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Geant4/processes/electromagnetic/standard/src/G4eCoulombScatteringModel.cc

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Differences between /processes/electromagnetic/standard/src/G4eCoulombScatteringModel.cc (Version 11.3.0) and /processes/electromagnetic/standard/src/G4eCoulombScatteringModel.cc (Version 9.4.p3)


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                                                   >>  26 // $Id: G4eCoulombScatteringModel.cc,v 1.91 2010-11-13 18:45:55 vnivanch Exp $
                                                   >>  27 // GEANT4 tag $Name: not supported by cvs2svn $
 26 //                                                 28 //
 27 // -------------------------------------------     29 // -------------------------------------------------------------------
 28 //                                                 30 //
 29 // GEANT4 Class file                               31 // GEANT4 Class file
 30 //                                                 32 //
 31 //                                                 33 //
 32 // File name:     G4eCoulombScatteringModel        34 // File name:     G4eCoulombScatteringModel
 33 //                                                 35 //
 34 // Author:        Vladimir Ivanchenko              36 // Author:        Vladimir Ivanchenko 
 35 //                                                 37 //
 36 // Creation date: 22.08.2005                       38 // Creation date: 22.08.2005
 37 //                                                 39 //
 38 // Modifications: V.Ivanchenko                 <<  40 // Modifications:
 39 //                                                 41 //
                                                   >>  42 // 01.08.06 V.Ivanchenko extend upper limit of table to TeV and review the
                                                   >>  43 //          logic of building - only elements from G4ElementTable
                                                   >>  44 // 08.08.06 V.Ivanchenko build internal table in ekin scale, introduce faclim
                                                   >>  45 // 19.08.06 V.Ivanchenko add inline function ScreeningParameter 
                                                   >>  46 // 09.10.07 V.Ivanchenko reorganized methods, add cut dependence in scattering off e- 
                                                   >>  47 // 09.06.08 V.Ivanchenko add SelectIsotope and sampling of the recoil ion 
                                                   >>  48 // 16.06.09 C.Consolandi fixed computation of effective mass
                                                   >>  49 // 27.05.10 V.Ivanchenko added G4WentzelOKandVIxSection class to
                                                   >>  50 //              compute cross sections and sample scattering angle
 40 //                                                 51 //
 41 //                                                 52 //
 42 // Class Description:                              53 // Class Description:
 43 //                                                 54 //
 44 // -------------------------------------------     55 // -------------------------------------------------------------------
 45 //                                                 56 //
 46 //....oooOO0OOooo........oooOO0OOooo........oo     57 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 47 //....oooOO0OOooo........oooOO0OOooo........oo     58 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 48                                                    59 
 49 #include "G4eCoulombScatteringModel.hh"            60 #include "G4eCoulombScatteringModel.hh"
 50 #include "G4PhysicalConstants.hh"              << 
 51 #include "G4SystemOfUnits.hh"                  << 
 52 #include "Randomize.hh"                            61 #include "Randomize.hh"
 53 #include "G4DataVector.hh"                         62 #include "G4DataVector.hh"
 54 #include "G4ElementTable.hh"                       63 #include "G4ElementTable.hh"
 55 #include "G4ParticleChangeForGamma.hh"             64 #include "G4ParticleChangeForGamma.hh"
 56 #include "G4Proton.hh"                             65 #include "G4Proton.hh"
 57 #include "G4ParticleTable.hh"                      66 #include "G4ParticleTable.hh"
 58 #include "G4IonTable.hh"                       << 
 59 #include "G4ProductionCutsTable.hh"                67 #include "G4ProductionCutsTable.hh"
 60 #include "G4NucleiProperties.hh"                   68 #include "G4NucleiProperties.hh"
 61 #include "G4Pow.hh"                                69 #include "G4Pow.hh"
