[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 | // |
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[962] | 27 | // $Id: G4PreCompoundModel.cc,v 1.17 2008/12/09 14:09:59 ahoward Exp $ |
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| 28 | // GEANT4 tag $Name: geant4-09-02-ref-02 $ |
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[819] | 29 | // |
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| 30 | // by V. Lara |
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[962] | 31 | // |
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| 32 | //J. M. Quesada (Apr.08). Several changes. Soft cut-off switched off. |
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| 33 | //(May. 08). Protection against non-physical preeq. transitional regime has |
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| 34 | // been set |
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| 35 | // |
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| 36 | // Modif (03 September 2008) by J. M. Quesada for external choice of inverse |
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| 37 | // cross section option |
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| 38 | // JMQ (06 September 2008) Also external choices have been added for: |
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| 39 | // - superimposed Coulomb barrier (useSICB=true) |
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| 40 | // - "never go back" hipothesis (useNGB=true) |
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| 41 | // - soft cutoff from preeq. to equlibrium (useSCO=true) |
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| 42 | // - CEM transition probabilities (useCEMtr=true) |
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[819] | 43 | |
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[962] | 44 | |
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[819] | 45 | #include "G4PreCompoundModel.hh" |
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| 46 | #include "G4PreCompoundEmission.hh" |
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| 47 | #include "G4PreCompoundTransitions.hh" |
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| 48 | #include "G4GNASHTransitions.hh" |
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[962] | 49 | #include "G4ParticleDefinition.hh" |
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[819] | 50 | |
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| 51 | |
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| 52 | #ifdef PRECOMPOUND_TEST |
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| 53 | G4Fragment G4PreCompoundModel::theInitialFragmentForTest; |
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| 54 | std::vector<G4String*> G4PreCompoundModel::theCreatorModels; |
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| 55 | #endif |
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| 56 | |
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| 57 | const G4PreCompoundModel & G4PreCompoundModel::operator=(const G4PreCompoundModel &) |
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| 58 | { |
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| 59 | throw G4HadronicException(__FILE__, __LINE__, "G4PreCompoundModel::operator= meant to not be accessable"); |
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| 60 | return *this; |
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| 61 | } |
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| 62 | |
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| 63 | |
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| 64 | G4bool G4PreCompoundModel::operator==(const G4PreCompoundModel &) const |
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| 65 | { |
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| 66 | return false; |
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| 67 | } |
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| 68 | |
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| 69 | G4bool G4PreCompoundModel::operator!=(const G4PreCompoundModel &) const |
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| 70 | { |
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| 71 | return true; |
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| 72 | } |
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| 73 | |
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| 74 | |
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| 75 | |
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| 76 | // Additional Declarations |
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| 77 | |
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| 78 | G4HadFinalState * G4PreCompoundModel::ApplyYourself(const G4HadProjectile & thePrimary, |
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| 79 | G4Nucleus & theNucleus) |
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| 80 | { |
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| 81 | // prepare fragment |
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| 82 | G4Fragment anInitialState; |
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| 83 | // This si for GNASH transitions |
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| 84 | anInitialState.SetParticleDefinition(const_cast<G4ParticleDefinition *>(thePrimary.GetDefinition())); |
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| 85 | |
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| 86 | G4int anA=static_cast<G4int>(theNucleus.GetN()); |
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| 87 | anA += thePrimary.GetDefinition()->GetBaryonNumber(); |
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| 88 | |
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| 89 | anInitialState.SetA(anA); |
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| 90 | |
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| 91 | G4int aZ=static_cast<G4int>(theNucleus.GetZ()); |
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| 92 | aZ += static_cast<G4int>(thePrimary.GetDefinition()->GetPDGCharge()); |
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| 93 | |
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| 94 | anInitialState.SetZ(aZ); |
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| 95 | |
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| 96 | // Assume the projectile is a nucleon |
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| 97 | |
