Distribution of ^(236)U in Japan Sea : Feasibility of ^(236)U as a tracer of water masses in ocean

我们发现地表环境已经受到U-236的全球性放射性沉降物污染。通过对自然环境表层土壤中U-236、Pu-239、240和Cs-137的测量，分析了全球沉降U-236在土壤中的水平和行为。此外，还尝试将全球沉降物U-236与其他人造核素一起应用于“微型海洋”-日本海的水和物质循环。

We found that the surface environment have been already contaminated with U-236 as a globalfallout. The globalfallout U-236 level and behavior in soil was analyzed from measurements of U-236, Pu-239,240 and Cs-137 in natural environment surface soils which are solely influenced by globalfallout. Furthermore, the application of global fallout U-236 together with other artificial nuclide to the water and material circulation in the "miniature ocean", the Japan sea, have been attempted.