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28 // GEANT4 Class file << 24 // $Id: G4eIonisation.cc,v 1.31 2003/06/16 17:02:16 gunter Exp $
>> 25 // GEANT4 tag $Name: geant4-05-02-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 {
>> 68 verboseLevel = -1;
>> 69 }
>> 70
>> 71 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 72
>> 73 G4eIonisation::~G4eIonisation()
>> 74 {
>> 75 if (theMeanFreePathTable)
>> 76 {theMeanFreePathTable->clearAndDestroy(); delete theMeanFreePathTable;}
>> 77 }
>> 78
>> 79 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 80
>> 81 void G4eIonisation::SetLowerBoundLambda(G4double val)
>> 82 {LowerBoundLambda = val;}
>> 83
>> 84 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 85
>> 86 void G4eIonisation::SetUpperBoundLambda(G4double val)
>> 87 {UpperBoundLambda = val;}
49 88
50 //....oooOO0OOooo........oooOO0OOooo........oo << 89 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
51 90
52 G4eIonisation::G4eIonisation(const G4String& n << 91 void G4eIonisation::SetNbinLambda(G4int n)
53 : G4VEnergyLossProcess(name), << 92 {NbinLambda = n;}
54 theElectron(G4Electron::Electron()), << 93
55 isElectron(true), << 94 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
56 isInitialised(false) << 95
>> 96 G4double G4eIonisation::GetLowerBoundLambda()
>> 97 {return LowerBoundLambda;}
>> 98
>> 99 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 100
>> 101 G4double G4eIonisation::GetUpperBoundLambda()
>> 102 {return UpperBoundLambda;}
>> 103
>> 104 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 105
>> 106 G4int G4eIonisation::GetNbinLambda()
>> 107 {return NbinLambda;}
>> 108
>> 109 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 110
>> 111 void G4eIonisation::BuildPhysicsTable(const G4ParticleDefinition& aParticleType)
>> 112 {
>> 113 if( !CutsWhereModified() && theLossTable) return;
>> 114
>> 115 LowestKineticEnergy = GetLowerBoundEloss();
>> 116 HighestKineticEnergy = GetUpperBoundEloss();
>> 117 TotBin = GetNbinEloss();
>> 118
>> 119 BuildLossTable(aParticleType);
>> 120
>> 121 if (&aParticleType==G4Electron::Electron())
>> 122 {
>> 123 RecorderOfElectronProcess[CounterOfElectronProcess] = (*this).theLossTable;
>> 124 CounterOfElectronProcess++;
>> 125 }
>> 126 else
>> 127 {
>> 128 RecorderOfPositronProcess[CounterOfPositronProcess] = (*this).theLossTable;
>> 129 CounterOfPositronProcess++;
>> 130 }
>> 131
>> 132 BuildLambdaTable(aParticleType);
>> 133
>> 134 BuildDEDXTable(aParticleType);
>> 135
>> 136 if (&aParticleType==G4Electron::Electron()) PrintInfoDefinition();
>> 137 }
>> 138
>> 139 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 140
>> 141 void G4eIonisation::BuildLossTable(const G4ParticleDefinition& aParticleType)
57 { 142 {
58 SetProcessSubType(fIonisation); << 143
59 SetSecondaryParticle(theElectron); << 144 const G4ProductionCutsTable* theCoupleTable=
>> 145 G4ProductionCutsTable::GetProductionCutsTable();
>> 146 size_t numOfCouples = theCoupleTable->GetTableSize();
>> 147
>> 148 if (theLossTable) {theLossTable->clearAndDestroy(); delete theLossTable;}
>> 149 theLossTable = new G4PhysicsTable(numOfCouples);
>> 150
>> 151 secondaryEnergyCuts = theCoupleTable->GetEnergyCutsVector(1);
