Role of tensor interaction as salvation of cluster structure in $^{44}\mathrm{Ti}$

Role of tensor interaction as salvation of cluster structure in ${}^{44}{Ti}$

Chikako Ishizuka, Hiroki Takemoto, Yohei Chiba, Akira Ono, and Naoyuki Itagaki

Phys. Rev. C 105, 064314 – Published 24 June 2022

Abstract

The ${}^{44}{Ti}$ nucleus is believed to have a ${}^{40}{Ca} + α$ cluster structure; however, $α$ ( ${}^{4}{He}$ ) cluster structure tends to be washed out when we allow its breaking due to the spin-orbit interaction. Nevertheless, $α$ clustering in medium-heavy nuclei is a popular subject recently. The tensor interaction plays an essential role in the strong binding of the ${}^{4}{He}$ , which induces the two-particle–two-hole (2p2h) excitation. Since this tensor effect is blocked when another nucleus approaches, it becomes the salvation of the ${}^{40}{Ca} + α$ clustering in ${}^{44}{Ti}$ . The competition of spin-orbit and tensor effects is investigated in the medium-heavy region for the first time.

Received 22 February 2022
Revised 24 May 2022
Accepted 14 June 2022

DOI:https://doi.org/10.1103/PhysRevC.105.064314

Physics Subject Headings (PhySH)

Cluster models Nuclear structure & decays Nucleon-nucleon interactions

39 ≤ A ≤ 58

Nuclear Physics

Authors & Affiliations

Chikako Ishizuka

Laboratory for Zero-Carbon Energy, Institute of Innovative Research, Tokyo Institute of Technology, 2-12-1-N1-9, Ookayama, Meguro-ku, Tokyo 152-8550, Japan

Hiroki Takemoto

Faculty of Pharmacy, Osaka Medical and Pharmaceutical University, 4-20-1, Nasahara, Takatsuki, Osaka 569-1094, Japan

Yohei Chiba

Department of Physics, Osaka City University, Osaka 558-8585, Japan; Nambu Yoichiro Institute of Theoretical and Experimental Physics (NITEP), Osaka City University, Osaka 558-8585, Japan; and Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki 567-0047, Japan

Akira Ono

Department of Physics, Graduate School of Science, Tohoku University, 6-3, Aramaki Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan

Naoyuki Itagaki

Yukawa Institute for Theoretical Physics, Kyoto University, Kitashirakawa Oiwake-Cho, Kyoto 606-8502, Japan

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Vol. 105, Iss. 6 — June 2022

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Physical Review C

covering nuclear physics

Role of tensor interaction as salvation of cluster structure in ${}^{44}{Ti}$

Chikako Ishizuka, Hiroki Takemoto, Yohei Chiba, Akira Ono, and Naoyuki Itagaki

Phys. Rev. C 105, 064314 – Published 24 June 2022

Abstract

Physics Subject Headings (PhySH)

Authors & Affiliations

Article Text (Subscription Required)

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Physical Review C

covering nuclear physics

Role of tensor interaction as salvation of cluster structure in Ti44

Chikako Ishizuka, Hiroki Takemoto, Yohei Chiba, Akira Ono, and Naoyuki Itagaki

Phys. Rev. C 105, 064314 – Published 24 June 2022

Abstract

Physics Subject Headings (PhySH)

Authors & Affiliations

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Role of tensor interaction as salvation of cluster structure in ${}^{44}{Ti}$