欢迎来到天天文库
浏览记录
ID:37416080
大小:33.00 KB
页数:11页
时间:2019-05-23
《核辐射测量方法8(methods of nuclear radiation measurement 8)》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、核辐射测量方法8(Methodsofnuclearradiationmeasurement8)ThisarticlebytheuniqueproductABCcontributionPptdocumentsmayexperiencepoorbrowsingontheWAPside.ItisrecommendedthatyoufirstselectTXT,ordownloadthesourcefiletothelocalview.Theeighthchapterisneutronmeasurement8.1neutronsourceMaincharacteristicso
2、f8.1.1neutronsource1neutronsourcestrengthNeutronsourcestrengthreferstothenumberofneutronsemittedperunittime,i.e.,neutronintensity.Ifonlyoneneutronisreleasedfromeachnuclearreaction,thesourcestrengthisequaltothenumberofnuclearreactionsoccurringinthetargetmaterialperunittime.2sourceenergyNe
3、utronsourceenergyistheneutronenergyemittedbyaneutronsource.NeutronenergyisusuallyreferredtoaskineticenergyBinaryhalflifein2Thehalf-lifeofasourcereferstothehalf-lifeofradioactiveisotopesemittedbybombardingparticles.8.1neutronsourceThetypeof8.1.2neutronsource1isotopeneutronsource1)neutrons
4、ource(alpha,n)neutronsourceRadiumberylliumsourcepoloniumberylliumneutronsourceamericiumberylliumneutronsourceofplutoniumberylliumneutronsourcespontaneousfissionneutronsource(2)~(252Cf)))(spontaneousfissionneutronsource8.1neutronsourceThetypeof8.1.2neutronsource2acceleratorneutronsourceTh
5、eenergyreleasedbytheT(D,n)4Hereactionisassignedtoneutronsandheliumnuclei3acceleratorneutronsourceNeutronsfromthissourcecomefromachainreactioninthereactor.8.1neutronsourceThetypeof8.1.2neutronsourceCommonneutronsourceandclassification8.2basicprinciplesandmethodsofneutrondetection8.2.1nucl
6、earreactionmethodNeutroncrosssectionsofthreenuclearreactionsof10B,6Li,and3He,andneutroncrosssectionsofthreenuclearreactions8.2basicprinciplesandmethodsofneutrondetection8.2.2nuclearrecoilmethodTheincidentenergyofEneutronsandnucleuselasticscattering,neutronmotiondirectionwillbechanged,ene
7、rgyhasbeenreduced,reducedneutronenergytothenucleus,thenuclearmotionatacertainspeed.Thenucleusiscalledarecoilnucleus".Therecoilnucleushasacertaincharge,whichcanberecordedaschargedparticles,andtherecoilnucleuscanberecordedtodetecttheneutron.Thismethodofdetectingneutronsisca
此文档下载收益归作者所有