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