【摘要】 为满足核电站运行、同位素生产、放射性治疗等辐照环境的α、β和γ的放射性污染测量,本研究设计了一种手持式低功耗多功能辐射监测仪,其探测装置由两个φ30mm的Zn S(Ag)塑料闪烁体、光电倍增管、G-M计数管等组成。探测装置测量窗口直径为30mm,放置有厚度为2.4m的钛膜,可分别进行α、β放射性污染测量,同时内置计数管可实现对由γ干扰引起α、β放射性测量误差的修正。经实验验证,G-M计数管对γ射线的测量相对误差为9.432%,对α粒子的2π探测效率为32.02%,对β粒子的2π探测效率为32.33%,结果表明本研究设计的多功能辐射监测仪具有较好的α、β和γ探测性能。更多还原

【Abstract】 In order to meet the measurement of α、β、γ radioactive contamination in irradiated environments such as nuclear power plant operation,isotope production,and radiation therapy,a handheld multifunctional radiation monitor was designed in this study.It consists of scintillator,photomultiplier tube,G-M counter,etc.The diameter of measurement window of detector is 30 mm,which can be used to measure α,β radioactive pollution.At the same time,the buil-in G-M counter tube can correct α and β radioactive errors caused by y.After experimental verification,the relative measurement error for γ measurement by G-M counter is 9.432%.he detection efficiency fora is 32.02 %,the detection efficiency for β is 32.33 %.the results show thatα、β、γ detection is good for the multifunctional radiation monitor designed in this study.更多还原