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原子核物理评论 , 2014, (3): 273-284. doi: 10.11804/NuclPhysRev.31.03.273

对称能研究进展

陈列文 1,

1.

基金项目:   “Shu Guang” project supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation   Science and Technology Commission of Shanghai Municipality (11DZ2260700)@@@@基金项目:国家自然科学基金(11135011,11275125)；上海市“启明星计划(跟踪)”(11QH1401100)；上海市“曙光计划”；上海市“东方学者”，上海市科委(11DZ2260700)   National Natural Science Foundation of China(11135011,11275125)   Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning   Shanghai Rising-Star Program(11QH1401100)  

关键词： 对称能 , 非对称核物质状态方程 , 核反应 , 核结构 , 中子星

Recent Progress on the Determination of the Symmetry Energy

Keywords： symmetry energy , equation of state for asymmetric nuclear matter , nuclear reaction , nuclear structure , neutron star

总结了目前基于分析地面实验室以及天文观测数据所得到的关于核物质对称能密度相关性的约束。结果表明，在核物质饱和密度ρ0处，关于对称能的大小Esym (ρ0)及其密度梯度参数L的不同具体约束强烈地依赖于不同的实验数据或理论方法。另一方面，所有存在的约束都和Esym(ρ0)=(32.5±2.5) MeV以及L=(55±25) MeV一致。如何确定核物质对称能的高密行为仍然是一个挑战。

We summarize the current available constraints on the density dependence of the symmetry energy obtained from terrestrial laboratory measurements and astrophysical observations. While the magnitude Esym(ρ0) and density slope L of the symmetry energy at saturation density ρ0 can vary largely depending on the data or analysis methods, all the available constraints are in agreement with Esym(ρ0)=(32.5 ± 2.5) MeV and L=(55 ± 25) MeV. The determination of the high density behaviors of the symmetry energy remains a big challenge.

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