The elastic scattering of 6Li+28Si at near-barrier energies

Coupled-channel effects in elastic scattering and near-barrier fusion induced by weakly bound nuclei and exotic halo nuclei

“…Within the uncertainties, the surface strengths of the real parts of the best fit OM potentials show no dependence on incident energy for either isotope. This is also true for the imaginary part for 7 Li, while the imaginary part for 6 Li seems to show a gradual rise in surface strength as the incident energy is reduced towards threshold, as seen previously for other targets [78,79]. However, given the somewhat artificial constraints employed in the grid searches carried out to define the error bars on the OM potentials one may equally argue that the 6 Li imaginary potential surface strength is also consistent with little or no variation with incident energy.…”

Coupled channel effect in elastic scattering and fusion for6,7Li+28Si

“…The measured fusion cross section at above barrier energies showed suppression [1,2] when compared with one dimensional barrier penetration model (1D BPM), whereas the same were enhanced at sub barrier energies [2,3]. On the otherhand, the near barrier behaviour of the interaction potential for 6,7 Li+ 28 Si [4,5] as a function of energy was found to be quite different compared to the observations with heavier targets. Recently, a simultaneous description of the elastic, fusion and reaction cross sections has been made by A. Gomez Camacho etal.…”

“…transfer) on fusion, elastic scattering and barrier distribution is def nitely interesting to probe the interplay of the different processes. With this motivation we present the results of the measurements and analysis of elastic cross sections for the 6,7 Li+ 28 Si systems. The effect of breakup on elastic was also observed in the energy range with E/V b = 0.9 to 3.0, employing CDCC calculation.…”

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Abstract.The fusion excitation and elastic angular distribution were measured for 6,7 Li+ 28 Si from below to above Coulomb barrier (≤ 3V b ) energies. The barrier distribution derived from the fusion data was found to be broad and asymmetric at the sub-barrier region, compared to 1D BPM estimation.

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Elastic scattering with weakly bound projectiles

“…When one of the participants is weakly bound, there is a possibility of having a break-up channel that does not close so fast in the vicinity of the Coulomb barrier. This effect has been proposed as a possible explanation of the absence of the "normal threshold anomaly" for 6,7 Li + 28 Si [2,3].…”