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Corrections for the Effect of Scattering on XRF Intensity

Published online by Cambridge University Press:  06 March 2019

J. E. Fernandez ,
V. G. Molinari  and
M. Sumini
J. E. Fernandez
Affiliation:
Laboratorio di Ingegneria Nucleare di Montecuccolino Universita di Bologna Via dei Colli 16, 40136 Bologna, Italy
V. G. Molinari
Affiliation:
Laboratorio di Ingegneria Nucleare di Montecuccolino Universita di Bologna Via dei Colli 16, 40136 Bologna, Italy
M. Sumini
Affiliation:
Laboratorio di Ingegneria Nucleare di Montecuccolino Universita di Bologna Via dei Colli 16, 40136 Bologna, Italy
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Abstract

Corrections for scattering on XRF intensity have commonly used integral approaches and isotropic approximations, which give a limited knowledge on this subject. An exact theoretical expression for XRF enhancement due to coherent and incoherent scattering is presented in this paper. It has been obtained as a solution of the Boltzmann transport equation for photons. This equation describes the diffusion of photons in an infinite homogeneous target. Both the excitation and the emission beams have been assumed to be well collimated. The solution accounts for the mixed, scattering and photoelectric interactions. Complete kernels including atomic form factors have been used for both types of scattering. An appropriate kernel has been written for the photoelectric interaction. The correction is computed for several pure elements and is compared with isotropic approximations.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 33: Thirty-Eighth Annual Conference on Applications of X-ray Analysis, July 31 - August 4, 1989 , 1989 , pp. 553 - 566
Copyright
Copyright © International Centre for Diffraction Data 1989

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