Configuration-interaction projected density functional theory: Effects of four-quasiparticle configurations and time-odd interactions

Abstract

The effects of four-quasiparticle configurations and time-odd interactions are investigated in the framework of configuration-interaction projected density functional theory by taking the yrast states of $^{60}\mathrm{Fe}$ as examples. Based on the universal PC-PK1 density functional, the energies of the yrast states with spin up to $20\ensuremath{\hbar}$ and the available $B(E2)$ transition probabilities are well reproduced. The yrast states are predicted to be of four-quasiparticle structure above spin $I=16\ensuremath{\hbar}$. The inclusion of the time-odd interactions increases the kinetic moments of inertia and delays the appearance of the first band crossing, and, thus, improves the description of the data.