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NIST Atomic Spectra Database
Ionization Energies Data

Tl (all spectra)
81 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) 
  49 266.66         
  164 765            
  240 773            
  412 500            
  505 000            
  (645 000)           
  (790 000)           
  (936 000)           
  (1 089 000)           
  (1 274 000)           
  (1 428 000)           
  (1 597 000)           
  [1 761 000]           
  [2 475 000]           
  (2 741 000)           
  (2 950 000)           
  (3 160 000)           
  (3 540 000)           
  (3 770 000)           
  (4 230 000)           
  (4 610 000)           
  (4 850 000)           
  (5 190 000)           
  (5 660 000)           
  (6 126 000)           
  (6 590 000)           
  (7 060 000)           
  (7 530 000)           
  (8 000 000)           
  (8 510 000)           
  (8 980 000)           
  (9 450 000)           
  (9 930 000)           
  (10 400 000)           
  (10 900 000)           
  (13 107 000)           
  (13 558 000)           
  (14 034 000)           
  (14 534 000)           
  (15 018 000)           
  (15 486 000)           
  (16 244 000)           
  (16 736 000)           
  (17 260 000)           
  (17 760 000)           
  (19 736 000)           
  (20 228 000)           
  (20 761 000)           
  (21 253 000)           
  (23 019 000)           
  (23 592 000)           
  (24 955 000)           
  [25 524 900]           
  (42 215 000)           
  (43 320 000)           
  (44 506 000)           
  (45 764 000)           
  (46 974 000)           
  (48 143 000)           
  (50 337 000)           
  (51 555 000)           
  (52 910 000)           
  (54 152 000)           
  (57 636 000)           
  (58 725 000)           
  (59 911 000)           
  (61 016 000)           
  (66 613 000)           
  (67 904 000)           
  (70 412 000)           
  (71 622 000)           
  (153 802 000)           
  (156 754 000)           
  (160 028 000)           
  (163 037 000)           
  (183 765 000)           
  (187 564 000)           
  (192 379 000)           
  (195 461 000)           
  (780 609 200)           
  (795 199 100)           
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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