e+-He scattering using an integral form of the close-coupling approximation
- 1 October 1975
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 8 (14) , 2377-2389
- https://doi.org/10.1088/0022-3700/8/14/021
Abstract
An integral form of the close-coupling approximation by Ghosh and Basu (1973) and Chaudhuri at al. (1974) has been employed to investigate the processes e++He(1s2) to e++He(2s2) and e++He(1s2) to (e+e-)+He(1s). Couplings of the excited states of both the helium and positronium atoms have been neglected. Results obtained by using an approximate form of the close-coupling approximation which neglects some strong distortion effects are presented. The results in two-state close-coupling approximation do not show good agreement with the experimental findings below the positronium formation threshold. The effect of exchange of electrons is found to be appreciable in the low-energy region.Keywords
This publication has 24 references indexed in Scilit:
- scattering for a wider range of energyPhysical Review A, 1974
- A calculation for the scattering of low-energy positrons by Helium atomsThe European Physical Journal A, 1974
- S-wave positron scattering by hydrogen atomsJournal of Physics B: Atomic and Molecular Physics, 1973
- Extended Polarization Potential: Applications to Atomic ScatteringPhysical Review B, 1968
- Positronium formation by positron impact on hydrogenProceedings of the Physical Society, 1967
- Coupled equations for rearrangement collisions. IIAnnals of Physics, 1966
- Positronium formation by fast positrons in atomic hydrogenProceedings of the Physical Society, 1964
- Elastic Scattering of Low-Energy Electrons by Atomic HydrogenPhysical Review B, 1962
- The Elastic Scattering of Positrons by Atomic Hydrogen and HeliumProceedings of the Physical Society, 1961
- On the theory of elastic collisions between electrons and hydrogen atomsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1960