Artificial ⁹⁰Sr is one of the most important long-lived radionuclides of global radioactive fallout from the atmosphere after the testing of nuclear weapons and the accident at the Chernobyl Nuclear Power Plant in 1986. In addition to fallout from the atmosphere, secondary radioactive contamination of Crimea was mainly from the Dnieper River and the North Crimean Canal, which occurred until 2014. ⁹⁰Sr was used as the optimal radiotracer for estimating the rate of sedimentation in the Crimean hypersaline lake. Its vertical distribution in the bottom sediments was assessed. In the core of the bottom sediments, the detectable activity of ⁹⁰Sr in layers 0–1.5 cm and 16.7–21.9 cm was absent, and it was determined again in the layer of 15.5 cm, which was associated with atmospheric fallout of the radionuclide after the Chernobyl NPP accident. There were well-isolated peaks of specific activity in layers at a depth of 4.6 and 13.3–14.3 cm. The calculated rate of sedimentation varied within 0.5–1.5 cm year⁻¹: the minimum rate corresponded to the period 1971–2017, and the highest rate corresponded to the period 1954–1971.

中文翻译：

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使用切尔诺贝利事故后人工放射性核素 90Sr 作为放射性示踪剂估算克里米亚高盐湖 Aktashskoye 的沉降速率

人造⁹⁰ Sr 是核武器试验和 1986 年切尔诺贝利核电站事故后全球放射性沉降物中最重要的长寿命放射性核素之一。克里米亚主要来自第聂伯河​​和北克里米亚运河，直到 2014 年才出现^。90 Sr 被用作估计克里米亚高盐湖沉积速率的最佳放射性示踪剂。评估了其在底部沉积物中的垂直分布。在底部沉积物的核心，可检测到⁹⁰Sr在0~1.5 cm和16.7~21.9 cm层不存在，在15.5 cm层再次测定，与切尔诺贝利核电站事故后放射性核素大气沉降有关。在 4.6 和 13.3-14.3 cm 深度的层中存在明显分离的比活性峰。计算出的沉降速率在 0.5–1.5 cm 年^-1范围内变化：最小速率对应于 1971–2017 年期间，最高速率对应于 1954–1971 年期间。