Luminescent properties of CsI single crystals grown from the melt treated with EuI2

Authors

  • V. L. Cherginets,

    Corresponding author
    1. Karasin Kharkov National University, Svobody Square, 4, Kharkov, 61077, Ukraine
    2. Institute for Scintillation Materials, National Academy of Sciences of Ukraine, Lenin Avenue, 60, Kharkov, 61001, Ukraine
    • Karasin Kharkov National University, Svobody Square, 4, Kharkov, 61077, Ukraine
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  • T. P. Rebrova,

    1. Institute for Scintillation Materials, National Academy of Sciences of Ukraine, Lenin Avenue, 60, Kharkov, 61001, Ukraine
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  • Yu. N. Datsko,

    1. Institute for Scintillation Materials, National Academy of Sciences of Ukraine, Lenin Avenue, 60, Kharkov, 61001, Ukraine
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  • V. F. Goncharenko,

    1. Institute for Scintillation Materials, National Academy of Sciences of Ukraine, Lenin Avenue, 60, Kharkov, 61001, Ukraine
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  • N. N. Kosinov,

    1. Institute for Scintillation Materials, National Academy of Sciences of Ukraine, Lenin Avenue, 60, Kharkov, 61001, Ukraine
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  • R. P. Yavetsky,

    1. Institute for Single Crystals, National Academy of Sciences of Ukraine, Lenin Avenue, 60, Kharkov, 61001, Ukraine
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  • V. Yu. Pedash

    1. Institute for Scintillation Materials, National Academy of Sciences of Ukraine, Lenin Avenue, 60, Kharkov, 61001, Ukraine
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Abstract

CsI single crystals treated with EuI2 as a scavenger are grown and their radioluminescence spectra and scintillation light decay curves are obtained. Addition of the quantities of the scavenger comparable with the total concentration of the oxygen-containing admixtures in the melt results in complete destruction of the latter. In its turn, this causes the disappearance of the band with a maximum at 2.8 eV in the radioluminescence spectrum and decreases the fraction of the slow 2 µs-component to 0.01. The addition of larger quantities of EuI2 leads to the appearance of a wide band with the maximum at 2.8 eV characterized by a decay constant of 2 µs; its intensity increases with the EuI2 concentration. The maximum ratio of two faster components with the decay constants equal to 7 and 30 ns approaches 0.58:0.41 at EuI2 concentration in CsI melt equal to 0.01 mol·kg−1.

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