Energy-Resolved Positron Annihilation in Flight in Solid Targets
Journal Article
·
· Physical Review Letters
- Department of Physics, Washington State University, Pullman, Washington 99164 (United States)
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States)
Energy-resolved two-quantum annihilation in flight of positrons with energies ranging from 10 to 71.6 keV was observed. An energy-dispersive two-detector coincidence system was used to observe the sum and difference energies of the {gamma} rays from annihilating positron-electron pairs. For positrons penetrating carbon foils the c/v dependence of the annihilation cross section is confirmed. Spectra obtained from gold-coated carbon foils show evidence of in-flight annihilation with gold M-shell electrons. (c) 1999 The American Physical Society.
- OSTI ID:
- 20217986
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 22 Vol. 83; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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