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1、核輻射測(cè)量方法8（Radiationmeasurementmethod8）ThisarticleiscontributedbytheindependentABCThePPTdocumentmaynothaveagoodbrowsingexperienceattheWAPend.ItisrecommendedthatyouchooseTXT,ordownloadthesourcefiletothenativeview.Chapterviiimethodofneutronmeasurement8.1neutronsource8.1.1mainch
2、aracteristicsofneutronsource1neutronsourcestrengthNeutronsourcestrengthreferstothenumberofneutronsemittedwithinaunitoftime,theneutronstrength.Ifeachnuclearreactionemitsonlyoneneutron,thesourceintensityisequaltothenumberofnuclearreactionsoccurringinthetargetmaterialperunitti
3、me.2neutronsourceenergyTheneutronsourceenergyistheneutronenergythattheneutronsourcecanemit.Usuallytheneutronenergyisthekineticenergy2neutronsourcehalf-lifeThehalf-lifeofthesourceisthehalf-lifeofradioactiveisotopesemittedbybombardingparticles.8.1neutronsource8.1.2typeofneutr
4、onsource1isotopeneutronsource1)(alpha,n)neutronsourceSpontaneousfissionneutronsource((252Cf))ofthespontaneousfissionneutronsource(8.1neutronsource8.1.2typeofneutronsource2acceleratorneutronsourceTheenergyreleasedbythereactionofT(d,n)4Heisallocatedtotheneutronandheliumnuclei
5、3acceleratorneutronsourceTheneutronofthesourceisderivedfromthechainreactioninsidethereactor.8.1neutronsource8.1.2typeofneutronsourceCommonneutronsourceandclassification8.2neutrondetectionbasicprincipleandmethod8.2.1nuclearreactionmethod10B,6Li,3Hethreenuclearreactionsofthen
6、eutroncrosssection,theneutroncrosssectionofthethreenuclearreactions8.2neutrondetectionbasicprincipleandmethod8.2.2nuclearrecoilmethodIncidentenergyforEneutronandnucleuselasticscatteringoccurs,themovementdirectionoftheneutronwillchange,energydecreased,thedecreaseoftheneutron
7、energytothenucleus,thenucleusatacertainspeed.Thenucleusiscalledtherecoilnucleus.Therecoilnucleushasacertaincharge,whichcanberecordedasachargedparticle,recordingtherecoilnucleusanddetectingtheneutron,whichisknownasthenuclearrecoilmethod.Thebasicprincipleandmethodofneutrondet
8、ection8.2.3fissionmethodNeutronandheavynuclearpowercanbefission,andthefissionmetho
