X射线环境水平标准装置的研究与建立

The establishment of x-ray environmental standard calibration quality

目的:按照国际标准化组织(ISO)技术规范及我国现行国家标准的相关要求,在国家二级标准剂量学实验室建立用于校准X射线环境水平剂量仪的标准装置。方法:通过标准剂量仪测量不同附加过滤后的X射线束的衰减,测定标准辐射场常用的半值层及空气比释动能率,确定环境水平X射线辐射线质的有效能量和平均能量。结果:测定的辐射线质等参数与ISO和国家标准给出的技术指标误差<2%,满足标准装置的要求。结论:建立的X射线环境水平标准装置可以用于校准环境水平辐射剂量仪、并为开展相关的研究工作提供实验条件。

Objective： According to the requirement of ISO and National Standard, new X-ray environmental standard for the calibration of environmental dosimeter was established in Beijing SSDL. Methods： Half value layer and air kerma dose-rate was determined in the X-ray environmental qualities by a standard dosimeter. Results： The technical requirement of ISO and National Standard are met within 2% for the X-ray environmental standard qualities in Beijing SSDL. Conclusion： The X-ray standard radiation field can be used for the calibration of environmental dosimeters and experiment of research.