| Geant4 Cross Reference |
1 // 1
2 // *******************************************
3 // * License and Disclaimer
4 // *
5 // * The Geant4 software is copyright of th
6 // * the Geant4 Collaboration. It is provided
7 // * conditions of the Geant4 Software License
8 // * LICENSE and available at http://cern.ch/
9 // * include a list of copyright holders.
10 // *
11 // * Neither the authors of this software syst
12 // * institutes,nor the agencies providing fin
13 // * work make any representation or warran
14 // * regarding this software system or assum
15 // * use. Please see the license in the file
16 // * for the full disclaimer and the limitatio
17 // *
18 // * This code implementation is the result
19 // * technical work of the GEANT4 collaboratio
20 // * By using, copying, modifying or distri
21 // * any work based on the software) you ag
22 // * use in resulting scientific publicati
23 // * acceptance of all terms of the Geant4 Sof
24 // *******************************************
25 //
26 //
27
28 #include "globals.hh"
29 #include "G4VElasticCollision.hh"
30 #include "G4KineticTrack.hh"
31 #include "G4VCrossSectionSource.hh"
32 #include "G4Proton.hh"
33 #include "G4Neutron.hh"
34 #include "G4XNNElastic.hh"
35 #include "G4AngularDistribution.hh"
36 #include "G4ThreeVector.hh"
37 #include "G4LorentzVector.hh"
38 #include "G4LorentzRotation.hh"
39 #include "G4KineticTrackVector.hh"
40 #include "G4AngularDistributionNP.hh" // np
41 #include "G4AngularDistributionPP.hh" // nn
42 #include <typeinfo>
43
44 G4VElasticCollision::G4VElasticCollision()
45 {
46 }
47
48
49 G4VElasticCollision::~G4VElasticCollision()
50 { }
51
52
53 G4KineticTrackVector* G4VElasticCollision::Fin
54 const G4KineticTrack& trk2)
55 {
56 const G4VAngularDistribution* angDistributio
57
58 angDistribution = GetAngularDistribution();
59
60
61 G4LorentzVector pCM=trk1.Get4Momentum() + tr
62
63 G4LorentzRotation toLabFrame(pCM.boostVector
64 G4LorentzVector Ptmp=toLabFrame.inverse() *
65 G4LorentzRotation toZ;
66 toZ.rotateZ(-Ptmp.phi());
67 toZ.rotateY(-Ptmp.theta());
68 toLabFrame *= toZ.inverse();
69
70 G4double S = pCM.mag2();
71 G4double m10 = trk1.GetDefinition()->GetPDGM
72 G4double m20 = trk2.GetDefinition()->GetPDGM
73 if(S-(m10+m20)*(m10+m20) < 0) return new G4K
74
75 G4double m_1 = trk1.GetActualMass();
76 G4double m_2 = trk2.GetActualMass();
77
78 // Angles of outgoing particles
79 G4double cosTheta = angDistribution->CosThet
80
81 if ( (trk1.GetDefinition() == G4Proton::Pro
82 &&(trk2.GetDefinition() == G4Proton::Pro
83 {
84 if ( trk1.GetDefinition() == trk2.GetDef
85 {
86 if ( trk1.GetDefinition() == G4Proton::Pro
87 {
88 // G4cout << "scatterangle pp " << cosT
89 // << " " << typeid(*angDistribu
90 } else {
91 // G4cout << "scatterangle nn " << cosT
92 // << " " << typeid(*angDistribu
93 }
94 } else {
95 // G4cout << "scatterangle pn " << cosTheta
96 // << " " << typeid(*angDistribu
97 }
98 } else {
99 // G4cout << "scatterangle other " << cos
100 // << " " << typeid(*angDistribu
101 }
102
103 G4double phi = angDistribution->Phi();
104 G4double Theta = std::acos(cosTheta);
105
106 // Unit vector of three-momentum
107 G4ThreeVector pFinal1(std::sin(Theta)*std::c
108 // Three momentum in cm system
109 G4double pInCM = std::sqrt((S-(m10+m20)*(m10
110 pFinal1 = pFinal1 * pInCM;
111 G4ThreeVector pFinal2 = -pFinal1;
112
113 G4double eFinal1 = std::sqrt(pFinal1.mag2()
114 G4double eFinal2 = std::sqrt(pFinal2.mag2()
115
116 G4LorentzVector p4Final1(pFinal1, eFinal1);
117 G4LorentzVector p4Final2(pFinal2, eFinal2);
118
119 // Lorentz transformation
120 p4Final1 *= toLabFrame;
121 p4Final2 *= toLabFrame;
122
123 // Final tracks are copies of incoming ones,
124 G4KineticTrack* final1 = new G4KineticTrack(
125 final1->Set4Momentum(p4Final1);
126 G4KineticTrack* final2 = new G4KineticTrack(
127 final2->Set4Momentum(p4Final2);
128
129 G4KineticTrackVector* finalTracks = new G4Ki
130 finalTracks->push_back(final1);
131 finalTracks->push_back(final2);
132
133 return finalTracks;
134 }
135