\begin{table}%t2 
\caption{Comparison of energy levels (in~Ryd) of Fe IX.}
%\begin{center}
\par
{\small
\begin{tabular}{rllrrrrrrr} 
\hline
\hline   
Index  &    Configuration    & Level          &  Expt.    &  GRASP   & FAC1    &   FAC2  &   FAC3   &   FAC4   &   FAC5  \\
\hline
    1  &   3s$^2$3p$^6$      &  $^1$S$_0  $   &  0.00000  &  0.00000 & 0.0000	& 0.0000 &  0.0000  &	0.0000 &  0.0000 \\
    2  &   3s$^2$3p$^5$3d    &  $^3$P$_0^o$   &  3.69767  &  3.74289 & 3.6559	& 3.6566 &  3.6569  &	3.7475 &  3.7333 \\
    3  &   3s$^2$3p$^5$3d    &  $^3$P$_1^o$   &  3.72084  &  3.76622 & 3.6795	& 3.6802 &  3.6804  &	3.7710 &  3.7567 \\
    4  &   3s$^2$3p$^5$3d    &  $^3$P$_2^o$   &  3.76963  &  3.81508 & 3.7288	& 3.7295 &  3.7297  &	3.8200 &  3.8058 \\
    5  &   3s$^2$3p$^5$3d    &  $^3$F$_4^o$   &  3.88026  &  3.94625 & 3.8395	& 3.8346 &  3.8339  &	3.9468 &  3.9343 \\
    6  &   3s$^2$3p$^5$3d    &  $^3$F$_3^o$   &  3.91217  &  3.97928 & 3.8733	& 3.8686 &  3.8679  &	3.9797 &  3.9671 \\
    7  &   3s$^2$3p$^5$3d    &  $^3$F$_2^o$   &  3.95325  &  4.02060 & 3.9157	& 3.9111 &  3.9104  &	4.0215 &  4.0087 \\
    8  &   3s$^2$3p$^5$3d    &  $^3$D$_3^o$   &  4.15184  &  4.23382 & 4.1439	& 4.1443 &  4.1446  &	4.2373 &  4.2219 \\
    9  &   3s$^2$3p$^5$3d    &  $^1$D$_2^o$   &  4.16224  &  4.24821 & 4.1652	& 4.1658 &  4.1661  &	4.2540 &  4.2377 \\
   10  &   3s$^2$3p$^5$3d    &  $^3$D$_1^o$   &  4.19744  &  4.27822 & 4.1912	& 4.1921 &  4.1925  &	4.2836 &  4.2676 \\
   11  &   3s$^2$3p$^5$3d    &  $^3$D$_2^o$   &  4.21567  &  4.29790 & 4.2145	& 4.2154 &  4.2157  &	4.3039 &  4.2878 \\
   12  &   3s$^2$3p$^5$3d    &  $^1$F$_3^o$   &  4.24494  &  4.32669 & 4.2361	& 4.2356 &  4.2358  &	4.3281 &  4.3134 \\
   13  &   3s$^2$3p$^5$3d    &  $^1$P$_1^o$   &  5.32678  &  5.47652 & 5.5329	& 5.5335 &  5.5337  &	5.4598 &  5.4548 \\
   14  &   3s3p$^6$3d	     &  $^3$D$_1  $   &  6.62249  &  6.71520 & 7.1364	& 7.1292 &  7.1267  &	6.7176 &  6.6837 \\
   15  &   3s3p$^6$3d	     &  $^3$D$_2  $   &  6.63001  &  6.72270 & 7.1432	& 7.1360 &  7.1335  &	6.7251 &  6.6912 \\
   16  &   3s3p$^6$3d	     &  $^3$D$_3  $   &  6.64254  &  6.73509 & 7.1541	& 7.1468 &  7.1443  &	6.7377 &  6.7038 \\
   17  &   3s3p$^6$3d	     &  $^1$D$_2  $   &  6.83333  &  6.94815 & 7.5845	& 7.5846 &  7.5849  &	6.9447 &  6.8952 \\
\hline
\end{tabular}}
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\par
%\begin{flushleft}
{\small
\hspace*{2.3cm} Expt.: NIST data from {\tt http://physics.nist.gov/PhysRefData} \\
\hspace*{2.3cm} GRASP: Present calculations from the GRASP code with 2471 levels.\\
\hspace*{2.3cm} FAC1:  Present calculations from the FAC code with 87 levels. \\
\hspace*{2.3cm} FAC2:  Present calculations from the FAC code with 136 levels. \\
\hspace*{2.3cm} FAC3:  Present calculations from the FAC code with 220 levels. \\
\hspace*{2.3cm} FAC4:  Present calculations from the FAC code with 1219 levels. \\
\hspace*{2.3cm} FAC5:  Present calculations from the FAC code with 6284 levels.}
%\end{flushleft}
\end{table}