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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 // $Id: G4MuPairProductionModel.hh,v 1.27 2008/07/22 16:11:34 vnivanch Exp $ >> 27 // GEANT4 tag $Name: geant4-09-02 $ 26 // 28 // 27 // ------------------------------------------- 29 // ------------------------------------------------------------------- 28 // 30 // 29 // GEANT4 Class header file 31 // GEANT4 Class header file 30 // 32 // 31 // 33 // 32 // File name: G4MuPairProductionModel 34 // File name: G4MuPairProductionModel 33 // 35 // 34 // Author: Vladimir Ivanchenko on base 36 // Author: Vladimir Ivanchenko on base of Laszlo Urban code 35 // 37 // 36 // Creation date: 18.05.2002 38 // Creation date: 18.05.2002 37 // 39 // 38 // Modifications: 40 // Modifications: 39 // 41 // 40 // 23-12-02 Change interface in order to move 42 // 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 43 // 27-01-03 Make models region aware (V.Ivanchenko) 42 // 13-02-03 Add name (V.Ivanchenko) 44 // 13-02-03 Add name (V.Ivanchenko) 43 // 10-02-04 Update parameterisation using R.Ko 45 // 10-02-04 Update parameterisation using R.Kokoulin model (V.Ivanchenko) 44 // 10-02-04 Add lowestKinEnergy (V.Ivanchenko) 46 // 10-02-04 Add lowestKinEnergy (V.Ivanchenko) 45 // 13-02-06 Add ComputeCrossSectionPerAtom (mm 47 // 13-02-06 Add ComputeCrossSectionPerAtom (mma) 46 // 12-05-06 Add parameter to SelectRandomAtom 48 // 12-05-06 Add parameter to SelectRandomAtom (A.Bogdanov) 47 // 11-10-07 Add ignoreCut flag (V.Ivanchenko) 49 // 11-10-07 Add ignoreCut flag (V.Ivanchenko) 48 // 28-02-08 Reorganized protected methods and 50 // 28-02-08 Reorganized protected methods and members (V.Ivanchenko) >> 51 49 // 52 // 50 // Class Description: 53 // Class Description: 51 // 54 // 52 // Implementation of e+e- pair production by m 55 // 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 // 56 // >> 57 56 // ------------------------------------------- 58 // ------------------------------------------------------------------- 57 // 59 // 58 60 59 #ifndef G4MuPairProductionModel_h 61 #ifndef G4MuPairProductionModel_h 60 #define G4MuPairProductionModel_h 1 62 #define G4MuPairProductionModel_h 1 61 63 62 #include "G4VEmModel.hh" 64 #include "G4VEmModel.hh" 63 #include "G4NistManager.hh" 65 #include "G4NistManager.hh" 64 #include "G4ElementData.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 G4MuPairProductionModel(const G4ParticleDefinition* p = 0, 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 void Initialise(const G4ParticleDefinition*, const G4DataVector&); 82 82 83 void InitialiseLocal(const G4ParticleDefinit << 84 G4VEmModel* masterModel << 85 83 86 G4double ComputeCrossSectionPerAtom(const G4 << 84 virtual G4double ComputeCrossSectionPerAtom( 87 G4double kineticEnergy, << 85 const G4ParticleDefinition*, 88 G4double Z, G4double A, << 86 G4double kineticEnergy, 89 G4double cutEnergy, << 87 G4double Z, G4double A, 90 G4double maxEnergy) override; << 88 G4double cutEnergy, >> 89 G4double maxEnergy); 91 90 92 G4double ComputeDEDXPerVolume(const G4Materi << 91 virtual G4double ComputeDEDXPerVolume(const G4Material*, 93 const G4Partic 92 const G4ParticleDefinition*, 94 G4double kinet 93 G4double kineticEnergy, 95 G4double cutEn << 94 G4double cutEnergy); 96 95 97 void SampleSecondaries(std::vector<G4Dynamic << 96 virtual 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); 102 << 103 