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28 // GEANT4 Class file << 24 // $Id: G4eIonisation.cc,v 1.29 2003/04/26 11:38:12 vnivanch Exp $
>> 25 // GEANT4 tag $Name: geant4-05-01-patch-01 $
29 // 26 //
>> 27 //--------------- G4eIonisation physics process --------------------------------
>> 28 // by Laszlo Urban, 20 March 1997
>> 29 //------------------------------------------------------------------------------
30 // 30 //
31 // File name: G4eIonisation << 31 // 07-04-98 remove 'tracking cut' of the ionizing particle, mma
32 // << 32 // 04-09-98 new methods SetBining() PrintInfo()
33 // Author: Laszlo Urban << 33 // 07-09-98 Cleanup
34 // << 34 // 02-02-99 correction inDoIt , L.Urban
35 // Creation date: 20.03.1997 << 35 // 10-02-00 modifications , new e.m. structure, L.Urban
36 // << 36 // 28-05-01 V.Ivanchenko minor changes to provide ANSI -wall compilation
37 // Modified by Michel Maire and Vladimir Ivanc << 37 // 09-08-01 new methods Store/Retrieve PhysicsTable (mma)
38 // << 38 // 13-08-01 new function ComputeRestrictedMeandEdx() (mma)
39 // ------------------------------------------- << 39 // 17-09-01 migration of Materials to pure STL (mma)
40 // << 40 // 21-09-01 completion of RetrievePhysicsTable() (mma)
41 //....oooOO0OOooo........oooOO0OOooo........oo << 41 // 29-10-01 all static functions no more inlined (mma)
42 //....oooOO0OOooo........oooOO0OOooo........oo << 42 // 07-11-01 particleMass and Charge become local variables
>> 43 // 26-03-02 change access to cuts in BuildLossTables (V.Ivanchenko)
>> 44 // 16-01-03 Migrade to cut per region (V.Ivanchenko)
>> 45 // 08-04-03 finalRange is region aware (V.Ivanchenko)
>> 46 // 26-04-03 fix problems of retrieve tables (V.Ivanchenko)
>> 47 //------------------------------------------------------------------------------
>> 48
>> 49 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 50 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
43 51
44 #include "G4eIonisation.hh" 52 #include "G4eIonisation.hh"
45 #include "G4Electron.hh" << 53 #include "G4UnitsTable.hh"
46 #include "G4MollerBhabhaModel.hh" << 54 #include "G4ProductionCutsTable.hh"
47 #include "G4EmParameters.hh" << 55
48 #include "G4EmStandUtil.hh" << 56 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 57
>> 58 G4double G4eIonisation::LowerBoundLambda = 1.*keV;
>> 59 G4double G4eIonisation::UpperBoundLambda = 100.*TeV;
>> 60 G4int G4eIonisation::NbinLambda = 100;
>> 61
>> 62 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 63
>> 64 G4eIonisation::G4eIonisation(const G4String& processName)
>> 65 : G4VeEnergyLoss(processName),
>> 66 theMeanFreePathTable(NULL)
>> 67 {}
49 68
50 //....oooOO0OOooo........oooOO0OOooo........oo << 69 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
51 70
52 G4eIonisation::G4eIonisation(const G4String& n << 71 G4eIonisation::~G4eIonisation()
53 : G4VEnergyLossProcess(name), <<
54 theElectron(G4Electron::Electron()), <<
55 isElectron(true), <<
56 isInitialised(false) <<
