液-液萃取法从钨中分离钽

    • 摘要: 用放射化学方法和γ谱测量技术检验了在HNO3-HF体系中用甲基异丁基酮萃取钽的快速化学分离流程。实验结果表明,该流程在HNO3-HF体系中能快速、有效地从14MeV中子轰击天然钨靶样中分离钽,对W的去污系数在104以上。将上述化学流程用于中能18O离子轰击过的钨靶时,从γ谱图发现,除少数元素未被分离外,核反应产生的大部分元素已被分离

       

      Abstract: SEPARATIONOFTANTALUMFROMTUNGSTENBYLIQUID┐LIQUIDEXTRACTIONLiZongweiZhaoZhizhengYangWeifanMouWantongYangYongfengCaiXicheng(InstituteofModernPhysics,theChineseAcademyofSciences,Lanzhou730000)ABSTRACTArapidradiochemicalseparationprocedureisperformedusingradiochemicalseparationmethodandγ-spectrummeasurementtechnique.Intheprocedure,tantalumproducedby14MeVneutronsbombardmentofnaturaltungstenisextractedbyisobutylmethylketonefromtheHF-HNO3solution.TheexperimentalresultshowsthatthisseparationprocedureisrapidandeficientforseparatingtantalumfromthemixedsolutionofHF-HNO3byisobutylmethylketoneandthedecontaminationfactorsaremorethan104.Atthesametime,theprocedureisalsousedtoseparatetantalumfromtungstentargetsbombardedwithintermediateenergy(18O).Themeasuredγspectrumshowsthattantalumhasbeenseparatedfrommostelementsproducedinthenuclearreactionsexceptforlesselements.KeywordsHeavyionnuclearreactionLiquid-liquidextractionRapidchemicalseparationγspectrumDecontaminationfactor

       

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