Abstract
Human population is always exposed to ionizing radiations from natural sources present in the earth crust. Hence the analysis of uranium in soil sample has great significance due to health hazards to human beings. For the purpose, some different soil samples collected from some area of Jharkhand have been analysed for trace uranium concentration using the fission track technique. Lexan polycarbonate was used as detector for recording fission tracks. As reactor neutron spectra is associated with both thermal and fast neutron fluxes; correction to the present uranium data due to fast neutron fission of 232Th was also applied. The uranium contents were estimated by comparing the track densities detectors immersed in the sample and the standard uranium solutions, irradiated along with the samples under the same irradiation conditions. The uranium in the soil samples were found to vary from 209 ng/g to 991 ng/g.
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