57 { 72 {
58 SetProcessSubType(fIonisation); << 73 if (theMeanFreePathTable)
59 SetSecondaryParticle(theElectron); << 74 {theMeanFreePathTable->clearAndDestroy(); delete theMeanFreePathTable;}
60 } 75 }
61 76
62 //....oooOO0OOooo........oooOO0OOooo........oo << 77 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 78
>> 79 void G4eIonisation::SetLowerBoundLambda(G4double val)
>> 80 {LowerBoundLambda = val;}
>> 81
>> 82 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 83
>> 84 void G4eIonisation::SetUpperBoundLambda(G4double val)
>> 85 {UpperBoundLambda = val;}
>> 86
>> 87 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 88
>> 89 void G4eIonisation::SetNbinLambda(G4int n)
>> 90 {NbinLambda = n;}
>> 91
>> 92 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 93
>> 94 G4double G4eIonisation::GetLowerBoundLambda()
>> 95 {return LowerBoundLambda;}
>> 96
>> 97 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 98
>> 99 G4double G4eIonisation::GetUpperBoundLambda()
>> 100 {return UpperBoundLambda;}
>> 101
>> 102 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 103
>> 104 G4int G4eIonisation::GetNbinLambda()
>> 105 {return NbinLambda;}
>> 106
>> 107 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 108
>> 109 void G4eIonisation::BuildPhysicsTable(const G4ParticleDefinition& aParticleType)
>> 110 {
>> 111 if( !CutsWhereModified() && theLossTable) return;
>> 112
>> 113 LowestKineticEnergy = GetLowerBoundEloss();
>> 114 HighestKineticEnergy = GetUpperBoundEloss();
>> 115 TotBin = GetNbinEloss();
>> 116
>> 117 BuildLossTable(aParticleType);
>> 118
>> 119 if (&aParticleType==G4Electron::Electron())
>> 120 {
>> 121 RecorderOfElectronProcess[CounterOfElectronProcess] = (*this).theLossTable;
>> 122 CounterOfElectronProcess++;
>> 123 }
>> 124 else
>> 125 {
>> 126 RecorderOfPositronProcess[CounterOfPositronProcess] = (*this).theLossTable;
>> 127 CounterOfPositronProcess++;
>> 128 }
>> 129
>> 130 BuildLambdaTable(aParticleType);
>> 131
>> 132 BuildDEDXTable(aParticleType);
>> 133
>> 134 if (&aParticleType==G4Electron::Electron()) PrintInfoDefinition();
>> 135 }
>> 136
>> 137 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 138
>> 139 void G4eIonisation::BuildLossTable(const G4ParticleDefinition& aParticleType)
>> 140 {
>> 141
>> 142 const G4ProductionCutsTable* theCoupleTable=
>> 143 G4ProductionCutsTable::GetProductionCutsTable();
>> 144 size_t numOfCouples = theCoupleTable->GetTableSize();
>> 145
>> 146 if (theLossTable) {theLossTable->clearAndDestroy(); delete theLossTable;}
>> 147 theLossTable = new G4PhysicsTable(numOfCouples);
>> 148
>> 149 secondaryEnergyCuts = theCoupleTable->GetEnergyCutsVector(1);
>> 150
>> 151 // loop for materials
>> 152 //
>> 153 for (size_t J=0; J<numOfCouples; J++)
>> 154 {
>> 155
>> 156 G4PhysicsLogVector* aVector = new G4PhysicsLogVector(
>> 157 LowestKineticEnergy, HighestKineticEnergy, TotBin);
>> 158
>> 159 const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(J);
