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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 <<
33 // 32 //
34 #define INCLXX_IN_GEANT4_MODE 1 33 #define INCLXX_IN_GEANT4_MODE 1
35 34
36 #include "globals.hh" 35 #include "globals.hh"
37 36
38 /** \file G4INCLParticleSampler.cc 37 /** \file G4INCLParticleSampler.cc
39 * \brief Class for sampling particles in a nu 38 * \brief Class for sampling particles in a nucleus
40 * 39 *
41 * \date 18 July 2012 40 * \date 18 July 2012
42 * \author Davide Mancusi 41 * \author Davide Mancusi
43 */ 42 */
44 43
45 #include "G4INCLParticleSampler.hh" 44 #include "G4INCLParticleSampler.hh"
46 #include "G4INCLParticleTable.hh" 45 #include "G4INCLParticleTable.hh"
47 #include "G4INCLNuclearDensityFactory.hh" 46 #include "G4INCLNuclearDensityFactory.hh"
48 47
49 namespace G4INCL { 48 namespace G4INCL {
50 49
51 ParticleSampler::ParticleSampler(const G4int << 50 ParticleSampler::ParticleSampler(const G4int A, const G4int Z) :
52 sampleOneProton(&ParticleSampler::sampleOn 51 sampleOneProton(&ParticleSampler::sampleOneParticleWithoutRPCorrelation),
53 sampleOneNeutron(&ParticleSampler::sampleO 52 sampleOneNeutron(&ParticleSampler::sampleOneParticleWithoutRPCorrelation),
54 theA(A), 53 theA(A),
55 theZ(Z), 54 theZ(Z),
56 theS(S), <<
57 theDensity(NULL), 55 theDensity(NULL),
58 thePotential(NULL) 56 thePotential(NULL)
59 { 57 {
60 std::fill(theRCDFTable, theRCDFTable + Unk << 58 std::fill(theRCDFTable, theRCDFTable + UnknownParticle, static_cast<InverseInterpolationTable *>(NULL));
61 std::fill(thePCDFTable, thePCDFTable + Unk << 59 std::fill(thePCDFTable, thePCDFTable + UnknownParticle, static_cast<InverseInterpolationTable *>(NULL));
62 std::fill(rpCorrelationCoefficient, rpCorr 60 std::fill(rpCorrelationCoefficient, rpCorrelationCoefficient + UnknownParticle, 1.);
63 rpCorrelationCoefficient[Proton] = Particl 61 rpCorrelationCoefficient[Proton] = ParticleTable::getRPCorrelationCoefficient(Proton);
64 rpCorrelationCoefficient[Neutron] = Partic 62 rpCorrelationCoefficient[Neutron] = ParticleTable::getRPCorrelationCoefficient(Neutron);
65 rpCorrelationCoefficient[Lambda] = Particl <<
66 } 63 }
67 64
68 ParticleSampler::~ParticleSampler() { 65 ParticleSampler::~ParticleSampler() {
69 } 66 }
70 67
71 void ParticleSampler::setDensity(NuclearDens 68 void ParticleSampler::setDensity(NuclearDensity const * const d) {
72 theDensity = d; 69 theDensity = d;
73 updateSampleOneParticleMethods(); 70 updateSampleOneParticleMethods();
74 } 71 }
75 72
76 void ParticleSampler::setPotential(NuclearPo 73 void ParticleSampler::setPotential(NuclearPotential::INuclearPotential const * const p) {
77 thePotential = p; 74 thePotential = p;
78 updateSampleOneParticleMethods(); 75 updateSampleOneParticleMethods();
79 } 76 }
80 77
81 void ParticleSampler::updateSampleOneParticl 78 void ParticleSampler::updateSampleOneParticleMethods() {
82 if(theDensity && thePotential) { 79 if(theDensity && thePotential) {
83 if(rpCorrelationCoefficient[Proton]>0.99 80 if(rpCorrelationCoefficient[Proton]>0.99999) {
84 sampleOneProton = &ParticleSampler::sa 81 sampleOneProton = &ParticleSampler::sampleOneParticleWithRPCorrelation;
85 } else { 82 } else {
