CLOSE-COUPLING CALCULATIONS OF POSITRONIUM FORMATION IN POSITRON-HELIUM SCATTERING

Authors
CHAUDHURI P ADHIKARI SK
Citation
P. Chaudhuri et Sk. Adhikari, CLOSE-COUPLING CALCULATIONS OF POSITRONIUM FORMATION IN POSITRON-HELIUM SCATTERING, Journal of physics. B, Atomic molecular and optical physics, 31(13), 1998, pp. 3057-3063
Citations number
19
Categorie Soggetti
Physics, Atomic, Molecular & Chemical",Optics
Journal title
Journal of physics. B, Atomic molecular and optical physics → ACNP
ISSN journal
09534075
Volume
31
Issue
13
Year of publication
1998
Pages
3057 - 3063
Database
ISI
SICI code
0953-4075(1998)31:13<3057:CCOPFI>2.0.ZU;2-Q
Abstract
Positronium (Ps) formation in positron-helium scattering has been inve stigated in different partial waves at medium energies including the O re gap region using the close-coupling approximation with realistic wa vefunctions for the following states: He(1s1s), He(1s2s), He(1s2p), He (1s3s), He(1s3p), Ps(ls), Ps(2s), Ps(2p). Calculations are reported of rearrangement cross sections to Ps(ls), Ps(2s) and Ps(2p) states for incident positron energies up to 200 eV. The present partial cross sec tions are in good agreement with experimental results and a variationa l calculation in the Ore gap region.