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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: G4LowEnergyBremsstrahlung.cc 107396 2017-11-10 08:28:08Z gcosmo $ >> 27 // GEANT4 tag $Name: geant4-09-01-ref-00 $ 26 // 28 // 27 // ------------------------------------------- 29 // -------------------------------------------------------------- 28 // 30 // 29 // File name: G4LowEnergyBremsstrahlung 31 // File name: G4LowEnergyBremsstrahlung 30 // 32 // 31 // Author: Alessandra Forti, Vladimir I 33 // Author: Alessandra Forti, Vladimir Ivanchenko 32 // 34 // 33 // Creation date: March 1999 35 // Creation date: March 1999 34 // 36 // 35 // Modifications: 37 // Modifications: 36 // 18.04.2000 V.L. 38 // 18.04.2000 V.L. 37 // - First implementation of continuous energ 39 // - First implementation of continuous energy loss. 38 // 17.02.2000 Veronique Lefebure 40 // 17.02.2000 Veronique Lefebure 39 // - correct bug : the gamma energy was not d 41 // - correct bug : the gamma energy was not deposited when the gamma was 40 // not produced when its energy was < cutFo 42 // not produced when its energy was < cutForLowEnergySecondaryPhotons 41 // 43 // 42 // Added Livermore data table construction met 44 // Added Livermore data table construction methods A. Forti 43 // Modified BuildMeanFreePath to read new data 45 // Modified BuildMeanFreePath to read new data tables A. Forti 44 // Modified PostStepDoIt to insert sampling wi 46 // Modified PostStepDoIt to insert sampling with with EEDL data A. Forti 45 // Added SelectRandomAtom A. Forti 47 // Added SelectRandomAtom A. Forti 46 // Added map of the elements A. Forti 48 // Added map of the elements A. Forti 47 // 20.09.00 update printout V.Ivanchenko 49 // 20.09.00 update printout V.Ivanchenko 48 // 24.04.01 V.Ivanchenko remove RogueWave 50 // 24.04.01 V.Ivanchenko remove RogueWave 49 // 29.09.2001 V.Ivanchenko: major revision bas 51 // 29.09.2001 V.Ivanchenko: major revision based on design iteration 50 // 10.10.2001 MGP Revision to improve code qua 52 // 10.10.2001 MGP Revision to improve code quality and consistency with design 51 // 18.10.2001 MGP Revision to improve code qua 53 // 18.10.2001 MGP Revision to improve code quality 52 // 28.10.2001 VI Update printout 54 // 28.10.2001 VI Update printout 53 // 29.11.2001 VI New parametrisation 55 // 29.11.2001 VI New parametrisation 54 // 30.07.2002 VI Fix in restricted energy los 56 // 30.07.2002 VI Fix in restricted energy loss 55 // 21.01.2003 VI Cut per region 57 // 21.01.2003 VI Cut per region 56 // 21.02.2003 V.Ivanchenko Energy bins for 58 // 21.02.2003 V.Ivanchenko Energy bins for spectrum are defined here 57 // 28.02.03 V.Ivanchenko Filename is define 59 // 28.02.03 V.Ivanchenko Filename is defined in the constructor 58 // 24.03.2003 P.Rodrigues Changes to accommoda 60 // 24.03.2003 P.Rodrigues Changes to accommodate new angular generators 59 // 20.05.2003 MGP Removed memory leak related 61 // 20.05.2003 MGP Removed memory leak related to angularDistribution 60 // 06.11.2003 MGP Improved user interface to 62 // 06.11.2003 MGP Improved user interface to select angular distribution model 61 // 63 // 62 // ------------------------------------------- 64 // -------------------------------------------------------------- 63 65 64 #include "G4LowEnergyBremsstrahlung.hh" 66 #include "G4LowEnergyBremsstrahlung.hh" 65 #include "G4RDeBremsstrahlungSpectrum.hh" 67 #include "G4RDeBremsstrahlungSpectrum.hh" 66 #include "G4RDBremsstrahlungCrossSectionHandle 68 #include "G4RDBremsstrahlungCrossSectionHandler.hh" 67 #include "G4RDVBremAngularDistribution.hh" 69 #include "G4RDVBremAngularDistribution.hh" 68 #include "G4RDModifiedTsai.hh" 70 #include "G4RDModifiedTsai.hh" 69 #include "G4RDGenerator2BS.hh" 71 #include "G4RDGenerator2BS.hh" 70 #include "G4RDGenerator2BN.hh" 72 #include "G4RDGenerator2BN.hh" 71 #include "G4RDVDataSetAlgorithm.hh" 73 #include "G4RDVDataSetAlgorithm.hh" 72 #include "G4RDLogLogInterpolation.hh" 74 #include "G4RDLogLogInterpolation.hh" 73 #include "G4RDVEMDataSet.hh" 75 #include "G4RDVEMDataSet.hh" 74 #include "G4EnergyLossTables.hh" 76 #include "G4EnergyLossTables.hh" 75 #include "G4PhysicalConstants.hh" 77 #include "G4PhysicalConstants.hh" 76 #include "G4SystemOfUnits.hh" 78 #include "G4SystemOfUnits.hh" 77 #include "G4UnitsTable.hh" 79 #include "G4UnitsTable.hh" 78 #include "G4Electron.hh" 80 #include "G4Electron.hh" 79 #include "G4Gamma.hh" 81 #include "G4Gamma.hh" 80 #include "G4ProductionCutsTable.hh" 82 #include "G4ProductionCutsTable.hh" 81 83 82 84 83 G4LowEnergyBremsstrahlung::G4LowEnergyBremsstr 85 G4LowEnergyBremsstrahlung::G4LowEnergyBremsstrahlung(const G4String& nam) 84 : G4eLowEnergyLoss(nam), 86 : G4eLowEnergyLoss(nam), 85 crossSectionHandler(0), 87 crossSectionHandler(0), 86 theMeanFreePath(0), 88 theMeanFreePath(0), 87 energySpectrum(0) 89 energySpectrum(0) 88 { 90 { 89 cutForPhotons = 0.; 91 cutForPhotons = 0.; 90 verboseLevel = 0; 92 verboseLevel = 0; 91 generatorName = "tsai"; 93 generatorName = "tsai"; 92 angularDistribution = new G4RDModifiedTsai(" 94 angularDistribution = new G4RDModifiedTsai("TsaiGenerator"); // default generator 93 // angularDistribution->PrintGeneratorInforma 95 // angularDistribution->PrintGeneratorInformation(); 94 TsaiAngularDistribution = new G4RDModifiedTs 96 TsaiAngularDistribution = new G4RDModifiedTsai("TsaiGenerator"); 95 } 97 } 96 98 97 /* 99 /* 98 G4LowEnergyBremsstrahlung::G4LowEnergyBremsstr 100 G4LowEnergyBremsstrahlung::G4LowEnergyBremsstrahlung(const G4String& nam, G4RDVBremAngularDistribution* distribution) 99 : G4eLowEnergyLoss(nam), 101 : G4eLowEnergyLoss(nam), 100 crossSectionHandler(0), 102 crossSectionHandler(0), 101 theMeanFreePath(0), 103 theMeanFreePath(0), 102 energySpectrum(0), 104 energySpectrum(0), 103 angularDistribution(distribution) 105 angularDistribution(distribution) 104 { 106 { 105 cutForPhotons = 0.; 107 cutForPhotons = 0.; 106 verboseLevel = 0; 108 verboseLevel = 0; 107 109 108 angularDistribution->PrintGeneratorInformati 110 angularDistribution->PrintGeneratorInformation(); 109 111 110 TsaiAngularDistribution = new G4RDModifiedTs 112 TsaiAngularDistribution = new G4RDModifiedTsai("TsaiGenerator"); 111 } 113 } 112 */ 114 */ 113 115 114 G4LowEnergyBremsstrahlung::~G4LowEnergyBremsst 116 G4LowEnergyBremsstrahlung::~G4LowEnergyBremsstrahlung() 115 { 117 { 116 if(crossSectionHandler) delete crossSectionH 118 if(crossSectionHandler) delete crossSectionHandler; 117 if(energySpectrum) delete energySpectrum; 119 if(energySpectrum) delete energySpectrum; 118 if(theMeanFreePath) delete theMeanFreePath; 120 if(theMeanFreePath) delete theMeanFreePath; 119 delete angularDistribution; 121 delete angularDistribution; 120 delete TsaiAngularDistribution; 122 delete TsaiAngularDistribution; 121 energyBins.clear(); 123 energyBins.clear(); 122 } 124 } 123 125 124 126 125 void G4LowEnergyBremsstrahlung::BuildPhysicsTa 127 void G4LowEnergyBremsstrahlung::BuildPhysicsTable(const G4ParticleDefinition& aParticleType) 126 { 128 { 127 if(verboseLevel > 0) { 129 if(verboseLevel > 0) { 128 G4cout << "G4LowEnergyBremsstrahlung::Buil 130 G4cout << "G4LowEnergyBremsstrahlung::BuildPhysicsTable start" 129 << G4endl; 131 << G4endl; 130 } 132 } 131 133 132 cutForSecondaryPhotons.clear(); 134 cutForSecondaryPhotons.clear(); 133 135 134 // Create and fill BremsstrahlungParameters 136 // Create and fill BremsstrahlungParameters once 135 if( energySpectrum != 0 ) delete energySpect 137 if( energySpectrum != 0 ) delete energySpectrum; 136 energyBins.clear(); 138 energyBins.clear(); 137 for(size_t i=0; i<15; i++) { 139 for(size_t i=0; i<15; i++) { 138 G4double x = 0.1*((G4double)i); 140 G4double x = 0.1*((G4double)i); 139 if(i == 0) x = 0.01; 141 if(i == 0) x = 0.01; 140 if(i == 10) x = 0.95; 142 if(i == 10) x = 0.95; 141 if(i == 11) x = 0.97; 143 if(i == 11) x = 0.97; 142 if(i == 12) x = 0.99; 144 if(i == 12) x = 0.99; 143 if(i == 13) x = 0.995; 145 if(i == 13) x = 0.995; 144 if(i == 14) x = 1.0; 146 if(i == 14) x = 1.0; 145 energyBins.push_back(x); 147 energyBins.push_back(x); 146 } 148 } 147 const G4String dataName("/brem/br-sp.dat"); 149 const G4String dataName("/brem/br-sp.dat"); 148 energySpectrum = new G4RDeBremsstrahlungSpec 150 energySpectrum = new G4RDeBremsstrahlungSpectrum(energyBins,dataName); 149 151 150 if(verboseLevel > 0) { 152 if(verboseLevel > 0) { 151 G4cout << "G4LowEnergyBremsstrahlungSpectr 153 G4cout << "G4LowEnergyBremsstrahlungSpectrum is initialized" 152 << G4endl; 154 << G4endl; 153 } 155 } 154 156 155 // Create and fill G4RDCrossSectionHandler o 157 // Create and fill G4RDCrossSectionHandler once 156 158 157 if( crossSectionHandler != 0 ) delete crossS 159 if( crossSectionHandler != 0 ) delete crossSectionHandler; 158 G4RDVDataSetAlgorithm* interpolation = new G 160 G4RDVDataSetAlgorithm* interpolation = new G4RDLogLogInterpolation(); 159 G4double lowKineticEnergy = GetLowerBoundEl 161 G4double lowKineticEnergy = GetLowerBoundEloss(); 160 G4double highKineticEnergy = GetUpperBoundEl 162 G4double highKineticEnergy = GetUpperBoundEloss(); 161 G4int totBin = GetNbinEloss(); 163 G4int totBin = GetNbinEloss(); 162 crossSectionHandler = new G4RDBremsstrahlung 164 crossSectionHandler = new G4RDBremsstrahlungCrossSectionHandler(energySpectrum, interpolation); 163 crossSectionHandler->Initialise(0,lowKinetic 165 crossSectionHandler->Initialise(0,lowKineticEnergy, highKineticEnergy, totBin); 164 crossSectionHandler->LoadShellData("brem/br- 166 crossSectionHandler->LoadShellData("brem/br-cs-"); 