哈尔滨工程大学学报2025，Vol.46Issue(11)：2233-2241,9.DOI:10.11990/jheu.202508011
CR-39探测器中α粒子与质子的甄别方法
Discrimination method for alpha particles and protons in CR-39 detectors
摘要
Abstract
Personal dose assessments on space stations may be inaccurate because of poor discrimination between al-pha particles and protons in CR-39 detectors used on these stations.To address these inaccuracies,simulations were conducted using Geant4 and Track.Based on track etching kinetics,Geant4 simulated physical particle transport,while Track simulated chemical etching and track evolution.The range,stopping power,and track parameters of 1～10 MeV alpha particles and protons in CR-39 were systematically analyzed,and the optimal etching conditions were determined.The results show that the range of alpha particles is only 1/4.5～1/10.5 that of protons at the same ener-gy,whereas the stopping power of alpha particles is 3.7～5.5 times higher.The track morphologies of alpha particles and protons are distinct under identical etching conditions:alpha tracks are presented as black circles with remark-ably larger diameters and depths,whereas proton tracks are gray.This study established a full-process simulation method for CR-39 detectors using Geant4 and Track,enabling effective discrimination between alpha particles and protons and providing key theoretical and technical support for space radiation monitoring.关键词
空间辐射/固体核径迹探测器/CR-39/α/质子甄别/化学蚀刻/Geant4仿真/阻止本领/TRACK模拟/径迹形态Key words
space radiation/solid state nuclear track detectors(SSNTDs)/CR-39/alpha/proton discrimination/chemical etching/Geant4 simulation/stopping power/TRACK simulation/track morphology分类
能源科技引用本文复制引用
张琪,宋玉收,曹勤剑,卫晓峰..CR-39探测器中α粒子与质子的甄别方法[J].哈尔滨工程大学学报,2025,46(11):2233-2241,9.基金项目
国家自然科学基金项目(12227810). （12227810）