>> 160 const G4Material* material= couple->GetMaterial();
>> 161
>> 162 // get electron cut in kinetic energy for the material
>> 163 G4double DeltaThreshold = SecondaryEnergyThreshold(J);
>> 164
>> 165
>> 166 // now comes the loop for the kinetic energy values
>> 167 //
>> 168 for (G4int i = 0; i < TotBin; i++)
>> 169 {
>> 170 G4double dEdx = ComputeRestrictedMeandEdx(aParticleType,
>> 171 aVector->GetLowEdgeEnergy(i),
>> 172 material,
>> 173 DeltaThreshold);
>> 174 if(1 < verboseLevel) {
>> 175 G4cout << "Material= " << material->GetName()
>> 176 << " E(MeV)= " << aVector->GetLowEdgeEnergy(i)/MeV
>> 177 << " dEdx(MeV/mm)= " << dEdx*mm/MeV
>> 178 << G4endl;
>> 179 }
>> 180 aVector->PutValue(i,dEdx);
>> 181 }
>> 182 theLossTable->insert(aVector);
>> 183 }
>> 184 }
>> 185
>> 186 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 187
>> 188 void G4eIonisation::BuildLambdaTable(const G4ParticleDefinition& aParticleType)
>> 189 {
>> 190
>> 191 if(0 < verboseLevel) {
>> 192 G4cout << "G4eIonisation::BuildLambdaTable() for process "
>> 193 << GetProcessName() << " and particle "
>> 194 << aParticleType.GetParticleName() << G4endl;
>> 195 }
63 196
64 G4eIonisation::~G4eIonisation() = default; << 197 //create table
>> 198 //
>> 199 const G4ProductionCutsTable* theCoupleTable=
>> 200 G4ProductionCutsTable::GetProductionCutsTable();
>> 201 size_t numOfCouples = theCoupleTable->GetTableSize();
>> 202
>> 203 if (theMeanFreePathTable)
>> 204 { theMeanFreePathTable->clearAndDestroy(); delete theMeanFreePathTable;}
>> 205
>> 206 theMeanFreePathTable = new G4PhysicsTable(numOfCouples);
>> 207
>> 208 secondaryEnergyCuts = theCoupleTable->GetEnergyCutsVector(1);
>> 209
>> 210 // loop for materials
>> 211
>> 212 for (size_t J=0 ; J < numOfCouples; J++)
>> 213 {
>> 214
>> 215 G4PhysicsLogVector* aVector = new G4PhysicsLogVector(
>> 216 LowerBoundLambda, UpperBoundLambda, NbinLambda);
>> 217
>> 218 // compute the (macroscopic) cross section first
>> 219 const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(J);
>> 220 const G4Material* material= couple->GetMaterial();
>> 221
>> 222 // get electron cut in kinetic energy for the material
>> 223 G4double DeltaThreshold = SecondaryEnergyThreshold(J);
>> 224
>> 225 const G4ElementVector* theElementVector = material->GetElementVector();
>> 226 const G4double* NbOfAtomsPerVolume = material->GetVecNbOfAtomsPerVolume();
>> 227 G4int NumberOfElements = material->GetNumberOfElements();
>> 228
>> 229 for (G4int i = 0 ; i < NbinLambda ; i++)
>> 230 {
>> 231 G4double LowEdgeEnergy = aVector->GetLowEdgeEnergy(i);
>> 232 G4double SIGMA = 0.;
>> 233 for (G4int iel=0; iel<NumberOfElements; iel++ )
>> 234 {
>> 235 SIGMA += NbOfAtomsPerVolume[iel]*
>> 236 ComputeCrossSectionPerAtom(aParticleType,
>> 237 LowEdgeEnergy,
>> 238 (*theElementVector)[iel]->GetZ(),
>> 239 DeltaThreshold);
>> 240 }
>> 241
>> 242 // mean free path = 1./macroscopic cross section
>> 243 G4double Value = SIGMA > DBL_MIN ? 1./SIGMA : DBL_MAX;
>> 244 aVector->PutValue(i, Value);
