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Geant4/processes/electromagnetic/highenergy/src/G4eeToHadronsModel.cc

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Diff markup

Differences between /processes/electromagnetic/highenergy/src/G4eeToHadronsModel.cc (Version 11.3.0) and /processes/electromagnetic/highenergy/src/G4eeToHadronsModel.cc (Version 11.0.p1)


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 27 // -------------------------------------------     27 // -------------------------------------------------------------------
 28 //                                                 28 //
 29 // GEANT4 Class header file                        29 // GEANT4 Class header file
 30 //                                                 30 //
 31 //                                                 31 //
 32 // File name:     G4eeToHadronsModel               32 // File name:     G4eeToHadronsModel
 33 //                                                 33 //
 34 // Author:        Vladimir Ivanchenko              34 // Author:        Vladimir Ivanchenko
 35 //                                                 35 //
 36 // Creation date: 12.08.2003                       36 // Creation date: 12.08.2003
 37 //                                                 37 //
 38 // Modifications:                                  38 // Modifications:
 39 // 08-04-05 Major optimisation of internal int     39 // 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
 40 // 18-05-05 Use optimized interfaces (V.Ivantc     40 // 18-05-05 Use optimized interfaces (V.Ivantchenko)
 41 //                                                 41 //
 42 //                                                 42 //
 43 // -------------------------------------------     43 // -------------------------------------------------------------------
 44 //                                                 44 //
 45                                                    45 
 46                                                    46 
 47 //....oooOO0OOooo........oooOO0OOooo........oo     47 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 48 //....oooOO0OOooo........oooOO0OOooo........oo     48 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 49                                                    49 
 50 #include "G4eeToHadronsModel.hh"                   50 #include "G4eeToHadronsModel.hh"
 51 #include "Randomize.hh"                            51 #include "Randomize.hh"
 52 #include "G4PhysicalConstants.hh"                  52 #include "G4PhysicalConstants.hh"
 53 #include "G4SystemOfUnits.hh"                      53 #include "G4SystemOfUnits.hh"
 54 #include "G4Electron.hh"                           54 #include "G4Electron.hh"
 55 #include "G4Gamma.hh"                              55 #include "G4Gamma.hh"
 56 #include "G4Positron.hh"                           56 #include "G4Positron.hh"
 57 #include "G4PionPlus.hh"                           57 #include "G4PionPlus.hh"
 58 #include "Randomize.hh"                            58 #include "Randomize.hh"
 59 #include "G4Vee2hadrons.hh"                        59 #include "G4Vee2hadrons.hh"
 60 #include "G4PhysicsVector.hh"                      60 #include "G4PhysicsVector.hh"
 61 #include "G4PhysicsLogVector.hh"                   61 #include "G4PhysicsLogVector.hh"
 62 #include "G4Log.hh"                                62 #include "G4Log.hh"
 63 #include "G4Exp.hh"                                63 #include "G4Exp.hh"
 64                                                    64 
 65 //....oooOO0OOooo........oooOO0OOooo........oo     65 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 66                                                    66 
 67 using namespace std;                               67 using namespace std;
 68                                                    68 
 69 G4eeToHadronsModel::G4eeToHadronsModel(G4Vee2h     69 G4eeToHadronsModel::G4eeToHadronsModel(G4Vee2hadrons* mod, G4int ver,
 70                                        const G     70                                        const G4String& nam)
 71   : G4VEmModel(nam),                               71   : G4VEmModel(nam),
