Isospin influence on the decay modes of systems produced in the 78,86Kr+40,48Ca reactions at 10AMeV
B. Gnoffo2, S. Pirrone2, G. Politi1,2, M. La Commara3,4, J.P. Wieleczko5, E. De Filippo2, P. Russotto1,2, M. Vigilante3,4, G. Ademard11, F. Amorini6, L. Auditore7,8, C. Beck9, I. Berceanu10, E. Bonnet5, B. Borderie11, G. Cardella2, A. Chibihi5, M. Colonna6, A. D’Onofrio4,12, J. D. Frankland5, E. Geraci1,2, E. Henry13, E. La Guidara1,14, G. Lanzalone15,6, P. Lautesse16, D. Lebhertz5, N. Le Neindre17, I. Lombardo3, K. Mazurek5, A. Pagano2, M. Papa2, E. Piasecki18, F. Porto1,6, M. Quinlann13, F. Rizzo1,6, E. Rosato3,4,†, W. U. Schroeder13, G. Spadaccini3,4, A. Trifirò7,8, J. Toke13, M. Trimarchi7,8, G. Verde2.
1Dipartimento di Fisica e Astronomia, Università di Catania, Italy
2INFN Sezione di Catania, Italy
3Dipartimento di Fisica, Università Federico II Napoli, Italy
4INFN Sezione di Napoli, Italy
5GANIL Caen,France
6INFN Laboratori Nazionali del Sud, Italy
7 Dipartimento di Fisica, Università di Messina, Italy
8INFN Gruppo collegato di Messina, Italy
9IN2P3 - IPHC Strasbourg, France
10IPNE, Bucharest, Romania
11IN2P3 - IPN Orsay, France
12Dipartimento di Matematica e Fisica - Seconda Università di Napoli,Caserta, Italy
13University of Rochester, USA
14Centro Siciliano Fisica Nucleare e Struttura della Materia, Catania, Italy
15Università Kore, Enna, Italy
16IN2P3 - IPN Lyon, France
17IN2P3 - LPC Caen, France
18University of Warsaw, Poland
19INFN Laboratori Nazionali di Legnaro, Italy
† deceased
The results of the analysis of the experimental data of the collisions 78Kr+40Ca and 86Kr+48Ca at 10AMeV are presented. The experiment was performed at the INFN Laboratori Nazionali del Sud (LNS) in Catania with the beams delivered by the Superconductive Cyclotron and the 4π multidetector CHIMERA.
The composite systems formed in these reactions are different for 16 neutrons, the maximum value possible with stable beams for these systems; the various disintegration paths and in particular the isospin effects on the decay modes of the two produced systems are studied. The neutron richness of the composite nucleus is in fact expected to play a crucial role in the competition between various de-excitation channels, thus providing information about fundamental nuclear quantities such as level density, fission barrier and viscosity.
With the purpose to investigate systems with an higher ratio N/Z, a LOI for the use of RIBs delivered by the facility SPES was presented: the reactions 88-94Kr + 40-48Ca at 10 AMeV will be studied for a comparison with the results obtained with stable beams.