International Conference on Nuclear Data for Science and Technology 2007
DOI: 10.1051/ndata:07328

Coincidence measurement of the reaction ⁵⁶Fe+p at 1 GeV per nucleon with SPALADIN

J.-É. Ducret¹, É. Le Gentil¹, T. Aumann², C.-O. Bacri³, J. Benlliure⁴, S. Bianchin², M. Böhmer⁵, A. Boudard¹, E. Casarejos⁴, L. Donadille^{1, 6}, M. Fernandez-Ordoñez⁴, R. Gernhäuser⁵, H. Johansson², K. Kezzar¹, T. Kurtukian-Nieto⁴, A. Lafriakh¹, F. Lavaud^{1, 7}, A. Le Fèvre², S. Leray¹, J. Lühning², J. Lukasik², U. Lynen², W.F.J. Müller², S. Pietri^{1, 8}, F. Rejmund⁹, C. Schwarz², C. Sfienti², H. Simon², W. Trautmann², C. Volant¹ and O. Yordanov<sup>2

1</sup>  Service de Physique Nucléaire, DSM/DAPNIA, CEA Saclay, 91191 Gif-sur-Yvette, France
²  GSI, Planckstraße 1, 64291 Darmstadt, Germany
³  Institut de Physique Nucléaire d'Orsay, CNRS/IN2P3, 91406 Orsay, France
⁴  Physics Department, Universidad de Santiago de Compostela, 15706 Santiago de Compostela, Spain
⁵  Teschnische Universität München, Physik Department E12, 85748 Garching, Germany
⁶  IRSN/LDRI, 77 avenue du Général de Gaulle, 92140 Clamart, France
⁷  EDF R&D/SINETICS, 1 avenue du Général de Gaulle, 92141 Clamart, France
⁸  Departement of Physics, University of Surrey, Guildford, GU2 7XH Surrey, UK
⁹  GANIL, CEA & CNRS/IN2P3, BP. 5027, 14076 Caen, France

jean-eric.ducret@cea.fr

Published online: 21 May 2008

Abstract
The SPALADIN experiment using the inverse-kinematics technique where the heavy-ion beam is sent onto a liquid-hydrogen target has been carried out at GSI (Darmstadt, Germany) in order to study the spallation of ⁵⁶Fe. On an event-by-event basis, spallation residues, light-charged fragments and neutrons have been detected in coincidence. The set-up is based on a large aperture magnet (ALADiN) equipped with a time-projection chamber (TPC), a hodoscope and a high-efficiency neutron detector. The combination of the inverse kinematics and of the acceptance of the set-up focuses the measurement on the low centre-of-mass energy fragments of the reaction essentially originating from the de-excitation of the prefragment formed at the end of the intranuclear cascade. Data taken at 1 GeV per nucleon have been analysed. Preliminary results on coincidence observables are shown and compared to theoretical calculations. We emphasize on the identification of different types of multi-fragment final states which correspond to different decay channels and allow to probe different decay mechanisms.

© CEA 2008