\begin{table}%t6 %\centering \par \caption{\label{tab_energy_ca}The level energies (Ryd) of Ca$^{10+}$ from different calculations along with experimental data compiled in CHIANTI v6. } \begin{tabular}{ccccccc} \hline\hline\noalign{\smallskip} ID & level~specification & Exp.\tablefootmark{a}& AS & FAC & CHIANTI\tablefootmark{b} & MCHF\tablefootmark{c} \\ \hline\noalign{\smallskip} 1 & ${\rm 2s^2 2p6 ~ ^1S_0}$ & & 0.0000 & 0.0000 & 0.0000 & 0.0000 \\ 2 & ${\rm 2s^2 2p^5 3s ~ ^3P_2}$ & & 25.5427 & 25.5586 & 25.4991 & 25.5486 \\ 3 & ${\rm 2s^2 2p^5 3s ~ ^3P_1}$ & 25.6149 & 25.6249 & 25.6435 & 25.5729 & 25.6289 \\ 4 & ${\rm 2s^2 2p^5 3s ~ ^3P_0}$ & 25.8053 & 25.8126 & 25.8279 & 25.7707 & 25.8205 \\ 5 & ${\rm 2s^2 2p^5 3s ~ ^1P_1}$ & 25.8791 & 25.8880 & 25.9076 & 25.8335 & 25.8924 \\ 6 & ${\rm 2s^2 2p^5 3p ~ ^3S_1}$ & & 26.9270 & 26.9345 & 26.9288 & 26.9431 \\ 7 & ${\rm 2s^2 2p^5 3p ~ ^3D_2}$ & 27.1020 & 27.1604 & 27.1738 & 27.1112 & 27.1699 \\ 8 & ${\rm 2s^2 2p^5 3p ~ ^3D_3}$ & 27.1075 & 27.1613 & 27.1733 & 27.1152 & 27.1738 \\ 9 & ${\rm 2s^2 2p^5 3p ~ ^1P_1}$ & 27.1813 & 27.2386 & 27.2530 & 27.1819 & 27.2461 \\ 10 & ${\rm 2s^2 2p^5 3p ~ ^3P_2}$ & 27.2451 & 27.2975 & 27.3143 & 27.2340 & 27.3093 \\ 11 & ${\rm 2s^2 2p^5 3p ~ ^3D_1}$ & 27.2059 & 27.4268 & 27.4360 & 27.3743 & 27.4337 \\ 12 & ${\rm 2s^2 2p^5 3p ~ ^3P_0}$ & & 27.4440 & 27.4562 & 27.3768 & 27.4516 \\ 13 & ${\rm 2s^2 2p^5 3p ~ ^1D_2}$ & 27.4893 & 27.5070 & 27.5222 & 27.4526 & 27.5210 \\ 14 & ${\rm 2s^2 2p^5 3p ~ ^3P_1}$ & 27.4884 & 27.5124 & 27.5273 & 27.4526 & 27.5239 \\ 15 & ${\rm 2s^2 2p^5 3p ~ ^1S_0}$ & & 28.3886 & 28.4770 & 28.2369 & 28.2858 \\ 16 & ${\rm 2s^2 2p^5 3d ~ ^3P_0}$ & & 29.1508 & 29.1489 & 29.1114 & 29.1602 \\ 17 & ${\rm 2s^2 2p^5 3d ~ ^3P_1}$ & 29.1543 & 29.1812 & 29.1767 & 29.1387 & 29.1880 \\ 18 & ${\rm 2s^2 2p^5 3d ~ ^3P_2}$ & & 29.2418 & 29.2343 & 29.1934 & 29.2443 \\ 19 & ${\rm 2s^2 2p^5 3d ~ ^3F_4}$ & 29.2344 & 29.2760 & 29.2659 & 29.2152 & 29.2758 \\ 20 & ${\rm 2s^2 2p^5 3d ~ ^3F_3}$ & 29.2708 & 29.3104 & 29.3071 & 29.2499 & 29.3118 \\ 21 & ${\rm 2s^2 2p^5 3d ~ ^3F_2}$ & 29.4029 & 29.3772 & 29.3747 & 29.3082 & 29.3764 \\ 22 & ${\rm 2s^2 2p^5 3d ~ ^3D_3}$ & 29.3765 & 29.4265 & 29.4200 & 29.3474 & 29.4200 \\ 23 & ${\rm 2s^2 2p^5 3d ~ ^3D_1}$ & 29.5224 & 29.5622 & 29.5594 & 29.4777 & 29.5577 \\ 24 & ${\rm 2s^2 2p^5 3d ~ ^1D_2}$ & 29.6271 & 29.6026 & 29.5980 & 29.5342 & 29.6361 \\ 25 & ${\rm 2s^2 2p^5 3d ~ ^3D_2}$ & 29.5506 & 29.6395 & 29.6338 & 29.5624 & 29.6030 \\ 26 & ${\rm 2s^2 2p^5 3d ~ ^1F_3}$ & 29.6253 & 29.6428 & 29.6366 & 29.5707 & 29.6402 \\ 27 & ${\rm 2s^2 2p^5 3d ~ ^1P_1}$ & 29.9288 & 30.0051 & 30.0059 & 29.9060 & 29.9684 \\ 28 & ${\rm 2s 2p^6 3s ~ ^3S_1}$ & & 32.2654 & 32.2832 & 