEARANCE SO PHYSICAL REVIEW D LA English DT Article ID LOW-ENERGY; CROSS-SECTION; NU-MU; SEARCH; DETECTOR; REACTOR; MASS; BEAM; NU-BAR-MU->NU-BAR-E; NU-MU->NU-E AB A 20-ton neutrino detector located near the Los Alamos Meson Physics Facility beam stop is used to search for v(e)BAR generated via neutrino oscillations from any of the three neutrino types, v(mu), v(mu)BAR, and v(e), which radiate from the beam stop. The analysis of three years of data provides limits on the oscillation modes v(mu)BAR --> v(e)BAR, v(e) --> v(e)BAR, and v(mu) --> v(e)BAR, and the lepton-number-violating decay process mu+ --> e+ + v(e)BAR + v(mu). The 90%-confidence-level limits for v(mu)BAR --> v(e)BAR oscillations are deltam2 less-than-or-equal-to 0.14 eV2 for maximal mixing, and sin(2)2theta less-than-or-equal-to 0.024 for large deltam2. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. CALTECH,PASADENA,CA 91125. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. LOUISIANA STATE UNIV,BATON ROUGE,LA 70803. OHIO STATE UNIV,COLUMBUS,OH 43210. NR 66 TC 25 Z9 25 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 FEB 1 PY 1993 VL 47 IS 3 BP 811 EP 829 DI 10.1103/PhysRevD.47.811 PG 19 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KK819 UT WOS:A1993KK81900011 ER PT J AU RIZZO, TG AF RIZZO, TG TI PRODUCTION OF Z' ASSOCIATED WITH PHOTONS OR JETS AS A PROBE OF NEW GAUGE-BOSON COUPLINGS SO PHYSICAL REVIEW D LA English DT Article ID LEFT-RIGHT MODEL; PARTON DISTRIBUTIONS; FERMION PRODUCTION; COLLIDERS; DECAY; PAIRS; MASS AB We examine the production of a new Z' gauge boson in association with photons or jets at future hadron supercolliders as a probe of its couplings to fermions. Associated jet production is found to be rather insensitive to these couplings and suffers from large uncertainties as well as substantial backgrounds. On the other hand, the ratio of rates for associated photon Z' production to that of conventional Z' production has a rather clean signature (once appropriate cuts are made), and is found to be quite sensitive to the choice of extended electroweak model, while being simultaneously insensitive to structure-function uncertainties and QCD corrections. Rates at both the Superconducting Super Collider (SSC) and the CERN Large Hadron Collider (LHC) are significant for Z' masses in the 1-TeV range. RP RIZZO, TG (reprint author), ARGONNE NATL LAB,DIV HIGH ENERGY PHYS,ARGONNE,IL 60439, USA. NR 50 TC 9 Z9 9 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD FEB 1 PY 1993 VL 47 IS 3 BP 956 EP 960 DI 10.1103/PhysRevD.47.956 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KK819 UT WOS:A1993KK81900024 ER PT J AU BERNARD, CW ELKHADRA, AX SONI, A AF BERNARD, CW ELKHADRA, AX SONI, A TI LATTICE CALCULATION OF THE SEMILEPTONIC FORM-FACTOR AT THE END-POINT FOR D-]K-ASTERISK SO PHYSICAL REVIEW D LA English DT Article ID DECAYS; MESONS AB The axial form factor at q2=q2max (end point) for D --> K* is reported: A1(q2max)=1.23+/-0.16+/-0.31. Our lattice study of A1(q2max) as a function of quark masses suggests an approximate onset of heavy-quark symmetry even for fairly light quark masses. C1 FERMILAB NATL ACCELERATOR LAB,THEORY GRP,BATAVIA,IL 60510. BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP BERNARD, CW (reprint author), WASHINGTON UNIV,DEPT PHYS,ST LOUIS,MO 63130, USA. NR 19 TC 9 Z9 9 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD FEB 1 PY 1993 VL 47 IS 3 BP 998 EP 1000 DI 10.1103/PhysRevD.47.998 PG 3 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KK819 UT WOS:A1993KK81900029 ER PT J AU SUZUKI, M AF SUZUKI, M TI TENSOR-MESON DOMINANCE - PHENOMENOLOGY OF THE F(2)-MESON SO PHYSICAL REVIEW D LA English DT Article ID QCD; ANOMALIES; SKYRME AB The f2 meson interaction is studied with the tensor-meson-dominance hypothesis of the energy-momentum tensor. A single parameter that determines the f2 meson interactions is fixed by the decay f2 --> pipi. Then the hypothesis not only gives the right final photon helicities in the decay f2 --> gammagamma, but also reproduces its decay rate correctly. Further tests are suggested in other decay modes and two-photon production of the f2 meson. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP SUZUKI, M (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 27 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 FEB 1 PY 1993 VL 47 IS 3 BP 1043 EP 1047 DI 10.1103/PhysRevD.47.1043 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KK819 UT WOS:A1993KK81900035 ER PT J AU BARNETT, RM CRUZ, R GUNION, JF HUBBARD, B AF BARNETT, RM CRUZ, R GUNION, JF HUBBARD, B TI CHARGED HIGGS BOSONS AT THE SUPERCONDUCTING SUPER COLLIDER SO PHYSICAL REVIEW D LA English DT Article AB We study techniques for discovering at the Superconducting Super Collider (SSC) a charged Higgs boson of a two-doublet Higgs sector in the decay t --> H+b, for a variety of top-quark and charged-Higgs-boson masses. ttBAR events are selected by demanding a high-p(T) lepton and a tagged b jet. One technique is to search for an excess of tau leptons from H+ decays. For tanbeta=v2/v1 greater than or similar to 0.5, this technique is usually viable, even for a fraction of the expected SSC yearly luminosity (depending upon m(t) and m(H+)). Techniques for approximately determining the H+ mass in this mode are discussed. We also demonstrate that for 0.1 less than or similar to tanbeta less than or similar to 1.5 a peak in the two-jet mass distribution resulting from H+ --> csBAR can be found, and a precise H+ mass determination is possible even in a fraction of an SSC year, provided B(t --> H+b) is not too small. C1 UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616. UNIV CALIF SANTA CRUZ,SANTA CRUZ INST PARTICLE PHYS,SANTA CRUZ,CA 95064. RP BARNETT, RM (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. 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 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD FEB 1 PY 1993 VL 47 IS 3 BP 1048 EP 1061 DI 10.1103/PhysRevD.47.1048 PG 14 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KK819 UT WOS:A1993KK81900036 ER PT J AU LEBED, RF AF LEBED, RF TI MESON MASS SPLITTINGS IN THE NONRELATIVISTIC MODEL SO PHYSICAL REVIEW D LA English DT Article ID GAUGE-THEORY; B-QUARK; HADRONS AB Mass splittings between isodoublet meson pairs and between 0- and 1- mesons of the same valence quark content are computed in a detailed nonrelativistic model. The field-theoretic expressions for such splittings are shown to reduce to kinematic and Breit-Fermi terms in the nonrelativistic limit. Algebraic results thus obtained are applied to the specific case of the linear-plus-Coulomb potential, with resultant numbers compared to experiment. C1 LAWRENCE BERKELEY LAB,DIV PHYS,THEORET PHYS GRP,BERKELEY,CA 94720. RP LEBED, RF (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 13 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 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD FEB 1 PY 1993 VL 47 IS 3 BP 1134 EP 1144 DI 10.1103/PhysRevD.47.1134 PG 11 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KK819 UT WOS:A1993KK81900044 ER PT J AU SUZUKI, M AF SUZUKI, M TI STRANGE AXIAL-VECTOR MESONS SO PHYSICAL REVIEW D LA English DT Note AB The strange axial-vector mesons K1 (1270) and K1 (1400) are reanalyzed in the light of the updated experimental information and compared with the recent result on the Kpipi production in tau decay. The mixing angle between the strange mesons of P-3(1) and P-1(1) is determined by the partial decay rates, and, independently, by the masses. They lead to theta(K) almost-equal-to 33-degrees or 57-degrees. The observed K1 (1400) production dominance in the tau decay favors theta(K) almost-equal-to 33-degrees. Flavor-SU(3) breaking of 20% or so in the production amplitudes can explain quantitatively the observed production ratio. C1 LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. RP UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA. NR 10 TC 108 Z9 108 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD FEB 1 PY 1993 VL 47 IS 3 BP 1252 EP 1255 DI 10.1103/PhysRevD.47.1252 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KK819 UT WOS:A1993KK81900059 ER PT J AU GRONAU, M WAKAIZUMI, S AF GRONAU, M WAKAIZUMI, S TI TESTING V - A IN LAMBDA(B) DECAYS SO PHYSICAL REVIEW D LA English DT Note AB We comment on a recent suggestion by Amundson, Rosner, Worah, and Wise to test the chirality of the b-quark decay coupling via polarized LAMBDA(b) baryons produced in e+e- --> Z --> LAMBDA(b) + X. We study the effect of contributions from an amplitude in which a right-handed b-to-c current couples to a V - A lepton current. C1 CERN,DIV THEORY,CH-1211 GENEVA 23,SWITZERLAND. UNIV TOKUSHIMA,SCH MED,DEPT PHYS,TOKUSHIMA,JAPAN. RP GRONAU, M (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305, USA. NR 13 TC 19 Z9 19 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 FEB 1 PY 1993 VL 47 IS 3 BP 1262 EP 1263 DI 10.1103/PhysRevD.47.1262 PG 2 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KK819 UT WOS:A1993KK81900062 ER PT J AU DAWSON, S KAUFFMAN, RP AF DAWSON, S KAUFFMAN, RP TI QCD CORRECTIONS TO THE HIGGS-BOSON DECAY H-]GAMMA-GAMMA SO PHYSICAL REVIEW D LA English DT Note ID MASS; PHOTONS AB We compute the two-loop QCD corrections to the decay H --> gammagamma in the heavy-top-quark limit. We present the subleading terms of O(alpha(s)M(H)2/M(t)2) and discuss their importance in extensions of the standard model of electroweak symmetry breaking. C1 UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616. RP DAWSON, S (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 11 TC 66 Z9 66 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 FEB 1 PY 1993 VL 47 IS 3 BP 1264 EP 1267 DI 10.1103/PhysRevD.47.1264 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KK819 UT WOS:A1993KK81900063 ER PT J AU AUSTERN, MH AF AUSTERN, MH TI CAN A STRONGLY INTERACTING HIGGS BOSON RESCUE SU(5) SO PHYSICAL REVIEW D LA English DT Note ID SCALAR AB Renormalization-group analyses show that the three running gauge coupling constants of the standard model do not become equal at any energy scale. These analyses have not included any effects of the Higgs boson's self-interaction. In this paper, I examine whether these effects can modify this conclusion, and show that they are too small to affect the failure of coupling constant unification. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. RP AUSTERN, MH (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 10 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 FEB 1 PY 1993 VL 47 IS 3 BP 1268 EP 1271 DI 10.1103/PhysRevD.47.1268 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KK819 UT WOS:A1993KK81900064 ER PT J AU EICHTEN, EJ HINCHLIFFE, I QUIGG, C AF EICHTEN, EJ HINCHLIFFE, I QUIGG, C TI FLAVOR ASYMMETRY OF THE NUCLEON SEA - CONSEQUENCES FOR DILEPTON PRODUCTION SO PHYSICAL REVIEW D LA English DT Note ID BREAKING; SUM AB Parton distributions derived from a chiral quark model that generates an excess of down quarks and antiquarks in the proton's sea satisfactorily describe the measured yields of muon pairs produced in proton-nucleus collisions. Comparison of dilepton yields from hydrogen and deuterium targets promises greater sensitivity to the predicted flavor asymmetry. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP EICHTEN, EJ (reprint author), FERMILAB NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. NR 14 TC 16 Z9 16 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 FEB 1 PY 1993 VL 47 IS 3 BP R747 EP R750 DI 10.1103/PhysRevD.47.R747 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KK819 UT WOS:A1993KK81900001 ER PT J AU EVANS, JW RAY, TR AF EVANS, JW RAY, TR TI KINETICS OF THE MONOMER-MONOMER SURFACE-REACTION MODEL SO PHYSICAL REVIEW E LA English DT Article ID HETEROGENEOUS CATALYSIS; PHASE-TRANSITIONS; BEHAVIOR; LATTICE; SYSTEMS AB The two-dimensional monomer-monomer (AB) surface reaction model without diffusion is considered for infinitesimal, finite, and infinite reaction rates k. For equal reactant adsorption rates, in all cases, simulations reveal the same form of slow poisoning, associated with clustering of reactants. This behavior is also the same as that found in simulations of the two-dimensional voter model studied in interacting-particle systems theory. The voter model r-an also be obtained from the dimer-dimer or monomer-dimer surface reaction models with infinitesimal reaction rate. We provide a detailed elucidation of the slow poisoning kinetics via an analytic treatment for the k = 0+ AB reaction and the voter models. This analysis is extended to incorporate the effects of place-exchange diffusion which slows, but does not prevent poisoning. We also show that the k = 0+ AB reaction with no diffusion is equivalent to the voter model with diffusion at rate 1/2. Identical behavior of the monomer-monomer reaction and the voter model is also found in an ''epidemic'' analysis, where one considers the evolution of a surface poisoned by one species, except for a small patch. Finally, we apply our findings to elucidate the behavior of the monomer-dimer surface reaction model for small reaction rates. C1 IOWA STATE UNIV SCI & TECHNOL, DEPT MATH, AMES, IA 50011 USA. RP IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. NR 29 TC 41 Z9 41 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0045 EI 2470-0053 J9 PHYS REV E JI Phys. Rev. E PD FEB PY 1993 VL 47 IS 2 BP 1018 EP 1025 DI 10.1103/PhysRevE.47.1018 PG 8 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA KY136 UT WOS:A1993KY13600035 ER PT J AU EDISON, N YOUNG, PE HOLMES, N LEE, RW WOOLSEY, NC WARK, JS BLYTH, WJ AF EDISON, N YOUNG, PE HOLMES, N LEE, RW WOOLSEY, NC WARK, JS BLYTH, WJ TI CHARACTERIZATION OF A CAPILLARY-DISCHARGE PLASMA SO PHYSICAL REVIEW E LA English DT Article ID BRILLOUIN-SCATTERING; LASER; TEMPERATURE AB The electron density and temperature of the plasma produced by a capillary discharge with open geometry have been characterized. Peak densities of 1 x 10(19) cm-3 and electron temperatures of 2.5 eV are observed. The plasma is uniform over distances on the order of 1 cm. The time evolution of both the electron density and temperature profiles has been studied over the duration of the 5-mus-long discharge. C1 UNIV OXFORD,DEPT PHYS,CLARENDON LAB,OXFORD OX1 3PU,ENGLAND. RP EDISON, N (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 21 TC 8 Z9 9 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD FEB PY 1993 VL 47 IS 2 BP 1305 EP 1312 DI 10.1103/PhysRevE.47.1305 PG 8 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA KY136 UT WOS:A1993KY13600068 ER PT J AU VALEO, EJ COWLEY, SC AF VALEO, EJ COWLEY, SC TI MICROSPHERE-BASED SHORT-WAVELENGTH RECOMBINATION X-RAY LASER SO PHYSICAL REVIEW E LA English DT Article ID PLASMA; MODELS AB We describe a scheme for obtaining very short wavelengths (lambda is similar to 10 angstrom) in recombination lasers. The rapid cooling rates necessary to achieve population inversion during recombination are attained by adiabatic expansion of submicrometer spheres. The lasing region is made up of many such spheres. The spheres are heated impulsively by a powerful picosecond laser. First, they ionize, then as they expand, they cool and recombine. We have calculated the optimum sphere size and initial temperature for maximum gain in the n = 3 to 2 transition of hydrogenlike ions of elements with atomic numbers, Z, between 10 and 30. Gain of about 250 cm-1 is calculated in aluminum at 38.8 angstrom. Gain rapidly decreases with Z so that gain in titanium at 13.6 angstrom is about 10 cm-1. We have calculated the required pump-laser intensity and found it to be attainable with current lasers. The propagation of the pump through the ''gas'' of spheres is considered and the problems arising from pump scattering by the spheres are RP VALEO, EJ (reprint author), PRINCETON PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 28 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 1063-651X J9 PHYS REV E JI Phys. Rev. E PD FEB PY 1993 VL 47 IS 2 BP 1321 EP 1336 DI 10.1103/PhysRevE.47.1321 PG 16 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA KY136 UT WOS:A1993KY13600070 ER PT J AU SCHARF, R BISHOP, AR AF SCHARF, R BISHOP, AR TI LENGTH-SCALE COMPETITION FOR THE ONE-DIMENSIONAL NONLINEAR SCHRODINGER-EQUATION WITH SPATIALLY PERIODIC POTENTIALS SO PHYSICAL REVIEW E LA English DT Article ID SOLITONS; SYSTEMS; PERTURBATION; MEDIA AB The effect of spatially periodic on-site potentials on solitons of the (1 + 1)-dimensional nonlinear Schrodinger equation depends not only on the amplitude of the perturbation but also on two length ratios-between the wavelength of the potential and either the spatial width of the soliton or its phase-modulation wavelength. For solitons which are slowly moving or at rest, only the first ratio is important: Solitons which are narrow compared to the wavelength of the potential move like particles in an effective potential; wide solitons move like ''renormalized'' particles; and for competing length scales, solitons are easily destabilized by the perturbation and break up into smaller localized excitations and radiation. For initially rapidly moving solitions in short-wavelength potentials, a different resonance effect is described which can inhibit soliton propagation. Away from this resonance the solitons can move in a ''dressed'' form radiating very slowly. Furthermore, it is shown numerically that two such ''dressed'' solitons reemerge after collision, essentially unchanged. We also comment on the structural stability of completely integrable dynamics under spatially periodic perturbations. Finally, we remark on the relevance of our results for the dynamical behavior of large polarons and bipolarons in disordered ionic lattices. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. NR 18 TC 80 Z9 81 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD FEB PY 1993 VL 47 IS 2 BP 1375 EP 1383 DI 10.1103/PhysRevE.47.1375 PG 9 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA KY136 UT WOS:A1993KY13600073 ER PT J AU BRIZARD, AJ COOK, DR KAUFMAN, AN AF BRIZARD, AJ COOK, DR KAUFMAN, AN TI WAVE-ACTION CONSERVATION FOR PSEUDO-HERMITIAN FIELDS SO PHYSICAL REVIEW LETTERS LA English DT Article ID ENERGY; MAGNETOHYDRODYNAMICS; EQUILIBRIA; EQUATIONS; POISSON; FLUIDS AB The linearized Vlasov-Maxwell system and ideal magnetohydrodynamics are examples of systems with a pseudo-Hermitian structure with respect to an indefinite inner product on the space of complex representations of real fields [J. Larsson, Phys. Rev. Lett. 66, 1466 (1991)]. This structure leads to variational principles, whose variation with respect to local wave phase yields new wave-action conservation laws, which generalize previous eikonal versions. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. RP BRIZARD, AJ (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. OI Brizard, Alain/0000-0002-0192-6273 NR 28 TC 12 Z9 12 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 1 PY 1993 VL 70 IS 5 BP 521 EP 524 DI 10.1103/PhysRevLett.70.521 PG 4 WC Physics, Multidisciplinary SC Physics GA KK248 UT WOS:A1993KK24800001 ER PT J AU LUTY, MA SUNDRUM, R AF LUTY, MA SUNDRUM, R TI TECHNICOLOR THEORIES WITH NEGATIVE VALUES OF THE PESKIN-TAKEUCHI ELECTROWEAK PARAMETER-S SO PHYSICAL REVIEW LETTERS LA English DT Article ID RADIATIVE-CORRECTIONS; BOSON AB We show that the pseudo Nambu-Goldstone boson contribution to the Peskin-Takeuchi electroweak parameter S can be negative in a class of technicolor theories. This negative contribution can be large enough to cancel the positive technihadron contribution, showing that electroweak precision tests alone cannot be used to rule out technicolor as the mechanism of electroweak symmetry breaking. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. RP LUTY, MA (reprint author), LAWRENCE BERKELEY LAB,THEORET PHYS GRP,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 29 TC 30 Z9 30 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 1 PY 1993 VL 70 IS 5 BP 529 EP 532 DI 10.1103/PhysRevLett.70.529 PG 4 WC Physics, Multidisciplinary SC Physics GA KK248 UT WOS:A1993KK24800003 ER PT J AU MOLITORIS, JD MEYERHOF, WE STOLLER, C ANHOLT, R SPOONER, DW MORETTO, LG SOBOTKA, LG MCDONALD, RJ WOZNIAK, GJ MCMAHAN, MA BLUMENFELD, L COLONNA, N NESSI, M MORENZONI, E AF MOLITORIS, JD MEYERHOF, WE STOLLER, C ANHOLT, R SPOONER, DW MORETTO, LG SOBOTKA, LG MCDONALD, RJ WOZNIAK, GJ MCMAHAN, MA BLUMENFELD, L COLONNA, N NESSI, M MORENZONI, E TI MOLECULAR-ORBITAL STUDY OF LATE-FISSION TIMES IN DEEP-INELASTIC U-238+U-238 COLLISIONS SO PHYSICAL REVIEW LETTERS LA English DT Article ID SMALL IMPACT PARAMETERS; K-SHELL IONIZATION; U+U; NUCLEI AB The U-like K-vacancy production probability in 7.5-MeV/nucleon deep-inelastic U-238 + U-238 collisions has been measured for no-fission, single-fission, and double-fission exit channels. The results are interpreted using quasimolecular orbital correlations for diatomic and triatomic configurations. This leads to the determination of lower limits for the time scale for late fission of U-like products (greater-than-or-equal-to 8 and greater-than-or-equal-to 4 as) and their probability (greater-than-or-equal-to 77% and greater-than-or-equal-to 52%), at mean initial-excitation energies of approximately 40 and approximately 105 MeV, respectively. C1 STANFORD UNIV,DEPT PHYS,STANFORD,CA 94305. LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. SWISS FED INST TECHNOL,KERNPHYS LAB,CH-8093 ZURICH,SWITZERLAND. OI Morenzoni, Elvezio/0000-0002-9663-4213 NR 25 TC 35 Z9 35 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 1 PY 1993 VL 70 IS 5 BP 537 EP 540 DI 10.1103/PhysRevLett.70.537 PG 4 WC Physics, Multidisciplinary SC Physics GA KK248 UT WOS:A1993KK24800005 ER PT J AU ROSENAU, P HYMAN, JM AF ROSENAU, P HYMAN, JM TI COMPACTONS - SOLITONS WITH FINITE WAVELENGTH SO PHYSICAL REVIEW LETTERS LA English DT Article AB To understand the role of nonlinear dispersion in pattern formation, we introduce and study Korteweg-de Vries-like equations with nonlinear dispersion; u(t) + (u(m))x + (u(n))xxx = 0, m,n > 1. The solitary wave solutions of these equations have remarkable properties: They collide elastically, but unlike the Korteweg-de Vries (m = 2, n = 1) solitons, they have compact support. When two ''compactons'' collide, the-interaction site is marked by the birth of low-amplitude compacton-anticompacton pairs. These equations seem to have only a finite number of local conservation laws. Nevertheless, the behavior and the stability of these compactons is very similar to that observed in completely integrable systems. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP ROSENAU, P (reprint author), TECHNION ISRAEL INST TECHNOL,DEPT MECH ENGN,IL-32000 HAIFA,ISRAEL. NR 5 TC 691 Z9 712 U1 0 U2 14 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 FEB 1 PY 1993 VL 70 IS 5 BP 564 EP 567 DI 10.1103/PhysRevLett.70.564 PG 4 WC Physics, Multidisciplinary SC Physics GA KK248 UT WOS:A1993KK24800012 ER PT J AU JACOBS, JW KLEIN, DL JENKINS, DG BENJAMIN, RF AF JACOBS, JW KLEIN, DL JENKINS, DG BENJAMIN, RF TI INSTABILITY GROWTH-PATTERNS OF A SHOCK-ACCELERATED THIN FLUID LAYER SO PHYSICAL REVIEW LETTERS LA English DT Article AB Laser-induced fluorescence imaging of a shock-accelerated thin gas layer, produced by a planar SF6 jet in air, shows multiple flow evolutions. Richtmyer-Meshkov instability causes spatially periodic perturbations initially imposed on the jet to develop into one of three distinct flow patterns, indicating nonlinear instability growth. Slight differences in the vorticity distribution deposited on the air-SF6 interfaces by the shock interaction produce a bifurcated flow, observed as mushroom-shaped or sinuous-shaped interfacial patterns. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP JACOBS, JW (reprint author), UNIV ARIZONA,DEPT AEROSP & MECH ENGN,TUCSON,AZ 85721, USA. RI Jacobs, Jeffrey/B-1339-2013 OI Jacobs, Jeffrey/0000-0003-0193-7105 NR 7 TC 42 Z9 43 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 FEB 1 PY 1993 VL 70 IS 5 BP 583 EP 586 DI 10.1103/PhysRevLett.70.583 PG 4 WC Physics, Multidisciplinary SC Physics GA KK248 UT WOS:A1993KK24800017 ER PT J AU ELLISON, M BALL, M BRABSON, B BUDNICK, J CAUSSYN, DD CHAO, AW COLLINS, J CURTIS, SA DERENCHUK, V DUTT, S EAST, G ELLISON, T FRIESEL, D GABELLA, W HAMILTON, B HUANG, H JONES, WP LAMBLE, W LEE, SY LI, D MINTY, MG NAGAITSEV, S NG, KY PEI, X RONDEAU, G SLOAN, T SYPHERS, M TEPIKIAN, S YAN, Y ZHANG, PL AF ELLISON, M BALL, M BRABSON, B BUDNICK, J CAUSSYN, DD CHAO, AW COLLINS, J CURTIS, SA DERENCHUK, V DUTT, S EAST, G ELLISON, T FRIESEL, D GABELLA, W HAMILTON, B HUANG, H JONES, WP LAMBLE, W LEE, SY LI, D MINTY, MG NAGAITSEV, S NG, KY PEI, X RONDEAU, G SLOAN, T SYPHERS, M TEPIKIAN, S YAN, Y ZHANG, PL TI DRIVEN RESPONSE OF THE SYNCHROTRON MOTION OF A BEAM SO PHYSICAL REVIEW LETTERS LA English DT Article AB The synchrotron motion of a beam was tracked for the first time by digitizing the phase of the beam signal from a high bandwidth wall gap monitor relative to the rf phase and the momentum deviation with a transverse beam position measurement in a high dispersion region. The measured synchrotron tune as a function of the synchrotron amplitude agrees well with theory. When the rf stable phase angle was modulated harmonically, the response of the synchrotron motion showed characteristics of chaos and bifurcations of a parametric resonant system. Manipulating the rf system to create islands in the synchrotron phase space may offer applications in future hadron colliders. C1 SUPERCONDUCTING SUPER COLLIDER LAB,DALLAS,TX 75237. STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. BROOKHAVEN NATL LAB,UPTON,NY 11973. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. RP ELLISON, M (reprint author), INDIANA UNIV,CYCLOTRON FACIL,BLOOMINGTON,IN 47405, USA. OI Curtis, Scott/0000-0002-5510-4566 NR 12 TC 35 Z9 35 U1 1 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 FEB 1 PY 1993 VL 70 IS 5 BP 591 EP 594 DI 10.1103/PhysRevLett.70.591 PG 4 WC Physics, Multidisciplinary SC Physics GA KK248 UT WOS:A1993KK24800019 ER PT J AU THEVUTHASAN, S YNZUNZA, RX TOBER, ED FADLEY, CS KADUWELA, AP VANHOVE, MA AF THEVUTHASAN, S YNZUNZA, RX TOBER, ED FADLEY, CS KADUWELA, AP VANHOVE, MA TI HIGH-ENERGY PHOTOELECTRON HOLOGRAPHY FOR AN ADSORBATE TEST SYSTEM - C(2X2)S ON NI(001) SO PHYSICAL REVIEW LETTERS LA English DT Article ID ELECTRON-EMISSION HOLOGRAPHY; ATOMIC-RESOLUTION; PHOTOEMISSION; SCATTERING; EXTENSION; ACCURACY AB We have measured and calculated the intensity profiles for S 2p photoemission at 1327 eV from the well-defined adsorbate system, c(2 x 2)S on Ni(001), and have analyzed these via several holographic imaging procedures. Images of nearest-neighbor S atoms are clearly seen in both experiment and theory, and their positions are improved if effects due to twin images are suppressed by analyzing only a half hologram. Image positions are further improved to within +/-0.2-0.3 angstrom with corrections for scattered-wave amplitudes and phase shifts. C1 LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. RP UNIV CALIF DAVIS, DEPT PHYS, DAVIS, CA 95616 USA. RI Van Hove, Michel/A-9862-2008 OI Van Hove, Michel/0000-0002-8898-6921 NR 17 TC 47 Z9 47 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 1 PY 1993 VL 70 IS 5 BP 595 EP 598 DI 10.1103/PhysRevLett.70.595 PG 4 WC Physics, Multidisciplinary SC Physics GA KK248 UT WOS:A1993KK24800020 ER PT J AU TERMINELLO, LJ BARTON, JJ LAPIANOSMITH, DA AF TERMINELLO, LJ BARTON, JJ LAPIANOSMITH, DA TI HOLOGRAPHIC IMAGING OF ATOMS USING MULTIPLE-WAVE-NUMBER ELECTRON ANGULAR-DISTRIBUTION PATTERNS SO PHYSICAL REVIEW LETTERS LA English DT Article ID EXTENDED-FINE-STRUCTURE; DIFFRACTION PATTERNS; PHOTOEMISSION; SCATTERING; PHOTOELECTRON; GEOMETRY AB We have imaged Cu atoms near a (100) single-crystal face using photoelectron holography and have applied for the first time a multiple-wave-number method for improving the quality of images obtained from experimental results. When compared to images obtained from single-energy holograms, the structural information extracted from the multiple-wave-number, phased-sum method gives substantial resolution improvement, twin-image suppression, and artifact reduction. C1 IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598. RP TERMINELLO, LJ (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 22 TC 88 Z9 88 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 FEB 1 PY 1993 VL 70 IS 5 BP 599 EP 602 DI 10.1103/PhysRevLett.70.599 PG 4 WC Physics, Multidisciplinary SC Physics GA KK248 UT WOS:A1993KK24800021 ER PT J AU CHEN, Y TONG, SY BOHNEN, KP RODACH, T HO, KM AF CHEN, Y TONG, SY BOHNEN, KP RODACH, T HO, KM TI 1ST-PRINCIPLES PHONON AND MULTIPLE-SCATTERING ELECTRON-ENERGY-LOSS-SPECTRA STUDIES OF CU(111) AND AG(111) SO PHYSICAL REVIEW LETTERS LA English DT Article ID HE-SURFACE SCATTERING; NOBLE-METALS; DISPERSION; AG(001) AB Parameter-free first-principles phonon calculations are used in conjunction with multiple-scattering electron-energy-loss calculations to reveal new localized modes on Cu(111) and Ag(111). The discovery of these z-polarized localized modes along GAMMAMBAR and GAMMAKBAR provides for the first time good agreement between theory and all the existing helium-atom-scattering and electron-energy-loss experimental results. The new results indicate that it is not necessary to evoke exotic models such as anomalous surface dynamical effects on these densely packed surfaces. C1 UNIV WISCONSIN,DEPT PHYS,MILWAUKEE,WI 53201. KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH,INST NUKL FESTKORPERPHYS,W-7500 KARLSRUHE 1,GERMANY. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. RP CHEN, Y (reprint author), UNIV WISCONSIN,SURFACE STUDIES LAB,MILWAUKEE,WI 53201, USA. NR 21 TC 45 Z9 45 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 FEB 1 PY 1993 VL 70 IS 5 BP 603 EP 606 DI 10.1103/PhysRevLett.70.603 PG 4 WC Physics, Multidisciplinary SC Physics GA KK248 UT WOS:A1993KK24800022 ER PT J AU WANG, CZ HO, KM CHAN, CT AF WANG, CZ HO, KM CHAN, CT TI TIGHT-BINDING MOLECULAR-DYNAMICS STUDY OF AMORPHOUS-CARBON SO PHYSICAL REVIEW LETTERS LA English DT Article AB The structural and electronic properties of amorphous carbon are studied with tight-binding molecular-dynamics simulations. An amorphous carbon structure with 216 atoms obtained from our simulation gives a structure factor S(Q) in very good agreement with the results of neutron scattering from a sputtered a-C sample. We found that the amorphous structure consists of graphitelike fragments embedded in a matrix of both twofold and fourfold coordinated atoms. We also found a small pseudo-gap in the electronic density of states at the Fermi level. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,MICROELECTR RES CTR,AMES,IA 50011. RP WANG, CZ (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011, USA. NR 23 TC 113 Z9 114 U1 1 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 FEB 1 PY 1993 VL 70 IS 5 BP 611 EP 614 DI 10.1103/PhysRevLett.70.611 PG 4 WC Physics, Multidisciplinary SC Physics GA KK248 UT WOS:A1993KK24800024 ER PT J AU WOLF, D AF WOLF, D TI SHOULD ALL SURFACES BE RECONSTRUCTED SO PHYSICAL REVIEW LETTERS LA English DT Article ID STRESS TENSOR; 110 SURFACES; ENERGY; METALS; TENSION; STRAIN AB The driving force for surface reconstruction is shown to be given by the (usually nonzero) difference between the surface energy and stress, leading to a ground state characterized by an isotropic stress tensor with vanishing shear components. The analytic results, illustrated by atomistic simulations of the missing-row reconstruction of the Au(110) surface, permit likely reconstructions to be identified based on the stress and energy in the unreconstructed surface. RP ARGONNE NATL LAB, DIV MAT SCI, ARGONNE, IL 60439 USA. NR 17 TC 48 Z9 48 U1 1 U2 6 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 1 PY 1993 VL 70 IS 5 BP 627 EP 630 DI 10.1103/PhysRevLett.70.627 PG 4 WC Physics, Multidisciplinary SC Physics GA KK248 UT WOS:A1993KK24800028 ER PT J AU DONG, M MARCHETTI, MC MIDDLETON, AA VINOKUR, V AF DONG, M MARCHETTI, MC MIDDLETON, AA VINOKUR, V TI ELASTIC STRING IN A RANDOM POTENTIAL SO PHYSICAL REVIEW LETTERS LA English DT Article ID CHARGE-DENSITY WAVES; HIGH-TC SUPERCONDUCTORS; THERMAL FLUCTUATIONS; VORTEX LINES; MODEL; INTERFACES; DYNAMICS; CREEP; NOISE; MEDIA AB We have studied numerically the dynamics of a directed elastic string in a two-dimensional array of quenched random impurities. The string is driven by a constant transverse force and thermal fluctuations are neglected. There is a transition from pinned to unpinned behavior at a critical value F(T) of the driving force. At the transition the average string velocity scales with the driving force. The scaling is equally well described by a power law v(d) approximately (F - F(T))zeta, with zeta = 0.24 +/- 0.1, or by a logarithm, v(d) approximately 1/ln(F - F(T)). The divergence of the velocity-velocity correlation length at threshold is characterized by an exponent nu = 1.05 +/- 0.1. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP DONG, M (reprint author), SYRACUSE UNIV,DEPT PHYS,SYRACUSE,NY 13244, USA. OI Middleton, Arthur Alan/0000-0003-1283-7214 NR 15 TC 68 Z9 68 U1 2 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 1 PY 1993 VL 70 IS 5 BP 662 EP 665 DI 10.1103/PhysRevLett.70.662 PG 4 WC Physics, Multidisciplinary SC Physics GA KK248 UT WOS:A1993KK24800037 ER PT J AU CARRA, P THOLE, BT ALTARELLI, M WANG, XD AF CARRA, P THOLE, BT ALTARELLI, M WANG, XD TI X-RAY CIRCULAR-DICHROISM AND LOCAL MAGNETIC-FIELDS SO PHYSICAL REVIEW LETTERS LA English DT Article AB Sum rules are derived for the circular dichroic response of a core line (CMXD). They relate the intensity of the CMXD signal to the ground-state expectation value of the magnetic field operators (orbital, spin, and magnetic dipole) of the valence electrons. The results obtained are discussed and tested for transition metals and rare earths. C1 UNIV GRONINGEN,CTR MAT SCI,DEPT CHEM PHYS,9747 AG GRONINGEN,NETHERLANDS. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. RP CARRA, P (reprint author), EUROPEAN SYNCHROTRON RADIAT FACIL,BP 220,F-38043 GRENOBLE,FRANCE. NR 11 TC 1524 Z9 1529 U1 13 U2 105 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 FEB 1 PY 1993 VL 70 IS 5 BP 694 EP 697 DI 10.1103/PhysRevLett.70.694 PG 4 WC Physics, Multidisciplinary SC Physics GA KK248 UT WOS:A1993KK24800045 ER PT J AU LADD, AJC AF LADD, AJC TI DYNAMIC SIMULATIONS OF SEDIMENTING SPHERES SO PHYSICS OF FLUIDS A-FLUID DYNAMICS LA English DT Article ID DILUTE POLYDISPERSE SYSTEM; REYNOLDS-NUMBER FLOW; HYDRODYNAMIC INTERACTIONS; MOBILITY FUNCTIONS; DISPERSION; SUSPENSION; PARTICLES; RESISTANCE; MOTION AB The sedimentation of monodisperse suspensions of rigid spheres has been studied by dynamical simulation; computational techniques are described and numerical results are reported. It has been found that there is a slow relaxation of the suspension microstructure during sedimentation, so that compared with the initial equilibrium distribution, there is an increased number of pairs of particles near contact; this leads to a 5%-10% increase in the average sedimentation velocity. Individual particle velocities fluctuate about the mean fall speed; these fluctuations are large and persist for long times. The resulting hydrodynamically induced dispersion of the particles can be characterized by strongly anisotropic diffusion coefficients; however, the dispersion process is non-Fickian at high solids concentrations. RP LADD, AJC (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 40 TC 103 Z9 103 U1 2 U2 14 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8213 J9 PHYS FLUIDS A-FLUID PD FEB PY 1993 VL 5 IS 2 BP 299 EP 310 DI 10.1063/1.858695 PG 12 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA KJ516 UT WOS:A1993KJ51600003 ER PT J AU GOTOH, T KRAICHNAN, RH AF GOTOH, T KRAICHNAN, RH TI STATISTICS OF DECAYING BURGERS TURBULENCE SO PHYSICS OF FLUIDS A-FLUID DYNAMICS LA English DT Article ID MAPPING CLOSURE; SCALAR AB Freely decaying Burgers turbulence at low and moderate Reynolds number R is studied by mapping closure and by numerical simulations. Good agreement is found for the single-point probability distribution function (pdf) of velocity gradient xi, for wave number spectra, and for various integral statistical quantities. The pdf of xi exhibits a nearly exponential tail at large negative xi, and a cusp with sharp cutoff at a positive value of xi. The pdf of fluid density has a power-law tail, so that high-order moments of density do not exist. Asymptotic analysis of the mapping closure as R --> infinity yields an inertial-range wave number spectrum of kinetic energy with the form E(k) is-proportional-to k-2. The pdf cusp becomes infinite as R --> infinity and gives rise to a flatness [xi4]/[xi2]2 is-proportional-to R in the limit. C1 LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. STANFORD UNIV,CTR TURBULENCE RES,STANFORD,CA 94305. RP GOTOH, T (reprint author), NAGOYA INST TECHNOL,DEPT SYST ENGN,NAGOYA,AICHI 466,JAPAN. NR 13 TC 62 Z9 62 U1 0 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8213 J9 PHYS FLUIDS A-FLUID PD FEB PY 1993 VL 5 IS 2 BP 445 EP 459 DI 10.1063/1.858868 PG 15 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA KJ516 UT WOS:A1993KJ51600017 ER PT J AU CHEN, SY DOOLEN, GD KRAICHNAN, RH SHE, ZS AF CHEN, SY DOOLEN, GD KRAICHNAN, RH SHE, ZS TI ON STATISTICAL CORRELATIONS BETWEEN VELOCITY INCREMENTS AND LOCALLY AVERAGED DISSIPATION IN HOMOGENEOUS TURBULENCE SO PHYSICS OF FLUIDS A-FLUID DYNAMICS LA English DT Article ID FULLY-DEVELOPED TURBULENCE; NON-GAUSSIAN STATISTICS; INTERMITTENCY; MODEL AB Kolmogorov postulated in 1962 [J. Fluid Mech. 13, 82 (1962)] that the magnitude of velocity increments deltau(r) across an inertial range distance r in high Reynolds number flows is typically (repsilon(r))1/3, where epsilon(r) is the locally averaged dissipation rate. This refined similarity hypothesis has been widely used in discussions of anomalous exponents of velocity structure functions in connection with the scaling exponents of epsilon(r), Recently Hosokawa and Yamamoto [Phys. Fluids A 4, 457 (1992)] have presented numerical evidence from turbulence simulations that deltau(r) is uncorrelated with epsilon(r) in moderate Reynolds number flows. In the present paper, results of similar measurements are offered for flow fields with a wide range of Reynolds numbers obtained from high-resolution numerical simulations of both forced and decaying isotropic turbulence. The present results show clear evidence of correlations between deltau(r) and epsilon(r), irrespective of the Reynolds number. Kolmogorov's hypothesis is verified for r somewhat larger than the viscous dissipation scale, but at much larger distances the correlation seems to be weaker. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. PRINCETON UNIV,PROGRAM APPL & COMP MATH,PRINCETON,NJ 08544. RP CHEN, SY (reprint author), LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545, USA. RI Chen, Shiyi/A-3234-2010; 佘, 振苏/C-1447-2010; She, Zhen-Su/H-9722-2014 NR 17 TC 153 Z9 153 U1 3 U2 12 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8213 J9 PHYS FLUIDS A-FLUID PD FEB PY 1993 VL 5 IS 2 BP 458 EP 463 DI 10.1063/1.858897 PG 6 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA KJ516 UT WOS:A1993KJ51600018 ER PT J AU ONO, M AF ONO, M TI ION BERNSTEIN WAVE HEATING RESEARCH SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Review ID CYCLOTRON FREQUENCY-RANGE; LOWER-HYBRID FREQUENCY; EXTERNAL KINK MODES; ALCATOR-C TOKAMAK; DENSITY-FLUCTUATIONS; RF STABILIZATION; PARAMETRIC DECAY; EDGE PLASMA; PONDEROMOTIVE FORCE; ELECTROSTATIC WAVE AB Ion Bernstein wave heating (IBWH) utilizes the ion Bernstein wave (IBW), a hot plasma wave, to carry the radio frequency (rf) power to heat the tokamak reactor core. Earlier wave accessibility studies have shown that this finite-Larmor-radius (FLR) mode should penetrate into a hot dense reactor plasma core without significant attenuation. Moreover, the IBW's low perpendicular phase velocity (omega/k(perpendicular-to) almost-equal-to V(Ti) much less than V(alpha)) greatly reduces the otherwise serious wave absorption by the 3.5 MeV fusion alpha particles. In addition, the property of IBW's that k(perpendicular-to) rho(i) almost-equal-to 1 makes localized bulk ion heating possible at the ion cyclotron harmonic layers. Such bulk ion heating can prove useful in optimizing fusion reactivity. In another vein, with proper selection of parameters, IBW's can be made subject to strong localized electron Landau damping near the major ion cyclotron harmonic resonance layers. This property can be useful, for example, for rf current drive in the reactor plasma core. IBW's can be excited with loop antennas or with a lower-hybrid-like waveguide launcher at the plasma edge, the latter structure being one that is especially compatible with reactor application. In either case, the mode at the plasma edge is an electron plasma wave (EPW). Deeper in the plasma, the EPW is mode transformed into an IBW. Such launching and mode transformation of IBW's were first demonstrated in experiments in the Advanced Concepts Torus-I (ACT-1) [Phys. Rev. Lett. 45, 1105 (1980)] plasma torus and in particle simulation calculations. These and other aspects of IBW heating physics have been investigated through a number of experiments performed on ACT-1, the Japanese Institute of Plasma Physics Tokamak II-Upgrade (JIPPTII-U) [Phys. Rev. Lett. 54, 2339 (1985)], the Tokyo University Non-Circular Tokamak (TNT) [Nucl. Fusion 26, 1097 (1986)], the Princeton Large Tokamak (PLT) [Phys. Rev. Lett. 60, 294 (1988)], and Alcator-C [Phys. Rev. Lett. 60, 298 (1988)]. In these experiments both linear and nonlinear heating processes have been observed. Interestingly, improvement of plasma confinement was also observed in the PLT and Alcator-C experiments, opening up the possible use of IBW's for the active control of plasma transport. Two theoretical explanations have been proposed: one based on four-wave mixing of IBW with low-frequency turbulence, the other on the nonlinear generation of a velocity-shear layer. Both models are consistent with the observed threshold power level of a few hundred kW in the experiments. Experiments on lower field plasmas on JFTII-M [Eighth Topical Conference on Radio-Frequency Power in Plasmas, Irvine, CA, 1989 (American Institute of Physics, New York, 1989), p. 350] and DIII-D [Eighth Topical Conference on Radio-Frequency Power in Plasmas, Irvine, CA, 1989 (American Institute of Physics, New York, 1989), p. 314] have raised some concern with the IBW wave-launching process. The experiments showed serious impurity release from the walls but little or no core heating, a combination of circumstances strongly suggestive of edge heating. Possible parasitic channels could include the excitation of short wavelength modes by the Faraday shield's fringing fields, antenna-sheath-wave excitation, an axial-convective loss channel, and nonlinear processes such as parametric instability and ponderomotive effects. Suggested remedies include changes in the antenna phasing, the use of low-Z insulators, operating at higher frequencies, positioning the plasma differently with respect to the antenna, eliminating the Faraday shields, and using a waveguide launcher. The recent JIPPTII-U experiment, employing a 0-pi phased antenna array with a higher frequency 130 MHz source, demonstrated that those remedies can indeed work. Looking to the future, one seeks additional ways in which IBWH can improve tokamak performance. The strong ponderomotive potential of the IBWH antenna may be used to stabilize external kinks and, acting as an rf limiter, to control the plasma edge. Control of the plasma pressure profile with local IBWH heating is already an important part of the Princeton Beta Experiment-Modified (PBX-M) [Ninth Topical Conference on Radio-Frequency Power in Plasmas, Charleston, SC, 1991 (American Institute of Physics, New York, 1991), p. 1291 program in its exploration of the second-stability regime. Application of IBWH may also improve the performance of neutral beam heating and the efficiency and localization of lower-hybrid current drive for current profile control. Used with pellet injection, IBWH may also prolong the period of good confinement. The three planned high-power IBWH experiments covering vastly different parameters: f = 40-80 MHz for PBX-M; f = 130 MHz for JIPPT-II-U; and f = 430 MHz for the Frascati Tokamak-Upgrade (FT-U) [16th European Physical Society Conference on Controlled Fusion and Plasma Physics, Venice, Italy, 1989 (European Physical Society, Amsterdam, 1989), Vol. III, p. 1069] appear to be well positioned to explore these possibilities and to clarify other issues including the physics of wave launching and associated nonlinear processes. RP ONO, M (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543, USA. NR 129 TC 106 Z9 106 U1 2 U2 21 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 FEB PY 1993 VL 5 IS 2 BP 241 EP 280 DI 10.1063/1.860569 PG 40 WC Physics, Fluids & Plasmas SC Physics GA KL787 UT WOS:A1993KL78700001 ER PT J AU PERKINS, FW BARNES, CW JOHNSON, DW SCOTT, SD ZARNSTORFF, MC BELL, MG BELL, RE BUSH, CE GREK, B HILL, KW MANSFIELD, DK PARK, H RAMSEY, AT SCHIVELL, J STRATTON, BC SYNAKOWSKI, E AF PERKINS, FW BARNES, CW JOHNSON, DW SCOTT, SD ZARNSTORFF, MC BELL, MG BELL, RE BUSH, CE GREK, B HILL, KW MANSFIELD, DK PARK, H RAMSEY, AT SCHIVELL, J STRATTON, BC SYNAKOWSKI, E TI NONDIMENSIONAL TRANSPORT SCALING IN THE TOKAMAK FUSION TEST REACTOR - IS TOKAMAK TRANSPORT BOHM OR GYRO-BOHM SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID GRADIENT-DRIVEN TURBULENCE; CONVECTIVE-CELL TURBULENCE; ENERGY CONFINEMENT; DIII-D; ANOMALOUS TRANSPORT; DRIFT INSTABILITIES; EDGE TURBULENCE; MAGNETIC-FIELD; PLASMA; MODE AB General plasma physics principles state that power flow Q(r) through a magnetic surface in a tokamak should scale as Q(r) = {32pi2Rr3T(e)2c n(e)a/[eB(a2 - r2)2]} F(rho*,beta,nu*,r/a,q,s,r/R,...) where the arguments of F are local, nondimensional plasma parameters and nondimensional gradients. This paper reports an experimental determination of how F varies with normalized gyroradius rho* = (2T(e)M(i)1/2c/eBa and collisionality nu* = (R/r)3/2qRnu(e)(m(e)/2T(e))1/2 for discharges prepared so that other nondimensional parameters remain close to constant. Tokamak Fusion Test Reactor (TFTR) [D. M. Meade et al., in Plasma Physics and Controlled Nuclear Fusion Research, 1990, Proceedings of the 13th International Conference, Washington (International Atomic Energy Agency, Vienna, 1991), Vol. 1, p. 9] L-mode data show F to be independent of rho* and numerically small, corresponding to Bohm scaling with a small multiplicative constant. By contrast, most theories predict gyro-Bohm scaling: F is-proportional-to rho*. Bohm scaling implies that the largest scale size for microinstability turbulence depends on machine size. Analysis of a collisionality scan finds Bohm-normalized power flow to be independent of collisionality. Implications for future theory, experiment, and reactor extrapolations are discussed. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP PERKINS, FW (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 69 TC 113 Z9 113 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 FEB PY 1993 VL 5 IS 2 BP 477 EP 498 DI 10.1063/1.860534 PG 22 WC Physics, Fluids & Plasmas SC Physics GA KL787 UT WOS:A1993KL78700021 ER PT J AU DAHLBURG, JP GARDNER, JH DOOLEN, GD HAAN, SW AF DAHLBURG, JP GARDNER, JH DOOLEN, GD HAAN, SW TI THE EFFECT OF SHAPE IN THE 3-DIMENSIONAL ABLATIVE RAYLEIGH-TAYLOR INSTABILITY .1. SINGLE-MODE PERTURBATIONS SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID HYDRODYNAMIC INSTABILITIES; NUMERICAL-SIMULATION; FUSION; GROWTH AB The nonlinear saturation amplitudes attained by Rayleigh-Taylor perturbations growing on ablatively stabilized laser fusion targets are crucial in determining the survival time of those targets. For a given set of baseline simulation parameters, the peak amplitude is found to be a progressive function of cross-sectional perturbation shape as well as of wave number, with three-dimensional (3-D) square modes and two-dimensional (2-D) axisymmetric bubbles saturating later, and at higher amplitudes than two-dimensional planar modes. In late nonlinear times hydrodynamic evolution diverges; the 3-D square mode bubble continues to widen, while the 2-D axisymmetric bubble fills in. C1 LOS ALAMOS NATL LAB, CTR NONLINEAR STUDIES, LOS ALAMOS, NM 87545 USA. LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. RP USN, RES LAB, COMPUTAT PHYS & FLUID DYNAM LAB, WASHINGTON, DC 20375 USA. NR 25 TC 36 Z9 36 U1 1 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD FEB PY 1993 VL 5 IS 2 BP 571 EP 584 DI 10.1063/1.860543 PG 14 WC Physics, Fluids & Plasmas SC Physics GA KL787 UT WOS:A1993KL78700030 ER PT J AU ROSE, HA DUBOIS, DF AF ROSE, HA DUBOIS, DF TI STATISTICAL PROPERTIES OF LASER HOT-SPOTS PRODUCED BY A RANDOM PHASE PLATE SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID STIMULATED RAMAN-SCATTERING; INDUCED SPATIAL INCOHERENCE; SMOOTHING TECHNIQUES; PLASMAS; FILAMENTATION; BEAM AB A quantitative theory of laser hot spots, which control plasma instabilities in real laser-plasma interactions, is presented in the case of random phase plate (RPP) optics. It is shown that the probability density of intense hot spots with intensity I, P(hot)(I), is given by P(hot)(I) approximately (I/I0(2))exp (-I/I0) where I0 is the average intensity, and that the detailed amplitude and phase variation of the laser field in the vicinity of an intense hot spot is uniquely specified by the optics and is deterministic. These hot spots may be the source of below threshold stimulated Raman scattering (SRS) and its variation with I0 is shown to be super exponential. A brief preview of a quantitative nonlinear theory of hot-spot-induced laser filamentation is presented. RP ROSE, HA (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 9 TC 95 Z9 95 U1 1 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 FEB PY 1993 VL 5 IS 2 BP 590 EP 596 DI 10.1063/1.860545 PG 7 WC Physics, Fluids & Plasmas SC Physics GA KL787 UT WOS:A1993KL78700032 ER PT J AU SCHWAGER, LA HSU, WL TUNG, DM AF SCHWAGER, LA HSU, WL TUNG, DM TI EFFECTS OF COLD ELECTRON-EMISSION ON THE PLASMA SHEATH SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID FIELD AB The use of surfaces that emit cold electrons into a plasma has been shown to reduce the sheath potential drop by at least a factor of 2.6. This effect can be used to mitigate sputtering by causing a reduction of the mean energy of ions striking the emissive surface. The present study has been motivated by the severe sputtering problems that may occur at the divertor plate of a full power fusion reactor. In addition, secondary electron emission is a common occurrence at the bounding surface of a plasma, and so should be accounted for in the plasma analysis. Kinetic theory shows that, for a hydrogen plasma (singly charged, mean ion mass of 2.5 amu) with an electron temperature of T(e) and ion temperature of 0.1 T(e), emission reduces the sheath potential drop from 3.9 T(e) to 1.5 T(e). This reduction occurs when the surface emits a cold electron current that is increased to nine times the incident ion current. For comparison with theory, thermionic electron emission has been studied in a hydrogen plasma (composed mostly of H-3+) powered by inductive coupling from an rf coil. The plasma was in contact with an electrically isolated surface of tungsten impregnated with barium scandate. Plasma potential was measured with a Langmuir probe and with a mass and energy analyzer that sampled the energy distribution of ions passing through an aperture in the emissive surface. As the surface temperature was increased, the surface potential floated up to the plasma space potential so that the ion energy at the surface dropped from 5T(e) for temperatures below 570-degrees-C to less than 1T(e) for temperatures above 680-degrees-C. The Richardson equation, which determined emission current as a function of surface temperature, and the above kinetic theory, was used to predict that the reduction in potential drop should occur from 420-degrees-C to 510-degrees-C. The abrupt reduction in ion energy over a narrow range of surface temperature was observed experimentally as predicted; however, the sudden reduction began at a surface temperature of 600-degrees-C rather than 420-degrees-C. The delayed onset of emission was probably caused by the sputtering removal rate of the impregnate at the surface exceeding the replenishment rate from the bulk for disk temperatures below the normal operating range. C1 SANDIA NATL LABS,LIVERMORE,CA 94551. NR 22 TC 14 Z9 14 U1 4 U2 11 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 FEB PY 1993 VL 5 IS 2 BP 621 EP 630 DI 10.1063/1.860494 PG 10 WC Physics, Fluids & Plasmas SC Physics GA KL787 UT WOS:A1993KL78700036 ER PT J AU SCHWAGER, LA AF SCHWAGER, LA TI EFFECTS OF SECONDARY AND THERMIONIC ELECTRON-EMISSION ON THE COLLECTOR AND SOURCE SHEATHS OF A FINITE ION TEMPERATURE PLASMA USING KINETIC-THEORY AND NUMERICAL-SIMULATION SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID COLLISIONLESS AB The region between a Maxwellian plasma source and an absorbing surface that emits cool electrons is modeled numerically with dynamic, electrostatic particle simulation and theoretically with a static, kinetic plasma-sheath model. Steady-state emission results are applied specifically to secondary electrons that are induced by either incident ions or electrons, but are also valid for thermionic and photoelectrons. The ratio of the emitted electron current to incident electron current is varied up to and beyond the critical emission coefficient (ratio) that causes electric field reversal at the collector. Results from these models agree very well over the range from zero to five times the critical emission coefficient. Increasing the secondary emission coefficient is found to reduce the collector potential and decrease the ion energy deposited, yet increase the total energy flux to the collector. In the simulation, some heating of the secondary electron stream is observed to gradually evolve over many Debye lengths, possibly because of a beam-plasma interaction. This heating increases potential fluctuations but causes only small deviations from the predictions with static theory. RP SCHWAGER, LA (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 16 TC 75 Z9 76 U1 3 U2 6 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 FEB PY 1993 VL 5 IS 2 BP 631 EP 645 DI 10.1063/1.860495 PG 15 WC Physics, Fluids & Plasmas SC Physics GA KL787 UT WOS:A1993KL78700037 ER PT J AU KROMMES, JA AF KROMMES, JA TI EQUILIBRIUM STATISTICAL CONSTRAINTS AND THE GUIDING-CENTER PLASMA SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Note ID TURBULENCE THEORY; FLUCTUATION AB A pedagogical calculation based on the thermal-equilibrium guiding-center plasma model is used to illustrate deep consistency relations that the nonlinear dielectric response must obey. It is shown that these are satisfied by both the direct-interaction approximation and a related Markovian statistical closure. RP KROMMES, JA (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 22 TC 10 Z9 10 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 FEB PY 1993 VL 5 IS 2 BP 650 EP 653 DI 10.1063/1.860497 PG 4 WC Physics, Fluids & Plasmas SC Physics GA KL787 UT WOS:A1993KL78700039 ER PT J AU MIZUNO, K DRAKE, RP YOUNG, PE BAHR, R SEKA, W ESTABROOK, KG AF MIZUNO, K DRAKE, RP YOUNG, PE BAHR, R SEKA, W ESTABROOK, KG TI ION-ACOUSTIC PARAMETRIC DECAY INSTABILITY IN LASER-PRODUCED PLASMA WITH VARYING IONIC CHARGE - REPLY SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Letter AB The authors of the comment have correctly identified an area in which our paper is neither sufficiently clear nor fully correct. Unfortunately, we do not agree with their equations or their physical arguments. RP MIZUNO, K (reprint author), LAWRENCE LIVERMORE NATL LAB,PLASMA PHYS RES INST,L-418,POB 808,LIVERMORE,CA 94550, USA. RI Drake, R Paul/I-9218-2012 OI Drake, R Paul/0000-0002-5450-9844 NR 5 TC 0 Z9 0 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 FEB PY 1993 VL 5 IS 2 BP 656 EP 656 DI 10.1063/1.860499 PG 1 WC Physics, Fluids & Plasmas SC Physics GA KL787 UT WOS:A1993KL78700041 ER PT J AU VOSS, KE FISCH, NJ AF VOSS, KE FISCH, NJ TI INVERSE PROBLEM FOR BREMSSTRAHLUNG RADIATION (PHYS FLUIDS, VOL B4, PG 762, 1992) SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Correction, Addition RP VOSS, KE (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543, USA. NR 2 TC 10 Z9 10 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 FEB PY 1993 VL 5 IS 2 BP 659 EP 659 DI 10.1063/1.860980 PG 1 WC Physics, Fluids & Plasmas SC Physics GA KL787 UT WOS:A1993KL78700044 ER PT J AU ZHAO, YS WEIDNER, DJ PARISE, JB COX, DE AF ZHAO, YS WEIDNER, DJ PARISE, JB COX, DE TI THERMAL-EXPANSION AND STRUCTURAL DISTORTION OF PEROVSKITE - DATA FOR NAMGF3 PEROVSKITE .1. SO PHYSICS OF THE EARTH AND PLANETARY INTERIORS LA English DT Article ID CRYSTAL AB The crystal structure of NaMgF3 perovskite (Neighborite) has been studied at high temperature by X-ray powder diffraction. Data were collected using a position sensitive detector with a monochromatic synchroton radiation source. Changes in unit cell and atomic positions of the perovskite structure were defined using the Rietveld refinement technique. The linear and volumetric thermal expansion coefficients are observed to be alpha(a) = 4.04 x 10(-5) K-1, alpha(b) = 1.53 x 10(-5) K-1, alpha(c) = 3.06 X 10(-5) K-1, alpha(v) = 8.80 x 10(-5) K-1 for the orthorhombic Pbnm phase, and alpha(a0) = 3.16 x 10(-5) K-1, alpha(v0) = 9.49 x 10(-5) K-1 for the cubic Pm3m phase of NaMgF3 perovskite, respectively. The temperature-induced linear and volumetric changes of the centrosymmetrically distorted ABX3 Perovskite structure can be empirically expressed as a combination of the change of the (B-X) bond length and the change of tilting of the BX6 octahedral framework. The considerable anisotropy of linear thermal expansion, alpha(a) > alpha(c) > alpha(b), for the orthorhombic Pbnm phase reflects the progressive decrease of structural distortion and the development of the phase transition of the NaMgF3 perovskite. The tilting angle of the MgF6 octahedral framework is observed to decrease rapidly toward zero as the temperature approaches T(c) = 765-degrees-C in the manner expected for a ferroelastic phase transition. More interestingly, the apparent (Mg-F) bond lengths of the MgF6 octahedra shrink dramatically throughout a temperature interval of about 100-degrees-C before the phase transition. The volumetric thermal expansion increases drastically in a critical manner as the temperature approaches T(c). C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP ZHAO, YS (reprint author), SUNY STONY BROOK,DEPT EARTH & SPACE SCI,INST MINERAL PHYS,CTR HIGH PRESSURE RES,STONY BROOK,NY 11794, USA. NR 16 TC 117 Z9 120 U1 1 U2 29 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0031-9201 J9 PHYS EARTH PLANET IN JI Phys. Earth Planet. Inter. PD FEB PY 1993 VL 76 IS 1-2 BP 1 EP 16 DI 10.1016/0031-9201(93)90051-A PG 16 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KP817 UT WOS:A1993KP81700001 ER PT J AU ZHAO, YS WEIDNER, DJ PARISE, JB COX, DE AF ZHAO, YS WEIDNER, DJ PARISE, JB COX, DE TI CRITICAL PHENOMENA AND PHASE-TRANSITION OF PEROVSKITE DATA FOR NAMGF3 PEROVSKITE .2. SO PHYSICS OF THE EARTH AND PLANETARY INTERIORS LA English DT Article ID SPONTANEOUS STRAIN; FERROELASTICS; BEHAVIOR; MGSIO3 AB The crystal structure of NaMgF3 perovskite is observed to transform directly from orthorhombic (Pbnm) to cubic (Pm3m) at a temperature of T(c) = 765-degrees-C. Superlattice diffractions associated with in-phase and anti-phase octahedral tilts vanish simultaneously at the transition temperature. The intensities of the superlattice diffractions, the atomic displacements, and the octahedral tilts follow a Landau type of critical behavior as the temperature approaches T(c). The structural phase transition in NaMgF3 perovskite can be modelled as a tricritical ferroelastic phase transition. The octahedral tilts theta and phi represent the primary order parameters of the phase transition, and the coupling between these two order parameters are observed to be bi-quadratic. The spontaneous strain for the m3mFmmm ferroelastic species is derived in terms of lattice parameters and its relation to the ferroelastic species m3mF4/mmm and 4/mmm Fmmm are discussed. It is demonstrated experimentally that the coupling between the spontaneous strain and the octahedral tilts of perovskites is in a linear-quadratic form. Excess physical properties (thermal expansion and heat capacity, etc.) are observed to have a lambda-anomaly during the structural phase transition in NaMgF3 perovskite, and are considered to be directly associated with the excess Gibbs free energy. C1 BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA. RP SUNY STONY BROOK, INST MINERAL PHYS, CTR HIGH PRESSURE RES, STONY BROOK, NY 11794 USA. NR 38 TC 80 Z9 84 U1 3 U2 22 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0031-9201 EI 1872-7395 J9 PHYS EARTH PLANET IN JI Phys. Earth Planet. Inter. PD FEB PY 1993 VL 76 IS 1-2 BP 17 EP 34 DI 10.1016/0031-9201(93)90052-B PG 18 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KP817 UT WOS:A1993KP81700002 ER PT J AU DAVIS, JC KAY, DA AF DAVIS, JC KAY, DA TI HOW CLOSE WAS IRAQ TO HAVING THE BOMB - REPLY SO PHYSICS TODAY LA English DT Letter C1 URANIUM INST,LONDON,ENGLAND. RP DAVIS, JC (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, 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 FEB PY 1993 VL 46 IS 2 BP 11 EP 11 PG 1 WC Physics, Multidisciplinary SC Physics GA KM951 UT WOS:A1993KM95100003 ER PT J AU HARVEY, BG AF HARVEY, BG TI ARE THE DATA NEUTRAL ON NEUTRON HALOS SO PHYSICS TODAY LA English DT Letter RP HARVEY, BG (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 1 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 FEB PY 1993 VL 46 IS 2 BP 13 EP 13 PG 1 WC Physics, Multidisciplinary SC Physics GA KM951 UT WOS:A1993KM95100004 ER PT J AU BOSTOCK, JL BROMLEY, DA GOMORY, RE KLEPPNER, D LIBCHABER, AJ MASSEY, WE SCHRIESHEIM, A ZARE, RN LUBKIN, GB GOODWIN, I AF BOSTOCK, JL BROMLEY, DA GOMORY, RE KLEPPNER, D LIBCHABER, AJ MASSEY, WE SCHRIESHEIM, A ZARE, RN LUBKIN, GB GOODWIN, I TI ROUND-TABLE - PHYSICS IN TRANSITION SO PHYSICS TODAY LA English DT Discussion C1 MIT,CAMBRIDGE,MA 02139. ARGONNE NATL LAB,ARGONNE,IL 60439. ALFRED P SLOANE FDN,NEW YORK,NY. PRINCETON UNIV,PRINCETON,NJ 08544. STANFORD UNIV,STANFORD,CA 94305. NATL SCI FDN,WASHINGTON,DC 20550. NR 0 TC 0 Z9 0 U1 0 U2 1 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 FEB PY 1993 VL 46 IS 2 BP 36 EP 47 DI 10.1063/1.881372 PG 12 WC Physics, Multidisciplinary SC Physics GA KM951 UT WOS:A1993KM95100012 ER PT J AU LONG, SP POSTL, WF BOLHARNORDENKAMPF, HR AF LONG, SP POSTL, WF BOLHARNORDENKAMPF, HR TI QUANTUM YIELDS FOR UPTAKE OF CARBON-DIOXIDE IN C-3 VASCULAR PLANTS OF CONTRASTING HABITATS AND TAXONOMIC GROUPINGS SO PLANTA LA English DT Article DE C3 PLANT; PHOTOSYNTHESIS; QUANTUM YIELD (O-2, CO2 UPTAKE) ID CHLOROPHYLL FLUORESCENCE; CO2 UPTAKE; O-2 EVOLUTION; WATER-VAPOR; PHOTOSYNTHESIS; LIGHT; RESPIRATION; DEPENDENCE; NITROGEN; LEAVES AB The maximum quantum yields (phi(a,c)) for CO2 uptake in low-oxygen atmospheres were determined for 11 species of C3 vascular plants of diverse taxa, habitat and life form using an Ulbricht-sphere leaf chamber. Comparisons were also made between tissues of varied age within species. The species examined were Psilotum nudum (L.) P. Beauv., Davallia bullata Wall. ex Hook., Cycas revoluta Thunb., Araucaria heterophylla (Salisb.) Franco, Picea abies (L.) Karst., Nerium oleander L., Ruellia humilis Nutt., Pilea microphylla (L.) Karst., Beaucarnea stricta Lem., Oplismenus hirtellus (L.) P. Beauv. and Poa annua L. Quantum yields were calculated from the initial slopes of the response of CO2 uptake to the quantity of photons absorbed in conditions of diffuse lighting. Regression analysis of variance of the initial slopes of the response of CO2 uptake to photon absorption failed to show any statistically significant differences between age classes within species or between the mature photosynthetic organs of different species. The constancy of phi(a,c) was apparent despite marked variation in the light-saturated rates of CO2 uptake within and between species. The mean phi(a,c) was 0.093 +/- 0.003 for 11 species. By contrast, surface absorptance varied markedly between species from 0.90 to 0.60, producing proportional variation in the quantum yield calculated on an incident-light basis. The ratio of variable to maximum fluorescence emission at 695 nm for the same tissues also failed to show any statistically significant variation between species, with a mean of 0.838 +/- 0.008. Mean values of phi(a,c) reported here for C3 species, in the absence of photorespiration, are higher than reported in previous surveys of vascular plants, but consistent with recent estimates of the quantum yields of O2 evolution. C1 UNIV ESSEX, DEPT BIOL, COLCHESTER CO4 3SQ, ESSEX, ENGLAND. UNIV WIEN, INST PFLANZENPHYSIOL, A-1091 VIENNA, AUSTRIA. RP LONG, SP (reprint author), BROOKHAVEN NATL LAB, DEPT APPL SCI, BLDG 318, UPTON, NY 11973 USA. RI Long, Stephen/A-2488-2008 OI Long, Stephen/0000-0002-8501-7164 NR 27 TC 99 Z9 99 U1 1 U2 19 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0032-0935 J9 PLANTA JI Planta PD FEB PY 1993 VL 189 IS 2 BP 226 EP 234 PG 9 WC Plant Sciences SC Plant Sciences GA KK121 UT WOS:A1993KK12100009 ER PT J AU FISCH, NJ AF FISCH, NJ TI REVIEW OF CURRENT DRIVE THEORY - SELECTED TOPICS SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT EUROPHYSICS TOPICAL CONF ON RADIOFREQUENCY HEATING AND CURRENT DRIVE OF FUSION DEVICES CY JUL 08-10, 1992 CL BRUSSELS, BELGIUM DE CURRENT DRIVE; TOKAMAKS; RF WAVES ID PLASMAS; TOKAMAK; WAVES AB Two themes in current drive theory in tokamaks are reviewed, both relevant to the progression of tokamak experiments toward the reactor regime. First, we review our understanding of the physics of the tail electrons. These electrons are capable of carrying enormous rf-driven electric current, and, in the course of current-drive experiments worldwide -not only has the current drive effect been demonstrated, but the underlying physical description of these tail electrons has been established. Second, anticipating the presence of the energetic alpha particles that result from D-T reactions in a reactor, we examine certain mechanisms through which these alpha particles can be used to facilitate current-drive. RP FISCH, NJ (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543, USA. NR 15 TC 8 Z9 8 U1 1 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD FEB PY 1993 VL 35 SU A BP A91 EP A104 DI 10.1088/0741-3335/35/SA/006 PG 14 WC Physics, Fluids & Plasmas SC Physics GA LG958 UT WOS:A1993LG95800007 ER PT J AU MESSIAEN, AM VANEESTER, D KOCH, R ONGENA, J VANWASSENHOVE, G WEYNANTS, RR BORGERMANS, P CONRADS, H DUMORTIER, P DURODIE, F FUCHS, G EURINGER, H GIESEN, B HILLIS, D HOENEN, F KOSLOWSKI, HR KRAMERFLECKEN, A LOCHTER, M OYEVAAR, T SOLTWISCH, H TAMMEN, HF TELESCA, G UHLEMANN, R VANDENDURPEL, L VANDENPLAS, PE SOLTWISCH, H TAMMEN, HF TELESCA, G UHLEMANN, R VANDENDURPEL, L VANDENPLAS, PE VANNIEUWENHOVE, R VANOOST, G VERVIER, M WAIDMANN, G AF MESSIAEN, AM VANEESTER, D KOCH, R ONGENA, J VANWASSENHOVE, G WEYNANTS, RR BORGERMANS, P CONRADS, H DUMORTIER, P DURODIE, F FUCHS, G EURINGER, H GIESEN, B HILLIS, D HOENEN, F KOSLOWSKI, HR KRAMERFLECKEN, A LOCHTER, M OYEVAAR, T SOLTWISCH, H TAMMEN, HF TELESCA, G UHLEMANN, R VANDENDURPEL, L VANDENPLAS, PE SOLTWISCH, H TAMMEN, HF TELESCA, G UHLEMANN, R VANDENDURPEL, L VANDENPLAS, PE VANNIEUWENHOVE, R VANOOST, G VERVIER, M WAIDMANN, G TI REVIEW OF RECENT ADVANCES IN HEATING AND CURRENT DRIVE ON TEXTOR SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article DE COMBINED NBI-ICRH HEATING AT 2-AND-3-AND,CD; SYNERGISTIC EFFECTS; ENHANCED CONFINEMENT; CURRENT DRIVE; HOT ION MODE; FOKKER PLANCK CODE; BEAM-RF INTERACTION ID NEUTRAL INJECTION; TOROIDAL PLASMAS; TOKAMAK; ICRH AB Co-injection (DO --> D+) applied to TEXTOR leads to a hot ion node regime with enhanced confinement. A synergistic increase of the beam effects is observed with the addition of ICRH at omega = 2omega(cD) = omega(cH) (H minority heating scenario) resulting, beside other reviewed effects, in a significant increase of the ion temperature and of the beam driven current (respectively larger than 30 % and 50 % for the addition of an RF power comparable to the NBI one). The large ion heating efficiency of ICRH also remains when ICRH is added to balanced injection and the hot ion mode regime remains up to the maximum achieved beta (=2/3 of the Troyan limit with more than 6MW of auxiliary heating). ICRH also leads to the formation of a more 'isotropic' tail. These results are interpreted with the help of a Fokker-Planck code which computes the beam distribution function in presence of RF and of TRANSP simulations. The amount of RF absorption by the H minority by the ion beam and die bulk plasma is theoretically evaluated. It is shown that a large part of the synergistic effects can be explained by the rise of the electron temperature due to the minority heating which increases the beam slowing down time and its critical energy. A smaller contribution to the effects is due to direct coupling of the RF power to the beam (less than 10 % of the total RF absorbed power) and to the decrease of the plasma toroidal rotation induced by the RF. ICRH has also been added to co-injection at omega = 3omega(CD). In this case no minority heating is present and the RF energy coupling to the beam is one of the dominant effects. It leads to the formation of a very energetic tail of the ion beam with a strong increase of the beam-target neutron reactivity. C1 FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, INST PLASMAPHYS, ASSOC EURATOM, W-5170 JULICH 1, GERMANY. FOM, INST PLASMAFYS RIJNHUIZEN, ASSOC EURATOM, 3430 BE NIEUWEGEIN, NETHERLANDS. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. RP MESSIAEN, AM (reprint author), ECOLE ROYALE MIL, ASSOC EURATOM ETAT BELGE, PHYS PLASMAS LAB, B-1040 BRUSSELS, BELGIUM. NR 25 TC 6 Z9 6 U1 0 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD FEB PY 1993 VL 35 BP A15 EP A34 DI 10.1088/0741-3335/35/SA/002 PG 20 WC Physics, Fluids & Plasmas SC Physics GA LG958 UT WOS:A1993LG95800003 ER PT J AU PRATER, R JAMES, RA PETTY, CC PINSKER, RI PORKOLAB, M BAITY, FW CHIU, SC DEGRASSIE, JS GOULDING, RH HARVEY, RW HOFFMAN, DJ IKEZI, H KAWASHIMA, H LINLIU, YR LUCE, TC TRUKHIN, V AF PRATER, R JAMES, RA PETTY, CC PINSKER, RI PORKOLAB, M BAITY, FW CHIU, SC DEGRASSIE, JS GOULDING, RH HARVEY, RW HOFFMAN, DJ IKEZI, H KAWASHIMA, H LINLIU, YR LUCE, TC TRUKHIN, V TI CURRENT DRIVE WITH FAST WAVES, ELECTRON-CYCLOTRON WAVES, AND NEUTRAL INJECTION IN THE DIII-D TOKAMAK SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT EUROPHYSICS TOPICAL CONF ON RADIOFREQUENCY HEATING AND CURRENT DRIVE OF FUSION DEVICES CY JUL 08-10, 1992 CL BRUSSELS, BELGIUM DE PLASMA HEATING; CURRENT DRIVE; FAST WAVE CURRENT DRIVE ID CONFINEMENT; PLASMAS; REGIME; BETA AB Current drive experiments have been performed on the DIII-D tokamak using fast waves, electron cyclotron waves, and neutral injection. Fast wave experiments were performed using a 4-strap antenna with 1 MW of power at 60 MHz. These experiments showed effective heating of electrons, with a global heating efficiency equivalent to that of neutral injection even when the single pass damping was calculated to be as small as 5%. The damping was probably due to the effect of multiple passes of the wave through the plasma. Fast wave current drive experiments were performed with a toroidally directional phasing of the antenna straps. Currents driven by fast wave current drive (FWCD) in the direction of the main plasma current of up to 100 kA were found, not including a calculated 40 kA of bootstrap current. Experiments with FWCD in the counter current direction showed little current drive. In both cases, changes in the sawtooth behavior and the internal inductance qualitatively support the measurement of FWCD. Experiments on electron cyclotron current drive have shown that 100 kA of current can be driven by 1 MW of power at 60 GHz. Calculations with a Fokker-Planck code show that electron cyclotron current drive (ECCD) can be well predicted when the effects of electron trapping and of the residual electric field axe included. Experiments on driving current with neutral injection showed that effective current drive could be obtained and discharges with full current drive were demonstrated. Interestingly, all of these methods of current drive had about the same efficiency, 0.015 x 10(20) MA/MW/m2. C1 JAPAN ATOM ENERGY RES INST,TOKAI,IBARAKI 31911,JAPAN. