Resonant, direct, and transfer breakup of Li6 by Sn112

Abstract

Projectile breakup cross sections in the $^{6}\mathrm{Li}+^{112}\mathrm{Sn}$ reaction have been measured at two beam energies, 30 and 22 MeV. Cross sections for sequential breakup of $^{6}\mathrm{Li}$ into $\ensuremath{\alpha}+d$ via its resonant state of ${1}^{+}$ (5.65 MeV) in the continuum have been measured for the first time along with two other dominant resonant states of ${3}^{+}$ (2.18 MeV) and ${2}^{+}$ (4.31 MeV) at ${E}_{\mathrm{beam}}=30$ MeV. However, at 22 MeV, the $\ensuremath{\alpha}+d$ breakup is found to be only due to direct breakup process. Cross sections measured for sequential breakup via two transfer channels, $(^{6}\mathrm{Li},^{5}\mathrm{Li})$ and $(^{6}\mathrm{Li},^{8}\mathrm{Be})$, into $\ensuremath{\alpha}+p$ and $\ensuremath{\alpha}+\ensuremath{\alpha}$, respectively, and the above $\ensuremath{\alpha}+d$ breakup channels compared with the results of coupled-channels calculations unravel the reaction mechanisms involving a weakly bound projectile and different processes leading to large inclusive $\ensuremath{\alpha}$-particle production.