Seasonal variation of indoor radon/thoron and their progeny levels in lesser-Himalayas of Jammu & Kashmir, India
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In this investigation, the passive estimation of radon (Rn222), thoron (Rn220) and their progenies have been measured in the dwellings of Reasi district of Jammu & Kashmir for a period of 1 year. These estimations have been done with the help of latest developed single entry Pin-hole based dosimeters and progeny sensors based on deposition. The annual Equilibrium factors for 222Rn, 220Rn, and their progenies have been calculated separately for each dwellings The average annual effective dose was found to be 0.9 ± 0.2 mSv/y for 222Rn, which is less than prescribed limit of ICRP. The results obtained indicate no vital health hazards because of exposure of Rn222, Rn220 and their progenies.
KeywordsDeposition based sensors Seasonal variation Equilibrium factor Prescribed level House type
Authors are thankful to the Board of Research in Nuclear Science (BRNS) (No. 2013/36/60-BRNS) and Principal, DAV College, Amritsar for providing financial support and necessary facilities to carry out this measurement. We are also thankful to the inhabitants of the study area for their co-operation amid field work.
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