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.
出处
《核技术》
CAS
CSCD
北大核心
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
