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

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

doi:10.1103/PhysRevB.34.4350

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

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

Phys. Rev. B 34, 4350 – Published 15 September 1986

Abstract

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.

Received 14 April 1986

DOI:https://doi.org/10.1103/PhysRevB.34.4350

Authors & Affiliations

J. J. Rehr

Department of Physics, University of Washington, Seattle, Washington 98195
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

R. C. Albers