Abstract
The empirical proton-neutron interaction for even-even Ra isotopes is analyzed by using the covariant density functional theory and the quadrupole-octupole collective Hamiltonian approach. It is shown that the static deformation and collective fluctuation are crucial ingredients for good reproduction of the data. Particularly, the introduction of octupole deformation dramatically changes the with . The collective fluctuation smoothly corrects the with good trend. Taking as an example, the detailed contributions from the static deformation and the collective fluctuation are analyzed, and the microscopic single-particle levels, the octupole driving pairs, and the enhancement of proton-neutron interaction are discussed.
- Received 24 July 2019
- Revised 25 September 2019
DOI:https://doi.org/10.1103/PhysRevC.100.054303
©2019 American Physical Society