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Please see the license in the file LICENSE and URL above * 16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. * 17 // * 17 // * * 18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and * 19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. * 20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or * 21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its * 22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your * 23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. * 24 // ******************************************* 24 // ******************************************************************** 25 // 25 // >> 26 // $Id: G4PAIModel.cc 90583 2015-06-04 11:16:41Z gcosmo $ 26 // 27 // 27 // ------------------------------------------- 28 // ------------------------------------------------------------------- 28 // 29 // 29 // GEANT4 Class 30 // GEANT4 Class 30 // File name: G4PAIModel.cc 31 // File name: G4PAIModel.cc 31 // 32 // 32 // Author: Vladimir.Grichine@cern.ch on base o 33 // Author: Vladimir.Grichine@cern.ch on base of V.Ivanchenko model interface 33 // 34 // 34 // Creation date: 05.10.2003 35 // Creation date: 05.10.2003 35 // 36 // 36 // Modifications: 37 // Modifications: 37 // 38 // 38 // 17.08.04 V.Grichine, bug fixed for Tkin<=0 39 // 17.08.04 V.Grichine, bug fixed for Tkin<=0 in SampleSecondary 39 // 16.08.04 V.Grichine, bug fixed in massRatio 40 // 16.08.04 V.Grichine, bug fixed in massRatio for DEDX, CrossSection, 40 // SampleSecondary 41 // SampleSecondary 41 // 08.04.05 Major optimisation of internal int 42 // 08.04.05 Major optimisation of internal interfaces (V.Ivantchenko) 42 // 26.07.09 Fixed logic to work with several m 43 // 26.07.09 Fixed logic to work with several materials (V.Ivantchenko) 43 // 21.11.10 V. Grichine verbose flag for proto 44 // 21.11.10 V. Grichine verbose flag for protons and G4PAYySection to 44 // check sandia table 45 // check sandia table 45 // 12.06.13 V. Grichine Bug fixed in SampleSec 46 // 12.06.13 V. Grichine Bug fixed in SampleSecondaries for scaled Tkin 46 // (fMass -> proton_mass_c2) 47 // (fMass -> proton_mass_c2) 47 // 19.08.13 V.Ivanchenko extract data handling 48 // 19.08.13 V.Ivanchenko extract data handling to G4PAIModelData class 48 // added sharing of internal data bet 49 // added sharing of internal data between threads (MT migration) 49 // 50 // 50 51 51 #include "G4PAIModel.hh" 52 #include "G4PAIModel.hh" 52 53 53 #include "G4SystemOfUnits.hh" 54 #include "G4SystemOfUnits.hh" 54 #include "G4PhysicalConstants.hh" 55 #include "G4PhysicalConstants.hh" 55 #include "G4Region.hh" 56 #include "G4Region.hh" 56 #include "G4MaterialCutsCouple.hh" 57 #include "G4MaterialCutsCouple.hh" 57 #include "G4MaterialTable.hh" 58 #include "G4MaterialTable.hh" 58 #include "G4RegionStore.hh" 59 #include "G4RegionStore.hh" 59 60 60 #include "Randomize.hh" 61 #include "Randomize.hh" 61 #include "G4Electron.hh" 62 #include "G4Electron.hh" 62 #include "G4Positron.hh" 63 #include "G4Positron.hh" 63 #include "G4Poisson.hh" 64 #include "G4Poisson.hh" 64 #include "G4Step.hh" 65 #include "G4Step.hh" 65 #include "G4Material.hh" 66 #include "G4Material.hh" 