Triaxiality explored by an odd quasi-particle

TL;DR

This paper investigates how an odd quasiparticle influences the triaxial shape dynamics of nuclei, showing it tends to make the core appear more rigid in its collective motion.

Contribution

It introduces a coupled model of quasiparticles with both soft and rigid triaxial cores, revealing the quasiparticle's role in modifying nuclear shape dynamics.

Findings

Quasiparticle coupling makes the core's collective motion appear more rigid.

Both soft (rotation-vibrational) and rigid (rotational) core models are analyzed.

The presence of an odd quasiparticle alters the quadrupole dynamics of the nucleus.

Abstract

The triaxiality of odd-mass nuclei is investigated by coupling a quasiparticle to an even-even core through the core-quasiparticle coupling model. Both soft and rigid triaxial cores are considered. The "soft core" is described by the collective model with rotation-vibrational motion, while the "rigid core" is described by the triaxial rotor model, which is a limiting case of the collective model with only rotational motion. We show that the presence of the odd quasiparticle modifies the collective quadrupole dynamics of the core to appear more "rigid".