Chiral geometry in multiple chiral doublet bands

TL;DR

This paper investigates the persistence and characteristics of chiral geometry in multiple doublet bands across different triaxial deformations using the particle rotor model, revealing its dependence on the deformation parameter.

Contribution

It provides a detailed analysis of chiral geometry in multiple doublet bands with identical configurations, highlighting the influence of the triaxial deformation parameter $oldsymbol{ extgamma}$ on chirality.

Findings

Chirality persists in higher excited bands even when $ extgamma$ deviates from 30°.

Chiral geometry is strongly dependent on the $ extgamma$ parameter.

Chiral geometry in higher excited bands is less robust than in yrast and yrare bands.

Abstract

The chiral geometry of the multiple chiral doublet bands with identical configuration is discussed for different triaxial deformation parameters $\gamma$ in the particle rotor model with $\pi h_{11/2}\otimes \nu h_{11/2}^{-1}$. The energy spectra, electromagnetic transition probabilities $B(M1)$ and $B(E2)$, angular momenta, and $K$-distributions are studied. It is demonstrated that the chirality still remains not only in the yrast and yrare bands, but also in the two higher excited bands when $\gamma$ deviates from $30^{\circ}$. The chiral geometry relies significantly on $\gamma$, and the chiral geometry of the two higher excited partner bands is not as good as that of the yrast and yrare doublet bands.