DOI: 10.1140/epja/i2003-10007-5
Emission of intermediate-mass fragments in
the interaction of
with
,
and
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
, B and N fragments in
the interaction of
ions with
,
and
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
. 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.
25.70.Gh - Compound nucleus.
25.70.Mn - Projectile and target fragmentation.
© Società Italiana di Fisica, Springer-Verlag 2003
