溶质化学结构对液体闪烁体荧光-闪烁性能的影响研究

辐射防护 ›› 2026, Vol. 46 ›› Issue (1): 10-17.

溶质化学结构对液体闪烁体荧光-闪烁性能的影响研究

柳秉煦^1,2, 李悦², 李乐乐¹, 丁良伟¹, 杨茂¹, 张永强³, 芦伟^1,2, 汪卫华^1,2

1.安徽大学材料科学与工程学院,合肥 230601;
2.安徽大学物质科学与信息技术研究院,合肥 230601;
3.中国科学院合肥物质科学研究院等离子体物理研究所,合肥 230031

收稿日期:2025-05-09 出版日期:2026-01-20 发布日期:2026-02-06
通讯作者: 芦伟。E-mail: weilu0818@ahu.edu.cn
作者简介:柳秉煦 (2004—),男,汉族,安徽大学材料科学与工程学院在读本科生,从事辐射探测材料研究。E-mail:2411564533@qq.com
基金资助:
国家磁约束核聚变能发展研究专项(2024YFE03040004)、安徽省自然科学基金项目(2508085MA019)

Effect of solute chemical structure on fluorescence- scintillation properties of liquid scintillators

LIU Bingxu^1,2, LI Yue², LI Lele¹, DING Liangwei¹, YANG Mao¹, ZHANG Yongqiang³, LU Wei^1,2, WANG Weihua^1,2

1. School of Materials Science and Engineering, Anhui University, Hefei 230601;
2. Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601;
3. Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031

Received:2025-05-09 Online:2026-01-20 Published:2026-02-06

摘要/Abstract

摘要： 液体闪烁体由有机溶剂、闪烁溶质和移波剂组成,具有较强的中子/伽马(n/γ)射线甄别能力、高检测效率和良好的稳定性等优势。闪烁溶质的研究多集中于种类与配比的选择,而对辐射探测灵敏度、n/γ甄别效果影响机理的深入探讨还较少。本文选择了三种化学结构不同的闪烁溶质:2,5-二苯基噁唑(PPO)、2,5-双(5-叔丁基-2-苯并噁唑基)噻吩(BBOT)和1,4-双(苯并噁唑-2-基)萘(KCB),配制了相应的液体闪烁体,系统地测试了紫外吸收光谱、荧光发射光谱、闪烁计数率和 n/γ 射线甄别性能,通过分子模拟和实验测量来研究其机理。结果表明,当溶质的HOMO→LUMO轨道能隙小、共轭性好时,可提高闪烁体的辐射探测灵敏度,氢原子占比高、有能够提供孤对电子的原子,则可提高n/γ射线甄别能力。该研究成果可为进一步优化液体闪烁体的计数灵敏度与n/γ甄别效力提供有意义的指导。

关键词: 液体闪烁体, 辐射检测, 化学结构, 荧光, n/γ射线甄别

Abstract: Liquid scintillators, composed of organic solvents, scintillating solutes, and phase shifters, offer advantages such as strong neutron/gamma-ray (n/γ) resolution capability, high detection efficiency, and excellent stability. In this study, three chemically distinct scintillator solutes (PPO, KCB, and BBOT) were selected to prepare corresponding liquid scintillators. Systematic measurements of ultraviolet absorption spectra, fluorescence emission spectra, scintillation count rates, and n/γ discrimination performance were conducted. Molecular simulations and experimental measurements were employed to investigate the underlying mechanisms. Results indicate that scintillation counting rates and n/γ discrimination performance reach maximum values when the solute contains strong electron-donating groups, a high hydrogen atom ratio in transition atoms, and transition groups containing N or O atoms. These findings provide valuable guidance for further optimizing the counting sensitivity and n/γ discrimination efficiency of liquid scintillators.

Key words: liquid scintillator, chemical structure, fluorescence, n/γ discrimination

中图分类号:

柳秉煦, 李悦, 李乐乐, 丁良伟, 杨茂, 张永强, 芦伟, 汪卫华. 溶质化学结构对液体闪烁体荧光-闪烁性能的影响研究[J]. 辐射防护, 2026, 46(1): 10-17.

LIU Bingxu, LI Yue, LI Lele, DING Liangwei, YANG Mao, ZHANG Yongqiang, LU Wei, WANG Weihua. Effect of solute chemical structure on fluorescence- scintillation properties of liquid scintillators[J]. RADIATION PROTECTION, 2026, 46(1): 10-17.

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