CTLD-J4000型能量鉴别式个人剂量计的剂量学实验研究

目的 了解能量鉴别式剂量计的剂量学性能。方法 选用个人剂量检测机构使用较多的一类能量鉴别式剂量计（CTLD-J4000型）进行一系列线性标准曲线、平均光子辐射能量和入射角的相对响应的研究分析其剂量学性能，并使用能量鉴别剂量计进行能量鉴别研究。结果 CTLD-J4000型能量鉴别剂量计线性相关性较好、平均光子辐射能量响应偏差±20％以内，入射角的相对响应偏差最大为10％，利用厂家给出的能量鉴别参考值在一定程度上可以实现能量鉴别的需求。结论 对于相同能量下照射不同剂量值和相同能量相同剂量照射不同角度的情况厂家给出的参考值与实际测量值存在一定的不一致的问题，尚需要通过进一步的实验找出不同剂量值和照射角度影响测量结果的规律。

Experimental study of dosimetry for CTLD-J4000 energy differential type personal dosimeter

Objective To understand the dosimetric performance of energy differential type dosimeter. Methods A differential type dosimeter (CTLD-J4000) was chosed to conduct a series of dosimetric performance tests, including linear standard curves, relative response to mean photon radiation energy and incidence angle. Results The linear correlation of CTLD-J4000 energy differential dosimeter was good, with the average photon radiation energy response deviation within ±20% and the maximum incidence angle response deviation of 10%. The energy identification could be achieved according to the energy reference value provided by the manufacturer to a certain extent. Conclusions Further experiments are needed to find out the factors influencing measurement result from different dose values and incidence angles.