The theory of thermally stimulated currents is investigated in the limits of slow and fast retrapping. A method of obtaining the ionization energy $E$ of the relevant traps is discussed. This method depends on the shift of the conductivity maxima with heating rate and does not involve prior knowledge of the trapping cross sections or of the heating rate.

• Received 30 July 1959

DOI:https://doi.org/10.1103/PhysRev.117.451