This show us a very useful signal in studying the systematic property in the early stage of the evolutive colliding system , that ' s , a non - zero flow component of those particles observed by experiment could be interpreted as a signal for partonic flow 因此在碰撞早期产生的重子数输运是高能重离子碰撞中的一个重要的物理量，它影响着初态部分子的平衡，粒子的产生，系统的热力学或化学平衡以及集体膨胀等过程。
Up to now , research on strong interaction with theory model , such as the diagnosing the signal of quark - gluon plasma existence , mostly based on quark - gluon plasma system in high energy heavy ion collision is in chemical and thermal equilibrium 我们知道，到目前为止，利用理论模型进行的强相互作用方面的研究（比如：得到qgp存在的信号厂多以在高能重离子碰撞中的夸克胶子系统是处于化学平衡和热平衡的为基础的。
Among the heavy ion experiments . the minimum value is observed in c - cu collision . but the low multiplicity of this experiment and the vague intermittency in nuclear - nuclear collisions result in large error when the analysed rank of a , is high 虽然重离子碰撞c - cu中看到了_ q出现极小值的现象，但核核碰撞中间歇不明显，该实验中多重数较低，这些都导致对_ q的分析阶数较高时，误差已很大，结果的有效性需检验。
The isospin effect and k production in intermediate and high energy heavy ion collisions ( hics ) are hot topics in the nuclear physics . based on the isospin - dependent quantum molecular dyanmics ( iqmd ) model and self - consistent relativistic boltzmann - uehling - uhlenbeck ( rbuu ) model , we have studied them and obtained some interesting results . as for the study of isospin in intermediate energy hics , we ' ve investigated how both stength ( q ) and density dependence of symmetry potential ( sp ) affect many measurable observables , such as the yield , phase - space , and isospin distributions of fragments , as well as the correlations between intermediate - mass - fragment ( imf ) multiplicity n and charged - particle multiplicity n , , light - charged - particle ( lcp ) multiplicity n , and neutron multiplicity n , 在中能重离子碰撞的同位旋研究方面，分别研究了对称势的强度( c _ s )和其密度依赖形式对中能重离子核反应各类碎片产物产额、相空间、及其同位旋的分布，中等质量碎片多重数( n _ ( imf ) )与带电粒子多重数( n _ c ) 、轻带电粒子多重数( n _ k ) 、中子多重数( n _ n )的关联等多种实验观测量的影响，以获取对称势中该两方面的信息，尤其着重于研究如何分别获取有关该两方面的信息的途径。
Based on the revers kinetic intermediate energy heavy ion collision in which much more intermediate mass fragments are emitted towards forward angles , a sensitive observable on isospin effects in heavy ion collisions is investigated by means of using isospin dependent quantum molecular dynamics ( iqmd ) 摘要在重离子碰撞过程中，基于重质量的弹核轰击轻质量靶核有大量中等质量碎片向前发射的逆运动学效应，利用同位旋相关的量子分子动力学观察和研究了重离子碰撞过程中同位旋效应的灵敏性。
As for the k production in high energy hics , we firstly study k + production . the results show that the kaon flow is sensitive to both the kaon - nucleon sigma term ( s and the equation of state of nuclear matter . the collective flows of both nucleons and k + mesons need a " soft " eos with compressibility k ? 00 - 300 mev , and 2 = 200 - 400 mev seems suitable to explain the measured k + flow 研究表明k ~ +集体流在相对论重离子碰撞中对核态方程和k - n标量吸引项( _ ( kn ) )都是敏感的，计算结果表明核子和k ~ +介子的横向集体流都需要压缩系数在k 200 - 300mev范围内较软的核态方程，而大约为200 - 400mev的_ ( kn )值对解释k ~ +流产生是合适的。
