| Irfu-11-183
|
|---|
| Elusiveness of evidence for multifragmentation in 1-GeV proton-nucleus reactions |
| D. Mancusi, A. Boudard, J. Cugnon, J.-C. David, T. Gorbinet, S. Leray |
| We use the tools of hybrid intranuclear-cascade/nuclear-de-excitation models to evaluate the sensitivity of several physical observables to the inclusion of a multifragmentation stage in the de-excitation chain and assess the need for a multifragmentation model in the quantitative description of p+Fe56 and p+Xe136 reactions at 1-GeV incident energy. We seek clear signatures of multifragmentation by comparing different state-of-the-art de-excitation models coupled with intranuclear-cascade models and by focusing on discriminating observables such as correlations and fragment longitudinal-velocity distributions. None of the considered observables can be unambiguously interpreted as a multifragmentation footprint. The experimental data are best described as originating from sequential binary decays. However, no de-excitation model can reproduce the experimental longitudinal-velocity distributions from 1-GeV p+Xe136 |
