ESTIMATION OF RADON EMANATION COEFFICIENT FOR REPRESENTATIVE SOILS IN OKINAWA, JAPAN
ESTIMATION OF RADON EMANATION COEFFICIENT FOR REPRESENTATIVE SOILS IN OKINAWA, JAPAN
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DOI：
10.1093/rpd/ncv233
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发表时间：
2015-11-01
影响因子：
1
通讯作者：
Furukawa, M.
中科院分区：
文献类型：
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作者：
Shiroma, Y.;Hosoda, M.;Furukawa, M.
对日本冲绳岛典型土壤的氡（Rn-222）辐射系数进行了经验估算。干燥和潮湿条件下的辐射系数算术平均值分别为0.19和0.29。在冲绳，传统上将土壤分为三种类型，即暗红色土壤、残留土壤和红黄土壤。深红色土壤的系数相对较高。残留土壤和红壤、黄壤的系数相对较低。为了探讨辐射系数的变化因素，还对土壤进行了放射性元素和物理性质的分析。深红色土壤的细粒和Ra-226含量相对高于其他土壤。研究结果表明，氡辐射系数的变化主要受土壤中Ra-226浓度、粒径和含水量的影响。
Radon (Rn-222) emanation coefficients for the representative soils distributed in Okinawa Island, Japan, have been estimated empirically. Arithmetic means of the emanation coefficients for dry and moist conditions were calculated to be 0.19 and 0.29, respectively. In Okinawa, the soils are traditionally classified into three types, namely the dark red soils, the residual regosols and the red and yellow soils. The dark red soils have relatively high coefficients. The residual regosols and the red and yellow soils have relatively low coefficients. To investigate the variable factor of the emanation coefficients, analyses of radioactive elements and physical properties have also been performed on the soils. For the dark red soils, the contents of the fine particle and the Ra-226 are relatively higher than those for the other soils. Based on these results, it is suggested that the variation in the radon emanation coefficient is mainly regulated by the Ra-226 concentration, the particle sizes and the water contents of the soils.