Performance Evaluation of Liquinert-Processed CeBr Crystals Coupled with a Multipixel Photon Counter

Yutaka Otaka, Kenji Shimazoe, Yuki Mitsuya, Mizuki Uenomachi, Foong Wei Seng, Kei Kamada, Akira Yoshikawa, Shiro Sakuragi, Tim Binder, Hiroyuki Takahashi

研究成果: Article査読

4 被引用数 (Scopus)


Ce-doped scintillators are capable of shortening the time constant as the luminescence is caused by 5d to 4f transition of Ce3+. A scintillator with a short-time constant is suitable for time-of-flight (TOF)-positron emission tomography (PET). In this article, we conducted an evaluation of the energy resolution and coincidence resolving time (CRT) of Liquinert-processed cerium (III) bromide (CeBr3), which possesses a short-time constant and has a high light yield, using multipixel photon counter (MPPC) as a photon detector. The results indicate that an energy resolution of 5.02% (full width at half maximum (FWHM)) can be obtained from a 5-mm × 5-mm × 5-mm-CeBr3 cube coupled with a 6.0-mm × 6.0-mm-pitch MPPC. Furthermore, a CRT of 97.0 ps (FWHM) was achieved using a 3-mm × 3-mm × 1-mm-CeBr3 array coupled with a 3.0-mm × 3.0-mm-pitch through-silicon-via MPPC array, which has been proven effective for TOF-PET and Compton imaging. Moreover, a CRT of 198.7 ps (FWHM) was obtained using a current comparing type time-over-threshold circuit as a front-end readout application. We also determined that the energy resolution is independent of the shaping time but depends on the temperature. In addition, the CRT was found to be dependent on the frequency bandwidth of the signal measuring instrument.

ジャーナルIEEE Transactions on Nuclear Science
出版ステータスPublished - 2020 6月

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 原子力エネルギーおよび原子力工学
  • 電子工学および電気工学


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