G4BraggModel.hh

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//
// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
//
// File name:     G4BraggModel
//
// Author:        Vladimir Ivanchenko
//
// Creation date: 03.01.2002
//
// Modifications:
// 23-12-02 V.Ivanchenko change interface in order to moveto cut per region
// 24-01-03 Make models region aware (V.Ivanchenko)
// 13-02-03 Add name (V.Ivanchenko)
// 12-11-03 Fix for GenericIons (V.Ivanchenko)
// 11-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
// 15-02-06 ComputeCrossSectionPerElectron, ComputeCrossSectionPerAtom (mma)
// 25-04-06 Added stopping data from PSTAR (V.Ivanchenko)
// 12-08-08 Added methods GetParticleCharge, GetChargeSquareRatio, 
//          CorrectionsAlongStep needed for ions(V.Ivanchenko)
 
//
// Class Description:
//
// Implementation of energy loss and delta-electron production
// by heavy slow charged particles using ICRU'49 and NIST evaluated data 
// for protons
 
// -------------------------------------------------------------------
//
 
#ifndef G4BraggModel_h
#define G4BraggModel_h 1
 
#include <CLHEP/Units/PhysicalConstants.h>
 
#include "G4VEmModel.hh"
#include "G4PSTARStopping.hh"
 
class G4ParticleChangeForLoss;
class G4EmCorrections;
class G4ICRU90StoppingData;
 
class G4BraggModel : public G4VEmModel
{
 
public:
 
  explicit G4BraggModel(const G4ParticleDefinition* p = nullptr,
            const G4String& nam = "Bragg");
 
  ~G4BraggModel() override;
 
  void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;
 
  G4double MinEnergyCut(const G4ParticleDefinition*,
            const G4MaterialCutsCouple* couple) 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;
 
  // Compute ion charge 
  G4double GetChargeSquareRatio(const G4ParticleDefinition*,
                const G4Material*,
                G4double kineticEnergy) override;
 
  G4double GetParticleCharge(const G4ParticleDefinition* p,
                 const G4Material* mat,
                 G4double kineticEnergy) override;
 
  // hide assignment operator
  G4BraggModel & operator=(const  G4BraggModel &right) = delete;
  G4BraggModel(const  G4BraggModel&) = delete;
 
protected:
 
  G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
                  G4double kinEnergy) final;
 
  inline G4double GetChargeSquareRatio() const;
 
  inline void SetChargeSquareRatio(G4double val);
 
private:
 
  inline void SetParticle(const G4ParticleDefinition* p);
 
  void HasMaterial(const G4Material* material);
 
  G4double StoppingPower(const G4Material* material,
             G4double kineticEnergy);
 
  G4double ElectronicStoppingPower(G4double z,
                                   G4double kineticEnergy) const;
 
  G4double DEDX(const G4Material* material, G4double kineticEnergy);
 
  G4bool MolecIsInZiegler1988(const G4Material* material);
 
  G4double ChemicalFactor(G4double kineticEnergy, G4double eloss125) const;
 
  G4EmCorrections*             corr = nullptr;
  const G4ParticleDefinition*  particle = nullptr;
  G4ParticleDefinition*        theElectron = nullptr;
  G4ParticleChangeForLoss*     fParticleChange = nullptr;
  G4ICRU90StoppingData*        fICRU90 = nullptr;
 
  const G4Material*            currentMaterial = nullptr;
  const G4Material*            baseMaterial = nullptr;
 
  static G4PSTARStopping*      fPSTAR;
 
  G4double mass;
  G4double spin;
  G4double chargeSquare;
  G4double massRate;
  G4double ratio;
  G4double lowestKinEnergy;
  G4double protonMassAMU;
  G4double theZieglerFactor;
  G4double expStopPower125;  // Experimental Stopping power at 125keV
 
  G4int    iMolecula = -1;   // index in the molecula's table
  G4int    iPSTAR = -1;      // index in PSTAR
  G4int    iICRU90 = -1;
  G4bool   isIon = false;
};
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 
inline void G4BraggModel::SetParticle(const G4ParticleDefinition* p)
{
  particle = p;
  mass = particle->GetPDGMass();
  spin = particle->GetPDGSpin();
  G4double q = particle->GetPDGCharge()/CLHEP::eplus;
  chargeSquare = q*q;
  massRate     = mass/CLHEP::proton_mass_c2;
  ratio = CLHEP::electron_mass_c2/mass;
}
 
inline G4double G4BraggModel::GetChargeSquareRatio() const
{
  return chargeSquare;
}
 
inline void G4BraggModel::SetChargeSquareRatio(G4double val)
{
  chargeSquare = val;
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 
#endif