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25 //
26 //
27 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class header file
30 //
31 //
32 // File name: G4PAIPhotModel
33 //
34 // Author: V. Grichine based on G4PAIModel code for MT
35 //
36 // Creation date: 07.10.2013
37 //
38 //
39 // Class Description:
40 //
41 // Implementation of PAI photon model of energy loss and
42 // delta-electron or X-ray production by charged particles in MT framework
43 //
44 // -------------------------------------------------------------------
45 //
46
47 #ifndef G4PAIPhotModel_h
48 #define G4PAIPhotModel_h 1
49
50 #include <CLHEP/Units/PhysicalConstants.h>
51
52 #include "G4VEmModel.hh"
53 #include "G4VEmFluctuationModel.hh"
54 #include "globals.hh"
55 #include <vector>
56
57 class G4Region;
58 class G4MaterialCutsCouple;
59 class G4ParticleChangeForLoss;
60
61 class G4PAIPhotData;
62
63 class G4PAIPhotModel final : public G4VEmModel, public G4VEmFluctuationModel
64 {
65
66 public:
67
68 explicit G4PAIPhotModel(const G4ParticleDefinition* p = nullptr,
69 const G4String& nam = "PAI");
70
71 ~G4PAIPhotModel() final;
72
73 void Initialise(const G4ParticleDefinition*, const G4DataVector&) final;
74
75 void InitialiseLocal(const G4ParticleDefinition*,
76 G4VEmModel* masterModel) final;
77
78 G4double MinEnergyCut(const G4ParticleDefinition*,
79 const G4MaterialCutsCouple* couple) final;
80
81 G4double ComputeDEDXPerVolume(const G4Material*,
82 const G4ParticleDefinition*,
83 G4double kineticEnergy,
84 G4double cutEnergy) final;
85
86 G4double CrossSectionPerVolume(const G4Material*,
87 const G4ParticleDefinition*,
88 G4double kineticEnergy,
89 G4double cutEnergy,
90 G4double maxEnergy) final;
91
92 void SampleSecondaries(std::vector<G4DynamicParticle*>*,
93 const G4MaterialCutsCouple*,
94 const G4DynamicParticle*,
95 G4double tmin,
96 G4double maxEnergy) final;
97
98 G4double SampleFluctuations(const G4MaterialCutsCouple*,
99 const G4DynamicParticle*,
100 const G4double, const G4double,
101 const G4double, const G4double) final;
102
103 G4double Dispersion(const G4Material*, const G4DynamicParticle*,
104 const G4double, const G4double, const G4double) final;
105
106 void DefineForRegion(const G4Region* r) final;
107
108 inline G4PAIPhotData* GetPAIPhotData();
109
110 inline const std::vector<const G4MaterialCutsCouple*>& GetVectorOfCouples();
111
112 inline G4double ComputeMaxEnergy(G4double scaledEnergy);
113
114 inline void SetVerboseLevel(G4int verbose);
115
116 // hide assignment operator
117 G4PAIPhotModel & operator=(const G4PAIPhotModel &right) = delete;
118 G4PAIPhotModel(const G4PAIPhotModel&) = delete;
119
120 protected:
121
122 G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
123 G4double kinEnergy) final;
124
125 private:
126
127 inline G4int FindCoupleIndex(const G4MaterialCutsCouple*);
128
129 inline void SetParticle(const G4ParticleDefinition* p);
130
131 G4int fVerbose;
132
133 G4PAIPhotData* fModelData;
134
135 std::vector<const G4MaterialCutsCouple*> fMaterialCutsCoupleVector;
136 std::vector<const G4Region*> fPAIRegionVector;
137
138 const G4ParticleDefinition* fParticle;
139 const G4ParticleDefinition* fElectron;
140 const G4ParticleDefinition* fPositron;
141 G4ParticleChangeForLoss* fParticleChange;
142
143 G4double fMass;
144 G4double fRatio;
145 G4double fChargeSquare;
146 G4double fLowestTcut;
147 };
148
149 inline G4PAIPhotData* G4PAIPhotModel::GetPAIPhotData()
150 {
151 return fModelData;
152 }
153
154 inline const std::vector<const G4MaterialCutsCouple*>&
155 G4PAIPhotModel::GetVectorOfCouples()
156 {
157 return fMaterialCutsCoupleVector;
158 }
159
160 inline G4double G4PAIPhotModel::ComputeMaxEnergy(G4double scaledEnergy)
161 {
162 return MaxSecondaryEnergy(fParticle, scaledEnergy/fRatio);
163 }
164
165 inline void G4PAIPhotModel::SetVerboseLevel(G4int verbose)
166 {
167 fVerbose=verbose;
168 }
169
170 inline G4int G4PAIPhotModel::FindCoupleIndex(const G4MaterialCutsCouple* couple)
171 {
172 G4int idx = -1;
173 G4int jMatMax = (G4int)fMaterialCutsCoupleVector.size();
174 for(G4int jMat = 0;jMat < jMatMax; ++jMat) {
175 if(couple == fMaterialCutsCoupleVector[jMat]) {
176 idx = jMat;
177 break;
178 }
179 }
180 return idx;
181 }
182
183 inline void G4PAIPhotModel::SetParticle(const G4ParticleDefinition* p)
184 {
185 if(fParticle != p) {
186 fParticle = p;
187 fMass = fParticle->GetPDGMass();
188 fRatio = CLHEP::proton_mass_c2/fMass;
189 G4double q = fParticle->GetPDGCharge()/CLHEP::eplus;
190 fChargeSquare = q*q;
191 }
192 }
193
194 #endif
195