One-Neutron Halo Nuclei in the Mass Region of 15 ≲ A ≲ 50 from Microscopic Structure to Reaction Observables

We briefly review our recent theoretical progress on one-neutron (1n) halo nuclei in the mass region of 15 ≲ A ≲ 50 from microscopic structure to reaction observables, by combining the deformed relativistic Hartree–Bogoliubov theory in continuum (DRHBc) and its triaxial extension (TRHBc) with the Glauber reaction model. In such an effective scheme, we first succeed in reproducing the enhanced reaction cross sections and narrow longitudinal momentum distributions of both the heaviest 1n p-wave halo nucleus 37Mg and the heavier 31Ne on a carbon target, which are loosely bound and well-deformed systems with dominant p-wave configurations of the valence neutron. To test its capability for the lighter halo cases, we select neutron-rich carbon isotopes as examples. It turns out that the DRHBc + Glauber approaches are still valid for the s-wave halo in 15C, while a better description of the ground state for 19C requires the inclusion of exchange terms and tensor forces via the deformed relativistic Hartree–Fock–Bogoliubov (D-RHFB) model.Finally, these approaches are applied to search for heavier 1n halo candidates. It was suggested that 40,42Al are promising candidates as 1n p-wave triaxial halo nuclei and 43,45Si as 1n p-wave axial halo nuclei with prominent shape decoupling from the oblate core. Our studies cast a new light on future experimental measurements for new halo nuclei.