Optical model calculations on the threshold anomaly for the {sup 6}Li+{sup 28}Si and {sup 7}Li+{sup 28}Si systems at near-Coulomb-barrier energies

Journal Article · Wed Dec 15 00:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.067601· OSTI ID:21499306

Gomez Camacho, A ^[1]; Gomes, P R. S.; Lubian, J ^[2]

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1. Departamento de Aceleradores, Instituto Nacional de Investigaciones Nucleares, Apartado Postal 18-1027, C.P. 11801, Mexico, D.F. (Mexico)
2. Instituto de Fisica, Universidade Federal Fluminenese, Avenida Litoranea s/n, Gragoata, Niteroi, Rio de Janeiro 24210-340 (Brazil)

A simultaneous analysis of elastic scattering, fusion, and total reaction cross sections for the weakly bound systems {sup 6,7}Li+{sup 28}Si at energies close to the Coulomb barrier is performed by optical model calculations. The nuclear polarization potential U is split into volume part U{sub F}, which accounts for fusion reactions and a surface part U{sub DR}, responsible for direct reactions. The parameters of the Woods-Saxon potentials are determined by a {chi}{sup 2} analysis of the data. The presence of the threshold anomaly or the breakup threshold anomaly is investigated from the energy dependence of both the fusion and direct reaction parts of the polarization potential.

• OSTI ID: 21499306
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 6; Other Information: DOI: 10.1103/PhysRevC.82.067601; (c) 2010 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COULOMB FIELD
DIRECT REACTIONS
ELASTIC SCATTERING
ENERGY DEPENDENCE
LITHIUM 6 REACTIONS
LITHIUM 7 REACTIONS
OPTICAL MODELS
POLARIZATION
SILICON 28 TARGET
SURFACES
THERMONUCLEAR REACTIONS
TOTAL CROSS SECTIONS
WOODS-SAXON POTENTIAL
CROSS SECTIONS
ELECTRIC FIELDS
HEAVY ION REACTIONS
MATHEMATICAL MODELS
NUCLEAR POTENTIAL
NUCLEAR REACTIONS
NUCLEOSYNTHESIS
POTENTIALS
SCATTERING
SYNTHESIS
TARGETS