Institut de recherche sur les lois fondamentales de l'Univers

Direction de la recherche fondamentale

Résumé du preprint DAPNIA-07-88

DAPNIA-07-88
Coincidence measurement of residues and light particles in the reaction 56Fe+p at 1 GeV per nucleon with SPALADIN
E. Le Gentil, T. Aumann, C.O. Bacri, J. Benlliure, S. Bianchin, M. Böhmer, A. Boudard, J. Brzychczyk, E. Casarejos, M. Combet, L. Donadille, J.E. Ducret, M. Fernandez-Ordoñez, R. Gernhäuser, H. Johansson, K. Kezzar, T. Kurtukian-Nieto, A. Lafriakh, F. Lavaud, A. Le Fèvre, S. Leray, J. Lühning, J. Lukasik, U. Lynen, W.F. Müller, P. Pawlowski, S. Pietri, F. Rejmund, C. Schwarz, C. Sfienti, H. Simon, W. Trautmann, C. Volant, O. Yordanov
The spallation of $^{56}$Fe in collisions with hydrogen at 1 A GeV has been studied in inverse kinematics with the large-aperture setup SPALADIN at GSI. Coincidences of residues with low-center-of-mass kinetic energy light particles and fragments have been measured allowing the decomposition of the total reaction cross-section into the different possible de-excitation channels. Detailed information on the evolution of these de-excitation channels with excitation energy has also been obtained. The comparison of the data with predictions of several de-excitation models coupled to the INCL4 intra-nuclear cascade model shows that only GEMINI can reasonably account for the bulk of collected results, indicating that in a light system with no compression and little angular momentum, multifragmentation might not be necessary to explain the data.

DAPNIA-07-88

Coincidence measurement of residues and light particles in the reaction 56Fe+p at 1 GeV per nucleon with SPALADIN

E. Le Gentil, T. Aumann, C.O. Bacri, J. Benlliure, S. Bianchin, M. Böhmer, A. Boudard, J. Brzychczyk, E. Casarejos, M. Combet, L. Donadille, J.E. Ducret, M. Fernandez-Ordoñez, R. Gernhäuser, H. Johansson, K. Kezzar, T. Kurtukian-Nieto, A. Lafriakh, F. Lavaud, A. Le Fèvre, S. Leray, J. Lühning, J. Lukasik, U. Lynen, W.F. Müller, P. Pawlowski, S. Pietri, F. Rejmund, C. Schwarz, C. Sfienti, H. Simon, W. Trautmann, C. Volant, O. Yordanov

  The spallation of $^{56}$Fe in collisions with hydrogen at 1 A GeV has been 
studied in inverse kinematics with the large-aperture setup SPALADIN at GSI. 
Coincidences of residues with low-center-of-mass kinetic energy light particles 
and fragments have been measured allowing the decomposition of the total reaction 
cross-section into the different possible de-excitation channels. Detailed information 
on the evolution of these de-excitation channels with excitation energy has also 
been obtained. The comparison of the data with predictions of several de-excitation 
models coupled to the INCL4 intra-nuclear cascade model shows that only GEMINI 
can reasonably account for the bulk of collected results, indicating that in a light 
system with no compression and little angular momentum, multifragmentation 
might not be necessary to explain the data.