\begin{table}%t3
%\centering
\par
\caption{The details of the four most important configurations in 
\ion{Fe}{x}. The percentage of level mixing ($>$10\%) is indicated
in second column. For example, level 27 is mixed with 
level~3 of configuration~c2 by~23\%.
$E_{\rm best}$ indicates the best energies (\cm)
which we propose in this work.
The uncertainties in the energies reflect the 
estimated errors in the wavelength measurements.
Levels with uncertain identification are assigned 
an uncertainty of 500~\cm.
The following columns indicate the differences between  our~$E_{\rm best}$ and the energies from NIST~$E_{\rm NIST}$, the collisional 
calculations~$E_{\rm CC}$, and the adjusted SS values~$E_{\rm SS}$. 
Levels are ordered according to the 
energies~$E_{\rm CC}$ from the  collisional calculations.
\label{tab:levels}} 
{ \begin{tabular}[c]{@{}rlcrrrrr@{}}
\hline\hline\noalign{\smallskip}
%\begin{longtable}{@{}|rlcrrrrr|@{}}
 $i$ &  Configuration (\% purity) & Term & $E_{\rm best}$ & $E_{\rm  best}-E_{\rm NIST}$ & $E_{\rm best}-E_{\rm CC}$  &  $E_{\rm  best}-E_{\rm SS}$  & \\ 
\noalign{\smallskip}\hline\noalign{\smallskip}
%
%fe_10_16conf_cor_t_be_IC.out.el.tex
%
1 & 3s$^2$ 3p$^5$(96\%) & $^2$P$_{3/2}^{\rm o}$ &          0.0~$\pm$~0 & 0 & 0 & 0  &  \\
2 & 3s$^2$ 3p$^5$(96\%) & $^2$P$_{1/2}^{\rm o}$ &      15683.1~$\pm$~1 & 0 & $+$912 & $-$143  &  \\
3 & 3s 3p$^6$(72\%) +27(c3 24\%) & $^2$S$_{1/2}^{\rm e}$ &     289236.0~$\pm$~5 & --13 & $+$517 & $-$7  &  \\
4 & 3s$^2$ 3p$^4$ ($^3$P)  3d(93\%) & $^4$D$_{5/2}^{\rm e}$ &     388713.5~$\pm$~5 & 4.5 & $-$4255 & $+$34  &  \\
5 & 3s$^2$ 3p$^4$ ($^3$P)  3d(94\%) & $^4$D$_{7/2}^{\rm e}$ &     388708.0~$\pm$~5 & --1 & $-$4371 & $-$116  &  \\
6 & 3s$^2$ 3p$^4$ ($^3$P)  3d(92\%) & $^4$D$_{3/2}^{\rm e}$ &     390019.0~$\pm$~50 & --31 & $-$4047 & $+$224  &  \\
7 & 3s$^2$ 3p$^4$ ($^3$P)  3d(92\%) & $^4$D$_{1/2}^{\rm e}$ &     391554.0~$\pm$~50 & --1 & $-$3829 & $+$351  &  \\
8 & 3s$^2$ 3p$^4$ ($^3$P)  3d(92\%) & $^4$F$_{9/2}^{\rm e}$ &     417652.0~$\pm$~5 & --1 & $-$6263 & $+$233  &  \\
9 & 3s$^2$ 3p$^4$ ($^1$D)  3d(41\%) +29(49\%) & $^2$P$_{1/2}^{\rm e}$ &     414249.0~$\pm$~500 &  --  & $-$10983 & 0  &  \\
10 & 3s$^2$ 3p$^4$ ($^3$P)  3d(89\%) & $^4$F$_{7/2}^{\rm e}$ &     422785.0~$\pm$~10 & --10 & $-$5848 & $+$334  &  \\
11 & 3s$^2$ 3p$^4$ ($^3$P)  3d(95\%) & $^4$F$_{5/2}^{\rm e}$ &     426260.0~$\pm$~500 & --503 & $-$5885 & 0  &  \\
12 & 3s$^2$ 3p$^4$ ($^3$P)  3d(86\%) & $^4$F$_{3/2}^{\rm e}$ &     427604.0~$\pm$~500 & --694 & $-$5529 & 0  &  \\
