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25 // 25 //
26 // 26 //
27 // ------------------------------------------- 27 // -------------------------------------------------------------------
28 // 28 //
29 // GEANT4 Class header file 29 // GEANT4 Class header file
30 // 30 //
31 // 31 //
32 // File name: G4MuPairProductionModel 32 // File name: G4MuPairProductionModel
33 // 33 //
34 // Author: Vladimir Ivanchenko on base 34 // Author: Vladimir Ivanchenko on base of Laszlo Urban code
35 // 35 //
36 // Creation date: 18.05.2002 36 // Creation date: 18.05.2002
37 // 37 //
38 // Modifications: 38 // Modifications:
39 // 39 //
40 // 23-12-02 Change interface in order to move 40 // 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
41 // 27-01-03 Make models region aware (V.Ivanch 41 // 27-01-03 Make models region aware (V.Ivanchenko)
42 // 13-02-03 Add name (V.Ivanchenko) 42 // 13-02-03 Add name (V.Ivanchenko)
43 // 10-02-04 Update parameterisation using R.Ko 43 // 10-02-04 Update parameterisation using R.Kokoulin model (V.Ivanchenko)
44 // 10-02-04 Add lowestKinEnergy (V.Ivanchenko) 44 // 10-02-04 Add lowestKinEnergy (V.Ivanchenko)
45 // 13-02-06 Add ComputeCrossSectionPerAtom (mm 45 // 13-02-06 Add ComputeCrossSectionPerAtom (mma)
46 // 12-05-06 Add parameter to SelectRandomAtom 46 // 12-05-06 Add parameter to SelectRandomAtom (A.Bogdanov)
47 // 11-10-07 Add ignoreCut flag (V.Ivanchenko) 47 // 11-10-07 Add ignoreCut flag (V.Ivanchenko)
48 // 28-02-08 Reorganized protected methods and 48 // 28-02-08 Reorganized protected methods and members (V.Ivanchenko)
49 // 49 //
50 // Class Description: 50 // Class Description:
51 // 51 //
52 // Implementation of e+e- pair production by m 52 // Implementation of e+e- pair production by muons
53 // A.G. Bogdanov et al., IEEE Trans. Nuc. Sci. 53 // A.G. Bogdanov et al., IEEE Trans. Nuc. Sci., Vol.53, No.2, 2006
54 // Base class for all pair production models f <<
55 // 54 //
56 // ------------------------------------------- 55 // -------------------------------------------------------------------
57 // 56 //
58 57
59 #ifndef G4MuPairProductionModel_h 58 #ifndef G4MuPairProductionModel_h
60 #define G4MuPairProductionModel_h 1 59 #define G4MuPairProductionModel_h 1
61 60
62 #include "G4VEmModel.hh" 61 #include "G4VEmModel.hh"
63 #include "G4NistManager.hh" 62 #include "G4NistManager.hh"
64 #include "G4ElementData.hh" 63 #include "G4ElementData.hh"
65 #include "G4Physics2DVector.hh" 64 #include "G4Physics2DVector.hh"
66 #include <vector> 65 #include <vector>
67 66
68 class G4Element; 67 class G4Element;
69 class G4ParticleChangeForLoss; 68 class G4ParticleChangeForLoss;
70 class G4ParticleChangeForGamma; 69 class G4ParticleChangeForGamma;
71 70
72 class G4MuPairProductionModel : public G4VEmMo 71 class G4MuPairProductionModel : public G4VEmModel
73 { 72 {
74 public: 73 public:
75 74
76 explicit G4MuPairProductionModel(const G4Par 75 explicit G4MuPairProductionModel(const G4ParticleDefinition* p = nullptr,
77 const G4Str 76 const G4String& nam = "muPairProd");
78 77
79 ~G4MuPairProductionModel() override = defaul << 78 ~G4MuPairProductionModel() = default;
80 79
81 void Initialise(const G4ParticleDefinition*, 80 void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;
82 81
