Evidence of oblate-prolate shape coexistence in the strongly-deformed nucleus 119Cs
نویسندگان
چکیده
Prolate-oblate shape coexistence close to the ground state in strongly-deformed proton-rich A?120 nuclei is reported for first time. One of four bands 119Cs, built on a 11/2? at 670 keV, consists nearly degenerate signature partners, and has properties which unequivocally indicate strongly-coupled ?h11/2[505]11/2? configuration associated with oblate shape. Together decoupled ?h11/2[541]3/2? band prolate 110 half-life T1/2=55(5)?s been measured, new bring evidence low spin strongly deformed nuclei, phenomenon predicted since long time, but not yet observed. Calculations using particle-number conserving cranked shell model two dimensional tilted axis cranking covariant density functional theory support well reproduce observed coexisting low-energy states 119Cs.
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2021
ISSN: ['0370-2693', '1873-2445']
DOI: https://doi.org/10.1016/j.physletb.2021.136645