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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 (2014). NIST Atomic Spectra Database (ver. 5.2), [Online]. Available: http://physics.nist.gov/asd [2014, December 21]. National Institute of Standards and Technology, Gaithersburg, MD.
BibTex Citation (new window)
 

 At. Num.   El.  name   Isoel.  Seq.   Ground  Shells   Ground  Level   Ionization  Energy a 
 (eV) 
 References 
Oxygen  1s22s22p4   3P2    13.618054(7)             L74,L3760 
Oxygen  1s22s22p3   43/2    35.12111(6)              L11267,L10621 
Oxygen  1s22s22p2   3P0    [54.93554(12)]            L11770 
Oxygen  1s22s22p   21/2    77.41350(25)             L648 
Oxygen  Be  1s22s2   1S0    113.8989(5)               L7288 
Oxygen  Li  1s22s   2S1/2    [138.1189(21)]             L4713 
Oxygen  He  1s2   1S0    [739.32679(6)]             L10054 
Oxygen  1s   2S1/2    (871.40985(3))             L7188 
Notes:
Uncertainty is given in parentheses after the value. It is expressed in the units of the last decimal place of the value.

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