测定混合核燃料裂变数的多核素法  

MULTINUCLIDE METHOD FOR DETERMINATION OF FISSION QUANTITY OF MIXED FISSILE MATERIAL

作　　者：丁玉珍[1] 杨裕生[1] 常永福[1] 王军[1] 卢加春[1] 刘德敏[1] 

机构地区：[1]西北核技术研究所

出　　处：《核化学与放射化学》1994年第4期240-243,共4页Journal of Nuclear and Radiochemistry

摘　　要：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 methd──multinuclide method is proposed for the determination of fission quanti-ties of mixed fissile material.Both total fission quantity and partial fission quantities of individualfissile materials can be obtained simultaneously by determining the number of nucleus of some fis-sion products with linear least-square method,in which the virtual fission quantity is y axis andthe ratio of fission yields for fissile materials is x axis,i.e.n_i is virtual fission quantity;y￣A_i is yield of fission product i for fissile material A;Y￣B_i is yield of fis-sion product i for fissile material B;n￣A_f is fission quantity of A;n￣B_f is fission quantity of B;A and Bare fissile materials,The intercept at yaxis is fission quantity of A and the n_i vaule at Y￣B_i/Y￣A_i=1 istotal fission quantity.The key of using this method is how to select fission products and theiryields,The rule of selection of fission preducts is discussed.

关 键 词：多核素法 混合核燃料 裂变数 

分 类 号：TL27[核科学技术—核燃料循环与材料]