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377 个结果
  • 简介:ConsideringthatKBe2BO3F2(KBBF)isanoutstandingdeepultravioletcrystalwhichcangeneratetheshortestwavelengthsinsecondharmonicgenerationandsum-frequencygeneration,wereportthedeterminationofthenonlinearopticalcoefficientsoftheKBBFcrystal.Thed11coefficientwasdeterminedtobe0.49pm/VbytheMakerfringesmethodatthewavelength1064nm,whichisinagreementwellwiththetheoreticalvalue.

  • 标签: 非线性光学 KBe2BO3F2晶体 测量
  • 简介:Thefastions,producedinD-3Hefusionplasma,arethe14.7MeVprotonsand3.6MeVαparticles.Becausetheirslowingdowntimesarefinite,therefore,theydevelopacertainamountofadditionalbeta(fir)whichhastobesupportedbythemagneticfield.

  • 标签: 电流放大系数 快离子 聚变等离子体 质子 Α粒子
  • 简介:Anapproachforgeneratinginteractive3Dgraphicalvisualizationofthegeneticarchitecturesofcomplextraitsinmultipleenvironmentsisdescribed.3Dgraphicalvisualizationisutilizedformakingimprovementsontraditionalplotsinquan-titativetraitlocus(QTL)mappinganalysis.Interactive3DgraphicalvisualizationforabstractexpressionofQTL,epistasisandtheirenvironmentalinteractionsforexperimentalpopulationswasdevelopedinframeworkofuser-friendlysoftwareQTLNetwork(http://ibi.zju.edu.cn/software/qtlnetwork).Noveldefinitionofgraphicalmetasystemandcomputationofvirtualcoordinatesareusedtoachieveexplicitbutmeaningfulvisualization.Interactive3DgraphicalvisualizationforQTLanalysisprovidesgeneticistsandbreedersapowerfulandeasy-to-usetooltoanalyzeandpublishtheirresearchresults.

  • 标签: 遗传结构 数量性状基因座 三维图形可视化 复杂性状
  • 简介:HeteroepitaxialLaAlO3filmsweregrownonaSrTiO3/Si(100)substratebylasermolecularbeamepitaxyunderdifferentoxygenpressures,andtheirpropertiessuchascrystallinityandelectricalcharacteristicswereexperimentallyinvestigatedusingthevariousmeasurementmethods.Theresultsshowthatmostpropertiesdependmainlyonthedepositionoxygenpressure.ThecrystallinityandtheC-VandI-Vcharacteristicscanbegreatlyimprovedwiththeincreasingoxygendepositionpressure.Moreover,afterannealedat1050~CinN2ambient,theC-VandI-VcharacteristicsofLAOfilmsdepositedattheloweroxygenpressurearealsoimprovedduetothedecreaseofoxygenvacanciesinLAOfilms.

  • 标签: 铝酸镧 薄膜外延 生长工艺 硅基 氧化压力
  • 简介:IntercalationcompoundFePS3(CoCp2)0.40(CoCp2=cobaltocene)wassynthesized,andthecrystalstructureandmagneticpropertieswerestudiedbyx-raydiffraction,magneticsusceptibilitymeasurement,andMSssbauerspectroscopy.Thecrystalstructurewasindexedtomonoclinicunitcellwitha=5.996^。A,b=10.106^。A,c=12.511^。A,β=105.916°,andabout5.6^。Aexpansionatthec-directioncomparedtopureFePS3.TheMSssbauerspectraindicatethattherearethreekindsofdivalentionswithhighspinstateintheintercalationcompound,whichimplieschargetransferfromguesttotheFe-Se^*ganti-bondingorbitsofthehostlattice.Nocationicvacanciesareformedintheintercalationcompound.Theferromagnetismatlowtemperatureoriginatesfromthespincantingofdivalentions.

  • 标签: 磁学性质 二茂钴 晶体结构 X射线衍射 磁化率 分子磁体
  • 简介:Wereportthestudyofalowtemperatureclusterglassstatein5%Mn-dopedUGa3heavyfermioncompound.Thiscompoundtransformsfromaparamagneticstatetoaspin-clusterglassstate,whichisconfirmedbymeasuringthedcsusceptibilityandmagnetization.Theacsusceptibilityexhibitsafrequency-dependentpeakaroundTf,whichprovidesdirectevidenceoftheclusterglassstate.Byanalyzingthefield-dependentmagnetizationandfrequency-dependentacsusceptibilityindetail,wededucethatthiscompoundformsaspin-clusterglassstatebelowTf.

