Comparative study of CsBr:Tl transparent ceramic and single crystal for radiation detector applications
Comparative study of CsBr:Tl transparent ceramic and single crystal for radiation detector applications
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用于辐射探测器应用的 CsBr:Tl 透明陶瓷和单晶的比较研究
DOI:
10.1016/j.nima.2018.09.061
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Yanagida Takayuki
中科院分区:
文献类型:
--
作者:
Kimura Hiromi;Kato Takumi;Nakauchi Daisuke;Okada Go;Kawaguchi Noriaki;Yanagida Takayuki
In this study, a CsBr single crystal was grown by the vertical Bridgman–Stockbargermethod, and CsBr transparent ceramic was made by spark plasma sintering. Then, these materials were investigated on the optical, scintillation and thermally-stimulated luminescence (TSL) properties. Regarding the scintillation properties, both the samples show two emission bands peaking around 360 and 500 nm. The origins of the emissions are due to 3 P 1→ 1 S 0 transitions of Tl+ ion and off-center self-trap exciton, respectively. For the crystal sample, the scintillation light yield estimated is 23,000 ph/MeV with a typical error of±10% under 137 Cs exposure, and the scintillation response demonstrated a good linearity against γ-ray energies of 109 Cd (22 and 88 keV), 57 Co (122 keV), 133 Ba (356 keV), 22 Na (511 and 1274 keV) and 137 Cs (662 keV) sources. As the TSL properties, when the heating rate was 1° C/s TSL glow curves of the crystal and ceramic samples show major peak around 100° C. The TSL dose responses of these samples have a good linearity from 0.01 mGy to 1000 mGy.
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