Influence of X-rays and gamma -rays on the electrical properties of PET films

Abstract

The authors present the results of investigations concerning thermally stimulated depolarization currents and measurements of permittivity, loss factor and DC conductivity from X-ray and gamma -ray irradiated commercial 125 mu Estrofol polyethylene terephthalate films. Samples were irradiated with three different doses in different gaseous environments (air and N/sub 2/) and the electrical properties were measured as a function of time. A distribution of activation energies of relaxation processes responsible for the alpha and rho peaks was found by applying partial heating techniques. >