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Any theoretical explanation about Th-216 and its instability?
Thorium-216 has a
magic number (physics) for neutrons of 126, and thus the atomic mass number of 90 + 126 = 216, yet Th-216 is pretty darned unstable.
The most common and stable isotope of thorium is Th-232, which has 90 protons and 142 neutrons, neither of which is a magic number. On the other hand, lead-208 has magic numbers for both protons and neutrons, 82 + 126 = 208, and bismuth-209 has a magic number for neutrons: 83 + 126 = 209, and it is practically stable.
47.215.188.197 (
talk)
05:07, 8 March 2017 (UTC)
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It is reported that 230_Th is 0.02% of thorium, Its half life is given as 75,380 years. it therefore decays 1.405e10/7.538e4 times as fast as 232_Th. That is more than 186 thousand. How on earth can 230_Th be even as much as 0.02% of existing thorium? It is a great-great-granddaughter of 238_U. So presumably occurs as 7.538e4/4.468e9 of 238_U, which is less than 0.000017 of uranium abundance.
Here's another question: Do common thorium deposits contain the 230 isotope, or does it mainly appear in uranium deposits? DaveyHume ( talk) 17:51, 8 May 2017 (UTC)
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I propose split the section Isotopes of thorium#Thorium-229m into a separate article. This section is large and probably enough to create its own article. Nucleus hydro elemon ( talk) 06:06, 5 April 2023 (UTC)
Comment: This splitting proposal has stalled for 8 months - shall we split the article or not? 141 Pr { contribs} 10:06, 7 January 2024 (UTC)
Should it be noted that 230Th is the lightest nuclide with observed spontaneous fission? 129.104.241.214 ( talk) 21:35, 22 October 2023 (UTC)
224Th and 226Th are potentially capable of double beta plus decay, and 232Th is potentially capable of double beta minus decay, although the estimated half-life should be very long. 129.104.241.214 ( talk) 11:35, 28 November 2023 (UTC)
According to [1], 234Th (decay product of 238U) should have a partial alpha decay half-life at the order of 1014 years. 129.104.241.214 ( talk) 16:17, 5 January 2024 (UTC)
Energy of the isomeric transition of 229mTh: 8.3 eV × NA = 800.8 kJ/mol, which is in the order of the energy change in a typical chemistry reaction (for example 2Na + Cl2 → 2NaCl). Does this mean that given 229Th, its isomer can be easily produced? 2A04:CEC0:10F7:4CCE:4D6B:BB75:8017:1D4 ( talk) 18:43, 24 February 2024 (UTC)