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

TL;DR

This paper enhances the understanding of nuclear structure by incorporating four-quasiparticle configurations and time-odd interactions into density functional theory, accurately modeling high-spin states of 60Fe.

Contribution

It introduces a novel approach combining configuration interaction with projected density functional theory to better describe high-spin nuclear states.

Findings

Accurately reproduces energies and B(E2) transition probabilities of 60Fe yrast states.

Predicts four-quasiparticle structure above spin 16ħ.

Time-odd interactions improve moments of inertia and delay band crossing.

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 60Fe as examples. Based on the universal PC-PK1 density functional, the energies of the yrast states with spin up to 20\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\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.