准4π空间α探测器的研制  

Study on α-detector in quasi-4π space

作　　者：杜在林 张奎平[3] 亢俊健[4,2] 杨春晖[5] 

机构地区：[1]河北省科技型中小企业技术创新资金管理中心,河北石家庄050021 [2]河北省光电信息与地球探测技术重点实验室,河北石家庄050031 [3]中国矿业大学机电与信息工程学院,北京100083 [4]石家庄经济学院光电技术研究所,河北石家庄050031 [5]方圆电子音像出版社,河北石家庄050061

出　　处：《河北科技大学学报》2009年第3期212-214,共3页Journal of Hebei University of Science and Technology

基　　金：河北省科技攻关项目(02213508D);河北省光电信息与地球探测技术重点实验室项目

摘　　要：利用一种可带静电的塑料薄膜收集氡子体,然后测量其放射性活度浓度。为了提高测试精度首先设计了双光电倍增管或双金硅面垒对接结构,对取样塑料薄膜进行双面测试,而且光电倍增管面积相对塑料薄膜要足够大,距离尽可能的小,α粒子穿透率较高(实际穿透率达到89%),从而可将呈球面辐射的α粒子转换为电脉冲,实现高精度α粒子计数测量。实验结果表明:基于该探测器的测氡仪器具有体积小,成本低,灵敏度高,操作简单,测试速度快等优点。A kind of charged plastic membrane is used for collecting Radon daughters. And then the plastic membrane＇s radioactive activity concentration was measured by a detector. For improving test precision, a construction with double photomultiplier tube or double gold silicon surface was introduced. And a double-side test for the sampling plastic membrane was presen- ted by the construction. The key technique to consider is whether the area of sensor is big enough, the distance of butt contact is short enough and the sampling plastic membrane is thin enough （with the actual penetration rate 89% to a particles）, thus we can transform all the energy of a particles that are radiating towards 4π space into electro pulse randomly, and realize highprecision counting for a particles. The detector has the advantages of small size,low cost,high sensitivity, simple operation and high test speed.

关 键 词：核物探 测氡 准4π空间 α探测仪 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]