A1 Journal article (refereed)
Evidence of oblate-prolate shape coexistence in the strongly-deformed nucleus 119Cs (2021)

Zheng, K.K., Petrache, C.M., Zhang, Z.H., Zhao, P.W., Wang, Y.K., Astier, A., Lv, B.F., Greenlees, P.T., Grahn, T., Julin, R., Juutinen, S., Luoma, M., Ojala, J., Pakarinen, J., Partanen, J., Rahkila, P., Ruotsalainen, P., Sandzelius, M., Sarén, J., . . . Page, R.D. (2021). Evidence of oblate-prolate shape coexistence in the strongly-deformed nucleus 119Cs. Physics Letters B, 822, Article 136645. https://doi.org/10.1016/j.physletb.2021.136645

JYU authors or editors

Publication details

All authors or editors: Zheng, K.K.; Petrache, C.M.; Zhang, Z.H.; Zhao, P.W.; Wang, Y.K.; Astier, A.; Lv, B.F.; Greenlees, P.T.; Grahn, T.; Julin, R.; et al.

Journal or series: Physics Letters B

ISSN: 0370-2693

eISSN: 1873-2445

Publication year: 2021

Volume: 822

Article number: 136645

Publisher: Elsevier

Publication country: Netherlands

Publication language: English

DOI: https://doi.org/10.1016/j.physletb.2021.136645

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/77951

Publication is parallel published: https://repo.scoap3.org/records/64685


Prolate-oblate shape coexistence close to the ground state in the strongly-deformed proton-rich A≈120 nuclei is reported for the first time. One of the four reported bands in 119Cs, built on a 11/2− state at 670 keV, consists of nearly degenerate signature partners, and has properties which unequivocally indicate the strongly-coupled πh11/2[505]11/2− configuration associated with oblate shape. Together with the decoupled πh11/2[541]3/2− band built on the 11/2− prolate state at 110 keV, for which a half-life of T1/2=55(5)μs has been measured, the new bands bring evidence of shape coexistence at low spin in the proton-rich strongly deformed A≈120 nuclei, a phenomenon predicted since long time, but not yet observed. Calculations using the particle-number conserving cranked shell model and two dimensional tilted axis cranking covariant density functional theory support and well reproduce the observed oblate and prolate coexisting low-energy states in 119Cs.

Keywords: nuclear physics; cesium

Free keywords: Nuclear reaction; 58Ni(64Zn,3p)119Cs; Measured γγγ-coincidences; Angular correlations; Linear polarization; Model calculation; Oblate-prolate coexistence

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2021

JUFO rating: 2

Last updated on 2022-20-09 at 16:00