|
|||||
|
|
| 气载氚监测仪校准用氚化甲烷体积活度测量方法及其不确定度分析 | |
| 引用本文： | 刘佳煜,郭涛,朱惠臣,钱楠,曾友石,赵超. 气载氚监测仪校准用氚化甲烷体积活度测量方法及其不确定度分析[J]. 计量学报, 2022, 43(1): 114-119. DOI: 10.3969/j.issn.1000-1158.2022.01.18 |
| 作者姓名： | 刘佳煜 郭涛 朱惠臣 钱楠 曾友石 赵超 |
| 作者单位： | 上海市计量测试技术研究院,上海201203;中国科学院上海应用物理研究所,上海201800;南华大学,湖南衡阳421001;中国科学院上海应用物理研究所,上海201800 |
| 基金项目： | 上海市青年科技启明星计划项目(19QB1404900)；;上海市科学技术委员会科研计划项目(19DZ2292600)； |
| 摘 要： | 针对气载氚监测仪校准用气体参考源氚化甲烷,提出其体积活度测量方法,用催化氧化燃烧炉将其转化为氚化水,用二级串联鼓泡器收集氚化水,并用液体闪烁计数器测定活度,从而确定气体参考源氚化甲烷体积活度,并进行了不确定度分析测定实验室已有氚化甲烷的体积活度为17.4 MBq/m3,不确定度为6.4％(k=2),符合GBT 3015... |
| 关 键 词： | 计量学 气载氚监测仪 氚化甲烷 体积活度 校准 液体闪烁计数器 不确定度分析 |
| 收稿时间： | 2021-06-28 |
Measurement Method of Volume Radioactivity of Tritiated Methane for Airborne Tritium Monitors Calibration and Its Uncertainty Analysis |
|
| LIU Jia-yu,GUO Tao,ZHU Hui-chen,QIAN Nan,ZENG You-shi,ZHAO Chao. Measurement Method of Volume Radioactivity of Tritiated Methane for Airborne Tritium Monitors Calibration and Its Uncertainty Analysis[J]. Acta Metrologica Sinica, 2022, 43(1): 114-119. DOI: 10.3969/j.issn.1000-1158.2022.01.18 | |
| Authors: | LIU Jia-yu GUO Tao ZHU Hui-chen QIAN Nan ZENG You-shi ZHAO Chao |
| Affiliation: | 1. Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China 2. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China 3. University of South China, Hengyang,Hunan 421001, China |
| Abstract: | Aiming at the tritiated methane as the gas reference source for the calibration of airborne tritium monitor, a method for measuring its volume radioactivity is proposed. Tritiated methane is transformed into tritiated water by catalytic oxidation combustion furnace. Tritiated water is collected by two-stage series bubbler, and measured by liquid scintillation counter.Finally, the volume activity of tritiated methane is determined, and the uncertainty is analyzed. Implementing the above method, the volume radioactivity of the tritiated methane in lab and its expanded uncertainty are determined to be 17.4 MBq/m;and 6.4%(k=2) separately, which meet the requirements for gaseous reference source according to GBT 30150-2013. The calibration experiment for a commercial airborne tritium monitor is conducted with the tritiated methane in lab, in which the calibration factor is 0.88. It indicates that the proposed method can provide a practical and credible technical basis for airborne tritium monitor calibration. |
| Keywords: | metrology airborne tritium monitor tritiated methane volume radioactivity calibration liquid scintillation counter uncertainty analysis |
| 本文献已被 维普 万方数据 等数据库收录！ | |
| 点击此处可从《计量学报》浏览原始摘要信息 | |
| 点击此处可从《计量学报》下载全文 | |