Abstract

Main features of fragments produced in 58Ni+40Ca and 58Ni+48Ca systems at 25 AMeV, collected by Chimera multidetector at INFN Laboratori Nazionali del Sud (Italy), are analysed in order to study properties of moderately excited systems (Ex=2-5 AMeV) formed in central collisions. By means of correlations between specific global variables, sensitive to the centrality of the collision, a stringent selection of Fusion-Evaporation residues, Multifragmentation sources and their decay products has been performed. The influence of the isospin contents of the systems on the reaction mechanism is carefully investigated and relevant observables such as isospin asymmetry N/Z or charge and mass of fragments, are discussed in order to probe the fragmentation path, characterised by short living ( ∼ 100fm/c) low density states of nuclear matter out of equilibrium. Preliminary comparisons with predictions of the BLOB model, in a semi-classical mean field framework, are presented, investigating cluster production emerging from the occurrence of low-density instabilities in central collisions.

Details

Title
Isospin Effect on fragment productions and reaction mechanisms for Ni+Ca systems at 25 AMeV
Author
Geraci, E 1 ; Cardella, G 2 ; Colonna, M 3 ; De Filippo, E 2 ; Gnoffo, B 1 ; Lanzalone, G 4 ; L Lo Monaco 5 ; Maiolino, C 3 ; Martorana, N S 6 ; Pagano, A 2 ; Pagano, E V 3 ; Papa, M 2 ; Pirrone, S 2 ; Politi, G 1 ; Russotto, P 3 ; Rizzo, F 6 ; Trifiró, A 7 ; Trimarchi, M 7 ; Barlini, S 8 ; Bougault, R 9 ; Bruno, M 10 ; Casini, G 8 ; M D’Agostino 10 ; Gramegna, F 11 ; N Le Neindre 9 ; Morelli, L 10 ; Piantelli, S 9 

 Dipartimento di Fisica e Astronomia “Ettore Majorana”, Università degli Studi di Catania - Catania, Italy; INFN, Sezione di Catania, Catania, Italy 
 INFN, Sezione di Catania, Catania, Italy 
 INFN, Laboratori Nazionali del Sud, Catania, Italy 
 Università degli Studi di Enna “Kore,” Enna, Italy 
 Dipartimento di Fisica e Astronomia “Ettore Majorana”, Università degli Studi di Catania - Catania, Italy 
 Dipartimento di Fisica e Astronomia “Ettore Majorana”, Università degli Studi di Catania - Catania, Italy; INFN, Laboratori Nazionali del Sud, Catania, Italy 
 Dipartimento di Scienze MIFT, Università degli Studi di Messina,Messina, Italy; INFN, Sezione di Catania, Catania, Italy 
 INFN, Sezione di Firenze and Università degli Studi di Firenze, Firenze, Italy 
 LPC Caen, ENSICAEN, University of Caen, CNRS/IN2P3, Caen France 
10  INFN, Sezione di Bologna and Università degli Studi di Bologna, Italy 
11  Laboratori Nazionali di Legnaro, INFN, Italy 
Publication year
2020
Publication date
Dec 2020
Publisher
IOP Publishing
ISSN
17426588
e-ISSN
17426596
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2571045371
Copyright
© 2020. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.