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20 April 2024

» pubmed » pmid14995843

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Azimuthal dependence of collective expansion for symmetric heavy-ion collisions
G Stoicea ; M Petrovici ; A Andronic ; N Herrmann ; J P Alard ; Z Basrak ; V Barret ; N Bastid ; R Caplar ; P Crochet ; P Dupieux ; M Dzelalija ; Z Fodor ; O Hartmann ; K D Hildenbr ; B Hong ; J Kecskemeti ; Y J Kim ; M Kirejczyk ; M Korolija ; R Kotte ; T Kress ; A Lebedev ; Y Leifels ; X Lopez ; M Merschmeier ; W Neubert ; D Pelte ; F Rami ; W Reisdorf ; D Schüll ; Z Seres ; B Sikora ; K S Sim ; V Simion ; K Siwek-Wilczy?ska ; V Smolyankin ; M Stockmeier ; K Wi?niewski ; D Wohlfarth ; I Yushmanov ; A Zhilin ; P Danielewicz ; ;
Date:	20 Feb 2004
Journal:	Phys Rev Lett, 92 (7), 072303
Abstract:	Detailed studies of the azimuthal dependence of the mean fragment and flow energies in the Au+Au and Xe+CsI systems are reported as a function of incident energy and centrality. Comparisons between data and model calculations show that the flow energy values along different azimuthal directions could be viewed as snapshots of the fireball expansion with different exposure times. For the same number of participating nucleons more transversally elongated participant shapes from the heavier system produce less collective transverse energy. Good agreement with Boltzmann-Uehling-Uhlenbeck calculations is obtained for a soft nuclear equation of state.
Source:	PubMed, pmid14995843
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