X射线环境辐射监测仪器校准方法的研究

宋飞; 赵瑞; 丁卫撑; 张德亮; 杨扬; 吴金杰

doi:10.3969/j.issn.1000-1158.2021.09.19

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计量学报 ›› 2021, Vol. 42 ›› Issue (9) : 1237-1243. DOI: 10.3969/j.issn.1000-1158.2021.09.19

电离辐射、标准物质与生物计量

X射线环境辐射监测仪器校准方法的研究

宋飞^1,2,赵瑞²,丁卫撑¹,张德亮²,杨扬²,吴金杰²

作者信息 +

Research on Calibration Method of X-ray Environmental Radiation Monitoring Instrument

SONG Fei^1,2,ZHAO Rui²,DING Wei-cheng¹,ZHANG De-liang²,YANG Yang²,WU Jin-jie²

Author information +

文章历史 +

摘要

环境辐射监测仪表作为微弱放射性监测计量器具,它的量值溯源是一个急需解决的问题。由于环境辐射剂量率低且电离信号微弱,故通常采用大体积电离室或者充压电离室进行测量。依托60~250kV X射线空气比释动能基准电离室,在完成重过滤窄谱X射线辐射质空气比释动能绝对测量的基础上,通过逐级替代法完成大体积环境辐射监测仪器的校准。测量结果不确定度为5.6%(k=2),实现环境水平X射线空气比释动能测量量值溯源,为国内环境辐射监测仪器在低剂量率水平的性能评价提供计量保障。

Abstract

As a measuring instrument for weak radioactivity monitoring, the traceability of the environmental monitoring is an urgent problem to be solved. Because the environmental radiation dose rate is low and the ionization signal is weak, it is usually measured by large volume ionization chamber or charging pressure ionization chamber. On the based of primary standards of 60~250kV X-ray air kerma and absolute measurement of the air kerma under the narrow spectrum series X-ray radiation quality, radiation environmental monitoring instruments were calibratied by successive substitution method. The uncertainty of measurement measurement result is better than 5.6%(k=2). It realize the traceability of environmental level X-ray air kerma measurement, and provide metrological support for the performance evaluation of environmental radiation monitoring instruments at low dose rate level.

导出引用

宋飞,赵瑞,丁卫撑,张德亮,杨扬,吴金杰. X射线环境辐射监测仪器校准方法的研究[J]. 计量学报. 2021, 42(9): 1237-1243 https://doi.org/10.3969/j.issn.1000-1158.2021.09.19

SONG Fei,ZHAO Rui,DING Wei-cheng,ZHANG De-liang,YANG Yang,WU Jin-jie. Research on Calibration Method of X-ray Environmental Radiation Monitoring Instrument[J]. Acta Metrologica Sinica. 2021, 42(9): 1237-1243 https://doi.org/10.3969/j.issn.1000-1158.2021.09.19

中图分类号： TB98

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