Speaker
Dr
Megumi NIIKURA
(Department of Physics, University of Tokyo)
Description
A β-decay spectroscopy experiment in the closest vicinity of 78Ni was performed at RIBF as a part of the EURICA campaign. The low-lying level structure in odd-mass isotonic chain along the neutron magic number of N=50 is determined by the neutron single-particle evolution with decreasing proton number. Some reduction of the neutron single-particle energy gap between 2d5/2 and 3s1/2 orbitals was already indicated by the β-decay studies on 83Ge. Theoretical models, that have attempted to extend this evolution towards 78Ni, are not yet in agreement. We have performed the β-decay measurement of neutron-rich Cu isotopes in order to determine the low-lying level structure in Zn istopes which have only two valence protons above 78Ni. In this contribution, the newly constructed level schemes of 79-81Zn will be presented. The shell structure and its evolution based on the comparison with shell-model calculations will also be discussed.
Primary author
Dr
Megumi NIIKURA
(Department of Physics, University of Tokyo)
