00001 // 00002 // ******************************************************************** 00003 // * License and Disclaimer * 00004 // * * 00005 // * The Geant4 software is copyright of the Copyright Holders of * 00006 // * the Geant4 Collaboration. It is provided under the terms and * 00007 // * conditions of the Geant4 Software License, included in the file * 00008 // * LICENSE and available at http://cern.ch/geant4/license . These * 00009 // * include a list of copyright holders. * 00010 // * * 00011 // * Neither the authors of this software system, nor their employing * 00012 // * institutes,nor the agencies providing financial support for this * 00013 // * work make any representation or warranty, express or implied, * 00014 // * regarding this software system or assume any liability for its * 00015 // * use. Please see the license in the file LICENSE and URL above * 00016 // * for the full disclaimer and the limitation of liability. * 00017 // * * 00018 // * This code implementation is the result of the scientific and * 00019 // * technical work of the GEANT4 collaboration. * 00020 // * By using, copying, modifying or distributing the software (or * 00021 // * any work based on the software) you agree to acknowledge its * 00022 // * use in resulting scientific publications, and indicate your * 00023 // * acceptance of all terms of the Geant4 Software license. * 00024 // ******************************************************************** 00025 // 00026 00027 #include "globals.hh" 00028 #include "G4VAnnihilationCollision.hh" 00029 #include "G4KineticTrack.hh" 00030 #include "G4VCrossSectionSource.hh" 00031 #include "G4Proton.hh" 00032 #include "G4Neutron.hh" 00033 #include "G4XNNElastic.hh" 00034 #include "G4AngularDistribution.hh" 00035 #include "G4ThreeVector.hh" 00036 #include "G4LorentzVector.hh" 00037 #include "G4LorentzRotation.hh" 00038 #include "G4KineticTrackVector.hh" 00039 #include "Randomize.hh" 00040 #include "G4PionPlus.hh" 00041 00042 00043 G4VAnnihilationCollision::G4VAnnihilationCollision() 00044 { 00045 theAngularDistribution=0; 00046 } 00047 00048 00049 G4VAnnihilationCollision::~G4VAnnihilationCollision() 00050 { 00051 if (theAngularDistribution) { 00052 delete theAngularDistribution; 00053 theAngularDistribution=0; 00054 } 00055 } 00056 00057 00058 G4KineticTrackVector* G4VAnnihilationCollision::FinalState(const G4KineticTrack& trk1, 00059 const G4KineticTrack& trk2) const 00060 { 00061 G4LorentzVector p = trk1.Get4Momentum() + trk2.Get4Momentum(); 00062 G4double sqrtS = p.m(); 00063 // G4double s = sqrtS * sqrtS; 00064 00065 // G4double m1 = trk1.GetActualMass(); 00066 // G4double m2 = trk2.GetActualMass(); 00067 00068 G4ParticleDefinition* OutputDefinition = const_cast<G4ParticleDefinition *>( GetOutgoingParticle(trk1,trk2) ); 00069 00070 // Unit vector of three-momentum 00071 00072 G4ThreeVector pFinal(0.0, 0.0, 0.0); 00073 G4double eFinal = sqrtS; 00074 00075 G4LorentzVector p4Final(pFinal, eFinal); 00076 00077 // Lorentz transformation 00078 G4LorentzRotation toLabFrame(p.boostVector()); 00079 p4Final *= toLabFrame; 00080 00081 G4KineticTrack* final = new G4KineticTrack(OutputDefinition, 0.0, 00082 trk1.GetPosition(), p4Final); 00083 00084 G4KineticTrackVector* finalTracks = new G4KineticTrackVector; 00085 00086 finalTracks->push_back(final); 00087 00088 return finalTracks; 00089 } 00090