| Geant4 Cross Reference |
>> 1 // This code implementation is the intellectual property of
>> 2 // the GEANT4 collaboration.
1 // 3 //
2 // ******************************************* << 4 // By copying, distributing or modifying the Program (or any work
3 // * License and Disclaimer << 5 // based on the Program) you indicate your acceptance of this statement,
4 // * << 6 // and all its terms.
5 // * The Geant4 software is copyright of th <<
6 // * the Geant4 Collaboration. It is provided <<
7 // * conditions of the Geant4 Software License <<
8 // * LICENSE and available at http://cern.ch/ <<
9 // * include a list of copyright holders. <<
10 // * <<
11 // * Neither the authors of this software syst <<
12 // * institutes,nor the agencies providing fin <<
13 // * work make any representation or warran <<
14 // * regarding this software system or assum <<
15 // * use. Please see the license in the file <<
16 // * for the full disclaimer and the limitatio <<
17 // * <<
18 // * This code implementation is the result <<
19 // * technical work of the GEANT4 collaboratio <<
20 // * By using, copying, modifying or distri <<
21 // * any work based on the software) you ag <<
22 // * use in resulting scientific publicati <<
23 // * acceptance of all terms of the Geant4 Sof <<
24 // ******************************************* <<
25 // 7 //
26 // ------------------------------------------- << 8 // $Id: G4eIonisation.cc,v 1.10 2000/05/23 14:42:21 urban Exp $
>> 9 // GEANT4 tag $Name: geant4-03-00 $
27 // 10 //
28 // GEANT4 Class file << 11 //
>> 12 // -------------------------------------------------------------
>> 13 // GEANT 4 class implementation file
29 // 14 //
>> 15 // For information related to this code contact:
>> 16 // CERN, IT Division, ASD group
>> 17 // History: based on object model of
>> 18 // 2nd December 1995, G.Cosmo
>> 19 // ---------- G4eIonisation physics process -----------
>> 20 // by Laszlo Urban, 20 March 1997
>> 21 // **************************************************************
>> 22 // It is the first implementation of the NEW IONISATION PROCESS.
>> 23 // It calculates the ionisation of e+/e-.
>> 24 // **************************************************************
30 // 25 //
31 // File name: G4eIonisation << 26 // 07-04-98: remove 'tracking cut' of the ionizing particle, MMa
32 // << 27 // 04-09-98: new methods SetBining() PrintInfo()
33 // Author: Laszlo Urban << 28 // 07-09-98: Cleanup
34 // << 29 // 02/02/99: correction inDoIt , L.Urban
35 // Creation date: 20.03.1997 << 30 // 10/02/00 modifications , new e.m. structure, L.Urban
36 // << 31 // --------------------------------------------------------------
37 // Modified by Michel Maire and Vladimir Ivanc << 32
38 // <<
39 // ------------------------------------------- <<
40 // <<
41 //....oooOO0OOooo........oooOO0OOooo........oo <<
42 //....oooOO0OOooo........oooOO0OOooo........oo <<
43 <<
44 #include "G4eIonisation.hh" 33 #include "G4eIonisation.hh"
45 #include "G4Electron.hh" << 34 #include "G4EnergyLossTables.hh"
46 #include "G4MollerBhabhaModel.hh" << 35 #include "G4ios.hh"
