近日，广西师范大学物理与技术学院的Yun Yang及其研究团队取得一项新进展。经过不懈努力，他们实现弹性散射中强吸收距离和库仑势垒的系统提取。相关研究成果已于2023年12月15日在国际知名学术期刊《中国物理C》上发表。

该研究团队从一系列实验弹性散射角分布中提取了四分之一点配方，得到了约化后的强吸收距离d_S和库仑势垒高度V_B。研究人员系统地研究了具有不同结合能的原子核作为抛射体，包括紧束缚原子核、弱束缚原子核和晕原子核。他们发现，在晕核中，d_S与靶的结合能和性质有关，表现出复杂的特性。

此外，研究人员利用约化距离与系统尺寸的线性关系，可以估计从聚变反应中难以得到的库仑势垒半径R_B。关于库仑参数z的V_B规则与从聚变反应中提取的其他理论势垒定律是一致的。他们进一步阐明了结合能或变形对V_B随z的线性关系影响不大的原因。

附：英文原文

Title: Systematic extraction of the strong absorption distance and Coulomb barrier from elastic scattering

Author: Yun Yang, Pei-Wei Wen, Cheng-Jian Lin, Hui-Ming Jia, Lei Yang, Nan-Ru Ma, Feng Yang, Tian-Peng Luo, Teng-Huan Mo, Chang Chang, Hai-Rui Duan, Ming-Hao Zhang, Zhi-Jie Huang, Cheng Yin

Issue&Volume: 2023-12-15

Abstract: The reduced strong absorption distance d_S and Coulomb barrier height V_B are extracted from the quarter-point recipe from a series of experimental elastic scattering angle distributions. The nuclei with different binding energies are systematically studied as the projectile, including the tightly bound, weakly bound, and halo nuclei. It is found that the mean d_S for halo nuclei is significantly larger than that of tightly and weakly bound nuclei. The complex behavior of d_S regarding the binding energy and properties of the target is observed for halo nuclei. The linear relationship of the reduced distance with system size may be used to estimate the Coulomb barrier radius R_B, which is difficult to obtain from fusion reactions. The rule of V_B concerning the Coulomb parameter z is in agreement with other theoretical barrier laws extracted from the fusion reaction. Furthermore, the reason why the binding energy or deformation has little effect on the linear relationship of V_B as a function of z is clarified.

DOI: 10.1088/1674-1137/acf7b8

Source: http://hepnp.ihep.ac.cn/article/doi/10.1088/1674-1137/acf7b8