A hot expanding source in 50 A MeV Xe + Sn central reactions

N Marie,E De Filippo,T Reposeur,G Auger,P Ecomard,J.C Steckmeyer,E Plagnol,D Gourio,J Benlliure,S Salou,C Volant,J.F Lecolley,A Chbihi,M Louvel,R Brou,B Tamain,B Borderie,E Bisquer,M Squalli,A Rahmani,P Lautesse,L Nalpas,J.L Laville,D Doré,T Lefort,J Colin,R Dayras,D Guinet,A Demeyer,D Cussol,E Vient,A Ouatizerga,R Bougault,C.o Bacri ,M Pârlog ,R Légrain ,J L Charvet ,F Saint‐Laurent ,J Péter,L Tassan‐Got ,A Le Févre ,O Lopez,D Durand,J P Wieleczko ,E Rosato,P Eudes,Richard Laforest ,M F Rivet ,Vincent Métivier

doi:10.1016/s0370-2693(96)01446-3

Abstract

The INDRA multidetector has been used to study multifragmentation processes in central collisions for the Xe + Sn reaction at 50 A MeV. A single isotropic source formed at an excitation energy of 12 A MeV exhausting most of the emitted charged products has been isolated in such collisions. The fragment kinetic energy spectra indicate a fast disintegration of the system with a radial collective motion of about 2 A MeV. The light charged particle characteristics within this scenario are also discussed.

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