47 #include "G4EmParameters.hh" << 36 #include "G4UnitsTable.hh"
48 #include "G4EmStandUtil.hh" << 37
>> 38 G4double G4eIonisation::LowerBoundLambda = 1.*keV ;
>> 39 G4double G4eIonisation::UpperBoundLambda = 100.*TeV ;
>> 40 G4int G4eIonisation::NbinLambda = 100 ;
>> 41
>> 42 // constructor and destructor
>> 43
>> 44 G4eIonisation::G4eIonisation(const G4String& processName)
>> 45 : G4VeEnergyLoss(processName),
>> 46 theMeanFreePathTable(NULL)
>> 47 { }
49 48
50 //....oooOO0OOooo........oooOO0OOooo........oo 49 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
51 50
52 G4eIonisation::G4eIonisation(const G4String& n << 51 G4eIonisation::~G4eIonisation()
53 : G4VEnergyLossProcess(name), <<
54 theElectron(G4Electron::Electron()), <<
55 isElectron(true), <<
56 isInitialised(false) <<
57 { 52 {
58 SetProcessSubType(fIonisation); << 53 if (theMeanFreePathTable) {
59 SetSecondaryParticle(theElectron); << 54 theMeanFreePathTable->clearAndDestroy();
>> 55 delete theMeanFreePathTable;
>> 56 }
>> 57
60 } 58 }
61 59
62 //....oooOO0OOooo........oooOO0OOooo........oo 60 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
63 61
64 G4eIonisation::~G4eIonisation() = default; << 62 void G4eIonisation::BuildPhysicsTable(const G4ParticleDefinition& aParticleType)
>> 63 // just call BuildLossTable+BuildLambdaTable
>> 64 {
>> 65 // get bining from EnergyLoss
>> 66 LowestKineticEnergy = GetLowerBoundEloss() ;
>> 67 HighestKineticEnergy = GetUpperBoundEloss() ;
>> 68 TotBin = GetNbinEloss() ;
>> 69
>> 70 BuildLossTable(aParticleType) ;
>> 71
>> 72 if(&aParticleType==G4Electron::Electron())
>> 73 {
>> 74 RecorderOfElectronProcess[CounterOfElectronProcess] = (*this).theLossTable ;
>> 75 CounterOfElectronProcess++;
>> 76 }
>> 77 else
>> 78 {
>> 79 RecorderOfPositronProcess[CounterOfPositronProcess] = (*this).theLossTable ;
>> 80 CounterOfPositronProcess++;
>> 81 }
>> 82
>> 83 BuildLambdaTable(aParticleType) ;
>> 84
>> 85 BuildDEDXTable(aParticleType) ;
>> 86
>> 87 if(&aParticleType==G4Electron::Electron())
>> 88 PrintInfoDefinition();
>> 89 }
65 90
66 //....oooOO0OOooo........oooOO0OOooo........oo 91 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
67 92
68 G4double G4eIonisation::MinPrimaryEnergy(const << 93 void G4eIonisation::BuildLossTable(const G4ParticleDefinition& aParticleType)
69 const G4Material*, <<
70 G4double cut) <<
71 { 94 {
72 G4double x = cut; << 95 // Build tables for the ionization energy loss
73 if(isElectron) x += cut; << 96 // the tables are built for *MATERIALS*
74 return x; << 97
>> 98 const G4double twoln10 = 2.*log(10.);
>> 99 const G4double Factor = twopi_mc2_rcl2;
>> 100
>> 101 static const G4double Tl = 0.2*keV ;
>> 102
>> 103 G4double LowEdgeEnergy, ionloss;
>> 104
>> 105 // material properties
>> 106 G4double ElectronDensity,Eexc,Eexcm2,Cden,Mden,Aden,X0den,X1den ;
>> 107 // some local variables
>> 108 G4double tau,Tmax,gamma,gamma2,bg2,beta2,d,d2,d3,d4,delta,x,y ;
>> 109
>> 110 ParticleMass = aParticleType.GetPDGMass();
>> 111 G4double* ParticleCutInKineticEnergy = aParticleType.GetEnergyCuts() ;
