Luminescent properties of Cr-doped (GdX, Y1 -X)3Al5O12 infra-red scintillator crystals

Akira Suzuki, Shunsuke Kurosawa, Akihiro Yamaji, Yasuhiro Shoji, Jan Pejchal, Kei Kamada, Yuui Yokota, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Cr-doped (GdX Y1-X) 3Al5O12 (X = 0, 0.25, 0.50) crystals prepared by the micro-pulling down method were investigated to develop a infra-red scintillator for implantable patient dosimeter in radiation therapy. In order to evaluate their optical and scintillation performance, the following properties were measured: (i) transmittance between ultra-violet and near-infra red region, (ii) photoluminescence spectra under Xe-lamp excitation, and (iii) X-ray excited radio-luminescence spectra. Cr:Y3Al5O12 and Cr:(Gd0.25 Y0.75)3Al5O 12 crystals showed increased transmittance of 80%, while Cr:(Gd 0.50 Y0.50)3Al5O12 had a lower transmittance of 40% due to its polycrystalline structure. In addition, all the Cr:(GdX Y1-X)3Al 5O12 crystals showed sharp scintillation luminescence peaks ascribed to Cr3+ d-d transitions. Therefore, these results suggested that Cr:Y3Al5O12 and Cr:(Gd 0.25 Y0.75)3Al5O12 crystals can be candidate materials for the dosimeter use.

Original languageEnglish
Pages (from-to)1938-1941
Number of pages4
JournalOptical Materials
Issue number12
Publication statusPublished - 2014 Oct


  • Bulk crystal
  • Cr-doped oxide garnet
  • Infra-red scintillator
  • Patient dosimetry

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering


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