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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 [2023, December 3]. National Institute of Standards and Technology, Gaithersburg, MD. DOI: https://doi.org/10.18434/T4W30F
BibTex Citation (new window)
 

 At. Num.   El.  name   Isoel.  Seq.   Ground  Shells   Ground  Level   Ionization  Energy 
 (eV) 		 Uncertainty
 (eV) 		  References 
8  Oxygen  O  1s22s22p4   3P2    13.618055                  0.000007    L74,L3760 
8  Oxygen  N  1s22s22p3   4S°3/2    35.12112                   0.00006     L11267,L10621 
8  Oxygen  C  1s22s22p2   3P0    [54.93554]                  0.00012     L11770 
8  Oxygen  B  1s22s22p   2P°1/2    77.41350                   0.00025     L648 
8  Oxygen  Be  1s22s2   1S0    113.8990                    0.0005      L7288 
8  Oxygen  Li  1s22s   2S1/2    [138.1189]                   0.0021      L4713 
8  Oxygen  He  1s2   1S0    [739.32683]                  0.00006     L10054 
8  Oxygen  H  1s   2S1/2    (871.4099138)                0.0000012   L19200 

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