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The triple differential cross section of$^{208}\rm{Pb}(^6\rm{Li};\alpha,\rm{d})^{208}\rm{Pb}$ elastic Coulomb breakupis calculated using the semiclassical method. We fit the parameters of theWoods-Saxon potential using the experimental $\alpha-\rm{d}$ phase shifts fordifferent states to describe the relative motion of $\alpha$-particle anddeuteron. In order to check the validity of the two particle approach for$\alpha-d$ system we apply a potential model to describe the$^2\rm{H}(\alpha,\gamma)^6\rm{Li}$ radiative capture. Our results for theCoulomb breakup of $^6\rm{Li}$ show large value of the forward-backwardasymmetry of the $\alpha$-particle and deuteron emission around zero energy inthe $^6\rm{Li}$ center-of-mass (c.m.) system. Comparison of the results of ourcalculation with experimental data gives evidence for the dominance of theCoulomb dissociation mechanism at the $\alpha-d$ relative energy larger than$E_{\alpha\,d}>300\,\rm{keV}$ and sufficiently big contribution of nucleardistortion at $E_{\alpha\,d}$ near zero energy, but essentially smaller thanthe value reported in Ref.[F. Hammache et al. Phys.Rev. C82, 065802 (2010)].

Coulomb breakup of $^6\rm{Li}$ into $\alpha\,+\,\rm{d}$ in the field of ion $^{208}\rm{Pb}$