节点文献
裂变产物中138Cs的分离
Separation of 138Cs From Fission Products
【摘要】 为了获得更精确的138Cs衰变数据,需要制备出放化纯的138Cs样品。以“两步延迟分离法”为基础,将抽气法与碘铋酸铯沉淀、硅钨酸铯沉淀法相结合,建立了从裂变产物中分离放化纯138Cs的分离流程。其化学回收率达(74±1)%,对主要γ核素的去污因子大于103,操作时间在60 min以内。
【Abstract】 A radiochemical pure 138Cs solution must be isolated from fission products,for more precise decay data of short-life nuclide 138Cs are abtained.Based on "twice delay separation method",an one-hour separation procedure for 138Cs from fission products is designed and examined,which combined "deflation",Cs3Bi2I9 precipitation and Cs4(Si(W3O10)4)precipitation.The chemical recovery of 138Cs is about(74±1)%.The decontamination factors for main γ-emitters are higher than 1×103 and no contamination is found.
【关键词】 138Cs;
两步延迟分离法;
抽气;
Cs3Bi2I9;
硅钨酸铯;
【Key words】 138Cs; "twice delay separation method"; deflation; Cs3Bi2I9; Cs4(Si(W3O10)4);
【Key words】 138Cs; "twice delay separation method"; deflation; Cs3Bi2I9; Cs4(Si(W3O10)4);
- 【文献出处】 核化学与放射化学 ,Journal of Nuclear and Radiochemistry , 编辑部邮箱 ,2005年03期
- 【分类号】O615;
- 【被引频次】5
- 【下载频次】89