Dielectronic satellite spectra for highly charged helium-like ions - VI. Iron spectra with improved inner-shell and helium-like excitation rates
Open Access
- 1 January 1982
- journal article
- research article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 198 (1) , 239-254
- https://doi.org/10.1093/mnras/198.1.239
Abstract
The atomic theory developed through earlier papers in this series is extended in order to improve the understanding of iron solar flare spectra in the region 1.85–1.88 Å. The new work concerns impact excitation by distorted wave theory for the inner-shell Fe XXIV transitions and the 1s2 – 1s 2l transitions in Fe XXV. In addition, rates are evaluated for contributions to the Fe XXV lines from cascade, radiative recombination, dielectronic recombination, and inner-shell ionization of Fe XXIV. The results will be applicable to any plasma with a density below 1015 cm−3, and are therefore of use in Tokamak devices as well as in astrophysics.Keywords
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