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Phys. Rev. Lett. 86, 5023 - 5026 (2001)

Isotopic Scaling in Nuclear Reactions

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M. B. Tsang1, W. A. Friedman2, C. K. Gelbke1, W. G. Lynch1, G. Verde1, and H. S. Xu1
1National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824
2Department of Physics, University of Wisconsin, Madison, Wisconsin 53706

Received 12 July 2000; revised 16 February 2001

A three parameter scaling relationship between isotopic distributions for elements with Z≤8 has been observed. This allows a simple description of the dependence of such distributions on the overall isospin of the system. This scaling law (termed isoscaling) applies for a variety of reaction mechanisms that are dominated by phase space, including evaporation, multifragmentation, and deeply inelastic scattering. The origins of this scaling behavior for the various reaction mechanisms are explained. For multifragmentation processes, the systematics is influenced by the density dependence of the asymmetry term of the equation of state.


©2001 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.86.5023
DOI: 10.1103/PhysRevLett.86.5023
PACS: 24.60.Ky, 24.10.Pa, 25.70.Pq

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