Isotopes of cerium

Isotopes of cerium (58Ce)
Main isotopes[1] Decay
abun­dance half-life (t1/2) mode pro­duct
134Ce synth 3.16 d ε 134La
136Ce 0.186% stable
138Ce 0.251% stable
139Ce synth 137.64 d ε 139La
140Ce 88.4% stable
141Ce synth 32.505 d β− 141Pr
142Ce 11.1% stable
143Ce synth 33.039 h β− 143Pr
144Ce synth 284.89 d β− 144Pr
Standard atomic weight Ar°(Ce)

Naturally occurring cerium (58Ce) is composed of 4 stable isotopes: 136Ce, 138Ce, 140Ce, and 142Ce, with 140Ce being the most abundant (88.45% natural abundance) and the only one that is theoretically stable. The others, 136Ce, 138Ce, and 142Ce are predicted to undergo double beta decay, which has never been observed. There are 35 radioisotopes that have been characterized, with the most stable being 144Ce, with a half-life of 284.89 days; 139Ce, with a half-life of 137.64 days and 141Ce, with a half-life of 32.505 days. All of the remaining radioactive isotopes have half-lives that are less than 4 days and the majority of these have half-lives that are less than 10 minutes.

The known isotopes of cerium range from 121Ce to 157Ce, in addition to 14 meta states.

  1. ^ Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.
  2. ^ "Standard Atomic Weights: Cerium". CIAAW. 1995.
  3. ^ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.
This article is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.