【摘要】 用1-苯基-3-甲基-4-苯甲酰基-5-吡唑啉酮（PMBP）为萃取剂,²³⁴Th作示踪剂,完成了在硝酸介质中痕量钍溶剂萃取行为的研究。在²³⁴Th萃取效率与酸度、萃取剂浓度、平衡时间等依赖关系的条件实验的基础上,获得了萃取钍的最佳条件。使用改进的PMBP萃取钍的流程,从¹⁸O离子辐照过的铀靶中分离钍,钍样品的γ射线单谱显示绝大部分反应产物和大量铀的去除是满意的。更多还原

【Abstract】 The solvent extraction behavior of trace thorium was studied using 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone（PMBP） as an extractant and ²³⁴Th as tracer. The optimum conditions for extraction of thorium were evaluated from the studyconcerning extraction dependence of thorium on acidity, extractant concentration, period of equilibration. A procedure was pro-posed for the extraction of thorium from nitric acid media with PMBP. The procedure is used to separate thorium from naturaluranium irradiated with 60 MeV/nucleon ¹⁸O ions. The measured γ-ray spectrum of the thorium fraction shows that decontami-nation of impurity elements and uranium is quite satisfactory.更多还原