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1 // 1 2 // ******************************************* 3 // * License and Disclaimer 4 // * 5 // * The Geant4 software is copyright of th 6 // * the Geant4 Collaboration. It is provided 7 // * conditions of the Geant4 Software License 8 // * LICENSE and available at http://cern.ch/ 9 // * include a list of copyright holders. 10 // * 11 // * Neither the authors of this software syst 12 // * institutes,nor the agencies providing fin 13 // * work make any representation or warran 14 // * regarding this software system or assum 15 // * use. Please see the license in the file 16 // * for the full disclaimer and the limitatio 17 // * 18 // * This code implementation is the result 19 // * technical work of the GEANT4 collaboratio 20 // * By using, copying, modifying or distri 21 // * any work based on the software) you ag 22 // * use in resulting scientific publicati 23 // * acceptance of all terms of the Geant4 Sof 24 // ******************************************* 25 // 26 // 27 // ------------------------------------------- 28 // 29 // GEANT4 Class header file 30 // 31 // 32 // File name: G4eCoulombScatteringModel 33 // 34 // Author: Vladimir Ivanchenko 35 // 36 // Creation date: 19.02.2006 37 // 38 // Modifications: 39 // 01.08.06 V.Ivanchenko extend upper limit of 40 // logic of building - only elements 41 // 08.08.06 V.Ivanchenko build internal table 42 // 19.08.06 V.Ivanchenko add inline function S 43 // make some members pro 44 // 09.10.07 V.Ivanchenko reorganized methods, 45 // 09.06.08 V.Ivanchenko add SelectIsotope and 46 // 17.06.09 C.Consoalndi modified SetupTarget 47 // 27.05.10 V.Ivanchenko added G4WentzelOKandV 48 // compute cross sections and sam 49 // 50 // 51 // Class Description: 52 // 53 // Implementation of eCoulombScattering of a c 54 // on Atomic Nucleus for interval of scatterin 55 // thetaMin - ThetaMax. 56 // The model based on analysis of J.M.Fernan 57 // NIM B73(1993)447 originated from G.Wentzel 58 // screening parameter from H.A.Bethe Phys. Re 59 // 60 61 // ------------------------------------------- 62 // 63 64 #ifndef G4eCoulombScatteringModel_h 65 #define G4eCoulombScatteringModel_h 1 66 67 #include "G4VEmModel.hh" 68 #include "globals.hh" 69 #include "G4MaterialCutsCouple.hh" 70 #include "G4WentzelOKandVIxSection.hh" 71 72 class G4ParticleChangeForGamma; 73 class G4ParticleDefinition; 74 class G4IonTable; 75 class G4NistManager; 76 77 class G4eCoulombScatteringModel : public G4VEm 78 { 79 80 public: 81 82 explicit G4eCoulombScatteringModel(G4bool co 83 84 ~G4eCoulombScatteringModel() override; 85 86 void Initialise(const G4ParticleDefinition*, 87 88 void InitialiseLocal(const G4ParticleDefinit 89 G4VEmModel* masterModel 90 91 G4double ComputeCrossSectionPerAtom( 92 const G4Partic 93 G4double kinEnergy, 94 G4double Z, 95 G4double A, 96 G4double cut, 97 G4double emax) override; 98 99 void SampleSecondaries(std::vector<G4Dynamic 100 const G4MaterialCutsCouple*, 101 const G4DynamicParticle*, 102 G4double tmin, 103 G4double maxEnergy) override; 104 105 G4double MinPrimaryEnergy(const G4Material*, 106 G4double) final; 107 108 // defines low energy limit of the model 109 inline void SetLowEnergyThreshold(G4double v 110 111 // user definition of low-energy threshold o 112 inline void SetRecoilThreshold(G4double eth) 113 114 // defines low energy limit on energy transf 115 inline void SetFixedCut(G4double); 116 117 // low energy limit on energy transfer to at 118 inline G4double GetFixedCut() const; 119 120 // hide assignment operator 121 G4eCoulombScatteringModel & operator= 122 (const G4eCoulombScatteringModel &right) = d 123 G4eCoulombScatteringModel(const G4eCoulombS 124 125 protected: 126 127 inline void DefineMaterial(const G4MaterialC 128 129 inline void SetupParticle(const G4ParticleDe 130 131 private: 132 133 G4IonTable* theIonTable; 134 G4ParticleChangeForGamma* fParticleChange = 135 G4WentzelOKandVIxSection* wokvi; 136 G4NistManager* fNistManager; 137 138 const std::vector<G4double>* pCuts = nullptr 139 140 const G4ParticleDefinition* particle = nullp 141 const G4ParticleDefinition* theProton; 142 143 const G4MaterialCutsCouple* currentCouple = 144 const G4Material* currentMaterial = nullptr; 145 G4int currentMaterialIndex = 0; 146 147 G4double cosThetaMin = 1.0; 148 G4double cosThetaMax = -1.0; 149 G4double recoilThreshold = 0.0; 150 G4double elecRatio = 0.0; 151 G4double fixedCut = -1.0; 152 G4double mass; 153 154 G4bool isCombined; 155 }; 156 157 //....oooOO0OOooo........oooOO0OOooo........oo 158 159 inline 160 void G4eCoulombScatteringModel::DefineMaterial 161 { 162 if(cup != currentCouple) { 163 currentCouple = cup; 164 currentMaterial = cup->GetMaterial(); 165 currentMaterialIndex = currentCouple->GetI 166 } 167 } 168 169 //....oooOO0OOooo........oooOO0OOooo........oo 170 171 inline 172 void G4eCoulombScatteringModel::SetupParticle( 173 { 174 // Initialise mass and charge 175 if(p != particle) { 176 particle = p; 177 mass = particle->GetPDGMass(); 178 wokvi->SetupParticle(p); 179 } 180 } 181 182 //....oooOO0OOooo........oooOO0OOooo........oo 183 184 inline void G4eCoulombScatteringModel::SetReco 185 { 186 recoilThreshold = eth; 187 } 188 189 //....oooOO0OOooo........oooOO0OOooo........oo 190 191 inline void G4eCoulombScatteringModel::SetFixe 192 { 193 fixedCut = val; 194 } 195 196 //....oooOO0OOooo........oooOO0OOooo........oo 197 198 inline G4double G4eCoulombScatteringModel::Get 199 { 200 return fixedCut; 201 } 202 203 //....oooOO0OOooo........oooOO0OOooo........oo 204 205 #endif 206