Development of a novel red-emitting cesium hafnium iodide scintillator

Shohei Kodama, Shunsuke Kurosawa, Maki Ohno, Akihiro Yamaji, Masao Yoshino, Jan Pejchal, Robert Král, Yuji Ohashi, Kei Kamada, Yuui Yokota, Martin Nikl, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


Cesium hafnium iodide (CHI) was reported as a novel red-emitting scintillator in our previous article, while optimization of the crystal quality and evaluation of the scintillation performance were insufficient. In this study, a large and transparent CHI single crystalline specimen was obtained using slow crystal growth speed. Coupled with a Si avalanche photo-diode, the full width at half maximum energy resolution was evaluated to be 4.2 ± 0.2% at 662 keV which was the best value among conventional red-emitting scintillators. The scintillation light output, non-proportional response of light output and scintillation decay were also evaluated with a photomultiplier tube.

Original languageEnglish
Pages (from-to)54-58
Number of pages5
JournalRadiation Measurements
Publication statusPublished - 2019 May


  • High effective atomic number material
  • Red-emitting scintillator
  • Si-APD
  • Single crystalline scintillator


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