RUI: Constraining the Symmetry Energy of Neutron-Rich Nucleonic Matter at Supra-Saturation Densities

RUI:在超饱和密度下限制富中子核物质的对称能

基本信息

  • 批准号:
    1068022
  • 负责人:
  • 金额:
    $ 17.1万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2011
  • 资助国家:
    美国
  • 起止时间:
    2011-06-01 至 2016-05-31
  • 项目状态:
    已结题

项目摘要

Properties of neutron-rich nuclear matter are at the heart of many fundamental questions in nature. They are currently being explored experimentally by using a wide variety of advanced new facilities around the world. Most critical to understanding experimental observations of various novel phenomena using these facilities is the symmetry energy, which encodes the energy related to neutron-proton asymmetry in nuclear matter. The latter is a fundamental quantity currently under intense investigation in both nuclear physics and astrophysics. The density dependence of nuclear symmetry energy is a vital ingredient in describing the structure of neutron stars and neutron-rich nuclei and the dynamics of heavy-ion reactions. It also influences significantly the strain amplitude, frequency and damping time of gravitational waves from both rotating and oscillating neutron stars. Moreover, the high-density behavior of the symmetry energy is also closely connected to the possible non-Newtonian gravity at short distance due to either the geometrical effects of extra space-time dimensions or the exchange of new bosons predicted by super-symmetric extensions of the Standard Model of particle physics. However, our current knowledge about the nuclear symmetry energy especially at super-saturation densities is very poor. The ultimate goal of my work supported by this NSF grant is to determine the symmetry energy of dense neutron-rich nucleonic matter using nuclear reactions especially those induced by high energy rare isotope beams and to examine its impacts on astrophysics and cosmology. To realize this goal, effects of the tensor force, isospin dependence of the short-range nucleon-nucleon correlation function and spin-isospin dependence of the three-body force on the high-density behavior of the nuclear symmetry energy and their manifestations in nuclear reactions and neutron stars will be investigated. The proposed activities will have significant impacts on advancing our knowledge not only in nuclear physics but also in astrophysics and cosmology. Moreover, the PI will promote more close integration of research, teaching, training, and learning by involving proactively both graduate and undergraduate students in carrying out the proposed research. This project will help better prepare students to become next generation scientists and engineers. Furthermore, the project will further enhance the infrastructure and conditions for both research and education at Texas A&M University-Commerce.
丰中子核物质的性质是自然界许多基本问题的核心。 目前正在世界各地利用各种先进的新设施进行实验性探索。 对于理解使用这些设备的各种新现象的实验观测来说,最关键的是对称能,它编码了与核物质中的中子-质子不对称有关的能量。 后者是目前在核物理学和天体物理学中正在深入研究的基本量。 核对称能的密度依赖性是描述中子星和丰中子核的结构以及重离子反应动力学的重要组成部分。 它还显著影响来自旋转和振荡中子星的引力波的应变振幅、频率和阻尼时间。 此外,由于额外时空维度的几何效应或粒子物理学标准模型的超对称扩展所预测的新玻色子的交换,对称能的高密度行为也与短距离下可能的非牛顿引力密切相关。 然而,我们目前对核对称能的认识,特别是在超饱和密度下的认识是非常贫乏的。 我的工作的最终目标是通过NSF的资助,利用核反应,特别是由高能稀有同位素束引起的核反应,确定致密富中子核子物质的对称能,并研究其对天体物理学和宇宙学的影响。 为了实现这一目标,将研究张量力、短程核子-核子关联函数的同位旋依赖性和三体力的自旋-同位旋依赖性对核对称能高密度行为的影响及其在核反应和中子星中的表现。 拟议的活动将对增进我们不仅在核物理学而且在天体物理学和宇宙学方面的知识产生重大影响。 此外,PI将通过积极参与研究生和本科生开展拟议的研究,促进研究,教学,培训和学习的更紧密结合。 该项目将帮助学生更好地准备成为下一代科学家和工程师。 此外,该项目还将进一步改善德克萨斯州农工大学商业学院的研究和教育基础设施和条件。

