title: Investigation of the soil radon variation during the winter months in Sapporo, Japan.
abstract: Soil radon was measured from late October 2000 to January 2001 at three test sites on the campus of Hokkaido University in Sapporo, Japan. Factors affecting radon concentrations were investigated with relation to meteorological data, as well as soil 226Ra content, mineral composition, water content, and pH, Eh and conductivity. Soil radon varied with time and with sampling site appreciably, in a manner unaltered by the surface geology. However, the ratio of radon isotopes (220Rn/222Rn) in the soil was constant within each sampling site, regardless of varying concentration of these nuclides during the monitoring period. Snow covering on the soil surfaces may affect the 222Rn concentration.
authors: Division of Quantum Energy Engineering, Graduate School of Engineering, Hokkaido University, Sapporo, Japan. fuji@qe.eng.hokudai.ac.jp
authors: Ryoko
authors: R
authors: Fujiyoshi
authors: Hiroyuki
authors: H
authors: Morimoto
authors: Sadashi
authors: S
authors: Sawamura
mesh_terms: D004784:Environmental Monitoring; D006863:Hydrogen-Ion Concentration; D007564:Japan; D011886:Radon / Q000032:analysis*; D012621:Seasons; D012990:Soil Pollutants, Radioactive / Q000032:analysis*; D013696:Temperature
chemical_list: D012990:Soil Pollutants, Radioactive; D011886:Radon