>> 112
>> 113 // create table
>> 114
>> 115 const G4MaterialTable* theMaterialTable = G4Material::GetMaterialTable();
>> 116 G4int numOfMaterials = theMaterialTable->length();
>> 117
>> 118 if (theLossTable) { theLossTable->clearAndDestroy();
>> 119 delete theLossTable;
>> 120 }
>> 121
>> 122 theLossTable = new G4PhysicsTable(numOfMaterials);
>> 123
>> 124 // loop for materials
>> 125
>> 126 for (G4int J=0; J<numOfMaterials; J++)
>> 127 {
>> 128 // create physics vector and fill it
>> 129
>> 130 G4PhysicsLogVector* aVector = new G4PhysicsLogVector(
>> 131 LowestKineticEnergy, HighestKineticEnergy, TotBin);
>> 132
>> 133 // get material parameters needed for the energy loss calculation
>> 134 const G4Material* material= (*theMaterialTable)[J];
>> 135
>> 136 ElectronDensity = material->GetElectronDensity();
>> 137 Eexc = material->GetIonisation()->GetMeanExcitationEnergy();
>> 138 Eexc /= ParticleMass; Eexcm2 = Eexc*Eexc;
>> 139 Cden = material->GetIonisation()->GetCdensity();
>> 140 Mden = material->GetIonisation()->GetMdensity();
>> 141 Aden = material->GetIonisation()->GetAdensity();
>> 142 X0den = material->GetIonisation()->GetX0density();
>> 143 X1den = material->GetIonisation()->GetX1density();
>> 144
>> 145 // for the lowenergy extrapolation
>> 146 G4double Zeff = material->GetTotNbOfElectPerVolume()/
>> 147 material->GetTotNbOfAtomsPerVolume() ;
>> 148 G4double Th = 0.25*sqrt(Zeff)*keV ;
>> 149
>> 150 G4double Tsav ;
>> 151
>> 152 // now comes the loop for the kinetic energy values
>> 153
>> 154 for (G4int i = 0 ; i < TotBin ; i++)
>> 155 {
>> 156 LowEdgeEnergy = aVector->GetLowEdgeEnergy(i) ;
>> 157 // low energy ?
>> 158 if(LowEdgeEnergy < Th)
>> 159 {
>> 160 Tsav = LowEdgeEnergy ;
>> 161 LowEdgeEnergy = Th ;
>> 162 }
>> 163 else
>> 164 Tsav = 0. ;
>> 165
>> 166 tau = LowEdgeEnergy/ParticleMass ;
>> 167
>> 168 // Seltzer-Berger formula
>> 169 gamma = tau + 1.; gamma2 = gamma*gamma;
>> 170 bg2 = tau*(tau+2.);
>> 171 beta2 = bg2/gamma2;
>> 172
>> 173 // electron
>> 174 if (&aParticleType==G4Electron::Electron())
>> 175 {
>> 176 Tmax = LowEdgeEnergy/2.;
>> 177 d = G4std::min(ParticleCutInKineticEnergy[J], Tmax)/ParticleMass;
>> 178 ionloss = log(2.*(tau+2.)/Eexcm2)-1.-beta2
>> 179 + log((tau-d)*d)+tau/(tau-d)
>> 180 + (0.5*d*d+(2.*tau+1.)*log(1.-d/tau))/gamma2;
>> 181 }
>> 182 else //positron
>> 183 {
>> 184 Tmax = LowEdgeEnergy ;
>> 185 d = G4std::min(ParticleCutInKineticEnergy[J], Tmax)/ParticleMass;
>> 186 d2=d*d/2.; d3=d*d*d/3.; d4=d*d*d*d/4.;
>> 187 y=1./(1.+gamma);
>> 188 ionloss = log(2.*(tau+2.)/Eexcm2)+log(tau*d)
>> 189 - beta2*(tau+2.*d-y*(3.*d2+y*(d-d3+y*(d2-tau*d3+d4))))/tau;
>> 190 }
>> 191
>> 192 //density correction
>> 193 x = log(bg2)/twoln10;
>> 194 if (x < X0den) delta = 0.;
>> 195 else { delta = twoln10*x - Cden;
>> 196 if (x < X1den) delta += Aden*pow((X1den-x),Mden);
>> 197 }
>> 198
>> 199 //now you can compute the total ionization loss
>> 200 ionloss -= delta ;
>> 201 ionloss *= Factor*ElectronDensity/beta2 ;
>> 202 if (ionloss <= 0.) ionloss = 0.;
>> 203
>> 204 // low energy ?
>> 205 if(Tsav > 0.)
