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用模拟软件GEANT 4对BESⅢ探测器中π介子的穿透效应进行了模拟,给出了不同动量的π介子在μ探测器中穿透效率。对π介子与μ轻子在μ探测器中的行为做了对比研究,从而为BESⅢ中π/μ鉴别提供帮助。
Through the simulation software GEANT 4, the penetration effect of π meson in BES Ⅲ detector was simulated and the penetration efficiency of pion with different momentum in μ detector was given. The behavior of pion and μ-lepton in the μ detector is compared, which helps to identify π / μ in BESⅢ.