Abbasi Akbar, Algethami Merfat, Bawazeer Omemh, Zakaly Hesham M H
Faculty of Engineering, University of Kyrenia, via Mersin 10, Kyrenia, TRNC, Turkey.
Physics Department, Faculty of Science, Taif University, P. O. Box 11099, Taif 21944, Saudi Arabia.
Mar Pollut Bull. 2022 May;178:113593. doi: 10.1016/j.marpolbul.2022.113593. Epub 2022 Mar 28.
The distribution pattern of natural radionuclides (Ra, Th, and K) and anthropogenic radionuclide (Cs) in surface sediment samples from the southwestern coastline of the Caspian Sea were determined to estimate the radiation hazard indices using a high-purity germanium HPGe gamma-ray detector. The activity concentrations of the sediment samples ranged from 22.5 ± 1.0 to 47.4 ± 2.2 Bq kg dry weight (dw) for Ra, 6.5 ± 0.1 to 18.7 ± 0.7 Bq kg dw for Th, 559.9 ± 30.9 to 233.2 ± 19.4 Bq kg dw for K, and 0.9 MDL (minimum detection limit) to 2.7 ± 0.1 Bq kg dw for Cs. Based on the measured values, radiological risk indices were estimated. The mean values for absorbed dose rate, ambient dose equivalent rate, and excess lifetime cancer risk, were calculated as 35.7 nGy h, 47.9 nSv h, and 0.2, respectively.
利用高纯锗（HPGe）γ射线探测器测定了里海西南海岸线表层沉积物样品中天然放射性核素（镭、钍和钾）和人为放射性核素（铯）的分布模式，以估算辐射危害指数。沉积物样品中镭的活度浓度范围为22.5±1.0至47.4±2.2贝克勒尔每千克干重（Bq/kg dw），钍为6.5±0.1至18.7±0.7 Bq/kg dw，钾为559.9±30.9至233.2±19.4 Bq/kg dw，铯为0.9检测限（MDL，最低检测限）至2.7±0.1 Bq/kg dw。根据测量值估算了放射风险指数。吸收剂量率、环境剂量当量率和终生超额癌症风险的平均值分别计算为35.7纳戈瑞每小时（nGy/h）、47.9纳希沃特每小时（nSv/h）和0.2。