66 #include "G4DynamicParticle.hh" 67 #include "G4DynamicParticle.hh" 67 #include "G4ParticleDefinition.hh" 68 #include "G4ParticleDefinition.hh" 68 #include "G4ParticleChangeForLoss.hh" 69 #include "G4ParticleChangeForLoss.hh" 69 #include "G4PAIModelData.hh" 70 #include "G4PAIModelData.hh" 70 #include "G4DeltaAngle.hh" 71 #include "G4DeltaAngle.hh" 71 72 72 ////////////////////////////////////////////// 73 //////////////////////////////////////////////////////////////////////// 73 74 74 using namespace std; 75 using namespace std; 75 76 76 G4PAIModel::G4PAIModel(const G4ParticleDefinit 77 G4PAIModel::G4PAIModel(const G4ParticleDefinition* p, const G4String& nam) 77 : G4VEmModel(nam),G4VEmFluctuationModel(nam) 78 : G4VEmModel(nam),G4VEmFluctuationModel(nam), 78 fVerbose(0), 79 fVerbose(0), 79 fModelData(nullptr), << 80 fModelData(0), 80 fParticle(nullptr) << 81 fParticle(0) 81 { 82 { 82 fElectron = G4Electron::Electron(); 83 fElectron = G4Electron::Electron(); 83 fPositron = G4Positron::Positron(); 84 fPositron = G4Positron::Positron(); 84 85 85 fParticleChange = nullptr; << 86 fParticleChange = 0; 86 87 87 if(p) { SetParticle(p); } 88 if(p) { SetParticle(p); } 88 else { SetParticle(fElectron); } 89 else { SetParticle(fElectron); } 89 90 90 // default generator 91 // default generator 91 SetAngularDistribution(new G4DeltaAngle()); 92 SetAngularDistribution(new G4DeltaAngle()); 92 fLowestTcut = 12.5*CLHEP::eV; << 93 } 93 } 94 94 95 ////////////////////////////////////////////// 95 //////////////////////////////////////////////////////////////////////////// 96 96 97 G4PAIModel::~G4PAIModel() 97 G4PAIModel::~G4PAIModel() 98 { 98 { 99 if(IsMaster()) { delete fModelData; } 99 if(IsMaster()) { delete fModelData; } 100 } 100 } 101 101 102 ////////////////////////////////////////////// 102 //////////////////////////////////////////////////////////////////////////// 103 103 104 void G4PAIModel::Initialise(const G4ParticleDe 104 void G4PAIModel::Initialise(const G4ParticleDefinition* p, 105 const G4DataVector& cuts) 105 const G4DataVector& cuts) 106 { 106 { 107 if(fVerbose > 1) { << 107 if(fVerbose > 0) { 108 G4cout<<"G4PAIModel::Initialise for "<<p-> 108 G4cout<<"G4PAIModel::Initialise for "<<p->GetParticleName()<<G4endl; 109 } 109 } 110 SetParticle(p); 110 SetParticle(p); 111 fParticleChange = GetParticleChangeForLoss() 111 fParticleChange = GetParticleChangeForLoss(); 112 112 113 if(IsMaster()) { 113 if(IsMaster()) { 114 114 115 delete fModelData; 115 delete fModelData; 116 fMaterialCutsCoupleVector.clear(); 116 fMaterialCutsCoupleVector.clear(); 117 if(fVerbose > 1) { << 117 if(fVerbose > 0) { 118 G4cout << "G4PAIModel instantiates data 118 G4cout << "G4PAIModel instantiates data for " << p->GetParticleName() 119 << G4endl; 119 << G4endl; 120 } 120 } 121 G4double tmin = LowEnergyLimit()*fRatio; 121 G4double tmin = LowEnergyLimit()*fRatio; 122 G4double tmax = HighEnergyLimit()*fRatio; 122 G4double tmax = HighEnergyLimit()*fRatio; 123 fModelData = new G4PAIModelData(tmin, tmax 123 fModelData = new G4PAIModelData(tmin, tmax, fVerbose); 124 124 125 // Prepare initialization 125 // Prepare initialization 126 const G4MaterialTable* theMaterialTable = 126 const