无机材料学报2026，Vol.41Issue(2)：201-207,7.DOI:10.15541/jim20250163
填充LiF-CaF2:Eu共晶粉体的有机-无机复合闪烁体制备与表征
Organic-Inorganic Composite Scintillators Loaded with LiF-CaF2:Eu Eutectic Powder:Preparation and Characterization
摘要
Abstract
Thermal neutron technology is widely applied in many fields,such as homeland security,nuclear non-proliferation,nuclear energy development,industrial nondestructive testing,and nuclear physics research.However,existing commercially available thermal neutron detection materials currently still face many developmental challenges in terms of detection performance and manufacturing costs.In this study,a series of organic-inorganic composite scintillators sensitive to thermal neutrons was prepared via solid-state reaction by uniformly dispersing 0-20%(in mass)of LiF-CaF2:Eu eutectic powder in organic polystyrene matrixes.X-ray diffraction patterns,scanning electron microscope morphologies,and elemental distributions of the synthesized LiF-CaF2:Eu eutectic powder were analyzed.The radioluminescence and optical transmittance of the prepared composite scintillators were evaluated,and comparisons were made between LiF-CaF2:Eu eutectic powder and LiF-CaF2:Eu mixed powder as inorganic additives.Using cadmium difference method and pulse shape discrimination technologies,the thermal neutron detection performance of composite scintillators loaded with LiF-CaF2:Eu(natural Li abundance)and 6LiF-CaF2:Eu(95%enriched 6Li)eutectic powder was systematically investigated.Compared to composites filled with LiF-CaF2:Eu mixed powder,those filled with LiF-CaF2:Eu eutectic powder exhibited better optical transmittance and higher radioluminescence intensity,which increased with the addition of more eutectic powder.Increasing the abundance of 6Li can effectively improve thermal neutron detection efficiency,and figure of merit for thermal neutron/gamma discrimination in composite scintillators can reach 2.64.As a promising novel scintillator for thermal neutron detection,the composite scintillators loaded with LiF-CaF2:Eu eutectic powder show excellent thermal neutron detection and thermal neutron/gamma discrimination.关键词
复合闪烁体/热中子探测/LiF-CaF2:Eu/共晶/甄别Key words
composite scintillator/thermal neutron detection/LiF-CaF2:Eu/eutectic/discrimination分类
能源科技引用本文复制引用
周琦,李翔,张开辉,王泽亮,邓明雪,贾文宝,王珂,陈俊锋..填充LiF-CaF2:Eu共晶粉体的有机-无机复合闪烁体制备与表征[J].无机材料学报,2026,41(2):201-207,7.基金项目
中国科学院战略性先导科技专项(XDA25030600) （XDA25030600）
国家重点研发计划(2022YFB3503902) （2022YFB3503902）
强脉冲辐射环境模拟与效应国家重点实验室开放课题(SKLIPR1714)Strategic Priority Research Program of Chinese Academy of Sciences(XDA25030600) （SKLIPR1714）
National Key R&D Program of China(2022YFB3503902) （2022YFB3503902）
Opening Program of State Key Lab of Intense Pulsed Radiation Simulation and Effect(SKLIPR1714) （SKLIPR1714）
