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We present a systematic study of $^{6}$Li elastic scattering and totalreaction cross sections at incident energies around the Coulomb barrier withinthe continuum discretized coupled-channels (CDCC) framework, where $^{6}$Li istreated in an $\alpha$+$d$ two-body model. Collisions with $^{27}$Al,$^{64}$Zn, $^{138}$Ba and $^{208}$Pa are analyzed. The microscopic opticalpotentials (MOP) based on Skyrme nucleon-nucleon interaction for $\alpha$ and$d$ are adopted in CDCC calculations and satisfactory agreement with theexperimental data is obtained without any adjustment on MOPs. For comparison,the $\alpha$ and $d$ global phenomenological optical potentials (GOP) are alsoused in CDCC analysis and a reduction no less than 50$\%$ on the surfaceimaginary part of deuteron GOP is required for describing the data. In allcases, the $^6$Li breakup effect is significant and provides repulsivecorrection to the folding model potential. The reduction on the surfaceimaginary part of GOP of deuteron reveals a strong suppression of the reactionprobability of deuteron as a component of $^{6}$Li as compared with that of afree deuteron. A further investigation is made by taking the $d$ breakupprocess into account equivalently within the dynamic polarization potentialapproach and it shows that $d$ behaves like a tightly bound nucleus in $^{6}$Liinduced reactions.

Elastic scattering and total reaction cross sections of $^{6}$Li studied with a microscopic continuum discretized coupled channels model