RADIAL-DISTRIBUTION FUNCTION IN X-RAY-ABSORPTION FINE-STRUCTURE

被引：69

作者：

STERN, EA ^{[1
]}

MA, YJ ^{[1
]}

HANSKEPETITPIERRE, O ^{[1
]}

BOULDIN, CE ^{[1
]}

机构：

[1] NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.46.687

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 RDF's in cases of moderate disorder, without assuming a particular model for the RDF. Some examples are given to illustrate the technique and its limitations.

引用

页码：687 / 694

页数：8

共 40 条

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