1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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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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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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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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29 | // |
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30 | // by V. Lara |
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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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43 | |
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44 | |
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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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49 | #include "G4ParticleDefinition.hh" |
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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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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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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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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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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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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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225 | } |
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226 | |
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227 | // Main loop. It is performed until equilibrium deexcitation. |
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228 | //G4int fragment=0; |
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229 | |
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230 | for (;;) { |
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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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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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239 | |
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240 | |
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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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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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255 | G4bool ThereIsTransition = false; |
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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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266 | do |
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267 | { |
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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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271 | G4bool go_ahead = false; |
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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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274 | G4double test = static_cast<G4double>(aFragment.GetNumberOfExcitons()); |
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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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305 | if (go_ahead && aFragment.GetA() > 4) |
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306 | { |
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307 | G4double TotalEmissionProbability = aEmission.GetTotalProbability(aFragment); |
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308 | // |
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309 | // G4cout<<"TotalEmissionProbability="<<TotalEmissionProbability<<G4endl; |
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310 | // |
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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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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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327 | // Sum of transition probabilities |
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328 | // G4double TotalTransitionProbability = aTransition->CalculateProbability(aFragment); |
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329 | |
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330 | // Sum of all probabilities |
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331 | G4double TotalProbability = TotalEmissionProbability + TotalTransitionProbability; |
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332 | |
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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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337 | ThereIsTransition = true; |
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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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369 | |
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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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435 | |
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436 | |
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437 | |
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