                                                   >>  70 #include "G4LossTableManager.hh"
                                                   >>  71 #include "G4ProcessManager.hh"
 62 #include "G4NistManager.hh"                        72 #include "G4NistManager.hh"
 63                                                    73 
 64 //....oooOO0OOooo........oooOO0OOooo........oo     74 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 65                                                    75 
 66 using namespace std;                               76 using namespace std;
 67                                                    77 
 68 G4eCoulombScatteringModel::G4eCoulombScatterin <<  78 G4eCoulombScatteringModel::G4eCoulombScatteringModel(const G4String& nam)
 69   : G4VEmModel("eCoulombScattering"), isCombin <<  79   : G4VEmModel(nam),
                                                   >>  80     cosThetaMin(1.0),
                                                   >>  81     cosThetaMax(-1.0),
                                                   >>  82     isInitialised(false)
 70 {                                                  83 {
 71   fNistManager = G4NistManager::Instance();        84   fNistManager = G4NistManager::Instance();
 72   theIonTable  = G4ParticleTable::GetParticleT <<  85   theParticleTable = G4ParticleTable::GetParticleTable();
 73   theProton    = G4Proton::Proton();           <<  86   theProton   = G4Proton::Proton();
                                                   >>  87   currentMaterial = 0; 
                                                   >>  88   currentElement  = 0;
                                                   >>  89   lowEnergyLimit = 1*keV;
                                                   >>  90   recoilThreshold = 0.*keV;
                                                   >>  91   particle = 0;
                                                   >>  92   currentCouple = 0;
                                                   >>  93   wokvi = new G4WentzelOKandVIxSection();
 74                                                    94 
 75   wokvi = new G4WentzelOKandVIxSection(isCombi <<  95   currentMaterialIndex = 0;
 76                                                    96 
 77   mass = CLHEP::proton_mass_c2;                <<  97   cosTetMinNuc = 1.0;
                                                   >>  98   cosTetMaxNuc = -1.0;
                                                   >>  99   elecRatio = 0.0;
                                                   >> 100   mass = proton_mass_c2;
 78 }                                                 101 }
 79                                                   102 
 80 //....oooOO0OOooo........oooOO0OOooo........oo    103 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 81                                                   104 
 82 G4eCoulombScatteringModel::~G4eCoulombScatteri    105 G4eCoulombScatteringModel::~G4eCoulombScatteringModel()
 83 {                                                 106 {
 84   delete wokvi;                                   107   delete wokvi;
 85 }                                                 108 }
 86                                                   109 
 87 //....oooOO0OOooo........oooOO0OOooo........oo    110 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 88                                                   111 
 89 void G4eCoulombScatteringModel::Initialise(con << 112 void G4eCoulombScatteringModel::Initialise(const G4ParticleDefinition* p,
 90              const G4DataVector& cuts)            113              const G4DataVector& cuts)
 91 {                                                 114 {
 92   SetupParticle(part);                         << 115   SetupParticle(p);
 93   currentCouple = nullptr;                     << 116   currentCouple = 0;
 94                                                << 117   cosThetaMin = cos(PolarAngleLimit());
 95   G4double tet = PolarAngleLimit();            << 118   wokvi->Initialise(p, cosThetaMin);
 96                                                << 
 97   // defined theta limit between single and mu << 
 98   if(isCombined) {                             << 
 99     if(tet >= CLHEP::pi) { cosThetaMin = -1.0; << 
100     else if(tet > 0.0) { cosThetaMin = std::co << 
101                                                << 
102     // single scattering without multiple      << 
103   } else if(tet > 0.0) {                       << 
104     cosThetaMin = std::cos(std::min(tet, CLHEP << 
105   }                                            << 
106                                                << 
