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Geant4/processes/electromagnetic/standard/src/G4WentzelOKandVIxSection.cc

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Differences between /processes/electromagnetic/standard/src/G4WentzelOKandVIxSection.cc (Version 11.3.0) and /processes/electromagnetic/standard/src/G4WentzelOKandVIxSection.cc (Version 10.1.p1)


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                                                   >>  26 // $Id: G4WentzelOKandVIxSection.cc 85306 2014-10-27 14:17:47Z gcosmo $
 26 //                                                 27 //
 27 // -------------------------------------------     28 // -------------------------------------------------------------------
 28 //                                                 29 //
 29 // GEANT4 Class file                               30 // GEANT4 Class file
 30 //                                                 31 //
 31 //                                                 32 //
 32 // File name:   G4WentzelOKandVIxSection           33 // File name:   G4WentzelOKandVIxSection
 33 //                                                 34 //
 34 // Author:      V.Ivanchenko                       35 // Author:      V.Ivanchenko 
 35 //                                                 36 //
 36 // Creation date: 09.04.2008 from G4MuMscModel     37 // Creation date: 09.04.2008 from G4MuMscModel
 37 //                                                 38 //
 38 // Modifications:                                  39 // Modifications:
 39 //                                                 40 //
 40 // -------------------------------------------     41 // -------------------------------------------------------------------
 41 //                                                 42 //
 42                                                    43 
 43 //....oooOO0OOooo........oooOO0OOooo........oo     44 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 44 //....oooOO0OOooo........oooOO0OOooo........oo     45 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 45                                                    46 
 46 #include "G4WentzelOKandVIxSection.hh"             47 #include "G4WentzelOKandVIxSection.hh"
 47 #include "G4ScreeningMottCrossSection.hh"      << 
 48 #include "G4PhysicalConstants.hh"                  48 #include "G4PhysicalConstants.hh"
 49 #include "G4SystemOfUnits.hh"                      49 #include "G4SystemOfUnits.hh"
 50 #include "Randomize.hh"                            50 #include "Randomize.hh"
 51 #include "G4Electron.hh"                           51 #include "G4Electron.hh"
 52 #include "G4Positron.hh"                           52 #include "G4Positron.hh"
 53 #include "G4Proton.hh"                             53 #include "G4Proton.hh"
 54 #include "G4EmParameters.hh"                       54 #include "G4EmParameters.hh"
 55 #include "G4Log.hh"                                55 #include "G4Log.hh"
 56 #include "G4Exp.hh"                                56 #include "G4Exp.hh"
 57 #include "G4AutoLock.hh"                       << 
 58                                                    57 
 59 //....oooOO0OOooo........oooOO0OOooo........oo     58 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 60                                                    59 
 61 G4double G4WentzelOKandVIxSection::ScreenRSqua     60 G4double G4WentzelOKandVIxSection::ScreenRSquareElec[] = {0.0};
 62 G4double G4WentzelOKandVIxSection::ScreenRSqua     61 G4double G4WentzelOKandVIxSection::ScreenRSquare[]     = {0.0};
 63 G4double G4WentzelOKandVIxSection::FormFactor[     62 G4double G4WentzelOKandVIxSection::FormFactor[]        = {0.0};
 64                                                    63 
 65 namespace                                      << 
 66 {                                              << 
 67   G4Mutex theWOKVIMutex = G4MUTEX_INITIALIZER; << 
 68 }                                              << 
 69                                                << 
 70 const G4double alpha2 = CLHEP::fine_structure_ << 
 71 const G4double factB1= 0.5*CLHEP::pi*CLHEP::fi << 
 72 const G4double numlimit = 0.1;                 << 
 73 const G4int nwarnlimit = 50;                   << 
 74                                                << 
 75 using namespace std;                               64 using namespace std;
 76                                                    65 
 77 G4WentzelOKandVIxSection::G4WentzelOKandVIxSec <<  66 G4WentzelOKandVIxSection::G4WentzelOKandVIxSection(G4bool combined) :
 78   temp(0.,0.,0.),                              <<  67   numlimit(0.1),
