Recently, some commercially available active-type radon–thoron monitors were developed; however, their performance has not been characterized. This article presents the characteristics of three (RAD7, Radon Mapper, and AlphaGUARD) at different sampling flow rates. The thoron concentration measured by was compared with reference value a grab method. As result, ratio to increased rate for RAD7 Ma...

Radon is a gas with symbol Rn and atomic number 86. It’s an active, colorless, odorless, tasteless gas formed from decaying of uranium. It is one of the densest gas, and also a health hazard due to its radioactivity. Uranium is the parent compound from which radon is formed. Uranium has been there since the earth was formed. Thus it will be present for millions of years in the same concentratio...

Solid-state nuclear track detectors (SSNTDs) in diffusion chambers have been routinely used for long-term measurements of radon gas concentrations. In usual practice, a filter is added across the top of the diffusion chamber to stop the progeny from entering. Thoron can also be deterred from entering the diffusion chamber by using a polyethylene (PE) membrane. However, the thickness of the PE m...

The present paper deals with the study of the multiple linear regression model for the estimation and prediction of the time series of radon and thoron progeny concentrations in atmosphere. The general purpose of multiple linear regression model is to find the linear relationship between a dependent (or explained) variable and several independent (or predictor) variables. Radon and thoron proge...

The paper presents results of radon (Rn) and thoron (Rn) levels in different parts of some selected plants used in Moroccan cooking and traditional medicine. Plant uptake of radionuclide is one of many vectors for introduction of contaminants into the human food chain. Thus, it is critical to understand the soil–plant relationships that control nuclide bioavailability. The radon and thoron conc...

Background: The current study reports measurements of activity concentrations radon (<sup>222</sup>Rn) and thoron (<sup>220</sup>Rn) in dwellings, followed by inhalation dose assessment the public, then development regulation national action plan (NRAP) Cameroon.Materials Methods: Radon, thoron, progeny were carried out from 2014 to 2017 using radon-thoron discriminative...

This study presents the seasonal variation of indoor radon/thoron and their progeny concentrations measured in 50 dwellings Gurugram district Haryana state, India. Single-entry pinhole dosimeters were used for measurement radon thoron concentration, attached unattached progenies these gases, direct sensor with without wire-mesh employed. The absorbed inhalation dose to people area was calculate...

background: radon and its daughters are amongst the most important sources of natural exposure in the world. soil is one of the significant sources of radon/thoron due to both radium and thorium so that the emanated thoron from it may cause increased uncertainties in radon measurements. recently, a diffusion chamber has been designed and optimized for passive discriminative measurements of rado...