>> 152
>> 153 // loop for materials
>> 154 //
>> 155 for (size_t J=0; J<numOfCouples; J++)
>> 156 {
>> 157
>> 158 G4PhysicsLogVector* aVector = new G4PhysicsLogVector(
>> 159 LowestKineticEnergy, HighestKineticEnergy, TotBin);
>> 160
>> 161 const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(J);
>> 162 const G4Material* material= couple->GetMaterial();
>> 163
>> 164 // get electron cut in kinetic energy for the material
>> 165 G4double DeltaThreshold = SecondaryEnergyThreshold(J);
>> 166
>> 167
>> 168 // now comes the loop for the kinetic energy values
>> 169 //
>> 170 for (G4int i = 0; i < TotBin; i++)
>> 171 {
>> 172 G4double dEdx = ComputeRestrictedMeandEdx(aParticleType,
>> 173 aVector->GetLowEdgeEnergy(i),
>> 174 material,
>> 175 DeltaThreshold);
>> 176 if(1 < verboseLevel) {
>> 177 G4cout << "Material= " << material->GetName()
>> 178 << " E(MeV)= " << aVector->GetLowEdgeEnergy(i)/MeV
>> 179 << " dEdx(MeV/mm)= " << dEdx*mm/MeV
>> 180 << G4endl;
>> 181 }
>> 182 aVector->PutValue(i,dEdx);
>> 183 }
>> 184 theLossTable->insert(aVector);
>> 185 }
60 } 186 }
61 187
62 //....oooOO0OOooo........oooOO0OOooo........oo << 188 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
63 189
64 G4eIonisation::~G4eIonisation() = default; << 190 void G4eIonisation::BuildLambdaTable(const G4ParticleDefinition& aParticleType)
>> 191 {
>> 192
>> 193 if(0 < verboseLevel) {
>> 194 G4cout << "G4eIonisation::BuildLambdaTable() for process "
>> 195 << GetProcessName() << " and particle "
>> 196 << aParticleType.GetParticleName() << G4endl;
>> 197 }
>> 198
>> 199 //create table
>> 200 //
>> 201 const G4ProductionCutsTable* theCoupleTable=
>> 202 G4ProductionCutsTable::GetProductionCutsTable();
>> 203 size_t numOfCouples = theCoupleTable->GetTableSize();
>> 204
>> 205 if (theMeanFreePathTable)
>> 206 { theMeanFreePathTable->clearAndDestroy(); delete theMeanFreePathTable;}
>> 207
>> 208 theMeanFreePathTable = new G4PhysicsTable(numOfCouples);
>> 209
>> 210 secondaryEnergyCuts = theCoupleTable->GetEnergyCutsVector(1);
>> 211
>> 212 // loop for materials
>> 213
>> 214 for (size_t J=0 ; J < numOfCouples; J++)
>> 215 {
>> 216
>> 217 G4PhysicsLogVector* aVector = new G4PhysicsLogVector(
>> 218 LowerBoundLambda, UpperBoundLambda, NbinLambda);
>> 219
>> 220 // compute the (macroscopic) cross section first
>> 221 const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(J);
>> 222 const G4Material* material= couple->GetMaterial();
>> 223
>> 224 // get electron cut in kinetic energy for the material
>> 225 G4double DeltaThreshold = SecondaryEnergyThreshold(J);
>> 226
>> 227 const G4ElementVector* theElementVector = material->GetElementVector();
>> 228 const G4double* NbOfAtomsPerVolume = material->GetVecNbOfAtomsPerVolume();
>> 229 G4int NumberOfElements = material->GetNumberOfElements();
>> 230
>> 231 for (G4int i = 0 ; i < NbinLambda ; i++)
>> 232 {
>> 233 G4double LowEdgeEnergy = aVector->GetLowEdgeEnergy(i);
>> 234 G4double SIGMA = 0.;
>> 235 for (G4int iel=0; iel<NumberOfElements; iel++ )
>> 236 {
>> 237 SIGMA += NbOfAtomsPerVolume[iel]*
>> 238 ComputeCrossSectionPerAtom(aParticleType,
>> 239 LowEdgeEnergy,
>> 240 (*theElementVector)[iel]->GetZ(),
