This paper presents the results of long-term investigations of 137Cs activity concentrations in chicken meat and eggs from northwest Croatia for the period 1987-2018. The research has been done as a part of monitoring program of radioactive contamination in Croatia. The highest activity concentrations in both of these foodstuffs were measured in 1987 and have been decreasing exponentially ever since. The Fukushima-Daiichi accident in 2011 did not cause any increase of 137Cs activity concentrations. The ecological half-life for 137Cs was estimated to be 8.0 and 8.4 years for chicken meat and eggs respectively. The correlation between 137Cs in fallout and chicken meat as well as between 137Cs in fallout and eggs is very good, the respective correlation coefficients being 0.79 and 0.72, indicating that fallout was the main source of 137Cs contamination in both foodstuffs. The estimated effective doses received by adult members of the Croatian population due to the intake of radiocaesium by chicken meat and egg consumption for the overall observed period are very small, 2.0 and 0.6 µSv respectively. Therefore, chicken meat and chicken egg consumption was not a critical pathway for the transfer of radiocaesium to humans.

中文翻译：

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克罗地亚西北部鸡肉和鸡蛋中137 Cs的长期调查。

本文介绍了1987-2018年间克罗地亚西北部鸡肉和鸡蛋中137Cs活性浓度的长期调查结果。这项研究已经作为克罗地亚放射性污染监测计划的一部分进行。这两种食物中的最高活性浓度是在1987年测得的，此后一直呈指数下降。2011年的福岛第一核电站事故并未导致137Cs活性浓度的任何增加。估计137Cs的生态半衰期对于鸡肉和鸡蛋分别为8.0和8.4年。辐射与鸡肉中的137Cs之间以及辐射与鸡蛋中的137Cs之间的相关性非常好，各自的相关系数分别为0.79和0.72，这表明沉降物是两种食品中137 Cs污染的主要来源。在整个观察期内，由于鸡肉和鸡蛋摄入的放射性铯摄入，克罗地亚人口中成年成员收到的估计有效剂量非常小，分别为2.0和0.6 µSv。因此，鸡肉和鸡蛋的消费不是放射性铯向人类转移的关键途径。