Talk:Isotopes of niobium
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Evident table error
[edit]According to the table 109Nb has two decay branches representing 69+69=138% of the total number of decays.150.227.15.253 (talk) 14:07, 11 February 2022 (UTC)
Does 92Nb occur in trace amount?
[edit]If so, this should be indicated in the table. 2A04:CEC0:1011:B1F1:C5E3:F416:5CD7:1B03 (talk) 23:22, 13 November 2023 (UTC)
- This is already settled. Note that "trace" is also what is written in the page p-nuclei. 14.52.231.91 (talk) 00:26, 19 August 2024 (UTC)
92Nb actually can only undergo EC
[edit]I mean that positron emission is (almost) impossible. From here, we know that the maximum beta plus energy of 92Nb is 2005.9 keV, but the spin of 92Nb is 7+, so beta plus decay would be impossible except to the 4+ state of 92Zr with an energy of 1495.46 keV above the ground state. The decay schema of 92Nb confirms this. — Preceding unsigned comment added by 103.166.228.86 (talk) 13:05, 9 September 2024 (UTC)
Its interesting that 91Nb is not a gamma emitter, but 91mNb is.
[edit]The EC energies of 91Nb (9/2+) and 91mNb (1/2-) are respectively 1258.0 keV and 1362.6 keV, so they can decay to either the ground state (5/2+) or the 1204.81 keV state (1/2+) of 91Zr. There is no problem for 91mNb to decay to the 1204.81 keV state of 91Zr, but for 91Nb it would be almost impossible, so 91Nb undergoes pure beta decay. See the decay scheme of 91Nb and the decay scheme of 91mNb for details. 129.104.241.112 (talk) 11:24, 26 November 2024 (UTC)