Proton-induced cross sections relevant to production of 225Ac and 223Ra in natural thorium targets below 200 MeV

Cross sections for Ra-223,Ra-225, Ac-225 and Th-227 production by the proton bombardment of natural thorium targets were measured at proton energies below 200 MeV. Our measurements are in good agreement with previously published data and offer a complete excitation function for Ra-223,Ra-225 in the energy range above 90 MeV. Comparison of theoretical predictions with the experimental data shows reasonable-to-good agreement. Results indicate that accelerator-based production of Ac-225 and Ra-223 below 200 MeV is a viable production method. Published by Elsevier Ltd.