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Coulomb bound states and ion neutralization in ESD

Authors
Journal
Surface Science Letters
0167-2584
Publisher
Elsevier
Publication Date
Volume
173
Issue
1
Identifiers
DOI: 10.1016/0167-2584(86)90740-1

Abstract

Abstract Excited states with two holes and one electron (2h-1e states) are known to be crucial in electron stimulated desorption. Starting with a positively ionized adsorbate (1h state), we show in this note that two-hole one-electron states (2h-1e) can be generated by means of an Auger-like mechanism. Explicitly, when the Coulomb interaction between the adsorbate hole and the d-band of a transition metal surface is stronger than a critical value, a bound state is formed between the adsorbed hole and electron-hole pairs. Charge transfer to the adsorbate affinity level is strongly suppressed.

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