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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 10.2.p3)


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                                                   >>  26 // $Id: G4WentzelOKandVIxSection.cc 91726 2015-08-03 15:41:36Z 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   temp(0.,0.,0.),
 79   isCombined(comb)                             <<  68   numlimit(0.1),
                                                   >>  69   nwarnings(0),
                                                   >>  70   nwarnlimit(50),
                                                   >>  71   isCombined(combined),
                                                   >>  72   cosThetaMax(-1.0),
                                                   >>  73   alpha2(fine_structure_const*fine_structure_const)
 80 {                                                  74 {
 81   fNistManager = G4NistManager::Instance();        75   fNistManager = G4NistManager::Instance();
 82   fG4pow = G4Pow::GetInstance();                   76   fG4pow = G4Pow::GetInstance();
 83                                                << 
 84   theElectron = G4Electron::Electron();            77   theElectron = G4Electron::Electron();
 85   thePositron = G4Positron::Positron();            78   thePositron = G4Positron::Positron();
 86   theProton   = G4Proton::Proton();                79   theProton   = G4Proton::Proton();
                                                   >>  80   lowEnergyLimit = 1.0*eV;
                                                   >>  81   G4double p0 = electron_mass_c2*classic_electr_radius;
                                                   >>  82   coeff = twopi*p0*p0;
                                                   >>  83   particle = 0;
                                                   >>  84 
                                                   >>  85   // Thomas-Fermi screening radii
                                                   >>  86   // Formfactors from A.V. Butkevich et al., NIM A 488 (2002) 282
                                                   >>  87 
                                                   >>  88   if(0.0 == ScreenRSquare[0]) {
                                                   >>  89     G4double a0 = electron_mass_c2/0.88534; 
                                                   >>  90     G4double constn = 6.937e-6/(MeV*MeV);
                                                   >>  91 
                                                   >>  92     ScreenRSquare[0] = alpha2*a0*a0;
                                                   >>  93     ScreenRSquareElec[0] = ScreenRSquare[0];
                                                   >>  94     for(G4int j=1; j<100; ++j) {
                                                   >>  95       G4double x = a0*fG4pow->Z13(j);
                                                   >>  96       if(1 == j) { ScreenRSquare[j] = 0.5*alpha2*a0*a0; }
                                                   >>  97       else {
                                                   >>  98         ScreenRSquare[j] = 0.5*(1 + G4Exp(-j*j*0.001))*alpha2*x*x;
                                                   >>  99         ScreenRSquareElec[j] = 0.5*alpha2*x*x;
                                                   >> 100       }
                                                   >> 101       x = fNistManager->GetA27(j);
                                                   >> 102       FormFactor[j] = constn*x*x;
                                                   >> 103     } 
                                                   >> 104   }
                                                   >> 105   currentMaterial = 0;
                                                   >> 106   factB = factD = formfactA = screenZ = 0.0;
                                                   >> 107   cosTetMaxElec = cosTetMaxNuc = invbeta2 = kinFactor = gam0pcmp = pcmp2 = 1.0;
                                                   >> 108 
                                                   >> 109   factB1= 0.5*CLHEP::pi*fine_structure_const;
 87                                                   110 
 88   G4double p0 = CLHEP::electron_mass_c2*CLHEP: << 111   tkin = mom2 = momCM2 = factorA2 = mass = spin = chargeSquare = charge3 = 0.0;
 89   coeff = CLHEP::twopi*p0*p0;                  << 112   ecut = etag = DBL_MAX;
 90   targetMass = CLHEP::proton_mass_c2;          << 113   targetZ = 0;
                                                   >> 114   targetMass = proton_mass_c2;
                                                   >> 115   particle = 0;
 91 }                                                 116 }
 92                                                   117 
 93 //....oooOO0OOooo........oooOO0OOooo........oo    118 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 94                                                   119 
