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Exact thermal and structural damping of the multiple scattering contributions to the XANES

Physica B: Condensed Matter, ISSN: 0921-4526, Vol: 158, Issue: 1, Page: 400-402
1989
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Article Description

We present an exact and efficient method to calculate both thermal and structural damping of the multiple scattering (MS) contributions to the x-ray absorbtion coefficient. Our method, which accouts for the correlations, gives some results which indicate that only for the EXAFS signal the dominat damping is given by a simple Debye-Waller type of correction in the amplitude. In the higher order contribution to total cross section phase effects become important and can alter the effective damping. In the case of structural disorder we show how the MS signal is capable of providing new structural information in such a way to allow us to distinguish between various amorphous structural model.

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