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25 //
26 //
27 //
28 // ------------------------------------------------------------
29 // GEANT 4 class header file
30 // CERN Geneva Switzerland
31 //
32
33 // --------- G4LowEnergyPolarizedCompton class -----
34 //
35 // by G.Depaola & F.Longo (21 may 2001)
36 // 24 May 2001 - MGP Modified to inherit from G4VDiscreteProcess
37 // 25 May 2001 - MGP Added protections to avoid crashes
38 //
39 // 17 October 2001 - F.Longo Major revision according to design iteration
40 //
41 // 21 February 2002 - F.Longo Revisions with A.Zoglauer and G.Depaola
42 // - better description of parallelism
43 // - system of ref change method improved
44 //
45 //
46 // Class description:
47 // Low Energy electromagnetic process, Polarised Compton scattering
48 // Further documentation available from http://www.ge.infn.it/geant4/lowE
49
50 // ------------------------------------------------------------
51
52 #ifndef G4RDLOWENERGYPOLARIZEDCOMPTON_H
53 #define G4RDLOWENERGYPOLARIZEDCOMPTON_H 1
54
55 #include "globals.hh"
56 #include "G4VDiscreteProcess.hh"
57
58 // Doppler Broadening
59
60 #include "G4RDShellData.hh"
61 #include "G4RDDopplerProfile.hh"
62
63
64 class G4Track;
65 class G4Step;
66 class G4ParticleDefinition;
67 class G4VParticleChange;
68 class G4RDVEMDataSet;
69 class G4RDVCrossSectionHandler;
70 class G4RDVRangeTest;
71
72 class G4LowEnergyPolarizedCompton : public G4VDiscreteProcess
73 {
74 public:
75
76 G4LowEnergyPolarizedCompton(const G4String& processName = "polarLowEnCompt");
77
78 ~G4LowEnergyPolarizedCompton();
79
80 G4bool IsApplicable(const G4ParticleDefinition& definition);
81
82 void BuildPhysicsTable(const G4ParticleDefinition& photon);
83 G4VParticleChange* PostStepDoIt(const G4Track& aTrack, const G4Step& aStep);
84
85
86 // For testing purpose only
87 G4double DumpMeanFreePath(const G4Track& aTrack,
88 G4double previousStepSize,
89 G4ForceCondition* condition)
90 { return GetMeanFreePath(aTrack, previousStepSize, condition); }
91
92
93 protected:
94
95 G4double GetMeanFreePath(const G4Track& aTrack,
96 G4double previousStepSize,
97 G4ForceCondition* condition);
98 private:
99
100 // Hide copy constructor and assignment operator as private
101
102 G4LowEnergyPolarizedCompton& operator=(const G4LowEnergyPolarizedCompton&
103 right);
104 G4LowEnergyPolarizedCompton(const G4LowEnergyPolarizedCompton& );
105
106 G4double lowEnergyLimit; // low energy limit applied to the process
107 G4double highEnergyLimit; // high energy limit applied to the process
108
109 G4RDVEMDataSet* meanFreePathTable;
110 G4RDVEMDataSet* scatterFunctionData;
111
112 G4RDVCrossSectionHandler* crossSectionHandler;
113 G4RDVRangeTest* rangeTest;
114
115 const G4double intrinsicLowEnergyLimit; // intrinsic validity range
116 const G4double intrinsicHighEnergyLimit;
117
118 // specific methods for polarization
119
120 G4ThreeVector GetRandomPolarization(G4ThreeVector& direction0); // Random Polarization
121 G4ThreeVector GetPerpendicularPolarization(const G4ThreeVector& direction0, const G4ThreeVector& polarization0) const;
122
123 G4ThreeVector SetPerpendicularVector(G4ThreeVector& a); // temporary
124 G4ThreeVector SetNewPolarization(G4double epsilon, G4double sinSqrTheta,
125 G4double phi, G4double cosTheta);
126 G4double SetPhi(G4double, G4double);
127
128 void SystemOfRefChange(G4ThreeVector& direction0, G4ThreeVector& direction1,
129 G4ThreeVector& polarization0, G4ThreeVector& polarization1);
130
131 // Doppler Broadening
132
133 G4RDShellData shellData;
134 G4RDDopplerProfile profileData;
135
136
137 };
138
139 #endif
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