physics/include/G4LowEnergyPolarizedCompton.hh

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0025 //
0026 //
0027 //
0028 // ------------------------------------------------------------
0029 //      GEANT 4 class header file
0030 //      CERN Geneva Switzerland
0031 //
0032
0033 // --------- G4LowEnergyPolarizedCompton class -----
0034 //
0035 //           by G.Depaola & F.Longo (21 may 2001)
0036 // 24 May 2001 - MGP      Modified to inherit from G4VDiscreteProcess
0037 // 25 May 2001 - MGP      Added protections to avoid crashes
0038 //
0039 // 17 October 2001 - F.Longo  Major revision according to design iteration
0040 //
0041 // 21 February 2002 - F.Longo Revisions with A.Zoglauer and G.Depaola
0042 //                            - better description of parallelism
0043 //                            - system of ref change method improved
0044 //
0045 //
0046 // Class description:
0047 // Low Energy electromagnetic process, Polarised Compton scattering
0048 // Further documentation available from http://www.ge.infn.it/geant4/lowE
0049
0050 // ------------------------------------------------------------
0051
0052 #ifndef G4RDLOWENERGYPOLARIZEDCOMPTON_H
0053 #define G4RDLOWENERGYPOLARIZEDCOMPTON_H 1
0054
0055 #include "globals.hh"
0056 #include "G4VDiscreteProcess.hh"
0057
0058 // Doppler Broadening
0059
0060 #include "G4RDShellData.hh"
0061 #include "G4RDDopplerProfile.hh"
0062
0063
0064 class G4Track;
0065 class G4Step;
0066 class G4ParticleDefinition;
0067 class G4VParticleChange;
0068 class G4RDVEMDataSet;
0069 class G4RDVCrossSectionHandler;
0070 class G4RDVRangeTest;
0071
0072 class G4LowEnergyPolarizedCompton : public  G4VDiscreteProcess
0073 {
0074 public:
0075
0076   G4LowEnergyPolarizedCompton(const G4String& processName = "polarLowEnCompt");
0077
0078   ~G4LowEnergyPolarizedCompton();
0079
0080   G4bool IsApplicable(const G4ParticleDefinition& definition);
0081
0082   void BuildPhysicsTable(const G4ParticleDefinition& photon);
0083   G4VParticleChange* PostStepDoIt(const G4Track& aTrack, const G4Step& aStep);
0084
0085
0086   // For testing purpose only
0087   G4double DumpMeanFreePath(const G4Track& aTrack,
0088                 G4double previousStepSize,
0089                 G4ForceCondition* condition)
0090   { return GetMeanFreePath(aTrack, previousStepSize, condition); }
0091
0092
0093 protected:
0094
0095   G4double GetMeanFreePath(const G4Track& aTrack,
0096                G4double previousStepSize,
0097                G4ForceCondition* condition);
0098 private:
0099
0100   // Hide copy constructor and assignment operator as private
0101
0102   G4LowEnergyPolarizedCompton& operator=(const G4LowEnergyPolarizedCompton&
0103                      right);
0104   G4LowEnergyPolarizedCompton(const G4LowEnergyPolarizedCompton& );
0105
0106   G4double lowEnergyLimit;  // low energy limit  applied to the process
0107   G4double highEnergyLimit; // high energy limit applied to the process
0108
0109   G4RDVEMDataSet* meanFreePathTable;
0110   G4RDVEMDataSet* scatterFunctionData;
0111
0112   G4RDVCrossSectionHandler* crossSectionHandler;
0113   G4RDVRangeTest* rangeTest;
0114
0115   const G4double intrinsicLowEnergyLimit; // intrinsic validity range
0116   const G4double intrinsicHighEnergyLimit;
0117
0118   // specific methods for polarization
0119
0120   G4ThreeVector GetRandomPolarization(G4ThreeVector& direction0); // Random Polarization
0121   G4ThreeVector GetPerpendicularPolarization(const G4ThreeVector& direction0, const G4ThreeVector& polarization0) const;
0122
0123   G4ThreeVector SetPerpendicularVector(G4ThreeVector& a); // temporary
0124   G4ThreeVector SetNewPolarization(G4double epsilon, G4double sinSqrTheta,
0125                    G4double phi, G4double cosTheta);
0126   G4double SetPhi(G4double, G4double);
0127
0128   void SystemOfRefChange(G4ThreeVector& direction0, G4ThreeVector& direction1,
0129              G4ThreeVector& polarization0, G4ThreeVector& polarization1);
0130
0131   // Doppler Broadening
0132
0133   G4RDShellData shellData;
0134   G4RDDopplerProfile profileData;
0135
0136
0137 };
0138
0139 #endif
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