【作者】 沈刚； 李俊； Hillhouse G．C．； 孟杰；

【Author】 SHEN Gang, LI Jun, Hillhouse G. C., MENG Jie (Center of Theoretical Nuclear Physics, National Laboratory of Heavey Ion Accelerator of Lanzhou, Lanzhou 730000, China; School of Physics, Peking University, Beijing 100871, China; Department of Physics, University of Stellenbosch, Stellenbosch, South Africa)

【机构】 兰州重离子加速器国家实验室原子核理论中心； Department of Physics,University of Stellenbosch,Stellenbosch,South Africa；

【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PKl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29-38 MeV以及相应的208Pb中子皮厚度为0．17-0.28 fm．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．更多还原

【Abstract】 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 208Pb are studied. Using the new effective interaction PK1, together with NL3, S271 and 2271, 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 208Pb 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.更多还原