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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:14 |
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Conference: Bucharest University Faculty of Physics 2010 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Methods used in detecting intermittency transition to chaos for the “nuclear billiard”
Authors:
D. Felea (1), C.C. Bordeianu (2,3), I.V. Grossu (2), C. Besliu (2), Al. Jipa (2), A.A. Radu (1), C.M. Mitu (1), E. Stan (1)
Affiliation:
(1) Institute of Space Sciences, Laboratory of Space Research, Bucharest-Magurele, ROMANIA
(2) Faculty of Physics, University of Bucharest, Bucharest-Magurele, ROMANIA
(3)Technologic High School no. 1, Campulung Moldovenesc, Bucharest-Magurele, ROMANIA
E-mail
dfelea@spacescience.ro
Keywords:
intermittent behaviour, numerical simulations of nuclear chaotic systems
Abstract:
We analyze on a classical 2D version of the "nuclear billiard" the onset of chaotical behaviour in different dynamical states. The coupling between the single-particle and the collective degrees of freedom in the presence of dissipation is taken into account. The main result obtained consists in locating a phase alternation of periodical and chaotical dynamics in the monopole case of nuclear wall oscillation. The intermittency was thus shown to be a specific property for "nuclear billiards" defined by inelastic particle-wall collisions. We examine the order-to-chaos transition by performing several types of analysis including sensitive dependence on the initial conditions, single-particle phase space maps, fractal dimensions of Poincare maps, autocorrelation functions, configuration and kinetic energy spaces, power spectra, Shannon entropies, and Lyapunov exponents.
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