Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/10488
Title: Estimation of radioactivity in tobacco
Authors: Nain, Mahabir
Gupta, Monika
Chauhan, R P
Kant, K
Sonkawade, R G
Chakarvarti, S K
Keywords: Track density
Plantation
Tobacco
Fertilizers
Issue Date: Nov-2010
Publisher: NISCAIR-CSIR, India
Abstract: The link between cigarette smoke and cancer has long been established. Smokers are ten times at greater risk of developing lung cancer than that of non-smokers. Tobacco fields and plants also have higher concentration of uranium and consequently large contents of <sup>210</sup> Po and <sup>210</sup> Pb belonging to uranium and radium decay series. These radio-nuclides have long association with tobacco plants. <sup>210</sup>Pb and <sup>210</sup>Po, decay products of the uranium series get dissolved in water and are first transported into plants and subsequently to the human being. Also, the uptake of radio nuclides into roots from the soils and phosphate fertilizers along with direct deposition of <sup>210</sup>Pb by rainfall represents the principal mechanism of incorporation of <sup>210</sup>Pb and <sup>210</sup>Po into the tobacco plants. Uranium present in soil enters the plants through roots and gets distributed in various parts of the tobacco plants. This phenomenon may cause high intake of uranium and its radioactive decay products leading to harmful effects in human being. In the present work, Gamma spectrometry (HPGe detector of high-resolution gamma spectrometry system) has been used at Inter University Accelerator Center (IUAC), New Delhi, for the measurement of activity concentrations of <sup>238</sup>U, <sup>232</sup>Th and <sup>40</sup>K in some tobacco samples. The alpha radioactivity of the leaves of the tobacco plants was measured using plastic track detectors LR-115 Type-II manufactured by Kodak. Measurement of track densities (track cm<sup>-2</sup> day<sup>-1</sup>) shows variation on the upper face and the bottom face of the leaves for the plants. The track density due to alpha particles is higher at bottom face as compared to top face of the leaves
Description: 820-822
URI: http://hdl.handle.net/123456789/10488
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.48(11) [November 2010]

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