【摘要】 本文通过使用低本底高纯锗γ谱仪对青岛市近岸海域潮间带土中放射性核素的水平进行调查和分析,掌握潮间带土中放射性核素的基线资料,为开展环境辐射水平评价提供科学依据。结果显示:²³⁸U、²³²Th、²²⁶Ra、⁴⁰K和¹³⁷Cs活度浓度分别为17.1-49.3Bq/kg（平均27.0 Bq/kg）、21.3-54.7 Bq/kg（平均34.6 Bq/kg）、6.7-34.5 Bq/kg （平均18.2 Bq/kg）、576.2-1157.4Bq/kg（平均776.3 Bq/kg）和0.1-2.8 Bq/kg（平均0.9 Bq/kg）,²⁴¹Am及⁶⁰Co的探测下限范围值分别为0.23-0.34 Bq/kg、0.85-1.30 Bq/kg;一般地区和重点地区核素水平分布无差异（p>0.05）。表明青岛市近岸海域潮间带土中放射性核素²³⁸U、²³²Th、²²⁶Ra、⁴⁰K及¹³⁷Cs活度浓度处于正常的本底范围,无人工核素污染,一般地区与重点地区放射性核素水平分布无显著性差异。更多还原

【Abstract】 This article investigates and analyzes the levels of radionuclides in the intertidal soils in the coastal waters of Qingdao City by using a low-background high-purity germanium gamma spectrometer. In order to grasp the baseline data of radionuclides in the intertidal zone soil, and provide a scientific basis for the evaluation of environmental radiation levels. The results showed that the activity concentrations of ²³⁸U、²³²Th、²²⁶Ra、⁴⁰K and ¹³⁷Cs were 17.1-49.3 Bq/kg（average 27.0 Bq/kg）, 21.3-54.7 Bq/kg（average 34.6 Bq/kg）, 6.7-34.5 Bq/kg（average 18.2 Bq/kg）, 576.2-1157.4 Bq/kg（average 776.3 Bq/kg） and 0.1-2.8 Bq/kg（average 0.9 Bq/kg）, the lower detection limits of ²⁴¹Am and ⁶⁰Co are 0.23-0.34 Bq, respectively/kg, 0.85-1.30 Bq/kg; there is no difference in the distribution of nuclide levels in general areas and key areas（p>0.05）. It shows that the activity concentrations of ²³⁸U,²³²Th,²²⁶Ra,⁴⁰K and ¹³⁷Cs in the intertidal zone of Qingdao’s coastal waters are within the normal background range, and there is no artificial radionuclide pollution. There is no significant difference in radionuclide levels between general regions and key regions.更多还原