由于其高灵敏度和再现性,活化分析是测定用于生产放射性同位素的高纯稀土氧化物靶材料中痕量杂质的最有希望的方法。在这种情况下,在中子辐照后通常要进行化学分离。当用离子交换法进行分离时,原子序数比靶材料低1的杂质元素的定量分析则由于靶材料的拖尾而受到干扰。 为了避免这一干扰,作者提出:在含有辐照过的靶材料的溶液中先加入与靶材料量 Due to its high sensitivity and reproducibility, activation assays are the most promising method for determining trace impurities in high purity rare earth oxide target materials used for the production of radioisotopes. In this case, chemical separation is usually performed after neutron irradiation. Quantitative analysis of impurity elements lower in atomic number than the target material is disturbed by the tailing of the target material when the ion exchange method is used for the separation. In order to avoid this interference, the authors propose that a solution containing the irradiated target material first be added to the target material