Evidence for particle-hole excitations in the triaxial strongly-deformed well of ^{163}Tm

Abstract

Two interacting, strongly-deformed triaxial (TSD) bands have been identified in the Z = 69 nucleus ^{163}Tm. This is the first time that interacting TSD bands have been observed in an element other than the Z = 71 Lu nuclei, where wobbling bands have been previously identified. The observed TSD bands in ^{163}Tm appear to be associated with particle-hole excitations, rather than wobbling. Tilted-Axis Cranking (TAC) calculations reproduce all experimental observables of these bands reasonably well and also provide an explanation for the presence of wobbling bands in the Lu nuclei, and their absence in the Tm isotopes.

arXiv comment13 pages, 7 figures

References in corpus (2)

• Description of Multi Quasi Particle Bands by the Tilted Axis Cranking Model
• A hybrid version of the tilted axis cranking model and its application to ^{128}Ba

Cited by in corpus (6)

• Quadrupole Moments of Collective Structures up to Spin $\sim$ $65\hslash$ in ${}^{157}$Er and ${}^{158}$Er: A Challenge for Understanding Triaxiality in Nuclei
• Self-consistent tilted-axis-cranking study of triaxial strongly deformed bands in ${}^{158}$Er at ultrahigh spin
• Lifetime measurements of Triaxial Strongly Deformed bands in ${}^{163}$Tm
• Kerman-Onishi conditions in self-consistent tilted-axis-cranking mean-field calculations
• Multi-quasiparticle structures up to spin $\sim 44\hslash$ in the odd-odd nucleus ${}^{168}$Ta
• Band crossings in ${}^{168}$Ta: a particle-number conserving analysis