(Gd_(0.99-x)Y_(x)Ce_(0.01))_(2)Si_(2)O_(7)晶体的生长及发光特性  

Growth and Crystal Luminescence Properties of Cerium Doped Yttrium-Gadolinium Pyrosilicate

作　　者：黄诗敏 万欢欢[1] 杨帆[2] 冯鹤[1] HUANG Shimin;WAN Huanhuan;YANG Fan;FENG He(School of Material Science and Engineering,Shanghai University,Shanghai 200444,China;Scool of Physical,Nankai University,Tianjin 300071,China)

机构地区：[1]上海大学材料科学与工程学院,上海200444 [2]南开大学物理学院,天津300071

出　　处：《人工晶体学报》2021年第10期1951-1956,共6页Journal of Synthetic Crystals

基　　金：National Natural Science Foundation of China(12175130,11875187,11775120)。

摘　　要：通过光学浮区法制备了铈掺杂焦硅酸钇钆(Gd_(0.99-x)Y_(x)Ce_(0.01))_(2)Si_(2)O_(7)(x=0.1,0.2,0.3,0.4,0.5,0.6,0.7)(简写为GYPS∶Ce)闪烁晶体,并用X射线衍射(XRD)进行了物相识别,发现其属于正交晶系Pna21。通过真空紫外(VUV)激发和发射光谱、光致发光(PL)衰减曲线、X射线激发发射(XEL)光谱、γ射线脉冲高度谱等表征了它们的光致发光特性和闪烁特性。VUV和XEL光谱的发射峰均位于360 nm左右,对应于5d→4f跃迁。样品的PL衰减时间在29.1~32.9 ns之间;闪烁衰减时间快分量约为28~68 ns,慢分量约为256~583 ns。晶体存在Gd^(3+)→Ce^(3+)的能量传递行为。Novel cerium doped(Gd_(0.99-x)Y_(x)Ce_(0.01))_(2)Si_(2)O_(7)(x=0.1,0.2,0.3,0.4,0.5,0.6,0.7)(GYPS∶Ce)scintillation crystals were grown by optical floating zone method,and phase identifications were carried out by X-ray diffraction(XRD).It belongs to orthorhombic of Pna21.Their photoluminescence(PL)and scintillation properties of as-grown crystals were characterized through vacuum ultra-violet(VUV)excitation and emission spectra,PL decay curves,X-ray excitation luminescence(XEL)spectra,γ-ray pulse height spectra.The emission peaks of VUV and XEL spectra all locate around 360 nm corresponding to 5d→4f transition.The PL decay time of as grown samples are in the range of 29.1 ns to 32.9 ns.The scintillation decay time components are in the range of 28 ns to 68 ns and 256 ns to 583 ns.There has energy transfer behavior of Gd^(3+)→Ce^(3+)in crystal.

关 键 词：铈掺杂焦硅酸钇钆 浮区法 光学性能 闪烁晶体 衰减时间 光致发光 

分 类 号：O734[理学—晶体学]