Cr-related centers in Gd3Ga5O12 polycrystals |
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| Authors: | L Kostyk Ya Zakharko B Kukliński |
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| Institution: | a Faculty of Electronics, Ivan Franko National University of Lviv, Tarnavskogo 107, 79017 Lviv, Ukraine
b Department of Mathematics, Physics and Informatics, Institute of Experimental Physics, University of Gdansk, Wita Stwosza 57, 80-952 Gdansk, Poland |
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| Abstract: | The luminescence excitation spectra, emission spectra under photo- and X-ray excitation, luminescence decay kinetics and thermostimulated luminescence (TSL) of Gd3Ga5O12 garnet (GGG) polycrystalline samples have been investigated. It was established that the spectrum of Cr3+ 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 Cr3+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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| Keywords: | 78 55 Hx 78 60 Kn 78 70 En |
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