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<p>Traditional open-loop methods frequently overestimate soil radon exhalation rates due to pressure differentials. To address this, this study evaluates the reliability of a closed-loop continuous measurement method using RAD7 detectors at three distinct locations. We compared exhalation rates derived from the non-linear fitting of initial 3&#xa0;h concentration data against those calculated from subsequent long-term monitoring. The results demonstrate a high degree of consistency between initial fitted values and long-term averages. These findings confirm the stability and reliability of the closed-loop method for extended continuous measuring of soil radon exhalation. This approach provides an effective methodology for radon exhalation rate surveillance.</p>

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Method of closed-loop continuous measurement of radon exhalation rate from soil surfaces

  • 期刊论文

  • 发表日期：

    2026年1月29日

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  • Cheng Luo,
  • Zhongkai Fan,
  • Huiying Li,
  • Feng Xiao,
  • Haoyu You,
  • Jia Liu,
  • Yi Liu,
  • Hao You,
  • Hongzhi Yuan,
  • Yanliang Tan

摘要

Traditional open-loop methods frequently overestimate soil radon exhalation rates due to pressure differentials. To address this, this study evaluates the reliability of a closed-loop continuous measurement method using RAD7 detectors at three distinct locations. We compared exhalation rates derived from the non-linear fitting of initial 3 h concentration data against those calculated from subsequent long-term monitoring. The results demonstrate a high degree of consistency between initial fitted values and long-term averages. These findings confirm the stability and reliability of the closed-loop method for extended continuous measuring of soil radon exhalation. This approach provides an effective methodology for radon exhalation rate surveillance.