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Radium is not an actinide. 24.115.255.37 ( talk) 18:23, 2 January 2022 (UTC)
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)
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.
Decay process | QEC (keV) | Spin change | Half-life (a) |
---|---|---|---|
170Tm → 170Er | 313.99 | 1− → 0+ (ΔJΔπ = 1−, 1 forbidden non-unique) | 268.74 |
216Ra → 216Fr | 312.09 | 0+ → 1− (ΔJΔπ = 1−, 1 forbidden non-unique) | ? |
129.104.241.214 ( talk) 13:31, 2 March 2024 (UTC)
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Hello fellow Wikipedians,
I have just modified 2 external links on Isotopes of radium. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
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Cheers.— InternetArchiveBot ( Report bug) 14:18, 15 April 2017 (UTC)
Radium is not an actinide. 24.115.255.37 ( talk) 18:23, 2 January 2022 (UTC)
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)
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.
Decay process | QEC (keV) | Spin change | Half-life (a) |
---|---|---|---|
170Tm → 170Er | 313.99 | 1− → 0+ (ΔJΔπ = 1−, 1 forbidden non-unique) | 268.74 |
216Ra → 216Fr | 312.09 | 0+ → 1− (ΔJΔπ = 1−, 1 forbidden non-unique) | ? |
129.104.241.214 ( talk) 13:31, 2 March 2024 (UTC)