Angular distribution of electrons scattered by He+
- 14 July 1983
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 16 (13) , 2399-2404
- https://doi.org/10.1088/0022-3700/16/13/013
Abstract
Theoretical results are given for the angular distribution of low-energy electrons scattered in collisions with He+ in which the 1s state is excited to the 2s state. The distribution was calculated using T matrices obtained from R-matrix calculations with three states 1s, 2s, 2p and also with six states 1s, 2s, 2p, 3s, 3p, 3d. In both approximations for low electron energies the differential cross section is largest for backward scattering with a maximum at approximately 90 degrees . This disagrees with early calculations of the differential cross section obtained using the distorted-wave approximation.Keywords
This publication has 11 references indexed in Scilit:
- Photoionisation of heliumJournal of Physics B: Atomic and Molecular Physics, 1982
- A new program to calculate differential and total cross sections for electron-atom or ion scattering using the momentum transfer formalismComputer Physics Communications, 1982
- Electron impact excitation of the n=2 states of He+Journal of Physics B: Atomic and Molecular Physics, 1979
- A new version of the general program to calculate atomic continuum processes using the r-matrix methodComputer Physics Communications, 1978
- Electron Impact Excitation of Positive IonsPublished by Elsevier ,1976
- Electron impact on H and He+. II. Coupling effect in the distorted wave polarized orbital approximationJournal of Physics B: Atomic and Molecular Physics, 1974
- A measurement of cross sections for the 1S-2S excitation of He+ions by electron impactJournal of Physics B: Atomic and Molecular Physics, 1973
- Angular Momentum Transfer in the Theory of Angular DistributionsPhysical Review A, 1972
- The excitation of He+ by electron impactJournal of Physics B: Atomic and Molecular Physics, 1969
- A measurement of the cross section for production of He + (2 S ) ions by electron impact excitation of ground state helium ionsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1966