使用betaSim模拟β粒子检验相对论的动量-动能关系实验  

Designing software betaSim to simulate the relativistic momentum-kinetic energy relations tested by β-particles

作　　者：王思广[1] 罗棱尹 张戈辉 章立诚 刘晓楠 贾春燕 WANG Si-guang;LUO Ling-yin;ZHANG Ge-hui;ZHANG Li-cheng;LIU Xiao-nan;JIA Chun-yan(School of Physics,State Key Laboratory of Nuclear Physics and Technology,Peking University,Beijing 100871,China)

机构地区：[1]北京大学物理学院核物理与核技术国家重点实验室,北京100871

出　　处：《物理实验》2020年第12期9-14,共6页Physics Experimentation

基　　金：2020年北京大学本科教学改革项目(No.7100901172)。

摘　　要：基于Geant4软件包开发了模拟利用粒子检验相对论动量-动能关系实验的软件betaSim.该软件还可以模拟在实验装置的出射窗及探测器之间加不同厚度的铝片的条件下获得的能谱.学生可以通过分析betaSim模拟的能谱,加深对实验的理解,并学习Genat4软件及提高数据处理能力.With Geant4 package,a software named betaSim was developed to simulate the proces-ses of β-particle deflection and detection in magnetic field.The software could simulate the energyspectra ofβ-particles after partly absorbed by different lengths of air and different thickness of alumi-num layers,the relativistic momentum-kinetic energy relations tested byβ-particles experiment wasreproduced.It could also simulate the y energy spectra of ^137Cs and^60Co for energy calibration,Students could understand more clearly of the experiment by visualizing the simulated particle tracksand analyzing the simulated data,and explore the interaction details between particles and matter byreading the simulation code.

关 键 词：Β粒子 Geant4模拟 能谱 动量-动能关系 

分 类 号：O571.1[理学—粒子物理与原子核物理]