Abstract
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 language | English (US) |
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Pages (from-to) | 789-794 |
Number of pages | 6 |
Journal | Solid State Communications |
Volume | 34 |
Issue number | 10 |
DOIs | |
State | Published - Jun 1980 |
Externally published | Yes |
ASJC Scopus subject areas
- General Chemistry
- Condensed Matter Physics
- Materials Chemistry