Semi-phenomenological description of the chiral bands in $^{188,190}Os$

TL;DR

This paper models chiral bands in $^{188,190}$Os using a particle-core approach with a generalized coherent state, identifying states with orthogonal angular momenta and analyzing their magnetic properties.

Contribution

It introduces a semi-phenomenological model that describes chiral bands and magnetic twin bands in these isotopes, highlighting the role of orthogonal angular momenta.

Findings

Identification of specific particle-core states with orthogonal angular momenta.

Observation of four bands exhibiting properties of magnetic twin bands.

Analysis of magnetic properties consistent with chiral symmetry considerations.

Abstract

A set of interacting particles are coupled to a phenomenological core described using the generalized coherent state model. Among the particle-core states a finite set which have the property that the angular momenta carried by the proton and neutron quadrupole bosons and the particles, separately, are mutually orthogonal are identified. The magnetic properties of such states are studied. All terms of the model Hamiltonian exhibit chiral symmetry except the spin-spin interaction. There are four bands of the type with two-quasiparticle-core dipole states, exhibiting properties which are specific for magnetic twin bands. An application is presented, for the isotopes $^{188, 190}$Os.