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26 // 23 //
27 // ------------------------------------------- << 24 // $Id: G4MuPairProduction.cc,v 1.33 2003/04/29 04:58:33 kurasige Exp $
28 // << 25 // GEANT4 tag $Name: geant4-05-01 $
29 // GEANT4 Class file <<
30 // <<
31 // <<
32 // File name: G4MuPairProduction <<
33 // <<
34 // Author: Laszlo Urban <<
35 // <<
36 // Creation date: 30.05.1998 <<
37 // <<
38 // Modifications: <<
39 // 26 //
>> 27 //--------------- G4MuPairProduction physics process ---------------------------
>> 28 // by Laszlo Urban, May 1998
>> 29 //------------------------------------------------------------------------------
40 // 04-06-98 in DoIt,secondary production condi 30 // 04-06-98 in DoIt,secondary production condition:
41 // range>std::min(threshold,safety) << 31 // range>G4std::min(threshold,safety)
42 // 26-10-98 new stuff from R. Kokoulin + clean << 32 // 26/10/98 new stuff from R. Kokoulin + cleanup , L.Urban
43 // 06-05-99 bug fixed , L.Urban << 33 // 06/05/99 bug fixed , L.Urban
44 // 10-02-00 modifications+bug fix , new e.m. s << 34 // 10/02/00 modifications+bug fix , new e.m. structure, L.Urban
45 // 29-05-01 V.Ivanchenko minor changes to prov << 35 // 29/05/01 V.Ivanchenko minor changes to provide ANSI -wall compilation
46 // 10-08-01 new methods Store/Retrieve Physics 36 // 10-08-01 new methods Store/Retrieve PhysicsTable (mma)
47 // 17-09-01 migration of Materials to pure STL 37 // 17-09-01 migration of Materials to pure STL (mma)
48 // 20-09-01 (L.Urban) in ComputeMicroscopicCro 38 // 20-09-01 (L.Urban) in ComputeMicroscopicCrossSection, remove:
49 // if(MaxPairEnergy<CutInPairEnergy) 39 // if(MaxPairEnergy<CutInPairEnergy) MaxPairEnergy=CutInPairEnergy
50 // 26-09-01 completion of store/retrieve Physi 40 // 26-09-01 completion of store/retrieve PhysicsTable
51 // 28-09-01 suppression of theMuonPlus ..etc.. 41 // 28-09-01 suppression of theMuonPlus ..etc..data members (mma)
52 // 29-10-01 all static functions no more inlin 42 // 29-10-01 all static functions no more inlined (mma)
53 // 07-11-01 particleMass becomes a local varia 43 // 07-11-01 particleMass becomes a local variable (mma)
54 // 19-08-02 V.Ivanchenko update to new design << 44 // 08-01-03 DoIt: no more 'tracking cut' for the muon (mma)
55 // 23-12-02 Change interface in order to move << 45 // 16-01-03 Migrade to cut per region (V.Ivanchenko)
56 // 26-12-02 Secondary production moved to deri << 46 // 26-04-03 fix problems of retrieve tables (V.Ivanchenko)
57 // 13-02-03 SubCutoff regime is assigned to a << 47 //------------------------------------------------------------------------------
58 // 08-08-03 STD substitute standard (V.Ivanch <<
59 // 27-09-03 e+ set to be a secondary particle <<
60 // 12-11-03 G4EnergyLossSTD -> G4EnergyLossPro <<
61 // 10-02-04 Add lowestKinEnergy (V.Ivanchenko) <<
62 // 17-08-04 Utilise mu+ tables for mu- (V.Ivan <<
63 // 08-11-04 Migration to new interface of Stor <<
64 // 08-04-05 Major optimisation of internal int <<
65 // <<
66 // ------------------------------------------- <<
67 // <<
68 //....oooOO0OOooo........oooOO0OOooo........oo <<
69 //....oooOO0OOooo........oooOO0OOooo........oo <<
70 48
71 #include "G4MuPairProduction.hh" 49 #include "G4MuPairProduction.hh"
72 #include "G4SystemOfUnits.hh" << 50 #include "G4EnergyLossTables.hh"
73 #include "G4Positron.hh" << 51 #include "G4UnitsTable.hh"
74 #include "G4VEmModel.hh" << 52 #include "G4ProductionCutsTable.hh"
75 #include "G4MuPairProductionModel.hh" << 53
76 #include "G4ElementData.hh" << 54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
77 #include "G4EmParameters.hh" <<
78 55
79 //....oooOO0OOooo........oooOO0OOooo........oo << 56 // static members
80 57
81 G4MuPairProduction::G4MuPairProduction(const G << 58 G4int G4MuPairProduction::nzdat = 5 ;
82 : G4VEnergyLossProcess(name), << 59 G4double G4MuPairProduction::zdat[]={1.,4.,13.,26.,92.};
83 lowestKinEnergy(0.85*CLHEP::GeV) << 60 G4int G4MuPairProduction::ntdat = 8 ;
>> 61 G4double G4MuPairProduction::tdat[]={1.e3,1.e4,1.e5,1.e6,1.e7,1.e8,1.e9,1.e10};
>> 62 G4int G4MuPairProduction::NBIN = 1000 ; //100 ;
>> 63 G4double G4MuPairProduction::ya[1001];
>> 64 G4double G4MuPairProduction::proba[5][8][1001];
>> 65 G4double G4MuPairProduction::MinPairEnergy = 4.*electron_mass_c2;
>> 66
>> 67 G4double G4MuPairProduction::LowerBoundLambda = 1.*keV;
>> 68 G4double G4MuPairProduction::UpperBoundLambda = 1000000.*TeV;
>> 69 G4int G4MuPairProduction::NbinLambda = 150;
>> 70
>> 71 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 72
>> 73 G4MuPairProduction::G4MuPairProduction(const G4String& processName)
>> 74 : G4VMuEnergyLoss(processName),
>> 75 theMeanFreePathTable(NULL)
>> 76 { }
>> 77
>> 78 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 79
>> 80 G4MuPairProduction::~G4MuPairProduction()
84 { 81 {
85 SetProcessSubType(fPairProdByCharged); << 82 if (theMeanFreePathTable) {