165 167 166 if (verboseLevel > 0) { 168 if (verboseLevel > 0) { 167 G4cout << GetProcessName() 169 G4cout << GetProcessName() 168 << " is created; Cross section data 170 << " is created; Cross section data: " 169 << G4endl; 171 << G4endl; 170 crossSectionHandler->PrintData(); 172 crossSectionHandler->PrintData(); 171 G4cout << "Parameters: " 173 G4cout << "Parameters: " 172 << G4endl; 174 << G4endl; 173 energySpectrum->PrintData(); 175 energySpectrum->PrintData(); 174 } 176 } 175 177 176 // Build loss table for Bremsstrahlung 178 // Build loss table for Bremsstrahlung 177 179 178 BuildLossTable(aParticleType); 180 BuildLossTable(aParticleType); 179 181 180 if(verboseLevel > 0) { 182 if(verboseLevel > 0) { 181 G4cout << "The loss table is built" 183 G4cout << "The loss table is built" 182 << G4endl; 184 << G4endl; 183 } 185 } 184 186 185 if (&aParticleType==G4Electron::Electron()) 187 if (&aParticleType==G4Electron::Electron()) { 186 188 187 RecorderOfElectronProcess[CounterOfElectro 189 RecorderOfElectronProcess[CounterOfElectronProcess] = (*this).theLossTable; 188 CounterOfElectronProcess++; 190 CounterOfElectronProcess++; 189 PrintInfoDefinition(); 191 PrintInfoDefinition(); 190 192 191 } else { 193 } else { 192 194 193 RecorderOfPositronProcess[CounterOfPositro 195 RecorderOfPositronProcess[CounterOfPositronProcess] = (*this).theLossTable; 194 CounterOfPositronProcess++; 196 CounterOfPositronProcess++; 195 } 197 } 196 198 197 // Build mean free path data using cut value 199 // Build mean free path data using cut values 198 200 199 if( theMeanFreePath != 0 ) delete theMeanFre 201 if( theMeanFreePath != 0 ) delete theMeanFreePath; 200 theMeanFreePath = crossSectionHandler-> 202 theMeanFreePath = crossSectionHandler-> 201 BuildMeanFreePathForMateri 203 BuildMeanFreePathForMaterials(&cutForSecondaryPhotons); 202 204 203 if(verboseLevel > 0) { 205 if(verboseLevel > 0) { 204 G4cout << "The MeanFreePath table is built 206 G4cout << "The MeanFreePath table is built" 205 << G4endl; 207 << G4endl; 206 } 208 } 207 209 208 // Build common DEDX table for all ionisatio 210 // Build common DEDX table for all ionisation processes 209 211 210 BuildDEDXTable(aParticleType); 212 BuildDEDXTable(aParticleType); 211 213 212 if(verboseLevel > 0) { 214 if(verboseLevel > 0) { 213 G4cout << "G4LowEnergyBremsstrahlung::Buil 215 G4cout << "G4LowEnergyBremsstrahlung::BuildPhysicsTable end" 214 << G4endl; 216 << G4endl; 215 } 217 } 216 218 217 } 219 } 218 220 219 221 220 void G4LowEnergyBremsstrahlung::BuildLossTable 222 void G4LowEnergyBremsstrahlung::BuildLossTable(const G4ParticleDefinition& ) 221 { 223 { 222 // Build table for energy loss due to soft b 224 // Build table for energy loss due to soft brems 223 // the tables are built for *MATERIALS* binn 225 // the tables are built for *MATERIALS* binning is taken from LowEnergyLoss 224 226 225 G4double lowKineticEnergy = GetLowerBoundEl 227 G4double lowKineticEnergy = GetLowerBoundEloss(); 226 G4double highKineticEnergy = GetUpperBoundEl 228 G4double highKineticEnergy = GetUpperBoundEloss(); 227 size_t totBin = GetNbinEloss(); 229 size_t totBin = GetNbinEloss(); 228 230 229 // create