Diferences between physics model in examples


I am running TestEm7 and Hadr02 example, using same target (2 cm of Pb), same beam particle (e-) and same energy of the beam (25 MeV). The when I collect the secondary photons, the numbers of secondaries photos is different also the energy spectra, why the difference, and how I know which physics model to use


sorry for the later reply. I do not know exact answer - need to see plots and have more details but the answer may be general: in Hadr02 you likely use one of reference PhysicsLists with full physics, in TestEm7 by default only electromagnetic interactions are enabled.