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. MIT,CAMBRIDGE,MA 02139. OAK RIDGE NATL LAB,OAK RIDGE,TN. IV KURCHATOV INST,MOSCOW,RUSSIA. RP PRATER, R (reprint author), GEN ATOM CO,SAN DIEGO,CA 92138, USA. NR 45 TC 19 Z9 19 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD FEB PY 1993 VL 35 SU A BP A53 EP A70 DI 10.1088/0741-3335/35/SA/004 PG 18 WC Physics, Fluids & Plasmas SC Physics GA LG958 UT WOS:A1993LG95800005 ER PT J AU REYNOLDS, JG JONES, EL HUFFMAN, JC CHRISTOU, G AF REYNOLDS, JG JONES, EL HUFFMAN, JC CHRISTOU, G TI DEOXYGENATION OF OXOVANADIUM(IV) COMPLEXES UNDER MILD CONDITIONS - CONVERSION OF VANADYL SPECIES TO THE CORRESPONDING DIHALIDES WITH CARBOXYLIC-ACID HALIDES SO POLYHEDRON LA English DT Article ID ELECTRON-SPIN-RESONANCE; VANADIUM(IV) AB A new procedure for the deoxygenation of VO2+ complexes utilizing carboxylic acid halides in toluene or methylene chloride has been successfully applied to several vanadyl complexes with different ligand types. Facile conversion of vanadyl beta-diketonates, dialkyldithiocarbamates, beta-ketiiminates, 8-quinolinolate and porphyrin complexes to the corresponding dihalide complexes has been achieved, demonstrating the general application of the synthetic method. The beta-diketonate complexes were studied in the greatest detail. VX2(Y)2 (X = Cl, Br; Y = CH3COCHCOCH3, CH3COCHCOC6H5) were synthesized in high yield, and the single-crystal X-ray structure of VCl2(CH3COCHCOCH3)2 was obtained. The structure contains a mononuclear unit with trans-chloride ligands and distorted octahedral symmetry. The complexes were examined by IR; the spectra exhibited the characteristic loss of the V=O band at approximately 1000 cm-1. For VX2(CH3 COCHCOCH3)2 the ligand bands indicate more delocalization of charge onto the ligands compared with the vanadyl starting material, which is consistent with the trans octahedral geometry of VCl2(CH3COCHCOCH3)2 and its co-planar chelate ligands. The UV vis spectra show a weak maximum around 600-700 nm with epsilon(m) of approximately 2000 dm3 mol cm-1, typical of dihalogenated complexes. C1 INDIANA UNIV,DEPT CHEM,BLOOMINGTON,IN 47405. INDIANA UNIV,CTR MOLEC STRUCT,BLOOMINGTON,IN 47405. RP REYNOLDS, JG (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. RI Christou, George /A-3072-2014 NR 24 TC 10 Z9 10 U1 0 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0277-5387 J9 POLYHEDRON JI Polyhedron PD FEB PY 1993 VL 12 IS 4 BP 407 EP 414 DI 10.1016/S0277-5387(00)81745-3 PG 8 WC Chemistry, Inorganic & Nuclear; Crystallography SC Chemistry; Crystallography GA KQ528 UT WOS:A1993KQ52800009 ER PT J AU COOPER, KD HALL, MW HOOD, RT KENNEDY, K MCKINLEY, KS MELLORCRUMMEY, JM TORCZON, L WARREN, SK AF COOPER, KD HALL, MW HOOD, RT KENNEDY, K MCKINLEY, KS MELLORCRUMMEY, JM TORCZON, L WARREN, SK TI THE PARASCOPE PARALLEL PROGRAMMING ENVIRONMENT SO PROCEEDINGS OF THE IEEE LA English DT Article ID OPTIMIZATION AB The ParaScope parallel programming environment, developed to support scientific programming of shared-memory multiprocessors, includes a collection of tools that use global program analysis to help users develop and debug parallel programs. This paper focuses on ParaScope's compilation system, its parallel program editor, and its parallel debugging system. The compilation system extends the traditional single-procedure compiler by providing a mechanism for managing the compilation of complete programs. Thus, ParaScope can support both traditional single-procedure optimization and optimization across procedure boundaries. The ParaScope editor brings both compiler analysis and user expertise to bear on program parallelization. It assists the knowledgeable user by displaying and managing analysis and by providing a variety of interactive program transformations that are effective in exposing parallelism. The debugging system detects and reports timing-dependent errors, called data races, in execution of parallel programs. The system combines static analysis, program instrumentation, and run-time reporting to provide a mechanical system for isolating errors in parallel program executions. Finally, we describe a new project to extend ParaScope to support programming in Fortran D, a machine-independent parallel programming language intended for use with both distributed-memory and shared-memory parallel computers. C1 STANFORD UNIV,CTR INTEGRATED SYST,STANFORD,CA 94305. KUBOTA PACIFIC COMP INC,SANTA CLARA,CA 95051. ROSETTA INC,HOUSTON,TX 77005. RICE UNIV,CTR RES PARALLEL COMP,HOUSTON,TX 77251. UNIV TENNESSEE,CTR RES PARALLEL TECHNOL,KNOXVILLE,TN 37996. UNIV TENNESSEE,CTR NSF SCI & TECHNOL,KNOXVILLE,TN 37996. SYRACUSE UNIV,CTR RES PARALLEL TECHNOL,SYRACUSE,NY 13244. SYRACUSE UNIV,CTR NSF SCI & TECHNOL,SYRACUSE,NY 13244. RICE UNIV,CTR NSF SCI & TECHNOL,HOUSTON,TX 77251. CALTECH,CTR NSF SCI & TECHNOL,PASADENA,CA 91125. CALTECH,CTR RES PARALLEL COMPUTAT,PASADENA,CA 91125. LOS ALAMOS NATL LAB,CTR NSF SCI & TECHNOL,LOS ALAMOS,NM 87544. LOS ALAMOS NATL LAB,CTR RES PARALLEL COMPUTAT,LOS ALAMOS,NM 87544. ARGONNE NATL LAB,CTR NSF SCI & TECHNOL,ARGONNE,IL 60439. ARGONNE NATL LAB,CTR RES PARALLEL COMPUTAT,ARGONNE,IL 60439. RP COOPER, KD (reprint author), RICE UNIV,DEPT COMP SCI,HOUSTON,TX 77251, USA. NR 79 TC 30 Z9 30 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9219 J9 P IEEE JI Proc. IEEE PD FEB PY 1993 VL 81 IS 2 BP 244 EP 263 DI 10.1109/5.214549 PG 20 WC Engineering, Electrical & Electronic SC Engineering GA LC115 UT WOS:A1993LC11500007 ER PT J AU QUINTENZ, JP AF QUINTENZ, JP TI THEORY OF INSTABILITY-GENERATED DIVERGENCE OF INTENSE ION-BEAMS FROM APPLIED-B ION DIODES (VOL 80, PG 971, 1992) SO PROCEEDINGS OF THE IEEE LA English DT Correction, Addition RP QUINTENZ, JP (reprint author), SANDIA NATL LABS,DEPT 1206,ALBUQUERQUE,NM 87185, USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9219 J9 P IEEE JI Proc. IEEE PD FEB PY 1993 VL 81 IS 2 BP 308 EP 308 PG 1 WC Engineering, Electrical & Electronic SC Engineering GA LC115 UT WOS:A1993LC11500013 ER PT J AU MCCORMICK, MK CAMPBELL, E DEAVEN, L MOYZIS, R AF MCCORMICK, MK CAMPBELL, E DEAVEN, L MOYZIS, R TI LOW-FREQUENCY CHIMERIC YEAST ARTIFICIAL CHROMOSOME LIBRARIES FROM FLOW-SORTED HUMAN CHROMOSOME-16 AND CHROMOSOME-21 SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID POLYMERASE CHAIN-REACTION; HUMAN XQ24-XQ28; DNA; CONSTRUCTION; SEQUENCES; TRANSFORMATION; CLONES; HLA AB Construction of chromosome-specific yeast artificial chromosome (YAC) libraries from sorted chromosomes was undertaken (i) to eliminate drawbacks associated with first-generation total genomic YAC libraries, such as the high frequency of chimeric YACs, and (ii) to provide an alternative method for generating chromosome-specific YAC libraries in addition to isolating such collections from a total genomic library. Chromosome-specific YAC libraries highly enriched for human chromosomes 16 and 21 were constructed. By maximizing the percentage of fragments with two ligatable ends and performing yeast transformations with less than saturating amounts of DNA in the presence of carrier DNA, YAC libraries with a low percentage of chimeric clones were obtained. The smaller number of YAC clones in these chromosome-specific libraries reduces the effort involved in PCR-based screening and allows hybridization methods to be a manageable screening approach. C1 LOS ALAMOS NATL LAB,CTR HUMAN GENOME STUDIES,LOS ALAMOS,NM 87544. RP MCCORMICK, MK (reprint author), LOS ALAMOS NATL LAB,DIV LIFE SCI,M880,LOS ALAMOS,NM 87544, USA. NR 20 TC 44 Z9 46 U1 0 U2 0 PU NATL ACAD SCIENCES 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 FEB 1 PY 1993 VL 90 IS 3 BP 1063 EP 1067 DI 10.1073/pnas.90.3.1063 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KK813 UT WOS:A1993KK81300060 PM 8430075 ER PT J AU ZUREK, WH AF ZUREK, WH TI PREFERRED STATES, PREDICTABILITY, CLASSICALITY AND THE ENVIRONMENT-INDUCED DECOHERENCE SO PROGRESS OF THEORETICAL PHYSICS LA English DT Article ID QUANTUM BROWNIAN-MOTION; WAVE PACKET; MECHANICS AB Selection of the preferred classical set of states in the process of decoherence is discussed with an emphasis on the role of correlations, information loss and entropy. Persistence of correlations between the observables of two systems (for instance, a record and a state of a system evolved from the initial conditions described,by that record) in the presence of the environment is used to define classical behavior. From the viewpoint of an observer (or any system capable of maintaining records and utilising information) predictability is a measure of such persistence. Predictability sieve - a procedure which employs both the statistical and algorithmic entropies to systematically explore all of the Hilbert space of an open system in order to eliminate the majority of the unpredictable and non-classical states, and to locate the islands of predictability including the preferred pointer basis, is proposed. The relation between the consistent histories approach and the preferred sets of states is considered. It is demonstrated that histories of sequences of events corresponding to projections onto the states of the pointer basis are consistent. The correspondence between the perceived reality and the evolving state of the quantum Universe based on a prolonged existence of states of individual systems and correlations between them is proposed. This emphasis on predictable existence of states of classical systems and records of classical observers suggests existential interpretation of quantum theory. Existential interpretation addresses the long-standing problem of the ''collapse of the wave function'' in a manner which goes beyond Everett's relative state and Bohr's Copenhagen interpretations, by identifying the collapse with the decay of non-classical superpositions of states (and of the observers records) into mixtures of preferred states chosen by the environment-induced superselection. RP ZUREK, WH (reprint author), LOS ALAMOS NATL LAB,T-6,MS B288,LOS ALAMOS,NM 87544, USA. NR 33 TC 310 Z9 310 U1 3 U2 11 PU KYOTO UNIV PI KYOTO PA YUKAWA HALL PROGRESS THEORETICAL PHYSICS, KYOTO 606-01, JAPAN SN 0033-068X J9 PROG THEOR PHYS JI Prog. Theor. Phys. PD FEB PY 1993 VL 89 IS 2 BP 281 EP 312 DI 10.1143/PTP.89.281 PG 32 WC Physics, Multidisciplinary SC Physics GA KT687 UT WOS:A1993KT68700001 ER PT J AU ANDERSON, CW AF ANDERSON, CW TI EXPRESSION AND PURIFICATION OF THE ADENOVIRUS PROTEINASE POLYPEPTIDE AND OF A SYNTHETIC PROTEINASE SUBSTRATE SO PROTEIN EXPRESSION AND PURIFICATION LA English DT Article ID VIRIONS; TYPE-2 RP ANDERSON, CW (reprint author), BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973, USA. FU NIAID NIH HHS [U01 AI26049] NR 26 TC 34 Z9 34 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 1046-5928 J9 PROTEIN EXPRES PURIF JI Protein Expr. Purif. PD FEB PY 1993 VL 4 IS 1 BP 8 EP 15 DI 10.1006/prep.1993.1002 PG 8 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA KJ886 UT WOS:A1993KJ88600002 PM 8425111 ER PT J AU LASTER, BH THOMLINSON, WC FAIRCHILD, RG AF LASTER, BH THOMLINSON, WC FAIRCHILD, RG TI PHOTON-ACTIVATION OF IODODEOXYURIDINE - BIOLOGICAL EFFICACY OF AUGER ELECTRONS SO RADIATION RESEARCH LA English DT Article ID NEUTRON-CAPTURE THERAPY; MAMMALIAN-CELLS; IUDR RADIOSENSITIZATION; RADIOTOXICITY; ENHANCEMENT; DAMAGE; RETENTION; V79-CELLS; SURVIVAL; ANALOGS C1 UNIV HOSP STONY BROOK,DEPT RADIAT ONCOL,STONY BROOK,NY 11794. RP LASTER, BH (reprint author), BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973, USA. NR 42 TC 45 Z9 46 U1 0 U2 5 PU RADIATION RESEARCH SOC PI OAK BROOK PA 2021 SPRING RD, STE 600, OAK BROOK, IL 60521 SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD FEB PY 1993 VL 133 IS 2 BP 219 EP 224 DI 10.2307/3578359 PG 6 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA KN250 UT WOS:A1993KN25000011 PM 8438063 ER PT J AU LAMMERT, SA AF LAMMERT, SA TI 1993 DIRECTORY OF MASS-SPECTROMETRY MANUFACTURERS AND SUPPLIERS SO RAPID COMMUNICATIONS IN MASS SPECTROMETRY LA English DT Article AB A directory of companies which supply mass spectrometers and mass spectrometry components and services. This directory updates an earlier version. RP LAMMERT, SA (reprint author), OAK RIDGE NATL LAB,MS 6120,POB 2008,OAK RIDGE,TN 37831, USA. NR 2 TC 7 Z9 7 U1 0 U2 0 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0951-4198 J9 RAPID COMMUN MASS SP JI Rapid Commun. Mass Spectrom. PD FEB PY 1993 VL 7 IS 2 BP 112 EP 126 DI 10.1002/rcm.1290070202 PG 15 WC Chemistry, Analytical; Spectroscopy SC Chemistry; Spectroscopy GA KP207 UT WOS:A1993KP20700001 ER PT J AU HOLMES, NC AF HOLMES, NC TI DUAL-BEAM, DOUBLE-PASS ABSORPTION-SPECTROSCOPY OF SHOCKED MATERIALS SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID LIQUID CARBON-DISULFIDE; COMPRESSION; CS2 AB We describe a new method for performing dual-beam, double-pass absorption spectroscopic studies of shocked fluids and solids at ultrahigh pressures. This method can provide high time and spectral resolution of the opacity of shocked materials. It uses a multichannel fiber-optic-coupled system. Two kinds of detectors are used: photomultipliers provide high time resolution in a set of narrow wavelength bands, and a gated, intensified, linear diode-array detector yields a ''snapshot'' spectrum with high resolution. Applications to the study of shock-induced chemical reactions are described. We briefly describe related applications using this method and apparatus. RP HOLMES, NC (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 12 TC 12 Z9 12 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 FEB PY 1993 VL 64 IS 2 BP 357 EP 362 DI 10.1063/1.1144257 PG 6 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA KM799 UT WOS:A1993KM79900011 ER PT J AU SCHURIG, DA KLUNDER, GL SHANNON, MA RUSSO, RE SILVA, RJ AF SCHURIG, DA KLUNDER, GL SHANNON, MA RUSSO, RE SILVA, RJ TI SIGNAL ANALYSIS OF TRANSIENTS IN PULSED PHOTOACOUSTIC-SPECTROSCOPY SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID AQUEOUS-SOLUTION; TEMPERATURE; SPECIATION AB A finite difference model was constructed to describe the origin of the complex transients in pulsed photoacoustic spectroscopy signals. With inclusion of boundary conditions and material interfaces, the model is shown to give qualitative agreement with experimental transients. The model provides insight into the results of varying the photoacoustic-cell materials and/or geometric configuration for cell optimization. The transients are found to contain significant information regarding resonant modes in the photoacoustic cell assembly. The transient signal behavior is explained in terms of these resonant cavity modes, and it is determined which cell cavities are relevant to a given time segment of the signal. Analytical detection limits are correlated with each point on the transient signal. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RI Schurig, David/A-3647-2008 NR 16 TC 13 Z9 13 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 FEB PY 1993 VL 64 IS 2 BP 363 EP 373 DI 10.1063/1.1144258 PG 11 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA KM799 UT WOS:A1993KM79900012 ER PT J AU SUSMAN, S AF SUSMAN, S TI A NEW SAMPLE CELL FOR NEUTRON-SCATTERING AT HIGH AND LOW-TEMPERATURES SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Note AB We describe a simple, inexpensive sample container for neutron scattering at nonambient temperatures. The sample cell works equally well with reactive glasses, crystalline powders, or high vapor pressure liquids. Demonstrated performance has been obtained at temperatures from 10 K to 350-degrees-C. RP SUSMAN, S (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 0 TC 2 Z9 2 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 FEB PY 1993 VL 64 IS 2 BP 587 EP 588 DI 10.1063/1.1144183 PG 2 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA KM799 UT WOS:A1993KM79900050 ER PT J AU STOCK, D AF STOCK, D TI PC-GROUP VERSION 3.02 SO RISK ANALYSIS LA English DT Software Review RP STOCK, D (reprint author), BROOKHAVEN NATL LAB,DIV ENGN TECHNOL,BLDG 130,UPTON,NY 11973, USA. NR 6 TC 0 Z9 0 U1 1 U2 1 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0272-4332 J9 RISK ANAL JI Risk Anal. PD FEB PY 1993 VL 13 IS 1 BP 115 EP 118 DI 10.1111/j.1539-6924.1993.tb00734.x PG 4 WC Public, Environmental & Occupational Health; Mathematics, Interdisciplinary Applications; Social Sciences, Mathematical Methods SC Public, Environmental & Occupational Health; Mathematics; Mathematical Methods In Social Sciences GA KK821 UT WOS:A1993KK82100017 ER PT J AU WHITE, RK BOND, L AF WHITE, RK BOND, L TI HUMAN EXPOSURE ASSESSMENT FOR AIRBORNE POLLUTANTS - ADVANCES AND OPPORTUNITIES - NATL-RES-COUNCIL-COMM-ADV-ASSESSING-HUMAN-EXPOSURE-AIRBORNE-POLLUTANTS-B OARD-ENVIRONM-STUDIES-TOXICOL-COMMISS-GEOSCI-ENVIRONM-RESOURCES SO RISK ANALYSIS LA English DT Book Review RP WHITE, RK (reprint author), OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,RISK ANAL SECT,OAK RIDGE,TN 37831, USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0272-4332 J9 RISK ANAL JI Risk Anal. PD FEB PY 1993 VL 13 IS 1 BP 119 EP 120 PG 2 WC Public, Environmental & Occupational Health; Mathematics, Interdisciplinary Applications; Social Sciences, Mathematical Methods SC Public, Environmental & Occupational Health; Mathematics; Mathematical Methods In Social Sciences GA KK821 UT WOS:A1993KK82100019 ER PT J AU WHITE, RK BOND, L AF WHITE, RK BOND, L TI CHERNOBYL - A POLICY RESPONSE STUDY - SEGERSTAHL,B SO RISK ANALYSIS LA English DT Book Review RP WHITE, RK (reprint author), OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,RISK ANAL SECT,OAK RIDGE,TN 37831, USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0272-4332 J9 RISK ANAL JI Risk Anal. PD FEB PY 1993 VL 13 IS 1 BP 119 EP 119 PG 1 WC Public, Environmental & Occupational Health; Mathematics, Interdisciplinary Applications; Social Sciences, Mathematical Methods SC Public, Environmental & Occupational Health; Mathematics; Mathematical Methods In Social Sciences GA KK821 UT WOS:A1993KK82100018 ER PT J AU WHITE, RK BOND, L AF WHITE, RK BOND, L TI FORECASTING AND MANAGEMENT OF TECHNOLOGY - PORTER,AL, ROPER,AT, MASON,TW, ROSSINI,FA, BANKS,J SO RISK ANALYSIS LA English DT Book Review RP WHITE, RK (reprint author), OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,RISK ANAL SECT,OAK RIDGE,TN 37831, USA. NR 1 TC 0 Z9 0 U1 1 U2 2 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0272-4332 J9 RISK ANAL JI Risk Anal. PD FEB PY 1993 VL 13 IS 1 BP 120 EP 121 PG 2 WC Public, Environmental & Occupational Health; Mathematics, Interdisciplinary Applications; Social Sciences, Mathematical Methods SC Public, Environmental & Occupational Health; Mathematics; Mathematical Methods In Social Sciences GA KK821 UT WOS:A1993KK82100022 ER PT J AU WHITE, RK BOND, L AF WHITE, RK BOND, L TI SYSTEM SAFETY-2000 - A PRACTICAL GUIDE FOR PLANNING, MANAGING, AND CONDUCTING SYSTEM SAFETY PROGRAMS - STEPHENSON,J SO RISK ANALYSIS LA English DT Book Review RP WHITE, RK (reprint author), OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,RISK ANAL SECT,OAK RIDGE,TN 37831, USA. NR 1 TC 0 Z9 0 U1 1 U2 2 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0272-4332 J9 RISK ANAL JI Risk Anal. PD FEB PY 1993 VL 13 IS 1 BP 120 EP 120 PG 1 WC Public, Environmental & Occupational Health; Mathematics, Interdisciplinary Applications; Social Sciences, Mathematical Methods SC Public, Environmental & Occupational Health; Mathematics; Mathematical Methods In Social Sciences GA KK821 UT WOS:A1993KK82100021 ER PT J AU WHITE, RK BOND, L AF WHITE, RK BOND, L TI THE POLITICS OF NUCLEAR-POWER - A HISTORY OF THE SHOREHAM NUCLEAR-POWER-PLANT - MCCAFFREY,DP SO RISK ANALYSIS LA English DT Book Review RP WHITE, RK (reprint author), OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,RISK ANAL SECT,OAK RIDGE,TN 37831, USA. NR 1 TC 0 Z9 0 U1 1 U2 2 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0272-4332 J9 RISK ANAL JI Risk Anal. PD FEB PY 1993 VL 13 IS 1 BP 120 EP 120 PG 1 WC Public, Environmental & Occupational Health; Mathematics, Interdisciplinary Applications; Social Sciences, Mathematical Methods SC Public, Environmental & Occupational Health; Mathematics; Mathematical Methods In Social Sciences GA KK821 UT WOS:A1993KK82100020 ER PT J AU WHITE, RK BOND, L AF WHITE, RK BOND, L TI OZONE IN WATER-TREATMENT - APPLICATION AND ENGINEERING - LANGLAIS,B, RECKHOW,DA, BRINK,DR SO RISK ANALYSIS LA English DT Book Review RP WHITE, RK (reprint author), OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,RISK ANAL SECT,OAK RIDGE,TN 37831, USA. NR 1 TC 2 Z9 2 U1 3 U2 12 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0272-4332 J9 RISK ANAL JI Risk Anal. PD FEB PY 1993 VL 13 IS 1 BP 121 EP 122 PG 2 WC Public, Environmental & Occupational Health; Mathematics, Interdisciplinary Applications; Social Sciences, Mathematical Methods SC Public, Environmental & Occupational Health; Mathematics; Mathematical Methods In Social Sciences GA KK821 UT WOS:A1993KK82100025 ER PT J AU WHITE, RK BOND, L AF WHITE, RK BOND, L TI TECHNOLOGY, LAW, AND THE WORKING ENVIRONMENT - ASHFORD,NA, CALDART,CC SO RISK ANALYSIS LA English DT Book Review RP WHITE, RK (reprint author), OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,RISK ANAL SECT,OAK RIDGE,TN 37831, USA. NR 1 TC 2 Z9 2 U1 3 U2 12 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0272-4332 J9 RISK ANAL JI Risk Anal. PD FEB PY 1993 VL 13 IS 1 BP 121 EP 121 PG 1 WC Public, Environmental & Occupational Health; Mathematics, Interdisciplinary Applications; Social Sciences, Mathematical Methods SC Public, Environmental & Occupational Health; Mathematics; Mathematical Methods In Social Sciences GA KK821 UT WOS:A1993KK82100024 ER PT J AU WHITE, RK BOND, L AF WHITE, RK BOND, L TI A GUIDANCE TO SPSS FOR ANALYSIS OF VARIANCE - LEVINE,G SO RISK ANALYSIS LA English DT Book Review RP WHITE, RK (reprint author), OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,RISK ANAL SECT,OAK RIDGE,TN 37831, USA. NR 1 TC 2 Z9 2 U1 3 U2 12 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0272-4332 J9 RISK ANAL JI Risk Anal. PD FEB PY 1993 VL 13 IS 1 BP 121 EP 121 PG 1 WC Public, Environmental & Occupational Health; Mathematics, Interdisciplinary Applications; Social Sciences, Mathematical Methods SC Public, Environmental & Occupational Health; Mathematics; Mathematical Methods In Social Sciences GA KK821 UT WOS:A1993KK82100023 ER PT J AU RAO, GR FARRELL, K LEE, EH LEWIS, MB MANSUR, LK AF RAO, GR FARRELL, K LEE, EH LEWIS, MB MANSUR, LK TI EFFECTS OF MULTIPLE ION-IMPLANTATION ON CREEP OF FE-13CR-15NI ALLOYS SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article RP RAO, GR (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831, USA. NR 18 TC 2 Z9 2 U1 0 U2 3 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 FEB 1 PY 1993 VL 28 IS 3 BP 287 EP 292 DI 10.1016/0956-716X(93)90429-V PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA KG606 UT WOS:A1993KG60600004 ER PT J AU SCHNEIBEL, JH JENKINS, MG AF SCHNEIBEL, JH JENKINS, MG TI SLOW CRACK-GROWTH AT ROOM-TEMPERATURE IN FEAL SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article ID ENVIRONMENTAL EMBRITTLEMENT; DUCTILITY; FRACTURE; ALLOYS; FE3AL RP SCHNEIBEL, JH (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831, USA. NR 14 TC 24 Z9 24 U1 0 U2 3 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 FEB 1 PY 1993 VL 28 IS 3 BP 389 EP 393 DI 10.1016/0956-716X(93)90447-Z PG 5 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA KG606 UT WOS:A1993KG60600022 ER PT J AU GOLDSTEIN, CI AF GOLDSTEIN, CI TI MULTIGRID METHODS FOR ELLIPTIC PROBLEMS IN UNBOUNDED-DOMAINS SO SIAM JOURNAL ON NUMERICAL ANALYSIS LA English DT Article; Proceedings Paper CT 5TH COPPER MOUNTAIN CONF ON MULTIGRID METHODS CY MAR 31-APR 05, 1991 CL DENVER, CO SP USAF, OFF SCI RES, NATL SCI FDN, IBM DE MULTIGRID METHODS; UNBOUNDED DOMAINS; MESH GRADING ID BOUNDARY-VALUE-PROBLEMS; HELMHOLTZ-EQUATION; NUMERICAL-SOLUTION; ALGORITHMS AB The goal of this work is to study multigrid methods in connection with the numerical solution of elliptic problems in the exterior of a bounded domain. The numerical method consists of approximating the original problem by one on a truncated domain of diameter R and imposing a simple local approximate boundary condition on the outer boundary. The resulting problem is discretized using the finite element method. R must be made sufficiently large to reduce the truncation error (due to the approximate boundary condition) to the level of the discretization error. This results in a very large number of unknowns (increasing like O(R3) in three dimensions), when a quasi-uniform mesh is used. In previous work by the author [Math. Comp., 36 (1981), pp. 387-404], it was shown that optimal error estimates hold with the number of unknowns independent of R using a mesh grading procedure in which the size of the elements are systematically increased as their distance from the origin increases. In the present paper it is shown that the multigrid convergence rate is independent of R using a mesh grading of this kind (with the number of unknowns increasing like log R). It is also shown that the optimal error estimates in [Math Comp., 36 (1981), pp. 387-404] can be extended to datum with unbounded support. On the other hand, the number of multigrid iterations is bounded by O(R2) when a quasi-uniform mesh is used. For three-dimensional problems, the computational cost is bounded by O(R5) using a quasi-uniform mesh and by O(log R) using the graded mesh. The multigrid analysis is formulated and analyzed in a variational framework using weighted Sobolev spaces. RP GOLDSTEIN, CI (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV MATH SCI,UPTON,NY 11973, USA. NR 25 TC 13 Z9 13 U1 0 U2 0 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 SN 0036-1429 J9 SIAM J NUMER ANAL JI SIAM J. Numer. Anal. PD FEB PY 1993 VL 30 IS 1 BP 159 EP 183 DI 10.1137/0730008 PG 25 WC Mathematics, Applied SC Mathematics GA KM976 UT WOS:A1993KM97600008 ER PT J AU NEWSOM, DE BERTRAM, KM AF NEWSOM, DE BERTRAM, KM TI EMERGENCY PREPAREDNESS RESEARCH AT ARGONNE NATIONAL LABORATORY SO SIMULATION LA English DT Article RP NEWSOM, DE (reprint author), ARGONNE NATL LAB,DIV ENVIRONM ASSESSMENT & INFORMAT SCI,ARGONNE,IL 60439, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SIMULATION COUNCILS INC PI SAN DIEGO PA PO BOX 17900, SAN DIEGO, CA 92117 SN 0037-5497 J9 SIMULATION JI Simulation PD FEB PY 1993 VL 60 IS 2 BP 110 EP 110 DI 10.1177/003754979306000205 PG 1 WC Computer Science, Interdisciplinary Applications; Computer Science, Software Engineering SC Computer Science GA KT063 UT WOS:A1993KT06300004 ER PT J AU HUBNER, W FALICOV, LM AF HUBNER, W FALICOV, LM TI NONPERTURBATIVE THEORY OF SPIN-POLARIZED ELECTRON-CAPTURE SPECTROSCOPY IN FERROMAGNETIC NICKEL SO SOLID STATE COMMUNICATIONS LA English DT Article ID SURFACES AB With the purpose of understanding the interaction of nuclear projectiles with ferromagnetic metallic surfaces, Schrodinger's equation is solve along the classical trajectory for head-on collisions of H+ ions with a Ni atom on the femtosecond time scale. Many-body effects are treated exactly within single configurations. Probabilities of (21%) and (0.35%) for one- and two-electron capture and a spin polarization of (- 82%) are found, in good agreement with experiment. The predominant capture of minority electrons, caused by angular-momentum conservation, is strongly enhanced by electron correlation. Electron capture probes magnetism as a phenomenon of correlated electrons on a significantly longer time scale than single-electron properties such as charge transfer. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP HUBNER, W (reprint author), FREE UNIV BERLIN,INST THEORET PHYS,ARNIMALLEE 14,W-1000 BERLIN 33,GERMANY. NR 15 TC 1 Z9 1 U1 0 U2 0 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 FEB PY 1993 VL 85 IS 5 BP 385 EP 388 DI 10.1016/0038-1098(93)90684-F PG 4 WC Physics, Condensed Matter SC Physics GA KM349 UT WOS:A1993KM34900004 ER PT J AU MILJAK, M ZLATIC, V KOS, I THOMPSON, JD CANFIELD, PC FISK, Z AF MILJAK, M ZLATIC, V KOS, I THOMPSON, JD CANFIELD, PC FISK, Z TI TEMPERATURE-DEPENDENT ANISOTROPY OF NORMAL-STATE MAGNETIC-SUSCEPTIBILITY OF METALLIC COPPER OXIDES SO SOLID STATE COMMUNICATIONS LA English DT Article ID O SINGLE-CRYSTALS; TC AB The normal-phase anisotropy of the magnetic susceptibility, DELTA(chi)(T), has been measured for La2-xSrxCu2O4, YBa2Cu3O7-y and Bi2.2Sr1.75Ca1Cu2O8.15 single crystals. A temperature dependent diamagnetic contribution to DELTA(chi)(T) is found below some characteristic temperature, T(dia), in all the metallic samples. The total change, \DELTA(chi)(T(dia)) - DELTA(chi)(T(c))\, is significant and can exceed the room temperature anisotropy quite substantially. The functional form of DELTA(chidia)(T) and the total change between T(dia) and T(c) are found to be rather similar in all the metallic copper oxides. Writing diamagnetic component as, DELTA(chidia)(T) = -C(dia)/(T/THETA(dia) - 1), we find, for La1.9Sr0.1Cu2O4 (T(c) = 16.7 K), THETA(dia) = 15.89 K and C(dia)La = 1.62 x 10(-5) [emu mol-1], while for YBa2Cu3O7 (T(c) = 87.6 K), THETA(dia) = 72.17 K and C(dia)Y = 2.12 x 10(-5) [emu mol-1]. The ratio T(c)/THETA(dia) is roughly the same for both compounds. The normal-phase torque data for high T(c) samples seem to indicate that (i) significant temperature dependent diamagnetism precedes the onset of superconductivity; (ii) the functional form of susceptibility anisotropy exhibits universal features. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP MILJAK, M (reprint author), UNIV ZAGREB,INST PHYS,POB 304,YU-41001 ZAGREB,CROATIA. RI Canfield, Paul/H-2698-2014 NR 12 TC 10 Z9 10 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 FEB PY 1993 VL 85 IS 6 BP 519 EP 523 DI 10.1016/0038-1098(93)90011-B PG 5 WC Physics, Condensed Matter SC Physics GA KM963 UT WOS:A1993KM96300011 ER PT J AU CANKURTARAN, M SAUNDERS, GA BALACHANDRAN, U POEPPEL, RB GORETTA, KC AF CANKURTARAN, M SAUNDERS, GA BALACHANDRAN, U POEPPEL, RB GORETTA, KC TI ULTRASONIC STUDY OF THE ELASTIC PROPERTIES OF YBA2CU4O8 AND THEIR TEMPERATURE AND PRESSURE DEPENDENCES SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY LA English DT Article ID STRUCTURAL PHASE-TRANSITION; SUPERCONDUCTING YBA2CU4O8; YBA2CU3O7-X; MODULUS AB The effects of temperature and hydrostatic pressure have been measured on the velocities of longitudinal and shear 5 MHz ultrasonic waves propagated in ceramic YBa2Cu4O8. The bulk modulus (= 58 GPa) of this high-T(c) superconductor has the same small magnitude as that of YBaCu3O7-x ceramics determined from ultrasonic velocity measurements. With decreasing temperature from 300 K to 12 K the ultrasonic wave velocities increase smoothly but only gradually. Although there is a small increase in gradient near 185 K, the ultrasonic velocities in YBa2Cu4O8 do not show the large step-like changes with pronounced hysteresis in the temperature range 190-235 K, which characterize the elastic behaviour of ceramic YBa2Cu3O7-x. The attenuations of both longitudinal and shear ultrasonic waves in YBa2Cu4O8 do not exhibit relaxation-type peaks. The ultrasonic velocities in YBa2Cu4O8 increase approximately linearly with pressure. The hydrostatic pressure derivatives (partial derivative C(L)/partial derivative P)p=O (=13.9) and (partial derivative mu/partial derivative P)p=O (=0.6) of the elastic stiffnesses and (partial derivative B(S)/partial derivative P)p=O (=13.1) of the bulk modulus obtained for YBa2Cu4O8 are much smaller than those found previously for YBa2Cu3O7-x ceramics. The mean acoustic mode Gruneisen parameter gamma(el) (=1.5) of YBa2Cu4O8 is an order of magnitude smaller than that determined for YBa2Cu3O7-x ceramics from high-pressure ultrasonic studies. The oxygen concentration of YBa2Cu4O8 is stable, in contrast to that of YBa2Cu3O7-x. It is concluded that the differences between the elastic and nonlinear acoustic properties of YBa2Cu4O8 and those of YBa2Cu3O7-x are associated with the absence of oxygen vacancies and therefore of oxygen ordering and migration in YBa2Cu4O8. C1 ARGONNE NATL LAB,DIV MAT & COMPONENTS TECHNOL,ARGONNE,IL 60439. HACETTEPE UNIV,DEPT PHYS,ANKARA 06532,TURKEY. RP CANKURTARAN, M (reprint author), UNIV BATH,SCH PHYS,BATH BA2 7AY,AVON,ENGLAND. NR 24 TC 17 Z9 17 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-2048 J9 SUPERCOND SCI TECH JI Supercond. Sci. Technol. PD FEB PY 1993 VL 6 IS 2 BP 75 EP 80 DI 10.1088/0953-2048/6/2/001 PG 6 WC Physics, Applied; Physics, Condensed Matter SC Physics GA KP339 UT WOS:A1993KP33900001 ER PT J AU TRAN, TT THEVUTHASAN, S KIM, YJ FRIEDMAN, DJ KADUWELA, AP HERMAN, GS FADLEY, CS AF TRAN, TT THEVUTHASAN, S KIM, YJ FRIEDMAN, DJ KADUWELA, AP HERMAN, GS FADLEY, CS TI PHOTOELECTRON DIFFRACTION AND PHOTOELECTRON HOLOGRAPHY STUDY OF A GE(111) HIGH-TEMPERATURE SURFACE PHASE-TRANSITION SO SURFACE SCIENCE LA English DT Article ID SCANNING TUNNELING MICROSCOPY; BULK MELTING TEMPERATURE; GERMANIUM CRYSTAL; ATOMIC-RESOLUTION; ELECTRON-EMISSION; MEDIUM-ENERGY; RANGE ORDER; 111 SURFACE; CORE-LEVEL; SCATTERING AB Further evidence for a reversible high-temperature surface-disordering phase transition at approximately 1060 K on Ge(111) has been found using Ge 3p X-ray photoelectron diffraction (a short-range order probe of surface structure that is sensitive to the first 3-5 spheres of neighbors) and photoelectron holography (a recently suggested direct 3D imaging technique). Azimuthal diffraction data at takeoff angles of theta = 19-degrees (including nearest-neighbor forward-scattering directions and yielding high surface sensitivity) and theta = 55-degrees (for which second-nearest-neighbor forward-scattering directions and more bulk sensitivity are involved) show abrupt drops in intensity of approximately 30%-40% over the temperature interval of 900-1200 K. Photoelectron holographic near-neighbor images at temperatures both below and above the transition region furthermore indicate an identical near-neighbor structure for all atoms present in ordered sites. These combined diffraction and holography data show that by 1200 K, the Ge(111) surface is covered by a completely disordered overlayer of 2.0-2.5 Ge monolayers in thickness. The rate of growth of this overlayer with increasing temperature is also in excellent agreement with recent medium-energy ion scattering results, although the thicknesses we find for the overlayer are 1.5-2.0 times larger. A more detailed analysis of the theta = 19-degrees and the theta = 55-degrees data also suggests the possible presence of a partially disordered interface between the liquid-like overlayer and the bulk, also of 2 Ge monolayers in thickness and consisting of laterally strained domains. C1 UNIV CALIF DAVIS,DAVIS,CA 95616. NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. USN,RES LAB,WASHINGTON,DC 20375. RP TRAN, TT (reprint author), UNIV HAWAII,HONOLULU,HI 96822, USA. OI Kaduwela, Ajith/0000-0002-7236-2698 NR 49 TC 30 Z9 30 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD FEB 1 PY 1993 VL 281 IS 3 BP 270 EP 284 DI 10.1016/0039-6028(93)90640-6 PG 15 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA KK387 UT WOS:A1993KK38700010 ER PT J AU SCHULER, M KOVAR, T LISCHKA, H SHEPARD, R HARRISON, RJ AF SCHULER, M KOVAR, T LISCHKA, H SHEPARD, R HARRISON, RJ TI A PARALLEL IMPLEMENTATION OF THE COLUMBUS MULTIREFERENCE CONFIGURATION-INTERACTION PROGRAM SO THEORETICA CHIMICA ACTA LA English DT Article DE PARALLEL COMPUTING; MULTIREFERENCE CI; COLUMBUS PROGRAM SYSTEM ID LINEAR ALGEBRA SUBPROGRAMS; REFERENCE STATE FUNCTIONS; ELECTRON PAIRS METHOD; QUANTUM-CHEMISTRY; COMPUTERS; SET AB In this work a parallel implementation of the COLUMBUS MRSDCI program system is presented. A coarse grain parallelization approach using message passing via the portable toolkit TCGMSG is used. The program is very well portable and runs on shared memory machines like the Cray Y-MP, Alliant FX/2800 or Convex C2 and on distributed memory machines like the iPSC/860. Further implementations on a network of workstations and on the Intel Touchstone Delta are in progress. Overall, results are quite satisfactory considering the complexity and the prodigious requirements, especially the I/O bandwidth, of MRCI programs in general. For our largest test case we obtain a speedup of a factor of 7.2 on an eight processor Cray Y-MP for that section of the program (hamiltonian matrix times trial vector product) which has been parallelized. The speedup for one complete diagonalization iteration amounts to 5.9. An absolute speed close to 1 GFLOPS is found. Results for the iPSC/860 show that ordinary disk I/0 is certainly not sufficient in order to guarantee a satisfactory performance. As a solution for that problem, the implementation of a fully asynchronous distributed-memory model for certain data files is in preparation. C1 ARGONNE NATL LAB, DIV CHEM, THEORET CHEM GRP, ARGONNE, IL 60439 USA. RP SCHULER, M (reprint author), UNIV VIENNA, INST THEORET CHEM & STRAHLENCHEM, WAHRINGER STR 17, A-1090 VIENNA, AUSTRIA. RI Lischka, Hans/A-8802-2015 NR 42 TC 35 Z9 35 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0040-5744 J9 THEOR CHIM ACTA JI Theor. Chim. Acta PD FEB PY 1993 VL 84 IS 6 BP 489 EP 509 DI 10.1007/BF01126612 PG 21 WC Chemistry, Physical SC Chemistry GA KN173 UT WOS:A1993KN17300002 ER PT J AU EVANS, RW MANNINEN, DL DONG, FB MCLYNNE, DA AF EVANS, RW MANNINEN, DL DONG, FB MCLYNNE, DA TI IS RETRANSPLANTATION COST-EFFECTIVE SO TRANSPLANTATION PROCEEDINGS LA English DT Article; Proceedings Paper CT JEAN HAMBURGER MEMORIAL CONGRESS / 14TH INTERNATIONAL CONGRESS OF THE TRANSPLANTATION SOC CY AUG 16-21, 1992 CL PARIS, FRANCE SP TRANSPLANTAT SOC ID HEALTH-CARE TECHNOLOGY; RESOURCE-ALLOCATION; RATIONING DECISIONS; CYCLOSPORINE ERA; TRANSPLANTATION; INEVITABILITY; OREGON C1 BATTELLE SEATTLE RES CTR,SEATTLE,WA. RP EVANS, RW (reprint author), MAYO CLIN & MAYO FDN,DEPT HLTH SCI RES,HLTH SERV EVALUAT SECT,ROCHESTER,MN 55905, USA. RI Embrett, Mark/H-4466-2014 OI Embrett, Mark/0000-0002-3969-0219 NR 29 TC 56 Z9 56 U1 1 U2 1 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 FEB PY 1993 VL 25 IS 1 BP 1694 EP 1696 PN 2 PG 3 WC Immunology; Surgery; Transplantation SC Immunology; Surgery; Transplantation GA KN622 UT WOS:A1993KN62200349 PM 8442240 ER PT J AU DEININGER, PL BATZER, MA HUTCHINSON, CA EDGELL, MH AF DEININGER, PL BATZER, MA HUTCHINSON, CA EDGELL, MH TI THE GENERATION OF SEQUENCE SIMILARITY IN SINES AND LINES - REPLY SO TRENDS IN GENETICS LA English DT Letter ID EVOLUTION C1 LAWRENCE LIVERMORE NATL LAB,DIV BIOMED SCI,CTR HUMAN GENOME,LIVERMORE,CA 94550. UNIV N CAROLINA,DEPT MICROBIOL,CHAPEL HILL,NC 27599. RP DEININGER, PL (reprint author), LOUISIANA STATE UNIV,MED CTR,DEPT BIOCHEM & MOLEC BIOL,NEW ORLEANS,LA 70112, USA. OI Deininger, Prescott/0000-0002-1067-3028 NR 3 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0168-9525 J9 TRENDS GENET JI Trends Genet. PD FEB PY 1993 VL 9 IS 2 BP 38 EP 39 DI 10.1016/0168-9525(93)90173-F PG 2 WC Genetics & Heredity SC Genetics & Heredity GA KK894 UT WOS:A1993KK89400003 ER PT J AU THOMAS, G AF THOMAS, G TI ELECTRON-MICROSCOPY OF ADVANCED MAGNETS SO ULTRAMICROSCOPY LA English DT Article ID FILMS AB Conventional and HR electron microscopy of the microstructures of sintered, mechanically alloyed and melt-spun rare-earth metal-transition metal magnets are given as well as the atomic and magnetic structure of thin-film media. C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,NATL CTR ELECTRON MICROSCOPY,BERKELEY,CA 94720. RP THOMAS, G (reprint author), UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720, USA. NR 15 TC 0 Z9 0 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-3991 J9 ULTRAMICROSCOPY JI Ultramicroscopy PD FEB PY 1993 VL 49 IS 1-4 BP 286 EP 292 DI 10.1016/0304-3991(93)90235-P PG 7 WC Microscopy SC Microscopy GA KV567 UT WOS:A1993KV56700030 ER PT J AU BRANNAN, JR HASELOW, JS AF BRANNAN, JR HASELOW, JS TI COMPOUND RANDOM FIELD MODELS OF MULTIPLE SCALE HYDRAULIC CONDUCTIVITY SO WATER RESOURCES RESEARCH LA English DT Article ID STEADY GROUNDWATER-FLOW; STOCHASTIC IDENTIFICATION; DIGITAL-SIMULATION; EFFECTIVE RECHARGE; TRANSMISSIVITY; MEDIA AB Enormous amounts of hydrologic data are required to accurately simulate subsurface contaminant transport. Effectively supplementing measurements of hydrologic parameters such as permeability and porosity with ''soft'' information obtained from the interpretation of geologic cores and geophysical logs can improve the simulation of contaminant transport while reducing the measured data that are required. A method is presented herein for generating hydraulic conductivity fields comprised of several geological materials with hydraulic conductivities that can range over several orders of magnitude. This method utilizes indicator fields that are designed to allow random variation at the megascopic scale but are constrained by observations inferred from geophysical logs and geologic core data, The statistical description of random hydraulic conductivity values of distinct geological materials at the macroscopic scale may be obtained by conventional parameter estimation techniques. The combined approach can then be used to generate realizations of a hydraulic conductivity field for subsequent use in flow and transport simulations. The structural constraints confine realizations to vary about a nominal model in a physically reasonable manner. The uncertainty may be viewed as arising from two different scales. Variation in hydraulic conductivity at the macroscale may be viewed as an intrinsic statistical property of the particular geologic material but where measurements may be made in order to ascertain the statistical description. On the other hand, uncertainty at the megascale level arises from the fact that the large-scale system structure is only partially observable. It is the latter area where soft geologic information and geological knowledge can be useful in confining the uncertainty in the model to geologically reasonable limits. C1 SAVANNAH RIVER ECOL LAB,ENVIRONM SCI SECT,AIKEN,SC 29808. RP BRANNAN, JR (reprint author), CLEMSON UNIV,DEPT MATH SCI,CLEMSON,SC 29634, USA. NR 19 TC 8 Z9 8 U1 0 U2 0 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 FEB PY 1993 VL 29 IS 2 BP 365 EP 372 DI 10.1029/92WR02373 PG 8 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA KM520 UT WOS:A1993KM52000013 ER PT J AU LEAP, DI KAPLAN, PG AF LEAP, DI KAPLAN, PG TI A SINGLE-WELL TRACING METHOD FOR ESTIMATING REGIONAL ADVECTIVE VELOCITY IN A CONFINED AQUIFER - THEORY AND PRELIMINARY LABORATORY VERIFICATION - REPLY SO WATER RESOURCES RESEARCH LA English DT Note C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP LEAP, DI (reprint author), PURDUE UNIV,DEPT EARTH & ATMOSPHER SCI,W LAFAYETTE,IN 47907, USA. NR 3 TC 1 Z9 1 U1 1 U2 1 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 FEB PY 1993 VL 29 IS 2 BP 545 EP 546 DI 10.1029/92WR02417 PG 2 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA KM520 UT WOS:A1993KM52000033 ER PT J AU DRUMHELLER, DS AF DRUMHELLER, DS TI TIME-DOMAIN COMPUTATIONS OF ONE-DIMENSIONAL ELASTIC-WAVES IN LIQUIDS, SOLIDS AND FERROELECTRIC CERAMICS SO WAVE MOTION LA English DT Article AB Computational solutions of linear-elastic wave equations are usually executed with frequency-domain algorithms; however, time-domain methods offer significant advantages in speed and simplicity. In this work, a time-domain algorithm is developed for one-dimensional problems in rectangular, cylindrical, and spherical coordinates. The result is simultaneously a finite-difference and method-of-characteristics algorithm. For most materials, the algorithm is explicit - for a given time, the solution at a particular position depends only upon solutions at earlier times. The exceptions are the ferroelectric ceramics which are an important class of electromechanical transducers. For these materials, the algorithm is implicit - for a given time, the solution at a particular position within the ceramic depends not only upon solutions at earlier times but also upon the current solutions at all other positions within the ceramic. Application of the algorithm is demonstrated for a variety of problems. Solutions are compared to the conventional finite-difference method, the conventional method of characteristics, and the Laplace transform method. Practical applications include the analysis of a lithotripter tool for fragmenting human kidney stones, and an acoustic logging tool for measuring the diameter and thickness of well casing. RP DRUMHELLER, DS (reprint author), SANDIA NATL LABS,GEOTHERMAL RES DEPT,ALBUQUERQUE,NM 87185, USA. NR 11 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0165-2125 J9 WAVE MOTION JI Wave Motion PD FEB PY 1993 VL 17 IS 1 BP 63 EP 88 DI 10.1016/0165-2125(93)90089-X PG 26 WC Acoustics; Mechanics; Physics, Multidisciplinary SC Acoustics; Mechanics; Physics GA KM085 UT WOS:A1993KM08500005 ER PT J AU MORRISON, CT ROUTBORT, JL SCATTERGOOD, RO WARREN, R AF MORRISON, CT ROUTBORT, JL SCATTERGOOD, RO WARREN, R TI EROSION OF AN ALIGNED ALUMINA STAINLESS-STEEL COMPOSITE SO WEAR LA English DT Article AB Steady-state erosion of a fully aligned composite consisting of a regular array of alumina rods embedded into a 304 stainless steel matrix has been investigated at room temperature using alumina erodents whose mean diameters varied from 37 to 390 mum. Impact angles varied between 15-degrees and 90-degrees with velocities in the range of 60-100 m s-1. All experiments were performed with the axis of the alumina rods perpendicular to the erosion surface. Experiments under identical conditions were performed on bulk samples of 304 stainless steel and on the same type of alumina. The composite results can be described, to a reasonable approximation, using a model whose basis is that constrained steady-state erosion occurs such that the bulk stainless steel erosion rate determines the form of a stationary erosion-surface profile. The physical basis of the constraints are discussed in terms of the erosion mechanisms. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. N CAROLINA STATE UNIV,DEPT MAT SCI & ENGN,RALEIGH,NC 27695. CHALMERS UNIV TECHNOL,DEPT ENGN MAT,S-40220 GOTHENBURG,SWEDEN. RI Scattergood, Ronald/D-5204-2009 NR 9 TC 10 Z9 10 U1 0 U2 1 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0043-1648 J9 WEAR JI Wear PD FEB 1 PY 1993 VL 160 IS 2 BP 345 EP 350 DI 10.1016/0043-1648(93)90439-S PG 6 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA KN640 UT WOS:A1993KN64000018 ER PT J AU JONES, BK EMERY, AF MARBURGER, SJ AF JONES, BK EMERY, AF MARBURGER, SJ TI AN ANALYTICAL AND EXPERIMENTAL-STUDY OF THE EFFECTS OF WELDING PARAMETERS ON FUSION WELDS SO WELDING JOURNAL LA English DT Article DE FUSION WELDING; WELDING PARAMETERS; WELDING PROCEDURES; DEFORMATION; RESIDUAL STRESSES; CIRCULAR WELDS; THIN PLATE; MODELING; HEAT SINKING; PREHEATING ID RESIDUAL-STRESSES; PIPE AB A major concern in welding structures is the determination of a proper welding procedure, i.e., travel speed, power and preheat, in the presence of external mechanical constraints or constraints self-induced by the structure's shape. This paper discusses a study to characterize the effects of certain parameters upon the deformations and residual stresses produced by circular welds on a thin plate. In this work, relatively simple modeling assumptions are used to gain insight into the behavior of welded structures. The temperatures, distortions and residual stresses predicted by the models are verified by comparison to baseline experiments. The models are then used to explore the effects that factors such as heat sinking, preheating and geometry have on the deformations and residual stresses in the workpiece. C1 SANDIA NATL LABS,DIV PROC DEV & FABRICAT,ALBUQUERQUE,NM 87185. RP JONES, BK (reprint author), UNIV WASHINGTON,DEPT MECH ENGN,SEATTLE,WA 98195, USA. NR 20 TC 4 Z9 4 U1 0 U2 1 PU AMER WELDING SOC PI MIAMI PA PO BOX 351040, MIAMI, FL 33135 SN 0043-2296 J9 WELD J JI Weld. J. PD FEB PY 1993 VL 72 IS 2 BP S51 EP S59 PG 9 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA KL389 UT WOS:A1993KL38900016 ER PT J AU TANAKA, T GOKCEN, NA SPENCER, PJ MORITA, ZI IIDA, T AF TANAKA, T GOKCEN, NA SPENCER, PJ MORITA, ZI IIDA, T TI EVALUATION OF INTERACTION PARAMETERS IN DILUTE LIQUID TERNARY ALLOYS BY A SOLUTION MODEL BASED ON THE FREE-VOLUME THEORY SO ZEITSCHRIFT FUR METALLKUNDE LA English DT Article ID BINARY-ALLOYS; EXCESS ENTROPY; ENTHALPY AB A solution model based on the free volume theory has been applied to derive a Gibbs energy interaction parameter epsilon(B)C. The relation between an enthalpy interaction parameter eta(B)C an entropy interaction parameter sigma(B)C has been obtained. These parameters were evaluated from some physical properties coupled with Miedema's semi-empirical method. C1 US BUR MINES,ALBANY RES CTR,ALBANY,OR 97321. RHEIN WESTFAL TH AACHEN,LEHRSTUHL THEORET HUTTENKUNDE & MET KERNBRENNSTOFFE,W-5100 AACHEN,GERMANY. RP TANAKA, T (reprint author), OSAKA UNIV,FAC ENGN,DEPT MAT SCI & PROC,2-1 YAMADAOKA,SUITA,OSAKA 565,JAPAN. NR 22 TC 21 Z9 21 U1 0 U2 1 PU CARL HANSER VERLAG PI MUNICH PA KOLBERGERSTRASSE 22, POSTFACH 860420, W-8163 MUNICH, GERMANY SN 0044-3093 J9 Z METALLKD JI Z. Metallk. PD FEB PY 1993 VL 84 IS 2 BP 100 EP 105 PG 6 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA KT772 UT WOS:A1993KT77200005 ER PT J AU MCNEILL, JH CHISHTI, AA DALY, PJ GELLETLY, W HOTCHKIS, MAC PIIPARINEN, M VARLEY, BJ WOODS, PJ BLOMQVIST, J AF MCNEILL, JH CHISHTI, AA DALY, PJ GELLETLY, W HOTCHKIS, MAC PIIPARINEN, M VARLEY, BJ WOODS, PJ BLOMQVIST, J TI ISOMERIC DECAY STUDIES USING A RECOIL MASS SEPARATOR - EXOTIC N = 82 AND 83 NUCLEI YB-153, LU-153, LU-154 AND HF-154 SO ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI LA English DT Article ID LEVEL STRUCTURE; N=83 NUCLEI; BETA-DECAY; OCTUPOLE EXCITATIONS; SENIORITY ISOMERISM; YRAST STATES; PROTON; IDENTIFICATION; ER-150(68)82; GD-146 AB Microsecond isomers in the exotic proton-rich N = 82, 83 nuclei 153Yb, 153Lu, 154Lu and 154Hf have been identified by gamma-ray spectroscopy following mass analysis of 102Pd + 245 MeV 54Fe reaction products using the Daresbury Recoil Separator. The decays of the isomers, interpreted as pih11/2n and pih11/2n nuf7/2 states, are characterized. The reduced E2 transition rates indicate that half-filling of the pih11/2 subshell occurs just below Z = 71, and results for the N = 83 odd-odd isotones are also consistent with this finding. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. JOINT INST HEAVY ION RES,OAK RIDGE,TN 37831. PURDUE UNIV,DEPT CHEM,W LAFAYETTE,IN 47907. SERC,DARESBURY LAB,WARRINGTON WA4 4AD,CHESHIRE,ENGLAND. JYVASKYLA UNIV,DEPT PHYS,SF-40100 JYVASKYLA,FINLAND. UNIV EDINBURGH,DEPT PHYS,EDINBURGH EH9 3JZ,MIDLOTHIAN,SCOTLAND. MANNE SEIGBAHN INST PHYS,S-10405 STOCKHOLM,SWEDEN. RP MCNEILL, JH (reprint author), UNIV MANCHESTER,DEPT PHYS,MANCHESTER M13 9PL,LANCS,ENGLAND. NR 36 TC 13 Z9 13 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 FEB PY 1993 VL 344 IS 4 BP 369 EP 379 DI 10.1007/BF01283192 PG 11 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA KM301 UT WOS:A1993KM30100003 ER PT J AU BUSSMANNHOLDER, A BISHOP, AR SIMON, A AF BUSSMANNHOLDER, A BISHOP, AR SIMON, A TI ENHANCEMENT OF TC IN BCS THEORY EXTENDED BY INTERBAND 2-PHONON EXCHANGE SO ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTIVITY; FERROELECTRICITY; OXIDES; MODEL AB Band crossing and hybridization effects on superconductivity are investigated within a weak coupling limit of an extended BCS theory. Two-phonon modiated attractive two-band (p - d) interactions induce anisotropic coupled energy gaps, enhancement of the transition temperature T(c), and a material-dependent isotope effect. The individual gap to k(B)T(c) ratios deviate from the usual BCS value but their average recovers approximately the usual value. Effects on ultrasonic attenuation and coherence lengths are briefly discussed. C1 LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. RP BUSSMANNHOLDER, A (reprint author), MAX PLANCK INST FESTKORPERFORSCH, HEISENBERGSTR 1, W-7000 STUTTGART 80, GERMANY. NR 44 TC 14 Z9 14 U1 1 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 FEB PY 1993 VL 90 IS 2 BP 183 EP 186 DI 10.1007/BF02198152 PG 4 WC Physics, Condensed Matter SC Physics GA KJ036 UT WOS:A1993KJ03600008 ER PT J AU ABREU, P ADAM, W ADYE, T AGASI, E ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV 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, R CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHAVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J 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 EEK, LO EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S 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 GOLOB, B 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 GUMENYUK, S GUY, J HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL 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 HUET, K HULTH, PO HULTQVIST, K 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 KARVELAS, E 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 KORCYL, K KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U KRUPINSKI, W KULKA, K 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 LESIAK, T LEVY, JM LIEB, E LIKO, D LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D 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 MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MURYN, B MYATT, G NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PASSERI, A PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PETROVYKH, L PETTERSEN, TE PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H 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, S ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHULZE, B SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, 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 TORASSA, E TORTORA, L TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M 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 VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M 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 WITEK, 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 ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J AF ABREU, P ADAM, W ADYE, T AGASI, E ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV 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, R CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHAVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J 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 EEK, LO EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S 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 GOLOB, B 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 GUMENYUK, S GUY, J HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL 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 HUET, K HULTH, PO HULTQVIST, K 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 KARVELAS, E 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 KORCYL, K KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U KRUPINSKI, W KULKA, K 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 LESIAK, T LEVY, JM LIEB, E LIKO, D LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D 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 MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MURYN, B MYATT, G NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PASSERI, A PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PETROVYKH, L PETTERSEN, TE PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H 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, S ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHULZE, B SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, 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 TORASSA, E TORTORA, L TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M 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 VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M 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 WITEK, 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 ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J TI A MEASUREMENT OF B-MESON PRODUCTION AND LIFETIME USING DL- EVENTS IN Z(0) DECAYS SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID HEAVY FLAVOR PRODUCTION; LUND MONTE-CARLO; E+E ANNIHILATION; JET FRAGMENTATION; CHARMED MESONS; PHYSICS AB A study of B meson decays into D l- X final states is presented. In these events, neutral and charged D mesons originate predominantly from B+ and B0 decays, respectively. The dilution of this correlation due to D** production has been taken into account. From 263700 hadronic Z0 decays collected in 1991 with the DELPHI detector at the LEP collider, 92 D0 --> K- pi+, 35 D+ --> K- pi+ pi+ and 61 D*+ --> D0 pi+ followed by D0 --> K- pi+ or D0 --> K- pi+ pi+ pi-, are found with an associated lepton of the same charge as the kaon. From the D0 l- and D*+ l-, the probability f(d) that a b quark hadronizes into a B- (or B0BAR),meson is found to be 0.44 +/-0.08 +/-0.09, corresponding to a total (B(s) + LAMBDA(b)) hadronization fraction of 0.12(-0.12)+0.24 .By reconstructing the energy of each B meson, the b quark fragmentation is directly measured for the first time. The mean value of the B meson energy fraction is: [X(E)(B)] = 0.695+/-0.015(stat.)+/-0.029(syst.) Reconstructing D-lepton vertices, the following B life-times are measured: tau(B) = 1.27(-0.18)+0.22(stat.)+/-0.15(syst.) ps, where bBAR --> D0 l- X, tau(B) = 1.18(-0.27)+0.39(stat.)+/-0.15(syst.) ps, where BBAR --> D+ l- X, T(B) = 1.19(-0.19)+0.25(stat.)+/-0.15(syst.) ps where BBAR --> D*+ l- X, and an average tau(B) = 1.23(-0.13)+0.14(stat.)+/-0.15(syst.) ps is found. Allowing for decays into D** l- vBAR, the B+ and B0 lifetimes are: tau(B+)= 1.30(0.29)+0.33(stat.)+/-0.15(syst. exp.) +/-0.05(syst. D**) ps, tau(B0)= 1.17(-0.23)+0.29(stat.)+/-0.15(syst. exp.) +/-0.05 (syst. D**) ps, tau(B+)/tau(B0) = 1.11(0.39)+0.51(stat.)+/-0.05(syst. exp.) +/-0.10(syst. D**) ps. C1 UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE. UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY. UNIV BOLOGNA,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY. INFN,I-40126 BOLOGNA,ITALY. CERN,CH-1211 GENEVA 23,SWITZERLAND. COLL FRANCE,CNRS,IN2P3,PHYS CORPUSCULAIRE LAB,F-75231 PARIS 05,FRANCE. ULP,CNRS,IN2P3,CTR RECH NUCL,BP 20,F-67037 STRASBOURG,FRANCE. NCSR DEMOKRITOS,INST NUCL PHYS,GR-15310 ATHENS,GREECE. FZU,CAS,DIV HIGH ENERGY PHYS,INST PHYS,CS-18040 PRAGUE 8,CZECHOSLOVAKIA. INFN,I-16146 GENOA,ITALY. UNIV GRENOBLE 1,CNRS,IN2P3,INST SCI NUCL,F-38026 GRENOBLE,FRANCE. JOINT NUCL RES INST,MOSCOW 101000,RUSSIA. INST NUCL PHYS,HIGH ENERGY PHYS LAB,PL-30055 KRAKOW 30,POLAND. CTR BRASILEIRO PESQUISAS FIS,BR-22290 RIO JANEIRO,BRAZIL. UNIV PARIS 11,CNRS,IN2P3,ACCELERATEUR LINEAIRE LAB,F-91405 ORSAY,FRANCE. UNIV LANCASTER,SCH PHYS & MAT,LANCASTER LA1 4YB,ENGLAND. FOUL,IST,LIP,P-1000 LISBON,PORTUGAL. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,ENGLAND. UNIV PARIS 06 & 07,CNRS,IN2P3,LPNHE,F-75230 PARIS 05,FRANCE. UNIV LUND,DEPT PHYS,S-22363 LUND,SWEDEN. UNIV LYON 1,CNRS,IN2P3,IPNL,F-69622 VILLEURBANNE,FRANCE. UNIV COMPLUTENSE,E-28040 MADRID,SPAIN. UNIV AIX MARSEILLE 2,CNRS,IN2P3,CPP,F-13288 MARSEILLE 09,FRANCE. INFN,I-20133 MILAN,ITALY. UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY. NIELS BOHR INST,DK-2100 COPENHAGEN 0,DENMARK. CHARLES UNIV,NUCL CTR MFF,NC,CS-18000 PRAGUE 8,CZECHOSLOVAKIA. 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. INFN,I-35131 PADUA,ITALY. PONTIFICIA UNIV CATOLICA,DEPT FIS,BR-22453 RIO JANEIRO,BRAZIL. UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV ROME 2,DIPARTIMENTO FIS,I-00173 ROME,ITALY. DAPNIA,DSM,CTR ETUDE SACLAY,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. INFN,I-00173 ROME,ITALY. HIGH ENERGY PHYS INST,PROTVINO,RUSSIA. INST JOZEF STEFAN,LJUBLJANA,SLOVENIA. UNIV STOCKHOLM,INST PHYS,S-11346 STOCKHOLM,SWEDEN. INFN,I-10125 TURIN,ITALY. INFN,I-34127 TRIESTE,ITALY. UNIV TRIESTE,DIPARTIMENTO FIS,I-34127 TRIESTE,ITALY. UNIV UDINE,IST FIS,I-33100 UDINE,ITALY. UNIV UPPSALA,DEPT RADIAT SCI,S-75121 UPPSALA,SWEDEN. U VALENCIA,DFAMN,E-46100 BURJASSOT,SPAIN. IFIC,VALENCIA,SPAIN. OSTERR AKAD WISSENSCH,INST HOCHENERGIEPHYS,A-1050 VIENNA,AUSTRIA. INST NUCL STUDIES,PL-00681 WARSAW,POLAND. CSIC,VALENCIA,SPAIN. UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,W-5600 WUPPERTAL 1,GERMANY. UNIV WARSAW,PL-00681 WARSAW,POLAND. UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM. ULB,VUB,IIHE,B-1005 BRUSSELS,BELGIUM. SEFT,HIGH ENERGY PHYS RES INST,SF-00170 HELSINKI,FINLAND. UNIV KARLSRUHE,INST EXPTL KERNPHYS,W-7500 KARLSRUHE,GERMANY. RP ABREU, P (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. RI Andreazza, Attilio/E-5642-2011; Dracos, Marcos/K-2335-2012; 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; Schulze, Bruno/B-7599-2008; Petrolini, Alessandro/H-3782-2011; Torassa, Ezio/I-1788-2012; Giacomelli, Paolo/B-8076-2009; Fruhwirth, Rudolf/H-2529-2012; Hallgren, Allan/A-8963-2013; Botner, Olga/A-9110-2013; Zalewski, Piotr/H-7335-2013; Marti-Garcia, Salvador/F-3085-2011; Vaz, Pedro/K-2464-2013; Monge, Maria Roberta/G-9127-2012; Ridky, Jan/H-6184-2014; Zukanovich Funchal, Renata/C-5829-2013; Fernandez, Ester/K-9734-2014; 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; 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; Barrio, Juan/L-3227-2014; Zaitsev, Alexandre/B-8989-2017; OI Andreazza, Attilio/0000-0001-5161-5759; Dracos, Marcos/0000-0003-0514-193X; Ruiz, Alberto/0000-0002-3639-0368; Shellard, Ronald/0000-0002-2983-1815; Schulze, Bruno/0000-0002-3325-5785; Petrolini, Alessandro/0000-0003-0222-7594; 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; 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; Barrio, Juan/0000-0002-0965-0259; 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; Sannino, Mario/0000-0001-7700-8383; De Angelis, Alessandro/0000-0002-3288-2517; De Lotto, Barbara/0000-0003-3624-4480; Tabarelli de Fatis, Tommaso/0000-0001-6262-4685; Lacasta, Carlos/0000-0002-2623-6252; Torassa, Ezio/0000-0003-2321-0599 NR 29 TC 35 Z9 35 U1 0 U2 8 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 FEB PY 1993 VL 57 IS 2 BP 181 EP 195 PG 15 WC Physics, Particles & Fields SC Physics GA KM303 UT WOS:A1993KM30300001 ER PT J AU ADRIANI, O AGUILARBENITEZ, M AHLEN, S ALCARAZ, J ALOISIO, A ALVERSON, G ALVIGGI, MG AMBROSI, G AN, Q ANDERHUB, H ANDERSON, AL ANDREEV, VP ANTONOV, L ANTREASYAN, D ARCE, P AREFIEV, A ATAMANCHUK, A AZEMOON, T AZIZ, T BABA, PVKS BAGNAIA, P BAKKEN, JA BAKSAY, L BALL, RC BANERJEE, S BAO, J BARILLERE, R BARONE, L BASCHIROTTO, A BATTISTON, R BAY, A BECATTINI, F BECKER, U BEHNER, F BEHRENS, J BENCZE, GL BERDUGO, J BERGES, P BERTUCCI, B BETEV, BL BIASINI, M BILAND, A BILEI, GM BIZZARRI, R BLAISING, JJ BOBBINK, GJ BOCK, R BOHM, A BORGIA, B BOSETI, M BOURILKOV, D BOURQUIN, M BOUTIGNY, D BOUWENS, B BRAMBILLA, E BRANSON, JG BROCK, IC BROOKS, M BUJAK, A BURGER, JD BURGER, WJ BUSENITZ, J CAI, XD CAPELL, M CARIA, M CARLINO, G CARTACCI, AM CASTELLO, R CERRADA, M CESARONI, F CHANG, YH CHATURVEDI, UK CHEMARIN, M CHEN, A CHEN, C CHEN, GM CHEN, HF CHEN, HS CHEN, M CHEN, WY CHIEFARI, G CHIEN, CY CHOI, MT CHUNG, S CIVININI, C CLARE, I CLARE, R COAN, TE COHN, HO COIGNET, G COLINO, N CONTIN, A CUI, XT CUI, XY DAI, TS DALESSANDRO, R DEASMUNDIS, R DEGRE, A DEITERS, K DENES, E DENES, P DENOTARISTEFANI, F DHINA, M DIBITONTO, D DIEMOZ, M DIMITROV, HR DIONISI, C DJAMBAZOV, L DOVA, MT DRAGO, E DRIEVER, T DUCHESNEAU, D DUINKER, P DURAN, I EASO, S ELMAMOUNI, H ENGLER, A EPPLING, FJ ERNE, FC EXTERMANN, P FABBRETTI, R FABRE, M FALCIANO, S FAN, SJ FACKLER, O FAY, J FELCINI, M FERGUSON, T FERNANDEZ, D FERNANDEZ, G FERRONI, F FESEFELDT, H FIANDRINI, E FIELD, J FILTHAUT, F FINOCCHIARO, G FISHER, PH FORCONI, G FOREMAN, T FREUDENREICH, K FRIEBEL, W FUKUSHIMA, M GAILLOUD, M GALAKTIONOV, Y GALLO, E GANGULI, SN GARCIAABIA, P GELE, D GENTILE, S GOLDFARB, S GONG, ZF GONZALEZ, E GOUGAS, A GOUJON, D GRATTA, G GRUENEWALD, M GU, C GUANZIROLI, M GUO, JK GUPTA, VK GURTU, A GUSTAFSON, HR GUTAY, LJ HANGARTER, K HASAN, A HAUSCHILDT, D HE, CF HE, JT HEBBEKER, T HEBER, M HERTEN, C HERVE, A HILGERS, K HOFER, H HOORANI, H HU, G HU, GQ ILLE, B ILYAS, MM INNOCENTE, V JANSSEN, H JEZEQUEL, S JIN, BN KASSER, A KHAN, RA KAMYSHKOV, Y KAPINOS, P KAPUSTINSKY, JS KARYOTAKIS, Y KAUR, M KHOKHAR, S KIENZLEFOCACCI, MN KIM, JK KIM, SC KIM, YG KINNISON, WW KIRKBY, D KIRSCH, S KITTEL, W KLIMENTOV, A KONIG, AC KOFFEMAN, E KORNADT, O KOUTSENKO, V KOULBARDIS, A KRAEMER, RW KRAMER, T KRASTEV, VR KRENZ, W KRIVSHICH, A KUIJTEN, H KUMAR, KS KUNIN, A LANDI, G LANSKE, D LANZANO, S LEBRUN, P LECOMTE, P LECOQ, P LECOULTRE, P LEE, DM LEEDOM, I LEGGETT, C LEGOFF, JM LEISTE, R LENTI, M LEONARDI, E LEYTENS, X LI, C LI, HT LI, PJ LIAO, JY LIN, WT LIN, ZY LINDE, FL LINDEMANN, B LISTA, L LIU, Y LOHMANN, W LONGO, E LU, YS LUBBERS, JM LUBELSMEYER, K LUCI, C LUCKEY, D LUDOVICI, L LUMINARI, L LUSTERMANN, W MA, JM MA, WG MACDERMOTT, M MALHOTRA, PK MALIK, R MALININ, A MANA, C MAOLINBAY, M MARCHESINI, P MARION, F MARIN, A MARTIN, JP MARTINEZLASO, L MARZANO, F MASSARO, GGG MAZUMDAR, K MCBRIDE, P MCMAHON, T MCNALLY, D MERK, M MEROLA, L MESCHINI, M METZGER, WJ MI, Y MILLS, GB MIR, Y MIRABELLI, G MNICH, J MOLLER, M MONTELEONI, B MORAND, R MORGANTI, S MOULAI, NE MOUNT, R MULLER, S NADTOCHY, A NAGY, E NAPOLITANO, M NEWMAN, H NEYER, C NIAZ, MA NIPPE, A NOWAK, H ORGANTINI, G PANDOULAS, D PAOLETTI, S PAOLUCCI, P PASCALA, G PASSALEVA, G PATRICELLI, S PAUL, T PAULUZZI, M PAUS, C PAUSS, F PEI, YJ PENSOTTI, S PERRETGALLIX, D PERRIER, J PEVSNER, A PICCOLO, D PIERI, M PITOUE, PA PLASIL, F PLYASKIN, V POHL, M POJIDAEV, V POSTEMA, H QI, ZD QIAN, JM QURESHI, KN RAGHAVAN, R RAHALCALLOT, G RANCOITA, PG RATTAGGI, M RAVEN, G RAZIS, P READ, K REN, D REN, Z RESCIGNO, M REUCROFT, S RICKER, A RIEMANN, S RIEMERS, W RIND, O RIZVI, HA RODRIGUEZ, FJ ROHNER, M ROHNER, S ROMERO, L ROSE, J ROSIERLEES, S ROSMALEN, R ROSSELET, P RUBBIA, A RUBIO, JA RYKACZEWSKI, H SACHWITZ, M SAJAN, E SALICIO, J SALICIO, JM SANDERS, GS SANTOCCHIA, A SARAKINOS, MS SARTORELLI, G SASSOWSKY, M SAUVAGE, G SCHEGELSKY, V SCHMITZ, D SCHMITZ, P SCHNEEGANS, M SCHOPPER, H SCHOTANUS, DJ SHOTKIN, S SCHREIBER, HJ SHUKLA, J SCHULTE, R SCHULTE, S SCHULTZE, K SCHWENKE, J SCHWERING, G SCIACCA, C SCOTT, I SEHGAL, R SEILER, PG SENS, JC SERVOLI, L SHEER, I SHEN, DZ SHEVCHENKO, S SHI, XR SHUMILOV, E SHOUTKO, V SON, D SOPCZAK, A SPARTIOTIS, C SPICKERMANN, T SPILLANTINI, P STAROSTA, R STEUER, M STICKLAND, DP STICOZZI, F STONE, H STRAUCH, K STRINGFELLOW, BC SUDHAKAR, K SULTANOV, G SUN, LZ SUTER, H SWAIN, JD SYED, AA TANG, XW TAYLOR, L TERZI, G TING, SCC TING, SM TONUTTI, M TONWAR, SC TOTH, J TSAREGORODTSEV, A TSIPOLITIS, G TULLY, C TUNG, KI ULBRICHT, J URBAN, L UWER, U VALENTE, E VANDEWALLE, RT VETLITSKY, I VIERTEL, G VIKAS, P VIKAS, U VIVARGENT, M VOGEL, H VOGT, H VOROBIEV, I VOROBOYOV, AA VUILLEUMIER, L WADHWA, M WALLRAFF, W WANG, C WANG, CR WANG, GH WANG, XL WANG, YF WANG, ZM WEBER, A WEBER, J WEILL, R WENAUS, TJ WENNINGER, J WHITE, M WILLMOTT, C WITTGENSTEIN, F WRIGHT, D WU, SX WYSLOUCH, B XIE, YY XU, JG XU, ZZ XUE, ZL YAN, DS YANG, BZ YANG, CG YANG, LG YE, CH YE, JB YE, Q YEH, SC YIN, ZW YOU, JM YUNUS, N YZERMAN, M ZACCARDELLI, C ZEMP, P ZENG, M ZENG, Y ZHANG, DH ZHANG, ZP ZHOU, B ZHOU, GJ ZHU, RY ZICHICHI, A VANDERZWAAN, BCC AF ADRIANI, O AGUILARBENITEZ, M AHLEN, S ALCARAZ, J ALOISIO, A ALVERSON, G ALVIGGI, MG AMBROSI, G AN, Q ANDERHUB, H ANDERSON, AL ANDREEV, VP ANTONOV, L ANTREASYAN, D ARCE, P AREFIEV, A ATAMANCHUK, A AZEMOON, T AZIZ, T BABA, PVKS BAGNAIA, P BAKKEN, JA BAKSAY, L BALL, RC BANERJEE, S BAO, J BARILLERE, R BARONE, L BASCHIROTTO, A BATTISTON, R BAY, A BECATTINI, F BECKER, U BEHNER, F BEHRENS, J BENCZE, GL BERDUGO, J BERGES, P BERTUCCI, B BETEV, BL BIASINI, M BILAND, A BILEI, GM BIZZARRI, R BLAISING, JJ BOBBINK, GJ BOCK, R BOHM, A BORGIA, B BOSETI, M BOURILKOV, D BOURQUIN, M BOUTIGNY, D BOUWENS, B BRAMBILLA, E BRANSON, JG BROCK, IC BROOKS, M BUJAK, A BURGER, JD BURGER, WJ BUSENITZ, J CAI, XD CAPELL, M CARIA, M CARLINO, G CARTACCI, AM CASTELLO, R CERRADA, M CESARONI, F CHANG, YH CHATURVEDI, UK CHEMARIN, M CHEN, A CHEN, C CHEN, GM CHEN, HF CHEN, HS CHEN, M CHEN, WY CHIEFARI, G CHIEN, CY CHOI, MT CHUNG, S CIVININI, C CLARE, I CLARE, R COAN, TE COHN, HO COIGNET, G COLINO, N CONTIN, A CUI, XT CUI, XY DAI, TS DALESSANDRO, R DEASMUNDIS, R DEGRE, A DEITERS, K DENES, E DENES, P DENOTARISTEFANI, F DHINA, M DIBITONTO, D DIEMOZ, M DIMITROV, HR DIONISI, C DJAMBAZOV, L DOVA, MT DRAGO, E DRIEVER, T DUCHESNEAU, D DUINKER, P DURAN, I EASO, S ELMAMOUNI, H ENGLER, A EPPLING, FJ ERNE, FC EXTERMANN, P FABBRETTI, R FABRE, M FALCIANO, S FAN, SJ FACKLER, O FAY, J FELCINI, M FERGUSON, T FERNANDEZ, D FERNANDEZ, G FERRONI, F FESEFELDT, H FIANDRINI, E FIELD, J FILTHAUT, F FINOCCHIARO, G FISHER, PH FORCONI, G FOREMAN, T FREUDENREICH, K FRIEBEL, W FUKUSHIMA, M GAILLOUD, M GALAKTIONOV, Y GALLO, E GANGULI, SN GARCIAABIA, P GELE, D GENTILE, S GOLDFARB, S GONG, ZF GONZALEZ, E GOUGAS, A GOUJON, D GRATTA, G GRUENEWALD, M GU, C GUANZIROLI, M GUO, JK GUPTA, VK GURTU, A GUSTAFSON, HR GUTAY, LJ HANGARTER, K HASAN, A HAUSCHILDT, D HE, CF HE, JT HEBBEKER, T HEBER, M HERTEN, C HERVE, A HILGERS, K HOFER, H HOORANI, H HU, G HU, GQ ILLE, B ILYAS, MM INNOCENTE, V JANSSEN, H JEZEQUEL, S JIN, BN KASSER, A KHAN, RA KAMYSHKOV, Y KAPINOS, P KAPUSTINSKY, JS KARYOTAKIS, Y KAUR, M KHOKHAR, S KIENZLEFOCACCI, MN KIM, JK KIM, SC KIM, YG KINNISON, WW KIRKBY, D KIRSCH, S KITTEL, W KLIMENTOV, A KONIG, AC KOFFEMAN, E KORNADT, O KOUTSENKO, V KOULBARDIS, A KRAEMER, RW KRAMER, T KRASTEV, VR KRENZ, W KRIVSHICH, A KUIJTEN, H KUMAR, KS KUNIN, A LANDI, G LANSKE, D LANZANO, S LEBRUN, P LECOMTE, P LECOQ, P LECOULTRE, P LEE, DM LEEDOM, I LEGGETT, C LEGOFF, JM LEISTE, R LENTI, M LEONARDI, E LEYTENS, X LI, C LI, HT LI, PJ LIAO, JY LIN, WT LIN, ZY LINDE, FL LINDEMANN, B LISTA, L LIU, Y LOHMANN, W LONGO, E LU, YS LUBBERS, JM LUBELSMEYER, K LUCI, C LUCKEY, D LUDOVICI, L LUMINARI, L LUSTERMANN, W MA, JM MA, WG MACDERMOTT, M MALHOTRA, PK MALIK, R MALININ, A MANA, C MAOLINBAY, M MARCHESINI, P MARION, F MARIN, A MARTIN, JP MARTINEZLASO, L MARZANO, F MASSARO, GGG MAZUMDAR, K MCBRIDE, P MCMAHON, T MCNALLY, D MERK, M MEROLA, L MESCHINI, M METZGER, WJ MI, Y MILLS, GB MIR, Y MIRABELLI, G MNICH, J MOLLER, M MONTELEONI, B MORAND, R MORGANTI, S MOULAI, NE MOUNT, R MULLER, S NADTOCHY, A NAGY, E NAPOLITANO, M NEWMAN, H NEYER, C NIAZ, MA NIPPE, A NOWAK, H ORGANTINI, G PANDOULAS, D PAOLETTI, S PAOLUCCI, P PASCALA, G PASSALEVA, G PATRICELLI, S PAUL, T PAULUZZI, M PAUS, C PAUSS, F PEI, YJ PENSOTTI, S PERRETGALLIX, D PERRIER, J PEVSNER, A PICCOLO, D PIERI, M PITOUE, PA PLASIL, F PLYASKIN, V POHL, M POJIDAEV, V POSTEMA, H QI, ZD QIAN, JM QURESHI, KN RAGHAVAN, R RAHALCALLOT, G RANCOITA, PG RATTAGGI, M RAVEN, G RAZIS, P READ, K REN, D REN, Z RESCIGNO, M REUCROFT, S RICKER, A RIEMANN, S RIEMERS, W RIND, O RIZVI, HA RODRIGUEZ, FJ ROHNER, M ROHNER, S ROMERO, L ROSE, J ROSIERLEES, S ROSMALEN, R ROSSELET, P RUBBIA, A RUBIO, JA RYKACZEWSKI, H SACHWITZ, M SAJAN, E SALICIO, J SALICIO, JM SANDERS, GS SANTOCCHIA, A SARAKINOS, MS SARTORELLI, G SASSOWSKY, M SAUVAGE, G SCHEGELSKY, V SCHMITZ, D SCHMITZ, P SCHNEEGANS, M SCHOPPER, H SCHOTANUS, DJ SHOTKIN, S SCHREIBER, HJ SHUKLA, J SCHULTE, R SCHULTE, S SCHULTZE, K SCHWENKE, J SCHWERING, G SCIACCA, C SCOTT, I SEHGAL, R SEILER, PG SENS, JC SERVOLI, L SHEER, I SHEN, DZ SHEVCHENKO, S SHI, XR SHUMILOV, E SHOUTKO, V SON, D SOPCZAK, A SPARTIOTIS, C SPICKERMANN, T SPILLANTINI, P STAROSTA, R STEUER, M STICKLAND, DP STICOZZI, F STONE, H STRAUCH, K STRINGFELLOW, BC SUDHAKAR, K SULTANOV, G SUN, LZ SUTER, H SWAIN, JD SYED, AA TANG, XW TAYLOR, L TERZI, G TING, SCC TING, SM TONUTTI, M TONWAR, SC TOTH, J TSAREGORODTSEV, A TSIPOLITIS, G TULLY, C TUNG, KI ULBRICHT, J URBAN, L UWER, U VALENTE, E VANDEWALLE, RT VETLITSKY, I VIERTEL, G VIKAS, P VIKAS, U VIVARGENT, M VOGEL, H VOGT, H VOROBIEV, I VOROBOYOV, AA VUILLEUMIER, L WADHWA, M WALLRAFF, W WANG, C WANG, CR WANG, GH WANG, XL WANG, YF WANG, ZM WEBER, A WEBER, J WEILL, R WENAUS, TJ WENNINGER, J WHITE, M WILLMOTT, C WITTGENSTEIN, F WRIGHT, D WU, SX WYSLOUCH, B XIE, YY XU, JG XU, ZZ XUE, ZL YAN, DS YANG, BZ YANG, CG YANG, LG YE, CH YE, JB YE, Q YEH, SC YIN, ZW YOU, JM YUNUS, N YZERMAN, M ZACCARDELLI, C ZEMP, P ZENG, M ZENG, Y ZHANG, DH ZHANG, ZP ZHOU, B ZHOU, GJ ZHU, RY ZICHICHI, A VANDERZWAAN, BCC TI SEARCH FOR NONMINIMAL HIGGS BOSONS IN Z0 DECAYS SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID MASS SUM-RULES; CHARGED HIGGS; RADIATIVE-CORRECTIONS; SUPERSYMMETRIC MODEL; E+E ANNIHILATION; STANDARD MODEL; LEP; TECHNIPIONS; COLLISIONS; EXTENSION AB We report on a search for the neutral and charged Higgs bosons predicted by models of spontaneous symmetry breaking with more than one Higgs doublet field. No signals are observed. We set model-independent limits on masses or branching ratios of singly and pair-produced neutral and charged Higgs bosons. In addition, we interpret our results in the framework of a general two-doublet Higgs model and the Minimal Supersymmetric extension of the Standard Model. C1 RHEIN WESTFAL TH AACHEN, INST PHYS 1, W-5100 AACHEN, GERMANY. RHEIN WESTFAL TH AACHEN, INST PHYS 3, W-5100 AACHEN, GERMANY. NATL INST HIGH ENERGY PHYS, NIKHEFM, 1009 DB AMSTERDAM, NETHERLANDS. UNIV MICHIGAN, ANN ARBOR, MI 48109 USA. LAB DANNECY LE VIEUX PHYS PARTICULES, IN2P3, CNRS, F-74941 ANNECY LE VIEUX, FRANCE. JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA. INST HIGH ENERGY PHYS, BEIJING 100039, PEOPLES R CHINA. INFN, SEZ BOLOGNA, I-40126 BOLOGNA, ITALY. TATA INST FUNDAMENTAL RES, BOMBAY 400005, INDIA. BOSTON UNIV, BOSTON, MA 02215 USA. NORTHEASTERN UNIV, BOSTON, MA 02115 USA. HUNGARIAN ACAD SCI, CENT RES INST PHYS, H-1525 BUDAPEST 114, HUNGARY. HOWARD UNIV, CAMBRIDGE, MA 02139 USA. MIT, CAMBRIDGE, MA 02139 USA. UNIV FLORENCE, I-50125 FLORENCE, ITALY. CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND. WORLD LAB, FBLJA PROJECT, CH-1211 GENEVA 23, SWITZERLAND. UNIV GENEVA, CH-1211 GENEVA 4, SWITZERLAND. CHINESE UNIV SCI & TECHNOL, HEFEI 230029, PEOPLES R CHINA. UNIV LAUSANNE, CH-1015 LAUSANNE, SWITZERLAND. LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA. UNIV LYON 1, INST PHYS NUCL LYON, IN2P3, CNRS, F-69622 VILLEURBANNE, FRANCE. CTR INVEST ENERGET MEDIOAMBIENTALES & TECNOL, E-28040 MADRID, SPAIN. INFN, SEZ MILANO, I-20133 MILAN, ITALY. INST THEORET & EXPTL PHYS, MOSCOW, RUSSIA. INFN, SEZ NAPOLI, I-80125 NAPLES, ITALY. UNIV NAPLES, I-80125 NAPLES, ITALY. UNIV CYPRUS, DEPT NAT SCI, NICOSIA, CYPRUS. NATL INST NUCL PHYS & HIGH ENERGY PHYS, 6525 ED NIJMEGEN, NETHERLANDS. CATHOLIC UNIV NIJMEGEN, 6525 ED NIJMEGEN, NETHERLANDS. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. CALTECH, PASADENA, CA 91125 USA. UNIV PERUGIA, I-06100 PERUGIA, ITALY. INFN, SEZ PERUGIA, I-06100 PERUGIA, ITALY. CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA. PRINCETON UNIV, PRINCETON, NJ 08544 USA. UNIV ROMA LA SAPIENZA, I-00185 ROME, ITALY. INFN, SEZ ROMA, I-00185 ROME, ITALY. NUCL PHYS INST, ST PETERSBURG, RUSSIA. UNIV CALIF SAN DIEGO, LA JOLLA, CA 92093 USA. UNIV SANTIAGO, DEPT FIS PARTICULAS ELEMENTALES, E-15706 SANTIAGO, SPAIN. SHANGHAI INST CERAM, SHANGHAI, PEOPLES R CHINA. BULGARIAN ACAD SCI, INST MECHATRON, BU-1113 SOFIA, BULGARIA. KOREA ADV INST SCI & TECHNOL, CTR HIGH ENERGY PHYS, TAEJON 305701, SOUTH KOREA. UNIV ALABAMA, TUSCALOOSA, AL 35401 USA. PURDUE UNIV, W LAFAYETTE, IN 47907 USA. PAUL SCHERRER INST, CH-5232 VILLIGEN, SWITZERLAND. DESY, INST HOCHENERGIEPHYS, O-1615 ZEUTHEN, GERMANY. SWISS FED INST TECHNOL, CH-8093 ZURICH, SWITZERLAND. UNIV HAMBURG, W-2000 HAMBURG 13, GERMANY. HIGH ENERGY PHYS GRP, HINSCHU, TAIWAN. RP ADRIANI, O (reprint author), INFN, SEZ FIRENZE, I-50125 FLORENCE, ITALY. RI D'Alessandro, Raffaello/F-5897-2015; Fiandrini, Emanuele/C-4549-2008; Leijtens, Xaveer/F-3302-2010; Lista, Luca/C-5719-2008; Ludovici, Lucio/F-5917-2011; Servoli, Leonello/E-6766-2012; bertucci, bruna/J-5237-2012; Cerrada, Marcos/J-6934-2014; Gonzalez Romero, Enrique/L-7561-2014; Berdugo, Javier/A-2858-2015; van der Zwaan, Bob/F-4070-2015; Duran, Ignacio/H-7254-2015; rodriguez calonge, francisco javier/H-9682-2015; Rancoita, Pier Giorgio/J-9896-2015; Hoorani, Hafeez/D-1791-2013; Arce, Pedro/L-1268-2014; Tsaregorodtsev, Andrei/E-3873-2016; Ferguson, Thomas/O-3444-2014; Vogel, Helmut/N-8882-2014 OI D'Alessandro, Raffaello/0000-0001-7997-0306; Leijtens, Xaveer/0000-0001-7794-8236; Ludovici, Lucio/0000-0003-1970-9960; Servoli, Leonello/0000-0003-1725-9185; Cerrada, Marcos/0000-0003-0112-1691; Gonzalez Romero, Enrique/0000-0003-2376-8920; Berdugo, Javier/0000-0002-7911-8532; van der Zwaan, Bob/0000-0001-5871-7643; Bertucci, Bruna/0000-0001-7584-293X; Rancoita, Pier Giorgio/0000-0002-1990-4283; Arce, Pedro/0000-0003-3009-0484; Longo, Egidio/0000-0001-6238-6787; Tsaregorodtsev, Andrei/0000-0003-4618-520X; Ferguson, Thomas/0000-0001-5822-3731; Diemoz, Marcella/0000-0002-3810-8530; Vogel, Helmut/0000-0002-6109-3023 NR 64 TC 23 Z9 23 U1 1 U2 8 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 FEB PY 1993 VL 57 IS 3 BP 355 EP 381 PG 27 WC Physics, Particles & Fields SC Physics GA KP270 UT WOS:A1993KP27000001 ER PT J AU BECK, JC LEKUTIS, C COUCHMAN, J PARRY, G AF BECK, JC LEKUTIS, C COUCHMAN, J PARRY, G TI STAGE-SPECIFIC REMODELING OF THE MAMMARY-GLAND BASEMENT-MEMBRANE DURING LACTOGENIC DEVELOPMENT SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS LA English DT Article ID EPITHELIAL-CELLS; COLLAGENOUS SUBSTRATA; EXTRACELLULAR-MATRIX; SULFATE PROTEOGLYCAN; GENE-EXPRESSION; GLYCOSAMINOGLYCANS; DIFFERENTIATION; CULTURES; COMPONENTS; SECRETION C1 LAWRENCE BERKELEY LAB,DIV CELL & MOLEC BIOL,BERKELEY,CA 94720. UNIV ALABAMA,DEPT CELL BIOL & ANAT,BIRMINGHAM,AL 35294. FU NCI NIH HHS [R01 CA 44398]; NIAMS NIH HHS [R01 AR36457] NR 24 TC 7 Z9 7 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 JAN 29 PY 1993 VL 190 IS 2 BP 616 EP 623 DI 10.1006/bbrc.1993.1093 PG 8 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA KK585 UT WOS:A1993KK58500045 PM 8427603 ER PT J AU GRATZ, AJ DELOACH, LD CLOUGH, TM NELLIS, WJ AF GRATZ, AJ DELOACH, LD CLOUGH, TM NELLIS, WJ TI SHOCK AMORPHIZATION OF CRISTOBALITE SO SCIENCE LA English DT Article ID PRESSURE; POWDERS; SILICA AB Shock amorphization of cristobalite is reported and related to shock metamorphism of quartz, both being silicon dioxide polymorphs. Whereas amorphization of quartz takes place over a broad pressure range and is complete only at 35 to 40 gigapascals (350 to 400 kilobars), amorphization of cristobalite was complete (greater than 99.9 percent) by 28 gigapascals with a relatively sharp phase transformation; lower shock pressures up to 23 gigapascals resulted in no significant amorphization. Also, unlike quartz, there was no sign of lamellar amorphization, which is common in shock compression. Cristobalite amorphization should prove a useful indicator of shock pressure and is the first case of pressure amorphization of isochemical polymorphs. The diaplectic glass that is produced has a refractive index and density essentially identical to those of the diaplectic glass made from quartz, which suggests that both polymorphs collapse during shock to similar disordered phases. C1 LAWRENCE LIVERMORE NATL LAB,DIV H,LIVERMORE,CA 94550. ARIZONA STATE UNIV,DEPT CHEM,TEMPE,AZ 85287. RP GRATZ, AJ (reprint author), LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA 94550, USA. NR 26 TC 35 Z9 36 U1 0 U2 4 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD JAN 29 PY 1993 VL 259 IS 5095 BP 663 EP 666 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KJ688 UT WOS:A1993KJ68800037 ER PT J AU SINGER, PT SMALAS, A CARTY, RP MANGEL, WF SWEET, RM AF SINGER, PT SMALAS, A CARTY, RP MANGEL, WF SWEET, RM TI THE HYDROLYTIC WATER MOLECULE IN TRYPSIN, REVEALED BY TIME-RESOLVED LAUE CRYSTALLOGRAPHY SO SCIENCE LA English DT Article ID CRYSTAL-STRUCTURE; RESOLUTION AB Crystals of bovine trypsin were acylated at the reactive residue, serine 195, to form the transiently stable p-guanidinobenzoate. Hydrolysis of this species was triggered in the crystals by a jump in pH. The hydrolysis was monitored by three-dimensional Laue crystallography, resulting in three x-ray diffraction structures, all from the same crystal and each representing approximately 5 seconds of x-ray exposure. The structures were analyzed at a nominal resolution of 1.8 angstroms and were of sufficient quality to reproduce subtle features in the electron-density maps for each of the structures. Comparison of the structures before and after the pH jump reveals that a water molecule has positioned itself to attack the acyl group in the initial step of the hydrolysis of this transient intermediate. C1 BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. ARGONNE NATL LAB,DEPT BIOL,ARGONNE,IL 60439. UNIV TROMSO,INST MATH & PHYS SCI,N-9000 TROMSO,NORWAY. SUNY HLTH SCI CTR,DEPT BIOCHEM,BROOKLYN,NY 11203. RI Smalas, Arne/C-4131-2016 OI Smalas, Arne/0000-0002-4651-9911 NR 12 TC 97 Z9 98 U1 0 U2 2 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD JAN 29 PY 1993 VL 259 IS 5095 BP 669 EP 673 DI 10.1126/science.8430314 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KJ688 UT WOS:A1993KJ68800039 PM 8430314 ER PT J AU BOCK, Y AGNEW, DC FANG, P GENRICH, JF HAGER, BH HERRING, TA HUDNUT, KW KING, RW LARSEN, S MINSTER, JB STARK, K WDOWINSKI, S WYATT, FK AF BOCK, Y AGNEW, DC FANG, P GENRICH, JF HAGER, BH HERRING, TA HUDNUT, KW KING, RW LARSEN, S MINSTER, JB STARK, K WDOWINSKI, S WYATT, FK TI DETECTION OF CRUSTAL DEFORMATION FROM THE LANDERS EARTHQUAKE SEQUENCE USING CONTINUOUS GEODETIC MEASUREMENTS SO NATURE LA English DT Article ID GLOBAL POSITIONING SYSTEM; PHASE AMBIGUITY RESOLUTION; CALIFORNIA; FAULTS; SHEAR AB THE measurement of crustal motions in tectonically active regions is being performed increasingly by the satellite-based Global Positioning System (GPS)1,2, which offers considerable advantages over conventional geodetic techniques3,4. Continuously operating GPS arrays with ground-based receivers spaced tens of kilometres apart have been established in central Japan5,6 and southern California to monitor the spatial and temporal details of crustal deformation. Here we report the first measurements for a major earthquake by a continuously operating GPS network, the Permanent GPS Geodetic Array (PGGA)7-9 in southern California. The Landers (magnitude M(w) of 7.3) and Big Bear (M(w) 6.2) earthquakes of 28 June 1992 were monitored by daily observations. Ten weeks of measurements, centred on the earthquake events, indicate significant coseismic motion at all PGGA sites, significant post-seismic motion at one site for two weeks after the earthquakes, and no significant preseismic motion. These measurements demonstrate the potential of GPS monitoring for precise detection of precursory and aftershock seismic deformation in the near and far field. C1 MIT,DEPT EARTH ATMOSPHER & PLANETARY SCI,CAMBRIDGE,MA 02139. US GEOL SURVEY,PASADENA,CA 91106. LAWRENCE LIVERMORE NATL LAB,DIV SCI SOFTWARE,LIVERMORE,CA 94550. RP BOCK, Y (reprint author), UNIV CALIF SAN DIEGO,SCRIPPS INST OCEANOG,INST GEOPHYS & PLANETARY PHYS,LA JOLLA,CA 92093, USA. RI Wdowinski, Shimon/A-4118-2008; Hudnut, Kenneth/B-1945-2009; Hudnut, Kenneth/G-5713-2010; OI Hudnut, Kenneth/0000-0002-3168-4797; Agnew, Duncan/0000-0002-2360-7783; Minster, Jean Bernard/0000-0003-1268-5177 NR 24 TC 75 Z9 76 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 JAN 28 PY 1993 VL 361 IS 6410 BP 337 EP 340 DI 10.1038/361337a0 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KJ590 UT WOS:A1993KJ59000051 ER PT J AU AHMED, T ANDREEV, V ANDRIEU, B ARPAGAUS, M BABAEV, A BARWOLFF, H BAN, J BARANOV, P BARRELET, E BARTEL, W BASSLER, U BECK, GA BECK, HP BEHREND, HJ BELOUSOV, A BERGER, C BERGSTEIN, H BERNARDI, G BERNET, R BERTHON, U BERTRANDCOREMANS, G BESANCON, M BIDDULPH, P BINDER, E BIZOT, JC BLOBEL, V BORRAS, K BOSETTI, PC BOUDRY, V BOURDARIOS, C BRASSE, F BRAUN, U BRAUNSCHWEIG, W BRISSON, V BRUNCKO, D BURGER, J BUSSER, FW BUNIATIAN, A BURKE, S BUSCHHORN, G CAMPBELL, AJ CARLI, T CHARLES, F CLARKE, D CLEGG, AB COLOMBO, M COUGHLAN, JA COURAU, A COUTURES, C COZZIKA, G CRIEGEE, L CVACH, J DAINTON, JB DANILOV, M DANN, AWE DAU, WD DAVID, M DEFFUR, E DELCOURT, B DELBUONO, L DEVEL, M DEROECK, A DINGUS, P DOLLFUS, C DOWELL, JD DREIS, HB DRESCHER, A DUBOC, J DULLMANN, D DUNGER, O DUHM, H EBERLE, M EBERT, J EBERT, TR ECKERLIN, G EFREMENKO, V EGLI, S EICHENBERGER, S EICHLER, R EISELE, F EISENHANDLER, E ELLIS, NN ELLISON, RJ ELSEN, E ERDMANN, M EVRARD, E FAVART, L FEDOTOV, A FEEKEN, D FELST, R FELTESSE, J FENG, Y FENSOME, IF FERENCEI, J FERRAROTTO, F FLAUGER, W FLEISCHER, M FLOWER, PS FLUGGE, G FOMENKO, A FOMINYKH, B FORBUSH, M FORMANEK, J FOSTER, JM FRANKE, G FRETWURST, E FUHRMANN, P GABATHULER, E GAMERDINGER, K GARVEY, J GAYLER, J GELLRICH, A GENNIS, M GENSCH, U GENZEL, H GERHARDS, R GILLESPIE, D GODFREY, L GOERLACH, U GOERLICH, L GOLDBERG, M GOODALL, AM GORELOV, I GORITCHEV, P GRAB, C GRASSLER, H GRASSLER, R GREENSHAW, T GREIF, H GRINDHAMMER, G GRUBER, C HAACK, J HAIDT, D HAJDUK, L HAMON, O HANDSCHUH, D HANLON, EM HAPKE, M HARJES, J HARTZ, P HAYDAR, R HAYNES, WJ HEATHERINGTON, J HEDBERG, V HEDGECOCK, R HEINZELMANN, G HENDERSON, RCW HENSCHEL, H HERMA, R HERYNEK, I HILDESHEIM, W HILL, P HILTON, CD HLADKY, J HOEGER, KC HUET, P HUFNAGEL, H HUOT, N IBBOTSON, M JABIOL, MA JACHOLKOWSKA, A JACOBSSON, C JAFFRE, M JONSSON, L JOHANNSEN, K JOHNSON, DP JOHNSON, L JUNG, H KALMUS, PIP KASARIAN, S KASCHOWITZ, R KASSELMANN, P KATHAGE, U KAUFMANN, HH KENYON, IR KERMICHE, S KIESLING, C KLEIN, M KLEINWORT, C KNIES, G KOHLER, T KOLANOSKI, H KOLE, F KOLYA, SD KORBEL, V KORN, M KOSTKA, P KOTELNIKOV, SK KRASNY, MW KREHBIEL, H KRUCKER, D KRUGER, U KUBENKA, JP KUSTER, H KUHLEN, M KURCA, T KURZHOFER, J KUZNIK, B LANDER, R LANDON, MPJ LANGKAU, R LANIUS, P LAPORTE, JF LEBEDEV, A LEUSCHNER, A LEVERENZ, C LEVIN, D LEVONIAN, S LEY, O LINDNER, A LINDSTROM, G LOCH, P LOHMANDER, H LOPEZ, GC LUERS, D MAGNUSSEN, N MALINOVSKI, E MANI, S MARAGE, P MARKS, J MARSHALL, R MARTENS, J MARTIN, R MARTYN, HU MARTYNIAK, J MASSON, S MAVROIDIS, A MAXFIELD, SJ MCMAHON, SJ MEHTA, A MEIER, K MERZ, T MEYER, CA MEYER, H MEYER, J MIKOCKI, S MILONE, V MONNIER, E MOREAU, F MOREELS, J MORRIS, JV MORTON, JM MULLER, K MURIN, P MURRAY, SA NAGOVIZIN, V NAROSKA, B NAUMANN, T NEWTON, D NGUYEN, HK NIEBERGALL, F NISIUS, R NOWAK, G NOYES, GW NYBERG, M OBERLACK, H OBROCK, U OLSSON, JE ORENSTEIN, S OULDSAADA, F PASCAUD, C PATEL, GD PEPPEL, E PETERS, S PHILLIPS, HT PHILLIPS, JP PICHLER, C PILGRAM, W PITZL, D PROSI, R RAUPACH, F RAUSCHNABEL, K REIMER, P RIBARICS, P RIECH, V RIEDLBERGER, J RIETZ, M ROBERTSON, SM ROBMANN, P ROOSEN, R ROSTOVTSEV, A ROYON, C RUDOWICZ, M RUFFER, M RUSAKOV, S RYBICKI, K RYSECK, E SACTON, J SAHLMANN, N SANCHEZ, E SANKEY, DPC SAVITSKY, M SCHACHT, P SCHLEPER, P VONSCHLIPPE, W SCHMIDT, C SCHMIDT, D SCHMITZ, W SCHRODER, V SCHULZ, M SCHWIND, A SCOBEL, W SEEHAUSEN, U SELL, R SEMAN, M SEMENOV, A SHEKELYAN, V SHEVIAKOV, I SHOOSHTARI, H SIEGMON, G SIEWERT, U SIROIS, Y SKILLICORN, IO SMIRNOV, P SMITH, JR SMOLIK, L SOLOVIEV, Y SPITZER, H STAROBA, P STEENBOCK, M STEFFEN, P STEINBERG, R STEINER, H STELLA, B STEPHENS, K STIER, J STRACHOTA, J STRAUMANN, U STRUCZINSKI, W SUTTON, JP TAYLOR, RE THOMPSON, G THOMPSON, RJ TICHOMIROV, I TRENKEL, C TRUOL, P TCHERNYSHOV, V TURNAU, J TUTAS, J URBAN, L USIK, A VALKAR, S VALKAROVA, A VALLEE, C VANESCH, P VARTAPETIAN, A VAZDIK, Y VECKO, M VERRECCHIA, P VICK, R VILLET, G VOGEL, E WACKER, K WALKER, IW WALTHER, A WEBER, G WEGENER, D WEGNER, A WELLISCH, HP WILLARD, S WINDE, M WINTER, GG WOLFF, T WOMERSLEY, LA WRIGHT, AE WULFF, N YIOU, TP ZACEK, J ZAVADA, P ZEITNITZ, C ZIAEEPOUR, H ZIMMER, M ZIMMERMANN, W ZOMER, F AF AHMED, T ANDREEV, V ANDRIEU, B ARPAGAUS, M BABAEV, A BARWOLFF, H BAN, J BARANOV, P BARRELET, E BARTEL, W BASSLER, U BECK, GA BECK, HP BEHREND, HJ BELOUSOV, A BERGER, C BERGSTEIN, H BERNARDI, G BERNET, R BERTHON, U BERTRANDCOREMANS, G BESANCON, M BIDDULPH, P BINDER, E BIZOT, JC BLOBEL, V BORRAS, K BOSETTI, PC BOUDRY, V BOURDARIOS, C BRASSE, F BRAUN, U BRAUNSCHWEIG, W BRISSON, V BRUNCKO, D BURGER, J BUSSER, FW BUNIATIAN, A BURKE, S BUSCHHORN, G CAMPBELL, AJ CARLI, T CHARLES, F CLARKE, D CLEGG, AB COLOMBO, M COUGHLAN, JA COURAU, A COUTURES, C COZZIKA, G CRIEGEE, L CVACH, J DAINTON, JB DANILOV, M DANN, AWE DAU, WD DAVID, M DEFFUR, E DELCOURT, B DELBUONO, L DEVEL, M DEROECK, A DINGUS, P DOLLFUS, C DOWELL, JD DREIS, HB DRESCHER, A DUBOC, J DULLMANN, D DUNGER, O DUHM, H EBERLE, M EBERT, J EBERT, TR ECKERLIN, G EFREMENKO, V EGLI, S EICHENBERGER, S EICHLER, R EISELE, F EISENHANDLER, E ELLIS, NN ELLISON, RJ ELSEN, E ERDMANN, M EVRARD, E FAVART, L FEDOTOV, A FEEKEN, D FELST, R FELTESSE, J FENG, Y FENSOME, IF FERENCEI, J FERRAROTTO, F FLAUGER, W FLEISCHER, M FLOWER, PS FLUGGE, G FOMENKO, A FOMINYKH, B FORBUSH, M FORMANEK, J FOSTER, JM FRANKE, G FRETWURST, E FUHRMANN, P GABATHULER, E GAMERDINGER, K GARVEY, J GAYLER, J GELLRICH, A GENNIS, M GENSCH, U GENZEL, H GERHARDS, R GILLESPIE, D GODFREY, L GOERLACH, U GOERLICH, L GOLDBERG, M GOODALL, AM GORELOV, I GORITCHEV, P GRAB, C GRASSLER, H GRASSLER, R GREENSHAW, T GREIF, H GRINDHAMMER, G GRUBER, C HAACK, J HAIDT, D HAJDUK, L HAMON, O HANDSCHUH, D HANLON, EM HAPKE, M HARJES, J HARTZ, P HAYDAR, R HAYNES, WJ HEATHERINGTON, J HEDBERG, V HEDGECOCK, R HEINZELMANN, G HENDERSON, RCW HENSCHEL, H HERMA, R HERYNEK, I HILDESHEIM, W HILL, P HILTON, CD HLADKY, J HOEGER, KC HUET, P HUFNAGEL, H HUOT, N IBBOTSON, M JABIOL, MA JACHOLKOWSKA, A JACOBSSON, C JAFFRE, M JONSSON, L JOHANNSEN, K JOHNSON, DP JOHNSON, L JUNG, H KALMUS, PIP KASARIAN, S KASCHOWITZ, R KASSELMANN, P KATHAGE, U KAUFMANN, HH KENYON, IR KERMICHE, S KIESLING, C KLEIN, M KLEINWORT, C KNIES, G KOHLER, T KOLANOSKI, H KOLE, F KOLYA, SD KORBEL, V KORN, M KOSTKA, P KOTELNIKOV, SK KRASNY, MW KREHBIEL, H KRUCKER, D KRUGER, U KUBENKA, JP KUSTER, H KUHLEN, M KURCA, T KURZHOFER, J KUZNIK, B LANDER, R LANDON, MPJ LANGKAU, R LANIUS, P LAPORTE, JF LEBEDEV, A LEUSCHNER, A LEVERENZ, C LEVIN, D LEVONIAN, S LEY, O LINDNER, A LINDSTROM, G LOCH, P LOHMANDER, H LOPEZ, GC LUERS, D MAGNUSSEN, N MALINOVSKI, E MANI, S MARAGE, P MARKS, J MARSHALL, R MARTENS, J MARTIN, R MARTYN, HU MARTYNIAK, J MASSON, S MAVROIDIS, A MAXFIELD, SJ MCMAHON, SJ MEHTA, A MEIER, K MERZ, T MEYER, CA MEYER, H MEYER, J MIKOCKI, S MILONE, V MONNIER, E MOREAU, F MOREELS, J MORRIS, JV MORTON, JM MULLER, K MURIN, P MURRAY, SA NAGOVIZIN, V NAROSKA, B NAUMANN, T NEWTON, D NGUYEN, HK NIEBERGALL, F NISIUS, R NOWAK, G NOYES, GW NYBERG, M OBERLACK, H OBROCK, U OLSSON, JE ORENSTEIN, S OULDSAADA, F PASCAUD, C PATEL, GD PEPPEL, E PETERS, S PHILLIPS, HT PHILLIPS, JP PICHLER, C PILGRAM, W PITZL, D PROSI, R RAUPACH, F RAUSCHNABEL, K REIMER, P RIBARICS, P RIECH, V RIEDLBERGER, J RIETZ, M ROBERTSON, SM ROBMANN, P ROOSEN, R ROSTOVTSEV, A ROYON, C RUDOWICZ, M RUFFER, M RUSAKOV, S RYBICKI, K RYSECK, E SACTON, J SAHLMANN, N SANCHEZ, E SANKEY, DPC SAVITSKY, M SCHACHT, P SCHLEPER, P VONSCHLIPPE, W SCHMIDT, C SCHMIDT, D SCHMITZ, W SCHRODER, V SCHULZ, M SCHWIND, A SCOBEL, W SEEHAUSEN, U SELL, R SEMAN, M SEMENOV, A SHEKELYAN, V SHEVIAKOV, I SHOOSHTARI, H SIEGMON, G SIEWERT, U SIROIS, Y SKILLICORN, IO SMIRNOV, P SMITH, JR SMOLIK, L SOLOVIEV, Y SPITZER, H STAROBA, P STEENBOCK, M STEFFEN, P STEINBERG, R STEINER, H STELLA, B STEPHENS, K STIER, J STRACHOTA, J STRAUMANN, U STRUCZINSKI, W SUTTON, JP TAYLOR, RE THOMPSON, G THOMPSON, RJ TICHOMIROV, I TRENKEL, C TRUOL, P TCHERNYSHOV, V TURNAU, J TUTAS, J URBAN, L USIK, A VALKAR, S VALKAROVA, A VALLEE, C VANESCH, P VARTAPETIAN, A VAZDIK, Y VECKO, M VERRECCHIA, P VICK, R VILLET, G VOGEL, E WACKER, K WALKER, IW WALTHER, A WEBER, G WEGENER, D WEGNER, A WELLISCH, HP WILLARD, S WINDE, M WINTER, GG WOLFF, T WOMERSLEY, LA WRIGHT, AE WULFF, N YIOU, TP ZACEK, J ZAVADA, P ZEITNITZ, C ZIAEEPOUR, H ZIMMER, M ZIMMERMANN, W ZOMER, F TI TOTAL PHOTOPRODUCTION CROSS-SECTION MEASUREMENT AT HERA ENERGIES SO PHYSICS LETTERS B LA English DT Article ID PHOTONS AB We present first results on the total photoproduction cross section measurement with the H1 detector at HERA. The data were extracted from low Q2 collisions of 26.7 GeV electrons with 820 GeV protons. The gammap total cross section has been measured by two independent methods in the gammap center of mass energy range from 90 to 290 GeV. For an average center of mass energy of 195 GeV a value of sigma(tot) (gammap) = 159 +/- 7 (stat.) +/- 20 (syst.) mub was obtained. C1 PN LEBEDEV PHYS INST,117924 MOSCOW,RUSSIA. ECOLE POLYTECH,LPNHE,CNRS,IN2P3,F-91128 PALAISEAU,FRANCE. ETH,INST MITTELENERGIEPHYS,CH-5232 VILLIGEN,SWITZERLAND. MOSCOW INST THEORET & EXPTL PHYS,117259 MOSCOW,RUSSIA. DESY,INST HOCHENERGIEPHYS,O-1615 ZEUTHEN,GERMANY. SLOVAK ACAD SCI,INST EXPTL PHYS,CS-04353 KOSICE,CZECHOSLOVAKIA. DESY,W-2000 HAMBURG 52,GERMANY. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,ENGLAND. UNIV ZURICH,DEPT PHYS,CH-8001 ZURICH,SWITZERLAND. ULB,VUB,INTERUNIV INST HIGH ENERGIES,B-1050 BRUSSELS,BELGIUM. RHEIN WESTFAL TH AACHEN,INST PHYS 1,W-5100 AACHEN,GERMANY. CTR ETUD SACLAY,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE. UNIV MANCHESTER,DEPT PHYS,MANCHESTER M13 9PL,LANCS,ENGLAND. UNIV PARIS 11,CNRS,IN2P3,LAL,F-91405 ORSAY,FRANCE. UNIV HAMBURG,INST EXPTL PHYS 2,W-2000 HAMBURG 50,GERMANY. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. RHEIN WESTFAL TH AACHEN,INST PHYS 3,W-5100 AACHEN,GERMANY. UNIV GLASGOW,DEPT PHYS & ASTRON,GLASGOW G12 8QQ,SCOTLAND. UNIV KIEL,INST REINE & ANGEW KERNPHYS,W-2300 KIEL 1,GERMANY. MAX PLANCK INST PHYS & ASTROPHYS,W-8000 MUNICH 40,GERMANY. UNIV ROME LA SAPIENZA,I-00185 ROME,ITALY. BERG UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,W-5600 WUPPERTAL 1,GERMANY. QUEEN MARY & WESTFIELD COLL,LONDON E1 4NS,ENGLAND. INFN,ROME,ITALY. UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616. UNIV CALIF DAVIS,IIRPA,DAVIS,CA 95616. CHARLES UNIV,CTR NUCL,CS-18000 PRAGUE 8,CZECHOSLOVAKIA. UNIV LUND,DEPT PHYS,S-22362 LUND,SWEDEN. UNIV HAMBURG,INST EXPTL PHYS 1,W-2000 HAMBURG 13,GERMANY. UNIV DORTMUND,INST PHYS,W-4600 DORTMUND 50,GERMANY. UNIV PARIS 07,LPNHE,CNRS,IN2P3,F-75252 PARIS 05,FRANCE. UNIV PARIS 08,F-75252 PARIS 05,FRANCE. UNIV LANCASTER,SCH PHYS & MAT,LANCASTER LA1 4YB,ENGLAND. INST NUCL PHYS,PL-31342 KRAKOW,POLAND. CZECHOSLOVAK ACAD SCI,INST PHYS,CS-18040 PRAGUE 8,CZECHOSLOVAKIA. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305. RP AHMED, T (reprint author), UNIV BIRMINGHAM,SCH PHYS & SPACE RES,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND. RI Soloviev, Yury/M-8788-2015; Levonian, Sergey/M-8693-2015; Andreev, Vladimir/M-8665-2015; Fomenko, Alexander/I-7900-2014; Malinovski, Evgenii/N-1034-2015; Belousov, Anatoli/N-2102-2015; Vazdik, Iakov/N-2624-2015; Gorelov, Igor/J-9010-2015; Staroba, Pavel/G-8850-2014; DEVEL, Michel/A-5677-2009; Meyer, Curtis/L-3488-2014; Sheviakov, Igor/N-2735-2015; Kotelnikov, Sergey/A-9711-2014; Cvach, Jaroslav/G-6269-2014; Danilov, Mikhail/C-5380-2014 OI Soloviev, Yury/0000-0003-1136-2827; Gorelov, Igor/0000-0001-5570-0133; DEVEL, Michel/0000-0001-8785-6896; Meyer, Curtis/0000-0001-7599-3973; Sheviakov, Igor/0000-0002-1659-3483; Kotelnikov, Sergey/0000-0002-8027-4612; Danilov, Mikhail/0000-0001-9227-5164 NR 29 TC 82 Z9 83 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 JAN 28 PY 1993 VL 299 IS 3-4 BP 374 EP 384 DI 10.1016/0370-2693(93)90277-O PG 11 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KJ872 UT WOS:A1993KJ87200035 ER PT J AU AHMED, T ANDREEV, V ANDRIEU, B ARPAGAUS, M BABAEV, A BARWOLFF, H BAN, J BARANOV, P BARRELET, E BARTEL, W BASSLER, U BECK, GA BECK, HP BEHREND, HJ BELOUSOV, A BERGER, C BERGSTEIN, H BERNARDI, G BERNET, R BERTHON, U BERTRANDCOREMANS, G BESANCON, M BIDDULPH, P BINDER, E BIZOT, JC BLOBEL, V BORRAS, K BOSETTI, PC BOUDRY, V BOURDARIOS, C BRASSE, F BRAUN, U BRAUNSCHWEIG, W BRISSON, V BRUNCKO, D BURGER, J BUSSER, FW BUNIATIAN, A BURKE, S BUSCHHORN, G CAMPBELL, AJ CARLI, T CHARLES, F CLARKE, D CLEGG, AB COLOMBO, M COUGHLAN, JA COURAU, A COUTURES, C COZZIKA, G CRIEGEE, L CVACH, J DAINTON, JB DANILOV, M DANN, AWE DAU, WD DAVID, M DEFFUR, E DELCOURT, B DELBUONO, L DEVEL, M DEROECK, A DINGUS, P DOLLFUS, C DOWELL, JD DREIS, HB DRESCHER, A DUBOC, J DULLMANN, D DUNGER, O DUHM, H EBERLE, M EBERT, J EBERT, TR ECKERLIN, G EFREMENKO, V EGLI, S EICHENBERGER, S EICHLER, R EISELE, F EISENHANDLER, E ELLIS, NN ELLISON, RJ ELSEN, E ERDMANN, M EVRARD, E FAVART, L FEDOTOV, A FEEKEN, D FELST, R FELTESSE, J FENG, Y FENSOME, IF FERENCEI, J FERRAROTTO, F FLAUGER, W FLEISCHER, M FLOWER, PS FLUGGE, G FOMENKO, A FOMINYKH, B FORBUSH, M FORMANEK, J FOSTER, JM FRANKE, G FRETWURST, E FUHRMANN, P GABATHULER, E GAMERDINGER, K GARVEY, J GAYLER, J GELLRICH, A GENNIS, M GENSCH, U GENZEL, H GERHARDS, R GILLESPIE, D GODFREY, L GOERLACH, U GOERLICH, L GOLDBERG, M GOODALL, AM GORELOV, I GORITCHEV, P GRAB, C GRASSLER, H GRASSLER, R GREENSHAW, T GREIF, H GRINDHAMMER, G GRUBER, C HAACK, J HAIDT, D HAJDUK, L HAMON, O HANDSCHUH, D HANLON, EM HAPKE, M HARJES, J HARTZ, P HAYDAR, R HAYNES, WJ HEATHERINGTON, J HEDBERG, V HEDGECOCK, R HEINZELMANN, G HENDERSON, RCW HENSCHEL, H HERMA, R HERYNEK, I HILDESHEIM, W HILL, P HILTON, CD HLADKY, J HOEGER, KC HUET, P HUFNAGEL, H HUOT, N IBBOTSON, M JABIOL, MA JACHOLKOWSKA, A JACOBSSON, C JAFFRE, M JONSSON, L JOHANNSEN, K JOHNSON, DP JOHNSON, L JUNG, H KALMUS, PIP KASARIAN, S KASCHOWITZ, R KASSELMANN, P KATHAGE, U KAUFMANN, HH KENYON, IR KERMICHE, S KIESLING, C KLEIN, M KLEINWORT, C KNIES, G KOHLER, T KOLANOSKI, H KOLE, F KOLYA, SD KORBEL, V KORN, M KOSTKA, P KOTELNIKOV, SK KRASNY, MW KREHBIEL, H KRUCKER, D KRUGER, U KUBENKA, JP KUSTER, H KUHLEN, M KURCA, T KURZHOFER, J KUZNIK, B LANDER, R LANDON, MPJ LANGKAU, R LANIUS, P LAPORTE, JF LEBEDEV, A LEUSCHNER, A LEVERENZ, C LEVIN, D LEVONIAN, S LEY, C LINDNER, A LINDSTROM, G LOCH, P LOHMANDER, H LOPEZ, GC LUERS, D MAGNUSSEN, N MALINOVSKI, E MANI, S MARAGE, P MARKS, J MARSHALL, R MARTENS, J MARTIN, R MARTYN, HU MARTYNIAK, J MASSON, S MAVROIDIS, A MAXFIELD, SJ MCMAHON, SJ MEHTA, A MEIER, K MERZ, T MEYER, CA MEYER, H MEYER, J MIKOCKI, S MILONE, V MONNIER, E MOREAU, F MOREELS, J MORRIS, JV MORTON, JM MULLER, K MURIN, P MURRAY, SA NAGOVIZIN, V NAROSKA, B NAUMANN, T NEWTON, D NGUYEN, HK NIEBERGALL, F NISIUS, R NOWAK, G NOYES, GW NYBERG, M OBERLACK, H OBROCK, U OLSSON, JE ORENSTEIN, S OULDSAADA, F PASCAUD, C PATEL, GD PEPPEL, E PETERS, S PHILLIPS, HT PHILLIPS, JP PICHLER, C PILGRAM, W PITZL, D PROSI, R RAUPACH, F RAUSCHNABEL, K REIMER, P RIBARICS, P RIECH, V RIEDLBERGER, J RIETZ, M ROBERTSON, SM ROBMANN, P ROOSEN, R ROSTOVTSEV, A ROYON, C RUDOWICZ, M RUFFER, M RUSAKOV, S RYBICKI, K RYSECK, E SACTON, J SAHLMANN, N SANCHEZ, E SANKEY, DPC SAVITSKY, M SCHACHT, P SCHLEPER, P VONSCHLIPPE, W SCHMIDT, C SCHMIDT, D SCHMITZ, W SCHRODER, V SCHULZ, M SCHWIND, A SCOBEL, W SEEHAUSEN, U SELL, R SEMAN, M SEMENOV, A SHEKELYAN, V SHEVIAKOV, I SHOOSHTARI, H SIEGMON, G SIEWERT, U SIROIS, Y SKILLICORN, IO SMIRNOV, P SMITH, JR SMOLIK, L SOLOVIEV, Y SPITZER, H STAROBA, P STEENBOCK, M STEFFEN, P STEINBERG, R STEINER, H STELLA, B STEPHENS, K STIER, J STRACHOTA, J STRAUMANN, U STRUCZINSKI, W SUTTON, JP TAYLOR, RE THOMPSON, G THOMPSON, RJ TICHOMIROV, I TRENKEL, C TRUOL, P TCHERNYSHOV, V TURNAU, J TUTAS, J URBAN, L USIK, A VALKAR, S VALKAROVA, A VALLEE, C VANESCH, P VARTAPETIAN, A VAZDIK, Y VECKO, M VERRECCHIA, P VICK, R VILLET, G VOGEL, E WACKER, K WALKER, IW WALTHER, A WEBER, G WEGENER, D WEGNER, A WELLISCH, HP WILLARD, S WINDE, M WINTER, GG WOLFF, T WOMERSLEY, LA WRIGHT, AE WULFF, N YIOU, TP ZACEK, J ZAVADA, P ZEITNITZ, C ZIAEEPOUR, H ZIMMER, M ZIMMERMANN, W ZOMER, F AF AHMED, T ANDREEV, V ANDRIEU, B ARPAGAUS, M BABAEV, A BARWOLFF, H BAN, J BARANOV, P BARRELET, E BARTEL, W BASSLER, U BECK, GA BECK, HP BEHREND, HJ BELOUSOV, A BERGER, C BERGSTEIN, H BERNARDI, G BERNET, R BERTHON, U BERTRANDCOREMANS, G BESANCON, M BIDDULPH, P BINDER, E BIZOT, JC BLOBEL, V BORRAS, K BOSETTI, PC BOUDRY, V BOURDARIOS, C BRASSE, F BRAUN, U BRAUNSCHWEIG, W BRISSON, V BRUNCKO, D BURGER, J BUSSER, FW BUNIATIAN, A BURKE, S BUSCHHORN, G CAMPBELL, AJ CARLI, T CHARLES, F CLARKE, D CLEGG, AB COLOMBO, M COUGHLAN, JA COURAU, A COUTURES, C COZZIKA, G CRIEGEE, L CVACH, J DAINTON, JB DANILOV, M DANN, AWE DAU, WD DAVID, M DEFFUR, E DELCOURT, B DELBUONO, L DEVEL, M DEROECK, A DINGUS, P DOLLFUS, C DOWELL, JD DREIS, HB DRESCHER, A DUBOC, J DULLMANN, D DUNGER, O DUHM, H EBERLE, M EBERT, J EBERT, TR ECKERLIN, G EFREMENKO, V EGLI, S EICHENBERGER, S EICHLER, R EISELE, F EISENHANDLER, E ELLIS, NN ELLISON, RJ ELSEN, E ERDMANN, M EVRARD, E FAVART, L FEDOTOV, A FEEKEN, D FELST, R FELTESSE, J FENG, Y FENSOME, IF FERENCEI, J FERRAROTTO, F FLAUGER, W FLEISCHER, M FLOWER, PS FLUGGE, G FOMENKO, A FOMINYKH, B FORBUSH, M FORMANEK, J FOSTER, JM FRANKE, G FRETWURST, E FUHRMANN, P GABATHULER, E GAMERDINGER, K GARVEY, J GAYLER, J GELLRICH, A GENNIS, M GENSCH, U GENZEL, H GERHARDS, R GILLESPIE, D GODFREY, L GOERLACH, U GOERLICH, L GOLDBERG, M GOODALL, AM GORELOV, I GORITCHEV, P GRAB, C GRASSLER, H GRASSLER, R GREENSHAW, T GREIF, H GRINDHAMMER, G GRUBER, C HAACK, J HAIDT, D HAJDUK, L HAMON, O HANDSCHUH, D HANLON, EM HAPKE, M HARJES, J HARTZ, P HAYDAR, R HAYNES, WJ HEATHERINGTON, J HEDBERG, V HEDGECOCK, R HEINZELMANN, G HENDERSON, RCW HENSCHEL, H HERMA, R HERYNEK, I HILDESHEIM, W HILL, P HILTON, CD HLADKY, J HOEGER, KC HUET, P HUFNAGEL, H HUOT, N IBBOTSON, M JABIOL, MA JACHOLKOWSKA, A JACOBSSON, C JAFFRE, M JONSSON, L JOHANNSEN, K JOHNSON, DP JOHNSON, L JUNG, H KALMUS, PIP KASARIAN, S KASCHOWITZ, R KASSELMANN, P KATHAGE, U KAUFMANN, HH KENYON, IR KERMICHE, S KIESLING, C KLEIN, M KLEINWORT, C KNIES, G KOHLER, T KOLANOSKI, H KOLE, F KOLYA, SD KORBEL, V KORN, M KOSTKA, P KOTELNIKOV, SK KRASNY, MW KREHBIEL, H KRUCKER, D KRUGER, U KUBENKA, JP KUSTER, H KUHLEN, M KURCA, T KURZHOFER, J KUZNIK, B LANDER, R LANDON, MPJ LANGKAU, R LANIUS, P LAPORTE, JF LEBEDEV, A LEUSCHNER, A LEVERENZ, C LEVIN, D LEVONIAN, S LEY, C LINDNER, A LINDSTROM, G LOCH, P LOHMANDER, H LOPEZ, GC LUERS, D MAGNUSSEN, N MALINOVSKI, E MANI, S MARAGE, P MARKS, J MARSHALL, R MARTENS, J MARTIN, R MARTYN, HU MARTYNIAK, J MASSON, S MAVROIDIS, A MAXFIELD, SJ MCMAHON, SJ MEHTA, A MEIER, K MERZ, T MEYER, CA MEYER, H MEYER, J MIKOCKI, S MILONE, V MONNIER, E MOREAU, F MOREELS, J MORRIS, JV MORTON, JM MULLER, K MURIN, P MURRAY, SA NAGOVIZIN, V NAROSKA, B NAUMANN, T NEWTON, D NGUYEN, HK NIEBERGALL, F NISIUS, R NOWAK, G NOYES, GW NYBERG, M OBERLACK, H OBROCK, U OLSSON, JE ORENSTEIN, S OULDSAADA, F PASCAUD, C PATEL, GD PEPPEL, E PETERS, S PHILLIPS, HT PHILLIPS, JP PICHLER, C PILGRAM, W PITZL, D PROSI, R RAUPACH, F RAUSCHNABEL, K REIMER, P RIBARICS, P RIECH, V RIEDLBERGER, J RIETZ, M ROBERTSON, SM ROBMANN, P ROOSEN, R ROSTOVTSEV, A ROYON, C RUDOWICZ, M RUFFER, M RUSAKOV, S RYBICKI, K RYSECK, E SACTON, J SAHLMANN, N SANCHEZ, E SANKEY, DPC SAVITSKY, M SCHACHT, P SCHLEPER, P VONSCHLIPPE, W SCHMIDT, C SCHMIDT, D SCHMITZ, W SCHRODER, V SCHULZ, M SCHWIND, A SCOBEL, W SEEHAUSEN, U SELL, R SEMAN, M SEMENOV, A SHEKELYAN, V SHEVIAKOV, I SHOOSHTARI, H SIEGMON, G SIEWERT, U SIROIS, Y SKILLICORN, IO SMIRNOV, P SMITH, JR SMOLIK, L SOLOVIEV, Y SPITZER, H STAROBA, P STEENBOCK, M STEFFEN, P STEINBERG, R STEINER, H STELLA, B STEPHENS, K STIER, J STRACHOTA, J STRAUMANN, U STRUCZINSKI, W SUTTON, JP TAYLOR, RE THOMPSON, G THOMPSON, RJ TICHOMIROV, I TRENKEL, C TRUOL, P TCHERNYSHOV, V TURNAU, J TUTAS, J URBAN, L USIK, A VALKAR, S VALKAROVA, A VALLEE, C VANESCH, P VARTAPETIAN, A VAZDIK, Y VECKO, M VERRECCHIA, P VICK, R VILLET, G VOGEL, E WACKER, K WALKER, IW WALTHER, A WEBER, G WEGENER, D WEGNER, A WELLISCH, HP WILLARD, S WINDE, M WINTER, GG WOLFF, T WOMERSLEY, LA WRIGHT, AE WULFF, N YIOU, TP ZACEK, J ZAVADA, P ZEITNITZ, C ZIAEEPOUR, H ZIMMER, M ZIMMERMANN, W ZOMER, F TI OBSERVATION OF DEEP INELASTIC-SCATTERING AT LOW-X SO PHYSICS LETTERS B LA English DT Article ID QCD AB Measurements of the scattered electron energy spectrum and the differential cross sections dsigma/d log(x) and dsigma/dQ2 for inclusive neutral current deep inelastic electron-proton scattering are presented. The data were obtained with the H1 detector at HERA during its first running period in which 26.7 GeV electrons collided with 820 GeV protons. The data correspond to an integrated luminosity of 1.3 nb-1 and allow the first studies of the structure of the proton at values of x down to 10(-4) for Q2 > 5 GeV2. C1 PN LEBEDEV PHYS INST,117924 MOSCOW,RUSSIA. ETH ZURICH,INST MITTELENERGIEPHYS,CH-5232 VILLIGEN,SWITZERLAND. MOSCOW INST THEORET & EXPTL PHYS,117259 MOSCOW,RUSSIA. DESY,INST HOCHENERGIEPHYS,O-1615 ZEUTHEN,GERMANY. SLOVAK ACAD SCI,INST EXPTL PHYS,CS-04353 KOSICE,CZECHOSLOVAKIA. DESY,W-2000 HAMBURG 52,GERMANY. ULB,VUB,INTERUNIV INST HIGH ENERGIES,B-1050 BRUSSELS,BELGIUM. CTR ETUD SACLAY,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE. UNIV HAMBURG,INST EXPTL PHYS 2,W-2000 HAMBURG 50,GERMANY. UNIV KIEL,INST REINE & ANGEW KERNPHYS,W-2300 KIEL 1,GERMANY. BERG UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,W-5600 WUPPERTAL 1,GERMANY. QUEEN MARY & WESTFIELD COLL,LONDON E1 4NS,ENGLAND. INFN,ROME,ITALY. CHARLES UNIV,CTR NUCL,CS-18000 PRAGUE 8,CZECHOSLOVAKIA. UNIV DORTMUND,INST PHYS,W-4600 DORTMUND 50,GERMANY. UNIV PARIS 07,LPNHE,CNRS,IN2P3,F-75252 PARIS 05,FRANCE. UNIV PARIS 08,F-75252 PARIS 05,FRANCE. UNIV LANCASTER,SCH PHYS & MAT,LANCASTER LA1 4YB,ENGLAND. INST NUCL PHYS,PL-31342 KRAKOW,POLAND. ECOLE POLYTECH,LPNHE,CNRS,IN2P3,F-91128 PALAISEAU,FRANCE. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,ENGLAND. UNIV ZURICH,DEPT PHYS,CH-8001 ZURICH,SWITZERLAND. RHEIN WESTFAL TH AACHEN,INST PHYS 1,W-5100 AACHEN,GERMANY. UNIV MANCHESTER,DEPT PHYS,MANCHESTER M13 9PL,LANCS,ENGLAND. UNIV PARIS 11,CNRS,IN2P3,LAL,F-91405 ORSAY,FRANCE. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. RHEIN WESTFAL TH AACHEN,INST PHYS 3,W-5100 AACHEN,GERMANY. UNIV GLASGOW,DEPT PHYS & ASTRON,GLASGOW G12 8QQ,SCOTLAND. MAX PLANCK INST PHYS & ASTROPHYS,W-8000 MUNICH 40,GERMANY. UNIV ROME LA SAPIENZA,I-00185 ROME,ITALY. UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616. UNIV CALIF DAVIS,IIRPA,DAVIS,CA 95616. UNIV LUND,DEPT PHYS,S-22362 LUND,SWEDEN. UNIV HAMBURG,INST EXPTL PHYS 1,W-2000 HAMBURG 13,GERMANY. CZECHOSLOVAK ACAD SCI,INST PHYS,CS-18040 PRAGUE 8,CZECHOSLOVAKIA. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305. RP AHMED, T (reprint author), UNIV BIRMINGHAM,SCH PHYS & SPACE RES,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND. RI Staroba, Pavel/G-8850-2014; Belousov, Anatoli/N-2102-2015; Vazdik, Iakov/N-2624-2015; Gorelov, Igor/J-9010-2015; Sheviakov, Igor/N-2735-2015; DEVEL, Michel/A-5677-2009; Meyer, Curtis/L-3488-2014; Soloviev, Yury/M-8788-2015; Levonian, Sergey/M-8693-2015; Andreev, Vladimir/M-8665-2015; Fomenko, Alexander/I-7900-2014; Malinovski, Evgenii/N-1034-2015; Danilov, Mikhail/C-5380-2014; Kotelnikov, Sergey/A-9711-2014; Cvach, Jaroslav/G-6269-2014; OI Gorelov, Igor/0000-0001-5570-0133; Sheviakov, Igor/0000-0002-1659-3483; DEVEL, Michel/0000-0001-8785-6896; Meyer, Curtis/0000-0001-7599-3973; Soloviev, Yury/0000-0003-1136-2827; Danilov, Mikhail/0000-0001-9227-5164; Kotelnikov, Sergey/0000-0002-8027-4612; Erdmann, Martin/0000-0002-1653-1303 NR 25 TC 11 Z9 11 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD JAN 28 PY 1993 VL 299 IS 3-4 BP 385 EP 393 DI 10.1016/0370-2693(93)90278-P PG 9 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KJ872 UT WOS:A1993KJ87200036 ER PT J AU JELINEK, R OZKAR, S PASTORE, HO MALEK, A OZIN, GA AF JELINEK, R OZKAR, S PASTORE, HO MALEK, A OZIN, GA TI GUEST HOST INTERACTIONS IN SODIUM ZEOLITE-Y - STRUCTURAL AND DYNAMIC NA-23 DOUBLE-ROTATION NMR-STUDY OF H2O, PME3, MO(CO)6, AND MO(CO)4(PME3)2 ADSORPTION IN NA56Y SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID SOLID-STATE NMR; NUCLEAR-MAGNETIC-RESONANCE; ACID SITES; TRIMETHYLPHOSPHINE; RELAXATION; PROBE AB Na-23 double-rotation NMR (DOR) provides site-specific structural and dynamical information on guest-host interactions within sodium zeolite Y pores. Quantitative adsorption of H2O, PMe3, and Mo(CO)6 guests affects both the positions and line shapes of the N-23 resonances from specific extraframework Na+ sites. The evolution of the Na-23 DOR spectra with the progressive introduction of guest molecules allows one to probe direct ''solvation'' effects involving the Na+ cations in the larger supercages, as well as indirect effects on the Na+ cations in adjacent smaller sodalite cavities. Na-23 DOR experiments conducted at two magnetic field strengths confirm that PMe3 coadsorption in 8{Mo(CO)6}, 16{Pme3}-Na56Y, and PMe3 ligand-substitution in 8{cis-MO(CO)4(PMe3)2]-Na56Y give rise to progressive deshielding and enhanced quadrupolar interactions of the anchoring Na+ cations in the alpha-cages, relative to those of the starting material, 8{Mo(CO)6}-Na56Y. Spin-lattice relaxation measurements indicate that adsorption of PMe3 facilitates an increased motion of the Na+ cations and/or guest species inside the alpha-cages. C1 UNIV TORONTO,LASH MILLER CHEM LABS,ADV ZEOLITE MAT GRP,80 ST GEORGE ST,TORONTO M5S 1A1,ONTARIO,CANADA. LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. RI Pastore, Heloise/C-3365-2012; OI jelinek, raz/0000-0002-0336-1384 NR 25 TC 21 Z9 21 U1 1 U2 4 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 JAN 27 PY 1993 VL 115 IS 2 BP 563 EP 568 DI 10.1021/ja00055a028 PG 6 WC Chemistry, Multidisciplinary SC Chemistry GA KJ689 UT WOS:A1993KJ68900028 ER PT J AU KUBAS, GJ BURNS, CJ ECKERT, J JOHNSON, SW LARSON, AC VERGAMINI, PJ UNKEFER, CJ KHALSA, GRK JACKSON, SA EISENSTEIN, O AF KUBAS, GJ BURNS, CJ ECKERT, J JOHNSON, SW LARSON, AC VERGAMINI, PJ UNKEFER, CJ KHALSA, GRK JACKSON, SA EISENSTEIN, O TI NEUTRON STRUCTURE AND INELASTIC-NEUTRON-SCATTERING AND THEORETICAL-STUDIES OF MO(CO)(H2)[(C6D5)2PC2H4P(C6D5)2]2.4.5C6D6, A COMPLEX WITH AN EXTREMELY LOW BARRIER TO H-2 ROTATION - IMPLICATIONS ON THE REACTION COORDINATE FOR H-H CLEAVAGE TO DIHYDRIDE SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID MOLECULAR-HYDROGEN COMPLEXES; TRANSITION-METAL POLYHYDRIDES; M = FE; QUANTUM-MECHANICAL EXCHANGE; DIHYDROGEN COMPLEXES; R =; SOLID-STATE; SOLUTION EQUILIBRIUM; CHEMICAL-PROPERTIES; OXIDATIVE ADDITION AB The synthesis and characterization of derivatives of Mo(CO)(R2PC2H4PR2)2 (R = Et, i-Bu, Ph, Et-Ph) and their reactions with H-2, N2, and SO2 are reported. For R = Et and i-Bu, the H-2 oxidatively adds to give dihydrides, but for R = Ph, a eta2-H-2 complex is formed. Electronic considerations, primarily back-bonding to H-2 sigma*, are shown to be the primary cause of H-H bond cleavage. Single-crystal neutron diffraction of Mo(CO)(H2)(Ph2PC2H4PPh2)2 (as a 4.5-benzene solvate with all Ph groups deuterated) at 12 K showed the H-H bond to be oriented trans to the CO and parallel to a P-Mo-P axis, with a length close to that of free H-2 (0.74 angstrom). However, the thermal ellipsoids were very large, and inelastic neutron scattering showed that the barrier to rotation of the H-2 is the lowest yet measured, ca. 0.7 kcal/mol. These observations indicate that librational motion of the H-2 is artificially foreshortening the H-H bond length. Application of a correction procedure gave a distance of 0.80-0.85 angstrom as being more likely. Extended Huckel calculations successfully modeled the H-2 coordination and also showed a low rotational barrier (1.4 kcal/mol). Theoretical considerations suggest that the degree of distortion of the MP4 skeleton is largely responsible for the ability of the complex to bind molecular hydrogen and controls the amount of back-bonding from the metal d-orbital to H-2 sigma*. MO(CO)(H2)(Ph2PC2H4PPh2)2 is now the fourth dihydrogen complex to show an H-H neutron distance of ca. 0.82 angstrom despite widely varying ligand sets, central metals, and charges. The lack of an elongated H-H bond length or equilibrium with a dihydride tautomer, despite the apparent nearness of the H-2 to cleavage, leads to the conclusion that the reaction coordinate for oxidative addition of H2 is rather flat until relatively precipitous cleavage of the H-2. Mo(CO)(H-2)[(C6D5)2PC2H4P(C6D5)2]2.4.5C6D6 crystallizes in the space group P1BAR. The cell dimensions (X-ray, 233 K) are as follows: a = 13.038 (3) angstrom, b = 14.125 (3) angstrom, c = 19.995 (4) angstrom, alpha = 90.42 (3)degrees, gamma = 94.48 (3)degrees, gamma = 113.83 (3)degrees, Z = 2; R = 4.2%. C1 LOS ALAMOS NATL LAB,MANUEL LUJAN JR NEUTRON SCATTERING CTR,LOS ALAMOS,NM 87545. THIEL COLL,DEPT CHEM,GREENVILLE,PA 16125. UNIV PARIS 11,CHIM THEOR LAB,F-91405 ORSAY,FRANCE. RP KUBAS, GJ (reprint author), LOS ALAMOS NATL LAB,INORGAN & STRUCT CHEM GRP,INC 1,MS C346,LOS ALAMOS,NM 87545, USA. RI Eisenstein, Odile/I-1704-2016 OI Eisenstein, Odile/0000-0001-5056-0311 NR 81 TC 101 Z9 101 U1 0 U2 9 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 JAN 27 PY 1993 VL 115 IS 2 BP 569 EP 581 DI 10.1021/ja00055a029 PG 13 WC Chemistry, Multidisciplinary SC Chemistry GA KJ689 UT WOS:A1993KJ68900029 ER PT J AU SPARKS, LD MEDFORTH, CJ PARK, MS CHAMBERLAIN, JR ONDRIAS, MR SENGE, MO SMITH, KM SHELNUTT, JA AF SPARKS, LD MEDFORTH, CJ PARK, MS CHAMBERLAIN, JR ONDRIAS, MR SENGE, MO SMITH, KM SHELNUTT, JA TI METAL DEPENDENCE OF THE NONPLANAR DISTORTION OF OCTAALKYLTETRAPHENYLPORPHYRINS SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID RESONANCE RAMAN-SPECTRA; PORPHYRIN FORCE-FIELD; BACTERIUM RHODOPSEUDOMONAS-VIRIDIS; DIFFERENTIAL-OVERLAP TECHNIQUE; PHOTOSYNTHETIC REACTION CENTER; LIGHT-ABSORPTION PROPERTIES; SPIN COBALT PORPHYRINS; INTERMEDIATE NEGLECT; MOLECULAR-STRUCTURE; NICKEL OCTAETHYLPORPHYRIN AB The biological activity of porphyrins and related tetrapyrroles in proteins may be modulated by nonplanar conformational distortions; consequently, two aspects of nonplanarity have been investigated in the highly nonplanar octaalkyltetraphenylporphyrins (OATPPs). In the first part, the effect of the central metal ion (M = Ni(II), Co(II), Cu(II), Zn(II), Co(III), Fe(III)) on the conformation of the OATPP macrocycle has been determined. Crystallographic studies reveal that the sterically encumbered, nonplanar porphyrin 2,3,7,8,12,13,17,18-octaethyl-5,10,15,20-tetraphenylporphyrin (OETPP) remains sufficiently flexible to show a small decrease in nonplanarity for large metal ions. This decrease in nonplanarity for the OETPP metal complexes is predicted by using a molecular mechanics force field derived from structural and vibrational data for planar metalloporphyrins. A detailed analysis of the crystal structures of the Co(II) and Cu(II) complexes of OETPP reveals that the metal-dependent changes in bond lengths and bond angles are qualitatively similar to the changes observed for the OEP complexes. As the metal size increases, both OEPs and OETPPs exhibit expansion of the meso bridges (increases in the C(alpha)-C(m) bond length and the C(alpha)-C(m)-C(alpha) bond angle) and a movement of the coordinating nitrogen atoms away from the metal atom (increases in the M-N bond length and the C(alpha)-N-C(alpha) bond angle and a decrease in the N-C(alpha) bond length). Furthermore, the frequencies of several structure-sensitive Raman lines correlate with structural parameters obtained from these crystallographic studies. In the second part, a combination of molecular mechanics and INDO/CI molecular orbital calculations successfully predicts the optical spectra of a series of highly substituted OATPPs with increasing nonplanar distortion. The success of these calculations indicates the importance of including both the macrocycle conformation and the peripheral substituents in the INDO calculations. C1 UNIV CALIF DAVIS, DEPT CHEM, DAVIS, CA 95616 USA. SANDIA NATL LABS, DEPT FUEL SCI, ALBUQUERQUE, NM 87185 USA. UNIV NEW MEXICO, DEPT CHEM, ALBUQUERQUE, NM 87131 USA. RI Shelnutt, John/A-9987-2009; Senge, Mathias/F-1504-2011; Medforth, Craig/D-8210-2013; REQUIMTE, FMN/M-5611-2013; REQUIMTE, UCIBIO/N-9846-2013; Smith, Kevin/G-1453-2011 OI Shelnutt, John/0000-0001-7368-582X; Senge, Mathias/0000-0002-7467-1654; Medforth, Craig/0000-0003-3046-4909; Smith, Kevin/0000-0002-6736-4779 NR 77 TC 266 Z9 272 U1 3 U2 31 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 JAN 27 PY 1993 VL 115 IS 2 BP 581 EP 592 DI 10.1021/ja00055a030 PG 12 WC Chemistry, Multidisciplinary SC Chemistry GA KJ689 UT WOS:A1993KJ68900030 ER PT J AU MATSUOKA, S YAMAMOTO, K OGATA, T KUSABA, M NAKASHIMA, N FUJITA, E YANAGIDA, S AF MATSUOKA, S YAMAMOTO, K OGATA, T KUSABA, M NAKASHIMA, N FUJITA, E YANAGIDA, S TI EFFICIENT AND SELECTIVE ELECTRON MEDIATION OF COBALT COMPLEXES WITH CYCLAM AND RELATED MACROCYCLES IN THE P-TERPHENYL-CATALYZED PHOTOREDUCTION OF CO2 SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID VISIBLE-LIGHT IRRADIATION; CARBON-DIOXIDE ACTIVATION; ELECTROCATALYTIC REDUCTION; ELECTROCHEMICAL REDUCTION; PHOTOCHEMICAL REDUCTION; HOMOGENEOUS CATALYSIS; BIFUNCTIONAL ACTIVATION; POLYPYRIDINE COMPLEXES; NICKEL(II) CYCLAM; AQUEOUS-SOLUTION AB Cobalt(III) complexes of cyclam (cyclam (L1) = 1,4,8,11-tetraazacyclotetradecane) (Co(III)L1) or related 14-membered tetraazamacrocycles (L2-L8) modiate electron transfer in the photoreduction of CO2 with p-terphenyl (OPP-3) as a photocatalyst and tertiary amines as sacrificial electron donors in methanolic acetonitrile. Tertiary amines (e.g., triethylamine (TEA)) used as electron donors play an important role in the electron mediation of Co(III)L1 through coordination, and the mediation of the amine-coordinatod Co(III)L1 suppresses the degradative and competitive photo-Birch reduction of OPP-3 and enhances the activity of OPP-3, leading to efficient and selective formation of both carbon monoxide (CO) and formate (HCO2-) without producing much H-2. The degradation of OPP-3 is mostly suppressed in the presence of beta-hydroxylated tertiary amines such as triethanolamine (TEOA) and tri-2-propanolamine (TIPOA), leading to much more efficient and selective production of CO and HCO2-. The total quantum yield of CO and HCO2- is 0.25 at 313 nm in the presence of TEOA. Preferential electron transfer from the photoformed radical anion of OPP-3 (OPP-3.-) to the TEA-coordinated Co(III)L1, [Co(III)L1(TEA)2]3+, is confirmed by the quenching of OPP-3.- by [Co(III)L1(TEA)2]3+ with a diffusion-controlled rate (k(s) = 1.1 x 10(10) M-1 s-1). Successive reduction of [Co(II)L1(TEA)]2+ by OPP-3.- results in the formation of [Co(I)L1]+. [Co(I)L1]+ can react with CO2 to give [Co(I)L1(CO2)]+ or react with a proton to give a d6 hydride [Co(III)L1(H-)(TEA)]2+. The extensive charge transfer from metal to bound CO2 and the coordination of tertiary amines may lead to the formation of d6 complexes like [Co(III)L1(CO22-)(TEA)]+, which may react with an electron from OPP-3.- or Co(I) species to form CO, OH-, and Co(II) species such as [Co(II)L1(TEA)]2+. As for the mechanism for the formation of HCO2-, the insertion of CO2 into intermediary hydride complexes such as [Co(III)L1(H-)(TEA)]2+ derived from [Co(I)L1]+ and H+ is proposed. The structural and electrochemical properties of cobalt complexes of the 14-membered tetraazamacrocycles investigated (L2-L8) are also discussed in view of the distribution of the reduction products of CO, HCO2-, and H-2. C1 OSAKA UNIV, FAC ENGN, INST LASER ENGN, SUITA, OSAKA 565, JAPAN. BROOKHAVEN NATL LAB, DEPT CHEM, UPTON, NY 11973 USA. RI Fujita, Etsuko/D-8814-2013 NR 89 TC 130 Z9 132 U1 8 U2 69 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD JAN 27 PY 1993 VL 115 IS 2 BP 601 EP 609 DI 10.1021/ja00055a032 PG 9 WC Chemistry, Multidisciplinary SC Chemistry GA KJ689 UT WOS:A1993KJ68900032 ER PT J AU JAMNIK, B VLACHY, V AF JAMNIK, B VLACHY, V TI MONTE-CARLO AND POISSON-BOLTZMANN STUDY OF ELECTROLYTE EXCLUSION FROM CHARGED CYLINDRICAL MICROPORES SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID ELECTRICAL DOUBLE-LAYERS; ELECTROKINETIC FLOW; PRIMITIVE MODEL; EQUATION; MEMBRANES; CAPILLARY; SURFACES; FORCES AB The exclusion of model electrolytes from charged cylindrical capillaries is studied using the grand canonical Monte Carlo method and the Poisson-Boltzmann equation. Concentration profiles inside the capillary, Donnan exclusion coefficients, and particle number fluctuations were evaluated for 2:1 (divalent co-ions, monovalent counterions) electrolytes and 1:2 electrolytes (monovalent co-ions, divalent counterions) in the restrictive primitive model approximation for a range of electrolyte concentrations and surface charge densities. The Poisson-Boltzmann equation appears to be a good approximation for 2:1 electrolytes (monovalent counterions) but breaks down completely for 1:2 (divalent counterions) electrolytes in the capillary. The Donnan exclusion coefficient GAMMA is not an increasing function of the surface charge density, as predicted by the Poisson-Boltzmann equation; rather, it passes through a maximum and decreases with further increase in the surface charge. The same behavior has been observed previously for 2:2 electrolytes. The concentration fluctuations in the capillary, studied for the first time in this work, are much smaller than in the bulk electrolyte solution due to the strong correlations in the electrical double layer. As expected, the concentration fluctuations decrease by increasing the charge on the surface. Finally, a more realistic electrolyte model which fits bulk properties of lithium and cesium chloride solutions very well has also been studied as a function of the surface charge in the capillary. The differences in the electrolyte exclusion between lithium and cesium salt can be explained in view of the short-range forces due to the restructing of water molecules around the ions. C1 UNIV LJUBLJANA,DEPT CHEM,YU-61000 LJUBLJANA,SLOVENIA. LAWRENCE BERKELEY LAB,DEPT CHEM ENGN,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. NR 45 TC 39 Z9 39 U1 2 U2 7 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 JAN 27 PY 1993 VL 115 IS 2 BP 660 EP 666 DI 10.1021/ja00055a040 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA KJ689 UT WOS:A1993KJ68900040 ER PT J AU SHADLE, SE PENNERHAHN, JE SCHUGAR, HJ HEDMAN, B HODGSON, KO SOLOMON, EI AF SHADLE, SE PENNERHAHN, JE SCHUGAR, HJ HEDMAN, B HODGSON, KO SOLOMON, EI TI X-RAY ABSORPTION SPECTROSCOPIC STUDIES OF THE BLUE COPPER SITE - METAL AND LIGAND K-EDGE STUDIES TO PROBE THE ORIGIN OF THE EPR HYPERFINE SPLITTING IN PLASTOCYANIN SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID ELECTRONIC-STRUCTURE; SPECTRAL FEATURES; SINGLE-CRYSTALS; ACTIVE-SITE; COORDINATION; COMPLEX; STATE; ION; STELLACYANIN; NITROGENASE AB X-ray absorption spectra for the oxidized blue copper protein plastocyanin and several Cu(II) model complexes have been measured at both the Cu K-edge and the ligand K-edges (Cl and S) in order to elucidate the source of the small parallel hyperfine splitting in the EPR spectra of blue copper centers. Assignment and analysis of a feature in the Cu K-edge X-ray absorption spectrum at approximately 8987 eV as the Cu 1s --> 4p + ligand-to-metal charge-transfer shakedown transition has allowed for quantitation of 4p mixing into the ground-state wave function as reflected in the 1s --> 3d (+4p) intensity at approximately 8979 eV. The results show that distorted tetrahedral (D2d) CuCl42- is characterized by <4% Cu 4p(z) mixing, while plastocyanin has only Cu 4p(xy) mixing. Thus, the small parallel hyperfine splitting in the EPR spectra of D2d CuCl42- and of oxidized plastocyanin cannot be explained by 12% 4p(z) mixing into the 3d(x2-y2) orbital as had been previously postulated. Data collected at the Cl K-edge for CuCl42- show that the intensity of the ligand pre-edge feature at approximately 2820 eV reflects the degree of covalency between the metal half-occupied orbital and the ligands. The data show that D2d CuCl42- is not unusually covalent. The source of the small parallel splitting in the EPR of D2d CuCl42- is discussed. Experiments at the S K-edge (approximately 2470 eV) show that plastocyanin is characterized by a highly covalent Cu-S(cysteine) bond relative to the cupric-thiolate model complex [Cu(tet b)(o-SC6H4CO2)].H2O. Self-consistent-field-Xalpha-scattered-wave calculations have been used to understand copper-thiolate bonding in this model complex and to quantify the covalency reflected in the S K-edge intensity data. The XAS results demonstrate that the small parallel hyperfine splitting in the EPR spectra of blue copper sites reflects the high degree of covalency of the copper-thiolate bond. C1 STANFORD UNIV,STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94305. STANFORD UNIV,DEPT CHEM,STANFORD,CA 94305. OI Penner-Hahn, James/0000-0003-0314-1274 NR 57 TC 229 Z9 229 U1 3 U2 40 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 JAN 27 PY 1993 VL 115 IS 2 BP 767 EP 776 DI 10.1021/ja00055a057 PG 10 WC Chemistry, Multidisciplinary SC Chemistry GA KJ689 UT WOS:A1993KJ68900057 ER PT J AU LIGHTWAHL, KJ SPRINGER, DL WINGER, BE EDMONDS, CG CAMP, DG THRALL, BD SMITH, RD AF LIGHTWAHL, KJ SPRINGER, DL WINGER, BE EDMONDS, CG CAMP, DG THRALL, BD SMITH, RD TI OBSERVATION OF A SMALL OLIGONUCLEOTIDE DUPLEX BY ELECTROSPRAY IONIZATION MASS-SPECTROMETRY SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Note ID COMPLEXES C1 PACIFIC NW LAB, DEPT CHEM SCI, RICHLAND, WA 99352 USA. PACIFIC NW LAB, DEPT BIOL & CHEM, RICHLAND, WA 99352 USA. EASTERN OREGON STATE COLL, SCI OFF, LA GRANDE, OR 97850 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 14 TC 165 Z9 165 U1 0 U2 4 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 JAN 27 PY 1993 VL 115 IS 2 BP 803 EP 804 DI 10.1021/ja00055a070 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA KJ689 UT WOS:A1993KJ68900070 ER PT J AU CHANG, CS YAMAZAKI, I SINCLAIR, R KHALID, S POWERS, L AF CHANG, CS YAMAZAKI, I SINCLAIR, R KHALID, S POWERS, L TI PH-DEPENDENCE OF THE ACTIVE-SITE OF HORSERADISH-PEROXIDASE COMPOUND-II SO BIOCHEMISTRY LA English DT Article ID X-RAY ABSORPTION; IV=O STRETCHING VIBRATION; RESONANCE RAMAN EVIDENCE; HEME-LINKED IONIZATION; IRON PORPHYRINS; FINE-STRUCTURE; HEMOGLOBIN COOPERATIVITY; FERRYL MYOGLOBIN; OXYGEN-EXCHANGE; BULK WATER AB Using X-ray absorption spectroscopy, we investigated the active site of horseradish peroxidase (HRP) compound II at two different pH values. The results indicate that the bond length of the sixth coordinated ligand of the active site was 1.90 +/- 0.02 angstrom at pH 7, decreasing to 1.72 +/- 0.02 angstrom at pH 10. The average iron-to-pyrrole nitrogen and the proximal ligand bond lengths showed no significant changes. The position of higher coordination shells around the iron center changed, implying that some movement or deformation of nearby amino acid residues and/or of the heme occurred. Results of this study suggest that the decrease of the Fe-O bond length of HRP compound II at the higher pH might be attributed to the loss of a hydrogen bond which is present between the oxygen ligand and an amino acid residue in the heme pocket at pH 7. C1 UTAH STATE UNIV,NATL CTR DESIGN MOLEC FUNCT,LOGAN,UT 84322. BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE,UPTON,NY 11973. FU NIEHS NIH HHS [ES 04922] NR 51 TC 36 Z9 38 U1 0 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD JAN 26 PY 1993 VL 32 IS 3 BP 923 EP 928 DI 10.1021/bi00054a025 PG 6 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA KJ644 UT WOS:A1993KJ64400025 PM 8422396 ER PT J AU GUPTA, G GARCIA, AE HIRIYANNA, KT AF GUPTA, G GARCIA, AE HIRIYANNA, KT TI SAMPLING OF THE CONFORMATIONS OF THE D(CGCTGCGGC) HAIRPIN IN SOLUTION BY 2-DIMENSIONAL NUCLEAR-MAGNETIC-RESONANCE AND THEORETICAL METHODS SO BIOCHEMISTRY LA English DT Article ID DNA HAIRPIN; BASE-SEQUENCE; TRANSITIONS; LOOP; REPLICATION; ENERGETICS; DODECAMER; DYNAMICS; GEOMETRY; BEHAVIOR AB Most NMR studies of DNA oligomers have focused on rigid structures that show a strong preference for one or a small set of ground-state conformations. There is an increasing interest in extending NMR methods to investigate DNA systems in which this preference does not exist. A DNA hairpin is one such system where a large number of low-energy structures coexist in solution. In this article we show how 1D/2D NMR data of the d(C1-G2-C3-T4-G5-C6-G7-G8-C9) hairpin are used to map the conformational space of this molecule. First, we characterize the gross morphology of the hairpin by monitoring the exchangeable imino signals in the molecule. Second, we extract a set of inter-proton distances (i.e., the average values and the associated dispersions) for various pairwise interactions by performing full-matrix NOESY simulation with respect to the observed NOESY data for mixing times of 250 and 100 ms. Third, we use these distances as structural constraints to perform a 300-ps molecular dynamics simulation at 500 K. Fourth, we extract 600 snapshots (one after every 0.5 ps) from the MD trajectory and perform constrained energy minimization to map local minima on the sampled energy surface (we call this the rapid temperature quenching step). Fifth, we assign 600 structures to 14 disjoint clusters such that conformationally similar hairpins belong to the same cluster while conformationally distinct hairpins belong to different clusters. Finally, we interpret the NOESY data in terms of conformationally distinct structures by recalculating NOESY contributions taken from representative structures of different clusters. Our analyses clearly demonstrate that the NMR data correspond to an ensemble of distinct structures, i.e., a set of energetically stable but conformationally distinct structures that satisfies the constraints of loop folding in the d(C1-G2-C3-T4-G5-C6-G7-G8-C9) hairpin. Two types of loop folding consistent with NMR data are obtained: (i) a hairpin with two G.C pairs in the stem and four residues in the loop and (ii) a hairpin with two G-C pairs and a reverse wobble G-T pair in the stem plus two residues in the loop. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT ZOOL,AMES,IA 50011. RP GUPTA, G (reprint author), LOS ALAMOS NATL LAB,COLL THEORET,THEORET BIOL & BIOPHYS GRP T10,ADV COMP LAB,LOS ALAMOS,NM 87545, USA. NR 38 TC 21 Z9 21 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD JAN 26 PY 1993 VL 32 IS 3 BP 948 EP 960 DI 10.1021/bi00054a028 PG 13 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA KJ644 UT WOS:A1993KJ64400028 PM 8422398 ER PT J AU FENG, ZC KWAK, BS ERBIL, A BOATNER, LA AF FENG, ZC KWAK, BS ERBIL, A BOATNER, LA TI DIFFERENCE RAMAN-SPECTRA OF PBTIO3 THIN-FILMS GROWN BY METALORGANIC CHEMICAL VAPOR-DEPOSITION SO APPLIED PHYSICS LETTERS LA English DT Article ID SPECTROSCOPY; MODES AB The technique of Raman scattering has been used to investigate the properties of ferroelectric PbTiO3 thin films grown on both single-crystal KTaO3 and fused quartz substrates by means of metalorganic chemical vapor deposition. The ''difference Raman'' technique, was employed in which substrate contributions were subtracted in order to obtain Raman spectra for the PbTiO3 films. A comparison of the Raman spectra taken at 300 and 80 K for PbTiO3 and KTaO3 reveals two different types of temperature behavior and these effects are accounted for by the soft-mode theory. C1 EMORY UNIV,DEPT PHYS,ATLANTA,GA 30322. GEORGIA INST TECHNOL,SCH PHYS,ATLANTA,GA 30332. OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. GEORGIA INST TECHNOL,SCH PHYS,ATLANTA,GA 30332. RI Boatner, Lynn/I-6428-2013 OI Boatner, Lynn/0000-0002-0235-7594 NR 20 TC 22 Z9 23 U1 0 U2 5 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 JAN 25 PY 1993 VL 62 IS 4 BP 349 EP 351 DI 10.1063/1.108954 PG 3 WC Physics, Applied SC Physics GA KJ343 UT WOS:A1993KJ34300009 ER PT J AU CHASON, E MAYER, TM AF CHASON, E MAYER, TM TI LOW-ENERGY ION-BOMBARDMENT INDUCED ROUGHENING AND SMOOTHING OF SIO2 SURFACES SO APPLIED PHYSICS LETTERS LA English DT Article ID GROWTH AB Surface roughening and smoothing of SiO2 by low energy ion bombardment were investigated using in situ energy dispersive x-ray reflectivity. Bombardment of nominally smooth surfaces (initial roughness approx. 0.4 nm) by 1 keV Xe increases the surface roughness linearly with fluence. Bombardment of initially rough surfaces (roughness approx. 1 nm) by 0.2-1 keV H results in an exponential decrease in roughness with fluence at a rate that increases with energy. The smoothing rate has a different energy dependence than the etching rate, ruling out a simple relation between material removal and surface morphology. A H ion induced relaxation mechanism is suggested for the smoothing behavior. RP CHASON, E (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 12 TC 44 Z9 44 U1 0 U2 5 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 JAN 25 PY 1993 VL 62 IS 4 BP 363 EP 365 DI 10.1063/1.108957 PG 3 WC Physics, Applied SC Physics GA KJ343 UT WOS:A1993KJ34300014 ER PT J AU NORTON, DP BUDAI, JD CHAKOUMAKOS, BC FEENSTRA, R AF NORTON, DP BUDAI, JD CHAKOUMAKOS, BC FEENSTRA, R TI EPITAXIAL-GROWTH OF BA1-XKXBIO3 THIN-FILMS BY PULSED-LASER DEPOSITION SO APPLIED PHYSICS LETTERS LA English DT Article ID MOLECULAR-BEAM EPITAXY; SUPERCONDUCTING (RB,BA)BIO3; JUNCTIONS; SYSTEM AB Epitaxial Ba1-xKxBiO3 thin films have been grown by pulsed-laser deposition at temperatures as low as 400-degrees-C. Films have been grown on (100) MgO and SrTiO3 with T(c)(R = 0) = 19.5 K and transition widths less than 1 K. Four circle x-ray diffraction shows that these epitaxial films are mostly (00l) oriented with good in-plane epitaxy. We find that, especially for growth on (100) MgO, an initial epitaxial layer of BaBiO3 grown at 600-degrees-C significantly improves the properties of the Ba1-xKxBiO3 films. RP NORTON, DP (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,POB 2008,OAK RIDGE,TN 37831, USA. RI Chakoumakos, Bryan/A-5601-2016; Budai, John/R-9276-2016 OI Chakoumakos, Bryan/0000-0002-7870-6543; Budai, John/0000-0002-7444-1306 NR 18 TC 11 Z9 11 U1 2 U2 13 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 JAN 25 PY 1993 VL 62 IS 4 BP 414 EP 416 DI 10.1063/1.108919 PG 3 WC Physics, Applied SC Physics GA KJ343 UT WOS:A1993KJ34300031 ER PT J AU WILLIAMS, PT AF WILLIAMS, PT TI HIGH-DENSITY-LIPOPROTEINS AND LIPASE ACTIVITY IN RUNNERS SO ATHEROSCLEROSIS LA English DT Letter DE EXERCISE; HIGH-DENSITY LIPOPROTEINS; LIPASES; MUSCLE; ADIPOSITY ID LONG-DISTANCE RUNNERS; SET-POINT THEORY; WEIGHT-LOSS; SKELETAL-MUSCLE; EXERCISE; CHOLESTEROL; MEN RP WILLIAMS, PT (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 11 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0021-9150 J9 ATHEROSCLEROSIS JI Atherosclerosis PD JAN 25 PY 1993 VL 98 IS 2 BP 251 EP 252 DI 10.1016/0021-9150(93)90134-G PG 2 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA KM263 UT WOS:A1993KM26300012 PM 8457264 ER PT J AU WEMMER, DE WEDEMAYER, GJ GLAZER, AN AF WEMMER, DE WEDEMAYER, GJ GLAZER, AN TI PHYCOBILINS OF CRYPTOPHYCEAN ALGAE - NOVEL LINKAGE OF DIHYDROBILIVERDIN IN A PHYCOERYTHRIN-555 AND A PHYCOCYANIN-645 SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID CHROOMONAS SP CRYPTOPHYCEAE; CRYPTOMONAD BILIPROTEIN; I PHYCOERYTHRIN; ENERGY-TRANSFER; MULTIPLE FORMS; ALPHA-SUBUNITS; C-PHYCOCYANIN; ATTACHMENT; DIVERSITY; SEQUENCE AB Cryptomonad strain IVF2 phycoerythrin 555 carries phycoerythrobilins attached through single thioether bonds at alpha-Cys-18, beta-Cys-82, and beta-Cys-158 and a doubly linked 15,16-dihydrobiliverdin (DBV) at beta-DiCys-50,61 (for sequence numbering, see Sidler, W., Nutt, H., Kumpf, B., Frank, G., Suter, F., Brenzel, A., Wehrmeyer, W., and Zuber, H. (1990) Biol. Chem. Hoppe-Seyler 371, 573-547). Analysis of the beta-DiCys-50,61-linked DBV by H-1 homonuclear and H-1-C-13 heteronuclear NMR spectroscopy establishes that the thioether bond from Cys-50 is to the 3''-carbon of the DBV ring A and that from Cys-61 is to the 18'-carbon of ring D, i.e. the peptide-linked bilin is an 8,12-bis(2-carboxyethyl)-3-(2-(cysteinyl-S)-ethyl)-18-(1-(cysteinyl-S)-ethyl)-2,,7,13,17-tetramethylbiladiene-ab-1,19(16H, 21H)-dione. DBV is also present at beta-DiCys-50,61 in cryptomonad strain UW374 phycocyanin 645 (Wedemayer, G. J., Kidd, D. G., Wemmer, D. E., and Glazer, A. N. (1992) J. Biol. Chem. 267, 7315-7331). NMR spectroscopy shows that the thioether bonds to this DBV are also at 3'' and 18'. Linkage of tetrapyrroles to polypeptides through the 3''-carbon has not hitherto been reported. C1 UNIV CALIF BERKELEY,DEPT MOLEC & CELL BIOL,DIV BIOCHEM & MOLEC BIOL,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DEPT CHEM,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV CHEM BIODYNAM,BERKELEY,CA 94720. FU NIGMS NIH HHS [GM28994] NR 43 TC 19 Z9 21 U1 0 U2 1 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 JAN 25 PY 1993 VL 268 IS 3 BP 1658 EP 1669 PG 12 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA KH620 UT WOS:A1993KH62000026 PM 8420941 ER PT J AU CAMPION, SR GECK, MK NIYOGI, SK AF CAMPION, SR GECK, MK NIYOGI, SK TI CUMULATIVE EFFECT OF DOUBLE-SITE MUTATIONS OF HUMAN EPIDERMAL GROWTH-FACTOR ON RECEPTOR-BINDING SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID NUCLEAR-MAGNETIC-RESONANCE; TYROSINE KINASE-ACTIVITY; DIRECTED MUTAGENESIS; PROTEIN; H-1-NMR; LEUCINE-47; DOMAIN; EGF AB Using site-directed mutagenesis, it was previously found that mutation of the individual residues Tyr13, Tyr22, Ile23, or Leu26 in the amino-terminal domain or of the highly conserved Leu47 in the carboxyl-terminal domain of human epidermal growth factor (hEGF), resulted in significantly decreased receptor binding affinity. In the present study, the single-site hEGF mutants Tyr13 --> His, Tyr22 --> Asp, Ile23 --> Thr, and Leu26 --> Gly were genetically combined with the Leu47 --> Ala hEGF mutant to produce a series of double-site mutant hEGF gene products having alterations simultaneously at two sites, in separate domains, within the same hEGF molecule. Similarly, the combination of the single-site hEGF mutants Tyr13 --> His and Ile23 --> Thr generated a double-site mutant having two mutations within the same domain. Finally, combination of the hEGF mutation Ile23 --> Ala with Leu26 --> Ala altered two side chains located in close proximity within the large beta-sheet region of the molecule. Analysis of the relative receptor binding affinities, determined by radioreceptor competition assays of the various single- and double-site hEGF mutants, demonstrated that mutation at any one site does not substantially alter the effect of mutation at the second site in the molecule. The cumulative effect of simultaneous mutations on relative receptor binding affinity confirms the importance of residues, including those in the large amino-terminal beta-sheet, in receptor binding, and indicates that each of the separate sites functions essentially independently in the interaction of the hEGF molecule with its receptor. C1 UNIV TENNESSEE,OAK RIDGE GRAD SCH BIOMED SCI,DIV BIOL,OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,PROT ENGN & MOLEC MUTAGENESIS PROGRAM,OAK RIDGE,TN 37831. FU NCI NIH HHS [CA 50735] NR 30 TC 26 Z9 26 U1 0 U2 2 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 JAN 25 PY 1993 VL 268 IS 3 BP 1742 EP 1748 PG 7 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA KH620 UT WOS:A1993KH62000038 PM 8380576 ER PT J AU SVOBODA, DL TAYLOR, JS HEARST, JE SANCAR, A AF SVOBODA, DL TAYLOR, JS HEARST, JE SANCAR, A TI DNA-REPAIR BY EUKARYOTIC NUCLEOTIDE EXCISION NUCLEASE - REMOVAL OF THYMINE DIMER AND PSORALEN MONOADDUCT BY HELA CELL-FREE-EXTRACT AND OF THYMINE DIMER BY XENOPUS-LAEVIS OOCYTES SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID SOLID-PHASE SYNTHESIS; PYRIMIDINE DIMER; BUILDING BLOCK; LESIONS; OLIGONUCLEOTIDES; EXONUCLEASE; STRAND; ENZYME; SITE AB Using a human cell-free extract, we have recently shown that thymine dimers are removed from DNA in oligonucleotides 27-29 nucleotides in length (Huang, J. C., Svoboda, D. L., Reardon, J. T., and Sancar, A. (1992) Proc. Natl. Acad. Sci. U. S. A. 89, 3664-3668). In this study we find that the excision reaction is dependent on ATP, the excised fragments range in length from 27-32 nucleotides, and have 5'-P and 3'-OH termini. We also found that a thymine-psoralen furan side monoadduct is excised from the DNA with a similar incision pattern, indicating that in humans bulky adducts are removed from DNA by the same enzyme system which hydrolyzes mainly the 22-24th and the 5th phosphodiester bonds 5' and 3', respectively, to the lesion. This incision pattern might be common to eukaryotic excision nucleases as thymine dimers were removed from DNA by the same dual incision pattern by Xenopus laevis oocytes. C1 WASHINGTON UNIV, DEPT CHEM, ST LOUIS, MO 63130 USA. LAWRENCE BERKELEY LAB, DIV CHEM BIODYNAM, BERKELEY, CA 94720 USA. RP SVOBODA, DL (reprint author), UNIV N CAROLINA, SCH MED, DEPT BIOCHEM & BIOPHYS, CHAPEL HILL, NC 27599 USA. FU NIGMS NIH HHS [GM32833] NR 30 TC 107 Z9 109 U1 0 U2 3 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD JAN 25 PY 1993 VL 268 IS 3 BP 1931 EP 1936 PG 6 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA KH620 UT WOS:A1993KH62000066 PM 8420966 ER PT J AU GULMEZ, E LING, AG WHITTEN, CA MCNAUGHTON, MW ADAMS, DL CUPPS, VR GLASS, G SIMON, AJ MCNAUGHTON, KH AF GULMEZ, E LING, AG WHITTEN, CA MCNAUGHTON, MW ADAMS, DL CUPPS, VR GLASS, G SIMON, AJ MCNAUGHTON, KH TI ABSOLUTE DIFFERENTIAL CROSS-SECTION MEASUREMENTS FOR P+P-]PI(+)+D REACTION AT 500-800 MEV SO NUCLEAR PHYSICS A LA English DT Article DE H-1(P, PI(+)); E = 492; 576; 642; 728; 793 MEV; MEASURED SIGMA(THETA); LIQUID H-2 TARGET; SCINTILLATOR BEAM-COUNTING SYSTEM; WIRE-CHAMBER DETECTORS; 2 ARMS ID ANALYZING POWER; ENERGIES AB Absolute differential cross sections for the reaction p + p --> pi+ + d were measured at 491.9, 575.5, 641.6, 728.2 and 793.0 MeV. These measurements covered an angular range from 50-degrees to 120-degrees in c.m. except for the 491.9 MeV case, where the angular range was approximately 70-degrees - approximately 105-degrees in c.m. The beam intensity was measured by counting the individual beam particles using a scintillator beam-counting system. The typical accuracy for the beam counting was approximately 0.1%. The uncertainty in the target length was about half a percent or lower. The overall uncertainty in the differential cross-section measurement was 1.5-2.5%, including the total systematic and statistical uncertainties. The results were compared with the existing data. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RICE UNIV,HOUSTON,TX 77251. RUTGERS STATE UNIV,NEW BRUNSWICK,NJ 08903. TEXAS A&M UNIV SYST,COLL STN,TX 77843. UNIV TEXAS,AUSTIN,TX 78712. RP GULMEZ, E (reprint author), UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024, USA. RI Gulmez, Erhan/P-9518-2015 OI Gulmez, Erhan/0000-0002-6353-518X NR 16 TC 3 Z9 3 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 JAN 25 PY 1993 VL 551 IS 4 BP 621 EP 636 DI 10.1016/0375-9474(93)90269-4 PG 16 WC Physics, Nuclear SC Physics GA KN026 UT WOS:A1993KN02600004 ER PT J AU KNOX, L TURNER, MS AF KNOX, L TURNER, MS TI INFLATION AT THE ELECTROWEAK SCALE SO PHYSICAL REVIEW LETTERS LA English DT Article ID MAGNETIC MONOPOLES; CHAOTIC INFLATION; SYMMETRY-BREAKING; UNIVERSE; BARYOGENESIS; COSMOLOGY; FLATNESS; HORIZON; ORIGIN; MODEL AB We present a model for slow-rollover inflation where the vacuum energy that drives inflation is of the order of G(F)-2; unlike most models, the conversion of vacuum energy to radiation (''reheating'') is moderately efficient. The scalar field responsible for inflation is a standard-model singlet, develops a vacuum expectation value of 4 x 10(6) GeV, has a mass of about 1 GeV, and can play a role in electroweak phenomena. We also discuss models where the energy scale of inflation is somewhat larger, but still well below the unification scale. C1 FERMILAB NATL ACCELERATOR LAB,NASA,FERMILAB ASTROPHYS CTR,FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV CHICAGO,ENRICO FERMI INST,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637. RP KNOX, L (reprint author), UNIV CHICAGO,DEPT PHYS,CHICAGO,IL 60637, USA. NR 38 TC 49 Z9 49 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 25 PY 1993 VL 70 IS 4 BP 371 EP 374 DI 10.1103/PhysRevLett.70.371 PG 4 WC Physics, Multidisciplinary SC Physics GA KH615 UT WOS:A1993KH61500003 ER PT J AU ANTONIAZZI, L ARENTON, M CAO, Z CHEN, T CONETTI, S COX, B DELCHAMPS, S FORTNEY, L GUFFEY, K HAIRE, M IAONNOU, P JENKINS, CM JUDD, DJ KOURKOUMELIS, C MANOUSAKISKATSIKAKIS, A KUZMINSKI, J LECOMPTE, T MARCHIONNI, A HE, M MAZUR, PO MURPHY, CT PRAMANTIOTIS, P RAMEIKA, R RESVANIS, LK ROSATI, M ROSEN, J SHEN, C SHEN, Q SIMARD, A SMITH, RP SPIEGEL, L STAIRS, DG TAN, Y TESAREK, RJ TURKINGTON, T TURNBULL, L TURKOT, F TZAMARIAS, S VOULGARIS, G WAGONER, DE WANG, C YANG, W YAO, N ZHANG, N ZHANG, X ZIOULAS, G ZOU, B AF ANTONIAZZI, L ARENTON, M CAO, Z CHEN, T CONETTI, S COX, B DELCHAMPS, S FORTNEY, L GUFFEY, K HAIRE, M IAONNOU, P JENKINS, CM JUDD, DJ KOURKOUMELIS, C MANOUSAKISKATSIKAKIS, A KUZMINSKI, J LECOMPTE, T MARCHIONNI, A HE, M MAZUR, PO MURPHY, CT PRAMANTIOTIS, P RAMEIKA, R RESVANIS, LK ROSATI, M ROSEN, J SHEN, C SHEN, Q SIMARD, A SMITH, RP SPIEGEL, L STAIRS, DG TAN, Y TESAREK, RJ TURKINGTON, T TURNBULL, L TURKOT, F TZAMARIAS, S VOULGARIS, G WAGONER, DE WANG, C YANG, W YAO, N ZHANG, N ZHANG, X ZIOULAS, G ZOU, B TI PRODUCTION OF J/PSI VIA PSI' AND CHI DECAY IN 300-GEV/C PROTON-NUCLEON AND PI+/--NUCLEON INTERACTIONS SO PHYSICAL REVIEW LETTERS LA English DT Article ID HADRONIC PRODUCTION; RADIATIVE DECAY; GEV POSITRONS; COLLISIONS; CHI-1++(3507); CHI-2++(3553); CHARMONIUM; GLUON; ARRAY AB The production of the chi2 and chi2 states of charmonium has been observed in 300 GeV/c pi+/-N and pN interactions. The fraction of the total inclusive J/psi production due to radiative chi decay has been determined to be 0.40 +/- 0.04, 0.37 +/- 0.03, and 0.30 +/- 0.04 for the pi+, pi-, and proton data, respectively. Total cross sections for chi1 and chi2 production of 131 +/- 18 +/- 14 and 188 +/- 30 +/- 21 nb/nucleon in the 300 GeV/c pi-N interactions have been obtained. By measuring the contributions to the J/psi production due to both psi' and radiative chi decay, the cross sections for direct J/psi production have been determined to be 97 +/- 14, 102 +/- 14, and 89 +/- 12 nb/nucleon for pi+, pi-, and protons, respectively. C1 UNIV ATHENS,ATHENS,GREECE. DUKE UNIV,DURHAM,NC 27706. MCGILL UNIV,MONTREAL H3A 2T8,QUEBEC,CANADA. NANJING UNIV,NANJING,PEOPLES R CHINA. PRAIRIE VIEW A&M UNIV,PRAIRIE VIEW,TX 77445. UNIV VIRGINIA,CHARLOTTESVILLE,VA 22901. NORTHWESTERN UNIV,EVANSTON,IL 60208. SHANDONG UNIV,SHANDONG,PEOPLES R CHINA. RP ANTONIAZZI, L (reprint author), FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510, USA. NR 25 TC 102 Z9 102 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 JAN 25 PY 1993 VL 70 IS 4 BP 383 EP 386 DI 10.1103/PhysRevLett.70.383 PG 4 WC Physics, Multidisciplinary SC Physics GA KH615 UT WOS:A1993KH61500006 ER PT J AU BERNARD, V KAISER, N LEE, TSH MEISSNER, UG AF BERNARD, V KAISER, N LEE, TSH MEISSNER, UG TI CHIRAL SYMMETRY AND THRESHOLD PI-0 ELECTROPRODUCTION SO PHYSICAL REVIEW LETTERS LA English DT Article ID NEUTRAL-PION-PHOTOPRODUCTION; P(GAMMA,PI-0) CROSS-SECTION; PERTURBATION-THEORY; LAGRANGIANS AB The electroproduction of neutral pions off protons close to threshold is studied within the framework of chiral perturbation theory. We compare to the recent data from NIKHEF and find good agreement. Further measurements as tests of chiral symmetry are discussed. C1 UNIV LOUIS PASTEUR,F-67037 STRASBOURG 2,FRANCE. TECH UNIV MUNICH,DEPT PHYS T30,W-8046 GARCHING,GERMANY. ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439. UNIV BERN,INST THEORET PHYS,CH-3012 BERN,SWITZERLAND. RP BERNARD, V (reprint author), CTR RECH NUCL,BP 20CR,F-67037 STRASBOURG 2,FRANCE. NR 25 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 JAN 25 PY 1993 VL 70 IS 4 BP 387 EP 390 DI 10.1103/PhysRevLett.70.387 PG 4 WC Physics, Multidisciplinary SC Physics GA KH615 UT WOS:A1993KH61500007 ER PT J AU MORTARA, JL AHMAD, I COULTER, KP FREEDMAN, SJ FUJIKAWA, BK GREENE, JP SCHIFFER, JP TRZASKA, WH ZEULI, AR AF MORTARA, JL AHMAD, I COULTER, KP FREEDMAN, SJ FUJIKAWA, BK GREENE, JP SCHIFFER, JP TRZASKA, WH ZEULI, AR TI EVIDENCE AGAINST A 17 KEV NEUTRINO FROM S-35 BETA-DECAY SO PHYSICAL REVIEW LETTERS LA English DT Article ID HEAVY NEUTRINOS; 17-KEV NEUTRINO; SPECTRUM; SEARCH; EMISSION AB We have searched for the effect of a neutrino of mass 17 keV/c2 in the beta decay of S-35 with an apparatus incorporating a high-resolution solid-state detector and a superconducting solenoid. The experimental mixing probability, sin2theta= -0.0004 +/- 0.0008(stat) +/- 0.0008(syst), is consistent with zero, in disagreement with several previous experiments. Our sensitivity to neutrino mass is verified by measurements with a mixed source of S-35 and C-14, which artificially produces a distortion in the beta spectrum similar to that expected from the massive neutrino. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CHICAGO,CHICAGO,IL 60637. TEXAS A&M UNIV SYST,COLL STN,TX 77843. RP MORTARA, JL (reprint author), UNIV CALIF BERKELEY,BERKELEY,CA 94720, USA. NR 23 TC 48 Z9 48 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 JAN 25 PY 1993 VL 70 IS 4 BP 394 EP 397 DI 10.1103/PhysRevLett.70.394 PG 4 WC Physics, Multidisciplinary SC Physics GA KH615 UT WOS:A1993KH61500009 ER PT J AU CASTEN, RF ZAMFIR, NV AF CASTEN, RF ZAMFIR, NV TI VALENCE CORRELATION SCHEMES AND NEW SIGNATURES OF NUCLEAR-STRUCTURE - A SIMPLE GLOBAL PHENOMENOLOGY FOR B(E2/21+-]01+) VALUES SO PHYSICAL REVIEW LETTERS LA English DT Article ID DEFORMATION; ISOTOPES AB It is shown that a simple renormalization allows nearly all B(E2:2(1)+ --> 0(1)+) values to be encompassed in a tight correlation envelope when plotted against N(p)N(n). Through such a valence correlation scheme, ''deviant'' nuclei are highlighted, and it is concluded that B (E2:2(1)+ --> 0(1)+) values alone can provide signatures, not only of quadrupole collectivity, but also of axial asymmetry, hexadecapole shapes, shape coexistence, saturation of collectivity, shell structure, and the evolution of shell gaps. Moreover, combined with E(4(1)+)/E(2(1)+) ratios, B(E2:2(1)+ --> 0(1)+) values provide a simple new signature to distinguish the two principal classes of nuclear phase transitions. C1 CLARK UNIV,WORCESTER,MA 01610. INST ATOM PHYS,BUCHAREST,ROMANIA. RP CASTEN, RF (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. RI Zamfir, Nicolae Victor/F-2544-2011 NR 13 TC 62 Z9 62 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 JAN 25 PY 1993 VL 70 IS 4 BP 402 EP 405 DI 10.1103/PhysRevLett.70.402 PG 4 WC Physics, Multidisciplinary SC Physics GA KH615 UT WOS:A1993KH61500011 ER PT J AU LARSSON, M DANARED, H MOWAT, JR SIGRAY, P SUNDSTROM, G BROSTROM, L FILEVICH, A KALLBERG, A MANNERVIK, S RENSFELT, KG DATZ, S AF LARSSON, M DANARED, H MOWAT, JR SIGRAY, P SUNDSTROM, G BROSTROM, L FILEVICH, A KALLBERG, A MANNERVIK, S RENSFELT, KG DATZ, S TI DIRECT HIGH-ENERGY NEUTRAL-CHANNEL DISSOCIATIVE RECOMBINATION OF COLD H3+ IN AN ION STORAGE RING SO PHYSICAL REVIEW LETTERS LA English DT Article ID CROSS-SECTIONS; H5+ IONS; H-3+; ELECTRONS; HCO+; COEFFICIENTS; COLLISIONS; H-3(+); BEAM AB The cross section for neutral-channel dissociative recombination of vibrationally cooled H-3+ at energies between 0.0025 and 30 eV has been measured by utilizing the electron cooler at the storage ring CRYRING. The molecular ions were stored at an energy of 32.6 MeV and phase-space cooled by the electron cooler for about 8 s prior to data taking. A peak in the cross section at 9.5 eV is interpreted as a direct adiabatic neutral-channel recombination through the 2A1 resonant state. The cross section below 1 eV is in rather good agreement with single-pass data. C1 MANNE SIEGBAHN INST PHYS, S-10405 STOCKHOLM, SWEDEN. N CAROLINA STATE UNIV, DEPT PHYS, RALEIGH, NC 27695 USA. COMIS NACL ENERGIA ATOM, DEPT PHYS, RA-1429 BUENOS AIRES, DF, ARGENTINA. OAK RIDGE NATL LAB, DIV PHYS, OAK RIDGE, TN 37831 USA. RP ROYAL INST TECHNOL, DEPT PHYS 1, S-10044 STOCKHOLM 70, SWEDEN. NR 33 TC 135 Z9 135 U1 0 U2 4 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 25 PY 1993 VL 70 IS 4 BP 430 EP 433 DI 10.1103/PhysRevLett.70.430 PG 4 WC Physics, Multidisciplinary SC Physics GA KH615 UT WOS:A1993KH61500018 ER PT J AU TRANQUADA, JM BUTTREY, DJ RICE, DE AF TRANQUADA, JM BUTTREY, DJ RICE, DE TI PHASE-SEPARATION, CHARGE-DENSITY WAVES, AND MAGNETISM IN LA2NIO4+DELTA WITH DELTA = 0.105 SO PHYSICAL REVIEW LETTERS LA English DT Article ID NEUTRON-DIFFRACTION; OXYGEN AB Neutron diffraction measurements on a highly doped single crystal of La2NiO4+delta (delta = 0.105) reveal that below room temperature the crystal undergoes phase separation into an orthorhombic structure, with a doubled unit cell along c, and a tetragonal phase. The lattice distortion in the orthorhombic phase suggests charge-density-wave order, and related diffuse scattering is observed at room temperature. The orthorhombic phase orders antiferromagnetically below 55 K with a significant ordered moment (approximately 0.7 mu(B)). C1 UNIV DELAWARE,DEPT CHEM ENGN,NEWARK,DE 19716. RP TRANQUADA, JM (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. RI Tranquada, John/A-9832-2009 OI Tranquada, John/0000-0003-4984-8857 NR 18 TC 61 Z9 61 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 JAN 25 PY 1993 VL 70 IS 4 BP 445 EP 448 DI 10.1103/PhysRevLett.70.445 PG 4 WC Physics, Multidisciplinary SC Physics GA KH615 UT WOS:A1993KH61500022 ER PT J AU CAMPBELL, GH FOILES, SM GUMBSCH, P RUHLE, M KING, WE AF CAMPBELL, GH FOILES, SM GUMBSCH, P RUHLE, M KING, WE TI ATOMIC-STRUCTURE OF THE (310) TWIN IN NIOBIUM - EXPERIMENTAL-DETERMINATION AND COMPARISON WITH THEORETICAL PREDICTIONS SO PHYSICAL REVIEW LETTERS LA English DT Article ID CUBIC TRANSITION-METALS; TILT GRAIN-BOUNDARIES; INTERATOMIC POTENTIALS; HIGH-RESOLUTION; BCC METALS; MODEL; MOLYBDENUM; SURFACES AB The atomic structure of the (310) twin in Nb was predicted using interatomic potentials derived from the embedded atom method (EAM), Finnis-Sinclair theory (FS), and the model generalized pseudopotential theory (MGPT). The EAM and FS predicted structures with crystal translations which break mirror symmetry. The MGPT predicted one stable structure which possessed mirror symmetry. This defect was experimentally determined to have mirror symmetry. These findings emphasize that the angular dependent interactions modeled by the MGPT are important for determining defect structures in bcc transition metals. C1 SANDIA NATL LABS,LIVERMORE,CA 94551. MAX PLANCK INST MET RES,INST WERKSTOFFWISSENSCH,W-7000 STUTTGART 80,GERMANY. RP CAMPBELL, GH (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. RI Campbell, Geoffrey/F-7681-2010; Gumbsch, Peter/E-5879-2012; OI Gumbsch, Peter/0000-0001-7995-228X; Foiles, Stephen/0000-0002-1907-454X NR 31 TC 50 Z9 50 U1 0 U2 9 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 JAN 25 PY 1993 VL 70 IS 4 BP 449 EP 452 DI 10.1103/PhysRevLett.70.449 PG 4 WC Physics, Multidisciplinary SC Physics GA KH615 UT WOS:A1993KH61500023 ER PT J AU COOPER, F LUCHERONI, C SHEPARD, H SODANO, P AF COOPER, F LUCHERONI, C SHEPARD, H SODANO, P TI VARIATIONAL METHOD FOR STUDYING SOLITONS IN THE KORTEWEG-DEVRIES EQUATION SO PHYSICS LETTERS A LA English DT Article AB We use a variation method based on the principle of least action to obtain approximate time-dependent single soliton solutions to the KdV equation. A class of trial variational functions of the form u (x, t) = -A (t) exp [-beta(t) \x- q(t)\2n], with n a continuous real variable, is used to parametrize time-dependent solutions. We find that this class of trial functions leads to soliton-like solutions for all n, moving with fixed shape and constant velocity, and with energy and mass conserved. Minimizing the energy of the soliton with respect to the parameter n, we obtain a variational solution that gives an extremely accurate approximation to the exact solution. C1 UNIV PERUGIA,INFN,DIPARTIMENTO FIS & SEZ,I-06100 PERUGIA,ITALY. UNIV NEW HAMPSHIRE,DEPT PHYS,DURHAM,NH 03824. RP COOPER, F (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 6 TC 9 Z9 9 U1 2 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 JAN 25 PY 1993 VL 173 IS 1 BP 33 EP 36 DI 10.1016/0375-9601(93)90083-C PG 4 WC Physics, Multidisciplinary SC Physics GA KJ198 UT WOS:A1993KJ19800008 ER PT J AU CHRISTOPHOROU, LG ILLENBERGER, E AF CHRISTOPHOROU, LG ILLENBERGER, E TI SCATTERING OF SLOW-ELECTRONS FROM EXCITED ATOMS - THE DOMINANT ROLE OF THE POLARIZATION POTENTIAL SO PHYSICS LETTERS A LA English DT Article ID TOTAL CROSS-SECTIONS; STATIC DIPOLE POLARIZABILITIES; IMPACT IONIZATION; SODIUM ATOMS; SUPEREXCITED STATES; ATTACHMENT; EXCITATION; HELIUM; ALKALI; HYDROGEN AB The total electron scattering cross sections from ground state and excited atoms are correlated with their static polarizabilities. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP CHRISTOPHOROU, LG (reprint author), FREE UNIV BERLIN,INST PHYS & THEORET CHEM,W-1000 BERLIN 33,GERMANY. NR 84 TC 18 Z9 18 U1 0 U2 0 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 JAN 25 PY 1993 VL 173 IS 1 BP 78 EP 82 DI 10.1016/0375-9601(93)90091-D PG 5 WC Physics, Multidisciplinary SC Physics GA KJ198 UT WOS:A1993KJ19800016 ER PT J AU CARNEIRO, JWD SEIDL, PR TOSTES, JGR TAFT, CA HAMMOND, BL SOTO, MM LESTER, WA AF CARNEIRO, JWD SEIDL, PR TOSTES, JGR TAFT, CA HAMMOND, BL SOTO, MM LESTER, WA TI THE EFFECTS OF LONE PAIRS ON CHARGE-DISTRIBUTION IN THE TETRACYCLIC NORBORNYL DERIVATIVES SO CHEMICAL PHYSICS LETTERS LA English DT Article AB Ab initio and MM2 calculations are used to investigate charge distributions in different conformations of the hydroxyl groups in unsaturated alcohols containing norbornyl units. The calculated net atomic charges indicate that hydrogens as well as carbons lying between oxygen lone pairs become more positively charged. C1 UNIV FED FLUMINENES,DEPT FISICO QUIM,BR-24249 NITEROI,RJ,BRAZIL. CTR BRASILEIRO PESQUISAS FIS,BR-22290 RIO JANEIRO,BRAZIL. FUJITSU AMER INC,COMP RES DIV,SAN JOSE,CA 95134. LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. RP CARNEIRO, JWD (reprint author), INST MILLITAR ENGN,SECAO QUIM,BR-22290 RIO JANEIRO,BRAZIL. RI Carneiro, Jose/I-9932-2014 OI Carneiro, Jose/0000-0002-3491-1764 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 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD JAN 22 PY 1993 VL 202 IS 3-4 BP 278 EP 283 DI 10.1016/0009-2614(93)85278-V PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KH778 UT WOS:A1993KH77800018 ER PT J AU SPERBER, KR HAMEED, S AF SPERBER, KR HAMEED, S TI PHASE LOCKING OF NORDESTE PRECIPITATION WITH SEA-SURFACE TEMPERATURES SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID TROPICAL ATLANTIC; SOUTHERN OSCILLATION; NORTHEAST BRAZIL; RAINFALL; VARIABILITY; CIRCULATION; ANOMALIES; CLIMATE; SECTOR; AFRICA AB Interannual variations of precipitation in several regions around the globe are known to be influenced by sea surface temperatures. We describe a procedure that elicits the same frequencies of variations in the sea surface temperatures as in precipitation. The modes of variation in the two fields are phase locked, allowing us to identify regions in the oceans that vary in unison with changes in precipitation on different time scales. The method is illustrated by application to the northeast section of Brazil, the Nordeste, where flood and drought occur frequently. C1 SUNY STONY BROOK,INST TERR & PLANETARY ATMOSPHERES,STONY BROOK,NY 11794. RP SPERBER, KR (reprint author), LAWRENCE LIVERMORE NATL LAB,PROGRAM CLIMATE MODEL DIAG & INTERCOMPARISON,POB 808,LAWRENCE,CA 94551, USA. RI Sperber, Kenneth/H-2333-2012 NR 15 TC 15 Z9 16 U1 0 U2 1 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 JAN 22 PY 1993 VL 20 IS 2 BP 113 EP 116 DI 10.1029/92GL02919 PG 4 WC Geosciences, Multidisciplinary SC Geology GA KK361 UT WOS:A1993KK36100009 ER PT J AU MCILROY, A TULLY, FP AF MCILROY, A TULLY, FP TI KINETIC-STUDY OF OH REACTIONS WITH PERFLUOROPROPENE AND PERFLUOROBENZENE SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID ETHANE AB We report the results of kinetic studies of the reactions OH + perfluoropropene (293-831 K) and OH + perfluorobenzene (244-830 K) performed by using the laser photolysis/cw, laser-induced fluorescence technique. The primary reactive step involves OH addition to a multiple bond. A reaction model based on the accepted mechanism for OH + hydrogenated unsaturate reactions is applied to the subject reactions with only partial success. We compare adduct bond dissociation energies determined from the reaction model with those computed in electronic-structure calculations. Discrepancies in these and other model-determined parameters suggest that fluorination of the unsaturated reactants significantly complicates the reaction mechanism. RP MCILROY, A (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551, USA. NR 9 TC 31 Z9 32 U1 1 U2 2 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 JAN 21 PY 1993 VL 97 IS 3 BP 610 EP 614 DI 10.1021/j100105a013 PG 5 WC Chemistry, Physical SC Chemistry GA KH929 UT WOS:A1993KH92900013 ER PT J AU PAFFETT, MT LOGAN, AD TAYLOR, TN AF PAFFETT, MT LOGAN, AD TAYLOR, TN TI SN DEPOSITION ON RU(001) - A MULTITECHNIQUE SURFACE SCIENCE STUDY SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID PRESSURE CATALYTIC REACTIONS; AUGER-ELECTRON SPECTROSCOPY; CRYSTAL METAL-SURFACES; ALKALI ION-SCATTERING; SOLID-SOLUTIONS; BINARY-SYSTEMS; PHASE-DIAGRAMS; CO OXIDATION; FILM GROWTH; PT(111) AB Tin deposition on the Ru(001) surface was studied by Auger electron spectroscopy (AES), low-energy electron diffraction (LEED), and low-energy ion scattering spectroscopy (LEISS). Tin deposition (AES signal intensity) versus time plots obtained over the substrate temperature (T(s)) range 330-670 K indicate that the Sn adatoms exhibit several different deposition growth modes. At T(s) = 330 K the Sn deposition follows a Stranski-Kranstanov growth mode (uniform monolayer followed by three-dimensional growth). Two LEED patterns are seen for T(s) = 330 K Sn depositions that are interpreted in terms of ordered Sn overlayers in the submonolayer coverage regime. For Sn depositions at T(s) = 500 K the Sn overlayer growth is also approximated by a Stranski-Kranstanov growth mode with the second and subsequent layers exhibiting less three-dimensional nucleation than at 330 K. For specific Sn depositions at T(s) > 600 K and upon annealing to 1000 K, ordered surfaces with (square-root 3 X square-root 3)R30-degrees and p( 2 x 2) LEED patterns are obtained depending upon initial Sn precoverages and annealing temperatures and are suggested to arise from surface alloys. LEISS data indicate that the (square-root 3 X square-root 3)R30-degrees surface alloy has a surface Sn/Ru atom ratio of 2:1. RP PAFFETT, MT (reprint author), LOS ALAMOS NATL LAB,DIV CLS,LOS ALAMOS,NM 87545, USA. NR 31 TC 8 Z9 8 U1 0 U2 2 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 JAN 21 PY 1993 VL 97 IS 3 BP 690 EP 695 DI 10.1021/j100105a026 PG 6 WC Chemistry, Physical SC Chemistry GA KH929 UT WOS:A1993KH92900026 ER PT J AU CULLER, TS SCHIFERL, D AF CULLER, TS SCHIFERL, D TI NEW CHEMICAL-REACTIONS IN METHANE AT HIGH-TEMPERATURES AND PRESSURES SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID DIAMOND FILMS; VAPOR-DEPOSITION; RAMAN-SPECTROSCOPY; SOLID CH4; PLASMA; GAS; GROWTH; DISCHARGE; PHASE AB We have used a Merrill-Bassett diamond anvil cell and Raman spectroscopy to study methane at high pressures (up to 13 GPa) and high temperatures (up to 912 K). At 2.5-5.0 GPa and 912 K, methane photoreacts with the laser light used for Raman spectroscopy and forms a graphitelike soot compound. At room temperature and pressure the Raman spectrum of the new material has an intense peak with a frequency of 1597 cm-1. At higher pressures and temperatures (10-1 3 GPa and 948 K) a sample of 13CD4 methane photoreacted with the laser light and formed a hard, clear, solid film. At 0.34 GPa and 300 K, this film had Raman peaks at 541 and 1605 cm-1. The 541-cm-1 peak may correspond to the 550-cm-1 peak found in some diamondlike carbon (DLC) films formed by chemical vapor deposition (CVD), but the 1605-cm-1 peak does not appear to have any such counterpart. Other possible Raman peaks were masked by interference from the diamond anvils. Thus, while the hard, clear film has some similarities to CVD DLC films, some important differences and questions remain. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 35 TC 3 Z9 3 U1 0 U2 5 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 JAN 21 PY 1993 VL 97 IS 3 BP 703 EP 706 DI 10.1021/j100105a028 PG 4 WC Chemistry, Physical SC Chemistry GA KH929 UT WOS:A1993KH92900028 ER PT J AU ALLENDORF, MD MELIUS, CF AF ALLENDORF, MD MELIUS, CF TI THEORETICAL-STUDY OF THE THERMOCHEMISTRY OF MOLECULES IN THE SI-C-CL-H SYSTEM SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID SILICON-CONTAINING COMPOUNDS; BOND-DISSOCIATION ENERGY; ELECTRONEGATIVITY SCALE; ALKYLSILANE DERIVATIVES; HEATS; HYDROGEN; KINETICS; CARBIDE; GROWTH AB Ab initio electronic structure calculations coupled with empirical corrections are used to obtain a self-consistent set of heats of formation for molecules in the series CH(n)SiCl(m) (n, m = 0-3) and for selected molecules in the series (CH3)(n)SiH(m)Cl(p). Heats of formation are also reported for the series Cl(n)SiSiCl(m) (m, n = 0-3) and for HC=CSiCl2H and H2C=CH(SiCl2H). Gibbs free energies as a function of temperature and standard entropies are given for all molecules in the study. Heats of formation are used to evaluate potential pathways for the decomposition Of Cl3SiCH3, a common silicon carbide chemical vapor deposition precursor. The analysis includes the calculation of the transition state for the 1,2-elimination of HCl from Cl3SiCH3. RP SANDIA NATL LABS, COMBUST RES FACIL, LIVERMORE, CA 94551 USA. NR 37 TC 114 Z9 115 U1 2 U2 5 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 JAN 21 PY 1993 VL 97 IS 3 BP 720 EP 728 DI 10.1021/j100105a031 PG 9 WC Chemistry, Physical SC Chemistry GA KH929 UT WOS:A1993KH92900031 ER PT J AU MORTLOCK, RF BELL, AT RADKE, CJ AF MORTLOCK, RF BELL, AT RADKE, CJ TI P-31 AND AL-27 NMR INVESTIGATIONS OF HIGHLY ACIDIC, AQUEOUS-SOLUTIONS CONTAINING ALUMINUM AND PHOSPHORUS SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID ALUMINOPHOSPHATE MOLECULAR-SIEVES; NON-BIOLOGICAL ASPECTS; SOLID-STATE NMR; GROUND-STATES; SPECTROSCOPY; VPI-5 AB P-31 and Al-27 NMR spectroscopies have been used to characterize acidic, aqueous solutions of orthophosphoric acid, aluminum chloride, and tetramethylammonium (TMA) hydroxide. The final compositions of the solutions range from 0.1 to 1 mol % P, 0.0 to 20 mol % HCI, P/Al = 0.1 to 20, and P/(TMA)20 = 2 to 20. Soluble aluminophosphate cations form reactions of hexaaqua Al monomeric cations, [Al(H20)6]3+, with phosphate ligands (i.e., H3PO4, H2PO4-, and acid dimers H6P2O8 and H5P2O7-). P-31 NMR spectra of aluminophosphate solutions reveal five distinct chemical shift regions. Free phosphate molecules and ions resonate at 3 to 5 ppm, P nuclei in acid dimers bonded to Al monomers resonate at -3.5 to -5.5 ppm, P nuclei in H2PO4- ions bonded to Al monomers resonate at -8.5 to -11 ppm, P nuclei in H3PO4 molecules bonded to Al monomers resonate at -11 to -13 ppm, and P nuclei bridging two Al monomers resonate at < 15 ppm. A correlation between the partial charge on P nuclei (calculated using semiemperical molecular orbital theory, MNDO [modified neglect of differential overlap]) and the P-31 NMR chemical shift confirms the assignments of the P-31 NMR resonances. Regardless of the total charge of the complex or the connectivity of the Al to -0-P units, the MNDO calculations show that P atoms in the same type of phosphate ligand bonded to Al monomers have similar partial charges, and, therefore, exhibit nearly identical P-31 chemical shifts. Al-27 NMR spectra of aluminophosphate solutions display four resonances: A peak at 0 ppm assigned to free Al monomers, a peak from -3 to -5 ppm assigned to Al monomers bonded to phosphate acid dimers, a peak from -6 to -7.5 ppm assigned to Al monomers bonded to H3PO4 molecules, and at peak from -7.5 to 9 ppm assigned to Al monomers bonded to H2PO4- ions. The assignment of the Al-27 NMR resonances is based on the manner in which the Al-27 and P-31 NMR peaks change in intensity with pH, P, and Al concentration. Estimates of the number of Al-O-P bonds are calculated independently from P-31 and Al-27 NMR spectra and agree quite closely for a range of pH's and both Al and P concentrations. C1 UNIV CALIF BERKELEY, DEPT CHEM ENGN, BERKELEY, CA 94720 USA. LAWRENCE BERKELEY LAB, CTR ADV MAT, BERKELEY, CA 94720 USA. NR 43 TC 56 Z9 57 U1 1 U2 10 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 JAN 21 PY 1993 VL 97 IS 3 BP 767 EP 774 DI 10.1021/j100105a039 PG 8 WC Chemistry, Physical SC Chemistry GA KH929 UT WOS:A1993KH92900039 ER PT J AU MORTLOCK, RF BELL, AT RADKE, CJ AF MORTLOCK, RF BELL, AT RADKE, CJ TI P-31 AND AL-27 NMR INVESTIGATIONS OF THE EFFECTS OF PH ON AQUEOUS-SOLUTIONS CONTAINING ALUMINUM AND PHOSPHORUS SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article AB P-31 and Al-27 NMR spectroscopies are used to characterize the distribution of soluble aluminophosphate species in aqueous solutions of tetramethylammonium (TMA) hydroxide, phosphoric acid, and aluminum chloride. Solution compositions range from 0.1 to 1 mol % P, P/Al = 0.1-5, P/(TMA)20 = 0.37-10. For solutions of 1 mol % P, a phase diagram is constructed for various concentrations of TMAOH and Al, The phase diagram is divided into three regions: a high-pH region (pH greater-than-or-equal-to 6), a medium-pH range (2 less-than-or-equal-to pH less-than-or-equal-to 10) in which stable solid phases exist, and a low-pH region (pH less-than-or-equal-to 2). In the low-pH region, soluble aluminophosphate complexes form between P species (H3PO4 acid dimers, H3PO4 molecules, and H2PO4- ions) and Al species (Al monomers as [Al(H20)6]3+ cations, and Al dimers as [Al2(OH)2(H20)8]4+ cations). Specific P-31 NMR and Al-27 NMR peaks are assigned to P and Al nuclei in aluminophosphate complexes which are stable in the low pH range. In the high-pH region, soluble aluminophosphate Complexes form between HPO42- ions and Al species. Also at high pH, P-31 NMR spectra display a series of sharp resonances (from -2 to 5 ppm) assigned to P atoms in aluminophosphate Complexes. Al-27 NMR spectra of the same solutions display broad features centered at 5 ppm assigned to octahedrally coordinated Al bonded through oxygen to P, at almost-equal-to 45.5 ppm to pentacoordinated Al bonded through oxygen to P, and at almost-equal-to 65 ppm to tetrahedrally coordinated Al bonded through oxygen to P. Pentacoordinated Al complexes are observed only when the concentration of P exceeds the concentration of Al and then only in neutral pH. Independent Al-O-P bond counts from P-31 and Al-27 NMR spectra of aluminophosphate solutions of high pH (greater-than-or-equal-to 6) indicate that each octahedrally coordinated, pentacoordinated, and tetrahedrally coordinated Al nucleus is bonded primarily to only one phosphate ligand. C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720. OI Bell, Alexis/0000-0002-5738-4645 NR 20 TC 69 Z9 69 U1 2 U2 11 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 JAN 21 PY 1993 VL 97 IS 3 BP 775 EP 782 DI 10.1021/j100105a040 PG 8 WC Chemistry, Physical SC Chemistry GA KH929 UT WOS:A1993KH92900040 ER PT J AU SAHNI, SK DREW, MGB BELL, TW BRUNSCHWIG, BS AF SAHNI, SK DREW, MGB BELL, TW BRUNSCHWIG, BS TI BUILDING-BLOCKS FOR POLYMETALLIC RUTHENIUM(II) AND OSMIUM(II) POLYPYRIDINE LUMINOPHORES SO JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS LA English DT Article ID COMPLEXES; PHOTOCHEMISTRY; PHOTOPHYSICS; LUMINESCENCE; CHEMISTRY; ELECTRON; REDOX AB Three novel, mixed-ligand complexes of ruthenium and osmium are prepared; the key example [Ru(bpy)2bpaH] (PF6)2 [bpy = 2,2'-bipyridine; bpaH = bis(picolyl)amine] 1 bears a 'dangling' pyridine ligand according to X-ray crystallography and has a luminescence lifetime comparable with that of [Ru(bpy)3]2+. C1 UNIV WHITEKNIGHTS, DEPT CHEM, READING RG6 2AD, ENGLAND. SUNY STONY BROOK, DEPT CHEM, STONY BROOK, NY 11794 USA. BROOKHAVEN NATL LAB, DEPT CHEM, UPTON, NY 11973 USA. RI Brunschwig, Bruce/G-4249-2011 NR 27 TC 11 Z9 11 U1 0 U2 0 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 0022-4936 J9 J CHEM SOC CHEM COMM JI J. Chem. Soc.-Chem. Commun. PD JAN 21 PY 1993 IS 2 BP 123 EP 125 DI 10.1039/c39930000123 PG 3 WC Chemistry, Multidisciplinary SC Chemistry GA KJ771 UT WOS:A1993KJ77100013 ER PT J AU SABATANI, E REDONDO, A RISHPON, J RUDGE, A RUBINSTEIN, I GOTTESFELD, S AF SABATANI, E REDONDO, A RISHPON, J RUDGE, A RUBINSTEIN, I GOTTESFELD, S TI MORPHOLOGY CONTROL IN ELECTROCHEMICALLY GROWN CONDUCTING POLYMER-FILMS .2. EFFECTS OF CATHODIC BIAS ON ANODICALLY GROWN FILMS STUDIED BY SPECTROSCOPIC ELLIPSOMETRY AND QUARTZ-CRYSTAL MICROBALANCE SO JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS LA English DT Article ID POLYANILINE FILMS; ANILINE; ANIONS AB We describe studies of effects of electrochemical growth conditions on the morphology of films of polyaniline (PANI). From single-wavelength ellipsometric measurements dur ng film growth at constant anodic current, we have concluded that the temporary application of a cathodic bias during such an anodic growth process brings about an effect of (electrochemical) film annealing. This conclusion is further supported by a spectroscopic ellipsometric study. The spectroscopic study shows that follow ng temporary application of a cathodic bias during the galvanostatic growth of PANI films, the absorption peak in the near-infrared, associated with polarons in doped PANI, is shifted to lower photon energies. Such a shift is expected as a result of higher long-range order. The film annealing effect induced by temporary application, of a cathodic bias is corraborated by further experimental evidence from quartz-crystal microbalance and electrode potential measurements. This beneficial morphological effect explains, at least in part, why potential multicycling has become a preferred mode of electrochemical growth of conducting polymer films. We suggest a possible interpretation for such annealing effects in an anodically grown conducting-polymer film brought about by interruption of the anodic growth current and temporary application of a cathodic bias. Elucidation of this phenomenon could be also valuable in the clarification of effects of undoping-redoping cycles applied to conducting-polymer membranes to achieve optimized gas-separation characteristics. C1 LOS ALAMOS NATL LAB, ELECTR RES GRP, LOS ALAMOS, NM 87545 USA. NR 18 TC 32 Z9 33 U1 0 U2 10 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 0956-5000 J9 J CHEM SOC FARADAY T JI J. Chem. Soc.-Faraday Trans. PD JAN 21 PY 1993 VL 89 IS 2 BP 287 EP 294 DI 10.1039/ft9938900287 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KJ761 UT WOS:A1993KJ76100018 ER PT J AU MANGEL, WF MCGRATH, WJ TOLEDO, DL ANDERSON, CW AF MANGEL, WF MCGRATH, WJ TOLEDO, DL ANDERSON, CW TI VIRAL-DNA AND A VIRAL PEPTIDE CAN ACT AS COFACTORS OF ADENOVIRUS VIRION PROTEINASE ACTIVITY SO NATURE LA English DT Article ID TYPE-2 AB HUMAN adenovirus (Ad2), like many other viruses1, contains a virion-associated proteinase essential for the synthesis of infectious virus particles2-4. We observed proteinase activity in wild-type virus but not in the ts-1 virus2, which contains a mutation in the Ad2 L3 endoprotease gene5 that confers temperature-sensitive processing of virion precursor proteins. Unexpectedly, we did not observe proteinase activity with purified recombinant6,7 endoprotease protein (M(r) 23 K). Purified recombinant endoprotease protein, however, complemented the mutation in ts-1 virions, restoring proteinase activity when mixed together. This implied that cofactors may be required. Here we reconstitute proteinase activity in vitro with three purified viral components: (1) the recombinant endoprotease protein; (2) an 11-amino-acid peptide that originates from the carboxy terminus of pVI, the precursor to virion component VI; and (3) adenovirus DNA. The use of DNA for a proteinase activity is unprecedented. RP MANGEL, WF (reprint author), BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973, USA. NR 11 TC 130 Z9 131 U1 1 U2 5 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD JAN 21 PY 1993 VL 361 IS 6409 BP 274 EP 275 DI 10.1038/361274a0 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KH614 UT WOS:A1993KH61400065 PM 8423855 ER PT J AU BAADHIO, RA AF BAADHIO, RA TI GLOBAL GRAVITATIONAL ANOMALY-FREE TOPOLOGICAL FIELD-THEORY SO PHYSICS LETTERS B LA English DT Article ID GAUGE NONINVARIANCE; PARITY VIOLATION AB We demonstrate the absence of global gravitational anomalies for a small class of three-manifolds in which topological field theory is defined, by establishing the absence of disconnected general coordinate transformations. Specifically, we prove the invariance of the Chern-Simons-Witten effective action under the mapping class group, that is, the group of equivalence classes of diffeomorphisms that cannot be smoothly deformed to the identity. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. RP BAADHIO, RA (reprint author), LAWRENCE BERKELEY LAB,DIV PHYS,THEORET PHYS GRP,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 15 TC 1 Z9 1 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 JAN 21 PY 1993 VL 299 IS 1-2 BP 37 EP 40 DI 10.1016/0370-2693(93)90880-Q PG 4 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KK353 UT WOS:A1993KK35300007 ER PT J AU FALK, AF LUKE, M WISE, MB AF FALK, AF LUKE, M WISE, MB TI ANALYTICITY AND THE ISGUR-WISE FUNCTION SO PHYSICS LETTERS B LA English DT Article ID FORM-FACTORS; MESONS; MODEL; DECAY AB We reconsider the recent derivation by de Rafael and Taron of bounds on the slope of the Isgur-Wise function. We argue that one must be careful to include cuts starting below the heavy meson pair production threshold, arising from heavy quark-antiquark bound states, and that if such cuts are properly accounted for then no constraints may be derived. C1 UNIV CALIF SAN DIEGO,DEPT PHYS 0319,LA JOLLA,CA 92093. CALTECH,DEPT PHYS,PASADENA,CA 91125. RP FALK, AF (reprint author), STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 14 TC 18 Z9 18 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 JAN 21 PY 1993 VL 299 IS 1-2 BP 123 EP 126 DI 10.1016/0370-2693(93)90892-L PG 4 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KK353 UT WOS:A1993KK35300019 ER PT J AU HIME, A AF HIME, A TI DO SCATTERING EFFECTS RESOLVE THE 17-KEV CONUNDRUM SO PHYSICS LETTERS B LA English DT Article ID BETA-SPECTRUM; NEUTRINO; ELECTRONS; EMISSION; DECAY AB The anomalies observed in beta-decay measurements at Oxford can be reinterpreted after account is made for a more complete electron response function. Specifically, a reanalysis including intermediate scattering effects places an upper limit (90% CL) on the mixing probability for a 17-keV neutrino of 0.35% and 0.53%, using the S-35 and Ni-63 data respectively. Despite the different geometries employed, scattering effects can play an important role in the S-35 experiments at Guelph, although a rigorous treatment is difficult. Missing links remain, and thoughts are provided on how the situation can be clarified with additional beta-decay measurements. RP HIME, A (reprint author), LOS ALAMOS NATL LAB,DIV PHYS,LOS ALAMOS,NM 87545, USA. NR 23 TC 18 Z9 18 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 JAN 21 PY 1993 VL 299 IS 1-2 BP 165 EP 173 DI 10.1016/0370-2693(93)90898-R PG 9 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KK353 UT WOS:A1993KK35300025 ER PT J AU MATHEWS, GJ BOYD, RN FULLER, GM AF MATHEWS, GJ BOYD, RN FULLER, GM TI CHEMICAL EVOLUTION OF IRREGULAR GALAXIES AND THE PRIMORDIAL HE-4 ABUNDANCE SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, EVOLUTION; GALAXIES, ABUNDANCES; GALAXIES, IRREGULAR; NUCLEAR REACTIONS, NUCLEOSYNTHESIS, ABUNDANCES ID BIG-BANG NUCLEOSYNTHESIS; BARYON-NUMBER FLUCTUATIONS; HADRON PHASE-TRANSITION; NONZERO LEPTON NUMBERS; BLUE COMPACT GALAXIES; HELIUM ABUNDANCE; EARLY UNIVERSE; SOLAR NEIGHBORHOOD; NEUTRON DIFFUSION; COSMOLOGICAL NUCLEOSYNTHESIS AB We study several models for the origin and chemical evolution of compact irregular galaxies in order to determine the primordial He-4 abundance, Y(p), from the zero metallicity intercept of the observed Y versus Z correlations. This study confirms the suggestion that a straight-line fit to the observations does not necessarily give the correct primordial He-4 abundance. This is especially true for the extrapolation of the Y versus N/H data which depends upon the relative contributions from secondary and primary nitrogen in low metallicity stars. The extrapolation of the O/H data is also slightly nonlinear even for primary oxygen in a closed-box model with instantaneous recycling due to the time dependence of the hydrogen mass fraction, the breakdown of the instantaneous recycling approximation, the production of helium, nitrogen, and oxygen in stars of different mass, and ejection of metal-poor material from low-mass stars. Our best fits to the data, even after excluding possible contamination of H n regions from neighboring Wolf-Rayet stars, gives Y(p) = 0.228 +/- 0.005 for O/H and Y(p) = 0.223 +/- 0.006 for N/H. These primordial helium abundances are as much as 2 sigma below the minimum helium abundance which can be produced in the standard homogeneous big bang model with three light neutrino flavors. This discrepancy may be due to shortcomings of the chemical evolution models, additional systematic errors in the determination of the helium and/or metal abundances in extragalactic H II regions, or effects of nonstandard primordial nucleosynthesis. C1 OHIO STATE UNIV,DEPT PHYS,COLUMBUS,OH 43210. OHIO STATE UNIV,DEPT ASTRON,COLUMBUS,OH 43210. UNIV CALIF SAN DIEGO,DEPT PHYS,LA JOLLA,CA 92093. RP MATHEWS, GJ (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 80 TC 24 Z9 24 U1 1 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JAN 20 PY 1993 VL 403 IS 1 BP 65 EP 73 DI 10.1086/172183 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KG277 UT WOS:A1993KG27700009 ER PT J AU FIELD, GB ROGERS, RD AF FIELD, GB ROGERS, RD TI RADIATION FROM MAGNETIZED ACCRETION DISKS IN ACTIVE GALACTIC NUCLEI SO ASTROPHYSICAL JOURNAL LA English DT Article DE ACCRETION, ACCRETION DISKS; GALAXIES, ACTIVE; RADIATION MECHANISMS, MISCELLANEOUS ID X-RAY-SPECTRA; COMPTON REFLECTION; PAIR PRODUCTION; COLD MATTER; ORIGIN; ACCELERATION; GALAXIES; MODEL AB We present a model of active galactic nuclei (AGNs) based on accretion disks around 10(8) M. black holes, which incorporates a strong (B approximately 10(4) G) magnetic field in the disk, with loops above the disk in which B approximately 10(2) G. The mapetic energy in the loops dissipates, accelerating electrons to relativistic energies. The electrons emit synchrotron and inverse-Compton radiation, much of which is reflected or scattered by gas in the disk. We calculate the emitted spectrum from infrared to gamma rays. Of the total emission, 23% goes into a v-1 power law and 77% into thermal radiation at 24,000 K (due to the disk, which is heated by nonthermal radiation and energetic ions). The model accounts quantitatively for the X-ray and gamma-ray backgrounds, and it accounts qualitatively for certain features observed in individual AGNs: a far-infrared cutoff, a minimum at a few microns, the ultraviolet bump, the Compton reflection bump at approximately 30 keV, and a gamma-ray tail. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP FIELD, GB (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 32 TC 87 Z9 87 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 JAN 20 PY 1993 VL 403 IS 1 BP 94 EP 109 DI 10.1086/172185 PN 1 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KG277 UT WOS:A1993KG27700011 ER PT J AU ARONS, J TAVANI, M AF ARONS, J TAVANI, M TI HIGH-ENERGY EMISSION FROM THE ECLIPSING MILLISECOND PULSAR PSR 1957+20 SO ASTROPHYSICAL JOURNAL LA English DT Article DE BINARIES, ECLIPSING; GAMMA RAYS, THEORY; PULSARS, INDIVIDUAL (PSR 1957+20); SHOCK WAVES ID ELECTRON-POSITRON PLASMAS; PARTICLE-ACCELERATION; BINARY; PSR1957+20; SHOCKS; MODEL; PSR-1957+20; NEBULA; WINDS AB We study the properties of the high-energy emission expected from the eclipsing millisecond pulsar system PSR 1957+20. We consider emission by both the relativistic shock produced by the pulsar wind in the nebula surrounding the binary and by the shock constraining the mass outflow from the companion star of PSR 1957+20. We use the results of microscopic plasma physical models of relativistic shocks to suggest that the high-energy radiation is produced in the range from X-rays to approximately MeV gamma-rays in the binary and in the range from approximately 10(-2) eV to approximately 40 keV in the nebula. The source is expected to be too weak for detection by the instruments on board the Compton Gamma-Ray Observatory (GRO) in their normal pointing mode. However, ROSAT may be able to observe the high-energy emission from within the binary. If the parameters of the pulsar wind (ratio of kinetic energy flux to Poynting flux, ratio of heavy ion flow energy density to flow energy density of pairs, fraction of open field line voltage expended in accelerating ions) are similar to the values inferred by applying similar models to the Crab Nebula, ROSAT should be able to detect the emission from within the binary at the level of approximately 10(-3) photons s-1. Doppler boost of the emission in the radiating wind suggests the flux should vary on the orbital time scale, with the largest flux observed roughly coincident with the pulsar's radio eclipse. Thus ROSAT observations and possibly a dedicated long GRO observation of PSR 1957+20 can be used to gain information about the physics of pulsar winds interacting with their close environments. C1 UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720. LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA 94550. OI Tavani, Marco/0000-0003-2893-1459 NR 36 TC 92 Z9 92 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 JAN 20 PY 1993 VL 403 IS 1 BP 249 EP 255 DI 10.1086/172198 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KG277 UT WOS:A1993KG27700024 ER PT J AU LINK, B EPSTEIN, RI BAYM, G AF LINK, B EPSTEIN, RI BAYM, G TI SUPERFLUID VORTEX CREEP AND ROTATIONAL-DYNAMICS OF NEUTRON-STARS SO ASTROPHYSICAL JOURNAL LA English DT Article DE DENSE MATTER; STARS, INTERIORS; STARS, NEUTRON ID INTERNAL TEMPERATURE; PULSAR GLITCHES; VELA PULSAR; CRUST; HYDRODYNAMICS; MATTER AB The transfer of angular momentum from the rotating superfluid in a neutron star to the crust is likely responsible for pulsar glitches and postglitch relaxation, and bears on issues of internal heating, stellar precession, and general relativistic rotational instabilities. The change in angular momentum of the neutron superfluid is determined by the motion of its vortex lines. In the star's inner crust, vortices pin to the nuclear lattice and move by the process of vortex creep. Here we develop a rate theory for vortex creep. Our results differ from those of earlier work by including both quantum and classical unpinning processes, as well as the effects of vortex tension. Quantum tunneling sets a lower limit to the creep rate at low temperatures. Vortex tension reduces the creep rate by coupling adjacent pinning sites. The superfluid in the highest density parts of the inner crust (greater than or similar to 10(14) g cm-3) may approach rotational equilibrium on sufficiently short time scales and possess an adequate moment of inertia to account for observed postglitch relaxations. RP LINK, B (reprint author), LOS ALAMOS NATL LAB,MS D436,LOS ALAMOS,NM 87545, USA. NR 50 TC 68 Z9 68 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 JAN 20 PY 1993 VL 403 IS 1 BP 285 EP 302 DI 10.1086/172202 PN 1 PG 18 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KG277 UT WOS:A1993KG27700028 ER PT J AU KITAMOTO, S TSUNEMI, H MIYAMOTO, S ROUSSELDUPRE, D AF KITAMOTO, S TSUNEMI, H MIYAMOTO, S ROUSSELDUPRE, D TI THE UNSTABLE LONG-TERM PERIODICITY OF AQUILA X-1 SO ASTROPHYSICAL JOURNAL LA English DT Article DE STARS, INDIVIDUAL (AQUILA X-1); STARS, NEUTRON; X-RAYS, BINARIES ID X-RAY SOURCES; OPTICAL COUNTERPART; CENTAURUS X-4; OUTBURSTS; INSTABILITY; DISCOVERY; BURSTS; MODEL; STARS; NOVA AB We present the results of the periodicity analysis of 4.5 yr of data observed with the All Sky Monitor (ASM) on-board Ginga and of 10 yr of data accumulated by the Vela 5b satellite. ASM observed three outbursts from Aq1 X-1 which indicate a 309 day periodicity, but Vela 5b data instead show a 125 day periodicity. This result indicates that the Aq1 X-1 long-term periodicity is not stable and therefore, cannot be due to some regular mechanism such as orbital motion or precession. This long-term periodicity may be related to some unstable mechanism such as the activity of the companion star or some instability of the accretion disk. However, no models proposed so far can completely explain the observed behavior. C1 LOS ALAMOS NATL LAB,DIV SPACE SCI,LOS ALAMOS,NM 87544. RP KITAMOTO, S (reprint author), OSAKA UNIV,FAC SCI,DEPT EARTH & SPACE SCI,1-1 MACHIKANEYAMA CHO,TOYONAKA,OSAKA 560,JAPAN. NR 31 TC 30 Z9 30 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 JAN 20 PY 1993 VL 403 IS 1 BP 315 EP 321 DI 10.1086/172204 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KG277 UT WOS:A1993KG27700030 ER PT J AU CHAPUIS, CGL WALLYN, P DUROUCHOUX, P MATTESON, J PELLING, M BOWMAN, B BRIGGS, M GRUBER, D PETERSON, L LINGENFELTER, R CORK, C LANDIS, D LUKE, P MADDEN, N MALONE, D PEHL, R POLLARD, M LIN, R SMITH, D FEFFER, P HURLEY, K VEDRENNE, G NIEL, M VONBALLMOOS, P AF CHAPUIS, CGL WALLYN, P DUROUCHOUX, P MATTESON, J PELLING, M BOWMAN, B BRIGGS, M GRUBER, D PETERSON, L LINGENFELTER, R CORK, C LANDIS, D LUKE, P MADDEN, N MALONE, D PEHL, R POLLARD, M LIN, R SMITH, D FEFFER, P HURLEY, K VEDRENNE, G NIEL, M VONBALLMOOS, P TI OBSERVATION OF SN-1987A WITH THE GAMMA-RAY SPECTROMETER HEXAGON SO ASTROPHYSICAL JOURNAL LA English DT Article DE GAMMA-RAYS, OBSERVATIONS; SUPERNOVAE, INDIVIDUAL (SN-1987A) ID LARGE MAGELLANIC CLOUD; SUPERNOVA 1987A; X-RAY; NEUTRINO BURST; LINE EMISSION; LIGHT-CURVE; SN 1987A; RESOLUTION; DISCOVERY; SN1987A AB The HEXAGONE balloon-borne spectrometer was flown from Alice Springs (Australia) on 1989 May 22. HEXAGONE is a high-resolution gamma-ray spectrometer and consists of an array of twelve cooled germanium detectors (field of view 19-degrees at 511 keV). One of the observed targets was the supernova 1987A and it was seen during 9.9 hr, 818 days after the initial optical outburst. No significant hard X-ray or gamma-ray emission is detected in the final spectrum of SN 1987A. We report the upper limits of the flux values for the gamma-ray lines coming from the decay of radionuclides synthesized in this star such as Co-56, Co-57, or Ti-44. The results are consistent with models incorporating mixing of the radioactive nuclei in the ejecta 0.073 M. of Co-56, 3.1 10(-3) M. of Co-57 and 1.2 10(-4) M. of Ti-44. C1 UNIV CALIF SAN DIEGO,CTR ASTROPHYS & SPACE SCI,LA JOLLA,CA 92093. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720. CTR ETUD SPATIALE RAYONNEMENTS,F-31029 TOULOUSE,FRANCE. RP CHAPUIS, CGL (reprint author), CENS,SAP DPHG DAPNIA,SERV ASTROPHYS,F-91191 GIF SUR YVETTE,FRANCE. NR 43 TC 6 Z9 6 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 JAN 20 PY 1993 VL 403 IS 1 BP 332 EP 335 DI 10.1086/172206 PN 1 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KG277 UT WOS:A1993KG27700032 ER PT J AU GELB, JM GRADWOHL, BA FRIEMAN, JA AF GELB, JM GRADWOHL, BA FRIEMAN, JA TI LARGE-SCALE AND SMALL-SCALE CONSTRAINTS ON POWER SPECTRA IN OMEGA=1 UNIVERSES SO ASTROPHYSICAL JOURNAL LA English DT Article DE DARK MATTER; GALAXIES, FORMATION ID COLD DARK MATTER; VELOCITY; GALAXIES; DENSITY AB The cold dark matter (CDM) model of structure formation, normalized on large scales, leads to excessive pairwise velocity dispersions on small scales. In an attempt to circumvent this problem, we study three scenarios (all with OMEGA = 1) with more large-scale and less small-scale power than the standard CDM model: (1) cold dark matter with significantly reduced small-scale power (inspired by models with an admixture of cold and hot dark matter); (2) cold dark matter with a non-scale-invariant power spectrum; and (3) cold dark matter with coupling of dark matter to a long-range vector field. Despite the reduced small-scale power, when such models are evolved to large amplitude, the velocities on small scales are actually increased over CDM with the same value of sigma8. This ''flip-over,'' in disagreement with the expectation from linear perturbation theory, arises from the nonlinear coupling of the extra power on large scales with shorter wavelengths. However, the recent COBE DMR results indicate smaller amplitudes for these models, sigma8 approximately 0.5-0.7, than for CDM (for which sigma8 approximately 1.2). Therefore, when normalized to COBE on large scales, such models do lead to reduced velocities on small scales and they produce fewer halos compared with CDM. However, models with sufficiently low small-scale velocities apparently fail to produce an adequate number of halos. RP GELB, JM (reprint author), NASA,FERMILAB ASTROPHYS CTR,FERMI NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. NR 24 TC 25 Z9 25 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 JAN 20 PY 1993 VL 403 IS 1 BP L5 EP L8 DI 10.1086/186708 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KG282 UT WOS:A1993KG28200002 ER PT J AU BULLOCK, GL SHIVARAM, BS HINKS, DG AF BULLOCK, GL SHIVARAM, BS HINKS, DG TI CONSTRAINTS ON THE STRAIN-DEPENDENCE OF THE UPT3 SUPERCONDUCTING TRANSITIONS FROM LONGITUDINAL-ULTRASOUND MEASUREMENTS SO EUROPHYSICS LETTERS LA English DT Article ID HIGH MAGNETIC-FIELDS; PHASE-DIAGRAM; LOW-TEMPERATURES; HEAT; ATTENUATION; ANISOTROPY; SOUND AB We present measurements of longitudinal ultrasound in UPt3 along both the a- and c-axis in the region of the two superconducting transitions, T(c)+ and T(c)*. Using expressions from a model for the double superconducting transition, our measurements constrain the strain-dependences of a number of parameters. In particular, these constraints imply that the observed anisotropy in the stress-dependence of T(c)* results from anisotropy in the elastic compliance tensor, rather than anisotropy of the superconducting order parameter. We also report an anomalous lattice softening below 100 mK. C1 ARGONNE NATL LABS,DIV MAT SCI & TECHNOL,ARGONNE,IL 60639. RP BULLOCK, GL (reprint author), UNIV VIRGINIA,JESSE BEAMS LAB PHYS,CHARLOTTESVILLE,VA 22901, USA. NR 28 TC 12 Z9 12 U1 0 U2 1 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 0295-5075 J9 EUROPHYS LETT JI Europhys. Lett. PD JAN 20 PY 1993 VL 21 IS 3 BP 357 EP 362 DI 10.1209/0295-5075/21/3/017 PG 6 WC Physics, Multidisciplinary SC Physics GA KL317 UT WOS:A1993KL31700017 ER PT J AU CHAPMAN, EG LUECKEN, DJ AF CHAPMAN, EG LUECKEN, DJ TI ASSOCIATIONS BETWEEN POLLUTANT EMISSIONS AND PRECIPITATION CHEMISTRY - AN EMPIRICAL-ANALYSIS SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID SMELTER; MODELS; ACID AB Empirical analyses were conducted of the associations between anthropogenic SO2 emissions and precipitation SO42- concentrations as well as between anthropogenic NO(x) emissions and precipitation NO3-concentrations across central North America. Both the 1982 Electric Power Research Institute (EPRI) National Air Pollutant Emissions Inventory and the 1985 National Acid Precipitation Assessment Program (NAPAP) Emissions Inventory, along with precipitation chemistry data from up to 130 monitoring sites, were used in the analyses. Comparisons of the EPRI and NAPAP emissions inventories in their geographic area of overlap indicate that SO2 emissions differ more than do the NO(x) emissions, on both absolute and fractional difference scales. Empirical analysis results indicate that the associations between anthropogenic SO2 emissions and precipitation SO42- are stronger than associations between anthropogenic NO(x) emissions and precipitation NO3- concentrations, with the associations equally well represented by either a power law or linear law function. Distinct regional and seasonal differences exist in the strength of the associations. RP CHAPMAN, EG (reprint author), PACIFIC NW LAB, BATTELLE BLVD, POB 999, RICHLAND, WA 99352 USA. RI Chapman, Elaine/K-8756-2012 NR 20 TC 1 Z9 1 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD JAN 20 PY 1993 VL 98 IS D1 BP 1113 EP 1122 DI 10.1029/92JD02474 PG 10 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA KJ594 UT WOS:A1993KJ59400011 ER PT J AU WUNDERLICH, B AF WUNDERLICH, B TI MOLECULAR-DYNAMICS SIMULATION AND THERMAL-ANALYSIS OF MACROMOLECULAR CRYSTALS SO THERMOCHIMICA ACTA LA English DT Article; Proceedings Paper CT 13TH NORDIC SYMP ON THERMAL ANALYSIS AND CALORIMETRY CY JUN 09-11, 1992 CL ROYAL INST TECHNOL, STOCKHOLM, SWEDEN HO ROYAL INST TECHNOL ID LINEAR MACROMOLECULES; HEAT-CAPACITIES; POLYETHYLENE AB Macromolecular crystals are not in equilibrium and their structure is governed by crystal structure and macroconformation rules. Our Advanced THermal Analysis System, ATHAS, has led in the last 15 years to the description of more than 150 polymers and polymer-related, small model compounds. The discussion of the entropy and the detailed study of heat capacities has resulted in better understanding of disorder and motion in many crystalline polymers. To get more insight, molecular dynamics simulations on supercomputers were used in cooperation with Drs. D. W. Noid and B. G. Sumpter of our institutions. At present, crystals with 9600 chain atoms can be simulated for times of up to 0.1 ns. The computed thermal effects agree with measurements, making the supercomputer a direct calorimetric simulator that links macroscopic observations with microscopic mechanics. C1 OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831. RP WUNDERLICH, B (reprint author), UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996, USA. NR 33 TC 1 Z9 1 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0040-6031 J9 THERMOCHIM ACTA JI Thermochim. Acta PD JAN 20 PY 1993 VL 214 IS 1 BP 103 EP 109 DI 10.1016/0040-6031(93)80044-B PG 7 WC Thermodynamics; Chemistry, Analytical; Chemistry, Physical SC Thermodynamics; Chemistry GA KK125 UT WOS:A1993KK12500016 ER PT J AU LYU, PC WEMMER, DE ZHOU, HX PINKER, RJ KALLENBACH, NR AF LYU, PC WEMMER, DE ZHOU, HX PINKER, RJ KALLENBACH, NR TI CAPPING INTERACTIONS IN ISOLATED ALPHA-HELICES - POSITION-DEPENDENT SUBSTITUTION EFFECTS AND STRUCTURE OF A SERINE-CAPPED PEPTIDE HELIX SO BIOCHEMISTRY LA English DT Article ID OCCURRING AMINO-ACIDS; THERMODYNAMIC PARAMETERS; POLYPEPTIDE CHAINS; FORMING TENDENCIES; COIL TRANSITION; STABILITY; PROTEINS; SPECTROSCOPY; PREFERENCES; RESIDUES AB The influence of an amino acid on the stability of alpha-helical structure depends on the position of the residue in the helix with respect to the ends. Short alpha helices in proteins are stabilized both by H-bonding of the main-chain NH and CO groups and by capping interactions between side chains and unfulfilled peptide groups at the N and C termini. Peptide models based on consensus position-dependent helix sequences allow one to model capping effects in isolated helices and to establish a base line for these interactions in proteins. We report here an extended series of substitutions in the cap positions of our peptide models and the solution structure of peptide S3, with serine at the N-cap position defined as the N-terminal residue with partly helix and partly coil conformation. The resulting model, determined by 2D H-1 NMR, is consistent with a structure at the N-cap involving H-bonding between the serine gamma oxygen and the peptide NH of the glutamic acid residue three amino acids toward the C terminus. A bifurcated H-bond of Ser O(gamma) with the NH of Asp5 is possible also, since this group is within interacting distance. This provides direct evidence that specific side-chain interactions with the main chain stabilize isolated alpha-helical structure. C1 NYU,DEPT CHEM,NEW YORK,NY 10003. LAWRENCE BERKELEY LAB,DIV STRUCT BIOL,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DEPT CHEM,BERKELEY,CA 94720. RI Zhou, Huan-Xiang/M-5170-2016 OI Zhou, Huan-Xiang/0000-0001-9020-0302 FU NIGMS NIH HHS [GM 40746, GM 14803] NR 31 TC 138 Z9 138 U1 2 U2 11 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD JAN 19 PY 1993 VL 32 IS 2 BP 421 EP 425 DI 10.1021/bi00053a006 PG 5 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA KH386 UT WOS:A1993KH38600006 PM 8422351 ER PT J AU DESIMONI, J BERNAS, H BEHAR, M LIN, XW WASHBURN, J LILIENTALWEBER, Z AF DESIMONI, J BERNAS, H BEHAR, M LIN, XW WASHBURN, J LILIENTALWEBER, Z TI ION-BEAM SYNTHESIS OF CUBIC FESI2 SO APPLIED PHYSICS LETTERS LA English DT Article AB Cubic FeSi2 precipitates were synthesized in Si (100) by room-temperature Fe ion implantation followed by Si 500 keV ion beam induced epitaxial crystallization at 320-degrees-C. High resolution electron microscopy and Rutherford backscattering/channeling techniques show that the cubic precipitates occur in both aligned (A) and twinned (B) types with a lattice parameter very similar to that of the Si ( 100) matrix. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP DESIMONI, J (reprint author), CTR SPECTROMETRIE NUCL & SPECTROMETRIE MASSE,BAT 108,F-91405 ORSAY,FRANCE. RI Liliental-Weber, Zuzanna/H-8006-2012 NR 9 TC 52 Z9 52 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 JAN 18 PY 1993 VL 62 IS 3 BP 306 EP 308 DI 10.1063/1.108969 PG 3 WC Physics, Applied SC Physics GA KG799 UT WOS:A1993KG79900034 ER PT J AU TAJIMA, N BONCHE, P FLOCARD, H HEENEN, PH WEISS, MS AF TAJIMA, N BONCHE, P FLOCARD, H HEENEN, PH WEISS, MS TI SELF-CONSISTENT CALCULATION OF CHARGE RADII OF PB ISOTOPES SO NUCLEAR PHYSICS A LA English DT Article ID LASER SPECTROSCOPY; SHAPE ISOMERISM; LEAD ISOTOPES; SHIFTS; NUCLEI; NEUTRON AB Charge radii of lead isotopes are calculated with the HF plus BCS method, using Skyrme forces (SkM*, SIII and SGII) for the mean field. When these forces are combined with a seniority pairing force, all of them fail to reproduce the experiment. Neither higher-order corrections, nor ground-state correlations due to the collective modes can resolve the discrepancy. However, by introducing a density-dependent pairing force quenched inside the nucleus, one can explain the odd-even staggering as well as the large kink of charge radii at Pb-208 when plotted versus A. C1 UNIV PARIS 11,INST PHYS NUCL,DIV PHYS THEOR,UNITE RECH,F-91406 ORSAY,FRANCE. CE SACLAY,SERV PHYS THEOR,F-91191 GIF SUR YVETTE,FRANCE. UNIV PARIS 06,CNRS,PARIS,FRANCE. UNIV TOKYO,INST PHYS,MEGURO KU,TOKYO 153,JAPAN. ULB,SERV PHYS NUCL THEOR,B-1050 BRUSSELS,BELGIUM. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 27 TC 96 Z9 97 U1 0 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 JAN 18 PY 1993 VL 551 IS 3 BP 434 EP 450 DI 10.1016/0375-9474(93)90456-8 PG 17 WC Physics, Nuclear SC Physics GA KN025 UT WOS:A1993KN02500004 ER PT J AU ROUSSELCHOMAZ, P COLONNA, N BLUMENFELD, Y LIBBY, B PEASLEE, GF DELIS, DN HANOLD, K MCMAHAN, MA MENG, JC SUI, QC WOZNIAK, GJ MORETTO, LG MADANI, H MARCHETTI, AA MIGNEREY, AC GUARINO, G SANTORUVO, N IORI, I BRADLEY, S AF ROUSSELCHOMAZ, P COLONNA, N BLUMENFELD, Y LIBBY, B PEASLEE, GF DELIS, DN HANOLD, K MCMAHAN, MA MENG, JC SUI, QC WOZNIAK, GJ MORETTO, LG MADANI, H MARCHETTI, AA MIGNEREY, AC GUARINO, G SANTORUVO, N IORI, I BRADLEY, S TI COMPLEX FRAGMENT PRODUCTION AND MULTIFRAGMENTATION IN LA-139-INDUCED REACTIONS AT 35, 40, 45 AND 55 MEV/U SO NUCLEAR PHYSICS A LA English DT Article DE C-12; AL-27; CA-40; CU; LA-139(LA-139,X); E = 35; 40; 45; 55 MEV/NUCLEON; MEASURED SIGMA(FRAGMENT E,THETA); (FRAGMENT) (FRAGMENT)-COIN; DEDUCED SOURCE VELOCITIES; CHARGE DISTRIBUTIONS ID HEAVY-ION COLLISIONS; MICROSCOPIC DESCRIPTION; EXCITATION-FUNCTIONS; COMPOUND NUCLEI; EMISSION; AL-27; SYSTEMS; MEV/NUCLEON; DETECTORS; BARRIERS AB Complex fragment emission (Z > 3) has been studied in the reactions of 35, 40, 45 and 55 MeV/u La-139+X. Charge, anguular, and energy distributions were measured inclusively and in coincidence with other complex fragments, and were used to extract source rapidities, velocity distributions, and cross sections. Multifragment events increase with both bombarding energy and entrance-channel mass asymmetry. The excitation functions for multifragment events rise strongly with excitation energy. These excitation functions are independent of the target-projectile combination and bombarding energy suggesting, the formation of an intermediate nuclear system, whose decay properties depend mainly on its excitation energy and angular momentum. C1 LAWRENCE BERKELEY LAB,DIV NUCL SCI,M-S 71-259,1 CYCLOTRON RD,BERKELEY,CA 94720. UNIV MARYLAND,DEPT CHEM,COLL PK,MD 20742. INFN,SEZ BARI,I-70126 BARI,ITALY. UNIV MILAN,I-20133 MILAN,ITALY. KAMAN SCI,ALEXANDRIA,VA 22303. RI Mignerey, Alice/D-6623-2011 NR 52 TC 16 Z9 16 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 JAN 18 PY 1993 VL 551 IS 3 BP 508 EP 540 DI 10.1016/0375-9474(93)90460-F PG 33 WC Physics, Nuclear SC Physics GA KN025 UT WOS:A1993KN02500008 ER PT J AU ZHU, XJ LOUIE, SG AF ZHU, XJ LOUIE, SG TI WIGNER CRYSTALLIZATION IN THE FRACTIONAL QUANTUM HALL REGIME - A VARIATIONAL QUANTUM MONTE-CARLO STUDY SO PHYSICAL REVIEW LETTERS LA English DT Article ID STRONG MAGNETIC-FIELD; DENSITY-WAVE STATE; DIMENSIONAL ELECTRON-GAS; 2-DIMENSIONAL ELECTRONS; INSULATING PHASE; GROUND-STATE; LIQUID; FREQUENCY; CRYSTAL; ENERGY AB Using a variational quantum Monte Carlo method, we study the two-dimensional Wigner crystal induced by a strong magnetic field in the fractional quantum Hall effect regime. Effects of exchange, intra-Landau-level correlation, and inter-Landau-level mixing on the total energy and their dependence on the carrier mass and magnetic field strength are calculated. Our results support that the recently observed reentrant behavior to an insulating phase around nu = 1/3 in p-doped GaAs/AlGaAs is a consequence of an increased stability of the Wigner crystal due to the effects of Landau-level mixing. C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP ZHU, XJ (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 32 TC 56 Z9 56 U1 2 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 JAN 18 PY 1993 VL 70 IS 3 BP 335 EP 338 DI 10.1103/PhysRevLett.70.335 PG 4 WC Physics, Multidisciplinary SC Physics GA KG618 UT WOS:A1993KG61800022 ER PT J AU SIDDONS, DP BERGMANN, U HASTINGS, JB AF SIDDONS, DP BERGMANN, U HASTINGS, JB TI TIME-DEPENDENT POLARIZATION IN MOSSBAUER EXPERIMENTS WITH SYNCHROTRON RADIATION - SUPPRESSION OF ELECTRONIC SCATTERING SO PHYSICAL REVIEW LETTERS LA English DT Article AB The resonant, forward scattering of x rays from Fe-57 nuclei is strongly polarization dependent. The broad-band excitation provided by synchrotron radiation (SR) results in an interesting time-dependent polarization mixing, which we will discuss. Further we demonstrate that by selecting only the component of the transmitted radiation which has a 90-degrees rotated plane of polarization, the nonresonant (nonrotated) transmitted intensity can be substantially reduced. This new technique will allow full utilization of new powerful SR sources currently under construction. RP SIDDONS, DP (reprint author), BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE,UPTON,NY 11973, USA. NR 16 TC 30 Z9 30 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 18 PY 1993 VL 70 IS 3 BP 359 EP 362 DI 10.1103/PhysRevLett.70.359 PG 4 WC Physics, Multidisciplinary SC Physics GA KG618 UT WOS:A1993KG61800028 ER PT J AU JAYAKUMAR, R FLEISCHMANN, HH ZWEBEN, SJ AF JAYAKUMAR, R FLEISCHMANN, HH ZWEBEN, SJ TI COLLISIONAL AVALANCHE EXPONENTIATION OF RUNAWAY ELECTRONS IN ELECTRIFIED PLASMAS SO PHYSICS LETTERS A LA English DT Article ID BREMSSTRAHLUNG EMISSION; TOKAMAK; PLT; DISRUPTIONS; JET AB In contrast to earlier expectations, it is estimated that generation of runaway electrons from close collisions of existing runaways with cold plasma electrons can be significant even for small electric fields, whenever runaways can gain energies of about 20 MeV or more. In that case, the runaway population will grow exponentially with the energy spectrum showing an exponential decrease towards higher energies. Energy gains of the required magnitude may occur in large tokamak devices as well as in cosmic-ray generation. C1 CORNELL UNIV, SCH APPL & ENGN PHYS, ITHACA, NY 14853 USA. PRINCETON UNIV, PLASMA PHYS LAB, PRINCETON, NJ 08544 USA. NR 39 TC 78 Z9 78 U1 1 U2 14 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9601 EI 1873-2429 J9 PHYS LETT A JI Phys. Lett. A PD JAN 18 PY 1993 VL 172 IS 6 BP 447 EP 451 DI 10.1016/0375-9601(93)90237-T PG 5 WC Physics, Multidisciplinary SC Physics GA KJ378 UT WOS:A1993KJ37800010 ER PT J AU KOUTNY, LB YEUNG, ES AF KOUTNY, LB YEUNG, ES TI EXPERT SYSTEM FOR DATA ACQUISITION TO ACHIEVE A CONSTANT SIGNAL-TO-NOISE RATIO - APPLICATION TO IMAGING OF DNA SEQUENCING GELS SO ANALYTICAL CHEMISTRY LA English DT Article ID ELECTROPHORETIC SEPARATION; RESTRICTION FRAGMENTS; NUCLEIC-ACID; COMPUTER; AUTORADIOGRAPHS; DENSITOMETRY; CAMERA; VIDEO AB Normally, data acquisition and processing in chemical measurements are based on equal time (effort) for each data point. This leads to uneven signal-to-noise ratios (S/N) for each point. We present an expert system which decides in real time whether adequate S/N has been achieved for each point. If so, that data point will be omitted in all further acquisition or processing operations, greatly increasing the overall efficiency. The special case of analyzing DNA sequencing gels is tested with this scheme. A factor of 7.6 reduction in effort is demonstrated for a data set of 384 X 250 pixels, which normally would require 6 million sequential operations (64 frames). C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. NR 22 TC 9 Z9 9 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 JAN 15 PY 1993 VL 65 IS 2 BP 148 EP 152 DI 10.1021/ac00050a010 PG 5 WC Chemistry, Analytical SC Chemistry GA KG778 UT WOS:A1993KG77800012 PM 8430894 ER PT J AU MILOFSKY, RE YEUNG, ES AF MILOFSKY, RE YEUNG, ES TI NATIVE FLUORESCENCE DETECTION OF NUCLEIC-ACIDS AND DNA RESTRICTION FRAGMENTS IN CAPILLARY ELECTROPHORESIS SO ANALYTICAL CHEMISTRY LA English DT Article ID ZONE ELECTROPHORESIS; GEL-ELECTROPHORESIS; RAPID SEPARATION; COLUMN DETECTION; OLIGONUCLEOTIDES; RESOLUTION; CHROMATOGRAPHY; NUCLEOTIDES; CELL AB A sensitive laser-induced fluorescence (LIF) detection scheme for native nucleic acids and DNA restriction fragments separated by capillary electrophoresis (CE) has been developed. The 275.4-nm line from an argon ion laser or the 248-nm line from a waveguide KrF laser is used to excite native fluorescence. Detection limits for guanosine and adenosine monophosphate (1.5 X 10(-8) and 5 X 10(-8) M, respectively) are up to 3 orders of magnitude lower than UV detection. Sensitivity for native fluorescence of DNA restriction fragments in gel-filled capillaries rivals that of UV absorption. The decrease in performance in gel-filled separations using LIF detection is caused by the high background associated with gel fluorescence, as well as gel quenching of the fluorescence emission. The development of gel exhibiting lower background fluorescence or off-column coupling should lead to significant improvements in sensitivity over UV detection. This novel and practical system enables, for the first time, the sensitive detection of nucleic-acid-containing compounds without the need for fluorescence labeling. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. NR 49 TC 57 Z9 57 U1 0 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD JAN 15 PY 1993 VL 65 IS 2 BP 153 EP 157 DI 10.1021/ac00050a011 PG 5 WC Chemistry, Analytical SC Chemistry GA KG778 UT WOS:A1993KG77800013 PM 8381620 ER PT J AU KOUTNY, LB YEUNG, ES AF KOUTNY, LB YEUNG, ES TI ONLINE DETECTION OF PROTEINS IN GEL-ELECTROPHORESIS BY ULTRAVIOLET-ABSORPTION AND BY NATIVE FLUORESCENCE UTILIZING A CHARGE-COUPLED DEVICE IMAGING-SYSTEM SO ANALYTICAL CHEMISTRY LA English DT Note ID FLUOROMETRIC DETECTION; POLYACRYLAMIDE C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. NR 17 TC 19 Z9 19 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD JAN 15 PY 1993 VL 65 IS 2 BP 183 EP 187 DI 10.1021/ac00050a017 PG 5 WC Chemistry, Analytical SC Chemistry GA KG778 UT WOS:A1993KG77800019 ER PT J AU PARKER, GA PACK, RT LAGANA, A AF PARKER, GA PACK, RT LAGANA, A TI ACCURATE 3D-QUANTUM REACTIVE PROBABILITIES OF LI+FH SO CHEMICAL PHYSICS LETTERS LA English DT Article ID POTENTIAL-ENERGY SURFACE; REACTION CROSS-SECTIONS; SLIDING MASS MODEL; INDIRECT MICROSCOPIC MECHANISMS; REAGENT ROTATION; LI+HF REACTION; SCATTERING; DYNAMICS AB Accurate three-dimensional quantum reactive scattering calculations have been carried out at zero total angular momentum (J = 0) for the ''three-different-atom non-collinearly dominated'' Li+ HF reaction. The main features of the reactive probability for reactants in the ground vibrational state are discussed. C1 LOS ALAMOS NATL LAB, DIV THEORET T12, LOS ALAMOS, NM 87545 USA. UNIV PERUGIA, DIPARTIMENTO CHIM, I-06100 PERUGIA, ITALY. RP PARKER, GA (reprint author), UNIV OKLAHOMA, DEPT PHYS & ASTRON, NORMAN, OK 73019 USA. RI Parker, Gregory/A-4327-2009; Lagana, Antonio/E-8215-2014 OI Parker, Gregory/0000-0002-0225-8887; Lagana, Antonio/0000-0002-3886-7342 NR 43 TC 39 Z9 39 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD JAN 15 PY 1993 VL 202 IS 1-2 BP 75 EP 81 DI 10.1016/0009-2614(93)85353-P PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KH008 UT WOS:A1993KH00800013 ER PT J AU WERST, DW AF WERST, DW TI SOLVENT EFFECTS IN NONPOLAR-SOLVENTS - RADICAL-ANION REACTIONS SO CHEMICAL PHYSICS LETTERS LA English DT Article ID ELECTRON-SPIN-RESONANCE; DETECTED MAGNETIC-RESONANCE; PULSE-RADIOLYSIS; CATION RADICALS; DERIVATIVES AB Dimer radical anions, formed by anion-molecule reactions between octafluoronaphthalene and 1,2,4,5-tetrafluorobenzene and their respective radical anions, are observed in n-hexane solvent. The radical anions are characterized by their EPR spectra obtained by the time-resolved fluorescence-detected magnetic resonance technique. In toluene solvent the dimer anions are not formed. Rapid electron-exchange reactions occur instead in at least one case. Possible reasons why the solvent affects the anion reaction mechanism are discussed. RP WERST, DW (reprint author), ARGONNE NATL LAB, DIV CHEM, ARGONNE, IL 60439 USA. NR 36 TC 18 Z9 18 U1 0 U2 0 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 JAN 15 PY 1993 VL 202 IS 1-2 BP 101 EP 107 DI 10.1016/0009-2614(93)85357-T PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KH008 UT WOS:A1993KH00800017 ER PT J AU CHEN, CH PHILLIPS, RC MCCANN, MP AF CHEN, CH PHILLIPS, RC MCCANN, MP TI DESORPTION SPECTRA OF LASER ABLATION OF TL-CA-BA-CU-O SUPERCONDUCTORS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID CHEMICAL VAPOR-DEPOSITION; THIN-FILMS; ZERO RESISTANCE; TL2O3 VAPOR; SYSTEM; EVAPORATION; TL2CABA2CU2OY; DIFFUSION; 120-K AB Quantitative measurements of desorbed ions and neutral molecules by a quadruple mass spectrometer from laser ablation of Tl-Ca-Ba-Cu-O were obtained. The results indicate that more neutral atoms and molecules desorbed than the corresponding ions. More elementary ions desorbed than the corresponding oxide compounds. RP CHEN, CH (reprint author), OAK RIDGE NATL LAB,CHEM PHYS SECT,OAK RIDGE,TN 37831, USA. NR 30 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 15 PY 1993 VL 73 IS 2 BP 522 EP 525 DI 10.1063/1.353361 PG 4 WC Physics, Applied SC Physics GA KG476 UT WOS:A1993KG47600005 ER PT J AU LU, XP NILSSON, O FRICKE, J PEKALA, RW AF LU, XP NILSSON, O FRICKE, J PEKALA, RW TI THERMAL AND ELECTRICAL-CONDUCTIVITY OF MONOLITHIC CARBON AEROGELS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID ORGANIC AEROGELS; TRANSPORT AB The thermal and electrical conductivity of monolithic carbon aerogels was investigated at room temperature. Results showed both the solid thermal conductivity and the electrical conductivity scale with the density in the range between 60 and 650 kg m-3. The scaling exponents for the two conductivities have identical values of 1.5. For a density of 82 kg m-3 a thermal conductivity of 0.029 W m-1 K-1 in air and 0.018 W m-1 K-1 after evacuation was found. C1 LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94550. RP LU, XP (reprint author), UNIV WURZBURG,INST PHYS,W-8700 WURZBURG,GERMANY. NR 29 TC 96 Z9 98 U1 7 U2 33 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 JAN 15 PY 1993 VL 73 IS 2 BP 581 EP 584 DI 10.1063/1.353367 PG 4 WC Physics, Applied SC Physics GA KG476 UT WOS:A1993KG47600011 ER PT J AU DING, D PURETZKY, AA COMPTON, RN AF DING, D PURETZKY, AA COMPTON, RN TI MULTIPHOTON IONIZATION DISSOCIATION OF OSMIUM-TETROXIDE SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID PHOTO-DISSOCIATION; FRAGMENTATION; EXCITATION; DYNAMICS; FE(CO)5; STATES; ATOMS; RUO4; OSO4 AB The mechanisms leading to laser multiphoton ionization and dissociation (MPI/MPD) of osmium tetroxide (OSO4) have been investigated from measurements of the kinetic energies of product ions (Os+, Os2+, OsO+, O2+, O+) and photoelectrons as a function of the laser wavelength. Neutral channels, intermediate to the dominant Os+ ionization channel, such as OSO4 --> OSO4-n + nO are examined using resonance-enhanced multiphoton ionization (REMPI) of the fast O atoms. Equipartition of the available photon energy among the fragments is observed. The wavelength dependence of the Os+ ion signal suggests that one or more of the steps leading to Os+ ions involve molecular ions and/or excited neutral atoms. The observed preponderance of very slow (<0.2 eV) electrons also supports this interpretation. Os2+ is shown to result primarily from REMPI of Os+. C1 RUSSIAN ACAD SCI,INST SPECTROSCOPY,TROITSK 142092,RUSSIA. OAK RIDGE NATL LAB,CHEM PHYS SECT,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT MED,KNOXVILLE,TN 37996. RP DING, D (reprint author), JILIN UNIV,CHANGCHUN 130023,PEOPLES R CHINA. RI Puretzky, Alexander/B-5567-2016 OI Puretzky, Alexander/0000-0002-9996-4429 NR 29 TC 2 Z9 2 U1 1 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 JAN 15 PY 1993 VL 98 IS 2 BP 951 EP 958 DI 10.1063/1.464258 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KH442 UT WOS:A1993KH44200020 ER PT J AU KLOTS, CE AF KLOTS, CE TI UNIMOLECULAR DECOMPOSITION IN A SPHERICALLY SYMMETRICAL POTENTIAL SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID CLUSTER IONS; REACTIVITY; DECAY; MODEL AB Unimolecular decompositions are considered where the interaction between the separating fragments can be described by a function solely of their radial separation. It is shown how previous treatments, confined to idealized models, can be generalized. Kinetic energy distributions and rate constants may be calculated accordingly when the angular momentum is low. Applications to evaporation from van der Waals molecules are noted. A limit to the interaction parameters is then found where these properties become ''thermodynamic,'' despite the absence of angular momentum. This result is used to obtain a general form for the effects of angular momentum on a rate constant. It reduces to traditional ideas in the hard-sphere limit. RP KLOTS, CE (reprint author), OAK RIDGE NATL LAB,CHEM PHYS SECT,OAK RIDGE,TN 37831, USA. NR 18 TC 48 Z9 48 U1 1 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 JAN 15 PY 1993 VL 98 IS 2 BP 1110 EP 1115 DI 10.1063/1.464335 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KH442 UT WOS:A1993KH44200035 ER PT J AU CURTISS, LA RAGHAVACHARI, K POPLE, JA AF CURTISS, LA RAGHAVACHARI, K POPLE, JA TI GAUSSIAN-2 THEORY USING REDUCED MOLLER-PLESSET ORDERS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID MOLECULAR-ENERGIES; 2ND-ROW COMPOUNDS AB Two variations of Gaussian-2 (G2) theory are presented. In the first, referred to as G2 (MP2) theory, the basis-set-extension energy corrections are obtained at the 2nd order Moller-Plesset (MP2) level and in the second, referred to as G2(MP3) theory, they are obtained at the MP3 level. The methods are tested out on the set of 125 systems used for validation of G2 theory [J. Chem Phys 94, 7221 (1991)]. The average absolute deviation of the G2(MP2) and G2(MP3) theories from experiment are 1.58 and 1.52 kcal/mol, respectively, compared to 1.21 kcal/mol for G2 theory. The new methods provide significant savings in computational time and disk storage. C1 AT&T BELL LABS,MURRAY HILL,NJ 07974. CARNEGIE MELLON UNIV,DEPT CHEM,PITTSBURGH,PA 15213. RP CURTISS, LA (reprint author), ARGONNE NATL LAB,DEPT MAT SCI,DIV CHEM TECHNOL,ARGONNE,IL 60439, USA. NR 11 TC 1314 Z9 1325 U1 1 U2 22 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 JAN 15 PY 1993 VL 98 IS 2 BP 1293 EP 1298 DI 10.1063/1.464297 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KH442 UT WOS:A1993KH44200051 ER PT J AU WOON, DE DUNNING, TH AF WOON, DE DUNNING, TH TI GAUSSIAN-BASIS SETS FOR USE IN CORRELATED MOLECULAR CALCULATIONS .3. THE ATOMS ALUMINUM THROUGH ARGON SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ANO BASIS-SETS; GENERAL CONTRACTION; WAVE-FUNCTIONS; ROW ATOMS; ORBITALS AB Correlation consistent and augmented correlation consistent basis sets have been determined for the second row atoms aluminum through argon. The methodology, originally developed for the first row atoms [T. H. Dunning, Jr., J. Chem. Phys. 90, (1989)] is first applied to sulfur. The exponents for the polarization functions (dfgh) are systematically optimized for a correlated wave function (HF + 1 + 2). The (sp) correlation functions are taken from the appropriate HF primitive sets; it is shown that these functions differ little from the optimum functions. Basis sets of double zeta [4s3p1d], triple zeta [5s4p2d1f], and quadruple zeta [6s5p3d2f1g] quality are defined. Each of these sets is then augmented with diffuse functions to better describe electron affinities and other molecular properties: s and p functions were obtained by optimization for the anion HF energy, while an additional polarization function for each symmetry present in the standard set was optimized for the anion HF + 1 + 2 energy. The results for sulfur are then used to assist in determining double zeta, triple zeta, and quadruple zeta basis sets for the remainder of the second row of the p block. RP WOON, DE (reprint author), PACIFIC NW LAB, MOLEC SCI RES CTR, BOX 999, RICHLAND, WA 99352 USA. NR 24 TC 6248 Z9 6278 U1 20 U2 193 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 JAN 15 PY 1993 VL 98 IS 2 BP 1358 EP 1371 DI 10.1063/1.464303 PG 14 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KH442 UT WOS:A1993KH44200057 ER PT J AU GRUBER, JB SHAVIV, R WESTRUM, EF BURRIEL, R BEAUDRY, BJ PALMER, PE AF GRUBER, JB SHAVIV, R WESTRUM, EF BURRIEL, R BEAUDRY, BJ PALMER, PE TI THERMOPHYSICAL PROPERTIES OF THE LANTHANIDE SESQUISULFIDES .4. SCHOTTKY CONTRIBUTIONS, MAGNETIC, AND ELECTRONIC-PROPERTIES OF EPSILON-PHASE YB2S3 AND LU2S3 SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article AB The heat capacities of epsilon-phase Yb2S3 and Lu2S3 have been determined from 6 to 350 K and their thermodynamic properties evaluated. The resolution of the Schottky and magnetic properties by evaluation of the lattice heat capacity is shown to be in accord with spectroscopically determined energy levels. The lattice heat capacity of Yb2S3 was determined by means of the Komada-Westrum phonon distribution model. Excess heat-capacity contributions were thus evaluated and analyzed as Schottky and magnetic heat capacities. A phase transition associated with magnetic ordering was detected in the heat capacity of Yb2S3 near 7 K with an entropy content of 0.68R. The entropies at 298.15 K are 22.77R and 19.74R for Yb2S3 and for Lu2S3. C1 UNIV MICHIGAN, DEPT CHEM, ANN ARBOR, MI 48109 USA. UNIV ZARAGOZA, CSIC, INST CIENCIA MAT ARAGON, E-50009 ZARAGOZA, SPAIN. IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. RP GRUBER, JB (reprint author), SAN JOSE STATE UNIV, DEPT PHYS, SAN JOSE, CA 95192 USA. NR 17 TC 7 Z9 7 U1 1 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 JAN 15 PY 1993 VL 98 IS 2 BP 1458 EP 1463 DI 10.1063/1.465080 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KH442 UT WOS:A1993KH44200065 ER PT J AU DAWSON, SP CHEN, S DOOLEN, GD AF DAWSON, SP CHEN, S DOOLEN, GD TI LATTICE BOLTZMANN COMPUTATIONS FOR REACTION-DIFFUSION EQUATIONS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID GAS AUTOMATA; OSCILLATIONS; SYSTEMS AB A lattice Boltzmann model for reaction-diffusion systems is developed. The method provides an efficient computational scheme for simulating a variety of problems described by the reaction-diffusion equations. Diffusion phenomena, the decay to a limit cycle, and the formation of Turing patterns are studied. The results of lattice Boltzmann calculations are compared with the lattice gas method and with theoretical predictions, showing quantitative agreement. The model is extended to include velocity convection in chemically reacting fluid flows. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP DAWSON, SP (reprint author), LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545, USA. RI Chen, Shiyi/A-3234-2010; OI Ponce Dawson, Silvina/0000-0001-6550-4267 NR 20 TC 240 Z9 248 U1 2 U2 28 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 JAN 15 PY 1993 VL 98 IS 2 BP 1514 EP 1523 DI 10.1063/1.464316 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KH442 UT WOS:A1993KH44200072 ER PT J AU YETHIRAJ, A CURRO, JG SCHWEIZER, KS MCCOY, JD AF YETHIRAJ, A CURRO, JG SCHWEIZER, KS MCCOY, JD TI MICROSCOPIC EQUATIONS OF STATE OF POLYETHYLENE - HARD-CHAIN CONTRIBUTION TO THE PRESSURE SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID LIQUID NORMAL-BUTANE; MOLECULAR-DYNAMICS SIMULATION; PAIR CORRELATION-FUNCTIONS; MONTE-CARLO SIMULATIONS; 2ND VIRIAL-COEFFICIENTS; INTEGRAL-EQUATION; POLYMER MELTS; PERTURBATION-THEORY; CLASSICAL FLUIDS; STATISTICAL THERMODYNAMICS AB The athermal contribution to the pressure of polyethylene is investigated via integral equations and mean field generalized Flory-type theories. The molecules are modeled as fused-hard-sphere chains with fixed bond lengths and bond angles; torsional rotations are treated via the rotational isomeric state approximation with literature values for the trans-gauche energies. The hard sphere diameter is obtained by matching structure factor predictions of the polymer reference interaction site model (PRISM) theory for hard chains to data from wide-angle scattering experiments. In all, five hard chain equations of state are investigated: three via different thermodynamic routes in the PRISM theory, and two via different extensions (to fused-sphere chains) of the generalized Flory-dimer (GFD) theory. The integral equation approaches consist of a free energy ''charging'' route, the compressibility route, and the ''wall'' route (where the pressure is obtained from the density profile of the fluid at a hard wall). The two GFD approaches correspond to different choices for the reference monomer and dimer fluids required in the theory. Each of the five equations of state results in significantly different predictions for the pressure. The predictions of the various equations relative to each other are nearly independent of chain length, and this allows us to draw conclusions for polymeric fluids (where simulation results are not available) by testing the performance of the equations for diatomics (where simulation results are available). We thus speculate that the charging route overestimates the pressure, the compressibility route underestimates the pressure, and the GFD and wall equations of state are the most accurate. C1 UNIV ILLINOIS, MAT RES LAB, URBANA, IL 61801 USA. SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. NEW MEXICO INST MIN & TECHNOL, DEPT MAT & MET ENGN, SOCORRO, NM 87801 USA. RP YETHIRAJ, A (reprint author), UNIV ILLINOIS, DEPT MAT SCI & ENGN, 1304 W GREEN ST, URBANA, IL 61801 USA. RI McCoy, John/B-3846-2010; OI McCoy, John/0000-0001-5404-1404; Yethiraj, Arun/0000-0002-8579-449X NR 86 TC 57 Z9 57 U1 2 U2 11 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 JAN 15 PY 1993 VL 98 IS 2 BP 1635 EP 1646 DI 10.1063/1.464280 PG 12 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KH442 UT WOS:A1993KH44200086 ER PT J AU GUNDEL, LA MAHANAMA, KRR DAISEY, JM AF GUNDEL, LA MAHANAMA, KRR DAISEY, JM TI FRACTIONATION OF POLAR ORGANIC EXTRACTS OF AIRBORNE PARTICULATE MATTER USING CYANOPROPYL-BONDED SILICA IN SOLID-PHASE EXTRACTION SO JOURNAL OF CHROMATOGRAPHY LA English DT Article; Proceedings Paper CT SYMP ON SOLID-PHASE EXTRACTION IN ENVIRONMENTAL AND CLINICAL CHEMISTRY / 203RD NATIONAL MEETING OF THE AMERICAN CHEMICAL SOC CY APR 05-10, 1992 CL SAN FRANCISCO, CA SP AMER CHEM SOC ID MUTAGENICITY; CHROMATOGRAPHY; MIXTURES AB A mg-scale fractionation method has been developed for polar organic matter in airborne particles. The method gives reproducibly good recoveries of mass while avoiding the use of water or salts. Cyanopropyl-bonded silica solid-phase extraction (SPE) columns were used to fractionate a mixture of standard compounds and acetone-soluble extracts from particles collected in Elizabeth, NJ, USA and from National Institute of Standards and Technology Standard Reference Material SRM 1649 (urban air particles). Critical factors proved to be reducing the polarity of the extract before its application to the column and pre-wetting the column with n-hexane. Ten fractions were eluted with solvent mixtures of increasing polarity, ranging from n-hexane to methanol. Blank-corrected mass recoveries were 95 and 98% for the Elizabeth, NJ, USA and SRM 1649 extracts, respectively. RP GUNDEL, LA (reprint author), LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,BERKELEY,CA 94720, USA. NR 16 TC 13 Z9 14 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR PD JAN 15 PY 1993 VL 629 IS 1 BP 75 EP 82 DI 10.1016/0021-9673(93)80356-D PG 8 WC Chemistry, Analytical SC Chemistry GA KJ168 UT WOS:A1993KJ16800010 ER PT J AU GRUJICIC, M TANGRILA, S CAVIN, OB PORTER, WD HUBBARD, CR AF GRUJICIC, M TANGRILA, S CAVIN, OB PORTER, WD HUBBARD, CR TI EFFECT OF IRON ADDITIONS ON STRUCTURE OF LAVES PHASES IN NB-CR-FE ALLOYS SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article AB The effect of iron additions on the stability of various Laves phases in the Nb-Cr base system has been examined. In the binary Nb-Cr system a hexagonal (C14) Laves phase exists at temperatures above approximately 1860 K, and undergoes a shear-like martensitic transformation to a face centered cubic (C15) Laves phase on cooling to room temperature. Addition of iron promotes formation of an additional phase, the dihexagonal (C36) Laves phase. In alloys with a lower iron content (below approximately 5 wt.%), the C36 phase forms at higher temperatures. In addition, the C15 phase begins to form on cooling to room temperature. In sharp contrast, in alloys with a higher iron content, only the C14 --> C36 phase transformation takes place in the entire temperature range studied (RT 1473 K). These findings were rationalized on the basis of the effects of chemical energy change and elastic strain energy on magnitude of the activation energy for martensitic transformation. C1 OAK RIDGE NATL LAB, HIGH TEMP MAT LAB, OAK RIDGE, TN 37831 USA. RP GRUJICIC, M (reprint author), CLEMSON UNIV, DEPT MECH ENGN, CTR ADV MFG, CLEMSON, SC 29634 USA. NR 11 TC 31 Z9 34 U1 0 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD JAN 15 PY 1993 VL 160 IS 1 BP 37 EP 48 DI 10.1016/0921-5093(93)90495-Z PG 12 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA KJ268 UT WOS:A1993KJ26800005 ER PT J AU JONES, RH SIMONEN, EP AF JONES, RH SIMONEN, EP TI STAGE-I STRESS-CORROSION CRACKING BEHAVIOR SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article ID TYPE-304 STAINLESS-STEEL; GROWTH; ENVIRONMENTS; CHEMISTRY; NICKEL; MODEL; IRON AB Stage I stress corrosion cracking usually exhibits a very strong stress intensity (K) dependence with Paris Law exponents (m) of up to 24. Existing stress corrosion cracking models do not adequately describe the stage I regime, but a recently developed salt film dissolution model was found to give an excellent correlation with experimentally determined stage I behavior for Ni. Model calculations indicate that the crack velocity in this regime is controlled by transport through a salt film and that the K dependence results from crack opening controlled salt film dissolution. In many materials there is a suggestion that the value of m is a function of the local crack tip chemistry and crack opening displacement or crack angle. RP JONES, RH (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 26 TC 8 Z9 8 U1 1 U2 3 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD JAN 15 PY 1993 VL 160 IS 1 BP 127 EP 136 DI 10.1016/0921-5093(93)90505-9 PG 10 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA KJ268 UT WOS:A1993KJ26800015 ER PT J AU ZHANG, RS BENZVI, I XIE, JL AF ZHANG, RS BENZVI, I XIE, JL TI A SELF-ADAPTIVE FEEDFORWARD RF CONTROL-SYSTEM FOR LINACS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB The design and performance of a self-adaptive feedforward rf control system are reported. The system was built for the linac of the Accelerator Test Facility (ATF) at Brookhaven National Laboratory. Variables of time along the linac macropulse, such as field or phase are discretized and represented as vectors. Upon turn-on or after a large change in the operating-point, the control system acquires the response of the system to test signal vectors and generates a linearized system response matrix. During operation an error vector is generated by comparing the linac variable vectors and a target vector. The error vector is multiplied by the inverse of the system's matrix to generate a correction vector is added to an operating point vector. This control system can be used to control a klystron to produce flat rf amplitude and phase pulses, to control a rf cavity to reduce the rf field fluctuation, and to compensate the energy spread among bunches in a rf linac. Beam loading effects can be corrected and a programmed ramp can be produced. The performance of the control system has been evaluated on the control of a klystron's output as well as an rf cavity. Both amplitude and phase have been regulated simultaneously. In initial tests, the rf output from a klystron has been regulated to an amplitude fluctuation of less than +/- 0.3% and phase variation of less than +/- 0.6-degrees. The rf field of the ATF's photo-cathode microwave gun cavity has been regulated to +/- 0.5% in amplitude and simultaneously to +/- 1-degrees in phase. Regulating just the rf field amplitude in the rf gun cavity, we have achieved amplitude fluctuation of less than +/- 0.2%. C1 NSLS,BROOKHAVEN NATL LAB,UPTON,NY 11973. NR 10 TC 11 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 JAN 15 PY 1993 VL 324 IS 3 BP 421 EP 428 DI 10.1016/0168-9002(93)91045-O PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KG703 UT WOS:A1993KG70300002 ER PT J AU SULLIVAN, JP RAWOOLSULLIVAN, MW BOISSEVAIN, JG FOX, D GAVRON, A HOLZSCHEITER, K JACAK, BV SIMONGILLO, J SONDHEIM, WE VANHECKE, H WOLF, B WOLF, KL AF SULLIVAN, JP RAWOOLSULLIVAN, MW BOISSEVAIN, JG FOX, D GAVRON, A HOLZSCHEITER, K JACAK, BV SIMONGILLO, J SONDHEIM, WE VANHECKE, H WOLF, B WOLF, KL TI RESPONSE OF A SAMPLING CALORIMETER TO LOW-ENERGY PIONS, MUONS, AND POSITRONS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID TRUE ABSORPTION; CROSS-SECTIONS; SCINTILLATOR; SCATTERING; NUCLEI; CERN AB Measurements of the response of the participant calorimeter to 250-400 MeV/c pi+, mu-, and e+ are described. The participant calorimeter is a Pb/Fe/scintillator sampling calorimeter with a novel wavelength shifting fiber optic readout which is used in experiment 814 at Brookhaven National Laboratory. The e+/pi+ response ratio at 250-400 MeV/c is larger than it is at higher momenta. Previous measurements of the e/pi response ratio with sampling calorimeters found that the value decreased as the particle energies were reduced below about 1 GeV. This difference is attributed to the different absorption probabilities for pi+ and pi- at low momentum. C1 TEXAS A&M UNIV SYST,COLL STN,TX 77843. RP SULLIVAN, JP (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 19 TC 3 Z9 3 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 JAN 15 PY 1993 VL 324 IS 3 BP 441 EP 448 DI 10.1016/0168-9002(93)91048-R PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KG703 UT WOS:A1993KG70300005 ER PT J AU BAECHLER, J BOSTEELS, M BUNCIC, P BOCK, R DIMAURO, A FABRE, JP FACCHINI, N FERORELLI, R HECK, W HOFFMANN, M KONCUL, M LEVINE, M LJUBICIC, A NAPPI, E PAIC, G PANAGIOTOU, A POSA, F ROLAND, G RUNGE, K SANDOVAL, A SCOGNETTI, T SCHMOETTEN, E STOCK, R TOMASICCHIO, G VASILEIADIS, G VRANIC, D WENSVEEN, M AF BAECHLER, J BOSTEELS, M BUNCIC, P BOCK, R DIMAURO, A FABRE, JP FACCHINI, N FERORELLI, R HECK, W HOFFMANN, M KONCUL, M LEVINE, M LJUBICIC, A NAPPI, E PAIC, G PANAGIOTOU, A POSA, F ROLAND, G RUNGE, K SANDOVAL, A SCOGNETTI, T SCHMOETTEN, E STOCK, R TOMASICCHIO, G VASILEIADIS, G VRANIC, D WENSVEEN, M TI A LARGE AREA OPTICAL IMAGING UV DETECTOR OPERATING WITH TMAE AT 48-DEGREES-C SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB We describe the multistep avalanche chamber (MSAC) used in the experiment NA35 at CERN as photon detector of a ring imaging Cherenkov counter (RICH) that upgraded the experimental setup of a vertex streamer chamber by providing particle identification in the 1.5-3.5 GeV/c region. The chamber design contains some innovative technical solutions to limit the sparking rate and to allow the sensitive area to be larger than the present 50 x 50 cm 2. The detector is read out optically using a CCD camera in conjunction with a system of light intensifiers, since the optical readout offers a convenient way to record events in a two-dimensional array. Construction details and test results are discussed. C1 INFN,BARI,ITALY. BNL,UPTON,TX. GSI DARMSTADT,DARMSTADT,GERMANY. CERN,CH-1211 GENEVA 23,SWITZERLAND. UNIV FRANKFURT,W-6000 FRANKFURT,GERMANY. UNIV FREIBURG,W-7800 FREIBURG,GERMANY. RUDJER BOSKOVIC INST,YU-41001 ZAGREB,CROATIA. POLITECN BARI,BARI,ITALY. RP BAECHLER, J (reprint author), UNIV ATHENS,ATHENS,GREECE. NR 9 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 JAN 15 PY 1993 VL 324 IS 3 BP 449 EP 460 DI 10.1016/0168-9002(93)91049-S PG 12 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KG703 UT WOS:A1993KG70300006 ER PT J AU AMATO, S NETO, JRTD DEMIRANDA, J JAMES, C SUMMERS, DJ BRACKER, SB AF AMATO, S NETO, JRTD DEMIRANDA, J JAMES, C SUMMERS, DJ BRACKER, SB TI THE E791 PARALLEL ARCHITECTURE DATA ACQUISITION-SYSTEM SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID FERMILAB AB To collect data for the study of charm particle decays, we built a high speed data acquisition system for use with the E791 magnetic spectrometer at Fermilab. The DA system read out 24000 channels in 50 mus. Events were accepted at the rate of 9000 per second. Eight large FIFOs were used to buffer event segments, which were then compressed and formatted by 54 processors housed in six VME crates. Data was written continuously to 42 Exabyte tape drives at the rate of 9.6 Mb/s. During the 1991 fixed target run at Fermilab, 20 billion physics events were recorded on 24000 8 mm tapes; this 50 Th (Terabyte) data set is now being analyzed. C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV MISSISSIPPI,DEPT PHYS & ASTRON,OXFORD,MS 38677. RP AMATO, S (reprint author), CTR BRASILEIRO PESQUISAS FIS,BR-20000 RIO JANEIRO,BRAZIL. RI de Mello Neto, Joao/C-5822-2013 OI de Mello Neto, Joao/0000-0002-3234-6634 NR 13 TC 46 Z9 46 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 JAN 15 PY 1993 VL 324 IS 3 BP 535 EP 542 DI 10.1016/0168-9002(93)91057-T PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KG703 UT WOS:A1993KG70300014 ER PT J AU SHENHAV, NJ AF SHENHAV, NJ TI THE BRIDGE METHOD FOR MEASURING THE WIRE TENSION OF MULTIWIRE CHAMBERS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB A high-sensitivity practical circuit for measuring wire tension is described. Test measurement results are shown for 43 cm long wires of 25 mum and 75 mum diameter. There is an excellent correlation between the measured and the applied tensions. The deviations are within the range of a few percent up to a tension of 250 g. A detailed mathematical formulation of the basis of the method is presented. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP SHENHAV, NJ (reprint author), UNIV MASSACHUSETTS DARTMOUTH,DEPT PHYS,N DARTMOUTH,MA 02747, USA. NR 8 TC 8 Z9 8 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 JAN 15 PY 1993 VL 324 IS 3 BP 551 EP 557 DI 10.1016/0168-9002(93)91059-V PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KG703 UT WOS:A1993KG70300016 ER PT J AU ROMERO, LA DICKEY, FM AF ROMERO, LA DICKEY, FM TI THE POSITIVE FUNCTION MAXIMIZING THE NORMALIZED OUTPUT FROM A CORRELATION FILTER SO OPTICS COMMUNICATIONS LA English DT Article ID PATTERN-RECOGNITION AB The problem of finding the function that maximizes the normalized output from a correlation filter is a classical problem in signal analysis. In this paper we solve this problem when the input is constrained to be real and positive. RP ROMERO, LA (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0030-4018 J9 OPT COMMUN JI Opt. Commun. PD JAN 15 PY 1993 VL 95 IS 4-6 BP 226 EP 230 DI 10.1016/0030-4018(93)90667-T PG 5 WC Optics SC Optics GA KG335 UT WOS:A1993KG33500009 ER PT J AU ABDELDAYEM, HA SHENG, W VENKATESWARLU, P WITHEROW, WK FRAZIER, DO SEKHAR, PC GEORGE, MC KISPERT, L WASIELEWSKI, MR AF ABDELDAYEM, HA SHENG, W VENKATESWARLU, P WITHEROW, WK FRAZIER, DO SEKHAR, PC GEORGE, MC KISPERT, L WASIELEWSKI, MR TI NONLINEAR OPTICAL-PARAMETERS OF 7',7'-DICYANO-7'-APO-BETA-CAROTENE IN HEXANE BY SELF-ACTION TECHNIQUES SO OPTICS COMMUNICATIONS LA English DT Article ID NEMATIC LIQUID-CRYSTALS; SINGLET-STATE LIFETIME; TEMPERATURE-DEPENDENCE; PHASE-CONJUGATION; DIFFRACTION; GRATINGS AB Quantitative measurements of the nonlinear refractive index coefficient (n2) and the third-order nonlinear susceptibility (chi(3)) for a solution of 7',7'-dicyano-7'-apo-beta-carotene (DCAC) in hexane have been measured at different concentrations. The measurements have been performed by both the self-trapping and self-phase modulation techniques using a cw Ar+ laser. The results show that DCAC has a relatively large nonlinearity, attributed to a thermal mechanism, with n2 of the order of 10(9) times that of CS2. C1 ALABAMA A&M UNIV,DEPT PHYS,NORMAL,AL 35762. UNIV W FLORIDA,DEPT PHYS,PENSACOLA,FL 32514. UNIV ALABAMA,DEPT CHEM,TUSCALOOSA,AL 35487. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 17 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0030-4018 J9 OPT COMMUN JI Opt. Commun. PD JAN 15 PY 1993 VL 95 IS 4-6 BP 295 EP 300 DI 10.1016/0030-4018(93)90681-T PG 6 WC Optics SC Optics GA KG335 UT WOS:A1993KG33500023 ER PT J AU BACKUS, S KAPTEYN, HC MURNANE, MM GOLD, DM NATHEL, H WHITE, W AF BACKUS, S KAPTEYN, HC MURNANE, MM GOLD, DM NATHEL, H WHITE, W TI PREPULSE SUPPRESSION FOR HIGH-ENERGY ULTRASHORT PULSES USING SELF-INDUCED PLASMA SHUTTERING FROM A FLUID TARGET SO OPTICS LETTERS LA English DT Article ID LASER AB The technique of self-induced plasma shuttering can be used to suppress prepulse energy from an ultrashort pulse. If a femtosecond pulse is incident upon a transparent target, the leading edge passes through while the peak reflects owing to ionization breakdown at the surface. We describe a fluid jet, enclosed in a vacuum chamber, that allows this technique to be used at high repetition rates. The jet has excellent stability and a fast (approximately 500 mus) recovery time. At normal incidence, we demonstrate a reflection efficiency of 70% with a prepulse-to-main-pulse energy suppression ratio of > 10, while at Brewster incidence we measure a reflection efficiency of 38% with a suppression ratio of nearly 400. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP BACKUS, S (reprint author), WASHINGTON STATE UNIV,DEPT PHYS,PULLMAN,WA 99164, USA. RI Backus, Sterling/C-2506-2008; Kapteyn, Henry/H-6559-2011 OI Kapteyn, Henry/0000-0001-8386-6317 NR 14 TC 32 Z9 32 U1 1 U2 6 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD JAN 15 PY 1993 VL 18 IS 2 BP 134 EP 136 DI 10.1364/OL.18.000134 PG 3 WC Optics SC Optics GA KG085 UT WOS:A1993KG08500017 PM 19802062 ER PT J AU PAUL, PH CLEMENS, NT AF PAUL, PH CLEMENS, NT TI SUBRESOLUTION MEASUREMENTS OF UNMIXED FLUID USING ELECTRONIC QUENCHING OF NO-A2-SIGMA SO OPTICS LETTERS LA English DT Article AB Planar laser-induced fluorescence of NO has been used to acquire instantaneous two-dimensional images of the extent of fluid unmixedness in a turbulent flow. Measurements accurate to the molecular diffusion scale are made by taking advantage of the large range of cross sections for electronic collisional quenching of NO A2SIGMA+. The recorded signal is known to be related to that fraction of the sample volume which contains pure (unmixed) fluid. Image measurements of an axisymmetric shear layer are presented and are reduced to mixed fluid probability distributions. RP PAUL, PH (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551, USA. NR 3 TC 11 Z9 11 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD JAN 15 PY 1993 VL 18 IS 2 BP 161 EP 163 DI 10.1364/OL.18.000161 PG 3 WC Optics SC Optics GA KG085 UT WOS:A1993KG08500026 PM 19802071 ER PT J AU ARTACHO, E FALICOV, LM AF ARTACHO, E FALICOV, LM TI OPEN FERMIONIC QUANTUM-SYSTEMS SO PHYSICAL REVIEW B LA English DT Article ID CHEMISORPTION; MODEL AB A method to treat a quantum system in interaction with a fermionic reservoir is presented. Its most important feature is that the dynamics of the exchange of particles between the system and the reservoir is explicitly included via an effective interaction term in the Hamiltonian. This feature gives rise to fluctuations in the total number of particles in the system. The system is to be considered in its full structure, whereas the reservoir is described only in an effective way, as a source of particles characterized by a small set of parameters. Possible applications include surfaces, molecular clusters, and defects in solids, in particular in highly correlated electronic materials. Four examples are presented: a tight-binding model for an adsorbate on the surface of a one-dimensional lattice, the Anderson model of a magnetic impurity in a metal, a two-orbital impurity with interorbital hybridization (intermediate-valence center), and a two-orbital impurity with intetorbital repulsive interactions. C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP ARTACHO, E (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. RI Artacho, Emilio/G-2616-2015 OI Artacho, Emilio/0000-0001-9357-1547 NR 18 TC 7 Z9 7 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 JAN 15 PY 1993 VL 47 IS 3 BP 1190 EP 1198 DI 10.1103/PhysRevB.47.1190 PG 9 WC Physics, Condensed Matter SC Physics GA KJ518 UT WOS:A1993KJ51800005 ER PT J AU SANCHEZCASTRO, C BEDELL, KS AF SANCHEZCASTRO, C BEDELL, KS TI HEAVY-FERMION BEHAVIOR IN A 2-BAND FERMI-LIQUID SO PHYSICAL REVIEW B LA English DT Article ID FLUCTUATING ELECTRON-SYSTEMS; INDUCED-INTERACTION-MODEL; CONSERVING APPROXIMATIONS; WAVE SUPERCONDUCTIVITY; SPIN FLUCTUATIONS; ANDERSON LATTICE; KONDO LATTICE; UPT3; TEMPERATURE; DEPENDENCE AB In this paper we present the calculation of the Landau parameters for a two-band Fermi liquid using the induced-interaction model. The model studied consists of two bands crossing the Fermi surface; one of these bands has electrons with a large crystalline mass and strong Coulomb correlations. The other band is made up of electrons with a small crystalline mass and negligible intraband correlations. For an antiferromagnetic coupling between the two bands, the system exhibits heavy-fermion behavior, i.e., very large linear in T-specific-heat coefficient, large T2 term in the resistivity, and a small Wilson ratio. A ferromagnetic coupling between the two bands does not result in heavy-fermion behavior. RP SANCHEZCASTRO, C (reprint author), LOS ALAMOS NATL LAB,T-11,MS B262,LOS ALAMOS,NM 87545, USA. NR 46 TC 1 Z9 1 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JAN 15 PY 1993 VL 47 IS 3 BP 1203 EP 1216 DI 10.1103/PhysRevB.47.1203 PG 14 WC Physics, Condensed Matter SC Physics GA KJ518 UT WOS:A1993KJ51800007 ER PT J AU ZHANG, BL WANG, CZ HO, KM AF ZHANG, BL WANG, CZ HO, KM TI VIBRATIONAL-SPECTRA OF C-84 ISOMERS SO PHYSICAL REVIEW B LA English DT Note ID CARBON; FREQUENCIES; FULLERENES; C76; C84 AB The vibrational frequencies of three C84 fullerene isomers are calculated with a tight-binding potential model. The differences between the vibrational properties of these isomers are discussed. RP ZHANG, BL (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES LAB,AMES,IA 50011, USA. NR 19 TC 22 Z9 22 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 JAN 15 PY 1993 VL 47 IS 3 BP 1643 EP 1646 DI 10.1103/PhysRevB.47.1643 PG 4 WC Physics, Condensed Matter SC Physics GA KJ518 UT WOS:A1993KJ51800068 ER PT J AU NELSON, JS PLIMPTON, SJ SEARS, MP AF NELSON, JS PLIMPTON, SJ SEARS, MP TI PLANE-WAVE ELECTRONIC-STRUCTURE CALCULATIONS ON A PARALLEL SUPERCOMPUTER SO PHYSICAL REVIEW B LA English DT Article ID NORM-CONSERVING PSEUDOPOTENTIALS; MOLECULAR-DYNAMICS; SPACE FORMALISM; TOTAL ENERGY; ABINITIO; SOLIDS; SURFACES; SYSTEMS; METALS; SI AB We present a detailed description of the implementation on a parallel supercomputer (hypercube) of the first-order equation-of-motion solution to Schrodinger's equation, using plane-wave basis functions and ab initio separable pseudopotentials. By distributing the plane waves across the processors of the hypercube many of the computations can be performed in parallel, resulting in decreases in the overall computation time relative to conventional vector supercomputers. This partitioning also provides ample memory for large fast-Fourier-transform (FFT) meshes and the storage of plane-wave coefficients for many hundreds of energy bands. The usefulness of the parallel techniques is demonstrated by benchmark timings for both the FFT's and iterations of the self-consistent solution of Schrodinger's equation for different sized Si unit cells of up to 512 atoms. C1 SANDIA NATL LABS, DIV PARALLEL COMPUTAT SCI, ALBUQUERQUE, NM 87185 USA. RP SANDIA NATL LABS, DIV SEMICOND PHYS, 1112, ALBUQUERQUE, NM 87185 USA. NR 38 TC 20 Z9 20 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD JAN 15 PY 1993 VL 47 IS 4 BP 1765 EP 1774 DI 10.1103/PhysRevB.47.1765 PG 10 WC Physics, Condensed Matter SC Physics GA KK584 UT WOS:A1993KK58400007 ER PT J AU ROJO, AG MAHAN, GD AF ROJO, AG MAHAN, GD TI NONLINEAR POLARIZABILITY OF CORRELATED ONE-DIMENSIONAL SYSTEMS SO PHYSICAL REVIEW B LA English DT Article ID CONJUGATED ORGANIC-MOLECULES; OPTICAL-PROPERTIES; POLYMERS; CHAINS AB Polymers have been found to be materials with very nonlinear optical properties. Previous theories of polymer polarizability have used noninteracting electronic models. We study the effect of electronic correlations on the polarizability and hyperpolarizability of one-dimensional systems. We consider the Hubbard model for interacting systems and solve exactly finite chains in the presence of an electric field. For the case of one electron per site, the linear polarizability decreases with interaction, as expected from the decrease of charge fluctuations. The hyperpolarizability, however, shows a more interesting behavior: it first increases as a function of interaction and then decreases after reaching a maximum. We examine this effect in a spin-dependent Hartree-Fock treatment of the electronic correlations. C1 UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. NR 12 TC 10 Z9 10 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 JAN 15 PY 1993 VL 47 IS 4 BP 1794 EP 1799 DI 10.1103/PhysRevB.47.1794 PG 6 WC Physics, Condensed Matter SC Physics GA KK584 UT WOS:A1993KK58400011 ER PT J AU OSORIO, R FROYEN, S AF OSORIO, R FROYEN, S TI INTERACTION PARAMETERS AND A QUENCHED-DISORDER PHASE-DIAGRAM FOR (GAAS)1-XGE2X ALLOYS SO PHYSICAL REVIEW B LA English DT Article ID ISING-MODEL; BAND OFFSETS; TRANSITION; GROWTH; SEMICONDUCTORS; (GASB)1-XGE2X; SUBSTITUTION; MIXTURES; LATTICE AB We obtain the interaction parameters for the spin-1 Ising representation of (GaAs)1-xGe2x metastable alloys, based on the total energies of a set of ordered structures calculated by the first-principles self-consistent pseudopotential method. We then use these parameters to reexamine the thermodynamic consequences of a recently proposed quenched-disorder model for the observed zinc-blende-to-diamond phase transition in (GaAs)1-xGe2x. In this model, Ge atoms axe distributed at random at all lattice sites. We present a complete phase diagram of the quenched-disorder model in the pair approximation of the cluster-variation method. In view of our set of first-principles interaction parameters, we conclude that, like previously proposed bulk thermodynamic models, the quenched-disorder model does not lead to a phase transition that agrees with the experimental result. C1 UNIV BRASILIA,DEPT FIS,BR-70910 BRASILIA,DF,BRAZIL. RP OSORIO, R (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. NR 34 TC 12 Z9 12 U1 1 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 JAN 15 PY 1993 VL 47 IS 4 BP 1889 EP 1897 DI 10.1103/PhysRevB.47.1889 PG 9 WC Physics, Condensed Matter SC Physics GA KK584 UT WOS:A1993KK58400022 ER PT J AU DUNPHY, JC SAUTET, P OGLETREE, DF DABBOUSI, O SALMERON, MB AF DUNPHY, JC SAUTET, P OGLETREE, DF DABBOUSI, O SALMERON, MB TI SCANNING-TUNNELING-MICROSCOPY STUDY OF THE SURFACE-DIFFUSION OF SULFUR ON RE(0001) SO PHYSICAL REVIEW B LA English DT Article ID ADSORPTION; PLATINUM; GROWTH; ATOMS; SI AB Low coverages of sulfur chemisorbed on the rhenium (0001) surface were studied by scanning tunneling microscopy (STM). At one-quarter monolayer coverage, sulfur forms a p (2 X 2) ordered overlayer, consistent with low-energy electron-diffraction results. At lower coverages, some of the sulfur forms small islands of the p (2 X 2) structure. Between the islands, sulfur atoms diffuse over the surface as a lattice gas. In our conditions, the residence time of the sulfur atoms in each site is comparable to the STM scan rate, which gives rise to an apparently noisy image. However, a spatial corelation function was used to determine that this apparent noise is due to diffusing sulfur that maintains a local p (2 X 2) order. This order is due to a weak attractive interaction between the diffusing atoms at twice the Re lattice spacing and a repulsive interaction at closer distances. The strength of the attractive interaction was measured by fitting the results of the correlation function to an Ising model of the interaction of sulfur atoms on the surface. The energy barrier to diffusion was calculated from the sulfur residence time, and compares well with an extended Huckel calculation. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. ENS,CHIM THEOR LAB,F-69464 LYON 7,FRANCE. INST RECH CATALYSE,F-69626 VILLEURBANNE,FRANCE. UNIV PETR & MINERALS DHAHRAN,DHAHRAN,SAUDI ARABIA. RP DUNPHY, JC (reprint author), LAWRENCE BERKELEY LAB,CTR ADV MAT,DIV MAT SCI,BERKELEY,CA 94720, USA. RI Sautet, Philippe/G-3710-2014; Ogletree, D Frank/D-9833-2016 OI Sautet, Philippe/0000-0002-8444-3348; Ogletree, D Frank/0000-0002-8159-0182 NR 33 TC 44 Z9 44 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 JAN 15 PY 1993 VL 47 IS 4 BP 2320 EP 2328 DI 10.1103/PhysRevB.47.2320 PG 9 WC Physics, Condensed Matter SC Physics GA KK584 UT WOS:A1993KK58400068 ER PT J AU OLIVEIRA, LE MAHAN, GD AF OLIVEIRA, LE MAHAN, GD TI DONOR-PHOTOLUMINESCENCE LINE-SHAPES FROM GAAS-(GA,AL)AS QUANTUM-WELLS SO PHYSICAL REVIEW B LA English DT Note ID HYDROGENIC DONORS; SHALLOW IMPURITIES; ENERGY-SPECTRA; GAAS; ACCEPTORS; STATES AB The D-degrees-h impurity-related photoluminescence spectra of confined donors in GaAs-(Ga,Al)As quantum wells is theoretically investigated within the effective-mass approximation. The impurity wave functions and binding energies are evaluated via a variational procedure. Calculations are performed for different well widths, temperatures, and impurity doping profiles. Typical D-degrees-h theoretical photoluminescence line shapes show peaked structures corresponding to on-center and on-edge donors in good agreement with experimental results. C1 UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP OLIVEIRA, LE (reprint author), UNIV ESTADUAL CAMPINAS,INST FIS,CAIXA POSTAL 6165,BR-13081 SAO PAULO,BRAZIL. NR 27 TC 9 Z9 9 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JAN 15 PY 1993 VL 47 IS 4 BP 2406 EP 2409 DI 10.1103/PhysRevB.47.2406 PG 4 WC Physics, Condensed Matter SC Physics GA KK584 UT WOS:A1993KK58400080 ER PT J AU DREES, M NOJIRI, MM AF DREES, M NOJIRI, MM TI NEUTRALINO RELIC DENSITY IN MINIMAL N=1 SUPERGRAVITY SO PHYSICAL REVIEW D LA English DT Article ID SUPERSYMMETRIC STANDARD MODEL; SOFTLY BROKEN SUPERSYMMETRY; LOW-ENERGY SUPERGRAVITY; GRAND UNIFIED THEORIES; LIGHTEST HIGGS BOSON; DARK MATTER; SYMMETRY-BREAKING; RADIATIVE-CORRECTIONS; COSMOLOGICAL CONSTRAINTS; FERMILAB TEVATRON AB We compute the cosmic relic (dark-matter) density of the lightest supersymmetric particle (LSP) in the framework of minimal N = 1 supergravity models with radiative breaking of the electroweak gauge symmetry. To this end, we recalculate the cross sections for all possible annihilation processes for a general, mixed neutralino state with arbitrary mass. Our analysis includes effects of all Yukawa couplings of third-generation fermions, and allows for a fairly general set of soft supersymmetry- (SUSY-) breaking parameters at the Planck scale. We find that a cosmologically interesting relic. density emerges naturally over wide regions of parameter space. However, the requirement that relic neutralinos do not overclose the Universe does not lead to upper bounds on SUSY-breaking parameters that are strictly valid for all combinations of parameters and of interest for existing or planned collider experiments; in particular, gluino and squark masses in excess of 5 TeV cannot strictly be excluded. On the other hand, in the ''generic'' case of a gauginolike neutralino whose annihilation cross sections are not ''accidentally'' enhanced by a nearby Higgs boson or Z pole, all sparticles should lie within the reach of the proposed pp and e+e- supercolliders. We also find that requiring the LSP to provide all dark matter predicted by inflationary models imposes a strict lower bound of 40 GeV on the common scalar mass m at the Planck scale, while the lightest sleptons would have to be heavier than 100 GeV. Fortunately, a large relic neutralino density does not exclude the possibility that charginos, neutralinos, gluinos, and squarks are all within the reach of the CERN e+e- collider LEP 200 and the Fermilab Tevatron. C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,THEORY GRP,STANFORD,CA 94305. RP DREES, M (reprint author), DESY,THEORIE GRP,NOTKESTR 85,W-2000 HAMBURG 52,GERMANY. NR 98 TC 511 Z9 511 U1 2 U2 6 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 JAN 15 PY 1993 VL 47 IS 2 BP 376 EP 408 DI 10.1103/PhysRevD.47.376 PG 33 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KG727 UT WOS:A1993KG72700004 ER PT J AU ADAMS, FC BOND, JR FREESE, K FRIEMAN, JA OLINTO, AV AF ADAMS, FC BOND, JR FREESE, K FRIEMAN, JA OLINTO, AV TI NATURAL INFLATION - PARTICLE PHYSICS MODELS, POWER-LAW SPECTRA FOR LARGE-SCALE STRUCTURE, AND CONSTRAINTS FROM THE COSMIC BACKGROUND EXPLORER SO PHYSICAL REVIEW D LA English DT Article ID PSEUDO-GOLDSTONE BOSONS; BROKEN-SYMMETRIC THEORY; APM GALAXY SURVEY; COLD DARK MATTER; EXTENDED INFLATION; SUPERSTRING MODELS; NONRENORMALIZATION THEOREMS; PHOTOMETRIC CORRECTIONS; SUPERSYMMETRY BREAKING; DENSITY PERTURBATIONS AB We discuss the particle physics basis for models of natural inflation with pseudo Nambu-Goldstone bosons and study the consequences for large-scale structure of the nonscale-invariant density fluctuation spectra that arise in natural inflation and other models. A pseudo Nambu-Goldstone boson, with a potential of the form V(phi) = LAMBDA4[1 +/- cos(phi/f)], can naturally give rise to an epoch of inflation in the early Universe, if f approximately M(Pl) and LAMBDA approximately M(GUT). Such mass scales arise in particle physics models with a gauge group that becomes strongly interacting at the grand unified theory scale. We work out a specific particle physics example based on the multiple gaugino condensation scenario in superstring theory. We then study the cosmological evolution of and constraints upon these inflation models numerically and analytically. To obtain sufficient inflation with a probability of order 1 and a high enough post-inflation reheat temperature for baryogenesis, we require f greater than or similar to 0.3 M(P1). The primordial density fluctuation spectrum generated by quantum fluctuations in phi is a non-scale-invariant power law P(k) is-proportional-to k(ns), with n(s) congruent-to 1 - (M(P1)2/8pif2) leading to more power on large length scales than the n(s) = 1 Harrison-Zeldovich spectrum. (For the reader primarily interested in large-scale structure, the discussion of this topic is presented in Sec. IV and is intended to be nearly self-contained.) We pay special attention to the prospects of using the enhanced power to explain the otherwise puzzling large-scale clustering of galaxies and clusters and their flows. We find that the standard cold dark matter (CDM) model with 0 less than or similar to n(s) less than or similar to 0.6 could in principle explain these data. However, the microwave background anisotropies recently detected by the Cosmic Background Explorer (COBE) imply such low primordial amplitudes for these CDM models (that is, bias factors b8 greater than or similar to 2 for n(s) less than or similar to 0.6) that galaxy formation would occur too late to be viable and the large-scale galaxy velocities would be too small. In fact, combining the COBE results with the requirement of sufficiently early galaxy formation (z(GF) > 2) leads to the constraint n(s) greater than or equal to 0.63, which corresponds to f greater than or similar to 0.3 M(P1) for natural inflation (virtually the same as the sufficient reheating constraint). A comparable bound n(s) greater than or equal to 0.72 arises by combining COBE with the inferred large-scale flows. For other inflation models, such as extended inflation and inflation with exponential potentials, which give rise to initial fluctuation spectra that are power laws through the 3 decades in wavelength probed by large-scale observations, gravity waves can produce a significant fraction of the COBE signal (while they are negligible for natural inflation); for these models, our corresponding COBE constraints on n, are therefore tighter, n, > 0. 76 (from z(GF) > 2) and n(s) > 0.89 (from large-scale flows). Combined with other constraints on the Brans-Dicke parameter (which effectively imply n(s) < 0.77-0.84), this leaves little or no room for most extended inflation models. Chaotic inflation models with power-law potentials have n(s) greater than or equal to 0.95 over observable wavelengths and so are not affected. Although no single value of the spectral index n(s) in the standard cold dark matter model universally fits the data, a value n(s) less-than-or-equal-to 1 may be combined with other variations of the standard CDM framework to explain the large-scale structure. For example, if the baryon density is as high as OMEGA(B) = 0.1 or the Hubble parameter as low as H0 = 40 km/(sec/Mpc), then n(s) approximately 0.7 with CDM would be at least marginally consistent with the large-scale structure data [e.g., the automatic plate measuring (APM) survey angular correlation function], COBE, large-scale velocities, and the requirement of sufficiently early structure formation. C1 UNIV CALIF SANTA BARBARA,INST THEORET PHYS,SANTA BARBARA,CA 93106. UNIV TORONTO,CANADIAN INST THEORET ASTROPHYS,COSMOL PROGRAM,TORONTO M5S 1A1,ONTARIO,CANADA. FERMI NATL ACCELERATOR LAB,NASA,FERMILAB ASTROPHYS CTR,BATAVIA,IL 60510. UNIV CHICAGO,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637. RP ADAMS, FC (reprint author), UNIV MICHIGAN,DEPT PHYS,ANN ARBOR,MI 48109, USA. NR 100 TC 365 Z9 365 U1 0 U2 3 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 JAN 15 PY 1993 VL 47 IS 2 BP 426 EP 455 DI 10.1103/PhysRevD.47.426 PG 30 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KG727 UT WOS:A1993KG72700008 ER PT J AU KASTOR, D TRASCHEN, J AF KASTOR, D TRASCHEN, J TI LINEAR INSTABILITY OF NONVACUUM SPACETIMES SO PHYSICAL REVIEW D LA English DT Article ID QUANTUM LINEARIZATION INSTABILITIES; COSMOLOGICAL PERTURBATIONS; GENERAL-RELATIVITY; DESITTER SPACETIME; CONSTRAINTS AB We study the problem of linear instability in nonvacuum spacetimes. For vacuum spacetimes linear instability occurs when the spacetime has Killing vectors. In the nonvacuum case, one must Prescribe how the sources are to vary. For one natural choice, we show that the signal for instability is the existence of integral constraint vector fields. These vector fields lead, as in the vacuum case, to nonlinear constraints on the first-order perturbations to the metric and momentum. For other choices for variations of the sources, we show how to modify the definition of integral constraint vectors appropriately. Since Robertson-Walker spacetimes have integral constraint vectors our results may have cosmological applications. C1 UNIV MASSACHUSETTS,DEPT PHYS & ASTRON,AMHERST,MA 01003. RP KASTOR, D (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305, USA. NR 18 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 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 15 PY 1993 VL 47 IS 2 BP 480 EP 487 DI 10.1103/PhysRevD.47.480 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KG727 UT WOS:A1993KG72700013 ER PT J AU PAZ, JP HABIB, S ZUREK, WH AF PAZ, JP HABIB, S ZUREK, WH TI REDUCTION OF THE WAVE PACKET - PREFERRED OBSERVABLE AND DECOHERENCE TIME SCALE SO PHYSICAL REVIEW D LA English DT Article ID QUANTUM BROWNIAN-MOTION; INTEGRAL APPROACH; ENVIRONMENT AB Environment-induced destruction of quantum coherence is investigated in a simple model where the system is a harmonic oscillator, the environment is a collection of harmonic oscillators, and the interaction between them is linear in the position coordinate of the system. We study decoherence for initial states consisting of coherent superpositions of two Gaussian wave packets in either position or momentum. A new measure of the effectiveness of decoherence appropriate to the model and choice of initial conditions is proposed. By studying the dependence of the decoherence rate on the location of the initial peaks of the Wiper function, we clarify the sense in which position is a preferred observable even though position eigenstates are not the pointer states of this model. We analyze decoherence in the low-temperature regime and show that the usual ''high-temperature'' approximation is remarkably accurate in its domain of applicability. We also examine the relationship between the decoherence process and the frequency distribution of the environment oscillators (in particular, we focus attention on a specific ''supra-Ohmic'' environment). Implications of our results for the quantum to classical transition in various contexts are briefly explored. RP PAZ, JP (reprint author), LOS ALAMOS NATL LAB,T-6,MAIL STOP B288,LOS ALAMOS,NM 87545, USA. RI Paz, Juan/C-5947-2008 NR 34 TC 207 Z9 207 U1 0 U2 3 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 JAN 15 PY 1993 VL 47 IS 2 BP 488 EP 501 DI 10.1103/PhysRevD.47.488 PG 14 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KG727 UT WOS:A1993KG72700014 ER PT J AU LIN, Y JONAH, CD AF LIN, Y JONAH, CD TI PICOSECOND DYNAMICS OF BENZOPHENONE ANION SOLVATION SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID PULSE-RADIOLYSIS; POLAR LIQUIDS; NONEQUILIBRIUM SOLVATION; ELECTRON-TRANSFER; TIME; FEMTOSECOND; WATER; SPECTROSCOPY; ALCOHOLS; SOLVENTS AB The dynamics of benzophenone anion solvation in alcohols are studied by pulse-radiolysis techniques. The solvation process is characterized by the blue shift of the transient absorption spectrum of the anion and is faster for the smaller alcohols. The anion is solvated more slowly than the electron in the same solvent, but the solvation times of both are similar to tau2, the solvent dielectric relaxation time. The familiar phenomenological ''two-state'' model of solvation was found to be inappropriate for describing the anion solvation process. A multistate process appears to be a more appropriate description. We modeled the kinetics of the spectral relaxation. In most cases, nearly quantitative agreement between the calculated and observed spectra is achieved. The characteristic relaxation times for the alcohol solvents around the anions were also reproduced. C1 ARGONNE NATL LAB,DEPT CHEM,ARGONNE,IL 60439. NR 54 TC 29 Z9 29 U1 2 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 JAN 14 PY 1993 VL 97 IS 2 BP 295 EP 302 DI 10.1021/j100104a007 PG 8 WC Chemistry, Physical SC Chemistry GA KH404 UT WOS:A1993KH40400007 ER PT J AU ITOH, K NISHIKAWA, M HOLROYD, R AF ITOH, K NISHIKAWA, M HOLROYD, R TI ELECTRON-ATTACHMENT TO TOLUENE IN N-HEXANE AND 2,2-DIMETHYLBUTANE AT HIGH-PRESSURE SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID NONPOLAR-SOLVENTS; EXCESS ELECTRONS; MOBILITY; BENZENE; LIQUID; MIXTURES AB The effect of dilute concentrations of toluene on the electron mobility in two isomeric hexanes was studied as a function of pressure from 1 bar to 3 kbar and at selected temperatures between 9 and 60-degrees-C. The effect of toluene on the mobility is small at 1 bar but quite large at the higher pressures. The results are interpreted in terms of reversible electron attachment to a toluene species which is the monomer in n-hexane. For this reaction DELTAH(r) is -12.0 kcal/mol in n-hexane at 2.5 kbar. In 2,2-dimethylbutane attachment to a dimeric species is indicated. The volume changes for these attachment reactions are large, between -80 and -100 cm3/mol. In hexane the volume changes are attributed in part to the electrostriction of the solvent by the toluene anion and in part to a positive molar volume of the electron. C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. UNIV TOKYO,DEPT PURE & APPL SCI,MEGURO KU,TOKYO 153,JAPAN. NR 19 TC 14 Z9 14 U1 0 U2 2 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 JAN 14 PY 1993 VL 97 IS 2 BP 503 EP 507 DI 10.1021/j100104a038 PG 5 WC Chemistry, Physical SC Chemistry GA KH404 UT WOS:A1993KH40400038 ER PT J AU DOLAN, TJ AF DOLAN, TJ TI ELECTRON AND ION COLLISIONS WITH WATER-VAPOR SO JOURNAL OF PHYSICS D-APPLIED PHYSICS LA English DT Article ID CROSS-SECTIONS; IONIZATION; IMPACT; H2O AB Reaction rate parameters are needed to model the effects of water molecules interacting with a hydrogen plasma. Cross sections for ionization and dissociation of water by electron impact and for ionization by proton impact are selected and averaged over Maxwellian distributions of electrons and ions. The results are fitted by algorithms useful for plasma simulation programs. RP DOLAN, TJ (reprint author), IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 24 TC 42 Z9 42 U1 1 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0022-3727 J9 J PHYS D APPL PHYS JI J. Phys. D-Appl. Phys. PD JAN 14 PY 1993 VL 26 IS 1 BP 4 EP 8 DI 10.1088/0022-3727/26/1/002 PG 5 WC Physics, Applied SC Physics GA KH167 UT WOS:A1993KH16700002 ER PT J AU FROGGATT, CD MOORHOUSE, RG KNOWLES, IG AF FROGGATT, CD MOORHOUSE, RG KNOWLES, IG TI SUPERSYMMETRIC RENORMALIZATION-GROUP FIXED-POINTS AND 3RD GENERATION FERMION MASS PREDICTIONS SO PHYSICS LETTERS B LA English DT Article ID ELECTRIC-DIPOLE MOMENT; GRAND UNIFIED THEORIES; TOP-QUARK; SYMMETRY-BREAKING; STANDARD MODEL; HIGGS; ELECTROWEAK; UNIFICATION; WEAK; NEUTRON AB We present a supersymmetric renormalisation group fixed point determination of the third generation fermion masses, in which the large mass ratio between the top and bottom quarks is attributed to a hierarchy in the vacuum expectation values of the two Higgs doublets. Above a supersymmetry breaking scale, M(S), we use the minimal supersymmetric standard model with a transition at M(S) to the standard model with only one Higgs doublet effective. The mass predictions result from renormalisation group evolution of large Yukawa couplings at M(x) approximately 10(16) GeV. Averaging over a wide range of these couplings, not subject to any symmetry requirements, gives m(t) = 184.3 +/- 6.8 GeV, m(b) = 4.07 +/- 0.33 GeV, m(tau) = 1.78 +/- 0.33 GeV and a light Higgs mass m(h)o = 121.8 +/- 4.3 GeV for M(S) = 1 TeV and alpha(s) (M(Z)) = 0.125. 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 63 TC 25 Z9 25 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 JAN 14 PY 1993 VL 298 IS 3-4 BP 356 EP 362 DI 10.1016/0370-2693(93)91833-9 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KJ489 UT WOS:A1993KJ48900018 ER PT J AU BUSKULIC, D DECAMP, D GOY, C LEES, JP MINARD, MN MOURS, B ALEMANY, R ARIZTIZABAL, F COMAS, P CRESPO, JM DELFINO, M FERNANDEZ, E GAITAN, V GARRIDO, L MATTISON, T PACHECO, A PASCUAL, A 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 HU, H HUANG, D HUANG, X LIN, J LOU, J QIAO, C WANG, T XIE, Y XU, D XU, R ZHANG, J ZHAO, W BAUERDICK, LAT BLUCHER, E BONVICINI, G BOSSI, F BOUDREAU, J CASPER, D DREVERMANN, H FORTY, RW GANIS, G GAY, C HAGELBERG, R HARVEY, J HAYWOOD, S HILGART, J JACOBSEN, R JOST, B KNOBLOCH, J LANCON, E LEHRAUS, I LOHSE, T LUSIANI, A MARTINEZ, M MATO, P MEINHARD, H MINTEN, A MIQUEL, R MOSER, HG PALAZZI, P PERLAS, JA PUSZTASZERI, JF RANJARD, F REDLINGER, G ROLANDI, L ROTHBERG, J RUAN, T SAICH, M SCHLATTER, D SCHMELLING, M SEFKOW, F TEJESSY, W WACHSMUTH, H WIEDENMANN, W WILDISH, T WITZELING, W WOTSCHACH, 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 FEARNLEY, T HANSEN, JD HANSEN, JR HANSEN, PH MOLLERUD, R NILSSON, BS EFTHYMIOPOULOS, I KYRIAKIS, A SIMOPOULOU, E VAYAKI, A ZACHARIADOU, K BADIER, J BLONDEL, A BONNEAUD, G BRIENT, JC FOUQUE, G ORTEU, S ROSOWSKY, A ROUGE, A RUMPF, M TANAKA, R VERDERI, M VIDEAU, H CANDLIN, DJ PARSONS, MI VEITCH, E MONETA, L PARRINI, G CORDEN, M GEORGIOPOULOS, C IKEDA, 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 ALTOON, B BOYLE, O COLRAIN, P TENHAVE, I LYNCH, JG MAITLAND, W MORTON, WT RAINE, C SCARR, JM SMITH, K THOMPSON, AS TURNBULL, RM BRANDL, B BRAUN, O 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 NASH, JH PATTON, SJ PAYNE, DG PHILLIPS, MJ SEDGBEER, JK TOMALIN, IR WRIGHT, AG KNERINGER, E 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 KLEINKNECHT, K RAAB, J RENK, B SANDER, HG SCHMIDT, H STEEG, F WALTHER, SM WOLF, B AUBERT, JJ BENCHOUK, C BONISSENT, A CARR, J COYLE, P DRINKARD, J ETIENNE, F PAPALEXIOU, S PAYRE, P QIAN, Z ROOS, L ROUSSEAU, D SCHWEMLING, P TALBY, M ADLUNG, S BAUER, C BLUM, W BROWN, D CATTANEO, P COWAN, G DEHNING, B DIETL, H DYDAK, F FERNANDEZBOSMAN, M FRANK, M HALLEY, AW LAUBER, J LUTJENS, G LUTZ, G MANNER, W RICHTER, R ROTSCHEIDT, H SCHRODER, J SCHWARZ, AS SETTLES, R SEYWERD, H STIERLIN, U STIEGLER, U STDENIS, R TAKASHIMA, M THOMAS, J WOLF, G BOUCROT, J CALLOT, O CORDIER, A DAVIER, M GRIVAZ, JF HEUSSE, P JAFFE, DE JANOT, P KIM, DW LEDIBERDER, F LEFRANCOIS, J LUTZ, AM SCHUNE, MH VEILLET, JJ VIDEAU, I ZHANG, Z ABBANEO, D AMENDOLIA, SR BAGLIESI, G BATIGNANI, G BOSISIO, L BOTTIGLI, U BOZZI, C BRADASCHIA, C CARPINELLI, M CIOCCI, MA DELLORSO, R FERRANTE, I FIDECARO, F FOA, L FOCARDI, E FORTI, F GIASSI, A GIORGI, MA LIGABUE, F MANNELLI, EB MARROCCHESI, PS MESSINEO, A PALLA, F RIZZO, G SANGUINETTI, G SPAGNOLO, P STEINBERGER, J TENCHINI, R TONELLI, G TRIGGIANI, G VANNINI, C VENTURI, A VERDINI, PG WALSH, J CARTER, JM GREEN, MG MARCH, PV MIR, LM MEDCALF, T QUAZI, IS STRONG, JA WEST, LR BOTTERILL, DR CLIFFT, RW EDGECOCK, TR EDWARDS, M FISHER, SM JONES, TJ NORTON, PR SALMON, DP THOMPSON, JC BLOCHDEVAUX, B COLAS, P DUARTE, H KOZANECKI, W LEMAIRE, MC LOCCI, E LOUCATOS, S MONNIER, E PEREZ, P PERRIER, F RANDER, J RENARDY, JF ROUSSARIE, A SCHULLER, JP SCHWINDLING, J MOHAND, DS VALLAGE, B JOHNSON, RP LITKE, AM TAYLOR, G WEAR, J ASHMAN, JG BABBAGE, W BOOTH, CN BUTTAR, C CARNEY, RE CARTWRIGHT, S COMBLEY, F HATFIELD, F REEVES, P THOMPSON, LF BARBERIO, E BOHRER, A BRANDT, S GRUPEN, C RIVERA, F SCHAFER, U GIANNINI, G GOBBO, B RAGUSA, F BELLANTONI, L CHEN, W 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 WALSH, AM WEBER, FV WHITNEY, MH WU, SL WU, X ZOBERNIG, G AF BUSKULIC, D DECAMP, D GOY, C LEES, JP MINARD, MN MOURS, B ALEMANY, R ARIZTIZABAL, F COMAS, P CRESPO, JM DELFINO, M FERNANDEZ, E GAITAN, V GARRIDO, L MATTISON, T PACHECO, A PASCUAL, A 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 HU, H HUANG, D HUANG, X LIN, J LOU, J QIAO, C WANG, T XIE, Y XU, D XU, R ZHANG, J ZHAO, W BAUERDICK, LAT BLUCHER, E BONVICINI, G BOSSI, F BOUDREAU, J CASPER, D DREVERMANN, H FORTY, RW GANIS, G GAY, C HAGELBERG, R HARVEY, J HAYWOOD, S HILGART, J JACOBSEN, R JOST, B KNOBLOCH, J LANCON, E LEHRAUS, I LOHSE, T LUSIANI, A MARTINEZ, M MATO, P MEINHARD, H MINTEN, A MIQUEL, R MOSER, HG PALAZZI, P PERLAS, JA PUSZTASZERI, JF RANJARD, F REDLINGER, G ROLANDI, L ROTHBERG, J RUAN, T SAICH, M SCHLATTER, D SCHMELLING, M SEFKOW, F TEJESSY, W WACHSMUTH, H WIEDENMANN, W WILDISH, T WITZELING, W WOTSCHACH, 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 FEARNLEY, T HANSEN, JD HANSEN, JR HANSEN, PH MOLLERUD, R NILSSON, BS EFTHYMIOPOULOS, I KYRIAKIS, A SIMOPOULOU, E VAYAKI, A ZACHARIADOU, K BADIER, J BLONDEL, A BONNEAUD, G BRIENT, JC FOUQUE, G ORTEU, S ROSOWSKY, A ROUGE, A RUMPF, M TANAKA, R VERDERI, M VIDEAU, H CANDLIN, DJ PARSONS, MI VEITCH, E MONETA, L PARRINI, G CORDEN, M GEORGIOPOULOS, C IKEDA, 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 ALTOON, B BOYLE, O COLRAIN, P TENHAVE, I LYNCH, JG MAITLAND, W MORTON, WT RAINE, C SCARR, JM SMITH, K THOMPSON, AS TURNBULL, RM BRANDL, B BRAUN, O 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 NASH, JH PATTON, SJ PAYNE, DG PHILLIPS, MJ SEDGBEER, JK TOMALIN, IR WRIGHT, AG KNERINGER, E 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 KLEINKNECHT, K RAAB, J RENK, B SANDER, HG SCHMIDT, H STEEG, F WALTHER, SM WOLF, B AUBERT, JJ BENCHOUK, C BONISSENT, A CARR, J COYLE, P DRINKARD, J ETIENNE, F PAPALEXIOU, S PAYRE, P QIAN, Z ROOS, L ROUSSEAU, D SCHWEMLING, P TALBY, M ADLUNG, S BAUER, C BLUM, W BROWN, D CATTANEO, P COWAN, G DEHNING, B DIETL, H DYDAK, F FERNANDEZBOSMAN, M FRANK, M HALLEY, AW LAUBER, J LUTJENS, G LUTZ, G MANNER, W RICHTER, R ROTSCHEIDT, H SCHRODER, J SCHWARZ, AS SETTLES, R SEYWERD, H STIERLIN, U STIEGLER, U STDENIS, R TAKASHIMA, M THOMAS, J WOLF, G BOUCROT, J CALLOT, O CORDIER, A DAVIER, M GRIVAZ, JF HEUSSE, P JAFFE, DE JANOT, P KIM, DW LEDIBERDER, F LEFRANCOIS, J LUTZ, AM SCHUNE, MH VEILLET, JJ VIDEAU, I ZHANG, Z ABBANEO, D AMENDOLIA, SR BAGLIESI, G BATIGNANI, G BOSISIO, L BOTTIGLI, U BOZZI, C BRADASCHIA, C CARPINELLI, M CIOCCI, MA DELLORSO, R FERRANTE, I FIDECARO, F FOA, L FOCARDI, E FORTI, F GIASSI, A GIORGI, MA LIGABUE, F MANNELLI, EB MARROCCHESI, PS MESSINEO, A PALLA, F RIZZO, G SANGUINETTI, G SPAGNOLO, P STEINBERGER, J TENCHINI, R TONELLI, G TRIGGIANI, G VANNINI, C VENTURI, A VERDINI, PG WALSH, J CARTER, JM GREEN, MG MARCH, PV MIR, LM MEDCALF, T QUAZI, IS STRONG, JA WEST, LR BOTTERILL, DR CLIFFT, RW EDGECOCK, TR EDWARDS, M FISHER, SM JONES, TJ NORTON, PR SALMON, DP THOMPSON, JC BLOCHDEVAUX, B COLAS, P DUARTE, H KOZANECKI, W LEMAIRE, MC LOCCI, E LOUCATOS, S MONNIER, E PEREZ, P PERRIER, F RANDER, J RENARDY, JF ROUSSARIE, A SCHULLER, JP SCHWINDLING, J MOHAND, DS VALLAGE, B JOHNSON, RP LITKE, AM TAYLOR, G WEAR, J ASHMAN, JG BABBAGE, W BOOTH, CN BUTTAR, C CARNEY, RE CARTWRIGHT, S COMBLEY, F HATFIELD, F REEVES, P THOMPSON, LF BARBERIO, E BOHRER, A BRANDT, S GRUPEN, C RIVERA, F SCHAFER, U GIANNINI, G GOBBO, B RAGUSA, F BELLANTONI, L CHEN, W 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 WALSH, AM WEBER, FV WHITNEY, MH WU, SL WU, X ZOBERNIG, G TI MEASUREMENT OF THE B-]TAU(-)(NU)OVER-BAR(TAU)X BRANCHING RATIO SO PHYSICS LETTERS B LA English DT Article ID E+E ANNIHILATION; DECAYS AB Using a missing energy tag, evidence is presented for the decay b --> tau-nu(t C1 UNIV AUTONOMA BARCELONA, INST FIS ALTES ENERGIES, E-08193 BARCELONA, SPAIN. UNIV BARI, DIPARTIMENTO FIS, I-70126 BARI, ITALY. UNIV BARI, INFN, 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, IN2P3, CNRS, F-63177 CLERMONT FERRAND, FRANCE. NIELS BOHR INST, DK-2100 COPENHAGEN, DENMARK. DEMOKRITOS NATL CTR SCI RES, GR-15310 ATHENS, GREECE. ECOLE POLYTECH, PHYS NUCL & HAUTES ENERGIES LAB, IN2P3, CNRS, F-91128 PALAISEAU, FRANCE. UNIV EDINBURGH, DEPT PHYS, EDINBURGH EH9 3JZ, MIDLOTHIAN, SCOTLAND. UNIV FLORENCE, INFN, DIPARTIMENTO FIS, I-50125 FLORENCE, ITALY. FLORIDA STATE UNIV, SUPERCOMP COMPUTAT RES INST, TALLAHASSEE, FL 32306 USA. FLORIDA STATE UNIV, DEPT PHYS, TALLAHASSEE, FL 32306 USA. INFN, LNF, LAB NAZL, 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, IN2P3, CNRS, F-13288 MARSEILLE, FRANCE. MAX PLANCK INST PHYS & ASTROPHYS, WERNER HEISENBERG INST, W-8000 MUNICH, GERMANY. UNIV PARIS 11, ACCELERATEUR LINEAIRE LAB, IN2P3, CNRS, F-91405 ORSAY, FRANCE. UNIV LONDON, ROYAL HOLLOWAY & BEDFORD NEW COLL, DEPT PHYS, LONDON TW2 0EX, SURREY, ENGLAND. RUTHERFORD APPLETON LAB, DEPT PARTICLE PHYS, DIDCOT OX11 0QX, OXON, ENGLAND. CE SACLAY, DAPNIA, SERV PHYS PARTICULES, F-91191 GIF SUR YVETTE, FRANCE. UNIV CALIF SANTA CRUZ, INST PARTICLE PHYS, SANTA CRUZ, CA 95064 USA. UNIV SHEFFIELD, DEPT PHYS, SHEFFIELD S3 7RH, S YORKSHIRE, ENGLAND. UNIV PISA, INFN, DIPARTIMENTO FIS, I-56100 PISA, ITALY. SCUOLA NORMALE SUPER PISA, I-56100 PISA, ITALY. UNIV SIEGEN, FACHBEREICH PHYS, W-5900 SIEGEN, GERMANY. UNIV TRIESTE, DIPARTIMENTO FIS, I-34127 TRIESTE, ITALY. INFN, I-34127 TRIESTE, ITALY. UNIV WISCONSIN, DEPT PHYS, MADISON, WI 53706 USA. CNR, IST COSMOGEOFIS, TURIN, ITALY. UNIV WASHINGTON, SEATTLE, WA 98195 USA. UNIV TURIN, IST FIS GEN, I-10124 TURIN, ITALY. UNIV NAPLES, DIPARTIMENTO SCI FIS, I-80138 NAPLES, ITALY. LBL, BERKELEY, CA 94720 USA. RP BUSKULIC, D (reprint author), CNRS, IN2P3, PHYS PARTICULES LAB, F-74019 ANNECY LE VIEUX, FRANCE. RI 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; 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; 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 OI 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; 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; Stahl, Achim/0000-0002-8369-7506; NR 12 TC 35 Z9 35 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 JAN 14 PY 1993 VL 298 IS 3-4 BP 479 EP 491 DI 10.1016/0370-2693(93)91853-F PG 13 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KJ489 UT WOS:A1993KJ48900038 ER PT J AU ALBINATI, A CHALOUPKA, S DEMARTIN, F KOETZLE, TF RUEGGER, H VENANZI, LM WOLFER, MK AF ALBINATI, A CHALOUPKA, S DEMARTIN, F KOETZLE, TF RUEGGER, H VENANZI, LM WOLFER, MK TI COMPLEXES WITH PT-H-AG BONDS SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID METAL HYDRIDE COMPLEXES; LIGANDS; GOLD AB Silver ions react with 2 equiv of the hydrides trans-[PtH(C6X5)(PR3)2] (X = F and Cl, R = Me and Et; X = H, R = Et) to give trinuclear complex cations of the type [(PR3)2(C6X5)Pt(mu-H)Ag(A-H)Pt(C6X5)(PR3)2]+ which were characterized by multinuclear NMR spectroscopy. A full report of the X-ray crystal structure of [(PEt3)2(C6Cl5)Pt(mu-H)Ag(mu-H)Pt-(C6Cl5)(PEt3)2](CF3SO3) is also given. The silver ion in this complex is linear with two hydride ligands, the H-Ag-H angle being ca. 152-degrees. Significant Pt...Ag direct interactions are also likely to occur. Crystal data: space group P1BAR, a = 13.853 (3) angstrom,b = 14.214 (2) angstrom, c = 15.611 (3) angstrom, alpha = 94.64 (2)degrees, beta = 90.48 (2)degrees, gamma = 110.39 (2)degrees, Z = 2, V = 2869.7 angstrom3, rho(calcd) = 1.875 g cm-3, R = 0.049. The reaction of AgCF3SO3 and trans-[PtH(C6Cl5)(PEt3)2], in a 1:1 ratio, gave the complex [(PEt3)2(C6Cl5)Pt(mu-H)Ag(H2O)](CF3SO3), which was characterized by multinuclear NMR spectroscopy and by X-ray and neutron diffraction. Also in this complex, the silver ion is linearly coordinated. Here, however, it is bonded to one hydride ligand and to one water molecule. Crystal data (neutron, 24 K): space group P1BAR, a = 8.581 (2) angstrom, b = 12.053 (3) angstrom, c = 15.519 (3) angstrom, alpha = 87.86 (2)degrees, beta = 73.55 (2)degrees, gamma = 81.76 (2)degrees, Z = 2, V = 1523 angstrom3, rho(calcd) = 2.105 g cm-3, R(F2) = 0.081. C1 SWISS FED INST TECHNOL,ANORGAN CHEM LAB,CH-8092 ZURICH,SWITZERLAND. BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. UNIV MILAN,IST CHIM FARMACEUT,I-20131 MILAN,ITALY. RI Demartin, Francesco/M-9957-2016; Albinati, Alberto/I-1262-2015 OI Demartin, Francesco/0000-0003-2942-3990; Albinati, Alberto/0000-0002-8779-3327 NR 34 TC 30 Z9 30 U1 1 U2 2 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 JAN 13 PY 1993 VL 115 IS 1 BP 169 EP 175 DI 10.1021/ja00054a023 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA KG954 UT WOS:A1993KG95400023 ER PT J AU MITRAKIRTLEY, S MULLINS, OC VANELP, J GEORGE, SJ CHEN, J CRAMER, SP AF MITRAKIRTLEY, S MULLINS, OC VANELP, J GEORGE, SJ CHEN, J CRAMER, SP TI DETERMINATION OF THE NITROGEN CHEMICAL STRUCTURES IN PETROLEUM ASPHALTENES USING XANES SPECTROSCOPY SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID ABSORPTION FINE-STRUCTURE; SHELL PHOTOABSORPTION; ORGANIC SULFUR; BOND LENGTHS; COAL; FORMS; RESONANCES; MOLECULES; PHASE; N-2 AB Extensive nitrogen K-edge X-ray absorption studies have been performed for the first time on seven petroleum asphaltenes and nitrogen standard compounds for the purpose of determining chemical forms of nitrogen present in the asphaltenes; such an objective is difficult to achieve by any other method. Sulfur XANES studies on fossil fuel samples have provided a rich source of information for thc last ten years; similar XANES studies of nitrogen in fossil fuels have only recently been successfully performed using new, advanced fluorescence detection. Generally, the spectra of different chemical forms of nitrogen produce readily distinguishable features, thereby facilitating asphaltene analysis. Approximate contributions from different nitrogen structures present in the asphaltenes are calculated by comparing normalized areas under corresponding resonances in the spectra of the asphaltenes and the model compounds. The standard model compounds of nitrogen studied are pyrroles, pyridines, saturated amines, and metalloporphyrins. Most of the nitrogen in asphaltenes is found to be present in aromatic forms, with a very small amount as saturated amine. The pyrrole form of nitrogen is more abundant than the pyridine form in asphaltenes, and the pyridine fraction in different asphaltenes is somewhat variable. Pyridine, which is more basic than pyrrole, shows pi* resonances shifted to significantly lower energies than those observed for pyrroles. The relative positions of nitrogen pi* resonances are determined according to whether the nitrogen lone pair of electrons is shared in the pi aromatic system. These spectral shifts are largely produced by resonance effects rather than inductive effects, which are observed in the sulfur case. Spectra of more complicated molecules such as porphyrins and imidazoles are explained along similar lines. The saturated amine shows only a sigma* resonance. Sensitivity of the spectra to surface effects is explored by comparing electron yield and fluoresence data. C1 SCHLUMBERGER DOLL RES CTR,RIDGEFIELD,CT 06877. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF DAVIS,DAVIS,CA 95616. NR 38 TC 128 Z9 131 U1 1 U2 21 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 JAN 13 PY 1993 VL 115 IS 1 BP 252 EP 258 DI 10.1021/ja00054a036 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA KG954 UT WOS:A1993KG95400036 ER PT J AU WARREN, WL TUTTLE, BA SUN, BN HUANG, Y PAYNE, DA AF WARREN, WL TUTTLE, BA SUN, BN HUANG, Y PAYNE, DA TI PARAMAGNETIC-RESONANCE OF PLATINUM IONS IN PBTIO3 SINGLE-CRYSTALS SO APPLIED PHYSICS LETTERS LA English DT Article ID BATIO3 AB Optical excitation of trivalent platinum (5d7, t6e) ions in lead titanate single crystals have been observed for the first time by electron paramagnetic resonance (EPR). The g and hyperfine coupling A tensors were found to be axial: g(parallel-to) = 1.938, g(perpendicular-to) = 2.478, A(parallel-to) = 0.0164 cm-1, and A(perpendicular-to) = 0.0324 cm-1. Analysis of the EPR spectra using crystal field theory indicates that the Pt+3 ions are in tetragonally distorted (elongated) octahedral sites, strongly suggesting that they substitute for the central Ti+4 ions in the perovskite lattice. C1 UNIV ILLINOIS,BECKMAN INST,URBANA,IL 61801. UNIV ILLINOIS,DEPT MAT SCI & ENGN,MAT RES LAB,URBANA,IL 61801. RP WARREN, WL (reprint author), SANDIA NATL LABS,DEPT GLASS & ELECTR CERAM,ALBUQUERQUE,NM 87185, USA. NR 15 TC 11 Z9 11 U1 0 U2 2 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 JAN 11 PY 1993 VL 62 IS 2 BP 146 EP 148 DI 10.1063/1.109353 PG 3 WC Physics, Applied SC Physics GA KF689 UT WOS:A1993KF68900012 ER PT J AU HUNDLE, BS OBRIEN, DA BEYER, P KLEINIG, H HEARST, JE AF HUNDLE, BS OBRIEN, DA BEYER, P KLEINIG, H HEARST, JE TI INVITRO EXPRESSION AND ACTIVITY OF LYCOPENE CYCLASE AND BETA-CAROTENE HYDROXYLASE FROM ERWINIA-HERBICOLA SO FEBS LETTERS LA English DT Article DE ZEAXANTHIN; LYCOPENE; BETA-CAROTENE; ERWINIA-HERBICOLA; CYCLASE; HYDROXYLASE; OVEREXPRESSION ID DAFFODIL CHROMOPLASTS; ESCHERICHIA-COLI; BIOSYNTHESIS; POLYMERASE AB The cyclisation of lycopene to beta-carotene and the hydroxylation of beta-carotene to zeaxanthin are common enzymatic steps in the biosynthesis of carotenoids in a wide range of bacteria, fungi, and plants. We have individually expressed in E. coli the two genes coding for these enzymatic steps in Erwinia herbicola. The cyclase and hydroxylase enzymes have apparent molecular weights of 43 kDa and 22 kDa, respectively, as determined by SDS-PAGE. Hydroxylase in vitro activity was obtained only in the cytoplasmic fraction. Cyclase also demonstrated enzyme activity in a crude cell-free lysate, although to a lesser extent. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV CHEM BIODYNAM,BERKELEY,CA 94720. UNIV FREIBURG,INST BIOL 2,W-7800 FREIBURG,GERMANY. FU NIEHS NIH HHS [2 T32 ES07075-11] NR 21 TC 41 Z9 45 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0014-5793 J9 FEBS LETT JI FEBS Lett. PD JAN 11 PY 1993 VL 315 IS 3 BP 329 EP 334 DI 10.1016/0014-5793(93)81188-6 PG 6 WC Biochemistry & Molecular Biology; Biophysics; Cell Biology SC Biochemistry & Molecular Biology; Biophysics; Cell Biology GA KG757 UT WOS:A1993KG75700024 PM 8422926 ER PT J AU KWON, YU CORBETT, JD AF KWON, YU CORBETT, JD TI THE LEAD ZIRCONIUM SYSTEM - BINARY PHASES AND A SERIES OF INTERSTITIAL COMPOUNDS OF THE HOST ZR5PB3 SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article ID MULTIPLIER; CHEMISTRY; BREEDER; ZR5SB3 AB The Pb-Zr system contains the phases Zr(approximately 5.8)Pb (Cr3Si-type), Zr5Pb3 (Mn5Si3) and Zr5Pb4 (Ti5Ga4). Zr5Pb4 as a substoichiometric region above approximately 800-degrees-C, extending to about Zr5Pb3.65 at 1000-degrees-C. Reactive powder sintering in sealed Ta containers at 1000-1350-degrees-C is the most effective route for the synthesis of pure phases of both the binaries and the interstitial derivatives Zr5Pb3Z. Twenty examples of the latter were obtained with Z = Al, Si, P, S, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Se, Ag, Cd, In, Sn, Sb, Te, (Pb), (second period Z were not investigated). Single crystals for Z = Al, Cd, Zn, Pb0.87, Pb0.94 were obtained by metal flux or vapor phase transport reactions, and the last three were quantified by X-ray crystallography. Volume trends as a function of group and period follow metal/covalent radii trends for Z fairly well. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. NR 24 TC 18 Z9 18 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 JAN 11 PY 1993 VL 190 IS 2 BP 219 EP 227 DI 10.1016/0925-8388(93)90402-9 PG 9 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA KF326 UT WOS:A1993KF32600019 ER PT J AU SLANSKY, R AF SLANSKY, R TI AN ALGEBRAIC ROLE FOR ENERGY AND NUMBER OPERATORS FOR MULTIPARTICLE STATES SO NUCLEAR PHYSICS B LA English DT Article AB The role of the hamiltonian in the symmetry structure of a two-dimensional conformal field theory is reviewed in the context of Kac-Moody algebras. We explore a natural way to extend a Kac-Moody algebra to include the hamiltonian and number (or level operator in conformal field theory) operators in a generalized symmetry. In particular, both operators may be in the Cartan subalgebra of one of the recently discovered Borcherds algebras. Several representations of Borcherds algebras are computed to show their typical features. We study the extension of affine su(2) to a Borcherds algebra in some detail, and explicitly demonstrate the above claims. RP SLANSKY, R (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,MS B210,LOS ALAMOS,NM 87545, USA. NR 5 TC 8 Z9 8 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD JAN 11 PY 1993 VL 389 IS 2 BP 349 EP 364 DI 10.1016/0550-3213(93)90325-J PG 16 WC Physics, Particles & Fields SC Physics GA KL109 UT WOS:A1993KL10900002 ER PT J AU RABINOWITZ, SA ARROYO, C BACHMANN, KT BAZARKO, AO BOLTON, T FOUDAS, C KING, BJ LEFMANN, WC LEUNG, WC MISHRA, SR OLTMAN, E QUINTAS, PZ SCIULLI, FJ SELIGMAN, WG SHAEVITZ, MH MERRITT, FS OREGLIA, MJ SCHUMM, BA BERNSTEIN, RH BORCHERDING, F FISK, HE LAMM, MJ MARSH, W MERRITT, KWB SCHELLMAN, HM YOVANOVITCH, DD BODEK, A BUDD, HS DEBARBARO, P SAKUMOTO, WK KINNEL, T SANDLER, PH SMITH, WH AF RABINOWITZ, SA ARROYO, C BACHMANN, KT BAZARKO, AO BOLTON, T FOUDAS, C KING, BJ LEFMANN, WC LEUNG, WC MISHRA, SR OLTMAN, E QUINTAS, PZ SCIULLI, FJ SELIGMAN, WG SHAEVITZ, MH MERRITT, FS OREGLIA, MJ SCHUMM, BA BERNSTEIN, RH BORCHERDING, F FISK, HE LAMM, MJ MARSH, W MERRITT, KWB SCHELLMAN, HM YOVANOVITCH, DD BODEK, A BUDD, HS DEBARBARO, P SAKUMOTO, WK KINNEL, T SANDLER, PH SMITH, WH TI MEASUREMENT OF THE STRANGE SEA DISTRIBUTION USING NEUTRINO CHARM PRODUCTION SO PHYSICAL REVIEW LETTERS LA English DT Article ID E+E ANNIHILATION; ENERGIES; FREEDOM AB A high-statistics study by the Columbia-Chicago-Fermilab-Rochester Collaboration of opposite-sign dimuon events induced by neutrino-nucleon scattering at the Fermilab Tevatron is presented. A sample of 5044 nu(mu) and 1062 v(mu)BAR induced mu-/+mu+/- events with P(mu1) greater-than-or-equal-to 9 GeV/c, P(mu2) greater-than-or-equal-to 5 GeV/c, 30 less-than-or-equal-to E(nu) less-than-or-equal-to 600 GeV, and [Q2]=22.2 GeV2/c2 is observed. The data support the slow-rescaling model of charm production with a value of m(c)=1.31+/-0.24 GeV/c2. The first measurement of the Q2 dependence of the nucleon strange quark distribution xs(x) is presented. The data yield the Cabibbo-Kobayashi-Maskawa matrix element \V(cd)\=0.209+/-0.012 and the nucleon fractional strangeness content eta(s)=0.064(-0.007)+0.008. C1 UNIV CHICAGO,CHICAGO,IL 60637. FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV ROCHESTER,ROCHESTER,NY 14627. UNIV WISCONSIN,MADISON,WI 53706. RP RABINOWITZ, SA (reprint author), COLUMBIA UNIV,NEW YORK,NY 10027, USA. OI Bernstein, Robert/0000-0002-7610-950X NR 23 TC 156 Z9 156 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 JAN 11 PY 1993 VL 70 IS 2 BP 134 EP 137 DI 10.1103/PhysRevLett.70.134 PG 4 WC Physics, Multidisciplinary SC Physics GA KF880 UT WOS:A1993KF88000009 ER PT J AU FIELDS, T CORCORAN, MD AF FIELDS, T CORCORAN, MD TI NUCLEAR RESCATTERING EFFECTS IN MASSIVE DIHADRON PRODUCTION SO PHYSICAL REVIEW LETTERS LA English DT Article ID TRANSVERSE-MOMENTUM; NUMBER DEPENDENCE; COLLISIONS; HADRONS; PAIRS AB We describe some implications for massive dihadron production experiments of recent observations in Fermilab experiments E609 and E557 of large nuclear rescattering effects in dijet production in hard pA collisions. Substantial upward corrections to alpha (in the A(alpha) cross section parametrization) are indicated for dihadron experiments which detect symmetric back-to-back hadrons with narrow acceptance in azimuth or p(T). Other consequences of the large nuclear rescattering are also discussed. C1 RICE UNIV,TW BONNER LAB,HOUSTON,TX 77251. RP FIELDS, T (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 15 TC 7 Z9 7 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 11 PY 1993 VL 70 IS 2 BP 143 EP 145 DI 10.1103/PhysRevLett.70.143 PG 3 WC Physics, Multidisciplinary SC Physics GA KF880 UT WOS:A1993KF88000011 ER PT J AU OSET, E STROTTMAN, D AF OSET, E STROTTMAN, D TI HIGH-ENERGY PION-INDUCED DOUBLE CHARGE-EXCHANGE AND ISOVECTOR RENORMALIZATION SO PHYSICAL REVIEW LETTERS LA English DT Article ID NUCLEAR-STRUCTURE; DELTA-(1232) RESONANCE; SCATTERING AB The (pi+,pi-) double-charge-exchange reaction for pion energies of 200 to 1400 MeV is calculated with a zero-parameter Glauber theory that includes spin flip and pion absorption. Differential cross sections and excitation functions are obtained for C-14 and O-18 targets. Results for T(pi)=300-525 MeV are compared with recent experimental results and suggest a new quenching process. We have calculated effects of medium polarization on the isovector pion operator and find a strong reduction in good agreement with data. A pronounced dip in the cross section near T(pi)=1300 MeV offers a unique testing ground for unconventional mechanisms. C1 UNIV VALENCIA,CTR MIXTO,INST FIS CORPUSCULAR,CONSEJO SUPER INVEST CIENT,E-46100 BURJASSOT,SPAIN. UNIV WASHINGTON,INST NUCL THEORY,SEATTLE,WA 98105. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP OSET, E (reprint author), UNIV VALENCIA,CONSEJO SUPER INVEST CIENT,DEPT FIS TEORICA,E-46100 BURJASSOT,SPAIN. NR 33 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 JAN 11 PY 1993 VL 70 IS 2 BP 146 EP 149 DI 10.1103/PhysRevLett.70.146 PG 4 WC Physics, Multidisciplinary SC Physics GA KF880 UT WOS:A1993KF88000012 ER PT J AU CHO, JH CHOU, FC JOHNSTON, DC AF CHO, JH CHOU, FC JOHNSTON, DC TI PHASE-SEPARATION AND FINITE SIZE SCALING IN LA2-XSRXCUO4+DELTA[0-LESS-THAN-OR-EQUAL-TO(X,DELTA)LESS-THAN-OR-EQUAL-TO -0.03] SO PHYSICAL REVIEW LETTERS LA English DT Article ID LA2CUO4+DELTA; CRYSTAL; SUSCEPTIBILITY; DIFFRACTION; BEHAVIOR; NEUTRON AB A study of the phase diagram and magnetic susceptibility chi(x,delta,T) of the title system is reported. For delta congruent-to 0.03, macroscopic phase separation, below congruent-to 300 K into superconducting La2-xSrxCuO4+delta' (delta' congruent-to 0.08) and nonsuperconducting La2-xSrxCuO4+delta'' (delta'' congruent-to 0.00) phases, known to occur for x-0, disappears by x congruent-to 0.03. The behaviors of the Neel temperature T(N)(x) and chi(x,T) of the antiferromagnetic phase (0 less-than-or-equal-to x less than or similar to 0.02, delta'' congruent-to 0.00) reveal a novel microscopic segregation of the doped holes in this phase into walls of hole-rich material separating undoped domains. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. RP CHO, JH (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011, USA. NR 23 TC 133 Z9 133 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 JAN 11 PY 1993 VL 70 IS 2 BP 222 EP 225 DI 10.1103/PhysRevLett.70.222 PG 4 WC Physics, Multidisciplinary SC Physics GA KF880 UT WOS:A1993KF88000031 ER PT J AU OBRIEN, WL JIA, J DONG, QY CALLCOTT, TA MIYANO, KE EDERER, DL MUELLER, DR KAO, CC AF OBRIEN, WL JIA, J DONG, QY CALLCOTT, TA MIYANO, KE EDERER, DL MUELLER, DR KAO, CC TI SOFT-X-RAY EMISSION INSULATORS - SPECTATOR VERSUS NORMAL EMISSION SO PHYSICAL REVIEW LETTERS LA English DT Article ID PHOTOELECTRON-SPECTROSCOPY; PHONON RELAXATION; CORE EXCITON; SPECTRA; DECAY; BN AB We investigate the excitation energy dependence of the boron K soft-x-ray emission of B2O3 and hexagonal-BN using synchrotron radiation. When exciting into the core exciton state the spectra are shifted to lower energy by 1.5 and 1.8 eV, respectively. This shift is found to be a result of phonon relaxation and differences in initial- and final-state electronic screening. C1 UNIV TENNESSEE,KNOXVILLE,TN 37996. TULANE UNIV,NEW ORLEANS,LA 70118. NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899. BROOKHAVEN NATL LAB,UPTON,NY 11973. NR 15 TC 64 Z9 64 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 JAN 11 PY 1993 VL 70 IS 2 BP 238 EP 241 DI 10.1103/PhysRevLett.70.238 PG 4 WC Physics, Multidisciplinary SC Physics GA KF880 UT WOS:A1993KF88000035 ER PT J AU CASADO, JA AF CASADO, JA TI SUBNUCLEAR SHADOWING EFFECT ON THE J/PSI PRODUCTION SO EUROPHYSICS LETTERS LA English DT Article ID J-PSI-SUPPRESSION; NUCLEUS-NUCLEUS COLLISIONS AB A parton model for the J/psi production in hadron-nucleus and nucleus-nucleus collisions is presented. It takes account of the finite-energy constraint along with the requirement of unitarity. Two extreme regimes are found for which the J/psi- production cross-sections have different behaviours according to nuclear mass numbers. C1 LAWRENCE BERKELEY LAB, DEPT NUCL SCI, BERKELEY, CA 94720 USA. NR 12 TC 0 Z9 0 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 0295-5075 J9 EUROPHYS LETT JI Europhys. Lett. PD JAN 10 PY 1993 VL 21 IS 2 BP 163 EP 168 DI 10.1209/0295-5075/21/2/007 PG 6 WC Physics, Multidisciplinary SC Physics GA KG904 UT WOS:A1993KG90400007 ER PT J AU LU, ZW WEI, SH ZUNGER, A AF LU, ZW WEI, SH ZUNGER, A TI RELATIVITY-INDUCED ORDERING AND PHASE-SEPARATION IN INTERMETALLIC COMPOUNDS SO EUROPHYSICS LETTERS LA English DT Article ID TRANSITION-METAL ALLOYS; GROUND-STATE; 1ST-PRINCIPLES CALCULATION; DIAGRAMS; SEGREGATION; STABILITY AB The formation enthalpies of ordered compounds and the mixing enthalpies of random alloys were calculated for Ni-Au, Ni-Pt, and Au-Pt using an Ising-like cluster expansion based on the local-density formalism. We show that relativity i) induces long-range order in Ni-Pt due to a reduction in packing strain and enhancement of s-d coupling, but ii) it leads to phase separation in Au-Pt due to suppression of the Au(s, p) --> Pt(d) charge transfer. RP LU, ZW (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. RI Zunger, Alex/A-6733-2013 NR 26 TC 33 Z9 33 U1 0 U2 5 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 0295-5075 J9 EUROPHYS LETT JI Europhys. Lett. PD JAN 10 PY 1993 VL 21 IS 2 BP 221 EP 226 DI 10.1209/0295-5075/21/2/017 PG 6 WC Physics, Multidisciplinary SC Physics GA KG904 UT WOS:A1993KG90400017 ER PT J AU WANAMAKER, BJ DUBA, AG AF WANAMAKER, BJ DUBA, AG TI ELECTRICAL-CONDUCTIVITY OF SAN CARLOS OLIVINE ALONG [100] UNDER OXYGEN-BUFFERED AND PYROXENE-BUFFERED CONDITIONS AND IMPLICATIONS FOR DEFECT EQUILIBRIA SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID STABILITY FIELD; POINT-DEFECTS; NONSTOICHIOMETRY; PRESSURE; CREEP AB The electrical conductivity along [100] of single crystal San Carlos olivine was measured as a function of temperature between 1100-degrees and 1200-degrees-C and oxygen fugacity between 10(-6) and 10(+0.5) Pa (at 1200-degrees-C), and either with (''pyroxene-buffered'') or without (''self-buffered'') an added natural pyroxene buffer from a San Carlos lherzolite. Under these temperature and fO2 conditions, electrical conduction in the self-buffered sample is attributed to polarons (Fe.) and electrons (e/) and in the pyroxene-buffered sample is attributed to polarons (Fe.) and magnesium vacancies (V//Mg). Over the range of temperature and fO2 investigated, the electrical conductivity of the self-buffered sample is given by sigma(sb)[100] = 2.27(S/m)e-0.55(eV)/kT fO2(0.18) +306.3(S/m)e-2.25(eV)/kT fO2(-0.18) and for the pyroxene-buffered sample by sigma(pb)[100] = 0.18(S/m)e-0.34(eV)/kT fO2(0.17) +15.2(S/m)e-1.3(eV)/kT where k is Boltzmann's constant, T is in Kelvin, and fO2 is in atmospheres. The conductivity of the pyroxene-buffered sample is lower than that of the self-buffered sample, primarily as a result of a decrease in the polaron concentration. The electrical conductivity of both samples was found to decrease irreversibly once the samples experienced an oxygen fugacity more reducing than approximately the wustite-magnetite buffer. Electron microprobe analyses indicate that this effect results from low of iron from the olivine samples to the iridium electrodes. A series conduction model based on the observed compositional gradient adequately accounts for the magnitude of the irreversible conductivity decrease and limits the thickness of any surficial pyroxene phase to <0.1 mum. Mantle temperature profiles based on laboratory measurements of self-buffered samples predict temperatures of the order of between 25-degrees and 150-degrees-C colder, depending on the ambient oxygen fugacity, than those based on measurements of pyroxene-buffered samples. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. NR 33 TC 50 Z9 57 U1 1 U2 9 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9313 EI 2169-9356 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD JAN 10 PY 1993 VL 98 IS B1 BP 489 EP 500 DI 10.1029/92JB01584 PG 12 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KG667 UT WOS:A1993KG66700010 ER PT J AU VAUGHAN, PJ UDELL, KS WILT, MJ AF VAUGHAN, PJ UDELL, KS WILT, MJ TI THE EFFECTS OF STEAM INJECTION ON THE ELECTRICAL-CONDUCTIVITY OF AN UNCONSOLIDATED SAND SATURATED WITH A SALT SOLUTION SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID PHASE LIQUID TRANSPORT; CLEANUP AB The spatial and temporal variation of electrical conductivity in saturated sands during steam injection has been measured and modelled. Experiments consisted of introducing steam into one end of a tube filled with sand saturated with a slightly saline solution. A steam condensation front formed, separating the mixed-phase steam zone from the liquid zone. Measurements of electrical conductivity were made at 10 locations along the tube using a four-electrode technique. Results show that conductivity starts at a constant value, decreases before the steam front arrives and then, immediately prior to the steam front arrival, goes through a maximum before dropping by a factor of about 25. These variations can be explained by first, a dilution of the interstitial solution causing the initial drop in conductivity; second, an increase in temperature of the solution immediately prior to the arrival of the steam front causing the conductivity maximum; and finally, the large drop in conductivity due to the combined effects of a decrease in saturation and dilution of the residual liquid in the two-phase zone. Mathematical solutions of a set of differential equations that take into consideration all of these effects are presented. These solutions reproduce the significant features of the conductivity data This study suggests that the measurement of changes in the subsurface conductivity field during steam injection operations may indicate the location of ionic concentration, temperature, and steam saturation fields. C1 UNIV CALIF BERKELEY,DEPT MECH ENGN,BERKELEY,CA 94720. LAWRENCE LIVERMORE NATL LAB,DIV ENGN RES,LIVERMORE,CA 94550. RP VAUGHAN, PJ (reprint author), UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720, USA. NR 27 TC 4 Z9 4 U1 1 U2 2 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 JAN 10 PY 1993 VL 98 IS B1 BP 509 EP 518 DI 10.1029/92JB01694 PG 10 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KG667 UT WOS:A1993KG66700012 ER PT J AU WOHLETZ, KH RAYMOND, R AF WOHLETZ, KH RAYMOND, R TI ATMOSPHERIC DUST DISPERSAL ANALYZED BY GRANULOMETRY OF THE MISERS GOLD EVENT SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID SEQUENTIAL FRAGMENTATION AB Granulometric analysis of ejecta from Misers Gold. high explosive cratering experiment demonstrates that atmospheric dust dispersal can be evaluated by particle-size distribution d.ata. From size analyses of the Misers Gold preshot test bed alluvium, ejecta, and sweep-up materials collected out to 35 crater radii (1227 m), we find that approximately 5.9 x 10(6) kg (approximately 11% of the total crater ejecta mass) was depleted from the crater ejecta deposits and likely represents the portion of the cratered mass initially lofted into atmospheric suspension. The dominant size range of this lofted dust was 88 to 2000 mum with a mean diameter by mass of 384 mum. In addition to the dust lofted in the explosion column, dust in the size range of 100-800 mum was swept up from the ground by the explosive air blast and base surge dominantly between ranges of 10 and 18 crater radii (360 and 650 m from ground zero). This sweep-up dust was convectively drawn into the column and contributed up to 2% of the total mass of lofted. Based on the measured abundance of coarse (>250 mum diameter) dust particles in the estimated lofted dust, it is likely that about 70% of this lofted mass fell out within about 1 hour, such that the remaining dust cloud mass was approximately 1.8 x 10(6) kg, which is equivalent to a dust lofted per unit blast yield of 0.5 kT/kT or about 4% of the crater ejecta mass. This study supports the hypothesis that if initial distributions can be constrained, the volume of dust lofted into atmospheric suspension from large surface explosions can be estimated from analysis of particle-size distributions of ejecta deposited near the explosion. This result may have particular applications to study of the atmospheric effects of historic and prehistoric volcanic eruptions. RP WOHLETZ, KH (reprint author), LOS ALAMOS NATL LAB, DIV EARTH & ENVIRONM SCI, EES-1, MS D-462, LOS ALAMOS, NM 87545 USA. NR 15 TC 3 Z9 3 U1 1 U2 2 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 JAN 10 PY 1993 VL 98 IS B1 BP 557 EP 566 DI 10.1029/92JB01888 PG 10 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KG667 UT WOS:A1993KG66700016 ER PT J AU HOLFORD, DJ SCHERY, SD WILSON, JL PHILLIPS, FM AF HOLFORD, DJ SCHERY, SD WILSON, JL PHILLIPS, FM TI MODELING RADON TRANSPORT IN DRY, CRACKED SOIL SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID FRACTURED POROUS-MEDIA; SOLUTE TRANSPORT; DIFFUSION; FLOW; PRESSURE; ISOTOPES; MATRIX AB A two-dimensional finite element code was used to investigate the effect of changes in surface air pressure on radon flux from soil with parallel, partially penetrating cracks. A sensitivity analysis investigates the effects of various crack dimensions, soil characteristics, and surface air pressure on radon flux from the soil surface to the atmosphere. Simulation results indicate that radon flux is most sensitive to soil properties; the diffusion coefficient is most important, followed by permeability and porosity. Radon flux is also sensitive to changes in barometric pressure, which cause variations in radon flux above and below the average diffusive flux. Sinusoidal variations in barometric pressure cause a net increase in the average radon flux from the soil, because increases in flux during periods of decreasing pressure are greater than the decreases in flux during periods of decreasing pressure of equal magnitude. Cracks were found to significantly increase radon flux from soils of low permeability. C1 NEW MEXICO INST MIN & TECHNOL, SOCORRO, NM 87801 USA. RP HOLFORD, DJ (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. NR 32 TC 33 Z9 34 U1 0 U2 3 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 JAN 10 PY 1993 VL 98 IS B1 BP 567 EP 580 DI 10.1029/92JB01845 PG 14 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KG667 UT WOS:A1993KG66700017 ER PT J AU PICKETT, DA SALEEBY, JB AF PICKETT, DA SALEEBY, JB TI THERMOBAROMETRIC CONSTRAINTS ON THE DEPTH OF EXPOSURE AND CONDITIONS OF PLUTONISM AND METAMORPHISM AT DEEP LEVELS OF THE SIERRA-NEVADA BATHOLITH, TEHACHAPI MOUNTAINS, CALIFORNIA SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID SOUTHERN-CALIFORNIA; NEW-HAMPSHIRE; TRIPLE POINT; GARNET; HORNBLENDE; CRUSTAL; CALIBRATION; PRESSURE; SYSTEM; H2O AB We present thermodynamic estimate of pressures, temperatures, and volatile activities in variably deformed, gabbroic to granitic, Cretaceous (115-100 Ma) batholithic and framework rocks of the Tehachapi Mountains, southernmost Sierra Nevada, California. Al contents of hornblende in granitoids imply igneous emplacement at approximately 8 kbar in the southernmost Tehachapi Mountains, with lower pressures (3-7 kbar) to the north. Metamorphic pressures and temperatures for garnet-bearing paragneisses and metaigneous rocks were estimated on the basis of garnet-hornblende-plagioclase-quartz and garnet-biotite-plagioclase-quartz thermobarometers. Disparate results for the metaigneous rocks from the latter system point to the difficulty of applying pelite-based thermobarometers to rocks of contrasting composition and mineralogy. Preferred pressures cluster at 7.1-9.4 and 3.6-4.3 kbar. Incomplete knowledge of reaction histories, however, limits our interpretation of the lower pressures because they are minimum estimates. The approximately 4-kbar samples are all from a small area and, if our interpretation is correct, they imply a local, more shallow event superimposed on crust once residing at deeper structural levels. Garnet-hornblende and garnet-biotite temperatures are less coherent, likely owing to retrograde Fe-Mg exchange, and range from 570-degrees to 790-degrees-C. The majority of the rocks are igneous and affected by recrystallization and metamorphism during subsolidus cooling; they are not granulites. Country rock paragneisses are typically migmatized at ''peak'' metamorphic conditions near that of the wet granite solidus (greater-than-or-equal-to 690-degrees-C). Veinlike paragenesis of garnet in the metaigneous rocks suggests formation related to the presence of a fluid phase. Thermodynamic estimates of volatile activities in these garnet-bearing assemblages suggest variable, mostly CO2-rich fluid compositions, in the absence of any pervasive fluid flux. The igneous rocks of the Tehachapi Mountains were thus intruded at depths of approximately 30 km, making them the deepest known exposed components of the Cretaceous Sierra Nevada batholith. Metamorphism occurred at these great depths and, perhaps, locally after approximately 15 km of uplift before approximately 87 Ma, implying an uplift rate of 1.2 mm/yr. (A minimum uplift rate is 0.6 mm/yr.) This original uplift and possible subsequent uplift events may have been related to underthrusting of a block of Rand Schist from what is now the southeast, with concomitant widespread ductile deformation. The deduced pressure-temperature and uplift history is similar to those of high-pressure/high-temperature Cretaceous batholithic rocks in Salinia and the San Gabriel Mountains, but direct correlation is not warranted. When compared with higher-level intrusive rocks from analogous portions of the Sierra Nevada batholith to the north, the Tehachapi rocks reveal a deep batholith that is more heterogeneous and somewhat more mafic on average, but displaying a similar level of isotopic hybridization involving mantle and crustal sources. The batholith is quartz-rich at these levels, suggestive of a weak, ductile middle crust susceptible to prolonged deformation and possible delamination. C1 CALTECH,DIV GEOL & PLANETARY SCI,PASADENA,CA 91125. RP PICKETT, DA (reprint author), LOS ALAMOS NATL LAB,MS J514,LOS ALAMOS,NM 87544, USA. NR 86 TC 64 Z9 67 U1 0 U2 5 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 JAN 10 PY 1993 VL 98 IS B1 BP 609 EP 629 DI 10.1029/92JB01889 PG 21 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KG667 UT WOS:A1993KG66700019 ER PT J AU PULLIAM, RJ VASCO, DW JOHNSON, LR AF PULLIAM, RJ VASCO, DW JOHNSON, LR TI TOMOGRAPHIC INVERSIONS FOR MANTLE-P WAVE VELOCITY STRUCTURE BASED ON THE MINIMIZATION OF L2 AND L1 NORMS OF INTERNATIONAL SEISMOLOGICAL CENTER TRAVEL TIME RESIDUALS SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID PACIFIC; HETEROGENEITY; HYPOCENTERS; PROJECTION; SUBDUCTION; LOCATION; BENEATH; MODEL; PLATE; SLAB AB We use International Seismological Centre (ISC) P arrival data (1964-1987) and iterative algorithms which minimize the l1 and l2 residual norms to solve simultaneously for three-dimensional P velocity variations in Earth's mantle, source mislocations, and station corrections. We find that the maximum velocity perturbations produced by the l1 minimization (approximately +/-4% in our final model) are relatively insensitive to smoothing and damping constraints. Therefore, using an l1 norm criterion allows us to keep the bias introduced to the inversion to a minimum. Among the well-resolved features contained in both the l1 and the 12 velocity models are a fast anomaly in the lower mantle beneath the Tonga-New Hebrides subduction zone to a depth of 1670 km and another fast anomaly beneath the Japanese island arc and eastern Asia. Continuity between these anomalies and shallower fast anomalies is not clear. A fast anomaly extending from 670 km to 2070 km depth appears beneath eastern North America, the Caribbean, and north central South America. A broad, fast anomaly appears beneath eastern Asia just above the core-mantle boundary as well as several slow anomalies under the Pacific basin of comparable size. Both models contain a circum-Pacific ring of 2% lower velocities in the depth range 0-200 km, associated with back arc basins. High velocities (over 2%) associated with the continental shields tend to disappear below 400 km, though a significant region of high velocity remains beneath the Siberian platform in the 400 to 670 km depth interval. C1 UNIV CALIF BERKELEY, DEPT GEOL & GEOPHYS, BERKELEY, CA 94720 USA. LAWRENCE BERKELEY LAB, CTR COMPUTAT SEISMOL, BERKELEY, CA 94720 USA. RP PULLIAM, RJ (reprint author), UNIV CALIF BERKELEY, DEPT STAT, BERKELEY, CA 94720 USA. RI Vasco, Donald/I-3167-2016; OI Vasco, Donald/0000-0003-1210-8628; Pulliam, Robert/0000-0001-7661-359X NR 60 TC 76 Z9 78 U1 0 U2 2 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 JAN 10 PY 1993 VL 98 IS B1 BP 699 EP 734 DI 10.1029/92JB01053 PG 36 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KG667 UT WOS:A1993KG66700024 ER PT J AU TAYLOR, TN CAMPBELL, CT AF TAYLOR, TN CAMPBELL, CT TI SEGREGATION EFFECTS IN NOBLE-METAL FILM GROWTH ON BI(0001) - INSIGHTS FROM AUGER ANALYSIS SO SURFACE SCIENCE LA English DT Article ID ELECTRON SPECTROSCOPY; SUBSTRATE-DIFFUSION; COPPER; SURFACE; BISMUTH; MODES; LEED; DEPOSITION; CU(110); AG AB The growth of reactive adatom-substrate overlayers has been examined during the deposition of Ag and Cu on Bi(0001) using primarily Auger electron spectroscopy (AES) and low-energy electron diffraction (LEED). When viewed by the commonly used signal-versus-time plot, the Auger data exhibit a featureless behavior with a temperature dependence that is suggestive of cluster or compound formation. Surprisingly, when the same data are portrayed on a substrate-versus-adatom plot of the signals, the results are quite unlike those previously reported in the literature, in that the curvature of the data is the opposite of that typically found as the adatom signal increases. Heavy adatom deposition is needed to totally obscure the substrate signal. In the absence of factors that are known to affect the Auger yield in such overlayer systems, these data are found to be consistent with a growth process in which a layer of Bi substrate atoms is continuously segregated at the vacuum solid interface. This interpretation is consistent with predictions from surface free-energy arguments, in that the Bi has a much lower energy than Ag or Cu and, thus, has a strong tendency to stay on top of the growing film. C1 UNIV WASHINGTON,DEPT CHEM,SEATTLE,WA 98195. RP TAYLOR, TN (reprint author), LOS ALAMOS NATL LAB,DIV CHEM & LASER SCI,LOS ALAMOS,NM 87545, USA. NR 26 TC 2 Z9 2 U1 1 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 JAN 10 PY 1993 VL 280 IS 3 BP 277 EP 288 DI 10.1016/0039-6028(93)90681-9 PG 12 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA KG609 UT WOS:A1993KG60900007 ER PT J AU WILK, DE STANNERS, CD SHEN, YR SOMORJAI, GA AF WILK, DE STANNERS, CD SHEN, YR SOMORJAI, GA TI STRUCTURE AND THERMAL-DECOMPOSITION OF PARA-XYLENE AND ORTHO-XYLENE ON PT(111) - A HREELS, LEED AND TPD STUDY SO SURFACE SCIENCE LA English DT Article ID ENERGY LOSS SPECTROSCOPY; COORDINATION CHEMISTRY; BENZENE; SURFACES; CHEMISORPTION; DESORPTION; TOLUENE; MODELS AB High resolution electron energy loss spectroscopy (HREELS), thermal desorption spectroscopy and low energy electron diffraction (LEED) were used to investigate the low temperature adsorption structure and subsequent thermal decomposition of p- and o-xylene on Pt(111). Both xylenes adsorb intact on Pt(111) at 245 K with the aromatic ring oriented parallel to the surface. At about 350 K. both p- and o-xylene begin thermal decomposition by partial dehydrogenation of the methyl groups. Further decomposition pathways are markedly different for the two xylenes. For p-xylene, the remaining aliphatic and aromatic CH bonds break at about 550 K, leaving CH and C2H species on the surface. In contrast, the aliphatic groups of o-xylene completely dehydrogenate at about 440 K, leaving a fragment with the aromatic ring oriented nearly perpendicular to the surface. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. RP WILK, DE (reprint author), LAWRENCE BERKELEY LAB,DEPT PHYS,DIV MAT SCI,BERKELEY,CA 94720, USA. NR 20 TC 25 Z9 25 U1 2 U2 13 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD JAN 10 PY 1993 VL 280 IS 3 BP 298 EP 312 DI 10.1016/0039-6028(93)90683-B PG 15 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA KG609 UT WOS:A1993KG60900009 ER PT J AU DUNPHY, JC KNIGHT, C SAUTET, P OGLETREE, DF SOMORJAI, GA SALMERON, MB AF DUNPHY, JC KNIGHT, C SAUTET, P OGLETREE, DF SOMORJAI, GA SALMERON, MB TI THE INFLUENCE OF SULFUR ADSORPTION ON THE STEP STRUCTURE OF VICINAL MO(100) - A LEED AND STM STUDY SO SURFACE SCIENCE LA English DT Article ID SINGLE-CRYSTAL SURFACES; INDUCED RECONSTRUCTION; OXYGEN; SCIENCE; VACUUM; FACE AB The effect of sulfur adsorption on the step structure of vicinal Mo(100) surfaces has been studied with scanning tunneling microscopy (STM) and low energy electron diffraction (LEED). STM was used for low densities of steps on a nominally flat (100) surface. LEED was used to study the more highly and regularly stepped (910), (911), and (28,4,1) oriented surfaces. Steps and the sulfur adsorbate were found to have a strong interaction. The presence and orientation of steps on the surface governed the formation of ordered domains of sulfur, and sulfur modified the structure of the steps on the surface. Both techniques show that monatomic steps predominate on the clean surfaces. When sulfur was adsorbed on the surfaces, however, steps coalesced to form groups of steps, double atomic height steps, and multiple height steps, depending on sulfur coverage and initial step density. The results are discussed in the framework of the theory of equilibrium crystal shape and provide information on how the Mo step-step interactions are affected by sulfur adsorption. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. ENS LYON,CHIM THEOR LAB,F-69464 LYON 07,FRANCE. INST RECH CATALYSE,F-69626 VILLEURBANNE,FRANCE. RP DUNPHY, JC (reprint author), LAWRENCE BERKELEY LAB,DIV MAT SCI,CTR ADV MAT,BERKELEY,CA 94720, USA. RI Sautet, Philippe/G-3710-2014; Ogletree, D Frank/D-9833-2016 OI Sautet, Philippe/0000-0002-8444-3348; Ogletree, D Frank/0000-0002-8159-0182 NR 30 TC 23 Z9 23 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD JAN 10 PY 1993 VL 280 IS 3 BP 313 EP 324 DI 10.1016/0039-6028(93)90684-C PG 12 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA KG609 UT WOS:A1993KG60900010 ER PT J AU BURNS, AR AF BURNS, AR TI QUANTUM-RESOLVED ANGULAR-DISTRIBUTIONS OF NEUTRAL PRODUCTS IN ELECTRON-STIMULATED PROCESSES - DESORPTION OF CO-ASTERISK FROM PT(111) SO SURFACE SCIENCE LA English DT Article ID CARBON-MONOXIDE; DIGITAL ESDIAD; SURFACES; ION; STATE; ENHANCEMENT; IONIZATION; SCATTERING; OXYGEN; NO AB The first quantum-resolved angular distribution measurements of electronically excited neutral molecules which have undergone electron stimulated desorption (ESD) are presented. Two-dimensional imaging of laser resonance-enhanced multiphoton ionization (REMPI) is used to obtain angular distributions of CO* in the nu = 0 vibrational level of the metastable a3PI(r), state desorbed from CO/Pt(111) by 350 eV electrons. For saturation CO coverages at 90 K, sharp Gaussian distributions peaked about the surface normal (6-degrees +/- 0.5-degrees half-width at half maximum) are observed, consistent with previously reported data acquired by ESDIAD (ESD ion angular distributions). The (1 + 1) photon REMPI scheme for state-specific CO* detection involves the b3SIGMA(nu = 0) <-- a3PI(nu = 0) transition at 283 nm, followed by photoionization al the same wavelength. In this paper, the overall experimental technique for REMPI imaging of products from electron stimulated processes is discussed. Thus specific CO* data as a function of coverage and temperature is presented for comparison with the ESDIAD results. RP BURNS, AR (reprint author), SANDIA NATL LABS,DEPT 1114,ALBUQUERQUE,NM 87185, USA. NR 38 TC 11 Z9 11 U1 2 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD JAN 10 PY 1993 VL 280 IS 3 BP 349 EP 358 DI 10.1016/0039-6028(93)90687-F PG 10 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA KG609 UT WOS:A1993KG60900013 ER PT J AU BURNS, AR STECHEL, EB JENNISON, DR AF BURNS, AR STECHEL, EB JENNISON, DR TI QUANTUM-RESOLVED ANGULAR-DISTRIBUTIONS OF NEUTRAL PRODUCTS IN ELECTRON-STIMULATED PROCESSES - NO DESORPTION FROM AND NO-2 DISSOCIATION ON PT(111) SO SURFACE SCIENCE LA English DT Article ID NITROGEN-DIOXIDE; HIGH COVERAGES; SURFACE; OXYGEN; ION; ESDIAD; CO; SCATTERING; COADSORPTION; DYNAMICS AB We present the first quantum-resolved angular distributions of ground-state neutral molecules which are products of electron stimulated desorption (ESD) and electron stimulated dissociation. Laser resonance-enhanced multiphoton ionization (REMPI) and two-dimensional imaging have been used to obtain angular distributions of NO desorbed by 350 eV electrons from O-precovered Pt(111). In a similar fashion, we have measured angular distributions for the NO product of NO2 dissociation on clean and O-precovered Pt(111). In all cases, we observe narrow widths which are roughly the same as ion distributions determined by ESDIAD (ESD ion angular distributions). The angular distribution for NO ESD is sharply peaked (7-degrees half-width at half maximum) along the surface normal for an O coverage (theta(O)) of 0.25 monolayer (ML). The angular distribution of the NO product from dissociation of side-bonded NO, on clean Pt(111) is unexpectedly peaked about the surface normal, and thus does not reflect dissociative forces parallel to the surface or the approximately 25-degrees off-normal ground-state bond direction. On O-precovered Pt(111), where NO2 is N-bonded, approximately 6-degrees off-normal beams are observed. When the substrate is precovered with theta(O) > 0.5 ML, local disorder creates asymmetric site geometries which result in multiple peaked angular distributions with both normal and off-normal (approximately 9-10-degrees) components; similar effects for NO ESD are observed. In all these studies, the NO angular distributions are invariant to rotational or vibrational state. This implies that the lateral translational degrees of freedom are essentially de-coupled from the internal modes of the molecule. The results are discussed in terms of desorption mechanisms, dissociative forces, site geometries, and disordered coadsorbate layers. RP BURNS, AR (reprint author), SANDIA NATL LABS,DEPT 1114,ALBUQUERQUE,NM 87185, USA. RI Stechel, Ellen/B-1253-2012 NR 35 TC 12 Z9 12 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 JAN 10 PY 1993 VL 280 IS 3 BP 359 EP 368 DI 10.1016/0039-6028(93)90688-G PG 10 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA KG609 UT WOS:A1993KG60900014 ER PT J AU CHAPPLE, CCS REITER, WD SOMERVILLE, CR AF CHAPPLE, CCS REITER, WD SOMERVILLE, CR TI THE USE OF MUTANTS TO DISSECT THE STRUCTURE AND FUNCTION OF THE CELL-WALL SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 MICHIGAN STATE UNIV,DOE,PLANT RES LAB,E LANSING,MI 48824. NR 0 TC 1 Z9 1 U1 0 U2 2 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD JAN 9 PY 1993 SU 17A BP 7 EP 7 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN464 UT WOS:A1993KN46400017 ER PT J AU JACKSON, PJ KE, HYD BIRNBAUM, ER DARNALL, DW KUSKE, CR RAYSON, GD AF JACKSON, PJ KE, HYD BIRNBAUM, ER DARNALL, DW KUSKE, CR RAYSON, GD TI CHELATION OF METAL-IONS BY DIFFERENT COMPONENTS OF THE PLANT-CELL WALL SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. NEW MEXICO STATE UNIV,DEPT CHEM,LAS CRUCES,NM 88003. NR 0 TC 0 Z9 0 U1 1 U2 1 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD JAN 9 PY 1993 SU 17A BP 29 EP 29 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN464 UT WOS:A1993KN46400095 ER PT J AU LINDEN, JC SAMARA, M PECS, M THOMAS, E JOY, M GRIESHABER, S ADNEY, W HIMMEL, M AF LINDEN, JC SAMARA, M PECS, M THOMAS, E JOY, M GRIESHABER, S ADNEY, W HIMMEL, M TI PURIFICATION AND CHARACTERIZATION OF ACETYLESTERASE XYLANESTERASE FROM ASPERGILLUS-NIGER SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 COLORADO STATE UNIV,DEPT MICROBIOL,FT COLLINS,CO 80523. NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. RI Pecs, Miklos/H-9931-2012 NR 0 TC 0 Z9 0 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 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD JAN 9 PY 1993 SU 17A BP 29 EP 29 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN464 UT WOS:A1993KN46400097 ER PT J AU REITER, WD CHAPPLE, C SOMERVILLE, C AF REITER, WD CHAPPLE, C SOMERVILLE, C TI CELL-WALL MUTANTS OF ARABIDOPSIS SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 MSU,DOE,PLANT RES LAB,E LANSING,MI 48824. NR 0 TC 0 Z9 0 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 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD JAN 9 PY 1993 SU 17A BP 34 EP 34 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN464 UT WOS:A1993KN46400118 ER PT J AU RUNNELS, B SMYTH, M WHARTON, W AF RUNNELS, B SMYTH, M WHARTON, W TI CHOLERA-TOXIN POTENTIATES TPA-DRIVEN MITOGENIC RESPONSES AND C-FOS INDUCTION SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. UNIV NEW MEXICO,DEPT PATHOL,ALBUQUERQUE,NM 87131. NR 0 TC 0 Z9 0 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 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD JAN 9 PY 1993 SU 17A BP 139 EP 139 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN464 UT WOS:A1993KN46400505 ER PT J AU CASPERSON, GF SCHMIDHAUSER, C MYERS, CA SANZO, KT BOLTEN, S BISSELL, MJ AF CASPERSON, GF SCHMIDHAUSER, C MYERS, CA SANZO, KT BOLTEN, S BISSELL, MJ TI A NOVEL TRANSCRIPTIONAL ENHANCER IS INVOLVED IN THE PROLACTIN AND EXTRACELLULAR MATRIX-DEPENDENT REGULATION OF BETA-CASEIN GENE-EXPRESSION SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 U CALIF BERKLEY,LAWRENCE BERKELEY LAB,DIV CELL & MOLEC BIOL,BERKELEY,CA 94720. MONSATO CORP RES,CHESTERFIELD,MO 63198. NR 0 TC 0 Z9 0 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 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD JAN 9 PY 1993 SU 17A BP 190 EP 190 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN464 UT WOS:A1993KN46400706 ER PT J AU DELATTRE, O ZUCMAN, J PLOUGASTEL, B DESMAZE, C MELOT, T PETER, M DEJONG, P AURIAS, A THOMAS, G AF DELATTRE, O ZUCMAN, J PLOUGASTEL, B DESMAZE, C MELOT, T PETER, M DEJONG, P AURIAS, A THOMAS, G TI GENE FUSION WITH AN ETS DOMAIN CAUSED BY CHROMOSOME-TRANSLOCATION IN HUMAN TUMORS SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 I CURIE,PARIS,FRANCE. LLNL,LIVERMORE,CA. NR 0 TC 0 Z9 0 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 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD JAN 9 PY 1993 SU 17A BP 214 EP 214 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN464 UT WOS:A1993KN46400801 ER PT J AU KRAEMER, PM BRADBURY, EM AF KRAEMER, PM BRADBURY, EM TI ABROGATION OF A KINASE MEDIATED G1-CELL CYCLE ARREST POINT IS A LATE EVENT IN THE NEOPLASTIC PROGRESSION OF HUMAN FIBROBLASTS TRANSFECTED WITH THE SV40 LARGE T-ANTIGEN GENE SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 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 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD JAN 9 PY 1993 SU 17A BP 294 EP 294 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN464 UT WOS:A1993KN46401102 ER PT J AU NAGY, JO SPEVAK, W CHARYCH, DH SCHAEFER, ME GILBERT, JH BEDNARSKI, MD AF NAGY, JO SPEVAK, W CHARYCH, DH SCHAEFER, ME GILBERT, JH BEDNARSKI, MD TI POLYMERIZED LIPOSOMES CONTAINING C-GLYCOSIDES OF SIALIC-ACID ARE POTENT INHIBITORS OF INFLUENZA-VIRUS HEMAGGLUTINATION AND INVITRO INFECTIVITY SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720. GLYCOMED INC,DEPT MICROBIOL & IMMUNOL,ALAMEDA,CA 94501. NR 0 TC 0 Z9 1 U1 0 U2 1 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD JAN 9 PY 1993 SU 17A BP 382 EP 382 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN464 UT WOS:A1993KN46401413 ER PT J AU HAMZA, AV BALOOCH, M AF HAMZA, AV BALOOCH, M TI THE CHEMISORPTION OF C-60 ON SI(100)-(2X1) SO CHEMICAL PHYSICS LETTERS LA English DT Article AB The adsorption of C60 on Si(100)-(2 X 1) has been investigated by temperature-programmed desorption (TPD) spectroscopy and Auger electron spectroscopy (AES). The binding of the first monolayer of C60 to the clean (2 X 1) silicon (100) is strong; such that the carbon overlayer is not removed until the substrate is heated to over 1150 K. After desorption of the multilayer peak by heating to 600 K, a graphite-like carbon AES peak is observed. Heating of the C60 monolayer between 900 and 1150 K causes the carbon AES peak shape to change and the ratio of the carbon peak height to the silicon peak height to increase, indicating a change in the structure of the film. The lower bound for the strength of the C60 to Si(100)-(2 X 1) bond is estimated to be 56 kcal/mol and the C60 molecule dissociates before this bond is thermally activated. This result offers an explanation of the recent enhanced nucleation of diamond by C60 and C70 on Si(100). RP HAMZA, AV (reprint author), LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94551, USA. NR 10 TC 58 Z9 58 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD JAN 8 PY 1993 VL 201 IS 5-6 BP 404 EP 408 DI 10.1016/0009-2614(93)85092-3 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KF754 UT WOS:A1993KF75400003 ER PT J AU DU, M XIE, XL JIA, YW METS, L FLEMING, GR AF DU, M XIE, XL JIA, YW METS, L FLEMING, GR TI DIRECT OBSERVATION OF ULTRAFAST ENERGY-TRANSFER IN PSI CORE ANTENNA SO CHEMICAL PHYSICS LETTERS LA English DT Article ID TIME-RESOLVED FLUORESCENCE; PUMP-PROBE SPECTROSCOPY; PHOTOSYSTEM-I; EXCITATION TRANSPORT; TRANSFER RATES; ABSORPTION; DEPOLARIZATION; ANISOTROPY; DICHROISM; COMPLEX AB A femtosecond fluorescence upconversion apparatus was used to measure the fluorescence decay in the PSI core antenna of a PSI-only mutant of Chlamydomonas reinhardtii. The fluorescence depolarization measurements reveal a fast depolarization with a time constant in the range of 150-300 fs irrespective of the excitation and/or detection wavelengths. We associate this time with the energy transfer timescale. The isotropic fluorescence decay shows a decay component of almost-equal-to 5 ps and is suggested to result from spectral equilibration within the antenna. C1 PACIFIC NW LAB, RES CTR, RICHLAND, WA 99352 USA. UNIV CHICAGO, JAMES FRANCK INST, CHICAGO, IL 60637 USA. UNIV CHICAGO, DEPT MOLEC GENET & CELL BIOL, CHICAGO, IL 60637 USA. RP DU, M (reprint author), UNIV CHICAGO, DEPT CHEM, 5735 S ELLIS AVE, CHICAGO, IL 60637 USA. NR 39 TC 73 Z9 76 U1 1 U2 8 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 JAN 8 PY 1993 VL 201 IS 5-6 BP 535 EP 542 DI 10.1016/0009-2614(93)85113-3 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KF754 UT WOS:A1993KF75400024 ER PT J AU BLACK, B MAJER, G PINES, A AF BLACK, B MAJER, G PINES, A TI SQUID-NMR STUDY OF METHYL QUANTUM TUNNELING IN A SERIES OF CARBOXYLIC-ACIDS SO CHEMICAL PHYSICS LETTERS LA English DT Article ID MAGNETIC-RESONANCE; NUCLEAR AB Quantum tunneling frequencies of methyl groups at low temperature can be measured directly by low-field nuclear magnetic resonance (NMR) using our dc-SQUID (superconducting quantum interference device) spectrometer. From NMR spectra recorded in magnetic fields below 20 mT, tunneling frequencies between 140 and 250 kHz were measured for a homologous series of carboxylic acids at 4.2 K. For solids with equivalent crystal structures, we observe an exponential correlation between the tunneling frequency and the enthalpy of fusion; from this correlation we obtain information about the contribution of intermolecular interactions to the energy barrier for methyl rotation. C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP BLACK, B (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. NR 23 TC 14 Z9 14 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD JAN 8 PY 1993 VL 201 IS 5-6 BP 550 EP 554 DI 10.1016/0009-2614(93)85115-5 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KF754 UT WOS:A1993KF75400026 ER PT J AU XANTHEAS, SS DUNNING, TH AF XANTHEAS, SS DUNNING, TH TI THEORETICAL ESTIMATE OF THE ENTHALPY OF FORMATION OF HSO AND THE HSO SOH ISOMERIZATION ENERGY SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Letter ID NO2; KINETICS; HYDROGEN; ATOMS; O-2; HOS AB The enthalpy of formation of HSO is estimated to be -5.4 +/- 1.3 kcal/mol through a series of multireference configuration interaction (MR-CI) calculations that systematically expand the orbital basis set. The estimated value of DELTAH(f)degrees suggests that HSO may well be involved in a catalytic cycle that depletes ozone in the atmosphere. In contrast to all earlier theoretical studies, the computed energy difference between the HSO and SOH isomers is estimated to be 5.4 kcal/mol, with the HSO isomer being more stable. RP XANTHEAS, SS (reprint author), PACIFIC NW LAB, THEORY MODELING & SIMULAT MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. RI Xantheas, Sotiris/L-1239-2015; OI Xantheas, Sotiris/0000-0002-6303-1037 NR 27 TC 136 Z9 136 U1 0 U2 4 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 JAN 7 PY 1993 VL 97 IS 1 BP 18 EP 19 DI 10.1021/j100103a005 PG 2 WC Chemistry, Physical SC Chemistry GA KG898 UT WOS:A1993KG89800005 ER PT J AU CREAGH, SC AF CREAGH, SC TI SEMICLASSICAL MECHANICS OF SYMMETRY REDUCTION SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article ID TRACE FORMULA; MASLOV INDEXES; BOUND SPECTRUM; WAVE-EQUATION; FINITE DOMAIN; EIGENFREQUENCIES; DENSITY; ORBITS AB We discuss semiclassical approximations that are adapted to given symmetry classes in quantum mechanics. Arbitrary Abelian symmetries and also rotational symmetry are treated. Semiclassical approximations are derived for the projected propagator and energy dependent Green's function associated with a given irreducible representation of the symmetry group. From these we derive trace formulae, analogous to the usual trace formula, that determine the energy levels in a given symmetry class in terms of classical orbits. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 27 TC 20 Z9 20 U1 0 U2 1 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 JAN 7 PY 1993 VL 26 IS 1 BP 95 EP 118 DI 10.1088/0305-4470/26/1/013 PG 24 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA KH877 UT WOS:A1993KH87700013 ER PT J AU XIANG, XD HOU, JG CRESPI, VH ZETTL, A COHEN, ML AF XIANG, XD HOU, JG CRESPI, VH ZETTL, A COHEN, ML TI 3-DIMENSIONAL FLUCTUATION CONDUCTIVITY IN SUPERCONDUCTING SINGLE-CRYSTAL K3C60 AND RB3C60 SO NATURE LA English DT Article ID HIGH-TC SUPERCONDUCTORS; FILMS AB THE superconducting transition temperature, T(c), defines the point at which the free energies of the superconducting and normal states of a material become equal. Just above T(c), thermodynamic fluctuations produce small, transient regions of the superconducting state, giving rise to an anomalous increase in the normal-state conductivity known as paraconductivity. This situation is analogous to the fluctuating regions of correlated spins found near the Curie-Weiss transition in ferromagnets. Such, fluctuations are of theoretical significance in that they provide a direct probe of critical phenomena in general, and a stringent test of scaling theories, which describe the approach to the critical point. Paraconductivity effects are strongly dependent on the dimensionality of the system, although for conventional superconductors, three-dimensional fluctuation conductivity has to our knowledge never been observed. Here we report the observation of pure, three-dimensional paraconductivity in single crystals of the recently discovered1 superconductors K3C60 and Rb3C60. In addition to probing the critical state near T(c), these measurements allow the indirect determination of the residual, normal-state resistivity. C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP XIANG, XD (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. RI Hou, Jianguo/G-5076-2010; Xiang, Xiaodong/A-9445-2012; Zettl, Alex/O-4925-2016; Xiang, Xiaodong/A-5936-2017; OI Zettl, Alex/0000-0001-6330-136X; Crespi, Vincent/0000-0003-3846-3193 NR 17 TC 57 Z9 57 U1 2 U2 11 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD JAN 7 PY 1993 VL 361 IS 6407 BP 54 EP 56 DI 10.1038/361054a0 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KF718 UT WOS:A1993KF71800044 ER PT J AU RINCHIK, EM BULTMAN, SJ HORSTHEMKE, B LEE, ST STRUNK, KM SPRITZ, RA AVIDANO, KM JONG, MTC NICHOLLS, RD AF RINCHIK, EM BULTMAN, SJ HORSTHEMKE, B LEE, ST STRUNK, KM SPRITZ, RA AVIDANO, KM JONG, MTC NICHOLLS, RD TI A GENE FOR THE MOUSE PINK-EYED DILUTION LOCUS AND FOR HUMAN TYPE-II OCULOCUTANEOUS ALBINISM SO NATURE LA English DT Article ID PRADER-WILLI SYNDROME; RECEPTOR; PROTEINS AB THE mouse pink-eyed dilution (p) locus on chromosome 7 is associated with defects of skin, eye and coat pigmentation1. Mutations at p cause a reduction of eumelanin (black-brown) pigment and altered morphology of black pigment granules (eumelanosomes), but have little effect on pheomelanin (yellow-red) pigment2. We show here that the human complementary DNA DN10, linked to the p locus in mice3-5, identifies the human homologue (P) of the mouse p gene, and appears to encode an integral membrane transporter protein. The expression pattern of this gene in various p mutant mice correlates with the pigmentation phenotype; moreover, an abnormally sized messenger RNA is detected in one mutant, p(un), which reverts to the normal size in p(un) revertants. The human P gene corresponds to the D15S12 locus within the chromosome segment 15q11-q13, which is typically deleted in patients with Prader-Willi and Angelman syndrome (see ref. 5 for review). These disorders are phenotypically distinct, depending on the parent of origin of the deleted chromosome5-7, but both syndromes are often associated with hypopigmentation of the skin, hair and eyes (see ref. 8 for review), and deletion of the P gene may be responsible for this hypopigmentation. In addition, we report a mutation in both copies of the human P gene in one case of tyrosinase-positive (type II) oculocutaneous albinism, recently linked to 15q11-q13 (ref. 9). C1 UNIV FLORIDA,COLL MED,DEPT NEUROSCI,BOX 100244 JHMHC,GAINESVILLE,FL 32610. OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. UNIV TENNESSEE,OAK RIDGE NATL LAB,OAK RIDGE GRAD SCH BIOMED SCI,OAK RIDGE,TN 37831. UNIV ESSEN GESAMTHSCH KLINIKUM,INST HUMANGENET,W-4300 ESSEN 1,GERMANY. UNIV WISCONSIN,DEPT MED GENET,MADISON,WI 53706. OI Lee, Seung-Taek/0000-0001-7300-9784 NR 32 TC 291 Z9 296 U1 1 U2 13 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD JAN 7 PY 1993 VL 361 IS 6407 BP 72 EP 76 DI 10.1038/361072a0 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KF718 UT WOS:A1993KF71800051 PM 8421497 ER PT J AU WINCKELMANN, LA STOCKER, H GREINER, W SORGE, H AF WINCKELMANN, LA STOCKER, H GREINER, W SORGE, H TI DIELECTRON PRODUCTION IN PP AND PA COLLISIONS AT 4.9 GEV SO PHYSICS LETTERS B LA English DT Article ID NUCLEON NUCLEON COLLISIONS; DILEPTON PRODUCTION; E+E PRODUCTION; BE COLLISIONS; DYNAMICS; MATTER AB A covariant phase space approach (RQMD) is used to predict dielectron mass spectra for interactions of proton on proton and proton on deuteron at 4.9 GeV incident energy. Dalitz decays of eta's dominate the dilepton mass spectra above the pi0 mass up to 0. 5 GeV while decays of vector mesons produce a peak around the rho0 mass. pn bremsstrahlung is strongly reduced at these masses. This is due to the forward peak in the differential elastic cross section dsigma/dt at energies above E(kin) almost-equal-to 1 GeV, as compared to previous calculations. The results for p + Be at 4.9 GeV compare well with available DLS-data. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP WINCKELMANN, LA (reprint author), JWG UNIV,INST THEORET PHYS,W-6000 FRANKFURT,GERMANY. RI Stoecker, Horst/D-6173-2013 OI Stoecker, Horst/0000-0002-3282-3664 NR 26 TC 14 Z9 14 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD JAN 7 PY 1993 VL 298 IS 1-2 BP 22 EP 26 DI 10.1016/0370-2693(93)91699-N PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KH281 UT WOS:A1993KH28100005 ER PT J AU HE, YD PRICE, PB AF HE, YD PRICE, PB TI MEASUREMENT OF CROSS-SECTION FOR CHARGE PICKUP BY 11.4A GEV GOLD IONS SO PHYSICS LETTERS B LA English DT Article ID RELATIVISTIC HOLMIUM IONS; EXCHANGE REACTIONS; DELTA-RESONANCE; HEAVY TARGETS; NUCLEI; COLLISIONS; FRAGMENTS AB We have studied nuclear charge pickup by relativistic gold ions with an energy of 11.4 A GeV in various targets at the Brookhaven AGS. The cross section is similar to that previously measured at approximately 1 A GeV. The dependence of cross section on target mass follows A(T)0.37, while that on projectile mass is much steeper than linear and not inconsistent with the A(p)2 dependence established at approximately 1 A GeV. C1 LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. RP HE, YD (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 14 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 JAN 7 PY 1993 VL 298 IS 1-2 BP 50 EP 53 DI 10.1016/0370-2693(93)91705-R PG 4 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KH281 UT WOS:A1993KH28100011 ER PT J AU BRODSKY, SJ HOYER, P AF BRODSKY, SJ HOYER, P TI A BOUND ON THE ENERGY-LOSS OF PARTONS IN NUCLEI SO PHYSICS LETTERS B LA English DT Article ID J/PSI-PRODUCTION; COLOR TRANSPARENCY; DEPENDENCE; QCD; COLLISIONS; CHARM AB We derive a quantum mechanical upper bound on the amount of radiative energy loss suffered by high energy quarks and gluons in nuclear matter. The bound shows that the nuclear suppression observed in quarkonium production at high x(F) cannot be explained in terms of energy loss of the initial or final parton states. We also argue that no nuclear suppression is expected in the photoproduction of light hadrons at large x(F). C1 UNIV HELSINKI, DEPT PHYS, SF-00170 HELSINKI 17, FINLAND. RP STANFORD UNIV, STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94309 USA. NR 40 TC 89 Z9 92 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD JAN 7 PY 1993 VL 298 IS 1-2 BP 165 EP 170 DI 10.1016/0370-2693(93)91724-2 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KH281 UT WOS:A1993KH28100030 ER PT J AU OHNEMUS, J STIRLING, WJ AF OHNEMUS, J STIRLING, WJ TI BREMSSTRAHLUNG CONTRIBUTIONS TO HADRONIC W+/-GAMMA AND Z-GAMMA PRODUCTION SO PHYSICS LETTERS B LA English DT Article ID PROMPT-PHOTON PRODUCTION; GAUGE-THEORY; COLLISIONS; ZEROS; QCD; AMPLITUDES; COLLIDERS; PAIRS; PP AB Photon bremsstrahlung contributions to hadronic W +/- gamma and Zgamma production are calculated using the leading-logarithm fragmentation function approach. These contributions arise from subprocesses such as qg-->Vq (V = W +/- or Z) followed by photon bremsstrahlung from the final state quark. The bremsstrahlung processes are backgrounds to the Born processes qqBAR-->Vgamma which are important for testing the standard model. The bremsstrahlung contributions are significant at LHC/SSC energies, however, they can be suppressed to a manageable level by imposing isolation cuts on the photon. C1 UNIV DURHAM,DEPT PHYS,DURHAM DH1 3LE,ENGLAND. RP OHNEMUS, J (reprint author), ARGONNE NATL LAB,DIV HIGH ENERGY PHYS,ARGONNE,IL 60439, USA. NR 31 TC 7 Z9 7 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 JAN 7 PY 1993 VL 298 IS 1-2 BP 230 EP 235 DI 10.1016/0370-2693(93)91735-6 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KH281 UT WOS:A1993KH28100041 ER PT J AU ABREU, P ADAM, W ADYE, T AGASI, E ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARKER, G BARONCELLI, A BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV 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, R CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHAPKIN, M CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J DASILVA, W DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DEANGELIS, A 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 DUPONT, F EEK, LO EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B 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 HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL 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 HUET, K HULTH, PO HULTQVIST, K 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 KARVELAS, E 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 KORCYL, K KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U KUCEWICZ, W KULKA, K 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 LESIAK, T LEVY, JM LIEB, E LIKO, D LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D 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 MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MYATT, G NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PASSERI, A PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PETTERSEN, TE PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H 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, S ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHULZE, B SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN SKJEVLING, G SMADJA, G SMIRNOV, N SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOMARADZE, A TORASSA, E TORTORA, L TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN 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 VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M 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 WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J AF ABREU, P ADAM, W ADYE, T AGASI, E ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARKER, G BARONCELLI, A BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV 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, R CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHAPKIN, M CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J DASILVA, W DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DEANGELIS, A 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 DUPONT, F EEK, LO EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B 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 HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL 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 HUET, K HULTH, PO HULTQVIST, K 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 KARVELAS, E 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 KORCYL, K KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U KUCEWICZ, W KULKA, K 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 LESIAK, T LEVY, JM LIEB, E LIKO, D LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D 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 MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MYATT, G NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PASSERI, A PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PETTERSEN, TE PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H 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, S ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHULZE, B SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN SKJEVLING, G SMADJA, G SMIRNOV, N SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOMARADZE, A TORASSA, E TORTORA, L TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN 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 VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M 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 WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J TI MEASUREMENT OF INCLUSIVE PRODUCTION OF LIGHT MESON RESONANCES IN HADRONIC DECAYS OF THE Z0 SO PHYSICS LETTERS B LA English DT Article ID LUND MONTE-CARLO; E+E-ANNIHILATION; K+P INTERACTIONS; JET FRAGMENTATION; PHYSICS; GEV/C; RHO0 AB A study of inclusive production of the meson resonances rho0, K*0 (892), f0(975) and f2(1270) in hadronic decays of the Z0 is presented. The measured mean meson multiplicity per hadronic event is 0.83 +/- 0.14 for the rho0, 0.64 +/- 0.24 for the K*0(892). 0.10 +/- 0.04 for the f0(975) in the momentum range p > 0.05p(beam) (x(p) > 0.05) and 0.11 +/- 0.05 for the f2 (1270) for x(p) > 0. 1. These values and the corresponding differential cross sections (1/sigma(hadr)) dsigma/dx(p) for the vector mesons are in good agreement with the predictions of the JETSET 7.3 PS and HFRWIG 5.4 models. The f2 (1270) production is overestimated by HERWIG but its x(p)-shape is correctly reproduced. The measured ratios of the production cross sections sigma (f2(1270))/sigma(rho0) = 0.22 +/- 0.08 and sigma(f2(1270))/sigma(f0(975)) = 3(-1)+7 for x(p) > 0.1 are consistent with the results obtained in hadronic reactions. C1 AUSTRIAN ACAD SCI,INST HOCHENERGIEPHYS,A-1050 VIENNA,AUSTRIA. NIKHEF H,1009 DB AMSTERDAM,NETHERLANDS. JOINT NUCL RES INST,DUBNA 101000,RUSSIA. SEFT,HIGH ENERGY PHYS RES INST,SF-00170 HELSINKI 17,FINLAND. UNIV VALENCIA,CSIC,IFIC VALENCIA,E-46100 BURJASSOT,SPAIN. UNIV LUND,DEPT PHYS,S-22363 LUND,SWEDEN. UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY. CERN,CH-1211 GENEVA 23,SWITZERLAND. UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE. INFN,I-20133 MILAN,ITALY. UNIV LYON 1,IPNL,IN2P3,CNRS,F-69622 VILLEURBANNE,FRANCE. UNIV GRENOBLE 1,INST SCI NUCL,IN2P3,CNRS,F-38026 GRENOBLE,FRANCE. INFN,I-34127 TRIESTE,ITALY. UNIV OXFORD,NUCL PHYS LAB,OXFORD OX1 3RH,ENGLAND. IST NAZL FIS NUCL,IST SUPER SANITA,I-00161 ROME,ITALY. UNIV COMPLUTENSE,E-28040 MADRID,SPAIN. UNIV PARIS 06,IN2P3,LPNHE,CNRS,F-75252 PARIS 05,FRANCE. PONTIFICIA UNIV CATOLICA,DEPT FIS,BR-22453 RIO JANEIRO,BRAZIL. NCSR DEMOKRITOS,INST NUCL PHYS,GR-15310 ATHENS,GREECE. ULP,CTR RECH NUCL,IN2P3,CNRS,F-67037 STRASBOURG,FRANCE. INFN,I-40126 BOLOGNA,ITALY. VUB,ULB,IIHE,B-1050 BRUSSELS,BELGIUM. INFN,I-10125 TURIN,ITALY. UNIV ROME 2,DIPARTIMENTO FIS,I-00173 ROME,ITALY. CENS,DAPNIA,DSM,F-91191 GIF SUR YVETTE,FRANCE. UNIV GENOA,DIPARTIMENTO FIS,I-16146 GENOA,ITALY. UNIV OSLO,DEPT PHYS,N-1000 OSLO 3,NORWAY. UNIV SANTANDER,FAC CIENCIAS,E-39005 SANTANDER,SPAIN. NIELS BOHR INST,DK-2100 COPENHAGEN 0,DENMARK. INST NUCL STUDIES,PL-00681 WARSAW,POLAND. NATL TECH UNIV ATHENS,DEPT PHYS,GR-15773 ATHENS,GREECE. UNIV AIX MARSEILLE 2,CPP,IN2P3,CNRS,F-13288 MARSEILLE 09,FRANCE. COLL FRANCE,PHYS CORPUSCULAIRE LAB,F-75231 PARIS 05,FRANCE. PROTUINO HIGH ENERGY PHYS INST,PROTUINO 142284,RUSSIA. UNIV BOLOGNA,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY. UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM. UNIV ETAT MONS,FAC SCI,B-7000 MONS,BELGIUM. UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10125 TURIN,ITALY. INFN,I-00173 ROME,ITALY. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,ENGLAND. UNIV LJUBLJANA,J STEFAN INST,YU-61000 LJUBLJANA,SLOVENIA. UNIV LJUBLJANA,DEPT PHYS,YU-61000 LJUBLJANA,SLOVENIA. UNIV UPPSALA,DEPT RADIAT SCI,S-75121 UPPSALA,SWEDEN. INST NUCL PHYS,HIGH ENERGY PHYS LAB,PL-30055 KRAKOW 30,POLAND. CHARLES UNIV,MFF,CTR NUCL,NC,CS-18000 PRAGUE 8,CZECHOSLOVAKIA. CTR BRASILEIRO PESQUISAS,BR-22290 RIO JANEIRO,BRAZIL. INFN,I-16146 GENOA,ITALY. UNIV PADUA,I-35131 PADUA,ITALY. INFN,I-35131 PADUA,ITALY. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. UNIV WARSAW,PL-00681 WARSAW,POLAND. UNIV LANCASTER,SCH PHYS & MAT,LANCASTER LA1 4YB,ENGLAND. CZECHOSLOVAK ACAD SCI,INST PHYS,DIV HIGH ENERGY PHYS,FZU,CS-18040 PRAGUE 8,CZECHOSLOVAKIA. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV VALENCIA,DFAMN,E-46100 BURJASSOT,SPAIN. UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY. 