13 & 3s$^2$ 3p$^4$ ($^1$D)  3d(50\%) +28(38\%) & $^2$P$_{3/2}^{\rm e}$ &     422844.0~$\pm$~500 & --9084 & $-$10837 & $+$161  &  \\
14 & 3s$^2$ 3p$^4$ ($^3$P)  3d(95\%) & $^4$P$_{1/2}^{\rm e}$ &     433526.0~$\pm$~500 & --1274 & $-$6959 & 0  &  \\
%
15 & 3s$^2$ 3p$^4$ ($^1$D)  3d(28\%) +31(26\%) +25(25\%) & $^2$D$_{3/2}^{\rm e}$ &    433088.0~$\pm$~500 & --1526 & $-$7507 & 0 &  \\
16 & 3s$^2$ 3p$^4$ ($^3$P)  3d(83\%) & $^4$P$_{3/2}^{\rm e}$ &     438168.0~$\pm$~500 &  --  & $-$7036 & 0  &  \\
17 & 3s$^2$ 3p$^4$ ($^3$P)  3d(21\%) +30(15\%) +26(11\%) +19(45\%) & $^2$D$_{5/2}^{\rm e}$ &     440125.0~$\pm$~500 & --1728 & $-$7493 & $-$355  &  \\
18 & 3s$^2$ 3p$^4$ ($^3$P)  3d(50\%) +21(31\%) & $^2$F$_{7/2}^{\rm e}$ &     440839.0~$\pm$~5 & --1 & $-$6999 & $-$134  &  \\
19 & 3s$^2$ 3p$^4$ ($^1$D)  3d(48\%) +17(11\%) +30(12\%) +26(19\%) & $^4$P$_{5/2}^{\rm e}$ &    442760.0~$\pm$~500 &  --  & $-$6833 & $-$161  &  \\
20 & 3s$^2$ 3p$^4$ ($^1$D)  3d(92\%) & $^2$G$_{9/2}^{\rm e}$ &     450754.0~$\pm$~5 & 3 & $-$7070 & $-$28  &  \\
21 & 3s$^2$ 3p$^4$ ($^1$D)  3d(62\%) +18(25\%) & $^2$G$_{7/2}^{\rm e}$ &     451083.0~$\pm$~5 & --1 & $-$6850 & $-$14  &  \\
22 & 3s$^2$ 3p$^4$ ($^3$P)  3d(72\%) +23(20\%) & $^2$F$_{5/2}^{\rm e}$ &     454036.0~$\pm$~50 & 1306 & $-$6312 & $-$126  &  \\
23 & 3s$^2$ 3p$^4$ ($^1$D)  3d(76\%) +22(17\%) & $^2$F$_{5/2}^{\rm e}$ &     482046.0~$\pm$~50 &  --  & $-$7382 & $-$92  &  \\
24 & 3s$^2$ 3p$^4$ ($^1$D)  3d(78\%) +18(17\%) & $^2$F$_{7/2}^{\rm e}$ &     485982.0~$\pm$~5 & --1 & $-$7287 & $-$48  &  \\
25 & 3s$^2$ 3p$^4$ ($^1$S)  3d(57\%) +15(35\%) & $^2$D$_{3/2}^{\rm e}$ &     511992.0~$\pm$~500 & 192 & $-$7614 & 0  &  \\
26 & 3s$^2$ 3p$^4$ ($^1$S)  3d(49\%) +17(42\%) & $^2$D$_{5/2}^{\rm e}$ &     516222.0~$\pm$~50 &  --  & $-$7664 & 0  &  \\
27 & 3s$^2$ 3p$^4$ ($^1$D)  3d(70\%) +3(c2 23\%) & $^2$S$_{1/2}^{\rm e}$ &     541897.0~$\pm$~5 & 18 & $-$13264 & $+$34  &  \\
28 & 3s$^2$ 3p$^4$ ($^3$P)  3d(50\%) +13(39\%) & $^2$P$_{3/2}^{\rm e}$ &     564208.0~$\pm$~5 & 10 & $-$12461 & $-$137  &  \\
29 & 3s$^2$ 3p$^4$ ($^3$P)  3d(43\%) +9(51\%) & $^2$P$_{1/2}^{\rm e}$ &     569882.0~$\pm$~20 & --103 & $-$12494 & $-$387  &  \\
30 & 3s$^2$ 3p$^4$ ($^3$P)  3d(66\%) +17(18\%) +26(10\%) & $^2$D$_{5/2}^{\rm e}$ &     572964.0~$\pm$~5 & 10 & $-$14240 & $-$100  &  \\
31 & 3s$^2$ 3p$^4$ ($^3$P)  3d(61\%) +15(21\%) & $^2$D$_{3/2}^{\rm e}$ &     586254.0~$\pm$~5 & 10 & $-$13570 & $+$68  &  \\
32 & 3s 3p$^5$ ($^3$P)  3d(82\%) & $^4$P$_{1/2}^{\rm o}$ &     661175.0~$\pm$~500 &  --  & $-$49672 & 0  &  \\
33 & 3s 3p$^5$ ($^3$P)  3d(81\%) & $^4$P$_{3/2}^{\rm o}$ &     663782.0~$\pm$~500 &  --  & $-$49875 & 0  &  \\
