Nuclear dynamics induced by antiprotons  

作　　者：冯兆庆 

机构地区：[1]Institute of Modern Physics,Chinese Academy of Sciences [2]State Key Laboratory of Theoretical Physics and Kavli Institute for Theoretical Physics China,Chinese Academy of Sciences

出　　处：《Nuclear Science and Techniques》2015年第2期143-148,共6页核技术（英文）

基　　金：Supported by the Major State Basic Research Development Program in China(Nos.2014CB845405 and 2015CB856903);the National Natural Science Foundation of China Projects(Nos.11175218 and U1332207);the Youth Innovation Promotion Association of Chinese Academy of Sciences

摘　　要：Reaction dynamics in collisions of antiprotons on nuclei is investigated within the Lanzhou quantum molecular dynamics model. The reaction channels of elastic scattering, annihilation, charge exchange and inelastic collisions of antiprotons on nucleons have been included in the model. Dynamics on particle production, in particular pions, kaons, antikaons and hyperons, is investigated in collisions of p on12 C,20Ne,40 Ca and181Ta from low to high incident momenta. It is found that the annihilations of p on nucleons are of importance to the dynamics of particle production in phase space. Hyperons are mainly produced via meson induced reactions on nucleons and strangeness exchange collisions, which lead to delayed emission in antiproton-nucleus collisions.Reaction dynamics in collisions of antiprotons on nuclei is investigated within the Lanzhou quantum molecular dynamics model. The reaction channels of elastic scattering, annihilation, charge exchange and inelastic collisions of antiprotons on nucleons have been included in the model. Dynamics on particle production, in particular pions, kaons, antikaons and hyperons, is investigated in collisions of p on12 C,20Ne,40 Ca and181Ta from low to high incident momenta. It is found that the annihilations of p on nucleons are of importance to the dynamics of particle production in phase space. Hyperons are mainly produced via meson induced reactions on nucleons and strangeness exchange collisions, which lead to delayed emission in antiproton-nucleus collisions.

关 键 词：量子分子动力学模型 非弹性碰撞 反应动力学 子核 诱发 粒子动力学 反质子 弹性散射 

分 类 号：O571.422[理学—粒子物理与原子核物理]