【摘要】 用２种不同产额中子源，检测有无炸药时行李箱不同位置氮、氧元素的０．５１１、６．１３ＭｅＶγ能谱及其比值，确定检测灵敏度和检速，给出不同氮、氧含量的炸药与非炸药材料的平面分布，讨论检测方法的安全性及快中子活化分析（ＦＮＡＡ）系统的整体设计。更多还原

【Abstract】 Spectra of 0.511 MeV γ-ray of nitrogen and 6.13 MeV γ-ray of oxygen and their ratio aremeasured by using two neutron sourses of different yield for explosive or non-explosive materials.Sensitivity and detecting speed are determined.A planar distribution of the explosive or non-ex-plosive materials with different contents of nitrogen and oxygen is given. The whole design andsecurity of detection method of fast neutron activation analysis system is disscussed for explosive sconcealed.更多还原