Changeset 1347 for trunk/source/processes/hadronic/models/high_energy/src/G4HEAntiNeutronInelastic.cc
- Timestamp:
- Dec 22, 2010, 3:52:27 PM (13 years ago)
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trunk/source/processes/hadronic/models/high_energy/src/G4HEAntiNeutronInelastic.cc
r1340 r1347 24 24 // ******************************************************************** 25 25 // 26 // 27 // $Id: G4HEAntiNeutronInelastic.cc,v 1.15 2008/03/17 20:49:17 dennis Exp $ 28 // GEANT4 tag $Name: geant4-09-03-ref-09 $ 29 // 26 // $Id: G4HEAntiNeutronInelastic.cc,v 1.17 2010/11/29 05:44:44 dennis Exp $ 27 // GEANT4 tag $Name: geant4-09-04-ref-00 $ 30 28 // 31 29 … … 33 31 #include "G4ios.hh" 34 32 35 //36 33 // G4 Process: Gheisha High Energy Collision model. 37 34 // This includes the high energy cascading model, the two-body-resonance model 38 // and the low energy two-body model. Not included are the low energy stuff like39 // nuclear reactions, nuclear fission without any cascading and all processes for40 // p articles at rest.35 // and the low energy two-body model. Not included is the low energy stuff 36 // like nuclear reactions, nuclear fission without any cascading and all 37 // processes for particles at rest. 41 38 // First work done by J.L.Chuma and F.W.Jones, TRIUMF, June 96. 42 39 // H. Fesefeldt, RWTH-Aachen, 23-October-1996 … … 45 42 #include "G4HEAntiNeutronInelastic.hh" 46 43 47 G4HadFinalState * G4HEAntiNeutronInelastic:: 48 ApplyYourself( const G4HadProjectile &aTrack, G4Nucleus &targetNucleus ) 49 { 50 G4HEVector * pv = new G4HEVector[MAXPART]; 51 const G4HadProjectile *aParticle = &aTrack; 52 // G4DynamicParticle *originalTarget = targetNucleus.ReturnTargetParticle(); 53 const G4double atomicWeight = targetNucleus.GetN(); 54 const G4double atomicNumber = targetNucleus.GetZ(); 55 G4HEVector incidentParticle(aParticle); 56 57 G4int incidentCode = incidentParticle.getCode(); 58 G4double incidentMass = incidentParticle.getMass(); 59 G4double incidentTotalEnergy = incidentParticle.getEnergy(); 60 G4double incidentTotalMomentum = incidentParticle.getTotalMomentum(); 61 G4double incidentKineticEnergy = incidentTotalEnergy - incidentMass; 62 63 if(incidentKineticEnergy < 1.) 64 { 65 G4cout << "GHEAntiNeutronInelastic: incident energy < 1 GeV" << G4endl;; 66 } 67 if(verboseLevel > 1) 68 { 69 G4cout << "G4HEAntiNeutronInelastic::ApplyYourself" << G4endl; 70 G4cout << "incident particle " << incidentParticle.getName() 71 << "mass " << incidentMass 72 << "kinetic energy " << incidentKineticEnergy 73 << G4endl; 74 G4cout << "target material with (A,Z) = (" 75 << atomicWeight << "," << atomicNumber << ")" << G4endl; 76 } 77 78 G4double inelasticity = NuclearInelasticity(incidentKineticEnergy, 79 atomicWeight, atomicNumber); 80 if(verboseLevel > 1) 81 G4cout << "nuclear inelasticity = " << inelasticity << G4endl; 44 G4HadFinalState* 45 G4HEAntiNeutronInelastic::ApplyYourself(const G4HadProjectile &aTrack, 46 G4Nucleus &targetNucleus) 47 { 48 G4HEVector* pv = new G4HEVector[MAXPART]; 49 const G4HadProjectile* aParticle = &aTrack; 50 const G4double atomicWeight = targetNucleus.GetN(); 51 const G4double atomicNumber = targetNucleus.GetZ(); 52 G4HEVector incidentParticle(aParticle); 53 54 G4int incidentCode = incidentParticle.getCode(); 55 G4double incidentMass = incidentParticle.getMass(); 56 G4double incidentTotalEnergy = incidentParticle.getEnergy(); 57 G4double incidentTotalMomentum = incidentParticle.getTotalMomentum(); 58 G4double incidentKineticEnergy = incidentTotalEnergy - incidentMass; 59 60 if (incidentKineticEnergy < 1.) 