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

Journal Article · Mon Jun 14 00:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.70.3705· OSTI ID:6382182

Bauge, E; Elmaani, A; Lacey, R A; Lauret, J; Ajitanand, N N; Craig, D; Cronqvist, M; Gualtieri, E; Hannuschke, S; Li, T; Llope, B; Reposeur, T; Vander Molen, A; Westfall, G D; Winfield, J S; Yee, J; Yennello, S; Nadasen, A; Tickle, R S; Norbeck, E ^[1]

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1. Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400 (United States) National Superconducting Cyclotron Laboratory Department of Physics, Michigan State University, East Lansing, Michigan 48824-1321 (United States) Department of Physics, University of Michigan at Dearborn, Dearborn, Michigan 48128 (United States) Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1120 (United States) Department of Physics, University of Iowa, Iowa City, Iowa 52242 (United States) Institut des Science Nucleaires de Grenoble, 53 avenue des Martyrs, 38026 Grenoble CEDEX (France)

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

• OSTI ID: 6382182
• Journal Information: Physical Review Letters; (United States), Vol. 70:24; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
KRYPTON 84 REACTIONS
CORRELATION FUNCTIONS
LIFETIME
EMISSION
NIOBIUM 93 TARGET
HEAVY ION REACTIONS
MEV RANGE 10-100
NUCLEAR FRAGMENTS
SATURATION
VELOCITY
CHARGED-PARTICLE REACTIONS
ENERGY RANGE
FUNCTIONS
MEV RANGE
NUCLEAR REACTIONS
TARGETS
663450* - Heavy-Ion-Induced Reactions & Scattering- (1992-)