83 void InitialiseLocal(const G4ParticleDefinit 82 void InitialiseLocal(const G4ParticleDefinition*,
84 G4VEmModel* masterModel 83 G4VEmModel* masterModel) override;
85 84
86 G4double ComputeCrossSectionPerAtom(const G4 85 G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition*,
87 G4double kineticEnergy, 86 G4double kineticEnergy,
88 G4double Z, G4double A, 87 G4double Z, G4double A,
89 G4double cutEnergy, 88 G4double cutEnergy,
90 G4double maxEnergy) override; 89 G4double maxEnergy) override;
91 90
92 G4double ComputeDEDXPerVolume(const G4Materi 91 G4double ComputeDEDXPerVolume(const G4Material*,
93 const G4Partic 92 const G4ParticleDefinition*,
94 G4double kinet 93 G4double kineticEnergy,
95 G4double cutEn 94 G4double cutEnergy) override;
96 95
97 void SampleSecondaries(std::vector<G4Dynamic 96 void SampleSecondaries(std::vector<G4DynamicParticle*>*,
98 const G4MaterialCutsCouple*, 97 const G4MaterialCutsCouple*,
99 const G4DynamicParticle*, 98 const G4DynamicParticle*,
100 G4double tmin, 99 G4double tmin,
101 G4double maxEnergy) override; 100 G4double maxEnergy) override;
102 101
103 G4double MinPrimaryEnergy(const G4Material*, 102 G4double MinPrimaryEnergy(const G4Material*,
104 const G4ParticleDe 103 const G4ParticleDefinition*,
105 G4double) override 104 G4double) override;
106 105
107 virtual G4double 106 virtual G4double
108 ComputeDMicroscopicCrossSection(G4double tki 107 ComputeDMicroscopicCrossSection(G4double tkin, G4double Z,
109 G4double pairEnergy); 108 G4double pairEnergy);
110 109
111 inline void SetLowestKineticEnergy(G4double 110 inline void SetLowestKineticEnergy(G4double e);
112 111
113 inline void SetParticle(const G4ParticleDefi 112 inline void SetParticle(const G4ParticleDefinition*);
114 113
115 // hide assignment operator and copy constru 114 // hide assignment operator and copy constructor
116 G4MuPairProductionModel & operator= 115 G4MuPairProductionModel & operator=
117 (const G4MuPairProductionModel &right) = del 116 (const G4MuPairProductionModel &right) = delete;
118 G4MuPairProductionModel(const G4MuPairProdu 117 G4MuPairProductionModel(const G4MuPairProductionModel&) = delete;
119 118
120 protected: 119 protected:
121 120
122 G4double ComputMuPairLoss(G4double Z, G4doub 121 G4double ComputMuPairLoss(G4double Z, G4double tkin, G4double cut,
123 G4double tmax); 122 G4double tmax);
124 123
125 G4double ComputeMicroscopicCrossSection(G4do 124 G4double ComputeMicroscopicCrossSection(G4double tkin,
126 G4do 125 G4double Z,
127 G4do 126 G4double cut);
128 127
129 G4double FindScaledEnergy(G4int Z, G4double 128 G4double FindScaledEnergy(G4int Z, G4double rand, G4double logTkin,
130 G4double yymin, G4double yymax); 129 G4double yymin, G4double yymax);
131 130
132 inline G4double MaxSecondaryEnergyForElement 131 inline G4double MaxSecondaryEnergyForElement(G4double kineticEnergy,
133 G4double Z); 132 G4double Z);
134 133
135 void MakeSamplingTables(); 134 void MakeSamplingTables();
136 135
137 void StoreTables() const; 136 void StoreTables() const;
138 137
139 G4bool RetrieveTables(); 138 G4bool RetrieveTables();
140 139
141 virtual void DataCorrupted(G4int Z, G4double 140 virtual void DataCorrupted(G4int Z, G4double logTkin) const;
142 141
143 G4ParticleChangeForLoss* fParticleChange = n 142 G4ParticleChangeForLoss* fParticleChange = nullptr;
