Thermal excitation-energy deposition in 5-15 GeV/c hadron-induced reactions with Au-197. II. Relation between excitation energy and reaction variables Academic Article uri icon


  • The relation between excitation energy and reaction observables has been examined for (6.0-14.6)-GeV/c protons, (5.0-9.2)-GeV -, and 8.0-GeV/c antiprotons incident on a 197Au target. Relative to proton and - beams, 8.0-GeV/c antiprotons are found to be the most effective projectile for depositing high excitation energies in the targetlike residue. For protons and - the excitation-energy distributions are nearly identical and appear to be independent of beam momentum above 6-8 GeV/c. It is found that total measured charge, total thermal energy, and total charged-particle multiplicity scale most directly with excitation energy, whereas IMF multiplicity and total transverse energy exhibit large fluctuations. Correlations of the observed fragment multiplicity, charge, and kinetic-energy distributions with excitation energy indicate a transition in the reaction observables near E*/A4-6 MeV. These experimental signals are consistent with a multifragmentation mechanism that becomes the dominant deexcitation mode above in the range E*/A 4-6 MeV.

published proceedings


author list (cited authors)

  • Beaulieu, L., Lefort, T., Kwiatkowski, K., Hsi, W. C., Wang, G., Bracken, D. S., ... Xi, H.

citation count

  • 29

complete list of authors

  • Beaulieu, L||Lefort, T||Kwiatkowski, K||Hsi, WC||Wang, G||Bracken, DS||Cornell, E||Ginger, DS||Morley, KB||Viola, WE||Gimeno-Nogues, F||Laforest, R||Martin, E||Ramakrishnan, E||Rowland, D||Ruangma, A||Winchester, E||Yennello, SJ||Korteling, RG||Pienkowski, L||Breuer, H||Back, B||Gushue, S||Remsberg, LR||Huang, MJ||Lynch, WG||Tsang, MB||Xi, H

publication date

  • November 2001