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

Cr (all spectra)
24 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) 
  54 575.6          
  132 971.02         
  249 700            
  [396 500]           
  [560 200]           
  731 020            
  [1 292 830]           
  [1 490 230]           
  [1 690 070]           
  [1 972 200]           
  [2 184 000]           
  [2 393 400]           
  [2 860 500]           
  [3 098 480]           
  [8 159 300]           
  [8 849 700]           
  [9 582 000]           
  [10 443 000]           
  [11 247 400]           
  [12 059 000]           
  [13 180 000]           
  (13 882 280)           
  (60 345 290.0)         
  (63 675 879.6)         
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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