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核材料属性的研究是核取证学应用于核材料归因的重要基础。芯块是核燃料循环中的最重要的目标产品,也是核取证学应用研究的重点材料。本工作对来自3种不同堆型的二氧化铀芯块进行核材料属性分析,测定其宏观尺寸、重量、密度,使用扫描电镜和能谱仪(SEM/EDX)进行微观形态分析和元素分析,使用多接收电感耦合等离子体质谱(MC-ICP-MS)测定样品的~(234)U/~(238)U、~(235)U/~(238)U和~(236)U/~(238)U同位素比,利用四级杆电感耦合等离子
The study of the properties of nuclear materials is an important basis for the application of nuclear evidence to nuclear materials. The pellet is the most important target product in the nuclear fuel cycle, and is also the key material for the study of nuclear evidence. In this work, the nuclear material properties of uranium dioxide pellets from three different heap types were analyzed. The macroscopic size, weight and density of the uranium dioxide pellets were analyzed. The microstructure and elemental analysis were analyzed by scanning electron microscopy and energy dispersive spectroscopy (SEM / EDX) The ~ (234) U / ~ (238) U, ~ (235) U / ~ (238) U and ~ (236) U / ~ (238) U of the samples were determined by multi-inductively coupled plasma mass spectrometry (MC- ICP- 238) U isotope ratio, the use of four rod inductively coupled plasma