光致荧光剂量计β辐照器的研制及性能研究
Development and Performance of β Irradiator for OSLD
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摘要: 本文针对空间辐射、核动力远洋、核应急等特殊环境下个人及环境剂量监测量值无法实时校准的问题，研制了一种便携式的β辐照器，可携带至现场对光致荧光剂量计（OSLD）进行校准，为特殊环境下剂量监测的准确性提供计量保障。β辐照器采用可替换的90Sr-90Y平面电镀源作为校准源，并可溯源至标准β辐射场，通过电磁阀控制辐照动作，其总质量小于3 kg。研究结果表明：β辐照器周围剂量当量率处于环境水平；参考点平均剂量率为0.060~0.083 mGy/s，其相对标准不确定度为6.9%；辐照剂量重复性为3.9%（n=10）。Abstract: In this paper, in view of the problem that the individual and environmental dose monitoring measurements cannot be calibrated in real time under special environments such as space radiation, nuclear power ocean and nuclear emergency, a portable β irradiator was developed, which could be carried to the site to calibrate the optically stimulated luminescence dosimeter (OSLD), and provide measurement guarantee for the accuracy of dose monitoring in special environment. The β irradiator uses a replaceable 90Sr-90Y flat plating source as a calibration source and can be traced back to the standard β radiation field. The irradiation action can be controlled through solenoid valve, and the total mass of β irradiator is less than 3 kg. The results show that the dose equivalent rate around β irradiator is at the ambient level, the average dose rate of the reference point is 0.060-0.083 mGy/s, the relative standard uncertainty is 6.9%, and the repeatability of irradiation dose is 3.9% (n=10).
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