86 SetSecondaryParticle(G4Positron::Positron()) << 83 theMeanFreePathTable->clearAndDestroy();
87 SetIonisation(false); << 84 delete theMeanFreePathTable;
>> 85 }
>> 86
>> 87 PartialSumSigma.clearAndDestroy();
88 } 88 }
89 89
90 //....oooOO0OOooo........oooOO0OOooo........oo << 90 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 91
>> 92 void G4MuPairProduction::SetLowerBoundLambda(G4double val)
>> 93 {LowerBoundLambda = val;}
>> 94
>> 95 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 96
>> 97 void G4MuPairProduction::SetUpperBoundLambda(G4double val)
>> 98 {UpperBoundLambda = val;}
91 99
92 G4bool G4MuPairProduction::IsApplicable(const << 100 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 101
>> 102 void G4MuPairProduction::SetNbinLambda(G4int n)
>> 103 {NbinLambda = n;}
>> 104
>> 105 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 106
>> 107 G4double G4MuPairProduction::GetLowerBoundLambda()
>> 108 { return LowerBoundLambda;}
>> 109
>> 110 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 111
>> 112 G4double G4MuPairProduction::GetUpperBoundLambda()
>> 113 { return UpperBoundLambda;}
>> 114
>> 115 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 116
>> 117 G4int G4MuPairProduction::GetNbinLambda()
>> 118 {return NbinLambda;}
>> 119
>> 120 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 121
>> 122 void G4MuPairProduction::BuildPhysicsTable(
>> 123 const G4ParticleDefinition& aParticleType)
>> 124 // just call BuildLossTable+BuildLambdaTable
93 { 125 {
94 return (p.GetPDGCharge() != 0.0); << 126 if( !CutsWhereModified() && theLossTable) return;
>> 127
>> 128 LowestKineticEnergy = GetLowerBoundEloss() ;
>> 129 HighestKineticEnergy = GetUpperBoundEloss() ;
>> 130 TotBin = GetNbinEloss() ;
>> 131
>> 132 BuildLossTable(aParticleType) ;
>> 133
>> 134 if(&aParticleType==G4MuonMinus::MuonMinus())
>> 135 {
>> 136 RecorderOfmuminusProcess[CounterOfmuminusProcess] = (*this).theLossTable ;
>> 137 CounterOfmuminusProcess++;
>> 138 }
>> 139 else
>> 140 {
>> 141 RecorderOfmuplusProcess[CounterOfmuplusProcess] = (*this).theLossTable ;
>> 142 CounterOfmuplusProcess++;
>> 143 }
>> 144
>> 145 // sampling table should be made only once !
>> 146 if( !theMeanFreePathTable ) MakeSamplingTables(&aParticleType);
>> 147
>> 148 BuildLambdaTable(aParticleType) ;
>> 149
>> 150 G4VMuEnergyLoss::BuildDEDXTable(aParticleType);
>> 151
>> 152 if(&aParticleType==G4MuonPlus::MuonPlus()) PrintInfoDefinition();
95 } 153 }
96 154
97 //....oooOO0OOooo........oooOO0OOooo........oo << 155 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
98 156
99 G4double G4MuPairProduction::MinPrimaryEnergy( << 157 void G4MuPairProduction::BuildLossTable(
100 const G4Material*, << 158 const G4ParticleDefinition& aParticleType)
101 G4double) <<
102 { 159 {
103 return lowestKinEnergy; << 160 G4double KineticEnergy,TotalEnergy,pairloss,Z,
>> 161 loss,natom,eCut,pCut ;
>> 162
>> 163 const G4ProductionCutsTable* theCoupleTable=
>> 164 G4ProductionCutsTable::GetProductionCutsTable();
>> 165 size_t numOfCouples = theCoupleTable->GetTableSize();
>> 166
>> 167 if (theLossTable) {theLossTable->clearAndDestroy(); delete theLossTable;}
>> 168 theLossTable = new G4PhysicsTable(numOfCouples);
>> 169
>> 170 electronEnergyCuts = theCoupleTable->GetEnergyCutsVector(1);
>> 171 positronEnergyCuts = theCoupleTable->GetEnergyCutsVector(2);
>> 172
>> 173 G4double particleMass = aParticleType.GetPDGMass();
>> 174
>> 175 // loop for materials
>> 176 //
>> 177 for (size_t J=0; J<numOfCouples; J++)
>> 178 {
>> 179
>> 180 G4PhysicsLogVector* aVector = new G4PhysicsLogVector(
>> 181 LowestKineticEnergy,HighestKineticEnergy,TotBin);
>> 182
>> 183 const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(J);
>> 184 const G4Material* material= couple->GetMaterial();
>> 185
>> 186 G4double electronCut = (*electronEnergyCuts)[J] ;
>> 187 G4double positronCut = (*positronEnergyCuts)[J] ;
>> 188 const G4ElementVector* theElementVector =
>> 189 material->GetElementVector() ;
>> 190 const G4double* theAtomicNumDensityVector =
>> 191 material->GetAtomicNumDensityVector() ;
>> 192 const G4int NumberOfElements =
>> 193 material->GetNumberOfElements() ;
>> 194
>> 195 for (G4int i=0; i<TotBin; i++)
>> 196 {
>> 197 KineticEnergy = aVector->GetLowEdgeEnergy(i) ;
>> 198 TotalEnergy = KineticEnergy+particleMass ;
>> 199
>> 200 eCut = electronCut;
>> 201 pCut = positronCut;
>> 202
>> 203 if(eCut>KineticEnergy)
>> 204 eCut = KineticEnergy ;
>> 205 if(pCut>KineticEnergy)
>> 206 pCut = KineticEnergy ;
>> 207
>> 208 pairloss = 0.;
>> 209 for (G4int iel=0; iel<NumberOfElements; iel++)
>> 210 {
>> 211 Z=(*theElementVector)[iel]->GetZ();
>> 212 natom = theAtomicNumDensityVector[iel] ;
>> 213 loss = ComputePairLoss(&aParticleType,
>> 214 Z,KineticEnergy,eCut,pCut) ;
>> 215 pairloss += natom*loss ;
>> 216 }
>> 217 if(pairloss<0.)
