The energy transfer mechanisms between Ce 3þ and Tb 3þ in LaPO 4 :Ce,Tb nanocrystals have been studied by means of timeresolved luminescence spectroscopy in a wide temperature range (10-300 K). Special attention was paid to detailed comparative analysis of both rise and decay emission components of both

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PACS 78.47.+p, 78.55.Hx, 78.90.+t The luminescence spectra and luminescence decay kinetics in ZnWO 4 (nominal pure and doped with Fe and Mo) under pulsed electron beam and pulsed nitrogen laser excitation have been investigated. It is suggested that the two-stage intrinsic luminescence decay observed under ionizing radiation excitation in ZnWO 4 and CdWO 4 was due to two different self-trapped exciton (STE) configurations in these crystals. The role of Fe and Mo impurities for scintillation efficiency in ZnWO 4 and CdWO 4 has been discussed.