Thermal excitation of heavy nuclei with 5-15 GeV/c antiproton, proton and pion beams

Details Thermal excitation of heavy nuclei with 5-15 GeV/c antiproton, proton and pion beams Thermal excitation of heavy nuclei with 5-15 GeV/c antiproton, proton and pion beams

1999-06-25

arxiv.org/abs/nucl-ex/9906012v2

Phys.Lett. B463 (1999) 159-167

Physics

Nuclear Physics

Nuclear Experiment

14 pages including 5 figures and 1 table. Accepted in Physics Letter B. also available at http://nuchem.iucf.indiana.edu/

Scientific paper

10.1016/S0370-2693(99)01016-3

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$\pi$ detector array. The maximum probability for producing high excitation-energy events is found for the antiproton beam relative to other hadrons, $^3$He and $\bar{p}$ 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 $\bar{p}$ 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 $\sim$ 6 MeV.

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