@article{oai:repo.qst.go.jp:00047835,
 author = {Bu, Wenting and Zheng, Jian and Guo, Qiuju and Uchida, Shigeo and 鄭 建 and 内田 滋夫},
 issue = {2},
 journal = {Journal of Radioanalytical and Nuclear Chemistry},
 month = {Feb},
 note = {Surface soil samples collected in the Jiuquan region in the downwind area of the Chinese nuclear test site (CNTs) in northwestern China were analyzed for Pu isotopes. The 239+240Pu activities ranged from 0.025 to 0.892 mBq g-1, varying significantly with different sampling sites. The Dunhuang city which located in the southwestern part of the Jiuquan region received the heaviest Pu deposition. The 240Pu/239Pu atom ratios were 0.080-0.193 with an average of 0.167, slightly lower than the global fallout value. The results further convinced the influence of the CNTs for the Pu contamination in the Jiuquan region.},
 pages = {999--1005},
 title = {Plutonium concentration and 240Pu/239Pu isotopic ratio in the surface soils from the Jiuquan region in northwestern China},
 volume = {311},
 year = {2017}
}