1. Dynamical versus statistical production of Intermediate Mass Fragments at Fermi Energies
- Author
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G. Lanzalone, E. De Filippo, N. S. Martorana, Luis Acosta, E. Piasecki, K. Siwek-Wilczyńska, Triestino Minniti, F. Porto, Giuseppe Verde, B. Gnoffo, Lucrezia Auditore, E. V. Pagano, S. Pirrone, S. De Luca, Elio Rosato, Angelo Pagano, G. Politi, E. Geraci, C. Maiolino, T. Cap, Ivano Lombardo, M. Trimarchi, Antonio Trifiro, L. Quattrocchi, G. Cardella, Michele Papa, S. Norella, F. Rizzo, P. Russotto, J. Wilczynski, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
- Subjects
Physics ,Nuclear reaction ,Nuclear and High Energy Physics ,010308 nuclear & particles physics ,Hadron ,Nuclear Theory ,Order (ring theory) ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,01 natural sciences ,Isospin ,0103 physical sciences ,Content (measure theory) ,Production (computer science) ,Neutron ,Atomic number ,Atomic physics ,010306 general physics ,Nuclear Experiment - Abstract
International audience; The emission probability of Intermediate Mass Fragments (IMFs) in non-central reactions has been investigated in collisions of heavy $^{124}\hbox {Xe}$ projectiles with the two different medium-mass targets of $^{64}\hbox {Ni}$ and $^{64}\hbox {Zn}$ at the laboratory energy of 35 A MeV. The two colliding systems differ only for the target atomic number Z and, consequently, for the isospin N/Z ratio. The probability of IMFs emission from the projectile-like fragment has been measured, showing an enhancement of the IMFs emission for the neutron rich $^{64}\hbox {Ni}$ target. Most of the observed projectile break-up yield is associated with the production of only one IMF, that is, a quasi-binary splitting of projectile in two fragments in a broad range of charge asymmetry. For the events with one IMF, the relative contributions of the dynamical and statistical emissions have been evaluated. We find an enhancement of dynamical break-up probability for the neutron rich target with respect to the neutron poor one. The analysis suggests influence of the target isospin in inducing the dynamical break-up of projectile-like fragments. The new data have been also compared with previous published results of $^{112,124}\hbox {Sn}$ + $^{58,64}\hbox {Ni}$ systems, in order to disentangle between isospin effects against system-size effects on the emission probability. The comparisons between previous and new data suggest that the dynamical break-up is determined by the N/Z content of both projectile and target; for the cases here investigated, the influence of the system size on the dynamical emission probability can be excluded.
- Published
- 2020
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