Kinematic moments of inertia of A = 74 nuclei at presence of neutron-proton interactions

Abstract

Quasiparticle and collective characteristics of the isotopic triplet of 74RB, 74Kr and 74Se were studied in the Hartree-Fock-Bogolyubov approximation, in combination with a forced-rotation model depending on the rotation frequency at moderate spins. It was shown that for 74Rb, the first intersection in yrast occurs due to an aligning of the spins of the n-p pair, which leads to backbending in the behavior of the moment of inertia at ħΩ ≃ 0.25 MeV. In the last two even-even nuclei, the smooth behavior of the moment of inertia is explained by an enhancement of the competition between the T = 1 and T = 0 modes at ħΩ > 0.5 MeV.