Study Of Nanostructures Induced By Slow Highly Charged Ions

A thermal spike model for highly charged ions inducing nanostructures on solid surface is developed in this paper.Both the kinetic energy loss and the potential energy contribution are included in the model,so as to explain the experimental results that the potential energy thresholds for hillock formation can be influenced by the kinetic energy of incident ions.By contrasting simulation result with experiment data,the model is proved to be correct for low energy ions(v<0.5 vBohr),and can estimate the potential energy thresholds precisely.Nanostructure formation on mica surface inducing by ~290 keV Xeq+(q=31,33)is investigated experimentally.A correct potential energy threshold of 290 keV Xeq+ is suggested.