九大原子核セミナー

2018年10月19日(金) 16:30〜18:00

講師： 鷲山 広平 氏 (九州大学)
演題：Fusion hindrance in heavy nuclear systems with time-dependent Hartree-Fock

場所：ウェスト1号館7階 物理セミナー室2 (W1-A-722室)

概要：
The interplay between static and dynamical effects in nuclei is crucial for appropriate description of heavy-ion fusion reactions at energies around the Coulomb barrier. Coupled-channels calculations have been widely used to quantitatively describe the entrance channel of fusion reactions in light- and medium-mass systems, whose charge product (ZpZt) is less than 1600. In heavy systems (ZpZt >1600), it was observed that the fusion probability is strongly hindered around the Coulomb barrier, compared with light and medium-mass systems and with coupled-channels calculations. This phenomenon is called fusion hindrance. Quasi-fission process is considered to be mostly responsible for this hindrance. I address this problem by microscopic time-dependent Hartree-Fock (TDHF) model. I will show the analysis of fusion hindrance from head-on collision simulations of TDHF. Then, I will show recent progress of quasi-particle random-phase approximation in three-dimensional space. This will be used to compute mass parameters along fission paths.