Armenian Journal of Physics

Absorption and Emitting Properties of GGG:Ce Single Crystals in the Range of 4f ↔ 5d Transitions of Ce3+ Ions

Mkrtchyan, M. and Butaeva, T.I. and Eganyan, A. and Ovanesyan, K. (2019) Absorption and Emitting Properties of GGG:Ce Single Crystals in the Range of 4f ↔ 5d Transitions of Ce3+ Ions. Armenian Journal of Physics, 12 (3). pp. 273-282. ISSN 1829-1171

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Abstract

The results of a spectral study of both unalloyed and cerium-doped gadolinium-gallium garnet single crystals (GGG and GGG:Ce) are presented.. The effect of the content of activator ions on the absorption properties of these crystals in the region of 4f-5d transitions of Ce3+ ions were considered. Four different photoluminescence bands of Ce3+ ions were obtained in a GGG:Ce (0.1%) crystal, whose wavelengths are determined by the excitation region of the activator absorption bands. It was shown that the presence of at least four main dodecahedral centers of Ce3+ ions in crystals allows one to explain the concentration shift of the activator absorption bands and the mechanism of formation of luminescence bands. Scintillation emission with a maximum at 550 nm was obtained in GGG:Ce (0.03 and 0.3%) crystals upon their excitation by X-ray radiation (22.163 keV).

Item Type:Article
Subjects:Physics > 42.Optics
Physics > 72.Electronic transport in condensed matter
ID Code:1074
Deposited By:Prof. Vladimir Aroutiounian
Deposited On:17 Oct 2019 22:56
Last Modified:18 Oct 2019 14:12

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