 79   isCombined(comb)                             <<  68   nwarnings(0),
                                                   >>  69   nwarnlimit(50),
                                                   >>  70   isCombined(combined),
                                                   >>  71   cosThetaMax(-1.0),
                                                   >>  72   alpha2(fine_structure_const*fine_structure_const)
 80 {                                                  73 {
 81   fNistManager = G4NistManager::Instance();        74   fNistManager = G4NistManager::Instance();
 82   fG4pow = G4Pow::GetInstance();                   75   fG4pow = G4Pow::GetInstance();
 83                                                << 
 84   theElectron = G4Electron::Electron();            76   theElectron = G4Electron::Electron();
 85   thePositron = G4Positron::Positron();            77   thePositron = G4Positron::Positron();
 86   theProton   = G4Proton::Proton();                78   theProton   = G4Proton::Proton();
                                                   >>  79   lowEnergyLimit = 1.0*eV;
                                                   >>  80   G4double p0 = electron_mass_c2*classic_electr_radius;
                                                   >>  81   coeff = twopi*p0*p0;
                                                   >>  82   particle = 0;
                                                   >>  83 
                                                   >>  84   // Thomas-Fermi screening radii
                                                   >>  85   // Formfactors from A.V. Butkevich et al., NIM A 488 (2002) 282
                                                   >>  86 
                                                   >>  87   if(0.0 == ScreenRSquare[0]) {
                                                   >>  88     G4double a0 = electron_mass_c2/0.88534; 
                                                   >>  89     G4double constn = 6.937e-6/(MeV*MeV);
                                                   >>  90 
                                                   >>  91     ScreenRSquare[0] = alpha2*a0*a0;
                                                   >>  92     ScreenRSquareElec[0] = ScreenRSquare[0];
                                                   >>  93     for(G4int j=1; j<100; ++j) {
                                                   >>  94       G4double x = a0*fG4pow->Z13(j);
                                                   >>  95       if(1 == j) { ScreenRSquare[j] = 0.5*alpha2*a0*a0; }
                                                   >>  96       else {
                                                   >>  97   ScreenRSquare[j] = 0.5*(1 + G4Exp(-j*j*0.001))*alpha2*x*x;
                                                   >>  98   ScreenRSquareElec[j] = 0.5*alpha2*x*x;
                                                   >>  99       }
                                                   >> 100       x = fNistManager->GetA27(j);
                                                   >> 101       FormFactor[j] = constn*x*x;
                                                   >> 102     } 
                                                   >> 103   }
                                                   >> 104   currentMaterial = 0;
                                                   >> 105   factB = factD = formfactA = screenZ = 0.0;
                                                   >> 106   cosTetMaxElec = cosTetMaxNuc = invbeta2 = kinFactor = gam0pcmp = pcmp2 = 1.0;
                                                   >> 107 
                                                   >> 108   factB1= 0.5*CLHEP::pi*fine_structure_const;
 87                                                   109 
 88   G4double p0 = CLHEP::electron_mass_c2*CLHEP: << 110   tkin = mom2 = momCM2 = factorA2 = mass = spin = chargeSquare = charge3 = 0.0;
 89   coeff = CLHEP::twopi*p0*p0;                  << 111   ecut = etag = DBL_MAX;
 90   targetMass = CLHEP::proton_mass_c2;          << 112   targetZ = 0;
                                                   >> 113   targetMass = proton_mass_c2;
                                                   >> 114   particle = 0;
 91 }                                                 115 }
 92                                                   116 
 93 //....oooOO0OOooo........oooOO0OOooo........oo    117 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 94                                                   118 
 95 G4WentzelOKandVIxSection::~G4WentzelOKandVIxSe    119 G4WentzelOKandVIxSection::~G4WentzelOKandVIxSection()
