First model of the effect of grain size on radon emanation

Akihiro Sakoda, Katsumi Hanamoto, Yuu Ishimori, Takahiro Kataoka, Atsushi Kawabe, Kiyonori Yamaoka

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


The present model represents an improvement on previous models of radon emanation from soil by incorporating soil grain size in addition to moisture. Monte Carlo simulation was employed in the calculation since it was difficult to mathematically express the radon emanation fraction for the present soil model. Grain size is one of the most important factors in describing the properties of soil. Grain size was demonstrated to affect the radon emanation fraction, depending on moisture content. Although the emanation fraction is generally considered to be proportional to grain size, the result of the model calculation suggested that the effect of grain size is not so simple. This study should serve as an initial step toward improving the modeling of this radon emanation.

Original languageEnglish
Pages (from-to)1169-1172
Number of pages4
JournalApplied Radiation and Isotopes
Issue number6
Publication statusPublished - Jun 2010


  • Grain size
  • Modeling
  • Moisture content
  • Pore gap
  • Radon emanation
  • Soil

ASJC Scopus subject areas

  • Radiation


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