Instantaneous Electron Concentration in Crystalline Insulator Foils Being Irradiated by Charge-Neutral Rays

In this paper, we present an analytical solution of the steady and transient electron concentration in a crystalline insulator film exposed to a charge-neutral radiation. If a single, deep electron trap level is supposed, the steady conductivity is found to coincide with the power law. An asymptotic exponential solution of transient electron concentration has also been got when the irradiation-time is very large.