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Calculation of X-ray absorption structure above K-edge of laser shock-compressed aluminum

Published online by Cambridge University Press:  09 March 2009

A. Djaoui ,
T. A. Hall ,
R. C. Albers ,
J. J. Rehr  and
J. Mustre
A. Djaoui
Affiliation:
Department of Physics, University of Essex, Colchester, CO4 3SQ, UK
T. A. Hall
Affiliation:
Department of Physics, University of Essex, Colchester, CO4 3SQ, UK
R. C. Albers
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, New Mexico 87545
J. J. Rehr
Affiliation:
Department of Physics, FM-15 University of Washington, Seattle, Washington 98195
J. Mustre
Affiliation:
Department of Physics, FM-15 University of Washington, Seattle, Washington 98195
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Abstract

Aluminum sandwich foils can be compressed to more than twice the normal density by the use of shock waves generated by laser beams. We present calculations of the K-edge absorption structure of two fold compressed aluminum, and compare the results with experimental data. The atomic potential is calculated using a spherical band-structure model with Fermi-Dirac statistics for the electrons. The structure above the K-edge is calculated according to the Müller-Shaich formula for the propagating photo-electron. The mean free path of the electron is taken into account through a complex exchange correlation potential. An appropriate Debye-Waller factor is used to represent the effect of the relatively high temperature encountered in these experiments.

Type
Research Article
Information
Laser and Particle Beams , Volume 8 , Issue 1-2 , January 1990 , pp. 319 - 325
Copyright
Copyright © Cambridge University Press 1990

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References

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