High-spin structure of neutron-rich Dy isotopes

摘要

In view of recent experimental progress on production and spectroscopy- of neutron-rich isotopes of Dy with mass number A = 166 and 168, we have made theoretical investigations on the structure of high spin states of ~(164-170)Dy isotopes in the cranked Hartree-Fock-Bogoliubov (CHFB) theory employing a pairing+quadrupole+hexadecapole model interaction. With the increase of neutron number the rotation alignment of the proton orbitals dominates the structure at high spins, which is clearly reflected in the spin dependence of the rotational g-factors. A particularly striking feature is the difference in the spin-dependent properties of ~(166)Dy as compared to that of ~(164)Dy.