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Table 5:

The lowest $\Delta n_{{\rm c}} = 0$ core excitation thresholds (in Rydbergs) for Mn VIII and Fe IX.
    ${\rm Mn}^{7+}$   ${\rm Fe}^{8+}$
K Config. Level(mix) Presenta NISTb MCHFc   Level(mix) Presenta NISTb MCHFc CIV3e IRONf FAC3g
1 $\rm 3s^{2}3p^{6} $ $\rm {}^{1}\hspace*{-.5mm}S_{0}~(96.7\%) $ 0.00000 0.00000 0.00000   $\rm {}^{1}\hspace*{-.5mm}S_{0}~(96.9\%) $ 0.00000 0.00000 0.00000 0.00000 0.00000 0.0000
2 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}P_{0}^{{\rm o}}~(97.2\%)$ 3.36224 3.40502 3.19510   $\rm {}^{3}\hspace*{-.5mm}P_{0}^{{\rm o}}~(97.4\%)$ 3.67368 3.69767 3.45516 3.69766 3.76364 3.7475
3 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}P_{1}^{{\rm o}}~(96.9\%)$ 3.37921 3.42372 3.21381   $\rm {}^{3}\hspace*{-.5mm}P_{1}^{{\rm o}}~(96.9\%)$ 3.69563 3.72084 3.47859 3.72078 3.78883 3.7710
4 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}P_{2}^{{\rm o}}~(96.4\%)$ 3.41384 3.46275 3.25264   $\rm {}^{3}\hspace*{-.5mm}P_{2}^{{\rm o}}~(96.2\%)$ 3.74058 3.76963 3.52725 3.76962 3.84039 3.8200
5 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}F_{4}^{{\rm o}}~(97.5\%)$ 3.55446 3.57067 3.36662   $\rm {}^{3}\hspace*{-.5mm}F_{4}^{{\rm o}}~(97.6\%)$ 3.88447 3.88026 3.64440 3.88027 3.97113 3.9468
6 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}F_{3}^{{\rm o}}~(94.9\%)$ 3.57113 3.59878 3.39298   $\rm {}^{3}\hspace*{-.5mm}F_{3}^{{\rm o}}~(93.9\%)$ 3.90343 3.91217 3.67440 3.91217 4.00201 3.9797
7 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}F_{2}^{{\rm o}}~(95.5\%)$ 3.59269 3.63198 3.42463   $\rm {}^{3}\hspace*{-.5mm}F_{2}^{{\rm o}}~(94.6\%)$ 3.93169 3.95325 3.71373 3.95329 4.04308 4.0215
8 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}D_{3}^{{\rm o}}~(68.7\%)$ 3.81841 3.82162 3.62227   $\rm {}^{3}\hspace*{-.5mm}D_{3}^{{\rm o}}~(64.5\%)$ 4.16736 4.15184 3.92030 4.15171 4.25326 4.2373
9 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{1}\hspace*{-.5mm}D_{2}^{{\rm o}}~(64.4\%)$ 3.81303 3.82565 3.62467   $\rm {}^{1}\hspace*{-.5mm}D_{2}^{{\rm o}}~(62.1\%)$ 4.16451 4.16224 3.92846 4.16220 4.26847 4.2540
10 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}D_{1}^{{\rm o}}~(96.8\%)$ 3.83602 3.85773 3.65585   $\rm {}^{3}\hspace*{-.5mm}D_{1}^{{\rm o}}~(96.8\%)$ 4.19143 4.19744 3.96326 4.19745 4.29702 4.2836
11 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{3}\hspace*{-.5mm}D_{2}^{{\rm o}}~(64.7\%)$ 3.85013 3.86961 3.66842   $\rm {}^{3}\hspace*{-.5mm}D_{2}^{{\rm o}}~(62.6\%)$ 4.21227 4.21567 3.98226 4.21573 4.31956 4.3039
12 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{1}\hspace*{-.5mm}F_{3}^{{\rm o}}~(67.1\%)$ 3.86567 3.89595 3.69578   $\rm {}^{1}\hspace*{-.5mm}F_{3}^{{\rm o}}~(62.2\%)$ 4.22812 4.24494 4.01241 4.24509 4.34420 4.3281
13 $\rm 3s^{2}3p^{5}3d$ $\rm {}^{1}\hspace*{-.5mm}P_{1}^{{\rm o}}~(95.7\%)$$^{\bigstar}$ 4.91368 4.91368 4.76446   $\rm {}^{1}\hspace*{-.5mm}P_{1}^{{\rm o}}~(95.9\%)$$^{\bigstar}$ 5.32660 5.32678 5.14621 5.32645 5.47936 5.4598
                    $5.212^{{\rm d}}$      
14 $\rm 3s^{ }3p^{6}3d$ $\rm {}^{3}\hspace*{-.5mm}D_{1}~(73.5\%)$ 6.05426 6.08432 5.99785   $\rm {}^{3}\hspace*{-.5mm}D_{1}~(74.7\%)$ 6.61242 6.62249 6.50906 6.62249 6.75891 6.7176
15 $\rm 3s^{ }3p^{6}3d$ $\rm {}^{3}\hspace*{-.5mm}D_{2}~(73.4\%)$ 6.06173 6.09007 6.00326   $\rm {}^{3}\hspace*{-.5mm}D_{2}~(74.6\%)$ 6.62228 6.63001 6.51629 6.63001 6.76762 6.7251
16 $\rm 3s^{ }3p^{6}3d$ $\rm {}^{3}\hspace*{-.5mm}D_{3}~(73.7\%)$ 6.07394 6.09935 6.01167   $\rm {}^{3}\hspace*{-.5mm}D_{3}~(74.9\%)$ 6.63882 6.64254 6.52770 6.64254 6.78194 6.7377
17 $\rm 3s^{ }3p^{6}3d$ $\rm {}^{1}\hspace*{-.5mm}D_{2}~(68.2\%)$ 6.26561 6.27726 6.23324   $\rm {}^{1}\hspace*{-.5mm}D_{2}~(69.4\%)$ 6.84122 6.83333 6.76228 6.83334 6.98165 6.9447

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; (d) single configuration TDCHF results of Ghosh & Mukherjee (1997); (e) CIV3 results of Verma et al. (2006); (f) IRON Project results of Storey et al. (2002); (g) 6284-level FAC results of Aggarwal et al. (2006);


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