G4MaterialTable* theMaterialTable = G4Material::GetMaterialTable(); 127 std::size_t numOfMat = G4Material::GetNu << 127 size_t numOfMat = G4Material::GetNumberOfMaterials(); 128 std::size_t numRegions = fPAIRegionVector. << 128 size_t numRegions = fPAIRegionVector.size(); 129 129 130 // protect for unit tests 130 // protect for unit tests 131 if(0 == numRegions) { 131 if(0 == numRegions) { 132 G4Exception("G4PAIModel::Initialise()"," 132 G4Exception("G4PAIModel::Initialise()","em0106",JustWarning, 133 "no G4Regions are registered 133 "no G4Regions are registered for the PAI model - World is used"); 134 fPAIRegionVector.push_back(G4RegionStore 134 fPAIRegionVector.push_back(G4RegionStore::GetInstance() 135 ->GetRegion("DefaultRegionForTheWorld 135 ->GetRegion("DefaultRegionForTheWorld", false)); 136 numRegions = 1; 136 numRegions = 1; 137 } 137 } 138 138 139 if(fVerbose > 1) { << 139 if(fVerbose > 0) { 140 G4cout << "G4PAIModel is defined for " < 140 G4cout << "G4PAIModel is defined for " << numRegions << " regions " 141 << "; number of materials " << numOfMat << 141 << G4endl; >> 142 G4cout << " total number of materials " << numOfMat << G4endl; 142 } 143 } 143 for(std::size_t iReg = 0; iReg<numRegions; << 144 for(size_t iReg = 0; iReg<numRegions; ++iReg) { 144 const G4Region* curReg = fPAIRegionVecto 145 const G4Region* curReg = fPAIRegionVector[iReg]; 145 G4Region* reg = const_cast<G4Region*>(cu 146 G4Region* reg = const_cast<G4Region*>(curReg); 146 147 147 for(std::size_t jMat = 0; jMat<numOfMat; << 148 for(size_t jMat = 0; jMat<numOfMat; ++jMat) { 148 G4Material* mat = (*theMaterialTable)[jMat]; 149 G4Material* mat = (*theMaterialTable)[jMat]; 149 const G4MaterialCutsCouple* cutCouple = reg- 150 const G4MaterialCutsCouple* cutCouple = reg->FindCouple(mat); 150 std::size_t n = fMaterialCutsCoupleVector.si << 151 size_t n = fMaterialCutsCoupleVector.size(); 151 if(nullptr != cutCouple) { << 152 /* 152 if(fVerbose > 1) { << 153 G4cout << "Region: " << reg->GetName() << " " << reg >> 154 << " Couple " << cutCouple >> 155 << " PAI defined for " << n << " couples" >> 156 << " jMat= " << jMat << " " << mat->GetName() >> 157 << G4endl; >> 158 */ >> 159 if(cutCouple) { >> 160 if(fVerbose > 0) { 153 G4cout << "Region <" << curReg->GetName( 161 G4cout << "Region <" << curReg->GetName() << "> mat <" 154 << mat->GetName() << "> CoupleIndex= " 162 << mat->GetName() << "> CoupleIndex= " 155 << cutCouple->GetIndex() 163 << cutCouple->GetIndex() 156 << " " << p->GetParticleName() 164 << " " << p->GetParticleName() 157 << " cutsize= " << cuts.size() << G4end 165 << " cutsize= " << cuts.size() << G4endl; 158 } 166 } 159 // check if this couple is not already ini 167 // check if this couple is not already initialized 160 G4bool isnew = true; 168 G4bool isnew = true; 161 if(0 < n) { 169 if(0 < n) { 162 for(std::size_t i=0; i<n; ++i) { << 170 for(size_t i=0; i<n; ++i) { 163 G4cout << i << G4endl; << 164 if(cutCouple == fMaterialCutsCoupleVec 171 if(cutCouple == fMaterialCutsCoupleVector[i]) { 165 isnew = false; 172 isnew = false; 166 break; 173 break; 167 } 174 } 168 } 175 } 169 } 176 } 170 // initialise data banks 177 // initialise data banks 171 // G4cout << " isNew: " << isnew << " " << 