符合计数法测量宇生μ子的通量  

Measuring cosmic muon flux by coincidence counting

作　　者：林海星 宁云松 陈羽 唐健 LIN Hai-xing;NING Yun-song;CHEN Yu;TANG Jian(School of Physics, Sun Yat-Sen University, Guangzhou 510275, China)

机构地区：[1]中山大学物理学院,广东广州510275

出　　处：《物理实验》2021年第2期16-21,共6页Physics Experimentation

基　　金：中山大学物理学“国家基础科学人才培养基地”本科生科研项目(No.J1210034);中山大学校级大学生创新训练计划项目(No.20201319)。

摘　　要：搭建了宇生μ子探测器,采用符合计数法测量了宇生μ子通量和空间分布.探讨了甄别器阈值标定、宇生μ子计数率与工作电压的关系、塑料闪烁体板间间距对计数率的影响.通过改进测量装置的几何结构,研究了宇生μ子空间角的分布情况,验证了宇生μ子计数率与探测器摆放天顶角呈cos2θ关系.A cosmic muon detector based on two plastic scintillators was built,and cosmic muon flux and spatial distribution were measured by coincidence counting method.The threshold calibration of the data acquisition system was carried out,and the relationship between the cosmic muon counting rate and the operating voltage was obtained.The influence of the distance between plastic scintillator plates was discussed.By improving the geometrical structure of the measuring device,the angular distribution of cosmic muons was studied,and the relationship between the cosmic muon counting rate and the zenith angle of the detector was proved to be cos2θ.

关 键 词：宇生μ子 Μ子探测器 符合计数法 甄别器 

分 类 号：O572[理学—粒子物理与原子核物理]