>> 218 pairloss = 0. ;
>> 219 aVector->PutValue(i,pairloss);
>> 220 }
>> 221
>> 222 theLossTable->insert(aVector);
>> 223 }
>> 224 }
>> 225
>> 226 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 227
>> 228 G4double G4MuPairProduction::ComputePairLoss(
>> 229 const G4ParticleDefinition* ParticleType,
>> 230 G4double AtomicNumber,
>> 231 G4double KineticEnergy,
>> 232 G4double ElectronEnergyCut,
>> 233 G4double PositronEnergyCut)
>> 234 {
>> 235 static const G4double
>> 236 xgi[] ={ 0.0199,0.1017,0.2372,0.4083,0.5917,0.7628,0.8983,0.9801 };
>> 237 static const G4double
>> 238 wgi[] ={ 0.0506,0.1112,0.1569,0.1813,0.1813,0.1569,0.1112,0.0506 };
>> 239 static const G4double ak1=6.9 ;
>> 240 static const G4double ak2=1.0 ;
>> 241 static const G4double sqrte = sqrt(exp(1.)) ;
>> 242 G4double z13 = exp(log(AtomicNumber)/3.) ;
>> 243
>> 244 G4double loss = 0.0 ;
>> 245
>> 246 if ( AtomicNumber < 1. ) return loss;
>> 247
>> 248 G4double CutInPairEnergy = ElectronEnergyCut+PositronEnergyCut
>> 249 +2.*electron_mass_c2 ;
>> 250 if( CutInPairEnergy <= MinPairEnergy ) return loss ;
>> 251
>> 252 G4double particleMass = ParticleType->GetPDGMass();
>> 253 G4double MaxPairEnergy = KineticEnergy+particleMass*(1.-0.75*sqrte*z13) ;
>> 254 if(MaxPairEnergy < MinPairEnergy)
>> 255 MaxPairEnergy = MinPairEnergy ;
>> 256
>> 257 if( CutInPairEnergy >= MaxPairEnergy )
>> 258 CutInPairEnergy = MaxPairEnergy ;
>> 259
>> 260 if(CutInPairEnergy <= MinPairEnergy) return loss ;
>> 261
>> 262 G4double aaa,bbb,hhh,x,epln,ep ;
>> 263 G4int kkk ;
>> 264 // calculate the rectricted loss
>> 265 // numerical integration in log(PairEnergy)
>> 266 aaa = log(MinPairEnergy) ;
>> 267 bbb = log(CutInPairEnergy) ;
>> 268 kkk = int((bbb-aaa)/ak1+ak2) ;
>> 269 hhh = (bbb-aaa)/kkk ;
>> 270
>> 271 for (G4int l=0 ; l<kkk; l++)
>> 272 {
>> 273 x = aaa+hhh*l ;
>> 274 for (G4int ll=0; ll<8; ll++)
>> 275 {
>> 276 epln=x+xgi[ll]*hhh ;
>> 277 ep = exp(epln) ;
>> 278 loss += wgi[ll]*ep*ep*ComputeDMicroscopicCrossSection(ParticleType,
>> 279 KineticEnergy,AtomicNumber,
>> 280 ep) ;
>> 281 }
>> 282 }
>> 283 loss *= hhh ;
>> 284 if (loss < 0.) loss = 0.;
>> 285 return loss ;
104 } 286 }
105 287
106 //....oooOO0OOooo........oooOO0OOooo........oo << 288 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
107 289
108 void G4MuPairProduction::InitialiseEnergyLossP << 290 void G4MuPairProduction::BuildLambdaTable(
109 const G4ParticleDefin << 291 const G4ParticleDefinition& ParticleType)
110 const G4ParticleDefinition*) <<
111 { 292 {
112 if (isInitialised) { return; } << 293 G4double LowEdgeEnergy , Value;
113 isInitialised = true; << 294 G4double FixedEnergy = (LowestKineticEnergy + HighestKineticEnergy)/2. ;
114 295
115 theParticle = part; << 296 //create table
>> 297 //
>> 298 const G4ProductionCutsTable* theCoupleTable=
>> 299 G4ProductionCutsTable::GetProductionCutsTable();
>> 300 size_t numOfCouples = theCoupleTable->GetTableSize();
>> 301
>> 302 //create table
>> 303 if (theMeanFreePathTable) {theMeanFreePathTable->clearAndDestroy();
>> 304 delete theMeanFreePathTable;
>> 305 }
>> 306 theMeanFreePathTable = new G4PhysicsTable(numOfCouples);
>> 307
>> 308 PartialSumSigma.clearAndDestroy();
>> 309 PartialSumSigma.resize(numOfCouples);
>> 310
>> 311 G4PhysicsLogVector* ptrVector;
>> 312 for ( size_t J=0; J<numOfCouples; J++ )
>> 313 {
>> 314
>> 315 ptrVector = new G4PhysicsLogVector(
>> 316 LowerBoundLambda,UpperBoundLambda,NbinLambda);
>> 317
>> 318 const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(J);
>> 319
>> 320 for ( G4int i = 0 ; i < NbinLambda ; i++ )
>> 321 {
>> 322 LowEdgeEnergy = ptrVector->GetLowEdgeEnergy( i ) ;
>> 323 Value = ComputeMeanFreePath( &ParticleType, LowEdgeEnergy, couple);
>> 324 ptrVector->PutValue( i , Value ) ;
>> 325 }
>> 326
>> 327 theMeanFreePathTable->insertAt( J , ptrVector );
116 328
117 G4VEmModel* mod = EmModel(0); << 329 // Compute the PartialSumSigma table at a given fixed energy
118 if(nullptr == mod) { << 330 ComputePartialSumSigma( &ParticleType, FixedEnergy, couple) ;
119 lowestKinEnergy = std::max(lowestKinEnergy <<
120 auto ptr = new G4MuPairProductionModel(par <<
121 ptr->SetLowestKineticEnergy(lowestKinEnerg <<
122 mod = ptr; <<
123 SetEmModel(mod); <<
124 } 331 }
>> 332 }
125 333
126 G4VEmFluctuationModel* fm = nullptr; << 334 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
127 G4EmParameters* param = G4EmParameters::Inst << 335
128 mod->SetLowEnergyLimit(param->MinKinEnergy() << 336 void G4MuPairProduction::ComputePartialSumSigma(
129 mod->SetHighEnergyLimit(param->MaxKinEnergy( << 337 const G4ParticleDefinition* ParticleType,
130 mod->SetSecondaryThreshold(param->MuHadBrems << 338 G4double KineticEnergy,
131 AddEmModel(1, mod, fm); << 339 const G4MaterialCutsCouple* couple)
>> 340 {
