高效快中子转换屏的研制及其性能测试  

Manufacture and Test of High Efficiency Fluorescent Converter for Fast Neutron Radiography

作　　者：郭利安[1] 张国辉[1] 邹宇斌[1] 唐国有[1] 郭之虞[1] 胥建国 郭纪美[1] 

机构地区：[1]北京大学物理学院重离子物理研究所,核物理与核技术国家重点实验室,北京100871

出　　处：《原子能科学技术》2009年第3期203-207,共5页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(10575006);科技部中俄资源环境领域重大问题合作研究资助项目(2005CB724804);北京大学核物理与核技术国家重点实验室开放课题

摘　　要：采用国产材料研制了基于移波光纤的快中子照相用转换屏。测试结果表明，新的转换屏与原有的2mm厚转换屏相比，发光强度可提高到原来的6～8倍，样品成像的统计性明显变好，光纤屏的饱和厚度约为25mm，空间分辨率好于2mm。The fluorescent converter used for fast neutron radiography was developed by using the home-made wavelength-shifting fibers （WSF）. As the experiment shows, the luminosity of the WSF converter is 6-8 times as high as that of the converter we used before and the statistics of the imaging is much better. The relationship between the luminosity and the thickness of the WSF converter is also obtained from which the saturation thickness is 25 mm. The smallest defect that can be detected by the converter is about 2 ram,

关 键 词：快中子照相 转换屏 移波光纤 

分 类 号：TL99[核科学技术—核技术及应用]