G4AdjointPhotoElectricModel.hh

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// $Id: G4AdjointPhotoElectricModel.hh 66892 2013-01-17 10:57:59Z gunter $
//
//      Module:   G4AdjointPhotoElectricModel
//  Author:         L. Desorgher
//  Organisation:   SpaceIT GmbH
//  Contract: ESA contract 21435/08/NL/AT
//  Customer:       ESA/ESTEC
//
// CHANGE HISTORY
// --------------
//      ChangeHistory: 
//    -1 September 2007 creation by L. Desorgher  
//    
//    -January 2009. L. Desorgher 
//     Put a higher limit on the CS to avoid a high rate of  Inverse Photo e- effect at low energy. The very high adjoint CS of the reverse 
//     photo electric reaction produce a high rate of reverse photo electric reaction in the inner side of a shielding for eaxmple, the correction of this occurence
//     by weight correction in the StepDoIt method is not statistically sufficient at small energy. The problem is partially solved by setting an higher CS limit 
//     and compensating it by an extra weight correction factor. However when  coupling it with other reverse  processes the reverse photo-electric is still 
//     the source of very occasional high weight that decrease the efficiency of the computation. A way to solve this problemn is still needed but is difficult
//     to find as it happens in rarea case but does give a weighrt that is outside the noemal distribution. (Very Tricky!)  
//    
//    -October 2009 Correction of Element sampling. L. Desorgher    
//
//-------------------------------------------------------------
//  Documentation:
//    Model for the adjoint photo electric process
//
#ifndef G4AdjointPhotoElectricModel_h
#define G4AdjointPhotoElectricModel_h 1


#include "globals.hh"
#include "G4VEmAdjointModel.hh"
#include "G4PEEffectFluoModel.hh"
class G4AdjointPhotoElectricModel: public G4VEmAdjointModel

{
public:

  G4AdjointPhotoElectricModel();
  ~G4AdjointPhotoElectricModel();
  
  
  
  virtual void SampleSecondaries(const G4Track& aTrack,
                                G4bool IsScatProjToProjCase,
        G4ParticleChange* fParticleChange);
  virtual G4double AdjointCrossSection(const G4MaterialCutsCouple* aCouple,
        G4double primEnergy,
        G4bool IsScatProjToProjCase);
  virtual G4double GetAdjointCrossSection(const G4MaterialCutsCouple* aCouple,
        G4double primEnergy,
        G4bool IsScatProjToProjCase);
          
  G4double AdjointCrossSectionPerAtom(const G4Element*  anElement,G4double electronEnergy);
  
  
  
  inline void SetTheDirectPEEffectModel(G4PEEffectFluoModel* aModel){theDirectPEEffectModel = aModel; 
                     DefineDirectEMModel(aModel);}              
  
  virtual void CorrectPostStepWeight(G4ParticleChange* fParticleChange, 
               G4double old_weight, 
             G4double adjointPrimKinEnergy, 
             G4double projectileKinEnergy,
             G4bool IsScatProjToProjCase);
  
  
private:
  G4double  xsec[40];
  G4double  totAdjointCS;
  G4double  totBiasedAdjointCS;
  G4double  factorCSBiasing;
  G4double  pre_step_AdjointCS;
  G4double  post_step_AdjointCS;
  
  
  G4double  shell_prob[40][40];
 
  
  G4PEEffectFluoModel* theDirectPEEffectModel;
  size_t index_element;
  G4double current_eEnergy;
  
  
private:  
  void DefineCurrentMaterialAndElectronEnergy(const G4MaterialCutsCouple* aCouple,
        G4double eEnergy);
    
};

#endif