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Geant4/processes/electromagnetic/highenergy/src/G4hBremsstrahlungModel.cc

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Diff markup

Differences between /processes/electromagnetic/highenergy/src/G4hBremsstrahlungModel.cc (Version 11.3.0) and /processes/electromagnetic/highenergy/src/G4hBremsstrahlungModel.cc (Version 9.3)


  1 //                                                  1 //
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 25 //                                                 25 //
                                                   >>  26 // $Id: G4hBremsstrahlungModel.cc,v 1.3 2008/07/22 16:15:16 vnivanch Exp $
                                                   >>  27 // GEANT4 tag $Name: geant4-09-02 $
 26 //                                                 28 //
 27 // -------------------------------------------     29 // -------------------------------------------------------------------
 28 //                                                 30 //
 29 // GEANT4 Class file                               31 // GEANT4 Class file
 30 //                                                 32 //
 31 //                                                 33 //
 32 // File name:     G4hBremsstrahlungModel           34 // File name:     G4hBremsstrahlungModel
 33 //                                                 35 //
 34 // Author:        Vladimir Ivanchenko on base      36 // Author:        Vladimir Ivanchenko on base of G4MuBremsstrahlungModel
 35 //                                                 37 //
 36 // Creation date: 28.02.2008                       38 // Creation date: 28.02.2008
 37 //                                                 39 //
 38 // Modifications:                                  40 // Modifications:
 39 //                                                 41 //
 40                                                    42 
 41 //                                                 43 //
 42 // Class Description:                              44 // Class Description:
 43 //                                                 45 //
 44 //                                                 46 //
 45 // -------------------------------------------     47 // -------------------------------------------------------------------
 46 //                                                 48 //
 47 //....oooOO0OOooo........oooOO0OOooo........oo     49 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 48 //....oooOO0OOooo........oooOO0OOooo........oo     50 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 49                                                    51 
 50 #include "G4hBremsstrahlungModel.hh"               52 #include "G4hBremsstrahlungModel.hh"
 51 #include "G4PhysicalConstants.hh"              << 
 52 #include "G4SystemOfUnits.hh"                  << 
 53 #include "G4Log.hh"                            << 
 54 #include "G4NistManager.hh"                    << 
 55                                                    53 
 56 using namespace std;                               54 using namespace std;
 57                                                    55 
 58 G4hBremsstrahlungModel::G4hBremsstrahlungModel     56 G4hBremsstrahlungModel::G4hBremsstrahlungModel(const G4ParticleDefinition* p,
 59                  const G4String& nam)              57                  const G4String& nam)
 60   : G4MuBremsstrahlungModel(p, nam)                58   : G4MuBremsstrahlungModel(p, nam)
 61 {}                                                 59 {}
 62                                                    60 
 63 //....oooOO0OOooo........oooOO0OOooo........oo     61 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 64                                                    62 
 65 G4hBremsstrahlungModel::~G4hBremsstrahlungMode     63 G4hBremsstrahlungModel::~G4hBremsstrahlungModel()
 66 {}                                                 64 {}
 67                                                    65 
 68 //....oooOO0OOooo........oooOO0OOooo........oo     66 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 69                                                    67 
 70 G4double G4hBremsstrahlungModel::ComputeDMicro     68 G4double G4hBremsstrahlungModel::ComputeDMicroscopicCrossSection(
 71                                            G4d     69                                            G4double tkin,
 72                                            G4d     70                                            G4double Z,
 73                                            G4d     71                                            G4double gammaEnergy)
 74 //  differential cross section                     72 //  differential cross section
 75 {                                                  73 {
 76   G4double dxsection = 0.;                         74   G4double dxsection = 0.;
 77                                                    75 
 78   if(gammaEnergy > tkin) return dxsection;     <<  76   if( gammaEnergy > tkin) return dxsection ;
 79   //  G4cout << "G4hBremsstrahlungModel m= " <     77   //  G4cout << "G4hBremsstrahlungModel m= " << mass 
 80   //   << "  " << particle->GetParticleName()      78   //   << "  " << particle->GetParticleName() << G4endl;
 81   G4double E = tkin + mass ;                       79   G4double E = tkin + mass ;
 82   G4double v = gammaEnergy/E ;                     80   G4double v = gammaEnergy/E ;
 83   G4double delta = 0.5*mass*mass*v/(E-gammaEne <<  81   G4double delta = 0.5*mass*mass*v/(E-gammaEnergy) ;
 84   G4double rab0=delta*sqrte ;                      82   G4double rab0=delta*sqrte ;
 85                                                    83 
 86   G4int iz = std::max(G4lrint(Z), 1);          <<  84   G4int iz = G4int(Z);
                                                   >>  85   if(iz < 1) iz = 1;
 87                                                    86 
 88   G4double z13 = 1.0/nist->GetZ13(iz);             87   G4double z13 = 1.0/nist->GetZ13(iz);
 89   G4double dn  = mass*nist->GetA27(iz)/(70.*Me     88   G4double dn  = mass*nist->GetA27(iz)/(70.*MeV);
 90                                                    89 
 91   G4double b = (1 == iz) ? bh : btf;           <<  90   G4double    b = btf;
                                                   >>  91   if(1 == iz) b = bh;
 92                                                    92 
 93   // nucleus contribution logarithm                93   // nucleus contribution logarithm
 94   G4double rab1=b*z13;                             94   G4double rab1=b*z13;
 95   G4double fn=G4Log(rab1/(dn*(electron_mass_c2 <<  95   G4double fn=log(rab1/(dn*(electron_mass_c2+rab0*rab1))*
 96               (mass+delta*(dn*sqrte-2.))) ;        96               (mass+delta*(dn*sqrte-2.))) ;
 97   fn = std::max(fn, 0.0);                      <<  97   if(fn <0.) fn = 0. ;
 98                                                    98 
 99   G4double x = 1.0 - v;                            99   G4double x = 1.0 - v;
100   if(particle->GetPDGSpin() != 0) { x += 0.75* << 100   if(particle->GetPDGSpin() != 0) x += 0.75*v*v;
101                                                   101 
102   dxsection = coeff*x*Z*Z*fn/gammaEnergy;         102   dxsection = coeff*x*Z*Z*fn/gammaEnergy;
103                                                   103 
104   return dxsection;                               104   return dxsection;
105 }                                                 105 }
106                                                   106 
107 //....oooOO0OOooo........oooOO0OOooo........oo    107 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
108                                                   108