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Please see the license in the file LICENSE and URL above * 16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. * 17 // * 17 // * * 18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and * 19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. * 20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or * 21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its * 22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your * 23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. * 24 // ******************************************* 24 // ******************************************************************** 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 // 50 // Class Description: 51 // Class Description: 51 // 52 // 52 // Implementation of e+e- pair production by m 53 // Implementation of e+e- pair production by muons 53 // A.G. Bogdanov et al., IEEE Trans. Nuc. Sci. << 54 // Base class for all pair production models f << 55 // 54 // >> 55 56 // ------------------------------------------- 56 // ------------------------------------------------------------------- 57 // 57 // 58 58 59 #ifndef G4MuPairProductionModel_h 59 #ifndef G4MuPairProductionModel_h 60 #define G4MuPairProductionModel_h 1 60 #define G4MuPairProductionModel_h 1 61 61 62 #include "G4VEmModel.hh" 62 #include "G4VEmModel.hh" 63 #include "G4NistManager.hh" 63 #include "G4NistManager.hh" 64 #include "G4ElementData.hh" 64 #include "G4ElementData.hh" 65 #include "G4Physics2DVector.hh" 65 #include "G4Physics2DVector.hh" 66 #include <vector> 66 #include <vector> 67 67 68 class G4Element; 68 class G4Element; 69 class G4ParticleChangeForLoss; 69 class G4ParticleChangeForLoss; 70 class G4ParticleChangeForGamma; 70 class G4ParticleChangeForGamma; 71 71 72 class G4MuPairProductionModel : public G4VEmMo 72 class G4MuPairProductionModel : public G4VEmModel 73 { 73 { 74 public: 74 public: 75 75 76 explicit G4MuPairProductionModel(const G4Par 76 explicit G4MuPairProductionModel(const G4ParticleDefinition* p = nullptr, 77 const G4Str 77 const G4String& nam = "muPairProd"); 78 78 79 ~G4MuPairProductionModel() override = defaul << 79 virtual ~G4MuPairProductionModel(); 80 80 81 void Initialise(const G4ParticleDefinition*, << 81 virtual void Initialise(const G4ParticleDefinition*, >> 82 const G4DataVector&) override; 82 83 83 void InitialiseLocal(const G4ParticleDefinit << 84 virtual void InitialiseLocal(const G4ParticleDefinition*, 84 G4VEmModel* masterModel << 85 G4VEmModel* masterModel) override; 85 86 86 G4double ComputeCrossSectionPerAtom(const G4 << 87 virtual G4double ComputeCrossSectionPerAtom( 87 G4double kineticEnergy, << 88 const G4ParticleDefinition*, 88 G4double Z, G4double A, << 89 G4double kineticEnergy, 89 G4double cutEnergy, << 90 G4double Z, G4double A, 90 G4double maxEnergy) override; << 91 G4double cutEnergy, >> 92 G4double maxEnergy) override; 91 93 92 G4double ComputeDEDXPerVolume(const G4Materi << 94 virtual G4double ComputeDEDXPerVolume(const G4Material*, 93 const G4Partic 95 const G4ParticleDefinition*, 94 G4double kinet 96 G4double kineticEnergy, 95 G4double cutEn 97 G4double cutEnergy) override; 96 98 97 void SampleSecondaries(std::vector<G4Dynamic << 99 virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*, 98 const G4MaterialCutsCouple*, << 100 const G4MaterialCutsCouple*, 99 const G4DynamicParticle*, << 101 const G4DynamicParticle*, 100 G4double tmin, << 102 G4double tmin, 101 G4double maxEnergy) override; << 103 G4double maxEnergy) override; 102 << 104 103 G4double MinPrimaryEnergy(const G4Material*, << 105 virtual G4double MinPrimaryEnergy(const G4Material*, 104 const G4ParticleDe << 106 const G4ParticleDefinition*, 105 G4double) override << 107 G4double) override; 106 << 107 virtual G4double << 108 ComputeDMicroscopicCrossSection(G4double tki << 109 G4double pairEnergy); << 110 108 111 inline void SetLowestKineticEnergy(G4double 109 inline void SetLowestKineticEnergy(G4double e); 112 110 113 inline void SetParticle(const G4ParticleDefi 111 inline void SetParticle(const G4ParticleDefinition*); 114 112 115 // hide assignment operator and copy constru << 116 G4MuPairProductionModel & operator= << 117 (const G4MuPairProductionModel &right) = del << 118 G4MuPairProductionModel(const G4MuPairProdu << 119 << 120 protected: 113 protected: 121 114 122 G4double ComputMuPairLoss(G4double Z, G4doub 115 G4double ComputMuPairLoss(G4double Z, G4double tkin, G4double cut, 123 G4double tmax); 116 G4double tmax); 124 117 125 G4double ComputeMicroscopicCrossSection(G4do 118 G4double