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Published May 2, 2008 | public
Journal Article

The effect of crystalline structure on molecular effect in ion-induced electron emission

Abstract

The results of experimental and theoretical study of the molecular effect in ion-induced electron emission from single crystal and polycrystalline materials are presented. It has been found that the electron emission yield γ_2 under N_2^+ bombardment of a single crystal shows a dependence on ion incidence angle θ, which is analogous to the anisotropy of the yield γ_1 under N^+ impact. The ratio R_2(θ)=γ_2/2_(γ1)<1 exhibits, for single crystals, a drastic angular dependence, which was successfully described on the basis of electron sweeping-out mechanism by conjunction of both the sharp channeling at θ<ψ_L and the shadowing-caused bell-like pattern at θ>ψ_L, the Lindhard angle.

Additional Information

© 2008 Elsevier Ltd. Available online 15 December 2007. This work has been supported by the National project on formation of the system of the innovation education at M.V. Lomonosov Moscow State University.

Additional details

Created:
August 22, 2023
Modified:
October 20, 2023