The integration of the radioactivity spectrometer KATERINA II in a fixed station (buoy) of the POSEIDON network at the North Aegean Sea within the framework of MARRE Project is presented. The acquisition period lasted from 20 November 2019 till 22 February 2020. An intense increment of the activity concentration of radon progenies (up to an order of magnitude) was recorded during rainfall. More specifically, the ²¹⁴Bi activity concentration varied from 0.09 to 0.53 Bq L⁻¹ without rainfall and the ²¹⁴Pb activity concentration varied from 0.14 to 0.81 Bq L⁻¹. The ²¹⁴Bi activity concentration during rainfall ranged from 0.4 to 5.4 Bq L⁻¹ and of ²¹⁴Pb from 0.3 to 5.3 Bq L⁻¹. The minimum detectable activity of the KATERINA II detection system for measuring low level activities of ¹³⁷Cs is optimized applying background subtraction and the full spectrum analysis technique.

中文翻译：

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北爱琴海的放射性监测与海洋观测平台中的原位传感器集成

介绍了放射性光谱仪KATERINA II在MARRE项目框架内在北爱琴海POSEIDON网络的固定站（浮标）中的集成。采集期从2019年11月20日到2020年2月22日。在降雨期间，ra子代的活动浓度急剧增加（达到一个数量级）。更具体地，无降雨时的²¹⁴ Bi活性浓度在0.09至0.53 Bq L ^-1之间变化，而²¹⁴ Pb活性浓度在0.14至0.81 Bq L ^{-1之间变化}。在²¹⁴降雨时的Bi放射性浓度范围从0.4至5.4贝大号^-1和²¹⁴Pb从0.3到5.3 Bq L ^-1。使用背景减除和全光谱分析技术优化了用于测量¹³⁷ Cs低电平活动的KATERINA II检测系统的最低可检测活性。