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| 同步辐射单能X射线空气质量衰减系数的测量 | |
| 引用本文： | 杜海燕,李凡,吴金杰,王培玮,赖万昌,王继,赵屹东. 同步辐射单能X射线空气质量衰减系数的测量[J]. 计量学报, 2019, 40(2): 333-336. DOI: 10.3969/j.issn.1000-1158.2019.02.26 |
| 作者姓名： | 杜海燕 李凡 吴金杰 王培玮 赖万昌 王继 赵屹东 |
| 作者单位： | 成都理工大学,四川成都610059;中国计量科学研究院,北京100029;中科院高能物理研究所,北京,100049;中国计量科学研究院,北京,100029;成都理工大学,四川成都,610059;中国计量科学研究院,北京100029;河北科技大学,河北石家庄050018 |
| 基金项目： | 国家自然科学基金(11375227,11505178) |
| 摘 要： | 介绍了3种X射线空气质量衰减系数的测量方法:移动距离法、抽真空法、EGSnrc蒙特卡罗模拟计算法。给出了抽真空法中真空管内空气质量厚度改变量的计算公式,并模拟分析了真空管Be窗对实验的影响。移动距离法与抽真空法得到的结果较接近,验证了抽真空法实验的合理性。当X射线能量为6 keV、20 keV时,EGSnrc蒙特卡罗模拟计算结果与NIST标准数据库数值偏差分别为0.01%、0.26%。 |
| 关 键 词： | 计量学 空气质量衰减系数 抽真空法 移动距离法 蒙特卡罗模拟 |
| 收稿时间： | 2017-09-05 |
The Measurement of Synchrotron Radiation Single-energy X-ray Mass-attenuation Coefficient of Air |
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| DU Hai-yan,LI Fan,WU Jin-jie,WANG Pei-wei,LAI Wan-chang,WANG Ji,ZHAO Yi-dong. The Measurement of Synchrotron Radiation Single-energy X-ray Mass-attenuation Coefficient of Air[J]. Acta Metrologica Sinica, 2019, 40(2): 333-336. DOI: 10.3969/j.issn.1000-1158.2019.02.26 | |
| Authors: | DU Hai-yan LI Fan WU Jin-jie WANG Pei-wei LAI Wan-chang WANG Ji ZHAO Yi-dong |
| Affiliation: | 1. Chengdu University of Technology, Chengdu, Sichuan 610059, China 2. Nationa Institute of Metrology, Beijing 100029, China 3. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China 4. Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, China |
| Abstract: | Tree methods to measure the mass-attenuation coefficient of air for X-rays were introduced, which induding moving distance,vacuum and EGSnrc Monte Carlo simulation. Calculation formula of air mass thickness changed in vacuum tube after evacuated was given and influence of Be window on vacuum tube to experiment was analyzed by simulation.The results of moving distance and vacuum method have a little difference and rationality of vacuum method experiment was verified.The deviation of the results between EGSnrc Monte Carlo simulation and NIST standard database is 0.01% for 6keV and 0.26% for 20 keV X-rays respectively. |
| Keywords: | metrology mass-attenuation coefficient of air vacuum method moving distance method Monte Carlo simulation |
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