【摘 要】
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The fusion dynamics of the formation of super-heavy nuclei were investigated thoroughly within the din-uclear system model.The Monte Carlo approach was implemented in the nucleon transfer process to include all possible orientations,at which the dinuclear
【机 构】
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School of Physics and Optoelectronic Technology,South China University of Technology,Guangzhou 51064
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The fusion dynamics of the formation of super-heavy nuclei were investigated thoroughly within the din-uclear system model.The Monte Carlo approach was implemented in the nucleon transfer process to include all possible orientations,at which the dinuclear system is assumed to be formed at the touching configuration of dinuclear fragments.The production cross sections of superheavy nuclei Cn,Fl,Lv,Ts,and Og were calculated and compared with the available data from Dubna.The evaporation residue excitation functions in the channels of pure neutrons and charged particles were systematically analyzed.The combinations of 44Sc,48,50Ti,49,51V,52,54Cr,58,62Fe,and 62,64Ni bombarding the actinide nuclides 238U,244Pu,248Cm,247,249Bk,249,251Cf,252Es,and 243Am were calculated to produce the superheavy elements with Z=119-122.We obtained that the production cross sections sensitively depend on the neutron richness of the reaction system.The structure of the evaporation residue excitation function is related to the neutron separation energy and fission barrier of the compound nucleus.
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