Calculation of the total and total ionization cross sections for positron scattering on atomic hydrogen
- Electronic Structure of Materials Centre, The Flinders University of South Australia, G.P.O. Box 2100, Adelaide 5001 (Australia)
- Centre for Atomic, Molecular and Surface Physics, School of Mathematical and Physical Sciences, Murdoch University, Perth 6150 (Australia)
The total and total ionization cross sections for positron scattering on atomic hydrogen are calculated by applying the convergent-close-coupling method to the model where positronium-formation channels are omitted. This model accurately describes the physics of the scattering whenever the positronium formation cross section is negligible, in particular, above 100 eV for this system. The total ionization cross section results in this energy region are in excellent agreement with the recent measurements of Jones [ital et] [ital al]. [J. Phys. B 26, L483 (1993)], and so lie below the earlier measurements of Spicher [Phys. Rev. Lett. 64, 1019 (1990)], and the recent calculations of Acacia [ital et] [ital al]. [Phys. Rev. Lett. (to be published)]. The total cross section is in very good agreement with the recent measurements of Zhou [ital et] [ital al]. (unpublished) down to 30 eV.
- OSTI ID:
- 5091384
- Journal Information:
- Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 49:4; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
COLLISIONS
COMPARATIVE EVALUATIONS
CROSS SECTIONS
DATA
ELEMENTS
ENERGY RANGE
EV RANGE
EVALUATION
EXPERIMENTAL DATA
HYDROGEN
INFORMATION
IONIZATION
NONMETALS
NUMERICAL DATA
POSITRON COLLISIONS
POSITRON-ATOM COLLISIONS
POSITRONIUM
TOTAL CROSS SECTIONS