Scintillation properties of transparent Lu3Al5O12 (LuAG) ceramics doped with different concentrations of Pr3
Scintillation properties of transparent Lu3Al5O12 (LuAG) ceramics doped with different concentrations of Pr3
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DOI：
10.1002/pssc.201000623
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
T. Yanagida;A. Fukabori;Y. Fujimoto;A. Ikesue;K. Kamada;J. Kataoka;Y. Yokota;A. Yoshikawa;V. Chani
中科院分区：
文献类型：
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作者：
T. Yanagida;A. Fukabori;Y. Fujimoto;A. Ikesue;K. Kamada;J. Kataoka;Y. Yokota;A. Yoshikawa;V. Chani
讨论了通过烧结法生产的掺镨（0.2 mol%、0.6 mol%、1 mol% 和 2 mol%）Lu3Al5O12 (LuAG) 闪烁体透明陶瓷。这些材料被切割成物理尺寸为 5 × 5 × 2 mm3 的样品。还用直拉法生长的 Pr:LuAG 单晶制备了类似尺寸的样品，以比较闪烁特性。评估了它们的透射率和放射发光光谱。所有样品在300 nm以上的波长范围内均具有高度透明性，并且在X射线激发下在310和370 nm附近检测到强烈的Pr3+ 5d-4f发射。在137Csγ射线照射下，每个样品中也清晰地观察到2keV光吸收峰。 Pr 0.6 mol% 掺杂的 LuAG 陶瓷表现出陶瓷中可实现的最高光产额，并且是单晶中观察到的光产额的一半。在脉冲X射线激发下，当Pr浓度增加时，衰减时间常数变得更快，并且。在 2 mol% 掺杂陶瓷中注意到最快的衰减（~5.7 ns 时间常数）。 （© 2011 WILEY-VCH Verlag GmbH & Co. KGaA，魏因海姆）
Transparent ceramics of Pr-doped (0.2 mol%, 0.6 mol%, 1 mol%, and 2 mol%) Lu3Al5O12 (LuAG) scintillators produced by the sintering method are discussed. These materials were cut to the specimens with physical dimensions of 5 × 5 × 2 mm3. Similar size specimens were also prepared from Czochralski grown Pr:LuAG single crystals to compare scintillation properties. Their transmittance and radio luminescence spectra were evaluated. All specimens were highly transparent in wavelength range above 300 nm, and intense Pr3+ 5d-4f emission was detected around 310 and 370 nm under excitation with X-ray. Under 137Cs γ-ray is irradiation, 2 keV photo-absorption peaks were also clearly observed in each sample. The Pr 0.6 mol% doped LuAG ceramics demonstrated highest light yield achievable among the ceramics, and it was half of that observed in the single crystals. Under pulse X-ray excitation, the decay time constants became faster when Pr concentration increased, and. the fastest decay (∼5.7 ns time constant) was noticed in the 2 mol% doped ceramic. (© 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)