Dependence of the positron reemission probability on the positron work function of a metal surface

E. M. Gullikson, A. P. Mills, C. A. Murray

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

We have measured the probability y of positron reemission from Ni(100) and Cu(111) surfaces as the positron work function + is varied by depositing a fraction of a monolayer of K. We find that y increases monotonically with - +. The measurements agree with either of two possible models: an ion-neutralization mechanism that causes slower positrons to form positronium more effectively, or a positron emission rate proportional to the density of final states of the emitted positron.

Original languageEnglish (US)
Pages (from-to)1705-1708
Number of pages4
JournalPhysical Review B
Volume38
Issue number3
DOIs
StatePublished - 1988
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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