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| 98 | // Number of Excited Particles |
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| 99 | anInitialState.SetNumberOfParticles(1+thePrimary.GetDefinition()->GetBaryonNumber()); |
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| 100 | |
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| 101 | // Number of Charged Excited Particles |
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| 102 | // JMQ/AH modify number of charged particles with probability of the Z/A ratio of the nucleus: |
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| 103 | // if(G4UniformRand() <= aZ/anA) BUG! - integer arithmetic |
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| 104 | if(G4UniformRand() <= (static_cast<G4double>(aZ))/(static_cast<G4double>(anA))) |
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| 105 | anInitialState.SetNumberOfCharged(static_cast<G4int>(thePrimary.GetDefinition()->GetPDGCharge()+.01) + 1); |
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| 106 | else |
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| 107 | anInitialState.SetNumberOfCharged(static_cast<G4int>(thePrimary.GetDefinition()->GetPDGCharge()+.01)); |
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| 108 | |
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| 109 | //AH anInitialState.SetNumberOfCharged(static_cast<G4int>(thePrimary.GetDefinition()->GetPDGCharge()+.01) + |
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| 110 | //AH static_cast<G4int>(0.5+G4UniformRand())); |
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| 111 | |
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| 112 | // Number of Holes |
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| 113 | anInitialState.SetNumberOfHoles(1); |
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| 114 | |
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| 115 | // pre-compound nucleus energy. |
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| 116 | G4double anEnergy = 0; |
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| 117 | G4double nucleusMass = G4ParticleTable::GetParticleTable()->GetIonTable()->GetIonMass(static_cast<G4int>(theNucleus.GetZ()), |
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| 118 | static_cast<G4int>(theNucleus.GetN())); |
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| 119 | anEnergy = nucleusMass + thePrimary.GetTotalEnergy(); |
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| 120 | |
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| 121 | // Momentum |
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| 122 | G4ThreeVector p = thePrimary.Get4Momentum().vect(); |
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| 123 | |
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| 124 | // 4-momentum |
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| 125 | G4LorentzVector momentum(p, anEnergy); |
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| 126 | anInitialState.SetMomentum(momentum); |
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| 127 | |
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| 128 | #ifdef PRECOMPOUND_TEST |
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| 129 | G4PreCompoundModel::theInitialFragmentForTest = anInitialState; |
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| 130 | #endif |
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| 131 | |
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| 132 | // call excitation handler |
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| 133 | const G4Fragment aFragment(anInitialState); |
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| 134 | G4ReactionProductVector * result = DeExcite(aFragment); |
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| 135 | |
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| 136 | #ifdef PRECOMPOUND_TEST |
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| 137 | for (std::vector<G4String*>::iterator icm = theCreatorModels.begin(); |
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| 138 | icm != theCreatorModels.end(); ++icm ) |
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| 139 | { |
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| 140 | delete (*icm); |
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| 141 | } |
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| 142 | theCreatorModels.clear(); |
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| 143 | #endif |
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| 144 | // fill particle change |
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| 145 | theResult.Clear(); |
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| 146 | theResult.SetStatusChange(stopAndKill); |
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| 147 | for(G4ReactionProductVector::iterator i= result->begin(); i != result->end(); ++i) |
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| 148 | { |
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| 149 | G4DynamicParticle * aNew = |
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| 150 | new G4DynamicParticle((*i)->GetDefinition(), |
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| 151 | (*i)->GetTotalEnergy(), |
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| 152 | (*i)->GetMomentum()); |
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| 153 | #ifdef PRECOMPOUND_TEST |
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| 154 | theCreatorModels.push_back(new G4String((*i)->GetCreatorModel())); |
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| 155 | #endif |
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| 156 | delete (*i); |
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| 157 | theResult.AddSecondary(aNew); |
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| 158 | } |
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| 159 | delete result; |
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| 160 | |
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| 161 | //return the filled particle change |
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| 162 | return &theResult; |
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| 163 | } |
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| 164 | |
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| 165 | |
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| 166 | ///////////////////////////////////////////////////////////////////////////////////////// |
