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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24 | // ******************************************************************** |
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25 | // |
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26 | // neutron_hp -- source file |
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27 | // J.P. Wellisch, Nov-1996 |
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28 | // A prototype of the low energy neutron transport model. |
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29 | // |
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30 | #include "G4NeutronHPInelasticBaseFS.hh" |
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31 | #include "G4Nucleus.hh" |
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32 | #include "G4NucleiPropertiesTable.hh" |
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33 | #include "G4He3.hh" |
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34 | #include "G4Alpha.hh" |
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35 | #include "G4Electron.hh" |
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36 | #include "G4NeutronHPDataUsed.hh" |
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37 | |
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38 | void G4NeutronHPInelasticBaseFS::InitGammas(G4double AR, G4double ZR) |
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39 | { |
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40 | // char the[100] = {""}; |
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41 | // std::ostrstream ost(the, 100, std::ios::out); |
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42 | // ost <<gammaPath<<"z"<<ZR<<".a"<<AR; |
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43 | // G4String * aName = new G4String(the); |
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44 | // std::ifstream from(*aName, std::ios::in); |
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45 | |
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46 | std::ostringstream ost; |
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47 | ost <<gammaPath<<"z"<<ZR<<".a"<<AR; |
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48 | G4String aName = ost.str(); |
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49 | std::ifstream from(aName, std::ios::in); |
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50 | |
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51 | if(!from) return; // no data found for this isotope |
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52 | // std::ifstream theGammaData(*aName, std::ios::in); |
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53 | std::ifstream theGammaData(aName, std::ios::in); |
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54 | |
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55 | G4double eps = 0.001; |
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56 | theNuclearMassDifference = |
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57 | G4NucleiPropertiesTable::GetBindingEnergy(static_cast<G4int>(ZR+eps),static_cast<G4int>(AR+eps)) - |
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58 | G4NucleiPropertiesTable::GetBindingEnergy(static_cast<G4int>(theBaseZ+eps), static_cast<G4int>(theBaseA+eps)); |
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59 | theGammas.Init(theGammaData); |
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60 | // delete aName; |
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61 | } |
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62 | |
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63 | void G4NeutronHPInelasticBaseFS::Init (G4double A, G4double Z, G4String & dirName, G4String & bit) |
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64 | { |
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65 | gammaPath = "/Inelastic/Gammas/"; |
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66 | if(!getenv("G4NEUTRONHPDATA")) |
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67 | throw G4HadronicException(__FILE__, __LINE__, "Please setenv G4NEUTRONHPDATA to point to the neutron cross-section files."); |
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68 | G4String tBase = getenv("G4NEUTRONHPDATA"); |
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69 | gammaPath = tBase+gammaPath; |
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70 | G4String tString = dirName; |
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71 | G4bool dbool; |
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72 | G4NeutronHPDataUsed aFile = theNames.GetName(static_cast<G4int>(A), static_cast<G4int>(Z), tString, bit, dbool); |
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73 | G4String filename = aFile.GetName(); |
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74 | theBaseA = aFile.GetA(); |
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75 | theBaseZ = aFile.GetZ(); |
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76 | if(!dbool || ( Z<2.5 && ( std::abs(theBaseZ - Z)>0.0001 || std::abs(theBaseA - A)>0.0001))) |
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77 | { |
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78 | if(getenv("NeutronHPNamesLogging")) G4cout << "Skipped = "<< filename <<" "<<A<<" "<<Z<<G4endl; |
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79 | hasAnyData = false; |
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80 | hasFSData = false; |
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81 | hasXsec = false; |
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82 | return; |
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83 | } |
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84 | theBaseA = A; |
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85 | theBaseZ = G4int(Z+.5); |
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86 | std::ifstream theData(filename, std::ios::in); |
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87 | if(!(theData)) |
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88 | { |
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89 | hasAnyData = false; |
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90 | hasFSData = false; |
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91 | hasXsec = false; |
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92 | theData.close(); |
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93 | return; // no data for exactly this isotope and FS |
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94 | } |
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95 | // here we go |
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96 | G4int infoType, dataType, dummy=INT_MAX; |
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97 | hasFSData = false; |
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98 | while (theData >> infoType) |
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99 | { |
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100 | theData >> dataType; |
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101 | if(dummy==INT_MAX) theData >> dummy >> dummy; |
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102 | if(dataType==3) |
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103 | { |
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104 | G4int total; |
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105 | theData >> total; |
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106 | theXsection->Init(theData, total, eV); |
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107 | } |
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108 | else if(dataType==4) |
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109 | { |
