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Geant4/processes/electromagnetic/lowenergy/src/G4PhotoElectricAngularGeneratorSauterGavrila.cc

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Differences between /processes/electromagnetic/lowenergy/src/G4PhotoElectricAngularGeneratorSauterGavrila.cc (Version 11.3.0) and /processes/electromagnetic/lowenergy/src/G4PhotoElectricAngularGeneratorSauterGavrila.cc (Version 9.5)


  1 //                                                  1 //
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 19 // * technical work of the GEANT4 collaboratio     19 // * technical work of the GEANT4 collaboration.                      *
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 24 // *******************************************     24 // ********************************************************************
 25 //                                                 25 //
 26 //                                                 26 //
 27 // -------------------------------------------     27 // -------------------------------------------------------------------
 28 //                                                 28 //
 29 // GEANT4 Class file                               29 // GEANT4 Class file
 30 //                                                 30 //
 31 //                                                 31 //
 32 // File name:     G4PhotoElectricAngularGenera     32 // File name:     G4PhotoElectricAngularGeneratorSauterGavrila
 33 //                                                 33 //
 34 // Creation date: 10 May 2004                      34 // Creation date: 10 May 2004
 35 //                                                 35 //
 36 // Modifications:                                  36 // Modifications: 
 37 // 10 May 2003     P. Rodrigues    First imple     37 // 10 May 2003     P. Rodrigues    First implementation acording with new design
 38 //                                                 38 //
 39 // Class Description:                              39 // Class Description: 
 40 //                                                 40 //
 41 // Concrete class for PhotoElectric Electron A     41 // Concrete class for PhotoElectric Electron Angular Distribution Generation 
 42 // This model is a re-implementation of the Ph     42 // This model is a re-implementation of the Photolectric angular distribution
 43 // developed my M. Maire for the Standard EM P     43 // developed my M. Maire for the Standard EM Physics G4PhotoElectricEffect 
 44 //                                                 44 //
 45 // Class Description: End                          45 // Class Description: End 
 46 //                                                 46 //
 47 // -------------------------------------------     47 // -------------------------------------------------------------------
 48 //                                                 48 //
                                                   >>  49 //    
 49                                                    50 
 50 #include "G4PhotoElectricAngularGeneratorSaute     51 #include "G4PhotoElectricAngularGeneratorSauterGavrila.hh"
 51 #include "G4PhysicalConstants.hh"              << 
 52 #include "Randomize.hh"                            52 #include "Randomize.hh"
 53                                                    53 
 54 // ------------------------------------------- <<  54 //    
 55 G4PhotoElectricAngularGeneratorSauterGavrila:: << 
 56   G4VEmAngularDistribution("AngularGenSauterGa << 
 57 {}                                             << 
 58                                                    55 
 59 // ------------------------------------------- <<  56 G4PhotoElectricAngularGeneratorSauterGavrila::G4PhotoElectricAngularGeneratorSauterGavrila(const G4String& name):
                                                   >>  57   G4VPhotoElectricAngularDistribution(name)
                                                   >>  58 {;}
                                                   >>  59 
                                                   >>  60 //    
 60                                                    61 
 61 G4PhotoElectricAngularGeneratorSauterGavrila::     62 G4PhotoElectricAngularGeneratorSauterGavrila::~G4PhotoElectricAngularGeneratorSauterGavrila() 
 62 {}                                             <<  63 {;}
 63                                                    64 
 64 // ------------------------------------------- <<  65 //
 65                                                    66 
 66 G4ThreeVector&                                 <<  67 G4ThreeVector G4PhotoElectricAngularGeneratorSauterGavrila::GetPhotoElectronDirection(const G4ThreeVector& direction, 
 67 G4PhotoElectricAngularGeneratorSauterGavrila:: <<  68                           const G4double eKineticEnergy, 
 68                          const G4DynamicPartic <<  69                           const G4ThreeVector&, const G4int) const
 69                          G4double, G4int, cons << 
 70 {                                                  70 {
 71                                                    71 
 72   // Compute Theta distribution of the emitted     72   // Compute Theta distribution of the emitted electron, with respect to the
 73   // incident Gamma.                               73   // incident Gamma.
