μ子是地球表面的主要宇宙射线，可以通过碘化钠等常见闪烁体探测器进行探测．本文介绍了一种利用高采样率的示波器对探测器所捕捉到的μ子信号及其衰变信号进行数字化采集、线下软件分析的实验方法，进而得到μ子寿命．本实验操作相对简单，可以在不使用放射源和传统核电子学的情况下，拓展为近代物理或专业物理实验中的一个粒子探测前沿项目．

 Muon is the major cosmic rays at the sea level. It can be detected by scintillator detectors such as sodium iodide NaI(Tl). In paper, an experimental method is presented, which uses a high sampling rate oscilloscope to digitize the deposited signal of muon and the relevant decay signal, and the off-line analysis to determine the muon lifetimes. This experiment is relatively simple and can be extended as a frontier project for particle detection in college physics experiments, in which radioactive sources and conventional nuclear electronics are not essential.