Estimation of uncertainties in XAFS data

被引:49
作者
Newville, M [1 ]
Boyanov, BI
Sayers, DE
机构
[1] Univ Chicago, Consortium Adv Radiat Sources, Chicago, IL 60637 USA
[2] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA
关键词
XAFS analysis; error analysis; Fourier transform;
D O I
10.1107/S0909049598018147
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
The estimate of measurement uncertainties in XAFS spectra is one of the most important and difficult aspects of error analysis for XAFS data. Since several different analysis methods are used to determine structural parameters and their uncertainties from XAFS data, and no universally agreed-upon standard exists, the ability to compare estimates of uncertainties from different methods is vital. We discuss numerical aspects of the propagation of measurement uncertainties from raw absorption coefficient to analyzed signal in k- and R-space. We focus our attention on the conversion of measurement uncertainties between k- and R-space representations of XAFS data, and on the testing of this conversion procedure for data dominated by random fluctuations.
引用
收藏
页码:264 / 265
页数:2
相关论文
共 3 条
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Brigham E.O., 1974, FAST FOURIER TRANSFO
[2]  
LYTLE FW, 1989, PHYSICA B, V158, P701
[3]  
SAYERS DE, 1988, CHEM ANAL, V92, P211