摘要
为研究各因子对正比计数管探测低能X射线时性能的影响，利用MCNP5软件计算了不同光子能量下管内气体种类、气体压强及壁效应、放置距离等因素对探测器探测效率的响应情况。结果表明正比计数管探测器对10～30keV X射线探测效率最佳；且在探测低能x射线时，正比计数管应尽可能靠近源项，同时管内最佳气体压强在1．515x10^5～2．02，X10^5Pa之间。
To study the factors of proportional counter tube for detecting low - energy X ray, the MCNP5 was employed to calculate the response of gas type, gas pressure, wall effects and locations for different photon ener- gies detecting. The results show that the best detection efficiency obtained for X - ray within energy range of 10 -30 key and the optimum in - pipe gas pressure between 1.5x10^5 - 2.02 x 10^5 Pa. In order to measure higher detection efficiency, the detector should approach the source term as possible.
出处
《核电子学与探测技术》
CAS
北大核心
2016年第3期312-315,共4页
Nuclear Electronics & Detection Technology
关键词
正比计数管
低能X射线
MCNP5
探测效率
proportional tube detector
low energy X ray
MCNP5
detection efficiency
作者简介
张江云（1987-），男，四川平昌人，工程师，主要从事反应堆安全分析及运行研究。
