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>> 26 // $Id: G4DNABornAngle.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: G4DNABornAngle 33 // File name: G4DNABornAngle
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 "G4DNABornAngle.hh" 50 #include "G4DNABornAngle.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 G4DNABornAngle::G4DNABornAngle(const G4String& 59 G4DNABornAngle::G4DNABornAngle(const G4String&)
59 : G4VEmAngularDistribution("deltaBorn") 60 : G4VEmAngularDistribution("deltaBorn")
60 { 61 {
61 fElectron = G4Electron::Electron(); 62 fElectron = G4Electron::Electron();
62 } 63 }
63 64
64 G4DNABornAngle::~G4DNABornAngle() 65 G4DNABornAngle::~G4DNABornAngle()
65 = default; << 66 {}
66 67
67 G4ThreeVector& 68 G4ThreeVector&
68 G4DNABornAngle::SampleDirectionForShell(const 69 G4DNABornAngle::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 if (dp->GetDefinition() == fElectron) 76 if (dp->GetDefinition() == fElectron)
77 { 77 {
78 if (secKinetic < 50.*eV) cosTheta = (2.* 78 if (secKinetic < 50.*eV) cosTheta = (2.*G4UniformRand())-1.;
79 else if (secKinetic <= 200.*eV) 79 else if (secKinetic <= 200.*eV)
80 { 80 {
81 if (G4UniformRand() <= 0.1) cosTheta = (2. 81 if (G4UniformRand() <= 0.1) cosTheta = (2.*G4UniformRand())-1.;
82 else cosTheta = G4UniformRand()*(std::sqrt 82 else cosTheta = G4UniformRand()*(std::sqrt(2.)/2);
83 } 83 }
84 else 84 else
85 { 85 {
86 G4double sin2O = 86 G4double sin2O =
87 (1.-secKinetic/k)/(1.+secKinetic/(2.*ele 87 (1.-secKinetic/k)/(1.+secKinetic/(2.*electron_mass_c2));
88 cosTheta = std::sqrt(1.-sin2O); 88 cosTheta = std::sqrt(1.-sin2O);
89 } 89 }
90 } 90 }
91 else 91 else
92 { 92 {
93 G4double tau = k/dp->GetDefinition()->Ge << 93 G4double mass = dp->GetDefinition()->GetPDGMass();
94 G4double maxSecKinetic = 2.* electron_ma << 94 G4double maxSecKinetic = 4.* (electron_mass_c2 / mass) * k;
>> 95
>> 96 // cosTheta = std::sqrt(secKinetic / maxSecKinetic);
95 97
96 // Restriction below 100 eV from Emfietz 98 // Restriction below 100 eV from Emfietzoglou (2000)
97 99
98 if (secKinetic>100*eV) cosTheta = std::m << 100 if (secKinetic>100*eV) cosTheta = std::sqrt(secKinetic / maxSecKinetic);
99 else cosTheta = (2.*G4UniformRand())-1.; 101 else cosTheta = (2.*G4UniformRand())-1.;
100 } 102 }
101 103
102 G4double sint = sqrt((1.0 - cosTheta)*(1.0 + 104 G4double sint = sqrt((1.0 - cosTheta)*(1.0 + cosTheta));
103 G4double phi = twopi*G4UniformRand(); 105 G4double phi = twopi*G4UniformRand();
104 106
105 fLocalDirection.set(sint*cos(phi), sint*sin( 107 fLocalDirection.set(sint*cos(phi), sint*sin(phi), cosTheta);
106 fLocalDirection.rotateUz(dp->GetMomentumDire 108 fLocalDirection.rotateUz(dp->GetMomentumDirection());
107 109
108 return fLocalDirection; 110 return fLocalDirection;
109 } 111 }
110 112
111 G4ThreeVector& 113 G4ThreeVector&
112 G4DNABornAngle::SampleDirection(const G4Dynami 114 G4DNABornAngle::SampleDirection(const G4DynamicParticle* dp,
113 G4double secEkin, G4int Z, 115 G4double secEkin, G4int Z,
114 const G4Material* mat) 116 const G4Material* mat)
115 { 117 {
116 return SampleDirectionForShell(dp, secEkin, 118 return SampleDirectionForShell(dp, secEkin, Z, 0, mat);
117 } 119 }
118 120
119 void G4DNABornAngle::PrintGeneratorInformation 121 void G4DNABornAngle::PrintGeneratorInformation() const
120 {} 122 {}
121 123