107   wokvi->Initialise(part, cosThetaMin);        << 
108   pCuts = &cuts;                               << 
109   /*                                              119   /*
110   G4cout << "G4eCoulombScatteringModel::Initia << 120   G4cout << "G4eCoulombScatteringModel: factorA2(GeV^2) = " << factorA2/(GeV*GeV) 
111      << part->GetParticleName() << " 1-cos(Tet << 121          << "  1-cos(ThetaLimit)= " << 1 - cosThetaMin
112      << " 1-cos(TetMax)= " << 1. - cosThetaMax << 122    << "  cos(thetaMax)= " <<  cosThetaMax
113   G4cout << "cut[0]= " << (*pCuts)[0] << G4end << 123    << G4endl;
114   */                                              124   */
115   if(nullptr == fParticleChange) {             << 125   pCuts = G4ProductionCutsTable::GetProductionCutsTable()->GetEnergyCutsVector(3);
                                                   >> 126   //G4cout << "!!! G4eCoulombScatteringModel::Initialise for " 
                                                   >> 127   //   << p->GetParticleName() << "  cos(TetMin)= " << cosThetaMin 
                                                   >> 128   //   << "  cos(TetMax)= " << cosThetaMax <<G4endl;
                                                   >> 129   // G4cout << "cut0= " << cuts[0] << "  cut1= " << cuts[1] << G4endl;
                                                   >> 130   if(!isInitialised) {
                                                   >> 131     isInitialised = true;
116     fParticleChange = GetParticleChangeForGamm    132     fParticleChange = GetParticleChangeForGamma();
117   }                                               133   }
118   if(IsMaster() && mass < GeV && part->GetPart << 134   if(mass < GeV && particle->GetParticleType() != "nucleus") {
119     InitialiseElementSelectors(part, cuts);    << 135     InitialiseElementSelectors(p,cuts);
120   }                                               136   }
121 }                                                 137 }
122                                                   138 
123 //....oooOO0OOooo........oooOO0OOooo........oo    139 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
124                                                   140 
125 void G4eCoulombScatteringModel::InitialiseLoca << 
126             G4VEmModel* masterModel)           << 
127 {                                              << 
128   SetElementSelectors(masterModel->GetElementS << 
129 }                                              << 
130                                                << 
131 //....oooOO0OOooo........oooOO0OOooo........oo << 
132                                                << 
133 G4double                                       << 
134 G4eCoulombScatteringModel::MinPrimaryEnergy(co << 
135               const G4ParticleDefinition* part << 
136               G4double)                        << 
137 {                                              << 
138   SetupParticle(part);                         << 
139                                                << 
140   // define cut using cuts for proton          << 
141   G4double cut =                               << 
142     std::max(recoilThreshold, (*pCuts)[Current << 
143                                                << 
144   // find out lightest element                 << 
145   const G4ElementVector* theElementVector = ma << 
146   std::size_t nelm = material->GetNumberOfElem << 
147                                                << 
148   // select lightest element                   << 
149   G4int Z = 300;                               << 
150   for (std::size_t j=0; j<nelm; ++j) {         << 
151     Z = std::min(Z,(*theElementVector)[j]->Get << 
152   }                                            << 
153   G4int A = G4lrint(fNistManager->GetAtomicMas << 
154   G4double targetMass = G4NucleiProperties::Ge << 
155   G4double t = std::max(cut, 0.5*(cut + sqrt(2 << 
156                                                << 
157   return t;                                    << 
158 }                                              << 
159                                                << 
160 //....oooOO0OOooo........oooOO0OOooo........oo << 
161                                                << 
162 G4double G4eCoulombScatteringModel::ComputeCro    141 G4double G4eCoulombScatteringModel::ComputeCrossSectionPerAtom(
163                 const G4ParticleDefinition* p,    142                 const G4ParticleDefinition* p,
164     G4double kinEnergy,                           143     G4double kinEnergy,
165     G4double Z, G4double,                         144     G4double Z, G4double,
166     G4double cutEnergy, G4double)                 145     G4double cutEnergy, G4double)
