Investigation of isospin-triplet and isospin-singlet pairing in the A=10 nuclei B10,Be10, and C10 with an extension of the Tohsaki-Horiuchi-Schuck-Röpke wave function

Qing Zhao, Zhongzhou Ren, Mengjiao Lyu, Hisashi Horiuchi, Yoshiko Kanada-En'yo, Yasuro Funaki, Gerd Röpke, Peter Schuck, Akihiro Tohsaki, Chang Xu, Taiichi Yamada, and Bo Zhou
Phys. Rev. C 100, 014306 – Published 9 July 2019

Abstract

In order to study the nucleon-nucleon pairing effects in clustering nuclei, we formulate a superposed Tohsaki-Horiuchi-Schuck-Röpke (THSR) wave function, which includes both molecular-orbit and pairing configurations explicitly. With this new wave function, we investigate the anomalous deuteronlike pn-pairing effect in B10 with T=0 and S=1 (isoscalar) by comparing with isovector NN pairs (T=1,S=0) in Be10 and C10. Energies are calculated for the ground states of Be10,B10 and C10 nuclei, and the 11+0 excited state of B10. These energies are essentially improved comparing with studies using a previous version of THSR wave function. Furthermore, overlaps between the total wave function and the pairing component indicate that the NN pairing effect is more visible in B10 than in Be10 and C10. By analyzing the energies and the overlaps between wave function components, we observe two different mechanisms enhancing the formation of deuteronlike pairs in B10. We also discuss the pairing effect by showing average distances between components in each nucleus and density distributions of valence nucleons.

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  • Received 10 October 2018
  • Revised 25 February 2019

DOI:https://doi.org/10.1103/PhysRevC.100.014306

©2019 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Qing Zhao1,*, Zhongzhou Ren2,†, Mengjiao Lyu3,‡, Hisashi Horiuchi3,4, Yoshiko Kanada-En'yo5,§, Yasuro Funaki6, Gerd Röpke7, Peter Schuck8,9, Akihiro Tohsaki3, Chang Xu1, Taiichi Yamada6, and Bo Zhou10,11

  • 1School of Physics and Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093, China
  • 2School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
  • 3Research Center for Nuclear Physics (RCNP), Osaka University, Osaka 567-0047, Japan
  • 4International Institute for Advanced Studies, Kizugawa 619-0225, Japan
  • 5Department of Physics, Kyoto University, Kyoto 606-8502, Japan
  • 6Laboratory of Physics, Kanto Gakuin University, Yokohama 236-8501, Japan
  • 7Institut für Physik, Universität Rostock, D-18051 Rostock, Germany
  • 8Institut de Physique Nucléaire, Université Paris-Sud, IN2P3-CNRS, UMR 8608, F-91406, Orsay, France
  • 9Laboratoire de Physique et Modélisation des Milieux Condensés, CNRS-UMR 5493, F-38042 Grenoble Cedex 9, France
  • 10Institute for International Collaboration, Hokkaido University, Sapporo 060-0815, Japan
  • 11Department of Physics, Hokkaido University, 060-0810 Sapporo, Japan

  • *zhaoqing91@outlook.com
  • Corresponding author: zren@tongji.edu.cn
  • mengjiao@rcnp.osaka-u.ac.jp
  • §yenyo@ruby.scphys.kyoto-u.ac.jp

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Vol. 100, Iss. 1 — July 2019

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