分类: 物理学 >> 核物理学 提交时间: 2023-06-18 合作期刊: 《Nuclear Science and Techniques》
摘要: An improved isospin dependent Boltzmann Langevin model, in which the inelastic channels and momentum dependent interactions are incorporated, is used to investigate the high-density behavior of nuclear symmetry energy. By taking several forms of nuclear symmetry energy, we calculate the time evolutions of neutron over proton ratio, multiplicity and /+ ratio, and the kinetic energy and transverse momentum spectra of /+ ratio in the heavy ion collisions at 400A MeV. It is found that the neutron over proton ratio and /+ ratio are very sensitive to the nuclear symmetry energy, and the is more sensitive to the nuclear symmetry energy than the +. A supersoft symmetry energy results in a larger /+ ratio.