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Creator | Title | Description | Subject | Date |
301 |
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Boehme, Christoph | H loss mechanism during anneal of silicon nitride: chemical dissociation | Remote plasma enhanced chemical vapor deposited silicon nitride (SixNyHz), produced at high ammonia to silane flow rates (ammonia rich) shows a reduction of hydrogen during rapid thermal anneal at temperatures that exceed the deposition temperature. This H release could be either due to a ‘‘slow... | Anneal | 2000 |
302 |
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DeTar, Carleton | Hadronic deformation energy. I. Quark-antiquark separation | The MIT bag model for hadrons is treated in the static cavity approximation in three dimensions with a definite quark number. The energy of the system is computed to second order in the gluon coupling. A constrained variational method is described which permits the calculation of the energy as a f... | Bag models; Quark bag; Deformation energy; Antiquarks; Gluon coupling; Quark energies; Gluon energies | 1978-01 |
303 |
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DeTar, Carleton | Hadronic deformation energy. II. Two-nucleon interaction | The MIT bag model for hadrons is treated in the static cavity approximation. The adiabatic deformation of a six-quark hadron with quantum numbers of the deuteron is studied in a configuration which permits the separation of two triplets with quantum numbers of the neutron and proton. The energy of... | Bag models; Quark bag; Deformation energy; Gluon coupling; Two-nucleon problem; Nucleons; Self-energy | 1978-01 |
304 |
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DeTar, Carleton | Hadronic spectrum of the quark plasma | We have carried out a numerical simulation in SU(3) lattice gauge theory with four flavors of low-mass staggered fermions at zero baryon-number density in the vicinity of the high-temperature phase transition on 6x 103 and 6x 102x20 lattices. Static screening masses (static susceptibilities) were m... | Hadronic matter; Quark plasma; Chiral symmetry; Phase transitions | 1987-07 |
305 |
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Gondolo, Paolo | Halo independent comparison of direct dark matter detection data | We extend the halo-independent method of Fox, Liu, and Weiner to include energy resolution and efficiency with arbitrary energy dependence, making it more suitable for experiments to use in pre-senting their results. Then we compare measurements and upper limits on the direct detection of low mass (... | | 2012-01-01 |
306 |
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DeTar, Carleton | Heavy-light decay constants - MILC results with the Wilson action | We present the current status of our ongoing calculations of pseudoscalar meson decay constants for mesons that contain one light and one heavy quark (fB, fBs , fD, fDs ). We are currently generating new gauge configurations that include dynamical quarks and calculating the decay constants. In add... | Decay constants; Wilson action; Kogut-Susskind quarks; Staggered quarks; Chiral extrapolation | 1998-01 |
307 |
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DeTar, Carleton | Heavy-light decay constants using clover valence quarks and three flavors of dynamical improved staggered quarks | Starting in 2001, the MILC Collaboration began a large scale calculation of heavy-light meson decay constants using clover valence quarks on ensembles of three flavor configurations. For the coarse configurations, with a = 0.12 fm, eight combinations of dynamical light and strange quarks have been ... | Decay constants; Clover valence quarks; Staggered quarks | 2005-03 |
308 |
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DeTar, Carleton | Heavy-light decay constants with dynamical gauge configurations and Wilson or improved valence quark actions | We describe a calculation of heavy-light decay constants including virtual quark loop effects. We have generated dynamical gauge configurations at three _x000C_ values using two flavors of Kogut-Susskind quarks with a range of masses. These are analyzed with a Wilson valence quark action. Prelimin... | Decay constants; Kogut-Susskind quarks; Wilson quarks; Fat-clover valence quarks | 2000-04 |
309 |
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DeTar, Carleton | Heavy-light decay constants with three dynamical flavors | We present preliminary results for the heavy-light leptonic decay constants in the presence of three light dynamical flavors. We generate dynamical configurations with improved staggered and gauge actions and analyze them for heavy-light physics with tadpole improved clover valence quarks. When th... | Leptonic decay; Decay constants | 2002-03 |
310 |
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DeTar, Carleton | Heavy-light decay constants: conclusions from the Wilson action | We report on the results of a MILC collaboration calculation of fB, fBs , fD, fDs and their ratios. We discuss the most important errors in more detail than we have elsewhere. | Decay constants; Wilson action; Staggered quarks | 1999-03 |
311 |
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DeTar, Carleton | Heavy-light meson decay constants with N f = 3 | During the past year the MILC Collaboration has continued its study of heavy-light meson decay constants with three dynamical quarks. Calculations have been extended to a second lattice spacing of about 0.09 fm. At this lattice spacing, there are results in the quenched approximation and for thr... | Dynamical quarks | 2003-05 |
312 |
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Wu, Yong-Shi | Hidden massive Dirac fermions in effective field theory for integral quantum Hall transitions | Integral quantum Hall plateau transitions in a planar lattice system due to gap collapse can be described by an effective field theory with Dirac fermions. We discuss how to reproduce the correct integral values for the Hall conductance sxy before and after the plateau transition, which are dictat... | Dirac fermions; Vorticities; Edge states; Hall conductance | 1996-08 |
313 |
