俘获效应对缪子寿命测量的影响
THE IMPACT OF CAPTURE EFFECTS ON THE MUON LIFETIME MEASUREMENTS
陈正宇 1宁传刚1
作者信息
摘要
缪子是粒子物理标准模型中的基本粒子,对其研究不仅涉及基础物理的前沿,还包括相关技术在工业民生领域的应用.对缪子寿命的测量涉及时间膨胀、费米耦合常数和原子核俘获等众多近代物理知识点,在大学本科物理课程中开设相关教学实验具有重要意义.通过运用信号判选电路甄别以及数字示波器触发记录,分别用塑料闪烁体和NaI(Tl)闪烁体探测器测量缪子衰变事件,由测量结果的差异得到俘获效应对缪子寿命测量的影响.
Abstract
Muon is a fundamental particle in the standard model of particle physics,and its re-search not only involves the frontiers of basic physics,but also includes the application of re-lated technologies in the fields of industry and daily life.The measurement of muon lifetime involves several key concepts in modern physics such as relativistic time dilation,Fermi cou-pling constant,and nuclear capture effects.It is of great significance to offer relevant teaching experiments in undergraduate physics courses.By using signal selection circuits for discrimi-nation and digital oscilloscope triggering for recording,the muon decay events were measured using plastic and NaI(Tl)scintillation detectors,respectively.The impact of capture effects on muon lifetime measurement was obtained from the difference in the measured results.
关键词
缪子/寿命测量/俘获效应/探测器Key words
muon/lifetime measurements/capture effects/detector引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据