 72     model(mod),                                    72     model(mod),
 73     verbose(ver)                                   73     verbose(ver)
 74 {                                                  74 {
 75   theGamma = G4Gamma::Gamma();                     75   theGamma = G4Gamma::Gamma();
 76   highKinEnergy = HighEnergyLimit();               76   highKinEnergy = HighEnergyLimit();
 77   lowKinEnergy  = LowEnergyLimit();                77   lowKinEnergy  = LowEnergyLimit();
 78   emin = lowKinEnergy;                             78   emin = lowKinEnergy;
 79   emax = highKinEnergy;                            79   emax = highKinEnergy;
 80   peakKinEnergy = highKinEnergy;                   80   peakKinEnergy = highKinEnergy;
 81   epeak = emax;                                    81   epeak = emax;
 82   //verbose = 1;                                   82   //verbose = 1;
 83 }                                                  83 }
 84                                                    84 
 85 //....oooOO0OOooo........oooOO0OOooo........oo     85 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 86                                                    86 
 87 G4eeToHadronsModel::~G4eeToHadronsModel()          87 G4eeToHadronsModel::~G4eeToHadronsModel()
 88 {                                                  88 {
 89   delete model;                                    89   delete model;
 90 }                                                  90 }
 91                                                    91 
 92 //....oooOO0OOooo........oooOO0OOooo........oo     92 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 93                                                    93 
 94 void G4eeToHadronsModel::Initialise(const G4Pa     94 void G4eeToHadronsModel::Initialise(const G4ParticleDefinition*,
 95                                     const G4Da     95                                     const G4DataVector&)
 96 {                                                  96 {
 97   if(isInitialised) { return; }                    97   if(isInitialised) { return; }
 98   isInitialised  = true;                           98   isInitialised  = true;
 99                                                    99 
100   // CM system                                    100   // CM system
101   emin = model->LowEnergy();                      101   emin = model->LowEnergy();
102   emax = model->HighEnergy();                     102   emax = model->HighEnergy();
103                                                   103 
104   // peak energy                                  104   // peak energy
105   epeak = std::min(model->PeakEnergy(), emax);    105   epeak = std::min(model->PeakEnergy(), emax);
106                                                   106   
107   if(verbose>0) {                                 107   if(verbose>0) {
108     G4cout << "G4eeToHadronsModel::Initialise:    108     G4cout << "G4eeToHadronsModel::Initialise: " << G4endl;
109     G4cout << "CM System: emin(MeV)= " << emin    109     G4cout << "CM System: emin(MeV)= " << emin/MeV
110            << " epeak(MeV)= " << epeak/MeV        110            << " epeak(MeV)= " << epeak/MeV
111            << " emax(MeV)= " << emax/MeV          111            << " emax(MeV)= " << emax/MeV
112            << G4endl;                             112            << G4endl;
113   }                                               113   }
114                                                   114 
115   crossBornPerElectron = model->PhysicsVector(    115   crossBornPerElectron = model->PhysicsVector();
116   crossPerElectron     = model->PhysicsVector(    116   crossPerElectron     = model->PhysicsVector(); 
117   nbins = (G4int)crossPerElectron->GetVectorLe << 117   nbins = crossPerElectron->GetVectorLength();
118   for(G4int i=0; i<nbins; ++i) {                  118   for(G4int i=0; i<nbins; ++i) {
119     G4double e  = crossPerElectron->Energy(i);    119     G4double e  = crossPerElectron->Energy(i);
120     G4double cs = model->ComputeCrossSection(e    120     G4double cs = model->ComputeCrossSection(e);
