THERMALLY STIMULATED LUMINESCENCE OF PBWO4 CRYSTALS

A study of the thermally stimulated luminescence (TSL) and conductivit y (TSC) properties of PbWO4 crystals was performed on a selected set o f samples. Under X-ray irradiations at 90 K TSL peaks are observed in three temperature regions, (100-130 K, 160-200 K, 220-300 K) with corr esponding TSC structures. Room temperature irradiations put in evidenc e a weak TSL peak around 360 K. The emission spectra of the TSL signal s are also presented. On the basis of these measurements, the possible nature of the defects involved in the TSL processes is discussed.