The production of 222 Rn depends on the activity concentrations of 226 Ra in the earth's crust, in soil, rock and water. Radon concentration levels are strongly affected by atmospheric influences such as rainfall, real humidity, temperature and barometric pressure, rather than by chemical processes, as it is an inert gas. In particular the exhalation of radon is positively correlated with moisture content, temperature and negatively with pressure, so that these factors must be considered in the determination of exhalation rates in environmental measurements. In this study, radon concentrations in soil gas were continuously monitored for nine months in ten minutes periods, using AlphaGUARD system and the fluctuations of radon concentration were compared with the regional meteorologic data, using time graphs.

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Radon is an inert gas produced by the radioactive decay of radium with a half-life of 3.81 days. Radon is the largest source of natural ionizing radiation and every 2.6 km 2 of surface soil, to a depth of 15 cm, contains approximately 1 gram of radium, which releases radon in small amounts to the atmosphere. On a global scale, it is estimated that 91 TBq of radon are released from soil annually. In this work, the radon concentration in soil gas, which is transported from soil (1 m depth), is measured at five points in Pamukkale and its neighbourhood.

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