121     crossBornPerElectron->PutValue(i, cs);        121     crossBornPerElectron->PutValue(i, cs);
122   }                                               122   }
123   ComputeCMCrossSectionPerElectron();             123   ComputeCMCrossSectionPerElectron();
124                                                   124 
125   if(verbose>1) {                                 125   if(verbose>1) {
126     G4cout << "G4eeToHadronsModel: Cross secti    126     G4cout << "G4eeToHadronsModel: Cross sections per electron"
127            << " nbins= " << nbins                 127            << " nbins= " << nbins
128            << " emin(MeV)= " << emin/MeV          128            << " emin(MeV)= " << emin/MeV
129            << " emax(MeV)= " << emax/MeV          129            << " emax(MeV)= " << emax/MeV
130            << G4endl;                             130            << G4endl;
131     for(G4int i=0; i<nbins; ++i) {                131     for(G4int i=0; i<nbins; ++i) {
132       G4double e  = crossPerElectron->Energy(i    132       G4double e  = crossPerElectron->Energy(i);
133       G4double s1 = crossPerElectron->Value(e)    133       G4double s1 = crossPerElectron->Value(e);
134       G4double s2 = crossBornPerElectron->Valu    134       G4double s2 = crossBornPerElectron->Value(e);
135       G4cout << "E(MeV)= " << e/MeV               135       G4cout << "E(MeV)= " << e/MeV
136              << "  cross(nb)= " << s1/nanobarn    136              << "  cross(nb)= " << s1/nanobarn
137              << "  crossBorn(nb)= " << s2/nano    137              << "  crossBorn(nb)= " << s2/nanobarn
138        << G4endl;                                 138        << G4endl;
139     }                                             139     }
140   }                                               140   }
141 }                                                 141 }
142                                                   142 
143 //....oooOO0OOooo........oooOO0OOooo........oo    143 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
144                                                   144 
145 G4double G4eeToHadronsModel::CrossSectionPerVo    145 G4double G4eeToHadronsModel::CrossSectionPerVolume(
146               const G4Material* mat,              146               const G4Material* mat,
147               const G4ParticleDefinition* p,      147               const G4ParticleDefinition* p,
148               G4double kineticEnergy,             148               G4double kineticEnergy,
149               G4double, G4double)                 149               G4double, G4double)
150 {                                                 150 {
151   return mat->GetElectronDensity()*               151   return mat->GetElectronDensity()*
152     ComputeCrossSectionPerElectron(p, kineticE    152     ComputeCrossSectionPerElectron(p, kineticEnergy);
153 }                                                 153 }
154                                                   154 
155 //....oooOO0OOooo........oooOO0OOooo........oo    155 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
156                                                   156 
157 G4double G4eeToHadronsModel::ComputeCrossSecti    157 G4double G4eeToHadronsModel::ComputeCrossSectionPerAtom(
158                                       const G4    158                                       const G4ParticleDefinition* p,
159               G4double kineticEnergy,             159               G4double kineticEnergy,
160               G4double Z, G4double,               160               G4double Z, G4double,
161               G4double, G4double)                 161               G4double, G4double)
162 {                                                 162 {
163   return Z*ComputeCrossSectionPerElectron(p, k    163   return Z*ComputeCrossSectionPerElectron(p, kineticEnergy);
164 }                                                 164 }
165                                                   165 
166 //....oooOO0OOooo........oooOO0OOooo........oo    166 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
167                                                   167 
