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  • Author or Editor: Mahmut Doğru x
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Abstract  

The natural radioactivity concentration and some heavy metals in various water and soil samples collected from seismically active area have been determined. Gross-alpha and beta concentrations of different 33 water samples and some heavy metal (Fe, Pb, Cu, K, Mn, Cr and Zn) concentration in 72 soil samples collected from two major fault systems (North and East Anatolian Active Fault Systems) in Turkey have been studied. This survey regarding gross-alpha and beta radioactivity and some heavy metals concentrations was carried out by means of Krieger method using a gross-alpha and beta-counting system and atomic absorption spectrometry (AAS), respectively. Also, gross annual effective dose from the average gross-alpha activity in waters were calculated.

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Abstract  

In this study, 90Sr (540 keVβ ), 129I (150 keVβ ) and the gross beta radioactivity concentrations were determined for the samples of tea as the most leading consumed hot drink in the markets (processed and packaged for sale) in our country. Furthermore, the obtained data were statistically analyzed. For determination of 129I (150 keVβ), 90Sr (540 keVβ) and gross radioactivity concentrations in tea samples, a sensor system consisting of scintillation detector with BP4 probe sensitive to beta radiation and a radiation meter (ST7) configurable for windows at desired power was used.

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Abstract  

In this study, the background radiation level of Elazığ region was determined. Indoor radon measurements were made with CR-39 track detectors and a total of 208 houses were screened. Average radon concentration was 98 Bq/m3 and effective dose value was 2.48 mSv/year. Gamma radiation in air was measured with a plastic scintillator at 214 points. Average indoor and outdoor absorbed dose values were 105.8 and 85.4 nGy/h, respectively. Radioactivity levels of water and soil samples were calculated with gross alpha and gross beta methods. Average gross alpha and gross beta radioactivity concentrations were calculated, respectively, as 0.091 and 0.037 Bq/L for drinking waters and as 289.7 and 143.2 Bq/kg for surface soil.

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Abstract  

The fact that 50% of the natural radiation dose to which humans are exposed is caused by radon gas makes indoor radon measurements important. In this study, levels of indoor radon gas were measured in 204 houses in Kilis, Osmaniye and Antakya using passive nuclear track detectors. Cr-39 radon detectors were left in the living rooms of participants’ houses, then analyzed at the Radon Laboratory of Health Physics Department in Çekmece Nuclear Research and Training Center (ÇANEM) of Atomic Energy Agency of Turkey (TAEK). Average indoor radon activity concentrations for Kilis, Osmaniye and Antakya were 50 Bq/m3 (1.26 mSv/y), 51 Bq/m3 (1.29 mSv/y) and 40 Bq/m3 (1.01 mSv/y), respectively.

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