Influence of soil environmental parameters on thoron exhalation rate.
Radiat Prot Dosimetry
; 141(4): 420-3, 2010 Oct.
Article
in En
| MEDLINE
| ID: mdl-20846974
ABSTRACT
Field measurements of thoron exhalation rates have been carried out using a ZnS(Ag) scintillation detector with an accumulation chamber. The influence of soil surface temperature and moisture saturation on the thoron exhalation rate was observed. When the variation of moisture saturation was small, the soil surface temperature appeared to induce a strong effect on the thoron exhalation rate. On the other hand, when the variation of moisture saturation was large, the influence of moisture saturation appeared to be larger than the soil surface temperature. The number of data ranged over 405, and the median was estimated to be 0.79 Bq m(-2) s(-1). Dependence of geology on the thoron exhalation rate from the soil surface was obviously found, and a nationwide distribution map of the thoron exhalation rate from the soil surface was drawn by using these data. It was generally high in the southwest region than in the northeast region.
Full text:
1
Database:
MEDLINE
Main subject:
Radiation Monitoring
/
Radon
/
Radon Daughters
Type of study:
Etiology_studies
/
Risk_factors_studies
Country/Region as subject:
Asia
Language:
En
Year:
2010
Type:
Article