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Poços de Caldas, Brazil

de Azevedo Py D.,Caldas Unit | de Almeida Dantas M.V.,Caldas Unit | Zafalon R.,Caldas Unit
Journal of Radioanalytical and Nuclear Chemistry

An accumulator and a portable electronic monitor were used for determinations of 222Rn flux exhalation from soil to atmosphere. This work describes a method of fitting the function that represents 222Rn concentration variation in the accumulator to experimental data, and tries to answer the practical questions of temperature, leakage and soil disturbance, that may influence 222Rn flux determinations. It is observed a deviation equal to 0.2 %, between the determined counting rate conversion factor of the monitor and the catalog reported factor, showing that the proposed method has a good accuracy. The smallest 222Rn flux that can be determined by this method is equal to 3.24 × 10−3 Bq m−2 s−1. These results encourage the use of this method to measure 222Rn flux from soil to atmosphere in other different places. © 2015, Akadémiai Kiadó, Budapest, Hungary. Source

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