Iron (Fe)
Energy Levels of Neutral Iron ( Fe I )
Configuration
Term
J
Level(cm
-1
)
Ref.
3
d
6
4
s
2
a
5
D
4
0.000
NJLT94
3
415.933
NJLT94
2
704.007
NJLT94
1
888.132
NJLT94
0
978.074
NJLT94
3
d
7
(
4
F)4
s
a
5
F
5
6928.268
NJLT94
4
7376.764
NJLT94
3
7728.059
NJLT94
2
7985.784
NJLT94
1
8154.713
NJLT94
3
d
7
(
4
F)4
s
a
3
F
4
11976.238
NJLT94
3
12560.933
NJLT94
2
12968.553
NJLT94
3
d
7
(
4
P)4
s
a
5
P
3
17550.180
NJLT94
2
17726.987
NJLT94
1
17927.381
NJLT94
3
d
6
4
s
2
a
3
P
2
18378.185
NJLT94
1
19552.477
NJLT94
0
20037.815
NJLT94
3
d
6
(
5
D)4
s
4
p
(
3
P)
z
7
D°
5
19350.892
NJLT94
4
19562.440
NJLT94
3
19757.033
NJLT94
2
19912.494
NJLT94
1
20019.634
NJLT94
3
d
6
4
s
2
a
3
H
6
19390.167
NJLT94
5
19621.005
NJLT94
4
19788.250
NJLT94
3
d
6
4
s
2
b
3
F
4
20641.109
NJLT94
3
20874.481
NJLT94
2
21038.986
NJLT94
3
d
7
(
2
G)4
s
a
3
G
5
21715.731
NJLT94
4
21999.129
NJLT94
3
22249.428
NJLT94
3
d
6
(
5
D)4
s
4
p
(
3
P)
z
7
F°
6
22650.414
NJLT94
5
22845.867
NJLT94
4
22996.672
NJLT94
3
23110.937
NJLT94
2
23192.498
NJLT94
1
23244.836
NJLT94
0
23270.382
NJLT94
3
d
7
(
4
P)4
s
b
3
P
2
22838.321
NJLT94
1
22946.814
NJLT94
0
23051.748
NJLT94
3
d
6
(
5
D)4
s
4
p
(
3
P)
z
7
P°
4
23711.454
NJLT94
3
24180.860
NJLT94
2
24506.915
NJLT94
3
d
6
4
s
2
b
3
G
5
23783.617
NJLT94
4
24118.817
NJLT94
3
24338.765
NJLT94
3
d
7
(
2
P)4
s
c
3
P
2
24335.764
NJLT94
1
24772.016
NJLT94
0
25091.597
NJLT94
3
d
7
(
2
G)4
s
a
1
G
4
24574.653
NJLT94
3
d
6
(
5
D)4
s
4
p
(
3
P)
z
5
D°
4
25899.987
NJLT94
3
26140.177
NJLT94
2
26339.694
NJLT94
1
26479.379
NJLT94
0
26550.477
NJLT94
3
d
7
(
2
H)4
s
b
3
H
6
26105.906
NJLT94
5
26351.038
NJLT94
4
26627.607
NJLT94
3
d
7
(
a
2
D)4
s
a
3
D
3
26224.967
NJLT94
2
26623.733
NJLT94
1
26406.463
NJLT94
3
d
6
(
5
D)4
s
4
p
(
3
P)
z
5
F°
5
26874.548
NJLT94
4
27166.818
NJLT94
3
27394.689
NJLT94
2
27559.581
NJLT94
1
27666.346
NJLT94
3
d
7
(
2
P)4
s
a
1
P
1
27543.001
NJLT94
3
d
7
(
a
2
D)4
s
a
1
D
2
28604.611
NJLT94
3
d
7
(
2
H)4
s
a
1
H
5
28819.952
NJLT94
3
d
6
(
5
D)4
s
4
p
(
3
P)
z
5
P°
3
29056.322
NJLT94
2
29469.022