>> 245 }
>> 246 theMeanFreePathTable->insert(aVector);
>> 247 }
>> 248 }
65 249
66 //....oooOO0OOooo........oooOO0OOooo........oo << 250 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
67 251
68 G4double G4eIonisation::MinPrimaryEnergy(const << 252 G4double G4eIonisation::ComputeRestrictedMeandEdx (
69 const G4Material*, << 253 const G4ParticleDefinition& aParticleType,
70 G4double cut) << 254 G4double KineticEnergy,
>> 255 const G4Material* material,
>> 256 G4double DeltaThreshold)
71 { 257 {
72 G4double x = cut; << 258 // calculate the dE/dx due to the ionization process (Geant4 internal units)
73 if(isElectron) x += cut; << 259 // Seltzer-Berger formula
74 return x; << 260 //
>> 261 G4double particleMass = aParticleType.GetPDGMass();
>> 262
>> 263 G4double ElectronDensity = material->GetElectronDensity();
>> 264 G4double Eexc = material->GetIonisation()->GetMeanExcitationEnergy();
>> 265 Eexc /= particleMass; G4double Eexcm2 = Eexc*Eexc;
>> 266
>> 267 // for the lowenergy extrapolation
>> 268 G4double Zeff = material->GetTotNbOfElectPerVolume()/
>> 269 material->GetTotNbOfAtomsPerVolume();
>> 270 G4double Th = 0.25*sqrt(Zeff)*keV;
>> 271 G4double Tsav = 0.;
>> 272 if (KineticEnergy < Th) {Tsav = KineticEnergy; KineticEnergy = Th;}
>> 273
>> 274 G4double tau = KineticEnergy/particleMass;
>> 275 G4double gamma = tau + 1., gamma2 = gamma*gamma, bg2 = tau*(tau+2.);
>> 276 G4double beta2 = bg2/gamma2;
>> 277
>> 278 G4double Tmax,d,dEdx;
>> 279
>> 280 // electron
>> 281 if (&aParticleType==G4Electron::Electron())
>> 282 {
>> 283 Tmax = KineticEnergy/2.;
>> 284 d = G4std::min(DeltaThreshold, Tmax)/particleMass;
>> 285 dEdx = log(2.*(tau+2.)/Eexcm2)-1.-beta2
>> 286 + log((tau-d)*d)+tau/(tau-d)
>> 287 + (0.5*d*d+(2.*tau+1.)*log(1.-d/tau))/gamma2;
>> 288 }
>> 289
>> 290 else //positron
>> 291 {
>> 292 Tmax = KineticEnergy;
>> 293 d = G4std::min(DeltaThreshold, Tmax)/particleMass;
>> 294 G4double d2=d*d/2., d3=d*d*d/3., d4=d*d*d*d/4.;
>> 295 G4double y=1./(1.+gamma);
>> 296 dEdx = log(2.*(tau+2.)/Eexcm2)+log(tau*d)
>> 297 - beta2*(tau+2.*d-y*(3.*d2+y*(d-d3+y*(d2-tau*d3+d4))))/tau;
>> 298 }
>> 299
>> 300 //density correction
>> 301 G4double Cden = material->GetIonisation()->GetCdensity();
>> 302 G4double Mden = material->GetIonisation()->GetMdensity();
>> 303 G4double Aden = material->GetIonisation()->GetAdensity();
>> 304 G4double X0den = material->GetIonisation()->GetX0density();
>> 305 G4double X1den = material->GetIonisation()->GetX1density();
>> 306
>> 307 const G4double twoln10 = 2.*log(10.);
>> 308 G4double x = log(bg2)/twoln10;
>> 309 G4double delta;
>> 310 if (x < X0den) delta = 0.;
>> 311 else {delta = twoln10*x - Cden;
>> 312 if (x < X1den) delta += Aden*pow((X1den-x),Mden);
>> 313 }
>> 314
>> 315 //now you can compute the total ionization loss
>> 316 dEdx -= delta;
>> 317 dEdx *= twopi_mc2_rcl2*ElectronDensity/beta2;
>> 318 if (dEdx <= 0.) dEdx = 0.;
>> 319
>> 320 // low energy ?
>> 321 const G4double Tl = 0.2*keV;
>> 322 if (Tsav > 0.)
