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26 // 26 //
>> 27 // $Id$
27 // 28 //
28 29
29 // Author : Gunter Folger March 2007 30 // Author : Gunter Folger March 2007
30 // Modified by Mikhail Kossov. Apr2009, E/M co 31 // Modified by Mikhail Kossov. Apr2009, E/M conservation: ResidualNucleus is added (ResNuc)
31 // Class Description 32 // Class Description
32 // Final state production model for theoretica 33 // Final state production model for theoretical models of hadron inelastic
33 // quasi elastic scattering in geant4; 34 // quasi elastic scattering in geant4;
34 // Class Description - End 35 // Class Description - End
35 // 36 //
36 // Modified: 37 // Modified:
37 // 20110805 M. Kelsey -- Follow change to G4V 38 // 20110805 M. Kelsey -- Follow change to G4V3DNucleus::GetNucleons()
38 // 20110808 M. Kelsey -- Move #includes from 39 // 20110808 M. Kelsey -- Move #includes from .hh, add many missing
39 40
40 #include "G4QuasiElasticChannel.hh" 41 #include "G4QuasiElasticChannel.hh"
41 42
42 #include "G4Fancy3DNucleus.hh" 43 #include "G4Fancy3DNucleus.hh"
43 #include "G4DynamicParticle.hh" 44 #include "G4DynamicParticle.hh"
44 #include "G4HadTmpUtil.hh" /* lrint */ 45 #include "G4HadTmpUtil.hh" /* lrint */
45 #include "G4KineticTrack.hh" 46 #include "G4KineticTrack.hh"
46 #include "G4KineticTrackVector.hh" 47 #include "G4KineticTrackVector.hh"
47 #include "G4LorentzVector.hh" 48 #include "G4LorentzVector.hh"
48 #include "G4Neutron.hh" 49 #include "G4Neutron.hh"
49 #include "G4Nucleon.hh" 50 #include "G4Nucleon.hh"
50 #include "G4Nucleus.hh" 51 #include "G4Nucleus.hh"
51 #include "G4ParticleDefinition.hh" 52 #include "G4ParticleDefinition.hh"
52 #include "G4ParticleTable.hh" 53 #include "G4ParticleTable.hh"
53 #include "G4IonTable.hh" <<
54 #include "G4QuasiElRatios.hh" 54 #include "G4QuasiElRatios.hh"
55 #include "globals.hh" 55 #include "globals.hh"
56 #include <vector> 56 #include <vector>
57 #include "G4PhysicsModelCatalog.hh" <<
58 57
59 //#define debug_scatter 58 //#define debug_scatter
60 59
61 60
62 G4QuasiElasticChannel::G4QuasiElasticChannel() 61 G4QuasiElasticChannel::G4QuasiElasticChannel()
63 : G4HadronicInteraction("QuasiElastic"), << 62 : theQuasiElastic(G4QuasiElRatios::GetPointer()),
64 theQuasiElastic(new G4QuasiElRatios), << 63 the3DNucleus(new G4Fancy3DNucleus) {}
65 the3DNucleus(new G4Fancy3DNucleus), <<
66 secID(-1) { <<
67 secID = G4PhysicsModelCatalog::GetModelID( " <<
68 } <<
69 64
70 G4QuasiElasticChannel::~G4QuasiElasticChannel( 65 G4QuasiElasticChannel::~G4QuasiElasticChannel()
71 { 66 {
72 delete the3DNucleus; 67 delete the3DNucleus;
73 delete theQuasiElastic; <<
74 } 68 }
75 69
76 G4double G4QuasiElasticChannel::GetFraction(G4 70 G4double G4QuasiElasticChannel::GetFraction(G4Nucleus &theNucleus,
77 const G4DynamicParticle & thePrimary) 71 const G4DynamicParticle & thePrimary)
78 { 72 {
79 #ifdef debug_scatter 73 #ifdef debug_scatter
80 G4cout << "G4QuasiElasticChannel:: P=" < 74 G4cout << "G4QuasiElasticChannel:: P=" << thePrimary.GetTotalMomentum()
81 << ", pPDG=" << thePrimary.GetDef 75 << ", pPDG=" << thePrimary.GetDefinition()->GetPDGEncoding()
82 << ", Z = " << theNucleus.GetZ_a 76 << ", Z = " << theNucleus.GetZ_asInt())
83 << ", N = " << theNucleus.GetN_a 77 << ", N = " << theNucleus.GetN_asInt())
84 << ", A = " << theNucleus.GetA_a 78 << ", A = " << theNucleus.GetA_asInt() << G4endl;
85 #endif 79 #endif
86 80
87 std::pair<G4double,G4double> ratios; 81 std::pair<G4double,G4double> ratios;
88 ratios=theQuasiElastic->GetRatios(thePrimary 82 ratios=theQuasiElastic->GetRatios(thePrimary.GetTotalMomentum(),
89 thePrimary 83 thePrimary.GetDefinition()->GetPDGEncoding(),
90 theNucleus 84 theNucleus.GetZ_asInt(),
91 theNucleus 85 theNucleus.GetN_asInt());
