Thermal Electron Escape in Irradiated Dipolar Systems

摘要

The possibility of thermal electron escape from the neighborhood of positive ions is studied from the point of view of the change of free energy. On the basis of a generalized spur (track) model a sufficient condition is formulated for the decrease of free energy in electron escape. This condition is fulfilled in every system if the electronhyphen;electron repulsion is high, or in polar systems if the diffusing electrons are not too fast. Short dielectric relaxation time and large difference between static and infrared dielectric constants increase the escape probability.