Nuclear Asymptotic Normalization Coefficientsand Neutron Halo of the Excited States

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LIU Zu-Hua, LIN Cheng-Jian, ZHANG Huan-Qiao, LI Zhi-Chang, ZHANG Jing-Shang, WU Yue-Wei, YANG Feng, RUAN Ming, LIU Jian-Cheng, LI Shu-Yuan and PENG Shao-Hua. Nuclear Asymptotic Normalization Coefficientsand Neutron Halo of the Excited States[J]. Chinese Physics C, 2002, 26(7): 696-702.
LIU Zu-Hua, LIN Cheng-Jian, ZHANG Huan-Qiao, LI Zhi-Chang, ZHANG Jing-Shang, WU Yue-Wei, YANG Feng, RUAN Ming, LIU Jian-Cheng, LI Shu-Yuan and PENG Shao-Hua. Nuclear Asymptotic Normalization Coefficientsand Neutron Halo of the Excited States[J]. Chinese Physics C, 2002, 26(7): 696-702. shu
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Received: 2001-08-24
Revised: 1900-01-01
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Nuclear Asymptotic Normalization Coefficientsand Neutron Halo of the Excited States

    Corresponding author: LIU Zu-Hua,
  • China Institute of Atomic Energy, Beijing 102413, China

Abstract: We have extracted the nuclear asymptotic normalization coefficients for the virtual transitions 12B 11B+n and 13C 12C+n via two transfer reactions 11B(d,p) 12B and 12C(d, p) 13C. With these coefficients, root-mean-square radii for the valence neutron in 12B and 13C have been calculated. Our results show that the second (Jπ=2), third (Jπ=1) excited states in 12B, and the first (Jπ=1/2+) excited state in 13C are neutron halo states, whereas the third (Jπ=5/2+) excited state in 13C is a neutron skin state. The retard effects of the Coulomb potential and the orbital angular momentum on halo formation have been quantitatively examined. A unified scaling law for the mean-square radius versus the effective nucleon separation energy is established for the systems with a neutron or proton in a weekly bound state.

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