Isotopic Dependence of the Caloric Curve
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
Cite
@article{arxiv.0907.1196,
title = {Isotopic Dependence of the Caloric Curve},
author = {The ALADIN2000 Collaboration and W. Trautmann and P. Adrich and T. Aumann and C. O. Bacri and T. Barczyk and R. Bassini and S. Bianchin and C. Boiano and A. S. Botvina and A. Boudard and J. Brzychczyk and A. Chbihi and J. Cibor and B. Czech and M. De Napoli and J. -E. Ducret and H. Emling and J. D. Frankland and M. Hellstroem and D. Henzlova and G. Imme and I. Iori and H. Johansson and K. Kezzar and A. Lafriakh and A. Le Fevre and E. Le Gentil and Y. Leifels and J. Luehning and J. Lukasik and W. G. Lynch and U. Lynen and Z. Majka and M. Mocko and W. F. J. Mueller and A. Mykulyak and H. Orth and A. N. Otte and R. Palit and P. Pawlowski and A. Pullia and G. Raciti and E. Rapisarda and H. Sann and C. Schwarz and C. Sfienti and H. Simon and K. Suemmerer and M. B. Tsang and G. Verde and C. Volant and M. Wallace and H. Weick and J. Wiechula and A. Wieloch and B. Zwieglinski},
journal= {arXiv preprint arXiv:0907.1196},
year = {2010}
}
Comments
7 pages, 4 figures, contribution to proceedings of International School of Nuclear Physics, 30th Course, Heavy-Ion Collisions from the Coulomb Barrier to the Quark-Gluon Plasma, Erice-Sicily: 16 - 24 September 2008