New intrinsic scintillator with large effective atomic number: Tl2HfCl6 and Tl2ZrCl6 crystals for x-ray and gamma-ray detections

Yutaka Fujimoto, Keiichiro Saeki, Daisuke Nakauchi, Takayuki Yanagida, Masanori Koshimizu, Keisuke Asai

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


We report on the photoluminescence and scintillation characterizations of new Tl2HfCl6 and Tl2ZrCl6 crystalline scintillators grown by the vertical Bridgman-Stockbarger method. Both Tl2HfCl6 and Tl2ZrCl6 crystals showed an intrinsic emission band peak at 450-470 nm under UV light and X-ray excitations. The scintillation light yields of Tl2HfCl6 and Tl2ZrCl6 reach 24200 and 50800 photons/MeV, respectively. Their energy resolutions at 662 keV are 17.7% for Tl2HfCl6 and 5.6% for Tl2ZrCl6. The scintillation decay time values of Tl2HfCl6 are 288 and 6340 ns; meanwhile, those of Tl2ZrCl6 are 696 and 2360 ns.

Original languageEnglish
Pages (from-to)1577-1583
Number of pages7
JournalSensors and Materials
Issue number7
Publication statusPublished - 2018


  • Crystal growth
  • Scintillator
  • TlHfCl
  • TlZrCl

ASJC Scopus subject areas

  • Instrumentation
  • Materials Science(all)

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