Are Multifragment Emission Probabilities Reducible to an Elementary Binary Emission Probability

L. G. Moretto, Nuclear Science Division, Lawrence Berkeley Laboratory
L. Phair, Nuclear Science Division, Lawrence Berkeley Laboratory
K. Tso, Nuclear Science Division, Lawrence Berkeley Laboratory
K. Jing, Nuclear Science Division, Lawrence Berkeley Laboratory
G. J. Wozniak, Nuclear Science Division, Lawrence Berkeley Laboratory
R. T. Souza, 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
N. Carlin, 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
W. G. Gong, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
Y. D. Kim, 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
W. G. Lynch, 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
M. B. Tsang, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University
F. Zhu, National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University

Document Type

Article

Publication Date

2-27-1995

Publication Source

Physical Review Letters

Volume Number

74

Issue Number

9

First Page

1530

Last Page

1533

Publisher

American Physical Society

Abstract

Experimental intermediate-mass-fragment multiplicity distributions for the EA=80 and 110 MeV Ar36 + Au197reactions are shown to be binomial at all excitation energies. From these distributions, a single binary event probability p can be extracted that has a thermal dependence. Thus, it is inferred that multifragmentation is reducible to a combination of nearly independent emission processes. If sequential decay is assumed, the increase of p with excitation energy implies a contraction of the time scale that is qualitatively consistent with recent fragment-fragment correlation data.

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