92 #ifdef debug_scatter 86 #ifdef debug_scatter
93 G4cout << "G4QuasiElasticChannel::ratios 87 G4cout << "G4QuasiElasticChannel::ratios " << ratios.first << " x " <<ratios.second
94 << " = " << ratios.first*ratios. 88 << " = " << ratios.first*ratios.second << G4endl;
95 #endif 89 #endif
96 90
97 return ratios.first*ratios.second; 91 return ratios.first*ratios.second;
98 } 92 }
99 93
100 G4KineticTrackVector * G4QuasiElasticChannel:: 94 G4KineticTrackVector * G4QuasiElasticChannel::Scatter(G4Nucleus &theNucleus,
101 95 const G4DynamicParticle & thePrimary)
102 { 96 {
103 G4int A=theNucleus.GetA_asInt(); 97 G4int A=theNucleus.GetA_asInt();
104 G4int Z=theNucleus.GetZ_asInt(); 98 G4int Z=theNucleus.GetZ_asInt();
105 // build Nucleus and choose random nucleon 99 // build Nucleus and choose random nucleon to scatter with
106 the3DNucleus->Init(theNucleus.GetA_asInt(),t 100 the3DNucleus->Init(theNucleus.GetA_asInt(),theNucleus.GetZ_asInt());
107 const std::vector<G4Nucleon>& nucleons=the3D 101 const std::vector<G4Nucleon>& nucleons=the3DNucleus->GetNucleons();
108 G4double targetNucleusMass=the3DNucleus->Get 102 G4double targetNucleusMass=the3DNucleus->GetMass();
109 G4LorentzVector targetNucleus4Mom(0.,0.,0.,t 103 G4LorentzVector targetNucleus4Mom(0.,0.,0.,targetNucleusMass);
110 G4int index; 104 G4int index;
111 do { 105 do {
112 index=G4lrint((A-1)*G4UniformRand()); 106 index=G4lrint((A-1)*G4UniformRand());
113 } while (index < 0 || index >= static_cast<G << 107 } while (index < 0 || index >= static_cast<G4int>(nucleons.size()));
114 108
115 const G4ParticleDefinition * pDef= nucleons[ << 109 G4ParticleDefinition * pDef= nucleons[index].GetDefinition();
116 110
117 G4int resA=A - 1; 111 G4int resA=A - 1;
118 G4int resZ=Z - static_cast<int>(pDef->GetPDG 112 G4int resZ=Z - static_cast<int>(pDef->GetPDGCharge());
119 const G4ParticleDefinition* resDef; << 113 G4ParticleDefinition* resDef;
120 G4double residualNucleusMass; 114 G4double residualNucleusMass;
121 if(resZ) 115 if(resZ)
122 { 116 {
123 resDef=G4ParticleTable::GetParticleTable() << 117 resDef=G4ParticleTable::GetParticleTable()->FindIon(resZ,resA,0,resZ);
124 residualNucleusMass=resDef->GetPDGMass(); 118 residualNucleusMass=resDef->GetPDGMass();
125 } 119 }
126 else { 120 else {
127 resDef=G4Neutron::Neutron(); 121 resDef=G4Neutron::Neutron();
128 residualNucleusMass=resA * G4Neutron::Neut 122 residualNucleusMass=resA * G4Neutron::Neutron()->GetPDGMass();
129 } 123 }
130 #ifdef debug_scatter 124 #ifdef debug_scatter
131 G4cout<<"G4QElChan::Scatter: neutron - pr 125 G4cout<<"G4QElChan::Scatter: neutron - proton? A ="<<A<<", Z="<<Z<<", projName="
132 <<pDef->GetParticleName()<<G4endl; 126 <<pDef->GetParticleName()<<G4endl;
133 #endif 127 #endif
134 128
135 G4LorentzVector pNucleon=nucleons[index].Get 129 G4LorentzVector pNucleon=nucleons[index].Get4Momentum();
136 G4double residualNucleusEnergy=std::sqrt(sqr 130 G4double residualNucleusEnergy=std::sqrt(sqr(residualNucleusMass) +
137 pNu 131 pNucleon.vect().mag2());
138 pNucleon.setE(targetNucleusMass-residualNucl 132 pNucleon.setE(targetNucleusMass-residualNucleusEnergy);
139 G4LorentzVector residualNucleus4Mom=targetNu 133 G4LorentzVector residualNucleus4Mom=targetNucleus4Mom-pNucleon;
140 134
141 std::pair<G4LorentzVector,G4LorentzVector> r 135 std::pair<G4LorentzVector,G4LorentzVector> result;
142 136
143 result=theQuasiElastic->Scatter(pDef->GetPDG 137 result=theQuasiElastic->Scatter(pDef->GetPDGEncoding(),pNucleon,
144 thePrimary.G 138 thePrimary.GetDefinition()->GetPDGEncoding(),
145 thePrimary.G 139 thePrimary.Get4Momentum());
146 G4LorentzVector scatteredHadron4Mom; 140 G4LorentzVector scatteredHadron4Mom;
147 if (result.first.e() > 0.) 141 if (result.first.e() > 0.)
