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NIST Atomic Spectra Database
Ionization Energies Data

Cm (all spectra)
96 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) 
  48 330.68         
  [100 000]           
  [162 000]           
  [304 000]           
  (411 000)           
  (557 000)           
  (783 000)           
  (907 000)           
  (1 031 000)           
  (1 161 000)           
  (1 345 000)           
  (1 530 000)           
  (1 714 000)           
  (1 897 000)           
  (2 040 000)           
  (2 190 000)           
  (2 508 000)           
  (2 678 000)           
  (3 710 000)           
  (3 944 000)           
  (4 178 000)           
  (4 436 000)           
  (4 678 000)           
  (4 928 000)           
  (5 299 000)           
  (5 557 000)           
  (5 831 000)           
  (6 089 000)           
  (7 360 000)           
  (7 666 000)           
  (7 974 000)           
  (8 283 000)           
  (9 203 000)           
  (9 550 000)           
  (10 490 000)           
  (10 840 000)           
  (11 940 000)           
  (12 600 000)           
  (13 270 000)           
  (13 930 000)           
  (14 600 000)           
  (15 260 000)           
  (15 930 000)           
  (16 590 000)           
  (17 390 000)           
  (18 070 000)           
  (18 740 000)           
  (19 400 000)           
  (20 100 000)           
  (20 800 000)           
  (24 003 000)           
  (24 600 000)           
  (25 205 000)           
  (25 866 000)           
  (26 487 000)           
  (27 100 000)           
  (28 350 000)           
  (28 980 000)           
  (29 673 000)           
  (30 310 000)           
  (32 891 000)           
  (33 520 000)           
  (34 190 000)           
  (34 819 000)           
  (38 642 000)           
  (39 384 000)           
  (41 231 000)           
  (41 973 000)           
  (66 694 000)           
  (68 081 000)           
  (69 549 000)           
  (71 122 000)           
  (72 614 000)           
  (74 066 000)           
  (77 639 000)           
  (79 171 000)           
  (80 857 000)           
  (82 406 000)           
  (86 745 000)           
  (88 076 000)           
  (89 544 000)           
  (90 891 000)           
  (102 771 000)           
  (104 417 000)           
  (107 715 000)           
  (109 256 000)           
  (223 730 000)           
  (227 319 000)           
  (231 328 000)           
  (234 990 000)           
  (278 947 000)           
  (283 980 000)           
  (290 327 000)           
  (294 336 000)           
  (1 155 880 000)           
  (1 175 473 000)           
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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