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This commit is contained in:
Gabriele Cosmo
2024-12-06 11:11:40 +01:00
parent e58e650b32
commit 32390e802b
1984 changed files with 98713 additions and 83996 deletions
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source/processes/electromagnetic/standard/src/G4BetheHeitler5DModel.cc
+29 -17
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@@ -307,7 +307,7 @@ G4BetheHeitler5DModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect,
// End of Protection
//
const G4double GammaPolarizationMag = GammaPolarization.mag();
//////////////////////////////////////////////////////////////
// target element
// select randomly one element constituting the material
@@ -505,16 +505,22 @@ G4BetheHeitler5DModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect,
const G4double Jacob1 = 2.*X1*lnPairInvMassRange*PairInvMass;
const G4double Jacob2 = std::abs(sinThetaLept);
// there is no probability to have a lepton with zero momentum
// X and Y components of momentum may be zero, in that case SinPhi=1, cosPhi=0
const G4double EPlus = LeptonPlus.t();
const G4double PPlus = LeptonPlus.vect().mag();
const G4double sinThetaPlus = LeptonPlus.vect().perp()/PPlus;
const G4double cosThetaPlus = LeptonPlus.vect().cosTheta();
const G4double pPX = LeptonPlus.x();
const G4double pPY = LeptonPlus.y();
const G4double dum1 = 1./std::sqrt( pPX*pPX + pPY*pPY );
const G4double cosPhiPlus = pPX*dum1;
const G4double sinPhiPlus = pPY*dum1;
const G4double pPX = LeptonPlus.x();
const G4double pPY = LeptonPlus.y();
const G4double pPZ = LeptonPlus.z();
G4double sinPhiPlus = 1.0;
G4double cosPhiPlus = 0.0;
G4double sinThetaPlus = 0.0;
G4double cosThetaPlus = pPZ/PPlus;
if (cosThetaPlus < 1.0 && cosThetaPlus > -1.0) {
sinThetaPlus = std::sqrt((1.0 - cosThetaPlus)*(1.0 + cosThetaPlus));
sinPhiPlus = pPY/(PPlus*sinThetaPlus);
cosPhiPlus = pPX/(PPlus*sinThetaPlus);
}
// denominators:
// the two cancelling leading terms for forward emission at high energy, removed
@@ -523,16 +529,22 @@ G4BetheHeitler5DModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect,
const G4double DPlus = (elMassCTP*elMassCTP + ePlusSTP*ePlusSTP)
/(EPlus + PPlus*cosThetaPlus);
// there is no probability to have a lepton with zero momentum
// X and Y components of momentum may be zero, in that case SinPhi=0, cosPhi=1
const G4double EMinus = LeptonMinus.t();
const G4double PMinus = LeptonMinus.vect().mag();
const G4double sinThetaMinus = LeptonMinus.vect().perp()/PMinus;
const G4double cosThetaMinus = LeptonMinus.vect().cosTheta();
const G4double ePX = LeptonMinus.x();
const G4double ePY = LeptonMinus.y();
const G4double dum2 = 1./std::sqrt( ePX*ePX + ePY*ePY );
const G4double cosPhiMinus = ePX*dum2;
const G4double sinPhiMinus = ePY*dum2;
const G4double ePX = LeptonMinus.x();
const G4double ePY = LeptonMinus.y();
const G4double ePZ = LeptonMinus.z();
G4double sinPhiMinus = 0.0;
G4double cosPhiMinus = 1.0;
G4double sinThetaMinus = 0.0;
G4double cosThetaMinus = ePZ/PMinus;
if (cosThetaMinus < 1.0 && cosThetaMinus > -1.0) {
sinThetaMinus = std::sqrt((1.0 - cosThetaMinus)*(1.0 + cosThetaMinus));
sinPhiMinus = ePY/(PMinus*sinThetaMinus);
cosPhiMinus = ePX/(PMinus*sinThetaMinus);
}
const G4double elMassCTM = LeptonMass*cosThetaMinus;
const G4double eMinSTM = EMinus*sinThetaMinus;