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Current issue   Ukr. J. Phys. 2017, Vol. 62, N 7, p.569-582
https://doi.org/10.15407/ujpe62.07.0569    Paper

Krech A.V.1, Galunov N.Z.1,2

1 Institute for Scintillation Materials, National Academy of Sciences of Ukraine
(60, Nauky Ave., Kharkiv 61072, Ukraine; e-mail: antonkrech@gmail.com)
2 V.N. Karazin National University of Kharkiv
(4, Svobody Sq., Kharkiv 61022, Ukraine)

Composite Scintillators and Some Features of Their Radiation Resistance

Section: Atoms and Molecules
Original Author's Text: English

Abstract: Nowadays, composite scintillators fnd applications in a growing number of tasks dealing with
the detection of ionizing radiation. They have several advantages in comparison with other
scintillation materials. With the emergence of a new generation of accelerators, the radiation
load on detectors is signifcantly increased. Therefore, the development of materials with high
radiation resistance for radiation detectors becomes an important task. We propose to apply
composite scintillators as radiation-resistant materials. The most important factor is that irradiation can signifcantly modify the characteristics of a scintillation material. The aim of this
work was to study the specifc features of possible radiation-induced damages and transformations in composite scintillators under the action of ionizing radiation. A comparative analysis
of the relative light yield, transmittance, and luminescence spectra, as well as their dependences on the accumulated dose, is carried out for various composite scintillators containing
grains of organic or inorganic single crystals, such as Gd2SiO5:Ce, Gd2Si2O7:Ce, Al2O3 :Ti,
Y2SiO5:Ce, and Y3Al5O12:Ce. Probable mechanisms of radiation-induced changes occurring
in scintillators under irradiation are proposed, and the infuence of those processes on the
radiation resistance of composite scintillators is analyzed.

Key words: composite scintillators, radiation resistance.

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