@article{article_424149, title={ANALYSIS OF NATURAL RADIOACTIVITY LEVELS IN SOIL SAMPLES AND DOSE ASSESSMENT FOR DIGOR DISTRICT, KARS, TURKEY}, journal={Caucasian Journal of Science}, volume={5}, pages={30–39}, year={2018}, author={Bilgici Cengiz (eker), Gülçin and Öztanrıöver, Ebru}, keywords={Soil, natural radioactivity concentration, gamma ray spectrometry, .dose assessment.}, abstract={<p> <font face="Times New Roman" size="3"> </font> </p> <p style="margin:0cm 0cm 10pt;text-align:justify;line-height:150%;"> <span style="line-height:150%;font-family:’Times New Roman’, serif;font-size:12pt;"> <span style="font-size:12px;">The distribution of natural radioactivity in soils
collected from uncultivated areas in Digor districts of Kars was investigated
by using NaI(Tl) gamma-ray spectrometry. The concentration of the natural radio
nuclides </span> <sup> <font size="2"> <span style="font-size:12px;">226 </span> </font> </sup> <span style="font-size:12px;">Ra </span> <sup> <font size="2"> <span style="font-size:12px;">232 </span> </font> </sup> <span style="font-size:12px;">Th, </span> <sup> <font size="2"> <span style="font-size:12px;">40 </span> </font> </sup> <span style="font-size:12px;">K and </span> <sup> <font size="2"> <span style="font-size:12px;">137 </span> </font> </sup> <span style="font-size:12px;">Cs
in the 55 soil samples from the studied areas range from 21.6±7.0 to 55.7±8.2
Bqkg </span> <sup> <font size="2"> <span style="font-size:12px;">-1 </span> </font> </sup> <span style="font-size:12px;">, 45.0±14.7 to 94.7±15.3 </span> <span style="font-size:12px;">  </span> <span style="font-size:12px;">Bqkg </span> <sup> <font size="2"> <span style="font-size:12px;">-1 </span> </font> </sup> <span style="font-size:12px;">, 474.5±0.0 to 666.5±9.2 Bqkg </span> <sup> <font size="2"> <span style="font-size:12px;">-1 </span> </font> </sup> <span style="font-size:12px;">
and BDL to 13.3±1.5 Bqkg </span> <sup> <font size="2"> <span style="font-size:12px;">-1 </span> </font> </sup> <span style="font-size:12px;">, respectively. The determined mean values
of activity concentrations of </span> <sup> <font size="2"> <span style="font-size:12px;">226 </span> </font> </sup> <span style="font-size:12px;">Ra </span> <sup> <font size="2"> <span style="font-size:12px;">232 </span> </font> </sup> <span style="font-size:12px;">Th and </span> <sup> <font size="2"> <span style="font-size:12px;">40 </span> </font> </sup> <span style="font-size:12px;">K
were used to calculate the radiation hazard indices in soil samples </span> </span> <span lang="tr" style="line-height:150%;font-family:’Times New Roman’, serif;font-size:12px;" xml:lang="tr">. </span> <span lang="tr" xml:lang="tr" style="font-size:12px;"> <font face="Calibri" size="3"> </font> </span> <span style="line-height:150%;font-family:’Times New Roman’, serif;font-size:12pt;"> <span style="font-size:12px;">In the studied area, the
radium equivalent activity (Ra </span> <sub> <font size="2"> <span style="font-size:12px;">eq </span> </font> </sub> <span style="font-size:12px;">) varied from 131.3 to 195.1 Bqkg </span> <sup> <font size="2"> <span style="font-size:12px;">-1 </span> </font> </sup> <span style="font-size:12px;">
with the mean value of 171.5 Bqkg </span> <sup> <font size="2"> <span style="font-size:12px;">-1 </span> </font> </sup> <span style="font-size:12px;"> and </span> <span style="font-size:12px;">  </span> <span style="font-size:12px;">the open air absorbed gamma dose rate (ADR)
varied from 61.7 to 88.0 nGyh </span> <sup> <font size="2"> <span style="font-size:12px;">-1 </span> </font> </sup> <span style="font-size:12px;"> with the mean value of 79.0 nGyh </span> <sup> <font size="2"> <span style="font-size:12px;">-1 </span> </font> </sup> <span style="font-size:12px;">.
The annual effective air dose rate (AED) due to the presence of radionuclides
ranged between 75.7 and 107.9 µSv with the average value of 96.8 µSv. The mean
value of risk for cancer formation (LCR) during an average human lifetime was
determined to be 0.34x10 </span> <sup> <font size="2"> <span style="font-size:12px;">-3 </span> </font> </sup> <span style="font-size:12px;">. The results presented in this study,
Turkey has been compared with the average values of similar studies conducted
in different regions of the world. The results of the study may constitute a
reference for future assessments. </span> </span> </p>}, number={1}, publisher={Kafkas University}