Systematic investigations of positive-parity doublet bands with three-quasiparticle configurations in $^{125,127,129,131}$Cs

TL;DR

This paper systematically investigates positive-parity doublet bands in several cesium isotopes, analyzing their experimental features and confirming their chiral nature through advanced theoretical calculations.

Contribution

It provides the first comprehensive comparison of experimental data with self-consistent tilted axis cranking calculations for these isotopes, supporting their chiral doublet band interpretation.

Findings

Experimental features align with chiral band characteristics.

Theoretical calculations reproduce experimental level schemes.

All four nuclei exhibit triaxial deformations supporting chiral bands.

Abstract

The experimental features of positive-parity doublet bands in the odd-\emph{A} cesium isotopes $^{125,127,129,131}$Cs, including angular momentum alignment, energy staggering, $B(M1)/B(E2)$ etc. are studied systematically and compared to those of the candidate chiral bands in the adjacent odd-odd Cs isotopes. The configuration assignments and the dynamics of these bands are discussed. The self-consistent tilted axis cranking relativistic mean-field calculations are performed with configuration reassigned to these bands. The experimental level schemes of four nuclei are well reproduced, and the calculations also show four nuclei have obvious triaxial deformations and thus support the candidate chiral doublet bands in $^{125,127,129,131}$Cs.