61 G4cout << "GHEAntiNeutronInelastic: incident energy < 1 GeV" << G4endl;; 62 63 if (verboseLevel > 1) { 64 G4cout << "G4HEAntiNeutronInelastic::ApplyYourself" << G4endl; 65 G4cout << "incident particle " << incidentParticle.getName() 66 << "mass " << incidentMass 67 << "kinetic energy " << incidentKineticEnergy 68 << G4endl; 69 G4cout << "target material with (A,Z) = (" 70 << atomicWeight << "," << atomicNumber << ")" << G4endl; 71 } 72 73 G4double inelasticity = NuclearInelasticity(incidentKineticEnergy, 74 atomicWeight, atomicNumber); 75 if (verboseLevel > 1) 76 G4cout << "nuclear inelasticity = " << inelasticity << G4endl; 82 77 83 78 incidentKineticEnergy -= inelasticity; 84 79 85 86 87 88 G4double excitation= NuclearExcitation(incidentKineticEnergy,89 90 91 92 if(verboseLevel > 1)93 80 G4double excitationEnergyGNP = 0.; 81 G4double excitationEnergyDTA = 0.; 82 83 G4double excitation = NuclearExcitation(incidentKineticEnergy, 84 atomicWeight, atomicNumber, 85 excitationEnergyGNP, 86 excitationEnergyDTA); 87 if (verboseLevel > 1) 88 G4cout << "nuclear excitation = " << excitation << excitationEnergyGNP 94 89 << excitationEnergyDTA << G4endl; 95 90 96 97 incidentKineticEnergy -= excitation; 98 incidentTotalEnergy = incidentKineticEnergy + incidentMass; 99 incidentTotalMomentum = std::sqrt( (incidentTotalEnergy-incidentMass) 100 *(incidentTotalEnergy+incidentMass)); 101 102 103 G4HEVector targetParticle; 104 if(G4UniformRand() < atomicNumber/atomicWeight) 105 { 106 targetParticle.setDefinition("Proton"); 107 } 108 else 109 { 110 targetParticle.setDefinition("Neutron"); 111 } 112 113 G4double targetMass = targetParticle.getMass(); 114 G4double centerOfMassEnergy = std::sqrt( incidentMass*incidentMass + targetMass*targetMass 115 + 2.0*targetMass*incidentTotalEnergy); 116 G4double availableEnergy = centerOfMassEnergy - targetMass - incidentMass; 117 118 // this was the meaning of inElastic in the 119 // original Gheisha stand-alone version. 120 // G4bool inElastic = InElasticCrossSectionInFirstInt 121 // (availableEnergy, incidentCode, incidentTotalMomentum); 122 // by unknown reasons, it has been replaced 123 // to the following code in Geant??? 124 G4bool inElastic = true; 125 // if (G4UniformRand() < elasticCrossSection/totalCrossSection) inElastic = false; 126 127 vecLength = 0; 91 incidentKineticEnergy -= excitation; 92 incidentTotalEnergy = incidentKineticEnergy + incidentMass; 93 incidentTotalMomentum = std::sqrt( (incidentTotalEnergy-incidentMass) 94 *(incidentTotalEnergy+incidentMass)); 95 96 G4HEVector targetParticle; 97 if (G4UniformRand() < atomicNumber/atomicWeight) { 98 targetParticle.setDefinition("Proton"); 99 } else { 100 targetParticle.setDefinition("Neutron"); 101 } 102 103 G4double targetMass = targetParticle.getMass(); 104 G4double centerOfMassEnergy = std::sqrt(incidentMass*incidentMass 105 + targetMass*targetMass 106 + 2.0*targetMass*incidentTotalEnergy); 107 G4double availableEnergy = centerOfMassEnergy - targetMass - incidentMass; 108 109 G4bool inElastic = true; 110 vecLength = 0; 128 111 129 if(verboseLevel > 1)130 112 if (verboseLevel > 1) 113 G4cout << "ApplyYourself: CallFirstIntInCascade for particle " 131 114 << incidentCode << G4endl; 132 115 133 116 G4bool successful = false; 134 117 135 if(inElastic || (!inElastic && atomicWeight < 1.5)) 136 { 137 FirstIntInCasAntiNeutron(inElastic, availableEnergy, pv, vecLength, 138 incidentParticle, targetParticle, atomicWeight); 139 140 if(verboseLevel > 1) 141 G4cout << "ApplyYourself::StrangeParticlePairProduction" << G4endl; 142 143 144 if ((vecLength > 0) && (availableEnergy > 1.)) 