Authors:A. Singh, A. Kumar, P. Jojo, and Rajendra Prasad
Uranium content of soil samples collected from different states of India, namely Uttar Prades, Rajasthan and Kerala has been
estimated. The areas cover the normal background area, high background area and dumpyards of fertilizer factory and thermal
power plant. Plastic sheets were used as a detector for the registration of fission tracks resulting from the (n, f) reaction
on235U present in the sample due to the thermal neutrons from a nuclear reactor. The uranium concentration has been found to vary
from 0.24 to 9.20 μg/g in various soil samples. Higher levels of uranium were found in the vicinity of a coal fired power
plant. The present results may be useful for the radiation hygiene.
Authors:P. Jojo, A. Rawat, Ashavani Kumar, and Rajendra Prasad
Water samples collected from various sources along the south-west coastal region of India have been analyzed for trace uranium concentration. Fission track registration technique with the Dry method has been used for the analysis. Uranium concentration was found to vary from 0.28±0.01 g/l to 2.71±0.41 g/l and was higher in sea water than in well, river and tap water, respectively.
Authors:P. Jojo, A. Kumar, T. Ramachandran, and R. Prasad
Soil samples collected at the Indian Antarctic station Maitree, situated at the Schirmachar Oasis and belonging to the East Antarctic charnockite provinces have been analysed to determine trace uranium concentrations. The fission track technique using Makrofol-KG as the track detector was used for the analyses. Finely powdered samples and pellets were irradiated with thermal neutrons from a nuclear reactor. Uranium concentrations were obtained from the tracks of the detector. Uranium concentrations were found to vary from 0.036 to 0.364 ppm in the samples investigated. The low levels of uranium indicate the absence of human intervention with the lithosphere in this region.
Authors:A. Rawat, P. Jojo, A. Kumar, and R. Prasad
The trace uranium concentrations have been determined in tobacco obtained from different brands of commercially available cigarette, beedi, chewing tobacco and also in pan masala, using fission track registration technique. Consumption of tobacco orally or by smoking may result in the intake of radioactive elements into the human body causing hazardous effects. External detector method was employed for the determination of uranium using Makrofol-KG as the fission track detector. The range of uranium was found to vary between 0.066–0.106 ppm, 0.042–0.079 ppm and 0.043–0.092 ppm, in tobacco from samples of cigarette, beedi and chewing tobacco, respectively, and between 0.073–0.203 ppm in pan masala samples.