Roles of tensor and pairing correlations on halo formation in Li11

Takayuki Myo, Kiyoshi Katō, Hiroshi Toki, and Kiyomi Ikeda
Phys. Rev. C 76, 024305 – Published 3 August 2007

Abstract

We studied the roles of the tensor and pairing correlations on the halo formation in Li11 with an extended Li9+n+n model. We first solved the ground state of Li9 in the shell-model basis by taking 2p-2h states using the Gaussian functions with variational size parameters to take into account the tensor correlation fully. In Li11, the tensor and pairing correlations in Li9 are Pauli blocked by additional two neutrons, which work coherently to make the configurations containing the 0p1/2-state pushed up and close to those containing the 1s1/2-state. Hence, the pairing interaction works efficiently to mix the two configurations by equal amount and develop the halo structure in Li11. For Li10, the inversion phenomenon of s- and p-states is reproduced in the same framework. Our model furthermore explains the recently observed Coulomb breakup strength and charge radius for Li11.

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  • Received 30 July 2006

DOI:https://doi.org/10.1103/PhysRevC.76.024305

©2007 American Physical Society

Authors & Affiliations

Takayuki Myo1,*, Kiyoshi Katō2,†, Hiroshi Toki1,‡, and Kiyomi Ikeda3,§

  • 1Research Center for Nuclear Physics (RCNP), Ibaraki, Osaka 567-0047, Japan
  • 2Division of Physics, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
  • 3The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan

  • *myo@rcnp.osaka-u.ac.jp
  • kato@nucl.sci.hokudai.ac.jp
  • toki@rcnp.osaka-u.ac.jp
  • §k-ikeda@postman.riken.go.jp

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Issue

Vol. 76, Iss. 2 — August 2007

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