The calculation of ion fractions in LEIS

G. Verbist, H. H. Brongersma, J. T. Devreese

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)


We discuss different ways of calculating ion fractions for LEIS-type experiments: (i) parametrizations, and (ii) quasi-ab-initio models. Among the different parametrizations of the neutralization rates the Hagstrum, Godfrey-Woodruff and the unified model are compared. For surfaces containing different types of atoms, e.g. NaCl, it is not possible to determine the neutralization constants uniquely. This is related to the use of relative ion fractions. For the absolute ion fractions there is a convincing agreement between DISC-experiments for He+ → Si scattering and a theoretical calculation on the basis of the quasi-ab-initio Muda-Newns model.

Original languageEnglish
Pages (from-to)572-575
Number of pages4
JournalNuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
Issue number1-4
Publication statusPublished - 2 Feb 1992


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