简介：Broadband（1.6–18THz）terahertztime-domainspectroscopy（THz-TDS）andtime-resolvedterahertzspectroscopy（TRTS）wereperformedona54μmthickchalcogenideglass(As30Se30Te40)samplewithatwo-colorlaser-inducedairplasmaTHzsystemintransmissionandreflectionmodes,respectively.Twoabsorptionbandsat2–3and5–8THzwereobserved.TRTSrevealsanultrafastrelaxationprocessofthephotoinducedcarrierresponse,welldescribedbyarateequationmodelwithafiniteconcentrationofmid-bandgaptrapstatesforself-trappedexcitons.ThephotoinducedconductivitycanbewelldescribedbytheDrude–Smithconductivitymodelwithacarrierscatteringtimeof12–17fs,andweobservesignificantcarrierlocalizationeffects.Afastrefractiveindexchangewasobserved100fsbeforetheconductivityreacheditsmaximum,with2ordersofmagnitudelargeramplitudethanexpectedfortheopticallyinducedTHzKerreffect,indicatingthatfreecarriersareresponsibleforthetransientindexchange.
简介：TheGroupofEnergyMaterials(GEM)inIMPisengagedintheirradiationresponseofmaterialscandidatetoadvancednuclearenergysystems(GenIV,fusionreactors).Themajorprogressofresearchinourgroupin2016isintheirradiationhardening/embrittlementofoxide-dispersion-strengthened(ODS)ferriticsteelsandVanadiumalloys,andinthemechanismsunderlyingdamageproductioninsiliconcarbide(SiC)fibers.Abriefdescriptionisgivenasfollows.1.EffectoftheoxidenanoparticlesontheirradiationhardeningofODSferriticsteelsTheinfluenceofoxidenanoparticlesontheirradiationresistanceofODSferriticsteelsisacrucialissuefortheupgradeofODSsteels.
简介：Heavyionbeamsaregenerallyrecognizedasoneofpowerfulmutagensinplantbreedingtogeneratenewmutantswithidealorusefulagronomiccharacters[1].12C6+ionbeams(80MeV/u)acceleratedbyHeavyIonResearchFacilityinLanzhou(HIRFL)wereusedtoirradiatewheatsamples,oneofthemajorwheatvarietiesinQinghaiprovince,namedGaoyuan448.Theradiationdosesrangedfrom10to200Gy.Theirradiatedsamples,controls,andanothermajorwheatvarietynamedAbowereplantedinfarmlocatinginLeducountyofQinghaiprovincein2014.
简介：Ｓｔｕｄｙ ｏｎ ＩＭＦ Ｅｍｉｓｓｉｏｎ ｉｎ ３０ ＭｅＶ／ｕ ４０Ａｒ Ｉｎｄｕｃｅｄ ＲｅａｔｔｉｏｎｓＳｔｕｄｙｏｎＩＭＦＥｍｉｓｓｉｏｎｉｎ３０ＭｅＶ／ｕ４０ＡｒＩｎｄｕｃｅｄＲｅａｔｔｉｏｎｓ￥ＺｈｕＹｏｎｇｔａｉ；ＸｕＨｕｓ...
简介：Veryrecently,theBelleandBESIIIexperimentsobservedanewcharmonium-likestateX(3823),whichisagoodcandidatefortheD-wavecharmonium(13D2).BecausetheX(3823)isjustneartheDˉDthreshold,thedecayX(3823)!J=+??canbeagoldenchanneltotestthesignificanceofcoupled-channeleffects.Inthiswork[1],thisdecayisconsideredincludingboththehidden-charmdipionandtheusualquantumchromodynamicsmultipoleexpansion(QCDME)contributions.
简介：Grapheneistwodimensionalmaterialswhichismadeofhoneycombedcarbonatoms.Itattractsextensiveinterestsforitswonderfulcharacteristicsthatmakethegrapheneapotentialcandidateinfieldsofmicroelectronicsproduction,moleculedetection,desalinationandDNAsequencing.Highlychargedion(HCI)hashugepotentialenergyforpeelingoffelectrons.Wheninteractingwithsolidsurface,theHCIdistortedthesolidlatticeviapotentialdepositionandthenthenanostructureswereformedonthesolidsurface.TheHCIwasexpectedasatoolforsurfacemodification.Inthiswork,HOPGandgraphemewereirradiatedwithXeq+andArq+ions.ThetypicalRamanspectraofgrapheneandHOPGirradiatedwithhighlychargedionswereshowninFig.1.TheDpeakappearedat1335cm??1onthespectraofgrapheneirradiatedwithhighlychargedions.TheintensityofDpeakincreasedwithfluence.TheratioofintensityofDpeaktothatofGpeakvariedwithfluenceinFig.2.Theratioroselinearlywiththesquarerootoffluencewhenfluencewaslow.Theratiosaturatedwhentheirradiationfluencewashigh.Thecriticalfluencedependedonthechargestateofion.Thehigherchargestateitwas,thelowercriticalfluenceitwouldbe.
