Isotopes of cerium

Isotope data

There do not appear to be many applications for Ce isotopes although Ce-140 is used for the production of the radioisotope Ce-141 which is used for medical research purposes. Cerium isotopes can be obtained from Trace Sciences International.

Naturally occurring isotopes

This table shows information about naturally occuring isotopes, their atomic masses, their natural abundances, their nuclear spins, and their magnetic moments. Further data for radioisotopes (radioactive isotopes) of cerium are listed (including any which occur naturally) below.
Isotope Atomic mass (ma/u) Natural abundance (atom %) Nuclear spin (I) Magnetic moment (μ/μN)
136Ce 135.907140 (50) 0.185 (2) 0
138Ce 137.905985 (12) 0.251 (2) 0
140Ce 139.905433 (4) 88.450 (51) 0
142Ce 141.909241 (4) 11.114 (51) 0

Isotopic abundances of Ce
In the above picture, the most intense ion is set to 100% since this corresponds best to the output from a mass spectrometer. This is not to be confused with the relative percentage isotope abundances which total 100% for all the naturally occurring isotopes.

Radiosotope data

Further data for naturally occuring isotopes of cerium are listed above. This table gives information about some radiosotopes of cerium, their masses, their half-lives, their modes of decay, their nuclear spins, and their nuclear magnetic moments.
Isotope Mass Half-life Mode of decay Nuclear spin Nuclear magnetic moment
134Ce 133.9090 3.16 d EC to 134La 0
135Ce 134.90915 17.7 h EC to 135La 1/2
137Ce 136.90788 9.0 h EC to 137La 3/2
139Ce 138.90665 137.6 d EC to 139La 3/2 0.9
141Ce 140.908272 32.50 d β- to 139La 7/2 1.1
143Ce 142.912382 1.38 d β- to 143La 3/2
144Ce 143.913643 284.6 d β- to 144La 0

Sheffield ChemPuter isotope pattern calculator

You can use WebElements to calculate an isotope pattern for an arbitrary chemical formula:

Edit this formula :

Note the following when entering your formula:

  • Correctly nested brackets [{()}] are OK
  • 'Pseudoelements' such as Me, Ph, Cp, and many others are OK
  • Compound names and element names such as 'water' or 'manganese' are not OK
  • Experiment with your formula to see what is possible

References

  1. Naturally occurring isotope abundances: Commission on Atomic Weights and Isotopic Abundances report for the International Union of Pure and Applied Chemistry in Isotopic Compositions of the Elements 1989, Pure and Applied Chemistry, 1998, 70, 217. [Copyright 1998 IUPAC]
  2. For further information about radioisotopes see Jonghwa Chang's (Korea Atomic Energy Research Institute) Table of the Nuclides
  3. Masses, nuclear spins, and magnetic moments: I. Mills, T. Cvitas, K. Homann, N. Kallay, and K. Kuchitsu in Quantities, Units and Symbols in Physical Chemistry, Blackwell Scientific Publications, Oxford, UK, 1988. [Copyright 1988 IUPAC]

WebElements Shop

WebElements now has a WebElements shop at which you can buy periodic table posters, mugs, T-shirts, games, molecular models, and more.

WebElements poster Periodic table t-shirts Periodic table mouse mats Molymod molecular model kits Chemistry educational resources
cerium atomic number