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G4INCLTransmissionChannel.cc
Go to the documentation of this file. Or view the newest version in sPHENIX GitHub for file G4INCLTransmissionChannel.cc
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25 //
26 // INCL++ intra-nuclear cascade model
27 // Alain Boudard, CEA-Saclay, France
28 // Joseph Cugnon, University of Liege, Belgium
29 // Jean-Christophe David, CEA-Saclay, France
30 // Pekka Kaitaniemi, CEA-Saclay, France, and Helsinki Institute of Physics, Finland
31 // Sylvie Leray, CEA-Saclay, France
32 // Davide Mancusi, CEA-Saclay, France
33 //
34 #define INCLXX_IN_GEANT4_MODE 1
35 
36 #include "globals.hh"
37 
39 
40 namespace G4INCL {
41 
43  : theNucleus(nucleus), theParticle(particle),
44  refraction(false),
45  pOutMag(0.),
46  kineticEnergyOutside(initializeKineticEnergyOutside()),
47  cosRefractionAngle(1.)
48  {}
49 
51  : theNucleus(nucleus), theParticle(particle),
52  refraction(false),
53  pOutMag(0.),
54  kineticEnergyOutside(TOut),
55  cosRefractionAngle(1.)
56  {}
57 
58  TransmissionChannel::TransmissionChannel(Nucleus * const nucleus, Particle * const particle, const G4double kOut, const G4double cosR)
59  : theNucleus(nucleus), theParticle(particle),
60  refraction(true),
61  pOutMag(kOut),
62  kineticEnergyOutside(initializeKineticEnergyOutside()),
63  cosRefractionAngle(cosR)
64  {}
65 
67 
69  // The particle energy outside the nucleus. Subtract the nuclear
70  // potential from the kinetic energy when leaving the nucleus
73  - theParticle->getMass();
74 
75  // Correction for real masses
76  const G4int AParent = theNucleus->getA();
77  const G4int ZParent = theNucleus->getZ();
78  const G4int SParent = theNucleus->getS();
79  const G4double theQValueCorrection = theParticle->getEmissionQValueCorrection(AParent,ZParent,SParent);
80  TOut += theQValueCorrection;
81  return TOut;
82  }
83 
85 
86  // Use the table mass in the outside world
89 
90  if(refraction) {
91  // Change the momentum direction
92  // The magnitude of the particle momentum outside the nucleus will be
93  // fixed by the kineticEnergyOutside variable. This is done in order to
94  // avoid numerical inaccuracies.
96  const G4double r2 = position.mag2();
98  if(r2>0.)
99  normal = position / std::sqrt(r2);
100 
102 
103  const ThreeVector pOut = normal * (pOutMag * cosRefractionAngle) + momentum - normal * normal.dot(momentum);
104 // assert(std::fabs(pOut.mag()-pOutMag)<1.e-5);
105 
106  theParticle->setMomentum(pOut);
107  }
108  // Scaling factor for the particle momentum
111  }
112 
114  G4double initialEnergy = 0.0;
115  initialEnergy = theParticle->getEnergy() - theParticle->getPotentialEnergy();
116  // Correction for real masses
117  const G4int AParent = theNucleus->getA();
118  const G4int ZParent = theNucleus->getZ();
119  const G4int SParent = theNucleus->getS();
120  initialEnergy += theParticle->getTableMass() - theParticle->getMass()
121  + theParticle->getEmissionQValueCorrection(AParent,ZParent,SParent);
122  particleLeaves();
123  fs->setTotalEnergyBeforeInteraction(initialEnergy);
124  fs->addOutgoingParticle(theParticle); // We write the particle down as outgoing
125  }
126 }