Lifetime measurements of Triaxial Strongly Deformed bands in $^{163}$Tm

TL;DR

This study measures the quadrupole transition moments of TSD bands in $^{163}$Tm, revealing larger deformation than yrast bands but smaller than theoretical predictions, contributing to understanding nuclear deformation.

Contribution

First experimental determination of $Q_t$ moments for TSD bands in $^{163}$Tm using Doppler Shift Attenuation Method, highlighting discrepancies with theoretical models.

Findings

TSD bands exhibit larger deformation than yrast bands.

Measured $Q_t$ values are smaller than theoretical predictions.

Deformation characteristics are consistent across similar nuclei.

Abstract

With the Doppler Shift Attenuation Method, quadrupole transition moments, $Q_t$, were determined for the two recently proposed Triaxial Strongly Deformed (TSD) bands in $^{163}$Tm. The measured $Q_t$ moments indicate that the deformation of these bands is larger than that of the yrast, signature partners. However, the measured values are smaller than those predicted by theory. This observation appears to be valid for TSD bands in several nuclei of the region