Abstract
Applying the semirealistic interactions that include a realistic tensor force to the Hartree-Fock calculations, we investigate tensor-force effects on the single-particle levels in Ca isotopes. The semirealistic interactions successfully describe the experimental difference between and (denoted by ) both at Ca and Ca, confirming the importance of the tensor force. The tensor force plays a role in the dependence of also in neutron-rich Ca nuclei. While the – inversion is predicted in heavier Ca nuclei as in Ca, it takes place only for , delayed by the tensor force. We further investigate the possibility of proton bubble structure in Ar, which is suggested by the – inversion in Ca and more neutron rich Ca nuclei, by using spherical Hartree-Fock-Bogolyubov calculations. Even with the inversion at Ca the pair correlation prohibits prominent bubble distribution in Ar. Bubble structure in Ar is unlikely also near the neutron drip line because of either unboundness or deformation. However, Si remains a candidate for proton bubble structure, owing to the large shell gap between and .
- Received 15 November 2012
DOI:https://doi.org/10.1103/PhysRevC.87.067305
©2013 American Physical Society