 95 G4WentzelOKandVIxSection::~G4WentzelOKandVIxSe    120 G4WentzelOKandVIxSection::~G4WentzelOKandVIxSection()
 96 {                                              << 121 {}
 97   delete fMottXSection;                        << 
 98 }                                              << 
 99                                                   122 
100 //....oooOO0OOooo........oooOO0OOooo........oo    123 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
101                                                   124 
102 void G4WentzelOKandVIxSection::Initialise(cons    125 void G4WentzelOKandVIxSection::Initialise(const G4ParticleDefinition* p, 
103                                           G4do    126                                           G4double cosThetaLim)
104 {                                                 127 {
105   SetupParticle(p);                               128   SetupParticle(p);
106   tkin = mom2 = momCM2 = 0.0;                     129   tkin = mom2 = momCM2 = 0.0;
107   ecut = etag = DBL_MAX;                          130   ecut = etag = DBL_MAX;
108   targetZ = 0;                                    131   targetZ = 0;
109                                                   132 
110   // cosThetaMax is below 1.0 only when MSC is    133   // cosThetaMax is below 1.0 only when MSC is combined with SS
111   if(isCombined) { cosThetaMax = cosThetaLim;  << 134   if(isCombined) { cosThetaMax = cosThetaLim; }
112   G4EmParameters* param = G4EmParameters::Inst << 135   
113   G4double a = param->FactorForAngleLimit()*CL << 136   G4double a = G4EmParameters::Instance()->FactorForAngleLimit()
                                                   >> 137     *CLHEP::hbarc/CLHEP::fermi;
114   factorA2 = 0.5*a*a;                             138   factorA2 = 0.5*a*a;
115   currentMaterial = nullptr;                   << 139   currentMaterial = 0;
116                                                << 140   
117   fNucFormfactor = param->NuclearFormfactorTyp << 141   //G4cout << "G4WentzelOKandVIxSection::Initialise  mass= " << mass
118   if(0.0 == ScreenRSquare[0]) { InitialiseA(); << 142   //         << "  " << p->GetParticleName() 
119                                                << 143   //     << "  cosThetaMax= " << cosThetaMax << G4endl; 
120   // Mott corrections always added             << 144   
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 }                                                 145 }
162                                                   146 
163 //....oooOO0OOooo........oooOO0OOooo........oo    147 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
164                                                   148 
165 void G4WentzelOKandVIxSection::SetupParticle(c    149 void G4WentzelOKandVIxSection::SetupParticle(const G4ParticleDefinition* p)
166 {                                                 150 {
167   particle = p;                                   151   particle = p;
168   mass = particle->GetPDGMass();                  152   mass = particle->GetPDGMass();
169   spin = particle->GetPDGSpin();                  153   spin = particle->GetPDGSpin();
170   if(0.0 != spin) { spin = 0.5; }                 154   if(0.0 != spin) { spin = 0.5; }
171   G4double q = std::abs(particle->GetPDGCharge << 155   G4double q = std::fabs(particle->GetPDGCharge()/eplus);
172   chargeSquare = q*q;                             156   chargeSquare = q*q;
173   charge3 = chargeSquare*q;                       157   charge3 = chargeSquare*q;
174   tkin = 0.0;                                     158   tkin = 0.0;
175   currentMaterial = nullptr;                   << 159   currentMaterial = 0;
176   targetZ = 0;                                    160   targetZ = 0;
177 }                                                 161 }
178                                                   162 
179 //....oooOO0OOooo........oooOO0OOooo........oo    163 //....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                                                   164   
199 G4double                                          165 G4double
200 G4WentzelOKandVIxSection::SetupTarget(G4int Z,    166 G4WentzelOKandVIxSection::SetupTarget(G4int Z, G4double cut)
201 {                                                 167 {
202   G4double cosTetMaxNuc2 = cosTetMaxNuc;          168   G4double cosTetMaxNuc2 = cosTetMaxNuc;
203   if(Z != targetZ || tkin != etag) {              169   if(Z != targetZ || tkin != etag) {
204     etag    = tkin;                               170     etag    = tkin; 
205     targetZ = std::min(Z, 99);                 << 171     targetZ = Z;
206     G4double massT = (1 == Z) ? CLHEP::proton_ << 172     if(targetZ > 99) { targetZ = 99; }
207       fNistManager->GetAtomicMassAmu(Z)*CLHEP: << 173     G4double massT = proton_mass_c2;
