用于爆炸物探测的X射线相干散射技术研究  

Detection of Explosives by Coherent X-Ray Scatter Signature

作　　者：魏存峰[1] 郁忠强[2] 阎永廉[2] 周化十[2] 高树琦[2] 孔伟[2] 薛德胜[1] 魏龙[2] 

机构地区：[1]兰州大学磁学与磁性材料教育部重点实验室,兰州730000 [2]中国科学院高能物理研究所核分析技术重点实验室,北京100049

出　　处：《高能物理与核物理》2007年第1期104-107,共4页High Energy Physics and Nuclear Physics

基　　金：中国科学院重点实验室择优基金;高能物理研究所知识创新项目资助~~

摘　　要：建立了基于X光机的相干散射实验装置,对用于爆炸物探测的X射线相干散射技术进行了研究,在一个固定的角度下(6．5°),测量了多种常见爆炸物和非爆炸物的相干散射谱．结果表明,每种爆炸物都有特定的相干散射谱线,包含了与物质化学组分相关的“指纹信息”．使用这一方法可以将爆炸物从常见的非爆炸物中鉴别出来．Coherent X-ray scatter technology or energy-dispersive X-ray diffraction has been used for many years as a method to measure the atomic planar spacings in a crystalline substance. In this paper, this method has been shown to be of particular use when the requirement is to differentiate between low Z materials where transmission techniques provide very little contrast. We applied this technique to the detection and identification of explosives. Energy-dispersive detectors were used to collect coherent scatter spectra at a small angles （6.5°）. It is shown that the information from these ‘signatures＇ can be used to determine whether an explosive sample is present or not. The geometrical configuration of the collimation and the position of the subject must he take into careful consideration when optimizing the capabilities of such a system.

关 键 词：X射线 相干散射 爆炸物探测 

分 类 号：O434.1[机械工程—光学工程]