Isotope Ratios of Light Fragments as Thermometers in Heavy Ion Collisions

Authors: T. Möhlenkamp, M. Begemann-Blaich, Th. Blaich, C. Groß, H. Emling, A. Ferrero, G. Imme, I. Iori, G.J. Kunde, W.D. Kunze, V. Lindenstruth, U. Lynen, A. Moroni, W.F.J. Müller, B. Ocker, J. Pochodzalla, G. Raciti, T. Rubehn, H. Sann, A. Schüttauf, C. Schwarz, W. Seidel, V. Serfling, J. Stroth, W. Trautmann, A. Trzcinski, A. Tucholski, G. Verde, A. Wörner, E. Zude, B. Zwieglinski
Published: Proceedings of the 33rd International Winter Meeting On Nuclear Physics, 23-28 Jan 1995, Bormio, Italy
    edited by I. Iori and A. Moroni (Ricerca Scientifica ed Educazione Permanente, Milano, 1995), p 383
Abstract: Fragment distributions resulting from Au+Au collisions at an incident energy of E/A=600 MeV are studied. A temperature scale was derived from observed yield ratios of He and Li isotopes. The relation between this isotope temperature and the excitation energy of the system exhibits a behavior which is expected for a phase transition. The nuclear vapor regime takes over at an excitation energy of 10 MeV per nucleon, a temperature of 5 MeV and may be characterized by a density of 0.15-0.3 normal nuclear density.
Paper: Postscript 11 pages with 5 embedded figure
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