Scintillation properties of Ce-doped SrF2-Al2O3-B2O3 glasses

Scintillation properties of Ce-doped SrF2-Al2O3-B2O3 glasses
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Ce掺杂SrF2-Al2O3-B2O3玻璃的闪烁性能

DOI:
10.1016/j.jnoncrysol.2018.11.020
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发表时间:
2019
影响因子:
3.5
通讯作者:
Yanagida Takayuki
Yanagida Takayuki
中科院分区:
材料科学2区
文献类型:
--
作者:
Kimura Hiromi;Shinozaki Kenji;Okada Go;Kawaguchi Noriaki;Yanagida Takayuki

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采用传统的熔融淬火方法合成了xCeF3掺杂(30-x)SrF2-20Al2O3-50B2O3玻璃(x=0.1、1.0、5.0和10mol%),然后进行了闪烁体应用的表征。关于光致发光(PL)特性,该玻璃在约325nm的激发下显示出约360nm的宽发射带,并且衰减时间常数为几十纳秒。从结果来看,起源归因于Ce3+的5d→4f跃迁。作为闪烁特性,X 射线诱导闪烁光谱和衰减时间常数与 PL 相当一致。目前的玻璃样品中,掺杂1% Ce 时闪烁强度最高。 1%Ce掺杂玻璃在57Co 122keV γ射线照射下的光产额显示为240光子/MeV。光输出是相对于商用 GS20 玻璃闪烁体的相对值得出的。这是关于 Ce 掺杂 SrF2-Al2O3-B2O3 玻璃闪烁光产率的第一份报告。此外,该材料还表现出热受激发光(TSL)特性,主发光峰在80°C左右,0.1%和1.0% Ce掺杂玻璃对辐射剂量的敏感性低至0.1mGy,并在100mGy下具有良好的线性度。
xCeF3-doped (30-x)SrF2-20Al2O3-50B2O3glasses (x= 0.1, 1.0, 5.0 and 10 mol%) were synthesized by the conventional melt quenching method, and then characterizations for scintillator applications were performed. Regarding the photoluminescence (PL) properties, the glasses show a broad emission band around 360 nm under excitation of approximately 325 nm, and the decay time constant is several tens of nano-seconds. From the results, the origin is attributed to the 5d → 4f transitions of Ce3+. As scintillation properties, the X-ray induced scintillation spectra and decay time constants are reasonably consistent with the PL. Among the present glass samples, the scintillation intensity is the highest when doped with 1% Ce. The light yields of the 1% Ce-doped glass shows 240 photons/MeV under57Co 122 keV γ-ray exposure. The light yields were derived as relative values to that of commercial GS20 glass scintillator. This is the first report on the scintillation light yields of Ce-doped SrF2-Al2O3-B2O3glasses. Furthermore, the materials also exhibit thermally stimulated luminescence (TSL) properties with a major glow peak around 80 °C, and the sensitivity to radiation dose is as low as 0.1 mGy for the 0.1% and 1.0% Ce-doped glasses with a good linearity confirmed to 100 mGy.
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