The 76Cu conundrum remains unsolved

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F25%3A00384404" target="_blank" >RIV/68407700:21670/25:00384404 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.physletb.2025.139551" target="_blank" >https://doi.org/10.1016/j.physletb.2025.139551</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.physletb.2025.139551" target="_blank" >10.1016/j.physletb.2025.139551</a>

Result language
angličtina
Original language name
The 76Cu conundrum remains unsolved
Original language description
Near the doubly-magic nucleus Ni-78 (Z = 28, N = 50), there has been a decades-long debate on the existence of a long-lived isomer in Cu-76. A recent mass measurement claimed to have settled the debate, by measuring the energy of the isomer and shedding light on the structure of the nucleus. In this work, we present new, more accurate, and precise values of the half-lives of the isomeric and ground states in Cu-76. Our findings suggest that both states have very similar half-lives, in the 600-700 ms range, in disagreement with the literature values, implying that they cannot be differentiated by their decay curves. These results raise more questions than they answer, reopening the debate and showing that the structures in Cu-76 are still not fully understood.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10304 - Nuclear physics

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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