辐射输运用泡沫密度测量不确定度分析

低密度泡沫材料是X光辐射输运实验的首选介质，而低能X射线照相法是泡沫密度测量的重要手段。本工作主要研究泡沫密度测量过程中的各种误差来源，按照国际通用方法对各不确定度分量进行合成与扩展，得到了该方法的不确定度评定。结果表明，该方法的横向分辨率优于10μm，密度测量不确定度小于4.7％，已成功用于SGⅡ物理实验中，取得了满意的效果。

Uncertainty Analysis of Foam Density Measuring in Radiation Transport Experiment

Foam material of low density is the preferred medium for X-ray radiation transport experiment, and the low energy X-ray radioscopy is the important technology for foam density measuring. The every error origin in the process of foam density measuring was investigated. According to the international general method, the component uncertainties were combined and expanded respectively to obtain the uncertainty evaluation. The results indicate that, the horizontal resolution is over 10 μm, the measuring uncertainty of density is under 4.7%, at the same time, it has applied in SGⅡ physical experiment successfully, and has acquired satisfactory effect.