Table 2: Comparison of calculated BPRM absolute energies, $E_{\rm c}$, with the observed ones, $E_{\rm o}$, for Fe XX. IJ is the level index for calculated energy position in symmetry $J\pi $. The asterisk next to a J-value indicates that the term has incomplete set of observed fine structure levels.

Level		 J IJ $E_{\rm o}$ (Ry) $E_{\rm c}$ (Ry)

2s22p3		 $\rm ^4S^o$ 1.5 1 115.735 115.80
2s22p3 $\rm ^2D^o$ 2.5 1 114.080 114.19
2s22p3 $\rm ^2D^o$ 1.5 2 114.451 114.54
2s22p3 $\rm ^2P^o$ 1.5 3 112.741 112.85
2s22p3 $\rm ^2P^o$ 0.5 1 113.324 113.43
2s2p4 $\rm ^4P $ 2.5 1 108.833 108.94
2s2p4 $\rm ^4P $ 1.5 1 108.225 108.32
2s2p4 $\rm ^4P $ 0.5 1 108.024 108.12
2s2p4 $\rm ^2D $ 2.5 2 106.002 106.16
2s2p4 $\rm ^2D $ 1.5 2 106.161 106.30
2s2p4 $\rm ^2S $ 0.5 2 104.752 104.91
2s2p4 $\rm ^2P $ 1.5 3 104.314 104.48
2s2p4 $\rm ^2P $ 0.5 3 103.421 103.59
2p5 $\rm ^2P^o$ 1.5 4 97.8132 97.989
2p5 $\rm ^2P^o$ 0.5 2 96.8164 97.008
2s22p2(3P)3s $\rm ^4P $ 2.5* 3 49.4420 49.287
2s22p2(3P)3s $\rm ^4P $ 0.5* 4 50.4616 50.243
2s22p2(1D)3s $\rm ^2D $ 2.5* 4 48.1968 48.093
2s22p2(1S)3s $\rm ^2S $ 0.5 6 46.9768 46.963
2s22p2(3P)3d $\rm ^4F $ 1.5* 8 45.3824 45.888
2s22p2(3P)3d $\rm ^4D $ 0.5* 7 45.3140 45.159
2s22p2(3P)3d $\rm ^4P $ 2.5* 8 44.6892 44.703
2s22p2(3P)3d $\rm ^4P $ 1.5* 10 44.5820 44.703
2s22p2(3P)3d $\rm ^2F $ 3.5* 3 44.3800 44.539
2s22p2(3P)3d $\rm ^2D $ 2.5 9 44.1632 44.329
2s22p2(3P)3d $\rm ^2D $ 1.5 11 44.1718 44.184
2s22p2(1D)3d $\rm ^2D $ 2.5 11 43.4728 43.691
2s22p2(1D)3d $\rm ^2D $ 1.5 13 43.5112 43.637
2s22p2(1D)3d $\rm ^2F $ 3.5 6 43.2888 43.491
2s22p2(1D)3d $\rm ^2F $ 2.5 13 43.0104 43.054
2s22p2(1D)3d $\rm ^2P $ 1.5* 15 42.9780 43.199
2s22p2(1D)3d $\rm ^2S $ 0.5 12 43.0172 42.944
2s22p2(1S)3d $\rm ^2D $ 2.5* 14 42.2322 42.470
2s22p2(1S)3d $\rm ^2D $ 1.5 16 42.1436 42.343
2s22p2(3P)4d $\rm ^4P $ 2.5 38 24.8966 25.767
2s22p2(3P)4d $\rm ^4P $ 1.5 48 24.4402 24.591
2s22p2(3P)4d $\rm ^4P $ 0.5 35 24.6935 24.591
2s22p2(3P)4d $\rm ^4F $ 2.5* 39 24.6674 25.202
2s22p2(3P)4d $\rm ^4D $ 2.5* 40 24.6004 24.746
2s22p2(3P)4d $\rm ^2F $ 3.5 18 24.4444 24.500
2s22p2(3P)4d $\rm ^2F $ 2.5 41 24.3594 25.001
2s22p2(3P)4d $\rm ^2D $ 2.5 42 24.1820 24.500
2s22p2(3P)4d $\rm ^2D $ 1.5 50 24.2070 24.281
2s22p2(1D)4d $\rm ^2D $ 2.5 44 23.2710 23.379
2s22p2(1D)4d $\rm ^2D $ 1.5 52 23.2687 23.489
2s22p2(1D)4d $\rm ^2G $ 3.5* 20 23.3784 23.379
2s22p2(1D)4d $\rm ^2F $ 2.5* 45 23.1110 23.315
2s22p2(1D)4d $\rm ^2P $ 1.5* 53 23.0968 23.315
2s22p2(1S)4d $\rm ^2D $ 2.5 46 22.0780 22.040
2s22p2(1S)4d $\rm ^2D $ 1.5 54 21.9918 22.222
2s22p2(3P)5d $\rm ^4P $ 2.5 71 16.0034 16.198
2s22p2(3P)5d $\rm ^4P $ 1.5 87 15.0865 15.123
2s22p2(3P)5d $\rm ^4P $ 0.5 61 15.0444 15.123
2s22p2(3P)5d $\rm ^4F $ 2.5* 74 15.5370 15.615
2s22p2(3P)5d $\rm ^2F $ 3.5 45 15.1991 15.132
2s22p2(3P)5d $\rm ^2F $ 2.5 75 15.4288 15.579
2s22p2(3P)5d $\rm ^2D $ 2.5* 79 15.1586 15.233
2s22p2(3P)5d $\rm ^4D $ 2.5* 81 15.0284 15.123
2s22p2(1D)5d $\rm ^2G $ 3.5* 53 14.0875 14.166
2s22p2(1D)5d $\rm ^2D $ 2.5 88 14.0321 14166
2s22p2(1D)5d $\rm ^2D $ 1.5 94 14.1017 14.103
2s22p2(1D)5d $\rm ^2F $ 2.5* 89 13.9920 14.021
$\rm 2s22p2(1D)5d$ $\rm ^2P $ 1.5* 95 14.0277 14.021


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