眼晶体、指环剂量计的部分剂量学性能实验测试研究

Experimental research on partial dosimetric performance for eye lens dosimeter and ring dosimeter

目的比较国产与进口眼晶体、指环剂量计的部分性能测试结果,掌握眼晶体、指环剂量计的部分剂量学性能指标。方法依据IEC 62387—2012和GBZ 128—2019中性能要求,分别使用国产和进口热释光探测器开展了眼晶体剂量计和指环剂量计在光子响应下的性能对比实验;测试进口眼晶体和指环剂量计在相同照射条件下照射2次的剂量响应偏差;测试进口指环剂量计和国产指环剂量计在相同照射条件下的线性响应区别。结果在眼晶体和指环剂量计中分别使用国产热释光探测器和进口热释光探测器照射相同剂量,线性相关系数均满足R^(2)>0.999;进口眼晶体剂量计和指环剂量计2次照射相同剂量的响应偏差最大值均小于10.0%。两种进口指环剂量计和一种国产指环剂量计照射相同剂量线性相关系数均满足R^(2)>0.99。结论国产探测器和进口探测器均能满足监测需要;进口指环剂量计和国产指环剂量计线性响应区别不明显;进口眼晶体剂量计和进口指环剂量计重复性满足剂量计的性能要求。

Objective To compare the test results of domestic and imported eye lens and ring dosimeters,and master some dosimetric performance indexes of eye lens and ring dosimeters.Methods According to IEC 62387—2012 and GBZ128—2019,the performance of the eye lens dosimeters and ring dosimeters with the domestic thermoluminescence detectors were compared with the imported thermoluminescence detectors in photon response.The dose response deviation of the imported eye lens dosimeter and imported ring dosimeter was studied under the same irradiation condition.The difference of linear response between imported ring dosimeter and domestic ring dosimeter was studied under the same irradiation condition.Results The same dose was irradiated to domestic and imported thermoluminescence detectors in the imported eye lens and imported ring dosimeters,and the linear correlation coefficient all met R^(2)>0.999.The maximum response deviation of the imported eye lens dosimeter and ring dosimeter was less than 10.0%for the same dose.Two kinds of imported ring dosimeters and one kind of domestic ring dosimeter were irradiated with the same dose,and the linear correlation coefficient all met R^(2)>0.99.Conclusion Both domestic detectors and imported detectors can meet the needs of monitoring requirements.There was no obvious difference in linear response between imported ring dosimeter and domestic ring dosimeter.The repeatability of imported eye lens dosimeter and imported ring dosimeter met the performance requirements of the dosimeter.