Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/processes/hadronic/models/im_r_matrix/src/G4VElasticCollision.cc

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Diff markup

Differences between /processes/hadronic/models/im_r_matrix/src/G4VElasticCollision.cc (Version 11.3.0) and /processes/hadronic/models/im_r_matrix/src/G4VElasticCollision.cc (Version 7.0)


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 25 //                                                 22 //
 26 //                                                 23 //
                                                   >>  24 // $Id: G4VElasticCollision.cc,v 1.2 2004/12/07 13:48:52 gunter Exp $ //
 27                                                    25 
 28 #include "globals.hh"                              26 #include "globals.hh"
 29 #include "G4VElasticCollision.hh"                  27 #include "G4VElasticCollision.hh"
 30 #include "G4KineticTrack.hh"                       28 #include "G4KineticTrack.hh"
 31 #include "G4VCrossSectionSource.hh"                29 #include "G4VCrossSectionSource.hh"
 32 #include "G4Proton.hh"                             30 #include "G4Proton.hh"
 33 #include "G4Neutron.hh"                            31 #include "G4Neutron.hh"
 34 #include "G4XNNElastic.hh"                         32 #include "G4XNNElastic.hh"
 35 #include "G4AngularDistribution.hh"                33 #include "G4AngularDistribution.hh"
 36 #include "G4ThreeVector.hh"                        34 #include "G4ThreeVector.hh"
 37 #include "G4LorentzVector.hh"                      35 #include "G4LorentzVector.hh"
 38 #include "G4LorentzRotation.hh"                    36 #include "G4LorentzRotation.hh"
 39 #include "G4KineticTrackVector.hh"                 37 #include "G4KineticTrackVector.hh"
 40 #include "G4AngularDistributionNP.hh"   //  np     38 #include "G4AngularDistributionNP.hh"   //  np scattering
 41 #include "G4AngularDistributionPP.hh"   //  nn     39 #include "G4AngularDistributionPP.hh"   //  nn and pp scattering
 42 #include <typeinfo>                                40 #include <typeinfo>
 43                                                    41 
 44 G4VElasticCollision::G4VElasticCollision()         42 G4VElasticCollision::G4VElasticCollision()
 45 {                                                  43 { 
 46 }                                                  44 }
 47                                                    45 
 48                                                    46 
 49 G4VElasticCollision::~G4VElasticCollision()        47 G4VElasticCollision::~G4VElasticCollision()
 50 { }                                                48 { }
 51                                                    49 
 52                                                    50 
 53 G4KineticTrackVector* G4VElasticCollision::Fin     51 G4KineticTrackVector* G4VElasticCollision::FinalState(const G4KineticTrack& trk1,
 54                   const G4KineticTrack& trk2)      52                   const G4KineticTrack& trk2) const
 55 {                                                  53 {
 56   const G4VAngularDistribution* angDistributio     54   const G4VAngularDistribution* angDistribution;
 57                                                    55 
 58   angDistribution = GetAngularDistribution();      56   angDistribution = GetAngularDistribution();
 59                                                    57 
 60                                                    58 
 61   G4LorentzVector pCM=trk1.Get4Momentum() + tr     59   G4LorentzVector pCM=trk1.Get4Momentum() + trk2.Get4Momentum();
 62                                                    60 
 63   G4LorentzRotation toLabFrame(pCM.boostVector     61   G4LorentzRotation toLabFrame(pCM.boostVector());
 64   G4LorentzVector Ptmp=toLabFrame.inverse() *      62   G4LorentzVector Ptmp=toLabFrame.inverse() * trk1.Get4Momentum();  //trk1 in CMS
 65   G4LorentzRotation toZ;                           63   G4LorentzRotation toZ;
 66   toZ.rotateZ(-Ptmp.phi());                        64   toZ.rotateZ(-Ptmp.phi());
 67   toZ.rotateY(-Ptmp.theta());                      65   toZ.rotateY(-Ptmp.theta());
 68   toLabFrame *= toZ.inverse();                     66   toLabFrame *= toZ.inverse();
 69                                                    67 
 70   G4double S = pCM.mag2();                     <<  68   G4double s = pCM.mag2();
 71   G4double m10 = trk1.GetDefinition()->GetPDGM     69   G4double m10 = trk1.GetDefinition()->GetPDGMass();
 72   G4double m20 = trk2.GetDefinition()->GetPDGM     70   G4double m20 = trk2.GetDefinition()->GetPDGMass();
 73   if(S-(m10+m20)*(m10+m20) < 0) return new G4K <<  71   if(s-(m10+m20)*(m10+m20) < 0) return new G4KineticTrackVector;
 74                                                    72 
 75   G4double m_1 = trk1.GetActualMass();         <<  73   G4double m1 = trk1.GetActualMass();
 76   G4double m_2 = trk2.GetActualMass();         <<  74   G4double m2 = trk2.GetActualMass();
 77                                                    75   
 78   // Angles of outgoing particles                  76   // Angles of outgoing particles
 79   G4double cosTheta = angDistribution->CosThet <<  77   G4double cosTheta = angDistribution->CosTheta(s,m1,m2);
