\begin{table} %t3
\caption{\label{tab3}Calculated and observed fine structure energy levels. (a) With
neither 2-body relativistic operators nor TECs;
  (b) including 2-body relativistic effects, but without TECs; (c) with
2-body relativistic operators and TECs.}
%\centering
\par
\begin{tabular}{lcccc}
            \hline\hline
 Level     &\multispan{3}{\ Present}                       & Experiment \\
           & (a) & (b) & (c) & \\
            \hline
$\rm 4F_{9/2}$&  0.000000    &0.000000  &0.000000   &0.000000\\
$\rm 4F_{7/2}$&  0.011524    &0.010965  &0.011006   &0.010841\\
$\rm 4F_{5/2}$&  0.019826    &0.018864  &0.018908   &0.018613\\
$\rm 4F_{3/2}$&  0.025453    &0.024230  &0.024266   &0.023885\\
\noalign{\smallskip} 
$\rm  4P_{5/2}$&  0.175599    &0.175910  &0.165389   &0.165109\\
$\rm  4P_{3/2}$&  0.177558    &0.177976  &0.167690   &0.167371\\
$\rm  4P_{1/2}$&  0.184077    &0.183526  &0.173089   &0.172762\\
 \noalign{\smallskip} 
$ \rm 2G_{9/2}$&  0.201011    &0.200450  &0.180734   &0.180701\\
$\rm  2G_{7/2}$&  0.211793    &0.210452  &0.190982   &0.190889\\
 \noalign{\smallskip} 
$\rm  2P_{3/2}$&  0.222958    &0.223050  &0.215622   &0.215505\\
$\rm  2P_{1/2}$&  0.233077    &0.232044  &0.224644   &0.224640\\
 \noalign{\smallskip} 
$\rm  2H_{11/2}$& 0.281112    &0.279733  &0.243154   &0.242844\\
$\rm  2H_{9/2}$&  0.290788    &0.288895  &0.252627   &0.252217\\
 \noalign{\smallskip} 
$\rm  2D_{5/2}$&  0.253152    &0.253031  &0.246800   &0.246921\\
$\rm  2D_{3/2}$&  0.271001    &0.269100  &0.262786   &0.262242\\
            \hline
         \end{tabular}
\end{table}