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 TRIESTE,DIPARTIMENTO FIS,I-34127 TRIESTE,ITALY. UNIV TRIESTE,DIPARTIMENTO FIS,I-34127 TRIESTE,ITALY. UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,W-5600 WUPPERTAL 1,GERMANY. UNIV PARIS 07,F-75252 PARIS 05,FRANCE. UNIV UDINE,IST FIS,I-33100 UDINE,ITALY. RP ABREU, P (reprint author), IST,FOUL,LIP,AV ELIAS GARCIA 14-1,P-1000 LISBON,PORTUGAL. RI 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; Schulze, Bruno/B-7599-2008; Petrolini, Alessandro/H-3782-2011; Torassa, Ezio/I-1788-2012; Giacomelli, Paolo/B-8076-2009; Fruhwirth, Rudolf/H-2529-2012; Andreazza, Attilio/E-5642-2011; 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; Vaz, Pedro/K-2464-2013; Monge, Maria Roberta/G-9127-2012; Ridky, Jan/H-6184-2014; Zukanovich Funchal, Renata/C-5829-2013; Fernandez, Ester/K-9734-2014; 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; 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; Barrio, Juan/L-3227-2014; OI Ruiz, Alberto/0000-0002-3639-0368; Shellard, Ronald/0000-0002-2983-1815; Schulze, Bruno/0000-0002-3325-5785; Petrolini, Alessandro/0000-0003-0222-7594; Andreazza, Attilio/0000-0001-5161-5759; Dracos, Marcos/0000-0003-0514-193X; 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; 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; Barrio, Juan/0000-0002-0965-0259; Matteuzzi, Clara/0000-0002-4047-4521; 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 Angelis, Alessandro/0000-0002-3288-2517; De Lotto, Barbara/0000-0003-3624-4480; Tabarelli de Fatis, Tommaso/0000-0001-6262-4685; Torassa, Ezio/0000-0003-2321-0599 NR 29 TC 38 Z9 38 U1 0 U2 9 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 JAN 7 PY 1993 VL 298 IS 1-2 BP 236 EP 246 DI 10.1016/0370-2693(93)91736-7 PG 11 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KH281 UT WOS:A1993KH28100042 ER PT J AU ABREU, P ADAM, W ADYE, T AGASI, E ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARKER, G BARONCELLI, A BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUDINOV, E BOUQUET, B BOURDARIOS, C BOWCOCK, TJV 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, R CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J DASILVA, W DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DERKAOUI, J DEANGELIS, A 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 DUPONT, F EEK, LO EROLA, PAM EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B 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 HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL 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 HUET, K HULTH, PO HULTQVIST, K 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 KARVELAS, E 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 KORCYL, K KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U KUCEWICZ, W KULKA, K 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 LESIAK, T LEVY, JM LIEB, E LIKO, D LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D 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 MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MYATT, G NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PASSERI, A PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PETROVYKH, L PETTERSEN, TE PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H 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, S ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHULZE, B SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TORASSA, E TORTORA, L TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN 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 VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M 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 WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J AF ABREU, P ADAM, W ADYE, T AGASI, E ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P APEL, WD APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARKER, G BARONCELLI, A BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUDINOV, E BOUQUET, B BOURDARIOS, C BOWCOCK, TJV 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, R CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J DASILVA, W DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DERKAOUI, J DEANGELIS, A 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 DUPONT, F EEK, LO EROLA, PAM EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B 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 HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL 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 HUET, K HULTH, PO HULTQVIST, K 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 KARVELAS, E 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 KORCYL, K KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U KUCEWICZ, W KULKA, K 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 LESIAK, T LEVY, JM LIEB, E LIKO, D LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D 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 MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MYATT, G NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PASSERI, A PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PETROVYKH, L PETTERSEN, TE PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H 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, S ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHULZE, B SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TORASSA, E TORTORA, L TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN 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 VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M 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 WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J TI A SEARCH FOR LEPTON FLAVOR VIOLATION IN Z0 DECAYS SO PHYSICS LETTERS B LA English DT Article AB A search for lepton flavour violation through the decays Z0 --> emu, etau and mutau was made with the DELPHI detector at LEP, using a sample corresponding to an integrated luminosity of 11.2 pb-1. The number of candidates was consistent with the estimated background. The upper limit on the branching ratio (at 95% confidence level) for Z0 --> emu was 3.2 x 10(-5), for Z0 --> etau was 10.8 x 10(-5) and for Z0 --> mutau was 13.5 x 10(-5). C1 AUSTRIAN ACAD SCI, INST HOCHENERGIEPHYS, A-1050 VIENNA, AUSTRIA. NIKHEF H, 1009 DB AMSTERDAM, NETHERLANDS. JOINT INST NUCL RES, DUBNA 101000, RUSSIA. SEFT, HIGH ENERGY PHYS RES INST, SF-00170 HELSINKI 17, FINLAND. UNIV VALENCIA, CSIC, IFIC VALENCIA, E-46100 BURJASSOT, SPAIN. UNIV LUND, DEPT PHYS, S-22363 LUND, SWEDEN. UNIV BERGEN, DEPT PHYS, N-5007 BERGEN, NORWAY. UNIV ATHENS, PHYS LAB, GR-10680 ATHENS, GREECE. INFN, I-20133 MILAN, ITALY. UNIV GRENOBLE 1, INST SCI NUCL, IN2P3, CNRS, F-38026 GRENOBLE, FRANCE. INFN, I-34127 TRIESTE, ITALY. UNIV OXFORD, NUCL PHYS LAB, OXFORD OX1 3RH, ENGLAND. IST NAZL FIS NUCL, IST SUPER SANITA, I-00161 ROME, ITALY. UNIV COMPLUTENSE, E-28040 MADRID, SPAIN. UNIV PARIS 06, IN2P3, LPNHE, CNRS, F-75252 PARIS 05, FRANCE. PONTIFICIA UNIV CATOLICA, DEPT FIS, BR-22453 RIO DE JANEIRO, BRAZIL. NCSR DEMOKRITES, INST NUCL PHYS, GR-15310 ATHENS, GREECE. ULP, CTR RECH NUCL, IN2P3, CNRS, F-67037 STRASBOURG, FRANCE. INFN, I-40126 BOLOGNA, ITALY. VUB, ULB, IIHE, B-1050 BRUSSELS, BELGIUM. INFN, I-10125 TURIN, ITALY. UNIV ROME 2, DIPARTIMENTO FIS, I-00173 ROME, ITALY. UNIV GENOA, DIPARTIMENTO FIS, I-16146 GENOA, ITALY. UNIV OSLO, DEPT PHYS, N-1000 OSLO 3, NORWAY. UNIV SANTANDER, FAC CIENCIAS, E-39005 SANTANDER, SPAIN. NIELS BOHR INST, DK-2100 COPENHAGEN 0, DENMARK. INST NUCL STUDIES, PL-00681 WARSAW, POLAND. NATL TECH UNIV ATHENS, DEPT PHYS, GR-15773 ATHENS, GREECE. UNIV AIX MARSEILLE 2, CPP, IN2P3, CNRS, F-13288 MARSEILLE 09, FRANCE. INST NUCL PHYS, HIGH ENERGY PHYS LAB, PL-30055 KRAKOW 30, POLAND. CHARLES UNIV, MFF, CTR NUCL, NC, CS-18000 PRAGUE 8, CZECHOSLOVAKIA. CTR BRASILEIRO PESQUISAS, BR-22290 RIO DE JANEIRO, BRAZIL. RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND. UNIV VALENCIA, DFAMN, E-46100 BURJASSOT, SPAIN. CERN, CH-1211 GENEVA 23, SWITZERLAND. UNIV MILAN, DIPARTIMENTO FIS, I-20133 MILAN, ITALY. UNIV LYON 1, IPNL, IN2P3, CNRS, 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 TRIESTE, DIPARTIMENTO FIS, I-34127 TRIESTE, ITALY. UNIV UDINE, IST FIS, I-33100 UDINE, ITALY. UNIV PARIS 07, F-75252 PARIS 05, FRANCE. UNIV GESAMTHSCH WUPPERTAL, FACHBEREICH PHYS, W-5600 WUPPERTAL 1, GERMANY. COLL FRANCE, PHYS CORPUSCULAIRE LAB, F-75231 PARIS 05, FRANCE. PROTVINO HIGH ENERGY PHYS INST, PROTVINO 142284, RUSSIA. UNIV BOLOGNA, DIPARTIMENTO FIS, I-40126 BOLOGNA, ITALY. UNIV INSTELLING ANTWERP, DEPT PHYS, B-2610 WILRIJK, BELGIUM. UNIV ETAT MONS, FAC SCI, B-7000 MONS, BELGIUM. UNIV TURIN, DIPARTIMENTO FIS SPERIMENTALE, I-10125 TURIN, ITALY. INFN, I-00173 ROME, ITALY. CENS, DAPNIA, DSM, F-91191 GIF SUR YVETTE, FRANCE. UNIV LIVERPOOL, DEPT PHYS, LIVERPOOL L69 3BX, ENGLAND. UNIV LJUBLJANA, J STEFAN INST, YU-61000 LJUBLJANA, SLOVENIA. UNIV LJUBLJANA, DEPT PHYS, YU-61000 LJUBLJANA, SLOVENIA. UNIV UPPSALA, DEPT RADIAT SCI, S-75121 UPPSALA, SWEDEN. UNIV PADUA, DIPARTIMENTO FIS, I-35131 PADUA, ITALY. INFN, I-16146 GENOA, ITALY. INFN, I-35131 PADUA, ITALY. IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT PHYS, AMES, IA 50011 USA. UNIV WARSAW, PL-00681 WARSAW, POLAND. UNIV LANCASTER, SCH PHYS & MAT, LANCASTER LA1 4YB, ENGLAND. CZECHOSLOVAK ACAD SCI, INST PHYS, DIV HIGH ENERGY PHYS, FZU, CS-18040 PRAGUE 8, CZECHOSLOVAKIA. RP ABREU, P (reprint author), IST, FOUL, LIP, AV ELIAS GARCIA 14-1, P-1000 LISBON, PORTUGAL. RI Torassa, Ezio/I-1788-2012; 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; Schulze, Bruno/B-7599-2008; Petrolini, Alessandro/H-3782-2011; Giacomelli, Paolo/B-8076-2009; Fruhwirth, Rudolf/H-2529-2012; Andreazza, Attilio/E-5642-2011; 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; Vaz, Pedro/K-2464-2013; Monge, Maria Roberta/G-9127-2012; Ridky, Jan/H-6184-2014; Zukanovich Funchal, Renata/C-5829-2013; Fernandez, Ester/K-9734-2014; Pimenta, Mario/M-1741-2013; Gomez Cadenas, Juan Jose/L-2003-2014; 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; Ragazzi, Stefano/D-2463-2009; 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; Barao, Fernando/O-2357-2016; Barrio, Juan/L-3227-2014; Zaitsev, Alexandre/B-8989-2017 OI Ruiz, Alberto/0000-0002-3639-0368; Shellard, Ronald/0000-0002-2983-1815; Schulze, Bruno/0000-0002-3325-5785; Petrolini, Alessandro/0000-0003-0222-7594; Andreazza, Attilio/0000-0001-5161-5759; Dracos, Marcos/0000-0003-0514-193X; 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; 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; Ragazzi, Stefano/0000-0001-8219-2074; 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; Barao, Fernando/0000-0002-8346-9941; Barrio, Juan/0000-0002-0965-0259; Zaitsev, Alexandre/0000-0002-4961-8368 NR 17 TC 9 Z9 9 U1 0 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD JAN 7 PY 1993 VL 298 IS 1-2 BP 247 EP 256 DI 10.1016/0370-2693(93)91737-8 PG 10 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KH281 UT WOS:A1993KH28100043 ER PT J AU FELINGER, A GUIOCHON, G AF FELINGER, A GUIOCHON, G TI COMPARISON OF MAXIMUM PRODUCTION-RATES AND OPTIMUM OPERATING DESIGN PARAMETERS IN OVERLOADED ELUTION AND DISPLACEMENT CHROMATOGRAPHY SO BIOTECHNOLOGY AND BIOENGINEERING LA English DT Article DE DISPLACEMENT; ELUTION; OPTIMIZATION; PREPARATIVE CHROMATOGRAPHY; PRODUCTION RATE ID LIQUID-CHROMATOGRAPHY; PREPARATIVE CHROMATOGRAPHY; BAND PROFILES; OPTIMIZATION; ISOTHERM; SIMULATION; PREDICTION; MODELS; COLUMN AB The results of a study of the optimization of the experimental conditions for maximum production rate in overloaded elution and displacement chromatography are discussed. This study is based on the use of the equilibrium-dispersive model of chromatography and the competitive Langmuir isotherms to calculate individual band profiles in the elution and displacement modes, and of a simplex algorithm to optimize the production rate. The operating parameters (sample size, mobile phase velocity, and the displacer concentration in the displacement mode) and the column design parameters (column length and average particle diameter) are optimized simultaneously. Binary mixtures having relative concentrations 3:1 and 1:3, and separation factors of 1.2 to 1.8 are investigated. One of our major results is that, in both modes of chromatography, the maximum production rate is achieved at very low values of the retention factors, k', much lower than those used in current practice. In all cases, unless k' exceeds greatly that optimum value, the production rate is higher in overloaded elution than in displacement chromatography. This is particularly true for the extraction of a minor component, which is eluted second. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV ANALYT CHEM,OAK RIDGE,TN 37830. RI Felinger, Attila/A-1595-2008 OI Felinger, Attila/0000-0001-7130-1968 NR 25 TC 24 Z9 24 U1 0 U2 3 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0006-3592 J9 BIOTECHNOL BIOENG JI Biotechnol. Bioeng. PD JAN 5 PY 1993 VL 41 IS 1 BP 134 EP 147 DI 10.1002/bit.260410118 PG 14 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA KC205 UT WOS:A1993KC20500017 PM 18601255 ER PT J AU HONG, L SCHROTH, GP MATTHEWS, HR YAU, P BRADBURY, EM AF HONG, L SCHROTH, GP MATTHEWS, HR YAU, P BRADBURY, EM TI STUDIES OF THE DNA-BINDING PROPERTIES OF HISTONE H4 AMINO TERMINUS - THERMAL-DENATURATION STUDIES REVEAL THAT ACETYLATION MARKEDLY REDUCES THE BINDING CONSTANT OF THE H4 TAIL TO DNA SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID TRANSCRIPTIONALLY ACTIVE CHROMATIN; LINKING NUMBER CHANGE; SILENT MATING LOCI; NUCLEOSOME; H-4; HYPERACETYLATION; ACTIVATION; REPRESSION; PEPTIDES; NEUTRON AB The effect of acetylation on the DNA binding properties of the rigidly conserved histone H4 amino-terminal tail has been studied in detail using the technique of thermal denaturation. The quantitative DNA-binding parameters for both the non- and fully acetylated H4 amino terminus have been determined from thermal denaturation data for complexes of the peptides bound to mixed sequence 146-base pair DNA. We find that under dilute buffer conditions (5 mM Tris-HCl) the binding constant for the non-acetylated peptide to double-stranded DNA is 5 x 10(11) M-1 and that acetylation of lysine residues in the peptide reduces the binding constant to 1 x 10(5) M-1. The dramatic differences observed in the binding constants for the non- and fully acetylated peptides are probably due to the effect of acetylation on the even distribution of positively charged residues in the H4 amino terminus. In other experiments, the binding of both peptides to a 30-base pair oligonucleotide has been studied in solution with varying concentrations of sodium, magnesium, and phosphate ions. These experiments demonstrate that both magnesium and phosphate ions have strong effects on the binding of the H4 tail to DNA, especially weakening the binding of the acetylated peptide. For instance, the dissociation of the non-acetylated peptide from DNA requires 6 mM magnesium, yet the binding of the acetylated peptide is abolished in only 30 muM magnesium. The modulation of the DNA binding interactions of the H4 amino terminus by physiologically relevant ionic conditions, in addition to the effect of acetylation, can be important in the regulation of chromatin structure and function. C1 UNIV CALIF DAVIS,SCH MED,DEPT BIOL CHEM,DAVIS,CA 95616. OREGON STATE UNIV,DEPT BIOCHEM & BIOPHYS,CORVALLIS,OR 97331. LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. FU NIGMS NIH HHS [GM26901] NR 37 TC 241 Z9 245 U1 0 U2 7 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 JAN 5 PY 1993 VL 268 IS 1 BP 305 EP 314 PG 10 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA KE603 UT WOS:A1993KE60300047 PM 8416938 ER PT J AU HWANG, KY KIM, KK MIN, KS EOM, SH YU, YG KIM, SS SWEET, RM SUH, SW AF HWANG, KY KIM, KK MIN, KS EOM, SH YU, YG KIM, SS SWEET, RM SUH, SW TI CRYSTALLIZATION AND PRELIMINARY-X-RAY CRYSTALLOGRAPHIC ANALYSIS OF PROBABLE AMYLASE PROTEASE INHIBITOR-B FROM RICE SEEDS SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Note DE POSSIBLE AMYLASE PROTEASE INHIBITOR; RICE SEEDS; PHOSPHOLIPID TRANSFER PROTEIN; CRYSTALLIZATION; PRELIMINARY X-RAY ANALYSIS ID AMINO-ACID-SEQUENCE; PHOSPHOLIPID TRANSFER PROTEINS; INDIAN FINGER MILLET; BARLEY; DETECTOR C1 SEOUL NATL UNIV, COLL NAT SCI, DEPT CHEM, SEOUL 151742, SOUTH KOREA. LUCKY R&D CTR, BIOTECHNOL, TAEJON, SOUTH KOREA. BROOKHAVEN NATL LAB, DEPT BIOL, UPTON, NY 11973 USA. RI Suh, Se Won/H-8306-2013 OI Suh, Se Won/0000-0002-1768-4635 NR 19 TC 5 Z9 5 U1 1 U2 1 PU ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD JAN 5 PY 1993 VL 229 IS 1 BP 255 EP 257 DI 10.1006/jmbi.1993.1027 PG 3 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA KG623 UT WOS:A1993KG62300027 PM 8421310 ER PT J AU VAWTER, GA KLEM, JF HADLEY, GR KRAVITZ, SH AF VAWTER, GA KLEM, JF HADLEY, GR KRAVITZ, SH TI HIGHLY ACCURATE ETCHING OF RIDGE-WAVE-GUIDE DIRECTIONAL-COUPLERS USING INSITU REFLECTANCE MONITORING AND PERIODIC MULTILAYERS SO APPLIED PHYSICS LETTERS LA English DT Article AB A novel periodic multilayer structure has been used in conjunction with in situ reflectance monitoring to give +/- 10 nm endpoint detection during reactive-ion-beam etching. The method has been used to fabricate ridge-waveguide directional couplers in GaAs/AlGaAs having coupling lengths within 100 mum of the desired 650 mum value. The added loss due to coupling length error was only 0.3 dB per guide. The method is directly applicable to photonic integrated circuits employing complex optical routing of waveguides, directional couplers and y-junctions where total height of the waveguide plays a key role in performance of the circuit. RP VAWTER, GA (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 8 TC 13 Z9 13 U1 1 U2 3 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 JAN 4 PY 1993 VL 62 IS 1 BP 1 EP 3 DI 10.1063/1.108805 PG 3 WC Physics, Applied SC Physics GA KE896 UT WOS:A1993KE89600001 ER PT J AU RICHARDS, RK HUTCHINSON, DP BENNETT, CA HUNTER, HT MA, CH AF RICHARDS, RK HUTCHINSON, DP BENNETT, CA HUNTER, HT MA, CH TI MEASUREMENT OF CO2-LASER SMALL-ANGLE THOMSON SCATTERING ON A MAGNETICALLY CONFINED PLASMA SO APPLIED PHYSICS LETTERS LA English DT Article ID CO2-LASER SCATTERING; FLUCTUATIONS AB We report the first successful small-angle (less than 1-degrees) Thomson scattering measurement of 10 mum radiation from a magnetically confined toroidal plasma. This represents a proof-of-principle demonstration of a new diagnostic technique for confined deuterium-tritium fusion-product alpha particles in future fusion reactors. This result was achieved by detecting scattered CO2 laser light from the plasma of the ATF torsatron at an angle of 0.86-degrees using a novel heterodyne receiver scheme. A predicted resonance in the scattered power as a function of plasma electron density is clearly resolved in the measurements. RP RICHARDS, RK (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 15 TC 14 Z9 14 U1 0 U2 0 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 JAN 4 PY 1993 VL 62 IS 1 BP 28 EP 30 DI 10.1063/1.108808 PG 3 WC Physics, Applied SC Physics GA KE896 UT WOS:A1993KE89600010 ER PT J AU EBNER, JR THOMPSON, MR AF EBNER, JR THOMPSON, MR TI AN ACTIVE-SITE HYPOTHESIS FOR WELL-CRYSTALLIZED VANADIUM PHOSPHORUS OXIDE CATALYST SYSTEMS SO CATALYSIS TODAY LA English DT Article ID MALEIC-ANHYDRIDE; OXIDATION; PYROPHOSPHATE; SURFACE; BUTANE C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. RP EBNER, JR (reprint author), MONSANTO CO, ST LOUIS, MO 63303 USA. NR 12 TC 100 Z9 101 U1 2 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-5861 J9 CATAL TODAY JI Catal. Today PD JAN 4 PY 1993 VL 16 IS 1 BP 51 EP 60 DI 10.1016/0920-5861(93)85005-K PG 10 WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA KJ234 UT WOS:A1993KJ23400005 ER PT J AU NICKEL, JH MORRIS, DE AGER, JW AF NICKEL, JH MORRIS, DE AGER, JW TI LOCUS OF PAIRING INTERACTION IN YBA2CU3O7 BY SITE-SELECTIVE OXYGEN ISOTOPE SHIFT - O-18 IN CUO2 PLANE LAYERS SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTIVITY; HIGH-TC SUPERCONDUCTORS; RAMAN; CHEMISTRY; MODES AB The oxygen isotope shift of T(c) in YBa2Cu3O7 has been measured for samples containing approximately 95% O-18 in the CuO2 plane [O2,O3] sites and primarily O-16 in the apical [O4] and chain [O1] sites. The T(c) of the site-selectively substituted samples is higher than that of the O-16 control samples by 0.10-0.14 K, in contrast to the decrease in T(c) of 0.20-0.23 K for complete O-18 substitution at all sites. Our results indicate that the phonon-mediated contribution to the pairing mechanism in YBa2Cu3O7 involves the apical [O4] sites, and not just the CuO2 plane [O2,O3] sites. C1 UNIV CALIF BERKELEY,DEPT MAT SCI & ENGN,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720. RP NICKEL, JH (reprint author), MORRIS RES,1918 UNIV AVE,BERKELEY,CA 94704, USA. OI Ager, Joel/0000-0001-9334-9751 NR 32 TC 56 Z9 56 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 4 PY 1993 VL 70 IS 1 BP 81 EP 84 DI 10.1103/PhysRevLett.70.81 PG 4 WC Physics, Multidisciplinary SC Physics GA KE655 UT WOS:A1993KE65500021 ER PT J AU WELLSTOOD, FC FERRARI, MJ KINGSTON, JJ SHAW, TJ CLARKE, J AF WELLSTOOD, FC FERRARI, MJ KINGSTON, JJ SHAW, TJ CLARKE, J TI SQUID MILLIATTOVOLTOMETRY OF YBA2CU3O7-X THIN-FILMS - DISSIPATION IN LOW MAGNETIC-FIELDS SO PHYSICAL REVIEW LETTERS LA English DT Article ID BA-CU-O; HIGH-TEMPERATURE SUPERCONDUCTORS; HIGH-TC SUPERCONDUCTORS; VORTEX-GLASS SUPERCONDUCTIVITY; ACTIVATED FLUX MOTION; MECHANICAL MEASUREMENTS; SINGLE-CRYSTALS; NOISE; ENERGIES; PHASE AB The observation of magnetic flux noise in superconducting thin-film flux transformers of YBa2Cu3O7-x enables us to measure a very small, frequency-dependent resistance R(v)(f) in the films, caused by vortex motion. In static magnetic fields below 10(-6) T and at voltages down to 10(-20) V Hz-1/2 , R(v) is proportional to the frequency f at which the measurement is made, is approximately independent of temperature, and decreases with increasing static current in the transformer. This behavior cannot be explained by certain currently accepted models of dissipation arising from vortex motion, but is consistent with a model in which independent vortices hop between two potential wells in a confined region. C1 AT&T BELL LABS,MURRAY HILL,NJ 07974. UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP WELLSTOOD, FC (reprint author), UNIV MARYLAND,CTR SUPERCONDUCTIV RES,DEPT PHYS,COLL PK,MD 20742, USA. RI Joint Quantum Institute, NIST/UMD/H-4494-2011 NR 33 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 JAN 4 PY 1993 VL 70 IS 1 BP 89 EP 92 DI 10.1103/PhysRevLett.70.89 PG 4 WC Physics, Multidisciplinary SC Physics GA KE655 UT WOS:A1993KE65500023 ER PT J AU BAHADUR, S GONG, D ANDEREGG, JW AF BAHADUR, S GONG, D ANDEREGG, JW TI THE INVESTIGATION OF THE ACTION OF FILLERS BY XPS STUDIES OF THE TRANSFER FILMS OF PEEK AND ITS COMPOSITES CONTAINING CUS AND CUF2 SO WEAR LA English DT Article ID WEAR BEHAVIOR; POLYTETRAFLUOROETHYLENE; PYRITE AB ne wear behavior of polyetheretherketone (PEEK) and CuS-PEEK composite rubbing at 1 m s-1 speed and 19.6 N load against both the steel and glass disks is examined. While CuS filler decreased considerably the wear rate of PEEK in rubbing against the steel disk, the wear rate of both the filled and unfilled materials in rubbing against the glass disk was almost the same. The wear rate of CuF2-PEEK composite sliding against a steel surface was also considerably lower than that of PEEK. The transfer films of the polymer and its composites containing CuS and CuF2 formed against the steel disk surfaces were studied by X-ray photoelectron spectroscopy (XPS). The analysis of the XPS spectra revealed that both CuS and CuF2 decomposed under the rubbing conditions, because reduced Cu, S, FeF2 and FeSO4 were found in the transfer film. The analysis at two different depths in the transfer film of CuF2-PEEK revealed that the concentrations of Cu and FeF2 were greater close to the transfer film-counterface interface. However, there was no chemical change detected when unfilled PEEK rubbed against the steel disk surface. These results have been used to hypothesize the mechanism for the action of fillers in reducing wear. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP BAHADUR, S (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT MECH ENGN,AMES,IA 50011, USA. NR 26 TC 55 Z9 64 U1 2 U2 18 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0043-1648 J9 WEAR JI Wear PD JAN 2 PY 1993 VL 160 IS 1 BP 131 EP 138 DI 10.1016/0043-1648(93)90414-H PG 8 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA KK146 UT WOS:A1993KK14600015 ER PT B AU WARREN, WL FLEETWOOD, DM SCHWANK, JR SHANEYFELT, MR WINOKUR, PS DEVINE, RAB MASZARA, WP MCKITTERICK, JB AF WARREN, WL FLEETWOOD, DM SCHWANK, JR SHANEYFELT, MR WINOKUR, PS DEVINE, RAB MASZARA, WP MCKITTERICK, JB GP IEEE TI SHALLOW OXYGEN-RELATED DONORS IN BONDED AND ETCHBACK SILICON-ON-INSULATOR STRUCTURES SO 1993 IEEE INTERNATIONAL SOI CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1993 IEEE International SOI Conference CY OCT 05-07, 1993 CL PALM SPRINGS, CA SP IEEE, ELECTRON DEVICES SOC C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-1346-1 PY 1993 BP 28 EP 29 PG 2 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BA38C UT WOS:A1993BA38C00009 ER PT B AU BERMAN, SM FEIN, G JEWETT, DL ASHFORD, F AF BERMAN, SM FEIN, G JEWETT, DL ASHFORD, F GP ILLUMINATING ENGN SOC N AMER TI LANDOLT-C RECOGNITION IN ELDERLY SUBJECTS IS AFFECTED BY SCOTOPIC INTENSITY OF SURROUND ILLUMINANTS SO 1993 IESNA ANNUAL CONFERENCE TECHNICAL PAPERS LA English DT Proceedings Paper CT 1993 IESNA Annual Conference CY AUG 08-12, 1993 CL HOUSTON, TX SP ILLUMINATING ENGN SOC N AMER C1 LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 1 PU ILLUMINATING ENGINEERING SOC NORTH AMERICA PI NEW YORK PA 345 E 47TH STREET, NEW YORK, NY 10017-2377 PY 1993 BP 479 EP 492 PG 14 WC Engineering, Civil; Engineering, Electrical & Electronic SC Engineering GA BA49Z UT WOS:A1993BA49Z00028 ER PT J AU CLEAR, R BERMAN, S AF CLEAR, R BERMAN, S GP ILLUMINATING ENGN SOC N AMER TI ENVIRONMENTAL AND HEALTH-ASPECTS OF LIGHTING - MERCURY SO 1993 IESNA ANNUAL CONFERENCE TECHNICAL PAPERS LA English DT Proceedings Paper CT 1993 IESNA Annual Conference CY AUG 08-12, 1993 CL HOUSTON, TX SP ILLUMINATING ENGN SOC N AMER C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ILLUMINATING ENGINEERING SOC NORTH AMERICA PI NEW YORK PA 345 E 47TH STREET, NEW YORK, NY 10017-2377 PY 1993 BP 598 EP 640 PG 43 WC Engineering, Civil; Engineering, Electrical & Electronic SC Engineering GA BA49Z UT WOS:A1993BA49Z00034 ER PT B AU BERMAN, SM BULLIMORE, MA JACOBS, RJ BAILEY, IL GANDHI, N AF BERMAN, SM BULLIMORE, MA JACOBS, RJ BAILEY, IL GANDHI, N GP ILLUMINATING ENGN SOC N AMER TI AN OBJECTIVE-MEASURE OF DISCOMFORT GLARE SO 1993 IESNA ANNUAL CONFERENCE TECHNICAL PAPERS LA English DT Proceedings Paper CT 1993 IESNA Annual Conference CY AUG 08-12, 1993 CL HOUSTON, TX SP ILLUMINATING ENGN SOC N AMER C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 1 PU ILLUMINATING ENGINEERING SOC NORTH AMERICA PI NEW YORK PA 345 E 47TH STREET, NEW YORK, NY 10017-2377 PY 1993 BP 805 EP 836 PG 32 WC Engineering, Civil; Engineering, Electrical & Electronic SC Engineering GA BA49Z UT WOS:A1993BA49Z00043 ER PT B AU KIRKPATRICK, TD AHMED, DM BLACK, RL HEATH, BA ROSS, WA AF KIRKPATRICK, TD AHMED, DM BLACK, RL HEATH, BA ROSS, WA BE Wacks, ME TI DOE MIXED LOW-LEVEL WASTE OVERVIEW SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Proceedings Paper CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 EG&G IDAHO INC,IDAHO FALLS,ID 83401. NR 0 TC 0 Z9 0 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 131 EP 134 PG 4 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00025 ER PT J AU STONE, ME AF STONE, ME BE Wacks, ME TI DEVELOPMENT OF SITE TREATMENT PLANS AS REQUIRED BY THE FEDERAL FACILITY COMPLIANCE ACT SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Proceedings Paper CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 US DOE,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 135 EP 142 PG 8 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00026 ER PT J AU SIEBACH, PR KIANG, PM AF SIEBACH, PR KIANG, PM BE Wacks, ME TI PUBLIC OUTREACH WORKGROUP FOR INCINERATOR OPERATORS MEETING REPORT, DECEMBER 9-11, 1992 SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Proceedings Paper CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 US DOE,OFF WASTE OPERAT,DIV CENT OPERAT,WASHINGTON,DC 20545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 143 EP 145 PG 3 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00027 ER PT J AU VOSEN, SR KELLER, JO BRAMLETTE, TT ALLENDORF, MD KAMINSKY, R THORNBERG, SM AF VOSEN, SR KELLER, JO BRAMLETTE, TT ALLENDORF, MD KAMINSKY, R THORNBERG, SM BE Wacks, ME TI A PULSATING COMBUSTION-BASED VOLATILE ORGANIC-COMPOUND DESTRUCTION TECHNIQUE SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Proceedings Paper CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551. NR 0 TC 0 Z9 0 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 177 EP 182 PG 6 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00033 ER PT J AU BANAEE, J LARSON, RA AF BANAEE, J LARSON, RA BE Wacks, ME TI COCOMBUSTION OF A PLASTIC POLYMER - EFFECTS OF OTHER POLYMERIC AND COMBUSTIBLE CONSTITUENTS IN WASTES ON THE FORMATION OF CHLORINATED BENZENES SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Proceedings Paper CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 EG&G IDAHO INC,INEL,IDAHO FALLS,ID 83401. NR 0 TC 0 Z9 0 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 183 EP 188 PG 6 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00034 ER PT J AU MATTUS, AJ LEE, DD AF MATTUS, AJ LEE, DD BE Wacks, ME TI THE NITRATE TO AMMONIA AND CERAMIC (NAC) PROCESS SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Proceedings Paper CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 275 EP 277 PG 3 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00049 ER PT B AU AABERG, RL BURGER, LL BAKER, DA JARVIS, MF JARVIS, TT BECK, WL AF AABERG, RL BURGER, LL BAKER, DA JARVIS, MF JARVIS, TT BECK, WL BE Wacks, ME TI THE DOSE IMPACT OF ELEMENT PARTITIONING IN HAZARDOUS-WASTE INCINERATION FACILITIES SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Meeting Abstract CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 BATTELLE MEM INST,PACIFIC NW LABS,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 279 EP 279 PG 1 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00050 ER PT J AU HILLARY, JM AF HILLARY, JM BE Wacks, ME TI REVIEW OF THE TRIAL BURN MANUAL FOR THE TESTING OF METALS - A PRODUCT OF THE COALITION FOR RESPONSIBLE WASTE INCINERATION SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Proceedings Paper CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 EG&G IDAHO INC,INEL,IDAHO FALLS,ID 83401. NR 0 TC 0 Z9 0 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 411 EP 415 PG 5 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00074 ER PT B AU SURMA, JE COHN, DR SMATLAK, DL THOMAS, P WOSKOV, PP TITUS, CH WITTLE, JK HAMILTON, RA AF SURMA, JE COHN, DR SMATLAK, DL THOMAS, P WOSKOV, PP TITUS, CH WITTLE, JK HAMILTON, RA BE Wacks, ME TI GRAPHITE ELECTRODE DC ARC TECHNOLOGY DEVELOPMENT FOR TREATMENT OF BURIED WASTES SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Proceedings Paper CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 BATTELLE MEM INST,PACIFIC NW LABS,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 453 EP 456 PG 4 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00082 ER PT J AU ROSOCHA, LA ANDERSON, GK COOGAN, JJ KANG, M TENNANT, RA WANTUCK, PJ AF ROSOCHA, LA ANDERSON, GK COOGAN, JJ KANG, M TENNANT, RA WANTUCK, PJ BE Wacks, ME TI 2-STAGE THERMAL NONTHERMAL WASTE TREATMENT PROCESS SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Proceedings Paper CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 461 EP 469 PG 9 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00084 ER PT J AU NELSON, PA SWIFT, WM AF NELSON, PA SWIFT, WM BE Wacks, ME TI UNVENTED THERMAL-PROCESS FOR TREATMENT OF HAZARDOUS AND MIXED WASTES SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Proceedings Paper CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 ARGONNE NATL LAB,DIV CHEM TECHNOL,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 671 EP 678 PG 8 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00122 ER PT J AU FLOWER, WL PENG, LW BONIN, MP FRENCH, NB JOHNSEN, HA OTTESEN, DK RENZI, RF WESTBROOK, LV AF FLOWER, WL PENG, LW BONIN, MP FRENCH, NB JOHNSEN, HA OTTESEN, DK RENZI, RF WESTBROOK, LV BE Wacks, ME TI A TECHNIQUE TO CONTINUOUSLY MONITOR METAL AEROSOL EMISSIONS FROM INCINERATORS AND INDUSTRIAL-PROCESS VENTS SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Proceedings Paper CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 SANDIA NATL LABS,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 737 EP 740 PG 4 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00133 ER PT J AU MAO, ZX DEMIRGIAN, JC HWANG, E AF MAO, ZX DEMIRGIAN, JC HWANG, E BE Wacks, ME TI ONLINE MONITORING OF INCINERATOR EMISSIONS SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Proceedings Paper CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 ARGONNE NATL LAB,DIV ENERGY SYST,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 755 EP 760 PG 6 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00136 ER PT J AU DEMIRGIAN, JC HAMMER, C HWANG, E MAO, ZX AF DEMIRGIAN, JC HAMMER, C HWANG, E MAO, ZX BE Wacks, ME TI ADVANCES IN PASSIVE-REMOTE AND EXTRACTIVE FOURIER-TRANSFORM INFRARED SYSTEMS SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Proceedings Paper CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 ARGONNE NATL LAB,DIV CHEM TECHNOL,ANALYT CHEM LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 761 EP 765 PG 5 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00137 ER PT J AU SHOR, JT BOSTICK, WD HOFFMANN, DP GIBSON, LV HO, TC AF SHOR, JT BOSTICK, WD HOFFMANN, DP GIBSON, LV HO, TC BE Wacks, ME TI URANIUM EFFLUENT TESTING FOR THE OAK-RIDGE TOXIC-SUBSTANCES CONTROL ACT MIXED WASTE INCINERATOR SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Proceedings Paper CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 767 EP 771 PG 5 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00138 ER PT B AU SPONTARELLI, T BUNTAIN, GA SANCHEZ, JA BENZIGER, TM AF SPONTARELLI, T BUNTAIN, GA SANCHEZ, JA BENZIGER, TM BE Wacks, ME TI DESTRUCTION OF WASTE ENERGETIC MATERIALS USING BASE HYDROLYSIS SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Proceedings Paper CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 LOS ALAMOS NATL LAB,EXPLOS TECHNOL GRP,LOS ALAMOS,NM 87545. NR 0 TC 3 Z9 3 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 787 EP 791 PG 5 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00142 ER PT J AU CARLSON, GA AUSTIN, AL KANG, SW PETERMAN, KA DO, B AF CARLSON, GA AUSTIN, AL KANG, SW PETERMAN, KA DO, B BE Wacks, ME TI SIZE-REDUCTION OF ENERGETIC MATERIALS BY FLUID JET MACHINING SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Proceedings Paper CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 793 EP 796 PG 4 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00143 ER PT J AU KRIKORIAN, OH EBBINGHAUS, BB CONDIT, RH ADAMSON, MG FONTES, AS FLEMING, DL AF KRIKORIAN, OH EBBINGHAUS, BB CONDIT, RH ADAMSON, MG FONTES, AS FLEMING, DL BE Wacks, ME TI EXPERIMENTAL STUDIES OF ACTINIDE VOLATILITIES WITH APPLICATION TO MIXED WASTE OXIDATION PROCESSORS SO 1993 INCINERATION CONFERENCE: PROCEEDINGS: THERMAL TREATMENT OF RADIOACTIVE, HAZARDOUS CHEMICAL, MIXED, ENERGETIC, CHEMICAL WEAPON, AND MEDICAL WASTES LA English DT Proceedings Paper CT 1993 Incineration Conference: Thermal Treatment of Radioactive, Hazardous Chemical, Mixed, Energetic, Chemical Weapon, and Medical Wastes CY MAY 03-07, 1993 CL KNOXVILLE, TN SP UNIV CALIF IRVINE, AMER INST CHEM ENGINEERS, AIR & WASTE MANAGEMENT ASSOC, AMER NUCL SOC, AMER SOC MECH ENGINEERS, COALIT RESPONSIBLE WASTE INCINERAT, HLTH PHYS SOC, US DOE, US EPA C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU 1993 INCINERATION CONFERENCE PI IRVINE PA C/O CHARLOTTE BAKER, UNIV CALIFORNIA IRVINE, IRVINE, CA 92717 PY 1993 BP 809 EP 815 PG 7 WC Engineering, Environmental SC Engineering GA BA72Z UT WOS:A1993BA72Z00146 ER PT B AU CASKEY, DL AF CASKEY, DL BE Sanson, LD TI THE POTENTIAL OF INTELLIGENT VEHICLE-HIGHWAY SYSTEMS FOR ENHANCED TRAVELER SECURITY SO 1993 INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY TECHNOLOGY : SECURITY TECHNOLOGY LA English DT Proceedings Paper CT 1993 International Carnahan Conference on Security Technology: Security Technology CY OCT 13-15, 1993 CL OTTAWA, CANADA SP IEEE, LEXINGTON SECT, IEEE, AEROSP & ELECTR SYST SOC, G LEVETT & ASSOC, IEEE, OTTAWA SECT, GEORGIA TECH RES INST, CHUNG SHAN INST SCI & TECHNOLOGY, TAIPEI, NATL CHIAO TUNG UNIV, TAIPEI C1 SANDIA NATL LABS,CTR TRANSPORTAT SYST,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-1479-4 PY 1993 BP 117 EP 119 PG 3 WC Engineering, Electrical & Electronic SC Engineering GA BA51Q UT WOS:A1993BA51Q00023 ER PT B AU LEE, JD SANQUIST, TF AF LEE, JD SANQUIST, TF GP IEEE TI A SYSTEMATIC EVALUATION OF TECHNOLOGICAL INNOVATION - A CASE-STUDY OF SHIP NAVIGATION SO 1993, INTERNATIONAL CONFERENCE ON SYSTEMS, MAN AND CYBERNETICS: SYSTEMS ENGINEERING IN THE SERVICE OF HUMANS, VOL 1: CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1993 IEEE International Conference on Systems, Man and Cybernetics CY OCT 17-20, 1993 CL LE TOUQUET, FRANCE SP IEEE C1 BATTELLE SEATTLE RES CTR,SEATTLE,WA 98105. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-0911-1 PY 1993 BP 102 EP 107 PG 6 WC Automation & Control Systems; Computer Science, Cybernetics; Engineering, Electrical & Electronic SC Automation & Control Systems; Computer Science; Engineering GA BZ90S UT WOS:A1993BZ90S00019 ER PT J AU CROWLEY, RJ AF CROWLEY, RJ BE Sullivan, JD TI A NEW COOPERATIVE PROGRAM FOR THE DEVELOPMENT OF ADVANCED TECHNOLOGY FOR EMERGENCY PREPAREDNESS SO 1993 INTERNATIONAL EMERGENCY MANAGEMENT AND ENGINEERING CONFERENCE: TENTH ANNIVERSARY: RESEARCH AND APPLICATIONS LA English DT Proceedings Paper CT 1993 Simulation Multiconference on the International Emergency Management and Engineering Conference CY MAR 29-APR 01, 1993 CL ARLINGTON, VA SP SOC COMP SIMULAT, NATL INST URBAN SEARCH & RESCUE, IEEE, SYST MAN & CYBERNET SOC, AMER ENGINEERS DISASTER RELIEF, NATL EMERGENCY MANAGEMENT ASSOC, MARYLAND EMERGENCY MANAGEMENT AGCY, NATL COORDINATING COUNCIL EMERGENCY MANAGEMENT, STATE & LOCAL EMERGENCY MANAGERS DATA USERS GRP, COMMONWEALTH VIRGINIA DEPT EMERGENCY SERV C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC COMPUTER SIMULATION INT PI SAN DIEGO PA PO BOX 17900, SAN DIEGO, CA 92177 PY 1993 BP 10 EP 14 PG 5 WC Computer Science, Interdisciplinary Applications; Engineering, Civil SC Computer Science; Engineering GA BA38E UT WOS:A1993BA38E00002 ER PT J AU NEWSOM, DE MITRANI, JE AF NEWSOM, DE MITRANI, JE BE Sullivan, JD TI GEOGRAPHIC INFORMATION-SYSTEM (GIS) APPLICATIONS IN EMERGENCY MANAGEMENT SO 1993 INTERNATIONAL EMERGENCY MANAGEMENT AND ENGINEERING CONFERENCE: TENTH ANNIVERSARY: RESEARCH AND APPLICATIONS LA English DT Proceedings Paper CT 1993 Simulation Multiconference on the International Emergency Management and Engineering Conference CY MAR 29-APR 01, 1993 CL ARLINGTON, VA SP SOC COMP SIMULAT, NATL INST URBAN SEARCH & RESCUE, IEEE, SYST MAN & CYBERNET SOC, AMER ENGINEERS DISASTER RELIEF, NATL EMERGENCY MANAGEMENT ASSOC, MARYLAND EMERGENCY MANAGEMENT AGCY, NATL COORDINATING COUNCIL EMERGENCY MANAGEMENT, STATE & LOCAL EMERGENCY MANAGERS DATA USERS GRP, COMMONWEALTH VIRGINIA DEPT EMERGENCY SERV C1 ARGONNE NATL LAB,DIV ENVIRONM ASSESSMENT & INFORMAT SCI,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC COMPUTER SIMULATION INT PI SAN DIEGO PA PO BOX 17900, SAN DIEGO, CA 92177 PY 1993 BP 61 EP 61 PG 1 WC Computer Science, Interdisciplinary Applications; Engineering, Civil SC Computer Science; Engineering GA BA38E UT WOS:A1993BA38E00010 ER PT B AU PALMER, DW LIN, GK AF PALMER, DW LIN, GK GP INT SOC HYBRID MICROELECTR TI TOWARD LOW-COST DISPLAY ASSEMBLY AND PACKAGING - PRECOMPETITIVE CHALLENGES SO 1993 INTERNATIONAL SYMPOSIUM ON MICROELECTRONICS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 1993 International Symposium on Microelectronics ( ISHM 93 Proceedings ) CY NOV 09-11, 1993 CL DALLAS, TX SP INT SOC HYBRID MICROELECTR DE DISPLAYS; PACKAGING; ASSEMBLY; FLAT PANEL; COG C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1391-7 J9 P SOC PHOTO-OPT INS PY 1993 VL 2105 BP 238 EP 240 PG 3 WC Engineering, Electrical & Electronic; Instruments & Instrumentation; Optics SC Engineering; Instruments & Instrumentation; Optics GA BZ40Z UT WOS:A1993BZ40Z00037 ER PT J AU SOUTH, DW BAILEY, KA AF SOUTH, DW BAILEY, KA BE McCarl, HN TI TITLE-IV COMPLIANCE STRATEGIES AND THE INCIDENCE OF CO-POLLUTANTS AND SYNERGISTIC POLLUTION CONTROLS SO 1993 PROCEEDINGS OF THE MINERAL ECONOMICS AND MANAGEMENT SOCIETY LA English DT Proceedings Paper CT 2nd Annual Professional Conference of the Mineral-Economics-and-Management-Society CY FEB 18-20, 1993 CL RENO, NV SP MINERAL ECON & MANAGEMENT SOC C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MINERAL ECONOMICS & MANAGEMENTSOCIETY PI HOUGHTON PA PO BOX 721, HOUGHTON, MI 49931 PY 1993 BP 33 EP 33 PG 1 WC Business; Economics; Environmental Studies SC Business & Economics; Environmental Sciences & Ecology GA BC59B UT WOS:A1993BC59B00005 ER PT B AU RATHI, AK SOLANKI, RS AF RATHI, AK SOLANKI, RS BE Evans, GW Mollaghasemi, M Russell, EC Biles, WE TI SIMULATION OF TRAFFIC FLOW DURING EMERGENCY EVACUATIONS - A MICROCOMPUTER-BASED MODELING SYSTEM SO 1993 WINTER SIMULATION CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1993 Winter Simulation Conference CY DEC 12-15, 1993 CL LOS ANGELES, CA SP AMER STAT ASSOC, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP SIMULAT, IEEE, COMP SOC, IEEE, SYST MAN & CYBERNET SOC, INST IND ENGINEERS, NIST, OPERAT RES SOC AMER, INST MANAGEMENT SCI, COLL SIMULAT, SOC COMP SIMULAT INT C1 OAK RIDGE NATL LAB,CTR TRANSPORTAT ANAL,IVHS RES GRP,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 2 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-1381-X PY 1993 BP 1250 EP 1258 PG 9 WC Computer Science, Interdisciplinary Applications; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BA27E UT WOS:A1993BA27E00173 ER PT J AU LONGLEY, NP ALLISON, WWM ALNER, GJ AMBATS, I AYRES, DS BALKA, L BARR, GD BARRETT, WL BENJAMIN, D BODE, C BORDER, P BROOKS, CB COBB, JH COCKERILL, DJA COURANT, H DASGUPTA, U DAWSON, JW DEMUTH, D EDWARDS, VW EWEN, B FIELDS, TH GALLAGHER, H GARCIAGARCIA, C GILES, RH GILLER, G GOODMAN, MC GRAY, R HEPPELMANN, S HILL, N HOFTIEZER, JH JANKOWSKI, DJ JOHNS, K JOYCE, T KAFKA, T KASAHARA, S KOCHOCKI, JA LEESON, W LITCHFIELD, PJ LOPEZ, FV LOWE, M MANN, WA MARSHAK, ML MAXAM, D MAY, EN MCMASTER, L MILBUM, R MILLER, W NAPIER, A OLIVER, WP PEARCE, GF PERKINS, DH PETERSON, EA PRICE, LE ROBACK, D ROSEN, DB RUDDICK, K SAITTA, B SCHLERETH, JL SCHMID, D SCHNEPS, J SHIELD, PD SHUPE, M SUNDARALINGAM, N THOMSON, MA THRON, J TUPPER, LM VILLAUME, G WERKEMA, S WEST, N WOODS, CA AF LONGLEY, NP ALLISON, WWM ALNER, GJ AMBATS, I AYRES, DS BALKA, L BARR, GD BARRETT, WL BENJAMIN, D BODE, C BORDER, P BROOKS, CB COBB, JH COCKERILL, DJA COURANT, H DASGUPTA, U DAWSON, JW DEMUTH, D EDWARDS, VW EWEN, B FIELDS, TH GALLAGHER, H GARCIAGARCIA, C GILES, RH GILLER, G GOODMAN, MC GRAY, R HEPPELMANN, S HILL, N HOFTIEZER, JH JANKOWSKI, DJ JOHNS, K JOYCE, T KAFKA, T KASAHARA, S KOCHOCKI, JA LEESON, W LITCHFIELD, PJ LOPEZ, FV LOWE, M MANN, WA MARSHAK, ML MAXAM, D MAY, EN MCMASTER, L MILBUM, R MILLER, W NAPIER, A OLIVER, WP PEARCE, GF PERKINS, DH PETERSON, EA PRICE, LE ROBACK, D ROSEN, DB RUDDICK, K SAITTA, B SCHLERETH, JL SCHMID, D SCHNEPS, J SHIELD, PD SHUPE, M SUNDARALINGAM, N THOMSON, MA THRON, J TUPPER, LM VILLAUME, G WERKEMA, S WEST, N WOODS, CA GP INT UNION PURE & APPL PHYS TI ULTRA HIGH ENERGY COSMIC RAY COMPOSITION FROM SIMULTANEOUS SURFACE AND UNDERGROUND MEASUREMENTS AT SOUDAN-2 SO 23RD INTERNATIONAL COSMIC RAY CONFERENCE, VOL 2: CONTRIBUTED PAPERS - OG SESSIONS 6-10 LA English DT Proceedings Paper CT 23rd International Cosmic Ray Conference (XXIII ICRC) CY JUL 19-30, 1993 CL CALGARY, CANADA SP INT UNION PURE & APPL PHYS C1 ARGONNE NATL LAB,DIV HIGH ENERGY PHYS,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALGARY PR PI CALGARY PA 2500 UNIVERSITY DRIVE NW, CALGARY AB T2N 1N4, CANADA PY 1993 BP 120 EP 123 PG 4 WC Astronomy & Astrophysics; Physics, Applied; Physics, Nuclear SC Astronomy & Astrophysics; Physics GA BC03T UT WOS:A1993BC03T00033 ER PT J AU DACRUZ, MTF NORMAN, EB CHAN, Y GARCIA, A HINDI, MM LARIMER, RM LESKO, KT STOKSTAD, RG WIETFELDT, FE ZLIMEN, I AF DACRUZ, MTF NORMAN, EB CHAN, Y GARCIA, A HINDI, MM LARIMER, RM LESKO, KT STOKSTAD, RG WIETFELDT, FE ZLIMEN, I GP INT UNION PURE & APPL PHYS TI beta+-DECAY AND COSMIC-RAY HALF-LIFE OF MN-54 SO 23RD INTERNATIONAL COSMIC RAY CONFERENCE, VOL 2: CONTRIBUTED PAPERS - OG SESSIONS 6-10 LA English DT Proceedings Paper CT 23rd International Cosmic Ray Conference (XXIII ICRC) CY JUL 19-30, 1993 CL CALGARY, CANADA SP INT UNION PURE & APPL PHYS C1 LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALGARY PR PI CALGARY PA 2500 UNIVERSITY DRIVE NW, CALGARY AB T2N 1N4, CANADA PY 1993 BP 293 EP 296 PG 4 WC Astronomy & Astrophysics; Physics, Applied; Physics, Nuclear SC Astronomy & Astrophysics; Physics GA BC03T UT WOS:A1993BC03T00077 ER PT J AU DACRUZ, MTF BARDAYAN, DW CHAN, Y GARCIA, A HINDI, MM LARIMER, RM LESKO, KT NORMAN, EB ROSSI, DF STOKSTAD, RG WIETFELDT, FE ZIMEN, I AF DACRUZ, MTF BARDAYAN, DW CHAN, Y GARCIA, A HINDI, MM LARIMER, RM LESKO, KT NORMAN, EB ROSSI, DF STOKSTAD, RG WIETFELDT, FE ZIMEN, I GP UNIV CALGARY TI THICK-TARGET YIELDS OF IODINE ISOTOPES FROM PROTON INTERACTIONS IN TE, AND THE DOUBLE-beta DECAY OF TE-128, TE-130 SO 23RD INTERNATIONAL COSMIC RAY CONFERENCE, VOL 3: CONTRIBUTED PAPERS - SH SESSIONS LA English DT Proceedings Paper CT 23rd International Cosmic Ray Conference (XXIII ICRC) CY JUL 19-30, 1993 CL CALGARY, CANADA SP INT UNION PURE & APPL PHYS C1 LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALGARY PR PI CALGARY PA 2500 UNIVERSITY DRIVE NW, CALGARY AB T2N 1N4, CANADA PY 1993 BP 850 EP 853 PG 4 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA BC09G UT WOS:A1993BC09G00221 ER PT J AU ANTHONY, P BECKERSZENDY, R BOSTED, P CAVALLISFORZA, M KELLER, L KELLEY, L KLEIN, S NIEMI, G PERL, M ROCHESTER, L WHITE, J AF ANTHONY, P BECKERSZENDY, R BOSTED, P CAVALLISFORZA, M KELLER, L KELLEY, L KLEIN, S NIEMI, G PERL, M ROCHESTER, L WHITE, J GP INT UNION PURE & APPL PHYS TI A STUDY OF LPM SUPPRESSION OF BREMSSTRAHLUNG AT 25 GEV SO 23RD INTERNATIONAL COSMIC RAY CONFERENCE, VOL 4: CONTRIBUTED PAPERS - HE SESSIONS LA English DT Proceedings Paper CT 23rd International Cosmic Ray Conference (XXIII ICRC) CY JUL 19-30, 1993 CL CALGARY, CANADA SP INT UNION PURE & APPL PHYS C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALGARY PR PI CALGARY PA 2500 UNIVERSITY DRIVE NW, CALGARY AB T2N 1N4, CANADA PY 1993 BP 175 EP 178 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC18G UT WOS:A1993BC18G00045 ER PT J AU ALLISON, WWM ALNER, GJ AMBATS, I AYRES, DS BALKA, L BAR, GD BARRETT, WL BENJAMIN, D BODE, C BORDER, P BROOKS, CB COBB, JH COCKERILL, DJA COURANT, H DAWSON, J DEMUTH, D EDWARDS, VW EWEN, B FIELDS, T GALLAGHER, H GARCIAGARCIA, C GILES, RH GILLER, GL GOODMAN, MC GRAY, R HILL, N HOFTIEZER, JH JANKOWSKI, DJ JOHNS, K JOYCE, T KAFKA, T KASAHARA, S KOCHOCKI, J LEESON, W LITCHFIELD, PJ LONGLEY, N LOPEZ, F LOWE, M MANN, WA MARSHAK, ML MAXAM, D MAY, EN MCMASTER, L MILBURN, R MILLER, WH MINOR, C NAPIER, A OLIVER, W PEARCE, GF PERKINS, DH PETERSON, EA PRICE, LE ROBACK, D ROSEN, D RUDDICK, K SAITTA, B SCHMID, D SCHLERETH, J SCHNEPS, J SHIELD, PD SHUPE, M SUNDARALINGAM, N THOMSON, MA THRON, JL TUPPER, LM VILLAUME, G WERKEMA, SJ WEST, N WOODS, CA AF ALLISON, WWM ALNER, GJ AMBATS, I AYRES, DS BALKA, L BAR, GD BARRETT, WL BENJAMIN, D BODE, C BORDER, P BROOKS, CB COBB, JH COCKERILL, DJA COURANT, H DAWSON, J DEMUTH, D EDWARDS, VW EWEN, B FIELDS, T GALLAGHER, H GARCIAGARCIA, C GILES, RH GILLER, GL GOODMAN, MC GRAY, R HILL, N HOFTIEZER, JH JANKOWSKI, DJ JOHNS, K JOYCE, T KAFKA, T KASAHARA, S KOCHOCKI, J LEESON, W LITCHFIELD, PJ LONGLEY, N LOPEZ, F LOWE, M MANN, WA MARSHAK, ML MAXAM, D MAY, EN MCMASTER, L MILBURN, R MILLER, WH MINOR, C NAPIER, A OLIVER, W PEARCE, GF PERKINS, DH PETERSON, EA PRICE, LE ROBACK, D ROSEN, D RUDDICK, K SAITTA, B SCHMID, D SCHLERETH, J SCHNEPS, J SHIELD, PD SHUPE, M SUNDARALINGAM, N THOMSON, MA THRON, JL TUPPER, LM VILLAUME, G WERKEMA, SJ WEST, N WOODS, CA GP INT UNION PURE & APPL PHYS TI MULTIPLE MUON EVENTS OBSERVED IN THE SOUDAN-2 DETECTOR SO 23RD INTERNATIONAL COSMIC RAY CONFERENCE, VOL 4: CONTRIBUTED PAPERS - HE SESSIONS LA English DT Proceedings Paper CT 23rd International Cosmic Ray Conference (XXIII ICRC) CY JUL 19-30, 1993 CL CALGARY, CANADA SP INT UNION PURE & APPL PHYS C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALGARY PR PI CALGARY PA 2500 UNIVERSITY DRIVE NW, CALGARY AB T2N 1N4, CANADA PY 1993 BP 398 EP 398 PG 1 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC18G UT WOS:A1993BC18G00103 ER PT J AU ALLISON, WWM ALNER, GJ AMBATS, I AYRES, DS BALKA, L BARR, GD BARRETT, WL BENJAMIN, D BODE, C BORDER, P BROOKS, C COBB, JH COCKERILL, DJA COURANT, H DAWSON, J DEMUTH, D EDWARDS, VW EWEN, B FIELDS, T GALLAGHER, H GARCIAGARCIA, C GILES, RH GILLER, GL GOODMAN, MC GRAY, R HILL, N HOFTIEZER, JH JANKOWSKI, DJ JOHNS, K KAFKA, T KASAHARA, S KOCHOCKI, J LEESON, W LITCHFIELD, PJ LONGLEY, N LOPEZ, F LOWE, M MANN, WA MARSHAK, ML MAXAM, D MAY, EN MCMASTER, L MILBURN, R JMILLER, WH MINOR, C NAPIER, A OLIVER, W PEARCE, GF PERKINS, DH PETERSON, EA PRICE, LE ROBACK, D ROSEN, D RUDDICK, K SAITTA, B SCHMID, D SCHLERETH, J SCHNEPS, J SHIELD, P SHUPE, M SUNDARALINGAM, N THOMSON, M THRON, JL TUPPER, LM VILLAUME, G WERKEMA, SJ WEST, N WOODS, CA AF ALLISON, WWM ALNER, GJ AMBATS, I AYRES, DS BALKA, L BARR, GD BARRETT, WL BENJAMIN, D BODE, C BORDER, P BROOKS, C COBB, JH COCKERILL, DJA COURANT, H DAWSON, J DEMUTH, D EDWARDS, VW EWEN, B FIELDS, T GALLAGHER, H GARCIAGARCIA, C GILES, RH GILLER, GL GOODMAN, MC GRAY, R HILL, N HOFTIEZER, JH JANKOWSKI, DJ JOHNS, K KAFKA, T KASAHARA, S KOCHOCKI, J LEESON, W LITCHFIELD, PJ LONGLEY, N LOPEZ, F LOWE, M MANN, WA MARSHAK, ML MAXAM, D MAY, EN MCMASTER, L MILBURN, R JMILLER, WH MINOR, C NAPIER, A OLIVER, W PEARCE, GF PERKINS, DH PETERSON, EA PRICE, LE ROBACK, D ROSEN, D RUDDICK, K SAITTA, B SCHMID, D SCHLERETH, J SCHNEPS, J SHIELD, P SHUPE, M SUNDARALINGAM, N THOMSON, M THRON, JL TUPPER, LM VILLAUME, G WERKEMA, SJ WEST, N WOODS, CA GP INT UNION PURE & APPL PHYS TI CONTAINED V-EVENTS OBSERVED IN SOUDAN-2 SO 23RD INTERNATIONAL COSMIC RAY CONFERENCE, VOL 4: CONTRIBUTED PAPERS - HE SESSIONS LA English DT Proceedings Paper CT 23rd International Cosmic Ray Conference (XXIII ICRC) CY JUL 19-30, 1993 CL CALGARY, CANADA SP INT UNION PURE & APPL PHYS C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALGARY PR PI CALGARY PA 2500 UNIVERSITY DRIVE NW, CALGARY AB T2N 1N4, CANADA PY 1993 BP 446 EP 448 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC18G UT WOS:A1993BC18G00116 ER PT J AU ALLISON, WWM ALNER, GJ AMBATS, I AYRES, DS BALKA, L BARR, GD BARRETT, WL BENJAMIN, D BODE, C BORDER, P BROOKS, CB COBB, JH COCKERILL, DJA COURANT, H DAWSON, J DEMUTH, D EDWARDS, VW EWEN, B FIELDS, T GALLAGHER, H GARCIAGARCIA, S GILES, RH GILLER, GL GOODMAN, MC GRAY, R HEILIG, S HILL, N HOFTIEZER, JH JANKOWSKI, DJ JOHNS, K KAFKA, T KASHARA, S KOCHOCKI, J LEESON, W LITCHFIELD, PJ LONGLEY, N LOPEZ, F LOWE, M MANN, WA MARSHAK, ML MAXAM, D MAY, EN MCMASTER, L MILBURN, R MILLER, WH MINOR, C NAPIER, A OLIVER, W PEARCE, GF PERKINS, DH PETERSON, EA PRICE, LE ROBACK, D ROSEN, D RUDDICK, K SAITTA, B SCHMID, D SCHLERETH, J SCHNEPS, J SHIELD, P SHUPE, M SUNDARALINGAM, N THOMSON, M THRON, JL TUPPER, LM VILLAUME, G WERKEMA, SJ WEST, N WOODS, CA AF ALLISON, WWM ALNER, GJ AMBATS, I AYRES, DS BALKA, L BARR, GD BARRETT, WL BENJAMIN, D BODE, C BORDER, P BROOKS, CB COBB, JH COCKERILL, DJA COURANT, H DAWSON, J DEMUTH, D EDWARDS, VW EWEN, B FIELDS, T GALLAGHER, H GARCIAGARCIA, S GILES, RH GILLER, GL GOODMAN, MC GRAY, R HEILIG, S HILL, N HOFTIEZER, JH JANKOWSKI, DJ JOHNS, K KAFKA, T KASHARA, S KOCHOCKI, J LEESON, W LITCHFIELD, PJ LONGLEY, N LOPEZ, F LOWE, M MANN, WA MARSHAK, ML MAXAM, D MAY, EN MCMASTER, L MILBURN, R MILLER, WH MINOR, C NAPIER, A OLIVER, W PEARCE, GF PERKINS, DH PETERSON, EA PRICE, LE ROBACK, D ROSEN, D RUDDICK, K SAITTA, B SCHMID, D SCHLERETH, J SCHNEPS, J SHIELD, P SHUPE, M SUNDARALINGAM, N THOMSON, M THRON, JL TUPPER, LM VILLAUME, G WERKEMA, SJ WEST, N WOODS, CA GP INT UNION PURE & APPL PHYS TI MEASUREMENT OF MUONS IN THE SOUDAN-2 DETECTOR SO 23RD INTERNATIONAL COSMIC RAY CONFERENCE, VOL 4: CONTRIBUTED PAPERS - HE SESSIONS LA English DT Proceedings Paper CT 23rd International Cosmic Ray Conference (XXIII ICRC) CY JUL 19-30, 1993 CL CALGARY, CANADA SP INT UNION PURE & APPL PHYS C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALGARY PR PI CALGARY PA 2500 UNIVERSITY DRIVE NW, CALGARY AB T2N 1N4, CANADA PY 1993 BP 458 EP 459 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC18G UT WOS:A1993BC18G00120 ER PT J AU BECKERSZENDY, R BRATTON, CB BREAULT, J CASPER, D DYE, ST GAJEWSKI, W GOLDHABER, M HAINES, TJ HALVERSON, PG KIELCZEWSKA, D KROPP, WR LEARNED, JG LOSECCO, J MATSUNO, S MATTHEWS, J MCGRATH, G MCGREW, C MILLER, RS PRICE, L REINES, F SCHULTZ, J SINCLAIR, D SOBEL, HW STONE, JL SULAK, LR SVOBODA, R VANDERVELDE, JC AF BECKERSZENDY, R BRATTON, CB BREAULT, J CASPER, D DYE, ST GAJEWSKI, W GOLDHABER, M HAINES, TJ HALVERSON, PG KIELCZEWSKA, D KROPP, WR LEARNED, JG LOSECCO, J MATSUNO, S MATTHEWS, J MCGRATH, G MCGREW, C MILLER, RS PRICE, L REINES, F SCHULTZ, J SINCLAIR, D SOBEL, HW STONE, JL SULAK, LR SVOBODA, R VANDERVELDE, JC GP INT UNION PURE & APPL PHYS TI A SEARCH FOR ASTROPHYSICAL SOURCES OF LOW-ENERGY NEUTRINOS USING THE IMB DETECTOR SO 23RD INTERNATIONAL COSMIC RAY CONFERENCE, VOL 4: CONTRIBUTED PAPERS - HE SESSIONS LA English DT Proceedings Paper CT 23rd International Cosmic Ray Conference (XXIII ICRC) CY JUL 19-30, 1993 CL CALGARY, CANADA SP INT UNION PURE & APPL PHYS C1 SLAC,STANFORD,CA 94309. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALGARY PR PI CALGARY PA 2500 UNIVERSITY DRIVE NW, CALGARY AB T2N 1N4, CANADA PY 1993 BP 476 EP 479 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC18G UT WOS:A1993BC18G00125 ER PT J AU GOODMAN, MC AF GOODMAN, MC GP INT UNION PURE & APPL PHYS TI ARE THERE ATMOSPHERIC NEUTRINO OSCILLATIONS SO 23RD INTERNATIONAL COSMIC RAY CONFERENCE, VOL 4: CONTRIBUTED PAPERS - HE SESSIONS LA English DT Proceedings Paper CT 23rd International Cosmic Ray Conference (XXIII ICRC) CY JUL 19-30, 1993 CL CALGARY, CANADA SP INT UNION PURE & APPL PHYS C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALGARY PR PI CALGARY PA 2500 UNIVERSITY DRIVE NW, CALGARY AB T2N 1N4, CANADA PY 1993 BP 500 EP 502 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC18G UT WOS:A1993BC18G00132 ER PT J AU ALLISON, WWM ALNER, GJ AMBATS, I AYRES, DS BALKA, L BARR, GD BARRETT, WL BENJAMIN, D BODE, C BORDER, P BROOKS, CB COBB, JH COCKERILL, DJA COURANT, H DAWSON, J DEMUTH, D EDWARDS, VW EWEN, S FIELDS, T GALLAGHER, H GARCIAGARCIA, C GILES, RH GILLER, GL GOODMAN, MC GRAY, R HILL, N HOFTIEZER, JH JANKOWSKI, DJ JOHNS, K KAFKA, T KASAHARA, S KOCHOCKI, J LEESON, W LITCHFIELD, PJ LONGLEY, N LOPEZ, F LOWE, M MANN, WA MARSHAK, ML MAXAM, D MAY, EN MCMASTER, L MILBURN, R MILLER, WH MINOR, C NAPIER, A OLIVER, W PEARCE, GF PERKINS, DH PETERSON, EA PRICE, LE ROBACK, D ROSEN, D RUDDICK, K SAITTA, B SCHMID, D SCHLERETH, J SCHNEPS, J SHIELD, P SHUPE, M SUNDARALINGAM, N THOMSON, M THRON, JL TROST, HJ TUPPER, LM URETSKY, J VILLAUME, G WERKEMA, SJ WEST, N WOODS, CA AF ALLISON, WWM ALNER, GJ AMBATS, I AYRES, DS BALKA, L BARR, GD BARRETT, WL BENJAMIN, D BODE, C BORDER, P BROOKS, CB COBB, JH COCKERILL, DJA COURANT, H DAWSON, J DEMUTH, D EDWARDS, VW EWEN, S FIELDS, T GALLAGHER, H GARCIAGARCIA, C GILES, RH GILLER, GL GOODMAN, MC GRAY, R HILL, N HOFTIEZER, JH JANKOWSKI, DJ JOHNS, K KAFKA, T KASAHARA, S KOCHOCKI, J LEESON, W LITCHFIELD, PJ LONGLEY, N LOPEZ, F LOWE, M MANN, WA MARSHAK, ML MAXAM, D MAY, EN MCMASTER, L MILBURN, R MILLER, WH MINOR, C NAPIER, A OLIVER, W PEARCE, GF PERKINS, DH PETERSON, EA PRICE, LE ROBACK, D ROSEN, D RUDDICK, K SAITTA, B SCHMID, D SCHLERETH, J SCHNEPS, J SHIELD, P SHUPE, M SUNDARALINGAM, N THOMSON, M THRON, JL TROST, HJ TUPPER, LM URETSKY, J VILLAUME, G WERKEMA, SJ WEST, N WOODS, CA GP INT UNION PURE & APPL PHYS TI STATUS OF THE SOUDAN-2 DETECTOR EXPERIMENT SO 23RD INTERNATIONAL COSMIC RAY CONFERENCE, VOL 4: CONTRIBUTED PAPERS - HE SESSIONS LA English DT Proceedings Paper CT 23rd International Cosmic Ray Conference (XXIII ICRC) CY JUL 19-30, 1993 CL CALGARY, CANADA SP INT UNION PURE & APPL PHYS C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALGARY PR PI CALGARY PA 2500 UNIVERSITY DRIVE NW, CALGARY AB T2N 1N4, CANADA PY 1993 BP 688 EP 691 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BC18G UT WOS:A1993BC18G00181 ER PT J AU LAUF, RJ PAULAUSKAS, FL JOHNSON, AC AF LAUF, RJ PAULAUSKAS, FL JOHNSON, AC GP INT MICROWAVE POWER INST TI POLYMER CURING IN A VARIABLE FREQUENCY MICROWAVE OVEN SO 28TH MICROWAVE SYMPOSIUM PROCEEDINGS - QUALITY ENHANCEMENTS USING MICROWAVES LA English DT Proceedings Paper CT 28th Microwave Symposium on Quality Enhancements Using Microwaves CY JUL 12-14, 1993 CL MONTREAL, CANADA SP INT MICROWAVE POWER INST C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT MICROWAVE POWER INST PI MANASSAS PA 10210 LEATHERLEAF COURT, MANASSAS, VA 22111 PY 1993 BP 150 EP 155 PG 6 WC Engineering, Chemical; Engineering, Manufacturing; Engineering, Electrical & Electronic; Food Science & Technology; Physics, Condensed Matter SC Engineering; Food Science & Technology; Physics GA BB74H UT WOS:A1993BB74H00026 ER PT S AU MITCHELL, SA AF MITCHELL, SA GP IEEE, COMP SOC TI REFINING A TRIANGULATION OF A PLANAR STRAIGHT-LINE GRAPH TO ELIMINATE LARGE ANGLES SO 34TH ANNUAL SYMPOSIUM ON FOUNDATIONS OF COMPUTER SCIENCE: PROCEEDINGS SE ANNUAL SYMPOSIUM ON FOUNDATIONS OF COMPUTER SCIENCE LA English DT Proceedings Paper CT 34th Annual Symposium on Foundations of Computer Science (FOCS 93) CY NOV 03-05, 1993 CL PALO ALTO, CA SP IEEE, COMP SOC, TECH COMM MATH FDN COMP C1 SANDIA NATL LABS,DEPT APPL & NUMER MATH,ALBUQUERQUE,NM 87185. NR 0 TC 8 Z9 8 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 0272-5428 BN 0-8186-4370-6 J9 AN S FDN CO PY 1993 BP 583 EP 591 PG 9 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic; Mathematics, Applied SC Computer Science; Engineering; Mathematics GA BZ64D UT WOS:A1993BZ64D00060 ER PT B AU STONE, JL AF STONE, JL GP 7TH INT PVSEC ORGANIZING COMM TI SOLAR-2000 - THE NEXT CRITICAL STEP TOWARDS LARGE-SCALE COMMERCIALIZATION OF PHOTOVOLTAICS IN THE UNITED-STATES SO 7TH INTERNATIONAL PHOTOVOLTAIC SCIENCE AND ENGINEERING CONFERENCE, TECHNICAL DIGEST LA English DT Proceedings Paper CT 7th International Photovoltaic Science and Engineering Conference (PVSEC-7) CY NOV 22-26, 1993 CL NAGOYA, JAPAN SP Japan Soc Appl Phys, Inst Elect Engineers Japan, Nagoya Ind Sci Res Inst, Chem Soc Japan, Electrochem Soc Japan, Illuminating Engn Inst Japan, IEEE, Electron Devices Soc, Inst Electr Informat & Commun Engineers, Inst Televis Engineers Japan, Int Solar Energy Soc, Japanese Sect, Japan Soc Aeronaut & Space Sci, Japan Soc Direct Energy Convers, Japan Solar Energy Soc, Commiss EC, Photovoltaic Div C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. NR 0 TC 1 Z9 1 U1 0 U2 1 PU INTERNATIONAL PVSEC-7 PI NAGOYA 466 PA C/O MASAYOSHI UMENO DEPT ELECT & COMP ENGN NAGOYA INST TECH, NAGOYA 466 JAPAN PY 1993 BP 7 EP 10 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied SC Energy & Fuels; Engineering; Physics GA BB94Z UT WOS:A1993BB94Z00002 ER PT B AU BASORE, PA GEE, JM BUCK, ME SCHUBERT, WK RUBY, DS AF BASORE, PA GEE, JM BUCK, ME SCHUBERT, WK RUBY, DS GP 7TH INT PVSEC ORGANIZING COMM TI SIMPLIFIED HIGH-EFFICIENCY SILICON CELL PROCESSING SO 7TH INTERNATIONAL PHOTOVOLTAIC SCIENCE AND ENGINEERING CONFERENCE, TECHNICAL DIGEST LA English DT Proceedings Paper CT 7th International Photovoltaic Science and Engineering Conference (PVSEC-7) CY NOV 22-26, 1993 CL NAGOYA, JAPAN SP Japan Soc Appl Phys, Inst Elect Engineers Japan, Nagoya Ind Sci Res Inst, Chem Soc Japan, Electrochem Soc Japan, Illuminating Engn Inst Japan, IEEE, Electron Devices Soc, Inst Electr Informat & Commun Engineers, Inst Televis Engineers Japan, Int Solar Energy Soc, Japanese Sect, Japan Soc Aeronaut & Space Sci, Japan Soc Direct Energy Convers, Japan Solar Energy Soc, Commiss EC, Photovoltaic Div C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INTERNATIONAL PVSEC-7 PI NAGOYA 466 PA C/O MASAYOSHI UMENO DEPT ELECT & COMP ENGN NAGOYA INST TECH, NAGOYA 466 JAPAN PY 1993 BP 61 EP 64 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied SC Energy & Fuels; Engineering; Physics GA BB94Z UT WOS:A1993BB94Z00017 ER PT J AU RANNELS, JE AF RANNELS, JE GP 7TH INT PVSEC ORGANIZING COMM TI UNITED-STATES NATIONAL-PHOTOVOLTAIC-PROGRAM SO 7TH INTERNATIONAL PHOTOVOLTAIC SCIENCE AND ENGINEERING CONFERENCE, TECHNICAL DIGEST LA English DT Proceedings Paper CT 7th International Photovoltaic Science and Engineering Conference (PVSEC-7) CY NOV 22-26, 1993 CL NAGOYA, JAPAN SP Japan Soc Appl Phys, Inst Elect Engineers Japan, Nagoya Ind Sci Res Inst, Chem Soc Japan, Electrochem Soc Japan, Illuminating Engn Inst Japan, IEEE, Electron Devices Soc, Inst Electr Informat & Commun Engineers, Inst Televis Engineers Japan, Int Solar Energy Soc, Japanese Sect, Japan Soc Aeronaut & Space Sci, Japan Soc Direct Energy Convers, Japan Solar Energy Soc, Commiss EC, Photovoltaic Div C1 US DOE,DIV PHOTOVOLTAIC,WASHINGTON,DC 20585. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INTERNATIONAL PVSEC-7 PI NAGOYA 466 PA C/O MASAYOSHI UMENO DEPT ELECT & COMP ENGN NAGOYA INST TECH, NAGOYA 466 JAPAN PY 1993 BP 109 EP 111 PG 3 WC Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied SC Energy & Fuels; Engineering; Physics GA BB94Z UT WOS:A1993BB94Z00032 ER PT B AU AHRENKIEL, RK ALJASSIM, MM AF AHRENKIEL, RK ALJASSIM, MM GP 7TH INT PVSEC ORGANIZING COMM TI CHARACTERIZATION TECHNIQUES FOR SUPER HIGH EFFICIENCY III-V-COMPOUND PHOTOVOLTAIC DEVICES SO 7TH INTERNATIONAL PHOTOVOLTAIC SCIENCE AND ENGINEERING CONFERENCE, TECHNICAL DIGEST LA English DT Proceedings Paper CT 7th International Photovoltaic Science and Engineering Conference (PVSEC-7) CY NOV 22-26, 1993 CL NAGOYA, JAPAN SP Japan Soc Appl Phys, Inst Elect Engineers Japan, Nagoya Ind Sci Res Inst, Chem Soc Japan, Electrochem Soc Japan, Illuminating Engn Inst Japan, IEEE, Electron Devices Soc, Inst Electr Informat & Commun Engineers, Inst Televis Engineers Japan, Int Solar Energy Soc, Japanese Sect, Japan Soc Aeronaut & Space Sci, Japan Soc Direct Energy Convers, Japan Solar Energy Soc, Commiss EC, Photovoltaic Div C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. NR 0 TC 0 Z9 0 U1 0 U2 1 PU INTERNATIONAL PVSEC-7 PI NAGOYA 466 PA C/O MASAYOSHI UMENO DEPT ELECT & COMP ENGN NAGOYA INST TECH, NAGOYA 466 JAPAN PY 1993 BP 323 EP 326 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied SC Energy & Fuels; Engineering; Physics GA BB94Z UT WOS:A1993BB94Z00109 ER PT B AU TUTTLE, JR GABOR, A ALBIN, DS TENNANT, A CONTRERAS, M CARAPELLA, JJ QU, Y DU, D NOUFI, R AF TUTTLE, JR GABOR, A ALBIN, DS TENNANT, A CONTRERAS, M CARAPELLA, JJ QU, Y DU, D NOUFI, R GP 7TH INT PVSEC ORGANIZING COMM TI HIGH-EFFICIENCY CU(IN,GA)SE2-BASED THIN-FILM SOLAR CELLS - 15% DEVICE EFFICIENCIES AND BEYOND BY SIMPLE FABRICATION PROCESSES SO 7TH INTERNATIONAL PHOTOVOLTAIC SCIENCE AND ENGINEERING CONFERENCE, TECHNICAL DIGEST LA English DT Proceedings Paper CT 7th International Photovoltaic Science and Engineering Conference (PVSEC-7) CY NOV 22-26, 1993 CL NAGOYA, JAPAN SP Japan Soc Appl Phys, Inst Elect Engineers Japan, Nagoya Ind Sci Res Inst, Chem Soc Japan, Electrochem Soc Japan, Illuminating Engn Inst Japan, IEEE, Electron Devices Soc, Inst Electr Informat & Commun Engineers, Inst Televis Engineers Japan, Int Solar Energy Soc, Japanese Sect, Japan Soc Aeronaut & Space Sci, Japan Soc Direct Energy Convers, Japan Solar Energy Soc, Commiss EC, Photovoltaic Div C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. NR 0 TC 0 Z9 0 U1 0 U2 1 PU INTERNATIONAL PVSEC-7 PI NAGOYA 466 PA C/O MASAYOSHI UMENO DEPT ELECT & COMP ENGN NAGOYA INST TECH, NAGOYA 466 JAPAN PY 1993 BP 523 EP 523 PG 1 WC Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied SC Energy & Fuels; Engineering; Physics GA BB94Z UT WOS:A1993BB94Z00183 ER PT J AU BIRKMIRE, RW AF BIRKMIRE, RW GP 7TH INT PVSEC ORGANIZING COMM TI HIGH EFFICIENCY CUINSE2 SOLAR CELLS USING THE SELENIZATION PROCESS SO 7TH INTERNATIONAL PHOTOVOLTAIC SCIENCE AND ENGINEERING CONFERENCE, TECHNICAL DIGEST LA English DT Proceedings Paper CT 7th International Photovoltaic Science and Engineering Conference (PVSEC-7) CY NOV 22-26, 1993 CL NAGOYA, JAPAN SP Japan Soc Appl Phys, Inst Elect Engineers Japan, Nagoya Ind Sci Res Inst, Chem Soc Japan, Electrochem Soc Japan, Illuminating Engn Inst Japan, IEEE, Electron Devices Soc, Inst Electr Informat & Commun Engineers, Inst Televis Engineers Japan, Int Solar Energy Soc, Japanese Sect, Japan Soc Aeronaut & Space Sci, Japan Soc Direct Energy Convers, Japan Solar Energy Soc, Commiss EC, Photovoltaic Div C1 UNIV DELAWARE,INST ENERGY CONVERS,CTR EXCELLENCE PHOTOVOLTAIC RES & EDUC,US DOE,NEWARK,DE 19718. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INTERNATIONAL PVSEC-7 PI NAGOYA 466 PA C/O MASAYOSHI UMENO DEPT ELECT & COMP ENGN NAGOYA INST TECH, NAGOYA 466 JAPAN PY 1993 BP 527 EP 530 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied SC Energy & Fuels; Engineering; Physics GA BB94Z UT WOS:A1993BB94Z00184 ER PT B AU DEMARTEAU, M AF DEMARTEAU, M BE TranThanhVan, J TI ELECTROWEAK RESULTS FROM DO SO '93 ELECTROWEAK INTERACTIONS AND UNIFIED THEORIES SE MORIOND PARTICLE PHYSICS MEETINGS LA English DT Proceedings Paper CT XXVIIIth Moriond Particle Physics Meeting on Electroweak Interactions and Unified Theories CY MAR 13-20, 1993 CL LES ARCS, FRANCE SP COMMISS EUROPEAN COMMUNITIES, CNRS, CEA C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-137-4 J9 MORIOND PAR PY 1993 BP 9 EP 16 PG 8 WC Physics, Particles & Fields; Physics, Mathematical SC Physics GA BA96F UT WOS:A1993BA96F00002 ER PT B AU SUNDRUM, R AF SUNDRUM, R BE TranThanhVan, J TI TECHNICOLOR IN THE AGE OF LEP SO '93 ELECTROWEAK INTERACTIONS AND UNIFIED THEORIES SE MORIOND PARTICLE PHYSICS MEETINGS LA English DT Proceedings Paper CT XXVIIIth Moriond Particle Physics Meeting on Electroweak Interactions and Unified Theories CY MAR 13-20, 1993 CL LES ARCS, FRANCE SP COMMISS EUROPEAN COMMUNITIES, CNRS, CEA C1 LAWRENCE BERKELEY LAB,DIV PHYS,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-137-4 J9 MORIOND PAR PY 1993 BP 127 EP 133 PG 7 WC Physics, Particles & Fields; Physics, Mathematical SC Physics GA BA96F UT WOS:A1993BA96F00016 ER PT B AU HINCHLIFFE, I AF HINCHLIFFE, I BE TranThanhVan, J TI STATUS OF ALPHA(S) MEASUREMENTS SO '93 ELECTROWEAK INTERACTIONS AND UNIFIED THEORIES SE MORIOND PARTICLE PHYSICS MEETINGS LA English DT Proceedings Paper CT XXVIIIth Moriond Particle Physics Meeting on Electroweak Interactions and Unified Theories CY MAR 13-20, 1993 CL LES ARCS, FRANCE SP COMMISS EUROPEAN COMMUNITIES, CNRS, CEA C1 LAWRENCE BERKELEY LAB,DIV PHYS,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-137-4 J9 MORIOND PAR PY 1993 BP 153 EP 160 PG 8 WC Physics, Particles & Fields; Physics, Mathematical SC Physics GA BA96F UT WOS:A1993BA96F00019 ER PT B AU PROTOPOPESCU, SD AF PROTOPOPESCU, SD BE TranThanhVan, J TI SEARCH FOR TOP-QUARK WITH D0 DETECTOR SO '93 ELECTROWEAK INTERACTIONS AND UNIFIED THEORIES SE MORIOND PARTICLE PHYSICS MEETINGS LA English DT Proceedings Paper CT XXVIIIth Moriond Particle Physics Meeting on Electroweak Interactions and Unified Theories CY MAR 13-20, 1993 CL LES ARCS, FRANCE SP COMMISS EUROPEAN COMMUNITIES, CNRS, CEA C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-137-4 J9 MORIOND PAR PY 1993 BP 169 EP 175 PG 7 WC Physics, Particles & Fields; Physics, Mathematical SC Physics GA BA96F UT WOS:A1993BA96F00021 ER PT B AU SHAPIRO, MD AF SHAPIRO, MD BE TranThanhVan, J TI MEASUREMENT OF THE MEAN LIFETIME OF B-HADRONS PRODUCED IN HADRON-COLLISIONS SO '93 ELECTROWEAK INTERACTIONS AND UNIFIED THEORIES SE MORIOND PARTICLE PHYSICS MEETINGS LA English DT Proceedings Paper CT XXVIIIth Moriond Particle Physics Meeting on Electroweak Interactions and Unified Theories CY MAR 13-20, 1993 CL LES ARCS, FRANCE SP COMMISS EUROPEAN COMMUNITIES, CNRS, CEA C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-137-4 J9 MORIOND PAR PY 1993 BP 277 EP 282 PG 6 WC Physics, Particles & Fields; Physics, Mathematical SC Physics GA BA96F UT WOS:A1993BA96F00037 ER PT B AU WILLIAMS, GP AF WILLIAMS, GP BE Bertie, JE Wieser, H TI FOURIER-TRANSFORM SPECTROSCOPY WITH SYNCHROTRON-RADIATION IN THE MID AND FAR-INFRARED WITH EXTENSIONS TO THE VUV AND SOFT-X-RAY REGION SO 9TH INTERNATIONAL CONFERENCE ON FOURIER TRANSFORM SPECTROSCOPY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 9th International Conference on Fourier Transform Spectroscopy CY AUG 23-27, 1993 CL CALGARY, CANADA SP COBLENTZ SOC, UNIV CALGARY, DEPT CHEM, SPECTROSCOPY SOC CANADA C1 BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE,UPTON,NY 11973. NR 0 TC 2 Z9 2 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1360-7 J9 P SOC PHOTO-OPT INS PY 1993 VL 2089 BP 62 EP 68 PG 7 WC Spectroscopy SC Spectroscopy GA BZ89P UT WOS:A1993BZ89P00011 ER PT B AU POWELL, GL DOBBINS, AG CRISTY, SS CLIFF, TL MEYER, HM LUCANIA, J MILOSEVIC, M AF POWELL, GL DOBBINS, AG CRISTY, SS CLIFF, TL MEYER, HM LUCANIA, J MILOSEVIC, M BE Bertie, JE Wieser, H TI THE STUDY OF THE OXIDATION OF URANIUM BY EXTERNAL AND DIFFUSE-REFLECTANCE FTIR SPECTROSCOPY USING REMOTE-SENSING AND EVACUABLE CELL TECHNIQUES SO 9TH INTERNATIONAL CONFERENCE ON FOURIER TRANSFORM SPECTROSCOPY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 9th International Conference on Fourier Transform Spectroscopy CY AUG 23-27, 1993 CL CALGARY, CANADA SP COBLENTZ SOC, UNIV CALGARY, DEPT CHEM, SPECTROSCOPY SOC CANADA C1 OAK RIDGE Y-12 PLANT,OAK RIDGE,TN 37831. NR 0 TC 2 Z9 2 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1360-7 J9 P SOC PHOTO-OPT INS PY 1993 VL 2089 BP 214 EP 215 PG 2 WC Spectroscopy SC Spectroscopy GA BZ89P UT WOS:A1993BZ89P00070 ER PT B AU MCCLELLAND, JF JONES, RW OCHIAI, S AF MCCLELLAND, JF JONES, RW OCHIAI, S BE Bertie, JE Wieser, H TI DEPTH PROFILING WITH STEP-SCAN FT-IR PHOTOACOUSTIC-SPECTROSCOPY SO 9TH INTERNATIONAL CONFERENCE ON FOURIER TRANSFORM SPECTROSCOPY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 9th International Conference on Fourier Transform Spectroscopy CY AUG 23-27, 1993 CL CALGARY, CANADA SP COBLENTZ SOC, UNIV CALGARY, DEPT CHEM, SPECTROSCOPY SOC CANADA C1 US DOE,AMES LAB,AMES,IA 50011. NR 0 TC 8 Z9 8 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1360-7 J9 P SOC PHOTO-OPT INS PY 1993 VL 2089 BP 302 EP 303 PG 2 WC Spectroscopy SC Spectroscopy GA BZ89P UT WOS:A1993BZ89P00114 ER PT B AU HAALAND, DM JONES, HDT AF HAALAND, DM JONES, HDT BE Bertie, JE Wieser, H TI MULTIVARIATE CALIBRATION APPLIED TO NEAR-INFRARED SPECTROSCOPY FOR THE QUANTITATIVE-ANALYSIS OF DILUTE AQUEOUS-SOLUTIONS SO 9TH INTERNATIONAL CONFERENCE ON FOURIER TRANSFORM SPECTROSCOPY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 9th International Conference on Fourier Transform Spectroscopy CY AUG 23-27, 1993 CL CALGARY, CANADA SP COBLENTZ SOC, UNIV CALGARY, DEPT CHEM, SPECTROSCOPY SOC CANADA C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 6 Z9 7 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1360-7 J9 P SOC PHOTO-OPT INS PY 1993 VL 2089 BP 448 EP 449 PG 2 WC Spectroscopy SC Spectroscopy GA BZ89P UT WOS:A1993BZ89P00187 ER PT J AU CHEN, J CHRISTIANSEN, J GEORGE, SJ VANELP, J TITTSWORTH, R HALES, BJ ALAHMAD, S COUCOUVANIS, D CAMPOBASSO, N BOLIN, JT CRAMER, SP AF CHEN, J CHRISTIANSEN, J GEORGE, SJ VANELP, J TITTSWORTH, R HALES, BJ ALAHMAD, S COUCOUVANIS, D CAMPOBASSO, N BOLIN, JT CRAMER, SP TI EXTENDED X-RAY-ABSORPTION FINE-STRUCTURE AND L-EDGE SPECTROSCOPY OF NITROGENASE MOLYBDENUM IRON PROTEIN SO ACS SYMPOSIUM SERIES LA English DT Review ID COFACTOR; SITE; EXAFS AB Molybdenum K-edge EXAFS of lyophilized nitrogenase provided the first spectroscopic evidence for a Mo-Fe-S cluster, and since then experiments have been done on solutions, crystals, and extracted cofactors. The Mo EXAFS data suggest a 4S/20(N) or 3S/30(N) Mo site, with 3-4 Fe at approximately 2.7 angstrom. Mo L-edge spectra are compatible with Mo(III) or Mo(IV). More recent Av1 Fe EXAFS reveals not only 2.65 and 3.8 angstrom Fe-Fe interactions, but Fe-S features at 4.3 angstrom. second shell Mo-Fe interaction at approximately 5 angstrom is also observed in new Mo EXAFS data. The EXAFS distances are consistent with recent crystallographic models for the M-center, and all of the interactions can be assigned. Using new soft x-ray beamlines and detectors, nitrogenase Fe L-edge spectra have also been obtained and interpreted as evidence for both Fe(II) and Fe(III). Changes are evident upon dye oxidation. X-ray magnetic circular dichroism offers the prospect of a new generation of nitrogenase experiments. C1 UNIV CALIF DAVIS,DEPT APPL SCI,DAVIS,CA 95616. LOUISIANA STATE UNIV,DEPT CHEM,BATON ROUGE,LA 70803. UNIV MICHIGAN,DEPT CHEM,ANN ARBOR,MI 48109. PURDUE UNIV,DEPT BIOL SCI,W LAFAYETTE,IN 47907. RP CHEN, J (reprint author), LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,BERKELEY,CA 94720, USA. NR 14 TC 4 Z9 4 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0097-6156 J9 ACS SYM SER PY 1993 VL 535 BP 231 EP 242 PG 12 WC Chemistry, Multidisciplinary SC Chemistry GA LZ852 UT WOS:A1993LZ85200015 ER PT J AU WOODWARD, J KORAN, LJ HERNANDEZ, LJ STEPHAN, LM AF WOODWARD, J KORAN, LJ HERNANDEZ, LJ STEPHAN, LM TI USE OF IMMOBILIZED BETA-GLUCOSIDASE IN THE HYDROLYSIS OF CELLULOSE SO ACS SYMPOSIUM SERIES LA English DT Review ID FUNGAL AB The supplementation of commercially produced Trichoderma reesei cellulases with beta-glucosidases, which possess high specific activity toward cellobiose, should prove useful for increasing the rate and extent of the hydrolysis of cellulosic substrates. Since cellobiose is soluble, beta-glucosidase could be used in an immobilized form and subsequently recovered and reused. We have prepared an immobilized beta-glucosidase (Aspergillus niger) by its entrapment within maintenance-free propylene glycol alginate/bone gelatin spheres. The enzyme thus immobilized is thermally stable at 40-degrees-C for several months, during which time it can be used for the continuous hydrolysis of cellobiose without loss of efficiency. The data indicate there is no loss of beta-glucosidase activity due to its leakage from the spheres. These biocatalytic spheres can also be dried (which makes them suitable for transporting) and subsequently rehydrated several times without any loss in catalytic activity. They have been used to supplement a commercial cellulase preparation for the hydrolysis of newsprint, recovered from the reaction mixture, and reused nine times without appreciable loss in activity or conversion of cellulose to glucose. C1 UNIV WISCONSIN,DEPT CHEM,STEVENS POINT,WI 54481. UNIV PUERTO RICO,DEPT CHEM ENGN,MAYAGUEZ,PR 00680. KASHUNIMIUT SCH,CHEVAK,AK 99563. RP WOODWARD, J (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831, USA. NR 15 TC 7 Z9 9 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0097-6156 J9 ACS SYM SER PY 1993 VL 533 BP 240 EP 250 PG 11 WC Chemistry, Multidisciplinary SC Chemistry GA LX111 UT WOS:A1993LX11100016 ER PT J AU LAZAGA, MA WICKHAM, DT PARKER, DH KASTANAS, GN KOEL, BE AF LAZAGA, MA WICKHAM, DT PARKER, DH KASTANAS, GN KOEL, BE TI REACTIVITY OF OXYGEN ADATOMS ON THE AU(111) SURFACE SO ACS SYMPOSIUM SERIES LA English DT Review ID CARBON-MONOXIDE; ATOMIC OXYGEN; ADSORPTION; AG(110); WATER; OXIDATION; H2O; CHEMISTRY; ACIDITIES; HYDROGEN AB The adsorption and reaction Of CO, CO2, NO2, H2O, CH3OH, and C2H4 were studied on clean and oxygen-precovered Au(111) surfaces. High coverages of oxygen adatoms, THETA(O), up to one monolayer were formed under clean, UHV conditions by exposure of Au(111) to ozone. Neither CO nor CO2 adsorbed on clean or oxygen-precovered Au(111) surfaces, but the CO oxidation reaction occurs readily at low temperatures. The Langmuir-Hinshelwood (LH) mechanism was found to be in operation over the entire range of oxygen coverage; we observed negative apparent activation energies (E(app) = - 2.5 kcal/mol) with no strong dependence on oxygen coverage. The activation of NO2, H2O, CH3OH, and C2H4 by oxygen adatoms on Au(111) is also discussed and compared to Au(110). We find that H2O and C2H4 are unreactive at low temperatures, and CH3OH has an intermediate reactivity, being less reactive than CO. C1 TDA RES,WHEAT RIDGE,CO 80033. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. RP LAZAGA, MA (reprint author), UNIV SO CALIF,DEPT CHEM,LOS ANGELES,CA 90089, USA. RI Koel, Bruce/H-3857-2013 OI Koel, Bruce/0000-0002-0032-4991 NR 26 TC 56 Z9 56 U1 0 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0097-6156 J9 ACS SYM SER PY 1993 VL 523 BP 90 EP 109 PG 20 WC Chemistry, Multidisciplinary SC Chemistry GA KZ556 UT WOS:A1993KZ55600008 ER PT J AU BLYSTONE, PG JOHNSON, MD HAAG, WR DALEY, PF AF BLYSTONE, PG JOHNSON, MD HAAG, WR DALEY, PF TI ADVANCED ULTRAVIOLET FLASH LAMPS FOR THE DESTRUCTION OF ORGANIC CONTAMINANTS IN AIR SO ACS SYMPOSIUM SERIES LA English DT Review ID WATER; CHEMISTRY AB This chapter describes a new process for photo-oxidation of volatile organic compounds (VOCs) in air using an advanced ultraviolet source, a xenon flashlamp. The flashlamps have greater output at 200 - 250 nm than medium-pressure mercury lamps at the same power and therefore cause much more rapid direct photolysis of VOCs. The observation of quantum efficiencies greater than unity indicate the involvement of chain reactions for trichloroethene (TCE), perchloroethene (PCE), 1,1-dichloroethene (DCE), chloroform, and methylene chloride. A full scale air emission control system (>95% removal) for TCE has been constructed, capable of continuous treatment of at least 300 scfm with a residence time of about 2 seconds. Further treatment of photo-oxidation products is likely to be needed for chloroethenes. