ON THE THERMALLY STIMULATED CONDUCTIVITY WITH SMALL RECAPTURE RATE AND TEMPERATURE-DEPENDENT CAPTURE CROSS-SECTIONS

Thermally stimulated conductivity (TSC) peaks corresponding to small r ecapture rate and temperature dependent capture cross sections are inv estigated. The shape of the TSC peak is studied by computing the shape factor mu(g)(x) not only at the fractional intensity x = 1/2 as done conventionally but also at x = 2/3 and 4/5. It is found that for a par ticular value of x, mu(g)(x) depends on u(m) = E/kT(m) (E = activation energy, k = Boltzmann's constant, T-m = peak temperature). A set of e xpressions based on the shape of the peak has been derived, which in p rinciple can be used to evaluate the activation energy of such TSC pea ks. The applicability of those expressions has been tested by consider ing some numerically computed and experimental TSC peaks.