Table 1: Energy levels (in Ryd) and mixing coefficients of Fe  XVI.
Index Configuration Level NIST GRASPa GRASPb FACc Mixing coefficientsd
1 2p63s 2S 1/2 0.00000 0.00000 0.00000 0.00000 0.999( 1)
2 2p63p 2P$^{\circ}$1/2 2.52598 2.56393 2.56618 2.54757 0.999( 2)
3 2p63p 2P$^{\circ}$3/2 2.71688 2.75844 2.75486 2.73706 0.999( 3)
4 2p63d 2D 3/2 6.15562 6.20499 6.19591 6.16949 0.999( 4)
5 2p63d 2D 5/2 6.18209 6.23332 6.22081 6.19510 0.999( 5)
6 2p53s2 2P$^{\circ}$3/2 52.60745 52.36353 52.31794 52.41746 0.985( 6)
7 2p53s2 2P$^{\circ}$1/2 53.51871 53.30895 53.24028 53.33762 0.985( 7)
8 2p53s3p 4S 3/2   54.13058 54.08374 54.17709 -0.886( 8), 0.431( 14)
9 2p53s3p 4D 5/2 54.51199 54.37708 54.32940 54.42538 0.828( 9), -0.416( 13)
10 2p53s3p 4D 7/2   54.43349 54.38145 54.47626 0.998( 10)
11 2p53s(1P)3p 2D 3/2 54.79442 54.43554 54.38938 54.48851 0.676( 17), 0.536( 11)
12 2p53s(1P)3p 2P 1/2 54.68514 54.56418 54.52045 54.61812 0.582( 12), -0.541( 16), 0.478( 18)
13 2p53s3p 4P 5/2   54.67382 54.62489 54.72388 0.810( 13), 0.481( 21)
14 2p53s3p 4P 3/2 55.55084 54.67609 54.62869 54.72922 0.543( 11), 0.507( 14), 0.431( 22)
15 2p53s(1P)3p 2S 1/2 55.05876 54.89407 54.84442 54.93897 0.646( 15), -0.537( 18)
16 2p53s3p 4D 1/2 55.35947 55.28057 55.21306 55.30909 0.797( 16), 0.453( 12)
17 2p53s3p 4D 3/2 55.48705 55.37720 55.30739 55.40431 0.696( 17), -0.430( 11)
18 2p53s3p 4P 1/2 55.48705 55.39547 55.33684 55.42765 0.648( 18), 0.545( 15)
19 2p53s(3P)3p 2D 5/2 54.79442 55.49867 55.44467 55.52949 -0.908( 19)
20 2p53s(3P)3p 2P 3/2 55.85156 55.50353 55.43583 55.52862 0.663( 14), -0.521( 20)
21 2p53s(1P)3p 2D 5/2 55.67842 55.57474 55.50469 55.60006 -0.788( 21), 0.464( 9),
22 2p53s(1P)3p 2P 3/2   55.63602 55.58697 55.67262 -0.642( 22), 0.561( 20), -0.418( 24)
23 2p53s(3P)3p 2P 1/2   56.31892 56.25643 56.34105 0.737( 23), -0.420( 12), -0.419( 15)
24 2p53s(3P)3p 2D 3/2 56.65347 56.48207 56.40948 56.48980 0.761( 24), -0.412( 11)
25 2p53s(3P)3p 2S 1/2 57.10911 57.04715 56.99370 57.07898 0.894( 25)
26 2p53p2 4P$^{\circ}$3/2   57.11374 57.06488 57.15728 -0.579( 26), 0.471( 30)
27 2p53p2(1D) 2P$^{\circ}$1/2   57.11721 57.06704 57.16091 0.708( 27), -0.447( 63)
28 2p53p2 4P$^{\circ}$5/2   57.18875 57.13944 57.22878 0.861( 28), -0.457( 35)
29 2p53p2 2F$^{\circ}$7/2   57.20144 57.14806 57.24572 -0.828( 29)
30 2p53p2(1D) 2P$^{\circ}$3/2   57.27558 57.22768 57.32069 -0.517( 26), -0.415( 30)
31 2p53p2(1D) 2D$^{\circ}$5/2   57.40167 57.35118 57.44791 -0.624( 31), 0.442( 42)
32 2p53p2(3P) 2D$^{\circ}$3/2   57.43847 57.39127 57.48571 0.783( 32), 0.420( 43)
33 2p53p2 4P$^{\circ}$1/2   57.45866 57.40547 57.49659 -0.765( 33), 0.490( 45)
34 2p53p2 4D$^{\circ}$7/2   57.47691 57.42105 57.51299 0.944( 34)
