New high-energy approximation for x-ray-absorption near-edge structure

J. J. Rehr, R. C. Albers, C. R. Natoli, E. A. Stern

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Spherical-wave corrections in x-ray-absorption fine structure (XAFS) are incorporated using a novel high-energy approximation which replaces the plane-wave approximation and is found to be in excellent agreement all the way to the absorption edge. The single-scattering theory of XAFS is recovered in terms of distance-dependent backscattering amplitudes. Application to the K-shell XAFS of Cu yields results in close agreement with the corresponding exact treatment. Multiple-scattering contributions in XAFS and spherical-wave corrections in angle-resolved photoemission are treated similarly.

Original languageEnglish
Pages (from-to)4350-4353
Number of pages4
JournalPhysical Review B
Issue number6
StatePublished - 1986
Externally publishedYes


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