title: Transport properties of the diluted Lorentz slab.
abstract: We study the behavior of a point particle incident on a slab of a randomly diluted triangular array of circular scatterers. Various scattering properties, such as the reflection and transmission probabilities and the scattering time are studied as a function of thickness and dilution. We show that a diffusion model satisfactorily describes the mentioned scattering properties. We also show how some of these quantities can be evaluated exactly and their agreement with numerical experiments. Our results exhibit the dependence of these scattering data on the mean free path. This dependence again shows excellent agreement with the predictions of a Brownian motion model.
authors.affiliation: Centro de Ciencias Fisicas, UNAM, Apdo. Postal 48-3, 62251 Cuernavaca, Morelos, Mexico.
authors.forename: H
authors.initials: H
authors.lastname: Larralde
authors.forename: F
authors.initials: F
authors.lastname: Leyvraz
authors.forename: G
authors.initials: G
authors.lastname: Martínez-Mekler
authors.forename: R
authors.initials: R
authors.lastname: Rechtman
authors.forename: S
authors.initials: S
authors.lastname: Ruffo