>> 341 const G4Material* aMaterial = couple->GetMaterial();
>> 342 size_t index = couple->GetIndex();
>> 343 G4int NbOfElements = aMaterial->GetNumberOfElements();
>> 344 const G4ElementVector* theElementVector = aMaterial->GetElementVector();
>> 345 const G4double* theAtomNumDensityVector = aMaterial->
>> 346 GetAtomicNumDensityVector();
>> 347 G4double eCut = (*electronEnergyCuts)[index] ;
>> 348 G4double pCut = (*positronEnergyCuts)[index] ;
>> 349
>> 350 PartialSumSigma[index] = new G4DataVector();
>> 351
>> 352 G4double SIGMA = 0. ;
>> 353
>> 354 for ( G4int Ielem=0 ; Ielem < NbOfElements ; Ielem++ )
>> 355 {
>> 356 SIGMA += theAtomNumDensityVector[Ielem] *
>> 357 ComputeMicroscopicCrossSection( ParticleType, KineticEnergy,
>> 358 (*theElementVector)[Ielem]->GetZ(),
>> 359 eCut,pCut );
>> 360
>> 361 PartialSumSigma[index]->push_back(SIGMA);
>> 362 }
132 } 363 }
133 364
134 //....oooOO0OOooo........oooOO0OOooo........oo << 365 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 366
>> 367 G4double G4MuPairProduction::ComputeMicroscopicCrossSection(
>> 368 const G4ParticleDefinition* ParticleType,
>> 369 G4double KineticEnergy,
>> 370 G4double AtomicNumber,
>> 371 G4double ElectronEnergyCut,
>> 372 G4double PositronEnergyCut)
135 373
136 void G4MuPairProduction::StreamProcessInfo(std <<
137 { 374 {
138 G4ElementData* ed = EmModel()->GetElementDat << 375 static const G4double
139 if(ed) { << 376 xgi[] ={ 0.0199,0.1017,0.2372,0.4083,0.5917,0.7628,0.8983,0.9801 };
140 for(G4int Z=1; Z<93; ++Z) { << 377 static const G4double
141 G4Physics2DVector* pv = ed->GetElement2D << 378 wgi[] ={ 0.0506,0.1112,0.1569,0.1813,0.1813,0.1569,0.1112,0.0506 };
142 if(pv) { << 379 static const G4double ak1=6.9 ;
143 out << " Sampling table " << pv-> << 380 static const G4double ak2=1.0 ;
144 << "x" << pv->GetLengthX() << "; from " << 381
145 << std::exp(pv->GetY(0))/GeV << " GeV to << 382 static const G4double sqrte = sqrt(exp(1.)) ;
146 << std::exp(pv->GetY(pv->GetLengthY()-1) << 383 G4double z13 = exp(log(AtomicNumber)/3.) ;
147 << " TeV " << G4endl; << 384
148 break; << 385 G4double CrossSection = 0.0 ;
>> 386
>> 387 if ( AtomicNumber < 1. ) return CrossSection;
>> 388
>> 389 G4double CutInPairEnergy = ElectronEnergyCut+PositronEnergyCut
>> 390 +2.*electron_mass_c2 ;
>> 391
>> 392 if( CutInPairEnergy < 4.*electron_mass_c2 )
>> 393 CutInPairEnergy = 4.*electron_mass_c2 ;
>> 394
>> 395 G4double particleMass = ParticleType->GetPDGMass();
>> 396 G4double MaxPairEnergy = KineticEnergy+particleMass*(1.-0.75*sqrte*z13) ;
>> 397 if( CutInPairEnergy >= MaxPairEnergy ) return CrossSection ;
>> 398
>> 399 G4double aaa,bbb,hhh,x,epln,ep ;
>> 400 G4int kkk ;
>> 401 // calculate the total cross section
>> 402 // numerical integration in log(PairEnergy)
>> 403 aaa = log(CutInPairEnergy) ;
>> 404 bbb = log(MaxPairEnergy) ;
>> 405 kkk = int((bbb-aaa)/ak1+ak2) ;
>> 406 hhh = (bbb-aaa)/kkk ;
>> 407 for (G4int l=0 ; l<kkk; l++)
>> 408 {
>> 409 x = aaa+hhh*l ;
>> 410 for (G4int ll=0; ll<8; ll++)
>> 411 {
>> 412 epln = x+xgi[ll]*hhh;
>> 413 ep = exp(epln) ;
>> 414 CrossSection += wgi[ll]*ep*ComputeDMicroscopicCrossSection(ParticleType,
>> 415 KineticEnergy,AtomicNumber,
>> 416 ep) ;
>> 417 }
>> 418 }
>> 419 CrossSection *= hhh ;
>> 420
>> 421 if (CrossSection < 0.) CrossSection = 0.;
>> 422
>> 423 return CrossSection;
>> 424 }
>> 425
>> 426 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 427
>> 428 void G4MuPairProduction::MakeSamplingTables(
>> 429 const G4ParticleDefinition* ParticleType)
>> 430 {
>> 431 G4int nbin;
>> 432 G4double AtomicNumber,KineticEnergy ;
>> 433 G4double c,y,ymin,ymax,dy,yy,dx,x,ep ;
>> 434
>> 435 static const G4double sqrte = sqrt(exp(1.)) ;
>> 436 G4double particleMass = ParticleType->GetPDGMass();
>> 437
>> 438 for (G4int iz=0; iz<nzdat; iz++)
>> 439 {
>> 440 AtomicNumber = zdat[iz];
>> 441 G4double z13 = exp(log(AtomicNumber)/3.) ;
>> 442
>> 443 for (G4int it=0; it<ntdat; it++)
>> 444 {
>> 445 KineticEnergy = tdat[it];
>> 446 G4double MaxPairEnergy = KineticEnergy+particleMass*(1.-0.75*sqrte*z13) ;
>> 447
>> 448 G4double CrossSection = 0.0 ;
>> 449
>> 450 //G4int NbofIntervals ;
>> 451 c = log(MaxPairEnergy/MinPairEnergy) ;
>> 452
>> 453 ymin = -5. ;
>> 454 ymax = 0. ;
>> 455 dy = (ymax-ymin)/NBIN ;
>> 456 nbin=-1;
>> 457 y = ymin - 0.5*dy ;
>> 458 yy = ymin - dy ;
>> 459 for (G4int i=0 ; i<NBIN; i++)
>> 460 {
>> 461 y += dy ;
>> 462 x = exp(y) ;
>> 463 yy += dy ;
>> 464 dx = exp(yy+dy)-exp(yy) ;
>> 465 ep = MinPairEnergy*exp(c*x) ;
>> 466 CrossSection += ep*dx*ComputeDMicroscopicCrossSection(ParticleType,
>> 467 KineticEnergy,AtomicNumber,ep);
>> 468 if(nbin<NBIN)
>> 469 {
>> 470 nbin += 1 ;
>> 471 ya[nbin]=y ;
>> 472 proba[iz][it][nbin] = CrossSection ;
>> 473 }
149 } 474 }
>> 475 ya[NBIN]=0. ;
>> 476
>> 477 if(CrossSection > 0.)
