Characterization of GAGG:Ce scintillators with various Al-to-Ga ratio

Pawel Sibczynski, Joanna Iwanowska-Hanke, Marek Moszyński, Lukasz Swiderski, Marek Szawłowski, Martyna Grodzicka, Tomasz Szczęs̈niak, Kei Kamada, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

We have studied the scintillation properties of cerium doped gadolinium aluminum gallium garnet (GAGG:Ce) scintillators with various Al-to-Ga ratio. Having many advantages, like high density (6.63 g/cm 3 ), high light output, fair energy resolution and quite fast decay time, the scintillators are an excellent solution for gamma rays detection. In this paper performance of the GAGG:1%Ce crystals with different Al-to-Ga ratios is presented. The study covered measurements of emission spectra, light output, energy resolution and non-proportionality for each crystal. It was observed that the light output of the recently obtainable crystals varies from 40,000 to 55,000 ph/MeV. Maximum emission wavelength of about 520 nm promotes silicon based photodetectors for use with these scintillators. The best energy resolution of 3.7% at 662 keV, measured with Hamamatsu S8664-1010 APD, was obtained for the sample with the minimum gallium content. This result is close to these obtained with the group of scintillators retaining very good energy resolution, like LaCl 3 and CeBr 3 .

Original languageEnglish
Pages (from-to)112-117
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume772
DOIs
Publication statusPublished - 2015 Feb 11

Keywords

  • Emission spectra
  • Energy resolution
  • GAGG:Ce
  • Gamma spectroscopy
  • Light output
  • Non-proportionality

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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