Improved version of a simplified method for including tensor effects in cluster models

N. Itagaki and A. Tohsaki
Phys. Rev. C 97, 014304 – Published 12 January 2018

Abstract

The tensor contribution can be directly incorporated in the cluster model in a simplified way. In conventional α cluster models, the contribution of the noncentral interactions exactly cancels because of the antisymmetrization effect and spatial symmetry of α clusters. The mixing of breaking components of α clusters to take into account the spin-orbit and tensor effects is needed. Previously, we proposed a simplified method to include the spin-orbit effect, and also for the tensor part, a simplified model to directly take into account the contribution of the tensor interaction (called SMT) was introduced; however, the contribution of the tensor interaction was quite limited. Here we improve SMT, which is called iSMT. Using newly proposed iSMT, the contribution of the tensor interaction in He4 is more than 40 MeV, four times larger than the previous version. The method is applied to four-α cluster structure of O16. In O16, the tensor contribution is also large, and this is coming from the finite size effect for the distances among α clusters with a tetrahedral configuration.

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  • Received 26 June 2017
  • Revised 19 October 2017

DOI:https://doi.org/10.1103/PhysRevC.97.014304

©2018 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

N. Itagaki1 and A. Tohsaki2

  • 1Yukawa Institute for Theoretical Physics, Kyoto University, Kitashirakawa Oiwake-Cho, Kyoto 606-8502, Japan
  • 2Research Center for Nuclear Physics (RCNP), Osaka University, 10-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan

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Vol. 97, Iss. 1 — January 2018

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