With the establishment of secondary beam facilities at many laboratories around the world, one can investi-gate the properties of nuclei very far from the β stability line and isospin degrees of freedom in nuclear re...With the establishment of secondary beam facilities at many laboratories around the world, one can investi-gate the properties of nuclei very far from the β stability line and isospin degrees of freedom in nuclear reactions at wide energy ranges. It is also possible to explore the chemical instability of hot and isospin-asymmetric nuclear matter. A better agreement with the experimental data has been found in our recent study by means of an isospin dependent quantum molecular dynamics (IQMD) mode. Recently experiments really reported the isospin dependence of multifragment production in reactions of ^58Fe+^58Fe and ^58Ni+^58Ni at higher incident energ.y; These phenomena may be related to the chemical instability in HIC induced by neutron-rich nuclei and therefore it is a challenge for theoretical and experimental nuclear physicists to investigate the chemical instability in heavv ion collisions.展开更多
Many theoretical methods, such as the non-relativistic Brueckner approach, relativistic Brueckner approach, variational many body, the relativistic mean field theory, non-relativistic many body theory and the quarkmes...Many theoretical methods, such as the non-relativistic Brueckner approach, relativistic Brueckner approach, variational many body, the relativistic mean field theory, non-relativistic many body theory and the quarkmeson coupling model, have been used to explore the properties of neutron stars. In the present work, we shall study the properties of neutron stars within the framework of Hartree-Fock theory using the extended Skyrme effective interaction[1]. Many theoretical studies indicate that the relation between the single nucleon energy and the relative neutron excess satisfies the parabolic law approximately when δ and density p is not too high, the δ^4 and higher-order terms of δ are negligible, we shall show the higher-order terms of symmetry energy are important in studying neutron stars.展开更多
文摘With the establishment of secondary beam facilities at many laboratories around the world, one can investi-gate the properties of nuclei very far from the β stability line and isospin degrees of freedom in nuclear reactions at wide energy ranges. It is also possible to explore the chemical instability of hot and isospin-asymmetric nuclear matter. A better agreement with the experimental data has been found in our recent study by means of an isospin dependent quantum molecular dynamics (IQMD) mode. Recently experiments really reported the isospin dependence of multifragment production in reactions of ^58Fe+^58Fe and ^58Ni+^58Ni at higher incident energ.y; These phenomena may be related to the chemical instability in HIC induced by neutron-rich nuclei and therefore it is a challenge for theoretical and experimental nuclear physicists to investigate the chemical instability in heavv ion collisions.
文摘Many theoretical methods, such as the non-relativistic Brueckner approach, relativistic Brueckner approach, variational many body, the relativistic mean field theory, non-relativistic many body theory and the quarkmeson coupling model, have been used to explore the properties of neutron stars. In the present work, we shall study the properties of neutron stars within the framework of Hartree-Fock theory using the extended Skyrme effective interaction[1]. Many theoretical studies indicate that the relation between the single nucleon energy and the relative neutron excess satisfies the parabolic law approximately when δ and density p is not too high, the δ^4 and higher-order terms of δ are negligible, we shall show the higher-order terms of symmetry energy are important in studying neutron stars.
