Luminescence and scintillation characteristics of (GdxY3-x)Al2Ga3O12:Ce (x = 1,2,3) single crystals

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

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

The luminescence and scintillation characteristics of Czochralski-grown (GdxY3-x)Al2Ga3O12:Ce (x = 1,2,3) single crystals are presented. With increasing Gd content in this garnet host, the 5d2 absorption band was blue-shifted while the 5d1 absorption and 5d1 → 4f emission bands were red-shifted due to an increase in the crystal field splitting of the 5d levels. In addition, the luminescence quenching temperature of the Ce3+emission and activation energy for thermal quenching decreased with increasing Gd content. The Gd3+ → Ce3+ energy transfer was evidenced by photoluminescence excitation spectra of Ce3+ emission. At 662 keV γ - rays, the light yield (LY) of 48,600 ph/MeV and energy resolution of 6.5% was measured for a Gd3Al2Ga3O12:Ce crystal. Scintillation decay measurements were performed using the time-correlated single photon counting technique. Superior time resolution of Gd3Al2Ga3O12:Ce is due to its high LY and fast scintillation response. The total mass attenuation coefficients at 60 and 662 keV γ - rays were also determined.

Original languageEnglish
Pages (from-to)162-168
Number of pages7
JournalOptical Materials
Volume76
DOIs
Publication statusPublished - 2018 Feb

Keywords

  • (Gd,Y)AlGaO:Ce
  • Energy resolution
  • Luminescence
  • Scintillation decay
  • Time resolution

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

Fingerprint

Dive into the research topics of 'Luminescence and scintillation characteristics of (Gd<sub>x</sub>Y<sub>3-x</sub>)Al<sub>2</sub>Ga<sub>3</sub>O<sub>12</sub>:Ce (x = 1,2,3) single crystals'. Together they form a unique fingerprint.

Cite this