Strong enhancement of extremely energetic proton production in central
  heavy ion collisions at intermediate energy

A. Bonasera; A. Del Zoppo; A. Del Zoppo; A. Del Zoppo; A. Moroni; A. R. Wolf; C. Agodi; C. Gelbke; C. Maiolino; D. Miskowiec; D. Santonocito; E. Migneco; E. Migneco; E. Migneco; F. Gramegna; G. Bellia; G. Martinez; G. V. Margagliotti; G. Vannini; H. Fucks; H. Nifenecker; I. Iori; I. Iori; J. A. Scarpaci; J. H. G. van Pol; K. Loukachine; L. Fabbietti; M. Bruno; M. Colonna; M. D'Agostino; M. Germain; M. L. Fiandri; N. Colonna; P. F. Mastinu; P. Finocchiaro; P. G. Ventura; P. M. Milazzo; P. Piattelli; P. Piattelli; P. Sapienza; P. Sapienza; P. Sapienza; R. Alba; R. Alba; R. Coniglione; R. Coniglione; R. Rui; R. Wada; V. Greco; V. Greco; W. Bauer; W. Cassing; Y. Blumenfeld

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Strong enhancement of extremely energetic proton production in central heavy ion collisions at intermediate energy

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.Comment: 5 pages, 2 figures, submitted to Physical Review Letter

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