壤中氡非稳态运移实验模拟  

Experimental simulation for the transportation of radon in soil at volatile phase

作　　者：李业强[1] 葛良全[1] 姜海静[1] 

机构地区：[1]成都理工大学应用核技术与自动化工程学院地学核技术四川省重点实验室,四川成都610059

出　　处：《铀矿地质》2010年第2期114-119,共6页Uranium Geology

基　　金：国家自然科学基金资助项目(编号:40774063)

摘　　要：根据壤中氡非稳态运移模型,通过设计实验,采用自行研制的土壤连续测氡仪,对某地下0.28 m和1.4 m深度处氡浓度进行测量,得到实验数据并拟合图形。研究结果表明,非稳态条件下壤中氡浓度受压强和温度影响随时间呈现周期性变化。氡浓度与压强变化趋势相反,与温度变化趋势一致;温度对氡运移比压强对氡运移的影响大。根据理论值和实测值的拟合情况,平均浓度误差在0.28 m处为-2.01%、在1.4 m处为-8.59%。实验成果表明,理论公式可以用于氡的运移与分布状态的研究。According to transportation model of volatile phase radon in soil,an experiment to continuously measuring radon in soil at the depths 0.28 and 1.4 m was designed and performmed with self developed device.The obtained data were fitted and analysed.It was founded that soil radon concentration in the volatile phase was changed periodically over time and pressure,and the change was opposite to pressure and consistent with temperature.The effect of temperature to radon transport was larger than that of pressure.According to the fitting between theoretical values and measured values,the average relative difference was-2.01% at the depths 0.28 m and-8.59% at the depths 1.4 m.This indicates that the theoretical formula can be used to study the transportation and distribution of radon in soil.

关 键 词：氡及其子体 非稳态 运移模型 拟合 

分 类 号：P619.14[天文地球—矿床学] P631.61[天文地球—地质学]