溶质化学结构对液体闪烁体荧光-闪烁性能的影响研究

Abstract

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

CLC Number:

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.

References

[1] 胡万平, 张贵宇, 张云龙, 等. 中子探测用有机闪烁体的研究进展[J]. 核技术, 2023,46(6):39-52.
HU Wanping, ZHANG Guiyu, ZHANG Yunlong, et al. Research progress of organic scintillators for neutron detection[J]. Nuclear Techniques, 2023,46(6):39-52.
[2] 宋云, 左晶鑫, 梁勇飞, 等. 自研塑料闪烁体探测器中子/γ甄别能力测试[J]. 核技术, 2023,46(3):61-68.
SONG Yun,ZUO Jingxin,LIANG Yongfei. Neutron/gamma discrimination performance test for self-developed plastic scintillation detectors[J]. Nuclear Techniques, 2023,46(3):61-68.
[3] JIA Xingwen, GE Ma, MING Haiyu, et al. Optimized online filter stack spectrometer for ultrashort X-ray pulses[J]. Nuclear Science and Techniques, 2024,35(5):146-159.
[4] 王豫庆, 谭西早, 张少东,等. 高中子伽马甄别性能的液体闪烁体探测器研究[J]. 世界核地质科学, 2024,41(4):832-840.
WANG Yuqing, TAN Xizao, ZHANG Shaodong, et al. High neutron-gamma discrimination liquid scintillation detector[J]. World Nuclear Geoscience, 2024,41(4):832-840.
[5] LI Gang,Ghaouti Bentoumi, LI Liqian. Enhancement of fast neutron detection in liquid scintillator detectors[J]. Nuclear Technology, 2022,208(7):1214-1222.
[6] Bonhomme A, Buck C, Gramlich B, et al. Safe liquid scintillators for large scale detectors[J]. Journal of Instrumentation, 2022,17(11):P11025.
[7] 刘路峰. EJ309液体闪烁体探测器n/γ甄别方法研究[D]. 军事科学院, 2022.
[8] 节帅, 夏文明, 姜荣涛, 等. 三种有机闪烁体探测器n-γ甄别性能评测[J]. 舰船电子工程, 2021,41(11):146-149.
JIE Shuai, XIA Wenming,JIANG Rongtao, et al. Performance evaluation of n-γ discrimination of three organic scintillator detectors[J]. Ship Electronic Engineering, 2021,41(11):146-149.
[9] 王君辉, 张保国, 文万信, 等. 新型水等效液体闪烁体的研究[J]. 核技术, 2018,41(10):26-31.
WANG Junhui, ZHANG Baoguo, WEN Wanxin, et al. Study on a new water equivalent liquid scintillator[J]. Nuclear Techniques, 2018,41(10):26-31.
[10] LIN Zhijun, LV Shichao, YANG Zhongmin, et al. Structured scintillators for efficient radiation detection[J]. Advanced Science, 2022,9(2):2102439.
[11] JIE Ren, WANG Peng, GU Aotian, et al. A review of recent improvements in novel liquid scintillator materials[J]. Processes, 2024,12(6):1223.
[12] Koshimizu M. Recent progress of organic scintillators[J]. Japanese Journal of Applied Physics, 2023,62(1):10503.
[13] 郑占龙. 一种新型掺钆液体闪烁体的制备与性能研究[D]. 绵阳:西南科技大学材料科学与工程, 2017.
[14] LI Jiaxin,HOU Huiliang, HUANG Yuefeng, et al. Pulse-shaping method for real-time neutron/gamma discrimination at low sampling rates[J]. Nuclear Science and Techniques, 2023,34(11):51-63.
[15] Frisch M J,Trucks G W, Schlegel H B,et al.Gaussian 16 Users Reference[Z].2017.
[16] LU Tian.Multiwfn software manual version 3.8 (dev)[Z].Beijing,2025.
[17] Theoretical and Computational Biophysics Group,Beckman Institute for Advanced Science and Technology,University of Illinois at Urbana-Champaign.VMD User’s Guide[Z].2016.
[18] PU Wenjing, LI Xiaodong, LI Gongyi, et al. Phenol substituted polymethylsilane: a soluble conducting polymer with low cross-linking density[J]. Polymer bulletin (Berlin, Germany), 2015,72(4):779-790.
[19] PU Wenjing, XI Xuyao, TAO Pengyu, et al. Aryl group grafted polysilane: novel scintillation solute for high efficiency and environment-friendly scintillator[J]. Journal of Radioanalytical and Nuclear Chemistry, 2022,331(8):3295-3301.
[20] 卢天, 陈飞武. 分子轨道成分的计算[J]. 化学学报, 2011,69(20):2393-2406.
LU Tian, CHEN Feiwu. Calculation of molecular orbital composition[J]. Acta Chimica Sinica, 2011,69(20):2393-2406.
[21] Zaitseva N P, Carman M L, Ford M J, et al. ⁶Li-loaded liquid scintillators produced by direct dissolution of compounds in diisopropylnaphthalene (DIPN)[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2023,1054:168389.
[22] 常乐, 刘应都, 杜龙, 等. EJ301液体闪烁体探测器的波形甄别和能量刻度[J]. 核技术, 2015,38(2):44-49.
CHANG Le, LIU Yingdu, DU Long, et al. Pulse shape discrimination and energy calibration of EJ301 liquid scintillation detector[J]. Nuclear Techniques, 2015,38(2):44-49.
[23] CHEN Potuan. Electron-hole analysis for substituent effects in donor-acceptor conjugated polymers[J]. Materials Today Communications, 2024,38:107804.
[24] 张泽青, 李乾利, 张志军, 等. 中子探测用闪烁材料研究进展[J]. 自然杂志, 2022,44(4):301-315.
ZHANG Zeqing, LI Qianli., ZHANG Zhijun, et al. Research progress of scintillation materials for neutron detection[J]. Chinese Journal of Nature, 2022,44(4):301-315.
[25] Casolaro P, Campajola L, De Luca D. The polysiloxane-based scintillator for measurements of fast neutron spectra in nuclear physics experiments[J]. Radiation Measurements, 2022,156:106798.

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

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