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NIST Atomic Spectra Database
Ionization Energies Data

Bi (all spectra)
83 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 [2025, December 27]. National Institute of Standards and Technology, Gaithersburg, MD. DOI: https://doi.org/10.18434/T4W30F
BibTex Citation (new window)
 

 Ionization  Energy 
 (eV) 
  7.285516              
  16.703                 
  25.57075               
  45.37                  
  54.856                 
  [88.4]                  
  (103.0)                  
  (122.0)                  
  (143.0)                  
  (161.1)                  
  (183.0)                  
  (208.0)                  
  (229)                    
  (252)                    
  [272.6]                  
  [370.2]                  
  (409)                    
  (436)                    
  (464)                    
  (520)                    
  (550)                    
  (620)                    
  (660)                    
  (690)                    
  (750)                    
  (810)                    
  (870)                    
  (930)                    
  (990)                    
  (1 060)                    
  (1 120)                    
  (1 180)                    
  (1 250)                    
  (1 310)                    
  (1 380)                    
  (1 440)                    
  (1 500)                    
  (1 784)                    
  (1 840)                    
  (1 902)                    
  (1 967)                    
  (2 029)                    
  (2 090)                    
  (2 190)                    
  (2 253)                    
  (2 321)                    
  (2 385)                    
  (2 641)                    
  (2 703)                    
  (2 771)                    
  (2 835)                    
  (3 078)                    
  (3 151)                    
  (3 329)                    
  [3 401.8]                  
  (5 599)                    
  (5 740)                    
  (5 892)                    
  (6 054)                    
  (6 208)                    
  (6 358)                    
  (6 648)                    
  (6 804)                    
  (6 977)                    
  (7 137)                    
  (7 580)                    
  (7 720)                    
  (7 870)                    
  (8 010)                    
  (8 780)                    
  (8 950)                    
  (9 270)                    
  (9 430)                    
  (20 130)                    
  (20 500)                    
  (20 920)                    
  (21 300)                    
  (24 150)                    
  (24 640)                    
  (25 260)                    
  (25 656.9)                  
  (102 251.8)                  
  (104 133.4)                  
Notes:
a Uncertainty of the listed value is unknown.

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