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首页> 外文期刊>Optical Materials >Crystal growth and scintillation properties of (Na_xCa_1_2xLu_x_yNd_y)F_2 single crystals
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Crystal growth and scintillation properties of (Na_xCa_1_2xLu_x_yNd_y)F_2 single crystals

机译:(Na_xCa_1_2xLu_x_yNd_y)F_2单晶的晶体生长和闪烁特性

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摘要

Na_xCa_1_2xLu_x_yNd_y,F_2 single crystals were grown from the melt using the precise atmosphere control type Micro-Pulling-Down (u-PD) method to investigate their potential as a vacuum-ultraviolet (VUV) scintil-lators. The grown crystals were single-phase materials with fluorite-type structure (Fm-3m, Z - 4) as confirmed by XRD. The crystals demonstrated 80-90% transmittance above 200 nm wavelength and Nd~(3+) 5d-4f luminescence (when exited by X-ray) observed around 185 nm. The radioluminescence measurements under 5.5 MeV a-ray excitation (~241Am) demonstrated the light yield of 48 [Ph/5.5 MeV-α] and the decay time of 6.4-7.7 ns.
机译:使用精确的气氛控制型微下拉(u-PD)方法从熔体中生长Na_xCa_1_2xLu_x_yNd_y,F_2单晶,以研究其作为真空紫外(VUV)闪烁体的潜力。生长的晶体是通过X射线衍射证实的具有萤石型结构(Fm-3m,Z-4)的单相材料。晶体在200 nm波长以上具有80-90%的透射率,在185 nm附近观察到Nd〜(3+)5d-4f发光(当被X射线射出时)。在5.5 MeV a射线激发下(〜241Am)进行的放射性发光测量显示出48 [Ph / 5.5MeV-α]的光产率和6.4-7.7 ns的衰减时间。

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