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APS » Journals » Phys. Rev. Lett. » Volume 74 » Issue 9
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Phys. Rev. Lett. 74, 1530–1533 (1995)

Are Multifragment Emission Probabilities Reducible to an Elementary Binary Emission Probability

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L. G. Moretto, L. Phair, K. Tso, K. Jing, and G. J. Wozniak
Nuclear Science Division, Lawrence Berkeley Laboratory, Berkeley, California 94720

R. T. Souza*, D. R. Bowman†, N. Carlin‡, C. K. Gelbke, W. G. Gong§, Y. D. Kim**, M. A. Lisa§, W. G. Lynch, G. F. Peaslee††, M. B. Tsang, and F. Zhu‡‡
National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824

Received 2 May 1994; revised 28 October 1994; published in the issue dated 27 February 1995

Experimental intermediate-mass-fragment multiplicity distributions for the E/A=80 and 110 MeV 36Ar + 197Au reactions 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.

© 1995 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.74.1530
DOI:
10.1103/PhysRevLett.74.1530
PACS:
25.70.Pq

*Present address: Indiana University Cyclotron Facility, Bloomington, IN 47405.

†Present address: Chalk River Laboratories, Chalk River, Ontario K0J 1J0, Canada.

‡Present address: Instituto de Fisica, Universidade de Sao Paulo, C.P. 20516, CEP 01498, Sao Paulo, Brazil.

§Present address: Lawrence Berkeley Laboratory, Berkeley, CA 94720.

**Present address: National Laboratory for High Energy Physics, 1-1 Oho, Tsukuba, Ibaraki 305, Japan.

††Present address: Physics Department, Hope College, Holland, MI 49423.

‡‡Present address: Brookhaven National Laboratory, Upton, NY 11973.

 
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