32.2261 & \\ 29 & ${\rm 2s 2p^6 3s ~ ^1S_0}$ & & 32.5841 & 32.6044 & 32.5190 & \\ 30 & ${\rm 2s 2p^6 3p ~ ^3P_0}$ & & 33.8113 & 33.8432 & 33.7971 & 33.6845 \\ 31 & ${\rm 2s 2p^6 3p ~ ^3P_1}$ & 33.6523 & 33.8206 & 33.8495 & 33.8090 & 33.6960 \\ 32 & ${\rm 2s 2p^6 3p ~ ^3P_2}$ & & 33.8508 & 33.8733 & 33.8464 & 33.7327 \\ 33 & ${\rm 2s 2p^6 3p ~ ^1P_1}$ & 33.7981 & 33.9839 & 34.0176 & 33.9338 & 33.8469 \\ 34 & ${\rm 2s^2 2p^5 4s ~ ^3P_2}$ & & 34.2467 & 34.2404 & 34.1543 & \\ 35 & ${\rm 2s^2 2p^5 4s ~ ^1P_1}$ & 34.4633 & 34.2563 & 34.2488 & 34.1817 & \\ 36 & ${\rm 2s^2 2p^5 4s ~ ^3P_0}$ & & 34.5012 & 34.4901 & 34.4277 & \\ 37 & ${\rm 2s^2 2p^5 4s ~ ^3P_1}$ & 34.2082 & 34.5124 & 34.5026 & 34.4432 & \\ 38 & ${\rm 2s^2 2p^5 4p ~ ^3S_1}$ & & 34.7857 & 34.7746 & 34.7320 & \\ 39 & ${\rm 2s^2 2p^5 4p ~ ^3D_3}$ & & 34.8251 & 34.8174 & 34.7818 & \\ 40 & ${\rm 2s^2 2p^5 4p ~ ^3D_2}$ & & 34.8270 & 34.8207 & 34.7802 & \\ 41 & ${\rm 2s^2 2p^5 4p ~ ^1P_1}$ & & 34.8601 & 34.8562 & 34.8074 & \\ 42 & ${\rm 2s^2 2p^5 4p ~ ^3P_2}$ & & 34.8770 & 34.8745 & 34.8230 & \\ 43 & ${\rm 2s^2 2p^5 4p ~ ^3P_0}$ & & 35.0069 & 35.0089 & 34.9386 & \\ 44 & ${\rm 2s^2 2p^5 4p ~ ^3D_1}$ & 35.0628 & 35.0862 & 35.0788 & 35.0446 & \\ 45 & ${\rm 2s^2 2p^5 4p ~ ^1D_2}$ & & 35.1190 & 35.1149 & 35.0754 & \\ 46 & ${\rm 2s^2 2p^5 4p ~ ^3P_1}$ & & 35.1201 & 35.1165 & 35.0691 & \\ 47 & ${\rm 2s^2 2p^5 4p ~ ^1S_0}$ & & 35.3734 & 35.4243 & 35.2506 & \\ 48 & ${\rm 2s^2 2p^5 4d ~ ^3P_0}$ & & 35.5595 & 35.5355 & 35.5085 & \\ 49 & ${\rm 2s^2 2p^5 4d ~ ^3P_1}$ & & 35.5757 & 35.5516 & 35.5230 & \\ 50 & ${\rm 2s^2 2p^5 4d ~ ^3F_4}$ & 35.5245 & 35.5992 & 35.5751 & 35.5431 & \\ 51 & ${\rm 2s^2 2p^5 4d ~ ^3P_2}$ & & 35.6032 & 35.5793 & 35.5477 & \\ 52 & ${\rm 2s^2 2p^5 4d ~ ^3F_3}$ & 35.5799 & 35.6149 & 35.5945 & 35.5586 & \\ 53 & ${\rm 2s^2 2p^5 4d ~ ^1D_2}$ & 35.6233 & 35.6407 & 35.6217 & 35.5814 & \\ 54 & ${\rm 2s^2 2p^5 4d ~ ^3D_3}$ & 35.5377 & 35.6551 & 35.6352 & 35.5932 & \\ 55 & ${\rm 2s^2 2p^5 4f ~ ^3D_1}$ & & 35.7173 & 35.7076 & 35.8297 & \\ 56 & ${\rm 2s^2 2p^5 4f ~ ^3D_2}$ & & 36.1749 & 35.7228 & 35.8340 & \\ 57 & ${\rm 2s^2 2p^5 4d ~ ^3D_1}$ & 35.7126 & 35.7469 & 35.7315 & 35.6752 & \\ 58 & ${\rm 2^s 2p^6 3d ~ ^3D_3}$ & & 35.7674 & 35.7553 & 35.9009 & \\ 59 & ${\rm 2s^2 2p^5 4f ~ ^1D_2}$ & & 35.7339 & 35.8565 & 35.8347 & \\ 60 & ${\rm 2s^2 2p^5 4d ~ ^3F_2}$ & 35.8730 & 35.8811 & 35.8612 & 35.8283 & \\ \hline \end{tabular} \tablefoot{{\tablefoottext{a} Experimental data are from the CHIANTI~v6 database -- see references therein.} \tablefoottext{b}{Theoretical energies from %Zhang et~al. ( \citet{ZSC87}.} \tablefoottext{c}{MCHF data is available from the website: \protect\url{http://atoms.vuse.vanderbilt.edu/}}} \end{table}