G4double MinPrimaryEnergy(const G4Material*, << 104 const G4ParticleDe << 105 G4double) override << 106 << 107 virtual G4double << 108 ComputeDMicroscopicCrossSection(G4double tki << 109 G4double pairEnergy); << 110 101 111 inline void SetLowestKineticEnergy(G4double 102 inline void SetLowestKineticEnergy(G4double e); 112 103 113 inline void SetParticle(const G4ParticleDefi << 104 inline G4double MinEnergyCut(const G4ParticleDefinition*, >> 105 const G4MaterialCutsCouple*); 114 106 115 // hide assignment operator and copy constru << 107 inline void SetParticle(const G4ParticleDefinition*); 116 G4MuPairProductionModel & operator= << 117 (const G4MuPairProductionModel &right) = del << 118 G4MuPairProductionModel(const G4MuPairProdu << 119 108 120 protected: 109 protected: 121 110 122 G4double ComputMuPairLoss(G4double Z, G4doub 111 G4double ComputMuPairLoss(G4double Z, G4double tkin, G4double cut, 123 G4double tmax); 112 G4double tmax); 124 113 125 G4double ComputeMicroscopicCrossSection(G4do 114 G4double ComputeMicroscopicCrossSection(G4double tkin, 126 G4do 115 G4double Z, 127 G4do 116 G4double cut); 128 117 129 G4double FindScaledEnergy(G4int Z, G4double << 118 virtual G4double ComputeDMicroscopicCrossSection(G4double tkin, 130 G4double yymin, G4double yymax); << 119 G4double Z, >> 120 G4double pairEnergy); 131 121 132 inline G4double MaxSecondaryEnergyForElement << 122 inline G4double MaxSecondaryEnergy(const G4ParticleDefinition*, 133 G4double Z); << 123 G4double kineticEnergy); 134 124 135 void MakeSamplingTables(); << 125 inline void SetCurrentElement(G4double Z); >> 126 >> 127 private: >> 128 >> 129 const G4Element* SelectRandomAtom(G4double kinEnergy, >> 130 G4double dt, >> 131 G4int it, >> 132 const G4MaterialCutsCouple* couple, >> 133 G4double tmin); 136 134 137 void StoreTables() const; << 135 void MakeSamplingTables(); 138 136 139 G4bool RetrieveTables(); << 137 inline G4double InterpolatedIntegralCrossSection( >> 138 G4double dt, G4double dz, G4int iz, >> 139 G4int it, G4int iy, G4double z); >> 140 >> 141 // hide assignment operator >> 142 G4MuPairProductionModel & operator=(const G4MuPairProductionModel &right); >> 143 G4MuPairProductionModel(const G4MuPairProductionModel&); 140 144 141 virtual void DataCorrupted(G4int Z, G4double << 145 protected: 142 146 143 G4ParticleChangeForLoss* fParticleChange = n << 147 const G4ParticleDefinition* particle; 144 const G4ParticleDefinition* particle = nullp << 148 G4NistManager* nist; 145 G4NistManager* nist = nullptr; << 146 149 147 G4double factorForCross; 150 G4double factorForCross; 148 G4double sqrte; 151 G4double sqrte; 149 G4double particleMass = 0.0; << 152 G4double particleMass; 150 G4double z13 = 0.0; << 153 G4double currentZ; 151 G4double z23 = 0.0; << 154 G4double z13; 152 G4double lnZ = 0.0; << 155 G4double z23; >> 156 G4double lnZ; >> 157 >> 158 static G4double xgi[8],wgi[8]; >> 159 >> 160 private: >> 161 >> 162 G4ParticleDefinition* theElectron; >> 163 G4ParticleDefinition* thePositron; >> 164 G4ParticleChangeForLoss* fParticleChange; 153 165 154 G4double minPairEnergy; 166 G4double minPairEnergy; 155 G4double lowestKinEnergy; 167 G4double lowestKinEnergy; 156 168 157 G4double emin; << 169 // tables for sampling 158 G4double emax; << 170 G4int nzdat; 159 G4double ymin = -5.0; << 171 G4int ntdat; 160 G4double dy = 0.005; << 172 G4int nbiny; 161 << 173 size_t nmaxElements; 162 G4int currentZ = 0; << 