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[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

Fm (all spectra)
100 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) 
  [52 400]         
  [100 000]         
  [187 000]         
  [317 000]         
  (444 000)         
  (597 000)         
  (750 000)         
  (968 000)         
  (1 097 000)         
  (1 307 000)         
  (1 494 000)         
  (1 689 000)         
  (1 908 000)         
  (2 071 000)         
  (2 230 000)         
  (2 420 000)         
  (2 630 000)         
  (2 830 000)         
  (3 040 000)         
  (3 240 000)         
  (3 468 000)         
  (3 654 000)         
  (4 968 000)         
  (5 218 000)         
  (5 485 000)         
  (5 775 000)         
  (6 041 000)         
  (6 307 000)         
  (6 751 000)         
  (7 025 000)         
  (7 332 000)         
  (7 614 000)         
  (8 953 000)         
  (9 283 000)         
  (9 610 000)         
  (9 940 000)         
  (11 070 000)         
  (11 440 000)         
  (12 490 000)         
  (12 870 000)         
  (14 250 000)         
  (14 960 000)         
  (15 680 000)         
  (16 398 000)         
  (17 110 000)         
  (17 820 000)         
  (18 540 000)         
  (19 260 000)         
  (20 100 000)         
  (20 900 000)         
  (21 600 000)         
  (22 300 000)         
  (23 000 000)         
  (23 800 000)         
  (27 447 000)         
  (28 068 000)         
  (28 721 000)         
  (29 415 000)         
  (30 084 000)         
  (30 730 000)         
  (32 149 000)         
  (32 827 000)         
  (33 553 000)         
  (34 238 000)         
  (36 989 000)         
  (37 642 000)         
  (38 368 000)         
  (39 021 000)         
  (43 699 000)         
  (44 481 000)         
  (46 490 000)         
  (47 256 000)         
  (74 171 000)         
  (75 614 000)         
  (77 171 000)         
  (78 825 000)         
  (80 397 000)         
  (81 914 000)         
  (85 995 000)         
  (87 600 000)         
  (89 382 000)         
  (91 012 000)         
  (95 593 000)         
  (96 988 000)         
  (98 537 000)         
  (99 956 000)         
  (114 394 000)         
  (116 160 000)         
  (119 693 000)         
  (121 322 000)         
  (244 733 000)         
  (248 516 000)         
  (252 726 000)         
  (256 557 000)         
  (309 983 000)         
  (315 435 000)         
  (322 219 000)         
  (326 511 000)         
  (1 275 736 000)         
  (1 297 000 000)         
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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