Effect of tensor force on deformation of octupole nuclei in Skyrme-Hartree-Fock approach

摘要: The influence of the tensor force on reflection-asymmetric deformation of Ba isotopes is studied within the Skyrme-Hartree-Fock framework. For $^{144}$Ba, the noncentral tensor couplings ($\alpha_T$, $\beta_T$) enhance octupole deformation by strengthening the coupling between the $\Delta N=1$, $\Delta l=\Delta j=3$ orbital pairs located on opposite sides of the Fermi surface, whereas the central terms ($\alpha_C$, $\beta_C$) weaken it. The nucleon localization function reveals pronounced surface clustering ($\mathcal{C} \approx 0.9$), with tensor-induced variations consistent with changes in the octupole parameter $\beta_3$. These results demonstrate that tensor interactions play a key role in shaping octupole couplings and localization, offering microscopic insight into the interplay among single-particle structure, tensor-force components, and reflection-asymmetric degrees of freedom in medium-heavy nuclei.