Talk:Isotopes of zinc

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The decay modes listed for Zn-65 in the two different tables on this page are conflicting - I couldn't tell you what it should be without some research, but I'm sure the person who manages those tables could!

(This page says decay mode for Zn-65 is both beta and gamma: https://ehs.princeton.edu/laboratory-research/radiation-safety/radioactive-materials/radioisotope-fact-sheets/zinc-65) SCPL (talk) 18:25, 6 July 2023 (UTC)Reply

@Sara Prueitt: Good observation. The correct decay mode for ⁶⁵Zn, as given in {{NUBASE2020}}, is positron emission. While this process can include gamma rays, there is no gamma decay without beta decay, as only the ground states of ⁶⁵Zn and its decay product ⁶⁵Cu are involved. I fixed the top-right table ({{Infobox zinc isotopes}}) to reflect the correct decay modes. ^Complex/_Rational 20:29, 6 July 2023 (UTC)Reply

Mass of ⁴He + ⁵⁶Ni = 4.002603254130 + 55.942132 = 59.944735

Mass of ⁶⁰Zn = 59.941827, which is smaller? 129.104.241.214 (talk) 21:15, 25 October 2023 (UTC)Reply

You are correct, it is exothermic. And adding further alphas is actually exothermic all the way to ¹⁰⁰Sn. The problem is rather that it is not exothermic enough: the amount of energy released drops sharply after ⁵⁶Ni, and addition of further alphas cannot effectively compete with photodisintegration. Double sharp (talk) 09:00, 13 December 2023 (UTC)Reply

And also, the energy differences between the isobaric pairs ⁶⁴Ni-⁶⁴Zn (1095.28 keV) and ⁷⁰Zn-⁷⁰Ge (998.46 keV) are quite large, compared with other even-even isobaric pairs that surrounds an odd neutron number with no beta-stable isotones and an odd atomic number with two beta-stable isotopes (like 432.13 keV for ³⁶S-³⁶Ar); see the table of Talk:Double beta decay. 129.104.241.214 (talk) 10:03, 19 February 2024 (UTC)Reply