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 // $Id$ 00027 // 00028 00029 // G4 Process: Gheisha High Energy Collision model. 00030 // This includes the high energy cascading model, the two-body-resonance model 00031 // and the low energy two-body model. Not included is the low energy stuff 00032 // like nuclear reactions, nuclear fission without any cascading and all 00033 // processes for particles at rest. 00034 // First work done by J.L.Chuma and F.W.Jones, TRIUMF, June 96. 00035 // H. Fesefeldt, RWTH-Aachen, 23-October-1996 00036 00037 #include "G4HEAntiSigmaZeroInelastic.hh" 00038 #include "G4Gamma.hh" 00039 #include "globals.hh" 00040 #include "G4ios.hh" 00041 00042 void G4HEAntiSigmaZeroInelastic::ModelDescription(std::ostream& outFile) const 00043 { 00044 outFile << "G4HEAntiSigmaZeroInelastic is one of the High Energy\n" 00045 << "Parameterized (HEP) models used to implement inelastic\n" 00046 << "anti-Sigma0 scattering from nuclei. It is a re-engineered\n" 00047 << "version of the GHEISHA code of H. Fesefeldt. It divides the\n" 00048 << "initial collision products into backward- and forward-going\n" 00049 << "clusters which are then decayed into final state hadrons.\n" 00050 << "The model does not conserve energy on an event-by-event\n" 00051 << "basis. It may be applied to anti-Sigma0 with initial\n" 00052 << "energies above 20 GeV.\n"; 00053 } 00054 00055 00056 G4HadFinalState* 00057 G4HEAntiSigmaZeroInelastic::ApplyYourself(const G4HadProjectile& aTrack, 00058 G4Nucleus& targetNucleus) 00059 { 00060 G4HEVector* pv = new G4HEVector[MAXPART]; 00061 const G4HadProjectile *aParticle = &aTrack; 00062 G4HEVector incidentParticle(aParticle); 00063 G4HEAntiLambdaInelastic theAntiLambdaInelastic; 00064 theAntiLambdaInelastic.SetMaxNumberOfSecondaries(MAXPART); 00065 theAntiLambdaInelastic.SetVerboseLevel(verboseLevel); 00066 00067 G4double incidentTotalMomentum = incidentParticle.getTotalMomentum(); 00068 G4double pgam = G4UniformRand()*incidentTotalMomentum*0.75; 00069 G4HEVector incidentAntiLambda; 00070 incidentAntiLambda.SmulAndUpdate(incidentParticle, 00071 (incidentTotalMomentum - pgam)/incidentTotalMomentum); 00072 G4DynamicParticle* aLambda = new G4DynamicParticle(); 00073 aLambda->SetDefinition(G4AntiLambda::AntiLambda()); 00074 aLambda->SetMomentum(incidentAntiLambda.getMomentum()); 00075 G4HadProjectile aLambdaTrack(*aLambda); 00076 G4HadFinalState* result = theAntiLambdaInelastic.ApplyYourself(aLambdaTrack, targetNucleus); 00077 vecLength = theAntiLambdaInelastic.GetNumberOfSecondaries(); 00078 pv[vecLength] = Gamma; 00079 pv[vecLength].setMomentum(incidentParticle.getMomentum()); 00080 pv[vecLength].SmulAndUpdate( pv[vecLength],pgam/incidentTotalMomentum); 00081 G4DynamicParticle * aPhoton = new G4DynamicParticle(); 00082 aPhoton->SetDefinition(G4Gamma::Gamma()); 00083 aPhoton->SetMomentum(pv[vecLength].getMomentum()); 00084 result->AddSecondary(aPhoton); 00085 delete [] pv; 00086 return result; 00087 } 00088