Model for low-energy protons interactions

I want to investigate yields of isotopes on U238 and Th232 irradiated by protons with energy lower than 18MeV. For this I use PRECISIO model in DEFAULTS card. Is that OK for this range of energies ?

Yes (with PRECISIO, protons are transported down to 100 keV). Add also two PHYSICS cards with COALESCE (and WHAT(1)=1.0) and EVAPORAT (WHAT(1)=3.0).