86 sampleOneProton = &ParticleSampler::sa 83 sampleOneProton = &ParticleSampler::sampleOneParticleWithFuzzyRPCorrelation;
87 } 84 }
88 if(rpCorrelationCoefficient[Neutron]>0.9 85 if(rpCorrelationCoefficient[Neutron]>0.99999) {
89 sampleOneNeutron = &ParticleSampler::s 86 sampleOneNeutron = &ParticleSampler::sampleOneParticleWithRPCorrelation;
90 } else { 87 } else {
91 sampleOneNeutron = &ParticleSampler::s 88 sampleOneNeutron = &ParticleSampler::sampleOneParticleWithFuzzyRPCorrelation;
92 } 89 }
93 } else { 90 } else {
94 sampleOneProton = &ParticleSampler::samp 91 sampleOneProton = &ParticleSampler::sampleOneParticleWithoutRPCorrelation;
95 sampleOneNeutron = &ParticleSampler::sam 92 sampleOneNeutron = &ParticleSampler::sampleOneParticleWithoutRPCorrelation;
96 } 93 }
97 } 94 }
98 95
99 ParticleList ParticleSampler::sampleParticle 96 ParticleList ParticleSampler::sampleParticles(const ThreeVector &position) {
100 ParticleList aList; <<
101 sampleParticlesIntoList(position, aList); <<
102 return aList; <<
103 } <<
104 <<
105 void ParticleSampler::sampleParticlesIntoLis <<
106 97
107 if(sampleOneProton == &ParticleSampler::sa 98 if(sampleOneProton == &ParticleSampler::sampleOneParticleWithoutRPCorrelation) {
108 // sampling without correlation, we need 99 // sampling without correlation, we need to initialize the CDF tables
109 theRCDFTable[Proton] = NuclearDensityFac 100 theRCDFTable[Proton] = NuclearDensityFactory::createRCDFTable(Proton, theA, theZ);
110 thePCDFTable[Proton] = NuclearDensityFac 101 thePCDFTable[Proton] = NuclearDensityFactory::createPCDFTable(Proton, theA, theZ);
111 theRCDFTable[Neutron] = NuclearDensityFa 102 theRCDFTable[Neutron] = NuclearDensityFactory::createRCDFTable(Neutron, theA, theZ);
112 thePCDFTable[Neutron] = NuclearDensityFa 103 thePCDFTable[Neutron] = NuclearDensityFactory::createPCDFTable(Neutron, theA, theZ);
113 theRCDFTable[Lambda] = NuclearDensityFac <<
114 thePCDFTable[Lambda] = NuclearDensityFac <<
115 } 104 }
116 105
117 theList.resize(theA); << 106 ParticleList theList;
118 if(theA > 2) { 107 if(theA > 2) {
119 ParticleType type = Proton; 108 ParticleType type = Proton;
120 ParticleSamplerMethod sampleOneParticle 109 ParticleSamplerMethod sampleOneParticle = sampleOneProton;
121 for(G4int i = 0; i < theA; ++i) { << 110 for(G4int i = 1; i <= theA; ++i) {
122 if(i == theZ) { // Nucleons [Z..A-1] a << 111 if(i == (theZ + 1)) { // Nucleons [Z+1..A] are neutrons
123 type = Lambda; << 112 type = Neutron;
124 sampleOneParticle = sampleOneNeutron << 113 sampleOneParticle = sampleOneNeutron;
125 } 114 }
126 if(i == theZ - theS) type = Neutron; <<
127 Particle *p = (this->*sampleOneParticl 115 Particle *p = (this->*sampleOneParticle)(type);
128 p->setPosition(position + p->getPositi 116 p->setPosition(position + p->getPosition());
129 theList[i] = p; << 117 theList.push_back(p);
130 } 118 }
131 } else { 119 } else {
132 // For deuterons, only sample the proton 120 // For deuterons, only sample the proton position and momentum. The
133 // neutron position and momenta are dete 121 // neutron position and momenta are determined by the conditions of
134 // vanishing CM position and total momen 122 // vanishing CM position and total momentum.
