Performance comparison between ceramic Ce: GAGG and single crystal Ce:GAGG with digital-SiPM

C. Park, C. Kim, J. Kim, Y. Lee, Y. Na, Kisung Lee, Jungyeol Yeom

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The Gd3Al2Ga3O12 (Ce:GAGG) is a new inorganic scintillator known for its attractive properties such as high light yield, stopping power and relatively fast decay time. In this study, we fabricated a ceramic Ce:GAGG scintillator as a cost-effective alternative to single crystal Ce:GAGG and, for the first time, investigated their performances when coupled to the digital silicon photomultiplier (dSiPM) - a new type of photosensor designed for applications in medical imaging, high energy and astrophysics. Compared to 3 × 3 × 2 mm3 sized single crystal Ce:GAGG, the translucent ceramic Ce:GAGG, which has a much lower transmittance than the single crystal, was determined to give an output signal amplitude that is approximately 61% of single crystal Ce:GAGG. The energy resolution of the 511 keV annihilation peak of a 22Na source was measured to be 9.9 ± 0.2% and 13.0 ± 0.3% for the single and ceramic scintillators respectively. On the other hand, the coincidence resolving time (CRT) of ceramic Ce:GAGG was 307 ± 23 ps, better than the 465 ± 37 ps acquired with single crystals - probably attributed to its slightly faster decay time and higher proportion of the fast decay component. The ceramic Ce:GAGG may be a promising cost-effective candidate for applications that do not require thick scintillators such as x-ray detectors and charged particle detectors, and those that require time-of-flight capabilities.

Original languageEnglish
Article numberP01002
JournalJournal of Instrumentation
Volume12
Issue number1
DOIs
Publication statusPublished - 2017 Jan 2

Keywords

  • Gamma detectors
  • Particle detectors
  • Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators)
  • X-ray detectors

ASJC Scopus subject areas

  • Instrumentation
  • Mathematical Physics

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