Scintillation properties of Gd3(Al5-xGax)O12:Ce (x = 2.3, 2.6, 3.0) single crystals

Warut Chewpraditkul, Nakarin Pattanaboonmee, Ongsa Sakthong, Weerapong Chewpraditkul, Tomasz Szczesniak, Marek Moszynski, Kei Kamada, Shunsuke Kurosawa, Akira Yoshikawa, Martin Nikl

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4 Citations (Scopus)

Abstract

Scintillation properties of Czochralski-grown Gd3(Al5-xGax)O12:Ce (x = 2.3, 2.6, 3.0) single crystals were investigated. With increasing Ga content in garnet host, the radioluminescence band due to 5d1 → 4f emission transition was blue-shifted due to a decrease in the crystal field splitting of the 5 d levels. At 662 keV γ rays, the LY value of 47,000, 55,100 and 51,900 ph/MeV was obtained for Gd3Al2.7Ga2.3O12:Ce, Gd3Al2.4Ga2.6O12:Ce and Gd3Al2Ga3O12:Ce, respectively. In spite of a lower LY value, Gd3Al2.7Ga2.3O12:Ce shows good energy resolution of 4.1% due to its proportionality of LY. The ratio of LY values under excitation with α- and γ-rays (α/γ ratio) was also determined. The fast component decay time with relative intensity of 146 ns (66%), 142 ns (76%) and 112 ns (76%) was measured in the scintillation decay of Gd3Al2.7Ga2.3O12:Ce, Gd3Al2.4Ga2.6O12:Ce and Gd3Al2Ga3O12:Ce, respectively. Good coincidence time resolution of Gd3Al2Ga3O12:Ce is due to a high initial photon emission rate.

Original languageEnglish
Pages (from-to)23-29
Number of pages7
JournalOptical Materials
Volume81
DOIs
Publication statusPublished - 2018 Jul 1

Keywords

  • Coincidence time resolution
  • Energy resolution
  • Gd(Al,Ga) O:Ce
  • Light yield
  • Nonproportionality of light yield
  • Scintillation decay

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering

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    Chewpraditkul, W., Pattanaboonmee, N., Sakthong, O., Chewpraditkul, W., Szczesniak, T., Moszynski, M., Kamada, K., Kurosawa, S., Yoshikawa, A., & Nikl, M. (2018). Scintillation properties of Gd3(Al5-xGax)O12:Ce (x = 2.3, 2.6, 3.0) single crystals. Optical Materials, 81, 23-29. https://doi.org/10.1016/j.optmat.2018.05.015