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Title: | Generalized Landauer equation: Absorption-controlled diffusion processes |
Authors: | Godoy, S Micenmacher, V García-Colin, LS |
Issue Date: | 1999 |
Abstract: | The exact expression of the one-dimensional Boltzmann multiple-scattering coefficients, for the passage of particles through a slab of a given material, is obtained in terms of the single-scattering cross section of the material, including absorption. The remarkable feature of the result is that for multiple scattering in a metal, free from absorption, one recovers the well-known Landauer result for conduction electrons. In the case of particles, such as neutrons, moving through a weak absorbing media, Landuer's formula is modified due to the absorption cross section. For photons, in a strong absorbing media, one recovers the Lambert-Beer equation. In this latter case one may therefore speak of absorption-controlled diffusive processes. [S1063-651X(99)01105-8]. |
URI: | http://hdl.handle.net/11154/2665 |
ISSN: | 1063-651X |
Appears in Collections: | Física
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