 96 {                                              << 120 {}
 97   delete fMottXSection;                        << 
 98 }                                              << 
 99                                                   121 
100 //....oooOO0OOooo........oooOO0OOooo........oo    122 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
101                                                   123 
102 void G4WentzelOKandVIxSection::Initialise(cons    124 void G4WentzelOKandVIxSection::Initialise(const G4ParticleDefinition* p, 
103                                           G4do << 125             G4double cosThetaLim)
104 {                                                 126 {
105   SetupParticle(p);                               127   SetupParticle(p);
106   tkin = mom2 = momCM2 = 0.0;                     128   tkin = mom2 = momCM2 = 0.0;
107   ecut = etag = DBL_MAX;                          129   ecut = etag = DBL_MAX;
108   targetZ = 0;                                    130   targetZ = 0;
109                                                   131 
110   // cosThetaMax is below 1.0 only when MSC is    132   // cosThetaMax is below 1.0 only when MSC is combined with SS
111   if(isCombined) { cosThetaMax = cosThetaLim;  << 133   if(isCombined) { cosThetaMax = cosThetaLim; }
112   G4EmParameters* param = G4EmParameters::Inst << 134   
113   G4double a = param->FactorForAngleLimit()*CL << 135   G4double a = G4EmParameters::Instance()->FactorForAngleLimit()
                                                   >> 136     *CLHEP::hbarc/CLHEP::fermi;
114   factorA2 = 0.5*a*a;                             137   factorA2 = 0.5*a*a;
115   currentMaterial = nullptr;                   << 138   currentMaterial = 0;
116                                                << 139   
117   fNucFormfactor = param->NuclearFormfactorTyp << 140   //G4cout << "G4WentzelOKandVIxSection::Initialise  mass= " << mass
118   if(0.0 == ScreenRSquare[0]) { InitialiseA(); << 141   //   << "  " << p->GetParticleName() 
119                                                << 142   //     << "  cosThetaMax= " << cosThetaMax << G4endl; 
120   // Mott corrections always added             << 143   
121   if((p == theElectron || p == thePositron) && << 
122     fMottXSection = new G4ScreeningMottCrossSe << 
123     fMottXSection->Initialise(p, 1.0);         << 
124   }                                            << 
125   /*                                           << 
126   G4cout << "G4WentzelOKandVIxSection::Initial << 
127    << p->GetParticleName() << " cosThetaMax= " << 
128    << "  " << ScreenRSquare[0] << " coeff= " < << 
129   */                                           << 
130 }                                              << 
131                                                << 
132 //....oooOO0OOooo........oooOO0OOooo........oo << 
133                                                << 
134 void G4WentzelOKandVIxSection::InitialiseA()   << 
135 {                                              << 
136   // Thomas-Fermi screening radii              << 
137   // Formfactors from A.V. Butkevich et al., N << 
138   if(0.0 != ScreenRSquare[0]) { return; }      << 
139   G4AutoLock l(&theWOKVIMutex);                << 
140   if(0.0 == ScreenRSquare[0]) {                << 
141     const G4double invmev2 = 1./(CLHEP::MeV*CL << 
142     G4double a0 = CLHEP::electron_mass_c2/0.88 << 
143     G4double constn = 6.937e-6*invmev2;        << 
144     G4double fct = G4EmParameters::Instance()- << 
145                                                << 
146     G4double afact = 0.5*fct*alpha2*a0*a0;     << 
147     ScreenRSquare[0] = afact;                  << 
148     ScreenRSquare[1] = afact;                  << 
149     ScreenRSquareElec[1] = afact;              << 
150     FormFactor[1] = 3.097e-6*invmev2;          << 
151                                                << 
152     for(G4int j=2; j<100; ++j) {               << 
153       G4double x = fG4pow->Z13(j);             << 
154       ScreenRSquare[j] = afact*(1 + G4Exp(-j*j << 
155       ScreenRSquareElec[j] = afact*x*x;        << 
156       x = fNistManager->GetA27(j);             << 
157       FormFactor[j] = constn*x*x;              << 
158     }                                          << 
159   }                                            << 
160   l.unlock();                                  << 
161 }                                                 144 }
162                                                   145 
163 //....oooOO0OOooo........oooOO0OOooo........oo    146 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
