physics/include/G4LowEnergyGammaConversion.hh

0001 //
0002 // ********************************************************************
0003 // * License and Disclaimer                                           *
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0017 // *                                                                  *
0018 // * This  code  implementation is the result of  the  scientific and *
0019 // * technical work of the GEANT4 collaboration.                      *
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0021 // * any work based  on the software)  you  agree  to acknowledge its *
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0023 // * acceptance of all terms of the Geant4 Software license.          *
0024 // ********************************************************************
0025 //
0026 //
0027 //
0028 // Author: A. Forti
0029 //         Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
0030 //
0031 // History:
0032 // -----------
0033 // 02 Mar 1999   A. Forti   1st implementation
0034 // 14 Aug 2001   MGP        Major revision according to a design iteration
0035 //
0036 // -------------------------------------------------------------------
0037
0038 // Class description:
0039 // Low Energy process, Photon conversion
0040 // Further documentation available from http://www.ge.infn.it/geant4/lowE
0041
0042 // -------------------------------------------------------------------
0043
0044 #ifndef G4RDLOWENERGYGAMMACONVERSION_HH
0045 #define G4RDLOWENERGYGAMMACONVERSION_HH 1
0046
0047
0048 #include "G4VDiscreteProcess.hh"
0049
0050 #include "globals.hh"
0051 #include "G4VDiscreteProcess.hh"
0052 class G4Track;
0053 class G4Step;
0054 class G4ParticleDefinition;
0055 class G4VParticleChange;
0056 class G4RDVEMDataSet;
0057 class G4RDVCrossSectionHandler;
0058 class G4RDVRangeTest;
0059
0060 class G4LowEnergyGammaConversion : public G4VDiscreteProcess {
0061
0062 public:
0063
0064   G4LowEnergyGammaConversion(const G4String& processName ="LowEnConversion");
0065
0066   ~G4LowEnergyGammaConversion();
0067
0068   G4bool IsApplicable(const G4ParticleDefinition& photon);
0069
0070   void BuildPhysicsTable(const G4ParticleDefinition& photon);
0071
0072
0073   G4VParticleChange* PostStepDoIt(const G4Track& aTrack, const G4Step& aStep);
0074
0075   // For testing purpose only
0076   G4double DumpMeanFreePath(const G4Track& aTrack,
0077                 G4double previousStepSize,
0078                 G4ForceCondition* condition)
0079   { return GetMeanFreePath(aTrack, previousStepSize, condition); }
0080
0081 protected:
0082
0083   G4double GetMeanFreePath(const G4Track& aTrack,
0084                G4double previousStepSize,
0085                G4ForceCondition* condition);
0086
0087 private:
0088
0089   // Hide copy constructor and assignment operator as private
0090   G4LowEnergyGammaConversion& operator=(const G4LowEnergyGammaConversion &right);
0091   G4LowEnergyGammaConversion(const G4LowEnergyGammaConversion& );
0092
0093   G4double ScreenFunction1(G4double screenVariable);
0094   G4double ScreenFunction2(G4double screenVariable);
0095
0096   G4double lowEnergyLimit;  // low energy limit  applied to the process
0097   G4double highEnergyLimit; // high energy limit applied to the process
0098
0099   G4RDVEMDataSet* meanFreePathTable;
0100   G4RDVCrossSectionHandler* crossSectionHandler;
0101
0102   G4RDVRangeTest* rangeTest;
0103
0104   const G4double intrinsicLowEnergyLimit; // intrinsic validity range
0105   const G4double intrinsicHighEnergyLimit;
0106
0107   const G4double smallEnergy;
0108
0109 };
0110
0111 #endif
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