178 //G4cout << " isNew: " << isnew << " " << cutCouple << G4endl; 172 if(isnew) { 179 if(isnew) { 173 fMaterialCutsCoupleVector.push_back(cutC 180 fMaterialCutsCoupleVector.push_back(cutCouple); 174 fModelData->Initialise(cutCouple, this); 181 fModelData->Initialise(cutCouple, this); 175 } 182 } 176 } 183 } 177 } 184 } 178 } 185 } 179 InitialiseElementSelectors(p, cuts); 186 InitialiseElementSelectors(p, cuts); 180 } 187 } 181 } 188 } 182 189 183 ////////////////////////////////////////////// 190 ///////////////////////////////////////////////////////////////////////// 184 191 185 void G4PAIModel::InitialiseLocal(const G4Parti << 192 void G4PAIModel::InitialiseLocal(const G4ParticleDefinition* p, 186 G4VEmModel* masterModel) 193 G4VEmModel* masterModel) 187 { 194 { >> 195 SetParticle(p); 188 fModelData = static_cast<G4PAIModel*>(master 196 fModelData = static_cast<G4PAIModel*>(masterModel)->GetPAIModelData(); 189 fMaterialCutsCoupleVector = 197 fMaterialCutsCoupleVector = 190 static_cast<G4PAIModel*>(masterModel)->Get 198 static_cast<G4PAIModel*>(masterModel)->GetVectorOfCouples(); 191 SetElementSelectors(masterModel->GetElementS 199 SetElementSelectors(masterModel->GetElementSelectors()); 192 } 200 } 193 201 194 ////////////////////////////////////////////// 202 ////////////////////////////////////////////////////////////////////////////// 195 203 196 G4double G4PAIModel::MinEnergyCut(const G4Part << 197 const G4MaterialCutsCouple*) << 198 { << 199 return fLowestTcut; << 200 } << 201 << 202 ////////////////////////////////////////////// << 203 << 204 G4double G4PAIModel::ComputeDEDXPerVolume(cons 204 G4double G4PAIModel::ComputeDEDXPerVolume(const G4Material*, 205 const G4ParticleDefinition* p, 205 const G4ParticleDefinition* p, 206 G4double kineticEnergy, 206 G4double kineticEnergy, 207 G4double cutEnergy) 207 G4double cutEnergy) 208 { 208 { >> 209 //G4cout << "===1=== " << CurrentCouple() >> 210 // << " idx= " << CurrentCouple()->GetIndex() >> 211 // << " " << fMaterialCutsCoupleVector[0] >> 212 // << G4endl; 209 G4int coupleIndex = FindCoupleIndex(CurrentC 213 G4int coupleIndex = FindCoupleIndex(CurrentCouple()); >> 214 //G4cout << "===2=== " << coupleIndex << G4endl; 210 if(0 > coupleIndex) { return 0.0; } 215 if(0 > coupleIndex) { return 0.0; } 211 216 212 G4double cut = std::min(MaxSecondaryEnergy(p 217 G4double cut = std::min(MaxSecondaryEnergy(p, kineticEnergy), cutEnergy); >> 218 213 G4double scaledTkin = kineticEnergy*fRatio; 219 G4double scaledTkin = kineticEnergy*fRatio; 214 G4double dedx = fChargeSquare*fModelData->DE << 220 215 return dedx; << 221 return fChargeSquare*fModelData->DEDXPerVolume(coupleIndex, scaledTkin, >> 222 cut); 216 } 223 } 217 224 218 ////////////////////////////////////////////// 225 ///////////////////////////////////////////////////////////////////////// 219 226 220 G4double G4PAIModel::CrossSectionPerVolume( co 227 G4double G4PAIModel::CrossSectionPerVolume( const G4Material*, 221 const G4ParticleDefinition* p, 228 const G4ParticleDefinition* p, 222 G4double kineticEnergy, 229 G4double kineticEnergy, 223 G4double cutEnergy, 230 G4double cutEnergy, 224 G4double maxEnergy ) 231 G4double maxEnergy ) 225 { 232 { >> 233 //G4cout << "===3=== " << CurrentCouple() >> 234 // << " idx= " << CurrentCouple()->GetIndex() >> 235 // << " " << fMaterialCutsCoupleVector[0] >> 236 // << G4endl; 226 G4int coupleIndex = FindCoupleIndex(CurrentC 237 G4int coupleIndex = FindCoupleIndex(CurrentCouple()); >> 238 //G4cout << "===4=== " << coupleIndex << G4endl; 227 if(0 > coupleIndex) { return 0.0; } 239 if(0 > coupleIndex) { return 0.0; } 228 240 229 G4double tmax = std::min(MaxSecondaryEnergy( 241 G4double tmax = std::min(MaxSecondaryEnergy(p, kineticEnergy), maxEnergy); 230 if(tmax <= cutEnergy) { return 0.0; } 242 if(tmax <= cutEnergy) { return 0.0; } 231 243 232 G4double scaledTkin = kineticEnergy*fRatio; 244 G4double scaledTkin = kineticEnergy*fRatio; 233 G4double xs = fChargeSquare*fModelData->Cros << 245 234 scal << 246 return fChargeSquare*fModelData->CrossSectionPerVolume(coupleIndex, 235 return xs; << 247 scaledTkin, >> 248 cutEnergy, >> 249 tmax); 236 } 250 } 237 251 238 ////////////////////////////////////////////// 252 /////////////////////////////////////////////////////////////////////////// 239 // 253 // 240 // It is analog of PostStepDoIt in terms of se 254 // It is analog of PostStepDoIt in terms of secondary electron. 241 // 255 // 242 256 243 void G4PAIModel::SampleSecondaries(std::vector 257 void G4PAIModel::SampleSecondaries(std::vector<G4DynamicParticle*>* vdp, 244 const G4MaterialCutsCouple* matCC, 258 const G4MaterialCutsCouple* matCC, 245 const G4DynamicParticle* dp, 259 const G4DynamicParticle* dp, 246 G4double tmin, 260 G4double tmin, 247 G4double maxEnergy) 261 G4double maxEnergy) 248 { 262 { 249 G4int coupleIndex = FindCoupleIndex(matCC); 263 G4int coupleIndex = FindCoupleIndex(matCC); 250 264 251 //G4cout << "G4PAIModel::SampleSecondaries: 265 //G4cout << "G4PAIModel::SampleSecondaries: coupleIndex= "<<coupleIndex<<G4endl; 252 if(0 > coupleIndex) { return; } 266 if(0 > coupleIndex) { return; } 253 267 254 SetParticle(dp->GetDefinition()); 268 SetParticle(dp->GetDefinition()); 255 G4double kineticEnergy = dp->GetKineticEnerg 269 G4double kineticEnergy = dp->GetKineticEnergy(); 256 270 257 G4double tmax = MaxSecondaryEnergy(fParticle 271 G4double tmax = MaxSecondaryEnergy(fParticle, kineticEnergy); 258 if(maxEnergy < tmax) { tmax = maxEnergy; } 272 if(maxEnergy < tmax) { tmax = maxEnergy; } 259 if(tmin >= tmax) { return; } 273 if(tmin >= tmax) { return; } 260 274 261 G4ThreeVector direction= dp->GetMomentumDire 275 G4ThreeVector direction= dp->GetMomentumDirection(); 262 G4double scaledTkin = kineticEnergy*fRati 276 G4double scaledTkin = kineticEnergy*fRatio; 263 G4double totalEnergy = kineticEnergy + fMa 277 G4double totalEnergy = kineticEnergy + fMass; 264 G4double totalMomentum = sqrt(kineticEnergy* 278 G4double totalMomentum = sqrt(kineticEnergy*(totalEnergy+fMass)); 265 279 266 G4double deltaTkin = 280 G4double deltaTkin = 267 fModelData->SamplePostStepTransfer(coupleI 281 fModelData->SamplePostStepTransfer(coupleIndex, scaledTkin, tmin, tmax); 268 282 269 //G4cout<<"G4PAIModel::SampleSecondaries; de 283 //G4cout<<"G4PAIModel::SampleSecondaries; deltaKIn = "<<deltaTkin/keV 270 // <<" keV "<< " Escaled(MeV)= " << scaledT 284 // <<" keV "<< " Escaled(MeV)= " << scaledTkin << G4endl; 271 285 272 if( !(deltaTkin <= 0.) && !(deltaTkin > 0)) 286 if( !(deltaTkin <= 0.) && !(deltaTkin > 0)) { 273 G4cout<<"G4PAIModel::SampleSecondaries; de 287 G4cout<<"G4PAIModel::SampleSecondaries; deltaKIn = "<<deltaTkin/keV 274 <<" keV "<< " Escaled(MeV)= " << scaledTki 288 <<" keV "<< " Escaled(MeV)= " << scaledTkin << G4endl; 275 return; 289 return; 276 } 290 } 277 if( deltaTkin <= 0.) { return; } 291 if( deltaTkin <= 0.) { return; } 278 292 279 if( deltaTkin > tmax) { deltaTkin = tmax; } 293 if( deltaTkin > tmax) { deltaTkin = tmax; } 280 294 281 const G4Element* anElement = SelectTargetAto << 295 const G4Element* anElement = SelectRandomAtom(matCC,fParticle,kineticEnergy); 282 << 296 G4int Z = G4lrint(anElement->GetZ()); 283 << 284 G4int Z = anElement->GetZasInt(); << 285 297 286 auto deltaRay = new G4DynamicParticle(fElect << 298 G4DynamicParticle* deltaRay = new G4DynamicParticle(fElectron, 287 GetAngularDistribution()->SampleDirectio 299 GetAngularDistribution()->SampleDirection(dp, deltaTkin, 288 Z, matCC->GetMaterial()), 300 Z, matCC->GetMaterial()), 289 deltaTkin); 301 deltaTkin); 290 302 291 // primary change 303 // primary change 292 kineticEnergy -= deltaTkin; 304 kineticEnergy -= deltaTkin; 293 G4ThreeVector dir = totalMomentum*direction 305 G4ThreeVector dir = totalMomentum*direction - deltaRay->GetMomentum(); 294 direction = dir.unit(); 306 direction = dir.unit(); 295 fParticleChange->SetProposedKineticEnergy(ki 307 fParticleChange->SetProposedKineticEnergy(kineticEnergy); 296 fParticleChange->SetProposedMomentumDirectio 308 fParticleChange->SetProposedMomentumDirection(direction); 297 309 298 vdp->push_back(deltaRay); 310 vdp->push_back(deltaRay); 299 } 311 } 300 312 301 ////////////////////////////////////////////// 313 /////////////////////////////////////////////////////////////////////// 302 314 303 G4double G4PAIModel::SampleFluctuations(const << 315 G4double G4PAIModel::SampleFluctuations( const G4MaterialCutsCouple* matCC, 304 const << 316 const G4DynamicParticle* aParticle, 305 const << 317 G4double tmax, G4double step, 306 const G4double, << 318 G4double eloss) 307 const << 308 const G4double eloss) << 309 { 319 { 310 G4int coupleIndex = FindCoupleIndex(matCC); 320 G4int coupleIndex = FindCoupleIndex(matCC); 311 if(0 > coupleIndex) { return eloss; } 321 if(0 > coupleIndex) { return eloss; } 312 322 313 SetParticle(aParticle->GetDefinition()); 323 SetParticle(aParticle->GetDefinition()); 314 324 315 /* 325 /* 316 G4cout << "G4PAIModel::SampleFluctuations st 326 G4cout << "G4PAIModel::SampleFluctuations step(mm)= "<< step/mm 317 << " Eloss(keV)= " << eloss/keV << " in " 327 << " Eloss(keV)= " << eloss/keV << " in " 318 << matCC->Getmaterial()->GetName() << G4end 328 << matCC->Getmaterial()->GetName() << G4endl; 319 */ 329 */ 320 330 321 G4double Tkin = aParticle->GetKineticE 331 G4double Tkin = aParticle->GetKineticEnergy(); 322 G4double scaledTkin = Tkin*fRatio; 332 G4double scaledTkin = Tkin*fRatio; 323 333 324 G4double loss = fModelData->SampleAlongStepT 334 G4double loss = fModelData->SampleAlongStepTransfer(coupleIndex, Tkin, 325 scaledTkin, tcut, << 335 scaledTkin, tmax, 326 step*fChargeSquare); 336 