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首页> 外文期刊>Crystal growth & design >Growth, Structural Considerations, and Characterization of Ce-Doped (La,Gd)(2)Si2O7 Scintillating Crystals
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Growth, Structural Considerations, and Characterization of Ce-Doped (La,Gd)(2)Si2O7 Scintillating Crystals

机译：Ce掺杂（La，Gd）（2）Si2O7闪烁晶体的生长，结构考虑和表征

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摘要

Ce-doped lantanium-gadolinium pyrosilicate (La,Ce,Gd)(2)Si2O7 (Ce:La-GPS), crystals with various content of rare-earth elements were produced from the melt, and their optimal La/Gd ratio was examined. It was found that Ce:La-GPS single crystals of acceptable optical quality can be produced from the melts ranging from La0.5Gd1.5Si2O7 to La1.0Gd1.0Si2O7 and containing about 1 atom % Ce with respect to the host rare-earths of La and Gd. The crystal growth was performed by the micro-pulling-down and Czochralski methods. The crystals were chemically uniform along the growth axis, and their composition was equal to that of the melt, thus corresponding to vicinity of congruent melting composition. Spatial distribution of Ce in La-GPS was also inspected, and no variation of Ce content was detected as a result of its similarity to one of the host cations (La) regarding the size. Basic optical and scintillation properties of the Ce:La-GPS crystals are also reported, and it is demonstrated that partial substitution of Gd with La has no negative impact on crystal growth and physical performance of the crystals.
机译：掺铈铈镧-焦硅酸盐（La，Ce，Gd）（2）Si2O7（Ce：La-GPS），从熔体中生成具有各种稀土元素含量的晶体，并研究了它们的最佳La / Gd比。已经发现，可以从范围从La0.5Gd1.5Si2O7到La1.0Gd1.0Si2O7的熔体生产具有可接受的光学质量的Ce：La-GPS单晶，并且相对于稀土元素的主体稀土，Ce：La-GPS单晶含有约1原子％的Ce。 La和Gd。晶体生长通过微拉法和切克劳斯基方法进行。晶体沿生长轴化学均匀，并且其组成与熔体的组成相同，因此对应于全熔融组成的附近。还检查了La-GPS中Ce的空间分布，并且没有发现Ce含量的变化，因为Ce的含量与宿主阳离子之一（La）的大小相似。还报道了Ce：La-GPS晶体的基本光学和闪烁特性，并证明了用La部分取代Gd不会对晶体生长和晶体的物理性能产生负面影响。

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