ComputeMicroscopicCrossSection(G4double tkin, 126 G4do 119 G4double Z, 127 G4do 120 G4double cut); 128 121 129 G4double FindScaledEnergy(G4int Z, G4double << 122 virtual G4double 130 G4double yymin, G4double yymax); << 123 ComputeDMicroscopicCrossSection(G4double tkin, G4double Z, >> 124 G4double pairEnergy); 131 125 132 inline G4double MaxSecondaryEnergyForElement 126 inline G4double MaxSecondaryEnergyForElement(G4double kineticEnergy, 133 G4double Z); 127 G4double Z); 134 128 >> 129 private: >> 130 135 void MakeSamplingTables(); 131 void MakeSamplingTables(); 136 132 137 void StoreTables() const; << 133 void DataCorrupted(G4int Z, G4double logTkin); >> 134 >> 135 inline G4double FindScaledEnergy(G4int Z, G4double rand, G4double logTkin, >> 136 G4double yymin, G4double yymax); 138 137 139 G4bool RetrieveTables(); << 138 // hide assignment operator >> 139 G4MuPairProductionModel & operator=(const G4MuPairProductionModel &right) = delete; >> 140 G4MuPairProductionModel(const G4MuPairProductionModel&) = delete; 140 141 141 virtual void DataCorrupted(G4int Z, G4double << 142 protected: 142 143 143 G4ParticleChangeForLoss* fParticleChange = n << 144 const G4ParticleDefinition* particle; 144 const G4ParticleDefinition* particle = nullp << 145 G4NistManager* nist; 145 G4NistManager* nist = nullptr; << 146 146 147 G4double factorForCross; 147 G4double factorForCross; 148 G4double sqrte; 148 G4double sqrte; 149 G4double particleMass = 0.0; << 149 G4double particleMass; 150 G4double z13 = 0.0; << 150 G4double z13; 151 G4double z23 = 0.0; << 151 G4double z23; 152 G4double lnZ = 0.0; << 152 G4double lnZ; >> 153 G4int currentZ; >> 154 >> 155 static const G4double xgi[8],wgi[8]; >> 156 >> 157 G4ParticleDefinition* theElectron; >> 158 G4ParticleDefinition* thePositron; >> 159 G4ParticleChangeForLoss* fParticleChange; 153 160 154 G4double minPairEnergy; 161 G4double minPairEnergy; 155 G4double lowestKinEnergy; 162 G4double lowestKinEnergy; 156 163 >> 164 G4int nzdat; >> 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 << 178 G4ParticleDefinition* theElectron; << 179 G4ParticleDefinition* thePositron; << 180 G4String dataName{""}; << 181 }; 174 }; 182 175 183 //....oooOO0OOooo........oooOO0OOooo........oo 176 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 184 177 185 inline void G4MuPairProductionModel::SetLowest 178 inline void G4MuPairProductionModel::SetLowestKineticEnergy(G4double e) 186 { 179 { 187 lowestKinEnergy = e; 180 lowestKinEnergy = e; 188 } 181 } 189 182 190 //....oooOO0OOooo........oooOO0OOooo........oo 183 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 191 184 192 inline 185 inline 193 void G4MuPairProductionModel::SetParticle(cons 186 void G4MuPairProductionModel::SetParticle(const G4ParticleDefinition* p) 194 { 187 { 195 if(nullptr == particle) { << 188 if(!particle) { 196 particle = p; 189 particle = p; 197 particleMass = particle->GetPDGMass(); 190 particleMass = particle->GetPDGMass(); 198 } 191 } 199 } 192 } 200 193 201 //....oooOO0OOooo........oooOO0OOooo........oo 194 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 202 195 203 inline G4double 196 inline G4double 204 G4MuPairProductionModel::MaxSecondaryEnergyFor 197 G4MuPairProductionModel::MaxSecondaryEnergyForElement(G4double kineticEnergy, 205 G4double ZZ) 198 G4double ZZ) 206 { 199 { 207 G4int Z = G4lrint(ZZ); 200 G4int Z = G4lrint(ZZ); 208 if(Z != currentZ) { 201 if(Z != currentZ) { 209 currentZ = Z; 202 currentZ = Z; 210 z13 = nist->GetZ13(Z); 203 z13 = nist->GetZ13(Z); 211 z23 = z13*z13; 204 z23 = z13*z13; 212 lnZ = nist->GetLOGZ(Z); 205 lnZ = nist->GetLOGZ(Z); 213 } 206 } 214 return kineticEnergy + particleMass*(1.0 - 0 207 return kineticEnergy + particleMass*(1.0 - 0.75*sqrte*z13); >> 208 } >> 209 >> 210 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... >> 211 >> 212 inline G4double >> 213 G4MuPairProductionModel::FindScaledEnergy(G4int Z, G4double rand, >> 214 G4double logTkin, >> 215 G4double yymin, G4double yymax) >> 216 { >> 217 G4double res = yymin; >> 218 G4Physics2DVector* pv = fElementData->GetElement2DData(Z); >> 219 if(!pv) { >> 220 DataCorrupted(Z, logTkin); >> 221 } else { >> 222 G4double pmin = pv->Value(yymin, logTkin); >> 223 G4double pmax = pv->Value(yymax, logTkin); >> 224 G4double p0 = pv->Value(0.0, logTkin); >> 225 if(p0 <= 0.0) { DataCorrupted(Z, logTkin); } >> 226 else { res = pv->FindLinearX((pmin + rand*(pmax - pmin))/p0, logTkin); } >> 227 } >> 228 return res; 215 } 229 } 216 230 217 //....oooOO0OOooo........oooOO0OOooo........oo 231 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 218 232 219 #endif 233 #endif 220 234