>> 241 DeltaThreshold);
>> 242 }
>> 243
>> 244 // mean free path = 1./macroscopic cross section
>> 245 G4double Value = SIGMA > DBL_MIN ? 1./SIGMA : DBL_MAX;
>> 246 aVector->PutValue(i, Value);
>> 247 }
>> 248 theMeanFreePathTable->insert(aVector);
>> 249 }
>> 250 }
65 251
66 //....oooOO0OOooo........oooOO0OOooo........oo << 252 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
67 253
68 G4double G4eIonisation::MinPrimaryEnergy(const << 254 G4double G4eIonisation::ComputeRestrictedMeandEdx (
69 const G4Material*, << 255 const G4ParticleDefinition& aParticleType,
70 G4double cut) << 256 G4double KineticEnergy,
>> 257 const G4Material* material,
>> 258 G4double DeltaThreshold)
71 { 259 {
72 G4double x = cut; << 260 // calculate the dE/dx due to the ionization process (Geant4 internal units)
73 if(isElectron) x += cut; << 261 // Seltzer-Berger formula
74 return x; << 262 //
>> 263 G4double particleMass = aParticleType.GetPDGMass();
>> 264
>> 265 G4double ElectronDensity = material->GetElectronDensity();
>> 266 G4double Eexc = material->GetIonisation()->GetMeanExcitationEnergy();
>> 267 Eexc /= particleMass; G4double Eexcm2 = Eexc*Eexc;
>> 268
>> 269 // for the lowenergy extrapolation
>> 270 G4double Zeff = material->GetTotNbOfElectPerVolume()/
>> 271 material->GetTotNbOfAtomsPerVolume();
>> 272 G4double Th = 0.25*sqrt(Zeff)*keV;
>> 273 G4double Tsav = 0.;
>> 274 if (KineticEnergy < Th) {Tsav = KineticEnergy; KineticEnergy = Th;}
>> 275
>> 276 G4double tau = KineticEnergy/particleMass;
>> 277 G4double gamma = tau + 1., gamma2 = gamma*gamma, bg2 = tau*(tau+2.);
>> 278 G4double beta2 = bg2/gamma2;
>> 279
>> 280 G4double Tmax,d,dEdx;
>> 281
>> 282 // electron
>> 283 if (&aParticleType==G4Electron::Electron())
>> 284 {
>> 285 Tmax = KineticEnergy/2.;
>> 286 d = std::min(DeltaThreshold, Tmax)/particleMass;
>> 287 dEdx = log(2.*(tau+2.)/Eexcm2)-1.-beta2
>> 288 + log((tau-d)*d)+tau/(tau-d)
>> 289 + (0.5*d*d+(2.*tau+1.)*log(1.-d/tau))/gamma2;
>> 290 }
>> 291
>> 292 else //positron
>> 293 {
>> 294 Tmax = KineticEnergy;
>> 295 d = std::min(DeltaThreshold, Tmax)/particleMass;
>> 296 G4double d2=d*d/2., d3=d*d*d/3., d4=d*d*d*d/4.;
>> 297 G4double y=1./(1.+gamma);
>> 298 dEdx = log(2.*(tau+2.)/Eexcm2)+log(tau*d)
>> 299 - beta2*(tau+2.*d-y*(3.*d2+y*(d-d3+y*(d2-tau*d3+d4))))/tau;
>> 300 }
>> 301
>> 302 //density correction
>> 303 G4double Cden = material->GetIonisation()->GetCdensity();
>> 304 G4double Mden = material->GetIonisation()->GetMdensity();
>> 305 G4double Aden = material->GetIonisation()->GetAdensity();
>> 306 G4double X0den = material->GetIonisation()->GetX0density();
>> 307 G4double X1den = material->GetIonisation()->GetX1density();
>> 308
>> 309 const G4double twoln10 = 2.*log(10.);
>> 310 G4double x = log(bg2)/twoln10;
>> 311 G4double delta;
>> 312 if (x < X0den) delta = 0.;
>> 313 else {delta = twoln10*x - Cden;
>> 314 if (x < X1den) delta += Aden*pow((X1den-x),Mden);
>> 315 }
>> 316
>> 317 //now you can compute the total ionization loss
>> 318 dEdx -= delta;
>> 319 dEdx *= twopi_mc2_rcl2*ElectronDensity/beta2;
>> 320 if (dEdx <= 0.) dEdx = 0.;
>> 321
>> 322 // low energy ?
>> 323 const G4double Tl = 0.2*keV;
>> 324 if (Tsav > 0.)
