摘要
利用TMVA软件包所提供的矩形截断方法进行了多参量的分析,实现对γ和强子簇射的分辨.测试结果表明,利用上述方法,在对强子簇射的排斥率达到60%的条件下,对γ簇射的挑选率最高可达到85%.能有效地排除宇宙线中的强子成分,降低本底,提高γ射线观测的信噪比.
Rectangular cut is performed with TMVA (Toolkit for Multivariate Analysis) program to separate the -initiated and hadron-initiated showers. From the test, we found that the efficiency for selecting the y-initiated showers can reach 85% while rejecting more than 60% of the hadron-initiated showers. The γ/hadron separation is effective in y astronomy studies for ground based experiment..
出处
《临沂师范学院学报》
2010年第3期85-89,共5页
Journal of Linyi Teachers' College
关键词
甚高能
广延大气簇射
特征量
击中数
矩形截断
VHE (very high energy)
Extended Atmosphere Shower
characteristic quantities
Nhit
rectangular cut