中国物理B ›› 2009, Vol. 18 ›› Issue (12): 5267-5271.doi: 10.1088/1674-1056/18/12/025

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Coulomb effects on the formation of proton halo nuclei

朱民1, 李岩松2, 梁玉洁3, 周宏余3, 刘祖华4   

  1. (1)College of Science, Minzu University of China, Beijing 100081, China; (2)Department of Physics, Tsinghua University, Beijing 100084, China; (3)The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China; (4)The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;China Institute of Atomic Energy, Beijing 102413, China
  • 收稿日期:2009-01-21 修回日期:2009-04-22 出版日期:2009-12-20 发布日期:2009-12-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10435020), and the Science Foundation of the Beijing Education Committee (Grant No XK100270454).

Coulomb effects on the formation of proton halo nuclei

Liang Yu-Jie(梁玉洁)a), Li Yan-Song(李岩松)b), Zhu Min(朱民)c), Liu Zu-Hua(刘祖华)a)d), and Zhou Hong-Yu(周宏余)a)†   

  1. a The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China; b Department of Physics, Tsinghua University, Beijing 100084, China; c College of Science, Minzu University of China, Beijing 100081, China; d China Institute of Atomic Energy, Beijing 102413, China
  • Received:2009-01-21 Revised:2009-04-22 Online:2009-12-20 Published:2009-12-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10435020), and the Science Foundation of the Beijing Education Committee (Grant No XK100270454).

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摘要： This paper makes some qualitative and quantitative analyses about halo formation rules of some mirror nuclei with the relativistic mean-field (RMF) theory and the Woods--Saxon mean-field model. By analysing two opposite effects of Coulomb interaction on the proton halo formation, it finds that the energy level shift has a larger contribution than that of the Coulomb barrier when the mass number A is small, the hindrance of the Coulomb barrier becomes more obvious with the increase of the mass number A, and the overall effect of the Coulomb interaction almost disappears when A≈39 as its two effects counteract with each other.

Abstract: This paper makes some qualitative and quantitative analyses about halo formation rules of some mirror nuclei with the relativistic mean-field (RMF) theory and the Woods--Saxon mean-field model. By analysing two opposite effects of Coulomb interaction on the proton halo formation, it finds that the energy level shift has a larger contribution than that of the Coulomb barrier when the mass number A is small, the hindrance of the Coulomb barrier becomes more obvious with the increase of the mass number A, and the overall effect of the Coulomb interaction almost disappears when A ≈ 39 as its two effects counteract with each other.

Key words: Coulomb effects, halo nuclei, relativistic mean-field theory, Woods--Saxon mean-field model

中图分类号:  (Coulomb energies, analogue states)

  • 21.10.Sf
21.10.Gv (Nucleon distributions and halo features) 21.60.Cs (Shell model) 21.60.Jz (Nuclear Density Functional Theory and extensions (includes Hartree-Fock and random-phase approximations))