TY - JOUR
T1 - Radial distribution function in x-ray-absorption fine structure
AU - Stern, Edward A.
AU - Ma, Yanjun
AU - Hanske-Petitpierre, Olivier
AU - Bouldin, Charles E.
PY - 1992
Y1 - 1992
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0000758623&partnerID=8YFLogxK
U2 - 10.1103/physrevb.46.687
DO - 10.1103/physrevb.46.687
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AN - SCOPUS:0000758623
SN - 0163-1829
VL - 46
SP - 687
EP - 694
JO - Physical Review B
JF - Physical Review B
IS - 2
ER -