                                                   >> 174     if(targetZ > 1) { 
                                                   >> 175       massT = fNistManager->GetAtomicMassAmu(targetZ)*CLHEP::amu_c2;
                                                   >> 176     }
208     SetTargetMass(massT);                         177     SetTargetMass(massT);
209                                                   178 
210     kinFactor = coeff*Z*chargeSquare*invbeta2/    179     kinFactor = coeff*Z*chargeSquare*invbeta2/mom2;
211     if(particle == theElectron && fMottXSectio << 
212       fMottFactor = (1.0 + 2.0e-4*Z*Z);        << 
213     }                                          << 
214                                                   180 
215     if(1 == Z) {                                  181     if(1 == Z) {
216       screenZ = ScreenRSquare[targetZ]/mom2;      182       screenZ = ScreenRSquare[targetZ]/mom2;
217     } else if(mass > MeV) {                       183     } else if(mass > MeV) {
218       screenZ = std::min(Z*1.13,1.13 +3.76*Z*Z    184       screenZ = std::min(Z*1.13,1.13 +3.76*Z*Z*invbeta2*alpha2*chargeSquare)*
219         ScreenRSquare[targetZ]/mom2;              185         ScreenRSquare[targetZ]/mom2;
220     } else {                                      186     } else {
221       G4double tau = tkin/mass;                   187       G4double tau = tkin/mass;
222       screenZ = std::min(Z*1.13,(1.13 +3.76*Z*    188       screenZ = std::min(Z*1.13,(1.13 +3.76*Z*Z
223           *invbeta2*alpha2*std::sqrt(tau/(tau     189           *invbeta2*alpha2*std::sqrt(tau/(tau + fG4pow->Z23(targetZ)))))*
224         ScreenRSquareElec[targetZ]/mom2;          190         ScreenRSquareElec[targetZ]/mom2;
225     }                                             191     }
226     if(targetZ == 1 && particle == theProton & << 192     if(targetZ == 1 && cosTetMaxNuc2 < 0.0 && particle == theProton) {
227       cosTetMaxNuc2 = 0.0;                        193       cosTetMaxNuc2 = 0.0;
228     }                                             194     }
229     formfactA = FormFactor[targetZ]*mom2;         195     formfactA = FormFactor[targetZ]*mom2;
230                                                   196 
231     cosTetMaxElec = 1.0;                          197     cosTetMaxElec = 1.0;
232     ComputeMaxElectronScattering(cut);            198     ComputeMaxElectronScattering(cut); 
233   }                                               199   }
234   //G4cout << "SetupTarget:  Z= " << targetZ < << 
235   //   << " fMottFactor= " << fMottFactor << " << 
236   return cosTetMaxNuc2;                           200   return cosTetMaxNuc2;
237 }                                                 201 } 
238                                                   202 
239 //....oooOO0OOooo........oooOO0OOooo........oo    203 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
240                                                   204 
241 G4double                                          205 G4double 
242 G4WentzelOKandVIxSection::ComputeTransportCros    206 G4WentzelOKandVIxSection::ComputeTransportCrossSectionPerAtom(G4double cosTMax)
243 {                                                 207 {
244   G4double xSection = 0.0;                        208   G4double xSection = 0.0;
245   if(cosTMax >= 1.0) { return xSection; }         209   if(cosTMax >= 1.0) { return xSection; }
                                                   >> 210  
                                                   >> 211   G4double x = 0; 
                                                   >> 212   G4double y = 0;
                                                   >> 213   G4double x1= 0;
                                                   >> 214   G4double x2= 0;
                                                   >> 215   G4double xlog = 0.0;
246                                                   216 
247   G4double costm = std::max(cosTMax,cosTetMaxE    217   G4double costm = std::max(cosTMax,cosTetMaxElec); 
248   G4double fb = screenZ*factB;                    218   G4double fb = screenZ*factB;
249                                                   219 
250   // scattering off electrons                     220   // scattering off electrons
251   if(costm < 1.0) {                               221   if(costm < 1.0) {
252     G4double x = (1.0 - costm)/screenZ;        << 222     x = (1.0 - costm)/screenZ;
253     if(x < numlimit) {                            223     if(x < numlimit) { 
254       G4double x2 = 0.5*x*x;                   << 224       x2 = 0.5*x*x;
255       xSection = x2*((1.0 - 1.3333333*x + 3*x2 << 225       y  = x2*(1.0 - 1.3333333*x + 3*x2);
                                                   >> 226       if(0.0 < factB) { y -= fb*x2*x*(0.6666667 - x); }
256     } else {                                      227     } else { 
