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提出了一种测定混合核燃料裂变数的新方法──多核素法。通过分析样品中若干个裂变产物的核数，按虚拟裂变数对两种核燃料裂变产额比进行线性回归，可同时计算总裂变数和两种核材料的分裂变数。文中给出了分析核素的选择要求和裂变产额的确定原则。
A new method to determine the fission number of mixed nuclear fuel is proposed-multinuclear method. By analyzing the number of fission products in the sample and the fission number of the fission products, the fission yield ratio of two kinds of nuclear fuel is linearly regressed. The total fissile number and the fission variables of two kinds of nuclear materials can be calculated simultaneously. The paper gives the principle of determining the choice of nuclides and the fission yield.