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  Further Evidence for Shape Coexistence in 79Znm near Doubly Magic 78Ni

Nies, L., Canete, L., Dao, D. D., Giraud, S., Kankainen, A., Lunney, D., et al. (2023). Further Evidence for Shape Coexistence in 79Znm near Doubly Magic 78Ni. Physical Review Letters, 131(22): 222503. doi:10.1103/PhysRevLett.131.222503.

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Nies, L., Author
Canete, L., Author
Dao, D. D., Author
Giraud, S., Author
Kankainen, A., Author
Lunney, D., Author
Nowacki, F., Author
Bastin, B., Author
Stryjczyk, M., Author
Ascher, P., Author
Blaum, K.1, Author                 
Cakirli, R. B., Author
Eronen, T., Author
Fischer, P., Author
Flayol, M., Author
Girard Alcindor, V. , Author
Herlert, A., Author
Jokinen, A., Author
Khanam, A., Author
Köster, U., Author
Lange, D.1, Author                 Moore, I. D., AuthorMüller, M.1, Author                 Mougeot, M.1, Author                 Nesterenko, D. A., AuthorPenttilä, H., AuthorPetrone, C., AuthorPohjalainen, I., Authorde Roubin, A., AuthorRubchenya, V., AuthorSchweiger, Ch.1, Author                 Schweikhard, L., AuthorVilen, M., AuthorÄystö, J., Author more..
Affiliations:
1Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society, ou_904548              

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Free keywords: Mass spectrometry, Nuclear many-body theory, Radioactive beams, Shell model, 59 ≤ A ≤ 89, Binding energy & masses, Nuclear structure & decays, Nucleon-nucleon interactions
 Abstract: Isomers close to doubly magic 2878Ni50 provide essential information on the shell evolution and shape coexistence near the Z=28 and N=50 double shell closure. We report the excitation energy measurement of the 1/2+ isomer in 3079Zn49 through independent high-precision mass measurements with the JYFLTRAP double Penning trap and with the ISOLTRAP multi-reflection time-of-flight mass spectrometer. We unambiguously place the 1/2+ isomer at 942(10) keV, slightly below the 5/2+ state at 983(3) keV. With the use of state-of-the-art shell-model diagonalizations, complemented with discrete nonorthogonal shell-model calculations which are used here for the first time to interpret shape coexistence, we find low-lying deformed intruder states, similar to other N=49 isotones. The 1/2+ isomer is interpreted as the bandhead of a low-lying deformed structure akin to a predicted low-lying deformed band in 80Zn, and points to shape coexistence in 79,80Zn similar to the one observed in 78Ni. The results make a strong case for confirming the claim of shape coexistence in this key region of the nuclear chart.

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 Dates: 2023-11-30
 Publication Status: Published online
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1103/PhysRevLett.131.222503
 Degree: -

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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 131 (22) Sequence Number: 222503 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1