@article{oai:repo.qst.go.jp:00047161,
 author = {ト, 文庭 and 鄭, 建 and Guo, Qiuju and 青野, 辰雄 and Otosaka, Shigeyoshi and 田上, 恵子 and 内田, 滋夫 and ト 文庭 and 鄭 建 and 青野 辰雄 and 田上 恵子 and 内田 滋夫},
 issue = {2},
 journal = {Journal of Radioanalytical and Nuclear Chemistry},
 month = {Feb},
 note = {The characterization of Pu isotopes in a sediment core collected in the western North Pacific off Fukushima in January 2013 was determined. We compared the results with that of the marine sediments collected from July 2011 to July 2012. Both the 239+240Pu activities and the 240Pu/239Pu atom ratios showed no variation in the marine sediments in the last two years since the FDNPP accident. Pu contamination in the marine sediments in the investigated areas still originated from global fallout and the Pacific Proving Ground close-in fallout.},
 pages = {1151--1154},
 title = {Temporal distribution of plutonium isotopes in marine sediments off Fukushima after the Fukushima Daiichi Nuclear Power Plant accident},
 volume = {303},
 year = {2015}
}