A study of natural radioactivity levels in environmental samples within the northern coastal region of Egypt and the Eastern Province—Khobar, Dammam, Saudi Arabia, has been evaluated. The samples were analyzed using gamma spectrometry based on HpGe detector. The mean activity concentrations of ²³⁸U, ²³²Th, ²³⁵U, ⁴⁰K in addition to ¹³⁷Cs were 27.03 ± 6.74 Bq/kg, 19.76 ± 0.92 Bq/kg, 0.83 ± 0.06 Bq/kg, 147.11 ± 1.69 Bq/kg and 0.09 ± 0.01 Bq/kg for the first region and 32.9 ± 6.65 Bq/kg, 28.2 ± 0.78 Bq/kg, 1.10 ± 0.3 Bq/kg, 193.8 ± 1.55 Bq/kg and 0.1 ± 0.001 Bq/kg for the second region, respectively. The radiological hazard parameters such as the absorbed dose rate (D), annual effective dose equivalent (AEDE), gamma-ray hazard index (Iγ) and the annual gonadal dose equivalent of the studied samples were estimated. Also, the current work provided the mineralogical composition and the correlations between them and the distribution of radionuclides.

评估了埃及北部沿海地区和东部省份（霍巴，达曼，沙特阿拉伯）内环境样品中自然放射性水平的研究。使用基于HpGe检测器的伽马能谱分析样品。除¹³⁷外，平均活动浓度为²³⁸ U，²³² Th，²³⁵ U，⁴⁰ K第一区域的Cs分别为27.03±6.74 Bq / kg，19.76±0.92 Bq / kg，0.83±0.06 Bq / kg，147.11±1.69 Bq / kg和0.09±0.01 Bq / kg，以及32.9±6.65 Bq / kg，28.2±第二区域分别为0.78 Bq / kg，1.10±0.3 Bq / kg，193.8±1.55 Bq / kg和0.1±0.001 Bq / kg。估算了所研究样品的放射危害参数，例如吸收剂量率（D），年有效剂量当量（AEDE），γ射线危害指数（Iγ）和年性腺剂量当量。另外，当前的工作提供了矿物学组成以及它们与放射性核素分布之间的关系。