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| 167 | ///////////////////////////////////////////////////////////////////////////////////////// |
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| 168 | |
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| 169 | G4ReactionProductVector* G4PreCompoundModel::DeExcite(const G4Fragment & theInitialState) const |
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| 170 | { |
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| 171 | |
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| 172 | G4ReactionProductVector * Result = new G4ReactionProductVector; |
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| 173 | |
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| 174 | // Copy of the initial state |
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| 175 | G4Fragment aFragment(theInitialState); |
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[962] | 176 | |
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| 177 | if (aFragment.GetExcitationEnergy() < 10*eV) |
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| 178 | { |
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| 179 | // Perform Equilibrium Emission |
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| 180 | PerformEquilibriumEmission(aFragment,Result); |
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| 181 | return Result; |
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| 182 | } |
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[819] | 183 | |
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| 184 | if (aFragment.GetA() < 5) { |
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| 185 | G4ReactionProduct * theRP = new G4ReactionProduct(G4ParticleTable::GetParticleTable()-> |
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| 186 | GetIon(static_cast<G4int>(aFragment.GetZ()), |
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| 187 | static_cast<G4int>(aFragment.GetA()), |
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| 188 | aFragment.GetExcitationEnergy())); |
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| 189 | theRP->SetMomentum(aFragment.GetMomentum().vect()); |
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| 190 | theRP->SetTotalEnergy(aFragment.GetMomentum().e()); |
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| 191 | Result->push_back(theRP); |
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| 192 | return Result; |
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| 193 | } |
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| 194 | |
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| 195 | G4PreCompoundEmission aEmission; |
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| 196 | if (useHETCEmission) aEmission.SetHETCModel(); |
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| 197 | aEmission.SetUp(theInitialState); |
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[962] | 198 | |
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| 199 | //for cross section options |
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| 200 | |
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| 201 | if (OPTxs!= 0 && OPTxs!=1 && OPTxs !=2 && OPTxs !=3 && OPTxs !=4 ) { |
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| 202 | std::ostringstream errOs; |
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| 203 | errOs << "BAD CROSS SECTION OPTION in G4PreCompoundModel.cc !!" <<G4endl; |
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| 204 | throw G4HadronicException(__FILE__, __LINE__, errOs.str());} |
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| 205 | else aEmission.SetOPTxs(OPTxs); |
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| 206 | |
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| 207 | //for the choice of superimposed Coulomb Barrier for inverse cross sections |
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| 208 | |
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| 209 | aEmission.UseSICB(useSICB); |
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| 210 | |
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| 211 | |
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| 212 | //---------- |
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| 213 | |
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[819] | 214 | G4VPreCompoundTransitions * aTransition = 0; |
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| 215 | if (useGNASHTransition) |
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| 216 | { |
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| 217 | aTransition = new G4GNASHTransitions; |
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| 218 | } |
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| 219 | else |
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| 220 | { |
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| 221 | aTransition = new G4PreCompoundTransitions; |
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[962] | 222 | // for the choice of "never go back" hypothesis and CEM transition probabilities |
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| 223 | if (useNGB) aTransition->UseNGB(useNGB); |
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| 224 | if (useCEMtr) aTransition->UseCEMtr(useCEMtr); |
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[819] | 225 | } |
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[962] | 226 | |
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[819] | 227 | // Main loop. It is performed until equilibrium deexcitation. |
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[962] | 228 | //G4int fragment=0; |
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| 229 | |
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[819] | 230 | for (;;) { |
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[962] | 231 | |
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| 232 | //fragment++; |
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| 233 | //G4cout<<"-------------------------------------------------------------------"<<G4endl; |
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| 234 | //G4cout<<"Fragment number .. "<<fragment<<G4endl; |
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| 235 | |
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[819] | 236 | // Initialize fragment according with the nucleus parameters |
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| 237 | aEmission.Initialize(aFragment); |
