Results 251 to 260 of about 284,099 (288)

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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Tunable laboratory extended x-ray absorption fine structure system

Review of Scientific Instruments, 1980
A new sensitive x-ray monochromator and detector system for performing extended x-ray absorption fine structure (EXAFS) measurements in the laboratory is described. The monochromator combines x-ray focusing optics with rapid elemental tunability. The detection system effectively removes glitches from the data stream, regardless of whether they are due ...
G G, Cohen, D A, Fischer, J, Colbert, N J, Shevchik   +3 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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Electrochemical X-Ray Absorption Fine Structure

2018
In the present chapter, utilization of XAFS to the electrochemical interfaces is briefly introduced.
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X-ray absorption fine structure and nanostructures

International Journal of Nanotechnology, 2006
The X-ray absorption fine structure (XAFS) is a powerful tool to investigate local atomic structures in matter. The XAFS can select a specific type of atom as a probe atom and measure the structural environments near the probe atom. The XAFS can therefore describe the bond lengths, bond-length distributions and the species of the atoms located around ...
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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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Extended X-Ray Absorption Fine Structure Spectroscopy

1983
Publisher Summary This chapter describes extended x-ray absorption fine structure spectroscopy (EXAFS) spectroscopy with a breadth sufficient to communicate to the non-expert potential of this technique. It discusses the theoretical underpinnings and experimental state of the art with depth sufficient to delineate clearly to a practitioner the ...
T.M. Hayes, J.B. Boyce
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Chapter 4 X-ray absorption fine structure

1996
Publisher Summary This Chapter discusses the experimental advances in X-Ray Absorption (XAS) as a structural probe in a hard X-ray region (> 4 keV). The capabilities of high-brilliance photon sources—that is, insertion devices, for the studies of dilute systems are demonstrated, and the future prospects of a tunable X-ray undulator for the third ...
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Relativistic effects in the x-ray-absorption fine structure

Physical Review B, 1994
A relativistic model for the extended x-ray-absorption fine structure, in which the energy loss of the emitted photoelectron is accounted for by using a complex energy-dependent exchange-correlation potential, has been developed. Relativistic curved-wave single-, double-, and triple-scattering formulas for excitation from any core hole have been found.
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X-Ray Absorption Fine Structure with Polarized X-Rays

Physical Review, 1953
R. Krogstad, W. Nelson, S. T. Stephenson
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