Results 131 to 140 of about 167,718 (203)

Photoconduction extended x-ray-absorption fine structure of GaAs

Physical Review B, 1994
Photoconduction spectra of GaAs samples at photon energies around the Ga and As K edges were measured. Extended x-ray-absorption fine-structure oscillation was observed in these spectra. It is found that the spectrum shape of the photocurrent depends on the sample thickness. A microscopic theory is presented to determine the photoconduction response to
, Hu, , Xie, , Qiao, , Hai, , Jin, , Xian   +5 more
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Radial distribution function in x-ray-absorption fine structure

Physical Review B, 1992
It has been argued that, in systems that have disorder too large to be described by a Gaussian, x-ray-absorption fine-structure (XAFS) spectroscopy alone cannot define the radial distribution function (RDF) because of the lack of low-k data. We show that the low-k data can, under certain conditions, be reconstructed using cumulant expansions, which ...
, Stern, , Ma, , Hanske-Petitpierre, , Bouldin   +3 more
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Inelastic processes in extended x-ray-absorption fine structure

Physical Review B, 1988
Inelastic processes in extended x-ray-absorption fine structure (EXAFS) are studied using an extension of the semiclassical model of dynamical screening of a core hole and a photoelectron. This treatment effectively includes both extrinsic and intrinsic inelastic losses, as well as interference between them.
, Lu, , Rehr
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Extended x-ray-absorption fine structure of liquid water

Physical Review B, 1987
Extended x-ray-absorption fine structure (EXAFS) of liquid water above the oxygen K edge is reported for the first time. Major features of the EXAFS spectrum agree with the calculated spectrum based on the known O-O pair correlation function in water.
, Yang, , Kirz
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Thermal expansion and x-ray-absorption fine-structure cumulants

Physical Review B, 1993
In the classical limit, a simple relation has been shown to exist between the thermal expansion coefficient \ensuremath{\alpha} and the cumulants of the vibrational amplitude that are measured in x-ray-absorption fine structure (XAFS), i.e., \ensuremath{\alpha}rT${\mathrm{\ensuremath{\sigma}}}^{2}$/${\mathrm{\ensuremath{\sigma}}}^{(3)}$=1/2, where ...
, Frenkel, , Rehr
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X-ray Absorption Fine Structure - XAFS14: 14th International Conference on X-ray Absorption Fine Structure

2010
14th International Conference on X-ray Absorption Fine Structure, Camerino, Italy, 26-31 July ...
DI CICCO, Andrea, A. Filipponi
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Extended X-Ray Absorption Fine Structure

2018
Extended X-ray absorption fine structure (EXAFS) is a part of X-ray absorption spectroscopy methods to observe local structures of elements of interest.
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Multielectron x-ray photoexcitation observations in x-ray-absorption fine-structure background

Physical Review Letters, 1992
Multielectron excitations involving deep and shallow core levels have been identified for the first time in the x-ray-absorption fine-structure (XAFS) energy range for crystalline samples, RbBr and \ensuremath{\beta}-${\mathrm{PbO}}_{2}$. The XAFS oscillations have been fitted and subtracted from the experimental data using theoretical standards.
, Li, , Bridges, , Brown
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X-ray absorption near-edge structure and extended x-ray absorption fine-structure investigation of Pd silicides

Physical Review B, 1985
X-ray absorption spectroscopy is used to investigate the near-L-edge structures of Pd in pure Pd and bulk ${\mathrm{Pd}}_{2}$Si and PdSi silicides. Possible many-body effects are suggested to explain the apparent discrepancy between the occurrence of ${L}_{2}$,3 white lines and the 4d hole filling in Pd silicides.
M. De Crescenzi, E. Colavita, DEL PENNINO, Umberto, P. Sassaroli, VALERI, Sergio, C. Rinaldi, L. Sorba, NANNARONE, Stefano   +7 more
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Soft X-Ray Absorption Fine Structure

2018
Soft X-ray absorption fine structure (SXAFS) is based on the excitation of core-level electrons to the unoccupied states around the vacuum level, which is accompanied with soft X-ray absorption. Since each element has its own core-level energy, the SXAFS provides with element-specific information.
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