>> 478 {
>> 479 for(G4int ib=0; ib<=nbin; ib++)
>> 480 {
>> 481 proba[iz][it][ib] /= CrossSection ;
>> 482
>> 483 }
>> 484 }
>> 485 }
>> 486 }
>> 487 }
>> 488
>> 489 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 490
>> 491 G4double G4MuPairProduction::ComputeDDMicroscopicCrossSection(
>> 492 const G4ParticleDefinition* ParticleType,
>> 493 G4double KineticEnergy, G4double AtomicNumber,
>> 494 G4double PairEnergy,G4double asymmetry)
>> 495 // Calculates the double differential (DD) microscopic cross section
>> 496 // using the cross section formula of R.P. Kokoulin (18/01/98)
>> 497 {
>> 498 static const G4double sqrte = sqrt(exp(1.)) ;
>> 499
>> 500 G4double bbbtf= 183. ;
>> 501 G4double bbbh = 202.4 ;
>> 502 G4double g1tf = 1.95e-5 ;
>> 503 G4double g2tf = 5.3e-5 ;
>> 504 G4double g1h = 4.4e-5 ;
>> 505 G4double g2h = 4.8e-5 ;
>> 506
>> 507 G4double particleMass = ParticleType->GetPDGMass();
>> 508 G4double massratio = particleMass/electron_mass_c2 ;
>> 509 G4double massratio2 = massratio*massratio ;
>> 510 G4double TotalEnergy = KineticEnergy + particleMass ;
>> 511 G4double z13 = exp(log(AtomicNumber)/3.) ;
>> 512 G4double z23 = z13*z13 ;
>> 513 G4double EnergyLoss = TotalEnergy - PairEnergy ;
>> 514
>> 515 G4double c3 = 3.*sqrte*particleMass/4. ;
>> 516
>> 517 G4double DDCrossSection = 0. ;
>> 518
>> 519 if(EnergyLoss <= c3*z13)
>> 520 return DDCrossSection ;
>> 521
>> 522 G4double c7 = 4.*electron_mass_c2 ;
>> 523 G4double c8 = 6.*particleMass*particleMass ;
>> 524 G4double alf = c7/PairEnergy ;
>> 525 G4double a3 = 1. - alf ;
>> 526
>> 527 if(a3 <= 0.)
>> 528 return DDCrossSection ;
>> 529
>> 530 // zeta calculation
>> 531 G4double bbb,g1,g2,zeta1,zeta2,zeta,z2 ;
>> 532 if( AtomicNumber < 1.5 )
>> 533 {
>> 534 bbb = bbbh ;
>> 535 g1 = g1h ;
>> 536 g2 = g2h ;
>> 537 }
>> 538 else
>> 539 {
>> 540 bbb = bbbtf ;
>> 541 g1 = g1tf ;
>> 542 g2 = g2tf ;
>> 543 }
>> 544 zeta1 = 0.073 * log(TotalEnergy/(particleMass+g1*z23*TotalEnergy))-0.26 ;
>> 545 if( zeta1 > 0.)
>> 546 {
>> 547 zeta2 = 0.058*log(TotalEnergy/(particleMass+g2*z13*TotalEnergy))-0.14 ;
>> 548 zeta = zeta1/zeta2 ;
>> 549 }
>> 550 else
>> 551 {
>> 552 zeta = 0. ;
>> 553 }
>> 554
>> 555 z2 = AtomicNumber*(AtomicNumber+zeta) ;
>> 556
>> 557 G4double screen0 = 2.*electron_mass_c2*sqrte*bbb/(z13*PairEnergy) ;
>> 558 G4double a0 = TotalEnergy*EnergyLoss ;
>> 559 G4double a1 = PairEnergy*PairEnergy/a0 ;
>> 560 G4double bet = 0.5*a1 ;
>> 561 G4double xi0 = 0.25*massratio2*a1 ;
>> 562 G4double del = c8/a0 ;
>> 563
>> 564 G4double romin = 0. ;
>> 565 G4double romax = (1.-del)*sqrt(1.-c7/PairEnergy) ;
>> 566
>> 567 if((asymmetry < romin) || (asymmetry > romax))
>> 568 return DDCrossSection ;
>> 569
>> 570 G4double a4 = 1.-asymmetry ;
>> 571 G4double a5 = a4*(2.-a4) ;
>> 572 G4double a6 = 1.-a5 ;
>> 573 G4double a7 = 1.+a6 ;
>> 574 G4double a9 = 3.+a6 ;
>> 575 G4double xi = xi0*a5 ;
>> 576 G4double xii = 1./xi ;
>> 577 G4double xi1 = 1.+xi ;
>> 578 G4double screen = screen0*xi1/a5 ;
>> 579
>> 580 G4double yeu = 5.-a6+4.*bet*a7 ;
>> 581 G4double yed = 2.*(1.+3.*bet)*log(3.+xii)-a6-a1*(2.-a6) ;
>> 582 G4double yel = 1.+yeu/yed ;
>> 583 G4double ale=log(bbb/z13*sqrt(xi1*yel)/(1.+screen*yel)) ;
>> 584 G4double cre = 0.5*log(1.+2.25/(massratio2*z23)*xi1*yel) ;
>> 585 G4double be ;
>> 586 if(xi <= 1.e3)
>> 587 be = ((2.+a6)*(1.+bet)+xi*a9)*log(1.+xii)+(a5-bet)/xi1-a9;
>> 588 else
>> 589 be = (3.-a6+a1*a7)/(2.+xi) ;
>> 590 G4double fe = (ale-cre)*be ;
>> 591 if( fe < 0.)
>> 592 fe = 0. ;
>> 593
>> 594 G4double ymu = 4.+a6 +3.*bet*a7 ;
>> 595 G4double ymd = a7*(1.5+a1)*log(3.+xi)+1.-1.5*a6 ;
>> 596 G4double ym1 = 1.+ymu/ymd ;
>> 597 G4double alm_crm = log(bbb*massratio/(1.5*z23*(1.+screen*ym1))) ;
>> 598 G4double a10,bm ;
>> 599 if( xi >= 1.e-3)
>> 600 {
>> 601 a10 = (1.+a1)*a5 ;
>> 602 bm = (a7*(1.+1.5*bet)-a10*xii)*log(xi1)+xi*(a5-bet)/xi1+a10 ;
>> 603 }
>> 604 else
>> 605 bm = (5.-a6+bet*a9)*(xi/2.) ;
>> 606 G4double fm = alm_crm*bm ;
>> 607 if( fm < 0.)
