\begin{table}%t1
\caption{\label{tab1}Target levels  of Fe~X and their threshold energies (in~Ryd).}
%\begin{center}
{
\begin{tabular}{rllrrrllrr} 
\hline
\hline
Index    & Configuration              & Level           & GRASP$^a$ & GRASP$^b$ & Index       & Configuration                     & Level            & GRASP$^a$ & GRASP$^b$   \\ 
\hline
  1......& 3s$^2$3p$^5$               &   $^2$P$^\circ_{3/2}$   &  0.0000  &   0.0000  &  46......& 3s3p$^5$($^3$P)3d             &   $^2$D$^\circ_{5/2}$        &  7.0780  &  7.0664  \\
  2......& 3s$^2$3p$^5$               &   $^2$P$^\circ_{1/2}$   &  0.1461  &   0.1426  &  47......& 3s3p$^5$($^1$P)3d             &   $^2$P$^\circ_{1/2}$        &  7.1552  &  7.1458  \\
  3......& 3s3p$^6$                   &   $^2$S$_{1/2}$     &  2.6066  &   2.6024  &  48......& 3s3p$^5$($^1$P)3d                 &   $^2$P$^\circ_{3/2}$        &  7.2331  &  7.2206  \\
  4......& 3s$^2$3p$^4$ ($^3$P)3d     &   $^4$D$_{5/2}$     &  3.5545  &   3.5473  &  49......& 3s$^2$3p$^3$($^4$S)3d$^2$($^3$F)  &   $^6$F$^\circ_{1/2}$        &  7.2842  &  7.2722  \\
  $^\star$5......& 3s$^2$3p$^4$ ($^3$P)3d     &   $^4$D$_{7/2}$     &  3.5550  &   3.5468  &  50......& 3s$^2$3p$^3$($^4$S)3d$^2$($^3$F)  &   $^6$F$^\circ_{3/2}$        &  7.2859  &  7.2736  \\
  6......& 3s$^2$3p$^4$ ($^3$P)3d     &   $^4$D$_{3/2}$     &  3.5653  &   3.5587  &  51......& 3s$^2$3p$^3$($^4$S)3d$^2$($^3$F)  &   $^6$F$^\circ_{5/2}$        &  7.2892  &  7.2762  \\
  7......& 3s$^2$3p$^4$ ($^3$P)3d     &   $^4$D$_{1/2}$     &  3.5791  &   3.5724  &  52......& 3s$^2$3p$^3$($^4$S)3d$^2$($^3$F)  &   $^6$F$^\circ_{7/2}$        &  7.2942  &  7.2803  \\
  8......& 3s$^2$3p$^4$ ($^3$P)3d     &   $^4$F$_{9/2}$     &  3.8485  &   3.8407  &  53......& 3s$^2$3p$^3$($^4$S)3d$^2$($^3$F)  &   $^6$F$^\circ_{9/2}$        &  7.3012  &  7.2862  \\
  9......& 3s$^2$3p$^4$ ($^1$D)3d     &   $^2$P$_{1/2}$     &  3.8673  &   3.8608  &  54......& 3s$^2$3p$^3$($^4$S)3d$^2$($^3$F)  &   $^6$F$^\circ_{11/2}$   &  7.3101  &  7.2935  \\
 10......& 3s$^2$3p$^4$ ($^3$P)3d     &   $^4$F$_{7/2}$     &  3.8954  &   3.8876  &  55......& 3s3p$^5$($^1$P)3d                 &   $^2$F$^\circ_{5/2}$        &  7.4346  &  7.4237  \\
 11......& 3s$^2$3p$^4$ ($^3$P)3d     &   $^4$F$_{5/2}$     &  3.9301  &   3.9220  &  56......& 3s3p$^5$($^1$P)3d                 &   $^2$F$^\circ_{7/2}$        &  7.4756  &  7.4626  \\
 12......& 3s$^2$3p$^4$ ($^3$P)3d     &   $^4$F$_{3/2}$     &  3.9421  &   3.9345  &  57......& 3s$^2$3p$^3$($^4$S)3d$^2$($^3$P)  &   $^6$P$^\circ_{3/2}$        &  7.5391  &  7.5263  \\
 13......& 3s$^2$3p$^4$ ($^1$D)3d     &   $^2$P$_{3/2}$     &  3.9451  &   3.9375  &  58......& 3s$^2$3p$^3$($^4$S)3d$^2$($^3$P)  &   $^6$P$^\circ_{5/2}$        &  7.5427  &  7.5295  \\
 14......& 3s$^2$3p$^4$ ($^1$D)3d     &   $^2$D$_{3/2}$     &  4.0010  &   3.9942  &  59......& 3s$^2$3p$^3$($^4$S)3d$^2$($^3$P)  &   $^6$P$^\circ_{7/2}$        &  7.5470  &  7.5323  \\
 15......& 3s$^2$3p$^4$ ($^3$P)3d     &   $^4$P$_{1/2}$     &  4.0050  &   3.9992  &  60......& 3s3p$^5$($^1$P)3d                 &   $^2$D$^\circ_{3/2}$        &  7.6883  &  7.6777  \\
