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核物质四阶对称能中的交换项相关物理

刘志伟,  钱庄,  孙保元

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文章导航 > 原子核物理评论  > 2018 >  35(4): 549-554
刘志伟, 钱庄, 孙保元. 核物质四阶对称能中的交换项相关物理[J]. 原子核物理评论, 2018, 35(4): 549-554. doi: 10.11804/NuclPhysRev.35.04.549
引用本文: 刘志伟, 钱庄, 孙保元. 核物质四阶对称能中的交换项相关物理[J]. 原子核物理评论, 2018, 35(4): 549-554. doi: 10.11804/NuclPhysRev.35.04.549
shu
LIU Zhiwei, QIAN Zhuang, SUN Baoyuan. Physics of Fock Terms on Fourth-order Symmetry Energy of Nuclear Matter[J]. Nuclear Physics Review, 2018, 35(4): 549-554. doi: 10.11804/NuclPhysRev.35.04.549
Citation: LIU Zhiwei, QIAN Zhuang, SUN Baoyuan. Physics of Fock Terms on Fourth-order Symmetry Energy of Nuclear Matter[J]. Nuclear Physics Review, 2018, 35(4): 549-554. doi: 10.11804/NuclPhysRev.35.04.549
shu

核物质四阶对称能中的交换项相关物理

doi: 10.11804/NuclPhysRev.35.04.549
  • 1.

    兰州大学核科学与技术学院, 兰州 730000;

  • 2.

    兰州大学中子应用技术教育部工程研究中心, 兰州 730000

基金项目: 国家自然科学基金资助项目（11875152）
详细信息
    作者简介:

    刘志伟(1993-),男,辽宁丹东人,在读硕士研究生,从事粒子物理与原子核物理研究

    通讯作者: 孙保元,E-mail:sunby@lzu.edu.cn

  • 中图分类号: O571.53

Physics of Fock Terms on Fourth-order Symmetry Energy of Nuclear Matter

  • 1.

    School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China;

  • 2.

    Engineering Research Center for Neutron Application Technology, Ministry of Education, Lanzhou University, Lanzhou 730000, China

Funds: National Natural Science Foundation of China(11875152)

  • 摘要: 基于协变密度泛函（CDF）理论，核物质四阶对称能可以被分解为动能部分，同位旋单态势能部分以及同位旋三重态势能部分。交换项的引入明显改变了同位旋单态势能部分和同位旋三重态势能部分的密度行为，特别是来自同位旋标量介子-核子耦合道的交换项贡献提供了一个压制作用。作为一种有益的尝试，引入广义的对称能，可以更直观地统一描述核物质各阶对称能效应。


    The density dependence of nuclear fourth-order symmetry energy S4 is studied within the covariant density functional (CDF) theory in terms of the kinetic energy, isospin-singlet, and isospin-triplet potential energy parts of the energy density functional. When the Fock diagram is introduced, it is found that both isospin-singlet and isospin-triplet components of the potential energy plays important roles in determining the fourth-order symmetry energy. Especially, an extra suppression, which comes from the Fock terms via isoscalar meson-nucleon coupling channels, is revealed in the isospin-triplet potential part of the fourth-order symmetry energy. As an useful attempt, the generalized symmetry energy is introduced to describe the various orders of nuclear symmetry energies in a visual and self-consistent way.
    Abstract: The density dependence of nuclear fourth-order symmetry energy S4 is studied within the covariant density functional (CDF) theory in terms of the kinetic energy, isospin-singlet, and isospin-triplet potential energy parts of the energy density functional. When the Fock diagram is introduced, it is found that both isospin-singlet and isospin-triplet components of the potential energy plays important roles in determining the fourth-order symmetry energy. Especially, an extra suppression, which comes from the Fock terms via isoscalar meson-nucleon coupling channels, is revealed in the isospin-triplet potential part of the fourth-order symmetry energy. As an useful attempt, the generalized symmetry energy is introduced to describe the various orders of nuclear symmetry energies in a visual and self-consistent way.
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出版历程
  • 收稿日期:  2018-09-15
  • 修回日期:  2018-12-12
  • 刊出日期:  2020-05-03

核物质四阶对称能中的交换项相关物理

doi: 10.11804/NuclPhysRev.35.04.549
  • 1. 兰州大学核科学与技术学院, 兰州 730000;
  • 2. 兰州大学中子应用技术教育部工程研究中心, 兰州 730000
    • 基金项目:  国家自然科学基金资助项目（11875152）
    作者简介:

    刘志伟(1993-),男,辽宁丹东人,在读硕士研究生,从事粒子物理与原子核物理研究

    通讯作者: 孙保元,E-mail:sunby@lzu.edu.cn
  • 收稿日期: 2018-09-15
  • 修回日期: 2018-12-12
  • 刊出日期: 2020-05-03

  • 中图分类号: O571.53

摘要: 基于协变密度泛函（CDF）理论，核物质四阶对称能可以被分解为动能部分，同位旋单态势能部分以及同位旋三重态势能部分。交换项的引入明显改变了同位旋单态势能部分和同位旋三重态势能部分的密度行为，特别是来自同位旋标量介子-核子耦合道的交换项贡献提供了一个压制作用。作为一种有益的尝试，引入广义的对称能，可以更直观地统一描述核物质各阶对称能效应。


The density dependence of nuclear fourth-order symmetry energy S4 is studied within the covariant density functional (CDF) theory in terms of the kinetic energy, isospin-singlet, and isospin-triplet potential energy parts of the energy density functional. When the Fock diagram is introduced, it is found that both isospin-singlet and isospin-triplet components of the potential energy plays important roles in determining the fourth-order symmetry energy. Especially, an extra suppression, which comes from the Fock terms via isoscalar meson-nucleon coupling channels, is revealed in the isospin-triplet potential part of the fourth-order symmetry energy. As an useful attempt, the generalized symmetry energy is introduced to describe the various orders of nuclear symmetry energies in a visual and self-consistent way.

English Abstract

刘志伟, 钱庄, 孙保元. 核物质四阶对称能中的交换项相关物理[J]. 原子核物理评论, 2018, 35(4): 549-554. doi: 10.11804/NuclPhysRev.35.04.549
引用本文: 刘志伟, 钱庄, 孙保元. 核物质四阶对称能中的交换项相关物理[J]. 原子核物理评论, 2018, 35(4): 549-554. doi: 10.11804/NuclPhysRev.35.04.549
shu
LIU Zhiwei, QIAN Zhuang, SUN Baoyuan. Physics of Fock Terms on Fourth-order Symmetry Energy of Nuclear Matter[J]. Nuclear Physics Review, 2018, 35(4): 549-554. doi: 10.11804/NuclPhysRev.35.04.549
Citation: LIU Zhiwei, QIAN Zhuang, SUN Baoyuan. Physics of Fock Terms on Fourth-order Symmetry Energy of Nuclear Matter[J]. Nuclear Physics Review, 2018, 35(4): 549-554. doi: 10.11804/NuclPhysRev.35.04.549
shu

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