EM GS

This physics list uses “standard” Geant4 electromagnetic physics as built by the G4EmStandardPhysicsGS constructor. This configuration is same as in the default G4EmStandardPhysics constructor, except multiple scattering of \(e^-\) and \(e^+\), which is handled by the Goudsmit-Sounderson model from 0 to 100 MeV.