164                                                   147 
165 void G4WentzelOKandVIxSection::SetupParticle(c    148 void G4WentzelOKandVIxSection::SetupParticle(const G4ParticleDefinition* p)
166 {                                                 149 {
167   particle = p;                                   150   particle = p;
168   mass = particle->GetPDGMass();                  151   mass = particle->GetPDGMass();
169   spin = particle->GetPDGSpin();                  152   spin = particle->GetPDGSpin();
170   if(0.0 != spin) { spin = 0.5; }                 153   if(0.0 != spin) { spin = 0.5; }
171   G4double q = std::abs(particle->GetPDGCharge << 154   G4double q = std::fabs(particle->GetPDGCharge()/eplus);
172   chargeSquare = q*q;                             155   chargeSquare = q*q;
173   charge3 = chargeSquare*q;                       156   charge3 = chargeSquare*q;
174   tkin = 0.0;                                     157   tkin = 0.0;
175   currentMaterial = nullptr;                   << 158   currentMaterial = 0;
176   targetZ = 0;                                    159   targetZ = 0;
177 }                                                 160 }
178                                                   161 
179 //....oooOO0OOooo........oooOO0OOooo........oo    162 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
180                                                << 
181 G4double                                       << 
182 G4WentzelOKandVIxSection::SetupKinematic(G4dou << 
183 {                                              << 
184   if(ekin != tkin || mat != currentMaterial) { << 
185     currentMaterial = mat;                     << 
186     tkin  = ekin;                              << 
187     mom2  = tkin*(tkin + 2.0*mass);            << 
188     invbeta2 = 1.0 +  mass*mass/mom2;          << 
189     factB = spin/invbeta2;                     << 
190     cosTetMaxNuc = isCombined ?                << 
191       std::max(cosThetaMax, 1.-factorA2*mat->G << 
192       : cosThetaMax;                           << 
193   }                                            << 
194   return cosTetMaxNuc;                         << 
195 }                                              << 
196                                                << 
197 //....oooOO0OOooo........oooOO0OOooo........oo << 
198                                                   163   
199 G4double                                          164 G4double
200 G4WentzelOKandVIxSection::SetupTarget(G4int Z,    165 G4WentzelOKandVIxSection::SetupTarget(G4int Z, G4double cut)
201 {                                                 166 {
202   G4double cosTetMaxNuc2 = cosTetMaxNuc;          167   G4double cosTetMaxNuc2 = cosTetMaxNuc;
203   if(Z != targetZ || tkin != etag) {              168   if(Z != targetZ || tkin != etag) {
204     etag    = tkin;                               169     etag    = tkin; 
205     targetZ = std::min(Z, 99);                 << 170     targetZ = Z;
206     G4double massT = (1 == Z) ? CLHEP::proton_ << 171     if(targetZ > 99) { targetZ = 99; }
207       fNistManager->GetAtomicMassAmu(Z)*CLHEP: << 172     G4double massT = proton_mass_c2;
                                                   >> 173     if(targetZ > 1) { 
                                                   >> 174       massT = fNistManager->GetAtomicMassAmu(targetZ)*CLHEP::amu_c2;
                                                   >> 175     }
208     SetTargetMass(massT);                         176     SetTargetMass(massT);
209                                                   177 
210     kinFactor = coeff*Z*chargeSquare*invbeta2/    178     kinFactor = coeff*Z*chargeSquare*invbeta2/mom2;
211     if(particle == theElectron && fMottXSectio << 
212       fMottFactor = (1.0 + 2.0e-4*Z*Z);        << 
213     }                                          << 
214                                                   179 
215     if(1 == Z) {                                  180     if(1 == Z) {
216       screenZ = ScreenRSquare[targetZ]/mom2;      181       screenZ = ScreenRSquare[targetZ]/mom2;
217     } else if(mass > MeV) {                       182     } else if(mass > MeV) {
218       screenZ = std::min(Z*1.13,1.13 +3.76*Z*Z    183       screenZ = std::min(Z*1.13,1.13 +3.76*Z*Z*invbeta2*alpha2*chargeSquare)*
219         ScreenRSquare[targetZ]/mom2;           << 184   ScreenRSquare[targetZ]/mom2;
220     } else {                                      185     } else {
221       G4double tau = tkin/mass;                   186       G4double tau = tkin/mass;
222       screenZ = std::min(Z*1.13,(1.13 +3.76*Z*    187       screenZ = std::min(Z*1.13,(1.13 +3.76*Z*Z
