Persistent vibrational structure in ${}^{110-116}$Cd

Abstract

The empirical spectra and $E2$ decay rates in ${}^{110,112,114,116}$Cd are shown to be consistent with a vibrational interpretation for low-lying normal states, coexisting with a single deformed $\gamma$-soft band of intruder states. The observed deviations from this paradigm show up in particular non-yrast states, which are properly described by a Hamiltonian with U(5) partial dynamical symmetry. The latter is characterized by a good (broken) symmetry in most (in selected) normal states, weakly coupled to intruder states.

5 pages, 3 figures, 2 tables, accepted for publication as a Letter in Phys. Rev. C

References in corpus (2)

• Zr Isotopes as a region of intertwined quantum phase transitions
• Shape coexistence in Sr isotopes

Cited by in corpus (1)

• Systematic shell-model study of ${}^{99-129}$Cd isotopes and isomers in neutron-rich ${}^{127-131}$In isotopes