>> 323 {
>> 324 if (Tsav >= Tl) dEdx *= sqrt(KineticEnergy/Tsav);
>> 325 else dEdx *= sqrt(KineticEnergy*Tsav)/Tl;
>> 326 }
>> 327 return dEdx;
75 } 328 }
76 329
77 //....oooOO0OOooo........oooOO0OOooo........oo << 330 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
78 331
79 G4bool G4eIonisation::IsApplicable(const G4Par << 332 G4double G4eIonisation::ComputeCrossSectionPerAtom(
>> 333 const G4ParticleDefinition& aParticleType,
>> 334 G4double KineticEnergy,
>> 335 G4double AtomicNumber ,
>> 336 G4double DeltaThreshold)
80 { 337 {
81 return (&p == theElectron || &p == G4Positro << 338 // calculates the cross section per atom (Geant4 internal units)
>> 339 //(it is called for elements , AtomicNumber = Z )
>> 340
>> 341 G4double particleMass = aParticleType.GetPDGMass();
>> 342 G4double TotalEnergy = KineticEnergy + particleMass;
>> 343
>> 344 G4double betasquare = KineticEnergy*(TotalEnergy+particleMass)
>> 345 /(TotalEnergy*TotalEnergy);
>> 346 G4double gamma = TotalEnergy/particleMass, gamma2 = gamma*gamma;
>> 347 G4double x=DeltaThreshold/KineticEnergy, x2 = x*x;
>> 348
>> 349 G4double MaxKineticEnergyTransfer;
>> 350 if (&aParticleType==G4Electron::Electron())
>> 351 MaxKineticEnergyTransfer = 0.5*KineticEnergy;
>> 352 else MaxKineticEnergyTransfer = KineticEnergy;
>> 353
>> 354
>> 355 G4double TotalCrossSection = 0.;
>> 356 if (MaxKineticEnergyTransfer > DeltaThreshold)
>> 357 {
>> 358 if (&aParticleType==G4Electron::Electron()) //Moller (e-e-) scattering
>> 359 {
>> 360 TotalCrossSection = (gamma-1.)*(gamma-1.)*(0.5-x)/gamma2 + 1./x
>> 361 - 1./(1.-x)-(2.*gamma-1.)*log((1.-x)/x)/gamma2;
>> 362 TotalCrossSection /= betasquare;
>> 363 }
>> 364 else //Bhabha (e+e-) scattering
>> 365 {
>> 366 G4double y=1./(1.+gamma), y2 =y*y, y12=1.-2.*y;
>> 367 G4double b1=2.-y2, b2=y12*(3.+y2), b4=y12*y12*y12, b3=b4+y12*y12;
>> 368 TotalCrossSection = (1./x-1.)/betasquare+b1*log(x)+b2*(1.-x)
>> 369 - b3*(1.-x2)/2.+b4*(1.-x2*x)/3.;
>> 370 }
>> 371 TotalCrossSection *= (twopi_mc2_rcl2*AtomicNumber/KineticEnergy);
>> 372 }
>> 373 return TotalCrossSection ;
82 } 374 }
83 375
84 //....oooOO0OOooo........oooOO0OOooo........oo << 376 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
85 377
86 void G4eIonisation::InitialiseEnergyLossProces << 378 G4VParticleChange* G4eIonisation::PostStepDoIt( const G4Track& trackData,
87 const G4ParticleDefinition* part, << 379 const G4Step& stepData)
88 const G4ParticleDefinition*) <<
89 { 380 {
90 if(!isInitialised) { << 381 aParticleChange.Initialize(trackData);
91 if(part != theElectron) { isElectron = fal << 382
92 if (nullptr == EmModel(0)) { SetEmModel(ne << 383 const G4MaterialCutsCouple* couple = trackData.GetMaterialCutsCouple();
