Gabriele Cosmo
136 lines
5.1 KiB
C++
136 lines
5.1 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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#ifndef G4ParaFissionModel_h
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#define G4ParaFissionModel_h
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#include "G4CompetitiveFission.hh"
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#include "G4ExcitationHandler.hh"
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#include "G4HadronicInteraction.hh"
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#include "G4ParticleTable.hh"
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// Class Description
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// Final state production model for (based on evaluated data
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// libraries) description of neutron induced fission below 60 MeV;
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// In case you need the fission fragments, use this model.
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// To be used in your physics list in case you need this physics.
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// In this case you want to register an object of this class with
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// the corresponding process.
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class G4ParaFissionModel : public G4HadronicInteraction
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{
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public:
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G4ParaFissionModel()
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{
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SetMinEnergy( 0.0 );
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SetMaxEnergy( 60.*MeV );
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}
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virtual G4HadFinalState* ApplyYourself(const G4HadProjectile& aTrack,
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G4Nucleus& theNucleus)
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{
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theParticleChange.Clear();
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theParticleChange.SetStatusChange( stopAndKill );
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theParticleChange.SetEnergyChange( 0.0 );
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// prepare the fragment
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G4Fragment anInitialState;
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G4double anA = theNucleus.GetN();
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G4double aZ = theNucleus.GetZ();
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G4double nucMass = G4ParticleTable::GetParticleTable()->GetIonTable()->GetIonMass(G4int(aZ) ,G4int(anA));
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anA += aTrack.GetDefinition()->GetBaryonNumber();
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aZ += aTrack.GetDefinition()->GetPDGCharge();
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G4int numberOfEx = aTrack.GetDefinition()->GetBaryonNumber();
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G4int numberOfCh = G4int(std::abs(aTrack.GetDefinition()->GetPDGCharge()));
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G4int numberOfHoles = 0;
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G4ThreeVector exciton3Momentum = aTrack.Get4Momentum().vect();
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G4double compoundMass = aTrack.GetTotalEnergy();
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compoundMass += nucMass;
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compoundMass = std::sqrt(compoundMass*compoundMass - exciton3Momentum*exciton3Momentum);
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G4LorentzVector fragment4Momentum(exciton3Momentum,
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std::sqrt(exciton3Momentum.mag2()+compoundMass*compoundMass));
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anInitialState.SetA(anA);
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anInitialState.SetZ(aZ);
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anInitialState.SetNumberOfParticles(numberOfEx-numberOfHoles);
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anInitialState.SetNumberOfCharged(numberOfCh);
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anInitialState.SetNumberOfHoles(numberOfHoles);
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anInitialState.SetMomentum(fragment4Momentum);
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// do the fission
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G4FragmentVector * theFissionResult = theFission.BreakUp(anInitialState);
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// deexcite the fission fragments and fill result
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G4int ll = theFissionResult->size();
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for(G4int i=0; i<ll; i++)
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{
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G4ReactionProductVector* theExcitationResult = 0;
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G4Fragment* aFragment = (*theFissionResult)[i];
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if(aFragment->GetExcitationEnergy()>1.*eV)
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{
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theExcitationResult = theHandler.BreakItUp(*aFragment);
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// add secondaries
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for(G4int j = 0; j < G4int(theExcitationResult->size()); j++)
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{
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G4ReactionProduct* rp0 = (*theExcitationResult)[j];
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G4DynamicParticle* p0 = new G4DynamicParticle;
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p0->SetDefinition(rp0->GetDefinition() );
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p0->SetMomentum(rp0->GetMomentum() );
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theParticleChange.AddSecondary(p0);
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delete rp0;
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}
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delete theExcitationResult;
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}
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else
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{
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// add secondary
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G4DynamicParticle* p0 = new G4DynamicParticle;
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p0->SetDefinition(aFragment->GetParticleDefinition());
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p0->SetMomentum(aFragment->GetMomentum().vect());
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theParticleChange.AddSecondary(p0);
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}
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delete aFragment;
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}
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delete theFissionResult;
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return &theParticleChange;
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}
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private:
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G4CompetitiveFission theFission;
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G4ExcitationHandler theHandler;
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G4HadFinalState theParticleChange;
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};
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#endif
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