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Density determinations in heavy ion collisions

G. Röpke1,*, S. Shlomo2, A. Bonasera2,3, J. B. Natowitz2, S. J. Yennello2, A. B. McIntosh2, J. Mabiala2, L. Qin2, S. Kowalski2 et al.

K. Hagel2, M. Barbui2, K. Schmidt2, G. Giulani2, H. Zheng2, and S. Wuenschel2

  • 1Institut für Physik, Universität Rostock, Universitätsplatz 3, D-18055 Rostock, Germany
  • 2Cyclotron Institute, Texas A & M University, College Station, Texas, 77843, USA
  • 3Laboratorio Nazionale del Sud-INFN, via S. Sofia 64, 95123 Catania, Italy

  • *gerd.roepke@uni-rostock.de
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Phys. Rev. C 88, 024609 – Published 14 August, 2013

DOI: https://doi.org/10.1103/PhysRevC.88.024609

Abstract

The experimental determination of freeze-out temperatures and densities from the yields of light elements emitted in heavy ion collisions is discussed. Results from different experimental approaches are compared with those of model calculations carried out with and without the inclusion of medium effects, which become of relevance for baryon densities above ≈5×10−4 fm−3. A quantum statistical (QS) model incorporating medium effects is in good agreement with the experimentally derived results at higher densities. A densitometer based on medium modified chemical equilibrium constants is proposed.

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Phys. Rev. C 88, 024609– Published 14 August, 2013
  • Received 3 June 2013

©2013 American Physical Society

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