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Data analysis in extended x-ray-absorption fine structure: Determination of the background absorption and the threshold energy

Boland, John J. and Halaka, Folim G. and Baldeschwieler, John D. (1983) Data analysis in extended x-ray-absorption fine structure: Determination of the background absorption and the threshold energy. Physical Review B, 28 (6). pp. 2921-2926. ISSN 1098-0121. http://resolver.caltech.edu/CaltechAUTHORS:20120706-142629255

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Abstract

Two approaches for the determination of the background absorption (μ_0) in the extended x-ray-absorption fine structure (EXAFS) are presented. Both methods, experimental and computational, take advantage of the damping of the EXAFS amplitude resulting from the convolution with Gaussian functions of different widths. In the experimental method two or more spectra are collected with the use of different spectrometer slit widths, resulting in spectra of different resolutions for the same sample. In the computational approach the convolution is accomplished via a convolution algorithm. The intersection points of the resulting spectra are used to generate μ_0. At the absorption edge, the spectra intersect at a unique point, which is shown to be a measure of the threshold energy, E_0. Illustration of the two methods for background removal is given for a copper-foil sample. The computational approach is superior to the experimental method of damping the EXAFS spectra to give μ_0.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevB.28.2921 DOIUNSPECIFIED
http://link.aps.org/doi/10.1103/PhysRevB.28.2921PublisherUNSPECIFIED
Additional Information:© 1983 The American Physical Society. Received 16 February 1983. The support of the National Science Foundation (Grant No. CHE-81-12589) and the National Institute of Health (Grant No. GM21111-09A) is gratefully acknowledged.
Funders:
Funding AgencyGrant Number
NSFCHE-81-12589
NIHGM21111-09A
Record Number:CaltechAUTHORS:20120706-142629255
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20120706-142629255
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:32288
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:06 Jul 2012 23:34
Last Modified:26 Dec 2012 15:28

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