Talk:Isotopes of technetium

43Tc Technetium stability data

As per the 2006-2007 (87th edition) CRC handbook, the element 43 Technetium has 3 relatively long half-lived isotopes. They are: OE43TC97 with 4.2x10e^6 years (log half-life value = 14.1), OO43Tc98 with 6.6x10e^6 years (log half-life = 14.3, and Oe43Tc99 with 2.13x10e^5 years (log half-life = 12.8). On the heavier side of this grouping, the half-life is reported as falling off rapidly to the low values of only: 15.8 seconds (log half-life = 1.20 for OO43Tc100, and then only 5.3 seconds (log half-life = 0.72} for OO43TC102. However at OO43Tc104 has risen back to 18.2 minutes (log half-life = 3.04), which is a highly irregular variation in the noted half-lives of the OO Isotopes of this element.WFPM (talk) 03:55, 18 April 2013 (UTC)

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Could ⁹⁶Tc possibly undergo β- decay to ⁹⁶Ru?

This is energetically allowed, but perhaps will never happen (like the case of ¹⁵⁰Eu). 129.104.241.214 (talk) 11:32, 24 October 2023 (UTC)

⁹⁶Tc cannot decay to ⁹⁶Ru, because the 6⁺ state of ⁹⁶Tc is as high as 2149.74 keV, while the theoretical decay energy of ⁹⁶Tc (7^- state) to ⁹⁶Ru is only 259 keV.

Similarly, the 3^- state of ¹⁵⁰Gd is as high as 1134.297 keV, and the 4⁺ state 1288.42 keV, while the theoretical decay energy of ¹⁵⁰Eu (5^- state) to ¹⁵⁰Gd is only 972 keV. 14.52.231.91 (talk) 01:44, 16 August 2024 (UTC)

Decay of 99m

According to the table 99mTc decays by IT or beta, but in the article nuclear isomer it decays by 140keV gamma, which seems more typicical for a nuclear isomer.94.234.116.152 (talk) 23:22, 12 December 2023 (UTC)

Lack of ⁹⁸Tc decay to ⁹⁸Mo

The process ⁹⁸Tc (6⁺) → ⁹⁸Ru (4⁺), Q = 395.23 keV is well-known, while ⁹⁸Tc (6⁺) → ⁹⁸Mo (4⁺), Q = 173.95 keV is not even known. This is very strange! I mean, there is no collective nuclear rotation involved here, so in theory these two processes should not have half-lives differing to much (perhaps about 2-3 orders of magnitude). So what counts as differences between ⁹⁸Ru and ⁹⁸Mo?

It is precisely the examples of ⁹⁸Tc and those nuclides whose spins of beta daughters are due to collective nuclear rotation (¹⁷⁶Lu, ²³⁶Np, ²⁴⁸Bk and ^186mRe, ^242mAm) that show that beta decays are extremely difficult for modelization! 14.52.231.91 (talk) 01:51, 16 August 2024 (UTC)