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.