ABSTRACT An extensive study was conducted to determine the activity concentrations of natural and artificial radionuclides 226Ra, 232Th, 40K, and 137Cs in soil samples of each governate of Jordan. A total of 370 samples have been measured using a high-purity germanium detector. The activity concentration for 226Ra, 232Th, 40K, and 137Cs has mean values of 42 ± 3, 23 ± 3, 309 ± 21, and 3.7 ± 0.9 Bq kg–1, respectively. The highest mean activity concentration for 226Ra was found to be 138 ± 4 Bq kg–1 in the Alkarak governate. In the Ajloun and Jarash governates, the highest mean activity concentration was 35 ± 3 Bq kg–1 for 232Th, and 14.2 ± 1.9 Bq kg–1 for 137Cs, respectively. Geological influence on the activity concentrations was investigated using the one-way analysis of variance (ANOVA) and independent samples. The ANOVA results indicate that there are strong significant differences between the activity concentrations of 232Th, 40K, and 137Cs based on geological formations the radionuclides occur. The main contribution to gamma dose rate was due to 226Ra activity concentration. Radium equivalent and external hazard index are associated with a mean value of 98 Bq kg–1, and 0.266, respectively.

中文翻译：

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约旦表层土壤放射性核素226Ra、232Th、40K、137Cs活度浓度与地质构造的统计关系

摘要 进行了一项广泛的研究，以确定约旦各省土壤样品中天然和人工放射性核素 226Ra、232Th、40K 和 137Cs 的活性浓度。使用高纯锗检测器测量了总共 370 个样品。226Ra、232Th、40K 和 137Cs 的活性浓度平均值分别为 42 ± 3、23 ± 3、309 ± 21 和 3.7 ± 0.9 Bq kg-1。在阿尔卡拉克省发现 226Ra 的最高平均活性浓度为 138 ± 4 Bq kg-1。在 Ajloun 和 Jarash 省，232Th 的最高平均活动浓度分别为 35 ± 3 Bq kg-1，137Cs 的最高平均活动浓度分别为 14.2 ± 1.9 Bq kg-1。使用单向方差分析 (ANOVA) 和独立样本研究地质对活性浓度的影响。方差分析结果表明，基于放射性核素发生的地质构造，232Th、40K和137Cs的活度浓度之间存在显着差异。对 γ 剂量率的主要贡献是由于 226Ra 活性浓度。镭当量和外部危害指数分别与平均值 98 Bq kg-1 和 0.266 相关。