223           *invbeta2*alpha2*std::sqrt(tau/(tau  << 188     *invbeta2*alpha2*std::sqrt(tau/(tau + fG4pow->Z23(targetZ)))))*
224         ScreenRSquareElec[targetZ]/mom2;       << 189   ScreenRSquareElec[targetZ]/mom2;
225     }                                             190     }
226     if(targetZ == 1 && particle == theProton & << 191     if(targetZ == 1 && cosTetMaxNuc2 < 0.0 && particle == theProton) {
227       cosTetMaxNuc2 = 0.0;                        192       cosTetMaxNuc2 = 0.0;
228     }                                             193     }
229     formfactA = FormFactor[targetZ]*mom2;         194     formfactA = FormFactor[targetZ]*mom2;
230                                                   195 
231     cosTetMaxElec = 1.0;                          196     cosTetMaxElec = 1.0;
232     ComputeMaxElectronScattering(cut);            197     ComputeMaxElectronScattering(cut); 
233   }                                               198   }
234   //G4cout << "SetupTarget:  Z= " << targetZ < << 
235   //   << " fMottFactor= " << fMottFactor << " << 
236   return cosTetMaxNuc2;                           199   return cosTetMaxNuc2;
237 }                                                 200 } 
238                                                   201 
239 //....oooOO0OOooo........oooOO0OOooo........oo    202 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
240                                                   203 
241 G4double                                          204 G4double 
242 G4WentzelOKandVIxSection::ComputeTransportCros    205 G4WentzelOKandVIxSection::ComputeTransportCrossSectionPerAtom(G4double cosTMax)
243 {                                                 206 {
244   G4double xSection = 0.0;                        207   G4double xSection = 0.0;
245   if(cosTMax >= 1.0) { return xSection; }         208   if(cosTMax >= 1.0) { return xSection; }
                                                   >> 209  
                                                   >> 210   G4double x = 0; 
                                                   >> 211   G4double y = 0;
                                                   >> 212   G4double x1= 0;
                                                   >> 213   G4double x2= 0;
                                                   >> 214   G4double xlog = 0.0;
246                                                   215 
247   G4double costm = std::max(cosTMax,cosTetMaxE    216   G4double costm = std::max(cosTMax,cosTetMaxElec); 
248   G4double fb = screenZ*factB;                    217   G4double fb = screenZ*factB;
249                                                   218 
250   // scattering off electrons                     219   // scattering off electrons
251   if(costm < 1.0) {                               220   if(costm < 1.0) {
252     G4double x = (1.0 - costm)/screenZ;        << 221     x = (1.0 - costm)/screenZ;
253     if(x < numlimit) {                            222     if(x < numlimit) { 
254       G4double x2 = 0.5*x*x;                   << 223       x2 = 0.5*x*x;
255       xSection = x2*((1.0 - 1.3333333*x + 3*x2 << 224       y  = x2*(1.0 - 1.3333333*x + 3*x2);
                                                   >> 225       if(0.0 < factB) { y -= fb*x2*x*(0.6666667 - x); }
256     } else {                                      226     } else { 
257       G4double x1= x/(1 + x);                  << 227       x1= x/(1 + x);
258       G4double xlog = G4Log(1.0 + x);          << 228       xlog = G4Log(1.0 + x);  
259       xSection = xlog - x1 - fb*(x + x1 - 2*xl << 229       y = xlog - x1; 
                                                   >> 230       if(0.0 < factB) { y -= fb*(x + x1 - 2*xlog); }
260     }                                             231     }
261                                                   232 
262     if(xSection < 0.0) {                       << 233     if(y < 0.0) {
263       ++nwarnings;                                234       ++nwarnings;
264       if(nwarnings < nwarnlimit) {                235       if(nwarnings < nwarnlimit) {
265         G4cout << "G4WentzelOKandVIxSection::C << 236   G4cout << "G4WentzelOKandVIxSection::ComputeTransportCrossSectionPerAtom"
266                << " scattering on e- <0"       << 237          << " scattering on e- <0"
267                << G4endl;                      << 238          << G4endl;
268         G4cout << "cross= " << xSection        << 239   G4cout << "y= " << y 
269                << " e(MeV)= " << tkin << " p(M << 240          << " e(MeV)= " << tkin << " p(MeV/c)= " << sqrt(mom2) 
