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简介：Theneutronfluxmonitor(NFM),asasignificantdiagnosticsystemintheInternationalThermonuclearExperimentalReactor(ITER),willplayanimportantroleinthereadingsofaseriesofkeyparametersinthefusionreactionprocess.AsthecoreofthemainelectronicsystemoftheNFM,theneutron-gammapulseshapediscrimination(n-γPSD)candistinguishtheneutronpulsefromthegammapulseandotherdisturbingpulsesaccordingtothethresholdsoftherisingtimeandtheamplitudepre-installedontheboard,thedoubletimingpointCFDmethodisusedtogettherisingtimeofthepulse.Then-γPSDcanprovideanaccurateneutroncount.

简介：Ｒｉｓｅ　ａｎｄ　Ｄｅｃｌｉｎｅ　ｏｆ　Ｎｅｕｔｒｏｎ　ＨａｌｏＲｉｓｅａｎｄＤｅｃｌｉｎｅｏｆＮｅｕｔｒｏｎＨａｌｏ￥ＷａｎｇＺｈｅｎｇｄａ；ＺｈａｎｇＸｉａｏｄｏｎｇ；ＷａｎｇＸｉａｏｃｈｕｎａｎｄＷａｎｇＸｉａｏｂｉｎＩｎｔｈｅｓｅｌｆ－－ｓｉ...

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简介：ＥｘｐｅｒｉｍｅｎｔａｌＭｅａｓｕｒｅｍｅｎｔｓｏｆＮｅｕｔｒｏｎＹｉｅｌｄｓａｎｄＮｅｕｔｒｏｎＥｍｉｓｓｉｏｎＲａｔｅｓｉｎＩｎｔｅｒｍｅｄｉａｔｅＥｎｅｒｇｙＨｅａｖｙ，ＩｏｎＲｅａｃｔｉｏｎｓ￥ＬｉＧｕｉｓｈｅｎｇ；ＺｈａｎｇＴｉａｎｍｅｉ；...

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简介：Thenumericalresultsofthepopulationsforthebaryonoctetinneutronstarmatterhavebeenpresentedbysolvingasettranscendentalequationsintheframeworkoftherelativisticmeanfieldapproximation.Theinfluenceofthehyperoninteractionsonhyperonpopulationsinneutronstarmatterisdiscussed.Theresultsmanifestthatwhentheratioofthehyperon-to-nucleoncouplingsincreases,allhyperonsappeartowardslowbaryondensitydirection.

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简介：Theβ-decaysofneutron-richcarbon,nitrogenandfluorineisotopeshavebeensys-tematicallystudiedusingtheOXBASHshellModel.Inthepsd,spsdandspsdpfmodelspace,weusetheWBPinteractiontocalculatethehalf-livesandneutronemissionprobabilitiesofneutron-richcarbonandnitrogenisotopes,respectively.WiththeUSD(W)andCWinteractions,wecalculatethehalf-livesandneutronemissionprobabilitiesofneutron-richfluorineisotopeinthesdmodelspace,respectively.Thecalculatedhalf-livesandneutronemissionprobabilitiesrepro-ducerecentexperimentaldataverywell.Itseemstoshowthattheparticlesoftheneutron-richcarbonandnitrogenisotopesaremainlyexcitedinthespsdspace.Theβ-decayof21Ntotheneutronboundstatesin21Oismostlythefirstforbiddentransitionwhichmakestheneutronemissionprobabilityincrease.Thetheoreticalcalculationofβ-decayof25Fto25NewithCWinteractionshowsthatCWinteractionisbetterthanUSDinteraction.

简介：TheeffectsofσandΦmesonsonthesurfaceredshiftofaneutronstarhavebeeninvestigatedwithintheframeworkofrelativisticmeanfieldtheoryforthebaryonoctet{n,p,Λ,Σ,Σ0,Σ+,Ξ,Ξ0}system.ItisfoundthatcomparedwiththosewithoutconsideringthecontributionsofσandΦmesons,thesurfaceredshiftdecreasesandthatcorrespondingtothemaximumvalueofthemassalsodecreasesfrom0.2540to0.2236,aboutby12%.Meanwhile,itisalsofoundthatincludingσandΦmesons,theM/Randthatcorrespondingtothemaximummassdecrease.

