Indoor radon measurements were carried out in 30 elementary schools in Tunis, the capital city of Tunisia, during the winter months of December 2008 to early March 2009. Two classrooms, one each from ground floor and first floor were chosen from each school making a total of 60 classrooms. In some of the classrooms, two detectors (open and closed) were used to measure the concentrations of rado...

Because (222)Rn is a progeny of (238)U, the relative abundance of uranium may be used to predict the areas that have the potential for high indoor radon concentration and therefore determine the best areas to conduct future surveys. Geographic Information System (GIS) mapping software was used to construct maps of South Dakota that included levels of uranium concentrations in soil and stream wa...

Simultaneous measurements of the activity concentrations of radon and its progeny, and conductivity of both polarities were made at a height of 1m above the ground at Mysore (12 N, 76 E, 767 m above mean sea level), India. Diurnal and seasonal variations of activities of radon and its progeny show their peak values in the early morning hours throughout the year. Observations show an increase in...

In this paper, measurements of short- and long-lived Radon progeny attached to atmospheric fine aerosols are reported. Hourly 222Rn short-lived decay products (i.e. 214Bi via on-line alpha spectrometry on 214Po) in the atmosphere were carried out Milan (Italy) from 1999 2016; mean concentrations ranged 0.2 38.1 Bq m?3. It is noteworthy that minima occurred springtime although strongest convecti...

In the present work, we used the (CR–LR) difference technique for retrospective radon progeny measurements in 17 dwellings based on implanted 210Po activities in glass objects. A total of 48 glass objects were examined, but only 19 objects gave results which were sufficiently reliable due to the sensitivity of the method. From these 19 data, an increase in the surface 210Po activities in the gl...

The use of induced time-dependent Radon-222 behavior, to determine source rate magnitudes, ventilation rates (air change rates) and other parameters that affect Rn-222 and progeny levels and exposure to building occupants, is investigated. Under the conditions of purging the subject space and measuring the build-up (seepage) back into the space, theoretical, normalized equations show aunique, o...