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由于裂片元素钯、银、镉、锡处在239Pu裂变的质量分布曲线的谷区,用直接γ能谱法测量存在诸多干扰,难以准确测量。所以需要用放化法测定钯、银、镉、锡的产额。而用放化法时,通常希望从一个靶中同时获取尽可能多的裂片元素来,这就要求对钚和钯、银、镉、锡进行系统分离。根据钚、钯、银、镉、锡的化学性质,如银易于形成氯化银沉淀,锡在硝酸介质易水解成锡酸,钚在2 mol/L盐酸介质下在阴离子树脂上不吸附等性质,选择采用沉淀法结合离子交换法系统分离钯、
Since the elemental palladium, silver, cadmium and tin are in the valleys of the 239Pu fission mass distribution curve, there are many interferences measured by direct γ-ray spectrometry and it is difficult to measure accurately. Therefore, the need to use radiochemical determination of palladium, silver, cadmium, tin output. In the case of radiochemical methods, it is usually desirable to simultaneously obtain as many slips as possible from a target, which requires the systematic separation of plutonium from palladium, silver, cadmium and tin. According to the chemical properties of plutonium, palladium, silver, cadmium and tin, such as silver is easy to form silver chloride precipitation, tin in nitric acid medium easily hydrolyzed to stannic acid, plutonium in 2 mol / L hydrochloric acid medium on the anionic resin adsorption properties , Choose the precipitation method combined with ion exchange system separation of palladium,