^(237)Np与^(233)Pa的分离和测定

SEPARATION AND DETERMINATION METHOD OF ^(237)Np AND ^(233)Pa

采用多孔高硅氧玻璃作吸附柱 ,研究了在 8mol/LHNO3介质中2 37Np与子体2 33Pa的分离和测定。研究结果表明 ,用H2 SO4 解吸2 33Pa ,能使2 37Np与2 33Pa定量分离。2 37Np和2 33Pa的放化回收率分别为 99%～ 10 1%和 99%～ 10 3% ,方法的相对标准偏差分别为 2 %和 3%

The separation and determination method of 233 Pa and 237 Np is studied. 233 Pa is quantitatively adsorbed by Vycor glass column from 8 mol/L HNO 3 solution containing 237 Np 233 Pa. Subsequently, 233 Pa is eluted from the Vycor glass column with concentrated H 2SO 4 solutiion and Np and Pa is completely separated. Then α radioactivity of 237 Np and γ radioactivity of 233 Pa are measured with liquid scintillation counting method and γ energy spectrum method separately. The precision of the method is: 2 % for 237 Np, 3 % for 233 Pa, the recovery of added standard radioactive samples is: 99 %～101 % for 237 Np, 99 %～103 % for 233 Pa.