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

作　　者：杨赟 温培威 林承键 贾会明 杨磊 马南茹 杨峰 洛天鹏 莫腾欢 常昶 段海锐 张明昊 黄志杰 尹诚 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(College of Physics and Technology&Guangxi Key Laboratory of Nuclear Physics and Technology,Guangxi Normal University,Guilin 541004,China;China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]College of Physics and Technology&Guangxi Key Laboratory of Nuclear Physics and Technology,Guangxi Normal University,Guilin 541004,China [2]China Institute of Atomic Energy,Beijing 102413,China

出　　处：《Chinese Physics C》2023年第12期115-123,共9页中国物理C（英文版）

基　　金：This study is supported by the National Key R&D Program of China(2022YFA1602302);the National Natural Science Foundation of China(12235020,12275360,12175314,12175313,U2167204);the Continuous Basic Scientific Research Project(WDJC-2019-13);the Leading Innovation Project(LC192209000701,LC202309000201);the project supported by the Director's Foundation of Department of Nuclear Physics,China Institute of Atomic Energy(12SZJJ-202305);the Young Talent Development Foundation(YC212212000101)。

摘　　要：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.

关 键 词：reduced strong absorption distance Coulomb barrier radius Coulomb barrier height tightly bound nuclei weakly bound nuclei halo nuclei 

分 类 号：O571[理学—粒子物理与原子核物理]