| CsI-LiCl共晶材料的坩埚下降法生长与闪烁性能研究 |
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| 引用本文： | 颜欣龙,石肇基,彭晨,王瑞,杨帆.CsI-LiCl共晶材料的坩埚下降法生长与闪烁性能研究[J].人工晶体学报,2021,50(3):410-415. |
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| 作者姓名： | 颜欣龙 石肇基 彭晨 王瑞 杨帆 |
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| 作者单位： | 南开大学物理科学学院,天津 300071 |
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| 基金项目： | 国家自然科学基金(11775120); 天津市自然科学基金(18JCYBJC17800) |
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| 摘 要： | 本文采用坩埚下降法,在真空密封的石英坩埚中成功生长出CsI-LiCl与CsI-LiCl:Na共晶闪烁体。通过扫描电子显微镜(SEM)观察晶体微结构表明该共晶中LiCl相与CsI相存在周期性的层状排列,CsI相的厚度在5 μm左右。共晶样品的X射线激发发射谱显示在CsI-LiCl和CsI-LiCl:Na共晶样品存在缺陷发光,在CsI-LiCl样品中还观察到了纯CsI的自陷激子(STE)发光。CsI-LiCl样品在α粒子激发下的多道能谱中观察到明显的全能峰,这一结果证明CsI-LiCl共晶可用于热中子探测的潜力。
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| 关 键 词： | 闪烁体 CsI LiCl 共晶 坩埚下降法 中子 探测 |
| 收稿时间： | 2021-01-04 |
Growth and Scintillation Characterization of CsI-LiCl Eutectic Material by Bridgman Method |
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| YAN Xinlong,SHI Zhaoji,PENG Chen,WANG Rui,YANG Fan.Growth and Scintillation Characterization of CsI-LiCl Eutectic Material by Bridgman Method[J].Journal of Synthetic Crystals,2021,50(3):410-415. |
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| Authors: | YAN Xinlong SHI Zhaoji PENG Chen WANG Rui YANG Fan |
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| Affiliation: | School of Physical, Nankai University, Tianjin 300071, China |
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| Abstract: | CsI-LiCl and CsI-LiCl:Na eutectic scintillators were successfully grown in a vacuum-sealed quartz crucible by vertical Bridgman method. The periodic lamellar microstructure of the crystal was observed by SEM with the CsI phase of 5 μm thickness. The X-ray excitation luminescence spectra show that the luminescence of CsI-LiCl and CsI-LiCl:Na eutectic is mainly attributed to the oxygen induced defects luminescence. And the STE luminescence of pure CsI is observed in the CsI-LiCl eutectic. Full energy peak is observed in the α particle excited multi-channel energy spectrum of CsI-LiCl eutectic, which indicates that the eutectic has potential thermal neutron detection ability. |
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| Keywords: | scintillator CsI LiCl eutectic Bridgman method neutron detection |
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