Cesium hafnium chloride scintillator coupled with an avalanche photodiode photodetector

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Published 14 February 2017 • © 2017 IOP Publishing Ltd and Sissa Medialab srl
, , 18th International Workshop on Radiation Imaging Detectors (IWORID2016) Citation S. Kurosawa et al 2017 JINST 12 C02042 DOI 10.1088/1748-0221/12/02/C02042

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1 New Industry Creation Hatchery Center (NICHe), Tohoku University, 6-6-10 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8579, Japan

2 Department of Physics, Yamagata University, 1-4-12, Kojirakawa-machi, Yamagata 990-8560, Japan

3 Institute for Materials Research (IMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan

4 C&A corporation, 6-6-40 Aza-Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan

5 Institute of Physics, Czech Academy of Sciences, Cukrovarnicka 10, Prague 6, 162 00, Czech Republic

Dates

  1. Received 1 October 2016
  2. Accepted 21 January 2017
  3. Published

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1748-0221/12/02/C02042

Abstract

Optical and scintillation properties of pure Cs2HfCl6 (CHC) single crystals were investigated. In particular, light output and energy resolution were measured using a Si avalanche photodiode (Si-APD), since the Si-APD has sufficient quantum efficiency of around 70 % at emission wavelength region of CHC around 420 nm. This CHC single crystal grown using the vertical Bridgeman method showed light output of 37,000± 2,000 photons/MeV . The FWHM energy resolution was determined to be 3.7± 0.5× (E/662 keV)−0.85± 0.03[%], where E [keV] is the gamma-ray energy. Moreover, the temperature dependence of the light output was stable from −5 to 30 oC, while the light output increased below −10 oC.

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10.1088/1748-0221/12/02/C02042