135 // assert(theZ==1); 123 // assert(theZ==1);
136 Particle *aProton = (this->*(this->sampl 124 Particle *aProton = (this->*(this->sampleOneProton))(Proton);
137 Particle *aNeutron = new Particle(Neutro 125 Particle *aNeutron = new Particle(Neutron, -aProton->getMomentum(), position - aProton->getPosition());
138 aProton->setPosition(position + aProton- 126 aProton->setPosition(position + aProton->getPosition());
139 theList[0] = aProton; << 127 theList.push_back(aProton);
140 theList[1] = aNeutron; << 128 theList.push_back(aNeutron);
141 } 129 }
>> 130
>> 131 return theList;
142 } 132 }
143 133
144 Particle *ParticleSampler::sampleOneParticle 134 Particle *ParticleSampler::sampleOneParticleWithRPCorrelation(const ParticleType t) const {
145 // assert(theDensity && thePotential); 135 // assert(theDensity && thePotential);
146 const G4double theFermiMomentum = thePoten 136 const G4double theFermiMomentum = thePotential->getFermiMomentum(t);
147 const ThreeVector momentumVector = Random: 137 const ThreeVector momentumVector = Random::sphereVector(theFermiMomentum);
148 const G4double momentumAbs = momentumVecto 138 const G4double momentumAbs = momentumVector.mag();
149 const G4double momentumRatio = momentumAbs 139 const G4double momentumRatio = momentumAbs/theFermiMomentum;
150 const G4double reflectionRadius = theDensi 140 const G4double reflectionRadius = theDensity->getMaxRFromP(t, momentumRatio);
151 const ThreeVector positionVector = Random: 141 const ThreeVector positionVector = Random::sphereVector(reflectionRadius);
152 Particle *aParticle = new Particle(t, mome 142 Particle *aParticle = new Particle(t, momentumVector, positionVector);
153 aParticle->setUncorrelatedMomentum(momentu 143 aParticle->setUncorrelatedMomentum(momentumAbs);
154 return aParticle; 144 return aParticle;
155 } 145 }
156 146
157 Particle *ParticleSampler::sampleOneParticle 147 Particle *ParticleSampler::sampleOneParticleWithoutRPCorrelation(const ParticleType t) const {
158 const G4double position = (*(theRCDFTable[ 148 const G4double position = (*(theRCDFTable[t]))(Random::shoot());
159 const G4double momentum = (*(thePCDFTable[ 149 const G4double momentum = (*(thePCDFTable[t]))(Random::shoot());
160 ThreeVector positionVector = Random::normV 150 ThreeVector positionVector = Random::normVector(position);
161 ThreeVector momentumVector = Random::normV 151 ThreeVector momentumVector = Random::normVector(momentum);
162 return new Particle(t, momentumVector, pos 152 return new Particle(t, momentumVector, positionVector);
163 } 153 }
164 154
165 Particle *ParticleSampler::sampleOneParticle 155 Particle *ParticleSampler::sampleOneParticleWithFuzzyRPCorrelation(const ParticleType t) const {
166 // assert(theDensity && thePotential); 156 // assert(theDensity && thePotential);
167 std::pair<G4double,G4double> ranNumbers = 157 std::pair<G4double,G4double> ranNumbers = Random::correlatedUniform(rpCorrelationCoefficient[t]);
168 const G4double x = Math::pow13(ranNumbers. 158 const G4double x = Math::pow13(ranNumbers.first);
169 const G4double y = Math::pow13(ranNumbers. 159 const G4double y = Math::pow13(ranNumbers.second);
170 const G4double theFermiMomentum = thePoten 160 const G4double theFermiMomentum = thePotential->getFermiMomentum(t);
171 const ThreeVector momentumVector = Random: 161 const ThreeVector momentumVector = Random::normVector(y*theFermiMomentum);
172 const G4double reflectionRadius = theDensi 162 const G4double reflectionRadius = theDensity->getMaxRFromP(t, x);
173 const ThreeVector positionVector = Random: 163 const ThreeVector positionVector = Random::sphereVector(reflectionRadius);
174 Particle *aParticle = new Particle(t, mome 164 Particle *aParticle = new Particle(t, momentumVector, positionVector);
175 aParticle->setUncorrelatedMomentum(x*theFe 165 aParticle->setUncorrelatedMomentum(x*theFermiMomentum);
176 return aParticle; 166 return aParticle;
177 } 167 }
178 168
179 } 169 }
180 170
181 171