[819] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | #ifndef G4ParaFissionModel_h |
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| 27 | #define G4ParaFissionModel_h |
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| 28 | |
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| 29 | #include "G4CompetitiveFission.hh" |
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| 30 | #include "G4ExcitationHandler.hh" |
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| 31 | #include "G4HadronicInteraction.hh" |
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| 32 | #include "G4ParticleTable.hh" |
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| 33 | |
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| 34 | // Class Description |
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| 35 | // Final state production model for (based on evaluated data |
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| 36 | // libraries) description of neutron induced fission below 60 MeV; |
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| 37 | // In case you need the fission fragments, use this model. |
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| 38 | // To be used in your physics list in case you need this physics. |
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| 39 | // In this case you want to register an object of this class with |
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| 40 | // the corresponding process. |
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| 41 | |
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| 42 | |
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| 43 | class G4ParaFissionModel : public G4HadronicInteraction |
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| 44 | { |
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| 45 | public: |
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| 46 | G4ParaFissionModel() |
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| 47 | { |
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| 48 | SetMinEnergy( 0.0 ); |
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| 49 | SetMaxEnergy( 60.*MeV ); |
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| 50 | } |
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| 51 | |
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| 52 | virtual G4HadFinalState* ApplyYourself(const G4HadProjectile& aTrack, |
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| 53 | G4Nucleus& theNucleus) |
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| 54 | { |
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| 55 | theParticleChange.Clear(); |
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| 56 | theParticleChange.SetStatusChange( stopAndKill ); |
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| 57 | theParticleChange.SetEnergyChange( 0.0 ); |
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| 58 | |
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| 59 | // prepare the fragment |
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| 60 | |
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| 61 | G4Fragment anInitialState; |
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| 62 | G4double anA = theNucleus.GetN(); |
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| 63 | G4double aZ = theNucleus.GetZ(); |
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| 64 | G4double nucMass = G4ParticleTable::GetParticleTable()->GetIonTable()->GetIonMass(G4int(aZ) ,G4int(anA)); |
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| 65 | |
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| 66 | anA += aTrack.GetDefinition()->GetBaryonNumber(); |
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| 67 | aZ += aTrack.GetDefinition()->GetPDGCharge(); |
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| 68 | |
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| 69 | G4int numberOfEx = aTrack.GetDefinition()->GetBaryonNumber(); |
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| 70 | G4int numberOfCh = G4int(std::abs(aTrack.GetDefinition()->GetPDGCharge())); |
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| 71 | G4int numberOfHoles = 0; |
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| 72 | |
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| 73 | G4ThreeVector exciton3Momentum = aTrack.Get4Momentum().vect(); |
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| 74 | G4double compoundMass = aTrack.GetTotalEnergy(); |
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| 75 | compoundMass += nucMass; |
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| 76 | compoundMass = std::sqrt(compoundMass*compoundMass - exciton3Momentum*exciton3Momentum); |
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| 77 | G4LorentzVector fragment4Momentum(exciton3Momentum, |
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| 78 | std::sqrt(exciton3Momentum.mag2()+compoundMass*compoundMass)); |
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| 79 | |
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| 80 | anInitialState.SetA(anA); |
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| 81 | anInitialState.SetZ(aZ); |
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| 82 | anInitialState.SetNumberOfParticles(numberOfEx-numberOfHoles); |
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| 83 | anInitialState.SetNumberOfCharged(numberOfCh); |
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| 84 | anInitialState.SetNumberOfHoles(numberOfHoles); |
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| 85 | anInitialState.SetMomentum(fragment4Momentum); |
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| 86 | |
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| 87 | // do the fission |
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| 88 | G4FragmentVector * theFissionResult = theFission.BreakUp(anInitialState); |
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| 89 | |
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| 90 | // deexcite the fission fragments and fill result |
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| 91 | |
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| 92 | G4int ll = theFissionResult->size(); |
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| 93 | for(G4int i=0; i<ll; i++) |
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| 94 | { |
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| 95 | G4ReactionProductVector* theExcitationResult = 0; |
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| 96 | G4Fragment* aFragment = (*theFissionResult)[i]; |
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| 97 | if(aFragment->GetExcitationEnergy()>1.*eV) |
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| 98 | { |
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| 99 | theExcitationResult = theHandler.BreakItUp(*aFragment); |
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| 100 | |
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| 101 | // add secondaries |
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| 102 | for(G4int j = 0; j < G4int(theExcitationResult->size()); j++) |
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| 103 | { |
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| 104 | G4ReactionProduct* rp0 = (*theExcitationResult)[j]; |
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| 105 | G4DynamicParticle* p0 = new G4DynamicParticle; |
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| 106 | p0->SetDefinition(rp0->GetDefinition() ); |
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| 107 | p0->SetMomentum(rp0->GetMomentum() ); |
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| 108 | theParticleChange.AddSecondary(p0); |
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| 109 | delete rp0; |
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| 110 | } |
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| 111 | delete theExcitationResult; |
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| 112 | } |
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| 113 | else |
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| 114 | { |
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| 115 | // add secondary |
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| 116 | G4DynamicParticle* p0 = new G4DynamicParticle; |
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| 117 | p0->SetDefinition(aFragment->GetParticleDefinition()); |
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| 118 | p0->SetMomentum(aFragment->GetMomentum().vect()); |
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| 119 | theParticleChange.AddSecondary(p0); |
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| 120 | } |
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| 121 | delete aFragment; |
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| 122 | } |
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| 123 | |
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| 124 | delete theFissionResult; |
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| 125 | |
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| 126 | return &theParticleChange; |
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| 127 | } |
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| 128 | private: |
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| 129 | |
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| 130 | G4CompetitiveFission theFission; |
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| 131 | G4ExcitationHandler theHandler; |
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| 132 | |
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| 133 | G4HadFinalState theParticleChange; |
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| 134 | }; |
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| 135 | #endif |
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