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|Title:||Multiple-electron excitation in X-ray absorption: a simple generic model|
Lindsay, J. D.
Gurman, Steve J.
|Publisher:||International Union of Crystallography|
|Citation:||Journal of Synchrotron Radiation, 2001, 8 (4), pp. 1103-1108.|
|Abstract:||The probability of multiple-electron excitation in X-ray absorption is calculated using a simple generic model. The model permits calculations to be made for all atoms with little input data or computing effort. The high-energy limit of this probability, which gives the usual EXAFS amplitude reduction factor, is calculated in the `sudden approximation' using Slater orbitals. Good agreement with experiment is found. The energy dependence of this probability is also calculated using a simple model form of perturbing potential and found to agree well with experiment for rare gas atoms. The effect on the X-ray absorption coefficient of including multiple-electron excitations is also determined and is found to be small, again in agreement with observation.|
|Rights:||This is an authorised electronic reprint of the paper published as Journal of Synchrotron Radiation, 2001, 8 (4), pp. 1103-1108. This paper is available from http://www3.interscience.wiley.com/journal/118980006/abstract. Doi: 10.1107/S0909049501008160|
|Appears in Collections:||Published Articles, Dept. of Physics and Astronomy|
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