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28 // GEANT4 Class file << 24 // $Id: G4eIonisation.cc,v 1.22 2001/11/09 13:59:47 maire Exp $
>> 25 // GEANT4 tag $Name: geant4-04-00 $
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 << 43 //------------------------------------------------------------------------------
>> 44
>> 45 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 46 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 47
44 #include "G4eIonisation.hh" 48 #include "G4eIonisation.hh"
45 #include "G4Electron.hh" << 49 #include "G4UnitsTable.hh"
46 #include "G4MollerBhabhaModel.hh" <<
47 #include "G4EmParameters.hh" <<
48 #include "G4EmStandUtil.hh" <<
49 50
50 //....oooOO0OOooo........oooOO0OOooo........oo << 51 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
51 52
52 G4eIonisation::G4eIonisation(const G4String& n << 53 G4double G4eIonisation::LowerBoundLambda = 1.*keV;
53 : G4VEnergyLossProcess(name), << 54 G4double G4eIonisation::UpperBoundLambda = 100.*TeV;
54 theElectron(G4Electron::Electron()), << 55 G4int G4eIonisation::NbinLambda = 100;
55 isElectron(true), << 56
56 isInitialised(false) << 57 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 58
>> 59 G4eIonisation::G4eIonisation(const G4String& processName)
>> 60 : G4VeEnergyLoss(processName),
>> 61 theMeanFreePathTable(NULL)
>> 62 { }
>> 63
>> 64 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 65
>> 66 G4eIonisation::~G4eIonisation()
57 { 67 {
58 SetProcessSubType(fIonisation); << 68 if (theMeanFreePathTable)
59 SetSecondaryParticle(theElectron); << 69 {theMeanFreePathTable->clearAndDestroy(); delete theMeanFreePathTable;}
>> 70 }
>> 71
>> 72 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 73
>> 74 void G4eIonisation::SetLowerBoundLambda(G4double val)
>> 75 {LowerBoundLambda = val;}
>> 76
>> 77 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 78
>> 79 void G4eIonisation::SetUpperBoundLambda(G4double val)
>> 80 {UpperBoundLambda = val;}
>> 81
>> 82 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 83
>> 84 void G4eIonisation::SetNbinLambda(G4int n)
>> 85 {NbinLambda = n;}
>> 86
>> 87 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 88
>> 89 G4double G4eIonisation::GetLowerBoundLambda()
>> 90 {return LowerBoundLambda;}
>> 91
>> 92 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 93
>> 94 G4double G4eIonisation::GetUpperBoundLambda()
>> 95 {return UpperBoundLambda;}
>> 96
>> 97 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 98
>> 99 G4int G4eIonisation::GetNbinLambda()
>> 100 {return NbinLambda;}
>> 101
>> 102 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 103
>> 104 void G4eIonisation::BuildPhysicsTable(const G4ParticleDefinition& aParticleType)
>> 105 // just call BuildLossTable+BuildLambdaTable
>> 106 {
>> 107 // get bining from EnergyLoss
>> 108 LowestKineticEnergy = GetLowerBoundEloss();
>> 109 HighestKineticEnergy = GetUpperBoundEloss();
>> 110 TotBin = GetNbinEloss();
>> 111
>> 112 BuildLossTable(aParticleType);
>> 113
>> 114 if (&aParticleType==G4Electron::Electron())
>> 115 {
>> 116 RecorderOfElectronProcess[CounterOfElectronProcess] = (*this).theLossTable;
>> 117 CounterOfElectronProcess++;
>> 118 }
>> 119 else
>> 120 {
>> 121 RecorderOfPositronProcess[CounterOfPositronProcess] = (*this).theLossTable;
>> 122 CounterOfPositronProcess++;
>> 123 }
>> 124
>> 125 BuildLambdaTable(aParticleType);
>> 126
>> 127 BuildDEDXTable(aParticleType);
>> 128
>> 129 if (&aParticleType==G4Electron::Electron()) PrintInfoDefinition();
>> 130 }
>> 131
>> 132 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 133
