Abstract In this study, content of natural radionuclides (226Ra, 232Th and 40K) and radon emanating power and radon mass exhalation rate of surface soil samples collected around industrial province Karabük in which the first iron steel plant was built in 1937 were determined by high-resolution γ-ray spectrometry with a high purity germanium detector. The average activity concentration of 226Ra, 232Th and 40K in soil samples were measured as 30 ± 2, 28 ± 2 and 251 ± 20 Bq kg−1, respectively. The average value of radon emanating power and mass exhalation rate of soil samples were found as 31 % and 19 μBq kg−l s−l, respectively. Assessment of possible radiation hazards to the people due to external exposure was done by estimating the outdoor absorbed gamma dose rate in the air at 1 m above the soil, the corresponding annual effective dose, and the excess lifetime cancer risk. The average outdoor gamma dose rate, annual effective dose, and lifetime cancer risk were estimated as 41 nGy h−1, 51 μSv y−1 and 2.0 × 10−4, respectively. A comparison of the activity and radiological results obtained for the studied samples with the corresponding worldwide average values indicates that the results are below the world average values.

中文翻译：

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土耳其卡拉布克省环境土壤样​​品的天然放射性、氡发射功率和质量呼出率

摘要 在这项研究中，在 1937 年建成第一家钢铁厂的工业省卡拉比克附近采集的表层土壤样品中，天然放射性核素（226Ra、232Th 和 40K）的含量和氡发射功率和氡质量呼出率是通过高通量测定的。使用高纯度锗探测器的分辨率 γ 射线光谱法。土壤样品中 226Ra、232Th 和 40K 的平均活性浓度分别为 30±2、28±2 和 251±20 Bq kg-1。发现土壤样品的氡发射功率和质量呼出率的平均值分别为 31% 和 19 μBq kg-ls-l。通过估算土壤上方 1 m 处空气中的室外吸收伽马剂量率、相应的年有效剂量、以及超额的终生癌症风险。平均室外伽马剂量率、年有效剂量和终生癌症风险估计分别为 41 nGy h-1、51 μSv y-1 和 2.0 × 10-4。将研究样本的活性和放射学结果与相应的世界平均值进行比较，表明结果低于世界平均值。