145 StrangeParticlePairProduction( availableEnergy, centerOfMassEnergy, 146 pv, vecLength, 147 incidentParticle, targetParticle); 148 HighEnergyCascading( successful, pv, vecLength, 149 excitationEnergyGNP, excitationEnergyDTA, 150 incidentParticle, targetParticle, 151 atomicWeight, atomicNumber); 152 if (!successful) 153 HighEnergyClusterProduction( successful, pv, vecLength, 154 excitationEnergyGNP, excitationEnergyDTA, 155 incidentParticle, targetParticle, 156 atomicWeight, atomicNumber); 157 if (!successful) 158 MediumEnergyCascading( successful, pv, vecLength, 159 excitationEnergyGNP, excitationEnergyDTA, 160 incidentParticle, targetParticle, 161 atomicWeight, atomicNumber); 162 163 if (!successful) 164 MediumEnergyClusterProduction( successful, pv, vecLength, 165 excitationEnergyGNP, excitationEnergyDTA, 166 incidentParticle, targetParticle, 167 atomicWeight, atomicNumber); 168 if (!successful) 169 QuasiElasticScattering( successful, pv, vecLength, 170 excitationEnergyGNP, excitationEnergyDTA, 171 incidentParticle, targetParticle, 172 atomicWeight, atomicNumber); 173 } 174 if (!successful) 175 { 176 ElasticScattering( successful, pv, vecLength, 177 incidentParticle, 178 atomicWeight, atomicNumber); 179 } 180 181 if (!successful) 182 { 183 G4cout << "GHEInelasticInteraction::ApplyYourself fails to produce final state particles" << G4endl; 184 } 185 FillParticleChange(pv, vecLength); 186 delete [] pv; 187 theParticleChange.SetStatusChange(stopAndKill); 188 return & theParticleChange; 189 } 118 FirstIntInCasAntiNeutron(inElastic, availableEnergy, pv, vecLength, 119 incidentParticle, targetParticle, atomicWeight); 120 121 if (verboseLevel > 1) 122 G4cout << "ApplyYourself::StrangeParticlePairProduction" << G4endl; 123 124 if ((vecLength > 0) && (availableEnergy > 1.)) 125 StrangeParticlePairProduction(availableEnergy, centerOfMassEnergy, 126 pv, vecLength, 127 incidentParticle, targetParticle); 128 HighEnergyCascading(successful, pv, vecLength, 129 excitationEnergyGNP, excitationEnergyDTA, 130 incidentParticle, targetParticle, 131 atomicWeight, atomicNumber); 132 if (!successful) 133 HighEnergyClusterProduction(successful, pv, vecLength, 134 excitationEnergyGNP, excitationEnergyDTA, 135 incidentParticle, targetParticle, 136 atomicWeight, atomicNumber); 137 if (!successful) 138 MediumEnergyCascading(successful, pv, vecLength, 139 excitationEnergyGNP, excitationEnergyDTA, 140 incidentParticle, targetParticle, 141 atomicWeight, atomicNumber); 142 143 if (!successful) 144 MediumEnergyClusterProduction(successful, pv, vecLength, 145 excitationEnergyGNP, excitationEnergyDTA, 146 incidentParticle, targetParticle, 147 atomicWeight, atomicNumber); 148 if (!successful) 149 QuasiElasticScattering(successful, pv, vecLength, 150 excitationEnergyGNP, excitationEnergyDTA, 151 incidentParticle, targetParticle, 152 atomicWeight, atomicNumber); 153 if (!successful) 154 ElasticScattering(successful, pv, vecLength, 155 incidentParticle, 156 atomicWeight, atomicNumber); 157 158 if (!successful) 159 G4cout << "GHEInelasticInteraction::ApplyYourself fails to produce final state particles" 160 << G4endl; 161 162 FillParticleChange(pv, vecLength); 163 delete [] pv; 164 theParticleChange.SetStatusChange(stopAndKill); 165 return &theParticleChange; 166 } 167 190 168 191 169 void 192 G4HEAntiNeutronInelastic::FirstIntInCasAntiNeutron( G4bool &inElastic, 193 const G4double availableEnergy, 194 G4HEVector pv[], 195 G4int &vecLen, 196 G4HEVector incidentParticle, 197 G4HEVector targetParticle, 198 const G4double atomicWeight) 199 200 // AntiNeutron undergoes interaction with nucleon within a nucleus. Check if it is 201 // energetically possible to produce pions/kaons. In not, assume nuclear excitation 202 // occurs and input particle is degraded in energy. No other particles are produced. 