符合计数法测量宇生μ子的通量

Measuring cosmic muon flux by coincidence counting

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.