One-body dissipation and chaotic dynamics in a classical simulation of a nuclear gas

Details One-body dissipation and chaotic dynamics in a classical simulation of a nuclear gas One-body dissipation and chaotic dynamics in a classical simulation of a nuclear gas

1996-11-08

arxiv.org/abs/nucl-th/9611018v2

Phys.Rev.C58:2821-2830,1998

Physics

Nuclear Physics

Nuclear Theory

16 pages, 12 postscript figures included, revtex, new version completely revised accepted by Physical Review C and scheduled t

Scientific paper

10.1103/PhysRevC.58.2821

In order to understand the origin of one-body dissipation in nuclei, we analyze the behavior of a gas of classical particles moving in a two-dimensional cavity with nuclear dimensions. This "nuclear" billiard has multipole-deformed walls which undergo periodic shape oscillations. We demonstrate that a single particle Hamiltonian containing coupling terms between the particles' motion and the collective coordinate induces a chaotic dynamics for any multipolarity, independently on the geometry of the billiard. If the coupling terms are switched off the "wall formula" predictions are recovered. We discuss the dissipative behavior of the wall motion and its relation with the order-to-chaos transition in the dynamics of the microscopic degrees of freedom.

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