The variation of the alpha radioactivity in the air near the ground and the ground-level total gamma radiation has been monitored in North-eastern Greece over several days. Meteorological information regarding the temperature of the air and humidity has been simultaneously recorded. The alpha-radioactivity shows a periodic diurnal variation with a peak in the morning followed by a decrease in t...

Radon (222Rn) and its decay products are the major sources of natural radiation exposure to general population. The activity concentrations of unattached and attached short-lived 222Rn and thoron (220Rn) progeny in indoor environment of some dwellings of the Jalandhar and Kapurthala districts of Punjab had been calculated using the deposition-based progeny sensors (DRPS/DTPS) and wire-mesh-capp...

According to the annual information packet “Radiation exposure doses population of Russian Federation”, internal radon has been main contributor dose for many years. The paper presents results a comparative assessment and health risks students (pupils) employees four educational institutions in Kingiseppsky district Leningrad region due its progeny. Evaluation was based on instant long-term mea...

Measurement of radon is very important in dwellings because of its radiological impact on public health. Radon contributes more than half of the total ionizing radiation dose. It is known from the recent surveys in many countries that radon is the second cause of lungs cancer after smoking. In this context, we have measured radon ( 222 Rn) concentration in different dwellings of Kathmandu valle...

The transport of Rn through sealed, horizontal 2.54 cm diameter tubes filled with still water was observed to be significantly greater than that predicted solely from molecular diffusion. The rate of Rn transport was also found to be related to the concentration of Rn in the water. A constant source of radon producing an air concentration ranging from 1.1 to 176 Bq cm was connected to one end o...

We performed both a laboratory and a field intercomparison of two novel glass-based retrospective radon detectors previously used in major radon case-control studies performed in Missouri and Iowa. The new detectors estimate retrospective residential radon exposure from the accumulation of a long-lived radon decay product, (210)Pb, in glass. The detectors use track registration material in dire...

In 1956, H.L. Kusnetz proposed a quick method for radon progeny concentration measurement in mine atmosphere using single gross-alpha count of membrane-filtered air. The is still widely used today and based on number impractical assumptions. An instantaneous sampling time (less than ten seconds), one these assumptions that ignores the build-up decay filter paper during period. Of special concer...