include/Geant4/G4hCoulombScatteringModel.hh

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0025 //
0026 //
0027 // -------------------------------------------------------------------
0028 //
0029 // GEANT4 Class header file
0030 //
0031 //
0032 // File name:     G4hCoulombScatteringModel
0033 //
0034 // Author:        Vladimir Ivanchenko
0035 //
0036 // Creation date: 08.06.2012 from G4eCoulombScatteringModel
0037 //
0038 // Modifications:
0039 //
0040 // Class Description:
0041 //
0042 // Implementation of Coulomb Scattering of a charge particle
0043 // on Atomic Nucleus for interval of scattering anles in Lab system
0044 // thetaMin - ThetaMax.
0045 //   The model based on analysis of J.M.Fernandez-Varea et al.
0046 // NIM B73(1993)447 originated from G.Wentzel Z.Phys. 40(1927)590 with
0047 // screening parameter from H.A.Bethe Phys. Rev. 89 (1953) 1256.
0048 //
0049
0050 // -------------------------------------------------------------------
0051 //
0052
0053 #ifndef G4hCoulombScatteringModel_h
0054 #define G4hCoulombScatteringModel_h 1
0055
0056 #include "G4VEmModel.hh"
0057 #include "globals.hh"
0058 #include "G4MaterialCutsCouple.hh"
0059 #include "G4WentzelVIRelXSection.hh"
0060
0061 class G4ParticleChangeForGamma;
0062 class G4ParticleDefinition;
0063 class G4IonTable;
0064 class G4NistManager;
0065
0066 class G4hCoulombScatteringModel : public G4VEmModel
0067 {
0068
0069 public:
0070
0071   explicit G4hCoulombScatteringModel(G4bool combined = true);
0072
0073   ~G4hCoulombScatteringModel() override;
0074
0075   void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;
0076
0077   void InitialiseLocal(const G4ParticleDefinition*,
0078                        G4VEmModel* masterModel) override;
0079
0080   G4double ComputeCrossSectionPerAtom(
0081                                 const G4ParticleDefinition*,
0082                 G4double kinEnergy,
0083                 G4double Z,
0084                 G4double A,
0085                 G4double cut,
0086                 G4double emax) override;
0087
0088   void SampleSecondaries(std::vector<G4DynamicParticle*>*,
0089              const G4MaterialCutsCouple*,
0090              const G4DynamicParticle*,
0091              G4double tmin,
0092              G4double maxEnergy) override;
0093
0094   G4double MinPrimaryEnergy(const G4Material*,
0095                 const G4ParticleDefinition*,
0096                 G4double) final;
0097
0098   // defines low energy limit of the model
0099   inline void SetLowEnergyThreshold(G4double val);
0100
0101   // user definition of low-energy threshold of recoil
0102   inline void SetRecoilThreshold(G4double eth);
0103
0104   // defines low energy limit on energy transfer to atomic electron
0105   inline void SetFixedCut(G4double);
0106
0107   // low energy limit on energy transfer to atomic electron
0108   inline G4double GetFixedCut() const;
0109
0110   // hide assignment operator
0111   G4hCoulombScatteringModel & operator=
0112   (const G4hCoulombScatteringModel &right) = delete;
0113   G4hCoulombScatteringModel(const  G4hCoulombScatteringModel&) = delete;
0114
0115 protected:
0116
0117   inline void DefineMaterial(const G4MaterialCutsCouple*);
0118
0119   inline void SetupParticle(const G4ParticleDefinition*);
0120
0121 private:
0122
0123   G4IonTable*               theIonTable;
0124   G4ParticleChangeForGamma* fParticleChange;
0125   G4WentzelVIRelXSection*   wokvi;
0126   G4NistManager*            fNistManager;
0127
0128   const G4ParticleDefinition*  particle;
0129   const G4ParticleDefinition*  theProton;
0130   const std::vector<G4double>* pCuts;
0131
0132   const G4MaterialCutsCouple* currentCouple;
0133   const G4Material*           currentMaterial;
0134   G4int                       currentMaterialIndex;
0135
0136   G4double                  cosThetaMin;
0137   G4double                  cosThetaMax;
0138   G4double                  recoilThreshold;
0139   G4double                  elecRatio;
0140   G4double                  mass;
0141
0142   G4double                  fixedCut;
0143
0144   G4bool                    isCombined;
0145 };
0146
0147 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0148
0149 inline
0150 void G4hCoulombScatteringModel::DefineMaterial(const G4MaterialCutsCouple* cup)
0151 {
0152   if(cup != currentCouple) {
0153     currentCouple = cup;
0154     currentMaterial = cup->GetMaterial();
0155     currentMaterialIndex = currentCouple->GetIndex();
0156   }
0157 }
0158
0159 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0160
0161 inline
0162 void G4hCoulombScatteringModel::SetupParticle(const G4ParticleDefinition* p)
0163 {
0164   // Initialise mass and charge
0165   if(p != particle) {
0166     particle = p;
0167     mass = particle->GetPDGMass();
0168     wokvi->SetupParticle(p);
0169   }
0170 }
0171
0172 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0173
0174 inline void G4hCoulombScatteringModel::SetRecoilThreshold(G4double eth)
0175 {
0176   recoilThreshold = eth;
0177 }
0178
0179 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0180
0181 inline void G4hCoulombScatteringModel::SetFixedCut(G4double val)
0182 {
0183   fixedCut = val;
0184 }
0185
0186 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0187
0188 inline G4double G4hCoulombScatteringModel::GetFixedCut() const
0189 {
0190   return fixedCut;
0191 }
0192
0193 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0194
0195 #endif