科研之友
微信
新浪微博
Facebook
分享链接
摘要
Subthreshold kaon (K-0 and K+) production in neutron-rich nuclear reactions to probe the kaon-nucleon interaction in nuclear medium and to extract the isospin-dependent part of the nuclear equation of state at high-baryon densities is investigated within an isospin- and momentum-dependent transport model. A repulsive kaon-nucleon potential is implemented in the model through fitting the flow data and inclusive spectra in heavy-ion collisions, which enhances the energetic kaon emission squeezed out in the reaction zone and leads to a variation of the high-momentum spectrum of the K-0/K+ yields. It is found that the stiffness of nuclear symmetry energy plays a significant role on the isospin ratio with decreasing the incident energy and a hard symmetry energy has a larger value of the K-0/K+ ratio in the domain of subthreshold energies.
- 出版日期2013-6-10
- 单位中国科学院近代物理研究所
