Towards microscopic dynamics of dissipation in nuclear collective motion

For getting some microscopic understanding of dissipative dynamics in nuclear collective motion in a more dynamical way, a system with three degrees of freedom is examined within the time-dependent Hartree-Fock theory. Exploiting the self-consistent collective coordinate (SCC) method, the total system is optimally devided into the collective and intrinsic subsystems. The energy dissipation process and dynamical evolution process of each subsystem are numerically simulated and examined. The numerical results shows that the energy of collective motion is transfered to the environment and the regularity of collective degree of freedom is almost kept sticking to the KAM torus, and the intrinsic subsystem remains in chaotic situation so as to be treated as a heat bath.