Microscopic Analysis of Shape Coexistence/Mixing and Shape Phase Transition in Neutron-Rich Nuclei around ³²Mg

Abstract

We have analyzed large-amplitude quadrupole collective dynamics in neutron-rich nuclei ^30–36Mg using the five-dimensional quadrupole collective Hamiltonian approach. The collective Hamiltonian is microscopically derived with the constrained HFB plus local quasiparticle RPA method. Enhancement of the quadrupole collectivity from ³⁰Mg to ³⁴Mg is well described by the calculation. The shape transitional behavior in the ground band and the shape coexistence/mixing properties in the ground and excited 0⁺ states are analyzed.