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本文扼要介绍了探测核材料的最常用的方法，重点说明了被动探测方法中的γ射线探测的实验研究内容，研究结果表明，应用这种方法可以确认裂变材料是否存在和裂变材料的种类；通过定量分析和计算，可以粗估裂变材料的浓缩程度；推测裂变材料的来源；由实测γ谱可以推算核材料的质量等等。
This paper presents the most commonly used method of detecting nuclear material, focusing on the experimental study of gamma ray detection in passive detection methods. The results show that the existence of fissile material and the type of fissile material can be confirmed by this method. The quantitative analysis and calculation can roughly estimate the concentration of fissile material, speculate the origin of fissile material, and the mass of nuclear material can be calculated from the measured γ-ray.