\begin{table}%t1
\caption{\label{tab1}\ion{Fe}{ii} energy levels for the  3d$^{6}$~($^{3}$P)4f subconfiguration. } 
\small%\centering
\par
\begin{tabular}{crcrcrcrcrcrrrr}
\hline\hline\noalign{\smallskip}
\multicolumn{1}{c}{Design-}&
\multicolumn{1}{c}{$J$}&
\multicolumn{1}{c}{Energy}&
\multicolumn{1}{c}{c$-$o}&
\multicolumn{1}{c}{Design-}&
\multicolumn{1}{c}{$J$}&
\multicolumn{1}{c}{Energy}&
\multicolumn{1}{c}{c$-$o}&
\multicolumn{1}{c}{Design-}&
\multicolumn{1}{c}{$J$}&
\multicolumn{1}{c}{Energy}&
\multicolumn{1}{c}{c$-$o}
\\
\multicolumn{1}{c}{ation}&
\multicolumn{1}{c}{}&
\multicolumn{1}{c}{cm$^{-1}$}&
\multicolumn{1}{c}{cm$^{-1}$}&
\multicolumn{1}{c}{ation}&
\multicolumn{1}{c}{}&
\multicolumn{1}{c}{cm$^{-1}$}&
\multicolumn{1}{c}{cm$^{-1}$}&
\multicolumn{1}{c}{ation}&
\multicolumn{1}{c}{}&
\multicolumn{1}{c}{cm$^{-1}$}&
\multicolumn{1}{c}{cm$^{-1}$}
\\
 \hline
2[5]   &11/2  & 122~351.810 &$-$20.236 \\
       &9/2   & 122~324.142 &$-$18.980 \\
\\
2[4]   &9/2   &122~355.116 &$-$6.685   & 1[4]&  9/2 &123~629.520&$-$4.606\\
       &7/2   &122~355.553 &$-$6.801   &     &  7/2 &123~637.833&$-$6.417\\
\\
2[3]   &7/2   & 122~351.488 &$-$18.489  & 1[3]&  7/2 &123~615.875 &$-$2.642 & 0[3] & 7/2 &(124~167.229) &\\
       &5/2   & (122~353.541) & &    &  5/2 &123~649.493 &$-$5.687 &      & 5/2 & 124~157.060&$+$15.841\\
\\
2[2]   &5/2   &(122~342.921) &   & 1[2] & 5/2 &(123~637.063) &\\
       &3/2   &(122~336.098) &   &      & 3/2 &(123~646.360) &\\
\\
2[1]   & 3/2 &(122~358.405)  & \\
       & 1/2 &(122~332.608)  &\\
\hline
\end{tabular}
\tablefoot{Energies
between parentheses are predicted values.}
\end{table}