\begin{table}%t1 \caption{\label{tab:energies1}Level energies for \ion{Fe}{vii}.} \small%\centerline { \begin{tabular}{@{}rlcllllll@{}} \hline\hline \noalign{\smallskip} $i$ & Conf. & Lev. & $E_{\rm exp}$ & $E_{\rm Bench.}$ & $E_{\rm NIST}$ & $E_{\rm WB08}$ & \\ \noalign{\smallskip}\hline\noalign{\smallskip} 1 & 3s$^2$ 3p$^6$ 3d$^2$ & $^3$F$_{2}$ & 0.0 & 0.0 & 0.0 (0) & 0.0 (0) & \\ 2 & 3s$^2$ 3p$^6$ 3d$^2$ & $^3$F$_{3}$ & 1051.5 & 1192.0 (140.5) & 1051.5 (0) & 1280.0 (--229) & \\ 3 & 3s$^2$ 3p$^6$ 3d$^2$ & $^3$F$_{4}$ & 2331.5 & 2635.0 (303.5) & 2331.5 (0) & 2856.0 (--525) & \\ 4 & 3s$^2$ 3p$^6$ 3d$^2$ & $^1$D$_{2}$ & 17~475.5 & 17~436.0 (39.5) & 17~475.5 (0) & 18~269.0 (--794) & \\ 5 & 3s$^2$ 3p$^6$ 3d$^2$ & $^3$P$_{0}$ & 20~040.3 & 19~949.0 (91.3) & 20~040.3 (0) & 21~313.0 (--1273) & \\ 6 & 3s$^2$ 3p$^6$ 3d$^2$ & $^3$P$_{1}$ & 20~430.1 & 20~389.0 (41.1) & 20~430.1 (0) & 21~782.0 (--1352) & \\ 7 & 3s$^2$ 3p$^6$ 3d$^2$ & $^3$P$_{2}$ & 21~278.6 & 21~373.0 ($-$94.4) & 21~278.6 (0) & 22~869.0 (--1590) & \\ 8 & 3s$^2$ 3p$^6$ 3d$^2$ & $^1$G$_{4}$ & 28~927.3 & 28~933.0 ($-$5.7) & 28~927.3 (0) & 32~504.0 (--3577) & \\ 9 & 3s$^2$ 3p$^6$ 3d$^2$ & $^1$S$_{0}$ & 67~078.3 & 67~081.0 ($-$2.7) & 67~078.3 (0) & 67~906.0 (--828) & \\ 10 & 3s$^2$ 3p$^6$ 3d 4s & $^3$D$_{1}$ & 344~463.3 & 344~398.0 (65.3) & 344~463.3 (0) & 341~232.0 (3231) & \\ 11 & 3s$^2$ 3p$^6$ 3d 4s & $^3$D$_{2}$ & 345~028.7 & 344~990.0 (38.7) & 345~028.7 (0) & 341~875.0 (3154) & \\ 12 & 3s$^2$ 3p$^6$ 3d 4s & $^3$D$_{3}$ & 346~262.2 & 346~310.0 ($-$47.8) & 346~262.2 (0) & 343~256.0 (3006) & \\ 13 & 3s$^2$ 3p$^6$ 3d 4s & $^1$D$_{2}$ & 350~332.6 & 350~355.0 ($-$22.4) & 350~332.6 (0) & 347~957.0 (2376) & \\ \noalign{\smallskip} 19 & 3s$^2$~3p$^5$~3d$^3$ & $^5$D$_{4}$ & 385~950.0 & 386~026.0 ($-$76.0) & -- & 399~401.0 (--13~451) & \\ 20 & 3s$^2$~3p$^5$~3d$^3$ & $^5$F$_{5}$ & 395~953.0 & 395~927.0 (26.0) & -- & 408~229.0 (--12~276) & \\ 22 & 3s$^2$~3p$^5$~3d$^3$ & $^5$F$_{4}$ & 396~778 & 396~783.0 ($-$5) & -- & 409~084.0 (--12~306) & \\ 25 & 3s$^2$ 3p$^6$ 3d 4p & $^1$D$_{2}$ & 425~386.1 & 426~421.0 ($-$1034.9) & 425~386.1 (0) & 421~304.0 (4082) & \\ 27 & 3s$^2$ 3p$^6$ 3d 4p & $^3$D$_{1}$ & 425~128.6 & 429~121.0 ($-$3992.4) & 425~128.6 (0) & 422~621.0 (2508) & \\ 28 & 3s$^2$ 3p$^6$ 3d 4p & $^3$D$_{2}$ & 427~784.7 & 430~017.0 ($-$2232.3) & 427~784.7 (0) & 423~676.0 (4109) & \\ 30 & 3s$^2$~3p$^5$~3d$^3$ & $^3$D$_{2}$ & 411~173.0 & 416~090.0 ($-$4917.0) & -- & 424~125.0 (--12~952) & \\ 31 & 3s$^2$ 3p$^6$ 3d 4p & $^3$D$_{3}$ & 430~948.6 & 430~850.0 (98.6) & 430~948.6 (0) & 424~636.0 (6313) & \\ 32 & 3s$^2$ 3p$^6$ 3d 4p & $^3$F$_{3}$ & 431~609.5 & 432~222.0 ($-$612.5) & 431~609.5 (0) & 425~799.0 (5811) & \\ 35 & 3s$^2$ 3p$^6$ 3d 4p & $^3$F$_{2}$ & 430~213.4 & 430~455.0 ($-$241.6) & 430~213.4 (0) & 427~600.0 (2613) & \\ 36 & 3s$^2$ 3p$^6$ 3d 4p & $^3$F$_{4}$ & 433~871.2 & 433~727.0 (144.2) & 433~871.2 (0) & 428~464.0 (5407) & \\ 37 & 3s$^2$~3p$^5$~3d$^3$ & $^3$F$_{2}$ & 414~901.0 & 418~828.0 ($-$3927.0) & -- & 431~058.0 (--16~157) & \\ 44 & 3s$^2$ 3p$^6$ 3d 4p & $^3$P$_{2}$ & 437~558.0 & 436~964.0 (594.0) & 437~558.0 (0) & 434~356.0 (3202) & \\ 46 & 3s$^2$ 3p$^6$ 3d 4p & $^1$F$_{3}$ & 439~811.6 & 439~825.0 ($-$13.4) & 439~811.6 (0) & 437~964.0 (1848) & \\ 51 & 3s$^2$~3p$^5$~3d$^3$ & $^3$G$_{4}$ & 426~258.0 & 426~222.0 (36.0) & -- & 439~690.0 (--13~432) & \\ 52 & 3s$^2$~3p$^5$~3d$^3$ & $^3$G$_{5}$ & 426~726.0 & 426~664.0 (62.0) & -- & 440~009.0 (--13~283) & \\ 53 & 3s$^2$ 3p$^6$ 3d 4p & $^1$P$_{1}$ & 443~447.0 & 443~499.0 ($-$52.0) & 443~447.0 (0) & 442~075.0 (1372) & \\ 93 & 3s$^2$~3p$^5$~3d$^3$ & $^3$H$_{5}$ & 472~557.0 & 470~937.0 (1620.0) & 464~034.0 (8523) & 484~884.0 (--12~327) & \\ 97 & 3s$^2$~3p$^5$~3d$^3$ & $^3$G$_{5}$ & 479~133.0 & 477~496.0 (1637.0) & 472~559.0 (6574) & 491~478.0 (--12~345) & \\ 98 & 3s$^2$~3p$^5$~3d$^3$ & $^3$G$_{4}$ & 479~926.0 & 478~478.0 (1448.0) & 472~903.0 (7023) & 492~013.0 (--12~087) & \\ 101 & 3s$^2$~3p$^5$~3d$^3$ & $^3$G$_{3}$ & 483~667.0 & 481~477.0 (2190.0) & 481~435.0 (2232) & 495~023.0 (--11~356) & \\ 104 & 3s$^2$~3p$^5$~3d$^3$ & $^1$G$_{4}$ & 496~454.0 & 496~425.0 (29.0) & 496~454.0 (0) & 509~993.0 (--13~539) & \\ 106 & 3s$^2$~3p$^5$~3d$^3$ & $^3$G$_{3}$ & 506~693.0 & 507~719.0 ($-$1026.0) & 510~086.0 (--3393) & 524~582.0 (--17~889) & \\ 108 & 3s$^2$~3p$^5$~3d$^3$ & $^3$G$_{4}$ & 510~709.0 & 510~971.0 ($-$262.0) & 510~158.0 (551) & 527~664.0 (--16~955) & \\ 110 & 3s$^2$~3p$^5$~3d$^3$ & $^3$G$_{5}$ & 512~415.0 & 512~497.0 ($-$82.0) & 514~133.0 (--1718) & 529~895.0 (--17~480) & \\ 115 & 3s$^2$~3p$^5$~3d$^3$ & $^1$D$_{2}$ & 538~290.0 & 538~356.0 ($-$66.0) & 538~290.0 (0) & 554~792.0 (--16~502) & \\ 116 & 3s$^2$~3p$^5$~3d$^3$ & $^1$H$_{5}$ & 538~588.0 & 538~571.0 (17.0) & -- & 556~628.0 (--18~040) & \\ 118 & 3s$^2$~3p$^5$~3d$^3$ & $^3$D$_{2}$ & 551~864.0 & 551~784.0 (80.0) & 548~274.0 (3590) & 569~214.0 (--17~350) & \\ 119 & 3s$^2$~3p$^5$~3d$^3$ & $^3$D$_{3}$ & 552~658.0 & 552~763.0 ($-$105.0) & 556~422.0 (--3764) & 570~068.0 (--17~410) & \\ 120 & 3s$^2$~3p$^5$~3d$^3$ & $^1$F$_{3}$ & 557~184.0 & 557~281.0 ($-$97.0) & 551~568.0 (5616) & 574~639.0 (--17~455) & \\ 121 & 3s$^2$~3p$^5$~3d$^3$ & $^1$D$_{2}$ & 561~477.0 & 560~937.0 (540.0) & 553~220.0 (8257) & 575~312.0 (--13~835) & \\ 130 & 3s$^2$~3p$^5$~3d$^3$ & $^3$P$_{1}$ & -- & 565~973.0 & 561~303.0 & 583~752.0 & \\ 131 & 3s$^2$~3p$^5$~3d$^3$ & $^3$F$_{2}$ & 564~425.0 & 564~784.0 ($-$359.0) & 564~425.0 (0) & 583~775.0 (--19~350) & \\ 133 & 3s$^2$~3p$^5$~3d$^3$ & $^3$F$_{3}$ & 566~256.0 & 566~261.0 ($-$5.0) & 566~256.0 (0) & 585~593.0 (--19~337) & \\ 134 & 3s$^2$~3p$^5$~3d$^3$ & $^3$P$_{2}$ & 570~327.0 & 569~856.0 (471.0) & 565~275.0 (5052) & 587~593.0 (--17~266) & \\ 135 & 3s$^2$~3p$^5$~3d$^3$ & $^3$F$_{4}$ & 568~118.0 & 568~202.0 ($-$84.0) & 568~118.0 (0) & 587~711.0 (--19~593) & \\ 146 & 3s$^2$~3p$^5$~3d$^3$ & $^1$P$_{1}$ & 598~638.0 & 598~666.0 ($-$28.0) & 598~638.0 (0) & 619~606.0 (--20~968) & \\ 147 & 3s$^2$~3p$^5$~3d$^3$ & $^3$D$_{2}$ & 603~757.0 & 603~603.0 (154.0) & 603~757.0 (0) & 624~084.0 (--20~327) & \\ 148 & 3s$^2$~3p$^5$~3d$^3$ & $^3$D$_{3}$ & 603~419.0 & 603~665.0 ($-$246.0) & 603~419.0 (0) & 624~266.0 (--20~847) & \\ 149 & 3s$^2$~3p$^5$~3d$^3$ & $^3$D$_{1}$ & 604~270.0 & 603~991.0 (279.0) & 604~270.0 (0) & 624~486.0 (--20~216) & \\ 150 & 3s$^2$~3p$^5$~3d$^3$ & $^1$G$_{4}$ & 613~483.0 & 613~387.0 (96.0) & 605~489.0 (7994) & 625~447.0 (--11~964) & \\ 151 & 3s$^2$~3p$^5$~3d$^3$ & $^3$S$_{1}$ & 623~699.0 & 623~696.0 (3.0) & 623~699.0 (0) & 640~135.0 (--16~436) & \\ 152 & 3s$^2$~3p$^5$~3d$^3$ & $^1$P$_{1}$ & 630~283.0 & 630~291.0 ($-$8.0) & 630~283.0 (0) & 647~721.0 (--17~438) & \\ 153 & 3s$^2$~3p$^5$~3d$^3$ & $^1$F$_{3}$ & 634~668 & 637~421.0 ($-$2753) & -- & 654~512.0 (--19~844) & \\ \noalign{\smallskip}\hline \end{tabular}} \smallskip Note: the first three columns indicate the indices (following the level ordering of WB08), the configuration and dominant $LSJ$. The following columns list the experimental level energies $E_{\rm exp}$ (cm$^{-1}$), those obtained from the benchmark calculation $E_{\rm Bench.}$, those from NIST v.3 and those of the WB08 scattering target $E_{\rm WB08}$. Values in parentheses indicate differences with the experimental energies. Only a selection of observed levels from the lower configurations, producing the EUV~lines discussed here, are presented. \end{table}