Shape transition and fluctuation in neutron-rich Cr isotopes around N = 40

Abstract

The spherical-to-prolate shape transition in neutron-rich Cr isotopes from N = 34 to 42 is studied by solving the collective Schr\"odinger equation for the five-dimensional quadrupole collective Hamiltonian. The collective potential and inertial functions are microscopically derived with use of the constrained Hartree-Fock-Bogoliubov plus local quasiparticle random-phase approximation method. Nature of the quadrupole collectivity of low-lying states is discussed by evaluating excitation spectra and electric quadrupole moments and transition strengths. The result of calculation indicates that Cr isotopes around 64Cr are prolately deformed but still possess transitional character; large-amplitude shape fluctuations dominate in their low-lying states.

17 pages, 12 figures

References in corpus (7)

• Observation of isotonic symmetry for enhanced quadrupole collectivity in neutron-rich 62,64,66Fe isotopes at N=40
• Shell model study of single-particle and collective structure in neutron-rich Cr isotopes
• Microscopic description of oblate-prolate shape mixing in proton-rich Se isotopes
• Shape mixing dynamics in the low-lying states of proton-rich Kr isotopes
• Shape changes and large-amplitude collective dynamics in neutron-rich Cr isotopes
• Microscopic Derivation of Collective Hamiltonian by Means of the Adiabatic Self-Consistent Collective Coordinate Method
• Deformation around neutron-rich Cr isotopes in axially symmetric Skyrme-Hatree-Fock-Bogoliubov method

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