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP BLYSTONE, PG (reprint author), PURUS INC,2713 N 1ST ST,SAN JOSE,CA 95134, USA. NR 20 TC 6 Z9 6 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0097-6156 J9 ACS SYM SER PY 1993 VL 518 BP 380 EP 392 PG 13 WC Chemistry, Multidisciplinary SC Chemistry GA KR023 UT WOS:A1993KR02300018 ER PT J AU KRAUSE, TR HELT, JE AF KRAUSE, TR HELT, JE TI CHEMICAL DETOXIFICATION OF TRICHLOROETHYLENE AND 1,1,1-TRICHLOROETHANE IN A MICROWAVE-DISCHARGE PLASMA REACTOR AT ATMOSPHERIC-PRESSURE SO ACS SYMPOSIUM SERIES LA English DT Review ID INCINERATION; HYDROCARBONS AB Microwave discharge plasma technology is a potential alternative to traditional incineration for the chemical detoxification of low concentrations of chlorinated hydrocarbons in vapor streams. To assess this potential, we have investigated the reactions of trichloroethylene and 1,1,1-trichloroethane with water vapor or molecular oxygen in an argon discharge at atmospheric pressure. Experiments have been conducted in a microwave discharge plasma contained in a tubular flow reactor. Destruction removal efficiencies ranging from 95 to >99% are observed. For the reaction with water vapor, analyses of the effluent stream indicated the primary products are CO2, CO, H-2, and HCl, with lesser amounts of unreacted parent compound and soot. For the reaction with molecular oxygen, the primary products are CO2 and HCl, with lesser amounts of unreacted parent compound, CO, H2O, and unidentified chlorinated hydrocarbons. RP KRAUSE, TR (reprint author), ARGONNE NATL LAB,DIV CHEM TECHNOL,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 23 TC 2 Z9 2 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0097-6156 J9 ACS SYM SER PY 1993 VL 518 BP 393 EP 410 PG 18 WC Chemistry, Multidisciplinary SC Chemistry GA KR023 UT WOS:A1993KR02300019 ER PT J AU APEL, WA DUGAN, PR WIEBE, MR JOHNSON, EG WOLFRAM, JH ROGERS, RD AF APEL, WA DUGAN, PR WIEBE, MR JOHNSON, EG WOLFRAM, JH ROGERS, RD TI BIOPROCESSING OF ENVIRONMENTALLY SIGNIFICANT GASES AND VAPORS WITH GAS-PHASE BIOREACTORS - METHANE, TRICHLOROETHYLENE, AND XYLENE SO ACS SYMPOSIUM SERIES LA English DT Review ID METHYLOSINUS-TRICHOSPORIUM OB3B; HYDROCARBONS; DEGRADATION; BACTERIA; BIODEGRADATION AB Fixed thin film, gas/vapor phase bioreactors were assessed relative to their potential for the bioprocessing of methane, trichloroethylene (TCE), and p-xylene. Methanotrophic bacteria were used to process the methane and TCE while a xylene resistant strain of Pseudomonas putida was used to process the p-xylene. Comparisons between the gas phase bioreactors and conventional shaken cultures and sparged liquid bioreactors showed that the gas phase bioreactors offer advantages over the other two systems for the degradation of methane in air. Rates of methane removal with the gas phase bioreactors were 2.1 and 1.6 fold greater than those exhibited by the shaken cultures and sparged liquid bioreactors, respectively. The gas phase bioreactors were shown to have application for the removal of TCE vapors from air with a removal rate of approximately 9 mug TCE d-1 bioreactor-1. Xylene vapors were also scrubbed from air using gas phase bioreactors. At a feed rate of 140 mug of xylene min-1, approximately 46% of the xylene was mineralized to carbon dioxide in a single pass through a bench scale gas phase bioreactor. RP APEL, WA (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,CTR BIOL PROC TECHNOL,IDAHO FALLS,ID 83401, USA. NR 15 TC 3 Z9 3 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0097-6156 J9 ACS SYM SER PY 1993 VL 518 BP 411 EP 428 PG 18 WC Chemistry, Multidisciplinary SC Chemistry GA KR023 UT WOS:A1993KR02300020 ER PT J AU HICKMAN, RG FARMER, JC WANG, FT AF HICKMAN, RG FARMER, JC WANG, FT TI MEDIATED ELECTROCHEMICAL PROCESS FOR HAZARDOUS-WASTE DESTRUCTION SO ACS SYMPOSIUM SERIES LA English DT Review AB There are few permitted processes for mixed waste (radioactive plus chemically hazardous) treatment. We are developing an electrochemical process, based upon mediated electrochemical oxidation (MEO), that converts toxic organic components of mixed waste to water, carbon dioxide, and chloride or chloride precipitates. Aggressive oxidizer ions such as Ag2+, Co3+, or Fe3+ are produced at an anode. These can attack organic molecules directly, and may also produce hydroxyl free radicals that promote destruction. Solid and liquid radioactive waste streams containing only inorganic radionuclide forms may be treated with existing technology and prepared for final disposal. The coulombic efficiency of the process has been determined, as well as the destruction efficiency for ethylene glycol, a surrogate waste. In addition, hazardous organic materials are becoming very expensive to dispose of and when they are combined with transuranic radioactive elements no processes are presently permitted. Mediated electrochemical oxidation is an ambient-temperature aqueous-phase process that can be used to oxidize organic components of mixed wastes. Problems associated with incineration, such as high-temperature volatilization of radionuclides, are avoided. Historically, Ag(II) has been used as a mediator in this process. Fe(III) and Co(III) are attractive alternatives to Ag(II) since they form soluble chlorides during the destruction of chlorinated solvents. Furthermore, silver itself is toxic heavy metal. Quantitative data have been obtained for the complete oxidation of ethylene glycol by Fe(III) and Co(III). Though ethylene glycol is a nonhalogenated organic, these data have enabled us to make direct comparisons of activities of Fe(III) and Co(III) with Ag(II). Very good quantitative data for the oxidation of ethylene glycol by Ag(II) had already been collected. RP HICKMAN, RG (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 6 TC 5 Z9 5 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0097-6156 J9 ACS SYM SER PY 1993 VL 518 BP 430 EP 438 PG 9 WC Chemistry, Multidisciplinary SC Chemistry GA KR023 UT WOS:A1993KR02300021 ER PT J AU KALB, PD HEISER, JH COLOMBO, P AF KALB, PD HEISER, JH COLOMBO, P TI LONG-TERM DURABILITY OF POLYETHYLENE FOR ENCAPSULATION OF LOW-LEVEL RADIOACTIVE, HAZARDOUS, AND MIXED WASTES SO ACS SYMPOSIUM SERIES LA English DT Review AB The durability of polyethylene waste forms for treatment of low-level radioactive, hazardous, and mixed wastes is examined. Specific potential failure mechanisms investigated include biodegradation, radiation, chemical attack, flammability, environmental stress cracking, and photodegradation. These data are supported by results from waste form performance testing including compressive yield strength, water immersion, thermal cycling, leachability of radioactive and hazardous species, irradiation, biodegradation, and flammability. Polyethylene was found to be extremely resistant to each of these potential failure modes under anticipated storage and disposal conditions. RP KALB, PD (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 21 TC 1 Z9 1 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0097-6156 J9 ACS SYM SER PY 1993 VL 518 BP 439 EP 449 PG 11 WC Chemistry, Multidisciplinary SC Chemistry GA KR023 UT WOS:A1993KR02300022 ER PT J AU BAKER, JO HIMMEL, ME AF BAKER, JO HIMMEL, ME TI THERMAL AND PH STRESS IN THERMAL-DENATURATION OF TRICHODERMA-REESEI CELLOBIOHYDROLASE-I - SUPPORTING EVIDENCE FOR A 2-TRANSITION MODEL SO ACS SYMPOSIUM SERIES LA English DT Review ID DIFFERENTIAL SCANNING CALORIMETRY; CELLULOLYTIC ENZYMES; PROTEIN-STRUCTURE; CELLULASE; STRAIN-L27; DOMAINS; CORE AB The structure and thermal denaturation of Trichoderma reesei cellobiohydrolase I (CBH I) have been investigated using fluorescence, chemical modification, and differential scanning calorimetry (DSC) techniques. The results of both fluorescence-quenching with cesium ion and chemical modification with N-bromosuccinimide indicate that at least seven, and possibly eight, of the nine tryptophan residues in the CBH I catalytic core region are in ''exposed'' positions at or near the surface of the native molecule. A biphasic perturbation of the CBH I intrinsic fluorescence reveals that the CBH I core region is capable of binding more than one molecule of cellobiose and suggests that this additional bound molecule may be important for the stabilization of the core region against thermal denaturation. When the temperature of a solution of CBH I (pH 7.5 in 50 mM phosphate) is ramped through its denaturation zone (approximately 28-degrees-C - 48-degrees-C at this pH), a sharp, sigmoidal change, centered at approximately 36-degrees-C, is observed in the polarization of the tryptophan fluorescence of the protein. This polarization change precedes both the endothermic peak maximum (40.15-degrees-C) observed in DSC under the same conditions and the second (40.3-degrees-C) and larger of two component peaks invoked to explain the asymmetrical shape of the DSC peak. The midpoint of the fluorescence polarization change is much more closely correlated with the first (37.2-degrees-C) and smaller of the deconvoluted component peaks. The fluorescence-polarization data thus provide supporting evidence for the component transitions, the existence of which has heretofore rested only on mathematical inference, and thereby for the two-transition model proposed earlier for the denaturation. RP BAKER, JO (reprint author), NATL RENEWABLE ENERGY LAB,DIV ALTERNAT FUELS,APPL BIOL SCI BRANCH,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 28 TC 2 Z9 2 U1 2 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0097-6156 J9 ACS SYM SER PY 1993 VL 516 BP 83 EP 101 PG 19 WC Chemistry, Multidisciplinary SC Chemistry GA KH054 UT WOS:A1993KH05400006 ER PT J AU STEINBERG, M AF STEINBERG, M TI TREATMENT OF MUNICIPAL SOLID-WASTE BY THE HYDROCARB PROCESS SO ACS SYMPOSIUM SERIES LA English DT Review AB The HYDROCARB Process addresses the problem of converting municipal solid waste (MSW) to a clean useable fuel for boilers and heat engines. The process consists of hydrogenation of the biomass to produce methane, followed by decomposition of the methane to carbon and hydrogen and combining the CO and H-2 to produce methanol and recycling the hydrogen-rich process gas. Using natural gas to make up the mass balance, the economics looks attractive for a 3,000 T/D MSW plant, especially when avoidance costs are taken into account. The process is environmentally attractive since processing is performed in a highly reducing atmosphere and at elevated pressure and temperatures where no toxic gases are expected and CO2 emission is minimized. RP STEINBERG, M (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV PROC SCI,UPTON,NY 11973, USA. NR 2 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0097-6156 J9 ACS SYM SER PY 1993 VL 515 BP 72 EP 77 PG 6 WC Chemistry, Multidisciplinary SC Chemistry GA KJ587 UT WOS:A1993KJ58700006 ER PT J AU PFUND, DM COCHRAN, HD AF PFUND, DM COCHRAN, HD TI CHEMICAL-POTENTIALS IN TERNARY SUPERCRITICAL FLUID MIXTURES SO ACS SYMPOSIUM SERIES LA English DT Review ID COMPUTER-SIMULATION; FREE-ENERGY; SOLUBILITY; EQUATION; DILUTE AB The solubility of a solute in a supercritical fluid can be greatly enhanced by adding an appropriate co-solvent or entrainer. We have explored this solubility enhancement at a molecular level using integral equation theory. With a method we developed previously, based on scaled particle theory (SPT), we are able to estimate the chemical potential of a solute from molecular distribution functions calculated from the hybrid mean spherical approximation. A multistep charging process permits a separate determination of the effects of short-ranged repulsive and long-ranged attractive interactions on the chemical potential. The SPT-based method provides a means of explaining how a small concentration of a third component can greatly alter the chemical potential, and therefore the solubility, of a solute in a supercritical solvent. C1 OAK RIDGE NATL LAB, DIV CHEM TECHNOL, OAK RIDGE, TN 37831 USA. RP PFUND, DM (reprint author), PACIFIC NW LAB, DEPT CHEM SCI, RICHLAND, WA 99352 USA. NR 38 TC 6 Z9 6 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0097-6156 J9 ACS SYM SER PY 1993 VL 514 BP 149 EP 157 PG 9 WC Chemistry, Multidisciplinary SC Chemistry GA KL230 UT WOS:A1993KL23000012 ER PT J AU PFUND, DM FULTON, JL SMITH, RD AF PFUND, DM FULTON, JL SMITH, RD TI AGGREGATION OF METHANOL IN SUPERCRITICAL FLUIDS - A MOLECULAR-DYNAMICS STUDY SO ACS SYMPOSIUM SERIES LA English DT Review ID INTERMOLECULAR POTENTIAL FUNCTIONS; INCLUDING INTERNAL-ROTATION; INTERACTION SITE MODELS; LIQUID METHANOL; COMPUTER-SIMULATION; CARBON-DIOXIDE; QUANTUM; MIXTURES; SYSTEMS; WATER AB Variations in solvent properties greatly alter the equilibrium between nonhydrogen bonded monomer and various hydrogen bonded species. Molecular dynamics simulations were performed for model supercritical binary mixtures of methanol in ethane and carbon dioxide. The effects of variations in solvent type, density, and concentration on methanol aggregation and n-mer equilibria were examined. A closed ring pentamer was found to be a favored structure in carbon dioxide. Increasing the density of the solvent resulted in a shift in the equilibrium towards the pentamer. At constant pressure, methanol aggregates were larger in ethane than in carbon dioxide, aggregates of six or more methanol molecules being common in ethane. Results from the simulations to determine the fraction of methanol in monomer form were found to be in qualitative agreement with experimental results. RP PFUND, DM (reprint author), PACIFIC NW LAB, DEPT CHEM SCI, CHEM METHODS & SEPARAT GRP, RICHLAND, WA 99352 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 25 TC 8 Z9 8 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0097-6156 J9 ACS SYM SER PY 1993 VL 514 BP 158 EP 174 PG 17 WC Chemistry, Multidisciplinary SC Chemistry GA KL230 UT WOS:A1993KL23000013 ER PT J AU FULTON, JL YEE, GG SMITH, RD AF FULTON, JL YEE, GG SMITH, RD TI HYDROGEN-BONDING OF SIMPLE ALCOHOLS IN SUPERCRITICAL FLUIDS - AN FTIR STUDY SO ACS SYMPOSIUM SERIES LA English DT Review ID REVERSE MICELLES; CARBON-DIOXIDE; PHASE; ASSOCIATION; METHANOL; PROPANE; ETHANE AB FT-IR spectroscopy has been used to measure the degree of intermolecular hydrogen bonding between solute molecules of simple alcohols (methanol to dodecanol) in supercritical carbon dioxide and supercritical ethane. In these fluids an equilibrium is established between the free nonhydrogen bonded monomer and the various hydrogen bonded species, of which the tetrameric and pentameric species are believed to predominate at lower mole fractions of the alcohol. The fluid pressure, temperature, and the alcohol concentration significantly affect the equilibrium distribution of the monomer and oligomeric species. Both supercritical and sub-critical binary solutions containing up to 0.10 mole fraction alcohol were examined under conditions ranging from 200 to 400 bar and 40-degrees-C. The spectral data support the existence of a weak complex between the alcohol monomer and carbon dioxide. RP FULTON, JL (reprint author), PACIFIC NW LAB, DEPT CHEM SCI, CHEM METHODS & SEPARAT GRP, RICHLAND, WA 99352 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 22 TC 16 Z9 16 U1 2 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0097-6156 J9 ACS SYM SER JI ACS Symp. Ser. PY 1993 VL 514 BP 175 EP 187 PG 13 WC Chemistry, Multidisciplinary SC Chemistry GA KL230 UT WOS:A1993KL23000014 ER PT J AU LEE, LL COCHRAN, HD AF LEE, LL COCHRAN, HD TI ADSORPTION FROM SUPERCRITICAL FLUIDS SO ACS SYMPOSIUM SERIES LA English DT Review ID LIQUID-VAPOR INTERFACE; PERCUS-YEVICK; MONTE-CARLO; HARD-WALL; EQUATION AB Many important processes with supercritical (SC) fluids involve adsorption from SC fluids or desorption into SC fluids; examples include, regeneration of sorbents with SC fluids, SC fluid chromatography, and SC fluid extraction of hazardous chemicals from contaminated soils. In this work we initiate a fundamental, molecular-based study of adsorption from and desorption into SC fluids. Equilibrium properties and fluid structures in the vicinity of the surface (W) are explored using integral equation theory. First, the equilibrium properties of a pure fluid A near W are studied as the fluid state approaches the critical point (CP); both attractive and repulsive A-W interactions are explored. Subsequently, the behavior of a dilute solute B (i.e., system A+B+W) in the vicinity of W will be described under conditions where the solvent A approaches its CP. We examine the degree of preferential adsorption of B vis-a-vis attractive or repulsive interactions with A and W. The molecular mechanisms of SC adsorption are determined. The computational challenge of these calculations was considerable, and the necessarily limited range of the calculated correlation functions has resulted in useful qualitative, if not quantitative, information. C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. RP LEE, LL (reprint author), UNIV OKLAHOMA,DEPT CHEM ENGN & MAT SCI,100 E BOYD ST,NORMAN,OK 73019, USA. NR 17 TC 1 Z9 1 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0097-6156 J9 ACS SYM SER PY 1993 VL 514 BP 188 EP 200 PG 13 WC Chemistry, Multidisciplinary SC Chemistry GA KL230 UT WOS:A1993KL23000015 ER PT J AU ZEMANIAN, TS FULTON, JL SMITH, RD AF ZEMANIAN, TS FULTON, JL SMITH, RD TI DYNAMIC FLUORESCENCE QUENCHING IN REVERSE MICROEMULSIONS IN PROPANE SO ACS SYMPOSIUM SERIES LA English DT Review ID OIL MICROEMULSIONS; KINETIC-MODEL; DROPLETS; WATER; EXCHANGE AB Measurements have been made of micelle size and core exchange rates of reverse (water-in-oil) micellar systems of sodium bis-(2-ethylhexyl) sulfosuccinate (AOT) or didodecyldimethyl ammonium bromide (DDAB) and water in propane at various pressures and temperatures. Ruthenium tris(bipyridyl) dichloride, soluble in the aqueous phase, was used as a fluorescent probe to determine surfactant aggregation numbers, and hence water core radii. Potassium ferricyanide was used as the water-soluble quencher in these experiments. Pressure and temperature effects are discussed as they pertain to bulk oil phase and surfactant properties. RP ZEMANIAN, TS (reprint author), PACIFIC NW LAB, DEPT CHEM SCI, CHEM METHODS & SEPARAT GRP, POB 999, RICHLAND, WA 99352 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 12 TC 3 Z9 3 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0097-6156 J9 ACS SYM SER PY 1993 VL 514 BP 258 EP 270 PG 13 WC Chemistry, Multidisciplinary SC Chemistry GA KL230 UT WOS:A1993KL23000020 ER PT J AU DELLORCO, PC GLOYNA, EF BUELOW, S AF DELLORCO, PC GLOYNA, EF BUELOW, S TI OXIDATION PROCESSES IN THE SEPARATION OF SOLIDS FROM SUPERCRITICAL WATER SO ACS SYMPOSIUM SERIES LA English DT Review ID PRESSURE PHASE-EQUILIBRIA; PVT-DATA; SYSTEM; 673-K; BARS AB Salt precipitation and removal from supercritical water solutions were studied with a salt separator operating between 400-degrees-C and 511-degrees-C at 29.8 MPa. Nitrate, chloride, sulfate, and bicarbonate salts of sodium were studied. The behavior of cesium was investigated, and the fate and behavior of corrosion products were assessed. Above 500-degrees-C, sulfate and chloride salts were separated near their solubility limits, while sodium nitrate was removed with efficiencies greater than 96%. C1 LOS ALAMOS NATL LAB,DIV CHEM & LASER SCI,LOS ALAMOS,NM 87545. RP DELLORCO, PC (reprint author), UNIV TEXAS,AUSTIN,TX 78712, USA. NR 26 TC 8 Z9 8 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0097-6156 J9 ACS SYM SER PY 1993 VL 514 BP 314 EP 326 PG 13 WC Chemistry, Multidisciplinary SC Chemistry GA KL230 UT WOS:A1993KL23000025 ER PT J AU GAO, Y COPPENS, P COX, DE MOODENBAUGH, AR AF GAO, Y COPPENS, P COX, DE MOODENBAUGH, AR TI COMBINED X-RAY SINGLE-CRYSTAL AND NEUTRON POWDER REFINEMENT OF MODULATED STRUCTURES AND APPLICATION TO THE INCOMMENSURATELY MODULATED STRUCTURE OF BI2SR2CACU2O8+Y SO ACTA CRYSTALLOGRAPHICA SECTION A LA English DT Article ID CU-O SUPERCONDUCTOR; OXYGEN NONSTOICHIOMETRY; PHYSICAL-PROPERTIES; DIFFRACTION DATA; SYNCHROTRON; PARAMETERS; PHASE AB A method is described for the refinement of modulated structures from a combined set of single-crystal and powder diffraction data or from powder data only. The method is especially useful when information on light atoms is to be obtained and no single crystals of suitable size for neutron diffraction are available. The program in which the method is encoded allows for differences in composition between the single-crystal and powder samples. Application to the incommensurately modulated superconductor Bi2Sr2CaCu2O8+y (2212) using powder neutron and single-crystal X-ray data confirms that the oxygen modulation in the Bi-O layer is saw-tooth-like, as observed in the preceding study based solely on X-ray data [Petricek, Gao, Lee & Coppens (1990). Phys. Rev. B, 42,387-392], but with improved accuracy in the resulting parameters. The extra oxygen content is explicitly related to the modulation model and corresponds to 0.14 (4) per formula unit. With the refined site occupancies for the heavy atoms and the results of an anomalous-scattering study on the bismuth distribution [Coppens, Lee, Gao & Sheu (1991). J. Phys. Chem. Solids, 52,1267-1272], a copper valency of 2.31 is obtained for the single-crystal sample. The powder value of 2.40 is somewhat less reliable as no anomalous-scattering data are available for the powder sample. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. RP GAO, Y (reprint author), SUNY BUFFALO,DEPT CHEM,BUFFALO,NY 14214, USA. NR 31 TC 41 Z9 41 U1 0 U2 2 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0108-7673 J9 ACTA CRYSTALLOGR A JI Acta Crystallogr. Sect. A PD JAN 1 PY 1993 VL 49 BP 141 EP 148 DI 10.1107/S010876739200552X PN 1 PG 8 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA KK211 UT WOS:A1993KK21100018 ER PT J AU GUPTA, G MASSOUDI, M AF GUPTA, G MASSOUDI, M TI FLOW OF A GENERALIZED 2ND-GRADE FLUID BETWEEN HEATED PLATES SO ACTA MECHANICA LA English DT Article ID NON-NEWTONIAN FLUID; NATURAL-CONVECTION FLOW; STABILITY AB We examine the fully developed flow of a generalized fluid of second grade between heated parallel plates, due to a pressure gradient along the plate. The constant coefficient of shear viscosity of a fluid of second grade is replaced by a shear dependent viscosity with an exponent m. If the normal stress coefficients are set equal to zero, this model reduces to the standard power-law model. We obtain the solution for the case when the temperature changes only in the direction normal to the plates for the two most commonly used viscosity models, i.e. (i) when the viscosity does not depend on temperature, and (ii) when the viscosity is an exponentially decaying function of temperature. C1 US DOE,PITTSBURGH ENERGY TECHNOL CTR,PITTSBURGH,PA 15236. RP GUPTA, G (reprint author), UNIV PITTSBURGH,DEPT MECH ENGN,PITTSBURGH,PA 15261, USA. NR 20 TC 39 Z9 39 U1 1 U2 2 PU SPRINGER-VERLAG WIEN PI VIENNA PA SACHSENPLATZ 4-6, PO BOX 89, A-1201 VIENNA, AUSTRIA SN 0001-5970 J9 ACTA MECH JI Acta Mech. PY 1993 VL 99 IS 1-4 BP 21 EP 33 DI 10.1007/BF01177232 PG 13 WC Mechanics SC Mechanics GA LK575 UT WOS:A1993LK57500002 ER PT J AU MILLS, MJ MIRACLE, DB AF MILLS, MJ MIRACLE, DB TI THE STRUCTURE OF A(100) AND A(110) DISLOCATION CORES IN NIAL SO ACTA METALLURGICA ET MATERIALIA LA English DT Article ID SINGLE-CRYSTALS; SLIP SYSTEMS; ELECTRONIC-STRUCTURE; DEFORMATION; ALLOYS; GLIDE AB High resolution TEM has been used to observe the core structures of a[100] and a[110] edge dislocations in stoichiometric NiAl. The images indicate that the a[100] edge dislocations have large elastic strain fields but the cores are non-dissociated.Two core structures for the a[110] edge dislocations have been observed. One configuration is climb dissociated into two a/2[111] partial dislocations which are about 1.0 nm apart. These partial dislocations are linked by an anti-phase boundary (APB) which lies normal to the glide plane. In the second configuration, the a[110] core is decomposed into two a[100] dislocations. The implications of these observed core configurations are discussed with respect to dislocation mobility and the macroscopic flow behavior of NiAl. C1 USAF, WRIGHT LAB, WRIGHT PATTERSON AFB, OH 45433 USA. RP MILLS, MJ (reprint author), SANDIA NATL LABS, LIVERMORE, CA 94550 USA. RI Wagner, Martin/A-6880-2008 NR 49 TC 61 Z9 61 U1 1 U2 9 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0956-7151 J9 ACTA METALL MATER JI Acta Metall. Mater. PD JAN PY 1993 VL 41 IS 1 BP 85 EP 95 DI 10.1016/0956-7151(93)90341-O PG 11 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA KC727 UT WOS:A1993KC72700008 ER PT J AU NISHIMURA, C LIU, CT AF NISHIMURA, C LIU, CT TI REACTIVE SINTERING OF NI3AL UNDER COMPRESSION SO ACTA METALLURGICA ET MATERIALIA LA English DT Article ID INTERMETALLIC REACTION-RATES; GASLESS COMBUSTION; NICKEL-ALUMINIDE; FULL DENSITY; TEMPERATURE; PROPAGATION; SOLIDS AB Reactive sintering of Ni3Al was performed with uniaxial compressive stresses ranging from 0 to 120 MPa, using elemental powders with the stoichiometric composition preheated to 620-degrees-C in a vacuum of 7 x 10(-3) Pa, It was shown that both compressive stress and heat flow strongly affected the reaction process and, hence, the structure and density of reaction-sintered products. Without compression, reaction-sintered products had a relative density up to 98% and were mainly composed of Ni3Al with uniformly distributed fine pores and large shrinkage cavities located in the center. Green density has little effect on densification. There was no effect from a compressive stress when it was applied to specimens after the onset of the self-sustaining reaction. When a green compact self-ignited under a pre-loaded compressive stress (50 MPa), a highly densified product (relative density as much as 99.3%) was obtained. In addition, the product, which was composed of Ni3Al, NiAl and Ni, did not contain large shrinkage cavities. A detailed description of the entire reaction process is given on the basis of electron probe microanalyses and thermodynamic considerations. C1 OAK RIDGE NATL LAB, DIV MET & CERAM, OAK RIDGE, TN 37831 USA. OI Liu, Chain Tsuan/0000-0001-7888-9725 NR 30 TC 76 Z9 77 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0956-7151 J9 ACTA METALL MATER JI Acta Metall. Mater. PD JAN PY 1993 VL 41 IS 1 BP 113 EP 120 DI 10.1016/0956-7151(93)90343-Q PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA KC727 UT WOS:A1993KC72700010 ER PT J AU STRAND, SE STRANDH, M SPANNE, P AF STRAND, SE STRANDH, M SPANNE, P TI ELECTRON-MICROSCOPY AND COMPUTED MICROTOMOGRAPHY STUDIES OF IN-VIVO IMPLANTED MINI-TL DOSIMETERS SO ACTA ONCOLOGICA LA English DT Article; Proceedings Paper CT 3rd Scandinavian Symposium on Radiolabeled Monoclonal Antibodies for Cancer Diagnosis and Therapy CY OCT 30-31, 1992 CL HELSINKI, FINLAND ID QUANTITATIVE SPECT; RADIOIMMUNOTHERAPY; THERAPY; TUMORS AB The need for direct methods of measuring the absorbed dose in vivo increases for systemic radiation therapy, and in more sophisticated methodologies developed for radioimmunotherapy. One method suggested is the use of mini-thermoluminescent dosimeters (TLD). Recent reports indicate a marked loss of signal when the dosimeters are used in vivo. We investigated the exterior surface of the dosimeters with scanning electron microscopy and the interior dosimeter volume with computed microtomography. The results show that the dosimeters initially have crystals uniformly embedded in the teflon matrix, with some of them directly exposed to the environment. After incubation in gel, holes appear in the dosimeter matrix where the crystals should have been. The computed microtomographic images show that crystals remain in the interior of the matrix, producing the remaining signal. We conclude that these dosimeters should be very carefully handled, and for practical use of mini-TLDs in vivo the dosimeters should be calibrated in equivalent milieus. An alternative solution to the problem of decreased TL efficiency, would be to coat the dosimeters with a thin layer, of Teflon, or other suitable material C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. LUND UNIV,DEPT RADIAT PHYS,S-22101 LUND,SWEDEN. NR 17 TC 4 Z9 4 U1 0 U2 0 PU SCANDINAVIAN UNIVERSITY PRESS PI OSLO PA PO BOX 2959 TOYEN, JOURNAL DIVISION CUSTOMER SERVICE, N-0608 OSLO, NORWAY SN 0284-186X J9 ACTA ONCOL JI Acta Oncol. PY 1993 VL 32 IS 7-8 BP 787 EP 791 PG 5 WC Oncology SC Oncology GA MX595 UT WOS:A1993MX59500014 PM 8305228 ER PT J AU STRAND, SE IVANOVIC, M ERLANDSSON, K WEBER, DA FRANCESCHI, D BUTTON, T SJOGREEN, K AF STRAND, SE IVANOVIC, M ERLANDSSON, K WEBER, DA FRANCESCHI, D BUTTON, T SJOGREEN, K TI HIGH-RESOLUTION PINHOLE SPECT FOR TUMOR IMAGING SO ACTA ONCOLOGICA LA English DT Article; Proceedings Paper CT 3rd Scandinavian Symposium on Radiolabeled Monoclonal Antibodies for Cancer Diagnosis and Therapy CY OCT 30-31, 1992 CL HELSINKI, FINLAND ID EMISSION COMPUTED-TOMOGRAPHY; BRAIN-TUMORS; BETA-CAMERA AB High-resolution, non-invasive, 3D-imaging techniques would greatly benefit the investigation of the localization properties of tumor-specific radiopharmaceuticals in laboratory animals. The present study reports how pinhole SPECT can be applied to tumor localization studies in small laboratory animals to provide high resolution SPECT images in vivo. Pinhole SPECT was performed using a rotating scintillation camera, equipped with a pinhole collimator. The sensitivity of a 2 mm diameter collimator at 45 mm from the source is 90 cps/MBq for Tc-99m. The planar spatial resolution at a 45 mm distance is 2.2 mm. The transaxial spatial resolution, with a distance of 45 mm between the collimator aperture and the axis of rotation, is 3.1 mm. For SPECT imaging, spatial linearity is preserved across the usable field-of-view. The major advantage of the high resolution properties of pinhole tomography is demonstrated by the enhanced lesion-to-normal-brain uptake ratio achieved on tomographic slices as compared to planar images. For example, Tl-201 tumor-to-normal-brain uptake ratios of 1.1 to 1.3 observed on planar images, corresponded to ratios ranging from 3.2 to 3.7 on the SPECT slices. Examples of the activity distributions of two radiopharmaceuticals in tumor and in normal brain for sagittal and coronal images are given. In all cases, tumors are clearly delineated on the pinhole SPECT slices. The present study shows that pinhole SPECT performed with standard SPECT instrumentation can give high spatial resolution images, with a FWHM approximate to 3 mm and a sensitivity approximate to 100 cps/MBq for Tc-99m. C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. SUNY SB,STONY BROOK,NY. LUND UNIV,DEPT RADIAT PHYS,S-22101 LUND,SWEDEN. NR 13 TC 8 Z9 8 U1 0 U2 0 PU SCANDINAVIAN UNIVERSITY PRESS PI OSLO PA PO BOX 2959 TOYEN, JOURNAL DIVISION CUSTOMER SERVICE, N-0608 OSLO, NORWAY SN 0284-186X J9 ACTA ONCOL JI Acta Oncol. PY 1993 VL 32 IS 7-8 BP 861 EP 867 PG 7 WC Oncology SC Oncology GA MX595 UT WOS:A1993MX59500024 PM 8305237 ER PT J AU SWIATECKI, WJ AF SWIATECKI, WJ TI AN IMPROVED THOMAS-FERMI TREATMENT OF NUCLEI SO ACTA PHYSICA POLONICA B LA English DT Article; Proceedings Paper CT 27TH ZAKOPANE SCHOOL OF PHYSICS CY AUG 31-SEP 09, 1992 CL ZAKOPANE, POLAND SP POLISH STATE COMM SCI RES, NIEWODNICZANSKI INST NUCL PHYS, JAGIELLONIAN UNIV, INST PHYS RP SWIATECKI, WJ (reprint author), LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720, USA. NR 4 TC 1 Z9 1 U1 0 U2 0 PU POLISH ACAD SCIENCES INST PHYSICS PI WARSAW PA AL LOTNIKOW 32-46, 02-668 WARSAW, POLAND SN 0587-4254 J9 ACTA PHYS POL B JI Acta Phys. Pol. B PD JAN PY 1993 VL 24 IS 1 BP 229 EP 237 PG 9 WC Physics, Multidisciplinary SC Physics GA KP370 UT WOS:A1993KP37000014 ER PT J AU NOVAK, JM RHODES, OE SMITH, MH CHESSER, RK AF NOVAK, JM RHODES, OE SMITH, MH CHESSER, RK TI MORPHOLOGICAL ASYMMETRY IN MAMMALS - GENETICS AND HOMEOSTASIS RECONSIDERED SO ACTA THERIOLOGICA LA English DT Article; Proceedings Paper CT MEETING ON ECOLOGICAL GENETICS IN MAMMALS : CURRENT RESEARCH AND FUTURE PERSPECTIVES CY SEP, 1992 CL UNIV LODZ, LODZ, POLAND HO UNIV LODZ DE ASYMMETRY; HETEROZYGOSITY; DEVELOPMENTAL HOMEOSTASIS; GENETIC VARIABILITY ID CHEETAH ACINONYX-JUBATUS; DEVELOPMENTAL STABILITY; FLUCTUATING ASYMMETRY; NATURAL-POPULATIONS; SALMONID FISHES; SOREX-ARANEUS; RAINBOW-TROUT; COMMON SHREW; ENZYME LOCI; HETEROZYGOSITY AB It has been hypothesized that developmental stability is increased at higher levels of genetic variability (heterozygosity) in animals. However, the existence of this relationship is questionable for homeotherms in general and mammals in particular. The difference between the sides of a bilateral character in an individual is a measure of fluctuating asymmetry that can be used as a measure of the developmental stability of mammals. Increased developmental stability should result in a greater degree of similarity between the right and left side of the body even though environmental variability would tend to increase the differences between right and left sides of the body. It is necessary to separate the effects of the three types of asymmetry so that an accurate estimate of the variance attributable to fluctuating asymmetry can be made. In addition, many early studies of asymmetry in poikilotherms used meristic characters (such as scale counts), and these types of characters are not easily studied in mammals. Mammals, because of their precise regulation of body temperature show little phenotypic effect of environmental variability, and thus may exhibit low absolute levels of asymmetry. Mammals may also be able to reduce the level of asymmetry during their prolonged intrauterine development and juvenile growth period. The literature is reviewed relative to relationships between genetic variation and asymmetry in mammals. Hypotheses are reviewed as they relate to the relationship between fluctuating asymmetry and heterozygosity observed in previous studies. Finally, recommendations are put forth regarding the design and interpretation of future research into the relationship between developmental homeostasis and genetic variability. C1 UNIV GEORGIA,INST ECOL,DEPT GENET,ATHENS,GA 30602. UNIV GEORGIA,SCH FOREST RESOURCES,ATHENS,GA 30602. UNIV GEORGIA,DEPT ZOOL,ATHENS,GA 30602. RP NOVAK, JM (reprint author), UNIV GEORGIA,SAVANNAH RIVER ECOL LAB,BOX DRAWER E,AIKEN,SC 29802, USA. RI Martin, Samantha/F-5179-2011 NR 31 TC 27 Z9 27 U1 1 U2 5 PU POLISH ACAD SCIENCES PI BIALOWIEZA PA MAMMAL RESEARCH INST, 17-230 BIALOWIEZA, POLAND SN 0001-7051 J9 ACTA THERIOL JI Acta Theriol. PY 1993 VL 38 SU 2 BP 7 EP 18 PG 12 WC Zoology SC Zoology GA MK298 UT WOS:A1993MK29800002 ER PT J AU CHESSER, RK SUGG, DW RHODES, OE NOVAK, JM SMITH, MH AF CHESSER, RK SUGG, DW RHODES, OE NOVAK, JM SMITH, MH TI EVOLUTION OF MAMMALIAN SOCIAL-STRUCTURE SO ACTA THERIOLOGICA LA English DT Article; Proceedings Paper CT MEETING ON ECOLOGICAL GENETICS IN MAMMALS : CURRENT RESEARCH AND FUTURE PERSPECTIVES CY SEP, 1992 CL UNIV LODZ, LODZ, POLAND HO UNIV LODZ DE COANCESTRY; DISPERSAL; GROUP ADVANTAGE; SOCIAL BEHAVIOR ID TAILED PRAIRIE DOG; INBREEDING AVOIDANCE; GENETIC-VARIATION; DISPERSAL; POPULATIONS; PHILOPATRY; COMPETITION; DIVERSITY AB Social groups may be viewed as collections of individuals exhibiting nonindependent behavior and organized in a cooperative manner. The evolutionary advantage of social behavior to individuals must be measured in its relativity to other potential behaviors, the scale of competitive interactions, and under a variety of environmental and genetic constraints. A primary tenet of social evolution is that coancestry will promote the genes of related individuals. High values of coancestry, however, do not necessarily translate into evolutionary advantage unless the primary competitive interactions occur among the groups. Coancestry is affected by the breeding tactics within and rates of genetic exchange among social groups. Low rates of exchange among groups, regardless of breeding tactics, may result in high values for intragroup coancestry but may lead to inbreeding depression in progeny. Likewise, breeding tactics such as polygyny, may not impart any long-lasting evolutionary advantage if genetic exchange rates are high. The evolution of social organizations typified by different breeding and migration strategies is evaluated to determine the conditions necessary for various tactics to result in genetic contributions by individuals equal to those of monogamous mating systems. The models show that breeding and dispersal tactics have probably evolved in concert and predict that social-groups which are characterized by strong gene correlations are likely to exhibit relatively low group advantage for progeny survival and breeding. There is little impetus for high gene correlations to accrue in situations where group advantage is very high relative to monogamous systems. C1 SAVANNAH RIVER ECOL LAB,AIKEN,SC 29802. RP CHESSER, RK (reprint author), UNIV GEORGIA,DEPT GENET,ATHENS,GA 30602, USA. NR 36 TC 30 Z9 31 U1 0 U2 5 PU POLISH ACAD SCIENCES PI BIALOWIEZA PA MAMMAL RESEARCH INST, 17-230 BIALOWIEZA, POLAND SN 0001-7051 J9 ACTA THERIOL JI Acta Theriol. PY 1993 VL 38 SU 2 BP 163 EP 174 PG 12 WC Zoology SC Zoology GA MK298 UT WOS:A1993MK29800013 ER PT J AU JUNG, DR KING, DE CZANDERNA, AW AF JUNG, DR KING, DE CZANDERNA, AW BE Boerio, FJ TI XPS OF ORGANIZED MOLECULAR ASSEMBLY COPPER INTERFACES - HS(CH2)11OH/CU SO ADHESION SOCIETY PROCEEDINGS OF THE SIXTEENTH ANNUAL MEETING AND THE INTERNATIONAL SYMPOSIUM ON THE INTERPHASE LA English DT Proceedings Paper CT 16th Annual Meeting of the Adhesion-Society/International Symposium on the Interphase CY FEB 21-26, 1993 CL WILLIAMSBURG, VA SP ADHES SOC, USN, OFF NAVAL RES, NATL SCI FDN, USA, ARMY RES OFF, GORDON & BREACH SCI PUBL INC, LOCTITE CORP, DOW CHEM CO, ESSEX SPECIALTY CHEM CO, NATL STARCH & CHEM CO, ALLIED SIGNAL, S C JOHNSON WAX, FORD MOTOR CO, AIR PROD & CHEM CO, AMER VACUUM SOC, APPL SURFACE SCI DIV C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ADHESION SOCIETY PI BALTIMORE PA MARTIN MARIETTA LABORATORIES 1450 S ROLLING RD, BALTIMORE, MD 21227 PY 1993 BP 158 EP 161 PG 4 WC Engineering, Mechanical; Materials Science, Characterization & Testing; Materials Science, Coatings & Films; Materials Science, Composites; Polymer Science SC Engineering; Materials Science; Polymer Science GA BC38S UT WOS:A1993BC38S00052 ER PT B AU THOMPSON, TC MILLER, WO GIESKE, JH AF THOMPSON, TC MILLER, WO GIESKE, JH BE Chandra, T Dhingra, AK TI DEVELOPMENT OF ULTRATHIN, DIMENSIONALLY STABLE COMPOSITES FOR THE SUPERCONDUCTING SUPER COLLIDER (SSC) ELEMENTARY PARTICLE DETECTORS SO ADVANCED COMPOSITES '93: INTERNATIONAL CONFERENCE ON ADVANCED COMPOSITE MATERIALS LA English DT Proceedings Paper CT International Conference on Advanced Composite Materials (ICACM) - Advanced Composites 93 CY FEB 15-19, 1993 CL UNIV WOLLONGONG, WOLLONGONG, AUSTRALIA SP MINERALS MET & MAT SOC, PHYS MET COMM HO UNIV WOLLONGONG C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-251-5 PY 1993 BP 155 EP 161 PG 7 WC Materials Science, Composites SC Materials Science GA BA47E UT WOS:A1993BA47E00020 ER PT B AU BINER, SB AF BINER, SB BE Chandra, T Dhingra, AK TI HIGH-TEMPERATURE DEFORMATION CHARACTERISTICS OF DISCONTINUOUS FIBER-REINFORCED COMPOSITES SO ADVANCED COMPOSITES '93: INTERNATIONAL CONFERENCE ON ADVANCED COMPOSITE MATERIALS LA English DT Proceedings Paper CT International Conference on Advanced Composite Materials (ICACM) - Advanced Composites 93 CY FEB 15-19, 1993 CL UNIV WOLLONGONG, WOLLONGONG, AUSTRALIA SP MINERALS MET & MAT SOC, PHYS MET COMM HO UNIV WOLLONGONG C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-251-5 PY 1993 BP 1043 EP 1049 PG 7 WC Materials Science, Composites SC Materials Science GA BA47E UT WOS:A1993BA47E00155 ER PT B AU BINER, SB AF BINER, SB BE Chandra, T Dhingra, AK TI ROLE OF INTERFACES ON THE DUCTILE FRACTURE PROCESS OF DISCONTINUOUS FIBER-REINFORCED COMPOSITES SO ADVANCED COMPOSITES '93: INTERNATIONAL CONFERENCE ON ADVANCED COMPOSITE MATERIALS LA English DT Proceedings Paper CT International Conference on Advanced Composite Materials (ICACM) - Advanced Composites 93 CY FEB 15-19, 1993 CL UNIV WOLLONGONG, WOLLONGONG, AUSTRALIA SP MINERALS MET & MAT SOC, PHYS MET COMM HO UNIV WOLLONGONG C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-251-5 PY 1993 BP 1309 EP 1315 PG 7 WC Materials Science, Composites SC Materials Science GA BA47E UT WOS:A1993BA47E00195 ER PT B AU WILLIAMSON, RL DRAKE, JT AF WILLIAMSON, RL DRAKE, JT BE Chandra, T Dhingra, AK TI ASSESSING THERMAL RESIDUAL-STRESS REDUCTION FROM COMPOSITION GRADING AT MATERIAL INTERFACES - A NUMERICAL MODELING STUDY SO ADVANCED COMPOSITES '93: INTERNATIONAL CONFERENCE ON ADVANCED COMPOSITE MATERIALS LA English DT Proceedings Paper CT International Conference on Advanced Composite Materials (ICACM) - Advanced Composites 93 CY FEB 15-19, 1993 CL UNIV WOLLONGONG, WOLLONGONG, AUSTRALIA SP MINERALS MET & MAT SOC, PHYS MET COMM HO UNIV WOLLONGONG C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. NR 0 TC 1 Z9 1 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-251-5 PY 1993 BP 1361 EP 1367 PG 7 WC Materials Science, Composites SC Materials Science GA BA47E UT WOS:A1993BA47E00203 ER PT J AU WIND, RA MACIEL, GE BOTTO, RE AF WIND, RA MACIEL, GE BOTTO, RE TI QUANTITATION IN C-13 NMR-SPECTROSCOPY OF CARBONACEOUS SOLIDS SO ADVANCES IN CHEMISTRY SERIES LA English DT Review ID NUCLEAR MAGNETIC-RESONANCE; STATE NMR; HIGH-RESOLUTION; WHOLE COALS; POLARIZATION TRANSFER; CROSS POLARIZATION; PREMIUM COALS; CP MAS; RELIABILITY; SPECTRA AB This chapter provides an overview of the fundamental issues concerning quantitation in C-13 NMR spectroscopy of carbonaceous solids. General factors governing quantitation in solid-state C-13 NMR spectroscopy (such as sample heterogeneity, the presence of unpaired electron spins, interference of proton decoupling by molecular motion, magic-angle spinning (MAS) effects, and implementation of the proper recycle-delay time) are discussed together with those factors that play a major role in cross-polarization (CP) experiments (Hartmann-Hahn match, proton spin-locking, cross-polarization spin dynamics, and interference of cross-polarization from MAS). Technical aspects and requirements of the solid-state C-13 NMR experiment are outlined, and effective strategies to obtain the most reliable results are presented. C1 CHEMAGNET INC,FT COLLINS,CO 80525. COLORADO STATE UNIV,DEPT CHEM,FT COLLINS,CO 80523. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 66 TC 0 Z9 0 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-2393 J9 ADV CHEM SER JI Adv. Chem. Ser. PY 1993 IS 229 BP 3 EP 26 PG 24 WC Chemistry, Multidisciplinary SC Chemistry GA KG269 UT WOS:A1993KG26900001 ER PT J AU BOWMAN, MK AF BOWMAN, MK TI STRATEGIES FOR MEASUREMENT OF ELECTRON-SPIN RELAXATION SO ADVANCES IN CHEMISTRY SERIES LA English DT Review ID ENVELOPE AB Pulsed electron paramagnetic resonance spectroscopy presents an opportunity for measuring both the relaxation and the spectra of electron spin systems. Spectra and relaxation probe two very different aspects of the spin system. However, the lack of recognizable features on most relaxation curves makes the analysis and interpretation of relaxation experiments difficult. Some of the strategies for design and interpretation of relaxation experiments are discussed C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. RI Bowman, Michael/F-4265-2011 OI Bowman, Michael/0000-0003-3464-9409 NR 24 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-2393 J9 ADV CHEM SER JI Adv. Chem. Ser. PY 1993 IS 229 BP 91 EP 105 PG 15 WC Chemistry, Multidisciplinary SC Chemistry GA KG269 UT WOS:A1993KG26900005 ER PT J AU DAUM, PH SPRINGSTON, SR AF DAUM, PH SPRINGSTON, SR TI TROPOSPHERIC SAMPLING WITH AIRCRAFT SO ADVANCES IN CHEMISTRY SERIES LA English DT Review ID AUTOMATED FLUOROMETRIC METHOD; AIRBORNE OZONE INSTRUMENT; COMMERCIAL NOX DETECTOR; SULFUR-DIOXIDE; HYDROGEN-PEROXIDE; VERTICAL-DISTRIBUTION; CARBON-MONOXIDE; NITRIC-ACID; CLOUD WATER; AMBIENT AIR AB The use of aircraft in atmospheric sampling places stringent requirements on the instruments used to measure the concentrations of atmospheric trace gases and aerosols. Some of these requirements, such as minimization of size, weight, and power consumption, are general; others are specific to individual techniques. This review presents the basic principles and considerations governing the deployment of trace gas and aerosol instrumentation on an aircraft. An overview of common instruments illustrates these points and provides guidelines for designing and using instruments on aircraft-based measurement programs. RP DAUM, PH (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV ENVIRONM CHEM,UPTON,NY 11973, USA. NR 108 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-2393 J9 ADV CHEM SER JI Adv. Chem. Ser. PY 1993 IS 232 BP 101 EP 132 PG 32 WC Chemistry, Multidisciplinary SC Chemistry GA KJ222 UT WOS:A1993KJ22200004 ER PT J AU HILL, CL KOZIK, M WINKLER, J HOU, YQ PROSSERMCCARTHA, CM AF HILL, CL KOZIK, M WINKLER, J HOU, YQ PROSSERMCCARTHA, CM TI POLYOXOMETALATES IN CATALYTIC PHOTOCHEMICAL HYDROCARBON FUNCTIONALIZATION AND PHOTOMICROLITHOGRAPHY - EXCITED-STATE LIFETIMES AND SUBSEQUENT THERMAL-PROCESSES INVOLVING W10O324- SO ADVANCES IN CHEMISTRY SERIES LA English DT Review ID C-H BOND; CHEMICAL AMPLIFICATION; PHOTOREDOX CHEMISTRY; CARBON-TETRACHLORIDE; ORGANIC-COMPOUNDS; EARLY EVENTS; REDUCTION; ALKANES; COMPLEXES; SYSTEMS AB The energetic and mechanistic features of catalytic photochemical oxidation of organic substrates by polyoxometalates and then the applications of this chemistry to catalytic alkane functionalization, microlithography, and catalytic dehalogenation are succinctly reviewed. Three sets of experiments that affect these areas are presented, and the future development of catalyic photoredox processes effected by polyoxometalates is discussed. The excited state of decatungstate, W10O324- (1), and the conventional ground-state radical, tert-BuO., have similar reactivities and lead to similar products upon reaction with various organic substrates. The simultaneous photooxidation of cyclooctane and tetrahydrofuran leads to some cross-coupling product and a complex organic product distribution that is consistent to a large degree with intermediate freely diffusing radicals. Laser flash photolysis measurements (355-nm frequency tripled Nd:YAG output) of the heretofore unreported emission of 1 (lamdba(max) = 615 nm) establish that the lifetime of the excited state (1*) is 21 +/- 3 ps at 25-degrees-C in 9:1 acetonitrile-water solution. C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. RP HILL, CL (reprint author), EMORY UNIV,DEPT CHEM,ATLANTA,GA 30322, USA. NR 37 TC 2 Z9 2 U1 1 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-2393 J9 ADV CHEM SER JI Adv. Chem. Ser. PY 1993 IS 238 BP 243 EP 259 PG 17 WC Chemistry, Multidisciplinary SC Chemistry GA LZ060 UT WOS:A1993LZ06000013 ER PT J AU TSIAO, CJ BOTTO, RE AF TSIAO, CJ BOTTO, RE TI MEASUREMENT OF SPIN-LATTICE RELAXATION IN ARGONNE PREMIUM COAL SAMPLES SO ADVANCES IN CHEMISTRY SERIES LA English DT Review ID NUCLEAR MAGNETIC-RESONANCE; C-13 NMR; QUANTITATIVE RELIABILITY; SPECTROMETRIC ANALYSIS; CROSS POLARIZATION; H-1-NMR; POLYMERS; SPECTROSCOPY; RESOLUTION; PROTONS AB Eight Argonne Premium coals and three weathered Argonne coal samples were investigated by using C-13 cross-polarization-magic-angle spinning (CP-MAS) NMR spectroscopy Proton and carbon spin-lattice relaxation measurements were performed on each coal. The carbon spin-lattice relaxation time T1C; the carbon spin-lattice relaxation time in the rotating frame, T1rho(C); and the proton spin-lattice relaxation time in the rotating frame, T1rho(H), are reported for aromatic and aliphatic carbons of the 11 coal samples. In general, the proton and carbon spin-lattice relaxation data can be evaluated as the sum of two exponential decays. The longer components of carbon relaxation times in the laboratory tory and rotating reference frames vary in a systematic way with coal rank as expressed by percent carbon. The trends can be explained in terms of motional properties of the coals and the presence of paramagnetic species. Marked changes in the relaxation parameters have been observed between pristine and weathered coals. Reduction in proton T1rho values upon weathering is shown to have an adverse effect on quantitation with CP. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 38 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-2393 J9 ADV CHEM SER JI Adv. Chem. Ser. PY 1993 IS 229 BP 341 EP 358 PG 18 WC Chemistry, Multidisciplinary SC Chemistry GA KG269 UT WOS:A1993KG26900018 ER PT J AU DELAROSA, L PRUSKI, M GERSTEIN, B AF DELAROSA, L PRUSKI, M GERSTEIN, B TI QUANTITATION OF PROTONS IN THE ARGONNE PREMIUM COALS BY SOLID-STATE H-1-NMR SPECTROSCOPY SO ADVANCES IN CHEMISTRY SERIES LA English DT Review ID NUCLEAR MAGNETIC-RESONANCE; BROWN-COAL/WATER SYSTEM; MOLECULAR-STRUCTURE; WATER; HOMONUCLEAR; RELAXATION; MOISTURE; HYDROGEN AB Quantitation of protons and moisture in the eight coals from the Argonne Premium Coal Sample Program was performed by using H-1 NMR spectroscopy. The solid echo was used to determine the true line shape of the on-resonance H-1 free induction decay (FID). A superposition of Gaussian and Lorentzian decay functions adequately described the FID of dry coals. The Gaussian fraction corresponds to rigid protons in the macrostructure of coal The Lorentzian fraction is attributed to fragments in the coal exhibiting hindered molecular mobility. For wet coals, an additional slowly decaying Lorentzian fraction must be added to the description of the FID Identification of the species responsible for the longest decay was made by liquid-state NMR spectroscopy of the condensate obtained by heating the sample at 100-degrees-C under static vacuum, and high-resolution solid-state H-1 NMR spectra of the coals were obtained before and after removing the volatile matter at 100-degrees-C The NMR quantitation results compared favorably with the results that were obtained by chemical and thermogravimetric analyses. C1 IOWA STATE UNIV SCI & TECHNOL,INST PHYS RES & TECHNOL,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 26 TC 1 Z9 1 U1 2 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-2393 J9 ADV CHEM SER JI Adv. Chem. Ser. PY 1993 IS 229 BP 359 EP 376 PG 18 WC Chemistry, Multidisciplinary SC Chemistry GA KG269 UT WOS:A1993KG26900019 ER PT J AU FRANZ, JA LINEHAN, JC AF FRANZ, JA LINEHAN, JC TI BLOCH-DECAY AND CROSS-POLARIZATION - MAGIC-ANGLE SPINNING C-13 NMR-STUDY OF THE ARGONNE PREMIUM COALS - EFFECTS OF HIGH-SPEED SPINNING SO ADVANCES IN CHEMISTRY SERIES LA English DT Review ID NUCLEAR MAGNETIC-RESONANCE; MODEL ORGANIC-COMPOUNDS; PROTON-ENHANCED NMR; SOLID-STATE NMR; DILUTE SPINS; WHOLE COALS; CP-MAS; SPECTROSCOPY; MACERALS; SPECTRA AB Bloch-decay and variable-contact-time C-13 cross-polarization-magic-angle spinning (CP-MAS) NMR data at a spinning rate of 13 kHz are presented for the Argonne Premium coals. High-field (7.05 T, 75 MHz, 13-kHz MAS) aromaticities are in satisfactory agreement with low-field CP-MAS (2.3 T, 25 MHz, 4-kHz MAS) results, with the exception of the high oxygen containing Wyodak-Anderson coal. Bloch-decay aromaticities obtained at 13-kHz MAS agree with CP-MAS results as 25 MHz (4-kHz MAS) for all of the bituminous coals, but CP-MAS gives significantly lower aromaticities than Bloch decay for the lignite (Beulah-Zap) and subbituminous (Wyodak-Anderson) coals. A Bloch-decay and variable-contact-time CP-MAS study of the ratios of protonated, nonprotonated, and isolated aromatic carbons of acenaphthene revealed small systematic errors for individual carbon intensities, but satisfactory average relative intensities for different structural groups. High-speed MAS leads to measured aromaticities within 3-5% of those measured by low-speed MAS for medium- and high-rank coals. However, significant errors in CP-MAS aromaticities of low-rank coals, together with the failure to an appreciable fraction of oxygenated and quaternary carbons, suggest that Bloch decay is the method of choke for determination of structural distributions. Sources of disagreement between Bloch decay and CP-MAS aromaticities for Wyodak-Anderson and Beulah-Zap coals are discussed. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 35 TC 1 Z9 1 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-2393 J9 ADV CHEM SER JI Adv. Chem. Ser. PY 1993 IS 229 BP 377 EP 400 PG 24 WC Chemistry, Multidisciplinary SC Chemistry GA KG269 UT WOS:A1993KG26900020 ER PT J AU OGILBY, PR DILLON, MP GAO, YP IU, KK KRISTIANSEN, M TAYLOR, VL CLOUGH, RL AF OGILBY, PR DILLON, MP GAO, YP IU, KK KRISTIANSEN, M TAYLOR, VL CLOUGH, RL TI POLYMER CHARACTERIZATION USING SINGLET OXYGEN PHOSPHORESCENCE AS A SPECTROSCOPIC PROBE SO ADVANCES IN CHEMISTRY SERIES LA English DT Review ID PHASE PHOTOSENSITIZED REACTION; 1-DELTA-G; DEACTIVATION; TEMPERATURE; IRRADIATION; CHEMISTRY; SOLVENT; BAND AB Singlet molecular oxygen (1DELTA(g)O2) can be produced in solid organic polymers by a variety of different methods. The phosphorescence of singlet oxygen can be monitored in both steady-state and time-resolved experiments, yielding valuable information on the structure and properties of (1) the polymer and (2) solutes dissolved in the polymer. With this spectroscopic probe, we are also able to comment on specific processes that can have important practical ramifications including, for example, the degradation of polymers. In addition, this probe provides a method by which oxygen diffusion coefficients can rapidly and accurately be determined for easily prepared polymer films. C1 SANDIA NATL LABS, DIV ORGAN MAT ORG 1811, ALBUQUERQUE, NM 87185 USA. RP OGILBY, PR (reprint author), UNIV NEW MEXICO, DEPT CHEM, ALBUQUERQUE, NM 87131 USA. NR 26 TC 0 Z9 0 U1 2 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-2393 J9 ADV CHEM SER JI Adv. Chem. Ser. PY 1993 IS 236 BP 573 EP 598 PG 26 WC Chemistry, Multidisciplinary SC Chemistry GA MF799 UT WOS:A1993MF79900022 ER PT J AU ROTHENBERGER, KS SPRECHER, RF CASTELLANO, SM RETCOFSKY, HL AF ROTHENBERGER, KS SPRECHER, RF CASTELLANO, SM RETCOFSKY, HL TI TEMPERATURE-DEPENDENCE OF THE ELECTRON-PARAMAGNETIC RESONANCE INTENSITY OF WHOLE COALS - THE SEARCH FOR TRIPLET-STATES SO ADVANCES IN CHEMISTRY SERIES LA English DT Review ID BITUMINOUS COAL; TTF-TCNQ; SUSCEPTIBILITY; RADICALS AB The electron paramagnetic resonance intensity of coal as a function of temperature was investigated to determine the contribution of triplet-state species. The importance of considering the intensity behavior over an extended range of temperature without regard to a particular choice of energy separation, J, between the singlet and triplet states, is emphasized Data collected on a wide variety of whole coals with a nitrogen gas-flow variable-temperature apparatus show a highly linear intensity versus reciprocal temperature relationship, in agreement with the Curie law, but with a nonzero intercept To remove any ambiguity from these results, a closed-cycle refrigeration system was employed to collect data down to approximately 10 K. Non-Curie law behavior results at the very lowest temperatures have been attributed to experimental problems involving thermal contact, not to the presence of triplet states. Even if the reported effects were actually a consequence of triplet states caused by charge-transfer interactions, these interactions would have to be so small (J < 10 cm-1) as to be insignificant to the chemistry of the system. C1 US DOE,PITTSBURGH ENERGY TECHNOL CTR,PITTSBURGH,PA 15236. NR 19 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-2393 J9 ADV CHEM SER JI Adv. Chem. Ser. PY 1993 IS 229 BP 581 EP 604 PG 24 WC Chemistry, Multidisciplinary SC Chemistry GA KG269 UT WOS:A1993KG26900031 ER PT J AU BOWMAN, MK AF BOWMAN, MK TI MEASUREMENT OF ELECTRON DIPOLAR FIELDS AND DYNAMICS IN SOLIDS SO ADVANCES IN CHEMISTRY SERIES LA English DT Review ID SPIN AB The spin-temperature treatment used in solid-state NMR spectroscopy and the statistical treatment used in electron spin-echo (ESE) spectroscopy are compared The statistical treatment is shown to be an exact solution of a multispin Hamiltonian with certain bilinear terms treated as relaxation processes. The magnitude of the dipolar field and its autocorrelation function have been identified in both treatments. This allows the transfer of experimental data on electron dipolar fields to nuclear spin systems in solids containing large numbers of paramagnetic centers. Measurements of the dipolar field and its relaxation time are demonstrated on samples from the Argonne Premium Coal Sample program. Even brief exposure to air has significant effects on the electron-spin dynamics. Sample preparation is an important aspect of magnetic resonance experiments on coal. C1 ARGONNE NATL LAB, DIV CHEM, ARGONNE, IL 60439 USA. RI Bowman, Michael/F-4265-2011 OI Bowman, Michael/0000-0003-3464-9409 NR 28 TC 1 Z9 1 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-2393 J9 ADV CHEM SER JI Adv. Chem. Ser. PY 1993 IS 229 BP 605 EP 626 PG 22 WC Chemistry, Multidisciplinary SC Chemistry GA KG269 UT WOS:A1993KG26900032 ER PT J AU SILBERNAGEL, BG BOTTO, RE AF SILBERNAGEL, BG BOTTO, RE TI ADVANCED MAGNETIC-RESONANCE TECHNIQUES APPLIED TO ARGONNE PREMIUM COALS SO ADVANCES IN CHEMISTRY SERIES LA English DT Review ID MACERALS AB The application of a wide variety of magnetic resonance techniques to Argonne Premium coals provides a great deal of information about both the coal samples and the methodology being employed for their examination. Electron paramagnetic resonance (EPR) observations at high frequencies and as a function of temperature give a clearer picture of the different types of carbon radicals present in these coals. Electron spin-echo (ESE) measurements of the radical relaxation times reveal significant variations in coals of different ranks. Electron nuclear double resonance (ENDOR) techniques, both continuous wave and pulsed, reveal details of the interaction of the unpaired electron of the radical with the nuclei on its host molecule and adjacent molecules. Various NMR techniques have been applied to the quantitation of the percentage of aromatic carbon in the various coals. These advanced techniques, coupled with studies of coal changes with chemical (oxidation, pyrolysis, and reactions with donor and acceptor molecules) and physical (physisorption and solvent swelling) changes expand our understanding of these coals. C1 EXXON RES & ENGN CO,CORP RES,ANNANDALE,NJ 08801. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 16 TC 2 Z9 2 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-2393 J9 ADV CHEM SER JI Adv. Chem. Ser. PY 1993 IS 229 BP 629 EP 643 PG 15 WC Chemistry, Multidisciplinary SC Chemistry GA KG269 UT WOS:A1993KG26900033 ER PT J AU VEMURI, V AF VEMURI, V TI ARTIFICIAL NEURAL NETWORKS IN CONTROL APPLICATIONS SO ADVANCES IN COMPUTERS, VOL 36 SE ADVANCES IN COMPUTERS LA English DT Review ID MULTILAYER FEEDFORWARD NETWORKS; PATTERN-RECOGNITION; ASSOCIATIVE MEMORY; INTELLIGENCE; BRAIN; OPTIMIZATION; ALGORITHM; MOVEMENT; MACHINE; SYSTEMS C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA. RP VEMURI, V (reprint author), UNIV CALIF DAVIS,DEPT APPL SCI,DAVIS,CA, USA. NR 120 TC 7 Z9 7 U1 1 U2 1 PU ACADEMIC PRESS INC PI SAN DIEGO PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 0065-2458 J9 ADV COMPUT PY 1993 VL 36 BP 203 EP 254 DI 10.1016/S0065-2458(08)60272-7 PG 52 WC Computer Science, Cybernetics; Computer Science, Interdisciplinary Applications; Computer Science, Software Engineering SC Computer Science GA BZ73B UT WOS:A1993BZ73B00004 ER PT J AU HARTMAN, FC HARPEL, MR AF HARTMAN, FC HARPEL, MR TI CHEMICAL AND GENETIC PROBES OF THE ACTIVE-SITE OF D-RIBULOSE-1,5-BISPHOSPHATE CARBOXYLASE OXYGENASE - A RETROSPECTIVE BASED ON THE 3-DIMENSIONAL STRUCTURE SO ADVANCES IN ENZYMOLOGY AND RELATED AREAS OF MOLECULAR BIOLOGY, VOL 67 SE ADVANCES IN ENZYMOLOGY AND RELATED AREAS OF MOLECULAR BIOLOGY LA English DT Review ID RIBULOSE-BISPHOSPHATE CARBOXYLASE; RUBRUM RIBULOSEBISPHOSPHATE CARBOXYLASE; COLI GLUTATHIONE-REDUCTASE; REDUCED CO2/O2 SPECIFICITY; RIBULOSE-1,5-BISPHOSPHATE CARBOXYLASE; RHODOSPIRILLUM-RUBRUM; DIRECTED MUTAGENESIS; 1,5-BISPHOSPHATE CARBOXYLASE; ESCHERICHIA-COLI; SMALL SUBUNIT RP HARTMAN, FC (reprint author), OAK RIDGE NATL LAB,DIV BIOL,POB 2009,OAK RIDGE,TN 37831, USA. NR 180 TC 36 Z9 36 U1 1 U2 3 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 3RD AVE, NEW YORK, NY 10016 SN 0065-258X J9 ADV ENZYMOL RAMB PY 1993 VL 67 BP 1 EP 75 PG 75 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA BB86W UT WOS:A1993BB86W00001 PM 8322615 ER PT J AU TRIBBLE, DL KRAUSS, RM AF TRIBBLE, DL KRAUSS, RM TI HDL AND CORONARY-ARTERY DISEASE SO ADVANCES IN INTERNAL MEDICINE, VOLUME 38 SE ADVANCES IN INTERNAL MEDICINE LA English DT Review ID HIGH-DENSITY-LIPOPROTEIN; APOLIPOPROTEIN-A-I; MONOUNSATURATED FATTY-ACIDS; DETERMINING ATHEROSCLEROSIS SUSCEPTIBILITY; FAMILIAL COMBINED HYPERLIPIDEMIA; TRIGLYCERIDE-RICH LIPOPROTEINS; PLASMA TOTAL-CHOLESTEROL; HEPATIC LIPASE; HEART-DISEASE; BODY-FAT RP TRIBBLE, DL (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DEPT MOLEC & NUCL MED,DIV LIFE SCI,BERKELEY,CA, USA. FU NHLBI NIH HHS [HL 33577, HL 18574] NR 192 TC 32 Z9 32 U1 0 U2 0 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146 SN 0065-2822 J9 ADV INTERNAL MED JI Adv.Intern.Med. PY 1993 VL 38 SI 19 BP 1 EP 29 PG 29 WC Medicine, General & Internal SC General & Internal Medicine GA BZ78L UT WOS:A1993BZ78L00001 PM 8438633 ER PT J AU MERRILL, AH WANG, E GILCHRIST, DG RILEY, RT AF MERRILL, AH WANG, E GILCHRIST, DG RILEY, RT TI FUMONISINS AND OTHER INHIBITORS OF DE-NOVO SPHINGOLIPID BIOSYNTHESIS SO ADVANCES IN LIPID RESEARCH, VOL 26 SE ADVANCES IN LIPID RESEARCH LA English DT Review ID PROTEIN-KINASE-C; GROWTH-FACTOR RECEPTOR; F-SP-LYCOPERSICI; EPIDERMOID CARCINOMA-CELLS; NECROSIS-FACTOR-ALPHA; HAMSTER OVARY CELLS; FUSARIUM-MONILIFORME; AAL-TOXIN; RAT-LIVER; PHOSPHATIDATE PHOSPHOHYDROLASE C1 LAWRENCE LIVERMORE NATL LAB,DEPT PLANT PATHOL,DAVIS,CA 95616. USDA ARS,TOXICIOL & MYCOTOXINS RES UNIT,ATHENS,GA 30613. RP MERRILL, AH (reprint author), EMORY UNIV,SCH MED,ROLLINS RES CTR,DEPT BIOCHEM,ATLANTA,GA 30322, USA. FU NIGMS NIH HHS [GM33369] NR 80 TC 183 Z9 183 U1 1 U2 1 PU ACADEMIC PRESS INC PI SAN DIEGO PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 0065-2849 J9 ADV LIPID RES JI Adv.Lipid Res. PY 1993 VL 26 BP 215 EP 234 PG 20 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA BZ68E UT WOS:A1993BZ68E00011 PM 8379451 ER PT B AU WALTON, JD AF WALTON, JD BE Nester, EW Verma, DPS TI MOLECULAR-BASIS OF SPECIFICITY IN MAIZE LEAF-SPOT DISEASE SO ADVANCES IN MOLECULAR GENETICS OF PLANT-MICROBE INTERACTIONS, VOL 2 SE CURRENT PLANT SCIENCE AND BIOTECHNOLOGY IN AGRICULTURE LA English DT Proceedings Paper CT 6th International Symposium on Molecular Plant-Microbe Interactions CY JUL, 1992 CL SEATTLE, WA SP NATL SCI FDN, USDA, US DOE, AGRITOPE INC, CALGENE, CIBA GEIGY AG BIOTECHNOL, CIBA GEIGY BASLE, DEKALB PLANT GENET, INT SOC PLANT MOLEC BIOL, MONSANTO, PIONEER HI BRED, SAMUEL ROBERTS NOBLE FDN INC, PLANT BIOL DIV, RHONE POULENC, AMER PHYTOPATHOL SOC, UNIV WASHINGTON, GRAD SCH C1 MICHIGAN STATE UNIV,US DOE,PLANT RES LAB,E LANSING,MI 48824. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2045-X J9 CURR PLANT SCI BIOT PY 1993 VL 14 BP 313 EP 323 PG 11 WC Agronomy; Biotechnology & Applied Microbiology; Plant Sciences; Genetics & Heredity SC Agriculture; Biotechnology & Applied Microbiology; Plant Sciences; Genetics & Heredity GA BA35U UT WOS:A1993BA35U00034 ER PT B AU MEELEY, RB WALTON, JD AF MEELEY, RB WALTON, JD BE Nester, EW Verma, DPS TI MOLECULAR-BIOLOGY AND BIOCHEMISTRY OF HM1, A MAIZE GENE FOR FUNGAL RESISTANCE SO ADVANCES IN MOLECULAR GENETICS OF PLANT-MICROBE INTERACTIONS, VOL 2 SE CURRENT PLANT SCIENCE AND BIOTECHNOLOGY IN AGRICULTURE LA English DT Proceedings Paper CT 6th International Symposium on Molecular Plant-Microbe Interactions CY JUL, 1992 CL SEATTLE, WA SP NATL SCI FDN, USDA, US DOE, AGRITOPE INC, CALGENE, CIBA GEIGY AG BIOTECHNOL, CIBA GEIGY BASLE, DEKALB PLANT GENET, INT SOC PLANT MOLEC BIOL, MONSANTO, PIONEER HI BRED, SAMUEL ROBERTS NOBLE FDN INC, PLANT BIOL DIV, RHONE POULENC, AMER PHYTOPATHOL SOC, UNIV WASHINGTON, GRAD SCH C1 MICHIGAN STATE UNIV,US DOE,PLANT RES LAB,E LANSING,MI 48824. NR 0 TC 3 Z9 3 U1 0 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2045-X J9 CURR PLANT SCI BIOT PY 1993 VL 14 BP 463 EP 467 PG 5 WC Agronomy; Biotechnology & Applied Microbiology; Plant Sciences; Genetics & Heredity SC Agriculture; Biotechnology & Applied Microbiology; Plant Sciences; Genetics & Heredity GA BA35U UT WOS:A1993BA35U00051 ER PT B AU CIESIELSKI, B WIELOPOLSKI, L AF CIESIELSKI, B WIELOPOLSKI, L BE Soloway, AH Barth, RF Carpenter, DE TI APPLICATION OF FRICKE DOSIMETRY FOR BNCT SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 BROOKHAVEN NATL LAB,RADIAT THERAPY FACIL,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 53 EP 57 PG 5 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00011 ER PT B AU NIGG, DW STORR, GJ WHEELER, FJ AF NIGG, DW STORR, GJ WHEELER, FJ BE Soloway, AH Barth, RF Carpenter, DE TI PHYSICS PARAMETERS FOR AN EPITHERMAL-NEUTRON BEAM AT THE GEORGIA-INSTITUTE-OF-TECHNOLOGY SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 EG&G IDAHO INC,IDAHO NATL ENGN LAB,NATL CTR BNCT MEASUREMENT & DEV,IDAHO FALLS,ID 83415. NR 0 TC 3 Z9 3 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 71 EP 74 PG 4 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00014 ER PT B AU LIU, HB BRUGGER, RM RORER, DC AF LIU, HB BRUGGER, RM RORER, DC BE Soloway, AH Barth, RF Carpenter, DE TI ENHANCEMENT OF THE EPITHERMAL NEUTRON BEAM AT THE BROOKHAVEN-MEDICAL-RESEARCH-REACTOR SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. NR 0 TC 4 Z9 4 U1 0 U2 2 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 75 EP 79 PG 5 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00015 ER PT B AU LIU, HB BRUGGER, RM AF LIU, HB BRUGGER, RM BE Soloway, AH Barth, RF Carpenter, DE TI AN EPITHERMAL NEUTRON BEAM FROM THE MURR AND FROM AN ACCELERATOR SOURCE COMPARED TO THE BEAM AT THE BMRR SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. NR 0 TC 1 Z9 1 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 109 EP 113 PG 5 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00022 ER PT B AU NIGG, DW AF NIGG, DW BE Soloway, AH Barth, RF Carpenter, DE TI ANALYTICAL DOSIMETRY AND TREATMENT PLANNING FOR BNCT SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 EG&G IDAHO INC,IDAHO NATL ENGN LAB,NATL CTR BNCT MEASUREMENT & DEV,IDAHO FALLS,ID 83415. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 143 EP 146 PG 4 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00029 ER PT B AU ESTES, GP TAYLOR, WM AF ESTES, GP TAYLOR, WM BE Soloway, AH Barth, RF Carpenter, DE TI POTENTIAL MCNP ENHANCEMENTS FOR NCT SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 LOS ALAMOS NATL LAB,RADIAT TRANSPORT GRP,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 147 EP 151 PG 5 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00030 ER PT B AU STORR, GJ WHEELER, FJ AF STORR, GJ WHEELER, FJ BE Soloway, AH Barth, RF Carpenter, DE TI POST TREATMENT DOSE DISTRIBUTION EVALUATION FOR A RECENT NCT PATIENT SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 153 EP 157 PG 5 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00031 ER PT B AU LIU, HB BRUGGER, RM AF LIU, HB BRUGGER, RM BE Soloway, AH Barth, RF Carpenter, DE TI DOSE CALCULATION AND TREATMENT PLANNING FOR THE BROOKHAVEN NCT FACILITY SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. NR 0 TC 3 Z9 3 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 165 EP 169 PG 5 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00033 ER PT B AU BRUGGER, RM LIU, HB LASTER, BH GORDON, CR GREENBERG, DD WARKENTIEN, LS AF BRUGGER, RM LIU, HB LASTER, BH GORDON, CR GREENBERG, DD WARKENTIEN, LS BE Soloway, AH Barth, RF Carpenter, DE TI GADOLINIUM AS AN ELEMENT FOR NEUTRON-CAPTURE THERAPY SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. NR 0 TC 1 Z9 1 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 225 EP 229 PG 5 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00045 ER PT B AU MIURA, M MICCA, PL HEINRICHS, JC SLATKIN, DN AF MIURA, M MICCA, PL HEINRICHS, JC SLATKIN, DN BE Soloway, AH Barth, RF Carpenter, DE TI SYNTHESIS AND PRELIMINARY IN-VIVO TOXICITY EVALUATION OF AN IODINATED SULFIDOBORATE SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. NR 0 TC 3 Z9 3 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 339 EP 343 PG 5 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00071 ER PT B AU BAUER, WF MICCA, PL WHITE, BM AF BAUER, WF MICCA, PL WHITE, BM BE Soloway, AH Barth, RF Carpenter, DE TI A RAPID METHOD FOR THE DIRECT ANALYSIS OF BORON IN WHOLE-BLOOD BY ATOMIC-EMISSION SPECTROSCOPY SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. RI Bauer, William/B-8357-2016 OI Bauer, William/0000-0002-7190-9700 NR 0 TC 18 Z9 18 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 403 EP 407 PG 5 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00083 ER PT B AU HOTZ, NJ BAUER, WF AF HOTZ, NJ BAUER, WF BE Soloway, AH Barth, RF Carpenter, DE TI DETERMINATION OF STRONGLY PROTEIN-BOUND BOROCAPTATE SPECIES BY HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY WITH ONLINE INDUCTIVELY-COUPLED PLASMA-ATOMIC EMISSION-SPECTROSCOPY DETECTION OF BORON SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. RI Bauer, William/B-8357-2016 OI Bauer, William/0000-0002-7190-9700 NR 0 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 439 EP 443 PG 5 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00090 ER PT B AU GIANOTTO, AK BAUER, WF AF GIANOTTO, AK BAUER, WF BE Soloway, AH Barth, RF Carpenter, DE TI PURITY AND QUALITY DETERMINATIONS OF BOROCAPTATE SODIUM SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. RI Bauer, William/B-8357-2016 OI Bauer, William/0000-0002-7190-9700 NR 0 TC 2 Z9 2 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 459 EP 463 PG 5 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00094 ER PT B AU JOEL, DD SLATKIN, DN CODERRE, JA AF JOEL, DD SLATKIN, DN CODERRE, JA BE Soloway, AH Barth, RF Carpenter, DE TI UPTAKE OF B-10 IN GLIOSARCOMAS FOLLOWING THE INJECTION OF GLUTATHIONE MONOETHYL ESTER AND SULFHYDRYL BORANE SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. NR 0 TC 3 Z9 3 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 501 EP 504 PG 4 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00101 ER PT B AU LASTER, BH KAHL, SB WARKENTIEN, L BOND, VP AF LASTER, BH KAHL, SB WARKENTIEN, L BOND, VP BE Soloway, AH Barth, RF Carpenter, DE TI IN-VIVO STUDIES IN NCT WITH A BORONATED PORPHYRIN AND TUMOR-GROWTH DELAY AS AN END-POINT SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. NR 0 TC 4 Z9 4 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 535 EP 539 PG 5 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00108 ER PT B AU NIGG, DW MORAN, JM WHEELER, FJ AF NIGG, DW MORAN, JM WHEELER, FJ BE Soloway, AH Barth, RF Carpenter, DE TI DETERMINATION OF FAST-NEUTRON DOSE DISTRIBUTIONS IN THE CANINE CENTRAL-NERVOUS-SYSTEM SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 EG&G IDAHO INC,IDAHO NATL ENGN LAB,NATL CTR BNCT MEASUREMENT & DEV,IDAHO FALLS,ID 83415. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 603 EP 606 PG 4 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00121 ER PT B AU ATKINSON, CA WHEELER, FJ AF ATKINSON, CA WHEELER, FJ BE Soloway, AH Barth, RF Carpenter, DE TI DOSE OPTIMIZATION FOR BORON NEUTRON-CAPTURE THERAPY OF SPONTANEOUS CANINE BRAIN-TUMORS SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 607 EP 611 PG 5 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00122 ER PT B AU NELSON, JM BRABY, LA AF NELSON, JM BRABY, LA BE Soloway, AH Barth, RF Carpenter, DE TI IRRADIATION OF SINGLE CELLS WITH INDIVIDUAL HIGH-LET PARTICLES SO ADVANCES IN NEUTRON CAPTURE THERAPY LA English DT Proceedings Paper CT 5th International Symposium on Neutron Capture Therapy CY SEP 13-17, 1992 CL COLUMBUS, OH SP INT SOC NEUTRON CAPTURE THERAPY C1 BATTELLE MEM INST,PACIFIC NW LABS,DEPT BIOL & CHEM,RICHLAND,WA 99352. NR 0 TC 1 Z9 1 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44567-0 PY 1993 BP 633 EP 638 PG 6 WC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA BZ61N UT WOS:A1993BZ61N00127 ER EF