利用MCNP程序对充气电离室探测性能的研究  

Study on detection performances of a gas ion-chamber using MCNP code

作　　者：谈春明[1] 

机构地区：[1]清华大学核能技术设计研究院,北京100084

出　　处：《核电子学与探测技术》2003年第3期236-239,共4页Nuclear Electronics & Detection Technology

摘　　要：利用MCNP程序研究了充气电离室的探测性能,计算了探测器内工作气体和电极片在射线探测中各自的作用,得到该电离室的探测效率。然后计算不同偏角入射时探测器的信号输出值,并给出计算的探测灵敏度。计算结果表明,高压充气电离室探测60Co源γ射线也可达到高的探测效率和灵敏度。In this paper, the MCNP code is used to study the detection performances of a gas ionchamber. Firstly, the interaction of working gas and electrode plane to γ rayis calculated, and then the detection efficiency is obtained. Then output signal values of a simulation detactor under different angle of incident ray, as weel as detection sensitivity, are given too. According to the calculating results of MCNP code, high pressure gas ionchamber can reach high detection efficiency and sensitivity to 60Co γray.

关 键 词：MCNP程序 充气电离室 探测性能 探测器 探测效率 灵敏度 钴60辐射成像检查系统 

分 类 号：TL811.1[核科学技术—核技术及应用]