Minimal muon EM physics processes

[tmdelellis]

The muon beam is the source term itself and we must likely will not have to plan for any previous part of the beamline. In this scenario, to simulate different muon beam profiles interacting with a d-t mixture, the physics list includes standard EM muon physics, plus decay. The process: models list is:

• G4MuIonisation
  • G4ICRU73QOModel mu- 0—200 keV (Add Bragg and ICRU73QO ionization models #1309 )
  • G4BraggModel mu+ 0—200 keV (Add Bragg and ICRU73QO ionization models #1309 )
  • G4BetheBlochModel mu- and mu+ 200 keV-1 GeV (Geant4 versions prior to 11.1.0) (Add Bethe-Bloch model and refactor muon ionization #1425 )
  • G4MuBetheBlochModel mu- and mu+ above 200 keV (Add Bethe-Bloch muon ionization model #1291 )
• G4MuMultipleScattering: initially by supporting muons in Urban MSC, ultimately by addingG4WentzelVIModel (@amandalund)
• G4CoulombScattering: G4eCoulombScattering (any additions needed to support muons?)
• G4MuPairProduction: G4MuPairProductionModel (Add muon pair production #1518 )
• G4MuBremsstrahlung: G4MuBremsstrahlungModel (Add MuBremsstrahlungInteractor #257 Fix muon bremsstrahlung energy limits and sampling  #1319 Refactor muon bremsstrahlung differential cross section calculation and add documentation #1320 Refactor muon bremsstrahlung angular distribution #1509)

Verification problems

• TBD