>> 608 fm = 0. ;
>> 609
>> 610 DDCrossSection = (fe+fm/massratio2) ;
>> 611
>> 612 DDCrossSection *= 4.*fine_structure_const*fine_structure_const
>> 613 *classic_electr_radius*classic_electr_radius/(3.*pi) ;
>> 614
>> 615 DDCrossSection *= z2*EnergyLoss/(TotalEnergy*PairEnergy) ;
>> 616
>> 617
>> 618 return DDCrossSection ;
>> 619
>> 620 }
>> 621
>> 622 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 623
>> 624 G4double G4MuPairProduction::GetDMicroscopicCrossSection(
>> 625 const G4ParticleDefinition* ParticleType,
>> 626 G4double KineticEnergy, G4double AtomicNumber,
>> 627 G4double PairEnergy)
>> 628 {
>> 629 return ComputeDMicroscopicCrossSection(ParticleType,KineticEnergy,
>> 630 AtomicNumber,PairEnergy) ;
>> 631 }
>> 632
>> 633 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 634
>> 635 G4double G4MuPairProduction::ComputeDMicroscopicCrossSection(
>> 636 const G4ParticleDefinition* ParticleType,
>> 637 G4double KineticEnergy, G4double AtomicNumber,
>> 638 G4double PairEnergy)
>> 639 // Calculates the differential (D) microscopic cross section
>> 640 // using the cross section formula of R.P. Kokoulin (18/01/98)
>> 641 {
>> 642
>> 643 static const G4double
>> 644 xgi[] ={ 0.0199,0.1017,0.2372,0.4083,0.5917,0.7628,0.8983,0.9801 };
>> 645
>> 646 static const G4double
>> 647 wgi[] ={ 0.0506,0.1112,0.1569,0.1813,0.1813,0.1569,0.1112,0.0506 };
>> 648
>> 649 G4double DCrossSection = 0. ;
>> 650
>> 651 G4double particleMass = ParticleType->GetPDGMass();
>> 652 G4double TotalEnergy = KineticEnergy + particleMass;
>> 653 G4double EnergyLoss = TotalEnergy - PairEnergy ;
>> 654 G4double a = 6.*particleMass*particleMass/(TotalEnergy*EnergyLoss) ;
>> 655 G4double b = 4.*electron_mass_c2/PairEnergy ;
>> 656
>> 657 if((b+2.*a*(1.-b))/(1.+(1.-a)*sqrt(1.-b)) <= 0.) return DCrossSection ;
>> 658
>> 659 G4double tmn=log((b+2.*a*(1.-b))/(1.+(1.-a)*sqrt(1.-b))) ;
>> 660
>> 661 // G4double DCrossSection = 0. ;
>> 662 G4double ro ;
>> 663 // Gaussian integration in ln(1-ro) ( with 8 points)
>> 664 for (G4int i=0; i<7; i++)
>> 665 {
>> 666 ro = 1.-exp(tmn*xgi[i]) ;
>> 667
>> 668 DCrossSection += (1.-ro)*ComputeDDMicroscopicCrossSection(
>> 669 ParticleType,KineticEnergy,
>> 670 AtomicNumber,PairEnergy,ro)
>> 671 *wgi[i] ;
>> 672 }
>> 673
>> 674 DCrossSection *= -tmn ;
>> 675
>> 676 return DCrossSection ;
>> 677
>> 678 }
>> 679
>> 680 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 681
>> 682 G4VParticleChange* G4MuPairProduction::PostStepDoIt(const G4Track& trackData,
>> 683 const G4Step& stepData)
>> 684 {
>> 685 static const G4double esq = sqrt(exp(1.));
>> 686
>> 687 aParticleChange.Initialize(trackData);
>> 688 const G4MaterialCutsCouple* couple = trackData.GetMaterialCutsCouple();
>> 689 size_t index = couple->GetIndex();
>> 690
>> 691 const G4DynamicParticle* aDynamicParticle=trackData.GetDynamicParticle();
>> 692 G4double KineticEnergy = aDynamicParticle->GetKineticEnergy();
>> 693 G4double particleMass = aDynamicParticle->GetDefinition()->GetPDGMass();
>> 694 G4ParticleMomentum ParticleDirection =
>> 695 aDynamicParticle->GetMomentumDirection();
>> 696
>> 697 // e-e+ cut in this material
>> 698 G4double eCut = (*electronEnergyCuts)[index] ;
>> 699 G4double pCut = (*positronEnergyCuts)[index] ;
>> 700 G4double CutInPairEnergy = eCut + pCut + 2.0*electron_mass_c2;
>> 701
>> 702 if (CutInPairEnergy < MinPairEnergy) CutInPairEnergy = MinPairEnergy ;
>> 703
>> 704 // check against insufficient energy
>> 705 if(KineticEnergy < CutInPairEnergy )
>> 706 return G4VContinuousDiscreteProcess::PostStepDoIt(trackData,stepData);
>> 707
>> 708 // select randomly one element constituing the material
>> 709 const G4Element* anElement = SelectRandomAtom(couple);
>> 710
>> 711 // limits of the energy sampling
>> 712 G4double TotalEnergy = KineticEnergy + particleMass ;
>> 713 //G4double TotalMomentum = sqrt(KineticEnergy*(TotalEnergy+particleMass)) ;
>> 714 G4double Z3 = anElement->GetIonisation()->GetZ3() ;
>> 715 G4double MaxPairEnergy = TotalEnergy-0.75*esq*particleMass*Z3 ;
>> 716
>> 717 if(MinPairEnergy >= MaxPairEnergy)
>> 718 return G4VContinuousDiscreteProcess::PostStepDoIt(trackData,stepData);
>> 719
>> 720 // sample e-e+ energy, pair energy first
>> 721 G4double PairEnergy,xc,x,yc,y ;
>> 722 // G4int iZ,iT;
>> 723 G4int iy ;
>> 724
>> 725 // select sampling table ;
>> 726 G4double lnZ = log(anElement->GetZ()) ;
>> 727 G4double delmin = 1.e10 ;
>> 728 G4double del ;
>> 729 G4int izz = 0;
>> 730 G4int itt = 0;
>> 731 G4int NBINminus1 = NBIN-1;
>> 732 for (G4int iz=0; iz<nzdat; iz++)
>> 733 {
>> 734 del = abs(lnZ-log(zdat[iz])) ;
>> 735 if(del<delmin)
>> 736 {
>> 737 delmin=del ;
>> 738 izz=iz ;
>> 739 }
>> 740 }
>> 741 delmin = 1.e10 ;
>> 742 for (G4int it=0; it<ntdat; it++)
>> 743 {
>> 744 del = abs(log(KineticEnergy)-log(tdat[it])) ;
>> 745 if(del<delmin)
>> 746 {
>> 747 delmin=del;
>> 748 itt=it ;
>> 749 }
>> 750 }
>> 751
>> 752 if( CutInPairEnergy <= MinPairEnergy)
>> 753 iy = 0 ;
>> 754 else
>> 755 {
>> 756 xc = log(CutInPairEnergy/MinPairEnergy)/log(MaxPairEnergy/MinPairEnergy) ;
>> 757 yc = log(xc) ;
>> 758
>> 759 iy = -1 ;
>> 760 do {
>> 761 iy += 1 ;
>> 762 } while ((ya[iy] < yc )&&(iy < NBINminus1)) ;
>> 763 }
>> 764
>> 765 G4double norm = proba[izz][itt][iy] ;
>> 766 G4double r = norm + G4UniformRand()*(1.-norm);
>> 767
>> 768 iy -= 1 ;
>> 769 do { iy += 1; } while ((proba[izz][itt][iy] < r) && (iy < NBINminus1));
>> 770
>> 771 //sampling is uniformly in y in the bin
>> 772 if (iy < NBIN) y = ya[iy] + G4UniformRand()*(ya[iy+1] - ya[iy]);
>> 773 else y = ya[iy];
>> 774
>> 775 x = exp(y);
>> 776
>> 777 PairEnergy = MinPairEnergy*exp(x*log(MaxPairEnergy/MinPairEnergy));
>> 778
>> 779 // sample r=(E+-E-)/PairEnergy ( uniformly .....)