35 2p53p2 4D$^{\circ}$5/2   57.49089 57.43729 57.53061 0.591( 51), 0.555( 35), 0.404( 28)
36 2p53p2 4D$^{\circ}$1/2   57.93073 57.87458 57.96637 0.788( 36), -0.440( 45)
37 2p53p2(1D) 2D$^{\circ}$3/2   57.97229 57.91773 58.01218 0.617( 48), -0.465( 37)
38 2p53s3d 4P$^{\circ}$1/2   57.98889 57.93888 58.03972 -0.979( 38)
39 2p53s3d 4P$^{\circ}$3/2   58.05947 58.00538 58.10584 0.938( 39)
40 2p53s3d 4F$^{\circ}$9/2   58.15573 58.09555 58.19396 1.000( 40)
41 2p53s3d 4P$^{\circ}$5/2 58.25730 58.17918 58.11794 58.22565 0.799( 41), -0.449( 59)
42 2p53p2 2F$^{\circ}$5/2   58.19900 58.12751 58.21310 -0.641( 42), -0.442( 31)
43 2p53p2 4D$^{\circ}$3/2   58.21215 58.14156 58.23244 0.655( 43), -0.410( 37)
44 2p53s3d 4F$^{\circ}$7/2   58.21941 58.16102 58.25588 0.885( 44)
45 2p53p2 2S$^{\circ}$1/2   58.28129 58.21189 58.30146 0.712( 45), 0.538( 33), 0.447( 36)
46 2p53s3d 4F$^{\circ}$5/2 58.37577 58.30062 58.24386 58.33759 0.747( 46), 0.431( 50)
47 2p53s(1P)3d 2D$^{\circ}$3/2   58.40180 58.34352 58.43276 -0.576( 58), 0.444( 47)
48 2p53p2 4S$^{\circ}$3/2   58.43197 58.36742 58.45592 0.479( 48), 0.443( 26), 0.437( 52)
49 2p53s3d 4D$^{\circ}$7/2 58.52157 58.45282 58.39564 58.48497 0.815( 49), 0.497( 61)
50 2p53s(1P)3d 2F$^{\circ}$5/2 58.54891 58.48128 58.42242 58.51233 0.570( 50), 0.482( 59)
51 2p53p2(3P) 2D$^{\circ}$5/2   58.51272 58.43827 58.53265 -0.673( 51), 0.506( 35)
52 2p53p2(1S) 2P$^{\circ}$3/2   58.51295 58.45493 58.54002 0.694( 52)
53 2p53s(1P)3d 2P$^{\circ}$1/2 58.53068 58.53541 58.48029 58.57178 0.622( 53), -0.589( 55)
54 2p53s(1P)3d 2P$^{\circ}$3/2 58.64915 58.71984 58.66234 58.74794 0.550( 54), -0.548( 56)
55 2p53s3d 4D$^{\circ}$1/2   58.82057 58.76090 58.83807 0.646( 55), 0.541( 63), -0.420( 67)
56 2p53s3d 4D$^{\circ}$3/2 58.98632 59.10868 59.04324 59.12486 -0.521( 56), -0.405( 65)
57 2p53s(3P)3d 2F$^{\circ}$7/2 58.73116 59.19215 59.13497 59.21341 0.772( 57), 0.489( 29), -0.402( 61)
58 2p53s3d 4F$^{\circ}$3/2 59.25058 59.21520 59.14077 59.23393 0.700( 58), 0.568( 47)
59 2p53s3d 4D$^{\circ}$5/2 59.25058 59.23119 59.15303 59.24131 0.654( 59), 0.535( 46)
60 2p53s(3P)3d 2D$^{\circ}$5/2 58.90430 59.27727 59.20474 59.28913 -0.653( 60)
61 2p53s(1P)3d 2F$^{\circ}$7/2 59.38727 59.33240 59.25137 59.33982 -0.666( 61), 0.492( 49), 0.461( 44)
62 2p53s(1P)3d 2D$^{\circ}$5/2 59.37816 59.40018 59.34082 59.42136 0.677( 62)
63 2p53p2(3P) 2P$^{\circ}$1/2   59.40747 59.34593 59.43010 0.527( 53), -0.482( 27)
64 2p53p2(1S) 2P$^{\circ}$1/2   59.54384 59.47971 59.55638 0.881( 64),
65 2p53p2(3P) 2P$^{\circ}$3/2   59.61159 59.55298 59.63031 0.601( 65), 0.462( 30)
66 2p53s(3P)3d 2D$^{\circ}$3/2   59.75825 59.68822 59.75204 -0.506( 76), 0.506( 66), -0.493( 54)
