Isospin Against Size Effects In Projectile Dynamical Fission For 112,124Sn+58,64Ni and 124Xe+64Zn Reactions At 35 A.MeV

International Symposium on Entrance Channel Effect on the Reaction Mechanism in Heavy Ion Collisions

Russotto, P.^1 ; Filippo, E. De^1 ; Pagano, A.^1 ; Piasecki, E.^2,3 ; Acosta, L.^4 ; Amorini, F.^4 ; Anzalone, A.^4 ; Auditore, L.^5 ; Baran, V.^6 ; Berceanu, I.^7 ; Boiano, C.^8 ; Borderie, B.^9 ; Bruno, M.^10 ; Cap, T.^11 ; Cardella, G.^1 ; Castoldi, A.^8,12 ; Cavallaro, S.^4,13 ; Chatterjee, M.B.^14 ; Chbihi, A.^15 ; Colonna, M.^4 ; D'Agostino, M.^10 ; D'Andrea, M.^1 ; Toro, M Di^4,13 ; Fichera, F.^1 ; Francalanza, L.^4,13 ; Geraci, E.^1,13 ; Gianì, R.^4,13 ; Gnoffo, B.^13 ; Grimaldi, A.^1 ; Grzeszczuk, A.^16 ; Guazzoni, C.^8,12 ; Guazzoni, P.^8,17 ; Giudice, N.^1 ; Kowalski, S.^16 ; Guidara, E La^1 ; Lanzalone, G.^4,18 ; Lanzanò, G.^1,23 ; Lombardo, I.^19,20 ; Maiolino, C.^4 ; Marquínez-Durán, G.^21 ; Minniti, T.^13 ; Papa, M.^1 ; Pagano, E.V.^4,13 ; Passaro, G.^4 ; Pirrone, S.^1 ; Planeta, R.^22 ; Politi, G.^1,13 ; Porto, F.^4,13 ; Quattrocchi, L.^5 ; Rivet, M.F.^9 ; Rosato, E.^19,20 ; Riccio, F.^8,12 ; Rizzo, F.^4,13 ; Saccà, G.^1 ; Schmidt, K.^16 ; Siwek-Wilczyn´ska, K.^11 ; Skwira-Chalot, I.^11 ; Trifirò, A.^5 ; Trimarchi, M.^5 ; Verde, G.^1 ; Vigilante, M.^19,20 ; Wieleczko, J.P.^15 ; Wilczyn´ski, J.^23 ; Zambon, P.^8,12 ; Zetta, L.^8,17 ; Zipper, W.^16

INFN-Sezione di Catania, Catania, Italy^1

Heavy Ion Laboratory, University of Warsaw, Warsaw, Poland^2

A. Soltan Institute for Nuclear Studies, S´wierk/Warsaw, Poland^3

INFN-Laboratori Nazionali Del Sud, Catania, Italy^4

Dip. di Fisica e Scienze della Terra, INFN, University di Messina, Italy^5

Physics Faculty, University of Bucharest, Romania^6

National Institute of Physics and Nuclear Engineering Horia Hulubei, Bucharest, Romania^7

INFN, Sezione di Milano, Milan, Italy^8

Institut de Physique Nuckéaire, CNRS/IN2P3, Université Paris-Sud 11, Orsay, France

(10) Dip. di Fisica, INFN, University di Bologna, Italy

(11) Faculty of Physics, University of Warsaw, Warsaw, Poland

(12) Dip. Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Milan, Italy

(13) Dip. di Fisica e Astronomia, University di Catania, Catania, Italy

(14) Saha Institute of Nuclear Physics, Kolkata, India

(15) GANIL (DSM-CEA/CNRS/IN2P3), Caen, France

(16) Institute of Physics, University of Silesia, Katowice, Poland

(17) Dipartimento di Fisica, University di Milano, Milan, Italy

(18) Kore Universita, Enna, Italy

(19) Dip. di Fisica-University di Napoli Federico II, Compl. Un. Monte S.Angelo Ed., 6 Via Cinthia, 80126 Napoli, Italy

(20) INFN-Sez. di Napoli, Compl. Un. Monte S.Angelo Ed., 6 Via Cinthia, 80126 Napoli, Italy

(21) Departamento de Física Aplicada, Universidad de Huelva, E-21071 Huelva, Spain

(22) M. Smoluchowski Institute of Physics, Jagellonian University, Cracow, Poland

(23) National Centre for Nuclear Research, Otwock-Swierk, Poland^9

关键词: Beam energies;    Different mass;    Dynamical effects;    Fission process;    Isospin;    Multi-detectors;    Quantitative comparison;    Size effects;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/515/1/012020/pdf
DOI  :  10.1088/1742-6596/515/1/012020

来源: IOP

【 摘 要 】

In past experiments, mass asymmetric projectile-target combinations124Sn+64Ni and112Sn+58Ni were investigated at ELab(112'124Sn)=35 A.MeVbeam energybyusing the 4n multi-detector CHIMERA. From a quantitative comparison of cross sections associated to Statistical and Dynamical Fission of the Projectile-Like Fragments, it resulted that Dynamical Fission process is about two times more probable in the neutron rich124Sn+64Ni system than in the112Sn +58Ni neutron poor one. In contrast, no sizable difference was found for Statistical Fission mechanism. The observed difference in the strength of the Dynamical effects could arise from the difference in entrance channel Isospin (N/Z) content. In order to disentangle Isospin effects from effects due to the different masses of the two systems, a new experiment124Xe+64Zn at 35 A.MeV beam energy has been recently carried out.