Clustering in light nuclei and their effects on fusion and pre-equilibrium processes

Main Article Content

Fabiana Gramegna
Magda Cicerchia
Tommaso Marchi
Marco Cinausero
Daniela Fabris
Giorgia Mantovani
Gianmaria Collazuol
Daniele Mengoni
Meltem Degerlier
Luca Morelli
Mauro Bruno
Michela D’Agostino
Sandro Barlini
Maurizio Bini
Alberto Camaiani
Gabriele Pasquali
Silvia Piantelli
Giovanni Casini
Giuseppe Pastore
Diego Gruyer
Pietro Ottanelli
Simone Valdrè
Nicla Gelli
Alessandro Olmi
Giacomo Poggi
Ivano Lombardo
Daniele Dell’aquila
Silvia Leoni
Natalja Cieplicka-Orynczak
Bogdan Fornal
Maria Colonna
Akira Ono

Abstract

The study of heavy ion nuclear reactionis an important tool to observe and disentangle different and competing mechanisms, which may arise in the different energy regimes. In particular, at relatively low bombarding energy, it is quite interesting the comparison between pre-equilibrium and thermal emission of light charged particles from hot nuclear systems [1-6]. Indeed, the nuclear structure of the interacting partners can be strongly correlated to the dynamics, especially at energies close to the Coulomb barrier, and this effect emerges when some nucleons or clusters of nucleons are either emitted or captured. In particular, a major attention has been devoted, in the last years, to the possible observation of cluster structure effects in the competing nuclear reaction mechanisms, especially when fast processes are involved. At this purpose, the four reactions 16O+30Si at 111 MeV, 16O+30Si at 128 MeV, 18O+28Si at 126 MeV, 19F+27Al at 133 MeV have been measured to study the onset of pre-equilibrium in an energy range where, for central collisions, complete fusion is expected to be the predominant mode. Experimental data were collected using the GARFIELD + RCo array [7], fully equipped with digital electronics at the LegnaroNational Laboratories. The comparison between experimental data and different model predictions have been performed: in particular, both dynamical models based either on Stochastic Mean Field (TWINGO) or Anti-symmetrized Molecular Dynamics and fully statistical models (GEMINI++) have been considered. Simulated events are filtered through a software replica of the apparatus, to take into account all possible distortions of the experimental distributions due to the finite size of the apparatus.

Article Details

How to Cite
Gramegna, F., Cicerchia, M., Marchi, T., Cinausero, M., Fabris, D., Mantovani, G., Collazuol, G., Mengoni, D., Degerlier, M., Morelli, L., Bruno, M., D’Agostino, M., Barlini, S., Bini, M., Camaiani, A., Pasquali, G., Piantelli, S., Casini, G., Pastore, G., Gruyer, D., Ottanelli, P., Valdrè, S., Gelli, N., Olmi, A., Poggi, G., Lombardo, I., Dell’aquila, D., Leoni, S., Cieplicka-Orynczak, N., Fornal, B., Colonna, M., & Ono, A. (2019). Clustering in light nuclei and their effects on fusion and pre-equilibrium processes. Nucleus, (63), 12-18. Retrieved from http://nucleus.cubaenergia.cu/index.php/nucleus/article/view/639
Section
Ciencias Nucleares

References

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