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

Lr (all spectra)
103 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) 
  40 005          
  (117 300)         
  (175 850)         
  [352 000]         
  (452 000)         
  (645 000)         
  (774 000)         
  (976 000)         
  (1 153 000)         
  (1 331 000)         
  (1 589 000)         
  (1 742 000)         
  (1 968 000)         
  (2 173 000)         
  (2 340 000)         
  (2 600 000)         
  (2 775 000)         
  (3 020 000)         
  (3 250 000)         
  (3 480 000)         
  (3 700 000)         
  (3 930 000)         
  (4 140 000)         
  (4 330 000)         
  (4 530 000)         
  (6 009 000)         
  (6 283 000)         
  (6 562 000)         
  (6 869 000)         
  (7 162 000)         
  (7 436 000)         
  (7 945 000)         
  (8 227 000)         
  (8 558 000)         
  (8 856 000)         
  (10 324 000)         
  (10 663 000)         
  (11 009 000)         
  (11 356 000)         
  (12 663 000)         
  (13 060 000)         
  (14 200 000)         
  (14 600 000)         
  (16 190 000)         
  (16 940 000)         
  (17 690 000)         
  (18 446 000)         
  (19 200 000)         
  (19 900 000)         
  (20 700 000)         
  (21 500 000)         
  (22 400 000)         
  (23 100 000)         
  (23 900 000)         
  (24 700 000)         
  (25 400 000)         
  (26 200 000)         
  (30 173 000)         
  (30 818 000)         
  (31 504 000)         
  (32 230 000)         
  (32 924 000)         
  (33 593 000)         
  (35 166 000)         
  (35 876 000)         
  (36 634 000)         
  (37 343 000)         
  (40 223 000)         
  (40 908 000)         
  (41 650 000)         
  (42 344 000)         
  (47 772 000)         
  (48 603 000)         
  (50 708 000)         
  (51 523 000)         
  (80 026 000)         
  (81 535 000)         
  (83 140 000)         
  (84 866 000)         
  (86 495 000)         
  (88 068 000)         
  (92 552 000)         
  (94 238 000)         
  (96 077 000)         
  (97 779 000)         
  (102 529 000)         
  (103 989 000)         
  (105 586 000)         
  (107 062 000)         
  (123 774 000)         
  (125 629 000)         
  (129 331 000)         
  (131 041 000)         
  (261 170 000)         
  (265 074 000)         
  (269 438 000)         
  (273 414 000)         
  (335 212 000)         
  (341 003 000)         
  (348 093 000)         
  (352 940 000)         
  (1 372 079 000)         
  (1 394 760 000)         
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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