Gabriele Cosmo
154 lines
7.2 KiB
C++
154 lines
7.2 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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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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#include "G4LEPTSElasticModel.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4LEPTSElasticModel::G4LEPTSElasticModel(const G4String& modelName)
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: G4VLEPTSModel( modelName )
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{
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theXSType = XSElastic;
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fParticleChangeForGamma = nullptr;
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} // constructor
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4LEPTSElasticModel::~G4LEPTSElasticModel() = default;
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4LEPTSElasticModel::Initialise(const G4ParticleDefinition* aParticle,
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const G4DataVector&)
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{
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Init();
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BuildPhysicsTable( *aParticle );
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fParticleChangeForGamma = GetParticleChangeForGamma();
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// static const G4double proton_mass_c2 = 938.272013 * MeV;
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// static const G4double neutron_mass_c2 = 939.56536 * MeV;
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// static const G4double h2o_mass_c2 = 8*neutron_mass_c2 + 10*(proton_mass_c2 + electron_mass_c2);
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// G4cout << "mme " << h2o_mass_c2/MeV << " " << H2o_mass_c2/MeV << G4endl;
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const G4MaterialTable * materialTable = G4Material::GetMaterialTable() ;
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std::vector<G4Material*>::const_iterator matite;
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for( matite = materialTable->begin(); matite != materialTable->end(); matite++ ) {
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const G4Material * aMaterial = (*matite);
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theMassTarget[aMaterial] = theMolecularMass[aMaterial] / (6.02214179e+23/CLHEP::mole) *CLHEP::c_light * CLHEP::c_light;
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theMassProjectile[aMaterial] = CLHEP::electron_mass_c2;
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if( verboseLevel >= 1) G4cout << "Material: " << aMaterial->GetName() << " MolecularMass: " << theMolecularMass[aMaterial]/(CLHEP::g/CLHEP::mole) << " g/mole "
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<< " MTarget: " << theMassTarget[aMaterial]/CLHEP::MeV << " MeV" << G4endl;
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double G4LEPTSElasticModel::CrossSectionPerVolume(const G4Material* mate,
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const G4ParticleDefinition* aParticle,
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G4double kineticEnergy,
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G4double,
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G4double)
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{
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if( kineticEnergy < theLowestEnergyLimit ) return DBL_MAX;
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return 1./GetMeanFreePath( mate, aParticle, kineticEnergy );
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4LEPTSElasticModel::SampleSecondaries(std::vector<G4DynamicParticle*>*,
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const G4MaterialCutsCouple* mateCuts,
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const G4DynamicParticle* aDynamicParticle,
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G4double,
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G4double)
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{
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G4double P0KinEn = aDynamicParticle->GetKineticEnergy();
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G4ThreeVector P0Dir = aDynamicParticle->GetMomentumDirection();
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if( P0KinEn < theLowestEnergyLimit ) {
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fParticleChangeForGamma->ProposeMomentumDirection( P0Dir );
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fParticleChangeForGamma->SetProposedKineticEnergy( 0.);
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fParticleChangeForGamma->ProposeLocalEnergyDeposit( P0KinEn);
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fParticleChangeForGamma->ProposeTrackStatus(fStopAndKill);
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if( verboseLevel > 2 ) G4cout << " ENERGY LOW " << P0KinEn - theLowestEnergyLimit << G4endl;
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return;
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}
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//- G4ParticleDefinition * particleDefDef = aTrack.GetDefinition();
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//- G4String partName = particleDefDef->GetParticleName();
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// G4ThreeVector pos, pos0, dpos;
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//- G4StepPoG4int * PostPoG4int = aStep.GetPostStepPoG4int();
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//- G4ThreeVector r = PostPoG4int->GetPosition();
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//TypeOfInteraction=-10;
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const G4Material* aMaterial = mateCuts->GetMaterial();
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G4double ang = SampleAngle(aMaterial, P0KinEn/CLHEP::eV, 0.0);
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G4ThreeVector P1Dir = SampleNewDirection(P0Dir, ang);
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#ifdef DEBUG_LEPTS
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if( verboseLevel >= 2 ) G4cout << " G4LEPTSElasticModel::SampleSecondaries( P1Dir " << P1Dir << " P0Dir " << P0Dir << " ang " << ang << G4endl;
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#endif
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//G4ThreeVector P1Dir = SampleNewDirection(P0Dir, P0KinEn/eV, 0.0);
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//G4double Energylost1= ElasticEnergyTransferWater2(P0KinEn, ang);
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G4double Energylost = EnergyTransfer(P0KinEn, ang, theMassTarget[aMaterial], theMassProjectile[aMaterial]);
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if( verboseLevel >= 3 ) G4cout << " ELASTIC Energylost "<< Energylost << " = " << P0KinEn << " " <<ang << " " << theMassTarget[aMaterial] << " " << theMassProjectile[aMaterial] << G4endl;
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G4double P1KinEn = P0KinEn - Energylost;
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if( verboseLevel >= 3 ) G4cout << " ELASTIC " << P1KinEn << " = " << P0KinEn << " - " << Energylost << G4endl;
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#ifdef DEBUG_LEPTS
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if( verboseLevel >= 2 ) G4cout << " G4LEPTSElasticModel::SampleSecondaries( SetProposedKineticEnergy " << P1KinEn << " " << P0KinEn << " - " << Energylost << G4endl;
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#endif
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fParticleChangeForGamma->ProposeMomentumDirection( P1Dir );
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fParticleChangeForGamma->SetProposedKineticEnergy( P1KinEn);
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fParticleChangeForGamma->ProposeLocalEnergyDeposit( Energylost);
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//G4cout << "elasticEnergyLost: " << Energylost << G4endl;
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#ifdef DEBUG_LEPTS
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if( verboseLevel >= 2 ) G4cout << " G4LEPTSElasticModel::SampleSecondaries( ProposeMomentumDirection " << fParticleChangeForGamma->GetProposedMomentumDirection() << G4endl;
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#endif
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4double G4LEPTSElasticModel::EnergyTransfer(G4double E, G4double ang, G4double MT, G4double MP)
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{
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G4double co = std::cos(ang);
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G4double si = std::sin(ang);
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G4double W = ( (E+MP)*si*si + MT - co*std::sqrt(MT*MT-MP*MP*si*si) ) * E*(E+2*MP)
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/ ( std::pow((E+MP+MT),2) - E*co*co*(E+2*MP) );
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//G4double W2 = 2*MP/MT*(1-co)*E;
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//G4cout << "WWWWWWWWW: " << W/E << " " << E/W << " " << W2/W << G4endl;
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//G4cout << "Mm " << MT/MeV << " " << MP/MeV << G4endl;
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return W;
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}
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