| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:57 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2009 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
The analysis of α-Cu nuclear collision at 4.5 A GeV/c, using a C# many-body code simulation
Authors:
C. Besliu (1), I. V. Grossu (1), Al. Jipa (1), C. C. Bordeianu (1), D. Felea (2)
Affiliation:
1 University of Bucharest, Faculty of Physics, Bucharest-Magurele, Romania
2 Institute of Space Sciences, Bucharest-Magurele, Romania
E-mail
ioan.grossu@brahms.fizica.unibuc.ro
Keywords:
many-body, simulation, chaos, nuclear collision
Abstract:
In a previous work, we presented an object oriented code simulation, developed in Microsoft C#, for the analysis of relativistic, three-dimensional, many-body systems. By using the inheritance and polymorphism mechanisms, we improved the application in order to easy apply it on any particular case of interest. An interaction retardation algorithm was added also.
We used the mentioned many-body engine for the study of α-Cu collision at 4.5 AGeV/c. The entire energy is used for thermalisation. Hence, the nucleons are initially placed in the vertexes of a centered Archimedean polyhedron, with radial velocities calculated (the rejection method) in agreement with the Fermi-Dirac distribution. For the bi-particle interaction we considered the Yukawa potential, together with a coulombian term.
We compared the simulation output with the experimental results obtained for the spectrum and the angular distribution of protons. The analysis of Lyapunov exponents indicates the high dependence on initial conditions, thus highlighting once again the importance of geometry in nuclear collisions at relativistic energies.
|
|
|
|