惰性气体在固体中的扩散和释放理论

本文给出了一个描述在各种固体材料中离子注入的惰性气体的扩散和从表面释放的模型。在这个模型中,同时考虑了各种缺陷和辐照损伤与惰性气体原子的相互作用,根据这个模型,给出了一组描写惰性气体原子的扩散方程,并给出了这组方程的解析解。与实验测量比较表明,这个模型能很好地描写惰性气体从固体表面释放的特性。用最小二乘法将理论释放曲线拟合于实验释放曲线,从而给出一个确定各种陷阱中心的激活能和归一化浓度的方法。 关键词：

A THEORY FOR DIFFUSION AND RELEASE OF IRERT GASES IN SOLIDS

A model is proposed to describe the diffusion and release behaviour of inect gases implanted into various solids. According to this model, in which the interactions between different defects or radiation damage and the inert gas atoms are taken into account, a set of diffusion equations is derived and the analytical solutions of these equations are obtained.The comparison between the theoretical results and the experimental results shows that this model can be used to describe the release of inert gases from the surfaces of solids very well. By least-squares fitting the theoretical release curve to that of the experiment, a method to determine the activation energies of different trapping centres and the trapped concentration is provided.