The threshold energies of radial flow in reactions of ^40 Ca-^40Ca and ^48Ca＋ ^48Ca in central collisions are investigated within an isospin dependent quantum molecular dynamics model by using three different forms o...The threshold energies of radial flow in reactions of ^40 Ca-^40Ca and ^48Ca＋ ^48Ca in central collisions are investigated within an isospin dependent quantum molecular dynamics model by using three different forms of symmetry energy. It is found that the neutron-rich system has smaller threshold energy of radial flow and this quantity depends on the form of symmetry potential. It is indicated that the threshold energy of radial flow can provide a new method to determine the symmetry energy of asymmetric nuclear matter.展开更多
A novel method is proposed to measure the interaction cross sections of short-lived hypernuclei with the WASA-FRS experimental setup at GSI and FAIR.The interaction cross sections of hypernuclei,produced in projectile...A novel method is proposed to measure the interaction cross sections of short-lived hypernuclei with the WASA-FRS experimental setup at GSI and FAIR.The interaction cross sections of hypernuclei,produced in projectile fragmentation reactions at relativistic energies,can be determined from their production point distribution within a target.The feasibility of such a measurement is evaluated through detailed Monte Carlo simulations.The results indicate that an aimed uncertainty on the order of 10%can be achieved for the case of a hypertriton,demonstrating the potential of this method for studying matter radii and the possible hyperon halo structure of hypernuclei.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 10575012 and 10435020, the Science Foundation of Beljlng, and the Science Foundation of Beijing Normal University.
文摘The threshold energies of radial flow in reactions of ^40 Ca-^40Ca and ^48Ca＋ ^48Ca in central collisions are investigated within an isospin dependent quantum molecular dynamics model by using three different forms of symmetry energy. It is found that the neutron-rich system has smaller threshold energy of radial flow and this quantity depends on the form of symmetry potential. It is indicated that the threshold energy of radial flow can provide a new method to determine the symmetry energy of asymmetric nuclear matter.
文摘A novel method is proposed to measure the interaction cross sections of short-lived hypernuclei with the WASA-FRS experimental setup at GSI and FAIR.The interaction cross sections of hypernuclei,produced in projectile fragmentation reactions at relativistic energies,can be determined from their production point distribution within a target.The feasibility of such a measurement is evaluated through detailed Monte Carlo simulations.The results indicate that an aimed uncertainty on the order of 10%can be achieved for the case of a hypertriton,demonstrating the potential of this method for studying matter radii and the possible hyperon halo structure of hypernuclei.
