G4BetheBlochModel.hh

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//
// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
//
// File name:     G4BetheBlochModel
//
// Author:        Vladimir Ivanchenko on base of Laszlo Urban code
//
// Creation date: 03.01.2002
//
// Modifications:
//
// Modified by Michel Maire and Vladimir Ivanchenko
//
// Class Description:
//
// Implementation of Bethe-Bloch model of energy loss and
// delta-electron production by heavy charged particles
 
// -------------------------------------------------------------------
//
 
#ifndef G4BetheBlochModel_h
#define G4BetheBlochModel_h 1
 
#include <CLHEP/Units/SystemOfUnits.h>
 
#include "G4VEmModel.hh"
#include "G4NistManager.hh"
 
class G4EmCorrections;
class G4ParticleChangeForLoss;
class G4ICRU90StoppingData;
 
class G4BetheBlochModel : public G4VEmModel
{
 
public:
 
  explicit G4BetheBlochModel(const G4ParticleDefinition* p = nullptr,
                 const G4String& nam = "BetheBloch");
 
  virtual ~G4BetheBlochModel();
 
  virtual void Initialise(const G4ParticleDefinition*, 
              const G4DataVector&) override;
 
  virtual G4double MinEnergyCut(const G4ParticleDefinition*,
                const G4MaterialCutsCouple* couple) override;
 
  virtual G4double ComputeCrossSectionPerElectron(
                 const G4ParticleDefinition*,
                 G4double kineticEnergy,
                 G4double cutEnergy,
                 G4double maxEnergy);
                 
  virtual G4double ComputeCrossSectionPerAtom(
                 const G4ParticleDefinition*,
                 G4double kineticEnergy,
                 G4double Z, G4double A,
                 G4double cutEnergy,
                 G4double maxEnergy) override;
                                 
  virtual G4double CrossSectionPerVolume(const G4Material*,
                 const G4ParticleDefinition*,
                 G4double kineticEnergy,
                 G4double cutEnergy,
                 G4double maxEnergy) override;
                 
  virtual G4double ComputeDEDXPerVolume(const G4Material*,
                    const G4ParticleDefinition*,
                    G4double kineticEnergy,
                    G4double cutEnergy) override;
 
  virtual G4double GetChargeSquareRatio(const G4ParticleDefinition* p,
                    const G4Material* mat,
                    G4double kineticEnergy) override;
 
  virtual G4double GetParticleCharge(const G4ParticleDefinition* p,
                     const G4Material* mat,
                     G4double kineticEnergy) override;
 
  virtual void CorrectionsAlongStep(const G4MaterialCutsCouple* couple,
                    const G4DynamicParticle* dp,
                    G4double& eloss,
                    G4double&,
                    G4double length) override;
 
  virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
                 const G4MaterialCutsCouple*,
                 const G4DynamicParticle*,
                 G4double tmin,
                 G4double maxEnergy) override;
 
protected:
 
  virtual G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
                      G4double kinEnergy) override;
 
  inline G4double GetChargeSquareRatio() const;
 
  inline void SetChargeSquareRatio(G4double val);
 
private:
 
  void SetupParameters();
 
  inline void SetParticle(const G4ParticleDefinition* p);
 
  inline void SetGenericIon(const G4ParticleDefinition* p);
 
  // hide assignment operator
  G4BetheBlochModel & operator=(const  G4BetheBlochModel &right) = delete;
  G4BetheBlochModel(const  G4BetheBlochModel&) = delete;
 
  const G4ParticleDefinition* particle;
  G4ParticleDefinition*       theElectron;
  G4EmCorrections*            corr;
  G4ParticleChangeForLoss*    fParticleChange;
  G4NistManager*              nist;
  G4ICRU90StoppingData*       fICRU90;
  const G4Material*           currentMaterial;
  const G4Material*           baseMaterial;
 
  G4double mass;
  G4double tlimit;
  G4double spin;
  G4double magMoment2;
  G4double chargeSquare;
  G4double ratio;
  G4double formfact;
  G4double twoln10;
  G4double corrFactor;
  G4double fAlphaTlimit;
  G4double fProtonTlimit;
 
  G4int    iICRU90;
  G4bool   isIon;
};
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
inline void G4BetheBlochModel::SetParticle(const G4ParticleDefinition* p)
{
  if(particle != p) {
    particle = p;
    if(p->GetBaryonNumber() > 3 || p->GetPDGCharge() > CLHEP::eplus) 
      { isIon = true; } 
    SetupParameters();
  }
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
inline void G4BetheBlochModel::SetGenericIon(const G4ParticleDefinition* p)
{
  if(p && p->GetParticleName() == "GenericIon") { isIon = true; }
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
inline G4double G4BetheBlochModel::GetChargeSquareRatio() const
{
  return chargeSquare;
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
inline void G4BetheBlochModel::SetChargeSquareRatio(G4double val)
{
  chargeSquare = val;
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 
#endif