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26 // -------------------------------------------------------------------
27 //
28 // Geant4 Class header file
29 //
30 // File name: G4PolarizedCompton
31 //
32 // Author: Andreas Schaelicke
33 // based on code by Michel Maire / Vladimir IVANTCHENKO
34 //
35 // Class description
36 // polarized version of Compton scattering
37 //
38 // -----------------------------------------------------------------------------
39
40 #ifndef PolarizedComptonScattering_h
41 #define PolarizedComptonScattering_h 1
42
43 #include "globals.hh"
44 #include "G4Gamma.hh"
45 #include "G4VEmProcess.hh"
46
47 class G4DynamicParticle;
48 class G4MaterialCutsCouple;
49 class G4ParticleDefinition;
50 class G4PolarizedComptonModel;
51
52 class G4PolarizedCompton : public G4VEmProcess
53
54 {
55 public:
56 explicit G4PolarizedCompton(const G4String& processName = "pol-compt",
57 G4ProcessType type = fElectromagnetic);
58
59 virtual ~G4PolarizedCompton() override;
60
61 // true for Gamma only.
62 virtual G4bool IsApplicable(const G4ParticleDefinition&) override;
63
64 virtual void ProcessDescription(std::ostream&) const override;
65 virtual void DumpInfo() const override { ProcessDescription(G4cout); };
66
67 void SetModel(const G4String& name);
68
69 G4PolarizedCompton& operator=(const G4PolarizedCompton& right) = delete;
70 G4PolarizedCompton(const G4PolarizedCompton&) = delete;
71
72 protected:
73 virtual void InitialiseProcess(const G4ParticleDefinition*) override;
74
75 virtual void BuildPhysicsTable(const G4ParticleDefinition&) override;
76
77 virtual G4double GetMeanFreePath(const G4Track& aTrack,
78 G4double previousStepSize,
79 G4ForceCondition* condition) override;
80
81 virtual G4double PostStepGetPhysicalInteractionLength(
82 const G4Track& track, G4double previousStepSize,
83 G4ForceCondition* condition) override;
84
85 private:
86 static G4PhysicsTable* theAsymmetryTable; // table for crosssection asymmetry
87 void CleanTable();
88
89 void BuildAsymmetryTable(const G4ParticleDefinition& part);
90
91 G4double ComputeAsymmetry(G4double energy, const G4MaterialCutsCouple* couple,
92 const G4ParticleDefinition& particle, G4double cut,
93 G4double& tAsymmetry);
94
95 G4double ComputeSaturationFactor(const G4Track& aTrack);
96
97 G4PolarizedComptonModel* fEmModel;
98
99 G4int fType;
100
101 G4bool fBuildAsymmetryTable;
102 G4bool fUseAsymmetryTable;
103
104 G4bool fIsInitialised;
105 };
106
107 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
108
109 #endif
110