Mass Dependence of Directed Collective Flow

M. J. Huang, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
R. C. Lemmon, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
F. Daffin, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
W. G. Lynch, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
C. Schwarz, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University / Gesellschaft für Schwerionenforschung
M. B. Tsang, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
C. Williams, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
P. Danielewicz, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
K. Haglin, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
W. Bauer, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
N. Carlin, Instituto de Fisica, Universidade de São Paulo
R. J. Charity, Department of Chemistry, Washington University
R. T. de Souza, Indiana University Cyclotron Facility and Department of Chemistry, Indiana University
C. K. Gelbke, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
W. C. Hsi, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University / Indiana University Cyclotron Facility and Department of Chemistry, Indiana University
G. J. Kunde, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University / Gesellschaft für Schwerionenforschung
M. C. Lemaire, Laboratoire National SATURNE, CEN Saclay
M. A. Lisa, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
U. Lynen, Gesellschaft für Schwerionenforschung
Graham F. Peaslee, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State UniversityFollow
J. Pochodzalla, Gesellschaft für Schwerionenforschung
H. Sann, Gesellschaft für Schwerionenforschung
L. G. Sobotka, Department of Chemistry, Washington University
S. R. Souza, Laboratoire National SATURNE, CEN Saclay
W. Trautmann, Gesellschaft für Schwerionenforschung

Document Type

Article

Publication Date

10-28-1996

Publication Source

Physical Review Letters

Volume Number

77

Issue Number

18

First Page

3739

Last Page

3742

Publisher

American Physical Society

Abstract

Sidewards directed fragment flow has been extracted for 84Kr+197Au collisions at E/A=200MeV, using techniques that are free of reaction plane dispersion. The fragment flow per nucleon increases with mass, following a thermal or coalescencelike behavior, and attains roughly constant limiting values at 4≤A≤12. Comparisons of the impact parameter dependences of the measured coalescence-invariant proton flow to Boltzmann-Uehling-Uhlenbeck calculations clearly favor a momentum dependent nuclear mean field.

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