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15 | // * use. Please see the license in the file LICENSE and URL above * |
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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 | // 12-Apr-06 fix in delayed neutron and photon emission without FS data by T. Koi |
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31 | // |
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32 | #include "G4NeutronHPFissionFS.hh" |
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33 | #include "G4Nucleus.hh" |
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34 | #include "G4DynamicParticleVector.hh" |
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35 | #include "G4NeutronHPFissionERelease.hh" |
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36 | void G4NeutronHPFissionFS::Init (G4double A, G4double Z, G4String & dirName, G4String & aFSType) |
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37 | { |
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38 | theFS.Init(A, Z, dirName, aFSType); |
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39 | theFC.Init(A, Z, dirName, aFSType); |
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40 | theSC.Init(A, Z, dirName, aFSType); |
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41 | theTC.Init(A, Z, dirName, aFSType); |
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42 | theLC.Init(A, Z, dirName, aFSType); |
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43 | } |
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44 | G4HadFinalState * G4NeutronHPFissionFS::ApplyYourself(const G4HadProjectile & theTrack) |
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45 | { |
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46 | // prepare neutron |
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47 | theResult.Clear(); |
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48 | G4double eKinetic = theTrack.GetKineticEnergy(); |
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49 | const G4HadProjectile *incidentParticle = &theTrack; |
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50 | G4ReactionProduct theNeutron( const_cast<G4ParticleDefinition *>(incidentParticle->GetDefinition()) ); |
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51 | theNeutron.SetMomentum( incidentParticle->Get4Momentum().vect() ); |
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52 | theNeutron.SetKineticEnergy( eKinetic ); |
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53 | |
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54 | // prepare target |
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55 | G4Nucleus aNucleus; |
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56 | G4ReactionProduct theTarget; |
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57 | G4double targetMass = theFS.GetMass(); |
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58 | G4ThreeVector neuVelo = (1./incidentParticle->GetDefinition()->GetPDGMass())*theNeutron.GetMomentum(); |
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59 | theTarget = aNucleus.GetBiasedThermalNucleus( targetMass, neuVelo, theTrack.GetMaterial()->GetTemperature()); |
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60 | |
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61 | // set neutron and target in the FS classes |
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62 | theFS.SetNeutron(theNeutron); |
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63 | theFS.SetTarget(theTarget); |
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64 | theFC.SetNeutron(theNeutron); |
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65 | theFC.SetTarget(theTarget); |
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66 | theSC.SetNeutron(theNeutron); |
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67 | theSC.SetTarget(theTarget); |
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68 | theTC.SetNeutron(theNeutron); |
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69 | theTC.SetTarget(theTarget); |
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70 | theLC.SetNeutron(theNeutron); |
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71 | theLC.SetTarget(theTarget); |
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72 | |
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73 | // boost to target rest system and decide on channel. |
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74 | theNeutron.Lorentz(theNeutron, -1*theTarget); |
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75 | |
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76 | // dice the photons |
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77 | |
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78 | G4DynamicParticleVector * thePhotons; |
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79 | thePhotons = theFS.GetPhotons(); |
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80 | |
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81 | // select the FS in charge |
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82 | |
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83 | eKinetic = theNeutron.GetKineticEnergy(); |
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84 | G4double xSec[4]; |
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85 | xSec[0] = theFC.GetXsec(eKinetic); |
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86 | xSec[1] = xSec[0]+theSC.GetXsec(eKinetic); |
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87 | xSec[2] = xSec[1]+theTC.GetXsec(eKinetic); |
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88 | xSec[3] = xSec[2]+theLC.GetXsec(eKinetic); |
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89 | G4int it; |
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90 | unsigned int i=0; |
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91 | G4double random = G4UniformRand(); |
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92 | if(xSec[3]==0) |
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93 | { |
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94 | it=-1; |
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95 | } |
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96 | else |
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97 | { |
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98 | for(i=0; i<4; i++) |
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99 | { |
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100 | it =i; |
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101 | if(random<xSec[i]/xSec[3]) break; |
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102 | } |
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103 | } |
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104 | |
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105 | // dice neutron multiplicities, energies and momenta in Lab. @@ |
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106 | // no energy conservation on an event-to-event basis. we rely on the data to be ok. @@ |
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107 | // also for mean, we rely on the consistancy of the data. @@ |
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108 | |
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109 | G4int Prompt=0, delayed=0, all=0; |
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110 | G4DynamicParticleVector * theNeutrons = 0; |
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111 | switch(it) // check logic, and ask, if partials can be assumed to correspond to individual particles @@@ |
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112 | { |
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113 | case 0: |
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114 | theFS.SampleNeutronMult(all, Prompt, delayed, eKinetic, 0); |
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115 | if(Prompt==0&&delayed==0) Prompt=all; |
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116 | theNeutrons = theFC.ApplyYourself(Prompt); // delayed always in FS |
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117 | // take 'U' into account explicitely (see 5.4) in the sampling of energy @@@@ |
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118 | break; |
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119 | case 1: |
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120 | theFS.SampleNeutronMult(all, Prompt, delayed, eKinetic, 1); |
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121 | if(Prompt==0&&delayed==0) Prompt=all; |