>> 780 G4double rmax =
>> 781 (1.-6.*particleMass*particleMass/(TotalEnergy*(TotalEnergy-PairEnergy)))
>> 782 *sqrt(1.-MinPairEnergy/PairEnergy);
>> 783 r = rmax * (-1.+2.*G4UniformRand());
>> 784
>> 785 // compute energies from PairEnergy,r
>> 786 G4double ElectronEnergy = (1-r)*PairEnergy/2.;
>> 787 G4double PositronEnergy = (1+r)*PairEnergy/2.;
>> 788
>> 789 // angles of the emitted particles ( Z - axis along the parent particle)
>> 790 // (mean theta for the moment)
>> 791 G4double Teta = electron_mass_c2/TotalEnergy;
>> 792
>> 793 G4double Phi = twopi * G4UniformRand();
>> 794 G4double dirx = sin(Teta)*cos(Phi) , diry = sin(Teta)*sin(Phi) ,
>> 795 dirz = cos(Teta);
>> 796
>> 797 G4double LocalEnerDeposit = 0.;
>> 798 G4int numberofsecondaries = 1;
>> 799 G4int flagelectron = 0;
>> 800 G4int flagpositron = 1;
>> 801 G4DynamicParticle* aParticle1 = 0;
>> 802 G4DynamicParticle* aParticle2 = 0;
>> 803
>> 804 // e-
>> 805 //
>> 806 G4double ElectKineEnergy = ElectronEnergy - electron_mass_c2 ;
>> 807 if (ElectKineEnergy > eCut)
>> 808 {
>> 809 numberofsecondaries += 1;
>> 810 flagelectron = 1;
>> 811 G4ThreeVector ElectDirection ( dirx, diry, dirz );
>> 812 ElectDirection.rotateUz(ParticleDirection);
>> 813 // create G4DynamicParticle object for the particle1
>> 814 aParticle1 = new G4DynamicParticle (G4Electron::Electron(),
>> 815 ElectDirection, ElectKineEnergy);
>> 816 }
>> 817 else { LocalEnerDeposit += ElectKineEnergy;}
>> 818
>> 819 // the e+ is always created (even with Ekine=0) for further annihilation.
>> 820 //
>> 821 G4double PositKineEnergy = PositronEnergy - electron_mass_c2;
>> 822 if (PositKineEnergy < pCut)
>> 823 {
>> 824 LocalEnerDeposit += PositKineEnergy;
>> 825 PositKineEnergy = 0.;
150 } 826 }
>> 827 G4ThreeVector PositDirection ( -dirx, -diry, dirz );
>> 828 PositDirection.rotateUz(ParticleDirection);
>> 829 // create G4DynamicParticle object for the particle2
>> 830 aParticle2= new G4DynamicParticle (G4Positron::Positron(),
>> 831 PositDirection, PositKineEnergy);
>> 832
>> 833 // fill particle change and update initial particle
>> 834 aParticleChange.SetNumberOfSecondaries(numberofsecondaries) ;
>> 835 if (flagelectron==1) aParticleChange.AddSecondary(aParticle1);
>> 836 if (flagpositron==1) aParticleChange.AddSecondary(aParticle2);
>> 837
>> 838 G4double NewKinEnergy = KineticEnergy - ElectronEnergy - PositronEnergy;
>> 839
>> 840 aParticleChange.SetMomentumChange(ParticleDirection);
>> 841
>> 842 if (NewKinEnergy > 0.) aParticleChange.SetEnergyChange(NewKinEnergy);
>> 843 else { aParticleChange.SetEnergyChange(0.);
>> 844 aParticleChange.SetStatusChange(fStopButAlive);
>> 845 }
>> 846
>> 847 aParticleChange.SetLocalEnergyDeposit(LocalEnerDeposit);
>> 848
>> 849 //reset NumberOfinteractionLengthLeft()
>> 850 return G4VContinuousDiscreteProcess::PostStepDoIt(trackData,stepData);
>> 851 }
>> 852
>> 853 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 854
>> 855 G4Element* G4MuPairProduction::SelectRandomAtom(const G4MaterialCutsCouple* couple) const
>> 856 {
>> 857 // select randomly 1 element within the material
>> 858 size_t index = couple->GetIndex();
>> 859 const G4Material* aMaterial = couple->GetMaterial();
>> 860
>> 861 const G4int NumberOfElements = aMaterial->GetNumberOfElements();
>> 862 const G4ElementVector* theElementVector = aMaterial->GetElementVector();
>> 863
>> 864 G4double rval = G4UniformRand()*((*PartialSumSigma[index])
>> 865 [NumberOfElements-1]);
>> 866
>> 867 for ( G4int i=0; i < NumberOfElements; i++ )
>> 868 {
>> 869 if (rval <= (*PartialSumSigma[index])[i]) return ((*theElementVector)[i]);
151 } 870 }
>> 871 G4cout << " WARNING !!! - The Material '"<< aMaterial->GetName()
>> 872 << "' has no elements, NULL pointer returned." << G4endl;
>> 873 return 0;
152 } 874 }
153 875
154 //....oooOO0OOooo........oooOO0OOooo........oo << 876 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
155 877
156 void G4MuPairProduction::ProcessDescription(st << 878 G4bool G4MuPairProduction::StorePhysicsTable(G4ParticleDefinition* particle,
>> 879 const G4String& directory,
>> 880 G4bool ascii)
157 { 881 {
158 out << " Electron-positron pair production << 882 G4String filename;
159 G4VEnergyLossProcess::ProcessDescription(out << 883
>> 884 // store stopping power table
>> 885 filename = GetPhysicsTableFileName(particle,directory,"StoppingPower",ascii);
>> 886 if ( !theLossTable->StorePhysicsTable(filename, ascii) ){
>> 887 G4cout << " FAIL theLossTable->StorePhysicsTable in " << filename
