Continuum damping effects in nuclear collisions associated with twisted boundary conditions
Abstract
The time-dependent Skyrme Hartree-Fock calculations have been performed to study 24Mg +24Mg collisions. The twisted boundary conditions, which can avoid finite box-size effects of the employed 3D coordinate space, have been implemented. The prolate deformed 24Mg has been set to different orientations to study vibrations and rotations of the compound nucleus 48Cr. Our time evolution results show continuum damping effects associated with the twist-averaged boundary condition play a persistent role after the fusion stage. In particular, a rotational damping in continuum is presented in calculations of both twist-averaged and absorbing boundary conditions, in which damping widths can be clearly extracted. It is unusual that the rotating compound nucleus in continuum evolves towards spherical but still has a considerable angular momentum.
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