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X-ray absorption spectroscopy (XAS) is a widely used technique for determining the local geometric and/or electronic structure of matter. [1] The experiment is usually performed at synchrotron radiation facilities, which provide intense and tunable X-ray beams. Samples can be in the gas phase, solutions, or solids. [2]
Extended X-ray absorption fine structure (EXAFS), along with X-ray absorption near edge structure , is a subset of X-ray absorption spectroscopy . Like other absorption spectroscopies , XAS techniques follow Beer's law .
X-ray absorption near edge structure (XANES), also known as near edge X-ray absorption fine structure (NEXAFS), is a type of absorption spectroscopy that indicates the features in the X-ray absorption spectra of condensed matter due to the photoabsorption cross section for electronic transitions from an atomic core level to final states in the energy region of 50–100 eV above the selected ...
There exist several efficient designs for analyzing an X-ray emission spectrum in the ultra soft X-ray region. The figure of merit for such instruments is the spectral throughput, i.e. the product of detected intensity and spectral resolving power. Usually, it is possible to change these parameters within a certain range while keeping their ...
The XANES energy region [3] extends between the edge region and the EXAFS region over a 50-100 eV energy range around the core level x-ray absorption threshold. Before 1980 the XANES region was wrongly assigned to different final states: a) unoccupied total density of states, or b) unoccupied molecular orbitals (kossel structure) or c) unoccupied atomic orbitals or d) low energy EXAFS ...
XANES – XANES, synonymous with NEXAFS (near edge X-ray absorption fine structure) XAS – X-ray absorption spectroscopy; X-CTR – X-ray crystal truncation rod scattering; X-ray crystallography; XDS – X-ray diffuse scattering; XES – X-ray emission spectroscopy; XPEEM – X-ray photoelectron emission microscopy; XPS – X-ray photoelectron ...
Pages in category "X-ray absorption spectroscopy" The following 7 pages are in this category, out of 7 total. This list may not reflect recent changes. ...
RIXS is bulk sensitive: the penetration depth of resonant X-ray photons depends on the material and on the scattering geometry, but typically is of the order of a few micrometers in the hard X-rays regime (for example at transition metal K-edges) and on the order of 0.1 micrometers in the soft X-ray regime (e.g. transition metal L-edges). [1 ...