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首页> 外文期刊>Radiation Protection Dosimetry >ESTIMATION OF ~(222)Rn FLUX FROM GROUND SURFACE BASED ON THE VARIATION ANALYSIS OF ~(222)Rn CONCENTRATION IN A CLOSED CHAMBER
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ESTIMATION OF ~(222)Rn FLUX FROM GROUND SURFACE BASED ON THE VARIATION ANALYSIS OF ~(222)Rn CONCENTRATION IN A CLOSED CHAMBER

机译：基于封闭室中〜（222）Rn浓度变化分析的地表〜（222）Rn通量估算

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摘要

A method for quantification of the ~(222)Rn flux from the ground surface into the atmosphere is described. A chamber made of polymethylmethacrylate (PMMA) was embedded in the soil and ~(222)Rn concentration and various affecting environmental factors were measured every hour. How environmental factors affect the ~(222)Rn concentration was considered and it was found that there were clear relationships between the variations of ~(222)Rn concentration and various environmental factors, especially air pressure. A simple lumped-parameter model approach was developed to obtain the undisturbed ~(222)Rn flux, which is the hypothetical situation without the chamber. The values of the parameter were found by fitting the model to the measured data for air pressure and ~(222)Rn concentration in the chamber. The effective diffusion coefficient obtained by the analysis agreed well with that obtained by the relation reported by Rogers and Nielson. The undisturbed ~(222)Rn flux from the ground surface into the atmosphere was estimated by using the parameter values obtained.
机译：描述了量化从地面到大气的〜（222）Rn通量的方法。将聚甲基丙烯酸甲酯（PMMA）制成的小室埋入土壤中，每小时测量〜（222）Rn浓度和各种影响环境的因素。考虑了环境因素如何影响〜（222）Rn浓度，发现〜（222）Rn浓度的变化与各种环境因素（尤其是气压）之间存在明确的关系。开发了一种简单的集总参数模型方法来获得不受干扰的〜（222）Rn通量，这是没有腔室的假设情况。通过将模型拟合到室内的气压和〜（222）Rn浓度的测量数据中，可以找到参数值。通过分析获得的有效扩散系数与通过Rogers和Nielson报告的关系获得的有效扩散系数非常吻合。通过使用获得的参数值，估算了从地面到大气的〜（222）Rn通量。

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