Mechanism of light scattering defects formation in NaI:Tl during crystal growth

  • A. V. Кolesnikov Institute for scintillation materials National Academy of Science, 60 Nauki ave., 61001, Kharkiv, Ukraine
  • K. A. Кudin State Enterprise Ukrainian RTC Energostal, 9, Nauki ave., Kharkov 61166, Ukraine
  • A. M. Кudin National University of civil protection of Ukraine, 94 Chernyshevska str., 61023 Kharkiv, Ukraine https://orcid.org/0000-0003-4788-6665
Keywords: growth defects, inclusion of new phase, heterogeneous decay of solid solution

Abstract

Nature of growth light scattering defects in NaI:Tl crystal has been studied by optical and electron microscopy technique. The heterogeneous mechanism of inclusion formation has been proposed. This mechanism consists in three stages. At first stage, sodium oxide diffuses to the internal surfaces of gas bubbles or channels. The oxide then reacts with carbon dioxide and converts into sodium carbonate. At the third stage, a new phase is formed inside the gas-filled channels. Finally carbonates covered internal surface of gas channels due to the shape of inclusion becomes morphologically stable.

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Published
2018-10-11
How to Cite
КolesnikovA. V., КudinK. A., & КudinA. M. (2018). Mechanism of light scattering defects formation in NaI:Tl during crystal growth. Journal of V. N. Karazin Kharkiv National University. Series Physics, (28), 83-89. https://doi.org/10.26565/2222-5617-2018-28-10