34 & 3s 3p$^5$ ($^3$P)  3d(81\%) & $^4$P$_{5/2}^{\rm o}$ &     668467.0~$\pm$~500 &  --  & $-$50143 & 0  &  \\
35 & 3s 3p$^5$ ($^3$P)  3d(85\%) +(c5 10\%) & $^4$F$_{9/2}^{\rm o}$ &     694225.0~$\pm$~500 & --2436 & $-$36455 & 0  &  \\
36 & 3s 3p$^5$ ($^3$P)  3d(82\%) +(c5 10\%) & $^4$F$_{7/2}^{\rm o}$ &     697016.0~$\pm$~500 & --2476 & $-$36655 & 0  &  \\
37 & 3s 3p$^5$ ($^3$P)  3d(82\%) +(c5 10\%) & $^4$F$_{5/2}^{\rm o}$ &     700011.0~$\pm$~500 & --2574 & $-$36665 & 0  &  \\
38 & 3s 3p$^5$ ($^3$P)  3d(82\%) +(c5 10\%) & $^4$F$_{3/2}^{\rm o}$ &     702749.0~$\pm$~500 & --2681 & $-$36540 & 0  &  \\
39 & 3s 3p$^5$ ($^3$P)  3d(78\%) & $^4$D$_{7/2}^{\rm o}$ &     726123.0~$\pm$~500 &  --  & $-$40893 & 0  &  \\
40 & 3s 3p$^5$ ($^3$P)  3d(77\%) & $^4$D$_{5/2}^{\rm o}$ &     727681.0~$\pm$~500 &  --  & $-$41025 & 0  &  \\
41 & 3s 3p$^5$ ($^3$P)  3d(79\%) & $^4$D$_{1/2}^{\rm o}$ &     727262.0~$\pm$~500 &  --  & $-$41541 & 0  &  \\
42 & 3s 3p$^5$ ($^3$P)  3d(78\%) & $^4$D$_{3/2}^{\rm o}$ &     727821.0~$\pm$~500 &  --  & $-$41219 & 0  &  \\
43 & 3s 3p$^5$ ($^3$P)  3d(73\%) +(c5 11\%) & $^2$F$_{7/2}^{\rm o}$ &     737368.0~$\pm$~30 &  --  & $-$55850 & $-$31  &  \\
44 & 3s 3p$^5$ ($^3$P)  3d(49\%) +46(27\%) & $^2$D$_{5/2}^{\rm o}$ &     741260.0~$\pm$~500 &  --  & $-$54926 & 0  &  \\
45 & 3s 3p$^5$ ($^3$P)  3d(72\%) & $^2$D$_{3/2}^{\rm o}$ &     745812.0~$\pm$~500 &  --  & $-$53573 & 0  &  \\
46 & 3s 3p$^5$ ($^3$P)  3d(49\%) +44(27\%) & $^2$F$_{5/2}^{\rm o}$ &     749382.0~$\pm$~500 &  --  & $-$52559 & 0  &  \\
47 & 3s 3p$^5$ ($^1$P)  3d(41\%) +54(24\%) +(c5 24\%) & $^2$P$_{1/2}^{\rm o}$ &     760037.0~$\pm$~500 &  --  & $-$67068 & 0  &  \\
48 & 3s 3p$^5$ ($^1$P)  3d(38\%) +53(19\%) +(c5 22\%) & $^2$P$_{3/2}^{\rm o}$ &     767867.0~$\pm$~500 &  --  & $-$67057 & 0  &  \\
49 & 3s 3p$^5$ ($^1$P)  3d(57\%) +(c5 12\%) & $^2$F$_{5/2}^{\rm o}$ &     789807.0~$\pm$~500 &  --  & $-$81159 & 0  &  \\
50 & 3s 3p$^5$ ($^1$P)  3d(55\%) +(c5 13\%) & $^2$F$_{7/2}^{\rm o}$ &     793645.0~$\pm$~500 &  --  & $-$78575 & 0  &  \\
51 & 3s 3p$^5$ ($^1$P)  3d(41\%) +(c5 14\%) & $^2$D$_{3/2}^{\rm o}$ &     818347.0~$\pm$~500 &  --  & $-$81018 & 0  &  \\
52 & 3s 3p$^5$ ($^1$P)  3d(36\%) +(c5 12\%) +(c5 12\%) & $^2$D$_{5/2}^{\rm o}$ &     819974.0~$\pm$~500 &  --  & $-$80209 & 0  &  \\
53 & 3s 3p$^5$ ($^3$P)  3d(54\%) +(c5 18\%) & $^2$P$_{3/2}^{\rm o}$ &     865405.0~$\pm$~500 &  --  & $-$108711 & 0  &  \\
54 & 3s 3p$^5$ ($^3$P)  3d(53\%) +(c5 22\%) & $^2$P$_{1/2}^{\rm o}$ &     864829.0~$\pm$~500 &  --  & $-$110431 & 0  &  \\
%
\noalign{\smallskip}\hline
%
\end{tabular}}
\end{table}