摘要
Potential energy surfaces and fission barriers of superheavy nuclei are analyzed in a macroscopic-microscopic 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 flooding technique is utilized to determine barrier heights.A Fourier shape parametrization containing only three deformation 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 predicted in most superheavy nuclei.The fission fragment mass distributions of the considered nuclei are obtained by solving 3D Langevin equations.
作者
Pavel V.Kostryukov
Artur Dobrowolski
Bozena Nerlo-Pomorska
Michal Warda
Zhigang Xiao
Yongjing Chen
Lile Liu
Jun-Long Tian
Krzysztof Pomorski
Pavel V.Kostryukov;Artur Dobrowolski;Bozena Nerlo-Pomorska;Michal Warda;肖志刚;陈永静;刘丽乐;田俊龙;Krzysztof Pomorski(Institute of Physics,Maria Curie Sklodowska University,20-031 Lublin,Poland;Department of Physics,Tsinghua University,Beijing 100084,China;Institute of Atomic Energy,Beijing 102413,China;School of Physics and Electrical Engineering,Anyang Normal University,Anyang 455000,China)
基金
Supported by the Polish National Science Center(2018/30/Q/ST2/00185)
the National Natural Science Foundation of China(11961131010,11790325)。