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| 238 | |
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[962] | 239 | |
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| 240 | |
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[819] | 241 | G4double g = (6.0/pi2)*aFragment.GetA()* |
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| 242 | G4PreCompoundParameters::GetAddress()->GetLevelDensity(); |
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| 243 | |
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[962] | 244 | |
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| 245 | |
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| 246 | |
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| 247 | G4int EquilibriumExcitonNumber = static_cast<G4int>(std::sqrt(2.0*g*aFragment.GetExcitationEnergy())+ 0.5); |
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| 248 | // |
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| 249 | // G4cout<<"Neq="<<EquilibriumExcitonNumber<<G4endl; |
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| 250 | // |
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| 251 | // J. M. Quesada (Jan. 08) equilibrium hole number could be used as preeq.- evap. delimiter (IAEA report) |
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| 252 | // G4int EquilibriumHoleNumber = static_cast<G4int>(0.2*std::sqrt(g*aFragment.GetExcitationEnergy())+ 0.5); |
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| 253 | |
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| 254 | // Loop for transitions, it is performed while there are preequilibrium transitions. |
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[819] | 255 | G4bool ThereIsTransition = false; |
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[962] | 256 | |
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| 257 | // G4cout<<"----------------------------------------"<<G4endl; |
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| 258 | // G4double NP=aFragment.GetNumberOfParticles(); |
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| 259 | // G4double NH=aFragment.GetNumberOfHoles(); |
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| 260 | // G4double NE=aFragment.GetNumberOfExcitons(); |
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| 261 | // G4cout<<" Ex. Energy="<<aFragment.GetExcitationEnergy()<<G4endl; |
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| 262 | // G4cout<<"N. excitons="<<NE<<" N. Part="<<NP<<"N. Holes ="<<NH<<G4endl; |
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| 263 | |
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| 264 | |
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| 265 | //G4int transition=0; |
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[819] | 266 | do |
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| 267 | { |
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[962] | 268 | //transition++; |
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| 269 | //G4cout<<"transition number .."<<transition<<G4endl; |
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| 270 | //G4cout<<" n ="<<aFragment.GetNumberOfExcitons()<<G4endl; |
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[819] | 271 | G4bool go_ahead = false; |
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[962] | 272 | // soft cutoff criterium as an "ad-hoc" solution to force increase in evaporation |
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| 273 | // G4double test = static_cast<G4double>(aFragment.GetNumberOfHoles()); |
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[819] | 274 | G4double test = static_cast<G4double>(aFragment.GetNumberOfExcitons()); |
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[962] | 275 | |
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| 276 | |
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| 277 | if (test < EquilibriumExcitonNumber) go_ahead=true; |
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| 278 | //J. M. Quesada (Apr. 08): soft-cutoff switched off by default |
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| 279 | if (useSCO) { |
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| 280 | if (test < EquilibriumExcitonNumber) |
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| 281 | // if (test < EquilibriumHoleNumber) |
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| 282 | { |
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| 283 | test /= static_cast<G4double>(EquilibriumExcitonNumber); |
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| 284 | // test /= static_cast<G4double>(EquilibriumHoleNumber); |
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| 285 | test -= 1.0; |
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| 286 | test = test*test; |
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| 287 | test /= 0.32; |
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| 288 | test = 1.0 - std::exp(-test); |
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| 289 | go_ahead = (G4UniformRand() < test); |
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| 290 | |
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| 291 | } |
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| 292 | } |
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| 293 | |
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| 294 | //JMQ: WARNING: CalculateProbability MUST be called prior to Get methods !! (O values would be returned otherwise) |
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| 295 | G4double TotalTransitionProbability = aTransition->CalculateProbability(aFragment); |
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| 296 | G4double P1=aTransition->GetTransitionProb1(); |
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| 297 | G4double P2=aTransition->GetTransitionProb2(); |
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| 298 | G4double P3=aTransition->GetTransitionProb3(); |
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| 299 | // G4cout<<"P1="<<P1<<" P2="<<P2<<" P3="<<P3<<G4endl; |
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| 300 | |
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| 301 | |
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| 302 | //J.M. Quesada (May. 08). Physical criterium (lamdas) PREVAILS over approximation (critical exciton number) |
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| 303 | if(P1<=(P2+P3)) go_ahead=false; |
