Reaction dynamics studies for the system 7Be+58Ni

NUBA Conference Series -1: Nuclear Physics and Astrophysics

物理学;天文学

Torresi, D.^1,2 ; Mazzocco, M.^1,2 ; Acosta, L.^3 ; Boiano, A.^4 ; Boiano, C.^5 ; Diaz-Torres, A.^6 ; Fierro, N.^1 ; Glodariu, T.^7 ; Grilj, L.^3 ; Guglielmetti, A.^5,8 ; Keeley, N.^9 ; La Commara, M.^4,10 ; Martel, I.^3 ; Mazzocchi, C.^11 ; Molini, P.^1,2 ; Pakou, A.^12 ; Parascandolo, C.^1,2 ; Parkar, V.V.^3 ; Patronis, N.^12 ; Pierroutsakou, D.^4 ; Romoli, M.^4 ; Rusek, K.^13 ; Sanchez-Benitez, A.M.^3 ; Sandoli, M.^4,10 ; Signorini, C.^1,2 ; Silvestri, R.^4,10 ; Soramel, F.^1,2 ; Stiliaris, E.^14 ; Strano, E.^1,2 ; Stroe, L.^7 ; Zerva, K.^12

Dipartimento di Fisica e Astronomia, Universit'a di Padova, Italy^1

INFN, Sezione di Padova, Italy^2

Departamento de Física Aplicada, Universidad de Huelva, Spain^3

INFN, Sezione di Napoli, Italy^4

INFN, Sezione di Milano, Italy^5

ECT, Villazzano (TN), Italy^6

NIPNE, Magurele, Romania^7

Dipartimento di Fisica, Universit'a di Milano, Italy^8

Department of Nuclear Reactions, INS, Warszawa, Poland

(10) Dipartimento di Scienze Fisiche, Universit'a di Napoli, Italy

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

(12) Department of Physics, HINP, University of Ioannina, Greece

(13) Heavy Ion Laboratory, University of Warsaw, Warszawa, Poland

(14) Department of Physics, University of Athens, Greece^9

关键词: Production cross section;    Radioactive ion beams;    Reaction channels;    Reaction mechanism;    Semi-classical calculations;    Theoretical calculations;    Total reaction cross sections;    Weakly bound nucleus;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/590/1/012057/pdf
DOI  :  10.1088/1742-6596/590/1/012057

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

The study of reactions induced by exotic weakly bound nuclei at energies around the Coulomb barrier had attracted a large interest in the last decade, since the features of these nuclei can deeply affect the reaction dynamics. The discrimination between different reaction mechanisms is, in general, a rather difficult task. It can be achieved by using detector arrays covering high solid angle and with high granularity that allow to measure the reaction products and, possibly, coincidences between them, as, for example, recently done for stable weakly bound nuclei [1, 2]. We investigated the collision of the weakly bound nucleus7Be on a58Ni target at the beam energy of 1.1 times the Coulomb barrier, measuring the elastic scattering angular distribution and the energy and angular distributions of3He and4He. The7Be radioactive ion beam was produced by the facility EXOTIC at INFN-LNL with an energy of 22 MeV and an intensity of ∼3×105pps. Results showed that the4He yeld is about 4 times larger than3He yield, suggesting that reaction mechanisms other than the break-up mostly produce the He isotopes. Theoretical calculations for transfer channels and compound nucleus reactions suggest that complete fusion accounts for (41±5%) of the total reaction cross section extracted from optical model analysis of the elastic scattering data, and that3He and4He stripping are the most populated reaction channels among direct processes. Eventually estimation of incomplete fusion contributions to the3,4He production cross sections was performed through semi-classical calculations with the code PLATYPUS [3].