Physics Letters B (Nov 2022)

A theoretical interpretation of the anomalous reduced E2 transition probabilities along the yrast line of neutron-deficient nuclei

  • Yu Zhang,
  • Ying-Wen He,
  • D. Karlsson,
  • Chong Qi,
  • Feng Pan,
  • J.P. Draayer

Journal volume & issue
Vol. 834
p. 137443

Abstract

Read online

The anomalous low-energy E2-related behavior of a triaxially deformed nuclei is examined within the framework of the interacting boson model. The results show striking features that include a B(E2;41+→21+)/B(E2;21+→01+)2.0 excitation energy ratio that can be tracked back to a finite-N effect, which in a large-N limit of the theory yields normal results for a stable γ-deformation. This description is shown to explain experimentally observed results in 172Pt and 168Os, and in doing so yields a deeper understanding of the physical features of a soft triaxially-deformed nucleus.