Talk:Isotopes of astatine
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EC decay properties of 213At somehow resemble 157Tb
edit| Decay process | QEC (keV) | Spin change |
|---|---|---|
| 157Tb → 157Gd | 60.052 | 3/2+ → 3/2− (ΔJΔπ = 0−) |
| 213At → 213Po | 73.93 | 9/2− → 9/2+ (ΔJΔπ = 0−) |
Of course, considering its 125 ns half-life, observation of electron capture of 213At is infeasible (perhaps with a probability at the order of 10-15%). An upper limit of the branching ratio has not been determined, but the value is expected here to be < 2.5×10-12% (half-life > 57.87 d). 129.104.241.214 (talk) 22:24, 20 December 2023 (UTC)
Beta-decay branching ratio upper limits of 212At and 216At
editSee https://www.nndc.bnl.gov/ensnds/212/At/adopted.pdf and https://www.nndc.bnl.gov/ensnds/216/At/adopted.pdf. Neither beta mode for neither nuclide has been observed. 103.166.228.86 (talk) 05:28, 19 April 2024 (UTC)
Two excited states of 213At with half-lives greater than 100 ns are given in NNDC
editSee here. There are also a state with half-life of 85 ns and one with half-life of 82 ns. Note that the 45 μs state has longer half-life than the ground-state! 129.104.241.231 (talk) 18:50, 25 September 2024 (UTC)