Talk:Isotopes of radium

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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
 * 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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Cheers.— InternetArchiveBot  (Report bug) 14:18, 15 April 2017 (UTC)

About the actinides and fission products by decay chain thingy
Radium is not an actinide. 24.115.255.37 (talk) 18:23, 2 January 2022 (UTC)
 * See the footnote in the template. Radium indeed is not an actinide, but it occurs in the decay chains of thorium and uranium, and the listed isotopes (226Radium and 228Radium) have half-lives several orders of magnitude than any of their daughters until stable lead. ComplexRational (talk) 18:49, 2 January 2022 (UTC)

221Fr and 221Ra are the lightest known nuclide to undergo cluster decay
According to Cluster decay#Experiments, 221Fr and 221Ra are the nuclides with the lowest mass number that are known to undergo cluster decay (the page Isotopes of barium says that 114Ba is predicted to undergo cluster decay, but this is not observed). So I think this "lightest nuclide" property should be noted for one of 221Fr and 221Ra or both of them in the table of isotopes, like what has been done for 242Cm.

The known isotopes of radium that undergo cluster decay (221-224,226Ra) are all beta stable. 129.104.241.214 (talk) 00:57, 4 December 2023 (UTC)


 * Noted for both of them. 221Fr has the lowest atomic number, and 221Ra is the lightest. Nucleus hydro elemon (talk) 14:24, 28 December 2023 (UTC)

Electron capture of 216Ra
NUBASE2020 says that the branching ratio of electron capture 216Ra is <1×10-8%, which means that the decay mode has never been observed, and an EC half-life not exceeding half an hour can be excluded. I do not think that we have a chance to observe the actual decay. 129.104.241.214 (talk) 13:31, 2 March 2024 (UTC)