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APS » Journals » Phys. Rev. Lett. » Volume 70 » Issue 24
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Phys. Rev. Lett. 70, 3705–3708 (1993)

Observation of a saturation in the time scale for multifragment emission in symmetric heavy-ion collisions

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E. Bauge, A. Elmaani, Roy A. Lacey, J. Lauret, N. N. Ajitanand, D. Craig, M. Cronqvist, E. Gualtieri, S. Hannuschke, T. Li, B. Llope, T. Reposeur, A. Vander Molen, G. D. Westfall, J. S. Winfield, J. Yee, S. Yennello, A. Nadasen, R. S. Tickle, and E. Norbeck
Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400
National Superconducting Cyclotron Laboratory Department of Physics, Michigan State University, East Lansing, Michigan 48824-1321
Department of Physics, University of Michigan at Dearborn, Dearborn, Michigan 48128
Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1120
Department of Physics, University of Iowa, Iowa City, Iowa 52242
Institut des Science Nucléaires de Grenoble, 53 avenue des Martyrs, 38026 Grenoble CEDEX, France

Received 4 January 1993; published in the issue dated 14 June 1993

We have measured two-fragment reduced-velocity correlation functions of the intermediate mass fragments (IMF: 3≤Z≤7) produced in multifragment final states for the Kr+Nb system (E/A=35, 45, 55, 65, and 75 MeV). From the measured correlation functions we extract mean IMF emission lifetimes (τ) which are observed to decrease from τ≊400 fm/c at E/A=35 MeV to τ≊125 fm/c at E/A=55 MeV. For beam energies in excess of E/A=55 MeV, no further decrease in τ is observed, indicating a possible saturation of the mean emission lifetime for IMF produced in multifragment exit channels.

© 1993 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.70.3705
DOI:
10.1103/PhysRevLett.70.3705
PACS:
25.70.Pq
 
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