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Ionization depth distribution in EPMA: improvement of the random walk model

✍ Scribed by G. Castellano; S. Segui; J. Trincavelli

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
382 KB
Volume
27
Category
Article
ISSN
0049-8246

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✦ Synopsis

A model for the parameter c involved in Packwood and BrownÏs expression for the ionization depth distribution /(qz) in EPMA is developed. Assuming that the electrons perform a random walk within the sample, the parameter c is related to the probability of Ðnding an electron in the surface layer after a large number of steps. Despite the simplicity of the model, the resulting c values produce a very good description of /(qz) distributions obtained through Monte Carlo simulations and experimental data.

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