Energy Levels of Neutral Niobium ( Nb I )
Configuration Term J Level(cm-1) Ref.
4d4(a 5D)5s a 6D 1/2 0.00 M52
4d4(a 5D)5s a 6D 3/2 154.19 M52
4d4(a 5D)5s a 6D 5/2 391.99 M52
4d4(a 5D)5s a 6D 7/2 695.25 M52
4d4(a 5D)5s a 6D 9/2 1050.26 M52
4d35s2 a 4F 3/2 1142.79 M52
4d35s2 a 4F 5/2 1586.90 M52
4d35s2 a 4F 7/2 2154.11 M52
4d35s2 a 4F 9/2 2805.36 M52
4d35s2 a 4P 1/2 4998.17 M52
4d35s2 a 4P 3/2 5297.92 M52
4d35s2 a 4P 5/2 5965.45 M52
4d4(a 5D)5s a 4D 1/2 8410.90 M52
4d4(a 5D)5s a 4D 3/2 8705.32 M52
4d4(a 5D)5s a 4D 5/2 9043.14 M52
4d4(a 5D)5s a 4D 7/2 9497.52 M52
4d35s2 a 2D 3/2 9439.08 M52
4d35s2 a 2D 5/2 10237.51 M52
4d4(b 3F)5s b 4F 9/2 13145.71 M52
4d4(a 5D)5p y 6F° 1/2 23984.87 M52
4d4(a 5D)5p y 6F° 3/2 24164.79 M52
4d4(a 5D)5p y 6F° 5/2 24396.80 M52
4d4(a 5D)5p y 6F° 7/2 24769.91 M52
4d4(a 5D)5p y 6F° 9/2 25199.81 M52
4d4(a 5D)5p y 6F° 11/2 25680.36 M52
4d4(a 5D)5p x 6D° 7/2 27427.07 M52
4d35s(a 5P)5p y 6P° 3/2 28278.25 M52
4d35s(a 5P)5p y 6P° 5/2 28652.66 M52
4d35s(a 5P)5p y 6P° 7/2 28973.12 M52
4d35s(a 5F)5p x 4G° 5/2 31056.60 M52
4d35s(a 5F)5p x 4G° 7/2 31485.20 M52
4d35s(a 5F)5p x 4G° 9/2 32004.63 M52
4d35s(a 5F)5p x 4G° 11/2 32572.72 M52
4d35s(a 5P)5p x 4P° 3/2 34867.68 M52
4d4(c 3F)5p u 4G° 9/2 37523.53 M52
Nb II (5D0) Limit 54513.8 RMBH87