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NIST Atomic Spectra Database
Ionization Energies Data

Fe (all spectra)
26 Data Rows Found 
Example of how to reference these results:
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2023). NIST Atomic Spectra Database (ver. 5.11), [Online]. Available: https://physics.nist.gov/asd [2024, July 2]. 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 
26  0  Iron    7.9024681                 0.0000012   L7743c109 
26  +1  Iron    16.19921                   0.00005     L18349 
26  +2  Iron    30.651                     0.012       L7185,L1171 
26  +3  Iron    54.91                      0.04        L17209 
26  +4  Iron    [75.00]                     0.15        L7185,L241 
26  +5  Iron    98.985                     0.015       L17209 
26  +6  Iron    124.9671                    0.0025      L22066,L5267 
26  +7  Iron    151.060                     0.012       L7185 
26  +8  Iron    [233.6]                      0.4         L7185 
26  +9  Iron    [262.10]                     0.12        L7185 
26  +10  Iron    [290.9]                      0.4         L11770 
26  +11  Iron    [330.8]                      0.6         L11770 
26  +12  Iron    [361.0]                      0.7         L7185 
26  +13  Iron    [392.2]                      0.7         L7185 
26  +14  Iron    456.2                       0.5         L17943 
26  +15  Iron    [489.312]                    0.014       L11770 
26  +16  Iron    [1 262.7]                      0.7         L11770 
26  +17  Iron    [1 357.8]                      1.9         L11770 
26  +18  Iron    [1 460]                        3           L11770 
26  +19  Iron    1 575.6                       0.5         L7185 
26  +20  Iron    [1 687.0]                      1.0         L11770 
26  +21  Iron    [1 798.4]                      0.8         L11770 
26  +22  Iron    [1 950.4]                      1.8         L11770 
26  +23  Iron    (2 045.759)                    0.007       L16264c99 
26  +24  Iron    (8 828.1864)                   0.0012      L21139 
26  +25  Iron    (9 277.6886)                   0.0003      L19200 

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