\begin{table}%t5 \caption{\label{Tab:Mn:Fe:tar-str}The lowest $\Delta n_{{\rm c}} = 0$ core excitation thresholds (in Rydbergs) for \ion{Mn}{viii} and \ion{Fe}{ix}.} \par %\centering \par \begin{tabular}{r l l l r r c l l r r r r r} % 14 columns \hline \hline \multicolumn{14}{c}{\vspace*{-2mm}} \\ & & \multicolumn{4}{c}{${\rm Mn}^{7+}$} & & \multicolumn{7}{c}{${\rm Fe}^{8+}$} \\ \multicolumn{14}{c}{\vspace*{-2mm}} \\ %\cline{3-6}\cline{8-14} %\multicolumn{11}{c}{\vspace*{-2mm}} \\ K & Config. & Level(mix) & Present\tablefootmark{a} & NIST\tablefootmark{b} & MCHF\tablefootmark{c} & & Level(mix) & Present\tablefootmark{a} & NIST\tablefootmark{b} & MCHF\tablefootmark{c} & CIV3\tablefootmark{e} & IRON\tablefootmark{f} & FAC3\tablefootmark{g} \\ \hline \multicolumn{14}{c}{\vspace*{-2mm}} \\ %K Configuration Level Present NIST MCHF CIV3 IRON FAC3 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\%) $ & $0.00000$ & $0.00000$ & $0.00000$ & $0.00000$ & $0.00000$ & $0.0000$ \\ \multicolumn{14}{c}{\vspace*{-2mm}} \\ 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 & $\rm 3s^{2}3p^{5}3d$ & $\rm {}^{3}\hspace*{-.5mm}P_{2}^{{\rm o}}~(96.4\%)$ & $3.41384$ & $3.46275$ & $3.25264$ & & $\rm {}^{3}\hspace*{-.5mm}P_{2}^{{\rm o}}~(96.2\%)$ & $3.74058$ & $3.76963$ & $3.52725$ & $3.76962$ & $3.84039$ & $3.8200$ \\ \multicolumn{14}{c}{\vspace*{-2mm}} \\ 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 & $\rm 3s^{2}3p^{5}3d$ & $\rm {}^{3}\hspace*{-.5mm}F_{2}^{{\rm o}}~(95.5\%)$ & $3.59269$ & $3.63198$ & $3.42463$ & & $\rm {}^{3}\hspace*{-.5mm}F_{2}^{{\rm o}}~(94.6\%)$ & $3.93169$ & $3.95325$ & $3.71373$ & $3.95329$ & $4.04308$ & $4.0215$ \\ \multicolumn{14}{c}{\vspace*{-2mm}} \\ 8 & $\rm 3s^{2}3p^{5}3d$ & $\rm {}^{3}\hspace*{-.5mm}D_{3}^{{\rm o}}~(68.7\%)$ & $3.81841$ & $3.82162$ & $3.62227$ & & $\rm {}^{3}\hspace*{-.5mm}D_{3}^{{\rm o}}~(64.5\%)$ & $4.16736$ & $4.15184$ & $3.92030$ & $4.15171$ & $4.25326$ & $4.2373$ \\ \multicolumn{14}{c}{\vspace*{-2mm}} \\ 9 & $\rm 3s^{2}3p^{5}3d$ & $\rm {}^{1}\hspace*{-.5mm}D_{2}^{{\rm o}}~(64.4\%)$ & $3.81303$ & $3.82565$ & $3.62467$ & & $\rm {}^{1}\hspace*{-.5mm}D_{2}^{{\rm o}}~(62.1\%)$ & $4.16451$ & $4.16224$ & $3.92846$ & $4.16220$ & $4.26847$ & $4.2540$ \\ \multicolumn{14}{c}{\vspace*{-2mm}} \\ 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 & $\rm 3s^{2}3p^{5}3d$ & $\rm {}^{3}\hspace*{-.5mm}D_{2}^{{\rm o}}~(64.7\%)$ & $3.85013$ & $3.86961$ & $3.66842$ & & $\rm {}^{3}\hspace*{-.5mm}D_{2}^{{\rm o}}~(62.6\%)$ & $4.21227$ & $4.21567$ & $3.98226$ & $4.21573$ & $4.31956$ & $4.3039$ \\ \multicolumn{14}{c}{\vspace*{-2mm}} \\ 12 & $\rm 3s^{2}3p^{5}3d$ & $\rm {}^{1}\hspace*{-.5mm}F_{3}^{{\rm o}}~(67.1\%)$ & $3.86567$ & $3.89595$ & $3.69578$ & & $\rm {}^{1}\hspace*{-.5mm}F_{3}^{{\rm o}}~(62.2\%)$ & $4.22812$ & $4.24494$ & $4.01241$ & $4.24509$ & $4.34420$ & $4.3281$ \\ \multicolumn{14}{c}{\vspace*{-2mm}} \\ 13 & $\rm 3s^{2}3p^{5}3d$ & $\rm {}^{1}\hspace*{-.5mm}P_{1}^{{\rm o}}~(95.7\%)$\tablefootmark{\bigstar} & $4.91368$ & $4.91368$ & $4.76446$ & & $\rm {}^{1}\hspace*{-.5mm}P_{1}^{{\rm o}}~(95.9\%)$\tablefootmark{\bigstar} & $5.32660$ & $5.32678$ & $5.14621$ & $5.32645$ & $5.47936$ & $5.4598$ \\ & & & & & & & & & & $5.212^{{\rm d}}$ & & & \\ \multicolumn{14}{c}{\vspace*{-2mm}} \\ 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 & $\rm 3s^{ }3p^{6}3d$ & $\rm {}^{3}\hspace*{-.5mm}D_{3}~(73.7\%)$ & $6.07394$ & $6.09935$ & $6.01167$ & & $\rm {}^{3}\hspace*{-.5mm}D_{3}~(74.9\%)$ & $6.63882$ & $6.64254$ & $6.52770$ & $6.64254$ & $6.78194$ & $6.7377$ \\ \multicolumn{14}{c}{\vspace*{-2mm}} \\ 17 & $\rm 3s^{ }3p^{6}3d$ & $\rm {}^{1}\hspace*{-.5mm}D_{2}~(68.2\%)$ & $6.26561$ & $6.27726$ & $6.23324$ & & $\rm {}^{1}\hspace*{-.5mm}D_{2}~(69.4\%)$ & $6.84122$ & $6.83333$ & $6.76228$ & $6.83334$ & $6.98165$ & $6.9447$ \\ \hline \end{tabular} \tablefoot{ \tablefoottext{a}{present work: 2894-level MCBP results;} \tablefoottext{b}{ critically compiled experimental data of \cite{Shirai:2000};} \tablefoottext{c}{MCHF results\ of \cite{Irimia:2003};} \tablefoottext{\bigstar}{dominant excitation threshold - see Table~\ref{Tab:tar-rad};} \tablefoottext{d}{single configuration TDCHF results\ of \cite{Ghosh:1997};} \tablefoottext{e}{CIV3 results\ of \cite{Verma:2006};} \tablefoottext{f}{IRON Project results\ of \cite{Storey:2002};} \tablefoottext{g}{6284-level FAC results\ of \cite{Aggarwal:2006};} } \end{table}