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摘要:
High transparency Ce3+-doped dense gadolinium aluminum borosilicate (GS(x)) glass scintillator was synthesized in reducing atmosphere by melt-quenching process. The transmittance of the glasses exceeds 80%, and the light attenuation length is between 5-20 cm within the range of 400-600 nm. GS(x) glass shows an photoluminescence (PL) in range of 350-550 nm, with the strongest emission peak around 420 nm. The PL decay time of GS(x) glasses is around 37 ns, with a maximum PL quantum yield of 44.05%. The integrated X-ray excited luminescence (XEL) intensity of GS(S) glass is 52.5% compared with BGO crystal. For X-ray imaging, GS(L) glass based imaging system shows a high spatial resolution of 9 lp/mm, which is comparable to CsI:Tl X-ray detectors. Under gamma-ray, the highest light yield of GS(S) glass is 1235 ph/MeV with an energy resolution of 24.0% at 662 keV, close to that of BSO crystal. The scintillation decay time of GS(x) glasses is consisted of fast (similar to 100 ns) and slow (similar to 560 ns) components. In thermally stimulated luminescence (TSL), GS(S) glass exhibits a strong TSL peak at approximately 440 K, with low intensity shoulders at about 520 K, implying different types of defects and traps. Therefore, GS(x) glass has promising prospects for X-ray imaging and high-energy physics applications.
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来源 :
CERAMICS INTERNATIONAL
ISSN: 0272-8842
年份: 2024
期: 22
卷: 50
页码: 47253-47258
5 . 2 0 0
JCR@2022
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