 16......& 3s$^2$3p$^4$ ($^3$P)3d     &   $^4$P$_{3/2}$     &  4.0516  &   4.0435  &  61......& 3s3p$^5$($^1$P)3d                 &   $^2$D$^\circ_{5/2}$        &  7.7055  &  7.6931  \\
 17......& 3s$^2$3p$^4$ ($^3$P)3d     &   $^4$P$_{5/2}$     &  4.0700  &   4.0615  &  62......& 3s$^2$3p$^3$($^4$S)3d$^2$($^1$D)  &   $^4$D$^\circ_{7/2}$        &  7.7747  &  7.7604  \\
 18......& 3s$^2$3p$^4$ ($^3$P)3d     &   $^2$F$_{7/2}$     &  4.0785  &   4.0716  &  63......& 3s$^2$3p$^3$($^4$S)3d$^2$($^1$D)  &   $^4$D$^\circ_{5/2}$        &  7.7815  &  7.7680  \\
 19......& 3s$^2$3p$^4$ ($^1$D)3d     &   $^2$D$_{5/2}$     &  4.0932  &   4.0836  &  64......& 3s$^2$3p$^3$($^4$S)3d$^2$($^1$D)  &   $^4$D$^\circ_{3/2}$        &  7.7860  &  7.7734  \\
 20......& 3s$^2$3p$^4$ ($^1$D)3d     &   $^2$G$_{9/2}$     &  4.1716  &   4.1612  &  65......& 3s$^2$3p$^3$($^4$S)3d$^2$($^1$D)  &   $^4$D$^\circ_{1/2}$        &  7.7977  &  7.7850  \\
 21......& 3s$^2$3p$^4$ ($^1$D)3d     &   $^2$G$_{7/2}$     &  4.1750  &   4.1660  &  66......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$F)  &   $^4$G$^\circ_{5/2}$        &  7.8071  &  7.7946  \\
 22......& 3s$^2$3p$^4$ ($^3$P)3d     &   $^2$F$_{5/2}$     &  4.2027  &   4.1935  &  67......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$P)  &   $^4$P$^\circ_{1/2}$        &  7.8082  &  7.7951  \\
 23......& 3s$^2$3p$^4$ ($^1$D)3d     &   $^2$F$_{5/2}$     &  4.4736  &   4.4664  &  68......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$F)  &   $^4$G$^\circ_{7/2}$        &  7.8179  &  7.8046  \\
 24......& 3s$^2$3p$^4$ ($^1$D)3d     &   $^2$F$_{7/2}$     &  4.5114  &   4.5020  &  69......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$P)  &   $^4$F$^\circ_{3/2}$        &  7.8248  &  7.8127  \\
 25......& 3s$^2$3p$^4$ ($^1$S)3d     &   $^2$D$_{3/2}$     &  4.7315  &   4.7243  &  70......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$F)  &   $^4$G$^\circ_{9/2}$        &  7.8380  &  7.8230  \\
 26......& 3s$^2$3p$^4$ ($^1$S)3d     &   $^2$D$_{5/2}$     &  4.7715  &   4.7618  &  71......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$P)  &   $^4$P$^\circ_{3/2}$        &  7.8407  &  7.8272  \\
 27......& 3s$^2$3p$^4$ ($^1$D)3d     &   $^2$S$_{1/2}$     &  5.0297  &   5.0228  &  72......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$P)  &   $^4$F$^\circ_{5/2}$        &  7.8590  &  7.8452  \\
 28......& 3s$^2$3p$^4$ ($^3$P)3d     &   $^2$P$_{3/2}$     &  5.2800  &   5.2727  &  $^\star$73......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$F)  &   $^4$G$^\circ_{11/2}$   &  7.8593  &  7.8426  \\
 29......& 3s$^2$3p$^4$ ($^3$P)3d     &   $^2$P$_{1/2}$     &  5.3332  &   5.3243  &  74......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$P)  &   $^4$P$^\circ_{5/2}$        &  7.8736  &  7.8591  \\
 30......& 3s$^2$3p$^4$ ($^3$P)3d     &   $^2$D$_{5/2}$     &  5.3503  &   5.3428  &  75......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$P)  &   $^4$F$^\circ_{7/2}$        &  7.8963  &  7.8813  \\
 31......& 3s$^2$3p$^4$ ($^3$P)3d     &   $^2$D$_{3/2}$     &  5.4739  &   5.4633  &  76......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$P)  &   $^4$F$^\circ_{9/2}$        &  7.9270  &  7.9102  \\
