Elsevier

Surface Science

Volume 222, Issues 2–3, 3 November 1989, Pages 313-331
Surface Science

Inelastic collisions of kV electrons in solids

https://doi.org/10.1016/0039-6028(89)90362-2Get rights and content

Abstract

We have calculated electron stopping powers and electron inelastic mean free paths in solids for energies between 1 eV and 10 keV above the Fermi energy using the wave-vector- and frequency-dependent energy loss function recently proposed by Penn. In addition, the energy loss distribution and angular distribution necessary for specifying an inelastic scattering event are consistently obtained. By this approach, the energy loss function determined by the experimentally measured optical dielectric data at long wave-length limit was extrapolated to finite wave-length as a sum of infinite terms of Drude-Lindhard type dielectric functions under a single-pole approximation.

It is shown that this method is useful for evaluating inelastic collisions of fast and slow electrons in solids, particularly, in transition metals and noble metals for which the dielectric function of the free electron gas is difficult to be directly extended. Results for the solid media Au, Cu, Ag, Ni and Si are presented.

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    On leave from: Fundamental Physics Center, China University of Science and Technology, Hefei, Anhui, People's Rep. of China.

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