168 G4double G4eeToHadronsModel::ComputeCrossSecti    168 G4double G4eeToHadronsModel::ComputeCrossSectionPerElectron(
169                                           cons    169                                           const G4ParticleDefinition*,
170                                                   170                                                 G4double energy,
171                                                   171                                                 G4double, G4double)
172 {                                                 172 {
173   return crossPerElectron->Value(energy);         173   return crossPerElectron->Value(energy);
174 }                                                 174 }
175                                                   175 
176 //....oooOO0OOooo........oooOO0OOooo........oo    176 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
177                                                   177 
178 void G4eeToHadronsModel::SampleSecondaries(std    178 void G4eeToHadronsModel::SampleSecondaries(std::vector<G4DynamicParticle*>* newp,
179              const G4MaterialCutsCouple*,         179              const G4MaterialCutsCouple*,
180              const G4DynamicParticle* dParticl    180              const G4DynamicParticle* dParticle,
181              G4double,                            181              G4double,
182              G4double)                            182              G4double)
183 {                                                 183 {
184   G4double t = dParticle->GetKineticEnergy() +    184   G4double t = dParticle->GetKineticEnergy() + 2*electron_mass_c2;
185   G4LorentzVector inlv = dParticle->Get4Moment    185   G4LorentzVector inlv = dParticle->Get4Momentum() + 
186     G4LorentzVector(0.0,0.0,0.0,electron_mass_    186     G4LorentzVector(0.0,0.0,0.0,electron_mass_c2);
187   G4double e = inlv.m();                          187   G4double e = inlv.m();
188   G4ThreeVector inBoost = inlv.boostVector();     188   G4ThreeVector inBoost = inlv.boostVector();
189   //G4cout << "G4eeToHadronsModel::SampleSecon    189   //G4cout << "G4eeToHadronsModel::SampleSecondaries e= " << e 
190   //     << " " << inlv << " " << inBoost <<G4    190   //     << " " << inlv << " " << inBoost <<G4endl;
191   if(e > emin) {                                  191   if(e > emin) {
192     G4DynamicParticle* gamma = GenerateCMPhoto    192     G4DynamicParticle* gamma = GenerateCMPhoton(e);
193     G4LorentzVector gLv = gamma->Get4Momentum(    193     G4LorentzVector gLv = gamma->Get4Momentum();
194     G4LorentzVector lv(0.0,0.0,0.0,e);            194     G4LorentzVector lv(0.0,0.0,0.0,e);
195     lv -= gLv;                                    195     lv -= gLv;
196     G4double mass = lv.m();                       196     G4double mass = lv.m();
197     //G4cout << "mass= " << mass << " " << lv     197     //G4cout << "mass= " << mass << " " << lv << G4endl;
198     G4ThreeVector boost = lv.boostVector();       198     G4ThreeVector boost = lv.boostVector();
199     //G4cout << "mass= " << mass << " " << boo    199     //G4cout << "mass= " << mass << " " << boost << G4endl;
200     const G4ThreeVector dir = gamma->GetMoment    200     const G4ThreeVector dir = gamma->GetMomentumDirection();
201     model->SampleSecondaries(newp, mass, dir);    201     model->SampleSecondaries(newp, mass, dir);
202     std::size_t np = newp->size();             << 202     G4int np = newp->size();
203     for(std::size_t j=0; j<np; ++j) {          << 203     for(G4int j=0; j<np; ++j) {
204       G4DynamicParticle* dp = (*newp)[j];         204       G4DynamicParticle* dp = (*newp)[j];
205       G4LorentzVector v = dp->Get4Momentum();     205       G4LorentzVector v = dp->Get4Momentum();
206       v.boost(boost);                             206       v.boost(boost);
207       //G4cout << j << ". " << v << G4endl;       207       //G4cout << j << ". " << v << G4endl;
208       v.boost(inBoost);                           208       v.boost(inBoost);
209       //G4cout << "   " << v << G4endl;           209       //G4cout << "   " << v << G4endl;
