\begin{table}%T3
\caption{\rm {Comparisons of fine-structure energy levels (in
cm$^{-1} $) for Ti XI. CSS; measurement of Churilov et~al. (\cite{Churilov89});
NIST: ({\tt http://www.nist.gov}); CFF: calculation by Fischer (2002)
and BF: calculation by Fawcett (\cite{Fawcett83}). (a) and (b) in the present calculation represents fine-tuned and {{ab~initio}} energies respectively.}\label{tab3}}
%\centering
\par
\begin{tabular}{c c c c c c c c c c}
\hline\hline
Index&Conf.& Level & NIST & CSS & Present(a)&Present(b) & CFF& BF &Leading$\%$ \\
\hline
\noalign{\smallskip}
1 & $\rm 3s^2$& $\rm ^1S_0$ & 0.0 & 0.0 & 0.0 &0.0& & \\
2 & 3s3p &$\rm ^3P_0$ & 173200 & 173216 & 173306.4 &171859.6&172733.1 &173087& 100 \\
3 &  &$\rm ^3P_1$ & 175753 &175747 & 175849.4 &174235.1&175298.4& 175710&99 \\
4 &  &$\rm ^3P_2$ & 181400 &181371 & 181500.6 &179456.4&180924.8& 181525&100 \\
5 &  &$\rm ^1P_1$ & 258973 &258972 & 258877.8 &262236.9&258412.5 & 258973&97 \\
6 & $\rm 3p^2$&$\rm ^1D_2$ & 408820 &408880 & 406925.6&407887.1&408537.6 & 409487&
73, 22(14), 4(9) \\
7 & &$\rm ^3P_0$ &410640& 410610 & 410712.4&411237.9&410334.0 & 410450&99\\
8 & &$\rm ^3P_1$ &415150 &414132 & 415245.8&414412.7&414010.1&414094 &100 \\
9 & &$\rm ^3P_2$ & 420700 &420667 & 420675.0&420309.4&420578.9 & 420901&94, 6(6) \\
10 & &$^1S_0$ &482840 &482832 & 482957.8 &486861.3&482835.1&482687& 94, 4(6) \\
11 & 3s3d&$\rm ^3D_1$ &499840&499808 & 499965.7&502305.4&500895.0 &500264& 100 \\
12 & &$\rm ^3D_2$ & 500160 &500163 & 500285.7 &502682.6&501101.0 &500745& 100 \\
13 & &$\rm ^3D_3$ & 500650 &500633 & 500775.8 &503272.7&501670.3& 501474&100 \\
14 & &$\rm ^1D_2$ &564604&564513 & 566852.5 &573423.4&565426.2& 565226&76, 21(6)\\
15 & 3p3d&$\rm ^3F_2$ & 683920 &683850 &684021.2&684746.6&684576.2 &683968&
93, 6(18) \\
16 & &$\rm ^3F_3$ &687580 & 687587 & 687689.1 &688243.5&688557.1& 687997& 100 \\
17 & &$\rm ^3F_4$ &691980 &691958 &692102.0 &692334.1&693155.3& 692615&100 \\
18 & &$\rm ^1D_2$ & 694610 &694742 & 694734.2 &695731.5&695077.0& 694567& 93, 6(15) \\
19 & &$\rm ^3P_2$ & &724697 & 724947.2 &728183.6&725496.8& 723438& 73, 26(24) \\
20 & &$\rm ^3D_1$ & &725636 &725949.1&729096.1&726470.8&728969& 62, 38(22) \\
21 & &$\rm ^3P_0$ & &729721 & 729864.4&732538.5&730786.7 & 728288& 100 \\
22 & &$\rm ^3P_1$ & & 730362 & 730298.5&733328.8&731329.1 & 724085& 62, 38(20) \\
23 & &$\rm ^3D_3$ &730564 &730567 & 730684.8 &734011.7&731421.3&729485& 100 \\
24 & &$\rm ^3D_2$ & &730835 & 730882.0 &733994.6&731724.6& 729586& 74, 26(19)\\
25 & &$\rm ^1F_3$ & &781821 & 782018.4 &791611.8&783298.1&785934& 99 \\
26 & &$\rm ^1P_1$ &750220 &791982 & 792428.8 &802604.3&793450.7 & 792598&96 \\
27 &$\rm 3d^2$&$\rm ^3F_2$& &1008527&1008656.0&1012362.7&1010796 & &100\\
28 & &$\rm ^3F_3$& &1008991&1009113.1&1012962.2&1011513 & &100\\
29 & &$\rm ^3F_4$& &1009602&1009726.8&1013719.0&1012096 & &100\\
30 & &$\rm ^1D_2$& &1031369&1031635.7&1038041.0&1033485 & &95\\
31 &$\rm 3d^2$ &$\rm ^1G_4$& &1032316&1032525.1&1040011.3&1035235 & &99\\
32 & &$\rm ^3P_0$& &1034687&1034835.9&1039749.4&1037061 & &99\\
33 & &$\rm ^3P_1$& &1034869&1035025.8&1039972.9&1037424 & &99\\
34 & &$\rm ^3P_2$& &1035200&1035300.8&1040470.4&1037568 & &97\\
35 & &$\rm ^1S_0$& &1098008&1098906.9&1107333.6&1099036 & &89, 7(36)\\
\hline
\end{tabular}
\end{table}