Positron binding to calcium, a configuration interaction study

Citation
Mwj. Bromley et J. Mitroy, Positron binding to calcium, a configuration interaction study, J PHYS B, 33(9), 2000, pp. L325-L331
Citations number
42
Categorie Soggetti
Physics
Journal title
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
ISSN journal
09534075 → ACNP
Volume
33
Issue
9
Year of publication
2000
Pages
L325 - L331
Database
ISI
SICI code
0953-4075(20000514)33:9<L325:PBTCAC>2.0.ZU;2-3
Abstract
The configuration interaction (CI) method is applied to the study of the po sitron-calcium system. A large basis CI investigation shows that positronic calcium, e(+)Ca, is stable with a binding energy of 0.220 eV and an annihi lation rate of 0.64 x 10(9) s(-1). The stability of e(+)Ca suggests that th e heavier group it elements could also bind a positron, and positron bindin g to strontium can be regarded as highly likely. The possibility of experim ental detection is discussed.