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 29-38 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.
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 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 208Pb are obtained. For all effective interactions, a linear relation between the symmetry energy at saturation point and the neutron skin thickness for 208Pb is observed.
参考文献
| [1] | @@Meng J,@@ Ring P.$$ Phys Rev Lett,** 1996,)) 77:&& 3 963; |
| [2] | Lalazissis G A, Knig J, Ring P. Phys Rev, 1997, C55: 540. |
| [3] | Meng J, Ring P. Phys Rev Lett, 1998, 80: 460. |
| [4] | Typel S, Brown B A. Phys Rev, 2001, C64: 027302. |
| [5] | Ring P. Prog Part Nucl Phys, 1996, 37: 193. |
| [6] | Horowitz C J, Piekarewicz J. Phys Rev Lett , 2001, 86: 5 647. |
| [7] | Long W H, Meng J, Giai N V, et al. Phys Rev, 2004, C69: 034319. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%