INVESTIGADORES
TRINCAVELLI Jorge Carlos
artículos
Título:
Ionization depth distribution in EPMA: improvement of the random walk model
Autor/es:
GUSTAVO CASTELLANO; SILVINA SEGUI; JORGE TRINCAVELLI
Revista:
X-RAY SPECTROMETRY
Editorial:
JOHN WILEY & SONS LTD
Referencias:
Año: 1998 vol. 27 p. 293 - 298
ISSN:
0049-8246
Resumen:
A model for the parameter gamma involved in Packwood and BrownÏs expression for the ionization depth distribution Phi(rho z) in EPMA is developed. Assuming that the electrons perform a random walk within the sample, the parameter gamma is related to the probability of finding an electron in the surface layer after a large number of steps. Despite the simplicity of the model, the resulting gamma values produce a very good description of Phi(rho z) distributions obtained through Monte Carlo simulations and experimental data.
