Cross-sections and rates for electron excitation of excited positively-charged hydrogen and hydrogenic ions
- 1 July 1978
- journal article
- research article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 183 (3) , 329-334
- https://doi.org/10.1093/mnras/183.3.329
Abstract
Semi-empirical cross-sections and rates are presented for transitions between highly excited levels of positively-charged hydrogenic ions and hydrogen induced by electron impact. The present results extends previous results obtained for hydrogen by Gee et al., to include positively-charged ions with charge |$Z_3 -1 \gt 0$| which are of importance in stellar atmospheres, and also increases the range of energies and temperatures for which the formulae are valid. Both cross-sections and rates are valid whenever the initial and final quantum numbers satisfy |$n, \enspace n^\prime \geqslant 5$|.Keywords
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