Scintillation properties of Gd3Al2Ga3O12:Ce, Li and Gd3Al2Ga3O12:Ce, Mg single crystal scintillators: A comparative study
Scintillation properties of Gd3Al2Ga3O12:Ce, Li and Gd3Al2Ga3O12:Ce, Mg single crystal scintillators: A comparative study
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DOI：
10.1016/j.optmat.2019.04.023
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发表时间：
2019-06
影响因子：
3.9
通讯作者：
W. Chewpraditkul;N. Pattanaboonmee;O. Sakthong;K. Wantong;W. Chewpraditkul;A. Yoshikawa;K. Kamada
中科院分区：
文献类型：
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作者：
W. Chewpraditkul;N. Pattanaboonmee;O. Sakthong;K. Wantong;W. Chewpraditkul;A. Yoshikawa;K. Kamada
比较了Gd_3Al_2Ga_3 O_（12）：Ce，Li（GAGG：Ce，Li）和Gd_3Al_2Ga_3 O_（12）：Ce，Mg（GAGG：Ce，Mg）单晶的闪烁特性。在77 ~ 500 K的温度范围内测量了样品的辐射发光光谱和光致发光衰减曲线，研究了热致发光的猝灭现象。在662 keV γ射线下，GAGG：Ce，Li的LY值为35，400光子/MeV，能量分辨率为6.9%，上级GAGG：Ce，Mg的LY值24，200光子/MeV和9.5%。闪烁衰减近似为双指数，其中GAGG：Ce，Mg的快主衰减分量为47 ns（83%），GAGG：Ce，Li的快主衰减分量为90 ns（86%）。GAGG：Ce，Mg的符合时间分辨为282 ps，优于GAGG：Ce，Li的389 ps。GAGG：Ce，Mg的余辉和热释光强度比GAGG：Ce，Li低得多。
The scintillation characteristics of Gd3Al2Ga3O12:Ce, Li (GAGG:Ce,Li) and Gd3Al2Ga3O12:Ce, Mg (GAGG:Ce,Mg) single crystals were compared. Radioluminescence spectra and photoluminescence decay curves were measured at various temperatures between 77 and 500 K to investigate the thermal luminescence quenching. At 662 keV γ rays, the LY value of 35,400 photons/MeV and energy resolution of 6.9% obtained for GAGG:Ce, Li are superior to those of 24,200 photons/MeV and 9.5% for GAGG:Ce,Mg. Scintillation decays are approximated by a double exponentials with a fast principal decay component of 47 ns (83%) for GAGG:Ce, Mg and 90 ns (86%) for GAGG:Ce,Li. Coincidence time resolution of 282 ps obtained for GAGG:Ce, Mg is better than that of 389 ps for GAGG:Ce,Li. GAGG:Ce, Mg shows a much lower afterglow and thermally stimulated luminescence intensity with respect to GAGG:Ce,Li.