270                << " Z= " << targetZ << "  "    << 241          << " Z= " << targetZ << "  " 
271                << particle->GetParticleName()  << 242          << particle->GetParticleName() << G4endl;
272         G4cout << " 1-costm= " << 1.0-costm << << 243   G4cout << " 1-costm= " << 1.0-costm << " screenZ= " << screenZ 
273                << " x= " << x << G4endl;       << 244          << " x= " << x << G4endl;
274       }                                           245       }
275       xSection = 0.0;                          << 246       y = 0.0;
276     }                                             247     }
                                                   >> 248     xSection = y;
277   }                                               249   }
278   /*                                           << 250   /* 
279       G4cout << "G4WentzelOKandVIxSection::Com << 251        G4cout << "G4WentzelVI:XS per A " << " Z= " << targetZ 
280       << " Z= " << targetZ                     << 252        << " e(MeV)= " << tkin/MeV << " XSel= " << xSection
281       << " e(MeV)= " << tkin/MeV << " XSel= "  << 253    << " cut(MeV)= " << ecut/MeV  
282       << " zmaxE= " << (1.0 - cosTetMaxElec)/s << 254      << " zmaxE= " << (1.0 - cosTetMaxElec)/screenZ 
283       << " zmaxN= " << (1.0 - cosThetaMax)/scr << 255    << " zmaxN= " << (1.0 - cosThetaMax)/screenZ 
284       << " 1-costm= " << 1.0 - cosThetaMax <<  << 256          << " 1-costm= " << 1.0 - cosThetaMax << G4endl;
285   */                                              257   */
286   // scattering off nucleus                       258   // scattering off nucleus
287   if(cosTMax < 1.0) {                             259   if(cosTMax < 1.0) {
288     G4double x = (1.0 - cosTMax)/screenZ;      << 260     x = (1.0 - cosTMax)/screenZ;
289     G4double y;                                << 
290     if(x < numlimit) {                            261     if(x < numlimit) { 
291       G4double x2 = 0.5*x*x;                   << 262       x2 = 0.5*x*x;
292       y = x2*((1.0 - 1.3333333*x + 3*x2) - fb* << 263       y  = x2*(1.0 - 1.3333333*x + 3*x2); 
                                                   >> 264       if(0.0 < factB) { y -= fb*x2*x*(0.6666667 - x); }
293     } else {                                      265     } else { 
294       G4double x1= x/(1 + x);                  << 266       x1= x/(1 + x);
295       G4double xlog = G4Log(1.0 + x);          << 267       xlog = G4Log(1.0 + x);  
296       y = xlog - x1 - fb*(x + x1 - 2*xlog);    << 268       y = xlog - x1; 
                                                   >> 269       if(0.0 < factB) { y -= fb*(x + x1 - 2*xlog); }
297     }                                             270     }
298                                                   271 
299     if(y < 0.0) {                                 272     if(y < 0.0) {
300       ++nwarnings;                                273       ++nwarnings;
301       if(nwarnings < nwarnlimit) {                274       if(nwarnings < nwarnlimit) {
302         G4cout << "G4WentzelOKandVIxSection::C << 275   G4cout << "G4WentzelOKandVIxSection::ComputeTransportCrossSectionPerAtom"
303                << " scattering on nucleus <0"  << 276          << " scattering on nucleus <0"
304                << G4endl;                      << 277          << G4endl;
305         G4cout << "y= " << y                   << 278   G4cout << "y= " << y 
306                << " e(MeV)= " << tkin << " Z=  << 279          << " e(MeV)= " << tkin << " Z= " << targetZ << "  " 
307                << particle->GetParticleName()  << 280          << particle->GetParticleName() << G4endl;
308         G4cout << " formfactA= " << formfactA  << 281   G4cout << " formfactA= " << formfactA << " screenZ= " << screenZ 
309                << " x= " << x <<G4endl;        << 282          << " x= " << " x1= " << x1 <<G4endl;
310       }                                           283       }
311       y = 0.0;                                    284       y = 0.0;
312     }                                             285     }
313     xSection += y*targetZ;                        286     xSection += y*targetZ; 
314   }                                               287   }
315   xSection *= kinFactor;                          288   xSection *= kinFactor;
316                                                   289  
317   /*                                           << 290   /*
318   G4cout << "Z= " << targetZ << " XStot= " <<     291   G4cout << "Z= " << targetZ << " XStot= " << xSection/barn 
319          << " screenZ= " << screenZ << " formF << 292    << " screenZ= " << screenZ << " formF= " << formfactA 