67 2p53s(3P)3d 2P$^{\circ}$1/2 59.90670 60.02441 59.95160 60.00957 -0.802( 67), -0.429( 53)
68 2p53p3d(3S) 4D 1/2   60.09502 60.04611 60.14409 -0.730( 68), -0.569(120)
69 2p53p3d(3S) 4D 3/2   60.17116 60.11829 60.21617 0.740( 69), 0.517(119)
70 2p53s(3P)3d 2F$^{\circ}$5/2 59.74267 60.20698 60.12842 60.20253 0.619( 70), 0.407( 60)
71 2p53p3d(3S) 4D 5/2   60.29006 60.23238 60.32960 0.759( 71), 0.410( 99)
72 2p53p3d(3D) 4G 7/2   60.41131 60.35233 60.44618 0.616( 72), 0.429( 74), 0.403( 82)
73 2p53p3d 4G 9/2   60.43500 60.37302 60.47084 0.884( 73)
74 2p53p3d(3S) 4D 7/2   60.44591 60.38502 60.50865 -0.681( 74)
75 2p53p3d 4G 11/2   60.47640 60.41011 60.47567 1.000( 75)
76 2p53s(3P)3d 2P$^{\circ}$3/2 60.09806 60.47817 60.40230 60.47991 0.667( 76), 0.408( 66), 0.402( 30)
77 2p53p3d(3D) 2D 5/2   60.50269 60.44777 60.53828 -0.484(113)
78 2p53p3d(3D) 2D 3/2   60.54189 60.48675 60.58196 -0.451(112), 0.428( 78)
79 2p53p3d(3D) 2F 7/2   60.60902 60.54820 60.64577 0.680( 79), 0.473(108)
80 2p53p3d(1P) 2F 5/2   60.61475 60.55605 60.64870 -0.559(101), 0.426( 80)
81 2p53p3d(1P) 2P 1/2   60.65721 60.60183 60.70206 -0.540( 97), 0.509( 81), 0.480(126)
82 2p53p3d(1D) 2G 7/2   60.72887 60.67077 60.76248 0.531( 82)
83 2p53p3d(3D) 4P 1/2   60.78928 60.73533 60.83237 0.762( 83), 0.531(115)
84 2p53p3d(3D) 4P 3/2   60.82790 60.77171 60.86720 0.744( 84), -0.550( 86)
85 2p53p3d(3P) 4F 9/2   60.82979 60.76830 60.85897 0.615( 85), 0.525(109), 0.500( 91)
86 2p53p3d(3D) 4S 3/2   60.87238 60.81615 60.90864 0.609( 86)
87 2p53p3d(3P) 4D 7/2   60.88786 60.82874 60.92297 0.693( 87), -0.464( 94)
88 2p53p3d(3D) 4F 5/2   60.91229 60.85344 60.94462 -0.451( 89), 0.406(114), 0.406( 99)
89 2p53p3d(3D) 4P 5/2   60.91779 60.85914 60.94992 0.742( 89)
90 2p53p3d(3D) 4F 3/2   60.97310 60.91494 60.99975 -0.561( 90)
91 2p53p3d(3D) 4F9/2   61.01944 60.95573 61.04967 0.795( 91), -0.591( 85)
92 2p53p3d(1P) 2P3/2   61.02141 60.96448 61.05502 0.443( 92)
93 2p53p3d(1P) 2D5/2   61.07479 61.01801 61.10393 -0.506(114), 0.433( 93),
94 2p53p3d(3D) 4F7/2   61.09930 61.03764 61.12961 0.513( 94), -0.511(106), 0.429(121)
95 2p53p3d(1D) 2F5/2   61.12272 61.06369 61.15376 0.610( 95), -0.458(102)
96 2p53p3d(3D) 4D7/2   61.14633 61.08498 61.16957 0.826( 96)
97 2p53p3d(3P) 2P1/2   61.16838 61.11025 61.19611 0.525( 68), -0.486(120)
98 2p53p3d(1D) 2D3/2   61.23950 61.18234 61.26807 0.595( 98), -0.507(119)
99 2p53p3d(3P) 4D5/2   61.26175 61.20205 61.28725 -0.509( 99), 0.455(122)
100 2p53p3d(1P) 2D3/2   61.31016 61.24893 61.33183 -0.544(112), 0.484(100)
101 2p53p3d(3D) 4G5/2   61.32200 61.24585 61.33821 0.606(101), 0.502(107), 0.410( 80)
102 2p53p3d(3P) 4F5/2   61.41068 61.34445 61.43000 0.451( 80)
