溶液中钚α活度的直接测量研究

Study on Direct Measurement of PlutoniumαActivity in Solution

选取YAP∶Ce闪烁体作为仪器核心部件,建立了接触式测量溶液中微量、痕量钚α活度的分析方法。结果表明：水相钚溶液浓度在5.20×10-5～1.30×10-3 g/L范围内线性良好（R2=0.987 7）,定量检测下限为5.20×10-5 g/L;有机相钚溶液浓度在2.27×10-5～1.13×10-3 g/L范围内线性良好（R2=0.992 3）,定量检测下限为2.27×10-5 g/L。本分析方法有别于传统的α计数法,过程无需制源,操作简单、方便,有望为后处理工艺过程中微量和痕量钚的在线或实验室分析提供一种新的途径。

The ment, and a solution was e YAP Ce scintillator was selected as a core component for the instru- contact-type measurement of micro ,,stablished. The results show that and trace plutonium α activity in under the aqueous phase plutonium solution concentration from 5.20×10-5～1.30×10-3 g/L the concentration ofplutonium and net count rate have fine linearity and the quantitativedetection limit is Under the organic phase plutonium solution concentration from 2.27×10-5 to 1.13×10-3 g/L the net count rate and the concentration of plutonium have fine linearity （R2 =0. 992 3）, and the quantitative detection limit is 2.27×10-5 g/L The method is different from the traditional α-counting method, and has the advantages of simple and convenient operation and without complicated sample preparation process. It is expected to provide a new way for micro and trace plutonium determination online or in laboratory in spent fuel reprocessing.