We investigate effect of isospin dependence of nucleon-nucleon (N-N) cross sectionσNNiso on the nuclear stopping R (momentum dissipation) as the increase of neutron-proton ratio of collision system in heavy ion colli...We investigate effect of isospin dependence of nucleon-nucleon (N-N) cross sectionσNNiso on the nuclear stopping R (momentum dissipation) as the increase of neutron-proton ratio of collision system in heavy ion collisions. This effect is indicated by the difference between R's for isospin independent in-medium N-N cross sections;σ1noiso and isospin dependent in-medium N-N cross sectionσNNiso.Where the isospin independent N-N cross sectionσ1noiso is defined asσnn=σpp=σnp. An empirical isospin dependent expression of the inmedium nucleon nucleon cross section展开更多
We studied the influence of a medium correction of an isospin dependent nucleon nucleon cross section on the proton and neutron emissions at the intermediate energy heavy ion collisions by using an isospin dependent q...We studied the influence of a medium correction of an isospin dependent nucleon nucleon cross section on the proton and neutron emissions at the intermediate energy heavy ion collisions by using an isospin dependent quantum molecular dynamics model. The calculated results show that the medium correction of an isospin dependent nucleon nucleon cross section enhances the dependence of the proton and neutron emissions on展开更多
Effect of isospin dependence of nucleon-nucleon (N-N) cross sectionσNNiso on the isospin fractionation ratio (n/p)free/(n/p)liq as the increase of neutron-proton ratio of collision system (n/p)sys is investigated in ...Effect of isospin dependence of nucleon-nucleon (N-N) cross sectionσNNiso on the isospin fractionation ratio (n/p)free/(n/p)liq as the increase of neutron-proton ratio of collision system (n/p)sys is investigated in heavy ion collisions. Where the isospin independent N-N cross sectionsσ1noiso andσ2noiso are defined asσnn=σpp =σnp(σ1noiso) andσnn=σpp=(1/2) (σnp+σnn)(σ2noiso) respectively. An empirical density dependent expression of the in-medium N-N cross section展开更多
In order to investigate the roles of gas phase and liquid phase on the the isospin fractionation process respectively,the degree of isospin fractionation < (N/Z)n>b/<(N/Z)imf >b is measured by the saturate...In order to investigate the roles of gas phase and liquid phase on the the isospin fractionation process respectively,the degree of isospin fractionation < (N/Z)n>b/<(N/Z)imf >b is measured by the saturated neutron-proton ratios of the nucleon emission (gas phase),(N/Z)n>b and fragment emission ,< (N/Z)imf>b (liquid phase ) in the intermediate energy heavy ion collisions. From the calculated results we found that展开更多
文摘We investigate effect of isospin dependence of nucleon-nucleon (N-N) cross sectionσNNiso on the nuclear stopping R (momentum dissipation) as the increase of neutron-proton ratio of collision system in heavy ion collisions. This effect is indicated by the difference between R's for isospin independent in-medium N-N cross sections;σ1noiso and isospin dependent in-medium N-N cross sectionσNNiso.Where the isospin independent N-N cross sectionσ1noiso is defined asσnn=σpp=σnp. An empirical isospin dependent expression of the inmedium nucleon nucleon cross section
文摘We studied the influence of a medium correction of an isospin dependent nucleon nucleon cross section on the proton and neutron emissions at the intermediate energy heavy ion collisions by using an isospin dependent quantum molecular dynamics model. The calculated results show that the medium correction of an isospin dependent nucleon nucleon cross section enhances the dependence of the proton and neutron emissions on
文摘Effect of isospin dependence of nucleon-nucleon (N-N) cross sectionσNNiso on the isospin fractionation ratio (n/p)free/(n/p)liq as the increase of neutron-proton ratio of collision system (n/p)sys is investigated in heavy ion collisions. Where the isospin independent N-N cross sectionsσ1noiso andσ2noiso are defined asσnn=σpp =σnp(σ1noiso) andσnn=σpp=(1/2) (σnp+σnn)(σ2noiso) respectively. An empirical density dependent expression of the in-medium N-N cross section
文摘In order to investigate the roles of gas phase and liquid phase on the the isospin fractionation process respectively,the degree of isospin fractionation < (N/Z)n>b/<(N/Z)imf >b is measured by the saturated neutron-proton ratios of the nucleon emission (gas phase),(N/Z)n>b and fragment emission ,< (N/Z)imf>b (liquid phase ) in the intermediate energy heavy ion collisions. From the calculated results we found that
