Role of tensor force in light nuclei with tensor-optimized shell model

3rd International Workshop on "State of the Art in Nuclear Cluster Physics"

Myo, T.^1,2 ; Umeya, A.^3 ; Horii, K.^4 ; Toki, H.^2 ; Ikeda, K.^5

General Education, Faculty of Engineering, Osaka Institute of Technology, Osaka

535-8585, Japan^1

Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka

567-0047, Japan^2

Human Science and Common Education, Faculty of Engineering, Nippon Institute of Technology, Saitama

345-8501, Japan^3

Department of Physics, Tokyo Institute of Technology, Meguro

152-8551, Japan^4

RIKEN Nishina Center, Wako, Saitama

351-0198, Japan^5

关键词: Different structure;    Highly excited state;    Light nuclei;    Nucleon-nucleon interaction;    Operator method;    Shell models;    Short-range correlations;    Tensor force;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/569/1/012065/pdf
DOI  :  10.1088/1742-6596/569/1/012065

来源: IOP

【 摘 要 】

We investigate the structures of light nuclei focusing on the role of the tensor force. We describe the tensor and short-range correlations with the tensor optimized shell model (TOSM) and the unitary correlation operator method (UCOM), respectively. In the TOSM, the 2p2h states are fully optimized to describe the large tensor contribution that brings high momentum components explicitly in the wave function. We use a bare nucleon-nucleon interaction AV8' and discuss the structures of the He and Li isotopes, such as the excitation energy spectra and the radii. We also investigate the structures of8Be from the ground-band states to the highly excited states. These states of8Be are indicated to have different structures of the 2α clustering states and the shell-model like states.