The features of radiation-induced conductivity under both continuous irradi
ation and strong pulse action is analyzed theoretically for polymers (PTFE
and LDPE) exhibiting a non-langevin mechanism of the bulk recombination. Re
combination in the "encounter pairs" occurring only during the exposure is
demonstrated to be the dominant recombination process in this case. After t
he maximum conductivity for continuous exposure has been reached, the trans
ition to the decay law t(-1) is observed immediately in the course of expos
ure, what is connected to the formation of radiation-induced traps (mainly
the radical products of radiolysis). The effect of preliminary irradiation
consists in a decrease in the nonstationary radiation-induced conductivity
measured in the small-signal mode only during the exposure. The decay bf th
e delayed component upon termination of the radiation pulse is almost unaff
ected; only at the observation times greater than or equal to 0.1 s the dec
ay can be accelerated due to the appearance of radiation traps generated by
preliminary irradiation.