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

Journal Article · Fri Jul 01 00:00:00 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), Vol. 50:1; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

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