Nonradiative formation of the positron-helium triplet bound state
Journal Article
·
· Physical Review. A
- College of Notre Dame of Maryland, Baltimore, Maryland 21210 (United States)
We have previously calculated the cross section for radiative formation of the interesting bound state consisting of a positron bound to helium, where the atomic electrons are in the triplet spin state. That process uses the metastable triplet helium system as target, and, as expected, it has a very small cross section. In this paper we examine a more probable process in which the state of interest is produced in an exchange rearrangement collision between a positronium atom and the singlet helium ground state: Ps+He({sup 1}S{sup e}){yields}PsHe{sup +}({sup 3}S{sup e})+e{sup -}. The present calculation is done in the plane-wave Born approximation, using simple initial and final wave functions and compares post and prior forms.
- OSTI ID:
- 20982198
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 75; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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