174 static G4double zdat[5],adat[5],tdat[8]; 163 G4int nYBinPerDecade = 4; << 175 G4double ya[1001],proba[5][8][1001]; 164 std::size_t nbiny = 1000; << 176 165 std::size_t nbine = 0; << 177 G4double ymin; 166 << 178 G4double ymax; 167 G4bool fTableToFile = false; << 179 G4double dy; 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: << 177 180 178 G4ParticleDefinition* theElectron; << 181 G4bool samplingTablesAreFilled; 179 G4ParticleDefinition* thePositron; << 182 std::vector<G4double> partialSum; 180 G4String dataName{""}; << 181 }; 183 }; 182 184 183 //....oooOO0OOooo........oooOO0OOooo........oo 185 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 184 186 185 inline void G4MuPairProductionModel::SetLowest 187 inline void G4MuPairProductionModel::SetLowestKineticEnergy(G4double e) 186 { 188 { 187 lowestKinEnergy = e; 189 lowestKinEnergy = e; 188 } 190 } 189 191 190 //....oooOO0OOooo........oooOO0OOooo........oo 192 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 191 193 192 inline 194 inline >> 195 G4double G4MuPairProductionModel::MinEnergyCut(const G4ParticleDefinition*, >> 196 const G4MaterialCutsCouple* ) >> 197 { >> 198 return minPairEnergy; >> 199 } >> 200 >> 201 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... >> 202 >> 203 inline 193 void G4MuPairProductionModel::SetParticle(cons 204 void G4MuPairProductionModel::SetParticle(const G4ParticleDefinition* p) 194 { 205 { 195 if(nullptr == particle) { << 206 if(!particle) { 196 particle = p; 207 particle = p; 197 particleMass = particle->GetPDGMass(); 208 particleMass = particle->GetPDGMass(); 198 } 209 } 199 } 210 } 200 211 201 //....oooOO0OOooo........oooOO0OOooo........oo 212 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 202 213 203 inline G4double << 214 inline G4double G4MuPairProductionModel::MaxSecondaryEnergy( 204 G4MuPairProductionModel::MaxSecondaryEnergyFor << 215 const G4ParticleDefinition*, 205 G4double ZZ) << 216 G4double kineticEnergy) >> 217 { >> 218 G4double maxPairEnergy = kineticEnergy + particleMass*(1.0 - 0.75*sqrte*z13); >> 219 return maxPairEnergy; >> 220 } >> 221 >> 222 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... >> 223 >> 224 inline void G4MuPairProductionModel::SetCurrentElement(G4double Z) 206 { 225 { 207 G4int Z = G4lrint(ZZ); << 208 if(Z != currentZ) { 226 if(Z != currentZ) { 209 currentZ = Z; 227 currentZ = Z; 210 z13 = nist->GetZ13(Z); << 228 G4int iz = G4int(Z); >> 229 z13 = nist->GetZ13(iz); 211 z23 = z13*z13; 230 z23 = z13*z13; 212 lnZ = nist->GetLOGZ(Z); << 231 lnZ = nist->GetLOGZ(iz); 213 } 232 } 214 return kineticEnergy + particleMass*(1.0 - 0 << 233 } >> 234 >> 235 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... >> 236 >> 237 inline G4double G4MuPairProductionModel::InterpolatedIntegralCrossSection( >> 238 G4double dt, G4double dz, >> 239 G4int iz, G4int it, G4int iy, G4double z) >> 240 { >> 241 G4double fac = 1./(zdat[iz] *(zdat[iz] +1.)); >> 242 G4double fac1 = 1./(zdat[iz-1]*(zdat[iz-1]+1.)); >> 243 G4double f0 = fac1*proba[iz-1][it-1][iy] + >> 244 (fac*proba[iz][it-1][iy]-fac1*proba[iz-1][it-1][iy])*dz; >> 245 G4double f1 = fac1*proba[iz-1][it ][iy] + >> 246 (fac*proba[iz][it ][iy]-fac1*proba[iz-1][it ][iy])*dz; >> 247 return (f0 + (f1-f0)*dt)*z*(z+1.); 215 } 248 } 216 249 217 //....oooOO0OOooo........oooOO0OOooo........oo 250 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 218 251 219 #endif 252 #endif 220 253