103 2p53p3d(3D) 4D1/2   61.41192 61.35321 61.42990 -0.573(103), 0.501(126)
104 2p53p3d(3P) 4F3/2   61.47289 61.40208 61.49645 0.461(104), 0.411(100)
105 2p53p3d(1D) 2S1/2   61.48154 61.42443 61.50666 -0.646(105), -0.628(115)
106 2p53p3d(3P) 4F7/2   61.50415 61.42221 61.51326 0.605( 72)
107 2p53p3d(3D) 2F5/2   61.55458 61.47347 61.56445 -0.490(107), 0.466(125)
108 2p53p3d(1P) 2F7/2   61.64063 61.56056 61.64670 0.499( 87), -0.418(108), 0.414(106)
109 2p53p3d(1D) 2G9/2   61.66765 61.58175 61.66985 -0.662(109), 0.457( 85), 0.445( 73)
110 2p53p3d(3D) 4D3/2   61.68685 61.61493 61.69331 0.604(110)
111 2p53p3d(3D) 2G9/2   61.75682 61.69334 61.77370 0.919(111)
112 2p53p3d(3S) 2D3/2   61.79240 61.72111 61.81103 0.588( 90), -0.423(104)
113 2p53p3d(3S) 2D5/2   61.86910 61.80037 61.88206 0.494(113), 0.439(118)
114 2p53p3d(3D) 4D5/2   61.94324 61.86516 61.94608 0.469(114), 0.439( 93)
115 2p53p3d(3P) 4P1/2   61.95561 61.88979 61.96959 0.469(132), -0.466( 83), 0.462(115)
116 2p53p3d(3P) 2F7/2   61.96033 61.89980 61.97643 -0.520(129), 0.496(116), 0.444( 79)
117 2p53p3d(3P) 4P3/2   61.99275 61.91457 61.99405 0.470( 84), 0.456(123)
118 2p53p3d(3P) 4P5/2   62.01950 61.94888 62.02740 0.494(118), -0.423( 93)
119 2p53p3d(3P) 4D3/2   62.05674 61.97802 62.06391 0.467(119)
120 2p53p3d(3P) 4D1/2   62.05790 61.97998 62.06754 -0.610(120), -0.444( 81)
121 2p53p3d(1D) 2F7/2   62.07990 61.99687 62.08230 -0.559(121)
122 2p53p3d(1D) 2D5/2   62.09892 62.02163 62.10258 0.499(130)
123 2p53p3d(3P) 2P3/2   62.11304 62.05018 62.11879 -0.492(123), -0.425( 78), -0.418(127)
124 2p53p3d(3P) 2D3/2   62.34616 62.27680 62.32272 0.589(124), 0.457( 78)
125 2p53p3d(3P) 2F5/2   62.35587 62.28342 62.34591 -0.485(125), 0.446(122)
126 2p53p3d(1D) 2P1/2   62.39653 62.31859 62.38120 -0.549( 97), -0.463(126)
127 2p53p3d(1D) 2P3/2   62.58476 62.50435 62.55824 0.492(127), 0.467(131)
128 2p53p3d(3D) 2P1/2   62.78038 62.70084 62.74799 -0.577(128), 0.520(132)
129 2p53p3d(3D) 2G7/2   62.80742 62.72376 62.79937 0.656(129), 0.482(116)
130 2p53p3d(3P) 2D5/2   62.90893 62.83399 62.88355 0.533(130), 0.479(134)
131 2p53p3d(3D) 2P3/2   62.93802 62.86270 62.92609 0.526(124), -0.494(131)
132 2p53p3d(3D) 2S1/2   63.11751 63.03638 63.09278 0.630(132), 0.574(128)
133 2p53p3d(1S) 2D3/2   63.27350 63.21048 63.29593 0.875(133)
134 2p53p3d(1S) 2D5/2   63.34064 63.27358 63.37006 0.850(134)
NIST: http://physics.nist.gov/PhysRefData.
a energies without Breit and QED corrections;
b energies with Breit and QED corrections;
c energies from the Flexible Atomic Code of Gu (2003);
d mixing coefficient of the level (in bracket).

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