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.