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NIST Atomic Spectra Database
Ionization Energies Data

Nb (all spectra)
41 Data Rows Found 
Example of how to reference these results:
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2024). NIST Atomic Spectra Database (ver. 5.12), [Online]. Available: https://physics.nist.gov/asd [2026, October 26]. National Institute of Standards and Technology, Gaithersburg, MD. DOI: https://doi.org/10.18434/T4W30F
BibTex Citation (new window)
 

 Ionization  Energy 
 (cm-1) 
  54 513.8         
  [115 500]          
  [202 000]          
  303 350           
  407 897           
  [823 240]          
  960 900           
  (1 097 000)          
  [1 284 000]          
  (1 452 000)          
  [1 615 400]          
  [1 985 000]          
  2 166 300           
  [3 892 000]          
  (4 275 000)          
  (4 686 000)          
  (5 130 000)          
  (5 549 000)          
  (6 114 000)          
  (6 581 000)          
  (7 073 000)          
  (7 582 000)          
  (8 066 000)          
  [9 485 000]          
  [9 925 700]          
  [10 434 700]          
  [11 035 000]          
  [11 606 300]          
  [12 000 000]          
  [13 113 900]          
  [13 590 190]          
  [32 424 000]          
  [33 768 000]          
  [35 239 000]          
  [36 651 000]          
  [38 832 000]          
  [40 420 000]          
  [42 467 000]          
  (43 764 170)          
  (182 668 810)          
  (188 643 800)          
Notes:
a Uncertainty of the listed value is unknown.

If you did not find the data you need, please inform the ASD Team.

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