>> 325 {
>> 326 if (Tsav >= Tl) dEdx *= sqrt(KineticEnergy/Tsav);
>> 327 else dEdx *= sqrt(KineticEnergy*Tsav)/Tl;
>> 328 }
>> 329 return dEdx;
75 } 330 }
76 331
77 //....oooOO0OOooo........oooOO0OOooo........oo << 332 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
78 333
79 G4bool G4eIonisation::IsApplicable(const G4Par << 334 G4double G4eIonisation::ComputeCrossSectionPerAtom(
>> 335 const G4ParticleDefinition& aParticleType,
>> 336 G4double KineticEnergy,
>> 337 G4double AtomicNumber ,
>> 338 G4double DeltaThreshold)
80 { 339 {
81 return (&p == theElectron || &p == G4Positro << 340 // calculates the cross section per atom (Geant4 internal units)
>> 341 //(it is called for elements , AtomicNumber = Z )
>> 342
>> 343 G4double particleMass = aParticleType.GetPDGMass();
>> 344 G4double TotalEnergy = KineticEnergy + particleMass;
>> 345
>> 346 G4double betasquare = KineticEnergy*(TotalEnergy+particleMass)
>> 347 /(TotalEnergy*TotalEnergy);
>> 348 G4double gamma = TotalEnergy/particleMass, gamma2 = gamma*gamma;
>> 349 G4double x=DeltaThreshold/KineticEnergy, x2 = x*x;
>> 350
>> 351 G4double MaxKineticEnergyTransfer;
>> 352 if (&aParticleType==G4Electron::Electron())
>> 353 MaxKineticEnergyTransfer = 0.5*KineticEnergy;
>> 354 else MaxKineticEnergyTransfer = KineticEnergy;
>> 355
>> 356
>> 357 G4double TotalCrossSection = 0.;
>> 358 if (MaxKineticEnergyTransfer > DeltaThreshold)
>> 359 {
>> 360 if (&aParticleType==G4Electron::Electron()) //Moller (e-e-) scattering
>> 361 {
>> 362 TotalCrossSection = (gamma-1.)*(gamma-1.)*(0.5-x)/gamma2 + 1./x
>> 363 - 1./(1.-x)-(2.*gamma-1.)*log((1.-x)/x)/gamma2;
>> 364 TotalCrossSection /= betasquare;
>> 365 }
>> 366 else //Bhabha (e+e-) scattering
>> 367 {
>> 368 G4double y=1./(1.+gamma), y2 =y*y, y12=1.-2.*y;
>> 369 G4double b1=2.-y2, b2=y12*(3.+y2), b4=y12*y12*y12, b3=b4+y12*y12;
>> 370 TotalCrossSection = (1./x-1.)/betasquare+b1*log(x)+b2*(1.-x)
>> 371 - b3*(1.-x2)/2.+b4*(1.-x2*x)/3.;
>> 372 }
>> 373 TotalCrossSection *= (twopi_mc2_rcl2*AtomicNumber/KineticEnergy);
>> 374 }
>> 375 return TotalCrossSection ;
82 } 376 }
83 377
84 //....oooOO0OOooo........oooOO0OOooo........oo << 378 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
85 379
86 void G4eIonisation::InitialiseEnergyLossProces << 380 G4VParticleChange* G4eIonisation::PostStepDoIt( const G4Track& trackData,
87 const G4ParticleDefinition* part, << 381 const G4Step& stepData)
88 const G4ParticleDefinition*) <<
89 { 382 {
90 if(!isInitialised) { << 383 aParticleChange.Initialize(trackData);
91 if(part != theElectron) { isElectron = fal << 384
92 if (nullptr == EmModel(0)) { SetEmModel(ne << 385 const G4MaterialCutsCouple* couple = trackData.GetMaterialCutsCouple();