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简介：ＩｓｏｔｏｐｅｓＴｅｍｐｅｒａｔｕｒｅｉｎ４０Ａｒ＋１５８Ｔｂａｎｄ１０８ＡｇＲｅａｃｔｉｏｎｓａｔ３０ＭｅＶ／ｕ￥ＤａｉＧｕａｎｇｘｉ；ＦｕＹａｎｂｉａｏ；ＨｅＺｈｉｙｏｎｇ；ＤｕａｎＬｉｍｉｎ；ＬｉＺｕｙｕａｎｄＺｈａｎｇＢａｏｇ?..
简介：ＦｉｓｓｉｏｎｗｉｔｈＣｏｍｐａｎｉｏｎｏｆＰａｒｔｉｃｌｅｓＥｍｉｓｓｉｏｎｉｎ４０Ａｒ＋１５９ＴｂａｎｄｎａｔＡｇＲｅａｃｔｉｏｎｓａｔ３０ＭｅＶ／ｕ￥ＤａｉＧｕａｎｇｘｉ，ＦｕＹａｎｂｉａｏ，ＨｅＺｈｉｙｏｎｇ；ＤｕａｎＬｉｍｉ?..
简介：ＡｎＥｍｉｓｓｉｏｎｏｆＣｏｍｐｌｅｘＰａｒｔｉｃｌｅｓｉｎＣｏｕｌｏｍｂＩｎｓｔａｂｉｌｉｔｙｉｎＲｅａｃｔｉｏｎｓ３０ＭｅＶ／ｕ４０Ａｒ＋１５９ＴｂａｎｄｎａｔＡｇ￥ＤａｉＧｕａｎｇｘｉ，；ＦｕＹａｎｂｉａｏ；ＨｅＺｈｉｇｏｎｇ；?..
简介：ＣｏｍｐａｒｉｓｏｎｂｅｔｗｅｅｎＴｈｒｅｅｆｏｌｄＦｒａｇｍｅｎｔａｔｉｏｎａｎｄＳｅｑｕｅｎｔｉａｌＦｉｓｓｉｏｎｉｎ４０Ａｒ＋１５９ＴｂＲｅａｃｔｉｏｎｓａｔ３０ＭｅＶ／ｕ￥ＤａｉＧｕａｎｇｘｉ；ＦｕＹａｎｂｉａｏ；ＨｅＺｈｉｙｏｎｇ...
简介：WepresentthetemperaturedependentelectricaltransportmeasurementsofAg/Si（111）-（√3×√3）R30°bytheinsitumicro-four-pointprobemethodintegratedwithscanningtunnelingmicroscopy.Thesurfacestructurecharacterizationsshowhexagonalpatternsatroomtemperature,whichsupportstheinequivalenttriangle（IET）model.Ametal-insulatortransitionoccursat-115K.Thelowtemperaturetransportmeasurementsclearlyrevealthestronglocalizationcharacteristicsoftheinsulatingphase.
简介：HotnucleiwithdifferentN/Zratiowereproducedbyusing~(40)Arbeamon~(112)Snand~(124)Sntarget,respectively.Theenergyspectraandtheemissionprobabilitiesofhydrogenisotopesareanalyzedinthe30MeV/u~940)Ar+~(112,124)Snreactions.PartialemissionprobabilityP_iofacertainspeciesiisdefinedhereby
简介：Electronscatteringfromsphericalpolyatomicmoleculesintheintermediateandhighenergyrangeisstudiedbyemployingthedevelopedsemi-empiricalformulaforelectronscatteringfromsimplediatomicmolecules.ThetotalcrosssectionsofelectronscatteringfromCF4andCC14areobtainedovertheincidentenergyrange30-5000eV.Thequantitativetotalcrosssectionsarecomparedwiththemeasurementsandwiththeothercalculationswhereveravailableincludingtheresultsderivedfromtheadditivityrulemodelandthecorrelatedopticalpotential[Chin.Phys.Left.21(2004)474],andgoodagreementisobtainedovertheincidentenergyrange30-5000eV.Itisshownthatthecalculationsderivedfromthesemi-empiricalformulaaremuchclosertothemeasurementsthanothercalculations.Finally,somequantitativeinformationofthesingleYukawapotentialisalsoobtained.
简介：ThecompressionbehaviourofPd39Ni10Cu30P21bulkmetallicglassisivestigatedatroomtemperatureupto23.5GPausinginsituhighpressureenergydispersivex-raydiffractionwithasynchrotronradiationsource.Pressureinducedstrucuralrelaxationofthebulkmetallicglassisexhibitedwithinthepressurerange.Itisfoundthatbelowabout5GPa,theexistenceofexcessfreevolumecontributestorapidstructuralrelaxation,whichgivesrisetorapidvolumeticchange.Underhigherpressure,furtherrelaxationresultsinstructuralstiffness.
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![Time-resolved terahertz spectroscopy of charge carrier dynamics in the chalcogenide glass As<b style='color:red'>30</b>Se<b style='color:red'>30</b>Te40[Invited]](/image/thesis2 "Time-resolved terahertz spectroscopy of charge carrier dynamics in the chalcogenide glass As<b style='color:red'>30</b>Se<b style='color:red'>30</b>Te40[Invited]")
