Parabolic energy dependence of odd-odd multiplets in N=83 nuclides

Abstract

The splitting and the displacement of low-lying π g 7 2 ν f 7 2 and π d 5 2 ν f 7 2 multiplets in the odd-odd N = 83 isotones are found to be described by a quadrupole interaction between the odd proton and odd neutron. The quenching and inversion of the π d 5 2 ν f 7 2 parabola is found to arise from the quasiparticle blocking effect as the occupancy of the d 5 2 orbital changes.