The fi nal product of a post-volcanic activity is the exhalation of a low-temperature (<100°C) deep origin mofette gas, which contains mostly carbon dioxide. Examples of mofettes are the Torjai-Büdös cave in Transylvania, Romania [1] or the CO2 seepage in Mátraderecske, Hungary [2]. The term ‘mofette’ derives from the Latin word ‘mephitis,’ which means smelly exhalation [3]. Along its path to t...

Radon (222Rn) and thoron (220Rn) account for almost two-thirds of the annual average radiation dose received by Irish population. A detailed study natural radioactivity levels radon exhalation rates was carried out in a legislatively designated “high radon” area, as based on existing indoor measurements. Indoor concentrations, airborne radiometric data stream sediment geochemistry were collated...

Abstract. There is a need for validation framework long-range atmospheric transport modelling dedicated to radionuclides. For distances greater than 50 km, the of radionuclide deposition and ambient gamma dose rate evaluation are particularly difficult validate, since it has been mainly only observed after accidents Chernobyl Fukushima. however natural wet phenomenon leading numerous well-obser...

Extensive export quality reserves of granite, dolerite and marbles which are used for interior decorations as wall facing, paving floors, kitchen counter tops, etc., are available in Azad Kashmir. Since these stones contain radium in trace amounts, therefore, its use as a building material may be a potential source of indoor radon. In order to assess health hazards due to the use of these stone...

We examined the Csalóka Spring, which has the highest radon concentration in the Sopron Mountains (West Hungary) (, yearly average of 227 ± 10 Bq L(-1)). The main rock types here are gneiss and micaschist, formed from metamorphism of former granitic and clastic sedimentary rocks respectively. The aim of the study was to find a likely source of the high radon concentration in water. During two p...

Humans are continuously exposed to ionizing radiation from natural sources. The main contributors to natural radiation are high-energy cosmic radiation and radioactive nuclides that originate in the earth’s crust. Rn, a decay product of Ra, originates from the naturally occurring U decay series. Rn, the only gas in the U decay series, is chemically inert, but is radioactive and exposure to it a...

Radon mass and thoron surface exhalation rate of soil samples collected from the surrounding area Harduaganj thermal power plant (HTPP), Aligarh is measured using an active radon/thoron monitor (SMART RnDuo). The radon values range 27±1 to 100±3 mBq kg−1 h−1 with a mean value 63±17 h−1. vary 1.0 ± 0.2 10±1 kBq m−2h-1 5.7 2.2 m−2h-1. are found be higher than worldwide