原子能科学技术2025，Vol.59Issue(11)：2393-2399,7.DOI:10.7538/yzk.2025.youxian.0049
基于运动学重构鉴别12C+209Bi反应的8Be基态出射道
Identification for Ground-state 8Be in 12C+209Bi Reaction Based on Kinematic Reconstruction
摘要
Abstract
For heavy-ion nuclear reactions induced by the weakly-bound 6,7Li and tightly-bound 12C at near Coulomb-barrier energy region,plenty of α products have been detected experimentally in the early studies.However,the reaction mechanisms of heavy-ions in the near Coulomb-barrier energy region are complex.The origins of α particles still remain unsolved.For lighter projectiles such as 6,7Li,and 9Be,αparticles may originate from inelastic excitation followed by breakup process,or resonant states of projectile-like nuclei like 8Be populated by nucleon transfer.The subsequent breakup of 8Be poses a significant challenge for the experimental identification for 8Be.For tightly-bound nuclei like 12C,the situation is equally complex.Disentangling the sources of α particles and identifying the reaction mechanisms are essential for developing the low-energy heavy-ion reaction theory.However,due to the limitations of previous silicon detector technology,the kinematic coincidence measurements for the two breakup products were scare,particularly in the direct determination of the reaction channel(12C,8Be→2α).For identifying the ground state 8Be,the experiment using kinematic reconstruction method was carried out at the R60° nuclear reaction terminal of the Beijing HI-13 Tandem Accelerator at the China Institute of Atomic Energy.Two ∆E-E silicon-strip detector telescopes were used for a kinematic coincidence measurement of the two α breakup fragments from the projectile-like ground-state 8Be in the 12C+209Bi reaction.The experimental information of the relative energy Erel,opening angle θ12 and breakup direction angle β of the two α was kinematically reconstructed.The obtained results align well with the asymptotic breakup behavior of the long-lifetime ground-state 8Be.This study successfully reconstructed the properties of the long-lifetime breakup nucleus,providing groundwork for future investigation of the breakup of nuclei with short-lifetime and underlying reaction mechanisms.关键词
运动学符合测量/诱发破裂反应/渐近破裂Key words
kinematic coincidence measurement/induced breakup reaction/asymptotic breakup分类
核科学引用本文复制引用
傅凌逸,段海锐,祝颂娴,李志龙,黄志杰,尹诚,王浩睿,范泽睿,李慧艳,张焕乔,贾会明,林承键,杨磊,马南茹,杨峰,温培威,骆天鹏,常昶..基于运动学重构鉴别12C+209Bi反应的8Be基态出射道[J].原子能科学技术,2025,59(11):2393-2399,7.基金项目
国家重点研发计划(2023YFA1606402) （2023YFA1606402）
国家自然科学基金(12275360,U2167204,12175314,12235020) （12275360,U2167204,12175314,12235020）
稳定支持基础科研计划 （）
