Skyrme力参数化描述核反应特性

Skyrme force parametrization description nuclear reaction properties

通过格林函数方法以及核物质近似得到基于有效核力的中子微观光学势,并通过定域密度近似得到靶核为有限核的中子微观光学势。在此基础上通过符合饱和点的核物质性质、Landau参数、双满壳核的结合能和电荷半径,以及入射能量在100 MeV以下,中子与靶核质量数为24≤A≤209的核反应的总截面、去弹截面、弹性散射角分布和分析本领实验数据得到一套新的Skyrme力参数SkC。用得到的Skyrme力对入射能量在100 MeV以下,中子与裂变核反应的数据进行了预言,理论计算结果能够比较好地符合实验数据。

Background： The neutron microscopic optical potential is obtained by Green function method through nuclear matter approximation and local density approximation based on the effective Skyrme interaction. The presented Skyrme forces can not satisfactorily describe the nuclear reaction properties. Purpose： In the work, we propose a new set of Skyrme force parameterization of description nuclear reaction properties. Methods： The new Skyrme force parameterization is found by simultaneously fitting the characteristics of nuclear matter, the binding energy, charge radius, the neutron induced reaction cross sections and polarization data. These data include the total cross sections, nonelastic sections, elastic scattering angular distributions and analyzing powers for the target mass range 24≤A ≤209 with incident neutron energies below 100 MeV. Results： The obtained Skyrme force is used to predict the neutron-actinide reactions with incident energies below 100 MeV. It is found that the calculations can give a satisfactory description of the experimental data. Conclusion： These results suggest that the obtained Skyrme force parameterization can not only describe the ground state properties, but for some quantities in the nuclear reaction. So, the obtained Skyrme force parameterization can be used to predict those data for the stable or unstable target in the mass range 23 ≤A ≤239 with incident nucleon energies below 100 MeV.