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25 // 25 //
26 // 26 //
27 // ------------------------------------------- 27 // -------------------------------------------------------------------
28 // 28 //
29 // GEANT4 Class file 29 // GEANT4 Class file
30 // 30 //
31 // 31 //
32 // File name: G4DeltaAngleFreeScat 32 // File name: G4DeltaAngleFreeScat
33 // 33 //
34 // Author: Vladimir Ivantcheko 34 // Author: Vladimir Ivantcheko
35 // 35 //
36 // Creation date: 23 August 2013 36 // Creation date: 23 August 2013
37 // 37 //
38 // Modifications: 38 // Modifications:
39 // 39 //
40 // Class Description: 40 // Class Description:
41 // 41 //
42 // Delta-electron Angular Distribution Generat 42 // Delta-electron Angular Distribution Generation
43 // 43 //
44 // Class Description: End 44 // Class Description: End
45 // 45 //
46 // ------------------------------------------- 46 // -------------------------------------------------------------------
47 // 47 //
48 48
49 #include "G4DeltaAngleFreeScat.hh" 49 #include "G4DeltaAngleFreeScat.hh"
50 #include "G4PhysicalConstants.hh" 50 #include "G4PhysicalConstants.hh"
51 #include "Randomize.hh" 51 #include "Randomize.hh"
52 52
53 using namespace std; 53 using namespace std;
54 54
55 G4DeltaAngleFreeScat::G4DeltaAngleFreeScat(con 55 G4DeltaAngleFreeScat::G4DeltaAngleFreeScat(const G4String&)
56 : G4VEmAngularDistribution("deltaFree") 56 : G4VEmAngularDistribution("deltaFree")
57 {} 57 {}
58 58
59 G4DeltaAngleFreeScat::~G4DeltaAngleFreeScat() << 59 G4DeltaAngleFreeScat::~G4DeltaAngleFreeScat()
>> 60 {}
60 61
61 G4ThreeVector& 62 G4ThreeVector&
62 G4DeltaAngleFreeScat::SampleDirection(const G4 63 G4DeltaAngleFreeScat::SampleDirection(const G4DynamicParticle* dp,
63 G4double kinEnergyFinal, G4int, 64 G4double kinEnergyFinal, G4int,
64 const G4Material*) 65 const G4Material*)
65 { 66 {
66 G4double deltaMomentum = 67 G4double deltaMomentum =
67 sqrt(kinEnergyFinal*(kinEnergyFinal + 2*el 68 sqrt(kinEnergyFinal*(kinEnergyFinal + 2*electron_mass_c2));
68 69
69 G4double costet = kinEnergyFinal*(dp->GetTot 70 G4double costet = kinEnergyFinal*(dp->GetTotalEnergy() + electron_mass_c2) /
70 (deltaMomentum * dp->GetTotalMomentum()); 71 (deltaMomentum * dp->GetTotalMomentum());
71 72
72 G4double phi = G4UniformRand()*twopi; 73 G4double phi = G4UniformRand()*twopi;
73 G4double sintet = sqrt((1 - costet)*(1 + cos 74 G4double sintet = sqrt((1 - costet)*(1 + costet));
74 75
75 fLocalDirection.set(sintet*cos(phi), sintet* 76 fLocalDirection.set(sintet*cos(phi), sintet*sin(phi), costet);
76 fLocalDirection.rotateUz(dp->GetMomentumDire 77 fLocalDirection.rotateUz(dp->GetMomentumDirection());
77 78
78 return fLocalDirection; 79 return fLocalDirection;
79 } 80 }
80 81
81 void G4DeltaAngleFreeScat::PrintGeneratorInfor 82 void G4DeltaAngleFreeScat::PrintGeneratorInformation() const
82 {} 83 {}
83 84