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

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

doi:10.1016/j.materresbull.2019.110589

Luminescence and scintillation properties of TlMg(Cl_1-xBr_x)₃ crystals

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

ENG - Applied Chemistry

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

Herein, we report the luminescence and scintillation properties of various TlMg(Cl_1-xBr_x)₃ crystals prepared under vacuum via self-seeding solidification. The emission peak wavelengths of the X-ray-induced scintillation spectra for the TlMg(Cl_1-xBr_x)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(Cl_1-xBr_x)₃ were similar to those of TlMgCl₃. The light yield of TlMg(Cl_1-xBr_x)₃ (x = 0.0168, 59,000 photons/MeV) was higher than that of TlMgCl₃ (˜42,000 photons/MeV) and the light yield of TlMg(Cl_1-xBr_x)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(Cl_1–xBr_x)₃ (x = 0.0168) than that of TlMgCl₃. These results indicated that the TlMg (Cl_1-xBr_x)₃ crystalline scintillators could be successfully improved via anion substitution.

Original language	English
Article number	110589
Journal	Materials Research Bulletin
Volume	120
DOIs	https://doi.org/10.1016/j.materresbull.2019.110589
Publication status	Published - 2019 Dec

Keywords

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

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10.1016/j.materresbull.2019.110589

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title = "Luminescence and scintillation properties of TlMg(Cl1-xBrx)3 crystals",

abstract = "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.",

keywords = "A. Ceramics, A. Halides, A. Optical materials, B. Luminescence, D. Phosphors",

author = "Miki Arai and Yutaka Fujimoto and Masanori Koshimizu and Hiromi Kimura and Takayuki Yanagida and Keisuke Asai",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

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doi = "10.1016/j.materresbull.2019.110589",

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journal = "Materials Research Bulletin",

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T1 - Luminescence and scintillation properties of TlMg(Cl1-xBrx)3 crystals

AU - Arai, Miki

AU - Fujimoto, Yutaka

AU - Koshimizu, Masanori

AU - Kimura, Hiromi

AU - Yanagida, Takayuki

AU - Asai, Keisuke

PY - 2019/12

Y1 - 2019/12

N2 - 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.

AB - 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.

KW - A. Ceramics

KW - A. Halides

KW - A. Optical materials

KW - B. Luminescence

KW - D. Phosphors

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ER -

Luminescence and scintillation properties of TlMg(Cl_1-xBr_x)₃ crystals

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