Browsing by Author "Zakharko, Ya."
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Item Luminescence of Bi3+ Ions in GGG epitaxial films(Видавництво Львівської політехніки, 2012) Luchechko, A.; Syvorotka, I. I.; Zakharko, Ya.; Syvorotka, I. M.Absorption, emission spectra under UV and Xray excitations, as well as luminescence decay kinetics of GGG:Bi single crystalline films were studied. The emission spectra observed in the spectral region 350-700 nm at room temperature consist two elementary bands peaked at 446 and 521 nm. The influence of growth conditions on the optical-luminescent properties of GGG: Bi3+ garnet have been revealed. The ratio of the bands intensities in luminescence spectra under different types of excitation and their temperature dependencies were determined.Item Optical absorption and luminescence of chromium doped Gd3Ga5O12 epitaxial films(Видавництво національного університету “Львівська політехніка”, 2009) Zakharko, Ya.; Syvorotka, I. I.; Luchechko, A.; Syvorotka, I. M.; Sugak, D.; Vakiv, M.Item Oxygen-related defects and luminescence properties of CaMoO4 single crystals and CaMoO4-CaWO4 compounds(Видавництво Львівської політехніки, 2012) Zakharko, Ya.; Luchechko, A.; Solskii, I.Emission spectra under UV and X-ray excitations, as well as luminescence decay kinetics of CaMoO4 single crystals and CaMoO4-CaWO4 mixed structures were studied. The broad luminescence bands with maxima at 425 and 530 nm correspond to CaWO4 and CaMoO4 crystals, respectively. The decay kinetics show nonsingle exponential behavior for all investigated CaMoO4- CaWO4 samples at room temperature.Item The anisotropy of scintillation characteristics of CaMoO4(Видавництво національного університету “Львівська політехніка”, 2009) Solskii, I.; Chernyak, D. M.; Danevich, F. A.; Luchechko, A.; Podviyanuk, R. B.; Stryganyuk, G.; Zakharko, Ya.