Browsing by Author "Erees F.S."

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    Measurements of radon content in soil gas and in the thermal waters in Western Turkey
    (2006) Erees F.S.; Yener G.; Salk M.; Özbal Ö.
    Radon is a radioactive gas which makes the primary contribution to the natural radiation to which people are exposed. For that reason, great importance is attributed to the determination of radon concentration levels in water, indoor air, soil gas and outdoors. In the present work radon content measurements in soil gas, as well as γ dose rate surveys of the surface area were realized at 112 stations in Western Turkey. The scintillation detector of EDA Instrument Inc. was used for the radon measurements in soil gas. The radon concentration in 40 thermal water samples in same region was also studied. Radon concentration was measured by the collector chamber method. Radon distribution was found to be related with the tectonic lines and high heat flow zones in the region. © 2005 Elsevier Ltd. All rights reserved.
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    Radon concentrations in thermal waters related to seismic events along faults in the Denizli Basin, Western Turkey
    (2007) Erees F.S.; Aytas S.; Sac M.M.; Yener G.; Salk M.
    The aim of this study is to investigate the relationship between the earthquakes and radon concentrations in thermal waters along faults in the Denizli Basin, an area in Turkey known for its high seismic activity and thermal waters. This area was chosen because it exhibits active crustal movements combined with seismicity and there are numerous outflow thermal waters and gas outputs. In addition, this region has the type of tectonic activity where graben groups and faults take place. Measurements of radon levels and of some chemical and physical characteristics of thermal waters were made at seven sampling stations in the region. Radon concentrations were measured by a ZnS(Ag) scintillation counter in a collector chamber. The activity levels varied between 0.67 and 25.90 kBq m- 3 during the period of May-December 2000. In the evaluation of the results, the seismic data reported by Bogaziçi University Kandilli Observatory and Earthquake Research Institute, Seismological Laboratory were used. The increases observed in radon concentration at two stations were probably related to the earthquakes that took place in the region during the study period. © 2006 Elsevier Ltd. All rights reserved.
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    Radon exhalation rate from building materials using cr-39 nuclear track detector
    (2013) Topcu N.; Bicak D.; Cam S.; Erees F.S.
    Humans are exposed to radiological hazards from natural radiation sources that exist mainly in the earth's crust. Radon is a noble gas and is formed by the decay of 226Ra, which is one of the nuclides formed in the disintegration series from 238U. Building materials are considered as one of the major sources of radon in the indoor environment. Radon is one of the indoor sources that cause radiological health risk. To study radon exhalation rate, samples of sand, gravel, stone, cement, granite, marble, ashlar, ceramic tile and bricks were collected from Manisa and Izmir provinces of Turkey. The radon exhalation rates (in terms of mass and surface area) for these materials were also calculated by using solid-state nuclear track detector (CR-39). The mass and surface exhalation rates are calculated by following the radon activity growth as a function of time. These values were also compared with literature values. © The Author(s), 2013.