The 11S to 23S and 11S to 23P excitation of helium by electron impact
- 14 June 1979
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 12 (11) , 1861-1872
- https://doi.org/10.1088/0022-3700/12/11/012
Abstract
The R-matrix method calculations of Berrington et al. (1975) and Fon et al. (1978) are extended to the calculation of the integrated and differential cross sections for electron excitation of the ground-state helium atom to the 23S and 23P states in the energy ranges (21.4<or=E<or=30 eV) and (80<or=E<or=200 eV). For intermediate energies (30<or=E<or=80 eV) pseudo-resonances arise which make accurate cross sections difficult to calculate and this region is therefore not considered. The calculations are compared with recent theoretical calculations of the mutual angle with the nuclear charge has been fitted by.Keywords
This publication has 29 references indexed in Scilit:
- The R-Matrix Theory of Atomic ProcessesPublished by Elsevier ,1976
- Scattering of electrons by hydrogen atoms at intermediate energies: total and differential cross sections for excitation of n=2 statesJournal of Physics B: Atomic and Molecular Physics, 1975
- Low energy scattering of electrons by helium atomsJournal of Physics B: Atomic and Molecular Physics, 1975
- The use of second-order potentials in the theory of scattering of charged particles by atoms. IX. The excitation of hydrogen and helium to the n=2, S levels by electron impactJournal of Physics B: Atomic and Molecular Physics, 1975
- Scattering of electrons by hydrogen atoms at intermediate energiesPhysical Review A, 1974
- Polarized pseudo-states for low energy electron-atom scatteringJournal of Physics B: Atomic and Molecular Physics, 1974
- Total electron-impact excitation cross sections of heliumChemical Physics Letters, 1972
- Electron scattering by complex atomsJournal of Physics B: Atomic and Molecular Physics, 1971
- Electron scattering by atomic hydrogen using a pseudostate expansion. III. Excitation of 2s and 2p states at intermediate energiesJournal of Physics B: Atomic and Molecular Physics, 1970
- Correlation in the elastic and inelastic S-wave scattering of electrons by H and He+Proceedings of the Physical Society, 1966