Influence of soil environmental parameters on thoron exhalation rate

被引：10
|
作者：
Hosoda, M. [1 ]
Tokonami, S. [1 ]
Sorimachi, A. [1 ]
Ishikawa, T. [1 ]
Sahoo, S. K. [1 ]
Furukawa, M. [2 ]
Shiroma, Y. [2 ]
Yasuoka, Y. [3 ]
Janik, M. [1 ]
Kavasi, N. [1 ]
Uchida, S. [1 ]
Shimo, M. [4 ]
机构：
[1] Natl Inst Radiol Sci, Res Ctr Radiat Protect, Inage Ku, Chiba 2638555, Japan
[2] Univ Ryukyus, Dept Phys & Earth Sci, Nishihara, Okinawa 9030213, Japan
[3] Kobe Pharmaceut Univ, Inst Radioisotope Res, Higashinada Ku, Kobe, Hyogo 6588558, Japan
[4] Fujita Hlth Univ, Sch Hlth Sci, Toyoake, Aichi 4701192, Japan
来源：
RADIATION PROTECTION DOSIMETRY | 2010年 / 141卷 / 04期
关键词：
RADON EMANATION; MOISTURE-CONTENT; RN-222;
D O I：
10.1093/rpd/ncq229
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
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.
引用
收藏
页码：420 / 423
页数：4
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