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 language | English (US) |
---|---|
Pages (from-to) | 1705-1708 |
Number of pages | 4 |
Journal | Physical Review B |
Volume | 38 |
Issue number | 3 |
DOIs | |
State | Published - 1988 |
Externally published | Yes |
ASJC Scopus subject areas
- Condensed Matter Physics