Improved theoretical line ratios for C iii in the Sun
Abstract
The recent twelve-state R-matrix calculations of electron excitation rates in CIII by Berrington are used to derive level populations applicable to the solar transition region. Line ratios R = I(2p2 3Pe - 2s2p3P°)/I(2s2p1P° - 2s2 1Se) and R2=I(2p2 1Se - 2s2p1P°)/I(2p2 3Pe - 2s2p3P°) deduced from these data in conjunction with the relevent transition probabilities are found to be in much better agreement with the observed quiet Sun values than those determined from the level population calculations of Keenan et al.
- Publication:
-
Solar Physics
- Pub Date:
- September 1985
- DOI:
- 10.1007/BF00157295
- Bibcode:
- 1985SoPh...99...25K
- Keywords:
-
- Carbon;
- Line Spectra;
- Solar Spectra;
- Matrices (Mathematics);
- Transition Probabilities;
- Solar Physics;
- Level Population;
- Transition Region;
- Electron Excitation;
- Solar Transition;
- Line Ratio