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Influence of Activator Concentration on the Spectral-Luminescence and Scintillation Properties of YAG:Ce Crystals

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Abstract

The luminescence and scintillation characteristics of cerium-doped yttrium aluminum garnet crystals grown from melts in vacuum have been analyzed. Absorption and X-ray luminescence spectra, X-ray luminescence decay kinetics, and scintillation specific light yield in a wide range of activator concentrations (from 0.0036 to 1.175 at % with respect to substitution for yttrium at the c sites of the garnet structure) have been studied. Effective quenching of the intrinsic luminescence of antisite and vacancy defects of the base crystal in the UV region with an increase in the activator concentration has been found. The optimal activator concentration has been determined in order to increase the X-ray luminescence intensity and the scintillation light yield of Ce3+ ions, with allowance for the technological features of growth of single crystals of high optical quality with a high Ce3+ concentration by the horizontal directional crystallization in vacuum. The dependences of the X-ray luminescence kinetics on the activator concentration have been analyzed. It is shown that crystals with the specific light yield up to 25 000 ph/MeV can be grown.

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Funding

This study was performed within a State assignment for the National Research Centre “Kurchatov Institute” in the part concerning the growth and treatment of crystal samples, analysis of their phase compositions, and X-ray fluorescent measurements of the activator concentration and supported by the Ministry of Science and Higher Education of the Russian Federation (agreement no. 075-15-2021-1362 on October 12, 2021) in the part concerning the growth of single crystals and analysis of the spectral-luminescence and scintillation characteristics.

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Authors and Affiliations

  1. National Research Centre “Kurchatov Institute”, 123182, Moscow, Russia

    V. A. Fedorov, E. V. Antonov, V. M. Kanevsky, B. V. Nabatov & E. S. Saltanova

  2. Peter the Great St.-Petersburg Polytechnic University, 195251, St. Petersburg, Russia

    I. D. Venevtsev

  3. Moscow Institute of Physics and Technology, 141700, Dolgoprudnyi, Moscow oblast, Russia

    E. S. Saltanova

Authors
  1. V. A. Fedorov
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  2. E. V. Antonov
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  3. I. D. Venevtsev
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  4. V. M. Kanevsky
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  5. B. V. Nabatov
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  6. E. S. Saltanova
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Correspondence to V. A. Fedorov.

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Translated by A. Sin’kov

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Fedorov, V.A., Antonov, E.V., Venevtsev, I.D. et al. Influence of Activator Concentration on the Spectral-Luminescence and Scintillation Properties of YAG:Ce Crystals. Crystallogr. Rep. 69, 263–269 (2024). https://doi.org/10.1134/S1063774524600054

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  • DOI: https://doi.org/10.1134/S1063774524600054

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