Close-coupling calculations of elastic and inelastic positron-helium scattering

Authors
Chaudhuri, P Adhikari, SK
Citation
P. Chaudhuri et Sk. Adhikari, Close-coupling calculations of elastic and inelastic positron-helium scattering, J PHYS B, 32(1), 1999, pp. 129-136
Citations number
19
Categorie Soggetti
Physics
Journal title
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
ISSN journal
09534075 → ACNP
Volume
32
Issue
1
Year of publication
1999
Pages
129 - 136
Database
ISI
SICI code
0953-4075(19990114)32:1<129:CCOEAI>2.0.ZU;2-X
Abstract
Elastic and inelastic positron-helium scattering have been investigated in different partial waves at medium energies using the close-coupling approxi mation with realistic wavefunctions employing the following states: He(1s1s ), He(1s2s), He(1s2p), He(1s3s), He(1s3p), Ps(1s), Ps(2s) and Ps(2p). All e xcitations of the helium atom are in the spin-singlet electronic state. Cal culations are reported of cross sections to He(1s1s), He(1s2s), and He(1s2p ) transitions for incident positron energies up to 200 eV. These cross sect ions are in good agreement with experimental results.