257       G4double x1= x/(1 + x);                  << 228       x1= x/(1 + x);
258       G4double xlog = G4Log(1.0 + x);          << 229       xlog = G4Log(1.0 + x);  
259       xSection = xlog - x1 - fb*(x + x1 - 2*xl << 230       y = xlog - x1; 
                                                   >> 231       if(0.0 < factB) { y -= fb*(x + x1 - 2*xlog); }
260     }                                             232     }
261                                                   233 
262     if(xSection < 0.0) {                       << 234     if(y < 0.0) {
263       ++nwarnings;                                235       ++nwarnings;
264       if(nwarnings < nwarnlimit) {                236       if(nwarnings < nwarnlimit) {
265         G4cout << "G4WentzelOKandVIxSection::C    237         G4cout << "G4WentzelOKandVIxSection::ComputeTransportCrossSectionPerAtom"
266                << " scattering on e- <0"          238                << " scattering on e- <0"
267                << G4endl;                         239                << G4endl;
268         G4cout << "cross= " << xSection        << 240         G4cout << "y= " << y 
269                << " e(MeV)= " << tkin << " p(M    241                << " e(MeV)= " << tkin << " p(MeV/c)= " << sqrt(mom2) 
270                << " Z= " << targetZ << "  "       242                << " Z= " << targetZ << "  " 
271                << particle->GetParticleName()     243                << particle->GetParticleName() << G4endl;
272         G4cout << " 1-costm= " << 1.0-costm <<    244         G4cout << " 1-costm= " << 1.0-costm << " screenZ= " << screenZ 
273                << " x= " << x << G4endl;          245                << " x= " << x << G4endl;
274       }                                           246       }
275       xSection = 0.0;                          << 247       y = 0.0;
276     }                                             248     }
                                                   >> 249     xSection = y;
277   }                                               250   }
278   /*                                           << 251   /* 
279       G4cout << "G4WentzelOKandVIxSection::Com << 252        G4cout << "G4WentzelVI:XS per A " << " Z= " << targetZ 
280       << " Z= " << targetZ                     << 253        << " e(MeV)= " << tkin/MeV << " XSel= " << xSection
281       << " e(MeV)= " << tkin/MeV << " XSel= "  << 254          << " cut(MeV)= " << ecut/MeV  
282       << " zmaxE= " << (1.0 - cosTetMaxElec)/s << 255            << " zmaxE= " << (1.0 - cosTetMaxElec)/screenZ 
283       << " zmaxN= " << (1.0 - cosThetaMax)/scr << 256          << " zmaxN= " << (1.0 - cosThetaMax)/screenZ 
284       << " 1-costm= " << 1.0 - cosThetaMax <<  << 257          << " 1-costm= " << 1.0 - cosThetaMax << G4endl;
285   */                                              258   */
286   // scattering off nucleus                       259   // scattering off nucleus
287   if(cosTMax < 1.0) {                             260   if(cosTMax < 1.0) {
288     G4double x = (1.0 - cosTMax)/screenZ;      << 261     x = (1.0 - cosTMax)/screenZ;
289     G4double y;                                << 
290     if(x < numlimit) {                            262     if(x < numlimit) { 
291       G4double x2 = 0.5*x*x;                   << 263       x2 = 0.5*x*x;
292       y = x2*((1.0 - 1.3333333*x + 3*x2) - fb* << 264       y  = x2*(1.0 - 1.3333333*x + 3*x2); 
                                                   >> 265       if(0.0 < factB) { y -= fb*x2*x*(0.6666667 - x); }
293     } else {                                      266     } else { 
294       G4double x1= x/(1 + x);                  << 267       x1= x/(1 + x);
295       G4double xlog = G4Log(1.0 + x);          << 268       xlog = G4Log(1.0 + x);  
296       y = xlog - x1 - fb*(x + x1 - 2*xlog);    << 269       y = xlog - x1; 
                                                   >> 270       if(0.0 < factB) { y -= fb*(x + x1 - 2*xlog); }
297     }                                             271     }
298                                                   272 
299     if(y < 0.0) {                                 273     if(y < 0.0) {
300       ++nwarnings;                                274       ++nwarnings;
301       if(nwarnings < nwarnlimit) {                275       if(nwarnings < nwarnlimit) {
302         G4cout << "G4WentzelOKandVIxSection::C    276         G4cout << "G4WentzelOKandVIxSection::ComputeTransportCrossSectionPerAtom"
303                << " scattering on nucleus <0"     277                << " scattering on nucleus <0"
304                << G4endl;                         278                << G4endl;
305         G4cout << "y= " << y                      279         G4cout << "y= " << y 
306                << " e(MeV)= " << tkin << " Z=     280                << " e(MeV)= " << tkin << " Z= " << targetZ << "  " 
