Strong enhancement of extremely energetic proton production in central heavy ion collisions at intermediate energy
P. Sapienza, R. Coniglione, M. Colonna, E. Migneco, C. Agodi, R. Alba, G. Bellia, A. Del Zoppo, P. Finocchiaro, V. Greco, K. Loukachine, C. Maiolino, P. Piattelli, D. Santonocito, P. G. Ventura, Y. Blumenfeld, M. Bruno, N. Colonna, M. D'Agostino, L. Fabbietti, M. L. Fiandri, F. Gramegna, I. Iori, G. V. Margagliotti, P. F. Mastinu, P. M. Milazzo, A. Moroni, R. Rui, J. A. Scarpaci, G. Vannini
Abstract
The energetic proton emission has been investigated as a function of the reaction centrality for the system 58Ni + 58Ni at 30A MeV. Extremely energetic protons (EpNN > 130 MeV) were measured and their multiplicity is found to increase almost quadratically with the number of participant nucleons thus indicating the onset of a mechanism beyond one and two-body dynamics.
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