【摘 要】
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Potential energy surfaces and fission barriers of superheavy nuclei are analyzed in a macroscopic-micro-scopic model.The Lublin-Strasbourg Drop (LSD) model is used to obtain the macroscopic part of the energy,whereas the shell and pairing energy correctio
【机 构】
：
Institute of Physics,Maria Curie Sk(l)odowska University,20-031 Lublin,Poland;Department of Physics,
论文部分内容阅读
Potential energy surfaces and fission barriers of superheavy nuclei are analyzed in a macroscopic-micro-scopic model.The Lublin-Strasbourg Drop (LSD) model is used to obtain the macroscopic part of the energy,whereas the shell and pairing energy corrections are evaluated using the Yukawa-folded potential;a standard flood-ing technique is utilized to determine barrier heights.A Fourier shape parametrization containing only three deform-ation parameters is shown to effectively reproduce the nuclear shapes of nuclei approaching fission.In addition,a non-axial degree of freedom is taken into account to better describe the structure of nuclei around the ground state and in the saddle region.In addition to the symmetric fission valley,a new highly asymmetric fission mode is pre-dicted in most superheavy nuclei.The fission fragment mass distributions of the considered nuclei are obtained by solving 3D Langevin equations.
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