It is shown that the radiumcontent is not completely relevant to radon exhalation rate from some building material.
结果表明，建筑材料中镭含量与氡析出率之间并不完全相关。
2
The only input factors of the simplified model were soil radiumcontent, dry bulk density, water content and soil texture type and the output was soil radon exhalation rate.
模型只需输入土壤样品镭含量、容重、质量含水率和质地名称，就可以输出该样品的氡析出率理论值。
3
Methods Based on soil radon diffusive theory, a model including the influences of soil radiumcontent, emanation coefficient, soil porosity and moisture saturation on radon exhalation was established.