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在俄罗斯学者用252Cf源慢化后辐照UO2粉末,探测到浓缩铀中235U裂变产物的缓发γ射线(138Cs,能量1436keV)研究成果的启发下分析了用浓缩铀U3O8堆照后获得的裂变产物能谱;并建立了252Cf源辐照金属铀球壳的简单模型,进行了活化法判定铀部件是否为浓缩铀初步的可行性研究。认为:在一定条件下,活化法判定铀材料是否为浓缩铀是可行的。与被动法测量γ谱判定铀材料是否为浓缩铀相比,活化法的优越性在于:当以堆后料作为浓缩铀原料时,可以用被动法判定浓缩铀;而该方法可以判定堆后料或堆前料生产的浓缩铀。
After the Russian scholar irradiated the UO2 powder with 252Cf source and detected the delayed γ-ray (138Cs, energy 1436keV) of 235U fission product in enriched uranium, the fission obtained after heaping with U3O8 enriched uranium The energy spectrum of the product was also established. A simple model of irradiated uranium spherical shell with 252Cf source was established, and a feasibility study was conducted to determine whether the uranium component was enriched uranium by activation method. It is considered that under certain conditions, it is feasible to determine whether the uranium material is enriched uranium by the activation method. Compared with the passive method to determine the γ-ray to determine whether the uranium material is enriched uranium, the advantage of the activation method lies in that the passive method can be used to determine enriched uranium when the post-stack material is used as the raw material for enriched uranium; Or heap of pre-production of enriched uranium.