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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 virtual ~G4MuPairProductionModel();
80 79
81 void Initialise(const G4ParticleDefinition*, << 80 virtual void Initialise(const G4ParticleDefinition*,
>> 81 const G4DataVector&) override;
82 82
83 void InitialiseLocal(const G4ParticleDefinit << 83 virtual void InitialiseLocal(const G4ParticleDefinition*,
84 G4VEmModel* masterModel << 84 G4VEmModel* masterModel) override;
85 85
86 G4double ComputeCrossSectionPerAtom(const G4 << 86 virtual G4double ComputeCrossSectionPerAtom(
87 G4double kineticEnergy, << 87 const G4ParticleDefinition*,
88 G4double Z, G4double A, << 88 G4double kineticEnergy,
89 G4double cutEnergy, << 89 G4double Z, G4double A,
90 G4double maxEnergy) override; << 90 G4double cutEnergy,
>> 91 G4double maxEnergy) override;
91 92
92 G4double ComputeDEDXPerVolume(const G4Materi << 93 virtual G4double ComputeDEDXPerVolume(const G4Material*,
93 const G4Partic 94 const G4ParticleDefinition*,
94 G4double kinet 95 G4double kineticEnergy,
95 G4double cutEn 96 G4double cutEnergy) override;
96 97
97 void SampleSecondaries(std::vector<G4Dynamic << 98 virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
98 const G4MaterialCutsCouple*, << 99 const G4MaterialCutsCouple*,
99 const G4DynamicParticle*, << 100 const G4DynamicParticle*,
100 G4double tmin, << 101 G4double tmin,
101 G4double maxEnergy) override; << 102 G4double maxEnergy) override;
102 << 103
103 G4double MinPrimaryEnergy(const G4Material*, << 104 virtual G4double MinPrimaryEnergy(const G4Material*,
104 const G4ParticleDe << 105 const G4ParticleDefinition*,
105 G4double) override << 106 G4double) override;
106 <<
107 virtual G4double <<
108 ComputeDMicroscopicCrossSection(G4double tki <<
109 G4double pairEnergy); <<
110 107
111 inline void SetLowestKineticEnergy(G4double 108 inline void SetLowestKineticEnergy(G4double e);
112 109
113 inline void SetParticle(const G4ParticleDefi 110 inline void SetParticle(const G4ParticleDefinition*);
114 111
115 // hide assignment operator and copy constru 112 // hide assignment operator and copy constructor
116 G4MuPairProductionModel & operator= 113 G4MuPairProductionModel & operator=
117 (const G4MuPairProductionModel &right) = del 114 (const G4MuPairProductionModel &right) = delete;
118 G4MuPairProductionModel(const G4MuPairProdu 115 G4MuPairProductionModel(const G4MuPairProductionModel&) = delete;
119 116
120 protected: 117 protected:
121 118
122 G4double ComputMuPairLoss(G4double Z, G4doub 119 G4double ComputMuPairLoss(G4double Z, G4double tkin, G4double cut,
123 G4double tmax); 120 G4double tmax);
124 121
125 G4double ComputeMicroscopicCrossSection(G4do 122 G4double ComputeMicroscopicCrossSection(G4double tkin,
126 G4do 123 G4double Z,
127 G4do 124 G4double cut);
128 125
129 G4double FindScaledEnergy(G4int Z, G4double << 126 virtual G4double
130 G4double yymin, G4double yymax); << 127 ComputeDMicroscopicCrossSection(G4double tkin, G4double Z,
>> 128 G4double pairEnergy);
131 129
132 inline G4double MaxSecondaryEnergyForElement 130 inline G4double MaxSecondaryEnergyForElement(G4double kineticEnergy,
133 G4double Z); 131 G4double Z);
134 132
>> 133 private:
>> 134
135 void MakeSamplingTables(); 135 void MakeSamplingTables();
136 136
137 void StoreTables() const; 137 void StoreTables() const;
138 138
139 G4bool RetrieveTables(); 139 G4bool RetrieveTables();
140 140
141 virtual void DataCorrupted(G4int Z, G4double << 141 void DataCorrupted(G4int Z, G4double logTkin) const;
>> 142
>> 143 inline G4double FindScaledEnergy(G4int Z, G4double rand, G4double logTkin,
>> 144 G4double yymin, G4double yymax);
>> 145
>> 146 protected:
142 147
143 G4ParticleChangeForLoss* fParticleChange = n << 148 const G4ParticleDefinition* particle;