>> 888 << G4endl;
>> 889 return false;
>> 890 }
>> 891 // store mean free path table
>> 892 filename = GetPhysicsTableFileName(particle,directory,"MeanFreePath",ascii);
>> 893 if ( !theMeanFreePathTable->StorePhysicsTable(filename, ascii) ){
>> 894 G4cout << " FAIL theMeanFreePathTable->StorePhysicsTable in " << filename
>> 895 << G4endl;
>> 896 return false;
>> 897 }
>> 898
>> 899 // store PartialSumSigma table (G4OrderedTable)
>> 900 filename = GetPhysicsTableFileName(particle,directory,"PartSumSigma",ascii);
>> 901 if ( !PartialSumSigma.Store(filename, ascii) ){
>> 902 G4cout << " FAIL PartialSumSigma.store in " << filename
>> 903 << G4endl;
>> 904 return false;
>> 905 }
>> 906 G4cout << GetProcessName() << "for " << particle->GetParticleName()
>> 907 << ": Success to store the PhysicsTables in "
>> 908 << directory << G4endl;
>> 909
>> 910 return true;
160 } 911 }
161 912
162 //....oooOO0OOooo........oooOO0OOooo........oo << 913 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 914
>> 915 G4bool G4MuPairProduction::RetrievePhysicsTable(G4ParticleDefinition* particle,
>> 916 const G4String& directory,
>> 917 G4bool ascii)
>> 918 {
>> 919 // delete theLossTable and theMeanFreePathTable
>> 920 if (theLossTable != 0) {
>> 921 theLossTable->clearAndDestroy();
>> 922 delete theLossTable;
>> 923 }
>> 924 if (theMeanFreePathTable != 0) {
>> 925 theMeanFreePathTable->clearAndDestroy();
>> 926 delete theMeanFreePathTable;
>> 927 }
>> 928
>> 929 // get bining from EnergyLoss
>> 930 LowestKineticEnergy = GetLowerBoundEloss();
>> 931 HighestKineticEnergy = GetUpperBoundEloss();
>> 932 TotBin = GetNbinEloss();
>> 933
>> 934 G4String filename;
>> 935 const G4ProductionCutsTable* theCoupleTable=
>> 936 G4ProductionCutsTable::GetProductionCutsTable();
>> 937 size_t numOfCouples = theCoupleTable->GetTableSize();
>> 938 electronEnergyCuts = theCoupleTable->GetEnergyCutsVector(1);
>> 939 positronEnergyCuts = theCoupleTable->GetEnergyCutsVector(2);
>> 940
>> 941 // retreive stopping power table
>> 942 filename = GetPhysicsTableFileName(particle,directory,"StoppingPower",ascii);
>> 943 theLossTable = new G4PhysicsTable(numOfCouples);
>> 944 if ( !theLossTable->RetrievePhysicsTable(filename, ascii) ){
>> 945 G4cout << " FAIL theLossTable0->RetrievePhysicsTable in " << filename
>> 946 << G4endl;
>> 947 return false;
>> 948 }
>> 949
>> 950 // retreive mean free path table
>> 951 filename = GetPhysicsTableFileName(particle,directory,"MeanFreePath",ascii);
>> 952 theMeanFreePathTable = new G4PhysicsTable(numOfCouples);
>> 953 if ( !theMeanFreePathTable->RetrievePhysicsTable(filename, ascii) ){
>> 954 G4cout << " FAIL theMeanFreePathTable->RetrievePhysicsTable in " << filename
>> 955 << G4endl;
>> 956 return false;
>> 957 }
>> 958
>> 959 // retrieve PartialSumSigma table (G4OrderedTable)
>> 960 PartialSumSigma.clearAndDestroy();
>> 961 PartialSumSigma.reserve(numOfCouples);
>> 962 filename = GetPhysicsTableFileName(particle,directory,"PartSumSigma",ascii);
>> 963 if ( !PartialSumSigma.Retrieve(filename, ascii) ){
>> 964 G4cout << " FAIL PartialSumSigma.retrieve in " << filename
>> 965 << G4endl;
>> 966 return false;
>> 967 }
>> 968
>> 969 G4cout << GetProcessName() << "for " << particle->GetParticleName()
>> 970 << ": Success to retrieve the PhysicsTables from "
>> 971 << directory << G4endl;
>> 972
>> 973 if (particle->GetPDGCharge() < 0.)
>> 974 {
>> 975 RecorderOfmuminusProcess[CounterOfmuminusProcess] = (*this).theLossTable;
>> 976 CounterOfmuminusProcess++;
>> 977 }
>> 978 else
>> 979 {
>> 980 RecorderOfmuplusProcess[CounterOfmuplusProcess] = (*this).theLossTable;
>> 981 CounterOfmuplusProcess++;
>> 982 }
>> 983
>> 984 MakeSamplingTables(particle);
>> 985 G4VMuEnergyLoss::BuildDEDXTable(*particle);
>> 986 if(particle==G4MuonPlus::MuonPlus()) PrintInfoDefinition();
>> 987
>> 988 return true;
>> 989 }
>> 990
>> 991 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 992
>> 993 void G4MuPairProduction::PrintInfoDefinition()
>> 994 {
>> 995 G4String comments = "theoretical cross sections \n ";
>> 996 comments += " Good description up to 1000 PeV.";
>> 997
>> 998 G4cout << G4endl << GetProcessName() << ": " << comments
>> 999 << "\n PhysicsTables from " << G4BestUnit(LowerBoundLambda,
>> 1000 "Energy")
>> 1001 << " to " << G4BestUnit(UpperBoundLambda,"Energy")
>> 1002 << " in " << NbinLambda << " bins. \n";
>> 1003 }
>> 1004
>> 1005 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 1006
163 1007