Scintillator-oriented combinatorial search in Ce-doped (Y,Gd) 3(Ga,Al) 5O 12 multicomponent garnet compounds

K. Kamada, T. Yanagida, Jan Pejchal, M. Nikl, T. Endo, K. Tsutumi, Y. Fujimoto, A. Fukabori, A. Yoshikawa

Research output: Contribution to journalArticlepeer-review

156 Citations (Scopus)

Abstract

Ce-doped (Y yGd 1y) 3(Ga xAl 1x) 5O 12(x=0, 1, 2, 3, 4 and y=1, 2, 3) single crystals are grown by the micro-pulling down method. X-ray diffraction and electron probe microanalysis techniques are employed to check their structure and chemical composition, respectively. Optical and photoluminescence characteristics are measured and radioluminescence spectra, light yield and scintillation decay measurements are further made to evaluate the scintillation performance. We show that balanced Gd and Ga admixture in the Y 3Al 5O 12 structure can considerably increase the scintillation efficiency, and the spectrally corrected light yield value exceeds 44000photonMeV 1. Scintillation decay times approach that of Ce 3+ photoluminescence decay and an additional less intense slower component is also observed. Physical aspects of energy transfer process and 5d 1 excited state depopulation are discussed. The micro-pulling down technique is shown as an ideal tool for a directed combinatorial search for targeted single crystal compositions to reveal those with the highest figure-of-merit for a given application field.

Original languageEnglish
Article number505104
JournalJournal of Physics D: Applied Physics
Volume44
Issue number50
DOIs
Publication statusPublished - 2011 Dec 21

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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