x-ray absorption fine structure


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x-ray absorption fine structure

[‚eks ‚rā əb¦sorp·shən ¦fīn ′strək·chər]
(spectroscopy)
The structure in the x-ray absorption spectrum of a substance at energies above the absorption edge, including both the x-ray absorption near-edge structure and the extended x-ray absorption fine structure. Abbreviated XAFS.
References in periodicals archive ?
Albers, "Theoretical approaches to x-ray absorption fine structure," Reviews of Modern Physics, vol.
For tungsten, about five full cycles of the x-ray absorption fine structure were observed and found to be in excellent agreement with the predictions of real-space multiple scattering with the minor exception of the shape of the second peak.
Results from molecular calculations in [BaC.sub.60] (30) and [BaO.sub.2] (7) show the giant dipole resonance of atomic barium has x-ray absorption fine structure due to modulation of the molecular environment.
Zabinsky, X-ray absorption fine structure in embedded atoms, Phys.
Costa, Extended X-ray absorption fine structure (EXAFS) studies on calcium in crystalline and amorphous solids of biological interest, Cell Calcium 2, 251-262 (1981).
Utilizing partial electron yield and fluorescence yield detection, surface ([approximately equal to]2 nm) and bulk ([approximately equal to]200 nm) structure and chemistry can be recorded simultaneously utilizing soft x-ray near-edge X-ray absorption fine structure (NEXAFS) (33).
At the time of this writing, two additional NIST-responsible instruments are being commissioned: x-ray topography and x-ray absorption fine structure. A third, x-ray microtomography, is still under development.
Wickenden, Extended x-ray absorption fine structure study of [Al.sub.x][Ga.sub.1-x]N films, Appl.
XAS is usually divided into the extended x-ray absorption fine structure (EXAFS) with photoelectron energies above approximately 70 eV, and the x-ray absorption near edge structure (XANES) in the 0 eV to 70 eV range.