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 // INCL++ intra-nuclear cascade model 00027 // Pekka Kaitaniemi, CEA and Helsinki Institute of Physics 00028 // Davide Mancusi, CEA 00029 // Alain Boudard, CEA 00030 // Sylvie Leray, CEA 00031 // Joseph Cugnon, University of Liege 00032 // 00033 #define INCLXX_IN_GEANT4_MODE 1 00034 00035 #include "globals.hh" 00036 00037 #include "G4INCLPauliGlobal.hh" 00038 #include "G4INCLRandom.hh" 00039 00040 namespace G4INCL { 00041 00042 PauliGlobal::PauliGlobal() {} 00043 PauliGlobal::~PauliGlobal() {} 00044 00045 G4bool PauliGlobal::isBlocked(ParticleList const pL, Nucleus const * const n) const { 00046 for(ParticleIter p=pL.begin(); p!=pL.end(); ++p) { 00047 // Pauli blocking only applies to nucleons 00048 if(!(*p)->isNucleon()) continue; 00049 00050 // If the particle is above T_F, it is never blocked 00051 const ParticleType t = (*p)->getType(); 00052 const G4double pFermi = n->getPotential()->getFermiMomentum(t); 00053 const G4double pFermiSquared = pFermi*pFermi; 00054 if((*p)->getMomentum().mag2() > pFermiSquared) continue; 00055 00056 // Count particles of the same type as p below the Fermi sea 00057 const ParticleList particles = n->getStore()->getParticles(); 00058 G4int nSea = 0; 00059 for(ParticleIter i=particles.begin(); i!=particles.end(); ++i) { 00060 if((*i)->getType() != t) continue; 00061 const G4double pmod2 = (*i)->getMomentum().mag2(); 00062 if(pmod2<pFermiSquared) nSea++; 00063 } 00064 00065 // Compute the blocking probability 00066 G4double probBlocking; 00067 if(t==Proton) 00068 probBlocking = ((G4double) nSea)/((G4double) n->getInitialZ()); 00069 else 00070 probBlocking = ((G4double) nSea)/((G4double) (n->getInitialA() - n->getInitialZ())); 00071 00072 // The avatar is blocked if any particle is blocked 00073 if(Random::shoot() < probBlocking) return true; 00074 00075 } 00076 00077 // Not blocked 00078 return false; 00079 00080 } 00081 }