NJLT94
1
29732.734
NJLT94
3
d
6
4
s
2
a
1
I
6
29313.006
NJLT94
3
d
6
4
s
2
b
3
D
3
29371.810
NJLT94
2
29356.742
NJLT94
1
29320.024
NJLT94
3
d
6
4
s
2
b
1
G
4
29798.934
NJLT94
3
d
6
(
5
D)4
s
4
p
(
3
P)
z
3
F°
4
31307.243
NJLT94
3
31805.069
NJLT94
2
32133.989
NJLT94
3
d
6
(
5
D)4
s
4
p
(
3
P)
z
3
D°
3
31322.611
NJLT94
2
31686.349
NJLT94
1
31937.323
NJLT94
3
d
8
c
3
F
4
32873.630
NJLT94
3
33412.715
NJLT94
2
33765.304
NJLT94
3
d
7
(
4
F)4
p
y
5
D°
4
33095.939
NJLT94
3
33507.121
NJLT94
2
33801.570
NJLT94
1
34017.101
NJLT94
0
34121.601
NJLT94
3
d
7
(
4
F)4
p
y
5
F°
5
33695.395
NJLT94
4
34039.514
NJLT94
3
34328.750
NJLT94
2
34547.209
NJLT94
1
34692.146
NJLT94
3
d
6
(
5
D)4
s
4
p
(
3
P)
z
3
P°
2
33946.931
NJLT94
1
34362.871
NJLT94
0
34555.595
NJLT94
3
d
6
4
s
2
b
1
D
2
34636.790
NJLT94
3
d
7
(
4
F)4
p
z
5
G°
6
34843.955
NJLT94
5
34782.419
NJLT94
4
35257.322
NJLT94
3
35611.623
NJLT94
2
35856.400
NJLT94
3
d
7
(
4
F)4
p
z
3
G°
5
35379.206
NJLT94
4
35767.562
NJLT94
3
36079.370
NJLT94
3
d
7
(
4
F)4
p
y
3
F°
4
36686.174
NJLT94
3
37162.744
NJLT94
2
37521.158
NJLT94
3
d
6
(
5
D)4
s
4
p
(
1
P)
y
5
P°
3
36766.964
NJLT94
2
37157.564
NJLT94
1
37409.552
NJLT94
3
d
7
(
2
F)4
s
d
3
F
2
36940.588
NJLT94
3
36975.586
NJLT94
4
37045.932
NJLT94
3
d
7
(
4
F)4
p
y
3
D°
3
38175.352
NJLT94
2
38678.036
NJLT94
1
38995.733
NJLT94
3
d
6
(
5
D)4
s
4
p
(
1
P)
x
5
D°
4
39625.801
NJLT94
3
39969.850
NJLT94
2
40231.333
NJLT94
1
40404.515
NJLT94
0
40491.281
NJLT94
3
d
5
(
6
S)4
s
2
4
p
y
7
P°
4
40421.935
NJLT94
3
40207.088
NJLT94
2
40052.032
NJLT94
3
d
6
(
5
D)4
s
4
p
(
1
P)
x
5
F°
5
40257.311
NJLT94
4
40594.429
NJLT94
3
40842.151
NJLT94
2
41018.048
NJLT94
1
41130.596
NJLT94
3
d
8
c
3
P
2
40871.409
NJLT94
1
41178.409
NJLT94
0
41234.502
NJLT94
3
d
6
(
3
P)4
s
4
p
(
3
P)
z
5
S°
2
40894.987
NJLT94
3
d
6
(
3
P)4
s
4
p
(
3
P)
x
5
P°
3
42532.738
NJLT94
2
42859.775
NJLT94
1
43079.020
NJLT94
3
d
6
(
3
H)4
s
4
p
(
3
P)
y
5
G°
6
42784.349
NJLT94
5
42911.914
NJLT94
4
43022.982
NJLT94
3
43137.484
NJLT94
2
43210.022
NJLT94
Fe II (
6
D
9
/
2
)
Limit
63737
SC85