简介:Theionsaturationcurrentisveryimportantinprobetheory,whichcanbeusedtomeasuretheelectrontem-peratureandthefloatingpotential.Inthiswork,theeffectsofenergeticionsontheionsaturationcurrentarestudiedviaparticle-in-cellsimulations.Itisfoundthattheenergeticionsandbackgroundionscanbetreatedseparatelyasdifferentspecies,andthevsatisfytheirindividualBohmcriterionatthesheathedge.
简介:Theself-diffusionofEu^3+ioninporousresinsD72andD751wasstudiedbyisotopeexchangereaction.ApplyingKataoka'sbidisperseporemodel,theintraparticleeffectivediffusivityDewereresolvedintoasoliddiffusivityDgandamacroporediffusivityDp.TheexperimentsshowthatDe.DpandDgallincreasewiththeincreaseofreactiontemperature;theresponseDpandDgofD751resinissmallerthanthatofD72resin;thediffusivityofEu^3+ioninsolutionislargerthanDp,whichleadstotheconclusionthatthediffusionofionintheporeofresincannotcompletelybeequaltothatinsolution.
简介:Anewionexchangekineticsequationincludingresinphasesaturationfactorispresentedinthispaper.Theequationischaracterizedbytheapparentreactionorderandapparentsaturationorder.
简介:RadioactiveIonBeamLineinLanzhou¥ZhanWenlong;GuoZhongyan;LiuGuanhua;YinQuanmin;ZhouJianqunandWangYifangAsanewfrontierinnu...
简介:Progress of IMP Laser Ion SourceProgressofIMPLaserIonSource¥ZhaoZhizheng;YangYongfengandCaiXichenLotsOfprogressesofIMPlaserio...
简介:Experimentshaveshownthattheionenergyobtainedbylaser–ionaccelerationcanbeoptimizedbychoosingeithertheappropriatepulsedurationortheappropriatetargetthickness.WedemonstratethatthisbehaviorcanbedescribedeitherbythetargetnormalsheathaccelerationmodelofSchreiberetal.orbytheradiationpressureaccelerationmodelofBulanovandcoworkers.Thestartingpointofourconsiderationsisthattheessentialpropertyofalasersystemforionaccelerationisitspulseenergyandnotitsintensity.Maybesurprisinglyweshowthathigherionenergiescanbereachedwithreducedintensities.
简介:WatersorptionisothermsavailableintheliteraturesofNa^+-fromofDowex50W×4and×8,BioRex-70,Amberlyst-15,Nafion-117,hydroustitaniumoxide,crystallinezirconiumphosphateandzinchexacyanoferrate(Ⅱ),havebeenanalysedbytheD′ArcyandWattequation.HydrationofNa^+intheionexchangersisthepredominantinteractionofsorbedwater.Thecorrelationbetweenthehydrationnumbersandthoseobtainedforelectrolytesolutionisfoundinthispaper.Qualitativeimplicationsofthestateofsorbedwaterintheionexchangersonitsvariouscharacteristicquantitieslikeselectivity,arebrieflydiscussed.
简介:Ionchannelsareessentialforcellularsignaling.Voltage-gatedionchannels(VGICs)arethelargestandmostextensivelystudiedsuperfamilyofionchannels.Theypossessmodularstructuralfeaturessuchasvoltage-sensingdomainsthatencircleandformmechanicalconnectionswiththepore-formingdomains.Suchfeaturesareintimatelyrelatedtotheirfunctioninsensingandrespondingtochangesinthemembranepotential.Inthepresentwork,wediscussthethermodynamicmechanismsoftheVGICsuperfamily,includingthetwo-stategatingmechanism,sliding-rockingmechanismofthevoltagesensor,subunitcooperation,lipid-infiltrationmechanismofinactivation,andtherelationshipwiththeirstructuralfeatures.
简介:Inthispaper,thecontinuouselectroregenerationofionexchangeresinisinvestegated.Themixedresinisinsertedbetweenacationexchangemembraneandananionexchangemembrane.Theeffluentwateroffreshwaterroommeetsthedemandforpowerplantonwatertreatment.TheB2thatisthecumulativeformationconstantofthemetalcomplexesofresinisverydifferentewithorwithoutelectricfield.Itindicatesthatthedissociationdegreeofmetalcomplexesofresinisgreaterwitelectricfieldthanthatwithoutelectricfield.
简介:Anionbeamhastheuniquefeatureofbeingabletodeposititsmainenergyinsideahumanbodytokillcancercellsorinsidematerial.However,conventionalionacceleratorstendtobehugeinsizeandcost.Inthispaper,afutureintenselaserionacceleratorisdiscussedtomakethelaser-basedionacceleratorcompactandcontrollable.Theissuesinthelaserionacceleratorincludetheenergyefficiencyfromthelasertotheions,theionbeamcollimation,theionenergyspectrumcontrol,theionbeambunching,andtheionparticleenergycontrol.Inthestudy,eachcomponentisdesignedtocontroltheionbeamqualitybyparticlesimulations.Theenergyefficiencyfromthelasertoionsisimprovedbyusingasolidtargetwithafinesub-wavelengthstructureoranear-critical-densitygasplasma.Theionbeamcollimationisperformedbyholesbehindthesolidtargetoramulti-layeredsolidtarget.Thecontroloftheionenergyspectrumandtheionparticleenergy,andtheionbeambunchingaresuccessfullyrealizedbyamulti-stagelaser–targetinteraction.
简介:Weconsideronesourceofdecoherenceforaquantumcomputercomposedofmanytrappedionsduetothethermaleffectsofthesysteminthepresenceoflaser-ioninteraction.Theupperlimitofthetemperatureatwhichthelogicalgateoperationscouldbecarriedoutreliablyisgiven,andourresultisagreementwiththeexperiment.
简介:1IntroductionThenickelaloysandcomplexesarewidelyusedasmagnetic,optical,nuclearandsuperconductingmaterials[1,2].Manynickelcom...