Development of Gamma-Ray Detector Arrays Consisting of Diced Eu-Doped SrI2Scintillator Arrays and TSV-MPPC Arrays

M. Yoshino, M. Yoshino, K. Kamada, K. Kamada, Y. Shoji, Y. Yokota, S. Kurosawa, A. Yamaji, Y. Ohashi, H. Sato, K. Fujieda, J. Kataoka, A. Yoshikawa, A. Yoshikawa, A. Yoshikawa

Research output: Contribution to journalArticlepeer-review


This article presents the development of diced SrI2:Eu arrays and their scintillation properties when coupled with a multipixel photon counter (MPPC) array. Using a dicing technique specific to halide scintillators, a high-energy resolution scintillator array is developed that is cost-effective and widely applicable. The developed SrI2:Eu arrays are of 3 × 3 × 3 mm3/pixel 4 × 4 matrix (TYPE1) and 1 × 1 × 1 mm3/pixel 9 × 9 matrix (TYPE2) structures. We fabricated test gamma-ray detector modules consisting of the TYPE1 and TYPE2 arrays coupled with an MPPC array. The mean peak to valleys ratio is 85.3 ± 14.9 for the TYPE1 array and 38.5 ± 16.6 for the TYPE2 array detector. The average energy resolutions obtained for the TYPE1 and TYPE2 gamma-ray detectors were 5.4 ± 0.4% full-width at half-maximum (FWHM) and 5.2 ± 0.6% FWHM, respectively, for 662-keV gamma-rays. The variation in the signal pulse height of the TYPE1 and TYPE2 detectors was only 10.6% and 10.4% in FWHM, respectively. These results demonstrated that the dicing technique proposed in this article could be applied to hygroscopic halide scintillators.

Original languageEnglish
Article number9061037
Pages (from-to)999-1002
Number of pages4
JournalIEEE Transactions on Nuclear Science
Issue number6
Publication statusPublished - 2020 Jun


  • Energy resolution
  • gamma-ray detectors
  • scintillators
  • solid scintillation detectors

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering

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