One of the main purposes of heavy-ion collisions over a wide range of beam energy is to study the bulk properties of strong interaction matter and understand the Quantum Chromo Dy- namics （QCD） phase diagram, which ...One of the main purposes of heavy-ion collisions over a wide range of beam energy is to study the bulk properties of strong interaction matter and understand the Quantum Chromo Dy- namics （QCD） phase diagram, which carries wealth of infor- mation of the phase transition and the possibly existing criti- cal point of the strongly interacting system [1]. Such system exists as hadron gases at lower temperature and low baryon density. By increasing the temperature or density, the bound- ary of the hadrons disappears and the confined quarks move freely in the whole system.展开更多
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...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.展开更多
基金supported by National Program on Key Basic Research Project(Grant No.2015CB856903)National Natural Science Foundation of China(Grant No.U1332207)
文摘One of the main purposes of heavy-ion collisions over a wide range of beam energy is to study the bulk properties of strong interaction matter and understand the Quantum Chromo Dy- namics （QCD） phase diagram, which carries wealth of infor- mation of the phase transition and the possibly existing criti- cal point of the strongly interacting system [1]. Such system exists as hadron gases at lower temperature and low baryon density. By increasing the temperature or density, the bound- ary of the hadrons disappears and the confined quarks move freely in the whole system.
基金Supported by the Polish National Science Center(2018/30/Q/ST2/00185)the National Natural Science Foundation of China(11961131010,11790325)。
文摘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.