320          << " for " << particle->GetParticleNa << 293    << " for " << particle->GetParticleName() 
321    << " m= " << mass << " 1/v= " << sqrt(invbe << 294      << " m= " << mass << " 1/v= " << sqrt(invbeta2) << " p= " << sqrt(mom2)
322    << " p= " << sqrt(mom2)                     << 295    << " x= " << x 
323          << " x= " << x << G4endl;             << 296    << G4endl;
324   */                                              297   */
325   return xSection;                                298   return xSection; 
326 }                                                 299 }
327                                                   300 
328 //....oooOO0OOooo........oooOO0OOooo........oo    301 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
329                                                   302 
330 G4ThreeVector&                                    303 G4ThreeVector&
331 G4WentzelOKandVIxSection::SampleSingleScatteri    304 G4WentzelOKandVIxSection::SampleSingleScattering(G4double cosTMin,
332                                                << 305              G4double cosTMax,
333                                                << 306              G4double elecRatio)
334 {                                                 307 {
335   temp.set(0.0,0.0,1.0);                          308   temp.set(0.0,0.0,1.0);
336   CLHEP::HepRandomEngine* rndmEngineMod = G4Ra << 
337                                                   309  
338   G4double formf = formfactA;                     310   G4double formf = formfactA;
339   G4double cost1 = cosTMin;                       311   G4double cost1 = cosTMin;
340   G4double cost2 = cosTMax;                       312   G4double cost2 = cosTMax;
341   if(elecRatio > 0.0) {                           313   if(elecRatio > 0.0) {
342     if(rndmEngineMod->flat() <= elecRatio) {   << 314     if(G4UniformRand() <= elecRatio) {
343       formf = 0.0;                                315       formf = 0.0;
344       cost1 = std::max(cost1,cosTetMaxElec);      316       cost1 = std::max(cost1,cosTetMaxElec);
345       cost2 = std::max(cost2,cosTetMaxElec);      317       cost2 = std::max(cost2,cosTetMaxElec);
346     }                                             318     }
347   }                                               319   }
348   if(cost1 > cost2) {                             320   if(cost1 > cost2) {
349     G4double w1 = 1. - cost1;                  << 321     G4double z1, z2;
350     G4double w2 = 1. - cost2;                  << 322     G4double w1 = 1. - cost1 + screenZ;
351     G4double w3 = rndmEngineMod->flat()*(w2 -  << 323     G4double w2 = 1. - cost2 + screenZ;
352     G4double z1 = ((w2 - w3)*screenZ + w1*w2)/ << 324     do {
353     G4double fm = 1.0;                         << 325       z1 = w1*w2/(w1 + G4UniformRand()*(w2 - w1)) - screenZ;
354                                                << 326       z2 = 1. - z1*factB + factB1*targetZ*sqrt(z1*factB)*(2 - z1);
355     if(fNucFormfactor == fExponentialNF) {     << 327     } while(G4UniformRand() > z2);
356       fm += formf*z1;                          << 328 
357       fm = 1.0/(fm*fm);                        << 329     G4double fm = 1.0 + formf*z1;
358     } else if(fNucFormfactor == fGaussianNF) { << 330     G4double grej = (1.0 + z1*factD)*fm*fm;
359       fm = G4Exp(-2*formf*z1);                 << 331 
360     } else if(fNucFormfactor == fFlatNF) {     << 332     if(G4UniformRand()*grej < 1.0) {
361       static const G4double ccoef = 0.00508/CL << 333       // exclude "false" scattering due to formfactor
362       G4double x = std::sqrt(2.*mom2*z1)*ccoef << 
363       fm = FlatFormfactor(x);                  << 
364       fm *= FlatFormfactor(x*0.6*fG4pow->A13(f << 
365     }                                          << 
366     // G4cout << " fm=" << fm << "  " << fMott << 
367     G4double grej;                             << 
368     if(nullptr != fMottXSection) {             << 
369       fMottXSection->SetupKinematic(tkin, targ << 
370       grej = fMottXSection->RatioMottRutherfor << 
371     } else {                                   << 
372       grej = (1. - z1*factB + factB1*targetZ*s << 
373       *fm/(1.0 + z1*factD);                    << 
374     }                                          << 
375     if(fMottFactor*rndmEngineMod->flat() <= gr << 
376       // exclude "false" scattering due to for << 
377       G4double cost = 1.0 - z1;                   334       G4double cost = 1.0 - z1;
378       if(cost > 1.0)       { cost = 1.0; }        335       if(cost > 1.0)       { cost = 1.0; }
