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NIST Atomic Spectra Database
Ionization Energies Data

Li (all spectra)
3 Data Rows Found 

Example of how to reference these results:
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2019). NIST Atomic Spectra Database (ver. 5.7.1), [Online]. Available: https://physics.nist.gov/asd [2019, October 22]. 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 
Lithium  Li  1s22s   2S1/2    5.39171495                 0.00000004   L12261 
Lithium  He  1s2   1S0    [75.6400964]                 0.0000013    L10054 
Lithium  1s   2S1/2    (122.4543581)                 0.0000008    L3620c96 

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