Import Geant4 10.0.0 source tree
This commit is contained in:
Gabriele Cosmo
@@ -23,7 +23,7 @@
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// $Id$
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// $Id: G4KleinNishinaModel.cc 74309 2013-10-03 06:42:30Z gcosmo $
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//
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// -------------------------------------------------------------------
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//
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@@ -57,11 +57,18 @@
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#include "G4VAtomDeexcitation.hh"
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#include "G4AtomicShells.hh"
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#include "G4LossTableManager.hh"
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#include "G4Log.hh"
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#include "G4Exp.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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using namespace std;
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static const G4double
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d1= 2.7965e-1*barn, d2=-1.8300e-1*barn, d3= 6.7527 *barn, d4=-1.9798e+1*barn,
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e1= 1.9756e-5*barn, e2=-1.0205e-2*barn, e3=-7.3913e-2*barn, e4= 2.7079e-2*barn,
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f1=-3.9178e-7*barn, f2= 6.8241e-5*barn, f3= 6.0480e-5*barn, f4= 3.0274e-4*barn;
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G4KleinNishinaModel::G4KleinNishinaModel(const G4String& nam)
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: G4VEmModel(nam)
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{
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@@ -86,12 +93,20 @@ void G4KleinNishinaModel::Initialise(const G4ParticleDefinition* p,
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const G4DataVector& cuts)
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{
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fAtomDeexcitation = G4LossTableManager::Instance()->AtomDeexcitation();
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InitialiseElementSelectors(p, cuts);
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if(IsMaster()) { InitialiseElementSelectors(p, cuts); }
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if(!fParticleChange) { fParticleChange = GetParticleChangeForGamma(); }
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4KleinNishinaModel::InitialiseLocal(const G4ParticleDefinition*,
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G4VEmModel* masterModel)
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{
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SetElementSelectors(masterModel->GetElementSelectors());
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double
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G4KleinNishinaModel::ComputeCrossSectionPerAtom(const G4ParticleDefinition*,
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G4double GammaEnergy,
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@@ -103,11 +118,6 @@ G4KleinNishinaModel::ComputeCrossSectionPerAtom(const G4ParticleDefinition*,
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static const G4double a = 20.0 , b = 230.0 , c = 440.0;
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static const G4double
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d1= 2.7965e-1*barn, d2=-1.8300e-1*barn, d3= 6.7527 *barn, d4=-1.9798e+1*barn,
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e1= 1.9756e-5*barn, e2=-1.0205e-2*barn, e3=-7.3913e-2*barn, e4= 2.7079e-2*barn,
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f1=-3.9178e-7*barn, f2= 6.8241e-5*barn, f3= 6.0480e-5*barn, f4= 3.0274e-4*barn;
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G4double p1Z = Z*(d1 + e1*Z + f1*Z*Z), p2Z = Z*(d2 + e2*Z + f2*Z*Z),
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p3Z = Z*(d3 + e3*Z + f3*Z*Z), p4Z = Z*(d4 + e4*Z + f4*Z*Z);
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@@ -115,20 +125,20 @@ G4KleinNishinaModel::ComputeCrossSectionPerAtom(const G4ParticleDefinition*,
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if (Z < 1.5) { T0 = 40.0*keV; }
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G4double X = max(GammaEnergy, T0) / electron_mass_c2;
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xSection = p1Z*std::log(1.+2.*X)/X
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xSection = p1Z*G4Log(1.+2.*X)/X
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+ (p2Z + p3Z*X + p4Z*X*X)/(1. + a*X + b*X*X + c*X*X*X);
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// modification for low energy. (special case for Hydrogen)
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if (GammaEnergy < T0) {
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G4double dT0 = keV;
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X = (T0+dT0) / electron_mass_c2 ;
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G4double sigma = p1Z*log(1.+2*X)/X
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G4double sigma = p1Z*G4Log(1.+2*X)/X
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+ (p2Z + p3Z*X + p4Z*X*X)/(1. + a*X + b*X*X + c*X*X*X);
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G4double c1 = -T0*(sigma-xSection)/(xSection*dT0);
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G4double c2 = 0.150;
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if (Z > 1.5) { c2 = 0.375-0.0556*log(Z); }
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G4double y = log(GammaEnergy/T0);
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xSection *= exp(-y*(c1+c2*y));
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if (Z > 1.5) { c2 = 0.375-0.0556*G4Log(Z); }
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G4double y = G4Log(GammaEnergy/T0);
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xSection *= G4Exp(-y*(c1+c2*y));
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}
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if(xSection < 0.0) { xSection = 0.0; }
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@@ -173,7 +183,7 @@ void G4KleinNishinaModel::SampleSecondaries(
