Theoretical Calculation of Delayed Radiation Induced Conductivity in Electron Beam Charged Polymer Foils

In this paper, We present the result of theoretical calculation of delayed radiation induced conductivity (DRlC) in charge free neutral polymer foils, which are irradiated by impenetrable electron beam. If a single trap level and a constant charge distribution are supposed in the irradiated region, within a very short time, DRIC of a charged film is found to vary hyperbolicly. It is just as that of charge free neutral material. But when t is infinite, the electrons in the conduction band of a charged film do not decay to zero. The DRIC will change exponentially for larger time.