爆炸物检测中典型样品的瞬发γ谱测量  

Prompt gamma-ray spectra measurement of typical sample in explosive detection

作　　者：郭海萍[1] 郑普[1] 安力[1] 王新华[1] 阳剑[1] 何铁[1] 杨小飞[1] 朱传新[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《强激光与粒子束》2013年第9期2429-2432,共4页High Power Laser and Particle Beams

基　　金：科技部推广项目(2011685)

摘　　要：在中子检测爆炸物的研究中,利用14MeV中子与原子序数大于5的原子核相互作用可产生特征γ射线的特性,采用伴随粒子法结合D-T中子飞行时间技术,使用尺寸为12.5cm×20cm的大体积NaI(Tl)探测器,对爆炸物所含元素C,N,O以及一些模拟炸药样品进行了瞬发γ谱测量。获得了几种典型样品的特征γ谱,并对其进行了分析。实验结果与欧盟同期结果进行了比较,表明本实验研究达到了目前国际同类实验的水平,可以为中子检测爆炸物识别技术提供实验支持。In research of explosive detection by neutron probe,the gamma rays was produced by 14 MeV neutron bombardment on the sample nucleus with atom numbers bigger than 5.The gamma spectra of typical elements,such as C,N,O and simulated explosive,were measured by associated particle technique（APT） and time of flight（TOF）.The large NaI（Tl） detector with the dimension of 12.5 cm×20 cm was used.The measured gamma spectra were compared with those of European Union（EU）.The results show that both of the experiments were at the same level.

关 键 词：爆炸物检测 D-T中子 瞬发γ能谱 

分 类 号：TL8[核科学技术—核技术及应用]