Abstract：
This study focused on the determination of natural (238U, 232Th, and 40K) and artificial (137Cs) radionuclide concentrations both in 55 sediment samples collected from various depths in the Bosphorus and 5 soil samples from the coastline of the Bosphorus, Istanbul, using gamma-ray spectrometry with an HPGe detector. The mean activity concentrations of natural 238U, 232Th, and 40K and anthropogenic 137Cs were determined to be 11.41 ± 0.21 Bq kg-1, 6.87 ± 0.16 Bq kg-1, 369.61 ± 3.41 Bq kg-1, and 6.54 ± 0.11 Bq kg-1, respectively, in the sediment samples. The average activity concentrations of 238U, 232Th, 40K, and 137Cs radionuclides in the soil samples were also measured to be 11.65 ± 0.18 Bq kg-1, 9.55 ± 0.15 Bq kg-1, 369.43 ± 3.09 Bq kg-1, and 4.57 ± 0.09 Bq kg-1, respectively. Radiological contour maps based on the activity concentrations of natural and artificial radionuclides in the sediment samples for the Bosphorus, Istanbul, were created. The total annual effective doses due to soil samples were calculated to be 34.58 μSv y-1.
摘要：
本研究重点测定了天然(238U，232Th,和40K）和人工（137Cs）放射性核素浓度均来自博斯普鲁斯海峡不同深度的55个沉积物样品和博斯普鲁斯海峡海岸线的5个土壤样品，伊斯坦布尔,使用带有HPGe探测器的伽马射线光谱法。天然238U的平均活性浓度，232Th,和40K和人为137Cs分别确定为11.41±0.21Bqkg-1，6.87±0.16Bqkg-1，369.61±3.41Bqkg-1和6.54±0.11Bqkg-1，在沉积物样本中。平均活性浓度为238U，232Th,40K,土壤样品中的137Cs放射性核素也分别为11.65±0.18Bqkg-1、9.55±0.15Bqkg-1、369.43±3.09Bqkg-1和4.57±0.09Bqkg-1。根据博斯普鲁斯海峡沉积物样品中天然和人工放射性核素的活度浓度得出的放射性等值线图，伊斯坦布尔,被创造了。土壤样品的年总有效剂量计算为34.58μSvy-1。