>> 206 {
>> 207 if(Tsav >= Tl)
>> 208 ionloss *= sqrt(LowEdgeEnergy/Tsav) ;
>> 209 else
>> 210 ionloss *= sqrt(LowEdgeEnergy*Tsav)/Tl ;
>> 211 }
>> 212
>> 213 aVector->PutValue(i,ionloss) ;
>> 214 }
>> 215 theLossTable->insert(aVector);
>> 216 }
75 } 217 }
76 218
77 //....oooOO0OOooo........oooOO0OOooo........oo 219 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
78 220
79 G4bool G4eIonisation::IsApplicable(const G4Par << 221 void G4eIonisation::BuildLambdaTable(const G4ParticleDefinition& aParticleType)
80 { 222 {
81 return (&p == theElectron || &p == G4Positro << 223 // Build mean free path tables for the delta ray production process
>> 224 // tables are built for MATERIALS
>> 225
>> 226 G4double LowEdgeEnergy, Value, SIGMA;
>> 227
>> 228 //create table
>> 229 const G4MaterialTable* theMaterialTable=G4Material::GetMaterialTable();
>> 230 G4int numOfMaterials = theMaterialTable->length();
>> 231
>> 232 if (theMeanFreePathTable) { theMeanFreePathTable->clearAndDestroy();
>> 233 delete theMeanFreePathTable;
>> 234 }
>> 235
>> 236 theMeanFreePathTable = new G4PhysicsTable(numOfMaterials);
>> 237
>> 238 // get electron cuts in kinetic energy
>> 239 // The electron cuts needed in the case of the positron , too!
>> 240 // This is the reason why SetCut has to be called for electron first !!!!!!!
>> 241
>> 242 if((G4Electron::Electron()->GetCutsInEnergy() == 0) &&
>> 243 ( &aParticleType == G4Positron::Positron()))
>> 244 {
>> 245 G4cout << " The ELECTRON energy cuts needed to compute energy loss/mean free path "
>> 246 " for POSITRON , too. " << G4endl;
>> 247 G4Exception(" Call SetCut for e- first !!!!!!") ;
>> 248 }
>> 249
>> 250 G4double* DeltaCutInKineticEnergy = G4Electron::Electron()->GetCutsInEnergy() ;
>> 251
>> 252 // loop for materials
>> 253
>> 254 for (G4int J=0 ; J < numOfMaterials; J++)
>> 255 {
>> 256 //create physics vector then fill it ....
>> 257
>> 258 G4PhysicsLogVector* aVector = new G4PhysicsLogVector(
>> 259 LowerBoundLambda, UpperBoundLambda, NbinLambda);
>> 260
>> 261 // compute the (macroscopic) cross section first
>> 262
>> 263 const G4Material* material= (*theMaterialTable)[J];
>> 264 const
>> 265 G4ElementVector* theElementVector = material->GetElementVector();
>> 266 const
>> 267 G4double* theAtomicNumDensityVector = material->GetAtomicNumDensityVector();
>> 268 const
>> 269 G4int NumberOfElements = material->GetNumberOfElements() ;
>> 270
>> 271 // get the electron kinetic energy cut for the actual material,
>> 272 // it will be used in ComputeMicroscopicCrossSection
>> 273 // (--> it will be the same for all the elements in this material )
>> 274 G4double DeltaThreshold = DeltaCutInKineticEnergy[J] ;
>> 275
>> 276 for (G4int i = 0 ; i < NbinLambda ; i++)
>> 277 {
>> 278 LowEdgeEnergy = aVector->GetLowEdgeEnergy(i) ;
