Atomic data for Fe XXII
Abstract
Intermediate coupling energy levels, oscillator strengths and electron collision strengths in the distorted wave approximation have been computed for Fe XXII. Results are tabulated for the configurations 2s22p, 2s 2p2, 2s23s, 2s23d, 2s 2p 3p, 2s24s, 2s24d, 2s 2p 4p. The level population of the excited level in the ground configuration is given as a function of electron density together with theoretical intensity ratios for the strongest transitions from the excited configurations. The theoretical results are compared to available solar flare observations. The intensity ratios observed correspond to electron densities of less than 10 to the 13 per cu cm.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- May 1980
- DOI:
- 10.1093/mnras/191.3.631
- Bibcode:
- 1980MNRAS.191..631M
- Keywords:
-
- Atomic Energy Levels;
- Iron;
- Line Spectra;
- Solar Flares;
- Solar Spectra;
- Electron Density Profiles;
- Electron Scattering;
- Population Theory;
- X Ray Spectra;
- Astrophysics