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:: Volume 14, Issue 2 (4-2016) ::
Int J Radiat Res 2016, 14(2): 105-111 Back to browse issues page
Variation of radon progeny concentration over a continental location
K. Charan Kumar, T. Rajendra Prasad, T. Narayana Rao, M. Venkataratnam, K. Nagaraja
Bangalore University , kamsalinagaraj@bub.ernet.in
Abstract:   (5639 Views)

Background: The variation of the radon progeny concentration in outdoor environment and meteorological parameters at fine resolution were studied for one year at a continental location, National Atmospheric Research Laboratory, Gadanki, India.  Materials and Methods: The concentrations were measured using Alpha Progeny Meter by collecting air samples at a height of 1 m above the Earth’s surface at a known flow rate. Results: Radon progeny concentration shows temporal variations on diurnal and monthly scales, and is due to mixing in the atmosphere. Peak in the early morning hours and low values during afternoon compared to nighttime are due to differential heat contrast between earth’s surface and its atmosphere. However, the activity during February shows maximum compared to June/July months.  The diurnal variation of radon progeny shows positive correlation with the relative humidity and negative correlation with ambient temperature.  The monthly mean activity of radon progeny for the year 2012 was found to be 4.76 ± 0.73 mWL. Conclusion: The mean concentration of radon progeny in the study region is relatively high compared to the other locations in India and may be due to the rocky terrains and trapping of air-masses near the observation site due to its topography.    

Keywords: Radon progeny, NARL, alpha progeny meter, working level
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Type of Study: Original Research | Subject: Radiation Biology
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Charan Kumar K, Rajendra Prasad T, Narayana Rao T, Venkataratnam M, Nagaraja K. Variation of radon progeny concentration over a continental location. Int J Radiat Res. 2016; 14 (2) :105-111
URL: http://ijrr.com/article-1-1713-en.html

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Volume 14, Issue 2 (4-2016) Back to browse issues page
International Journal of Radiation Research
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