Residue excitation functions from complete fusion of [sup 16]O with [sup 197]Au and [sup 208]Pb

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.50.309· OSTI ID:7032914

Brinkmann, K; Caraley, A L; Fineman, B J; Gan, N; Velkovska, J; McGrath, R L ^[1]

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1. Physics Department, State University of New York at Stony Brook, Stony Brook, New York 11794 (United States)

Evaporation residue excitation functions and [alpha]-multiplicities from complete fusion of [sup 16]O with [sup 197]Au and [sup 208]Pb have been measured from the fusion threshold up to 140 MeV incident energy. The data allow the conclusion that strongly overdamped motion cannot be dominant at energies in the vicinity of the fusion barrier below [ital E][sup *][approx]50 MeV. At excitation energies above 50 MeV the residue cross section for [sup 16]O+[sup 208]Pb is much greater than predicted from the statistical model with conventional parametrizations. The enhancement is not explained by incorporating dynamical effects into the analysis. An alternative suggestion based on deexcitation-chain dependent fission barriers is discussed.

• OSTI ID: 7032914
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 50:1; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663450* -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
663580 -- Nuclear Mass Ranges-- A=190-219-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHARGED-PARTICLE REACTIONS
COMPOUND NUCLEI
CROSS SECTIONS
ENERGY RANGE
EXCITATION FUNCTIONS
FISSION BARRIER
FUNCTIONS
GOLD 197 TARGET
HEAVY ION FUSION REACTIONS
HEAVY ION REACTIONS
LEAD 208 TARGET
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR POTENTIAL
NUCLEAR REACTIONS
OXYGEN 16 REACTIONS
POTENTIALS
STATISTICAL MODELS
TARGETS