Electron emission during ion–surface interactions

Structures in electron spectra arising from low energy grazing incidence collisions of ions with single crystal metal surfaces are discussed. Peak-like structures in the kinetic emission spectra for the ion-surface systems H +/Al(1 1 1) and H +/Cu(1 1 0) – previously ascribed to plasmon excitation a...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2001-08, Vol.182 (1), p.1-7
Main Authors: Niehaus, A., Zeijlmans van Emmichoven, P.A., Urazgil'din, I.F., van Someren, B.
Format: Article
Language:English
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Summary:Structures in electron spectra arising from low energy grazing incidence collisions of ions with single crystal metal surfaces are discussed. Peak-like structures in the kinetic emission spectra for the ion-surface systems H +/Al(1 1 1) and H +/Cu(1 1 0) – previously ascribed to plasmon excitation and decay by electron emission – are shown to be probably due to a two-step process: in the first step bulk Bloch-waves of electrons with wave vectors parallel to the surface and energies in the ionization continuum are populated by kinetic emission, and in the second step these Bloch-waves decay by scattering off the surface atoms, leading to interference effects in the scattered electron intensity.
ISSN:0168-583X
1872-9584
DOI:10.1016/S0168-583X(01)00647-4