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Wiechula, K. Kezzar, K. Suemmerer, M.B. Tsang, M. De Napoli, M. Hellstroem, M. Mocko, M. Wallace, P. Adrich, P. Pawlowski, R. Bassini, R. Palit, S. Bianchin, T. Aumann, T. Barczyk, The ALADIN2000 Collaboration: C. Sfienti, U. Lynen, W.F.J. Mueller, W.G. Lynch, W. Trautmann, Y. Leifels, Z. Majka","submitted_at":"2009-03-10T13:49:40Z","abstract_excerpt":"The A/Z dependence of projectile fragmentation at relativistic energies has been studied with the ALADIN forward spectrometer at SIS. A stable beam of 124Sn and radioactive beams of 124La and 107Sn at 600 MeV per nucleon have been used in order to explore a wide range of isotopic compositions. Chemical freeze-out temperatures are found to be nearly invariant with respect to the A/Z of the produced spectator sources, consistent with predictions for expanded systems. 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