Bochum 2018 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 25: Structure and Dynamics of Nuclei V

HK 25.4: Vortrag

Dienstag, 27. Februar 2018, 17:30–17:45, HZO 80

Hunting for the long-lived isomer 188Hf — I Kulikov¹, •K Blaum⁷, Y Litvinov¹, T Stöhlker¹, B Sun⁶, P Walker², P Woods⁸, T Yamaguchi³, and Y Zhang^4,5 — ¹GSI, Germany — ²University of Surrey, UK — ³Saitama University, Japan — ⁴Institute of Modern Physics, China — ⁵Chinese Academy of Sciences — ⁶Beihang University, China — ⁷MPI Heildelberg, Germany — ⁸Edinburgh University, UK

Isomers are long-lived nuclear states with nuclear properties different from the corresponding ground state formed by the same numbers of protons and neutrons. They can give a key information about nuclear structure, heavy-element nucleosynthesis and limits to particle stability. High-K isomers are predicted to coexist with well-deformed collective oblate rotation [1]. Significant contributions to this research field have already been made by GSI with the successful identification of isomers in exotic nuclei, using projectile-fragmentation reaction, A/q and Z selection in the FRS and the final isomer identification in the storage ring ESR. For instance, 183mHf, 184m2Hf and 186mHf isomers were discovered along with their excitation energies and half-life measurement [2]. The observation of 188Hf and confirmation of previous isomers is one of goals of the new experiment at the Experimental Storage Ring at GSI. The details of the experiment and the present status of preparations will be presented. References: [1]- G.D. Dracoulis et al., Rep. Prog. Phys. 79(2016) 076301. [2]- M.W. Reed et al., Phys. Rev. C 86 (2012) 054321.