Isotopic composition of Uranium in soil and ground water samples collected around 30 km Chernobyl Exclusion ZoneS. K. Sahoo, S. Yoshida, S. Tokonami, H. Yonehara, N. Y. Tsygankov and P. V. ZamostyanRadioprotection, 44 5 (2009) 785-790DOI: https://doi.org/10.1051/radiopro/20095141