Karadeniz Özlem, Karakurt Hidayet, Akal Cüneyt
Department of Physics, Faculty of Sciences, Dokuz Eylül University, 35390, Tınaztepe, İzmir, Turkey,
Environ Monit Assess. 2015 Jun;187(6):319. doi: 10.1007/s10661-015-4554-y. Epub 2015 May 5.
Natural radioactivity distribution of (40)K, (238)U, and (232)Th isotopes in forest soils was investigated by using gamma-ray spectrometry. An extensive radioecological study was carried out between 2010 and 2013 in Mount IDA/Kazdagi, located in Edremit region in Turkey. A total of 341 soil samples were collected from the surface and organic horizons (OL, OF+OH, and A) in 118 soil profiles. The distributions of natural radioactivity levels in these horizons and corresponding absorbed dose rates from outdoors terrestrial gamma radiation throughout the region were mapped in detail. Mean (40)K activity values over the combined horizons varied between 43 and 1,008 Bq kg(-1); whereas, mean (226)Ra and (232)Th concentrations over the combined horizons ranged between 5-152 and 6-275 Bq kg(-1), respectively. Our data indicate that the radioactivity values of the study sites were within the universal normal range. The significant variation among the (232)Th, (226)Ra, and (40)K activities and gamma dose rate might be due to the geological variation in the study sites.
利用伽马射线能谱法研究了森林土壤中（40）K、（238）U和（232）Th同位素的天然放射性分布。2010年至2013年期间，在土耳其埃迪尔内地区的伊达山/卡兹达吉进行了一项广泛的放射生态研究。从118个土壤剖面的表层和有机层（OL、OF+OH和A）共采集了341个土壤样本。详细绘制了该地区这些层中天然放射性水平的分布以及户外陆地伽马辐射相应的吸收剂量率。综合层的平均（40）K活度值在43至1008 Bq kg（-1）之间变化；而综合层的平均（226）Ra和（232）Th浓度分别在5 - 152和6 - 275 Bq kg（-1）之间。我们的数据表明，研究地点的放射性值在全球正常范围内。（232）Th、（226）Ra和（40）K活度以及伽马剂量率之间的显著差异可能是由于研究地点的地质差异。
