基于蒙特卡洛方法的X射线探测器能谱响应研究  

Research on response spectrum of X-ray detector by monte carlo method

作　　者：刘合凡[1] 葛良全[1] 郭生良 罗耀耀[1] 赵剑锟[1] 

机构地区：[1]成都理工大学核技术与自动化工程学院,成都610059 [2]成都国辐科技有限公司,成都610000

出　　处：《分析试验室》2015年第2期130-133,共4页Chinese Journal of Analysis Laboratory

基　　金：国家863计划(2012AA061803);国家自然科学基金(41074093);四川省重大科技成果转化项目(2013CC0045)资助

摘　　要：为解决X射线荧光测量过程中的仪器刻度和校正难题,通过理论研究并运用蒙特卡洛方法对X射线荧光仪进行建模,得到了X射线探测器能谱响曲线。结果表明:模拟的X射线探测器能谱响应全谱与实测情况基本一致,而主成份谱线则高度一致,特征峰半高宽相对误差均在5%以内。方法为X射线荧光测量的仪器刻度和校正提供重要的研究信息,不仅为元素分析工作节省大量人力物力,也为无标样X射线荧光分析提供了有力的理论支撑。方法也可用于X射线荧光分析过程中的其他研究领域。To solve the problems of the instrument scale and spectral correction in X-ray fluorescence measurement,in this paper the theory was researched and the model was established by the Monte Carlo method.The results show that it is consistent between the simulated X-ray detector response spectrum and the experimental measurement substantially,but the main ingredient spectrum is highly consistent. And the relative errors of FWHM for characteristic peaks are less than 5%. The method not only provides important research information for the calibration scale of X-ray fluorescence analyzer,which can save a lot of manpower and material resources for the elemental analysis work,but also provides a strong theoretical support for the nonstandard X-ray fluorescence analysis. This method can also be used in the other areas of X-ray fluorescence analysis.

关 键 词：蒙特卡洛方法 X射线探测器 能谱响应 主成份谱 

分 类 号：O657.3[理学—分析化学]