Emission temperatures and freeze out densities from light particle correlation functions in Au+Au collisions at 1 A GeV

Authors: S. Fritz et al.
Published: Proceedings of the 35th International Winter Meeting on Nuclear Physics, Bormio, Italy, January 26 - February 1, 1997
    edited by I. Iori and A. Moroni (Ricerca Scientifica ed Educazione Permanente, Milano, 1997)
Preprint: nucl-ex/9704002
Abstract: A study of emission temperatures extracted from excited state populations and of freeze out radii from light particle intensity interferometry is presented. Three high resolution dE-E-Hodoscopes with a total of 216 detectors are combined with the ALADiN setup in order to study Au+Au collisions at 1 A GeV. In contrast to measurements with the isotope thermometer the extracted apparent temperatures do not vary with impact parameter thus with excitation energy. From the extracted radii a freeze out density was determined which decreases from 0.2 ρ for the most peripheral to less than 0.1 ρ for the most central collisions. A density-dependent feeding correction is applied to the different temperature measurements.
Paper: Postscript 13 pages with 9 embedded figures
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Figures: Fig. 1, 2, 3, 4, 5, 6, 7, 8, 9
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