>> 134 void G4eIonisation::BuildLossTable(const G4ParticleDefinition& aParticleType)
>> 135 {
>> 136 // Build tables of dE/dx due to the ionization process
>> 137 // the tables are built for *MATERIALS*
>> 138
>> 139 // create table
>> 140 //
>> 141 const G4MaterialTable* theMaterialTable = G4Material::GetMaterialTable();
>> 142 G4int numOfMaterials = G4Material::GetNumberOfMaterials();
>> 143
>> 144 if (theLossTable) {theLossTable->clearAndDestroy(); delete theLossTable;}
>> 145 theLossTable = new G4PhysicsTable(numOfMaterials);
>> 146
>> 147 // get DeltaCut in energy
>> 148 G4double* DeltaCutInKineticEnergy = aParticleType.GetEnergyCuts();
>> 149
>> 150 // loop for materials
>> 151 //
>> 152 for (G4int J=0; J<numOfMaterials; J++)
>> 153 {
>> 154 // create physics vector and fill it
>> 155 G4PhysicsLogVector* aVector = new G4PhysicsLogVector(
>> 156 LowestKineticEnergy, HighestKineticEnergy, TotBin);
>> 157
>> 158 const G4Material* material = (*theMaterialTable)[J];
>> 159 G4double DeltaThreshold = DeltaCutInKineticEnergy[J];
>> 160
>> 161 // now comes the loop for the kinetic energy values
>> 162 //
>> 163 for (G4int i = 0; i < TotBin; i++)
>> 164 {
>> 165 G4double dEdx = ComputeRestrictedMeandEdx(aParticleType,
>> 166 aVector->GetLowEdgeEnergy(i),
>> 167 material,
>> 168 DeltaThreshold);
>> 169 aVector->PutValue(i,dEdx);
>> 170 }
>> 171 theLossTable->insert(aVector);
>> 172 }
60 } 173 }
61 174
62 //....oooOO0OOooo........oooOO0OOooo........oo << 175 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 176
>> 177 void G4eIonisation::BuildLambdaTable(const G4ParticleDefinition& aParticleType)
>> 178 {
>> 179 // Build mean free path tables for the delta ray production process
>> 180 // tables are built for MATERIALS
63 181
64 G4eIonisation::~G4eIonisation() = default; << 182 //create table
>> 183 //
>> 184 const G4MaterialTable* theMaterialTable=G4Material::GetMaterialTable();
>> 185 G4int numOfMaterials = G4Material::GetNumberOfMaterials();
>> 186
>> 187 if (theMeanFreePathTable)
>> 188 { theMeanFreePathTable->clearAndDestroy(); delete theMeanFreePathTable;}
>> 189
>> 190 theMeanFreePathTable = new G4PhysicsTable(numOfMaterials);
>> 191
>> 192 // get electron cuts in kinetic energy
>> 193 // The electron cuts needed in the case of the positron , too!
>> 194 // This is the reason why SetCut has to be called for electron first !!
>> 195
>> 196 if((G4Electron::Electron()->GetEnergyCuts() == 0) &&
>> 197 (&aParticleType == G4Positron::Positron()))
>> 198 {
>> 199 G4cout << " The ELECTRON energy cuts needed to compute energy loss"
>> 200 " and mean free path; and for POSITRON, too. " << G4endl;
>> 201 G4Exception(" Call SetCut for e- first !!");
>> 202 }
>> 203
>> 204 G4double* DeltaCutInKineticEnergy = G4Electron::Electron()->GetEnergyCuts() ;
>> 205
>> 206 // loop for materials
>> 207
>> 208 for (G4int J=0 ; J < numOfMaterials; J++)
>> 209 {
>> 210 //create physics vector then fill it ....
>> 211
>> 212 G4PhysicsLogVector* aVector = new G4PhysicsLogVector(
>> 213 LowerBoundLambda, UpperBoundLambda, NbinLambda);
>> 214
>> 215 // compute the (macroscopic) cross section first
>> 216
>> 217 const G4Material* material= (*theMaterialTable)[J];
>> 218 const G4ElementVector* theElementVector = material->GetElementVector();
>> 219 const G4double* NbOfAtomsPerVolume = material->GetVecNbOfAtomsPerVolume();
>> 220 G4int NumberOfElements = material->GetNumberOfElements();
>> 221
>> 222 // get the electron kinetic energy cut for the actual material,
>> 223 // it will be used in ComputeCrossSectionPerAtom
>> 224 // (--> it will be the same for all the elements in this material )
