Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/processes/electromagnetic/standard/src/G4GammaConversion.cc

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 27 // 
 28 //------------------ G4GammaConversion physics process -------------------------
 29 //                   by Michel Maire, 24 May 1996
 30 //
 31 // Modified by Michel Maire and Vladimir Ivanchenko
 32 //
 33 // -----------------------------------------------------------------------------
 34 
 35 #include "G4GammaConversion.hh"
 36 #include "G4PhysicalConstants.hh"
 37 #include "G4SystemOfUnits.hh"
 38 #include "G4PairProductionRelModel.hh"
 39 #include "G4Electron.hh"
 40 #include "G4EmParameters.hh"
 41 
 42 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 43 
 44 G4GammaConversion::G4GammaConversion(const G4String& processName,
 45   G4ProcessType type):G4VEmProcess (processName, type)
 46 {
 47   SetMinKinEnergy(2.0*CLHEP::electron_mass_c2);
 48   SetProcessSubType(fGammaConversion);
 49   SetStartFromNullFlag(true);
 50   SetBuildTableFlag(true);
 51   SetSecondaryParticle(G4Electron::Electron());
 52   SetLambdaBinning(220);
 53 }
 54 
 55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 56  
 57 G4GammaConversion::~G4GammaConversion() = default;
 58 
 59 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 60 
 61 G4bool G4GammaConversion::IsApplicable(const G4ParticleDefinition& p)
 62 {
 63   return (&p == G4Gamma::Gamma());
 64 }
 65 
 66 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 67 
 68 void G4GammaConversion::InitialiseProcess(const G4ParticleDefinition*)
 69 {
 70   if(!isInitialised) {
 71     isInitialised = true;
 72     G4EmParameters* param = G4EmParameters::Instance();
 73     G4double emin = std::max(param->MinKinEnergy(), 2*CLHEP::electron_mass_c2);
 74     G4double emax = param->MaxKinEnergy();
 75 
 76     SetMinKinEnergy(emin);
 77 
 78     if(nullptr == EmModel(0)) { SetEmModel(new G4PairProductionRelModel()); }
 79     EmModel(0)->SetLowEnergyLimit(emin);
 80     EmModel(0)->SetHighEnergyLimit(emax);
 81     AddEmModel(1, EmModel(0));
 82   } 
 83 }
 84 
 85 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 86 
 87 G4double G4GammaConversion::MinPrimaryEnergy(const G4ParticleDefinition*,
 88                const G4Material*)
 89 {
 90   return 2*CLHEP::electron_mass_c2;
 91 }
 92 
 93 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 94 
 95 void G4GammaConversion::ProcessDescription(std::ostream& out) const
 96 {
 97   out << "  Gamma conversion";
 98   G4VEmProcess::ProcessDescription(out);
 99 }
100 
101 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 
102