Lifetime Measurements with a Scanning Positron Microscope
Journal Article
·
· Physical Review Letters
First lifetime results obtained with a scanning positron microscope will be presented. A pulsed positron beam with a variable energy from 0.5 to 20keV, with a spot diameter of 2 {mu}m , can be electronically scanned over an area of 0.6 x 0.6 mm{sup 2} . This beam is formed after a double-stage stochastic cooling (moderation) of positrons emitted from a radioactive isotope. Included in the system is a conventional scanning electron microprobe for surface analysis. Three-dimensional positron lifetime spectra of a GaAs sample with a small surface scratch reveal the range due to the mechanical damage.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40277388
- Journal Information:
- Physical Review Letters, Vol. 87, Issue 6; Other Information: DOI: 10.1103/PhysRevLett.87.067402; Othernumber: PRLTAO000087000006067402000001; 047131PRL; PBD: 6 Aug 2001; ISSN 0031-9007
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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