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:Y. Sayi, K. Ramakumar, Rajendra Prasad, C. Yadav, P. Shankaran, G. Chhapru, and H. Jain
A hot vacuum extraction technique for the determination of hydrogen in metal and alloy samples has been standardised. After
measuring the total pressure of the evolved gases, individual hydrogen and deuterium intensities are measured using an on-line
quadrupole mass spectrometer. Synthetic mixtures of H2 and D2, in known concentrations, have been analysed by QMS and an analytical expression correlating the measured [D2]/[HD] intensity ratio with the mole fraction of deuterium in the synthetic mixture has been arrived at. The precision and
accuracy in the measurement of hydrogen is about 10% at 50 ppmw level.