一、引 言 核裂变产物铯在金属中的扩散现象的研究是一个令人感兴趣的课题.新近Matzke等[1]研究了艳在不锈钢中的扩散,其扩散系数随温度的变化关系为 D=0.3exp(-65000/RT)cm2·see-1.另外,艳与氧的结合可能是造成晶粒间界侵蚀作用的重要原因[2-4].因此,研究铯在金属中的迁移及 I. INTRODUCTION The research on the phenomenon of diffusion of fission product cesium in metal is an interesting topic.Recently, Matzke et al [1] studied the diffusion of vanadium in stainless steel, and its diffusion coefficient changes with the temperature as D = 0.3exp (-65000 / RT) cm2 · see-1. In addition, the combination of oxygen and oxygen may be the important reason for the intergranular erosion [2-4] .Therefore, the study of cesium in metal migration and