table 231 // create table 230 232 231 if (theLossTable) { 233 if (theLossTable) { 232 theLossTable->clearAndDestroy(); 234 theLossTable->clearAndDestroy(); 233 delete theLossTable; 235 delete theLossTable; 234 } 236 } 235 const G4ProductionCutsTable* theCoupleTable= 237 const G4ProductionCutsTable* theCoupleTable= 236 G4ProductionCutsTable::GetProductionCu 238 G4ProductionCutsTable::GetProductionCutsTable(); 237 size_t numOfCouples = theCoupleTable->GetTab 239 size_t numOfCouples = theCoupleTable->GetTableSize(); 238 theLossTable = new G4PhysicsTable(numOfCoupl 240 theLossTable = new G4PhysicsTable(numOfCouples); 239 241 240 // Clean up the vector of cuts 242 // Clean up the vector of cuts 241 cutForSecondaryPhotons.clear(); 243 cutForSecondaryPhotons.clear(); 242 244 243 // Loop for materials 245 // Loop for materials 244 246 245 for (size_t j=0; j<numOfCouples; j++) { 247 for (size_t j=0; j<numOfCouples; j++) { 246 248 247 // create physics vector and fill it 249 // create physics vector and fill it 248 G4PhysicsLogVector* aVector = new G4Physic 250 G4PhysicsLogVector* aVector = new G4PhysicsLogVector(lowKineticEnergy, 249 highKineticEnergy, 251 highKineticEnergy, 250 totBin); 252 totBin); 251 253 252 // get material parameters needed for the 254 // get material parameters needed for the energy loss calculation 253 const G4MaterialCutsCouple* couple = theCo 255 const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(j); 254 const G4Material* material= couple->GetMat 256 const G4Material* material= couple->GetMaterial(); 255 257 256 // the cut cannot be below lowest limit 258 // the cut cannot be below lowest limit 257 G4double tCut = (*(theCoupleTable->GetEner 259 G4double tCut = (*(theCoupleTable->GetEnergyCutsVector(0)))[j]; 258 tCut = std::min(highKineticEnergy, tCut); 260 tCut = std::min(highKineticEnergy, tCut); 259 cutForSecondaryPhotons.push_back(tCut); 261 cutForSecondaryPhotons.push_back(tCut); 260 262 261 const G4ElementVector* theElementVector = 263 const G4ElementVector* theElementVector = material->GetElementVector(); 262 size_t NumberOfElements = material->GetNum 264 size_t NumberOfElements = material->GetNumberOfElements() ; 263 const G4double* theAtomicNumDensityVector 265 const G4double* theAtomicNumDensityVector = 264 material->GetAtomicNumDensityVector(); 266 material->GetAtomicNumDensityVector(); 265 if(verboseLevel > 1) { 267 if(verboseLevel > 1) { 266 G4cout << "Energy loss for material # " 268 G4cout << "Energy loss for material # " << j 267 << " tCut(keV)= " << tCut/keV 269 << " tCut(keV)= " << tCut/keV 268 << G4endl; 270 << G4endl; 269 } 271 } 270 272 271 // now comes the loop for the kinetic ener 273 // now comes the loop for the kinetic energy values 272 for (size_t i = 0; i<totBin; i++) { 274 for (size_t i = 0; i<totBin; i++) { 273 275 274 G4double lowEdgeEnergy = aVector->GetLow 276 G4double lowEdgeEnergy = aVector->GetLowEdgeEnergy(i); 275 G4double ionloss = 0.; 277 G4double ionloss = 0.; 276 278 277 // loop for elements in the material 279 // loop for elements in the material 278 for (size_t iel=0; iel<NumberOfElements; 280 for (size_t iel=0; iel<NumberOfElements; iel++ ) { 279 G4int