Tensor optimized shell model using bare interaction for light nuclei

¹ Osaka Institute of Technology, Osaka, Osaka 535-8585, Japan
² Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
³ RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.

^a e-mail: myo@ge.oit.ac.jp

Abstract

We propose a new theoretical approach to calculate nuclear structure using bare nuclear interaction, in which the tensor and short-range correlations are described by using the tensor optimized shell model (TOSM) and the unitary correlation operator method (UCOM), respectively. We compare the obtained results using TOSM+UCOM for ⁴He with the rigorous calculation. We also apply TOSM to the analysis of two-neutron halo nuclei, ⁶He and ¹¹Li, on the basis of the “core with TOSM”+n+n model. The halo formation of ¹¹Li is explained by inclusion of the tensor correlation in ⁹Li core, which produces the Pauli-blocking on the p-wave neutrons in ¹¹Li and enhances the s-wave component of halo structure.