Abstract
A single-scattering model is found to explain the near-edge structure in the X-ray absorption spectra of crystalline solids remarkably accurately. Resonances in the X-ray absorption are interpreted as constructive interference at the excitation site, of an outgoing electron wave with waves that are backscattered by Bragg reflection from the surrounding crystal lattice. Model spectra are compared with experimental data for the K-edge absorption of fluorine in CaF 2, and of copper both in its f.c.c. form and as an epitaxial body-centered tetragonal film.
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