Z = (G4int)((*theElementVector)[ 281 G4int Z = (G4int)((*theElementVector)[iel]->GetZ()); 280 G4double e = energySpectrum->AverageEn 282 G4double e = energySpectrum->AverageEnergy(Z, 0.0, tCut, lowEdgeEnergy); 281 G4double cs= crossSectionHandler->Find 283 G4double cs= crossSectionHandler->FindValue(Z, lowEdgeEnergy); 282 ionloss += e * cs * theAtomicNumDen 284 ionloss += e * cs * theAtomicNumDensityVector[iel]; 283 if(verboseLevel > 1) { 285 if(verboseLevel > 1) { 284 G4cout << "Z= " << Z 286 G4cout << "Z= " << Z 285 << "; tCut(keV)= " << tCut/ke 287 << "; tCut(keV)= " << tCut/keV 286 << "; E(keV)= " << lowEdgeEne 288 << "; E(keV)= " << lowEdgeEnergy/keV 287 << "; Eav(keV)= " << e/keV 289 << "; Eav(keV)= " << e/keV 288 << "; cs= " << cs 290 << "; cs= " << cs 289 << "; loss= " << ionloss 291 << "; loss= " << ionloss 290 << G4endl; 292 << G4endl; 291 } 293 } 292 } 294 } 293 aVector->PutValue(i,ionloss); 295 aVector->PutValue(i,ionloss); 294 } 296 } 295 theLossTable->insert(aVector); 297 theLossTable->insert(aVector); 296 } 298 } 297 } 299 } 298 300 299 301 300 G4VParticleChange* G4LowEnergyBremsstrahlung:: 302 G4VParticleChange* G4LowEnergyBremsstrahlung::PostStepDoIt(const G4Track& track, 301 const G4Step& step) 303 const G4Step& step) 302 { 304 { 303 aParticleChange.Initialize(track); 305 aParticleChange.Initialize(track); 304 306 305 const G4MaterialCutsCouple* couple = track.G 307 const G4MaterialCutsCouple* couple = track.GetMaterialCutsCouple(); 306 G4double kineticEnergy = track.GetKineticEne 308 G4double kineticEnergy = track.GetKineticEnergy(); 307 G4int index = couple->GetIndex(); 309 G4int index = couple->GetIndex(); 308 G4double tCut = cutForSecondaryPhotons[index 310 G4double tCut = cutForSecondaryPhotons[index]; 309 311 310 // Control limits 312 // Control limits 311 if(tCut >= kineticEnergy) 313 if(tCut >= kineticEnergy) 312 return G4VContinuousDiscreteProcess::Post 314 return G4VContinuousDiscreteProcess::PostStepDoIt(track, step); 313 315 314 G4int Z = crossSectionHandler->SelectRandomA 316 G4int Z = crossSectionHandler->SelectRandomAtom(couple, kineticEnergy); 315 317 316 G4double tGamma = energySpectrum->SampleEner 318 G4double tGamma = energySpectrum->SampleEnergy(Z, tCut, kineticEnergy, kineticEnergy); 317 G4double totalEnergy = kineticEnergy + elect 319 G4double totalEnergy = kineticEnergy + electron_mass_c2; 318 G4double finalEnergy = kineticEnergy - tGamm 320 G4double finalEnergy = kineticEnergy - tGamma; // electron/positron final energy 319 G4double theta = 0; 321 G4double theta = 0; 320 322 321 if((kineticEnergy < 1*MeV && kineticEnergy > 323 if((kineticEnergy < 1*MeV && kineticEnergy > 1*keV && generatorName == "2bn")){ 322 theta = angularDistribution->PolarAngle( 324 theta = angularDistribution->PolarAngle(kineticEnergy,finalEnergy,Z); 323 }else{ 325 }else{ 324 theta = TsaiAngularDistribution->PolarAn 326 theta = TsaiAngularDistribution->PolarAngle(kineticEnergy,finalEnergy,Z); 325 } 327 } 326 328 327 G4double phi = twopi * G4UniformRand(); 329 G4double phi = twopi * G4UniformRand(); 328 G4double dirZ = std::cos(theta); 330 G4double dirZ = std::cos(theta); 329 G4double sinTheta = std::sqrt(1. - dirZ*dir 