\begin{table}%T2
\caption{\rm {Comparisons of fine-structure energy levels (in
cm$^{-1} $) for K VIII. CSS: measurement of Churilov et~al. (\cite{Churilov89});
NIST: ({\tt http://www.nist.gov}); CFF: calculation by Fischer (2002)
and BF: calculation by Fawcett (\cite{Fawcett83}). (a) and (b) in the present calculation represents fine-tuned and {{ab~initio}} energies respectively.}\label{tab2}}
%\centering
\par
\begin{tabular}{c c c c c c c c c c}
\hline\hline
Index&Conf.& Level & NIST & CSS & Present(a)&Present(b) & CFF&BF &Leading$\%$ \\
\hline\\[-3.5mm]
1 & $\rm 3s^2$& $\rm ^1S_0$ & 0.0 & 0.0 & 0.0 &0.0& & \\
2 & 3s3p &$\rm ^3P_0$ & 128187 &128097 & 128299.4 &126868.1&127726.2&127948& 100 \\
3 &  &$\rm ^3P_1$ & 129299 &129209 & 129407.4 &127888.8&128856.2& 129121& 100 \\
4 &  &$\rm ^3P_2$ & 131672 &131582 & 131781.5 &130046.4&131229.9& 131607& 100 \\
5 &  &$\rm ^1P_1$ & 192537 &192537 & 192406.0 &195479.7&192274.5 & 192537&96 \\
6 & $3\rm p^2$&$\rm ^1D_2$ & 300387 &300317 & 298309.8&299295.0&300376.2 &300839&
74, 24(14) \\
7 & &$\rm ^3P_0$ &304890& 304820 & 304991.1 &305242.9&304648.4 &304642& 99\\
8 & &$\rm ^3P_1$ &306249 &306179 & 306358.7&306451.2&306059.5 & 306064&99 \\
9 & &$\rm ^3P_2$ & 308826 &308756 & 308905.6&308739.2&308656.5 & 308780&98 \\
10 & &$\rm ^1S_0$ &357660 &357590 & 357711.7 &361404.2&357870.3& 357581&93, 3(1) \\
11 & 3s3d&$\rm ^3D_1$ &368197&368127 & 368330.2&370132.8&369008.5 &368385& 100 \\
12 & &$\rm ^3D_2$ &368276&368206 & 368409.2&370246.4&369050.1 &368546& 100 \\
13 & &$\rm ^3D_3$ &368407&368337 & 368540.4 &370426.2&369208.3&368790& 100 \\
14 & &$\rm ^1D_2$ &419100&419030 & 421488.0 &427516.5&420073.3 & 419545&74, 24(6)\\
15 & 3p3d&$\rm ^3F_2$ &503877 &503770 &504000.4&504139.3&504412.9&503678&97 \\
16 & &$\rm ^3F_3$ &505277 &505184 & 505404.0 &505462.9&505939.8& 505268&100 \\
17 & &$\rm ^3F_4$ &507077 &506945 &507207.5 &507086.5&507788.3& 507171&100 \\
18 & &$\rm ^1D_2$ &510990 &510993 & 511122.8 &511537.4&511447.5&510589& 97 \\
19 & &$\rm ^3P_2$ &535417 &535330 & 535515.8 &538121.1&535985.9& 534935& 86, 13(23) \\
20 & &$\rm ^3P_1$ & &536211 &536347.1&538937.6&536938.3&535781& 82,17(22) \\
21 & &$\rm ^3P_0$ & &537294 & 537447.5&539782.1&538081.1 & 536830& 99 \\
22 & &$\rm ^3D_1$ & &538541 & 538688.4&541337.9&539239.4 & 538229&83, 17(20) \\
23 & &$\rm ^3D_2$ &538637 &539020 & 538835.7 &541848.6&539706.7& 538810& 86, 13(19) \\
24 & &$\rm ^3D_3$ &539257 &539175 & 539390.3 &542116.7&539850.4& 539102& 100 \\
25 & &$\rm ^1F_3$ & &576421 & 576746.9 &586240.2&577665.2& 584295& 98 \\
26 & &$\rm ^1P_1$ &553620 &585520 & 586085.0&595776.1&586834.8& 589192&95, 4(5) \\
27 &$\rm 3d^2$&$\rm ^3F_2$& &742660&742805.1&745600.1&744597.8 & &100\\
28 & &$\rm ^3F_3$& &742797&742942.4&745783.3&744812.7 & &100\\
29 & &$\rm ^3F_4$& &742952&743097.5&746017.3&744957.3 & &100\\
30 & &$\rm ^1G_4$& &756866&757192.6&763964.1&759202.4 & &97\\
31 &$\rm 3d^2$ &$\rm ^1D_2$& &757420&758019.9&761765.4&759299.4 & &83, 14(44)\\
32 & &$\rm ^3P_0$& &762399&762561.3&766306.8&764444.7 & &99\\
33 & &$\rm ^3P_1$& &762470&762633.7&766375.2&764562.6 & &99\\
34 & &$\rm ^3P_2$& &762534&762701.1&766483.9&764565.9 & &99\\
35 & &$\rm ^1S_0$& &803924&804779.4&813990.0&806682.8 & &92, 4(63)\\
\hline
\end{tabular}
\end{table}