G4MuBetheBlochModel.hh

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//
// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
//
// File name:     G4MuBetheBlochModel
//
// Author:        Vladimir Ivanchenko on base of Laszlo Urban code
//
// Creation date: 09.08.2002
//
// Modifications:
//
// 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
// 24-01-03 Make models region aware (V.Ivanchenko)
// 13-02-03 Add Nama (V.Ivanchenko)
// 10-02-04 Calculation of radiative corrections using R.Kokoulin model (V.I)
// 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
// 12-04-05 Add usage of G4EmCorrections (V.Ivanchenko)
// 13-02-06 ComputeCrossSectionPerElectron, ComputeCrossSectionPerAtom (mma)
//
 
//
// Class Description:
//
// Implementation of Bethe-Bloch model of energy loss and
// delta-electron production by heavy charged particles
 
// -------------------------------------------------------------------
//
 
#ifndef G4MuBetheBlochModel_h
#define G4MuBetheBlochModel_h 1
 
#include <CLHEP/Units/PhysicalConstants.h>
 
#include "G4VEmModel.hh"
 
class G4ParticleChangeForLoss;
class G4EmCorrections;
 
class G4MuBetheBlochModel : public G4VEmModel
{
 
public:
 
  explicit G4MuBetheBlochModel(const G4ParticleDefinition* p = nullptr,
                               const G4String& nam = "MuBetheBloch");
 
  ~G4MuBetheBlochModel() = default;
 
  void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;
 
  G4double MinEnergyCut(const G4ParticleDefinition*,
            const G4MaterialCutsCouple*) override;
            
  G4double ComputeCrossSectionPerElectron(
                 const G4ParticleDefinition*,
                 G4double kineticEnergy,
                 G4double cutEnergy,
                 G4double maxEnergy);
                 
  G4double ComputeCrossSectionPerAtom(
                 const G4ParticleDefinition*,
                 G4double kineticEnergy,
                 G4double Z, G4double A,
                 G4double cutEnergy,
                 G4double maxEnergy) override;
                                 
  G4double CrossSectionPerVolume(const G4Material*,
                 const G4ParticleDefinition*,
                 G4double kineticEnergy,
                 G4double cutEnergy,
                 G4double maxEnergy) override;
 
  G4double ComputeDEDXPerVolume(const G4Material*,
                                const G4ParticleDefinition*,
                                G4double kineticEnergy,
                                G4double cutEnergy) override;
 
  void SampleSecondaries(std::vector<G4DynamicParticle*>*,
                const G4MaterialCutsCouple*,
                const G4DynamicParticle*,
                G4double tmin,
                G4double maxEnergy) override;
 
  // hide assignment operator
  G4MuBetheBlochModel & operator=(const  G4MuBetheBlochModel &right) = delete;
  G4MuBetheBlochModel(const  G4MuBetheBlochModel&) = delete;
 
protected:
 
  G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
                              G4double kinEnergy) override;
 
private:
 
  inline void SetParticle(const G4ParticleDefinition* p);
 
  const G4ParticleDefinition* particle = nullptr;
  G4ParticleDefinition*       theElectron = nullptr;
  G4ParticleChangeForLoss*    fParticleChange = nullptr;
  G4EmCorrections*            corr = nullptr;
 
  G4double limitKinEnergy;
  G4double logLimitKinEnergy;
  G4double mass = 1.0;
  G4double massSquare = 1.0;
  G4double ratio = 1.0;
  G4double twoln10;
  G4double alphaprime;
  static G4double xgi[8],wgi[8];
};
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 
inline void G4MuBetheBlochModel::SetParticle(const G4ParticleDefinition* p)
{
  if(nullptr == particle) {
    particle = p;
    mass = particle->GetPDGMass();
    massSquare = mass*mass;
    ratio = CLHEP::electron_mass_c2/mass;
  }
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
 
#endif