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NIST Atomic Spectra Database
Ionization Energies Data

O (all spectra)
8 Data Rows Found 

Example of how to reference these results:
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2022). NIST Atomic Spectra Database (ver. 5.10), [Online]. Available: https://physics.nist.gov/asd [2022, December 6]. National Institute of Standards and Technology, Gaithersburg, MD. DOI: https://doi.org/10.18434/T4W30F
BibTex Citation (new window)
 

 At. Num.   Ion  Charge   El.  name   Ionization  Energy 
 (eV) 
Uncertainty
 (eV) 
 References 
Oxygen    13.618055                  0.000007    L74,L3760 
+1  Oxygen    35.12112                   0.00006     L11267,L10621 
+2  Oxygen    [54.93554]                  0.00012     L11770 
+3  Oxygen    77.41350                   0.00025     L648 
+4  Oxygen    113.8990                    0.0005      L7288 
+5  Oxygen    [138.1189]                   0.0021      L4713 
+6  Oxygen    [739.32683]                  0.00006     L10054 
+7  Oxygen    (871.4099138)                0.0000012   L19200 

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