>> 279 SIGMA = 0.;
>> 280 for (G4int iel=0; iel<NumberOfElements; iel++ )
>> 281 {
>> 282 SIGMA += theAtomicNumDensityVector[iel]*
>> 283 ComputeMicroscopicCrossSection( aParticleType,
>> 284 LowEdgeEnergy,
>> 285 (*theElementVector)(iel)->GetZ(),
>> 286 DeltaThreshold);
>> 287 }
>> 288
>> 289 // mean free path = 1./macroscopic cross section
>> 290 Value = SIGMA > DBL_MIN ? 1./SIGMA : DBL_MAX;
>> 291 aVector->PutValue(i, Value) ;
>> 292 }
>> 293 theMeanFreePathTable->insert(aVector);
>> 294 }
82 } 295 }
83 296
84 //....oooOO0OOooo........oooOO0OOooo........oo 297 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
85 298
86 void G4eIonisation::InitialiseEnergyLossProces << 299 G4double G4eIonisation::ComputeMicroscopicCrossSection(
87 const G4ParticleDefinition* part, << 300 const G4ParticleDefinition& aParticleType,
88 const G4ParticleDefinition*) << 301 G4double KineticEnergy,
>> 302 G4double AtomicNumber ,
>> 303 G4double DeltaThreshold)
>> 304 {
>> 305 // calculates the microscopic cross section
>> 306 //(it is called for elements , AtomicNumber = Z )
>> 307
>> 308 G4double MaxKineticEnergyTransfer, TotalCrossSection(0.);
>> 309
>> 310 ParticleMass = aParticleType.GetPDGMass();
>> 311 G4double TotalEnergy = KineticEnergy + ParticleMass;
>> 312
>> 313 G4double betasquare = KineticEnergy*(TotalEnergy+ParticleMass)
>> 314 /(TotalEnergy*TotalEnergy);
>> 315 G4double gamma = TotalEnergy/ParticleMass, gamma2 = gamma*gamma;
>> 316 G4double x=DeltaThreshold/KineticEnergy, x2 = x*x;
>> 317
>> 318 if (&aParticleType==G4Electron::Electron())
>> 319 MaxKineticEnergyTransfer = 0.5*KineticEnergy;
>> 320 else MaxKineticEnergyTransfer = KineticEnergy;
>> 321
>> 322 // now you can calculate the total cross section
>> 323
>> 324 if (MaxKineticEnergyTransfer > DeltaThreshold)
>> 325 {
>> 326 if (&aParticleType==G4Electron::Electron()) //Moller (e-e-) scattering
>> 327 {
>> 328 TotalCrossSection = (gamma-1.)*(gamma-1.)*(0.5-x)/gamma2 + 1./x
>> 329 - 1./(1.-x)-(2.*gamma-1.)*log((1.-x)/x)/gamma2;
>> 330 TotalCrossSection /= betasquare;
>> 331 }
>> 332 else //Bhabha (e+e-) scattering
>> 333 {
>> 334 G4double y=1./(1.+gamma), y2 =y*y, y12=1.-2.*y;
>> 335 G4double b1=2.-y2, b2=y12*(3.+y2), b4=y12*y12*y12, b3=b4+y12*y12;
>> 336 TotalCrossSection = (1./x-1.)/betasquare+b1*log(x)+b2*(1.-x)
>> 337 - b3*(1.-x2)/2.+b4*(1.-x2*x)/3.;
>> 338 }
>> 339 TotalCrossSection *= (twopi_mc2_rcl2*AtomicNumber/KineticEnergy);
>> 340 }
>> 341 return TotalCrossSection ;
>> 342 }
>> 343
>> 344 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 345
>> 346 G4VParticleChange* G4eIonisation::PostStepDoIt( const G4Track& trackData,
>> 347 const G4Step& stepData)
89 { 348 {
90 if(!isInitialised) { << 349 aParticleChange.Initialize(trackData) ;
91 if(part != theElectron) { isElectron = fal << 350