93 G4EmParameters* param = G4EmParameters::In << 384 const G4DynamicParticle* aParticle = trackData.GetDynamicParticle();
94 EmModel(0)->SetLowEnergyLimit(param->MinKi << 385
95 EmModel(0)->SetHighEnergyLimit(param->MaxK << 386 G4double particleMass = aParticle->GetDefinition()->GetPDGMass();
96 if (nullptr == FluctModel()) { << 387 G4double Charge = aParticle->GetDefinition()->GetPDGCharge();
97 SetFluctModel(G4EmStandUtil::ModelOfFluc << 388 G4double KineticEnergy = aParticle->GetKineticEnergy();
>> 389 G4double TotalEnergy = KineticEnergy + particleMass;
>> 390 G4double Psquare = KineticEnergy*(TotalEnergy+particleMass);
>> 391 G4double TotalMomentum = sqrt(Psquare);
>> 392 G4ParticleMomentum ParticleDirection = aParticle->GetMomentumDirection();
>> 393
>> 394 // get kinetic energy cut for the electron
>> 395 G4double DeltaThreshold = SecondaryEnergyThreshold(couple->GetIndex());
>> 396
>> 397 // some kinematics
>> 398 G4double MaxKineticEnergyTransfer;
>> 399 if (Charge < 0.) MaxKineticEnergyTransfer = 0.5*KineticEnergy;
>> 400 else MaxKineticEnergyTransfer = KineticEnergy;
>> 401
>> 402 // sampling kinetic energy of the delta ray
>> 403
>> 404 if (MaxKineticEnergyTransfer <= DeltaThreshold)
>> 405 // pathological case (should not happen, there is no change at all)
>> 406 return G4VContinuousDiscreteProcess::PostStepDoIt(trackData,stepData);
>> 407
>> 408
>> 409 // normal case
>> 410 G4double cc,y,y2,c2,b0,b1,b2,b3,b4,x,x1,grej,grejc;
>> 411
>> 412 G4double tau = KineticEnergy/particleMass;
>> 413 G4double gamma = tau+1., gamma2=gamma*gamma;
>> 414 G4double xc = DeltaThreshold/KineticEnergy, xc1=1.-xc;
>> 415
>> 416 if (Charge < 0.) // Moller (e-e-) scattering
>> 417 {
>> 418 b1=4./(9.*gamma2-10.*gamma+5.);
>> 419 b2=tau*tau*b1; b3=(2.*gamma2+2.*gamma-1.)*b1;
>> 420 cc=1.-2.*xc;
>> 421 do {
>> 422 x = xc/(1.-cc*G4UniformRand()); x1 = 1.-x;
>> 423 grej = b2*x*x-b3*x/x1+b1*gamma2/(x1*x1);
>> 424 } while (G4UniformRand()>grej);
>> 425 }
>> 426 else // Bhabha (e+e-) scattering
>> 427 {
>> 428 y=1./(gamma+1.); y2=y*y; cc=1.-2.*y;
>> 429 b1=2.-y2; b2=cc*(3.+y2);
>> 430 c2=cc*cc; b4=c2*cc; b3=c2+b4;
>> 431 b0=gamma2/(gamma2-1.);
>> 432 grejc=(((b4*xc-b3)*xc+b2)*xc-b1)*xc+b0;
>> 433 do {
>> 434 x = xc/(1.-xc1*G4UniformRand());
>> 435 grej = ((((b4*x-b3)*x+b2)*x-b1)*x+b0)/grejc;
>> 436 } while (G4UniformRand()>grej);
98 } 437 }
99 AddEmModel(1, EmModel(), FluctModel()); << 438
100 isInitialised = true; << 439 G4double DeltaKineticEnergy = x * KineticEnergy;
>> 440
>> 441 // protection :do not produce a secondary with 0. kinetic energy !
>> 442 if (DeltaKineticEnergy <= 0.)
