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Neutralization Rates for Low-Energy Ions Scattered From Solid Surfaces

Published online by Cambridge University Press:  28 February 2011

Elliott A. Eklund,
Richard S. Daley,
Judy H. huang and
R. Stanley Williams
Elliott A. Eklund
Affiliation:
Department of Chemistry & Biochemistry and Solid State Science Center University of California, Los Angeles, CA 90024
Richard S. Daley
Affiliation:
Department of Chemistry & Biochemistry and Solid State Science Center University of California, Los Angeles, CA 90024
Judy H. huang
Affiliation:
Department of Chemistry & Biochemistry and Solid State Science Center University of California, Los Angeles, CA 90024
R. Stanley Williams
Affiliation:
Department of Chemistry & Biochemistry and Solid State Science Center University of California, Los Angeles, CA 90024
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Abstract

Calculations of the angular distributions of scattered ions were used to simulate impact collision ion scattering spectrometry (ICISS) experiments. The calculations were performed first for 2–keV Na+ ions incident on the Pt(111) surface in the <112> azimuth. The fitting of these calculations to the experimental data provided information about the surface structure of the sample and the trajectories of the incident ions. The inclusion of a first-order decay model for Auger neutralization with the calculations for Na+ allowed the simulation of 2-keV Ne+ ions in the ICISS mode on the same Pt surface. From these simulations it was possible to extract the Auger neutralization halflife for Ne+, found to be 1.30 ± 0.10 femtoseconds.

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