Narrow beam emission of slow positrons from negative affinity surfaces

Cherry A. Murray, Allen P. Mills

Research output: Contribution to journalArticlepeer-review

58 Scopus citations


We have measured the angular distribution of the slow positrons (e+·) from negative work function (φ+) surfaces of Cu and Al bombarded by keV e+ in ultrahigh vacuum. In analogy with √-point electrons emitted from negative electron affinity surfaces, the majority (>50%) of the slow e+ leave the surface with energy ≈ φ+ and velocity within ∼20° of the surface normal. This agrees qualitatively with the predictions of a simple 1D model.

Original languageEnglish (US)
Pages (from-to)789-794
Number of pages6
JournalSolid State Communications
Issue number10
StatePublished - Jun 1980
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry


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