项目成果

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Bao-An Li其他文献

Nucleon effective masses in neutron-rich matter
富中子物质中的核有效质量
Spin transport in intermediate-energy heavy-ion collisions as a probe of in-medium spin-orbit interactions
中能重离子碰撞中的自旋输运作为介质自旋轨道相互作用的探针
  • DOI:
    10.1016/j.nuclphysa.2016.06.001
  • 发表时间:
    2016
  • 期刊:
  • 影响因子:
    1.4
  • 作者:
    Yin Xia;Jun Xu;Bao-An Li;Wen-Qing Shen
  • 通讯作者:
    Wen-Qing Shen
Origins and impacts of high-density symmetry energy
  • DOI:
    10.1063/1.4984856
  • 发表时间:
    2016-10
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Bao-An Li
  • 通讯作者:
    Bao-An Li
Neutron-proton differential flow as a probe of isospin-dependence of the nuclear equation of state
  • DOI:
    10.1103/physrevlett.85.4221
  • 发表时间:
    2000-09
  • 期刊:
  • 影响因子:
    8.6
  • 作者:
    Bao-An Li
  • 通讯作者:
    Bao-An Li
Simulating spin dynamics with spin-dependent cross sections in heavy-ion collisions
使用重离子碰撞中自旋相关截面模拟自旋动力学
  • DOI:
    10.1103/physrevc.96.044618
  • 发表时间:
    2017-06
  • 期刊:
  • 影响因子:
    3.1
  • 作者:
    Yin Xia;Jun Xu;Bao-An Li;Wen-Qing Shen
  • 通讯作者:
    Wen-Qing Shen

Bao-An Li的其他文献

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{{ truncateString('Bao-An Li', 18)}}的其他基金

Physics & Astronomy Scholarships for Success (PASS)
物理
  • 批准号:
    1643567
  • 财政年份:
    2017
  • 资助金额:
    $ 17.1万
  • 项目类别:
    Standard Grant
Renewal of REU Site in Physics and Astronomy at Texas A&M University-Commerce
更新德克萨斯 A 物理和天文学 REU 站点
  • 批准号:
    1359409
  • 财政年份:
    2014
  • 资助金额:
    $ 17.1万
  • 项目类别:
    Continuing Grant
New REU Site: REU Program in Physics and Astronomy at Texas A&M University-Commerce
新的 REU 站点:德克萨斯 A 物理和天文学 REU 项目
  • 批准号:
    1062613
  • 财政年份:
    2011
  • 资助金额:
    $ 17.1万
  • 项目类别:
    Continuing Grant
RUI: Probing the Density and Momentum Dependence of the Nucleon Isovector Potential in Neutron-Rich Nuclear Matter with Heavy-Ion Reactions
RUI:利用重离子反应探索富中子核物质中核子等矢量势的密度和动量依赖性
  • 批准号:
    0757839
  • 财政年份:
    2008
  • 资助金额:
    $ 17.1万
  • 项目类别:
    Continuing Grant
Probing the Isospin Dependence of In-Medium Nuclear Effective Interactions at the Rare Isotope Accelerator
探讨稀有同位素加速器中介质核有效相互作用的同位旋依赖性
  • 批准号:
    0652548
  • 财政年份:
    2006
  • 资助金额:
    $ 17.1万
  • 项目类别:
    Continuing Grant
Probing the Isospin Dependence of In-Medium Nuclear Effective Interactions at the Rare Isotope Accelerator
探讨稀有同位素加速器中介质核有效相互作用的同位旋依赖性
  • 批准号:
    0456890
  • 财政年份:
    2005
  • 资助金额:
    $ 17.1万
  • 项目类别:
    Continuing Grant
RUI: Probing the Equation of State of Dense Neutron-Rich Matter with High Energy Radioactive Beams at Rare Isotope Accelerator (RIA)
RUI:在稀有同位素加速器 (RIA) 上用高能放射性束探测致密富中子物质的状态方程
  • 批准号:
    0354572
  • 财政年份:
    2004
  • 资助金额:
    $ 17.1万
  • 项目类别:
    Standard Grant
Transport Theory with Bose-Einstein Statistics for RHIC and Investigations of Novel Properties of Dense Neutron-Rich Matter
RHIC 的玻色-爱因斯坦统计输运理论和致密富中子物质的新特性研究
  • 批准号:
    0243571
  • 财政年份:
    2003
  • 资助金额:
    $ 17.1万
  • 项目类别:
    Standard Grant
Theoretical Study of Ultra-Relativistic Heavy-Ion Collisions at RHIC and Isospin Physics with Radioactive Beams
RHIC 超相对论重离子碰撞和放射性束同位旋物理的理论研究
  • 批准号:
    0088934
  • 财政年份:
    2000
  • 资助金额:
    $ 17.1万
  • 项目类别:
    Continuing Grant

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