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NIST Atomic Spectra Database
Ionization Energies Data

K (all spectra)
19 Data Rows Found 

Example of how to reference these results:
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2020). NIST Atomic Spectra Database (ver. 5.8), [Online]. Available: https://physics.nist.gov/asd [2021, May 13]. 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 
19  Potassium    4.34066373                 0.00000009   L5451,L5783,L7185 
19  +1  Potassium    31.62500                    0.00019      L12188 
19  +2  Potassium    [45.8031]                    0.0017       L11770 
19  +3  Potassium    [60.917]                     0.019        L11770 
19  +4  Potassium    [82.66]                      0.16         L241 
19  +5  Potassium    [99.44]                      0.20         L7185 
19  +6  Potassium    117.56                       0.11         L7185 
19  +7  Potassium    [154.87]                      0.05         L12392 
19  +8  Potassium    [175.8174]                    0.0025       L4344 
19  +9  Potassium    [503.67]                      0.07         L11770 
19  +10  Potassium    [565.6]                       0.7          L11770 
19  +11  Potassium    [631.1]                       0.9          L11770 
19  +12  Potassium    [714.7]                       0.5          L11770 
19  +13  Potassium    [786.3]                       0.3          L11770 
19  +14  Potassium    [860.92]                      0.25         L11770 
19  +15  Potassium    [967.7]                       0.3          L11770 
19  +16  Potassium    (1 034.542)                     0.007        L16264c99 
19  +17  Potassium    (4 610.87018)                   0.00012      L8473 
19  +18  Potassium    (4 934.0484)                    0.0009       L7188 

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