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// $Id: G4PhotoElectricEffect52.hh,v 1.2 2006/06/29 19:50:52 gunter Exp $
// GEANT4 tag $Name: geant4-08-02 $
//
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//
// 12-06-96, Added SelectRandomAtom() method and new data member
//           for cumulative total cross section, by M.Maire
// 21-06-96, SetCuts implementation, M.Maire
// 17-09-96, Dynamic array PartialSumSigma
//           split ComputeBindingEnergy(), M.Maire
// 08-01-97, crossection table + meanfreepath table, M.Maire
// 13-03-97, adapted for the new physics scheme, M.Maire
// 13-08-98, new methods SetBining() PrintInfo()
// 17-11-98, use table of atomic shells in PostStepDoIt, mma
// 06-01-99, Sandia crossSection below 50 keV, V.Grichine mma
// 03-08-01, new methods Store/Retrieve PhysicsTable (mma)
// 06-08-01, BuildThePhysicsTable() called from constructor (mma)
// 19-09-01, come back to previous process name "phot"
// 20-09-01, DoIt: fminimalEnergy = 1*eV (mma)
// 01-10-01, come back to BuildPhysicsTable(const G4ParticleDefinition&)
// 10-01-02, moved few function from icc to cc
// 17-04-02, Keep only Sandia crossSections. Remove BuildPhysicsTables.
//           Simplify public interface (mma)
// 29-04-02, Generate theta angle of the photoelectron from Sauter-Gavrila
//           distribution (mma)
// 13-08-04, suppress icc file; make public ComputeCrossSectionPerAtom()  (mma)
// 04-05-05, Add 52 to class name (V.Ivanchenko)
// 
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// class description
//
// inherit from G4VDiscreteProcess
//

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#ifndef G4PhotoElectricEffect52_h
#define G4PhotoElectricEffect52_h 1

#include "G4ios.hh" 
#include "globals.hh"
#include "Randomize.hh" 
#include "G4VDiscreteProcess.hh"
#include "G4PhysicsTable.hh"
#include "G4PhysicsLogVector.hh"
#include "G4ElementTable.hh"
#include "G4Gamma.hh" 
#include "G4Electron.hh"
#include "G4Step.hh" 

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class G4PhotoElectricEffect52 : public G4VDiscreteProcess
 
{
  public:  // with description
 
     G4PhotoElectricEffect52(const G4String& processName ="phot",
		                 G4ProcessType type = fElectromagnetic);
 
    ~G4PhotoElectricEffect52();

     G4bool IsApplicable(const G4ParticleDefinition&);
      // true for Gamma only.
           
     void PrintInfoDefinition();
      // Print few lines of informations about the process.
     
     G4double GetMeanFreePath(const G4Track& aTrack,
                                    G4double previousStepSize,
                                    G4ForceCondition* condition);
       // It returns the MeanFreePath of the process for the current track :
       // (energy, material)
       // The previousStepSize and G4ForceCondition* are not used.
       // This function overloads a virtual function of the base class.
       // It is invoked by the ProcessManager of the Particle.
       
   
     G4VParticleChange* PostStepDoIt(const G4Track& aTrack,
                                     const G4Step&  aStep);
       // It computes the final state of the process (at end of step),
       // returned as a ParticleChange object.			    
       // This function overloads a virtual function of the base class.
       // It is invoked by the ProcessManager of the Particle.
        
  public:  // with description
  
       // utilities to access the cross Section and mean free path:
	   	  
     virtual
     G4double ComputeCrossSectionPerAtom(G4double PhotonEnergy, 
                                         G4double AtomicNumber);
		 
     virtual
     G4double ComputeMeanFreePath(G4double PhotonEnergy, 
                                  G4Material* aMaterial);
				  
  protected:
     virtual
     G4double ElecThetaDistribution(G4double ElecKineEnergy);				  

  private:

     G4Element* SelectRandomAtom(const G4DynamicParticle* aDynamicPhoton,
                                 G4Material* aMaterial);
  private:
  
     // hide assignment operator as private 
     G4PhotoElectricEffect52& operator=(const G4PhotoElectricEffect52 &right);
     G4PhotoElectricEffect52(const G4PhotoElectricEffect52& );
       
  private:
  
     G4double fminimalEnergy;      // minimalEnergy of produced particles
     
     G4double MeanFreePath;        // actual Mean Free Path (current medium)
};

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#endif