透明锂-6基纳米晶/聚合物复合中子闪烁体的可控制备及性能研究

项目名称： 透明锂-6基纳米晶/聚合物复合中子闪烁体的可控制备及性能研究

项目编号： No.11475127

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 黄世明

作者单位： 同济大学

项目金额： 86万元

中文摘要： 为提高塑料闪烁探测器对低能中子的探测灵敏度，中子探测用高性能新型载锂-6塑料闪烁体被广泛关注。但目前该类闪烁体存在锂-6含量较低、透明性差的问题，影响了探测效率。为此，本项目拟开展锂-6基纳米晶/聚合物复合中子闪烁体的研究，通过形貌和尺寸可控的纳米晶生长方法调控，开发纳米晶表面改性修饰技术，研究纳米晶/聚合物复合机理，制备出高含量的透明纳米复合材料。重点探索纳米晶的形貌和尺寸调控以及表面修饰剂对复合闪烁体的闪烁探测性能的影响，阐明能量传递过程和闪烁性能影响的作用机理，为开发具有高性能的锂-6基纳米晶聚合物复合中子闪烁探测器奠定坚实的理论和实验基础。

中文关键词： 闪烁体；塑料闪烁体；闪烁性能；中子能量响应

英文摘要： To enhance the low energy neutron sensitivity of plastic scintillation detectors, a novel 6Li-loaded plastic scintillator for neutron detection has received considerable attention. However, lithium-6 has proven difficult to load into plastic scintillators. 6Li-based nanocrystal/polymer composite scintillators for neutron detection herein will be investigated. The method of the growth of nanocrystals with tunable morphologies and sizes will be established, the technology of the surface modification for nanocrystals will be developed, the mechanism of the nanocrystal/polymer composite will also be studied, and transparent nanocrystal/polymer composite scintillators with high lithium-6 content will be prepared. The mechanism of the influence of the nanocrystal morphology and size and the surfactant on the energy transfer process and scintillation properties will be revealed. This work will provide a solid academic and experimental basis for preparing high-performance 6Li-based nanocrystal/polymer composite scintillators for neutron detection.

英文关键词： Scintillator;Plastic scintillator;Scintillating properties;Neutron energy response