作　　者： ; ; ; ; (翁森汉）;

机构地区： 中山大学物理科学与工程技术学院物理系

出　　处： 《中山大学学报（自然科学版）》 1995年第4期109-113,共5页

摘　　要： 人工引入核电站排放的关键核素￣（１３１）Ｉ，采用γ能谱和总β计数两种方法确定核素在土壤－蔬菜系统中的转移系数。测得核素不同迁移时间、不同生长期的蔬菜、以及土壤中不同核素浓度等各种情况下的转移系数。给出转移系数的频数分布及变异性。γ能谱法测得的￣（１３１）Ｉ在广东土壤－蔬菜系统中转移系数的观察值范围为１．２８×１０￣（－２）～２．１０×１０￣（－１），几何平均值为５．０５×１０￣（－２），几何标准偏差为１．９６．实验中观察到蔬菜棵株大小、不同气候条件等因素对转移系数的影响。 Soil一vegetable transfer factors for radioiodine were measured by γ spectrom-etry as well as by total β counts method after￣(131)I solution was added to soil surface。The values of transfer factor with various migration periods and concentrations of￣(131)Iin soil and with various growth periods of vegetables are determined.The frequencydistributions and the variability of transfer factors are presented. From experimental da-ta measured with γ spectrometry, it is shown that the range of observed values is 1.28×10￣(-2)～2. 10×10￣(-1) and the geometric mean and geometric standard deviation are 5.05×10￣(-2)and 1. 96 respectively. Furthermore,it is observed that the values of transferfactors vary with the mass of vegetable and the temprerature and relative humidity in various seasons.

关 键 词： 碘放射性核素 转移系数 土壤 蔬菜 核电站

领　　域： [环境科学与工程]