Abstract
A method for measuring the distribution of dipolar relaxation times and the dielectric constants by thermally stimulated current (TSC) is described. A technique of ’’thermal sampling’’ is used to isolate the TSC due to dipoles with a single relaxation time from the TSC due to dipoles with distributed relaxation times. A theory is developed to calculate distributions of the relaxation times from the TSC measured by the thermal sampling. Dielectric loss factors in polyethylene terephthalate are calculated from the TSC data and they are compared with the experimental values of the dielectric loss factors obtained from the absorption current measurement.