Transition from gamma-rigid to gamma-soft dynamics in the interacting boson model: Quasicriticality and quasidynamical symmetry (Article No. 014319)
2009
Abstract
We study the transition from the gamma-rigid to gamma-soft collective nuclear dynamics across the Casten triangle of the interacting boson model using mean-field techniques and confront the description with the exact diagonalization. We inspect the domain of validity of the SU(3) quasidynamical symmetry inside the Casten triangle and reveal critical behavior within the low-lying excited spectrum due to a degeneracy of beta and gamma vibrations.