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Niobium (Nb) 
Int. Wavelength Aki Energy Configuration Term J Line Aki
(Å) (108s-1) Levels (cm-1) Ref. Ref.
1000 2029.3423 4146.036 4d3(4F)5s 5F 5 RCL00
53407.279 4d2(3F)5s5p(3P) 5D° 4
900 2033.0102 3542.561 4d3(4F)5s 5F 4 RCL00
52714.892 4d2(3F)5s5p(3P) 5D° 3
600 2109.4384 4146.036 4d3(4F)5s 5F 5 RCL00
51537.014 4d2(3F)5s5p(3P) 5F° 5
300 2697.060 1.0 1224.823 4d4 5D 4 RCL00 M00
38291.252 4d3(4F)5p 5D° 4
140 2716.622 0.43 1224.823 4d4 5D 4 RCL00 M00
38024.336 4d3(4F)5p 5F° 5
140 2721.981 0.43 801.326 4d4 5D 3 RCL00 M00
37528.382 4d3(4F)5p 5F° 4
250 2875.390 3029.629 4d3(4F)5s 5F 3 RCL00
37797.316 4d3(4F)5p 5D° 2
150 2883.174 3542.561 4d3(4F)5s 5F 4 RCL00
38216.387 4d3(4F)5p 5D° 3
300 2927.814 4146.036 4d3(4F)5s 5F 5 RCL00
38291.252 4d3(4F)5p 5D° 4
300 2950.882 4146.036 4d3(4F)5s 5F 5 RCL00
38024.336 4d3(4F)5p 5F° 5
500 3094.176 4146.036 4d3(4F)5s 5F 5 RCL00
36455.457 4d3(4F)5p 5G° 6
500 3130.782 3542.561 4d3(4F)5s 5F 4 RCL00
35474.197 4d3(4F)5p 5G° 5
400 3163.401 3029.629 4d3(4F)5s 5F 3 RCL00
34632.033 4d3(4F)5p 5G° 4
300 3194.975 2629.132 4d3(4F)5s 5F 2 RCL00
33919.244 4d3(4F)5p 5G° 3
250 3225.467 2356.816 4d3(4F)5s 5F 1 RCL00
33351.090 4d3(4F)5p 5G° 2