Improved theoretical line ratios for Ciii in the Sun |
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| Authors: | F P Keenan K A Berrington |
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| Institution: | (1) The Department of Applied Mathematics and Theoretical Physics, The Queen's University of Belfast, BT 7 INN Belfast, N. Ireland |
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| 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(2p
2 3
P
e
- 2s2p
3
P
°)/I(2s2p
1
P
° - 2s
2 1
S
e
) and R
2=I(2p
2 1
S
e
- 2s2p
1
P
°)/I(2p
2 3
P
e
- 2s2p
3
P
°) 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. |
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| Keywords: | |
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