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Determination of Natural Radioactivity from ^{232}Th with Gamma-Ray Spectrometer in Dereköy-Yazır (Southwestern Anatolia)

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Uyanik N., Öncü Z., Uyanik O., Akkurt İ.
Acta Physica Polonica A
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2015
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vol. 128
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issue 2B
B-441-B-442
EN
This study presents new data on the baseline concentrations of Thorium over the Dereköy-Yazır (Ağlasun-Burdur) volcanic area. Portable gamma-ray spectrometer was used for natural thorium mapping. In situ measurements were made in the field, in the area of 7.5 km² at 165 points. Variations in the Th concentration in the surficial environment of the Dereköy-Yazır region appear to be related to bedrock lithology. The measured thorium concentration varies between 0.68-36 ppm, in the studied area. The highest concentration values were obtained from volcanic rocks. The outcropping volcanic rocks in the region are Pliocene alkaline basalts.
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Natural Radioactivity and Radiation Hazards in Coals Extracted in Amasya, Turkey

100%
Boz M., Öner F., Mavi B.
Acta Physica Polonica A
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2015
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vol. 128
|
issue 2B
B-360-B-362
EN
Radioactive nuclei were created at the beginning of the Universe and with a long half-life, are still present in Earth's crust. The radiations due to the radionuclides contribute to natural background radiation. This generally occurs in ground-source materials (stone, soil, rocks, etc.) in different concentrations. The levels of radiation are due to the uranium, thorium and potassium present in the material. In this study, the natural radioactivity concentrations of coals extracted in Suluova have been determined using a NaI(Tl) γ -ray spectrometer system. The radium equivalent activities of the samples were all below the recommended limit values (370 Bqkg¯¹). The value of external hazard indices is less than unity.
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Natural Radioactivity Levels on Surface Water of Nemrut Crater Lake (Bitlis, Turkey)

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Kuluöztürk M., Doğru M.
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EN
Nemrut Crater lake is the world's second largest and largest of Turkey crater lake and its altitude is 2250 m. The aim of this study is to determine radioactivity levels of the lake surface water. In this study water samples were collected from 33 points of the lake surface. The gross alpha and gross beta activity concentrations were determined by using ultra low level α/β counter. The mean gross alpha and beta activity concentrations were found to be 77.69 mBqL¯¹ and 115.36 mBqL¯¹ respectively. Contour maps were produced for gross alpha and beta concentrations of the lake.
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