Résumé : Coulomb breakup has been proposed as an indirect technique to infer radiative-capture cross sections at low energies. To test this idea we have performed the Flubber experiment at the FRIBs facility of the Laboratori Nazionali del Sud (Catania, Italy). In this experiment, the breakup of 17F has been measured on lead and carbon targets at 40 MeV/nucleon. We plan to evaluate the accuracy of the indirect technique by comparing the radiative-capture cross section inferred from the Coulomb-breakup data to accurate direct measurements. The motivation of this measurement is reported as well as the experimental setup and a preliminary theoretical study.