Abstract : Different samples of water indoor air and soil gas have been collected from Islamabad (33 degrees 3
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Abstract : Different samples of water indoor air and soil gas have been collected from Islamabad (33 degrees 38N 73 degrees 09E altitude of 1760 ft.) the capital of Pakistan and Murree (33 degrees 53N 73 degrees 23E altitude of 7323 ft.) lying on a geological fault line and are analysed for the estimation of mean effective dose through radon concentrations by using RAD-7 a solid state alpha-detector. The variation of radon concentration in water indoor air and soil gas in Islamabad region ranges from 25.90-158.40 kBq m(-3) 43.26-97.04 Bq m(-3) and 17.34-72.52 kBq m(-3) having mean values 88.63 kBq m(-3) 70.67 Bq m(-3) and 45.08 kBq m(-3)() respectively. It ranges from 1.64-10.20 kBq m(-3) 18.48-42.08 Bq m(-3) and 0.61-3.89 kBq m(-3) with mean values 4.38 kBq m(-3) 28.63 Bq m(-3) and 1.70 kBq m(-3)() respectively in Murree and its surroundings. The total mean annual effective doses from water and indoor air of Islamabad and Murree regions are 2.023 and 0.733 mSv a(-1) respectively. These doses are within the recommended limits of the world organisations.
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