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...

The radon area exhalation rate and mass of the soil samples collected from five different depths surface with 20 cm intervals a construction site at Kütahya, Turkey was determined by using E-Perm detectors. Accumulator method is used to determine concentration samples. Radon were measured between 34 ± 4.4 Bq.m-3 86 6.8 an average value 48.6 5.1 for days analysis time. calculated 163.7 21.3 413....

An optical radon detection method is presented. Radon decay is directly measured by observing the secondary radiolumines cence light that alpha particles excite in air, and the selectivity of coincident photon detection is further enhanced with online pulse-shape analysis. The sensitivity of a demonstration device was 6.5 cps/Bq/l and the minimum detectable concentration was 12 Bq/m(3) with a 1...

The risk from environmental radon levels is not higher now than in the past, when residential exposures were not considered to be a significant health hazard. The majority of the radon dose is not from radon itself, but from short-lived alpha-emitting radon daughters, most notably 218Po(T1/2 3 min) and 214Po (T1/2 0.164 msec) along with beta particles from 214Bi (T1/2 19.7 min). Radon gas can p...

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...

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...

background: in this study, measurement of indoor radon and its progeny levels was carried out in gas turbine power station in haryana ( india ), where natural gas is used as fuel. for comparison, the results of a study carried out in thermal power plant in haryana are also presented. radon being a ubiquitous air pollutant has global impact and its monitoring in the environment at work places is...

Approximately half of the human exposure to radiation is due to indoor airborne shortlived progeny (decay products) of the radon gas (Rn). To measure the airborne concentrations of radon gas and/or its progeny, Nuclear Track Detectors (NTDs) are usually employed. The NTDs register the alpha particles emitted by radon gas and its progeny in the form of tracks in the NTDs, which will become visib...