>> 225 G4double DeltaThreshold = DeltaCutInKineticEnergy[J];
>> 226
>> 227 for (G4int i = 0 ; i < NbinLambda ; i++)
>> 228 {
>> 229 G4double LowEdgeEnergy = aVector->GetLowEdgeEnergy(i);
>> 230 G4double SIGMA = 0.;
>> 231 for (G4int iel=0; iel<NumberOfElements; iel++ )
>> 232 {
>> 233 SIGMA += NbOfAtomsPerVolume[iel]*
>> 234 ComputeCrossSectionPerAtom(aParticleType,
>> 235 LowEdgeEnergy,
>> 236 (*theElementVector)[iel]->GetZ(),
>> 237 DeltaThreshold);
>> 238 }
>> 239
>> 240 // mean free path = 1./macroscopic cross section
>> 241 G4double Value = SIGMA > DBL_MIN ? 1./SIGMA : DBL_MAX;
>> 242 aVector->PutValue(i, Value);
>> 243 }
>> 244 theMeanFreePathTable->insert(aVector);
>> 245 }
>> 246 }
65 247
66 //....oooOO0OOooo........oooOO0OOooo........oo << 248 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
67 249
68 G4double G4eIonisation::MinPrimaryEnergy(const << 250 G4double G4eIonisation::ComputeRestrictedMeandEdx (
69 const G4Material*, << 251 const G4ParticleDefinition& aParticleType,
70 G4double cut) << 252 G4double KineticEnergy,
>> 253 const G4Material* material,
>> 254 G4double DeltaThreshold)
71 { 255 {
72 G4double x = cut; << 256 // calculate the dE/dx due to the ionization process (Geant4 internal units)
73 if(isElectron) x += cut; << 257 // Seltzer-Berger formula
74 return x; << 258 //
>> 259 G4double particleMass = aParticleType.GetPDGMass();
>> 260
>> 261 G4double ElectronDensity = material->GetElectronDensity();
>> 262 G4double Eexc = material->GetIonisation()->GetMeanExcitationEnergy();
>> 263 Eexc /= particleMass; G4double Eexcm2 = Eexc*Eexc;
>> 264
>> 265 // for the lowenergy extrapolation
>> 266 G4double Zeff = material->GetTotNbOfElectPerVolume()/
>> 267 material->GetTotNbOfAtomsPerVolume();
>> 268 G4double Th = 0.25*sqrt(Zeff)*keV;
>> 269 G4double Tsav = 0.;
>> 270 if (KineticEnergy < Th) {Tsav = KineticEnergy; KineticEnergy = Th;}
>> 271
>> 272 G4double tau = KineticEnergy/particleMass;
>> 273 G4double gamma = tau + 1., gamma2 = gamma*gamma, bg2 = tau*(tau+2.);
>> 274 G4double beta2 = bg2/gamma2;
>> 275
>> 276 G4double Tmax,d,dEdx;
>> 277
>> 278 // electron
>> 279 if (&aParticleType==G4Electron::Electron())
>> 280 {
>> 281 Tmax = KineticEnergy/2.;
>> 282 d = G4std::min(DeltaThreshold, Tmax)/particleMass;
>> 283 dEdx = log(2.*(tau+2.)/Eexcm2)-1.-beta2
>> 284 + log((tau-d)*d)+tau/(tau-d)
>> 285 + (0.5*d*d+(2.*tau+1.)*log(1.-d/tau))/gamma2;
>> 286 }
>> 287
>> 288 else //positron
>> 289 {
>> 290 Tmax = KineticEnergy;
>> 291 d = G4std::min(DeltaThreshold, Tmax)/particleMass;
>> 292 G4double d2=d*d/2., d3=d*d*d/3., d4=d*d*d*d/4.;
>> 293 G4double y=1./(1.+gamma);
>> 294 dEdx = log(2.*(tau+2.)/Eexcm2)+log(tau*d)
>> 295 - beta2*(tau+2.*d-y*(3.*d2+y*(d-d3+y*(d2-tau*d3+d4))))/tau;
>> 296 }
>> 297
>> 298 //density correction
>> 299 G4double Cden = material->GetIonisation()->GetCdensity();
>> 300 G4double Mden = material->GetIonisation()->GetMdensity();
>> 301 G4double Aden = material->GetIonisation()->GetAdensity();
>> 302 G4double X0den = material->GetIonisation()->GetX0density();
>> 303 G4double X1den = material->GetIonisation()->GetX1density();
>> 304
>> 305 const G4double twoln10 = 2.*log(10.);
>> 306 G4double x = log(bg2)/twoln10;
>> 307 G4double delta;
>> 308 if (x < X0den) delta = 0.;
>> 309 else {delta = twoln10*x - Cden;
>> 310 if (x < X1den) delta += Aden*pow((X1den-x),Mden);
>> 311 }
>> 312
>> 313 //now you can compute the total ionization loss
>> 314 dEdx -= delta;
>> 315 dEdx *= twopi_mc2_rcl2*ElectronDensity/beta2;
>> 316 if (dEdx <= 0.) dEdx = 0.;
>> 317
>> 318 // low energy ?
>> 319 const G4double Tl = 0.2*keV;
>> 320 if (Tsav > 0.)
