Nuclear symmetry energy from the Fermi-energy difference in nuclei
Nuclear symmetry energy from the Fermi-energy difference in nuclei
复制标题
来自原子核费米能差的核对称能
DOI：
10.1103/physrevc.87.034327
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发表时间：
2013-03
影响因子：
3.1
通讯作者：
Min Liu
中科院分区：
文献类型：
--
作者：
Ning Wang;Li Ou;Min Liu
用Skyrme能量密度泛函和核质量研究了几种幻核的中子质子费米能差及其与核子分离能的关联，用54个Skyrme参数集约束了次饱和密度下的核对称能.在亚饱和密度为0.11 fm$^{-3}$时，得到的核对称能为26.2 $\pm $1.0 MeV，不确定度为1.5 $\sigma$。进一步结合208 Pb的中子皮厚度，选取了斜率参数为28<L<65的10个Skyrme力来描述饱和密度附近的对称能。
The neutron-proton Fermi-energy difference and the correlation to nucleon separation energies for some magic nuclei are investigated with the Skyrme energy density functionals and nuclear masses, with which the nuclear symmetry energy at sub-saturation densities is constrained from 54 Skyrme parameter sets. The extracted nuclear symmetry energy at sub-saturation density of 0.11 fm$^{-3}$ is 26.2 $\pm$ 1.0 MeV with 1.5 $\sigma$ uncertainty. By further combining the neutron-skin thickness of 208Pb, ten Skyrme forces with slope parameter of 28<L<65 are selected for the description of the symmetry energy around saturation densities.