Convergence of two-centre expansions in positron-hydrogen collisions

Authors
Kadyrov, AS Bray, I
Citation
As. Kadyrov et I. Bray, Convergence of two-centre expansions in positron-hydrogen collisions, J PHYS B, 33(18), 2000, pp. L635-L640
Citations number
22
Categorie Soggetti
Physics
Journal title
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
ISSN journal
09534075 → ACNP
Volume
33
Issue
18
Year of publication
2000
Pages
L635 - L640
Database
ISI
SICI code
0953-4075(20000928)33:18<L635:COTEIP>2.0.ZU;2-5
Abstract
The question of convergence in two-centre expansions is addressed via the s tudy of positron-hydrogen scattering within the s-wave model. Direct scatte ring, positronium formation, and breakup cross sections are found to conver ge if a sufficient number of states, centred on the hydrogen atom and posit ronium, are used to expand the total scattering wavefunction. Moreover, thi s occurs only if pseudostate expansions are applied to both the atomic and positronium centres.