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122 | theNeutrons = theSC.ApplyYourself(Prompt); // delayed always in FS, off done in FSFissionFS |
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123 | break; |
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124 | case 2: |
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125 | theFS.SampleNeutronMult(all, Prompt, delayed, eKinetic, 2); |
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126 | if(Prompt==0&&delayed==0) Prompt=all; |
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127 | theNeutrons = theTC.ApplyYourself(Prompt); // delayed always in FS |
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128 | break; |
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129 | case 3: |
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130 | theFS.SampleNeutronMult(all, Prompt, delayed, eKinetic, 3); |
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131 | if(Prompt==0&&delayed==0) Prompt=all; |
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132 | theNeutrons = theLC.ApplyYourself(Prompt); // delayed always in FS |
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133 | break; |
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134 | default: |
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135 | break; |
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136 | } |
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137 | // dice delayed neutrons and photons, and fallback |
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138 | // for Prompt in case channel had no FS data; add all paricles to FS. |
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139 | |
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140 | G4double * theDecayConstants; |
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141 | |
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142 | if(theNeutrons != 0) |
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143 | { |
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144 | theDecayConstants = new G4double[delayed]; |
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145 | G4int nPhotons = 0; |
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146 | if(thePhotons!=0) nPhotons = thePhotons->size(); |
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147 | for(i=0; i<theNeutrons->size(); i++) |
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148 | { |
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149 | theResult.AddSecondary(theNeutrons->operator[](i)); |
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150 | } |
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151 | delete theNeutrons; |
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152 | |
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153 | G4DynamicParticleVector * theDelayed = 0; |
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154 | theDelayed = theFS.ApplyYourself(0, delayed, theDecayConstants); |
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155 | for(i=0; i<theDelayed->size(); i++) |
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156 | { |
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157 | G4double time = -std::log(G4UniformRand())/theDecayConstants[i]; |
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158 | time += theTrack.GetGlobalTime(); |
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159 | G4HadSecondary * track = new G4HadSecondary(theDelayed->operator[](i)); |
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160 | track->SetTime(time); |
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161 | theResult.AddSecondary(track); |
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162 | } |
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163 | delete theDelayed; |
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164 | } |
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165 | else |
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166 | { |
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167 | // cout << " all = "<<all<<G4endl; |
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168 | theFS.SampleNeutronMult(all, Prompt, delayed, eKinetic, 0); |
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169 | theDecayConstants = new G4double[delayed]; |
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170 | if(Prompt==0&&delayed==0) Prompt=all; |
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171 | theNeutrons = theFS.ApplyYourself(Prompt, delayed, theDecayConstants); |
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172 | G4int nPhotons = 0; |
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173 | if(thePhotons!=0) nPhotons = thePhotons->size(); |
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174 | G4int i0; |
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175 | for(i0=0; i0<Prompt; i0++) |
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176 | { |
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177 | theResult.AddSecondary(theNeutrons->operator[](i0)); |
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178 | } |
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179 | for(i0=Prompt; i0<Prompt+delayed; i0++) |
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180 | { |
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181 | G4double time = -std::log(G4UniformRand())/theDecayConstants[i0-Prompt]; |
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182 | time += theTrack.GetGlobalTime(); |
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183 | //G4HadSecondary * track = new G4HadSecondary(theNeutrons->operator[](i)); this line will be delete |
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184 | G4HadSecondary * track = new G4HadSecondary( theNeutrons->operator[]( i0 ) ); |
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185 | track->SetTime(time); |
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186 | theResult.AddSecondary(track); |
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187 | } |
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188 | delete theNeutrons; |
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189 | } |
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190 | delete [] theDecayConstants; |
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191 | // cout << "all delayed "<<delayed<<G4endl; |
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192 | unsigned int nPhotons = 0; |
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193 | if(thePhotons!=0) |
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194 | { |
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195 | nPhotons = thePhotons->size(); |
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196 | for(i=0; i<nPhotons; i++) |
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197 | { |
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198 | theResult.AddSecondary(thePhotons->operator[](i)); |
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199 | } |
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200 | delete thePhotons; |
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201 | } |
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202 | |
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203 | // finally deal with local energy depositions. |
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204 | // G4cout <<"Number of secondaries = "<<theResult.GetNumberOfSecondaries()<< G4endl; |
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205 | // G4cout <<"Number of photons = "<<nPhotons<<G4endl; |
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206 | // G4cout <<"Number of Prompt = "<<Prompt<<G4endl; |
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207 | // G4cout <<"Number of delayed = "<<delayed<<G4endl; |
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208 | |
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209 | G4NeutronHPFissionERelease * theERelease = theFS.GetEnergyRelease(); |
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210 | G4double eDepByFragments = theERelease->GetFragmentKinetic(); |
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211 | theResult.SetLocalEnergyDeposit(eDepByFragments); |
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212 | // cout << "local energy deposit" << eDepByFragments<<G4endl; |
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213 | // clean up the primary neutron |
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214 | theResult.SetStatusChange(stopAndKill); |
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215 | return &theResult; |
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216 | } |
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