| LC control no. | sh 85046548 |
|---|---|
| Topical heading | Extended X-ray absorption fine structure |
| Variant(s) | EXAFS (Extended X-ray absorption fine structure) Fine structure, Extended X-ray absorption |
| See also | X-ray absorption fine structure |
| Found in | Jahrman, E.P. Developing laboratory-based x-ray spectroscopies for energy and materials research spectroscopy, 2019: abstr. (X-ray absorption fine structure (XAFS)) p. 9 (two distinct regions in plot of absorption coefficient as a function of incident photon energy: a collection of features in the immediate vicinity of the rise in absorption due to the photoelectric effect and a series of long-range oscillations beyond the edge. The aforementioned regions are referred to as the X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS), respectively) Newville, M. Fundamentals of XAFS, 2004, via WWW, viewed June 5, 2020: p. 1 (X-ray absorption fine structure (XAFS) refers to the details of how x-rays are absorbed by an atom at energies near and above the core-level binding energies of that atom. Specifically, XAFS is the modulation of an atom's x-ray absorption probability due to the chemical and physical state of the atom) p. 2 (The x-ray absorption spectrum is typically divided into two regimes: x-ray absorption near-edge spectroscopy (XANES) and extended x-ray absorption fine-structure spectroscopy (EXAFS)) EXAFS : theory, via LibreTexts website, June 5, 2020 (EXAFS (Extended X-ray Absorption Fine Structure) and XANES (X-Ray Absorption Near Edge structure) are regions of the spectrum obtained from XAS (X-ray Absorption Spectroscopy). EXAFS corresponds to the oscillating part of the spectrum to the right of the absorption edge (appearing as a sudden, sharp peak), starting at roughly 50 eV and extending to about 1000 eV above the edge) |
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