170 G4HEAntiNeutronInelastic::FirstIntInCasAntiNeutron(G4bool& inElastic, 171 const G4double availableEnergy, 172 G4HEVector pv[], 173 G4int& vecLen, 174 const G4HEVector& incidentParticle, 175 const G4HEVector& targetParticle, 176 const G4double atomicWeight) 177 178 // AntiNeutron undergoes interaction with nucleon within a nucleus. Check if 179 // it is energetically possible to produce pions/kaons. If not, assume 180 // nuclear excitation occurs and input particle is degraded in energy. No 181 // other particles are produced. 203 182 // If reaction is possible, find the correct number of pions/protons/neutrons 204 183 // produced using an interpolation to multiplicity data. Replace some pions or 205 184 // protons/neutrons by kaons or strange baryons according to the average 206 185 // multiplicity per inelastic reaction. 207 208 { 209 static const G4double expxu = std::log(MAXFLOAT); // upper bound for arg. of exp 210 static const G4double expxl = -expxu; // lower bound for arg. of exp 211 212 static const G4double protb = 0.7; 213 static const G4double neutb = 0.7; 214 static const G4double c = 1.25; 215 216 static const G4int numMul = 1200; 217 static const G4int numMulAn = 400; 218 static const G4int numSec = 60; 219 220 G4int neutronCode = Neutron.getCode(); 221 G4int protonCode = Proton.getCode(); 222 223 G4int targetCode = targetParticle.getCode(); 224 // G4double incidentMass = incidentParticle.getMass(); 225 // G4double incidentEnergy = incidentParticle.getEnergy(); 226 G4double incidentTotalMomentum = incidentParticle.getTotalMomentum(); 227 228 static G4bool first = true; 229 static G4double protmul[numMul], protnorm[numSec]; // proton constants 230 static G4double protmulAn[numMulAn],protnormAn[numSec]; 231 static G4double neutmul[numMul], neutnorm[numSec]; // neutron constants 232 static G4double neutmulAn[numMulAn],neutnormAn[numSec]; 233 234 // misc. local variables 235 // np = number of pi+, nm = number of pi-, nz = number of pi0 236 237 G4int i, counter, nt, np, nm, nz; 186 { 187 static const G4double expxu = std::log(MAXFLOAT); // upper bound for arg. of exp 188 static const G4double expxl = -expxu; // lower bound for arg. of exp 189 190 static const G4double protb = 0.7; 191 static const G4double neutb = 0.7; 192 static const G4double c = 1.25; 193 194 static const G4int numMul = 1200; 195 static const G4int numMulAn = 400; 196 static const G4int numSec = 60; 197 198 G4int neutronCode = Neutron.getCode(); 199 G4int protonCode = Proton.getCode(); 200 201 G4int targetCode = targetParticle.getCode(); 202 G4double incidentTotalMomentum = incidentParticle.getTotalMomentum(); 203 204 static G4bool first = true; 205 static G4double protmul[numMul], protnorm[numSec]; // proton constants 206 static G4double protmulAn[numMulAn],protnormAn[numSec]; 207 static G4double neutmul[numMul], neutnorm[numSec]; // neutron constants 208 static G4double neutmulAn[numMulAn],neutnormAn[numSec]; 209 210 // misc. local variables 211 // np = number of pi+, nm = number of pi-, nz = number of pi0 212 213 G4int i, counter, nt, np, nm, nz; 238 214 239 215 if( first ) 240 { 216 { // compute normalization constants, this will only be done once 241 217 first = false; 242 218 for( i=0; i<numMul ; i++ ) protmul[i] = 0.0;
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