中高能重离子碰撞的自洽相对论微观输运理论的新发展

This NNSFC supported project is further development and application of the microscopic transport theory for heavy ion collisions established in our previous research projects supported by NNFSC . We have developed a self-consistent RBUU theory. Based on this model we have studied the K+ production in heavy ion collisions at energies near the threshold. It is shown that the Kˉ mesons are mainly produced by the processes of π Y→ K- X和π B→ K-X rather than BB→ K-X . We have studied the effects of the isospin dependent term of the equation of state for the asymmetric nuclear matter (EOS) on the dynamics of heavy ion collisions from various aspects, from which we have gained the knowledge of the equilibration in heavy ion collisions and the sensitive observables for probing the EOS of the asymmetric nuclear matter. We have developed an improved quantum molecular dynamics model and with this model we have studied the dynamics of heavy ion fusion reactions at the energies of near the barrier. The results show that this model seems to be a useful model for studying the mechanism of synthesis for super-heavy elements.

完善包括核子、Δ和N*自由度的自洽的相对论微观输运理论模型并使之实用化, 在此基础上研究相对论重离子碰撞的集体流及粒子产生等多种实验观察量与核态方程的关系, 集中弄清在几倍正常核密度区是否存在Δ物质及Δ, N*在重离子碰撞中的动力学过程的作用, 探索发展包括手征的相对论微观输运理论模型。