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// $Id: G4MuPairProduction52.hh,v 1.1 2003/08/08 11:28:40 vnivanch Exp $
// GEANT4 tag $Name: geant4-06-00 $
//
//--------------- G4MuPairProduction52 physics process ------------------
//                by Laszlo Urban, May 1998      
//------------------------------------------------------------------------------
// 10-02-00 modifications , new e.m. structure, L.Urban
// 10-08-01 new methods Store/Retrieve PhysicsTable (mma)
// 29-10-01 all static functions no more inlined (mma) 
// 16-01-03 Migrade to cut per region (V.Ivanchenko)
// 08-08-03 This class is frozen at the release 5.2 (V.Ivanchenko)
//------------------------------------------------------------------------------

#ifndef G4MuPairProduction52_h
#define G4MuPairProduction52_h 1

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

#include "G4ios.hh"
#include "globals.hh"
#include "Randomize.hh"
#include "G4VMuEnergyLoss.hh"
#include "G4Track.hh"
#include "G4Step.hh"
#include "G4OrderedTable.hh"
#include "G4PhysicsTable.hh"
#include "G4PhysicsLogVector.hh"
#include "G4MaterialCutsCouple.hh"

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

class G4MuPairProduction52 : public G4VMuEnergyLoss

{
  public:

     G4MuPairProduction52(const G4String& processName = "MuPairProd");

    ~G4MuPairProduction52();

     G4bool IsApplicable(const G4ParticleDefinition&);

     void BuildPhysicsTable(const G4ParticleDefinition& ParticleType);

     void BuildLossTable(const G4ParticleDefinition& ParticleType);

     void BuildLambdaTable(const G4ParticleDefinition& ParticleType);

     void PrintInfoDefinition();

     G4double GetMeanFreePath( const G4Track& track,
                               G4double previousStepSize,
                               G4ForceCondition* condition );

     G4VParticleChange *PostStepDoIt(const G4Track& track,
                                     const G4Step& Step  );

     G4double GetDMicroscopicCrossSection(
                                      const G4ParticleDefinition* ParticleType,
                                      G4double KineticEnergy,
                                      G4double AtomicNumber,
                                      G4double PairEnergy);

     G4bool StorePhysicsTable(G4ParticleDefinition* ,
  		              const G4String& directory, G4bool);
      // store eLoss and MeanFreePath tables into an external file
      // specified by 'directory' (must exist before invokation)

     G4bool RetrievePhysicsTable(G4ParticleDefinition* ,
			         const G4String& directory, G4bool);
      // retrieve eLoss and MeanFreePath tables from an external file
      // specified by 'directory'

  protected:

     G4double ComputeMeanFreePath(const G4ParticleDefinition* ParticleType,
                                        G4double KineticEnergy,
                                  const G4MaterialCutsCouple* couple);

     void ComputePartialSumSigma(const G4ParticleDefinition* ParticleType,
                                       G4double KineticEnergy,
                                 const G4MaterialCutsCouple* couple);

     virtual G4double ComputeMicroscopicCrossSection(
                                      const G4ParticleDefinition* ParticleType,
                                      G4double KineticEnergy,
                                      G4double AtomicNumber,
                                      G4double ElectronEnergyCut,
                                      G4double PositronEnergyCut);

     G4double ComputeDDMicroscopicCrossSection(
                                      const G4ParticleDefinition* ParticleType,
                                      G4double KineticEnergy,
                                      G4double AtomicNumber,
                                      G4double PairEnergy,
                                      G4double asymmetry);

     G4double ComputeDMicroscopicCrossSection(
                                      const G4ParticleDefinition* ParticleType,
                                      G4double KineticEnergy,
                                      G4double AtomicNumber,
                                      G4double PairEnergy);

  private:

     G4MuPairProduction52 & operator=(const G4MuPairProduction52 &right);
     G4MuPairProduction52(const G4MuPairProduction52&);

     G4double ComputePairLoss( const G4ParticleDefinition* ParticleType,
                               G4double Z,G4double T,G4double ElectronCut,
                                     G4double PositronCut);

     G4Element* SelectRandomAtom(const G4MaterialCutsCouple* couple) const;

     void MakeSamplingTables( const G4ParticleDefinition* ParticleType );

  protected:

     virtual G4double SecondaryEnergyThreshold(size_t index);
  
  private:

     G4PhysicsTable* theMeanFreePathTable;

     G4OrderedTable PartialSumSigma;

     static G4double LowerBoundLambda; // bining for lambda table
     static G4double UpperBoundLambda;
     static G4int    NbinLambda;
     G4double LowestKineticEnergy,HighestKineticEnergy;
     G4int    TotBin;

     const std::vector<G4double>* electronEnergyCuts;
     const std::vector<G4double>* positronEnergyCuts;

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

  public:

    static void SetLowerBoundLambda(G4double val);
    static void SetUpperBoundLambda(G4double val);
    static void SetNbinLambda(G4int n);
    static G4double GetLowerBoundLambda();
    static G4double GetUpperBoundLambda();
    static G4int GetNbinLambda();

};

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

#include "G4MuPairProduction52.icc"

#endif