93 G4EmParameters* param = G4EmParameters::In << 386 const G4DynamicParticle* aParticle = trackData.GetDynamicParticle();
94 EmModel(0)->SetLowEnergyLimit(param->MinKi << 387
95 EmModel(0)->SetHighEnergyLimit(param->MaxK << 388 G4double particleMass = aParticle->GetDefinition()->GetPDGMass();
96 if (nullptr == FluctModel()) { << 389 G4double Charge = aParticle->GetDefinition()->GetPDGCharge();
97 SetFluctModel(G4EmStandUtil::ModelOfFluc << 390 G4double KineticEnergy = aParticle->GetKineticEnergy();
>> 391 G4double TotalEnergy = KineticEnergy + particleMass;
>> 392 G4double Psquare = KineticEnergy*(TotalEnergy+particleMass);
>> 393 G4double TotalMomentum = sqrt(Psquare);
>> 394 G4ParticleMomentum ParticleDirection = aParticle->GetMomentumDirection();
>> 395
>> 396 // get kinetic energy cut for the electron
>> 397 G4double DeltaThreshold = SecondaryEnergyThreshold(couple->GetIndex());
>> 398
>> 399 // some kinematics
>> 400 G4double MaxKineticEnergyTransfer;
>> 401 if (Charge < 0.) MaxKineticEnergyTransfer = 0.5*KineticEnergy;
>> 402 else MaxKineticEnergyTransfer = KineticEnergy;
>> 403
>> 404 // sampling kinetic energy of the delta ray
>> 405
>> 406 if (MaxKineticEnergyTransfer <= DeltaThreshold)
>> 407 // pathological case (should not happen, there is no change at all)
>> 408 return G4VContinuousDiscreteProcess::PostStepDoIt(trackData,stepData);
>> 409
>> 410
>> 411 // normal case
>> 412 G4double cc,y,y2,c2,b0,b1,b2,b3,b4,x,x1,grej,grejc;
>> 413
>> 414 G4double tau = KineticEnergy/particleMass;
>> 415 G4double gamma = tau+1., gamma2=gamma*gamma;
>> 416 G4double xc = DeltaThreshold/KineticEnergy, xc1=1.-xc;
>> 417
>> 418 if (Charge < 0.) // Moller (e-e-) scattering
>> 419 {
>> 420 b1=4./(9.*gamma2-10.*gamma+5.);
>> 421 b2=tau*tau*b1; b3=(2.*gamma2+2.*gamma-1.)*b1;
>> 422 cc=1.-2.*xc;
>> 423 do {
>> 424 x = xc/(1.-cc*G4UniformRand()); x1 = 1.-x;
>> 425 grej = b2*x*x-b3*x/x1+b1*gamma2/(x1*x1);
>> 426 } while (G4UniformRand()>grej);
98 } 427 }
99 AddEmModel(1, EmModel(), FluctModel()); << 428 else // Bhabha (e+e-) scattering
100 isInitialised = true; << 429 {
>> 430 y=1./(gamma+1.); y2=y*y; cc=1.-2.*y;
>> 431 b1=2.-y2; b2=cc*(3.+y2);
>> 432 c2=cc*cc; b4=c2*cc; b3=c2+b4;
>> 433 b0=gamma2/(gamma2-1.);
>> 434 grejc=(((b4*xc-b3)*xc+b2)*xc-b1)*xc+b0;
>> 435 do {
>> 436 x = xc/(1.-xc1*G4UniformRand());
>> 437 grej = ((((b4*x-b3)*x+b2)*x-b1)*x+b0)/grejc;
>> 438 } while (G4UniformRand()>grej);
>> 439 }
>> 440
>> 441 G4double DeltaKineticEnergy = x * KineticEnergy;
>> 442
>> 443 // protection :do not produce a secondary with 0. kinetic energy !
>> 444 if (DeltaKineticEnergy <= 0.)
