Abstract
Matter radii of the nuclei are investigated by self-consistent Hartree-Fock-Bogolyubov calculations assuming the axial symmetry. With the semirealistic M3Y-P6 interaction, the dependence of the matter radii observed in the experiments is reproduced excellently. Both the pairing and the deformation play significant roles in an intertwined manner. The nucleus has a smaller radius than the neighboring even- nuclei, which is attributed to its smaller deformation. On the other hand, a neutron halo is obtained in . We point out that, in contrast to the pairing antihalo effect that may operate on the even- nuclei, the pair correlation enhances halos in odd- nuclei, owing to the new mechanism which we call unpaired-particle haloing. The halo in is predicted to have a peanut shape in its intrinsic state, reflecting -wave contribution as in . The dependence of the deformation is significant again, by which the single-particle level dominated by the -wave component comes down.
- Received 1 May 2018
DOI:https://doi.org/10.1103/PhysRevC.98.011301
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