Emission time scale of light particles in the system Xe+Sn at 50 AMeV. A probe for dynamical emission?

D Gourio,D Ardouin,R Brou,P Ecomard,J Colin,M Squalli,E Pollaco,E Vient,D Guinet,C Donnet,A Demeyer,A Wieloch,G Auger,E De Filippo,J.C Steckmeyer,T Reposeur,A Rahmani,A Ouatizerga,B Berthier,M Louvel,B Borderie,R Dayras,P Lautesse,S Salou,N Le Neindre,N Bellaize,C Le Brun,A Chbihi,L Lebreton,R Bougault,J Benlliure,J.F Lecolley,E Bisquer,P Box,M Assenard,T Lefort,B Tamain,C Volant,E Plagnol,J.L Laville,L Nalpas,D Cussol,J L Charvet ,J P Wieleczko ,J Péter,F Saint‐Laurent ,N Marie,M Germain,R Régimbart,Vincent Métivier ,Dominique Durand ,A Lefèvre,M Pârlog ,L Tassan‐Got ,O Lopez,G Tăbăcaru ,A Benkirane,C.o Bacri ,R Légrain ,E Rosato,P Eudes,L Lakéhal-Ayat ,M F Rivet ,K Yuasa‐Nakagawa

doi:10.1007/pl00013604

Abstract

Proton and deuteron correlation functions have been investigated with both impact parameter and emission source selections. The correlations of the system (129Xe + natSn) at 50 AMeV have been measured with the 4 pi INDRA which provides a complete kinematical description of each event. The emission time scale analyzed with a quantum model reveals the time sequence of the light particles emitted by the projectile-like fragment. The short and constant emission time of the proton, independent of the impact parameter, can be attributed to a preequilibrium process.

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