【英文标准名称】:StandardTestMethodforMeasuringReactionRatesandFast-NeutronFluencesbyRadioactivationofSulfur-32
【原文标准名称】:用放射性硫-32测量快速中子流量密度和反应速率的标准试验方法
【标准号】:ASTME265-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E10.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:测量;中子;核能;核技术;粒子流量密度;放射性;硫;测试
【英文主题词】:activationanalysis;betacounting;fast-neutronfluences;neutronmeasurement;reactionrates;sulfur
【摘要】:RefertoGuidesE720andE844fortheselection,irradiation,andqualitycontrolofneutrondosimeters.RefertoPracticeE261forageneraldiscussionofthedeterminationoffast-neutronfluenceandfluenceratewiththresholddetectors.Theactivationreactionproduces32P,whichdecaysbytheemissionofasinglebetaparticlein100%ofthedecays,andwhichemitsnogammarays.Thehalflifeof32Pis14.262(14)3days(1)4andthemaximumbetaenergyis1710keV(2).Elementalsulfurisreadilyavailableinpureformandanytracecontaminantspresentdonotproducesignificantamountsofradioactivity.Naturalsulfur,however,iscomposedof32S(95.02%(9)),34S(4.21%(8))(1),andtraceamountsofothersulfurisotopes.Thepresenceoftheseotherisotopesleadstoseveralcompetingreactionsthatcaninterferewiththecountingofthe1710-keVbetaparticle.Thisinterferencecanusuallybeeliminatedbytheuseofappropriatetechniques,asdiscussedinSection8.1.1Thistestmethoddescribesproceduresformeasuringreactionratesandfast-neutronfluencesbytheactivationreaction32S(n,p)32P.1.2Thisactivationreactionisusefulformeasuringneutronswithenergiesaboveapproximately3MeV.1.3Withsuitabletechniques,fission-neutronfluencesfromabout5108to1016n/cm2canbemeasured.1.4Detailedproceduresforotherfast-neutrondetectorsaredescribedinPracticeE261.Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:F04
【国际标准分类号】:17_240;27_120_30
【页数】:6P.;A4
【正文语种】: