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XAFSX-Ray Absorption Fine Structure
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More structural information can be obtained from the oscillation in the Extended X-Ray Absorption Fine Structure (EXAFS) which is extended far behind the absorption edge.
NEXAFS (or XANES)--Near-Edge X-ray Absorption Fine Structure
The new measurement was sufficiently precise to allow determination of the x-ray absorption fine structure (XAFS).
However, Extended X-Ray Absorption Fine Structure (EXAFS) studies indicate that local order is only around 3.
Techniques which have been transformed with the use of synchrotron radiation include: X-ray absorption spectroscopies such as Extended X-ray Absorption Fine Structure (EXAFS) and Near-edge X-ray Absorption Fine Structure (NEXAFS) of solids (crystalline or amorphous), liquids and solution, gases, surfaces, and interfaces; Photoelectron and Auger spectroscopy of gases, solids and surfaces; X-ray diffraction (XRD) of solids (powders, single crystals, non-crystalline materials) including small angle X-ray scattering (SAXS) from polymers, composites, and biological materials.
X23A2 serves a large x-ray absorption fine structure (XAFS), diffraction anomalous fine structure (DAFS), and x-ray spectroscopy community.
Developed at the University of Washington, FEFF is an automated program for ab initio multiple scattering calculations of X-ray Absorption Fine Structure (XAFS) and X-ray Absorption Near-Edge Structure (XANES) spectra for clusters of atoms.
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.