Composition engineering in cerium-doped (Lu,Gd)3(Ga,Al) 5O12 single-crystal scintillators

Kei Kamada, Takanori Endo, Kousuke Tsutumi, Takayuki Yanagida, Yutaka Fujimoto, Akihiro Fukabori, Akira Yoshikawa, Jan Pejchal, Martin Nikl

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352 Citations (Scopus)

Abstract

The Ce-doped (LuyGd1-x)3(Ga y,Al1-y)5O12 single crystals were grown by the micropulling down method. Their structure and chemical composition were checked by X-ray diffraction (XRD) and electron probe microanalysis (EPMA) techniques. Optical, luminescent, and scintillation characteristics were measured by the methods of time-resolved luminescence spectroscopy, including the light yield and scintillation decay. Balanced Gd and Ga admixture into the Lu3Al5O12 structure provided an excellent scintillator where the effect of shallow traps was suppressed, the spectrally corrected light yield value exceeded 40 000 photons/MeV, and scintillation decay was dominated by a 53 ns decay time value which is close to that of Ce 3+ photoluminescence decay. This study provides an excellent example of a combinatorial approach where targeted single-crystal compositions are obtained by a flexible, time saving, and cost-effective crystal growth technique.

Original languageEnglish
Pages (from-to)4484-4490
Number of pages7
JournalCrystal Growth and Design
Volume11
Issue number10
DOIs
Publication statusPublished - 2011 Oct 5

ASJC Scopus subject areas

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

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