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110 | theAngularDistribution = new G4NeutronHPAngular; |
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111 | theAngularDistribution->Init(theData); |
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112 | hasFSData = true; |
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113 | } |
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114 | else if(dataType==5) |
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115 | { |
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116 | theEnergyDistribution = new G4NeutronHPEnergyDistribution; |
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117 | theEnergyDistribution->Init(theData); |
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118 | hasFSData = true; |
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119 | } |
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120 | else if(dataType==6) |
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121 | { |
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122 | theEnergyAngData = new G4NeutronHPEnAngCorrelation; |
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123 | theEnergyAngData->Init(theData); |
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124 | hasFSData = true; |
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125 | } |
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126 | else if(dataType==12) |
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127 | { |
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128 | theFinalStatePhotons = new G4NeutronHPPhotonDist; |
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129 | theFinalStatePhotons->InitMean(theData); |
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130 | hasFSData = true; |
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131 | } |
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132 | else if(dataType==13) |
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133 | { |
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134 | theFinalStatePhotons = new G4NeutronHPPhotonDist; |
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135 | theFinalStatePhotons->InitPartials(theData); |
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136 | hasFSData = true; |
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137 | } |
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138 | else if(dataType==14) |
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139 | { |
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140 | theFinalStatePhotons->InitAngular(theData); |
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141 | hasFSData = true; |
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142 | } |
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143 | else if(dataType==15) |
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144 | { |
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145 | theFinalStatePhotons->InitEnergies(theData); |
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146 | hasFSData = true; |
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147 | } |
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148 | else |
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149 | { |
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150 | throw G4HadronicException(__FILE__, __LINE__, "Data-type unknown to G4NeutronHPInelasticBaseFS"); |
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151 | } |
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152 | } |
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153 | theData.close(); |
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154 | } |
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155 | |
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156 | void G4NeutronHPInelasticBaseFS::BaseApply(const G4HadProjectile & theTrack, |
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157 | G4ParticleDefinition ** theDefs, |
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158 | G4int nDef) |
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159 | { |
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160 | |
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161 | // prepare neutron |
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162 | theResult.Clear(); |
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163 | G4double eKinetic = theTrack.GetKineticEnergy(); |
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164 | const G4HadProjectile *incidentParticle = &theTrack; |
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165 | G4ReactionProduct theNeutron( const_cast<G4ParticleDefinition *>(incidentParticle->GetDefinition()) ); |
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166 | theNeutron.SetMomentum( incidentParticle->Get4Momentum().vect() ); |
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167 | theNeutron.SetKineticEnergy( eKinetic ); |
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168 | |
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169 | // prepare target |
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170 | G4double targetMass; |
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171 | G4double eps = 0.0001; |
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172 | targetMass = ( G4NucleiPropertiesTable::GetNuclearMass(static_cast<G4int>(theBaseZ+eps), static_cast<G4int>(theBaseA+eps))) / |
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173 | G4Neutron::Neutron()->GetPDGMass(); |
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174 | if(theEnergyAngData!=0) |
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175 | { targetMass = theEnergyAngData->GetTargetMass(); } |
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176 | if(theAngularDistribution!=0) |
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177 | { targetMass = theAngularDistribution->GetTargetMass(); } |
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178 | G4Nucleus aNucleus; |
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179 | G4ReactionProduct theTarget; |
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180 | G4ThreeVector neuVelo = (1./incidentParticle->GetDefinition()->GetPDGMass())*theNeutron.GetMomentum(); |
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181 | theTarget = aNucleus.GetBiasedThermalNucleus( targetMass, neuVelo, theTrack.GetMaterial()->GetTemperature()); |
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182 | |
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183 | // prepare energy in target rest frame |
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184 | G4ReactionProduct boosted; |
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185 | boosted.Lorentz(theNeutron, theTarget); |
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186 | eKinetic = boosted.GetKineticEnergy(); |
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187 | G4double orgMomentum = boosted.GetMomentum().mag(); |
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188 | |
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189 | // Take N-body phase-space distribution, if no other data present. |
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190 | if(!HasFSData()) // adding the residual is trivial here @@@ |
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191 | { |
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192 | G4NeutronHPNBodyPhaseSpace thePhaseSpaceDistribution; |
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193 | G4double aPhaseMass=0; |
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194 | G4int ii; |
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195 | for(ii=0; ii<nDef; ii++) |
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196 | { |
