Multi-quasiparticle structures up to spin $\sim 44\hslash$ in the odd-odd nucleus ${}^{168}$Ta

Abstract

High-spin states in the odd-odd nucleus ${}^{168}$Ta have been populated in the ${}^{120}$Sn(${}^{51}$V,3n) reaction. Two multi-quasiparticle structures have been extended significantly from spin $\sim 20\hslash$ to above $40\hslash$. As a result, the first rotational alignment has been fully delineated and a second band crossing has been observed for the first time in this nucleus. Configurations for these strongly-coupled rotational bands are proposed based on signature splitting, $B(M1)/B(E2)$ ratio information, and observed rotation-alignment behavior. Properties of the observed bands in ${}^{168}$Ta are compared to related structures in the neighboring odd-$Z$, odd-$N$, and odd-odd nuclei and are discussed within the framework of the cranked shell model.

9 pages, 9 figures, Gammasphere experiment

References in corpus (2)

• Evidence for particle-hole excitations in the triaxial strongly-deformed well of ^{163}Tm
• Lifetime measurements of Triaxial Strongly Deformed bands in ${}^{163}$Tm