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。
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 onehour separation procedure for^138Cs from fission products is designed and examined, which combined “deflation”, Cs3 Bi2I9 precipitation and Cs4 （Si（W3 O10 ） 4 ） precipitation. The chemical recovery of ^138 Cs is about （74±1）%. The decontamination factors for main γ-emitters are higher than 1 ×10^3 and no contamination is found.
出处
《核化学与放射化学》
EI
CAS
CSCD
北大核心
2005年第3期164-168,共5页
Journal of Nuclear and Radiochemistry
