Study of quasi-projectile properties at Fermi energies in 48Ca projectile systems
arxiv(2024)
摘要
The emission of the pre-equilibrium particles during nuclear collisions at
moderate beam energies is still an open question. This influences the
properties of the compound nucleus but also changes the interpretation of the
quasi-fission process. A systematic analysis of the data obtained by the FAZIA
collaboration during a recent experiment with a neutron rich projectile is
presented. The full range of charged particles detected in the experiment is
within the limit of isotopic resolution of the FAZIA detector. Quasi-projectile
(QP) fragments were detected in majority thanks to the forward angular
acceptance of the experimental setup which was confirmed by introducing cuts
based on the HIPSE event generator calculations. The main goal was to compare
the experimental results with the HIPSE simulations after introducing these
cuts to investigate the influence of the n-rich entrance channel on the QP
fragment properties. More specifically, the lowering of N/Z of QP fragments
with beam energy was found to be present since the initial phase of the
reaction. Thus, pre-equilibrium emissions might be a possible candidate to
explain such an effect.
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