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NIST Atomic Spectra Database
Ionization Energies Data

Xe (all spectra)
54 Data Rows Found 
Example of how to reference these results:
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2024). NIST Atomic Spectra Database (ver. 5.12), [Online]. Available: https://physics.nist.gov/asd [2026, October 26]. National Institute of Standards and Technology, Gaithersburg, MD. DOI: https://doi.org/10.18434/T4W30F
BibTex Citation (new window)
 

 Ionization  Energy 
 (cm-1) 
  97 833.787         
  [169 175]            
  [250 400]            
  340 400             
  [436 700]            
  537 996             
  [738 800]            
  854 769             
  1 450 500             
  (1 629 000)            
  [1 847 200]            
  (2 057 000)            
  (2 266 000)            
  (2 533 000)            
  (2 766 000)            
  (3 017 000)            
  (3 258 000)            
  (3 500 000)            
  (4 428 000)            
  (4 694 000)            
  (4 968 000)            
  (5 243 000)            
  (5 646 000)            
  (5 936 000)            
  (6 598 000)            
  [6 912 400]            
  (12 042 000)            
  (12 671 000)            
  (13 332 000)            
  (14 050 000)            
  (14 728 000)            
  (15 478 000)            
  (16 317 000)            
  (17 042 000)            
  (17 817 000)            
  (18 551 000)            
  (20 616 000)            
  (21 269 000)            
  (21 987 000)            
  (22 672 000)            
  (23 995 000)            
  (24 745 000)            
  (26 157 000)            
  [26 889 000]            
  (61 782 000)            
  (63 629 000)            
  (65 686 000)            
  (67 605 000)            
  (72 356 000)            
  (74 550 000)            
  (77 276 000)            
  (79 126 000)            
  (324 813 380)            
  (333 106 090)            
Notes:
a Uncertainty of the listed value is unknown.

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