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// $Id: G4BraggIonModel.hh,v 1.4 2005/05/12 11:06:42 vnivanch Exp $
// GEANT4 tag $Name: geant4-07-01 $
//
// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
//
// File name:     G4BraggIonModel
//
// Author:        Vladimir Ivanchenko
//
// Creation date: 13.10.2004
//
// Modifications:
// 09-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko)
// 11-05-05 Major optimisation of internal interfaces (V.Ivantchenko)
//
// Class Description:
//
// Implementation of energy loss and delta-electron production
// by heavy slow charged particles using eveluated data

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

#ifndef G4BraggIonModel_h
#define G4BraggIonModel_h 1

#include "G4VEmModel.hh"

class G4ParticleChangeForLoss;

class G4BraggIonModel : public G4VEmModel
{

public:

  G4BraggIonModel(const G4ParticleDefinition* p = 0, const G4String& nam = "BraggIon");

  virtual ~G4BraggIonModel();

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

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

  virtual G4double ComputeDEDXPerVolume(const G4Material*,
					const G4ParticleDefinition*,
					G4double kineticEnergy,
					G4double cutEnergy);

  virtual G4double CrossSectionPerVolume(const G4Material*,
					 const G4ParticleDefinition*,
					 G4double kineticEnergy,
					 G4double cutEnergy,
					 G4double maxEnergy);

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

protected:

  G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
			      G4double kinEnergy);

private:

  void SetParticle(const G4ParticleDefinition* p);

  G4double HeEffChargeSquare(G4double z, G4double kinEnergyInMeV) const;

  // hide assignment operator
  G4BraggIonModel & operator=(const  G4BraggIonModel &right);
  G4BraggIonModel(const  G4BraggIonModel&);

  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);

  const G4ParticleDefinition* particle;
  G4ParticleDefinition*       theElectron;
  G4ParticleChangeForLoss*    fParticleChange;

  G4double mass;
  G4double spin;
  G4double chargeSquare;
  G4double massRate;
  G4double ratio;
  G4double highKinEnergy;
  G4double lowKinEnergy;
  G4double lowestKinEnergy;
  G4double HeMass;
  G4double massFactor;
  G4double rateMassHe2p;
  G4double theZieglerFactor;

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

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

inline G4double G4BraggIonModel::MaxSecondaryEnergy(
          const G4ParticleDefinition* pd,
                G4double kinEnergy)
{
  if(pd != particle) 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 void G4BraggIonModel::SetParticle(const G4ParticleDefinition* p)
{
  particle = p;
  mass = particle->GetPDGMass();
  spin = particle->GetPDGSpin();
  G4double q   = particle->GetPDGCharge()/eplus;
  chargeSquare = q*q;
  massRate     = mass/proton_mass_c2;
  ratio        = electron_mass_c2/mass;
}

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

#endif