210       dp->Set4Momentum(v);                        210       dp->Set4Momentum(v);
211       t -= v.e();                                 211       t -= v.e();
212     }                                             212     }
213     //G4cout << "Gamma   " << gLv << G4endl;      213     //G4cout << "Gamma   " << gLv << G4endl;
214     gLv.boost(inBoost);                           214     gLv.boost(inBoost);
215     //G4cout << "        " << gLv << G4endl;      215     //G4cout << "        " << gLv << G4endl;
216     gamma->Set4Momentum(gLv);                     216     gamma->Set4Momentum(gLv);
217     t -= gLv.e();                                 217     t -= gLv.e();
218     newp->push_back(gamma);                       218     newp->push_back(gamma);
219     if(std::abs(t) > CLHEP::MeV) {                219     if(std::abs(t) > CLHEP::MeV) {
220       G4cout << "G4eeToHadronsModel::SampleSec    220       G4cout << "G4eeToHadronsModel::SampleSecondaries: Ebalance(MeV)= " 
221        << t/MeV << " primary 4-momentum: " <<     221        << t/MeV << " primary 4-momentum: " << inlv <<  G4endl;
222     }                                             222     }
223   }                                               223   }
224 }                                                 224 }
225                                                   225 
226 //....oooOO0OOooo........oooOO0OOooo........oo    226 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
227                                                   227 
228 void G4eeToHadronsModel::ComputeCMCrossSection    228 void G4eeToHadronsModel::ComputeCMCrossSectionPerElectron()
229 {                                                 229 {
230   for(G4int i=0; i<nbins; i++) {                  230   for(G4int i=0; i<nbins; i++) {
231     G4double e  = crossPerElectron->Energy(i);    231     G4double e  = crossPerElectron->Energy(i);
232     G4double cs = 0.0;                            232     G4double cs = 0.0;
233     if(i > 0) {                                   233     if(i > 0) {
234       G4double LL   = 2.0*G4Log(e/electron_mas    234       G4double LL   = 2.0*G4Log(e/electron_mass_c2);
235       G4double bt  = 2.0*fine_structure_const*    235       G4double bt  = 2.0*fine_structure_const*(LL - 1.0)/pi;
236       G4double btm1= bt - 1.0;                    236       G4double btm1= bt - 1.0;
237       G4double del = 1. + fine_structure_const    237       G4double del = 1. + fine_structure_const*(1.5*LL + pi*pi/3. -2.)/pi;
238       G4double s1  = crossBornPerElectron->Val    238       G4double s1  = crossBornPerElectron->Value(e);
239       G4double e1  = crossPerElectron->Energy(    239       G4double e1  = crossPerElectron->Energy(i-1);
240       G4double x1  = 1. - e1/e;                   240       G4double x1  = 1. - e1/e;
241       cs += s1*(del*G4Exp(G4Log(x1)*bt) - bt*(    241       cs += s1*(del*G4Exp(G4Log(x1)*bt) - bt*(x1 - 0.25*x1*x1));
242       if(i > 1) {                                 242       if(i > 1) {
243   G4double e2  = e1;                              243   G4double e2  = e1;
244   G4double x2  = x1;                              244   G4double x2  = x1;
245   G4double s2  = crossBornPerElectron->Value(e    245   G4double s2  = crossBornPerElectron->Value(e2);
246   G4double w2  = bt*(del*G4Exp(G4Log(x2)*btm1)    246   G4double w2  = bt*(del*G4Exp(G4Log(x2)*btm1) - 1.0 + 0.5*x2);
247         G4double w1;                              247         G4double w1;      
248                                                   248 
249   for(G4int j=i-2; j>=0; --j) {                   249   for(G4int j=i-2; j>=0; --j) {
250     e1  = crossPerElectron->Energy(j);            250     e1  = crossPerElectron->Energy(j);
251     x1  = 1. - e1/e;                              251     x1  = 1. - e1/e;
252     s1  = crossBornPerElectron->Value(e1);        252     s1  = crossBornPerElectron->Value(e1);
253     w1  = bt*(del*G4Exp(G4Log(x1)*btm1) - 1.0     253     w1  = bt*(del*G4Exp(G4Log(x1)*btm1) - 1.0 + 0.5*x1);
254     cs += 0.5*(x1 - x2)*(w2*s2 + w1*s1);          254     cs += 0.5*(x1 - x2)*(w2*s2 + w1*s1);
255     e2 = e1;                                      255     e2 = e1;
