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用二 (2 乙基己基 )磷酸 (HDEHP)作萃取剂 ,二甲苯作稀释剂 ,在盐酸介质中 ,研究了从裂变产物中分离14 2 La的最佳条件 ,提出了“两步延迟分离法”的分离流程。流程所需时间约 1h ,14 2 La的化学回收率约80 % ,对主要γ核素的去污因子大于 1× 10 3 。
The optimum conditions for the separation of 14 2 La from the fission products were studied in hydrochloric acid using di (2-ethylhexyl) phosphoric acid (HDEHP) as the extractant and xylene as the diluent. The two-step delayed separation method "The separation process. The time required for the process is about 1 h, the chemical recovery of 14 2 La is about 80%, and the decontamination factor for the major γ-nuclides is greater than 1 × 10 3.