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// $Id: G4MuBremsstrahlungModel.hh,v 1.8 2003/07/21 12:52:35 vnivanch Exp $
// GEANT4 tag $Name: geant4-06-00 $
//
// -------------------------------------------------------------------
//
// 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)
//

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

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

#ifndef G4MuBremsstrahlungModel_h
#define G4MuBremsstrahlungModel_h 1

#include "G4VEmModel.hh"

class G4Element;

class G4MuBremsstrahlungModel : public G4VEmModel
{

public:

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

  ~G4MuBremsstrahlungModel();

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

  G4double HighEnergyLimit(const G4ParticleDefinition* p);

  G4double LowEnergyLimit(const G4ParticleDefinition* p);

  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);

  virtual G4double MaxSecondaryEnergy(
				const G4DynamicParticle* dynParticle);
protected:

  virtual G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
    				            G4double kineticEnergy);

private:

  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);

  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&);

  G4double highKinEnergy;
  G4double lowKinEnergy;
  G4double minThreshold;

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

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

};

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

inline
G4double G4MuBremsstrahlungModel::MaxSecondaryEnergy(
				 const G4DynamicParticle* dynParticle)
{
  return dynParticle->GetKineticEnergy();
} 

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

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

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


#endif