材料期刊网

核对称能的密度依赖性对于原子核物理和天体物理中的许多问题很重要.基于密度依赖的结团模型,奇特的结团放射性被用来约束核对称能及其斜率的大小.在密度依赖的结团模型中,清楚地给出了结团放射性子核208pb的中子皮大小与对称能的斜率参数L(ρ0)之间的关联.发现从M3Y核子-核子相互作用得到的结团-208pb同位旋矢量势对于对称能的斜率参数L(ρ0)非常重要.基于结团放射性实验数据和新的208pb的中子皮大小实验数据,成功得到对称能的斜率参数L(ρ0)的大小.也讨论了利用质子放射性数据提取的斜率参数L(ρ0).

The density-dependence of symmetry energy is of particular importance to many problems in nuclear physics and astrophysics.Exotic cluster radioactivity is proposed to constrain the density slope of symmetry energy L(ρ0) by using the density-dependent cluster model (DDCM) where the cluster radioactivity serves as a link between the neutron skin thickness of 20spb and the density slope L(ρ0).The isovector part of cluster-20sPb potential constructed from the M3Y nucleon-nucleon interaction is found to be very important in determining the density slope parameter L(ρ0).The correlation between the neutron skin thickness of 208pb and the density slope parameter are obtained from cluster radioactivities around 208pb with measured data.The constraint of L(ρ0) from proton radioactivity is also discussed.