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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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13 | // * work make any representation or warranty, express or implied, * |
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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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21 | // * any work based on the software) you agree to acknowledge its * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // $Id: G4WHadronElasticProcess.cc,v 1.3 2010/01/13 15:42:06 mkossov Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-03-ref-09 $ |
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28 | // |
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29 | // Geant4 Hadron Elastic Scattering Process |
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30 | // |
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31 | // Created 21 April 2006 V.Ivanchenko |
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32 | // |
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33 | // Modified: |
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34 | // 24.04.06 V.Ivanchenko add neutron scattering on hydrogen from CHIPS |
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35 | // 07.06.06 V.Ivanchenko fix problem of rotation of final state |
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36 | // 25.07.06 V.Ivanchenko add 19 MeV low energy for CHIPS |
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37 | // 26.09.06 V.Ivanchenko add lowestEnergy |
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38 | // 20.10.06 V.Ivanchenko initialise lowestEnergy=0 for neitrals, eV for charged |
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39 | // 23.01.07 V.Ivanchenko add cross section interfaces with Z and A |
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40 | // 02.05.07 V.Ivanchenko add He3 |
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41 | // 13.01.10: M.Kosov: Commented not used G4QElasticCrossSection & G4QCHIPSWorld |
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42 | // |
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43 | |
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44 | #include "G4WHadronElasticProcess.hh" |
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45 | #include "globals.hh" |
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46 | #include "G4CrossSectionDataStore.hh" |
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47 | #include "G4HadronElasticDataSet.hh" |
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48 | #include "G4VQCrossSection.hh" |
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49 | //#include "G4QElasticCrossSection.hh" |
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50 | //#include "G4QCHIPSWorld.hh" |
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51 | #include "G4Element.hh" |
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52 | #include "G4ElementVector.hh" |
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53 | #include "G4IsotopeVector.hh" |
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54 | #include "G4Neutron.hh" |
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55 | #include "G4ProductionCutsTable.hh" |
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56 | |
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57 | G4WHadronElasticProcess::G4WHadronElasticProcess(const G4String& pName) |
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58 | : G4HadronicProcess(pName) |
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59 | { |
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60 | SetProcessSubType(fHadronElastic); |
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61 | AddDataSet(new G4HadronElasticDataSet); |
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62 | theNeutron = G4Neutron::Neutron(); |
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63 | lowestEnergy = 1.*keV; |
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64 | lowestEnergyNeutron = 1.e-6*eV; |
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65 | } |
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66 | |
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67 | G4WHadronElasticProcess::~G4WHadronElasticProcess() |
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68 | { |
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69 | } |
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70 | |
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71 | G4VParticleChange* G4WHadronElasticProcess::PostStepDoIt( |
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72 | const G4Track& track, |
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73 | const G4Step& step) |
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74 | { |
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75 | aParticleChange.Initialize(track); |
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76 | G4double kineticEnergy = track.GetKineticEnergy(); |
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77 | const G4DynamicParticle* dynParticle = track.GetDynamicParticle(); |
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78 | const G4ParticleDefinition* part = dynParticle->GetDefinition(); |
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79 | |
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80 | // protection against numerical problems |
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81 | if(part == theNeutron) { |
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82 | if(kineticEnergy <= lowestEnergyNeutron) |
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83 | return G4VDiscreteProcess::PostStepDoIt(track,step); |
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84 | } else { |
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85 | if(kineticEnergy <= lowestEnergy) |
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86 | return G4VDiscreteProcess::PostStepDoIt(track,step); |
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87 | } |
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88 | |
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89 | G4Material* material = track.GetMaterial(); |
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90 | G4CrossSectionDataStore* store = GetCrossSectionDataStore(); |
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91 | G4double xsec = store->GetCrossSection(dynParticle,material); |
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92 | if(xsec <= DBL_MIN) return G4VDiscreteProcess::PostStepDoIt(track,step); |
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93 | |
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94 | // Select element |
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95 | G4Element* elm = store->SampleZandA(dynParticle,material,targetNucleus); |
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96 | |
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97 | G4HadronicInteraction* hadi = |
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98 | ChooseHadronicInteraction( kineticEnergy, material, elm); |
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99 | |
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100 | size_t idx = track.GetMaterialCutsCouple()->GetIndex(); |
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101 | G4double tcut = |
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102 | (*(G4ProductionCutsTable::GetProductionCutsTable()->GetEnergyCutsVector(3)))[idx]; |
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103 | hadi->SetRecoilEnergyThreshold(tcut); |
