Configuration-interaction relativistic Hartree-Fock model*

Abstract The configuration interaction relativistic Hartree-Fock (CI-RHF) model is developed in this work. Compared to the conventional configuration interaction shell model (CISM), the CI-RHF model can be applied to study the structural properties of a wide range of nuclei without readjusting any parameters, as the effective Hamiltonian for different model spaces can be deduced consistently from a universal density-dependent Lagrangian based on the Hartree-Fock single-particle basis. The convergence of intermediate-state excitations has been examined in evaluating the effective interactions, and the core-polarization effects are illustrated, taking as an example. Employing the CI-RHF model, both the bulk properties and low-lying spectra of even-even nuclei have been well-reproduced with the model space restricted to the shell. Studies of the isotopic evolution concerning charge radii and low-lying spectra highlight the shell closure at for neon isotopes. Furthermore, the cross-shell calculations extending from the to shell successfully reproduced the low-lying spectra of and . Notably, remarkably low excitation energies of suggest the disappearance of the conventional magicity .