静电收集-能谱法测氡装置设计  

Design of energy spectrum device for radon measuring with electrostatic collection method

作　　者：过惠平[1] 魏志浩[1] 吕宁[1] 吕汶辉 鲍卫红 赵永刚[1] 

机构地区：[1]第二炮兵工程大学,西安710025

出　　处：《核技术》2014年第6期39-44,共6页Nuclear Techniques

摘　　要：提出静电收集-能谱法测氡原理,初步建立静电收集-能谱法测氡系统。针对影响测量结果的铝箔、空气层等主要因素,建立合理的放射源和几何模型,运用Geant4软件进行模拟,对结果进行处理,得到了α粒子能量大小、α能谱的半高宽(Full Width at Half Maximum,FWHM)、能量分辨率、峰位差、能谱分辨能力与铝箔和空气层厚度的关系,确定了铝箔、空气层厚度最佳取值范围。并选择合适的铝箔、空气层厚度,在氡室内进行测量,验证了模拟分析的正确性,为静电收集-能谱法测氡装置的研制提供了可靠数据。Background： This research is to take energy spectrum of α particle into consideration in the measurement of radon. Purpose： We aim to find the influence factors of screening particle energy during the process of detector design. Methods： Based on the electrostatic collection radon measurement method, in order to study the influence factors of the measurement such as aluminum foil and air layer, the reasonable radiation source and geometric model are abstracted and calculated with Geant4 software. Results： The best ranges of aluminum foil thickness and air layer thickness are obtained by analyzing their relationship with α energy, the Full Width at Half Maximum （FWHM）, the energy resolution, the distance of peaks and the peaks screening power. Conclusion： With the results adopted above, the energy spectrum device is fabricated. Based on the α energy spectrum sampled in a radon chamber, the validity of this design has been proved. It provides a set of reliable data for the design of radon measuring device with electrostatic collection method.

关 键 词：静电收集 GEANT4 氡测量 α能谱 蒙特卡罗 

分 类 号：TL817[核科学技术—核技术及应用]