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Please see the license in the file LICENSE and URL above * 16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. * 17 // * 17 // * * 18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and * 19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. * 20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or * 21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its * 22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your * 23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. * 24 // ******************************************* 24 // ******************************************************************** 25 // 25 // >> 26 // $Id: G4hBremsstrahlungModel.cc 74020 2013-09-19 13:38:38Z gcosmo $ 26 // 27 // 27 // ------------------------------------------- 28 // ------------------------------------------------------------------- 28 // 29 // 29 // GEANT4 Class file 30 // GEANT4 Class file 30 // 31 // 31 // 32 // 32 // File name: G4hBremsstrahlungModel 33 // File name: G4hBremsstrahlungModel 33 // 34 // 34 // Author: Vladimir Ivanchenko on base 35 // Author: Vladimir Ivanchenko on base of G4MuBremsstrahlungModel 35 // 36 // 36 // Creation date: 28.02.2008 37 // Creation date: 28.02.2008 37 // 38 // 38 // Modifications: 39 // Modifications: 39 // 40 // 40 41 41 // 42 // 42 // Class Description: 43 // Class Description: 43 // 44 // 44 // 45 // 45 // ------------------------------------------- 46 // ------------------------------------------------------------------- 46 // 47 // 47 //....oooOO0OOooo........oooOO0OOooo........oo 48 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 48 //....oooOO0OOooo........oooOO0OOooo........oo 49 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 49 50 50 #include "G4hBremsstrahlungModel.hh" 51 #include "G4hBremsstrahlungModel.hh" 51 #include "G4PhysicalConstants.hh" 52 #include "G4PhysicalConstants.hh" 52 #include "G4SystemOfUnits.hh" 53 #include "G4SystemOfUnits.hh" 53 #include "G4Log.hh" 54 #include "G4Log.hh" 54 #include "G4NistManager.hh" << 55 55 56 using namespace std; 56 using namespace std; 57 57 58 G4hBremsstrahlungModel::G4hBremsstrahlungModel 58 G4hBremsstrahlungModel::G4hBremsstrahlungModel(const G4ParticleDefinition* p, 59 const G4String& nam) 59 const G4String& nam) 60 : G4MuBremsstrahlungModel(p, nam) 60 : G4MuBremsstrahlungModel(p, nam) 61 {} 61 {} 62 62 63 //....oooOO0OOooo........oooOO0OOooo........oo 63 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 64 64 65 G4hBremsstrahlungModel::~G4hBremsstrahlungMode 65 G4hBremsstrahlungModel::~G4hBremsstrahlungModel() 66 {} 66 {} 67 67 68 //....oooOO0OOooo........oooOO0OOooo........oo 68 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 69 69 70 G4double G4hBremsstrahlungModel::ComputeDMicro 70 G4double G4hBremsstrahlungModel::ComputeDMicroscopicCrossSection( 71 G4d 71 G4double tkin, 72 G4d 72 G4double Z, 73 G4d 73 G4double gammaEnergy) 74 // differential cross section 74 // differential cross section 75 { 75 { 76 G4double dxsection = 0.; 76 G4double dxsection = 0.; 77 77 78 if(gammaEnergy > tkin) return dxsection; << 78 if( gammaEnergy > tkin) return dxsection ; 79 // G4cout << "G4hBremsstrahlungModel m= " < 79 // G4cout << "G4hBremsstrahlungModel m= " << mass 80 // << " " << particle->GetParticleName() 80 // << " " << particle->GetParticleName() << G4endl; 81 G4double E = tkin + mass ; 81 G4double E = tkin + mass ; 82 G4double v = gammaEnergy/E ; 82 G4double v = gammaEnergy/E ; 83 G4double delta = 0.5*mass*mass*v/(E-gammaEne << 83 G4double delta = 0.5*mass*mass*v/(E-gammaEnergy) ; 84 G4double rab0=delta*sqrte ; 84 G4double rab0=delta*sqrte ; 85 85 86 G4int iz = std::max(G4lrint(Z), 1); << 86 G4int iz = G4int(Z); >> 87 if(iz < 1) { iz = 1; } 87 88 88 G4double z13 = 1.0/nist->GetZ13(iz); 89 G4double z13 = 1.0/nist->GetZ13(iz); 89 G4double dn = mass*nist->GetA27(iz)/(70.*Me 90 G4double dn = mass*nist->GetA27(iz)/(70.*MeV); 90 91 91 G4double b = (1 == iz) ? bh : btf; << 92 G4double b = btf; >> 93 if(1 == iz) b = bh; 92 94 93 // nucleus contribution logarithm 95 // nucleus contribution logarithm 94 G4double rab1=b*z13; 96 G4double rab1=b*z13; 95 G4double fn=G4Log(rab1/(dn*(electron_mass_c2 97 G4double fn=G4Log(rab1/(dn*(electron_mass_c2+rab0*rab1))* 96 (mass+delta*(dn*sqrte-2.))) ; 98 (mass+delta*(dn*sqrte-2.))) ; 97 fn = std::max(fn, 0.0); << 99 if(fn <0.) fn = 0. ; 98 100 99 G4double x = 1.0 - v; 101 G4double x = 1.0 - v; 100 if(particle->GetPDGSpin() != 0) { x += 0.75* 102 if(particle->GetPDGSpin() != 0) { x += 0.75*v*v; } 101 103 102 dxsection = coeff*x*Z*Z*fn/gammaEnergy; 104 dxsection = coeff*x*Z*Z*fn/gammaEnergy; 103 105 104 return dxsection; 106 return dxsection; 105 } 107 } 106 108 107 //....oooOO0OOooo........oooOO0OOooo........oo 109 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 108 110