Determination of Radon Concentration in Water Using Liquid Scintillation Counter
Determination of Radon Concentration in Water Using Liquid Scintillation Counter
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液体闪烁计数器测定水中氡浓度
DOI：
10.3769/radioisotopes.53.123
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
M. Shinogi
中科院分区：
文献类型：
--
作者：
Y. Yasuoka;T. Ishii;Y. Kataoka;T. Kubo;H. Suda;S. Tokonami;T. Ishikawa;M. Shinogi
实验证明，在用液体闪烁计数法测量水中氡时，直接法比萃取法更可取，因为前者技术简单。在计数时间为60分钟时，萃取法和直接法可检测到的最低氡气浓度分别为0.03 Bq/kg和1 Bq/kg。直接法测得的最低可测氡浓度为1Bq/kg，足以将饮用水中的氡浓度检查到美国《环境法》规定的最高污染水平（11.1Bq/L）以下。S.环境保护署。总净计数率采用零水平外推法估算。3个有效示踪点的最佳窗口值分别为50 keV - ∞、75 keV - ∞和100 keV - ∞。效率跟踪方法已被证明是有用的LSC，目前在日本。
It has been confirmed that, in the measurement of radon-in-water using liquid scintillation counting, the direct method is preferred to the extraction method, since the former is simple technique. With a counting time of 60 minutes, the minimum detectable radon concentration by the extraction method and the direct method were found to be 0.03 Bq/kg and 1 Bq/kg, respectively. The minimum detectable radon concentration of 1 Bq/kg attained by the direct method is sufficient to check the radon concentration in drinking water below the Maximum Contaminant Level (11.1 Bq/L) proposed by the U. S. Environmental Protection Agency. The total net counting rates were estimated by the zero level extrapolating method. The optimized window values of the 3 efficiency tracing points were 50 keV - ∞, 75 keV - ∞ and 100 keV - ∞. The efficiency tracing method has been proved useful with LSCs that are currently available in Japan.