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Table A.1

Atomic energy levels of the oxygen model atom used in this work.

(1) (2) (3) (4) (5)
Level Configuration Energy Statistical
# and term [Ryd] [eV] weight

1 2p 3P 0.0000000 0.0000 9
2 2p 1D 0.1438880 1.9577 5
3 2p 1S 0.3079407 4.1898 1
4 3s 5So 0.6722253 9.1461 5
5 3s 3So 0.6990967 9.5117 3
6 3p 5P 0.7894125 10.741 15
7 3p 3P 0.8069543 10.979 9
8 4s 5So 0.8700480 11.838 5
9 4s 3So 0.8768672 11.930 3
10 3d 5Do 0.8877632 12.079 25
11 3d 3Do 0.8883803 12.087 15
12 4p 5P 0.9030074 12.286 15
13 4p 3P 0.9076500 12.349 9
14 3s 3Do 0.9216869 12.540 15
15 5s 5So 0.9305559 12.661 5
16 5s 3So 0.9332467 12.698 3
17 4d 5Do 0.9373803 12.754 25
18 4d 3Do 0.9377701 12.759 15
19 4f 5F 0.9383157 12.766 35
20 4f 3F 0.9383165 12.766 21
21 5p 5P 0.9443120 12.848 15
22 5p 3P 0.9465332 12.878 9

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