Résumé : As a continuation of a systematic study of reactions relevant to the astrophysical [Formula Presented] process, the cross sections of the [Formula Presented] and [Formula Presented] reactions have been measured at energies from 1.3 to [Formula Presented] using an activation technique. The results are compared to the predictions of Hauser-Feshbach statistical model calculations using the NON-SMOKER and MOST codes. The sensitivity of the calculations to variations in the optical proton potential and the nuclear level density was studied. Good agreement between theoretical and experimental reaction rates was found for the reactions [Formula Presented] and [Formula Presented]. © 2003 The American Physical Society.