Low-lying states and isospin excitation in the Ge isotopes

The level structure of 64-70Ge isotopes has been studied within the framework of the interacting boson model-3(IBM-3) . The symmetry character in the proton and neutron degrees of freedom of the energy levels has been investigated. The isospin excitation states(T > Tz) have been assigned for the 64Ge(N = Z) nucleus. Some intruder states in these nuclei have been suggested. The calculated energy levels and transition probabilities are in good agreement with recent experimental data. The study indicates that ...