一种基于薄塑料闪烁体探测器的定向剂量当量率监测仪研制

基于薄塑料闪烁体探测器,采用MC模拟优化了定向剂量当量率监测仪探头组合结构。研制的用于弱贯穿辐射监测的定向剂量当量率仪,在10 μSv/h～100 mSv/h范围内,相对固有误差＜± 6%;⁸⁵Kr的β辐射场中,-60°～60°范围内角度响应好于± 40%;β辐射平均能量在60 keV～800 keV内,能量响应变化在-24%～49%范围内;变异系数小于2%。实验测量结果表明,该定向剂量当量率仪辐射性能满足GB/T 4835.1—2012要求。

Development of a directional dose equivalent rate monitorbased on thin plastic scintillation detector

Based on the thin plastic scintillation detector,MC simulation was used to optimize the probe combination structure of directional dose equivalent rate monitor. A directional dose equivalent rate instrument for monitoring weak penetration radiation was developed. In the range of 10 μSv/h to 100 mSv/h, the relative inherent error is less than ±6%. In the beta radiation field of ⁸⁵Kr, the angle response of -60° to 60° is better than that of ±40%. The average energy of beta radiation is in the range of 60 keV to 800 keV,and the energy response varies from -24% to 49%. The coefficient of variation is less than 2%. The experimental results show that the radiation performance of the directional dose equivalent rate instrument meets the requirements of GB/T 4835.1—2012.