摘要
利用 Monte Carlo模拟数据研究了由γ射线和质子引起的空气簇射中的次级粒子在羊八井ARGO实验中的空间分布的不同,并利用G矩分析方法对γ射线和质子簇射的次级粒子在心区附近分布的多重分形性质进行了分析.从γ射线和质子事例的谱函数可以看出,利用这种方法,可以作为区分原初γ射线和质子的依据.结果表明在1-10TeV能区可以较好地区分γ射线和质子.
The differences of space distributions and time profiles between the γ-ray and proton induced shower particles are studied using Monte Carlo simulation data. The multifractal analysis is performed with the G-moment method for the distribution fluctuation of secondary particles near the core of showers induced by y-rays and protons. From the spectrum functions of γ and proton events, it is seen that this method can be adopted as a basis for the γ/proton separation. It is shown that the separation of γ and proton can be achieved with a good efficiency in the energy region of 1-10TeV.
出处
《高能物理与核物理》
CSCD
北大核心
2000年第4期279-284,共6页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金
高等学校博士学科点专项科研基金
关键词
心区次级粒子
多重分形矩
分布涨落
簇射
EAS
Monte Carlo simulation, multifractal moment, γ/proton separation Received 9 March 1999 Supported by National Natural Science Foundation of China and Reseach Fund for Doctoral Program of Higher Education