Energy Levels of Neutral Iron ( Fe I )
Configuration Term J Level(cm-1) Ref.
3d64s2 a 5D 4 0.000 NJLT94
3d64s2 a 5D 3 415.933 NJLT94
3d64s2 a 5D 2 704.007 NJLT94
3d64s2 a 5D 1 888.132 NJLT94
3d64s2 a 5D 0 978.074 NJLT94
3d7(4F)4s a 5F 5 6928.268 NJLT94
3d7(4F)4s a 5F 4 7376.764 NJLT94
3d7(4F)4s a 5F 3 7728.059 NJLT94
3d7(4F)4s a 5F 2 7985.784 NJLT94
3d7(4F)4s a 5F 1 8154.713 NJLT94
3d7(4F)4s a 3F 4 11976.238 NJLT94
3d7(4F)4s a 3F 3 12560.933 NJLT94
3d7(4F)4s a 3F 2 12968.553 NJLT94
3d7(4P)4s a 5P 3 17550.180 NJLT94
3d7(4P)4s a 5P 2 17726.987 NJLT94
3d7(4P)4s a 5P 1 17927.381 NJLT94
3d64s2 a 3P 2 18378.185 NJLT94
3d64s2 a 3P 1 19552.477 NJLT94
3d64s2 a 3P 0 20037.815 NJLT94
3d6(5D)4s4p(3P) z 7D° 5 19350.892 NJLT94
3d6(5D)4s4p(3P) z 7D° 4 19562.440 NJLT94
3d6(5D)4s4p(3P) z 7D° 3 19757.033 NJLT94
3d6(5D)4s4p(3P) z 7D° 2 19912.494 NJLT94
3d6(5D)4s4p(3P) z 7D° 1 20019.634 NJLT94
3d64s2 a 3H 6 19390.167 NJLT94
3d64s2 a 3H 5 19621.005 NJLT94
3d64s2 a 3H 4 19788.250 NJLT94
3d64s2 b 3F 4 20641.109 NJLT94
3d64s2 b 3F 3 20874.481 NJLT94
3d64s2 b 3F 2 21038.986 NJLT94
3d7(2G)4s a 3G 5 21715.731 NJLT94
3d7(2G)4s a 3G 4 21999.129 NJLT94
3d7(2G)4s a 3G 3 22249.428 NJLT94
3d6(5D)4s4p(3P) z 7F° 6 22650.414 NJLT94
3d6(5D)4s4p(3P) z 7F° 5 22845.867 NJLT94
3d6(5D)4s4p(3P) z 7F° 4 22996.672 NJLT94
3d6(5D)4s4p(3P) z 7F° 3 23110.937 NJLT94
3d6(5D)4s4p(3P) z 7F° 2 23192.498 NJLT94
3d6(5D)4s4p(3P) z 7F° 1 23244.836 NJLT94
3d6(5D)4s4p(3P) z 7F° 0 23270.382 NJLT94
3d7(4P)4s b 3P 2 22838.321 NJLT94
3d7(4P)4s b 3P 1 22946.814 NJLT94
3d7(4P)4s b 3P 0 23051.748 NJLT94
3d6(5D)4s4p(3P) z 7P° 4 23711.454 NJLT94
3d6(5D)4s4p(3P) z 7P° 3 24180.860 NJLT94
3d6(5D)4s4p(3P) z 7P° 2 24506.915 NJLT94
3d64s2 b 3G 5 23783.617 NJLT94
3d64s2 b 3G 4 24118.817 NJLT94
3d64s2 b 3G 3 24338.765 NJLT94
3d7(2P)4s c 3P 2 24335.764 NJLT94
3d7(2P)4s c 3P 1 24772.016 NJLT94
3d7(2P)4s c 3P 0 25091.597 NJLT94
3d7(2G)4s a 1G 4 24574.653 NJLT94
3d6(5D)4s4p(3P) z 5D° 4 25899.987 NJLT94
3d6(5D)4s4p(3P) z 5D° 3 26140.177 NJLT94
3d6(5D)4s4p(3P) z 5D° 2 26339.694 NJLT94
3d6(5D)4s4p(3P) z 5D° 1 26479.379 NJLT94
3d6(5D)4s4p(3P) z 5D° 0 26550.477 NJLT94
3d7(2H)4s b 3H 6 26105.906 NJLT94
5 26351.038 NJLT94
4 26627.607 NJLT94
3d7(a2D)4s a 3D 3 26224.967 NJLT94
2 26623.733 NJLT94
1 26406.463 NJLT94
3d6(5D)4s4p(3P) z 5F° 5 26874.548 NJLT94
3d6(5D)4s4p(3P) z 5F° 4 27166.818 NJLT94
3d6(5D)4s4p(3P) z 5F° 3 27394.689 NJLT94
3d6(5D)4s4p(3P) z 5F° 2 27559.581 NJLT94
3d6(5D)4s4p(3P) z 5F° 1 27666.346 NJLT94
3d7(2P)4s a 1P 1 27543.001 NJLT94
3d7(a2D)4s a 1D 2 28604.611 NJLT94
3d7(2H)4s a 1H 5 28819.952 NJLT94
3d6(5D)4s4p(3P) z 5P° 3 29056.322 NJLT94
3d6(5D)4s4p(3P) z 5P° 2 29469.022 NJLT94
3d6(5D)4s4p(3P) z 5P° 1 29732.734 NJLT94
