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Phys. Rev. Lett. 75, 1475–1478 (1995)

Assessing the Evolutionary Nature of Multifragment Decay

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E. Cornell, T. M. Hamilton, D. Fox, Y. Lou, and R. T. de Souza
Department of Chemistry and Indiana University Cyclotron Facility, Indiana University, Bloomington, Indiana 47405

M. J. Huang, W. C. Hsi, C. Schwarz, C. Williams, D. R. Bowman, J. Dinius, C. K. Gelbke, T. Glasmacher, D. O. Handzy, M. A. Lisa, W. G. Lynch, G. F. Peaslee, L. Phair, and M. B. Tsang
National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824

G. VanBuren, R. J. Charity, and L. G. Sobotka
Department of Chemistry, Washington University, St. Louis, Missouri 63130

W. A. Friedman
Department of Physics, University of Wisconsin, Madison, Wisconsin 53076

Received 6 March 1995; published in the issue dated 21 August 1995

Multifragment decays of central collisions in 84Kr+197Au at E/A = 35, 55, and 70 MeV are studied. The dependence of the extracted emission time on the velocity of the fragment pair is investigated. More energetic pairs manifest a stronger Coulomb interaction, indicating emission from a source of smaller spatial-temporal extent than less energetic pairs. This trend can be understood in the context of a statistical model that allows the source characteristics to evolve as the fragments are emitted.

© 1995 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.75.1475
DOI:
10.1103/PhysRevLett.75.1475
PACS:
25.70.Pq
 
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