step*fChargeSquare); 327 337 328 // G4cout<<"PAIModel AlongStepLoss = "<<loss 338 // G4cout<<"PAIModel AlongStepLoss = "<<loss/keV<<" keV, on step = " 329 //<<step/mm<<" mm"<<G4endl; 339 //<<step/mm<<" mm"<<G4endl; 330 return loss; 340 return loss; 331 341 332 } 342 } 333 343 334 ////////////////////////////////////////////// 344 ////////////////////////////////////////////////////////////////////// 335 // 345 // 336 // Returns the statistical estimation of the e 346 // Returns the statistical estimation of the energy loss distribution variance 337 // 347 // 338 348 339 349 340 G4double G4PAIModel::Dispersion( const G4Mater 350 G4double G4PAIModel::Dispersion( const G4Material* material, 341 const G4Dynam 351 const G4DynamicParticle* aParticle, 342 const G4double tcut, << 352 G4double tmax, 343 const G4double tmax, << 353 G4double step ) 344 const G4double step ) << 345 { 354 { 346 G4double particleMass = aParticle->GetMass( 355 G4double particleMass = aParticle->GetMass(); 347 G4double electronDensity = material->GetElec 356 G4double electronDensity = material->GetElectronDensity(); 348 G4double kineticEnergy = aParticle->GetKinet 357 G4double kineticEnergy = aParticle->GetKineticEnergy(); 349 G4double q = aParticle->GetCharge()/eplus; 358 G4double q = aParticle->GetCharge()/eplus; 350 G4double etot = kineticEnergy + particleMass 359 G4double etot = kineticEnergy + particleMass; 351 G4double beta2 = kineticEnergy*(kineticEnerg 360 G4double beta2 = kineticEnergy*(kineticEnergy + 2.0*particleMass)/(etot*etot); 352 G4double siga = (tmax/beta2 - 0.5*tcut) * t << 361 G4double siga = (1.0/beta2 - 0.5) * twopi_mc2_rcl2 * tmax * step 353 * electronDensity * q * q; 362 * electronDensity * q * q; 354 363 355 return siga; 364 return siga; 356 } 365 } 357 366 358 ////////////////////////////////////////////// 367 ///////////////////////////////////////////////////////////////////// 359 368 360 G4double G4PAIModel::MaxSecondaryEnergy( const 369 G4double G4PAIModel::MaxSecondaryEnergy( const G4ParticleDefinition* p, 361 G4double kinEnergy) 370 G4double kinEnergy) 362 { 371 { 363 SetParticle(p); 372 SetParticle(p); 364 G4double tmax = kinEnergy; 373 G4double tmax = kinEnergy; 365 if(p == fElectron) { tmax *= 0.5; } 374 if(p == fElectron) { tmax *= 0.5; } 366 else if(p != fPositron) { 375 else if(p != fPositron) { 367 G4double ratio= electron_mass_c2/fMass; 376 G4double ratio= electron_mass_c2/fMass; 368 G4double gamma= kinEnergy/fMass + 1.0; 377 G4double gamma= kinEnergy/fMass + 1.0; 369 tmax = 2.0*electron_mass_c2*(gamma*gamma - 378 tmax = 2.0*electron_mass_c2*(gamma*gamma - 1.) / 370 (1. + 2.0*gamma*ratio + rati 379 (1. + 2.0*gamma*ratio + ratio*ratio); 371 } 380 } 372 return tmax; 381 return tmax; 373 } 382 } 374 383 375 ////////////////////////////////////////////// 384 /////////////////////////////////////////////////////////////// 376 385 377 void G4PAIModel::DefineForRegion(const G4Regio 386 void G4PAIModel::DefineForRegion(const G4Region* r) 378 { 387 { 379 fPAIRegionVector.push_back(r); 388 fPAIRegionVector.push_back(r); 380 } 389 } 381 390 382 ////////////////////////////////////////////// 391 /////////////////////////////////////////////////////////////// 383 392 384 393