1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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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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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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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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