用蒙特卡洛方法研究大气簇射契仑柯夫光与初级宇宙线特性之间的关系  

A study of relation between Cherenkov light distribution and character of cosmic rays by Monte Carlo method

作　　者：孙洛瑞[1] 孙韶丛[1] 

机构地区：[1]郑州大学,郑州450052

出　　处：《核技术》2000年第7期462-466,共5页Nuclear Techniques

基　　金：河南省科委资助;河南省教委自然科学基金!95000030

摘　　要：γ，p和Fe所产生的宇宙线大气簇射契仑柯夫光的强度分布特性进行了计算机模拟。结果表明，在初级宇宙线的能量处于能谱的“膝”区附近时，Fe簇射产生的契仑柯夫光强分布的变化率总是比γ和p簇射的要小。同时还发现，存在一个到簇射中心的特殊距离，在这里3种初级宇宙线所产生的契仑柯夫光的强度相同。这些特点可以被用来估计初级宇宙线的能量或区分初级宇宙线中的轻粒子和重粒子。The density distribution of Cherenkov lights produced by cosmic rays of γ, p and Fe was simulated by Monte Carlo method. The results showed that the slope of the density distribution of Cherenkov lights produced by Fe was obviously flatter than those produced by γ and p, if energy of the primaries was in the range around the ' knee' of the energy spectrum. Furthermore, a special distance from the shower core was found, at which the densities of Cherenkov lights produced by the three kinds of primaries are equal. These features may be favourable for estimating the shower energy and may give some criteria to distinguish the light primaries from the heavy ones.

关 键 词：契伦柯夫光 蒙特卡洛方法 特性 初级定宙线 

分 类 号：O572.12[理学—粒子物理与原子核物理]