A1 Journal article (refereed)
Long-sought isomer turns out to be the ground state of 76Cu (2024)
Canete, L., Giraud, S., Kankainen, A., Bastin, B., Nowacki, F., Ascher, P., Eronen, T., Girard Alcindor, V., Jokinen, A., Khanam, A., Moore, I. D., Nesterenko, D., De Oliveira, F., Penttilä, H., Petrone, C., Pohjalainen, I., De Roubin, A., Rubchenya, V., Vilen, M., & Äystö, J. (2024). Long-sought isomer turns out to be the ground state of 76Cu. Physics Letters B, In Press. https://doi.org/10.1016/j.physletb.2024.138663
JYU authors or editors
Publication details
All authors or editors: Canete, L.; Giraud, S.; Kankainen, A.; Bastin, B.; Nowacki, F.; Ascher, P.; Eronen, T.; Girard Alcindor, V.; Jokinen, A.; Khanam, A.; et al.
Journal or series: Physics Letters B
ISSN: 0370-2693
eISSN: 1873-2445
Publication year: 2024
Publication date: 22/04/2024
Volume: In Press
Publisher: Elsevier
Publication country: Netherlands
Publication language: English
DOI: https://doi.org/10.1016/j.physletb.2024.138663
Publication open access: Openly available
Publication channel open access: Open Access channel
Web address of parallel published publication (pre-print): https://arxiv.org/abs/2401.14018
Abstract
Isomers close to the doubly magic nucleus 78Ni (Z = 28, N = 50) provide essential information on the shell evolution and shape coexistence far from stability. The existence of a long-lived isomeric state in 76Cu has been debated for a long time. We have performed high-precision mass measurements of 76Cu with the JYFLTRAP double Penning trap mass spectrometer at the Ion Guide Isotope Separator On-Line facility and confirm the existence of such an isomeric state with an excitation energy Ex = 64.8(25) keV. Based on the ratio of detected ground- and isomeric-state ions as a function of time, we show that the isomer is the shorter-living state previously considered as the ground state of 76Cu. The result can potentially change the conclusions made in previous works related to the spin-parity and charge radius of the 76Cu ground state. Additionally, the new 76Cu(n, γ) reaction Q-value has an impact on the astrophysical rapid neutron-capture process.
Keywords: copper; isotopes; nuclear physics
Contributing organizations
Related projects
- ENSAR2 European Nuclear Science and Application Research 2
- Jokinen, Ari
- European Commission
- Studies of exotic nuclei for understanding the origin of elements in the Universe
- Kankainen, Anu
- Research Council of Finland
- Studies of exotic nuclei for understanding the origin of elements in the Universe
- Kankainen, Anu
- Research Council of Finland
- Studies of exotic nuclei for understanding the origin of elements in the Universe
- Kankainen, Anu
- Research Council of Finland
- Tarkkuusmassamittauksia eitttäin matalien Q-arvojen määrittämiseksi mahdollistaa kandidaattiytimistä neutriinojen tutkimiseen
- Eronen, Tommi
- Research Council of Finland
- High precision atomic mass measurements of ultralow Q-value candidate nuclei for neutrino sudies-research costs
- Eronen, Tommi
- Research Council of Finland
- Masses, Isomers and Decay Studies for Elemental Nucleosynthesis
- Kankainen, Anu
- European Commission
Ministry reporting: Yes
Preliminary JUFO rating: 3