纳米线阵列结构Lu2SiO5:Ce硬X射线闪烁转换屏研究

项目名称： 纳米线阵列结构Lu2SiO5:Ce硬X射线闪烁转换屏研究

项目编号： No.11475128

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： 顾牡

作者单位： 同济大学

项目金额： 84万元

中文摘要： 随着我国激光惯性约束聚变实验的发展和同步辐射X射线特别是硬X射线成像技术等的发展和应用，除要求用于X射线成像的闪烁转换屏具有高灵敏、快响应的特性外，还要求其具有更高的空间分辨率，具有纳米线阵列结构的闪烁转换屏可引导闪烁光沿纳米线方向传播，从而有效提高转换屏的空间分辨率，这方面的研究国际上才刚起步。LSO:Ce具有高灵敏、快响应、耐辐射等特点，是制备闪烁转换屏的理想材料。本项目拟采用AAO模板辅助的Sol-gel方法，研究和开发一种基于LSO:Ce的兼有高分辨、高灵敏、快响应特性的纳米线阵列结构硬X射线闪烁转换屏，通过LSO:Ce转换屏的结构设计、掺杂改性、样品制备和性能表征等，以期在纳米线阵列结构闪烁转换屏的研制，转换屏空间分辨率、探测灵敏度、发光衰减时间等综合闪烁性能方面取得突破，并为具有高分辨、高灵敏、快响应X射线闪烁转换屏的研究和开发提供一条新的途径，促进我国X射线成像事业的发展。

中文关键词： Lu2SiO5:Ce；纳米线阵列；闪烁转换屏；阳极氧化铝模板；溶胶-凝胶法

英文摘要： With the development of inertial confinement fusion, x-ray especially hard x-ray imaging with synchrotron radiation and so on in our country, the scintillation conversion screen used in x-ray imaging not only is required to have high sensitivity, fast response, but also is required to have a high spatial resolution. When a x-ray conversion screen have nanowire array structure perpendicular to its surface, the scintillation light can be guided to propagate along a direction of nanowire, so that the spatial resolution of the conversion screen can be effectively improved. The research on this aspect is just beginning in the world. LSO:Ce has high light yield, fast decay time and good radiation hardness and is an ideal material for the preparation of scintillation screen. The project intends to develop a LSO:Ce scintillation screen with nanowire array structure which can has a characteristics of high spatial resolution, high sensitivity and fast response and can be used for x-ray imaging when Ex > 10keV by sol-gel AAO template method. It is expected to make a breakthrough in the preparation of the scintillation screen with nanowire array structure and the characteristics of spatial resolution, detection sensitivity and decay time by structure design, doping, sample preparation, characterization, etc.. We look forward to finding a new way to develop x-ray conversion screens with good performance in spatial resolution, detection sensitivity and decay time, thereby facilitating x-ray imaging in our country.

英文关键词： Li2SiO5:Ce;nanowire arrays;scintillation screen;anodic aluminum oxide template;sol-gel method