Positronium formation in the n = 2 level in positron scattering from hydrogen and helium atoms
A distorted-wave model (Phys. Rev. A 27, 1904 (1983); 28, 2180 (1983)) is applied to calculate the formation of positronium in the n = 2 states in e/sup +/ scattering from hydrogen and helium atoms. The incident wave is represented by a polarized-orbital method. The first-Born-approximation results of the 2p-excited-state capture cross section in the case of helium is reported for the first time. The first Born approximation is found to be unsuitable for prediction of the rearrangement processes. The present total (ground- and excited-state) positronium-formation cross sections have been compared with the corresponding observed values of Fornari et al. (Phys. Rev. Lett. 51, 2276 (1983)) and of Charlton et al. (J. Phys. B 16, L465 (1983)).
- Research Organization:
- Muralidhar Girls' School, 4 Hindustan Road, Calcutta 700029, West Bengal, India
- OSTI ID:
- 6131405
- Journal Information:
- Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 31:3; ISSN PLRAA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics-- Positronium
Muonium
& Muonic & Mesic Atoms & Molecules
640304 -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
BORN APPROXIMATION
CAPTURE
COLLISIONS
CROSS SECTIONS
DISTORTED WAVE THEORY
ELECTRON CAPTURE
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUIDS
GASES
GROUND STATES
HELIUM
HYDROGEN
NONMETALS
PARTICLE PRODUCTION
POSITRON COLLISIONS
POSITRON-ATOM COLLISIONS
POSITRONIUM
RARE GASES