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目的:为保证辐射受照人员个人剂量监测数据的准确可靠,研究非鉴别式热释光个人剂量计(GR-200A型LiF:Mg,Cu,P探测器片+BR4000A型剂量计盒)对不同能量射线响应,探讨其皮下10 mm剂量Hp(10)、皮肤剂量Hp(0.07)与射线能量之间的相互关系。方法:依据标准JJG593-2006,将已筛选退火后的探测器片放于剂量计盒的Hp(10)、Hp(0.07)位置,在标准计量学实验室将装好的剂量计置于有机玻璃平衡板中,分别予以不同剂量γ射线照射和不同能量窄谱过滤X射线照射,对照探测器读数比值Hp(0.07)/Hp(10)与能量的关系,寻找其相互关系的规律。结果:不同剂量γ射线照射和不同能量窄谱过滤X射线照射,Hp(0.07)/Hp(10)探测器计数之比与能量的关系具有显著统计学意义。结论:应用BR4000A型剂量计Hp(0.07)/Hp(10)探测器计数的比值,能够对受照人员所受照射从射线性质、能量范围和照射剂量上给出更为确切和详细的资料,从而为放射工作人员个人健康监护以及核与辐射事故受辐照人员临床诊疗提供参考依据,同时为实验室间比对提供技术方法。
Objective: In order to ensure the accuracy and reliability of individual dose monitoring data for irradiated workers, the study of the effect of different non-discriminating TLM personal dosimeters (GR-200A LiF: Mg, Cu, P detector tablets and BR4000A dosimeter boxes) Energy ray response to explore the subcutaneous 10 mm dose Hp (10), skin dose Hp (0.07) and the relationship between the energy of the beam. METHODS: According to the standard JJG593-2006, the screening and annealing probe was put in the Hp (10) and Hp (0.07) of the dosimeter box, and the dosimeter installed in the standard metrological laboratory was placed in the plexiglass Balance plate, respectively, with different doses of γ-ray irradiation and different energy narrow-spectrum filtered X-ray irradiation, control the detector reading ratio Hp (0.07) / Hp (10) and the energy relationship, looking for the relationship between the law. Results: The relationship between the ratio of Hp (0.07) / Hp (10) detector energy and energy was significantly different with different doses of γ-ray irradiation and narrow-band X-ray irradiation with different energy. CONCLUSIONS: Using the ratio of the Hp (0.07) / Hp (10) detector counts of the BR4000A dosimeter, more accurate and detailed information can be given from the radiation properties, energy range and exposure dose to exposed personnel, Thus providing a reference for the personal health supervision of radiation workers and the clinical diagnosis and treatment of exposed personnel for nuclear and radiation accidents and providing technical methods for comparison between laboratories.