Faculty of Physics - University of Bucharest

UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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Conference: Bucharest University Faculty of Physics 2004 Meeting

Section: Nuclear and Elementary Particles Physics

Title:

On the nuclear fragmentation mechanisms in nuclear collisions at intermediate and high energies

Authors:

Al. Jipa, C. Besliu, D. Felea, B. Iliescu, O. Ristea, C. Ristea, M. Calin, A. Horbuniev, I. Arsene, T. Esanu, S. Ochesanu, C. Caramarcu, C. Bordeianu, I. Rosu, V. Grossu, I.S. Zgura, E. Stan, C. Mitu, M. Potlog, M. Cherciu, I. Stefan

Affiliation:

Atomic and Nuclear Physics Department, Faculty of Physics, University of Bucharest, ROMANIA

E-mail

Keywords:

Nuclear fragmentation mechanism

Abstract:

The nuclear fragmentation mechanisms can be discussed taking into account different scales. These scales are related to the fragment sizes. Taking into account the possible different fragmentation mechanisms of the nuclei at the same incident energy an analysis of the experimental results obtained in different experiments performed at the JINR Dubna (Russi), KEK Tsukuba (Japan), GSI Darmstadt (Germany) is done. Results on apparent temperatures, angular distributions, fragment momentum spectra, multiplicities of the intermediate mass fragments are used to analyse the competition between two possible nuclear fragmentation mechanisms, namely: a sudden fragmentation by explosive mechanisms, like shock waves, and a slow fragmentation by the "fission" of the spectator regions, mainly, because of the interactions with the particles or fragments emitted from the participant region at transverse angles on the incident nucleus, in CMS. Some connections with chaos dynamics and fractal structure of the fragmentation patterns are included.