Collective motion in Ar+Pb collision at beam energies between 400 and 1800 MeV/nucleon

  • The energy dependence of rapidity distributions and flow effects was studied in central Ar+Pb collisions at 400, 800, and 1800 MeV/nucleon using a streamer chamber. Rapidity distributions for proton and pions are found to have a Gaussian shape whereas those for deuterons exhibit a two-peak structure at the two higher energies. The average in-plane transverse momentum per/nucleon and per/event shows saturation of flow around 800 MeV/nucleon for this asymmetric system. The aspect ratio of the sphericity tensor is closely correlated with the flow angle. This correlation appears to be independent of beam energy. The number of participating nucleons in central collisions varies from 213 at 400 to 135 at 1800 MeV/nucleon indicating that at the lowest energy almost the entire target nucleus participates in the collision.
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Author:Dana Richard Beavis, Rudolf BockGND, Robert Brockmann, Pawel DanielewiczORCiDGND, Sun-Yiu Fung, John W. HarrisORCiDGND, Declan KeaneORCiD, Y. M. Liu, Grazyna Janina Odyniec, Howel G. Pugh, Rainer Arno Ernst Renfordt, Andres SandovalORCiD, Dietmar Schall, Lee S. Schroeder, Reinhard StockGND, Herbert Ströbele, M. A. Vient
Parent Title (English):Physical review C
Document Type:Article
Date of Publication (online):2005/10/14
Year of first Publication:1992
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2005/10/14
Page Number:9
First Page:299
Last Page:307
Source:Phys. Rev. C 45, 299-307 (1992), ©1992 The American Physical Society,
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht