Reaction dynamics induced by weakly bound nuclei at energies around the Coulomb barrier are now one of the frontier research topics of nuclear physics. In this work, the quasielastic scattering angular distribution of the radioactive nucleus ${}^7\mathrm{Be}$ from a ${}^{120}\mathrm{Sn}$ target was measured by using a silicon detector array with a large solid-angle coverage for the first time at an energy of 48.05 MeV. The data are analyzed using the newly developed continuum-discretized coupled-channels (CDCC) procedure, CDCC-R. The effects of breakup continuum states on the quasielastic scattering are found to be minor by switching on and off the continuum couplings in the CDCC-R calculations. Moreover, the total reaction cross section of ${}^7\mathrm{Be}$ $+$ ${}^{120}\mathrm{Sn}$ is extracted by the combination of the Bayesian method and the optical model. It is in agreement with the systematic trend of the weakly bound nuclei ${}^{6,7,8}\mathrm{Li}$ on the ${}^{120}\mathrm{Sn}$ target, and the influences of different targets are insignificant.

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• Elastic scattering reactions
• Low & intermediate energy heavy-ion reactions
• Optical, coupled-channel & distorted wave models