331 G4double sinTheta = std::sqrt(1. - dirZ*dirZ); 330 G4double dirX = sinTheta*std::cos(phi); 332 G4double dirX = sinTheta*std::cos(phi); 331 G4double dirY = sinTheta*std::sin(phi); 333 G4double dirY = sinTheta*std::sin(phi); 332 334 333 G4ThreeVector gammaDirection (dirX, dirY, di 335 G4ThreeVector gammaDirection (dirX, dirY, dirZ); 334 G4ThreeVector electronDirection = track.GetM 336 G4ThreeVector electronDirection = track.GetMomentumDirection(); 335 337 336 // 338 // 337 // Update the incident particle 339 // Update the incident particle 338 // 340 // 339 gammaDirection.rotateUz(electronDirection); 341 gammaDirection.rotateUz(electronDirection); 340 342 341 // Kinematic problem 343 // Kinematic problem 342 if (finalEnergy < 0.) { 344 if (finalEnergy < 0.) { 343 tGamma += finalEnergy; 345 tGamma += finalEnergy; 344 finalEnergy = 0.0; 346 finalEnergy = 0.0; 345 } 347 } 346 348 347 G4double momentum = std::sqrt((totalEnergy + 349 G4double momentum = std::sqrt((totalEnergy + electron_mass_c2)*kineticEnergy); 348 350 349 G4double finalX = momentum*electronDirection 351 G4double finalX = momentum*electronDirection.x() - tGamma*gammaDirection.x(); 350 G4double finalY = momentum*electronDirection 352 G4double finalY = momentum*electronDirection.y() - tGamma*gammaDirection.y(); 351 G4double finalZ = momentum*electronDirection 353 G4double finalZ = momentum*electronDirection.z() - tGamma*gammaDirection.z(); 352 354 353 aParticleChange.SetNumberOfSecondaries(1); 355 aParticleChange.SetNumberOfSecondaries(1); 354 G4double norm = 1./std::sqrt(finalX*finalX + 356 G4double norm = 1./std::sqrt(finalX*finalX + finalY*finalY + finalZ*finalZ); 355 aParticleChange.ProposeMomentumDirection(fin 357 aParticleChange.ProposeMomentumDirection(finalX*norm, finalY*norm, finalZ*norm); 356 aParticleChange.ProposeEnergy( finalEnergy ) 358 aParticleChange.ProposeEnergy( finalEnergy ); 357 359 358 // create G4DynamicParticle object for the g 360 // create G4DynamicParticle object for the gamma 359 G4DynamicParticle* aGamma= new G4DynamicPart 361 G4DynamicParticle* aGamma= new G4DynamicParticle (G4Gamma::Gamma(), 360 gammaDirection, tGamma); 362 gammaDirection, tGamma); 361 aParticleChange.AddSecondary(aGamma); 363 aParticleChange.AddSecondary(aGamma); 362 364 363 return G4VContinuousDiscreteProcess::PostSte 365 return G4VContinuousDiscreteProcess::PostStepDoIt(track, step); 364 } 366 } 365 367 366 368 367 void G4LowEnergyBremsstrahlung::PrintInfoDefin 369 void G4LowEnergyBremsstrahlung::PrintInfoDefinition() 368 { 370 { 369 G4String comments = "Total cross sections fr 371 G4String comments = "Total cross sections from EEDL database."; 370 comments += "\n Gamma energy sampled fr 372 comments += "\n Gamma energy sampled from a parameterised formula."; 371 comments += "\n Implementation of the c 373 comments += "\n Implementation of the continuous dE/dx part."; 372 comments += "\n At present it can be us 374 comments += "\n At present it can be used for electrons "; 373 comments += "in the energy range [250eV,100G 375 comments += "in the energy range [250eV,100GeV]."; 374 comments += "\n The process must work w 376 comments += "\n The process