摘要
基于Geant4模拟开发平台,对γ成像系统进行了被动式成像数值模拟,并用γ相机对标准密封γ点源进行辐射成像实验,初步分析了便携式γ射线成像系统的成像特点。结果表明:该系统成像效果与源强、距离、时间等密切相关,源强越强,距离越近,清晰成像所需时间也就越短,且可以准确定位γ放射源,精确热点分布定位。
Based on the Geant4 MC simulation platform, passive mapping of the gamma mapping system is simu- lated. Then, mapping experiment of standard sealed γ point source is performed using γ mapping system, and the mapping characteristic is analyzied preliminarily. The results show that, the mapping effect is closely relat- ed to the source intensity, the distance between source and detector, exposure time. Generally, the more source intensity and the less distance could lead to less time to acquire the explicit image, more exact localization of the gamma source, and more accurate localization of the ＂hot point＂.
出处
《核电子学与探测技术》
CAS
CSCD
北大核心
2013年第4期452-454,共3页
Nuclear Electronics & Detection Technology
关键词
Γ相机
热点
定位
γ camera
hot point
localization
