Total cross sections for electron impact excitation of the 1s to 2p and 1s to 2s transitions in atomic hydrogen
- 1 January 1986
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 19 (2) , L53-L58
- https://doi.org/10.1088/0022-3700/19/2/003
Abstract
Differences between the recent pseudostate calculations of Callaway (1985), Bransden et al. (1985) and van Wyngaarden and Walters (1985) of the total 1s to 2p and 1s to 2s cross sections at 54.4 eV are explained; it is shown that the cross sections of van Wyngaarden and Walters are probably the most reliable. The importance of d-state couplings is highlighted. A tabulation of the 2p cross section by Callaway in the energy range 12.2-54.4 eV is revised and an analytic fit to the 2p cross section above 12.2 eV is given. It is shown that the revised tabulation and the cross sections of van Wyngaarden and Walters at 100 and 200 eV are in quite good agreement with the relative experimental measurements of Long et al. (1968) at energies between 13.4 and 200 eV. In contrast, the absolute measurement of the 2p cross section by Williams (1981) at 54.4 eV is in disagreement with theory.Keywords
This publication has 10 references indexed in Scilit:
- State multipoles for the n=1 to n=2 excitation of atomic hydrogen by electron impactJournal of Physics B: Atomic and Molecular Physics, 1985
- Scattering of electrons by atomic hydrogen at intermediate energies: Elastic scattering andn=2excitation from 12 to 54 eVPhysical Review A, 1985
- Extended coupled-channels calculations for electron-hydrogen scatteringPhysical Review A, 1985
- Momentum-space coupled-channels optical method for electron-atom scatteringPhysical Review A, 1983
- Electron-photon angular correlations from the electron impact excitation of the 2s and 2p electronic configurations of atomic hydrogenJournal of Physics B: Atomic and Molecular Physics, 1981
- Elastic scattering of electrons by atomic hydrogen at intermediate energiesJournal of Physics B: Atomic and Molecular Physics, 1981
- Electron scattering by atomic hydrogen: the distorted-wave second Born approximationJournal of Physics B: Atomic and Molecular Physics, 1980
- Polarization of Lyman-Radiation Emitted in Electron Collisions with Hydrogen Atoms and MoleculesPhysical Review A, 1970
- Electron impact excitation of hydrogen Lyman-a radiationJournal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1968
- The excitation of atomic hydrogen by electron impactProceedings of the Physical Society, 1966