2018 Impact factor 2.481
Hadrons and Nuclei
Eur. Phys. J. A 17, 195-212 (2003)
DOI: 10.1140/epja/i2003-10007-5

Emission of intermediate-mass fragments in the interaction of $\chem{^{16}O}$ with $\chem{^{59}Co}$, $\chem{^{93}Nb}$ and $\chem{^{197}Au}$

E. Gadioli1, G.F. Steyn2, F. Albertini1, C. Birattari1, M. Cavinato1, S.H. Connell3, A.A. Cowley4, E. Fabrici1, S.V. Förtsch2, E. Gadioli Erba1, J.J. Lawrie2, M. Pigni1, J.P.F. Sellschop3 and E. Sideras Haddad3

1  Università di Milano and I.N.F.N., Sezione di Milano, Milano, Italy
2  iThemba Laboratory for Accelerator-Based Sciences, Somerset West 7129, South Africa
3  Schonland Research Centre, Witwatersrand University, Johannesburg, South Africa
4  Department of Physics, University of Stellenbosch, Matieland 7602, South Africa

gadioli@mi.infn.it

(Received: 21 January 2003 / Revised version: 10 March 2003 / Published online: 5 June 2003)

Abstract
In this paper we study the emission of $\chem{^{8}Be_{\rm gs}}$, B and N fragments in the interaction of $\chem{^{16}O}$ ions with $\chem{^{59}Co}$, $\chem{^{93}Nb}$ and $\chem{^{197}Au}$ at incident energies varying from 6 to 25 MeV/nucleon. The spectra of these fragments, as well as those of C fragments studied in a previous paper, are dominated at forward angles by a component originating from break-up of $\chem{^{16}O}$. At the higher incident energies break-up occurs after quite a sizeable projectile energy loss. Another mechanism which dominates at large emission angles, favours the emission of low-energy fragments and is attributed to the coalescence of nucleons during the cascade of nucleon-nucleon interactions by means of which the excited nuclei produced in the primary two-ion interaction thermalize.

PACS
25.70.Gh - Compound nucleus.
25.70.Mn - Projectile and target fragmentation.

© Società Italiana di Fisica, Springer-Verlag 2003