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National Institute of Standards and Technology NIST Physical Measurement Laboratory
NIST Atomic Spectra Database
Ionization Energies Data

Ni (all spectra)
28 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) 
  61 619.77         
  146 541.56         
  283 800            
  [443 000]           
  [613 500]           
  [871 000]           
  (1 065 000)           
  (1 307 000)           
  [1 558 000]           
  [1 812 000]           
  [2 577 200]           
  [2 836 060]           
  [3 101 600]           
  [3 462 700]           
  [3 732 400]           
  [3 995 400]           
  [4 606 000]           
  [4 895 950]           
  12 421 700            
  [13 274 000]           
  [14 183 000]           
  [15 166 000]           
  [16 196 300]           
  [17 183 300]           
  [18 515 300]           
  (19 351 330)           
  (82 985 452.1)         
  (86 909 420)           
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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