Crystal growth, luminescence and scintillation properties of mixed Ce:Cs2LiLaxY1-xCl6 (0 < x ≤ 0.4) scintillators
Crystal growth, luminescence and scintillation properties of mixed Ce:Cs2LiLaxY1-xCl6 (0 < x ≤ 0.4) scintillators
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DOI：
10.1016/j.jlumin.2018.04.062
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发表时间：
2018-09
影响因子：
3.6
通讯作者：
S. Pan;Peng Zhang;Hebing Zhu;Jianyu Zhang;J. Pan;Hongbing Chen;G. Ren;Huanying Li
中科院分区：
文献类型：
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作者：
S. Pan;Peng Zhang;Hebing Zhu;Jianyu Zhang;J. Pan;Hongbing Chen;G. Ren;Huanying Li
Ce:Cs2LiYCl6（CLYC）晶体是一种可销售的卤化物无机闪烁体，具有非常高的产光率，优异的能量分辨率和伽马射线和热中子之间的脉冲形状识别能力。虽然Ce:Cs2LiLaCl6（CLLC）晶体的闪烁性能优于CLYC晶体，但晶体生长困难制约了其应用前景。为了利用La3+卤化物的优势，对Ce:Cs2LiLaxY1-xCl6（0 < x ≤ 0.4）晶体的生长进行了研究。采用垂直Bridgman法生长x = 0.05、0.1、0.2、0.4的Ce: cs2lilaxy1 - xcl6，成功获得透明Ce: cs2lila0.1 y0.9 cl6样品。用粉末x射线衍射图对生长晶体的结构和组成进行了表征。研究了混合elpasolite Ce:Cs2LiLaxY1-xCl6（0 < x ≤ 0.4）晶体的发光和闪烁特性。最后，发现Ce: cs2lila0.1 y0.9 cl6是一种非常有前途的伽马射线和热中子闪烁体，具有较高的光学质量，可接受的能量分辨率和相对较快的衰减时间。
Ce:Cs2LiYCl6(CLYC) crystal is a marketable halide inorganic scintillator with very high light yield, excellent energy resolution and pulse-shape discrimination between gamma rays and thermal neutrons. Although the scintillation performance of Ce:Cs2LiLaCl6(CLLC) crystal is better than CLYC crystal, the promising application was restricted by the crystal growth difficulties. To utilize the advantage of La3+halide, research on the growth of Ce:Cs2LiLaxY1-xCl6(0 < x ≤ 0.4) crystals were undertaken. The Ce:Cs2LiLaxY1-xCl6with x = 0.05, 0.1, 0.2 and 0.4 were grown by the vertical Bridgman technique, and transparent Ce:Cs2LiLa0.1Y0.9Cl6samples were successfully obtained. The crystal structure and composition of the as-grown crystals were characterized by powder x-ray diffraction patterns. The luminescence and scintillation properties of the mixed elpasolites Ce:Cs2LiLaxY1-xCl6(0 < x ≤ 0.4) crystals were also investigated. Finally, it was found that Ce:Cs2LiLa0.1Y0.9Cl6is a very promising gamma-rays and thermal neutrons scintillator with relatively high optical quality grown from vertical Bridgman method, acceptable energy resolution and relatively fast decay time.