用宇宙线大气簇射N_e-M_μ关系研究“膝”区原初成分  

Study of Primary Cosmic Ray Composition around the "Knee" with N_e-N_μRelationship of EAS

作　　者：杨洪涛[1] 刘俊[1] 耿庆熹[1] 刘长钦[1] 张品[1] 高晓宇[1] 查敏[2] 荆贵茹[2] 经才骝[2] 朱清棋[2] 张增[3] 梁淦章[3] 吴本韩[4] 

机构地区：[1]云南大学宇宙线研究所,昆明650091 [2]中国科学院高能物理研究所,北京100049 [3]香港城市大学 [4]香港教育学院

出　　处：《高能物理与核物理》2006年第6期497-500,共4页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金(10120130794)资助~~

摘　　要：用梁王山宇宙线观测站获得的宇宙线大气簇射μ子数据,与假设原初分别为质子、氦核、中等核(Z=15)和铁核的Monte-Carlo模拟结果进行比较,结果显示宇宙线膝区原初成分无明显变化且以轻核为主．The lgNe-IgNμ relationship has been studied from 4.4×10^4 events （total observation time is 2.9×10^6s） collected from Mt. Liang Wang Array （24.5°N, 102,9°E, 2720m above sea level）. In order to study the mass composition at the knee, Monte-Carlo simulations for the EAS development and detection under same event selection criteria as used in the experimental data have been performed. The result shows that the mass composition of primary cosmic rays has no obvious change and the dominant component is light nuclei around the knee.

关 键 词：Ne-Nμ关系 膝 原初宇宙线成分 

分 类 号：O572.12[理学—粒子物理与原子核物理]