Positronium-hydrogen atom elastic scattering at medium energies

Authors
Adhikari, SK Mandal, P
Citation
Sk. Adhikari et P. Mandal, Positronium-hydrogen atom elastic scattering at medium energies, J PHYS B, 33(20), 2000, pp. L761-L765
Citations number
35
Categorie Soggetti
Physics
Journal title
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
ISSN journal
09534075 → ACNP
Volume
33
Issue
20
Year of publication
2000
Pages
L761 - L765
Database
ISI
SICI code
0953-4075(20001028)33:20<L761:PAESAM>2.0.ZU;2-U
Abstract
We study the elastic scattering of positronium atoms by hydrogen atoms at m edium energies using partial-wave Born-Oppenheimer (BO) exchange amplitudes and report accurate BO cross sections in the energy range 0 to 60 eV. The present BO results agree with a 22-state R-matrix and a five-state coupled- channel model potential calculation, but disagree strongly with a conventio nal close-coupling calculation as well as its input BO amplitudes at medium energies.