The HMGU thoron experimental house: a new tool for exposure assessment Doses in human organs due to alpha, beta and gamma radiations emitted by thoron progeny in the lung A theoretical study on accurate measurements of thoron with airflow-through scintillation cell method RADIATION PROTECTION DOSIMETRY OCT 2010 141 4 Sp. Iss. SI 448 451 Ishimori, Y Time-integrated monitoring of thoron progeny c...

The annual exposure to indoor radon, thoron and their progeny imparts a major contribution to inhalation doses received by the public. In this study, we report results of time integrated passive measurements of indoor radon, thoron and their progeny concentrations that were carried out in Garhwal Himalaya with the aim of investigating significant health risk to the dwellers in the region. The m...

Radon and thoron isotopes are responsible for approximately half of the average annual effective dose to humans. Although the half-life of thoron is short, it can potentially enter indoor air from adobe walls. Adobe was a traditional construction material in the Great Hungarian Plain. Its major raw materials are the alluvial sediments of the area. Here, seasonal radon and thoron activity concen...

As it is known, the radon (222Rn) gas and its progenies are considered to be the major contributors to human exposure from natural radiation sources [1]. Several surveys seem to have concluded that the radon in the living environment implies an increased health risk [3, 9, 18]. This is the reason why national authorities and international organizations issues guidelines concerning radon levels ...

In the past, the radon isotope Rn (thoron) was often paid little attention in the context of radiation protection at home. Measurements in buildings on the Central-Chinese Loess Plateau have shown, however, that in dwellings built from unfired earthen material, thoron and its progenies can significantly contribute to the inhalation dose of the dwellers. In Germany, such buildings mainly compris...

Radon-222 (also known as radon) is a relatively long-lived isotope of radon and originates from uranium present in the earth's crust. Radon-220 (also known as thoron) is a short-lived isotope of radon and originates from thorium present in the earth's crust. Fundamental properties and health hazards of these gases are compared. On the average, the thoron contribution to the total dose to the lu...

Measurements of thoron (""Rn) have been performed in some 90 buildings during 1992 and 1993, as parts of two different investigations. The measurements were performed in order to form a basis for assessing the risk for high thoron levels indoors in Sweden. In the first study thoron progeny measurements were undertaken in 53 dwellings and 7 workplaces at 13 different locations in south and centr...

Online radon and thoron monitors have been developed using ZnS(Ag) detector for continuous monitoring of concentrations in occupational and general environments. Their performance has been tested successfully both in laboratory and field conditions. Special features of these monitors include low cost, high sensitivity and non-interference of humidity and trace gases. The capability of these rad...

In this study a comparative integrating radon (Rn) and thoron (Rn) survey executed at underground workplaces are discussed. Two types of solid state nuclear track detectors (Radopot and Raduet) were applied for survey at four sites: a manganese mine, a bauxite mine, a tourist cave and a hospital cave. Several numbers of detecting points were chosen at each site and 1-1 Raduet and Radopot detect...

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 radon...