167 {                                                 146 {
168   /*                                           << 147   //G4cout << "### G4eCoulombScatteringModel::ComputeCrossSectionPerAtom  for " 
169   G4cout << "### G4eCoulombScatteringModel::Co << 148   //  << p->GetParticleName()<<" Z= "<<Z<<" e(MeV)= "<< kinEnergy/MeV << G4endl; 
170    << p->GetParticleName()<<" Z= "<<Z<<" e(MeV << 149   G4double xsec = 0.0;
171    << G4endl;                                  << 
172   */                                           << 
173   G4double cross = 0.0;                        << 
174   elecRatio = 0.0;                             << 
175   if(p != particle) { SetupParticle(p); }         150   if(p != particle) { SetupParticle(p); }
176                                                   151 
177   // cross section is set to zero to avoid pro    152   // cross section is set to zero to avoid problems in sample secondary
178   if(kinEnergy <= 0.0) { return cross; }       << 153   if(kinEnergy <= 0.0) { return xsec; }
179   DefineMaterial(CurrentCouple());                154   DefineMaterial(CurrentCouple());
180   G4double costmin = wokvi->SetupKinematic(kin << 155   cosTetMinNuc = wokvi->SetupKinematic(kinEnergy, currentMaterial);
181                                                << 156   if(cosThetaMax < cosTetMinNuc) {
182   //G4cout << "cosThetaMax= "<<cosThetaMax<<"  << 157     G4int iz = G4int(Z);
183                                                << 158     cosTetMinNuc = wokvi->SetupTarget(iz, cutEnergy);
184   if(cosThetaMax < costmin) {                  << 159     cosTetMaxNuc = cosThetaMax; 
185     G4int iz = G4lrint(Z);                     << 160     if(iz == 1 && cosTetMaxNuc < 0.0 && particle == theProton) { 
186     G4double cut = (0.0 < fixedCut) ? fixedCut << 161       cosTetMaxNuc = 0.0; 
187     costmin = wokvi->SetupTarget(iz, cut);     << 
188     //G4cout << "SetupTarget: Z= " << iz << "  << 
189     //     << costmin << G4endl;               << 
190     G4double costmax = (1 == iz && particle == << 
191       ? 0.0 : cosThetaMax;                     << 
192     if(costmin > costmax) {                    << 
193       cross = wokvi->ComputeNuclearCrossSectio << 
194         + wokvi->ComputeElectronCrossSection(c << 
195     }                                             162     }
196     /*                                         << 163     xsec =  wokvi->ComputeNuclearCrossSection(cosTetMinNuc, cosTetMaxNuc);
197     if(p->GetParticleName() == "e-")           << 164     elecRatio = wokvi->ComputeElectronCrossSection(cosTetMinNuc, cosThetaMax);
198     G4cout << "Z= " << Z << " e(MeV)= " << kin << 165     xsec += elecRatio;
199      << " cross(b)= " << cross/barn << " 1-cos << 166     if(xsec > 0.0) { elecRatio /= xsec; }  
200      << " 1-costmax= " << 1-costmax            << 
201      << " 1-cosThetaMax= " << 1-cosThetaMax    << 
202      << "  " << currentMaterial->GetName()     << 
203      << G4endl;                                << 
204     */                                         << 
205   }                                               167   }
206   //G4cout << "====== cross= " << cross << G4e << 168   /*
207   return cross;                                << 169   G4cout << "e(MeV)= " << kinEnergy/MeV << " xsec(b)= " << xsec/barn  
                                                   >> 170    << " 1-cosTetMinNuc= " << 1-cosTetMinNuc
                                                   >> 171    << " 1-cosTetMaxNuc2= " << 1-cosTetMaxNuc2
                                                   >> 172    << " 1-cosTetMaxElec= " << 1-cosTetMaxElec
                                                   >> 173    << " screenZ= " << screenZ
                                                   >> 174    << " formfactA= " << formfactA << G4endl;
                                                   >> 175   */
                                                   >> 176   return xsec;  
208 }                                                 177 }
209                                                   178 
210 //....oooOO0OOooo........oooOO0OOooo........oo    179 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
211                                                   180 
212 void G4eCoulombScatteringModel::SampleSecondar    181 void G4eCoulombScatteringModel::SampleSecondaries(
213                 std::vector<G4DynamicParticle*    182                 std::vector<G4DynamicParticle*>* fvect,
214     const G4MaterialCutsCouple* couple,           183     const G4MaterialCutsCouple* couple,
215     const G4DynamicParticle* dp,                  184     const G4DynamicParticle* dp,
