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Structure of Two-Neutron Halo in Light Exotic Nuclei

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Abstract

Structure of two-neutron halo in light exotic nuclei is studied by a three-body model using the neutron–neutron interaction fixed at the low-energy scattering limit. The model is applied to the dripline nucleus \(^{22}\)C assuming a pure s-wave halo with “correlated” \(^{20}\)C-core, and a unique relation between two-neutron separation energy and halo radius is derived. It is also applied to \(^{29}\)F, where 2\(p_{3/2}\)-orbit is shown to be important for forming the halo. The estimated halo radii in \(^{22}\)C and \(^{29}\)F are found to be consistent with the recent experimental data. The halos in \(^{17}\)B and \(^{19}\)B are analyzed by the three-body model with mixed configurations of 2\(s_{1/2}^{2}\) and 1\(d_{5/2}^{2}\). The dominance of the d-orbit is found in \(^{17}\)B, while the s-orbit component is found to be about 40\(\%\) in \(^{19}\)B.

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Authors and Affiliations

  1. Department of Physics, College of Humanities and Sciences, Nihon University, Sakurajosui 3-25-40, Setagaya-ku, Tokyo, 156-8550, Japan

    Toshio Suzuki

  2. Department of Physics, The University of Tokyo, Hongo 7-3-1, Bunkyo, Tokyo, 113-0033, Japan

    Takaharu Otsuka

  3. RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan

    Takaharu Otsuka

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  1. Toshio Suzuki
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  2. Takaharu Otsuka
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Correspondence to Toshio Suzuki.

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Suzuki, T., Otsuka, T. Structure of Two-Neutron Halo in Light Exotic Nuclei. Few-Body Syst 62, 32 (2021). https://doi.org/10.1007/s00601-021-01612-5

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