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

Nd (all spectra)
60 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) 
  44 560.11         
  [86 970]           
  [178 200]           
  [327 500]           
  [483 900]           
  (676 000)           
  (799 000)           
  (923 000)           
  (1 093 000)           
  (1 224 000)           
  (1 359 000)           
  (1 570 000)           
  (1 782 000)           
  [1 959 900]           
  (3 137 000)           
  (3 388 000)           
  (3 654 000)           
  (3 944 000)           
  (4 210 000)           
  (4 533 000)           
  (4 855 000)           
  (5 146 000)           
  (5 468 000)           
  (5 759 000)           
  (6 928 000)           
  (7 227 000)           
  (7 574 000)           
  (7 888 000)           
  (8 461 000)           
  (8 808 000)           
  (9 606 000)           
  [9 988 500]           
  (17 212 000)           
  (17 938 000)           
  (18 720 000)           
  (19 559 000)           
  (20 366 000)           
  (21 188 000)           
  (22 245 000)           
  (23 076 000)           
  (23 987 000)           
  (24 826 000)           
  (27 189 000)           
  (27 947 000)           
  (28 770 000)           
  (29 536 000)           
  (31 383 000)           
  (32 238 000)           
  (33 859 000)           
  (34 698 000)           
  (78 575 000)           
  (80 672 000)           
  (82 978 000)           
  (85 132 000)           
  (91 818 000)           
  (94 318 000)           
  (97 448 000)           
  (99 542 200)           
  (406 016 150)           
  (415 502 800)           
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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