216     G4double cutEnergy,                           185     G4double cutEnergy,
217     G4double)                                     186     G4double)
218 {                                                 187 {
219   G4double kinEnergy = dp->GetKineticEnergy();    188   G4double kinEnergy = dp->GetKineticEnergy();
                                                   >> 189   if(kinEnergy < lowEnergyLimit) {
                                                   >> 190     fParticleChange->SetProposedKineticEnergy(0.0);
                                                   >> 191     fParticleChange->ProposeLocalEnergyDeposit(kinEnergy);
                                                   >> 192     fParticleChange->ProposeNonIonizingEnergyDeposit(kinEnergy);
                                                   >> 193     if(particle->GetProcessManager()->GetAtRestProcessVector()->size() > 0)
                                                   >> 194          { fParticleChange->ProposeTrackStatus(fStopButAlive); }
                                                   >> 195     else { fParticleChange->ProposeTrackStatus(fStopAndKill); }
                                                   >> 196     return;
                                                   >> 197   }
220   SetupParticle(dp->GetDefinition());             198   SetupParticle(dp->GetDefinition());
221   DefineMaterial(couple);                         199   DefineMaterial(couple);
222   /*                                           << 
223   G4cout << "G4eCoulombScatteringModel::Sample << 
224      << kinEnergy << "  " << particle->GetPart << 
225      << " cut= " << cutEnergy<< G4endl;        << 
226   */                                           << 
227   // Choose nucleus                            << 
228   G4double cut = (0.0 < fixedCut) ? fixedCut : << 
229                                                   200 
230   wokvi->SetupKinematic(kinEnergy, currentMate << 201   //G4cout << "G4eCoulombScatteringModel::SampleSecondaries e(MeV)= " 
                                                   >> 202   //   << kinEnergy << "  " << particle->GetParticleName() 
                                                   >> 203   //   << " cut= " << cutEnergy<< G4endl;
                                                   >> 204  
                                                   >> 205   // Choose nucleus
                                                   >> 206   currentElement = SelectRandomAtom(couple,particle,
                                                   >> 207             kinEnergy,cutEnergy,kinEnergy);
231                                                   208 
232   const G4Element* currentElement = SelectTarg << 209   G4double Z = currentElement->GetZ();
233                                        dp->Get << 210   
234   G4int iz = currentElement->GetZasInt();      << 211   if(ComputeCrossSectionPerAtom(particle,kinEnergy, Z,
235                                                << 212         kinEnergy, cutEnergy, kinEnergy) == 0.0) 
236   G4double costmin = wokvi->SetupTarget(iz, cu << 213     { return; }
237   G4double costmax = (1 == iz && particle == t << 
238     ? 0.0 :  cosThetaMax;                      << 
239   if(costmin <= costmax) { return; }           << 
240                                                << 
241   G4double cross = wokvi->ComputeNuclearCrossS << 
242   G4double ecross = wokvi->ComputeElectronCros << 
243   G4double ratio = ecross/(cross + ecross);    << 
244                                                   214 
                                                   >> 215   G4int iz = G4int(Z);
245   G4int ia = SelectIsotopeNumber(currentElemen    216   G4int ia = SelectIsotopeNumber(currentElement);
246   G4double targetMass = G4NucleiProperties::Ge    217   G4double targetMass = G4NucleiProperties::GetNuclearMass(ia, iz);
247   wokvi->SetTargetMass(targetMass);            << 
248                                                   218 
249   G4ThreeVector newDirection =                    219   G4ThreeVector newDirection = 
250     wokvi->SampleSingleScattering(costmin, cos << 220     wokvi->SampleSingleScattering(cosTetMinNuc, cosThetaMax, elecRatio);
251   G4double cost = newDirection.z();               221   G4double cost = newDirection.z();
252     /*                                         << 222 
253       G4cout << "SampleSec: e(MeV)= " << kinEn << 
254              << " 1-costmin= " << 1-costmin    << 
255              << " 1-costmax= " << 1-costmax    << 
256              << " 1-cost= " << 1-cost          << 
257              << " ratio= " << ratio            << 
