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/C007964/1
• 负责人: Paul Nolan
• 金额: $ 21.56万
• 依托单位: University of Liverpool
• 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%2FC007964%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.

需要能够检测隐藏在例如行李中的爆炸物（或毒品）的检查系统。如果这些系统无需手动检查即可检查物体，那么它们将是最高效的。例如一个人不必检查每件行李或集装箱。炸药几乎普遍含有不同比例的氢、碳、氮和氧。检测此类元素的系统基于向系统发送中子束。不同的元素会发射不同能量的伽马射线，这些能量是相关同位素所独有的。这些伽马射线可以用锗伽马射线探测器精确测量，从而确定每种元素的含量。然后，该信息可用于确定四种元素的比例，从而确定是否存在爆炸物（或毒品等）。通过使用现代技术，锗探测器还可以用于拍摄被调查物体的图像，类似于机场行李扫描仪。在这种情况下，伽马射线和散射中子将被同时检测到，以形成更清晰的图像。在项目结束时，我们希望在实验室证明这些想法是有效的，并确定潜在的敏感性。