作者：黄平^1,2, 万清³, 董文龙², 许诗朦², 但玉娟², 龚岚³, 黄秋^1,2

作者单位：1. 中测测试科技有限公司，四川 成都 610021;
2. 中国测试技术研究院，四川 成都 610021;
3. 四川中测辐射科技有限公司，四川 成都 610066

关键词：NaI辐射探测器;能量响应;周围剂量当量率;环境水平剂量仪;G(E)函数

摘要：

针对NaI辐射探测器存在光子能量响应不一致现象从而导致周围剂量当量率测量精度较低的问题，该文利用自主研制的一套基于NaI探测器的环境水平剂量仪，完成在电离辐射计量标准实验室的能谱测量，并结合能谱-剂量转换函数G(E)进行能量响应修正方法测试验证。实验测试的结果表明，自主研制的环境水平剂量仪能量响应(平均能量范围48 keV~1.25 MeV)优于±3.0%，剂量率线性范围(–4.60%~1.95%)，满足国际标准IEC 61017：2016技术指标能量响应(±30%)和剂量率线性范围(–15%~22%)的相关要求。

Research on energy response correction method for NaI radiation detector based on spectrum-dose conversion function
HUANG Ping^1,2, WAN Qing³, DONG Wenlong², XU Shimeng², DAN Yujuan², GONG Lan³, HUANG Qiu^1,2
1. China Testing Technology Co., Ltd., Chengdu 610021, China;
2. National Institute of Measurement and Testing Technology, Chengdu 610021, China;
3. Sichuan Zhongce Radiation Technology Co., Ltd., Chengdu 610066, China
Abstract: According to the inconsistency of the photon energy response of the NaI radiation detector, the accuracy of the ambient dose equivalent rate measurement is poor, so this article uses a self-developed set of environmental level dosimeter based on NaI detector to complete the spectrum measurement in the ionizing radiation standard laboratory, and combines the spectrum-dose conversion G(E) function method to correct the energy response for verification. Experimental test results show that the energy response (48 keV-1.25 MeV) of the environmental level dosimeter independently developed in this paper is better than ±3.0%, and the linear range of dose rate is from –4.60% to 1.95%, which meets the relevant technical parameters of the international standard IEC 61017:2016 of environmental radiation monitoring instruments: energy response (±30%), the linear range of dose rate from –15% to 22%.
Keywords: NaI radiation detector;energy response;ambient dose equivalent rate;environmental level dosimeter; G(E) function
2022, 48(2):124-128  收稿日期: 2021-07-31;收到修改稿日期: 2021-09-05
基金项目: 四川省科技计划资助(2020YFG0019)
作者简介: 黄平(1982-),男,四川成都市人,副研究员,博士,研究方向电离辐射计量学
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