 74   // The Sauter-Gavrila distribution for the K <<  74   // The Sauter-Gavrila distribution for the K-shell is used. (adapted from G4PhotoElectricEffect)
                                                   >>  75 
 75   G4double costeta = 1.;                           76   G4double costeta = 1.;
 76   G4double Phi     = twopi * G4UniformRand();      77   G4double Phi     = twopi * G4UniformRand();
 77   G4double cosphi = std::cos(Phi);                 78   G4double cosphi = std::cos(Phi);
 78   G4double sinphi = std::sin(Phi);                 79   G4double sinphi = std::sin(Phi);
 79   G4double sinteta = 0;                            80   G4double sinteta = 0;
 80   G4double gamma   = 1. + dp->GetKineticEnergy <<  81   G4double gamma   = 1. + eKineticEnergy/electron_mass_c2;
 81                                                    82 
 82   if (gamma > 5.) {                                83   if (gamma > 5.) {
 83     fLocalDirection = dp->GetMomentumDirection <<  84     G4ThreeVector outdirection (sinteta*cosphi, sinteta*sinphi, costeta);
 84     return fLocalDirection;                    <<  85     return outdirection; 
 85     // Bugzilla 1120                               86     // Bugzilla 1120
 86     // SI on 05/09/2010 as suggested by JG 04/     87     // SI on 05/09/2010 as suggested by JG 04/09/10 
 87   }                                                88   }
 88                                                    89 
 89   G4double beta  = std::sqrt((gamma - 1)*(gamm <<  90   G4double beta  = std::sqrt(gamma*gamma-1.)/gamma;
 90   G4double b     = 0.5*gamma*(gamma - 1)*(gamm <<  91   G4double b     = 0.5*gamma*(gamma-1.)*(gamma-2);
 91                                                    92     
 92   G4double rndm,term,greject,grejsup;              93   G4double rndm,term,greject,grejsup;
 93   if (gamma < 2.) grejsup = gamma*gamma*(1.+b-     94   if (gamma < 2.) grejsup = gamma*gamma*(1.+b-beta*b);
 94   else            grejsup = gamma*gamma*(1.+b+     95   else            grejsup = gamma*gamma*(1.+b+beta*b);
 95                                                    96   
 96   do { rndm = 1.-2*G4UniformRand();                97   do { rndm = 1.-2*G4UniformRand();
 97        costeta = (rndm+beta)/(rndm*beta+1.);       98        costeta = (rndm+beta)/(rndm*beta+1.);
 98        term = 1.-beta*costeta;                     99        term = 1.-beta*costeta;
 99        greject = (1.-costeta*costeta)*(1.+b*te    100        greject = (1.-costeta*costeta)*(1.+b*term)/(term*term);
100   } while(greject < G4UniformRand()*grejsup);     101   } while(greject < G4UniformRand()*grejsup);
101                                                   102        
102   sinteta = std::sqrt((1 - costeta)*(1 + coste << 103 
103   fLocalDirection.set(sinteta*cosphi, sinteta* << 104   sinteta = std::sqrt(1.-costeta*costeta);
104   fLocalDirection.rotateUz(dp->GetMomentumDire << 105   G4ThreeVector photoelectrondirection (sinteta*cosphi, sinteta*sinphi, costeta);
105   return fLocalDirection;                      << 106   photoelectrondirection.rotateUz(direction);
                                                   >> 107   return photoelectrondirection;
106 }                                                 108 }
107                                                   109 
108 // ------------------------------------------- << 110 //
109                                                   111 
110 void G4PhotoElectricAngularGeneratorSauterGavr    112 void G4PhotoElectricAngularGeneratorSauterGavrila::PrintGeneratorInformation() const
111 {                                                 113 {
112   G4cout << "\n" << G4endl;                       114   G4cout << "\n" << G4endl;
113   G4cout << "" << G4endl;                         115   G4cout << "" << G4endl;
114   G4cout << "Re-implementation of the photolec    116   G4cout << "Re-implementation of the photolectric angular distribution" << G4endl;
115   G4cout << "developed my M. Maire for the Sta    117   G4cout << "developed my M. Maire for the Standard EM Physics G4PhotoElectricEffect" << G4endl;
116   G4cout << "It computes the theta distributio    118   G4cout << "It computes the theta distribution of the emitted electron, with respect to the" << G4endl;
117   G4cout << "incident Gamma, using the Sauter-    119   G4cout << "incident Gamma, using the Sauter-Gavrila distribution for the K-shell\n" << G4endl;
118 }                                                 120 } 
119                                                   121