用Monte-Carlo方法计算正电子湮没寿命谱中的衬底效应  

Application of Monte-Carlo method to calculate the substrate effect in the lifetime spectrum of positron annihilation

作　　者：雷海乐[1] 应三丛[1] 张一云[1] 徐家云[1] 

机构地区：[1]四川大学,成都610064

出　　处：《核技术》2000年第6期397-400,共4页Nuclear Techniques

摘　　要：用Monte－Carlo方法模拟计算了22Na源的正电子在不同厚度Mylar膜、Ni膜衬底中的湮没几率，得出Si、Fe、PE、PP4种样品在不同Mylar膜厚度下的衬底效应。结果显示，对PE、PP样品衬底效应较Si、Fe等样品强。表明用Monte－Carlo方法计算衬底效应是可行的。Monte-Carlo method was applied to calculate the annihilation probabilities ofpositrons from 22Na in Mylar and Ni films with different thickness. Results ofsubstrate effects of Mylar films with different thickness for sample of Si, Fe, PE andPP were obtained. The results showed that the substrate effects for samples PE andPP were stronger than those for Si and Fe. Therefore it is feasible for usingMonte-Carlo method to calculate substrate effect.

关 键 词：MONTE-CARLO模拟 正电子湮没寿命谱 衬底效应 

分 类 号：O571.33[理学—粒子物理与原子核物理] O571.23[理学—物理]