258              << G4endl;                        << 
259     */                                         << 
260   G4ThreeVector direction = dp->GetMomentumDir    223   G4ThreeVector direction = dp->GetMomentumDirection(); 
261   newDirection.rotateUz(direction);               224   newDirection.rotateUz(direction);   
262                                                   225 
263   fParticleChange->ProposeMomentumDirection(ne    226   fParticleChange->ProposeMomentumDirection(newDirection);   
264                                                   227 
265   // recoil sampling assuming a small recoil      228   // recoil sampling assuming a small recoil
266   // and first order correction to primary 4-m    229   // and first order correction to primary 4-momentum
267   G4double mom2 = wokvi->GetMomentumSquare();     230   G4double mom2 = wokvi->GetMomentumSquare();
268   G4double trec = mom2*(1.0 - cost)            << 231   G4double trec = mom2*(1.0 - cost)/(targetMass + (mass + kinEnergy)*(1.0 - cost));
269     /(targetMass + (mass + kinEnergy)*(1.0 - c << 
270                                                << 
271   // the check likely not needed               << 
272   trec = std::min(trec, kinEnergy);            << 
273   G4double finalT = kinEnergy - trec;             232   G4double finalT = kinEnergy - trec; 
274   G4double edep = 0.0;                         << 233   //G4cout<<"G4eCoulombScatteringModel: finalT= "<<finalT<<" Trec= "<<trec<<G4endl;
275     /*                                         << 234   if(finalT <= lowEnergyLimit) { 
276     G4cout<<"G4eCoulombScatteringModel: finalT << 235     trec = kinEnergy;  
277     <<trec << " Z= " << iz << " A= " << ia     << 236     finalT = 0.0;
278     << " tcut(keV)= " << (*pCuts)[currentMater << 237     if(particle->GetProcessManager()->GetAtRestProcessVector()->size() > 0)
279     */                                         << 238          { fParticleChange->ProposeTrackStatus(fStopButAlive); }
                                                   >> 239     else { fParticleChange->ProposeTrackStatus(fStopAndKill); }
                                                   >> 240   } 
                                                   >> 241 
                                                   >> 242   fParticleChange->SetProposedKineticEnergy(finalT);
280   G4double tcut = recoilThreshold;                243   G4double tcut = recoilThreshold;
281   if(pCuts) { tcut= std::max(tcut,(*pCuts)[cur    244   if(pCuts) { tcut= std::max(tcut,(*pCuts)[currentMaterialIndex]); }
282                                                   245 
283   if(trec > tcut) {                               246   if(trec > tcut) {
284     G4ParticleDefinition* ion = theIonTable->G << 247     G4ParticleDefinition* ion = theParticleTable->FindIon(iz, ia, 0, iz);
285     G4ThreeVector dir = (direction*sqrt(mom2)     248     G4ThreeVector dir = (direction*sqrt(mom2) - 
286        newDirection*sqrt(finalT*(2*mass + fina    249        newDirection*sqrt(finalT*(2*mass + finalT))).unit();
287     auto newdp = new G4DynamicParticle(ion, di << 250     G4DynamicParticle* newdp = new G4DynamicParticle(ion, dir, trec);
288     fvect->push_back(newdp);                      251     fvect->push_back(newdp);
289   } else {                                        252   } else {
290     edep = trec;                               << 253     fParticleChange->ProposeLocalEnergyDeposit(trec);
291     fParticleChange->ProposeNonIonizingEnergyD << 254     fParticleChange->ProposeNonIonizingEnergyDeposit(trec);
292   }                                               255   }
293                                                << 256  
294     // finelize primary energy and energy bala << 257   return;
295     // this threshold may be applied only beca << 
296     // e+e- msc model is applied               << 
297   if(finalT < 0.0) {                           << 
298     edep += finalT;                            << 
299     finalT = 0.0;                              << 
300   }                                            << 
301   edep = std::max(edep, 0.0);                  << 
302   fParticleChange->SetProposedKineticEnergy(fi << 
303   fParticleChange->ProposeLocalEnergyDeposit(e << 
304 }                                                 258 }
305                                                   259 
306 //....oooOO0OOooo........oooOO0OOooo........oo    260 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
                                                   >> 261 
                                                   >> 262 
307                                                   263