脉冲快热中子分析探雷技术实验研究  

Experimental research on PFTNA landmine detection

作　　者：丁阁[1] 储诚胜[1] 郝樊华[1] 曾军[1] 向清沛[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所绵阳621900

出　　处：《核技术》2013年第3期10-16,共7页Nuclear Techniques

摘　　要：基于微秒量级的脉冲D-T中子发生器以及溴化镧探测器,搭建了脉冲快热中子分析探雷实验系统。在典型有机土壤与无机土壤背景中开展了地雷及干扰物探测实验,通过分时测量系统,成功获取了各种目标物的快中子诱发伽马谱与热中子诱发伽马谱。通过对中子诱发伽马能谱中12C、16O、1H、14N四种核素相应特征峰的分析,得到了目标物中各核素的相对含量信息,在不同土壤背景下均能有效实现地雷样品和常见干扰物的分辨。Background： Pulsed fast/thermal neutron analysis （PFTNA） is an advanced bulk technique for non-destructive elemental characterization, which was applied to landmine identification in some advanced countries. Purpose： To demonstrate the feasibility of the PFTNA landmine detection method. Methods： A FFTNA landmine identification system was set up based on a millisecond pulsed D-T neutron generator and a LaBr3 （Ce） gamma detector. Interrogative experiment was carried out on different landmines and distracters in the typical organic soils and inorganic soils. Results： The fast neutron induced spectra and the thermal neutron induced spectra of the samples were obtained successfully through time-sharing measurement circuit. The relative contents of 12C. 160, 1H. 14N contained in the objects were obtained through the analysis of the neutron induced spectra. Conclusions： It could be concluded that the PFTNA method can identify the landmines from the common distracters.

关 键 词：脉冲快热中子分析 中子质询 地雷探测 

分 类 号：TL99[核科学技术—核技术及应用]