The time-resolved luminescence excitation and luminescence spectra, as well as decay kinetics, were measured on the MDR-23 monochromator at temperatures of 77 K and 300 K. The FEU-83 и Hamamatsu R5108 photomultipliers were used as detectors. The Tektronix -TDS3052B broadband oscilloscope was used to record the time-resolved luminescence spectra and decay curve at the Solar LP-604 parametric generator excitation. The double spectral selection technique was used to record the decay curves accurately .