Systematic study of dynamical dipole mode via the isospin-dependent Boltzmann-Uehling-Uhlenbeck model  

作　　者：叶绍强 蔡翔舟 方德清 马余刚 沈文庆 

机构地区：[1]Shanghai Institute of Applied Physics,Chinese Academy of Sciences [2]University of Chinese Academy of Sciences

出　　处：《Nuclear Science and Techniques》2014年第3期55-59,共5页核技术（英文）

基　　金：Supported partially by the National Natural Science Foundation of China projects(Nos.11220101005,11035009,11175231 and 10979074);the Major State Basic Research Development Program in China(No.2013CB834405);the Knowledge Innovation Project of the Chinese Academy of Sciences(No.KJCX2-EW-N01)

摘　　要：Dynamical dipole mode in heavy-ion collisions has been studied by using an isospin-dependent BoltzmannUehling-Uhlenbeck(IBUU) model. We investigate the dependence of centroid energy and strength of the γspectrum on beam energy, N/Z ratio and mass asymmetry. The calculated yield and angular distribution of theγ-ray produced by dynamical dipole emission are consistent with the experimental data. The results show that the detailed study of dynamical dipole radiation can provide information on the isospin evolution of chargeasymmetric heavy-ion collisions around the normal nuclear density.Dynamical dipole mode in heavy-ion collisions has been studied by using an isospin-dependent Boltzmann- Uehling-Uhlenbeck （IBUU） model. We investigate the dependence of centroid energy and strength of the γ spectrum on beam energy, N/Z ratio and mass asymmetry. The calculated yield and angular distribution of the γ-ray produced by dynamical dipole emission are consistent with the experimental data. The results show that the detailed study of dynamical dipole radiation can provide information on the isospin evolution of charge- asymmetric heavy-ion collisions around the normal nuclear density.

关 键 词：同位旋相关 碰撞动力学 偶极辐射 模型系统 重离子碰撞 玻尔 质心能量 不对称性 

分 类 号：O572.2[理学—粒子物理与原子核物理]