Author/Authors :
Trautmann، نويسنده , , W. and Adrich، نويسنده , , P. and Aumann، نويسنده , , T. and Bacri، نويسنده , , C.O. and Barczyk، نويسنده , , T. and Bassini، نويسنده , , Sibele R. and Bianchin، نويسنده , , S. and Boiano، نويسنده , , C. and Botvina، نويسنده , , A.S. and Boudard، نويسنده , , A. and Brzychczyk، نويسنده , , J. and Chbihi، نويسنده , , A. and Cibor، نويسنده , , J. and Czech، نويسنده , , B. and De Napoli، نويسنده , , M. and Ducret، نويسنده , , J.-E.، نويسنده ,
Abstract :
Isotopic effects in projectile fragmentation at relativistic energies have been studied with the ALADIN forward spectrometer at SIS. Stable and radioactive Sn and La beams with an incident energy of 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 ratio of the produced spectator sources, consistent with predictions for expanded systems. Consequences for the proposed interpretation of chemical breakup temperatures as representing the limiting temperatures predicted by microscopic models are discussed.
Keywords :
Multifragmentation , Nuclear caloric curve , Projectile fragmentation , Radioactive beams , Isotope temperature , Isotopic effects , Limiting temperature , Microscopic models
