Beta decay of the very neutron-rich nucleus 85Ge

Apr 16, 2019, 5:00 PM
Cafe (House of Scientists)


House of Scientists


Ms Monika Piersa (Faculty of Physics University of Warsaw)


Beta decay of very neutron-rich nucleus 85Ge (Z=32, N=53) was studied at the Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory. A high-purity beam of 85Ge was obtained by combining two-stage electromagnetic separation with ion-source chemistry. The partial level scheme with several new transitions in the daughter nucleus 85As was proposed for the first time. The low-energy level structure of 85As was interpreted within the shell model framework. To comprehend the evolution of the level structure in N=52 isotones, the shell model calculations were extended to the neighboring 81Cu, 83Ga and 85Br nuclei. According to them, the increasing number of protons leads to a change of the expected ground-state spin values. This suggests that strong competition may appear between πf5/2 and πp3/2 proton single-particle orbitals for N=52 isotones.

Primary authors

A. Korgul (University of Warsaw, Poland) Ms Monika Piersa (Faculty of Physics University of Warsaw)

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