148 scatteredHadron4Mom=result.second; 142 scatteredHadron4Mom=result.second;
149 else { //scatter failed 143 else { //scatter failed
150 //G4cout << "Warning - G4QuasiElasticChann 144 //G4cout << "Warning - G4QuasiElasticChannel::Scatter no scattering" << G4endl;
151 //return 0; //no scatter 145 //return 0; //no scatter
152 scatteredHadron4Mom=thePrimary.Get4Momentu 146 scatteredHadron4Mom=thePrimary.Get4Momentum();
153 residualNucleus4Mom=G4LorentzVector(0.,0., 147 residualNucleus4Mom=G4LorentzVector(0.,0.,0.,targetNucleusMass);
154 resDef=G4ParticleTable::GetParticleTable() << 148 resDef=G4ParticleTable::GetParticleTable()->FindIon(Z,A,0,Z);
155 } 149 }
156 150
157 #ifdef debug_scatter 151 #ifdef debug_scatter
158 G4LorentzVector EpConservation=pNucleon+theP 152 G4LorentzVector EpConservation=pNucleon+thePrimary.Get4Momentum()
159 - result.firs 153 - result.first - result.second;
160 if ( (EpConservation.vect().mag2() > .01*M 154 if ( (EpConservation.vect().mag2() > .01*MeV*MeV )
161 || (std::abs(EpConservation.e()) > 0.1 * 155 || (std::abs(EpConservation.e()) > 0.1 * MeV ) )
162 { 156 {
163 G4cout << "Warning - G4QuasiElasticChannel 157 G4cout << "Warning - G4QuasiElasticChannel::Scatter E-p non conservation : "
164 << EpConservation << G4endl; 158 << EpConservation << G4endl;
165 } 159 }
166 #endif 160 #endif
167 161
168 G4KineticTrackVector * ktv = new G4KineticTr 162 G4KineticTrackVector * ktv = new G4KineticTrackVector();
169 G4KineticTrack * sPrim=new G4KineticTrack(th 163 G4KineticTrack * sPrim=new G4KineticTrack(thePrimary.GetDefinition(),
170 0. 164 0.,G4ThreeVector(0), scatteredHadron4Mom);
171 sPrim->SetCreatorModelID( secID ); <<
172 ktv->push_back(sPrim); 165 ktv->push_back(sPrim);
173 if (result.first.e() > 0.) 166 if (result.first.e() > 0.)
174 { 167 {
175 G4KineticTrack * sNuc=new G4KineticTrack(p 168 G4KineticTrack * sNuc=new G4KineticTrack(pDef, 0.,G4ThreeVector(0), result.first);
176 sNuc->SetCreatorModelID( secID ); <<
177 ktv->push_back(sNuc); 169 ktv->push_back(sNuc);
178 } 170 }
179 if(resZ || resA==1) // For the only neutron 171 if(resZ || resA==1) // For the only neutron or for tnuclei with Z>0
180 { 172 {
181 G4KineticTrack * rNuc=new G4KineticTrack(r 173 G4KineticTrack * rNuc=new G4KineticTrack(resDef,
182 0.,G4ThreeVector(0) 174 0.,G4ThreeVector(0), residualNucleus4Mom);
183 rNuc->SetCreatorModelID( secID ); <<
184 ktv->push_back(rNuc); 175 ktv->push_back(rNuc);
185 } 176 }
186 else // The residual nucleus consists of onl 177 else // The residual nucleus consists of only neutrons
187 { 178 {
188 residualNucleus4Mom/=resA; // Split 4- 179 residualNucleus4Mom/=resA; // Split 4-mom of A*n system equally
189 for(G4int in=0; in<resA; in++) // Loop ove 180 for(G4int in=0; in<resA; in++) // Loop over neutrons in A*n system.
190 { 181 {
191 G4KineticTrack* rNuc=new G4KineticTrack( 182 G4KineticTrack* rNuc=new G4KineticTrack(resDef,
192 0.,G4ThreeVector(0) 183 0.,G4ThreeVector(0), residualNucleus4Mom);
193 rNuc->SetCreatorModelID( secID ); <<
194 ktv->push_back(rNuc); 184 ktv->push_back(rNuc);
195 } 185 }
196 } 186 }
197 #ifdef debug_scatter 187 #ifdef debug_scatter
198 G4cout<<"G4QElC::Scat: Nucleon: "<<result.fi 188 G4cout<<"G4QElC::Scat: Nucleon: "<<result.first <<" mass "<<result.first.mag() << G4endl;
199 G4cout<<"G4QElC::Scat: Project: "<<result.se 189 G4cout<<"G4QElC::Scat: Project: "<<result.second<<" mass "<<result.second.mag()<< G4endl;
200 #endif 190 #endif
201 return ktv; 191 return ktv;
202 } 192 }
203 193