Computer simulation studies of recombination of ions in multi ion-pair ensembles. Comparison of the results for the diffusion processes and processes characterized by long mean free paths of charged species

The problem of the diffusion-controlled recombination of ions for the case where initially two or more nonseparable pairs of oppositely charged ions are present in the system is treated by means of computer simulation. In the first stage, the calculations for the media with the short mean free paths of the free movement of ions between scattering events were performed (diffusion model). The results were compared with the results of the calculations of the electron-cation recombination in the systems characterized by long mean free path of electron between the scattering events. The scale of the deviations of the kinetics of the recombination process in the multi-pair clusters from the kinetics for the isolated pairs was estimated for both the diffusion case and the long mean free path case. The deviations of the multi-pair kinetics and escape probability from the corresponding single-pair results are significant. (author)