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X-Ray Emission from Porous Materials : New Results

Published online by Cambridge University Press:  02 July 2020

Raynald Gauvin
Raynald Gauvin*
Affiliation:
Département de génie mécanique, Université de Sherbrooke, Sherbrooke, Québec, CanadaJ1K 2R1
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Extract

This paper present new results about x-ray emission from porous materials obtained from Monte Carlo simulations. This is an update from the results which have been presented for the first time last year. In particular, the absorption correction is now simulated in the same way as the electron scattering. In the results presented last year, x-ray absorption was calculated with the integration of the φ(ρz) curves via the usual equation :

where I is the intensity emitted from the porous specimen, I0 is the intensity emitted from a thin foil with no porosity, x is the mass absorption coefficient times the cosine of the take off angle, z is the depth in the specimen and ρ is the density of the porous materials. Since the density term does not include the effect of the size of the pores, integration of this equation will give wrong results when the size of the pores are big relative to the electron range.

Type
30 Years of Energy Dispersive Spectrometry in Microanalysis
Information
Microscopy and Microanalysis , Volume 4 , Issue S2: Proceedings: Microscopy & Microanalysis '98, Microscopy Society of America 56th Annual Meeting, Microbeam Analysis Society 32nd Annual Meeting, Atlanta, Georgia July 12-16, 1998 , July 1998 , pp. 206 - 207
Copyright
Copyright © Microscopy Society of America

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References

1Gauvin, R. (1997), "X-Ray Emission of Porous Materials in the Scanning Electron Microscope Computed Using Monte Carlo Simulations", Microscopy & Microanalysis, Vol. 3, Sup. 2, pp. 883–884.CrossRefGoogle Scholar