Uranium isotopes in Hiroshima "black rain" soil

JUN TAKADA, MASAHARU HOSHI, SHOZOH SAWADA, MASANOBU SAKANOUE
1983 Journal of Radiation Research  
Uranium isotopes/Soil/Hiroshima "black rain" Uranium isotopes were studied to clarify the fallout from the Hiroshima atomic bomb. The 234U/238U activity ratios of uranium leached from the soil in the Hiroshima fallout area were significantly higher than those of other areas according to alpha ray spectrometry. The correlation of specific activity of the fission product 137Cs and the 234U/238U activity ratios was studied. Two different correlations were established inside and outside the fallout
more » ... outside the fallout area. The results of this study suggest that manifestations of fallout from the Hiroshima atomic bomb are still detectable in the "black rain" area.
doi:10.1269/jrr.24.229 pmid:6663539 fatcat:bp4bdabi6fa2xpxqo6na4yrh6m