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Application of a “closed-can” technique for measuring radon exhalation from mine samples of Punjab, Pakistan
Authors:M Tufail  Sikander M Mirza  Arif Mahmood  A A Qureshi  Yasir Arfat  H A Khan
Institution:a Pakistan Institute of Engineering and Applied Sciences, P.O. Nilore, Islamabad 45650, Pakistan;b Department of Physics, University of the Punjab, Lahore, Pakistan;c Radiation Physics Division, PINSTECH, P.O. Nilore, Islamabad, Pakistan;d Department of Physics, Government College, Lahore, Pakistan
Abstract:Using the closed-can technique, radon exhalation rate measurements have been carried out for shale and coal samples collected from various mines located in the Chakwal and Makarwal areas of Pakistan. For the two areas, the measured average values of the exhalation rates from shale are 1.45±0.13 and 0.67±0.25 Bq m−2 h−1 and for coal are 1.0±0.03 and 0.65±0.32 Bq m−2 h−1, respectively. These values are much lower than the measured exhalation rates from alum-shale-based Nordic concrete which has values in the 50–200 Bq m−2 h−1 range. The lower values of the measured exhalation rates from the shale and coal deposits in the Chakwal and Makarwal areas are indicative of their lower uranium contents and mine workers in these areas do not face any abnormal health hazard due to radon since the exhalation rates have been found to be on the low side.
Keywords:Natural radioactivity  Radon exhalation rate  Closed-can technique  Coal  Shale
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