大尺寸掺铊碘化钠晶体生长及闪烁性能

人工晶体学报 ›› 2023, Vol. 52 ›› Issue (1): 17-24.

大尺寸掺铊碘化钠晶体生长及闪烁性能

力茂林^1,2, 徐悟生^2,3, 张斌^2,3, 田东升¹, 尹祖荣¹, 张镇玺¹, 贾永超⁴, 徐朝鹏¹

1.燕山大学信息科学与工程学院,河北省特种光纤与光纤传感实验室,秦皇岛 066004;
2.秦皇岛本征晶体科技有限公司,秦皇岛 066000;
3.江苏布拉维光学科技有限公司,张家港 215600;
4.燕山大学环境与化学工程学院,河北省应用化学重点实验室,秦皇岛 066004

收稿日期:2022-09-15 出版日期:2023-01-15 发布日期:2023-02-15
通信作者: 徐悟生,博士。E-mail:wusheng.xu@icc-crystal.com;徐朝鹏,博士,教授。E-mail:xuzhaopeng@ysu.edu.cn
作者简介:力茂林(1994—),男,山西省人,硕士研究生。E-mail:limaolin320@qq.com
基金资助:
中央引导地方科技发展资金(206Z1101G);秦皇岛市科学技术研究与发展计划(202003B008)

Growth and Scintillation Properties of Large Size Thallium-Doped Sodium Iodide Crystals

LI Maolin^1,2, XU Wusheng^2,3, ZHANG Bin^2,3, TIAN Dongsheng¹, YIN Zurong¹, ZHANG Zhenxi¹, JIA Yongchao⁴, XU Zhaopeng¹

1. Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province, School of Information Science and Engineering, Yanshan University, Qinhuangdao 066004, China;
2. Qinhuangdao Intrinsic Crystal Technology Co., Ltd., Qinhuangdao 066000, China;
3. Jiangsu Bravais Optics Technology Co., Ltd., Zhangjiagang 215600, China;
4. Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China

Received:2022-09-15 Online:2023-01-15 Published:2023-02-15

摘要/Abstract

摘要： 采用坩埚下降法,生长了体积为4 L的大尺寸NaI(Tl)晶体。对晶体进行X射线粉末衍射、紫外可见近红外透射光谱测试,结果表明,生长的晶体具有单一的物相,在600~1 600 nm的透过率高于75%。电感耦合等离子体发射光谱测试结果表明,晶体中的Tl离子浓度从头部到尾部逐渐增加。经过锻压、切割、打磨、抛光、封装等工序将NaI(Tl)晶体毛坯制成100 mm×50 mm×400 mm的方形晶体。闪烁性能测试结果表明,在¹³⁷Cs放射源激发下,晶体的平均能量分辨率为7.9%,不同位置的相对光输出和能量分辨率存在一定差异。

关键词: 碘化钠, 闪烁晶体, 坩埚下降法, 晶体生长, 透过率, 能量分辨率, 相对光输出

Abstract: A large NaI(Tl) crystal with a volume of 4 L was grown by Bridgman method. The crystal was tested by X-ray powder diffraction and UV-Visible near-infrared transmission spectroscopy. The results show that the crystal has a single phase and the transmittance is higher than 75% at 600~1 600 nm. The results of inductively coupled plasma emission spectroscopy show that the concentration of Tl ions in the crystal gradually increases from head to tail. After forging, cutting, grinding, polishing and packaging, NaI(Tl) crystal blank was made into square crystal with 100 mm×50 mm×400 mm. The scintillation property measurement shows that the average energy resolution of crystal is 7.9% under the excitation of ¹³⁷Cs radioactive source, and the relative light output and energy resolution at different locations are different.

Key words: NaI, scintillator crystal, Bridgman method, crystal growth, transmittance, energy resolution, relative light output

中图分类号:

O782

力茂林, 徐悟生, 张斌, 田东升, 尹祖荣, 张镇玺, 贾永超, 徐朝鹏. 大尺寸掺铊碘化钠晶体生长及闪烁性能[J]. 人工晶体学报, 2023, 52(1): 17-24.

LI Maolin, XU Wusheng, ZHANG Bin, TIAN Dongsheng, YIN Zurong, ZHANG Zhenxi, JIA Yongchao, XU Zhaopeng. Growth and Scintillation Properties of Large Size Thallium-Doped Sodium Iodide Crystals[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2023, 52(1): 17-24.

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