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197 | aPhaseMass+=theDefs[ii]->GetPDGMass(); |
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198 | } |
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199 | thePhaseSpaceDistribution.Init(aPhaseMass, nDef); |
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200 | thePhaseSpaceDistribution.SetNeutron(&theNeutron); |
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201 | thePhaseSpaceDistribution.SetTarget(&theTarget); |
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202 | for(ii=0; ii<nDef; ii++) |
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203 | { |
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204 | G4double massCode = 1000.*std::abs(theDefs[ii]->GetPDGCharge()); |
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205 | massCode += theDefs[ii]->GetBaryonNumber(); |
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206 | G4double dummy = 0; |
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207 | G4ReactionProduct * aSec = thePhaseSpaceDistribution.Sample(eKinetic, massCode, dummy); |
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208 | aSec->Lorentz(*aSec, -1.*theTarget); |
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209 | G4DynamicParticle * aPart = new G4DynamicParticle(); |
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210 | aPart->SetDefinition(aSec->GetDefinition()); |
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211 | aPart->SetMomentum(aSec->GetMomentum()); |
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212 | delete aSec; |
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213 | theResult.AddSecondary(aPart); |
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214 | } |
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215 | theResult.SetStatusChange(stopAndKill); |
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216 | return; |
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217 | } |
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218 | |
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219 | // set target and neutron in the relevant exit channel |
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220 | if(theAngularDistribution!=0) |
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221 | { |
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222 | theAngularDistribution->SetTarget(theTarget); |
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223 | theAngularDistribution->SetNeutron(theNeutron); |
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224 | } |
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225 | else if(theEnergyAngData!=0) |
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226 | { |
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227 | theEnergyAngData->SetTarget(theTarget); |
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228 | theEnergyAngData->SetNeutron(theNeutron); |
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229 | } |
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230 | |
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231 | G4ReactionProductVector * tmpHadrons = 0; |
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232 | G4int ii, dummy; |
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233 | unsigned int i; |
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234 | if(theEnergyAngData != 0) |
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235 | { |
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236 | tmpHadrons = theEnergyAngData->Sample(eKinetic); |
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237 | } |
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238 | else if(theAngularDistribution!= 0) |
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239 | { |
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240 | G4bool * Done = new G4bool[nDef]; |
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241 | G4int i0; |
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242 | for(i0=0; i0<nDef; i0++) Done[i0] = false; |
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243 | if(tmpHadrons == 0) |
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244 | { |
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245 | tmpHadrons = new G4ReactionProductVector; |
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246 | } |
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247 | else |
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248 | { |
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249 | for(i=0; i<tmpHadrons->size(); i++) |
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250 | { |
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251 | for(ii=0; ii<nDef; ii++) |
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252 | if(!Done[ii] && tmpHadrons->operator[](i)->GetDefinition() == theDefs[ii]) |
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253 | Done[ii] = true; |
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254 | } |
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255 | } |
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256 | G4ReactionProduct * aHadron; |
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257 | G4double localMass = ( G4NucleiPropertiesTable::GetNuclearMass(static_cast<G4int>(theBaseZ+eps), static_cast<G4int>(theBaseA+eps))); |
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258 | G4ThreeVector bufferedDirection(0,0,0); |
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259 | for(i0=0; i0<nDef; i0++) |
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260 | { |
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261 | if(!Done[i0]) |
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262 | { |
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263 | aHadron = new G4ReactionProduct; |
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264 | if(theEnergyDistribution!=0) |
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265 | { |
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266 | aHadron->SetDefinition(theDefs[i0]); |
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267 | aHadron->SetKineticEnergy(theEnergyDistribution->Sample(eKinetic, dummy)); |
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268 | } |
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269 | else if(nDef == 1) |
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270 | { |
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271 | aHadron->SetDefinition(theDefs[i0]); |
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272 | aHadron->SetKineticEnergy(eKinetic); |
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273 | } |
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274 | else if(nDef == 2) |
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275 | { |
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276 | aHadron->SetDefinition(theDefs[i0]); |
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277 | aHadron->SetKineticEnergy(50*MeV); |
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278 | } |
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279 | else |
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280 | { |
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281 | throw G4HadronicException(__FILE__, __LINE__, "No energy distribution to sample from in InelasticBaseFS::BaseApply"); |
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282 | } |
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283 | theAngularDistribution->SampleAndUpdate(*aHadron); |
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284 | if(theEnergyDistribution==0 && nDef == 2) |
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285 | { |
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286 | if(i0==0) |