256     x2 = x1;                                      256     x2 = x1;
257     s2 = s1;                                      257     s2 = s1;
258     w2 = w1;                                      258     w2 = w1;
259   }                                               259   }
260       }                                           260       }
261     }                                             261     }
262     crossPerElectron->PutValue(i, cs);            262     crossPerElectron->PutValue(i, cs);
263   }                                               263   }
264 }                                                 264 }
265                                                   265 
266 //....oooOO0OOooo........oooOO0OOooo........oo    266 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
267                                                   267 
268 G4DynamicParticle* G4eeToHadronsModel::Generat    268 G4DynamicParticle* G4eeToHadronsModel::GenerateCMPhoton(G4double e)
269 {                                                 269 {
270   G4double x;                                     270   G4double x;
271   G4DynamicParticle* gamma = nullptr;             271   G4DynamicParticle* gamma = nullptr;
272   G4double LL   = 2.0*G4Log(e/electron_mass_c2    272   G4double LL   = 2.0*G4Log(e/electron_mass_c2);
273   G4double bt  = 2.0*fine_structure_const*(LL     273   G4double bt  = 2.0*fine_structure_const*(LL - 1.)/pi;
274   G4double btm1= bt - 1.0;                        274   G4double btm1= bt - 1.0;
275   G4double del = 1. + fine_structure_const*(1.    275   G4double del = 1. + fine_structure_const*(1.5*LL + pi*pi/3. -2.)/pi;
276                                                   276 
277   G4double s0 = crossBornPerElectron->Value(e)    277   G4double s0 = crossBornPerElectron->Value(e);
278   G4double de = (emax - emin)/(G4double)nbins;    278   G4double de = (emax - emin)/(G4double)nbins;
279   G4double xmax = 0.5*(1.0 - (emin*emin)/(e*e)    279   G4double xmax = 0.5*(1.0 - (emin*emin)/(e*e));
280   G4double xmin = std::min(de/e, xmax);           280   G4double xmin = std::min(de/e, xmax);
281   G4double ds = s0*(del*G4Exp(G4Log(xmin)*bt)     281   G4double ds = s0*(del*G4Exp(G4Log(xmin)*bt) - bt*(xmin - 0.25*xmin*xmin));
282   G4double e1 = e*(1. - xmin);                    282   G4double e1 = e*(1. - xmin);
283                                                   283   
284   //G4cout << "e1= " << e1 << G4endl;             284   //G4cout << "e1= " << e1 << G4endl;
285   if(e1 < emax && s0*G4UniformRand()<ds) {        285   if(e1 < emax && s0*G4UniformRand()<ds) { 
286     x = xmin*G4Exp(G4Log(G4UniformRand())/bt);    286     x = xmin*G4Exp(G4Log(G4UniformRand())/bt);
287   } else {                                        287   } else {    
288                                                   288 
289     x = xmin;                                     289     x = xmin;
290     G4double s1 = crossBornPerElectron->Value(    290     G4double s1 = crossBornPerElectron->Value(e1);
291     G4double w1 = bt*(del*G4Exp(G4Log(x)*btm1)    291     G4double w1 = bt*(del*G4Exp(G4Log(x)*btm1) - 1.0 + 0.5*x);
292     G4double grej = s1*w1;                        292     G4double grej = s1*w1;
293     G4double f;                                   293     G4double f;
294     /*                                            294     /*
295      G4cout << "e(GeV)= " << e/GeV << " epeak(    295      G4cout << "e(GeV)= " << e/GeV << " epeak(GeV)= " << epeak/GeV 
296            << " s1= " << s1 << " w1= " << w1      296            << " s1= " << s1 << " w1= " << w1 
297            << " grej= " << grej << G4endl;        297            << " grej= " << grej << G4endl;
298     */                                            298     */
299     // Above emax cross section is const          299     // Above emax cross section is const
300     if(e1 > emax) {                               300     if(e1 > emax) {
301       x  = 0.5*(1. - (emax*emax)/(e*e));          301       x  = 0.5*(1. - (emax*emax)/(e*e));
302       G4double s2 = crossBornPerElectron->Valu    302       G4double s2 = crossBornPerElectron->Value(emax);
