Abstract
Large-amplitude collective dynamics of shape phase transition in the low-lying states of Mg is investigated by solving the five-dimensional (5D) quadrupole collective Schrödinger equation. The collective masses and potentials of the 5D collective Hamiltonian are microscopically derived with use of the constrained Hartree-Fock-Bogoliubov plus local quasiparticle random phase approximation method. Good agreement with the recent experimental data is obtained for the excited states as well as the ground bands. For Mg, the shape coexistence picture that the deformed excited state coexists with the spherical ground state approximately holds. On the other hand, large-amplitude quadrupole-shaped fluctuations dominate in both the ground and the excited states in Mg, providing a picture that is different from the interpretation of the “coexisting spherical excited state” based on the naive inversion picture of the spherical and deformed configurations.
- Received 9 September 2011
DOI:https://doi.org/10.1103/PhysRevC.84.061302
©2011 American Physical Society