 32......& 3s3p$^5$($^3$P)3d          &   $^4$P$^\circ_{1/2}$   &  6.2330  &   6.2252  &  77......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$F)  &   $^4$H$^\circ_{7/2}$    &  7.9866  &  7.9746  \\
 33......& 3s3p$^5$($^3$P)3d          &   $^4$P$^\circ_{3/2}$   &  6.2578  &   6.2485  &  78......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$F)  &   $^4$H$^\circ_{9/2}$    &  7.9968  &  7.9833  \\
 34......& 3s3p$^5$($^3$P)3d          &   $^4$P$^\circ_{5/2}$   &  6.3016  &   6.2905  &  79......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$F)  &   $^4$H$^\circ_{11/2}$   &  8.0118  &  7.9964  \\
 35......& 3s3p$^5$($^3$P)3d          &   $^4$F$^\circ_{9/2}$   &  6.5623  &   6.5516  &  80......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$F)  &   $^4$H$^\circ_{13/2}$   &  8.0378  &  8.0197  \\
 36......& 3s3p$^5$($^3$P)3d          &   $^4$F$^\circ_{7/2}$   &  6.5873  &   6.5771  &  81......& 3s$^2$3p$^3$($^2$D)3d$^2$($^1$D)  &   $^2$F$^\circ_{7/2}$    &  8.0691  &  8.0553  \\
 37......& 3s3p$^5$($^3$P)3d          &   $^4$F$^\circ_{5/2}$   &  6.6145  &   6.6044  &  82......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$F)  &   $^2$H$^\circ_{9/2}$    &  8.1123  &  8.0983  \\
 38......& 3s3p$^5$($^3$P)3d          &   $^4$F$^\circ_{3/2}$   &  6.6395  &   6.6293  &  83......& 3s$^2$3p$^3$($^2$D)3d$^2$($^1$D)  &   $^2$F$^\circ_{5/2}$    &  8.1176  &  8.1038  \\
 39......& 3s3p$^5$($^3$P)3d          &   $^4$D$^\circ_{7/2}$   &  6.8612  &   6.8504  &  84......& 3s$^2$3p$^3$($^2$D)3d$^2$($^1$D)  &   $^2$D$^\circ_{3/2}$    &  8.1333  &  8.1211  \\
 40......& 3s3p$^5$($^3$P)3d          &   $^4$D$^\circ_{1/2}$   &  6.8721  &   6.8630  &  $^\star$85......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$F)  &   $^2$H$^\circ_{11/2}$   &  8.1336  &  8.1180  \\
 41......& 3s3p$^5$($^3$P)3d          &   $^4$D$^\circ_{5/2}$   &  6.8767  &   6.8662  &  86......& 3s$^2$3p$^3$($^2$P)3d$^2$($^3$F)  &   $^4$G$^\circ_{5/2}$    &  8.1999  &  8.1863  \\
 42......& 3s3p$^5$($^3$P)3d          &   $^4$D$^\circ_{3/2}$   &  6.8777  &   6.8678  &  87......& 3s$^2$3p$^3$($^2$P)3d$^2$($^3$F)  &   $^4$G$^\circ_{7/2}$    &  8.2122  &  8.1983  \\
 43......& 3s3p$^5$($^3$P)3d          &   $^2$F$^\circ_{7/2}$   &  6.9369  &   6.9268  &  88......& 3s3p$^5$($^3$P)3d             &   $^2$P$^\circ_{1/2}$        &  8.2169  &  8.2058  \\
 44......& 3s3p$^5$($^3$P)3d          &   $^2$F$^\circ_{5/2}$   &  6.9965  &   6.9859  &  $^\star$89......& 3s$^2$3p$^3$($^2$D)3d$^2$($^3$F)  &   $^2$D$^\circ_{5/2}$    &  8.2186  &  8.2031  \\
 45......& 3s3p$^5$($^3$P)3d          &   $^2$D$^\circ_{3/2}$   &  7.0612  &   7.0510  &  90......& 3s3p$^5$($^3$P)3d             &   $^2$P$^\circ_{3/2}$        &  8.2235  &  8.2119  \\
\hline 
\end{tabular}}
\parbox{16.5cm}{
$^a$  Present results {\em without} Breit and QED corrections.\\                  $^b$  Present results  {\em with} Breit and QED corrections.\\
$^\star$ The level has changed order with the inclusion of Breit and QED corrections.  }
%\end{center}
\par
\end{table}