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

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ID: 273309
2001
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Abstract
The relation between excitation energy and reaction observables has been examined for $(6.0--14.6)\ensuremath{-}\mathrm{GeV}/c$ protons, (5.0--9.2)-GeV ${\ensuremath{\pi}}^{\ensuremath{-}},$ and $8.0\ensuremath{-}\mathrm{GeV}/c$ antiprotons incident on a ${}^{197}\mathrm{Au}$ target. Relative to proton and ${\ensuremath{\pi}}^{\ensuremath{-}}$ beams, $8.0\ensuremath{-}\mathrm{GeV}/c$ antiprotons are found to be the most effective projectile for depositing high excitation energies in the targetlike residue. For protons and ${\ensuremath{\pi}}^{\ensuremath{-}}$ the excitation-energy distributions are nearly identical and appear to be independent of beam momentum above $6--8\mathrm{GeV}/c.$ 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 ${E}^{*}/A\ensuremath{\approx}4--6\mathrm{MeV}.$ These experimental signals are consistent with a multifragmentation mechanism that becomes the dominant deexcitation mode above in the range ${E}^{*}/A\ensuremath{\sim}4--6\mathrm{MeV}.$
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2001physicalthermal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors
Journal physical review c
Year 2001
DOI
doi:10.1103/PhysRevC.64.064604
URL
https://doi.org/10.1103/physrevc.64.064604
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