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287 | { |
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288 | G4double m1 = theDefs[0]->GetPDGMass(); |
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289 | G4double m2 = theDefs[1]->GetPDGMass(); |
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290 | G4double mn = G4Neutron::Neutron()->GetPDGMass(); |
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291 | G4int z1 = static_cast<G4int>(theBaseZ+eps-theDefs[0]->GetPDGCharge()-theDefs[1]->GetPDGCharge()); |
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292 | G4int a1 = static_cast<G4int>(theBaseA+eps)-theDefs[0]->GetBaryonNumber()-theDefs[1]->GetBaryonNumber(); |
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293 | G4double concreteMass = G4NucleiPropertiesTable::GetNuclearMass(z1, a1); |
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294 | G4double availableEnergy = eKinetic+mn+localMass-m1-m2-concreteMass; |
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295 | // available kinetic energy in CMS (non relativistic) |
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296 | G4double emin = availableEnergy+m1+m2 - std::sqrt((m1+m2)*(m1+m2)+orgMomentum*orgMomentum); |
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297 | G4double p1=std::sqrt(2.*m2*emin); |
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298 | bufferedDirection = p1*aHadron->GetMomentum().unit(); |
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299 | if(getenv("HTOKEN")) // @@@@@ verify the nucleon counting... |
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300 | { |
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301 | G4cout << "HTOKEN "<<z1<<" "<<theBaseZ<<" "<<a1<<" "<<theBaseA<<" "<<availableEnergy<<" " |
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302 | << emin<<G4endl; |
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303 | } |
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304 | } |
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305 | else |
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306 | { |
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307 | bufferedDirection = -bufferedDirection; |
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308 | } |
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309 | // boost from cms to lab |
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310 | if(getenv("HTOKEN")) |
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311 | { |
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312 | G4cout << " HTOKEN "<<bufferedDirection.mag2()<<G4endl; |
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313 | } |
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314 | aHadron->SetTotalEnergy( std::sqrt(aHadron->GetMass()*aHadron->GetMass() |
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315 | +bufferedDirection.mag2()) ); |
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316 | aHadron->SetMomentum(bufferedDirection); |
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317 | aHadron->Lorentz(*aHadron, -1.*(theTarget+theNeutron)); |
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318 | if(getenv("HTOKEN")) |
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319 | { |
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320 | G4cout << " HTOKEN "<<aHadron->GetTotalEnergy()<<" "<<aHadron->GetMomentum()<<G4endl; |
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321 | } |
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322 | } |
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323 | tmpHadrons->push_back(aHadron); |
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324 | } |
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325 | } |
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326 | delete [] Done; |
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327 | } |
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328 | else |
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329 | { |
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330 | throw G4HadronicException(__FILE__, __LINE__, "No data to create the neutrons in NInelasticFS"); |
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331 | } |
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332 | |
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333 | G4ReactionProductVector * thePhotons = 0; |
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334 | if(theFinalStatePhotons!=0) |
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335 | { |
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336 | // the photon distributions are in the Nucleus rest frame. |
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337 | G4ReactionProduct boosted; |
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338 | boosted.Lorentz(theNeutron, theTarget); |
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339 | G4double anEnergy = boosted.GetKineticEnergy(); |
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340 | thePhotons = theFinalStatePhotons->GetPhotons(anEnergy); |
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341 | if(thePhotons!=0) |
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342 | { |
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343 | for(i=0; i<thePhotons->size(); i++) |
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344 | { |
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345 | // back to lab |
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346 | thePhotons->operator[](i)->Lorentz(*(thePhotons->operator[](i)), -1.*theTarget); |
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347 | } |
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348 | } |
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349 | } |
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350 | else if(theEnergyAngData!=0) |
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351 | { |
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352 | G4double theGammaEnergy = theEnergyAngData->GetTotalMeanEnergy(); |
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353 | G4double anEnergy = boosted.GetKineticEnergy(); |
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354 | theGammaEnergy = anEnergy-theGammaEnergy; |
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355 | theGammaEnergy += theNuclearMassDifference; |
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356 | G4double eBindProducts = 0; |
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357 | G4double eBindN = 0; |
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358 | G4double eBindP = 0; |
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359 | G4double eBindD = G4NucleiPropertiesTable::GetBindingEnergy(1,2); |
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360 | G4double eBindT = G4NucleiPropertiesTable::GetBindingEnergy(1,3); |
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361 | G4double eBindHe3 = G4NucleiPropertiesTable::GetBindingEnergy(2,3); |
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362 | G4double eBindA = G4NucleiPropertiesTable::GetBindingEnergy(2,4); |
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363 | for(i=0; i<tmpHadrons->size(); i++) |
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364 | { |
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365 | if(tmpHadrons->operator[](i)->GetDefinition() == G4Neutron::Neutron()) |
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366 | { |
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367 | eBindProducts+=eBindN; |
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368 | } |
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369 | else if(tmpHadrons->operator[](i)->GetDefinition() == G4Proton::Proton()) |
