\begin{table}%T1
%\centering
\par
\caption{Sample of energy levels (in Ryd), scaling parameters
for pseudo-orbitals in the Thomas-Fermi-Dirac potential, and mean orbital radii (in~AU) for various
expansions for the Ni{\sc ii} target ion. Calculated energies
are compared with experimental values from \cite{nist}.}\label{t1}
\begin{tabular}{llccccccc}%{@{}llccccccc}
\hline\hline
%\multispan{2}{Levels} &\multispan{7}{c}{Energy~~(Ryd)}\\
\multicolumn{2}{l}{Levels} &\multicolumn{7}{c}{Energy~~(Ryd)}\\
            &     & Exper. & $E$1 & $E$2 & $E$3 & $E$4 & $E$5 & $E$6 \\
\hline 
$\rm 3d^9         $&$\rm ^2D      $&0.0000 & 0.0000& 0.0000& 0.1042& 0.0000&0.0000&0.0000\\
$\rm 3d^8 4s      $&$\rm ^4F      $&0.0797 & 0.0661& 0.0101& 0.0000& 0.0485&0.0658&0.0287\\
$\rm 3d^8 4s      $&$\rm ^2F      $&0.1237 & 0.1175& 0.0626& 0.0621& 0.1087&0.1259&0.0759\\
$\rm 3d^8 4s      $&$\rm ^4P      $&0.2126 & 0.2322& 0.1795& 0.1733& 0.2128&0.2405&0.1956\\
$\rm 3d^8 4s      $&$\rm ^2D      $&0.2184 & 0.2224& 0.1665& 0.1730& 0.2186&0.2375&0.1955\\
$\rm 3d^8 4s      $&$\rm ^2P      $&0.2610 & 0.2822& 0.2305& 0.2339& 0.2723&0.3013&0.2422\\
$\rm 3d^8 4s      $&$\rm ^2G      $&0.2909 & 0.3100& 0.2559& 0.2512& 0.2939&0.3177&0.2714\\
$\rm 3d^7 4s^2    $&$\rm ^4F      $&0.4698 & 0.4291& 0.3700& 0.3349& 0.3963&0.3815&0.3905\\
$\rm 3d^8 4p      $&$\rm ^4D^o    $&0.4734 & 0.4335& 0.3773& 0.3968& 0.4448&0.4615&0.4096\\
$\rm 3d^8 4p      $&$\rm ^4G^o    $&0.4870 & 0.4545& 0.3992& 0.4290& 0.4750&0.4858&0.4265\\
% & & & & & & & \\
$\rm 3d^8 4d      $&$\rm ^4D      $&0.9046 & 1.2943& 0.8933& 0.7512& 1.2673 &0.7865&0.7932\\
$\rm 3d^8 4f      $&$\rm ^2P^o    $&1.0826 &  ...  &  ...  &  ... &0.9746&  ...  &1.1217\\
$\rm 3d^8 5d      $&$\rm ^4D      $&1.0961 &  ...  &  ...  &  ... & ...  & 2.1225&0.9881\\
$\rm 3d^8 5p      $&$\rm ^4D^o    $&0.9523 &  ...  &  ...  &  ... & ...  &  ...  &0.9373\\
$\rm 3d^8 5s      $&$\rm ^2D      $&0.9665 &  ...  &  ...  &  ... & ...  &  ...  &0.8922\\
$\rm 3d^8 6s      $&$\rm ^6S      $&1.0711 &  ...  &  ...  &  ... & ...  &  ...  &1.0712\\
$\rm 3d^8 6d      $&$\rm ^4P      $&1.1809 &  ...  &  ...  &  ... & ...  &  ...  &1.1741\\
\hline
$\lambda_{\bar{\rm 4d}}$ & & & 1.2756 & 1.1756 & 1.0756 & 1.2756 & 1.2756 & 1.2256\\
$\left<R_{\bar{\rm 4d}}\right>$     & & & 3.193  & 4.229  & 5.034  & 3.193  & 3.193 & 3.723 \\ 
$\lambda_{\bar{\rm 4f}}$ & & &  ...   &  ...   &  ...   & 1.200  & ...   & 1.2000\\
$\left<R_{\bar{\rm 4f}}\right>$     & & &  ...   &  ...   &  ...   & 8.852  & ...   & 8.852 \\
$\lambda_{\bar{\rm 5d}}$ & & &  ...   &  ...   &  ...   & ...    &1.5000 & 1.3500\\
$\left<R_{\bar{\rm 5d}}\right>$     & & &  ...   &  ...   &  ...   & ...    &6.050  & 7.005 \\
$\lambda_{\bar{\rm 5s}}$ & & &  ...   &  ...   &  ...   & ...    & ...   & 0.9687\\
$\left<R_{\bar{\rm 5s}}\right>$     & & &  ...   &  ...   &  ...   & ...    & ...   & 6.302 \\ 
$\lambda_{\bar{\rm 6s}}$ & & &  ...   &  ...   &  ...   & ...    & ...   & 1.3000\\
$\left<R_{\bar{\rm 6s}}\right>$     & & &  ...   &  ...   &  ...   & ...    & ...   & 8.273 \\
$\lambda_{\bar{\rm 5p}}$ & & &  ...   &  ...   &  ...   & ...    & ...   & 1.1500\\
$\left<R_{\bar{\rm 5p}}\right>$     & & &  ...   &  ...   &  ...   & ...    & ...   & 6.176 \\
$\lambda_{\bar{\rm 6d}}$ & & &  ...   &  ...   &  ...   & ...    & ...   & 1.6000\\
$\left<R_{\bar{\rm 6d}}\right>$     & & &  ...   &  ...   &  ...   & ...    & ...   &10.361 \\ 
\hline 
\end{tabular}
\end{table}