Table 1: Target levels of Fe X and their threshold energies (in Ryd).
Index Configuration Level NIST BD GRASP4 DGM GRASP8
1...... 3s23p5 2P $^\circ_{3/2}$ 0.0000 0.0000 0.0000 0.0000 0.0000
2...... 3s23p5 2P $^\circ_{1/2}$ 0.1429 0.1322 0.1430 0.1426 0.1426
3...... 3s3p6 2S1/2 2.6358 2.6329 2.6221 2.5927 2.6024
4...... 3s23p4 (3P)3d 4D5/2 3.5422 3.5564 3.5453 3.5448 3.5473
5...... 3s23p4 (3P)3d 4D7/2 3.5422 3.5569 3.5442 3.5446 3.5468
6...... 3s23p4 (3P)3d 4D3/2 3.5544 3.5661 3.5571 3.5545 3.5587
7...... 3s23p4 (3P)3d 4D1/2 3.5681 3.5784 3.5712 3.5682 3.5724
8...... 3s23p4 (3P)3d 4F9/2 3.8059 3.8263 3.8191 3.8077 3.8407
9...... 3s23p4 (1D)3d 2P1/2 ...... 3.8904 3.8882 3.7636 3.8608
10...... 3s23p4 (3P)3d 4F7/2 3.8528 3.8693 3.8672 3.8549 3.8876
11...... 3s23p4 (3P)3d 4F5/2 3.8890 3.9005 3.9019 3.8925 3.9220
12...... 3s23p4 (3P)3d 4F3/2 3.9029 3.9150 3.9178 3.9373 3.9345
13...... 3s23p4 (1D)3d 2P3/2 3.9360 3.9585 3.9606 3.8949 3.9375
14...... 3s23p4 (1D)3d 2D3/2 3.9605 4.0056 4.0073 3.9710 3.9942
15...... 3s23p4 (3P)3d 4P1/2 3.9622 3.9978 4.0003 3.9833 3.9992
16...... 3s23p4 (3P)3d 4P3/2 ...... 4.0450 4.0497 4.1171 4.0435
17...... 3s23p4 (3P)3d 4P5/2 4.0265 4.0652 4.0683 4.0303 4.0615
18...... 3s23p4 (3P)3d 2F7/2 4.0172 4.1517 4.0671 4.0274 4.0716
19...... 3s23p4 (1D)3d 2D5/2 ...... 4.0871 4.0939 4.0532 4.0836
20...... 3s23p4 (1D)3d 2G9/2 4.1075 4.1440 4.1501 4.1116 4.1612
21...... 3s23p4 (1D)3d 2G7/2 4.1106 4.0649 4.1603 4.1249 4.1660
22...... 3s23p4 (3P)3d 2F5/2 4.1256 4.1866 4.1966 4.1513 4.1935
23...... 3s23p4 (1D)3d 2F5/2 ...... 4.4638 4.4796 4.5386 4.4664
24...... 3s23p4 (1D)3d 2F7/2 4.4286 4.4981 4.5147 4.5689 4.5020
25...... 3s23p4 (1S)3d 2D3/2 4.6639 4.7849 4.8102 4.7120 4.7243
26...... 3s23p4 (1S)3d 2D5/2 ...... 4.8234 4.8497 4.9266 4.7618
27...... 3s23p4 (1D)3d 2S1/2 4.9380 5.2766 5.3189 4.9886 5.0228
28...... 3s23p4 (3P)3d 2P3/2 5.1414 5.3219 5.3605 5.2806 5.2727
29...... 3s23p4 (3P)3d 2P1/2 5.1941 5.3762 5.4141 5.3628 5.3243
30...... 3s23p4 (3P)3d 2D5/2 5.2211 5.4723 5.5127 5.3950 5.3428
31...... 3s23p4 (3P)3d 2D3/2 5.3422 5.5857 5.6339 5.5132 5.4633
32...... 3s3p5(3P)3d 4P $^\circ_{1/2}$ ...... 6.4777 6.4698 6.1094 6.2252
33...... 3s3p5(3P)3d 4P $^\circ_{3/2}$ ...... 6.5033 6.4953 6.1323 6.2485
34...... 3s3p5(3P)3d 4P $^\circ_{5/2}$ ...... 6.5485 6.5411 6.1760 6.2905
35...... 3s3p5(3P)3d 4F $^\circ_{9/2}$ 6.3484 6.6584 6.6513 6.3568 6.5516
36...... 3s3p5(3P)3d 4F $^\circ_{7/2}$ 6.3742 6.6857 6.6817 6.3834 6.5771
37...... 3s3p5(3P)3d 4F $^\circ_{5/2}$ 6.4024 6.7131 6.7121 6.4115 6.6044
38...... 3s3p5(3P)3d 4F $^\circ_{3/2}$ 6.4283 6.7369 6.7385 6.4366 6.6293
39...... 3s3p5(3P)3d 4D $^\circ_{7/2}$ ...... 6.9896 6.9929 6.7351 6.8504
40...... 3s3p5(3P)3d 4D $^\circ_{1/2}$ ...... 7.0050 7.0142 6.7480 6.8630
41...... 3s3p5(3P)3d 4D $^\circ_{5/2}$ ...... 7.0058 7.0116 6.7482 6.8662
42...... 3s3p5(3P)3d 4D $^\circ_{3/2}$ ...... 7.0080 7.0160 6.7507 6.8678
43...... 3s3p5(3P)3d 2F $^\circ_{7/2}$ ...... 7.2283 7.2411 6.8396 6.9268
44...... 3s3p5(3P)3d 2F $^\circ_{5/2}$ ...... 7.2554 7.3246 6.8890 6.9859
45...... 3s3p5(3P)3d 2D $^\circ_{3/2}$ ...... 7.2845 7.2975 6.9375 7.0510
46...... 3s3p5(3P)3d 2D $^\circ_{5/2}$ ...... 7.3078 7.2679 6.9562 7.0664
47...... 3s3p5(1P)3d 2P $^\circ_{1/2}$ ...... 7.5371 7.5536 7.0603 7.1458
48...... 3s3p5(1P)3d 2P $^\circ_{3/2}$ ...... 7.6084 7.6294 7.1273 7.2206
49...... 3s3p5(1P)3d 2F $^\circ_{5/2}$ ...... 7.9368 7.9637 7.3210 7.4237
50...... 3s3p5(1P)3d 2F $^\circ_{7/2}$ ...... 7.9483 7.9728 7.3556 7.4626
51...... 3s3p5(1P)3d 2D $^\circ_{3/2}$ ...... 8.1956 8.2299 7.5919 7.6777
52...... 3s3p5(1P)3d 2D $^\circ_{5/2}$ ...... 8.2031 8.2350 7.6056 7.6931
53...... 3s3p5(3P)3d 2P $^\circ_{1/2}$ ...... 8.8872 8.9439 7.9995 8.2058
54...... 3s3p5(3P)3d 2P $^\circ_{3/2}$ ...... 8.8768 8.9304 8.0054 8.2119
NIST (http://www.physics.nist/gov/PhysRefData), BD: Bhatia & Doschek (1995), DGM: Deb et al. (2002), GRASP4: present results from 4 configurations and 54 levels, GRASP8: present results from 8 configurations and 669 levels.


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