Growth and luminescent properties of Cs2HfCl6 scintillators doped with alkaline earth metals

Shohei Kodama, Shunsuke Kurosawa, Jan Pejchal, Robert Kral, Akihiro Yamaji, Yuji Ohashi, Yuui Yokota, Kei Kamada, Martin Nikl, Akira Yoshikawa

研究成果: Article査読

5 被引用数 (Scopus)

抄録

Nondoped Cs2HfCl6 (CHC) and alkaline earth metal-doped CHC (AE:CHC) crystals were grown by the vertical Bridgman-Stockbarger method. The spectra of the AE:CHC under X-ray excitation were similar to those for the AE-free crystal; thus, AE doping did not change emission wavelength of CHC. We determined the light outputs and energy resolutions of nondoped CHC and AE:CHC by measuring pulse-height spectra under 662-keV gamma-ray excitation of a 137Cs source. Both light output and energy resolution were deteriorated with AE doping. For example, nondoped CHC had a light output of 44 000 photons/MeV and energy resolution of 5.2%; on the other hand, Sr 0.5 at.%-doped CHC had a light output of only 28 000 photons/MeV and energy resolution of 10%. Scintillation decay also did not change. The nonproportional response values of light output versus gamma-ray energy did not improve in AE:CHC either. Therefore, doped AEs can be responsible for creation of defect trap levels which would hamper the carrier transport in CHC structure.

本文言語English
論文番号8387801
ページ(範囲)2169-2173
ページ数5
ジャーナルIEEE Transactions on Nuclear Science
65
8
DOI
出版ステータスPublished - 2018 8

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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