>> 443 return G4VContinuousDiscreteProcess::PostStepDoIt(trackData,stepData);
>> 444
>> 445 G4double DeltaTotalMomentum = sqrt(DeltaKineticEnergy*(DeltaKineticEnergy +
>> 446 2.*electron_mass_c2 ));
>> 447
>> 448 G4double costheta = DeltaKineticEnergy * (TotalEnergy + electron_mass_c2)
>> 449 /(DeltaTotalMomentum * TotalMomentum);
>> 450
>> 451 if (costheta < -1.) costheta = -1.;
>> 452 if (costheta > +1.) costheta = +1.;
>> 453
>> 454 // direction of the delta electron
>> 455
>> 456 G4double phi = twopi * G4UniformRand();
>> 457 G4double sintheta = sqrt((1.+costheta)*(1.-costheta));
>> 458 G4double dirx = sintheta*cos(phi), diry = sintheta*sin(phi), dirz = costheta;
>> 459
>> 460 G4ThreeVector DeltaDirection(dirx,diry,dirz);
>> 461 DeltaDirection.rotateUz(ParticleDirection);
>> 462
>> 463 // create G4DynamicParticle object for delta ray
>> 464
>> 465 G4DynamicParticle* theDeltaRay = new G4DynamicParticle;
>> 466 theDeltaRay->SetKineticEnergy( DeltaKineticEnergy );
>> 467 theDeltaRay->SetMomentumDirection(
>> 468 DeltaDirection.x(),DeltaDirection.y(),DeltaDirection.z());
>> 469 theDeltaRay->SetDefinition(G4Electron::Electron());
>> 470
>> 471 // fill aParticleChange
>> 472 // changed energy and momentum of the actual particle
>> 473 G4double finalKineticEnergy = KineticEnergy - DeltaKineticEnergy;
>> 474
>> 475 G4double Edep = 0.;
>> 476
>> 477 if (finalKineticEnergy > MinKineticEnergy)
>> 478 {
>> 479 G4double finalPx = TotalMomentum*ParticleDirection.x()
>> 480 - DeltaTotalMomentum*DeltaDirection.x();
>> 481 G4double finalPy = TotalMomentum*ParticleDirection.y()
>> 482 - DeltaTotalMomentum*DeltaDirection.y();
>> 483 G4double finalPz = TotalMomentum*ParticleDirection.z()
>> 484 - DeltaTotalMomentum*DeltaDirection.z();
>> 485 G4double finalMomentum =
>> 486 sqrt(finalPx*finalPx+finalPy*finalPy+finalPz*finalPz);
>> 487 finalPx /= finalMomentum;
>> 488 finalPy /= finalMomentum;
>> 489 finalPz /= finalMomentum;
>> 490
>> 491 aParticleChange.SetMomentumChange(finalPx, finalPy, finalPz);
>> 492 }
>> 493 else
>> 494 {
>> 495 Edep = finalKineticEnergy;
>> 496 finalKineticEnergy = 0.;
>> 497 if (Charge < 0.) aParticleChange.SetStatusChange(fStopAndKill);
>> 498 else aParticleChange.SetStatusChange(fStopButAlive);
>> 499 }
>> 500
>> 501 aParticleChange.SetEnergyChange(finalKineticEnergy);
>> 502 aParticleChange.SetNumberOfSecondaries(1);
>> 503 aParticleChange.AddSecondary(theDeltaRay);
>> 504 aParticleChange.SetLocalEnergyDeposit(Edep);
>> 505
>> 506 return G4VContinuousDiscreteProcess::PostStepDoIt(trackData,stepData);
>> 507 }
>> 508
>> 509 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 510
>> 511 G4bool G4eIonisation::StorePhysicsTable(G4ParticleDefinition* particle,
>> 512 const G4String& directory,
>> 513 G4bool ascii)
>> 514 {
>> 515 G4String filename;
>> 516
>> 517 // store stopping power table
>> 518 filename = GetPhysicsTableFileName(particle,directory,"StoppingPower",ascii);
>> 519 if ( !theLossTable->StorePhysicsTable(filename, ascii) ){
>> 520 G4cout << " FAIL theLossTable->StorePhysicsTable in " << filename
>> 521 << G4endl;
>> 522 return false;
>> 523 }
>> 524 // store mean free path table
>> 525 filename = GetPhysicsTableFileName(particle,directory,"MeanFreePath",ascii);
>> 526 if ( !theMeanFreePathTable->StorePhysicsTable(filename, ascii) ){
>> 527 G4cout << " FAIL theMeanFreePathTable->StorePhysicsTable in " << filename
>> 528 << G4endl;
>> 529 return false;
>> 530 }
>> 531
>> 532 G4cout << GetProcessName() << " for " << particle->GetParticleName()
