熔岩样品中微量 Am、Cm 的分析  

THE ANALYSIS OF TRACE Am AND Cm IN MOLTEN ROCK SAMPLES

作　　者：赵焕珍[1] 党海军[1] 张海涛[1] 杜光旭[1] 

机构地区：[1]西北核技术研究所

出　　处：《原子能科学技术》1998年第S1期107-112,共6页Atomic Energy Science and Technology

摘　　要：研究了从熔岩样品中提取和纯化Ａｍ、Ｃｍ的方法。实验结果表明：ＤＨＤＥＣＭＰ－Ｋｅｌ－Ｆ反相色层法是从复杂体系中提取锕系和镧系元素的有效方法。用ｐＨ＝３．０的Ｈ５ＤＴＰＡ－乳酸混合溶液，从ＣＬ－Ｐ２０４萃淋树脂柱上可完成超钚和稀土元素的分离。以ｐＨ＝１．０的Ｈ５ＤＴＰＡ－乳酸溶液能快速地从ＣＬ－Ｐ２０４树脂柱上回收到纯净的Ａｍ、Ｃｍ，通过将Ａｍ（Ⅲ）氧化到Ａｍ（Ⅴ）来完成Ａｍ与Ｃｍ的分离。全流程的化学回收率约为８０％，Ａｍ、Ｃｍ互相污染均小于１％，对Ｕ、Ｐｕ、总裂变产物和稀土的去污系数分别为４．０×１０５、３．０×１０５、１．８×１０４、２．０×１０４，α放射性测量的不确定度好于０．５％。 method of extracting from the molten rock samples and purifying the transplutonium elements is presented. It is showed that versephase chromatography on DHDECMPKelF resin is effective to extract the lanthanides and actinides from a complex system. H5DTPAlactate of pH=3 is used for sepatation of transplutoniums from rareearth elements on CLP204 while the same agent of pH=1 can strip Am and Cm from the CLP204 resin. Separation between Am and Cm is carried out by oxidation of Am(Ⅴ). The overall recovery of Am and Cm is about 80 % and the crosscontamination of them is less than 1 %. The decontamination factors of U, Pu, fission products and rare earth elements are 4.0×105, 3.0×105, 1.8×104 and 2.8×104 , respectively.

关 键 词：微量 镅 锔 分离 分析 纯化 

分 类 号：TL276[核科学技术—核燃料循环与材料]