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25 // 25 //
26 // INCL++ intra-nuclear cascade model 26 // INCL++ intra-nuclear cascade model
27 // Alain Boudard, CEA-Saclay, France << 27 // Pekka Kaitaniemi, CEA and Helsinki Institute of Physics
28 // Joseph Cugnon, University of Liege, Belgium << 28 // Davide Mancusi, CEA
29 // Jean-Christophe David, CEA-Saclay, France << 29 // Alain Boudard, CEA
30 // Pekka Kaitaniemi, CEA-Saclay, France, and H << 30 // Sylvie Leray, CEA
31 // Sylvie Leray, CEA-Saclay, France << 31 // Joseph Cugnon, University of Liege
32 // Davide Mancusi, CEA-Saclay, France << 32 //
>> 33 // INCL++ revision: v5.1.8
33 // 34 //
34 #define INCLXX_IN_GEANT4_MODE 1 35 #define INCLXX_IN_GEANT4_MODE 1
35 36
36 #include "globals.hh" 37 #include "globals.hh"
37 38
38 /** \file G4INCLRecombinationChannel.cc 39 /** \file G4INCLRecombinationChannel.cc
39 * \brief Delta-nucleon recombination channel. 40 * \brief Delta-nucleon recombination channel.
40 * 41 *
41 * \date 25 March 2011 42 * \date 25 March 2011
42 * \author Davide Mancusi 43 * \author Davide Mancusi
43 */ 44 */
44 45
45 #include "G4INCLRecombinationChannel.hh" 46 #include "G4INCLRecombinationChannel.hh"
46 #include "G4INCLRandom.hh" 47 #include "G4INCLRandom.hh"
47 #include "G4INCLKinematicsUtils.hh" 48 #include "G4INCLKinematicsUtils.hh"
48 #include "G4INCLParticleTable.hh" 49 #include "G4INCLParticleTable.hh"
49 #include "G4INCLBinaryCollisionAvatar.hh" 50 #include "G4INCLBinaryCollisionAvatar.hh"
50 #include "G4INCLGlobals.hh" 51 #include "G4INCLGlobals.hh"
51 52
52 // #include <cassert> 53 // #include <cassert>
53 54
54 namespace G4INCL { 55 namespace G4INCL {
55 56
56 RecombinationChannel::RecombinationChannel(P << 57 RecombinationChannel::RecombinationChannel(Nucleus *n, Particle *p1, Particle *p2)
>> 58 :theNucleus(n)
57 { 59 {
58 if(p1->isDelta()) { 60 if(p1->isDelta()) {
59 // assert(p2->isNucleon()); 61 // assert(p2->isNucleon());
60 theDelta = p1; 62 theDelta = p1;
61 theNucleon = p2; 63 theNucleon = p2;
62 } else { 64 } else {
63 // assert(p1->isNucleon()); 65 // assert(p1->isNucleon());
64 theDelta = p2; 66 theDelta = p2;
65 theNucleon = p1; 67 theNucleon = p1;
66 } 68 }
67 } 69 }
68 70
69 RecombinationChannel::~RecombinationChannel( 71 RecombinationChannel::~RecombinationChannel()
70 { 72 {
71 } 73 }
72 74
73 void RecombinationChannel::fillFinalState(Fi << 75 FinalState* RecombinationChannel::getFinalState()
74 { 76 {
75 // Compute the total available energy in t 77 // Compute the total available energy in the CM
76 const G4double sqrts = KinematicsUtils::to 78 const G4double sqrts = KinematicsUtils::totalEnergyInCM(theDelta, theNucleon);
77 79
78 // Assign the types of the final-state par 80 // Assign the types of the final-state particles
79 switch(theDelta->getType()) { 81 switch(theDelta->getType()) {
80 case DeltaPlusPlus: 82 case DeltaPlusPlus:
81 // assert(theNucleon->getType()!=Proton); 83 // assert(theNucleon->getType()!=Proton);
82 theDelta->setType(Proton); 84 theDelta->setType(Proton);
83 theNucleon->setType(Proton); 85 theNucleon->setType(Proton);
84 break; 86 break;
85 case DeltaPlus: 87 case DeltaPlus:
86 theDelta->setType(Proton); 88 theDelta->setType(Proton);
87 break; 89 break;
88 case DeltaZero: 90 case DeltaZero:
89 theDelta->setType(Neutron); 91 theDelta->setType(Neutron);
90 break; 92 break;
91 case DeltaMinus: 93 case DeltaMinus:
92 // assert(theNucleon->getType()!=Neutron); 94 // assert(theNucleon->getType()!=Neutron);
93 theDelta->setType(Neutron); 95 theDelta->setType(Neutron);
94 theNucleon->setType(Neutron); 96 theNucleon->setType(Neutron);
95 break; 97 break;
96 default: 98 default:
97 INCL_ERROR("Unknown particle type in R << 99 ERROR("Unknown particle type in RecombinationChannel" << std::endl);
98 break; 100 break;
99 } 101 }
100 102
101 // Calculate the momenta of the nucleons i 103 // Calculate the momenta of the nucleons in the final state
102 const G4double pCM = KinematicsUtils::mome 104 const G4double pCM = KinematicsUtils::momentumInCM(sqrts, theDelta->getMass(), theNucleon->getMass());
103 105
104 // The angular distribution of final-state 106 // The angular distribution of final-state nucleons is isotropic
105 ThreeVector momentum = Random::normVector( 107 ThreeVector momentum = Random::normVector(pCM);
106 108
107 // Assign the momenta 109 // Assign the momenta
108 theDelta->setMomentum(momentum); 110 theDelta->setMomentum(momentum);
109 theNucleon->setMomentum(-momentum); 111 theNucleon->setMomentum(-momentum);
110 112
111 // Update the kinetic energies 113 // Update the kinetic energies
112 theDelta->adjustEnergyFromMomentum(); 114 theDelta->adjustEnergyFromMomentum();
113 theNucleon->adjustEnergyFromMomentum(); 115 theNucleon->adjustEnergyFromMomentum();
114 116
115 // Create the final state 117 // Create the final state
>> 118 FinalState *fs = new FinalState();
116 fs->addModifiedParticle(theDelta); 119 fs->addModifiedParticle(theDelta);
117 fs->addModifiedParticle(theNucleon); 120 fs->addModifiedParticle(theNucleon);
>> 121
>> 122 return fs;
118 123
119 } 124 }
120 125
121 } 126 }
122 127