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Information × Registration Number 0222U001929, 0120U102158 , R & D reports Title System for diagnostics of ZnSe crystals as detectors of ionizing radiation. popup.stage_title Head Degoda Volodymyr Ya., Доктор фізико-математичних наук Registration Date 04-02-2022 Organization Taras Shevchenko National University of Kyiv popup.description2 Object of study - Single crystals of zinc selenide. The aim of this work is to conduct complex experimental studies of the conductivity and luminescence of ZnSe crystals to determine the possibility of their use as detectors of ionizing radiation. Research methods - X-ray conductivity and X-ray luminescence, phosphorescence and relaxation of the conduction current at different temperatures, thermally stimulated conductivity and luminescence. It has been verified that X-ray irradiation of ZnSe crystals will not create color centers. The spectra of photo- and X-ray luminescence at different temperatures have been experimentally studied. An anomalous temperature dependence for the spectral position of the maximum was found for the main band of luminescence with a maximum at 630 nm. But the main feature of the luminescence center with a total maximum at 630 nm is that in the X-ray luminescence spectrum there is a luminescence band of ~ 630 nm, which is absent in the phosphorescence and thermally stimulated luminescence spectra. This can be explained only by the fact that the luminescence of one of the two elementary bands for 630 nm is due to the hole recombination mechanism (recombination of a free hole with an electron located at the center of luminescence). And the second elementary band 630 nm and the band 970 nm are due to the electronic mechanism of recombination (recombination of a free electron with a hole located in the center of the glow). The X-ray conductivity current, conduction current relaxation and thermally stimulated conductivity are due to free electrons. The Alentsev-Fock method decomposed the 630 nm band into components. The components of the schedule are well described by Gaussians. The spectral positions of the components and their half-widths are the same in RL and FL. The main components of the 630 nm band will have maxima at 1.875 eV (661 nm) δ = 0.181 eV and 2.028 eV (611 nm) δ = 0.196 eV at room temperature and will be called, respectively,   Product Description popup.authors Doroshenko Iryna Yu. Kohut Yana Р. Losytsʹkyy Mykhaylo Yu. Pavlova Natalija Yu. Podust Halyna Р. popup.nrat_date 2022-03-09 Close