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>> 26 // $Id: G4eeToPGammaModel.cc 82961 2014-07-21 09:20:49Z gcosmo $
26 // 27 //
27 // ------------------------------------------- 28 // -------------------------------------------------------------------
28 // 29 //
29 // GEANT4 Class header file 30 // GEANT4 Class header file
30 // 31 //
31 // 32 //
32 // File name: G4eeToPGammaModel 33 // File name: G4eeToPGammaModel
33 // 34 //
34 // Author: Vladimir Ivanchenko 35 // Author: Vladimir Ivanchenko
35 // 36 //
36 // Creation date: 25.10.2003 37 // Creation date: 25.10.2003
37 // 38 //
38 // Modifications: 39 // Modifications:
39 // 40 //
40 // 41 //
41 // ------------------------------------------- 42 // -------------------------------------------------------------------
42 // 43 //
43 44
44 45
45 //....oooOO0OOooo........oooOO0OOooo........oo 46 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
46 //....oooOO0OOooo........oooOO0OOooo........oo 47 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
47 48
48 #include "G4eeToPGammaModel.hh" 49 #include "G4eeToPGammaModel.hh"
49 #include "Randomize.hh" 50 #include "Randomize.hh"
50 #include "G4PhysicalConstants.hh" 51 #include "G4PhysicalConstants.hh"
51 #include "G4SystemOfUnits.hh" 52 #include "G4SystemOfUnits.hh"
52 #include "G4PionZero.hh" 53 #include "G4PionZero.hh"
53 #include "G4Eta.hh" 54 #include "G4Eta.hh"
54 #include "G4Gamma.hh" 55 #include "G4Gamma.hh"
55 #include "G4DynamicParticle.hh" 56 #include "G4DynamicParticle.hh"
56 #include "G4PhysicsVector.hh" 57 #include "G4PhysicsVector.hh"
57 #include "G4PhysicsLinearVector.hh" 58 #include "G4PhysicsLinearVector.hh"
58 #include "G4eeCrossSections.hh" 59 #include "G4eeCrossSections.hh"
59 60
60 //....oooOO0OOooo........oooOO0OOooo........oo 61 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
61 62
62 using namespace std; 63 using namespace std;
63 64
64 G4eeToPGammaModel::G4eeToPGammaModel(G4eeCross 65 G4eeToPGammaModel::G4eeToPGammaModel(G4eeCrossSections* cr,
65 const G4String& npart, 66 const G4String& npart,
66 G4double maxkinEnergy, 67 G4double maxkinEnergy,
67 G4double binWidth) 68 G4double binWidth)
68 : G4Vee2hadrons(cr, 69 : G4Vee2hadrons(cr,
69 npart=="pi0" ? 782.62*MeV:1019.46*MeV, 70 npart=="pi0" ? 782.62*MeV:1019.46*MeV,
70 maxkinEnergy, 71 maxkinEnergy,
71 binWidth) 72 binWidth)
72 { 73 {
73 G4cout << "####G4eeToPGammaModel & particle: 74 G4cout << "####G4eeToPGammaModel & particle:" << npart
74 << "####" << G4endl; 75 << "####" << G4endl;
75 76
76 pi0 = G4PionZero::PionZero(); 77 pi0 = G4PionZero::PionZero();
77 if(npart == "pi0") { 78 if(npart == "pi0") {
78 massR = 782.62*MeV; 79 massR = 782.62*MeV;
79 particle = pi0; 80 particle = pi0;
80 } else { 81 } else {
81 massR = 1019.46*MeV; 82 massR = 1019.46*MeV;
82 particle = G4Eta::Eta(); 83 particle = G4Eta::Eta();
83 } 84 }
84 massP = particle->GetPDGMass(); 85 massP = particle->GetPDGMass();
>> 86
85 } 87 }
86 88
87 //....oooOO0OOooo........oooOO0OOooo........oo 89 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
88 90
89 G4eeToPGammaModel::~G4eeToPGammaModel() 91 G4eeToPGammaModel::~G4eeToPGammaModel()
90 {} 92 {}
91 93
92 //....oooOO0OOooo........oooOO0OOooo........oo 94 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
93 95
94 G4double G4eeToPGammaModel::PeakEnergy() const 96 G4double G4eeToPGammaModel::PeakEnergy() const
95 { 97 {
96 return massR; 98 return massR;
97 } 99 }
98 100
99 //....oooOO0OOooo........oooOO0OOooo........oo 101 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
100 102
101 G4double G4eeToPGammaModel::ComputeCrossSectio 103 G4double G4eeToPGammaModel::ComputeCrossSection(G4double e) const
102 { 104 {
103 G4double xs; 105 G4double xs;
104 if(particle == pi0) xs = cross->CrossSection 106 if(particle == pi0) xs = cross->CrossSectionPi0G(e);
105 else xs = cross->CrossSection 107 else xs = cross->CrossSectionEtaG(e);
106 return xs; 108 return xs;
107 } 109 }
108 110
109 //....oooOO0OOooo........oooOO0OOooo........oo 111 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
110 112
111 void G4eeToPGammaModel::SampleSecondaries(std: 113 void G4eeToPGammaModel::SampleSecondaries(std::vector<G4DynamicParticle*>* newp,
112 G4double e, const G4ThreeVector& directi 114 G4double e, const G4ThreeVector& direction)
113 { 115 {
114 G4double egam = 0.5*e*(1.0 - massP*massP/(ma 116 G4double egam = 0.5*e*(1.0 - massP*massP/(massR*massR));
115 G4double tkin = e - egam - massP; 117 G4double tkin = e - egam - massP;
116 if(tkin < 0.0) tkin = 0.0; 118 if(tkin < 0.0) tkin = 0.0;
117 G4double cost; 119 G4double cost;
118 do { 120 do {
119 cost = 2.0*G4UniformRand() - 1.0; 121 cost = 2.0*G4UniformRand() - 1.0;
120 // Loop checking, 07-Aug-2015, Vladimir Iv <<
121 } while( 2.0*G4UniformRand() > 1.0 + cost*co 122 } while( 2.0*G4UniformRand() > 1.0 + cost*cost );
122 123
123 G4double sint = sqrt(1.0 - cost*cost); 124 G4double sint = sqrt(1.0 - cost*cost);
124 G4double phi = twopi * G4UniformRand(); 125 G4double phi = twopi * G4UniformRand();
125 126
126 G4ThreeVector dir(sint*cos(phi),sint*sin(phi 127 G4ThreeVector dir(sint*cos(phi),sint*sin(phi), cost);
127 dir.rotateUz(direction); 128 dir.rotateUz(direction);
128 129
129 // create G4DynamicParticle objects 130 // create G4DynamicParticle objects
130 G4DynamicParticle* p1 = 131 G4DynamicParticle* p1 =
131 new G4DynamicParticle(particle,dir,tkin); 132 new G4DynamicParticle(particle,dir,tkin);
132 G4DynamicParticle* p2 = 133 G4DynamicParticle* p2 =
133 new G4DynamicParticle(G4Gamma::Gamma(),-d 134 new G4DynamicParticle(G4Gamma::Gamma(),-dir,egam);
134 newp->push_back(p1); 135 newp->push_back(p1);
135 newp->push_back(p2); 136 newp->push_back(p2);
136 } 137 }
137 138
138 //....oooOO0OOooo........oooOO0OOooo........oo 139 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
139 140
140 141