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| 304 | |
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[819] | 305 | if (go_ahead && aFragment.GetA() > 4) |
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[962] | 306 | { |
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[819] | 307 | G4double TotalEmissionProbability = aEmission.GetTotalProbability(aFragment); |
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[962] | 308 | // |
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| 309 | // G4cout<<"TotalEmissionProbability="<<TotalEmissionProbability<<G4endl; |
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| 310 | // |
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[819] | 311 | // Check if number of excitons is greater than 0 |
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| 312 | // else perform equilibrium emission |
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| 313 | if (aFragment.GetNumberOfExcitons() <= 0) |
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| 314 | { |
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| 315 | // Perform Equilibrium Emission |
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| 316 | #ifdef debug // ------------- debug ----------------------------------------- |
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| 317 | CheckConservation(theInitialState,aFragment,Result); |
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| 318 | #endif // ------------------- debug ----------------------------------------- |
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| 319 | PerformEquilibriumEmission(aFragment,Result); |
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| 320 | delete aTransition; |
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| 321 | return Result; |
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| 322 | } |
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| 323 | |
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| 324 | // G4PreCompoundTransitions aTransition(aFragment); |
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[962] | 325 | |
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| 326 | //J.M.Quesada (May 08) this has already been done in order to decide what to do (preeq-eq) |
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[819] | 327 | // Sum of transition probabilities |
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[962] | 328 | // G4double TotalTransitionProbability = aTransition->CalculateProbability(aFragment); |
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| 329 | |
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[819] | 330 | // Sum of all probabilities |
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| 331 | G4double TotalProbability = TotalEmissionProbability + TotalTransitionProbability; |
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[962] | 332 | |
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[819] | 333 | // Select subprocess |
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| 334 | if (G4UniformRand() > TotalEmissionProbability/TotalProbability) |
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| 335 | { |
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| 336 | // It will be transition to state with a new number of excitons |
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[962] | 337 | ThereIsTransition = true; |
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[819] | 338 | // Perform the transition |
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| 339 | aFragment = aTransition->PerformTransition(aFragment); |
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| 340 | } |
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| 341 | else |
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| 342 | { |
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| 343 | // It will be fragment emission |
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| 344 | ThereIsTransition = false; |
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| 345 | Result->push_back(aEmission.PerformEmission(aFragment)); |
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| 346 | } |
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| 347 | } |
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| 348 | else |
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| 349 | { |
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| 350 | // Perform Equilibrium Emission |
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| 351 | #ifdef debug |
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| 352 | CheckConservation(theInitialState,aFragment,Result); |
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| 353 | #endif |
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| 354 | PerformEquilibriumEmission(aFragment,Result); |
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| 355 | delete aTransition; |
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| 356 | return Result; |
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| 357 | } |
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| 358 | } while (ThereIsTransition); // end of do loop |
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| 359 | } // end of for (;;) loop |
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| 360 | } |
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| 361 | |
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| 362 | |
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| 363 | |
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| 364 | |
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| 365 | void G4PreCompoundModel::PerformEquilibriumEmission(const G4Fragment & aFragment, |
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| 366 | G4ReactionProductVector * Result) const |
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| 367 | { |
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| 368 | G4ReactionProductVector * theEquilibriumResult; |
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[962] | 369 | |
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[819] | 370 | theEquilibriumResult = GetExcitationHandler()->BreakItUp(aFragment); |
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| 371 | |
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| 372 | Result->insert(Result->end(),theEquilibriumResult->begin(), theEquilibriumResult->end()); |
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| 373 | |
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| 374 | delete theEquilibriumResult; |
