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

Sr (all spectra)
38 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) 
  45 932.2036         
  88 965.18           
  345 879.0            
  [453 930]             
  [570 000]             
  (710 000)             
  (839 000)             
  [977 600]             
  [1 277 000]             
  1 430 000              
  2 613 800              
  (2 920 000)             
  (3 291 000)             
  (3 662 000)             
  (4 025 000)             
  (4 533 000)             
  (4 936 000)             
  (5 364 000)             
  (5 823 000)             
  (6 243 000)             
  [7 520 000]             
  [7 921 000]             
  [8 372 100]             
  [8 914 000]             
  [9 397 500]             
  [9 766 000]             
  [10 754 800]             
  [11 188 440]             
  [26 977 000]             
  [28 205 000]             
  [29 551 000]             
  [30 854 000]             
  [32 693 000]             
  [34 137 000]             
  [36 015 000]             
  (37 201 490)             
  (156 032 706)             
  (161 514 673)             
Notes:
a Uncertainty of the listed value is unknown.

If you did not find the data you need, please inform the ASD Team.

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