Fragment Multiplicity Dependent Charge Distributions in Heavy Ion Collisions

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
M. J. Huang, 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
L. Phair, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
D. R. Bowman, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
J. Dinius, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
C. K. Gelbke, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
D. O. Handzy, 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
G. J. Kunde, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
M. A. Lisa, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
Graham F. Peaslee, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State UniversityFollow
A. Botvina, Institute for Nuclear Research
M-C. Lemaire, Laboratoire National SATURNE, CEN Saclay
S. R. Souza, Laboratoire National SATURNE, CEN Saclay
G. Van Buren, Department of Chemistry, Washington University
R. J. Charity, Department of Chemistry, Washington University
L. G. Sobotka, Department of Chemistry, Washington University
C. Schwarz, Gesellschaft für Schwerionenforschung
U. Lynen, Gesellschaft für Schwerionenforschung
J. Pochodzalla, Gesellschaft für Schwerionenforschung
H. Sann, Gesellschaft für Schwerionenforschung
W. Trautmann, Gesellschaft für Schwerionenforschung
D. Fox, Department of Chemistry and IUCF, Indiana University
R. T. de Souza, Department of Chemistry and IUCF, Indiana University
N. Carlin, Department of Chemistry and IUCF, Indiana University

Document Type

Article

Publication Date

2-1-1997

Publication Source

Physical Review C

Volume Number

55

Issue Number

2

First Page

R557

Last Page

R561

Publisher

American Physical Society

Abstract

The dependence of intermediate-mass-fragment (IMF) element distributions on the multiplicity, NIMF, of detected fragments has been measured for 84Kr+197Au collisions at E/A=35, 55, 70, 100, 200, and 400 MeV. The observed dependence can be parametrized as P(NIMF|Z)∝P(Z)exp(-c⋅NIMF⋅Z), where c is a beam-energy and excitation-energy dependent parameter. Previous work indicated this parameter is zero in the liquid-gas coexistence region and positive in the gaseous phase. In contrast, we observe both negative and positive values for c, revealing the meaning of this parameter to be less straightforward than previously assumed. The magnitude of c appears nonetheless to provide a nontrivial test of multifragmentation models.

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