Add Molybdenum to MyMaterial.cc, the deltaZ (slice thickness) in the DetectorConstruction.cc and changes at PrimaryGeneratorAction.cc. This code can simulate Beryllium phantom irradiated be electrons of 0.521 MeV and 1.033 MeV and Molybdenum phanton irradiated by electrons of 0.5 MeV and 1.0 MeV. To do that just change the energy in PrimaryGeneratorAction.cc, the phantom material and slice thicknees accordingly in the DetectorConstruction.cc.