组织等效空腔电离室设计与饱和特性研究  

Design and saturation characteristics of tissue-equivalent cavity ionization chamber

作　　者：程松[1] 刘伯学[1] 唐开勇[1] 刘虹宇[1] 王艳春[1] 

机构地区：[1]北京防化研究院,北京102205

出　　处：《核技术》2007年第10期860-863,共4页Nuclear Techniques

摘　　要：MOS场效应管与空腔电离室两种技术结合,形成一种用于个人核辐射剂量监测的新型探测器-直接电荷存贮(Direct Ion Storage,简称DIS)探测器。本文在介绍该探测器原理基础上,从壁材料、气体成分、腔体形状和尺寸、壁厚度以及绝缘材料等角度,设计与研制组织等效空腔电离室。利用60Coγ辐射源和中能X射线,测试了电离室饱和特性,很好的满足DIS探测器对电离室饱和特性的要求。A direct ion storage （DIS） detector integrates MOS field effect transistor with cavity ionization chamber and is used for monitoring personnel dose. As part of our efforts to develop DIS detector, we report in this paper a tissue-equivalent cavity ionization chamber, including the wall material, gas composition, shape and size of cavity, wall thickness and insulated material. Using ^60Co λ,-rays and 70-180 keV X-rays, the test results show that saturation characteristics of the cavity ionization chamber meet the requirement of DIS detector.

关 键 词：直接电荷存贮探测器 组织等效空腔电离室 MOS场效应管 饱和特性曲线 

分 类 号：TL7[核科学技术—辐射防护及环境保护] TL8