利用12C+96Zr弹性散射角分布研究96Zr的中子皮

Study on Neutron Skin of 96Zr by Using Angular Distribution of 12C+96Zr Elastic Scattering

中子皮是原子核的关键物理参数之一,对非对称核物质状态方程有重要的约束作用。本工作主要利用12C+^96Zr弹性散射角分布研究96Zr的中子皮,首先采用Woods-Saxon势,通过改变实部势参数得到与实验数据拟合最优的1组光学势参数,然后利用双折叠势模型(DFM)计算96Zr在不同中子密度分布下与12C的相互作用势,通过比较两组相互作用势,找出与最佳光学势对应的96Zr核的中子分布均方根半径,从而得到96Zr的中子皮厚度为0.087 fm,此结果与其他研究结果在误差范围内符合很好。

Neutron skin is one of the key parameters in nuclei. It can be used to constrain the asymmetric nuclear matter equation of state. The 96Zr neutron skin with the angular distribution of 12C+^96Zr elastic scattering was studied. The best fitting optical potential parameters were figured out by comparing the experimental angular distribution of 12C+^96Zr elastic scattering with the results calculated with Woods-Saxon potential. A series of optical potentials were computed with double folding potential model(DFM) by using different neutron density distributions in 96Zr. The neutron density distribution and the thickness of neutron skin in 96Zr were studied by comparison of the two sets of optical potentials. The thickness of 96Zr neutron skin was deduced to be 0.087 fm, and the result is in agreement with that of other work.