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104 | |
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105 | // Initialize the hadronic projectile from the track |
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106 | // G4cout << "track " << track.GetDynamicParticle()->Get4Momentum()<<G4endl; |
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107 | G4HadProjectile thePro(track); |
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108 | if(verboseLevel>1) { |
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109 | G4cout << "G4WHadronElasticProcess::PostStepDoIt for " |
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110 | << part->GetParticleName() |
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111 | << " Target Z= " << targetNucleus.GetZ() |
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112 | << " A= " << targetNucleus.GetZ() << G4endl; |
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113 | } |
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114 | G4HadFinalState* result = hadi->ApplyYourself(thePro, targetNucleus); |
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115 | G4ThreeVector indir = track.GetMomentumDirection(); |
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116 | G4ThreeVector outdir = (result->GetMomentumChange()).rotateUz(indir); |
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117 | |
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118 | if(verboseLevel>1) { |
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119 | G4cout << "Efin= " << result->GetEnergyChange() |
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120 | << " de= " << result->GetLocalEnergyDeposit() |
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121 | << " nsec= " << result->GetNumberOfSecondaries() |
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122 | << " dir= " << outdir |
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123 | << G4endl; |
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124 | } |
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125 | |
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126 | aParticleChange.ProposeEnergy(result->GetEnergyChange()); |
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127 | aParticleChange.ProposeMomentumDirection(outdir); |
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128 | if(result->GetNumberOfSecondaries() > 0) { |
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129 | aParticleChange.SetNumberOfSecondaries(1); |
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130 | G4DynamicParticle* p = result->GetSecondary(0)->GetParticle(); |
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131 | G4ThreeVector pdir = p->GetMomentumDirection(); |
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132 | // G4cout << "recoil " << pdir << G4endl; |
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133 | pdir = pdir.rotateUz(indir); |
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134 | // G4cout << "recoil rotated " << pdir << G4endl; |
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135 | p->SetMomentumDirection(pdir); |
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136 | aParticleChange.AddSecondary(p); |
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137 | } else { |
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138 | aParticleChange.SetNumberOfSecondaries(0); |
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139 | aParticleChange.ProposeLocalEnergyDeposit(result->GetLocalEnergyDeposit()); |
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140 | } |
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141 | result->Clear(); |
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142 | |
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143 | return G4VDiscreteProcess::PostStepDoIt(track,step); |
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144 | } |
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145 | |
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146 | G4bool G4WHadronElasticProcess:: |
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147 | IsApplicable(const G4ParticleDefinition& aParticleType) |
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148 | { |
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149 | return (&aParticleType == G4PionPlus::PionPlus() || |
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150 | &aParticleType == G4PionMinus::PionMinus() || |
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151 | &aParticleType == G4KaonPlus::KaonPlus() || |
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152 | &aParticleType == G4KaonZeroShort::KaonZeroShort() || |
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153 | &aParticleType == G4KaonZeroLong::KaonZeroLong() || |
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154 | &aParticleType == G4KaonMinus::KaonMinus() || |
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155 | &aParticleType == G4Proton::Proton() || |
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156 | &aParticleType == G4AntiProton::AntiProton() || |
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157 | &aParticleType == G4Neutron::Neutron() || |
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158 | &aParticleType == G4AntiNeutron::AntiNeutron() || |
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159 | &aParticleType == G4Lambda::Lambda() || |
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160 | &aParticleType == G4AntiLambda::AntiLambda() || |
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161 | &aParticleType == G4SigmaPlus::SigmaPlus() || |
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162 | &aParticleType == G4SigmaZero::SigmaZero() || |
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163 | &aParticleType == G4SigmaMinus::SigmaMinus() || |
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164 | &aParticleType == G4AntiSigmaPlus::AntiSigmaPlus() || |
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165 | &aParticleType == G4AntiSigmaZero::AntiSigmaZero() || |
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166 | &aParticleType == G4AntiSigmaMinus::AntiSigmaMinus() || |
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167 | &aParticleType == G4XiZero::XiZero() || |
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168 | &aParticleType == G4XiMinus::XiMinus() || |
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169 | &aParticleType == G4AntiXiZero::AntiXiZero() || |
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170 | &aParticleType == G4AntiXiMinus::AntiXiMinus() || |
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171 | &aParticleType == G4Deuteron::Deuteron() || |
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172 | &aParticleType == G4Triton::Triton() || |
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173 | &aParticleType == G4He3::He3() || |
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174 | &aParticleType == G4Alpha::Alpha() || |
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175 | &aParticleType == G4OmegaMinus::OmegaMinus() || |
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176 | &aParticleType == G4AntiOmegaMinus::AntiOmegaMinus() || |
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177 | &aParticleType == G4GenericIon::GenericIon()); |
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178 | } |
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179 | |
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180 | |
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