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370 | { |
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371 | eBindProducts+=eBindP; |
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372 | } |
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373 | else if(tmpHadrons->operator[](i)->GetDefinition() == G4Deuteron::Deuteron()) |
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374 | { |
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375 | eBindProducts+=eBindD; |
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376 | } |
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377 | else if(tmpHadrons->operator[](i)->GetDefinition() == G4Triton::Triton()) |
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378 | { |
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379 | eBindProducts+=eBindT; |
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380 | } |
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381 | else if(tmpHadrons->operator[](i)->GetDefinition() == G4He3::He3()) |
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382 | { |
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383 | eBindProducts+=eBindHe3; |
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384 | } |
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385 | else if(tmpHadrons->operator[](i)->GetDefinition() == G4Alpha::Alpha()) |
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386 | { |
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387 | eBindProducts+=eBindA; |
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388 | } |
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389 | } |
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390 | theGammaEnergy += eBindProducts; |
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391 | |
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392 | G4ReactionProductVector * theOtherPhotons = 0; |
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393 | G4int iLevel; |
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394 | while(theGammaEnergy>=theGammas.GetLevelEnergy(0)) |
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395 | { |
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396 | for(iLevel=theGammas.GetNumberOfLevels()-1; iLevel>=0; iLevel--) |
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397 | { |
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398 | if(theGammas.GetLevelEnergy(iLevel)<theGammaEnergy) break; |
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399 | } |
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400 | if(iLevel==0||iLevel==theGammas.GetNumberOfLevels()-1) |
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401 | { |
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402 | theOtherPhotons = theGammas.GetDecayGammas(iLevel); |
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403 | } |
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404 | else |
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405 | { |
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406 | G4double random = G4UniformRand(); |
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407 | G4double eLow = theGammas.GetLevelEnergy(iLevel); |
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408 | G4double eHigh = theGammas.GetLevelEnergy(iLevel+1); |
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409 | if(random > (eHigh-eLow)/(theGammaEnergy-eLow)) iLevel++; |
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410 | theOtherPhotons = theGammas.GetDecayGammas(iLevel); |
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411 | } |
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412 | if(thePhotons==0) thePhotons = new G4ReactionProductVector; |
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413 | if(theOtherPhotons != 0) |
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414 | { |
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415 | for(unsigned int ii=0; ii<theOtherPhotons->size(); ii++) |
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416 | { |
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417 | thePhotons->push_back(theOtherPhotons->operator[](ii)); |
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418 | } |
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419 | delete theOtherPhotons; |
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420 | } |
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421 | theGammaEnergy -= theGammas.GetLevelEnergy(iLevel); |
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422 | if(iLevel == -1) break; |
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423 | } |
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424 | } |
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425 | |
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426 | // fill the result |
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427 | unsigned int nSecondaries = tmpHadrons->size(); |
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428 | unsigned int nPhotons = 0; |
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429 | if(thePhotons!=0) { nPhotons = thePhotons->size(); } |
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430 | nSecondaries += nPhotons; |
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431 | G4DynamicParticle * theSec; |
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432 | |
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433 | for(i=0; i<nSecondaries-nPhotons; i++) |
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434 | { |
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435 | theSec = new G4DynamicParticle; |
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436 | theSec->SetDefinition(tmpHadrons->operator[](i)->GetDefinition()); |
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437 | theSec->SetMomentum(tmpHadrons->operator[](i)->GetMomentum()); |
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438 | theResult.AddSecondary(theSec); |
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439 | delete tmpHadrons->operator[](i); |
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440 | } |
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441 | if(thePhotons != 0) |
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442 | { |
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443 | for(i=0; i<nPhotons; i++) |
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444 | { |
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445 | theSec = new G4DynamicParticle; |
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446 | theSec->SetDefinition(thePhotons->operator[](i)->GetDefinition()); |
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447 | theSec->SetMomentum(thePhotons->operator[](i)->GetMomentum()); |
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448 | theResult.AddSecondary(theSec); |
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449 | delete thePhotons->operator[](i); |
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450 | } |
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451 | } |
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452 | |
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453 | // some garbage collection |
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454 | delete thePhotons; |
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455 | delete tmpHadrons; |
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456 | |
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457 | // clean up the primary neutron |
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458 | theResult.SetStatusChange(stopAndKill); |
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459 | } |
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