303       G4double w2 = bt*(del*G4Exp(G4Log(x)*btm    303       G4double w2 = bt*(del*G4Exp(G4Log(x)*btm1) - 1.0 + 0.5*x);
304       grej = s2*w2;                               304       grej = s2*w2;
305       //G4cout << "emax= " << emax << " s2= "     305       //G4cout << "emax= " << emax << " s2= " << s2 << " w2= " << w2 
306       // << " grej= " << grej << G4endl;          306       // << " grej= " << grej << G4endl;
307     }                                             307     }
308                                                   308 
309     if(e1 > epeak) {                              309     if(e1 > epeak) {
310       x = 0.5*(1.0 - (epeak*epeak)/(e*e));        310       x = 0.5*(1.0 - (epeak*epeak)/(e*e));
311       G4double s2 = crossBornPerElectron->Valu    311       G4double s2 = crossBornPerElectron->Value(epeak);
312       G4double w2 = bt*(del*G4Exp(G4Log(x)*btm    312       G4double w2 = bt*(del*G4Exp(G4Log(x)*btm1) - 1.0 + 0.5*x);
313       grej = std::max(grej,s2*w2);                313       grej = std::max(grej,s2*w2);
314       //G4cout << "epeak= " << epeak << " s2=     314       //G4cout << "epeak= " << epeak << " s2= " << s2 << " w2= " << w2 
315       //     << " grej= " << grej << G4endl;      315       //     << " grej= " << grej << G4endl;
316     }                                             316     }
317     G4int ii = 0;                                 317     G4int ii = 0;
318     const G4int iimax = 1000;                     318     const G4int iimax = 1000;
319     do {                                          319     do {
320       x = xmin + G4UniformRand()*(xmax - xmin)    320       x = xmin + G4UniformRand()*(xmax - xmin);
321                                                   321       
322       G4double s2 = crossBornPerElectron->Valu    322       G4double s2 = crossBornPerElectron->Value(sqrt(1.0 - 2*x)*e);
323       G4double w2 = bt*(del*G4Exp(G4Log(x)*btm    323       G4double w2 = bt*(del*G4Exp(G4Log(x)*btm1) - 1.0 + 0.5*x);
324       /*                                          324       /*
325       G4cout << "x= " << x << " xmin= " << xmi    325       G4cout << "x= " << x << " xmin= " << xmin << " xmax= " << xmax
326            << " s2= " << s2 << " w2= " << w2 <    326            << " s2= " << s2 << " w2= " << w2 << G4endl;
327       */                                          327       */
328       f = s2*w2;                                  328       f = s2*w2;
329       if(f > grej) {                              329       if(f > grej) {
330   G4cout << "G4DynamicParticle* G4eeToHadronsM    330   G4cout << "G4DynamicParticle* G4eeToHadronsModel:WARNING "
331          << f << " > " << grej << " majorant i    331          << f << " > " << grej << " majorant is`small!" 
332          << G4endl;                               332          << G4endl; 
333       }                                           333       }
334       if(++ii >= iimax) { break; }                334       if(++ii >= iimax) { break; }
335       // Loop checking, 07-Aug-2015, Vladimir     335       // Loop checking, 07-Aug-2015, Vladimir Ivanchenko
336     } while (f < grej*G4UniformRand());           336     } while (f < grej*G4UniformRand());
337   }                                               337   }
338                                                   338 
339   G4ThreeVector dir(0.0,0.0,1.0);                 339   G4ThreeVector dir(0.0,0.0,1.0);
340   if(G4UniformRand() > 0.5) { dir.set(0.0,0.0,    340   if(G4UniformRand() > 0.5) { dir.set(0.0,0.0,-1.0); }
341   //G4cout << "Egamma(MeV)= " << x*e <<  " " <    341   //G4cout << "Egamma(MeV)= " << x*e <<  " " << dir << G4endl; 
342   gamma = new G4DynamicParticle(theGamma,dir,x    342   gamma = new G4DynamicParticle(theGamma,dir,x*e);
343   return gamma;                                   343   return gamma;
344 }                                                 344 }
345                                                   345 
346 //....oooOO0OOooo........oooOO0OOooo........oo    346 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
347                                                   347