>> 445 return G4VContinuousDiscreteProcess::PostStepDoIt(trackData,stepData);
>> 446
>> 447 G4double DeltaTotalMomentum = sqrt(DeltaKineticEnergy*(DeltaKineticEnergy +
>> 448 2.*electron_mass_c2 ));
>> 449
>> 450 G4double costheta = DeltaKineticEnergy * (TotalEnergy + electron_mass_c2)
>> 451 /(DeltaTotalMomentum * TotalMomentum);
>> 452
>> 453 if (costheta < -1.) costheta = -1.;
>> 454 if (costheta > +1.) costheta = +1.;
>> 455
>> 456 // direction of the delta electron
>> 457
>> 458 G4double phi = twopi * G4UniformRand();
>> 459 G4double sintheta = sqrt((1.+costheta)*(1.-costheta));
>> 460 G4double dirx = sintheta*cos(phi), diry = sintheta*sin(phi), dirz = costheta;
>> 461
>> 462 G4ThreeVector DeltaDirection(dirx,diry,dirz);
>> 463 DeltaDirection.rotateUz(ParticleDirection);
>> 464
>> 465 // create G4DynamicParticle object for delta ray
>> 466
>> 467 G4DynamicParticle* theDeltaRay = new G4DynamicParticle;
>> 468 theDeltaRay->SetKineticEnergy( DeltaKineticEnergy );
>> 469 theDeltaRay->SetMomentumDirection(
>> 470 DeltaDirection.x(),DeltaDirection.y(),DeltaDirection.z());
>> 471 theDeltaRay->SetDefinition(G4Electron::Electron());
>> 472
>> 473 // fill aParticleChange
>> 474 // changed energy and momentum of the actual particle
>> 475 G4double finalKineticEnergy = KineticEnergy - DeltaKineticEnergy;
>> 476
>> 477 G4double Edep = 0.;
>> 478
>> 479 if (finalKineticEnergy > MinKineticEnergy)
>> 480 {
>> 481 G4double finalPx = TotalMomentum*ParticleDirection.x()
>> 482 - DeltaTotalMomentum*DeltaDirection.x();
>> 483 G4double finalPy = TotalMomentum*ParticleDirection.y()
>> 484 - DeltaTotalMomentum*DeltaDirection.y();
>> 485 G4double finalPz = TotalMomentum*ParticleDirection.z()
>> 486 - DeltaTotalMomentum*DeltaDirection.z();
>> 487 G4double finalMomentum =
>> 488 sqrt(finalPx*finalPx+finalPy*finalPy+finalPz*finalPz);
>> 489 finalPx /= finalMomentum;
>> 490 finalPy /= finalMomentum;
>> 491 finalPz /= finalMomentum;
>> 492
>> 493 aParticleChange.SetMomentumChange(finalPx, finalPy, finalPz);
>> 494 }
>> 495 else
>> 496 {
>> 497 Edep = finalKineticEnergy;
>> 498 finalKineticEnergy = 0.;
>> 499 if (Charge < 0.) aParticleChange.SetStatusChange(fStopAndKill);
>> 500 else aParticleChange.SetStatusChange(fStopButAlive);
>> 501 }
>> 502
>> 503 aParticleChange.SetEnergyChange(finalKineticEnergy);
>> 504 aParticleChange.SetNumberOfSecondaries(1);
>> 505 aParticleChange.AddSecondary(theDeltaRay);
>> 506 aParticleChange.SetLocalEnergyDeposit(Edep);
>> 507
>> 508 return G4VContinuousDiscreteProcess::PostStepDoIt(trackData,stepData);
>> 509 }
>> 510
>> 511 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 512
>> 513 G4bool G4eIonisation::StorePhysicsTable(G4ParticleDefinition* particle,
>> 514 const G4String& directory,
>> 515 G4bool ascii)
>> 516 {
>> 517 G4String filename;
>> 518
>> 519 // store stopping power table
>> 520 filename = GetPhysicsTableFileName(particle,directory,"StoppingPower",ascii);
>> 521 if ( !theLossTable->StorePhysicsTable(filename, ascii) ){
>> 522 G4cout << " FAIL theLossTable->StorePhysicsTable in " << filename
>> 523 << G4endl;
>> 524 return false;
>> 525 }
>> 526 // store mean free path table
>> 527 filename = GetPhysicsTableFileName(particle,directory,"MeanFreePath",ascii);
>> 528 if ( !theMeanFreePathTable->StorePhysicsTable(filename, ascii) ){
>> 529 G4cout << " FAIL theMeanFreePathTable->StorePhysicsTable in " << filename
>> 530 << G4endl;
>> 531 return false;
>> 532 }
>> 533
>> 534 G4cout << GetProcessName() << " for " << particle->GetParticleName()
