α屏栅电离室谱仪系统的研制  

Development of an α grid ionization chamber

作　　者：杨璐[1] 金余恒[1] 陈玉华[1] 陈雁南[1] 张素经[1] 

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《核电子学与探测技术》2006年第3期331-334,共4页Nuclear Electronics & Detection Technology

摘　　要：介绍用于α放射性活度测量的平行板屏栅电离室谱仪系统。设计了一套带独立真空系统的屏栅电离室。该谱仪系统由三部分组成，电离室主体、充气系统及电子学系统。能量分辨率对于^239Pu源可达25keV，在4～6MeV能区本底计数率为4h^-1,探测效率接近50%。该谱仪系统可以测量核素的α射线能量，分析出它们的能谱结构，进而鉴定出各个α能谱所相应的核素及其相对含量和绝对含量。The article introduces the parallel grid ionization chamber used to measure the α radioactivity, which has a independent vacuum system. The system is composed of main body of the chamber, gas-filled and electronics system. Energy resolution is 25keV for ^239Pu, background is 4 counts for one hour from 4MeV to 6MeV energy range, detect efficiency approach to 50 ~. The chamber can measure the energy of nuclide,analyze the structure,moreover authenticate both the nuclide and the relative and absolute content.

关 键 词：屏栅电离室 环境样品 平行板 能量分辨率 低水平测量 

分 类 号：TL81[核科学技术—核技术及应用]