307                << particle->GetParticleName()     281                << particle->GetParticleName() << G4endl;
308         G4cout << " formfactA= " << formfactA     282         G4cout << " formfactA= " << formfactA << " screenZ= " << screenZ 
309                << " x= " << x <<G4endl;        << 283                << " x= " << " x1= " << x1 <<G4endl;
310       }                                           284       }
311       y = 0.0;                                    285       y = 0.0;
312     }                                             286     }
313     xSection += y*targetZ;                        287     xSection += y*targetZ; 
314   }                                               288   }
315   xSection *= kinFactor;                          289   xSection *= kinFactor;
316                                                   290  
317   /*                                           << 291   /*
318   G4cout << "Z= " << targetZ << " XStot= " <<     292   G4cout << "Z= " << targetZ << " XStot= " << xSection/barn 
319          << " screenZ= " << screenZ << " formF    293          << " screenZ= " << screenZ << " formF= " << formfactA 
320          << " for " << particle->GetParticleNa    294          << " for " << particle->GetParticleName() 
321    << " m= " << mass << " 1/v= " << sqrt(invbe << 295            << " m= " << mass << " 1/v= " << sqrt(invbeta2) << " p= " << sqrt(mom2)
322    << " p= " << sqrt(mom2)                     << 296          << " x= " << x 
323          << " x= " << x << G4endl;             << 297          << G4endl;
324   */                                              298   */
325   return xSection;                                299   return xSection; 
326 }                                                 300 }
327                                                   301 
328 //....oooOO0OOooo........oooOO0OOooo........oo    302 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
329                                                   303 
330 G4ThreeVector&                                    304 G4ThreeVector&
331 G4WentzelOKandVIxSection::SampleSingleScatteri    305 G4WentzelOKandVIxSection::SampleSingleScattering(G4double cosTMin,
332                                                   306                                                  G4double cosTMax,
333                                                   307                                                  G4double elecRatio)
334 {                                                 308 {
335   temp.set(0.0,0.0,1.0);                          309   temp.set(0.0,0.0,1.0);
336   CLHEP::HepRandomEngine* rndmEngineMod = G4Ra    310   CLHEP::HepRandomEngine* rndmEngineMod = G4Random::getTheEngine();
337                                                   311  
338   G4double formf = formfactA;                     312   G4double formf = formfactA;
339   G4double cost1 = cosTMin;                       313   G4double cost1 = cosTMin;
340   G4double cost2 = cosTMax;                       314   G4double cost2 = cosTMax;
341   if(elecRatio > 0.0) {                           315   if(elecRatio > 0.0) {
342     if(rndmEngineMod->flat() <= elecRatio) {      316     if(rndmEngineMod->flat() <= elecRatio) {
343       formf = 0.0;                                317       formf = 0.0;
344       cost1 = std::max(cost1,cosTetMaxElec);      318       cost1 = std::max(cost1,cosTetMaxElec);
345       cost2 = std::max(cost2,cosTetMaxElec);      319       cost2 = std::max(cost2,cosTetMaxElec);
346     }                                             320     }
347   }                                               321   }
348   if(cost1 > cost2) {                             322   if(cost1 > cost2) {
349     G4double w1 = 1. - cost1;                  << 323     G4double w1 = 1. - cost1 + screenZ;
350     G4double w2 = 1. - cost2;                  << 324     G4double w2 = 1. - cost2 + screenZ;
351     G4double w3 = rndmEngineMod->flat()*(w2 -  << 325     G4double z1 = w1*w2/(w1 + rndmEngineMod->flat()*(w2 - w1)) - screenZ;
352     G4double z1 = ((w2 - w3)*screenZ + w1*w2)/ << 326 
353     G4double fm = 1.0;                         << 327     G4double fm = 1.0 + formf*z1;
354                                                << 328     G4double grej = (1. - z1*factB + factB1*targetZ*sqrt(z1*factB)*(2 - z1))
355     if(fNucFormfactor == fExponentialNF) {     << 329       /((1.0 + z1*factD)*fm*fm);
356       fm += formf*z1;                          << 330 
357       fm = 1.0/(fm*fm);                        << 331     if(rndmEngineMod->flat() <= grej) {
358     } else if(fNucFormfactor == fGaussianNF) { << 
359       fm = G4Exp(-2*formf*z1);                 << 
360     } else if(fNucFormfactor == fFlatNF) {     << 
361       static const G4double ccoef = 0.00508/CL << 
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    332       // exclude "false" scattering due to formfactor and spin effect