  • 标签: 玻璃态转变 自旋团簇 直流磁化率 交流磁化率 频率依赖性 化合物
  • 简介:AlNthinfilmsirradiatedwith100MeVU,95MeVArand84MeVCionsfromtheHIRFL-SFC(HeavyIonResearchFacilityinLanzhou)wereinvestigatedbyInfraredspectraandRamanspectra.ItappearedA1(TO),A1(LO),E1(To)andE2PhononvibrationabsorptionmodetoirradiatedsamplesinFig.1.652cm??1isvibrationabsorptionpeakofAlN,withtheincreaseofirradiationdose,thevibrationabsorptionbandappearacertainbroadeningphenomena.Lightercarbonionirradiationonthevibrationabsorptionbandbroadeningoftheimpactisnotbig.670cm??1isthetransverseopticalphononabsorptionpeakoftheE1(TO),afterirradiation,thevibrationabsorptionpeakandthebroadenAl-Nkeyintoanorganicwhole.249and660cm??1istheE2(low)andE2(high)

  • 标签: Characteristics IRRADIATED ENERGY
  • 简介:Arabidopsisthalianahasmanyadvantagesforplantresearch,includingashortgenerationtime,smallsize,largenumberofoffspring,andarelativelysmallnucleargenome.TheseadvantagespromoteddeepenscientificinvestigationforvariousbiologicalissuesandcharacterizedmanygenesusingArabidopsisthaliana[1].Inthisstudy,dryseedsofArabidopsisthalianawereirradiatedbyneonionbeamsfrom100to500Gy.Thenabout10dryseedsweresownonMurashigeandSkoogmedium,eachtreatmentgrouprepeatedforthreetimes,andalltheculturedishesweregrowninthecultureroomswiththeconditionof22?Cunder18h-light/6h-darkcycle.ImageJsoftwarewasusedtomeasurethelengthofrootsandhypocotylfromthedigitalphotostakenonthe7thdayaftersowing.

  • 标签: DOSE EFFECTS IRRADIATION
  • 简介:Inordertodeepentheunderstandingofthedifferencebetween0!1and1!0sinleeventupset(SEU)cross-sectioninanovelactivedelayelement(ADE)SRAM(StaticRandomAccessMemory)cell,theirradiationwascarriedoutatHeavyIonResearchFacilityinLanzhou(HIRFL).Usingthe86Kr26+ionsirradiatedthedeviceundertest(DUT)adoptedpartiallydepleted(PD)siliconofinsulator(SOI)technology.ThefeaturesizeofDUTfabricatedbyinstituteofmicroelectronic(IME)was180nm.TheschematicdiagramofSEUhardenADE-SRAMcellisshowninFig.1.TheADEisessentiallyaNMOSconnectedinonlyoneofthefeedbackpathsbetweenthetwoinventorsofthememorycell.Itplaysaroleasswitchingtransistor.Exceptduringawriteoperation,whentheswitchtransistoristurnedon(soasnottocompromisethewritespeed),theoff-ADEprovidesamuchgreaterRCdelaybetweenthetwoinventorsofthememorycelltoachievemuchimprovedSEUhardness[1].

  • 标签: SINGLE EVENT Upset
  • 简介:QuantumdynamicscalculationsforthetitlereactionH(2S)+S2(X3-Σg)→SH(X2Π)+S(3P)areperformedbyusingagloballyaccuratedoublemany-bodyexpansionpotentialenergysurface[J.Phys.Chem.A1155274(2011)].TheChebyshevrealwavepacketpropagationmethodisemployedtoobtainthedynamicalinformation,suchasreactionprobability,initialstate-specifiedintegralcrosssection,andthermalrateconstant.Itisfoundnotonlythatthereisareactionthresholdnear0.7eVinbothreactionprobabilitiesandintegralcrosssectioncurves,butalsothatboththeprobabilityandcrosssectionincreasefirstlyandthendecreaseasthecollisionenergyincreases.Theexistenceoftheresonancestructureinboththeprobabilityandcrosssectioncurvesisascribedtothedeeppotentialwell.Thecalculationoftherateconstantrevealsthatthereactionoccurringonthepotentialenergysurfaceoftheground-stateHS2isslowtotakeplace.

  • 标签: 反应概率 动力学计算 上海 量子 表面 截面曲线
  • 简介:ZnOfilmscontainingErandGenanocrystals(nc-Ge)weresynthesizedandtheirphotoluminescence(PL)propertieswerestudied.Visibleandnear-infraredPLintensitiesarefoundtobegreatlyincreasedinnc-Ge-containingfilm.Er-related1.54μmemissionhasbeeninvestigatedunderseveralexcitationconditionsupondifferentkindsofGe,ErcodopedZnOthinfilms.1.54μmPLenhancementaccompaniedbytheappearanceofnc-Geimpliesasignificantcorrelationbetweennc-GeandPLemissionofEr3+.Theincreasedintensityof1.54μminGe:Er:ZnOfilmisconsideredtocomefromthejointeffectofthelocalpotentialdistortionaroundEr3+andthepossibleenergytransferfromnc-GetoEr3+.

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