379       else if(cost < -1.0) { cost =-1.0; }        336       else if(cost < -1.0) { cost =-1.0; }
380       G4double sint = sqrt((1.0 - cost)*(1.0 +    337       G4double sint = sqrt((1.0 - cost)*(1.0 + cost));
381       //G4cout << "sint= " << sint << G4endl;     338       //G4cout << "sint= " << sint << G4endl;
382       G4double phi  = twopi*rndmEngineMod->fla << 339       G4double phi  = twopi*G4UniformRand();
383       temp.set(sint*cos(phi),sint*sin(phi),cos    340       temp.set(sint*cos(phi),sint*sin(phi),cost);
384     }                                             341     }
385   }                                               342   }
386   return temp;                                    343   return temp;
387 }                                                 344 }
388                                                   345 
389 //....oooOO0OOooo........oooOO0OOooo........oo    346 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
390                                                   347 
391 void                                              348 void 
392 G4WentzelOKandVIxSection::ComputeMaxElectronSc    349 G4WentzelOKandVIxSection::ComputeMaxElectronScattering(G4double cutEnergy)
393 {                                                 350 {
394   if(mass > MeV) {                                351   if(mass > MeV) {
395     G4double ratio = electron_mass_c2/mass;       352     G4double ratio = electron_mass_c2/mass;
396     G4double tau = tkin/mass;                     353     G4double tau = tkin/mass;
397     G4double tmax = 2.0*electron_mass_c2*tau*(    354     G4double tmax = 2.0*electron_mass_c2*tau*(tau + 2.)/
398       (1.0 + 2.0*ratio*(tau + 1.0) + ratio*rat    355       (1.0 + 2.0*ratio*(tau + 1.0) + ratio*ratio);
                                                   >> 356     //tmax = std::min(tmax, targetZ*targetZ*10*eV); 
399     cosTetMaxElec = 1.0 - std::min(cutEnergy,     357     cosTetMaxElec = 1.0 - std::min(cutEnergy, tmax)*electron_mass_c2/mom2;
400   } else {                                        358   } else {
401                                                   359 
402     G4double tmax = (particle == theElectron)  << 360     G4double tmax = tkin;
                                                   >> 361     if(particle == theElectron) { tmax *= 0.5; }
                                                   >> 362     //tmax = std::min(tmax, targetZ*targetZ*10*eV); 
403     G4double t = std::min(cutEnergy, tmax);       363     G4double t = std::min(cutEnergy, tmax);
404     G4double mom21 = t*(t + 2.0*electron_mass_    364     G4double mom21 = t*(t + 2.0*electron_mass_c2);
405     G4double t1 = tkin - t;                       365     G4double t1 = tkin - t;
406     //G4cout <<"tkin=" <<tkin<<" tmax= "<<tmax    366     //G4cout <<"tkin=" <<tkin<<" tmax= "<<tmax<<" t= " 
407     //<<t<< " t1= "<<t1<<" cut= "<<ecut<<G4end    367     //<<t<< " t1= "<<t1<<" cut= "<<ecut<<G4endl;
408     if(t1 > 0.0) {                                368     if(t1 > 0.0) {
409       G4double mom22 = t1*(t1 + 2.0*mass);        369       G4double mom22 = t1*(t1 + 2.0*mass);
410       G4double ctm = (mom2 + mom22 - mom21)*0.    370       G4double ctm = (mom2 + mom22 - mom21)*0.5/sqrt(mom2*mom22);
411       if(ctm <  1.0) { cosTetMaxElec = ctm; }     371       if(ctm <  1.0) { cosTetMaxElec = ctm; }
412       if(particle == theElectron && cosTetMaxE    372       if(particle == theElectron && cosTetMaxElec < 0.0) { 
413         cosTetMaxElec = 0.0;                   << 373   cosTetMaxElec = 0.0; 
414       }                                           374       }
415     }                                             375     }
416   }                                               376   }
417 }                                                 377 }
418                                                   378 
419 //....oooOO0OOooo........oooOO0OOooo........oo    379 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
420                                                   380 
421 G4double                                          381 G4double 
422 G4WentzelOKandVIxSection::ComputeSecondTranspo    382 G4WentzelOKandVIxSection::ComputeSecondTransportMoment(G4double /*CosThetaMax*/)
423 {                                                 383 {
424   return 0.0;                                     384   return 0.0;
425 }                                                 385 }
426                                                   386 
427 //....oooOO0OOooo........oooOO0OOooo........oo    387 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
428                                                   388