CsI-LiCl共晶材料的坩埚下降法生长与闪烁性能研究

人工晶体学报 ›› 2021, Vol. 50 ›› Issue (3): 410-415.

CsI-LiCl共晶材料的坩埚下降法生长与闪烁性能研究

颜欣龙, 石肇基, 彭晨, 王瑞, 杨帆

南开大学物理科学学院,天津 300071

收稿日期:2021-01-04 出版日期:2021-03-15 发布日期:2021-04-15
通信作者: 杨帆,副教授。E-mail:fan@nankai.edu.cn
作者简介:颜欣龙(1996—),男,山东省人,硕士研究生。E-mail:2120180163@mail.nankai.edu.cn
基金资助:
国家自然科学基金(11775120); 天津市自然科学基金(18JCYBJC17800)

Growth and Scintillation Characterization of CsI-LiCl Eutectic Material by Bridgman Method

YAN Xinlong, SHI Zhaoji, PENG Chen, WANG Rui, YANG Fan

School of Physical, Nankai University, Tianjin 300071, China

Received:2021-01-04 Online:2021-03-15 Published:2021-04-15

摘要/Abstract

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。

关键词: 闪烁体, CsI, LiCl, 共晶, 坩埚下降法, 中子, 探测

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.

Key words: scintillator, CsI, LiCl, eutectic, Bridgman method, neutron, detection

中图分类号:

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.

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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