144 const G4ParticleDefinition* particle = nullp << 149 G4NistManager* nist;
145 G4NistManager* nist = nullptr; <<
146 150
147 G4double factorForCross; 151 G4double factorForCross;
148 G4double sqrte; 152 G4double sqrte;
149 G4double particleMass = 0.0; << 153 G4double particleMass;
150 G4double z13 = 0.0; << 154 G4double z13;
151 G4double z23 = 0.0; << 155 G4double z23;
152 G4double lnZ = 0.0; << 156 G4double lnZ;
>> 157 G4int currentZ;
>> 158
>> 159 G4ParticleDefinition* theElectron;
>> 160 G4ParticleDefinition* thePositron;
>> 161 G4ParticleChangeForLoss* fParticleChange;
153 162
154 G4double minPairEnergy; 163 G4double minPairEnergy;
155 G4double lowestKinEnergy; 164 G4double lowestKinEnergy;
156 165
>> 166 // gamma energy bins
>> 167 G4int nYBinPerDecade;
>> 168 size_t nbiny;
>> 169 size_t nbine;
>> 170 G4double ymin;
>> 171 G4double dy;
157 G4double emin; 172 G4double emin;
158 G4double emax; 173 G4double emax;
159 G4double ymin = -5.0; <<
160 G4double dy = 0.005; <<
161 <<
162 G4int currentZ = 0; <<
163 G4int nYBinPerDecade = 4; <<
164 std::size_t nbiny = 1000; <<
165 std::size_t nbine = 0; <<
166 <<
167 G4bool fTableToFile = false; <<
168 <<
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: <<
177 174
178 G4ParticleDefinition* theElectron; << 175 G4bool fTableToFile;
179 G4ParticleDefinition* thePositron; <<
180 G4String dataName{""}; <<
181 }; 176 };
182 177
183 //....oooOO0OOooo........oooOO0OOooo........oo 178 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
184 179
185 inline void G4MuPairProductionModel::SetLowest 180 inline void G4MuPairProductionModel::SetLowestKineticEnergy(G4double e)
186 { 181 {
187 lowestKinEnergy = e; 182 lowestKinEnergy = e;
188 } 183 }
189 184
190 //....oooOO0OOooo........oooOO0OOooo........oo 185 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
191 186
192 inline 187 inline
193 void G4MuPairProductionModel::SetParticle(cons 188 void G4MuPairProductionModel::SetParticle(const G4ParticleDefinition* p)
194 { 189 {
195 if(nullptr == particle) { << 190 if(!particle) {
196 particle = p; 191 particle = p;
197 particleMass = particle->GetPDGMass(); 192 particleMass = particle->GetPDGMass();
198 } 193 }
199 } 194 }
200 195
201 //....oooOO0OOooo........oooOO0OOooo........oo 196 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
202 197
203 inline G4double 198 inline G4double
204 G4MuPairProductionModel::MaxSecondaryEnergyFor 199 G4MuPairProductionModel::MaxSecondaryEnergyForElement(G4double kineticEnergy,
205 G4double ZZ) 200 G4double ZZ)
206 { 201 {
207 G4int Z = G4lrint(ZZ); 202 G4int Z = G4lrint(ZZ);
208 if(Z != currentZ) { 203 if(Z != currentZ) {
209 currentZ = Z; 204 currentZ = Z;
210 z13 = nist->GetZ13(Z); 205 z13 = nist->GetZ13(Z);
211 z23 = z13*z13; 206 z23 = z13*z13;
212 lnZ = nist->GetLOGZ(Z); 207 lnZ = nist->GetLOGZ(Z);
213 } 208 }
214 return kineticEnergy + particleMass*(1.0 - 0 209 return kineticEnergy + particleMass*(1.0 - 0.75*sqrte*z13);
>> 210 }
>> 211
>> 212 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 213
>> 214 inline G4double
>> 215 G4MuPairProductionModel::FindScaledEnergy(G4int Z, G4double rand,
>> 216 G4double logTkin,
>> 217 G4double yymin, G4double yymax)
>> 218 {
>> 219 G4double res = yymin;
>> 220 G4Physics2DVector* pv = fElementData->GetElement2DData(Z);
>> 221 if(!pv) {
>> 222 DataCorrupted(Z, logTkin);
>> 223 } else {
>> 224 G4double pmin = pv->Value(yymin, logTkin);
>> 225 G4double pmax = pv->Value(yymax, logTkin);
>> 226 G4double p0 = pv->Value(0.0, logTkin);
>> 227 if(p0 <= 0.0) { DataCorrupted(Z, logTkin); }
>> 228 else { res = pv->FindLinearX((pmin + rand*(pmax - pmin))/p0, logTkin); }
>> 229 }
>> 230 return res;
215 } 231 }
216 232
217 //....oooOO0OOooo........oooOO0OOooo........oo 233 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
218 234
219 #endif 235 #endif
220 236