144 const G4ParticleDefinition* particle = nullp 143 const G4ParticleDefinition* particle = nullptr;
145 G4NistManager* nist = nullptr; 144 G4NistManager* nist = nullptr;
146 145
147 G4double factorForCross; 146 G4double factorForCross;
148 G4double sqrte; 147 G4double sqrte;
149 G4double particleMass = 0.0; 148 G4double particleMass = 0.0;
150 G4double z13 = 0.0; 149 G4double z13 = 0.0;
151 G4double z23 = 0.0; 150 G4double z23 = 0.0;
152 G4double lnZ = 0.0; 151 G4double lnZ = 0.0;
153 152
154 G4double minPairEnergy; 153 G4double minPairEnergy;
155 G4double lowestKinEnergy; 154 G4double lowestKinEnergy;
156 155
157 G4double emin; 156 G4double emin;
158 G4double emax; 157 G4double emax;
159 G4double ymin = -5.0; 158 G4double ymin = -5.0;
160 G4double dy = 0.005; 159 G4double dy = 0.005;
161 160
162 G4int currentZ = 0; << 161 G4int currentZ = 0;
163 G4int nYBinPerDecade = 4; << 162 G4int nYBinPerDecade = 4;
164 std::size_t nbiny = 1000; << 163 size_t nbiny = 1000;
165 std::size_t nbine = 0; << 164 size_t nbine = 0;
166 165
167 G4bool fTableToFile = false; 166 G4bool fTableToFile = false;
168 167
169 // static members <<
170 static const G4int NZDATPAIR = 5; <<
171 static const G4int NINTPAIR = 8; <<
172 static const G4int ZDATPAIR[NZDATPAIR]; <<
173 static const G4double xgi[NINTPAIR]; <<
174 static const G4double wgi[NINTPAIR]; <<
175 <<
176 private: 168 private:
177 169
178 G4ParticleDefinition* theElectron; 170 G4ParticleDefinition* theElectron;
179 G4ParticleDefinition* thePositron; 171 G4ParticleDefinition* thePositron;
180 G4String dataName{""}; <<
181 }; 172 };
182 173
183 //....oooOO0OOooo........oooOO0OOooo........oo 174 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
184 175
185 inline void G4MuPairProductionModel::SetLowest 176 inline void G4MuPairProductionModel::SetLowestKineticEnergy(G4double e)
186 { 177 {
187 lowestKinEnergy = e; 178 lowestKinEnergy = e;
188 } 179 }
189 180
190 //....oooOO0OOooo........oooOO0OOooo........oo 181 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
191 182
192 inline 183 inline
193 void G4MuPairProductionModel::SetParticle(cons 184 void G4MuPairProductionModel::SetParticle(const G4ParticleDefinition* p)
194 { 185 {
195 if(nullptr == particle) { 186 if(nullptr == particle) {
196 particle = p; 187 particle = p;
197 particleMass = particle->GetPDGMass(); 188 particleMass = particle->GetPDGMass();
198 } 189 }
199 } 190 }
200 191
201 //....oooOO0OOooo........oooOO0OOooo........oo 192 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
202 193
203 inline G4double 194 inline G4double
204 G4MuPairProductionModel::MaxSecondaryEnergyFor 195 G4MuPairProductionModel::MaxSecondaryEnergyForElement(G4double kineticEnergy,
205 G4double ZZ) 196 G4double ZZ)
206 { 197 {
207 G4int Z = G4lrint(ZZ); 198 G4int Z = G4lrint(ZZ);
208 if(Z != currentZ) { 199 if(Z != currentZ) {
209 currentZ = Z; 200 currentZ = Z;
210 z13 = nist->GetZ13(Z); 201 z13 = nist->GetZ13(Z);
211 z23 = z13*z13; 202 z23 = z13*z13;
212 lnZ = nist->GetLOGZ(Z); 203 lnZ = nist->GetLOGZ(Z);
213 } 204 }
214 return kineticEnergy + particleMass*(1.0 - 0 205 return kineticEnergy + particleMass*(1.0 - 0.75*sqrte*z13);
215 } 206 }
216 207
217 //....oooOO0OOooo........oooOO0OOooo........oo 208 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
218 209
219 #endif 210 #endif
220 211