Abstract：
Human activities usually have some contamination as effluents from chemical industries and radionuclides from nuclear reactors. For assessing the probable radioactive contamination in vicinity of Tehran Research Reactor, The gross alpha and beta radioactivity concentrations in soil, pine and cedar leaves and some selected fruits (fig, apple, berry and pomegranate) were investigated using an alpha/beta spectrometer during 2021-2022. Also, the concentrations of artificial and natural radionuclides in samples were investigated by the method of gamma spectroscopy. The gross alpha activity concentrations in soil, pine and cedar leaves and some selected fruits samples are from 0.05 to 0.35 Bq/gr and 0.07-0.31 Bq/gr and 0.04-0.18 Bq/gr, respectively. The gross beta activity concentrations in soil, pine and cedar leaves and some selected fruit samples are from 0.73 to 4.25 Bq/gr and 0.21-3.97 Bq/gr and 1.01-2.71 Bq/gr, respectively. Average activities concentration of natural radionuclide 232Th, 238U and 40K in soil, pine and cedar leaves and some selected fruits are 31.89-16.23-582.73 Bq/kg and 1.84-0.99-84.60 Bq/kg and 1.98-1.09-72.08 Bq/kg respectively. From artificial radionuclides, just 137Cs is recognized in soil sample and the range of 137Cs concentration in surface soils was observed to vary in the range 0.85-2.21 (Bq/kg). The result showed that the Tehran Research Reactor activities not have increased the environmental radioactivity and radiation level in the area.
摘要：
人类活动通常会受到一些污染，例如化学工业的流出物和核反应堆的放射性核素。为了评估德黑兰研究堆附近可能的放射性污染，土壤中的总α和β放射性浓度，松树和雪松叶和一些选定的水果(无花果，苹果,浆果和石榴)在2021-2022年期间使用α/β光谱仪进行了调查。此外，用γ光谱法研究了样品中人工和天然放射性核素的浓度。土壤中的总α活性浓度，松树和雪松叶和一些选定的水果样品为0.05至0.35Bq/gr和0.07-0.31Bq/gr和0.04-0.18Bq/gr，分别。土壤中总β活性浓度，松树和雪松叶和一些选定的水果样品为0.73至4.25Bq/gr和0.21-3.97Bq/gr和1.01-2.71Bq/gr，分别。天然放射性核素232Th的平均活性浓度,土壤中的238U和40K，松树和雪松叶以及一些选定的果实分别为31.89-16.23-582.73Bq/kg和1.84-0.99-84.60Bq/kg和1.98-1.09-72.08Bq/kg。来自人造放射性核素，在土壤样品中仅识别出137Cs，并且观察到表层土壤中137Cs浓度的范围在0.85-2.21（Bq/kg）范围内变化。结果表明，德黑兰研究堆活动并未增加该地区的环境放射性和辐射水平。