377       G4double cost = 1.0 - z1;                   333       G4double cost = 1.0 - z1;
378       if(cost > 1.0)       { cost = 1.0; }        334       if(cost > 1.0)       { cost = 1.0; }
379       else if(cost < -1.0) { cost =-1.0; }        335       else if(cost < -1.0) { cost =-1.0; }
380       G4double sint = sqrt((1.0 - cost)*(1.0 +    336       G4double sint = sqrt((1.0 - cost)*(1.0 + cost));
381       //G4cout << "sint= " << sint << G4endl;     337       //G4cout << "sint= " << sint << G4endl;
382       G4double phi  = twopi*rndmEngineMod->fla    338       G4double phi  = twopi*rndmEngineMod->flat();
383       temp.set(sint*cos(phi),sint*sin(phi),cos    339       temp.set(sint*cos(phi),sint*sin(phi),cost);
384     }                                             340     }
385   }                                               341   }
386   return temp;                                    342   return temp;
387 }                                                 343 }
388                                                   344 
389 //....oooOO0OOooo........oooOO0OOooo........oo    345 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
390                                                   346 
391 void                                              347 void 
392 G4WentzelOKandVIxSection::ComputeMaxElectronSc    348 G4WentzelOKandVIxSection::ComputeMaxElectronScattering(G4double cutEnergy)
393 {                                                 349 {
394   if(mass > MeV) {                                350   if(mass > MeV) {
395     G4double ratio = electron_mass_c2/mass;       351     G4double ratio = electron_mass_c2/mass;
396     G4double tau = tkin/mass;                     352     G4double tau = tkin/mass;
397     G4double tmax = 2.0*electron_mass_c2*tau*(    353     G4double tmax = 2.0*electron_mass_c2*tau*(tau + 2.)/
398       (1.0 + 2.0*ratio*(tau + 1.0) + ratio*rat    354       (1.0 + 2.0*ratio*(tau + 1.0) + ratio*ratio);
                                                   >> 355     //tmax = std::min(tmax, targetZ*targetZ*10*eV); 
399     cosTetMaxElec = 1.0 - std::min(cutEnergy,     356     cosTetMaxElec = 1.0 - std::min(cutEnergy, tmax)*electron_mass_c2/mom2;
400   } else {                                        357   } else {
401                                                   358 
402     G4double tmax = (particle == theElectron)  << 359     G4double tmax = tkin;
                                                   >> 360     if(particle == theElectron) { tmax *= 0.5; }
                                                   >> 361     //tmax = std::min(tmax, targetZ*targetZ*10*eV); 
403     G4double t = std::min(cutEnergy, tmax);       362     G4double t = std::min(cutEnergy, tmax);
404     G4double mom21 = t*(t + 2.0*electron_mass_    363     G4double mom21 = t*(t + 2.0*electron_mass_c2);
405     G4double t1 = tkin - t;                       364     G4double t1 = tkin - t;
406     //G4cout <<"tkin=" <<tkin<<" tmax= "<<tmax    365     //G4cout <<"tkin=" <<tkin<<" tmax= "<<tmax<<" t= " 
407     //<<t<< " t1= "<<t1<<" cut= "<<ecut<<G4end    366     //<<t<< " t1= "<<t1<<" cut= "<<ecut<<G4endl;
408     if(t1 > 0.0) {                                367     if(t1 > 0.0) {
409       G4double mom22 = t1*(t1 + 2.0*mass);        368       G4double mom22 = t1*(t1 + 2.0*mass);
410       G4double ctm = (mom2 + mom22 - mom21)*0.    369       G4double ctm = (mom2 + mom22 - mom21)*0.5/sqrt(mom2*mom22);
411       if(ctm <  1.0) { cosTetMaxElec = ctm; }     370       if(ctm <  1.0) { cosTetMaxElec = ctm; }
412       if(particle == theElectron && cosTetMaxE    371       if(particle == theElectron && cosTetMaxElec < 0.0) { 
413         cosTetMaxElec = 0.0;                      372         cosTetMaxElec = 0.0; 
414       }                                           373       }
415     }                                             374     }
416   }                                               375   }
417 }                                                 376 }
418                                                   377 
419 //....oooOO0OOooo........oooOO0OOooo........oo    378 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
420                                                   379 
421 G4double                                          380 G4double 
422 G4WentzelOKandVIxSection::ComputeSecondTranspo    381 G4WentzelOKandVIxSection::ComputeSecondTransportMoment(G4double /*CosThetaMax*/)
423 {                                                 382 {
424   return 0.0;                                     383   return 0.0;
425 }                                                 384 }
426                                                   385 
427 //....oooOO0OOooo........oooOO0OOooo........oo    386 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
428                                                   387