>> 535 << ": Success to store the PhysicsTables in "
>> 536 << directory << G4endl;
>> 537 return true;
>> 538 }
>> 539
>> 540 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 541
>> 542 G4bool G4eIonisation::RetrievePhysicsTable(G4ParticleDefinition* particle,
>> 543 const G4String& directory,
>> 544 G4bool ascii)
>> 545 {
>> 546 // delete theLossTable and theMeanFreePathTable
>> 547 if (theLossTable != 0) {
>> 548 theLossTable->clearAndDestroy();
>> 549 delete theLossTable;
101 } 550 }
>> 551 if (theMeanFreePathTable != 0) {
>> 552 theMeanFreePathTable->clearAndDestroy();
>> 553 delete theMeanFreePathTable;
>> 554 }
>> 555
>> 556 // get bining from EnergyLoss
>> 557 LowestKineticEnergy = GetLowerBoundEloss();
>> 558 HighestKineticEnergy = GetUpperBoundEloss();
>> 559 TotBin = GetNbinEloss();
>> 560
>> 561 G4String filename;
>> 562 const G4ProductionCutsTable* theCoupleTable=
>> 563 G4ProductionCutsTable::GetProductionCutsTable();
>> 564 size_t numOfCouples = theCoupleTable->GetTableSize();
>> 565
>> 566 secondaryEnergyCuts = theCoupleTable->GetEnergyCutsVector(1);
>> 567
>> 568 // retreive stopping power table
>> 569 filename = GetPhysicsTableFileName(particle,directory,"StoppingPower",ascii);
>> 570 theLossTable = new G4PhysicsTable(numOfCouples);
>> 571 if ( !theLossTable->RetrievePhysicsTable(filename, ascii) ){
>> 572 G4cout << " FAIL theLossTable->RetrievePhysicsTable in " << filename
>> 573 << G4endl;
>> 574 return false;
>> 575 }
>> 576
>> 577 // retreive mean free path table
>> 578 filename = GetPhysicsTableFileName(particle,directory,"MeanFreePath",ascii);
>> 579 theMeanFreePathTable = new G4PhysicsTable(numOfCouples);
>> 580 if ( !theMeanFreePathTable->RetrievePhysicsTable(filename, ascii) ){
>> 581 G4cout << " FAIL theMeanFreePathTable->RetrievePhysicsTable in " << filename
>> 582 << G4endl;
>> 583 return false;
>> 584 }
>> 585
>> 586 G4cout << GetProcessName() << " for " << particle->GetParticleName()
>> 587 << ": Success to retrieve the PhysicsTables from "
>> 588 << directory << G4endl;
>> 589
>> 590 if (particle==G4Electron::Electron())
>> 591 {
>> 592 RecorderOfElectronProcess[CounterOfElectronProcess] = (*this).theLossTable;
>> 593 CounterOfElectronProcess++;
>> 594 }
>> 595 else
>> 596 {
>> 597 RecorderOfPositronProcess[CounterOfPositronProcess] = (*this).theLossTable;
>> 598 CounterOfPositronProcess++;
>> 599 }
>> 600
>> 601 BuildDEDXTable(*particle);
>> 602 if (particle==G4Electron::Electron()) PrintInfoDefinition();
>> 603
>> 604 return true;
102 } 605 }
103 606
104 //....oooOO0OOooo........oooOO0OOooo........oo << 607 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
105 608
106 void G4eIonisation::ProcessDescription(std::os << 609 void G4eIonisation::PrintInfoDefinition()
107 { 610 {
108 out << " Ionisation"; << 611 G4String comments = "delta cross sections from Moller+Bhabha. "
109 G4VEnergyLossProcess::ProcessDescription(out << 612 "Good description from 1 KeV to 100 GeV.\n"
>> 613 " delta ray energy sampled from differential Xsection.";
>> 614
>> 615 G4cout << G4endl << GetProcessName() << ": " << comments
>> 616 << "\n PhysicsTables from "
>> 617 << G4BestUnit(LowerBoundLambda,"Energy")
>> 618 << " to " << G4BestUnit(UpperBoundLambda,"Energy")
>> 619 << " in " << NbinLambda << " bins."
>> 620 << "\n Step function: finalRange(mm)= " << finalRange
>> 621 << ", dRoverRange= " << dRoverRange
>> 622 << G4endl;
110 } 623 }
111 624
112 //....oooOO0OOooo........oooOO0OOooo........oo 625 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
113 626