DISTINGUISH: Detection of explosive substances by tomographic inspection using neutron and gamma-ray spectroscopy

区别：使用中子和伽马射线光谱仪通过断层扫描检测爆炸性物质

• 批准号: EP/C008022/1
• 负责人: Malcolm Joyce
• 金额: $ 30.1万
• 依托单位: Lancaster University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2006
• 资助国家: 英国
• 起止时间: 2006 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FC008022%2F1
• 关键词: DISTINGUISH; Detection; explosive; substances; tomographic

There is a need for inspection systems that are able to detect explosives (or drugs) hidden in for example luggage. These systems are most efficient if they can inspect the object without having to investigate by hand. e.g. a person does not have to search each piece of luggage or container. Explosives almost universally comprise hydrogen, carbon, nitrogen and oxygen is different ratios. A system that will detect elements like these is based on sending a beam of neutrons into the system. The different elements will emit gamma rays of different energies which are unique to the isotopes concerned. These gamma rays can be measured accurately with a germanium gamma-ray detector and hence the amount of each element determined. This information can then be used to determined the ratios of the four elements and hence whether explosives (or drugs etc.) are present. By using modern technology the germanium detector can also be used to make an image of the object under investigate, similar to an airport baggage scanner. In this case the gamma-rays and scattered neutrons will be detected simultaneously to make a clearer image. By the end of the project we hope to have demonstrated in the laboratory that these ideas are effective and to determine the potential sensitivity.

需要检测隐藏在行李中的爆炸物（或药物）的检查系统。如果这些系统可以检查对象而无需手动调查，则它们是最有效的。例如一个人不必搜索每个行李或容器。炸药几乎普遍包含氢，碳，氮和氧气是不同的比率。一个将检测类似元素的系统基于将中子光束发送到系统中。不同的元素将散发出不同能量的伽玛射线，这些能量是相关同位素所独有的。这些伽马射线可以通过锗伽马射线检测器准确测量，因此可以确定每个元素的量。然后，该信息可用于确定四个要素的比率，因此可以使用爆炸物（或药物等）。通过使用现代技术，该锗探测器还可以用来制作正在调查的物体的图像，类似于机场行李扫描仪。在这种情况下，将同时检测到伽马射线和散射的中子，以制作更清晰的图像。到该项目结束时，我们希望在实验室中证明这些想法有效并确定潜在的敏感性。