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NIST Atomic Spectra Database
Ionization Energies Data

N (all spectra)
7 Data Rows Found 

Example of how to reference these results:
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2021). NIST Atomic Spectra Database (ver. 5.9), [Online]. Available: https://physics.nist.gov/asd [2022, August 12]. 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 
Nitrogen    14.53413                  0.00004    L1411 
+1  Nitrogen    [29.60125]                 0.00009    L11770 
+2  Nitrogen    [47.4453]                  0.0025     L11770 
+3  Nitrogen    77.4735                   0.0004     L7288,L876 
+4  Nitrogen    97.8901                   0.0004     L4829 
+5  Nitrogen    [552.06733]                 0.00004    L10054 
+6  Nitrogen    (667.046121)                0.000012   L7188 

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