Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-18T08:54:01.855Z Has data issue: false hasContentIssue false

Multiple Scattering Contributions of Thin Films in Reflection Geometry

Published online by Cambridge University Press:  06 March 2019

J.E. Fernández
Affiliation:
Laboratorio di Ingegneria Nucleare di Montecuccolino University of Bologna Via dei Colli 16, 40136 Bologna, ITALY
R. Sartori
Affiliation:
Laboratorio di Ingegneria Nucleare di Montecuccolino University of Bologna Via dei Colli 16, 40136 Bologna, ITALY
Get access

Abstract

The multiple scattering contributions to the emitted intensity of a thin homogeneous sample under X-Ray excitation are studied with recourse to the Boltzmann transport theory. The corrective terms to the XRF characteristic line due to a second collision of either the photoelectric effect (secondary XRF), or the Compton, or the Rayleigh scattering, are deduced for reflection geometry. Analytical expressions for the intensities are given that allow their computation for variable incidence and take-off beam directions and source wavelength.

Type
XI. Thin-Film and Surface Characterization by XRS and XPS
Copyright
Copyright © International Centre for Diffraction Data 1991

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Fernández, J. E., Molinari, V. G. and M. Sumini, Effect of X-Ray scattering anisotropy on the diffusion of photons in the frame of the transport theory, Nucl. Instr. and Meth. in Phys, Res. A 280: 212 (1989).Google Scholar
2. Fernández, J. E. and Molinari, V. G., X-Ray photon spectroscopy calculations, in: “Advances in Nuclear Science and Technology,” Vol 22, 45-92, M. Becker and J. Lewins eds., Plenum Press, New York (1991).Google Scholar
3. Fernández, J. E., Molinari, V. G. and Sumini, M., Corrections for the effect of scattering on XRF intensity, in: “Advances in X-Ray Analysis,” Vol 33, C.S. Barrett at al. eds , Plenum Press, New York (1990).Google Scholar
4. Fernández, J. E., Rayleigh and Coinpton scattering contributions to the XRF intensity, X-Ray Spectrom. (1991), to be published.Google Scholar
5. Fernández, J. E., XRF Intensity in the frame of transport theory, X-Ray Spectrom. 18:271 (1989).Google Scholar
6. de Boer, D.K.G., Calculation of X-Ray fluorescence intensities from bulk and multilayer samples, X-Ray Spectrom. 19:145 (1990).Google Scholar
7. Press, W. H., Flannery, B. P., Teukolsky, S. A. and Vetterling, W. T., ‘Numerical Recipes. The Art of Scientific Computing,” Cambridge University Press, Cambridge (1986).Google Scholar
8. Cody, H. J. and Thacher, H. C. Jr., Chebyshev approximations for the exponential- integral Ei(x), Math. Comp. 22: 289 (1968).Google Scholar
9. Cody, W. J. and Thacher, H. C. Jr., Rational Chebyshev approximations for the exponential-integral E(x), Math. Comp, 22: 641 (1968).Google Scholar