must work with G4LowEnergyIonisation."; 375 377 376 G4cout << G4endl << GetProcessName() << ": 378 G4cout << G4endl << GetProcessName() << ": " << comments << G4endl; 377 } 379 } 378 380 379 G4bool G4LowEnergyBremsstrahlung::IsApplicable 381 G4bool G4LowEnergyBremsstrahlung::IsApplicable(const G4ParticleDefinition& particle) 380 { 382 { 381 return ( (&particle == G4Electron::Electron 383 return ( (&particle == G4Electron::Electron()) ); 382 } 384 } 383 385 384 386 385 G4double G4LowEnergyBremsstrahlung::GetMeanFre 387 G4double G4LowEnergyBremsstrahlung::GetMeanFreePath(const G4Track& track, 386 G4double, 388 G4double, 387 G4ForceCondition* cond) 389 G4ForceCondition* cond) 388 { 390 { 389 *cond = NotForced; 391 *cond = NotForced; 390 G4int index = (track.GetMaterialCutsCouple() 392 G4int index = (track.GetMaterialCutsCouple())->GetIndex(); 391 const G4RDVEMDataSet* data = theMeanFreePath 393 const G4RDVEMDataSet* data = theMeanFreePath->GetComponent(index); 392 G4double meanFreePath = data->FindValue(trac 394 G4double meanFreePath = data->FindValue(track.GetKineticEnergy()); 393 return meanFreePath; 395 return meanFreePath; 394 } 396 } 395 397 396 void G4LowEnergyBremsstrahlung::SetCutForLowEn 398 void G4LowEnergyBremsstrahlung::SetCutForLowEnSecPhotons(G4double cut) 397 { 399 { 398 cutForPhotons = cut; 400 cutForPhotons = cut; 399 } 401 } 400 402 401 void G4LowEnergyBremsstrahlung::SetAngularGene 403 void G4LowEnergyBremsstrahlung::SetAngularGenerator(G4RDVBremAngularDistribution* distribution) 402 { 404 { 403 angularDistribution = distribution; 405 angularDistribution = distribution; 404 angularDistribution->PrintGeneratorInformati 406 angularDistribution->PrintGeneratorInformation(); 405 } 407 } 406 408 407 void G4LowEnergyBremsstrahlung::SetAngularGene 409 void G4LowEnergyBremsstrahlung::SetAngularGenerator(const G4String& name) 408 { 410 { 409 if (name == "tsai") 411 if (name == "tsai") 410 { 412 { 411 delete angularDistribution; 413 delete angularDistribution; 412 angularDistribution = new G4RDModifiedTs 414 angularDistribution = new G4RDModifiedTsai("TsaiGenerator"); 413 generatorName = name; 415 generatorName = name; 414 } 416 } 415 else if (name == "2bn") 417 else if (name == "2bn") 416 { 418 { 417 delete angularDistribution; 419 delete angularDistribution; 418 angularDistribution = new G4RDGenerator2 420 angularDistribution = new G4RDGenerator2BN("2BNGenerator"); 419 generatorName = name; 421 generatorName = name; 420 } 422 } 421 else if (name == "2bs") 423 else if (name == "2bs") 422 { 424 { 423 delete angularDistribution; 425 delete angularDistribution; 424 angularDistribution = new G4RDGenerator 426 angularDistribution = new G4RDGenerator2BS("2BSGenerator"); 425 generatorName = name; 427 generatorName = name; 426 } 428 } 427 else 429 else 428 { 430 { 429 G4Exception("G4LowEnergyBremsstrahlung:: 431 G4Exception("G4LowEnergyBremsstrahlung::SetAngularGenerator()", 430 "InvalidSetup", FatalExcepti 432 "InvalidSetup", FatalException, "Generator does not exist!"); 431 } 433 } 432 434 433 angularDistribution->PrintGeneratorInformati 435 angularDistribution->PrintGeneratorInformation(); 434 } 436 } 435 437 436 438