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// $Id: G4PenelopePhotoElectric.hh,v 1.4 2006/06/29 19:36:35 gunter Exp $
// GEANT4 tag $Name: emlowen-V09-02-64 $
//
// Author: L.Pandola
//
// History:
// -----------
// 07 Jan  2003   L.Pandola   1st implementation
// 31 May  2005   L.Pandola   Added method to sample angular distribution
//                            of the final electron
// -------------------------------------------------------------------

// Class description:
// Low Energy Electromagnetic process, Photoelectric effect with
// Penelope model and tables
// -------------------------------------------------------------------

#ifndef G4PENELOPEPHOTOELECTRIC_HH
#define G4PENELOPEPHOTOELECTRIC_HH 1

#include "globals.hh"
#include "G4VDiscreteProcess.hh"
#include "G4AtomicDeexcitation.hh"

class G4Track;
class G4Step;
class G4ParticleDefinition;
class G4VParticleChange;
class G4VEMDataSet;
class G4VCrossSectionHandler;
class G4VRangeTest;

class G4PenelopePhotoElectric : public G4VDiscreteProcess {
  
public:
  
  G4PenelopePhotoElectric(const G4String& processName ="PenPhotoElec");
  
  ~G4PenelopePhotoElectric();

  G4bool IsApplicable(const G4ParticleDefinition&);
  
  void BuildPhysicsTable(const G4ParticleDefinition& photon);
 
  G4VParticleChange* PostStepDoIt(const G4Track& aTrack, const G4Step& aStep);

  void SetCutForLowEnSecPhotons(G4double);

  void SetCutForLowEnSecElectrons(G4double);

  void ActivateAuger(G4bool);

  // For testing purpose only
  G4double DumpMeanFreePath(const G4Track& aTrack, 
			    G4double previousStepSize, 
			    G4ForceCondition* condition) 
  { return GetMeanFreePath(aTrack, previousStepSize, condition); }

protected:  

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

private:

 // Hide copy constructor and assignment operator as private 
  G4PenelopePhotoElectric& operator=(const G4PenelopePhotoElectric& right);
  G4PenelopePhotoElectric(const G4PenelopePhotoElectric& );

  G4double SampleElectronDirection(G4double);

  G4double lowEnergyLimit;  // low energy limit  applied to the process
  G4double highEnergyLimit; // high energy limit applied to the process

  G4VEMDataSet* meanFreePathTable;

  G4VCrossSectionHandler* crossSectionHandler;
  G4VCrossSectionHandler* shellCrossSectionHandler;

  G4VRangeTest* rangeTest;

  const G4double intrinsicLowEnergyLimit; // intrinsic validity range
  const G4double intrinsicHighEnergyLimit;

  G4double cutForLowEnergySecondaryPhotons;
  G4double cutForLowEnergySecondaryElectrons;

  G4AtomicDeexcitation deexcitationManager;
};

#endif