 80                                                    78 
 81    if ( (trk1.GetDefinition() == G4Proton::Pro     79    if ( (trk1.GetDefinition() == G4Proton::Proton() || trk1.GetDefinition() == G4Neutron::Neutron() )
 82       &&(trk2.GetDefinition() == G4Proton::Pro     80       &&(trk2.GetDefinition() == G4Proton::Proton() || trk2.GetDefinition() == G4Neutron::Neutron() ) )
 83    {                                               81    {
 84       if ( trk1.GetDefinition() == trk2.GetDef     82       if ( trk1.GetDefinition() == trk2.GetDefinition() )
 85       {                                            83       {
 86     if ( trk1.GetDefinition() == G4Proton::Pro     84     if ( trk1.GetDefinition() == G4Proton::Proton() )
 87     {                                              85     {
 88 //        G4cout << "scatterangle pp " << cosT     86 //        G4cout << "scatterangle pp " << cosTheta
 89 //               << " " << typeid(*angDistribu     87 //               << " " << typeid(*angDistribution).name() << G4endl;
 90     } else {                                       88     } else {
 91 //        G4cout << "scatterangle nn " << cosT     89 //        G4cout << "scatterangle nn " << cosTheta
 92 //               << " " << typeid(*angDistribu     90 //               << " " << typeid(*angDistribution).name() << G4endl;
 93     }                                              91     }
 94       } else {                                     92       } else {
 95 //    G4cout << "scatterangle pn " << cosTheta     93 //    G4cout << "scatterangle pn " << cosTheta
 96 //               << " " << typeid(*angDistribu     94 //               << " " << typeid(*angDistribution).name() << G4endl;
 97       }                                            95       }
 98    } else {                                        96    } else {
 99 //      G4cout << "scatterangle other " << cos     97 //      G4cout << "scatterangle other " << cosTheta
100 //               << " " << typeid(*angDistribu     98 //               << " " << typeid(*angDistribution).name() << G4endl;
101    }                                               99    }
102                                                   100 
103   G4double phi = angDistribution->Phi();          101   G4double phi = angDistribution->Phi();
104   G4double Theta = std::acos(cosTheta);           102   G4double Theta = std::acos(cosTheta);
105                                                   103 
106   // Unit vector of three-momentum                104   // Unit vector of three-momentum
107   G4ThreeVector pFinal1(std::sin(Theta)*std::c    105   G4ThreeVector pFinal1(std::sin(Theta)*std::cos(phi), std::sin(Theta)*std::sin(phi), cosTheta);
108   // Three momentum in cm system                  106   // Three momentum in cm system
109   G4double pInCM = std::sqrt((S-(m10+m20)*(m10 << 107   G4double pInCM = std::sqrt((s-(m10+m20)*(m10+m20))*(s-(m10-m20)*(m10-m20))/(4.*s));
110   pFinal1 = pFinal1 * pInCM;                      108   pFinal1 = pFinal1 * pInCM;
111   G4ThreeVector pFinal2 = -pFinal1;               109   G4ThreeVector pFinal2 = -pFinal1;
112                                                   110 
113   G4double eFinal1 = std::sqrt(pFinal1.mag2()     111   G4double eFinal1 = std::sqrt(pFinal1.mag2() + m10*m10);
114   G4double eFinal2 = std::sqrt(pFinal2.mag2()     112   G4double eFinal2 = std::sqrt(pFinal2.mag2() + m20*m20);
115                                                   113 
116   G4LorentzVector p4Final1(pFinal1, eFinal1);     114   G4LorentzVector p4Final1(pFinal1, eFinal1);
117   G4LorentzVector p4Final2(pFinal2, eFinal2);     115   G4LorentzVector p4Final2(pFinal2, eFinal2);
118                                                   116 
119   // Lorentz transformation                       117   // Lorentz transformation
120   p4Final1 *= toLabFrame;                         118   p4Final1 *= toLabFrame;
121   p4Final2 *= toLabFrame;                         119   p4Final2 *= toLabFrame;
122                                                   120 
123   // Final tracks are copies of incoming ones,    121   // Final tracks are copies of incoming ones, with modified 4-momenta
124   G4KineticTrack* final1 = new G4KineticTrack(    122   G4KineticTrack* final1 = new G4KineticTrack(trk1);
125   final1->Set4Momentum(p4Final1);                 123   final1->Set4Momentum(p4Final1);
126   G4KineticTrack* final2 = new G4KineticTrack(    124   G4KineticTrack* final2 = new G4KineticTrack(trk2);
127   final2->Set4Momentum(p4Final2);                 125   final2->Set4Momentum(p4Final2);
128                                                   126 
129   G4KineticTrackVector* finalTracks = new G4Ki    127   G4KineticTrackVector* finalTracks = new G4KineticTrackVector;
130   finalTracks->push_back(final1);                 128   finalTracks->push_back(final1);
131   finalTracks->push_back(final2);                 129   finalTracks->push_back(final2);
132                                                   130 
133   return finalTracks;                             131   return finalTracks;
134 }                                                 132 }
135                                                   133