简介：ＳｔｕｄｙｏｆＮｅｕｔｒｏｎ－ｒｉｃｈＨｇＩｓｏｔｏｐｅｓ￥ＺｈａｎｇＬｉ；ＺｈａｏＪｉｎｈｕａ；ＷａｎｇＪｉｃｈｅｎｇａｎｄＺｈｅｎｇＪｉｗｅｎＴｈｅｎｅｕｔｒｏｎ－ｒｉｃｈＨｇｉｓｏｔｏｐｅｓ２０５－２０８Ｈｇｗｅｒｅｐｒｏｄｕｃｅｄｉｎ...

简介：Itiswellknownthatvanadiumalloywillfacetostrongneutronirradiationandhydrogenenvironmentsasastructuralmaterialinafusionreactor.Someresearcheshavereportedthatvanadiumalloytookstronglyhardeningafteranexposuretohydrogenenvironmentandirradiationbyneutronatatemperaturelowerthan400℃.Theductilityofthealloywaslostlargely,evenentirelybrittlefractureoccurredsometimesintensionloadingofthealloy.Therefore,it'stogettheknowledgeofthehardeningmechanismandthefracturemechanicalforthepurposetoimprovetheperformancesofthealloyunderthecircumstances.

简介：Inthepresentwork,theself-energyeffectonthesuperfluidityofneutronmatterinthechannel~1SohasbeeninvestigatedinageneralizedBCStheory.Theground-statecorrelationsintheself-energyhavebeentakenintoaccount.TheresultofthecalculatedenergygapisshowninFig.1~[1]inwhich,thesolidlineindicatesthe

简介：ＳｔｒｕｃｔｕｒｅＰｒｏｐｅｒｔｉｅｓｏｆＬｉｇｈｔＮｅｕｔｒｏｎ－ｒｉｃｈＮｕｃｌｅｉ￥ＧｕＪｉｎｎａｎａｎｄＺｈａｎｇＣｈａｎｇｈｕａＩｎｔｉｌｅｆｒａｍｅｗｏｒｋｏｆｌａｒｇｅ－ｂａｓｉｓｓｈｅｌｌｍｏｄｅｌ［１］，ｔｈｅｓｔｒｕｃｔ...

简介：Chinaplanstobuildanexperimentalfastneutronbreedingreactorby2000tolayasolidtechnologicalfoundationfortheconstructionofcommercialfastneutronreactors.Thepreliminarydesignsforthefacilityareexpectedtobecompletedbytheendofthisyear.Thefacility,tobeownedbytheChineseAcademyofNuclearEnergy,willhaveadesignedthermalpowerof65MWandanelectricitygeneratingoutputof20MW.Developmentoffastneutronreactorsis

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简介：ＥＸＰＯＮＥＮＴＩＡＬＳＴＡＢＩＬＩＺＡＴＩＯＮＯＦＴＨＥＳＯＬＵＴＩＯＮＦＯＲＴＩＭＥＤＥＰＥＮＤＥＮＴＮＥＵＴＲＯＮＴＲＡＮＳＰＯＲＴＥＱＵＡＴＩＯＮＬＩＸＵＥＺＨＩ（李学志）；ＺＨＵＧＵＡＮＧＴＩＡＮ（朱广田）（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈ...

简介：Ａ　Ｎｅｗ　Ｎｅｕｔｒｏｎ－ｄｅｆｉｃｉｅｎｔ　Ｉｓｏｔｏｐｅ　２３５ＡｍＡＮｅｗＮｅｕｔｒｏｎ－ｄｅｆｉｃｉｅｎｔＩｓｏｔｏｐｅ２３５Ａｍ￥ＬｉｕＨｏｎｇｙｅ；ＧｕｏＪｕｎｓｈｅｎｇ；ＧａｎＺａｉｇｕｏ；ＹａｎｇＷｅｉｆａｎ；ＳｈｉＬｉｊ...

简介：AnewmethodofNeutronActivationAnalysis(NAA)forsedimentmovementstudyispresentedinthispaper.Throughanalyzingthenaturalsediment,theinformationaboutnaturaltracingagentshasbeenobtained,whichcanshowthedirectionofsedimentmovementandrelativedischargeofsedimenttransportation.Testresultsinsomeareas,suchasShantouHarbourandHangzhouBay,areingoodagreementwiththosefromnormalhydrologicmeasurementsandsomeresultsarenotobtainablewiththelatter.TheNAAiseconomical,practicalandreliable,andshouldbewidelyusedinengineeringpractice.