92 if (nullptr == EmModel(0)) { SetEmModel(ne << 351 G4Material* aMaterial = trackData.GetMaterial() ;
93 G4EmParameters* param = G4EmParameters::In << 352 const G4DynamicParticle* aParticle = trackData.GetDynamicParticle() ;
94 EmModel(0)->SetLowEnergyLimit(param->MinKi << 353
95 EmModel(0)->SetHighEnergyLimit(param->MaxK << 354 ParticleMass = aParticle->GetDefinition()->GetPDGMass();
96 if (nullptr == FluctModel()) { << 355 G4double KineticEnergy = aParticle->GetKineticEnergy();
97 SetFluctModel(G4EmStandUtil::ModelOfFluc << 356 G4double TotalEnergy = KineticEnergy + ParticleMass;
>> 357 G4double Psquare = KineticEnergy*(TotalEnergy+ParticleMass);
>> 358 G4double TotalMomentum = sqrt(Psquare);
>> 359 G4double Esquare=TotalEnergy*TotalEnergy;
>> 360 G4ParticleMomentum ParticleDirection = aParticle->GetMomentumDirection();
>> 361
>> 362 // get kinetic energy cut for the electron
>> 363 G4double* DeltaCutInKineticEnergy = G4Electron::Electron()->GetCutsInEnergy() ;
>> 364 G4double DeltaThreshold = DeltaCutInKineticEnergy[aMaterial->GetIndex()];
>> 365
>> 366 // some kinematics
>> 367 G4double MaxKineticEnergyTransfer;
>> 368 if (Charge < 0.) MaxKineticEnergyTransfer = 0.5*KineticEnergy;
>> 369 else MaxKineticEnergyTransfer = KineticEnergy;
>> 370
>> 371 // sampling kinetic energy of the delta ray
>> 372
>> 373 if (MaxKineticEnergyTransfer <= DeltaThreshold) // pathological case (should not happen,
>> 374 // there is no change at all)
>> 375 return G4VContinuousDiscreteProcess::PostStepDoIt(trackData,stepData);
>> 376
>> 377
>> 378 // normal case
>> 379 G4double cc,y,y2,c2,b0,b1,b2,b3,b4,x,x1,grej,grejc;
>> 380
>> 381 G4double tau = KineticEnergy/ParticleMass;
>> 382 G4double gamma = tau+1., gamma2=gamma*gamma;
>> 383 G4double xc = DeltaThreshold/KineticEnergy, xc1=1.-xc;
>> 384
>> 385 if (Charge < 0.) // Moller (e-e-) scattering
>> 386 {
>> 387 b1=4./(9.*gamma2-10.*gamma+5.);
>> 388 b2=tau*tau*b1; b3=(2.*gamma2+2.*gamma-1.)*b1;
>> 389 cc=1.-2.*xc;
>> 390 do {
>> 391 x = xc/(1.-cc*G4UniformRand()); x1 = 1.-x;
>> 392 grej = b2*x*x-b3*x/x1+b1*gamma2/(x1*x1);
>> 393 } while (G4UniformRand()>grej) ;
98 } 394 }
99 AddEmModel(1, EmModel(), FluctModel()); << 395 else // Bhabha (e+e-) scattering
100 isInitialised = true; << 396 {
101 } << 397 y=1./(gamma+1.); y2=y*y; cc=1.-2.*y;
>> 398 b1=2.-y2; b2=cc*(3.+y2);
>> 399 c2=cc*cc; b4=c2*cc; b3=c2+b4;
>> 400 b0=gamma2/(gamma2-1.);
>> 401 grejc=(((b4*xc-b3)*xc+b2)*xc-b1)*xc+b0;
>> 402 do {
>> 403 x = xc/(1.-xc1*G4UniformRand());
>> 404 grej = ((((b4*x-b3)*x+b2)*x-b1)*x+b0)/grejc;
>> 405 } while (G4UniformRand()>grej);
>> 406 }
>> 407
>> 408 G4double DeltaKineticEnergy = x * KineticEnergy;
>> 409
>> 410 // protection :do not produce a secondary with 0. kinetic energy !
>> 411 if (DeltaKineticEnergy <= 0.)
