Gabriele Cosmo
91 lines
4.5 KiB
Plaintext
91 lines
4.5 KiB
Plaintext
//
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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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//
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// $Id: G4DNAIonizationInWater.icc,v 1.4 2006/06/29 19:34:45 gunter Exp $
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// GEANT4 tag $Name: geant4-08-01 $
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//
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#ifdef G4DNAIONIZATIONINWATER_HH
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#include "G4Electron.hh"
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template<typename TotalCrossSectionPolicy, typename FinalStatesPolicy>
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G4VParticleChange* G4DNAIonizationInWater<TotalCrossSectionPolicy, FinalStatesPolicy> :: PostStepDoIt(const G4Track & aTrack, const G4Step & aStep)
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{
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const G4int z(10); // H2O number of electrons
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this->aParticleChange.Initialize(aTrack);
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const G4DynamicParticle* aDynamicParticle = aTrack.GetDynamicParticle();
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G4double k = aDynamicParticle->GetKineticEnergy();
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G4ParticleMomentum primaryDirection = aDynamicParticle->GetMomentumDirection();
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G4double particleMass = aDynamicParticle->GetDefinition()->GetPDGMass();
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G4double TotalEnergy = k + particleMass;
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G4double Psquare = k*(TotalEnergy+particleMass);
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G4double TotalMomentum = std::sqrt(Psquare);
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G4int ionizationShell(TotalCrossSectionPolicy::RandomizePartialCrossSection(k,z));
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G4double secondaryKinetic(FinalStatesPolicy::RandomizeEjectedElectronEnergy(k,ionizationShell));
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G4double bindingEnergy(FinalStatesPolicy::EnergyConstant(ionizationShell));
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//Direction of the secondary electron
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G4double cosTheta = 0.;
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G4double phi = 0.;
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FinalStatesPolicy::RandomizeEjectedElectronDirection(k,secondaryKinetic, cosTheta, phi);
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G4double sinTheta = std::sqrt(1.-cosTheta*cosTheta);
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G4double dirx = sinTheta*std::cos(phi),diry = sinTheta*std::sin(phi),dirz = cosTheta;
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G4ThreeVector DeltaDirection(dirx,diry,dirz);
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DeltaDirection.rotateUz(primaryDirection);
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G4double DeltaTotalMomentum = std::sqrt(secondaryKinetic*(secondaryKinetic +
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2.*electron_mass_c2 ));
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//Primary Particle Direction
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G4double finalPx = TotalMomentum*primaryDirection.x()
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- DeltaTotalMomentum*DeltaDirection.x();
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G4double finalPy = TotalMomentum*primaryDirection.y()
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- DeltaTotalMomentum*DeltaDirection.y();
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G4double finalPz = TotalMomentum*primaryDirection.z()
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- DeltaTotalMomentum*DeltaDirection.z();
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G4double finalMomentum =
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std::sqrt(finalPx*finalPx+finalPy*finalPy+finalPz*finalPz);
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finalPx /= finalMomentum;
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finalPy /= finalMomentum;
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finalPz /= finalMomentum;
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this->aParticleChange.ProposeMomentumDirection( finalPx,finalPy,finalPz );
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this->aParticleChange.ProposeEnergy(k-bindingEnergy-secondaryKinetic);
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this->aParticleChange.ProposeLocalEnergyDeposit(bindingEnergy);
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this->aParticleChange.SetNumberOfSecondaries(1);
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G4DynamicParticle* aElectron = new G4DynamicParticle(G4Electron::Electron(),DeltaDirection,secondaryKinetic);
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this->aParticleChange.AddSecondary(aElectron);
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return G4VDNAProcessInWater<TotalCrossSectionPolicy, FinalStatesPolicy>::PostStepDoIt(aTrack, aStep);
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}
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#endif /* G4DNAIONIZATIONINWATER_HH */
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