Determination of Outdoor Radon Concentrations at Madenat Al-Elem University College using CR-39 detector

In the present work , radon gas concentration ,effectiveradium contentnbsp and both area (surface ) and mass exhalation rates in soil samples collected from different locations in Madenat Al-Elem have been measured using CR-39 track detectors . Values of the average radon gas concentration were found to vary from (25.370 Bq /m3 ) to ( 40.580 Bq / m3 ) . Radium equivalent content values were found to vary from ( 10.186 Bq / kg ) to ( 16.293 Bq / kg ).Area ( surface ) exhalation rate values were found to vary from ( 0.439 Bq/ m h ) to ( 0.700 Bq/m h) . Mass exhalation rate values were found to vary from ( 0.017Bq/ kg h ) to ( 0.027Bq/kg h). All the results obtained in the present work were found to be less than their corresponding world limits .Thus, the present results have revealed that , radon gas concentration , radium equivalent content and both area and mass exhalation rates in the studied area do not pose risk to human health.nbs