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// $Id: G4MuBremsstrahlungModel.hh,v 1.17 2007/10/11 09:25:31 vnivanch Exp $
// GEANT4 tag $Name: geant4-09-01-patch-02 $
//
// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
//
// File name:     G4MuBremsstrahlungModel
//
// Author:        Vladimir Ivanchenko on base of Laszlo Urban code
// 
// Creation date: 18.05.2002
//
// Modifications:
//
// 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
// 27-01-03 Make models region aware (V.Ivanchenko)
// 13-02-03 Add name (V.Ivanchenko)
// 10-02-04 Add lowestKinEnergy (V.Ivanchenko)
// 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
// 13-02-06 add ComputeCrossSectionPerAtom (mma)
// 11-10-07 Add ignoreCut flag (V.Ivanchenko) 
//

//
// Class Description:
//
// Implementation of energy loss for gamma emission by muons

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

#ifndef G4MuBremsstrahlungModel_h
#define G4MuBremsstrahlungModel_h 1

#include "G4VEmModel.hh"

class G4Element;
class G4ParticleChangeForLoss;

class G4MuBremsstrahlungModel : public G4VEmModel
{

public:

  G4MuBremsstrahlungModel(const G4ParticleDefinition* p = 0,
                          const G4String& nam = "MuBrem");

  virtual ~G4MuBremsstrahlungModel();

  void SetParticle(const G4ParticleDefinition*);

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

  void SetLowestKineticEnergy(G4double e) {lowestKinEnergy = e;};

  G4double MinEnergyCut(const G4ParticleDefinition*,
                        const G4MaterialCutsCouple*);
			      
  virtual G4double ComputeCrossSectionPerAtom(
				 const G4ParticleDefinition*,
				 G4double kineticEnergy,
				 G4double Z, G4double A,
				 G4double cutEnergy,
				 G4double maxEnergy);
				 
  virtual G4double CrossSectionPerVolume(const G4Material*,
                         const G4ParticleDefinition*,
                               G4double kineticEnergy,
                               G4double cutEnergy,
                               G4double maxEnergy);
			       
  virtual G4double ComputeDEDXPerVolume(const G4Material*,
                                const G4ParticleDefinition*,
                                G4double kineticEnergy,
                                G4double cutEnergy);
			      
  void SampleSecondaries(std::vector<G4DynamicParticle*>*,
			 const G4MaterialCutsCouple*,
			 const G4DynamicParticle*,
			 G4double tmin,
			 G4double maxEnergy);

protected:

  G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
			      G4double kineticEnergy);

public:

 G4double ComputMuBremLoss(G4double Z, G4double A, G4double tkin, G4double cut);

 G4double ComputeMicroscopicCrossSection(G4double tkin,
                                           G4double Z,
                                           G4double A,
                                           G4double cut);

 G4double ComputeDMicroscopicCrossSection(G4double tkin,
                                          G4double Z,
                                          G4double A,
                                          G4double gammaEnergy);

  inline void SetIgnoreCutFlag(G4bool);

  inline G4bool IgnoreCutFlag() const;

private:

 G4DataVector* ComputePartialSumSigma(const G4Material* material,
				      G4double tkin, G4double cut);

 const G4Element* SelectRandomAtom(const G4MaterialCutsCouple* couple) const;

 void MakeSamplingTables();


  // hide assignment operator
  G4MuBremsstrahlungModel & operator=(const  G4MuBremsstrahlungModel &right);
  G4MuBremsstrahlungModel(const  G4MuBremsstrahlungModel&);

  G4ParticleDefinition*       theGamma;
  const G4ParticleDefinition* particle;
  G4ParticleChangeForLoss*    fParticleChange;

  G4double highKinEnergy;
  G4double lowKinEnergy;
  G4double lowestKinEnergy;
  G4double minThreshold;
  G4double mass;

  // tables for sampling
  G4int nzdat,ntdat,NBIN;
  static G4double zdat[5],adat[5],tdat[8];
  G4double ya[1001], proba[5][8][1001];
  G4double cutFixed;

  G4bool  ignoreCut;

  std::vector<G4DataVector*> partialSumSigma;
  G4bool  samplingTablesAreFilled;

};

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

inline G4double G4MuBremsstrahlungModel::MaxSecondaryEnergy(
                                 const G4ParticleDefinition*,
				 G4double kineticEnergy)
{
  return kineticEnergy;
}

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

inline void G4MuBremsstrahlungModel::SetIgnoreCutFlag(G4bool val)
{
  ignoreCut = val;
}

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

inline G4bool G4MuBremsstrahlungModel::IgnoreCutFlag() const
{
  return ignoreCut;
}

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

#endif