Prolate-oblate phase transition in the transitional nucleus 193Os
The nucleus 193Os is located in the area of gradual phase transition exhibited in the Osmium isotopes. Calculated energy surfaces based on the Gogny-D1M EDF suggest a transition from a triaxial shape at 192Os to an oblate-soft one at 194Os. Additionally, the low-lying level structure in the odd-A isotopes changes significantly between 191Os and 193Os including a change in ground state's spin. It is of particular interest to investigate the low-lying structure arising from the interplay between single-particle and collective degrees of freedom in the region of shape transition. The aim of this experiment is the precise measurement of the lifetimes of the 1/2-, 3/2- and 5/2- states and to firmly assign the spin of the low-lying states.
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KNAFLA Lukas; DUNKEL Felix; ESMAYLZADEH Arwin; GARBE Jan; GERHARD Lisa Marie; Guillaume Häfner; JOLIE Jan; KARAYONCHEV Vasil; LEY Mario; MICHELAGNOLI Caterina; REGIS Jean Marc and SCHOMACKER Kerstin. (2020). Prolate-oblate phase transition in the transitional nucleus 193Os. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.3-17-49
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