>> 321 {
>> 322 if (Tsav >= Tl) dEdx *= sqrt(KineticEnergy/Tsav);
>> 323 else dEdx *= sqrt(KineticEnergy*Tsav)/Tl;
>> 324 }
>> 325 return dEdx;
75 } 326 }
76 327
77 //....oooOO0OOooo........oooOO0OOooo........oo << 328 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
78 329
79 G4bool G4eIonisation::IsApplicable(const G4Par << 330 G4double G4eIonisation::ComputeCrossSectionPerAtom(
>> 331 const G4ParticleDefinition& aParticleType,
>> 332 G4double KineticEnergy,
>> 333 G4double AtomicNumber ,
>> 334 G4double DeltaThreshold)
80 { 335 {
81 return (&p == theElectron || &p == G4Positro << 336 // calculates the cross section per atom (Geant4 internal units)
>> 337 //(it is called for elements , AtomicNumber = Z )
>> 338
>> 339 G4double particleMass = aParticleType.GetPDGMass();
>> 340 G4double TotalEnergy = KineticEnergy + particleMass;
>> 341
>> 342 G4double betasquare = KineticEnergy*(TotalEnergy+particleMass)
>> 343 /(TotalEnergy*TotalEnergy);
>> 344 G4double gamma = TotalEnergy/particleMass, gamma2 = gamma*gamma;
>> 345 G4double x=DeltaThreshold/KineticEnergy, x2 = x*x;
>> 346
>> 347 G4double MaxKineticEnergyTransfer;
>> 348 if (&aParticleType==G4Electron::Electron())
>> 349 MaxKineticEnergyTransfer = 0.5*KineticEnergy;
>> 350 else MaxKineticEnergyTransfer = KineticEnergy;
>> 351
>> 352 // now you can calculate the total cross section
>> 353 //
>> 354 G4double TotalCrossSection = 0.;
>> 355 if (MaxKineticEnergyTransfer > DeltaThreshold)
>> 356 {
>> 357 if (&aParticleType==G4Electron::Electron()) //Moller (e-e-) scattering
>> 358 {
>> 359 TotalCrossSection = (gamma-1.)*(gamma-1.)*(0.5-x)/gamma2 + 1./x
>> 360 - 1./(1.-x)-(2.*gamma-1.)*log((1.-x)/x)/gamma2;
>> 361 TotalCrossSection /= betasquare;
>> 362 }
>> 363 else //Bhabha (e+e-) scattering
>> 364 {
>> 365 G4double y=1./(1.+gamma), y2 =y*y, y12=1.-2.*y;
>> 366 G4double b1=2.-y2, b2=y12*(3.+y2), b4=y12*y12*y12, b3=b4+y12*y12;
>> 367 TotalCrossSection = (1./x-1.)/betasquare+b1*log(x)+b2*(1.-x)
>> 368 - b3*(1.-x2)/2.+b4*(1.-x2*x)/3.;
>> 369 }
>> 370 TotalCrossSection *= (twopi_mc2_rcl2*AtomicNumber/KineticEnergy);
>> 371 }
>> 372 return TotalCrossSection ;
82 } 373 }
83 374
84 //....oooOO0OOooo........oooOO0OOooo........oo << 375 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
85 376
86 void G4eIonisation::InitialiseEnergyLossProces << 377 G4VParticleChange* G4eIonisation::PostStepDoIt( const G4Track& trackData,
87 const G4ParticleDefinition* part, << 378 const G4Step& stepData)
88 const G4ParticleDefinition*) <<
89 { 379 {
90 if(!isInitialised) { << 380 aParticleChange.Initialize(trackData);
91 if(part != theElectron) { isElectron = fal << 381
92 if (nullptr == EmModel(0)) { SetEmModel(ne << 382 G4Material* aMaterial = trackData.GetMaterial();
93 G4EmParameters* param = G4EmParameters::In << 383 const G4DynamicParticle* aParticle = trackData.GetDynamicParticle();
94 EmModel(0)->SetLowEnergyLimit(param->MinKi << 384
95 EmModel(0)->SetHighEnergyLimit(param->MaxK << 385 G4double particleMass = aParticle->GetDefinition()->GetPDGMass();
96 if (nullptr == FluctModel()) { << 386 G4double Charge = aParticle->GetDefinition()->GetPDGCharge();
97 SetFluctModel(G4EmStandUtil::ModelOfFluc << 387 G4double KineticEnergy = aParticle->GetKineticEnergy();
>> 388 G4double TotalEnergy = KineticEnergy + particleMass;
>> 389 G4double Psquare = KineticEnergy*(TotalEnergy+particleMass);
>> 390 G4double TotalMomentum = sqrt(Psquare);
>> 391 G4ParticleMomentum ParticleDirection = aParticle->GetMomentumDirection();
>> 392
>> 393 // get kinetic energy cut for the electron
