标记中子法检测包裹内爆炸物

Detection of Explosives Hidden in Package by Using Tagged Neutron Method

利用标记中子方法（Tagged Neutron Method,TNM）对爆炸物进行检测可以降低本底、确定被检物位置,是国际上较早研究、目前也得到重视的一种方法。和通常的快中子检测手段相比,其可以降低本底200~300倍,可大大提高系统的信噪比,提高检测精度,减小测量时间。相比一般的爆炸物检测装置采用固定模式,论文介绍一种可移动式检测装置,包括其系统设计,探测器选取,标样的制备与检测,常见的两种爆炸物（TNT、硝铵）模拟物制备,系统整机测试等,并对系统测试结果进行分析,给出相应的改进建议。

The tagged neutron method（ TNM） for explosives detection is popular and is studied extensively around the world. The measurement precision can be improved and the measurement time can be reduced by using TNM method because it has advantage of high signal to noise ratio. Compared with traditional immovable setup,the system introduced in this paper is a kind of movable one. The system design,detector choice,standard sample preparation and measurement,two simulant explosives（ TNT and ammonium nitrate） preparation,whole system evaluation are introduced in this paper. The measurement results and corresponding improvement suggestions are also appeared here.