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G4double bindingEnergy, ePotEnergy, eKinEnergy;
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G4double gamEnergy0, gamEnergy1;
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//static const G4double eminus2 = 1.0 - exp(-2.0);
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//static const G4double eminus2 = 1.0 - G4Exp(-2.0);
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do {
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//++nloop;
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@@ -193,7 +203,7 @@ void G4KleinNishinaModel::SampleSecondaries(
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// << G4endl;
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// for rest frame of the electron
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G4double x = -log(G4UniformRand());
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G4double x = -G4Log(G4UniformRand());
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eKinEnergy = bindingEnergy*x;
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ePotEnergy = bindingEnergy*(1.0 + x);
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@@ -223,12 +233,12 @@ void G4KleinNishinaModel::SampleSecondaries(
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G4double eps0 = 1./(1 + 2*E0_m);
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G4double epsilon0sq = eps0*eps0;
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G4double alpha1 = - log(eps0);
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G4double alpha1 = - G4Log(eps0);
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G4double alpha2 = 0.5*(1 - epsilon0sq);
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do {
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if ( alpha1/(alpha1+alpha2) > G4UniformRand() ) {
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epsilon = exp(-alpha1*G4UniformRand()); // epsilon0**r
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epsilon = G4Exp(-alpha1*G4UniformRand()); // epsilon0**r
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epsilonsq = epsilon*epsilon;
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} else {
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@@ -299,6 +309,7 @@ void G4KleinNishinaModel::SampleSecondaries(
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} else { eKinEnergy = 0.0; }
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G4double edep = energy - gamEnergy1 - eKinEnergy;
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G4double esec = 0.0;
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// sample deexcitation
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//
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@@ -313,14 +324,44 @@ void G4KleinNishinaModel::SampleSecondaries(
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size_t nafter = fvect->size();
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if(nafter > nbefore) {
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for (size_t j=nbefore; j<nafter; ++j) {
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edep -= ((*fvect)[j])->GetKineticEnergy();
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G4double e = ((*fvect)[j])->GetKineticEnergy();
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if(esec + e > edep) {
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/*
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G4cout << "### G4KleinNishinaModel Edep(eV)= " << edep/eV
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<< " Esec(eV)= " << esec/eV
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<< " E["<< j << "](eV)= " << e/eV
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<< " N= " << nafter
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<< " Z= " << Z << " shell= " << i
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<< " Ebind(keV)= " << bindingEnergy/keV
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<< " Eshell(keV)= " << shell->BindingEnergy()/keV
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<< G4endl;
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*/
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for (size_t jj=j; jj<nafter; ++jj) { delete (*fvect)[jj]; }
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for (size_t jj=j; jj<nafter; ++jj) { fvect->pop_back(); }
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break;
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}
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esec += e;
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}
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}
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edep -= esec;
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}
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}
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if(fabs(energy - gamEnergy1 - eKinEnergy - esec - edep) > eV) {
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G4cout << "### G4KleinNishinaModel dE(eV)= "
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<< (energy - gamEnergy1 - eKinEnergy - esec - edep)/eV
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<< " shell= " << i
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<< " E(keV)= " << energy/keV
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<< " Ebind(keV)= " << bindingEnergy/keV
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<< " Eg(keV)= " << gamEnergy1/keV
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<< " Ee(keV)= " << eKinEnergy/keV
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<< " Esec(keV)= " << esec/keV
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<< " Edep(keV)= " << edep/keV
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<< G4endl;
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}
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// energy balance
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if(edep < 0.0) { edep = 0.0; }
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fParticleChange->ProposeLocalEnergyDeposit(edep);
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if(edep > 0.0) {
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fParticleChange->ProposeLocalEnergyDeposit(edep);
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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