>> 533 << ": Success to store the PhysicsTables in "
>> 534 << directory << G4endl;
>> 535 return true;
>> 536 }
>> 537
>> 538 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 539
>> 540 G4bool G4eIonisation::RetrievePhysicsTable(G4ParticleDefinition* particle,
>> 541 const G4String& directory,
>> 542 G4bool ascii)
>> 543 {
>> 544 // delete theLossTable and theMeanFreePathTable
>> 545 if (theLossTable != 0) {
>> 546 theLossTable->clearAndDestroy();
>> 547 delete theLossTable;
>> 548 }
>> 549 if (theMeanFreePathTable != 0) {
>> 550 theMeanFreePathTable->clearAndDestroy();
>> 551 delete theMeanFreePathTable;
101 } 552 }
>> 553
>> 554 // get bining from EnergyLoss
>> 555 LowestKineticEnergy = GetLowerBoundEloss();
>> 556 HighestKineticEnergy = GetUpperBoundEloss();
>> 557 TotBin = GetNbinEloss();
>> 558
>> 559 G4String filename;
>> 560 const G4ProductionCutsTable* theCoupleTable=
>> 561 G4ProductionCutsTable::GetProductionCutsTable();
>> 562 size_t numOfCouples = theCoupleTable->GetTableSize();
>> 563
>> 564 secondaryEnergyCuts = theCoupleTable->GetEnergyCutsVector(1);
>> 565
>> 566 // retreive stopping power table
>> 567 filename = GetPhysicsTableFileName(particle,directory,"StoppingPower",ascii);
>> 568 theLossTable = new G4PhysicsTable(numOfCouples);
>> 569 if ( !theLossTable->RetrievePhysicsTable(filename, ascii) ){
>> 570 G4cout << " FAIL theLossTable->RetrievePhysicsTable in " << filename
>> 571 << G4endl;
>> 572 return false;
>> 573 }
>> 574
>> 575 // retreive mean free path table
>> 576 filename = GetPhysicsTableFileName(particle,directory,"MeanFreePath",ascii);
>> 577 theMeanFreePathTable = new G4PhysicsTable(numOfCouples);
>> 578 if ( !theMeanFreePathTable->RetrievePhysicsTable(filename, ascii) ){
>> 579 G4cout << " FAIL theMeanFreePathTable->RetrievePhysicsTable in " << filename
>> 580 << G4endl;
>> 581 return false;
>> 582 }
>> 583
>> 584 G4cout << GetProcessName() << " for " << particle->GetParticleName()
>> 585 << ": Success to retrieve the PhysicsTables from "
>> 586 << directory << G4endl;
>> 587
>> 588 if (particle==G4Electron::Electron())
>> 589 {
>> 590 RecorderOfElectronProcess[CounterOfElectronProcess] = (*this).theLossTable;
>> 591 CounterOfElectronProcess++;
>> 592 }
>> 593 else
>> 594 {
>> 595 RecorderOfPositronProcess[CounterOfPositronProcess] = (*this).theLossTable;
>> 596 CounterOfPositronProcess++;
>> 597 }
>> 598
>> 599 BuildDEDXTable(*particle);
>> 600 if (particle==G4Electron::Electron()) PrintInfoDefinition();
>> 601
>> 602 return true;
102 } 603 }
103 604
104 //....oooOO0OOooo........oooOO0OOooo........oo << 605 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
105 606
106 void G4eIonisation::ProcessDescription(std::os << 607 void G4eIonisation::PrintInfoDefinition()
107 { 608 {
108 out << " Ionisation"; << 609 G4String comments = "delta cross sections from Moller+Bhabha. "
109 G4VEnergyLossProcess::ProcessDescription(out << 610 "Good description from 1 KeV to 100 GeV.\n"
>> 611 " delta ray energy sampled from differential Xsection.";
>> 612
>> 613 G4cout << G4endl << GetProcessName() << ": " << comments
>> 614 << "\n PhysicsTables from "
>> 615 << G4BestUnit(LowerBoundLambda,"Energy")
>> 616 << " to " << G4BestUnit(UpperBoundLambda,"Energy")
>> 617 << " in " << NbinLambda << " bins."
>> 618 << "\n Step function: finalRange(mm)= " << finalRange
>> 619 << ", dRoverRange= " << dRoverRange
>> 620 << G4endl;
110 } 621 }
111 622
112 //....oooOO0OOooo........oooOO0OOooo........oo 623 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
113 624