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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,August 20,2009,Giessen,*,采用热熔合方法合成超重核的理论研究,王楠,深圳大学,兰州,2012,年8月10日,合作者,:,赵恩广,(,中科院 理论物理所),周善贵,(,中科院 理论物理所),李君清,(,中科院 近代物理所),W.Scheid,(Giessen University,Giessen),1,Giessen,采用热熔合方法合成超重核的理论研究 王楠 兰州合作,Outline,Introduction,Theoretical Models,Results and discussions,Summary,2,Giessen,Outline Introduction2Giessen,Super-heavy elements up to,Z=118,have been synthesized experimentally.,Z=107-113:cold fusion,208,Pb/,209,Bi based reactions by evaporating 1 or 2 neutrons,(,Rev.Mod.Phys.72(2000)733,Rep.Prog.Phys.61(1998)639),Z=112-118:,48,Ca induced fusion reactions,48,Ca bombarding actinide targets by,evaporating 3-5 neutrons,(,J.Phys.G34(2007)R165,NPA787(2007)343c,PRC 83,054315(2011),),IMP in Lanzhou:,259,Db,265,Bh,271,Ds,Experimental achievements,3,Giessen,Z=107-113:cold fusion,208Pb/,Theoretical models for SHN production,Macroscopic dynamical model,S.Bjornholm and W.J.Swiatecki,Fusion by diffusion model,Y.Abe,Y.Aritomo,Z.H.Liu,J.D.Bao,C.W.Shen,K.Siwek-Wilczynska et al,Nucleon collectivization model,V.I.,Zagrebaev,Dinuclear system model,V.V Volkov,G.G.Adamian,N.V.Antonenko,A.K.Nasirov,W.Scheid,et al,J.Q.Li,E.G.Zhao,S.G.Zhou,Z.Q.Feng,M.H.Huang,Nan Wang et al,Other model,Ning Wang,4,Giessen,Theoretical models for SHN pro,Evaporation residue cross section:,T,P,EN,CN,CF,capture,fusion,evaporation,Schematic picture of the formation of SHN,5,Giessen,Evaporation residue cross sect,Capture of two colliding nuclei,Transmission probability calculated from,barrier distribution:,The value of,1,is 2-4 MeV,less,than the one of,2,V.I.Zagrebaev,Phys.Rev.C 64(2001)034606,6,Giessen,Capture of two colliding nucle,The formation of compound nuclei is the fusion along the mass asymmetry degree of freedom.,Dinuclear system concept (from the investigation of deep inelastic collisions),Di-nuclear system concept,V.V.Volkov,Phys.Rep.44(1978)93,7,Giessen,The formation of compound nuc,Formation of compound nucleus-Master equation,Hamiltonian,8,Giessen,Formation of compound nucleus,Li,Wang，Li et al.,J.Phys.G 32(2006)1143,development of dynamical deformation,G.Wolschin,Phys.Lett.B 88(1979)35,Effects of nuclear static deformation and dynamical deformation,C.Riedel,G.Wolschin,and W.Noerenberg,Z.Phys.A 290,47(1979).,9,Giessen,Li,Wang，Li et al.,J.Phys.G,Potential energy surface,Excitation energy of DNS,Potential Energy Surface(PES),Intrinsic energy,G.Wolschin,Phys.Lett.B 88(1979)35,C.Riedel,G.Wolschin,and W.Noerenberg,Z.Phys.A 290,47(1979).,V.I.Zagrebaev,Phys.Rev.C 64(2001)034606,Deformation dependent,10,Giessen,Potential energy surfaceExcita,Driving potential,Intrinsic energy and PES for,50,Ti+,249,Cf,Nan Wang,En-guang Zhao,Werner Scheid and Shan-gui Zhou,Phys.Rev.C 85(2012)041601(R),11,Giessen,Driving potentialIntrinsic ene,Driving potential,12,Giessen,Driving potential12Giessen,The thermal compound nucleus will decay by evaporating,-ray,light particles and fission.The survival probabilities can be written as,Survival probability of excited compound nucleus,13,Giessen,The thermal compound nucleus w,Results and discussions,Capture cross sections for,48,Ca+,238,U,237,Np,242,Pu,244,Pu,243,Am,248,Cm,249,Bk,249,Cf,Exp.W.Q.Shen et al,PRC 88(1979)35,M.G.Itkis,et al,Proceedings of International,Workshop on Fusion Dynamics at the Extremes,Dubna,Russia,2000,(2001).,14,Giessen,Results and discussionsCapture,Potential energy surface and Pcn for,48,Ca+,238,U,48,Ca+,248,Cm,15,Giessen,Potential energy surface and P,Fusion probabilities for some hot fusion reactions,16,Giessen,Fusion probabilities for some,Survival probabilities for some compound nuclei produced in hot fusion reactions,17,Giessen,Survival probabilities for som,Excitation functions for,48,Ca+,238,U,237,Np,Exp.,Yu.Ts.Oganessian,et al.,PRC 70(2004)064609,18,Giessen,Excitation functions for 48Ca+,Evaporation residue cross sections for,48,Ca+,242,244,Pu,Exp.,Yu.Ts.Oganessian et al.,PRC 70(2004)064609,P.A.Ellison,et al,PRL,105,(2010)182701,19,Giessen,Evaporation residue cross sect,Evaporation residue cross sections for,48,Ca+,243,Am,248,Cm,Exp.,Yu.Ts.Oganessian et al.,PRC 69(2004)021601(R),PRC 70(2004)064609,S.Hofmann,S.Heinz,R.Mann,et al.,Euro.Phys.J.A,48,(2012)1,20,Giessen,Evaporation residue cross sect,Evaporation residue cross sections for,48,Ca+,249,Bk,249,Cf,Exp.,Yu.Ts.Oganessian et al.,PRC 74.044602(2006),PRC 83,054315(2011),21,Giessen,Evaporation residue cross sect,Evaporation residue cross sections for the SHN 112-120,22,Giessen,Evaporation residue cross sect,Experiment about synthesis of elements 120,C.E.Dullmann,“News from TASCA”,talk given at the 10thWorkshop on Recoil Separator for,Superheavy Element Chemistry,October 14,2011,GSI Darmstadt,Germany(unpublished),Yu.Ts.Oganessian,et al.,PRC 79(2009)024603,50,Ti,+,249,Cf,58,Fe,+,244,Pu,23,Giessen,Experiment about synthesis of,Theoretical investigations of the production of SHN 119 and 120,A.K.Nasirov et al.PRC 79(2009)024606,Ning Wang,J.L.Tian,W.Scheid PRC 84(2011)061601(R),V.Zagrebaev,W.Greiner PRC 78(
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