The deep level transient spectroscopy technique has been used to study the interaction of 5.48 MeV a particles with deep levels in Pt-doped n-type silicon. Production rates and annealing behaviors of alpha-radiation-induced levels in the presence of platinum have been investigated. Isochronal annealing characteristics of Pt-related levels before and after irradiation have also been studied. Our results are compared to published data on electron irradiation of Si:Pt.