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Kieda, David B. | High resolution charge measurements of UH cosmic ray nuclei using a direct imaging Cherenkov ground-based observatory | The accurate determination of the elemental composition of cosmic rays at high energies is expected to provide crucial clues on the origin of these particles. Here we discuss a technique that has become possible through the use of modern ground-based Cherenkov imaging detectors. We combine a measure... | Cherenkov light; Quark star; UH nuclei; Magnetic monopole | 2003 |
314 |
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Sokolsky, Pierre | High Resolution Fly's Eye - status and preliminary results on cosmic ray composition above 10^18 eV | We describe the current status of the High Resolution Fly's Eye detector. Event reconstruction and associated systematics for stereo reconstruction are discussed and recent preliminary results on the study of the composition of ultra-high energy cosmic rays by the Xmax method are presented. These r... | Ultra-high energy cosmic rays; Fluorescence; Stereo detection | 2002 |
315 |
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Williams, Clayton C. | High resolution photothermal laser probe | At frequencies near 1 GHz, the acoustic wavelength in argon gas becomes half that of visible light, making possible collinear Bragg scattering of laser light by the sound. This acousto-optic interaction has been used to detect photothermally generated acoustic power at the surface of solids. This ne... | Photothermal laser probe; Silicon wafer | 1984 |
316 |
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Williams, Clayton C. | High resolution thermal microscopy | A new high resolution thermal microscope has been demonstrated capable of imaging thermal fields with sub 1000 angstom resolution. It is based upon a non-contacting near field thermal probe. The thermal probe consists of a thermocouple sensor on the end of a tip with sub 1000 angstrom dimensions. Th... | | 1986 |
317 |
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Ailion, David Charles | High sensitivity nuclear quadrupole resonance approach for detection of modulation wave motion in incommensurate systems | In contrast to conventional NMR techniques that use magnetic field gradients (MFCs) to detect the diffusion of moving atoms, we have developed a highly sensitive approach for detecting electric field gradient (EFG) fluctuations seen by stationary atoms. These EFG fluctuations were observed in the ... | NMR; MFG; Magnetic field gradients; Diffusion constants; Atoms; Nuclei | 1995 |
318 |
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Kieda, David B. | High statistics search for ultrahigh energy gamma-ray emission from Cygnus X-3 and Hercules X-1 | We have carried out a high statistics (2 X 10 9 events) search for ultrahigh energy g-ray emission from the x-ray binary sources Cygnus X-3 and Hercules X-1. Using data taken with the CASA-MIA detector over a five year period (1990-1995), we find no evidence for steady emission from either source. T... | Cygnus X-3; Hercules X-1; Ultrahigh energy; X-rays | 1997 |
319 |
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Symko, Orest George | High Tc rf-biased SQUID | Results are presented on the behavior of a simple rf-biased SQUID made out of YBa2Cu307. It consists of a fractured ceramic pellet stuck together at room temperature. This simple device is shielded by a high Tc tube and it shows the characteristic flux quantization behavior up to 77K. At 4.2K its ma... | High Tc RF-biased SQUID | 1989-03 |
320 |
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DeTar, Carleton | High-precision lattice QCD confronts experiment | The recently developed Symanzik-improved staggered-quark discretization allows unquenched lattice-QCD simulations with much smaller (and more realistic) quark masses than previously possible. To test this formalism, we compare experiment with a variety of nonperturbative calculations in QCD draw... | Staggered quarks | 2004-01 |
321 |
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Wu, Yong-Shi | High-precision quasienergies for a driven two-level atom at the two-photon preresonance | A computation with unprecedented precision is presented for quasienergies of a two-level atom in a monochromatic radiation on the basis of a recently obtained exact expression [D.-S. Guo et al., Phys. Rev. A 73,023419 (2006)]. We start with the proof of an expression theorem. With this theorem the ... | Quasienergies; Preresonance; Floquet periodicity | 2008-02 |
322 |
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Vardeny, Zeev Valentine | High-pressure effects on ultrafast-relaxation kinetics of excitons in polydiacetylene 4BCMU | Ultrafast-relaxation kinetics of the singlet excitons in polydiacetylene 4BCMU was measured at hydrostatic pressures up to 80 kbar, using the pump-probe photoinduced-absorption technique with 70-fs resolution at 2 eV and 5 ps in the spectral range 1.2-2.2 eV. The 100-fs decay component survives at... | Ultrafast-relaxation; Polydiacetylene 4BCMU; Pi-conjugated polymers; Quasi-1D excitations | 1991-05 |
323 |
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Vardeny, Zeev Valentine | High-pressure study of picosecond exciton dynamics in solid C60 | We have studied the singlet exciton decay by picosecond photoinduced absorption in films of Qo, under pressures up to 62 kbar. The picosecond decay of excitons excited in the absorption tail continues to be dominated by broad distributions of lifetimes at high pressure. These results suggest that th... | Picosecond exciton dynamics; Solid C60 | 1994-08 |
324 |
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Williams, Clayton C. | High-resolution photothermal laser probe | An advance in photothermal imaging is described. A photothermal laser probe is presented that operates at a frequency of 1 GHz. At this frequency the spacial resolution is limited only by the optical spot size of the probe beam. The photothermal sensitivity of the probe is 1.2 X 10-4 degrees Celsiu... | Laser probes | 1985 |
325 |
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Dawson, Kyle | High-voltage-compatible fully depleted CCDs | We describe charge-coupled device (CCD) development activities at the Lawrence Berkeley National Laboratory (LBNL). Back-illuminated CCDs fabricated on 200-300 fxm thick, fully depleted, high-resistivity silicon substrates are produced in partnership with a commercial CCD foundry. The CCDs are full... | Large Synoptic Survey Telescope; X-ray emission; XMM2235 | 2006 |