arxiv: 0903.1772 · v1 · submitted 2009-03-10 · ⚛️ nucl-ex

Isotopic Dependence of the Nuclear Caloric Curve

The ALADIN2000 Collaboration: C. Sfienti , P. Adrich , T. Aumann , C.O. Bacri , T. Barczyk , R. Bassini , S. Bianchin , C. Boiano

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A.S. Botvina A. Boudard J. Brzychczyk A. Chbihi J. Cibor B. Czech M. De Napoli J.-E. Ducret H. Emling J.D. Frankland M. Hellstroem D. Henzlova G. Imme I. Iori H. Johansson K. Kezzar A. Lafriakh A. Le Fevre E. Le Gentil Y. Leifels J. Luehning J. Lukasik W.G. Lynch U. Lynen Z. Majka M. Mocko W.F.J. Mueller A. Mykulyak H. Orth A.N. Otte R. Palit P. Pawlowski A. Pullia G. Raciti E. Rapisarda H. Sann C. Schwarz H. Simon K. Suemmerer W. Trautmann M.B. Tsang G. Verde C. Volant M. Wallace H. Weick J. Wiechula A. Wieloch B. Zwieglinski

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keywords beendependenceisotopicaladinappearapproxbeambeams

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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. Small Coulomb effects (\Delta T \approx 0.6 MeV) appear for residue production near the onset of multifragmentation.

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Isotopic Dependence of the Nuclear Caloric Curve

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