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// $Id: G4BraggModel.hh,v 1.11 2004/02/15 17:08:49 vnivanch Exp $
// GEANT4 tag $Name: geant4-06-01 $
//
// -------------------------------------------------------------------
//
// 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)
//
//
// Class Description:
//
// Implementation of energy loss and delta-electron production
// by heavy slow charged particles using eveluated data

// -------------------------------------------------------------------
//

#ifndef G4BraggModel_h
#define G4BraggModel_h 1

#include "G4VEmModel.hh"

class G4BraggModel : public G4VEmModel
{

public:

  G4BraggModel(const G4ParticleDefinition* p = 0, const G4String& nam = "Bragg");

  ~G4BraggModel();

  void Initialise(const G4ParticleDefinition*, const G4DataVector&);

  G4double HighEnergyLimit(const G4ParticleDefinition*);

  G4double LowEnergyLimit(const G4ParticleDefinition*);

  void SetHighEnergyLimit(G4double e) {highKinEnergy = e;};

  void SetLowEnergyLimit(G4double e) {lowKinEnergy = e;};

  G4double MinEnergyCut(const G4ParticleDefinition*,
                        const G4MaterialCutsCouple*);

  G4bool IsInCharge(const G4ParticleDefinition*);

  G4double ComputeDEDX(const G4MaterialCutsCouple*,
                       const G4ParticleDefinition*,
                             G4double kineticEnergy,
                             G4double cutEnergy);

  G4double CrossSection(const G4MaterialCutsCouple*,
                        const G4ParticleDefinition*,
                              G4double kineticEnergy,
                              G4double cutEnergy,
                              G4double maxEnergy);

  G4DynamicParticle* SampleSecondary(
                                const G4MaterialCutsCouple*,
                                const G4DynamicParticle*,
                                      G4double tmin,
                                      G4double maxEnergy);

  std::vector<G4DynamicParticle*>* SampleSecondaries(
                                const G4MaterialCutsCouple*,
                                const G4DynamicParticle*,
                                      G4double tmin,
                                      G4double maxEnergy);

  G4double MaxSecondaryEnergy(const G4DynamicParticle*);

protected:

  G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
                                    G4double kinEnergy);

private:

  void SetParticle(const G4ParticleDefinition* p);

  // hide assignment operator
  G4BraggModel & operator=(const  G4BraggModel &right);
  G4BraggModel(const  G4BraggModel&);

  G4bool HasMaterial(const G4Material* material);

  G4double StoppingPower(const G4Material* material,
                               G4double kineticEnergy);

  G4double ElectronicStoppingPower(G4double z,
                                   G4double kineticEnergy) const;
 
  void SetMoleculaNumber(G4int number) {iMolecula = number;};

  G4double DEDX(const G4Material* material, G4double kineticEnergy);

  G4bool MolecIsInZiegler1988(const G4Material* material);

  G4double ChemicalFactor(G4double kineticEnergy, G4double eloss125) const;

  void SetExpStopPower125(G4double value) {expStopPower125 = value;};

  const G4ParticleDefinition* particle;
  G4double mass;
  G4double spin;
  G4double chargeSquare;
  G4double massRate;
  G4double ratio;
  G4double highKinEnergy;
  G4double lowKinEnergy;
  G4double protonMassAMU;
  G4double theZieglerFactor;
  G4double expStopPower125;        // Experimental Stopping power at 125keV

  G4int    iMolecula;          // index in the molecula's table
  G4bool   isIon;
};

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

inline G4double G4BraggModel::MaxSecondaryEnergy(
          const G4ParticleDefinition* pd,
                G4double kinEnergy)
{
  if(isIon) SetParticle(pd);
  G4double tau  = kinEnergy/mass;
  G4double tmax = 2.0*electron_mass_c2*tau*(tau + 2.) /
                  (1. + 2.0*(tau + 1.)*ratio + ratio*ratio);
  return tmax;
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

inline G4double G4BraggModel::MaxSecondaryEnergy(const G4DynamicParticle* dp)
{
  if(isIon) {
    mass =  dp->GetMass();
    ratio = electron_mass_c2/mass;
  }
  G4double tau  = dp->GetKineticEnergy()/mass;
  G4double tmax = 2.0*electron_mass_c2*tau*(tau + 2.) /
                  (1. + 2.0*(tau + 1.)*ratio + ratio*ratio);
  return tmax;
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

#endif