Trajectory-dependent resonant neutralization of low energy 7Li+ scattered from clean and Na-covered Al(100)

1 July 1993

journal article
Published by American Vacuum Society in Journal of Vacuum Science & Technology A

Vol. 11 (4) , 2260-2265
https://doi.org/10.1116/1.578358

Abstract

Trajectory‐dependent neutralization is observed for low energy (1–5 keV) 7Li+ ions scattered at large angles from Na‐covered Al(100). Energy spectra and angular scans of the scattered Li+ ion yield are collected as a function of Na coverage. Li+ ions are partially neutralized upon single scattering from Al sites and completely neutralized when scattered from Na. This site‐specific neutralization indicates that the surfaceelectrostatic potential is nonuniform. The neutralization probability is also shown to be a function of the exit angle from the surface. The results are analyzed using theoretical ion fractions based on a semiclassical resonant charge exchange model.

Keywords

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