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1、TheoreticalstudiesonpropertiesofsomesuperheavynucleiZhongzhouRENDepartmentofPhysics,NanjingUniversity,Nanjing,ChinaCenterofTheoreticalNuclearPhysics,NationalLaboratoryofHeavy-IonAccelerator,Lanzhou,ChinaOutlineIntroductionNuclearstructurecalculationsons
2、uperheavynuclei(RMF,SHF,MM,…)Half-livesofalphadecay:density-dependentclustermodel(DDCM)Summary1.introduction:experimentsZ=110(Ds),111(Rg),112wereproducedatGSI,Hofmann,Muenzenberg,Ackermann….Z.Phys.A,1995-1996,….Z=114-116,118,atDubna,byOganessianetal….Na
3、ture,1999;PRL,1999;PRC,2000-2007.Z=110-111,newresults,atBerkeley,PRL2004….Z=113,RIKEN,Morita,…,J.P.S.J.,2004.270Hs,Duellman,Turler,…,Nature2003,PRL2007.265Bh,Lanzhou,Gan,Qin,…,EPJA2004.1.introduction:theory.J.A.Wheeler,1950s:SuperheavynucleiWernerandWhe
4、eler,Phys.Rev.,109(1958)126.1960s-2000s,macroscopic-microscopicmodel(MM):Nilssonetal,Z=114andN=184….1970s-2000s:Skyrme-Hartree-Fock(SHF)Model;Z=126?N=184?1990s-2000s:RelativisticMean-Fieldmodel:Z=120?N=184?Sphericalordeformedforsuperheavynuclei???Werner
5、andWheeler,PR,1958:superheavynuclei2.Nuclearstructurecalculations2.1.RMFcalculationsonsuperheavynucleiZ=90-120：bindingenergies,deformations,…CompareRMFwithexperimentaldataRMFpredictionsonexperimentsRenetal.,PRC(2002-2005);NPA(2003-2005)…2.2Newidea:shape
6、coexistenceandsuperdeformationRenandToki,2001,NPA,Renetal,…2.3.ShapecoexistencefromothermodelsSHFmodelandMMmodelCwioketal,Nature433,2005.Gorielyetal.,Ato.Dat.Nucl.Dat.Tab.77(2001)311.2.1RMFresultsanddiscussionNuclei:Z=94—120;N=130—190.Comparisonoftheore
7、ticalbindingenergywithexprimentaldata.Comparisonoftheoreticalalphadecayenergywithexprimentaldata.Comparisonoftheoreticalquadrupoledeformationwithexprimentaldata.NucleiBthe.(1)BetapBthe.(2)BetapBexp.(MeV)234Pu1775.20.251773.80.281774.8236Pu1788.60.251787
8、.10.291788.4238Pu1801.10.261799.70.291801.3240Pu1813.70.271811.60.301813.5242Pu1825.50.281822.90.301825.0244Pu1836.20.261833.70.301836.1Table1,RMFresultsforPu.(TMAandNLZ2).ExperimentalBeta2=0.29for238-244Pu.NucleiBthe.(1)BetapBth
