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National Institute of Standards and Technology NIST Physical Measurement Laboratory
NIST Atomic Spectra Database
Ionization Energies Data

Se (all spectra)
34 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, April 15]. 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 
34  Selenium    9.752392                 0.000015   L2647,L4168,L5688 
34  +1  Selenium    21.196                    0.010      L17234c100 
34  +2  Selenium    31.697                    0.019      L17867 
34  +3  Selenium    42.947                    0.003      L925 
34  +4  Selenium    [68.30]                    0.10       L16139 
34  +5  Selenium    81.83                     0.03       L4300 
34  +6  Selenium    155.327                    0.012      L6168 
34  +7  Selenium    (184.0)                     2.1        L8672c99 
34  +8  Selenium    (219.0)                     2.2        L8672c99 
34  +9  Selenium    (255.0)                     2.2        L8672c99 
34  +10  Selenium    (291.0)                     2.4        L8672c99 
34  +11  Selenium    (342.9)                     2.5        L8672c99 
34  +12  Selenium    (383)                       3          L8672c99 
34  +13  Selenium    (426)                       3          L8672c99 
34  +14  Selenium    (473)                       3          L8672c99 
34  +15  Selenium    (517)                       3          L8672c99 
34  +16  Selenium    [650.5]                     2.1        L11770 
34  +17  Selenium    [693.4]                     0.7        L11770 
34  +18  Selenium    [739.8]                     1.1        L11770 
34  +19  Selenium    [798]                       3          L11770 
34  +20  Selenium    [845.8]                     2.0        L11770 
34  +21  Selenium    [887]                       4          L11770 
34  +22  Selenium    [989.6]                     1.3        L11770 
34  +23  Selenium    [1 036.36]                    0.03       L11770 
34  +24  Selenium    [2 540.7]                     1.4        L11770 
34  +25  Selenium    [2 674]                       5          L11770 
34  +26  Selenium    [2 820]                       6          L11770 
34  +27  Selenium    [2 964]                       22          L11770 
34  +28  Selenium    [3 146]                       3          L11770 
34  +29  Selenium    [3 301.8]                     2.1        L11770 
34  +30  Selenium    [3 507]                       3          L11770 
34  +31  Selenium    (3 636.526)                   0.007      L16264c99 
34  +32  Selenium    (15 367.491)                   0.003      L12128 
34  +33  Selenium    (15 968.084)                   0.009      L7188 

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