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>> 26 // $Id: G4DNARuddAngle.cc 68380 2013-03-22 18:39:29Z vnivanch $
26 // 27 //
27 // ------------------------------------------- 28 // -------------------------------------------------------------------
28 // 29 //
29 // GEANT4 Class file 30 // GEANT4 Class file
30 // 31 //
31 // 32 //
32 // File name: G4DNARuddAngle 33 // File name: G4DNARuddAngle
33 // 34 //
34 // Author: Vladimir Ivantcheko 35 // Author: Vladimir Ivantcheko
35 // 36 //
36 // Creation date: 23 August 2013 37 // Creation date: 23 August 2013
37 // 38 //
38 // Modifications: 39 // Modifications:
39 // 40 //
40 // Class Description: 41 // Class Description:
41 // 42 //
42 // Delta-electron Angular Distribution Generat 43 // Delta-electron Angular Distribution Generation
43 // 44 //
44 // Class Description: End 45 // Class Description: End
45 // 46 //
46 // ------------------------------------------- 47 // -------------------------------------------------------------------
47 // 48 //
48 49
49 #include "G4DNARuddAngle.hh" 50 #include "G4DNARuddAngle.hh"
50 #include "G4PhysicalConstants.hh" 51 #include "G4PhysicalConstants.hh"
51 #include "Randomize.hh" 52 #include "Randomize.hh"
52 #include "G4ParticleDefinition.hh" 53 #include "G4ParticleDefinition.hh"
53 #include "G4Electron.hh" 54 #include "G4Electron.hh"
54 #include "G4SystemOfUnits.hh" 55 #include "G4SystemOfUnits.hh"
55 56
56 using namespace std; 57 using namespace std;
57 58
58 G4DNARuddAngle::G4DNARuddAngle(const G4String& 59 G4DNARuddAngle::G4DNARuddAngle(const G4String&)
59 : G4VEmAngularDistribution("deltaRudd") 60 : G4VEmAngularDistribution("deltaRudd")
60 { 61 {
61 fElectron = G4Electron::Electron(); 62 fElectron = G4Electron::Electron();
62 } 63 }
63 64
64 G4DNARuddAngle::~G4DNARuddAngle() 65 G4DNARuddAngle::~G4DNARuddAngle()
65 = default; << 66 {}
66 67
67 G4ThreeVector& 68 G4ThreeVector&
68 G4DNARuddAngle::SampleDirectionForShell(const 69 G4DNARuddAngle::SampleDirectionForShell(const G4DynamicParticle* dp,
69 G4double secKinetic, G4int, 70 G4double secKinetic, G4int,
70 G4int, 71 G4int,
71 const G4Material*) 72 const G4Material*)
72 { 73 {
73 G4double k = dp->GetKineticEnergy(); 74 G4double k = dp->GetKineticEnergy();
74 G4double cosTheta = 1.0; 75 G4double cosTheta = 1.0;
75 76
76 const G4ParticleDefinition* particle = dp->G 77 const G4ParticleDefinition* particle = dp->GetDefinition();
77 G4double mass = particle->GetPDGMass(); 78 G4double mass = particle->GetPDGMass();
78 79
79 G4double maximumEnergyTransfer = k; 80 G4double maximumEnergyTransfer = k;
80 if(particle == fElectron) { maximumEnergyTra 81 if(particle == fElectron) { maximumEnergyTransfer *= 0.5; }
81 else if(mass > MeV) { 82 else if(mass > MeV) {
82 G4double ratio = electron_mass_c2/mass; 83 G4double ratio = electron_mass_c2/mass;
83 G4double tau = k/mass; 84 G4double tau = k/mass;
84 maximumEnergyTransfer = 2.0*electron_mass_ 85 maximumEnergyTransfer = 2.0*electron_mass_c2*tau*(tau + 2.) /
85 (1. + 2.0*(tau + 1.)*ratio + ratio*ratio 86 (1. + 2.0*(tau + 1.)*ratio + ratio*ratio);
86 87
87 } 88 }
88 89
89 if (secKinetic>100*eV && secKinetic <= maxim 90 if (secKinetic>100*eV && secKinetic <= maximumEnergyTransfer) {
90 cosTheta = std::sqrt(secKinetic / maximumE 91 cosTheta = std::sqrt(secKinetic / maximumEnergyTransfer);
91 } else { 92 } else {
92 cosTheta = (2.*G4UniformRand())-1.; 93 cosTheta = (2.*G4UniformRand())-1.;
93 } 94 }
94 95
95 G4double sint = sqrt((1.0 - cosTheta)*(1.0 + 96 G4double sint = sqrt((1.0 - cosTheta)*(1.0 + cosTheta));
96 G4double phi = twopi*G4UniformRand(); 97 G4double phi = twopi*G4UniformRand();
97 98
98 fLocalDirection.set(sint*cos(phi), sint*sin( 99 fLocalDirection.set(sint*cos(phi), sint*sin(phi), cosTheta);
99 fLocalDirection.rotateUz(dp->GetMomentumDire 100 fLocalDirection.rotateUz(dp->GetMomentumDirection());
100 101
101 return fLocalDirection; 102 return fLocalDirection;
102 } 103 }
103 104
104 G4ThreeVector& 105 G4ThreeVector&
105 G4DNARuddAngle::SampleDirection(const G4Dynami 106 G4DNARuddAngle::SampleDirection(const G4DynamicParticle* dp,
106 G4double secEkin, G4int Z, 107 G4double secEkin, G4int Z,
107 const G4Material* mat) 108 const G4Material* mat)
108 { 109 {
109 return SampleDirectionForShell(dp, secEkin, 110 return SampleDirectionForShell(dp, secEkin, Z, 0, mat);
110 } 111 }
111 112
112 void G4DNARuddAngle::PrintGeneratorInformation 113 void G4DNARuddAngle::PrintGeneratorInformation() const
113 {} 114 {}
114 115