摘要
在现有的平均场模型中引入同位旋相关的高阶修正项, 研究了核物质对称能的密度依赖性和208Pb的中子皮厚度。采用新提出的PK1相互作用以及NL3, S271和Z271相互作用, 得到核物质饱和点对称能的范围为 29—38MeV以及相应的208Pb中子皮厚度为 0. 17— 0. 28fm. 在所有相互作用中, 核物质饱和点的对称能与208Pb的中子皮厚度近似呈线性关系.
After adding isospin dependent high order correction terms to existing relativistic mean field models (RMF), the density dependence of symmetry energy and the neutron skin thickness S for ^(208)Pb are studied. Using the new effective interaction PK1, together with NL3, S271 and Z271, a range of 29—38 MeV for the symmetry energy for nuclear matter at saturation point and the corresponding neutron skin thickness S = 0.14—0.28 fm for ^(208)Pb are obtained. For all effective interactions, a linear relation between the symmetry energy at saturation point and the neutron skin thickness for ^(208)Pb is observed.
出处
《原子核物理评论》
CAS
CSCD
北大核心
2005年第1期32-33,46,共3页
Nuclear Physics Review
基金
国家重点基础研究发展规划资助项目(G2000077407)
国家自然科学基金资助项目(1002522
10221003
10047001)~~
