用于测量放射性气溶胶β射线的Phoswich探测器的蒙特卡罗模拟  

M-C simulation of Phoswich detector for measuring β-rays in radioactive aerosol

作　　者：孙发力[1,2] 夏晓彬[1] 张志宏[1,2] 吕晓雯[1,2] 

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院研究生院,北京100049

出　　处：《核技术》2011年第8期594-598,共5页Nuclear Techniques

摘　　要：描述了用于β放射性气溶胶放射性活度测量的Phoswich探测器的蒙特卡罗模拟。Phoswich探测器由塑料闪烁体和BGO无机闪烁体组成,应用Geant4蒙特卡罗程序,对不同入射粒子在塑料闪烁体和BGO内的能量沉积与衰减特性进行了数值模拟计算,去除α射线和γ光子的影响后,得到能用于放射性气溶胶的β放射性活度测量的Phoswich探测器主要部件的结构和尺寸。In this study,Monte Carlo simulation was performed on a Poshwich detector for measuring radioactivity of β particles in radioactive aerosol.The detector model consists of plastic scintillator and BGO crystal,with aluminum foil in the front to stop α particles and considerations to prevent the γ-rays from affecting the β-ray detection.Code Geant4 was used to calculate the energy deposition in the scintillators and their attenuation coefficient,The size and the structure of the detector ware determined based on the simulation.

关 键 词：GEANT4 放射性气溶胶 射程 塑料闪烁体 BGO PHOSWICH 

分 类 号：TL816.2[核科学技术—核技术及应用]