Abstract
The luminescence excitation spectra, emission spectra under photo- and X-ray excitation, luminescence decay kinetics and thermostimulated luminescence (TSL) of Gd 3Ga 5O 12 garnet (GGG) polycrystalline samples have been investigated. It was established that the spectrum of Cr 3+ ion emission were present in all TSL peaks. The activation energies of traps that are responsible for appearance of TSL in the region 295–600 K were estimated. It is shown that delocalization of electrons from the Cr 3+e traps leads to the appearance of thermoluminescence (TL) glow peak at 390 K. The nature of other TSL peaks is discussed. The influence of visible light on the TSL intensity of the preliminary X-ray-irradiated samples is shown.
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