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Naturally occurring radionuclides in water such as, 226Ra and 222Rn, emit gamma radiation through their decaying process which could reach to the human. The water samples were collected from, Kelantan, Perak and Pahang. At each sampling points, in situ measurement was done whereupon test were performed using GPS, LUDLUM rate meter, and HYDROLAB. Marinelli beakers and glass bottles were used to prepare the water samples. The samples were kept for a month to allow equilibrium between 226Ra, and 222Rn and its progenies to reach. The measurement was done using two different methods, and radon activities were ranged from (0.156-1.876 Bq/l).
Date of Conference: 1-3 June 2011