蒙特卡罗方法在X荧光无损分析中的应用  

Application of Monte Carlo method in nondestructive X-ray fluorescence analysis

作　　者：田玉仙[1] 吴丽萍[2] 王刚[1] 

机构地区：[1]西安科技大学,西安710054 [2]四川大学物理系,成都610064

出　　处：《核技术》2004年第1期48-52,共5页Nuclear Techniques

摘　　要：探讨了X射线荧光分析(XRF)初测和蒙特卡罗模拟计算相结合的无损定量分析方法,分析了成都市空气飘尘的铅浓度。分析结果表明成都市空气飘尘铅平均质量浓度是1.24μg/m3,与有关文献报道的用原子吸收光谱仪测定结果(1.80μg/m3)相比无显著差异;绘制了Si(Li)探测器相对探测效率曲线;讨论了影响探测效率的几个主要因素,并给出了定量估计。A feasible nondestructive quantitative analysis method combining XRF primary measurement with Monte Carlo simulated calculation is advanced. Concentrations of lead in aerosol in Chengdu city were determined to be 1.24μg/m3, which had no distinct difference compared with 1.80μg/m3 provided by the relative references based on atomic absorption spectrum analysis. A relative efficiency curve of Si(Li) detector is drawn, and some factors that may affect the detector efficiency are discussed quantitatively.

关 键 词：X射线荧光分析 蒙特卡罗方法 迭代法 空气飘尘 铅浓度 

分 类 号：O242[理学—计算数学] O571.33[理学—数学]