Isotopically resolved residues from the fragmentation of projectiles with largely different N/Z - the isospin-thermometer method

D. Henzlova , L. Audouin (1) , J. Benlliure , A.S. Botvina , A. Boudard , E. Casarejos , J.E. Ducret , T. Enqvist , L. Tassan-Got (1) , A. Heinz , V. Henzl , A. Junghans , B. Jurado (2) , A. Kelic , A. Krasa , T. Kurtukian Nieto , S. Leray , P. Napolitani (1, 3) , M.F. Ordonez , J. Pereira , R. Pleskac , F. Rejmund (4) , M.V. Ricciardi , K.-H. Schmidt , Ch. Schmitt , C. Stephan (1) , C. Villagrasa , C. Volant , A. Wagnerg , O. Yordanova

1 IPNO - Institut de Physique Nucléaire d'Orsay
2 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
3 GSI - Helmholtz zentrum für Schwerionenforschung GmbH
4 GANIL - Grand Accélérateur National d'Ions Lourds

The mean N-over-Z (/Z) ratio of residues produced in the fragmentation of 136Xe (N/Z=1.519), 124Xe (N/Z=1.296) in comparison with 56Fe (N/Z=1.154) is investigated over the full range of Z. The final residues from the 136Xe projectile keep a memory on the initial N/Z. The idea to trace back the excitation energy of the fragment entering evaporation via direct exploration of the N/Z evolution in the evaporation process is investigated and applied to the data. The freeze-out temperature is deduced, which is consistent with the investigations of light and intermediate-mass fragments (IMF) in other experiments.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

D. Henzlova, L. Audouin, J. Benlliure, A.S. Botvina, A. Boudard, et al.. Isotopically resolved residues from the fragmentation of projectiles with largely different N/Z - the isospin-thermometer method. 18th Nuclear Physics Division Conference of the EPS Phase transitions in strongly interacting matter, Aug 2004, Prague, Czech Republic. pp.110-113, ⟨10.1016/j.nuclphysa.2004.12.016⟩. ⟨in2p3-00023923⟩