Luminescence and scintillation properties of TlMg(Cl1-xBrx)3 crystals

Miki Arai, Yutaka Fujimoto, Masanori Koshimizu, Hiromi Kimura, Takayuki Yanagida, Keisuke Asai

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13 Citations (Scopus)


Herein, we report the luminescence and scintillation properties of various TlMg(Cl1-xBrx)3 crystals prepared under vacuum via self-seeding solidification. The emission peak wavelengths of the X-ray-induced scintillation spectra for the TlMg(Cl1-xBrx)3 crystals were similar to those of TlMgCl3. Two exponential scintillation decay time components of 19 ns (7%) and 367 ns (93%) were observed. The decay times of TlMg(Cl1-xBrx)3 were similar to those of TlMgCl3. The light yield of TlMg(Cl1-xBrx)3 (x = 0.0168, 59,000 photons/MeV) was higher than that of TlMgCl3 (˜42,000 photons/MeV) and the light yield of TlMg(Cl1-xBrx)3 peaked at 0.5–1.2 mol% and subsequently declined. This is likely due to the decreased trapping of the lattice defects as confirmed by the significantly lower thermoluminescence intensity of TlMg(Cl1–xBrx)3 (x = 0.0168) than that of TlMgCl3. These results indicated that the TlMg (Cl1-xBrx)3 crystalline scintillators could be successfully improved via anion substitution.

Original languageEnglish
Article number110589
JournalMaterials Research Bulletin
Publication statusPublished - 2019 Dec


  • A. Ceramics
  • A. Halides
  • A. Optical materials
  • B. Luminescence
  • D. Phosphors


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