Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/processes/electromagnetic/standard/src/G4SimplePositronAtRestModel.cc

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 25 //
 26 //
 27 // GEANT4 Class file
 28 //
 29 //
 30 // File name:     G4SimplePositronAtRestModel
 31 //
 32 // Author:        Vladimir Ivanchenko
 33 // 
 34 // Creation date: 14 May 2024
 35 //
 36 // -------------------------------------------------------------------
 37 //
 38 
 39 #include "G4SimplePositronAtRestModel.hh"
 40 #include "G4DynamicParticle.hh"
 41 #include "G4Material.hh"
 42 #include "Randomize.hh"
 43 #include "G4Gamma.hh"
 44 #include "G4RandomDirection.hh"
 45 #include "G4ThreeVector.hh"
 46 #include "G4PhysicalConstants.hh"
 47 #include "G4SystemOfUnits.hh"
 48 
 49 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 50 
 51 G4SimplePositronAtRestModel::G4SimplePositronAtRestModel()
 52   : G4VPositronAtRestModel("Simple")
 53 {}    
 54 
 55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 56 
 57 void G4SimplePositronAtRestModel::SampleSecondaries(
 58              std::vector<G4DynamicParticle*>& secParticles,
 59              G4double&, const G4Material*) const
 60 {
 61   G4ThreeVector dir1 = G4RandomDirection();
 62   auto aGamma1 = new G4DynamicParticle(G4Gamma::Gamma(), dir1,
 63                CLHEP::electron_mass_c2);
 64   G4double phi = CLHEP::twopi * G4UniformRand();
 65   G4double cosphi = std::cos(phi);
 66   G4double sinphi = std::sin(phi);
 67   G4ThreeVector pol1(cosphi, sinphi, 0.0);
 68   pol1.rotateUz(dir1);
 69   aGamma1->SetPolarization(pol1);
 70   secParticles.push_back(aGamma1);
 71 
 72   G4ThreeVector dir2 = -dir1;
 73   auto aGamma2 = new G4DynamicParticle(G4Gamma::Gamma(), dir2,
 74                CLHEP::electron_mass_c2);
 75   G4ThreeVector pol2(-sinphi, cosphi, 0.0);
 76   pol2.rotateUz(dir1);
 77   aGamma2->SetPolarization(pol2);
 78   secParticles.push_back(aGamma2);  
 79 }
 80 
 81 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 82 
 83 void G4SimplePositronAtRestModel::PrintGeneratorInformation() const
 84 {
 85   G4cout << "\n" << G4endl;
 86   G4cout << "Simple AtRest positron 2-gamma annihilation model" << G4endl;
 87 } 
 88 
 89 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 90