Radon, a progeny of 238U is formed from the radioactive decay of radium. One of the main sources of radon is the emanation from ground water. Radon gas dissolves in groundwater when it moves from the bed of volcanic rocks which contain radioactive elements such as uranium and thorium and then diffuse into spaces. In closed places, the accumulated radon that decays to radioactive particles can c...

Due to the increasing of closed ventilation systems used in buildings, the risk of indoor radon is increased day by day. In this study, we selected two sample rooms to calculate the radon emission coefficient from different levels, radon concentration measured when the natural ventilation was completely closed and compared with the analytical results. The results clearly show the difference in ...

Radon concentration was measured in some dwellings in Kashan city. List of buildings was chosen randomly including old buildings made up of mud brick & clay and new buildings constructed with bricks and cement. Population weighted Radon concentration survey was followed and measurements were carried out using polycarbonate (lexan) track detector at the levels of basement to second floor of the ...

Background and Objectives: Entrance of high concentration of Radon gas through drinking water or inhaling Radon gas released into the air from water can cause lung cancer. This study aimed to measure Radon gas dissolved in groundwater and to determine the annual effective absorbed dose of Radon gas in Zarand city. Materials and Methods: This descriptive study was done on 48 randomly selected r...

Radon and Thoron are the radioisotopes which radiate high alpha energy particles. These two gases can enter in the body by different ways such as inhalation, eating and drinking and then destroy body`s internal tissues and cause the lung cancer. The condensation of these gases differs in various areas and is more in zones near active faults. In this research, first the relation of Radon and Tho...