Development of Composite Scintillators Based on Single Crystalline Films and Crystals of Ce3+-Doped (Lu,Gd)3(Al,Ga)5O12 Mixed Garnet Compounds

S. Witkiewicz-Lukaszek, V. Gorbenko, T. Zorenko, O. Sidletskiy, I. Gerasymov, A. Fedorov, A. Yoshikawa, J. A. Mares, M. Nikl, Yu Zorenko

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15 Citations (Scopus)

Abstract

The possibility of growth by the liquid phase epitaxy method of a new type of advanced composite scintillator based on Ce3+-doped single crystalline films (SCFs) of Lu1.5Gd1.5Al1.5Ga3.5O12 garnet and substrates from single crystals (SCs) of Gd3Al2.5Ga2.5O12:Ce garnet is evidenced for the first time in this work. We show the possibility of the simultaneous registration of α-particles and γ-quanta by way of separation of the scintillation pulse height spectra and decay kinetics of SCF and crystal parts of such a composite scintillator. Namely, the significant differences in the scintillation decay kinetics of Lu1.5Gd1.5Al1.5Ga3.5O12:Ce SCF/Gd3Al2.5Ga2.5O12:Ce SC composite scintillator under excitation by α-particles of a 241Am (5.5 MeV) source and γ-quanta of 137Cs (662 keV) source are observed. The respective tα/tγ decay times ratio in the 0-500 ns range reach up to 0.5 for this type of composite scintillator; e.g., the SCF scintillators is two times faster than the substrate scintillator. For this reason, such a type of composite scintillator can be successfully applied for the separation of the signals coming from its film and crystal parts at the registration of the mixed radiation fluxes of α-particles and γ-quanta.

Original languageEnglish
Pages (from-to)1834-1842
Number of pages9
JournalCrystal Growth and Design
Volume18
Issue number3
DOIs
Publication statusPublished - 2018 Mar 7

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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