Exclusive breakup of ${}^6\mathrm{Li}$ by ${}^{208}\mathrm{Pb}$ at Coulomb barrier energies

Differential and total cross sections for the exclusive breakup of a ${}^6\mathrm{Li}$ projectile into $\alpha +d$ and $\alpha +p$ fragments from a ${}^{208}\mathrm{Pb}$ target were measured at several energies around the Coulomb barrier. The $\alpha +d$ exclusive cross sections are well reproduced by full continuum discretized coupled channel calculations with excitation up to 11.5 MeV of the $\alpha +d$ ${(}^6{\mathrm{Li}}^{*})$ system. The total exclusive cross sections are much smaller than the inclusive ones for the production of $\alpha$ particles. This large difference gives very clear experimental evidence for the stripping breakup mechanism. Such a process, relevant in the reaction dynamics even at the Coulomb barrier with loosely bound projectiles such as ${}^6\mathrm{Li},$ needs to be carefully considered and described theoretically.