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Table 4:

The lowest $\Delta n_{{\rm c}} = 0$ core excitation thresholds (in Rydbergs) for V VI and Cr VII.
    ${\rm V}^{5+}$   ${\rm Cr}^{6+}$
K Config. Level(mix) Presenta NISTb MCHFc   Level(mix) Presenta NISTb MCHFc
1 $\rm 3s^{2}3p^{6} $ $\rm {}^{1}\hspace*{-.5mm}S_{0}~(96.4\%)$ 0.000000 0.000000 0.000000   $\rm {}^{1}\hspace*{-.5mm}S_{0}~(96.6\%)$ 0.000000 0.000000 0.000000
2 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}P_{0}^{{\rm o}}~(97.0\%)$ 2.739060 2.808068 2.806866   $\rm {}^{3}\hspace*{-.5mm}P_{0}^{{\rm o}}~(97.1\%)$ 3.059906 3.109055 3.110232
3 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}P_{1}^{{\rm o}}~(96.9\%)$ 2.748293 2.819413 2.818090   $\rm {}^{3}\hspace*{-.5mm}P_{1}^{{\rm o}}~(96.9\%)$ 3.072680 3.123582 3.124881
4 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}P_{2}^{{\rm o}}~(96.7\%)$ 2.767020 2.842952 2.841350   $\rm {}^{3}\hspace*{-.5mm}P_{2}^{{\rm o}}~(96.6\%)$ 3.098672 3.154233 3.155270
5 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}F_{4}^{{\rm o}}~(97.3\%)$ 2.896923 2.941329 2.944497   $\rm {}^{3}\hspace*{-.5mm}F_{4}^{{\rm o}}~(97.4\%)$ 3.234927 3.258178 3.264649
6 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}F_{3}^{{\rm o}}~(96.2\%)$ 2.906694 2.961235 2.963277   $\rm {}^{3}\hspace*{-.5mm}F_{3}^{{\rm o}}~(95.7\%)$ 3.247762 3.282128 3.287197
7 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}F_{2}^{{\rm o}}~(96.6\%)$ 2.917192 2.981802 2.982698   $\rm {}^{3}\hspace*{-.5mm}F_{2}^{{\rm o}}~(96.2\%)$ 3.262960 3.308454 3.312214
8 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{1}\hspace*{-.5mm}D_{2}^{{\rm o}}~(71.5\%)$ 3.110770 3.145142 3.152963   $\rm {}^{1}\hspace*{-.5mm}D_{2}^{{\rm o}}~(67.4\%)$ 3.470531 3.487258 3.497713
9 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}D_{3}^{{\rm o}}~(78.2\%)$ 3.119456 3.148578 3.156780   $\rm {}^{3}\hspace*{-.5mm}D_{3}^{{\rm o}}~(72.3\%)$ 3.478260 3.487760 3.499169
10 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}D_{1}^{{\rm o}}~(96.8\%)$ 3.126389 3.170297 3.176499   $\rm {}^{3}\hspace*{-.5mm}D_{1}^{{\rm o}}~(96.8\%)$ 3.489568 3.515926 3.525054
11 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}D_{2}^{{\rm o}}~(71.6\%)$ 3.132258 3.174174 3.180891   $\rm {}^{3}\hspace*{-.5mm}D_{2}^{{\rm o}}~(71.8\%)$ 3.499112 3.523110 3.532855
12 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{1}\hspace*{-.5mm}F_{3}^{{\rm o}}~(77.6\%)$ 3.145710 3.195308 3.203371   $\rm {}^{1}\hspace*{-.5mm}F_{3}^{{\rm o}}~(71.3\%)$ 3.512852 3.546890 3.557753
13 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{1}\hspace*{-.5mm}P_{1}^{{\rm o}}~(95.4\%)$$^{\bigstar}$ 4.059132 4.059108 4.114305   $\rm {}^{1}\hspace*{-.5mm}P_{1}^{{\rm o}}~(95.6\%)$$^{\bigstar}$ 4.492846 4.492869 4.553079
14 $\rm 3s^{ }3p^{6}3d$ $\rm {}^{3}\hspace*{-.5mm}D_{1}~(69.1\%)$ 5.013754 5.007759 5.122273   $\rm {}^{3}\hspace*{-.5mm}D_{1}~(71.9\%)$ 5.547059 5.546697 5.667028
15 $\rm 3s^{ }3p^{6}3d$ $\rm {}^{3}\hspace*{-.5mm}D_{2}~(69.1\%)$ 5.017989 5.010726 5.124985   $\rm {}^{3}\hspace*{-.5mm}D_{2}~(71.8\%)$ 5.552838 5.550917 5.670942
16 $\rm 3s^{ }3p^{6}3d$ $\rm {}^{3}\hspace*{-.5mm}D_{3}~(69.2\%)$ 5.024692 5.015474 5.129131   $\rm {}^{3}\hspace*{-.5mm}D_{3}~(72.0\%)$ 5.562141 5.557707 5.676969
17 $\rm 3s^{ }3p^{6}3d$ $\rm {}^{1}\hspace*{-.5mm}D_{2}~(63.6\%)$ 5.191350 5.161717 5.318685   $\rm {}^{1}\hspace*{-.5mm}D_{2}~(66.4\%)$ 5.742414 5.721178 5.883764

Notes. (a) present work: 2894-level MCBP results; (b) critically compiled experimental data of Shirai et al. (2000); (c) MCHF results of Froese-Fischer & Tachiev (2006); $^{(\bigstar)}$ dominant excitation threshold - see Table 2.


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