Otansev Pelin, Karahan Gürsel, Kam Erol, Barut Ipek, Taskin Halim
Department of Physics, Faculty of Science, Istanbul University, Vezneciler, 34459 Istanbul, Turkey.
Radiat Prot Dosimetry. 2012 Jan;148(2):227-36. doi: 10.1093/rpd/ncr023. Epub 2011 Mar 15.
This study assesses the level of background radiation for Kayseri province of Turkey. Natural radionuclide activity concentrations in soil samples were determined using high-resolution gamma spectroscopy. Outdoor gamma dose measurements in air at 1 m above ground level were determined using a portable gamma scintillation detector. The obtained results of uranium and thorium series as well as potassium ((40)K) are discussed. The present data were compared with the data obtained from different areas in Turkey. From the measured gamma-ray spectra, the average activity concentrations were determined for (238)U (range from 3.91 to 794.25 Bq kg(-1)), (232)Th (range from 0.68 to 245.55 Bq kg(-1)) and (40)K (range from 23.68 to 2718.71 Bq kg(-1)). The average activity concentrations of (238)U, (232)Th and (40)K were found to be 35.51, 37.27 and 429.66 Bq kg(-1), respectively, and 11.53 Bq kg(-1) for the fission product (137)Cs. The highest values of (238)U, (232)Th and (40)K concentrations (794.25 Bq kg(-1), 245.55 Bq kg(-1), 2718.71 Bq kg(-1), respectively) were observed in abnormal samples at Hayriye village. The average outdoor gamma dose rate in air at 1 m above the ground was determined as 114.43 nGy h(-1). Using the data obtained in this study, the average annual effective dose for a person living in Kayseri was found to be about 140.34 µSv.
本研究评估了土耳其开塞利省的天然本底辐射水平。使用高分辨率伽马能谱仪测定了土壤样品中的天然放射性核素活度浓度。使用便携式伽马闪烁探测器测定了地面上方1米处空气中的室外伽马剂量。讨论了铀系、钍系以及钾（⁴⁰K）的测量结果。将当前数据与从土耳其不同地区获得的数据进行了比较。从测量的伽马射线能谱中，确定了²³⁸U（范围为3.91至794.25 Bq kg⁻¹）、²³²Th（范围为0.68至245.55 Bq kg⁻¹）和⁴⁰K（范围为23.68至2718.71 Bq kg⁻¹）的平均活度浓度。发现²³⁸U、²³²Th和⁴⁰K的平均活度浓度分别为35.51、37.27和429.66 Bq kg⁻¹，裂变产物¹³⁷Cs的平均活度浓度为11.53 Bq kg⁻¹。在海吕耶村的异常样品中观察到²³⁸U、²³²Th和⁴⁰K浓度的最高值（分别为794.25 Bq kg⁻¹、245.55 Bq kg⁻¹、2718.71 Bq kg⁻¹）。确定地面上方1米处空气中的平均室外伽马剂量率为114.43 nGy h⁻¹。利用本研究获得的数据，发现生活在开塞利的人的平均年有效剂量约为140.34 µSv。
