^(10)Be中子谱因子的实验研究  

Measurement of the Neutron Spectroscopic Factor in ^(10)Be

作　　者：李二涛 李志宏[2] 李云居[2] 郭冰[2] 颜胜权[2] 苏俊[2] 曾晟[2] 王友宝[2] 连钢[2] 刘建成[2] 甘林[2] 樊启文[2] 李鑫悦 苏毅 马田丽 罗奇 胡世鹏 郝昕 孙慧斌 谌阳平 周勇[2] 韩治宇 裴常进 柳卫平[2] 

机构地区：[1]深圳大学物理与能源学院,广东深圳518060 [2]中国原子能科学研究院核物理研究所,北京102413

出　　处：《原子核物理评论》2017年第3期446-449,共4页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(11505117;11490560;11475264;11321064;11375269;11605114);国家重点基础研究发展计划(973计划)项目(2013CB834406);国家重点研发计划项目(2016YFA0400502);广东省自然科学基金资助项目(2015A030310012;2016A030310042)~~

摘　　要：核谱因子描述了单粒子轨道中核子的占有状态,在核结构和核天体物理中有重要的应用。目前国际上10Be中子谱因子的研究结果存在3倍左右的差异。本实验利用中国原子能科学研究院HI-13串列加速器的高灵敏度Q3D磁谱仪,对^(13)C(~9Be,^(10)Be)^(12)C反应角分布进行了精确测量。通过实验数据和扭曲波玻恩近似(DWBA)计算结果进行比较,导出了^(10)Be的中子谱因子。该结果与转动不变壳模型理论及曾敏尔等的评价结果基本一致。利用该结果可以得到~9Be(n,γ)^(10)Be的天体物理反应率,评价该反应在相关天体环境中对CNO循环种子核^(12)C的影响,为核结构和核天体物理提供可靠数据。Spectroscopic factor describes the overlap between the initial and final states and gives some information on the occupancy of a given single-particle orbiting around nuclear. It plays an important role in a variety of topics on nuclear structure and nuclear astrophysics. Nowadays, several experiments have been performed to study the neutron spectroscopic factor of10^ Be, but the results have a big difference with each other.In order to clarify this discrepancy, new measurement is highly needed. In this work, the angular distribution of13^ C9 ^Be,10^Be12^C reaction was measured at the Q3 D magnetic spectrometer of the HI-13 tandem accelerator,China Institute of Atomic Energy, Beijing. And then, the neutron spectroscopic factor of10^ Be was derived by normalizing the calculational differential cross-sections with the distorted-wave Born approximation to the experimental data. The present value is in good agreement with that obtained by Tsang et al. and also in good agreement with that derived from translationary invariant shell model calculation. One can use this result to calculate the9 ^Be（n, γ）0^ Be reaction rates and calculate its influence to the production of12^C.

关 键 词：扭曲波玻恩近似 中子谱因子 Q3D磁谱仪 

分 类 号：O571.416[理学—粒子物理与原子核物理]