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Thermally stimulated currents (TSC) were studied in polycrystalline diamond 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 smaller 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 temperature fading rate of TSC were measured in order to evaluate the potential of these films for UV radiation dosimetry. The TSC are found to increase sublinearly with the dose over three decades and to decay with the logarithm of the storage time at room temperature. © 1997 American Institute of Physics.