Talk:Isotopes of cerium

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 * Added archive https://web.archive.org/web/20080923135135/http://www.nndc.bnl.gov/amdc/nubase/Nubase2003.pdf to http://www.nndc.bnl.gov/amdc/nubase/Nubase2003.pdf

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Nuclear bomb fallout?
Cerium141 was made in the Trinity nuclear bomb test, and could from what I watched only be produced by a nuclear explosion. It exposed Kodak film across the country from the processing plants. I notice the page now simply says half-life and that it's 'synthetic'.

Cristiano Toàn (talk) 02:56, 24 April 2023 (UTC)Cerium-136 decays by electron capture to Barium-136 (Cerium-136 atomic mass 135.907172, Barium-136 atomic mass 135.9045759). Each Cerium-136 decays to barium-136 releases 2.418 MeV Cerium-138 decays by electron capture to Barium-138 (Cerium-138 atomic mass 137.905991, Barium-138 atomic mass 137.9052472). Each Cerium-138 decays to barium-138 releases 0.693 MeV

_Nagelfar (talk) 15:33, 1 October 2020 (UTC)
 * And it also has a note in the main table pointing out that Ce-141 is a fission product. Double sharp (talk) 18:52, 1 October 2020 (UTC)

Possible alpha decay of 142,144,145Ce
According to, 142Ce should have an alpha decay half-life at the order of 1027 years. It is likely that its alpha decay is not ignorable compared to double beta decay: gives the theoretical half-life of double beta decay at the order of 1023 years. Given the predictions, N = 84 (double beta for 142Ce), 85 (145Nd), 87 (149Sm), 105 (177Hf), 106 (double beta for 176Yb and alpha for 178Hf) and 111 (187Os) would have no isotones with half-life exceeding the currently known longest half-life: 2.2×1024 years for 128Te.

144Ce and 145Ce have respectively an alpha decay energy of 0.41 MeV and 0.20 MeV, which is quite low, so alpha decays may be possible but with half-lives very long: at the order of 10118 years for 145Ce given by the Geiger-Nuttall law. 2A04:CEC0:1930:1F41:6CF4:C74A:1EC0:E0D8 (talk) 02:09, 17 November 2023 (UTC)