Radial distribution function in x-ray-absorption fine structure

Edward A. Stern, Yanjun Ma, Olivier Hanske-Petitpierre, Charles E. Bouldin

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

It has been argued that, in systems that have disorder too large to be described by a Gaussian, x-ray-absorption fine-structure (XAFS) spectroscopy alone cannot define the radial distribution function (RDF) because of the lack of low-k data. We show that the low-k data can, under certain conditions, be reconstructed using cumulant expansions, which give the correct functional form. This allows XAFS to determine unbiased single-shell RDFs in cases of moderate disorder, without assuming a particular model for the RDF. Some examples are given to illustrate the technique and its limitations.

Original languageEnglish
Pages (from-to)687-694
Number of pages8
JournalPhysical Review B
Volume46
Issue number2
DOIs
StatePublished - 1992
Externally publishedYes

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