Theoretical description of the prompt component of pulsed radiation-induced conductivity in polymers in terms of the ion pair mechanism of radiolysis

摘要

The properties of the prompt component of radiation-induced conductivity in polymers was theoretically analyzed on the basis of numerical solution of the modified Smoluchowski equation. The time dependences for the concentration of trapped electrons and the geminate-pair current after delta-pulse irradiation were calculated. In addition, calculation for a pulse of a finite duration was performed. The field dependence of the prompt conductivity was determined: deviations from the Ohm's law begin at field strengths on the order of 10(7) V/m, the character of this dependence strongly varying with a decrease in the electron thermalization length.