[skip navigation]
[ASD Home][Lines Query][Levels Query][List of Spectra][Ground States and Ionization Energies][Bibliography][Help] NIST Physical Measurement Laboratory
National Institute of Standards and Technology NIST Physical Measurement Laboratory
NIST Atomic Spectra Database
Ionization Energies Data

Co (all spectra)
27 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) 
  63 564.6         
  137 795           
  [270 200]          
  [413 500]          
  [641 200]          
  [822 700]          
  [1 040 000]          
  [1 273 000]          
  1 501 300           
  [2 221 000]          
  [2 462 610]          
  [2 711 200]          
  [3 053 200]          
  [3 306 600]          
  [3 557 500]          
  [4 129 200]          
  [4 408 530]          
  11 269 000           
  12 135 000           
  [12 950 000]          
  [13 903 000]          
  [14 872 600]          
  [15 815 200]          
  [17 094 200]          
  (17 896 440)          
  (76 979 016.5)        
  (80 753 272)          
Notes:
a Uncertainty of the listed value is unknown.

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

[ASD Home][Lines Query][Levels Query][List of Spectra][Ground States and Ionization Energies][Bibliography][Help] NIST Physical Measurement Laboratory