辐射检测仪器时间响应修正方法验证与探讨  

Validation and discussion of the time response correction formula for radiation detectors

作　　者：张震[1] 练德幸[1] 侯长松[1] 张庆召[1] 徐辉[1] 朱卫国[1] 梁婧[1] 

机构地区：[1]中国疾病预防控制中心辐射防护与核安全医学所 辐射防护与核应急中国疾病预防控制中心重点实验室,北京100088

出　　处：《中华放射医学与防护杂志》2018年第1期48-51,共4页Chinese Journal of Radiological Medicine and Protection

摘　　要：目的 验证和探讨4种常用辐射检测仪器（6150AD6＋6150AD-b型剂量仪、FH40G＋FHZ672E-10型剂量仪、451P型电离室剂量仪和AT1123型剂量仪）的时间响应修正方法。方法 在X射线照射持续时间为500、200、100和50 ms情况下，记录仪器显示周围剂量当量率；根据电阻R和电容C串联电路（RC电路）的时间响应修正公式对数据进行时间响应修正。结果 AT1123型剂量仪测量值与照射持续时间没有相关性，其他3种剂量仪测量值随照射时间变化明显。结论 AT1123型剂量仪测量值可以不进行时间响应修正，其他3种剂量仪测量值可通过时间响应修正公式进行修正。Objective To validate and discuss the time response correction formula for four types of dosimeters （6150AD6＋6150AD-b, FH40G＋FHZ672E-10, 451P ionization chamber and AT1123）. Methods The ambient dose equivalent rates shown by survey meters were recorded separately when X-ray emission time was 500, 200, 100 and 50 ms.The corrected values were obtained by the formula of circuit having a capacitance C and asistance R in series. Results Therewas no correlation between the value measured by AT1123 dosimeter and the time of irradiation.The values by other three kinds of dosimeters obviously varied with the time of irradiation. Conclusions It is not required to make the time response correction for the measured value of AT1123 dosemeter, whereas the values measured by the other three dosimeters could be corrected by the time response correction formula.

关 键 词：时间响应 周围剂量当量率 修正公式 

分 类 号：R197.39[医药卫生—卫生事业管理]