One important matter of environmental radioactivity monitoring is the accuracy and precision of the 90Sr/90Y measurement techniques. When Cherenkov counting is carried out in coloured waters, the reduction in detection efficiency can cause significant errors in the obtained results. Two colour quench correction methods were considered in this study: the conventional SCR (Sample Channels Ratio) technique and the Muonic peak method. The latter indicates the quench level via the position of the muonic peak in the cosmic background spectrum. So far, there have been no reports about the Muonic peak method's implementation in Cherenkov counting of 90Sr/90Y in waters. The performance, limitations, advantages, and drawbacks of two methods have been compared based on the analysis of coloured spiked test samples. The Muonic peak method provided similar accuracy as the SCR method in test samples. The adequacy and effectiveness of both techniques have been confirmed during 90Sr routine monitoring in the event of a nuclear emergency or radioactive leakage from nuclear facilities.

中文翻译：

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核事故后水域 90Sr/90Y 评估的失冷校正方法比较


环境放射性监测的一个重要问题是 90Sr/90Y 测量技术的准确性和精密度。在有色水中进行 Cherenkov 计数时，检测效率的降低会导致获得的结果出现重大误差。本研究考虑了两种颜色猝灭校正方法：传统的 SCR（采样通道比）技术和 Muonic 峰法。后者通过渺子峰在宇宙背景光谱中的位置来表示猝控能级。到目前为止，还没有关于 Muonic 峰方法在水域中 90Sr/90Y 的 Cherenkov 计数中的实现的报道。基于对彩色加标测试样品的分析，比较了两种方法的性能、局限性、优点和缺点。Muonic 峰方法在测试样品中提供的准确度与 SCR 方法相似。在发生核紧急情况或核设施放射性泄漏的 90Sr 例行监测中，这两种技术的充分性和有效性都得到了证实。