As the photo-electric effect vanishes at high energies whereas the muon nuclear interaction cross-section is null at low energies, the two effects are stored within the same bank in order to save space.
From 10 KeV to 50 MeV : Photo-electric effect mean free path [PHYS 230] From 1 GeV to 10 TeV : Muon nuclear interaction mean free path [PHYS 460].