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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: G4DNABornAngle 32 // File name: G4DNABornAngle
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 "G4DNABornAngle.hh" 49 #include "G4DNABornAngle.hh"
50 #include "G4PhysicalConstants.hh" 50 #include "G4PhysicalConstants.hh"
51 #include "Randomize.hh" 51 #include "Randomize.hh"
52 #include "G4ParticleDefinition.hh" 52 #include "G4ParticleDefinition.hh"
53 #include "G4Electron.hh" 53 #include "G4Electron.hh"
54 #include "G4SystemOfUnits.hh" 54 #include "G4SystemOfUnits.hh"
55 55
56 using namespace std; 56 using namespace std;
57 57
58 G4DNABornAngle::G4DNABornAngle(const G4String& 58 G4DNABornAngle::G4DNABornAngle(const G4String&)
59 : G4VEmAngularDistribution("deltaBorn") 59 : G4VEmAngularDistribution("deltaBorn")
60 { 60 {
61 fElectron = G4Electron::Electron(); 61 fElectron = G4Electron::Electron();
62 } 62 }
63 63
64 G4DNABornAngle::~G4DNABornAngle() 64 G4DNABornAngle::~G4DNABornAngle()
65 = default; 65 = default;
66 66
67 G4ThreeVector& 67 G4ThreeVector&
68 G4DNABornAngle::SampleDirectionForShell(const 68 G4DNABornAngle::SampleDirectionForShell(const G4DynamicParticle* dp,
69 G4double secKinetic, G4int, 69 G4double secKinetic, G4int,
70 G4int, 70 G4int,
71 const G4Material*) 71 const G4Material*)
72 { 72 {
73 G4double k = dp->GetKineticEnergy(); 73 G4double k = dp->GetKineticEnergy();
74 G4double cosTheta = 1.0; 74 G4double cosTheta = 1.0;
75 <<
76 if (dp->GetDefinition() == fElectron) 75 if (dp->GetDefinition() == fElectron)
77 { 76 {
78 if (secKinetic < 50.*eV) cosTheta = (2.* 77 if (secKinetic < 50.*eV) cosTheta = (2.*G4UniformRand())-1.;
79 else if (secKinetic <= 200.*eV) 78 else if (secKinetic <= 200.*eV)
80 { 79 {
81 if (G4UniformRand() <= 0.1) cosTheta = (2. 80 if (G4UniformRand() <= 0.1) cosTheta = (2.*G4UniformRand())-1.;
82 else cosTheta = G4UniformRand()*(std::sqrt 81 else cosTheta = G4UniformRand()*(std::sqrt(2.)/2);
83 } 82 }
84 else 83 else
85 { 84 {
86 G4double sin2O = 85 G4double sin2O =
87 (1.-secKinetic/k)/(1.+secKinetic/(2.*ele 86 (1.-secKinetic/k)/(1.+secKinetic/(2.*electron_mass_c2));
88 cosTheta = std::sqrt(1.-sin2O); 87 cosTheta = std::sqrt(1.-sin2O);
89 } 88 }
90 } 89 }
91 else 90 else
92 { 91 {
93 G4double tau = k/dp->GetDefinition()->Ge << 92 G4double mass = dp->GetDefinition()->GetPDGMass();
94 G4double maxSecKinetic = 2.* electron_ma << 93 G4double maxSecKinetic = 4.* (electron_mass_c2 / mass) * k;
>> 94
>> 95 // cosTheta = std::sqrt(secKinetic / maxSecKinetic);
95 96
96 // Restriction below 100 eV from Emfietz 97 // Restriction below 100 eV from Emfietzoglou (2000)
97 98
98 if (secKinetic>100*eV) cosTheta = std::m << 99 if (secKinetic>100*eV) cosTheta = std::sqrt(secKinetic / maxSecKinetic);
99 else cosTheta = (2.*G4UniformRand())-1.; 100 else cosTheta = (2.*G4UniformRand())-1.;
100 } 101 }
101 102
102 G4double sint = sqrt((1.0 - cosTheta)*(1.0 + 103 G4double sint = sqrt((1.0 - cosTheta)*(1.0 + cosTheta));
103 G4double phi = twopi*G4UniformRand(); 104 G4double phi = twopi*G4UniformRand();
104 105
105 fLocalDirection.set(sint*cos(phi), sint*sin( 106 fLocalDirection.set(sint*cos(phi), sint*sin(phi), cosTheta);
106 fLocalDirection.rotateUz(dp->GetMomentumDire 107 fLocalDirection.rotateUz(dp->GetMomentumDirection());
107 108
108 return fLocalDirection; 109 return fLocalDirection;
109 } 110 }
110 111
111 G4ThreeVector& 112 G4ThreeVector&
112 G4DNABornAngle::SampleDirection(const G4Dynami 113 G4DNABornAngle::SampleDirection(const G4DynamicParticle* dp,
113 G4double secEkin, G4int Z, 114 G4double secEkin, G4int Z,
114 const G4Material* mat) 115 const G4Material* mat)
115 { 116 {
116 return SampleDirectionForShell(dp, secEkin, 117 return SampleDirectionForShell(dp, secEkin, Z, 0, mat);
117 } 118 }
118 119
119 void G4DNABornAngle::PrintGeneratorInformation 120 void G4DNABornAngle::PrintGeneratorInformation() const
120 {} 121 {}
121 122