Positron Annihilation with Inner-Shell Electrons in Noble Gas Atoms
Journal Article
·
· Physical Review Letters
- Physics Department, University of California, San Diego, La Jolla, California 92093-0319 (United States)
- School of Physics, University of New South Wales, Sydney 2052 (Australia)
Measurements are presented of the Doppler broadening of the 511-keV {gamma} -ray line from thermalized positrons annihilating with Ar, Kr, and Xe. The experiments are conducted at low pressures using positrons stored in a Penning-Malmberg trap, which ensures that only two-body interactions are involved. The contributions from annihilation on inner-shell electrons are studied quantitatively in an isolated atomic system for the first time. The spectra are compared with theoretical calculations using a simple Hartree-Fock model to identify the inner-shell contributions. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 531886
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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