3d64s2 a 1I 6 29313.006 NJLT94
3d64s2 b 3D 3 29371.810 NJLT94
3d64s2 b 3D 2 29356.742 NJLT94
3d64s2 b 3D 1 29320.024 NJLT94
3d64s2 b 1G 4 29798.934 NJLT94
3d6(5D)4s4p(3P) z 3F° 4 31307.243 NJLT94
3d6(5D)4s4p(3P) z 3F° 3 31805.069 NJLT94
3d6(5D)4s4p(3P) z 3F° 2 32133.989 NJLT94
3d6(5D)4s4p(3P) z 3D° 3 31322.611 NJLT94
3d6(5D)4s4p(3P) z 3D° 2 31686.349 NJLT94
3d6(5D)4s4p(3P) z 3D° 1 31937.323 NJLT94
3d8 c 3F 4 32873.630 NJLT94
3d8 c 3F 3 33412.715 NJLT94
3d8 c 3F 2 33765.304 NJLT94
3d7(4F)4p y 5D° 4 33095.939 NJLT94
3d7(4F)4p y 5D° 3 33507.121 NJLT94
3d7(4F)4p y 5D° 2 33801.570 NJLT94
3d7(4F)4p y 5D° 1 34017.101 NJLT94
3d7(4F)4p y 5D° 0 34121.601 NJLT94
3d7(4F)4p y 5F° 5 33695.395 NJLT94
3d7(4F)4p y 5F° 4 34039.514 NJLT94
3d7(4F)4p y 5F° 3 34328.750 NJLT94
3d7(4F)4p y 5F° 2 34547.209 NJLT94
3d7(4F)4p y 5F° 1 34692.146 NJLT94
3d6(5D)4s4p(3P) z 3P° 2 33946.931 NJLT94
3d6(5D)4s4p(3P) z 3P° 1 34362.871 NJLT94
3d6(5D)4s4p(3P) z 3P° 0 34555.595 NJLT94
3d64s2 b 1D 2 34636.790 NJLT94
3d7(4F)4p z 5G° 6 34843.955 NJLT94
3d7(4F)4p z 5G° 5 34782.419 NJLT94
3d7(4F)4p z 5G° 4 35257.322 NJLT94
3d7(4F)4p z 5G° 3 35611.623 NJLT94
3d7(4F)4p z 5G° 2 35856.400 NJLT94
3d7(4F)4p z 3G° 5 35379.206 NJLT94
3d7(4F)4p z 3G° 4 35767.562 NJLT94
3d7(4F)4p z 3G° 3 36079.370 NJLT94
3d7(4F)4p y 3F° 4 36686.174 NJLT94
3d7(4F)4p y 3F° 3 37162.744 NJLT94
3d7(4F)4p y 3F° 2 37521.158 NJLT94
3d6(5D)4s4p(1P) y 5P° 3 36766.964 NJLT94
3d6(5D)4s4p(1P) y 5P° 2 37157.564 NJLT94
3d6(5D)4s4p(1P) y 5P° 1 37409.552 NJLT94
3d7(2F)4s d 3F 2 36940.588 NJLT94
3d7(2F)4s d 3F 3 36975.586 NJLT94
3d7(2F)4s d 3F 4 37045.932 NJLT94
3d7(4F)4p y 3D° 3 38175.352 NJLT94
3d7(4F)4p y 3D° 2 38678.036 NJLT94
3d7(4F)4p y 3D° 1 38995.733 NJLT94
3d6(5D)4s4p(1P) x 5D° 4 39625.801 NJLT94
3d6(5D)4s4p(1P) x 5D° 3 39969.850 NJLT94
3d6(5D)4s4p(1P) x 5D° 2 40231.333 NJLT94
3d6(5D)4s4p(1P) x 5D° 1 40404.515 NJLT94
3d6(5D)4s4p(1P) x 5D° 0 40491.281 NJLT94
3d5(6S)4s24p y 7P° 4 40421.935 NJLT94
3d5(6S)4s24p y 7P° 3 40207.088 NJLT94
3d5(6S)4s24p y 7P° 2 40052.032 NJLT94
3d6(5D)4s4p(1P) x 5F° 5 40257.311 NJLT94
3d6(5D)4s4p(1P) x 5F° 4 40594.429 NJLT94
3d6(5D)4s4p(1P) x 5F° 3 40842.151 NJLT94
3d6(5D)4s4p(1P) x 5F° 2 41018.048 NJLT94
3d6(5D)4s4p(1P) x 5F° 1 41130.596 NJLT94
3d8 c 3P 2 40871.409 NJLT94
3d8 c 3P 1 41178.409 NJLT94
3d8 c 3P 0 41234.502 NJLT94
3d6(3P)4s4p(3P) z 5S° 2 40894.987 NJLT94
3d6(3P)4s4p(3P) x 5P° 3 42532.738 NJLT94
3d6(3P)4s4p(3P) x 5P° 2 42859.775 NJLT94
3d6(3P)4s4p(3P) x 5P° 1 43079.020 NJLT94
3d6(3H)4s4p(3P) y 5G° 6 42784.349 NJLT94
3d6(3H)4s4p(3P) y 5G° 5 42911.914 NJLT94
3d6(3H)4s4p(3P) y 5G° 4 43022.982 NJLT94
3d6(3H)4s4p(3P) y 5G° 3 43137.484 NJLT94
3d6(3H)4s4p(3P) y 5G° 2 43210.022 NJLT94
Fe II (6D9/2) Limit 63737 SC85