[skip navigation]
[ASD Home][Lines Query][Levels Query][List of Spectra][Ground States and Ionization Energies][Bibliography][Help] NIST Physical Measurement Laboratory
National Institute of Standards and Technology NIST Physical Measurement Laboratory
NIST Atomic Spectra Database
Ionization Energies Data

Ba (all spectra)
56 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) 
  42 034.91         
  80 686.30         
  289 100            
  [379 300]           
  (468 000)           
  (573 000)           
  (694 000)           
  (815 000)           
  [1 052 800]           
  [1 181 800]           
  (1 944 000)           
  (2 154 000)           
  (2 387 000)           
  (2 621 000)           
  (2 855 000)           
  (3 146 000)           
  (3 404 000)           
  (3 670 000)           
  (3 936 000)           
  (4 194 000)           
  (5 210 000)           
  (5 477 000)           
  (5 783 000)           
  (6 065 000)           
  (6 525 000)           
  (6 823 000)           
  (7 541 000)           
  [7 877 000]           
  (13 671 000)           
  (14 324 000)           
  (15 034 000)           
  (15 792 000)           
  (16 510 000)           
  (17 276 000)           
  (18 196 000)           
  (18 946 000)           
  (19 777 000)           
  (20 543 000)           
  (22 696 000)           
  (23 398 000)           
  (24 148 000)           
  (24 850 000)           
  (26 342 000)           
  (27 124 000)           
  (28 600 000)           
  (29 359 000)           
  (67 154 000)           
  (69 081 000)           
  (71 227 000)           
  (73 211 000)           
  (78 550 000)           
  (80 841 000)           
  (83 688 000)           
  (85 627 200)           
  (350 733 160)           
  (359 413 810)           
Notes:
a Uncertainty of the listed value is unknown.

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

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