G4PenelopeGammaConversionModel.hh

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//
// Author: Luciano Pandola
//
// History:
// -----------
// 13 Jan 2010   L. Pandola  First implementation
// 24 May 2011   L. Pandola  Renamed (make v2008 as default Penelope)
// 18 Sep 2013   L. Pandola  Migration to MT paradigm
// 04 Mar 2021   L. Pandola  Replace map with static array
//
// -------------------------------------------------------------------
//
// Class description:
// Low Energy Electromagnetic Physics, Gamma Conversion 
// with Penelope Model, version 2008
// -------------------------------------------------------------------
 
#ifndef G4PENELOPEGAMMACONVERSIONMODEL_HH
#define G4PENELOPEGAMMACONVERSIONMODEL_HH 1
 
#include "globals.hh"
#include "G4VEmModel.hh"
#include "G4DataVector.hh"
#include "G4ParticleChangeForGamma.hh"
 
class G4ParticleDefinition;
class G4DynamicParticle;
class G4MaterialCutsCouple;
class G4Material;
class G4PhysicsFreeVector;
 
class G4PenelopeGammaConversionModel : public G4VEmModel 
{
public:
  explicit G4PenelopeGammaConversionModel(const G4ParticleDefinition* p=nullptr,
                      const G4String& processName ="PenConversion");
  
  virtual ~G4PenelopeGammaConversionModel();
 
  void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;
  void InitialiseLocal(const G4ParticleDefinition*, G4VEmModel*) override; 
  G4double ComputeCrossSectionPerAtom(
                      const G4ParticleDefinition*,
                      G4double kinEnergy,
                      G4double Z,
                      G4double A=0,
                      G4double cut=0,
                      G4double emax=DBL_MAX) override;
 
  void SampleSecondaries(std::vector<G4DynamicParticle*>*,
             const G4MaterialCutsCouple*,
             const G4DynamicParticle*,
             G4double tmin,
             G4double maxEnergy) override;
  
  void SetVerbosityLevel(G4int lev){fVerboseLevel = lev;};
  G4int GetVerbosityLevel(){return fVerboseLevel;};
 
  G4PenelopeGammaConversionModel & operator=(const 
                         G4PenelopeGammaConversionModel &right) = delete;
  G4PenelopeGammaConversionModel(const G4PenelopeGammaConversionModel&) = delete;
 
protected:
  G4ParticleChangeForGamma* fParticleChange;
  const G4ParticleDefinition* fParticle;
 
private:
  void SetParticle(const G4ParticleDefinition*);
  void ReadDataFile(const G4int Z);
  void InitializeScreeningFunctions(const G4Material*);
  std::pair<G4double,G4double> GetScreeningFunctions(G4double); 
 
  //Effective (scalar) properties attached to materials:
  // effective charge
  std::map<const G4Material*,G4double> *fEffectiveCharge;
  // 2/Rs (Rs = screening radius), BCB array in Penelope
  std::map<const G4Material*,G4double> *fMaterialInvScreeningRadius;
  // Parameters of screening functions
  std::map<const G4Material*,std::pair<G4double,G4double> > *fScreeningFunction;
 
  static const G4int fMaxZ =99;
  static G4PhysicsFreeVector* fLogAtomicCrossSection[fMaxZ+1];
  //Z range is 1-99
  static G4double fAtomicScreeningRadius[fMaxZ+1];
 
  //Intrinsic energy limits of the model: cannot be extended by the parent process
  G4double fIntrinsicLowEnergyLimit;
  G4double fIntrinsicHighEnergyLimit;
 
  //Use a quicker sampling algorithm if E < smallEnergy
  G4double fSmallEnergy;  
  G4int fVerboseLevel;
  G4bool fIsInitialised;
 
  //Used only for G4EmCalculator and Unit Tests
  G4bool fLocalTable;
};
 
 
 
#endif