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| 375 | return; |
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| 376 | } |
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| 377 | |
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| 378 | |
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| 379 | #ifdef debug |
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| 380 | void G4PreCompoundModel::CheckConservation(const G4Fragment & theInitialState, |
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| 381 | const G4Fragment & aFragment, |
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| 382 | G4ReactionProductVector * Result) const |
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| 383 | { |
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| 384 | G4double ProductsEnergy = aFragment.GetMomentum().e(); |
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| 385 | G4ThreeVector ProductsMomentum = aFragment.GetMomentum(); |
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| 386 | G4int ProductsA = static_cast<G4int>(aFragment.GetA()); |
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| 387 | G4int ProductsZ = static_cast<G4int>(aFragment.GetZ()); |
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| 388 | for (G4ReactionProductVector::iterator h = Result->begin(); |
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| 389 | h != Result->end(); ++h) |
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| 390 | { |
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| 391 | ProductsEnergy += (*h)->GetTotalEnergy(); |
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| 392 | ProductsMomentum += (*h)->GetMomentum(); |
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| 393 | ProductsA += static_cast<G4int>((*h)->GetDefinition()->GetBaryonNumber()); |
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| 394 | ProductsZ += static_cast<G4int>((*h)->GetDefinition()->GetPDGCharge()); |
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| 395 | } |
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| 396 | |
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| 397 | if (ProductsA != theInitialState.GetA()) |
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| 398 | { |
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| 399 | G4cout << "!!!!!!!!!! Baryonic Number Conservation Violation !!!!!!!!!!\n" |
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| 400 | << "G4PreCompoundModel.cc: Barionic Number Conservation test for just preequilibrium fragments\n" |
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| 401 | << "Initial A = " << theInitialState.GetA() |
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| 402 | << " Fragments A = " << ProductsA << " Diference --> " |
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| 403 | << theInitialState.GetA() - ProductsA << '\n'; |
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| 404 | } |
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| 405 | if (ProductsZ != theInitialState.GetZ()) |
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| 406 | { |
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| 407 | G4cout << "!!!!!!!!!! Charge Conservation Violation !!!!!!!!!!\n" |
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| 408 | << "G4PreCompoundModel.cc: Charge Conservation test for just preequilibrium fragments\n" |
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| 409 | << "Initial Z = " << theInitialState.GetZ() |
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| 410 | << " Fragments Z = " << ProductsZ << " Diference --> " |
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| 411 | << theInitialState.GetZ() - ProductsZ << '\n'; |
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| 412 | } |
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| 413 | if (std::abs(ProductsEnergy-theInitialState.GetMomentum().e()) > 1.0*keV) |
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| 414 | { |
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| 415 | G4cout << "!!!!!!!!!! Energy Conservation Violation !!!!!!!!!!\n" |
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| 416 | << "G4PreCompoundModel.cc: Energy Conservation test for just preequilibrium fragments\n" |
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| 417 | << "Initial E = " << theInitialState.GetMomentum().e()/MeV << " MeV" |
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| 418 | << " Fragments E = " << ProductsEnergy/MeV << " MeV Diference --> " |
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| 419 | << (theInitialState.GetMomentum().e() - ProductsEnergy)/MeV << " MeV\n"; |
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| 420 | } |
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| 421 | if (std::abs(ProductsMomentum.x()-theInitialState.GetMomentum().x()) > 1.0*keV || |
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| 422 | std::abs(ProductsMomentum.y()-theInitialState.GetMomentum().y()) > 1.0*keV || |
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| 423 | std::abs(ProductsMomentum.z()-theInitialState.GetMomentum().z()) > 1.0*keV) |
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| 424 | { |
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| 425 | G4cout << "!!!!!!!!!! Momentum Conservation Violation !!!!!!!!!!\n" |
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| 426 | << "G4PreCompoundModel.cc: Momentum Conservation test for just preequilibrium fragments\n" |
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| 427 | << "Initial P = " << theInitialState.GetMomentum().vect() << " MeV" |
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| 428 | << " Fragments P = " << ProductsMomentum << " MeV Diference --> " |
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| 429 | << theInitialState.GetMomentum().vect() - ProductsMomentum << " MeV\n"; |
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| 430 | } |
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| 431 | return; |
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| 432 | } |
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| 433 | |
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| 434 | #endif |
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[962] | 435 | |
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| 436 | |
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| 437 | |
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