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Relaxation of optical excitations in crystals of the Y2O3-Al2O3 system with radiation defects

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Abstract

The photoluminescence and short-time persistence (afterglow) kinetics in pure and doped Y2O3-Al2O3 crystals excited with UV laser pulses (12 ns, 337 nm) were studied using samples irradiated with gamma quanta from a 60Co source to a dose from 104 to 107 Gy. The relaxation time of the samples studied increases, with decreasing symmetry of the crystal lattice, in the following order: garnet—orthoaluminate—ruby—yttria. The afterglow duration and intensity significantly decrease in gamma-irradiated crystals, which is explained by the predominant recombination of close electron-hole pairs. Garnet-neodymium crystals are characterized by high radiation stability and fast relaxation kinetics.

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Authors and Affiliations

  1. Institute of Nuclear Physics, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan

    M. A. Mussaeva, A. A. Gafarov & E. M. Ibragimova

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  1. M. A. Mussaeva
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  2. A. A. Gafarov
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  3. E. M. Ibragimova
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Translated from Pis’ma v Zhurnal Tekhnichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 29, No. 5, 2003, pp. 78–86.

Original Russian Text Copyright © 2003 by Mussaeva, Gafarov, Ibragimova.

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Mussaeva, M.A., Gafarov, A.A. & Ibragimova, E.M. Relaxation of optical excitations in crystals of the Y2O3-Al2O3 system with radiation defects. Tech. Phys. Lett. 29, 210–213 (2003). https://doi.org/10.1134/1.1565636

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  • DOI: https://doi.org/10.1134/1.1565636

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