Energy dependence of the optical potential of weakly and tightly bound nuclei as projectiles on a medium-mass target

Journal Article · Mon Feb 15 00:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.024613· OSTI ID:21386616

Figueira, J M; Arazi, A; Carnelli, P; Heimann, D Martinez; Negri, A E; Pacheco, A J ^[1]; Niello, J O. Fernandez ^[1]; Capurro, O A; Fimiani, L; Marti, G V ^[1]; Lubian, J; Monteiro, D S; Gomes, P R. S. ^[2]

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1. Laboratorio Tandar, Comision Nacional de Energia Atomica, B1650KNA San Martin, Buenos Aires (Argentina)
2. Instituto de Fisica, Universidade Federal Fluminense, Gragoata, Niteroi, R. J., 24210-340 (Brazil)

Angular distributions for the elastic scattering of the weakly bound {sup 6,7}Li+{sup 144}Sm systems were measured with high accuracy at bombarding energies from 85% up to 170% of the Coulomb barrier. An optical model analysis was performed, and the relevant parameters of the real and imaginary parts of the optical potential were extracted. The results are compared with those previously published for the tightly bound {sup 12}C+{sup 144}Sm and {sup 16}O+{sup 144}Sm systems. The usual threshold anomaly observed in the behavior of the potential of tightly bound systems was not observed for either weakly bound system. This absence is attributed to the repulsion due to breakup coupling which cancels the attraction arising from couplings with bound channels.

• OSTI ID: 21386616
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 81, Issue 2; Other Information: DOI: 10.1103/PhysRevC.81.024613; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
CARBON 12
COULOMB FIELD
COUPLING
ELASTIC SCATTERING
ENERGY DEPENDENCE
LITHIUM 6
LITHIUM 7
MASS
OPTICAL MODELS
OXYGEN 16
PROJECTILES
SAMARIUM 144
WEAK-COUPLING MODEL
CARBON ISOTOPES
DISTRIBUTION
ELECTRIC FIELDS
EVEN-EVEN NUCLEI
INTERMEDIATE MASS NUCLEI
ISOTOPES
LIGHT NUCLEI
LITHIUM ISOTOPES
MATHEMATICAL MODELS
NUCLEAR MODELS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
OXYGEN ISOTOPES
RARE EARTH NUCLEI
SAMARIUM ISOTOPES
SCATTERING
STABLE ISOTOPES