>> 412 return G4VContinuousDiscreteProcess::PostStepDoIt(trackData,stepData);
>> 413
>> 414 G4double DeltaTotalMomentum = sqrt(DeltaKineticEnergy * (DeltaKineticEnergy +
>> 415 2. * electron_mass_c2 ));
>> 416
>> 417 G4double costheta = DeltaKineticEnergy * (TotalEnergy + electron_mass_c2)
>> 418 /(DeltaTotalMomentum * TotalMomentum);
>> 419
>> 420 if (costheta < -1.) costheta = -1.;
>> 421 if (costheta > +1.) costheta = +1.;
>> 422
>> 423 // direction of the delta electron
>> 424
>> 425 G4double phi = twopi * G4UniformRand();
>> 426 G4double sintheta = sqrt((1.+costheta)*(1.-costheta));
>> 427 G4double dirx = sintheta * cos(phi), diry = sintheta * sin(phi), dirz = costheta;
>> 428
>> 429 G4ThreeVector DeltaDirection(dirx,diry,dirz);
>> 430 DeltaDirection.rotateUz(ParticleDirection);
>> 431
>> 432 // create G4DynamicParticle object for delta ray
>> 433
>> 434 G4DynamicParticle* theDeltaRay = new G4DynamicParticle;
>> 435 theDeltaRay->SetKineticEnergy( DeltaKineticEnergy );
>> 436 theDeltaRay->SetMomentumDirection(
>> 437 DeltaDirection.x(),DeltaDirection.y(),DeltaDirection.z());
>> 438 theDeltaRay->SetDefinition(G4Electron::Electron());
>> 439
>> 440 // fill aParticleChange
>> 441 // changed energy and momentum of the actual particle
>> 442 G4double finalKineticEnergy = KineticEnergy - DeltaKineticEnergy;
>> 443
>> 444 G4double Edep = 0. ;
>> 445
>> 446 if (finalKineticEnergy > MinKineticEnergy)
>> 447 {
>> 448 G4double finalPx = TotalMomentum*ParticleDirection.x()
>> 449 - DeltaTotalMomentum*DeltaDirection.x();
>> 450 G4double finalPy = TotalMomentum*ParticleDirection.y()
>> 451 - DeltaTotalMomentum*DeltaDirection.y();
>> 452 G4double finalPz = TotalMomentum*ParticleDirection.z()
>> 453 - DeltaTotalMomentum*DeltaDirection.z();
>> 454 G4double finalMomentum =
>> 455 sqrt(finalPx*finalPx+finalPy*finalPy+finalPz*finalPz) ;
>> 456 finalPx /= finalMomentum ;
>> 457 finalPy /= finalMomentum ;
>> 458 finalPz /= finalMomentum ;
>> 459
>> 460 aParticleChange.SetMomentumChange( finalPx,finalPy,finalPz );
>> 461 }
>> 462 else
>> 463 {
>> 464 finalKineticEnergy = 0.;
>> 465 Edep = finalKineticEnergy ;
>> 466 if (Charge < 0.) aParticleChange.SetStatusChange(fStopAndKill);
>> 467 else aParticleChange.SetStatusChange(fStopButAlive);
>> 468 }
>> 469
>> 470 aParticleChange.SetEnergyChange( finalKineticEnergy );
>> 471 aParticleChange.SetNumberOfSecondaries(1);
>> 472 aParticleChange.AddSecondary( theDeltaRay );
>> 473 aParticleChange.SetLocalEnergyDeposit (Edep);
>> 474
>> 475 return G4VContinuousDiscreteProcess::PostStepDoIt(trackData,stepData);
102 } 476 }
103 477
104 //....oooOO0OOooo........oooOO0OOooo........oo 478 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
105 479
106 void G4eIonisation::ProcessDescription(std::os << 480 void G4eIonisation::PrintInfoDefinition()
107 { 481 {
108 out << " Ionisation"; << 482 G4String comments = "delta cross sections from Moller+Bhabha. ";
109 G4VEnergyLossProcess::ProcessDescription(out << 483 comments += "Good description from 1 KeV to 100 GeV.\n";
110 } << 484 comments += " delta ray energy sampled from differential Xsection.";
>> 485
>> 486 G4cout << G4endl << GetProcessName() << ": " << comments
>> 487 << "\n PhysicsTables from " << G4BestUnit(LowerBoundLambda,"Energy")
>> 488 << " to " << G4BestUnit(UpperBoundLambda,"Energy")
>> 489 << " in " << NbinLambda << " bins. \n";
>> 490 }
111 491
112 //....oooOO0OOooo........oooOO0OOooo........oo << 492 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
113 493