THERMALLY STIMULATED CURRENTS IN POLYCRYSTALLINE DIAMOND FILMS - APPLICATION TO RADIATION-DOSIMETRY

Thermally stimulated currents (TSC) were studied in polycrystalline di amond films to gain information about the trap levels in this material . The TSC glow curve is composed of a dominant peak at 555 K with smal ler overlapping peaks in the 400-500 K range. The analysis of the TSC isothermal decay at high temperatures shows that the peak at 555 K is related to a trap level at 1.86 eV. The dose response and the room tem perature fading rate of TSC were measured in order to evaluate the pot ential of these films for UV radiation dosimetry. The TSC are found to increase sublinearly with the dose over three decades and to decay wi th the logarithm of the storage time at room temperature. (C) 1997 Ame rican Institute of Physics.