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1.中国计量大学 材料与化学学院, 浙江 杭州 310018
2.中国科学院上海硅酸盐研究所 人工晶体研究中心, 上海 201899
[ "刘生伟(1998-),男,安徽安庆人,硕士研究生,2021年于淮北师范大学获得学士学位,主要从事闪烁晶体与核辐射探测材料、发光材料等方向的研究。" ]
[ "魏钦华(1985-),男,浙江宁波人,博士,副教授,2014年于中国科学院上海硅酸盐研究所获得博士学位,主要从事闪烁晶体与核辐射探测材料、发光材料等方向的研究。" ]
收稿日期:2023-09-04,
修回日期:2023-09-23,
纸质出版日期:2023-11-05
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刘生伟,魏钦华,童宇枫等.1 英寸Cs2LiLa(Br,Cl)6∶Ce闪烁晶体的生长及性能[J].发光学报,2023,44(11):1923-1930.
LIU Shengwei,WEI Qinhua,TONG Yufeng,et al.Growth and Properties of 1-inch Cs2LiLa(Br,Cl)6∶Ce Scintillation Crystal[J].Chinese Journal of Luminescence,2023,44(11):1923-1930.
刘生伟,魏钦华,童宇枫等.1 英寸Cs2LiLa(Br,Cl)6∶Ce闪烁晶体的生长及性能[J].发光学报,2023,44(11):1923-1930. DOI: 10.37188/CJL.20230201.
LIU Shengwei,WEI Qinhua,TONG Yufeng,et al.Growth and Properties of 1-inch Cs2LiLa(Br,Cl)6∶Ce Scintillation Crystal[J].Chinese Journal of Luminescence,2023,44(11):1923-1930. DOI: 10.37188/CJL.20230201.
Ce
3+
掺杂的钾冰晶石结构的卤化物闪烁晶体因具有优异的闪烁性能,得到了广泛的关注。本文采用坩埚下降法成功制备了1英寸高质量Ce
3+
掺杂Cs
2
LiLa(Br,Cl)
6
闪烁晶体。通过X射线衍射谱、EDS、X 射线光电子谱等手段对Cs
2
LiLa(Br,Cl)
6
∶Ce晶体的晶体结构和组分进行了分析,结果表明Cl
-
成功掺入基质材料后晶体结构未发生明显变化。光致发光荧光光谱、X射线激发发射光谱、紫外荧光衰减等结果表明,Cl
-
掺杂后未产生新的发光中心,紫外衰减时间约为28 ns。最后测试了晶体在
137
Cs@662 keV的伽马源和
252
Cf源下的能谱,发现晶体具有优异的能量分辨率(4.2%@662 keV)和中子甄别性能(FOM值达到1.9),在核辐射探测领域具有巨大的应用前景。
Because of the excellent scintillation performance, halide scintillation crystals with elpasolite structure doped with Ce
3+
have been attracted wide attention. In this paper, high-quality Ce
3+
doped Cs
2
LiLa(Br,Cl)
6
scintillation crystal with 1-inch size has been prepared successfully by Bridgman method. The crystal structure and composition of Cs
2
LiLa(Br,Cl)
6
∶Ce crystals were analyzed by X-ray diffraction, EDS, and X-ray photoelectron spectroscopy. The results show that the Cl
-
was successfully introduced into the matrix material and the crystal structure was unchanged. The photoluminescence spectra, X-ray excited emission spectra, and ultraviolet fluorescence decay results show that Cl
-
doping did not have a significant effect on luminescence center. It still has a fast decay time of 28 ns. The energy spectra of the crystal were measured under
137
Cs@662 keV gamma source and
252
Cf source. It was found that the crystal had excellent energy resolution (4.2%@662 keV) and neutron discrimination performance (FOM value is 1.9), which had great application prospects in the field of nuclear radiation detection.
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