| Geant4 Cross Reference |
1 // 1
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25 //
26 //
27 // -------------------------------------------
28 //
29 // GEANT4 Class file
30 //
31 //
32 // File name: G4DNABornAngle
33 //
34 // Author: Vladimir Ivantcheko
35 //
36 // Creation date: 23 August 2013
37 //
38 // Modifications:
39 //
40 // Class Description:
41 //
42 // Delta-electron Angular Distribution Generat
43 //
44 // Class Description: End
45 //
46 // -------------------------------------------
47 //
48
49 #include "G4DNABornAngle.hh"
50 #include "G4PhysicalConstants.hh"
51 #include "Randomize.hh"
52 #include "G4ParticleDefinition.hh"
53 #include "G4Electron.hh"
54 #include "G4SystemOfUnits.hh"
55
56 using namespace std;
57
58 G4DNABornAngle::G4DNABornAngle(const G4String&
59 : G4VEmAngularDistribution("deltaBorn")
60 {
61 fElectron = G4Electron::Electron();
62 }
63
64 G4DNABornAngle::~G4DNABornAngle()
65 = default;
66
67 G4ThreeVector&
68 G4DNABornAngle::SampleDirectionForShell(const
69 G4double secKinetic, G4int,
70 G4int,
71 const G4Material*)
72 {
73 G4double k = dp->GetKineticEnergy();
74 G4double cosTheta = 1.0;
75
76 if (dp->GetDefinition() == fElectron)
77 {
78 if (secKinetic < 50.*eV) cosTheta = (2.*
79 else if (secKinetic <= 200.*eV)
80 {
81 if (G4UniformRand() <= 0.1) cosTheta = (2.
82 else cosTheta = G4UniformRand()*(std::sqrt
83 }
84 else
85 {
86 G4double sin2O =
87 (1.-secKinetic/k)/(1.+secKinetic/(2.*ele
88 cosTheta = std::sqrt(1.-sin2O);
89 }
90 }
91 else
92 {
93 G4double tau = k/dp->GetDefinition()->Ge
94 G4double maxSecKinetic = 2.* electron_ma
95
96 // Restriction below 100 eV from Emfietz
97
98 if (secKinetic>100*eV) cosTheta = std::m
99 else cosTheta = (2.*G4UniformRand())-1.;
100 }
101
102 G4double sint = sqrt((1.0 - cosTheta)*(1.0 +
103 G4double phi = twopi*G4UniformRand();
104
105 fLocalDirection.set(sint*cos(phi), sint*sin(
106 fLocalDirection.rotateUz(dp->GetMomentumDire
107
108 return fLocalDirection;
109 }
110
111 G4ThreeVector&
112 G4DNABornAngle::SampleDirection(const G4Dynami
113 G4double secEkin, G4int Z,
114 const G4Material* mat)
115 {
116 return SampleDirectionForShell(dp, secEkin,
117 }
118
119 void G4DNABornAngle::PrintGeneratorInformation
120 {}
121