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>> 26 // $Id: G4hBremsstrahlungModel.cc 66996 2013-01-29 14:50:52Z 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 "G4NistManager.hh" <<
55 54
56 using namespace std; 55 using namespace std;
57 56
58 G4hBremsstrahlungModel::G4hBremsstrahlungModel 57 G4hBremsstrahlungModel::G4hBremsstrahlungModel(const G4ParticleDefinition* p,
59 const G4String& nam) 58 const G4String& nam)
60 : G4MuBremsstrahlungModel(p, nam) 59 : G4MuBremsstrahlungModel(p, nam)
61 {} 60 {}
62 61
63 //....oooOO0OOooo........oooOO0OOooo........oo 62 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
64 63
65 G4hBremsstrahlungModel::~G4hBremsstrahlungMode 64 G4hBremsstrahlungModel::~G4hBremsstrahlungModel()
66 {} 65 {}
67 66
68 //....oooOO0OOooo........oooOO0OOooo........oo 67 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
69 68
70 G4double G4hBremsstrahlungModel::ComputeDMicro 69 G4double G4hBremsstrahlungModel::ComputeDMicroscopicCrossSection(
71 G4d 70 G4double tkin,
72 G4d 71 G4double Z,
73 G4d 72 G4double gammaEnergy)
74 // differential cross section 73 // differential cross section
75 { 74 {
76 G4double dxsection = 0.; 75 G4double dxsection = 0.;
77 76
78 if(gammaEnergy > tkin) return dxsection; << 77 if( gammaEnergy > tkin) return dxsection ;
79 // G4cout << "G4hBremsstrahlungModel m= " < 78 // G4cout << "G4hBremsstrahlungModel m= " << mass
80 // << " " << particle->GetParticleName() 79 // << " " << particle->GetParticleName() << G4endl;
81 G4double E = tkin + mass ; 80 G4double E = tkin + mass ;
82 G4double v = gammaEnergy/E ; 81 G4double v = gammaEnergy/E ;
83 G4double delta = 0.5*mass*mass*v/(E-gammaEne << 82 G4double delta = 0.5*mass*mass*v/(E-gammaEnergy) ;
84 G4double rab0=delta*sqrte ; 83 G4double rab0=delta*sqrte ;
85 84
86 G4int iz = std::max(G4lrint(Z), 1); << 85 G4int iz = G4int(Z);
>> 86 if(iz < 1) iz = 1;
87 87
88 G4double z13 = 1.0/nist->GetZ13(iz); 88 G4double z13 = 1.0/nist->GetZ13(iz);
89 G4double dn = mass*nist->GetA27(iz)/(70.*Me 89 G4double dn = mass*nist->GetA27(iz)/(70.*MeV);
90 90
91 G4double b = (1 == iz) ? bh : btf; << 91 G4double b = btf;
>> 92 if(1 == iz) b = bh;
92 93
93 // nucleus contribution logarithm 94 // nucleus contribution logarithm
94 G4double rab1=b*z13; 95 G4double rab1=b*z13;
95 G4double fn=G4Log(rab1/(dn*(electron_mass_c2 << 96 G4double fn=log(rab1/(dn*(electron_mass_c2+rab0*rab1))*
96 (mass+delta*(dn*sqrte-2.))) ; 97 (mass+delta*(dn*sqrte-2.))) ;
97 fn = std::max(fn, 0.0); << 98 if(fn <0.) fn = 0. ;
98 99
99 G4double x = 1.0 - v; 100 G4double x = 1.0 - v;
100 if(particle->GetPDGSpin() != 0) { x += 0.75* << 101 if(particle->GetPDGSpin() != 0) x += 0.75*v*v;
101 102
102 dxsection = coeff*x*Z*Z*fn/gammaEnergy; 103 dxsection = coeff*x*Z*Z*fn/gammaEnergy;
103 104
104 return dxsection; 105 return dxsection;
105 } 106 }
106 107
107 //....oooOO0OOooo........oooOO0OOooo........oo 108 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
108 109