>> 394 G4double* DeltaCutInKineticEnergy = G4Electron::Electron()->GetEnergyCuts() ;
>> 395 G4double DeltaThreshold = DeltaCutInKineticEnergy[aMaterial->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);
98 } 425 }
99 AddEmModel(1, EmModel(), FluctModel()); << 426 else // Bhabha (e+e-) scattering
100 isInitialised = true; << 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);
>> 437 }
>> 438
>> 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;
101 } 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;
102 } 536 }
103 537
104 //....oooOO0OOooo........oooOO0OOooo........oo << 538 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
105 539
106 void G4eIonisation::ProcessDescription(std::os << 540 G4bool G4eIonisation::RetrievePhysicsTable(G4ParticleDefinition* particle,
>> 541 const G4String& directory,
>> 542 G4bool ascii)
107 { 543 {
108 out << " Ionisation"; << 544 // delete theLossTable and theMeanFreePathTable
109 G4VEnergyLossProcess::ProcessDescription(out << 545 if (theLossTable != 0) {
>> 546 theLossTable->clearAndDestroy();
>> 547 delete theLossTable;
>> 548 }
>> 549 if (theMeanFreePathTable != 0) {
>> 550 theMeanFreePathTable->clearAndDestroy();
>> 551 delete theMeanFreePathTable;
>> 552 }
>> 553
>> 554 // get bining from EnergyLoss
>> 555 LowestKineticEnergy = GetLowerBoundEloss();
>> 556 HighestKineticEnergy = GetUpperBoundEloss();
>> 557 TotBin = GetNbinEloss();
>> 558
>> 559 G4String filename;
>> 560
>> 561 // retreive stopping power table
>> 562 filename = GetPhysicsTableFileName(particle,directory,"StoppingPower",ascii);
>> 563 theLossTable = new G4PhysicsTable(G4Material::GetNumberOfMaterials());
>> 564 if ( !theLossTable->RetrievePhysicsTable(filename, ascii) ){
>> 565 G4cout << " FAIL theLossTable->RetrievePhysicsTable in " << filename
>> 566 << G4endl;
>> 567 return false;
>> 568 }
>> 569
>> 570 // retreive mean free path table
>> 571 filename = GetPhysicsTableFileName(particle,directory,"MeanFreePath",ascii);
>> 572 theMeanFreePathTable = new G4PhysicsTable(G4Material::GetNumberOfMaterials());
>> 573 if ( !theMeanFreePathTable->RetrievePhysicsTable(filename, ascii) ){
>> 574 G4cout << " FAIL theMeanFreePathTable->RetrievePhysicsTable in " << filename
>> 575 << G4endl;
>> 576 return false;
>> 577 }
>> 578
>> 579 G4cout << GetProcessName() << " for " << particle->GetParticleName()
>> 580 << ": Success to retrieve the PhysicsTables from "
>> 581 << directory << G4endl;
>> 582
>> 583 if (particle==G4Electron::Electron())
>> 584 {
>> 585 RecorderOfElectronProcess[CounterOfElectronProcess] = (*this).theLossTable;
>> 586 CounterOfElectronProcess++;
>> 587 }
>> 588 else
>> 589 {
>> 590 RecorderOfPositronProcess[CounterOfPositronProcess] = (*this).theLossTable;
>> 591 CounterOfPositronProcess++;
>> 592 }
>> 593
>> 594 BuildDEDXTable(*particle);
>> 595
>> 596 return true;
110 } 597 }
>> 598
>> 599 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 600
>> 601 void G4eIonisation::PrintInfoDefinition()
>> 602 {
>> 603 G4String comments = "delta cross sections from Moller+Bhabha. "
>> 604 "Good description from 1 KeV to 100 GeV.\n"
>> 605 " delta ray energy sampled from differential Xsection.";
>> 606
>> 607 G4cout << G4endl << GetProcessName() << ": " << comments
>> 608 << "\n PhysicsTables from "
>> 609 << G4BestUnit(LowerBoundLambda,"Energy")
>> 610 << " to " << G4BestUnit(UpperBoundLambda,"Energy")
>> 611 << " in " << NbinLambda << " bins. \n";
>> 612 }
111 613
112 //....oooOO0OOooo........oooOO0OOooo........oo 614 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
113 615