Thermal excitation of heavy nuclei with 5–15 GeV/c antiproton, proton and pion beams
/ Authors
L. Beaulieu, K. Kwiatkowski, W. Hsi, T. Lefort, L. Pieńkowski, R. Korteling, G. Wang, B. Back, D. Bracken, H. Breuer
and 18 more authors
E. Cornell, F. Gimeno-Nogues, D. Ginger, S. Gushue, M. Huang, R. Laforest, W. G. Lynch, E. Martin, K. Morley, E. Ramakrishnan, L. Remsberg, D. Rowland, A. Ruangma, M. Tsang, V. Viola, E. Winchester, H. Xi, S. Yennello
/ Abstract
Abstract Excitation-energy distributions have been derived from measurements of 5.0–14.6 GeV/c antiproton, proton and pion reactions with 197 Au target nuclei, using the ISiS 4 π detector array. The maximum probability for producing high excitation-energy events is found for the 8 GeV/c antiproton beam relative to other hadrons, 3 He and p beams from LEAR. For protons and pions, the excitation-energy distributions are nearly independent of hadron type and beam momentum above about 8 GeV/c. The excitation energy enhancement for p beams and the saturation effect are qualitatively consistent with intranuclear cascade code predictions. For all systems studied, maximum cluster sizes are observed for residues with E ∗ /A∼6 MeV.
Journal: Physics Letters B