Radiation-induced conductivity and charge storage in dielectrics — Dispersive transport regime

Abstract

Radiation-induced conductivity (RIC), storage and relaxation of space charge in disordered dielectrics are theoretically studied under the condition of dispersive transport. Pulsed and step-function regimes of charge-carrier generation are considered for short-circuited samples» It is shown that time dependences of RIG and space charge density (SCD) exhibit some interesting features, which are typical for the dispersive transport. In particular, for the step-function carrier generation RIC passes through a maximum before the steady-state level is established, with the initial asymptote preceding the maximum and the final asymptote following the maximum appeare to be power-law functions of time.