Electron-impact excitation and ionization cross sections for ground state and excited helium atoms
- Macedonian Academy of Sciences and Arts, P.O. Box 482, 91000 Skopje (Macedonia, The Former Yugoslav Republic of)
- National Institute for Fusion Science, Toki, Gifu-ken 509-52 (Japan)
- ARC Centre for Antimatter-Matter Studies, Murdoch University, 90 South Street, Murdoch, WA 6150 (Australia)
- FOM Institute for Atomic and Molecular Physics, Amsterdam (Netherlands)
Comprehensive and critically assessed cross sections for the electron-impact excitation and ionization of ground state and excited helium atoms are presented. All states (atomic terms) with n{<=}4 are treated individually, while the states with n{>=}5 are considered degenerate. For the processes involving transitions to and from n{>=}5 levels, suitable cross section scaling relations are presented. For a large number of transitions, from both ground and excited states, convergent close coupling calculations were performed to achieve a high accuracy of the data. The evaluated/recommended cross section data are presented by analytic fit functions, which preserve the correct asymptotic behavior of the cross sections. The cross sections are also displayed in graphical form.
- OSTI ID:
- 21159374
- Journal Information:
- Atomic Data and Nuclear Data Tables, Vol. 94, Issue 4; Other Information: DOI: 10.1016/j.adt.2007.11.003; PII: S0092-640X(08)00014-4; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0092-640X
- Country of Publication:
- United States
- Language:
- English
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