Direct evidence for Coulombic ejection of electron-desorbed ions

Peter Williams, Greg Gillen

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

We have measured energy distributions for F+ and F2+ ions, electron-desorbed from fluorine impurities on an aluminum surface and for Cl+ Cl2+ and I+ I2+ electron-desorbed from alkali halide surfaces by 12.5 keV electrons. The mean energies of the doubly-charged ions are twice the energies of the respective singly-charged ions. This result provides the first direct evidence for the Coulombic expulsion mechanism in electron-stimulated desorption proposed by Knotek and Feibelman.

Original languageEnglish (US)
Pages (from-to)L109-L112
JournalSurface Science
Volume180
Issue number1
DOIs
StatePublished - Feb 1 1987

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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