Abstract
The age-momentum correlation (AMOC) technique of positron annihilation spectroscopy has been used to study a gamma-irradiated natural diamond sample. A light-induced reversible change in both the intensity and the lifetime of the trapped positron component in diamond was observed. No signal attributable to positronium was detected in the measurements, supporting the view that positronium formation does not occur in diamond. The measurements demonstrate the sensitivity of positron annihilation to optically active centers in diamond.
Original language | English |
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Pages (from-to) | 198-202 |
Number of pages | 5 |
Journal | Applied Surface Science |
Volume | 116 |
DOIs | |
Publication status | Published - May 1997 |
Externally published | Yes |
Keywords
- Age-momentum correlation
- Diamond
- Gamma-irradiation
- Optical activity
ASJC Scopus subject areas
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films